deps: update v8 to 3.15.11

494 files changed, 50379 insertions, 31813 deletions

diff --git a/deps/v8/.gitignore b/deps/v8/.gitignore
index 77f38dd9c6..fe8425f021 100644
--- a/deps/v8/.gitignore
+++ b/deps/v8/.gitignore
@@ -18,6 +18,7 @@
 #*#
 *~
 .cpplint-cache
+.d8_history
 d8
 d8_g
 shell
@@ -25,17 +26,32 @@ shell_g
 /build/Debug
 /build/gyp
 /build/Release
-/obj/
-/out/
+/obj
+/out
+/test/cctest/cctest.status2
 /test/es5conform/data
+/test/message/message.status2
+/test/mjsunit/mjsunit.status2
+/test/mozilla/CHECKED_OUT_VERSION
 /test/mozilla/data
+/test/mozilla/downloaded_*
+/test/mozilla/mozilla.status2
+/test/preparser/preparser.status2
 /test/sputnik/sputniktests
 /test/test262/data
+/test/test262/test262-*
+/test/test262/test262.status2
 /third_party
+/tools/jsfunfuzz
+/tools/jsfunfuzz.zip
 /tools/oom_dump/oom_dump
 /tools/oom_dump/oom_dump.o
 /tools/visual_studio/Debug
 /tools/visual_studio/Release
-/xcodebuild/
+/xcodebuild
 TAGS
 *.Makefile
+GTAGS
+GRTAGS
+GSYMS
+GPATH
diff --git a/deps/v8/AUTHORS b/deps/v8/AUTHORS
index 1156d94958..c279e7c2d9 100644
--- a/deps/v8/AUTHORS
+++ b/deps/v8/AUTHORS
@@ -20,6 +20,7 @@ Burcu Dogan <burcujdogan@gmail.com>
 Craig Schlenter <craig.schlenter@gmail.com>
 Daniel Andersson <kodandersson@gmail.com>
 Daniel James <dnljms@gmail.com>
+Derek J Conrod <dconrod@codeaurora.org>
 Dineel D Sule <dsule@codeaurora.org>
 Erich Ocean <erich.ocean@me.com>
 Fedor Indutny <fedor@indutny.com>
@@ -44,6 +45,7 @@ Paolo Giarrusso <p.giarrusso@gmail.com>
 Patrick Gansterer <paroga@paroga.com>
 Peter Varga <pvarga@inf.u-szeged.hu>
 Rafal Krypa <rafal@krypa.net>
+Rajeev R Krithivasan <rkrithiv@codeaurora.org>
 Rene Rebe <rene@exactcode.de>
 Robert Mustacchi <rm@fingolfin.org>
 Rodolph Perfetta <rodolph.perfetta@arm.com>
@@ -53,6 +55,7 @@ Sanjoy Das <sanjoy@playingwithpointers.com>
 Subrato K De <subratokde@codeaurora.org>
 Tobias Burnus <burnus@net-b.de>
 Vlad Burlik <vladbph@gmail.com>
+Xi Qian <xi.qian@intel.com>
 Yuqiang Xian <yuqiang.xian@intel.com>
 Zaheer Ahmad <zahmad@codeaurora.org>
 Zhongping Wang <kewpie.w.zp@gmail.com>
diff --git a/deps/v8/ChangeLog b/deps/v8/ChangeLog
index 7110aa83e3..52601a467e 100644
--- a/deps/v8/ChangeLog
+++ b/deps/v8/ChangeLog
@@ -1,3 +1,310 @@
+2012-12-10: Version 3.15.11
+
+        Define CAN_USE_VFP2/3_INSTRUCTIONS based on arm_neon and arm_fpu GYP
+        flags.
+
+        Performance and stability improvements on all platforms.
+
+
+2012-12-07: Version 3.15.10
+
+        Enabled optimisation of functions inside eval. (issue 2315)
+
+        Fixed spec violations in methods of Number.prototype. (issue 2443)
+
+        Added GCTracer metrics for a scavenger GC for DOM wrappers.
+
+        Performance and stability improvements on all platforms.
+
+
+2012-12-06: Version 3.15.9
+
+        Fixed candidate eviction in code flusher.
+        (Chromium issue 159140)
+
+        Iterate through all arguments for side effects in Math.min/max.
+        (issue 2444)
+
+        Fixed spec violations related to regexp.lastIndex
+        (issue 2437, issue 2438)
+
+        Performance and stability improvements on all platforms.
+
+
+2012-12-04: Version 3.15.8
+
+        Enforced stack allocation of TryCatch blocks.
+        (issue 2166,chromium:152389)
+
+        Fixed external exceptions in external try-catch handlers.
+        (issue 2166)
+
+        Activated incremental code flushing by default.
+
+        Performance and stability improvements on all platforms.
+
+
+2012-11-30: Version 3.15.7
+
+        Activated code aging by default.
+
+        Included more information in --prof log.
+
+        Removed eager sweeping for lazy swept spaces. Try to find in
+        SlowAllocateRaw a bounded number of times a big enough memory slot.
+        (issue 2194)
+
+        Performance and stability improvements on all platforms.
+
+
+2012-11-26: Version 3.15.6
+
+        Ensure double arrays are filled with holes when extended from
+        variations of empty arrays. (Chromium issue 162085)
+
+        Performance and stability improvements on all platforms.
+
+
+2012-11-23: Version 3.15.5
+
+        Fixed JSON.stringify for objects with interceptor handlers.
+        (Chromium issue 161028)
+
+        Fixed corner case in x64 compare stubs. (issue 2416)
+
+        Performance and stability improvements on all platforms.
+
+
+2012-11-16: Version 3.15.4
+
+        Fixed Array.prototype.join evaluation order. (issue 2263)
+
+        Perform CPU sampling by CPU sampling thread only iff processing thread
+        is not running. (issue 2364)
+
+        When using an Object as a set in Object.getOwnPropertyNames, null out
+        the proto. (issue 2410)
+
+        Disabled EXTRA_CHECKS in Release build.
+
+        Heap explorer: Show representation of strings.
+
+        Removed 'type' and 'arguments' properties from Error object.
+        (issue 2397)
+
+        Added atomics implementation for ThreadSanitizer v2.
+        (Chromium issue 128314)
+
+        Fixed LiveEdit crashes when object/array literal is added. (issue 2368)
+
+        Performance and stability improvements on all platforms.
+
+
+2012-11-13: Version 3.15.3
+
+        Changed sample shell to send non-JS output (e.g. errors) to stderr
+        instead of stdout.
+
+        Correctly check for stack overflow even when interrupt is pending.
+        (issue 214)
+
+        Collect stack trace on stack overflow. (issue 2394)
+
+        Performance and stability improvements on all platforms.
+
+
+2012-11-12: Version 3.15.2
+
+        Function::GetScriptOrigin supplies sourceURL when script name is
+        not available.  (Chromium issue 159413)
+
+        Made formatting error message side-effect-free.  (issue 2398)
+
+        Fixed length check in JSON.stringify.  (Chromium issue 160010)
+
+        ES6: Added support for Set and Map clear method (issue 2400)
+
+        Fixed slack tracking when instance prototype changes.
+        (Chromium issue 157019)
+
+        Fixed disabling of code flusher while marking.  (Chromium issue 159140)
+
+        Added a test case for object grouping in a scavenger GC (issue 2077)
+
+        Support shared library build of Android for v8.
+        (Chromium issue 158821)
+
+        ES6: Added support for size to Set and Map (issue 2395)
+
+        Performance and stability improvements on all platforms.
+
+
+2012-11-06: Version 3.15.1
+
+        Put incremental code flushing behind a flag. (Chromium issue 159140)
+
+        Performance and stability improvements on all platforms.
+
+
+2012-10-31: Version 3.15.0
+
+        Loosened aligned code target requirement on ARM (issue 2380)
+
+        Fixed JSON.parse to treat leading zeros correctly.
+        (Chromium issue 158185)
+
+        Performance and stability improvements on all platforms.
+
+
+2012-10-22: Version 3.14.5
+
+        Killed off the SCons based build.
+
+        Added a faster API for creating v8::Integer objects.
+
+        Speeded up function deoptimization by avoiding quadratic pass over
+        optimized function list. (Chromium issue 155270)
+
+        Always invoke the default Array.sort functions from builtin functions.
+        (issue 2372)
+
+        Reverted recent CPU profiler changes because they broke --prof.
+        (issue 2364)
+
+        Switched code flushing to use different JSFunction field.
+        (issue 1609)
+
+        Performance and stability improvements on all platforms.
+
+
+2012-10-15: Version 3.14.4
+
+        Allow evals for debugger even if they are prohibited in the debugee
+        context. (Chromium issue 154733)
+
+        Enabled --verify-heap in release mode (issue 2120)
+
+        Performance and stability improvements on all platforms.
+
+
+2012-10-11: Version 3.14.3
+
+        Use native context to retrieve ErrorMessageForCodeGenerationFromStrings
+        (Chromium issue 155076).
+
+        Bumped variable limit further to 2^17 (Chromium issue 151625).
+
+        Performance and stability improvements on all platforms.
+
+
+2012-10-10: Version 3.14.2
+
+        ARM: allowed VFP3 instructions when hardfloat is enabled.
+        (Chromium issue 152506)
+
+        Fixed instance_descriptors() and PushStackTraceAndDie regressions.
+        (Chromium issue 151749)
+
+        Made GDBJIT interface compile again. (issue 1804)
+
+        Fixed Accessors::FunctionGetPrototype's proto chain traversal.
+        (Chromium issue 143967)
+
+        Made sure that names of temporaries do not clash with real variables.
+        (issue 2322)
+
+        Rejected local module declarations. (Chromium issue 150628)
+
+        Rejected uses of lexical for-loop variable on the RHS. (issue 2322)
+
+        Fixed slot recording of code target patches.
+        (Chromium issue 152615,chromium:144230)
+
+        Changed the Android makefile to use GCC 4.6 instead of GCC 4.4.3.
+
+        Performance and stability improvements on all platforms.
+
+
+2012-10-01: Version 3.14.1
+
+        Don't set -m32 flag when compiling with Android ARM compiler.
+        (Chromium issue 143889)
+
+        Restore the descriptor array before returning allocation failure.
+        (Chromium issue 151750)
+
+        Lowered kMaxVirtualRegisters (v8 issue 2139, Chromium issues 123822 and
+        128252).
+
+        Pull more recent gyp in 'make dependencies'.
+
+        Made sure that the generic KeyedStoreIC changes length and element_kind
+        atomically (issue 2346).
+
+        Bumped number of allowed variables per scope to 65535, to address GWT.
+        (Chromium issue 151625)
+
+        Support sourceURL for dynamically inserted scripts (issue 2342).
+
+        Performance and stability improvements on all platforms.
+
+
+2012-09-20: Version 3.14.0
+
+        Fixed missing slot recording during clearing of CallICs.
+        (Chromium issue 144230)
+
+        Fixed LBoundsCheck on x64 to handle (stack slot + constant) correctly.
+        (Chromium issue 150729)
+
+        Fixed minus zero test. (Issue 2133)
+
+        Fixed setting array length to zero for slow elements.
+        (Chromium issue 146910)
+
+        Fixed lost arguments dropping in HLeaveInlined.
+        (Chromium issue 150545)
+
+        Fixed casting error for receiver of interceptors.
+        (Chromium issue 149912)
+
+        Throw a more descriptive exception when blocking 'eval' via CSP.
+        (Chromium issue 140191)
+
+        Fixed debugger's eval when close to stack overflow. (issue 2318)
+
+        Added checks to live edit. (issue 2297)
+
+        Switched on code compaction on incremental GCs.
+
+        Fixed caching of optimized code for OSR. (issue 2326)
+
+        Not mask exception thrown by toString in String::UtfValue etc.
+        (issue 2317)
+
+        Fixed API check for length of external arrays. (Chromium issue 148896)
+
+        Ensure correct enumeration indices in the dict (Chromium issue 148376)
+
+        Correctly initialize regexp global cache. (Chromium issue 148378)
+
+        Fixed arguments object materialization during deopt. (issue 2261)
+
+        Introduced new API to expose external string resource regardless of
+        encoding.
+
+        Fixed CHECK failure in LCodeGen::DoWrapReceiver when
+        --deopt-every-n-times flag is present
+        (Chromium issue 148389)
+
+        Fixed edge case of extension with NULL as source string.
+        (Chromium issue 144649)
+
+        Fixed array index dehoisting. (Chromium issue 141395)
+
+        Performance and stability improvements on all platforms.
+
+
 2012-09-11: Version 3.13.7
 
         Enable/disable LiveEdit using the (C++) debug API.
diff --git a/deps/v8/DEPS b/deps/v8/DEPS
index e50d1d20f6..8d66960f2d 100644
--- a/deps/v8/DEPS
+++ b/deps/v8/DEPS
@@ -5,7 +5,7 @@
 deps = {
   # Remember to keep the revision in sync with the Makefile.
   "v8/build/gyp":
-    "http://gyp.googlecode.com/svn/trunk@1282",
+    "http://gyp.googlecode.com/svn/trunk@1501",
 }
 
 deps_os = {
diff --git a/deps/v8/Makefile b/deps/v8/Makefile
index f688f18b7c..b65ea4c9f9 100644
--- a/deps/v8/Makefile
+++ b/deps/v8/Makefile
@@ -24,14 +24,13 @@
 # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-PYTHON ?= python
 
 
 # Variable default definitions. Override them by exporting them in your shell.
 CXX ?= g++
 LINK ?= g++
 OUTDIR ?= out
-TESTJOBS ?= -j16
+TESTJOBS ?=
 GYPFLAGS ?=
 TESTFLAGS ?=
 ANDROID_NDK_ROOT ?=
@@ -59,6 +58,10 @@ endif
 ifeq ($(objectprint), on)
   GYPFLAGS += -Dv8_object_print=1
 endif
+# verifyheap=on
+ifeq ($(verifyheap), on)
+  GYPFLAGS += -Dv8_enable_verify_heap=1
+endif
 # snapshot=off
 ifeq ($(snapshot), off)
   GYPFLAGS += -Dv8_use_snapshot='false'
@@ -80,9 +83,9 @@ ifeq ($(liveobjectlist), on)
 endif
 # vfp3=off
 ifeq ($(vfp3), off)
-  GYPFLAGS += -Dv8_can_use_vfp_instructions=false
+  GYPFLAGS += -Dv8_can_use_vfp3_instructions=false
 else
-  GYPFLAGS += -Dv8_can_use_vfp_instructions=true
+  GYPFLAGS += -Dv8_can_use_vfp3_instructions=true
 endif
 # debuggersupport=off
 ifeq ($(debuggersupport), off)
@@ -113,8 +116,6 @@ ifeq ($(hardfp), on)
   GYPFLAGS += -Dv8_use_arm_eabi_hardfloat=true
 endif
 
-GYPFLAGS += "-Dpython=$(PYTHON)"
-
 # ----------------- available targets: --------------------
 # - "dependencies": pulls in external dependencies (currently: GYP)
 # - any arch listed in ARCHES (see below)
@@ -182,7 +183,7 @@ $(BUILDS): $(OUTDIR)/Makefile.$$(basename $$@)
 	@$(MAKE) -C "$(OUTDIR)" -f Makefile.$(basename $@) \
 	         CXX="$(CXX)" LINK="$(LINK)" \
 	         BUILDTYPE=$(shell echo $(subst .,,$(suffix $@)) | \
-	                     $(PYTHON) -c "print raw_input().capitalize()") \
+	                     python -c "print raw_input().capitalize()") \
 	         builddir="$(shell pwd)/$(OUTDIR)/$@"
 
 native: $(OUTDIR)/Makefile.native
@@ -202,20 +203,20 @@ $(ANDROID_BUILDS): $(GYPFILES) $(ENVFILE) build/android.gypi \
 
 # Test targets.
 check: all
-	@tools/test-wrapper-gypbuild.py $(TESTJOBS) --outdir=$(OUTDIR) \
+	@tools/run-tests.py $(TESTJOBS) --outdir=$(OUTDIR) \
 	    --arch=$(shell echo $(DEFAULT_ARCHES) | sed -e 's/ /,/g') \
 	    $(TESTFLAGS)
 
 $(addsuffix .check,$(MODES)): $$(basename $$@)
-	@tools/test-wrapper-gypbuild.py $(TESTJOBS) --outdir=$(OUTDIR) \
+	@tools/run-tests.py $(TESTJOBS) --outdir=$(OUTDIR) \
 	    --mode=$(basename $@) $(TESTFLAGS)
 
 $(addsuffix .check,$(ARCHES)): $$(basename $$@)
-	@tools/test-wrapper-gypbuild.py $(TESTJOBS) --outdir=$(OUTDIR) \
+	@tools/run-tests.py $(TESTJOBS) --outdir=$(OUTDIR) \
 	    --arch=$(basename $@) $(TESTFLAGS)
 
 $(CHECKS): $$(basename $$@)
-	@tools/test-wrapper-gypbuild.py $(TESTJOBS) --outdir=$(OUTDIR) \
+	@tools/run-tests.py $(TESTJOBS) --outdir=$(OUTDIR) \
 	    --arch-and-mode=$(basename $@) $(TESTFLAGS)
 
 $(addsuffix .sync, $(ANDROID_BUILDS)): $$(basename $$@)
@@ -223,16 +224,16 @@ $(addsuffix .sync, $(ANDROID_BUILDS)): $$(basename $$@)
 	                       $(shell pwd) $(ANDROID_V8)
 
 $(addsuffix .check, $(ANDROID_BUILDS)): $$(basename $$@).sync
-	@tools/test-wrapper-gypbuild.py $(TESTJOBS) --outdir=$(OUTDIR) \
+	@tools/run-tests.py $(TESTJOBS) --outdir=$(OUTDIR) \
 	     --arch-and-mode=$(basename $@) \
 	     --timeout=600 \
-	     --special-command="tools/android-run.py @"
+	     --command-prefix="tools/android-run.py"
 
 $(addsuffix .check, $(ANDROID_ARCHES)): \
                 $(addprefix $$(basename $$@).,$(MODES)).check
 
 native.check: native
-	@tools/test-wrapper-gypbuild.py $(TESTJOBS) --outdir=$(OUTDIR)/native \
+	@tools/run-tests.py $(TESTJOBS) --outdir=$(OUTDIR)/native \
 	    --arch-and-mode=. $(TESTFLAGS)
 
 # Clean targets. You can clean each architecture individually, or everything.
@@ -253,14 +254,14 @@ clean: $(addsuffix .clean, $(ARCHES) $(ANDROID_ARCHES)) native.clean
 OUT_MAKEFILES = $(addprefix $(OUTDIR)/Makefile.,$(ARCHES))
 $(OUT_MAKEFILES): $(GYPFILES) $(ENVFILE)
 	GYP_GENERATORS=make \
-	$(PYTHON) build/gyp/gyp --generator-output="$(OUTDIR)" build/all.gyp \
+	build/gyp/gyp --generator-output="$(OUTDIR)" build/all.gyp \
 	              -Ibuild/standalone.gypi --depth=. \
 	              -Dv8_target_arch=$(subst .,,$(suffix $@)) \
 	              -S.$(subst .,,$(suffix $@)) $(GYPFLAGS)
 
 $(OUTDIR)/Makefile.native: $(GYPFILES) $(ENVFILE)
 	GYP_GENERATORS=make \
-	$(PYTHON) build/gyp/gyp --generator-output="$(OUTDIR)" build/all.gyp \
+	build/gyp/gyp --generator-output="$(OUTDIR)" build/all.gyp \
 	              -Ibuild/standalone.gypi --depth=. -S.native $(GYPFLAGS)
 
 must-set-ANDROID_NDK_ROOT_OR_TOOLCHAIN:
@@ -283,6 +284,7 @@ $(ENVFILE).new:
 	    echo "CXX=$(CXX)" >> $(ENVFILE).new
 
 # Dependencies.
+# Remember to keep these in sync with the DEPS file.
 dependencies:
 	svn checkout --force http://gyp.googlecode.com/svn/trunk build/gyp \
-	    --revision 1282
+	    --revision 1501
diff --git a/deps/v8/Makefile.android b/deps/v8/Makefile.android
index a8d7fe148e..8e4ce0814a 100644
--- a/deps/v8/Makefile.android
+++ b/deps/v8/Makefile.android
@@ -48,11 +48,11 @@ endif
 ifeq ($(ARCH), android_arm)
   DEFINES  = target_arch=arm v8_target_arch=arm android_target_arch=arm
   DEFINES += arm_neon=0 armv7=1
-  TOOLCHAIN_ARCH = arm-linux-androideabi-4.4.3
+  TOOLCHAIN_ARCH = arm-linux-androideabi-4.6
 else
   ifeq ($(ARCH), android_ia32)
     DEFINES = target_arch=ia32 v8_target_arch=ia32 android_target_arch=x86
-    TOOLCHAIN_ARCH = x86-4.4.3
+    TOOLCHAIN_ARCH = x86-4.6
   else
     $(error Target architecture "${ARCH}" is not supported)
   endif
diff --git a/deps/v8/OWNERS b/deps/v8/OWNERS
new file mode 100644
index 0000000000..941e5fe07d
--- /dev/null
+++ b/deps/v8/OWNERS
@@ -0,0 +1,11 @@
+danno@chromium.org
+jkummerow@chromium.org
+mmassi@chromium.org
+mstarzinger@chromium.org
+mvstanton@chromium.org
+rossberg@chromium.org
+svenpanne@chromium.org
+ulan@chromium.org
+vegorov@chromium.org
+verwaest@chromium.org
+yangguo@chromium.org
diff --git a/deps/v8/PRESUBMIT.py b/deps/v8/PRESUBMIT.py
new file mode 100644
index 0000000000..0077be941a
--- /dev/null
+++ b/deps/v8/PRESUBMIT.py
@@ -0,0 +1,71 @@
+# Copyright 2012 the V8 project authors. All rights reserved.
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+#       notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+#       copyright notice, this list of conditions and the following
+#       disclaimer in the documentation and/or other materials provided
+#       with the distribution.
+#     * Neither the name of Google Inc. nor the names of its
+#       contributors may be used to endorse or promote products derived
+#       from this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+"""Top-level presubmit script for V8.
+
+See http://dev.chromium.org/developers/how-tos/depottools/presubmit-scripts
+for more details about the presubmit API built into gcl.
+"""
+
+def _V8PresubmitChecks(input_api, output_api):
+  """Runs the V8 presubmit checks."""
+  import sys
+  sys.path.append(input_api.os_path.join(
+        input_api.PresubmitLocalPath(), 'tools'))
+  from presubmit import CppLintProcessor
+  from presubmit import SourceProcessor
+
+  results = []
+  if not CppLintProcessor().Run(input_api.PresubmitLocalPath()):
+    results.append(output_api.PresubmitError("C++ lint check failed"))
+  if not SourceProcessor().Run(input_api.PresubmitLocalPath()):
+    results.append(output_api.PresubmitError(
+        "Copyright header and trailing whitespaces check failed"))
+  return results
+
+
+def _CommonChecks(input_api, output_api):
+  """Checks common to both upload and commit."""
+  results = []
+  results.extend(input_api.canned_checks.CheckOwners(
+      input_api, output_api, source_file_filter=None))
+  return results
+
+
+def CheckChangeOnUpload(input_api, output_api):
+  results = []
+  results.extend(_CommonChecks(input_api, output_api))
+  return results
+
+
+def CheckChangeOnCommit(input_api, output_api):
+  results = []
+  results.extend(_CommonChecks(input_api, output_api))
+  results.extend(input_api.canned_checks.CheckChangeHasDescription(
+      input_api, output_api))
+  results.extend(_V8PresubmitChecks(input_api, output_api))
+  return results
diff --git a/deps/v8/SConstruct b/deps/v8/SConstruct
index ebce7ff892..5f8616a6b8 100644
--- a/deps/v8/SConstruct
+++ b/deps/v8/SConstruct
@@ -59,7 +59,7 @@ LIBRARY_FLAGS = {
       'CPPDEFINES': ['V8_INTERPRETED_REGEXP']
     },
     'mode:debug': {
-      'CPPDEFINES': ['V8_ENABLE_CHECKS', 'OBJECT_PRINT']
+      'CPPDEFINES': ['V8_ENABLE_CHECKS', 'OBJECT_PRINT', 'VERIFY_HEAP']
     },
     'objectprint:on': {
       'CPPDEFINES':   ['OBJECT_PRINT'],
@@ -1157,6 +1157,11 @@ SIMPLE_OPTIONS = {
     'default': 'on',
     'help': 'use fpu instructions when building the snapshot [MIPS only]'
   },
+  'I_know_I_should_build_with_GYP': {
+    'values': ['yes', 'no'],
+    'default': 'no',
+    'help': 'grace period: temporarily override SCons deprecation'
+  }
 
 }
 
@@ -1257,7 +1262,35 @@ def IsLegal(env, option, values):
   return True
 
 
+def WarnAboutDeprecation():
+  print """
+    #####################################################################
+    #                                                                   #
+    #  LAST WARNING: Building V8 with SCons is deprecated.              #
+    #                                                                   #
+    #  This only works because you have overridden the kill switch.     #
+    #                                                                   #
+    #              MIGRATE TO THE GYP-BASED BUILD NOW!                  #
+    #                                                                   #
+    #  Instructions: http://code.google.com/p/v8/wiki/BuildingWithGYP.  #
+    #                                                                   #
+    #####################################################################
+  """
+
+
 def VerifyOptions(env):
+  if env['I_know_I_should_build_with_GYP'] != 'yes':
+    Abort("Building V8 with SCons is no longer supported. Please use GYP "
+          "instead; you can find instructions are at "
+          "http://code.google.com/p/v8/wiki/BuildingWithGYP.\n\n"
+          "Quitting.\n\n"
+          "For a limited grace period, you can specify "
+          "\"I_know_I_should_build_with_GYP=yes\" to override.")
+  else:
+    WarnAboutDeprecation()
+    import atexit
+    atexit.register(WarnAboutDeprecation)
+
   if not IsLegal(env, 'mode', ['debug', 'release']):
     return False
   if not IsLegal(env, 'sample', ["shell", "process", "lineprocessor"]):
@@ -1600,18 +1633,4 @@ try:
 except:
   pass
 
-
-def WarnAboutDeprecation():
-  print """
-#######################################################
-#  WARNING: Building V8 with SCons is deprecated and  #
-#  will not work much longer. Please switch to using  #
-#  the GYP-based build now. Instructions are at       #
-#  http://code.google.com/p/v8/wiki/BuildingWithGYP.  #
-#######################################################
-  """
-
-WarnAboutDeprecation()
-import atexit
-atexit.register(WarnAboutDeprecation)
 Build()
diff --git a/deps/v8/build/android.gypi b/deps/v8/build/android.gypi
index d2d1a35726..67a9d35820 100644
--- a/deps/v8/build/android.gypi
+++ b/deps/v8/build/android.gypi
@@ -122,8 +122,6 @@
         'ldflags': [
           '-nostdlib',
           '-Wl,--no-undefined',
-          # Don't export symbols from statically linked libraries.
-          '-Wl,--exclude-libs=ALL',
         ],
         'libraries!': [
             '-lrt',  # librt is built into Bionic.
@@ -219,6 +217,13 @@
           ['_type=="shared_library"', {
             'ldflags': [
               '-Wl,-shared,-Bsymbolic',
+              '<(android_lib)/crtbegin_so.o',
+            ],
+          }],
+          ['_type=="static_library"', {
+            'ldflags': [
+              # Don't export symbols from statically linked libraries.
+              '-Wl,--exclude-libs=ALL',
             ],
           }],
         ],
diff --git a/deps/v8/build/common.gypi b/deps/v8/build/common.gypi
index 44cab4d0cb..e68ee15fde 100644
--- a/deps/v8/build/common.gypi
+++ b/deps/v8/build/common.gypi
@@ -43,7 +43,7 @@
     # access is allowed for all CPUs.
     'v8_can_use_unaligned_accesses%': 'default',
 
-    # Setting 'v8_can_use_vfp_instructions' to 'true' will enable use of ARM VFP
+    # Setting 'v8_can_use_vfp2_instructions' to 'true' will enable use of ARM VFP
     # instructions in the V8 generated code. VFP instructions will be enabled
     # both for the snapshot and for the ARM target. Leaving the default value
     # of 'false' will avoid VFP instructions in the snapshot and use CPU feature
@@ -70,16 +70,15 @@
 
     'v8_enable_disassembler%': 0,
 
-    # Enable extra checks in API functions and other strategic places.
-    'v8_enable_extra_checks%': 1,
+    'v8_enable_gdbjit%': 0,
 
     'v8_object_print%': 0,
 
-    'v8_enable_gdbjit%': 0,
-
     # Enable profiling support. Only required on Windows.
     'v8_enable_prof%': 0,
 
+    'v8_enable_verify_heap%': 0,
+
     # Some versions of GCC 4.5 seem to need -fno-strict-aliasing.
     'v8_no_strict_aliasing%': 0,
 
@@ -103,9 +102,6 @@
     # Interpreted regexp engine exists as platform-independent alternative
     # based where the regular expression is compiled to a bytecode.
     'v8_interpreted_regexp%': 0,
-
-    # Name of the python executable.
-    'python%': 'python',
   },
   'target_defaults': {
     'conditions': [
@@ -115,14 +111,14 @@
       ['v8_enable_disassembler==1', {
         'defines': ['ENABLE_DISASSEMBLER',],
       }],
-      ['v8_enable_extra_checks==1', {
-        'defines': ['ENABLE_EXTRA_CHECKS',],
+      ['v8_enable_gdbjit==1', {
+        'defines': ['ENABLE_GDB_JIT_INTERFACE',],
       }],
       ['v8_object_print==1', {
         'defines': ['OBJECT_PRINT',],
       }],
-      ['v8_enable_gdbjit==1', {
-        'defines': ['ENABLE_GDB_JIT_INTERFACE',],
+      ['v8_enable_verify_heap==1', {
+        'defines': ['VERIFY_HEAP',],
       }],
       ['v8_interpreted_regexp==1', {
         'defines': ['V8_INTERPRETED_REGEXP',],
@@ -132,6 +128,11 @@
           'V8_TARGET_ARCH_ARM',
         ],
         'conditions': [
+          ['armv7==1', {
+            'defines': [
+              'CAN_USE_ARMV7_INSTRUCTIONS=1',
+            ],
+          }],
           [ 'v8_can_use_unaligned_accesses=="true"', {
             'defines': [
               'CAN_USE_UNALIGNED_ACCESSES=1',
@@ -142,12 +143,16 @@
               'CAN_USE_UNALIGNED_ACCESSES=0',
             ],
           }],
-          [ 'v8_can_use_vfp2_instructions=="true"', {
+          # NEON implies VFP3 and VFP3 implies VFP2.
+          [ 'v8_can_use_vfp2_instructions=="true" or arm_neon==1 or \
+             arm_fpu=="vfpv3" or arm_fpu=="vfpv3-d16"', {
             'defines': [
               'CAN_USE_VFP2_INSTRUCTIONS',
             ],
           }],
-          [ 'v8_can_use_vfp3_instructions=="true"', {
+          # NEON implies VFP3.
+          [ 'v8_can_use_vfp3_instructions=="true" or arm_neon==1 or \
+             arm_fpu=="vfpv3" or arm_fpu=="vfpv3-d16"', {
             'defines': [
               'CAN_USE_VFP3_INSTRUCTIONS',
             ],
@@ -198,10 +203,11 @@
                   ['mips_arch_variant=="mips32r2"', {
                     'cflags': ['-mips32r2', '-Wa,-mips32r2'],
                   }],
+                  ['mips_arch_variant=="mips32r1"', {
+                    'cflags': ['-mips32', '-Wa,-mips32'],
+                 }],
                   ['mips_arch_variant=="loongson"', {
                     'cflags': ['-mips3', '-Wa,-mips3'],
-                  }, {
-                    'cflags': ['-mips32', '-Wa,-mips32'],
                   }],
                 ],
               }],
@@ -274,7 +280,8 @@
           },
         },
       }],
-      ['OS in "linux freebsd dragonflybsd openbsd solaris netbsd".split()', {
+      ['OS=="linux" or OS=="freebsd" or OS=="openbsd" or OS=="solaris" \
+         or OS=="netbsd"', {
         'conditions': [
           [ 'v8_no_strict_aliasing==1', {
             'cflags': [ '-fno-strict-aliasing' ],
@@ -284,8 +291,8 @@
       ['OS=="solaris"', {
         'defines': [ '__C99FEATURES__=1' ],  # isinf() etc.
       }],
-      ['(OS=="linux" or OS=="freebsd" or OS=="dragonflybsd" or OS=="openbsd" \
-         or OS=="solaris" or OS=="netbsd" or OS=="mac" or OS=="android") and \
+      ['(OS=="linux" or OS=="freebsd" or OS=="openbsd" or OS=="solaris" \
+         or OS=="netbsd" or OS=="mac" or OS=="android") and \
         (v8_target_arch=="arm" or v8_target_arch=="ia32" or \
          v8_target_arch=="mipsel")', {
         # Check whether the host compiler and target compiler support the
@@ -304,16 +311,21 @@
           ['_toolset=="target"', {
             'variables': {
               'm32flag': '<!((echo | $(echo ${CXX_target:-${CXX:-$(which g++)}}) -m32 -E - > /dev/null 2>&1) && echo "-m32" || true)',
+              'clang%': 0,
             },
-            'cflags': [ '<(m32flag)' ],
-            'ldflags': [ '<(m32flag)' ],
+            'conditions': [
+              ['OS!="android" or clang==1', {
+                'cflags': [ '<(m32flag)' ],
+                'ldflags': [ '<(m32flag)' ],
+              }],
+            ],
             'xcode_settings': {
               'ARCHS': [ 'i386' ],
             },
           }],
         ],
       }],
-      ['OS=="freebsd" or OS=="dragonflybsd" or OS=="openbsd"', {
+      ['OS=="freebsd" or OS=="openbsd"', {
         'cflags': [ '-I/usr/local/include' ],
       }],
       ['OS=="netbsd"', {
@@ -322,11 +334,15 @@
     ],  # conditions
     'configurations': {
       'Debug': {
+        'variables': {
+          'v8_enable_extra_checks%': 1,
+        },
         'defines': [
           'DEBUG',
           'ENABLE_DISASSEMBLER',
           'V8_ENABLE_CHECKS',
           'OBJECT_PRINT',
+          'VERIFY_HEAP',
         ],
         'msvs_settings': {
           'VCCLCompilerTool': {
@@ -345,7 +361,10 @@
           },
         },
         'conditions': [
-          ['OS in "linux freebsd dragonflybsd openbsd netbsd".split()', {
+          ['v8_enable_extra_checks==1', {
+            'defines': ['ENABLE_EXTRA_CHECKS',],
+          }],
+          ['OS=="linux" or OS=="freebsd" or OS=="openbsd" or OS=="netbsd"', {
             'cflags': [ '-Wall', '<(werror)', '-W', '-Wno-unused-parameter',
                         '-Wnon-virtual-dtor', '-Woverloaded-virtual' ],
           }],
@@ -363,12 +382,32 @@
               }],
             ],
           }],
+          ['OS=="mac"', {
+            'xcode_settings': {
+              'GCC_OPTIMIZATION_LEVEL': '0',  # -O0
+            },
+          }],
         ],
       },  # Debug
       'Release': {
+        'variables': {
+          'v8_enable_extra_checks%': 0,
+        },
         'conditions': [
-          ['OS=="linux" or OS=="freebsd" or OS=="dragonflybsd" \
-            or OS=="openbsd" or OS=="netbsd" or OS=="android"', {
+          ['v8_enable_extra_checks==1', {
+            'defines': ['ENABLE_EXTRA_CHECKS',],
+          }],
+          ['OS=="linux" or OS=="freebsd" or OS=="openbsd" or OS=="netbsd" \
+            or OS=="android"', {
+            'cflags!': [
+              '-O2',
+              '-Os',
+            ],
+            'cflags': [
+              '-fdata-sections',
+              '-ffunction-sections',
+              '-O3',
+            ],
             'conditions': [
               [ 'gcc_version==44 and clang==0', {
                 'cflags': [
diff --git a/deps/v8/build/standalone.gypi b/deps/v8/build/standalone.gypi
index e6c7088997..7145a16e0c 100644
--- a/deps/v8/build/standalone.gypi
+++ b/deps/v8/build/standalone.gypi
@@ -38,7 +38,8 @@
       'variables': {
         'variables': {
           'conditions': [
-            ['OS!="win"', {
+            ['OS=="linux" or OS=="freebsd" or OS=="openbsd" or \
+               OS=="netbsd" or OS=="mac"', {
               # This handles the Unix platforms we generally deal with.
               # Anything else gets passed through, which probably won't work
               # very well; such hosts should pass an explicit target_arch
@@ -46,8 +47,9 @@
               'host_arch%':
                 '<!(uname -m | sed -e "s/i.86/ia32/;\
                   s/x86_64/x64/;s/amd64/x64/;s/arm.*/arm/;s/mips.*/mipsel/")',
-            }],
-            ['OS=="win"', {
+            }, {
+              # OS!="linux" and OS!="freebsd" and OS!="openbsd" and
+              # OS!="netbsd" and OS!="mac"
               'host_arch%': 'ia32',
             }],
           ],
@@ -87,7 +89,8 @@
     },
   },
   'conditions': [
-    ['OS!="win"', {
+    ['OS=="linux" or OS=="freebsd" or OS=="openbsd" or OS=="solaris" \
+       or OS=="netbsd"', {
       'target_defaults': {
         'cflags': [ '-Wall', '<(werror)', '-W', '-Wno-unused-parameter',
                     '-Wnon-virtual-dtor', '-pthread', '-fno-rtti',
@@ -106,6 +109,8 @@
         ],
       },
     }],
+    # 'OS=="linux" or OS=="freebsd" or OS=="openbsd" or OS=="solaris"
+    #  or OS=="netbsd"'
     ['OS=="win"', {
       'target_defaults': {
         'defines': [
diff --git a/deps/v8/include/v8-profiler.h b/deps/v8/include/v8-profiler.h
index c1e9a9e0b8..4d3597ac75 100644
--- a/deps/v8/include/v8-profiler.h
+++ b/deps/v8/include/v8-profiler.h
@@ -407,13 +407,28 @@ class V8EXPORT HeapProfiler {
   static const SnapshotObjectId kUnknownObjectId = 0;
 
   /**
+   * Callback interface for retrieving user friendly names of global objects.
+   */
+  class ObjectNameResolver {
+  public:
+    /**
+     * Returns name to be used in the heap snapshot for given node. Returned
+     * string must stay alive until snapshot collection is completed.
+     */
+    virtual const char* GetName(Handle<Object> object) = 0;
+  protected:
+    virtual ~ObjectNameResolver() {}
+  };
+
+  /**
    * Takes a heap snapshot and returns it. Title may be an empty string.
    * See HeapSnapshot::Type for types description.
    */
   static const HeapSnapshot* TakeSnapshot(
       Handle<String> title,
       HeapSnapshot::Type type = HeapSnapshot::kFull,
-      ActivityControl* control = NULL);
+      ActivityControl* control = NULL,
+      ObjectNameResolver* global_object_name_resolver = NULL);
 
   /**
    * Starts tracking of heap objects population statistics. After calling
diff --git a/deps/v8/include/v8.h b/deps/v8/include/v8.h
index ddde388cd4..f577e937a5 100644
--- a/deps/v8/include/v8.h
+++ b/deps/v8/include/v8.h
@@ -76,6 +76,22 @@
 
 #endif  // _WIN32
 
+#if defined(__GNUC__) && !defined(DEBUG)
+#define V8_INLINE(declarator) inline __attribute__((always_inline)) declarator
+#elif defined(_MSC_VER) && !defined(DEBUG)
+#define V8_INLINE(declarator) __forceinline declarator
+#else
+#define V8_INLINE(declarator) inline declarator
+#endif
+
+#if defined(__GNUC__) && !V8_DISABLE_DEPRECATIONS
+#define V8_DEPRECATED(declarator) declarator __attribute__ ((deprecated))
+#elif defined(_MSC_VER) && !V8_DISABLE_DEPRECATIONS
+#define V8_DEPRECATED(declarator) __declspec(deprecated) declarator
+#else
+#define V8_DEPRECATED(declarator) declarator
+#endif
+
 /**
  * The v8 JavaScript engine.
  */
@@ -176,12 +192,12 @@ template <class T> class Handle {
   /**
    * Creates an empty handle.
    */
-  inline Handle() : val_(0) {}
+  V8_INLINE(Handle()) : val_(0) {}
 
   /**
    * Creates a new handle for the specified value.
    */
-  inline explicit Handle(T* val) : val_(val) {}
+  V8_INLINE(explicit Handle(T* val)) : val_(val) {}
 
   /**
    * Creates a handle for the contents of the specified handle.  This
@@ -193,7 +209,7 @@ template <class T> class Handle {
    * Handle<String> to a variable declared as Handle<Value>, is legal
    * because String is a subclass of Value.
    */
-  template <class S> inline Handle(Handle<S> that)
+  template <class S> V8_INLINE(Handle(Handle<S> that))
       : val_(reinterpret_cast<T*>(*that)) {
     /**
      * This check fails when trying to convert between incompatible
@@ -206,16 +222,16 @@ template <class T> class Handle {
   /**
    * Returns true if the handle is empty.
    */
-  inline bool IsEmpty() const { return val_ == 0; }
+  V8_INLINE(bool IsEmpty() const) { return val_ == 0; }
 
   /**
    * Sets the handle to be empty. IsEmpty() will then return true.
    */
-  inline void Clear() { val_ = 0; }
+  V8_INLINE(void Clear()) { val_ = 0; }
 
-  inline T* operator->() const { return val_; }
+  V8_INLINE(T* operator->() const) { return val_; }
 
-  inline T* operator*() const { return val_; }
+  V8_INLINE(T* operator*() const) { return val_; }
 
   /**
    * Checks whether two handles are the same.
@@ -223,7 +239,7 @@ template <class T> class Handle {
    * to which they refer are identical.
    * The handles' references are not checked.
    */
-  template <class S> inline bool operator==(Handle<S> that) const {
+  template <class S> V8_INLINE(bool operator==(Handle<S> that) const) {
     internal::Object** a = reinterpret_cast<internal::Object**>(**this);
     internal::Object** b = reinterpret_cast<internal::Object**>(*that);
     if (a == 0) return b == 0;
@@ -237,11 +253,11 @@ template <class T> class Handle {
    * the objects to which they refer are different.
    * The handles' references are not checked.
    */
-  template <class S> inline bool operator!=(Handle<S> that) const {
+  template <class S> V8_INLINE(bool operator!=(Handle<S> that) const) {
     return !operator==(that);
   }
 
-  template <class S> static inline Handle<T> Cast(Handle<S> that) {
+  template <class S> V8_INLINE(static Handle<T> Cast(Handle<S> that)) {
 #ifdef V8_ENABLE_CHECKS
     // If we're going to perform the type check then we have to check
     // that the handle isn't empty before doing the checked cast.
@@ -250,7 +266,7 @@ template <class T> class Handle {
     return Handle<T>(T::Cast(*that));
   }
 
-  template <class S> inline Handle<S> As() {
+  template <class S> V8_INLINE(Handle<S> As()) {
     return Handle<S>::Cast(*this);
   }
 
@@ -268,8 +284,8 @@ template <class T> class Handle {
  */
 template <class T> class Local : public Handle<T> {
  public:
-  inline Local();
-  template <class S> inline Local(Local<S> that)
+  V8_INLINE(Local());
+  template <class S> V8_INLINE(Local(Local<S> that))
       : Handle<T>(reinterpret_cast<T*>(*that)) {
     /**
      * This check fails when trying to convert between incompatible
@@ -278,8 +294,8 @@ template <class T> class Local : public Handle<T> {
      */
     TYPE_CHECK(T, S);
   }
-  template <class S> inline Local(S* that) : Handle<T>(that) { }
-  template <class S> static inline Local<T> Cast(Local<S> that) {
+  template <class S> V8_INLINE(Local(S* that) : Handle<T>(that)) { }
+  template <class S> V8_INLINE(static Local<T> Cast(Local<S> that)) {
 #ifdef V8_ENABLE_CHECKS
     // If we're going to perform the type check then we have to check
     // that the handle isn't empty before doing the checked cast.
@@ -288,15 +304,17 @@ template <class T> class Local : public Handle<T> {
     return Local<T>(T::Cast(*that));
   }
 
-  template <class S> inline Local<S> As() {
+  template <class S> V8_INLINE(Local<S> As()) {
     return Local<S>::Cast(*this);
   }
 
-  /** Create a local handle for the content of another handle.
-   *  The referee is kept alive by the local handle even when
-   *  the original handle is destroyed/disposed.
+  /**
+   * Create a local handle for the content of another handle.
+   * The referee is kept alive by the local handle even when
+   * the original handle is destroyed/disposed.
    */
-  inline static Local<T> New(Handle<T> that);
+  V8_INLINE(static Local<T> New(Handle<T> that));
+  V8_INLINE(static Local<T> New(Isolate* isolate, Handle<T> that));
 };
 
 
@@ -323,7 +341,7 @@ template <class T> class Persistent : public Handle<T> {
    * Creates an empty persistent handle that doesn't point to any
    * storage cell.
    */
-  inline Persistent();
+  V8_INLINE(Persistent());
 
   /**
    * Creates a persistent handle for the same storage cell as the
@@ -336,7 +354,7 @@ template <class T> class Persistent : public Handle<T> {
    * Persistent<String> to a variable declared as Persistent<Value>,
    * is allowed as String is a subclass of Value.
    */
-  template <class S> inline Persistent(Persistent<S> that)
+  template <class S> V8_INLINE(Persistent(Persistent<S> that))
       : Handle<T>(reinterpret_cast<T*>(*that)) {
     /**
      * This check fails when trying to convert between incompatible
@@ -346,16 +364,16 @@ template <class T> class Persistent : public Handle<T> {
     TYPE_CHECK(T, S);
   }
 
-  template <class S> inline Persistent(S* that) : Handle<T>(that) { }
+  template <class S> V8_INLINE(Persistent(S* that)) : Handle<T>(that) { }
 
   /**
    * "Casts" a plain handle which is known to be a persistent handle
    * to a persistent handle.
    */
-  template <class S> explicit inline Persistent(Handle<S> that)
+  template <class S> explicit V8_INLINE(Persistent(Handle<S> that))
       : Handle<T>(*that) { }
 
-  template <class S> static inline Persistent<T> Cast(Persistent<S> that) {
+  template <class S> V8_INLINE(static Persistent<T> Cast(Persistent<S> that)) {
 #ifdef V8_ENABLE_CHECKS
     // If we're going to perform the type check then we have to check
     // that the handle isn't empty before doing the checked cast.
@@ -364,7 +382,7 @@ template <class T> class Persistent : public Handle<T> {
     return Persistent<T>(T::Cast(*that));
   }
 
-  template <class S> inline Persistent<S> As() {
+  template <class S> V8_INLINE(Persistent<S> As()) {
     return Persistent<S>::Cast(*this);
   }
 
@@ -372,7 +390,7 @@ template <class T> class Persistent : public Handle<T> {
    * Creates a new persistent handle for an existing local or
    * persistent handle.
    */
-  inline static Persistent<T> New(Handle<T> that);
+  V8_INLINE(static Persistent<T> New(Handle<T> that));
 
   /**
    * Releases the storage cell referenced by this persistent handle.
@@ -380,7 +398,8 @@ template <class T> class Persistent : public Handle<T> {
    * This handle's reference, and any other references to the storage
    * cell remain and IsEmpty will still return false.
    */
-  inline void Dispose();
+  V8_INLINE(void Dispose());
+  V8_INLINE(void Dispose(Isolate* isolate));
 
   /**
    * Make the reference to this object weak.  When only weak handles
@@ -388,10 +407,13 @@ template <class T> class Persistent : public Handle<T> {
    * callback to the given V8::WeakReferenceCallback function, passing
    * it the object reference and the given parameters.
    */
-  inline void MakeWeak(void* parameters, WeakReferenceCallback callback);
+  V8_INLINE(void MakeWeak(void* parameters, WeakReferenceCallback callback));
+  V8_INLINE(void MakeWeak(Isolate* isolate,
+                          void* parameters,
+                          WeakReferenceCallback callback));
 
-  /** Clears the weak reference to this object.*/
-  inline void ClearWeak();
+  /** Clears the weak reference to this object. */
+  V8_INLINE(void ClearWeak());
 
   /**
    * Marks the reference to this object independent. Garbage collector
@@ -400,23 +422,42 @@ template <class T> class Persistent : public Handle<T> {
    * assume that it will be preceded by a global GC prologue callback
    * or followed by a global GC epilogue callback.
    */
-  inline void MarkIndependent();
+  V8_INLINE(void MarkIndependent());
+  V8_INLINE(void MarkIndependent(Isolate* isolate));
 
   /**
-   *Checks if the handle holds the only reference to an object.
+   * Marks the reference to this object partially dependent. Partially
+   * dependent handles only depend on other partially dependent handles and
+   * these dependencies are provided through object groups. It provides a way
+   * to build smaller object groups for young objects that represent only a
+   * subset of all external dependencies. This mark is automatically cleared
+   * after each garbage collection.
    */
-  inline bool IsNearDeath() const;
+  V8_INLINE(void MarkPartiallyDependent());
+  V8_INLINE(void MarkPartiallyDependent(Isolate* isolate));
 
-  /**
-   * Returns true if the handle's reference is weak.
-   */
-  inline bool IsWeak() const;
+  /** Returns true if this handle was previously marked as independent. */
+  V8_INLINE(bool IsIndependent() const);
+  V8_INLINE(bool IsIndependent(Isolate* isolate) const);
+
+  /** Checks if the handle holds the only reference to an object. */
+  V8_INLINE(bool IsNearDeath() const);
+
+  /** Returns true if the handle's reference is weak.  */
+  V8_INLINE(bool IsWeak() const);
+  V8_INLINE(bool IsWeak(Isolate* isolate) const);
 
   /**
    * Assigns a wrapper class ID to the handle. See RetainedObjectInfo
    * interface description in v8-profiler.h for details.
    */
-  inline void SetWrapperClassId(uint16_t class_id);
+  V8_INLINE(void SetWrapperClassId(uint16_t class_id));
+
+  /**
+   * Returns the class ID previously assigned to this handle or 0 if no class
+   * ID was previously assigned.
+   */
+  V8_INLINE(uint16_t WrapperClassId() const);
 
  private:
   friend class ImplementationUtilities;
@@ -459,12 +500,14 @@ class V8EXPORT HandleScope {
    * Creates a new handle with the given value.
    */
   static internal::Object** CreateHandle(internal::Object* value);
+  static internal::Object** CreateHandle(internal::Isolate* isolate,
+                                         internal::Object* value);
   // Faster version, uses HeapObject to obtain the current Isolate.
   static internal::Object** CreateHandle(internal::HeapObject* value);
 
  private:
-  // Make it impossible to create heap-allocated or illegal handle
-  // scopes by disallowing certain operations.
+  // Make it hard to create heap-allocated or illegal handle scopes by
+  // disallowing certain operations.
   HandleScope(const HandleScope&);
   void operator=(const HandleScope&);
   void* operator new(size_t size);
@@ -477,7 +520,7 @@ class V8EXPORT HandleScope {
     internal::Object** next;
     internal::Object** limit;
     int level;
-    inline void Initialize() {
+    V8_INLINE(void Initialize()) {
       next = limit = NULL;
       level = 0;
     }
@@ -570,16 +613,16 @@ class V8EXPORT ScriptData {  // NOLINT
  */
 class ScriptOrigin {
  public:
-  inline ScriptOrigin(
+  V8_INLINE(ScriptOrigin(
       Handle<Value> resource_name,
       Handle<Integer> resource_line_offset = Handle<Integer>(),
-      Handle<Integer> resource_column_offset = Handle<Integer>())
+      Handle<Integer> resource_column_offset = Handle<Integer>()))
       : resource_name_(resource_name),
         resource_line_offset_(resource_line_offset),
         resource_column_offset_(resource_column_offset) { }
-  inline Handle<Value> ResourceName() const;
-  inline Handle<Integer> ResourceLineOffset() const;
-  inline Handle<Integer> ResourceColumnOffset() const;
+  V8_INLINE(Handle<Value> ResourceName() const);
+  V8_INLINE(Handle<Integer> ResourceLineOffset() const);
+  V8_INLINE(Handle<Integer> ResourceColumnOffset() const);
  private:
   Handle<Value> resource_name_;
   Handle<Integer> resource_line_offset_;
@@ -867,13 +910,13 @@ class Value : public Data {
    * Returns true if this value is the undefined value.  See ECMA-262
    * 4.3.10.
    */
-  inline bool IsUndefined() const;
+  V8_INLINE(bool IsUndefined() const);
 
   /**
    * Returns true if this value is the null value.  See ECMA-262
    * 4.3.11.
    */
-  inline bool IsNull() const;
+  V8_INLINE(bool IsNull() const);
 
    /**
    * Returns true if this value is true.
@@ -889,7 +932,7 @@ class Value : public Data {
    * Returns true if this value is an instance of the String type.
    * See ECMA-262 8.4.
    */
-  inline bool IsString() const;
+  V8_INLINE(bool IsString() const);
 
   /**
    * Returns true if this value is a function.
@@ -987,9 +1030,9 @@ class Value : public Data {
   V8EXPORT bool StrictEquals(Handle<Value> that) const;
 
  private:
-  inline bool QuickIsUndefined() const;
-  inline bool QuickIsNull() const;
-  inline bool QuickIsString() const;
+  V8_INLINE(bool QuickIsUndefined() const);
+  V8_INLINE(bool QuickIsNull() const);
+  V8_INLINE(bool QuickIsString() const);
   V8EXPORT bool FullIsUndefined() const;
   V8EXPORT bool FullIsNull() const;
   V8EXPORT bool FullIsString() const;
@@ -1009,7 +1052,7 @@ class Primitive : public Value { };
 class Boolean : public Primitive {
  public:
   V8EXPORT bool Value() const;
-  static inline Handle<Boolean> New(bool value);
+  V8_INLINE(static Handle<Boolean> New(bool value));
 };
 
 
@@ -1018,6 +1061,11 @@ class Boolean : public Primitive {
  */
 class String : public Primitive {
  public:
+  enum Encoding {
+    UNKNOWN_ENCODING = 0x1,
+    TWO_BYTE_ENCODING = 0x0,
+    ASCII_ENCODING = 0x4
+  };
   /**
    * Returns the number of characters in this string.
    */
@@ -1089,7 +1137,7 @@ class String : public Primitive {
    * A zero length string.
    */
   V8EXPORT static v8::Local<v8::String> Empty();
-  inline static v8::Local<v8::String> Empty(Isolate* isolate);
+  V8_INLINE(static v8::Local<v8::String> Empty(Isolate* isolate));
 
   /**
    * Returns true if the string is external
@@ -1181,10 +1229,18 @@ class String : public Primitive {
   };
 
   /**
+   * If the string is an external string, return the ExternalStringResourceBase
+   * regardless of the encoding, otherwise return NULL.  The encoding of the
+   * string is returned in encoding_out.
+   */
+  V8_INLINE(ExternalStringResourceBase* GetExternalStringResourceBase(
+      Encoding* encoding_out) const);
+
+  /**
    * Get the ExternalStringResource for an external string.  Returns
    * NULL if IsExternal() doesn't return true.
    */
-  inline ExternalStringResource* GetExternalStringResource() const;
+  V8_INLINE(ExternalStringResource* GetExternalStringResource() const);
 
   /**
    * Get the ExternalAsciiStringResource for an external ASCII string.
@@ -1193,7 +1249,7 @@ class String : public Primitive {
   V8EXPORT const ExternalAsciiStringResource* GetExternalAsciiStringResource()
       const;
 
-  static inline String* Cast(v8::Value* obj);
+  V8_INLINE(static String* Cast(v8::Value* obj));
 
   /**
    * Allocates a new string from either UTF-8 encoded or ASCII data.
@@ -1343,6 +1399,8 @@ class String : public Primitive {
   };
 
  private:
+  V8EXPORT void VerifyExternalStringResourceBase(ExternalStringResourceBase* v,
+                                                 Encoding encoding) const;
   V8EXPORT void VerifyExternalStringResource(ExternalStringResource* val) const;
   V8EXPORT static void CheckCast(v8::Value* obj);
 };
@@ -1355,7 +1413,7 @@ class Number : public Primitive {
  public:
   V8EXPORT double Value() const;
   V8EXPORT static Local<Number> New(double value);
-  static inline Number* Cast(v8::Value* obj);
+  V8_INLINE(static Number* Cast(v8::Value* obj));
  private:
   V8EXPORT Number();
   V8EXPORT static void CheckCast(v8::Value* obj);
@@ -1369,8 +1427,10 @@ class Integer : public Number {
  public:
   V8EXPORT static Local<Integer> New(int32_t value);
   V8EXPORT static Local<Integer> NewFromUnsigned(uint32_t value);
+  V8EXPORT static Local<Integer> New(int32_t value, Isolate*);
+  V8EXPORT static Local<Integer> NewFromUnsigned(uint32_t value, Isolate*);
   V8EXPORT int64_t Value() const;
-  static inline Integer* Cast(v8::Value* obj);
+  V8_INLINE(static Integer* Cast(v8::Value* obj));
  private:
   V8EXPORT Integer();
   V8EXPORT static void CheckCast(v8::Value* obj);
@@ -1565,16 +1625,42 @@ class Object : public Value {
 
   /** Gets the number of internal fields for this Object. */
   V8EXPORT int InternalFieldCount();
-  /** Gets the value in an internal field. */
-  inline Local<Value> GetInternalField(int index);
+
+  /** Gets the value from an internal field. */
+  V8_INLINE(Local<Value> GetInternalField(int index));
+
   /** Sets the value in an internal field. */
   V8EXPORT void SetInternalField(int index, Handle<Value> value);
 
-  /** Gets a native pointer from an internal field. */
-  inline void* GetPointerFromInternalField(int index);
+  /**
+   * Gets a native pointer from an internal field. Deprecated. If the pointer is
+   * always 2-byte-aligned, use GetAlignedPointerFromInternalField instead,
+   * otherwise use a combination of GetInternalField, External::Cast and
+   * External::Value.
+   */
+  V8EXPORT V8_DEPRECATED(void* GetPointerFromInternalField(int index));
+
+  /**
+   * Sets a native pointer in an internal field. Deprecated. If the pointer is
+   * always 2-byte aligned, use SetAlignedPointerInInternalField instead,
+   * otherwise use a combination of External::New and SetInternalField.
+   */
+  V8_DEPRECATED(V8_INLINE(void SetPointerInInternalField(int index,
+                                                         void* value)));
+
+  /**
+   * Gets a 2-byte-aligned native pointer from an internal field. This field
+   * must have been set by SetAlignedPointerInInternalField, everything else
+   * leads to undefined behavior.
+   */
+  V8_INLINE(void* GetAlignedPointerFromInternalField(int index));
 
-  /** Sets a native pointer in an internal field. */
-  V8EXPORT void SetPointerInInternalField(int index, void* value);
+  /**
+   * Sets a 2-byte-aligned native pointer in an internal field. To retrieve such
+   * a field, GetAlignedPointerFromInternalField must be used, everything else
+   * leads to undefined behavior.
+   */
+  V8EXPORT void SetAlignedPointerInInternalField(int index, void* value);
 
   // Testers for local properties.
   V8EXPORT bool HasOwnProperty(Handle<String> key);
@@ -1700,19 +1786,13 @@ class Object : public Value {
                                           Handle<Value> argv[]);
 
   V8EXPORT static Local<Object> New();
-  static inline Object* Cast(Value* obj);
+  V8_INLINE(static Object* Cast(Value* obj));
 
  private:
   V8EXPORT Object();
   V8EXPORT static void CheckCast(Value* obj);
-  V8EXPORT Local<Value> CheckedGetInternalField(int index);
-  V8EXPORT void* SlowGetPointerFromInternalField(int index);
-
-  /**
-   * If quick access to the internal field is possible this method
-   * returns the value.  Otherwise an empty handle is returned.
-   */
-  inline Local<Value> UncheckedGetInternalField(int index);
+  V8EXPORT Local<Value> SlowGetInternalField(int index);
+  V8EXPORT void* SlowGetAlignedPointerFromInternalField(int index);
 };
 
 
@@ -1735,7 +1815,7 @@ class Array : public Object {
    */
   V8EXPORT static Local<Array> New(int length = 0);
 
-  static inline Array* Cast(Value* obj);
+  V8_INLINE(static Array* Cast(Value* obj));
  private:
   V8EXPORT Array();
   V8EXPORT static void CheckCast(Value* obj);
@@ -1775,7 +1855,7 @@ class Function : public Object {
   V8EXPORT int GetScriptColumnNumber() const;
   V8EXPORT Handle<Value> GetScriptId() const;
   V8EXPORT ScriptOrigin GetScriptOrigin() const;
-  static inline Function* Cast(Value* obj);
+  V8_INLINE(static Function* Cast(Value* obj));
   V8EXPORT static const int kLineOffsetNotFound;
 
  private:
@@ -1797,7 +1877,7 @@ class Date : public Object {
    */
   V8EXPORT double NumberValue() const;
 
-  static inline Date* Cast(v8::Value* obj);
+  V8_INLINE(static Date* Cast(v8::Value* obj));
 
   /**
    * Notification that the embedder has changed the time zone,
@@ -1830,7 +1910,7 @@ class NumberObject : public Object {
    */
   V8EXPORT double NumberValue() const;
 
-  static inline NumberObject* Cast(v8::Value* obj);
+  V8_INLINE(static NumberObject* Cast(v8::Value* obj));
 
  private:
   V8EXPORT static void CheckCast(v8::Value* obj);
@@ -1849,7 +1929,7 @@ class BooleanObject : public Object {
    */
   V8EXPORT bool BooleanValue() const;
 
-  static inline BooleanObject* Cast(v8::Value* obj);
+  V8_INLINE(static BooleanObject* Cast(v8::Value* obj));
 
  private:
   V8EXPORT static void CheckCast(v8::Value* obj);
@@ -1868,7 +1948,7 @@ class StringObject : public Object {
    */
   V8EXPORT Local<String> StringValue() const;
 
-  static inline StringObject* Cast(v8::Value* obj);
+  V8_INLINE(static StringObject* Cast(v8::Value* obj));
 
  private:
   V8EXPORT static void CheckCast(v8::Value* obj);
@@ -1915,7 +1995,7 @@ class RegExp : public Object {
    */
   V8EXPORT Flags GetFlags() const;
 
-  static inline RegExp* Cast(v8::Value* obj);
+  V8_INLINE(static RegExp* Cast(v8::Value* obj));
 
  private:
   V8EXPORT static void CheckCast(v8::Value* obj);
@@ -1923,29 +2003,22 @@ class RegExp : public Object {
 
 
 /**
- * A JavaScript value that wraps a C++ void*.  This type of value is
- * mainly used to associate C++ data structures with JavaScript
- * objects.
- *
- * The Wrap function V8 will return the most optimal Value object wrapping the
- * C++ void*. The type of the value is not guaranteed to be an External object
- * and no assumptions about its type should be made. To access the wrapped
- * value Unwrap should be used, all other operations on that object will lead
- * to unpredictable results.
+ * A JavaScript value that wraps a C++ void*. This type of value is mainly used
+ * to associate C++ data structures with JavaScript objects.
  */
 class External : public Value {
  public:
-  V8EXPORT static Local<Value> Wrap(void* data);
-  static inline void* Unwrap(Handle<Value> obj);
+  /** Deprecated, use New instead. */
+  V8_DEPRECATED(V8_INLINE(static Local<Value> Wrap(void* value)));
+
+  /** Deprecated, use a combination of Cast and Value instead. */
+  V8_DEPRECATED(V8_INLINE(static void* Unwrap(Handle<Value> obj)));
 
   V8EXPORT static Local<External> New(void* value);
-  static inline External* Cast(Value* obj);
+  V8_INLINE(static External* Cast(Value* obj));
   V8EXPORT void* Value() const;
  private:
-  V8EXPORT External();
   V8EXPORT static void CheckCast(v8::Value* obj);
-  static inline void* QuickUnwrap(Handle<v8::Value> obj);
-  V8EXPORT static void* FullUnwrap(Handle<v8::Value> obj);
 };
 
 
@@ -1960,7 +2033,7 @@ class V8EXPORT Template : public Data {
   /** Adds a property to each instance created by this template.*/
   void Set(Handle<String> name, Handle<Data> value,
            PropertyAttribute attributes = None);
-  inline void Set(const char* name, Handle<Data> value);
+  V8_INLINE(void Set(const char* name, Handle<Data> value));
  private:
   Template();
 
@@ -1977,14 +2050,14 @@ class V8EXPORT Template : public Data {
  */
 class Arguments {
  public:
-  inline int Length() const;
-  inline Local<Value> operator[](int i) const;
-  inline Local<Function> Callee() const;
-  inline Local<Object> This() const;
-  inline Local<Object> Holder() const;
-  inline bool IsConstructCall() const;
-  inline Local<Value> Data() const;
-  inline Isolate* GetIsolate() const;
+  V8_INLINE(int Length() const);
+  V8_INLINE(Local<Value> operator[](int i) const);
+  V8_INLINE(Local<Function> Callee() const);
+  V8_INLINE(Local<Object> This() const);
+  V8_INLINE(Local<Object> Holder() const);
+  V8_INLINE(bool IsConstructCall() const);
+  V8_INLINE(Local<Value> Data() const);
+  V8_INLINE(Isolate* GetIsolate() const);
 
  private:
   static const int kIsolateIndex = 0;
@@ -1993,10 +2066,10 @@ class Arguments {
   static const int kHolderIndex = -3;
 
   friend class ImplementationUtilities;
-  inline Arguments(internal::Object** implicit_args,
+  V8_INLINE(Arguments(internal::Object** implicit_args,
                    internal::Object** values,
                    int length,
-                   bool is_construct_call);
+                   bool is_construct_call));
   internal::Object** implicit_args_;
   internal::Object** values_;
   int length_;
@@ -2010,12 +2083,12 @@ class Arguments {
  */
 class V8EXPORT AccessorInfo {
  public:
-  inline AccessorInfo(internal::Object** args)
+  V8_INLINE(AccessorInfo(internal::Object** args))
       : args_(args) { }
-  inline Isolate* GetIsolate() const;
-  inline Local<Value> Data() const;
-  inline Local<Object> This() const;
-  inline Local<Object> Holder() const;
+  V8_INLINE(Isolate* GetIsolate() const);
+  V8_INLINE(Local<Value> Data() const);
+  V8_INLINE(Local<Object> This() const);
+  V8_INLINE(Local<Object> Holder() const);
 
  private:
   internal::Object** args_;
@@ -2580,7 +2653,7 @@ void V8EXPORT RegisterExtension(Extension* extension);
  */
 class V8EXPORT DeclareExtension {
  public:
-  inline DeclareExtension(Extension* extension) {
+  V8_INLINE(DeclareExtension(Extension* extension)) {
     RegisterExtension(extension);
   }
 };
@@ -2594,10 +2667,10 @@ Handle<Primitive> V8EXPORT Null();
 Handle<Boolean> V8EXPORT True();
 Handle<Boolean> V8EXPORT False();
 
-inline Handle<Primitive> Undefined(Isolate* isolate);
-inline Handle<Primitive> Null(Isolate* isolate);
-inline Handle<Boolean> True(Isolate* isolate);
-inline Handle<Boolean> False(Isolate* isolate);
+V8_INLINE(Handle<Primitive> Undefined(Isolate* isolate));
+V8_INLINE(Handle<Primitive> Null(Isolate* isolate));
+V8_INLINE(Handle<Boolean> True(Isolate* isolate));
+V8_INLINE(Handle<Boolean> False(Isolate* isolate));
 
 
 /**
@@ -2638,7 +2711,7 @@ bool V8EXPORT SetResourceConstraints(ResourceConstraints* constraints);
 typedef void (*FatalErrorCallback)(const char* location, const char* message);
 
 
-typedef void (*MessageCallback)(Handle<Message> message, Handle<Value> data);
+typedef void (*MessageCallback)(Handle<Message> message, Handle<Value> error);
 
 
 /**
@@ -2751,6 +2824,7 @@ class V8EXPORT HeapStatistics {
   HeapStatistics();
   size_t total_heap_size() { return total_heap_size_; }
   size_t total_heap_size_executable() { return total_heap_size_executable_; }
+  size_t total_physical_size() { return total_physical_size_; }
   size_t used_heap_size() { return used_heap_size_; }
   size_t heap_size_limit() { return heap_size_limit_; }
 
@@ -2759,11 +2833,15 @@ class V8EXPORT HeapStatistics {
   void set_total_heap_size_executable(size_t size) {
     total_heap_size_executable_ = size;
   }
+  void set_total_physical_size(size_t size) {
+    total_physical_size_ = size;
+  }
   void set_used_heap_size(size_t size) { used_heap_size_ = size; }
   void set_heap_size_limit(size_t size) { heap_size_limit_ = size; }
 
   size_t total_heap_size_;
   size_t total_heap_size_executable_;
+  size_t total_physical_size_;
   size_t used_heap_size_;
   size_t heap_size_limit_;
 
@@ -2849,13 +2927,13 @@ class V8EXPORT Isolate {
   /**
    * Associate embedder-specific data with the isolate
    */
-  inline void SetData(void* data);
+  V8_INLINE(void SetData(void* data));
 
   /**
    * Retrieve embedder-specific data from the isolate.
    * Returns NULL if SetData has never been called.
    */
-  inline void* GetData();
+  V8_INLINE(void* GetData());
 
  private:
   Isolate();
@@ -2996,7 +3074,7 @@ typedef void (*JitCodeEventHandler)(const JitCodeEvent* event);
 
 
 /**
- * Interface for iterating though all external resources in the heap.
+ * Interface for iterating through all external resources in the heap.
  */
 class V8EXPORT ExternalResourceVisitor {  // NOLINT
  public:
@@ -3006,6 +3084,17 @@ class V8EXPORT ExternalResourceVisitor {  // NOLINT
 
 
 /**
+ * Interface for iterating through all the persistent handles in the heap.
+ */
+class V8EXPORT PersistentHandleVisitor {  // NOLINT
+ public:
+  virtual ~PersistentHandleVisitor() {}
+  virtual void VisitPersistentHandle(Persistent<Value> value,
+                                     uint16_t class_id) {}
+};
+
+
+/**
  * Container class for static utility functions.
  */
 class V8EXPORT V8 {
@@ -3070,8 +3159,7 @@ class V8EXPORT V8 {
    * The same message listener can be added more than once and in that
    * case it will be called more than once for each message.
    */
-  static bool AddMessageListener(MessageCallback that,
-                                 Handle<Value> data = Handle<Value>());
+  static bool AddMessageListener(MessageCallback that);
 
   /**
    * Remove all message listeners from the specified callback function.
@@ -3117,12 +3205,6 @@ class V8EXPORT V8 {
   static void SetCreateHistogramFunction(CreateHistogramCallback);
   static void SetAddHistogramSampleFunction(AddHistogramSampleCallback);
 
-  /**
-   * Enables the computation of a sliding window of states. The sliding
-   * window information is recorded in statistics counters.
-   */
-  static void EnableSlidingStateWindow();
-
   /** Callback function for reporting failed access checks.*/
   static void SetFailedAccessCheckCallbackFunction(FailedAccessCheckCallback);
 
@@ -3217,12 +3299,19 @@ class V8EXPORT V8 {
    * After each garbage collection, object groups are removed. It is
    * intended to be used in the before-garbage-collection callback
    * function, for instance to simulate DOM tree connections among JS
-   * wrapper objects.
+   * wrapper objects. Object groups for all dependent handles need to
+   * be provided for kGCTypeMarkSweepCompact collections, for all other
+   * garbage collection types it is sufficient to provide object groups
+   * for partially dependent handles only.
    * See v8-profiler.h for RetainedObjectInfo interface description.
    */
   static void AddObjectGroup(Persistent<Value>* objects,
                              size_t length,
                              RetainedObjectInfo* info = NULL);
+  static void AddObjectGroup(Isolate* isolate,
+                             Persistent<Value>* objects,
+                             size_t length,
+                             RetainedObjectInfo* info = NULL);
 
   /**
    * Allows the host application to declare implicit references between
@@ -3407,12 +3496,18 @@ class V8EXPORT V8 {
 
   /**
    * Iterates through all external resources referenced from current isolate
-   * heap. This method is not expected to be used except for debugging purposes
-   * and may be quite slow.
+   * heap.  GC is not invoked prior to iterating, therefore there is no
+   * guarantee that visited objects are still alive.
    */
   static void VisitExternalResources(ExternalResourceVisitor* visitor);
 
   /**
+   * Iterates through all the persistent handles in the current isolate's heap
+   * that have class_ids.
+   */
+  static void VisitHandlesWithClassIds(PersistentHandleVisitor* visitor);
+
+  /**
    * Optional notification that the embedder is idle.
    * V8 uses the notification to reduce memory footprint.
    * This call can be used repeatedly if the embedder remains idle.
@@ -3445,15 +3540,32 @@ class V8EXPORT V8 {
 
   static internal::Object** GlobalizeReference(internal::Object** handle);
   static void DisposeGlobal(internal::Object** global_handle);
+  static void DisposeGlobal(internal::Isolate* isolate,
+                            internal::Object** global_handle);
   static void MakeWeak(internal::Object** global_handle,
                        void* data,
                        WeakReferenceCallback);
+  static void MakeWeak(internal::Isolate* isolate,
+                       internal::Object** global_handle,
+                       void* data,
+                       WeakReferenceCallback);
   static void ClearWeak(internal::Object** global_handle);
   static void MarkIndependent(internal::Object** global_handle);
+  static void MarkIndependent(internal::Isolate* isolate,
+                              internal::Object** global_handle);
+  static void MarkPartiallyDependent(internal::Object** global_handle);
+  static void MarkPartiallyDependent(internal::Isolate* isolate,
+                                     internal::Object** global_handle);
+  static bool IsGlobalIndependent(internal::Object** global_handle);
+  static bool IsGlobalIndependent(internal::Isolate* isolate,
+                                  internal::Object** global_handle);
   static bool IsGlobalNearDeath(internal::Object** global_handle);
   static bool IsGlobalWeak(internal::Object** global_handle);
+  static bool IsGlobalWeak(internal::Isolate* isolate,
+                           internal::Object** global_handle);
   static void SetWrapperClassId(internal::Object** global_handle,
                                 uint16_t class_id);
+  static uint16_t GetWrapperClassId(internal::Object** global_handle);
 
   template <class T> friend class Handle;
   template <class T> friend class Local;
@@ -3468,7 +3580,9 @@ class V8EXPORT V8 {
 class V8EXPORT TryCatch {
  public:
   /**
-   * Creates a new try/catch block and registers it with v8.
+   * Creates a new try/catch block and registers it with v8.  Note that
+   * all TryCatch blocks should be stack allocated because the memory
+   * location itself is compared against JavaScript try/catch blocks.
    */
   TryCatch();
 
@@ -3558,6 +3672,12 @@ class V8EXPORT TryCatch {
   void SetCaptureMessage(bool value);
 
  private:
+  // Make it hard to create heap-allocated TryCatch blocks.
+  TryCatch(const TryCatch&);
+  void operator=(const TryCatch&);
+  void* operator new(size_t size);
+  void operator delete(void*, size_t);
+
   v8::internal::Isolate* isolate_;
   void* next_;
   void* exception_;
@@ -3699,12 +3819,45 @@ class V8EXPORT Context {
   static bool InContext();
 
   /**
-   * Associate an additional data object with the context. This is mainly used
-   * with the debugger to provide additional information on the context through
-   * the debugger API.
+   * Gets embedder data with index 0. Deprecated, use GetEmbedderData with index
+   * 0 instead.
    */
-  void SetData(Handle<String> data);
-  Local<Value> GetData();
+  V8_DEPRECATED(V8_INLINE(Local<Value> GetData()));
+
+  /**
+   * Sets embedder data with index 0. Deprecated, use SetEmbedderData with index
+   * 0 instead.
+   */
+  V8_DEPRECATED(V8_INLINE(void SetData(Handle<Value> value)));
+
+  /**
+   * Gets the embedder data with the given index, which must have been set by a
+   * previous call to SetEmbedderData with the same index. Note that index 0
+   * currently has a special meaning for Chrome's debugger.
+   */
+  V8_INLINE(Local<Value> GetEmbedderData(int index));
+
+  /**
+   * Sets the embedder data with the given index, growing the data as
+   * needed. Note that index 0 currently has a special meaning for Chrome's
+   * debugger.
+   */
+  void SetEmbedderData(int index, Handle<Value> value);
+
+  /**
+   * Gets a 2-byte-aligned native pointer from the embedder data with the given
+   * index, which must have bees set by a previous call to
+   * SetAlignedPointerInEmbedderData with the same index. Note that index 0
+   * currently has a special meaning for Chrome's debugger.
+   */
+  V8_INLINE(void* GetAlignedPointerFromEmbedderData(int index));
+
+  /**
+   * Sets a 2-byte-aligned native pointer in the embedder data with the given
+   * index, growing the data as needed. Note that index 0 currently has a
+   * special meaning for Chrome's debugger.
+   */
+  void SetAlignedPointerInEmbedderData(int index, void* value);
 
   /**
    * Control whether code generation from strings is allowed. Calling
@@ -3728,15 +3881,22 @@ class V8EXPORT Context {
   bool IsCodeGenerationFromStringsAllowed();
 
   /**
+   * Sets the error description for the exception that is thrown when
+   * code generation from strings is not allowed and 'eval' or the 'Function'
+   * constructor are called.
+   */
+  void SetErrorMessageForCodeGenerationFromStrings(Handle<String> message);
+
+  /**
    * Stack-allocated class which sets the execution context for all
    * operations executed within a local scope.
    */
   class Scope {
    public:
-    explicit inline Scope(Handle<Context> context) : context_(context) {
+    explicit V8_INLINE(Scope(Handle<Context> context)) : context_(context) {
       context_->Enter();
     }
-    inline ~Scope() { context_->Exit(); }
+    V8_INLINE(~Scope()) { context_->Exit(); }
    private:
     Handle<Context> context_;
   };
@@ -3746,6 +3906,9 @@ class V8EXPORT Context {
   friend class Script;
   friend class Object;
   friend class Function;
+
+  Local<Value> SlowGetEmbedderData(int index);
+  void* SlowGetAlignedPointerFromEmbedderData(int index);
 };
 
 
@@ -3974,47 +4137,27 @@ template <size_t ptr_size> struct SmiTagging;
 template <> struct SmiTagging<4> {
   static const int kSmiShiftSize = 0;
   static const int kSmiValueSize = 31;
-  static inline int SmiToInt(internal::Object* value) {
+  V8_INLINE(static int SmiToInt(internal::Object* value)) {
     int shift_bits = kSmiTagSize + kSmiShiftSize;
     // Throw away top 32 bits and shift down (requires >> to be sign extending).
     return static_cast<int>(reinterpret_cast<intptr_t>(value)) >> shift_bits;
   }
-
-  // For 32-bit systems any 2 bytes aligned pointer can be encoded as smi
-  // with a plain reinterpret_cast.
-  static const uintptr_t kEncodablePointerMask = 0x1;
-  static const int kPointerToSmiShift = 0;
 };
 
 // Smi constants for 64-bit systems.
 template <> struct SmiTagging<8> {
   static const int kSmiShiftSize = 31;
   static const int kSmiValueSize = 32;
-  static inline int SmiToInt(internal::Object* value) {
+  V8_INLINE(static int SmiToInt(internal::Object* value)) {
     int shift_bits = kSmiTagSize + kSmiShiftSize;
     // Shift down and throw away top 32 bits.
     return static_cast<int>(reinterpret_cast<intptr_t>(value) >> shift_bits);
   }
-
-  // To maximize the range of pointers that can be encoded
-  // in the available 32 bits, we require them to be 8 bytes aligned.
-  // This gives 2 ^ (32 + 3) = 32G address space covered.
-  // It might be not enough to cover stack allocated objects on some platforms.
-  static const int kPointerAlignment = 3;
-
-  static const uintptr_t kEncodablePointerMask =
-      ~(uintptr_t(0xffffffff) << kPointerAlignment);
-
-  static const int kPointerToSmiShift =
-      kSmiTagSize + kSmiShiftSize - kPointerAlignment;
 };
 
 typedef SmiTagging<kApiPointerSize> PlatformSmiTagging;
 const int kSmiShiftSize = PlatformSmiTagging::kSmiShiftSize;
 const int kSmiValueSize = PlatformSmiTagging::kSmiValueSize;
-const uintptr_t kEncodablePointerMask =
-    PlatformSmiTagging::kEncodablePointerMask;
-const int kPointerToSmiShift = PlatformSmiTagging::kPointerToSmiShift;
 
 /**
  * This class exports constants and functionality from within v8 that
@@ -4032,8 +4175,13 @@ class Internals {
   static const int kOddballKindOffset = 3 * kApiPointerSize;
   static const int kForeignAddressOffset = kApiPointerSize;
   static const int kJSObjectHeaderSize = 3 * kApiPointerSize;
+  static const int kFixedArrayHeaderSize = 2 * kApiPointerSize;
+  static const int kContextHeaderSize = 2 * kApiPointerSize;
+  static const int kContextEmbedderDataIndex = 54;
   static const int kFullStringRepresentationMask = 0x07;
+  static const int kStringEncodingMask = 0x4;
   static const int kExternalTwoByteRepresentationTag = 0x02;
+  static const int kExternalAsciiRepresentationTag = 0x06;
 
   static const int kIsolateStateOffset = 0;
   static const int kIsolateEmbedderDataOffset = 1 * kApiPointerSize;
@@ -4042,7 +4190,7 @@ class Internals {
   static const int kNullValueRootIndex = 7;
   static const int kTrueValueRootIndex = 8;
   static const int kFalseValueRootIndex = 9;
-  static const int kEmptySymbolRootIndex = 116;
+  static const int kEmptySymbolRootIndex = 119;
 
   static const int kJSObjectType = 0xaa;
   static const int kFirstNonstringType = 0x80;
@@ -4052,85 +4200,80 @@ class Internals {
   static const int kUndefinedOddballKind = 5;
   static const int kNullOddballKind = 3;
 
-  static inline bool HasHeapObjectTag(internal::Object* value) {
+  V8_INLINE(static bool HasHeapObjectTag(internal::Object* value)) {
     return ((reinterpret_cast<intptr_t>(value) & kHeapObjectTagMask) ==
             kHeapObjectTag);
   }
 
-  static inline bool HasSmiTag(internal::Object* value) {
-    return ((reinterpret_cast<intptr_t>(value) & kSmiTagMask) == kSmiTag);
-  }
-
-  static inline int SmiValue(internal::Object* value) {
+  V8_INLINE(static int SmiValue(internal::Object* value)) {
     return PlatformSmiTagging::SmiToInt(value);
   }
 
-  static inline int GetInstanceType(internal::Object* obj) {
+  V8_INLINE(static int GetInstanceType(internal::Object* obj)) {
     typedef internal::Object O;
     O* map = ReadField<O*>(obj, kHeapObjectMapOffset);
     return ReadField<uint8_t>(map, kMapInstanceTypeOffset);
   }
 
-  static inline int GetOddballKind(internal::Object* obj) {
+  V8_INLINE(static int GetOddballKind(internal::Object* obj)) {
     typedef internal::Object O;
     return SmiValue(ReadField<O*>(obj, kOddballKindOffset));
   }
 
-  static inline void* GetExternalPointerFromSmi(internal::Object* value) {
-    const uintptr_t address = reinterpret_cast<uintptr_t>(value);
-    return reinterpret_cast<void*>(address >> kPointerToSmiShift);
-  }
-
-  static inline void* GetExternalPointer(internal::Object* obj) {
-    if (HasSmiTag(obj)) {
-      return GetExternalPointerFromSmi(obj);
-    } else if (GetInstanceType(obj) == kForeignType) {
-      return ReadField<void*>(obj, kForeignAddressOffset);
-    } else {
-      return NULL;
-    }
-  }
-
-  static inline bool IsExternalTwoByteString(int instance_type) {
+  V8_INLINE(static bool IsExternalTwoByteString(int instance_type)) {
     int representation = (instance_type & kFullStringRepresentationMask);
     return representation == kExternalTwoByteRepresentationTag;
   }
 
-  static inline bool IsInitialized(v8::Isolate* isolate) {
+  V8_INLINE(static bool IsInitialized(v8::Isolate* isolate)) {
     uint8_t* addr = reinterpret_cast<uint8_t*>(isolate) + kIsolateStateOffset;
     return *reinterpret_cast<int*>(addr) == 1;
   }
 
-  static inline void SetEmbedderData(v8::Isolate* isolate, void* data) {
+  V8_INLINE(static void SetEmbedderData(v8::Isolate* isolate, void* data)) {
     uint8_t* addr = reinterpret_cast<uint8_t*>(isolate) +
         kIsolateEmbedderDataOffset;
     *reinterpret_cast<void**>(addr) = data;
   }
 
-  static inline void* GetEmbedderData(v8::Isolate* isolate) {
+  V8_INLINE(static void* GetEmbedderData(v8::Isolate* isolate)) {
     uint8_t* addr = reinterpret_cast<uint8_t*>(isolate) +
         kIsolateEmbedderDataOffset;
     return *reinterpret_cast<void**>(addr);
   }
 
-  static inline internal::Object** GetRoot(v8::Isolate* isolate, int index) {
+  V8_INLINE(static internal::Object** GetRoot(v8::Isolate* isolate,
+                                              int index)) {
     uint8_t* addr = reinterpret_cast<uint8_t*>(isolate) + kIsolateRootsOffset;
     return reinterpret_cast<internal::Object**>(addr + index * kApiPointerSize);
   }
 
   template <typename T>
-  static inline T ReadField(Object* ptr, int offset) {
+  V8_INLINE(static T ReadField(Object* ptr, int offset)) {
     uint8_t* addr = reinterpret_cast<uint8_t*>(ptr) + offset - kHeapObjectTag;
     return *reinterpret_cast<T*>(addr);
   }
 
-  static inline bool CanCastToHeapObject(void* o) { return false; }
-  static inline bool CanCastToHeapObject(Context* o) { return true; }
-  static inline bool CanCastToHeapObject(String* o) { return true; }
-  static inline bool CanCastToHeapObject(Object* o) { return true; }
-  static inline bool CanCastToHeapObject(Message* o) { return true; }
-  static inline bool CanCastToHeapObject(StackTrace* o) { return true; }
-  static inline bool CanCastToHeapObject(StackFrame* o) { return true; }
+  template <typename T>
+  V8_INLINE(static T ReadEmbedderData(Context* context, int index)) {
+    typedef internal::Object O;
+    typedef internal::Internals I;
+    O* ctx = *reinterpret_cast<O**>(context);
+    int embedder_data_offset = I::kContextHeaderSize +
+        (internal::kApiPointerSize * I::kContextEmbedderDataIndex);
+    O* embedder_data = I::ReadField<O*>(ctx, embedder_data_offset);
+    int value_offset =
+        I::kFixedArrayHeaderSize + (internal::kApiPointerSize * index);
+    return I::ReadField<T>(embedder_data, value_offset);
+  }
+
+  V8_INLINE(static bool CanCastToHeapObject(void* o)) { return false; }
+  V8_INLINE(static bool CanCastToHeapObject(Context* o)) { return true; }
+  V8_INLINE(static bool CanCastToHeapObject(String* o)) { return true; }
+  V8_INLINE(static bool CanCastToHeapObject(Object* o)) { return true; }
+  V8_INLINE(static bool CanCastToHeapObject(Message* o)) { return true; }
+  V8_INLINE(static bool CanCastToHeapObject(StackTrace* o)) { return true; }
+  V8_INLINE(static bool CanCastToHeapObject(StackFrame* o)) { return true; }
 };
 
 }  // namespace internal
@@ -4154,6 +4297,16 @@ Local<T> Local<T>::New(Handle<T> that) {
 
 
 template <class T>
+  Local<T> Local<T>::New(Isolate* isolate, Handle<T> that) {
+  if (that.IsEmpty()) return Local<T>();
+  T* that_ptr = *that;
+  internal::Object** p = reinterpret_cast<internal::Object**>(that_ptr);
+  return Local<T>(reinterpret_cast<T*>(HandleScope::CreateHandle(
+      reinterpret_cast<internal::Isolate*>(isolate), *p)));
+}
+
+
+template <class T>
 Persistent<T> Persistent<T>::New(Handle<T> that) {
   if (that.IsEmpty()) return Persistent<T>();
   internal::Object** p = reinterpret_cast<internal::Object**>(*that);
@@ -4162,6 +4315,21 @@ Persistent<T> Persistent<T>::New(Handle<T> that) {
 
 
 template <class T>
+bool Persistent<T>::IsIndependent() const {
+  if (this->IsEmpty()) return false;
+  return V8::IsGlobalIndependent(reinterpret_cast<internal::Object**>(**this));
+}
+
+
+template <class T>
+bool Persistent<T>::IsIndependent(Isolate* isolate) const {
+  if (this->IsEmpty()) return false;
+  return V8::IsGlobalIndependent(reinterpret_cast<internal::Isolate*>(isolate),
+                                 reinterpret_cast<internal::Object**>(**this));
+}
+
+
+template <class T>
 bool Persistent<T>::IsNearDeath() const {
   if (this->IsEmpty()) return false;
   return V8::IsGlobalNearDeath(reinterpret_cast<internal::Object**>(**this));
@@ -4176,6 +4344,14 @@ bool Persistent<T>::IsWeak() const {
 
 
 template <class T>
+bool Persistent<T>::IsWeak(Isolate* isolate) const {
+  if (this->IsEmpty()) return false;
+  return V8::IsGlobalWeak(reinterpret_cast<internal::Isolate*>(isolate),
+                          reinterpret_cast<internal::Object**>(**this));
+}
+
+
+template <class T>
 void Persistent<T>::Dispose() {
   if (this->IsEmpty()) return;
   V8::DisposeGlobal(reinterpret_cast<internal::Object**>(**this));
@@ -4183,6 +4359,14 @@ void Persistent<T>::Dispose() {
 
 
 template <class T>
+void Persistent<T>::Dispose(Isolate* isolate) {
+  if (this->IsEmpty()) return;
+  V8::DisposeGlobal(reinterpret_cast<internal::Isolate*>(isolate),
+                    reinterpret_cast<internal::Object**>(**this));
+}
+
+
+template <class T>
 Persistent<T>::Persistent() : Handle<T>() { }
 
 template <class T>
@@ -4193,6 +4377,15 @@ void Persistent<T>::MakeWeak(void* parameters, WeakReferenceCallback callback) {
 }
 
 template <class T>
+void Persistent<T>::MakeWeak(Isolate* isolate, void* parameters,
+                             WeakReferenceCallback callback) {
+  V8::MakeWeak(reinterpret_cast<internal::Isolate*>(isolate),
+               reinterpret_cast<internal::Object**>(**this),
+               parameters,
+               callback);
+}
+
+template <class T>
 void Persistent<T>::ClearWeak() {
   V8::ClearWeak(reinterpret_cast<internal::Object**>(**this));
 }
@@ -4203,10 +4396,32 @@ void Persistent<T>::MarkIndependent() {
 }
 
 template <class T>
+void Persistent<T>::MarkIndependent(Isolate* isolate) {
+  V8::MarkIndependent(reinterpret_cast<internal::Isolate*>(isolate),
+                      reinterpret_cast<internal::Object**>(**this));
+}
+
+template <class T>
+void Persistent<T>::MarkPartiallyDependent() {
+  V8::MarkPartiallyDependent(reinterpret_cast<internal::Object**>(**this));
+}
+
+template <class T>
+void Persistent<T>::MarkPartiallyDependent(Isolate* isolate) {
+  V8::MarkPartiallyDependent(reinterpret_cast<internal::Isolate*>(isolate),
+                             reinterpret_cast<internal::Object**>(**this));
+}
+
+template <class T>
 void Persistent<T>::SetWrapperClassId(uint16_t class_id) {
   V8::SetWrapperClassId(reinterpret_cast<internal::Object**>(**this), class_id);
 }
 
+template <class T>
+uint16_t Persistent<T>::WrapperClassId() const {
+  return V8::GetWrapperClassId(reinterpret_cast<internal::Object**>(**this));
+}
+
 Arguments::Arguments(internal::Object** implicit_args,
                      internal::Object** values, int length,
                      bool is_construct_call)
@@ -4293,63 +4508,40 @@ void Template::Set(const char* name, v8::Handle<Data> value) {
 
 Local<Value> Object::GetInternalField(int index) {
 #ifndef V8_ENABLE_CHECKS
-  Local<Value> quick_result = UncheckedGetInternalField(index);
-  if (!quick_result.IsEmpty()) return quick_result;
-#endif
-  return CheckedGetInternalField(index);
-}
-
-
-Local<Value> Object::UncheckedGetInternalField(int index) {
   typedef internal::Object O;
   typedef internal::Internals I;
   O* obj = *reinterpret_cast<O**>(this);
+  // Fast path: If the object is a plain JSObject, which is the common case, we
+  // know where to find the internal fields and can return the value directly.
   if (I::GetInstanceType(obj) == I::kJSObjectType) {
-    // If the object is a plain JSObject, which is the common case,
-    // we know where to find the internal fields and can return the
-    // value directly.
     int offset = I::kJSObjectHeaderSize + (internal::kApiPointerSize * index);
     O* value = I::ReadField<O*>(obj, offset);
     O** result = HandleScope::CreateHandle(value);
     return Local<Value>(reinterpret_cast<Value*>(result));
-  } else {
-    return Local<Value>();
   }
-}
-
-
-void* External::Unwrap(Handle<v8::Value> obj) {
-#ifdef V8_ENABLE_CHECKS
-  return FullUnwrap(obj);
-#else
-  return QuickUnwrap(obj);
 #endif
+  return SlowGetInternalField(index);
 }
 
 
-void* External::QuickUnwrap(Handle<v8::Value> wrapper) {
-  typedef internal::Object O;
-  O* obj = *reinterpret_cast<O**>(const_cast<v8::Value*>(*wrapper));
-  return internal::Internals::GetExternalPointer(obj);
+void Object::SetPointerInInternalField(int index, void* value) {
+  SetInternalField(index, External::New(value));
 }
 
 
-void* Object::GetPointerFromInternalField(int index) {
+void* Object::GetAlignedPointerFromInternalField(int index) {
+#ifndef V8_ENABLE_CHECKS
   typedef internal::Object O;
   typedef internal::Internals I;
-
   O* obj = *reinterpret_cast<O**>(this);
-
+  // Fast path: If the object is a plain JSObject, which is the common case, we
+  // know where to find the internal fields and can return the value directly.
   if (I::GetInstanceType(obj) == I::kJSObjectType) {
-    // If the object is a plain JSObject, which is the common case,
-    // we know where to find the internal fields and can return the
-    // value directly.
     int offset = I::kJSObjectHeaderSize + (internal::kApiPointerSize * index);
-    O* value = I::ReadField<O*>(obj, offset);
-    return I::GetExternalPointer(value);
+    return I::ReadField<void*>(obj, offset);
   }
-
-  return SlowGetPointerFromInternalField(index);
+#endif
+  return SlowGetAlignedPointerFromInternalField(index);
 }
 
 
@@ -4388,6 +4580,26 @@ String::ExternalStringResource* String::GetExternalStringResource() const {
 }
 
 
+String::ExternalStringResourceBase* String::GetExternalStringResourceBase(
+    String::Encoding* encoding_out) const {
+  typedef internal::Object O;
+  typedef internal::Internals I;
+  O* obj = *reinterpret_cast<O**>(const_cast<String*>(this));
+  int type = I::GetInstanceType(obj) & I::kFullStringRepresentationMask;
+  *encoding_out = static_cast<Encoding>(type & I::kStringEncodingMask);
+  ExternalStringResourceBase* resource = NULL;
+  if (type == I::kExternalAsciiRepresentationTag ||
+      type == I::kExternalTwoByteRepresentationTag) {
+    void* value = I::ReadField<void*>(obj, I::kStringResourceOffset);
+    resource = static_cast<ExternalStringResourceBase*>(value);
+  }
+#ifdef V8_ENABLE_CHECKS
+    VerifyExternalStringResourceBase(resource, *encoding_out);
+#endif
+  return resource;
+}
+
+
 bool Value::IsUndefined() const {
 #ifdef V8_ENABLE_CHECKS
   return FullIsUndefined();
@@ -4521,6 +4733,16 @@ Function* Function::Cast(v8::Value* value) {
 }
 
 
+Local<Value> External::Wrap(void* value) {
+  return External::New(value);
+}
+
+
+void* External::Unwrap(Handle<v8::Value> obj) {
+  return External::Cast(*obj)->Value();
+}
+
+
 External* External::Cast(v8::Value* value) {
 #ifdef V8_ENABLE_CHECKS
   CheckCast(value);
@@ -4597,6 +4819,37 @@ void* Isolate::GetData() {
 }
 
 
+Local<Value> Context::GetData() {
+  return GetEmbedderData(0);
+}
+
+void Context::SetData(Handle<Value> data) {
+  SetEmbedderData(0, data);
+}
+
+
+Local<Value> Context::GetEmbedderData(int index) {
+#ifndef V8_ENABLE_CHECKS
+  typedef internal::Object O;
+  typedef internal::Internals I;
+  O** result = HandleScope::CreateHandle(I::ReadEmbedderData<O*>(this, index));
+  return Local<Value>(reinterpret_cast<Value*>(result));
+#else
+  return SlowGetEmbedderData(index);
+#endif
+}
+
+
+void* Context::GetAlignedPointerFromEmbedderData(int index) {
+#ifndef V8_ENABLE_CHECKS
+  typedef internal::Internals I;
+  return I::ReadEmbedderData<void*>(this, index);
+#else
+  return SlowGetAlignedPointerFromEmbedderData(index);
+#endif
+}
+
+
 /**
  * \example shell.cc
  * A simple shell that takes a list of expressions on the
diff --git a/deps/v8/samples/shell.cc b/deps/v8/samples/shell.cc
index 821ef75a76..62f404554b 100644
--- a/deps/v8/samples/shell.cc
+++ b/deps/v8/samples/shell.cc
@@ -72,7 +72,7 @@ int main(int argc, char* argv[]) {
     v8::HandleScope handle_scope;
     v8::Persistent<v8::Context> context = CreateShellContext();
     if (context.IsEmpty()) {
-      printf("Error creating context\n");
+      fprintf(stderr, "Error creating context\n");
       return 1;
     }
     context->Enter();
@@ -226,7 +226,8 @@ int RunMain(int argc, char* argv[]) {
       // alone JavaScript engines.
       continue;
     } else if (strncmp(str, "--", 2) == 0) {
-      printf("Warning: unknown flag %s.\nTry --help for options\n", str);
+      fprintf(stderr,
+              "Warning: unknown flag %s.\nTry --help for options\n", str);
     } else if (strcmp(str, "-e") == 0 && i + 1 < argc) {
       // Execute argument given to -e option directly.
       v8::Handle<v8::String> file_name = v8::String::New("unnamed");
@@ -237,7 +238,7 @@ int RunMain(int argc, char* argv[]) {
       v8::Handle<v8::String> file_name = v8::String::New(str);
       v8::Handle<v8::String> source = ReadFile(str);
       if (source.IsEmpty()) {
-        printf("Error reading '%s'\n", str);
+        fprintf(stderr, "Error reading '%s'\n", str);
         continue;
       }
       if (!ExecuteString(source, file_name, false, true)) return 1;
@@ -249,20 +250,20 @@ int RunMain(int argc, char* argv[]) {
 
 // The read-eval-execute loop of the shell.
 void RunShell(v8::Handle<v8::Context> context) {
-  printf("V8 version %s [sample shell]\n", v8::V8::GetVersion());
+  fprintf(stderr, "V8 version %s [sample shell]\n", v8::V8::GetVersion());
   static const int kBufferSize = 256;
   // Enter the execution environment before evaluating any code.
   v8::Context::Scope context_scope(context);
   v8::Local<v8::String> name(v8::String::New("(shell)"));
   while (true) {
     char buffer[kBufferSize];
-    printf("> ");
+    fprintf(stderr, "> ");
     char* str = fgets(buffer, kBufferSize, stdin);
     if (str == NULL) break;
     v8::HandleScope handle_scope;
     ExecuteString(v8::String::New(str), name, true, true);
   }
-  printf("\n");
+  fprintf(stderr, "\n");
 }
 
 
@@ -310,31 +311,31 @@ void ReportException(v8::TryCatch* try_catch) {
   if (message.IsEmpty()) {
     // V8 didn't provide any extra information about this error; just
     // print the exception.
-    printf("%s\n", exception_string);
+    fprintf(stderr, "%s\n", exception_string);
   } else {
     // Print (filename):(line number): (message).
     v8::String::Utf8Value filename(message->GetScriptResourceName());
     const char* filename_string = ToCString(filename);
     int linenum = message->GetLineNumber();
-    printf("%s:%i: %s\n", filename_string, linenum, exception_string);
+    fprintf(stderr, "%s:%i: %s\n", filename_string, linenum, exception_string);
     // Print line of source code.
     v8::String::Utf8Value sourceline(message->GetSourceLine());
     const char* sourceline_string = ToCString(sourceline);
-    printf("%s\n", sourceline_string);
+    fprintf(stderr, "%s\n", sourceline_string);
     // Print wavy underline (GetUnderline is deprecated).
     int start = message->GetStartColumn();
     for (int i = 0; i < start; i++) {
-      printf(" ");
+      fprintf(stderr, " ");
     }
     int end = message->GetEndColumn();
     for (int i = start; i < end; i++) {
-      printf("^");
+      fprintf(stderr, "^");
     }
-    printf("\n");
+    fprintf(stderr, "\n");
     v8::String::Utf8Value stack_trace(try_catch->StackTrace());
     if (stack_trace.length() > 0) {
       const char* stack_trace_string = ToCString(stack_trace);
-      printf("%s\n", stack_trace_string);
+      fprintf(stderr, "%s\n", stack_trace_string);
     }
   }
 }
diff --git a/deps/v8/src/accessors.cc b/deps/v8/src/accessors.cc
index 9da6141c5b..efcaf8f294 100644
--- a/deps/v8/src/accessors.cc
+++ b/deps/v8/src/accessors.cc
@@ -42,15 +42,11 @@ namespace internal {
 
 
 template <class C>
-static C* FindInPrototypeChain(Object* obj, bool* found_it) {
-  ASSERT(!*found_it);
-  Heap* heap = HEAP;
-  while (!Is<C>(obj)) {
-    if (obj == heap->null_value()) return NULL;
-    obj = obj->GetPrototype();
+static C* FindInstanceOf(Object* obj) {
+  for (Object* cur = obj; !cur->IsNull(); cur = cur->GetPrototype()) {
+    if (Is<C>(cur)) return C::cast(cur);
   }
-  *found_it = true;
-  return C::cast(obj);
+  return NULL;
 }
 
 
@@ -81,10 +77,8 @@ MaybeObject* Accessors::ReadOnlySetAccessor(JSObject*, Object* value, void*) {
 
 MaybeObject* Accessors::ArrayGetLength(Object* object, void*) {
   // Traverse the prototype chain until we reach an array.
-  bool found_it = false;
-  JSArray* holder = FindInPrototypeChain<JSArray>(object, &found_it);
-  if (!found_it) return Smi::FromInt(0);
-  return holder->length();
+  JSArray* holder = FindInstanceOf<JSArray>(object);
+  return holder == NULL ? Smi::FromInt(0) : holder->length();
 }
 
 
@@ -118,7 +112,7 @@ MaybeObject* Accessors::ArraySetLength(JSObject* object, Object* value, void*) {
   HandleScope scope(isolate);
 
   // Protect raw pointers.
-  Handle<JSObject> object_handle(object, isolate);
+  Handle<JSArray> array_handle(JSArray::cast(object), isolate);
   Handle<Object> value_handle(value, isolate);
 
   bool has_exception;
@@ -128,7 +122,7 @@ MaybeObject* Accessors::ArraySetLength(JSObject* object, Object* value, void*) {
   if (has_exception) return Failure::Exception();
 
   if (uint32_v->Number() == number_v->Number()) {
-    return Handle<JSArray>::cast(object_handle)->SetElementsLength(*uint32_v);
+    return array_handle->SetElementsLength(*uint32_v);
   }
   return isolate->Throw(
       *isolate->factory()->NewRangeError("invalid_array_length",
@@ -448,15 +442,12 @@ const AccessorDescriptor Accessors::ScriptEvalFromFunctionName = {
 
 MaybeObject* Accessors::FunctionGetPrototype(Object* object, void*) {
   Heap* heap = Isolate::Current()->heap();
-  bool found_it = false;
-  JSFunction* function = FindInPrototypeChain<JSFunction>(object, &found_it);
-  if (!found_it) return heap->undefined_value();
+  JSFunction* function = FindInstanceOf<JSFunction>(object);
+  if (function == NULL) return heap->undefined_value();
   while (!function->should_have_prototype()) {
-    found_it = false;
-    function = FindInPrototypeChain<JSFunction>(object->GetPrototype(),
-                                                &found_it);
+    function = FindInstanceOf<JSFunction>(function->GetPrototype());
     // There has to be one because we hit the getter.
-    ASSERT(found_it);
+    ASSERT(function != NULL);
   }
 
   if (!function->has_prototype()) {
@@ -474,25 +465,46 @@ MaybeObject* Accessors::FunctionGetPrototype(Object* object, void*) {
 
 
 MaybeObject* Accessors::FunctionSetPrototype(JSObject* object,
-                                             Object* value,
+                                             Object* value_raw,
                                              void*) {
-  Heap* heap = object->GetHeap();
-  bool found_it = false;
-  JSFunction* function = FindInPrototypeChain<JSFunction>(object, &found_it);
-  if (!found_it) return heap->undefined_value();
-  if (!function->should_have_prototype()) {
+  Isolate* isolate = object->GetIsolate();
+  Heap* heap = isolate->heap();
+  JSFunction* function_raw = FindInstanceOf<JSFunction>(object);
+  if (function_raw == NULL) return heap->undefined_value();
+  if (!function_raw->should_have_prototype()) {
     // Since we hit this accessor, object will have no prototype property.
     return object->SetLocalPropertyIgnoreAttributes(heap->prototype_symbol(),
-                                                    value,
+                                                    value_raw,
                                                     NONE);
   }
 
-  Object* prototype;
-  { MaybeObject* maybe_prototype = function->SetPrototype(value);
-    if (!maybe_prototype->ToObject(&prototype)) return maybe_prototype;
+  HandleScope scope(isolate);
+  Handle<JSFunction> function(function_raw, isolate);
+  Handle<Object> value(value_raw, isolate);
+
+  Handle<Object> old_value;
+  bool is_observed =
+      FLAG_harmony_observation &&
+      *function == object &&
+      function->map()->is_observed();
+  if (is_observed) {
+    if (function->has_prototype())
+      old_value = handle(function->prototype(), isolate);
+    else
+      old_value = isolate->factory()->NewFunctionPrototype(function);
+  }
+
+  Handle<Object> result;
+  MaybeObject* maybe_result = function->SetPrototype(*value);
+  if (!maybe_result->ToHandle(&result, isolate)) return maybe_result;
+  ASSERT(function->prototype() == *value);
+
+  if (is_observed && !old_value->SameValue(*value)) {
+    JSObject::EnqueueChangeRecord(
+        function, "updated", isolate->factory()->prototype_symbol(), old_value);
   }
-  ASSERT(function->prototype() == value);
-  return function;
+
+  return *function;
 }
 
 
@@ -509,22 +521,20 @@ const AccessorDescriptor Accessors::FunctionPrototype = {
 
 
 MaybeObject* Accessors::FunctionGetLength(Object* object, void*) {
-  bool found_it = false;
-  JSFunction* function = FindInPrototypeChain<JSFunction>(object, &found_it);
-  if (!found_it) return Smi::FromInt(0);
+  JSFunction* function = FindInstanceOf<JSFunction>(object);
+  if (function == NULL) return Smi::FromInt(0);
   // Check if already compiled.
-  if (!function->shared()->is_compiled()) {
-    // If the function isn't compiled yet, the length is not computed
-    // correctly yet. Compile it now and return the right length.
-    HandleScope scope;
-    Handle<JSFunction> handle(function);
-    if (!JSFunction::CompileLazy(handle, KEEP_EXCEPTION)) {
-      return Failure::Exception();
-    }
-    return Smi::FromInt(handle->shared()->length());
-  } else {
+  if (function->shared()->is_compiled()) {
     return Smi::FromInt(function->shared()->length());
   }
+  // If the function isn't compiled yet, the length is not computed correctly
+  // yet. Compile it now and return the right length.
+  HandleScope scope;
+  Handle<JSFunction> handle(function);
+  if (JSFunction::CompileLazy(handle, KEEP_EXCEPTION)) {
+    return Smi::FromInt(handle->shared()->length());
+  }
+  return Failure::Exception();
 }
 
 
@@ -541,10 +551,8 @@ const AccessorDescriptor Accessors::FunctionLength = {
 
 
 MaybeObject* Accessors::FunctionGetName(Object* object, void*) {
-  bool found_it = false;
-  JSFunction* holder = FindInPrototypeChain<JSFunction>(object, &found_it);
-  if (!found_it) return HEAP->undefined_value();
-  return holder->shared()->name();
+  JSFunction* holder = FindInstanceOf<JSFunction>(object);
+  return holder == NULL ? HEAP->undefined_value() : holder->shared()->name();
 }
 
 
@@ -589,9 +597,8 @@ static MaybeObject* ConstructArgumentsObjectForInlinedFunction(
 MaybeObject* Accessors::FunctionGetArguments(Object* object, void*) {
   Isolate* isolate = Isolate::Current();
   HandleScope scope(isolate);
-  bool found_it = false;
-  JSFunction* holder = FindInPrototypeChain<JSFunction>(object, &found_it);
-  if (!found_it) return isolate->heap()->undefined_value();
+  JSFunction* holder = FindInstanceOf<JSFunction>(object);
+  if (holder == NULL) return isolate->heap()->undefined_value();
   Handle<JSFunction> function(holder, isolate);
 
   if (function->shared()->native()) return isolate->heap()->null_value();
@@ -664,19 +671,6 @@ const AccessorDescriptor Accessors::FunctionArguments = {
 //
 
 
-static MaybeObject* CheckNonStrictCallerOrThrow(
-    Isolate* isolate,
-    JSFunction* caller) {
-  DisableAssertNoAllocation enable_allocation;
-  if (!caller->shared()->is_classic_mode()) {
-    return isolate->Throw(
-        *isolate->factory()->NewTypeError("strict_caller",
-                                          HandleVector<Object>(NULL, 0)));
-  }
-  return caller;
-}
-
-
 class FrameFunctionIterator {
  public:
   FrameFunctionIterator(Isolate* isolate, const AssertNoAllocation& promise)
@@ -727,9 +721,8 @@ MaybeObject* Accessors::FunctionGetCaller(Object* object, void*) {
   Isolate* isolate = Isolate::Current();
   HandleScope scope(isolate);
   AssertNoAllocation no_alloc;
-  bool found_it = false;
-  JSFunction* holder = FindInPrototypeChain<JSFunction>(object, &found_it);
-  if (!found_it) return isolate->heap()->undefined_value();
+  JSFunction* holder = FindInstanceOf<JSFunction>(object);
+  if (holder == NULL) return isolate->heap()->undefined_value();
   if (holder->shared()->native()) return isolate->heap()->null_value();
   Handle<JSFunction> function(holder, isolate);
 
@@ -764,7 +757,14 @@ MaybeObject* Accessors::FunctionGetCaller(Object* object, void*) {
   if (caller->shared()->bound()) {
     return isolate->heap()->null_value();
   }
-  return CheckNonStrictCallerOrThrow(isolate, caller);
+  // Censor if the caller is not a classic mode function.
+  // Change from ES5, which used to throw, see:
+  // https://bugs.ecmascript.org/show_bug.cgi?id=310
+  if (!caller->shared()->is_classic_mode()) {
+    return isolate->heap()->null_value();
+  }
+
+  return caller;
 }
 
 
@@ -780,7 +780,7 @@ const AccessorDescriptor Accessors::FunctionCaller = {
 //
 
 
-MaybeObject* Accessors::ObjectGetPrototype(Object* receiver, void*) {
+static inline Object* GetPrototypeSkipHiddenPrototypes(Object* receiver) {
   Object* current = receiver->GetPrototype();
   while (current->IsJSObject() &&
          JSObject::cast(current)->map()->is_hidden_prototype()) {
@@ -790,12 +790,36 @@ MaybeObject* Accessors::ObjectGetPrototype(Object* receiver, void*) {
 }
 
 
-MaybeObject* Accessors::ObjectSetPrototype(JSObject* receiver,
-                                           Object* value,
+MaybeObject* Accessors::ObjectGetPrototype(Object* receiver, void*) {
+  return GetPrototypeSkipHiddenPrototypes(receiver);
+}
+
+
+MaybeObject* Accessors::ObjectSetPrototype(JSObject* receiver_raw,
+                                           Object* value_raw,
                                            void*) {
-  const bool skip_hidden_prototypes = true;
+  const bool kSkipHiddenPrototypes = true;
   // To be consistent with other Set functions, return the value.
-  return receiver->SetPrototype(value, skip_hidden_prototypes);
+  if (!(FLAG_harmony_observation && receiver_raw->map()->is_observed()))
+    return receiver_raw->SetPrototype(value_raw, kSkipHiddenPrototypes);
+
+  Isolate* isolate = receiver_raw->GetIsolate();
+  HandleScope scope(isolate);
+  Handle<JSObject> receiver(receiver_raw);
+  Handle<Object> value(value_raw);
+  Handle<Object> old_value(GetPrototypeSkipHiddenPrototypes(*receiver));
+
+  MaybeObject* result = receiver->SetPrototype(*value, kSkipHiddenPrototypes);
+  Handle<Object> hresult;
+  if (!result->ToHandle(&hresult, isolate)) return result;
+
+  Handle<Object> new_value(GetPrototypeSkipHiddenPrototypes(*receiver));
+  if (!new_value->SameValue(*old_value)) {
+    JSObject::EnqueueChangeRecord(receiver, "prototype",
+                                  isolate->factory()->Proto_symbol(),
+                                  old_value);
+  }
+  return *hresult;
 }
 
 
diff --git a/deps/v8/src/api.cc b/deps/v8/src/api.cc
index dcbc894574..95e5340a5a 100644
--- a/deps/v8/src/api.cc
+++ b/deps/v8/src/api.cc
@@ -630,7 +630,16 @@ void V8::MakeWeak(i::Object** object, void* parameters,
   i::Isolate* isolate = i::Isolate::Current();
   LOG_API(isolate, "MakeWeak");
   isolate->global_handles()->MakeWeak(object, parameters,
-                                                    callback);
+                                      callback);
+}
+
+
+void V8::MakeWeak(i::Isolate* isolate, i::Object** object,
+                  void* parameters, WeakReferenceCallback callback) {
+  ASSERT(isolate == i::Isolate::Current());
+  LOG_API(isolate, "MakeWeak");
+  isolate->global_handles()->MakeWeak(object, parameters,
+                                      callback);
 }
 
 
@@ -643,11 +652,48 @@ void V8::ClearWeak(i::Object** obj) {
 
 void V8::MarkIndependent(i::Object** object) {
   i::Isolate* isolate = i::Isolate::Current();
-  LOG_API(isolate, "MakeIndependent");
+  LOG_API(isolate, "MarkIndependent");
   isolate->global_handles()->MarkIndependent(object);
 }
 
 
+void V8::MarkIndependent(i::Isolate* isolate, i::Object** object) {
+  ASSERT(isolate == i::Isolate::Current());
+  LOG_API(isolate, "MarkIndependent");
+  isolate->global_handles()->MarkIndependent(object);
+}
+
+
+void V8::MarkPartiallyDependent(i::Object** object) {
+  i::Isolate* isolate = i::Isolate::Current();
+  LOG_API(isolate, "MarkPartiallyDependent");
+  isolate->global_handles()->MarkPartiallyDependent(object);
+}
+
+
+void V8::MarkPartiallyDependent(i::Isolate* isolate, i::Object** object) {
+  ASSERT(isolate == i::Isolate::Current());
+  LOG_API(isolate, "MarkPartiallyDependent");
+  isolate->global_handles()->MarkPartiallyDependent(object);
+}
+
+
+bool V8::IsGlobalIndependent(i::Object** obj) {
+  i::Isolate* isolate = i::Isolate::Current();
+  LOG_API(isolate, "IsGlobalIndependent");
+  if (!isolate->IsInitialized()) return false;
+  return i::GlobalHandles::IsIndependent(obj);
+}
+
+
+bool V8::IsGlobalIndependent(i::Isolate* isolate, i::Object** obj) {
+  ASSERT(isolate == i::Isolate::Current());
+  LOG_API(isolate, "IsGlobalIndependent");
+  if (!isolate->IsInitialized()) return false;
+  return i::GlobalHandles::IsIndependent(obj);
+}
+
+
 bool V8::IsGlobalNearDeath(i::Object** obj) {
   i::Isolate* isolate = i::Isolate::Current();
   LOG_API(isolate, "IsGlobalNearDeath");
@@ -664,6 +710,14 @@ bool V8::IsGlobalWeak(i::Object** obj) {
 }
 
 
+bool V8::IsGlobalWeak(i::Isolate* isolate, i::Object** obj) {
+  ASSERT(isolate == i::Isolate::Current());
+  LOG_API(isolate, "IsGlobalWeak");
+  if (!isolate->IsInitialized()) return false;
+  return i::GlobalHandles::IsWeak(obj);
+}
+
+
 void V8::DisposeGlobal(i::Object** obj) {
   i::Isolate* isolate = i::Isolate::Current();
   LOG_API(isolate, "DisposeGlobal");
@@ -671,6 +725,14 @@ void V8::DisposeGlobal(i::Object** obj) {
   isolate->global_handles()->Destroy(obj);
 }
 
+
+void V8::DisposeGlobal(i::Isolate* isolate, i::Object** obj) {
+  ASSERT(isolate == i::Isolate::Current());
+  LOG_API(isolate, "DisposeGlobal");
+  if (!isolate->IsInitialized()) return;
+  isolate->global_handles()->Destroy(obj);
+}
+
 // --- H a n d l e s ---
 
 
@@ -724,6 +786,12 @@ i::Object** HandleScope::CreateHandle(i::Object* value) {
 }
 
 
+i::Object** HandleScope::CreateHandle(i::Isolate* isolate, i::Object* value) {
+  ASSERT(isolate == i::Isolate::Current());
+  return i::HandleScope::CreateHandle(value, isolate);
+}
+
+
 i::Object** HandleScope::CreateHandle(i::HeapObject* value) {
   ASSERT(value->IsHeapObject());
   return reinterpret_cast<i::Object**>(
@@ -765,36 +833,77 @@ void Context::Exit() {
 }
 
 
-void Context::SetData(v8::Handle<String> data) {
-  i::Handle<i::Context> env = Utils::OpenHandle(this);
-  i::Isolate* isolate = env->GetIsolate();
-  if (IsDeadCheck(isolate, "v8::Context::SetData()")) return;
-  i::Handle<i::Object> raw_data = Utils::OpenHandle(*data);
-  ASSERT(env->IsNativeContext());
-  if (env->IsNativeContext()) {
-    env->set_data(*raw_data);
-  }
+static void* DecodeSmiToAligned(i::Object* value, const char* location) {
+  ApiCheck(value->IsSmi(), location, "Not a Smi");
+  return reinterpret_cast<void*>(value);
 }
 
 
-v8::Local<v8::Value> Context::GetData() {
-  i::Handle<i::Context> env = Utils::OpenHandle(this);
-  i::Isolate* isolate = env->GetIsolate();
-  if (IsDeadCheck(isolate, "v8::Context::GetData()")) {
-    return v8::Local<Value>();
-  }
-  i::Object* raw_result = NULL;
-  ASSERT(env->IsNativeContext());
-  if (env->IsNativeContext()) {
-    raw_result = env->data();
-  } else {
-    return Local<Value>();
+static i::Smi* EncodeAlignedAsSmi(void* value, const char* location) {
+  i::Smi* smi = reinterpret_cast<i::Smi*>(value);
+  ApiCheck(smi->IsSmi(), location, "Pointer is not aligned");
+  return smi;
+}
+
+
+static i::Handle<i::FixedArray> EmbedderDataFor(Context* context,
+                                                int index,
+                                                bool can_grow,
+                                                const char* location) {
+  i::Handle<i::Context> env = Utils::OpenHandle(context);
+  bool ok = !IsDeadCheck(env->GetIsolate(), location) &&
+      ApiCheck(env->IsNativeContext(), location, "Not a native context") &&
+      ApiCheck(index >= 0, location, "Negative index");
+  if (!ok) return i::Handle<i::FixedArray>();
+  i::Handle<i::FixedArray> data(env->embedder_data());
+  if (index < data->length()) return data;
+  if (!can_grow) {
+    Utils::ReportApiFailure(location, "Index too large");
+    return i::Handle<i::FixedArray>();
   }
-  i::Handle<i::Object> result(raw_result, isolate);
+  int new_size = i::Max(index, data->length() << 1) + 1;
+  data = env->GetIsolate()->factory()->CopySizeFixedArray(data, new_size);
+  env->set_embedder_data(*data);
+  return data;
+}
+
+
+v8::Local<v8::Value> Context::SlowGetEmbedderData(int index) {
+  const char* location = "v8::Context::GetEmbedderData()";
+  i::Handle<i::FixedArray> data = EmbedderDataFor(this, index, false, location);
+  if (data.is_null()) return Local<Value>();
+  i::Handle<i::Object> result(data->get(index), data->GetIsolate());
   return Utils::ToLocal(result);
 }
 
 
+void Context::SetEmbedderData(int index, v8::Handle<Value> value) {
+  const char* location = "v8::Context::SetEmbedderData()";
+  i::Handle<i::FixedArray> data = EmbedderDataFor(this, index, true, location);
+  if (data.is_null()) return;
+  i::Handle<i::Object> val = Utils::OpenHandle(*value);
+  data->set(index, *val);
+  ASSERT_EQ(*Utils::OpenHandle(*value),
+            *Utils::OpenHandle(*GetEmbedderData(index)));
+}
+
+
+void* Context::SlowGetAlignedPointerFromEmbedderData(int index) {
+  const char* location = "v8::Context::GetAlignedPointerFromEmbedderData()";
+  i::Handle<i::FixedArray> data = EmbedderDataFor(this, index, false, location);
+  if (data.is_null()) return NULL;
+  return DecodeSmiToAligned(data->get(index), location);
+}
+
+
+void Context::SetAlignedPointerInEmbedderData(int index, void* value) {
+  const char* location = "v8::Context::SetAlignedPointerInEmbedderData()";
+  i::Handle<i::FixedArray> data = EmbedderDataFor(this, index, true, location);
+  data->set(index, EncodeAlignedAsSmi(value, location));
+  ASSERT_EQ(value, GetAlignedPointerFromEmbedderData(index));
+}
+
+
 i::Object** v8::HandleScope::RawClose(i::Object** value) {
   if (!ApiCheck(!is_closed_,
                 "v8::HandleScope::Close()",
@@ -816,7 +925,7 @@ i::Object** v8::HandleScope::RawClose(i::Object** value) {
   }
 
   // Allocate a new handle on the previous handle block.
-  i::Handle<i::Object> handle(result);
+  i::Handle<i::Object> handle(result, isolate_);
   return handle.location();
 }
 
@@ -1151,7 +1260,7 @@ void FunctionTemplate::SetHiddenPrototype(bool value) {
 
 void FunctionTemplate::ReadOnlyPrototype() {
   i::Isolate* isolate = Utils::OpenHandle(this)->GetIsolate();
-  if (IsDeadCheck(isolate, "v8::FunctionTemplate::SetPrototypeAttributes()")) {
+  if (IsDeadCheck(isolate, "v8::FunctionTemplate::ReadOnlyPrototype()")) {
     return;
   }
   ENTER_V8(isolate);
@@ -1595,6 +1704,8 @@ Local<Value> Script::Run() {
   ON_BAILOUT(isolate, "v8::Script::Run()", return Local<Value>());
   LOG_API(isolate, "Script::Run");
   ENTER_V8(isolate);
+  i::Logger::TimerEventScope timer_scope(
+      isolate, i::Logger::TimerEventScope::v8_execute);
   i::Object* raw_result = NULL;
   {
     i::HandleScope scope(isolate);
@@ -2193,7 +2304,7 @@ bool Value::IsExternal() const {
   if (IsDeadCheck(i::Isolate::Current(), "v8::Value::IsExternal()")) {
     return false;
   }
-  return Utils::OpenHandle(this)->IsForeign();
+  return Utils::OpenHandle(this)->IsExternal();
 }
 
 
@@ -2267,7 +2378,11 @@ static i::Object* LookupBuiltin(i::Isolate* isolate,
 static bool CheckConstructor(i::Isolate* isolate,
                              i::Handle<i::JSObject> obj,
                              const char* class_name) {
-  return obj->map()->constructor() == LookupBuiltin(isolate, class_name);
+  i::Object* constr = obj->map()->constructor();
+  if (!constr->IsJSFunction()) return false;
+  i::JSFunction* func = i::JSFunction::cast(constr);
+  return func->shared()->native() &&
+         constr == LookupBuiltin(isolate, class_name);
 }
 
 
@@ -2422,8 +2537,7 @@ Local<Integer> Value::ToInteger() const {
 
 void External::CheckCast(v8::Value* that) {
   if (IsDeadCheck(i::Isolate::Current(), "v8::External::Cast()")) return;
-  i::Handle<i::Object> obj = Utils::OpenHandle(that);
-  ApiCheck(obj->IsForeign(),
+  ApiCheck(Utils::OpenHandle(that)->IsExternal(),
            "v8::External::Cast()",
            "Could not convert to external");
 }
@@ -2768,6 +2882,7 @@ bool v8::Object::Set(v8::Handle<Value> key, v8::Handle<Value> value,
   i::Handle<i::Object> value_obj = Utils::OpenHandle(*value);
   EXCEPTION_PREAMBLE(isolate);
   i::Handle<i::Object> obj = i::SetProperty(
+      isolate,
       self,
       key_obj,
       value_obj,
@@ -3322,7 +3437,7 @@ v8::Local<v8::Value> v8::Object::GetHiddenValue(v8::Handle<v8::String> key) {
   i::Handle<i::JSObject> self = Utils::OpenHandle(this);
   i::Handle<i::String> key_obj = Utils::OpenHandle(*key);
   i::Handle<i::String> key_symbol = FACTORY->LookupSymbol(key_obj);
-  i::Handle<i::Object> result(self->GetHiddenProperty(*key_symbol));
+  i::Handle<i::Object> result(self->GetHiddenProperty(*key_symbol), isolate);
   if (result->IsUndefined()) return v8::Local<v8::Value>();
   return Utils::ToLocal(result);
 }
@@ -3559,6 +3674,8 @@ Local<v8::Value> Object::CallAsFunction(v8::Handle<v8::Object> recv,
              return Local<v8::Value>());
   LOG_API(isolate, "Object::CallAsFunction");
   ENTER_V8(isolate);
+  i::Logger::TimerEventScope timer_scope(
+      isolate, i::Logger::TimerEventScope::v8_execute);
   i::HandleScope scope(isolate);
   i::Handle<i::JSObject> obj = Utils::OpenHandle(this);
   i::Handle<i::Object> recv_obj = Utils::OpenHandle(*recv);
@@ -3590,6 +3707,8 @@ Local<v8::Value> Object::CallAsConstructor(int argc,
              return Local<v8::Object>());
   LOG_API(isolate, "Object::CallAsConstructor");
   ENTER_V8(isolate);
+  i::Logger::TimerEventScope timer_scope(
+      isolate, i::Logger::TimerEventScope::v8_execute);
   i::HandleScope scope(isolate);
   i::Handle<i::JSObject> obj = Utils::OpenHandle(this);
   STATIC_ASSERT(sizeof(v8::Handle<v8::Value>) == sizeof(i::Object**));
@@ -3632,6 +3751,8 @@ Local<v8::Object> Function::NewInstance(int argc,
              return Local<v8::Object>());
   LOG_API(isolate, "Function::NewInstance");
   ENTER_V8(isolate);
+  i::Logger::TimerEventScope timer_scope(
+      isolate, i::Logger::TimerEventScope::v8_execute);
   HandleScope scope;
   i::Handle<i::JSFunction> function = Utils::OpenHandle(this);
   STATIC_ASSERT(sizeof(v8::Handle<v8::Value>) == sizeof(i::Object**));
@@ -3650,6 +3771,8 @@ Local<v8::Value> Function::Call(v8::Handle<v8::Object> recv, int argc,
   ON_BAILOUT(isolate, "v8::Function::Call()", return Local<v8::Value>());
   LOG_API(isolate, "Function::Call");
   ENTER_V8(isolate);
+  i::Logger::TimerEventScope timer_scope(
+      isolate, i::Logger::TimerEventScope::v8_execute);
   i::Object* raw_result = NULL;
   {
     i::HandleScope scope(isolate);
@@ -3693,8 +3816,9 @@ ScriptOrigin Function::GetScriptOrigin() const {
   i::Handle<i::JSFunction> func = Utils::OpenHandle(this);
   if (func->shared()->script()->IsScript()) {
     i::Handle<i::Script> script(i::Script::cast(func->shared()->script()));
+    i::Handle<i::Object> scriptName = GetScriptNameOrSourceURL(script);
     v8::ScriptOrigin origin(
-      Utils::ToLocal(i::Handle<i::Object>(script->name())),
+      Utils::ToLocal(scriptName),
       v8::Integer::New(script->line_offset()->value()),
       v8::Integer::New(script->column_offset()->value()));
     return origin;
@@ -3757,7 +3881,7 @@ static int RecursivelySerializeToUtf8(i::String* string,
                                       int32_t* last_character) {
   int utf8_bytes = 0;
   while (true) {
-    if (string->IsAsciiRepresentation()) {
+    if (string->IsOneByteRepresentation()) {
       i::String::WriteToFlat(string, buffer, start, end);
       *last_character = unibrow::Utf16::kNoPreviousCharacter;
       return utf8_bytes + end - start;
@@ -3857,7 +3981,7 @@ int String::WriteUtf8(char* buffer,
     FlattenString(str);  // Flatten the string for efficiency.
   }
   int string_length = str->length();
-  if (str->IsAsciiRepresentation()) {
+  if (str->IsOneByteRepresentation()) {
     int len;
     if (capacity == -1) {
       capacity = str->length() + 1;
@@ -3991,7 +4115,7 @@ int String::WriteAscii(char* buffer,
     FlattenString(str);  // Flatten the string for efficiency.
   }
 
-  if (str->IsAsciiRepresentation()) {
+  if (str->IsOneByteRepresentation()) {
     // WriteToFlat is faster than using the StringInputBuffer.
     if (length == -1) length = str->length() + 1;
     int len = i::Min(length, str->length() - start);
@@ -4089,6 +4213,29 @@ void v8::String::VerifyExternalStringResource(
   CHECK_EQ(expected, value);
 }
 
+void v8::String::VerifyExternalStringResourceBase(
+    v8::String::ExternalStringResourceBase* value, Encoding encoding) const {
+  i::Handle<i::String> str = Utils::OpenHandle(this);
+  const v8::String::ExternalStringResourceBase* expected;
+  Encoding expectedEncoding;
+  if (i::StringShape(*str).IsExternalAscii()) {
+    const void* resource =
+        i::Handle<i::ExternalAsciiString>::cast(str)->resource();
+    expected = reinterpret_cast<const ExternalStringResourceBase*>(resource);
+    expectedEncoding = ASCII_ENCODING;
+  } else if (i::StringShape(*str).IsExternalTwoByte()) {
+    const void* resource =
+        i::Handle<i::ExternalTwoByteString>::cast(str)->resource();
+    expected = reinterpret_cast<const ExternalStringResourceBase*>(resource);
+    expectedEncoding = TWO_BYTE_ENCODING;
+  } else {
+    expected = NULL;
+    expectedEncoding = str->IsOneByteRepresentation() ? ASCII_ENCODING
+                                                    : TWO_BYTE_ENCODING;
+  }
+  CHECK_EQ(expected, value);
+  CHECK_EQ(expectedEncoding, encoding);
+}
 
 const v8::String::ExternalAsciiStringResource*
       v8::String::GetExternalAsciiStringResource() const {
@@ -4163,75 +4310,65 @@ int v8::Object::InternalFieldCount() {
 }
 
 
-Local<Value> v8::Object::CheckedGetInternalField(int index) {
+static bool InternalFieldOK(i::Handle<i::JSObject> obj,
+                            int index,
+                            const char* location) {
+  return !IsDeadCheck(obj->GetIsolate(), location) &&
+      ApiCheck(index < obj->GetInternalFieldCount(),
+               location,
+               "Internal field out of bounds");
+}
+
+
+Local<Value> v8::Object::SlowGetInternalField(int index) {
   i::Handle<i::JSObject> obj = Utils::OpenHandle(this);
-  if (IsDeadCheck(obj->GetIsolate(), "v8::Object::GetInternalField()")) {
-    return Local<Value>();
-  }
-  if (!ApiCheck(index < obj->GetInternalFieldCount(),
-                "v8::Object::GetInternalField()",
-                "Reading internal field out of bounds")) {
-    return Local<Value>();
-  }
-  i::Handle<i::Object> value(obj->GetInternalField(index));
-  Local<Value> result = Utils::ToLocal(value);
-#ifdef DEBUG
-  Local<Value> unchecked = UncheckedGetInternalField(index);
-  ASSERT(unchecked.IsEmpty() || (unchecked == result));
-#endif
-  return result;
+  const char* location = "v8::Object::GetInternalField()";
+  if (!InternalFieldOK(obj, index, location)) return Local<Value>();
+  i::Handle<i::Object> value(obj->GetInternalField(index), obj->GetIsolate());
+  return Utils::ToLocal(value);
 }
 
 
 void v8::Object::SetInternalField(int index, v8::Handle<Value> value) {
   i::Handle<i::JSObject> obj = Utils::OpenHandle(this);
-  i::Isolate* isolate = obj->GetIsolate();
-  if (IsDeadCheck(isolate, "v8::Object::SetInternalField()")) {
-    return;
-  }
-  if (!ApiCheck(index < obj->GetInternalFieldCount(),
-                "v8::Object::SetInternalField()",
-                "Writing internal field out of bounds")) {
-    return;
-  }
-  ENTER_V8(isolate);
+  const char* location = "v8::Object::SetInternalField()";
+  if (!InternalFieldOK(obj, index, location)) return;
   i::Handle<i::Object> val = Utils::OpenHandle(*value);
   obj->SetInternalField(index, *val);
+  ASSERT_EQ(value, GetInternalField(index));
 }
 
 
-static bool CanBeEncodedAsSmi(void* ptr) {
-  const uintptr_t address = reinterpret_cast<uintptr_t>(ptr);
-  return ((address & i::kEncodablePointerMask) == 0);
+void* v8::Object::SlowGetAlignedPointerFromInternalField(int index) {
+  i::Handle<i::JSObject> obj = Utils::OpenHandle(this);
+  const char* location = "v8::Object::GetAlignedPointerFromInternalField()";
+  if (!InternalFieldOK(obj, index, location)) return NULL;
+  return DecodeSmiToAligned(obj->GetInternalField(index), location);
 }
 
 
-static i::Smi* EncodeAsSmi(void* ptr) {
-  ASSERT(CanBeEncodedAsSmi(ptr));
-  const uintptr_t address = reinterpret_cast<uintptr_t>(ptr);
-  i::Smi* result = reinterpret_cast<i::Smi*>(address << i::kPointerToSmiShift);
-  ASSERT(i::Internals::HasSmiTag(result));
-  ASSERT_EQ(result, i::Smi::FromInt(result->value()));
-  ASSERT_EQ(ptr, i::Internals::GetExternalPointerFromSmi(result));
-  return result;
+void v8::Object::SetAlignedPointerInInternalField(int index, void* value) {
+  i::Handle<i::JSObject> obj = Utils::OpenHandle(this);
+  const char* location = "v8::Object::SetAlignedPointerInInternalField()";
+  if (!InternalFieldOK(obj, index, location)) return;
+  obj->SetInternalField(index, EncodeAlignedAsSmi(value, location));
+  ASSERT_EQ(value, GetAlignedPointerFromInternalField(index));
 }
 
 
-void v8::Object::SetPointerInInternalField(int index, void* value) {
-  i::Isolate* isolate = Utils::OpenHandle(this)->GetIsolate();
-  ENTER_V8(isolate);
-  if (CanBeEncodedAsSmi(value)) {
-    Utils::OpenHandle(this)->SetInternalField(index, EncodeAsSmi(value));
-  } else {
-    HandleScope scope;
-    i::Handle<i::Foreign> foreign =
-        isolate->factory()->NewForeign(
-            reinterpret_cast<i::Address>(value), i::TENURED);
-    if (!foreign.is_null()) {
-      Utils::OpenHandle(this)->SetInternalField(index, *foreign);
-    }
-  }
-  ASSERT_EQ(value, GetPointerFromInternalField(index));
+static void* ExternalValue(i::Object* obj) {
+  // Obscure semantics for undefined, but somehow checked in our unit tests...
+  if (obj->IsUndefined()) return NULL;
+  i::Object* foreign = i::JSObject::cast(obj)->GetInternalField(0);
+  return i::Foreign::cast(foreign)->foreign_address();
+}
+
+
+void* Object::GetPointerFromInternalField(int index) {
+  i::Handle<i::JSObject> obj = Utils::OpenHandle(this);
+  const char* location = "v8::Object::GetPointerFromInternalField()";
+  if (!InternalFieldOK(obj, index, location)) return NULL;
+  return ExternalValue(obj->GetInternalField(index));
 }
 
 
@@ -4286,6 +4423,7 @@ bool v8::V8::Dispose() {
 
 HeapStatistics::HeapStatistics(): total_heap_size_(0),
                                   total_heap_size_executable_(0),
+                                  total_physical_size_(0),
                                   used_heap_size_(0),
                                   heap_size_limit_(0) { }
 
@@ -4295,6 +4433,7 @@ void v8::V8::GetHeapStatistics(HeapStatistics* heap_statistics) {
     // Isolate is unitialized thus heap is not configured yet.
     heap_statistics->set_total_heap_size(0);
     heap_statistics->set_total_heap_size_executable(0);
+    heap_statistics->set_total_physical_size(0);
     heap_statistics->set_used_heap_size(0);
     heap_statistics->set_heap_size_limit(0);
     return;
@@ -4304,6 +4443,7 @@ void v8::V8::GetHeapStatistics(HeapStatistics* heap_statistics) {
   heap_statistics->set_total_heap_size(heap->CommittedMemory());
   heap_statistics->set_total_heap_size_executable(
       heap->CommittedMemoryExecutable());
+  heap_statistics->set_total_physical_size(heap->CommittedPhysicalMemory());
   heap_statistics->set_used_heap_size(heap->SizeOfObjects());
   heap_statistics->set_heap_size_limit(heap->MaxReserved());
 }
@@ -4316,6 +4456,30 @@ void v8::V8::VisitExternalResources(ExternalResourceVisitor* visitor) {
 }
 
 
+void v8::V8::VisitHandlesWithClassIds(PersistentHandleVisitor* visitor) {
+  i::Isolate* isolate = i::Isolate::Current();
+  IsDeadCheck(isolate, "v8::V8::VisitHandlesWithClassId");
+
+  i::AssertNoAllocation no_allocation;
+
+  class VisitorAdapter : public i::ObjectVisitor {
+   public:
+    explicit VisitorAdapter(PersistentHandleVisitor* visitor)
+        : visitor_(visitor) {}
+    virtual void VisitPointers(i::Object** start, i::Object** end) {
+      UNREACHABLE();
+    }
+    virtual void VisitEmbedderReference(i::Object** p, uint16_t class_id) {
+      visitor_->VisitPersistentHandle(ToApi<Value>(i::Handle<i::Object>(p)),
+                                      class_id);
+    }
+   private:
+    PersistentHandleVisitor* visitor_;
+  } visitor_adapter(visitor);
+  isolate->global_handles()->IterateAllRootsWithClassIds(&visitor_adapter);
+}
+
+
 bool v8::V8::IdleNotification(int hint) {
   // Returning true tells the caller that it need not
   // continue to call IdleNotification.
@@ -4516,13 +4680,14 @@ v8::Local<v8::Context> Context::GetCalling() {
 
 
 v8::Local<v8::Object> Context::Global() {
-  if (IsDeadCheck(i::Isolate::Current(), "v8::Context::Global()")) {
+  i::Isolate* isolate = i::Isolate::Current();
+  if (IsDeadCheck(isolate, "v8::Context::Global()")) {
     return Local<v8::Object>();
   }
   i::Object** ctx = reinterpret_cast<i::Object**>(this);
   i::Handle<i::Context> context =
       i::Handle<i::Context>::cast(i::Handle<i::Object>(ctx));
-  i::Handle<i::Object> global(context->global_proxy());
+  i::Handle<i::Object> global(context->global_proxy(), isolate);
   return Utils::ToLocal(i::Handle<i::JSObject>::cast(global));
 }
 
@@ -4579,11 +4744,32 @@ bool Context::IsCodeGenerationFromStringsAllowed() {
 }
 
 
+void Context::SetErrorMessageForCodeGenerationFromStrings(
+    Handle<String> error) {
+  i::Isolate* isolate = i::Isolate::Current();
+  if (IsDeadCheck(isolate,
+      "v8::Context::SetErrorMessageForCodeGenerationFromStrings()")) {
+    return;
+  }
+  ENTER_V8(isolate);
+  i::Object** ctx = reinterpret_cast<i::Object**>(this);
+  i::Handle<i::Context> context =
+      i::Handle<i::Context>::cast(i::Handle<i::Object>(ctx));
+  i::Handle<i::Object> error_handle = Utils::OpenHandle(*error);
+  context->set_error_message_for_code_gen_from_strings(*error_handle);
+}
+
+
 void V8::SetWrapperClassId(i::Object** global_handle, uint16_t class_id) {
   i::GlobalHandles::SetWrapperClassId(global_handle, class_id);
 }
 
 
+uint16_t V8::GetWrapperClassId(internal::Object** global_handle) {
+  return i::GlobalHandles::GetWrapperClassId(global_handle);
+}
+
+
 Local<v8::Object> ObjectTemplate::NewInstance() {
   i::Isolate* isolate = i::Isolate::Current();
   ON_BAILOUT(isolate, "v8::ObjectTemplate::NewInstance()",
@@ -4622,74 +4808,20 @@ bool FunctionTemplate::HasInstance(v8::Handle<v8::Value> value) {
 }
 
 
-static Local<External> ExternalNewImpl(void* data) {
-  return Utils::ToLocal(FACTORY->NewForeign(static_cast<i::Address>(data)));
-}
-
-static void* ExternalValueImpl(i::Handle<i::Object> obj) {
-  return reinterpret_cast<void*>(i::Foreign::cast(*obj)->foreign_address());
-}
-
-
-Local<Value> v8::External::Wrap(void* data) {
-  i::Isolate* isolate = i::Isolate::Current();
-  STATIC_ASSERT(sizeof(data) == sizeof(i::Address));
-  EnsureInitializedForIsolate(isolate, "v8::External::Wrap()");
-  LOG_API(isolate, "External::Wrap");
-  ENTER_V8(isolate);
-
-  v8::Local<v8::Value> result = CanBeEncodedAsSmi(data)
-      ? Utils::ToLocal(i::Handle<i::Object>(EncodeAsSmi(data)))
-      : v8::Local<v8::Value>(ExternalNewImpl(data));
-
-  ASSERT_EQ(data, Unwrap(result));
-  return result;
-}
-
-
-void* v8::Object::SlowGetPointerFromInternalField(int index) {
-  i::Handle<i::JSObject> obj = Utils::OpenHandle(this);
-  i::Object* value = obj->GetInternalField(index);
-  if (value->IsSmi()) {
-    return i::Internals::GetExternalPointerFromSmi(value);
-  } else if (value->IsForeign()) {
-    return reinterpret_cast<void*>(i::Foreign::cast(value)->foreign_address());
-  } else {
-    return NULL;
-  }
-}
-
-
-void* v8::External::FullUnwrap(v8::Handle<v8::Value> wrapper) {
-  if (IsDeadCheck(i::Isolate::Current(), "v8::External::Unwrap()")) return 0;
-  i::Handle<i::Object> obj = Utils::OpenHandle(*wrapper);
-  void* result;
-  if (obj->IsSmi()) {
-    result = i::Internals::GetExternalPointerFromSmi(*obj);
-  } else if (obj->IsForeign()) {
-    result = ExternalValueImpl(obj);
-  } else {
-    result = NULL;
-  }
-  ASSERT_EQ(result, QuickUnwrap(wrapper));
-  return result;
-}
-
-
-Local<External> v8::External::New(void* data) {
-  STATIC_ASSERT(sizeof(data) == sizeof(i::Address));
+Local<External> v8::External::New(void* value) {
+  STATIC_ASSERT(sizeof(value) == sizeof(i::Address));
   i::Isolate* isolate = i::Isolate::Current();
   EnsureInitializedForIsolate(isolate, "v8::External::New()");
   LOG_API(isolate, "External::New");
   ENTER_V8(isolate);
-  return ExternalNewImpl(data);
+  i::Handle<i::JSObject> external = isolate->factory()->NewExternal(value);
+  return Utils::ExternalToLocal(external);
 }
 
 
 void* External::Value() const {
-  if (IsDeadCheck(i::Isolate::Current(), "v8::External::Value()")) return 0;
-  i::Handle<i::Object> obj = Utils::OpenHandle(this);
-  return ExternalValueImpl(obj);
+  if (IsDeadCheck(i::Isolate::Current(), "v8::External::Value()")) return NULL;
+  return ExternalValue(*Utils::OpenHandle(this));
 }
 
 
@@ -5155,24 +5287,39 @@ Local<Number> v8::Number::New(double value) {
 Local<Integer> v8::Integer::New(int32_t value) {
   i::Isolate* isolate = i::Isolate::UncheckedCurrent();
   EnsureInitializedForIsolate(isolate, "v8::Integer::New()");
+  return v8::Integer::New(value, reinterpret_cast<Isolate*>(isolate));
+}
+
+
+Local<Integer> Integer::NewFromUnsigned(uint32_t value) {
+  i::Isolate* isolate = i::Isolate::Current();
+  EnsureInitializedForIsolate(isolate, "v8::Integer::NewFromUnsigned()");
+  return Integer::NewFromUnsigned(value, reinterpret_cast<Isolate*>(isolate));
+}
+
+
+Local<Integer> v8::Integer::New(int32_t value, Isolate* isolate) {
+  i::Isolate* internal_isolate = reinterpret_cast<i::Isolate*>(isolate);
+  ASSERT(internal_isolate->IsInitialized());
   if (i::Smi::IsValid(value)) {
     return Utils::IntegerToLocal(i::Handle<i::Object>(i::Smi::FromInt(value),
-                                                      isolate));
+                                                      internal_isolate));
   }
-  ENTER_V8(isolate);
-  i::Handle<i::Object> result = isolate->factory()->NewNumber(value);
+  ENTER_V8(internal_isolate);
+  i::Handle<i::Object> result = internal_isolate->factory()->NewNumber(value);
   return Utils::IntegerToLocal(result);
 }
 
 
-Local<Integer> Integer::NewFromUnsigned(uint32_t value) {
+Local<Integer> v8::Integer::NewFromUnsigned(uint32_t value, Isolate* isolate) {
+  i::Isolate* internal_isolate = reinterpret_cast<i::Isolate*>(isolate);
+  ASSERT(internal_isolate->IsInitialized());
   bool fits_into_int32_t = (value & (1 << 31)) == 0;
   if (fits_into_int32_t) {
-    return Integer::New(static_cast<int32_t>(value));
+    return Integer::New(static_cast<int32_t>(value), isolate);
   }
-  i::Isolate* isolate = i::Isolate::Current();
-  ENTER_V8(isolate);
-  i::Handle<i::Object> result = isolate->factory()->NewNumber(value);
+  ENTER_V8(internal_isolate);
+  i::Handle<i::Object> result = internal_isolate->factory()->NewNumber(value);
   return Utils::IntegerToLocal(result);
 }
 
@@ -5182,19 +5329,14 @@ void V8::IgnoreOutOfMemoryException() {
 }
 
 
-bool V8::AddMessageListener(MessageCallback that, Handle<Value> data) {
+bool V8::AddMessageListener(MessageCallback that) {
   i::Isolate* isolate = i::Isolate::Current();
   EnsureInitializedForIsolate(isolate, "v8::V8::AddMessageListener()");
   ON_BAILOUT(isolate, "v8::V8::AddMessageListener()", return false);
   ENTER_V8(isolate);
   i::HandleScope scope(isolate);
   NeanderArray listeners(isolate->factory()->message_listeners());
-  NeanderObject obj(2);
-  obj.set(0, *isolate->factory()->NewForeign(FUNCTION_ADDR(that)));
-  obj.set(1, data.IsEmpty() ?
-             isolate->heap()->undefined_value() :
-             *Utils::OpenHandle(*data));
-  listeners.add(obj.value());
+  listeners.add(isolate->factory()->NewForeign(FUNCTION_ADDR(that)));
   return true;
 }
 
@@ -5209,8 +5351,7 @@ void V8::RemoveMessageListeners(MessageCallback that) {
   for (int i = 0; i < listeners.length(); i++) {
     if (listeners.get(i)->IsUndefined()) continue;  // skip deleted ones
 
-    NeanderObject listener(i::JSObject::cast(listeners.get(i)));
-    i::Handle<i::Foreign> callback_obj(i::Foreign::cast(listener.get(0)));
+    i::Handle<i::Foreign> callback_obj(i::Foreign::cast(listeners.get(i)));
     if (callback_obj->foreign_address() == FUNCTION_ADDR(that)) {
       listeners.set(i, isolate->heap()->undefined_value());
     }
@@ -5250,13 +5391,6 @@ void V8::SetAddHistogramSampleFunction(AddHistogramSampleCallback callback) {
       SetAddHistogramSampleFunction(callback);
 }
 
-void V8::EnableSlidingStateWindow() {
-  i::Isolate* isolate = i::Isolate::Current();
-  if (IsDeadCheck(isolate, "v8::V8::EnableSlidingStateWindow()")) return;
-  isolate->logger()->EnableSlidingStateWindow();
-}
-
-
 void V8::SetFailedAccessCheckCallbackFunction(
       FailedAccessCheckCallback callback) {
   i::Isolate* isolate = i::Isolate::Current();
@@ -5266,6 +5400,7 @@ void V8::SetFailedAccessCheckCallbackFunction(
   isolate->SetFailedAccessCheckCallback(callback);
 }
 
+
 void V8::AddObjectGroup(Persistent<Value>* objects,
                         size_t length,
                         RetainedObjectInfo* info) {
@@ -5277,6 +5412,19 @@ void V8::AddObjectGroup(Persistent<Value>* objects,
 }
 
 
+void V8::AddObjectGroup(Isolate* exportedIsolate,
+                        Persistent<Value>* objects,
+                        size_t length,
+                        RetainedObjectInfo* info) {
+  i::Isolate* isolate = reinterpret_cast<i::Isolate*>(exportedIsolate);
+  ASSERT(isolate == i::Isolate::Current());
+  if (IsDeadCheck(isolate, "v8::V8::AddObjectGroup()")) return;
+  STATIC_ASSERT(sizeof(Persistent<Value>) == sizeof(i::Object**));
+  isolate->global_handles()->AddObjectGroup(
+      reinterpret_cast<i::Object***>(objects), length, info);
+}
+
+
 void V8::AddImplicitReferences(Persistent<Object> parent,
                                Persistent<Value>* children,
                                size_t length) {
@@ -6287,7 +6435,8 @@ SnapshotObjectId HeapProfiler::GetSnapshotObjectId(Handle<Value> value) {
 
 const HeapSnapshot* HeapProfiler::TakeSnapshot(Handle<String> title,
                                                HeapSnapshot::Type type,
-                                               ActivityControl* control) {
+                                               ActivityControl* control,
+                                               ObjectNameResolver* resolver) {
   i::Isolate* isolate = i::Isolate::Current();
   IsDeadCheck(isolate, "v8::HeapProfiler::TakeSnapshot");
   i::HeapSnapshot::Type internal_type = i::HeapSnapshot::kFull;
@@ -6300,7 +6449,7 @@ const HeapSnapshot* HeapProfiler::TakeSnapshot(Handle<String> title,
   }
   return reinterpret_cast<const HeapSnapshot*>(
       i::HeapProfiler::TakeSnapshot(
-          *Utils::OpenHandle(*title), internal_type, control));
+          *Utils::OpenHandle(*title), internal_type, control, resolver));
 }
 
 
@@ -6411,6 +6560,7 @@ void Testing::PrepareStressRun(int run) {
 
 
 void Testing::DeoptimizeAll() {
+  i::HandleScope scope;
   internal::Deoptimizer::DeoptimizeAll();
 }
 
diff --git a/deps/v8/src/api.h b/deps/v8/src/api.h
index 7197b6cb54..ca2240b640 100644
--- a/deps/v8/src/api.h
+++ b/deps/v8/src/api.h
@@ -201,8 +201,6 @@ class Utils {
       v8::internal::Handle<v8::internal::JSObject> obj);
   static inline Local<Array> ToLocal(
       v8::internal::Handle<v8::internal::JSArray> obj);
-  static inline Local<External> ToLocal(
-      v8::internal::Handle<v8::internal::Foreign> obj);
   static inline Local<Message> MessageToLocal(
       v8::internal::Handle<v8::internal::Object> obj);
   static inline Local<StackTrace> StackTraceToLocal(
@@ -225,6 +223,8 @@ class Utils {
       v8::internal::Handle<v8::internal::FunctionTemplateInfo> obj);
   static inline Local<TypeSwitch> ToLocal(
       v8::internal::Handle<v8::internal::TypeSwitchInfo> obj);
+  static inline Local<External> ExternalToLocal(
+      v8::internal::Handle<v8::internal::JSObject> obj);
 
 #define DECLARE_OPEN_HANDLE(From, To) \
   static inline v8::internal::Handle<v8::internal::To> \
@@ -268,7 +268,6 @@ MAKE_TO_LOCAL(ToLocal, String, String)
 MAKE_TO_LOCAL(ToLocal, JSRegExp, RegExp)
 MAKE_TO_LOCAL(ToLocal, JSObject, Object)
 MAKE_TO_LOCAL(ToLocal, JSArray, Array)
-MAKE_TO_LOCAL(ToLocal, Foreign, External)
 MAKE_TO_LOCAL(ToLocal, FunctionTemplateInfo, FunctionTemplate)
 MAKE_TO_LOCAL(ToLocal, ObjectTemplateInfo, ObjectTemplate)
 MAKE_TO_LOCAL(ToLocal, SignatureInfo, Signature)
@@ -280,6 +279,7 @@ MAKE_TO_LOCAL(StackFrameToLocal, JSObject, StackFrame)
 MAKE_TO_LOCAL(NumberToLocal, Object, Number)
 MAKE_TO_LOCAL(IntegerToLocal, Object, Integer)
 MAKE_TO_LOCAL(Uint32ToLocal, Object, Uint32)
+MAKE_TO_LOCAL(ExternalToLocal, JSObject, External)
 
 #undef MAKE_TO_LOCAL
 
diff --git a/deps/v8/src/arm/assembler-arm-inl.h b/deps/v8/src/arm/assembler-arm-inl.h
index c47c094756..acd61feff8 100644
--- a/deps/v8/src/arm/assembler-arm-inl.h
+++ b/deps/v8/src/arm/assembler-arm-inl.h
@@ -75,7 +75,7 @@ Address RelocInfo::target_address_address() {
   ASSERT(IsCodeTarget(rmode_) || rmode_ == RUNTIME_ENTRY
                               || rmode_ == EMBEDDED_OBJECT
                               || rmode_ == EXTERNAL_REFERENCE);
-  return reinterpret_cast<Address>(Assembler::target_address_address_at(pc_));
+  return reinterpret_cast<Address>(Assembler::target_pointer_address_at(pc_));
 }
 
 
@@ -97,25 +97,30 @@ void RelocInfo::set_target_address(Address target, WriteBarrierMode mode) {
 
 Object* RelocInfo::target_object() {
   ASSERT(IsCodeTarget(rmode_) || rmode_ == EMBEDDED_OBJECT);
-  return Memory::Object_at(Assembler::target_address_address_at(pc_));
+  return reinterpret_cast<Object*>(Assembler::target_pointer_at(pc_));
 }
 
 
 Handle<Object> RelocInfo::target_object_handle(Assembler* origin) {
   ASSERT(IsCodeTarget(rmode_) || rmode_ == EMBEDDED_OBJECT);
-  return Memory::Object_Handle_at(Assembler::target_address_address_at(pc_));
+  return Handle<Object>(reinterpret_cast<Object**>(
+      Assembler::target_pointer_at(pc_)));
 }
 
 
 Object** RelocInfo::target_object_address() {
+  // Provide a "natural pointer" to the embedded object,
+  // which can be de-referenced during heap iteration.
   ASSERT(IsCodeTarget(rmode_) || rmode_ == EMBEDDED_OBJECT);
-  return reinterpret_cast<Object**>(Assembler::target_address_address_at(pc_));
+  reconstructed_obj_ptr_ =
+      reinterpret_cast<Object*>(Assembler::target_pointer_at(pc_));
+  return &reconstructed_obj_ptr_;
 }
 
 
 void RelocInfo::set_target_object(Object* target, WriteBarrierMode mode) {
   ASSERT(IsCodeTarget(rmode_) || rmode_ == EMBEDDED_OBJECT);
-  Assembler::set_target_address_at(pc_, reinterpret_cast<Address>(target));
+  Assembler::set_target_pointer_at(pc_, reinterpret_cast<Address>(target));
   if (mode == UPDATE_WRITE_BARRIER &&
       host() != NULL &&
       target->IsHeapObject()) {
@@ -127,7 +132,8 @@ void RelocInfo::set_target_object(Object* target, WriteBarrierMode mode) {
 
 Address* RelocInfo::target_reference_address() {
   ASSERT(rmode_ == EXTERNAL_REFERENCE);
-  return reinterpret_cast<Address*>(Assembler::target_address_address_at(pc_));
+  reconstructed_adr_ptr_ = Assembler::target_address_at(pc_);
+  return &reconstructed_adr_ptr_;
 }
 
 
@@ -159,6 +165,24 @@ void RelocInfo::set_target_cell(JSGlobalPropertyCell* cell,
 }
 
 
+static const int kNoCodeAgeSequenceLength = 3;
+
+Code* RelocInfo::code_age_stub() {
+  ASSERT(rmode_ == RelocInfo::CODE_AGE_SEQUENCE);
+  return Code::GetCodeFromTargetAddress(
+      Memory::Address_at(pc_ + Assembler::kInstrSize *
+                         (kNoCodeAgeSequenceLength - 1)));
+}
+
+
+void RelocInfo::set_code_age_stub(Code* stub) {
+  ASSERT(rmode_ == RelocInfo::CODE_AGE_SEQUENCE);
+  Memory::Address_at(pc_ + Assembler::kInstrSize *
+                     (kNoCodeAgeSequenceLength - 1)) =
+      stub->instruction_start();
+}
+
+
 Address RelocInfo::call_address() {
   // The 2 instructions offset assumes patched debug break slot or return
   // sequence.
@@ -232,6 +256,8 @@ void RelocInfo::Visit(ObjectVisitor* visitor) {
     visitor->VisitGlobalPropertyCell(this);
   } else if (mode == RelocInfo::EXTERNAL_REFERENCE) {
     visitor->VisitExternalReference(this);
+  } else if (RelocInfo::IsCodeAgeSequence(mode)) {
+    visitor->VisitCodeAgeSequence(this);
 #ifdef ENABLE_DEBUGGER_SUPPORT
   // TODO(isolates): Get a cached isolate below.
   } else if (((RelocInfo::IsJSReturn(mode) &&
@@ -258,6 +284,8 @@ void RelocInfo::Visit(Heap* heap) {
     StaticVisitor::VisitGlobalPropertyCell(heap, this);
   } else if (mode == RelocInfo::EXTERNAL_REFERENCE) {
     StaticVisitor::VisitExternalReference(this);
+  } else if (RelocInfo::IsCodeAgeSequence(mode)) {
+    StaticVisitor::VisitCodeAgeSequence(heap, this);
 #ifdef ENABLE_DEBUGGER_SUPPORT
   } else if (heap->isolate()->debug()->has_break_points() &&
              ((RelocInfo::IsJSReturn(mode) &&
@@ -326,7 +354,7 @@ void Assembler::emit(Instr x) {
 }
 
 
-Address Assembler::target_address_address_at(Address pc) {
+Address Assembler::target_pointer_address_at(Address pc) {
   Address target_pc = pc;
   Instr instr = Memory::int32_at(target_pc);
   // If we have a bx instruction, the instruction before the bx is
@@ -356,8 +384,63 @@ Address Assembler::target_address_address_at(Address pc) {
 }
 
 
-Address Assembler::target_address_at(Address pc) {
-  return Memory::Address_at(target_address_address_at(pc));
+Address Assembler::target_pointer_at(Address pc) {
+  if (IsMovW(Memory::int32_at(pc))) {
+    ASSERT(IsMovT(Memory::int32_at(pc + kInstrSize)));
+    Instruction* instr = Instruction::At(pc);
+    Instruction* next_instr = Instruction::At(pc + kInstrSize);
+    return reinterpret_cast<Address>(
+        (next_instr->ImmedMovwMovtValue() << 16) |
+        instr->ImmedMovwMovtValue());
+  }
+  return Memory::Address_at(target_pointer_address_at(pc));
+}
+
+
+Address Assembler::target_address_from_return_address(Address pc) {
+  // Returns the address of the call target from the return address that will
+  // be returned to after a call.
+#ifdef USE_BLX
+  // Call sequence on V7 or later is :
+  //  movw  ip, #... @ call address low 16
+  //  movt  ip, #... @ call address high 16
+  //  blx   ip
+  //                      @ return address
+  // Or pre-V7 or cases that need frequent patching:
+  //  ldr   ip, [pc, #...] @ call address
+  //  blx   ip
+  //                      @ return address
+  Address candidate = pc - 2 * Assembler::kInstrSize;
+  Instr candidate_instr(Memory::int32_at(candidate));
+  if (IsLdrPcImmediateOffset(candidate_instr)) {
+    return candidate;
+  }
+  candidate = pc - 3 * Assembler::kInstrSize;
+  ASSERT(IsMovW(Memory::int32_at(candidate)) &&
+         IsMovT(Memory::int32_at(candidate + kInstrSize)));
+  return candidate;
+#else
+  // Call sequence is:
+  //  mov  lr, pc
+  //  ldr  pc, [pc, #...] @ call address
+  //                      @ return address
+  return pc - kInstrSize;
+#endif
+}
+
+
+Address Assembler::return_address_from_call_start(Address pc) {
+#ifdef USE_BLX
+  if (IsLdrPcImmediateOffset(Memory::int32_at(pc))) {
+    return pc + kInstrSize * 2;
+  } else {
+    ASSERT(IsMovW(Memory::int32_at(pc)));
+    ASSERT(IsMovT(Memory::int32_at(pc + kInstrSize)));
+    return pc + kInstrSize * 3;
+  }
+#else
+  return pc + kInstrSize;
+#endif
 }
 
 
@@ -373,17 +456,53 @@ void Assembler::set_external_target_at(Address constant_pool_entry,
 }
 
 
+static Instr EncodeMovwImmediate(uint32_t immediate) {
+  ASSERT(immediate < 0x10000);
+  return ((immediate & 0xf000) << 4) | (immediate & 0xfff);
+}
+
+
+void Assembler::set_target_pointer_at(Address pc, Address target) {
+  if (IsMovW(Memory::int32_at(pc))) {
+    ASSERT(IsMovT(Memory::int32_at(pc + kInstrSize)));
+    uint32_t* instr_ptr = reinterpret_cast<uint32_t*>(pc);
+    uint32_t immediate = reinterpret_cast<uint32_t>(target);
+    uint32_t intermediate = instr_ptr[0];
+    intermediate &= ~EncodeMovwImmediate(0xFFFF);
+    intermediate |= EncodeMovwImmediate(immediate & 0xFFFF);
+    instr_ptr[0] = intermediate;
+    intermediate = instr_ptr[1];
+    intermediate &= ~EncodeMovwImmediate(0xFFFF);
+    intermediate |= EncodeMovwImmediate(immediate >> 16);
+    instr_ptr[1] = intermediate;
+    ASSERT(IsMovW(Memory::int32_at(pc)));
+    ASSERT(IsMovT(Memory::int32_at(pc + kInstrSize)));
+    CPU::FlushICache(pc, 2 * kInstrSize);
+  } else {
+    ASSERT(IsLdrPcImmediateOffset(Memory::int32_at(pc)));
+    Memory::Address_at(target_pointer_address_at(pc)) = target;
+    // Intuitively, we would think it is necessary to always flush the
+    // instruction cache after patching a target address in the code as follows:
+    //   CPU::FlushICache(pc, sizeof(target));
+    // However, on ARM, no instruction is actually patched in the case
+    // of embedded constants of the form:
+    // ldr   ip, [pc, #...]
+    // since the instruction accessing this address in the constant pool remains
+    // unchanged.
+  }
+}
+
+
+Address Assembler::target_address_at(Address pc) {
+  return target_pointer_at(pc);
+}
+
+
 void Assembler::set_target_address_at(Address pc, Address target) {
-  Memory::Address_at(target_address_address_at(pc)) = target;
-  // Intuitively, we would think it is necessary to flush the instruction cache
-  // after patching a target address in the code as follows:
-  //   CPU::FlushICache(pc, sizeof(target));
-  // However, on ARM, no instruction was actually patched by the assignment
-  // above; the target address is not part of an instruction, it is patched in
-  // the constant pool and is read via a data access; the instruction accessing
-  // this address in the constant pool remains unchanged.
+  set_target_pointer_at(pc, target);
 }
 
+
 } }  // namespace v8::internal
 
 #endif  // V8_ARM_ASSEMBLER_ARM_INL_H_
diff --git a/deps/v8/src/arm/assembler-arm.cc b/deps/v8/src/arm/assembler-arm.cc
index 30a8830c9e..47ea0e2066 100644
--- a/deps/v8/src/arm/assembler-arm.cc
+++ b/deps/v8/src/arm/assembler-arm.cc
@@ -77,6 +77,9 @@ static unsigned CpuFeaturesImpliedByCompiler() {
 #endif  // defined(CAN_USE_ARMV7_INSTRUCTIONS) && defined(__VFP_FP__)
         // && !defined(__SOFTFP__)
 #endif  // _arm__
+  if (answer & (1u << ARMv7)) {
+    answer |= 1u << UNALIGNED_ACCESSES;
+  }
 
   return answer;
 }
@@ -110,6 +113,14 @@ void CpuFeatures::Probe() {
   if (FLAG_enable_armv7) {
     supported_ |= 1u << ARMv7;
   }
+
+  if (FLAG_enable_sudiv) {
+    supported_ |= 1u << SUDIV;
+  }
+
+  if (FLAG_enable_movw_movt) {
+    supported_ |= 1u << MOVW_MOVT_IMMEDIATE_LOADS;
+  }
 #else  // __arm__
   // Probe for additional features not already known to be available.
   if (!IsSupported(VFP3) && OS::ArmCpuHasFeature(VFP3)) {
@@ -125,6 +136,19 @@ void CpuFeatures::Probe() {
     found_by_runtime_probing_ |= 1u << ARMv7;
   }
 
+  if (!IsSupported(SUDIV) && OS::ArmCpuHasFeature(SUDIV)) {
+    found_by_runtime_probing_ |= 1u << SUDIV;
+  }
+
+  if (!IsSupported(UNALIGNED_ACCESSES) && OS::ArmCpuHasFeature(ARMv7)) {
+    found_by_runtime_probing_ |= 1u << UNALIGNED_ACCESSES;
+  }
+
+  if (OS::GetCpuImplementer() == QUALCOMM_IMPLEMENTER &&
+      OS::ArmCpuHasFeature(ARMv7)) {
+    found_by_runtime_probing_ |= 1u << MOVW_MOVT_IMMEDIATE_LOADS;
+  }
+
   supported_ |= found_by_runtime_probing_;
 #endif
 
@@ -294,46 +318,11 @@ const Instr kLdrStrInstrArgumentMask = 0x0000ffff;
 const Instr kLdrStrOffsetMask = 0x00000fff;
 
 
-// Spare buffer.
-static const int kMinimalBufferSize = 4*KB;
-
-
-Assembler::Assembler(Isolate* arg_isolate, void* buffer, int buffer_size)
-    : AssemblerBase(arg_isolate),
+Assembler::Assembler(Isolate* isolate, void* buffer, int buffer_size)
+    : AssemblerBase(isolate, buffer, buffer_size),
       recorded_ast_id_(TypeFeedbackId::None()),
-      positions_recorder_(this),
-      emit_debug_code_(FLAG_debug_code),
-      predictable_code_size_(false) {
-  if (buffer == NULL) {
-    // Do our own buffer management.
-    if (buffer_size <= kMinimalBufferSize) {
-      buffer_size = kMinimalBufferSize;
-
-      if (isolate()->assembler_spare_buffer() != NULL) {
-        buffer = isolate()->assembler_spare_buffer();
-        isolate()->set_assembler_spare_buffer(NULL);
-      }
-    }
-    if (buffer == NULL) {
-      buffer_ = NewArray<byte>(buffer_size);
-    } else {
-      buffer_ = static_cast<byte*>(buffer);
-    }
-    buffer_size_ = buffer_size;
-    own_buffer_ = true;
-
-  } else {
-    // Use externally provided buffer instead.
-    ASSERT(buffer_size > 0);
-    buffer_ = static_cast<byte*>(buffer);
-    buffer_size_ = buffer_size;
-    own_buffer_ = false;
-  }
-
-  // Set up buffer pointers.
-  ASSERT(buffer_ != NULL);
-  pc_ = buffer_;
-  reloc_info_writer.Reposition(buffer_ + buffer_size, pc_);
+      positions_recorder_(this) {
+  reloc_info_writer.Reposition(buffer_ + buffer_size_, pc_);
   num_pending_reloc_info_ = 0;
   next_buffer_check_ = 0;
   const_pool_blocked_nesting_ = 0;
@@ -346,14 +335,6 @@ Assembler::Assembler(Isolate* arg_isolate, void* buffer, int buffer_size)
 
 Assembler::~Assembler() {
   ASSERT(const_pool_blocked_nesting_ == 0);
-  if (own_buffer_) {
-    if (isolate()->assembler_spare_buffer() == NULL &&
-        buffer_size_ == kMinimalBufferSize) {
-      isolate()->set_assembler_spare_buffer(buffer_);
-    } else {
-      DeleteArray(buffer_);
-    }
-  }
 }
 
 
@@ -715,12 +696,6 @@ void Assembler::next(Label* L) {
 }
 
 
-static Instr EncodeMovwImmediate(uint32_t immediate) {
-  ASSERT(immediate < 0x10000);
-  return ((immediate & 0xf000) << 4) | (immediate & 0xfff);
-}
-
-
 // Low-level code emission routines depending on the addressing mode.
 // If this returns true then you have to use the rotate_imm and immed_8
 // that it returns, because it may have already changed the instruction
@@ -785,7 +760,7 @@ static bool fits_shifter(uint32_t imm32,
 // if they can be encoded in the ARM's 12 bits of immediate-offset instruction
 // space.  There is no guarantee that the relocated location can be similarly
 // encoded.
-bool Operand::must_use_constant_pool(const Assembler* assembler) const {
+bool Operand::must_output_reloc_info(const Assembler* assembler) const {
   if (rmode_ == RelocInfo::EXTERNAL_REFERENCE) {
 #ifdef DEBUG
     if (!Serializer::enabled()) {
@@ -801,25 +776,28 @@ bool Operand::must_use_constant_pool(const Assembler* assembler) const {
 }
 
 
+static bool use_movw_movt(const Operand& x, const Assembler* assembler) {
+  if (Assembler::use_immediate_embedded_pointer_loads(assembler)) {
+    return true;
+  }
+  if (x.must_output_reloc_info(assembler)) {
+    return false;
+  }
+  return CpuFeatures::IsSupported(ARMv7);
+}
+
+
 bool Operand::is_single_instruction(const Assembler* assembler,
                                     Instr instr) const {
   if (rm_.is_valid()) return true;
   uint32_t dummy1, dummy2;
-  if (must_use_constant_pool(assembler) ||
+  if (must_output_reloc_info(assembler) ||
       !fits_shifter(imm32_, &dummy1, &dummy2, &instr)) {
     // The immediate operand cannot be encoded as a shifter operand, or use of
     // constant pool is required. For a mov instruction not setting the
     // condition code additional instruction conventions can be used.
     if ((instr & ~kCondMask) == 13*B21) {  // mov, S not set
-      if (must_use_constant_pool(assembler) ||
-          !CpuFeatures::IsSupported(ARMv7)) {
-        // mov instruction will be an ldr from constant pool (one instruction).
-        return true;
-      } else {
-        // mov instruction will be a mov or movw followed by movt (two
-        // instructions).
-        return false;
-      }
+      return !use_movw_movt(*this, assembler);
     } else {
       // If this is not a mov or mvn instruction there will always an additional
       // instructions - either mov or ldr. The mov might actually be two
@@ -835,6 +813,29 @@ bool Operand::is_single_instruction(const Assembler* assembler,
 }
 
 
+void Assembler::move_32_bit_immediate(Condition cond,
+                                      Register rd,
+                                      SBit s,
+                                      const Operand& x) {
+  if (rd.code() != pc.code() && s == LeaveCC) {
+    if (use_movw_movt(x, this)) {
+      if (x.must_output_reloc_info(this)) {
+        RecordRelocInfo(x.rmode_, x.imm32_, DONT_USE_CONSTANT_POOL);
+        // Make sure the movw/movt doesn't get separated.
+        BlockConstPoolFor(2);
+      }
+      emit(cond | 0x30*B20 | rd.code()*B12 |
+           EncodeMovwImmediate(x.imm32_ & 0xffff));
+      movt(rd, static_cast<uint32_t>(x.imm32_) >> 16, cond);
+      return;
+    }
+  }
+
+  RecordRelocInfo(x.rmode_, x.imm32_, USE_CONSTANT_POOL);
+  ldr(rd, MemOperand(pc, 0), cond);
+}
+
+
 void Assembler::addrmod1(Instr instr,
                          Register rn,
                          Register rd,
@@ -845,7 +846,7 @@ void Assembler::addrmod1(Instr instr,
     // Immediate.
     uint32_t rotate_imm;
     uint32_t immed_8;
-    if (x.must_use_constant_pool(this) ||
+    if (x.must_output_reloc_info(this) ||
         !fits_shifter(x.imm32_, &rotate_imm, &immed_8, &instr)) {
       // The immediate operand cannot be encoded as a shifter operand, so load
       // it first to register ip and change the original instruction to use ip.
@@ -854,24 +855,19 @@ void Assembler::addrmod1(Instr instr,
       CHECK(!rn.is(ip));  // rn should never be ip, or will be trashed
       Condition cond = Instruction::ConditionField(instr);
       if ((instr & ~kCondMask) == 13*B21) {  // mov, S not set
-        if (x.must_use_constant_pool(this) ||
-            !CpuFeatures::IsSupported(ARMv7)) {
-          RecordRelocInfo(x.rmode_, x.imm32_);
-          ldr(rd, MemOperand(pc, 0), cond);
-        } else {
-          // Will probably use movw, will certainly not use constant pool.
-          mov(rd, Operand(x.imm32_ & 0xffff), LeaveCC, cond);
-          movt(rd, static_cast<uint32_t>(x.imm32_) >> 16, cond);
-        }
+        move_32_bit_immediate(cond, rd, LeaveCC, x);
       } else {
-        // If this is not a mov or mvn instruction we may still be able to avoid
-        // a constant pool entry by using mvn or movw.
-        if (!x.must_use_constant_pool(this) &&
-            (instr & kMovMvnMask) != kMovMvnPattern) {
-          mov(ip, x, LeaveCC, cond);
-        } else {
-          RecordRelocInfo(x.rmode_, x.imm32_);
+        if ((instr & kMovMvnMask) == kMovMvnPattern) {
+          // Moves need to use a constant pool entry.
+          RecordRelocInfo(x.rmode_, x.imm32_, USE_CONSTANT_POOL);
           ldr(ip, MemOperand(pc, 0), cond);
+        } else if (x.must_output_reloc_info(this)) {
+          // Otherwise, use most efficient form of fetching from constant pool.
+          move_32_bit_immediate(cond, ip, LeaveCC, x);
+        } else {
+          // If this is not a mov or mvn instruction we may still be able to
+          // avoid a constant pool entry by using mvn or movw.
+          mov(ip, x, LeaveCC, cond);
         }
         addrmod1(instr, rn, rd, Operand(ip));
       }
@@ -1178,6 +1174,9 @@ void Assembler::mov(Register dst, const Operand& src, SBit s, Condition cond) {
 
 void Assembler::movw(Register reg, uint32_t immediate, Condition cond) {
   ASSERT(immediate < 0x10000);
+  // May use movw if supported, but on unsupported platforms will try to use
+  // equivalent rotated immed_8 value and other tricks before falling back to a
+  // constant pool load.
   mov(reg, Operand(immediate), LeaveCC, cond);
 }
 
@@ -1207,6 +1206,22 @@ void Assembler::mla(Register dst, Register src1, Register src2, Register srcA,
 }
 
 
+void Assembler::mls(Register dst, Register src1, Register src2, Register srcA,
+                    Condition cond) {
+  ASSERT(!dst.is(pc) && !src1.is(pc) && !src2.is(pc) && !srcA.is(pc));
+  emit(cond | B22 | B21 | dst.code()*B16 | srcA.code()*B12 |
+       src2.code()*B8 | B7 | B4 | src1.code());
+}
+
+
+void Assembler::sdiv(Register dst, Register src1, Register src2,
+                     Condition cond) {
+  ASSERT(!dst.is(pc) && !src1.is(pc) && !src2.is(pc));
+  emit(cond | B26 | B25| B24 | B20 | dst.code()*B16 | 0xf * B12 |
+       src2.code()*B8 | B4 | src1.code());
+}
+
+
 void Assembler::mul(Register dst, Register src1, Register src2,
                     SBit s, Condition cond) {
   ASSERT(!dst.is(pc) && !src1.is(pc) && !src2.is(pc));
@@ -1391,7 +1406,7 @@ void Assembler::msr(SRegisterFieldMask fields, const Operand& src,
     // Immediate.
     uint32_t rotate_imm;
     uint32_t immed_8;
-    if (src.must_use_constant_pool(this) ||
+    if (src.must_output_reloc_info(this) ||
         !fits_shifter(src.imm32_, &rotate_imm, &immed_8, NULL)) {
       // Immediate operand cannot be encoded, load it first to register ip.
       RecordRelocInfo(src.rmode_, src.imm32_);
@@ -1826,7 +1841,7 @@ void Assembler::vstr(const SwVfpRegister src,
                      const Condition cond) {
   ASSERT(!operand.rm().is_valid());
   ASSERT(operand.am_ == Offset);
-  vldr(src, operand.rn(), operand.offset(), cond);
+  vstr(src, operand.rn(), operand.offset(), cond);
 }
 
 
@@ -1975,6 +1990,7 @@ static bool FitsVMOVDoubleImmediate(double d, uint32_t *encoding) {
 
 void Assembler::vmov(const DwVfpRegister dst,
                      double imm,
+                     const Register scratch,
                      const Condition cond) {
   // Dd = immediate
   // Instruction details available in ARM DDI 0406B, A8-640.
@@ -1989,22 +2005,22 @@ void Assembler::vmov(const DwVfpRegister dst,
     // using vldr from a constant pool.
     uint32_t lo, hi;
     DoubleAsTwoUInt32(imm, &lo, &hi);
+    mov(ip, Operand(lo));
 
-    if (lo == hi) {
-      // If the lo and hi parts of the double are equal, the literal is easier
-      // to create. This is the case with 0.0.
-      mov(ip, Operand(lo));
-      vmov(dst, ip, ip);
-    } else {
+    if (scratch.is(no_reg)) {
       // Move the low part of the double into the lower of the corresponsing S
       // registers of D register dst.
-      mov(ip, Operand(lo));
       vmov(dst.low(), ip, cond);
 
       // Move the high part of the double into the higher of the corresponsing S
       // registers of D register dst.
       mov(ip, Operand(hi));
       vmov(dst.high(), ip, cond);
+    } else {
+      // Move the low and high parts of the double to a D register in one
+      // instruction.
+      mov(scratch, Operand(hi));
+      vmov(dst, ip, scratch, cond);
     }
   }
 }
@@ -2333,6 +2349,20 @@ void Assembler::vmul(const DwVfpRegister dst,
 }
 
 
+void Assembler::vmla(const DwVfpRegister dst,
+                     const DwVfpRegister src1,
+                     const DwVfpRegister src2,
+                     const Condition cond) {
+  // Instruction details available in ARM DDI 0406C.b, A8-892.
+  // cond(31-28) | 11100(27-23) | D=?(22) | 00(21-20) | Vn(19-16) |
+  // Vd(15-12) | 101(11-9) | sz(8)=1 | N=?(7) | op(6)=0 | M=?(5) | 0(4) |
+  // Vm(3-0)
+  unsigned x = (cond | 0x1C*B23 | src1.code()*B16 |
+      dst.code()*B12 | 0x5*B9 | B8 | src2.code());
+  emit(x);
+}
+
+
 void Assembler::vdiv(const DwVfpRegister dst,
                      const DwVfpRegister src1,
                      const DwVfpRegister src2,
@@ -2408,15 +2438,35 @@ void Assembler::vsqrt(const DwVfpRegister dst,
 
 // Pseudo instructions.
 void Assembler::nop(int type) {
-  // This is mov rx, rx.
-  ASSERT(0 <= type && type <= 14);  // mov pc, pc is not a nop.
+  // ARMv6{K/T2} and v7 have an actual NOP instruction but it serializes
+  // some of the CPU's pipeline and has to issue. Older ARM chips simply used
+  // MOV Rx, Rx as NOP and it performs better even in newer CPUs.
+  // We therefore use MOV Rx, Rx, even on newer CPUs, and use Rx to encode
+  // a type.
+  ASSERT(0 <= type && type <= 14);  // mov pc, pc isn't a nop.
   emit(al | 13*B21 | type*B12 | type);
 }
 
 
+bool Assembler::IsMovT(Instr instr) {
+  instr &= ~(((kNumberOfConditions - 1) << 28) |  // Mask off conditions
+             ((kNumRegisters-1)*B12) |            // mask out register
+             EncodeMovwImmediate(0xFFFF));        // mask out immediate value
+  return instr == 0x34*B20;
+}
+
+
+bool Assembler::IsMovW(Instr instr) {
+  instr &= ~(((kNumberOfConditions - 1) << 28) |  // Mask off conditions
+             ((kNumRegisters-1)*B12) |            // mask out destination
+             EncodeMovwImmediate(0xFFFF));        // mask out immediate value
+  return instr == 0x30*B20;
+}
+
+
 bool Assembler::IsNop(Instr instr, int type) {
+  ASSERT(0 <= type && type <= 14);  // mov pc, pc isn't a nop.
   // Check for mov rx, rx where x = type.
-  ASSERT(0 <= type && type <= 14);  // mov pc, pc is not a nop.
   return instr == (al | 13*B21 | type*B12 | type);
 }
 
@@ -2532,18 +2582,21 @@ void Assembler::dd(uint32_t data) {
 }
 
 
-void Assembler::RecordRelocInfo(RelocInfo::Mode rmode, intptr_t data) {
+void Assembler::RecordRelocInfo(RelocInfo::Mode rmode, intptr_t data,
+                                UseConstantPoolMode mode) {
   // We do not try to reuse pool constants.
   RelocInfo rinfo(pc_, rmode, data, NULL);
   if (((rmode >= RelocInfo::JS_RETURN) &&
        (rmode <= RelocInfo::DEBUG_BREAK_SLOT)) ||
-      (rmode == RelocInfo::CONST_POOL)) {
+      (rmode == RelocInfo::CONST_POOL) ||
+      mode == DONT_USE_CONSTANT_POOL) {
     // Adjust code for new modes.
     ASSERT(RelocInfo::IsDebugBreakSlot(rmode)
            || RelocInfo::IsJSReturn(rmode)
            || RelocInfo::IsComment(rmode)
            || RelocInfo::IsPosition(rmode)
-           || RelocInfo::IsConstPool(rmode));
+           || RelocInfo::IsConstPool(rmode)
+           || mode == DONT_USE_CONSTANT_POOL);
     // These modes do not need an entry in the constant pool.
   } else {
     ASSERT(num_pending_reloc_info_ < kMaxNumPendingRelocInfo);
@@ -2648,9 +2701,9 @@ void Assembler::CheckConstPool(bool force_emit, bool require_jump) {
       b(&after_pool);
     }
 
-    // Put down constant pool marker "Undefined instruction" as specified by
-    // A5.6 (ARMv7) Instruction set encoding.
-    emit(kConstantPoolMarker | num_pending_reloc_info_);
+    // Put down constant pool marker "Undefined instruction".
+    emit(kConstantPoolMarker |
+         EncodeConstantPoolLength(num_pending_reloc_info_));
 
     // Emit constant pool entries.
     for (int i = 0; i < num_pending_reloc_info_; i++) {
@@ -2662,17 +2715,19 @@ void Assembler::CheckConstPool(bool force_emit, bool require_jump) {
 
       Instr instr = instr_at(rinfo.pc());
       // Instruction to patch must be 'ldr rd, [pc, #offset]' with offset == 0.
-      ASSERT(IsLdrPcImmediateOffset(instr) &&
-             GetLdrRegisterImmediateOffset(instr) == 0);
-
-      int delta = pc_ - rinfo.pc() - kPcLoadDelta;
-      // 0 is the smallest delta:
-      //   ldr rd, [pc, #0]
-      //   constant pool marker
-      //   data
-      ASSERT(is_uint12(delta));
-
-      instr_at_put(rinfo.pc(), SetLdrRegisterImmediateOffset(instr, delta));
+      if (IsLdrPcImmediateOffset(instr) &&
+          GetLdrRegisterImmediateOffset(instr) == 0) {
+        int delta = pc_ - rinfo.pc() - kPcLoadDelta;
+        // 0 is the smallest delta:
+        //   ldr rd, [pc, #0]
+        //   constant pool marker
+        //   data
+        ASSERT(is_uint12(delta));
+
+        instr_at_put(rinfo.pc(), SetLdrRegisterImmediateOffset(instr, delta));
+      } else {
+        ASSERT(IsMovW(instr));
+      }
       emit(rinfo.data());
     }
 
diff --git a/deps/v8/src/arm/assembler-arm.h b/deps/v8/src/arm/assembler-arm.h
index 7f2ce30aee..3b9bb804fd 100644
--- a/deps/v8/src/arm/assembler-arm.h
+++ b/deps/v8/src/arm/assembler-arm.h
@@ -425,7 +425,7 @@ class Operand BASE_EMBEDDED {
   // actual instruction to use is required for this calculation. For other
   // instructions instr is ignored.
   bool is_single_instruction(const Assembler* assembler, Instr instr = 0) const;
-  bool must_use_constant_pool(const Assembler* assembler) const;
+  bool must_output_reloc_info(const Assembler* assembler) const;
 
   inline int32_t immediate() const {
     ASSERT(!rm_.is_valid());
@@ -511,6 +511,10 @@ class CpuFeatures : public AllStatic {
     ASSERT(initialized_);
     if (f == VFP3 && !FLAG_enable_vfp3) return false;
     if (f == VFP2 && !FLAG_enable_vfp2) return false;
+    if (f == SUDIV && !FLAG_enable_sudiv) return false;
+    if (f == UNALIGNED_ACCESSES && !FLAG_enable_unaligned_accesses) {
+      return false;
+    }
     return (supported_ & (1u << f)) != 0;
   }
 
@@ -643,15 +647,7 @@ class Assembler : public AssemblerBase {
   // is too small, a fatal error occurs. No deallocation of the buffer is done
   // upon destruction of the assembler.
   Assembler(Isolate* isolate, void* buffer, int buffer_size);
-  ~Assembler();
-
-  // Overrides the default provided by FLAG_debug_code.
-  void set_emit_debug_code(bool value) { emit_debug_code_ = value; }
-
-  // Avoids using instructions that vary in size in unpredictable ways between
-  // the snapshot and the running VM.  This is needed by the full compiler so
-  // that it can recompile code with debug support and fix the PC.
-  void set_predictable_code_size(bool value) { predictable_code_size_ = value; }
+  virtual ~Assembler();
 
   // GetCode emits any pending (non-emitted) code and fills the descriptor
   // desc. GetCode() is idempotent; it returns the same result if no other
@@ -685,13 +681,25 @@ class Assembler : public AssemblerBase {
   void label_at_put(Label* L, int at_offset);
 
   // Return the address in the constant pool of the code target address used by
-  // the branch/call instruction at pc.
-  INLINE(static Address target_address_address_at(Address pc));
+  // the branch/call instruction at pc, or the object in a mov.
+  INLINE(static Address target_pointer_address_at(Address pc));
+
+  // Read/Modify the pointer in the branch/call/move instruction at pc.
+  INLINE(static Address target_pointer_at(Address pc));
+  INLINE(static void set_target_pointer_at(Address pc, Address target));
 
   // Read/Modify the code target address in the branch/call instruction at pc.
   INLINE(static Address target_address_at(Address pc));
   INLINE(static void set_target_address_at(Address pc, Address target));
 
+  // Return the code target address at a call site from the return address
+  // of that call in the instruction stream.
+  INLINE(static Address target_address_from_return_address(Address pc));
+
+  // Given the address of the beginning of a call, return the address
+  // in the instruction stream that the call will return from.
+  INLINE(static Address return_address_from_call_start(Address pc));
+
   // This sets the branch destination (which is in the constant pool on ARM).
   // This is for calls and branches within generated code.
   inline static void deserialization_set_special_target_at(
@@ -710,22 +718,6 @@ class Assembler : public AssemblerBase {
   // Size of an instruction.
   static const int kInstrSize = sizeof(Instr);
 
-  // Distance between the instruction referring to the address of the call
-  // target and the return address.
-#ifdef USE_BLX
-  // Call sequence is:
-  //  ldr  ip, [pc, #...] @ call address
-  //  blx  ip
-  //                      @ return address
-  static const int kCallTargetAddressOffset = 2 * kInstrSize;
-#else
-  // Call sequence is:
-  //  mov  lr, pc
-  //  ldr  pc, [pc, #...] @ call address
-  //                      @ return address
-  static const int kCallTargetAddressOffset = kInstrSize;
-#endif
-
   // Distance between start of patched return sequence and the emitted address
   // to jump to.
 #ifdef USE_BLX
@@ -754,6 +746,12 @@ class Assembler : public AssemblerBase {
   static const int kPatchDebugBreakSlotAddressOffset =  kInstrSize;
 #endif
 
+#ifdef USE_BLX
+  static const int kPatchDebugBreakSlotReturnOffset = 2 * kInstrSize;
+#else
+  static const int kPatchDebugBreakSlotReturnOffset = kInstrSize;
+#endif
+
   // Difference between address of current opcode and value read from pc
   // register.
   static const int kPcLoadDelta = 8;
@@ -869,6 +867,12 @@ class Assembler : public AssemblerBase {
   void mla(Register dst, Register src1, Register src2, Register srcA,
            SBit s = LeaveCC, Condition cond = al);
 
+  void mls(Register dst, Register src1, Register src2, Register srcA,
+           Condition cond = al);
+
+  void sdiv(Register dst, Register src1, Register src2,
+            Condition cond = al);
+
   void mul(Register dst, Register src1, Register src2,
            SBit s = LeaveCC, Condition cond = al);
 
@@ -1053,6 +1057,7 @@ class Assembler : public AssemblerBase {
 
   void vmov(const DwVfpRegister dst,
             double imm,
+            const Register scratch = no_reg,
             const Condition cond = al);
   void vmov(const SwVfpRegister dst,
             const SwVfpRegister src,
@@ -1121,6 +1126,10 @@ class Assembler : public AssemblerBase {
             const DwVfpRegister src1,
             const DwVfpRegister src2,
             const Condition cond = al);
+  void vmla(const DwVfpRegister dst,
+            const DwVfpRegister src1,
+            const DwVfpRegister src2,
+            const Condition cond = al);
   void vdiv(const DwVfpRegister dst,
             const DwVfpRegister src1,
             const DwVfpRegister src2,
@@ -1172,7 +1181,19 @@ class Assembler : public AssemblerBase {
   // Jump unconditionally to given label.
   void jmp(Label* L) { b(L, al); }
 
-  bool predictable_code_size() const { return predictable_code_size_; }
+  static bool use_immediate_embedded_pointer_loads(
+      const Assembler* assembler) {
+#ifdef USE_BLX
+    return CpuFeatures::IsSupported(MOVW_MOVT_IMMEDIATE_LOADS) &&
+        (assembler == NULL || !assembler->predictable_code_size());
+#else
+    // If not using BLX, all loads from the constant pool cannot be immediate,
+    // because the ldr pc, [pc + #xxxx] used for calls must be a single
+    // instruction and cannot be easily distinguished out of context from
+    // other loads that could use movw/movt.
+    return false;
+#endif
+  }
 
   // Check the code size generated from label to here.
   int SizeOfCodeGeneratedSince(Label* label) {
@@ -1255,8 +1276,6 @@ class Assembler : public AssemblerBase {
   void db(uint8_t data);
   void dd(uint32_t data);
 
-  int pc_offset() const { return pc_ - buffer_; }
-
   PositionsRecorder* positions_recorder() { return &positions_recorder_; }
 
   // Read/patch instructions
@@ -1294,12 +1313,16 @@ class Assembler : public AssemblerBase {
   static Register GetCmpImmediateRegister(Instr instr);
   static int GetCmpImmediateRawImmediate(Instr instr);
   static bool IsNop(Instr instr, int type = NON_MARKING_NOP);
+  static bool IsMovT(Instr instr);
+  static bool IsMovW(Instr instr);
 
   // Constants in pools are accessed via pc relative addressing, which can
   // reach +/-4KB thereby defining a maximum distance between the instruction
   // and the accessed constant.
   static const int kMaxDistToPool = 4*KB;
   static const int kMaxNumPendingRelocInfo = kMaxDistToPool/kInstrSize;
+  STATIC_ASSERT((kConstantPoolLengthMaxMask & kMaxNumPendingRelocInfo) ==
+                kMaxNumPendingRelocInfo);
 
   // Postpone the generation of the constant pool for the specified number of
   // instructions.
@@ -1314,8 +1337,6 @@ class Assembler : public AssemblerBase {
   // the relocation info.
   TypeFeedbackId recorded_ast_id_;
 
-  bool emit_debug_code() const { return emit_debug_code_; }
-
   int buffer_space() const { return reloc_info_writer.pos() - pc_; }
 
   // Decode branch instruction at pos and return branch target pos
@@ -1357,13 +1378,6 @@ class Assembler : public AssemblerBase {
   }
 
  private:
-  // Code buffer:
-  // The buffer into which code and relocation info are generated.
-  byte* buffer_;
-  int buffer_size_;
-  // True if the assembler owns the buffer, false if buffer is external.
-  bool own_buffer_;
-
   int next_buffer_check_;  // pc offset of next buffer check
 
   // Code generation
@@ -1372,7 +1386,6 @@ class Assembler : public AssemblerBase {
   // not have to check for overflow. The same is true for writes of large
   // relocation info entries.
   static const int kGap = 32;
-  byte* pc_;  // the program counter; moves forward
 
   // Constant pool generation
   // Pools are emitted in the instruction stream, preferably after unconditional
@@ -1432,6 +1445,12 @@ class Assembler : public AssemblerBase {
   void GrowBuffer();
   inline void emit(Instr x);
 
+  // 32-bit immediate values
+  void move_32_bit_immediate(Condition cond,
+                             Register rd,
+                             SBit s,
+                             const Operand& x);
+
   // Instruction generation
   void addrmod1(Instr instr, Register rn, Register rd, const Operand& x);
   void addrmod2(Instr instr, Register rd, const MemOperand& x);
@@ -1445,8 +1464,14 @@ class Assembler : public AssemblerBase {
   void link_to(Label* L, Label* appendix);
   void next(Label* L);
 
+  enum UseConstantPoolMode {
+    USE_CONSTANT_POOL,
+    DONT_USE_CONSTANT_POOL
+  };
+
   // Record reloc info for current pc_
-  void RecordRelocInfo(RelocInfo::Mode rmode, intptr_t data = 0);
+  void RecordRelocInfo(RelocInfo::Mode rmode, intptr_t data = 0,
+                       UseConstantPoolMode mode = USE_CONSTANT_POOL);
 
   friend class RegExpMacroAssemblerARM;
   friend class RelocInfo;
@@ -1454,10 +1479,6 @@ class Assembler : public AssemblerBase {
   friend class BlockConstPoolScope;
 
   PositionsRecorder positions_recorder_;
-
-  bool emit_debug_code_;
-  bool predictable_code_size_;
-
   friend class PositionsRecorder;
   friend class EnsureSpace;
 };
diff --git a/deps/v8/src/arm/builtins-arm.cc b/deps/v8/src/arm/builtins-arm.cc
index 2d1d7b1199..24d14e8c8a 100644
--- a/deps/v8/src/arm/builtins-arm.cc
+++ b/deps/v8/src/arm/builtins-arm.cc
@@ -1226,6 +1226,39 @@ void Builtins::Generate_LazyRecompile(MacroAssembler* masm) {
 }
 
 
+static void GenerateMakeCodeYoungAgainCommon(MacroAssembler* masm) {
+  // For now, we are relying on the fact that make_code_young doesn't do any
+  // garbage collection which allows us to save/restore the registers without
+  // worrying about which of them contain pointers. We also don't build an
+  // internal frame to make the code faster, since we shouldn't have to do stack
+  // crawls in MakeCodeYoung. This seems a bit fragile.
+
+  // The following registers must be saved and restored when calling through to
+  // the runtime:
+  //   r0 - contains return address (beginning of patch sequence)
+  //   r1 - function object
+  FrameScope scope(masm, StackFrame::MANUAL);
+  __ stm(db_w, sp, r0.bit() | r1.bit() | fp.bit() | lr.bit());
+  __ PrepareCallCFunction(1, 0, r1);
+  __ CallCFunction(
+      ExternalReference::get_make_code_young_function(masm->isolate()), 1);
+  __ ldm(ia_w, sp, r0.bit() | r1.bit() | fp.bit() | lr.bit());
+  __ mov(pc, r0);
+}
+
+#define DEFINE_CODE_AGE_BUILTIN_GENERATOR(C)                 \
+void Builtins::Generate_Make##C##CodeYoungAgainEvenMarking(  \
+    MacroAssembler* masm) {                                  \
+  GenerateMakeCodeYoungAgainCommon(masm);                    \
+}                                                            \
+void Builtins::Generate_Make##C##CodeYoungAgainOddMarking(   \
+    MacroAssembler* masm) {                                  \
+  GenerateMakeCodeYoungAgainCommon(masm);                    \
+}
+CODE_AGE_LIST(DEFINE_CODE_AGE_BUILTIN_GENERATOR)
+#undef DEFINE_CODE_AGE_BUILTIN_GENERATOR
+
+
 static void Generate_NotifyDeoptimizedHelper(MacroAssembler* masm,
                                              Deoptimizer::BailoutType type) {
   {
diff --git a/deps/v8/src/arm/code-stubs-arm.cc b/deps/v8/src/arm/code-stubs-arm.cc
index 5bb2116263..9484f85f97 100644
--- a/deps/v8/src/arm/code-stubs-arm.cc
+++ b/deps/v8/src/arm/code-stubs-arm.cc
@@ -41,8 +41,7 @@ namespace internal {
 
 static void EmitIdenticalObjectComparison(MacroAssembler* masm,
                                           Label* slow,
-                                          Condition cond,
-                                          bool never_nan_nan);
+                                          Condition cond);
 static void EmitSmiNonsmiComparison(MacroAssembler* masm,
                                     Register lhs,
                                     Register rhs,
@@ -627,24 +626,6 @@ void FloatingPointHelper::LoadSmis(MacroAssembler* masm,
 }
 
 
-void FloatingPointHelper::LoadOperands(
-    MacroAssembler* masm,
-    FloatingPointHelper::Destination destination,
-    Register heap_number_map,
-    Register scratch1,
-    Register scratch2,
-    Label* slow) {
-
-  // Load right operand (r0) to d6 or r2/r3.
-  LoadNumber(masm, destination,
-             r0, d7, r2, r3, heap_number_map, scratch1, scratch2, slow);
-
-  // Load left operand (r1) to d7 or r0/r1.
-  LoadNumber(masm, destination,
-             r1, d6, r0, r1, heap_number_map, scratch1, scratch2, slow);
-}
-
-
 void FloatingPointHelper::LoadNumber(MacroAssembler* masm,
                                      Destination destination,
                                      Register object,
@@ -655,11 +636,9 @@ void FloatingPointHelper::LoadNumber(MacroAssembler* masm,
                                      Register scratch1,
                                      Register scratch2,
                                      Label* not_number) {
-  if (FLAG_debug_code) {
-    __ AbortIfNotRootValue(heap_number_map,
-                           Heap::kHeapNumberMapRootIndex,
-                           "HeapNumberMap register clobbered.");
-  }
+  __ AssertRootValue(heap_number_map,
+                     Heap::kHeapNumberMapRootIndex,
+                     "HeapNumberMap register clobbered.");
 
   Label is_smi, done;
 
@@ -716,11 +695,9 @@ void FloatingPointHelper::ConvertNumberToInt32(MacroAssembler* masm,
                                                Register scratch3,
                                                DwVfpRegister double_scratch,
                                                Label* not_number) {
-  if (FLAG_debug_code) {
-    __ AbortIfNotRootValue(heap_number_map,
-                           Heap::kHeapNumberMapRootIndex,
-                           "HeapNumberMap register clobbered.");
-  }
+  __ AssertRootValue(heap_number_map,
+                     Heap::kHeapNumberMapRootIndex,
+                     "HeapNumberMap register clobbered.");
   Label done;
   Label not_in_int32_range;
 
@@ -752,13 +729,13 @@ void FloatingPointHelper::ConvertIntToDouble(MacroAssembler* masm,
                                              Register int_scratch,
                                              Destination destination,
                                              DwVfpRegister double_dst,
-                                             Register dst1,
-                                             Register dst2,
+                                             Register dst_mantissa,
+                                             Register dst_exponent,
                                              Register scratch2,
                                              SwVfpRegister single_scratch) {
   ASSERT(!int_scratch.is(scratch2));
-  ASSERT(!int_scratch.is(dst1));
-  ASSERT(!int_scratch.is(dst2));
+  ASSERT(!int_scratch.is(dst_mantissa));
+  ASSERT(!int_scratch.is(dst_exponent));
 
   Label done;
 
@@ -767,56 +744,57 @@ void FloatingPointHelper::ConvertIntToDouble(MacroAssembler* masm,
     __ vmov(single_scratch, int_scratch);
     __ vcvt_f64_s32(double_dst, single_scratch);
     if (destination == kCoreRegisters) {
-      __ vmov(dst1, dst2, double_dst);
+      __ vmov(dst_mantissa, dst_exponent, double_dst);
     }
   } else {
     Label fewer_than_20_useful_bits;
     // Expected output:
-    // |         dst2            |         dst1            |
+    // |       dst_exponent      |       dst_mantissa      |
     // | s |   exp   |              mantissa               |
 
     // Check for zero.
     __ cmp(int_scratch, Operand::Zero());
-    __ mov(dst2, int_scratch);
-    __ mov(dst1, int_scratch);
+    __ mov(dst_exponent, int_scratch);
+    __ mov(dst_mantissa, int_scratch);
     __ b(eq, &done);
 
     // Preload the sign of the value.
-    __ and_(dst2, int_scratch, Operand(HeapNumber::kSignMask), SetCC);
+    __ and_(dst_exponent, int_scratch, Operand(HeapNumber::kSignMask), SetCC);
     // Get the absolute value of the object (as an unsigned integer).
     __ rsb(int_scratch, int_scratch, Operand::Zero(), SetCC, mi);
 
     // Get mantissa[51:20].
 
     // Get the position of the first set bit.
-    __ CountLeadingZeros(dst1, int_scratch, scratch2);
-    __ rsb(dst1, dst1, Operand(31));
+    __ CountLeadingZeros(dst_mantissa, int_scratch, scratch2);
+    __ rsb(dst_mantissa, dst_mantissa, Operand(31));
 
     // Set the exponent.
-    __ add(scratch2, dst1, Operand(HeapNumber::kExponentBias));
-    __ Bfi(dst2, scratch2, scratch2,
+    __ add(scratch2, dst_mantissa, Operand(HeapNumber::kExponentBias));
+    __ Bfi(dst_exponent, scratch2, scratch2,
         HeapNumber::kExponentShift, HeapNumber::kExponentBits);
 
     // Clear the first non null bit.
     __ mov(scratch2, Operand(1));
-    __ bic(int_scratch, int_scratch, Operand(scratch2, LSL, dst1));
+    __ bic(int_scratch, int_scratch, Operand(scratch2, LSL, dst_mantissa));
 
-    __ cmp(dst1, Operand(HeapNumber::kMantissaBitsInTopWord));
+    __ cmp(dst_mantissa, Operand(HeapNumber::kMantissaBitsInTopWord));
     // Get the number of bits to set in the lower part of the mantissa.
-    __ sub(scratch2, dst1, Operand(HeapNumber::kMantissaBitsInTopWord), SetCC);
+    __ sub(scratch2, dst_mantissa, Operand(HeapNumber::kMantissaBitsInTopWord),
+           SetCC);
     __ b(mi, &fewer_than_20_useful_bits);
     // Set the higher 20 bits of the mantissa.
-    __ orr(dst2, dst2, Operand(int_scratch, LSR, scratch2));
+    __ orr(dst_exponent, dst_exponent, Operand(int_scratch, LSR, scratch2));
     __ rsb(scratch2, scratch2, Operand(32));
-    __ mov(dst1, Operand(int_scratch, LSL, scratch2));
+    __ mov(dst_mantissa, Operand(int_scratch, LSL, scratch2));
     __ b(&done);
 
     __ bind(&fewer_than_20_useful_bits);
-    __ rsb(scratch2, dst1, Operand(HeapNumber::kMantissaBitsInTopWord));
+    __ rsb(scratch2, dst_mantissa, Operand(HeapNumber::kMantissaBitsInTopWord));
     __ mov(scratch2, Operand(int_scratch, LSL, scratch2));
-    __ orr(dst2, dst2, scratch2);
+    __ orr(dst_exponent, dst_exponent, scratch2);
     // Set dst1 to 0.
-    __ mov(dst1, Operand::Zero());
+    __ mov(dst_mantissa, Operand::Zero());
   }
   __ bind(&done);
 }
@@ -826,8 +804,9 @@ void FloatingPointHelper::LoadNumberAsInt32Double(MacroAssembler* masm,
                                                   Register object,
                                                   Destination destination,
                                                   DwVfpRegister double_dst,
-                                                  Register dst1,
-                                                  Register dst2,
+                                                  DwVfpRegister double_scratch,
+                                                  Register dst_mantissa,
+                                                  Register dst_exponent,
                                                   Register heap_number_map,
                                                   Register scratch1,
                                                   Register scratch2,
@@ -843,16 +822,14 @@ void FloatingPointHelper::LoadNumberAsInt32Double(MacroAssembler* masm,
 
   __ JumpIfNotSmi(object, &obj_is_not_smi);
   __ SmiUntag(scratch1, object);
-  ConvertIntToDouble(masm, scratch1, destination, double_dst, dst1, dst2,
-                     scratch2, single_scratch);
+  ConvertIntToDouble(masm, scratch1, destination, double_dst, dst_mantissa,
+                     dst_exponent, scratch2, single_scratch);
   __ b(&done);
 
   __ bind(&obj_is_not_smi);
-  if (FLAG_debug_code) {
-    __ AbortIfNotRootValue(heap_number_map,
-                           Heap::kHeapNumberMapRootIndex,
-                           "HeapNumberMap register clobbered.");
-  }
+  __ AssertRootValue(heap_number_map,
+                     Heap::kHeapNumberMapRootIndex,
+                     "HeapNumberMap register clobbered.");
   __ JumpIfNotHeapNumber(object, heap_number_map, scratch1, not_int32);
 
   // Load the number.
@@ -863,36 +840,62 @@ void FloatingPointHelper::LoadNumberAsInt32Double(MacroAssembler* masm,
     __ vldr(double_dst, scratch1, HeapNumber::kValueOffset);
 
     __ EmitVFPTruncate(kRoundToZero,
-                       single_scratch,
-                       double_dst,
                        scratch1,
+                       double_dst,
                        scratch2,
+                       double_scratch,
                        kCheckForInexactConversion);
 
     // Jump to not_int32 if the operation did not succeed.
     __ b(ne, not_int32);
 
     if (destination == kCoreRegisters) {
-      __ vmov(dst1, dst2, double_dst);
+      __ vmov(dst_mantissa, dst_exponent, double_dst);
     }
 
   } else {
     ASSERT(!scratch1.is(object) && !scratch2.is(object));
-    // Load the double value in the destination registers..
-    __ Ldrd(dst1, dst2, FieldMemOperand(object, HeapNumber::kValueOffset));
+    // Load the double value in the destination registers.
+    bool save_registers = object.is(dst_mantissa) || object.is(dst_exponent);
+    if (save_registers) {
+      // Save both output registers, because the other one probably holds
+      // an important value too.
+      __ Push(dst_exponent, dst_mantissa);
+    }
+    __ Ldrd(dst_mantissa, dst_exponent,
+            FieldMemOperand(object, HeapNumber::kValueOffset));
 
     // Check for 0 and -0.
-    __ bic(scratch1, dst1, Operand(HeapNumber::kSignMask));
-    __ orr(scratch1, scratch1, Operand(dst2));
+    Label zero;
+    __ bic(scratch1, dst_exponent, Operand(HeapNumber::kSignMask));
+    __ orr(scratch1, scratch1, Operand(dst_mantissa));
     __ cmp(scratch1, Operand::Zero());
-    __ b(eq, &done);
+    __ b(eq, &zero);
 
     // Check that the value can be exactly represented by a 32-bit integer.
     // Jump to not_int32 if that's not the case.
-    DoubleIs32BitInteger(masm, dst1, dst2, scratch1, scratch2, not_int32);
+    Label restore_input_and_miss;
+    DoubleIs32BitInteger(masm, dst_exponent, dst_mantissa, scratch1, scratch2,
+                         &restore_input_and_miss);
 
-    // dst1 and dst2 were trashed. Reload the double value.
-    __ Ldrd(dst1, dst2, FieldMemOperand(object, HeapNumber::kValueOffset));
+    // dst_* were trashed. Reload the double value.
+    if (save_registers) {
+      __ Pop(dst_exponent, dst_mantissa);
+    }
+    __ Ldrd(dst_mantissa, dst_exponent,
+            FieldMemOperand(object, HeapNumber::kValueOffset));
+    __ b(&done);
+
+    __ bind(&restore_input_and_miss);
+    if (save_registers) {
+      __ Pop(dst_exponent, dst_mantissa);
+    }
+    __ b(not_int32);
+
+    __ bind(&zero);
+    if (save_registers) {
+      __ Drop(2);
+    }
   }
 
   __ bind(&done);
@@ -906,7 +909,8 @@ void FloatingPointHelper::LoadNumberAsInt32(MacroAssembler* masm,
                                             Register scratch1,
                                             Register scratch2,
                                             Register scratch3,
-                                            DwVfpRegister double_scratch,
+                                            DwVfpRegister double_scratch0,
+                                            DwVfpRegister double_scratch1,
                                             Label* not_int32) {
   ASSERT(!dst.is(object));
   ASSERT(!scratch1.is(object) && !scratch2.is(object) && !scratch3.is(object));
@@ -914,38 +918,34 @@ void FloatingPointHelper::LoadNumberAsInt32(MacroAssembler* masm,
          !scratch1.is(scratch3) &&
          !scratch2.is(scratch3));
 
-  Label done;
+  Label done, maybe_undefined;
 
   __ UntagAndJumpIfSmi(dst, object, &done);
 
-  if (FLAG_debug_code) {
-    __ AbortIfNotRootValue(heap_number_map,
-                           Heap::kHeapNumberMapRootIndex,
-                           "HeapNumberMap register clobbered.");
-  }
-  __ JumpIfNotHeapNumber(object, heap_number_map, scratch1, not_int32);
+  __ AssertRootValue(heap_number_map,
+                     Heap::kHeapNumberMapRootIndex,
+                     "HeapNumberMap register clobbered.");
+
+  __ JumpIfNotHeapNumber(object, heap_number_map, scratch1, &maybe_undefined);
 
   // Object is a heap number.
   // Convert the floating point value to a 32-bit integer.
   if (CpuFeatures::IsSupported(VFP2)) {
     CpuFeatures::Scope scope(VFP2);
-    SwVfpRegister single_scratch = double_scratch.low();
+
     // Load the double value.
     __ sub(scratch1, object, Operand(kHeapObjectTag));
-    __ vldr(double_scratch, scratch1, HeapNumber::kValueOffset);
+    __ vldr(double_scratch0, scratch1, HeapNumber::kValueOffset);
 
     __ EmitVFPTruncate(kRoundToZero,
-                       single_scratch,
-                       double_scratch,
+                       dst,
+                       double_scratch0,
                        scratch1,
-                       scratch2,
+                       double_scratch1,
                        kCheckForInexactConversion);
 
     // Jump to not_int32 if the operation did not succeed.
     __ b(ne, not_int32);
-    // Get the result in the destination register.
-    __ vmov(dst, single_scratch);
-
   } else {
     // Load the double value in the destination registers.
     __ ldr(scratch1, FieldMemOperand(object, HeapNumber::kExponentOffset));
@@ -973,20 +973,28 @@ void FloatingPointHelper::LoadNumberAsInt32(MacroAssembler* masm,
     __ tst(scratch1, Operand(HeapNumber::kSignMask));
     __ rsb(dst, dst, Operand::Zero(), LeaveCC, mi);
   }
+  __ b(&done);
+
+  __ bind(&maybe_undefined);
+  __ CompareRoot(object, Heap::kUndefinedValueRootIndex);
+  __ b(ne, not_int32);
+  // |undefined| is truncated to 0.
+  __ mov(dst, Operand(Smi::FromInt(0)));
+  // Fall through.
 
   __ bind(&done);
 }
 
 
 void FloatingPointHelper::DoubleIs32BitInteger(MacroAssembler* masm,
-                                               Register src1,
-                                               Register src2,
+                                               Register src_exponent,
+                                               Register src_mantissa,
                                                Register dst,
                                                Register scratch,
                                                Label* not_int32) {
   // Get exponent alone in scratch.
   __ Ubfx(scratch,
-          src1,
+          src_exponent,
           HeapNumber::kExponentShift,
           HeapNumber::kExponentBits);
 
@@ -1006,11 +1014,11 @@ void FloatingPointHelper::DoubleIs32BitInteger(MacroAssembler* masm,
   // Another way to put it is that if (exponent - signbit) > 30 then the
   // number cannot be represented as an int32.
   Register tmp = dst;
-  __ sub(tmp, scratch, Operand(src1, LSR, 31));
+  __ sub(tmp, scratch, Operand(src_exponent, LSR, 31));
   __ cmp(tmp, Operand(30));
   __ b(gt, not_int32);
   // - Bits [21:0] in the mantissa are not null.
-  __ tst(src2, Operand(0x3fffff));
+  __ tst(src_mantissa, Operand(0x3fffff));
   __ b(ne, not_int32);
 
   // Otherwise the exponent needs to be big enough to shift left all the
@@ -1021,19 +1029,19 @@ void FloatingPointHelper::DoubleIs32BitInteger(MacroAssembler* masm,
 
   // Get the 32 higher bits of the mantissa in dst.
   __ Ubfx(dst,
-          src2,
+          src_mantissa,
           HeapNumber::kMantissaBitsInTopWord,
           32 - HeapNumber::kMantissaBitsInTopWord);
   __ orr(dst,
          dst,
-         Operand(src1, LSL, HeapNumber::kNonMantissaBitsInTopWord));
+         Operand(src_exponent, LSL, HeapNumber::kNonMantissaBitsInTopWord));
 
   // Create the mask and test the lower bits (of the higher bits).
   __ rsb(scratch, scratch, Operand(32));
-  __ mov(src2, Operand(1));
-  __ mov(src1, Operand(src2, LSL, scratch));
-  __ sub(src1, src1, Operand(1));
-  __ tst(dst, src1);
+  __ mov(src_mantissa, Operand(1));
+  __ mov(src_exponent, Operand(src_mantissa, LSL, scratch));
+  __ sub(src_exponent, src_exponent, Operand(1));
+  __ tst(dst, src_exponent);
   __ b(ne, not_int32);
 }
 
@@ -1157,48 +1165,43 @@ void WriteInt32ToHeapNumberStub::Generate(MacroAssembler* masm) {
 // for "identity and not NaN".
 static void EmitIdenticalObjectComparison(MacroAssembler* masm,
                                           Label* slow,
-                                          Condition cond,
-                                          bool never_nan_nan) {
+                                          Condition cond) {
   Label not_identical;
   Label heap_number, return_equal;
   __ cmp(r0, r1);
   __ b(ne, &not_identical);
 
-  // The two objects are identical.  If we know that one of them isn't NaN then
-  // we now know they test equal.
-  if (cond != eq || !never_nan_nan) {
-    // Test for NaN. Sadly, we can't just compare to FACTORY->nan_value(),
-    // so we do the second best thing - test it ourselves.
-    // They are both equal and they are not both Smis so both of them are not
-    // Smis.  If it's not a heap number, then return equal.
-    if (cond == lt || cond == gt) {
-      __ CompareObjectType(r0, r4, r4, FIRST_SPEC_OBJECT_TYPE);
+  // Test for NaN. Sadly, we can't just compare to FACTORY->nan_value(),
+  // so we do the second best thing - test it ourselves.
+  // They are both equal and they are not both Smis so both of them are not
+  // Smis.  If it's not a heap number, then return equal.
+  if (cond == lt || cond == gt) {
+    __ CompareObjectType(r0, r4, r4, FIRST_SPEC_OBJECT_TYPE);
+    __ b(ge, slow);
+  } else {
+    __ CompareObjectType(r0, r4, r4, HEAP_NUMBER_TYPE);
+    __ b(eq, &heap_number);
+    // Comparing JS objects with <=, >= is complicated.
+    if (cond != eq) {
+      __ cmp(r4, Operand(FIRST_SPEC_OBJECT_TYPE));
       __ b(ge, slow);
-    } else {
-      __ CompareObjectType(r0, r4, r4, HEAP_NUMBER_TYPE);
-      __ b(eq, &heap_number);
-      // Comparing JS objects with <=, >= is complicated.
-      if (cond != eq) {
-        __ cmp(r4, Operand(FIRST_SPEC_OBJECT_TYPE));
-        __ b(ge, slow);
-        // Normally here we fall through to return_equal, but undefined is
-        // special: (undefined == undefined) == true, but
-        // (undefined <= undefined) == false!  See ECMAScript 11.8.5.
-        if (cond == le || cond == ge) {
-          __ cmp(r4, Operand(ODDBALL_TYPE));
-          __ b(ne, &return_equal);
-          __ LoadRoot(r2, Heap::kUndefinedValueRootIndex);
-          __ cmp(r0, r2);
-          __ b(ne, &return_equal);
-          if (cond == le) {
-            // undefined <= undefined should fail.
-            __ mov(r0, Operand(GREATER));
-          } else  {
-            // undefined >= undefined should fail.
-            __ mov(r0, Operand(LESS));
-          }
-          __ Ret();
+      // Normally here we fall through to return_equal, but undefined is
+      // special: (undefined == undefined) == true, but
+      // (undefined <= undefined) == false!  See ECMAScript 11.8.5.
+      if (cond == le || cond == ge) {
+        __ cmp(r4, Operand(ODDBALL_TYPE));
+        __ b(ne, &return_equal);
+        __ LoadRoot(r2, Heap::kUndefinedValueRootIndex);
+        __ cmp(r0, r2);
+        __ b(ne, &return_equal);
+        if (cond == le) {
+          // undefined <= undefined should fail.
+          __ mov(r0, Operand(GREATER));
+        } else  {
+          // undefined >= undefined should fail.
+          __ mov(r0, Operand(LESS));
         }
+        __ Ret();
       }
     }
   }
@@ -1213,47 +1216,45 @@ static void EmitIdenticalObjectComparison(MacroAssembler* masm,
   }
   __ Ret();
 
-  if (cond != eq || !never_nan_nan) {
-    // For less and greater we don't have to check for NaN since the result of
-    // x < x is false regardless.  For the others here is some code to check
-    // for NaN.
-    if (cond != lt && cond != gt) {
-      __ bind(&heap_number);
-      // It is a heap number, so return non-equal if it's NaN and equal if it's
-      // not NaN.
-
-      // The representation of NaN values has all exponent bits (52..62) set,
-      // and not all mantissa bits (0..51) clear.
-      // Read top bits of double representation (second word of value).
-      __ ldr(r2, FieldMemOperand(r0, HeapNumber::kExponentOffset));
-      // Test that exponent bits are all set.
-      __ Sbfx(r3, r2, HeapNumber::kExponentShift, HeapNumber::kExponentBits);
-      // NaNs have all-one exponents so they sign extend to -1.
-      __ cmp(r3, Operand(-1));
-      __ b(ne, &return_equal);
-
-      // Shift out flag and all exponent bits, retaining only mantissa.
-      __ mov(r2, Operand(r2, LSL, HeapNumber::kNonMantissaBitsInTopWord));
-      // Or with all low-bits of mantissa.
-      __ ldr(r3, FieldMemOperand(r0, HeapNumber::kMantissaOffset));
-      __ orr(r0, r3, Operand(r2), SetCC);
-      // For equal we already have the right value in r0:  Return zero (equal)
-      // if all bits in mantissa are zero (it's an Infinity) and non-zero if
-      // not (it's a NaN).  For <= and >= we need to load r0 with the failing
-      // value if it's a NaN.
-      if (cond != eq) {
-        // All-zero means Infinity means equal.
-        __ Ret(eq);
-        if (cond == le) {
-          __ mov(r0, Operand(GREATER));  // NaN <= NaN should fail.
-        } else {
-          __ mov(r0, Operand(LESS));     // NaN >= NaN should fail.
-        }
+  // For less and greater we don't have to check for NaN since the result of
+  // x < x is false regardless.  For the others here is some code to check
+  // for NaN.
+  if (cond != lt && cond != gt) {
+    __ bind(&heap_number);
+    // It is a heap number, so return non-equal if it's NaN and equal if it's
+    // not NaN.
+
+    // The representation of NaN values has all exponent bits (52..62) set,
+    // and not all mantissa bits (0..51) clear.
+    // Read top bits of double representation (second word of value).
+    __ ldr(r2, FieldMemOperand(r0, HeapNumber::kExponentOffset));
+    // Test that exponent bits are all set.
+    __ Sbfx(r3, r2, HeapNumber::kExponentShift, HeapNumber::kExponentBits);
+    // NaNs have all-one exponents so they sign extend to -1.
+    __ cmp(r3, Operand(-1));
+    __ b(ne, &return_equal);
+
+    // Shift out flag and all exponent bits, retaining only mantissa.
+    __ mov(r2, Operand(r2, LSL, HeapNumber::kNonMantissaBitsInTopWord));
+    // Or with all low-bits of mantissa.
+    __ ldr(r3, FieldMemOperand(r0, HeapNumber::kMantissaOffset));
+    __ orr(r0, r3, Operand(r2), SetCC);
+    // For equal we already have the right value in r0:  Return zero (equal)
+    // if all bits in mantissa are zero (it's an Infinity) and non-zero if
+    // not (it's a NaN).  For <= and >= we need to load r0 with the failing
+    // value if it's a NaN.
+    if (cond != eq) {
+      // All-zero means Infinity means equal.
+      __ Ret(eq);
+      if (cond == le) {
+        __ mov(r0, Operand(GREATER));  // NaN <= NaN should fail.
+      } else {
+        __ mov(r0, Operand(LESS));     // NaN >= NaN should fail.
       }
-      __ Ret();
     }
-    // No fall through here.
+    __ Ret();
   }
+  // No fall through here.
 
   __ bind(&not_identical);
 }
@@ -1687,42 +1688,60 @@ void NumberToStringStub::Generate(MacroAssembler* masm) {
 }
 
 
-// On entry lhs_ and rhs_ are the values to be compared.
+static void ICCompareStub_CheckInputType(MacroAssembler* masm,
+                                         Register input,
+                                         Register scratch,
+                                         CompareIC::State expected,
+                                         Label* fail) {
+  Label ok;
+  if (expected == CompareIC::SMI) {
+    __ JumpIfNotSmi(input, fail);
+  } else if (expected == CompareIC::HEAP_NUMBER) {
+    __ JumpIfSmi(input, &ok);
+    __ CheckMap(input, scratch, Heap::kHeapNumberMapRootIndex, fail,
+                DONT_DO_SMI_CHECK);
+  }
+  // We could be strict about symbol/string here, but as long as
+  // hydrogen doesn't care, the stub doesn't have to care either.
+  __ bind(&ok);
+}
+
+
+// On entry r1 and r2 are the values to be compared.
 // On exit r0 is 0, positive or negative to indicate the result of
 // the comparison.
-void CompareStub::Generate(MacroAssembler* masm) {
-  ASSERT((lhs_.is(r0) && rhs_.is(r1)) ||
-         (lhs_.is(r1) && rhs_.is(r0)));
+void ICCompareStub::GenerateGeneric(MacroAssembler* masm) {
+  Register lhs = r1;
+  Register rhs = r0;
+  Condition cc = GetCondition();
+
+  Label miss;
+  ICCompareStub_CheckInputType(masm, lhs, r2, left_, &miss);
+  ICCompareStub_CheckInputType(masm, rhs, r3, right_, &miss);
 
   Label slow;  // Call builtin.
   Label not_smis, both_loaded_as_doubles, lhs_not_nan;
 
-  if (include_smi_compare_) {
-    Label not_two_smis, smi_done;
-    __ orr(r2, r1, r0);
-    __ JumpIfNotSmi(r2, &not_two_smis);
-    __ mov(r1, Operand(r1, ASR, 1));
-    __ sub(r0, r1, Operand(r0, ASR, 1));
-    __ Ret();
-    __ bind(&not_two_smis);
-  } else if (FLAG_debug_code) {
-    __ orr(r2, r1, r0);
-    __ tst(r2, Operand(kSmiTagMask));
-    __ Assert(ne, "CompareStub: unexpected smi operands.");
-  }
+  Label not_two_smis, smi_done;
+  __ orr(r2, r1, r0);
+  __ JumpIfNotSmi(r2, &not_two_smis);
+  __ mov(r1, Operand(r1, ASR, 1));
+  __ sub(r0, r1, Operand(r0, ASR, 1));
+  __ Ret();
+  __ bind(&not_two_smis);
 
   // NOTICE! This code is only reached after a smi-fast-case check, so
   // it is certain that at least one operand isn't a smi.
 
   // Handle the case where the objects are identical.  Either returns the answer
   // or goes to slow.  Only falls through if the objects were not identical.
-  EmitIdenticalObjectComparison(masm, &slow, cc_, never_nan_nan_);
+  EmitIdenticalObjectComparison(masm, &slow, cc);
 
   // If either is a Smi (we know that not both are), then they can only
   // be strictly equal if the other is a HeapNumber.
   STATIC_ASSERT(kSmiTag == 0);
   ASSERT_EQ(0, Smi::FromInt(0));
-  __ and_(r2, lhs_, Operand(rhs_));
+  __ and_(r2, lhs, Operand(rhs));
   __ JumpIfNotSmi(r2, &not_smis);
   // One operand is a smi.  EmitSmiNonsmiComparison generates code that can:
   // 1) Return the answer.
@@ -1733,7 +1752,7 @@ void CompareStub::Generate(MacroAssembler* masm) {
   // comparison.  If VFP3 is supported the double values of the numbers have
   // been loaded into d7 and d6.  Otherwise, the double values have been loaded
   // into r0, r1, r2, and r3.
-  EmitSmiNonsmiComparison(masm, lhs_, rhs_, &lhs_not_nan, &slow, strict_);
+  EmitSmiNonsmiComparison(masm, lhs, rhs, &lhs_not_nan, &slow, strict());
 
   __ bind(&both_loaded_as_doubles);
   // The arguments have been converted to doubles and stored in d6 and d7, if
@@ -1756,7 +1775,7 @@ void CompareStub::Generate(MacroAssembler* masm) {
     // If one of the sides was a NaN then the v flag is set.  Load r0 with
     // whatever it takes to make the comparison fail, since comparisons with NaN
     // always fail.
-    if (cc_ == lt || cc_ == le) {
+    if (cc == lt || cc == le) {
       __ mov(r0, Operand(GREATER));
     } else {
       __ mov(r0, Operand(LESS));
@@ -1765,19 +1784,19 @@ void CompareStub::Generate(MacroAssembler* masm) {
   } else {
     // Checks for NaN in the doubles we have loaded.  Can return the answer or
     // fall through if neither is a NaN.  Also binds lhs_not_nan.
-    EmitNanCheck(masm, &lhs_not_nan, cc_);
+    EmitNanCheck(masm, &lhs_not_nan, cc);
     // Compares two doubles in r0, r1, r2, r3 that are not NaNs.  Returns the
     // answer.  Never falls through.
-    EmitTwoNonNanDoubleComparison(masm, cc_);
+    EmitTwoNonNanDoubleComparison(masm, cc);
   }
 
   __ bind(&not_smis);
   // At this point we know we are dealing with two different objects,
   // and neither of them is a Smi.  The objects are in rhs_ and lhs_.
-  if (strict_) {
+  if (strict()) {
     // This returns non-equal for some object types, or falls through if it
     // was not lucky.
-    EmitStrictTwoHeapObjectCompare(masm, lhs_, rhs_);
+    EmitStrictTwoHeapObjectCompare(masm, lhs, rhs);
   }
 
   Label check_for_symbols;
@@ -1787,8 +1806,8 @@ void CompareStub::Generate(MacroAssembler* masm) {
   // that case.  If the inputs are not doubles then jumps to check_for_symbols.
   // In this case r2 will contain the type of rhs_.  Never falls through.
   EmitCheckForTwoHeapNumbers(masm,
-                             lhs_,
-                             rhs_,
+                             lhs,
+                             rhs,
                              &both_loaded_as_doubles,
                              &check_for_symbols,
                              &flat_string_check);
@@ -1796,31 +1815,31 @@ void CompareStub::Generate(MacroAssembler* masm) {
   __ bind(&check_for_symbols);
   // In the strict case the EmitStrictTwoHeapObjectCompare already took care of
   // symbols.
-  if (cc_ == eq && !strict_) {
+  if (cc == eq && !strict()) {
     // Returns an answer for two symbols or two detectable objects.
     // Otherwise jumps to string case or not both strings case.
     // Assumes that r2 is the type of rhs_ on entry.
-    EmitCheckForSymbolsOrObjects(masm, lhs_, rhs_, &flat_string_check, &slow);
+    EmitCheckForSymbolsOrObjects(masm, lhs, rhs, &flat_string_check, &slow);
   }
 
   // Check for both being sequential ASCII strings, and inline if that is the
   // case.
   __ bind(&flat_string_check);
 
-  __ JumpIfNonSmisNotBothSequentialAsciiStrings(lhs_, rhs_, r2, r3, &slow);
+  __ JumpIfNonSmisNotBothSequentialAsciiStrings(lhs, rhs, r2, r3, &slow);
 
   __ IncrementCounter(isolate->counters()->string_compare_native(), 1, r2, r3);
-  if (cc_ == eq) {
+  if (cc == eq) {
     StringCompareStub::GenerateFlatAsciiStringEquals(masm,
-                                                     lhs_,
-                                                     rhs_,
+                                                     lhs,
+                                                     rhs,
                                                      r2,
                                                      r3,
                                                      r4);
   } else {
     StringCompareStub::GenerateCompareFlatAsciiStrings(masm,
-                                                       lhs_,
-                                                       rhs_,
+                                                       lhs,
+                                                       rhs,
                                                        r2,
                                                        r3,
                                                        r4,
@@ -1830,18 +1849,18 @@ void CompareStub::Generate(MacroAssembler* masm) {
 
   __ bind(&slow);
 
-  __ Push(lhs_, rhs_);
+  __ Push(lhs, rhs);
   // Figure out which native to call and setup the arguments.
   Builtins::JavaScript native;
-  if (cc_ == eq) {
-    native = strict_ ? Builtins::STRICT_EQUALS : Builtins::EQUALS;
+  if (cc == eq) {
+    native = strict() ? Builtins::STRICT_EQUALS : Builtins::EQUALS;
   } else {
     native = Builtins::COMPARE;
     int ncr;  // NaN compare result
-    if (cc_ == lt || cc_ == le) {
+    if (cc == lt || cc == le) {
       ncr = GREATER;
     } else {
-      ASSERT(cc_ == gt || cc_ == ge);  // remaining cases
+      ASSERT(cc == gt || cc == ge);  // remaining cases
       ncr = LESS;
     }
     __ mov(r0, Operand(Smi::FromInt(ncr)));
@@ -1851,6 +1870,9 @@ void CompareStub::Generate(MacroAssembler* masm) {
   // Call the native; it returns -1 (less), 0 (equal), or 1 (greater)
   // tagged as a small integer.
   __ InvokeBuiltin(native, JUMP_FUNCTION);
+
+  __ bind(&miss);
+  GenerateMiss(masm);
 }
 
 
@@ -2334,20 +2356,23 @@ void UnaryOpStub::GenerateGenericCodeFallback(MacroAssembler* masm) {
 }
 
 
+void BinaryOpStub::Initialize() {
+  platform_specific_bit_ = CpuFeatures::IsSupported(VFP2);
+}
+
+
 void BinaryOpStub::GenerateTypeTransition(MacroAssembler* masm) {
   Label get_result;
 
   __ Push(r1, r0);
 
   __ mov(r2, Operand(Smi::FromInt(MinorKey())));
-  __ mov(r1, Operand(Smi::FromInt(op_)));
-  __ mov(r0, Operand(Smi::FromInt(operands_type_)));
-  __ Push(r2, r1, r0);
+  __ push(r2);
 
   __ TailCallExternalReference(
       ExternalReference(IC_Utility(IC::kBinaryOp_Patch),
                         masm->isolate()),
-      5,
+      3,
       1);
 }
 
@@ -2358,59 +2383,8 @@ void BinaryOpStub::GenerateTypeTransitionWithSavedArgs(
 }
 
 
-void BinaryOpStub::Generate(MacroAssembler* masm) {
-  // Explicitly allow generation of nested stubs. It is safe here because
-  // generation code does not use any raw pointers.
-  AllowStubCallsScope allow_stub_calls(masm, true);
-
-  switch (operands_type_) {
-    case BinaryOpIC::UNINITIALIZED:
-      GenerateTypeTransition(masm);
-      break;
-    case BinaryOpIC::SMI:
-      GenerateSmiStub(masm);
-      break;
-    case BinaryOpIC::INT32:
-      GenerateInt32Stub(masm);
-      break;
-    case BinaryOpIC::HEAP_NUMBER:
-      GenerateHeapNumberStub(masm);
-      break;
-    case BinaryOpIC::ODDBALL:
-      GenerateOddballStub(masm);
-      break;
-    case BinaryOpIC::BOTH_STRING:
-      GenerateBothStringStub(masm);
-      break;
-    case BinaryOpIC::STRING:
-      GenerateStringStub(masm);
-      break;
-    case BinaryOpIC::GENERIC:
-      GenerateGeneric(masm);
-      break;
-    default:
-      UNREACHABLE();
-  }
-}
-
-
-void BinaryOpStub::PrintName(StringStream* stream) {
-  const char* op_name = Token::Name(op_);
-  const char* overwrite_name;
-  switch (mode_) {
-    case NO_OVERWRITE: overwrite_name = "Alloc"; break;
-    case OVERWRITE_RIGHT: overwrite_name = "OverwriteRight"; break;
-    case OVERWRITE_LEFT: overwrite_name = "OverwriteLeft"; break;
-    default: overwrite_name = "UnknownOverwrite"; break;
-  }
-  stream->Add("BinaryOpStub_%s_%s_%s",
-              op_name,
-              overwrite_name,
-              BinaryOpIC::GetName(operands_type_));
-}
-
-
-void BinaryOpStub::GenerateSmiSmiOperation(MacroAssembler* masm) {
+void BinaryOpStub_GenerateSmiSmiOperation(MacroAssembler* masm,
+                                          Token::Value op) {
   Register left = r1;
   Register right = r0;
   Register scratch1 = r7;
@@ -2420,7 +2394,7 @@ void BinaryOpStub::GenerateSmiSmiOperation(MacroAssembler* masm) {
   STATIC_ASSERT(kSmiTag == 0);
 
   Label not_smi_result;
-  switch (op_) {
+  switch (op) {
     case Token::ADD:
       __ add(right, left, Operand(right), SetCC);  // Add optimistically.
       __ Ret(vc);
@@ -2535,10 +2509,24 @@ void BinaryOpStub::GenerateSmiSmiOperation(MacroAssembler* masm) {
 }
 
 
-void BinaryOpStub::GenerateFPOperation(MacroAssembler* masm,
-                                       bool smi_operands,
-                                       Label* not_numbers,
-                                       Label* gc_required) {
+void BinaryOpStub_GenerateHeapResultAllocation(MacroAssembler* masm,
+                                               Register result,
+                                               Register heap_number_map,
+                                               Register scratch1,
+                                               Register scratch2,
+                                               Label* gc_required,
+                                               OverwriteMode mode);
+
+
+void BinaryOpStub_GenerateFPOperation(MacroAssembler* masm,
+                                      BinaryOpIC::TypeInfo left_type,
+                                      BinaryOpIC::TypeInfo right_type,
+                                      bool smi_operands,
+                                      Label* not_numbers,
+                                      Label* gc_required,
+                                      Label* miss,
+                                      Token::Value op,
+                                      OverwriteMode mode) {
   Register left = r1;
   Register right = r0;
   Register scratch1 = r7;
@@ -2546,15 +2534,21 @@ void BinaryOpStub::GenerateFPOperation(MacroAssembler* masm,
   Register scratch3 = r4;
 
   ASSERT(smi_operands || (not_numbers != NULL));
-  if (smi_operands && FLAG_debug_code) {
-    __ AbortIfNotSmi(left);
-    __ AbortIfNotSmi(right);
+  if (smi_operands) {
+    __ AssertSmi(left);
+    __ AssertSmi(right);
+  }
+  if (left_type == BinaryOpIC::SMI) {
+    __ JumpIfNotSmi(left, miss);
+  }
+  if (right_type == BinaryOpIC::SMI) {
+    __ JumpIfNotSmi(right, miss);
   }
 
   Register heap_number_map = r6;
   __ LoadRoot(heap_number_map, Heap::kHeapNumberMapRootIndex);
 
-  switch (op_) {
+  switch (op) {
     case Token::ADD:
     case Token::SUB:
     case Token::MUL:
@@ -2564,25 +2558,44 @@ void BinaryOpStub::GenerateFPOperation(MacroAssembler* masm,
       // depending on whether VFP3 is available or not.
       FloatingPointHelper::Destination destination =
           CpuFeatures::IsSupported(VFP2) &&
-          op_ != Token::MOD ?
+          op != Token::MOD ?
           FloatingPointHelper::kVFPRegisters :
           FloatingPointHelper::kCoreRegisters;
 
       // Allocate new heap number for result.
       Register result = r5;
-      GenerateHeapResultAllocation(
-          masm, result, heap_number_map, scratch1, scratch2, gc_required);
+      BinaryOpStub_GenerateHeapResultAllocation(
+          masm, result, heap_number_map, scratch1, scratch2, gc_required, mode);
 
       // Load the operands.
       if (smi_operands) {
         FloatingPointHelper::LoadSmis(masm, destination, scratch1, scratch2);
       } else {
-        FloatingPointHelper::LoadOperands(masm,
-                                          destination,
-                                          heap_number_map,
-                                          scratch1,
-                                          scratch2,
-                                          not_numbers);
+        // Load right operand to d7 or r2/r3.
+        if (right_type == BinaryOpIC::INT32) {
+          FloatingPointHelper::LoadNumberAsInt32Double(
+              masm, right, destination, d7, d8, r2, r3, heap_number_map,
+              scratch1, scratch2, s0, miss);
+        } else {
+          Label* fail = (right_type == BinaryOpIC::HEAP_NUMBER) ? miss
+                                                                : not_numbers;
+          FloatingPointHelper::LoadNumber(
+              masm, destination, right, d7, r2, r3, heap_number_map,
+              scratch1, scratch2, fail);
+        }
+        // Load left operand to d6 or r0/r1. This keeps r0/r1 intact if it
+        // jumps to |miss|.
+        if (left_type == BinaryOpIC::INT32) {
+          FloatingPointHelper::LoadNumberAsInt32Double(
+              masm, left, destination, d6, d8, r0, r1, heap_number_map,
+              scratch1, scratch2, s0, miss);
+        } else {
+          Label* fail = (left_type == BinaryOpIC::HEAP_NUMBER) ? miss
+                                                               : not_numbers;
+          FloatingPointHelper::LoadNumber(
+              masm, destination, left, d6, r0, r1, heap_number_map,
+              scratch1, scratch2, fail);
+        }
       }
 
       // Calculate the result.
@@ -2591,7 +2604,7 @@ void BinaryOpStub::GenerateFPOperation(MacroAssembler* masm,
         // d6: Left value
         // d7: Right value
         CpuFeatures::Scope scope(VFP2);
-        switch (op_) {
+        switch (op) {
           case Token::ADD:
             __ vadd(d5, d6, d7);
             break;
@@ -2615,7 +2628,7 @@ void BinaryOpStub::GenerateFPOperation(MacroAssembler* masm,
       } else {
         // Call the C function to handle the double operation.
         FloatingPointHelper::CallCCodeForDoubleOperation(masm,
-                                                         op_,
+                                                         op,
                                                          result,
                                                          scratch1);
         if (FLAG_debug_code) {
@@ -2656,7 +2669,7 @@ void BinaryOpStub::GenerateFPOperation(MacroAssembler* masm,
       }
 
       Label result_not_a_smi;
-      switch (op_) {
+      switch (op) {
         case Token::BIT_OR:
           __ orr(r2, r3, Operand(r2));
           break;
@@ -2707,8 +2720,9 @@ void BinaryOpStub::GenerateFPOperation(MacroAssembler* masm,
         __ AllocateHeapNumber(
             result, scratch1, scratch2, heap_number_map, gc_required);
       } else {
-        GenerateHeapResultAllocation(
-            masm, result, heap_number_map, scratch1, scratch2, gc_required);
+        BinaryOpStub_GenerateHeapResultAllocation(
+            masm, result, heap_number_map, scratch1, scratch2, gc_required,
+            mode);
       }
 
       // r2: Answer as signed int32.
@@ -2723,7 +2737,7 @@ void BinaryOpStub::GenerateFPOperation(MacroAssembler* masm,
         // mentioned above SHR needs to always produce a positive result.
         CpuFeatures::Scope scope(VFP2);
         __ vmov(s0, r2);
-        if (op_ == Token::SHR) {
+        if (op == Token::SHR) {
           __ vcvt_f64_u32(d0, s0);
         } else {
           __ vcvt_f64_s32(d0, s0);
@@ -2748,12 +2762,14 @@ void BinaryOpStub::GenerateFPOperation(MacroAssembler* masm,
 // Generate the smi code. If the operation on smis are successful this return is
 // generated. If the result is not a smi and heap number allocation is not
 // requested the code falls through. If number allocation is requested but a
-// heap number cannot be allocated the code jumps to the lable gc_required.
-void BinaryOpStub::GenerateSmiCode(
+// heap number cannot be allocated the code jumps to the label gc_required.
+void BinaryOpStub_GenerateSmiCode(
     MacroAssembler* masm,
     Label* use_runtime,
     Label* gc_required,
-    SmiCodeGenerateHeapNumberResults allow_heapnumber_results) {
+    Token::Value op,
+    BinaryOpStub::SmiCodeGenerateHeapNumberResults allow_heapnumber_results,
+    OverwriteMode mode) {
   Label not_smis;
 
   Register left = r1;
@@ -2766,12 +2782,14 @@ void BinaryOpStub::GenerateSmiCode(
   __ JumpIfNotSmi(scratch1, &not_smis);
 
   // If the smi-smi operation results in a smi return is generated.
-  GenerateSmiSmiOperation(masm);
+  BinaryOpStub_GenerateSmiSmiOperation(masm, op);
 
   // If heap number results are possible generate the result in an allocated
   // heap number.
-  if (allow_heapnumber_results == ALLOW_HEAPNUMBER_RESULTS) {
-    GenerateFPOperation(masm, true, use_runtime, gc_required);
+  if (allow_heapnumber_results == BinaryOpStub::ALLOW_HEAPNUMBER_RESULTS) {
+    BinaryOpStub_GenerateFPOperation(
+        masm, BinaryOpIC::UNINITIALIZED, BinaryOpIC::UNINITIALIZED, true,
+        use_runtime, gc_required, &not_smis, op, mode);
   }
   __ bind(&not_smis);
 }
@@ -2783,14 +2801,14 @@ void BinaryOpStub::GenerateSmiStub(MacroAssembler* masm) {
   if (result_type_ == BinaryOpIC::UNINITIALIZED ||
       result_type_ == BinaryOpIC::SMI) {
     // Only allow smi results.
-    GenerateSmiCode(masm, &call_runtime, NULL, NO_HEAPNUMBER_RESULTS);
+    BinaryOpStub_GenerateSmiCode(
+        masm, &call_runtime, NULL, op_, NO_HEAPNUMBER_RESULTS, mode_);
   } else {
     // Allow heap number result and don't make a transition if a heap number
     // cannot be allocated.
-    GenerateSmiCode(masm,
-                    &call_runtime,
-                    &call_runtime,
-                    ALLOW_HEAPNUMBER_RESULTS);
+    BinaryOpStub_GenerateSmiCode(
+        masm, &call_runtime, &call_runtime, op_, ALLOW_HEAPNUMBER_RESULTS,
+        mode_);
   }
 
   // Code falls through if the result is not returned as either a smi or heap
@@ -2798,23 +2816,14 @@ void BinaryOpStub::GenerateSmiStub(MacroAssembler* masm) {
   GenerateTypeTransition(masm);
 
   __ bind(&call_runtime);
+  GenerateRegisterArgsPush(masm);
   GenerateCallRuntime(masm);
 }
 
 
-void BinaryOpStub::GenerateStringStub(MacroAssembler* masm) {
-  ASSERT(operands_type_ == BinaryOpIC::STRING);
-  ASSERT(op_ == Token::ADD);
-  // Try to add arguments as strings, otherwise, transition to the generic
-  // BinaryOpIC type.
-  GenerateAddStrings(masm);
-  GenerateTypeTransition(masm);
-}
-
-
 void BinaryOpStub::GenerateBothStringStub(MacroAssembler* masm) {
   Label call_runtime;
-  ASSERT(operands_type_ == BinaryOpIC::BOTH_STRING);
+  ASSERT(left_type_ == BinaryOpIC::STRING && right_type_ == BinaryOpIC::STRING);
   ASSERT(op_ == Token::ADD);
   // If both arguments are strings, call the string add stub.
   // Otherwise, do a transition.
@@ -2843,14 +2852,13 @@ void BinaryOpStub::GenerateBothStringStub(MacroAssembler* masm) {
 
 
 void BinaryOpStub::GenerateInt32Stub(MacroAssembler* masm) {
-  ASSERT(operands_type_ == BinaryOpIC::INT32);
+  ASSERT(Max(left_type_, right_type_) == BinaryOpIC::INT32);
 
   Register left = r1;
   Register right = r0;
   Register scratch1 = r7;
   Register scratch2 = r9;
   DwVfpRegister double_scratch = d0;
-  SwVfpRegister single_scratch = s3;
 
   Register heap_number_result = no_reg;
   Register heap_number_map = r6;
@@ -2866,7 +2874,7 @@ void BinaryOpStub::GenerateInt32Stub(MacroAssembler* masm) {
   Label skip;
   __ orr(scratch1, left, right);
   __ JumpIfNotSmi(scratch1, &skip);
-  GenerateSmiSmiOperation(masm);
+  BinaryOpStub_GenerateSmiSmiOperation(masm, op_);
   // Fall through if the result is not a smi.
   __ bind(&skip);
 
@@ -2876,6 +2884,15 @@ void BinaryOpStub::GenerateInt32Stub(MacroAssembler* masm) {
     case Token::MUL:
     case Token::DIV:
     case Token::MOD: {
+      // It could be that only SMIs have been seen at either the left
+      // or the right operand. For precise type feedback, patch the IC
+      // again if this changes.
+      if (left_type_ == BinaryOpIC::SMI) {
+        __ JumpIfNotSmi(left, &transition);
+      }
+      if (right_type_ == BinaryOpIC::SMI) {
+        __ JumpIfNotSmi(right, &transition);
+      }
       // Load both operands and check that they are 32-bit integer.
       // Jump to type transition if they are not. The registers r0 and r1 (right
       // and left) are preserved for the runtime call.
@@ -2888,6 +2905,7 @@ void BinaryOpStub::GenerateInt32Stub(MacroAssembler* masm) {
                                                    right,
                                                    destination,
                                                    d7,
+                                                   d8,
                                                    r2,
                                                    r3,
                                                    heap_number_map,
@@ -2899,6 +2917,7 @@ void BinaryOpStub::GenerateInt32Stub(MacroAssembler* masm) {
                                                    left,
                                                    destination,
                                                    d6,
+                                                   d8,
                                                    r4,
                                                    r5,
                                                    heap_number_map,
@@ -2934,10 +2953,10 @@ void BinaryOpStub::GenerateInt32Stub(MacroAssembler* masm) {
           // transition.
 
           __ EmitVFPTruncate(kRoundToZero,
-                             single_scratch,
-                             d5,
                              scratch1,
-                             scratch2);
+                             d5,
+                             scratch2,
+                             d8);
 
           if (result_type_ <= BinaryOpIC::INT32) {
             // If the ne condition is set, result does
@@ -2946,7 +2965,6 @@ void BinaryOpStub::GenerateInt32Stub(MacroAssembler* masm) {
           }
 
           // Check if the result fits in a smi.
-          __ vmov(scratch1, single_scratch);
           __ add(scratch2, scratch1, Operand(0x40000000), SetCC);
           // If not try to return a heap number.
           __ b(mi, &return_heap_number);
@@ -2973,12 +2991,13 @@ void BinaryOpStub::GenerateInt32Stub(MacroAssembler* masm) {
                                                  : BinaryOpIC::INT32)) {
           // We are using vfp registers so r5 is available.
           heap_number_result = r5;
-          GenerateHeapResultAllocation(masm,
-                                       heap_number_result,
-                                       heap_number_map,
-                                       scratch1,
-                                       scratch2,
-                                       &call_runtime);
+          BinaryOpStub_GenerateHeapResultAllocation(masm,
+                                                    heap_number_result,
+                                                    heap_number_map,
+                                                    scratch1,
+                                                    scratch2,
+                                                    &call_runtime,
+                                                    mode_);
           __ sub(r0, heap_number_result, Operand(kHeapObjectTag));
           __ vstr(d5, r0, HeapNumber::kValueOffset);
           __ mov(r0, heap_number_result);
@@ -2997,12 +3016,13 @@ void BinaryOpStub::GenerateInt32Stub(MacroAssembler* masm) {
 
         // Allocate a heap number to store the result.
         heap_number_result = r5;
-        GenerateHeapResultAllocation(masm,
-                                     heap_number_result,
-                                     heap_number_map,
-                                     scratch1,
-                                     scratch2,
-                                     &pop_and_call_runtime);
+        BinaryOpStub_GenerateHeapResultAllocation(masm,
+                                                  heap_number_result,
+                                                  heap_number_map,
+                                                  scratch1,
+                                                  scratch2,
+                                                  &pop_and_call_runtime,
+                                                  mode_);
 
         // Load the left value from the value saved on the stack.
         __ Pop(r1, r0);
@@ -3041,6 +3061,7 @@ void BinaryOpStub::GenerateInt32Stub(MacroAssembler* masm) {
                                              scratch2,
                                              scratch3,
                                              d0,
+                                             d1,
                                              &transition);
       FloatingPointHelper::LoadNumberAsInt32(masm,
                                              right,
@@ -3050,6 +3071,7 @@ void BinaryOpStub::GenerateInt32Stub(MacroAssembler* masm) {
                                              scratch2,
                                              scratch3,
                                              d0,
+                                             d1,
                                              &transition);
 
       // The ECMA-262 standard specifies that, for shift operations, only the
@@ -3105,12 +3127,13 @@ void BinaryOpStub::GenerateInt32Stub(MacroAssembler* masm) {
 
       __ bind(&return_heap_number);
       heap_number_result = r5;
-      GenerateHeapResultAllocation(masm,
-                                   heap_number_result,
-                                   heap_number_map,
-                                   scratch1,
-                                   scratch2,
-                                   &call_runtime);
+      BinaryOpStub_GenerateHeapResultAllocation(masm,
+                                                heap_number_result,
+                                                heap_number_map,
+                                                scratch1,
+                                                scratch2,
+                                                &call_runtime,
+                                                mode_);
 
       if (CpuFeatures::IsSupported(VFP2)) {
         CpuFeatures::Scope scope(VFP2);
@@ -3154,6 +3177,7 @@ void BinaryOpStub::GenerateInt32Stub(MacroAssembler* masm) {
   }
 
   __ bind(&call_runtime);
+  GenerateRegisterArgsPush(masm);
   GenerateCallRuntime(masm);
 }
 
@@ -3192,20 +3216,32 @@ void BinaryOpStub::GenerateOddballStub(MacroAssembler* masm) {
 
 
 void BinaryOpStub::GenerateHeapNumberStub(MacroAssembler* masm) {
-  Label call_runtime;
-  GenerateFPOperation(masm, false, &call_runtime, &call_runtime);
+  Label call_runtime, transition;
+  BinaryOpStub_GenerateFPOperation(
+      masm, left_type_, right_type_, false,
+      &transition, &call_runtime, &transition, op_, mode_);
+
+  __ bind(&transition);
+  GenerateTypeTransition(masm);
 
   __ bind(&call_runtime);
+  GenerateRegisterArgsPush(masm);
   GenerateCallRuntime(masm);
 }
 
 
 void BinaryOpStub::GenerateGeneric(MacroAssembler* masm) {
-  Label call_runtime, call_string_add_or_runtime;
+  Label call_runtime, call_string_add_or_runtime, transition;
 
-  GenerateSmiCode(masm, &call_runtime, &call_runtime, ALLOW_HEAPNUMBER_RESULTS);
+  BinaryOpStub_GenerateSmiCode(
+      masm, &call_runtime, &call_runtime, op_, ALLOW_HEAPNUMBER_RESULTS, mode_);
 
-  GenerateFPOperation(masm, false, &call_string_add_or_runtime, &call_runtime);
+  BinaryOpStub_GenerateFPOperation(
+      masm, left_type_, right_type_, false,
+      &call_string_add_or_runtime, &call_runtime, &transition, op_, mode_);
+
+  __ bind(&transition);
+  GenerateTypeTransition(masm);
 
   __ bind(&call_string_add_or_runtime);
   if (op_ == Token::ADD) {
@@ -3213,6 +3249,7 @@ void BinaryOpStub::GenerateGeneric(MacroAssembler* masm) {
   }
 
   __ bind(&call_runtime);
+  GenerateRegisterArgsPush(masm);
   GenerateCallRuntime(masm);
 }
 
@@ -3248,61 +3285,20 @@ void BinaryOpStub::GenerateAddStrings(MacroAssembler* masm) {
 }
 
 
-void BinaryOpStub::GenerateCallRuntime(MacroAssembler* masm) {
-  GenerateRegisterArgsPush(masm);
-  switch (op_) {
-    case Token::ADD:
-      __ InvokeBuiltin(Builtins::ADD, JUMP_FUNCTION);
-      break;
-    case Token::SUB:
-      __ InvokeBuiltin(Builtins::SUB, JUMP_FUNCTION);
-      break;
-    case Token::MUL:
-      __ InvokeBuiltin(Builtins::MUL, JUMP_FUNCTION);
-      break;
-    case Token::DIV:
-      __ InvokeBuiltin(Builtins::DIV, JUMP_FUNCTION);
-      break;
-    case Token::MOD:
-      __ InvokeBuiltin(Builtins::MOD, JUMP_FUNCTION);
-      break;
-    case Token::BIT_OR:
-      __ InvokeBuiltin(Builtins::BIT_OR, JUMP_FUNCTION);
-      break;
-    case Token::BIT_AND:
-      __ InvokeBuiltin(Builtins::BIT_AND, JUMP_FUNCTION);
-      break;
-    case Token::BIT_XOR:
-      __ InvokeBuiltin(Builtins::BIT_XOR, JUMP_FUNCTION);
-      break;
-    case Token::SAR:
-      __ InvokeBuiltin(Builtins::SAR, JUMP_FUNCTION);
-      break;
-    case Token::SHR:
-      __ InvokeBuiltin(Builtins::SHR, JUMP_FUNCTION);
-      break;
-    case Token::SHL:
-      __ InvokeBuiltin(Builtins::SHL, JUMP_FUNCTION);
-      break;
-    default:
-      UNREACHABLE();
-  }
-}
-
-
-void BinaryOpStub::GenerateHeapResultAllocation(MacroAssembler* masm,
-                                                Register result,
-                                                Register heap_number_map,
-                                                Register scratch1,
-                                                Register scratch2,
-                                                Label* gc_required) {
+void BinaryOpStub_GenerateHeapResultAllocation(MacroAssembler* masm,
+                                               Register result,
+                                               Register heap_number_map,
+                                               Register scratch1,
+                                               Register scratch2,
+                                               Label* gc_required,
+                                               OverwriteMode mode) {
   // Code below will scratch result if allocation fails. To keep both arguments
   // intact for the runtime call result cannot be one of these.
   ASSERT(!result.is(r0) && !result.is(r1));
 
-  if (mode_ == OVERWRITE_LEFT || mode_ == OVERWRITE_RIGHT) {
+  if (mode == OVERWRITE_LEFT || mode == OVERWRITE_RIGHT) {
     Label skip_allocation, allocated;
-    Register overwritable_operand = mode_ == OVERWRITE_LEFT ? r1 : r0;
+    Register overwritable_operand = mode == OVERWRITE_LEFT ? r1 : r0;
     // If the overwritable operand is already an object, we skip the
     // allocation of a heap number.
     __ JumpIfNotSmi(overwritable_operand, &skip_allocation);
@@ -3315,7 +3311,7 @@ void BinaryOpStub::GenerateHeapResultAllocation(MacroAssembler* masm,
     __ mov(result, Operand(overwritable_operand));
     __ bind(&allocated);
   } else {
-    ASSERT(mode_ == NO_OVERWRITE);
+    ASSERT(mode == NO_OVERWRITE);
     __ AllocateHeapNumber(
         result, scratch1, scratch2, heap_number_map, gc_required);
   }
@@ -3444,8 +3440,8 @@ void TranscendentalCacheStub::Generate(MacroAssembler* masm) {
         ExternalReference(RuntimeFunction(), masm->isolate());
     __ TailCallExternalReference(runtime_function, 1, 1);
   } else {
-    ASSERT(CpuFeatures::IsSupported(VFP3));
-    CpuFeatures::Scope scope(VFP3);
+    ASSERT(CpuFeatures::IsSupported(VFP2));
+    CpuFeatures::Scope scope(VFP2);
 
     Label no_update;
     Label skip_cache;
@@ -3636,13 +3632,13 @@ void MathPowStub::Generate(MacroAssembler* masm) {
       Label not_plus_half;
 
       // Test for 0.5.
-      __ vmov(double_scratch, 0.5);
+      __ vmov(double_scratch, 0.5, scratch);
       __ VFPCompareAndSetFlags(double_exponent, double_scratch);
       __ b(ne, &not_plus_half);
 
       // Calculates square root of base.  Check for the special case of
       // Math.pow(-Infinity, 0.5) == Infinity (ECMA spec, 15.8.2.13).
-      __ vmov(double_scratch, -V8_INFINITY);
+      __ vmov(double_scratch, -V8_INFINITY, scratch);
       __ VFPCompareAndSetFlags(double_base, double_scratch);
       __ vneg(double_result, double_scratch, eq);
       __ b(eq, &done);
@@ -3653,20 +3649,20 @@ void MathPowStub::Generate(MacroAssembler* masm) {
       __ jmp(&done);
 
       __ bind(&not_plus_half);
-      __ vmov(double_scratch, -0.5);
+      __ vmov(double_scratch, -0.5, scratch);
       __ VFPCompareAndSetFlags(double_exponent, double_scratch);
       __ b(ne, &call_runtime);
 
       // Calculates square root of base.  Check for the special case of
       // Math.pow(-Infinity, -0.5) == 0 (ECMA spec, 15.8.2.13).
-      __ vmov(double_scratch, -V8_INFINITY);
+      __ vmov(double_scratch, -V8_INFINITY, scratch);
       __ VFPCompareAndSetFlags(double_base, double_scratch);
       __ vmov(double_result, kDoubleRegZero, eq);
       __ b(eq, &done);
 
       // Add +0 to convert -0 to +0.
       __ vadd(double_scratch, double_base, kDoubleRegZero);
-      __ vmov(double_result, 1.0);
+      __ vmov(double_result, 1.0, scratch);
       __ vsqrt(double_scratch, double_scratch);
       __ vdiv(double_result, double_result, double_scratch);
       __ jmp(&done);
@@ -3701,7 +3697,7 @@ void MathPowStub::Generate(MacroAssembler* masm) {
     __ mov(exponent, scratch);
   }
   __ vmov(double_scratch, double_base);  // Back up base.
-  __ vmov(double_result, 1.0);
+  __ vmov(double_result, 1.0, scratch2);
 
   // Get absolute value of exponent.
   __ cmp(scratch, Operand(0));
@@ -3717,7 +3713,7 @@ void MathPowStub::Generate(MacroAssembler* masm) {
 
   __ cmp(exponent, Operand(0));
   __ b(ge, &done);
-  __ vmov(double_scratch, 1.0);
+  __ vmov(double_scratch, 1.0, scratch);
   __ vdiv(double_result, double_scratch, double_result);
   // Test whether result is zero.  Bail out to check for subnormal result.
   // Due to subnormals, x^-y == (1/x)^y does not hold in all cases.
@@ -4930,7 +4926,7 @@ void RegExpExecStub::Generate(MacroAssembler* masm) {
   // subject: Subject string
   // regexp_data: RegExp data (FixedArray)
   // r0: Instance type of subject string
-  STATIC_ASSERT(4 == kAsciiStringTag);
+  STATIC_ASSERT(4 == kOneByteStringTag);
   STATIC_ASSERT(kTwoByteStringTag == 0);
   // Find the code object based on the assumptions above.
   __ and_(r0, r0, Operand(kStringEncodingMask));
@@ -5154,7 +5150,7 @@ void RegExpExecStub::Generate(MacroAssembler* masm) {
   __ ldr(subject,
          FieldMemOperand(subject, ExternalString::kResourceDataOffset));
   // Move the pointer so that offset-wise, it looks like a sequential string.
-  STATIC_ASSERT(SeqTwoByteString::kHeaderSize == SeqAsciiString::kHeaderSize);
+  STATIC_ASSERT(SeqTwoByteString::kHeaderSize == SeqOneByteString::kHeaderSize);
   __ sub(subject,
          subject,
          Operand(SeqTwoByteString::kHeaderSize - kHeapObjectTag));
@@ -5232,12 +5228,12 @@ void RegExpConstructResultStub::Generate(MacroAssembler* masm) {
   // Set FixedArray length.
   __ mov(r6, Operand(r5, LSL, kSmiTagSize));
   __ str(r6, FieldMemOperand(r3, FixedArray::kLengthOffset));
-  // Fill contents of fixed-array with the-hole.
-  __ mov(r2, Operand(factory->the_hole_value()));
+  // Fill contents of fixed-array with undefined.
+  __ LoadRoot(r2, Heap::kUndefinedValueRootIndex);
   __ add(r3, r3, Operand(FixedArray::kHeaderSize - kHeapObjectTag));
-  // Fill fixed array elements with hole.
+  // Fill fixed array elements with undefined.
   // r0: JSArray, tagged.
-  // r2: the hole.
+  // r2: undefined.
   // r3: Start of elements in FixedArray.
   // r5: Number of elements to fill.
   Label loop;
@@ -5432,48 +5428,6 @@ void CallConstructStub::Generate(MacroAssembler* masm) {
 }
 
 
-// Unfortunately you have to run without snapshots to see most of these
-// names in the profile since most compare stubs end up in the snapshot.
-void CompareStub::PrintName(StringStream* stream) {
-  ASSERT((lhs_.is(r0) && rhs_.is(r1)) ||
-         (lhs_.is(r1) && rhs_.is(r0)));
-  const char* cc_name;
-  switch (cc_) {
-    case lt: cc_name = "LT"; break;
-    case gt: cc_name = "GT"; break;
-    case le: cc_name = "LE"; break;
-    case ge: cc_name = "GE"; break;
-    case eq: cc_name = "EQ"; break;
-    case ne: cc_name = "NE"; break;
-    default: cc_name = "UnknownCondition"; break;
-  }
-  bool is_equality = cc_ == eq || cc_ == ne;
-  stream->Add("CompareStub_%s", cc_name);
-  stream->Add(lhs_.is(r0) ? "_r0" : "_r1");
-  stream->Add(rhs_.is(r0) ? "_r0" : "_r1");
-  if (strict_ && is_equality) stream->Add("_STRICT");
-  if (never_nan_nan_ && is_equality) stream->Add("_NO_NAN");
-  if (!include_number_compare_) stream->Add("_NO_NUMBER");
-  if (!include_smi_compare_) stream->Add("_NO_SMI");
-}
-
-
-int CompareStub::MinorKey() {
-  // Encode the three parameters in a unique 16 bit value. To avoid duplicate
-  // stubs the never NaN NaN condition is only taken into account if the
-  // condition is equals.
-  ASSERT((static_cast<unsigned>(cc_) >> 28) < (1 << 12));
-  ASSERT((lhs_.is(r0) && rhs_.is(r1)) ||
-         (lhs_.is(r1) && rhs_.is(r0)));
-  return ConditionField::encode(static_cast<unsigned>(cc_) >> 28)
-         | RegisterField::encode(lhs_.is(r0))
-         | StrictField::encode(strict_)
-         | NeverNanNanField::encode(cc_ == eq ? never_nan_nan_ : false)
-         | IncludeNumberCompareField::encode(include_number_compare_)
-         | IncludeSmiCompareField::encode(include_smi_compare_);
-}
-
-
 // StringCharCodeAtGenerator
 void StringCharCodeAtGenerator::GenerateFast(MacroAssembler* masm) {
   Label flat_string;
@@ -5923,7 +5877,7 @@ void StringHelper::GenerateTwoCharacterSymbolTableProbe(MacroAssembler* masm,
 
     // Check if the two characters match.
     // Assumes that word load is little endian.
-    __ ldrh(scratch, FieldMemOperand(candidate, SeqAsciiString::kHeaderSize));
+    __ ldrh(scratch, FieldMemOperand(candidate, SeqOneByteString::kHeaderSize));
     __ cmp(chars, scratch);
     __ b(eq, &found_in_symbol_table);
     __ bind(&next_probe[i]);
@@ -6006,23 +5960,28 @@ void SubStringStub::Generate(MacroAssembler* masm) {
   STATIC_ASSERT(kSmiTag == 0);
   STATIC_ASSERT(kSmiTagSize + kSmiShiftSize == 1);
 
-  // I.e., arithmetic shift right by one un-smi-tags.
-  __ mov(r2, Operand(r2, ASR, 1), SetCC);
-  __ mov(r3, Operand(r3, ASR, 1), SetCC, cc);
-  // If either to or from had the smi tag bit set, then carry is set now.
-  __ b(cs, &runtime);  // Either "from" or "to" is not a smi.
+  // Arithmetic shift right by one un-smi-tags. In this case we rotate right
+  // instead because we bail out on non-smi values: ROR and ASR are equivalent
+  // for smis but they set the flags in a way that's easier to optimize.
+  __ mov(r2, Operand(r2, ROR, 1), SetCC);
+  __ mov(r3, Operand(r3, ROR, 1), SetCC, cc);
+  // If either to or from had the smi tag bit set, then C is set now, and N
+  // has the same value: we rotated by 1, so the bottom bit is now the top bit.
   // We want to bailout to runtime here if From is negative.  In that case, the
   // next instruction is not executed and we fall through to bailing out to
-  // runtime.  pl is the opposite of mi.
-  // Both r2 and r3 are untagged integers.
-  __ sub(r2, r2, Operand(r3), SetCC, pl);
-  __ b(mi, &runtime);  // Fail if from > to.
+  // runtime.
+  // Executed if both r2 and r3 are untagged integers.
+  __ sub(r2, r2, Operand(r3), SetCC, cc);
+  // One of the above un-smis or the above SUB could have set N==1.
+  __ b(mi, &runtime);  // Either "from" or "to" is not an smi, or from > to.
 
   // Make sure first argument is a string.
   __ ldr(r0, MemOperand(sp, kStringOffset));
   STATIC_ASSERT(kSmiTag == 0);
-  __ JumpIfSmi(r0, &runtime);
-  Condition is_string = masm->IsObjectStringType(r0, r1);
+  // Do a JumpIfSmi, but fold its jump into the subsequent string test.
+  __ tst(r0, Operand(kSmiTagMask));
+  Condition is_string = masm->IsObjectStringType(r0, r1, ne);
+  ASSERT(is_string == eq);
   __ b(NegateCondition(is_string), &runtime);
 
   // Short-cut for the case of trivial substring.
@@ -6093,7 +6052,7 @@ void SubStringStub::Generate(MacroAssembler* masm) {
     // string's encoding is wrong because we always have to recheck encoding of
     // the newly created string's parent anyways due to externalized strings.
     Label two_byte_slice, set_slice_header;
-    STATIC_ASSERT((kStringEncodingMask & kAsciiStringTag) != 0);
+    STATIC_ASSERT((kStringEncodingMask & kOneByteStringTag) != 0);
     STATIC_ASSERT((kStringEncodingMask & kTwoByteStringTag) == 0);
     __ tst(r1, Operand(kStringEncodingMask));
     __ b(eq, &two_byte_slice);
@@ -6131,12 +6090,12 @@ void SubStringStub::Generate(MacroAssembler* masm) {
 
   __ bind(&sequential_string);
   // Locate first character of underlying subject string.
-  STATIC_ASSERT(SeqTwoByteString::kHeaderSize == SeqAsciiString::kHeaderSize);
-  __ add(r5, r5, Operand(SeqAsciiString::kHeaderSize - kHeapObjectTag));
+  STATIC_ASSERT(SeqTwoByteString::kHeaderSize == SeqOneByteString::kHeaderSize);
+  __ add(r5, r5, Operand(SeqOneByteString::kHeaderSize - kHeapObjectTag));
 
   __ bind(&allocate_result);
   // Sequential acii string.  Allocate the result.
-  STATIC_ASSERT((kAsciiStringTag & kStringEncodingMask) != 0);
+  STATIC_ASSERT((kOneByteStringTag & kStringEncodingMask) != 0);
   __ tst(r1, Operand(kStringEncodingMask));
   __ b(eq, &two_byte_sequential);
 
@@ -6146,13 +6105,13 @@ void SubStringStub::Generate(MacroAssembler* masm) {
   // Locate first character of substring to copy.
   __ add(r5, r5, r3);
   // Locate first character of result.
-  __ add(r1, r0, Operand(SeqAsciiString::kHeaderSize - kHeapObjectTag));
+  __ add(r1, r0, Operand(SeqOneByteString::kHeaderSize - kHeapObjectTag));
 
   // r0: result string
   // r1: first character of result string
   // r2: result string length
   // r5: first character of substring to copy
-  STATIC_ASSERT((SeqAsciiString::kHeaderSize & kObjectAlignmentMask) == 0);
+  STATIC_ASSERT((SeqOneByteString::kHeaderSize & kObjectAlignmentMask) == 0);
   StringHelper::GenerateCopyCharactersLong(masm, r1, r5, r2, r3, r4, r6, r7, r9,
                                            COPY_ASCII | DEST_ALWAYS_ALIGNED);
   __ jmp(&return_r0);
@@ -6277,7 +6236,7 @@ void StringCompareStub::GenerateAsciiCharsCompareLoop(
   // doesn't need an additional compare.
   __ SmiUntag(length);
   __ add(scratch1, length,
-         Operand(SeqAsciiString::kHeaderSize - kHeapObjectTag));
+         Operand(SeqOneByteString::kHeaderSize - kHeapObjectTag));
   __ add(left, left, Operand(scratch1));
   __ add(right, right, Operand(scratch1));
   __ rsb(length, length, Operand::Zero());
@@ -6430,8 +6389,8 @@ void StringAddStub::Generate(MacroAssembler* masm) {
                                                   &call_runtime);
 
   // Get the two characters forming the sub string.
-  __ ldrb(r2, FieldMemOperand(r0, SeqAsciiString::kHeaderSize));
-  __ ldrb(r3, FieldMemOperand(r1, SeqAsciiString::kHeaderSize));
+  __ ldrb(r2, FieldMemOperand(r0, SeqOneByteString::kHeaderSize));
+  __ ldrb(r3, FieldMemOperand(r1, SeqOneByteString::kHeaderSize));
 
   // Try to lookup two character string in symbol table. If it is not found
   // just allocate a new one.
@@ -6450,7 +6409,7 @@ void StringAddStub::Generate(MacroAssembler* masm) {
   // in a little endian mode)
   __ mov(r6, Operand(2));
   __ AllocateAsciiString(r0, r6, r4, r5, r9, &call_runtime);
-  __ strh(r2, FieldMemOperand(r0, SeqAsciiString::kHeaderSize));
+  __ strh(r2, FieldMemOperand(r0, SeqOneByteString::kHeaderSize));
   __ IncrementCounter(counters->string_add_native(), 1, r2, r3);
   __ add(sp, sp, Operand(2 * kPointerSize));
   __ Ret();
@@ -6500,11 +6459,6 @@ void StringAddStub::Generate(MacroAssembler* masm) {
   __ tst(r4, Operand(kAsciiDataHintMask));
   __ tst(r5, Operand(kAsciiDataHintMask), ne);
   __ b(ne, &ascii_data);
-  __ eor(r4, r4, Operand(r5));
-  STATIC_ASSERT(kAsciiStringTag != 0 && kAsciiDataHintTag != 0);
-  __ and_(r4, r4, Operand(kAsciiStringTag | kAsciiDataHintTag));
-  __ cmp(r4, Operand(kAsciiStringTag | kAsciiDataHintTag));
-  __ b(eq, &ascii_data);
 
   // Allocate a two byte cons string.
   __ AllocateTwoByteConsString(r7, r6, r4, r5, &call_runtime);
@@ -6537,10 +6491,10 @@ void StringAddStub::Generate(MacroAssembler* masm) {
 
   STATIC_ASSERT(kSeqStringTag == 0);
   __ tst(r4, Operand(kStringRepresentationMask));
-  STATIC_ASSERT(SeqAsciiString::kHeaderSize == SeqTwoByteString::kHeaderSize);
+  STATIC_ASSERT(SeqOneByteString::kHeaderSize == SeqTwoByteString::kHeaderSize);
   __ add(r7,
          r0,
-         Operand(SeqAsciiString::kHeaderSize - kHeapObjectTag),
+         Operand(SeqOneByteString::kHeaderSize - kHeapObjectTag),
          LeaveCC,
          eq);
   __ b(eq, &first_prepared);
@@ -6553,10 +6507,10 @@ void StringAddStub::Generate(MacroAssembler* masm) {
 
   STATIC_ASSERT(kSeqStringTag == 0);
   __ tst(r5, Operand(kStringRepresentationMask));
-  STATIC_ASSERT(SeqAsciiString::kHeaderSize == SeqTwoByteString::kHeaderSize);
+  STATIC_ASSERT(SeqOneByteString::kHeaderSize == SeqTwoByteString::kHeaderSize);
   __ add(r1,
          r1,
-         Operand(SeqAsciiString::kHeaderSize - kHeapObjectTag),
+         Operand(SeqOneByteString::kHeaderSize - kHeapObjectTag),
          LeaveCC,
          eq);
   __ b(eq, &second_prepared);
@@ -6579,7 +6533,7 @@ void StringAddStub::Generate(MacroAssembler* masm) {
   __ b(eq, &non_ascii_string_add_flat_result);
 
   __ AllocateAsciiString(r0, r6, r4, r5, r9, &call_runtime);
-  __ add(r6, r0, Operand(SeqAsciiString::kHeaderSize - kHeapObjectTag));
+  __ add(r6, r0, Operand(SeqOneByteString::kHeaderSize - kHeapObjectTag));
   // r0: result string.
   // r7: first character of first string.
   // r1: first character of second string.
@@ -6670,7 +6624,7 @@ void StringAddStub::GenerateConvertArgument(MacroAssembler* masm,
 
 
 void ICCompareStub::GenerateSmis(MacroAssembler* masm) {
-  ASSERT(state_ == CompareIC::SMIS);
+  ASSERT(state_ == CompareIC::SMI);
   Label miss;
   __ orr(r2, r1, r0);
   __ JumpIfNotSmi(r2, &miss);
@@ -6691,31 +6645,53 @@ void ICCompareStub::GenerateSmis(MacroAssembler* masm) {
 
 
 void ICCompareStub::GenerateHeapNumbers(MacroAssembler* masm) {
-  ASSERT(state_ == CompareIC::HEAP_NUMBERS);
+  ASSERT(state_ == CompareIC::HEAP_NUMBER);
 
   Label generic_stub;
   Label unordered, maybe_undefined1, maybe_undefined2;
   Label miss;
-  __ and_(r2, r1, Operand(r0));
-  __ JumpIfSmi(r2, &generic_stub);
 
-  __ CompareObjectType(r0, r2, r2, HEAP_NUMBER_TYPE);
-  __ b(ne, &maybe_undefined1);
-  __ CompareObjectType(r1, r2, r2, HEAP_NUMBER_TYPE);
-  __ b(ne, &maybe_undefined2);
+  if (left_ == CompareIC::SMI) {
+    __ JumpIfNotSmi(r1, &miss);
+  }
+  if (right_ == CompareIC::SMI) {
+    __ JumpIfNotSmi(r0, &miss);
+  }
 
   // Inlining the double comparison and falling back to the general compare
-  // stub if NaN is involved or VFP3 is unsupported.
+  // stub if NaN is involved or VFP2 is unsupported.
   if (CpuFeatures::IsSupported(VFP2)) {
     CpuFeatures::Scope scope(VFP2);
 
-    // Load left and right operand
-    __ sub(r2, r1, Operand(kHeapObjectTag));
-    __ vldr(d0, r2, HeapNumber::kValueOffset);
+    // Load left and right operand.
+    Label done, left, left_smi, right_smi;
+    __ JumpIfSmi(r0, &right_smi);
+    __ CheckMap(r0, r2, Heap::kHeapNumberMapRootIndex, &maybe_undefined1,
+                DONT_DO_SMI_CHECK);
     __ sub(r2, r0, Operand(kHeapObjectTag));
     __ vldr(d1, r2, HeapNumber::kValueOffset);
+    __ b(&left);
+    __ bind(&right_smi);
+    __ SmiUntag(r2, r0);  // Can't clobber r0 yet.
+    SwVfpRegister single_scratch = d2.low();
+    __ vmov(single_scratch, r2);
+    __ vcvt_f64_s32(d1, single_scratch);
+
+    __ bind(&left);
+    __ JumpIfSmi(r1, &left_smi);
+    __ CheckMap(r1, r2, Heap::kHeapNumberMapRootIndex, &maybe_undefined2,
+                DONT_DO_SMI_CHECK);
+    __ sub(r2, r1, Operand(kHeapObjectTag));
+    __ vldr(d0, r2, HeapNumber::kValueOffset);
+    __ b(&done);
+    __ bind(&left_smi);
+    __ SmiUntag(r2, r1);  // Can't clobber r1 yet.
+    single_scratch = d3.low();
+    __ vmov(single_scratch, r2);
+    __ vcvt_f64_s32(d0, single_scratch);
 
-    // Compare operands
+    __ bind(&done);
+    // Compare operands.
     __ VFPCompareAndSetFlags(d0, d1);
 
     // Don't base result on status bits when a NaN is involved.
@@ -6729,14 +6705,16 @@ void ICCompareStub::GenerateHeapNumbers(MacroAssembler* masm) {
   }
 
   __ bind(&unordered);
-  CompareStub stub(GetCondition(), strict(), NO_COMPARE_FLAGS, r1, r0);
   __ bind(&generic_stub);
+  ICCompareStub stub(op_, CompareIC::GENERIC, CompareIC::GENERIC,
+                     CompareIC::GENERIC);
   __ Jump(stub.GetCode(), RelocInfo::CODE_TARGET);
 
   __ bind(&maybe_undefined1);
   if (Token::IsOrderedRelationalCompareOp(op_)) {
     __ CompareRoot(r0, Heap::kUndefinedValueRootIndex);
     __ b(ne, &miss);
+    __ JumpIfSmi(r1, &unordered);
     __ CompareObjectType(r1, r2, r2, HEAP_NUMBER_TYPE);
     __ b(ne, &maybe_undefined2);
     __ jmp(&unordered);
@@ -6754,7 +6732,7 @@ void ICCompareStub::GenerateHeapNumbers(MacroAssembler* masm) {
 
 
 void ICCompareStub::GenerateSymbols(MacroAssembler* masm) {
-  ASSERT(state_ == CompareIC::SYMBOLS);
+  ASSERT(state_ == CompareIC::SYMBOL);
   Label miss;
 
   // Registers containing left and right operands respectively.
@@ -6792,7 +6770,7 @@ void ICCompareStub::GenerateSymbols(MacroAssembler* masm) {
 
 
 void ICCompareStub::GenerateStrings(MacroAssembler* masm) {
-  ASSERT(state_ == CompareIC::STRINGS);
+  ASSERT(state_ == CompareIC::STRING);
   Label miss;
 
   bool equality = Token::IsEqualityOp(op_);
@@ -6870,7 +6848,7 @@ void ICCompareStub::GenerateStrings(MacroAssembler* masm) {
 
 
 void ICCompareStub::GenerateObjects(MacroAssembler* masm) {
-  ASSERT(state_ == CompareIC::OBJECTS);
+  ASSERT(state_ == CompareIC::OBJECT);
   Label miss;
   __ and_(r2, r1, Operand(r0));
   __ JumpIfSmi(r2, &miss);
@@ -7064,8 +7042,7 @@ void StringDictionaryLookupStub::GeneratePositiveLookup(MacroAssembler* masm,
   ASSERT(!name.is(scratch1));
   ASSERT(!name.is(scratch2));
 
-  // Assert that name contains a string.
-  if (FLAG_debug_code) __ AbortIfNotString(name);
+  __ AssertString(name);
 
   // Compute the capacity mask.
   __ ldr(scratch1, FieldMemOperand(elements, kCapacityOffset));
@@ -7262,6 +7239,7 @@ static const AheadOfTimeWriteBarrierStubList kAheadOfTime[] = {
 
 #undef REG
 
+
 bool RecordWriteStub::IsPregenerated() {
   for (const AheadOfTimeWriteBarrierStubList* entry = kAheadOfTime;
        !entry->object.is(no_reg);
@@ -7303,6 +7281,11 @@ void RecordWriteStub::GenerateFixedRegStubsAheadOfTime() {
 }
 
 
+bool CodeStub::CanUseFPRegisters() {
+  return CpuFeatures::IsSupported(VFP2);
+}
+
+
 // Takes the input in 3 registers: address_ value_ and object_.  A pointer to
 // the value has just been written into the object, now this stub makes sure
 // we keep the GC informed.  The word in the object where the value has been
@@ -7398,12 +7381,7 @@ void RecordWriteStub::InformIncrementalMarker(MacroAssembler* masm, Mode mode) {
   ASSERT(!address.is(r0));
   __ Move(address, regs_.address());
   __ Move(r0, regs_.object());
-  if (mode == INCREMENTAL_COMPACTION) {
-    __ Move(r1, address);
-  } else {
-    ASSERT(mode == INCREMENTAL);
-    __ ldr(r1, MemOperand(address, 0));
-  }
+  __ Move(r1, address);
   __ mov(r2, Operand(ExternalReference::isolate_address()));
 
   AllowExternalCallThatCantCauseGC scope(masm);
@@ -7431,6 +7409,16 @@ void RecordWriteStub::CheckNeedsToInformIncrementalMarker(
   Label need_incremental;
   Label need_incremental_pop_scratch;
 
+  __ and_(regs_.scratch0(), regs_.object(), Operand(~Page::kPageAlignmentMask));
+  __ ldr(regs_.scratch1(),
+         MemOperand(regs_.scratch0(),
+                    MemoryChunk::kWriteBarrierCounterOffset));
+  __ sub(regs_.scratch1(), regs_.scratch1(), Operand(1), SetCC);
+  __ str(regs_.scratch1(),
+         MemOperand(regs_.scratch0(),
+                    MemoryChunk::kWriteBarrierCounterOffset));
+  __ b(mi, &need_incremental);
+
   // Let's look at the color of the object:  If it is not black we don't have
   // to inform the incremental marker.
   __ JumpIfBlack(regs_.object(), regs_.scratch0(), regs_.scratch1(), &on_black);
@@ -7551,7 +7539,9 @@ void StoreArrayLiteralElementStub::Generate(MacroAssembler* masm) {
   // Array literal has ElementsKind of FAST_DOUBLE_ELEMENTS.
   __ bind(&double_elements);
   __ ldr(r5, FieldMemOperand(r1, JSObject::kElementsOffset));
-  __ StoreNumberToDoubleElements(r0, r3, r1, r5, r6, r7, r9, r2,
+  __ StoreNumberToDoubleElements(r0, r3,
+                                 // Overwrites all regs after this.
+                                 r5, r6, r7, r9, r2,
                                  &slow_elements);
   __ Ret();
 }
@@ -7559,6 +7549,7 @@ void StoreArrayLiteralElementStub::Generate(MacroAssembler* masm) {
 
 void ProfileEntryHookStub::MaybeCallEntryHook(MacroAssembler* masm) {
   if (entry_hook_ != NULL) {
+    PredictableCodeSizeScope predictable(masm, 4 * Assembler::kInstrSize);
     ProfileEntryHookStub stub;
     __ push(lr);
     __ CallStub(&stub);
@@ -7570,7 +7561,7 @@ void ProfileEntryHookStub::MaybeCallEntryHook(MacroAssembler* masm) {
 void ProfileEntryHookStub::Generate(MacroAssembler* masm) {
   // The entry hook is a "push lr" instruction, followed by a call.
   const int32_t kReturnAddressDistanceFromFunctionStart =
-      Assembler::kCallTargetAddressOffset + Assembler::kInstrSize;
+      3 * Assembler::kInstrSize;
 
   // Save live volatile registers.
   __ Push(lr, r5, r1);
diff --git a/deps/v8/src/arm/code-stubs-arm.h b/deps/v8/src/arm/code-stubs-arm.h
index 3ddc405715..0443cf799c 100644
--- a/deps/v8/src/arm/code-stubs-arm.h
+++ b/deps/v8/src/arm/code-stubs-arm.h
@@ -142,108 +142,6 @@ class UnaryOpStub: public CodeStub {
 };
 
 
-class BinaryOpStub: public CodeStub {
- public:
-  BinaryOpStub(Token::Value op, OverwriteMode mode)
-      : op_(op),
-        mode_(mode),
-        operands_type_(BinaryOpIC::UNINITIALIZED),
-        result_type_(BinaryOpIC::UNINITIALIZED) {
-    use_vfp2_ = CpuFeatures::IsSupported(VFP2);
-    ASSERT(OpBits::is_valid(Token::NUM_TOKENS));
-  }
-
-  BinaryOpStub(
-      int key,
-      BinaryOpIC::TypeInfo operands_type,
-      BinaryOpIC::TypeInfo result_type = BinaryOpIC::UNINITIALIZED)
-      : op_(OpBits::decode(key)),
-        mode_(ModeBits::decode(key)),
-        use_vfp2_(VFP2Bits::decode(key)),
-        operands_type_(operands_type),
-        result_type_(result_type) { }
-
- private:
-  enum SmiCodeGenerateHeapNumberResults {
-    ALLOW_HEAPNUMBER_RESULTS,
-    NO_HEAPNUMBER_RESULTS
-  };
-
-  Token::Value op_;
-  OverwriteMode mode_;
-  bool use_vfp2_;
-
-  // Operand type information determined at runtime.
-  BinaryOpIC::TypeInfo operands_type_;
-  BinaryOpIC::TypeInfo result_type_;
-
-  virtual void PrintName(StringStream* stream);
-
-  // Minor key encoding in 16 bits RRRTTTVOOOOOOOMM.
-  class ModeBits: public BitField<OverwriteMode, 0, 2> {};
-  class OpBits: public BitField<Token::Value, 2, 7> {};
-  class VFP2Bits: public BitField<bool, 9, 1> {};
-  class OperandTypeInfoBits: public BitField<BinaryOpIC::TypeInfo, 10, 3> {};
-  class ResultTypeInfoBits: public BitField<BinaryOpIC::TypeInfo, 13, 3> {};
-
-  Major MajorKey() { return BinaryOp; }
-  int MinorKey() {
-    return OpBits::encode(op_)
-           | ModeBits::encode(mode_)
-           | VFP2Bits::encode(use_vfp2_)
-           | OperandTypeInfoBits::encode(operands_type_)
-           | ResultTypeInfoBits::encode(result_type_);
-  }
-
-  void Generate(MacroAssembler* masm);
-  void GenerateGeneric(MacroAssembler* masm);
-  void GenerateSmiSmiOperation(MacroAssembler* masm);
-  void GenerateFPOperation(MacroAssembler* masm,
-                           bool smi_operands,
-                           Label* not_numbers,
-                           Label* gc_required);
-  void GenerateSmiCode(MacroAssembler* masm,
-                       Label* use_runtime,
-                       Label* gc_required,
-                       SmiCodeGenerateHeapNumberResults heapnumber_results);
-  void GenerateLoadArguments(MacroAssembler* masm);
-  void GenerateReturn(MacroAssembler* masm);
-  void GenerateUninitializedStub(MacroAssembler* masm);
-  void GenerateSmiStub(MacroAssembler* masm);
-  void GenerateInt32Stub(MacroAssembler* masm);
-  void GenerateHeapNumberStub(MacroAssembler* masm);
-  void GenerateOddballStub(MacroAssembler* masm);
-  void GenerateStringStub(MacroAssembler* masm);
-  void GenerateBothStringStub(MacroAssembler* masm);
-  void GenerateGenericStub(MacroAssembler* masm);
-  void GenerateAddStrings(MacroAssembler* masm);
-  void GenerateCallRuntime(MacroAssembler* masm);
-
-  void GenerateHeapResultAllocation(MacroAssembler* masm,
-                                    Register result,
-                                    Register heap_number_map,
-                                    Register scratch1,
-                                    Register scratch2,
-                                    Label* gc_required);
-  void GenerateRegisterArgsPush(MacroAssembler* masm);
-  void GenerateTypeTransition(MacroAssembler* masm);
-  void GenerateTypeTransitionWithSavedArgs(MacroAssembler* masm);
-
-  virtual int GetCodeKind() { return Code::BINARY_OP_IC; }
-
-  virtual InlineCacheState GetICState() {
-    return BinaryOpIC::ToState(operands_type_);
-  }
-
-  virtual void FinishCode(Handle<Code> code) {
-    code->set_binary_op_type(operands_type_);
-    code->set_binary_op_result_type(result_type_);
-  }
-
-  friend class CodeGenerator;
-};
-
-
 class StringHelper : public AllStatic {
  public:
   // Generate code for copying characters using a simple loop. This should only
@@ -724,20 +622,6 @@ class FloatingPointHelper : public AllStatic {
                        Register scratch1,
                        Register scratch2);
 
-  // Loads objects from r0 and r1 (right and left in binary operations) into
-  // floating point registers. Depending on the destination the values ends up
-  // either d7 and d6 or in r2/r3 and r0/r1 respectively. If the destination is
-  // floating point registers VFP3 must be supported. If core registers are
-  // requested when VFP3 is supported d6 and d7 will still be scratched. If
-  // either r0 or r1 is not a number (not smi and not heap number object) the
-  // not_number label is jumped to with r0 and r1 intact.
-  static void LoadOperands(MacroAssembler* masm,
-                           FloatingPointHelper::Destination destination,
-                           Register heap_number_map,
-                           Register scratch1,
-                           Register scratch2,
-                           Label* not_number);
-
   // Convert the smi or heap number in object to an int32 using the rules
   // for ToInt32 as described in ECMAScript 9.5.: the value is truncated
   // and brought into the range -2^31 .. +2^31 - 1.
@@ -773,6 +657,7 @@ class FloatingPointHelper : public AllStatic {
                                       Register object,
                                       Destination destination,
                                       DwVfpRegister double_dst,
+                                      DwVfpRegister double_scratch,
                                       Register dst1,
                                       Register dst2,
                                       Register heap_number_map,
@@ -794,7 +679,8 @@ class FloatingPointHelper : public AllStatic {
                                 Register scratch1,
                                 Register scratch2,
                                 Register scratch3,
-                                DwVfpRegister double_scratch,
+                                DwVfpRegister double_scratch0,
+                                DwVfpRegister double_scratch1,
                                 Label* not_int32);
 
   // Generate non VFP3 code to check if a double can be exactly represented by a
@@ -834,7 +720,12 @@ class FloatingPointHelper : public AllStatic {
                                           Register heap_number_result,
                                           Register scratch);
 
- private:
+  // Loads the objects from |object| into floating point registers.
+  // Depending on |destination| the value ends up either in |dst| or
+  // in |dst1|/|dst2|. If |destination| is kVFPRegisters, then VFP3
+  // must be supported. If kCoreRegisters are requested and VFP3 is
+  // supported, |dst| will be scratched. If |object| is neither smi nor
+  // heap number, |not_number| is jumped to with |object| still intact.
   static void LoadNumber(MacroAssembler* masm,
                          FloatingPointHelper::Destination destination,
                          Register object,
diff --git a/deps/v8/src/arm/codegen-arm.cc b/deps/v8/src/arm/codegen-arm.cc
index 09166c3c01..bb771b18e2 100644
--- a/deps/v8/src/arm/codegen-arm.cc
+++ b/deps/v8/src/arm/codegen-arm.cc
@@ -31,11 +31,11 @@
 
 #include "codegen.h"
 #include "macro-assembler.h"
+#include "simulator-arm.h"
 
 namespace v8 {
 namespace internal {
 
-#define __ ACCESS_MASM(masm)
 
 UnaryMathFunction CreateTranscendentalFunction(TranscendentalCache::Type type) {
   switch (type) {
@@ -49,6 +49,74 @@ UnaryMathFunction CreateTranscendentalFunction(TranscendentalCache::Type type) {
 }
 
 
+#define __ masm.
+
+
+#if defined(USE_SIMULATOR)
+byte* fast_exp_arm_machine_code = NULL;
+double fast_exp_simulator(double x) {
+  return Simulator::current(Isolate::Current())->CallFP(
+      fast_exp_arm_machine_code, x, 0);
+}
+#endif
+
+
+UnaryMathFunction CreateExpFunction() {
+  if (!CpuFeatures::IsSupported(VFP2)) return &exp;
+  if (!FLAG_fast_math) return &exp;
+  size_t actual_size;
+  byte* buffer = static_cast<byte*>(OS::Allocate(1 * KB, &actual_size, true));
+  if (buffer == NULL) return &exp;
+  ExternalReference::InitializeMathExpData();
+
+  MacroAssembler masm(NULL, buffer, static_cast<int>(actual_size));
+
+  {
+    CpuFeatures::Scope use_vfp(VFP2);
+    DoubleRegister input = d0;
+    DoubleRegister result = d1;
+    DoubleRegister double_scratch1 = d2;
+    DoubleRegister double_scratch2 = d3;
+    Register temp1 = r4;
+    Register temp2 = r5;
+    Register temp3 = r6;
+
+    if (masm.use_eabi_hardfloat()) {
+      // Input value is in d0 anyway, nothing to do.
+    } else {
+      __ vmov(input, r0, r1);
+    }
+    __ Push(temp3, temp2, temp1);
+    MathExpGenerator::EmitMathExp(
+        &masm, input, result, double_scratch1, double_scratch2,
+        temp1, temp2, temp3);
+    __ Pop(temp3, temp2, temp1);
+    if (masm.use_eabi_hardfloat()) {
+      __ vmov(d0, result);
+    } else {
+      __ vmov(r0, r1, result);
+    }
+    __ Ret();
+  }
+
+  CodeDesc desc;
+  masm.GetCode(&desc);
+
+  CPU::FlushICache(buffer, actual_size);
+  OS::ProtectCode(buffer, actual_size);
+
+#if !defined(USE_SIMULATOR)
+  return FUNCTION_CAST<UnaryMathFunction>(buffer);
+#else
+  fast_exp_arm_machine_code = buffer;
+  return &fast_exp_simulator;
+#endif
+}
+
+
+#undef __
+
+
 UnaryMathFunction CreateSqrtFunction() {
   return &sqrt;
 }
@@ -73,6 +141,8 @@ void StubRuntimeCallHelper::AfterCall(MacroAssembler* masm) const {
 // -------------------------------------------------------------------------
 // Code generators
 
+#define __ ACCESS_MASM(masm)
+
 void ElementsTransitionGenerator::GenerateMapChangeElementsTransition(
     MacroAssembler* masm) {
   // ----------- S t a t e -------------
@@ -192,7 +262,7 @@ void ElementsTransitionGenerator::GenerateSmiToDouble(
                       HeapObject::kMapOffset,
                       r3,
                       r9,
-                      kLRHasBeenSaved,
+                      kLRHasNotBeenSaved,
                       kDontSaveFPRegs,
                       OMIT_REMEMBERED_SET,
                       OMIT_SMI_CHECK);
@@ -416,7 +486,7 @@ void StringCharLoadGenerator::Generate(MacroAssembler* masm,
   __ b(ne, &external_string);
 
   // Prepare sequential strings
-  STATIC_ASSERT(SeqTwoByteString::kHeaderSize == SeqAsciiString::kHeaderSize);
+  STATIC_ASSERT(SeqTwoByteString::kHeaderSize == SeqOneByteString::kHeaderSize);
   __ add(string,
          string,
          Operand(SeqTwoByteString::kHeaderSize - kHeapObjectTag));
@@ -450,8 +520,188 @@ void StringCharLoadGenerator::Generate(MacroAssembler* masm,
   __ bind(&done);
 }
 
+
+void SeqStringSetCharGenerator::Generate(MacroAssembler* masm,
+                                         String::Encoding encoding,
+                                         Register string,
+                                         Register index,
+                                         Register value) {
+  if (FLAG_debug_code) {
+    __ tst(index, Operand(kSmiTagMask));
+    __ Check(eq, "Non-smi index");
+    __ tst(value, Operand(kSmiTagMask));
+    __ Check(eq, "Non-smi value");
+
+    __ ldr(ip, FieldMemOperand(string, String::kLengthOffset));
+    __ cmp(index, ip);
+    __ Check(lt, "Index is too large");
+
+    __ cmp(index, Operand(Smi::FromInt(0)));
+    __ Check(ge, "Index is negative");
+
+    __ ldr(ip, FieldMemOperand(string, HeapObject::kMapOffset));
+    __ ldrb(ip, FieldMemOperand(ip, Map::kInstanceTypeOffset));
+
+    __ and_(ip, ip, Operand(kStringRepresentationMask | kStringEncodingMask));
+    static const uint32_t one_byte_seq_type = kSeqStringTag | kOneByteStringTag;
+    static const uint32_t two_byte_seq_type = kSeqStringTag | kTwoByteStringTag;
+    __ cmp(ip, Operand(encoding == String::ONE_BYTE_ENCODING
+                           ? one_byte_seq_type : two_byte_seq_type));
+    __ Check(eq, "Unexpected string type");
+  }
+
+  __ add(ip,
+         string,
+         Operand(SeqString::kHeaderSize - kHeapObjectTag));
+  __ SmiUntag(value, value);
+  STATIC_ASSERT(kSmiTagSize == 1 && kSmiTag == 0);
+  if (encoding == String::ONE_BYTE_ENCODING) {
+    // Smis are tagged by left shift by 1, thus LSR by 1 to smi-untag inline.
+    __ strb(value, MemOperand(ip, index, LSR, 1));
+  } else {
+    // No need to untag a smi for two-byte addressing.
+    __ strh(value, MemOperand(ip, index));
+  }
+}
+
+
+static MemOperand ExpConstant(int index, Register base) {
+  return MemOperand(base, index * kDoubleSize);
+}
+
+
+void MathExpGenerator::EmitMathExp(MacroAssembler* masm,
+                                   DoubleRegister input,
+                                   DoubleRegister result,
+                                   DoubleRegister double_scratch1,
+                                   DoubleRegister double_scratch2,
+                                   Register temp1,
+                                   Register temp2,
+                                   Register temp3) {
+  ASSERT(!input.is(result));
+  ASSERT(!input.is(double_scratch1));
+  ASSERT(!input.is(double_scratch2));
+  ASSERT(!result.is(double_scratch1));
+  ASSERT(!result.is(double_scratch2));
+  ASSERT(!double_scratch1.is(double_scratch2));
+  ASSERT(!temp1.is(temp2));
+  ASSERT(!temp1.is(temp3));
+  ASSERT(!temp2.is(temp3));
+  ASSERT(ExternalReference::math_exp_constants(0).address() != NULL);
+
+  Label done;
+
+  __ mov(temp3, Operand(ExternalReference::math_exp_constants(0)));
+
+  __ vldr(double_scratch1, ExpConstant(0, temp3));
+  __ vmov(result, kDoubleRegZero);
+  __ VFPCompareAndSetFlags(double_scratch1, input);
+  __ b(ge, &done);
+  __ vldr(double_scratch2, ExpConstant(1, temp3));
+  __ VFPCompareAndSetFlags(input, double_scratch2);
+  __ vldr(result, ExpConstant(2, temp3));
+  __ b(ge, &done);
+  __ vldr(double_scratch1, ExpConstant(3, temp3));
+  __ vldr(result, ExpConstant(4, temp3));
+  __ vmul(double_scratch1, double_scratch1, input);
+  __ vadd(double_scratch1, double_scratch1, result);
+  __ vmov(temp2, temp1, double_scratch1);
+  __ vsub(double_scratch1, double_scratch1, result);
+  __ vldr(result, ExpConstant(6, temp3));
+  __ vldr(double_scratch2, ExpConstant(5, temp3));
+  __ vmul(double_scratch1, double_scratch1, double_scratch2);
+  __ vsub(double_scratch1, double_scratch1, input);
+  __ vsub(result, result, double_scratch1);
+  __ vmul(input, double_scratch1, double_scratch1);
+  __ vmul(result, result, input);
+  __ mov(temp1, Operand(temp2, LSR, 11));
+  __ vldr(double_scratch2, ExpConstant(7, temp3));
+  __ vmul(result, result, double_scratch2);
+  __ vsub(result, result, double_scratch1);
+  __ vldr(double_scratch2, ExpConstant(8, temp3));
+  __ vadd(result, result, double_scratch2);
+  __ movw(ip, 0x7ff);
+  __ and_(temp2, temp2, Operand(ip));
+  __ add(temp1, temp1, Operand(0x3ff));
+  __ mov(temp1, Operand(temp1, LSL, 20));
+
+  // Must not call ExpConstant() after overwriting temp3!
+  __ mov(temp3, Operand(ExternalReference::math_exp_log_table()));
+  __ ldr(ip, MemOperand(temp3, temp2, LSL, 3));
+  __ add(temp3, temp3, Operand(kPointerSize));
+  __ ldr(temp2, MemOperand(temp3, temp2, LSL, 3));
+  __ orr(temp1, temp1, temp2);
+  __ vmov(input, ip, temp1);
+  __ vmul(result, result, input);
+  __ bind(&done);
+}
+
 #undef __
 
+// add(r0, pc, Operand(-8))
+static const uint32_t kCodeAgePatchFirstInstruction = 0xe24f0008;
+
+static byte* GetNoCodeAgeSequence(uint32_t* length) {
+  // The sequence of instructions that is patched out for aging code is the
+  // following boilerplate stack-building prologue that is found in FUNCTIONS
+  static bool initialized = false;
+  static uint32_t sequence[kNoCodeAgeSequenceLength];
+  byte* byte_sequence = reinterpret_cast<byte*>(sequence);
+  *length = kNoCodeAgeSequenceLength * Assembler::kInstrSize;
+  if (!initialized) {
+    CodePatcher patcher(byte_sequence, kNoCodeAgeSequenceLength);
+    PredictableCodeSizeScope scope(patcher.masm(), *length);
+    patcher.masm()->stm(db_w, sp, r1.bit() | cp.bit() | fp.bit() | lr.bit());
+    patcher.masm()->LoadRoot(ip, Heap::kUndefinedValueRootIndex);
+    patcher.masm()->add(fp, sp, Operand(2 * kPointerSize));
+    initialized = true;
+  }
+  return byte_sequence;
+}
+
+
+bool Code::IsYoungSequence(byte* sequence) {
+  uint32_t young_length;
+  byte* young_sequence = GetNoCodeAgeSequence(&young_length);
+  bool result = !memcmp(sequence, young_sequence, young_length);
+  ASSERT(result ||
+         Memory::uint32_at(sequence) == kCodeAgePatchFirstInstruction);
+  return result;
+}
+
+
+void Code::GetCodeAgeAndParity(byte* sequence, Age* age,
+                               MarkingParity* parity) {
+  if (IsYoungSequence(sequence)) {
+    *age = kNoAge;
+    *parity = NO_MARKING_PARITY;
+  } else {
+    Address target_address = Memory::Address_at(
+        sequence + Assembler::kInstrSize * (kNoCodeAgeSequenceLength - 1));
+    Code* stub = GetCodeFromTargetAddress(target_address);
+    GetCodeAgeAndParity(stub, age, parity);
+  }
+}
+
+
+void Code::PatchPlatformCodeAge(byte* sequence,
+                                Code::Age age,
+                                MarkingParity parity) {
+  uint32_t young_length;
+  byte* young_sequence = GetNoCodeAgeSequence(&young_length);
+  if (age == kNoAge) {
+    memcpy(sequence, young_sequence, young_length);
+    CPU::FlushICache(sequence, young_length);
+  } else {
+    Code* stub = GetCodeAgeStub(age, parity);
+    CodePatcher patcher(sequence, young_length / Assembler::kInstrSize);
+    patcher.masm()->add(r0, pc, Operand(-8));
+    patcher.masm()->ldr(pc, MemOperand(pc, -4));
+    patcher.masm()->dd(reinterpret_cast<uint32_t>(stub->instruction_start()));
+  }
+}
+
+
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_ARM
diff --git a/deps/v8/src/arm/codegen-arm.h b/deps/v8/src/arm/codegen-arm.h
index c340e6b108..8f0033e2ce 100644
--- a/deps/v8/src/arm/codegen-arm.h
+++ b/deps/v8/src/arm/codegen-arm.h
@@ -88,6 +88,22 @@ class StringCharLoadGenerator : public AllStatic {
   DISALLOW_COPY_AND_ASSIGN(StringCharLoadGenerator);
 };
 
+
+class MathExpGenerator : public AllStatic {
+ public:
+  static void EmitMathExp(MacroAssembler* masm,
+                          DoubleRegister input,
+                          DoubleRegister result,
+                          DoubleRegister double_scratch1,
+                          DoubleRegister double_scratch2,
+                          Register temp1,
+                          Register temp2,
+                          Register temp3);
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(MathExpGenerator);
+};
+
 } }  // namespace v8::internal
 
 #endif  // V8_ARM_CODEGEN_ARM_H_
diff --git a/deps/v8/src/arm/constants-arm.h b/deps/v8/src/arm/constants-arm.h
index 5aadc3caeb..a569383f24 100644
--- a/deps/v8/src/arm/constants-arm.h
+++ b/deps/v8/src/arm/constants-arm.h
@@ -75,10 +75,6 @@
 
 #endif
 
-#if CAN_USE_UNALIGNED_ACCESSES
-#define V8_TARGET_CAN_READ_UNALIGNED 1
-#endif
-
 // Using blx may yield better code, so use it when required or when available
 #if defined(USE_THUMB_INTERWORK) || defined(CAN_USE_ARMV5_INSTRUCTIONS)
 #define USE_BLX 1
@@ -88,9 +84,18 @@ namespace v8 {
 namespace internal {
 
 // Constant pool marker.
-const int kConstantPoolMarkerMask = 0xffe00000;
-const int kConstantPoolMarker = 0x0c000000;
-const int kConstantPoolLengthMask = 0x001ffff;
+// Use UDF, the permanently undefined instruction.
+const int kConstantPoolMarkerMask = 0xfff000f0;
+const int kConstantPoolMarker = 0xe7f000f0;
+const int kConstantPoolLengthMaxMask = 0xffff;
+inline int EncodeConstantPoolLength(int length) {
+  ASSERT((length & kConstantPoolLengthMaxMask) == length);
+  return ((length & 0xfff0) << 4) | (length & 0xf);
+}
+inline int DecodeConstantPoolLength(int instr) {
+  ASSERT((instr & kConstantPoolMarkerMask) == kConstantPoolMarker);
+  return ((instr >> 4) & 0xfff0) | (instr & 0xf);
+}
 
 // Number of registers in normal ARM mode.
 const int kNumRegisters = 16;
@@ -691,6 +696,9 @@ class Instruction {
                                            && (Bit(20) == 0)
                                            && ((Bit(7) == 0)); }
 
+  // Test for a nop instruction, which falls under type 1.
+  inline bool IsNopType1() const { return Bits(24, 0) == 0x0120F000; }
+
   // Test for a stop instruction.
   inline bool IsStop() const {
     return (TypeValue() == 7) && (Bit(24) == 1) && (SvcValue() >= kStopCode);
diff --git a/deps/v8/src/arm/debug-arm.cc b/deps/v8/src/arm/debug-arm.cc
index 3e7a1e9d0e..c2941be06d 100644
--- a/deps/v8/src/arm/debug-arm.cc
+++ b/deps/v8/src/arm/debug-arm.cc
@@ -48,7 +48,7 @@ void BreakLocationIterator::SetDebugBreakAtReturn() {
   //   add sp, sp, #4
   //   bx lr
   // to a call to the debug break return code.
-  // #if USE_BLX
+  // #ifdef USE_BLX
   //   ldr ip, [pc, #0]
   //   blx ip
   // #else
@@ -99,7 +99,7 @@ void BreakLocationIterator::SetDebugBreakAtSlot() {
   //   mov r2, r2
   //   mov r2, r2
   // to a call to the debug break slot code.
-  // #if USE_BLX
+  // #ifdef USE_BLX
   //   ldr ip, [pc, #0]
   //   blx ip
   // #else
diff --git a/deps/v8/src/arm/deoptimizer-arm.cc b/deps/v8/src/arm/deoptimizer-arm.cc
index 5339be1d84..ee2a581a57 100644
--- a/deps/v8/src/arm/deoptimizer-arm.cc
+++ b/deps/v8/src/arm/deoptimizer-arm.cc
@@ -104,19 +104,7 @@ void Deoptimizer::DeoptimizeFunction(JSFunction* function) {
   // ignore all slots that might have been recorded on it.
   isolate->heap()->mark_compact_collector()->InvalidateCode(code);
 
-  // Iterate over all the functions which share the same code object
-  // and make them use unoptimized version.
-  Context* context = function->context()->native_context();
-  Object* element = context->get(Context::OPTIMIZED_FUNCTIONS_LIST);
-  SharedFunctionInfo* shared = function->shared();
-  while (!element->IsUndefined()) {
-    JSFunction* func = JSFunction::cast(element);
-    // Grab element before code replacement as ReplaceCode alters the list.
-    element = func->next_function_link();
-    if (func->code() == code) {
-      func->ReplaceCode(shared->code());
-    }
-  }
+  ReplaceCodeForRelatedFunctions(function, code);
 
   if (FLAG_trace_deopt) {
     PrintF("[forced deoptimization: ");
@@ -126,7 +114,6 @@ void Deoptimizer::DeoptimizeFunction(JSFunction* function) {
 }
 
 
-static const int32_t kBranchBeforeStackCheck = 0x2a000001;
 static const int32_t kBranchBeforeInterrupt =  0x5a000004;
 
 
@@ -135,24 +122,21 @@ void Deoptimizer::PatchStackCheckCodeAt(Code* unoptimized_code,
                                         Code* check_code,
                                         Code* replacement_code) {
   const int kInstrSize = Assembler::kInstrSize;
-  // The call of the stack guard check has the following form:
-  //  e1 5d 00 0c       cmp sp, <limit>
-  //  2a 00 00 01       bcs ok
+  // The back edge bookkeeping code matches the pattern:
+  //
+  //  <decrement profiling counter>
+  //  2a 00 00 01       bpl ok
   //  e5 9f c? ??       ldr ip, [pc, <stack guard address>]
   //  e1 2f ff 3c       blx ip
   ASSERT(Memory::int32_at(pc_after - kInstrSize) == kBlxIp);
   ASSERT(Assembler::IsLdrPcImmediateOffset(
       Assembler::instr_at(pc_after - 2 * kInstrSize)));
-  if (FLAG_count_based_interrupts) {
-    ASSERT_EQ(kBranchBeforeInterrupt,
-              Memory::int32_at(pc_after - 3 * kInstrSize));
-  } else {
-    ASSERT_EQ(kBranchBeforeStackCheck,
-              Memory::int32_at(pc_after - 3 * kInstrSize));
-  }
+  ASSERT_EQ(kBranchBeforeInterrupt,
+            Memory::int32_at(pc_after - 3 * kInstrSize));
 
   // We patch the code to the following form:
-  //  e1 5d 00 0c       cmp sp, <limit>
+  //
+  //  <decrement profiling counter>
   //  e1 a0 00 00       mov r0, r0 (NOP)
   //  e5 9f c? ??       ldr ip, [pc, <on-stack replacement address>]
   //  e1 2f ff 3c       blx ip
@@ -189,15 +173,9 @@ void Deoptimizer::RevertStackCheckCodeAt(Code* unoptimized_code,
 
   // Replace NOP with conditional jump.
   CodePatcher patcher(pc_after - 3 * kInstrSize, 1);
-  if (FLAG_count_based_interrupts) {
-    patcher.masm()->b(+16, pl);
-    ASSERT_EQ(kBranchBeforeInterrupt,
-              Memory::int32_at(pc_after - 3 * kInstrSize));
-  } else {
-    patcher.masm()->b(+4, cs);
-    ASSERT_EQ(kBranchBeforeStackCheck,
-              Memory::int32_at(pc_after - 3 * kInstrSize));
-  }
+  patcher.masm()->b(+16, pl);
+  ASSERT_EQ(kBranchBeforeInterrupt,
+            Memory::int32_at(pc_after - 3 * kInstrSize));
 
   // Replace the stack check address in the constant pool
   // with the entry address of the replacement code.
diff --git a/deps/v8/src/arm/disasm-arm.cc b/deps/v8/src/arm/disasm-arm.cc
index 96a7d3ce6b..cb0a6cb5c7 100644
--- a/deps/v8/src/arm/disasm-arm.cc
+++ b/deps/v8/src/arm/disasm-arm.cc
@@ -692,11 +692,19 @@ void Decoder::DecodeType01(Instruction* instr) {
             // Rn field to encode it.
             Format(instr, "mul'cond's 'rn, 'rm, 'rs");
           } else {
-            // The MLA instruction description (A 4.1.28) refers to the order
-            // of registers as "Rd, Rm, Rs, Rn". But confusingly it uses the
-            // Rn field to encode the Rd register and the Rd field to encode
-            // the Rn register.
-            Format(instr, "mla'cond's 'rn, 'rm, 'rs, 'rd");
+            if (instr->Bit(22) == 0) {
+              // The MLA instruction description (A 4.1.28) refers to the order
+              // of registers as "Rd, Rm, Rs, Rn". But confusingly it uses the
+              // Rn field to encode the Rd register and the Rd field to encode
+              // the Rn register.
+              Format(instr, "mla'cond's 'rn, 'rm, 'rs, 'rd");
+            } else {
+              // The MLS instruction description (A 4.1.29) refers to the order
+              // of registers as "Rd, Rm, Rs, Rn". But confusingly it uses the
+              // Rn field to encode the Rd register and the Rd field to encode
+              // the Rn register.
+              Format(instr, "mls'cond's 'rn, 'rm, 'rs, 'rd");
+            }
           }
         } else {
           // The signed/long multiply instructions use the terms RdHi and RdLo
@@ -822,6 +830,8 @@ void Decoder::DecodeType01(Instruction* instr) {
     } else {
       Unknown(instr);  // not used by V8
     }
+  } else if ((type == 1) && instr->IsNopType1()) {
+    Format(instr, "nop'cond");
   } else {
     switch (instr->OpcodeField()) {
       case AND: {
@@ -974,6 +984,17 @@ void Decoder::DecodeType3(Instruction* instr) {
       break;
     }
     case db_x: {
+      if (FLAG_enable_sudiv) {
+        if (!instr->HasW()) {
+          if (instr->Bits(5, 4) == 0x1) {
+            if ((instr->Bit(22) == 0x0) && (instr->Bit(20) == 0x1)) {
+              // SDIV (in V8 notation matching ARM ISA format) rn = rm/rs
+              Format(instr, "sdiv'cond'b 'rn, 'rm, 'rs");
+              break;
+            }
+          }
+        }
+      }
       Format(instr, "'memop'cond'b 'rd, ['rn, -'shift_rm]'w");
       break;
     }
@@ -1077,6 +1098,7 @@ int Decoder::DecodeType7(Instruction* instr) {
 // Dd = vadd(Dn, Dm)
 // Dd = vsub(Dn, Dm)
 // Dd = vmul(Dn, Dm)
+// Dd = vmla(Dn, Dm)
 // Dd = vdiv(Dn, Dm)
 // vcmp(Dd, Dm)
 // vmrs
@@ -1139,6 +1161,12 @@ void Decoder::DecodeTypeVFP(Instruction* instr) {
       } else {
         Unknown(instr);  // Not used by V8.
       }
+    } else if ((instr->Opc1Value() == 0x0) && !(instr->Opc3Value() & 0x1)) {
+      if (instr->SzValue() == 0x1) {
+        Format(instr, "vmla.f64'cond 'Dd, 'Dn, 'Dm");
+      } else {
+        Unknown(instr);  // Not used by V8.
+      }
     } else if ((instr->Opc1Value() == 0x4) && !(instr->Opc3Value() & 0x1)) {
       if (instr->SzValue() == 0x1) {
         Format(instr, "vdiv.f64'cond 'Dd, 'Dn, 'Dm");
@@ -1367,7 +1395,7 @@ bool Decoder::IsConstantPoolAt(byte* instr_ptr) {
 int Decoder::ConstantPoolSizeAt(byte* instr_ptr) {
   if (IsConstantPoolAt(instr_ptr)) {
     int instruction_bits = *(reinterpret_cast<int*>(instr_ptr));
-    return instruction_bits & kConstantPoolLengthMask;
+    return DecodeConstantPoolLength(instruction_bits);
   } else {
     return -1;
   }
@@ -1389,8 +1417,7 @@ int Decoder::InstructionDecode(byte* instr_ptr) {
   if ((instruction_bits & kConstantPoolMarkerMask) == kConstantPoolMarker) {
     out_buffer_pos_ += OS::SNPrintF(out_buffer_ + out_buffer_pos_,
                                     "constant pool begin (length %d)",
-                                    instruction_bits &
-                                    kConstantPoolLengthMask);
+                                    DecodeConstantPoolLength(instruction_bits));
     return Instruction::kInstrSize;
   }
   switch (instr->TypeValue()) {
diff --git a/deps/v8/src/arm/full-codegen-arm.cc b/deps/v8/src/arm/full-codegen-arm.cc
index b2f629b26c..3b560fedfa 100644
--- a/deps/v8/src/arm/full-codegen-arm.cc
+++ b/deps/v8/src/arm/full-codegen-arm.cc
@@ -130,7 +130,7 @@ void FullCodeGenerator::Generate() {
   handler_table_ =
       isolate()->factory()->NewFixedArray(function()->handler_count(), TENURED);
   profiling_counter_ = isolate()->factory()->NewJSGlobalPropertyCell(
-      Handle<Smi>(Smi::FromInt(FLAG_interrupt_budget)));
+      Handle<Smi>(Smi::FromInt(FLAG_interrupt_budget), isolate()));
   SetFunctionPosition(function());
   Comment cmnt(masm_, "[ function compiled by full code generator");
 
@@ -164,14 +164,19 @@ void FullCodeGenerator::Generate() {
 
   int locals_count = info->scope()->num_stack_slots();
 
-  __ Push(lr, fp, cp, r1);
-  if (locals_count > 0) {
+  info->set_prologue_offset(masm_->pc_offset());
+  {
+    PredictableCodeSizeScope predictible_code_size_scope(
+        masm_, kNoCodeAgeSequenceLength * Assembler::kInstrSize);
+    // The following three instructions must remain together and unmodified
+    // for code aging to work properly.
+    __ stm(db_w, sp, r1.bit() | cp.bit() | fp.bit() | lr.bit());
     // Load undefined value here, so the value is ready for the loop
     // below.
     __ LoadRoot(ip, Heap::kUndefinedValueRootIndex);
+    // Adjust FP to point to saved FP.
+    __ add(fp, sp, Operand(2 * kPointerSize));
   }
-  // Adjust fp to point to caller's fp.
-  __ add(fp, sp, Operand(2 * kPointerSize));
 
   { Comment cmnt(masm_, "[ Allocate locals");
     for (int i = 0; i < locals_count; i++) {
@@ -287,6 +292,7 @@ void FullCodeGenerator::Generate() {
       __ LoadRoot(ip, Heap::kStackLimitRootIndex);
       __ cmp(sp, Operand(ip));
       __ b(hs, &ok);
+      PredictableCodeSizeScope predictable(masm_, 2 * Assembler::kInstrSize);
       StackCheckStub stub;
       __ CallStub(&stub);
       __ bind(&ok);
@@ -341,41 +347,31 @@ void FullCodeGenerator::EmitProfilingCounterReset() {
 }
 
 
-void FullCodeGenerator::EmitStackCheck(IterationStatement* stmt,
-                                       Label* back_edge_target) {
-  Comment cmnt(masm_, "[ Stack check");
+void FullCodeGenerator::EmitBackEdgeBookkeeping(IterationStatement* stmt,
+                                                Label* back_edge_target) {
+  Comment cmnt(masm_, "[ Back edge bookkeeping");
   // Block literal pools whilst emitting stack check code.
   Assembler::BlockConstPoolScope block_const_pool(masm_);
   Label ok;
 
-  if (FLAG_count_based_interrupts) {
-    int weight = 1;
-    if (FLAG_weighted_back_edges) {
-      ASSERT(back_edge_target->is_bound());
-      int distance = masm_->SizeOfCodeGeneratedSince(back_edge_target);
-      weight = Min(kMaxBackEdgeWeight,
-                   Max(1, distance / kBackEdgeDistanceUnit));
-    }
-    EmitProfilingCounterDecrement(weight);
-    __ b(pl, &ok);
-    InterruptStub stub;
-    __ CallStub(&stub);
-  } else {
-    __ LoadRoot(ip, Heap::kStackLimitRootIndex);
-    __ cmp(sp, Operand(ip));
-    __ b(hs, &ok);
-    StackCheckStub stub;
-    __ CallStub(&stub);
+  int weight = 1;
+  if (FLAG_weighted_back_edges) {
+    ASSERT(back_edge_target->is_bound());
+    int distance = masm_->SizeOfCodeGeneratedSince(back_edge_target);
+    weight = Min(kMaxBackEdgeWeight,
+                 Max(1, distance / kBackEdgeDistanceUnit));
   }
+  EmitProfilingCounterDecrement(weight);
+  __ b(pl, &ok);
+  InterruptStub stub;
+  __ CallStub(&stub);
 
   // Record a mapping of this PC offset to the OSR id.  This is used to find
   // the AST id from the unoptimized code in order to use it as a key into
   // the deoptimization input data found in the optimized code.
-  RecordStackCheck(stmt->OsrEntryId());
+  RecordBackEdge(stmt->OsrEntryId());
 
-  if (FLAG_count_based_interrupts) {
-    EmitProfilingCounterReset();
-  }
+  EmitProfilingCounterReset();
 
   __ bind(&ok);
   PrepareForBailoutForId(stmt->EntryId(), NO_REGISTERS);
@@ -437,6 +433,8 @@ void FullCodeGenerator::EmitReturnSequence() {
       // tool from instrumenting as we rely on the code size here.
       int32_t sp_delta = (info_->scope()->num_parameters() + 1) * kPointerSize;
       CodeGenerator::RecordPositions(masm_, function()->end_position() - 1);
+      // TODO(svenpanne) The code below is sometimes 4 words, sometimes 5!
+      PredictableCodeSizeScope predictable(masm_, -1);
       __ RecordJSReturn();
       masm_->mov(sp, fp);
       masm_->ldm(ia_w, sp, fp.bit() | lr.bit());
@@ -911,34 +909,33 @@ void FullCodeGenerator::VisitFunctionDeclaration(
 
 
 void FullCodeGenerator::VisitModuleDeclaration(ModuleDeclaration* declaration) {
-  VariableProxy* proxy = declaration->proxy();
-  Variable* variable = proxy->var();
-  Handle<JSModule> instance = declaration->module()->interface()->Instance();
-  ASSERT(!instance.is_null());
+  Variable* variable = declaration->proxy()->var();
+  ASSERT(variable->location() == Variable::CONTEXT);
+  ASSERT(variable->interface()->IsFrozen());
 
-  switch (variable->location()) {
-    case Variable::UNALLOCATED: {
-      Comment cmnt(masm_, "[ ModuleDeclaration");
-      globals_->Add(variable->name(), zone());
-      globals_->Add(instance, zone());
-      Visit(declaration->module());
-      break;
-    }
+  Comment cmnt(masm_, "[ ModuleDeclaration");
+  EmitDebugCheckDeclarationContext(variable);
 
-    case Variable::CONTEXT: {
-      Comment cmnt(masm_, "[ ModuleDeclaration");
-      EmitDebugCheckDeclarationContext(variable);
-      __ mov(r1, Operand(instance));
-      __ str(r1, ContextOperand(cp, variable->index()));
-      Visit(declaration->module());
-      break;
-    }
+  // Load instance object.
+  __ LoadContext(r1, scope_->ContextChainLength(scope_->GlobalScope()));
+  __ ldr(r1, ContextOperand(r1, variable->interface()->Index()));
+  __ ldr(r1, ContextOperand(r1, Context::EXTENSION_INDEX));
 
-    case Variable::PARAMETER:
-    case Variable::LOCAL:
-    case Variable::LOOKUP:
-      UNREACHABLE();
-  }
+  // Assign it.
+  __ str(r1, ContextOperand(cp, variable->index()));
+  // We know that we have written a module, which is not a smi.
+  __ RecordWriteContextSlot(cp,
+                            Context::SlotOffset(variable->index()),
+                            r1,
+                            r3,
+                            kLRHasBeenSaved,
+                            kDontSaveFPRegs,
+                            EMIT_REMEMBERED_SET,
+                            OMIT_SMI_CHECK);
+  PrepareForBailoutForId(declaration->proxy()->id(), NO_REGISTERS);
+
+  // Traverse into body.
+  Visit(declaration->module());
 }
 
 
@@ -981,6 +978,14 @@ void FullCodeGenerator::DeclareGlobals(Handle<FixedArray> pairs) {
 }
 
 
+void FullCodeGenerator::DeclareModules(Handle<FixedArray> descriptions) {
+  // Call the runtime to declare the modules.
+  __ Push(descriptions);
+  __ CallRuntime(Runtime::kDeclareModules, 1);
+  // Return value is ignored.
+}
+
+
 void FullCodeGenerator::VisitSwitchStatement(SwitchStatement* stmt) {
   Comment cmnt(masm_, "[ SwitchStatement");
   Breakable nested_statement(this, stmt);
@@ -1137,7 +1142,7 @@ void FullCodeGenerator::VisitForInStatement(ForInStatement* stmt) {
   __ cmp(r1, Operand(Smi::FromInt(0)));
   __ b(eq, &no_descriptors);
 
-  __ LoadInstanceDescriptors(r0, r2, r4);
+  __ LoadInstanceDescriptors(r0, r2);
   __ ldr(r2, FieldMemOperand(r2, DescriptorArray::kEnumCacheOffset));
   __ ldr(r2, FieldMemOperand(r2, DescriptorArray::kEnumCacheBridgeCacheOffset));
 
@@ -1235,7 +1240,7 @@ void FullCodeGenerator::VisitForInStatement(ForInStatement* stmt) {
   __ add(r0, r0, Operand(Smi::FromInt(1)));
   __ push(r0);
 
-  EmitStackCheck(stmt, &loop);
+  EmitBackEdgeBookkeeping(stmt, &loop);
   __ b(&loop);
 
   // Remove the pointers stored on the stack.
@@ -1388,9 +1393,9 @@ void FullCodeGenerator::EmitDynamicLookupFastCase(Variable* var,
   } else if (var->mode() == DYNAMIC_LOCAL) {
     Variable* local = var->local_if_not_shadowed();
     __ ldr(r0, ContextSlotOperandCheckExtensions(local, slow));
-    if (local->mode() == CONST ||
-        local->mode() == CONST_HARMONY ||
-        local->mode() == LET) {
+    if (local->mode() == LET ||
+        local->mode() == CONST ||
+        local->mode() == CONST_HARMONY) {
       __ CompareRoot(r0, Heap::kTheHoleValueRootIndex);
       if (local->mode() == CONST) {
         __ LoadRoot(r0, Heap::kUndefinedValueRootIndex, eq);
@@ -2183,43 +2188,16 @@ void FullCodeGenerator::EmitNamedPropertyAssignment(Assignment* expr) {
   ASSERT(prop != NULL);
   ASSERT(prop->key()->AsLiteral() != NULL);
 
-  // If the assignment starts a block of assignments to the same object,
-  // change to slow case to avoid the quadratic behavior of repeatedly
-  // adding fast properties.
-  if (expr->starts_initialization_block()) {
-    __ push(result_register());
-    __ ldr(ip, MemOperand(sp, kPointerSize));  // Receiver is now under value.
-    __ push(ip);
-    __ CallRuntime(Runtime::kToSlowProperties, 1);
-    __ pop(result_register());
-  }
-
   // Record source code position before IC call.
   SetSourcePosition(expr->position());
   __ mov(r2, Operand(prop->key()->AsLiteral()->handle()));
-  // Load receiver to r1. Leave a copy in the stack if needed for turning the
-  // receiver into fast case.
-  if (expr->ends_initialization_block()) {
-    __ ldr(r1, MemOperand(sp));
-  } else {
-    __ pop(r1);
-  }
+  __ pop(r1);
 
   Handle<Code> ic = is_classic_mode()
       ? isolate()->builtins()->StoreIC_Initialize()
       : isolate()->builtins()->StoreIC_Initialize_Strict();
   CallIC(ic, RelocInfo::CODE_TARGET, expr->AssignmentFeedbackId());
 
-  // If the assignment ends an initialization block, revert to fast case.
-  if (expr->ends_initialization_block()) {
-    __ push(r0);  // Result of assignment, saved even if not needed.
-    // Receiver is under the result value.
-    __ ldr(ip, MemOperand(sp, kPointerSize));
-    __ push(ip);
-    __ CallRuntime(Runtime::kToFastProperties, 1);
-    __ pop(r0);
-    __ Drop(1);
-  }
   PrepareForBailoutForId(expr->AssignmentId(), TOS_REG);
   context()->Plug(r0);
 }
@@ -2228,44 +2206,16 @@ void FullCodeGenerator::EmitNamedPropertyAssignment(Assignment* expr) {
 void FullCodeGenerator::EmitKeyedPropertyAssignment(Assignment* expr) {
   // Assignment to a property, using a keyed store IC.
 
-  // If the assignment starts a block of assignments to the same object,
-  // change to slow case to avoid the quadratic behavior of repeatedly
-  // adding fast properties.
-  if (expr->starts_initialization_block()) {
-    __ push(result_register());
-    // Receiver is now under the key and value.
-    __ ldr(ip, MemOperand(sp, 2 * kPointerSize));
-    __ push(ip);
-    __ CallRuntime(Runtime::kToSlowProperties, 1);
-    __ pop(result_register());
-  }
-
   // Record source code position before IC call.
   SetSourcePosition(expr->position());
   __ pop(r1);  // Key.
-  // Load receiver to r2. Leave a copy in the stack if needed for turning the
-  // receiver into fast case.
-  if (expr->ends_initialization_block()) {
-    __ ldr(r2, MemOperand(sp));
-  } else {
-    __ pop(r2);
-  }
+  __ pop(r2);
 
   Handle<Code> ic = is_classic_mode()
       ? isolate()->builtins()->KeyedStoreIC_Initialize()
       : isolate()->builtins()->KeyedStoreIC_Initialize_Strict();
   CallIC(ic, RelocInfo::CODE_TARGET, expr->AssignmentFeedbackId());
 
-  // If the assignment ends an initialization block, revert to fast case.
-  if (expr->ends_initialization_block()) {
-    __ push(r0);  // Result of assignment, saved even if not needed.
-    // Receiver is under the result value.
-    __ ldr(ip, MemOperand(sp, kPointerSize));
-    __ push(ip);
-    __ CallRuntime(Runtime::kToFastProperties, 1);
-    __ pop(r0);
-    __ Drop(1);
-  }
   PrepareForBailoutForId(expr->AssignmentId(), TOS_REG);
   context()->Plug(r0);
 }
@@ -2294,7 +2244,9 @@ void FullCodeGenerator::CallIC(Handle<Code> code,
                                RelocInfo::Mode rmode,
                                TypeFeedbackId ast_id) {
   ic_total_count_++;
-  __ Call(code, rmode, ast_id);
+  // All calls must have a predictable size in full-codegen code to ensure that
+  // the debugger can patch them correctly.
+  __ Call(code, rmode, ast_id, al, NEVER_INLINE_TARGET_ADDRESS);
 }
 
 void FullCodeGenerator::EmitCallWithIC(Call* expr,
@@ -2424,7 +2376,7 @@ void FullCodeGenerator::VisitCall(Call* expr) {
   VariableProxy* proxy = callee->AsVariableProxy();
   Property* property = callee->AsProperty();
 
-  if (proxy != NULL && proxy->var()->is_possibly_eval()) {
+  if (proxy != NULL && proxy->var()->is_possibly_eval(isolate())) {
     // In a call to eval, we first call %ResolvePossiblyDirectEval to
     // resolve the function we need to call and the receiver of the
     // call.  Then we call the resolved function using the given
@@ -2714,7 +2666,7 @@ void FullCodeGenerator::EmitIsStringWrapperSafeForDefaultValueOf(
   context()->PrepareTest(&materialize_true, &materialize_false,
                          &if_true, &if_false, &fall_through);
 
-  if (generate_debug_code_) __ AbortIfSmi(r0);
+  __ AssertNotSmi(r0);
 
   __ ldr(r1, FieldMemOperand(r0, HeapObject::kMapOffset));
   __ ldrb(ip, FieldMemOperand(r1, Map::kBitField2Offset));
@@ -2729,26 +2681,31 @@ void FullCodeGenerator::EmitIsStringWrapperSafeForDefaultValueOf(
   __ b(eq, if_false);
 
   // Look for valueOf symbol in the descriptor array, and indicate false if
-  // found. The type is not checked, so if it is a transition it is a false
-  // negative.
-  __ LoadInstanceDescriptors(r1, r4, r3);
-  __ ldr(r3, FieldMemOperand(r4, FixedArray::kLengthOffset));
-  // r4: descriptor array
-  // r3: length of descriptor array
-  // Calculate the end of the descriptor array.
+  // found. Since we omit an enumeration index check, if it is added via a
+  // transition that shares its descriptor array, this is a false positive.
+  Label entry, loop, done;
+
+  // Skip loop if no descriptors are valid.
+  __ NumberOfOwnDescriptors(r3, r1);
+  __ cmp(r3, Operand(0));
+  __ b(eq, &done);
+
+  __ LoadInstanceDescriptors(r1, r4);
+  // r4: descriptor array.
+  // r3: valid entries in the descriptor array.
   STATIC_ASSERT(kSmiTag == 0);
   STATIC_ASSERT(kSmiTagSize == 1);
   STATIC_ASSERT(kPointerSize == 4);
-  __ add(r2, r4, Operand(FixedArray::kHeaderSize - kHeapObjectTag));
+  __ mov(ip, Operand(DescriptorArray::kDescriptorSize));
+  __ mul(r3, r3, ip);
+  // Calculate location of the first key name.
+  __ add(r4, r4, Operand(DescriptorArray::kFirstOffset - kHeapObjectTag));
+  // Calculate the end of the descriptor array.
+  __ mov(r2, r4);
   __ add(r2, r2, Operand(r3, LSL, kPointerSizeLog2 - kSmiTagSize));
 
-  // Calculate location of the first key name.
-  __ add(r4,
-         r4,
-         Operand(DescriptorArray::kFirstOffset - kHeapObjectTag));
   // Loop through all the keys in the descriptor array. If one of these is the
   // symbol valueOf the result is false.
-  Label entry, loop;
   // The use of ip to store the valueOf symbol asumes that it is not otherwise
   // used in the loop below.
   __ mov(ip, Operand(FACTORY->value_of_symbol()));
@@ -2762,7 +2719,8 @@ void FullCodeGenerator::EmitIsStringWrapperSafeForDefaultValueOf(
   __ cmp(r4, Operand(r2));
   __ b(ne, &loop);
 
-  // If a valueOf property is not found on the object check that it's
+  __ bind(&done);
+  // If a valueOf property is not found on the object check that its
   // prototype is the un-modified String prototype. If not result is false.
   __ ldr(r2, FieldMemOperand(r1, Map::kPrototypeOffset));
   __ JumpIfSmi(r2, if_false);
@@ -3173,6 +3131,39 @@ void FullCodeGenerator::EmitDateField(CallRuntime* expr) {
 }
 
 
+void FullCodeGenerator::EmitOneByteSeqStringSetChar(CallRuntime* expr) {
+  ZoneList<Expression*>* args = expr->arguments();
+  ASSERT_EQ(3, args->length());
+
+  VisitForStackValue(args->at(1));  // index
+  VisitForStackValue(args->at(2));  // value
+  __ pop(r2);
+  __ pop(r1);
+  VisitForAccumulatorValue(args->at(0));  // string
+
+  static const String::Encoding encoding = String::ONE_BYTE_ENCODING;
+  SeqStringSetCharGenerator::Generate(masm_, encoding, r0, r1, r2);
+  context()->Plug(r0);
+}
+
+
+void FullCodeGenerator::EmitTwoByteSeqStringSetChar(CallRuntime* expr) {
+  ZoneList<Expression*>* args = expr->arguments();
+  ASSERT_EQ(3, args->length());
+
+  VisitForStackValue(args->at(1));  // index
+  VisitForStackValue(args->at(2));  // value
+  __ pop(r2);
+  __ pop(r1);
+  VisitForAccumulatorValue(args->at(0));  // string
+
+  static const String::Encoding encoding = String::TWO_BYTE_ENCODING;
+  SeqStringSetCharGenerator::Generate(masm_, encoding, r0, r1, r2);
+  context()->Plug(r0);
+}
+
+
+
 void FullCodeGenerator::EmitMathPow(CallRuntime* expr) {
   // Load the arguments on the stack and call the runtime function.
   ZoneList<Expression*>* args = expr->arguments();
@@ -3583,8 +3574,7 @@ void FullCodeGenerator::EmitGetCachedArrayIndex(CallRuntime* expr) {
   ASSERT(args->length() == 1);
   VisitForAccumulatorValue(args->at(0));
 
-  __ AbortIfNotString(r0);
-
+  __ AssertString(r0);
 
   __ ldr(r0, FieldMemOperand(r0, String::kHashFieldOffset));
   __ IndexFromHash(r0, r0);
@@ -3666,7 +3656,7 @@ void FullCodeGenerator::EmitFastAsciiArrayJoin(CallRuntime* expr) {
   __ ldr(scratch1, FieldMemOperand(string, HeapObject::kMapOffset));
   __ ldrb(scratch1, FieldMemOperand(scratch1, Map::kInstanceTypeOffset));
   __ JumpIfInstanceTypeIsNotSequentialAscii(scratch1, scratch2, &bailout);
-  __ ldr(scratch1, FieldMemOperand(string, SeqAsciiString::kLengthOffset));
+  __ ldr(scratch1, FieldMemOperand(string, SeqOneByteString::kLengthOffset));
   __ add(string_length, string_length, Operand(scratch1), SetCC);
   __ b(vs, &bailout);
   __ cmp(element, elements_end);
@@ -3695,7 +3685,7 @@ void FullCodeGenerator::EmitFastAsciiArrayJoin(CallRuntime* expr) {
   // Add (separator length times array_length) - separator length to the
   // string_length to get the length of the result string. array_length is not
   // smi but the other values are, so the result is a smi
-  __ ldr(scratch1, FieldMemOperand(separator, SeqAsciiString::kLengthOffset));
+  __ ldr(scratch1, FieldMemOperand(separator, SeqOneByteString::kLengthOffset));
   __ sub(string_length, string_length, Operand(scratch1));
   __ smull(scratch2, ip, array_length, scratch1);
   // Check for smi overflow. No overflow if higher 33 bits of 64-bit result are
@@ -3733,10 +3723,10 @@ void FullCodeGenerator::EmitFastAsciiArrayJoin(CallRuntime* expr) {
   array_length = no_reg;
   __ add(result_pos,
          result,
-         Operand(SeqAsciiString::kHeaderSize - kHeapObjectTag));
+         Operand(SeqOneByteString::kHeaderSize - kHeapObjectTag));
 
   // Check the length of the separator.
-  __ ldr(scratch1, FieldMemOperand(separator, SeqAsciiString::kLengthOffset));
+  __ ldr(scratch1, FieldMemOperand(separator, SeqOneByteString::kLengthOffset));
   __ cmp(scratch1, Operand(Smi::FromInt(1)));
   __ b(eq, &one_char_separator);
   __ b(gt, &long_separator);
@@ -3752,7 +3742,9 @@ void FullCodeGenerator::EmitFastAsciiArrayJoin(CallRuntime* expr) {
   __ ldr(string, MemOperand(element, kPointerSize, PostIndex));
   __ ldr(string_length, FieldMemOperand(string, String::kLengthOffset));
   __ SmiUntag(string_length);
-  __ add(string, string, Operand(SeqAsciiString::kHeaderSize - kHeapObjectTag));
+  __ add(string,
+         string,
+         Operand(SeqOneByteString::kHeaderSize - kHeapObjectTag));
   __ CopyBytes(string, result_pos, string_length, scratch1);
   __ cmp(element, elements_end);
   __ b(lt, &empty_separator_loop);  // End while (element < elements_end).
@@ -3762,7 +3754,7 @@ void FullCodeGenerator::EmitFastAsciiArrayJoin(CallRuntime* expr) {
   // One-character separator case
   __ bind(&one_char_separator);
   // Replace separator with its ASCII character value.
-  __ ldrb(separator, FieldMemOperand(separator, SeqAsciiString::kHeaderSize));
+  __ ldrb(separator, FieldMemOperand(separator, SeqOneByteString::kHeaderSize));
   // Jump into the loop after the code that copies the separator, so the first
   // element is not preceded by a separator
   __ jmp(&one_char_separator_loop_entry);
@@ -3782,7 +3774,9 @@ void FullCodeGenerator::EmitFastAsciiArrayJoin(CallRuntime* expr) {
   __ ldr(string, MemOperand(element, kPointerSize, PostIndex));
   __ ldr(string_length, FieldMemOperand(string, String::kLengthOffset));
   __ SmiUntag(string_length);
-  __ add(string, string, Operand(SeqAsciiString::kHeaderSize - kHeapObjectTag));
+  __ add(string,
+         string,
+         Operand(SeqOneByteString::kHeaderSize - kHeapObjectTag));
   __ CopyBytes(string, result_pos, string_length, scratch1);
   __ cmp(element, elements_end);
   __ b(lt, &one_char_separator_loop);  // End while (element < elements_end).
@@ -3803,14 +3797,16 @@ void FullCodeGenerator::EmitFastAsciiArrayJoin(CallRuntime* expr) {
   __ SmiUntag(string_length);
   __ add(string,
          separator,
-         Operand(SeqAsciiString::kHeaderSize - kHeapObjectTag));
+         Operand(SeqOneByteString::kHeaderSize - kHeapObjectTag));
   __ CopyBytes(string, result_pos, string_length, scratch1);
 
   __ bind(&long_separator);
   __ ldr(string, MemOperand(element, kPointerSize, PostIndex));
   __ ldr(string_length, FieldMemOperand(string, String::kLengthOffset));
   __ SmiUntag(string_length);
-  __ add(string, string, Operand(SeqAsciiString::kHeaderSize - kHeapObjectTag));
+  __ add(string,
+         string,
+         Operand(SeqOneByteString::kHeaderSize - kHeapObjectTag));
   __ CopyBytes(string, result_pos, string_length, scratch1);
   __ cmp(element, elements_end);
   __ b(lt, &long_separator_loop);  // End while (element < elements_end).
@@ -4115,7 +4111,8 @@ void FullCodeGenerator::VisitCountOperation(CountOperation* expr) {
     // Call stub. Undo operation first.
     __ sub(r0, r0, Operand(Smi::FromInt(count_value)));
   }
-  __ mov(r1, Operand(Smi::FromInt(count_value)));
+  __ mov(r1, r0);
+  __ mov(r0, Operand(Smi::FromInt(count_value)));
 
   // Record position before stub call.
   SetSourcePosition(expr->position());
@@ -4340,29 +4337,7 @@ void FullCodeGenerator::VisitCompareOperation(CompareOperation* expr) {
 
     default: {
       VisitForAccumulatorValue(expr->right());
-      Condition cond = eq;
-      switch (op) {
-        case Token::EQ_STRICT:
-        case Token::EQ:
-          cond = eq;
-          break;
-        case Token::LT:
-          cond = lt;
-          break;
-        case Token::GT:
-          cond = gt;
-         break;
-        case Token::LTE:
-          cond = le;
-          break;
-        case Token::GTE:
-          cond = ge;
-          break;
-        case Token::IN:
-        case Token::INSTANCEOF:
-        default:
-          UNREACHABLE();
-      }
+      Condition cond = CompareIC::ComputeCondition(op);
       __ pop(r1);
 
       bool inline_smi_code = ShouldInlineSmiCase(op);
diff --git a/deps/v8/src/arm/ic-arm.cc b/deps/v8/src/arm/ic-arm.cc
index 404f3c6145..29a3687aa9 100644
--- a/deps/v8/src/arm/ic-arm.cc
+++ b/deps/v8/src/arm/ic-arm.cc
@@ -1301,6 +1301,143 @@ void KeyedStoreIC::GenerateRuntimeSetProperty(MacroAssembler* masm,
 }
 
 
+static void KeyedStoreGenerateGenericHelper(
+    MacroAssembler* masm,
+    Label* fast_object,
+    Label* fast_double,
+    Label* slow,
+    KeyedStoreCheckMap check_map,
+    KeyedStoreIncrementLength increment_length,
+    Register value,
+    Register key,
+    Register receiver,
+    Register receiver_map,
+    Register elements_map,
+    Register elements) {
+  Label transition_smi_elements;
+  Label finish_object_store, non_double_value, transition_double_elements;
+  Label fast_double_without_map_check;
+
+  // Fast case: Do the store, could be either Object or double.
+  __ bind(fast_object);
+  Register scratch_value = r4;
+  Register address = r5;
+  if (check_map == kCheckMap) {
+    __ ldr(elements_map, FieldMemOperand(elements, HeapObject::kMapOffset));
+    __ cmp(elements_map,
+           Operand(masm->isolate()->factory()->fixed_array_map()));
+    __ b(ne, fast_double);
+  }
+  // Smi stores don't require further checks.
+  Label non_smi_value;
+  __ JumpIfNotSmi(value, &non_smi_value);
+
+  if (increment_length == kIncrementLength) {
+    // Add 1 to receiver->length.
+    __ add(scratch_value, key, Operand(Smi::FromInt(1)));
+    __ str(scratch_value, FieldMemOperand(receiver, JSArray::kLengthOffset));
+  }
+  // It's irrelevant whether array is smi-only or not when writing a smi.
+  __ add(address, elements, Operand(FixedArray::kHeaderSize - kHeapObjectTag));
+  __ add(address, address, Operand(key, LSL, kPointerSizeLog2 - kSmiTagSize));
+  __ str(value, MemOperand(address));
+  __ Ret();
+
+  __ bind(&non_smi_value);
+  // Escape to elements kind transition case.
+  __ CheckFastObjectElements(receiver_map, scratch_value,
+                             &transition_smi_elements);
+
+  // Fast elements array, store the value to the elements backing store.
+  __ bind(&finish_object_store);
+  if (increment_length == kIncrementLength) {
+    // Add 1 to receiver->length.
+    __ add(scratch_value, key, Operand(Smi::FromInt(1)));
+    __ str(scratch_value, FieldMemOperand(receiver, JSArray::kLengthOffset));
+  }
+  __ add(address, elements, Operand(FixedArray::kHeaderSize - kHeapObjectTag));
+  __ add(address, address, Operand(key, LSL, kPointerSizeLog2 - kSmiTagSize));
+  __ str(value, MemOperand(address));
+  // Update write barrier for the elements array address.
+  __ mov(scratch_value, value);  // Preserve the value which is returned.
+  __ RecordWrite(elements,
+                 address,
+                 scratch_value,
+                 kLRHasNotBeenSaved,
+                 kDontSaveFPRegs,
+                 EMIT_REMEMBERED_SET,
+                 OMIT_SMI_CHECK);
+  __ Ret();
+
+  __ bind(fast_double);
+  if (check_map == kCheckMap) {
+    // Check for fast double array case. If this fails, call through to the
+    // runtime.
+    __ CompareRoot(elements_map, Heap::kFixedDoubleArrayMapRootIndex);
+    __ b(ne, slow);
+  }
+  __ bind(&fast_double_without_map_check);
+  __ StoreNumberToDoubleElements(value,
+                                 key,
+                                 elements,  // Overwritten.
+                                 r3,        // Scratch regs...
+                                 r4,
+                                 r5,
+                                 r6,
+                                 &transition_double_elements);
+  if (increment_length == kIncrementLength) {
+    // Add 1 to receiver->length.
+    __ add(scratch_value, key, Operand(Smi::FromInt(1)));
+    __ str(scratch_value, FieldMemOperand(receiver, JSArray::kLengthOffset));
+  }
+  __ Ret();
+
+  __ bind(&transition_smi_elements);
+  // Transition the array appropriately depending on the value type.
+  __ ldr(r4, FieldMemOperand(value, HeapObject::kMapOffset));
+  __ CompareRoot(r4, Heap::kHeapNumberMapRootIndex);
+  __ b(ne, &non_double_value);
+
+  // Value is a double. Transition FAST_SMI_ELEMENTS ->
+  // FAST_DOUBLE_ELEMENTS and complete the store.
+  __ LoadTransitionedArrayMapConditional(FAST_SMI_ELEMENTS,
+                                         FAST_DOUBLE_ELEMENTS,
+                                         receiver_map,
+                                         r4,
+                                         slow);
+  ASSERT(receiver_map.is(r3));  // Transition code expects map in r3
+  ElementsTransitionGenerator::GenerateSmiToDouble(masm, slow);
+  __ ldr(elements, FieldMemOperand(receiver, JSObject::kElementsOffset));
+  __ jmp(&fast_double_without_map_check);
+
+  __ bind(&non_double_value);
+  // Value is not a double, FAST_SMI_ELEMENTS -> FAST_ELEMENTS
+  __ LoadTransitionedArrayMapConditional(FAST_SMI_ELEMENTS,
+                                         FAST_ELEMENTS,
+                                         receiver_map,
+                                         r4,
+                                         slow);
+  ASSERT(receiver_map.is(r3));  // Transition code expects map in r3
+  ElementsTransitionGenerator::GenerateMapChangeElementsTransition(masm);
+  __ ldr(elements, FieldMemOperand(receiver, JSObject::kElementsOffset));
+  __ jmp(&finish_object_store);
+
+  __ bind(&transition_double_elements);
+  // Elements are FAST_DOUBLE_ELEMENTS, but value is an Object that's not a
+  // HeapNumber. Make sure that the receiver is a Array with FAST_ELEMENTS and
+  // transition array from FAST_DOUBLE_ELEMENTS to FAST_ELEMENTS
+  __ LoadTransitionedArrayMapConditional(FAST_DOUBLE_ELEMENTS,
+                                         FAST_ELEMENTS,
+                                         receiver_map,
+                                         r4,
+                                         slow);
+  ASSERT(receiver_map.is(r3));  // Transition code expects map in r3
+  ElementsTransitionGenerator::GenerateDoubleToObject(masm, slow);
+  __ ldr(elements, FieldMemOperand(receiver, JSObject::kElementsOffset));
+  __ jmp(&finish_object_store);
+}
+
+
 void KeyedStoreIC::GenerateGeneric(MacroAssembler* masm,
                                    StrictModeFlag strict_mode) {
   // ---------- S t a t e --------------
@@ -1309,11 +1446,9 @@ void KeyedStoreIC::GenerateGeneric(MacroAssembler* masm,
   //  -- r2     : receiver
   //  -- lr     : return address
   // -----------------------------------
-  Label slow, array, extra, check_if_double_array;
-  Label fast_object_with_map_check, fast_object_without_map_check;
-  Label fast_double_with_map_check, fast_double_without_map_check;
-  Label transition_smi_elements, finish_object_store, non_double_value;
-  Label transition_double_elements;
+  Label slow, fast_object, fast_object_grow;
+  Label fast_double, fast_double_grow;
+  Label array, extra, check_if_double_array;
 
   // Register usage.
   Register value = r0;
@@ -1348,7 +1483,7 @@ void KeyedStoreIC::GenerateGeneric(MacroAssembler* masm,
   // Check array bounds. Both the key and the length of FixedArray are smis.
   __ ldr(ip, FieldMemOperand(elements, FixedArray::kLengthOffset));
   __ cmp(key, Operand(ip));
-  __ b(lo, &fast_object_with_map_check);
+  __ b(lo, &fast_object);
 
   // Slow case, handle jump to runtime.
   __ bind(&slow);
@@ -1373,21 +1508,13 @@ void KeyedStoreIC::GenerateGeneric(MacroAssembler* masm,
   __ cmp(elements_map,
          Operand(masm->isolate()->factory()->fixed_array_map()));
   __ b(ne, &check_if_double_array);
-  // Calculate key + 1 as smi.
-  STATIC_ASSERT(kSmiTag == 0);
-  __ add(r4, key, Operand(Smi::FromInt(1)));
-  __ str(r4, FieldMemOperand(receiver, JSArray::kLengthOffset));
-  __ b(&fast_object_without_map_check);
+  __ jmp(&fast_object_grow);
 
   __ bind(&check_if_double_array);
   __ cmp(elements_map,
          Operand(masm->isolate()->factory()->fixed_double_array_map()));
   __ b(ne, &slow);
-  // Add 1 to key, and go to common element store code for doubles.
-  STATIC_ASSERT(kSmiTag == 0);
-  __ add(r4, key, Operand(Smi::FromInt(1)));
-  __ str(r4, FieldMemOperand(receiver, JSArray::kLengthOffset));
-  __ jmp(&fast_double_without_map_check);
+  __ jmp(&fast_double_grow);
 
   // Array case: Get the length and the elements array from the JS
   // array. Check that the array is in fast mode (and writable); if it
@@ -1399,106 +1526,15 @@ void KeyedStoreIC::GenerateGeneric(MacroAssembler* masm,
   __ ldr(ip, FieldMemOperand(receiver, JSArray::kLengthOffset));
   __ cmp(key, Operand(ip));
   __ b(hs, &extra);
-  // Fall through to fast case.
-
-  __ bind(&fast_object_with_map_check);
-  Register scratch_value = r4;
-  Register address = r5;
-  __ ldr(elements_map, FieldMemOperand(elements, HeapObject::kMapOffset));
-  __ cmp(elements_map,
-         Operand(masm->isolate()->factory()->fixed_array_map()));
-  __ b(ne, &fast_double_with_map_check);
-  __ bind(&fast_object_without_map_check);
-  // Smi stores don't require further checks.
-  Label non_smi_value;
-  __ JumpIfNotSmi(value, &non_smi_value);
-  // It's irrelevant whether array is smi-only or not when writing a smi.
-  __ add(address, elements, Operand(FixedArray::kHeaderSize - kHeapObjectTag));
-  __ add(address, address, Operand(key, LSL, kPointerSizeLog2 - kSmiTagSize));
-  __ str(value, MemOperand(address));
-  __ Ret();
 
-  __ bind(&non_smi_value);
-  // Escape to elements kind transition case.
-  __ CheckFastObjectElements(receiver_map, scratch_value,
-                             &transition_smi_elements);
-  // Fast elements array, store the value to the elements backing store.
-  __ bind(&finish_object_store);
-  __ add(address, elements, Operand(FixedArray::kHeaderSize - kHeapObjectTag));
-  __ add(address, address, Operand(key, LSL, kPointerSizeLog2 - kSmiTagSize));
-  __ str(value, MemOperand(address));
-  // Update write barrier for the elements array address.
-  __ mov(scratch_value, value);  // Preserve the value which is returned.
-  __ RecordWrite(elements,
-                 address,
-                 scratch_value,
-                 kLRHasNotBeenSaved,
-                 kDontSaveFPRegs,
-                 EMIT_REMEMBERED_SET,
-                 OMIT_SMI_CHECK);
-  __ Ret();
-
-  __ bind(&fast_double_with_map_check);
-  // Check for fast double array case. If this fails, call through to the
-  // runtime.
-  __ cmp(elements_map,
-         Operand(masm->isolate()->factory()->fixed_double_array_map()));
-  __ b(ne, &slow);
-  __ bind(&fast_double_without_map_check);
-  __ StoreNumberToDoubleElements(value,
-                                 key,
-                                 receiver,
-                                 elements,
-                                 r3,
-                                 r4,
-                                 r5,
-                                 r6,
-                                 &transition_double_elements);
-  __ Ret();
-
-  __ bind(&transition_smi_elements);
-  // Transition the array appropriately depending on the value type.
-  __ ldr(r4, FieldMemOperand(value, HeapObject::kMapOffset));
-  __ CompareRoot(r4, Heap::kHeapNumberMapRootIndex);
-  __ b(ne, &non_double_value);
-
-  // Value is a double. Transition FAST_SMI_ELEMENTS ->
-  // FAST_DOUBLE_ELEMENTS and complete the store.
-  __ LoadTransitionedArrayMapConditional(FAST_SMI_ELEMENTS,
-                                         FAST_DOUBLE_ELEMENTS,
-                                         receiver_map,
-                                         r4,
-                                         &slow);
-  ASSERT(receiver_map.is(r3));  // Transition code expects map in r3
-  ElementsTransitionGenerator::GenerateSmiToDouble(masm, &slow);
-  __ ldr(elements, FieldMemOperand(receiver, JSObject::kElementsOffset));
-  __ jmp(&fast_double_without_map_check);
-
-  __ bind(&non_double_value);
-  // Value is not a double, FAST_SMI_ELEMENTS -> FAST_ELEMENTS
-  __ LoadTransitionedArrayMapConditional(FAST_SMI_ELEMENTS,
-                                         FAST_ELEMENTS,
-                                         receiver_map,
-                                         r4,
-                                         &slow);
-  ASSERT(receiver_map.is(r3));  // Transition code expects map in r3
-  ElementsTransitionGenerator::GenerateMapChangeElementsTransition(masm);
-  __ ldr(elements, FieldMemOperand(receiver, JSObject::kElementsOffset));
-  __ jmp(&finish_object_store);
-
-  __ bind(&transition_double_elements);
-  // Elements are FAST_DOUBLE_ELEMENTS, but value is an Object that's not a
-  // HeapNumber. Make sure that the receiver is a Array with FAST_ELEMENTS and
-  // transition array from FAST_DOUBLE_ELEMENTS to FAST_ELEMENTS
-  __ LoadTransitionedArrayMapConditional(FAST_DOUBLE_ELEMENTS,
-                                         FAST_ELEMENTS,
-                                         receiver_map,
-                                         r4,
-                                         &slow);
-  ASSERT(receiver_map.is(r3));  // Transition code expects map in r3
-  ElementsTransitionGenerator::GenerateDoubleToObject(masm, &slow);
-  __ ldr(elements, FieldMemOperand(receiver, JSObject::kElementsOffset));
-  __ jmp(&finish_object_store);
+  KeyedStoreGenerateGenericHelper(masm, &fast_object, &fast_double,
+                                  &slow, kCheckMap, kDontIncrementLength,
+                                  value, key, receiver, receiver_map,
+                                  elements_map, elements);
+  KeyedStoreGenerateGenericHelper(masm, &fast_object_grow, &fast_double_grow,
+                                  &slow, kDontCheckMap, kIncrementLength,
+                                  value, key, receiver, receiver_map,
+                                  elements_map, elements);
 }
 
 
@@ -1662,42 +1698,21 @@ Condition CompareIC::ComputeCondition(Token::Value op) {
 }
 
 
-void CompareIC::UpdateCaches(Handle<Object> x, Handle<Object> y) {
-  HandleScope scope;
-  Handle<Code> rewritten;
-  State previous_state = GetState();
-  State state = TargetState(previous_state, false, x, y);
-  if (state == GENERIC) {
-    CompareStub stub(GetCondition(), strict(), NO_COMPARE_FLAGS, r1, r0);
-    rewritten = stub.GetCode();
-  } else {
-    ICCompareStub stub(op_, state);
-    if (state == KNOWN_OBJECTS) {
-      stub.set_known_map(Handle<Map>(Handle<JSObject>::cast(x)->map()));
-    }
-    rewritten = stub.GetCode();
-  }
-  set_target(*rewritten);
-
-#ifdef DEBUG
-  if (FLAG_trace_ic) {
-    PrintF("[CompareIC (%s->%s)#%s]\n",
-           GetStateName(previous_state),
-           GetStateName(state),
-           Token::Name(op_));
-  }
-#endif
+bool CompareIC::HasInlinedSmiCode(Address address) {
+  // The address of the instruction following the call.
+  Address cmp_instruction_address =
+      Assembler::return_address_from_call_start(address);
 
-  // Activate inlined smi code.
-  if (previous_state == UNINITIALIZED) {
-    PatchInlinedSmiCode(address(), ENABLE_INLINED_SMI_CHECK);
-  }
+  // If the instruction following the call is not a cmp rx, #yyy, nothing
+  // was inlined.
+  Instr instr = Assembler::instr_at(cmp_instruction_address);
+  return Assembler::IsCmpImmediate(instr);
 }
 
 
 void PatchInlinedSmiCode(Address address, InlinedSmiCheck check) {
   Address cmp_instruction_address =
-      address + Assembler::kCallTargetAddressOffset;
+      Assembler::return_address_from_call_start(address);
 
   // If the instruction following the call is not a cmp rx, #yyy, nothing
   // was inlined.
diff --git a/deps/v8/src/arm/lithium-arm.cc b/deps/v8/src/arm/lithium-arm.cc
index fc1d64079a..4203673733 100644
--- a/deps/v8/src/arm/lithium-arm.cc
+++ b/deps/v8/src/arm/lithium-arm.cc
@@ -177,6 +177,7 @@ const char* LArithmeticT::Mnemonic() const {
     case Token::BIT_AND: return "bit-and-t";
     case Token::BIT_OR: return "bit-or-t";
     case Token::BIT_XOR: return "bit-xor-t";
+    case Token::ROR: return "ror-t";
     case Token::SHL: return "shl-t";
     case Token::SAR: return "sar-t";
     case Token::SHR: return "shr-t";
@@ -194,22 +195,22 @@ void LGoto::PrintDataTo(StringStream* stream) {
 
 void LBranch::PrintDataTo(StringStream* stream) {
   stream->Add("B%d | B%d on ", true_block_id(), false_block_id());
-  InputAt(0)->PrintTo(stream);
+  value()->PrintTo(stream);
 }
 
 
 void LCmpIDAndBranch::PrintDataTo(StringStream* stream) {
   stream->Add("if ");
-  InputAt(0)->PrintTo(stream);
+  left()->PrintTo(stream);
   stream->Add(" %s ", Token::String(op()));
-  InputAt(1)->PrintTo(stream);
+  right()->PrintTo(stream);
   stream->Add(" then B%d else B%d", true_block_id(), false_block_id());
 }
 
 
 void LIsNilAndBranch::PrintDataTo(StringStream* stream) {
   stream->Add("if ");
-  InputAt(0)->PrintTo(stream);
+  value()->PrintTo(stream);
   stream->Add(kind() == kStrictEquality ? " === " : " == ");
   stream->Add(nil() == kNullValue ? "null" : "undefined");
   stream->Add(" then B%d else B%d", true_block_id(), false_block_id());
@@ -218,57 +219,57 @@ void LIsNilAndBranch::PrintDataTo(StringStream* stream) {
 
 void LIsObjectAndBranch::PrintDataTo(StringStream* stream) {
   stream->Add("if is_object(");
-  InputAt(0)->PrintTo(stream);
+  value()->PrintTo(stream);
   stream->Add(") then B%d else B%d", true_block_id(), false_block_id());
 }
 
 
 void LIsStringAndBranch::PrintDataTo(StringStream* stream) {
   stream->Add("if is_string(");
-  InputAt(0)->PrintTo(stream);
+  value()->PrintTo(stream);
   stream->Add(") then B%d else B%d", true_block_id(), false_block_id());
 }
 
 
 void LIsSmiAndBranch::PrintDataTo(StringStream* stream) {
   stream->Add("if is_smi(");
-  InputAt(0)->PrintTo(stream);
+  value()->PrintTo(stream);
   stream->Add(") then B%d else B%d", true_block_id(), false_block_id());
 }
 
 
 void LIsUndetectableAndBranch::PrintDataTo(StringStream* stream) {
   stream->Add("if is_undetectable(");
-  InputAt(0)->PrintTo(stream);
+  value()->PrintTo(stream);
   stream->Add(") then B%d else B%d", true_block_id(), false_block_id());
 }
 
 
 void LStringCompareAndBranch::PrintDataTo(StringStream* stream) {
   stream->Add("if string_compare(");
-  InputAt(0)->PrintTo(stream);
-  InputAt(1)->PrintTo(stream);
+  left()->PrintTo(stream);
+  right()->PrintTo(stream);
   stream->Add(") then B%d else B%d", true_block_id(), false_block_id());
 }
 
 
 void LHasInstanceTypeAndBranch::PrintDataTo(StringStream* stream) {
   stream->Add("if has_instance_type(");
-  InputAt(0)->PrintTo(stream);
+  value()->PrintTo(stream);
   stream->Add(") then B%d else B%d", true_block_id(), false_block_id());
 }
 
 
 void LHasCachedArrayIndexAndBranch::PrintDataTo(StringStream* stream) {
   stream->Add("if has_cached_array_index(");
-  InputAt(0)->PrintTo(stream);
+  value()->PrintTo(stream);
   stream->Add(") then B%d else B%d", true_block_id(), false_block_id());
 }
 
 
 void LClassOfTestAndBranch::PrintDataTo(StringStream* stream) {
   stream->Add("if class_of_test(");
-  InputAt(0)->PrintTo(stream);
+  value()->PrintTo(stream);
   stream->Add(", \"%o\") then B%d else B%d",
               *hydrogen()->class_name(),
               true_block_id(),
@@ -278,7 +279,7 @@ void LClassOfTestAndBranch::PrintDataTo(StringStream* stream) {
 
 void LTypeofIsAndBranch::PrintDataTo(StringStream* stream) {
   stream->Add("if typeof ");
-  InputAt(0)->PrintTo(stream);
+  value()->PrintTo(stream);
   stream->Add(" == \"%s\" then B%d else B%d",
               *hydrogen()->type_literal()->ToCString(),
               true_block_id(), false_block_id());
@@ -292,26 +293,31 @@ void LCallConstantFunction::PrintDataTo(StringStream* stream) {
 
 void LUnaryMathOperation::PrintDataTo(StringStream* stream) {
   stream->Add("/%s ", hydrogen()->OpName());
-  InputAt(0)->PrintTo(stream);
+  value()->PrintTo(stream);
+}
+
+
+void LMathExp::PrintDataTo(StringStream* stream) {
+  value()->PrintTo(stream);
 }
 
 
 void LLoadContextSlot::PrintDataTo(StringStream* stream) {
-  InputAt(0)->PrintTo(stream);
+  context()->PrintTo(stream);
   stream->Add("[%d]", slot_index());
 }
 
 
 void LStoreContextSlot::PrintDataTo(StringStream* stream) {
-  InputAt(0)->PrintTo(stream);
+  context()->PrintTo(stream);
   stream->Add("[%d] <- ", slot_index());
-  InputAt(1)->PrintTo(stream);
+  value()->PrintTo(stream);
 }
 
 
 void LInvokeFunction::PrintDataTo(StringStream* stream) {
   stream->Add("= ");
-  InputAt(0)->PrintTo(stream);
+  function()->PrintTo(stream);
   stream->Add(" #%d / ", arity());
 }
 
@@ -340,17 +346,15 @@ void LCallKnownGlobal::PrintDataTo(StringStream* stream) {
 
 void LCallNew::PrintDataTo(StringStream* stream) {
   stream->Add("= ");
-  InputAt(0)->PrintTo(stream);
+  constructor()->PrintTo(stream);
   stream->Add(" #%d / ", arity());
 }
 
 
 void LAccessArgumentsAt::PrintDataTo(StringStream* stream) {
   arguments()->PrintTo(stream);
-
   stream->Add(" length ");
   length()->PrintTo(stream);
-
   stream->Add(" index ");
   index()->PrintTo(stream);
 }
@@ -374,20 +378,27 @@ void LStoreNamedGeneric::PrintDataTo(StringStream* stream) {
 }
 
 
-void LStoreKeyedFastElement::PrintDataTo(StringStream* stream) {
-  object()->PrintTo(stream);
+void LLoadKeyed::PrintDataTo(StringStream* stream) {
+  elements()->PrintTo(stream);
   stream->Add("[");
   key()->PrintTo(stream);
-  stream->Add("] <- ");
-  value()->PrintTo(stream);
+  if (hydrogen()->IsDehoisted()) {
+    stream->Add(" + %d]", additional_index());
+  } else {
+    stream->Add("]");
+  }
 }
 
 
-void LStoreKeyedFastDoubleElement::PrintDataTo(StringStream* stream) {
+void LStoreKeyed::PrintDataTo(StringStream* stream) {
   elements()->PrintTo(stream);
   stream->Add("[");
   key()->PrintTo(stream);
-  stream->Add("] <- ");
+  if (hydrogen()->IsDehoisted()) {
+    stream->Add(" + %d] <-", additional_index());
+  } else {
+    stream->Add("] <- ");
+  }
   value()->PrintTo(stream);
 }
 
@@ -860,6 +871,7 @@ LEnvironment* LChunkBuilder::CreateEnvironment(
       argument_count_,
       value_count,
       outer,
+      hydrogen_env->entry(),
       zone());
   int argument_index = *argument_index_accumulator;
   for (int i = 0; i < value_count; ++i) {
@@ -1034,6 +1046,15 @@ LInstruction* LChunkBuilder::DoUnaryMathOperation(HUnaryMathOperation* instr) {
     LOperand* input = UseFixedDouble(instr->value(), d2);
     LUnaryMathOperation* result = new(zone()) LUnaryMathOperation(input, NULL);
     return MarkAsCall(DefineFixedDouble(result, d2), instr);
+  } else if (op == kMathExp) {
+    ASSERT(instr->representation().IsDouble());
+    ASSERT(instr->value()->representation().IsDouble());
+    LOperand* input = UseTempRegister(instr->value());
+    LOperand* temp1 = TempRegister();
+    LOperand* temp2 = TempRegister();
+    LOperand* double_temp = FixedTemp(d3);  // Chosen by fair dice roll.
+    LMathExp* result = new(zone()) LMathExp(input, double_temp, temp1, temp2);
+    return DefineAsRegister(result);
   } else if (op == kMathPowHalf) {
     LOperand* input = UseFixedDouble(instr->value(), d2);
     LOperand* temp = FixedTemp(d3);
@@ -1041,7 +1062,8 @@ LInstruction* LChunkBuilder::DoUnaryMathOperation(HUnaryMathOperation* instr) {
     return DefineFixedDouble(result, d2);
   } else {
     LOperand* input = UseRegisterAtStart(instr->value());
-    LOperand* temp = (op == kMathFloor) ? TempRegister() : NULL;
+
+    LOperand* temp = (op == kMathRound) ? FixedTemp(d3) : NULL;
     LUnaryMathOperation* result = new(zone()) LUnaryMathOperation(input, temp);
     switch (op) {
       case kMathAbs:
@@ -1108,6 +1130,11 @@ LInstruction* LChunkBuilder::DoCallRuntime(HCallRuntime* instr) {
 }
 
 
+LInstruction* LChunkBuilder::DoRor(HRor* instr) {
+  return DoShift(Token::ROR, instr);
+}
+
+
 LInstruction* LChunkBuilder::DoShr(HShr* instr) {
   return DoShift(Token::SHR, instr);
 }
@@ -1306,8 +1333,21 @@ LInstruction* LChunkBuilder::DoMul(HMul* instr) {
     return DefineAsRegister(mul);
 
   } else if (instr->representation().IsDouble()) {
-    return DoArithmeticD(Token::MUL, instr);
+    if (instr->UseCount() == 1 && instr->uses().value()->IsAdd()) {
+      HAdd* add = HAdd::cast(instr->uses().value());
+      if (instr == add->left()) {
+        // This mul is the lhs of an add. The add and mul will be folded
+        // into a multiply-add.
+        return NULL;
+      }
+      if (instr == add->right() && !add->left()->IsMul()) {
+        // This mul is the rhs of an add, where the lhs is not another mul.
+        // The add and mul will be folded into a multiply-add.
+        return NULL;
+      }
+    }
 
+    return DoArithmeticD(Token::MUL, instr);
   } else {
     return DoArithmeticT(Token::MUL, instr);
   }
@@ -1318,6 +1358,12 @@ LInstruction* LChunkBuilder::DoSub(HSub* instr) {
   if (instr->representation().IsInteger32()) {
     ASSERT(instr->left()->representation().IsInteger32());
     ASSERT(instr->right()->representation().IsInteger32());
+
+    if (instr->left()->IsConstant()) {
+      // If lhs is constant, do reverse subtraction instead.
+      return DoRSub(instr);
+    }
+
     LOperand* left = UseRegisterAtStart(instr->left());
     LOperand* right = UseOrConstantAtStart(instr->right());
     LSubI* sub = new(zone()) LSubI(left, right);
@@ -1334,6 +1380,32 @@ LInstruction* LChunkBuilder::DoSub(HSub* instr) {
 }
 
 
+LInstruction* LChunkBuilder::DoRSub(HSub* instr) {
+  ASSERT(instr->representation().IsInteger32());
+  ASSERT(instr->left()->representation().IsInteger32());
+  ASSERT(instr->right()->representation().IsInteger32());
+
+  // Note: The lhs of the subtraction becomes the rhs of the
+  // reverse-subtraction.
+  LOperand* left = UseRegisterAtStart(instr->right());
+  LOperand* right = UseOrConstantAtStart(instr->left());
+  LRSubI* rsb = new(zone()) LRSubI(left, right);
+  LInstruction* result = DefineAsRegister(rsb);
+  if (instr->CheckFlag(HValue::kCanOverflow)) {
+    result = AssignEnvironment(result);
+  }
+  return result;
+}
+
+
+LInstruction* LChunkBuilder::DoMultiplyAdd(HMul* mul, HValue* addend) {
+  LOperand* multiplier_op = UseRegisterAtStart(mul->left());
+  LOperand* multiplicand_op = UseRegisterAtStart(mul->right());
+  LOperand* addend_op = UseRegisterAtStart(addend);
+  return DefineSameAsFirst(new(zone()) LMultiplyAddD(addend_op, multiplier_op,
+                                                     multiplicand_op));
+}
+
 LInstruction* LChunkBuilder::DoAdd(HAdd* instr) {
   if (instr->representation().IsInteger32()) {
     ASSERT(instr->left()->representation().IsInteger32());
@@ -1347,6 +1419,14 @@ LInstruction* LChunkBuilder::DoAdd(HAdd* instr) {
     }
     return result;
   } else if (instr->representation().IsDouble()) {
+    if (instr->left()->IsMul())
+      return DoMultiplyAdd(HMul::cast(instr->left()), instr->right());
+
+    if (instr->right()->IsMul()) {
+      ASSERT(!instr->left()->IsMul());
+      return DoMultiplyAdd(HMul::cast(instr->right()), instr->left());
+    }
+
     return DoArithmeticD(Token::ADD, instr);
   } else {
     ASSERT(instr->representation().IsTagged());
@@ -1412,7 +1492,7 @@ LInstruction* LChunkBuilder::DoCompareGeneric(HCompareGeneric* instr) {
 
 LInstruction* LChunkBuilder::DoCompareIDAndBranch(
     HCompareIDAndBranch* instr) {
-  Representation r = instr->GetInputRepresentation();
+  Representation r = instr->representation();
   if (r.IsInteger32()) {
     ASSERT(instr->left()->representation().IsInteger32());
     ASSERT(instr->right()->representation().IsInteger32());
@@ -1566,6 +1646,16 @@ LInstruction* LChunkBuilder::DoDateField(HDateField* instr) {
 }
 
 
+LInstruction* LChunkBuilder::DoSeqStringSetChar(HSeqStringSetChar* instr) {
+  LOperand* string = UseRegister(instr->string());
+  LOperand* index = UseRegister(instr->index());
+  LOperand* value = UseRegister(instr->value());
+  LSeqStringSetChar* result =
+      new(zone()) LSeqStringSetChar(instr->encoding(), string, index, value);
+  return DefineAsRegister(result);
+}
+
+
 LInstruction* LChunkBuilder::DoBoundsCheck(HBoundsCheck* instr) {
   LOperand* value = UseRegisterOrConstantAtStart(instr->index());
   LOperand* length = UseRegister(instr->length());
@@ -1617,8 +1707,7 @@ LInstruction* LChunkBuilder::DoChange(HChange* instr) {
         LOperand* temp1 = TempRegister();
         LOperand* temp2 = instr->CanTruncateToInt32() ? TempRegister()
                                                       : NULL;
-        LOperand* temp3 = instr->CanTruncateToInt32() ? FixedTemp(d11)
-                                                      : NULL;
+        LOperand* temp3 = FixedTemp(d11);
         res = DefineSameAsFirst(new(zone()) LTaggedToI(value,
                                                        temp1,
                                                        temp2,
@@ -1690,10 +1779,10 @@ LInstruction* LChunkBuilder::DoCheckInstanceType(HCheckInstanceType* instr) {
 
 
 LInstruction* LChunkBuilder::DoCheckPrototypeMaps(HCheckPrototypeMaps* instr) {
-  LOperand* temp1 = TempRegister();
+  LUnallocated* temp1 = TempRegister();
   LOperand* temp2 = TempRegister();
-  LInstruction* result = new(zone()) LCheckPrototypeMaps(temp1, temp2);
-  return AssignEnvironment(result);
+  LCheckPrototypeMaps* result = new(zone()) LCheckPrototypeMaps(temp1, temp2);
+  return AssignEnvironment(Define(result, temp1));
 }
 
 
@@ -1861,53 +1950,40 @@ LInstruction* LChunkBuilder::DoLoadExternalArrayPointer(
 }
 
 
-LInstruction* LChunkBuilder::DoLoadKeyedFastElement(
-    HLoadKeyedFastElement* instr) {
-  ASSERT(instr->representation().IsTagged());
+LInstruction* LChunkBuilder::DoLoadKeyed(HLoadKeyed* instr) {
   ASSERT(instr->key()->representation().IsInteger32() ||
          instr->key()->representation().IsTagged());
-  LOperand* obj = UseRegisterAtStart(instr->object());
-  LOperand* key = UseRegisterOrConstantAtStart(instr->key());
-  LLoadKeyedFastElement* result = new(zone()) LLoadKeyedFastElement(obj, key);
-  if (instr->RequiresHoleCheck()) AssignEnvironment(result);
-  return DefineAsRegister(result);
-}
-
-
-LInstruction* LChunkBuilder::DoLoadKeyedFastDoubleElement(
-    HLoadKeyedFastDoubleElement* instr) {
-  ASSERT(instr->representation().IsDouble());
-  ASSERT(instr->key()->representation().IsInteger32() ||
-         instr->key()->representation().IsTagged());
-  LOperand* elements = UseTempRegister(instr->elements());
+  ElementsKind elements_kind = instr->elements_kind();
   LOperand* key = UseRegisterOrConstantAtStart(instr->key());
-  LLoadKeyedFastDoubleElement* result =
-      new(zone()) LLoadKeyedFastDoubleElement(elements, key);
-  return AssignEnvironment(DefineAsRegister(result));
-}
+  LLoadKeyed* result = NULL;
 
+  if (!instr->is_external()) {
+    LOperand* obj = NULL;
+    if (instr->representation().IsDouble()) {
+      obj = UseTempRegister(instr->elements());
+    } else {
+      ASSERT(instr->representation().IsTagged());
+      obj = UseRegisterAtStart(instr->elements());
+    }
+    result = new(zone()) LLoadKeyed(obj, key);
+  } else {
+    ASSERT(
+        (instr->representation().IsInteger32() &&
+         (elements_kind != EXTERNAL_FLOAT_ELEMENTS) &&
+         (elements_kind != EXTERNAL_DOUBLE_ELEMENTS)) ||
+        (instr->representation().IsDouble() &&
+         ((elements_kind == EXTERNAL_FLOAT_ELEMENTS) ||
+          (elements_kind == EXTERNAL_DOUBLE_ELEMENTS))));
+    LOperand* external_pointer = UseRegister(instr->elements());
+    result = new(zone()) LLoadKeyed(external_pointer, key);
+  }
 
-LInstruction* LChunkBuilder::DoLoadKeyedSpecializedArrayElement(
-    HLoadKeyedSpecializedArrayElement* instr) {
-  ElementsKind elements_kind = instr->elements_kind();
-  ASSERT(
-      (instr->representation().IsInteger32() &&
-       (elements_kind != EXTERNAL_FLOAT_ELEMENTS) &&
-       (elements_kind != EXTERNAL_DOUBLE_ELEMENTS)) ||
-      (instr->representation().IsDouble() &&
-       ((elements_kind == EXTERNAL_FLOAT_ELEMENTS) ||
-       (elements_kind == EXTERNAL_DOUBLE_ELEMENTS))));
-  ASSERT(instr->key()->representation().IsInteger32() ||
-         instr->key()->representation().IsTagged());
-  LOperand* external_pointer = UseRegister(instr->external_pointer());
-  LOperand* key = UseRegisterOrConstant(instr->key());
-  LLoadKeyedSpecializedArrayElement* result =
-      new(zone()) LLoadKeyedSpecializedArrayElement(external_pointer, key);
-  LInstruction* load_instr = DefineAsRegister(result);
+  DefineAsRegister(result);
   // An unsigned int array load might overflow and cause a deopt, make sure it
   // has an environment.
-  return (elements_kind == EXTERNAL_UNSIGNED_INT_ELEMENTS) ?
-      AssignEnvironment(load_instr) : load_instr;
+  bool can_deoptimize = instr->RequiresHoleCheck() ||
+      (elements_kind == EXTERNAL_UNSIGNED_INT_ELEMENTS);
+  return can_deoptimize ? AssignEnvironment(result) : result;
 }
 
 
@@ -1921,66 +1997,48 @@ LInstruction* LChunkBuilder::DoLoadKeyedGeneric(HLoadKeyedGeneric* instr) {
 }
 
 
-LInstruction* LChunkBuilder::DoStoreKeyedFastElement(
-    HStoreKeyedFastElement* instr) {
-  bool needs_write_barrier = instr->NeedsWriteBarrier();
-  ASSERT(instr->value()->representation().IsTagged());
-  ASSERT(instr->object()->representation().IsTagged());
-  ASSERT(instr->key()->representation().IsInteger32() ||
-         instr->key()->representation().IsTagged());
-
-  LOperand* obj = UseTempRegister(instr->object());
-  LOperand* val = needs_write_barrier
-      ? UseTempRegister(instr->value())
-      : UseRegisterAtStart(instr->value());
-  LOperand* key = needs_write_barrier
-      ? UseTempRegister(instr->key())
-      : UseRegisterOrConstantAtStart(instr->key());
-  return new(zone()) LStoreKeyedFastElement(obj, key, val);
-}
-
-
-LInstruction* LChunkBuilder::DoStoreKeyedFastDoubleElement(
-    HStoreKeyedFastDoubleElement* instr) {
-  ASSERT(instr->value()->representation().IsDouble());
-  ASSERT(instr->elements()->representation().IsTagged());
-  ASSERT(instr->key()->representation().IsInteger32() ||
-         instr->key()->representation().IsTagged());
-
-  LOperand* elements = UseRegisterAtStart(instr->elements());
-  LOperand* val = UseTempRegister(instr->value());
-  LOperand* key = UseRegisterOrConstantAtStart(instr->key());
+LInstruction* LChunkBuilder::DoStoreKeyed(HStoreKeyed* instr) {
+  ElementsKind elements_kind = instr->elements_kind();
 
-  return new(zone()) LStoreKeyedFastDoubleElement(elements, key, val);
-}
+  if (!instr->is_external()) {
+    ASSERT(instr->elements()->representation().IsTagged());
+    bool needs_write_barrier = instr->NeedsWriteBarrier();
+    LOperand* object = NULL;
+    LOperand* key = NULL;
+    LOperand* val = NULL;
+
+    if (instr->value()->representation().IsDouble()) {
+      object = UseRegisterAtStart(instr->elements());
+      val = UseTempRegister(instr->value());
+      key = UseRegisterOrConstantAtStart(instr->key());
+    } else {
+      ASSERT(instr->value()->representation().IsTagged());
+      object = UseTempRegister(instr->elements());
+      val = needs_write_barrier ? UseTempRegister(instr->value())
+          : UseRegisterAtStart(instr->value());
+      key = needs_write_barrier ? UseTempRegister(instr->key())
+          : UseRegisterOrConstantAtStart(instr->key());
+    }
 
+    return new(zone()) LStoreKeyed(object, key, val);
+  }
 
-LInstruction* LChunkBuilder::DoStoreKeyedSpecializedArrayElement(
-    HStoreKeyedSpecializedArrayElement* instr) {
-  ElementsKind elements_kind = instr->elements_kind();
   ASSERT(
       (instr->value()->representation().IsInteger32() &&
        (elements_kind != EXTERNAL_FLOAT_ELEMENTS) &&
        (elements_kind != EXTERNAL_DOUBLE_ELEMENTS)) ||
       (instr->value()->representation().IsDouble() &&
        ((elements_kind == EXTERNAL_FLOAT_ELEMENTS) ||
-       (elements_kind == EXTERNAL_DOUBLE_ELEMENTS))));
-  ASSERT(instr->external_pointer()->representation().IsExternal());
-  ASSERT(instr->key()->representation().IsInteger32() ||
-         instr->key()->representation().IsTagged());
-
-  LOperand* external_pointer = UseRegister(instr->external_pointer());
+        (elements_kind == EXTERNAL_DOUBLE_ELEMENTS))));
+  ASSERT(instr->elements()->representation().IsExternal());
   bool val_is_temp_register =
       elements_kind == EXTERNAL_PIXEL_ELEMENTS ||
       elements_kind == EXTERNAL_FLOAT_ELEMENTS;
-  LOperand* val = val_is_temp_register
-      ? UseTempRegister(instr->value())
+  LOperand* val = val_is_temp_register ? UseTempRegister(instr->value())
       : UseRegister(instr->value());
-  LOperand* key = UseRegisterOrConstant(instr->key());
-
-  return new(zone()) LStoreKeyedSpecializedArrayElement(external_pointer,
-                                                        key,
-                                                        val);
+  LOperand* key = UseRegisterOrConstantAtStart(instr->key());
+  LOperand* external_pointer = UseRegister(instr->elements());
+  return new(zone()) LStoreKeyed(external_pointer, key, val);
 }
 
 
@@ -2126,6 +2184,7 @@ LInstruction* LChunkBuilder::DoDeleteProperty(HDeleteProperty* instr) {
 
 
 LInstruction* LChunkBuilder::DoOsrEntry(HOsrEntry* instr) {
+  ASSERT(argument_count_ == 0);
   allocator_->MarkAsOsrEntry();
   current_block_->last_environment()->set_ast_id(instr->ast_id());
   return AssignEnvironment(new(zone()) LOsrEntry);
@@ -2164,12 +2223,10 @@ LInstruction* LChunkBuilder::DoArgumentsObject(HArgumentsObject* instr) {
 
 
 LInstruction* LChunkBuilder::DoAccessArgumentsAt(HAccessArgumentsAt* instr) {
-  LOperand* arguments = UseRegister(instr->arguments());
+  LOperand* args = UseRegister(instr->arguments());
   LOperand* length = UseTempRegister(instr->length());
   LOperand* index = UseRegister(instr->index());
-  LAccessArgumentsAt* result =
-      new(zone()) LAccessArgumentsAt(arguments, length, index);
-  return AssignEnvironment(DefineAsRegister(result));
+  return DefineAsRegister(new(zone()) LAccessArgumentsAt(args, length, index));
 }
 
 
@@ -2204,7 +2261,7 @@ LInstruction* LChunkBuilder::DoSimulate(HSimulate* instr) {
   env->set_ast_id(instr->ast_id());
 
   env->Drop(instr->pop_count());
-  for (int i = 0; i < instr->values()->length(); ++i) {
+  for (int i = instr->values()->length() - 1; i >= 0; --i) {
     HValue* value = instr->values()->at(i);
     if (instr->HasAssignedIndexAt(i)) {
       env->Bind(instr->GetAssignedIndexAt(i), value);
@@ -2253,6 +2310,7 @@ LInstruction* LChunkBuilder::DoEnterInlined(HEnterInlined* instr) {
   if (instr->arguments_var() != NULL) {
     inner->Bind(instr->arguments_var(), graph()->GetArgumentsObject());
   }
+  inner->set_entry(instr);
   current_block_->UpdateEnvironment(inner);
   chunk_->AddInlinedClosure(instr->closure());
   return NULL;
@@ -2264,7 +2322,7 @@ LInstruction* LChunkBuilder::DoLeaveInlined(HLeaveInlined* instr) {
 
   HEnvironment* env = current_block_->last_environment();
 
-  if (instr->arguments_pushed()) {
+  if (env->entry()->arguments_pushed()) {
     int argument_count = env->arguments_environment()->parameter_count();
     pop = new(zone()) LDrop(argument_count);
     argument_count_ -= argument_count;
@@ -2295,9 +2353,7 @@ LInstruction* LChunkBuilder::DoForInPrepareMap(HForInPrepareMap* instr) {
 
 LInstruction* LChunkBuilder::DoForInCacheArray(HForInCacheArray* instr) {
   LOperand* map = UseRegister(instr->map());
-  LOperand* scratch = TempRegister();
-  return AssignEnvironment(DefineAsRegister(
-      new(zone()) LForInCacheArray(map, scratch)));
+  return AssignEnvironment(DefineAsRegister(new(zone()) LForInCacheArray(map)));
 }
 
 
diff --git a/deps/v8/src/arm/lithium-arm.h b/deps/v8/src/arm/lithium-arm.h
index e6e102f762..7397b4bc8d 100644
--- a/deps/v8/src/arm/lithium-arm.h
+++ b/deps/v8/src/arm/lithium-arm.h
@@ -125,18 +125,18 @@ class LCodeGen;
   V(LoadFunctionPrototype)                      \
   V(LoadGlobalCell)                             \
   V(LoadGlobalGeneric)                          \
-  V(LoadKeyedFastDoubleElement)                 \
-  V(LoadKeyedFastElement)                       \
+  V(LoadKeyed)                                  \
   V(LoadKeyedGeneric)                           \
-  V(LoadKeyedSpecializedArrayElement)           \
   V(LoadNamedField)                             \
   V(LoadNamedFieldPolymorphic)                  \
   V(LoadNamedGeneric)                           \
   V(MapEnumLength)                              \
+  V(MathExp)                                    \
   V(MathFloorOfDiv)                             \
   V(MathMinMax)                                 \
   V(ModI)                                       \
   V(MulI)                                       \
+  V(MultiplyAddD)                               \
   V(NumberTagD)                                 \
   V(NumberTagI)                                 \
   V(NumberTagU)                                 \
@@ -150,6 +150,7 @@ class LCodeGen;
   V(Random)                                     \
   V(RegExpLiteral)                              \
   V(Return)                                     \
+  V(SeqStringSetChar)                           \
   V(ShiftI)                                     \
   V(SmiTag)                                     \
   V(SmiUntag)                                   \
@@ -157,10 +158,8 @@ class LCodeGen;
   V(StoreContextSlot)                           \
   V(StoreGlobalCell)                            \
   V(StoreGlobalGeneric)                         \
-  V(StoreKeyedFastDoubleElement)                \
-  V(StoreKeyedFastElement)                      \
+  V(StoreKeyed)                                 \
   V(StoreKeyedGeneric)                          \
-  V(StoreKeyedSpecializedArrayElement)          \
   V(StoreNamedField)                            \
   V(StoreNamedGeneric)                          \
   V(StringAdd)                                  \
@@ -169,6 +168,7 @@ class LCodeGen;
   V(StringCompareAndBranch)                     \
   V(StringLength)                               \
   V(SubI)                                       \
+  V(RSubI)                                      \
   V(TaggedToI)                                  \
   V(ThisFunction)                               \
   V(Throw)                                      \
@@ -261,9 +261,6 @@ class LInstruction: public ZoneObject {
   virtual bool HasResult() const = 0;
   virtual LOperand* result() = 0;
 
-  virtual int TempCount() = 0;
-  virtual LOperand* TempAt(int i) = 0;
-
   LOperand* FirstInput() { return InputAt(0); }
   LOperand* Output() { return HasResult() ? result() : NULL; }
 
@@ -277,6 +274,10 @@ class LInstruction: public ZoneObject {
   virtual int InputCount() = 0;
   virtual LOperand* InputAt(int i) = 0;
 
+  friend class TempIterator;
+  virtual int TempCount() = 0;
+  virtual LOperand* TempAt(int i) = 0;
+
   LEnvironment* environment_;
   SetOncePointer<LPointerMap> pointer_map_;
   HValue* hydrogen_value_;
@@ -296,11 +297,6 @@ class LTemplateInstruction: public LInstruction {
   void set_result(LOperand* operand) { results_[0] = operand; }
   LOperand* result() { return results_[0]; }
 
-  LOperand* InputAt(int i) { return inputs_[i]; }
-
-  int TempCount() { return T; }
-  LOperand* TempAt(int i) { return temps_[i]; }
-
  protected:
   EmbeddedContainer<LOperand*, R> results_;
   EmbeddedContainer<LOperand*, I> inputs_;
@@ -308,6 +304,10 @@ class LTemplateInstruction: public LInstruction {
 
  private:
   virtual int InputCount() { return I; }
+  virtual LOperand* InputAt(int i) { return inputs_[i]; }
+
+  virtual int TempCount() { return T; }
+  virtual LOperand* TempAt(int i) { return temps_[i]; }
 };
 
 
@@ -525,6 +525,8 @@ class LArgumentsLength: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = elements;
   }
 
+  LOperand* elements() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(ArgumentsLength, "arguments-length")
 };
 
@@ -551,16 +553,22 @@ class LModI: public LTemplateInstruction<1, 2, 3> {
   // Used for the standard case.
   LModI(LOperand* left,
         LOperand* right,
-        LOperand* temp1,
+        LOperand* temp,
         LOperand* temp2,
         LOperand* temp3) {
     inputs_[0] = left;
     inputs_[1] = right;
-    temps_[0] = temp1;
+    temps_[0] = temp;
     temps_[1] = temp2;
     temps_[2] = temp3;
   }
 
+  LOperand* left() { return inputs_[0]; }
+  LOperand* right() { return inputs_[1]; }
+  LOperand* temp() { return temps_[0]; }
+  LOperand* temp2() { return temps_[1]; }
+  LOperand* temp3() { return temps_[2]; }
+
   DECLARE_CONCRETE_INSTRUCTION(ModI, "mod-i")
   DECLARE_HYDROGEN_ACCESSOR(Mod)
 };
@@ -573,6 +581,9 @@ class LDivI: public LTemplateInstruction<1, 2, 0> {
     inputs_[1] = right;
   }
 
+  LOperand* left() { return inputs_[0]; }
+  LOperand* right() { return inputs_[1]; }
+
   DECLARE_CONCRETE_INSTRUCTION(DivI, "div-i")
   DECLARE_HYDROGEN_ACCESSOR(Div)
 };
@@ -588,6 +599,10 @@ class LMathFloorOfDiv: public LTemplateInstruction<1, 2, 1> {
     temps_[0] = temp;
   }
 
+  LOperand* left() { return inputs_[0]; }
+  LOperand* right() { return inputs_[1]; }
+  LOperand* temp() { return temps_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(MathFloorOfDiv, "math-floor-of-div")
   DECLARE_HYDROGEN_ACCESSOR(MathFloorOfDiv)
 };
@@ -601,11 +616,33 @@ class LMulI: public LTemplateInstruction<1, 2, 1> {
     temps_[0] = temp;
   }
 
+  LOperand* left() { return inputs_[0]; }
+  LOperand* right() { return inputs_[1]; }
+  LOperand* temp() { return temps_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(MulI, "mul-i")
   DECLARE_HYDROGEN_ACCESSOR(Mul)
 };
 
 
+// Instruction for computing multiplier * multiplicand + addend.
+class LMultiplyAddD: public LTemplateInstruction<1, 3, 0> {
+ public:
+  LMultiplyAddD(LOperand* addend, LOperand* multiplier,
+                LOperand* multiplicand) {
+    inputs_[0] = addend;
+    inputs_[1] = multiplier;
+    inputs_[2] = multiplicand;
+  }
+
+  LOperand* addend() { return inputs_[0]; }
+  LOperand* multiplier() { return inputs_[1]; }
+  LOperand* multiplicand() { return inputs_[2]; }
+
+  DECLARE_CONCRETE_INSTRUCTION(MultiplyAddD, "multiply-add-d")
+};
+
+
 class LCmpIDAndBranch: public LControlInstruction<2, 0> {
  public:
   LCmpIDAndBranch(LOperand* left, LOperand* right) {
@@ -613,12 +650,15 @@ class LCmpIDAndBranch: public LControlInstruction<2, 0> {
     inputs_[1] = right;
   }
 
+  LOperand* left() { return inputs_[0]; }
+  LOperand* right() { return inputs_[1]; }
+
   DECLARE_CONCRETE_INSTRUCTION(CmpIDAndBranch, "cmp-id-and-branch")
   DECLARE_HYDROGEN_ACCESSOR(CompareIDAndBranch)
 
   Token::Value op() const { return hydrogen()->token(); }
   bool is_double() const {
-    return hydrogen()->GetInputRepresentation().IsDouble();
+    return hydrogen()->representation().IsDouble();
   }
 
   virtual void PrintDataTo(StringStream* stream);
@@ -632,6 +672,9 @@ class LUnaryMathOperation: public LTemplateInstruction<1, 1, 1> {
     temps_[0] = temp;
   }
 
+  LOperand* value() { return inputs_[0]; }
+  LOperand* temp() { return temps_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(UnaryMathOperation, "unary-math-operation")
   DECLARE_HYDROGEN_ACCESSOR(UnaryMathOperation)
 
@@ -640,6 +683,30 @@ class LUnaryMathOperation: public LTemplateInstruction<1, 1, 1> {
 };
 
 
+class LMathExp: public LTemplateInstruction<1, 1, 3> {
+ public:
+  LMathExp(LOperand* value,
+           LOperand* double_temp,
+           LOperand* temp1,
+           LOperand* temp2) {
+    inputs_[0] = value;
+    temps_[0] = temp1;
+    temps_[1] = temp2;
+    temps_[2] = double_temp;
+    ExternalReference::InitializeMathExpData();
+  }
+
+  LOperand* value() { return inputs_[0]; }
+  LOperand* temp1() { return temps_[0]; }
+  LOperand* temp2() { return temps_[1]; }
+  LOperand* double_temp() { return temps_[2]; }
+
+  DECLARE_CONCRETE_INSTRUCTION(MathExp, "math-exp")
+
+  virtual void PrintDataTo(StringStream* stream);
+};
+
+
 class LCmpObjectEqAndBranch: public LControlInstruction<2, 0> {
  public:
   LCmpObjectEqAndBranch(LOperand* left, LOperand* right) {
@@ -647,6 +714,9 @@ class LCmpObjectEqAndBranch: public LControlInstruction<2, 0> {
     inputs_[1] = right;
   }
 
+  LOperand* left() { return inputs_[0]; }
+  LOperand* right() { return inputs_[1]; }
+
   DECLARE_CONCRETE_INSTRUCTION(CmpObjectEqAndBranch,
                                "cmp-object-eq-and-branch")
   DECLARE_HYDROGEN_ACCESSOR(CompareObjectEqAndBranch)
@@ -659,6 +729,8 @@ class LCmpConstantEqAndBranch: public LControlInstruction<1, 0> {
     inputs_[0] = left;
   }
 
+  LOperand* left() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(CmpConstantEqAndBranch,
                                "cmp-constant-eq-and-branch")
   DECLARE_HYDROGEN_ACCESSOR(CompareConstantEqAndBranch)
@@ -671,6 +743,8 @@ class LIsNilAndBranch: public LControlInstruction<1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(IsNilAndBranch, "is-nil-and-branch")
   DECLARE_HYDROGEN_ACCESSOR(IsNilAndBranch)
 
@@ -688,6 +762,9 @@ class LIsObjectAndBranch: public LControlInstruction<1, 1> {
     temps_[0] = temp;
   }
 
+  LOperand* value() { return inputs_[0]; }
+  LOperand* temp() { return temps_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(IsObjectAndBranch, "is-object-and-branch")
   DECLARE_HYDROGEN_ACCESSOR(IsObjectAndBranch)
 
@@ -702,6 +779,9 @@ class LIsStringAndBranch: public LControlInstruction<1, 1> {
     temps_[0] = temp;
   }
 
+  LOperand* value() { return inputs_[0]; }
+  LOperand* temp() { return temps_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(IsStringAndBranch, "is-string-and-branch")
   DECLARE_HYDROGEN_ACCESSOR(IsStringAndBranch)
 
@@ -715,6 +795,8 @@ class LIsSmiAndBranch: public LControlInstruction<1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(IsSmiAndBranch, "is-smi-and-branch")
   DECLARE_HYDROGEN_ACCESSOR(IsSmiAndBranch)
 
@@ -729,6 +811,9 @@ class LIsUndetectableAndBranch: public LControlInstruction<1, 1> {
     temps_[0] = temp;
   }
 
+  LOperand* value() { return inputs_[0]; }
+  LOperand* temp() { return temps_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(IsUndetectableAndBranch,
                                "is-undetectable-and-branch")
   DECLARE_HYDROGEN_ACCESSOR(IsUndetectableAndBranch)
@@ -744,6 +829,9 @@ class LStringCompareAndBranch: public LControlInstruction<2, 0> {
     inputs_[1] = right;
   }
 
+  LOperand* left() { return inputs_[0]; }
+  LOperand* right() { return inputs_[1]; }
+
   DECLARE_CONCRETE_INSTRUCTION(StringCompareAndBranch,
                                "string-compare-and-branch")
   DECLARE_HYDROGEN_ACCESSOR(StringCompareAndBranch)
@@ -760,6 +848,8 @@ class LHasInstanceTypeAndBranch: public LControlInstruction<1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(HasInstanceTypeAndBranch,
                                "has-instance-type-and-branch")
   DECLARE_HYDROGEN_ACCESSOR(HasInstanceTypeAndBranch)
@@ -774,6 +864,8 @@ class LGetCachedArrayIndex: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(GetCachedArrayIndex, "get-cached-array-index")
   DECLARE_HYDROGEN_ACCESSOR(GetCachedArrayIndex)
 };
@@ -785,6 +877,8 @@ class LHasCachedArrayIndexAndBranch: public LControlInstruction<1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(HasCachedArrayIndexAndBranch,
                                "has-cached-array-index-and-branch")
   DECLARE_HYDROGEN_ACCESSOR(HasCachedArrayIndexAndBranch)
@@ -800,6 +894,9 @@ class LClassOfTestAndBranch: public LControlInstruction<1, 1> {
     temps_[0] = temp;
   }
 
+  LOperand* value() { return inputs_[0]; }
+  LOperand* temp() { return temps_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(ClassOfTestAndBranch,
                                "class-of-test-and-branch")
   DECLARE_HYDROGEN_ACCESSOR(ClassOfTestAndBranch)
@@ -815,6 +912,9 @@ class LCmpT: public LTemplateInstruction<1, 2, 0> {
     inputs_[1] = right;
   }
 
+  LOperand* left() { return inputs_[0]; }
+  LOperand* right() { return inputs_[1]; }
+
   DECLARE_CONCRETE_INSTRUCTION(CmpT, "cmp-t")
   DECLARE_HYDROGEN_ACCESSOR(CompareGeneric)
 
@@ -829,6 +929,9 @@ class LInstanceOf: public LTemplateInstruction<1, 2, 0> {
     inputs_[1] = right;
   }
 
+  LOperand* left() { return inputs_[0]; }
+  LOperand* right() { return inputs_[1]; }
+
   DECLARE_CONCRETE_INSTRUCTION(InstanceOf, "instance-of")
 };
 
@@ -840,6 +943,9 @@ class LInstanceOfKnownGlobal: public LTemplateInstruction<1, 1, 1> {
     temps_[0] = temp;
   }
 
+  LOperand* value() { return inputs_[0]; }
+  LOperand* temp() { return temps_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(InstanceOfKnownGlobal,
                                "instance-of-known-global")
   DECLARE_HYDROGEN_ACCESSOR(InstanceOfKnownGlobal)
@@ -879,6 +985,9 @@ class LBitI: public LTemplateInstruction<1, 2, 0> {
     inputs_[1] = right;
   }
 
+  LOperand* left() { return inputs_[0]; }
+  LOperand* right() { return inputs_[1]; }
+
   Token::Value op() const { return hydrogen()->op(); }
 
   DECLARE_CONCRETE_INSTRUCTION(BitI, "bit-i")
@@ -895,7 +1004,8 @@ class LShiftI: public LTemplateInstruction<1, 2, 0> {
   }
 
   Token::Value op() const { return op_; }
-
+  LOperand* left() { return inputs_[0]; }
+  LOperand* right() { return inputs_[1]; }
   bool can_deopt() const { return can_deopt_; }
 
   DECLARE_CONCRETE_INSTRUCTION(ShiftI, "shift-i")
@@ -913,11 +1023,29 @@ class LSubI: public LTemplateInstruction<1, 2, 0> {
     inputs_[1] = right;
   }
 
+  LOperand* left() { return inputs_[0]; }
+  LOperand* right() { return inputs_[1]; }
+
   DECLARE_CONCRETE_INSTRUCTION(SubI, "sub-i")
   DECLARE_HYDROGEN_ACCESSOR(Sub)
 };
 
 
+class LRSubI: public LTemplateInstruction<1, 2, 0> {
+ public:
+  LRSubI(LOperand* left, LOperand* right) {
+    inputs_[0] = left;
+    inputs_[1] = right;
+  }
+
+  LOperand* left() { return inputs_[0]; }
+  LOperand* right() { return inputs_[1]; }
+
+  DECLARE_CONCRETE_INSTRUCTION(RSubI, "rsub-i")
+  DECLARE_HYDROGEN_ACCESSOR(Sub)
+};
+
+
 class LConstantI: public LTemplateInstruction<1, 0, 0> {
  public:
   DECLARE_CONCRETE_INSTRUCTION(ConstantI, "constant-i")
@@ -951,6 +1079,8 @@ class LBranch: public LControlInstruction<1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(Branch, "branch")
   DECLARE_HYDROGEN_ACCESSOR(Branch)
 
@@ -965,6 +1095,9 @@ class LCmpMapAndBranch: public LTemplateInstruction<0, 1, 1> {
     temps_[0] = temp;
   }
 
+  LOperand* value() { return inputs_[0]; }
+  LOperand* temp() { return temps_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(CmpMapAndBranch, "cmp-map-and-branch")
   DECLARE_HYDROGEN_ACCESSOR(CompareMap)
 
@@ -986,6 +1119,8 @@ class LJSArrayLength: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(JSArrayLength, "js-array-length")
   DECLARE_HYDROGEN_ACCESSOR(JSArrayLength)
 };
@@ -997,6 +1132,8 @@ class LFixedArrayBaseLength: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(FixedArrayBaseLength,
                                "fixed-array-base-length")
   DECLARE_HYDROGEN_ACCESSOR(FixedArrayBaseLength)
@@ -1009,6 +1146,8 @@ class LMapEnumLength: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(MapEnumLength, "map-enum-length")
 };
 
@@ -1019,6 +1158,8 @@ class LElementsKind: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(ElementsKind, "elements-kind")
   DECLARE_HYDROGEN_ACCESSOR(ElementsKind)
 };
@@ -1031,6 +1172,9 @@ class LValueOf: public LTemplateInstruction<1, 1, 1> {
     temps_[0] = temp;
   }
 
+  LOperand* value() { return inputs_[0]; }
+  LOperand* temp() { return temps_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(ValueOf, "value-of")
   DECLARE_HYDROGEN_ACCESSOR(ValueOf)
 };
@@ -1043,31 +1187,39 @@ class LDateField: public LTemplateInstruction<1, 1, 1> {
     temps_[0] = temp;
   }
 
+  LOperand* date() { return inputs_[0]; }
+  LOperand* temp() { return temps_[0]; }
+  Smi* index() const { return index_; }
+
   DECLARE_CONCRETE_INSTRUCTION(ValueOf, "date-field")
   DECLARE_HYDROGEN_ACCESSOR(ValueOf)
-  Smi* index() const { return index_; }
 
  private:
   Smi* index_;
 };
 
 
-class LSetDateField: public LTemplateInstruction<1, 2, 1> {
+class LSeqStringSetChar: public LTemplateInstruction<1, 3, 0> {
  public:
-  LSetDateField(LOperand* date, LOperand* value, LOperand* temp, int index)
-      : index_(index) {
-    inputs_[0] = date;
-    inputs_[1] = value;
-    temps_[0] = temp;
+  LSeqStringSetChar(String::Encoding encoding,
+                    LOperand* string,
+                    LOperand* index,
+                    LOperand* value) : encoding_(encoding) {
+    inputs_[0] = string;
+    inputs_[1] = index;
+    inputs_[2] = value;
   }
 
-  DECLARE_CONCRETE_INSTRUCTION(DateField, "date-set-field")
-  DECLARE_HYDROGEN_ACCESSOR(DateField)
+  String::Encoding encoding() { return encoding_; }
+  LOperand* string() { return inputs_[0]; }
+  LOperand* index() { return inputs_[1]; }
+  LOperand* value() { return inputs_[2]; }
 
-  int index() const { return index_; }
+  DECLARE_CONCRETE_INSTRUCTION(SeqStringSetChar, "seq-string-set-char")
+  DECLARE_HYDROGEN_ACCESSOR(SeqStringSetChar)
 
  private:
-  int index_;
+  String::Encoding encoding_;
 };
 
 
@@ -1077,6 +1229,8 @@ class LThrow: public LTemplateInstruction<0, 1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(Throw, "throw")
 };
 
@@ -1087,6 +1241,8 @@ class LBitNotI: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(BitNotI, "bit-not-i")
 };
 
@@ -1098,6 +1254,9 @@ class LAddI: public LTemplateInstruction<1, 2, 0> {
     inputs_[1] = right;
   }
 
+  LOperand* left() { return inputs_[0]; }
+  LOperand* right() { return inputs_[1]; }
+
   DECLARE_CONCRETE_INSTRUCTION(AddI, "add-i")
   DECLARE_HYDROGEN_ACCESSOR(Add)
 };
@@ -1110,6 +1269,9 @@ class LMathMinMax: public LTemplateInstruction<1, 2, 0> {
     inputs_[1] = right;
   }
 
+  LOperand* left() { return inputs_[0]; }
+  LOperand* right() { return inputs_[1]; }
+
   DECLARE_CONCRETE_INSTRUCTION(MathMinMax, "min-max")
   DECLARE_HYDROGEN_ACCESSOR(MathMinMax)
 };
@@ -1122,6 +1284,9 @@ class LPower: public LTemplateInstruction<1, 2, 0> {
     inputs_[1] = right;
   }
 
+  LOperand* left() { return inputs_[0]; }
+  LOperand* right() { return inputs_[1]; }
+
   DECLARE_CONCRETE_INSTRUCTION(Power, "power")
   DECLARE_HYDROGEN_ACCESSOR(Power)
 };
@@ -1133,6 +1298,8 @@ class LRandom: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = global_object;
   }
 
+  LOperand* global_object() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(Random, "random")
   DECLARE_HYDROGEN_ACCESSOR(Random)
 };
@@ -1147,6 +1314,8 @@ class LArithmeticD: public LTemplateInstruction<1, 2, 0> {
   }
 
   Token::Value op() const { return op_; }
+  LOperand* left() { return inputs_[0]; }
+  LOperand* right() { return inputs_[1]; }
 
   virtual Opcode opcode() const { return LInstruction::kArithmeticD; }
   virtual void CompileToNative(LCodeGen* generator);
@@ -1165,12 +1334,14 @@ class LArithmeticT: public LTemplateInstruction<1, 2, 0> {
     inputs_[1] = right;
   }
 
+  LOperand* left() { return inputs_[0]; }
+  LOperand* right() { return inputs_[1]; }
+  Token::Value op() const { return op_; }
+
   virtual Opcode opcode() const { return LInstruction::kArithmeticT; }
   virtual void CompileToNative(LCodeGen* generator);
   virtual const char* Mnemonic() const;
 
-  Token::Value op() const { return op_; }
-
  private:
   Token::Value op_;
 };
@@ -1182,6 +1353,8 @@ class LReturn: public LTemplateInstruction<0, 1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(Return, "return")
 };
 
@@ -1192,6 +1365,8 @@ class LLoadNamedField: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = object;
   }
 
+  LOperand* object() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(LoadNamedField, "load-named-field")
   DECLARE_HYDROGEN_ACCESSOR(LoadNamedField)
 };
@@ -1203,10 +1378,10 @@ class LLoadNamedFieldPolymorphic: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = object;
   }
 
+  LOperand* object() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(LoadNamedField, "load-named-field-polymorphic")
   DECLARE_HYDROGEN_ACCESSOR(LoadNamedFieldPolymorphic)
-
-  LOperand* object() { return inputs_[0]; }
 };
 
 
@@ -1216,10 +1391,11 @@ class LLoadNamedGeneric: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = object;
   }
 
+  LOperand* object() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(LoadNamedGeneric, "load-named-generic")
   DECLARE_HYDROGEN_ACCESSOR(LoadNamedGeneric)
 
-  LOperand* object() { return inputs_[0]; }
   Handle<Object> name() const { return hydrogen()->name(); }
 };
 
@@ -1230,10 +1406,10 @@ class LLoadFunctionPrototype: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = function;
   }
 
+  LOperand* function() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(LoadFunctionPrototype, "load-function-prototype")
   DECLARE_HYDROGEN_ACCESSOR(LoadFunctionPrototype)
-
-  LOperand* function() { return inputs_[0]; }
 };
 
 
@@ -1243,6 +1419,8 @@ class LLoadElements: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = object;
   }
 
+  LOperand* object() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(LoadElements, "load-elements")
 };
 
@@ -1253,75 +1431,48 @@ class LLoadExternalArrayPointer: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = object;
   }
 
+  LOperand* object() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(LoadExternalArrayPointer,
                                "load-external-array-pointer")
 };
 
 
-class LLoadKeyedFastElement: public LTemplateInstruction<1, 2, 0> {
+class LLoadKeyed: public LTemplateInstruction<1, 2, 0> {
  public:
-  LLoadKeyedFastElement(LOperand* elements, LOperand* key) {
+  LLoadKeyed(LOperand* elements, LOperand* key) {
     inputs_[0] = elements;
     inputs_[1] = key;
   }
 
-  DECLARE_CONCRETE_INSTRUCTION(LoadKeyedFastElement, "load-keyed-fast-element")
-  DECLARE_HYDROGEN_ACCESSOR(LoadKeyedFastElement)
-
   LOperand* elements() { return inputs_[0]; }
   LOperand* key() { return inputs_[1]; }
-  uint32_t additional_index() const { return hydrogen()->index_offset(); }
-};
-
-
-class LLoadKeyedFastDoubleElement: public LTemplateInstruction<1, 2, 0> {
- public:
-  LLoadKeyedFastDoubleElement(LOperand* elements, LOperand* key) {
-    inputs_[0] = elements;
-    inputs_[1] = key;
+  ElementsKind elements_kind() const {
+    return hydrogen()->elements_kind();
   }
-
-  DECLARE_CONCRETE_INSTRUCTION(LoadKeyedFastDoubleElement,
-                               "load-keyed-fast-double-element")
-  DECLARE_HYDROGEN_ACCESSOR(LoadKeyedFastDoubleElement)
-
-  LOperand* elements() { return inputs_[0]; }
-  LOperand* key() { return inputs_[1]; }
-  uint32_t additional_index() const { return hydrogen()->index_offset(); }
-};
-
-
-class LLoadKeyedSpecializedArrayElement: public LTemplateInstruction<1, 2, 0> {
- public:
-  LLoadKeyedSpecializedArrayElement(LOperand* external_pointer, LOperand* key) {
-    inputs_[0] = external_pointer;
-    inputs_[1] = key;
+  bool is_external() const {
+    return hydrogen()->is_external();
   }
 
-  DECLARE_CONCRETE_INSTRUCTION(LoadKeyedSpecializedArrayElement,
-                               "load-keyed-specialized-array-element")
-  DECLARE_HYDROGEN_ACCESSOR(LoadKeyedSpecializedArrayElement)
+  DECLARE_CONCRETE_INSTRUCTION(LoadKeyed, "load-keyed")
+  DECLARE_HYDROGEN_ACCESSOR(LoadKeyed)
 
-  LOperand* external_pointer() { return inputs_[0]; }
-  LOperand* key() { return inputs_[1]; }
-  ElementsKind elements_kind() const {
-    return hydrogen()->elements_kind();
-  }
+  virtual void PrintDataTo(StringStream* stream);
   uint32_t additional_index() const { return hydrogen()->index_offset(); }
 };
 
 
 class LLoadKeyedGeneric: public LTemplateInstruction<1, 2, 0> {
  public:
-  LLoadKeyedGeneric(LOperand* obj, LOperand* key) {
-    inputs_[0] = obj;
+  LLoadKeyedGeneric(LOperand* object, LOperand* key) {
+    inputs_[0] = object;
     inputs_[1] = key;
   }
 
-  DECLARE_CONCRETE_INSTRUCTION(LoadKeyedGeneric, "load-keyed-generic")
-
   LOperand* object() { return inputs_[0]; }
   LOperand* key() { return inputs_[1]; }
+
+  DECLARE_CONCRETE_INSTRUCTION(LoadKeyedGeneric, "load-keyed-generic")
 };
 
 
@@ -1338,10 +1489,11 @@ class LLoadGlobalGeneric: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = global_object;
   }
 
+  LOperand* global_object() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(LoadGlobalGeneric, "load-global-generic")
   DECLARE_HYDROGEN_ACCESSOR(LoadGlobalGeneric)
 
-  LOperand* global_object() { return inputs_[0]; }
   Handle<Object> name() const { return hydrogen()->name(); }
   bool for_typeof() const { return hydrogen()->for_typeof(); }
 };
@@ -1354,10 +1506,11 @@ class LStoreGlobalCell: public LTemplateInstruction<0, 1, 1> {
     temps_[0] = temp;
   }
 
+  LOperand* value() { return inputs_[0]; }
+  LOperand* temp() { return temps_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(StoreGlobalCell, "store-global-cell")
   DECLARE_HYDROGEN_ACCESSOR(StoreGlobalCell)
-
-  LOperand* value() { return inputs_[0]; }
 };
 
 
@@ -1369,12 +1522,13 @@ class LStoreGlobalGeneric: public LTemplateInstruction<0, 2, 0> {
     inputs_[1] = value;
   }
 
+  LOperand* global_object() { return inputs_[0]; }
+  LOperand* value() { return inputs_[1]; }
+
   DECLARE_CONCRETE_INSTRUCTION(StoreGlobalGeneric, "store-global-generic")
   DECLARE_HYDROGEN_ACCESSOR(StoreGlobalGeneric)
 
-  LOperand* global_object() { return InputAt(0); }
   Handle<Object> name() const { return hydrogen()->name(); }
-  LOperand* value() { return InputAt(1); }
   StrictModeFlag strict_mode_flag() { return hydrogen()->strict_mode_flag(); }
 };
 
@@ -1385,10 +1539,11 @@ class LLoadContextSlot: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = context;
   }
 
+  LOperand* context() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(LoadContextSlot, "load-context-slot")
   DECLARE_HYDROGEN_ACCESSOR(LoadContextSlot)
 
-  LOperand* context() { return InputAt(0); }
   int slot_index() { return hydrogen()->slot_index(); }
 
   virtual void PrintDataTo(StringStream* stream);
@@ -1402,11 +1557,12 @@ class LStoreContextSlot: public LTemplateInstruction<0, 2, 0> {
     inputs_[1] = value;
   }
 
+  LOperand* context() { return inputs_[0]; }
+  LOperand* value() { return inputs_[1]; }
+
   DECLARE_CONCRETE_INSTRUCTION(StoreContextSlot, "store-context-slot")
   DECLARE_HYDROGEN_ACCESSOR(StoreContextSlot)
 
-  LOperand* context() { return InputAt(0); }
-  LOperand* value() { return InputAt(1); }
   int slot_index() { return hydrogen()->slot_index(); }
 
   virtual void PrintDataTo(StringStream* stream);
@@ -1419,6 +1575,8 @@ class LPushArgument: public LTemplateInstruction<0, 1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(PushArgument, "push-argument")
 };
 
@@ -1455,9 +1613,9 @@ class LOuterContext: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = context;
   }
 
-  DECLARE_CONCRETE_INSTRUCTION(OuterContext, "outer-context")
+  LOperand* context() { return inputs_[0]; }
 
-  LOperand* context() { return InputAt(0); }
+  DECLARE_CONCRETE_INSTRUCTION(OuterContext, "outer-context")
 };
 
 
@@ -1476,7 +1634,7 @@ class LGlobalObject: public LTemplateInstruction<1, 1, 0> {
 
   DECLARE_CONCRETE_INSTRUCTION(GlobalObject, "global-object")
 
-  LOperand* context() { return InputAt(0); }
+  LOperand* context() { return inputs_[0]; }
 };
 
 
@@ -1486,9 +1644,9 @@ class LGlobalReceiver: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = global_object;
   }
 
-  DECLARE_CONCRETE_INSTRUCTION(GlobalReceiver, "global-receiver")
+  LOperand* global_object() { return inputs_[0]; }
 
-  LOperand* global() { return InputAt(0); }
+  DECLARE_CONCRETE_INSTRUCTION(GlobalReceiver, "global-receiver")
 };
 
 
@@ -1510,11 +1668,11 @@ class LInvokeFunction: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = function;
   }
 
+  LOperand* function() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(InvokeFunction, "invoke-function")
   DECLARE_HYDROGEN_ACCESSOR(InvokeFunction)
 
-  LOperand* function() { return inputs_[0]; }
-
   virtual void PrintDataTo(StringStream* stream);
 
   int arity() const { return hydrogen()->argument_count() - 1; }
@@ -1528,6 +1686,8 @@ class LCallKeyed: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = key;
   }
 
+  LOperand* key() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(CallKeyed, "call-keyed")
   DECLARE_HYDROGEN_ACCESSOR(CallKeyed)
 
@@ -1556,10 +1716,11 @@ class LCallFunction: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = function;
   }
 
+  LOperand* function() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(CallFunction, "call-function")
   DECLARE_HYDROGEN_ACCESSOR(CallFunction)
 
-  LOperand* function() { return inputs_[0]; }
   int arity() const { return hydrogen()->argument_count() - 1; }
 };
 
@@ -1594,6 +1755,8 @@ class LCallNew: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = constructor;
   }
 
+  LOperand* constructor() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(CallNew, "call-new")
   DECLARE_HYDROGEN_ACCESSOR(CallNew)
 
@@ -1619,6 +1782,8 @@ class LInteger32ToDouble: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(Integer32ToDouble, "int32-to-double")
 };
 
@@ -1629,6 +1794,8 @@ class LUint32ToDouble: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(Uint32ToDouble, "uint32-to-double")
 };
 
@@ -1639,6 +1806,8 @@ class LNumberTagI: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(NumberTagI, "number-tag-i")
 };
 
@@ -1649,18 +1818,24 @@ class LNumberTagU: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(NumberTagU, "number-tag-u")
 };
 
 
 class LNumberTagD: public LTemplateInstruction<1, 1, 2> {
  public:
-  LNumberTagD(LOperand* value, LOperand* temp1, LOperand* temp2) {
+  LNumberTagD(LOperand* value, LOperand* temp, LOperand* temp2) {
     inputs_[0] = value;
-    temps_[0] = temp1;
+    temps_[0] = temp;
     temps_[1] = temp2;
   }
 
+  LOperand* value() { return inputs_[0]; }
+  LOperand* temp() { return temps_[0]; }
+  LOperand* temp2() { return temps_[1]; }
+
   DECLARE_CONCRETE_INSTRUCTION(NumberTagD, "number-tag-d")
 };
 
@@ -1668,12 +1843,16 @@ class LNumberTagD: public LTemplateInstruction<1, 1, 2> {
 // Sometimes truncating conversion from a tagged value to an int32.
 class LDoubleToI: public LTemplateInstruction<1, 1, 2> {
  public:
-  LDoubleToI(LOperand* value, LOperand* temp1, LOperand* temp2) {
+  LDoubleToI(LOperand* value, LOperand* temp, LOperand* temp2) {
     inputs_[0] = value;
-    temps_[0] = temp1;
+    temps_[0] = temp;
     temps_[1] = temp2;
   }
 
+  LOperand* value() { return inputs_[0]; }
+  LOperand* temp() { return temps_[0]; }
+  LOperand* temp2() { return temps_[1]; }
+
   DECLARE_CONCRETE_INSTRUCTION(DoubleToI, "double-to-i")
   DECLARE_HYDROGEN_ACCESSOR(UnaryOperation)
 
@@ -1685,15 +1864,20 @@ class LDoubleToI: public LTemplateInstruction<1, 1, 2> {
 class LTaggedToI: public LTemplateInstruction<1, 1, 3> {
  public:
   LTaggedToI(LOperand* value,
-             LOperand* temp1,
+             LOperand* temp,
              LOperand* temp2,
              LOperand* temp3) {
     inputs_[0] = value;
-    temps_[0] = temp1;
+    temps_[0] = temp;
     temps_[1] = temp2;
     temps_[2] = temp3;
   }
 
+  LOperand* value() { return inputs_[0]; }
+  LOperand* temp() { return temps_[0]; }
+  LOperand* temp2() { return temps_[1]; }
+  LOperand* temp3() { return temps_[2]; }
+
   DECLARE_CONCRETE_INSTRUCTION(TaggedToI, "tagged-to-i")
   DECLARE_HYDROGEN_ACCESSOR(UnaryOperation)
 
@@ -1707,6 +1891,8 @@ class LSmiTag: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(SmiTag, "smi-tag")
 };
 
@@ -1717,6 +1903,8 @@ class LNumberUntagD: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(NumberUntagD, "double-untag")
   DECLARE_HYDROGEN_ACCESSOR(Change)
 };
@@ -1729,10 +1917,11 @@ class LSmiUntag: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = value;
   }
 
-  DECLARE_CONCRETE_INSTRUCTION(SmiUntag, "smi-untag")
-
+  LOperand* value() { return inputs_[0]; }
   bool needs_check() const { return needs_check_; }
 
+  DECLARE_CONCRETE_INSTRUCTION(SmiUntag, "smi-untag")
+
  private:
   bool needs_check_;
 };
@@ -1740,20 +1929,21 @@ class LSmiUntag: public LTemplateInstruction<1, 1, 0> {
 
 class LStoreNamedField: public LTemplateInstruction<0, 2, 1> {
  public:
-  LStoreNamedField(LOperand* obj, LOperand* val, LOperand* temp) {
-    inputs_[0] = obj;
-    inputs_[1] = val;
+  LStoreNamedField(LOperand* object, LOperand* value, LOperand* temp) {
+    inputs_[0] = object;
+    inputs_[1] = value;
     temps_[0] = temp;
   }
 
+  LOperand* object() { return inputs_[0]; }
+  LOperand* value() { return inputs_[1]; }
+  LOperand* temp() { return temps_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(StoreNamedField, "store-named-field")
   DECLARE_HYDROGEN_ACCESSOR(StoreNamedField)
 
   virtual void PrintDataTo(StringStream* stream);
 
-  LOperand* object() { return inputs_[0]; }
-  LOperand* value() { return inputs_[1]; }
-
   Handle<Object> name() const { return hydrogen()->name(); }
   bool is_in_object() { return hydrogen()->is_in_object(); }
   int offset() { return hydrogen()->offset(); }
@@ -1763,109 +1953,67 @@ class LStoreNamedField: public LTemplateInstruction<0, 2, 1> {
 
 class LStoreNamedGeneric: public LTemplateInstruction<0, 2, 0> {
  public:
-  LStoreNamedGeneric(LOperand* obj, LOperand* val) {
-    inputs_[0] = obj;
-    inputs_[1] = val;
+  LStoreNamedGeneric(LOperand* object, LOperand* value) {
+    inputs_[0] = object;
+    inputs_[1] = value;
   }
 
+  LOperand* object() { return inputs_[0]; }
+  LOperand* value() { return inputs_[1]; }
+
   DECLARE_CONCRETE_INSTRUCTION(StoreNamedGeneric, "store-named-generic")
   DECLARE_HYDROGEN_ACCESSOR(StoreNamedGeneric)
 
   virtual void PrintDataTo(StringStream* stream);
 
-  LOperand* object() { return inputs_[0]; }
-  LOperand* value() { return inputs_[1]; }
   Handle<Object> name() const { return hydrogen()->name(); }
   StrictModeFlag strict_mode_flag() { return hydrogen()->strict_mode_flag(); }
 };
 
 
-class LStoreKeyedFastElement: public LTemplateInstruction<0, 3, 0> {
+class LStoreKeyed: public LTemplateInstruction<0, 3, 0> {
  public:
-  LStoreKeyedFastElement(LOperand* obj, LOperand* key, LOperand* val) {
-    inputs_[0] = obj;
+  LStoreKeyed(LOperand* object, LOperand* key, LOperand* value) {
+    inputs_[0] = object;
     inputs_[1] = key;
-    inputs_[2] = val;
+    inputs_[2] = value;
   }
 
-  DECLARE_CONCRETE_INSTRUCTION(StoreKeyedFastElement,
-                               "store-keyed-fast-element")
-  DECLARE_HYDROGEN_ACCESSOR(StoreKeyedFastElement)
-
-  virtual void PrintDataTo(StringStream* stream);
-
-  LOperand* object() { return inputs_[0]; }
+  bool is_external() const { return hydrogen()->is_external(); }
+  LOperand* elements() { return inputs_[0]; }
   LOperand* key() { return inputs_[1]; }
   LOperand* value() { return inputs_[2]; }
-  uint32_t additional_index() const { return hydrogen()->index_offset(); }
-};
-
-
-class LStoreKeyedFastDoubleElement: public LTemplateInstruction<0, 3, 0> {
- public:
-  LStoreKeyedFastDoubleElement(LOperand* elements,
-                               LOperand* key,
-                               LOperand* val) {
-    inputs_[0] = elements;
-    inputs_[1] = key;
-    inputs_[2] = val;
+  ElementsKind elements_kind() const {
+    return hydrogen()->elements_kind();
   }
 
-  DECLARE_CONCRETE_INSTRUCTION(StoreKeyedFastDoubleElement,
-                               "store-keyed-fast-double-element")
-  DECLARE_HYDROGEN_ACCESSOR(StoreKeyedFastDoubleElement)
+  DECLARE_CONCRETE_INSTRUCTION(StoreKeyed, "store-keyed")
+  DECLARE_HYDROGEN_ACCESSOR(StoreKeyed)
 
   virtual void PrintDataTo(StringStream* stream);
-
-  LOperand* elements() { return inputs_[0]; }
-  LOperand* key() { return inputs_[1]; }
-  LOperand* value() { return inputs_[2]; }
-  uint32_t additional_index() const { return hydrogen()->index_offset(); }
-
   bool NeedsCanonicalization() { return hydrogen()->NeedsCanonicalization(); }
+  uint32_t additional_index() const { return hydrogen()->index_offset(); }
 };
 
 
 class LStoreKeyedGeneric: public LTemplateInstruction<0, 3, 0> {
  public:
-  LStoreKeyedGeneric(LOperand* obj, LOperand* key, LOperand* val) {
+  LStoreKeyedGeneric(LOperand* obj, LOperand* key, LOperand* value) {
     inputs_[0] = obj;
     inputs_[1] = key;
-    inputs_[2] = val;
+    inputs_[2] = value;
   }
 
-  DECLARE_CONCRETE_INSTRUCTION(StoreKeyedGeneric, "store-keyed-generic")
-  DECLARE_HYDROGEN_ACCESSOR(StoreKeyedGeneric)
-
-  virtual void PrintDataTo(StringStream* stream);
-
   LOperand* object() { return inputs_[0]; }
   LOperand* key() { return inputs_[1]; }
   LOperand* value() { return inputs_[2]; }
-  StrictModeFlag strict_mode_flag() { return hydrogen()->strict_mode_flag(); }
-};
 
-class LStoreKeyedSpecializedArrayElement: public LTemplateInstruction<0, 3, 0> {
- public:
-  LStoreKeyedSpecializedArrayElement(LOperand* external_pointer,
-                                     LOperand* key,
-                                     LOperand* val) {
-    inputs_[0] = external_pointer;
-    inputs_[1] = key;
-    inputs_[2] = val;
-  }
+  DECLARE_CONCRETE_INSTRUCTION(StoreKeyedGeneric, "store-keyed-generic")
+  DECLARE_HYDROGEN_ACCESSOR(StoreKeyedGeneric)
 
-  DECLARE_CONCRETE_INSTRUCTION(StoreKeyedSpecializedArrayElement,
-                               "store-keyed-specialized-array-element")
-  DECLARE_HYDROGEN_ACCESSOR(StoreKeyedSpecializedArrayElement)
+  virtual void PrintDataTo(StringStream* stream);
 
-  LOperand* external_pointer() { return inputs_[0]; }
-  LOperand* key() { return inputs_[1]; }
-  LOperand* value() { return inputs_[2]; }
-  ElementsKind elements_kind() const {
-    return hydrogen()->elements_kind();
-  }
-  uint32_t additional_index() const { return hydrogen()->index_offset(); }
+  StrictModeFlag strict_mode_flag() { return hydrogen()->strict_mode_flag(); }
 };
 
 
@@ -1873,21 +2021,22 @@ class LTransitionElementsKind: public LTemplateInstruction<1, 1, 2> {
  public:
   LTransitionElementsKind(LOperand* object,
                           LOperand* new_map_temp,
-                          LOperand* temp_reg) {
+                          LOperand* temp) {
     inputs_[0] = object;
     temps_[0] = new_map_temp;
-    temps_[1] = temp_reg;
+    temps_[1] = temp;
   }
 
+  LOperand* object() { return inputs_[0]; }
+  LOperand* new_map_temp() { return temps_[0]; }
+  LOperand* temp() { return temps_[1]; }
+
   DECLARE_CONCRETE_INSTRUCTION(TransitionElementsKind,
                                "transition-elements-kind")
   DECLARE_HYDROGEN_ACCESSOR(TransitionElementsKind)
 
   virtual void PrintDataTo(StringStream* stream);
 
-  LOperand* object() { return inputs_[0]; }
-  LOperand* new_map_reg() { return temps_[0]; }
-  LOperand* temp_reg() { return temps_[1]; }
   Handle<Map> original_map() { return hydrogen()->original_map(); }
   Handle<Map> transitioned_map() { return hydrogen()->transitioned_map(); }
 };
@@ -1900,11 +2049,11 @@ class LStringAdd: public LTemplateInstruction<1, 2, 0> {
     inputs_[1] = right;
   }
 
-  DECLARE_CONCRETE_INSTRUCTION(StringAdd, "string-add")
-  DECLARE_HYDROGEN_ACCESSOR(StringAdd)
-
   LOperand* left() { return inputs_[0]; }
   LOperand* right() { return inputs_[1]; }
+
+  DECLARE_CONCRETE_INSTRUCTION(StringAdd, "string-add")
+  DECLARE_HYDROGEN_ACCESSOR(StringAdd)
 };
 
 
@@ -1916,11 +2065,11 @@ class LStringCharCodeAt: public LTemplateInstruction<1, 2, 0> {
     inputs_[1] = index;
   }
 
-  DECLARE_CONCRETE_INSTRUCTION(StringCharCodeAt, "string-char-code-at")
-  DECLARE_HYDROGEN_ACCESSOR(StringCharCodeAt)
-
   LOperand* string() { return inputs_[0]; }
   LOperand* index() { return inputs_[1]; }
+
+  DECLARE_CONCRETE_INSTRUCTION(StringCharCodeAt, "string-char-code-at")
+  DECLARE_HYDROGEN_ACCESSOR(StringCharCodeAt)
 };
 
 
@@ -1930,10 +2079,10 @@ class LStringCharFromCode: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = char_code;
   }
 
+  LOperand* char_code() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(StringCharFromCode, "string-char-from-code")
   DECLARE_HYDROGEN_ACCESSOR(StringCharFromCode)
-
-  LOperand* char_code() { return inputs_[0]; }
 };
 
 
@@ -1943,10 +2092,10 @@ class LStringLength: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = string;
   }
 
+  LOperand* string() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(StringLength, "string-length")
   DECLARE_HYDROGEN_ACCESSOR(StringLength)
-
-  LOperand* string() { return inputs_[0]; }
 };
 
 
@@ -1956,7 +2105,7 @@ class LCheckFunction: public LTemplateInstruction<0, 1, 0> {
     inputs_[0] = value;
   }
 
-  LOperand* value() { return InputAt(0); }
+  LOperand* value() { return inputs_[0]; }
 
   DECLARE_CONCRETE_INSTRUCTION(CheckFunction, "check-function")
   DECLARE_HYDROGEN_ACCESSOR(CheckFunction)
@@ -1969,6 +2118,8 @@ class LCheckInstanceType: public LTemplateInstruction<0, 1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(CheckInstanceType, "check-instance-type")
   DECLARE_HYDROGEN_ACCESSOR(CheckInstanceType)
 };
@@ -1980,18 +2131,23 @@ class LCheckMaps: public LTemplateInstruction<0, 1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(CheckMaps, "check-maps")
   DECLARE_HYDROGEN_ACCESSOR(CheckMaps)
 };
 
 
-class LCheckPrototypeMaps: public LTemplateInstruction<0, 0, 2> {
+class LCheckPrototypeMaps: public LTemplateInstruction<1, 0, 2> {
  public:
-  LCheckPrototypeMaps(LOperand* temp1, LOperand* temp2)  {
-    temps_[0] = temp1;
+  LCheckPrototypeMaps(LOperand* temp, LOperand* temp2)  {
+    temps_[0] = temp;
     temps_[1] = temp2;
   }
 
+  LOperand* temp() { return temps_[0]; }
+  LOperand* temp2() { return temps_[1]; }
+
   DECLARE_CONCRETE_INSTRUCTION(CheckPrototypeMaps, "check-prototype-maps")
   DECLARE_HYDROGEN_ACCESSOR(CheckPrototypeMaps)
 
@@ -2006,6 +2162,8 @@ class LCheckSmi: public LTemplateInstruction<0, 1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(CheckSmi, "check-smi")
 };
 
@@ -2016,18 +2174,21 @@ class LCheckNonSmi: public LTemplateInstruction<0, 1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(CheckNonSmi, "check-non-smi")
 };
 
 
 class LClampDToUint8: public LTemplateInstruction<1, 1, 1> {
  public:
-  LClampDToUint8(LOperand* value, LOperand* temp) {
-    inputs_[0] = value;
+  LClampDToUint8(LOperand* unclamped, LOperand* temp) {
+    inputs_[0] = unclamped;
     temps_[0] = temp;
   }
 
   LOperand* unclamped() { return inputs_[0]; }
+  LOperand* temp() { return temps_[0]; }
 
   DECLARE_CONCRETE_INSTRUCTION(ClampDToUint8, "clamp-d-to-uint8")
 };
@@ -2035,8 +2196,8 @@ class LClampDToUint8: public LTemplateInstruction<1, 1, 1> {
 
 class LClampIToUint8: public LTemplateInstruction<1, 1, 0> {
  public:
-  explicit LClampIToUint8(LOperand* value) {
-    inputs_[0] = value;
+  explicit LClampIToUint8(LOperand* unclamped) {
+    inputs_[0] = unclamped;
   }
 
   LOperand* unclamped() { return inputs_[0]; }
@@ -2047,12 +2208,13 @@ class LClampIToUint8: public LTemplateInstruction<1, 1, 0> {
 
 class LClampTToUint8: public LTemplateInstruction<1, 1, 1> {
  public:
-  LClampTToUint8(LOperand* value, LOperand* temp) {
-    inputs_[0] = value;
+  LClampTToUint8(LOperand* unclamped, LOperand* temp) {
+    inputs_[0] = unclamped;
     temps_[0] = temp;
   }
 
   LOperand* unclamped() { return inputs_[0]; }
+  LOperand* temp() { return temps_[0]; }
 
   DECLARE_CONCRETE_INSTRUCTION(ClampTToUint8, "clamp-t-to-uint8")
 };
@@ -2060,11 +2222,14 @@ class LClampTToUint8: public LTemplateInstruction<1, 1, 1> {
 
 class LAllocateObject: public LTemplateInstruction<1, 0, 2> {
  public:
-  LAllocateObject(LOperand* temp1, LOperand* temp2) {
-    temps_[0] = temp1;
+  LAllocateObject(LOperand* temp, LOperand* temp2) {
+    temps_[0] = temp;
     temps_[1] = temp2;
   }
 
+  LOperand* temp() { return temps_[0]; }
+  LOperand* temp2() { return temps_[1]; }
+
   DECLARE_CONCRETE_INSTRUCTION(AllocateObject, "allocate-object")
   DECLARE_HYDROGEN_ACCESSOR(AllocateObject)
 };
@@ -2113,6 +2278,8 @@ class LToFastProperties: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(ToFastProperties, "to-fast-properties")
   DECLARE_HYDROGEN_ACCESSOR(ToFastProperties)
 };
@@ -2124,6 +2291,8 @@ class LTypeof: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(Typeof, "typeof")
 };
 
@@ -2134,6 +2303,8 @@ class LTypeofIsAndBranch: public LControlInstruction<1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(TypeofIsAndBranch, "typeof-is-and-branch")
   DECLARE_HYDROGEN_ACCESSOR(TypeofIsAndBranch)
 
@@ -2149,6 +2320,8 @@ class LIsConstructCallAndBranch: public LControlInstruction<0, 1> {
     temps_[0] = temp;
   }
 
+  LOperand* temp() { return temps_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(IsConstructCallAndBranch,
                                "is-construct-call-and-branch")
 };
@@ -2156,15 +2329,15 @@ class LIsConstructCallAndBranch: public LControlInstruction<0, 1> {
 
 class LDeleteProperty: public LTemplateInstruction<1, 2, 0> {
  public:
-  LDeleteProperty(LOperand* obj, LOperand* key) {
-    inputs_[0] = obj;
+  LDeleteProperty(LOperand* object, LOperand* key) {
+    inputs_[0] = object;
     inputs_[1] = key;
   }
 
-  DECLARE_CONCRETE_INSTRUCTION(DeleteProperty, "delete-property")
-
   LOperand* object() { return inputs_[0]; }
   LOperand* key() { return inputs_[1]; }
+
+  DECLARE_CONCRETE_INSTRUCTION(DeleteProperty, "delete-property")
 };
 
 
@@ -2229,15 +2402,13 @@ class LForInPrepareMap: public LTemplateInstruction<1, 1, 0> {
 };
 
 
-class LForInCacheArray: public LTemplateInstruction<1, 1, 1> {
+class LForInCacheArray: public LTemplateInstruction<1, 1, 0> {
  public:
-  explicit LForInCacheArray(LOperand* map, LOperand* scratch) {
+  explicit LForInCacheArray(LOperand* map) {
     inputs_[0] = map;
-    temps_[0] = scratch;
   }
 
   LOperand* map() { return inputs_[0]; }
-  LOperand* scratch() { return temps_[0]; }
 
   DECLARE_CONCRETE_INSTRUCTION(ForInCacheArray, "for-in-cache-array")
 
@@ -2311,6 +2482,9 @@ class LChunkBuilder BASE_EMBEDDED {
   HYDROGEN_CONCRETE_INSTRUCTION_LIST(DECLARE_DO)
 #undef DECLARE_DO
 
+  LInstruction* DoMultiplyAdd(HMul* mul, HValue* addend);
+  LInstruction* DoRSub(HSub* instr);
+
   static bool HasMagicNumberForDivisor(int32_t divisor);
   static HValue* SimplifiedDividendForMathFloorOfDiv(HValue* val);
   static HValue* SimplifiedDivisorForMathFloorOfDiv(HValue* val);
diff --git a/deps/v8/src/arm/lithium-codegen-arm.cc b/deps/v8/src/arm/lithium-codegen-arm.cc
index e9ba5eec72..06b021669b 100644
--- a/deps/v8/src/arm/lithium-codegen-arm.cc
+++ b/deps/v8/src/arm/lithium-codegen-arm.cc
@@ -146,8 +146,20 @@ bool LCodeGen::GeneratePrologue() {
     __ bind(&ok);
   }
 
-  __ stm(db_w, sp, r1.bit() | cp.bit() | fp.bit() | lr.bit());
-  __ add(fp, sp, Operand(2 * kPointerSize));  // Adjust FP to point to saved FP.
+
+  info()->set_prologue_offset(masm_->pc_offset());
+  {
+    PredictableCodeSizeScope predictible_code_size_scope(
+        masm_, kNoCodeAgeSequenceLength * Assembler::kInstrSize);
+    // The following three instructions must remain together and unmodified
+    // for code aging to work properly.
+    __ stm(db_w, sp, r1.bit() | cp.bit() | fp.bit() | lr.bit());
+    // Load undefined value here, so the value is ready for the loop
+    // below.
+    __ LoadRoot(ip, Heap::kUndefinedValueRootIndex);
+    // Adjust FP to point to saved FP.
+    __ add(fp, sp, Operand(2 * kPointerSize));
+  }
 
   // Reserve space for the stack slots needed by the code.
   int slots = GetStackSlotCount();
@@ -222,7 +234,30 @@ bool LCodeGen::GenerateBody() {
     }
 
     if (emit_instructions) {
-      Comment(";;; @%d: %s.", current_instruction_, instr->Mnemonic());
+      if (FLAG_code_comments) {
+        HValue* hydrogen = instr->hydrogen_value();
+        if (hydrogen != NULL) {
+          if (hydrogen->IsChange()) {
+            HValue* changed_value = HChange::cast(hydrogen)->value();
+            int use_id = 0;
+            const char* use_mnemo = "dead";
+            if (hydrogen->UseCount() >= 1) {
+              HValue* use_value = hydrogen->uses().value();
+              use_id = use_value->id();
+              use_mnemo = use_value->Mnemonic();
+            }
+            Comment(";;; @%d: %s. <of #%d %s for #%d %s>",
+                    current_instruction_, instr->Mnemonic(),
+                    changed_value->id(), changed_value->Mnemonic(),
+                    use_id, use_mnemo);
+          } else {
+            Comment(";;; @%d: %s. <#%d>", current_instruction_,
+                    instr->Mnemonic(), hydrogen->id());
+          }
+        } else {
+          Comment(";;; @%d: %s.", current_instruction_, instr->Mnemonic());
+        }
+      }
       instr->CompileToNative(this);
     }
   }
@@ -464,7 +499,9 @@ MemOperand LCodeGen::ToHighMemOperand(LOperand* op) const {
 
 
 void LCodeGen::WriteTranslation(LEnvironment* environment,
-                                Translation* translation) {
+                                Translation* translation,
+                                int* arguments_index,
+                                int* arguments_count) {
   if (environment == NULL) return;
 
   // The translation includes one command per value in the environment.
@@ -472,7 +509,17 @@ void LCodeGen::WriteTranslation(LEnvironment* environment,
   // The output frame height does not include the parameters.
   int height = translation_size - environment->parameter_count();
 
-  WriteTranslation(environment->outer(), translation);
+  // Function parameters are arguments to the outermost environment. The
+  // arguments index points to the first element of a sequence of tagged
+  // values on the stack that represent the arguments. This needs to be
+  // kept in sync with the LArgumentsElements implementation.
+  *arguments_index = -environment->parameter_count();
+  *arguments_count = environment->parameter_count();
+
+  WriteTranslation(environment->outer(),
+                   translation,
+                   arguments_index,
+                   arguments_count);
   int closure_id = *info()->closure() != *environment->closure()
       ? DefineDeoptimizationLiteral(environment->closure())
       : Translation::kSelfLiteralId;
@@ -498,6 +545,17 @@ void LCodeGen::WriteTranslation(LEnvironment* environment,
       translation->BeginArgumentsAdaptorFrame(closure_id, translation_size);
       break;
   }
+
+  // Inlined frames which push their arguments cause the index to be
+  // bumped and a new stack area to be used for materialization.
+  if (environment->entry() != NULL &&
+      environment->entry()->arguments_pushed()) {
+    *arguments_index = *arguments_index < 0
+        ? GetStackSlotCount()
+        : *arguments_index + *arguments_count;
+    *arguments_count = environment->entry()->arguments_count() + 1;
+  }
+
   for (int i = 0; i < translation_size; ++i) {
     LOperand* value = environment->values()->at(i);
     // spilled_registers_ and spilled_double_registers_ are either
@@ -509,7 +567,9 @@ void LCodeGen::WriteTranslation(LEnvironment* environment,
         AddToTranslation(translation,
                          environment->spilled_registers()[value->index()],
                          environment->HasTaggedValueAt(i),
-                         environment->HasUint32ValueAt(i));
+                         environment->HasUint32ValueAt(i),
+                         *arguments_index,
+                         *arguments_count);
       } else if (
           value->IsDoubleRegister() &&
           environment->spilled_double_registers()[value->index()] != NULL) {
@@ -518,14 +578,18 @@ void LCodeGen::WriteTranslation(LEnvironment* environment,
             translation,
             environment->spilled_double_registers()[value->index()],
             false,
-            false);
+            false,
+            *arguments_index,
+            *arguments_count);
       }
     }
 
     AddToTranslation(translation,
                      value,
                      environment->HasTaggedValueAt(i),
-                     environment->HasUint32ValueAt(i));
+                     environment->HasUint32ValueAt(i),
+                     *arguments_index,
+                     *arguments_count);
   }
 }
 
@@ -533,12 +597,14 @@ void LCodeGen::WriteTranslation(LEnvironment* environment,
 void LCodeGen::AddToTranslation(Translation* translation,
                                 LOperand* op,
                                 bool is_tagged,
-                                bool is_uint32) {
+                                bool is_uint32,
+                                int arguments_index,
+                                int arguments_count) {
   if (op == NULL) {
     // TODO(twuerthinger): Introduce marker operands to indicate that this value
     // is not present and must be reconstructed from the deoptimizer. Currently
     // this is only used for the arguments object.
-    translation->StoreArgumentsObject();
+    translation->StoreArgumentsObject(arguments_index, arguments_count);
   } else if (op->IsStackSlot()) {
     if (is_tagged) {
       translation->StoreStackSlot(op->index());
@@ -577,22 +643,24 @@ void LCodeGen::AddToTranslation(Translation* translation,
 
 void LCodeGen::CallCode(Handle<Code> code,
                         RelocInfo::Mode mode,
-                        LInstruction* instr) {
-  CallCodeGeneric(code, mode, instr, RECORD_SIMPLE_SAFEPOINT);
+                        LInstruction* instr,
+                        TargetAddressStorageMode storage_mode) {
+  CallCodeGeneric(code, mode, instr, RECORD_SIMPLE_SAFEPOINT, storage_mode);
 }
 
 
 void LCodeGen::CallCodeGeneric(Handle<Code> code,
                                RelocInfo::Mode mode,
                                LInstruction* instr,
-                               SafepointMode safepoint_mode) {
+                               SafepointMode safepoint_mode,
+                               TargetAddressStorageMode storage_mode) {
   ASSERT(instr != NULL);
   // Block literal pool emission to ensure nop indicating no inlined smi code
   // is in the correct position.
   Assembler::BlockConstPoolScope block_const_pool(masm());
   LPointerMap* pointers = instr->pointer_map();
   RecordPosition(pointers->position());
-  __ Call(code, mode);
+  __ Call(code, mode, TypeFeedbackId::None(), al, storage_mode);
   RecordSafepointWithLazyDeopt(instr, safepoint_mode);
 
   // Signal that we don't inline smi code before these stubs in the
@@ -644,15 +712,16 @@ void LCodeGen::RegisterEnvironmentForDeoptimization(LEnvironment* environment,
 
     int frame_count = 0;
     int jsframe_count = 0;
+    int args_index = 0;
+    int args_count = 0;
     for (LEnvironment* e = environment; e != NULL; e = e->outer()) {
       ++frame_count;
       if (e->frame_type() == JS_FUNCTION) {
         ++jsframe_count;
       }
     }
-    Translation translation(&translations_, frame_count, jsframe_count,
-                            zone());
-    WriteTranslation(environment, &translation);
+    Translation translation(&translations_, frame_count, jsframe_count, zone());
+    WriteTranslation(environment, &translation, &args_index, &args_count);
     int deoptimization_index = deoptimizations_.length();
     int pc_offset = masm()->pc_offset();
     environment->Register(deoptimization_index,
@@ -919,7 +988,7 @@ void LCodeGen::DoUnknownOSRValue(LUnknownOSRValue* instr) {
 
 void LCodeGen::DoModI(LModI* instr) {
   if (instr->hydrogen()->HasPowerOf2Divisor()) {
-    Register dividend = ToRegister(instr->InputAt(0));
+    Register dividend = ToRegister(instr->left());
     Register result = ToRegister(instr->result());
 
     int32_t divisor =
@@ -944,112 +1013,135 @@ void LCodeGen::DoModI(LModI* instr) {
   }
 
   // These registers hold untagged 32 bit values.
-  Register left = ToRegister(instr->InputAt(0));
-  Register right = ToRegister(instr->InputAt(1));
+  Register left = ToRegister(instr->left());
+  Register right = ToRegister(instr->right());
   Register result = ToRegister(instr->result());
+  Label done;
 
-  Register scratch = scratch0();
-  Register scratch2 = ToRegister(instr->TempAt(0));
-  DwVfpRegister dividend = ToDoubleRegister(instr->TempAt(1));
-  DwVfpRegister divisor = ToDoubleRegister(instr->TempAt(2));
-  DwVfpRegister quotient = double_scratch0();
-
-  ASSERT(!dividend.is(divisor));
-  ASSERT(!dividend.is(quotient));
-  ASSERT(!divisor.is(quotient));
-  ASSERT(!scratch.is(left));
-  ASSERT(!scratch.is(right));
-  ASSERT(!scratch.is(result));
+  if (CpuFeatures::IsSupported(SUDIV)) {
+    CpuFeatures::Scope scope(SUDIV);
+    // Check for x % 0.
+    if (instr->hydrogen()->CheckFlag(HValue::kCanBeDivByZero)) {
+      __ cmp(right, Operand(0));
+      DeoptimizeIf(eq, instr->environment());
+    }
 
-  Label done, vfp_modulo, both_positive, right_negative;
+    // For  r3 = r1 % r2; we can have the following ARM code
+    // sdiv r3, r1, r2
+    // mls r3, r3, r2, r1
 
-  // Check for x % 0.
-  if (instr->hydrogen()->CheckFlag(HValue::kCanBeDivByZero)) {
-    __ cmp(right, Operand(0));
-    DeoptimizeIf(eq, instr->environment());
-  }
+    __ sdiv(result, left, right);
+    __ mls(result, result, right, left);
+    __ cmp(result, Operand(0));
+    __ b(ne, &done);
 
-  __ Move(result, left);
+    if (instr->hydrogen()->CheckFlag(HValue::kBailoutOnMinusZero)) {
+       __ cmp(left, Operand(0));
+       DeoptimizeIf(lt, instr->environment());
+    }
+  } else {
+    Register scratch = scratch0();
+    Register scratch2 = ToRegister(instr->temp());
+    DwVfpRegister dividend = ToDoubleRegister(instr->temp2());
+    DwVfpRegister divisor = ToDoubleRegister(instr->temp3());
+    DwVfpRegister quotient = double_scratch0();
+
+    ASSERT(!dividend.is(divisor));
+    ASSERT(!dividend.is(quotient));
+    ASSERT(!divisor.is(quotient));
+    ASSERT(!scratch.is(left));
+    ASSERT(!scratch.is(right));
+    ASSERT(!scratch.is(result));
+
+    Label vfp_modulo, both_positive, right_negative;
+
+    // Check for x % 0.
+    if (instr->hydrogen()->CheckFlag(HValue::kCanBeDivByZero)) {
+      __ cmp(right, Operand(0));
+      DeoptimizeIf(eq, instr->environment());
+    }
 
-  // (0 % x) must yield 0 (if x is finite, which is the case here).
-  __ cmp(left, Operand(0));
-  __ b(eq, &done);
-  // Preload right in a vfp register.
-  __ vmov(divisor.low(), right);
-  __ b(lt, &vfp_modulo);
+    __ Move(result, left);
 
-  __ cmp(left, Operand(right));
-  __ b(lt, &done);
-
-  // Check for (positive) power of two on the right hand side.
-  __ JumpIfNotPowerOfTwoOrZeroAndNeg(right,
-                                     scratch,
-                                     &right_negative,
-                                     &both_positive);
-  // Perform modulo operation (scratch contains right - 1).
-  __ and_(result, scratch, Operand(left));
-  __ b(&done);
+    // (0 % x) must yield 0 (if x is finite, which is the case here).
+    __ cmp(left, Operand(0));
+    __ b(eq, &done);
+    // Preload right in a vfp register.
+    __ vmov(divisor.low(), right);
+    __ b(lt, &vfp_modulo);
 
-  __ bind(&right_negative);
-  // Negate right. The sign of the divisor does not matter.
-  __ rsb(right, right, Operand(0));
-
-  __ bind(&both_positive);
-  const int kUnfolds = 3;
-  // If the right hand side is smaller than the (nonnegative)
-  // left hand side, the left hand side is the result.
-  // Else try a few subtractions of the left hand side.
-  __ mov(scratch, left);
-  for (int i = 0; i < kUnfolds; i++) {
-    // Check if the left hand side is less or equal than the
-    // the right hand side.
-    __ cmp(scratch, Operand(right));
-    __ mov(result, scratch, LeaveCC, lt);
+    __ cmp(left, Operand(right));
     __ b(lt, &done);
-    // If not, reduce the left hand side by the right hand
-    // side and check again.
-    if (i < kUnfolds - 1) __ sub(scratch, scratch, right);
-  }
-
-  __ bind(&vfp_modulo);
-  // Load the arguments in VFP registers.
-  // The divisor value is preloaded before. Be careful that 'right' is only live
-  // on entry.
-  __ vmov(dividend.low(), left);
-  // From here on don't use right as it may have been reallocated (for example
-  // to scratch2).
-  right = no_reg;
-
-  __ vcvt_f64_s32(dividend, dividend.low());
-  __ vcvt_f64_s32(divisor, divisor.low());
-
-  // We do not care about the sign of the divisor.
-  __ vabs(divisor, divisor);
-  // Compute the quotient and round it to a 32bit integer.
-  __ vdiv(quotient, dividend, divisor);
-  __ vcvt_s32_f64(quotient.low(), quotient);
-  __ vcvt_f64_s32(quotient, quotient.low());
-
-  // Compute the remainder in result.
-  DwVfpRegister double_scratch = dividend;
-  __ vmul(double_scratch, divisor, quotient);
-  __ vcvt_s32_f64(double_scratch.low(), double_scratch);
-  __ vmov(scratch, double_scratch.low());
-
-  if (!instr->hydrogen()->CheckFlag(HValue::kBailoutOnMinusZero)) {
-    __ sub(result, left, scratch);
-  } else {
-    Label ok;
-    // Check for -0.
-    __ sub(scratch2, left, scratch, SetCC);
-    __ b(ne, &ok);
-    __ cmp(left, Operand(0));
-    DeoptimizeIf(mi, instr->environment());
-    __ bind(&ok);
-    // Load the result and we are done.
-    __ mov(result, scratch2);
-  }
 
+    // Check for (positive) power of two on the right hand side.
+    __ JumpIfNotPowerOfTwoOrZeroAndNeg(right,
+                                       scratch,
+                                       &right_negative,
+                                       &both_positive);
+    // Perform modulo operation (scratch contains right - 1).
+    __ and_(result, scratch, Operand(left));
+    __ b(&done);
+
+    __ bind(&right_negative);
+    // Negate right. The sign of the divisor does not matter.
+    __ rsb(right, right, Operand(0));
+
+    __ bind(&both_positive);
+    const int kUnfolds = 3;
+    // If the right hand side is smaller than the (nonnegative)
+    // left hand side, the left hand side is the result.
+    // Else try a few subtractions of the left hand side.
+    __ mov(scratch, left);
+    for (int i = 0; i < kUnfolds; i++) {
+      // Check if the left hand side is less or equal than the
+      // the right hand side.
+      __ cmp(scratch, Operand(right));
+      __ mov(result, scratch, LeaveCC, lt);
+      __ b(lt, &done);
+      // If not, reduce the left hand side by the right hand
+      // side and check again.
+      if (i < kUnfolds - 1) __ sub(scratch, scratch, right);
+    }
+
+    __ bind(&vfp_modulo);
+    // Load the arguments in VFP registers.
+    // The divisor value is preloaded before. Be careful that 'right'
+    // is only live on entry.
+    __ vmov(dividend.low(), left);
+    // From here on don't use right as it may have been reallocated
+    // (for example to scratch2).
+    right = no_reg;
+
+    __ vcvt_f64_s32(dividend, dividend.low());
+    __ vcvt_f64_s32(divisor, divisor.low());
+
+    // We do not care about the sign of the divisor.
+    __ vabs(divisor, divisor);
+    // Compute the quotient and round it to a 32bit integer.
+    __ vdiv(quotient, dividend, divisor);
+    __ vcvt_s32_f64(quotient.low(), quotient);
+    __ vcvt_f64_s32(quotient, quotient.low());
+
+    // Compute the remainder in result.
+    DwVfpRegister double_scratch = dividend;
+    __ vmul(double_scratch, divisor, quotient);
+    __ vcvt_s32_f64(double_scratch.low(), double_scratch);
+    __ vmov(scratch, double_scratch.low());
+
+    if (!instr->hydrogen()->CheckFlag(HValue::kBailoutOnMinusZero)) {
+      __ sub(result, left, scratch);
+    } else {
+      Label ok;
+      // Check for -0.
+      __ sub(scratch2, left, scratch, SetCC);
+      __ b(ne, &ok);
+      __ cmp(left, Operand(0));
+      DeoptimizeIf(mi, instr->environment());
+      __ bind(&ok);
+      // Load the result and we are done.
+      __ mov(result, scratch2);
+    }
+  }
   __ bind(&done);
 }
 
@@ -1154,15 +1246,18 @@ void LCodeGen::DoDivI(LDivI* instr) {
     DeferredDivI(LCodeGen* codegen, LDivI* instr)
         : LDeferredCode(codegen), instr_(instr) { }
     virtual void Generate() {
-      codegen()->DoDeferredBinaryOpStub(instr_, Token::DIV);
+      codegen()->DoDeferredBinaryOpStub(instr_->pointer_map(),
+                                        instr_->left(),
+                                        instr_->right(),
+                                        Token::DIV);
     }
     virtual LInstruction* instr() { return instr_; }
    private:
     LDivI* instr_;
   };
 
-  const Register left = ToRegister(instr->InputAt(0));
-  const Register right = ToRegister(instr->InputAt(1));
+  const Register left = ToRegister(instr->left());
+  const Register right = ToRegister(instr->right());
   const Register scratch = scratch0();
   const Register result = ToRegister(instr->result());
 
@@ -1229,17 +1324,29 @@ void LCodeGen::DoDivI(LDivI* instr) {
 }
 
 
+void LCodeGen::DoMultiplyAddD(LMultiplyAddD* instr) {
+  DwVfpRegister addend = ToDoubleRegister(instr->addend());
+  DwVfpRegister multiplier = ToDoubleRegister(instr->multiplier());
+  DwVfpRegister multiplicand = ToDoubleRegister(instr->multiplicand());
+
+  // This is computed in-place.
+  ASSERT(addend.is(ToDoubleRegister(instr->result())));
+
+  __ vmla(addend, multiplier, multiplicand);
+}
+
+
 void LCodeGen::DoMathFloorOfDiv(LMathFloorOfDiv* instr) {
   const Register result = ToRegister(instr->result());
-  const Register left = ToRegister(instr->InputAt(0));
-  const Register remainder = ToRegister(instr->TempAt(0));
+  const Register left = ToRegister(instr->left());
+  const Register remainder = ToRegister(instr->temp());
   const Register scratch = scratch0();
 
   // We only optimize this for division by constants, because the standard
   // integer division routine is usually slower than transitionning to VFP.
   // This could be optimized on processors with SDIV available.
-  ASSERT(instr->InputAt(1)->IsConstantOperand());
-  int32_t divisor = ToInteger32(LConstantOperand::cast(instr->InputAt(1)));
+  ASSERT(instr->right()->IsConstantOperand());
+  int32_t divisor = ToInteger32(LConstantOperand::cast(instr->right()));
   if (divisor < 0) {
     __ cmp(left, Operand(0));
     DeoptimizeIf(eq, instr->environment());
@@ -1257,11 +1364,12 @@ void LCodeGen::DoMathFloorOfDiv(LMathFloorOfDiv* instr) {
 }
 
 
-template<int T>
-void LCodeGen::DoDeferredBinaryOpStub(LTemplateInstruction<1, 2, T>* instr,
+void LCodeGen::DoDeferredBinaryOpStub(LPointerMap* pointer_map,
+                                      LOperand* left_argument,
+                                      LOperand* right_argument,
                                       Token::Value op) {
-  Register left = ToRegister(instr->InputAt(0));
-  Register right = ToRegister(instr->InputAt(1));
+  Register left = ToRegister(left_argument);
+  Register right = ToRegister(right_argument);
 
   PushSafepointRegistersScope scope(this, Safepoint::kWithRegistersAndDoubles);
   // Move left to r1 and right to r0 for the stub call.
@@ -1280,7 +1388,7 @@ void LCodeGen::DoDeferredBinaryOpStub(LTemplateInstruction<1, 2, T>* instr,
   }
   BinaryOpStub stub(op, OVERWRITE_LEFT);
   __ CallStub(&stub);
-  RecordSafepointWithRegistersAndDoubles(instr->pointer_map(),
+  RecordSafepointWithRegistersAndDoubles(pointer_map,
                                          0,
                                          Safepoint::kNoLazyDeopt);
   // Overwrite the stored value of r0 with the result of the stub.
@@ -1292,8 +1400,8 @@ void LCodeGen::DoMulI(LMulI* instr) {
   Register scratch = scratch0();
   Register result = ToRegister(instr->result());
   // Note that result may alias left.
-  Register left = ToRegister(instr->InputAt(0));
-  LOperand* right_op = instr->InputAt(1);
+  Register left = ToRegister(instr->left());
+  LOperand* right_op = instr->right();
 
   bool can_overflow = instr->hydrogen()->CheckFlag(HValue::kCanOverflow);
   bool bailout_on_minus_zero =
@@ -1360,7 +1468,7 @@ void LCodeGen::DoMulI(LMulI* instr) {
   } else {
     Register right = EmitLoadRegister(right_op, scratch);
     if (bailout_on_minus_zero) {
-      __ orr(ToRegister(instr->TempAt(0)), left, right);
+      __ orr(ToRegister(instr->temp()), left, right);
     }
 
     if (can_overflow) {
@@ -1377,7 +1485,7 @@ void LCodeGen::DoMulI(LMulI* instr) {
       Label done;
       __ cmp(result, Operand(0));
       __ b(ne, &done);
-      __ cmp(ToRegister(instr->TempAt(0)), Operand(0));
+      __ cmp(ToRegister(instr->temp()), Operand(0));
       DeoptimizeIf(mi, instr->environment());
       __ bind(&done);
     }
@@ -1386,8 +1494,8 @@ void LCodeGen::DoMulI(LMulI* instr) {
 
 
 void LCodeGen::DoBitI(LBitI* instr) {
-  LOperand* left_op = instr->InputAt(0);
-  LOperand* right_op = instr->InputAt(1);
+  LOperand* left_op = instr->left();
+  LOperand* right_op = instr->right();
   ASSERT(left_op->IsRegister());
   Register left = ToRegister(left_op);
   Register result = ToRegister(instr->result());
@@ -1420,14 +1528,17 @@ void LCodeGen::DoBitI(LBitI* instr) {
 void LCodeGen::DoShiftI(LShiftI* instr) {
   // Both 'left' and 'right' are "used at start" (see LCodeGen::DoShift), so
   // result may alias either of them.
-  LOperand* right_op = instr->InputAt(1);
-  Register left = ToRegister(instr->InputAt(0));
+  LOperand* right_op = instr->right();
+  Register left = ToRegister(instr->left());
   Register result = ToRegister(instr->result());
   Register scratch = scratch0();
   if (right_op->IsRegister()) {
     // Mask the right_op operand.
     __ and_(scratch, ToRegister(right_op), Operand(0x1F));
     switch (instr->op()) {
+      case Token::ROR:
+        __ mov(result, Operand(left, ROR, scratch));
+        break;
       case Token::SAR:
         __ mov(result, Operand(left, ASR, scratch));
         break;
@@ -1451,6 +1562,13 @@ void LCodeGen::DoShiftI(LShiftI* instr) {
     int value = ToInteger32(LConstantOperand::cast(right_op));
     uint8_t shift_count = static_cast<uint8_t>(value & 0x1F);
     switch (instr->op()) {
+      case Token::ROR:
+          if (shift_count != 0) {
+          __ mov(result, Operand(left, ROR, shift_count));
+        } else {
+          __ Move(result, left);
+        }
+        break;
       case Token::SAR:
         if (shift_count != 0) {
           __ mov(result, Operand(left, ASR, shift_count));
@@ -1485,8 +1603,8 @@ void LCodeGen::DoShiftI(LShiftI* instr) {
 
 
 void LCodeGen::DoSubI(LSubI* instr) {
-  LOperand* left = instr->InputAt(0);
-  LOperand* right = instr->InputAt(1);
+  LOperand* left = instr->left();
+  LOperand* right = instr->right();
   LOperand* result = instr->result();
   bool can_overflow = instr->hydrogen()->CheckFlag(HValue::kCanOverflow);
   SBit set_cond = can_overflow ? SetCC : LeaveCC;
@@ -1505,6 +1623,27 @@ void LCodeGen::DoSubI(LSubI* instr) {
 }
 
 
+void LCodeGen::DoRSubI(LRSubI* instr) {
+  LOperand* left = instr->left();
+  LOperand* right = instr->right();
+  LOperand* result = instr->result();
+  bool can_overflow = instr->hydrogen()->CheckFlag(HValue::kCanOverflow);
+  SBit set_cond = can_overflow ? SetCC : LeaveCC;
+
+  if (right->IsStackSlot() || right->IsArgument()) {
+    Register right_reg = EmitLoadRegister(right, ip);
+    __ rsb(ToRegister(result), ToRegister(left), Operand(right_reg), set_cond);
+  } else {
+    ASSERT(right->IsRegister() || right->IsConstantOperand());
+    __ rsb(ToRegister(result), ToRegister(left), ToOperand(right), set_cond);
+  }
+
+  if (can_overflow) {
+    DeoptimizeIf(vs, instr->environment());
+  }
+}
+
+
 void LCodeGen::DoConstantI(LConstantI* instr) {
   ASSERT(instr->result()->IsRegister());
   __ mov(ToRegister(instr->result()), Operand(instr->value()));
@@ -1515,7 +1654,7 @@ void LCodeGen::DoConstantD(LConstantD* instr) {
   ASSERT(instr->result()->IsDoubleRegister());
   DwVfpRegister result = ToDoubleRegister(instr->result());
   double v = instr->value();
-  __ Vmov(result, v);
+  __ Vmov(result, v, scratch0());
 }
 
 
@@ -1532,28 +1671,28 @@ void LCodeGen::DoConstantT(LConstantT* instr) {
 
 void LCodeGen::DoJSArrayLength(LJSArrayLength* instr) {
   Register result = ToRegister(instr->result());
-  Register array = ToRegister(instr->InputAt(0));
+  Register array = ToRegister(instr->value());
   __ ldr(result, FieldMemOperand(array, JSArray::kLengthOffset));
 }
 
 
 void LCodeGen::DoFixedArrayBaseLength(LFixedArrayBaseLength* instr) {
   Register result = ToRegister(instr->result());
-  Register array = ToRegister(instr->InputAt(0));
+  Register array = ToRegister(instr->value());
   __ ldr(result, FieldMemOperand(array, FixedArrayBase::kLengthOffset));
 }
 
 
 void LCodeGen::DoMapEnumLength(LMapEnumLength* instr) {
   Register result = ToRegister(instr->result());
-  Register map = ToRegister(instr->InputAt(0));
+  Register map = ToRegister(instr->value());
   __ EnumLength(result, map);
 }
 
 
 void LCodeGen::DoElementsKind(LElementsKind* instr) {
   Register result = ToRegister(instr->result());
-  Register input = ToRegister(instr->InputAt(0));
+  Register input = ToRegister(instr->value());
 
   // Load map into |result|.
   __ ldr(result, FieldMemOperand(input, HeapObject::kMapOffset));
@@ -1566,9 +1705,9 @@ void LCodeGen::DoElementsKind(LElementsKind* instr) {
 
 
 void LCodeGen::DoValueOf(LValueOf* instr) {
-  Register input = ToRegister(instr->InputAt(0));
+  Register input = ToRegister(instr->value());
   Register result = ToRegister(instr->result());
-  Register map = ToRegister(instr->TempAt(0));
+  Register map = ToRegister(instr->temp());
   Label done;
 
   // If the object is a smi return the object.
@@ -1587,9 +1726,9 @@ void LCodeGen::DoValueOf(LValueOf* instr) {
 
 
 void LCodeGen::DoDateField(LDateField* instr) {
-  Register object = ToRegister(instr->InputAt(0));
+  Register object = ToRegister(instr->date());
   Register result = ToRegister(instr->result());
-  Register scratch = ToRegister(instr->TempAt(0));
+  Register scratch = ToRegister(instr->temp());
   Smi* index = instr->index();
   Label runtime, done;
   ASSERT(object.is(result));
@@ -1625,15 +1764,24 @@ void LCodeGen::DoDateField(LDateField* instr) {
 }
 
 
+void LCodeGen::DoSeqStringSetChar(LSeqStringSetChar* instr) {
+  SeqStringSetCharGenerator::Generate(masm(),
+                                      instr->encoding(),
+                                      ToRegister(instr->string()),
+                                      ToRegister(instr->index()),
+                                      ToRegister(instr->value()));
+}
+
+
 void LCodeGen::DoBitNotI(LBitNotI* instr) {
-  Register input = ToRegister(instr->InputAt(0));
+  Register input = ToRegister(instr->value());
   Register result = ToRegister(instr->result());
   __ mvn(result, Operand(input));
 }
 
 
 void LCodeGen::DoThrow(LThrow* instr) {
-  Register input_reg = EmitLoadRegister(instr->InputAt(0), ip);
+  Register input_reg = EmitLoadRegister(instr->value(), ip);
   __ push(input_reg);
   CallRuntime(Runtime::kThrow, 1, instr);
 
@@ -1644,8 +1792,8 @@ void LCodeGen::DoThrow(LThrow* instr) {
 
 
 void LCodeGen::DoAddI(LAddI* instr) {
-  LOperand* left = instr->InputAt(0);
-  LOperand* right = instr->InputAt(1);
+  LOperand* left = instr->left();
+  LOperand* right = instr->right();
   LOperand* result = instr->result();
   bool can_overflow = instr->hydrogen()->CheckFlag(HValue::kCanOverflow);
   SBit set_cond = can_overflow ? SetCC : LeaveCC;
@@ -1665,8 +1813,8 @@ void LCodeGen::DoAddI(LAddI* instr) {
 
 
 void LCodeGen::DoMathMinMax(LMathMinMax* instr) {
-  LOperand* left = instr->InputAt(0);
-  LOperand* right = instr->InputAt(1);
+  LOperand* left = instr->left();
+  LOperand* right = instr->right();
   HMathMinMax::Operation operation = instr->hydrogen()->operation();
   Condition condition = (operation == HMathMinMax::kMathMin) ? le : ge;
   if (instr->hydrogen()->representation().IsInteger32()) {
@@ -1727,8 +1875,8 @@ void LCodeGen::DoMathMinMax(LMathMinMax* instr) {
 
 
 void LCodeGen::DoArithmeticD(LArithmeticD* instr) {
-  DoubleRegister left = ToDoubleRegister(instr->InputAt(0));
-  DoubleRegister right = ToDoubleRegister(instr->InputAt(1));
+  DoubleRegister left = ToDoubleRegister(instr->left());
+  DoubleRegister right = ToDoubleRegister(instr->right());
   DoubleRegister result = ToDoubleRegister(instr->result());
   switch (instr->op()) {
     case Token::ADD:
@@ -1767,8 +1915,8 @@ void LCodeGen::DoArithmeticD(LArithmeticD* instr) {
 
 
 void LCodeGen::DoArithmeticT(LArithmeticT* instr) {
-  ASSERT(ToRegister(instr->InputAt(0)).is(r1));
-  ASSERT(ToRegister(instr->InputAt(1)).is(r0));
+  ASSERT(ToRegister(instr->left()).is(r1));
+  ASSERT(ToRegister(instr->right()).is(r0));
   ASSERT(ToRegister(instr->result()).is(r0));
 
   BinaryOpStub stub(instr->op(), NO_OVERWRITE);
@@ -1813,11 +1961,11 @@ void LCodeGen::DoBranch(LBranch* instr) {
 
   Representation r = instr->hydrogen()->value()->representation();
   if (r.IsInteger32()) {
-    Register reg = ToRegister(instr->InputAt(0));
+    Register reg = ToRegister(instr->value());
     __ cmp(reg, Operand(0));
     EmitBranch(true_block, false_block, ne);
   } else if (r.IsDouble()) {
-    DoubleRegister reg = ToDoubleRegister(instr->InputAt(0));
+    DoubleRegister reg = ToDoubleRegister(instr->value());
     Register scratch = scratch0();
 
     // Test the double value. Zero and NaN are false.
@@ -1826,7 +1974,7 @@ void LCodeGen::DoBranch(LBranch* instr) {
     EmitBranch(true_block, false_block, eq);
   } else {
     ASSERT(r.IsTagged());
-    Register reg = ToRegister(instr->InputAt(0));
+    Register reg = ToRegister(instr->value());
     HType type = instr->hydrogen()->value()->type();
     if (type.IsBoolean()) {
       __ CompareRoot(reg, Heap::kTrueValueRootIndex);
@@ -1965,8 +2113,8 @@ Condition LCodeGen::TokenToCondition(Token::Value op, bool is_unsigned) {
 
 
 void LCodeGen::DoCmpIDAndBranch(LCmpIDAndBranch* instr) {
-  LOperand* left = instr->InputAt(0);
-  LOperand* right = instr->InputAt(1);
+  LOperand* left = instr->left();
+  LOperand* right = instr->right();
   int false_block = chunk_->LookupDestination(instr->false_block_id());
   int true_block = chunk_->LookupDestination(instr->true_block_id());
   Condition cond = TokenToCondition(instr->op(), false);
@@ -2006,8 +2154,8 @@ void LCodeGen::DoCmpIDAndBranch(LCmpIDAndBranch* instr) {
 
 
 void LCodeGen::DoCmpObjectEqAndBranch(LCmpObjectEqAndBranch* instr) {
-  Register left = ToRegister(instr->InputAt(0));
-  Register right = ToRegister(instr->InputAt(1));
+  Register left = ToRegister(instr->left());
+  Register right = ToRegister(instr->right());
   int false_block = chunk_->LookupDestination(instr->false_block_id());
   int true_block = chunk_->LookupDestination(instr->true_block_id());
 
@@ -2017,7 +2165,7 @@ void LCodeGen::DoCmpObjectEqAndBranch(LCmpObjectEqAndBranch* instr) {
 
 
 void LCodeGen::DoCmpConstantEqAndBranch(LCmpConstantEqAndBranch* instr) {
-  Register left = ToRegister(instr->InputAt(0));
+  Register left = ToRegister(instr->left());
   int true_block = chunk_->LookupDestination(instr->true_block_id());
   int false_block = chunk_->LookupDestination(instr->false_block_id());
 
@@ -2028,7 +2176,7 @@ void LCodeGen::DoCmpConstantEqAndBranch(LCmpConstantEqAndBranch* instr) {
 
 void LCodeGen::DoIsNilAndBranch(LIsNilAndBranch* instr) {
   Register scratch = scratch0();
-  Register reg = ToRegister(instr->InputAt(0));
+  Register reg = ToRegister(instr->value());
   int false_block = chunk_->LookupDestination(instr->false_block_id());
 
   // If the expression is known to be untagged or a smi, then it's definitely
@@ -2096,8 +2244,8 @@ Condition LCodeGen::EmitIsObject(Register input,
 
 
 void LCodeGen::DoIsObjectAndBranch(LIsObjectAndBranch* instr) {
-  Register reg = ToRegister(instr->InputAt(0));
-  Register temp1 = ToRegister(instr->TempAt(0));
+  Register reg = ToRegister(instr->value());
+  Register temp1 = ToRegister(instr->temp());
 
   int true_block = chunk_->LookupDestination(instr->true_block_id());
   int false_block = chunk_->LookupDestination(instr->false_block_id());
@@ -2122,8 +2270,8 @@ Condition LCodeGen::EmitIsString(Register input,
 
 
 void LCodeGen::DoIsStringAndBranch(LIsStringAndBranch* instr) {
-  Register reg = ToRegister(instr->InputAt(0));
-  Register temp1 = ToRegister(instr->TempAt(0));
+  Register reg = ToRegister(instr->value());
+  Register temp1 = ToRegister(instr->temp());
 
   int true_block = chunk_->LookupDestination(instr->true_block_id());
   int false_block = chunk_->LookupDestination(instr->false_block_id());
@@ -2140,15 +2288,15 @@ void LCodeGen::DoIsSmiAndBranch(LIsSmiAndBranch* instr) {
   int true_block = chunk_->LookupDestination(instr->true_block_id());
   int false_block = chunk_->LookupDestination(instr->false_block_id());
 
-  Register input_reg = EmitLoadRegister(instr->InputAt(0), ip);
+  Register input_reg = EmitLoadRegister(instr->value(), ip);
   __ tst(input_reg, Operand(kSmiTagMask));
   EmitBranch(true_block, false_block, eq);
 }
 
 
 void LCodeGen::DoIsUndetectableAndBranch(LIsUndetectableAndBranch* instr) {
-  Register input = ToRegister(instr->InputAt(0));
-  Register temp = ToRegister(instr->TempAt(0));
+  Register input = ToRegister(instr->value());
+  Register temp = ToRegister(instr->temp());
 
   int true_block = chunk_->LookupDestination(instr->true_block_id());
   int false_block = chunk_->LookupDestination(instr->false_block_id());
@@ -2218,7 +2366,7 @@ static Condition BranchCondition(HHasInstanceTypeAndBranch* instr) {
 
 void LCodeGen::DoHasInstanceTypeAndBranch(LHasInstanceTypeAndBranch* instr) {
   Register scratch = scratch0();
-  Register input = ToRegister(instr->InputAt(0));
+  Register input = ToRegister(instr->value());
 
   int true_block = chunk_->LookupDestination(instr->true_block_id());
   int false_block = chunk_->LookupDestination(instr->false_block_id());
@@ -2233,10 +2381,10 @@ void LCodeGen::DoHasInstanceTypeAndBranch(LHasInstanceTypeAndBranch* instr) {
 
 
 void LCodeGen::DoGetCachedArrayIndex(LGetCachedArrayIndex* instr) {
-  Register input = ToRegister(instr->InputAt(0));
+  Register input = ToRegister(instr->value());
   Register result = ToRegister(instr->result());
 
-  __ AbortIfNotString(input);
+  __ AssertString(input);
 
   __ ldr(result, FieldMemOperand(input, String::kHashFieldOffset));
   __ IndexFromHash(result, result);
@@ -2245,7 +2393,7 @@ void LCodeGen::DoGetCachedArrayIndex(LGetCachedArrayIndex* instr) {
 
 void LCodeGen::DoHasCachedArrayIndexAndBranch(
     LHasCachedArrayIndexAndBranch* instr) {
-  Register input = ToRegister(instr->InputAt(0));
+  Register input = ToRegister(instr->value());
   Register scratch = scratch0();
 
   int true_block = chunk_->LookupDestination(instr->true_block_id());
@@ -2326,9 +2474,9 @@ void LCodeGen::EmitClassOfTest(Label* is_true,
 
 
 void LCodeGen::DoClassOfTestAndBranch(LClassOfTestAndBranch* instr) {
-  Register input = ToRegister(instr->InputAt(0));
+  Register input = ToRegister(instr->value());
   Register temp = scratch0();
-  Register temp2 = ToRegister(instr->TempAt(0));
+  Register temp2 = ToRegister(instr->temp());
   Handle<String> class_name = instr->hydrogen()->class_name();
 
   int true_block = chunk_->LookupDestination(instr->true_block_id());
@@ -2344,8 +2492,8 @@ void LCodeGen::DoClassOfTestAndBranch(LClassOfTestAndBranch* instr) {
 
 
 void LCodeGen::DoCmpMapAndBranch(LCmpMapAndBranch* instr) {
-  Register reg = ToRegister(instr->InputAt(0));
-  Register temp = ToRegister(instr->TempAt(0));
+  Register reg = ToRegister(instr->value());
+  Register temp = ToRegister(instr->temp());
   int true_block = instr->true_block_id();
   int false_block = instr->false_block_id();
 
@@ -2356,8 +2504,8 @@ void LCodeGen::DoCmpMapAndBranch(LCmpMapAndBranch* instr) {
 
 
 void LCodeGen::DoInstanceOf(LInstanceOf* instr) {
-  ASSERT(ToRegister(instr->InputAt(0)).is(r0));  // Object is in r0.
-  ASSERT(ToRegister(instr->InputAt(1)).is(r1));  // Function is in r1.
+  ASSERT(ToRegister(instr->left()).is(r0));  // Object is in r0.
+  ASSERT(ToRegister(instr->right()).is(r1));  // Function is in r1.
 
   InstanceofStub stub(InstanceofStub::kArgsInRegisters);
   CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr);
@@ -2388,8 +2536,8 @@ void LCodeGen::DoInstanceOfKnownGlobal(LInstanceOfKnownGlobal* instr) {
   deferred = new(zone()) DeferredInstanceOfKnownGlobal(this, instr);
 
   Label done, false_result;
-  Register object = ToRegister(instr->InputAt(0));
-  Register temp = ToRegister(instr->TempAt(0));
+  Register object = ToRegister(instr->value());
+  Register temp = ToRegister(instr->temp());
   Register result = ToRegister(instr->result());
 
   ASSERT(object.is(r0));
@@ -2412,6 +2560,7 @@ void LCodeGen::DoInstanceOfKnownGlobal(LInstanceOfKnownGlobal* instr) {
     // We use Factory::the_hole_value() on purpose instead of loading from the
     // root array to force relocation to be able to later patch with
     // the cached map.
+    PredictableCodeSizeScope predictable(masm_, 5 * Assembler::kInstrSize);
     Handle<JSGlobalPropertyCell> cell =
         factory()->NewJSGlobalPropertyCell(factory()->the_hole_value());
     __ mov(ip, Operand(Handle<Object>(cell)));
@@ -2469,10 +2618,13 @@ void LCodeGen::DoDeferredInstanceOfKnownGlobal(LInstanceOfKnownGlobal* instr,
   // Get the temp register reserved by the instruction. This needs to be r4 as
   // its slot of the pushing of safepoint registers is used to communicate the
   // offset to the location of the map check.
-  Register temp = ToRegister(instr->TempAt(0));
+  Register temp = ToRegister(instr->temp());
   ASSERT(temp.is(r4));
   __ LoadHeapObject(InstanceofStub::right(), instr->function());
   static const int kAdditionalDelta = 5;
+  // Make sure that code size is predicable, since we use specific constants
+  // offsets in the code to find embedded values..
+  PredictableCodeSizeScope predictable(masm_, 6 * Assembler::kInstrSize);
   int delta = masm_->InstructionsGeneratedSince(map_check) + kAdditionalDelta;
   Label before_push_delta;
   __ bind(&before_push_delta);
@@ -2566,7 +2718,7 @@ void LCodeGen::DoStoreGlobalCell(LStoreGlobalCell* instr) {
   // it as no longer deleted.
   if (instr->hydrogen()->RequiresHoleCheck()) {
     // We use a temp to check the payload (CompareRoot might clobber ip).
-    Register payload = ToRegister(instr->TempAt(0));
+    Register payload = ToRegister(instr->temp());
     __ ldr(payload, FieldMemOperand(cell, JSGlobalPropertyCell::kValueOffset));
     __ CompareRoot(payload, Heap::kTheHoleValueRootIndex);
     DeoptimizeIf(eq, instr->environment());
@@ -2645,7 +2797,7 @@ void LCodeGen::DoStoreContextSlot(LStoreContextSlot* instr) {
 
 
 void LCodeGen::DoLoadNamedField(LLoadNamedField* instr) {
-  Register object = ToRegister(instr->InputAt(0));
+  Register object = ToRegister(instr->object());
   Register result = ToRegister(instr->result());
   if (instr->hydrogen()->is_in_object()) {
     __ ldr(result, FieldMemOperand(object, instr->hydrogen()->offset()));
@@ -2736,7 +2888,7 @@ void LCodeGen::DoLoadNamedFieldPolymorphic(LLoadNamedFieldPolymorphic* instr) {
   if (need_generic) {
     __ mov(r2, Operand(name));
     Handle<Code> ic = isolate()->builtins()->LoadIC_Initialize();
-    CallCode(ic, RelocInfo::CODE_TARGET, instr);
+    CallCode(ic, RelocInfo::CODE_TARGET, instr, NEVER_INLINE_TARGET_ADDRESS);
   }
   __ bind(&done);
 }
@@ -2749,7 +2901,7 @@ void LCodeGen::DoLoadNamedGeneric(LLoadNamedGeneric* instr) {
   // Name is always in r2.
   __ mov(r2, Operand(instr->name()));
   Handle<Code> ic = isolate()->builtins()->LoadIC_Initialize();
-  CallCode(ic, RelocInfo::CODE_TARGET, instr);
+  CallCode(ic, RelocInfo::CODE_TARGET, instr, NEVER_INLINE_TARGET_ADDRESS);
 }
 
 
@@ -2799,7 +2951,7 @@ void LCodeGen::DoLoadFunctionPrototype(LLoadFunctionPrototype* instr) {
 
 void LCodeGen::DoLoadElements(LLoadElements* instr) {
   Register result = ToRegister(instr->result());
-  Register input = ToRegister(instr->InputAt(0));
+  Register input = ToRegister(instr->object());
   Register scratch = scratch0();
 
   __ ldr(result, FieldMemOperand(input, JSObject::kElementsOffset));
@@ -2834,7 +2986,7 @@ void LCodeGen::DoLoadElements(LLoadElements* instr) {
 void LCodeGen::DoLoadExternalArrayPointer(
     LLoadExternalArrayPointer* instr) {
   Register to_reg = ToRegister(instr->result());
-  Register from_reg  = ToRegister(instr->InputAt(0));
+  Register from_reg  = ToRegister(instr->object());
   __ ldr(to_reg, FieldMemOperand(from_reg,
                                  ExternalArray::kExternalPointerOffset));
 }
@@ -2845,63 +2997,95 @@ void LCodeGen::DoAccessArgumentsAt(LAccessArgumentsAt* instr) {
   Register length = ToRegister(instr->length());
   Register index = ToRegister(instr->index());
   Register result = ToRegister(instr->result());
-
-  // Bailout index is not a valid argument index. Use unsigned check to get
-  // negative check for free.
-  __ sub(length, length, index, SetCC);
-  DeoptimizeIf(ls, instr->environment());
-
   // There are two words between the frame pointer and the last argument.
   // Subtracting from length accounts for one of them add one more.
+  __ sub(length, length, index);
   __ add(length, length, Operand(1));
   __ ldr(result, MemOperand(arguments, length, LSL, kPointerSizeLog2));
 }
 
 
-void LCodeGen::DoLoadKeyedFastElement(LLoadKeyedFastElement* instr) {
-  Register elements = ToRegister(instr->elements());
-  Register result = ToRegister(instr->result());
-  Register scratch = scratch0();
-  Register store_base = scratch;
-  int offset = 0;
-
-  if (instr->key()->IsConstantOperand()) {
-    LConstantOperand* const_operand = LConstantOperand::cast(instr->key());
-    offset = FixedArray::OffsetOfElementAt(ToInteger32(const_operand) +
-                                           instr->additional_index());
-    store_base = elements;
-  } else {
-    Register key = EmitLoadRegister(instr->key(), scratch0());
-    // Even though the HLoadKeyedFastElement instruction forces the input
-    // representation for the key to be an integer, the input gets replaced
-    // during bound check elimination with the index argument to the bounds
-    // check, which can be tagged, so that case must be handled here, too.
-    if (instr->hydrogen()->key()->representation().IsTagged()) {
-      __ add(scratch, elements,
-             Operand(key, LSL, kPointerSizeLog2 - kSmiTagSize));
-    } else {
-      __ add(scratch, elements, Operand(key, LSL, kPointerSizeLog2));
+void LCodeGen::DoLoadKeyedExternalArray(LLoadKeyed* instr) {
+  Register external_pointer = ToRegister(instr->elements());
+  Register key = no_reg;
+  ElementsKind elements_kind = instr->elements_kind();
+  bool key_is_constant = instr->key()->IsConstantOperand();
+  int constant_key = 0;
+  if (key_is_constant) {
+    constant_key = ToInteger32(LConstantOperand::cast(instr->key()));
+    if (constant_key & 0xF0000000) {
+      Abort("array index constant value too big.");
     }
-    offset = FixedArray::OffsetOfElementAt(instr->additional_index());
+  } else {
+    key = ToRegister(instr->key());
   }
-  __ ldr(result, FieldMemOperand(store_base, offset));
+  int element_size_shift = ElementsKindToShiftSize(elements_kind);
+  int shift_size = (instr->hydrogen()->key()->representation().IsTagged())
+      ? (element_size_shift - kSmiTagSize) : element_size_shift;
+  int additional_offset = instr->additional_index() << element_size_shift;
 
-  // Check for the hole value.
-  if (instr->hydrogen()->RequiresHoleCheck()) {
-    if (IsFastSmiElementsKind(instr->hydrogen()->elements_kind())) {
-      __ tst(result, Operand(kSmiTagMask));
-      DeoptimizeIf(ne, instr->environment());
-    } else {
-      __ LoadRoot(scratch, Heap::kTheHoleValueRootIndex);
-      __ cmp(result, scratch);
-      DeoptimizeIf(eq, instr->environment());
+  if (elements_kind == EXTERNAL_FLOAT_ELEMENTS ||
+      elements_kind == EXTERNAL_DOUBLE_ELEMENTS) {
+    CpuFeatures::Scope scope(VFP3);
+    DwVfpRegister result = ToDoubleRegister(instr->result());
+    Operand operand = key_is_constant
+        ? Operand(constant_key << element_size_shift)
+        : Operand(key, LSL, shift_size);
+    __ add(scratch0(), external_pointer, operand);
+    if (elements_kind == EXTERNAL_FLOAT_ELEMENTS) {
+      __ vldr(result.low(), scratch0(), additional_offset);
+      __ vcvt_f64_f32(result, result.low());
+    } else  {  // i.e. elements_kind == EXTERNAL_DOUBLE_ELEMENTS
+      __ vldr(result, scratch0(), additional_offset);
+    }
+  } else {
+    Register result = ToRegister(instr->result());
+    MemOperand mem_operand = PrepareKeyedOperand(
+        key, external_pointer, key_is_constant, constant_key,
+        element_size_shift, shift_size,
+        instr->additional_index(), additional_offset);
+    switch (elements_kind) {
+      case EXTERNAL_BYTE_ELEMENTS:
+        __ ldrsb(result, mem_operand);
+        break;
+      case EXTERNAL_PIXEL_ELEMENTS:
+      case EXTERNAL_UNSIGNED_BYTE_ELEMENTS:
+        __ ldrb(result, mem_operand);
+        break;
+      case EXTERNAL_SHORT_ELEMENTS:
+        __ ldrsh(result, mem_operand);
+        break;
+      case EXTERNAL_UNSIGNED_SHORT_ELEMENTS:
+        __ ldrh(result, mem_operand);
+        break;
+      case EXTERNAL_INT_ELEMENTS:
+        __ ldr(result, mem_operand);
+        break;
+      case EXTERNAL_UNSIGNED_INT_ELEMENTS:
+        __ ldr(result, mem_operand);
+        if (!instr->hydrogen()->CheckFlag(HInstruction::kUint32)) {
+          __ cmp(result, Operand(0x80000000));
+          DeoptimizeIf(cs, instr->environment());
+        }
+        break;
+      case EXTERNAL_FLOAT_ELEMENTS:
+      case EXTERNAL_DOUBLE_ELEMENTS:
+      case FAST_HOLEY_DOUBLE_ELEMENTS:
+      case FAST_HOLEY_ELEMENTS:
+      case FAST_HOLEY_SMI_ELEMENTS:
+      case FAST_DOUBLE_ELEMENTS:
+      case FAST_ELEMENTS:
+      case FAST_SMI_ELEMENTS:
+      case DICTIONARY_ELEMENTS:
+      case NON_STRICT_ARGUMENTS_ELEMENTS:
+        UNREACHABLE();
+        break;
     }
   }
 }
 
 
-void LCodeGen::DoLoadKeyedFastDoubleElement(
-    LLoadKeyedFastDoubleElement* instr) {
+void LCodeGen::DoLoadKeyedFixedDoubleArray(LLoadKeyed* instr) {
   Register elements = ToRegister(instr->elements());
   bool key_is_constant = instr->key()->IsConstantOperand();
   Register key = no_reg;
@@ -2933,13 +3117,65 @@ void LCodeGen::DoLoadKeyedFastDoubleElement(
                    (instr->additional_index() << element_size_shift)));
   }
 
+  __ vldr(result, elements, 0);
   if (instr->hydrogen()->RequiresHoleCheck()) {
     __ ldr(scratch, MemOperand(elements, sizeof(kHoleNanLower32)));
     __ cmp(scratch, Operand(kHoleNanUpper32));
     DeoptimizeIf(eq, instr->environment());
   }
+}
 
-  __ vldr(result, elements, 0);
+
+void LCodeGen::DoLoadKeyedFixedArray(LLoadKeyed* instr) {
+  Register elements = ToRegister(instr->elements());
+  Register result = ToRegister(instr->result());
+  Register scratch = scratch0();
+  Register store_base = scratch;
+  int offset = 0;
+
+  if (instr->key()->IsConstantOperand()) {
+    LConstantOperand* const_operand = LConstantOperand::cast(instr->key());
+    offset = FixedArray::OffsetOfElementAt(ToInteger32(const_operand) +
+                                           instr->additional_index());
+    store_base = elements;
+  } else {
+    Register key = EmitLoadRegister(instr->key(), scratch0());
+    // Even though the HLoadKeyed instruction forces the input
+    // representation for the key to be an integer, the input gets replaced
+    // during bound check elimination with the index argument to the bounds
+    // check, which can be tagged, so that case must be handled here, too.
+    if (instr->hydrogen()->key()->representation().IsTagged()) {
+      __ add(scratch, elements,
+             Operand(key, LSL, kPointerSizeLog2 - kSmiTagSize));
+    } else {
+      __ add(scratch, elements, Operand(key, LSL, kPointerSizeLog2));
+    }
+    offset = FixedArray::OffsetOfElementAt(instr->additional_index());
+  }
+  __ ldr(result, FieldMemOperand(store_base, offset));
+
+  // Check for the hole value.
+  if (instr->hydrogen()->RequiresHoleCheck()) {
+    if (IsFastSmiElementsKind(instr->hydrogen()->elements_kind())) {
+      __ tst(result, Operand(kSmiTagMask));
+      DeoptimizeIf(ne, instr->environment());
+    } else {
+      __ LoadRoot(scratch, Heap::kTheHoleValueRootIndex);
+      __ cmp(result, scratch);
+      DeoptimizeIf(eq, instr->environment());
+    }
+  }
+}
+
+
+void LCodeGen::DoLoadKeyed(LLoadKeyed* instr) {
+  if (instr->is_external()) {
+    DoLoadKeyedExternalArray(instr);
+  } else if (instr->hydrogen()->representation().IsDouble()) {
+    DoLoadKeyedFixedDoubleArray(instr);
+  } else {
+    DoLoadKeyedFixedArray(instr);
+  }
 }
 
 
@@ -2979,93 +3215,12 @@ MemOperand LCodeGen::PrepareKeyedOperand(Register key,
 }
 
 
-void LCodeGen::DoLoadKeyedSpecializedArrayElement(
-    LLoadKeyedSpecializedArrayElement* instr) {
-  Register external_pointer = ToRegister(instr->external_pointer());
-  Register key = no_reg;
-  ElementsKind elements_kind = instr->elements_kind();
-  bool key_is_constant = instr->key()->IsConstantOperand();
-  int constant_key = 0;
-  if (key_is_constant) {
-    constant_key = ToInteger32(LConstantOperand::cast(instr->key()));
-    if (constant_key & 0xF0000000) {
-      Abort("array index constant value too big.");
-    }
-  } else {
-    key = ToRegister(instr->key());
-  }
-  int element_size_shift = ElementsKindToShiftSize(elements_kind);
-  int shift_size = (instr->hydrogen()->key()->representation().IsTagged())
-      ? (element_size_shift - kSmiTagSize) : element_size_shift;
-  int additional_offset = instr->additional_index() << element_size_shift;
-
-  if (elements_kind == EXTERNAL_FLOAT_ELEMENTS ||
-      elements_kind == EXTERNAL_DOUBLE_ELEMENTS) {
-    CpuFeatures::Scope scope(VFP3);
-    DwVfpRegister result = ToDoubleRegister(instr->result());
-    Operand operand = key_is_constant
-        ? Operand(constant_key << element_size_shift)
-        : Operand(key, LSL, shift_size);
-    __ add(scratch0(), external_pointer, operand);
-    if (elements_kind == EXTERNAL_FLOAT_ELEMENTS) {
-      __ vldr(result.low(), scratch0(), additional_offset);
-      __ vcvt_f64_f32(result, result.low());
-    } else  {  // i.e. elements_kind == EXTERNAL_DOUBLE_ELEMENTS
-      __ vldr(result, scratch0(), additional_offset);
-    }
-  } else {
-    Register result = ToRegister(instr->result());
-    MemOperand mem_operand = PrepareKeyedOperand(
-        key, external_pointer, key_is_constant, constant_key,
-        element_size_shift, shift_size,
-        instr->additional_index(), additional_offset);
-    switch (elements_kind) {
-      case EXTERNAL_BYTE_ELEMENTS:
-        __ ldrsb(result, mem_operand);
-        break;
-      case EXTERNAL_PIXEL_ELEMENTS:
-      case EXTERNAL_UNSIGNED_BYTE_ELEMENTS:
-        __ ldrb(result, mem_operand);
-        break;
-      case EXTERNAL_SHORT_ELEMENTS:
-        __ ldrsh(result, mem_operand);
-        break;
-      case EXTERNAL_UNSIGNED_SHORT_ELEMENTS:
-        __ ldrh(result, mem_operand);
-        break;
-      case EXTERNAL_INT_ELEMENTS:
-        __ ldr(result, mem_operand);
-        break;
-      case EXTERNAL_UNSIGNED_INT_ELEMENTS:
-        __ ldr(result, mem_operand);
-        if (!instr->hydrogen()->CheckFlag(HInstruction::kUint32)) {
-          __ cmp(result, Operand(0x80000000));
-          DeoptimizeIf(cs, instr->environment());
-        }
-        break;
-      case EXTERNAL_FLOAT_ELEMENTS:
-      case EXTERNAL_DOUBLE_ELEMENTS:
-      case FAST_HOLEY_DOUBLE_ELEMENTS:
-      case FAST_HOLEY_ELEMENTS:
-      case FAST_HOLEY_SMI_ELEMENTS:
-      case FAST_DOUBLE_ELEMENTS:
-      case FAST_ELEMENTS:
-      case FAST_SMI_ELEMENTS:
-      case DICTIONARY_ELEMENTS:
-      case NON_STRICT_ARGUMENTS_ELEMENTS:
-        UNREACHABLE();
-        break;
-    }
-  }
-}
-
-
 void LCodeGen::DoLoadKeyedGeneric(LLoadKeyedGeneric* instr) {
   ASSERT(ToRegister(instr->object()).is(r1));
   ASSERT(ToRegister(instr->key()).is(r0));
 
   Handle<Code> ic = isolate()->builtins()->KeyedLoadIC_Initialize();
-  CallCode(ic, RelocInfo::CODE_TARGET, instr);
+  CallCode(ic, RelocInfo::CODE_TARGET, instr, NEVER_INLINE_TARGET_ADDRESS);
 }
 
 
@@ -3091,7 +3246,7 @@ void LCodeGen::DoArgumentsElements(LArgumentsElements* instr) {
 
 
 void LCodeGen::DoArgumentsLength(LArgumentsLength* instr) {
-  Register elem = ToRegister(instr->InputAt(0));
+  Register elem = ToRegister(instr->elements());
   Register result = ToRegister(instr->result());
 
   Label done;
@@ -3210,7 +3365,7 @@ void LCodeGen::DoApplyArguments(LApplyArguments* instr) {
 
 
 void LCodeGen::DoPushArgument(LPushArgument* instr) {
-  LOperand* argument = instr->InputAt(0);
+  LOperand* argument = instr->value();
   if (argument->IsDoubleRegister() || argument->IsDoubleStackSlot()) {
     Abort("DoPushArgument not implemented for double type.");
   } else {
@@ -3262,7 +3417,7 @@ void LCodeGen::DoGlobalObject(LGlobalObject* instr) {
 
 
 void LCodeGen::DoGlobalReceiver(LGlobalReceiver* instr) {
-  Register global = ToRegister(instr->global());
+  Register global = ToRegister(instr->global_object());
   Register result = ToRegister(instr->result());
   __ ldr(result, FieldMemOperand(global, GlobalObject::kGlobalReceiverOffset));
 }
@@ -3322,7 +3477,7 @@ void LCodeGen::DoCallConstantFunction(LCallConstantFunction* instr) {
 
 
 void LCodeGen::DoDeferredMathAbsTaggedHeapNumber(LUnaryMathOperation* instr) {
-  Register input = ToRegister(instr->InputAt(0));
+  Register input = ToRegister(instr->value());
   Register result = ToRegister(instr->result());
   Register scratch = scratch0();
 
@@ -3388,7 +3543,7 @@ void LCodeGen::DoDeferredMathAbsTaggedHeapNumber(LUnaryMathOperation* instr) {
 
 
 void LCodeGen::EmitIntegerMathAbs(LUnaryMathOperation* instr) {
-  Register input = ToRegister(instr->InputAt(0));
+  Register input = ToRegister(instr->value());
   Register result = ToRegister(instr->result());
   __ cmp(input, Operand(0));
   __ Move(result, input, pl);
@@ -3418,7 +3573,7 @@ void LCodeGen::DoMathAbs(LUnaryMathOperation* instr) {
 
   Representation r = instr->hydrogen()->value()->representation();
   if (r.IsDouble()) {
-    DwVfpRegister input = ToDoubleRegister(instr->InputAt(0));
+    DwVfpRegister input = ToDoubleRegister(instr->value());
     DwVfpRegister result = ToDoubleRegister(instr->result());
     __ vabs(result, input);
   } else if (r.IsInteger32()) {
@@ -3427,7 +3582,7 @@ void LCodeGen::DoMathAbs(LUnaryMathOperation* instr) {
     // Representation is tagged.
     DeferredMathAbsTaggedHeapNumber* deferred =
         new(zone()) DeferredMathAbsTaggedHeapNumber(this, instr);
-    Register input = ToRegister(instr->InputAt(0));
+    Register input = ToRegister(instr->value());
     // Smi check.
     __ JumpIfNotSmi(input, deferred->entry());
     // If smi, handle it directly.
@@ -3438,29 +3593,24 @@ void LCodeGen::DoMathAbs(LUnaryMathOperation* instr) {
 
 
 void LCodeGen::DoMathFloor(LUnaryMathOperation* instr) {
-  DoubleRegister input = ToDoubleRegister(instr->InputAt(0));
+  DoubleRegister input = ToDoubleRegister(instr->value());
   Register result = ToRegister(instr->result());
-  SwVfpRegister single_scratch = double_scratch0().low();
-  Register scratch1 = scratch0();
-  Register scratch2 = ToRegister(instr->TempAt(0));
+  Register scratch = scratch0();
 
   __ EmitVFPTruncate(kRoundToMinusInf,
-                     single_scratch,
+                     result,
                      input,
-                     scratch1,
-                     scratch2);
+                     scratch,
+                     double_scratch0());
   DeoptimizeIf(ne, instr->environment());
 
-  // Move the result back to general purpose register r0.
-  __ vmov(result, single_scratch);
-
   if (instr->hydrogen()->CheckFlag(HValue::kBailoutOnMinusZero)) {
     // Test for -0.
     Label done;
     __ cmp(result, Operand(0));
     __ b(ne, &done);
-    __ vmov(scratch1, input.high());
-    __ tst(scratch1, Operand(HeapNumber::kSignMask));
+    __ vmov(scratch, input.high());
+    __ tst(scratch, Operand(HeapNumber::kSignMask));
     DeoptimizeIf(ne, instr->environment());
     __ bind(&done);
   }
@@ -3468,8 +3618,9 @@ void LCodeGen::DoMathFloor(LUnaryMathOperation* instr) {
 
 
 void LCodeGen::DoMathRound(LUnaryMathOperation* instr) {
-  DoubleRegister input = ToDoubleRegister(instr->InputAt(0));
+  DoubleRegister input = ToDoubleRegister(instr->value());
   Register result = ToRegister(instr->result());
+  DwVfpRegister double_scratch1 = ToDoubleRegister(instr->temp());
   Register scratch = scratch0();
   Label done, check_sign_on_zero;
 
@@ -3494,12 +3645,12 @@ void LCodeGen::DoMathRound(LUnaryMathOperation* instr) {
   __ cmp(scratch, Operand(HeapNumber::kExponentBias + 32));
   DeoptimizeIf(ge, instr->environment());
 
+  __ Vmov(double_scratch0(), 0.5, scratch);
+  __ vadd(double_scratch0(), input, double_scratch0());
+
   // Save the original sign for later comparison.
   __ and_(scratch, result, Operand(HeapNumber::kSignMask));
 
-  __ Vmov(double_scratch0(), 0.5);
-  __ vadd(double_scratch0(), input, double_scratch0());
-
   // Check sign of the result: if the sign changed, the input
   // value was in ]0.5, 0[ and the result should be -0.
   __ vmov(result, double_scratch0().high());
@@ -3512,12 +3663,11 @@ void LCodeGen::DoMathRound(LUnaryMathOperation* instr) {
   }
 
   __ EmitVFPTruncate(kRoundToMinusInf,
-                     double_scratch0().low(),
-                     double_scratch0(),
                      result,
-                     scratch);
+                     double_scratch0(),
+                     scratch,
+                     double_scratch1);
   DeoptimizeIf(ne, instr->environment());
-  __ vmov(result, double_scratch0().low());
 
   if (instr->hydrogen()->CheckFlag(HValue::kBailoutOnMinusZero)) {
     // Test for -0.
@@ -3533,22 +3683,22 @@ void LCodeGen::DoMathRound(LUnaryMathOperation* instr) {
 
 
 void LCodeGen::DoMathSqrt(LUnaryMathOperation* instr) {
-  DoubleRegister input = ToDoubleRegister(instr->InputAt(0));
+  DoubleRegister input = ToDoubleRegister(instr->value());
   DoubleRegister result = ToDoubleRegister(instr->result());
   __ vsqrt(result, input);
 }
 
 
 void LCodeGen::DoMathPowHalf(LUnaryMathOperation* instr) {
-  DoubleRegister input = ToDoubleRegister(instr->InputAt(0));
+  DoubleRegister input = ToDoubleRegister(instr->value());
   DoubleRegister result = ToDoubleRegister(instr->result());
-  DoubleRegister temp = ToDoubleRegister(instr->TempAt(0));
+  DoubleRegister temp = ToDoubleRegister(instr->temp());
 
   // Note that according to ECMA-262 15.8.2.13:
   // Math.pow(-Infinity, 0.5) == Infinity
   // Math.sqrt(-Infinity) == NaN
   Label done;
-  __ vmov(temp, -V8_INFINITY);
+  __ vmov(temp, -V8_INFINITY, scratch0());
   __ VFPCompareAndSetFlags(input, temp);
   __ vneg(result, temp, eq);
   __ b(&done, eq);
@@ -3564,11 +3714,11 @@ void LCodeGen::DoPower(LPower* instr) {
   Representation exponent_type = instr->hydrogen()->right()->representation();
   // Having marked this as a call, we can use any registers.
   // Just make sure that the input/output registers are the expected ones.
-  ASSERT(!instr->InputAt(1)->IsDoubleRegister() ||
-         ToDoubleRegister(instr->InputAt(1)).is(d2));
-  ASSERT(!instr->InputAt(1)->IsRegister() ||
-         ToRegister(instr->InputAt(1)).is(r2));
-  ASSERT(ToDoubleRegister(instr->InputAt(0)).is(d1));
+  ASSERT(!instr->right()->IsDoubleRegister() ||
+         ToDoubleRegister(instr->right()).is(d2));
+  ASSERT(!instr->right()->IsRegister() ||
+         ToRegister(instr->right()).is(r2));
+  ASSERT(ToDoubleRegister(instr->left()).is(d1));
   ASSERT(ToDoubleRegister(instr->result()).is(d3));
 
   if (exponent_type.IsTagged()) {
@@ -3608,7 +3758,7 @@ void LCodeGen::DoRandom(LRandom* instr) {
   // Having marked this instruction as a call we can use any
   // registers.
   ASSERT(ToDoubleRegister(instr->result()).is(d7));
-  ASSERT(ToRegister(instr->InputAt(0)).is(r0));
+  ASSERT(ToRegister(instr->global_object()).is(r0));
 
   static const int kSeedSize = sizeof(uint32_t);
   STATIC_ASSERT(kPointerSize == kSeedSize);
@@ -3670,6 +3820,20 @@ void LCodeGen::DoDeferredRandom(LRandom* instr) {
 }
 
 
+void LCodeGen::DoMathExp(LMathExp* instr) {
+  DoubleRegister input = ToDoubleRegister(instr->value());
+  DoubleRegister result = ToDoubleRegister(instr->result());
+  DoubleRegister double_scratch1 = ToDoubleRegister(instr->double_temp());
+  DoubleRegister double_scratch2 = double_scratch0();
+  Register temp1 = ToRegister(instr->temp1());
+  Register temp2 = ToRegister(instr->temp2());
+
+  MathExpGenerator::EmitMathExp(
+      masm(), input, result, double_scratch1, double_scratch2,
+      temp1, temp2, scratch0());
+}
+
+
 void LCodeGen::DoMathLog(LUnaryMathOperation* instr) {
   ASSERT(ToDoubleRegister(instr->result()).is(d2));
   TranscendentalCacheStub stub(TranscendentalCache::LOG,
@@ -3765,7 +3929,7 @@ void LCodeGen::DoCallKeyed(LCallKeyed* instr) {
   int arity = instr->arity();
   Handle<Code> ic =
       isolate()->stub_cache()->ComputeKeyedCallInitialize(arity);
-  CallCode(ic, RelocInfo::CODE_TARGET, instr);
+  CallCode(ic, RelocInfo::CODE_TARGET, instr, NEVER_INLINE_TARGET_ADDRESS);
   __ ldr(cp, MemOperand(fp, StandardFrameConstants::kContextOffset));
 }
 
@@ -3778,7 +3942,7 @@ void LCodeGen::DoCallNamed(LCallNamed* instr) {
   Handle<Code> ic =
       isolate()->stub_cache()->ComputeCallInitialize(arity, mode);
   __ mov(r2, Operand(instr->name()));
-  CallCode(ic, mode, instr);
+  CallCode(ic, mode, instr, NEVER_INLINE_TARGET_ADDRESS);
   // Restore context register.
   __ ldr(cp, MemOperand(fp, StandardFrameConstants::kContextOffset));
 }
@@ -3803,7 +3967,7 @@ void LCodeGen::DoCallGlobal(LCallGlobal* instr) {
   Handle<Code> ic =
       isolate()->stub_cache()->ComputeCallInitialize(arity, mode);
   __ mov(r2, Operand(instr->name()));
-  CallCode(ic, mode, instr);
+  CallCode(ic, mode, instr, NEVER_INLINE_TARGET_ADDRESS);
   __ ldr(cp, MemOperand(fp, StandardFrameConstants::kContextOffset));
 }
 
@@ -3819,7 +3983,7 @@ void LCodeGen::DoCallKnownGlobal(LCallKnownGlobal* instr) {
 
 
 void LCodeGen::DoCallNew(LCallNew* instr) {
-  ASSERT(ToRegister(instr->InputAt(0)).is(r1));
+  ASSERT(ToRegister(instr->constructor()).is(r1));
   ASSERT(ToRegister(instr->result()).is(r0));
 
   CallConstructStub stub(NO_CALL_FUNCTION_FLAGS);
@@ -3845,7 +4009,7 @@ void LCodeGen::DoStoreNamedField(LStoreNamedField* instr) {
     __ mov(scratch, Operand(instr->transition()));
     __ str(scratch, FieldMemOperand(object, HeapObject::kMapOffset));
     if (instr->hydrogen()->NeedsWriteBarrierForMap()) {
-      Register temp = ToRegister(instr->TempAt(0));
+      Register temp = ToRegister(instr->temp());
       // Update the write barrier for the map field.
       __ RecordWriteField(object,
                           HeapObject::kMapOffset,
@@ -3903,7 +4067,7 @@ void LCodeGen::DoStoreNamedGeneric(LStoreNamedGeneric* instr) {
   Handle<Code> ic = (instr->strict_mode_flag() == kStrictMode)
       ? isolate()->builtins()->StoreIC_Initialize_Strict()
       : isolate()->builtins()->StoreIC_Initialize();
-  CallCode(ic, RelocInfo::CODE_TARGET, instr);
+  CallCode(ic, RelocInfo::CODE_TARGET, instr, NEVER_INLINE_TARGET_ADDRESS);
 }
 
 
@@ -3945,102 +4109,8 @@ void LCodeGen::DoBoundsCheck(LBoundsCheck* instr) {
 }
 
 
-void LCodeGen::DoStoreKeyedFastElement(LStoreKeyedFastElement* instr) {
-  Register value = ToRegister(instr->value());
-  Register elements = ToRegister(instr->object());
-  Register key = instr->key()->IsRegister() ? ToRegister(instr->key()) : no_reg;
-  Register scratch = scratch0();
-  Register store_base = scratch;
-  int offset = 0;
-
-  // Do the store.
-  if (instr->key()->IsConstantOperand()) {
-    ASSERT(!instr->hydrogen()->NeedsWriteBarrier());
-    LConstantOperand* const_operand = LConstantOperand::cast(instr->key());
-    offset = FixedArray::OffsetOfElementAt(ToInteger32(const_operand) +
-                                           instr->additional_index());
-    store_base = elements;
-  } else {
-    // Even though the HLoadKeyedFastElement instruction forces the input
-    // representation for the key to be an integer, the input gets replaced
-    // during bound check elimination with the index argument to the bounds
-    // check, which can be tagged, so that case must be handled here, too.
-    if (instr->hydrogen()->key()->representation().IsTagged()) {
-      __ add(scratch, elements,
-             Operand(key, LSL, kPointerSizeLog2 - kSmiTagSize));
-    } else {
-      __ add(scratch, elements, Operand(key, LSL, kPointerSizeLog2));
-    }
-    offset = FixedArray::OffsetOfElementAt(instr->additional_index());
-  }
-  __ str(value, FieldMemOperand(store_base, offset));
-
-  if (instr->hydrogen()->NeedsWriteBarrier()) {
-    HType type = instr->hydrogen()->value()->type();
-    SmiCheck check_needed =
-        type.IsHeapObject() ? OMIT_SMI_CHECK : INLINE_SMI_CHECK;
-    // Compute address of modified element and store it into key register.
-    __ add(key, store_base, Operand(offset - kHeapObjectTag));
-    __ RecordWrite(elements,
-                   key,
-                   value,
-                   kLRHasBeenSaved,
-                   kSaveFPRegs,
-                   EMIT_REMEMBERED_SET,
-                   check_needed);
-  }
-}
-
-
-void LCodeGen::DoStoreKeyedFastDoubleElement(
-    LStoreKeyedFastDoubleElement* instr) {
-  DwVfpRegister value = ToDoubleRegister(instr->value());
-  Register elements = ToRegister(instr->elements());
-  Register key = no_reg;
-  Register scratch = scratch0();
-  bool key_is_constant = instr->key()->IsConstantOperand();
-  int constant_key = 0;
-
-  // Calculate the effective address of the slot in the array to store the
-  // double value.
-  if (key_is_constant) {
-    constant_key = ToInteger32(LConstantOperand::cast(instr->key()));
-    if (constant_key & 0xF0000000) {
-      Abort("array index constant value too big.");
-    }
-  } else {
-    key = ToRegister(instr->key());
-  }
-  int element_size_shift = ElementsKindToShiftSize(FAST_DOUBLE_ELEMENTS);
-  int shift_size = (instr->hydrogen()->key()->representation().IsTagged())
-      ? (element_size_shift - kSmiTagSize) : element_size_shift;
-  Operand operand = key_is_constant
-      ? Operand((constant_key << element_size_shift) +
-                FixedDoubleArray::kHeaderSize - kHeapObjectTag)
-      : Operand(key, LSL, shift_size);
-  __ add(scratch, elements, operand);
-  if (!key_is_constant) {
-    __ add(scratch, scratch,
-           Operand(FixedDoubleArray::kHeaderSize - kHeapObjectTag));
-  }
-
-  if (instr->NeedsCanonicalization()) {
-    // Check for NaN. All NaNs must be canonicalized.
-    __ VFPCompareAndSetFlags(value, value);
-    // Only load canonical NaN if the comparison above set the overflow.
-    __ Vmov(value,
-            FixedDoubleArray::canonical_not_the_hole_nan_as_double(),
-            vs);
-  }
-
-  __ vstr(value, scratch, instr->additional_index() << element_size_shift);
-}
-
-
-void LCodeGen::DoStoreKeyedSpecializedArrayElement(
-    LStoreKeyedSpecializedArrayElement* instr) {
-
-  Register external_pointer = ToRegister(instr->external_pointer());
+void LCodeGen::DoStoreKeyedExternalArray(LStoreKeyed* instr) {
+  Register external_pointer = ToRegister(instr->elements());
   Register key = no_reg;
   ElementsKind elements_kind = instr->elements_kind();
   bool key_is_constant = instr->key()->IsConstantOperand();
@@ -4109,6 +4179,110 @@ void LCodeGen::DoStoreKeyedSpecializedArrayElement(
 }
 
 
+void LCodeGen::DoStoreKeyedFixedDoubleArray(LStoreKeyed* instr) {
+  DwVfpRegister value = ToDoubleRegister(instr->value());
+  Register elements = ToRegister(instr->elements());
+  Register key = no_reg;
+  Register scratch = scratch0();
+  bool key_is_constant = instr->key()->IsConstantOperand();
+  int constant_key = 0;
+
+  // Calculate the effective address of the slot in the array to store the
+  // double value.
+  if (key_is_constant) {
+    constant_key = ToInteger32(LConstantOperand::cast(instr->key()));
+    if (constant_key & 0xF0000000) {
+      Abort("array index constant value too big.");
+    }
+  } else {
+    key = ToRegister(instr->key());
+  }
+  int element_size_shift = ElementsKindToShiftSize(FAST_DOUBLE_ELEMENTS);
+  int shift_size = (instr->hydrogen()->key()->representation().IsTagged())
+      ? (element_size_shift - kSmiTagSize) : element_size_shift;
+  Operand operand = key_is_constant
+      ? Operand((constant_key << element_size_shift) +
+                FixedDoubleArray::kHeaderSize - kHeapObjectTag)
+      : Operand(key, LSL, shift_size);
+  __ add(scratch, elements, operand);
+  if (!key_is_constant) {
+    __ add(scratch, scratch,
+           Operand(FixedDoubleArray::kHeaderSize - kHeapObjectTag));
+  }
+
+  if (instr->NeedsCanonicalization()) {
+    // Check for NaN. All NaNs must be canonicalized.
+    __ VFPCompareAndSetFlags(value, value);
+    // Only load canonical NaN if the comparison above set the overflow.
+    __ Vmov(value,
+            FixedDoubleArray::canonical_not_the_hole_nan_as_double(),
+            no_reg, vs);
+  }
+
+  __ vstr(value, scratch, instr->additional_index() << element_size_shift);
+}
+
+
+void LCodeGen::DoStoreKeyedFixedArray(LStoreKeyed* instr) {
+  Register value = ToRegister(instr->value());
+  Register elements = ToRegister(instr->elements());
+  Register key = instr->key()->IsRegister() ? ToRegister(instr->key())
+      : no_reg;
+  Register scratch = scratch0();
+  Register store_base = scratch;
+  int offset = 0;
+
+  // Do the store.
+  if (instr->key()->IsConstantOperand()) {
+    ASSERT(!instr->hydrogen()->NeedsWriteBarrier());
+    LConstantOperand* const_operand = LConstantOperand::cast(instr->key());
+    offset = FixedArray::OffsetOfElementAt(ToInteger32(const_operand) +
+                                           instr->additional_index());
+    store_base = elements;
+  } else {
+    // Even though the HLoadKeyed instruction forces the input
+    // representation for the key to be an integer, the input gets replaced
+    // during bound check elimination with the index argument to the bounds
+    // check, which can be tagged, so that case must be handled here, too.
+    if (instr->hydrogen()->key()->representation().IsTagged()) {
+      __ add(scratch, elements,
+             Operand(key, LSL, kPointerSizeLog2 - kSmiTagSize));
+    } else {
+      __ add(scratch, elements, Operand(key, LSL, kPointerSizeLog2));
+    }
+    offset = FixedArray::OffsetOfElementAt(instr->additional_index());
+  }
+  __ str(value, FieldMemOperand(store_base, offset));
+
+  if (instr->hydrogen()->NeedsWriteBarrier()) {
+    HType type = instr->hydrogen()->value()->type();
+    SmiCheck check_needed =
+        type.IsHeapObject() ? OMIT_SMI_CHECK : INLINE_SMI_CHECK;
+    // Compute address of modified element and store it into key register.
+    __ add(key, store_base, Operand(offset - kHeapObjectTag));
+    __ RecordWrite(elements,
+                   key,
+                   value,
+                   kLRHasBeenSaved,
+                   kSaveFPRegs,
+                   EMIT_REMEMBERED_SET,
+                   check_needed);
+  }
+}
+
+
+void LCodeGen::DoStoreKeyed(LStoreKeyed* instr) {
+  // By cases: external, fast double
+  if (instr->is_external()) {
+    DoStoreKeyedExternalArray(instr);
+  } else if (instr->hydrogen()->value()->representation().IsDouble()) {
+    DoStoreKeyedFixedDoubleArray(instr);
+  } else {
+    DoStoreKeyedFixedArray(instr);
+  }
+}
+
+
 void LCodeGen::DoStoreKeyedGeneric(LStoreKeyedGeneric* instr) {
   ASSERT(ToRegister(instr->object()).is(r2));
   ASSERT(ToRegister(instr->key()).is(r1));
@@ -4117,13 +4291,13 @@ void LCodeGen::DoStoreKeyedGeneric(LStoreKeyedGeneric* instr) {
   Handle<Code> ic = (instr->strict_mode_flag() == kStrictMode)
       ? isolate()->builtins()->KeyedStoreIC_Initialize_Strict()
       : isolate()->builtins()->KeyedStoreIC_Initialize();
-  CallCode(ic, RelocInfo::CODE_TARGET, instr);
+  CallCode(ic, RelocInfo::CODE_TARGET, instr, NEVER_INLINE_TARGET_ADDRESS);
 }
 
 
 void LCodeGen::DoTransitionElementsKind(LTransitionElementsKind* instr) {
   Register object_reg = ToRegister(instr->object());
-  Register new_map_reg = ToRegister(instr->new_map_reg());
+  Register new_map_reg = ToRegister(instr->new_map_temp());
   Register scratch = scratch0();
 
   Handle<Map> from_map = instr->original_map();
@@ -4144,7 +4318,7 @@ void LCodeGen::DoTransitionElementsKind(LTransitionElementsKind* instr) {
                         scratch, kLRHasBeenSaved, kDontSaveFPRegs);
   } else if (IsFastSmiElementsKind(from_kind) &&
              IsFastDoubleElementsKind(to_kind)) {
-    Register fixed_object_reg = ToRegister(instr->temp_reg());
+    Register fixed_object_reg = ToRegister(instr->temp());
     ASSERT(fixed_object_reg.is(r2));
     ASSERT(new_map_reg.is(r3));
     __ mov(fixed_object_reg, object_reg);
@@ -4152,7 +4326,7 @@ void LCodeGen::DoTransitionElementsKind(LTransitionElementsKind* instr) {
              RelocInfo::CODE_TARGET, instr);
   } else if (IsFastDoubleElementsKind(from_kind) &&
              IsFastObjectElementsKind(to_kind)) {
-    Register fixed_object_reg = ToRegister(instr->temp_reg());
+    Register fixed_object_reg = ToRegister(instr->temp());
     ASSERT(fixed_object_reg.is(r2));
     ASSERT(new_map_reg.is(r3));
     __ mov(fixed_object_reg, object_reg);
@@ -4220,9 +4394,7 @@ void LCodeGen::DoDeferredStringCharCodeAt(LStringCharCodeAt* instr) {
     __ push(index);
   }
   CallRuntimeFromDeferred(Runtime::kStringCharCodeAt, 2, instr);
-  if (FLAG_debug_code) {
-    __ AbortIfNotSmi(r0);
-  }
+  __ AssertSmi(r0);
   __ SmiUntag(r0);
   __ StoreToSafepointRegisterSlot(r0, result);
 }
@@ -4277,14 +4449,14 @@ void LCodeGen::DoDeferredStringCharFromCode(LStringCharFromCode* instr) {
 
 
 void LCodeGen::DoStringLength(LStringLength* instr) {
-  Register string = ToRegister(instr->InputAt(0));
+  Register string = ToRegister(instr->string());
   Register result = ToRegister(instr->result());
   __ ldr(result, FieldMemOperand(string, String::kLengthOffset));
 }
 
 
 void LCodeGen::DoInteger32ToDouble(LInteger32ToDouble* instr) {
-  LOperand* input = instr->InputAt(0);
+  LOperand* input = instr->value();
   ASSERT(input->IsRegister() || input->IsStackSlot());
   LOperand* output = instr->result();
   ASSERT(output->IsDoubleRegister());
@@ -4301,7 +4473,7 @@ void LCodeGen::DoInteger32ToDouble(LInteger32ToDouble* instr) {
 
 
 void LCodeGen::DoUint32ToDouble(LUint32ToDouble* instr) {
-  LOperand* input = instr->InputAt(0);
+  LOperand* input = instr->value();
   LOperand* output = instr->result();
 
   SwVfpRegister flt_scratch = double_scratch0().low();
@@ -4317,7 +4489,7 @@ void LCodeGen::DoNumberTagI(LNumberTagI* instr) {
         : LDeferredCode(codegen), instr_(instr) { }
     virtual void Generate() {
       codegen()->DoDeferredNumberTagI(instr_,
-                                      instr_->InputAt(0),
+                                      instr_->value(),
                                       SIGNED_INT32);
     }
     virtual LInstruction* instr() { return instr_; }
@@ -4325,7 +4497,7 @@ void LCodeGen::DoNumberTagI(LNumberTagI* instr) {
     LNumberTagI* instr_;
   };
 
-  Register src = ToRegister(instr->InputAt(0));
+  Register src = ToRegister(instr->value());
   Register dst = ToRegister(instr->result());
 
   DeferredNumberTagI* deferred = new(zone()) DeferredNumberTagI(this, instr);
@@ -4342,7 +4514,7 @@ void LCodeGen::DoNumberTagU(LNumberTagU* instr) {
         : LDeferredCode(codegen), instr_(instr) { }
     virtual void Generate() {
       codegen()->DoDeferredNumberTagI(instr_,
-                                      instr_->InputAt(0),
+                                      instr_->value(),
                                       UNSIGNED_INT32);
     }
     virtual LInstruction* instr() { return instr_; }
@@ -4350,7 +4522,7 @@ void LCodeGen::DoNumberTagU(LNumberTagU* instr) {
     LNumberTagU* instr_;
   };
 
-  LOperand* input = instr->InputAt(0);
+  LOperand* input = instr->value();
   ASSERT(input->IsRegister() && input->Equals(instr->result()));
   Register reg = ToRegister(input);
 
@@ -4392,7 +4564,7 @@ void LCodeGen::DoDeferredNumberTagI(LInstruction* instr,
 
   if (FLAG_inline_new) {
     __ LoadRoot(r6, Heap::kHeapNumberMapRootIndex);
-    __ AllocateHeapNumber(r5, r3, r4, r6, &slow);
+    __ AllocateHeapNumber(r5, r3, r4, r6, &slow, DONT_TAG_RESULT);
     __ Move(dst, r5);
     __ b(&done);
   }
@@ -4407,12 +4579,13 @@ void LCodeGen::DoDeferredNumberTagI(LInstruction* instr,
   __ StoreToSafepointRegisterSlot(ip, dst);
   CallRuntimeFromDeferred(Runtime::kAllocateHeapNumber, 0, instr);
   __ Move(dst, r0);
+  __ sub(dst, dst, Operand(kHeapObjectTag));
 
   // Done. Put the value in dbl_scratch into the value of the allocated heap
   // number.
   __ bind(&done);
-  __ sub(ip, dst, Operand(kHeapObjectTag));
-  __ vstr(dbl_scratch, ip, HeapNumber::kValueOffset);
+  __ vstr(dbl_scratch, dst, HeapNumber::kValueOffset);
+  __ add(dst, dst, Operand(kHeapObjectTag));
   __ StoreToSafepointRegisterSlot(dst, dst);
 }
 
@@ -4428,22 +4601,25 @@ void LCodeGen::DoNumberTagD(LNumberTagD* instr) {
     LNumberTagD* instr_;
   };
 
-  DoubleRegister input_reg = ToDoubleRegister(instr->InputAt(0));
+  DoubleRegister input_reg = ToDoubleRegister(instr->value());
   Register scratch = scratch0();
   Register reg = ToRegister(instr->result());
-  Register temp1 = ToRegister(instr->TempAt(0));
-  Register temp2 = ToRegister(instr->TempAt(1));
+  Register temp1 = ToRegister(instr->temp());
+  Register temp2 = ToRegister(instr->temp2());
 
   DeferredNumberTagD* deferred = new(zone()) DeferredNumberTagD(this, instr);
   if (FLAG_inline_new) {
     __ LoadRoot(scratch, Heap::kHeapNumberMapRootIndex);
-    __ AllocateHeapNumber(reg, temp1, temp2, scratch, deferred->entry());
+    // We want the untagged address first for performance
+    __ AllocateHeapNumber(reg, temp1, temp2, scratch, deferred->entry(),
+                          DONT_TAG_RESULT);
   } else {
     __ jmp(deferred->entry());
   }
   __ bind(deferred->exit());
-  __ sub(ip, reg, Operand(kHeapObjectTag));
-  __ vstr(input_reg, ip, HeapNumber::kValueOffset);
+  __ vstr(input_reg, reg, HeapNumber::kValueOffset);
+  // Now that we have finished with the object's real address tag it
+  __ add(reg, reg, Operand(kHeapObjectTag));
 }
 
 
@@ -4456,18 +4632,19 @@ void LCodeGen::DoDeferredNumberTagD(LNumberTagD* instr) {
 
   PushSafepointRegistersScope scope(this, Safepoint::kWithRegisters);
   CallRuntimeFromDeferred(Runtime::kAllocateHeapNumber, 0, instr);
+  __ sub(r0, r0, Operand(kHeapObjectTag));
   __ StoreToSafepointRegisterSlot(r0, reg);
 }
 
 
 void LCodeGen::DoSmiTag(LSmiTag* instr) {
   ASSERT(!instr->hydrogen_value()->CheckFlag(HValue::kCanOverflow));
-  __ SmiTag(ToRegister(instr->result()), ToRegister(instr->InputAt(0)));
+  __ SmiTag(ToRegister(instr->result()), ToRegister(instr->value()));
 }
 
 
 void LCodeGen::DoSmiUntag(LSmiUntag* instr) {
-  Register input = ToRegister(instr->InputAt(0));
+  Register input = ToRegister(instr->value());
   Register result = ToRegister(instr->result());
   if (instr->needs_check()) {
     STATIC_ASSERT(kHeapObjectTag == 1);
@@ -4539,11 +4716,11 @@ void LCodeGen::EmitNumberUntagD(Register input_reg,
 
 
 void LCodeGen::DoDeferredTaggedToI(LTaggedToI* instr) {
-  Register input_reg = ToRegister(instr->InputAt(0));
+  Register input_reg = ToRegister(instr->value());
   Register scratch1 = scratch0();
-  Register scratch2 = ToRegister(instr->TempAt(0));
+  Register scratch2 = ToRegister(instr->temp());
   DwVfpRegister double_scratch = double_scratch0();
-  SwVfpRegister single_scratch = double_scratch.low();
+  DwVfpRegister double_scratch2 = ToDoubleRegister(instr->temp3());
 
   ASSERT(!scratch1.is(input_reg) && !scratch1.is(scratch2));
   ASSERT(!scratch2.is(input_reg) && !scratch2.is(scratch1));
@@ -4562,8 +4739,7 @@ void LCodeGen::DoDeferredTaggedToI(LTaggedToI* instr) {
   __ cmp(scratch1, Operand(ip));
 
   if (instr->truncating()) {
-    Register scratch3 = ToRegister(instr->TempAt(1));
-    DwVfpRegister double_scratch2 = ToDoubleRegister(instr->TempAt(2));
+    Register scratch3 = ToRegister(instr->temp2());
     ASSERT(!scratch3.is(input_reg) &&
            !scratch3.is(scratch1) &&
            !scratch3.is(scratch2));
@@ -4585,7 +4761,7 @@ void LCodeGen::DoDeferredTaggedToI(LTaggedToI* instr) {
 
     __ EmitECMATruncate(input_reg,
                         double_scratch2,
-                        single_scratch,
+                        double_scratch,
                         scratch1,
                         scratch2,
                         scratch3);
@@ -4598,14 +4774,12 @@ void LCodeGen::DoDeferredTaggedToI(LTaggedToI* instr) {
     __ sub(ip, input_reg, Operand(kHeapObjectTag));
     __ vldr(double_scratch, ip, HeapNumber::kValueOffset);
     __ EmitVFPTruncate(kRoundToZero,
-                       single_scratch,
+                       input_reg,
                        double_scratch,
                        scratch1,
-                       scratch2,
+                       double_scratch2,
                        kCheckForInexactConversion);
     DeoptimizeIf(ne, instr->environment());
-    // Load the result.
-    __ vmov(input_reg, single_scratch);
 
     if (instr->hydrogen()->CheckFlag(HValue::kBailoutOnMinusZero)) {
       __ cmp(input_reg, Operand(0));
@@ -4630,7 +4804,7 @@ void LCodeGen::DoTaggedToI(LTaggedToI* instr) {
     LTaggedToI* instr_;
   };
 
-  LOperand* input = instr->InputAt(0);
+  LOperand* input = instr->value();
   ASSERT(input->IsRegister());
   ASSERT(input->Equals(instr->result()));
 
@@ -4649,7 +4823,7 @@ void LCodeGen::DoTaggedToI(LTaggedToI* instr) {
 
 
 void LCodeGen::DoNumberUntagD(LNumberUntagD* instr) {
-  LOperand* input = instr->InputAt(0);
+  LOperand* input = instr->value();
   ASSERT(input->IsRegister());
   LOperand* result = instr->result();
   ASSERT(result->IsDoubleRegister());
@@ -4667,54 +4841,52 @@ void LCodeGen::DoNumberUntagD(LNumberUntagD* instr) {
 void LCodeGen::DoDoubleToI(LDoubleToI* instr) {
   Register result_reg = ToRegister(instr->result());
   Register scratch1 = scratch0();
-  Register scratch2 = ToRegister(instr->TempAt(0));
-  DwVfpRegister double_input = ToDoubleRegister(instr->InputAt(0));
-  SwVfpRegister single_scratch = double_scratch0().low();
+  Register scratch2 = ToRegister(instr->temp());
+  DwVfpRegister double_input = ToDoubleRegister(instr->value());
+  DwVfpRegister double_scratch = double_scratch0();
 
   Label done;
 
   if (instr->truncating()) {
-    Register scratch3 = ToRegister(instr->TempAt(1));
+    Register scratch3 = ToRegister(instr->temp2());
     __ EmitECMATruncate(result_reg,
                         double_input,
-                        single_scratch,
+                        double_scratch,
                         scratch1,
                         scratch2,
                         scratch3);
   } else {
-    VFPRoundingMode rounding_mode = kRoundToMinusInf;
-    __ EmitVFPTruncate(rounding_mode,
-                       single_scratch,
+    __ EmitVFPTruncate(kRoundToMinusInf,
+                       result_reg,
                        double_input,
                        scratch1,
-                       scratch2,
+                       double_scratch,
                        kCheckForInexactConversion);
+
     // Deoptimize if we had a vfp invalid exception,
     // including inexact operation.
     DeoptimizeIf(ne, instr->environment());
-    // Retrieve the result.
-    __ vmov(result_reg, single_scratch);
   }
     __ bind(&done);
 }
 
 
 void LCodeGen::DoCheckSmi(LCheckSmi* instr) {
-  LOperand* input = instr->InputAt(0);
+  LOperand* input = instr->value();
   __ tst(ToRegister(input), Operand(kSmiTagMask));
   DeoptimizeIf(ne, instr->environment());
 }
 
 
 void LCodeGen::DoCheckNonSmi(LCheckNonSmi* instr) {
-  LOperand* input = instr->InputAt(0);
+  LOperand* input = instr->value();
   __ tst(ToRegister(input), Operand(kSmiTagMask));
   DeoptimizeIf(eq, instr->environment());
 }
 
 
 void LCodeGen::DoCheckInstanceType(LCheckInstanceType* instr) {
-  Register input = ToRegister(instr->InputAt(0));
+  Register input = ToRegister(instr->value());
   Register scratch = scratch0();
 
   __ ldr(scratch, FieldMemOperand(input, HeapObject::kMapOffset));
@@ -4787,7 +4959,7 @@ void LCodeGen::DoCheckMapCommon(Register reg,
 
 void LCodeGen::DoCheckMaps(LCheckMaps* instr) {
   Register scratch = scratch0();
-  LOperand* input = instr->InputAt(0);
+  LOperand* input = instr->value();
   ASSERT(input->IsRegister());
   Register reg = ToRegister(input);
 
@@ -4807,7 +4979,7 @@ void LCodeGen::DoCheckMaps(LCheckMaps* instr) {
 void LCodeGen::DoClampDToUint8(LClampDToUint8* instr) {
   DoubleRegister value_reg = ToDoubleRegister(instr->unclamped());
   Register result_reg = ToRegister(instr->result());
-  DoubleRegister temp_reg = ToDoubleRegister(instr->TempAt(0));
+  DoubleRegister temp_reg = ToDoubleRegister(instr->temp());
   __ ClampDoubleToUint8(result_reg, value_reg, temp_reg);
 }
 
@@ -4823,7 +4995,7 @@ void LCodeGen::DoClampTToUint8(LClampTToUint8* instr) {
   Register scratch = scratch0();
   Register input_reg = ToRegister(instr->unclamped());
   Register result_reg = ToRegister(instr->result());
-  DoubleRegister temp_reg = ToDoubleRegister(instr->TempAt(0));
+  DoubleRegister temp_reg = ToDoubleRegister(instr->temp());
   Label is_smi, done, heap_number;
 
   // Both smi and heap number cases are handled.
@@ -4857,8 +5029,9 @@ void LCodeGen::DoClampTToUint8(LClampTToUint8* instr) {
 
 
 void LCodeGen::DoCheckPrototypeMaps(LCheckPrototypeMaps* instr) {
-  Register temp1 = ToRegister(instr->TempAt(0));
-  Register temp2 = ToRegister(instr->TempAt(1));
+  ASSERT(instr->temp()->Equals(instr->result()));
+  Register temp1 = ToRegister(instr->temp());
+  Register temp2 = ToRegister(instr->temp2());
 
   Handle<JSObject> holder = instr->holder();
   Handle<JSObject> current_prototype = instr->prototype();
@@ -4881,7 +5054,6 @@ void LCodeGen::DoCheckPrototypeMaps(LCheckPrototypeMaps* instr) {
   DoCheckMapCommon(temp1, temp2,
                    Handle<Map>(current_prototype->map()),
                    ALLOW_ELEMENT_TRANSITION_MAPS, instr->environment());
-  DeoptimizeIf(ne, instr->environment());
 }
 
 
@@ -4900,8 +5072,8 @@ void LCodeGen::DoAllocateObject(LAllocateObject* instr) {
       new(zone()) DeferredAllocateObject(this, instr);
 
   Register result = ToRegister(instr->result());
-  Register scratch = ToRegister(instr->TempAt(0));
-  Register scratch2 = ToRegister(instr->TempAt(1));
+  Register scratch = ToRegister(instr->temp());
+  Register scratch2 = ToRegister(instr->temp2());
   Handle<JSFunction> constructor = instr->hydrogen()->constructor();
   Handle<Map> initial_map(constructor->initial_map());
   int instance_size = initial_map->instance_size();
@@ -5193,7 +5365,7 @@ void LCodeGen::DoObjectLiteral(LObjectLiteral* instr) {
 
 
 void LCodeGen::DoToFastProperties(LToFastProperties* instr) {
-  ASSERT(ToRegister(instr->InputAt(0)).is(r0));
+  ASSERT(ToRegister(instr->value()).is(r0));
   __ push(r0);
   CallRuntime(Runtime::kToFastProperties, 1, instr);
 }
@@ -5274,14 +5446,14 @@ void LCodeGen::DoFunctionLiteral(LFunctionLiteral* instr) {
 
 
 void LCodeGen::DoTypeof(LTypeof* instr) {
-  Register input = ToRegister(instr->InputAt(0));
+  Register input = ToRegister(instr->value());
   __ push(input);
   CallRuntime(Runtime::kTypeof, 1, instr);
 }
 
 
 void LCodeGen::DoTypeofIsAndBranch(LTypeofIsAndBranch* instr) {
-  Register input = ToRegister(instr->InputAt(0));
+  Register input = ToRegister(instr->value());
   int true_block = chunk_->LookupDestination(instr->true_block_id());
   int false_block = chunk_->LookupDestination(instr->false_block_id());
   Label* true_label = chunk_->GetAssemblyLabel(true_block);
@@ -5371,7 +5543,7 @@ Condition LCodeGen::EmitTypeofIs(Label* true_label,
 
 
 void LCodeGen::DoIsConstructCallAndBranch(LIsConstructCallAndBranch* instr) {
-  Register temp1 = ToRegister(instr->TempAt(0));
+  Register temp1 = ToRegister(instr->temp());
   int true_block = chunk_->LookupDestination(instr->true_block_id());
   int false_block = chunk_->LookupDestination(instr->false_block_id());
 
@@ -5492,6 +5664,7 @@ void LCodeGen::DoStackCheck(LStackCheck* instr) {
     __ cmp(sp, Operand(ip));
     __ b(hs, &done);
     StackCheckStub stub;
+    PredictableCodeSizeScope predictable(masm_, 2 * Assembler::kInstrSize);
     CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr);
     EnsureSpaceForLazyDeopt();
     __ bind(&done);
@@ -5572,7 +5745,6 @@ void LCodeGen::DoForInPrepareMap(LForInPrepareMap* instr) {
 void LCodeGen::DoForInCacheArray(LForInCacheArray* instr) {
   Register map = ToRegister(instr->map());
   Register result = ToRegister(instr->result());
-  Register scratch = ToRegister(instr->scratch());
   Label load_cache, done;
   __ EnumLength(result, map);
   __ cmp(result, Operand(Smi::FromInt(0)));
@@ -5581,7 +5753,7 @@ void LCodeGen::DoForInCacheArray(LForInCacheArray* instr) {
   __ jmp(&done);
 
   __ bind(&load_cache);
-  __ LoadInstanceDescriptors(map, result, scratch);
+  __ LoadInstanceDescriptors(map, result);
   __ ldr(result,
          FieldMemOperand(result, DescriptorArray::kEnumCacheOffset));
   __ ldr(result,
diff --git a/deps/v8/src/arm/lithium-codegen-arm.h b/deps/v8/src/arm/lithium-codegen-arm.h
index fd4a2a5ca7..921285b0d2 100644
--- a/deps/v8/src/arm/lithium-codegen-arm.h
+++ b/deps/v8/src/arm/lithium-codegen-arm.h
@@ -110,8 +110,9 @@ class LCodeGen BASE_EMBEDDED {
   void FinishCode(Handle<Code> code);
 
   // Deferred code support.
-  template<int T>
-  void DoDeferredBinaryOpStub(LTemplateInstruction<1, 2, T>* instr,
+  void DoDeferredBinaryOpStub(LPointerMap* pointer_map,
+                              LOperand* left_argument,
+                              LOperand* right_argument,
                               Token::Value op);
   void DoDeferredNumberTagD(LNumberTagD* instr);
 
@@ -147,7 +148,10 @@ class LCodeGen BASE_EMBEDDED {
                                  int additional_offset);
 
   // Emit frame translation commands for an environment.
-  void WriteTranslation(LEnvironment* environment, Translation* translation);
+  void WriteTranslation(LEnvironment* environment,
+                        Translation* translation,
+                        int* arguments_index,
+                        int* arguments_count);
 
   // Declare methods that deal with the individual node types.
 #define DECLARE_DO(type) void Do##type(L##type* node);
@@ -209,14 +213,18 @@ class LCodeGen BASE_EMBEDDED {
     RECORD_SAFEPOINT_WITH_REGISTERS_AND_NO_ARGUMENTS
   };
 
-  void CallCode(Handle<Code> code,
-                RelocInfo::Mode mode,
-                LInstruction* instr);
+  void CallCode(
+      Handle<Code> code,
+      RelocInfo::Mode mode,
+      LInstruction* instr,
+      TargetAddressStorageMode storage_mode = CAN_INLINE_TARGET_ADDRESS);
 
-  void CallCodeGeneric(Handle<Code> code,
-                       RelocInfo::Mode mode,
-                       LInstruction* instr,
-                       SafepointMode safepoint_mode);
+  void CallCodeGeneric(
+      Handle<Code> code,
+      RelocInfo::Mode mode,
+      LInstruction* instr,
+      SafepointMode safepoint_mode,
+      TargetAddressStorageMode storage_mode = CAN_INLINE_TARGET_ADDRESS);
 
   void CallRuntime(const Runtime::Function* function,
                    int num_arguments,
@@ -258,7 +266,9 @@ class LCodeGen BASE_EMBEDDED {
   void AddToTranslation(Translation* translation,
                         LOperand* op,
                         bool is_tagged,
-                        bool is_uint32);
+                        bool is_uint32,
+                        int arguments_index,
+                        int arguments_count);
   void PopulateDeoptimizationData(Handle<Code> code);
   int DefineDeoptimizationLiteral(Handle<Object> literal);
 
@@ -367,6 +377,12 @@ class LCodeGen BASE_EMBEDDED {
   };
 
   void EnsureSpaceForLazyDeopt();
+  void DoLoadKeyedExternalArray(LLoadKeyed* instr);
+  void DoLoadKeyedFixedDoubleArray(LLoadKeyed* instr);
+  void DoLoadKeyedFixedArray(LLoadKeyed* instr);
+  void DoStoreKeyedExternalArray(LStoreKeyed* instr);
+  void DoStoreKeyedFixedDoubleArray(LStoreKeyed* instr);
+  void DoStoreKeyedFixedArray(LStoreKeyed* instr);
 
   Zone* zone_;
   LPlatformChunk* const chunk_;
diff --git a/deps/v8/src/arm/macro-assembler-arm.cc b/deps/v8/src/arm/macro-assembler-arm.cc
index 2a677be525..dc1dc1da9b 100644
--- a/deps/v8/src/arm/macro-assembler-arm.cc
+++ b/deps/v8/src/arm/macro-assembler-arm.cc
@@ -108,7 +108,7 @@ void MacroAssembler::Jump(Handle<Code> code, RelocInfo::Mode rmode,
 
 
 int MacroAssembler::CallSize(Register target, Condition cond) {
-#if USE_BLX
+#ifdef USE_BLX
   return kInstrSize;
 #else
   return 2 * kInstrSize;
@@ -121,7 +121,7 @@ void MacroAssembler::Call(Register target, Condition cond) {
   BlockConstPoolScope block_const_pool(this);
   Label start;
   bind(&start);
-#if USE_BLX
+#ifdef USE_BLX
   blx(target, cond);
 #else
   // set lr for return at current pc + 8
@@ -158,15 +158,29 @@ int MacroAssembler::CallSizeNotPredictableCodeSize(
 
 void MacroAssembler::Call(Address target,
                           RelocInfo::Mode rmode,
-                          Condition cond) {
+                          Condition cond,
+                          TargetAddressStorageMode mode) {
   // Block constant pool for the call instruction sequence.
   BlockConstPoolScope block_const_pool(this);
   Label start;
   bind(&start);
-#if USE_BLX
-  // On ARMv5 and after the recommended call sequence is:
-  //  ldr ip, [pc, #...]
-  //  blx ip
+
+  bool old_predictable_code_size = predictable_code_size();
+  if (mode == NEVER_INLINE_TARGET_ADDRESS) {
+    set_predictable_code_size(true);
+  }
+
+#ifdef USE_BLX
+  // Call sequence on V7 or later may be :
+  //  movw  ip, #... @ call address low 16
+  //  movt  ip, #... @ call address high 16
+  //  blx   ip
+  //                      @ return address
+  // Or for pre-V7 or values that may be back-patched
+  // to avoid ICache flushes:
+  //  ldr   ip, [pc, #...] @ call address
+  //  blx   ip
+  //                      @ return address
 
   // Statement positions are expected to be recorded when the target
   // address is loaded. The mov method will automatically record
@@ -177,15 +191,16 @@ void MacroAssembler::Call(Address target,
   mov(ip, Operand(reinterpret_cast<int32_t>(target), rmode));
   blx(ip, cond);
 
-  ASSERT(kCallTargetAddressOffset == 2 * kInstrSize);
 #else
   // Set lr for return at current pc + 8.
   mov(lr, Operand(pc), LeaveCC, cond);
   // Emit a ldr<cond> pc, [pc + offset of target in constant pool].
   mov(pc, Operand(reinterpret_cast<int32_t>(target), rmode), LeaveCC, cond);
-  ASSERT(kCallTargetAddressOffset == kInstrSize);
 #endif
   ASSERT_EQ(CallSize(target, rmode, cond), SizeOfCodeGeneratedSince(&start));
+  if (mode == NEVER_INLINE_TARGET_ADDRESS) {
+    set_predictable_code_size(old_predictable_code_size);
+  }
 }
 
 
@@ -200,7 +215,8 @@ int MacroAssembler::CallSize(Handle<Code> code,
 void MacroAssembler::Call(Handle<Code> code,
                           RelocInfo::Mode rmode,
                           TypeFeedbackId ast_id,
-                          Condition cond) {
+                          Condition cond,
+                          TargetAddressStorageMode mode) {
   Label start;
   bind(&start);
   ASSERT(RelocInfo::IsCodeTarget(rmode));
@@ -209,9 +225,7 @@ void MacroAssembler::Call(Handle<Code> code,
     rmode = RelocInfo::CODE_TARGET_WITH_ID;
   }
   // 'code' is always generated ARM code, never THUMB code
-  Call(reinterpret_cast<Address>(code.location()), rmode, cond);
-  ASSERT_EQ(CallSize(code, rmode, ast_id, cond),
-            SizeOfCodeGeneratedSince(&start));
+  Call(reinterpret_cast<Address>(code.location()), rmode, cond, mode);
 }
 
 
@@ -288,17 +302,15 @@ void MacroAssembler::Move(DoubleRegister dst, DoubleRegister src) {
 void MacroAssembler::And(Register dst, Register src1, const Operand& src2,
                          Condition cond) {
   if (!src2.is_reg() &&
-      !src2.must_use_constant_pool(this) &&
+      !src2.must_output_reloc_info(this) &&
       src2.immediate() == 0) {
     mov(dst, Operand(0, RelocInfo::NONE), LeaveCC, cond);
-
   } else if (!src2.is_single_instruction(this) &&
-             !src2.must_use_constant_pool(this) &&
+             !src2.must_output_reloc_info(this) &&
              CpuFeatures::IsSupported(ARMv7) &&
              IsPowerOf2(src2.immediate() + 1)) {
     ubfx(dst, src1, 0,
         WhichPowerOf2(static_cast<uint32_t>(src2.immediate()) + 1), cond);
-
   } else {
     and_(dst, src1, src2, LeaveCC, cond);
   }
@@ -363,12 +375,14 @@ void MacroAssembler::Bfi(Register dst,
 }
 
 
-void MacroAssembler::Bfc(Register dst, int lsb, int width, Condition cond) {
+void MacroAssembler::Bfc(Register dst, Register src, int lsb, int width,
+                         Condition cond) {
   ASSERT(lsb < 32);
   if (!CpuFeatures::IsSupported(ARMv7) || predictable_code_size()) {
     int mask = (1 << (width + lsb)) - 1 - ((1 << lsb) - 1);
-    bic(dst, dst, Operand(mask));
+    bic(dst, src, Operand(mask));
   } else {
+    Move(dst, src, cond);
     bfc(dst, lsb, width, cond);
   }
 }
@@ -408,6 +422,17 @@ void MacroAssembler::Usat(Register dst, int satpos, const Operand& src,
 void MacroAssembler::LoadRoot(Register destination,
                               Heap::RootListIndex index,
                               Condition cond) {
+  if (CpuFeatures::IsSupported(MOVW_MOVT_IMMEDIATE_LOADS) &&
+      !Heap::RootCanBeWrittenAfterInitialization(index) &&
+      !predictable_code_size()) {
+    Handle<Object> root(isolate()->heap()->roots_array_start()[index]);
+    if (!isolate()->heap()->InNewSpace(*root)) {
+      // The CPU supports fast immediate values, and this root will never
+      // change. We will load it as a relocatable immediate value.
+      mov(destination, Operand(root), LeaveCC, cond);
+      return;
+    }
+  }
   ldr(destination, MemOperand(kRootRegister, index << kPointerSizeLog2), cond);
 }
 
@@ -789,6 +814,7 @@ void MacroAssembler::VFPCompareAndLoadFlags(const DwVfpRegister src1,
 
 void MacroAssembler::Vmov(const DwVfpRegister dst,
                           const double imm,
+                          const Register scratch,
                           const Condition cond) {
   ASSERT(CpuFeatures::IsEnabled(VFP2));
   static const DoubleRepresentation minus_zero(-0.0);
@@ -800,7 +826,7 @@ void MacroAssembler::Vmov(const DwVfpRegister dst,
   } else if (value.bits == minus_zero.bits) {
     vneg(dst, kDoubleRegZero, cond);
   } else {
-    vmov(dst, imm, cond);
+    vmov(dst, imm, scratch, cond);
   }
 }
 
@@ -1567,7 +1593,11 @@ void MacroAssembler::AllocateInNewSpace(int object_size,
   Register topaddr = scratch1;
   Register obj_size_reg = scratch2;
   mov(topaddr, Operand(new_space_allocation_top));
-  mov(obj_size_reg, Operand(object_size));
+  Operand obj_size_operand = Operand(object_size);
+  if (!obj_size_operand.is_single_instruction(this)) {
+    // We are about to steal IP, so we need to load this value first
+    mov(obj_size_reg, obj_size_operand);
+  }
 
   // This code stores a temporary value in ip. This is OK, as the code below
   // does not need ip for implicit literal generation.
@@ -1589,7 +1619,13 @@ void MacroAssembler::AllocateInNewSpace(int object_size,
 
   // Calculate new top and bail out if new space is exhausted. Use result
   // to calculate the new top.
-  add(scratch2, result, Operand(obj_size_reg), SetCC);
+  if (obj_size_operand.is_single_instruction(this)) {
+    // We can add the size as an immediate
+    add(scratch2, result, obj_size_operand, SetCC);
+  } else {
+    // Doesn't fit in an immediate, we have to use the register
+    add(scratch2, result, obj_size_reg, SetCC);
+  }
   b(cs, gc_required);
   cmp(scratch2, Operand(ip));
   b(hi, gc_required);
@@ -1751,10 +1787,10 @@ void MacroAssembler::AllocateAsciiString(Register result,
                                          Label* gc_required) {
   // Calculate the number of bytes needed for the characters in the string while
   // observing object alignment.
-  ASSERT((SeqAsciiString::kHeaderSize & kObjectAlignmentMask) == 0);
+  ASSERT((SeqOneByteString::kHeaderSize & kObjectAlignmentMask) == 0);
   ASSERT(kCharSize == 1);
   add(scratch1, length,
-      Operand(kObjectAlignmentMask + SeqAsciiString::kHeaderSize));
+      Operand(kObjectAlignmentMask + SeqOneByteString::kHeaderSize));
   and_(scratch1, scratch1, Operand(~kObjectAlignmentMask));
 
   // Allocate ASCII string in new space.
@@ -1920,13 +1956,13 @@ void MacroAssembler::CheckFastSmiElements(Register map,
 
 void MacroAssembler::StoreNumberToDoubleElements(Register value_reg,
                                                  Register key_reg,
-                                                 Register receiver_reg,
                                                  Register elements_reg,
                                                  Register scratch1,
                                                  Register scratch2,
                                                  Register scratch3,
                                                  Register scratch4,
-                                                 Label* fail) {
+                                                 Label* fail,
+                                                 int elements_offset) {
   Label smi_value, maybe_nan, have_double_value, is_nan, done;
   Register mantissa_reg = scratch2;
   Register exponent_reg = scratch3;
@@ -1953,8 +1989,10 @@ void MacroAssembler::StoreNumberToDoubleElements(Register value_reg,
   bind(&have_double_value);
   add(scratch1, elements_reg,
       Operand(key_reg, LSL, kDoubleSizeLog2 - kSmiTagSize));
-  str(mantissa_reg, FieldMemOperand(scratch1, FixedDoubleArray::kHeaderSize));
-  uint32_t offset = FixedDoubleArray::kHeaderSize + sizeof(kHoleNanLower32);
+  str(mantissa_reg, FieldMemOperand(
+      scratch1, FixedDoubleArray::kHeaderSize - elements_offset));
+  uint32_t offset = FixedDoubleArray::kHeaderSize - elements_offset +
+      sizeof(kHoleNanLower32);
   str(exponent_reg, FieldMemOperand(scratch1, offset));
   jmp(&done);
 
@@ -1975,7 +2013,8 @@ void MacroAssembler::StoreNumberToDoubleElements(Register value_reg,
 
   bind(&smi_value);
   add(scratch1, elements_reg,
-      Operand(FixedDoubleArray::kHeaderSize - kHeapObjectTag));
+      Operand(FixedDoubleArray::kHeaderSize - kHeapObjectTag -
+              elements_offset));
   add(scratch1, scratch1,
       Operand(key_reg, LSL, kDoubleSizeLog2 - kSmiTagSize));
   // scratch1 is now effective address of the double element
@@ -1987,7 +2026,7 @@ void MacroAssembler::StoreNumberToDoubleElements(Register value_reg,
     destination = FloatingPointHelper::kCoreRegisters;
   }
 
-  Register untagged_value = receiver_reg;
+  Register untagged_value = elements_reg;
   SmiUntag(untagged_value, value_reg);
   FloatingPointHelper::ConvertIntToDouble(this,
                                           untagged_value,
@@ -2184,12 +2223,28 @@ void MacroAssembler::CallApiFunctionAndReturn(ExternalReference function,
   add(r6, r6, Operand(1));
   str(r6, MemOperand(r7, kLevelOffset));
 
+  if (FLAG_log_timer_events) {
+    FrameScope frame(this, StackFrame::MANUAL);
+    PushSafepointRegisters();
+    PrepareCallCFunction(0, r0);
+    CallCFunction(ExternalReference::log_enter_external_function(isolate()), 0);
+    PopSafepointRegisters();
+  }
+
   // Native call returns to the DirectCEntry stub which redirects to the
   // return address pushed on stack (could have moved after GC).
   // DirectCEntry stub itself is generated early and never moves.
   DirectCEntryStub stub;
   stub.GenerateCall(this, function);
 
+  if (FLAG_log_timer_events) {
+    FrameScope frame(this, StackFrame::MANUAL);
+    PushSafepointRegisters();
+    PrepareCallCFunction(0, r0);
+    CallCFunction(ExternalReference::log_leave_external_function(isolate()), 0);
+    PopSafepointRegisters();
+  }
+
   Label promote_scheduled_exception;
   Label delete_allocated_handles;
   Label leave_exit_frame;
@@ -2435,17 +2490,38 @@ void MacroAssembler::ConvertToInt32(Register source,
 }
 
 
+void MacroAssembler::TryFastDoubleToInt32(Register result,
+                                          DwVfpRegister double_input,
+                                          DwVfpRegister double_scratch,
+                                          Label* done) {
+  ASSERT(!double_input.is(double_scratch));
+
+  vcvt_s32_f64(double_scratch.low(), double_input);
+  vmov(result, double_scratch.low());
+  vcvt_f64_s32(double_scratch, double_scratch.low());
+  VFPCompareAndSetFlags(double_input, double_scratch);
+  b(eq, done);
+}
+
+
 void MacroAssembler::EmitVFPTruncate(VFPRoundingMode rounding_mode,
-                                     SwVfpRegister result,
+                                     Register result,
                                      DwVfpRegister double_input,
-                                     Register scratch1,
-                                     Register scratch2,
+                                     Register scratch,
+                                     DwVfpRegister double_scratch,
                                      CheckForInexactConversion check_inexact) {
+  ASSERT(!result.is(scratch));
+  ASSERT(!double_input.is(double_scratch));
+
   ASSERT(CpuFeatures::IsSupported(VFP2));
   CpuFeatures::Scope scope(VFP2);
-  Register prev_fpscr = scratch1;
-  Register scratch = scratch2;
+  Register prev_fpscr = result;
+  Label done;
+
+  // Test for values that can be exactly represented as a signed 32-bit integer.
+  TryFastDoubleToInt32(result, double_input, double_scratch, &done);
 
+  // Convert to integer, respecting rounding mode.
   int32_t check_inexact_conversion =
     (check_inexact == kCheckForInexactConversion) ? kVFPInexactExceptionBit : 0;
 
@@ -2467,7 +2543,7 @@ void MacroAssembler::EmitVFPTruncate(VFPRoundingMode rounding_mode,
   vmsr(scratch);
 
   // Convert the argument to an integer.
-  vcvt_s32_f64(result,
+  vcvt_s32_f64(double_scratch.low(),
                double_input,
                (rounding_mode == kRoundToZero) ? kDefaultRoundToZero
                                                : kFPSCRRounding);
@@ -2476,8 +2552,12 @@ void MacroAssembler::EmitVFPTruncate(VFPRoundingMode rounding_mode,
   vmrs(scratch);
   // Restore FPSCR.
   vmsr(prev_fpscr);
+  // Move the converted value into the result register.
+  vmov(result, double_scratch.low());
   // Check for vfp exceptions.
   tst(scratch, Operand(kVFPExceptionMask | check_inexact_conversion));
+
+  bind(&done);
 }
 
 
@@ -2556,7 +2636,7 @@ void MacroAssembler::EmitOutOfInt32RangeTruncate(Register result,
 
 void MacroAssembler::EmitECMATruncate(Register result,
                                       DwVfpRegister double_input,
-                                      SwVfpRegister single_scratch,
+                                      DwVfpRegister double_scratch,
                                       Register scratch,
                                       Register input_high,
                                       Register input_low) {
@@ -2567,16 +2647,18 @@ void MacroAssembler::EmitECMATruncate(Register result,
   ASSERT(!scratch.is(result) &&
          !scratch.is(input_high) &&
          !scratch.is(input_low));
-  ASSERT(!single_scratch.is(double_input.low()) &&
-         !single_scratch.is(double_input.high()));
+  ASSERT(!double_input.is(double_scratch));
 
   Label done;
 
+  // Test for values that can be exactly represented as a signed 32-bit integer.
+  TryFastDoubleToInt32(result, double_input, double_scratch, &done);
+
   // Clear cumulative exception flags.
   ClearFPSCRBits(kVFPExceptionMask, scratch);
   // Try a conversion to a signed integer.
-  vcvt_s32_f64(single_scratch, double_input);
-  vmov(result, single_scratch);
+  vcvt_s32_f64(double_scratch.low(), double_input);
+  vmov(result, double_scratch.low());
   // Retrieve he FPSCR.
   vmrs(scratch);
   // Check for overflow and NaNs.
@@ -3017,38 +3099,46 @@ void MacroAssembler::JumpIfEitherSmi(Register reg1,
 }
 
 
-void MacroAssembler::AbortIfSmi(Register object) {
-  STATIC_ASSERT(kSmiTag == 0);
-  tst(object, Operand(kSmiTagMask));
-  Assert(ne, "Operand is a smi");
+void MacroAssembler::AssertNotSmi(Register object) {
+  if (emit_debug_code()) {
+    STATIC_ASSERT(kSmiTag == 0);
+    tst(object, Operand(kSmiTagMask));
+    Check(ne, "Operand is a smi");
+  }
 }
 
 
-void MacroAssembler::AbortIfNotSmi(Register object) {
-  STATIC_ASSERT(kSmiTag == 0);
-  tst(object, Operand(kSmiTagMask));
-  Assert(eq, "Operand is not smi");
+void MacroAssembler::AssertSmi(Register object) {
+  if (emit_debug_code()) {
+    STATIC_ASSERT(kSmiTag == 0);
+    tst(object, Operand(kSmiTagMask));
+    Check(eq, "Operand is not smi");
+  }
 }
 
 
-void MacroAssembler::AbortIfNotString(Register object) {
-  STATIC_ASSERT(kSmiTag == 0);
-  tst(object, Operand(kSmiTagMask));
-  Assert(ne, "Operand is not a string");
-  push(object);
-  ldr(object, FieldMemOperand(object, HeapObject::kMapOffset));
-  CompareInstanceType(object, object, FIRST_NONSTRING_TYPE);
-  pop(object);
-  Assert(lo, "Operand is not a string");
+void MacroAssembler::AssertString(Register object) {
+  if (emit_debug_code()) {
+    STATIC_ASSERT(kSmiTag == 0);
+    tst(object, Operand(kSmiTagMask));
+    Check(ne, "Operand is a smi and not a string");
+    push(object);
+    ldr(object, FieldMemOperand(object, HeapObject::kMapOffset));
+    CompareInstanceType(object, object, FIRST_NONSTRING_TYPE);
+    pop(object);
+    Check(lo, "Operand is not a string");
+  }
 }
 
 
 
-void MacroAssembler::AbortIfNotRootValue(Register src,
-                                         Heap::RootListIndex root_value_index,
-                                         const char* message) {
-  CompareRoot(src, root_value_index);
-  Assert(eq, message);
+void MacroAssembler::AssertRootValue(Register src,
+                                     Heap::RootListIndex root_value_index,
+                                     const char* message) {
+  if (emit_debug_code()) {
+    CompareRoot(src, root_value_index);
+    Check(eq, message);
+  }
 }
 
 
@@ -3106,7 +3196,8 @@ void MacroAssembler::AllocateHeapNumber(Register result,
                                         Register scratch1,
                                         Register scratch2,
                                         Register heap_number_map,
-                                        Label* gc_required) {
+                                        Label* gc_required,
+                                        TaggingMode tagging_mode) {
   // Allocate an object in the heap for the heap number and tag it as a heap
   // object.
   AllocateInNewSpace(HeapNumber::kSize,
@@ -3114,11 +3205,16 @@ void MacroAssembler::AllocateHeapNumber(Register result,
                      scratch1,
                      scratch2,
                      gc_required,
-                     TAG_OBJECT);
+                     tagging_mode == TAG_RESULT ? TAG_OBJECT :
+                                                  NO_ALLOCATION_FLAGS);
 
   // Store heap number map in the allocated object.
   AssertRegisterIsRoot(heap_number_map, Heap::kHeapNumberMapRootIndex);
-  str(heap_number_map, FieldMemOperand(result, HeapObject::kMapOffset));
+  if (tagging_mode == TAG_RESULT) {
+    str(heap_number_map, FieldMemOperand(result, HeapObject::kMapOffset));
+  } else {
+    str(heap_number_map, MemOperand(result, HeapObject::kMapOffset));
+  }
 }
 
 
@@ -3189,17 +3285,17 @@ void MacroAssembler::CopyBytes(Register src,
   cmp(length, Operand(kPointerSize));
   b(lt, &byte_loop);
   ldr(scratch, MemOperand(src, kPointerSize, PostIndex));
-#if CAN_USE_UNALIGNED_ACCESSES
-  str(scratch, MemOperand(dst, kPointerSize, PostIndex));
-#else
-  strb(scratch, MemOperand(dst, 1, PostIndex));
-  mov(scratch, Operand(scratch, LSR, 8));
-  strb(scratch, MemOperand(dst, 1, PostIndex));
-  mov(scratch, Operand(scratch, LSR, 8));
-  strb(scratch, MemOperand(dst, 1, PostIndex));
-  mov(scratch, Operand(scratch, LSR, 8));
-  strb(scratch, MemOperand(dst, 1, PostIndex));
-#endif
+  if (CpuFeatures::IsSupported(UNALIGNED_ACCESSES)) {
+    str(scratch, MemOperand(dst, kPointerSize, PostIndex));
+  } else {
+    strb(scratch, MemOperand(dst, 1, PostIndex));
+    mov(scratch, Operand(scratch, LSR, 8));
+    strb(scratch, MemOperand(dst, 1, PostIndex));
+    mov(scratch, Operand(scratch, LSR, 8));
+    strb(scratch, MemOperand(dst, 1, PostIndex));
+    mov(scratch, Operand(scratch, LSR, 8));
+    strb(scratch, MemOperand(dst, 1, PostIndex));
+  }
   sub(length, length, Operand(kPointerSize));
   b(&word_loop);
 
@@ -3274,8 +3370,10 @@ void MacroAssembler::JumpIfBothInstanceTypesAreNotSequentialAscii(
     Register scratch2,
     Label* failure) {
   int kFlatAsciiStringMask =
-      kIsNotStringMask | kStringEncodingMask | kStringRepresentationMask;
+      kIsNotStringMask | kStringEncodingMask | kAsciiDataHintMask |
+      kStringRepresentationMask;
   int kFlatAsciiStringTag = ASCII_STRING_TYPE;
+  ASSERT_EQ(ASCII_STRING_TYPE, ASCII_STRING_TYPE & kFlatAsciiStringMask);
   and_(scratch1, first, Operand(kFlatAsciiStringMask));
   and_(scratch2, second, Operand(kFlatAsciiStringMask));
   cmp(scratch1, Operand(kFlatAsciiStringTag));
@@ -3289,8 +3387,10 @@ void MacroAssembler::JumpIfInstanceTypeIsNotSequentialAscii(Register type,
                                                             Register scratch,
                                                             Label* failure) {
   int kFlatAsciiStringMask =
-      kIsNotStringMask | kStringEncodingMask | kStringRepresentationMask;
+      kIsNotStringMask | kStringEncodingMask | kAsciiDataHintMask |
+      kStringRepresentationMask;
   int kFlatAsciiStringTag = ASCII_STRING_TYPE;
+  ASSERT_EQ(ASCII_STRING_TYPE, ASCII_STRING_TYPE & kFlatAsciiStringMask);
   and_(scratch, type, Operand(kFlatAsciiStringMask));
   cmp(scratch, Operand(kFlatAsciiStringTag));
   b(ne, failure);
@@ -3481,7 +3581,7 @@ void MacroAssembler::CheckPageFlag(
     int mask,
     Condition cc,
     Label* condition_met) {
-  and_(scratch, object, Operand(~Page::kPageAlignmentMask));
+  Bfc(scratch, object, 0, kPageSizeBits);
   ldr(scratch, MemOperand(scratch, MemoryChunk::kFlagsOffset));
   tst(scratch, Operand(mask));
   b(cc, condition_met);
@@ -3630,7 +3730,7 @@ void MacroAssembler::EnsureNotWhite(
   // For ASCII (char-size of 1) we shift the smi tag away to get the length.
   // For UC16 (char-size of 2) we just leave the smi tag in place, thereby
   // getting the length multiplied by 2.
-  ASSERT(kAsciiStringTag == 4 && kStringEncodingMask == 4);
+  ASSERT(kOneByteStringTag == 4 && kStringEncodingMask == 4);
   ASSERT(kSmiTag == 0 && kSmiTagSize == 1);
   ldr(ip, FieldMemOperand(value, String::kLengthOffset));
   tst(instance_type, Operand(kStringEncodingMask));
@@ -3676,7 +3776,7 @@ void MacroAssembler::ClampDoubleToUint8(Register result_reg,
 
   // Double value is >= 255, return 255.
   bind(&above_zero);
-  Vmov(temp_double_reg, 255.0);
+  Vmov(temp_double_reg, 255.0, result_reg);
   VFPCompareAndSetFlags(input_reg, temp_double_reg);
   b(le, &in_bounds);
   mov(result_reg, Operand(255));
@@ -3698,22 +3798,14 @@ void MacroAssembler::ClampDoubleToUint8(Register result_reg,
 
 
 void MacroAssembler::LoadInstanceDescriptors(Register map,
-                                             Register descriptors,
-                                             Register scratch) {
-  Register temp = descriptors;
-  ldr(temp, FieldMemOperand(map, Map::kTransitionsOrBackPointerOffset));
-
-  Label ok, fail;
-  CheckMap(temp,
-           scratch,
-           isolate()->factory()->fixed_array_map(),
-           &fail,
-           DONT_DO_SMI_CHECK);
-  ldr(descriptors, FieldMemOperand(temp, TransitionArray::kDescriptorsOffset));
-  jmp(&ok);
-  bind(&fail);
-  mov(descriptors, Operand(FACTORY->empty_descriptor_array()));
-  bind(&ok);
+                                             Register descriptors) {
+  ldr(descriptors, FieldMemOperand(map, Map::kDescriptorsOffset));
+}
+
+
+void MacroAssembler::NumberOfOwnDescriptors(Register dst, Register map) {
+  ldr(dst, FieldMemOperand(map, Map::kBitField3Offset));
+  DecodeField<Map::NumberOfOwnDescriptorsBits>(dst);
 }
 
 
diff --git a/deps/v8/src/arm/macro-assembler-arm.h b/deps/v8/src/arm/macro-assembler-arm.h
index 8eb97125ea..15cef16f05 100644
--- a/deps/v8/src/arm/macro-assembler-arm.h
+++ b/deps/v8/src/arm/macro-assembler-arm.h
@@ -68,6 +68,13 @@ enum AllocationFlags {
   SIZE_IN_WORDS = 1 << 2
 };
 
+// Flags used for AllocateHeapNumber
+enum TaggingMode {
+  // Tag the result.
+  TAG_RESULT,
+  // Don't tag
+  DONT_TAG_RESULT
+};
 
 // Flags used for the ObjectToDoubleVFPRegister function.
 enum ObjectToDoubleFlags {
@@ -95,6 +102,11 @@ bool AreAliased(Register reg1,
 #endif
 
 
+enum TargetAddressStorageMode {
+  CAN_INLINE_TARGET_ADDRESS,
+  NEVER_INLINE_TARGET_ADDRESS
+};
+
 // MacroAssembler implements a collection of frequently used macros.
 class MacroAssembler: public Assembler {
  public:
@@ -114,7 +126,9 @@ class MacroAssembler: public Assembler {
   static int CallSizeNotPredictableCodeSize(Address target,
                                             RelocInfo::Mode rmode,
                                             Condition cond = al);
-  void Call(Address target, RelocInfo::Mode rmode, Condition cond = al);
+  void Call(Address target, RelocInfo::Mode rmode,
+            Condition cond = al,
+            TargetAddressStorageMode mode = CAN_INLINE_TARGET_ADDRESS);
   int CallSize(Handle<Code> code,
                RelocInfo::Mode rmode = RelocInfo::CODE_TARGET,
                TypeFeedbackId ast_id = TypeFeedbackId::None(),
@@ -122,7 +136,8 @@ class MacroAssembler: public Assembler {
   void Call(Handle<Code> code,
             RelocInfo::Mode rmode = RelocInfo::CODE_TARGET,
             TypeFeedbackId ast_id = TypeFeedbackId::None(),
-            Condition cond = al);
+            Condition cond = al,
+            TargetAddressStorageMode mode = CAN_INLINE_TARGET_ADDRESS);
   void Ret(Condition cond = al);
 
   // Emit code to discard a non-negative number of pointer-sized elements
@@ -154,7 +169,7 @@ class MacroAssembler: public Assembler {
            int lsb,
            int width,
            Condition cond = al);
-  void Bfc(Register dst, int lsb, int width, Condition cond = al);
+  void Bfc(Register dst, Register src, int lsb, int width, Condition cond = al);
   void Usat(Register dst, int satpos, const Operand& src,
             Condition cond = al);
 
@@ -307,6 +322,7 @@ class MacroAssembler: public Assembler {
 
   // Push a handle.
   void Push(Handle<Object> handle);
+  void Push(Smi* smi) { Push(Handle<Smi>(smi)); }
 
   // Push two registers.  Pushes leftmost register first (to highest address).
   void Push(Register src1, Register src2, Condition cond = al) {
@@ -483,6 +499,7 @@ class MacroAssembler: public Assembler {
 
   void Vmov(const DwVfpRegister dst,
             const double imm,
+            const Register scratch = no_reg,
             const Condition cond = al);
 
   // Enter exit frame.
@@ -730,7 +747,8 @@ class MacroAssembler: public Assembler {
                           Register scratch1,
                           Register scratch2,
                           Register heap_number_map,
-                          Label* gc_required);
+                          Label* gc_required,
+                          TaggingMode tagging_mode = TAG_RESULT);
   void AllocateHeapNumberWithValue(Register result,
                                    DwVfpRegister value,
                                    Register scratch1,
@@ -814,13 +832,14 @@ class MacroAssembler: public Assembler {
   // case scratch2, scratch3 and scratch4 are unmodified.
   void StoreNumberToDoubleElements(Register value_reg,
                                    Register key_reg,
-                                   Register receiver_reg,
+                                   // All regs below here overwritten.
                                    Register elements_reg,
                                    Register scratch1,
                                    Register scratch2,
                                    Register scratch3,
                                    Register scratch4,
-                                   Label* fail);
+                                   Label* fail,
+                                   int elements_offset = 0);
 
   // Compare an object's map with the specified map and its transitioned
   // elements maps if mode is ALLOW_ELEMENT_TRANSITION_MAPS. Condition flags are
@@ -875,12 +894,15 @@ class MacroAssembler: public Assembler {
 
   // Load and check the instance type of an object for being a string.
   // Loads the type into the second argument register.
-  // Returns a condition that will be enabled if the object was a string.
+  // Returns a condition that will be enabled if the object was a string
+  // and the passed-in condition passed. If the passed-in condition failed
+  // then flags remain unchanged.
   Condition IsObjectStringType(Register obj,
-                               Register type) {
-    ldr(type, FieldMemOperand(obj, HeapObject::kMapOffset));
-    ldrb(type, FieldMemOperand(type, Map::kInstanceTypeOffset));
-    tst(type, Operand(kIsNotStringMask));
+                               Register type,
+                               Condition cond = al) {
+    ldr(type, FieldMemOperand(obj, HeapObject::kMapOffset), cond);
+    ldrb(type, FieldMemOperand(type, Map::kInstanceTypeOffset), cond);
+    tst(type, Operand(kIsNotStringMask), cond);
     ASSERT_EQ(0, kStringTag);
     return eq;
   }
@@ -937,21 +959,30 @@ class MacroAssembler: public Assembler {
                       DwVfpRegister double_scratch,
                       Label *not_int32);
 
-  // Truncates a double using a specific rounding mode.
+  // Try to convert a double to a signed 32-bit integer. If the double value
+  // can be exactly represented as an integer, the code jumps to 'done' and
+  // 'result' contains the integer value. Otherwise, the code falls through.
+  void TryFastDoubleToInt32(Register result,
+                            DwVfpRegister double_input,
+                            DwVfpRegister double_scratch,
+                            Label* done);
+
+  // Truncates a double using a specific rounding mode, and writes the value
+  // to the result register.
   // Clears the z flag (ne condition) if an overflow occurs.
-  // If exact_conversion is true, the z flag is also cleared if the conversion
-  // was inexact, i.e. if the double value could not be converted exactly
-  // to a 32bit integer.
+  // If kCheckForInexactConversion is passed, the z flag is also cleared if the
+  // conversion was inexact, i.e. if the double value could not be converted
+  // exactly to a 32-bit integer.
   void EmitVFPTruncate(VFPRoundingMode rounding_mode,
-                       SwVfpRegister result,
+                       Register result,
                        DwVfpRegister double_input,
-                       Register scratch1,
-                       Register scratch2,
+                       Register scratch,
+                       DwVfpRegister double_scratch,
                        CheckForInexactConversion check
                            = kDontCheckForInexactConversion);
 
   // Helper for EmitECMATruncate.
-  // This will truncate a floating-point value outside of the singed 32bit
+  // This will truncate a floating-point value outside of the signed 32bit
   // integer range to a 32bit signed integer.
   // Expects the double value loaded in input_high and input_low.
   // Exits with the answer in 'result'.
@@ -966,7 +997,7 @@ class MacroAssembler: public Assembler {
   // Exits with 'result' holding the answer and all other registers clobbered.
   void EmitECMATruncate(Register result,
                         DwVfpRegister double_input,
-                        SwVfpRegister single_scratch,
+                        DwVfpRegister double_scratch,
                         Register scratch,
                         Register scratch2,
                         Register scratch3);
@@ -1183,7 +1214,7 @@ class MacroAssembler: public Assembler {
   // Souce and destination can be the same register.
   void UntagAndJumpIfNotSmi(Register dst, Register src, Label* non_smi_case);
 
-  // Jump the register contains a smi.
+  // Jump if the register contains a smi.
   inline void JumpIfSmi(Register value, Label* smi_label) {
     tst(value, Operand(kSmiTagMask));
     b(eq, smi_label);
@@ -1198,17 +1229,18 @@ class MacroAssembler: public Assembler {
   // Jump if either of the registers contain a smi.
   void JumpIfEitherSmi(Register reg1, Register reg2, Label* on_either_smi);
 
-  // Abort execution if argument is a smi. Used in debug code.
-  void AbortIfSmi(Register object);
-  void AbortIfNotSmi(Register object);
+  // Abort execution if argument is a smi, enabled via --debug-code.
+  void AssertNotSmi(Register object);
+  void AssertSmi(Register object);
 
-  // Abort execution if argument is a string. Used in debug code.
-  void AbortIfNotString(Register object);
+  // Abort execution if argument is a string, enabled via --debug-code.
+  void AssertString(Register object);
 
-  // Abort execution if argument is not the root value with the given index.
-  void AbortIfNotRootValue(Register src,
-                           Heap::RootListIndex root_value_index,
-                           const char* message);
+  // Abort execution if argument is not the root value with the given index,
+  // enabled via --debug-code.
+  void AssertRootValue(Register src,
+                       Heap::RootListIndex root_value_index,
+                       const char* message);
 
   // ---------------------------------------------------------------------------
   // HeapNumber utilities
@@ -1269,10 +1301,17 @@ class MacroAssembler: public Assembler {
                           DoubleRegister temp_double_reg);
 
 
-  void LoadInstanceDescriptors(Register map,
-                               Register descriptors,
-                               Register scratch);
+  void LoadInstanceDescriptors(Register map, Register descriptors);
   void EnumLength(Register dst, Register map);
+  void NumberOfOwnDescriptors(Register dst, Register map);
+
+  template<typename Field>
+  void DecodeField(Register reg) {
+    static const int shift = Field::kShift;
+    static const int mask = (Field::kMask >> shift) << kSmiTagSize;
+    mov(reg, Operand(reg, LSR, shift));
+    and_(reg, reg, Operand(mask));
+  }
 
   // Activation support.
   void EnterFrame(StackFrame::Type type);
diff --git a/deps/v8/src/arm/regexp-macro-assembler-arm.cc b/deps/v8/src/arm/regexp-macro-assembler-arm.cc
index 66cdd8435e..d852d23760 100644
--- a/deps/v8/src/arm/regexp-macro-assembler-arm.cc
+++ b/deps/v8/src/arm/regexp-macro-assembler-arm.cc
@@ -1150,7 +1150,7 @@ int RegExpMacroAssemblerARM::CheckStackGuardState(Address* return_address,
   Handle<String> subject(frame_entry<String*>(re_frame, kInputString));
 
   // Current string.
-  bool is_ascii = subject->IsAsciiRepresentationUnderneath();
+  bool is_ascii = subject->IsOneByteRepresentationUnderneath();
 
   ASSERT(re_code->instruction_start() <= *return_address);
   ASSERT(*return_address <=
@@ -1181,7 +1181,7 @@ int RegExpMacroAssemblerARM::CheckStackGuardState(Address* return_address,
   }
 
   // String might have changed.
-  if (subject_tmp->IsAsciiRepresentation() != is_ascii) {
+  if (subject_tmp->IsOneByteRepresentation() != is_ascii) {
     // If we changed between an ASCII and an UC16 string, the specialized
     // code cannot be used, and we need to restart regexp matching from
     // scratch (including, potentially, compiling a new version of the code).
@@ -1358,6 +1358,11 @@ void RegExpMacroAssemblerARM::CallCFunctionUsingStub(
 }
 
 
+bool RegExpMacroAssemblerARM::CanReadUnaligned() {
+  return CpuFeatures::IsSupported(UNALIGNED_ACCESSES) && !slow_safe();
+}
+
+
 void RegExpMacroAssemblerARM::LoadCurrentCharacterUnchecked(int cp_offset,
                                                             int characters) {
   Register offset = current_input_offset();
@@ -1370,9 +1375,9 @@ void RegExpMacroAssemblerARM::LoadCurrentCharacterUnchecked(int cp_offset,
   // and the operating system running on the target allow it.
   // If unaligned load/stores are not supported then this function must only
   // be used to load a single character at a time.
-#if !V8_TARGET_CAN_READ_UNALIGNED
-  ASSERT(characters == 1);
-#endif
+  if (!CanReadUnaligned()) {
+    ASSERT(characters == 1);
+  }
 
   if (mode_ == ASCII) {
     if (characters == 4) {
diff --git a/deps/v8/src/arm/regexp-macro-assembler-arm.h b/deps/v8/src/arm/regexp-macro-assembler-arm.h
index f723fa212f..c45669ae89 100644
--- a/deps/v8/src/arm/regexp-macro-assembler-arm.h
+++ b/deps/v8/src/arm/regexp-macro-assembler-arm.h
@@ -109,6 +109,7 @@ class RegExpMacroAssemblerARM: public NativeRegExpMacroAssembler {
   virtual void WriteCurrentPositionToRegister(int reg, int cp_offset);
   virtual void ClearRegisters(int reg_from, int reg_to);
   virtual void WriteStackPointerToRegister(int reg);
+  virtual bool CanReadUnaligned();
 
   // Called from RegExp if the stack-guard is triggered.
   // If the code object is relocated, the return address is fixed before
diff --git a/deps/v8/src/arm/simulator-arm.cc b/deps/v8/src/arm/simulator-arm.cc
index a057de58cc..d11e340a9b 100644
--- a/deps/v8/src/arm/simulator-arm.cc
+++ b/deps/v8/src/arm/simulator-arm.cc
@@ -1066,111 +1066,83 @@ void Simulator::TrashCallerSaveRegisters() {
 
 
 int Simulator::ReadW(int32_t addr, Instruction* instr) {
-#if V8_TARGET_CAN_READ_UNALIGNED
-  intptr_t* ptr = reinterpret_cast<intptr_t*>(addr);
-  return *ptr;
-#else
-  if ((addr & 3) == 0) {
+  if (FLAG_enable_unaligned_accesses || (addr & 3) == 0) {
     intptr_t* ptr = reinterpret_cast<intptr_t*>(addr);
     return *ptr;
+  } else {
+    PrintF("Unaligned read at 0x%08x, pc=0x%08" V8PRIxPTR "\n",
+           addr,
+           reinterpret_cast<intptr_t>(instr));
+    UNIMPLEMENTED();
+    return 0;
   }
-  PrintF("Unaligned read at 0x%08x, pc=0x%08" V8PRIxPTR "\n",
-         addr,
-         reinterpret_cast<intptr_t>(instr));
-  UNIMPLEMENTED();
-  return 0;
-#endif
 }
 
 
 void Simulator::WriteW(int32_t addr, int value, Instruction* instr) {
-#if V8_TARGET_CAN_READ_UNALIGNED
-  intptr_t* ptr = reinterpret_cast<intptr_t*>(addr);
-  *ptr = value;
-  return;
-#else
-  if ((addr & 3) == 0) {
+  if (FLAG_enable_unaligned_accesses || (addr & 3) == 0) {
     intptr_t* ptr = reinterpret_cast<intptr_t*>(addr);
     *ptr = value;
-    return;
+  } else {
+    PrintF("Unaligned write at 0x%08x, pc=0x%08" V8PRIxPTR "\n",
+           addr,
+           reinterpret_cast<intptr_t>(instr));
+    UNIMPLEMENTED();
   }
-  PrintF("Unaligned write at 0x%08x, pc=0x%08" V8PRIxPTR "\n",
-         addr,
-         reinterpret_cast<intptr_t>(instr));
-  UNIMPLEMENTED();
-#endif
 }
 
 
 uint16_t Simulator::ReadHU(int32_t addr, Instruction* instr) {
-#if V8_TARGET_CAN_READ_UNALIGNED
-  uint16_t* ptr = reinterpret_cast<uint16_t*>(addr);
-  return *ptr;
-#else
-  if ((addr & 1) == 0) {
+  if (FLAG_enable_unaligned_accesses || (addr & 1) == 0) {
     uint16_t* ptr = reinterpret_cast<uint16_t*>(addr);
     return *ptr;
+  } else {
+    PrintF("Unaligned unsigned halfword read at 0x%08x, pc=0x%08"
+           V8PRIxPTR "\n",
+           addr,
+           reinterpret_cast<intptr_t>(instr));
+    UNIMPLEMENTED();
+    return 0;
   }
-  PrintF("Unaligned unsigned halfword read at 0x%08x, pc=0x%08" V8PRIxPTR "\n",
-         addr,
-         reinterpret_cast<intptr_t>(instr));
-  UNIMPLEMENTED();
-  return 0;
-#endif
 }
 
 
 int16_t Simulator::ReadH(int32_t addr, Instruction* instr) {
-#if V8_TARGET_CAN_READ_UNALIGNED
-  int16_t* ptr = reinterpret_cast<int16_t*>(addr);
-  return *ptr;
-#else
-  if ((addr & 1) == 0) {
+  if (FLAG_enable_unaligned_accesses || (addr & 1) == 0) {
     int16_t* ptr = reinterpret_cast<int16_t*>(addr);
     return *ptr;
+  } else {
+    PrintF("Unaligned signed halfword read at 0x%08x\n", addr);
+    UNIMPLEMENTED();
+    return 0;
   }
-  PrintF("Unaligned signed halfword read at 0x%08x\n", addr);
-  UNIMPLEMENTED();
-  return 0;
-#endif
 }
 
 
 void Simulator::WriteH(int32_t addr, uint16_t value, Instruction* instr) {
-#if V8_TARGET_CAN_READ_UNALIGNED
-  uint16_t* ptr = reinterpret_cast<uint16_t*>(addr);
-  *ptr = value;
-  return;
-#else
-  if ((addr & 1) == 0) {
+  if (FLAG_enable_unaligned_accesses || (addr & 1) == 0) {
     uint16_t* ptr = reinterpret_cast<uint16_t*>(addr);
     *ptr = value;
-    return;
+  } else {
+    PrintF("Unaligned unsigned halfword write at 0x%08x, pc=0x%08"
+           V8PRIxPTR "\n",
+           addr,
+           reinterpret_cast<intptr_t>(instr));
+    UNIMPLEMENTED();
   }
-  PrintF("Unaligned unsigned halfword write at 0x%08x, pc=0x%08" V8PRIxPTR "\n",
-         addr,
-         reinterpret_cast<intptr_t>(instr));
-  UNIMPLEMENTED();
-#endif
 }
 
 
 void Simulator::WriteH(int32_t addr, int16_t value, Instruction* instr) {
-#if V8_TARGET_CAN_READ_UNALIGNED
-  int16_t* ptr = reinterpret_cast<int16_t*>(addr);
-  *ptr = value;
-  return;
-#else
-  if ((addr & 1) == 0) {
+  if (FLAG_enable_unaligned_accesses || (addr & 1) == 0) {
     int16_t* ptr = reinterpret_cast<int16_t*>(addr);
     *ptr = value;
-    return;
+  } else {
+    PrintF("Unaligned halfword write at 0x%08x, pc=0x%08" V8PRIxPTR "\n",
+           addr,
+           reinterpret_cast<intptr_t>(instr));
+    UNIMPLEMENTED();
   }
-  PrintF("Unaligned halfword write at 0x%08x, pc=0x%08" V8PRIxPTR "\n",
-         addr,
-         reinterpret_cast<intptr_t>(instr));
-  UNIMPLEMENTED();
-#endif
 }
 
 
@@ -1199,37 +1171,26 @@ void Simulator::WriteB(int32_t addr, int8_t value) {
 
 
 int32_t* Simulator::ReadDW(int32_t addr) {
-#if V8_TARGET_CAN_READ_UNALIGNED
-  int32_t* ptr = reinterpret_cast<int32_t*>(addr);
-  return ptr;
-#else
-  if ((addr & 3) == 0) {
+  if (FLAG_enable_unaligned_accesses || (addr & 3) == 0) {
     int32_t* ptr = reinterpret_cast<int32_t*>(addr);
     return ptr;
+  } else {
+    PrintF("Unaligned read at 0x%08x\n", addr);
+    UNIMPLEMENTED();
+    return 0;
   }
-  PrintF("Unaligned read at 0x%08x\n", addr);
-  UNIMPLEMENTED();
-  return 0;
-#endif
 }
 
 
 void Simulator::WriteDW(int32_t addr, int32_t value1, int32_t value2) {
-#if V8_TARGET_CAN_READ_UNALIGNED
-  int32_t* ptr = reinterpret_cast<int32_t*>(addr);
-  *ptr++ = value1;
-  *ptr = value2;
-  return;
-#else
-  if ((addr & 3) == 0) {
+  if (FLAG_enable_unaligned_accesses || (addr & 3) == 0) {
     int32_t* ptr = reinterpret_cast<int32_t*>(addr);
     *ptr++ = value1;
     *ptr = value2;
-    return;
+  } else {
+    PrintF("Unaligned write at 0x%08x\n", addr);
+    UNIMPLEMENTED();
   }
-  PrintF("Unaligned write at 0x%08x\n", addr);
-  UNIMPLEMENTED();
-#endif
 }
 
 
@@ -1426,7 +1387,14 @@ int32_t Simulator::GetShiftRm(Instruction* instr, bool* carry_out) {
       }
 
       case ROR: {
-        UNIMPLEMENTED();
+        if (shift_amount == 0) {
+          *carry_out = c_flag_;
+        } else {
+          uint32_t left = static_cast<uint32_t>(result) >> shift_amount;
+          uint32_t right = static_cast<uint32_t>(result) << (32 - shift_amount);
+          result = right | left;
+          *carry_out = (static_cast<uint32_t>(result) >> 31) != 0;
+        }
         break;
       }
 
@@ -1498,7 +1466,14 @@ int32_t Simulator::GetShiftRm(Instruction* instr, bool* carry_out) {
       }
 
       case ROR: {
-        UNIMPLEMENTED();
+        if (shift_amount == 0) {
+          *carry_out = c_flag_;
+        } else {
+          uint32_t left = static_cast<uint32_t>(result) >> shift_amount;
+          uint32_t right = static_cast<uint32_t>(result) << (32 - shift_amount);
+          result = right | left;
+          *carry_out = (static_cast<uint32_t>(result) >> 31) != 0;
+        }
         break;
       }
 
@@ -1986,11 +1961,23 @@ void Simulator::DecodeType01(Instruction* instr) {
               SetNZFlags(alu_out);
             }
           } else {
-            // The MLA instruction description (A 4.1.28) refers to the order
-            // of registers as "Rd, Rm, Rs, Rn". But confusingly it uses the
-            // Rn field to encode the Rd register and the Rd field to encode
-            // the Rn register.
-            Format(instr, "mla'cond's 'rn, 'rm, 'rs, 'rd");
+            int rd = instr->RdValue();
+            int32_t acc_value = get_register(rd);
+            if (instr->Bit(22) == 0) {
+              // The MLA instruction description (A 4.1.28) refers to the order
+              // of registers as "Rd, Rm, Rs, Rn". But confusingly it uses the
+              // Rn field to encode the Rd register and the Rd field to encode
+              // the Rn register.
+              // Format(instr, "mla'cond's 'rn, 'rm, 'rs, 'rd");
+              int32_t mul_out = rm_val * rs_val;
+              int32_t result = acc_value + mul_out;
+              set_register(rn, result);
+            } else {
+              // Format(instr, "mls'cond's 'rn, 'rm, 'rs, 'rd");
+              int32_t mul_out = rm_val * rs_val;
+              int32_t result = acc_value - mul_out;
+              set_register(rn, result);
+            }
           }
         } else {
           // The signed/long multiply instructions use the terms RdHi and RdLo
@@ -2210,6 +2197,8 @@ void Simulator::DecodeType01(Instruction* instr) {
       PrintF("%08x\n", instr->InstructionBits());
       UNIMPLEMENTED();
     }
+  } else if ((type == 1) && instr->IsNopType1()) {
+    // NOP.
   } else {
     int rd = instr->RdValue();
     int rn = instr->RnValue();
@@ -2546,6 +2535,25 @@ void Simulator::DecodeType3(Instruction* instr) {
       break;
     }
     case db_x: {
+      if (FLAG_enable_sudiv) {
+        if (!instr->HasW()) {
+          if (instr->Bits(5, 4) == 0x1) {
+             if ((instr->Bit(22) == 0x0) && (instr->Bit(20) == 0x1)) {
+               // sdiv (in V8 notation matching ARM ISA format) rn = rm/rs
+               // Format(instr, "'sdiv'cond'b 'rn, 'rm, 'rs);
+               int rm = instr->RmValue();
+               int32_t rm_val = get_register(rm);
+               int rs = instr->RsValue();
+               int32_t rs_val = get_register(rs);
+               int32_t ret_val = 0;
+               ASSERT(rs_val != 0);
+               ret_val = rm_val/rs_val;
+               set_register(rn, ret_val);
+               return;
+             }
+           }
+         }
+       }
       // Format(instr, "'memop'cond'b 'rd, ['rn, -'shift_rm]'w");
       addr = rn_val - shifter_operand;
       if (instr->HasW()) {
@@ -2770,6 +2778,20 @@ void Simulator::DecodeTypeVFP(Instruction* instr) {
       double dm_value = get_double_from_d_register(vm);
       double dd_value = dn_value * dm_value;
       set_d_register_from_double(vd, dd_value);
+    } else if ((instr->Opc1Value() == 0x0) && !(instr->Opc3Value() & 0x1)) {
+      // vmla
+      if (instr->SzValue() != 0x1) {
+        UNREACHABLE();  // Not used by V8.
+      }
+
+      double dd_value = get_double_from_d_register(vd);
+      double dn_value = get_double_from_d_register(vn);
+      double dm_value = get_double_from_d_register(vm);
+
+      // Note: we do the mul and add in separate steps to avoid getting a result
+      // with too high precision.
+      set_d_register_from_double(vd, dn_value * dm_value);
+      set_d_register_from_double(vd, get_double_from_d_register(vd) + dd_value);
     } else if ((instr->Opc1Value() == 0x4) && !(instr->Opc3Value() & 0x1)) {
       // vdiv
       if (instr->SzValue() != 0x1) {
@@ -3279,33 +3301,7 @@ void Simulator::Execute() {
 }
 
 
-int32_t Simulator::Call(byte* entry, int argument_count, ...) {
-  va_list parameters;
-  va_start(parameters, argument_count);
-  // Set up arguments
-
-  // First four arguments passed in registers.
-  ASSERT(argument_count >= 4);
-  set_register(r0, va_arg(parameters, int32_t));
-  set_register(r1, va_arg(parameters, int32_t));
-  set_register(r2, va_arg(parameters, int32_t));
-  set_register(r3, va_arg(parameters, int32_t));
-
-  // Remaining arguments passed on stack.
-  int original_stack = get_register(sp);
-  // Compute position of stack on entry to generated code.
-  int entry_stack = (original_stack - (argument_count - 4) * sizeof(int32_t));
-  if (OS::ActivationFrameAlignment() != 0) {
-    entry_stack &= -OS::ActivationFrameAlignment();
-  }
-  // Store remaining arguments on stack, from low to high memory.
-  intptr_t* stack_argument = reinterpret_cast<intptr_t*>(entry_stack);
-  for (int i = 4; i < argument_count; i++) {
-    stack_argument[i - 4] = va_arg(parameters, int32_t);
-  }
-  va_end(parameters);
-  set_register(sp, entry_stack);
-
+void Simulator::CallInternal(byte* entry) {
   // Prepare to execute the code at entry
   set_register(pc, reinterpret_cast<int32_t>(entry));
   // Put down marker for end of simulation. The simulator will stop simulation
@@ -3359,6 +3355,37 @@ int32_t Simulator::Call(byte* entry, int argument_count, ...) {
   set_register(r9, r9_val);
   set_register(r10, r10_val);
   set_register(r11, r11_val);
+}
+
+
+int32_t Simulator::Call(byte* entry, int argument_count, ...) {
+  va_list parameters;
+  va_start(parameters, argument_count);
+  // Set up arguments
+
+  // First four arguments passed in registers.
+  ASSERT(argument_count >= 4);
+  set_register(r0, va_arg(parameters, int32_t));
+  set_register(r1, va_arg(parameters, int32_t));
+  set_register(r2, va_arg(parameters, int32_t));
+  set_register(r3, va_arg(parameters, int32_t));
+
+  // Remaining arguments passed on stack.
+  int original_stack = get_register(sp);
+  // Compute position of stack on entry to generated code.
+  int entry_stack = (original_stack - (argument_count - 4) * sizeof(int32_t));
+  if (OS::ActivationFrameAlignment() != 0) {
+    entry_stack &= -OS::ActivationFrameAlignment();
+  }
+  // Store remaining arguments on stack, from low to high memory.
+  intptr_t* stack_argument = reinterpret_cast<intptr_t*>(entry_stack);
+  for (int i = 4; i < argument_count; i++) {
+    stack_argument[i - 4] = va_arg(parameters, int32_t);
+  }
+  va_end(parameters);
+  set_register(sp, entry_stack);
+
+  CallInternal(entry);
 
   // Pop stack passed arguments.
   CHECK_EQ(entry_stack, get_register(sp));
@@ -3369,6 +3396,27 @@ int32_t Simulator::Call(byte* entry, int argument_count, ...) {
 }
 
 
+double Simulator::CallFP(byte* entry, double d0, double d1) {
+  if (use_eabi_hardfloat()) {
+    set_d_register_from_double(0, d0);
+    set_d_register_from_double(1, d1);
+  } else {
+    int buffer[2];
+    ASSERT(sizeof(buffer[0]) * 2 == sizeof(d0));
+    memcpy(buffer, &d0, sizeof(d0));
+    set_dw_register(0, buffer);
+    memcpy(buffer, &d1, sizeof(d1));
+    set_dw_register(2, buffer);
+  }
+  CallInternal(entry);
+  if (use_eabi_hardfloat()) {
+    return get_double_from_d_register(0);
+  } else {
+    return get_double_from_register_pair(0);
+  }
+}
+
+
 uintptr_t Simulator::PushAddress(uintptr_t address) {
   int new_sp = get_register(sp) - sizeof(uintptr_t);
   uintptr_t* stack_slot = reinterpret_cast<uintptr_t*>(new_sp);
diff --git a/deps/v8/src/arm/simulator-arm.h b/deps/v8/src/arm/simulator-arm.h
index abc91bbc42..ec47fa1f1c 100644
--- a/deps/v8/src/arm/simulator-arm.h
+++ b/deps/v8/src/arm/simulator-arm.h
@@ -205,6 +205,8 @@ class Simulator {
   // generated RegExp code with 7 parameters. This is a convenience function,
   // which sets up the simulator state and grabs the result on return.
   int32_t Call(byte* entry, int argument_count, ...);
+  // Alternative: call a 2-argument double function.
+  double CallFP(byte* entry, double d0, double d1);
 
   // Push an address onto the JS stack.
   uintptr_t PushAddress(uintptr_t address);
@@ -356,6 +358,8 @@ class Simulator {
   template<class InputType, int register_size>
       void SetVFPRegister(int reg_index, const InputType& value);
 
+  void CallInternal(byte* entry);
+
   // Architecture state.
   // Saturating instructions require a Q flag to indicate saturation.
   // There is currently no way to read the CPSR directly, and thus read the Q
diff --git a/deps/v8/src/arm/stub-cache-arm.cc b/deps/v8/src/arm/stub-cache-arm.cc
index 66714f8e44..a194dfae5b 100644
--- a/deps/v8/src/arm/stub-cache-arm.cc
+++ b/deps/v8/src/arm/stub-cache-arm.cc
@@ -327,18 +327,23 @@ void StubCompiler::GenerateFastPropertyLoad(MacroAssembler* masm,
                                             Register dst,
                                             Register src,
                                             Handle<JSObject> holder,
-                                            int index) {
-  // Adjust for the number of properties stored in the holder.
-  index -= holder->map()->inobject_properties();
-  if (index < 0) {
-    // Get the property straight out of the holder.
-    int offset = holder->map()->instance_size() + (index * kPointerSize);
+                                            PropertyIndex index) {
+  if (index.is_header_index()) {
+    int offset = index.header_index() * kPointerSize;
     __ ldr(dst, FieldMemOperand(src, offset));
   } else {
-    // Calculate the offset into the properties array.
-    int offset = index * kPointerSize + FixedArray::kHeaderSize;
-    __ ldr(dst, FieldMemOperand(src, JSObject::kPropertiesOffset));
-    __ ldr(dst, FieldMemOperand(dst, offset));
+    // Adjust for the number of properties stored in the holder.
+    int slot = index.field_index() - holder->map()->inobject_properties();
+    if (slot < 0) {
+      // Get the property straight out of the holder.
+      int offset = holder->map()->instance_size() + (slot * kPointerSize);
+      __ ldr(dst, FieldMemOperand(src, offset));
+    } else {
+      // Calculate the offset into the properties array.
+      int offset = slot * kPointerSize + FixedArray::kHeaderSize;
+      __ ldr(dst, FieldMemOperand(src, JSObject::kPropertiesOffset));
+      __ ldr(dst, FieldMemOperand(dst, offset));
+    }
   }
 }
 
@@ -1196,7 +1201,7 @@ void StubCompiler::GenerateLoadField(Handle<JSObject> object,
                                      Register scratch1,
                                      Register scratch2,
                                      Register scratch3,
-                                     int index,
+                                     PropertyIndex index,
                                      Handle<String> name,
                                      Label* miss) {
   // Check that the receiver isn't a smi.
@@ -1545,7 +1550,7 @@ void CallStubCompiler::GenerateMissBranch() {
 
 Handle<Code> CallStubCompiler::CompileCallField(Handle<JSObject> object,
                                                 Handle<JSObject> holder,
-                                                int index,
+                                                PropertyIndex index,
                                                 Handle<String> name) {
   // ----------- S t a t e -------------
   //  -- r2    : name
@@ -1618,7 +1623,7 @@ Handle<Code> CallStubCompiler::CompileArrayPushCall(
     Label call_builtin;
 
     if (argc == 1) {  // Otherwise fall through to call the builtin.
-      Label attempt_to_grow_elements;
+      Label attempt_to_grow_elements, with_write_barrier, check_double;
 
       Register elements = r6;
       Register end_elements = r5;
@@ -1629,10 +1634,9 @@ Handle<Code> CallStubCompiler::CompileArrayPushCall(
       __ CheckMap(elements,
                   r0,
                   Heap::kFixedArrayMapRootIndex,
-                  &call_builtin,
+                  &check_double,
                   DONT_DO_SMI_CHECK);
 
-
       // Get the array's length into r0 and calculate new length.
       __ ldr(r0, FieldMemOperand(receiver, JSArray::kLengthOffset));
       STATIC_ASSERT(kSmiTagSize == 1);
@@ -1647,7 +1651,6 @@ Handle<Code> CallStubCompiler::CompileArrayPushCall(
       __ b(gt, &attempt_to_grow_elements);
 
       // Check if value is a smi.
-      Label with_write_barrier;
       __ ldr(r4, MemOperand(sp, (argc - 1) * kPointerSize));
       __ JumpIfNotSmi(r4, &with_write_barrier);
 
@@ -1667,6 +1670,40 @@ Handle<Code> CallStubCompiler::CompileArrayPushCall(
       __ Drop(argc + 1);
       __ Ret();
 
+      __ bind(&check_double);
+
+      // Check that the elements are in fast mode and writable.
+      __ CheckMap(elements,
+                  r0,
+                  Heap::kFixedDoubleArrayMapRootIndex,
+                  &call_builtin,
+                  DONT_DO_SMI_CHECK);
+
+      // Get the array's length into r0 and calculate new length.
+      __ ldr(r0, FieldMemOperand(receiver, JSArray::kLengthOffset));
+      STATIC_ASSERT(kSmiTagSize == 1);
+      STATIC_ASSERT(kSmiTag == 0);
+      __ add(r0, r0, Operand(Smi::FromInt(argc)));
+
+      // Get the elements' length.
+      __ ldr(r4, FieldMemOperand(elements, FixedArray::kLengthOffset));
+
+      // Check if we could survive without allocation.
+      __ cmp(r0, r4);
+      __ b(gt, &call_builtin);
+
+      __ ldr(r4, MemOperand(sp, (argc - 1) * kPointerSize));
+      __ StoreNumberToDoubleElements(
+          r4, r0, elements, r3, r5, r2, r9,
+          &call_builtin, argc * kDoubleSize);
+
+      // Save new length.
+      __ str(r0, FieldMemOperand(receiver, JSArray::kLengthOffset));
+
+      // Check for a smi.
+      __ Drop(argc + 1);
+      __ Ret();
+
       __ bind(&with_write_barrier);
 
       __ ldr(r3, FieldMemOperand(receiver, HeapObject::kMapOffset));
@@ -1678,6 +1715,11 @@ Handle<Code> CallStubCompiler::CompileArrayPushCall(
         // In case of fast smi-only, convert to fast object, otherwise bail out.
         __ bind(&not_fast_object);
         __ CheckFastSmiElements(r3, r7, &call_builtin);
+
+        __ ldr(r7, FieldMemOperand(r4, HeapObject::kMapOffset));
+        __ LoadRoot(ip, Heap::kHeapNumberMapRootIndex);
+        __ cmp(r7, ip);
+        __ b(eq, &call_builtin);
         // edx: receiver
         // r3: map
         Label try_holey_map;
@@ -2912,7 +2954,7 @@ Handle<Code> LoadStubCompiler::CompileLoadNonexistent(Handle<String> name,
 
 Handle<Code> LoadStubCompiler::CompileLoadField(Handle<JSObject> object,
                                                 Handle<JSObject> holder,
-                                                int index,
+                                                PropertyIndex index,
                                                 Handle<String> name) {
   // ----------- S t a t e -------------
   //  -- r0    : receiver
@@ -3101,7 +3143,7 @@ Handle<Code> LoadStubCompiler::CompileLoadGlobal(
 Handle<Code> KeyedLoadStubCompiler::CompileLoadField(Handle<String> name,
                                                      Handle<JSObject> receiver,
                                                      Handle<JSObject> holder,
-                                                     int index) {
+                                                     PropertyIndex index) {
   // ----------- S t a t e -------------
   //  -- lr    : return address
   //  -- r0    : key
@@ -3467,7 +3509,13 @@ Handle<Code> ConstructStubCompiler::CompileConstructStub(
   // r1: constructor function
   // r2: initial map
   // r7: undefined
+  ASSERT(function->has_initial_map());
   __ ldrb(r3, FieldMemOperand(r2, Map::kInstanceSizeOffset));
+#ifdef DEBUG
+  int instance_size = function->initial_map()->instance_size();
+  __ cmp(r3, Operand(instance_size >> kPointerSizeLog2));
+  __ Check(eq, "Instance size of initial map changed.");
+#endif
   __ AllocateInNewSpace(r3, r4, r5, r6, &generic_stub_call, SIZE_IN_WORDS);
 
   // Allocated the JSObject, now initialize the fields. Map is set to initial
@@ -3525,7 +3573,6 @@ Handle<Code> ConstructStubCompiler::CompileConstructStub(
   }
 
   // Fill the unused in-object property fields with undefined.
-  ASSERT(function->has_initial_map());
   for (int i = shared->this_property_assignments_count();
        i < function->initial_map()->inobject_properties();
        i++) {
@@ -3646,6 +3693,7 @@ static void GenerateSmiKeyCheck(MacroAssembler* masm,
                                 Register scratch0,
                                 Register scratch1,
                                 DwVfpRegister double_scratch0,
+                                DwVfpRegister double_scratch1,
                                 Label* fail) {
   if (CpuFeatures::IsSupported(VFP2)) {
     CpuFeatures::Scope scope(VFP2);
@@ -3662,13 +3710,12 @@ static void GenerateSmiKeyCheck(MacroAssembler* masm,
     __ sub(ip, key, Operand(kHeapObjectTag));
     __ vldr(double_scratch0, ip, HeapNumber::kValueOffset);
     __ EmitVFPTruncate(kRoundToZero,
-                       double_scratch0.low(),
-                       double_scratch0,
                        scratch0,
+                       double_scratch0,
                        scratch1,
+                       double_scratch1,
                        kCheckForInexactConversion);
     __ b(ne, fail);
-    __ vmov(scratch0, double_scratch0.low());
     __ TrySmiTag(scratch0, fail, scratch1);
     __ mov(key, scratch0);
     __ bind(&key_ok);
@@ -3696,7 +3743,7 @@ void KeyedLoadStubCompiler::GenerateLoadExternalArray(
   // have been verified by the caller to not be a smi.
 
   // Check that the key is a smi or a heap number convertible to a smi.
-  GenerateSmiKeyCheck(masm, key, r4, r5, d1, &miss_force_generic);
+  GenerateSmiKeyCheck(masm, key, r4, r5, d1, d2, &miss_force_generic);
 
   __ ldr(r3, FieldMemOperand(receiver, JSObject::kElementsOffset));
   // r3: elements array
@@ -3787,36 +3834,42 @@ void KeyedLoadStubCompiler::GenerateLoadExternalArray(
     __ Ret();
 
     __ bind(&box_int);
-    // Allocate a HeapNumber for the result and perform int-to-double
-    // conversion.  Don't touch r0 or r1 as they are needed if allocation
-    // fails.
-    __ LoadRoot(r6, Heap::kHeapNumberMapRootIndex);
-    __ AllocateHeapNumber(r5, r3, r4, r6, &slow);
-    // Now we can use r0 for the result as key is not needed any more.
-    __ mov(r0, r5);
-
     if (CpuFeatures::IsSupported(VFP2)) {
       CpuFeatures::Scope scope(VFP2);
+      // Allocate a HeapNumber for the result and perform int-to-double
+      // conversion.  Don't touch r0 or r1 as they are needed if allocation
+      // fails.
+      __ LoadRoot(r6, Heap::kHeapNumberMapRootIndex);
+
+      __ AllocateHeapNumber(r5, r3, r4, r6, &slow, DONT_TAG_RESULT);
+      // Now we can use r0 for the result as key is not needed any more.
+      __ add(r0, r5, Operand(kHeapObjectTag));
       __ vmov(s0, value);
       __ vcvt_f64_s32(d0, s0);
-      __ sub(r3, r0, Operand(kHeapObjectTag));
-      __ vstr(d0, r3, HeapNumber::kValueOffset);
+      __ vstr(d0, r5, HeapNumber::kValueOffset);
       __ Ret();
     } else {
-      Register dst1 = r1;
-      Register dst2 = r3;
+      // Allocate a HeapNumber for the result and perform int-to-double
+      // conversion.  Don't touch r0 or r1 as they are needed if allocation
+      // fails.
+      __ LoadRoot(r6, Heap::kHeapNumberMapRootIndex);
+      __ AllocateHeapNumber(r5, r3, r4, r6, &slow, TAG_RESULT);
+      // Now we can use r0 for the result as key is not needed any more.
+      __ mov(r0, r5);
+      Register dst_mantissa = r1;
+      Register dst_exponent = r3;
       FloatingPointHelper::Destination dest =
           FloatingPointHelper::kCoreRegisters;
       FloatingPointHelper::ConvertIntToDouble(masm,
                                               value,
                                               dest,
                                               d0,
-                                              dst1,
-                                              dst2,
+                                              dst_mantissa,
+                                              dst_exponent,
                                               r9,
                                               s0);
-      __ str(dst1, FieldMemOperand(r0, HeapNumber::kMantissaOffset));
-      __ str(dst2, FieldMemOperand(r0, HeapNumber::kExponentOffset));
+      __ str(dst_mantissa, FieldMemOperand(r0, HeapNumber::kMantissaOffset));
+      __ str(dst_exponent, FieldMemOperand(r0, HeapNumber::kExponentOffset));
       __ Ret();
     }
   } else if (elements_kind == EXTERNAL_UNSIGNED_INT_ELEMENTS) {
@@ -3838,13 +3891,12 @@ void KeyedLoadStubCompiler::GenerateLoadExternalArray(
       // conversion. Don't use r0 and r1 as AllocateHeapNumber clobbers all
       // registers - also when jumping due to exhausted young space.
       __ LoadRoot(r6, Heap::kHeapNumberMapRootIndex);
-      __ AllocateHeapNumber(r2, r3, r4, r6, &slow);
+      __ AllocateHeapNumber(r2, r3, r4, r6, &slow, DONT_TAG_RESULT);
 
       __ vcvt_f64_u32(d0, s0);
-      __ sub(r1, r2, Operand(kHeapObjectTag));
-      __ vstr(d0, r1, HeapNumber::kValueOffset);
+      __ vstr(d0, r2, HeapNumber::kValueOffset);
 
-      __ mov(r0, r2);
+      __ add(r0, r2, Operand(kHeapObjectTag));
       __ Ret();
     } else {
       // Check whether unsigned integer fits into smi.
@@ -3876,7 +3928,7 @@ void KeyedLoadStubCompiler::GenerateLoadExternalArray(
       // clobbers all registers - also when jumping due to exhausted young
       // space.
       __ LoadRoot(r6, Heap::kHeapNumberMapRootIndex);
-      __ AllocateHeapNumber(r4, r5, r7, r6, &slow);
+      __ AllocateHeapNumber(r4, r5, r7, r6, &slow, TAG_RESULT);
 
       __ str(hiword, FieldMemOperand(r4, HeapNumber::kExponentOffset));
       __ str(loword, FieldMemOperand(r4, HeapNumber::kMantissaOffset));
@@ -3893,19 +3945,18 @@ void KeyedLoadStubCompiler::GenerateLoadExternalArray(
       // AllocateHeapNumber clobbers all registers - also when jumping due to
       // exhausted young space.
       __ LoadRoot(r6, Heap::kHeapNumberMapRootIndex);
-      __ AllocateHeapNumber(r2, r3, r4, r6, &slow);
+      __ AllocateHeapNumber(r2, r3, r4, r6, &slow, DONT_TAG_RESULT);
       __ vcvt_f64_f32(d0, s0);
-      __ sub(r1, r2, Operand(kHeapObjectTag));
-      __ vstr(d0, r1, HeapNumber::kValueOffset);
+      __ vstr(d0, r2, HeapNumber::kValueOffset);
 
-      __ mov(r0, r2);
+      __ add(r0, r2, Operand(kHeapObjectTag));
       __ Ret();
     } else {
       // Allocate a HeapNumber for the result. Don't use r0 and r1 as
       // AllocateHeapNumber clobbers all registers - also when jumping due to
       // exhausted young space.
       __ LoadRoot(r6, Heap::kHeapNumberMapRootIndex);
-      __ AllocateHeapNumber(r3, r4, r5, r6, &slow);
+      __ AllocateHeapNumber(r3, r4, r5, r6, &slow, TAG_RESULT);
       // VFP is not available, do manual single to double conversion.
 
       // r2: floating point value (binary32)
@@ -3961,18 +4012,17 @@ void KeyedLoadStubCompiler::GenerateLoadExternalArray(
       // AllocateHeapNumber clobbers all registers - also when jumping due to
       // exhausted young space.
       __ LoadRoot(r6, Heap::kHeapNumberMapRootIndex);
-      __ AllocateHeapNumber(r2, r3, r4, r6, &slow);
-      __ sub(r1, r2, Operand(kHeapObjectTag));
-      __ vstr(d0, r1, HeapNumber::kValueOffset);
+      __ AllocateHeapNumber(r2, r3, r4, r6, &slow, DONT_TAG_RESULT);
+      __ vstr(d0, r2, HeapNumber::kValueOffset);
 
-      __ mov(r0, r2);
+      __ add(r0, r2, Operand(kHeapObjectTag));
       __ Ret();
     } else {
       // Allocate a HeapNumber for the result. Don't use r0 and r1 as
       // AllocateHeapNumber clobbers all registers - also when jumping due to
       // exhausted young space.
       __ LoadRoot(r7, Heap::kHeapNumberMapRootIndex);
-      __ AllocateHeapNumber(r4, r5, r6, r7, &slow);
+      __ AllocateHeapNumber(r4, r5, r6, r7, &slow, TAG_RESULT);
 
       __ str(r2, FieldMemOperand(r4, HeapNumber::kMantissaOffset));
       __ str(r3, FieldMemOperand(r4, HeapNumber::kExponentOffset));
@@ -4030,7 +4080,7 @@ void KeyedStoreStubCompiler::GenerateStoreExternalArray(
   // have been verified by the caller to not be a smi.
 
   // Check that the key is a smi or a heap number convertible to a smi.
-  GenerateSmiKeyCheck(masm, key, r4, r5, d1, &miss_force_generic);
+  GenerateSmiKeyCheck(masm, key, r4, r5, d1, d2, &miss_force_generic);
 
   __ ldr(r3, FieldMemOperand(receiver, JSObject::kElementsOffset));
 
@@ -4088,7 +4138,7 @@ void KeyedStoreStubCompiler::GenerateStoreExternalArray(
       }
       FloatingPointHelper::ConvertIntToDouble(
           masm, r5, destination,
-          d0, r6, r7,  // These are: double_dst, dst1, dst2.
+          d0, r6, r7,  // These are: double_dst, dst_mantissa, dst_exponent.
           r4, s2);  // These are: scratch2, single_scratch.
       if (destination == FloatingPointHelper::kVFPRegisters) {
         CpuFeatures::Scope scope(VFP2);
@@ -4147,7 +4197,7 @@ void KeyedStoreStubCompiler::GenerateStoreExternalArray(
         // not include -kHeapObjectTag into it.
         __ sub(r5, value, Operand(kHeapObjectTag));
         __ vldr(d0, r5, HeapNumber::kValueOffset);
-        __ EmitECMATruncate(r5, d0, s2, r6, r7, r9);
+        __ EmitECMATruncate(r5, d0, d1, r6, r7, r9);
 
         switch (elements_kind) {
           case EXTERNAL_BYTE_ELEMENTS:
@@ -4365,7 +4415,7 @@ void KeyedLoadStubCompiler::GenerateLoadFastElement(MacroAssembler* masm) {
   // have been verified by the caller to not be a smi.
 
   // Check that the key is a smi or a heap number convertible to a smi.
-  GenerateSmiKeyCheck(masm, r0, r4, r5, d1, &miss_force_generic);
+  GenerateSmiKeyCheck(masm, r0, r4, r5, d1, d2, &miss_force_generic);
 
   // Get the elements array.
   __ ldr(r2, FieldMemOperand(r1, JSObject::kElementsOffset));
@@ -4417,7 +4467,7 @@ void KeyedLoadStubCompiler::GenerateLoadFastDoubleElement(
   // have been verified by the caller to not be a smi.
 
   // Check that the key is a smi or a heap number convertible to a smi.
-  GenerateSmiKeyCheck(masm, key_reg, r4, r5, d1, &miss_force_generic);
+  GenerateSmiKeyCheck(masm, key_reg, r4, r5, d1, d2, &miss_force_generic);
 
   // Get the elements array.
   __ ldr(elements_reg,
@@ -4439,7 +4489,7 @@ void KeyedLoadStubCompiler::GenerateLoadFastDoubleElement(
   // Non-NaN. Allocate a new heap number and copy the double value into it.
   __ LoadRoot(heap_number_map, Heap::kHeapNumberMapRootIndex);
   __ AllocateHeapNumber(heap_number_reg, scratch2, scratch3,
-                        heap_number_map, &slow_allocate_heapnumber);
+                        heap_number_map, &slow_allocate_heapnumber, TAG_RESULT);
 
   // Don't need to reload the upper 32 bits of the double, it's already in
   // scratch.
@@ -4493,7 +4543,7 @@ void KeyedStoreStubCompiler::GenerateStoreFastElement(
   // have been verified by the caller to not be a smi.
 
   // Check that the key is a smi or a heap number convertible to a smi.
-  GenerateSmiKeyCheck(masm, key_reg, r4, r5, d1, &miss_force_generic);
+  GenerateSmiKeyCheck(masm, key_reg, r4, r5, d1, d2, &miss_force_generic);
 
   if (IsFastSmiElementsKind(elements_kind)) {
     __ JumpIfNotSmi(value_reg, &transition_elements_kind);
@@ -4640,9 +4690,12 @@ void KeyedStoreStubCompiler::GenerateStoreFastDoubleElement(
   //  -- r1    : key
   //  -- r2    : receiver
   //  -- lr    : return address
-  //  -- r3    : scratch
+  //  -- r3    : scratch (elements backing store)
   //  -- r4    : scratch
   //  -- r5    : scratch
+  //  -- r6    : scratch
+  //  -- r7    : scratch
+  //  -- r9    : scratch
   // -----------------------------------
   Label miss_force_generic, transition_elements_kind, grow, slow;
   Label finish_store, check_capacity;
@@ -4655,13 +4708,14 @@ void KeyedStoreStubCompiler::GenerateStoreFastDoubleElement(
   Register scratch2 = r5;
   Register scratch3 = r6;
   Register scratch4 = r7;
+  Register scratch5 = r9;
   Register length_reg = r7;
 
   // This stub is meant to be tail-jumped to, the receiver must already
   // have been verified by the caller to not be a smi.
 
   // Check that the key is a smi or a heap number convertible to a smi.
-  GenerateSmiKeyCheck(masm, key_reg, r4, r5, d1, &miss_force_generic);
+  GenerateSmiKeyCheck(masm, key_reg, r4, r5, d1, d2, &miss_force_generic);
 
   __ ldr(elements_reg,
          FieldMemOperand(receiver_reg, JSObject::kElementsOffset));
@@ -4685,7 +4739,7 @@ void KeyedStoreStubCompiler::GenerateStoreFastDoubleElement(
   __ bind(&finish_store);
   __ StoreNumberToDoubleElements(value_reg,
                                  key_reg,
-                                 receiver_reg,
+                                 // All registers after this are overwritten.
                                  elements_reg,
                                  scratch1,
                                  scratch2,
@@ -4733,8 +4787,7 @@ void KeyedStoreStubCompiler::GenerateStoreFastDoubleElement(
     __ AllocateInNewSpace(size, elements_reg, scratch1, scratch2, &slow,
                           TAG_OBJECT);
 
-    // Initialize the new FixedDoubleArray. Leave elements unitialized for
-    // efficiency, they are guaranteed to be initialized before use.
+    // Initialize the new FixedDoubleArray.
     __ LoadRoot(scratch1, Heap::kFixedDoubleArrayMapRootIndex);
     __ str(scratch1, FieldMemOperand(elements_reg, JSObject::kMapOffset));
     __ mov(scratch1,
@@ -4742,6 +4795,25 @@ void KeyedStoreStubCompiler::GenerateStoreFastDoubleElement(
     __ str(scratch1,
            FieldMemOperand(elements_reg, FixedDoubleArray::kLengthOffset));
 
+    __ mov(scratch1, elements_reg);
+    __ StoreNumberToDoubleElements(value_reg,
+                                   key_reg,
+                                   // All registers after this are overwritten.
+                                   scratch1,
+                                   scratch2,
+                                   scratch3,
+                                   scratch4,
+                                   scratch5,
+                                   &transition_elements_kind);
+
+    __ mov(scratch1, Operand(kHoleNanLower32));
+    __ mov(scratch2, Operand(kHoleNanUpper32));
+    for (int i = 1; i < JSArray::kPreallocatedArrayElements; i++) {
+      int offset = FixedDoubleArray::OffsetOfElementAt(i);
+      __ str(scratch1, FieldMemOperand(elements_reg, offset));
+      __ str(scratch2, FieldMemOperand(elements_reg, offset + kPointerSize));
+    }
+
     // Install the new backing store in the JSArray.
     __ str(elements_reg,
            FieldMemOperand(receiver_reg, JSObject::kElementsOffset));
@@ -4754,7 +4826,7 @@ void KeyedStoreStubCompiler::GenerateStoreFastDoubleElement(
     __ str(length_reg, FieldMemOperand(receiver_reg, JSArray::kLengthOffset));
     __ ldr(elements_reg,
            FieldMemOperand(receiver_reg, JSObject::kElementsOffset));
-    __ jmp(&finish_store);
+    __ Ret();
 
     __ bind(&check_capacity);
     // Make sure that the backing store can hold additional elements.
diff --git a/deps/v8/src/array.js b/deps/v8/src/array.js
index 1cedd8d476..47f796d2b1 100644
--- a/deps/v8/src/array.js
+++ b/deps/v8/src/array.js
@@ -62,7 +62,7 @@ function GetSortedArrayKeys(array, intervals) {
       }
     }
   }
-  keys.sort(function(a, b) { return a - b; });
+  %_CallFunction(keys, function(a, b) { return a - b; }, ArraySort);
   return keys;
 }
 
@@ -413,6 +413,7 @@ function ArrayJoin(separator) {
                         ["Array.prototype.join"]);
   }
 
+  var length = TO_UINT32(this.length);
   if (IS_UNDEFINED(separator)) {
     separator = ',';
   } else if (!IS_STRING(separator)) {
@@ -422,7 +423,7 @@ function ArrayJoin(separator) {
   var result = %_FastAsciiArrayJoin(this, separator);
   if (!IS_UNDEFINED(result)) return result;
 
-  return Join(this, TO_UINT32(this.length), separator, ConvertToString);
+  return Join(this, length, separator, ConvertToString);
 }
 
 
@@ -441,8 +442,8 @@ function ArrayPop() {
   }
   n--;
   var value = this[n];
-  this.length = n;
   delete this[n];
+  this.length = n;
   return value;
 }
 
@@ -581,7 +582,7 @@ function ArrayShift() {
 
   var first = this[0];
 
-  if (IS_ARRAY(this)) {
+  if (IS_ARRAY(this) && !%IsObserved(this)) {
     SmartMove(this, 0, 1, len, 0);
   } else {
     SimpleMove(this, 0, 1, len, 0);
@@ -602,7 +603,7 @@ function ArrayUnshift(arg1) {  // length == 1
   var len = TO_UINT32(this.length);
   var num_arguments = %_ArgumentsLength();
 
-  if (IS_ARRAY(this)) {
+  if (IS_ARRAY(this) && !%IsObserved(this)) {
     SmartMove(this, 0, 0, len, num_arguments);
   } else {
     SimpleMove(this, 0, 0, len, num_arguments);
@@ -649,6 +650,7 @@ function ArraySlice(start, end) {
   if (end_i < start_i) return result;
 
   if (IS_ARRAY(this) &&
+      !%IsObserved(this) &&
       (end_i > 1000) &&
       (%EstimateNumberOfElements(this) < end_i)) {
     SmartSlice(this, start_i, end_i - start_i, len, result);
@@ -705,7 +707,9 @@ function ArraySplice(start, delete_count) {
 
   var use_simple_splice = true;
 
-  if (IS_ARRAY(this) && num_additional_args !== del_count) {
+  if (IS_ARRAY(this) &&
+      !%IsObserved(this) &&
+      num_additional_args !== del_count) {
     // If we are only deleting/moving a few things near the end of the
     // array then the simple version is going to be faster, because it
     // doesn't touch most of the array.
@@ -1549,9 +1553,11 @@ function SetUpArray() {
   // exposed to user code.
   // Adding only the functions that are actually used.
   SetUpLockedPrototype(InternalArray, $Array(), $Array(
+    "indexOf", getFunction("indexOf", ArrayIndexOf),
     "join", getFunction("join", ArrayJoin),
     "pop", getFunction("pop", ArrayPop),
-    "push", getFunction("push", ArrayPush)
+    "push", getFunction("push", ArrayPush),
+    "splice", getFunction("splice", ArraySplice)
   ));
 }
 
diff --git a/deps/v8/src/assembler.cc b/deps/v8/src/assembler.cc
index a58f77f74b..25157be2eb 100644
--- a/deps/v8/src/assembler.cc
+++ b/deps/v8/src/assembler.cc
@@ -103,15 +103,78 @@ static DoubleConstant double_constants;
 
 const char* const RelocInfo::kFillerCommentString = "DEOPTIMIZATION PADDING";
 
+static bool math_exp_data_initialized = false;
+static Mutex* math_exp_data_mutex = NULL;
+static double* math_exp_constants_array = NULL;
+static double* math_exp_log_table_array = NULL;
+
 // -----------------------------------------------------------------------------
 // Implementation of AssemblerBase
 
-AssemblerBase::AssemblerBase(Isolate* isolate)
+AssemblerBase::AssemblerBase(Isolate* isolate, void* buffer, int buffer_size)
     : isolate_(isolate),
-      jit_cookie_(0) {
+      jit_cookie_(0),
+      emit_debug_code_(FLAG_debug_code),
+      predictable_code_size_(false) {
   if (FLAG_mask_constants_with_cookie && isolate != NULL)  {
     jit_cookie_ = V8::RandomPrivate(isolate);
   }
+
+  if (buffer == NULL) {
+    // Do our own buffer management.
+    if (buffer_size <= kMinimalBufferSize) {
+      buffer_size = kMinimalBufferSize;
+      if (isolate->assembler_spare_buffer() != NULL) {
+        buffer = isolate->assembler_spare_buffer();
+        isolate->set_assembler_spare_buffer(NULL);
+      }
+    }
+    if (buffer == NULL) buffer = NewArray<byte>(buffer_size);
+    own_buffer_ = true;
+  } else {
+    // Use externally provided buffer instead.
+    ASSERT(buffer_size > 0);
+    own_buffer_ = false;
+  }
+  buffer_ = static_cast<byte*>(buffer);
+  buffer_size_ = buffer_size;
+
+  pc_ = buffer_;
+}
+
+
+AssemblerBase::~AssemblerBase() {
+  if (own_buffer_) {
+    if (isolate() != NULL &&
+        isolate()->assembler_spare_buffer() == NULL &&
+        buffer_size_ == kMinimalBufferSize) {
+      isolate()->set_assembler_spare_buffer(buffer_);
+    } else {
+      DeleteArray(buffer_);
+    }
+  }
+}
+
+
+// -----------------------------------------------------------------------------
+// Implementation of PredictableCodeSizeScope
+
+PredictableCodeSizeScope::PredictableCodeSizeScope(AssemblerBase* assembler,
+                                                   int expected_size)
+    : assembler_(assembler),
+      expected_size_(expected_size),
+      start_offset_(assembler->pc_offset()),
+      old_value_(assembler->predictable_code_size()) {
+  assembler_->set_predictable_code_size(true);
+}
+
+
+PredictableCodeSizeScope::~PredictableCodeSizeScope() {
+  // TODO(svenpanne) Remove the 'if' when everything works.
+  if (expected_size_ >= 0) {
+    CHECK_EQ(expected_size_, assembler_->pc_offset() - start_offset_);
+  }
+  assembler_->set_predictable_code_size(old_value_);
 }
 
 
@@ -313,6 +376,7 @@ void RelocInfoWriter::Write(const RelocInfo* rinfo) {
 #ifdef DEBUG
   byte* begin_pos = pos_;
 #endif
+  ASSERT(rinfo->rmode() < RelocInfo::NUMBER_OF_MODES);
   ASSERT(rinfo->pc() - last_pc_ >= 0);
   ASSERT(RelocInfo::LAST_STANDARD_NONCOMPACT_ENUM - RelocInfo::LAST_COMPACT_ENUM
          <= kMaxStandardNonCompactModes);
@@ -570,6 +634,15 @@ void RelocIterator::next() {
       }
     }
   }
+  if (code_age_sequence_ != NULL) {
+    byte* old_code_age_sequence = code_age_sequence_;
+    code_age_sequence_ = NULL;
+    if (SetMode(RelocInfo::CODE_AGE_SEQUENCE)) {
+      rinfo_.data_ = 0;
+      rinfo_.pc_ = old_code_age_sequence;
+      return;
+    }
+  }
   done_ = true;
 }
 
@@ -585,6 +658,12 @@ RelocIterator::RelocIterator(Code* code, int mode_mask) {
   mode_mask_ = mode_mask;
   last_id_ = 0;
   last_position_ = 0;
+  byte* sequence = code->FindCodeAgeSequence();
+  if (sequence != NULL && !Code::IsYoungSequence(sequence)) {
+    code_age_sequence_ = sequence;
+  } else {
+    code_age_sequence_ = NULL;
+  }
   if (mode_mask_ == 0) pos_ = end_;
   next();
 }
@@ -600,6 +679,7 @@ RelocIterator::RelocIterator(const CodeDesc& desc, int mode_mask) {
   mode_mask_ = mode_mask;
   last_id_ = 0;
   last_position_ = 0;
+  code_age_sequence_ = NULL;
   if (mode_mask_ == 0) pos_ = end_;
   next();
 }
@@ -652,6 +732,8 @@ const char* RelocInfo::RelocModeName(RelocInfo::Mode rmode) {
       UNREACHABLE();
 #endif
       return "debug break slot";
+    case RelocInfo::CODE_AGE_SEQUENCE:
+      return "code_age_sequence";
     case RelocInfo::NUMBER_OF_MODES:
       UNREACHABLE();
       return "number_of_modes";
@@ -697,7 +779,7 @@ void RelocInfo::Print(FILE* out) {
 #endif  // ENABLE_DISASSEMBLER
 
 
-#ifdef DEBUG
+#ifdef VERIFY_HEAP
 void RelocInfo::Verify() {
   switch (rmode_) {
     case EMBEDDED_OBJECT:
@@ -717,12 +799,12 @@ void RelocInfo::Verify() {
     case CODE_TARGET: {
       // convert inline target address to code object
       Address addr = target_address();
-      ASSERT(addr != NULL);
+      CHECK(addr != NULL);
       // Check that we can find the right code object.
       Code* code = Code::GetCodeFromTargetAddress(addr);
       Object* found = HEAP->FindCodeObject(addr);
-      ASSERT(found->IsCode());
-      ASSERT(code->address() == HeapObject::cast(found)->address());
+      CHECK(found->IsCode());
+      CHECK(code->address() == HeapObject::cast(found)->address());
       break;
     }
     case RUNTIME_ENTRY:
@@ -739,9 +821,12 @@ void RelocInfo::Verify() {
     case NUMBER_OF_MODES:
       UNREACHABLE();
       break;
+    case CODE_AGE_SEQUENCE:
+      ASSERT(Code::IsYoungSequence(pc_) || code_age_stub()->IsCode());
+      break;
   }
 }
-#endif  // DEBUG
+#endif  // VERIFY_HEAP
 
 
 // -----------------------------------------------------------------------------
@@ -756,6 +841,70 @@ void ExternalReference::SetUp() {
   double_constants.canonical_non_hole_nan = OS::nan_value();
   double_constants.the_hole_nan = BitCast<double>(kHoleNanInt64);
   double_constants.negative_infinity = -V8_INFINITY;
+
+  math_exp_data_mutex = OS::CreateMutex();
+}
+
+
+void ExternalReference::InitializeMathExpData() {
+  // Early return?
+  if (math_exp_data_initialized) return;
+
+  math_exp_data_mutex->Lock();
+  if (!math_exp_data_initialized) {
+    // If this is changed, generated code must be adapted too.
+    const int kTableSizeBits = 11;
+    const int kTableSize = 1 << kTableSizeBits;
+    const double kTableSizeDouble = static_cast<double>(kTableSize);
+
+    math_exp_constants_array = new double[9];
+    // Input values smaller than this always return 0.
+    math_exp_constants_array[0] = -708.39641853226408;
+    // Input values larger than this always return +Infinity.
+    math_exp_constants_array[1] = 709.78271289338397;
+    math_exp_constants_array[2] = V8_INFINITY;
+    // The rest is black magic. Do not attempt to understand it. It is
+    // loosely based on the "expd" function published at:
+    // http://herumi.blogspot.com/2011/08/fast-double-precision-exponential.html
+    const double constant3 = (1 << kTableSizeBits) / log(2.0);
+    math_exp_constants_array[3] = constant3;
+    math_exp_constants_array[4] =
+        static_cast<double>(static_cast<int64_t>(3) << 51);
+    math_exp_constants_array[5] = 1 / constant3;
+    math_exp_constants_array[6] = 3.0000000027955394;
+    math_exp_constants_array[7] = 0.16666666685227835;
+    math_exp_constants_array[8] = 1;
+
+    math_exp_log_table_array = new double[kTableSize];
+    for (int i = 0; i < kTableSize; i++) {
+      double value = pow(2, i / kTableSizeDouble);
+
+      uint64_t bits = BitCast<uint64_t, double>(value);
+      bits &= (static_cast<uint64_t>(1) << 52) - 1;
+      double mantissa = BitCast<double, uint64_t>(bits);
+
+      // <just testing>
+      uint64_t doublebits;
+      memcpy(&doublebits, &value, sizeof doublebits);
+      doublebits &= (static_cast<uint64_t>(1) << 52) - 1;
+      double mantissa2;
+      memcpy(&mantissa2, &doublebits, sizeof mantissa2);
+      CHECK_EQ(mantissa, mantissa2);
+      // </just testing>
+
+      math_exp_log_table_array[i] = mantissa;
+    }
+
+    math_exp_data_initialized = true;
+  }
+  math_exp_data_mutex->Unlock();
+}
+
+
+void ExternalReference::TearDownMathExpData() {
+  delete[] math_exp_constants_array;
+  delete[] math_exp_log_table_array;
+  delete math_exp_data_mutex;
 }
 
 
@@ -874,6 +1023,13 @@ ExternalReference ExternalReference::get_date_field_function(
 }
 
 
+ExternalReference ExternalReference::get_make_code_young_function(
+    Isolate* isolate) {
+  return ExternalReference(Redirect(
+      isolate, FUNCTION_ADDR(Code::MakeCodeAgeSequenceYoung)));
+}
+
+
 ExternalReference ExternalReference::date_cache_stamp(Isolate* isolate) {
   return ExternalReference(isolate->date_cache()->stamp_address());
 }
@@ -900,6 +1056,20 @@ ExternalReference ExternalReference::compute_output_frames_function(
 }
 
 
+ExternalReference ExternalReference::log_enter_external_function(
+    Isolate* isolate) {
+  return ExternalReference(
+      Redirect(isolate, FUNCTION_ADDR(Logger::EnterExternal)));
+}
+
+
+ExternalReference ExternalReference::log_leave_external_function(
+    Isolate* isolate) {
+  return ExternalReference(
+      Redirect(isolate, FUNCTION_ADDR(Logger::LeaveExternal)));
+}
+
+
 ExternalReference ExternalReference::keyed_lookup_cache_keys(Isolate* isolate) {
   return ExternalReference(isolate->keyed_lookup_cache()->keys_address());
 }
@@ -1186,6 +1356,19 @@ ExternalReference ExternalReference::math_log_double_function(
 }
 
 
+ExternalReference ExternalReference::math_exp_constants(int constant_index) {
+  ASSERT(math_exp_data_initialized);
+  return ExternalReference(
+      reinterpret_cast<void*>(math_exp_constants_array + constant_index));
+}
+
+
+ExternalReference ExternalReference::math_exp_log_table() {
+  ASSERT(math_exp_data_initialized);
+  return ExternalReference(reinterpret_cast<void*>(math_exp_log_table_array));
+}
+
+
 ExternalReference ExternalReference::page_flags(Page* page) {
   return ExternalReference(reinterpret_cast<Address>(page) +
                            MemoryChunk::kFlagsOffset);
diff --git a/deps/v8/src/assembler.h b/deps/v8/src/assembler.h
index cb5a72d755..4639374c22 100644
--- a/deps/v8/src/assembler.h
+++ b/deps/v8/src/assembler.h
@@ -56,18 +56,56 @@ struct StatsCounter;
 
 class AssemblerBase: public Malloced {
  public:
-  explicit AssemblerBase(Isolate* isolate);
+  AssemblerBase(Isolate* isolate, void* buffer, int buffer_size);
+  virtual ~AssemblerBase();
 
   Isolate* isolate() const { return isolate_; }
-  int jit_cookie() { return jit_cookie_; }
+  int jit_cookie() const { return jit_cookie_; }
+
+  bool emit_debug_code() const { return emit_debug_code_; }
+  void set_emit_debug_code(bool value) { emit_debug_code_ = value; }
+
+  bool predictable_code_size() const { return predictable_code_size_; }
+  void set_predictable_code_size(bool value) { predictable_code_size_ = value; }
 
   // Overwrite a host NaN with a quiet target NaN.  Used by mksnapshot for
   // cross-snapshotting.
   static void QuietNaN(HeapObject* nan) { }
 
+  int pc_offset() const { return static_cast<int>(pc_ - buffer_); }
+
+  static const int kMinimalBufferSize = 4*KB;
+
+ protected:
+  // The buffer into which code and relocation info are generated. It could
+  // either be owned by the assembler or be provided externally.
+  byte* buffer_;
+  int buffer_size_;
+  bool own_buffer_;
+
+  // The program counter, which points into the buffer above and moves forward.
+  byte* pc_;
+
  private:
   Isolate* isolate_;
   int jit_cookie_;
+  bool emit_debug_code_;
+  bool predictable_code_size_;
+};
+
+
+// Avoids using instructions that vary in size in unpredictable ways between the
+// snapshot and the running VM.
+class PredictableCodeSizeScope {
+ public:
+  PredictableCodeSizeScope(AssemblerBase* assembler, int expected_size);
+  ~PredictableCodeSizeScope();
+
+ private:
+  AssemblerBase* assembler_;
+  int expected_size_;
+  int start_offset_;
+  bool old_value_;
 };
 
 
@@ -211,6 +249,12 @@ class RelocInfo BASE_EMBEDDED {
     // Pseudo-types
     NUMBER_OF_MODES,  // There are at most 15 modes with noncompact encoding.
     NONE,  // never recorded
+    CODE_AGE_SEQUENCE,  // Not stored in RelocInfo array, used explictly by
+                        // code aging.
+    FIRST_REAL_RELOC_MODE = CODE_TARGET,
+    LAST_REAL_RELOC_MODE = CONST_POOL,
+    FIRST_PSEUDO_RELOC_MODE = CODE_AGE_SEQUENCE,
+    LAST_PSEUDO_RELOC_MODE = CODE_AGE_SEQUENCE,
     LAST_CODE_ENUM = DEBUG_BREAK,
     LAST_GCED_ENUM = GLOBAL_PROPERTY_CELL,
     // Modes <= LAST_COMPACT_ENUM are guaranteed to have compact encoding.
@@ -225,6 +269,15 @@ class RelocInfo BASE_EMBEDDED {
       : pc_(pc), rmode_(rmode), data_(data), host_(host) {
   }
 
+  static inline bool IsRealRelocMode(Mode mode) {
+    return mode >= FIRST_REAL_RELOC_MODE &&
+        mode <= LAST_REAL_RELOC_MODE;
+  }
+  static inline bool IsPseudoRelocMode(Mode mode) {
+    ASSERT(!IsRealRelocMode(mode));
+    return mode >= FIRST_PSEUDO_RELOC_MODE &&
+        mode <= LAST_PSEUDO_RELOC_MODE;
+  }
   static inline bool IsConstructCall(Mode mode) {
     return mode == CONSTRUCT_CALL;
   }
@@ -262,6 +315,9 @@ class RelocInfo BASE_EMBEDDED {
   static inline bool IsDebugBreakSlot(Mode mode) {
     return mode == DEBUG_BREAK_SLOT;
   }
+  static inline bool IsCodeAgeSequence(Mode mode) {
+    return mode == CODE_AGE_SEQUENCE;
+  }
   static inline int ModeMask(Mode mode) { return 1 << mode; }
 
   // Accessors
@@ -294,7 +350,8 @@ class RelocInfo BASE_EMBEDDED {
   INLINE(Handle<JSGlobalPropertyCell> target_cell_handle());
   INLINE(void set_target_cell(JSGlobalPropertyCell* cell,
                               WriteBarrierMode mode = UPDATE_WRITE_BARRIER));
-
+  INLINE(Code* code_age_stub());
+  INLINE(void set_code_age_stub(Code* stub));
 
   // Read the address of the word containing the target_address in an
   // instruction stream.  What this means exactly is architecture-independent.
@@ -349,8 +406,7 @@ class RelocInfo BASE_EMBEDDED {
   static const char* RelocModeName(Mode rmode);
   void Print(FILE* out);
 #endif  // ENABLE_DISASSEMBLER
-#ifdef DEBUG
-  // Debugging
+#ifdef VERIFY_HEAP
   void Verify();
 #endif
 
@@ -369,19 +425,17 @@ class RelocInfo BASE_EMBEDDED {
   Mode rmode_;
   intptr_t data_;
   Code* host_;
-#ifdef V8_TARGET_ARCH_MIPS
-  // Code and Embedded Object pointers in mips are stored split
+  // Code and Embedded Object pointers on some platforms are stored split
   // across two consecutive 32-bit instructions. Heap management
   // routines expect to access these pointers indirectly. The following
-  // location provides a place for these pointers to exist natually
+  // location provides a place for these pointers to exist naturally
   // when accessed via the Iterator.
   Object* reconstructed_obj_ptr_;
   // External-reference pointers are also split across instruction-pairs
-  // in mips, but are accessed via indirect pointers. This location
+  // on some platforms, but are accessed via indirect pointers. This location
   // provides a place for that pointer to exist naturally. Its address
   // is returned by RelocInfo::target_reference_address().
   Address reconstructed_adr_ptr_;
-#endif  // V8_TARGET_ARCH_MIPS
   friend class RelocIterator;
 };
 
@@ -490,6 +544,7 @@ class RelocIterator: public Malloced {
 
   byte* pos_;
   byte* end_;
+  byte* code_age_sequence_;
   RelocInfo rinfo_;
   bool done_;
   int mode_mask_;
@@ -549,6 +604,8 @@ class ExternalReference BASE_EMBEDDED {
   };
 
   static void SetUp();
+  static void InitializeMathExpData();
+  static void TearDownMathExpData();
 
   typedef void* ExternalReferenceRedirector(void* original, Type type);
 
@@ -598,10 +655,16 @@ class ExternalReference BASE_EMBEDDED {
   static ExternalReference get_date_field_function(Isolate* isolate);
   static ExternalReference date_cache_stamp(Isolate* isolate);
 
+  static ExternalReference get_make_code_young_function(Isolate* isolate);
+
   // Deoptimization support.
   static ExternalReference new_deoptimizer_function(Isolate* isolate);
   static ExternalReference compute_output_frames_function(Isolate* isolate);
 
+  // Log support.
+  static ExternalReference log_enter_external_function(Isolate* isolate);
+  static ExternalReference log_leave_external_function(Isolate* isolate);
+
   // Static data in the keyed lookup cache.
   static ExternalReference keyed_lookup_cache_keys(Isolate* isolate);
   static ExternalReference keyed_lookup_cache_field_offsets(Isolate* isolate);
@@ -668,6 +731,9 @@ class ExternalReference BASE_EMBEDDED {
   static ExternalReference math_tan_double_function(Isolate* isolate);
   static ExternalReference math_log_double_function(Isolate* isolate);
 
+  static ExternalReference math_exp_constants(int constant_index);
+  static ExternalReference math_exp_log_table();
+
   static ExternalReference page_flags(Page* page);
 
   Address address() const {return reinterpret_cast<Address>(address_);}
diff --git a/deps/v8/src/ast.cc b/deps/v8/src/ast.cc
index 6b68705d27..232cb739a1 100644
--- a/deps/v8/src/ast.cc
+++ b/deps/v8/src/ast.cc
@@ -103,6 +103,7 @@ VariableProxy::VariableProxy(Isolate* isolate,
 void VariableProxy::BindTo(Variable* var) {
   ASSERT(var_ == NULL);  // must be bound only once
   ASSERT(var != NULL);  // must bind
+  ASSERT(!FLAG_harmony_modules || interface_->IsUnified(var->interface()));
   ASSERT((is_this() && var->is_this()) || name_.is_identical_to(var->name()));
   // Ideally CONST-ness should match. However, this is very hard to achieve
   // because we don't know the exact semantics of conflicting (const and
@@ -126,8 +127,6 @@ Assignment::Assignment(Isolate* isolate,
       pos_(pos),
       binary_operation_(NULL),
       assignment_id_(GetNextId(isolate)),
-      block_start_(false),
-      block_end_(false),
       is_monomorphic_(false) { }
 
 
@@ -478,6 +477,7 @@ void CountOperation::RecordTypeFeedback(TypeFeedbackOracle* oracle,
 
 void CaseClause::RecordTypeFeedback(TypeFeedbackOracle* oracle) {
   TypeInfo info = oracle->SwitchType(this);
+  if (info.IsUninitialized()) info = TypeInfo::Unknown();
   if (info.IsSmi()) {
     compare_type_ = SMI_ONLY;
   } else if (info.IsSymbol()) {
@@ -606,18 +606,6 @@ void CallNew::RecordTypeFeedback(TypeFeedbackOracle* oracle) {
 }
 
 
-void CompareOperation::RecordTypeFeedback(TypeFeedbackOracle* oracle) {
-  TypeInfo info = oracle->CompareType(this);
-  if (info.IsSmi()) {
-    compare_type_ = SMI_ONLY;
-  } else if (info.IsNonPrimitive()) {
-    compare_type_ = OBJECT_ONLY;
-  } else {
-    ASSERT(compare_type_ == NONE);
-  }
-}
-
-
 void ObjectLiteral::Property::RecordTypeFeedback(TypeFeedbackOracle* oracle) {
   receiver_type_ = oracle->ObjectLiteralStoreIsMonomorphic(this)
       ? oracle->GetObjectLiteralStoreMap(this)
@@ -1072,16 +1060,14 @@ REGULAR_NODE(CallNew)
 // LOOKUP variables only result from constructs that cannot be inlined anyway.
 REGULAR_NODE(VariableProxy)
 
-// We currently do not optimize any modules. Note in particular, that module
-// instance objects associated with ModuleLiterals are allocated during
-// scope resolution, and references to them are embedded into the code.
-// That code may hence neither be cached nor re-compiled.
+// We currently do not optimize any modules.
 DONT_OPTIMIZE_NODE(ModuleDeclaration)
 DONT_OPTIMIZE_NODE(ImportDeclaration)
 DONT_OPTIMIZE_NODE(ExportDeclaration)
 DONT_OPTIMIZE_NODE(ModuleVariable)
 DONT_OPTIMIZE_NODE(ModulePath)
 DONT_OPTIMIZE_NODE(ModuleUrl)
+DONT_OPTIMIZE_NODE(ModuleStatement)
 DONT_OPTIMIZE_NODE(WithStatement)
 DONT_OPTIMIZE_NODE(TryCatchStatement)
 DONT_OPTIMIZE_NODE(TryFinallyStatement)
diff --git a/deps/v8/src/ast.h b/deps/v8/src/ast.h
index e72296cff7..d299f19a23 100644
--- a/deps/v8/src/ast.h
+++ b/deps/v8/src/ast.h
@@ -75,6 +75,7 @@ namespace internal {
 
 #define STATEMENT_NODE_LIST(V)                  \
   V(Block)                                      \
+  V(ModuleStatement)                            \
   V(ExpressionStatement)                        \
   V(EmptyStatement)                             \
   V(IfStatement)                                \
@@ -522,7 +523,7 @@ class ModuleDeclaration: public Declaration {
   ModuleDeclaration(VariableProxy* proxy,
                     Module* module,
                     Scope* scope)
-      : Declaration(proxy, LET, scope),
+      : Declaration(proxy, MODULE, scope),
         module_(module) {
   }
 
@@ -645,6 +646,25 @@ class ModuleUrl: public Module {
 };
 
 
+class ModuleStatement: public Statement {
+ public:
+  DECLARE_NODE_TYPE(ModuleStatement)
+
+  VariableProxy* proxy() const { return proxy_; }
+  Block* body() const { return body_; }
+
+ protected:
+  ModuleStatement(VariableProxy* proxy, Block* body)
+      : proxy_(proxy),
+        body_(body) {
+  }
+
+ private:
+  VariableProxy* proxy_;
+  Block* body_;
+};
+
+
 class IterationStatement: public BreakableStatement {
  public:
   // Type testing & conversion.
@@ -1417,7 +1437,7 @@ class VariableProxy: public Expression {
   void MarkAsTrivial() { is_trivial_ = true; }
   void MarkAsLValue() { is_lvalue_ = true; }
 
-  // Bind this proxy to the variable var.
+  // Bind this proxy to the variable var. Interfaces must match.
   void BindTo(Variable* var);
 
  protected:
@@ -1777,9 +1797,6 @@ class CompareOperation: public Expression {
 
   // Type feedback information.
   TypeFeedbackId CompareOperationFeedbackId() const { return reuse(id()); }
-  void RecordTypeFeedback(TypeFeedbackOracle* oracle);
-  bool IsSmiCompare() { return compare_type_ == SMI_ONLY; }
-  bool IsObjectCompare() { return compare_type_ == OBJECT_ONLY; }
 
   // Match special cases.
   bool IsLiteralCompareTypeof(Expression** expr, Handle<String>* check);
@@ -1796,8 +1813,7 @@ class CompareOperation: public Expression {
         op_(op),
         left_(left),
         right_(right),
-        pos_(pos),
-        compare_type_(NONE) {
+        pos_(pos) {
     ASSERT(Token::IsCompareOp(op));
   }
 
@@ -1806,9 +1822,6 @@ class CompareOperation: public Expression {
   Expression* left_;
   Expression* right_;
   int pos_;
-
-  enum CompareTypeFeedback { NONE, SMI_ONLY, OBJECT_ONLY };
-  CompareTypeFeedback compare_type_;
 };
 
 
@@ -1870,15 +1883,6 @@ class Assignment: public Expression {
   // This check relies on the definition order of token in token.h.
   bool is_compound() const { return op() > Token::ASSIGN; }
 
-  // An initialization block is a series of statments of the form
-  // x.y.z.a = ...; x.y.z.b = ...; etc. The parser marks the beginning and
-  // ending of these blocks to allow for optimizations of initialization
-  // blocks.
-  bool starts_initialization_block() { return block_start_; }
-  bool ends_initialization_block() { return block_end_; }
-  void mark_block_start() { block_start_ = true; }
-  void mark_block_end() { block_end_ = true; }
-
   BailoutId AssignmentId() const { return assignment_id_; }
 
   // Type feedback information.
@@ -1911,9 +1915,6 @@ class Assignment: public Expression {
   BinaryOperation* binary_operation_;
   const BailoutId assignment_id_;
 
-  bool block_start_;
-  bool block_end_;
-
   bool is_monomorphic_;
   SmallMapList receiver_types_;
 };
@@ -2659,6 +2660,11 @@ class AstNodeFactory BASE_EMBEDDED {
   STATEMENT_WITH_LABELS(SwitchStatement)
 #undef STATEMENT_WITH_LABELS
 
+  ModuleStatement* NewModuleStatement(VariableProxy* proxy, Block* body) {
+    ModuleStatement* stmt = new(zone_) ModuleStatement(proxy, body);
+    VISIT_AND_RETURN(ModuleStatement, stmt)
+  }
+
   ExpressionStatement* NewExpressionStatement(Expression* expression) {
     ExpressionStatement* stmt = new(zone_) ExpressionStatement(expression);
     VISIT_AND_RETURN(ExpressionStatement, stmt)
diff --git a/deps/v8/src/atomicops.h b/deps/v8/src/atomicops.h
index e2057ed073..da33b29685 100644
--- a/deps/v8/src/atomicops.h
+++ b/deps/v8/src/atomicops.h
@@ -69,7 +69,11 @@ typedef intptr_t Atomic64;
 
 // Use AtomicWord for a machine-sized pointer.  It will use the Atomic32 or
 // Atomic64 routines below, depending on your architecture.
+#if defined(__OpenBSD__) && defined(__i386__)
+typedef Atomic32 AtomicWord;
+#else
 typedef intptr_t AtomicWord;
+#endif
 
 // Atomically execute:
 //      result = *ptr;
@@ -147,7 +151,9 @@ Atomic64 Release_Load(volatile const Atomic64* ptr);
 } }  // namespace v8::internal
 
 // Include our platform specific implementation.
-#if defined(_MSC_VER) && \
+#if defined(THREAD_SANITIZER)
+#include "atomicops_internals_tsan.h"
+#elif defined(_MSC_VER) && \
   (defined(V8_HOST_ARCH_IA32) || defined(V8_HOST_ARCH_X64))
 #include "atomicops_internals_x86_msvc.h"
 #elif defined(__APPLE__) && \
diff --git a/deps/v8/src/atomicops_internals_tsan.h b/deps/v8/src/atomicops_internals_tsan.h
new file mode 100644
index 0000000000..6559336ad9
--- /dev/null
+++ b/deps/v8/src/atomicops_internals_tsan.h
@@ -0,0 +1,335 @@
+// Copyright 2012 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+
+// This file is an internal atomic implementation for compiler-based
+// ThreadSanitizer. Use base/atomicops.h instead.
+
+#ifndef V8_ATOMICOPS_INTERNALS_TSAN_H_
+#define V8_ATOMICOPS_INTERNALS_TSAN_H_
+
+// This struct is not part of the public API of this module; clients may not
+// use it.  (However, it's exported via BASE_EXPORT because clients implicitly
+// do use it at link time by inlining these functions.)
+// Features of this x86.  Values may not be correct before main() is run,
+// but are set conservatively.
+struct AtomicOps_x86CPUFeatureStruct {
+  bool has_amd_lock_mb_bug;  // Processor has AMD memory-barrier bug; do lfence
+                             // after acquire compare-and-swap.
+  bool has_sse2;             // Processor has SSE2.
+};
+extern struct AtomicOps_x86CPUFeatureStruct
+    AtomicOps_Internalx86CPUFeatures;
+
+#define ATOMICOPS_COMPILER_BARRIER() __asm__ __volatile__("" : : : "memory")
+
+namespace v8 {
+namespace internal {
+
+#ifndef TSAN_INTERFACE_ATOMIC_H
+#define TSAN_INTERFACE_ATOMIC_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef char  __tsan_atomic8;
+typedef short __tsan_atomic16;  // NOLINT
+typedef int   __tsan_atomic32;
+typedef long  __tsan_atomic64;  // NOLINT
+
+typedef enum {
+  __tsan_memory_order_relaxed = (1 << 0) + 100500,
+  __tsan_memory_order_consume = (1 << 1) + 100500,
+  __tsan_memory_order_acquire = (1 << 2) + 100500,
+  __tsan_memory_order_release = (1 << 3) + 100500,
+  __tsan_memory_order_acq_rel = (1 << 4) + 100500,
+  __tsan_memory_order_seq_cst = (1 << 5) + 100500,
+} __tsan_memory_order;
+
+__tsan_atomic8 __tsan_atomic8_load(const volatile __tsan_atomic8* a,
+    __tsan_memory_order mo);
+__tsan_atomic16 __tsan_atomic16_load(const volatile __tsan_atomic16* a,
+    __tsan_memory_order mo);
+__tsan_atomic32 __tsan_atomic32_load(const volatile __tsan_atomic32* a,
+    __tsan_memory_order mo);
+__tsan_atomic64 __tsan_atomic64_load(const volatile __tsan_atomic64* a,
+    __tsan_memory_order mo);
+
+void __tsan_atomic8_store(volatile __tsan_atomic8* a, __tsan_atomic8 v,
+    __tsan_memory_order mo);
+void __tsan_atomic16_store(volatile __tsan_atomic16* a, __tsan_atomic16 v,
+    __tsan_memory_order mo);
+void __tsan_atomic32_store(volatile __tsan_atomic32* a, __tsan_atomic32 v,
+    __tsan_memory_order mo);
+void __tsan_atomic64_store(volatile __tsan_atomic64* a, __tsan_atomic64 v,
+    __tsan_memory_order mo);
+
+__tsan_atomic8 __tsan_atomic8_exchange(volatile __tsan_atomic8* a,
+    __tsan_atomic8 v, __tsan_memory_order mo);
+__tsan_atomic16 __tsan_atomic16_exchange(volatile __tsan_atomic16* a,
+    __tsan_atomic16 v, __tsan_memory_order mo);
+__tsan_atomic32 __tsan_atomic32_exchange(volatile __tsan_atomic32* a,
+    __tsan_atomic32 v, __tsan_memory_order mo);
+__tsan_atomic64 __tsan_atomic64_exchange(volatile __tsan_atomic64* a,
+    __tsan_atomic64 v, __tsan_memory_order mo);
+
+__tsan_atomic8 __tsan_atomic8_fetch_add(volatile __tsan_atomic8* a,
+    __tsan_atomic8 v, __tsan_memory_order mo);
+__tsan_atomic16 __tsan_atomic16_fetch_add(volatile __tsan_atomic16* a,
+    __tsan_atomic16 v, __tsan_memory_order mo);
+__tsan_atomic32 __tsan_atomic32_fetch_add(volatile __tsan_atomic32* a,
+    __tsan_atomic32 v, __tsan_memory_order mo);
+__tsan_atomic64 __tsan_atomic64_fetch_add(volatile __tsan_atomic64* a,
+    __tsan_atomic64 v, __tsan_memory_order mo);
+
+__tsan_atomic8 __tsan_atomic8_fetch_and(volatile __tsan_atomic8* a,
+    __tsan_atomic8 v, __tsan_memory_order mo);
+__tsan_atomic16 __tsan_atomic16_fetch_and(volatile __tsan_atomic16* a,
+    __tsan_atomic16 v, __tsan_memory_order mo);
+__tsan_atomic32 __tsan_atomic32_fetch_and(volatile __tsan_atomic32* a,
+    __tsan_atomic32 v, __tsan_memory_order mo);
+__tsan_atomic64 __tsan_atomic64_fetch_and(volatile __tsan_atomic64* a,
+    __tsan_atomic64 v, __tsan_memory_order mo);
+
+__tsan_atomic8 __tsan_atomic8_fetch_or(volatile __tsan_atomic8* a,
+    __tsan_atomic8 v, __tsan_memory_order mo);
+__tsan_atomic16 __tsan_atomic16_fetch_or(volatile __tsan_atomic16* a,
+    __tsan_atomic16 v, __tsan_memory_order mo);
+__tsan_atomic32 __tsan_atomic32_fetch_or(volatile __tsan_atomic32* a,
+    __tsan_atomic32 v, __tsan_memory_order mo);
+__tsan_atomic64 __tsan_atomic64_fetch_or(volatile __tsan_atomic64* a,
+    __tsan_atomic64 v, __tsan_memory_order mo);
+
+__tsan_atomic8 __tsan_atomic8_fetch_xor(volatile __tsan_atomic8* a,
+    __tsan_atomic8 v, __tsan_memory_order mo);
+__tsan_atomic16 __tsan_atomic16_fetch_xor(volatile __tsan_atomic16* a,
+    __tsan_atomic16 v, __tsan_memory_order mo);
+__tsan_atomic32 __tsan_atomic32_fetch_xor(volatile __tsan_atomic32* a,
+    __tsan_atomic32 v, __tsan_memory_order mo);
+__tsan_atomic64 __tsan_atomic64_fetch_xor(volatile __tsan_atomic64* a,
+    __tsan_atomic64 v, __tsan_memory_order mo);
+
+int __tsan_atomic8_compare_exchange_weak(volatile __tsan_atomic8* a,
+    __tsan_atomic8* c, __tsan_atomic8 v, __tsan_memory_order mo);
+int __tsan_atomic16_compare_exchange_weak(volatile __tsan_atomic16* a,
+    __tsan_atomic16* c, __tsan_atomic16 v, __tsan_memory_order mo);
+int __tsan_atomic32_compare_exchange_weak(volatile __tsan_atomic32* a,
+    __tsan_atomic32* c, __tsan_atomic32 v, __tsan_memory_order mo);
+int __tsan_atomic64_compare_exchange_weak(volatile __tsan_atomic64* a,
+    __tsan_atomic64* c, __tsan_atomic64 v, __tsan_memory_order mo);
+
+int __tsan_atomic8_compare_exchange_strong(volatile __tsan_atomic8* a,
+    __tsan_atomic8* c, __tsan_atomic8 v, __tsan_memory_order mo);
+int __tsan_atomic16_compare_exchange_strong(volatile __tsan_atomic16* a,
+    __tsan_atomic16* c, __tsan_atomic16 v, __tsan_memory_order mo);
+int __tsan_atomic32_compare_exchange_strong(volatile __tsan_atomic32* a,
+    __tsan_atomic32* c, __tsan_atomic32 v, __tsan_memory_order mo);
+int __tsan_atomic64_compare_exchange_strong(volatile __tsan_atomic64* a,
+    __tsan_atomic64* c, __tsan_atomic64 v, __tsan_memory_order mo);
+
+void __tsan_atomic_thread_fence(__tsan_memory_order mo);
+
+#ifdef __cplusplus
+}  // extern "C"
+#endif
+
+#endif  // #ifndef TSAN_INTERFACE_ATOMIC_H
+
+inline Atomic32 NoBarrier_CompareAndSwap(volatile Atomic32* ptr,
+                                         Atomic32 old_value,
+                                         Atomic32 new_value) {
+  Atomic32 cmp = old_value;
+  __tsan_atomic32_compare_exchange_strong(ptr, &cmp, new_value,
+                                          __tsan_memory_order_relaxed);
+  return cmp;
+}
+
+inline Atomic32 NoBarrier_AtomicExchange(volatile Atomic32* ptr,
+                                         Atomic32 new_value) {
+  return __tsan_atomic32_exchange(ptr, new_value,
+                                  __tsan_memory_order_relaxed);
+}
+
+inline Atomic32 Acquire_AtomicExchange(volatile Atomic32* ptr,
+                                       Atomic32 new_value) {
+  return __tsan_atomic32_exchange(ptr, new_value,
+                                  __tsan_memory_order_acquire);
+}
+
+inline Atomic32 Release_AtomicExchange(volatile Atomic32* ptr,
+                                       Atomic32 new_value) {
+  return __tsan_atomic32_exchange(ptr, new_value,
+                                  __tsan_memory_order_release);
+}
+
+inline Atomic32 NoBarrier_AtomicIncrement(volatile Atomic32* ptr,
+                                          Atomic32 increment) {
+  return increment + __tsan_atomic32_fetch_add(ptr, increment,
+                                               __tsan_memory_order_relaxed);
+}
+
+inline Atomic32 Barrier_AtomicIncrement(volatile Atomic32* ptr,
+                                        Atomic32 increment) {
+  return increment + __tsan_atomic32_fetch_add(ptr, increment,
+                                               __tsan_memory_order_acq_rel);
+}
+
+inline Atomic32 Acquire_CompareAndSwap(volatile Atomic32* ptr,
+                                       Atomic32 old_value,
+                                       Atomic32 new_value) {
+  Atomic32 cmp = old_value;
+  __tsan_atomic32_compare_exchange_strong(ptr, &cmp, new_value,
+                                          __tsan_memory_order_acquire);
+  return cmp;
+}
+
+inline Atomic32 Release_CompareAndSwap(volatile Atomic32* ptr,
+                                       Atomic32 old_value,
+                                       Atomic32 new_value) {
+  Atomic32 cmp = old_value;
+  __tsan_atomic32_compare_exchange_strong(ptr, &cmp, new_value,
+                                          __tsan_memory_order_release);
+  return cmp;
+}
+
+inline void NoBarrier_Store(volatile Atomic32* ptr, Atomic32 value) {
+  __tsan_atomic32_store(ptr, value, __tsan_memory_order_relaxed);
+}
+
+inline void Acquire_Store(volatile Atomic32* ptr, Atomic32 value) {
+  __tsan_atomic32_store(ptr, value, __tsan_memory_order_relaxed);
+  __tsan_atomic_thread_fence(__tsan_memory_order_seq_cst);
+}
+
+inline void Release_Store(volatile Atomic32* ptr, Atomic32 value) {
+  __tsan_atomic32_store(ptr, value, __tsan_memory_order_release);
+}
+
+inline Atomic32 NoBarrier_Load(volatile const Atomic32* ptr) {
+  return __tsan_atomic32_load(ptr, __tsan_memory_order_relaxed);
+}
+
+inline Atomic32 Acquire_Load(volatile const Atomic32* ptr) {
+  return __tsan_atomic32_load(ptr, __tsan_memory_order_acquire);
+}
+
+inline Atomic32 Release_Load(volatile const Atomic32* ptr) {
+  __tsan_atomic_thread_fence(__tsan_memory_order_seq_cst);
+  return __tsan_atomic32_load(ptr, __tsan_memory_order_relaxed);
+}
+
+inline Atomic64 NoBarrier_CompareAndSwap(volatile Atomic64* ptr,
+                                         Atomic64 old_value,
+                                         Atomic64 new_value) {
+  Atomic64 cmp = old_value;
+  __tsan_atomic64_compare_exchange_strong(ptr, &cmp, new_value,
+                                          __tsan_memory_order_relaxed);
+  return cmp;
+}
+
+inline Atomic64 NoBarrier_AtomicExchange(volatile Atomic64* ptr,
+                                         Atomic64 new_value) {
+  return __tsan_atomic64_exchange(ptr, new_value, __tsan_memory_order_relaxed);
+}
+
+inline Atomic64 Acquire_AtomicExchange(volatile Atomic64* ptr,
+                                       Atomic64 new_value) {
+  return __tsan_atomic64_exchange(ptr, new_value, __tsan_memory_order_acquire);
+}
+
+inline Atomic64 Release_AtomicExchange(volatile Atomic64* ptr,
+                                       Atomic64 new_value) {
+  return __tsan_atomic64_exchange(ptr, new_value, __tsan_memory_order_release);
+}
+
+inline Atomic64 NoBarrier_AtomicIncrement(volatile Atomic64* ptr,
+                                          Atomic64 increment) {
+  return increment + __tsan_atomic64_fetch_add(ptr, increment,
+                                               __tsan_memory_order_relaxed);
+}
+
+inline Atomic64 Barrier_AtomicIncrement(volatile Atomic64* ptr,
+                                        Atomic64 increment) {
+  return increment + __tsan_atomic64_fetch_add(ptr, increment,
+                                               __tsan_memory_order_acq_rel);
+}
+
+inline void NoBarrier_Store(volatile Atomic64* ptr, Atomic64 value) {
+  __tsan_atomic64_store(ptr, value, __tsan_memory_order_relaxed);
+}
+
+inline void Acquire_Store(volatile Atomic64* ptr, Atomic64 value) {
+  __tsan_atomic64_store(ptr, value, __tsan_memory_order_relaxed);
+  __tsan_atomic_thread_fence(__tsan_memory_order_seq_cst);
+}
+
+inline void Release_Store(volatile Atomic64* ptr, Atomic64 value) {
+  __tsan_atomic64_store(ptr, value, __tsan_memory_order_release);
+}
+
+inline Atomic64 NoBarrier_Load(volatile const Atomic64* ptr) {
+  return __tsan_atomic64_load(ptr, __tsan_memory_order_relaxed);
+}
+
+inline Atomic64 Acquire_Load(volatile const Atomic64* ptr) {
+  return __tsan_atomic64_load(ptr, __tsan_memory_order_acquire);
+}
+
+inline Atomic64 Release_Load(volatile const Atomic64* ptr) {
+  __tsan_atomic_thread_fence(__tsan_memory_order_seq_cst);
+  return __tsan_atomic64_load(ptr, __tsan_memory_order_relaxed);
+}
+
+inline Atomic64 Acquire_CompareAndSwap(volatile Atomic64* ptr,
+                                       Atomic64 old_value,
+                                       Atomic64 new_value) {
+  Atomic64 cmp = old_value;
+  __tsan_atomic64_compare_exchange_strong(ptr, &cmp, new_value,
+                                          __tsan_memory_order_acquire);
+  return cmp;
+}
+
+inline Atomic64 Release_CompareAndSwap(volatile Atomic64* ptr,
+                                       Atomic64 old_value,
+                                       Atomic64 new_value) {
+  Atomic64 cmp = old_value;
+  __tsan_atomic64_compare_exchange_strong(ptr, &cmp, new_value,
+                                          __tsan_memory_order_release);
+  return cmp;
+}
+
+inline void MemoryBarrier() {
+  __tsan_atomic_thread_fence(__tsan_memory_order_seq_cst);
+}
+
+}  // namespace internal
+}  // namespace v8
+
+#undef ATOMICOPS_COMPILER_BARRIER
+
+#endif  // V8_ATOMICOPS_INTERNALS_TSAN_H_
diff --git a/deps/v8/src/bootstrapper.cc b/deps/v8/src/bootstrapper.cc
index 992659edce..8d529506f2 100644
--- a/deps/v8/src/bootstrapper.cc
+++ b/deps/v8/src/bootstrapper.cc
@@ -384,7 +384,7 @@ static Handle<JSFunction> InstallFunction(Handle<JSObject> target,
 void Genesis::SetFunctionInstanceDescriptor(
     Handle<Map> map, PrototypePropertyMode prototypeMode) {
   int size = (prototypeMode == DONT_ADD_PROTOTYPE) ? 4 : 5;
-  Handle<DescriptorArray> descriptors(factory()->NewDescriptorArray(size));
+  Handle<DescriptorArray> descriptors(factory()->NewDescriptorArray(0, size));
   DescriptorArray::WhitenessWitness witness(*descriptors);
 
   Handle<Foreign> length(factory()->NewForeign(&Accessors::FunctionLength));
@@ -397,7 +397,7 @@ void Genesis::SetFunctionInstanceDescriptor(
   }
   PropertyAttributes attribs = static_cast<PropertyAttributes>(
       DONT_ENUM | DONT_DELETE | READ_ONLY);
-  Map::SetDescriptors(map, descriptors);
+  map->set_instance_descriptors(*descriptors);
 
   {  // Add length.
     CallbacksDescriptor d(*factory()->length_symbol(), *length, attribs);
@@ -525,7 +525,7 @@ Handle<JSFunction> Genesis::CreateEmptyFunction(Isolate* isolate) {
 void Genesis::SetStrictFunctionInstanceDescriptor(
     Handle<Map> map, PrototypePropertyMode prototypeMode) {
   int size = (prototypeMode == DONT_ADD_PROTOTYPE) ? 4 : 5;
-  Handle<DescriptorArray> descriptors(factory()->NewDescriptorArray(size));
+  Handle<DescriptorArray> descriptors(factory()->NewDescriptorArray(0, size));
   DescriptorArray::WhitenessWitness witness(*descriptors);
 
   Handle<Foreign> length(factory()->NewForeign(&Accessors::FunctionLength));
@@ -538,7 +538,7 @@ void Genesis::SetStrictFunctionInstanceDescriptor(
   }
   PropertyAttributes attribs = static_cast<PropertyAttributes>(
       DONT_ENUM | DONT_DELETE);
-  Map::SetDescriptors(map, descriptors);
+  map->set_instance_descriptors(*descriptors);
 
   {  // Add length.
     CallbacksDescriptor d(*factory()->length_symbol(), *length, attribs);
@@ -637,7 +637,7 @@ static void SetAccessors(Handle<Map> map,
                          Handle<String> name,
                          Handle<JSFunction> func) {
   DescriptorArray* descs = map->instance_descriptors();
-  int number = descs->Search(*name);
+  int number = descs->SearchWithCache(*name, *map);
   AccessorPair* accessors = AccessorPair::cast(descs->GetValue(number));
   accessors->set_getter(*func);
   accessors->set_setter(*func);
@@ -868,13 +868,14 @@ bool Genesis::InitializeGlobal(Handle<GlobalObject> inner_global,
     array_function->shared()->set_length(1);
 
     Handle<Map> initial_map(array_function->initial_map());
-    Handle<DescriptorArray> array_descriptors(factory->NewDescriptorArray(1));
+    Handle<DescriptorArray> array_descriptors(
+        factory->NewDescriptorArray(0, 1));
     DescriptorArray::WhitenessWitness witness(*array_descriptors);
 
     Handle<Foreign> array_length(factory->NewForeign(&Accessors::ArrayLength));
     PropertyAttributes attribs = static_cast<PropertyAttributes>(
         DONT_ENUM | DONT_DELETE);
-    Map::SetDescriptors(initial_map, array_descriptors);
+    initial_map->set_instance_descriptors(*array_descriptors);
 
     {  // Add length.
       CallbacksDescriptor d(*factory->length_symbol(), *array_length, attribs);
@@ -915,14 +916,15 @@ bool Genesis::InitializeGlobal(Handle<GlobalObject> inner_global,
 
     Handle<Map> string_map =
         Handle<Map>(native_context()->string_function()->initial_map());
-    Handle<DescriptorArray> string_descriptors(factory->NewDescriptorArray(1));
+    Handle<DescriptorArray> string_descriptors(
+        factory->NewDescriptorArray(0, 1));
     DescriptorArray::WhitenessWitness witness(*string_descriptors);
 
     Handle<Foreign> string_length(
         factory->NewForeign(&Accessors::StringLength));
     PropertyAttributes attribs = static_cast<PropertyAttributes>(
         DONT_ENUM | DONT_DELETE | READ_ONLY);
-    Map::SetDescriptors(string_map, string_descriptors);
+    string_map->set_instance_descriptors(*string_descriptors);
 
     {  // Add length.
       CallbacksDescriptor d(*factory->length_symbol(), *string_length, attribs);
@@ -956,9 +958,9 @@ bool Genesis::InitializeGlobal(Handle<GlobalObject> inner_global,
 
     PropertyAttributes final =
         static_cast<PropertyAttributes>(DONT_ENUM | DONT_DELETE | READ_ONLY);
-    Handle<DescriptorArray> descriptors = factory->NewDescriptorArray(5);
+    Handle<DescriptorArray> descriptors = factory->NewDescriptorArray(0, 5);
     DescriptorArray::WhitenessWitness witness(*descriptors);
-    Map::SetDescriptors(initial_map, descriptors);
+    initial_map->set_instance_descriptors(*descriptors);
 
     {
       // ECMA-262, section 15.10.7.1.
@@ -1082,11 +1084,11 @@ bool Genesis::InitializeGlobal(Handle<GlobalObject> inner_global,
     LookupResult lookup(isolate);
     result->LocalLookup(heap->callee_symbol(), &lookup);
     ASSERT(lookup.IsField());
-    ASSERT(lookup.GetFieldIndex() == Heap::kArgumentsCalleeIndex);
+    ASSERT(lookup.GetFieldIndex().field_index() == Heap::kArgumentsCalleeIndex);
 
     result->LocalLookup(heap->length_symbol(), &lookup);
     ASSERT(lookup.IsField());
-    ASSERT(lookup.GetFieldIndex() == Heap::kArgumentsLengthIndex);
+    ASSERT(lookup.GetFieldIndex().field_index() == Heap::kArgumentsLengthIndex);
 
     ASSERT(result->map()->inobject_properties() > Heap::kArgumentsCalleeIndex);
     ASSERT(result->map()->inobject_properties() > Heap::kArgumentsLengthIndex);
@@ -1140,9 +1142,9 @@ bool Genesis::InitializeGlobal(Handle<GlobalObject> inner_global,
     Handle<Map> map = factory->NewMap(JS_OBJECT_TYPE,
                                       Heap::kArgumentsObjectSizeStrict);
     // Create the descriptor array for the arguments object.
-    Handle<DescriptorArray> descriptors = factory->NewDescriptorArray(3);
+    Handle<DescriptorArray> descriptors = factory->NewDescriptorArray(0, 3);
     DescriptorArray::WhitenessWitness witness(*descriptors);
-    Map::SetDescriptors(map, descriptors);
+    map->set_instance_descriptors(*descriptors);
 
     {  // length
       FieldDescriptor d(*factory->length_symbol(), 0, DONT_ENUM);
@@ -1184,7 +1186,7 @@ bool Genesis::InitializeGlobal(Handle<GlobalObject> inner_global,
     LookupResult lookup(isolate);
     result->LocalLookup(heap->length_symbol(), &lookup);
     ASSERT(lookup.IsField());
-    ASSERT(lookup.GetFieldIndex() == Heap::kArgumentsLengthIndex);
+    ASSERT(lookup.GetFieldIndex().field_index() == Heap::kArgumentsLengthIndex);
 
     ASSERT(result->map()->inobject_properties() > Heap::kArgumentsLengthIndex);
 
@@ -1238,8 +1240,9 @@ bool Genesis::InitializeGlobal(Handle<GlobalObject> inner_global,
   // Initialize the out of memory slot.
   native_context()->set_out_of_memory(heap->false_value());
 
-  // Initialize the data slot.
-  native_context()->set_data(heap->undefined_value());
+  // Initialize the embedder data slot.
+  Handle<FixedArray> embedder_data = factory->NewFixedArray(2);
+  native_context()->set_embedder_data(*embedder_data);
 
   {
     // Initialize the random seed slot.
@@ -1338,7 +1341,7 @@ bool Genesis::CompileScriptCached(Vector<const char> name,
   // If we can't find the function in the cache, we compile a new
   // function and insert it into the cache.
   if (cache == NULL || !cache->Lookup(name, &function_info)) {
-    ASSERT(source->IsAsciiRepresentation());
+    ASSERT(source->IsOneByteRepresentation());
     Handle<String> script_name = factory->NewStringFromUtf8(name);
     function_info = Compiler::Compile(
         source,
@@ -1413,6 +1416,11 @@ void Genesis::InstallExperimentalNativeFunctions() {
     INSTALL_NATIVE(JSFunction, "DerivedSetTrap", derived_set_trap);
     INSTALL_NATIVE(JSFunction, "ProxyEnumerate", proxy_enumerate);
   }
+  if (FLAG_harmony_observation) {
+    INSTALL_NATIVE(JSFunction, "NotifyChange", observers_notify_change);
+    INSTALL_NATIVE(JSFunction, "DeliverChangeRecords",
+                   observers_deliver_changes);
+  }
 }
 
 #undef INSTALL_NATIVE
@@ -1487,7 +1495,7 @@ bool Genesis::InstallNatives() {
     Handle<Map> script_map = Handle<Map>(script_fun->initial_map());
 
     Handle<DescriptorArray> script_descriptors(
-        factory()->NewDescriptorArray(13));
+        factory()->NewDescriptorArray(0, 13));
     DescriptorArray::WhitenessWitness witness(*script_descriptors);
 
     Handle<Foreign> script_source(
@@ -1532,7 +1540,7 @@ bool Genesis::InstallNatives() {
         factory()->NewForeign(&Accessors::ScriptEvalFromFunctionName));
     PropertyAttributes attribs =
         static_cast<PropertyAttributes>(DONT_ENUM | DONT_DELETE | READ_ONLY);
-    Map::SetDescriptors(script_map, script_descriptors);
+    script_map->set_instance_descriptors(*script_descriptors);
 
     {
       CallbacksDescriptor d(
@@ -1665,14 +1673,15 @@ bool Genesis::InstallNatives() {
 
     // Make "length" magic on instances.
     Handle<Map> initial_map(array_function->initial_map());
-    Handle<DescriptorArray> array_descriptors(factory()->NewDescriptorArray(1));
+    Handle<DescriptorArray> array_descriptors(
+        factory()->NewDescriptorArray(0, 1));
     DescriptorArray::WhitenessWitness witness(*array_descriptors);
 
     Handle<Foreign> array_length(factory()->NewForeign(
         &Accessors::ArrayLength));
     PropertyAttributes attribs = static_cast<PropertyAttributes>(
         DONT_ENUM | DONT_DELETE);
-    Map::SetDescriptors(initial_map, array_descriptors);
+    initial_map->set_instance_descriptors(*array_descriptors);
 
     {  // Add length.
       CallbacksDescriptor d(
@@ -1765,16 +1774,17 @@ bool Genesis::InstallNatives() {
 
     // Update map with length accessor from Array and add "index" and "input".
     Handle<DescriptorArray> reresult_descriptors =
-        factory()->NewDescriptorArray(3);
+        factory()->NewDescriptorArray(0, 3);
     DescriptorArray::WhitenessWitness witness(*reresult_descriptors);
-    Map::SetDescriptors(initial_map, reresult_descriptors);
+    initial_map->set_instance_descriptors(*reresult_descriptors);
 
     {
       JSFunction* array_function = native_context()->array_function();
       Handle<DescriptorArray> array_descriptors(
           array_function->initial_map()->instance_descriptors());
       String* length = heap()->length_symbol();
-      int old = array_descriptors->SearchWithCache(length);
+      int old = array_descriptors->SearchWithCache(
+          length, array_function->initial_map());
       ASSERT(old != DescriptorArray::kNotFound);
       CallbacksDescriptor desc(length,
                                array_descriptors->GetValue(old),
@@ -1802,7 +1812,7 @@ bool Genesis::InstallNatives() {
     native_context()->set_regexp_result_map(*initial_map);
   }
 
-#ifdef DEBUG
+#ifdef VERIFY_HEAP
   builtins->Verify();
 #endif
 
@@ -1824,6 +1834,11 @@ bool Genesis::InstallExperimentalNatives() {
                "native collection.js") == 0) {
       if (!CompileExperimentalBuiltin(isolate(), i)) return false;
     }
+    if (FLAG_harmony_observation &&
+        strcmp(ExperimentalNatives::GetScriptName(i).start(),
+               "native object-observe.js") == 0) {
+      if (!CompileExperimentalBuiltin(isolate(), i)) return false;
+    }
   }
 
   InstallExperimentalNativeFunctions();
diff --git a/deps/v8/src/bootstrapper.h b/deps/v8/src/bootstrapper.h
index 179e65c354..d61c0313f2 100644
--- a/deps/v8/src/bootstrapper.h
+++ b/deps/v8/src/bootstrapper.h
@@ -54,7 +54,7 @@ class SourceCodeCache BASE_EMBEDDED {
 
   bool Lookup(Vector<const char> name, Handle<SharedFunctionInfo>* handle) {
     for (int i = 0; i < cache_->length(); i+=2) {
-      SeqAsciiString* str = SeqAsciiString::cast(cache_->get(i));
+      SeqOneByteString* str = SeqOneByteString::cast(cache_->get(i));
       if (str->IsEqualTo(name)) {
         *handle = Handle<SharedFunctionInfo>(
             SharedFunctionInfo::cast(cache_->get(i + 1)));
diff --git a/deps/v8/src/builtins.cc b/deps/v8/src/builtins.cc
index ffaaf8b1ea..d62713db4c 100644
--- a/deps/v8/src/builtins.cc
+++ b/deps/v8/src/builtins.cc
@@ -268,7 +268,7 @@ static MaybeObject* ArrayCodeGenericCommon(Arguments* args,
     maybe_elms = heap->AllocateFixedArrayWithHoles(number_of_elements);
   }
   FixedArrayBase* elms;
-  if (!maybe_elms->To<FixedArrayBase>(&elms)) return maybe_elms;
+  if (!maybe_elms->To(&elms)) return maybe_elms;
 
   // Fill in the content
   switch (array->GetElementsKind()) {
@@ -325,6 +325,18 @@ BUILTIN(ArrayCodeGeneric) {
 }
 
 
+static void MoveDoubleElements(FixedDoubleArray* dst,
+                               int dst_index,
+                               FixedDoubleArray* src,
+                               int src_index,
+                               int len) {
+  if (len == 0) return;
+  memmove(dst->data_start() + dst_index,
+          src->data_start() + src_index,
+          len * kDoubleSize);
+}
+
+
 static void MoveElements(Heap* heap,
                          AssertNoAllocation* no_gc,
                          FixedArray* dst,
@@ -351,24 +363,39 @@ static void FillWithHoles(Heap* heap, FixedArray* dst, int from, int to) {
 }
 
 
-static FixedArray* LeftTrimFixedArray(Heap* heap,
-                                      FixedArray* elms,
-                                      int to_trim) {
+static void FillWithHoles(FixedDoubleArray* dst, int from, int to) {
+  for (int i = from; i < to; i++) {
+    dst->set_the_hole(i);
+  }
+}
+
+
+static FixedArrayBase* LeftTrimFixedArray(Heap* heap,
+                                          FixedArrayBase* elms,
+                                          int to_trim) {
+  Map* map = elms->map();
+  int entry_size;
+  if (elms->IsFixedArray()) {
+    entry_size = kPointerSize;
+  } else {
+    entry_size = kDoubleSize;
+  }
   ASSERT(elms->map() != HEAP->fixed_cow_array_map());
   // For now this trick is only applied to fixed arrays in new and paged space.
   // In large object space the object's start must coincide with chunk
   // and thus the trick is just not applicable.
   ASSERT(!HEAP->lo_space()->Contains(elms));
 
-  STATIC_ASSERT(FixedArray::kMapOffset == 0);
-  STATIC_ASSERT(FixedArray::kLengthOffset == kPointerSize);
-  STATIC_ASSERT(FixedArray::kHeaderSize == 2 * kPointerSize);
+  STATIC_ASSERT(FixedArrayBase::kMapOffset == 0);
+  STATIC_ASSERT(FixedArrayBase::kLengthOffset == kPointerSize);
+  STATIC_ASSERT(FixedArrayBase::kHeaderSize == 2 * kPointerSize);
 
   Object** former_start = HeapObject::RawField(elms, 0);
 
   const int len = elms->length();
 
-  if (to_trim > FixedArray::kHeaderSize / kPointerSize &&
+  if (to_trim * entry_size > FixedArrayBase::kHeaderSize &&
+      elms->IsFixedArray() &&
       !heap->new_space()->Contains(elms)) {
     // If we are doing a big trim in old space then we zap the space that was
     // formerly part of the array so that the GC (aided by the card-based
@@ -382,14 +409,15 @@ static FixedArray* LeftTrimFixedArray(Heap* heap,
   // Technically in new space this write might be omitted (except for
   // debug mode which iterates through the heap), but to play safer
   // we still do it.
-  heap->CreateFillerObjectAt(elms->address(), to_trim * kPointerSize);
+  heap->CreateFillerObjectAt(elms->address(), to_trim * entry_size);
 
-  former_start[to_trim] = heap->fixed_array_map();
-  former_start[to_trim + 1] = Smi::FromInt(len - to_trim);
+  int new_start_index = to_trim * (entry_size / kPointerSize);
+  former_start[new_start_index] = map;
+  former_start[new_start_index + 1] = Smi::FromInt(len - to_trim);
 
   // Maintain marking consistency for HeapObjectIterator and
   // IncrementalMarking.
-  int size_delta = to_trim * kPointerSize;
+  int size_delta = to_trim * entry_size;
   if (heap->marking()->TransferMark(elms->address(),
                                     elms->address() + size_delta)) {
     MemoryChunk::IncrementLiveBytesFromMutator(elms->address(), -size_delta);
@@ -397,8 +425,8 @@ static FixedArray* LeftTrimFixedArray(Heap* heap,
 
   HEAP_PROFILE(heap, ObjectMoveEvent(elms->address(),
                                      elms->address() + size_delta));
-  return FixedArray::cast(HeapObject::FromAddress(
-      elms->address() + to_trim * kPointerSize));
+  return FixedArrayBase::cast(HeapObject::FromAddress(
+      elms->address() + to_trim * entry_size));
 }
 
 
@@ -427,19 +455,14 @@ static inline MaybeObject* EnsureJSArrayWithWritableFastElements(
   Map* map = elms->map();
   if (map == heap->fixed_array_map()) {
     if (args == NULL || array->HasFastObjectElements()) return elms;
-    if (array->HasFastDoubleElements()) {
-      ASSERT(elms == heap->empty_fixed_array());
-      MaybeObject* maybe_transition =
-          array->TransitionElementsKind(FAST_ELEMENTS);
-      if (maybe_transition->IsFailure()) return maybe_transition;
-      return elms;
-    }
   } else if (map == heap->fixed_cow_array_map()) {
     MaybeObject* maybe_writable_result = array->EnsureWritableFastElements();
     if (args == NULL || array->HasFastObjectElements() ||
-        maybe_writable_result->IsFailure()) {
+        !maybe_writable_result->To(&elms)) {
       return maybe_writable_result;
     }
+  } else if (map == heap->fixed_double_array_map()) {
+    if (args == NULL) return elms;
   } else {
     return NULL;
   }
@@ -449,13 +472,28 @@ static inline MaybeObject* EnsureJSArrayWithWritableFastElements(
   int args_length = args->length();
   if (first_added_arg >= args_length) return array->elements();
 
-  MaybeObject* maybe_array = array->EnsureCanContainElements(
-      args,
-      first_added_arg,
-      args_length - first_added_arg,
-      DONT_ALLOW_DOUBLE_ELEMENTS);
-  if (maybe_array->IsFailure()) return maybe_array;
-  return array->elements();
+  ElementsKind origin_kind = array->map()->elements_kind();
+  ASSERT(!IsFastObjectElementsKind(origin_kind));
+  ElementsKind target_kind = origin_kind;
+  int arg_count = args->length() - first_added_arg;
+  Object** arguments = args->arguments() - first_added_arg - (arg_count - 1);
+  for (int i = 0; i < arg_count; i++) {
+    Object* arg = arguments[i];
+    if (arg->IsHeapObject()) {
+      if (arg->IsHeapNumber()) {
+        target_kind = FAST_DOUBLE_ELEMENTS;
+      } else {
+        target_kind = FAST_ELEMENTS;
+        break;
+      }
+    }
+  }
+  if (target_kind != origin_kind) {
+    MaybeObject* maybe_failure = array->TransitionElementsKind(target_kind);
+    if (maybe_failure->IsFailure()) return maybe_failure;
+    return array->elements();
+  }
+  return elms;
 }
 
 
@@ -499,127 +537,200 @@ MUST_USE_RESULT static MaybeObject* CallJsBuiltin(
 BUILTIN(ArrayPush) {
   Heap* heap = isolate->heap();
   Object* receiver = *args.receiver();
-  Object* elms_obj;
-  { MaybeObject* maybe_elms_obj =
-        EnsureJSArrayWithWritableFastElements(heap, receiver, &args, 1);
-    if (maybe_elms_obj == NULL) {
-      return CallJsBuiltin(isolate, "ArrayPush", args);
-    }
-    if (!maybe_elms_obj->ToObject(&elms_obj)) return maybe_elms_obj;
+  FixedArrayBase* elms_obj;
+  MaybeObject* maybe_elms_obj =
+      EnsureJSArrayWithWritableFastElements(heap, receiver, &args, 1);
+  if (maybe_elms_obj == NULL) {
+    return CallJsBuiltin(isolate, "ArrayPush", args);
   }
-  FixedArray* elms = FixedArray::cast(elms_obj);
-  JSArray* array = JSArray::cast(receiver);
+  if (!maybe_elms_obj->To(&elms_obj)) return maybe_elms_obj;
 
-  int len = Smi::cast(array->length())->value();
-  int to_add = args.length() - 1;
-  if (to_add == 0) {
-    return Smi::FromInt(len);
+  if (FLAG_harmony_observation &&
+      JSObject::cast(receiver)->map()->is_observed()) {
+    return CallJsBuiltin(isolate, "ArrayPush", args);
   }
-  // Currently fixed arrays cannot grow too big, so
-  // we should never hit this case.
-  ASSERT(to_add <= (Smi::kMaxValue - len));
 
-  int new_length = len + to_add;
+  JSArray* array = JSArray::cast(receiver);
+  ElementsKind kind = array->GetElementsKind();
 
-  if (new_length > elms->length()) {
-    // New backing storage is needed.
-    int capacity = new_length + (new_length >> 1) + 16;
-    Object* obj;
-    { MaybeObject* maybe_obj = heap->AllocateUninitializedFixedArray(capacity);
-      if (!maybe_obj->ToObject(&obj)) return maybe_obj;
+  if (IsFastSmiOrObjectElementsKind(kind)) {
+    FixedArray* elms = FixedArray::cast(elms_obj);
+
+    int len = Smi::cast(array->length())->value();
+    int to_add = args.length() - 1;
+    if (to_add == 0) {
+      return Smi::FromInt(len);
     }
-    FixedArray* new_elms = FixedArray::cast(obj);
+    // Currently fixed arrays cannot grow too big, so
+    // we should never hit this case.
+    ASSERT(to_add <= (Smi::kMaxValue - len));
 
-    ElementsKind kind = array->GetElementsKind();
-    CopyObjectToObjectElements(elms, kind, 0, new_elms, kind, 0, len);
-    FillWithHoles(heap, new_elms, new_length, capacity);
+    int new_length = len + to_add;
 
-    elms = new_elms;
-  }
+    if (new_length > elms->length()) {
+      // New backing storage is needed.
+      int capacity = new_length + (new_length >> 1) + 16;
+      FixedArray* new_elms;
+      MaybeObject* maybe_obj = heap->AllocateUninitializedFixedArray(capacity);
+      if (!maybe_obj->To(&new_elms)) return maybe_obj;
 
-  // Add the provided values.
-  AssertNoAllocation no_gc;
-  WriteBarrierMode mode = elms->GetWriteBarrierMode(no_gc);
-  for (int index = 0; index < to_add; index++) {
-    elms->set(index + len, args[index + 1], mode);
-  }
+      ElementsAccessor* accessor = array->GetElementsAccessor();
+      MaybeObject* maybe_failure = accessor->CopyElements(
+           NULL, 0, new_elms, kind, 0,
+           ElementsAccessor::kCopyToEndAndInitializeToHole, elms_obj);
+      ASSERT(!maybe_failure->IsFailure());
+      USE(maybe_failure);
 
-  if (elms != array->elements()) {
-    array->set_elements(elms);
-  }
+      elms = new_elms;
+    }
 
-  // Set the length.
-  array->set_length(Smi::FromInt(new_length));
-  return Smi::FromInt(new_length);
+    // Add the provided values.
+    AssertNoAllocation no_gc;
+    WriteBarrierMode mode = elms->GetWriteBarrierMode(no_gc);
+    for (int index = 0; index < to_add; index++) {
+      elms->set(index + len, args[index + 1], mode);
+    }
+
+    if (elms != array->elements()) {
+      array->set_elements(elms);
+    }
+
+    // Set the length.
+    array->set_length(Smi::FromInt(new_length));
+    return Smi::FromInt(new_length);
+  } else {
+    int len = Smi::cast(array->length())->value();
+    int elms_len = elms_obj->length();
+
+    int to_add = args.length() - 1;
+    if (to_add == 0) {
+      return Smi::FromInt(len);
+    }
+    // Currently fixed arrays cannot grow too big, so
+    // we should never hit this case.
+    ASSERT(to_add <= (Smi::kMaxValue - len));
+
+    int new_length = len + to_add;
+
+    FixedDoubleArray* new_elms;
+
+    if (new_length > elms_len) {
+      // New backing storage is needed.
+      int capacity = new_length + (new_length >> 1) + 16;
+      MaybeObject* maybe_obj =
+          heap->AllocateUninitializedFixedDoubleArray(capacity);
+      if (!maybe_obj->To(&new_elms)) return maybe_obj;
+
+      ElementsAccessor* accessor = array->GetElementsAccessor();
+      MaybeObject* maybe_failure = accessor->CopyElements(
+              NULL, 0, new_elms, kind, 0,
+              ElementsAccessor::kCopyToEndAndInitializeToHole, elms_obj);
+      ASSERT(!maybe_failure->IsFailure());
+      USE(maybe_failure);
+    } else {
+      // to_add is > 0 and new_length <= elms_len, so elms_obj cannot be the
+      // empty_fixed_array.
+      new_elms = FixedDoubleArray::cast(elms_obj);
+    }
+
+    // Add the provided values.
+    AssertNoAllocation no_gc;
+    int index;
+    for (index = 0; index < to_add; index++) {
+      Object* arg = args[index + 1];
+      new_elms->set(index + len, arg->Number());
+    }
+
+    if (new_elms != array->elements()) {
+      array->set_elements(new_elms);
+    }
+
+    // Set the length.
+    array->set_length(Smi::FromInt(new_length));
+    return Smi::FromInt(new_length);
+  }
 }
 
 
 BUILTIN(ArrayPop) {
   Heap* heap = isolate->heap();
   Object* receiver = *args.receiver();
-  Object* elms_obj;
-  { MaybeObject* maybe_elms_obj =
-        EnsureJSArrayWithWritableFastElements(heap, receiver, NULL, 0);
-    if (maybe_elms_obj == NULL) return CallJsBuiltin(isolate, "ArrayPop", args);
-    if (!maybe_elms_obj->ToObject(&elms_obj)) return maybe_elms_obj;
-  }
-  FixedArray* elms = FixedArray::cast(elms_obj);
+  FixedArrayBase* elms_obj;
+  MaybeObject* maybe_elms =
+      EnsureJSArrayWithWritableFastElements(heap, receiver, NULL, 0);
+  if (maybe_elms == NULL) return CallJsBuiltin(isolate, "ArrayPop", args);
+  if (!maybe_elms->To(&elms_obj)) return maybe_elms;
+
   JSArray* array = JSArray::cast(receiver);
 
+  if (FLAG_harmony_observation && array->map()->is_observed()) {
+    return CallJsBuiltin(isolate, "ArrayPop", args);
+  }
+
   int len = Smi::cast(array->length())->value();
   if (len == 0) return heap->undefined_value();
 
-  // Get top element
-  MaybeObject* top = elms->get(len - 1);
-
-  // Set the length.
-  array->set_length(Smi::FromInt(len - 1));
-
-  if (!top->IsTheHole()) {
-    // Delete the top element.
-    elms->set_the_hole(len - 1);
-    return top;
+  ElementsAccessor* accessor = array->GetElementsAccessor();
+  int new_length = len - 1;
+  MaybeObject* maybe_result;
+  if (accessor->HasElement(array, array, new_length, elms_obj)) {
+    maybe_result = accessor->Get(array, array, new_length, elms_obj);
+  } else {
+    maybe_result = array->GetPrototype()->GetElement(len - 1);
   }
-
-  top = array->GetPrototype()->GetElement(len - 1);
-
-  return top;
+  if (maybe_result->IsFailure()) return maybe_result;
+  MaybeObject* maybe_failure =
+      accessor->SetLength(array, Smi::FromInt(new_length));
+  if (maybe_failure->IsFailure()) return maybe_failure;
+  return maybe_result;
 }
 
 
 BUILTIN(ArrayShift) {
   Heap* heap = isolate->heap();
   Object* receiver = *args.receiver();
-  Object* elms_obj;
-  { MaybeObject* maybe_elms_obj =
-        EnsureJSArrayWithWritableFastElements(heap, receiver, NULL, 0);
-    if (maybe_elms_obj == NULL)
-        return CallJsBuiltin(isolate, "ArrayShift", args);
-    if (!maybe_elms_obj->ToObject(&elms_obj)) return maybe_elms_obj;
-  }
+  FixedArrayBase* elms_obj;
+  MaybeObject* maybe_elms_obj =
+      EnsureJSArrayWithWritableFastElements(heap, receiver, NULL, 0);
+  if (maybe_elms_obj == NULL)
+      return CallJsBuiltin(isolate, "ArrayShift", args);
+  if (!maybe_elms_obj->To(&elms_obj)) return maybe_elms_obj;
+
   if (!IsJSArrayFastElementMovingAllowed(heap, JSArray::cast(receiver))) {
     return CallJsBuiltin(isolate, "ArrayShift", args);
   }
-  FixedArray* elms = FixedArray::cast(elms_obj);
   JSArray* array = JSArray::cast(receiver);
-  ASSERT(array->HasFastSmiOrObjectElements());
+
+  if (FLAG_harmony_observation && array->map()->is_observed()) {
+    return CallJsBuiltin(isolate, "ArrayShift", args);
+  }
 
   int len = Smi::cast(array->length())->value();
   if (len == 0) return heap->undefined_value();
 
   // Get first element
-  Object* first = elms->get(0);
+  ElementsAccessor* accessor = array->GetElementsAccessor();
+  Object* first;
+  MaybeObject* maybe_first = accessor->Get(receiver, array, 0, elms_obj);
+  if (!maybe_first->To(&first)) return maybe_first;
   if (first->IsTheHole()) {
     first = heap->undefined_value();
   }
 
-  if (!heap->lo_space()->Contains(elms)) {
-    array->set_elements(LeftTrimFixedArray(heap, elms, 1));
+  if (!heap->lo_space()->Contains(elms_obj)) {
+    array->set_elements(LeftTrimFixedArray(heap, elms_obj, 1));
   } else {
     // Shift the elements.
-    AssertNoAllocation no_gc;
-    MoveElements(heap, &no_gc, elms, 0, elms, 1, len - 1);
-    elms->set(len - 1, heap->the_hole_value());
+    if (elms_obj->IsFixedArray()) {
+      FixedArray* elms = FixedArray::cast(elms_obj);
+      AssertNoAllocation no_gc;
+      MoveElements(heap, &no_gc, elms, 0, elms, 1, len - 1);
+      elms->set(len - 1, heap->the_hole_value());
+    } else {
+      FixedDoubleArray* elms = FixedDoubleArray::cast(elms_obj);
+      MoveDoubleElements(elms, 0, elms, 1, len - 1);
+      elms->set_the_hole(len - 1);
+    }
   }
 
   // Set the length.
@@ -632,19 +743,25 @@ BUILTIN(ArrayShift) {
 BUILTIN(ArrayUnshift) {
   Heap* heap = isolate->heap();
   Object* receiver = *args.receiver();
-  Object* elms_obj;
-  { MaybeObject* maybe_elms_obj =
-        EnsureJSArrayWithWritableFastElements(heap, receiver, NULL, 0);
-    if (maybe_elms_obj == NULL)
-        return CallJsBuiltin(isolate, "ArrayUnshift", args);
-    if (!maybe_elms_obj->ToObject(&elms_obj)) return maybe_elms_obj;
-  }
+  FixedArrayBase* elms_obj;
+  MaybeObject* maybe_elms_obj =
+      EnsureJSArrayWithWritableFastElements(heap, receiver, NULL, 0);
+  if (maybe_elms_obj == NULL)
+      return CallJsBuiltin(isolate, "ArrayUnshift", args);
+  if (!maybe_elms_obj->To(&elms_obj)) return maybe_elms_obj;
+
   if (!IsJSArrayFastElementMovingAllowed(heap, JSArray::cast(receiver))) {
     return CallJsBuiltin(isolate, "ArrayUnshift", args);
   }
-  FixedArray* elms = FixedArray::cast(elms_obj);
   JSArray* array = JSArray::cast(receiver);
-  ASSERT(array->HasFastSmiOrObjectElements());
+  if (!array->HasFastSmiOrObjectElements()) {
+    return CallJsBuiltin(isolate, "ArrayUnshift", args);
+  }
+  FixedArray* elms = FixedArray::cast(elms_obj);
+
+  if (FLAG_harmony_observation && array->map()->is_observed()) {
+    return CallJsBuiltin(isolate, "ArrayUnshift", args);
+  }
 
   int len = Smi::cast(array->length())->value();
   int to_add = args.length() - 1;
@@ -661,14 +778,18 @@ BUILTIN(ArrayUnshift) {
   if (new_length > elms->length()) {
     // New backing storage is needed.
     int capacity = new_length + (new_length >> 1) + 16;
-    Object* obj;
-    { MaybeObject* maybe_obj = heap->AllocateUninitializedFixedArray(capacity);
-      if (!maybe_obj->ToObject(&obj)) return maybe_obj;
-    }
-    FixedArray* new_elms = FixedArray::cast(obj);
+    FixedArray* new_elms;
+    MaybeObject* maybe_elms = heap->AllocateUninitializedFixedArray(capacity);
+    if (!maybe_elms->To(&new_elms)) return maybe_elms;
+
     ElementsKind kind = array->GetElementsKind();
-    CopyObjectToObjectElements(elms, kind, 0, new_elms, kind, to_add, len);
-    FillWithHoles(heap, new_elms, new_length, capacity);
+    ElementsAccessor* accessor = array->GetElementsAccessor();
+    MaybeObject* maybe_failure = accessor->CopyElements(
+            NULL, 0, new_elms, kind, to_add,
+            ElementsAccessor::kCopyToEndAndInitializeToHole, elms);
+    ASSERT(!maybe_failure->IsFailure());
+    USE(maybe_failure);
+
     elms = new_elms;
     array->set_elements(elms);
   } else {
@@ -692,16 +813,20 @@ BUILTIN(ArrayUnshift) {
 BUILTIN(ArraySlice) {
   Heap* heap = isolate->heap();
   Object* receiver = *args.receiver();
-  FixedArray* elms;
+  FixedArrayBase* elms;
   int len = -1;
   if (receiver->IsJSArray()) {
     JSArray* array = JSArray::cast(receiver);
-    if (!array->HasFastSmiOrObjectElements() ||
-        !IsJSArrayFastElementMovingAllowed(heap, array)) {
+    if (!IsJSArrayFastElementMovingAllowed(heap, array)) {
+      return CallJsBuiltin(isolate, "ArraySlice", args);
+    }
+
+    if (array->HasFastElements()) {
+      elms = array->elements();
+    } else {
       return CallJsBuiltin(isolate, "ArraySlice", args);
     }
 
-    elms = FixedArray::cast(array->elements());
     len = Smi::cast(array->length())->value();
   } else {
     // Array.slice(arguments, ...) is quite a common idiom (notably more
@@ -710,15 +835,19 @@ BUILTIN(ArraySlice) {
         isolate->context()->native_context()->arguments_boilerplate()->map();
 
     bool is_arguments_object_with_fast_elements =
-        receiver->IsJSObject()
-        && JSObject::cast(receiver)->map() == arguments_map
-        && JSObject::cast(receiver)->HasFastSmiOrObjectElements();
+        receiver->IsJSObject() &&
+        JSObject::cast(receiver)->map() == arguments_map;
     if (!is_arguments_object_with_fast_elements) {
       return CallJsBuiltin(isolate, "ArraySlice", args);
     }
-    elms = FixedArray::cast(JSObject::cast(receiver)->elements());
-    Object* len_obj = JSObject::cast(receiver)
-        ->InObjectPropertyAt(Heap::kArgumentsLengthIndex);
+    JSObject* object = JSObject::cast(receiver);
+
+    if (object->HasFastElements()) {
+      elms = object->elements();
+    } else {
+      return CallJsBuiltin(isolate, "ArraySlice", args);
+    }
+    Object* len_obj = object->InObjectPropertyAt(Heap::kArgumentsLengthIndex);
     if (!len_obj->IsSmi()) {
       return CallJsBuiltin(isolate, "ArraySlice", args);
     }
@@ -726,12 +855,27 @@ BUILTIN(ArraySlice) {
     if (len > elms->length()) {
       return CallJsBuiltin(isolate, "ArraySlice", args);
     }
+  }
+
+  JSObject* object = JSObject::cast(receiver);
+  ElementsKind kind = object->GetElementsKind();
+
+  if (IsHoleyElementsKind(kind)) {
+    bool packed = true;
+    ElementsAccessor* accessor = ElementsAccessor::ForKind(kind);
     for (int i = 0; i < len; i++) {
-      if (elms->get(i) == heap->the_hole_value()) {
-        return CallJsBuiltin(isolate, "ArraySlice", args);
+      if (!accessor->HasElement(object, object, i, elms)) {
+        packed = false;
+        break;
       }
     }
+    if (packed) {
+      kind = GetPackedElementsKind(kind);
+    } else if (!receiver->IsJSArray()) {
+      return CallJsBuiltin(isolate, "ArraySlice", args);
+    }
   }
+
   ASSERT(len >= 0);
   int n_arguments = args.length() - 1;
 
@@ -744,6 +888,12 @@ BUILTIN(ArraySlice) {
     Object* arg1 = args[1];
     if (arg1->IsSmi()) {
       relative_start = Smi::cast(arg1)->value();
+    } else if (arg1->IsHeapNumber()) {
+      double start = HeapNumber::cast(arg1)->value();
+      if (start < kMinInt || start > kMaxInt) {
+        return CallJsBuiltin(isolate, "ArraySlice", args);
+      }
+      relative_start = static_cast<int>(start);
     } else if (!arg1->IsUndefined()) {
       return CallJsBuiltin(isolate, "ArraySlice", args);
     }
@@ -751,6 +901,12 @@ BUILTIN(ArraySlice) {
       Object* arg2 = args[2];
       if (arg2->IsSmi()) {
         relative_end = Smi::cast(arg2)->value();
+      } else if (arg2->IsHeapNumber()) {
+        double end = HeapNumber::cast(arg2)->value();
+        if (end < kMinInt || end > kMaxInt) {
+          return CallJsBuiltin(isolate, "ArraySlice", args);
+        }
+        relative_end = static_cast<int>(end);
       } else if (!arg2->IsUndefined()) {
         return CallJsBuiltin(isolate, "ArraySlice", args);
       }
@@ -765,21 +921,24 @@ BUILTIN(ArraySlice) {
   int final = (relative_end < 0) ? Max(len + relative_end, 0)
                                  : Min(relative_end, len);
 
-  ElementsKind elements_kind = JSObject::cast(receiver)->GetElementsKind();
-
   // Calculate the length of result array.
   int result_len = Max(final - k, 0);
 
-  MaybeObject* maybe_array =
-      heap->AllocateJSArrayAndStorage(elements_kind,
-                                      result_len,
-                                      result_len);
   JSArray* result_array;
+  MaybeObject* maybe_array = heap->AllocateJSArrayAndStorage(kind,
+                                                             result_len,
+                                                             result_len);
+
+  AssertNoAllocation no_gc;
+  if (result_len == 0) return maybe_array;
   if (!maybe_array->To(&result_array)) return maybe_array;
 
-  CopyObjectToObjectElements(elms, elements_kind, k,
-                             FixedArray::cast(result_array->elements()),
-                             elements_kind, 0, result_len);
+  ElementsAccessor* accessor = object->GetElementsAccessor();
+  MaybeObject* maybe_failure =
+      accessor->CopyElements(NULL, k, result_array->elements(),
+                             kind, 0, result_len, elms);
+  ASSERT(!maybe_failure->IsFailure());
+  USE(maybe_failure);
 
   return result_array;
 }
@@ -788,19 +947,22 @@ BUILTIN(ArraySlice) {
 BUILTIN(ArraySplice) {
   Heap* heap = isolate->heap();
   Object* receiver = *args.receiver();
-  Object* elms_obj;
-  { MaybeObject* maybe_elms_obj =
-        EnsureJSArrayWithWritableFastElements(heap, receiver, &args, 3);
-    if (maybe_elms_obj == NULL)
-        return CallJsBuiltin(isolate, "ArraySplice", args);
-    if (!maybe_elms_obj->ToObject(&elms_obj)) return maybe_elms_obj;
+  FixedArrayBase* elms_obj;
+  MaybeObject* maybe_elms =
+      EnsureJSArrayWithWritableFastElements(heap, receiver, &args, 3);
+  if (maybe_elms == NULL) {
+    return CallJsBuiltin(isolate, "ArraySplice", args);
   }
+  if (!maybe_elms->To(&elms_obj)) return maybe_elms;
+
   if (!IsJSArrayFastElementMovingAllowed(heap, JSArray::cast(receiver))) {
     return CallJsBuiltin(isolate, "ArraySplice", args);
   }
-  FixedArray* elms = FixedArray::cast(elms_obj);
   JSArray* array = JSArray::cast(receiver);
-  ASSERT(array->HasFastSmiOrObjectElements());
+
+  if (FLAG_harmony_observation && array->map()->is_observed()) {
+    return CallJsBuiltin(isolate, "ArraySplice", args);
+  }
 
   int len = Smi::cast(array->length())->value();
 
@@ -811,6 +973,12 @@ BUILTIN(ArraySplice) {
     Object* arg1 = args[1];
     if (arg1->IsSmi()) {
       relative_start = Smi::cast(arg1)->value();
+    } else if (arg1->IsHeapNumber()) {
+      double start = HeapNumber::cast(arg1)->value();
+      if (start < kMinInt || start > kMaxInt) {
+        return CallJsBuiltin(isolate, "ArraySplice", args);
+      }
+      relative_start = static_cast<int>(start);
     } else if (!arg1->IsUndefined()) {
       return CallJsBuiltin(isolate, "ArraySplice", args);
     }
@@ -840,51 +1008,84 @@ BUILTIN(ArraySplice) {
     actual_delete_count = Min(Max(value, 0), len - actual_start);
   }
 
+  ElementsKind elements_kind = array->GetElementsKind();
+
+  int item_count = (n_arguments > 1) ? (n_arguments - 2) : 0;
+  int new_length = len - actual_delete_count + item_count;
+
+  // For double mode we do not support changing the length.
+  if (new_length > len && IsFastDoubleElementsKind(elements_kind)) {
+    return CallJsBuiltin(isolate, "ArraySplice", args);
+  }
+
+  if (new_length == 0) {
+    MaybeObject* maybe_array = heap->AllocateJSArrayWithElements(
+        elms_obj, elements_kind, actual_delete_count);
+    if (maybe_array->IsFailure()) return maybe_array;
+    array->set_elements(heap->empty_fixed_array());
+    array->set_length(Smi::FromInt(0));
+    return maybe_array;
+  }
+
   JSArray* result_array = NULL;
-  ElementsKind elements_kind =
-      JSObject::cast(receiver)->GetElementsKind();
   MaybeObject* maybe_array =
       heap->AllocateJSArrayAndStorage(elements_kind,
                                       actual_delete_count,
                                       actual_delete_count);
   if (!maybe_array->To(&result_array)) return maybe_array;
 
-  {
-    // Fill newly created array.
-    CopyObjectToObjectElements(elms, elements_kind, actual_start,
-                               FixedArray::cast(result_array->elements()),
-                               elements_kind, 0, actual_delete_count);
+  if (actual_delete_count > 0) {
+    AssertNoAllocation no_gc;
+    ElementsAccessor* accessor = array->GetElementsAccessor();
+    MaybeObject* maybe_failure =
+        accessor->CopyElements(NULL, actual_start, result_array->elements(),
+                               elements_kind, 0, actual_delete_count, elms_obj);
+    // Cannot fail since the origin and target array are of the same elements
+    // kind.
+    ASSERT(!maybe_failure->IsFailure());
+    USE(maybe_failure);
   }
 
-  int item_count = (n_arguments > 1) ? (n_arguments - 2) : 0;
-  int new_length = len - actual_delete_count + item_count;
-
   bool elms_changed = false;
   if (item_count < actual_delete_count) {
     // Shrink the array.
-    const bool trim_array = !heap->lo_space()->Contains(elms) &&
+    const bool trim_array = !heap->lo_space()->Contains(elms_obj) &&
       ((actual_start + item_count) <
           (len - actual_delete_count - actual_start));
     if (trim_array) {
       const int delta = actual_delete_count - item_count;
 
-      {
+      if (elms_obj->IsFixedDoubleArray()) {
+        FixedDoubleArray* elms = FixedDoubleArray::cast(elms_obj);
+        MoveDoubleElements(elms, delta, elms, 0, actual_start);
+      } else {
+        FixedArray* elms = FixedArray::cast(elms_obj);
         AssertNoAllocation no_gc;
         MoveElements(heap, &no_gc, elms, delta, elms, 0, actual_start);
       }
 
-      elms = LeftTrimFixedArray(heap, elms, delta);
+      elms_obj = LeftTrimFixedArray(heap, elms_obj, delta);
 
       elms_changed = true;
     } else {
-      AssertNoAllocation no_gc;
-      MoveElements(heap, &no_gc,
-                   elms, actual_start + item_count,
-                   elms, actual_start + actual_delete_count,
-                   (len - actual_delete_count - actual_start));
-      FillWithHoles(heap, elms, new_length, len);
+      if (elms_obj->IsFixedDoubleArray()) {
+        FixedDoubleArray* elms = FixedDoubleArray::cast(elms_obj);
+        MoveDoubleElements(elms, actual_start + item_count,
+                           elms, actual_start + actual_delete_count,
+                           (len - actual_delete_count - actual_start));
+        FillWithHoles(elms, new_length, len);
+      } else {
+        FixedArray* elms = FixedArray::cast(elms_obj);
+        AssertNoAllocation no_gc;
+        MoveElements(heap, &no_gc,
+                     elms, actual_start + item_count,
+                     elms, actual_start + actual_delete_count,
+                     (len - actual_delete_count - actual_start));
+        FillWithHoles(heap, elms, new_length, len);
+      }
     }
   } else if (item_count > actual_delete_count) {
+    FixedArray* elms = FixedArray::cast(elms_obj);
     // Currently fixed arrays cannot grow too big, so
     // we should never hit this case.
     ASSERT((item_count - actual_delete_count) <= (Smi::kMaxValue - len));
@@ -893,28 +1094,29 @@ BUILTIN(ArraySplice) {
     if (new_length > elms->length()) {
       // New backing storage is needed.
       int capacity = new_length + (new_length >> 1) + 16;
-      Object* obj;
-      { MaybeObject* maybe_obj =
-            heap->AllocateUninitializedFixedArray(capacity);
-        if (!maybe_obj->ToObject(&obj)) return maybe_obj;
-      }
-      FixedArray* new_elms = FixedArray::cast(obj);
+      FixedArray* new_elms;
+      MaybeObject* maybe_obj = heap->AllocateUninitializedFixedArray(capacity);
+      if (!maybe_obj->To(&new_elms)) return maybe_obj;
 
-      {
+      AssertNoAllocation no_gc;
+
+      ElementsKind kind = array->GetElementsKind();
+      ElementsAccessor* accessor = array->GetElementsAccessor();
+      if (actual_start > 0) {
         // Copy the part before actual_start as is.
-        ElementsKind kind = array->GetElementsKind();
-        CopyObjectToObjectElements(elms, kind, 0,
-                                   new_elms, kind, 0, actual_start);
-        const int to_copy = len - actual_delete_count - actual_start;
-        CopyObjectToObjectElements(elms, kind,
-                                   actual_start + actual_delete_count,
-                                   new_elms, kind,
-                                   actual_start + item_count, to_copy);
+        MaybeObject* maybe_failure = accessor->CopyElements(
+            NULL, 0, new_elms, kind, 0, actual_start, elms);
+        ASSERT(!maybe_failure->IsFailure());
+        USE(maybe_failure);
       }
-
-      FillWithHoles(heap, new_elms, new_length, capacity);
-
-      elms = new_elms;
+      MaybeObject* maybe_failure = accessor->CopyElements(
+          NULL, actual_start + actual_delete_count, new_elms, kind,
+          actual_start + item_count,
+          ElementsAccessor::kCopyToEndAndInitializeToHole, elms);
+      ASSERT(!maybe_failure->IsFailure());
+      USE(maybe_failure);
+
+      elms_obj = new_elms;
       elms_changed = true;
     } else {
       AssertNoAllocation no_gc;
@@ -925,16 +1127,28 @@ BUILTIN(ArraySplice) {
     }
   }
 
-  AssertNoAllocation no_gc;
-  WriteBarrierMode mode = elms->GetWriteBarrierMode(no_gc);
-  for (int k = actual_start; k < actual_start + item_count; k++) {
-    elms->set(k, args[3 + k - actual_start], mode);
+  if (IsFastDoubleElementsKind(elements_kind)) {
+    FixedDoubleArray* elms = FixedDoubleArray::cast(elms_obj);
+    for (int k = actual_start; k < actual_start + item_count; k++) {
+      Object* arg = args[3 + k - actual_start];
+      if (arg->IsSmi()) {
+        elms->set(k, Smi::cast(arg)->value());
+      } else {
+        elms->set(k, HeapNumber::cast(arg)->value());
+      }
+    }
+  } else {
+    FixedArray* elms = FixedArray::cast(elms_obj);
+    AssertNoAllocation no_gc;
+    WriteBarrierMode mode = elms->GetWriteBarrierMode(no_gc);
+    for (int k = actual_start; k < actual_start + item_count; k++) {
+      elms->set(k, args[3 + k - actual_start], mode);
+    }
   }
 
   if (elms_changed) {
-    array->set_elements(elms);
+    array->set_elements(elms_obj);
   }
-
   // Set the length.
   array->set_length(Smi::FromInt(new_length));
 
@@ -956,14 +1170,15 @@ BUILTIN(ArrayConcat) {
   int n_arguments = args.length();
   int result_len = 0;
   ElementsKind elements_kind = GetInitialFastElementsKind();
+  bool has_double = false;
+  bool is_holey = false;
   for (int i = 0; i < n_arguments; i++) {
     Object* arg = args[i];
     if (!arg->IsJSArray() ||
-        !JSArray::cast(arg)->HasFastSmiOrObjectElements() ||
+        !JSArray::cast(arg)->HasFastElements() ||
         JSArray::cast(arg)->GetPrototype() != array_proto) {
       return CallJsBuiltin(isolate, "ArrayConcat", args);
     }
-
     int len = Smi::cast(JSArray::cast(arg)->length())->value();
 
     // We shouldn't overflow when adding another len.
@@ -973,47 +1188,51 @@ BUILTIN(ArrayConcat) {
     result_len += len;
     ASSERT(result_len >= 0);
 
-    if (result_len > FixedArray::kMaxLength) {
+    if (result_len > FixedDoubleArray::kMaxLength) {
       return CallJsBuiltin(isolate, "ArrayConcat", args);
     }
 
-    if (!JSArray::cast(arg)->HasFastSmiElements()) {
-      if (IsFastSmiElementsKind(elements_kind)) {
-        if (IsFastHoleyElementsKind(elements_kind)) {
-          elements_kind = FAST_HOLEY_ELEMENTS;
-        } else {
-          elements_kind = FAST_ELEMENTS;
-        }
-      }
-    }
-
-    if (JSArray::cast(arg)->HasFastHoleyElements()) {
-      elements_kind = GetHoleyElementsKind(elements_kind);
+    ElementsKind arg_kind = JSArray::cast(arg)->map()->elements_kind();
+    has_double = has_double || IsFastDoubleElementsKind(arg_kind);
+    is_holey = is_holey || IsFastHoleyElementsKind(arg_kind);
+    if (IsMoreGeneralElementsKindTransition(elements_kind, arg_kind)) {
+      elements_kind = arg_kind;
     }
   }
 
-  // Allocate result.
+  if (is_holey) elements_kind = GetHoleyElementsKind(elements_kind);
+
+  // If a double array is concatted into a fast elements array, the fast
+  // elements array needs to be initialized to contain proper holes, since
+  // boxing doubles may cause incremental marking.
+  ArrayStorageAllocationMode mode =
+      has_double && IsFastObjectElementsKind(elements_kind)
+      ? INITIALIZE_ARRAY_ELEMENTS_WITH_HOLE : DONT_INITIALIZE_ARRAY_ELEMENTS;
   JSArray* result_array;
+  // Allocate result.
   MaybeObject* maybe_array =
       heap->AllocateJSArrayAndStorage(elements_kind,
                                       result_len,
-                                      result_len);
+                                      result_len,
+                                      mode);
   if (!maybe_array->To(&result_array)) return maybe_array;
   if (result_len == 0) return result_array;
 
-  // Copy data.
-  int start_pos = 0;
-  FixedArray* result_elms(FixedArray::cast(result_array->elements()));
+  int j = 0;
+  FixedArrayBase* storage = result_array->elements();
   for (int i = 0; i < n_arguments; i++) {
     JSArray* array = JSArray::cast(args[i]);
     int len = Smi::cast(array->length())->value();
-    FixedArray* elms = FixedArray::cast(array->elements());
-    CopyObjectToObjectElements(elms, elements_kind, 0,
-                               result_elms, elements_kind,
-                               start_pos, len);
-    start_pos += len;
+    if (len > 0) {
+      ElementsAccessor* accessor = array->GetElementsAccessor();
+      MaybeObject* maybe_failure =
+          accessor->CopyElements(array, 0, storage, elements_kind, j, len);
+      if (maybe_failure->IsFailure()) return maybe_failure;
+      j += len;
+    }
   }
-  ASSERT(start_pos == result_len);
+
+  ASSERT(j == result_len);
 
   return result_array;
 }
@@ -1033,12 +1252,28 @@ BUILTIN(StrictModePoisonPill) {
 //
 
 
+// Searches the hidden prototype chain of the given object for the first
+// object that is an instance of the given type.  If no such object can
+// be found then Heap::null_value() is returned.
+static inline Object* FindHidden(Heap* heap,
+                                 Object* object,
+                                 FunctionTemplateInfo* type) {
+  if (object->IsInstanceOf(type)) return object;
+  Object* proto = object->GetPrototype();
+  if (proto->IsJSObject() &&
+      JSObject::cast(proto)->map()->is_hidden_prototype()) {
+    return FindHidden(heap, proto, type);
+  }
+  return heap->null_value();
+}
+
+
 // Returns the holder JSObject if the function can legally be called
 // with this receiver.  Returns Heap::null_value() if the call is
 // illegal.  Any arguments that don't fit the expected type is
-// overwritten with undefined.  Arguments that do fit the expected
-// type is overwritten with the object in the prototype chain that
-// actually has that type.
+// overwritten with undefined.  Note that holder and the arguments are
+// implicitly rewritten with the first object in the hidden prototype
+// chain that actually has the expected type.
 static inline Object* TypeCheck(Heap* heap,
                                 int argc,
                                 Object** argv,
@@ -1051,15 +1286,10 @@ static inline Object* TypeCheck(Heap* heap,
   SignatureInfo* sig = SignatureInfo::cast(sig_obj);
   // If necessary, check the receiver
   Object* recv_type = sig->receiver();
-
   Object* holder = recv;
   if (!recv_type->IsUndefined()) {
-    for (; holder != heap->null_value(); holder = holder->GetPrototype()) {
-      if (holder->IsInstanceOf(FunctionTemplateInfo::cast(recv_type))) {
-        break;
-      }
-    }
-    if (holder == heap->null_value()) return holder;
+    holder = FindHidden(heap, holder, FunctionTemplateInfo::cast(recv_type));
+    if (holder == heap->null_value()) return heap->null_value();
   }
   Object* args_obj = sig->args();
   // If there is no argument signature we're done
@@ -1072,13 +1302,9 @@ static inline Object* TypeCheck(Heap* heap,
     if (argtype->IsUndefined()) continue;
     Object** arg = &argv[-1 - i];
     Object* current = *arg;
-    for (; current != heap->null_value(); current = current->GetPrototype()) {
-      if (current->IsInstanceOf(FunctionTemplateInfo::cast(argtype))) {
-        *arg = current;
-        break;
-      }
-    }
-    if (current == heap->null_value()) *arg = heap->undefined_value();
+    current = FindHidden(heap, current, FunctionTemplateInfo::cast(argtype));
+    if (current == heap->null_value()) current = heap->undefined_value();
+    *arg = current;
   }
   return holder;
 }
@@ -1620,7 +1846,7 @@ void Builtins::SetUp(bool create_heap_objects) {
   // For now we generate builtin adaptor code into a stack-allocated
   // buffer, before copying it into individual code objects. Be careful
   // with alignment, some platforms don't like unaligned code.
-  union { int force_alignment; byte buffer[4*KB]; } u;
+  union { int force_alignment; byte buffer[8*KB]; } u;
 
   // Traverse the list of builtins and generate an adaptor in a
   // separate code object for each one.
diff --git a/deps/v8/src/builtins.h b/deps/v8/src/builtins.h
index ca70ae5403..a2f752e052 100644
--- a/deps/v8/src/builtins.h
+++ b/deps/v8/src/builtins.h
@@ -38,6 +38,25 @@ enum BuiltinExtraArguments {
 };
 
 
+#define CODE_AGE_LIST_WITH_ARG(V, A)     \
+  V(Quadragenarian, A)                   \
+  V(Quinquagenarian, A)                  \
+  V(Sexagenarian, A)                     \
+  V(Septuagenarian, A)                   \
+  V(Octogenarian, A)
+
+#define CODE_AGE_LIST_IGNORE_ARG(X, V) V(X)
+
+#define CODE_AGE_LIST(V) \
+  CODE_AGE_LIST_WITH_ARG(CODE_AGE_LIST_IGNORE_ARG, V)
+
+#define DECLARE_CODE_AGE_BUILTIN(C, V)             \
+  V(Make##C##CodeYoungAgainOddMarking, BUILTIN,    \
+    UNINITIALIZED, Code::kNoExtraICState)          \
+  V(Make##C##CodeYoungAgainEvenMarking, BUILTIN,   \
+    UNINITIALIZED, Code::kNoExtraICState)
+
+
 // Define list of builtins implemented in C++.
 #define BUILTIN_LIST_C(V)                                           \
   V(Illegal, NO_EXTRA_ARGUMENTS)                                    \
@@ -195,8 +214,8 @@ enum BuiltinExtraArguments {
                                     Code::kNoExtraICState)              \
                                                                         \
   V(OnStackReplacement,             BUILTIN, UNINITIALIZED,             \
-                                    Code::kNoExtraICState)
-
+                                    Code::kNoExtraICState)              \
+  CODE_AGE_LIST_WITH_ARG(DECLARE_CODE_AGE_BUILTIN, V)
 
 #ifdef ENABLE_DEBUGGER_SUPPORT
 // Define list of builtins used by the debugger implemented in assembly.
@@ -379,6 +398,14 @@ class Builtins {
   static void Generate_StringConstructCode(MacroAssembler* masm);
   static void Generate_OnStackReplacement(MacroAssembler* masm);
 
+#define DECLARE_CODE_AGE_BUILTIN_GENERATOR(C)                \
+  static void Generate_Make##C##CodeYoungAgainEvenMarking(   \
+      MacroAssembler* masm);                                 \
+  static void Generate_Make##C##CodeYoungAgainOddMarking(    \
+      MacroAssembler* masm);
+  CODE_AGE_LIST(DECLARE_CODE_AGE_BUILTIN_GENERATOR)
+#undef DECLARE_CODE_AGE_BUILTIN_GENERATOR
+
   static void InitBuiltinFunctionTable();
 
   bool initialized_;
diff --git a/deps/v8/src/code-stubs.cc b/deps/v8/src/code-stubs.cc
index 59a4cdf823..276c87ebd0 100644
--- a/deps/v8/src/code-stubs.cc
+++ b/deps/v8/src/code-stubs.cc
@@ -37,11 +37,11 @@
 namespace v8 {
 namespace internal {
 
-bool CodeStub::FindCodeInCache(Code** code_out) {
-  Heap* heap = Isolate::Current()->heap();
-  int index = heap->code_stubs()->FindEntry(GetKey());
+bool CodeStub::FindCodeInCache(Code** code_out, Isolate* isolate) {
+  UnseededNumberDictionary* stubs = isolate->heap()->code_stubs();
+  int index = stubs->FindEntry(GetKey());
   if (index != UnseededNumberDictionary::kNotFound) {
-    *code_out = Code::cast(heap->code_stubs()->ValueAt(index));
+    *code_out = Code::cast(stubs->ValueAt(index));
     return true;
   }
   return false;
@@ -93,8 +93,8 @@ Handle<Code> CodeStub::GetCode() {
   Heap* heap = isolate->heap();
   Code* code;
   if (UseSpecialCache()
-      ? FindCodeInSpecialCache(&code)
-      : FindCodeInCache(&code)) {
+      ? FindCodeInSpecialCache(&code, isolate)
+      : FindCodeInCache(&code, isolate)) {
     ASSERT(IsPregenerated() == code->is_pregenerated());
     return Handle<Code>(code);
   }
@@ -142,7 +142,9 @@ Handle<Code> CodeStub::GetCode() {
   }
 
   Activate(code);
-  ASSERT(!NeedsImmovableCode() || heap->lo_space()->Contains(code));
+  ASSERT(!NeedsImmovableCode() ||
+         heap->lo_space()->Contains(code) ||
+         heap->code_space()->FirstPage()->Contains(code->address()));
   return Handle<Code>(code, isolate);
 }
 
@@ -167,6 +169,122 @@ void CodeStub::PrintName(StringStream* stream) {
 }
 
 
+void BinaryOpStub::Generate(MacroAssembler* masm) {
+  // Explicitly allow generation of nested stubs. It is safe here because
+  // generation code does not use any raw pointers.
+  AllowStubCallsScope allow_stub_calls(masm, true);
+
+  BinaryOpIC::TypeInfo operands_type = Max(left_type_, right_type_);
+  if (left_type_ == BinaryOpIC::ODDBALL && right_type_ == BinaryOpIC::ODDBALL) {
+    // The OddballStub handles a number and an oddball, not two oddballs.
+    operands_type = BinaryOpIC::GENERIC;
+  }
+  switch (operands_type) {
+    case BinaryOpIC::UNINITIALIZED:
+      GenerateTypeTransition(masm);
+      break;
+    case BinaryOpIC::SMI:
+      GenerateSmiStub(masm);
+      break;
+    case BinaryOpIC::INT32:
+      GenerateInt32Stub(masm);
+      break;
+    case BinaryOpIC::HEAP_NUMBER:
+      GenerateHeapNumberStub(masm);
+      break;
+    case BinaryOpIC::ODDBALL:
+      GenerateOddballStub(masm);
+      break;
+    case BinaryOpIC::STRING:
+      GenerateStringStub(masm);
+      break;
+    case BinaryOpIC::GENERIC:
+      GenerateGeneric(masm);
+      break;
+    default:
+      UNREACHABLE();
+  }
+}
+
+
+#define __ ACCESS_MASM(masm)
+
+
+void BinaryOpStub::GenerateCallRuntime(MacroAssembler* masm) {
+  switch (op_) {
+    case Token::ADD:
+      __ InvokeBuiltin(Builtins::ADD, JUMP_FUNCTION);
+      break;
+    case Token::SUB:
+      __ InvokeBuiltin(Builtins::SUB, JUMP_FUNCTION);
+      break;
+    case Token::MUL:
+      __ InvokeBuiltin(Builtins::MUL, JUMP_FUNCTION);
+      break;
+    case Token::DIV:
+      __ InvokeBuiltin(Builtins::DIV, JUMP_FUNCTION);
+      break;
+    case Token::MOD:
+      __ InvokeBuiltin(Builtins::MOD, JUMP_FUNCTION);
+      break;
+    case Token::BIT_OR:
+      __ InvokeBuiltin(Builtins::BIT_OR, JUMP_FUNCTION);
+      break;
+    case Token::BIT_AND:
+      __ InvokeBuiltin(Builtins::BIT_AND, JUMP_FUNCTION);
+      break;
+    case Token::BIT_XOR:
+      __ InvokeBuiltin(Builtins::BIT_XOR, JUMP_FUNCTION);
+      break;
+    case Token::SAR:
+      __ InvokeBuiltin(Builtins::SAR, JUMP_FUNCTION);
+      break;
+    case Token::SHR:
+      __ InvokeBuiltin(Builtins::SHR, JUMP_FUNCTION);
+      break;
+    case Token::SHL:
+      __ InvokeBuiltin(Builtins::SHL, JUMP_FUNCTION);
+      break;
+    default:
+      UNREACHABLE();
+  }
+}
+
+
+#undef __
+
+
+void BinaryOpStub::PrintName(StringStream* stream) {
+  const char* op_name = Token::Name(op_);
+  const char* overwrite_name;
+  switch (mode_) {
+    case NO_OVERWRITE: overwrite_name = "Alloc"; break;
+    case OVERWRITE_RIGHT: overwrite_name = "OverwriteRight"; break;
+    case OVERWRITE_LEFT: overwrite_name = "OverwriteLeft"; break;
+    default: overwrite_name = "UnknownOverwrite"; break;
+  }
+  stream->Add("BinaryOpStub_%s_%s_%s+%s",
+              op_name,
+              overwrite_name,
+              BinaryOpIC::GetName(left_type_),
+              BinaryOpIC::GetName(right_type_));
+}
+
+
+void BinaryOpStub::GenerateStringStub(MacroAssembler* masm) {
+  ASSERT(left_type_ == BinaryOpIC::STRING || right_type_ == BinaryOpIC::STRING);
+  ASSERT(op_ == Token::ADD);
+  if (left_type_ == BinaryOpIC::STRING && right_type_ == BinaryOpIC::STRING) {
+    GenerateBothStringStub(masm);
+    return;
+  }
+  // Try to add arguments as strings, otherwise, transition to the generic
+  // BinaryOpIC type.
+  GenerateAddStrings(masm);
+  GenerateTypeTransition(masm);
+}
+
+
 void ICCompareStub::AddToSpecialCache(Handle<Code> new_object) {
   ASSERT(*known_map_ != NULL);
   Isolate* isolate = new_object->GetIsolate();
@@ -179,8 +297,7 @@ void ICCompareStub::AddToSpecialCache(Handle<Code> new_object) {
 }
 
 
-bool ICCompareStub::FindCodeInSpecialCache(Code** code_out) {
-  Isolate* isolate = known_map_->GetIsolate();
+bool ICCompareStub::FindCodeInSpecialCache(Code** code_out, Isolate* isolate) {
   Factory* factory = isolate->factory();
   Code::Flags flags = Code::ComputeFlags(
       static_cast<Code::Kind>(GetCodeKind()),
@@ -194,7 +311,12 @@ bool ICCompareStub::FindCodeInSpecialCache(Code** code_out) {
         flags));
   if (probe->IsCode()) {
     *code_out = Code::cast(*probe);
-    ASSERT(op_ == (*code_out)->compare_operation() + Token::EQ);
+#ifdef DEBUG
+    Token::Value cached_op;
+    ICCompareStub::DecodeMinorKey((*code_out)->stub_info(), NULL, NULL, NULL,
+                                  &cached_op);
+    ASSERT(op_ == cached_op);
+#endif
     return true;
   }
   return false;
@@ -202,7 +324,33 @@ bool ICCompareStub::FindCodeInSpecialCache(Code** code_out) {
 
 
 int ICCompareStub::MinorKey() {
-  return OpField::encode(op_ - Token::EQ) | StateField::encode(state_);
+  return OpField::encode(op_ - Token::EQ) |
+         LeftStateField::encode(left_) |
+         RightStateField::encode(right_) |
+         HandlerStateField::encode(state_);
+}
+
+
+void ICCompareStub::DecodeMinorKey(int minor_key,
+                                   CompareIC::State* left_state,
+                                   CompareIC::State* right_state,
+                                   CompareIC::State* handler_state,
+                                   Token::Value* op) {
+  if (left_state) {
+    *left_state =
+        static_cast<CompareIC::State>(LeftStateField::decode(minor_key));
+  }
+  if (right_state) {
+    *right_state =
+        static_cast<CompareIC::State>(RightStateField::decode(minor_key));
+  }
+  if (handler_state) {
+    *handler_state =
+        static_cast<CompareIC::State>(HandlerStateField::decode(minor_key));
+  }
+  if (op) {
+    *op = static_cast<Token::Value>(OpField::decode(minor_key) + Token::EQ);
+  }
 }
 
 
@@ -211,27 +359,28 @@ void ICCompareStub::Generate(MacroAssembler* masm) {
     case CompareIC::UNINITIALIZED:
       GenerateMiss(masm);
       break;
-    case CompareIC::SMIS:
+    case CompareIC::SMI:
       GenerateSmis(masm);
       break;
-    case CompareIC::HEAP_NUMBERS:
+    case CompareIC::HEAP_NUMBER:
       GenerateHeapNumbers(masm);
       break;
-    case CompareIC::STRINGS:
+    case CompareIC::STRING:
       GenerateStrings(masm);
       break;
-    case CompareIC::SYMBOLS:
+    case CompareIC::SYMBOL:
       GenerateSymbols(masm);
       break;
-    case CompareIC::OBJECTS:
+    case CompareIC::OBJECT:
       GenerateObjects(masm);
       break;
     case CompareIC::KNOWN_OBJECTS:
       ASSERT(*known_map_ != NULL);
       GenerateKnownObjects(masm);
       break;
-    default:
-      UNREACHABLE();
+    case CompareIC::GENERIC:
+      GenerateGeneric(masm);
+      break;
   }
 }
 
diff --git a/deps/v8/src/code-stubs.h b/deps/v8/src/code-stubs.h
index f19063230a..ae113f5729 100644
--- a/deps/v8/src/code-stubs.h
+++ b/deps/v8/src/code-stubs.h
@@ -141,7 +141,7 @@ class CodeStub BASE_EMBEDDED {
   bool CompilingCallsToThisStubIsGCSafe() {
     bool is_pregenerated = IsPregenerated();
     Code* code = NULL;
-    CHECK(!is_pregenerated || FindCodeInCache(&code));
+    CHECK(!is_pregenerated || FindCodeInCache(&code, Isolate::Current()));
     return is_pregenerated;
   }
 
@@ -160,7 +160,10 @@ class CodeStub BASE_EMBEDDED {
   virtual bool SometimesSetsUpAFrame() { return true; }
 
   // Lookup the code in the (possibly custom) cache.
-  bool FindCodeInCache(Code** code_out);
+  bool FindCodeInCache(Code** code_out, Isolate* isolate);
+
+ protected:
+  static bool CanUseFPRegisters();
 
  private:
   // Nonvirtual wrapper around the stub-specific Generate function.  Call
@@ -199,7 +202,9 @@ class CodeStub BASE_EMBEDDED {
   virtual void AddToSpecialCache(Handle<Code> new_object) { }
 
   // Find code in a specialized cache, work is delegated to the specific stub.
-  virtual bool FindCodeInSpecialCache(Code** code_out) { return false; }
+  virtual bool FindCodeInSpecialCache(Code** code_out, Isolate* isolate) {
+    return false;
+  }
 
   // If a stub uses a special cache override this.
   virtual bool UseSpecialCache() { return false; }
@@ -479,10 +484,132 @@ class MathPowStub: public CodeStub {
 };
 
 
+class BinaryOpStub: public CodeStub {
+ public:
+  BinaryOpStub(Token::Value op, OverwriteMode mode)
+      : op_(op),
+        mode_(mode),
+        platform_specific_bit_(false),
+        left_type_(BinaryOpIC::UNINITIALIZED),
+        right_type_(BinaryOpIC::UNINITIALIZED),
+        result_type_(BinaryOpIC::UNINITIALIZED) {
+    Initialize();
+    ASSERT(OpBits::is_valid(Token::NUM_TOKENS));
+  }
+
+  BinaryOpStub(
+      int key,
+      BinaryOpIC::TypeInfo left_type,
+      BinaryOpIC::TypeInfo right_type,
+      BinaryOpIC::TypeInfo result_type = BinaryOpIC::UNINITIALIZED)
+      : op_(OpBits::decode(key)),
+        mode_(ModeBits::decode(key)),
+        platform_specific_bit_(PlatformSpecificBits::decode(key)),
+        left_type_(left_type),
+        right_type_(right_type),
+        result_type_(result_type) { }
+
+  static void decode_types_from_minor_key(int minor_key,
+                                          BinaryOpIC::TypeInfo* left_type,
+                                          BinaryOpIC::TypeInfo* right_type,
+                                          BinaryOpIC::TypeInfo* result_type) {
+    *left_type =
+        static_cast<BinaryOpIC::TypeInfo>(LeftTypeBits::decode(minor_key));
+    *right_type =
+        static_cast<BinaryOpIC::TypeInfo>(RightTypeBits::decode(minor_key));
+    *result_type =
+        static_cast<BinaryOpIC::TypeInfo>(ResultTypeBits::decode(minor_key));
+  }
+
+  static Token::Value decode_op_from_minor_key(int minor_key) {
+    return static_cast<Token::Value>(OpBits::decode(minor_key));
+  }
+
+  enum SmiCodeGenerateHeapNumberResults {
+    ALLOW_HEAPNUMBER_RESULTS,
+    NO_HEAPNUMBER_RESULTS
+  };
+
+ private:
+  Token::Value op_;
+  OverwriteMode mode_;
+  bool platform_specific_bit_;  // Indicates SSE3 on IA32, VFP2 on ARM.
+
+  // Operand type information determined at runtime.
+  BinaryOpIC::TypeInfo left_type_;
+  BinaryOpIC::TypeInfo right_type_;
+  BinaryOpIC::TypeInfo result_type_;
+
+  virtual void PrintName(StringStream* stream);
+
+  // Minor key encoding in 19 bits TTTRRRLLLSOOOOOOOMM.
+  class ModeBits: public BitField<OverwriteMode, 0, 2> {};
+  class OpBits: public BitField<Token::Value, 2, 7> {};
+  class PlatformSpecificBits: public BitField<bool, 9, 1> {};
+  class LeftTypeBits: public BitField<BinaryOpIC::TypeInfo, 10, 3> {};
+  class RightTypeBits: public BitField<BinaryOpIC::TypeInfo, 13, 3> {};
+  class ResultTypeBits: public BitField<BinaryOpIC::TypeInfo, 16, 3> {};
+
+  Major MajorKey() { return BinaryOp; }
+  int MinorKey() {
+    return OpBits::encode(op_)
+           | ModeBits::encode(mode_)
+           | PlatformSpecificBits::encode(platform_specific_bit_)
+           | LeftTypeBits::encode(left_type_)
+           | RightTypeBits::encode(right_type_)
+           | ResultTypeBits::encode(result_type_);
+  }
+
+
+  // Platform-independent implementation.
+  void Generate(MacroAssembler* masm);
+  void GenerateCallRuntime(MacroAssembler* masm);
+
+  // Platform-independent signature, platform-specific implementation.
+  void Initialize();
+  void GenerateAddStrings(MacroAssembler* masm);
+  void GenerateBothStringStub(MacroAssembler* masm);
+  void GenerateGeneric(MacroAssembler* masm);
+  void GenerateGenericStub(MacroAssembler* masm);
+  void GenerateHeapNumberStub(MacroAssembler* masm);
+  void GenerateInt32Stub(MacroAssembler* masm);
+  void GenerateLoadArguments(MacroAssembler* masm);
+  void GenerateOddballStub(MacroAssembler* masm);
+  void GenerateRegisterArgsPush(MacroAssembler* masm);
+  void GenerateReturn(MacroAssembler* masm);
+  void GenerateSmiStub(MacroAssembler* masm);
+  void GenerateStringStub(MacroAssembler* masm);
+  void GenerateTypeTransition(MacroAssembler* masm);
+  void GenerateTypeTransitionWithSavedArgs(MacroAssembler* masm);
+  void GenerateUninitializedStub(MacroAssembler* masm);
+
+  // Entirely platform-specific methods are defined as static helper
+  // functions in the <arch>/code-stubs-<arch>.cc files.
+
+  virtual int GetCodeKind() { return Code::BINARY_OP_IC; }
+
+  virtual InlineCacheState GetICState() {
+    return BinaryOpIC::ToState(Max(left_type_, right_type_));
+  }
+
+  virtual void FinishCode(Handle<Code> code) {
+    code->set_stub_info(MinorKey());
+  }
+
+  friend class CodeGenerator;
+};
+
+
 class ICCompareStub: public CodeStub {
  public:
-  ICCompareStub(Token::Value op, CompareIC::State state)
-      : op_(op), state_(state) {
+  ICCompareStub(Token::Value op,
+                CompareIC::State left,
+                CompareIC::State right,
+                CompareIC::State handler)
+      : op_(op),
+        left_(left),
+        right_(right),
+        state_(handler) {
     ASSERT(Token::IsCompareOp(op));
   }
 
@@ -490,13 +617,24 @@ class ICCompareStub: public CodeStub {
 
   void set_known_map(Handle<Map> map) { known_map_ = map; }
 
+  static void DecodeMinorKey(int minor_key,
+                             CompareIC::State* left_state,
+                             CompareIC::State* right_state,
+                             CompareIC::State* handler_state,
+                             Token::Value* op);
+
+  static CompareIC::State CompareState(int minor_key) {
+    return static_cast<CompareIC::State>(HandlerStateField::decode(minor_key));
+  }
+
  private:
   class OpField: public BitField<int, 0, 3> { };
-  class StateField: public BitField<int, 3, 5> { };
+  class LeftStateField: public BitField<int, 3, 3> { };
+  class RightStateField: public BitField<int, 6, 3> { };
+  class HandlerStateField: public BitField<int, 9, 3> { };
 
   virtual void FinishCode(Handle<Code> code) {
-    code->set_compare_state(state_);
-    code->set_compare_operation(op_ - Token::EQ);
+    code->set_stub_info(MinorKey());
   }
 
   virtual CodeStub::Major MajorKey() { return CompareIC; }
@@ -511,117 +649,23 @@ class ICCompareStub: public CodeStub {
   void GenerateObjects(MacroAssembler* masm);
   void GenerateMiss(MacroAssembler* masm);
   void GenerateKnownObjects(MacroAssembler* masm);
+  void GenerateGeneric(MacroAssembler* masm);
 
   bool strict() const { return op_ == Token::EQ_STRICT; }
   Condition GetCondition() const { return CompareIC::ComputeCondition(op_); }
 
   virtual void AddToSpecialCache(Handle<Code> new_object);
-  virtual bool FindCodeInSpecialCache(Code** code_out);
+  virtual bool FindCodeInSpecialCache(Code** code_out, Isolate* isolate);
   virtual bool UseSpecialCache() { return state_ == CompareIC::KNOWN_OBJECTS; }
 
   Token::Value op_;
+  CompareIC::State left_;
+  CompareIC::State right_;
   CompareIC::State state_;
   Handle<Map> known_map_;
 };
 
 
-// Flags that control the compare stub code generation.
-enum CompareFlags {
-  NO_COMPARE_FLAGS = 0,
-  NO_SMI_COMPARE_IN_STUB = 1 << 0,
-  NO_NUMBER_COMPARE_IN_STUB = 1 << 1,
-  CANT_BOTH_BE_NAN = 1 << 2
-};
-
-
-enum NaNInformation {
-  kBothCouldBeNaN,
-  kCantBothBeNaN
-};
-
-
-class CompareStub: public CodeStub {
- public:
-  CompareStub(Condition cc,
-              bool strict,
-              CompareFlags flags,
-              Register lhs,
-              Register rhs) :
-     cc_(cc),
-      strict_(strict),
-      never_nan_nan_((flags & CANT_BOTH_BE_NAN) != 0),
-      include_number_compare_((flags & NO_NUMBER_COMPARE_IN_STUB) == 0),
-      include_smi_compare_((flags & NO_SMI_COMPARE_IN_STUB) == 0),
-      lhs_(lhs),
-      rhs_(rhs) { }
-
-  CompareStub(Condition cc,
-              bool strict,
-              CompareFlags flags) :
-      cc_(cc),
-      strict_(strict),
-      never_nan_nan_((flags & CANT_BOTH_BE_NAN) != 0),
-      include_number_compare_((flags & NO_NUMBER_COMPARE_IN_STUB) == 0),
-      include_smi_compare_((flags & NO_SMI_COMPARE_IN_STUB) == 0),
-      lhs_(no_reg),
-      rhs_(no_reg) { }
-
-  void Generate(MacroAssembler* masm);
-
- private:
-  Condition cc_;
-  bool strict_;
-  // Only used for 'equal' comparisons.  Tells the stub that we already know
-  // that at least one side of the comparison is not NaN.  This allows the
-  // stub to use object identity in the positive case.  We ignore it when
-  // generating the minor key for other comparisons to avoid creating more
-  // stubs.
-  bool never_nan_nan_;
-  // Do generate the number comparison code in the stub. Stubs without number
-  // comparison code is used when the number comparison has been inlined, and
-  // the stub will be called if one of the operands is not a number.
-  bool include_number_compare_;
-
-  // Generate the comparison code for two smi operands in the stub.
-  bool include_smi_compare_;
-
-  // Register holding the left hand side of the comparison if the stub gives
-  // a choice, no_reg otherwise.
-
-  Register lhs_;
-  // Register holding the right hand side of the comparison if the stub gives
-  // a choice, no_reg otherwise.
-  Register rhs_;
-
-  // Encoding of the minor key in 16 bits.
-  class StrictField: public BitField<bool, 0, 1> {};
-  class NeverNanNanField: public BitField<bool, 1, 1> {};
-  class IncludeNumberCompareField: public BitField<bool, 2, 1> {};
-  class IncludeSmiCompareField: public  BitField<bool, 3, 1> {};
-  class RegisterField: public BitField<bool, 4, 1> {};
-  class ConditionField: public BitField<int, 5, 11> {};
-
-  Major MajorKey() { return Compare; }
-
-  int MinorKey();
-
-  virtual int GetCodeKind() { return Code::COMPARE_IC; }
-  virtual void FinishCode(Handle<Code> code) {
-    code->set_compare_state(CompareIC::GENERIC);
-  }
-
-  // Branch to the label if the given object isn't a symbol.
-  void BranchIfNonSymbol(MacroAssembler* masm,
-                         Label* label,
-                         Register object,
-                         Register scratch);
-
-  // Unfortunately you have to run without snapshots to see most of these
-  // names in the profile since most compare stubs end up in the snapshot.
-  virtual void PrintName(StringStream* stream);
-};
-
-
 class CEntryStub : public CodeStub {
  public:
   explicit CEntryStub(int result_size,
@@ -998,13 +1042,15 @@ class KeyedStoreElementStub : public CodeStub {
                         KeyedAccessGrowMode grow_mode)
       : is_js_array_(is_js_array),
         elements_kind_(elements_kind),
-        grow_mode_(grow_mode) { }
+        grow_mode_(grow_mode),
+        fp_registers_(CanUseFPRegisters()) { }
 
   Major MajorKey() { return KeyedStoreElement; }
   int MinorKey() {
     return ElementsKindBits::encode(elements_kind_) |
         IsJSArrayBits::encode(is_js_array_) |
-        GrowModeBits::encode(grow_mode_);
+        GrowModeBits::encode(grow_mode_) |
+        FPRegisters::encode(fp_registers_);
   }
 
   void Generate(MacroAssembler* masm);
@@ -1013,10 +1059,12 @@ class KeyedStoreElementStub : public CodeStub {
   class ElementsKindBits: public BitField<ElementsKind,    0, 8> {};
   class GrowModeBits: public BitField<KeyedAccessGrowMode, 8, 1> {};
   class IsJSArrayBits: public BitField<bool,               9, 1> {};
+  class FPRegisters: public BitField<bool,                10, 1> {};
 
   bool is_js_array_;
   ElementsKind elements_kind_;
   KeyedAccessGrowMode grow_mode_;
+  bool fp_registers_;
 
   DISALLOW_COPY_AND_ASSIGN(KeyedStoreElementStub);
 };
@@ -1046,6 +1094,9 @@ class ToBooleanStub: public CodeStub {
 
     bool IsEmpty() const { return set_.IsEmpty(); }
     bool Contains(Type type) const { return set_.Contains(type); }
+    bool ContainsAnyOf(Types types) const {
+      return set_.ContainsAnyOf(types.set_);
+    }
     void Add(Type type) { set_.Add(type); }
     byte ToByte() const { return set_.ToIntegral(); }
     void Print(StringStream* stream) const;
@@ -1132,14 +1183,19 @@ class ElementsTransitionAndStoreStub : public CodeStub {
 
 class StoreArrayLiteralElementStub : public CodeStub {
  public:
-  explicit StoreArrayLiteralElementStub() {}
+  StoreArrayLiteralElementStub()
+        : fp_registers_(CanUseFPRegisters()) { }
 
  private:
+  class FPRegisters: public BitField<bool,                0, 1> {};
+
   Major MajorKey() { return StoreArrayLiteralElement; }
-  int MinorKey() { return 0; }
+  int MinorKey() { return FPRegisters::encode(fp_registers_); }
 
   void Generate(MacroAssembler* masm);
 
+  bool fp_registers_;
+
   DISALLOW_COPY_AND_ASSIGN(StoreArrayLiteralElementStub);
 };
 
@@ -1159,6 +1215,8 @@ class ProfileEntryHookStub : public CodeStub {
   // non-NULL hook.
   static bool SetFunctionEntryHook(FunctionEntryHook entry_hook);
 
+  static bool HasEntryHook() { return entry_hook_ != NULL; }
+
  private:
   static void EntryHookTrampoline(intptr_t function,
                                   intptr_t stack_pointer);
diff --git a/deps/v8/src/codegen.cc b/deps/v8/src/codegen.cc
index 0163580e90..83ac854a07 100644
--- a/deps/v8/src/codegen.cc
+++ b/deps/v8/src/codegen.cc
@@ -107,6 +107,7 @@ Handle<Code> CodeGenerator::MakeCodeEpilogue(MacroAssembler* masm,
   if (!code.is_null()) {
     isolate->counters()->total_compiled_code_size()->Increment(
         code->instruction_size());
+    code->set_prologue_offset(info->prologue_offset());
   }
   return code;
 }
diff --git a/deps/v8/src/codegen.h b/deps/v8/src/codegen.h
index 08a777f2ad..0ac68c2eac 100644
--- a/deps/v8/src/codegen.h
+++ b/deps/v8/src/codegen.h
@@ -90,6 +90,7 @@ namespace internal {
 typedef double (*UnaryMathFunction)(double x);
 
 UnaryMathFunction CreateTranscendentalFunction(TranscendentalCache::Type type);
+UnaryMathFunction CreateExpFunction();
 UnaryMathFunction CreateSqrtFunction();
 
 
@@ -103,6 +104,19 @@ class ElementsTransitionGenerator : public AllStatic {
   DISALLOW_COPY_AND_ASSIGN(ElementsTransitionGenerator);
 };
 
+
+class SeqStringSetCharGenerator : public AllStatic {
+ public:
+  static void Generate(MacroAssembler* masm,
+                       String::Encoding encoding,
+                       Register string,
+                       Register index,
+                       Register value);
+ private:
+  DISALLOW_COPY_AND_ASSIGN(SeqStringSetCharGenerator);
+};
+
+
 } }  // namespace v8::internal
 
 #endif  // V8_CODEGEN_H_
diff --git a/deps/v8/src/collection.js b/deps/v8/src/collection.js
index d36fe18fa0..b3c2db72d7 100644
--- a/deps/v8/src/collection.js
+++ b/deps/v8/src/collection.js
@@ -88,6 +88,25 @@ function SetDelete(key) {
 }
 
 
+function SetGetSize() {
+  if (!IS_SET(this)) {
+    throw MakeTypeError('incompatible_method_receiver',
+                        ['Set.prototype.size', this]);
+  }
+  return %SetGetSize(this);
+}
+
+
+function SetClear() {
+  if (!IS_SET(this)) {
+    throw MakeTypeError('incompatible_method_receiver',
+                        ['Set.prototype.clear', this]);
+  }
+  // Replace the internal table with a new empty table.
+  %SetInitialize(this);
+}
+
+
 function MapConstructor() {
   if (%_IsConstructCall()) {
     %MapInitialize(this);
@@ -145,6 +164,25 @@ function MapDelete(key) {
 }
 
 
+function MapGetSize() {
+  if (!IS_MAP(this)) {
+    throw MakeTypeError('incompatible_method_receiver',
+                        ['Map.prototype.size', this]);
+  }
+  return %MapGetSize(this);
+}
+
+
+function MapClear() {
+  if (!IS_MAP(this)) {
+    throw MakeTypeError('incompatible_method_receiver',
+                        ['Map.prototype.clear', this]);
+  }
+  // Replace the internal table with a new empty table.
+  %MapInitialize(this);
+}
+
+
 function WeakMapConstructor() {
   if (%_IsConstructCall()) {
     %WeakMapInitialize(this);
@@ -215,18 +253,22 @@ function WeakMapDelete(key) {
   %SetProperty($Map.prototype, "constructor", $Map, DONT_ENUM);
 
   // Set up the non-enumerable functions on the Set prototype object.
+  InstallGetter($Set.prototype, "size", SetGetSize);
   InstallFunctions($Set.prototype, DONT_ENUM, $Array(
     "add", SetAdd,
     "has", SetHas,
-    "delete", SetDelete
+    "delete", SetDelete,
+    "clear", SetClear
   ));
 
   // Set up the non-enumerable functions on the Map prototype object.
+  InstallGetter($Map.prototype, "size", MapGetSize);
   InstallFunctions($Map.prototype, DONT_ENUM, $Array(
     "get", MapGet,
     "set", MapSet,
     "has", MapHas,
-    "delete", MapDelete
+    "delete", MapDelete,
+    "clear", MapClear
   ));
 
   // Set up the WeakMap constructor function.
diff --git a/deps/v8/src/compilation-cache.cc b/deps/v8/src/compilation-cache.cc
index c0645760b3..904e84fd6c 100644
--- a/deps/v8/src/compilation-cache.cc
+++ b/deps/v8/src/compilation-cache.cc
@@ -98,7 +98,7 @@ void CompilationSubCache::Age() {
 
 
 void CompilationSubCache::IterateFunctions(ObjectVisitor* v) {
-  Object* undefined = isolate()->heap()->raw_unchecked_undefined_value();
+  Object* undefined = isolate()->heap()->undefined_value();
   for (int i = 0; i < generations_; i++) {
     if (tables_[i] != undefined) {
       reinterpret_cast<CompilationCacheTable*>(tables_[i])->IterateElements(v);
diff --git a/deps/v8/src/compiler.cc b/deps/v8/src/compiler.cc
index 86374371e9..5779aae81b 100644
--- a/deps/v8/src/compiler.cc
+++ b/deps/v8/src/compiler.cc
@@ -52,57 +52,53 @@ namespace internal {
 
 
 CompilationInfo::CompilationInfo(Handle<Script> script, Zone* zone)
-    : isolate_(script->GetIsolate()),
-      flags_(LanguageModeField::encode(CLASSIC_MODE)),
-      function_(NULL),
-      scope_(NULL),
-      global_scope_(NULL),
+    : flags_(LanguageModeField::encode(CLASSIC_MODE)),
       script_(script),
-      extension_(NULL),
-      pre_parse_data_(NULL),
-      osr_ast_id_(BailoutId::None()),
-      zone_(zone),
-      deferred_handles_(NULL) {
-  Initialize(BASE);
+      osr_ast_id_(BailoutId::None()) {
+  Initialize(zone);
 }
 
 
 CompilationInfo::CompilationInfo(Handle<SharedFunctionInfo> shared_info,
                                  Zone* zone)
-    : isolate_(shared_info->GetIsolate()),
-      flags_(LanguageModeField::encode(CLASSIC_MODE) |
-             IsLazy::encode(true)),
-      function_(NULL),
-      scope_(NULL),
-      global_scope_(NULL),
+    : flags_(LanguageModeField::encode(CLASSIC_MODE) | IsLazy::encode(true)),
       shared_info_(shared_info),
       script_(Handle<Script>(Script::cast(shared_info->script()))),
-      extension_(NULL),
-      pre_parse_data_(NULL),
-      osr_ast_id_(BailoutId::None()),
-      zone_(zone),
-      deferred_handles_(NULL) {
-  Initialize(BASE);
+      osr_ast_id_(BailoutId::None()) {
+  Initialize(zone);
 }
 
 
 CompilationInfo::CompilationInfo(Handle<JSFunction> closure, Zone* zone)
-    : isolate_(closure->GetIsolate()),
-      flags_(LanguageModeField::encode(CLASSIC_MODE) |
-             IsLazy::encode(true)),
-      function_(NULL),
-      scope_(NULL),
-      global_scope_(NULL),
+    : flags_(LanguageModeField::encode(CLASSIC_MODE) | IsLazy::encode(true)),
       closure_(closure),
       shared_info_(Handle<SharedFunctionInfo>(closure->shared())),
       script_(Handle<Script>(Script::cast(shared_info_->script()))),
-      extension_(NULL),
-      pre_parse_data_(NULL),
       context_(closure->context()),
-      osr_ast_id_(BailoutId::None()),
-      zone_(zone),
-      deferred_handles_(NULL) {
-  Initialize(BASE);
+      osr_ast_id_(BailoutId::None()) {
+  Initialize(zone);
+}
+
+
+void CompilationInfo::Initialize(Zone* zone) {
+  isolate_ = script_->GetIsolate();
+  function_ = NULL;
+  scope_ = NULL;
+  global_scope_ = NULL;
+  extension_ = NULL;
+  pre_parse_data_ = NULL;
+  zone_ = zone;
+  deferred_handles_ = NULL;
+  prologue_offset_ = kPrologueOffsetNotSet;
+  mode_ = V8::UseCrankshaft() ? BASE : NONOPT;
+  if (script_->type()->value() == Script::TYPE_NATIVE) {
+    MarkAsNative();
+  }
+  if (!shared_info_.is_null()) {
+    ASSERT(language_mode() == CLASSIC_MODE);
+    SetLanguageMode(shared_info_->language_mode());
+  }
+  set_bailout_reason("unknown");
 }
 
 
@@ -194,6 +190,11 @@ void OptimizingCompiler::RecordOptimizationStats() {
            code_size,
            compilation_time);
   }
+  if (FLAG_hydrogen_stats) {
+    HStatistics::Instance()->IncrementSubtotals(time_taken_to_create_graph_,
+                                                time_taken_to_optimize_,
+                                                time_taken_to_codegen_);
+  }
 }
 
 
@@ -284,7 +285,6 @@ OptimizingCompiler::Status OptimizingCompiler::CreateGraph() {
   // doesn't have deoptimization support. Alternatively, we may decide to
   // run the full code generator to get a baseline for the compile-time
   // performance of the hydrogen-based compiler.
-  Timer t(this, &time_taken_to_create_graph_);
   bool should_recompile = !info()->shared_info()->has_deoptimization_support();
   if (should_recompile || FLAG_hydrogen_stats) {
     HPhase phase(HPhase::kFullCodeGen);
@@ -324,7 +324,8 @@ OptimizingCompiler::Status OptimizingCompiler::CreateGraph() {
   oracle_ = new(info()->zone()) TypeFeedbackOracle(
       code, native_context, info()->isolate(), info()->zone());
   graph_builder_ = new(info()->zone()) HGraphBuilder(info(), oracle_);
-  HPhase phase(HPhase::kTotal);
+
+  Timer t(this, &time_taken_to_create_graph_);
   graph_ = graph_builder_->CreateGraph();
 
   if (info()->isolate()->has_pending_exception()) {
@@ -371,15 +372,17 @@ OptimizingCompiler::Status OptimizingCompiler::OptimizeGraph() {
 
 OptimizingCompiler::Status OptimizingCompiler::GenerateAndInstallCode() {
   ASSERT(last_status() == SUCCEEDED);
-  Timer timer(this, &time_taken_to_codegen_);
-  ASSERT(chunk_ != NULL);
-  ASSERT(graph_ != NULL);
-  Handle<Code> optimized_code = chunk_->Codegen();
-  if (optimized_code.is_null()) {
-    info()->set_bailout_reason("code generation failed");
-    return AbortOptimization();
+  {  // Scope for timer.
+    Timer timer(this, &time_taken_to_codegen_);
+    ASSERT(chunk_ != NULL);
+    ASSERT(graph_ != NULL);
+    Handle<Code> optimized_code = chunk_->Codegen();
+    if (optimized_code.is_null()) {
+      info()->set_bailout_reason("code generation failed");
+      return AbortOptimization();
+    }
+    info()->SetCode(optimized_code);
   }
-  info()->SetCode(optimized_code);
   RecordOptimizationStats();
   return SetLastStatus(SUCCEEDED);
 }
@@ -390,6 +393,8 @@ static bool GenerateCode(CompilationInfo* info) {
                        !info->IsCompilingForDebugging() &&
                        info->IsOptimizing();
   if (is_optimizing) {
+    Logger::TimerEventScope timer(
+        info->isolate(), Logger::TimerEventScope::v8_recompile_synchronous);
     return MakeCrankshaftCode(info);
   } else {
     if (info->IsOptimizing()) {
@@ -397,6 +402,8 @@ static bool GenerateCode(CompilationInfo* info) {
       // BASE or NONOPT.
       info->DisableOptimization();
     }
+    Logger::TimerEventScope timer(
+        info->isolate(), Logger::TimerEventScope::v8_compile_full_code);
     return FullCodeGenerator::MakeCode(info);
   }
 }
@@ -432,7 +439,9 @@ static Handle<SharedFunctionInfo> MakeFunctionInfo(CompilationInfo* info) {
 
   ASSERT(!isolate->native_context().is_null());
   Handle<Script> script = info->script();
-  script->set_context_data((*isolate->native_context())->data());
+  // TODO(svenpanne) Obscure place for this, perhaps move to OnBeforeCompile?
+  FixedArray* array = isolate->native_context()->embedder_data();
+  script->set_context_data(array->get(0));
 
 #ifdef ENABLE_DEBUGGER_SUPPORT
   if (info->is_eval()) {
@@ -841,6 +850,11 @@ void Compiler::RecompileParallel(Handle<JSFunction> closure) {
   ASSERT(closure->IsMarkedForParallelRecompilation());
 
   Isolate* isolate = closure->GetIsolate();
+  // Here we prepare compile data for the parallel recompilation thread, but
+  // this still happens synchronously and interrupts execution.
+  Logger::TimerEventScope timer(
+      isolate, Logger::TimerEventScope::v8_recompile_synchronous);
+
   if (!isolate->optimizing_compiler_thread()->IsQueueAvailable()) {
     if (FLAG_trace_parallel_recompilation) {
       PrintF("  ** Compilation queue, will retry opting on next run.\n");
@@ -849,7 +863,7 @@ void Compiler::RecompileParallel(Handle<JSFunction> closure) {
   }
 
   SmartPointer<CompilationInfo> info(new CompilationInfoWithZone(closure));
-  VMState state(isolate, PARALLEL_COMPILER_PROLOGUE);
+  VMState state(isolate, PARALLEL_COMPILER);
   PostponeInterruptsScope postpone(isolate);
 
   Handle<SharedFunctionInfo> shared = info->shared_info();
@@ -860,7 +874,10 @@ void Compiler::RecompileParallel(Handle<JSFunction> closure) {
   {
     CompilationHandleScope handle_scope(*info);
 
-    if (InstallCodeFromOptimizedCodeMap(*info)) return;
+    if (!FLAG_manual_parallel_recompilation &&
+        InstallCodeFromOptimizedCodeMap(*info)) {
+      return;
+    }
 
     if (ParserApi::Parse(*info, kNoParsingFlags)) {
       LanguageMode language_mode = info->function()->language_mode();
@@ -894,6 +911,10 @@ void Compiler::RecompileParallel(Handle<JSFunction> closure) {
 
 void Compiler::InstallOptimizedCode(OptimizingCompiler* optimizing_compiler) {
   SmartPointer<CompilationInfo> info(optimizing_compiler->info());
+  Isolate* isolate = info->isolate();
+  VMState state(isolate, PARALLEL_COMPILER);
+  Logger::TimerEventScope timer(
+      isolate, Logger::TimerEventScope::v8_recompile_synchronous);
   // If crankshaft succeeded, install the optimized code else install
   // the unoptimized code.
   OptimizingCompiler::Status status = optimizing_compiler->last_status();
diff --git a/deps/v8/src/compiler.h b/deps/v8/src/compiler.h
index af9459566d..653d5f124d 100644
--- a/deps/v8/src/compiler.h
+++ b/deps/v8/src/compiler.h
@@ -35,6 +35,8 @@
 namespace v8 {
 namespace internal {
 
+static const int kPrologueOffsetNotSet = -1;
+
 class ScriptDataImpl;
 
 // CompilationInfo encapsulates some information known at compile time.  It
@@ -186,6 +188,16 @@ class CompilationInfo {
   const char* bailout_reason() const { return bailout_reason_; }
   void set_bailout_reason(const char* reason) { bailout_reason_ = reason; }
 
+  int prologue_offset() const {
+    ASSERT_NE(kPrologueOffsetNotSet, prologue_offset_);
+    return prologue_offset_;
+  }
+
+  void set_prologue_offset(int prologue_offset) {
+    ASSERT_EQ(kPrologueOffsetNotSet, prologue_offset_);
+    prologue_offset_ = prologue_offset;
+  }
+
  private:
   Isolate* isolate_;
 
@@ -200,18 +212,7 @@ class CompilationInfo {
     NONOPT
   };
 
-  void Initialize(Mode mode) {
-    mode_ = V8::UseCrankshaft() ? mode : NONOPT;
-    ASSERT(!script_.is_null());
-    if (script_->type()->value() == Script::TYPE_NATIVE) {
-      MarkAsNative();
-    }
-    if (!shared_info_.is_null()) {
-      ASSERT(language_mode() == CLASSIC_MODE);
-      SetLanguageMode(shared_info_->language_mode());
-    }
-    set_bailout_reason("unknown");
-  }
+  void Initialize(Zone* zone);
 
   void SetMode(Mode mode) {
     ASSERT(V8::UseCrankshaft());
@@ -285,6 +286,8 @@ class CompilationInfo {
 
   const char* bailout_reason_;
 
+  int prologue_offset_;
+
   DISALLOW_COPY_AND_ASSIGN(CompilationInfo);
 };
 
@@ -293,6 +296,8 @@ class CompilationInfo {
 // Zone on construction and deallocates it on exit.
 class CompilationInfoWithZone: public CompilationInfo {
  public:
+  INLINE(void* operator new(size_t size)) { return Malloced::New(size); }
+
   explicit CompilationInfoWithZone(Handle<Script> script)
       : CompilationInfo(script, &zone_),
         zone_(script->GetIsolate()),
diff --git a/deps/v8/src/contexts.cc b/deps/v8/src/contexts.cc
index 169d9a1223..4cb52d3a6c 100644
--- a/deps/v8/src/contexts.cc
+++ b/deps/v8/src/contexts.cc
@@ -55,6 +55,15 @@ JSBuiltinsObject* Context::builtins() {
 }
 
 
+Context* Context::global_context() {
+  Context* current = this;
+  while (!current->IsGlobalContext()) {
+    current = current->previous();
+  }
+  return current;
+}
+
+
 Context* Context::native_context() {
   // Fast case: the global object for this context has been set.  In
   // that case, the global object has a direct pointer to the global
@@ -183,6 +192,10 @@ Handle<Object> Context::Lookup(Handle<String> name,
                 ? IMMUTABLE_CHECK_INITIALIZED_HARMONY :
                 IMMUTABLE_IS_INITIALIZED_HARMONY;
             break;
+          case MODULE:
+            *attributes = READ_ONLY;
+            *binding_flags = IMMUTABLE_IS_INITIALIZED_HARMONY;
+            break;
           case DYNAMIC:
           case DYNAMIC_GLOBAL:
           case DYNAMIC_LOCAL:
@@ -251,8 +264,6 @@ void Context::AddOptimizedFunction(JSFunction* function) {
     }
   }
 
-  CHECK(function->next_function_link()->IsUndefined());
-
   // Check that the context belongs to the weak native contexts list.
   bool found = false;
   Object* context = GetHeap()->native_contexts_list();
@@ -265,6 +276,16 @@ void Context::AddOptimizedFunction(JSFunction* function) {
   }
   CHECK(found);
 #endif
+
+  // If the function link field is already used then the function was
+  // enqueued as a code flushing candidate and we remove it now.
+  if (!function->next_function_link()->IsUndefined()) {
+    CodeFlusher* flusher = GetHeap()->mark_compact_collector()->code_flusher();
+    flusher->EvictCandidate(function);
+  }
+
+  ASSERT(function->next_function_link()->IsUndefined());
+
   function->set_next_function_link(get(OPTIMIZED_FUNCTIONS_LIST));
   set(OPTIMIZED_FUNCTIONS_LIST, function);
 }
@@ -305,6 +326,18 @@ void Context::ClearOptimizedFunctions() {
 }
 
 
+Handle<Object> Context::ErrorMessageForCodeGenerationFromStrings() {
+  Handle<Object> result(error_message_for_code_gen_from_strings());
+  if (result->IsUndefined()) {
+    const char* error =
+        "Code generation from strings disallowed for this context";
+    Isolate* isolate = Isolate::Current();
+    result = isolate->factory()->NewStringFromAscii(i::CStrVector(error));
+  }
+  return result;
+}
+
+
 #ifdef DEBUG
 bool Context::IsBootstrappingOrValidParentContext(
     Object* object, Context* child) {
diff --git a/deps/v8/src/contexts.h b/deps/v8/src/contexts.h
index cfc576cecb..745ba65347 100644
--- a/deps/v8/src/contexts.h
+++ b/deps/v8/src/contexts.h
@@ -152,14 +152,18 @@ enum BindingFlags {
   V(CONTEXT_EXTENSION_FUNCTION_INDEX, JSFunction, context_extension_function) \
   V(OUT_OF_MEMORY_INDEX, Object, out_of_memory) \
   V(MAP_CACHE_INDEX, Object, map_cache) \
-  V(CONTEXT_DATA_INDEX, Object, data) \
+  V(EMBEDDER_DATA_INDEX, FixedArray, embedder_data) \
   V(ALLOW_CODE_GEN_FROM_STRINGS_INDEX, Object, allow_code_gen_from_strings) \
+  V(ERROR_MESSAGE_FOR_CODE_GEN_FROM_STRINGS_INDEX, Object, \
+    error_message_for_code_gen_from_strings) \
   V(TO_COMPLETE_PROPERTY_DESCRIPTOR_INDEX, JSFunction, \
     to_complete_property_descriptor) \
   V(DERIVED_HAS_TRAP_INDEX, JSFunction, derived_has_trap) \
   V(DERIVED_GET_TRAP_INDEX, JSFunction, derived_get_trap) \
   V(DERIVED_SET_TRAP_INDEX, JSFunction, derived_set_trap) \
-  V(PROXY_ENUMERATE, JSFunction, proxy_enumerate) \
+  V(PROXY_ENUMERATE_INDEX, JSFunction, proxy_enumerate) \
+  V(OBSERVERS_NOTIFY_CHANGE_INDEX, JSFunction, observers_notify_change) \
+  V(OBSERVERS_DELIVER_CHANGES_INDEX, JSFunction, observers_deliver_changes) \
   V(RANDOM_SEED_INDEX, ByteArray, random_seed)
 
 // JSFunctions are pairs (context, function code), sometimes also called
@@ -279,13 +283,16 @@ class Context: public FixedArray {
     OPAQUE_REFERENCE_FUNCTION_INDEX,
     CONTEXT_EXTENSION_FUNCTION_INDEX,
     OUT_OF_MEMORY_INDEX,
-    CONTEXT_DATA_INDEX,
+    EMBEDDER_DATA_INDEX,
     ALLOW_CODE_GEN_FROM_STRINGS_INDEX,
+    ERROR_MESSAGE_FOR_CODE_GEN_FROM_STRINGS_INDEX,
     TO_COMPLETE_PROPERTY_DESCRIPTOR_INDEX,
     DERIVED_HAS_TRAP_INDEX,
     DERIVED_GET_TRAP_INDEX,
     DERIVED_SET_TRAP_INDEX,
-    PROXY_ENUMERATE,
+    PROXY_ENUMERATE_INDEX,
+    OBSERVERS_NOTIFY_CHANGE_INDEX,
+    OBSERVERS_DELIVER_CHANGES_INDEX,
     RANDOM_SEED_INDEX,
 
     // Properties from here are treated as weak references by the full GC.
@@ -338,12 +345,19 @@ class Context: public FixedArray {
   // The builtins object.
   JSBuiltinsObject* builtins();
 
+  // Get the innermost global context by traversing the context chain.
+  Context* global_context();
+
   // Compute the native context by traversing the context chain.
   Context* native_context();
 
-  // Predicates for context types.  IsNativeContext is defined on Object
+  // Predicates for context types.  IsNativeContext is also defined on Object
   // because we frequently have to know if arbitrary objects are natives
   // contexts.
+  bool IsNativeContext() {
+    Map* map = this->map();
+    return map == map->GetHeap()->native_context_map();
+  }
   bool IsFunctionContext() {
     Map* map = this->map();
     return map == map->GetHeap()->function_context_map();
@@ -381,6 +395,8 @@ class Context: public FixedArray {
   Object* OptimizedFunctionsListHead();
   void ClearOptimizedFunctions();
 
+  Handle<Object> ErrorMessageForCodeGenerationFromStrings();
+
 #define NATIVE_CONTEXT_FIELD_ACCESSORS(index, type, name) \
   void  set_##name(type* value) {                         \
     ASSERT(IsNativeContext());                            \
@@ -441,6 +457,9 @@ class Context: public FixedArray {
   static bool IsBootstrappingOrValidParentContext(Object* object, Context* kid);
   static bool IsBootstrappingOrGlobalObject(Object* object);
 #endif
+
+  STATIC_CHECK(kHeaderSize == Internals::kContextHeaderSize);
+  STATIC_CHECK(EMBEDDER_DATA_INDEX == Internals::kContextEmbedderDataIndex);
 };
 
 } }  // namespace v8::internal
diff --git a/deps/v8/src/counters.cc b/deps/v8/src/counters.cc
index 811c0aa2e6..6d453d6aa3 100644
--- a/deps/v8/src/counters.cc
+++ b/deps/v8/src/counters.cc
@@ -77,7 +77,7 @@ void* Histogram::CreateHistogram() const {
 
 // Start the timer.
 void HistogramTimer::Start() {
-  if (histogram_.Enabled()) {
+  if (histogram_.Enabled() || FLAG_log_internal_timer_events) {
     stop_time_ = 0;
     start_time_ = OS::Ticks();
   }
@@ -87,11 +87,14 @@ void HistogramTimer::Start() {
 void HistogramTimer::Stop() {
   if (histogram_.Enabled()) {
     stop_time_ = OS::Ticks();
-
     // Compute the delta between start and stop, in milliseconds.
     int milliseconds = static_cast<int>(stop_time_ - start_time_) / 1000;
     histogram_.AddSample(milliseconds);
   }
+  if (FLAG_log_internal_timer_events) {
+    LOG(Isolate::Current(),
+        TimerEvent(histogram_.name_, start_time_, OS::Ticks()));
+  }
 }
 
 } }  // namespace v8::internal
diff --git a/deps/v8/src/d8.cc b/deps/v8/src/d8.cc
index f20a41aa5f..8233f861ea 100644
--- a/deps/v8/src/d8.cc
+++ b/deps/v8/src/d8.cc
@@ -67,6 +67,62 @@
 
 namespace v8 {
 
+
+static Handle<Value> Throw(const char* message) {
+  return ThrowException(String::New(message));
+}
+
+
+// TODO(rossberg): should replace these by proper uses of HasInstance,
+// once we figure out a good way to make the templates global.
+const char kArrayBufferMarkerPropName[] = "d8::_is_array_buffer_";
+const char kArrayMarkerPropName[] = "d8::_is_typed_array_";
+
+
+#define FOR_EACH_SYMBOL(V) \
+  V(ArrayBuffer, "ArrayBuffer") \
+  V(ArrayBufferMarkerPropName, kArrayBufferMarkerPropName) \
+  V(ArrayMarkerPropName, kArrayMarkerPropName) \
+  V(buffer, "buffer") \
+  V(byteLength, "byteLength") \
+  V(byteOffset, "byteOffset") \
+  V(BYTES_PER_ELEMENT, "BYTES_PER_ELEMENT")  \
+  V(length, "length")
+
+
+class Symbols {
+ public:
+  explicit Symbols(Isolate* isolate) : isolate_(isolate) {
+    HandleScope scope;
+#define INIT_SYMBOL(name, value) \
+    name##_ = Persistent<String>::New(String::NewSymbol(value));
+    FOR_EACH_SYMBOL(INIT_SYMBOL)
+#undef INIT_SYMBOL
+    isolate->SetData(this);
+  }
+
+  ~Symbols() {
+#define DISPOSE_SYMBOL(name, value) name##_.Dispose();
+    FOR_EACH_SYMBOL(DISPOSE_SYMBOL)
+#undef DISPOSE_SYMBOL
+    isolate_->SetData(NULL);  // Not really needed, just to be sure...
+  }
+
+#define DEFINE_SYMBOL_GETTER(name, value) \
+  static Persistent<String> name(Isolate* isolate) { \
+    return reinterpret_cast<Symbols*>(isolate->GetData())->name##_; \
+  }
+  FOR_EACH_SYMBOL(DEFINE_SYMBOL_GETTER)
+#undef DEFINE_SYMBOL_GETTER
+
+ private:
+  Isolate* isolate_;
+#define DEFINE_MEMBER(name, value) Persistent<String> name##_;
+  FOR_EACH_SYMBOL(DEFINE_MEMBER)
+#undef DEFINE_MEMBER
+};
+
+
 LineEditor *LineEditor::first_ = NULL;
 
 
@@ -92,17 +148,17 @@ LineEditor* LineEditor::Get() {
 
 class DumbLineEditor: public LineEditor {
  public:
-  DumbLineEditor() : LineEditor(LineEditor::DUMB, "dumb") { }
+  explicit DumbLineEditor(Isolate* isolate)
+      : LineEditor(LineEditor::DUMB, "dumb"), isolate_(isolate) { }
   virtual Handle<String> Prompt(const char* prompt);
+ private:
+  Isolate* isolate_;
 };
 
 
-static DumbLineEditor dumb_line_editor;
-
-
 Handle<String> DumbLineEditor::Prompt(const char* prompt) {
   printf("%s", prompt);
-  return Shell::ReadFromStdin();
+  return Shell::ReadFromStdin(isolate_);
 }
 
 
@@ -115,7 +171,6 @@ i::Mutex* Shell::context_mutex_(i::OS::CreateMutex());
 Persistent<Context> Shell::utility_context_;
 #endif  // V8_SHARED
 
-LineEditor* Shell::console = NULL;
 Persistent<Context> Shell::evaluation_context_;
 ShellOptions Shell::options;
 const char* Shell::kPrompt = "d8> ";
@@ -200,7 +255,13 @@ Handle<Value> Shell::Write(const Arguments& args) {
     if (i != 0) {
       printf(" ");
     }
-    v8::String::Utf8Value str(args[i]);
+
+    // Explicitly catch potential exceptions in toString().
+    v8::TryCatch try_catch;
+    Handle<String> str_obj = args[i]->ToString();
+    if (try_catch.HasCaught()) return try_catch.ReThrow();
+
+    v8::String::Utf8Value str(str_obj);
     int n = static_cast<int>(fwrite(*str, sizeof(**str), str.length(), stdout));
     if (n != str.length()) {
       printf("Error in fwrite\n");
@@ -226,17 +287,17 @@ Handle<Value> Shell::DisableProfiler(const Arguments& args) {
 Handle<Value> Shell::Read(const Arguments& args) {
   String::Utf8Value file(args[0]);
   if (*file == NULL) {
-    return ThrowException(String::New("Error loading file"));
+    return Throw("Error loading file");
   }
-  Handle<String> source = ReadFile(*file);
+  Handle<String> source = ReadFile(args.GetIsolate(), *file);
   if (source.IsEmpty()) {
-    return ThrowException(String::New("Error loading file"));
+    return Throw("Error loading file");
   }
   return source;
 }
 
 
-Handle<String> Shell::ReadFromStdin() {
+Handle<String> Shell::ReadFromStdin(Isolate* isolate) {
   static const int kBufferSize = 256;
   char buffer[kBufferSize];
   Handle<String> accumulator = String::New("");
@@ -247,7 +308,7 @@ Handle<String> Shell::ReadFromStdin() {
     // If fgets gets an error, just give up.
     char* input = NULL;
     {  // Release lock for blocking input.
-      Unlocker unlock(Isolate::GetCurrent());
+      Unlocker unlock(isolate);
       input = fgets(buffer, kBufferSize, stdin);
     }
     if (input == NULL) return Handle<String>();
@@ -271,14 +332,14 @@ Handle<Value> Shell::Load(const Arguments& args) {
     HandleScope handle_scope;
     String::Utf8Value file(args[i]);
     if (*file == NULL) {
-      return ThrowException(String::New("Error loading file"));
+      return Throw("Error loading file");
     }
-    Handle<String> source = ReadFile(*file);
+    Handle<String> source = ReadFile(args.GetIsolate(), *file);
     if (source.IsEmpty()) {
-      return ThrowException(String::New("Error loading file"));
+      return Throw("Error loading file");
     }
     if (!ExecuteString(source, String::New(*file), false, true)) {
-      return ThrowException(String::New("Error executing file"));
+      return Throw("Error executing file");
     }
   }
   return Undefined();
@@ -308,7 +369,7 @@ static int32_t convertToUint(Local<Value> value_in, TryCatch* try_catch) {
   if (try_catch->HasCaught()) return 0;
 
   if (raw_value < 0) {
-    ThrowException(String::New("Array length must not be negative."));
+    Throw("Array length must not be negative.");
     return 0;
   }
 
@@ -317,33 +378,27 @@ static int32_t convertToUint(Local<Value> value_in, TryCatch* try_catch) {
   ASSERT(kMaxLength == i::ExternalArray::kMaxLength);
 #endif  // V8_SHARED
   if (raw_value > static_cast<int32_t>(kMaxLength)) {
-    ThrowException(
-        String::New("Array length exceeds maximum length."));
+    Throw("Array length exceeds maximum length.");
   }
   return raw_value;
 }
 
 
-// TODO(rossberg): should replace these by proper uses of HasInstance,
-// once we figure out a good way to make the templates global.
-const char kArrayBufferMarkerPropName[] = "d8::_is_array_buffer_";
-const char kArrayMarkerPropName[] = "d8::_is_typed_array_";
-
-
-Handle<Value> Shell::CreateExternalArrayBuffer(Handle<Object> buffer,
+Handle<Value> Shell::CreateExternalArrayBuffer(Isolate* isolate,
+                                               Handle<Object> buffer,
                                                int32_t length) {
   static const int32_t kMaxSize = 0x7fffffff;
   // Make sure the total size fits into a (signed) int.
   if (length < 0 || length > kMaxSize) {
-    return ThrowException(String::New("ArrayBuffer exceeds maximum size (2G)"));
+    return Throw("ArrayBuffer exceeds maximum size (2G)");
   }
   uint8_t* data = new uint8_t[length];
   if (data == NULL) {
-    return ThrowException(String::New("Memory allocation failed"));
+    return Throw("Memory allocation failed");
   }
   memset(data, 0, length);
 
-  buffer->SetHiddenValue(String::New(kArrayBufferMarkerPropName), True());
+  buffer->SetHiddenValue(Symbols::ArrayBufferMarkerPropName(isolate), True());
   Persistent<Object> persistent_array = Persistent<Object>::New(buffer);
   persistent_array.MakeWeak(data, ExternalArrayWeakCallback);
   persistent_array.MarkIndependent();
@@ -351,7 +406,7 @@ Handle<Value> Shell::CreateExternalArrayBuffer(Handle<Object> buffer,
 
   buffer->SetIndexedPropertiesToExternalArrayData(
       data, v8::kExternalByteArray, length);
-  buffer->Set(String::New("byteLength"), Int32::New(length), ReadOnly);
+  buffer->Set(Symbols::byteLength(isolate), Int32::New(length), ReadOnly);
 
   return buffer;
 }
@@ -367,18 +422,18 @@ Handle<Value> Shell::ArrayBuffer(const Arguments& args) {
   }
 
   if (args.Length() == 0) {
-    return ThrowException(
-        String::New("ArrayBuffer constructor must have one argument"));
+    return Throw("ArrayBuffer constructor must have one argument");
   }
   TryCatch try_catch;
   int32_t length = convertToUint(args[0], &try_catch);
   if (try_catch.HasCaught()) return try_catch.ReThrow();
 
-  return CreateExternalArrayBuffer(args.This(), length);
+  return CreateExternalArrayBuffer(args.GetIsolate(), args.This(), length);
 }
 
 
-Handle<Object> Shell::CreateExternalArray(Handle<Object> array,
+Handle<Object> Shell::CreateExternalArray(Isolate* isolate,
+                                          Handle<Object> array,
                                           Handle<Object> buffer,
                                           ExternalArrayType type,
                                           int32_t length,
@@ -394,12 +449,13 @@ Handle<Object> Shell::CreateExternalArray(Handle<Object> array,
 
   array->SetIndexedPropertiesToExternalArrayData(
       static_cast<uint8_t*>(data) + byteOffset, type, length);
-  array->SetHiddenValue(String::New(kArrayMarkerPropName), Int32::New(type));
-  array->Set(String::New("byteLength"), Int32::New(byteLength), ReadOnly);
-  array->Set(String::New("byteOffset"), Int32::New(byteOffset), ReadOnly);
-  array->Set(String::New("length"), Int32::New(length), ReadOnly);
-  array->Set(String::New("BYTES_PER_ELEMENT"), Int32::New(element_size));
-  array->Set(String::New("buffer"), buffer, ReadOnly);
+  array->SetHiddenValue(Symbols::ArrayMarkerPropName(isolate),
+                        Int32::New(type));
+  array->Set(Symbols::byteLength(isolate), Int32::New(byteLength), ReadOnly);
+  array->Set(Symbols::byteOffset(isolate), Int32::New(byteOffset), ReadOnly);
+  array->Set(Symbols::length(isolate), Int32::New(length), ReadOnly);
+  array->Set(Symbols::BYTES_PER_ELEMENT(isolate), Int32::New(element_size));
+  array->Set(Symbols::buffer(isolate), buffer, ReadOnly);
 
   return array;
 }
@@ -408,6 +464,7 @@ Handle<Object> Shell::CreateExternalArray(Handle<Object> array,
 Handle<Value> Shell::CreateExternalArray(const Arguments& args,
                                          ExternalArrayType type,
                                          int32_t element_size) {
+  Isolate* isolate = args.GetIsolate();
   if (!args.IsConstructCall()) {
     Handle<Value>* rec_args = new Handle<Value>[args.Length()];
     for (int i = 0; i < args.Length(); ++i) rec_args[i] = args[i];
@@ -433,16 +490,15 @@ Handle<Value> Shell::CreateExternalArray(const Arguments& args,
   int32_t byteOffset;
   bool init_from_array = false;
   if (args.Length() == 0) {
-    return ThrowException(
-        String::New("Array constructor must have at least one argument"));
+    return Throw("Array constructor must have at least one argument");
   }
   if (args[0]->IsObject() &&
       !args[0]->ToObject()->GetHiddenValue(
-          String::New(kArrayBufferMarkerPropName)).IsEmpty()) {
+          Symbols::ArrayBufferMarkerPropName(isolate)).IsEmpty()) {
     // Construct from ArrayBuffer.
     buffer = args[0]->ToObject();
     int32_t bufferLength =
-        convertToUint(buffer->Get(String::New("byteLength")), &try_catch);
+        convertToUint(buffer->Get(Symbols::byteLength(isolate)), &try_catch);
     if (try_catch.HasCaught()) return try_catch.ReThrow();
 
     if (args.Length() < 2 || args[1]->IsUndefined()) {
@@ -451,11 +507,10 @@ Handle<Value> Shell::CreateExternalArray(const Arguments& args,
       byteOffset = convertToUint(args[1], &try_catch);
       if (try_catch.HasCaught()) return try_catch.ReThrow();
       if (byteOffset > bufferLength) {
-        return ThrowException(String::New("byteOffset out of bounds"));
+        return Throw("byteOffset out of bounds");
       }
       if (byteOffset % element_size != 0) {
-        return ThrowException(
-            String::New("byteOffset must be multiple of element size"));
+        return Throw("byteOffset must be multiple of element size");
       }
     }
 
@@ -463,23 +518,22 @@ Handle<Value> Shell::CreateExternalArray(const Arguments& args,
       byteLength = bufferLength - byteOffset;
       length = byteLength / element_size;
       if (byteLength % element_size != 0) {
-        return ThrowException(
-            String::New("buffer size must be multiple of element size"));
+        return Throw("buffer size must be multiple of element size");
       }
     } else {
       length = convertToUint(args[2], &try_catch);
       if (try_catch.HasCaught()) return try_catch.ReThrow();
       byteLength = length * element_size;
       if (byteOffset + byteLength > bufferLength) {
-        return ThrowException(String::New("length out of bounds"));
+        return Throw("length out of bounds");
       }
     }
   } else {
     if (args[0]->IsObject() &&
-        args[0]->ToObject()->Has(String::New("length"))) {
+        args[0]->ToObject()->Has(Symbols::length(isolate))) {
       // Construct from array.
       length = convertToUint(
-          args[0]->ToObject()->Get(String::New("length")), &try_catch);
+          args[0]->ToObject()->Get(Symbols::length(isolate)), &try_catch);
       if (try_catch.HasCaught()) return try_catch.ReThrow();
       init_from_array = true;
     } else {
@@ -491,7 +545,7 @@ Handle<Value> Shell::CreateExternalArray(const Arguments& args,
     byteOffset = 0;
 
     Handle<Object> global = Context::GetCurrent()->Global();
-    Handle<Value> array_buffer = global->Get(String::New("ArrayBuffer"));
+    Handle<Value> array_buffer = global->Get(Symbols::ArrayBuffer(isolate));
     ASSERT(!try_catch.HasCaught() && array_buffer->IsFunction());
     Handle<Value> buffer_args[] = { Uint32::New(byteLength) };
     Handle<Value> result = Handle<Function>::Cast(array_buffer)->NewInstance(
@@ -500,8 +554,9 @@ Handle<Value> Shell::CreateExternalArray(const Arguments& args,
     buffer = result->ToObject();
   }
 
-  Handle<Object> array = CreateExternalArray(
-      args.This(), buffer, type, length, byteLength, byteOffset, element_size);
+  Handle<Object> array =
+      CreateExternalArray(isolate, args.This(), buffer, type, length,
+                          byteLength, byteOffset, element_size);
 
   if (init_from_array) {
     Handle<Object> init = args[0]->ToObject();
@@ -516,25 +571,23 @@ Handle<Value> Shell::ArrayBufferSlice(const Arguments& args) {
   TryCatch try_catch;
 
   if (!args.This()->IsObject()) {
-    return ThrowException(
-        String::New("'slice' invoked on non-object receiver"));
+    return Throw("'slice' invoked on non-object receiver");
   }
 
+  Isolate* isolate = args.GetIsolate();
   Local<Object> self = args.This();
   Local<Value> marker =
-      self->GetHiddenValue(String::New(kArrayBufferMarkerPropName));
+      self->GetHiddenValue(Symbols::ArrayBufferMarkerPropName(isolate));
   if (marker.IsEmpty()) {
-    return ThrowException(
-        String::New("'slice' invoked on wrong receiver type"));
+    return Throw("'slice' invoked on wrong receiver type");
   }
 
   int32_t length =
-      convertToUint(self->Get(String::New("byteLength")), &try_catch);
+      convertToUint(self->Get(Symbols::byteLength(isolate)), &try_catch);
   if (try_catch.HasCaught()) return try_catch.ReThrow();
 
   if (args.Length() == 0) {
-    return ThrowException(
-        String::New("'slice' must have at least one argument"));
+    return Throw("'slice' must have at least one argument");
   }
   int32_t begin = convertToInt(args[0], &try_catch);
   if (try_catch.HasCaught()) return try_catch.ReThrow();
@@ -573,32 +626,31 @@ Handle<Value> Shell::ArraySubArray(const Arguments& args) {
   TryCatch try_catch;
 
   if (!args.This()->IsObject()) {
-    return ThrowException(
-        String::New("'subarray' invoked on non-object receiver"));
+    return Throw("'subarray' invoked on non-object receiver");
   }
 
+  Isolate* isolate = args.GetIsolate();
   Local<Object> self = args.This();
-  Local<Value> marker = self->GetHiddenValue(String::New(kArrayMarkerPropName));
+  Local<Value> marker =
+      self->GetHiddenValue(Symbols::ArrayMarkerPropName(isolate));
   if (marker.IsEmpty()) {
-    return ThrowException(
-        String::New("'subarray' invoked on wrong receiver type"));
+    return Throw("'subarray' invoked on wrong receiver type");
   }
 
-  Handle<Object> buffer = self->Get(String::New("buffer"))->ToObject();
+  Handle<Object> buffer = self->Get(Symbols::buffer(isolate))->ToObject();
   if (try_catch.HasCaught()) return try_catch.ReThrow();
   int32_t length =
-      convertToUint(self->Get(String::New("length")), &try_catch);
+      convertToUint(self->Get(Symbols::length(isolate)), &try_catch);
   if (try_catch.HasCaught()) return try_catch.ReThrow();
   int32_t byteOffset =
-      convertToUint(self->Get(String::New("byteOffset")), &try_catch);
+      convertToUint(self->Get(Symbols::byteOffset(isolate)), &try_catch);
   if (try_catch.HasCaught()) return try_catch.ReThrow();
   int32_t element_size =
-      convertToUint(self->Get(String::New("BYTES_PER_ELEMENT")), &try_catch);
+      convertToUint(self->Get(Symbols::BYTES_PER_ELEMENT(isolate)), &try_catch);
   if (try_catch.HasCaught()) return try_catch.ReThrow();
 
   if (args.Length() == 0) {
-    return ThrowException(
-        String::New("'subarray' must have at least one argument"));
+    return Throw("'subarray' must have at least one argument");
   }
   int32_t begin = convertToInt(args[0], &try_catch);
   if (try_catch.HasCaught()) return try_catch.ReThrow();
@@ -633,35 +685,33 @@ Handle<Value> Shell::ArraySet(const Arguments& args) {
   TryCatch try_catch;
 
   if (!args.This()->IsObject()) {
-    return ThrowException(
-        String::New("'set' invoked on non-object receiver"));
+    return Throw("'set' invoked on non-object receiver");
   }
 
+  Isolate* isolate = args.GetIsolate();
   Local<Object> self = args.This();
-  Local<Value> marker = self->GetHiddenValue(String::New(kArrayMarkerPropName));
+  Local<Value> marker =
+      self->GetHiddenValue(Symbols::ArrayMarkerPropName(isolate));
   if (marker.IsEmpty()) {
-    return ThrowException(
-        String::New("'set' invoked on wrong receiver type"));
+    return Throw("'set' invoked on wrong receiver type");
   }
   int32_t length =
-      convertToUint(self->Get(String::New("length")), &try_catch);
+      convertToUint(self->Get(Symbols::length(isolate)), &try_catch);
   if (try_catch.HasCaught()) return try_catch.ReThrow();
   int32_t element_size =
-      convertToUint(self->Get(String::New("BYTES_PER_ELEMENT")), &try_catch);
+      convertToUint(self->Get(Symbols::BYTES_PER_ELEMENT(isolate)), &try_catch);
   if (try_catch.HasCaught()) return try_catch.ReThrow();
 
   if (args.Length() == 0) {
-    return ThrowException(
-        String::New("'set' must have at least one argument"));
+    return Throw("'set' must have at least one argument");
   }
   if (!args[0]->IsObject() ||
-      !args[0]->ToObject()->Has(String::New("length"))) {
-    return ThrowException(
-        String::New("'set' invoked with non-array argument"));
+      !args[0]->ToObject()->Has(Symbols::length(isolate))) {
+    return Throw("'set' invoked with non-array argument");
   }
   Handle<Object> source = args[0]->ToObject();
   int32_t source_length =
-      convertToUint(source->Get(String::New("length")), &try_catch);
+      convertToUint(source->Get(Symbols::length(isolate)), &try_catch);
   if (try_catch.HasCaught()) return try_catch.ReThrow();
 
   int32_t offset;
@@ -672,31 +722,32 @@ Handle<Value> Shell::ArraySet(const Arguments& args) {
     if (try_catch.HasCaught()) return try_catch.ReThrow();
   }
   if (offset + source_length > length) {
-    return ThrowException(String::New("offset or source length out of bounds"));
+    return Throw("offset or source length out of bounds");
   }
 
   int32_t source_element_size;
-  if (source->GetHiddenValue(String::New(kArrayMarkerPropName)).IsEmpty()) {
+  if (source->GetHiddenValue(Symbols::ArrayMarkerPropName(isolate)).IsEmpty()) {
     source_element_size = 0;
   } else {
     source_element_size =
-       convertToUint(source->Get(String::New("BYTES_PER_ELEMENT")), &try_catch);
+        convertToUint(source->Get(Symbols::BYTES_PER_ELEMENT(isolate)),
+                      &try_catch);
     if (try_catch.HasCaught()) return try_catch.ReThrow();
   }
 
   if (element_size == source_element_size &&
       self->GetConstructor()->StrictEquals(source->GetConstructor())) {
     // Use memmove on the array buffers.
-    Handle<Object> buffer = self->Get(String::New("buffer"))->ToObject();
+    Handle<Object> buffer = self->Get(Symbols::buffer(isolate))->ToObject();
     if (try_catch.HasCaught()) return try_catch.ReThrow();
     Handle<Object> source_buffer =
-        source->Get(String::New("buffer"))->ToObject();
+        source->Get(Symbols::buffer(isolate))->ToObject();
     if (try_catch.HasCaught()) return try_catch.ReThrow();
     int32_t byteOffset =
-        convertToUint(self->Get(String::New("byteOffset")), &try_catch);
+        convertToUint(self->Get(Symbols::byteOffset(isolate)), &try_catch);
     if (try_catch.HasCaught()) return try_catch.ReThrow();
     int32_t source_byteOffset =
-        convertToUint(source->Get(String::New("byteOffset")), &try_catch);
+        convertToUint(source->Get(Symbols::byteOffset(isolate)), &try_catch);
     if (try_catch.HasCaught()) return try_catch.ReThrow();
 
     uint8_t* dest = byteOffset + offset * element_size + static_cast<uint8_t*>(
@@ -712,10 +763,10 @@ Handle<Value> Shell::ArraySet(const Arguments& args) {
     }
   } else {
     // Need to copy element-wise to make the right conversions.
-    Handle<Object> buffer = self->Get(String::New("buffer"))->ToObject();
+    Handle<Object> buffer = self->Get(Symbols::buffer(isolate))->ToObject();
     if (try_catch.HasCaught()) return try_catch.ReThrow();
     Handle<Object> source_buffer =
-        source->Get(String::New("buffer"))->ToObject();
+        source->Get(Symbols::buffer(isolate))->ToObject();
     if (try_catch.HasCaught()) return try_catch.ReThrow();
 
     if (buffer->StrictEquals(source_buffer)) {
@@ -723,10 +774,10 @@ Handle<Value> Shell::ArraySet(const Arguments& args) {
       // This gets a bit tricky in the case of different element sizes
       // (which, of course, is extremely unlikely to ever occur in practice).
       int32_t byteOffset =
-          convertToUint(self->Get(String::New("byteOffset")), &try_catch);
+          convertToUint(self->Get(Symbols::byteOffset(isolate)), &try_catch);
       if (try_catch.HasCaught()) return try_catch.ReThrow();
       int32_t source_byteOffset =
-          convertToUint(source->Get(String::New("byteOffset")), &try_catch);
+          convertToUint(source->Get(Symbols::byteOffset(isolate)), &try_catch);
       if (try_catch.HasCaught()) return try_catch.ReThrow();
 
       // Copy as much as we can from left to right.
@@ -772,8 +823,9 @@ Handle<Value> Shell::ArraySet(const Arguments& args) {
 
 void Shell::ExternalArrayWeakCallback(Persistent<Value> object, void* data) {
   HandleScope scope;
+  Isolate* isolate = Isolate::GetCurrent();
   int32_t length =
-      object->ToObject()->Get(String::New("byteLength"))->Uint32Value();
+      object->ToObject()->Get(Symbols::byteLength(isolate))->Uint32Value();
   V8::AdjustAmountOfExternalAllocatedMemory(-length);
   delete[] static_cast<uint8_t*>(data);
   object.Dispose();
@@ -1139,7 +1191,7 @@ Handle<FunctionTemplate> Shell::CreateArrayTemplate(InvocationCallback fun) {
 }
 
 
-Handle<ObjectTemplate> Shell::CreateGlobalTemplate() {
+Handle<ObjectTemplate> Shell::CreateGlobalTemplate(Isolate* isolate) {
   Handle<ObjectTemplate> global_template = ObjectTemplate::New();
   global_template->Set(String::New("print"), FunctionTemplate::New(Print));
   global_template->Set(String::New("write"), FunctionTemplate::New(Write));
@@ -1159,7 +1211,7 @@ Handle<ObjectTemplate> Shell::CreateGlobalTemplate() {
   // Bind the handlers for external arrays.
   PropertyAttribute attr =
       static_cast<PropertyAttribute>(ReadOnly | DontDelete);
-  global_template->Set(String::New("ArrayBuffer"),
+  global_template->Set(Symbols::ArrayBuffer(isolate),
                        CreateArrayBufferTemplate(ArrayBuffer), attr);
   global_template->Set(String::New("Int8Array"),
                        CreateArrayTemplate(Int8Array), attr);
@@ -1196,7 +1248,7 @@ Handle<ObjectTemplate> Shell::CreateGlobalTemplate() {
 }
 
 
-void Shell::Initialize() {
+void Shell::Initialize(Isolate* isolate) {
 #ifdef COMPRESS_STARTUP_DATA_BZ2
   BZip2Decompressor startup_data_decompressor;
   int bz2_result = startup_data_decompressor.Decompress();
@@ -1217,12 +1269,15 @@ void Shell::Initialize() {
     V8::SetAddHistogramSampleFunction(AddHistogramSample);
   }
 #endif  // V8_SHARED
-  if (options.test_shell) return;
+}
+
 
+void Shell::InitializeDebugger(Isolate* isolate) {
+  if (options.test_shell) return;
 #ifndef V8_SHARED
   Locker lock;
   HandleScope scope;
-  Handle<ObjectTemplate> global_template = CreateGlobalTemplate();
+  Handle<ObjectTemplate> global_template = CreateGlobalTemplate(isolate);
   utility_context_ = Context::New(NULL, global_template);
 
 #ifdef ENABLE_DEBUGGER_SUPPORT
@@ -1236,13 +1291,13 @@ void Shell::Initialize() {
 }
 
 
-Persistent<Context> Shell::CreateEvaluationContext() {
+Persistent<Context> Shell::CreateEvaluationContext(Isolate* isolate) {
 #ifndef V8_SHARED
   // This needs to be a critical section since this is not thread-safe
   i::ScopedLock lock(context_mutex_);
 #endif  // V8_SHARED
   // Initialize the global objects
-  Handle<ObjectTemplate> global_template = CreateGlobalTemplate();
+  Handle<ObjectTemplate> global_template = CreateGlobalTemplate(isolate);
   Persistent<Context> context = Context::New(NULL, global_template);
   ASSERT(!context.IsEmpty());
   Context::Scope scope(context);
@@ -1288,7 +1343,6 @@ int CompareKeys(const void* a, const void* b) {
 
 
 void Shell::OnExit() {
-  if (console != NULL) console->Close();
   if (i::FLAG_dump_counters) {
     int number_of_counters = 0;
     for (CounterMap::Iterator i(counter_map_); i.More(); i.Next()) {
@@ -1348,9 +1402,9 @@ static FILE* FOpen(const char* path, const char* mode) {
 }
 
 
-static char* ReadChars(const char* name, int* size_out) {
+static char* ReadChars(Isolate* isolate, const char* name, int* size_out) {
   // Release the V8 lock while reading files.
-  v8::Unlocker unlocker(Isolate::GetCurrent());
+  v8::Unlocker unlocker(isolate);
   FILE* file = FOpen(name, "rb");
   if (file == NULL) return NULL;
 
@@ -1375,15 +1429,17 @@ Handle<Value> Shell::ReadBuffer(const Arguments& args) {
   String::Utf8Value filename(args[0]);
   int length;
   if (*filename == NULL) {
-    return ThrowException(String::New("Error loading file"));
+    return Throw("Error loading file");
   }
 
-  uint8_t* data = reinterpret_cast<uint8_t*>(ReadChars(*filename, &length));
+  uint8_t* data = reinterpret_cast<uint8_t*>(
+      ReadChars(args.GetIsolate(), *filename, &length));
   if (data == NULL) {
-    return ThrowException(String::New("Error reading file"));
+    return Throw("Error reading file");
   }
+  Isolate* isolate = args.GetIsolate();
   Handle<Object> buffer = Object::New();
-  buffer->SetHiddenValue(String::New(kArrayBufferMarkerPropName), True());
+  buffer->SetHiddenValue(Symbols::ArrayBufferMarkerPropName(isolate), True());
   Persistent<Object> persistent_buffer = Persistent<Object>::New(buffer);
   persistent_buffer.MakeWeak(data, ExternalArrayWeakCallback);
   persistent_buffer.MarkIndependent();
@@ -1391,7 +1447,7 @@ Handle<Value> Shell::ReadBuffer(const Arguments& args) {
 
   buffer->SetIndexedPropertiesToExternalArrayData(
       data, kExternalUnsignedByteArray, length);
-  buffer->Set(String::New("byteLength"),
+  buffer->Set(Symbols::byteLength(isolate),
       Int32::New(static_cast<int32_t>(length)), ReadOnly);
   return buffer;
 }
@@ -1421,9 +1477,9 @@ static char* ReadWord(char* data) {
 
 
 // Reads a file into a v8 string.
-Handle<String> Shell::ReadFile(const char* name) {
+Handle<String> Shell::ReadFile(Isolate* isolate, const char* name) {
   int size = 0;
-  char* chars = ReadChars(name, &size);
+  char* chars = ReadChars(isolate, name, &size);
   if (chars == NULL) return Handle<String>();
   Handle<String> result = String::New(chars);
   delete[] chars;
@@ -1431,12 +1487,13 @@ Handle<String> Shell::ReadFile(const char* name) {
 }
 
 
-void Shell::RunShell() {
+void Shell::RunShell(Isolate* isolate) {
   Locker locker;
   Context::Scope context_scope(evaluation_context_);
   HandleScope outer_scope;
   Handle<String> name = String::New("(d8)");
-  console = LineEditor::Get();
+  DumbLineEditor dumb_line_editor(isolate);
+  LineEditor* console = LineEditor::Get();
   printf("V8 version %s [console: %s]\n", V8::GetVersion(), console->name());
   console->Open();
   while (true) {
@@ -1446,6 +1503,7 @@ void Shell::RunShell() {
     ExecuteString(input, name, true, true);
   }
   printf("\n");
+  console->Close();
 }
 
 
@@ -1453,9 +1511,9 @@ void Shell::RunShell() {
 class ShellThread : public i::Thread {
  public:
   // Takes ownership of the underlying char array of |files|.
-  ShellThread(int no, char* files)
+  ShellThread(Isolate* isolate, char* files)
       : Thread("d8:ShellThread"),
-        no_(no), files_(files) { }
+        isolate_(isolate), files_(files) { }
 
   ~ShellThread() {
     delete[] files_;
@@ -1463,7 +1521,7 @@ class ShellThread : public i::Thread {
 
   virtual void Run();
  private:
-  int no_;
+  Isolate* isolate_;
   char* files_;
 };
 
@@ -1483,7 +1541,8 @@ void ShellThread::Run() {
     // Prepare the context for this thread.
     Locker locker;
     HandleScope outer_scope;
-    Persistent<Context> thread_context = Shell::CreateEvaluationContext();
+    Persistent<Context> thread_context =
+        Shell::CreateEvaluationContext(isolate_);
     Context::Scope context_scope(thread_context);
 
     while ((ptr != NULL) && (*ptr != '\0')) {
@@ -1496,7 +1555,7 @@ void ShellThread::Run() {
         continue;
       }
 
-      Handle<String> str = Shell::ReadFile(filename);
+      Handle<String> str = Shell::ReadFile(isolate_, filename);
       if (str.IsEmpty()) {
         printf("File '%s' not found\n", filename);
         Shell::Exit(1);
@@ -1524,7 +1583,7 @@ SourceGroup::~SourceGroup() {
 }
 
 
-void SourceGroup::Execute() {
+void SourceGroup::Execute(Isolate* isolate) {
   for (int i = begin_offset_; i < end_offset_; ++i) {
     const char* arg = argv_[i];
     if (strcmp(arg, "-e") == 0 && i + 1 < end_offset_) {
@@ -1542,7 +1601,7 @@ void SourceGroup::Execute() {
       // Use all other arguments as names of files to load and run.
       HandleScope handle_scope;
       Handle<String> file_name = String::New(arg);
-      Handle<String> source = ReadFile(arg);
+      Handle<String> source = ReadFile(isolate, arg);
       if (source.IsEmpty()) {
         printf("Error reading '%s'\n", arg);
         Shell::Exit(1);
@@ -1555,9 +1614,9 @@ void SourceGroup::Execute() {
 }
 
 
-Handle<String> SourceGroup::ReadFile(const char* name) {
+Handle<String> SourceGroup::ReadFile(Isolate* isolate, const char* name) {
   int size;
-  char* chars = ReadChars(name, &size);
+  char* chars = ReadChars(isolate, name, &size);
   if (chars == NULL) return Handle<String>();
   Handle<String> result = String::New(chars, size);
   delete[] chars;
@@ -1583,10 +1642,11 @@ void SourceGroup::ExecuteInThread() {
       Isolate::Scope iscope(isolate);
       Locker lock(isolate);
       HandleScope scope;
-      Persistent<Context> context = Shell::CreateEvaluationContext();
+      Symbols symbols(isolate);
+      Persistent<Context> context = Shell::CreateEvaluationContext(isolate);
       {
         Context::Scope cscope(context);
-        Execute();
+        Execute(isolate);
       }
       context.Dispose();
       if (Shell::options.send_idle_notification) {
@@ -1754,21 +1814,21 @@ bool Shell::SetOptions(int argc, char* argv[]) {
 }
 
 
-int Shell::RunMain(int argc, char* argv[]) {
+int Shell::RunMain(Isolate* isolate, int argc, char* argv[]) {
 #ifndef V8_SHARED
   i::List<i::Thread*> threads(1);
   if (options.parallel_files != NULL) {
     for (int i = 0; i < options.num_parallel_files; i++) {
       char* files = NULL;
-      { Locker lock(Isolate::GetCurrent());
+      { Locker lock(isolate);
         int size = 0;
-        files = ReadChars(options.parallel_files[i], &size);
+        files = ReadChars(isolate, options.parallel_files[i], &size);
       }
       if (files == NULL) {
         printf("File list '%s' not found\n", options.parallel_files[i]);
         Exit(1);
       }
-      ShellThread* thread = new ShellThread(threads.length(), files);
+      ShellThread* thread = new ShellThread(isolate, files);
       thread->Start();
       threads.Add(thread);
     }
@@ -1780,7 +1840,7 @@ int Shell::RunMain(int argc, char* argv[]) {
   {  // NOLINT
     Locker lock;
     HandleScope scope;
-    Persistent<Context> context = CreateEvaluationContext();
+    Persistent<Context> context = CreateEvaluationContext(isolate);
     if (options.last_run) {
       // Keep using the same context in the interactive shell.
       evaluation_context_ = context;
@@ -1794,7 +1854,7 @@ int Shell::RunMain(int argc, char* argv[]) {
     }
     {
       Context::Scope cscope(context);
-      options.isolate_sources[0].Execute();
+      options.isolate_sources[0].Execute(isolate);
     }
     if (!options.last_run) {
       context.Dispose();
@@ -1836,59 +1896,62 @@ int Shell::RunMain(int argc, char* argv[]) {
 
 int Shell::Main(int argc, char* argv[]) {
   if (!SetOptions(argc, argv)) return 1;
-  Initialize();
-
   int result = 0;
-  if (options.stress_opt || options.stress_deopt) {
-    Testing::SetStressRunType(
-        options.stress_opt ? Testing::kStressTypeOpt
-                           : Testing::kStressTypeDeopt);
-    int stress_runs = Testing::GetStressRuns();
-    for (int i = 0; i < stress_runs && result == 0; i++) {
-      printf("============ Stress %d/%d ============\n", i + 1, stress_runs);
-      Testing::PrepareStressRun(i);
-      options.last_run = (i == stress_runs - 1);
-      result = RunMain(argc, argv);
-    }
-    printf("======== Full Deoptimization =======\n");
-    Testing::DeoptimizeAll();
+  Isolate* isolate = Isolate::GetCurrent();
+  {
+    Initialize(isolate);
+    Symbols symbols(isolate);
+    InitializeDebugger(isolate);
+
+    if (options.stress_opt || options.stress_deopt) {
+      Testing::SetStressRunType(options.stress_opt
+                                ? Testing::kStressTypeOpt
+                                : Testing::kStressTypeDeopt);
+      int stress_runs = Testing::GetStressRuns();
+      for (int i = 0; i < stress_runs && result == 0; i++) {
+        printf("============ Stress %d/%d ============\n", i + 1, stress_runs);
+        Testing::PrepareStressRun(i);
+        options.last_run = (i == stress_runs - 1);
+        result = RunMain(isolate, argc, argv);
+      }
+      printf("======== Full Deoptimization =======\n");
+      Testing::DeoptimizeAll();
 #if !defined(V8_SHARED)
-  } else if (i::FLAG_stress_runs > 0) {
-    int stress_runs = i::FLAG_stress_runs;
-    for (int i = 0; i < stress_runs && result == 0; i++) {
-      printf("============ Run %d/%d ============\n", i + 1, stress_runs);
-      options.last_run = (i == stress_runs - 1);
-      result = RunMain(argc, argv);
-    }
+    } else if (i::FLAG_stress_runs > 0) {
+      int stress_runs = i::FLAG_stress_runs;
+      for (int i = 0; i < stress_runs && result == 0; i++) {
+        printf("============ Run %d/%d ============\n", i + 1, stress_runs);
+        options.last_run = (i == stress_runs - 1);
+        result = RunMain(isolate, argc, argv);
+      }
 #endif
-  } else {
-    result = RunMain(argc, argv);
-  }
+    } else {
+      result = RunMain(isolate, argc, argv);
+    }
 
 
 #if !defined(V8_SHARED) && defined(ENABLE_DEBUGGER_SUPPORT)
-  // Run remote debugger if requested, but never on --test
-  if (i::FLAG_remote_debugger && !options.test_shell) {
-    InstallUtilityScript();
-    RunRemoteDebugger(i::FLAG_debugger_port);
-    return 0;
-  }
+    // Run remote debugger if requested, but never on --test
+    if (i::FLAG_remote_debugger && !options.test_shell) {
+      InstallUtilityScript();
+      RunRemoteDebugger(i::FLAG_debugger_port);
+      return 0;
+    }
 #endif  // !V8_SHARED && ENABLE_DEBUGGER_SUPPORT
 
-  // Run interactive shell if explicitly requested or if no script has been
-  // executed, but never on --test
+    // Run interactive shell if explicitly requested or if no script has been
+    // executed, but never on --test
 
-  if (( options.interactive_shell
-      || !options.script_executed )
-      && !options.test_shell ) {
+    if (( options.interactive_shell || !options.script_executed )
+        && !options.test_shell ) {
 #if !defined(V8_SHARED) && defined(ENABLE_DEBUGGER_SUPPORT)
-    if (!i::FLAG_debugger) {
-      InstallUtilityScript();
-    }
+      if (!i::FLAG_debugger) {
+        InstallUtilityScript();
+      }
 #endif  // !V8_SHARED && ENABLE_DEBUGGER_SUPPORT
-    RunShell();
+      RunShell(isolate);
+    }
   }
-
   V8::Dispose();
 
 #ifndef V8_SHARED
diff --git a/deps/v8/src/d8.gyp b/deps/v8/src/d8.gyp
index 051b0922b7..a8361e6b4e 100644
--- a/deps/v8/src/d8.gyp
+++ b/deps/v8/src/d8.gyp
@@ -61,7 +61,8 @@
               'libraries': [ '-lreadline', ],
               'sources': [ 'd8-readline.cc' ],
             }],
-            [ 'OS!="win"', {
+            ['(OS=="linux" or OS=="mac" or OS=="freebsd" or OS=="netbsd" \
+               or OS=="openbsd" or OS=="solaris" or OS=="android")', {
               'sources': [ 'd8-posix.cc', ]
             }],
             [ 'OS=="win"', {
@@ -98,7 +99,7 @@
             '<(SHARED_INTERMEDIATE_DIR)/d8-js.cc',
           ],
           'action': [
-            '<(python)',
+            'python',
             '../tools/js2c.py',
             '<@(_outputs)',
             'D8',
diff --git a/deps/v8/src/d8.h b/deps/v8/src/d8.h
index a62a81fd9c..161c6533e7 100644
--- a/deps/v8/src/d8.h
+++ b/deps/v8/src/d8.h
@@ -158,7 +158,7 @@ class SourceGroup {
 
   void End(int offset) { end_offset_ = offset; }
 
-  void Execute();
+  void Execute(Isolate* isolate);
 
 #ifndef V8_SHARED
   void StartExecuteInThread();
@@ -187,7 +187,7 @@ class SourceGroup {
 #endif  // V8_SHARED
 
   void ExitShell(int exit_code);
-  Handle<String> ReadFile(const char* name);
+  Handle<String> ReadFile(Isolate* isolate, const char* name);
 
   const char** argv_;
   int begin_offset_;
@@ -272,9 +272,9 @@ class Shell : public i::AllStatic {
                             bool report_exceptions);
   static const char* ToCString(const v8::String::Utf8Value& value);
   static void ReportException(TryCatch* try_catch);
-  static Handle<String> ReadFile(const char* name);
-  static Persistent<Context> CreateEvaluationContext();
-  static int RunMain(int argc, char* argv[]);
+  static Handle<String> ReadFile(Isolate* isolate, const char* name);
+  static Persistent<Context> CreateEvaluationContext(Isolate* isolate);
+  static int RunMain(Isolate* isolate, int argc, char* argv[]);
   static int Main(int argc, char* argv[]);
   static void Exit(int exit_code);
 
@@ -310,9 +310,9 @@ class Shell : public i::AllStatic {
   static Handle<Value> DisableProfiler(const Arguments& args);
   static Handle<Value> Read(const Arguments& args);
   static Handle<Value> ReadBuffer(const Arguments& args);
-  static Handle<String> ReadFromStdin();
+  static Handle<String> ReadFromStdin(Isolate* isolate);
   static Handle<Value> ReadLine(const Arguments& args) {
-    return ReadFromStdin();
+    return ReadFromStdin(args.GetIsolate());
   }
   static Handle<Value> Load(const Arguments& args);
   static Handle<Value> ArrayBuffer(const Arguments& args);
@@ -365,7 +365,6 @@ class Shell : public i::AllStatic {
 
   static void AddOSMethods(Handle<ObjectTemplate> os_template);
 
-  static LineEditor* console;
   static const char* kPrompt;
   static ShellOptions options;
 
@@ -384,15 +383,18 @@ class Shell : public i::AllStatic {
   static Counter* GetCounter(const char* name, bool is_histogram);
   static void InstallUtilityScript();
 #endif  // V8_SHARED
-  static void Initialize();
-  static void RunShell();
+  static void Initialize(Isolate* isolate);
+  static void InitializeDebugger(Isolate* isolate);
+  static void RunShell(Isolate* isolate);
   static bool SetOptions(int argc, char* argv[]);
-  static Handle<ObjectTemplate> CreateGlobalTemplate();
+  static Handle<ObjectTemplate> CreateGlobalTemplate(Isolate* isolate);
   static Handle<FunctionTemplate> CreateArrayBufferTemplate(InvocationCallback);
   static Handle<FunctionTemplate> CreateArrayTemplate(InvocationCallback);
-  static Handle<Value> CreateExternalArrayBuffer(Handle<Object> buffer,
+  static Handle<Value> CreateExternalArrayBuffer(Isolate* isolate,
+                                                 Handle<Object> buffer,
                                                  int32_t size);
-  static Handle<Object> CreateExternalArray(Handle<Object> array,
+  static Handle<Object> CreateExternalArray(Isolate* isolate,
+                                            Handle<Object> array,
                                             Handle<Object> buffer,
                                             ExternalArrayType type,
                                             int32_t length,
diff --git a/deps/v8/src/date.js b/deps/v8/src/date.js
index a54cb238c5..c75d12c651 100644
--- a/deps/v8/src/date.js
+++ b/deps/v8/src/date.js
@@ -107,7 +107,7 @@ function MakeDay(year, month, date) {
   }
 
   // Now we rely on year and month being SMIs.
-  return %DateMakeDay(year, month) + date - 1;
+  return %DateMakeDay(year | 0, month | 0) + date - 1;
 }
 
 
diff --git a/deps/v8/src/dateparser-inl.h b/deps/v8/src/dateparser-inl.h
index a5c7143bdd..3cb36fa433 100644
--- a/deps/v8/src/dateparser-inl.h
+++ b/deps/v8/src/dateparser-inl.h
@@ -62,7 +62,8 @@ bool DateParser::Parse(Vector<Char> str,
   //         sss is in the range 000..999,
   //         hh is in the range 00..23,
   //         mm, ss, and sss default to 00 if missing, and
-  //         timezone defaults to Z if missing.
+  //         timezone defaults to Z if missing
+  //           (following Safari, ISO actually demands local time).
   //  Extensions:
   //   We also allow sss to have more or less than three digits (but at
   //   least one).
diff --git a/deps/v8/src/debug-debugger.js b/deps/v8/src/debug-debugger.js
index 163a0bd829..ea1a17d04b 100644
--- a/deps/v8/src/debug-debugger.js
+++ b/deps/v8/src/debug-debugger.js
@@ -1306,9 +1306,12 @@ ProtocolMessage.prototype.setOption = function(name, value) {
 };
 
 
-ProtocolMessage.prototype.failed = function(message) {
+ProtocolMessage.prototype.failed = function(message, opt_details) {
   this.success = false;
   this.message = message;
+  if (IS_OBJECT(opt_details)) {
+    this.error_details = opt_details;
+  }
 };
 
 
@@ -1355,6 +1358,9 @@ ProtocolMessage.prototype.toJSONProtocol = function() {
   if (this.message) {
     json.message = this.message;
   }
+  if (this.error_details) {
+    json.error_details = this.error_details;
+  }
   json.running = this.running;
   return JSON.stringify(json);
 };
@@ -1427,6 +1433,8 @@ DebugCommandProcessor.prototype.processDebugJSONRequest = function(
         this.scopesRequest_(request, response);
       } else if (request.command == 'scope') {
         this.scopeRequest_(request, response);
+      } else if (request.command == 'setVariableValue') {
+        this.setVariableValueRequest_(request, response);
       } else if (request.command == 'evaluate') {
         this.evaluateRequest_(request, response);
       } else if (lol_is_enabled && request.command == 'getobj') {
@@ -1953,11 +1961,12 @@ DebugCommandProcessor.prototype.frameRequest_ = function(request, response) {
 };
 
 
-DebugCommandProcessor.prototype.frameForScopeRequest_ = function(request) {
+DebugCommandProcessor.prototype.resolveFrameFromScopeDescription_ =
+    function(scope_description) {
   // Get the frame for which the scope or scopes are requested.
   // With no frameNumber argument use the currently selected frame.
-  if (request.arguments && !IS_UNDEFINED(request.arguments.frameNumber)) {
-    frame_index = request.arguments.frameNumber;
+  if (scope_description && !IS_UNDEFINED(scope_description.frameNumber)) {
+    frame_index = scope_description.frameNumber;
     if (frame_index < 0 || this.exec_state_.frameCount() <= frame_index) {
       throw new Error('Invalid frame number');
     }
@@ -1971,13 +1980,13 @@ DebugCommandProcessor.prototype.frameForScopeRequest_ = function(request) {
 // Gets scope host object from request. It is either a function
 // ('functionHandle' argument must be specified) or a stack frame
 // ('frameNumber' may be specified and the current frame is taken by default).
-DebugCommandProcessor.prototype.scopeHolderForScopeRequest_ =
-    function(request) {
-  if (request.arguments && "functionHandle" in request.arguments) {
-    if (!IS_NUMBER(request.arguments.functionHandle)) {
+DebugCommandProcessor.prototype.resolveScopeHolder_ =
+    function(scope_description) {
+  if (scope_description && "functionHandle" in scope_description) {
+    if (!IS_NUMBER(scope_description.functionHandle)) {
       throw new Error('Function handle must be a number');
     }
-    var function_mirror = LookupMirror(request.arguments.functionHandle);
+    var function_mirror = LookupMirror(scope_description.functionHandle);
     if (!function_mirror) {
       throw new Error('Failed to find function object by handle');
     }
@@ -1992,14 +2001,14 @@ DebugCommandProcessor.prototype.scopeHolderForScopeRequest_ =
     }
 
     // Get the frame for which the scopes are requested.
-    var frame = this.frameForScopeRequest_(request);
+    var frame = this.resolveFrameFromScopeDescription_(scope_description);
     return frame;
   }
 }
 
 
 DebugCommandProcessor.prototype.scopesRequest_ = function(request, response) {
-  var scope_holder = this.scopeHolderForScopeRequest_(request);
+  var scope_holder = this.resolveScopeHolder_(request.arguments);
 
   // Fill all scopes for this frame or function.
   var total_scopes = scope_holder.scopeCount();
@@ -2018,7 +2027,7 @@ DebugCommandProcessor.prototype.scopesRequest_ = function(request, response) {
 
 DebugCommandProcessor.prototype.scopeRequest_ = function(request, response) {
   // Get the frame or function for which the scope is requested.
-  var scope_holder = this.scopeHolderForScopeRequest_(request);
+  var scope_holder = this.resolveScopeHolder_(request.arguments);
 
   // With no scope argument just return top scope.
   var scope_index = 0;
@@ -2033,6 +2042,77 @@ DebugCommandProcessor.prototype.scopeRequest_ = function(request, response) {
 };
 
 
+// Reads value from protocol description. Description may be in form of type
+// (for singletons), raw value (primitive types supported in JSON),
+// string value description plus type (for primitive values) or handle id.
+// Returns raw value or throws exception.
+DebugCommandProcessor.resolveValue_ = function(value_description) {
+  if ("handle" in value_description) {
+    var value_mirror = LookupMirror(value_description.handle);
+    if (!value_mirror) {
+      throw new Error("Failed to resolve value by handle, ' #" +
+          mapping.handle + "# not found");
+    }
+    return value_mirror.value();
+  } else if ("stringDescription" in value_description) {
+    if (value_description.type == BOOLEAN_TYPE) {
+      return Boolean(value_description.stringDescription);
+    } else if (value_description.type == NUMBER_TYPE) {
+      return Number(value_description.stringDescription);
+    } if (value_description.type == STRING_TYPE) {
+      return String(value_description.stringDescription);
+    } else {
+      throw new Error("Unknown type");
+    }
+  } else if ("value" in value_description) {
+    return value_description.value;
+  } else if (value_description.type == UNDEFINED_TYPE) {
+    return void 0;
+  } else if (value_description.type == NULL_TYPE) {
+    return null;
+  } else {
+    throw new Error("Failed to parse value description");
+  }
+};
+
+
+DebugCommandProcessor.prototype.setVariableValueRequest_ =
+    function(request, response) {
+  if (!request.arguments) {
+    response.failed('Missing arguments');
+    return;
+  }
+
+  if (IS_UNDEFINED(request.arguments.name)) {
+    response.failed('Missing variable name');
+  }
+  var variable_name = request.arguments.name;
+
+  var scope_description = request.arguments.scope;
+
+  // Get the frame or function for which the scope is requested.
+  var scope_holder = this.resolveScopeHolder_(scope_description);
+
+  if (IS_UNDEFINED(scope_description.number)) {
+    response.failed('Missing scope number');
+  }
+  var scope_index = %ToNumber(scope_description.number);
+
+  var scope = scope_holder.scope(scope_index);
+
+  var new_value =
+      DebugCommandProcessor.resolveValue_(request.arguments.newValue);
+
+  scope.setVariableValue(variable_name, new_value);
+
+  var new_value_mirror = MakeMirror(new_value);
+
+  response.body = {
+    newValue: new_value_mirror
+  };
+};
+
+
 DebugCommandProcessor.prototype.evaluateRequest_ = function(request, response) {
   if (!request.arguments) {
     return response.failed('Missing arguments');
@@ -2387,8 +2467,17 @@ DebugCommandProcessor.prototype.changeLiveRequest_ = function(
 
   var new_source = request.arguments.new_source;
 
-  var result_description = Debug.LiveEdit.SetScriptSource(the_script,
-      new_source, preview_only, change_log);
+  var result_description;
+  try {
+    result_description = Debug.LiveEdit.SetScriptSource(the_script,
+        new_source, preview_only, change_log);
+  } catch (e) {
+    if (e instanceof Debug.LiveEdit.Failure && "details" in e) {
+      response.failed(e.message, e.details);
+      return;
+    }
+    throw e;
+  }
   response.body = {change_log: change_log, result: result_description};
 
   if (!preview_only && !this.running_ && result_description.stack_modified) {
@@ -2663,3 +2752,7 @@ function ValueToProtocolValue_(value, mirror_serializer) {
   }
   return json;
 }
+
+Debug.TestApi = {
+  CommandProcessorResolveValue: DebugCommandProcessor.resolveValue_
+};
diff --git a/deps/v8/src/debug.cc b/deps/v8/src/debug.cc
index 6358d35317..ea1c0842b9 100644
--- a/deps/v8/src/debug.cc
+++ b/deps/v8/src/debug.cc
@@ -261,8 +261,12 @@ void BreakLocationIterator::Reset() {
   // Create relocation iterators for the two code objects.
   if (reloc_iterator_ != NULL) delete reloc_iterator_;
   if (reloc_iterator_original_ != NULL) delete reloc_iterator_original_;
-  reloc_iterator_ = new RelocIterator(debug_info_->code());
-  reloc_iterator_original_ = new RelocIterator(debug_info_->original_code());
+  reloc_iterator_ = new RelocIterator(
+      debug_info_->code(),
+      ~RelocInfo::ModeMask(RelocInfo::CODE_AGE_SEQUENCE));
+  reloc_iterator_original_ = new RelocIterator(
+      debug_info_->original_code(),
+      ~RelocInfo::ModeMask(RelocInfo::CODE_AGE_SEQUENCE));
 
   // Position at the first break point.
   break_point_ = -1;
@@ -782,9 +786,11 @@ bool Debug::CompileDebuggerScript(int index) {
         "error_loading_debugger", &computed_location,
         Vector<Handle<Object> >::empty(), Handle<String>(), Handle<JSArray>());
     ASSERT(!isolate->has_pending_exception());
-    isolate->set_pending_exception(*exception);
-    MessageHandler::ReportMessage(Isolate::Current(), NULL, message);
-    isolate->clear_pending_exception();
+    if (!exception.is_null()) {
+      isolate->set_pending_exception(*exception);
+      MessageHandler::ReportMessage(Isolate::Current(), NULL, message);
+      isolate->clear_pending_exception();
+    }
     return false;
   }
 
@@ -2285,7 +2291,7 @@ void Debug::SetAfterBreakTarget(JavaScriptFrame* frame) {
   // Find the call address in the running code. This address holds the call to
   // either a DebugBreakXXX or to the debug break return entry code if the
   // break point is still active after processing the break point.
-  Address addr = frame->pc() - Assembler::kCallTargetAddressOffset;
+  Address addr = frame->pc() - Assembler::kPatchDebugBreakSlotReturnOffset;
 
   // Check if the location is at JS exit or debug break slot.
   bool at_js_return = false;
@@ -2374,7 +2380,7 @@ bool Debug::IsBreakAtReturn(JavaScriptFrame* frame) {
 #endif
 
   // Find the call address in the running code.
-  Address addr = frame->pc() - Assembler::kCallTargetAddressOffset;
+  Address addr = frame->pc() - Assembler::kPatchDebugBreakSlotReturnOffset;
 
   // Check if the location is at JS return.
   RelocIterator it(debug_info->code());
@@ -2826,6 +2832,7 @@ void Debugger::OnScriptCollected(int id) {
   HandleScope scope(isolate_);
 
   // No more to do if not debugging.
+  if (isolate_->debug()->InDebugger()) return;
   if (!IsDebuggerActive()) return;
   if (!Debugger::EventActive(v8::ScriptCollected)) return;
 
diff --git a/deps/v8/src/debug.h b/deps/v8/src/debug.h
index 9e33f4b184..150e29e308 100644
--- a/deps/v8/src/debug.h
+++ b/deps/v8/src/debug.h
@@ -793,7 +793,6 @@ class Debugger {
   };
   void OnAfterCompile(Handle<Script> script,
                       AfterCompileFlags after_compile_flags);
-  void OnNewFunction(Handle<JSFunction> fun);
   void OnScriptCollected(int id);
   void ProcessDebugEvent(v8::DebugEvent event,
                          Handle<JSObject> event_data,
diff --git a/deps/v8/src/deoptimizer.cc b/deps/v8/src/deoptimizer.cc
index d1b00f8bde..8f1711144e 100644
--- a/deps/v8/src/deoptimizer.cc
+++ b/deps/v8/src/deoptimizer.cc
@@ -27,6 +27,7 @@
 
 #include "v8.h"
 
+#include "accessors.h"
 #include "codegen.h"
 #include "deoptimizer.h"
 #include "disasm.h"
@@ -40,8 +41,11 @@ namespace v8 {
 namespace internal {
 
 DeoptimizerData::DeoptimizerData() {
-  eager_deoptimization_entry_code_ = NULL;
-  lazy_deoptimization_entry_code_ = NULL;
+  eager_deoptimization_entry_code_entries_ = -1;
+  lazy_deoptimization_entry_code_entries_ = -1;
+  size_t deopt_table_size = Deoptimizer::GetMaxDeoptTableSize();
+  eager_deoptimization_entry_code_ = new VirtualMemory(deopt_table_size);
+  lazy_deoptimization_entry_code_ = new VirtualMemory(deopt_table_size);
   current_ = NULL;
   deoptimizing_code_list_ = NULL;
 #ifdef ENABLE_DEBUGGER_SUPPORT
@@ -51,16 +55,18 @@ DeoptimizerData::DeoptimizerData() {
 
 
 DeoptimizerData::~DeoptimizerData() {
-  if (eager_deoptimization_entry_code_ != NULL) {
-    Isolate::Current()->memory_allocator()->Free(
-        eager_deoptimization_entry_code_);
-    eager_deoptimization_entry_code_ = NULL;
-  }
-  if (lazy_deoptimization_entry_code_ != NULL) {
-    Isolate::Current()->memory_allocator()->Free(
-        lazy_deoptimization_entry_code_);
-    lazy_deoptimization_entry_code_ = NULL;
+  delete eager_deoptimization_entry_code_;
+  eager_deoptimization_entry_code_ = NULL;
+  delete lazy_deoptimization_entry_code_;
+  lazy_deoptimization_entry_code_ = NULL;
+
+  DeoptimizingCodeListNode* current = deoptimizing_code_list_;
+  while (current != NULL) {
+    DeoptimizingCodeListNode* prev = current;
+    current = current->next();
+    delete prev;
   }
+  deoptimizing_code_list_ = NULL;
 }
 
 
@@ -95,6 +101,20 @@ Deoptimizer* Deoptimizer::New(JSFunction* function,
 }
 
 
+// No larger than 2K on all platforms
+static const int kDeoptTableMaxEpilogueCodeSize = 2 * KB;
+
+
+size_t Deoptimizer::GetMaxDeoptTableSize() {
+  int entries_size =
+      Deoptimizer::kMaxNumberOfEntries * Deoptimizer::table_entry_size_;
+  int commit_page_size = static_cast<int>(OS::CommitPageSize());
+  int page_count = ((kDeoptTableMaxEpilogueCodeSize + entries_size - 1) /
+                    commit_page_size) + 1;
+  return static_cast<size_t>(commit_page_size * page_count);
+}
+
+
 Deoptimizer* Deoptimizer::Grab(Isolate* isolate) {
   ASSERT(isolate == Isolate::Current());
   Deoptimizer* result = isolate->deoptimizer_data()->current_;
@@ -368,6 +388,8 @@ Deoptimizer::Deoptimizer(Isolate* isolate,
       output_count_(0),
       jsframe_count_(0),
       output_(NULL),
+      deferred_arguments_objects_values_(0),
+      deferred_arguments_objects_(0),
       deferred_heap_numbers_(0) {
   if (FLAG_trace_deopt && type != OSR) {
     if (type == DEBUGGER) {
@@ -451,44 +473,45 @@ void Deoptimizer::DeleteFrameDescriptions() {
 }
 
 
-Address Deoptimizer::GetDeoptimizationEntry(int id, BailoutType type) {
+Address Deoptimizer::GetDeoptimizationEntry(int id,
+                                            BailoutType type,
+                                            GetEntryMode mode) {
   ASSERT(id >= 0);
-  if (id >= kNumberOfEntries) return NULL;
-  MemoryChunk* base = NULL;
+  if (id >= kMaxNumberOfEntries) return NULL;
+  VirtualMemory* base = NULL;
+  if (mode == ENSURE_ENTRY_CODE) {
+    EnsureCodeForDeoptimizationEntry(type, id);
+  } else {
+    ASSERT(mode == CALCULATE_ENTRY_ADDRESS);
+  }
   DeoptimizerData* data = Isolate::Current()->deoptimizer_data();
   if (type == EAGER) {
-    if (data->eager_deoptimization_entry_code_ == NULL) {
-      data->eager_deoptimization_entry_code_ = CreateCode(type);
-    }
     base = data->eager_deoptimization_entry_code_;
   } else {
-    if (data->lazy_deoptimization_entry_code_ == NULL) {
-      data->lazy_deoptimization_entry_code_ = CreateCode(type);
-    }
     base = data->lazy_deoptimization_entry_code_;
   }
   return
-      static_cast<Address>(base->area_start()) + (id * table_entry_size_);
+      static_cast<Address>(base->address()) + (id * table_entry_size_);
 }
 
 
 int Deoptimizer::GetDeoptimizationId(Address addr, BailoutType type) {
-  MemoryChunk* base = NULL;
+  VirtualMemory* base = NULL;
   DeoptimizerData* data = Isolate::Current()->deoptimizer_data();
   if (type == EAGER) {
     base = data->eager_deoptimization_entry_code_;
   } else {
     base = data->lazy_deoptimization_entry_code_;
   }
+  Address base_casted = reinterpret_cast<Address>(base->address());
   if (base == NULL ||
-      addr < base->area_start() ||
-      addr >= base->area_start() +
-          (kNumberOfEntries * table_entry_size_)) {
+      addr < base->address() ||
+      addr >= base_casted + (kMaxNumberOfEntries * table_entry_size_)) {
     return kNotDeoptimizationEntry;
   }
   ASSERT_EQ(0,
-      static_cast<int>(addr - base->area_start()) % table_entry_size_);
-  return static_cast<int>(addr - base->area_start()) / table_entry_size_;
+            static_cast<int>(addr - base_casted) % table_entry_size_);
+  return static_cast<int>(addr - base_casted) / table_entry_size_;
 }
 
 
@@ -512,7 +535,7 @@ int Deoptimizer::GetOutputInfo(DeoptimizationOutputData* data,
   shared->SourceCodePrint(&stream, -1);
   PrintF("[source:\n%s\n]", *stream.ToCString());
 
-  UNREACHABLE();
+  FATAL("unable to find pc offset during deoptimization");
   return -1;
 }
 
@@ -633,8 +656,21 @@ void Deoptimizer::DoComputeOutputFrames() {
 }
 
 
-void Deoptimizer::MaterializeHeapNumbers() {
+void Deoptimizer::MaterializeHeapObjects(JavaScriptFrameIterator* it) {
   ASSERT_NE(DEBUGGER, bailout_type_);
+
+  // Handlify all argument object values before triggering any allocation.
+  List<Handle<Object> > values(deferred_arguments_objects_values_.length());
+  for (int i = 0; i < deferred_arguments_objects_values_.length(); ++i) {
+    values.Add(Handle<Object>(deferred_arguments_objects_values_[i]));
+  }
+
+  // Play it safe and clear all unhandlified values before we continue.
+  deferred_arguments_objects_values_.Clear();
+
+  // Materialize all heap numbers before looking at arguments because when the
+  // output frames are used to materialize arguments objects later on they need
+  // to already contain valid heap numbers.
   for (int i = 0; i < deferred_heap_numbers_.length(); i++) {
     HeapNumberMaterializationDescriptor d = deferred_heap_numbers_[i];
     Handle<Object> num = isolate_->factory()->NewNumber(d.value());
@@ -644,9 +680,55 @@ void Deoptimizer::MaterializeHeapNumbers() {
              d.value(),
              d.slot_address());
     }
-
     Memory::Object_at(d.slot_address()) = *num;
   }
+
+  // Materialize arguments objects one frame at a time.
+  for (int frame_index = 0; frame_index < jsframe_count(); ++frame_index) {
+    if (frame_index != 0) it->Advance();
+    JavaScriptFrame* frame = it->frame();
+    Handle<JSFunction> function(JSFunction::cast(frame->function()), isolate_);
+    Handle<JSObject> arguments;
+    for (int i = frame->ComputeExpressionsCount() - 1; i >= 0; --i) {
+      if (frame->GetExpression(i) == isolate_->heap()->arguments_marker()) {
+        ArgumentsObjectMaterializationDescriptor descriptor =
+            deferred_arguments_objects_.RemoveLast();
+        const int length = descriptor.arguments_length();
+        if (arguments.is_null()) {
+          if (frame->has_adapted_arguments()) {
+            // Use the arguments adapter frame we just built to materialize the
+            // arguments object. FunctionGetArguments can't throw an exception,
+            // so cast away the doubt with an assert.
+            arguments = Handle<JSObject>(JSObject::cast(
+                Accessors::FunctionGetArguments(*function,
+                                                NULL)->ToObjectUnchecked()));
+            values.RewindBy(length);
+          } else {
+            // Construct an arguments object and copy the parameters to a newly
+            // allocated arguments object backing store.
+            arguments =
+                isolate_->factory()->NewArgumentsObject(function, length);
+            Handle<FixedArray> array =
+                isolate_->factory()->NewFixedArray(length);
+            ASSERT(array->length() == length);
+            for (int i = length - 1; i >= 0 ; --i) {
+              array->set(i, *values.RemoveLast());
+            }
+            arguments->set_elements(*array);
+          }
+        }
+        frame->SetExpression(i, *arguments);
+        ASSERT_EQ(Memory::Object_at(descriptor.slot_address()), *arguments);
+        if (FLAG_trace_deopt) {
+          PrintF("Materializing %sarguments object for %p: ",
+                 frame->has_adapted_arguments() ? "(adapted) " : "",
+                 reinterpret_cast<void*>(descriptor.slot_address()));
+          arguments->ShortPrint();
+          PrintF("\n");
+        }
+      }
+    }
+  }
 }
 
 
@@ -932,8 +1014,8 @@ void Deoptimizer::DoTranslateCommand(TranslationIterator* iterator,
     }
 
     case Translation::ARGUMENTS_OBJECT: {
-      // Use the arguments marker value as a sentinel and fill in the arguments
-      // object after the deoptimized frame is built.
+      int args_index = iterator->Next() + 1;  // Skip receiver.
+      int args_length = iterator->Next() - 1;  // Skip receiver.
       if (FLAG_trace_deopt) {
         PrintF("    0x%08" V8PRIxPTR ": [top + %d] <- ",
                output_[frame_index]->GetTop() + output_offset,
@@ -941,9 +1023,20 @@ void Deoptimizer::DoTranslateCommand(TranslationIterator* iterator,
         isolate_->heap()->arguments_marker()->ShortPrint();
         PrintF(" ; arguments object\n");
       }
+      // Use the arguments marker value as a sentinel and fill in the arguments
+      // object after the deoptimized frame is built.
       intptr_t value = reinterpret_cast<intptr_t>(
           isolate_->heap()->arguments_marker());
+      AddArgumentsObject(
+          output_[frame_index]->GetTop() + output_offset, args_length);
       output_[frame_index]->SetFrameSlot(output_offset, value);
+      // We save the tagged argument values on the side and materialize the
+      // actual arguments object after the deoptimized frame is built.
+      for (int i = 0; i < args_length; i++) {
+        unsigned input_offset = input_->GetOffsetFromSlotIndex(args_index + i);
+        intptr_t input_value = input_->GetFrameSlot(input_offset);
+        AddArgumentsObjectValue(input_value);
+      }
       return;
     }
   }
@@ -1285,39 +1378,63 @@ Object* Deoptimizer::ComputeLiteral(int index) const {
 }
 
 
-void Deoptimizer::AddDoubleValue(intptr_t slot_address,
-                                 double value) {
+void Deoptimizer::AddArgumentsObject(intptr_t slot_address, int argc) {
+  ArgumentsObjectMaterializationDescriptor object_desc(
+      reinterpret_cast<Address>(slot_address), argc);
+  deferred_arguments_objects_.Add(object_desc);
+}
+
+
+void Deoptimizer::AddArgumentsObjectValue(intptr_t value) {
+  deferred_arguments_objects_values_.Add(reinterpret_cast<Object*>(value));
+}
+
+
+void Deoptimizer::AddDoubleValue(intptr_t slot_address, double value) {
   HeapNumberMaterializationDescriptor value_desc(
       reinterpret_cast<Address>(slot_address), value);
   deferred_heap_numbers_.Add(value_desc);
 }
 
 
-MemoryChunk* Deoptimizer::CreateCode(BailoutType type) {
+void Deoptimizer::EnsureCodeForDeoptimizationEntry(BailoutType type,
+                                                   int max_entry_id) {
   // We cannot run this if the serializer is enabled because this will
   // cause us to emit relocation information for the external
   // references. This is fine because the deoptimizer's code section
   // isn't meant to be serialized at all.
   ASSERT(!Serializer::enabled());
 
+  ASSERT(type == EAGER || type == LAZY);
+  DeoptimizerData* data = Isolate::Current()->deoptimizer_data();
+  int entry_count = (type == EAGER)
+      ? data->eager_deoptimization_entry_code_entries_
+      : data->lazy_deoptimization_entry_code_entries_;
+  if (max_entry_id < entry_count) return;
+  entry_count = Min(Max(entry_count * 2, Deoptimizer::kMinNumberOfEntries),
+                    Deoptimizer::kMaxNumberOfEntries);
+
   MacroAssembler masm(Isolate::Current(), NULL, 16 * KB);
   masm.set_emit_debug_code(false);
-  GenerateDeoptimizationEntries(&masm, kNumberOfEntries, type);
+  GenerateDeoptimizationEntries(&masm, entry_count, type);
   CodeDesc desc;
   masm.GetCode(&desc);
   ASSERT(desc.reloc_size == 0);
 
-  MemoryChunk* chunk =
-      Isolate::Current()->memory_allocator()->AllocateChunk(desc.instr_size,
-                                                            EXECUTABLE,
-                                                            NULL);
-  ASSERT(chunk->area_size() >= desc.instr_size);
-  if (chunk == NULL) {
-    V8::FatalProcessOutOfMemory("Not enough memory for deoptimization table");
+  VirtualMemory* memory = type == EAGER
+      ? data->eager_deoptimization_entry_code_
+      : data->lazy_deoptimization_entry_code_;
+  size_t table_size = Deoptimizer::GetMaxDeoptTableSize();
+  ASSERT(static_cast<int>(table_size) >= desc.instr_size);
+  memory->Commit(memory->address(), table_size, true);
+  memcpy(memory->address(), desc.buffer, desc.instr_size);
+  CPU::FlushICache(memory->address(), desc.instr_size);
+
+  if (type == EAGER) {
+    data->eager_deoptimization_entry_code_entries_ = entry_count;
+  } else {
+    data->lazy_deoptimization_entry_code_entries_ = entry_count;
   }
-  memcpy(chunk->area_start(), desc.buffer, desc.instr_size);
-  CPU::FlushICache(chunk->area_start(), desc.instr_size);
-  return chunk;
 }
 
 
@@ -1359,6 +1476,54 @@ void Deoptimizer::RemoveDeoptimizingCode(Code* code) {
 }
 
 
+static Object* CutOutRelatedFunctionsList(Context* context,
+                                          Code* code,
+                                          Object* undefined) {
+  Object* result_list_head = undefined;
+  Object* head;
+  Object* current;
+  current = head = context->get(Context::OPTIMIZED_FUNCTIONS_LIST);
+  JSFunction* prev = NULL;
+  while (current != undefined) {
+    JSFunction* func = JSFunction::cast(current);
+    current = func->next_function_link();
+    if (func->code() == code) {
+      func->set_next_function_link(result_list_head);
+      result_list_head = func;
+      if (prev) {
+        prev->set_next_function_link(current);
+      } else {
+        head = current;
+      }
+    } else {
+      prev = func;
+    }
+  }
+  if (head != context->get(Context::OPTIMIZED_FUNCTIONS_LIST)) {
+    context->set(Context::OPTIMIZED_FUNCTIONS_LIST, head);
+  }
+  return result_list_head;
+}
+
+
+void Deoptimizer::ReplaceCodeForRelatedFunctions(JSFunction* function,
+                                                 Code* code) {
+  Context* context = function->context()->native_context();
+
+  SharedFunctionInfo* shared = function->shared();
+
+  Object* undefined = Isolate::Current()->heap()->undefined_value();
+  Object* current = CutOutRelatedFunctionsList(context, code, undefined);
+
+  while (current != undefined) {
+    JSFunction* func = JSFunction::cast(current);
+    current = func->next_function_link();
+    func->set_code(shared->code());
+    func->set_next_function_link(undefined);
+  }
+}
+
+
 FrameDescription::FrameDescription(uint32_t frame_size,
                                    JSFunction* function)
     : frame_size_(frame_size),
@@ -1570,8 +1735,10 @@ void Translation::StoreLiteral(int literal_id) {
 }
 
 
-void Translation::StoreArgumentsObject() {
+void Translation::StoreArgumentsObject(int args_index, int args_length) {
   buffer_->Add(ARGUMENTS_OBJECT, zone());
+  buffer_->Add(args_index, zone());
+  buffer_->Add(args_length, zone());
 }
 
 
@@ -1582,7 +1749,6 @@ void Translation::MarkDuplicate() {
 
 int Translation::NumberOfOperandsFor(Opcode opcode) {
   switch (opcode) {
-    case ARGUMENTS_OBJECT:
     case DUPLICATE:
       return 0;
     case GETTER_STUB_FRAME:
@@ -1600,6 +1766,7 @@ int Translation::NumberOfOperandsFor(Opcode opcode) {
     case BEGIN:
     case ARGUMENTS_ADAPTOR_FRAME:
     case CONSTRUCT_STUB_FRAME:
+    case ARGUMENTS_OBJECT:
       return 2;
     case JS_FRAME:
       return 3;
diff --git a/deps/v8/src/deoptimizer.h b/deps/v8/src/deoptimizer.h
index cd33477e26..89955b38bd 100644
--- a/deps/v8/src/deoptimizer.h
+++ b/deps/v8/src/deoptimizer.h
@@ -57,6 +57,20 @@ class HeapNumberMaterializationDescriptor BASE_EMBEDDED {
 };
 
 
+class ArgumentsObjectMaterializationDescriptor BASE_EMBEDDED {
+ public:
+  ArgumentsObjectMaterializationDescriptor(Address slot_address, int argc)
+      : slot_address_(slot_address), arguments_length_(argc) { }
+
+  Address slot_address() const { return slot_address_; }
+  int arguments_length() const { return arguments_length_; }
+
+ private:
+  Address slot_address_;
+  int arguments_length_;
+};
+
+
 class OptimizedFunctionVisitor BASE_EMBEDDED {
  public:
   virtual ~OptimizedFunctionVisitor() {}
@@ -86,8 +100,10 @@ class DeoptimizerData {
 #endif
 
  private:
-  MemoryChunk* eager_deoptimization_entry_code_;
-  MemoryChunk* lazy_deoptimization_entry_code_;
+  int eager_deoptimization_entry_code_entries_;
+  int lazy_deoptimization_entry_code_entries_;
+  VirtualMemory* eager_deoptimization_entry_code_;
+  VirtualMemory* lazy_deoptimization_entry_code_;
   Deoptimizer* current_;
 
 #ifdef ENABLE_DEBUGGER_SUPPORT
@@ -152,6 +168,10 @@ class Deoptimizer : public Malloced {
   // execution returns.
   static void DeoptimizeFunction(JSFunction* function);
 
+  // Iterate over all the functions which share the same code object
+  // and make them use unoptimized version.
+  static void ReplaceCodeForRelatedFunctions(JSFunction* function, Code* code);
+
   // Deoptimize all functions in the heap.
   static void DeoptimizeAll();
 
@@ -196,7 +216,7 @@ class Deoptimizer : public Malloced {
 
   ~Deoptimizer();
 
-  void MaterializeHeapNumbers();
+  void MaterializeHeapObjects(JavaScriptFrameIterator* it);
 #ifdef ENABLE_DEBUGGER_SUPPORT
   void MaterializeHeapNumbersForDebuggerInspectableFrame(
       Address parameters_top,
@@ -208,7 +228,17 @@ class Deoptimizer : public Malloced {
 
   static void ComputeOutputFrames(Deoptimizer* deoptimizer);
 
-  static Address GetDeoptimizationEntry(int id, BailoutType type);
+
+  enum GetEntryMode {
+    CALCULATE_ENTRY_ADDRESS,
+    ENSURE_ENTRY_CODE
+  };
+
+
+  static Address GetDeoptimizationEntry(
+      int id,
+      BailoutType type,
+      GetEntryMode mode = ENSURE_ENTRY_CODE);
   static int GetDeoptimizationId(Address addr, BailoutType type);
   static int GetOutputInfo(DeoptimizationOutputData* data,
                            BailoutId node_id,
@@ -265,8 +295,11 @@ class Deoptimizer : public Malloced {
 
   int ConvertJSFrameIndexToFrameIndex(int jsframe_index);
 
+  static size_t GetMaxDeoptTableSize();
+
  private:
-  static const int kNumberOfEntries = 16384;
+  static const int kMinNumberOfEntries = 64;
+  static const int kMaxNumberOfEntries = 16384;
 
   Deoptimizer(Isolate* isolate,
               JSFunction* function,
@@ -305,9 +338,12 @@ class Deoptimizer : public Malloced {
 
   Object* ComputeLiteral(int index) const;
 
+  void AddArgumentsObject(intptr_t slot_address, int argc);
+  void AddArgumentsObjectValue(intptr_t value);
   void AddDoubleValue(intptr_t slot_address, double value);
 
-  static MemoryChunk* CreateCode(BailoutType type);
+  static void EnsureCodeForDeoptimizationEntry(BailoutType type,
+                                               int max_entry_id);
   static void GenerateDeoptimizationEntries(
       MacroAssembler* masm, int count, BailoutType type);
 
@@ -340,6 +376,8 @@ class Deoptimizer : public Malloced {
   // Array of output frame descriptions.
   FrameDescription** output_;
 
+  List<Object*> deferred_arguments_objects_values_;
+  List<ArgumentsObjectMaterializationDescriptor> deferred_arguments_objects_;
   List<HeapNumberMaterializationDescriptor> deferred_heap_numbers_;
 
   static const int table_entry_size_;
@@ -499,9 +537,6 @@ class FrameDescription {
   intptr_t context_;
   StackFrame::Type type_;
   Smi* state_;
-#ifdef DEBUG
-  Code::Kind kind_;
-#endif
 
   // Continuation is the PC where the execution continues after
   // deoptimizing.
@@ -608,7 +643,7 @@ class Translation BASE_EMBEDDED {
   void StoreUint32StackSlot(int index);
   void StoreDoubleStackSlot(int index);
   void StoreLiteral(int literal_id);
-  void StoreArgumentsObject();
+  void StoreArgumentsObject(int args_index, int args_length);
   void MarkDuplicate();
 
   Zone* zone() const { return zone_; }
diff --git a/deps/v8/src/elements-kind.cc b/deps/v8/src/elements-kind.cc
index 655a23bf1e..7b1651a953 100644
--- a/deps/v8/src/elements-kind.cc
+++ b/deps/v8/src/elements-kind.cc
@@ -35,9 +35,14 @@ namespace v8 {
 namespace internal {
 
 
-void PrintElementsKind(FILE* out, ElementsKind kind) {
+const char* ElementsKindToString(ElementsKind kind) {
   ElementsAccessor* accessor = ElementsAccessor::ForKind(kind);
-  PrintF(out, "%s", accessor->name());
+  return accessor->name();
+}
+
+
+void PrintElementsKind(FILE* out, ElementsKind kind) {
+  PrintF(out, "%s", ElementsKindToString(kind));
 }
 
 
diff --git a/deps/v8/src/elements-kind.h b/deps/v8/src/elements-kind.h
index 3be7711a35..cb3bb9c9e9 100644
--- a/deps/v8/src/elements-kind.h
+++ b/deps/v8/src/elements-kind.h
@@ -77,6 +77,7 @@ const int kElementsKindCount = LAST_ELEMENTS_KIND - FIRST_ELEMENTS_KIND + 1;
 const int kFastElementsKindCount = LAST_FAST_ELEMENTS_KIND -
     FIRST_FAST_ELEMENTS_KIND + 1;
 
+const char* ElementsKindToString(ElementsKind kind);
 void PrintElementsKind(FILE* out, ElementsKind kind);
 
 ElementsKind GetInitialFastElementsKind();
@@ -109,6 +110,13 @@ inline bool IsFastDoubleElementsKind(ElementsKind kind) {
 }
 
 
+inline bool IsDoubleOrFloatElementsKind(ElementsKind kind) {
+  return IsFastDoubleElementsKind(kind) ||
+      kind == EXTERNAL_DOUBLE_ELEMENTS ||
+      kind == EXTERNAL_FLOAT_ELEMENTS;
+}
+
+
 inline bool IsFastSmiOrObjectElementsKind(ElementsKind kind) {
   return kind == FAST_SMI_ELEMENTS ||
       kind == FAST_HOLEY_SMI_ELEMENTS ||
diff --git a/deps/v8/src/elements.cc b/deps/v8/src/elements.cc
index 4cb50a461d..8e1bf3ec89 100644
--- a/deps/v8/src/elements.cc
+++ b/deps/v8/src/elements.cc
@@ -146,33 +146,36 @@ static Failure* ThrowArrayLengthRangeError(Heap* heap) {
 }
 
 
-void CopyObjectToObjectElements(FixedArray* from,
-                                ElementsKind from_kind,
-                                uint32_t from_start,
-                                FixedArray* to,
-                                ElementsKind to_kind,
-                                uint32_t to_start,
-                                int raw_copy_size) {
-  ASSERT(to->map() != HEAP->fixed_cow_array_map());
+static void CopyObjectToObjectElements(FixedArrayBase* from_base,
+                                       ElementsKind from_kind,
+                                       uint32_t from_start,
+                                       FixedArrayBase* to_base,
+                                       ElementsKind to_kind,
+                                       uint32_t to_start,
+                                       int raw_copy_size) {
+  ASSERT(to_base->map() != HEAP->fixed_cow_array_map());
+  AssertNoAllocation no_allocation;
   int copy_size = raw_copy_size;
   if (raw_copy_size < 0) {
     ASSERT(raw_copy_size == ElementsAccessor::kCopyToEnd ||
            raw_copy_size == ElementsAccessor::kCopyToEndAndInitializeToHole);
-    copy_size = Min(from->length() - from_start,
-                    to->length() - to_start);
-#ifdef DEBUG
-    // FAST_*_ELEMENTS arrays cannot be uninitialized. Ensure they are already
-    // marked with the hole.
+    copy_size = Min(from_base->length() - from_start,
+                    to_base->length() - to_start);
     if (raw_copy_size == ElementsAccessor::kCopyToEndAndInitializeToHole) {
-      for (int i = to_start + copy_size; i < to->length(); ++i) {
-        ASSERT(to->get(i)->IsTheHole());
+      int start = to_start + copy_size;
+      int length = to_base->length() - start;
+      if (length > 0) {
+        Heap* heap = from_base->GetHeap();
+        MemsetPointer(FixedArray::cast(to_base)->data_start() + start,
+                      heap->the_hole_value(), length);
       }
     }
-#endif
   }
-  ASSERT((copy_size + static_cast<int>(to_start)) <= to->length() &&
-         (copy_size + static_cast<int>(from_start)) <= from->length());
+  ASSERT((copy_size + static_cast<int>(to_start)) <= to_base->length() &&
+         (copy_size + static_cast<int>(from_start)) <= from_base->length());
   if (copy_size == 0) return;
+  FixedArray* from = FixedArray::cast(from_base);
+  FixedArray* to = FixedArray::cast(to_base);
   ASSERT(IsFastSmiOrObjectElementsKind(from_kind));
   ASSERT(IsFastSmiOrObjectElementsKind(to_kind));
   Address to_address = to->address() + FixedArray::kHeaderSize;
@@ -193,31 +196,34 @@ void CopyObjectToObjectElements(FixedArray* from,
 }
 
 
-static void CopyDictionaryToObjectElements(SeededNumberDictionary* from,
+static void CopyDictionaryToObjectElements(FixedArrayBase* from_base,
                                            uint32_t from_start,
-                                           FixedArray* to,
+                                           FixedArrayBase* to_base,
                                            ElementsKind to_kind,
                                            uint32_t to_start,
                                            int raw_copy_size) {
+  SeededNumberDictionary* from = SeededNumberDictionary::cast(from_base);
+  AssertNoAllocation no_allocation;
   int copy_size = raw_copy_size;
   Heap* heap = from->GetHeap();
   if (raw_copy_size < 0) {
     ASSERT(raw_copy_size == ElementsAccessor::kCopyToEnd ||
            raw_copy_size == ElementsAccessor::kCopyToEndAndInitializeToHole);
     copy_size = from->max_number_key() + 1 - from_start;
-#ifdef DEBUG
-    // Fast object arrays cannot be uninitialized. Ensure they are already
-    // marked with the hole.
     if (raw_copy_size == ElementsAccessor::kCopyToEndAndInitializeToHole) {
-      for (int i = to_start + copy_size; i < to->length(); ++i) {
-        ASSERT(to->get(i)->IsTheHole());
+      int start = to_start + copy_size;
+      int length = to_base->length() - start;
+      if (length > 0) {
+        Heap* heap = from->GetHeap();
+        MemsetPointer(FixedArray::cast(to_base)->data_start() + start,
+                      heap->the_hole_value(), length);
       }
     }
-#endif
   }
-  ASSERT(to != from);
+  ASSERT(to_base != from_base);
   ASSERT(IsFastSmiOrObjectElementsKind(to_kind));
   if (copy_size == 0) return;
+  FixedArray* to = FixedArray::cast(to_base);
   uint32_t to_length = to->length();
   if (to_start + copy_size > to_length) {
     copy_size = to_length - to_start;
@@ -244,9 +250,9 @@ static void CopyDictionaryToObjectElements(SeededNumberDictionary* from,
 
 
 MUST_USE_RESULT static MaybeObject* CopyDoubleToObjectElements(
-    FixedDoubleArray* from,
+    FixedArrayBase* from_base,
     uint32_t from_start,
-    FixedArray* to,
+    FixedArrayBase* to_base,
     ElementsKind to_kind,
     uint32_t to_start,
     int raw_copy_size) {
@@ -255,21 +261,26 @@ MUST_USE_RESULT static MaybeObject* CopyDoubleToObjectElements(
   if (raw_copy_size < 0) {
     ASSERT(raw_copy_size == ElementsAccessor::kCopyToEnd ||
            raw_copy_size == ElementsAccessor::kCopyToEndAndInitializeToHole);
-    copy_size = Min(from->length() - from_start,
-                    to->length() - to_start);
-#ifdef DEBUG
-    // FAST_*_ELEMENTS arrays cannot be uninitialized. Ensure they are already
-    // marked with the hole.
+    copy_size = Min(from_base->length() - from_start,
+                    to_base->length() - to_start);
     if (raw_copy_size == ElementsAccessor::kCopyToEndAndInitializeToHole) {
-      for (int i = to_start + copy_size; i < to->length(); ++i) {
-        ASSERT(to->get(i)->IsTheHole());
+      // Also initialize the area that will be copied over since HeapNumber
+      // allocation below can cause an incremental marking step, requiring all
+      // existing heap objects to be propertly initialized.
+      int start = to_start;
+      int length = to_base->length() - start;
+      if (length > 0) {
+        Heap* heap = from_base->GetHeap();
+        MemsetPointer(FixedArray::cast(to_base)->data_start() + start,
+                      heap->the_hole_value(), length);
       }
     }
-#endif
   }
-  ASSERT((copy_size + static_cast<int>(to_start)) <= to->length() &&
-         (copy_size + static_cast<int>(from_start)) <= from->length());
-  if (copy_size == 0) return from;
+  ASSERT((copy_size + static_cast<int>(to_start)) <= to_base->length() &&
+         (copy_size + static_cast<int>(from_start)) <= from_base->length());
+  if (copy_size == 0) return from_base;
+  FixedDoubleArray* from = FixedDoubleArray::cast(from_base);
+  FixedArray* to = FixedArray::cast(to_base);
   for (int i = 0; i < copy_size; ++i) {
     if (IsFastSmiElementsKind(to_kind)) {
       UNIMPLEMENTED();
@@ -298,26 +309,28 @@ MUST_USE_RESULT static MaybeObject* CopyDoubleToObjectElements(
 }
 
 
-static void CopyDoubleToDoubleElements(FixedDoubleArray* from,
+static void CopyDoubleToDoubleElements(FixedArrayBase* from_base,
                                        uint32_t from_start,
-                                       FixedDoubleArray* to,
+                                       FixedArrayBase* to_base,
                                        uint32_t to_start,
                                        int raw_copy_size) {
   int copy_size = raw_copy_size;
   if (raw_copy_size < 0) {
     ASSERT(raw_copy_size == ElementsAccessor::kCopyToEnd ||
            raw_copy_size == ElementsAccessor::kCopyToEndAndInitializeToHole);
-    copy_size = Min(from->length() - from_start,
-                    to->length() - to_start);
+    copy_size = Min(from_base->length() - from_start,
+                    to_base->length() - to_start);
     if (raw_copy_size == ElementsAccessor::kCopyToEndAndInitializeToHole) {
-      for (int i = to_start + copy_size; i < to->length(); ++i) {
-        to->set_the_hole(i);
+      for (int i = to_start + copy_size; i < to_base->length(); ++i) {
+        FixedDoubleArray::cast(to_base)->set_the_hole(i);
       }
     }
   }
-  ASSERT((copy_size + static_cast<int>(to_start)) <= to->length() &&
-         (copy_size + static_cast<int>(from_start)) <= from->length());
+  ASSERT((copy_size + static_cast<int>(to_start)) <= to_base->length() &&
+         (copy_size + static_cast<int>(from_start)) <= from_base->length());
   if (copy_size == 0) return;
+  FixedDoubleArray* from = FixedDoubleArray::cast(from_base);
+  FixedDoubleArray* to = FixedDoubleArray::cast(to_base);
   Address to_address = to->address() + FixedDoubleArray::kHeaderSize;
   Address from_address = from->address() + FixedDoubleArray::kHeaderSize;
   to_address += kDoubleSize * to_start;
@@ -329,25 +342,27 @@ static void CopyDoubleToDoubleElements(FixedDoubleArray* from,
 }
 
 
-static void CopySmiToDoubleElements(FixedArray* from,
+static void CopySmiToDoubleElements(FixedArrayBase* from_base,
                                     uint32_t from_start,
-                                    FixedDoubleArray* to,
+                                    FixedArrayBase* to_base,
                                     uint32_t to_start,
                                     int raw_copy_size) {
   int copy_size = raw_copy_size;
   if (raw_copy_size < 0) {
     ASSERT(raw_copy_size == ElementsAccessor::kCopyToEnd ||
            raw_copy_size == ElementsAccessor::kCopyToEndAndInitializeToHole);
-    copy_size = from->length() - from_start;
+    copy_size = from_base->length() - from_start;
     if (raw_copy_size == ElementsAccessor::kCopyToEndAndInitializeToHole) {
-      for (int i = to_start + copy_size; i < to->length(); ++i) {
-        to->set_the_hole(i);
+      for (int i = to_start + copy_size; i < to_base->length(); ++i) {
+        FixedDoubleArray::cast(to_base)->set_the_hole(i);
       }
     }
   }
-  ASSERT((copy_size + static_cast<int>(to_start)) <= to->length() &&
-         (copy_size + static_cast<int>(from_start)) <= from->length());
+  ASSERT((copy_size + static_cast<int>(to_start)) <= to_base->length() &&
+         (copy_size + static_cast<int>(from_start)) <= from_base->length());
   if (copy_size == 0) return;
+  FixedArray* from = FixedArray::cast(from_base);
+  FixedDoubleArray* to = FixedDoubleArray::cast(to_base);
   Object* the_hole = from->GetHeap()->the_hole_value();
   for (uint32_t from_end = from_start + static_cast<uint32_t>(copy_size);
        from_start < from_end; from_start++, to_start++) {
@@ -361,9 +376,9 @@ static void CopySmiToDoubleElements(FixedArray* from,
 }
 
 
-static void CopyPackedSmiToDoubleElements(FixedArray* from,
+static void CopyPackedSmiToDoubleElements(FixedArrayBase* from_base,
                                           uint32_t from_start,
-                                          FixedDoubleArray* to,
+                                          FixedArrayBase* to_base,
                                           uint32_t to_start,
                                           int packed_size,
                                           int raw_copy_size) {
@@ -372,52 +387,55 @@ static void CopyPackedSmiToDoubleElements(FixedArray* from,
   if (raw_copy_size < 0) {
     ASSERT(raw_copy_size == ElementsAccessor::kCopyToEnd ||
            raw_copy_size == ElementsAccessor::kCopyToEndAndInitializeToHole);
-    copy_size = from->length() - from_start;
+    copy_size = packed_size - from_start;
     if (raw_copy_size == ElementsAccessor::kCopyToEndAndInitializeToHole) {
-      to_end = to->length();
+      to_end = to_base->length();
+      for (uint32_t i = to_start + copy_size; i < to_end; ++i) {
+        FixedDoubleArray::cast(to_base)->set_the_hole(i);
+      }
     } else {
       to_end = to_start + static_cast<uint32_t>(copy_size);
     }
   } else {
     to_end = to_start + static_cast<uint32_t>(copy_size);
   }
-  ASSERT(static_cast<int>(to_end) <= to->length());
+  ASSERT(static_cast<int>(to_end) <= to_base->length());
   ASSERT(packed_size >= 0 && packed_size <= copy_size);
-  ASSERT((copy_size + static_cast<int>(to_start)) <= to->length() &&
-         (copy_size + static_cast<int>(from_start)) <= from->length());
+  ASSERT((copy_size + static_cast<int>(to_start)) <= to_base->length() &&
+         (copy_size + static_cast<int>(from_start)) <= from_base->length());
   if (copy_size == 0) return;
+  FixedArray* from = FixedArray::cast(from_base);
+  FixedDoubleArray* to = FixedDoubleArray::cast(to_base);
   for (uint32_t from_end = from_start + static_cast<uint32_t>(packed_size);
        from_start < from_end; from_start++, to_start++) {
     Object* smi = from->get(from_start);
     ASSERT(!smi->IsTheHole());
     to->set(to_start, Smi::cast(smi)->value());
   }
-
-  while (to_start < to_end) {
-    to->set_the_hole(to_start++);
-  }
 }
 
 
-static void CopyObjectToDoubleElements(FixedArray* from,
+static void CopyObjectToDoubleElements(FixedArrayBase* from_base,
                                        uint32_t from_start,
-                                       FixedDoubleArray* to,
+                                       FixedArrayBase* to_base,
                                        uint32_t to_start,
                                        int raw_copy_size) {
   int copy_size = raw_copy_size;
   if (raw_copy_size < 0) {
     ASSERT(raw_copy_size == ElementsAccessor::kCopyToEnd ||
            raw_copy_size == ElementsAccessor::kCopyToEndAndInitializeToHole);
-    copy_size = from->length() - from_start;
+    copy_size = from_base->length() - from_start;
     if (raw_copy_size == ElementsAccessor::kCopyToEndAndInitializeToHole) {
-      for (int i = to_start + copy_size; i < to->length(); ++i) {
-        to->set_the_hole(i);
+      for (int i = to_start + copy_size; i < to_base->length(); ++i) {
+        FixedDoubleArray::cast(to_base)->set_the_hole(i);
       }
     }
   }
-  ASSERT((copy_size + static_cast<int>(to_start)) <= to->length() &&
-         (copy_size + static_cast<int>(from_start)) <= from->length());
+  ASSERT((copy_size + static_cast<int>(to_start)) <= to_base->length() &&
+         (copy_size + static_cast<int>(from_start)) <= from_base->length());
   if (copy_size == 0) return;
+  FixedArray* from = FixedArray::cast(from_base);
+  FixedDoubleArray* to = FixedDoubleArray::cast(to_base);
   Object* the_hole = from->GetHeap()->the_hole_value();
   for (uint32_t from_end = from_start + copy_size;
        from_start < from_end; from_start++, to_start++) {
@@ -431,23 +449,25 @@ static void CopyObjectToDoubleElements(FixedArray* from,
 }
 
 
-static void CopyDictionaryToDoubleElements(SeededNumberDictionary* from,
+static void CopyDictionaryToDoubleElements(FixedArrayBase* from_base,
                                            uint32_t from_start,
-                                           FixedDoubleArray* to,
+                                           FixedArrayBase* to_base,
                                            uint32_t to_start,
                                            int raw_copy_size) {
+  SeededNumberDictionary* from = SeededNumberDictionary::cast(from_base);
   int copy_size = raw_copy_size;
   if (copy_size < 0) {
     ASSERT(copy_size == ElementsAccessor::kCopyToEnd ||
            copy_size == ElementsAccessor::kCopyToEndAndInitializeToHole);
     copy_size = from->max_number_key() + 1 - from_start;
     if (raw_copy_size == ElementsAccessor::kCopyToEndAndInitializeToHole) {
-      for (int i = to_start + copy_size; i < to->length(); ++i) {
-        to->set_the_hole(i);
+      for (int i = to_start + copy_size; i < to_base->length(); ++i) {
+        FixedDoubleArray::cast(to_base)->set_the_hole(i);
       }
     }
   }
   if (copy_size == 0) return;
+  FixedDoubleArray* to = FixedDoubleArray::cast(to_base);
   uint32_t to_length = to->length();
   if (to_start + copy_size > to_length) {
     copy_size = to_length - to_start;
@@ -503,8 +523,8 @@ class ElementsAccessorBase : public ElementsAccessor {
     Map* map = fixed_array_base->map();
     // Arrays that have been shifted in place can't be verified.
     Heap* heap = holder->GetHeap();
-    if (map == heap->raw_unchecked_one_pointer_filler_map() ||
-        map == heap->raw_unchecked_two_pointer_filler_map() ||
+    if (map == heap->one_pointer_filler_map() ||
+        map == heap->two_pointer_filler_map() ||
         map == heap->free_space_map()) {
       return;
     }
@@ -527,10 +547,9 @@ class ElementsAccessorBase : public ElementsAccessor {
   static bool HasElementImpl(Object* receiver,
                              JSObject* holder,
                              uint32_t key,
-                             BackingStore* backing_store) {
-    MaybeObject* element =
-        ElementsAccessorSubclass::GetImpl(receiver, holder, key, backing_store);
-    return !element->IsTheHole();
+                             FixedArrayBase* backing_store) {
+    return ElementsAccessorSubclass::GetAttributesImpl(
+        receiver, holder, key, backing_store) != ABSENT;
   }
 
   virtual bool HasElement(Object* receiver,
@@ -541,7 +560,7 @@ class ElementsAccessorBase : public ElementsAccessor {
       backing_store = holder->elements();
     }
     return ElementsAccessorSubclass::HasElementImpl(
-        receiver, holder, key, BackingStore::cast(backing_store));
+        receiver, holder, key, backing_store);
   }
 
   MUST_USE_RESULT virtual MaybeObject* Get(Object* receiver,
@@ -552,28 +571,95 @@ class ElementsAccessorBase : public ElementsAccessor {
       backing_store = holder->elements();
     }
     return ElementsAccessorSubclass::GetImpl(
-        receiver, holder, key, BackingStore::cast(backing_store));
+        receiver, holder, key, backing_store);
   }
 
   MUST_USE_RESULT static MaybeObject* GetImpl(Object* receiver,
                                               JSObject* obj,
                                               uint32_t key,
-                                              BackingStore* backing_store) {
+                                              FixedArrayBase* backing_store) {
     return (key < ElementsAccessorSubclass::GetCapacityImpl(backing_store))
-           ? backing_store->get(key)
+           ? BackingStore::cast(backing_store)->get(key)
            : backing_store->GetHeap()->the_hole_value();
   }
 
+  MUST_USE_RESULT virtual PropertyAttributes GetAttributes(
+      Object* receiver,
+      JSObject* holder,
+      uint32_t key,
+      FixedArrayBase* backing_store) {
+    if (backing_store == NULL) {
+      backing_store = holder->elements();
+    }
+    return ElementsAccessorSubclass::GetAttributesImpl(
+        receiver, holder, key, backing_store);
+  }
+
+  MUST_USE_RESULT static PropertyAttributes GetAttributesImpl(
+        Object* receiver,
+        JSObject* obj,
+        uint32_t key,
+        FixedArrayBase* backing_store) {
+    if (key >= ElementsAccessorSubclass::GetCapacityImpl(backing_store)) {
+      return ABSENT;
+    }
+    return BackingStore::cast(backing_store)->is_the_hole(key) ? ABSENT : NONE;
+  }
+
+  MUST_USE_RESULT virtual PropertyType GetType(
+      Object* receiver,
+      JSObject* holder,
+      uint32_t key,
+      FixedArrayBase* backing_store) {
+    if (backing_store == NULL) {
+      backing_store = holder->elements();
+    }
+    return ElementsAccessorSubclass::GetTypeImpl(
+        receiver, holder, key, backing_store);
+  }
+
+  MUST_USE_RESULT static PropertyType GetTypeImpl(
+        Object* receiver,
+        JSObject* obj,
+        uint32_t key,
+        FixedArrayBase* backing_store) {
+    if (key >= ElementsAccessorSubclass::GetCapacityImpl(backing_store)) {
+      return NONEXISTENT;
+    }
+    return BackingStore::cast(backing_store)->is_the_hole(key)
+        ? NONEXISTENT : FIELD;
+  }
+
+  MUST_USE_RESULT virtual AccessorPair* GetAccessorPair(
+      Object* receiver,
+      JSObject* holder,
+      uint32_t key,
+      FixedArrayBase* backing_store) {
+    if (backing_store == NULL) {
+      backing_store = holder->elements();
+    }
+    return ElementsAccessorSubclass::GetAccessorPairImpl(
+        receiver, holder, key, backing_store);
+  }
+
+  MUST_USE_RESULT static AccessorPair* GetAccessorPairImpl(
+        Object* receiver,
+        JSObject* obj,
+        uint32_t key,
+        FixedArrayBase* backing_store) {
+    return NULL;
+  }
+
   MUST_USE_RESULT virtual MaybeObject* SetLength(JSArray* array,
                                                  Object* length) {
     return ElementsAccessorSubclass::SetLengthImpl(
-        array, length, BackingStore::cast(array->elements()));
+        array, length, array->elements());
   }
 
   MUST_USE_RESULT static MaybeObject* SetLengthImpl(
       JSObject* obj,
       Object* length,
-      BackingStore* backing_store);
+      FixedArrayBase* backing_store);
 
   MUST_USE_RESULT virtual MaybeObject* SetCapacityAndLength(
       JSArray* array,
@@ -631,9 +717,6 @@ class ElementsAccessorBase : public ElementsAccessor {
         }
       }
     }
-    if (from->length() == 0) {
-      return from;
-    }
     return ElementsAccessorSubclass::CopyElementsImpl(
         from, from_start, to, to_kind, to_start, packed_size, copy_size);
   }
@@ -654,25 +737,22 @@ class ElementsAccessorBase : public ElementsAccessor {
     if (from == NULL) {
       from = holder->elements();
     }
-    BackingStore* backing_store = BackingStore::cast(from);
-    uint32_t len1 = ElementsAccessorSubclass::GetCapacityImpl(backing_store);
 
     // Optimize if 'other' is empty.
     // We cannot optimize if 'this' is empty, as other may have holes.
+    uint32_t len1 = ElementsAccessorSubclass::GetCapacityImpl(from);
     if (len1 == 0) return to;
 
     // Compute how many elements are not in other.
     uint32_t extra = 0;
     for (uint32_t y = 0; y < len1; y++) {
-      uint32_t key =
-          ElementsAccessorSubclass::GetKeyForIndexImpl(backing_store, y);
+      uint32_t key = ElementsAccessorSubclass::GetKeyForIndexImpl(from, y);
       if (ElementsAccessorSubclass::HasElementImpl(
-              receiver, holder, key, backing_store)) {
+              receiver, holder, key, from)) {
         MaybeObject* maybe_value =
-            ElementsAccessorSubclass::GetImpl(receiver, holder,
-                                              key, backing_store);
+            ElementsAccessorSubclass::GetImpl(receiver, holder, key, from);
         Object* value;
-        if (!maybe_value->ToObject(&value)) return maybe_value;
+        if (!maybe_value->To(&value)) return maybe_value;
         ASSERT(!value->IsTheHole());
         if (!HasKey(to, value)) {
           extra++;
@@ -684,9 +764,8 @@ class ElementsAccessorBase : public ElementsAccessor {
 
     // Allocate the result
     FixedArray* result;
-    MaybeObject* maybe_obj =
-        backing_store->GetHeap()->AllocateFixedArray(len0 + extra);
-    if (!maybe_obj->To<FixedArray>(&result)) return maybe_obj;
+    MaybeObject* maybe_obj = from->GetHeap()->AllocateFixedArray(len0 + extra);
+    if (!maybe_obj->To(&result)) return maybe_obj;
 
     // Fill in the content
     {
@@ -702,14 +781,13 @@ class ElementsAccessorBase : public ElementsAccessor {
     uint32_t index = 0;
     for (uint32_t y = 0; y < len1; y++) {
       uint32_t key =
-          ElementsAccessorSubclass::GetKeyForIndexImpl(backing_store, y);
+          ElementsAccessorSubclass::GetKeyForIndexImpl(from, y);
       if (ElementsAccessorSubclass::HasElementImpl(
-              receiver, holder, key, backing_store)) {
+              receiver, holder, key, from)) {
         MaybeObject* maybe_value =
-            ElementsAccessorSubclass::GetImpl(receiver, holder,
-                                              key, backing_store);
+            ElementsAccessorSubclass::GetImpl(receiver, holder, key, from);
         Object* value;
-        if (!maybe_value->ToObject(&value)) return maybe_value;
+        if (!maybe_value->To(&value)) return maybe_value;
         if (!value->IsTheHole() && !HasKey(to, value)) {
           result->set(len0 + index, value);
           index++;
@@ -721,24 +799,22 @@ class ElementsAccessorBase : public ElementsAccessor {
   }
 
  protected:
-  static uint32_t GetCapacityImpl(BackingStore* backing_store) {
+  static uint32_t GetCapacityImpl(FixedArrayBase* backing_store) {
     return backing_store->length();
   }
 
   virtual uint32_t GetCapacity(FixedArrayBase* backing_store) {
-    return ElementsAccessorSubclass::GetCapacityImpl(
-        BackingStore::cast(backing_store));
+    return ElementsAccessorSubclass::GetCapacityImpl(backing_store);
   }
 
-  static uint32_t GetKeyForIndexImpl(BackingStore* backing_store,
+  static uint32_t GetKeyForIndexImpl(FixedArrayBase* backing_store,
                                      uint32_t index) {
     return index;
   }
 
   virtual uint32_t GetKeyForIndex(FixedArrayBase* backing_store,
                                   uint32_t index) {
-    return ElementsAccessorSubclass::GetKeyForIndexImpl(
-        BackingStore::cast(backing_store), index);
+    return ElementsAccessorSubclass::GetKeyForIndexImpl(backing_store, index);
   }
 
  private:
@@ -764,17 +840,17 @@ class FastElementsAccessor
 
   // Adjusts the length of the fast backing store or returns the new length or
   // undefined in case conversion to a slow backing store should be performed.
-  static MaybeObject* SetLengthWithoutNormalize(BackingStore* backing_store,
+  static MaybeObject* SetLengthWithoutNormalize(FixedArrayBase* backing_store,
                                                 JSArray* array,
                                                 Object* length_object,
                                                 uint32_t length) {
     uint32_t old_capacity = backing_store->length();
     Object* old_length = array->length();
-    bool same_size = old_length->IsSmi() &&
-        static_cast<uint32_t>(Smi::cast(old_length)->value()) == length;
+    bool same_or_smaller_size = old_length->IsSmi() &&
+        static_cast<uint32_t>(Smi::cast(old_length)->value()) >= length;
     ElementsKind kind = array->GetElementsKind();
 
-    if (!same_size && IsFastElementsKind(kind) &&
+    if (!same_or_smaller_size && IsFastElementsKind(kind) &&
         !IsFastHoleyElementsKind(kind)) {
       kind = GetHoleyElementsKind(kind);
       MaybeObject* maybe_obj = array->TransitionElementsKind(kind);
@@ -802,7 +878,7 @@ class FastElementsAccessor
         // Otherwise, fill the unused tail with holes.
         int old_length = FastD2IChecked(array->length()->Number());
         for (int i = length; i < old_length; i++) {
-          backing_store->set_the_hole(i);
+          BackingStore::cast(backing_store)->set_the_hole(i);
         }
       }
       return length_object;
@@ -829,32 +905,38 @@ class FastElementsAccessor
     ASSERT(obj->HasFastSmiOrObjectElements() ||
            obj->HasFastDoubleElements() ||
            obj->HasFastArgumentsElements());
-    typename KindTraits::BackingStore* backing_store =
-        KindTraits::BackingStore::cast(obj->elements());
     Heap* heap = obj->GetHeap();
-    if (backing_store->map() == heap->non_strict_arguments_elements_map()) {
-      backing_store =
-          KindTraits::BackingStore::cast(
-              FixedArray::cast(backing_store)->get(1));
-    } else {
-      ElementsKind kind = KindTraits::Kind;
-      if (IsFastPackedElementsKind(kind)) {
-        MaybeObject* transitioned =
-            obj->TransitionElementsKind(GetHoleyElementsKind(kind));
-        if (transitioned->IsFailure()) return transitioned;
-      }
-      if (IsFastSmiOrObjectElementsKind(KindTraits::Kind)) {
-        Object* writable;
-        MaybeObject* maybe = obj->EnsureWritableFastElements();
-        if (!maybe->ToObject(&writable)) return maybe;
-        backing_store = KindTraits::BackingStore::cast(writable);
-      }
+    Object* elements = obj->elements();
+    if (elements == heap->empty_fixed_array()) {
+      return heap->true_value();
+    }
+    typename KindTraits::BackingStore* backing_store =
+        KindTraits::BackingStore::cast(elements);
+    bool is_non_strict_arguments_elements_map =
+        backing_store->map() == heap->non_strict_arguments_elements_map();
+    if (is_non_strict_arguments_elements_map) {
+      backing_store = KindTraits::BackingStore::cast(
+          FixedArray::cast(backing_store)->get(1));
     }
     uint32_t length = static_cast<uint32_t>(
         obj->IsJSArray()
         ? Smi::cast(JSArray::cast(obj)->length())->value()
         : backing_store->length());
     if (key < length) {
+      if (!is_non_strict_arguments_elements_map) {
+        ElementsKind kind = KindTraits::Kind;
+        if (IsFastPackedElementsKind(kind)) {
+          MaybeObject* transitioned =
+              obj->TransitionElementsKind(GetHoleyElementsKind(kind));
+          if (transitioned->IsFailure()) return transitioned;
+        }
+        if (IsFastSmiOrObjectElementsKind(KindTraits::Kind)) {
+          Object* writable;
+          MaybeObject* maybe = obj->EnsureWritableFastElements();
+          if (!maybe->ToObject(&writable)) return maybe;
+          backing_store = KindTraits::BackingStore::cast(writable);
+        }
+      }
       backing_store->set_the_hole(key);
       // If an old space backing store is larger than a certain size and
       // has too few used values, normalize it.
@@ -890,11 +972,11 @@ class FastElementsAccessor
       Object* receiver,
       JSObject* holder,
       uint32_t key,
-      typename KindTraits::BackingStore* backing_store) {
+      FixedArrayBase* backing_store) {
     if (key >= static_cast<uint32_t>(backing_store->length())) {
       return false;
     }
-    return !backing_store->is_the_hole(key);
+    return !BackingStore::cast(backing_store)->is_the_hole(key);
   }
 
   static void ValidateContents(JSObject* holder, int length) {
@@ -942,25 +1024,18 @@ class FastSmiOrObjectElementsAccessor
                                        int copy_size) {
     if (IsFastSmiOrObjectElementsKind(to_kind)) {
       CopyObjectToObjectElements(
-          FixedArray::cast(from), KindTraits::Kind, from_start,
-          FixedArray::cast(to), to_kind, to_start, copy_size);
+          from, KindTraits::Kind, from_start, to, to_kind, to_start, copy_size);
     } else if (IsFastDoubleElementsKind(to_kind)) {
       if (IsFastSmiElementsKind(KindTraits::Kind)) {
         if (IsFastPackedElementsKind(KindTraits::Kind) &&
             packed_size != kPackedSizeNotKnown) {
           CopyPackedSmiToDoubleElements(
-              FixedArray::cast(from), from_start,
-              FixedDoubleArray::cast(to), to_start,
-              packed_size, copy_size);
+              from, from_start, to, to_start, packed_size, copy_size);
         } else {
-          CopySmiToDoubleElements(
-              FixedArray::cast(from), from_start,
-              FixedDoubleArray::cast(to), to_start, copy_size);
+          CopySmiToDoubleElements(from, from_start, to, to_start, copy_size);
         }
       } else {
-        CopyObjectToDoubleElements(
-            FixedArray::cast(from), from_start,
-            FixedDoubleArray::cast(to), to_start, copy_size);
+        CopyObjectToDoubleElements(from, from_start, to, to_start, copy_size);
       }
     } else {
       UNREACHABLE();
@@ -1064,13 +1139,10 @@ class FastDoubleElementsAccessor
       case FAST_HOLEY_SMI_ELEMENTS:
       case FAST_HOLEY_ELEMENTS:
         return CopyDoubleToObjectElements(
-            FixedDoubleArray::cast(from), from_start, FixedArray::cast(to),
-            to_kind, to_start, copy_size);
+            from, from_start, to, to_kind, to_start, copy_size);
       case FAST_DOUBLE_ELEMENTS:
       case FAST_HOLEY_DOUBLE_ELEMENTS:
-        CopyDoubleToDoubleElements(FixedDoubleArray::cast(from), from_start,
-                                   FixedDoubleArray::cast(to),
-                                   to_start, copy_size);
+        CopyDoubleToDoubleElements(from, from_start, to, to_start, copy_size);
         return from;
       default:
         UNREACHABLE();
@@ -1129,17 +1201,37 @@ class ExternalElementsAccessor
   MUST_USE_RESULT static MaybeObject* GetImpl(Object* receiver,
                                               JSObject* obj,
                                               uint32_t key,
-                                              BackingStore* backing_store) {
+                                              FixedArrayBase* backing_store) {
     return
         key < ExternalElementsAccessorSubclass::GetCapacityImpl(backing_store)
-        ? backing_store->get(key)
+        ? BackingStore::cast(backing_store)->get(key)
         : backing_store->GetHeap()->undefined_value();
   }
 
+  MUST_USE_RESULT static PropertyAttributes GetAttributesImpl(
+      Object* receiver,
+      JSObject* obj,
+      uint32_t key,
+      FixedArrayBase* backing_store) {
+    return
+        key < ExternalElementsAccessorSubclass::GetCapacityImpl(backing_store)
+          ? NONE : ABSENT;
+  }
+
+  MUST_USE_RESULT static PropertyType GetTypeImpl(
+      Object* receiver,
+      JSObject* obj,
+      uint32_t key,
+      FixedArrayBase* backing_store) {
+    return
+        key < ExternalElementsAccessorSubclass::GetCapacityImpl(backing_store)
+          ? FIELD : NONEXISTENT;
+  }
+
   MUST_USE_RESULT static MaybeObject* SetLengthImpl(
       JSObject* obj,
       Object* length,
-      BackingStore* backing_store) {
+      FixedArrayBase* backing_store) {
     // External arrays do not support changing their length.
     UNREACHABLE();
     return obj;
@@ -1155,7 +1247,7 @@ class ExternalElementsAccessor
   static bool HasElementImpl(Object* receiver,
                              JSObject* holder,
                              uint32_t key,
-                             BackingStore* backing_store) {
+                             FixedArrayBase* backing_store) {
     uint32_t capacity =
         ExternalElementsAccessorSubclass::GetCapacityImpl(backing_store);
     return key < capacity;
@@ -1264,11 +1356,35 @@ class DictionaryElementsAccessor
   // Adjusts the length of the dictionary backing store and returns the new
   // length according to ES5 section 15.4.5.2 behavior.
   MUST_USE_RESULT static MaybeObject* SetLengthWithoutNormalize(
-      SeededNumberDictionary* dict,
+      FixedArrayBase* store,
       JSArray* array,
       Object* length_object,
       uint32_t length) {
-    if (length == 0) {
+    SeededNumberDictionary* dict = SeededNumberDictionary::cast(store);
+    Heap* heap = array->GetHeap();
+    int capacity = dict->Capacity();
+    uint32_t new_length = length;
+    uint32_t old_length = static_cast<uint32_t>(array->length()->Number());
+    if (new_length < old_length) {
+      // Find last non-deletable element in range of elements to be
+      // deleted and adjust range accordingly.
+      for (int i = 0; i < capacity; i++) {
+        Object* key = dict->KeyAt(i);
+        if (key->IsNumber()) {
+          uint32_t number = static_cast<uint32_t>(key->Number());
+          if (new_length <= number && number < old_length) {
+            PropertyDetails details = dict->DetailsAt(i);
+            if (details.IsDontDelete()) new_length = number + 1;
+          }
+        }
+      }
+      if (new_length != length) {
+        MaybeObject* maybe_object = heap->NumberFromUint32(new_length);
+        if (!maybe_object->To(&length_object)) return maybe_object;
+      }
+    }
+
+    if (new_length == 0) {
       // If the length of a slow array is reset to zero, we clear
       // the array and flush backing storage. This has the added
       // benefit that the array returns to fast mode.
@@ -1276,45 +1392,22 @@ class DictionaryElementsAccessor
       MaybeObject* maybe_obj = array->ResetElements();
       if (!maybe_obj->ToObject(&obj)) return maybe_obj;
     } else {
-      uint32_t new_length = length;
-      uint32_t old_length = static_cast<uint32_t>(array->length()->Number());
-      if (new_length < old_length) {
-        // Find last non-deletable element in range of elements to be
-        // deleted and adjust range accordingly.
-        Heap* heap = array->GetHeap();
-        int capacity = dict->Capacity();
-        for (int i = 0; i < capacity; i++) {
-          Object* key = dict->KeyAt(i);
-          if (key->IsNumber()) {
-            uint32_t number = static_cast<uint32_t>(key->Number());
-            if (new_length <= number && number < old_length) {
-              PropertyDetails details = dict->DetailsAt(i);
-              if (details.IsDontDelete()) new_length = number + 1;
-            }
-          }
-        }
-        if (new_length != length) {
-          MaybeObject* maybe_object = heap->NumberFromUint32(new_length);
-          if (!maybe_object->To(&length_object)) return maybe_object;
-        }
-
-        // Remove elements that should be deleted.
-        int removed_entries = 0;
-        Object* the_hole_value = heap->the_hole_value();
-        for (int i = 0; i < capacity; i++) {
-          Object* key = dict->KeyAt(i);
-          if (key->IsNumber()) {
-            uint32_t number = static_cast<uint32_t>(key->Number());
-            if (new_length <= number && number < old_length) {
-              dict->SetEntry(i, the_hole_value, the_hole_value);
-              removed_entries++;
-            }
+      // Remove elements that should be deleted.
+      int removed_entries = 0;
+      Object* the_hole_value = heap->the_hole_value();
+      for (int i = 0; i < capacity; i++) {
+        Object* key = dict->KeyAt(i);
+        if (key->IsNumber()) {
+          uint32_t number = static_cast<uint32_t>(key->Number());
+          if (new_length <= number && number < old_length) {
+            dict->SetEntry(i, the_hole_value, the_hole_value);
+            removed_entries++;
           }
         }
-
-        // Update the number of elements.
-        dict->ElementsRemoved(removed_entries);
       }
+
+      // Update the number of elements.
+      dict->ElementsRemoved(removed_entries);
     }
     return length_object;
   }
@@ -1336,30 +1429,29 @@ class DictionaryElementsAccessor
     int entry = dictionary->FindEntry(key);
     if (entry != SeededNumberDictionary::kNotFound) {
       Object* result = dictionary->DeleteProperty(entry, mode);
-      if (result == heap->true_value()) {
-        MaybeObject* maybe_elements = dictionary->Shrink(key);
-        FixedArray* new_elements = NULL;
-        if (!maybe_elements->To(&new_elements)) {
-          return maybe_elements;
-        }
-        if (is_arguments) {
-          FixedArray::cast(obj->elements())->set(1, new_elements);
-        } else {
-          obj->set_elements(new_elements);
+      if (result == heap->false_value()) {
+        if (mode == JSObject::STRICT_DELETION) {
+          // Deleting a non-configurable property in strict mode.
+          HandleScope scope(isolate);
+          Handle<Object> holder(obj);
+          Handle<Object> name = isolate->factory()->NewNumberFromUint(key);
+          Handle<Object> args[2] = { name, holder };
+          Handle<Object> error =
+              isolate->factory()->NewTypeError("strict_delete_property",
+                                               HandleVector(args, 2));
+          return isolate->Throw(*error);
         }
+        return heap->false_value();
+      }
+      MaybeObject* maybe_elements = dictionary->Shrink(key);
+      FixedArray* new_elements = NULL;
+      if (!maybe_elements->To(&new_elements)) {
+        return maybe_elements;
       }
-      if (mode == JSObject::STRICT_DELETION &&
-          result == heap->false_value()) {
-        // In strict mode, attempting to delete a non-configurable property
-        // throws an exception.
-        HandleScope scope(isolate);
-        Handle<Object> holder(obj);
-        Handle<Object> name = isolate->factory()->NewNumberFromUint(key);
-        Handle<Object> args[2] = { name, holder };
-        Handle<Object> error =
-            isolate->factory()->NewTypeError("strict_delete_property",
-                                             HandleVector(args, 2));
-        return isolate->Throw(*error);
+      if (is_arguments) {
+        FixedArray::cast(obj->elements())->set(1, new_elements);
+      } else {
+        obj->set_elements(new_elements);
       }
     }
     return heap->true_value();
@@ -1378,14 +1470,12 @@ class DictionaryElementsAccessor
       case FAST_HOLEY_SMI_ELEMENTS:
       case FAST_HOLEY_ELEMENTS:
         CopyDictionaryToObjectElements(
-            SeededNumberDictionary::cast(from), from_start,
-            FixedArray::cast(to), to_kind, to_start, copy_size);
+            from, from_start, to, to_kind, to_start, copy_size);
         return from;
       case FAST_DOUBLE_ELEMENTS:
       case FAST_HOLEY_DOUBLE_ELEMENTS:
         CopyDictionaryToDoubleElements(
-            SeededNumberDictionary::cast(from), from_start,
-            FixedDoubleArray::cast(to), to_start, copy_size);
+            from, from_start, to, to_start, copy_size);
         return from;
       default:
         UNREACHABLE();
@@ -1408,7 +1498,8 @@ class DictionaryElementsAccessor
       Object* receiver,
       JSObject* obj,
       uint32_t key,
-      SeededNumberDictionary* backing_store) {
+      FixedArrayBase* store) {
+    SeededNumberDictionary* backing_store = SeededNumberDictionary::cast(store);
     int entry = backing_store->FindEntry(key);
     if (entry != SeededNumberDictionary::kNotFound) {
       Object* element = backing_store->ValueAt(entry);
@@ -1425,16 +1516,59 @@ class DictionaryElementsAccessor
     return obj->GetHeap()->the_hole_value();
   }
 
+  MUST_USE_RESULT static PropertyAttributes GetAttributesImpl(
+      Object* receiver,
+      JSObject* obj,
+      uint32_t key,
+      FixedArrayBase* backing_store) {
+    SeededNumberDictionary* dictionary =
+        SeededNumberDictionary::cast(backing_store);
+    int entry = dictionary->FindEntry(key);
+    if (entry != SeededNumberDictionary::kNotFound) {
+      return dictionary->DetailsAt(entry).attributes();
+    }
+    return ABSENT;
+  }
+
+  MUST_USE_RESULT static PropertyType GetTypeImpl(
+      Object* receiver,
+      JSObject* obj,
+      uint32_t key,
+      FixedArrayBase* store) {
+    SeededNumberDictionary* backing_store = SeededNumberDictionary::cast(store);
+    int entry = backing_store->FindEntry(key);
+    if (entry != SeededNumberDictionary::kNotFound) {
+      return backing_store->DetailsAt(entry).type();
+    }
+    return NONEXISTENT;
+  }
+
+  MUST_USE_RESULT static AccessorPair* GetAccessorPairImpl(
+      Object* receiver,
+      JSObject* obj,
+      uint32_t key,
+      FixedArrayBase* store) {
+    SeededNumberDictionary* backing_store = SeededNumberDictionary::cast(store);
+    int entry = backing_store->FindEntry(key);
+    if (entry != SeededNumberDictionary::kNotFound &&
+        backing_store->DetailsAt(entry).type() == CALLBACKS &&
+        backing_store->ValueAt(entry)->IsAccessorPair()) {
+      return AccessorPair::cast(backing_store->ValueAt(entry));
+    }
+    return NULL;
+  }
+
   static bool HasElementImpl(Object* receiver,
                              JSObject* holder,
                              uint32_t key,
-                             SeededNumberDictionary* backing_store) {
-    return backing_store->FindEntry(key) !=
+                             FixedArrayBase* backing_store) {
+    return SeededNumberDictionary::cast(backing_store)->FindEntry(key) !=
         SeededNumberDictionary::kNotFound;
   }
 
-  static uint32_t GetKeyForIndexImpl(SeededNumberDictionary* dict,
+  static uint32_t GetKeyForIndexImpl(FixedArrayBase* store,
                                      uint32_t index) {
+    SeededNumberDictionary* dict = SeededNumberDictionary::cast(store);
     Object* key = dict->KeyAt(index);
     return Smi::cast(key)->value();
   }
@@ -1457,7 +1591,8 @@ class NonStrictArgumentsElementsAccessor : public ElementsAccessorBase<
   MUST_USE_RESULT static MaybeObject* GetImpl(Object* receiver,
                                               JSObject* obj,
                                               uint32_t key,
-                                              FixedArray* parameter_map) {
+                                              FixedArrayBase* parameters) {
+    FixedArray* parameter_map = FixedArray::cast(parameters);
     Object* probe = GetParameterMapArg(obj, parameter_map, key);
     if (!probe->IsTheHole()) {
       Context* context = Context::cast(parameter_map->get(0));
@@ -1484,10 +1619,61 @@ class NonStrictArgumentsElementsAccessor : public ElementsAccessorBase<
     }
   }
 
+  MUST_USE_RESULT static PropertyAttributes GetAttributesImpl(
+      Object* receiver,
+      JSObject* obj,
+      uint32_t key,
+      FixedArrayBase* backing_store) {
+    FixedArray* parameter_map = FixedArray::cast(backing_store);
+    Object* probe = GetParameterMapArg(obj, parameter_map, key);
+    if (!probe->IsTheHole()) {
+      return NONE;
+    } else {
+      // If not aliased, check the arguments.
+      FixedArray* arguments = FixedArray::cast(parameter_map->get(1));
+      return ElementsAccessor::ForArray(arguments)->GetAttributes(
+          receiver, obj, key, arguments);
+    }
+  }
+
+  MUST_USE_RESULT static PropertyType GetTypeImpl(
+      Object* receiver,
+      JSObject* obj,
+      uint32_t key,
+      FixedArrayBase* parameters) {
+    FixedArray* parameter_map = FixedArray::cast(parameters);
+    Object* probe = GetParameterMapArg(obj, parameter_map, key);
+    if (!probe->IsTheHole()) {
+      return FIELD;
+    } else {
+      // If not aliased, check the arguments.
+      FixedArray* arguments = FixedArray::cast(parameter_map->get(1));
+      return ElementsAccessor::ForArray(arguments)->GetType(
+          receiver, obj, key, arguments);
+    }
+  }
+
+  MUST_USE_RESULT static AccessorPair* GetAccessorPairImpl(
+      Object* receiver,
+      JSObject* obj,
+      uint32_t key,
+      FixedArrayBase* parameters) {
+    FixedArray* parameter_map = FixedArray::cast(parameters);
+    Object* probe = GetParameterMapArg(obj, parameter_map, key);
+    if (!probe->IsTheHole()) {
+      return NULL;
+    } else {
+      // If not aliased, check the arguments.
+      FixedArray* arguments = FixedArray::cast(parameter_map->get(1));
+      return ElementsAccessor::ForArray(arguments)->GetAccessorPair(
+          receiver, obj, key, arguments);
+    }
+  }
+
   MUST_USE_RESULT static MaybeObject* SetLengthImpl(
       JSObject* obj,
       Object* length,
-      FixedArray* parameter_map) {
+      FixedArrayBase* parameter_map) {
     // TODO(mstarzinger): This was never implemented but will be used once we
     // correctly implement [[DefineOwnProperty]] on arrays.
     UNIMPLEMENTED();
@@ -1526,19 +1712,20 @@ class NonStrictArgumentsElementsAccessor : public ElementsAccessorBase<
                                                        int packed_size,
                                                        int copy_size) {
     FixedArray* parameter_map = FixedArray::cast(from);
-    FixedArray* arguments = FixedArray::cast(parameter_map->get(1));
+    FixedArrayBase* arguments = FixedArrayBase::cast(parameter_map->get(1));
     ElementsAccessor* accessor = ElementsAccessor::ForArray(arguments);
     return accessor->CopyElements(NULL, from_start, to, to_kind,
                                   to_start, copy_size, arguments);
   }
 
-  static uint32_t GetCapacityImpl(FixedArray* parameter_map) {
+  static uint32_t GetCapacityImpl(FixedArrayBase* backing_store) {
+    FixedArray* parameter_map = FixedArray::cast(backing_store);
     FixedArrayBase* arguments = FixedArrayBase::cast(parameter_map->get(1));
     return Max(static_cast<uint32_t>(parameter_map->length() - 2),
                ForArray(arguments)->GetCapacity(arguments));
   }
 
-  static uint32_t GetKeyForIndexImpl(FixedArray* dict,
+  static uint32_t GetKeyForIndexImpl(FixedArrayBase* dict,
                                      uint32_t index) {
     return index;
   }
@@ -1546,12 +1733,14 @@ class NonStrictArgumentsElementsAccessor : public ElementsAccessorBase<
   static bool HasElementImpl(Object* receiver,
                              JSObject* holder,
                              uint32_t key,
-                             FixedArray* parameter_map) {
+                             FixedArrayBase* parameters) {
+    FixedArray* parameter_map = FixedArray::cast(parameters);
     Object* probe = GetParameterMapArg(holder, parameter_map, key);
     if (!probe->IsTheHole()) {
       return true;
     } else {
-      FixedArrayBase* arguments = FixedArrayBase::cast(parameter_map->get(1));
+      FixedArrayBase* arguments =
+          FixedArrayBase::cast(FixedArray::cast(parameter_map)->get(1));
       ElementsAccessor* accessor = ElementsAccessor::ForArray(arguments);
       return !accessor->Get(receiver, holder, key, arguments)->IsTheHole();
     }
@@ -1564,7 +1753,7 @@ class NonStrictArgumentsElementsAccessor : public ElementsAccessorBase<
     uint32_t length = holder->IsJSArray()
         ? Smi::cast(JSArray::cast(holder)->length())->value()
         : parameter_map->length();
-    return key < (length - 2 )
+    return key < (length - 2)
         ? parameter_map->get(key + 2)
         : parameter_map->GetHeap()->the_hole_value();
   }
@@ -1631,7 +1820,7 @@ MUST_USE_RESULT MaybeObject* ElementsAccessorBase<ElementsAccessorSubclass,
                                                   ElementsKindTraits>::
     SetLengthImpl(JSObject* obj,
                   Object* length,
-                  typename ElementsKindTraits::BackingStore* backing_store) {
+                  FixedArrayBase* backing_store) {
   JSArray* array = JSArray::cast(obj);
 
   // Fast case: The new length fits into a Smi.
diff --git a/deps/v8/src/elements.h b/deps/v8/src/elements.h
index 822fca50ee..ffd6428ce9 100644
--- a/deps/v8/src/elements.h
+++ b/deps/v8/src/elements.h
@@ -71,6 +71,39 @@ class ElementsAccessor {
       uint32_t key,
       FixedArrayBase* backing_store = NULL) = 0;
 
+  // Returns an element's attributes, or ABSENT if there is no such
+  // element. This method doesn't iterate up the prototype chain.  The caller
+  // can optionally pass in the backing store to use for the check, which must
+  // be compatible with the ElementsKind of the ElementsAccessor. If
+  // backing_store is NULL, the holder->elements() is used as the backing store.
+  MUST_USE_RESULT virtual PropertyAttributes GetAttributes(
+      Object* receiver,
+      JSObject* holder,
+      uint32_t key,
+      FixedArrayBase* backing_store = NULL) = 0;
+
+  // Returns an element's type, or NONEXISTENT if there is no such
+  // element. This method doesn't iterate up the prototype chain.  The caller
+  // can optionally pass in the backing store to use for the check, which must
+  // be compatible with the ElementsKind of the ElementsAccessor. If
+  // backing_store is NULL, the holder->elements() is used as the backing store.
+  MUST_USE_RESULT virtual PropertyType GetType(
+      Object* receiver,
+      JSObject* holder,
+      uint32_t key,
+      FixedArrayBase* backing_store = NULL) = 0;
+
+  // Returns an element's accessors, or NULL if the element does not exist or
+  // is plain. This method doesn't iterate up the prototype chain.  The caller
+  // can optionally pass in the backing store to use for the check, which must
+  // be compatible with the ElementsKind of the ElementsAccessor. If
+  // backing_store is NULL, the holder->elements() is used as the backing store.
+  MUST_USE_RESULT virtual AccessorPair* GetAccessorPair(
+      Object* receiver,
+      JSObject* holder,
+      uint32_t key,
+      FixedArrayBase* backing_store = NULL) = 0;
+
   // Modifies the length data property as specified for JSArrays and resizes the
   // underlying backing store accordingly. The method honors the semantics of
   // changing array sizes as defined in EcmaScript 5.1 15.4.5.2, i.e. array that
@@ -164,16 +197,6 @@ class ElementsAccessor {
   DISALLOW_COPY_AND_ASSIGN(ElementsAccessor);
 };
 
-
-void CopyObjectToObjectElements(FixedArray* from_obj,
-                                ElementsKind from_kind,
-                                uint32_t from_start,
-                                FixedArray* to_obj,
-                                ElementsKind to_kind,
-                                uint32_t to_start,
-                                int copy_size);
-
-
 } }  // namespace v8::internal
 
 #endif  // V8_ELEMENTS_H_
diff --git a/deps/v8/src/execution.cc b/deps/v8/src/execution.cc
index 330e41fbc9..e43ea65fc6 100644
--- a/deps/v8/src/execution.cc
+++ b/deps/v8/src/execution.cc
@@ -118,7 +118,7 @@ static Handle<Object> Invoke(bool is_construct,
         CALL_GENERATED_CODE(stub_entry, function_entry, func, recv, argc, argv);
   }
 
-#ifdef DEBUG
+#ifdef VERIFY_HEAP
   value->Verify();
 #endif
 
@@ -211,6 +211,9 @@ Handle<Object> Execution::TryCall(Handle<JSFunction> func,
     Isolate* isolate = Isolate::Current();
     ASSERT(isolate->has_pending_exception());
     ASSERT(isolate->external_caught_exception());
+    if (isolate->is_out_of_memory() && !isolate->ignore_out_of_memory()) {
+      V8::FatalProcessOutOfMemory("OOM during Execution::TryCall");
+    }
     if (isolate->pending_exception() ==
         isolate->heap()->termination_exception()) {
       result = isolate->factory()->termination_exception();
@@ -427,25 +430,6 @@ void StackGuard::TerminateExecution() {
 }
 
 
-bool StackGuard::IsRuntimeProfilerTick() {
-  ExecutionAccess access(isolate_);
-  return (thread_local_.interrupt_flags_ & RUNTIME_PROFILER_TICK) != 0;
-}
-
-
-void StackGuard::RequestRuntimeProfilerTick() {
-  // Ignore calls if we're not optimizing or if we can't get the lock.
-  if (FLAG_opt && ExecutionAccess::TryLock(isolate_)) {
-    thread_local_.interrupt_flags_ |= RUNTIME_PROFILER_TICK;
-    if (thread_local_.postpone_interrupts_nesting_ == 0) {
-      thread_local_.jslimit_ = thread_local_.climit_ = kInterruptLimit;
-      isolate_->heap()->SetStackLimits();
-    }
-    ExecutionAccess::Unlock(isolate_);
-  }
-}
-
-
 void StackGuard::RequestCodeReadyEvent() {
   ASSERT(FLAG_parallel_recompilation);
   if (ExecutionAccess::TryLock(isolate_)) {
@@ -937,18 +921,14 @@ MaybeObject* Execution::HandleStackGuardInterrupt(Isolate* isolate) {
     }
     stack_guard->Continue(CODE_READY);
   }
-  if (!stack_guard->IsTerminateExecution()) {
+  if (!stack_guard->IsTerminateExecution() &&
+      !FLAG_manual_parallel_recompilation) {
     isolate->optimizing_compiler_thread()->InstallOptimizedFunctions();
   }
 
   isolate->counters()->stack_interrupts()->Increment();
-  // If FLAG_count_based_interrupts, every interrupt is a profiler interrupt.
-  if (FLAG_count_based_interrupts ||
-      stack_guard->IsRuntimeProfilerTick()) {
-    isolate->counters()->runtime_profiler_ticks()->Increment();
-    stack_guard->Continue(RUNTIME_PROFILER_TICK);
-    isolate->runtime_profiler()->OptimizeNow();
-  }
+  isolate->counters()->runtime_profiler_ticks()->Increment();
+  isolate->runtime_profiler()->OptimizeNow();
 #ifdef ENABLE_DEBUGGER_SUPPORT
   if (stack_guard->IsDebugBreak() || stack_guard->IsDebugCommand()) {
     DebugBreakHelper();
diff --git a/deps/v8/src/execution.h b/deps/v8/src/execution.h
index 9f5d9ff2cd..448b8d68ac 100644
--- a/deps/v8/src/execution.h
+++ b/deps/v8/src/execution.h
@@ -41,9 +41,8 @@ enum InterruptFlag {
   DEBUGCOMMAND = 1 << 2,
   PREEMPT = 1 << 3,
   TERMINATE = 1 << 4,
-  RUNTIME_PROFILER_TICK = 1 << 5,
-  GC_REQUEST = 1 << 6,
-  CODE_READY = 1 << 7
+  GC_REQUEST = 1 << 5,
+  CODE_READY = 1 << 6
 };
 
 
@@ -194,8 +193,6 @@ class StackGuard {
   void Interrupt();
   bool IsTerminateExecution();
   void TerminateExecution();
-  bool IsRuntimeProfilerTick();
-  void RequestRuntimeProfilerTick();
   bool IsCodeReadyEvent();
   void RequestCodeReadyEvent();
 #ifdef ENABLE_DEBUGGER_SUPPORT
diff --git a/deps/v8/src/extensions/externalize-string-extension.cc b/deps/v8/src/extensions/externalize-string-extension.cc
index 50d876136f..a126a5a569 100644
--- a/deps/v8/src/extensions/externalize-string-extension.cc
+++ b/deps/v8/src/extensions/externalize-string-extension.cc
@@ -93,7 +93,7 @@ v8::Handle<v8::Value> ExternalizeStringExtension::Externalize(
     return v8::ThrowException(v8::String::New(
         "externalizeString() can't externalize twice."));
   }
-  if (string->IsAsciiRepresentation() && !force_two_byte) {
+  if (string->IsOneByteRepresentation() && !force_two_byte) {
     char* data = new char[string->length()];
     String::WriteToFlat(*string, data, 0, string->length());
     SimpleAsciiStringResource* resource = new SimpleAsciiStringResource(
@@ -127,7 +127,8 @@ v8::Handle<v8::Value> ExternalizeStringExtension::IsAscii(
     return v8::ThrowException(v8::String::New(
         "isAsciiString() requires a single string argument."));
   }
-  return Utils::OpenHandle(*args[0].As<v8::String>())->IsAsciiRepresentation() ?
+  return
+      Utils::OpenHandle(*args[0].As<v8::String>())->IsOneByteRepresentation() ?
       v8::True() : v8::False();
 }
 
diff --git a/deps/v8/src/extensions/gc-extension.cc b/deps/v8/src/extensions/gc-extension.cc
index f921552aaa..813b9219bf 100644
--- a/deps/v8/src/extensions/gc-extension.cc
+++ b/deps/v8/src/extensions/gc-extension.cc
@@ -40,7 +40,11 @@ v8::Handle<v8::FunctionTemplate> GCExtension::GetNativeFunction(
 
 
 v8::Handle<v8::Value> GCExtension::GC(const v8::Arguments& args) {
-  HEAP->CollectAllGarbage(Heap::kNoGCFlags, "gc extension");
+  if (args[0]->BooleanValue()) {
+    HEAP->CollectGarbage(NEW_SPACE, "gc extension");
+  } else {
+    HEAP->CollectAllGarbage(Heap::kNoGCFlags, "gc extension");
+  }
   return v8::Undefined();
 }
 
diff --git a/deps/v8/src/factory.cc b/deps/v8/src/factory.cc
index 462af590d2..556f2b01b7 100644
--- a/deps/v8/src/factory.cc
+++ b/deps/v8/src/factory.cc
@@ -112,10 +112,11 @@ Handle<ObjectHashTable> Factory::NewObjectHashTable(int at_least_space_for) {
 }
 
 
-Handle<DescriptorArray> Factory::NewDescriptorArray(int number_of_descriptors) {
+Handle<DescriptorArray> Factory::NewDescriptorArray(int number_of_descriptors,
+                                                    int slack) {
   ASSERT(0 <= number_of_descriptors);
   CALL_HEAP_FUNCTION(isolate(),
-                     DescriptorArray::Allocate(number_of_descriptors),
+                     DescriptorArray::Allocate(number_of_descriptors, slack),
                      DescriptorArray);
 }
 
@@ -177,7 +178,7 @@ Handle<String> Factory::LookupAsciiSymbol(Vector<const char> string) {
 }
 
 
-Handle<String> Factory::LookupAsciiSymbol(Handle<SeqAsciiString> string,
+Handle<String> Factory::LookupAsciiSymbol(Handle<SeqOneByteString> string,
                                           int from,
                                           int length) {
   CALL_HEAP_FUNCTION(isolate(),
@@ -199,7 +200,7 @@ Handle<String> Factory::NewStringFromAscii(Vector<const char> string,
                                            PretenureFlag pretenure) {
   CALL_HEAP_FUNCTION(
       isolate(),
-      isolate()->heap()->AllocateStringFromAscii(string, pretenure),
+      isolate()->heap()->AllocateStringFromOneByte(string, pretenure),
       String);
 }
 
@@ -221,12 +222,12 @@ Handle<String> Factory::NewStringFromTwoByte(Vector<const uc16> string,
 }
 
 
-Handle<SeqAsciiString> Factory::NewRawAsciiString(int length,
+Handle<SeqOneByteString> Factory::NewRawOneByteString(int length,
                                                   PretenureFlag pretenure) {
   CALL_HEAP_FUNCTION(
       isolate(),
-      isolate()->heap()->AllocateRawAsciiString(length, pretenure),
-      SeqAsciiString);
+      isolate()->heap()->AllocateRawOneByteString(length, pretenure),
+      SeqOneByteString);
 }
 
 
@@ -524,6 +525,12 @@ Handle<FixedArray> Factory::CopyFixedArray(Handle<FixedArray> array) {
 }
 
 
+Handle<FixedArray> Factory::CopySizeFixedArray(Handle<FixedArray> array,
+                                               int new_length) {
+  CALL_HEAP_FUNCTION(isolate(), array->CopySize(new_length), FixedArray);
+}
+
+
 Handle<FixedDoubleArray> Factory::CopyFixedDoubleArray(
     Handle<FixedDoubleArray> array) {
   CALL_HEAP_FUNCTION(isolate(), array->Copy(), FixedDoubleArray);
@@ -869,6 +876,13 @@ Handle<ScopeInfo> Factory::NewScopeInfo(int length) {
 }
 
 
+Handle<JSObject> Factory::NewExternal(void* value) {
+  CALL_HEAP_FUNCTION(isolate(),
+                     isolate()->heap()->AllocateExternal(value),
+                     JSObject);
+}
+
+
 Handle<Code> Factory::NewCode(const CodeDesc& desc,
                               Code::Flags flags,
                               Handle<Object> self_ref,
@@ -936,6 +950,9 @@ Handle<JSObject> Factory::NewJSObjectFromMap(Handle<Map> map) {
 Handle<JSArray> Factory::NewJSArray(int capacity,
                                     ElementsKind elements_kind,
                                     PretenureFlag pretenure) {
+  if (capacity != 0) {
+    elements_kind = GetHoleyElementsKind(elements_kind);
+  }
   CALL_HEAP_FUNCTION(isolate(),
                      isolate()->heap()->AllocateJSArrayAndStorage(
                          elements_kind,
@@ -954,6 +971,7 @@ Handle<JSArray> Factory::NewJSArrayWithElements(Handle<FixedArrayBase> elements,
       isolate(),
       isolate()->heap()->AllocateJSArrayWithElements(*elements,
                                                      elements_kind,
+                                                     elements->length(),
                                                      pretenure),
       JSArray);
 }
@@ -1284,10 +1302,26 @@ Handle<JSFunction> Factory::CreateApiFunction(
   result->shared()->DontAdaptArguments();
 
   // Recursively copy parent templates' accessors, 'data' may be modified.
+  int max_number_of_additional_properties = 0;
+  FunctionTemplateInfo* info = *obj;
+  while (true) {
+    Object* props = info->property_accessors();
+    if (!props->IsUndefined()) {
+      Handle<Object> props_handle(props);
+      NeanderArray props_array(props_handle);
+      max_number_of_additional_properties += props_array.length();
+    }
+    Object* parent = info->parent_template();
+    if (parent->IsUndefined()) break;
+    info = FunctionTemplateInfo::cast(parent);
+  }
+
+  Map::EnsureDescriptorSlack(map, max_number_of_additional_properties);
+
   while (true) {
     Handle<Object> props = Handle<Object>(obj->property_accessors());
     if (!props->IsUndefined()) {
-      Map::CopyAppendCallbackDescriptors(map, props);
+      Map::AppendCallbackDescriptors(map, props);
     }
     Handle<Object> parent = Handle<Object>(obj->parent_template());
     if (parent->IsUndefined()) break;
@@ -1336,7 +1370,7 @@ Handle<Map> Factory::ObjectLiteralMapFromCache(Handle<Context> context,
   // Check to see whether there is a matching element in the cache.
   Handle<MapCache> cache =
       Handle<MapCache>(MapCache::cast(context->map_cache()));
-  Handle<Object> result = Handle<Object>(cache->Lookup(*keys));
+  Handle<Object> result = Handle<Object>(cache->Lookup(*keys), isolate());
   if (result->IsMap()) return Handle<Map>::cast(result);
   // Create a new map and add it to the cache.
   Handle<Map> map =
@@ -1388,7 +1422,7 @@ void Factory::ConfigureInstance(Handle<FunctionTemplateInfo> desc,
                                 bool* pending_exception) {
   // Configure the instance by adding the properties specified by the
   // instance template.
-  Handle<Object> instance_template = Handle<Object>(desc->instance_template());
+  Handle<Object> instance_template(desc->instance_template(), isolate());
   if (!instance_template->IsUndefined()) {
     Execution::ConfigureInstance(instance,
                                  instance_template,
diff --git a/deps/v8/src/factory.h b/deps/v8/src/factory.h
index e617abb6d1..dd613b71e4 100644
--- a/deps/v8/src/factory.h
+++ b/deps/v8/src/factory.h
@@ -66,7 +66,8 @@ class Factory {
 
   Handle<ObjectHashTable> NewObjectHashTable(int at_least_space_for);
 
-  Handle<DescriptorArray> NewDescriptorArray(int number_of_descriptors);
+  Handle<DescriptorArray> NewDescriptorArray(int number_of_descriptors,
+                                             int slack = 0);
   Handle<DeoptimizationInputData> NewDeoptimizationInputData(
       int deopt_entry_count,
       PretenureFlag pretenure);
@@ -81,7 +82,7 @@ class Factory {
   Handle<String> LookupSymbol(Vector<const char> str);
   Handle<String> LookupSymbol(Handle<String> str);
   Handle<String> LookupAsciiSymbol(Vector<const char> str);
-  Handle<String> LookupAsciiSymbol(Handle<SeqAsciiString>,
+  Handle<String> LookupAsciiSymbol(Handle<SeqOneByteString>,
                                    int from,
                                    int length);
   Handle<String> LookupTwoByteSymbol(Vector<const uc16> str);
@@ -129,7 +130,7 @@ class Factory {
   // Allocates and partially initializes an ASCII or TwoByte String. The
   // characters of the string are uninitialized. Currently used in regexp code
   // only, where they are pretenured.
-  Handle<SeqAsciiString> NewRawAsciiString(
+  Handle<SeqOneByteString> NewRawOneByteString(
       int length,
       PretenureFlag pretenure = NOT_TENURED);
   Handle<SeqTwoByteString> NewRawTwoByteString(
@@ -238,6 +239,9 @@ class Factory {
 
   Handle<FixedArray> CopyFixedArray(Handle<FixedArray> array);
 
+  Handle<FixedArray> CopySizeFixedArray(Handle<FixedArray> array,
+                                        int new_length);
+
   Handle<FixedDoubleArray> CopyFixedDoubleArray(
       Handle<FixedDoubleArray> array);
 
@@ -324,6 +328,8 @@ class Factory {
 
   Handle<ScopeInfo> NewScopeInfo(int length);
 
+  Handle<JSObject> NewExternal(void* value);
+
   Handle<Code> NewCode(const CodeDesc& desc,
                        Code::Flags flags,
                        Handle<Object> self_reference,
diff --git a/deps/v8/src/flag-definitions.h b/deps/v8/src/flag-definitions.h
index d3ea89bdb7..338060f3fc 100644
--- a/deps/v8/src/flag-definitions.h
+++ b/deps/v8/src/flag-definitions.h
@@ -144,12 +144,16 @@ DEFINE_bool(harmony_modules, false,
 DEFINE_bool(harmony_proxies, false, "enable harmony proxies")
 DEFINE_bool(harmony_collections, false,
             "enable harmony collections (sets, maps, and weak maps)")
+DEFINE_bool(harmony_observation, false,
+            "enable harmony object observation (implies harmony collections")
 DEFINE_bool(harmony, false, "enable all harmony features (except typeof)")
 DEFINE_implication(harmony, harmony_scoping)
 DEFINE_implication(harmony, harmony_modules)
 DEFINE_implication(harmony, harmony_proxies)
 DEFINE_implication(harmony, harmony_collections)
+DEFINE_implication(harmony, harmony_observation)
 DEFINE_implication(harmony_modules, harmony_scoping)
+DEFINE_implication(harmony_observation, harmony_collections)
 
 // Flags for experimental implementation features.
 DEFINE_bool(packed_arrays, true, "optimizes arrays that have no holes")
@@ -177,6 +181,7 @@ DEFINE_int(max_inlined_nodes, 196,
 DEFINE_int(max_inlined_nodes_cumulative, 196,
            "maximum cumulative number of AST nodes considered for inlining")
 DEFINE_bool(loop_invariant_code_motion, true, "loop invariant code motion")
+DEFINE_bool(fast_math, true, "faster (but maybe less accurate) math functions")
 DEFINE_bool(collect_megamorphic_maps_from_stub_cache,
             true,
             "crankshaft harvests type feedback from stub cache")
@@ -198,10 +203,12 @@ DEFINE_bool(trap_on_deopt, false, "put a break point before deoptimizing")
 DEFINE_bool(deoptimize_uncommon_cases, true, "deoptimize uncommon cases")
 DEFINE_bool(polymorphic_inlining, true, "polymorphic inlining")
 DEFINE_bool(use_osr, true, "use on-stack replacement")
-DEFINE_bool(array_bounds_checks_elimination, false,
+DEFINE_bool(array_bounds_checks_elimination, true,
             "perform array bounds checks elimination")
-DEFINE_bool(array_index_dehoisting, false,
+DEFINE_bool(array_index_dehoisting, true,
             "perform array index dehoisting")
+DEFINE_bool(dead_code_elimination, true, "use dead code elimination")
+DEFINE_bool(trace_dead_code_elimination, false, "trace dead code elimination")
 
 DEFINE_bool(trace_osr, false, "trace on-stack replacement")
 DEFINE_int(stress_runs, 0, "number of stress runs")
@@ -219,7 +226,7 @@ DEFINE_int(loop_weight, 1, "loop weight for representation inference")
 DEFINE_bool(optimize_for_in, true,
             "optimize functions containing for-in loops")
 DEFINE_bool(opt_safe_uint32_operations, true,
-            "allow uint32 values on optimize frames if they are used only in"
+            "allow uint32 values on optimize frames if they are used only in "
             "safe operations")
 
 DEFINE_bool(parallel_recompilation, false,
@@ -227,6 +234,9 @@ DEFINE_bool(parallel_recompilation, false,
 DEFINE_bool(trace_parallel_recompilation, false, "track parallel recompilation")
 DEFINE_int(parallel_recompilation_queue_length, 2,
            "the length of the parallel compilation queue")
+DEFINE_bool(manual_parallel_recompilation, false,
+            "disable automatic optimization")
+DEFINE_implication(manual_parallel_recompilation, parallel_recompilation)
 
 // Experimental profiler changes.
 DEFINE_bool(experimental_profiler, true, "enable all profiler experiments")
@@ -237,8 +247,6 @@ DEFINE_bool(self_optimization, false,
 DEFINE_bool(direct_self_opt, false,
             "call recompile stub directly when self-optimizing")
 DEFINE_bool(retry_self_opt, false, "re-try self-optimization if it failed")
-DEFINE_bool(count_based_interrupts, false,
-            "trigger profiler ticks based on counting instead of timing")
 DEFINE_bool(interrupt_at_exit, false,
             "insert an interrupt check at function exit")
 DEFINE_bool(weighted_back_edges, false,
@@ -254,7 +262,6 @@ DEFINE_implication(experimental_profiler, watch_ic_patching)
 DEFINE_implication(experimental_profiler, self_optimization)
 // Not implying direct_self_opt here because it seems to be a bad idea.
 DEFINE_implication(experimental_profiler, retry_self_opt)
-DEFINE_implication(experimental_profiler, count_based_interrupts)
 DEFINE_implication(experimental_profiler, interrupt_at_exit)
 DEFINE_implication(experimental_profiler, weighted_back_edges)
 
@@ -284,6 +291,13 @@ DEFINE_bool(enable_vfp2, true,
             "enable use of VFP2 instructions if available")
 DEFINE_bool(enable_armv7, true,
             "enable use of ARMv7 instructions if available (ARM only)")
+DEFINE_bool(enable_sudiv, true,
+            "enable use of SDIV and UDIV instructions if available (ARM only)")
+DEFINE_bool(enable_movw_movt, false,
+            "enable loading 32-bit constant by means of movw/movt "
+            "instruction pairs (ARM only)")
+DEFINE_bool(enable_unaligned_accesses, true,
+            "enable unaligned accesses for ARMv7 (ARM only)")
 DEFINE_bool(enable_fpu, true,
             "enable use of MIPS FPU instructions if available (MIPS only)")
 
@@ -380,13 +394,21 @@ DEFINE_bool(trace_external_memory, false,
 DEFINE_bool(collect_maps, true,
             "garbage collect maps from which no objects can be reached")
 DEFINE_bool(flush_code, true,
-            "flush code that we expect not to use again before full gc")
+            "flush code that we expect not to use again (during full gc)")
+DEFINE_bool(flush_code_incrementally, true,
+            "flush code that we expect not to use again (incrementally)")
+DEFINE_bool(age_code, true,
+            "track un-executed functions to age code and flush only "
+            "old code")
 DEFINE_bool(incremental_marking, true, "use incremental marking")
 DEFINE_bool(incremental_marking_steps, true, "do incremental marking steps")
 DEFINE_bool(trace_incremental_marking, false,
             "trace progress of the incremental marking")
 DEFINE_bool(track_gc_object_stats, false,
             "track object counts and memory usage")
+#ifdef VERIFY_HEAP
+DEFINE_bool(verify_heap, false, "verify heap pointers before and after GC")
+#endif
 
 // v8.cc
 DEFINE_bool(use_idle_notification, true,
@@ -412,9 +434,14 @@ DEFINE_bool(never_compact, false,
             "Never perform compaction on full GC - testing only")
 DEFINE_bool(compact_code_space, true,
             "Compact code space on full non-incremental collections")
+DEFINE_bool(incremental_code_compaction, true,
+            "Compact code space on full incremental collections")
 DEFINE_bool(cleanup_code_caches_at_gc, true,
             "Flush inline caches prior to mark compact collection and "
             "flush code caches in maps during mark compact cycle.")
+DEFINE_bool(use_marking_progress_bar, true,
+            "Use a progress bar to scan large objects in increments when "
+            "incremental marking is active.")
 DEFINE_int(random_seed, 0,
            "Default seed for initializing random generator "
            "(0, the default, means to use system random).")
@@ -558,7 +585,6 @@ DEFINE_bool(gc_greedy, false, "perform GC prior to some allocations")
 DEFINE_bool(gc_verbose, false, "print stuff during garbage collection")
 DEFINE_bool(heap_stats, false, "report heap statistics before and after GC")
 DEFINE_bool(code_stats, false, "report code statistics after GC")
-DEFINE_bool(verify_heap, false, "verify heap pointers before and after GC")
 DEFINE_bool(verify_native_context_separation, false,
             "verify that code holds on to at most one native context after GC")
 DEFINE_bool(print_handles, false, "report handles after GC")
@@ -629,12 +655,14 @@ DEFINE_bool(prof_lazy, false,
 DEFINE_bool(prof_browser_mode, true,
             "Used with --prof, turns on browser-compatible mode for profiling.")
 DEFINE_bool(log_regexp, false, "Log regular expression execution.")
-DEFINE_bool(sliding_state_window, false,
-            "Update sliding state window counters.")
 DEFINE_string(logfile, "v8.log", "Specify the name of the log file.")
 DEFINE_bool(ll_prof, false, "Enable low-level linux profiler.")
 DEFINE_string(gc_fake_mmap, "/tmp/__v8_gc__",
               "Specify the name of the file for fake gc mmap used in ll_prof")
+DEFINE_bool(log_internal_timer_events, false, "Time internal events.")
+DEFINE_bool(log_timer_events, false,
+            "Time events including external callbacks.")
+DEFINE_implication(log_timer_events, log_internal_timer_events)
 
 //
 // Disassembler only flags
diff --git a/deps/v8/src/frames.cc b/deps/v8/src/frames.cc
index 18dc54164a..3b60fb59fa 100644
--- a/deps/v8/src/frames.cc
+++ b/deps/v8/src/frames.cc
@@ -484,7 +484,7 @@ Address StackFrame::UnpaddedFP() const {
 
 
 Code* EntryFrame::unchecked_code() const {
-  return HEAP->raw_unchecked_js_entry_code();
+  return HEAP->js_entry_code();
 }
 
 
@@ -507,7 +507,7 @@ StackFrame::Type EntryFrame::GetCallerState(State* state) const {
 
 
 Code* EntryConstructFrame::unchecked_code() const {
-  return HEAP->raw_unchecked_js_construct_entry_code();
+  return HEAP->js_construct_entry_code();
 }
 
 
diff --git a/deps/v8/src/full-codegen.cc b/deps/v8/src/full-codegen.cc
index 9592e0afa2..928da4a764 100644
--- a/deps/v8/src/full-codegen.cc
+++ b/deps/v8/src/full-codegen.cc
@@ -86,6 +86,10 @@ void BreakableStatementChecker::VisitModuleUrl(ModuleUrl* module) {
 }
 
 
+void BreakableStatementChecker::VisitModuleStatement(ModuleStatement* stmt) {
+}
+
+
 void BreakableStatementChecker::VisitBlock(Block* stmt) {
 }
 
@@ -466,9 +470,8 @@ void FullCodeGenerator::RecordTypeFeedbackCell(
 }
 
 
-void FullCodeGenerator::RecordStackCheck(BailoutId ast_id) {
-  // The pc offset does not need to be encoded and packed together with a
-  // state.
+void FullCodeGenerator::RecordBackEdge(BailoutId ast_id) {
+  // The pc offset does not need to be encoded and packed together with a state.
   ASSERT(masm_->pc_offset() > 0);
   BailoutEntry entry = { ast_id, static_cast<unsigned>(masm_->pc_offset()) };
   stack_checks_.Add(entry, zone());
@@ -582,16 +585,137 @@ void FullCodeGenerator::DoTest(const TestContext* context) {
 }
 
 
+void FullCodeGenerator::AllocateModules(ZoneList<Declaration*>* declarations) {
+  ASSERT(scope_->is_global_scope());
+
+  for (int i = 0; i < declarations->length(); i++) {
+    ModuleDeclaration* declaration = declarations->at(i)->AsModuleDeclaration();
+    if (declaration != NULL) {
+      ModuleLiteral* module = declaration->module()->AsModuleLiteral();
+      if (module != NULL) {
+        Comment cmnt(masm_, "[ Link nested modules");
+        Scope* scope = module->body()->scope();
+        Interface* interface = scope->interface();
+        ASSERT(interface->IsModule() && interface->IsFrozen());
+
+        interface->Allocate(scope->module_var()->index());
+
+        // Set up module context.
+        ASSERT(scope->interface()->Index() >= 0);
+        __ Push(Smi::FromInt(scope->interface()->Index()));
+        __ Push(scope->GetScopeInfo());
+        __ CallRuntime(Runtime::kPushModuleContext, 2);
+        StoreToFrameField(StandardFrameConstants::kContextOffset,
+                          context_register());
+
+        AllocateModules(scope->declarations());
+
+        // Pop module context.
+        LoadContextField(context_register(), Context::PREVIOUS_INDEX);
+        // Update local stack frame context field.
+        StoreToFrameField(StandardFrameConstants::kContextOffset,
+                          context_register());
+      }
+    }
+  }
+}
+
+
+// Modules have their own local scope, represented by their own context.
+// Module instance objects have an accessor for every export that forwards
+// access to the respective slot from the module's context. (Exports that are
+// modules themselves, however, are simple data properties.)
+//
+// All modules have a _hosting_ scope/context, which (currently) is the
+// (innermost) enclosing global scope. To deal with recursion, nested modules
+// are hosted by the same scope as global ones.
+//
+// For every (global or nested) module literal, the hosting context has an
+// internal slot that points directly to the respective module context. This
+// enables quick access to (statically resolved) module members by 2-dimensional
+// access through the hosting context. For example,
+//
+//   module A {
+//     let x;
+//     module B { let y; }
+//   }
+//   module C { let z; }
+//
+// allocates contexts as follows:
+//
+// [header| .A | .B | .C | A | C ]  (global)
+//           |    |    |
+//           |    |    +-- [header| z ]  (module)
+//           |    |
+//           |    +------- [header| y ]  (module)
+//           |
+//           +------------ [header| x | B ]  (module)
+//
+// Here, .A, .B, .C are the internal slots pointing to the hosted module
+// contexts, whereas A, B, C hold the actual instance objects (note that every
+// module context also points to the respective instance object through its
+// extension slot in the header).
+//
+// To deal with arbitrary recursion and aliases between modules,
+// they are created and initialized in several stages. Each stage applies to
+// all modules in the hosting global scope, including nested ones.
+//
+// 1. Allocate: for each module _literal_, allocate the module contexts and
+//    respective instance object and wire them up. This happens in the
+//    PushModuleContext runtime function, as generated by AllocateModules
+//    (invoked by VisitDeclarations in the hosting scope).
+//
+// 2. Bind: for each module _declaration_ (i.e. literals as well as aliases),
+//    assign the respective instance object to respective local variables. This
+//    happens in VisitModuleDeclaration, and uses the instance objects created
+//    in the previous stage.
+//    For each module _literal_, this phase also constructs a module descriptor
+//    for the next stage. This happens in VisitModuleLiteral.
+//
+// 3. Populate: invoke the DeclareModules runtime function to populate each
+//    _instance_ object with accessors for it exports. This is generated by
+//    DeclareModules (invoked by VisitDeclarations in the hosting scope again),
+//    and uses the descriptors generated in the previous stage.
+//
+// 4. Initialize: execute the module bodies (and other code) in sequence. This
+//    happens by the separate statements generated for module bodies. To reenter
+//    the module scopes properly, the parser inserted ModuleStatements.
+
 void FullCodeGenerator::VisitDeclarations(
     ZoneList<Declaration*>* declarations) {
+  Handle<FixedArray> saved_modules = modules_;
+  int saved_module_index = module_index_;
   ZoneList<Handle<Object> >* saved_globals = globals_;
   ZoneList<Handle<Object> > inner_globals(10, zone());
   globals_ = &inner_globals;
 
+  if (scope_->num_modules() != 0) {
+    // This is a scope hosting modules. Allocate a descriptor array to pass
+    // to the runtime for initialization.
+    Comment cmnt(masm_, "[ Allocate modules");
+    ASSERT(scope_->is_global_scope());
+    modules_ =
+        isolate()->factory()->NewFixedArray(scope_->num_modules(), TENURED);
+    module_index_ = 0;
+
+    // Generate code for allocating all modules, including nested ones.
+    // The allocated contexts are stored in internal variables in this scope.
+    AllocateModules(declarations);
+  }
+
   AstVisitor::VisitDeclarations(declarations);
+
+  if (scope_->num_modules() != 0) {
+    // Initialize modules from descriptor array.
+    ASSERT(module_index_ == modules_->length());
+    DeclareModules(modules_);
+    modules_ = saved_modules;
+    module_index_ = saved_module_index;
+  }
+
   if (!globals_->is_empty()) {
     // Invoke the platform-dependent code generator to do the actual
-    // declaration the global functions and variables.
+    // declaration of the global functions and variables.
     Handle<FixedArray> array =
        isolate()->factory()->NewFixedArray(globals_->length(), TENURED);
     for (int i = 0; i < globals_->length(); ++i)
@@ -604,19 +728,23 @@ void FullCodeGenerator::VisitDeclarations(
 
 
 void FullCodeGenerator::VisitModuleLiteral(ModuleLiteral* module) {
-  // Allocate a module context statically.
   Block* block = module->body();
   Scope* saved_scope = scope();
   scope_ = block->scope();
-  Interface* interface = module->interface();
-  Handle<JSModule> instance = interface->Instance();
+  Interface* interface = scope_->interface();
 
   Comment cmnt(masm_, "[ ModuleLiteral");
   SetStatementPosition(block);
 
+  ASSERT(!modules_.is_null());
+  ASSERT(module_index_ < modules_->length());
+  int index = module_index_++;
+
   // Set up module context.
-  __ Push(instance);
-  __ CallRuntime(Runtime::kPushModuleContext, 1);
+  ASSERT(interface->Index() >= 0);
+  __ Push(Smi::FromInt(interface->Index()));
+  __ Push(Smi::FromInt(0));
+  __ CallRuntime(Runtime::kPushModuleContext, 2);
   StoreToFrameField(StandardFrameConstants::kContextOffset, context_register());
 
   {
@@ -624,6 +752,11 @@ void FullCodeGenerator::VisitModuleLiteral(ModuleLiteral* module) {
     VisitDeclarations(scope_->declarations());
   }
 
+  // Populate the module description.
+  Handle<ModuleInfo> description =
+      ModuleInfo::Create(isolate(), interface, scope_);
+  modules_->set(index, *description);
+
   scope_ = saved_scope;
   // Pop module context.
   LoadContextField(context_register(), Context::PREVIOUS_INDEX);
@@ -644,8 +777,20 @@ void FullCodeGenerator::VisitModulePath(ModulePath* module) {
 }
 
 
-void FullCodeGenerator::VisitModuleUrl(ModuleUrl* decl) {
-  // TODO(rossberg)
+void FullCodeGenerator::VisitModuleUrl(ModuleUrl* module) {
+  // TODO(rossberg): dummy allocation for now.
+  Scope* scope = module->body()->scope();
+  Interface* interface = scope_->interface();
+
+  ASSERT(interface->IsModule() && interface->IsFrozen());
+  ASSERT(!modules_.is_null());
+  ASSERT(module_index_ < modules_->length());
+  interface->Allocate(scope->module_var()->index());
+  int index = module_index_++;
+
+  Handle<ModuleInfo> description =
+      ModuleInfo::Create(isolate(), interface, scope_);
+  modules_->set(index, *description);
 }
 
 
@@ -904,37 +1049,28 @@ void FullCodeGenerator::VisitBlock(Block* stmt) {
   // Push a block context when entering a block with block scoped variables.
   if (stmt->scope() != NULL) {
     scope_ = stmt->scope();
-    if (scope_->is_module_scope()) {
-      // If this block is a module body, then we have already allocated and
-      // initialized the declarations earlier. Just push the context.
-      ASSERT(!scope_->interface()->Instance().is_null());
-      __ Push(scope_->interface()->Instance());
-      __ CallRuntime(Runtime::kPushModuleContext, 1);
-      StoreToFrameField(
-          StandardFrameConstants::kContextOffset, context_register());
-    } else {
-      { Comment cmnt(masm_, "[ Extend block context");
-        Handle<ScopeInfo> scope_info = scope_->GetScopeInfo();
-        int heap_slots =
-            scope_info->ContextLength() - Context::MIN_CONTEXT_SLOTS;
-        __ Push(scope_info);
-        PushFunctionArgumentForContextAllocation();
-        if (heap_slots <= FastNewBlockContextStub::kMaximumSlots) {
-          FastNewBlockContextStub stub(heap_slots);
-          __ CallStub(&stub);
-        } else {
-          __ CallRuntime(Runtime::kPushBlockContext, 2);
-        }
-
-        // Replace the context stored in the frame.
-        StoreToFrameField(StandardFrameConstants::kContextOffset,
-                          context_register());
-      }
-      { Comment cmnt(masm_, "[ Declarations");
-        VisitDeclarations(scope_->declarations());
+    ASSERT(!scope_->is_module_scope());
+    { Comment cmnt(masm_, "[ Extend block context");
+      Handle<ScopeInfo> scope_info = scope_->GetScopeInfo();
+      int heap_slots = scope_info->ContextLength() - Context::MIN_CONTEXT_SLOTS;
+      __ Push(scope_info);
+      PushFunctionArgumentForContextAllocation();
+      if (heap_slots <= FastNewBlockContextStub::kMaximumSlots) {
+        FastNewBlockContextStub stub(heap_slots);
+        __ CallStub(&stub);
+      } else {
+        __ CallRuntime(Runtime::kPushBlockContext, 2);
       }
+
+      // Replace the context stored in the frame.
+      StoreToFrameField(StandardFrameConstants::kContextOffset,
+                        context_register());
+    }
+    { Comment cmnt(masm_, "[ Declarations");
+      VisitDeclarations(scope_->declarations());
     }
   }
+
   PrepareForBailoutForId(stmt->EntryId(), NO_REGISTERS);
   VisitStatements(stmt->statements());
   scope_ = saved_scope;
@@ -951,6 +1087,26 @@ void FullCodeGenerator::VisitBlock(Block* stmt) {
 }
 
 
+void FullCodeGenerator::VisitModuleStatement(ModuleStatement* stmt) {
+  Comment cmnt(masm_, "[ Module context");
+
+  __ Push(Smi::FromInt(stmt->proxy()->interface()->Index()));
+  __ Push(Smi::FromInt(0));
+  __ CallRuntime(Runtime::kPushModuleContext, 2);
+  StoreToFrameField(
+      StandardFrameConstants::kContextOffset, context_register());
+
+  Scope* saved_scope = scope_;
+  scope_ = stmt->body()->scope();
+  VisitStatements(stmt->body()->statements());
+  scope_ = saved_scope;
+  LoadContextField(context_register(), Context::PREVIOUS_INDEX);
+  // Update local stack frame context field.
+  StoreToFrameField(StandardFrameConstants::kContextOffset,
+                    context_register());
+}
+
+
 void FullCodeGenerator::VisitExpressionStatement(ExpressionStatement* stmt) {
   Comment cmnt(masm_, "[ ExpressionStatement");
   SetStatementPosition(stmt);
@@ -1111,7 +1267,7 @@ void FullCodeGenerator::VisitDoWhileStatement(DoWhileStatement* stmt) {
   // Check stack before looping.
   PrepareForBailoutForId(stmt->BackEdgeId(), NO_REGISTERS);
   __ bind(&stack_check);
-  EmitStackCheck(stmt, &body);
+  EmitBackEdgeBookkeeping(stmt, &body);
   __ jmp(&body);
 
   PrepareForBailoutForId(stmt->ExitId(), NO_REGISTERS);
@@ -1140,7 +1296,7 @@ void FullCodeGenerator::VisitWhileStatement(WhileStatement* stmt) {
   SetStatementPosition(stmt);
 
   // Check stack before looping.
-  EmitStackCheck(stmt, &body);
+  EmitBackEdgeBookkeeping(stmt, &body);
 
   __ bind(&test);
   VisitForControl(stmt->cond(),
@@ -1186,7 +1342,7 @@ void FullCodeGenerator::VisitForStatement(ForStatement* stmt) {
   SetStatementPosition(stmt);
 
   // Check stack before looping.
-  EmitStackCheck(stmt, &body);
+  EmitBackEdgeBookkeeping(stmt, &body);
 
   __ bind(&test);
   if (stmt->cond() != NULL) {
diff --git a/deps/v8/src/full-codegen.h b/deps/v8/src/full-codegen.h
index 89b51f9582..2f88184806 100644
--- a/deps/v8/src/full-codegen.h
+++ b/deps/v8/src/full-codegen.h
@@ -396,9 +396,15 @@ class FullCodeGenerator: public AstVisitor {
   void VisitInDuplicateContext(Expression* expr);
 
   void VisitDeclarations(ZoneList<Declaration*>* declarations);
+  void DeclareModules(Handle<FixedArray> descriptions);
   void DeclareGlobals(Handle<FixedArray> pairs);
   int DeclareGlobalsFlags();
 
+  // Generate code to allocate all (including nested) modules and contexts.
+  // Because of recursive linking and the presence of module alias declarations,
+  // this has to be a separate pass _before_ populating or executing any module.
+  void AllocateModules(ZoneList<Declaration*>* declarations);
+
   // Try to perform a comparison as a fast inlined literal compare if
   // the operands allow it.  Returns true if the compare operations
   // has been matched and all code generated; false otherwise.
@@ -442,14 +448,13 @@ class FullCodeGenerator: public AstVisitor {
   // neither a with nor a catch context.
   void EmitDebugCheckDeclarationContext(Variable* variable);
 
-  // Platform-specific code for checking the stack limit at the back edge of
-  // a loop.
   // This is meant to be called at loop back edges, |back_edge_target| is
   // the jump target of the back edge and is used to approximate the amount
   // of code inside the loop.
-  void EmitStackCheck(IterationStatement* stmt, Label* back_edge_target);
-  // Record the OSR AST id corresponding to a stack check in the code.
-  void RecordStackCheck(BailoutId osr_ast_id);
+  void EmitBackEdgeBookkeeping(IterationStatement* stmt,
+                               Label* back_edge_target);
+  // Record the OSR AST id corresponding to a back edge in the code.
+  void RecordBackEdge(BailoutId osr_ast_id);
   // Emit a table of stack check ids and pcs into the code stream.  Return
   // the offset of the start of the table.
   unsigned EmitStackCheckTable();
@@ -804,8 +809,12 @@ class FullCodeGenerator: public AstVisitor {
   NestedStatement* nesting_stack_;
   int loop_depth_;
   ZoneList<Handle<Object> >* globals_;
+  Handle<FixedArray> modules_;
+  int module_index_;
   const ExpressionContext* context_;
   ZoneList<BailoutEntry> bailout_entries_;
+  // TODO(svenpanne) Rename this to something like back_edges_ and rename
+  // related functions accordingly.
   ZoneList<BailoutEntry> stack_checks_;
   ZoneList<TypeFeedbackCellEntry> type_feedback_cells_;
   int ic_total_count_;
diff --git a/deps/v8/src/global-handles.cc b/deps/v8/src/global-handles.cc
index 9c0ad45179..392a1810be 100644
--- a/deps/v8/src/global-handles.cc
+++ b/deps/v8/src/global-handles.cc
@@ -69,6 +69,7 @@ class GlobalHandles::Node {
     class_id_ = v8::HeapProfiler::kPersistentHandleNoClassId;
     index_ = 0;
     independent_ = false;
+    partially_dependent_ = false;
     in_new_space_list_ = false;
     parameter_or_next_free_.next_free = NULL;
     callback_ = NULL;
@@ -89,6 +90,7 @@ class GlobalHandles::Node {
     object_ = object;
     class_id_ = v8::HeapProfiler::kPersistentHandleNoClassId;
     independent_ = false;
+    partially_dependent_ = false;
     state_  = NORMAL;
     parameter_or_next_free_.parameter = NULL;
     callback_ = NULL;
@@ -154,6 +156,15 @@ class GlobalHandles::Node {
   }
   bool is_independent() const { return independent_; }
 
+  void MarkPartiallyDependent(GlobalHandles* global_handles) {
+    ASSERT(state_ != FREE);
+    if (global_handles->isolate()->heap()->InNewSpace(object_)) {
+      partially_dependent_ = true;
+    }
+  }
+  bool is_partially_dependent() const { return partially_dependent_; }
+  void clear_partially_dependent() { partially_dependent_ = false; }
+
   // In-new-space-list flag accessors.
   void set_in_new_space_list(bool v) { in_new_space_list_ = v; }
   bool is_in_new_space_list() const { return in_new_space_list_; }
@@ -260,6 +271,7 @@ class GlobalHandles::Node {
   State state_ : 4;
 
   bool independent_ : 1;
+  bool partially_dependent_ : 1;
   bool in_new_space_list_ : 1;
 
   // Handle specific callback.
@@ -448,6 +460,16 @@ void GlobalHandles::MarkIndependent(Object** location) {
 }
 
 
+void GlobalHandles::MarkPartiallyDependent(Object** location) {
+  Node::FromLocation(location)->MarkPartiallyDependent(this);
+}
+
+
+bool GlobalHandles::IsIndependent(Object** location) {
+  return Node::FromLocation(location)->is_independent();
+}
+
+
 bool GlobalHandles::IsNearDeath(Object** location) {
   return Node::FromLocation(location)->IsNearDeath();
 }
@@ -462,6 +484,9 @@ void GlobalHandles::SetWrapperClassId(Object** location, uint16_t class_id) {
   Node::FromLocation(location)->set_wrapper_class_id(class_id);
 }
 
+uint16_t GlobalHandles::GetWrapperClassId(Object** location) {
+  return Node::FromLocation(location)->wrapper_class_id();
+}
 
 void GlobalHandles::IterateWeakRoots(ObjectVisitor* v) {
   for (NodeIterator it(this); !it.done(); it.Advance()) {
@@ -493,8 +518,9 @@ void GlobalHandles::IterateNewSpaceStrongAndDependentRoots(ObjectVisitor* v) {
   for (int i = 0; i < new_space_nodes_.length(); ++i) {
     Node* node = new_space_nodes_[i];
     if (node->IsStrongRetainer() ||
-        (node->IsWeakRetainer() && !node->is_independent())) {
-      v->VisitPointer(node->location());
+        (node->IsWeakRetainer() && !node->is_independent() &&
+         !node->is_partially_dependent())) {
+        v->VisitPointer(node->location());
     }
   }
 }
@@ -505,8 +531,8 @@ void GlobalHandles::IdentifyNewSpaceWeakIndependentHandles(
   for (int i = 0; i < new_space_nodes_.length(); ++i) {
     Node* node = new_space_nodes_[i];
     ASSERT(node->is_in_new_space_list());
-    if (node->is_independent() && node->IsWeak() &&
-        f(isolate_->heap(), node->location())) {
+    if ((node->is_independent() || node->is_partially_dependent()) &&
+        node->IsWeak() && f(isolate_->heap(), node->location())) {
       node->MarkPending();
     }
   }
@@ -517,15 +543,61 @@ void GlobalHandles::IterateNewSpaceWeakIndependentRoots(ObjectVisitor* v) {
   for (int i = 0; i < new_space_nodes_.length(); ++i) {
     Node* node = new_space_nodes_[i];
     ASSERT(node->is_in_new_space_list());
-    if (node->is_independent() && node->IsWeakRetainer()) {
+    if ((node->is_independent() || node->is_partially_dependent()) &&
+        node->IsWeakRetainer()) {
       v->VisitPointer(node->location());
     }
   }
 }
 
 
+bool GlobalHandles::IterateObjectGroups(ObjectVisitor* v,
+                                        WeakSlotCallbackWithHeap can_skip) {
+  int last = 0;
+  bool any_group_was_visited = false;
+  for (int i = 0; i < object_groups_.length(); i++) {
+    ObjectGroup* entry = object_groups_.at(i);
+    ASSERT(entry != NULL);
+
+    Object*** objects = entry->objects_;
+    bool group_should_be_visited = false;
+    for (size_t j = 0; j < entry->length_; j++) {
+      Object* object = *objects[j];
+      if (object->IsHeapObject()) {
+        if (!can_skip(isolate_->heap(), &object)) {
+          group_should_be_visited = true;
+          break;
+        }
+      }
+    }
+
+    if (!group_should_be_visited) {
+      object_groups_[last++] = entry;
+      continue;
+    }
+
+    // An object in the group requires visiting, so iterate over all
+    // objects in the group.
+    for (size_t j = 0; j < entry->length_; ++j) {
+      Object* object = *objects[j];
+      if (object->IsHeapObject()) {
+        v->VisitPointer(&object);
+        any_group_was_visited = true;
+      }
+    }
+
+    // Once the entire group has been iterated over, set the object
+    // group to NULL so it won't be processed again.
+    entry->Dispose();
+    object_groups_.at(i) = NULL;
+  }
+  object_groups_.Rewind(last);
+  return any_group_was_visited;
+}
+
+
 bool GlobalHandles::PostGarbageCollectionProcessing(
-    GarbageCollector collector) {
+    GarbageCollector collector, GCTracer* tracer) {
   // Process weak global handle callbacks. This must be done after the
   // GC is completely done, because the callbacks may invoke arbitrary
   // API functions.
@@ -539,7 +611,10 @@ bool GlobalHandles::PostGarbageCollectionProcessing(
       // Skip dependent handles. Their weak callbacks might expect to be
       // called between two global garbage collection callbacks which
       // are not called for minor collections.
-      if (!node->is_independent()) continue;
+      if (!node->is_independent() && !node->is_partially_dependent()) {
+        continue;
+      }
+      node->clear_partially_dependent();
       if (node->PostGarbageCollectionProcessing(isolate_, this)) {
         if (initial_post_gc_processing_count != post_gc_processing_count_) {
           // Weak callback triggered another GC and another round of
@@ -555,6 +630,7 @@ bool GlobalHandles::PostGarbageCollectionProcessing(
     }
   } else {
     for (NodeIterator it(this); !it.done(); it.Advance()) {
+      it.node()->clear_partially_dependent();
       if (it.node()->PostGarbageCollectionProcessing(isolate_, this)) {
         if (initial_post_gc_processing_count != post_gc_processing_count_) {
           // See the comment above.
@@ -571,10 +647,17 @@ bool GlobalHandles::PostGarbageCollectionProcessing(
   for (int i = 0; i < new_space_nodes_.length(); ++i) {
     Node* node = new_space_nodes_[i];
     ASSERT(node->is_in_new_space_list());
-    if (node->IsRetainer() && isolate_->heap()->InNewSpace(node->object())) {
-      new_space_nodes_[last++] = node;
+    if (node->IsRetainer()) {
+      if (isolate_->heap()->InNewSpace(node->object())) {
+        new_space_nodes_[last++] = node;
+        tracer->increment_nodes_copied_in_new_space();
+      } else {
+        node->set_in_new_space_list(false);
+        tracer->increment_nodes_promoted();
+      }
     } else {
       node->set_in_new_space_list(false);
+      tracer->increment_nodes_died_in_new_space();
     }
   }
   new_space_nodes_.Rewind(last);
@@ -602,7 +685,7 @@ void GlobalHandles::IterateAllRoots(ObjectVisitor* v) {
 
 void GlobalHandles::IterateAllRootsWithClassIds(ObjectVisitor* v) {
   for (NodeIterator it(this); !it.done(); it.Advance()) {
-    if (it.node()->has_wrapper_class_id() && it.node()->IsRetainer()) {
+    if (it.node()->IsRetainer() && it.node()->has_wrapper_class_id()) {
       v->VisitEmbedderReference(it.node()->location(),
                                 it.node()->wrapper_class_id());
     }
diff --git a/deps/v8/src/global-handles.h b/deps/v8/src/global-handles.h
index ddf5fe29c3..7808d16a03 100644
--- a/deps/v8/src/global-handles.h
+++ b/deps/v8/src/global-handles.h
@@ -131,6 +131,7 @@ class GlobalHandles {
                 WeakReferenceCallback callback);
 
   static void SetWrapperClassId(Object** location, uint16_t class_id);
+  static uint16_t GetWrapperClassId(Object** location);
 
   // Returns the current number of weak handles.
   int NumberOfWeakHandles() { return number_of_weak_handles_; }
@@ -154,6 +155,11 @@ class GlobalHandles {
   // Clear the weakness of a global handle.
   void MarkIndependent(Object** location);
 
+  // Mark the reference to this object externaly unreachable.
+  void MarkPartiallyDependent(Object** location);
+
+  static bool IsIndependent(Object** location);
+
   // Tells whether global handle is near death.
   static bool IsNearDeath(Object** location);
 
@@ -162,7 +168,8 @@ class GlobalHandles {
 
   // Process pending weak handles.
   // Returns true if next major GC is likely to collect more garbage.
-  bool PostGarbageCollectionProcessing(GarbageCollector collector);
+  bool PostGarbageCollectionProcessing(GarbageCollector collector,
+                                       GCTracer* tracer);
 
   // Iterates over all strong handles.
   void IterateStrongRoots(ObjectVisitor* v);
@@ -192,16 +199,22 @@ class GlobalHandles {
   // Iterates over strong and dependent handles. See the node above.
   void IterateNewSpaceStrongAndDependentRoots(ObjectVisitor* v);
 
-  // Finds weak independent handles satisfying the callback predicate
-  // and marks them as pending. See the note above.
+  // Finds weak independent or partially independent handles satisfying
+  // the callback predicate and marks them as pending. See the note above.
   void IdentifyNewSpaceWeakIndependentHandles(WeakSlotCallbackWithHeap f);
 
-  // Iterates over weak independent handles. See the note above.
+  // Iterates over weak independent or partially independent handles.
+  // See the note above.
   void IterateNewSpaceWeakIndependentRoots(ObjectVisitor* v);
 
+  // Iterate over objects in object groups that have at least one object
+  // which requires visiting. The callback has to return true if objects
+  // can be skipped and false otherwise.
+  bool IterateObjectGroups(ObjectVisitor* v, WeakSlotCallbackWithHeap can_skip);
+
   // Add an object group.
   // Should be only used in GC callback function before a collection.
-  // All groups are destroyed after a mark-compact collection.
+  // All groups are destroyed after a garbage collection.
   void AddObjectGroup(Object*** handles,
                       size_t length,
                       v8::RetainedObjectInfo* info);
diff --git a/deps/v8/src/globals.h b/deps/v8/src/globals.h
index 00ecd63d2a..babffbf659 100644
--- a/deps/v8/src/globals.h
+++ b/deps/v8/src/globals.h
@@ -136,21 +136,6 @@ namespace internal {
 #endif
 #endif
 
-// Define unaligned read for the target architectures supporting it.
-#if defined(V8_TARGET_ARCH_X64) || defined(V8_TARGET_ARCH_IA32)
-#define V8_TARGET_CAN_READ_UNALIGNED 1
-#elif V8_TARGET_ARCH_ARM
-// Some CPU-OS combinations allow unaligned access on ARM. We assume
-// that unaligned accesses are not allowed unless the build system
-// defines the CAN_USE_UNALIGNED_ACCESSES macro to be non-zero.
-#if CAN_USE_UNALIGNED_ACCESSES
-#define V8_TARGET_CAN_READ_UNALIGNED 1
-#endif
-#elif V8_TARGET_ARCH_MIPS
-#else
-#error Target architecture is not supported by v8
-#endif
-
 // Support for alternative bool type. This is only enabled if the code is
 // compiled with USE_MYBOOL defined. This catches some nasty type bugs.
 // For instance, 'bool b = "false";' results in b == true! This is a hidden
diff --git a/deps/v8/src/handles.cc b/deps/v8/src/handles.cc
index 6aa7a6a876..7397cc00be 100644
--- a/deps/v8/src/handles.cc
+++ b/deps/v8/src/handles.cc
@@ -229,12 +229,12 @@ Handle<Object> SetPrototype(Handle<JSFunction> function,
 }
 
 
-Handle<Object> SetProperty(Handle<Object> object,
+Handle<Object> SetProperty(Isolate* isolate,
+                           Handle<Object> object,
                            Handle<Object> key,
                            Handle<Object> value,
                            PropertyAttributes attributes,
                            StrictModeFlag strict_mode) {
-  Isolate* isolate = Isolate::Current();
   CALL_HEAP_FUNCTION(
       isolate,
       Runtime::SetObjectProperty(
@@ -593,6 +593,25 @@ v8::Handle<v8::Array> GetKeysForIndexedInterceptor(Handle<JSReceiver> receiver,
 }
 
 
+Handle<Object> GetScriptNameOrSourceURL(Handle<Script> script) {
+  Isolate* isolate = script->GetIsolate();
+  Handle<String> name_or_source_url_key =
+      isolate->factory()->LookupAsciiSymbol("nameOrSourceURL");
+  Handle<JSValue> script_wrapper = GetScriptWrapper(script);
+  Handle<Object> property = GetProperty(script_wrapper,
+                                        name_or_source_url_key);
+  ASSERT(property->IsJSFunction());
+  Handle<JSFunction> method = Handle<JSFunction>::cast(property);
+  bool caught_exception;
+  Handle<Object> result = Execution::TryCall(method, script_wrapper, 0,
+                                             NULL, &caught_exception);
+  if (caught_exception) {
+    result = isolate->factory()->undefined_value();
+  }
+  return result;
+}
+
+
 static bool ContainsOnlyValidKeys(Handle<FixedArray> array) {
   int len = array->length();
   for (int i = 0; i < len; i++) {
@@ -705,24 +724,46 @@ Handle<JSArray> GetKeysFor(Handle<JSReceiver> object, bool* threw) {
 }
 
 
+Handle<FixedArray> ReduceFixedArrayTo(Handle<FixedArray> array, int length) {
+  ASSERT(array->length() >= length);
+  if (array->length() == length) return array;
+
+  Handle<FixedArray> new_array =
+      array->GetIsolate()->factory()->NewFixedArray(length);
+  for (int i = 0; i < length; ++i) new_array->set(i, array->get(i));
+  return new_array;
+}
+
+
 Handle<FixedArray> GetEnumPropertyKeys(Handle<JSObject> object,
                                        bool cache_result) {
   Isolate* isolate = object->GetIsolate();
   if (object->HasFastProperties()) {
     if (object->map()->instance_descriptors()->HasEnumCache()) {
       int own_property_count = object->map()->EnumLength();
-
-      // Mark that we have an enum cache if we are allowed to cache it.
-      if (cache_result && own_property_count == Map::kInvalidEnumCache) {
-        int num_enum = object->map()->NumberOfDescribedProperties(DONT_ENUM);
-        object->map()->SetEnumLength(num_enum);
+      // If we have an enum cache, but the enum length of the given map is set
+      // to kInvalidEnumCache, this means that the map itself has never used the
+      // present enum cache. The first step to using the cache is to set the
+      // enum length of the map by counting the number of own descriptors that
+      // are not DONT_ENUM.
+      if (own_property_count == Map::kInvalidEnumCache) {
+        own_property_count = object->map()->NumberOfDescribedProperties(
+            OWN_DESCRIPTORS, DONT_ENUM);
+
+        if (cache_result) object->map()->SetEnumLength(own_property_count);
       }
 
       DescriptorArray* desc = object->map()->instance_descriptors();
-      Handle<FixedArray> keys(FixedArray::cast(desc->GetEnumCache()), isolate);
-
-      isolate->counters()->enum_cache_hits()->Increment();
-      return keys;
+      Handle<FixedArray> keys(desc->GetEnumCache(), isolate);
+
+      // In case the number of properties required in the enum are actually
+      // present, we can reuse the enum cache. Otherwise, this means that the
+      // enum cache was generated for a previous (smaller) version of the
+      // Descriptor Array. In that case we regenerate the enum cache.
+      if (own_property_count <= keys->length()) {
+        isolate->counters()->enum_cache_hits()->Increment();
+        return ReduceFixedArrayTo(keys, own_property_count);
+      }
     }
 
     Handle<Map> map(object->map());
@@ -734,8 +775,7 @@ Handle<FixedArray> GetEnumPropertyKeys(Handle<JSObject> object,
     }
 
     isolate->counters()->enum_cache_misses()->Increment();
-
-    int num_enum = map->NumberOfDescribedProperties(DONT_ENUM);
+    int num_enum = map->NumberOfDescribedProperties(ALL_DESCRIPTORS, DONT_ENUM);
 
     Handle<FixedArray> storage = isolate->factory()->NewFixedArray(num_enum);
     Handle<FixedArray> indices = isolate->factory()->NewFixedArray(num_enum);
@@ -743,10 +783,14 @@ Handle<FixedArray> GetEnumPropertyKeys(Handle<JSObject> object,
     Handle<DescriptorArray> descs =
         Handle<DescriptorArray>(object->map()->instance_descriptors(), isolate);
 
+    int real_size = map->NumberOfOwnDescriptors();
+    int enum_size = 0;
     int index = 0;
+
     for (int i = 0; i < descs->number_of_descriptors(); i++) {
       PropertyDetails details = descs->GetDetails(i);
       if (!details.IsDontEnum()) {
+        if (i < real_size) ++enum_size;
         storage->set(index, descs->GetKey(i));
         if (!indices.is_null()) {
           if (details.type() != FIELD) {
@@ -773,9 +817,10 @@ Handle<FixedArray> GetEnumPropertyKeys(Handle<JSObject> object,
                        indices.is_null() ? Object::cast(Smi::FromInt(0))
                                          : Object::cast(*indices));
     if (cache_result) {
-      object->map()->SetEnumLength(index);
+      object->map()->SetEnumLength(enum_size);
     }
-    return storage;
+
+    return ReduceFixedArrayTo(storage, enum_size);
   } else {
     Handle<StringDictionary> dictionary(object->property_dictionary());
 
@@ -870,7 +915,7 @@ int Utf8LengthHelper(String* input,
   int total = 0;
   bool dummy;
   while (true) {
-    if (input->IsAsciiRepresentation()) {
+    if (input->IsOneByteRepresentation()) {
       *starts_with_surrogate = false;
       return total + to - from;
     }
@@ -903,14 +948,14 @@ int Utf8LengthHelper(String* input,
         } else {
           if (first_length > from) {
             // Left hand side is shorter.
-            if (first->IsAsciiRepresentation()) {
+            if (first->IsOneByteRepresentation()) {
               total += first_length - from;
               *starts_with_surrogate = false;
               starts_with_surrogate = &dummy;
               input = second;
               from = 0;
               to -= first_length;
-            } else if (second->IsAsciiRepresentation()) {
+            } else if (second->IsOneByteRepresentation()) {
               followed_by_surrogate = false;
               total += to - first_length;
               input = first;
diff --git a/deps/v8/src/handles.h b/deps/v8/src/handles.h
index b35693e95f..032fbe4815 100644
--- a/deps/v8/src/handles.h
+++ b/deps/v8/src/handles.h
@@ -95,6 +95,13 @@ class Handle {
 };
 
 
+// Convenience wrapper.
+template<class T>
+inline Handle<T> handle(T* t, Isolate* isolate) {
+  return Handle<T>(t, isolate);
+}
+
+
 class DeferredHandles;
 class HandleScopeImplementer;
 
@@ -209,7 +216,8 @@ Handle<String> FlattenGetString(Handle<String> str);
 
 int Utf8Length(Handle<String> str);
 
-Handle<Object> SetProperty(Handle<Object> object,
+Handle<Object> SetProperty(Isolate* isolate,
+                           Handle<Object> object,
                            Handle<Object> key,
                            Handle<Object> value,
                            PropertyAttributes attributes,
@@ -260,6 +268,7 @@ int GetScriptLineNumber(Handle<Script> script, int code_position);
 // The safe version does not make heap allocations but may work much slower.
 int GetScriptLineNumberSafe(Handle<Script> script, int code_position);
 int GetScriptColumnNumber(Handle<Script> script, int code_position);
+Handle<Object> GetScriptNameOrSourceURL(Handle<Script> script);
 
 // Computes the enumerable keys from interceptors. Used for debug mirrors and
 // by GetKeysInFixedArrayFor below.
@@ -276,6 +285,7 @@ Handle<FixedArray> GetKeysInFixedArrayFor(Handle<JSReceiver> object,
                                           KeyCollectionType type,
                                           bool* threw);
 Handle<JSArray> GetKeysFor(Handle<JSReceiver> object, bool* threw);
+Handle<FixedArray> ReduceFixedArrayTo(Handle<FixedArray> array, int length);
 Handle<FixedArray> GetEnumPropertyKeys(Handle<JSObject> object,
                                        bool cache_result);
 
diff --git a/deps/v8/src/heap-inl.h b/deps/v8/src/heap-inl.h
index 4a827fef17..de47c94a8a 100644
--- a/deps/v8/src/heap-inl.h
+++ b/deps/v8/src/heap-inl.h
@@ -85,13 +85,16 @@ void PromotionQueue::ActivateGuardIfOnTheSamePage() {
 MaybeObject* Heap::AllocateStringFromUtf8(Vector<const char> str,
                                           PretenureFlag pretenure) {
   // Check for ASCII first since this is the common case.
-  if (String::IsAscii(str.start(), str.length())) {
+  const char* start = str.start();
+  int length = str.length();
+  int non_ascii_start = String::NonAsciiStart(start, length);
+  if (non_ascii_start >= length) {
     // If the string is ASCII, we do not need to convert the characters
     // since UTF8 is backwards compatible with ASCII.
-    return AllocateStringFromAscii(str, pretenure);
+    return AllocateStringFromOneByte(str, pretenure);
   }
   // Non-ASCII and we need to decode.
-  return AllocateStringFromUtf8Slow(str, pretenure);
+  return AllocateStringFromUtf8Slow(str, non_ascii_start, pretenure);
 }
 
 
@@ -106,12 +109,12 @@ MaybeObject* Heap::AllocateSymbol(Vector<const char> str,
 
 MaybeObject* Heap::AllocateAsciiSymbol(Vector<const char> str,
                                        uint32_t hash_field) {
-  if (str.length() > SeqAsciiString::kMaxLength) {
+  if (str.length() > SeqOneByteString::kMaxLength) {
     return Failure::OutOfMemoryException();
   }
   // Compute map and object size.
   Map* map = ascii_symbol_map();
-  int size = SeqAsciiString::SizeFor(str.length());
+  int size = SeqOneByteString::SizeFor(str.length());
 
   // Allocate string.
   Object* result;
@@ -131,7 +134,7 @@ MaybeObject* Heap::AllocateAsciiSymbol(Vector<const char> str,
   ASSERT_EQ(size, answer->Size());
 
   // Fill in the characters.
-  memcpy(answer->address() + SeqAsciiString::kHeaderSize,
+  memcpy(answer->address() + SeqOneByteString::kHeaderSize,
          str.start(), str.length());
 
   return answer;
@@ -267,13 +270,6 @@ MaybeObject* Heap::AllocateRawMap() {
 #endif
   MaybeObject* result = map_space_->AllocateRaw(Map::kSize);
   if (result->IsFailure()) old_gen_exhausted_ = true;
-#ifdef DEBUG
-  if (!result->IsFailure()) {
-    // Maps have their own alignment.
-    CHECK((reinterpret_cast<intptr_t>(result) & kMapAlignmentMask) ==
-          static_cast<intptr_t>(kHeapObjectTag));
-  }
-#endif
   return result;
 }
 
@@ -464,7 +460,7 @@ intptr_t Heap::AdjustAmountOfExternalAllocatedMemory(
     intptr_t change_in_bytes) {
   ASSERT(HasBeenSetUp());
   intptr_t amount = amount_of_external_allocated_memory_ + change_in_bytes;
-  if (change_in_bytes >= 0) {
+  if (change_in_bytes > 0) {
     // Avoid overflow.
     if (amount > amount_of_external_allocated_memory_) {
       amount_of_external_allocated_memory_ = amount;
@@ -611,7 +607,7 @@ void ExternalStringTable::Verify() {
     Object* obj = Object::cast(new_space_strings_[i]);
     // TODO(yangguo): check that the object is indeed an external string.
     ASSERT(heap_->InNewSpace(obj));
-    ASSERT(obj != HEAP->raw_unchecked_the_hole_value());
+    ASSERT(obj != HEAP->the_hole_value());
     if (obj->IsExternalAsciiString()) {
       ExternalAsciiString* string = ExternalAsciiString::cast(obj);
       ASSERT(String::IsAscii(string->GetChars(), string->length()));
@@ -621,7 +617,7 @@ void ExternalStringTable::Verify() {
     Object* obj = Object::cast(old_space_strings_[i]);
     // TODO(yangguo): check that the object is indeed an external string.
     ASSERT(!heap_->InNewSpace(obj));
-    ASSERT(obj != HEAP->raw_unchecked_the_hole_value());
+    ASSERT(obj != HEAP->the_hole_value());
     if (obj->IsExternalAsciiString()) {
       ExternalAsciiString* string = ExternalAsciiString::cast(obj);
       ASSERT(String::IsAscii(string->GetChars(), string->length()));
@@ -640,9 +636,11 @@ void ExternalStringTable::AddOldString(String* string) {
 
 void ExternalStringTable::ShrinkNewStrings(int position) {
   new_space_strings_.Rewind(position);
+#ifdef VERIFY_HEAP
   if (FLAG_verify_heap) {
     Verify();
   }
+#endif
 }
 
 
@@ -741,28 +739,15 @@ AlwaysAllocateScope::~AlwaysAllocateScope() {
 }
 
 
-LinearAllocationScope::LinearAllocationScope() {
-  HEAP->linear_allocation_scope_depth_++;
-}
-
-
-LinearAllocationScope::~LinearAllocationScope() {
-  HEAP->linear_allocation_scope_depth_--;
-  ASSERT(HEAP->linear_allocation_scope_depth_ >= 0);
-}
-
-
-#ifdef DEBUG
 void VerifyPointersVisitor::VisitPointers(Object** start, Object** end) {
   for (Object** current = start; current < end; current++) {
     if ((*current)->IsHeapObject()) {
       HeapObject* object = HeapObject::cast(*current);
-      ASSERT(HEAP->Contains(object));
-      ASSERT(object->map()->IsMap());
+      CHECK(HEAP->Contains(object));
+      CHECK(object->map()->IsMap());
     }
   }
 }
-#endif
 
 
 double GCTracer::SizeOfHeapObjects() {
diff --git a/deps/v8/src/heap-profiler.cc b/deps/v8/src/heap-profiler.cc
index 301b09993e..45a93f9e14 100644
--- a/deps/v8/src/heap-profiler.cc
+++ b/deps/v8/src/heap-profiler.cc
@@ -65,23 +65,29 @@ void HeapProfiler::TearDown() {
 }
 
 
-HeapSnapshot* HeapProfiler::TakeSnapshot(const char* name,
-                                         int type,
-                                         v8::ActivityControl* control) {
+HeapSnapshot* HeapProfiler::TakeSnapshot(
+    const char* name,
+    int type,
+    v8::ActivityControl* control,
+    v8::HeapProfiler::ObjectNameResolver* resolver) {
   ASSERT(Isolate::Current()->heap_profiler() != NULL);
   return Isolate::Current()->heap_profiler()->TakeSnapshotImpl(name,
                                                                type,
-                                                               control);
+                                                               control,
+                                                               resolver);
 }
 
 
-HeapSnapshot* HeapProfiler::TakeSnapshot(String* name,
-                                         int type,
-                                         v8::ActivityControl* control) {
+HeapSnapshot* HeapProfiler::TakeSnapshot(
+    String* name,
+    int type,
+    v8::ActivityControl* control,
+    v8::HeapProfiler::ObjectNameResolver* resolver) {
   ASSERT(Isolate::Current()->heap_profiler() != NULL);
   return Isolate::Current()->heap_profiler()->TakeSnapshotImpl(name,
                                                                type,
-                                                               control);
+                                                               control,
+                                                               resolver);
 }
 
 
@@ -122,16 +128,18 @@ v8::RetainedObjectInfo* HeapProfiler::ExecuteWrapperClassCallback(
 }
 
 
-HeapSnapshot* HeapProfiler::TakeSnapshotImpl(const char* name,
-                                             int type,
-                                             v8::ActivityControl* control) {
+HeapSnapshot* HeapProfiler::TakeSnapshotImpl(
+    const char* name,
+    int type,
+    v8::ActivityControl* control,
+    v8::HeapProfiler::ObjectNameResolver* resolver) {
   HeapSnapshot::Type s_type = static_cast<HeapSnapshot::Type>(type);
   HeapSnapshot* result =
       snapshots_->NewSnapshot(s_type, name, next_snapshot_uid_++);
   bool generation_completed = true;
   switch (s_type) {
     case HeapSnapshot::kFull: {
-      HeapSnapshotGenerator generator(result, control);
+      HeapSnapshotGenerator generator(result, control, resolver);
       generation_completed = generator.GenerateSnapshot();
       break;
     }
@@ -147,10 +155,13 @@ HeapSnapshot* HeapProfiler::TakeSnapshotImpl(const char* name,
 }
 
 
-HeapSnapshot* HeapProfiler::TakeSnapshotImpl(String* name,
-                                             int type,
-                                             v8::ActivityControl* control) {
-  return TakeSnapshotImpl(snapshots_->names()->GetName(name), type, control);
+HeapSnapshot* HeapProfiler::TakeSnapshotImpl(
+    String* name,
+    int type,
+    v8::ActivityControl* control,
+    v8::HeapProfiler::ObjectNameResolver* resolver) {
+  return TakeSnapshotImpl(snapshots_->names()->GetName(name), type, control,
+                          resolver);
 }
 
 void HeapProfiler::StartHeapObjectsTrackingImpl() {
diff --git a/deps/v8/src/heap-profiler.h b/deps/v8/src/heap-profiler.h
index 346177b8ba..9d3ba6f111 100644
--- a/deps/v8/src/heap-profiler.h
+++ b/deps/v8/src/heap-profiler.h
@@ -51,12 +51,16 @@ class HeapProfiler {
 
   static size_t GetMemorySizeUsedByProfiler();
 
-  static HeapSnapshot* TakeSnapshot(const char* name,
-                                    int type,
-                                    v8::ActivityControl* control);
-  static HeapSnapshot* TakeSnapshot(String* name,
-                                    int type,
-                                    v8::ActivityControl* control);
+  static HeapSnapshot* TakeSnapshot(
+      const char* name,
+      int type,
+      v8::ActivityControl* control,
+      v8::HeapProfiler::ObjectNameResolver* resolver);
+  static HeapSnapshot* TakeSnapshot(
+      String* name,
+      int type,
+      v8::ActivityControl* control,
+      v8::HeapProfiler::ObjectNameResolver* resolver);
 
   static void StartHeapObjectsTracking();
   static void StopHeapObjectsTracking();
@@ -81,12 +85,16 @@ class HeapProfiler {
  private:
   HeapProfiler();
   ~HeapProfiler();
-  HeapSnapshot* TakeSnapshotImpl(const char* name,
-                                 int type,
-                                 v8::ActivityControl* control);
-  HeapSnapshot* TakeSnapshotImpl(String* name,
-                                 int type,
-                                 v8::ActivityControl* control);
+  HeapSnapshot* TakeSnapshotImpl(
+      const char* name,
+      int type,
+      v8::ActivityControl* control,
+      v8::HeapProfiler::ObjectNameResolver* resolver);
+  HeapSnapshot* TakeSnapshotImpl(
+      String* name,
+      int type,
+      v8::ActivityControl* control,
+      v8::HeapProfiler::ObjectNameResolver* resolver);
   void ResetSnapshots();
 
   void StartHeapObjectsTrackingImpl();
diff --git a/deps/v8/src/heap.cc b/deps/v8/src/heap.cc
index 9ba769212d..746c9b6d6f 100644
--- a/deps/v8/src/heap.cc
+++ b/deps/v8/src/heap.cc
@@ -48,6 +48,7 @@
 #include "snapshot.h"
 #include "store-buffer.h"
 #include "v8threads.h"
+#include "v8utils.h"
 #include "vm-state-inl.h"
 #if V8_TARGET_ARCH_ARM && !V8_INTERPRETED_REGEXP
 #include "regexp-macro-assembler.h"
@@ -97,6 +98,7 @@ Heap::Heap()
       linear_allocation_scope_depth_(0),
       contexts_disposed_(0),
       global_ic_age_(0),
+      flush_monomorphic_ics_(false),
       scan_on_scavenge_pages_(0),
       new_space_(this),
       old_pointer_space_(NULL),
@@ -115,7 +117,6 @@ Heap::Heap()
       allocation_allowed_(true),
       allocation_timeout_(0),
       disallow_allocation_failure_(false),
-      debug_utils_(NULL),
 #endif  // DEBUG
       new_space_high_promotion_mode_active_(false),
       old_gen_promotion_limit_(kMinimumPromotionLimit),
@@ -135,6 +136,7 @@ Heap::Heap()
       tracer_(NULL),
       young_survivors_after_last_gc_(0),
       high_survival_rate_period_length_(0),
+      low_survival_rate_period_length_(0),
       survival_rate_(0),
       previous_survival_rate_trend_(Heap::STABLE),
       survival_rate_trend_(Heap::STABLE),
@@ -210,6 +212,20 @@ intptr_t Heap::CommittedMemory() {
       lo_space_->Size();
 }
 
+
+size_t Heap::CommittedPhysicalMemory() {
+  if (!HasBeenSetUp()) return 0;
+
+  return new_space_.CommittedPhysicalMemory() +
+      old_pointer_space_->CommittedPhysicalMemory() +
+      old_data_space_->CommittedPhysicalMemory() +
+      code_space_->CommittedPhysicalMemory() +
+      map_space_->CommittedPhysicalMemory() +
+      cell_space_->CommittedPhysicalMemory() +
+      lo_space_->CommittedPhysicalMemory();
+}
+
+
 intptr_t Heap::CommittedMemoryExecutable() {
   if (!HasBeenSetUp()) return 0;
 
@@ -370,6 +386,12 @@ void Heap::PrintShortHeapStatistics() {
            lo_space_->SizeOfObjects() / KB,
            lo_space_->Available() / KB,
            lo_space_->CommittedMemory() / KB);
+  PrintPID("All spaces,         used: %6" V8_PTR_PREFIX "d KB"
+               ", available: %6" V8_PTR_PREFIX "d KB"
+               ", committed: %6" V8_PTR_PREFIX "d KB\n",
+           this->SizeOfObjects() / KB,
+           this->Available() / KB,
+           this->CommittedMemory() / KB);
   PrintPID("Total time spent in GC  : %d ms\n", total_gc_time_ms_);
 }
 
@@ -397,18 +419,23 @@ void Heap::GarbageCollectionPrologue() {
   ClearJSFunctionResultCaches();
   gc_count_++;
   unflattened_strings_length_ = 0;
-#ifdef DEBUG
-  ASSERT(allocation_allowed_ && gc_state_ == NOT_IN_GC);
-  allow_allocation(false);
 
+  if (FLAG_flush_code && FLAG_flush_code_incrementally) {
+    mark_compact_collector()->EnableCodeFlushing(true);
+  }
+
+#ifdef VERIFY_HEAP
   if (FLAG_verify_heap) {
     Verify();
   }
+#endif
+
+#ifdef DEBUG
+  ASSERT(allocation_allowed_ && gc_state_ == NOT_IN_GC);
+  allow_allocation(false);
 
   if (FLAG_gc_verbose) Print();
-#endif  // DEBUG
 
-#if defined(DEBUG)
   ReportStatisticsBeforeGC();
 #endif  // DEBUG
 
@@ -416,6 +443,7 @@ void Heap::GarbageCollectionPrologue() {
   store_buffer()->GCPrologue();
 }
 
+
 intptr_t Heap::SizeOfObjects() {
   intptr_t total = 0;
   AllSpaces spaces;
@@ -425,17 +453,34 @@ intptr_t Heap::SizeOfObjects() {
   return total;
 }
 
+
+void Heap::RepairFreeListsAfterBoot() {
+  PagedSpaces spaces;
+  for (PagedSpace* space = spaces.next();
+       space != NULL;
+       space = spaces.next()) {
+    space->RepairFreeListsAfterBoot();
+  }
+}
+
+
 void Heap::GarbageCollectionEpilogue() {
   store_buffer()->GCEpilogue();
   LiveObjectList::GCEpilogue();
-#ifdef DEBUG
-  allow_allocation(true);
-  ZapFromSpace();
 
+  // In release mode, we only zap the from space under heap verification.
+  if (Heap::ShouldZapGarbage()) {
+    ZapFromSpace();
+  }
+
+#ifdef VERIFY_HEAP
   if (FLAG_verify_heap) {
     Verify();
   }
+#endif
 
+#ifdef DEBUG
+  allow_allocation(true);
   if (FLAG_print_global_handles) isolate_->global_handles()->Print();
   if (FLAG_print_handles) PrintHandles();
   if (FLAG_gc_verbose) Print();
@@ -570,7 +615,7 @@ bool Heap::CollectGarbage(AllocationSpace space,
   }
 
   if (collector == MARK_COMPACTOR &&
-      !mark_compact_collector()->abort_incremental_marking_ &&
+      !mark_compact_collector()->abort_incremental_marking() &&
       !incremental_marking()->IsStopped() &&
       !incremental_marking()->should_hurry() &&
       FLAG_incremental_marking_steps) {
@@ -598,22 +643,24 @@ bool Heap::CollectGarbage(AllocationSpace space,
     // Tell the tracer which collector we've selected.
     tracer.set_collector(collector);
 
-    HistogramTimer* rate = (collector == SCAVENGER)
-        ? isolate_->counters()->gc_scavenger()
-        : isolate_->counters()->gc_compactor();
-    rate->Start();
-    next_gc_likely_to_collect_more =
-        PerformGarbageCollection(collector, &tracer);
-    rate->Stop();
+    {
+      HistogramTimerScope histogram_timer_scope(
+          (collector == SCAVENGER) ? isolate_->counters()->gc_scavenger()
+                                   : isolate_->counters()->gc_compactor());
+      next_gc_likely_to_collect_more =
+          PerformGarbageCollection(collector, &tracer);
+    }
 
     GarbageCollectionEpilogue();
   }
 
-  ASSERT(collector == SCAVENGER || incremental_marking()->IsStopped());
-  if (incremental_marking()->IsStopped()) {
-    if (incremental_marking()->WorthActivating() && NextGCIsLikelyToBeFull()) {
-      incremental_marking()->Start();
-    }
+  // Start incremental marking for the next cycle. The heap snapshot
+  // generator needs incremental marking to stay off after it aborted.
+  if (!mark_compact_collector()->abort_incremental_marking() &&
+      incremental_marking()->IsStopped() &&
+      incremental_marking()->WorthActivating() &&
+      NextGCIsLikelyToBeFull()) {
+    incremental_marking()->Start();
   }
 
   return next_gc_likely_to_collect_more;
@@ -630,7 +677,7 @@ void Heap::PerformScavenge() {
 }
 
 
-#ifdef DEBUG
+#ifdef VERIFY_HEAP
 // Helper class for verifying the symbol table.
 class SymbolTableVerifier : public ObjectVisitor {
  public:
@@ -639,20 +686,18 @@ class SymbolTableVerifier : public ObjectVisitor {
     for (Object** p = start; p < end; p++) {
       if ((*p)->IsHeapObject()) {
         // Check that the symbol is actually a symbol.
-        ASSERT((*p)->IsTheHole() || (*p)->IsUndefined() || (*p)->IsSymbol());
+        CHECK((*p)->IsTheHole() || (*p)->IsUndefined() || (*p)->IsSymbol());
       }
     }
   }
 };
-#endif  // DEBUG
 
 
 static void VerifySymbolTable() {
-#ifdef DEBUG
   SymbolTableVerifier verifier;
   HEAP->symbol_table()->IterateElements(&verifier);
-#endif  // DEBUG
 }
+#endif  // VERIFY_HEAP
 
 
 static bool AbortIncrementalMarkingAndCollectGarbage(
@@ -667,67 +712,42 @@ static bool AbortIncrementalMarkingAndCollectGarbage(
 
 
 void Heap::ReserveSpace(
-    int new_space_size,
-    int pointer_space_size,
-    int data_space_size,
-    int code_space_size,
-    int map_space_size,
-    int cell_space_size,
-    int large_object_size) {
-  NewSpace* new_space = Heap::new_space();
-  PagedSpace* old_pointer_space = Heap::old_pointer_space();
-  PagedSpace* old_data_space = Heap::old_data_space();
-  PagedSpace* code_space = Heap::code_space();
-  PagedSpace* map_space = Heap::map_space();
-  PagedSpace* cell_space = Heap::cell_space();
-  LargeObjectSpace* lo_space = Heap::lo_space();
+    int *sizes,
+    Address *locations_out) {
   bool gc_performed = true;
   int counter = 0;
   static const int kThreshold = 20;
   while (gc_performed && counter++ < kThreshold) {
     gc_performed = false;
-    if (!new_space->ReserveSpace(new_space_size)) {
-      Heap::CollectGarbage(NEW_SPACE,
-                           "failed to reserve space in the new space");
-      gc_performed = true;
-    }
-    if (!old_pointer_space->ReserveSpace(pointer_space_size)) {
-      AbortIncrementalMarkingAndCollectGarbage(this, OLD_POINTER_SPACE,
-          "failed to reserve space in the old pointer space");
-      gc_performed = true;
-    }
-    if (!(old_data_space->ReserveSpace(data_space_size))) {
-      AbortIncrementalMarkingAndCollectGarbage(this, OLD_DATA_SPACE,
-          "failed to reserve space in the old data space");
-      gc_performed = true;
-    }
-    if (!(code_space->ReserveSpace(code_space_size))) {
-      AbortIncrementalMarkingAndCollectGarbage(this, CODE_SPACE,
-          "failed to reserve space in the code space");
-      gc_performed = true;
-    }
-    if (!(map_space->ReserveSpace(map_space_size))) {
-      AbortIncrementalMarkingAndCollectGarbage(this, MAP_SPACE,
-          "failed to reserve space in the map space");
-      gc_performed = true;
-    }
-    if (!(cell_space->ReserveSpace(cell_space_size))) {
-      AbortIncrementalMarkingAndCollectGarbage(this, CELL_SPACE,
-          "failed to reserve space in the cell space");
-      gc_performed = true;
-    }
-    // We add a slack-factor of 2 in order to have space for a series of
-    // large-object allocations that are only just larger than the page size.
-    large_object_size *= 2;
-    // The ReserveSpace method on the large object space checks how much
-    // we can expand the old generation.  This includes expansion caused by
-    // allocation in the other spaces.
-    large_object_size += cell_space_size + map_space_size + code_space_size +
-        data_space_size + pointer_space_size;
-    if (!(lo_space->ReserveSpace(large_object_size))) {
-      AbortIncrementalMarkingAndCollectGarbage(this, LO_SPACE,
-          "failed to reserve space in the large object space");
-      gc_performed = true;
+    ASSERT(NEW_SPACE == FIRST_PAGED_SPACE - 1);
+    for (int space = NEW_SPACE; space <= LAST_PAGED_SPACE; space++) {
+      if (sizes[space] != 0) {
+        MaybeObject* allocation;
+        if (space == NEW_SPACE) {
+          allocation = new_space()->AllocateRaw(sizes[space]);
+        } else {
+          allocation = paged_space(space)->AllocateRaw(sizes[space]);
+        }
+        FreeListNode* node;
+        if (!allocation->To<FreeListNode>(&node)) {
+          if (space == NEW_SPACE) {
+            Heap::CollectGarbage(NEW_SPACE,
+                                 "failed to reserve space in the new space");
+          } else {
+            AbortIncrementalMarkingAndCollectGarbage(
+                this,
+                static_cast<AllocationSpace>(space),
+                "failed to reserve space in paged space");
+          }
+          gc_performed = true;
+          break;
+        } else {
+          // Mark with a free list node, in case we have a GC before
+          // deserializing.
+          node->set_size(this, sizes[space]);
+          locations_out[space] = node->address();
+        }
+      }
     }
   }
 
@@ -834,9 +854,12 @@ bool Heap::PerformGarbageCollection(GarbageCollector collector,
     PROFILE(isolate_, CodeMovingGCEvent());
   }
 
+#ifdef VERIFY_HEAP
   if (FLAG_verify_heap) {
     VerifySymbolTable();
   }
+#endif
+
   if (collector == MARK_COMPACTOR && global_gc_prologue_callback_) {
     ASSERT(!allocation_allowed_);
     GCTracer::Scope scope(tracer, GCTracer::Scope::EXTERNAL);
@@ -934,11 +957,16 @@ bool Heap::PerformGarbageCollection(GarbageCollector collector,
 
   isolate_->counters()->objs_since_last_young()->Set(0);
 
+  // Callbacks that fire after this point might trigger nested GCs and
+  // restart incremental marking, the assertion can't be moved down.
+  ASSERT(collector == SCAVENGER || incremental_marking()->IsStopped());
+
   gc_post_processing_depth_++;
   { DisableAssertNoAllocation allow_allocation;
     GCTracer::Scope scope(tracer, GCTracer::Scope::EXTERNAL);
     next_gc_likely_to_collect_more =
-        isolate_->global_handles()->PostGarbageCollectionProcessing(collector);
+        isolate_->global_handles()->PostGarbageCollectionProcessing(
+            collector, tracer);
   }
   gc_post_processing_depth_--;
 
@@ -963,9 +991,12 @@ bool Heap::PerformGarbageCollection(GarbageCollector collector,
     GCTracer::Scope scope(tracer, GCTracer::Scope::EXTERNAL);
     global_gc_epilogue_callback_();
   }
+
+#ifdef VERIFY_HEAP
   if (FLAG_verify_heap) {
     VerifySymbolTable();
   }
+#endif
 
   return next_gc_likely_to_collect_more;
 }
@@ -992,7 +1023,7 @@ void Heap::MarkCompact(GCTracer* tracer) {
 
   contexts_disposed_ = 0;
 
-  isolate_->set_context_exit_happened(false);
+  flush_monomorphic_ics_ = false;
 }
 
 
@@ -1048,7 +1079,7 @@ class ScavengeVisitor: public ObjectVisitor {
 };
 
 
-#ifdef DEBUG
+#ifdef VERIFY_HEAP
 // Visitor class to verify pointers in code or data space do not point into
 // new space.
 class VerifyNonPointerSpacePointersVisitor: public ObjectVisitor {
@@ -1056,7 +1087,7 @@ class VerifyNonPointerSpacePointersVisitor: public ObjectVisitor {
   void VisitPointers(Object** start, Object**end) {
     for (Object** current = start; current < end; current++) {
       if ((*current)->IsHeapObject()) {
-        ASSERT(!HEAP->InNewSpace(HeapObject::cast(*current)));
+        CHECK(!HEAP->InNewSpace(HeapObject::cast(*current)));
       }
     }
   }
@@ -1081,7 +1112,7 @@ static void VerifyNonPointerSpacePointers() {
       object->Iterate(&v);
   }
 }
-#endif
+#endif  // VERIFY_HEAP
 
 
 void Heap::CheckNewSpaceExpansionCriteria() {
@@ -1220,7 +1251,8 @@ class ScavengeWeakObjectRetainer : public WeakObjectRetainer {
 
 void Heap::Scavenge() {
   RelocationLock relocation_lock(this);
-#ifdef DEBUG
+
+#ifdef VERIFY_HEAP
   if (FLAG_verify_heap) VerifyNonPointerSpacePointers();
 #endif
 
@@ -1296,10 +1328,23 @@ void Heap::Scavenge() {
     }
   }
 
+  // Copy objects reachable from the code flushing candidates list.
+  MarkCompactCollector* collector = mark_compact_collector();
+  if (collector->is_code_flushing_enabled()) {
+    collector->code_flusher()->IteratePointersToFromSpace(&scavenge_visitor);
+  }
+
   // Scavenge object reachable from the native contexts list directly.
   scavenge_visitor.VisitPointer(BitCast<Object**>(&native_contexts_list_));
 
   new_space_front = DoScavenge(&scavenge_visitor, new_space_front);
+
+  while (isolate()->global_handles()->IterateObjectGroups(
+      &scavenge_visitor, &IsUnscavengedHeapObject)) {
+    new_space_front = DoScavenge(&scavenge_visitor, new_space_front);
+  }
+  isolate()->global_handles()->RemoveObjectGroups();
+
   isolate_->global_handles()->IdentifyNewSpaceWeakIndependentHandles(
       &IsUnscavengedHeapObject);
   isolate_->global_handles()->IterateNewSpaceWeakIndependentRoots(
@@ -1357,9 +1402,11 @@ String* Heap::UpdateNewSpaceReferenceInExternalStringTableEntry(Heap* heap,
 
 void Heap::UpdateNewSpaceReferencesInExternalStringTable(
     ExternalStringTableUpdaterCallback updater_func) {
+#ifdef VERIFY_HEAP
   if (FLAG_verify_heap) {
     external_string_table_.Verify();
   }
+#endif
 
   if (external_string_table_.new_space_strings_.is_empty()) return;
 
@@ -1537,13 +1584,40 @@ void Heap::ProcessWeakReferences(WeakObjectRetainer* retainer) {
 void Heap::VisitExternalResources(v8::ExternalResourceVisitor* visitor) {
   AssertNoAllocation no_allocation;
 
-  class VisitorAdapter : public ObjectVisitor {
+  // Both the external string table and the symbol table may contain
+  // external strings, but neither lists them exhaustively, nor is the
+  // intersection set empty.  Therefore we iterate over the external string
+  // table first, ignoring symbols, and then over the symbol table.
+
+  class ExternalStringTableVisitorAdapter : public ObjectVisitor {
+   public:
+    explicit ExternalStringTableVisitorAdapter(
+        v8::ExternalResourceVisitor* visitor) : visitor_(visitor) {}
+    virtual void VisitPointers(Object** start, Object** end) {
+      for (Object** p = start; p < end; p++) {
+        // Visit non-symbol external strings,
+        // since symbols are listed in the symbol table.
+        if (!(*p)->IsSymbol()) {
+          ASSERT((*p)->IsExternalString());
+          visitor_->VisitExternalString(Utils::ToLocal(
+              Handle<String>(String::cast(*p))));
+        }
+      }
+    }
+   private:
+    v8::ExternalResourceVisitor* visitor_;
+  } external_string_table_visitor(visitor);
+
+  external_string_table_.Iterate(&external_string_table_visitor);
+
+  class SymbolTableVisitorAdapter : public ObjectVisitor {
    public:
-    explicit VisitorAdapter(v8::ExternalResourceVisitor* visitor)
-        : visitor_(visitor) {}
+    explicit SymbolTableVisitorAdapter(
+        v8::ExternalResourceVisitor* visitor) : visitor_(visitor) {}
     virtual void VisitPointers(Object** start, Object** end) {
       for (Object** p = start; p < end; p++) {
         if ((*p)->IsExternalString()) {
+          ASSERT((*p)->IsSymbol());
           visitor_->VisitExternalString(Utils::ToLocal(
               Handle<String>(String::cast(*p))));
         }
@@ -1551,8 +1625,9 @@ void Heap::VisitExternalResources(v8::ExternalResourceVisitor* visitor) {
     }
    private:
     v8::ExternalResourceVisitor* visitor_;
-  } visitor_adapter(visitor);
-  external_string_table_.Iterate(&visitor_adapter);
+  } symbol_table_visitor(visitor);
+
+  symbol_table()->IterateElements(&symbol_table_visitor);
 }
 
 
@@ -1649,7 +1724,7 @@ template<MarksHandling marks_handling,
 class ScavengingVisitor : public StaticVisitorBase {
  public:
   static void Initialize() {
-    table_.Register(kVisitSeqAsciiString, &EvacuateSeqAsciiString);
+    table_.Register(kVisitSeqOneByteString, &EvacuateSeqOneByteString);
     table_.Register(kVisitSeqTwoByteString, &EvacuateSeqTwoByteString);
     table_.Register(kVisitShortcutCandidate, &EvacuateShortcutCandidate);
     table_.Register(kVisitByteArray, &EvacuateByteArray);
@@ -1893,11 +1968,11 @@ class ScavengingVisitor : public StaticVisitorBase {
   }
 
 
-  static inline void EvacuateSeqAsciiString(Map* map,
+  static inline void EvacuateSeqOneByteString(Map* map,
                                             HeapObject** slot,
                                             HeapObject* object) {
-    int object_size = SeqAsciiString::cast(object)->
-        SeqAsciiStringSize(map->instance_type());
+    int object_size = SeqOneByteString::cast(object)->
+        SeqOneByteStringSize(map->instance_type());
     EvacuateObject<DATA_OBJECT, UNKNOWN_SIZE, kObjectAlignment>(
         map, slot, object, object_size);
   }
@@ -2064,7 +2139,9 @@ MaybeObject* Heap::AllocatePartialMap(InstanceType instance_type,
   reinterpret_cast<Map*>(result)->set_unused_property_fields(0);
   reinterpret_cast<Map*>(result)->set_bit_field(0);
   reinterpret_cast<Map*>(result)->set_bit_field2(0);
-  reinterpret_cast<Map*>(result)->set_bit_field3(0);
+  int bit_field3 = Map::EnumLengthBits::encode(Map::kInvalidEnumCache) |
+                   Map::OwnsDescriptors::encode(true);
+  reinterpret_cast<Map*>(result)->set_bit_field3(bit_field3);
   return result;
 }
 
@@ -2089,18 +2166,14 @@ MaybeObject* Heap::AllocateMap(InstanceType instance_type,
   map->set_code_cache(empty_fixed_array(), SKIP_WRITE_BARRIER);
   map->init_back_pointer(undefined_value());
   map->set_unused_property_fields(0);
+  map->set_instance_descriptors(empty_descriptor_array());
   map->set_bit_field(0);
   map->set_bit_field2(1 << Map::kIsExtensible);
-  int bit_field3 = Map::EnumLengthBits::encode(Map::kInvalidEnumCache);
+  int bit_field3 = Map::EnumLengthBits::encode(Map::kInvalidEnumCache) |
+                   Map::OwnsDescriptors::encode(true);
   map->set_bit_field3(bit_field3);
   map->set_elements_kind(elements_kind);
 
-  // If the map object is aligned fill the padding area with Smi 0 objects.
-  if (Map::kPadStart < Map::kSize) {
-    memset(reinterpret_cast<byte*>(map) + Map::kPadStart - kHeapObjectTag,
-           0,
-           Map::kSize - Map::kPadStart);
-  }
   return map;
 }
 
@@ -2227,12 +2300,15 @@ bool Heap::CreateInitialMaps() {
   // Fix the instance_descriptors for the existing maps.
   meta_map()->set_code_cache(empty_fixed_array());
   meta_map()->init_back_pointer(undefined_value());
+  meta_map()->set_instance_descriptors(empty_descriptor_array());
 
   fixed_array_map()->set_code_cache(empty_fixed_array());
   fixed_array_map()->init_back_pointer(undefined_value());
+  fixed_array_map()->set_instance_descriptors(empty_descriptor_array());
 
   oddball_map()->set_code_cache(empty_fixed_array());
   oddball_map()->init_back_pointer(undefined_value());
+  oddball_map()->set_instance_descriptors(empty_descriptor_array());
 
   // Fix prototype object for existing maps.
   meta_map()->set_prototype(null_value());
@@ -2463,6 +2539,14 @@ bool Heap::CreateInitialMaps() {
   }
   set_message_object_map(Map::cast(obj));
 
+  Map* external_map;
+  { MaybeObject* maybe_obj =
+        AllocateMap(JS_OBJECT_TYPE, JSObject::kHeaderSize + kPointerSize);
+    if (!maybe_obj->To(&external_map)) return false;
+  }
+  external_map->set_is_extensible(false);
+  set_external_map(external_map);
+
   ASSERT(!InNewSpace(empty_fixed_array()));
   return true;
 }
@@ -2681,7 +2765,7 @@ bool Heap::CreateInitialObjects() {
   set_termination_exception(obj);
 
   // Allocate the empty string.
-  { MaybeObject* maybe_obj = AllocateRawAsciiString(0, TENURED);
+  { MaybeObject* maybe_obj = AllocateRawOneByteString(0, TENURED);
     if (!maybe_obj->ToObject(&obj)) return false;
   }
   set_empty_string(String::cast(obj));
@@ -2701,7 +2785,7 @@ bool Heap::CreateInitialObjects() {
   // hash code in place. The hash code for the hidden_symbol is zero to ensure
   // that it will always be at the first entry in property descriptors.
   { MaybeObject* maybe_obj =
-        AllocateSymbol(CStrVector(""), 0, String::kZeroHash);
+        AllocateSymbol(CStrVector(""), 0, String::kEmptyStringHash);
     if (!maybe_obj->ToObject(&obj)) return false;
   }
   hidden_symbol_ = String::cast(obj);
@@ -2780,6 +2864,15 @@ bool Heap::CreateInitialObjects() {
   }
   set_natives_source_cache(FixedArray::cast(obj));
 
+  // Allocate object to hold object observation state.
+  { MaybeObject* maybe_obj = AllocateMap(JS_OBJECT_TYPE, JSObject::kHeaderSize);
+    if (!maybe_obj->ToObject(&obj)) return false;
+  }
+  { MaybeObject* maybe_obj = AllocateJSObjectFromMap(Map::cast(obj));
+    if (!maybe_obj->ToObject(&obj)) return false;
+  }
+  set_observation_state(JSObject::cast(obj));
+
   // Handling of script id generation is in FACTORY->NewScript.
   set_last_script_id(undefined_value());
 
@@ -2799,6 +2892,34 @@ bool Heap::CreateInitialObjects() {
 }
 
 
+bool Heap::RootCanBeWrittenAfterInitialization(Heap::RootListIndex root_index) {
+  RootListIndex writable_roots[] = {
+    kStoreBufferTopRootIndex,
+    kStackLimitRootIndex,
+    kInstanceofCacheFunctionRootIndex,
+    kInstanceofCacheMapRootIndex,
+    kInstanceofCacheAnswerRootIndex,
+    kCodeStubsRootIndex,
+    kNonMonomorphicCacheRootIndex,
+    kPolymorphicCodeCacheRootIndex,
+    kLastScriptIdRootIndex,
+    kEmptyScriptRootIndex,
+    kRealStackLimitRootIndex,
+    kArgumentsAdaptorDeoptPCOffsetRootIndex,
+    kConstructStubDeoptPCOffsetRootIndex,
+    kGetterStubDeoptPCOffsetRootIndex,
+    kSetterStubDeoptPCOffsetRootIndex,
+    kSymbolTableRootIndex,
+  };
+
+  for (unsigned int i = 0; i < ARRAY_SIZE(writable_roots); i++) {
+    if (root_index == writable_roots[i])
+      return true;
+  }
+  return false;
+}
+
+
 Object* RegExpResultsCache::Lookup(Heap* heap,
                                    String* key_string,
                                    Object* key_pattern,
@@ -3016,7 +3137,7 @@ MaybeObject* Heap::NumberToString(Object* number,
   }
 
   Object* js_string;
-  MaybeObject* maybe_js_string = AllocateStringFromAscii(CStrVector(str));
+  MaybeObject* maybe_js_string = AllocateStringFromOneByte(CStrVector(str));
   if (maybe_js_string->ToObject(&js_string)) {
     SetNumberStringCache(number, String::cast(js_string));
   }
@@ -3190,10 +3311,10 @@ MUST_USE_RESULT static inline MaybeObject* MakeOrFindTwoCharacterString(
   } else if ((c1 | c2) <= String::kMaxAsciiCharCodeU) {  // We can do this
     ASSERT(IsPowerOf2(String::kMaxAsciiCharCodeU + 1));  // because of this.
     Object* result;
-    { MaybeObject* maybe_result = heap->AllocateRawAsciiString(2);
+    { MaybeObject* maybe_result = heap->AllocateRawOneByteString(2);
       if (!maybe_result->ToObject(&result)) return maybe_result;
     }
-    char* dest = SeqAsciiString::cast(result)->GetChars();
+    char* dest = SeqOneByteString::cast(result)->GetChars();
     dest[0] = c1;
     dest[1] = c2;
     return result;
@@ -3232,8 +3353,8 @@ MaybeObject* Heap::AllocateConsString(String* first, String* second) {
     return MakeOrFindTwoCharacterString(this, c1, c2);
   }
 
-  bool first_is_ascii = first->IsAsciiRepresentation();
-  bool second_is_ascii = second->IsAsciiRepresentation();
+  bool first_is_ascii = first->IsOneByteRepresentation();
+  bool second_is_ascii = second->IsOneByteRepresentation();
   bool is_ascii = first_is_ascii && second_is_ascii;
 
   // Make sure that an out of memory exception is thrown if the length
@@ -3263,35 +3384,35 @@ MaybeObject* Heap::AllocateConsString(String* first, String* second) {
     ASSERT(second->IsFlat());
     if (is_ascii) {
       Object* result;
-      { MaybeObject* maybe_result = AllocateRawAsciiString(length);
+      { MaybeObject* maybe_result = AllocateRawOneByteString(length);
         if (!maybe_result->ToObject(&result)) return maybe_result;
       }
       // Copy the characters into the new object.
-      char* dest = SeqAsciiString::cast(result)->GetChars();
+      char* dest = SeqOneByteString::cast(result)->GetChars();
       // Copy first part.
       const char* src;
       if (first->IsExternalString()) {
         src = ExternalAsciiString::cast(first)->GetChars();
       } else {
-        src = SeqAsciiString::cast(first)->GetChars();
+        src = SeqOneByteString::cast(first)->GetChars();
       }
       for (int i = 0; i < first_length; i++) *dest++ = src[i];
       // Copy second part.
       if (second->IsExternalString()) {
         src = ExternalAsciiString::cast(second)->GetChars();
       } else {
-        src = SeqAsciiString::cast(second)->GetChars();
+        src = SeqOneByteString::cast(second)->GetChars();
       }
       for (int i = 0; i < second_length; i++) *dest++ = src[i];
       return result;
     } else {
       if (is_ascii_data_in_two_byte_string) {
         Object* result;
-        { MaybeObject* maybe_result = AllocateRawAsciiString(length);
+        { MaybeObject* maybe_result = AllocateRawOneByteString(length);
           if (!maybe_result->ToObject(&result)) return maybe_result;
         }
         // Copy the characters into the new object.
-        char* dest = SeqAsciiString::cast(result)->GetChars();
+        char* dest = SeqOneByteString::cast(result)->GetChars();
         String::WriteToFlat(first, dest, 0, first_length);
         String::WriteToFlat(second, dest + first_length, 0, second_length);
         isolate_->counters()->string_add_runtime_ext_to_ascii()->Increment();
@@ -3358,17 +3479,17 @@ MaybeObject* Heap::AllocateSubString(String* buffer,
     // WriteToFlat takes care of the case when an indirect string has a
     // different encoding from its underlying string.  These encodings may
     // differ because of externalization.
-    bool is_ascii = buffer->IsAsciiRepresentation();
+    bool is_ascii = buffer->IsOneByteRepresentation();
     { MaybeObject* maybe_result = is_ascii
-                                  ? AllocateRawAsciiString(length, pretenure)
+                                  ? AllocateRawOneByteString(length, pretenure)
                                   : AllocateRawTwoByteString(length, pretenure);
       if (!maybe_result->ToObject(&result)) return maybe_result;
     }
     String* string_result = String::cast(result);
     // Copy the characters into the new object.
     if (is_ascii) {
-      ASSERT(string_result->IsAsciiRepresentation());
-      char* dest = SeqAsciiString::cast(string_result)->GetChars();
+      ASSERT(string_result->IsOneByteRepresentation());
+      char* dest = SeqOneByteString::cast(string_result)->GetChars();
       String::WriteToFlat(buffer, dest, start, end);
     } else {
       ASSERT(string_result->IsTwoByteRepresentation());
@@ -3379,7 +3500,7 @@ MaybeObject* Heap::AllocateSubString(String* buffer,
   }
 
   ASSERT(buffer->IsFlat());
-#if DEBUG
+#if VERIFY_HEAP
   if (FLAG_verify_heap) {
     buffer->StringVerify();
   }
@@ -3392,7 +3513,7 @@ MaybeObject* Heap::AllocateSubString(String* buffer,
   // indirect ASCII string is pointing to a two-byte string, the two-byte char
   // codes of the underlying string must still fit into ASCII (because
   // externalization must not change char codes).
-  { Map* map = buffer->IsAsciiRepresentation()
+  { Map* map = buffer->IsOneByteRepresentation()
                  ? sliced_ascii_string_map()
                  : sliced_string_map();
     MaybeObject* maybe_result = Allocate(map, NEW_SPACE);
@@ -3596,17 +3717,27 @@ MaybeObject* Heap::CreateCode(const CodeDesc& desc,
   MaybeObject* maybe_result;
   // Large code objects and code objects which should stay at a fixed address
   // are allocated in large object space.
-  if (obj_size > code_space()->AreaSize() || immovable) {
+  HeapObject* result;
+  bool force_lo_space = obj_size > code_space()->AreaSize();
+  if (force_lo_space) {
     maybe_result = lo_space_->AllocateRaw(obj_size, EXECUTABLE);
   } else {
     maybe_result = code_space_->AllocateRaw(obj_size);
   }
+  if (!maybe_result->To<HeapObject>(&result)) return maybe_result;
 
-  Object* result;
-  if (!maybe_result->ToObject(&result)) return maybe_result;
+  if (immovable && !force_lo_space &&
+      // Objects on the first page of each space are never moved.
+      !code_space_->FirstPage()->Contains(result->address())) {
+    // Discard the first code allocation, which was on a page where it could be
+    // moved.
+    CreateFillerObjectAt(result->address(), obj_size);
+    maybe_result = lo_space_->AllocateRaw(obj_size, EXECUTABLE);
+    if (!maybe_result->To<HeapObject>(&result)) return maybe_result;
+  }
 
   // Initialize the object
-  HeapObject::cast(result)->set_map_no_write_barrier(code_map());
+  result->set_map_no_write_barrier(code_map());
   Code* code = Code::cast(result);
   ASSERT(!isolate_->code_range()->exists() ||
       isolate_->code_range()->contains(code->address()));
@@ -3617,10 +3748,11 @@ MaybeObject* Heap::CreateCode(const CodeDesc& desc,
     code->set_check_type(RECEIVER_MAP_CHECK);
   }
   code->set_deoptimization_data(empty_fixed_array(), SKIP_WRITE_BARRIER);
-  code->set_type_feedback_info(undefined_value(), SKIP_WRITE_BARRIER);
+  code->InitializeTypeFeedbackInfoNoWriteBarrier(undefined_value());
   code->set_handler_table(empty_fixed_array(), SKIP_WRITE_BARRIER);
   code->set_gc_metadata(Smi::FromInt(0));
   code->set_ic_age(global_ic_age_);
+  code->set_prologue_offset(kPrologueOffsetNotSet);
   // Allow self references to created code object by patching the handle to
   // point to the newly allocated Code object.
   if (!self_reference.is_null()) {
@@ -3633,7 +3765,7 @@ MaybeObject* Heap::CreateCode(const CodeDesc& desc,
   // through the self_reference parameter.
   code->CopyFrom(desc);
 
-#ifdef DEBUG
+#ifdef VERIFY_HEAP
   if (FLAG_verify_heap) {
     code->Verify();
   }
@@ -3715,7 +3847,7 @@ MaybeObject* Heap::CopyCode(Code* code, Vector<byte> reloc_info) {
       isolate_->code_range()->contains(code->address()));
   new_code->Relocate(new_addr - old_addr);
 
-#ifdef DEBUG
+#ifdef VERIFY_HEAP
   if (FLAG_verify_heap) {
     code->Verify();
   }
@@ -3932,8 +4064,7 @@ MaybeObject* Heap::AllocateInitialMap(JSFunction* fun) {
       if (HasDuplicates(descriptors)) {
         fun->shared()->ForbidInlineConstructor();
       } else {
-        MaybeObject* maybe_failure = map->InitializeDescriptors(descriptors);
-        if (maybe_failure->IsFailure()) return maybe_failure;
+        map->InitializeDescriptors(descriptors);
         map->set_pre_allocated_property_fields(count);
         map->set_unused_property_fields(in_object_properties - count);
       }
@@ -4012,7 +4143,7 @@ MaybeObject* Heap::AllocateJSObjectFromMap(Map* map, PretenureFlag pretenure) {
   InitializeJSObjectFromMap(JSObject::cast(obj),
                             FixedArray::cast(properties),
                             map);
-  ASSERT(JSObject::cast(obj)->HasFastSmiOrObjectElements());
+  ASSERT(JSObject::cast(obj)->HasFastElements());
   return obj;
 }
 
@@ -4062,9 +4193,6 @@ MaybeObject* Heap::AllocateJSArrayAndStorage(
     ArrayStorageAllocationMode mode,
     PretenureFlag pretenure) {
   ASSERT(capacity >= length);
-  if (length != 0 && mode == INITIALIZE_ARRAY_ELEMENTS_WITH_HOLE) {
-    elements_kind = GetHoleyElementsKind(elements_kind);
-  }
   MaybeObject* maybe_array = AllocateJSArray(elements_kind, pretenure);
   JSArray* array;
   if (!maybe_array->To(&array)) return maybe_array;
@@ -4077,7 +4205,7 @@ MaybeObject* Heap::AllocateJSArrayAndStorage(
 
   FixedArrayBase* elms;
   MaybeObject* maybe_elms = NULL;
-  if (elements_kind == FAST_DOUBLE_ELEMENTS) {
+  if (IsFastDoubleElementsKind(elements_kind)) {
     if (mode == DONT_INITIALIZE_ARRAY_ELEMENTS) {
       maybe_elms = AllocateUninitializedFixedDoubleArray(capacity);
     } else {
@@ -4104,13 +4232,14 @@ MaybeObject* Heap::AllocateJSArrayAndStorage(
 MaybeObject* Heap::AllocateJSArrayWithElements(
     FixedArrayBase* elements,
     ElementsKind elements_kind,
+    int length,
     PretenureFlag pretenure) {
   MaybeObject* maybe_array = AllocateJSArray(elements_kind, pretenure);
   JSArray* array;
   if (!maybe_array->To(&array)) return maybe_array;
 
   array->set_elements(elements);
-  array->set_length(Smi::FromInt(elements->length()));
+  array->set_length(Smi::FromInt(length));
   array->ValidateElements();
   return array;
 }
@@ -4186,7 +4315,7 @@ MaybeObject* Heap::AllocateGlobalObject(JSFunction* constructor) {
   StringDictionary* dictionary;
   MaybeObject* maybe_dictionary =
       StringDictionary::Allocate(
-          map->NumberOfDescribedProperties() * 2 + initial_size);
+          map->NumberOfOwnDescriptors() * 2 + initial_size);
   if (!maybe_dictionary->To(&dictionary)) return maybe_dictionary;
 
   // The global object might be created from an object template with accessors.
@@ -4388,34 +4517,33 @@ MaybeObject* Heap::ReinitializeJSGlobalProxy(JSFunction* constructor,
 }
 
 
-MaybeObject* Heap::AllocateStringFromAscii(Vector<const char> string,
+MaybeObject* Heap::AllocateStringFromOneByte(Vector<const char> string,
                                            PretenureFlag pretenure) {
-  if (string.length() == 1) {
+  int length = string.length();
+  if (length == 1) {
     return Heap::LookupSingleCharacterStringFromCode(string[0]);
   }
   Object* result;
   { MaybeObject* maybe_result =
-        AllocateRawAsciiString(string.length(), pretenure);
+        AllocateRawOneByteString(string.length(), pretenure);
     if (!maybe_result->ToObject(&result)) return maybe_result;
   }
 
   // Copy the characters into the new object.
-  SeqAsciiString* string_result = SeqAsciiString::cast(result);
-  for (int i = 0; i < string.length(); i++) {
-    string_result->SeqAsciiStringSet(i, string[i]);
-  }
+  CopyChars(SeqOneByteString::cast(result)->GetChars(), string.start(), length);
   return result;
 }
 
 
 MaybeObject* Heap::AllocateStringFromUtf8Slow(Vector<const char> string,
+                                              int non_ascii_start,
                                               PretenureFlag pretenure) {
-  // Count the number of characters in the UTF-8 string and check if
-  // it is an ASCII string.
+  // Continue counting the number of characters in the UTF-8 string, starting
+  // from the first non-ascii character or word.
+  int chars = non_ascii_start;
   Access<UnicodeCache::Utf8Decoder>
       decoder(isolate_->unicode_cache()->utf8_decoder());
-  decoder->Reset(string.start(), string.length());
-  int chars = 0;
+  decoder->Reset(string.start() + non_ascii_start, string.length() - chars);
   while (decoder->has_more()) {
     uint32_t r = decoder->GetNext();
     if (r <= unibrow::Utf16::kMaxNonSurrogateCharCode) {
@@ -4431,16 +4559,16 @@ MaybeObject* Heap::AllocateStringFromUtf8Slow(Vector<const char> string,
   }
 
   // Convert and copy the characters into the new object.
-  String* string_result = String::cast(result);
+  SeqTwoByteString* twobyte = SeqTwoByteString::cast(result);
   decoder->Reset(string.start(), string.length());
   int i = 0;
   while (i < chars) {
     uint32_t r = decoder->GetNext();
     if (r > unibrow::Utf16::kMaxNonSurrogateCharCode) {
-      string_result->Set(i++, unibrow::Utf16::LeadSurrogate(r));
-      string_result->Set(i++, unibrow::Utf16::TrailSurrogate(r));
+      twobyte->SeqTwoByteStringSet(i++, unibrow::Utf16::LeadSurrogate(r));
+      twobyte->SeqTwoByteStringSet(i++, unibrow::Utf16::TrailSurrogate(r));
     } else {
-      string_result->Set(i++, r);
+      twobyte->SeqTwoByteStringSet(i++, r);
     }
   }
   return result;
@@ -4450,20 +4578,18 @@ MaybeObject* Heap::AllocateStringFromUtf8Slow(Vector<const char> string,
 MaybeObject* Heap::AllocateStringFromTwoByte(Vector<const uc16> string,
                                              PretenureFlag pretenure) {
   // Check if the string is an ASCII string.
-  MaybeObject* maybe_result;
-  if (String::IsAscii(string.start(), string.length())) {
-    maybe_result = AllocateRawAsciiString(string.length(), pretenure);
-  } else {  // It's not an ASCII string.
-    maybe_result = AllocateRawTwoByteString(string.length(), pretenure);
-  }
   Object* result;
-  if (!maybe_result->ToObject(&result)) return maybe_result;
+  int length = string.length();
+  const uc16* start = string.start();
 
-  // Copy the characters into the new object, which may be either ASCII or
-  // UTF-16.
-  String* string_result = String::cast(result);
-  for (int i = 0; i < string.length(); i++) {
-    string_result->Set(i, string[i]);
+  if (String::IsAscii(start, length)) {
+    MaybeObject* maybe_result = AllocateRawOneByteString(length, pretenure);
+    if (!maybe_result->ToObject(&result)) return maybe_result;
+    CopyChars(SeqOneByteString::cast(result)->GetChars(), start, length);
+  } else {  // It's not an ASCII string.
+    MaybeObject* maybe_result = AllocateRawTwoByteString(length, pretenure);
+    if (!maybe_result->ToObject(&result)) return maybe_result;
+    CopyChars(SeqTwoByteString::cast(result)->GetChars(), start, length);
   }
   return result;
 }
@@ -4514,11 +4640,11 @@ MaybeObject* Heap::AllocateInternalSymbol(unibrow::CharacterStream* buffer,
   Map* map;
 
   if (is_ascii) {
-    if (chars > SeqAsciiString::kMaxLength) {
+    if (chars > SeqOneByteString::kMaxLength) {
       return Failure::OutOfMemoryException();
     }
     map = ascii_symbol_map();
-    size = SeqAsciiString::SizeFor(chars);
+    size = SeqOneByteString::SizeFor(chars);
   } else {
     if (chars > SeqTwoByteString::kMaxLength) {
       return Failure::OutOfMemoryException();
@@ -4558,13 +4684,14 @@ MaybeObject* Heap::AllocateInternalSymbol(unibrow::CharacterStream* buffer,
 }
 
 
-MaybeObject* Heap::AllocateRawAsciiString(int length, PretenureFlag pretenure) {
-  if (length < 0 || length > SeqAsciiString::kMaxLength) {
+MaybeObject* Heap::AllocateRawOneByteString(int length,
+                                            PretenureFlag pretenure) {
+  if (length < 0 || length > SeqOneByteString::kMaxLength) {
     return Failure::OutOfMemoryException();
   }
 
-  int size = SeqAsciiString::SizeFor(length);
-  ASSERT(size <= SeqAsciiString::kMaxSize);
+  int size = SeqOneByteString::SizeFor(length);
+  ASSERT(size <= SeqOneByteString::kMaxSize);
 
   AllocationSpace space = (pretenure == TENURED) ? OLD_DATA_SPACE : NEW_SPACE;
   AllocationSpace retry_space = OLD_DATA_SPACE;
@@ -4592,14 +4719,14 @@ MaybeObject* Heap::AllocateRawAsciiString(int length, PretenureFlag pretenure) {
   String::cast(result)->set_hash_field(String::kEmptyHashField);
   ASSERT_EQ(size, HeapObject::cast(result)->Size());
 
-#ifdef DEBUG
+#ifdef VERIFY_HEAP
   if (FLAG_verify_heap) {
     // Initialize string's content to ensure ASCII-ness (character range 0-127)
     // as required when verifying the heap.
-    char* dest = SeqAsciiString::cast(result)->GetChars();
+    char* dest = SeqOneByteString::cast(result)->GetChars();
     memset(dest, 0x0F, length * kCharSize);
   }
-#endif  // DEBUG
+#endif
 
   return result;
 }
@@ -4972,7 +5099,7 @@ MaybeObject* Heap::AllocateModuleContext(ScopeInfo* scope_info) {
   }
   Context* context = reinterpret_cast<Context*>(result);
   context->set_map_no_write_barrier(module_context_map());
-  // Context links will be set later.
+  // Instance link will be set later.
   context->set_extension(Smi::FromInt(0));
   return context;
 }
@@ -5059,6 +5186,20 @@ MaybeObject* Heap::AllocateScopeInfo(int length) {
 }
 
 
+MaybeObject* Heap::AllocateExternal(void* value) {
+  Foreign* foreign;
+  { MaybeObject* maybe_result = AllocateForeign(static_cast<Address>(value));
+    if (!maybe_result->To(&foreign)) return maybe_result;
+  }
+  JSObject* external;
+  { MaybeObject* maybe_result = AllocateJSObjectFromMap(external_map());
+    if (!maybe_result->To(&external)) return maybe_result;
+  }
+  external->SetInternalField(0, foreign);
+  return external;
+}
+
+
 MaybeObject* Heap::AllocateStruct(InstanceType type) {
   Map* map;
   switch (type) {
@@ -5128,7 +5269,8 @@ bool Heap::IdleNotification(int hint) {
   // The size factor is in range [5..250]. The numbers here are chosen from
   // experiments. If you changes them, make sure to test with
   // chrome/performance_ui_tests --gtest_filter="GeneralMixMemoryTest.*
-  intptr_t step_size = size_factor * IncrementalMarking::kAllocatedThreshold;
+  intptr_t step_size =
+      size_factor * IncrementalMarking::kAllocatedThreshold;
 
   if (contexts_disposed_ > 0) {
     if (hint >= kMaxHint) {
@@ -5147,10 +5289,6 @@ bool Heap::IdleNotification(int hint) {
       AdvanceIdleIncrementalMarking(step_size);
       contexts_disposed_ = 0;
     }
-    // Make sure that we have no pending context disposals.
-    // Take into account that we might have decided to delay full collection
-    // because incremental marking is in progress.
-    ASSERT((contexts_disposed_ == 0) || !incremental_marking()->IsStopped());
     // After context disposal there is likely a lot of garbage remaining, reset
     // the idle notification counters in order to trigger more incremental GCs
     // on subsequent idle notifications.
@@ -5388,9 +5526,9 @@ bool Heap::InSpace(Address addr, AllocationSpace space) {
 }
 
 
-#ifdef DEBUG
+#ifdef VERIFY_HEAP
 void Heap::Verify() {
-  ASSERT(HasBeenSetUp());
+  CHECK(HasBeenSetUp());
 
   store_buffer()->Verify();
 
@@ -5409,9 +5547,7 @@ void Heap::Verify() {
 
   lo_space_->Verify();
 }
-
-
-#endif  // DEBUG
+#endif
 
 
 MaybeObject* Heap::LookupSymbol(Vector<const char> string) {
@@ -5444,7 +5580,7 @@ MaybeObject* Heap::LookupAsciiSymbol(Vector<const char> string) {
 }
 
 
-MaybeObject* Heap::LookupAsciiSymbol(Handle<SeqAsciiString> string,
+MaybeObject* Heap::LookupAsciiSymbol(Handle<SeqOneByteString> string,
                                      int from,
                                      int length) {
   Object* symbol = NULL;
@@ -5504,7 +5640,6 @@ bool Heap::LookupSymbolIfExists(String* string, String** symbol) {
 }
 
 
-#ifdef DEBUG
 void Heap::ZapFromSpace() {
   NewSpacePageIterator it(new_space_.FromSpaceStart(),
                           new_space_.FromSpaceEnd());
@@ -5517,7 +5652,6 @@ void Heap::ZapFromSpace() {
     }
   }
 }
-#endif  // DEBUG
 
 
 void Heap::IterateAndMarkPointersToFromSpace(Address start,
@@ -5947,172 +6081,6 @@ intptr_t Heap::PromotedExternalMemorySize() {
       - amount_of_external_allocated_memory_at_last_global_gc_;
 }
 
-#ifdef DEBUG
-
-// Tags 0, 1, and 3 are used. Use 2 for marking visited HeapObject.
-static const int kMarkTag = 2;
-
-
-class HeapDebugUtils {
- public:
-  explicit HeapDebugUtils(Heap* heap)
-    : search_for_any_global_(false),
-      search_target_(NULL),
-      found_target_(false),
-      object_stack_(20),
-      heap_(heap) {
-  }
-
-  class MarkObjectVisitor : public ObjectVisitor {
-   public:
-    explicit MarkObjectVisitor(HeapDebugUtils* utils) : utils_(utils) { }
-
-    void VisitPointers(Object** start, Object** end) {
-      // Copy all HeapObject pointers in [start, end)
-      for (Object** p = start; p < end; p++) {
-        if ((*p)->IsHeapObject())
-          utils_->MarkObjectRecursively(p);
-      }
-    }
-
-    HeapDebugUtils* utils_;
-  };
-
-  void MarkObjectRecursively(Object** p) {
-    if (!(*p)->IsHeapObject()) return;
-
-    HeapObject* obj = HeapObject::cast(*p);
-
-    Object* map = obj->map();
-
-    if (!map->IsHeapObject()) return;  // visited before
-
-    if (found_target_) return;  // stop if target found
-    object_stack_.Add(obj);
-    if ((search_for_any_global_ && obj->IsJSGlobalObject()) ||
-        (!search_for_any_global_ && (obj == search_target_))) {
-      found_target_ = true;
-      return;
-    }
-
-    // not visited yet
-    Map* map_p = reinterpret_cast<Map*>(HeapObject::cast(map));
-
-    Address map_addr = map_p->address();
-
-    obj->set_map_no_write_barrier(reinterpret_cast<Map*>(map_addr + kMarkTag));
-
-    MarkObjectRecursively(&map);
-
-    MarkObjectVisitor mark_visitor(this);
-
-    obj->IterateBody(map_p->instance_type(), obj->SizeFromMap(map_p),
-                     &mark_visitor);
-
-    if (!found_target_)  // don't pop if found the target
-      object_stack_.RemoveLast();
-  }
-
-
-  class UnmarkObjectVisitor : public ObjectVisitor {
-   public:
-    explicit UnmarkObjectVisitor(HeapDebugUtils* utils) : utils_(utils) { }
-
-    void VisitPointers(Object** start, Object** end) {
-      // Copy all HeapObject pointers in [start, end)
-      for (Object** p = start; p < end; p++) {
-        if ((*p)->IsHeapObject())
-          utils_->UnmarkObjectRecursively(p);
-      }
-    }
-
-    HeapDebugUtils* utils_;
-  };
-
-
-  void UnmarkObjectRecursively(Object** p) {
-    if (!(*p)->IsHeapObject()) return;
-
-    HeapObject* obj = HeapObject::cast(*p);
-
-    Object* map = obj->map();
-
-    if (map->IsHeapObject()) return;  // unmarked already
-
-    Address map_addr = reinterpret_cast<Address>(map);
-
-    map_addr -= kMarkTag;
-
-    ASSERT_TAG_ALIGNED(map_addr);
-
-    HeapObject* map_p = HeapObject::FromAddress(map_addr);
-
-    obj->set_map_no_write_barrier(reinterpret_cast<Map*>(map_p));
-
-    UnmarkObjectRecursively(reinterpret_cast<Object**>(&map_p));
-
-    UnmarkObjectVisitor unmark_visitor(this);
-
-    obj->IterateBody(Map::cast(map_p)->instance_type(),
-                     obj->SizeFromMap(Map::cast(map_p)),
-                     &unmark_visitor);
-  }
-
-
-  void MarkRootObjectRecursively(Object** root) {
-    if (search_for_any_global_) {
-      ASSERT(search_target_ == NULL);
-    } else {
-      ASSERT(search_target_->IsHeapObject());
-    }
-    found_target_ = false;
-    object_stack_.Clear();
-
-    MarkObjectRecursively(root);
-    UnmarkObjectRecursively(root);
-
-    if (found_target_) {
-      PrintF("=====================================\n");
-      PrintF("====        Path to object       ====\n");
-      PrintF("=====================================\n\n");
-
-      ASSERT(!object_stack_.is_empty());
-      for (int i = 0; i < object_stack_.length(); i++) {
-        if (i > 0) PrintF("\n     |\n     |\n     V\n\n");
-        Object* obj = object_stack_[i];
-        obj->Print();
-      }
-      PrintF("=====================================\n");
-    }
-  }
-
-  // Helper class for visiting HeapObjects recursively.
-  class MarkRootVisitor: public ObjectVisitor {
-   public:
-    explicit MarkRootVisitor(HeapDebugUtils* utils) : utils_(utils) { }
-
-    void VisitPointers(Object** start, Object** end) {
-      // Visit all HeapObject pointers in [start, end)
-      for (Object** p = start; p < end; p++) {
-        if ((*p)->IsHeapObject())
-          utils_->MarkRootObjectRecursively(p);
-      }
-    }
-
-    HeapDebugUtils* utils_;
-  };
-
-  bool search_for_any_global_;
-  Object* search_target_;
-  bool found_target_;
-  List<Object*> object_stack_;
-  Heap* heap_;
-
-  friend class Heap;
-};
-
-#endif
-
 
 V8_DECLARE_ONCE(initialize_gc_once);
 
@@ -6125,7 +6093,6 @@ static void InitializeGCOnce() {
 bool Heap::SetUp(bool create_heap_objects) {
 #ifdef DEBUG
   allocation_timeout_ = FLAG_gc_interval;
-  debug_utils_ = new HeapDebugUtils(this);
 #endif
 
   // Initialize heap spaces and initial maps and objects. Whenever something
@@ -6254,11 +6221,12 @@ void Heap::SetStackLimits() {
 
 
 void Heap::TearDown() {
-#ifdef DEBUG
+#ifdef VERIFY_HEAP
   if (FLAG_verify_heap) {
     Verify();
   }
 #endif
+
   if (FLAG_print_cumulative_gc_stat) {
     PrintF("\n\n");
     PrintF("gc_count=%d ", gc_count_);
@@ -6319,11 +6287,6 @@ void Heap::TearDown() {
   isolate_->memory_allocator()->TearDown();
 
   delete relocation_mutex_;
-
-#ifdef DEBUG
-  delete debug_utils_;
-  debug_utils_ = NULL;
-#endif
 }
 
 
@@ -6902,6 +6865,9 @@ GCTracer::GCTracer(Heap* heap,
       allocated_since_last_gc_(0),
       spent_in_mutator_(0),
       promoted_objects_size_(0),
+      nodes_died_in_new_space_(0),
+      nodes_copied_in_new_space_(0),
+      nodes_promoted_(0),
       heap_(heap),
       gc_reason_(gc_reason),
       collector_reason_(collector_reason) {
@@ -7042,6 +7008,9 @@ GCTracer::~GCTracer() {
 
     PrintF("allocated=%" V8_PTR_PREFIX "d ", allocated_since_last_gc_);
     PrintF("promoted=%" V8_PTR_PREFIX "d ", promoted_objects_size_);
+    PrintF("nodes_died_in_new=%d ", nodes_died_in_new_space_);
+    PrintF("nodes_copied_in_new=%d ", nodes_copied_in_new_space_);
+    PrintF("nodes_promoted=%d ", nodes_promoted_);
 
     if (collector_ == SCAVENGER) {
       PrintF("stepscount=%d ", steps_count_since_last_gc_);
@@ -7049,6 +7018,7 @@ GCTracer::~GCTracer() {
     } else {
       PrintF("stepscount=%d ", steps_count_);
       PrintF("stepstook=%d ", static_cast<int>(steps_took_));
+      PrintF("longeststep=%.f ", longest_step_);
     }
 
     PrintF("\n");
@@ -7129,7 +7099,7 @@ void KeyedLookupCache::Clear() {
 
 
 void DescriptorLookupCache::Clear() {
-  for (int index = 0; index < kLength; index++) keys_[index].array = NULL;
+  for (int index = 0; index < kLength; index++) keys_[index].source = NULL;
 }
 
 
@@ -7169,7 +7139,7 @@ void TranscendentalCache::Clear() {
 void ExternalStringTable::CleanUp() {
   int last = 0;
   for (int i = 0; i < new_space_strings_.length(); ++i) {
-    if (new_space_strings_[i] == heap_->raw_unchecked_the_hole_value()) {
+    if (new_space_strings_[i] == heap_->the_hole_value()) {
       continue;
     }
     if (heap_->InNewSpace(new_space_strings_[i])) {
@@ -7181,16 +7151,18 @@ void ExternalStringTable::CleanUp() {
   new_space_strings_.Rewind(last);
   last = 0;
   for (int i = 0; i < old_space_strings_.length(); ++i) {
-    if (old_space_strings_[i] == heap_->raw_unchecked_the_hole_value()) {
+    if (old_space_strings_[i] == heap_->the_hole_value()) {
       continue;
     }
     ASSERT(!heap_->InNewSpace(old_space_strings_[i]));
     old_space_strings_[last++] = old_space_strings_[i];
   }
   old_space_strings_.Rewind(last);
+#ifdef VERIFY_HEAP
   if (FLAG_verify_heap) {
     Verify();
   }
+#endif
 }
 
 
diff --git a/deps/v8/src/heap.h b/deps/v8/src/heap.h
index cb167d30aa..72035cadcf 100644
--- a/deps/v8/src/heap.h
+++ b/deps/v8/src/heap.h
@@ -154,7 +154,9 @@ namespace internal {
   V(Smi, arguments_adaptor_deopt_pc_offset, ArgumentsAdaptorDeoptPCOffset)     \
   V(Smi, construct_stub_deopt_pc_offset, ConstructStubDeoptPCOffset)           \
   V(Smi, getter_stub_deopt_pc_offset, GetterStubDeoptPCOffset)                 \
-  V(Smi, setter_stub_deopt_pc_offset, SetterStubDeoptPCOffset)
+  V(Smi, setter_stub_deopt_pc_offset, SetterStubDeoptPCOffset)                 \
+  V(JSObject, observation_state, ObservationState)                             \
+  V(Map, external_map, ExternalMap)
 
 #define ROOT_LIST(V)                                  \
   STRONG_ROOT_LIST(V)                                 \
@@ -176,6 +178,7 @@ namespace internal {
   V(constructor_symbol, "constructor")                                   \
   V(code_symbol, ".code")                                                \
   V(result_symbol, ".result")                                            \
+  V(dot_for_symbol, ".for.")                                             \
   V(catch_var_symbol, ".catch-var")                                      \
   V(empty_symbol, "")                                                    \
   V(eval_symbol, "eval")                                                 \
@@ -283,14 +286,6 @@ class StoreBufferRebuilder {
 
 
 
-// The all static Heap captures the interface to the global object heap.
-// All JavaScript contexts by this process share the same object heap.
-
-#ifdef DEBUG
-class HeapDebugUtils;
-#endif
-
-
 // A queue of objects promoted during scavenge. Each object is accompanied
 // by it's size to avoid dereferencing a map pointer for scanning.
 class PromotionQueue {
@@ -486,6 +481,9 @@ class Heap {
   // Returns the amount of executable memory currently committed for the heap.
   intptr_t CommittedMemoryExecutable();
 
+  // Returns the amount of phyical memory currently committed for the heap.
+  size_t CommittedPhysicalMemory();
+
   // Returns the available bytes in space w/o growing.
   // Heap doesn't guarantee that it can allocate an object that requires
   // all available bytes. Check MaxHeapObjectSize() instead.
@@ -508,6 +506,24 @@ class Heap {
   MapSpace* map_space() { return map_space_; }
   CellSpace* cell_space() { return cell_space_; }
   LargeObjectSpace* lo_space() { return lo_space_; }
+  PagedSpace* paged_space(int idx) {
+    switch (idx) {
+      case OLD_POINTER_SPACE:
+        return old_pointer_space();
+      case OLD_DATA_SPACE:
+        return old_data_space();
+      case MAP_SPACE:
+        return map_space();
+      case CELL_SPACE:
+        return cell_space();
+      case CODE_SPACE:
+        return code_space();
+      case NEW_SPACE:
+      case LO_SPACE:
+        UNREACHABLE();
+    }
+    return NULL;
+  }
 
   bool always_allocate() { return always_allocate_scope_depth_ != 0; }
   Address always_allocate_scope_depth_address() {
@@ -560,6 +576,7 @@ class Heap {
   MUST_USE_RESULT MaybeObject* AllocateJSArrayWithElements(
       FixedArrayBase* array_base,
       ElementsKind elements_kind,
+      int length,
       PretenureFlag pretenure = NOT_TENURED);
 
   // Allocates and initializes a new global object based on a constructor.
@@ -642,6 +659,9 @@ class Heap {
   // Allocates a serialized scope info.
   MUST_USE_RESULT MaybeObject* AllocateScopeInfo(int length);
 
+  // Allocates an External object for v8's external API.
+  MUST_USE_RESULT MaybeObject* AllocateExternal(void* value);
+
   // Allocates an empty PolymorphicCodeCache.
   MUST_USE_RESULT MaybeObject* AllocatePolymorphicCodeCache();
 
@@ -657,6 +677,9 @@ class Heap {
   // Clear the Instanceof cache (used when a prototype changes).
   inline void ClearInstanceofCache();
 
+  // For use during bootup.
+  void RepairFreeListsAfterBoot();
+
   // Allocates and fully initializes a String.  There are two String
   // encodings: ASCII and two byte. One should choose between the three string
   // allocation functions based on the encoding of the string buffer used to
@@ -675,7 +698,7 @@ class Heap {
   // Returns Failure::RetryAfterGC(requested_bytes, space) if the allocation
   // failed.
   // Please note this does not perform a garbage collection.
-  MUST_USE_RESULT MaybeObject* AllocateStringFromAscii(
+  MUST_USE_RESULT MaybeObject* AllocateStringFromOneByte(
       Vector<const char> str,
       PretenureFlag pretenure = NOT_TENURED);
   MUST_USE_RESULT inline MaybeObject* AllocateStringFromUtf8(
@@ -683,6 +706,7 @@ class Heap {
       PretenureFlag pretenure = NOT_TENURED);
   MUST_USE_RESULT MaybeObject* AllocateStringFromUtf8Slow(
       Vector<const char> str,
+      int non_ascii_start,
       PretenureFlag pretenure = NOT_TENURED);
   MUST_USE_RESULT MaybeObject* AllocateStringFromTwoByte(
       Vector<const uc16> str,
@@ -718,7 +742,7 @@ class Heap {
   // Returns Failure::RetryAfterGC(requested_bytes, space) if the allocation
   // failed.
   // Please note this does not perform a garbage collection.
-  MUST_USE_RESULT MaybeObject* AllocateRawAsciiString(
+  MUST_USE_RESULT MaybeObject* AllocateRawOneByteString(
       int length,
       PretenureFlag pretenure = NOT_TENURED);
   MUST_USE_RESULT MaybeObject* AllocateRawTwoByteString(
@@ -1013,9 +1037,8 @@ class Heap {
     return LookupSymbol(CStrVector(str));
   }
   MUST_USE_RESULT MaybeObject* LookupSymbol(String* str);
-  MUST_USE_RESULT MaybeObject* LookupAsciiSymbol(Handle<SeqAsciiString> string,
-                                                 int from,
-                                                 int length);
+  MUST_USE_RESULT MaybeObject* LookupAsciiSymbol(
+      Handle<SeqOneByteString> string, int from, int length);
 
   bool LookupSymbolIfExists(String* str, String** symbol);
   bool LookupTwoCharsSymbolIfExists(String* str, String** symbol);
@@ -1081,7 +1104,10 @@ class Heap {
   void EnsureHeapIsIterable();
 
   // Notify the heap that a context has been disposed.
-  int NotifyContextDisposed() { return ++contexts_disposed_; }
+  int NotifyContextDisposed() {
+    flush_monomorphic_ics_ = true;
+    return ++contexts_disposed_;
+  }
 
   // Utility to invoke the scavenger. This is needed in test code to
   // ensure correct callback for weak global handles.
@@ -1239,13 +1265,15 @@ class Heap {
     return &native_contexts_list_;
   }
 
+#ifdef VERIFY_HEAP
+  // Verify the heap is in its normal state before or after a GC.
+  void Verify();
+#endif
+
 #ifdef DEBUG
   void Print();
   void PrintHandles();
 
-  // Verify the heap is in its normal state before or after a GC.
-  void Verify();
-
   void OldPointerSpaceCheckStoreBuffer();
   void MapSpaceCheckStoreBuffer();
   void LargeObjectSpaceCheckStoreBuffer();
@@ -1253,10 +1281,23 @@ class Heap {
   // Report heap statistics.
   void ReportHeapStatistics(const char* title);
   void ReportCodeStatistics(const char* title);
+#endif
+
+  // Zapping is needed for verify heap, and always done in debug builds.
+  static inline bool ShouldZapGarbage() {
+#ifdef DEBUG
+    return true;
+#else
+#ifdef VERIFY_HEAP
+    return FLAG_verify_heap;
+#else
+    return false;
+#endif
+#endif
+  }
 
   // Fill in bogus values in from space
   void ZapFromSpace();
-#endif
 
   // Print short heap statistics.
   void PrintShortHeapStatistics();
@@ -1309,20 +1350,9 @@ class Heap {
   // Commits from space if it is uncommitted.
   void EnsureFromSpaceIsCommitted();
 
-  // Support for partial snapshots.  After calling this we can allocate a
-  // certain number of bytes using only linear allocation (with a
-  // LinearAllocationScope and an AlwaysAllocateScope) without using freelists
-  // or causing a GC.  It returns true of space was reserved or false if a GC is
-  // needed.  For paged spaces the space requested must include the space wasted
-  // at the end of each page when allocating linearly.
-  void ReserveSpace(
-    int new_space_size,
-    int pointer_space_size,
-    int data_space_size,
-    int code_space_size,
-    int map_space_size,
-    int cell_space_size,
-    int large_object_size);
+  // Support for partial snapshots.  After calling this we have a linear
+  // space to write objects in each space.
+  void ReserveSpace(int *sizes, Address* addresses);
 
   //
   // Support for the API.
@@ -1418,6 +1448,10 @@ class Heap {
   STATIC_CHECK(kFalseValueRootIndex == Internals::kFalseValueRootIndex);
   STATIC_CHECK(kempty_symbolRootIndex == Internals::kEmptySymbolRootIndex);
 
+  // Generated code can embed direct references to non-writable roots if
+  // they are in new space.
+  static bool RootCanBeWrittenAfterInitialization(RootListIndex root_index);
+
   MUST_USE_RESULT MaybeObject* NumberToString(
       Object* number, bool check_number_string_cache = true);
   MUST_USE_RESULT MaybeObject* Uint32ToString(
@@ -1489,13 +1523,6 @@ class Heap {
 
   void ClearNormalizedMapCaches();
 
-  // Clears the cache of ICs related to this map.
-  void ClearCacheOnMap(Map* map) {
-    if (FLAG_cleanup_code_caches_at_gc) {
-      map->ClearCodeCache(this);
-    }
-  }
-
   GCTracer* tracer() { return tracer_; }
 
   // Returns the size of objects residing in non new spaces.
@@ -1616,6 +1643,8 @@ class Heap {
     global_ic_age_ = (global_ic_age_ + 1) & SharedFunctionInfo::ICAgeBits::kMax;
   }
 
+  bool flush_monomorphic_ics() { return flush_monomorphic_ics_; }
+
   intptr_t amount_of_external_allocated_memory() {
     return amount_of_external_allocated_memory_;
   }
@@ -1701,6 +1730,8 @@ class Heap {
 
   int global_ic_age_;
 
+  bool flush_monomorphic_ics_;
+
   int scan_on_scavenge_pages_;
 
 #if defined(V8_TARGET_ARCH_X64)
@@ -1754,8 +1785,6 @@ class Heap {
   // Do we expect to be able to handle allocation failure at this
   // time?
   bool disallow_allocation_failure_;
-
-  HeapDebugUtils* debug_utils_;
 #endif  // DEBUG
 
   // Indicates that the new space should be kept small due to high promotion
@@ -1872,7 +1901,6 @@ class Heap {
   bool PerformGarbageCollection(GarbageCollector collector,
                                 GCTracer* tracer);
 
-
   inline void UpdateOldSpaceLimits();
 
   // Allocate an uninitialized object in map space.  The behavior is identical
@@ -1899,9 +1927,9 @@ class Heap {
 
   void CreateFixedStubs();
 
-  MaybeObject* CreateOddball(const char* to_string,
-                             Object* to_number,
-                             byte kind);
+  MUST_USE_RESULT MaybeObject* CreateOddball(const char* to_string,
+                                             Object* to_number,
+                                             byte kind);
 
   // Allocate a JSArray with no elements
   MUST_USE_RESULT MaybeObject* AllocateJSArray(
@@ -2131,7 +2159,6 @@ class Heap {
   friend class GCTracer;
   friend class DisallowAllocationFailure;
   friend class AlwaysAllocateScope;
-  friend class LinearAllocationScope;
   friend class Page;
   friend class Isolate;
   friend class MarkCompactCollector;
@@ -2198,14 +2225,6 @@ class AlwaysAllocateScope {
 };
 
 
-class LinearAllocationScope {
- public:
-  inline LinearAllocationScope();
-  inline ~LinearAllocationScope();
-};
-
-
-#ifdef DEBUG
 // Visitor class to verify interior pointers in spaces that do not contain
 // or care about intergenerational references. All heap object pointers have to
 // point into the heap to a location that has a map pointer at its first word.
@@ -2215,7 +2234,6 @@ class VerifyPointersVisitor: public ObjectVisitor {
  public:
   inline void VisitPointers(Object** start, Object** end);
 };
-#endif
 
 
 // Space iterator for iterating over all spaces of the heap.
@@ -2374,7 +2392,7 @@ class KeyedLookupCache {
 };
 
 
-// Cache for mapping (array, property name) into descriptor index.
+// Cache for mapping (map, property name) into descriptor index.
 // The cache contains both positive and negative results.
 // Descriptor index equals kNotFound means the property is absent.
 // Cleared at startup and prior to any gc.
@@ -2382,21 +2400,21 @@ class DescriptorLookupCache {
  public:
   // Lookup descriptor index for (map, name).
   // If absent, kAbsent is returned.
-  int Lookup(DescriptorArray* array, String* name) {
+  int Lookup(Map* source, String* name) {
     if (!StringShape(name).IsSymbol()) return kAbsent;
-    int index = Hash(array, name);
+    int index = Hash(source, name);
     Key& key = keys_[index];
-    if ((key.array == array) && (key.name == name)) return results_[index];
+    if ((key.source == source) && (key.name == name)) return results_[index];
     return kAbsent;
   }
 
   // Update an element in the cache.
-  void Update(DescriptorArray* array, String* name, int result) {
+  void Update(Map* source, String* name, int result) {
     ASSERT(result != kAbsent);
     if (StringShape(name).IsSymbol()) {
-      int index = Hash(array, name);
+      int index = Hash(source, name);
       Key& key = keys_[index];
-      key.array = array;
+      key.source = source;
       key.name = name;
       results_[index] = result;
     }
@@ -2410,26 +2428,26 @@ class DescriptorLookupCache {
  private:
   DescriptorLookupCache() {
     for (int i = 0; i < kLength; ++i) {
-      keys_[i].array = NULL;
+      keys_[i].source = NULL;
       keys_[i].name = NULL;
       results_[i] = kAbsent;
     }
   }
 
-  static int Hash(DescriptorArray* array, String* name) {
+  static int Hash(Object* source, String* name) {
     // Uses only lower 32 bits if pointers are larger.
-    uint32_t array_hash =
-        static_cast<uint32_t>(reinterpret_cast<uintptr_t>(array))
+    uint32_t source_hash =
+        static_cast<uint32_t>(reinterpret_cast<uintptr_t>(source))
             >> kPointerSizeLog2;
     uint32_t name_hash =
         static_cast<uint32_t>(reinterpret_cast<uintptr_t>(name))
             >> kPointerSizeLog2;
-    return (array_hash ^ name_hash) % kLength;
+    return (source_hash ^ name_hash) % kLength;
   }
 
   static const int kLength = 64;
   struct Key {
-    DescriptorArray* array;
+    Map* source;
     String* name;
   };
 
@@ -2531,6 +2549,18 @@ class GCTracer BASE_EMBEDDED {
     promoted_objects_size_ += object_size;
   }
 
+  void increment_nodes_died_in_new_space() {
+    nodes_died_in_new_space_++;
+  }
+
+  void increment_nodes_copied_in_new_space() {
+    nodes_copied_in_new_space_++;
+  }
+
+  void increment_nodes_promoted() {
+    nodes_promoted_++;
+  }
+
  private:
   // Returns a string matching the collector.
   const char* CollectorString();
@@ -2575,6 +2605,15 @@ class GCTracer BASE_EMBEDDED {
   // Size of objects promoted during the current collection.
   intptr_t promoted_objects_size_;
 
+  // Number of died nodes in the new space.
+  int nodes_died_in_new_space_;
+
+  // Number of copied nodes to the new space.
+  int nodes_copied_in_new_space_;
+
+  // Number of promoted nodes to the old space.
+  int nodes_promoted_;
+
   // Incremental marking steps counters.
   int steps_count_;
   double steps_took_;
diff --git a/deps/v8/src/hydrogen-instructions.cc b/deps/v8/src/hydrogen-instructions.cc
index 0192a763f0..0e6ea00058 100644
--- a/deps/v8/src/hydrogen-instructions.cc
+++ b/deps/v8/src/hydrogen-instructions.cc
@@ -85,6 +85,81 @@ void HValue::AssumeRepresentation(Representation r) {
 }
 
 
+void HValue::InferRepresentation(HInferRepresentation* h_infer) {
+  ASSERT(CheckFlag(kFlexibleRepresentation));
+  Representation new_rep = RepresentationFromInputs();
+  UpdateRepresentation(new_rep, h_infer, "inputs");
+  new_rep = RepresentationFromUses();
+  UpdateRepresentation(new_rep, h_infer, "uses");
+}
+
+
+Representation HValue::RepresentationFromUses() {
+  if (HasNoUses()) return Representation::None();
+
+  // Array of use counts for each representation.
+  int use_count[Representation::kNumRepresentations] = { 0 };
+
+  for (HUseIterator it(uses()); !it.Done(); it.Advance()) {
+    HValue* use = it.value();
+    Representation rep = use->observed_input_representation(it.index());
+    if (rep.IsNone()) continue;
+    if (FLAG_trace_representation) {
+      PrintF("#%d %s is used by #%d %s as %s%s\n",
+             id(), Mnemonic(), use->id(), use->Mnemonic(), rep.Mnemonic(),
+             (use->CheckFlag(kTruncatingToInt32) ? "-trunc" : ""));
+    }
+    use_count[rep.kind()] += use->LoopWeight();
+  }
+  if (IsPhi()) HPhi::cast(this)->AddIndirectUsesTo(&use_count[0]);
+  int tagged_count = use_count[Representation::kTagged];
+  int double_count = use_count[Representation::kDouble];
+  int int32_count = use_count[Representation::kInteger32];
+
+  if (tagged_count > 0) return Representation::Tagged();
+  if (double_count > 0) return Representation::Double();
+  if (int32_count > 0) return Representation::Integer32();
+
+  return Representation::None();
+}
+
+
+void HValue::UpdateRepresentation(Representation new_rep,
+                                  HInferRepresentation* h_infer,
+                                  const char* reason) {
+  Representation r = representation();
+  if (new_rep.is_more_general_than(r)) {
+    // When an HConstant is marked "not convertible to integer", then
+    // never try to represent it as an integer.
+    if (new_rep.IsInteger32() && !IsConvertibleToInteger()) {
+      new_rep = Representation::Tagged();
+      if (FLAG_trace_representation) {
+        PrintF("Changing #%d %s representation %s -> %s because it's NCTI"
+               " (%s want i)\n",
+               id(), Mnemonic(), r.Mnemonic(), new_rep.Mnemonic(), reason);
+      }
+    } else {
+      if (FLAG_trace_representation) {
+        PrintF("Changing #%d %s representation %s -> %s based on %s\n",
+               id(), Mnemonic(), r.Mnemonic(), new_rep.Mnemonic(), reason);
+      }
+    }
+    ChangeRepresentation(new_rep);
+    AddDependantsToWorklist(h_infer);
+  }
+}
+
+
+void HValue::AddDependantsToWorklist(HInferRepresentation* h_infer) {
+  for (HUseIterator it(uses()); !it.Done(); it.Advance()) {
+    h_infer->AddToWorklist(it.value());
+  }
+  for (int i = 0; i < OperandCount(); ++i) {
+    h_infer->AddToWorklist(OperandAt(i));
+  }
+}
+
+
 static int32_t ConvertAndSetOverflow(int64_t result, bool* overflow) {
   if (result > kMaxInt) {
     *overflow = true;
@@ -301,6 +376,7 @@ HUseListNode* HUseListNode::tail() {
 
 bool HValue::CheckUsesForFlag(Flag f) {
   for (HUseIterator it(uses()); !it.Done(); it.Advance()) {
+    if (it.value()->IsSimulate()) continue;
     if (!it.value()->CheckFlag(f)) return false;
   }
   return true;
@@ -707,7 +783,7 @@ void HCallGlobal::PrintDataTo(StringStream* stream) {
 
 
 void HCallKnownGlobal::PrintDataTo(StringStream* stream) {
-  stream->Add("o ", target()->shared()->DebugName());
+  stream->Add("%o ", target()->shared()->DebugName());
   stream->Add("#%d", argument_count());
 }
 
@@ -764,6 +840,24 @@ void HReturn::PrintDataTo(StringStream* stream) {
 }
 
 
+Representation HBranch::observed_input_representation(int index) {
+  static const ToBooleanStub::Types tagged_types(
+      ToBooleanStub::UNDEFINED |
+      ToBooleanStub::NULL_TYPE |
+      ToBooleanStub::SPEC_OBJECT |
+      ToBooleanStub::STRING);
+  if (expected_input_types_.ContainsAnyOf(tagged_types)) {
+    return Representation::Tagged();
+  } else if (expected_input_types_.Contains(ToBooleanStub::HEAP_NUMBER)) {
+    return Representation::Double();
+  } else if (expected_input_types_.Contains(ToBooleanStub::SMI)) {
+    return Representation::Integer32();
+  } else {
+    return Representation::None();
+  }
+}
+
+
 void HCompareMap::PrintDataTo(StringStream* stream) {
   value()->PrintNameTo(stream);
   stream->Add(" (%p)", *map());
@@ -859,16 +953,6 @@ void HLoadFieldByIndex::PrintDataTo(StringStream* stream) {
 }
 
 
-HValue* HConstant::Canonicalize() {
-  return HasNoUses() ? NULL : this;
-}
-
-
-HValue* HTypeof::Canonicalize() {
-  return HasNoUses() ? NULL : this;
-}
-
-
 HValue* HBitwise::Canonicalize() {
   if (!representation().IsInteger32()) return this;
   // If x is an int32, then x & -1 == x, x | 0 == x and x ^ 0 == x.
@@ -1058,6 +1142,13 @@ void HCheckInstanceType::GetCheckMaskAndTag(uint8_t* mask, uint8_t* tag) {
 }
 
 
+void HLoadElements::PrintDataTo(StringStream* stream) {
+  value()->PrintNameTo(stream);
+  stream->Add(" ");
+  typecheck()->PrintNameTo(stream);
+}
+
+
 void HCheckMaps::PrintDataTo(StringStream* stream) {
   value()->PrintNameTo(stream);
   stream->Add(" [%p", *map_set()->first());
@@ -1342,15 +1433,11 @@ void HPhi::InitRealUses(int phi_id) {
   for (HUseIterator it(uses()); !it.Done(); it.Advance()) {
     HValue* value = it.value();
     if (!value->IsPhi()) {
-      Representation rep = value->ObservedInputRepresentation(it.index());
+      Representation rep = value->observed_input_representation(it.index());
       non_phi_uses_[rep.kind()] += value->LoopWeight();
       if (FLAG_trace_representation) {
-        PrintF("%d %s is used by %d %s as %s\n",
-               this->id(),
-               this->Mnemonic(),
-               value->id(),
-               value->Mnemonic(),
-               rep.Mnemonic());
+        PrintF("#%d Phi is used by real #%d %s as %s\n",
+               id(), value->id(), value->Mnemonic(), rep.Mnemonic());
       }
     }
   }
@@ -1359,11 +1446,8 @@ void HPhi::InitRealUses(int phi_id) {
 
 void HPhi::AddNonPhiUsesFrom(HPhi* other) {
   if (FLAG_trace_representation) {
-    PrintF("adding to %d %s uses of %d %s: i%d d%d t%d\n",
-           this->id(),
-           this->Mnemonic(),
-           other->id(),
-           other->Mnemonic(),
+    PrintF("adding to #%d Phi uses of #%d Phi: i%d d%d t%d\n",
+           id(), other->id(),
            other->non_phi_uses_[Representation::kInteger32],
            other->non_phi_uses_[Representation::kDouble],
            other->non_phi_uses_[Representation::kTagged]);
@@ -1382,9 +1466,20 @@ void HPhi::AddIndirectUsesTo(int* dest) {
 }
 
 
-void HPhi::ResetInteger32Uses() {
-  non_phi_uses_[Representation::kInteger32] = 0;
-  indirect_uses_[Representation::kInteger32] = 0;
+void HSimulate::MergeInto(HSimulate* other) {
+  for (int i = 0; i < values_.length(); ++i) {
+    HValue* value = values_[i];
+    if (HasAssignedIndexAt(i)) {
+      other->AddAssignedValue(GetAssignedIndexAt(i), value);
+    } else {
+      if (other->pop_count_ > 0) {
+        other->pop_count_--;
+      } else {
+        other->AddPushedValue(value);
+      }
+    }
+  }
+  other->pop_count_ += pop_count();
 }
 
 
@@ -1393,7 +1488,7 @@ void HSimulate::PrintDataTo(StringStream* stream) {
   if (pop_count_ > 0) stream->Add(" pop %d", pop_count_);
   if (values_.length() > 0) {
     if (pop_count_ > 0) stream->Add(" /");
-    for (int i = 0; i < values_.length(); ++i) {
+    for (int i = values_.length() - 1; i >= 0; --i) {
       if (i > 0) stream->Add(",");
       if (HasAssignedIndexAt(i)) {
         stream->Add(" var[%d] = ", GetAssignedIndexAt(i));
@@ -1432,7 +1527,6 @@ HConstant::HConstant(Handle<Object> handle, Representation r)
     : handle_(handle),
       has_int32_value_(false),
       has_double_value_(false) {
-  set_representation(r);
   SetFlag(kUseGVN);
   if (handle_->IsNumber()) {
     double n = handle_->Number();
@@ -1441,6 +1535,16 @@ HConstant::HConstant(Handle<Object> handle, Representation r)
     double_value_ = n;
     has_double_value_ = true;
   }
+  if (r.IsNone()) {
+    if (has_int32_value_) {
+      r = Representation::Integer32();
+    } else if (has_double_value_) {
+      r = Representation::Double();
+    } else {
+      r = Representation::Tagged();
+    }
+  }
+  set_representation(r);
 }
 
 
@@ -1539,6 +1643,60 @@ void HBinaryOperation::PrintDataTo(StringStream* stream) {
 }
 
 
+void HBinaryOperation::InferRepresentation(HInferRepresentation* h_infer) {
+  ASSERT(CheckFlag(kFlexibleRepresentation));
+  Representation new_rep = RepresentationFromInputs();
+  UpdateRepresentation(new_rep, h_infer, "inputs");
+  // When the operation has information about its own output type, don't look
+  // at uses.
+  if (!observed_output_representation_.IsNone()) return;
+  new_rep = RepresentationFromUses();
+  UpdateRepresentation(new_rep, h_infer, "uses");
+}
+
+
+Representation HBinaryOperation::RepresentationFromInputs() {
+  // Determine the worst case of observed input representations and
+  // the currently assumed output representation.
+  Representation rep = representation();
+  if (observed_output_representation_.is_more_general_than(rep)) {
+    rep = observed_output_representation_;
+  }
+  for (int i = 1; i <= 2; ++i) {
+    Representation input_rep = observed_input_representation(i);
+    if (input_rep.is_more_general_than(rep)) rep = input_rep;
+  }
+  // If any of the actual input representation is more general than what we
+  // have so far but not Tagged, use that representation instead.
+  Representation left_rep = left()->representation();
+  Representation right_rep = right()->representation();
+
+  if (left_rep.is_more_general_than(rep) &&
+      left()->CheckFlag(kFlexibleRepresentation)) {
+    rep = left_rep;
+  }
+  if (right_rep.is_more_general_than(rep) &&
+      right()->CheckFlag(kFlexibleRepresentation)) {
+    rep = right_rep;
+  }
+  return rep;
+}
+
+
+void HBinaryOperation::AssumeRepresentation(Representation r) {
+  set_observed_input_representation(r, r);
+  HValue::AssumeRepresentation(r);
+}
+
+
+void HMathMinMax::InferRepresentation(HInferRepresentation* h_infer) {
+  ASSERT(CheckFlag(kFlexibleRepresentation));
+  Representation new_rep = RepresentationFromInputs();
+  UpdateRepresentation(new_rep, h_infer, "inputs");
+  // Do not care about uses.
+}
+
+
 Range* HBitwise::InferRange(Zone* zone) {
   if (op() == Token::BIT_XOR) return HValue::InferRange(zone);
   const int32_t kDefaultMask = static_cast<int32_t>(0xffffffff);
@@ -1615,7 +1773,7 @@ Range* HShl::InferRange(Zone* zone) {
 }
 
 
-Range* HLoadKeyedSpecializedArrayElement::InferRange(Zone* zone) {
+Range* HLoadKeyed::InferRange(Zone* zone) {
   switch (elements_kind()) {
     case EXTERNAL_PIXEL_ELEMENTS:
       return new(zone) Range(0, 255);
@@ -1670,9 +1828,19 @@ void HGoto::PrintDataTo(StringStream* stream) {
 }
 
 
-void HCompareIDAndBranch::SetInputRepresentation(Representation r) {
-  input_representation_ = r;
-  if (r.IsDouble()) {
+void HCompareIDAndBranch::InferRepresentation(HInferRepresentation* h_infer) {
+  Representation rep = Representation::None();
+  Representation left_rep = left()->representation();
+  Representation right_rep = right()->representation();
+  bool observed_integers =
+      observed_input_representation(0).IsInteger32() &&
+      observed_input_representation(1).IsInteger32();
+  bool inputs_are_not_doubles =
+      !left_rep.IsDouble() && !right_rep.IsDouble();
+  if (observed_integers && inputs_are_not_doubles) {
+    rep = Representation::Integer32();
+  } else {
+    rep = Representation::Double();
     // According to the ES5 spec (11.9.3, 11.8.5), Equality comparisons (==, ===
     // and !=) have special handling of undefined, e.g. undefined == undefined
     // is 'true'. Relational comparisons have a different semantic, first
@@ -1689,9 +1857,8 @@ void HCompareIDAndBranch::SetInputRepresentation(Representation r) {
     if (!Token::IsOrderedRelationalCompareOp(token_)) {
       SetFlag(kDeoptimizeOnUndefined);
     }
-  } else {
-    ASSERT(r.IsInteger32());
   }
+  ChangeRepresentation(rep);
 }
 
 
@@ -1842,11 +2009,25 @@ void HLoadNamedGeneric::PrintDataTo(StringStream* stream) {
 }
 
 
-void HLoadKeyedFastElement::PrintDataTo(StringStream* stream) {
-  object()->PrintNameTo(stream);
+void HLoadKeyed::PrintDataTo(StringStream* stream) {
+  if (!is_external()) {
+    elements()->PrintNameTo(stream);
+  } else {
+    ASSERT(elements_kind() >= FIRST_EXTERNAL_ARRAY_ELEMENTS_KIND &&
+           elements_kind() <= LAST_EXTERNAL_ARRAY_ELEMENTS_KIND);
+    elements()->PrintNameTo(stream);
+    stream->Add(".");
+    stream->Add(ElementsKindToString(elements_kind()));
+  }
+
   stream->Add("[");
   key()->PrintNameTo(stream);
-  stream->Add("] ");
+  if (IsDehoisted()) {
+    stream->Add(" + %d] ", index_offset());
+  } else {
+    stream->Add("] ");
+  }
+
   dependency()->PrintNameTo(stream);
   if (RequiresHoleCheck()) {
     stream->Add(" check_hole");
@@ -1854,29 +2035,26 @@ void HLoadKeyedFastElement::PrintDataTo(StringStream* stream) {
 }
 
 
-bool HLoadKeyedFastElement::RequiresHoleCheck() {
+bool HLoadKeyed::RequiresHoleCheck() const {
   if (IsFastPackedElementsKind(elements_kind())) {
     return false;
   }
 
+  if (IsFastDoubleElementsKind(elements_kind())) {
+    return true;
+  }
+
   for (HUseIterator it(uses()); !it.Done(); it.Advance()) {
     HValue* use = it.value();
-    if (!use->IsChange()) return true;
+    if (!use->IsChange()) {
+      return true;
+    }
   }
 
   return false;
 }
 
 
-void HLoadKeyedFastDoubleElement::PrintDataTo(StringStream* stream) {
-  elements()->PrintNameTo(stream);
-  stream->Add("[");
-  key()->PrintNameTo(stream);
-  stream->Add("] ");
-  dependency()->PrintNameTo(stream);
-}
-
-
 void HLoadKeyedGeneric::PrintDataTo(StringStream* stream) {
   object()->PrintNameTo(stream);
   stream->Add("[");
@@ -1889,21 +2067,22 @@ HValue* HLoadKeyedGeneric::Canonicalize() {
   // Recognize generic keyed loads that use property name generated
   // by for-in statement as a key and rewrite them into fast property load
   // by index.
-  if (key()->IsLoadKeyedFastElement()) {
-    HLoadKeyedFastElement* key_load = HLoadKeyedFastElement::cast(key());
-    if (key_load->object()->IsForInCacheArray()) {
+  if (key()->IsLoadKeyed()) {
+    HLoadKeyed* key_load = HLoadKeyed::cast(key());
+    if (key_load->elements()->IsForInCacheArray()) {
       HForInCacheArray* names_cache =
-          HForInCacheArray::cast(key_load->object());
+          HForInCacheArray::cast(key_load->elements());
 
       if (names_cache->enumerable() == object()) {
         HForInCacheArray* index_cache =
             names_cache->index_cache();
         HCheckMapValue* map_check =
             new(block()->zone()) HCheckMapValue(object(), names_cache->map());
-        HInstruction* index = new(block()->zone()) HLoadKeyedFastElement(
+        HInstruction* index = new(block()->zone()) HLoadKeyed(
             index_cache,
             key_load->key(),
-            key_load->key());
+            key_load->key(),
+            key_load->elements_kind());
         map_check->InsertBefore(this);
         index->InsertBefore(this);
         HLoadFieldByIndex* load = new(block()->zone()) HLoadFieldByIndex(
@@ -1918,56 +2097,6 @@ HValue* HLoadKeyedGeneric::Canonicalize() {
 }
 
 
-void HLoadKeyedSpecializedArrayElement::PrintDataTo(
-    StringStream* stream) {
-  external_pointer()->PrintNameTo(stream);
-  stream->Add(".");
-  switch (elements_kind()) {
-    case EXTERNAL_BYTE_ELEMENTS:
-      stream->Add("byte");
-      break;
-    case EXTERNAL_UNSIGNED_BYTE_ELEMENTS:
-      stream->Add("u_byte");
-      break;
-    case EXTERNAL_SHORT_ELEMENTS:
-      stream->Add("short");
-      break;
-    case EXTERNAL_UNSIGNED_SHORT_ELEMENTS:
-      stream->Add("u_short");
-      break;
-    case EXTERNAL_INT_ELEMENTS:
-      stream->Add("int");
-      break;
-    case EXTERNAL_UNSIGNED_INT_ELEMENTS:
-      stream->Add("u_int");
-      break;
-    case EXTERNAL_FLOAT_ELEMENTS:
-      stream->Add("float");
-      break;
-    case EXTERNAL_DOUBLE_ELEMENTS:
-      stream->Add("double");
-      break;
-    case EXTERNAL_PIXEL_ELEMENTS:
-      stream->Add("pixel");
-      break;
-    case FAST_ELEMENTS:
-    case FAST_SMI_ELEMENTS:
-    case FAST_DOUBLE_ELEMENTS:
-    case FAST_HOLEY_ELEMENTS:
-    case FAST_HOLEY_SMI_ELEMENTS:
-    case FAST_HOLEY_DOUBLE_ELEMENTS:
-    case DICTIONARY_ELEMENTS:
-    case NON_STRICT_ARGUMENTS_ELEMENTS:
-      UNREACHABLE();
-      break;
-  }
-  stream->Add("[");
-  key()->PrintNameTo(stream);
-  stream->Add("] ");
-  dependency()->PrintNameTo(stream);
-}
-
-
 void HStoreNamedGeneric::PrintDataTo(StringStream* stream) {
   object()->PrintNameTo(stream);
   stream->Add(".");
@@ -1994,20 +2123,25 @@ void HStoreNamedField::PrintDataTo(StringStream* stream) {
 }
 
 
-void HStoreKeyedFastElement::PrintDataTo(StringStream* stream) {
-  object()->PrintNameTo(stream);
-  stream->Add("[");
-  key()->PrintNameTo(stream);
-  stream->Add("] = ");
-  value()->PrintNameTo(stream);
-}
-
+void HStoreKeyed::PrintDataTo(StringStream* stream) {
+  if (!is_external()) {
+    elements()->PrintNameTo(stream);
+  } else {
+    elements()->PrintNameTo(stream);
+    stream->Add(".");
+    stream->Add(ElementsKindToString(elements_kind()));
+    ASSERT(elements_kind() >= FIRST_EXTERNAL_ARRAY_ELEMENTS_KIND &&
+           elements_kind() <= LAST_EXTERNAL_ARRAY_ELEMENTS_KIND);
+  }
 
-void HStoreKeyedFastDoubleElement::PrintDataTo(StringStream* stream) {
-  elements()->PrintNameTo(stream);
   stream->Add("[");
   key()->PrintNameTo(stream);
-  stream->Add("] = ");
+  if (IsDehoisted()) {
+    stream->Add(" + %d] = ", index_offset());
+  } else {
+    stream->Add("] = ");
+  }
+
   value()->PrintNameTo(stream);
 }
 
@@ -2021,56 +2155,6 @@ void HStoreKeyedGeneric::PrintDataTo(StringStream* stream) {
 }
 
 
-void HStoreKeyedSpecializedArrayElement::PrintDataTo(
-    StringStream* stream) {
-  external_pointer()->PrintNameTo(stream);
-  stream->Add(".");
-  switch (elements_kind()) {
-    case EXTERNAL_BYTE_ELEMENTS:
-      stream->Add("byte");
-      break;
-    case EXTERNAL_UNSIGNED_BYTE_ELEMENTS:
-      stream->Add("u_byte");
-      break;
-    case EXTERNAL_SHORT_ELEMENTS:
-      stream->Add("short");
-      break;
-    case EXTERNAL_UNSIGNED_SHORT_ELEMENTS:
-      stream->Add("u_short");
-      break;
-    case EXTERNAL_INT_ELEMENTS:
-      stream->Add("int");
-      break;
-    case EXTERNAL_UNSIGNED_INT_ELEMENTS:
-      stream->Add("u_int");
-      break;
-    case EXTERNAL_FLOAT_ELEMENTS:
-      stream->Add("float");
-      break;
-    case EXTERNAL_DOUBLE_ELEMENTS:
-      stream->Add("double");
-      break;
-    case EXTERNAL_PIXEL_ELEMENTS:
-      stream->Add("pixel");
-      break;
-    case FAST_SMI_ELEMENTS:
-    case FAST_ELEMENTS:
-    case FAST_DOUBLE_ELEMENTS:
-    case FAST_HOLEY_SMI_ELEMENTS:
-    case FAST_HOLEY_ELEMENTS:
-    case FAST_HOLEY_DOUBLE_ELEMENTS:
-    case DICTIONARY_ELEMENTS:
-    case NON_STRICT_ARGUMENTS_ELEMENTS:
-      UNREACHABLE();
-      break;
-  }
-  stream->Add("[");
-  key()->PrintNameTo(stream);
-  stream->Add("] = ");
-  value()->PrintNameTo(stream);
-}
-
-
 void HTransitionElementsKind::PrintDataTo(StringStream* stream) {
   object()->PrintNameTo(stream);
   ElementsKind from_kind = original_map()->elements_kind();
@@ -2090,7 +2174,7 @@ void HLoadGlobalCell::PrintDataTo(StringStream* stream) {
 }
 
 
-bool HLoadGlobalCell::RequiresHoleCheck() {
+bool HLoadGlobalCell::RequiresHoleCheck() const {
   if (details_.IsDontDelete() && !details_.IsReadOnly()) return false;
   for (HUseIterator it(uses()); !it.Done(); it.Advance()) {
     HValue* use = it.value();
@@ -2361,10 +2445,10 @@ HValue* HAdd::EnsureAndPropagateNotMinusZero(BitVector* visited) {
 }
 
 
-bool HStoreKeyedFastDoubleElement::NeedsCanonicalization() {
-  // If value was loaded from unboxed double backing store or
-  // converted from an integer then we don't have to canonicalize it.
-  if (value()->IsLoadKeyedFastDoubleElement() ||
+bool HStoreKeyed::NeedsCanonicalization() {
+  // If value is an integer or comes from the result of a keyed load
+  // then it will be a non-hole value: no need for canonicalization.
+  if (value()->IsLoadKeyed() ||
       (value()->IsChange() && HChange::cast(value())->from().IsInteger32())) {
     return false;
   }
@@ -2547,7 +2631,41 @@ void HBitwise::PrintDataTo(StringStream* stream) {
 }
 
 
-Representation HPhi::InferredRepresentation() {
+void HPhi::InferRepresentation(HInferRepresentation* h_infer) {
+  ASSERT(CheckFlag(kFlexibleRepresentation));
+  // If there are non-Phi uses, and all of them have observed the same
+  // representation, than that's what this Phi is going to use.
+  Representation new_rep = RepresentationObservedByAllNonPhiUses();
+  if (!new_rep.IsNone()) {
+    UpdateRepresentation(new_rep, h_infer, "unanimous use observations");
+    return;
+  }
+  new_rep = RepresentationFromInputs();
+  UpdateRepresentation(new_rep, h_infer, "inputs");
+  new_rep = RepresentationFromUses();
+  UpdateRepresentation(new_rep, h_infer, "uses");
+  new_rep = RepresentationFromUseRequirements();
+  UpdateRepresentation(new_rep, h_infer, "use requirements");
+}
+
+
+Representation HPhi::RepresentationObservedByAllNonPhiUses() {
+  int non_phi_use_count = 0;
+  for (int i = Representation::kInteger32;
+       i < Representation::kNumRepresentations; ++i) {
+    non_phi_use_count += non_phi_uses_[i];
+  }
+  if (non_phi_use_count <= 1) return Representation::None();
+  for (int i = 0; i < Representation::kNumRepresentations; ++i) {
+    if (non_phi_uses_[i] == non_phi_use_count) {
+      return Representation::FromKind(static_cast<Representation::Kind>(i));
+    }
+  }
+  return Representation::None();
+}
+
+
+Representation HPhi::RepresentationFromInputs() {
   bool double_occurred = false;
   bool int32_occurred = false;
   for (int i = 0; i < OperandCount(); ++i) {
@@ -2556,6 +2674,7 @@ Representation HPhi::InferredRepresentation() {
       HPhi* hint_value = HUnknownOSRValue::cast(value)->incoming_value();
       if (hint_value != NULL) {
         Representation hint = hint_value->representation();
+        if (hint.IsTagged()) return hint;
         if (hint.IsDouble()) double_occurred = true;
         if (hint.IsInteger32()) int32_occurred = true;
       }
@@ -2574,7 +2693,9 @@ Representation HPhi::InferredRepresentation() {
           return Representation::Tagged();
         }
       } else {
-        return Representation::Tagged();
+        if (value->IsPhi() && !IsConvertibleToInteger()) {
+          return Representation::Tagged();
+        }
       }
     }
   }
@@ -2587,6 +2708,37 @@ Representation HPhi::InferredRepresentation() {
 }
 
 
+Representation HPhi::RepresentationFromUseRequirements() {
+  Representation all_uses_require = Representation::None();
+  bool all_uses_require_the_same = true;
+  for (HUseIterator it(uses()); !it.Done(); it.Advance()) {
+    // We check for observed_input_representation elsewhere.
+    Representation use_rep =
+        it.value()->RequiredInputRepresentation(it.index());
+    // No useful info from this use -> look at the next one.
+    if (use_rep.IsNone()) {
+      continue;
+    }
+    if (use_rep.Equals(all_uses_require)) {
+      continue;
+    }
+    // This use's representation contradicts what we've seen so far.
+    if (!all_uses_require.IsNone()) {
+      ASSERT(!use_rep.Equals(all_uses_require));
+      all_uses_require_the_same = false;
+      break;
+    }
+    // Otherwise, initialize observed representation.
+    all_uses_require = use_rep;
+  }
+  if (all_uses_require_the_same) {
+    return all_uses_require;
+  }
+
+  return Representation::None();
+}
+
+
 // Node-specific verification code is only included in debug mode.
 #ifdef DEBUG
 
@@ -2625,12 +2777,6 @@ void HCheckFunction::Verify() {
   ASSERT(HasNoUses());
 }
 
-
-void HCheckPrototypeMaps::Verify() {
-  HInstruction::Verify();
-  ASSERT(HasNoUses());
-}
-
 #endif
 
 } }  // namespace v8::internal
diff --git a/deps/v8/src/hydrogen-instructions.h b/deps/v8/src/hydrogen-instructions.h
index 6c938cd4bf..161e6542d9 100644
--- a/deps/v8/src/hydrogen-instructions.h
+++ b/deps/v8/src/hydrogen-instructions.h
@@ -45,6 +45,7 @@ namespace internal {
 // Forward declarations.
 class HBasicBlock;
 class HEnvironment;
+class HInferRepresentation;
 class HInstruction;
 class HLoopInformation;
 class HValue;
@@ -53,6 +54,7 @@ class LChunkBuilder;
 
 
 #define HYDROGEN_ABSTRACT_INSTRUCTION_LIST(V)  \
+  V(BinaryOperation)                           \
   V(BitwiseBinaryOperation)                    \
   V(ControlInstruction)                        \
   V(Instruction)                               \
@@ -132,10 +134,8 @@ class LChunkBuilder;
   V(LoadFunctionPrototype)                     \
   V(LoadGlobalCell)                            \
   V(LoadGlobalGeneric)                         \
-  V(LoadKeyedFastDoubleElement)                \
-  V(LoadKeyedFastElement)                      \
+  V(LoadKeyed)                                 \
   V(LoadKeyedGeneric)                          \
-  V(LoadKeyedSpecializedArrayElement)          \
   V(LoadNamedField)                            \
   V(LoadNamedFieldPolymorphic)                 \
   V(LoadNamedGeneric)                          \
@@ -153,7 +153,9 @@ class LChunkBuilder;
   V(Random)                                    \
   V(RegExpLiteral)                             \
   V(Return)                                    \
+  V(Ror)                                       \
   V(Sar)                                       \
+  V(SeqStringSetChar)                          \
   V(Shl)                                       \
   V(Shr)                                       \
   V(Simulate)                                  \
@@ -162,10 +164,8 @@ class LChunkBuilder;
   V(StoreContextSlot)                          \
   V(StoreGlobalCell)                           \
   V(StoreGlobalGeneric)                        \
-  V(StoreKeyedFastDoubleElement)               \
-  V(StoreKeyedFastElement)                     \
+  V(StoreKeyed)                                \
   V(StoreKeyedGeneric)                         \
-  V(StoreKeyedSpecializedArrayElement)         \
   V(StoreNamedField)                           \
   V(StoreNamedGeneric)                         \
   V(StringAdd)                                 \
@@ -310,9 +310,9 @@ class Representation {
  public:
   enum Kind {
     kNone,
-    kTagged,
-    kDouble,
     kInteger32,
+    kDouble,
+    kTagged,
     kExternal,
     kNumRepresentations
   };
@@ -325,10 +325,18 @@ class Representation {
   static Representation Double() { return Representation(kDouble); }
   static Representation External() { return Representation(kExternal); }
 
+  static Representation FromKind(Kind kind) { return Representation(kind); }
+
   bool Equals(const Representation& other) {
     return kind_ == other.kind_;
   }
 
+  bool is_more_general_than(const Representation& other) {
+    ASSERT(kind_ != kExternal);
+    ASSERT(other.kind_ != kExternal);
+    return kind_ > other.kind_;
+  }
+
   Kind kind() const { return static_cast<Kind>(kind_); }
   bool IsNone() const { return kind_ == kNone; }
   bool IsTagged() const { return kind_ == kTagged; }
@@ -631,13 +639,15 @@ class HValue: public ZoneObject {
   virtual bool EmitAtUses() { return false; }
   Representation representation() const { return representation_; }
   void ChangeRepresentation(Representation r) {
-    // Representation was already set and is allowed to be changed.
-    ASSERT(!r.IsNone());
     ASSERT(CheckFlag(kFlexibleRepresentation));
     RepresentationChanged(r);
     representation_ = r;
+    if (r.IsTagged()) {
+      // Tagged is the bottom of the lattice, don't go any further.
+      ClearFlag(kFlexibleRepresentation);
+    }
   }
-  void AssumeRepresentation(Representation r);
+  virtual void AssumeRepresentation(Representation r);
 
   virtual bool IsConvertibleToInteger() const { return true; }
 
@@ -666,7 +676,7 @@ class HValue: public ZoneObject {
 
   // Operands.
   virtual int OperandCount() = 0;
-  virtual HValue* OperandAt(int index) = 0;
+  virtual HValue* OperandAt(int index) const = 0;
   void SetOperandAt(int index, HValue* value);
 
   void DeleteAndReplaceWith(HValue* other);
@@ -735,16 +745,11 @@ class HValue: public ZoneObject {
   void ComputeInitialRange(Zone* zone);
 
   // Representation helpers.
-  virtual Representation RequiredInputRepresentation(int index) = 0;
-
-  virtual Representation InferredRepresentation() {
-    return representation();
-  }
-
-  // Type feedback access.
-  virtual Representation ObservedInputRepresentation(int index) {
-    return RequiredInputRepresentation(index);
+  virtual Representation observed_input_representation(int index) {
+    return Representation::None();
   }
+  virtual Representation RequiredInputRepresentation(int index) = 0;
+  virtual void InferRepresentation(HInferRepresentation* h_infer);
 
   // This gives the instruction an opportunity to replace itself with an
   // instruction that does the same in some better way.  To replace an
@@ -777,6 +782,10 @@ class HValue: public ZoneObject {
     UNREACHABLE();
   }
 
+  bool IsDead() const {
+    return HasNoUses() && !HasObservableSideEffects() && IsDeletable();
+  }
+
 #ifdef DEBUG
   virtual void Verify() = 0;
 #endif
@@ -788,7 +797,18 @@ class HValue: public ZoneObject {
     UNREACHABLE();
     return false;
   }
+
+  virtual Representation RepresentationFromInputs() {
+    return representation();
+  }
+  Representation RepresentationFromUses();
+  virtual void UpdateRepresentation(Representation new_rep,
+                                    HInferRepresentation* h_infer,
+                                    const char* reason);
+  void AddDependantsToWorklist(HInferRepresentation* h_infer);
+
   virtual void RepresentationChanged(Representation to) { }
+
   virtual Range* InferRange(Zone* zone);
   virtual void DeleteFromGraph() = 0;
   virtual void InternalSetOperandAt(int index, HValue* value) = 0;
@@ -798,7 +818,6 @@ class HValue: public ZoneObject {
   }
 
   void set_representation(Representation r) {
-    // Representation is set-once.
     ASSERT(representation_.IsNone() && !r.IsNone());
     representation_ = r;
   }
@@ -861,6 +880,8 @@ class HValue: public ZoneObject {
   GVNFlagSet gvn_flags_;
 
  private:
+  virtual bool IsDeletable() const { return false; }
+
   DISALLOW_COPY_AND_ASSIGN(HValue);
 };
 
@@ -929,7 +950,7 @@ template<int V>
 class HTemplateInstruction : public HInstruction {
  public:
   int OperandCount() { return V; }
-  HValue* OperandAt(int i) { return inputs_[i]; }
+  HValue* OperandAt(int i) const { return inputs_[i]; }
 
  protected:
   void InternalSetOperandAt(int i, HValue* value) { inputs_[i] = value; }
@@ -981,7 +1002,7 @@ class HTemplateControlInstruction: public HControlInstruction {
   void SetSuccessorAt(int i, HBasicBlock* block) { successors_[i] = block; }
 
   int OperandCount() { return V; }
-  HValue* OperandAt(int i) { return inputs_[i]; }
+  HValue* OperandAt(int i) const { return inputs_[i]; }
 
 
  protected:
@@ -1026,7 +1047,7 @@ class HDeoptimize: public HControlInstruction {
   }
 
   virtual int OperandCount() { return values_.length(); }
-  virtual HValue* OperandAt(int index) { return values_[index]; }
+  virtual HValue* OperandAt(int index) const { return values_[index]; }
   virtual void PrintDataTo(StringStream* stream);
 
   virtual int SuccessorCount() { return 0; }
@@ -1109,6 +1130,7 @@ class HBranch: public HUnaryControlInstruction {
   virtual Representation RequiredInputRepresentation(int index) {
     return Representation::None();
   }
+  virtual Representation observed_input_representation(int index);
 
   ToBooleanStub::Types expected_input_types() const {
     return expected_input_types_;
@@ -1187,7 +1209,7 @@ class HUnaryOperation: public HTemplateInstruction<1> {
     return reinterpret_cast<HUnaryOperation*>(value);
   }
 
-  HValue* value() { return OperandAt(0); }
+  HValue* value() const { return OperandAt(0); }
   virtual void PrintDataTo(StringStream* stream);
 };
 
@@ -1263,8 +1285,8 @@ class HChange: public HUnaryOperation {
   virtual HType CalculateInferredType();
   virtual HValue* Canonicalize();
 
-  Representation from() { return value()->representation(); }
-  Representation to() { return representation(); }
+  Representation from() const { return value()->representation(); }
+  Representation to() const { return representation(); }
   bool deoptimize_on_undefined() const {
     return CheckFlag(kDeoptimizeOnUndefined);
   }
@@ -1283,6 +1305,11 @@ class HChange: public HUnaryOperation {
 
  protected:
   virtual bool DataEquals(HValue* other) { return true; }
+
+ private:
+  virtual bool IsDeletable() const {
+    return !from().IsTagged() || value()->type().IsSmi();
+  }
 };
 
 
@@ -1302,17 +1329,30 @@ class HClampToUint8: public HUnaryOperation {
 
  protected:
   virtual bool DataEquals(HValue* other) { return true; }
+
+ private:
+  virtual bool IsDeletable() const { return true; }
+};
+
+
+enum RemovableSimulate {
+  REMOVABLE_SIMULATE,
+  FIXED_SIMULATE
 };
 
 
 class HSimulate: public HInstruction {
  public:
-  HSimulate(BailoutId ast_id, int pop_count, Zone* zone)
+  HSimulate(BailoutId ast_id,
+            int pop_count,
+            Zone* zone,
+            RemovableSimulate removable)
       : ast_id_(ast_id),
         pop_count_(pop_count),
         values_(2, zone),
         assigned_indexes_(2, zone),
-        zone_(zone) {}
+        zone_(zone),
+        removable_(removable) {}
   virtual ~HSimulate() {}
 
   virtual void PrintDataTo(StringStream* stream);
@@ -1340,12 +1380,15 @@ class HSimulate: public HInstruction {
     AddValue(kNoIndex, value);
   }
   virtual int OperandCount() { return values_.length(); }
-  virtual HValue* OperandAt(int index) { return values_[index]; }
+  virtual HValue* OperandAt(int index) const { return values_[index]; }
 
   virtual Representation RequiredInputRepresentation(int index) {
     return Representation::None();
   }
 
+  void MergeInto(HSimulate* other);
+  bool is_candidate_for_removal() { return removable_ == REMOVABLE_SIMULATE; }
+
   DECLARE_CONCRETE_INSTRUCTION(Simulate)
 
 #ifdef DEBUG
@@ -1372,6 +1415,7 @@ class HSimulate: public HInstruction {
   ZoneList<HValue*> values_;
   ZoneList<int> assigned_indexes_;
   Zone* zone_;
+  RemovableSimulate removable_;
 };
 
 
@@ -1431,6 +1475,7 @@ class HEnterInlined: public HTemplateInstruction<0> {
                 ZoneList<HValue*>* arguments_values)
       : closure_(closure),
         arguments_count_(arguments_count),
+        arguments_pushed_(false),
         function_(function),
         call_kind_(call_kind),
         inlining_kind_(inlining_kind),
@@ -1442,6 +1487,8 @@ class HEnterInlined: public HTemplateInstruction<0> {
 
   Handle<JSFunction> closure() const { return closure_; }
   int arguments_count() const { return arguments_count_; }
+  bool arguments_pushed() const { return arguments_pushed_; }
+  void set_arguments_pushed() { arguments_pushed_ = true; }
   FunctionLiteral* function() const { return function_; }
   CallKind call_kind() const { return call_kind_; }
   InliningKind inlining_kind() const { return inlining_kind_; }
@@ -1458,6 +1505,7 @@ class HEnterInlined: public HTemplateInstruction<0> {
  private:
   Handle<JSFunction> closure_;
   int arguments_count_;
+  bool arguments_pushed_;
   FunctionLiteral* function_;
   CallKind call_kind_;
   InliningKind inlining_kind_;
@@ -1468,21 +1516,13 @@ class HEnterInlined: public HTemplateInstruction<0> {
 
 class HLeaveInlined: public HTemplateInstruction<0> {
  public:
-  explicit HLeaveInlined(bool arguments_pushed)
-      : arguments_pushed_(arguments_pushed) { }
+  HLeaveInlined() { }
 
   virtual Representation RequiredInputRepresentation(int index) {
     return Representation::None();
   }
 
-  bool arguments_pushed() {
-    return arguments_pushed_;
-  }
-
   DECLARE_CONCRETE_INSTRUCTION(LeaveInlined)
-
- private:
-  bool arguments_pushed_;
 };
 
 
@@ -1517,6 +1557,9 @@ class HThisFunction: public HTemplateInstruction<0> {
 
  protected:
   virtual bool DataEquals(HValue* other) { return true; }
+
+ private:
+  virtual bool IsDeletable() const { return true; }
 };
 
 
@@ -1535,6 +1578,9 @@ class HContext: public HTemplateInstruction<0> {
 
  protected:
   virtual bool DataEquals(HValue* other) { return true; }
+
+ private:
+  virtual bool IsDeletable() const { return true; }
 };
 
 
@@ -1553,6 +1599,9 @@ class HOuterContext: public HUnaryOperation {
 
  protected:
   virtual bool DataEquals(HValue* other) { return true; }
+
+ private:
+  virtual bool IsDeletable() const { return true; }
 };
 
 
@@ -1598,6 +1647,9 @@ class HGlobalObject: public HUnaryOperation {
 
  protected:
   virtual bool DataEquals(HValue* other) { return true; }
+
+ private:
+  virtual bool IsDeletable() const { return true; }
 };
 
 
@@ -1617,6 +1669,9 @@ class HGlobalReceiver: public HUnaryOperation {
 
  protected:
   virtual bool DataEquals(HValue* other) { return true; }
+
+ private:
+  virtual bool IsDeletable() const { return true; }
 };
 
 
@@ -1902,6 +1957,9 @@ class HJSArrayLength: public HTemplateInstruction<2> {
 
  protected:
   virtual bool DataEquals(HValue* other_raw) { return true; }
+
+ private:
+  virtual bool IsDeletable() const { return true; }
 };
 
 
@@ -1922,6 +1980,9 @@ class HFixedArrayBaseLength: public HUnaryOperation {
 
  protected:
   virtual bool DataEquals(HValue* other) { return true; }
+
+ private:
+  virtual bool IsDeletable() const { return true; }
 };
 
 
@@ -1942,6 +2003,9 @@ class HMapEnumLength: public HUnaryOperation {
 
  protected:
   virtual bool DataEquals(HValue* other) { return true; }
+
+ private:
+  virtual bool IsDeletable() const { return true; }
 };
 
 
@@ -1961,6 +2025,9 @@ class HElementsKind: public HUnaryOperation {
 
  protected:
   virtual bool DataEquals(HValue* other) { return true; }
+
+ private:
+  virtual bool IsDeletable() const { return true; }
 };
 
 
@@ -1975,6 +2042,9 @@ class HBitNot: public HUnaryOperation {
   virtual Representation RequiredInputRepresentation(int index) {
     return Representation::Integer32();
   }
+  virtual Representation observed_input_representation(int index) {
+    return Representation::Integer32();
+  }
   virtual HType CalculateInferredType();
 
   virtual HValue* Canonicalize();
@@ -1983,6 +2053,9 @@ class HBitNot: public HUnaryOperation {
 
  protected:
   virtual bool DataEquals(HValue* other) { return true; }
+
+ private:
+  virtual bool IsDeletable() const { return true; }
 };
 
 
@@ -1999,7 +2072,7 @@ class HUnaryMathOperation: public HTemplateInstruction<2> {
         set_representation(Representation::Integer32());
         break;
       case kMathAbs:
-        set_representation(Representation::Tagged());
+        // Not setting representation here: it is None intentionally.
         SetFlag(kFlexibleRepresentation);
         SetGVNFlag(kChangesNewSpacePromotion);
         break;
@@ -2012,6 +2085,9 @@ class HUnaryMathOperation: public HTemplateInstruction<2> {
         set_representation(Representation::Double());
         SetGVNFlag(kChangesNewSpacePromotion);
         break;
+      case kMathExp:
+        set_representation(Representation::Double());
+        break;
       default:
         UNREACHABLE();
     }
@@ -2038,6 +2114,7 @@ class HUnaryMathOperation: public HTemplateInstruction<2> {
         case kMathSqrt:
         case kMathPowHalf:
         case kMathLog:
+        case kMathExp:
         case kMathSin:
         case kMathCos:
         case kMathTan:
@@ -2065,6 +2142,8 @@ class HUnaryMathOperation: public HTemplateInstruction<2> {
   }
 
  private:
+  virtual bool IsDeletable() const { return true; }
+
   BuiltinFunctionId op_;
 };
 
@@ -2080,6 +2159,9 @@ class HLoadElements: public HTemplateInstruction<2> {
   }
 
   HValue* value() { return OperandAt(0); }
+  HValue* typecheck() { return OperandAt(1); }
+
+  virtual void PrintDataTo(StringStream* stream);
 
   virtual Representation RequiredInputRepresentation(int index) {
     return Representation::Tagged();
@@ -2089,6 +2171,9 @@ class HLoadElements: public HTemplateInstruction<2> {
 
  protected:
   virtual bool DataEquals(HValue* other) { return true; }
+
+ private:
+  virtual bool IsDeletable() const { return true; }
 };
 
 
@@ -2112,6 +2197,9 @@ class HLoadExternalArrayPointer: public HUnaryOperation {
 
  protected:
   virtual bool DataEquals(HValue* other) { return true; }
+
+ private:
+  virtual bool IsDeletable() const { return true; }
 };
 
 
@@ -2168,6 +2256,7 @@ class HCheckMaps: public HTemplateInstruction<2> {
   virtual Representation RequiredInputRepresentation(int index) {
     return Representation::Tagged();
   }
+
   virtual void PrintDataTo(StringStream* stream);
   virtual HType CalculateInferredType();
 
@@ -2328,10 +2417,6 @@ class HCheckPrototypeMaps: public HTemplateInstruction<0> {
     SetGVNFlag(kDependsOnMaps);
   }
 
-#ifdef DEBUG
-  virtual void Verify();
-#endif
-
   Handle<JSObject> prototype() const { return prototype_; }
   Handle<JSObject> holder() const { return holder_; }
 
@@ -2399,19 +2484,21 @@ class HPhi: public HValue {
       indirect_uses_[i] = 0;
     }
     ASSERT(merged_index >= 0);
-    set_representation(Representation::Tagged());
     SetFlag(kFlexibleRepresentation);
   }
 
-  virtual Representation InferredRepresentation();
+  virtual Representation RepresentationFromInputs();
 
   virtual Range* InferRange(Zone* zone);
+  virtual void InferRepresentation(HInferRepresentation* h_infer);
+  Representation RepresentationObservedByAllNonPhiUses();
+  Representation RepresentationFromUseRequirements();
   virtual Representation RequiredInputRepresentation(int index) {
     return representation();
   }
   virtual HType CalculateInferredType();
   virtual int OperandCount() { return inputs_.length(); }
-  virtual HValue* OperandAt(int index) { return inputs_[index]; }
+  virtual HValue* OperandAt(int index) const { return inputs_[index]; }
   HValue* GetRedundantReplacement();
   void AddInput(HValue* value);
   bool HasRealUses();
@@ -2469,14 +2556,17 @@ class HPhi: public HValue {
   bool AllOperandsConvertibleToInteger() {
     for (int i = 0; i < OperandCount(); ++i) {
       if (!OperandAt(i)->IsConvertibleToInteger()) {
+        if (FLAG_trace_representation) {
+          HValue* input = OperandAt(i);
+          PrintF("#%d %s: Input #%d %s at %d is NCTI\n",
+                 id(), Mnemonic(), input->id(), input->Mnemonic(), i);
+        }
         return false;
       }
     }
     return true;
   }
 
-  void ResetInteger32Uses();
-
  protected:
   virtual void DeleteFromGraph();
   virtual void InternalSetOperandAt(int index, HValue* value) {
@@ -2507,6 +2597,9 @@ class HArgumentsObject: public HTemplateInstruction<0> {
   }
 
   DECLARE_CONCRETE_INSTRUCTION(ArgumentsObject)
+
+ private:
+  virtual bool IsDeletable() const { return true; }
 };
 
 
@@ -2562,7 +2655,6 @@ class HConstant: public HTemplateInstruction<0> {
   }
 
   virtual bool EmitAtUses() { return !representation().IsDouble(); }
-  virtual HValue* Canonicalize();
   virtual void PrintDataTo(StringStream* stream);
   virtual HType CalculateInferredType();
   bool IsInteger() { return handle()->IsSmi(); }
@@ -2635,6 +2727,8 @@ class HConstant: public HTemplateInstruction<0> {
   }
 
  private:
+  virtual bool IsDeletable() const { return true; }
+
   // If this is a numerical constant, handle_ either points to to the
   // HeapObject the constant originated from or is null.  If the
   // constant is non-numeric, handle_ always points to a valid
@@ -2655,11 +2749,14 @@ class HConstant: public HTemplateInstruction<0> {
 
 class HBinaryOperation: public HTemplateInstruction<3> {
  public:
-  HBinaryOperation(HValue* context, HValue* left, HValue* right) {
+  HBinaryOperation(HValue* context, HValue* left, HValue* right)
+      : observed_output_representation_(Representation::None()) {
     ASSERT(left != NULL && right != NULL);
     SetOperandAt(0, context);
     SetOperandAt(1, left);
     SetOperandAt(2, right);
+    observed_input_representation_[0] = Representation::None();
+    observed_input_representation_[1] = Representation::None();
   }
 
   HValue* context() { return OperandAt(0); }
@@ -2678,9 +2775,34 @@ class HBinaryOperation: public HTemplateInstruction<3> {
     return right();
   }
 
+  void set_observed_input_representation(Representation left,
+                                         Representation right) {
+    observed_input_representation_[0] = left;
+    observed_input_representation_[1] = right;
+  }
+
+  virtual void initialize_output_representation(Representation observed) {
+    observed_output_representation_ = observed;
+  }
+
+  virtual Representation observed_input_representation(int index) {
+    if (index == 0) return Representation::Tagged();
+    return observed_input_representation_[index - 1];
+  }
+
+  virtual void InferRepresentation(HInferRepresentation* h_infer);
+  virtual Representation RepresentationFromInputs();
+  virtual void AssumeRepresentation(Representation r);
+
   virtual bool IsCommutative() const { return false; }
 
   virtual void PrintDataTo(StringStream* stream);
+
+  DECLARE_ABSTRACT_INSTRUCTION(BinaryOperation)
+
+ private:
+  Representation observed_input_representation_[2];
+  Representation observed_output_representation_;
 };
 
 
@@ -2755,6 +2877,9 @@ class HArgumentsElements: public HTemplateInstruction<0> {
  protected:
   virtual bool DataEquals(HValue* other) { return true; }
 
+ private:
+  virtual bool IsDeletable() const { return true; }
+
   bool from_inlined_;
 };
 
@@ -2774,6 +2899,9 @@ class HArgumentsLength: public HUnaryOperation {
 
  protected:
   virtual bool DataEquals(HValue* other) { return true; }
+
+ private:
+  virtual bool IsDeletable() const { return true; }
 };
 
 
@@ -2844,6 +2972,9 @@ class HBoundsCheck: public HTemplateInstruction<2> {
     }
     return Representation::Integer32();
   }
+  virtual Representation observed_input_representation(int index) {
+    return Representation::Integer32();
+  }
 
   virtual void PrintDataTo(StringStream* stream);
 
@@ -2862,12 +2993,9 @@ class HBitwiseBinaryOperation: public HBinaryOperation {
  public:
   HBitwiseBinaryOperation(HValue* context, HValue* left, HValue* right)
       : HBinaryOperation(context, left, right) {
-    set_representation(Representation::Tagged());
     SetFlag(kFlexibleRepresentation);
+    SetFlag(kTruncatingToInt32);
     SetAllSideEffects();
-    observed_input_representation_[0] = Representation::Tagged();
-    observed_input_representation_[1] = Representation::None();
-    observed_input_representation_[2] = Representation::None();
   }
 
   virtual Representation RequiredInputRepresentation(int index) {
@@ -2880,26 +3008,32 @@ class HBitwiseBinaryOperation: public HBinaryOperation {
     if (!to.IsTagged()) {
       ASSERT(to.IsInteger32());
       ClearAllSideEffects();
-      SetFlag(kTruncatingToInt32);
       SetFlag(kUseGVN);
+    } else {
+      SetAllSideEffects();
+      ClearFlag(kUseGVN);
     }
   }
 
-  virtual HType CalculateInferredType();
-
-  virtual Representation ObservedInputRepresentation(int index) {
-    return observed_input_representation_[index];
+  virtual void UpdateRepresentation(Representation new_rep,
+                                    HInferRepresentation* h_infer,
+                                    const char* reason) {
+    // We only generate either int32 or generic tagged bitwise operations.
+    if (new_rep.IsDouble()) new_rep = Representation::Integer32();
+    HValue::UpdateRepresentation(new_rep, h_infer, reason);
   }
 
-  void InitializeObservedInputRepresentation(Representation r) {
-    observed_input_representation_[1] = r;
-    observed_input_representation_[2] = r;
+  virtual void initialize_output_representation(Representation observed) {
+    if (observed.IsDouble()) observed = Representation::Integer32();
+    HBinaryOperation::initialize_output_representation(observed);
   }
 
+  virtual HType CalculateInferredType();
+
   DECLARE_ABSTRACT_INSTRUCTION(BitwiseBinaryOperation)
 
  private:
-  Representation observed_input_representation_[3];
+  virtual bool IsDeletable() const { return true; }
 };
 
 
@@ -2922,6 +3056,9 @@ class HMathFloorOfDiv: public HBinaryOperation {
 
  protected:
   virtual bool DataEquals(HValue* other) { return true; }
+
+ private:
+  virtual bool IsDeletable() const { return true; }
 };
 
 
@@ -2929,13 +3066,15 @@ class HArithmeticBinaryOperation: public HBinaryOperation {
  public:
   HArithmeticBinaryOperation(HValue* context, HValue* left, HValue* right)
       : HBinaryOperation(context, left, right) {
-    set_representation(Representation::Tagged());
-    SetFlag(kFlexibleRepresentation);
     SetAllSideEffects();
+    SetFlag(kFlexibleRepresentation);
   }
 
   virtual void RepresentationChanged(Representation to) {
-    if (!to.IsTagged()) {
+    if (to.IsTagged()) {
+      SetAllSideEffects();
+      ClearFlag(kUseGVN);
+    } else {
       ClearAllSideEffects();
       SetFlag(kUseGVN);
     }
@@ -2948,12 +3087,8 @@ class HArithmeticBinaryOperation: public HBinaryOperation {
         : representation();
   }
 
-  virtual Representation InferredRepresentation() {
-    if (left()->representation().Equals(right()->representation())) {
-      return left()->representation();
-    }
-    return HValue::InferredRepresentation();
-  }
+ private:
+  virtual bool IsDeletable() const { return true; }
 };
 
 
@@ -2970,11 +3105,9 @@ class HCompareGeneric: public HBinaryOperation {
   }
 
   virtual Representation RequiredInputRepresentation(int index) {
-    return Representation::Tagged();
-  }
-
-  Representation GetInputRepresentation() const {
-    return Representation::Tagged();
+    return index == 0
+        ? Representation::Tagged()
+        : representation();
   }
 
   Token::Value token() const { return token_; }
@@ -2993,6 +3126,7 @@ class HCompareIDAndBranch: public HTemplateControlInstruction<2, 2> {
  public:
   HCompareIDAndBranch(HValue* left, HValue* right, Token::Value token)
       : token_(token) {
+    SetFlag(kFlexibleRepresentation);
     ASSERT(Token::IsCompareOp(token));
     SetOperandAt(0, left);
     SetOperandAt(1, right);
@@ -3002,20 +3136,26 @@ class HCompareIDAndBranch: public HTemplateControlInstruction<2, 2> {
   HValue* right() { return OperandAt(1); }
   Token::Value token() const { return token_; }
 
-  void SetInputRepresentation(Representation r);
-  Representation GetInputRepresentation() const {
-    return input_representation_;
+  void set_observed_input_representation(Representation left,
+                                         Representation right) {
+      observed_input_representation_[0] = left;
+      observed_input_representation_[1] = right;
   }
 
+  virtual void InferRepresentation(HInferRepresentation* h_infer);
+
   virtual Representation RequiredInputRepresentation(int index) {
-    return input_representation_;
+    return representation();
+  }
+  virtual Representation observed_input_representation(int index) {
+    return observed_input_representation_[index];
   }
   virtual void PrintDataTo(StringStream* stream);
 
   DECLARE_CONCRETE_INSTRUCTION(CompareIDAndBranch)
 
  private:
-  Representation input_representation_;
+  Representation observed_input_representation_[2];
   Token::Value token_;
 };
 
@@ -3076,6 +3216,9 @@ class HIsNilAndBranch: public HUnaryControlInstruction {
   virtual Representation RequiredInputRepresentation(int index) {
     return Representation::Tagged();
   }
+  virtual Representation observed_input_representation(int index) {
+    return Representation::Tagged();
+  }
 
   DECLARE_CONCRETE_INSTRUCTION(IsNilAndBranch)
 
@@ -3239,6 +3382,9 @@ class HGetCachedArrayIndex: public HUnaryOperation {
 
  protected:
   virtual bool DataEquals(HValue* other) { return true; }
+
+ private:
+  virtual bool IsDeletable() const { return true; }
 };
 
 
@@ -3343,18 +3489,26 @@ class HPower: public HTemplateInstruction<2> {
   }
 
   HValue* left() { return OperandAt(0); }
-  HValue* right() { return OperandAt(1); }
+  HValue* right() const { return OperandAt(1); }
 
   virtual Representation RequiredInputRepresentation(int index) {
     return index == 0
       ? Representation::Double()
       : Representation::None();
   }
+  virtual Representation observed_input_representation(int index) {
+    return RequiredInputRepresentation(index);
+  }
 
   DECLARE_CONCRETE_INSTRUCTION(Power)
 
  protected:
   virtual bool DataEquals(HValue* other) { return true; }
+
+ private:
+  virtual bool IsDeletable() const {
+    return !right()->representation().IsTagged();
+  }
 };
 
 
@@ -3372,6 +3526,9 @@ class HRandom: public HTemplateInstruction<1> {
   }
 
   DECLARE_CONCRETE_INSTRUCTION(Random)
+
+ private:
+  virtual bool IsDeletable() const { return true; }
 };
 
 
@@ -3502,6 +3659,16 @@ class HDiv: public HArithmeticBinaryOperation {
     SetFlag(kCanOverflow);
   }
 
+  bool HasPowerOf2Divisor() {
+    if (right()->IsConstant() &&
+        HConstant::cast(right())->HasInteger32Value()) {
+      int32_t value = HConstant::cast(right())->Integer32Value();
+      return value != 0 && (IsPowerOf2(value) || IsPowerOf2(-value));
+    }
+
+    return false;
+  }
+
   virtual HValue* EnsureAndPropagateNotMinusZero(BitVector* visited);
 
   static HInstruction* NewHDiv(Zone* zone,
@@ -3527,14 +3694,21 @@ class HMathMinMax: public HArithmeticBinaryOperation {
         operation_(op) { }
 
   virtual Representation RequiredInputRepresentation(int index) {
-      return index == 0
-          ? Representation::Tagged()
-          : representation();
-    }
+    return index == 0 ? Representation::Tagged()
+                      : representation();
+  }
+
+  virtual Representation observed_input_representation(int index) {
+    return RequiredInputRepresentation(index);
+  }
 
-  virtual Representation InferredRepresentation() {
-    if (left()->representation().IsInteger32() &&
-        right()->representation().IsInteger32()) {
+  virtual void InferRepresentation(HInferRepresentation* h_infer);
+
+  virtual Representation RepresentationFromInputs() {
+    Representation left_rep = left()->representation();
+    Representation right_rep = right()->representation();
+    if ((left_rep.IsNone() || left_rep.IsInteger32()) &&
+        (right_rep.IsNone() || right_rep.IsInteger32())) {
       return Representation::Integer32();
     }
     return Representation::Double();
@@ -3653,6 +3827,25 @@ class HSar: public HBitwiseBinaryOperation {
 };
 
 
+class HRor: public HBitwiseBinaryOperation {
+ public:
+  HRor(HValue* context, HValue* left, HValue* right)
+      : HBitwiseBinaryOperation(context, left, right) {
+    ChangeRepresentation(Representation::Integer32());
+  }
+
+  static HInstruction* NewHRor(Zone* zone,
+                               HValue* context,
+                               HValue* left,
+                               HValue* right);
+
+  DECLARE_CONCRETE_INSTRUCTION(Ror)
+
+ protected:
+  virtual bool DataEquals(HValue* other) { return true; }
+};
+
+
 class HOsrEntry: public HTemplateInstruction<0> {
  public:
   explicit HOsrEntry(BailoutId ast_id) : ast_id_(ast_id) {
@@ -3762,7 +3955,7 @@ class HLoadGlobalCell: public HTemplateInstruction<0> {
   }
 
   Handle<JSGlobalPropertyCell>  cell() const { return cell_; }
-  bool RequiresHoleCheck();
+  bool RequiresHoleCheck() const;
 
   virtual void PrintDataTo(StringStream* stream);
 
@@ -3784,6 +3977,8 @@ class HLoadGlobalCell: public HTemplateInstruction<0> {
   }
 
  private:
+  virtual bool IsDeletable() const { return !RequiresHoleCheck(); }
+
   Handle<JSGlobalPropertyCell> cell_;
   PropertyDetails details_;
 };
@@ -3831,7 +4026,8 @@ inline bool StoringValueNeedsWriteBarrier(HValue* value) {
 
 inline bool ReceiverObjectNeedsWriteBarrier(HValue* object,
                                             HValue* new_space_dominator) {
-  return !object->IsAllocateObject() || (object != new_space_dominator);
+  return (!object->IsAllocateObject() && !object->IsFastLiteral()) ||
+         (object != new_space_dominator);
 }
 
 
@@ -3944,7 +4140,7 @@ class HLoadContextSlot: public HUnaryOperation {
     return mode_ == kCheckDeoptimize;
   }
 
-  bool RequiresHoleCheck() {
+  bool RequiresHoleCheck() const {
     return mode_ != kNoCheck;
   }
 
@@ -3963,6 +4159,8 @@ class HLoadContextSlot: public HUnaryOperation {
   }
 
  private:
+  virtual bool IsDeletable() const { return !RequiresHoleCheck(); }
+
   int slot_index_;
   Mode mode_;
 };
@@ -4055,6 +4253,8 @@ class HLoadNamedField: public HUnaryOperation {
   }
 
  private:
+  virtual bool IsDeletable() const { return true; }
+
   bool is_in_object_;
   int offset_;
 };
@@ -4153,29 +4353,59 @@ class ArrayInstructionInterface {
   virtual ~ArrayInstructionInterface() { };
 };
 
-class HLoadKeyedFastElement
+
+class HLoadKeyed
     : public HTemplateInstruction<3>, public ArrayInstructionInterface {
  public:
-  HLoadKeyedFastElement(HValue* obj,
-                        HValue* key,
-                        HValue* dependency,
-                        ElementsKind elements_kind = FAST_ELEMENTS)
+  HLoadKeyed(HValue* obj,
+             HValue* key,
+             HValue* dependency,
+             ElementsKind elements_kind)
       : bit_field_(0) {
-    ASSERT(IsFastSmiOrObjectElementsKind(elements_kind));
     bit_field_ = ElementsKindField::encode(elements_kind);
-    if (IsFastSmiElementsKind(elements_kind) &&
-        IsFastPackedElementsKind(elements_kind)) {
-      set_type(HType::Smi());
-    }
+
     SetOperandAt(0, obj);
     SetOperandAt(1, key);
     SetOperandAt(2, dependency);
-    set_representation(Representation::Tagged());
-    SetGVNFlag(kDependsOnArrayElements);
+
+    if (!is_external()) {
+      // I can detect the case between storing double (holey and fast) and
+      // smi/object by looking at elements_kind_.
+      ASSERT(IsFastSmiOrObjectElementsKind(elements_kind) ||
+             IsFastDoubleElementsKind(elements_kind));
+
+      if (IsFastSmiOrObjectElementsKind(elements_kind)) {
+        if (IsFastSmiElementsKind(elements_kind) &&
+            IsFastPackedElementsKind(elements_kind)) {
+          set_type(HType::Smi());
+        }
+
+        set_representation(Representation::Tagged());
+        SetGVNFlag(kDependsOnArrayElements);
+      } else {
+        set_representation(Representation::Double());
+        SetGVNFlag(kDependsOnDoubleArrayElements);
+      }
+    } else {
+      if (elements_kind == EXTERNAL_FLOAT_ELEMENTS ||
+          elements_kind == EXTERNAL_DOUBLE_ELEMENTS) {
+        set_representation(Representation::Double());
+      } else {
+        set_representation(Representation::Integer32());
+      }
+
+      SetGVNFlag(kDependsOnSpecializedArrayElements);
+      // Native code could change the specialized array.
+      SetGVNFlag(kDependsOnCalls);
+    }
+
     SetFlag(kUseGVN);
   }
 
-  HValue* object() { return OperandAt(0); }
+  bool is_external() const {
+    return IsExternalArrayElementsKind(elements_kind());
+  }
+  HValue* elements() { return OperandAt(0); }
   HValue* key() { return OperandAt(1); }
   HValue* dependency() { return OperandAt(2); }
   uint32_t index_offset() { return IndexOffsetField::decode(bit_field_); }
@@ -4193,158 +4423,68 @@ class HLoadKeyedFastElement
   }
 
   virtual Representation RequiredInputRepresentation(int index) {
-    // The key is supposed to be Integer32.
-    if (index == 0) return Representation::Tagged();
+    // kind_fast:       tagged[int32] (none)
+    // kind_double:     tagged[int32] (none)
+    // kind_external: external[int32] (none)
+    if (index == 0) {
+      return is_external() ? Representation::External()
+          : Representation::Tagged();
+    }
     if (index == 1) return Representation::Integer32();
     return Representation::None();
   }
 
+  virtual Representation observed_input_representation(int index) {
+    return RequiredInputRepresentation(index);
+  }
+
   virtual void PrintDataTo(StringStream* stream);
 
-  bool RequiresHoleCheck();
+  bool RequiresHoleCheck() const;
+
+  virtual Range* InferRange(Zone* zone);
 
-  DECLARE_CONCRETE_INSTRUCTION(LoadKeyedFastElement)
+  DECLARE_CONCRETE_INSTRUCTION(LoadKeyed)
 
  protected:
   virtual bool DataEquals(HValue* other) {
-    if (!other->IsLoadKeyedFastElement()) return false;
-    HLoadKeyedFastElement* other_load = HLoadKeyedFastElement::cast(other);
+    if (!other->IsLoadKeyed()) return false;
+    HLoadKeyed* other_load = HLoadKeyed::cast(other);
+
     if (IsDehoisted() && index_offset() != other_load->index_offset())
       return false;
     return elements_kind() == other_load->elements_kind();
   }
 
  private:
-  class ElementsKindField:  public BitField<ElementsKind, 0, 4> {};
-  class IndexOffsetField:   public BitField<uint32_t, 4, 27> {};
-  class IsDehoistedField:   public BitField<bool, 31, 1> {};
-  uint32_t bit_field_;
-};
-
-
-enum HoleCheckMode { PERFORM_HOLE_CHECK, OMIT_HOLE_CHECK };
-
-
-class HLoadKeyedFastDoubleElement
-    : public HTemplateInstruction<3>, public ArrayInstructionInterface {
- public:
-  HLoadKeyedFastDoubleElement(
-    HValue* elements,
-    HValue* key,
-    HValue* dependency,
-    HoleCheckMode hole_check_mode = PERFORM_HOLE_CHECK)
-      : index_offset_(0),
-        is_dehoisted_(false),
-        hole_check_mode_(hole_check_mode) {
-    SetOperandAt(0, elements);
-    SetOperandAt(1, key);
-    SetOperandAt(2, dependency);
-    set_representation(Representation::Double());
-    SetGVNFlag(kDependsOnDoubleArrayElements);
-    SetFlag(kUseGVN);
-  }
-
-  HValue* elements() { return OperandAt(0); }
-  HValue* key() { return OperandAt(1); }
-  HValue* dependency() { return OperandAt(2); }
-  uint32_t index_offset() { return index_offset_; }
-  void SetIndexOffset(uint32_t index_offset) { index_offset_ = index_offset; }
-  HValue* GetKey() { return key(); }
-  void SetKey(HValue* key) { SetOperandAt(1, key); }
-  bool IsDehoisted() { return is_dehoisted_; }
-  void SetDehoisted(bool is_dehoisted) { is_dehoisted_ = is_dehoisted; }
-
-  virtual Representation RequiredInputRepresentation(int index) {
-    // The key is supposed to be Integer32.
-    if (index == 0) return Representation::Tagged();
-    if (index == 1) return Representation::Integer32();
-    return Representation::None();
-  }
-
-  bool RequiresHoleCheck() {
-    return hole_check_mode_ == PERFORM_HOLE_CHECK;
-  }
-
-  virtual void PrintDataTo(StringStream* stream);
-
-  DECLARE_CONCRETE_INSTRUCTION(LoadKeyedFastDoubleElement)
-
- protected:
-  virtual bool DataEquals(HValue* other) {
-    if (!other->IsLoadKeyedFastDoubleElement()) return false;
-    HLoadKeyedFastDoubleElement* other_load =
-        HLoadKeyedFastDoubleElement::cast(other);
-    return hole_check_mode_ == other_load->hole_check_mode_;
-  }
-
- private:
-  uint32_t index_offset_;
-  bool is_dehoisted_;
-  HoleCheckMode hole_check_mode_;
-};
-
-
-class HLoadKeyedSpecializedArrayElement
-    : public HTemplateInstruction<3>, public ArrayInstructionInterface {
- public:
-  HLoadKeyedSpecializedArrayElement(HValue* external_elements,
-                                    HValue* key,
-                                    HValue* dependency,
-                                    ElementsKind elements_kind)
-      :  elements_kind_(elements_kind),
-         index_offset_(0),
-         is_dehoisted_(false) {
-    SetOperandAt(0, external_elements);
-    SetOperandAt(1, key);
-    SetOperandAt(2, dependency);
-    if (elements_kind == EXTERNAL_FLOAT_ELEMENTS ||
-        elements_kind == EXTERNAL_DOUBLE_ELEMENTS) {
-      set_representation(Representation::Double());
-    } else {
-      set_representation(Representation::Integer32());
-    }
-    SetGVNFlag(kDependsOnSpecializedArrayElements);
-    // Native code could change the specialized array.
-    SetGVNFlag(kDependsOnCalls);
-    SetFlag(kUseGVN);
+  virtual bool IsDeletable() const {
+    return !RequiresHoleCheck();
   }
 
-  virtual void PrintDataTo(StringStream* stream);
-
-  virtual Representation RequiredInputRepresentation(int index) {
-    // The key is supposed to be Integer32.
-    if (index == 0) return Representation::External();
-    if (index == 1) return Representation::Integer32();
-    return Representation::None();
-  }
+  // Establish some checks around our packed fields
+  enum LoadKeyedBits {
+    kBitsForElementsKind = 5,
+    kBitsForIndexOffset = 26,
+    kBitsForIsDehoisted = 1,
 
-  HValue* external_pointer() { return OperandAt(0); }
-  HValue* key() { return OperandAt(1); }
-  HValue* dependency() { return OperandAt(2); }
-  ElementsKind elements_kind() const { return elements_kind_; }
-  uint32_t index_offset() { return index_offset_; }
-  void SetIndexOffset(uint32_t index_offset) { index_offset_ = index_offset; }
-  HValue* GetKey() { return key(); }
-  void SetKey(HValue* key) { SetOperandAt(1, key); }
-  bool IsDehoisted() { return is_dehoisted_; }
-  void SetDehoisted(bool is_dehoisted) { is_dehoisted_ = is_dehoisted; }
-
-  virtual Range* InferRange(Zone* zone);
-
-  DECLARE_CONCRETE_INSTRUCTION(LoadKeyedSpecializedArrayElement)
-
- protected:
-  virtual bool DataEquals(HValue* other) {
-    if (!other->IsLoadKeyedSpecializedArrayElement()) return false;
-    HLoadKeyedSpecializedArrayElement* cast_other =
-        HLoadKeyedSpecializedArrayElement::cast(other);
-    return elements_kind_ == cast_other->elements_kind();
-  }
+    kStartElementsKind = 0,
+    kStartIndexOffset = kStartElementsKind + kBitsForElementsKind,
+    kStartIsDehoisted = kStartIndexOffset + kBitsForIndexOffset
+  };
 
- private:
-  ElementsKind elements_kind_;
-  uint32_t index_offset_;
-  bool is_dehoisted_;
+  STATIC_ASSERT((kBitsForElementsKind + kBitsForIndexOffset +
+                 kBitsForIsDehoisted) <= sizeof(uint32_t)*8);
+  STATIC_ASSERT(kElementsKindCount <= (1 << kBitsForElementsKind));
+  class ElementsKindField:
+    public BitField<ElementsKind, kStartElementsKind, kBitsForElementsKind>
+    {};  // NOLINT
+  class IndexOffsetField:
+    public BitField<uint32_t, kStartIndexOffset, kBitsForIndexOffset>
+    {};  // NOLINT
+  class IsDehoistedField:
+    public BitField<bool, kStartIsDehoisted, kBitsForIsDehoisted>
+    {};  // NOLINT
+  uint32_t bit_field_;
 };
 
 
@@ -4365,6 +4505,7 @@ class HLoadKeyedGeneric: public HTemplateInstruction<3> {
   virtual void PrintDataTo(StringStream* stream);
 
   virtual Representation RequiredInputRepresentation(int index) {
+    // tagged[tagged]
     return Representation::Tagged();
   }
 
@@ -4470,83 +4611,75 @@ class HStoreNamedGeneric: public HTemplateInstruction<3> {
 };
 
 
-class HStoreKeyedFastElement
+class HStoreKeyed
     : public HTemplateInstruction<3>, public ArrayInstructionInterface {
  public:
-  HStoreKeyedFastElement(HValue* obj, HValue* key, HValue* val,
-                         ElementsKind elements_kind = FAST_ELEMENTS)
+  HStoreKeyed(HValue* obj, HValue* key, HValue* val,
+              ElementsKind elements_kind)
       : elements_kind_(elements_kind), index_offset_(0), is_dehoisted_(false) {
     SetOperandAt(0, obj);
     SetOperandAt(1, key);
     SetOperandAt(2, val);
-    SetGVNFlag(kChangesArrayElements);
-  }
-
-  virtual Representation RequiredInputRepresentation(int index) {
-    // The key is supposed to be Integer32.
-    return index == 1
-        ? Representation::Integer32()
-        : Representation::Tagged();
-  }
-
-  HValue* object() { return OperandAt(0); }
-  HValue* key() { return OperandAt(1); }
-  HValue* value() { return OperandAt(2); }
-  bool value_is_smi() {
-    return IsFastSmiElementsKind(elements_kind_);
-  }
-  uint32_t index_offset() { return index_offset_; }
-  void SetIndexOffset(uint32_t index_offset) { index_offset_ = index_offset; }
-  HValue* GetKey() { return key(); }
-  void SetKey(HValue* key) { SetOperandAt(1, key); }
-  bool IsDehoisted() { return is_dehoisted_; }
-  void SetDehoisted(bool is_dehoisted) { is_dehoisted_ = is_dehoisted; }
 
-  bool NeedsWriteBarrier() {
-    if (value_is_smi()) {
-      return false;
+    if (is_external()) {
+      SetGVNFlag(kChangesSpecializedArrayElements);
+    } else if (IsFastDoubleElementsKind(elements_kind)) {
+      SetGVNFlag(kChangesDoubleArrayElements);
+      SetFlag(kDeoptimizeOnUndefined);
     } else {
-      return StoringValueNeedsWriteBarrier(value());
+      SetGVNFlag(kChangesArrayElements);
     }
-  }
 
-  virtual void PrintDataTo(StringStream* stream);
+    // EXTERNAL_{UNSIGNED_,}{BYTE,SHORT,INT}_ELEMENTS are truncating.
+    if (elements_kind >= EXTERNAL_BYTE_ELEMENTS &&
+        elements_kind <= EXTERNAL_UNSIGNED_INT_ELEMENTS) {
+      SetFlag(kTruncatingToInt32);
+    }
+  }
 
-  DECLARE_CONCRETE_INSTRUCTION(StoreKeyedFastElement)
+  virtual Representation RequiredInputRepresentation(int index) {
+    // kind_fast:       tagged[int32] = tagged
+    // kind_double:     tagged[int32] = double
+    // kind_external: external[int32] = (double | int32)
+    if (index == 0) {
+      return is_external() ? Representation::External()
+                           : Representation::Tagged();
+    } else if (index == 1) {
+      return Representation::Integer32();
+    }
 
- private:
-  ElementsKind elements_kind_;
-  uint32_t index_offset_;
-  bool is_dehoisted_;
-};
+    ASSERT_EQ(index, 2);
+    if (IsDoubleOrFloatElementsKind(elements_kind())) {
+      return Representation::Double();
+    }
 
+    return is_external() ? Representation::Integer32()
+                         : Representation::Tagged();
+  }
 
-class HStoreKeyedFastDoubleElement
-    : public HTemplateInstruction<3>, public ArrayInstructionInterface {
- public:
-  HStoreKeyedFastDoubleElement(HValue* elements,
-                               HValue* key,
-                               HValue* val)
-      : index_offset_(0), is_dehoisted_(false) {
-    SetOperandAt(0, elements);
-    SetOperandAt(1, key);
-    SetOperandAt(2, val);
-    SetGVNFlag(kChangesDoubleArrayElements);
+  bool is_external() const {
+    return IsExternalArrayElementsKind(elements_kind());
   }
 
-  virtual Representation RequiredInputRepresentation(int index) {
-    if (index == 1) {
-      return Representation::Integer32();
-    } else if (index == 2) {
+  virtual Representation observed_input_representation(int index) {
+    if (index < 2) return RequiredInputRepresentation(index);
+    if (IsDoubleOrFloatElementsKind(elements_kind())) {
       return Representation::Double();
-    } else {
-      return Representation::Tagged();
     }
+    if (is_external()) {
+      return Representation::Integer32();
+    }
+    // For fast object elements kinds, don't assume anything.
+    return Representation::None();
   }
 
   HValue* elements() { return OperandAt(0); }
   HValue* key() { return OperandAt(1); }
   HValue* value() { return OperandAt(2); }
+  bool value_is_smi() const {
+    return IsFastSmiElementsKind(elements_kind_);
+  }
+  ElementsKind elements_kind() const { return elements_kind_; }
   uint32_t index_offset() { return index_offset_; }
   void SetIndexOffset(uint32_t index_offset) { index_offset_ = index_offset; }
   HValue* GetKey() { return key(); }
@@ -4555,64 +4688,18 @@ class HStoreKeyedFastDoubleElement
   void SetDehoisted(bool is_dehoisted) { is_dehoisted_ = is_dehoisted; }
 
   bool NeedsWriteBarrier() {
-    return StoringValueNeedsWriteBarrier(value());
+    if (value_is_smi()) {
+      return false;
+    } else {
+      return StoringValueNeedsWriteBarrier(value());
+    }
   }
 
   bool NeedsCanonicalization();
 
   virtual void PrintDataTo(StringStream* stream);
 
-  DECLARE_CONCRETE_INSTRUCTION(StoreKeyedFastDoubleElement)
-
- private:
-  uint32_t index_offset_;
-  bool is_dehoisted_;
-};
-
-
-class HStoreKeyedSpecializedArrayElement
-    : public HTemplateInstruction<3>, public ArrayInstructionInterface {
- public:
-  HStoreKeyedSpecializedArrayElement(HValue* external_elements,
-                                     HValue* key,
-                                     HValue* val,
-                                     ElementsKind elements_kind)
-      : elements_kind_(elements_kind), index_offset_(0), is_dehoisted_(false) {
-    SetGVNFlag(kChangesSpecializedArrayElements);
-    SetOperandAt(0, external_elements);
-    SetOperandAt(1, key);
-    SetOperandAt(2, val);
-  }
-
-  virtual void PrintDataTo(StringStream* stream);
-
-  virtual Representation RequiredInputRepresentation(int index) {
-    if (index == 0) {
-      return Representation::External();
-    } else {
-      bool float_or_double_elements =
-          elements_kind() == EXTERNAL_FLOAT_ELEMENTS ||
-          elements_kind() == EXTERNAL_DOUBLE_ELEMENTS;
-      if (index == 2 && float_or_double_elements) {
-        return Representation::Double();
-      } else {
-        return Representation::Integer32();
-      }
-    }
-  }
-
-  HValue* external_pointer() { return OperandAt(0); }
-  HValue* key() { return OperandAt(1); }
-  HValue* value() { return OperandAt(2); }
-  ElementsKind elements_kind() const { return elements_kind_; }
-  uint32_t index_offset() { return index_offset_; }
-  void SetIndexOffset(uint32_t index_offset) { index_offset_ = index_offset; }
-  HValue* GetKey() { return key(); }
-  void SetKey(HValue* key) { SetOperandAt(1, key); }
-  bool IsDehoisted() { return is_dehoisted_; }
-  void SetDehoisted(bool is_dehoisted) { is_dehoisted_ = is_dehoisted; }
-
-  DECLARE_CONCRETE_INSTRUCTION(StoreKeyedSpecializedArrayElement)
+  DECLARE_CONCRETE_INSTRUCTION(StoreKeyed)
 
  private:
   ElementsKind elements_kind_;
@@ -4643,6 +4730,7 @@ class HStoreKeyedGeneric: public HTemplateInstruction<4> {
   StrictModeFlag strict_mode_flag() { return strict_mode_flag_; }
 
   virtual Representation RequiredInputRepresentation(int index) {
+    // tagged[tagged] = tagged
     return Representation::Tagged();
   }
 
@@ -4664,10 +4752,6 @@ class HTransitionElementsKind: public HTemplateInstruction<1> {
         transitioned_map_(transitioned_map) {
     SetOperandAt(0, object);
     SetFlag(kUseGVN);
-    // Don't set GVN DependOn flags here. That would defeat GVN's detection of
-    // congruent HTransitionElementsKind instructions. Instruction hoisting
-    // handles HTransitionElementsKind instruction specially, explicitly adding
-    // DependsOn flags during its dependency calculations.
     SetGVNFlag(kChangesElementsKind);
     if (original_map->has_fast_double_elements()) {
       SetGVNFlag(kChangesElementsPointer);
@@ -4712,6 +4796,7 @@ class HStringAdd: public HBinaryOperation {
     set_representation(Representation::Tagged());
     SetFlag(kUseGVN);
     SetGVNFlag(kDependsOnMaps);
+    SetGVNFlag(kChangesNewSpacePromotion);
   }
 
   virtual Representation RequiredInputRepresentation(int index) {
@@ -4726,6 +4811,10 @@ class HStringAdd: public HBinaryOperation {
 
  protected:
   virtual bool DataEquals(HValue* other) { return true; }
+
+  // TODO(svenpanne) Might be safe, but leave it out until we know for sure.
+  // private:
+  //  virtual bool IsDeletable() const { return true; }
 };
 
 
@@ -4760,6 +4849,10 @@ class HStringCharCodeAt: public HTemplateInstruction<3> {
   virtual Range* InferRange(Zone* zone) {
     return new(zone) Range(0, String::kMaxUtf16CodeUnit);
   }
+
+  // TODO(svenpanne) Might be safe, but leave it out until we know for sure.
+  // private:
+  //  virtual bool IsDeletable() const { return true; }
 };
 
 
@@ -4786,6 +4879,10 @@ class HStringCharFromCode: public HTemplateInstruction<2> {
   virtual bool DataEquals(HValue* other) { return true; }
 
   DECLARE_CONCRETE_INSTRUCTION(StringCharFromCode)
+
+  // TODO(svenpanne) Might be safe, but leave it out until we know for sure.
+  // private:
+  //  virtual bool IsDeletable() const { return true; }
 };
 
 
@@ -4814,6 +4911,9 @@ class HStringLength: public HUnaryOperation {
   virtual Range* InferRange(Zone* zone) {
     return new(zone) Range(0, String::kMaxLength);
   }
+
+ private:
+  virtual bool IsDeletable() const { return true; }
 };
 
 
@@ -4840,6 +4940,9 @@ class HAllocateObject: public HTemplateInstruction<1> {
   DECLARE_CONCRETE_INSTRUCTION(AllocateObject)
 
  private:
+  // TODO(svenpanne) Might be safe, but leave it out until we know for sure.
+  //  virtual bool IsDeletable() const { return true; }
+
   Handle<JSFunction> constructor_;
 };
 
@@ -4856,6 +4959,8 @@ class HMaterializedLiteral: public HTemplateInstruction<V> {
   int depth() const { return depth_; }
 
  private:
+  virtual bool IsDeletable() const { return true; }
+
   int literal_index_;
   int depth_;
 };
@@ -5031,6 +5136,8 @@ class HFunctionLiteral: public HTemplateInstruction<1> {
   bool pretenure() const { return pretenure_; }
 
  private:
+  virtual bool IsDeletable() const { return true; }
+
   Handle<SharedFunctionInfo> shared_info_;
   bool pretenure_;
 };
@@ -5047,7 +5154,6 @@ class HTypeof: public HTemplateInstruction<2> {
   HValue* context() { return OperandAt(0); }
   HValue* value() { return OperandAt(1); }
 
-  virtual HValue* Canonicalize();
   virtual void PrintDataTo(StringStream* stream);
 
   virtual Representation RequiredInputRepresentation(int index) {
@@ -5055,6 +5161,9 @@ class HTypeof: public HTemplateInstruction<2> {
   }
 
   DECLARE_CONCRETE_INSTRUCTION(Typeof)
+
+ private:
+  virtual bool IsDeletable() const { return true; }
 };
 
 
@@ -5073,6 +5182,9 @@ class HToFastProperties: public HUnaryOperation {
   }
 
   DECLARE_CONCRETE_INSTRUCTION(ToFastProperties)
+
+ private:
+  virtual bool IsDeletable() const { return true; }
 };
 
 
@@ -5087,6 +5199,9 @@ class HValueOf: public HUnaryOperation {
   }
 
   DECLARE_CONCRETE_INSTRUCTION(ValueOf)
+
+ private:
+  virtual bool IsDeletable() const { return true; }
 };
 
 
@@ -5110,6 +5225,33 @@ class HDateField: public HUnaryOperation {
 };
 
 
+class HSeqStringSetChar: public HTemplateInstruction<3> {
+ public:
+  HSeqStringSetChar(String::Encoding encoding,
+                    HValue* string,
+                    HValue* index,
+                    HValue* value) : encoding_(encoding) {
+    SetOperandAt(0, string);
+    SetOperandAt(1, index);
+    SetOperandAt(2, value);
+  }
+
+  String::Encoding encoding() { return encoding_; }
+  HValue* string() { return OperandAt(0); }
+  HValue* index() { return OperandAt(1); }
+  HValue* value() { return OperandAt(2); }
+
+  virtual Representation RequiredInputRepresentation(int index) {
+    return Representation::Tagged();
+  }
+
+  DECLARE_CONCRETE_INSTRUCTION(SeqStringSetChar)
+
+ private:
+  String::Encoding encoding_;
+};
+
+
 class HDeleteProperty: public HBinaryOperation {
  public:
   HDeleteProperty(HValue* context, HValue* obj, HValue* key)
@@ -5283,6 +5425,9 @@ class HLoadFieldByIndex : public HTemplateInstruction<2> {
   }
 
   DECLARE_CONCRETE_INSTRUCTION(LoadFieldByIndex);
+
+ private:
+  virtual bool IsDeletable() const { return true; }
 };
 
 
diff --git a/deps/v8/src/hydrogen.cc b/deps/v8/src/hydrogen.cc
index 75344bb513..d1e5b51a5e 100644
--- a/deps/v8/src/hydrogen.cc
+++ b/deps/v8/src/hydrogen.cc
@@ -133,7 +133,8 @@ HDeoptimize* HBasicBlock::CreateDeoptimize(
 }
 
 
-HSimulate* HBasicBlock::CreateSimulate(BailoutId ast_id) {
+HSimulate* HBasicBlock::CreateSimulate(BailoutId ast_id,
+                                       RemovableSimulate removable) {
   ASSERT(HasEnvironment());
   HEnvironment* environment = last_environment();
   ASSERT(ast_id.IsNone() ||
@@ -142,8 +143,12 @@ HSimulate* HBasicBlock::CreateSimulate(BailoutId ast_id) {
   int push_count = environment->push_count();
   int pop_count = environment->pop_count();
 
-  HSimulate* instr = new(zone()) HSimulate(ast_id, pop_count, zone());
-  for (int i = push_count - 1; i >= 0; --i) {
+  HSimulate* instr =
+      new(zone()) HSimulate(ast_id, pop_count, zone(), removable);
+  // Order of pushed values: newest (top of stack) first. This allows
+  // HSimulate::MergeInto() to easily append additional pushed values
+  // that are older (from further down the stack).
+  for (int i = 0; i < push_count; ++i) {
     instr->AddPushedValue(environment->ExpressionStackAt(i));
   }
   for (int i = 0; i < environment->assigned_variables()->length(); ++i) {
@@ -168,10 +173,9 @@ void HBasicBlock::Finish(HControlInstruction* end) {
 void HBasicBlock::Goto(HBasicBlock* block, FunctionState* state) {
   bool drop_extra = state != NULL &&
       state->inlining_kind() == DROP_EXTRA_ON_RETURN;
-  bool arguments_pushed = state != NULL && state->arguments_pushed();
 
   if (block->IsInlineReturnTarget()) {
-    AddInstruction(new(zone()) HLeaveInlined(arguments_pushed));
+    AddInstruction(new(zone()) HLeaveInlined());
     last_environment_ = last_environment()->DiscardInlined(drop_extra);
   }
 
@@ -185,11 +189,10 @@ void HBasicBlock::AddLeaveInlined(HValue* return_value,
                                   FunctionState* state) {
   HBasicBlock* target = state->function_return();
   bool drop_extra = state->inlining_kind() == DROP_EXTRA_ON_RETURN;
-  bool arguments_pushed = state->arguments_pushed();
 
   ASSERT(target->IsInlineReturnTarget());
   ASSERT(return_value != NULL);
-  AddInstruction(new(zone()) HLeaveInlined(arguments_pushed));
+  AddInstruction(new(zone()) HLeaveInlined());
   last_environment_ = last_environment()->DiscardInlined(drop_extra);
   last_environment()->Push(return_value);
   AddSimulate(BailoutId::None());
@@ -1293,7 +1296,7 @@ void HRangeAnalysis::Analyze(HBasicBlock* block) {
 void HRangeAnalysis::InferControlFlowRange(HCompareIDAndBranch* test,
                                            HBasicBlock* dest) {
   ASSERT((test->FirstSuccessor() == dest) == (test->SecondSuccessor() != dest));
-  if (test->GetInputRepresentation().IsInteger32()) {
+  if (test->representation().IsInteger32()) {
     Token::Value op = test->token();
     if (test->SecondSuccessor() == dest) {
       op = Token::NegateCompareOp(op);
@@ -1950,52 +1953,6 @@ void HGlobalValueNumberer::ProcessLoopBlock(
       if (can_hoist && !graph()->use_optimistic_licm()) {
         can_hoist = block->IsLoopSuccessorDominator();
       }
-      if (instr->IsTransitionElementsKind()) {
-        // It's possible to hoist transitions out of a loop as long as the
-        // hoisting wouldn't move the transition past an instruction that has a
-        // DependsOn flag for anything it changes.
-        GVNFlagSet hoist_depends_blockers =
-            HValue::ConvertChangesToDependsFlags(instr->ChangesFlags());
-
-        // In addition, the transition must not be hoisted above elements kind
-        // changes, or if the transition is destructive to the elements buffer,
-        // changes to array pointer or array contents.
-        GVNFlagSet hoist_change_blockers;
-        hoist_change_blockers.Add(kChangesElementsKind);
-        HTransitionElementsKind* trans = HTransitionElementsKind::cast(instr);
-        if (trans->original_map()->has_fast_double_elements()) {
-          hoist_change_blockers.Add(kChangesElementsPointer);
-          hoist_change_blockers.Add(kChangesDoubleArrayElements);
-        }
-        if (trans->transitioned_map()->has_fast_double_elements()) {
-          hoist_change_blockers.Add(kChangesElementsPointer);
-          hoist_change_blockers.Add(kChangesArrayElements);
-        }
-        if (FLAG_trace_gvn) {
-          GVNFlagSet hoist_blockers = hoist_depends_blockers;
-          hoist_blockers.Add(hoist_change_blockers);
-          GVNFlagSet first_time = *first_time_changes;
-          first_time.Add(*first_time_depends);
-          TRACE_GVN_4("Checking dependencies on HTransitionElementsKind "
-                      "%d (%s) hoist blockers: %s; "
-                      "first-time accumulated: %s\n",
-                      instr->id(),
-                      instr->Mnemonic(),
-                      *GetGVNFlagsString(hoist_blockers),
-                      *GetGVNFlagsString(first_time));
-        }
-        // It's possible to hoist transition from the current loop loop only if
-        // they dominate all of the successor blocks in the same loop and there
-        // are not any instructions that have Changes/DependsOn that intervene
-        // between it and the beginning of the loop header.
-        bool in_nested_loop = block != loop_header &&
-            ((block->parent_loop_header() != loop_header) ||
-             block->IsLoopHeader());
-        can_hoist = !in_nested_loop &&
-            block->IsLoopSuccessorDominator() &&
-            !first_time_depends->ContainsAnyOf(hoist_depends_blockers) &&
-            !first_time_changes->ContainsAnyOf(hoist_change_blockers);
-      }
 
       if (can_hoist) {
         bool inputs_loop_invariant = true;
@@ -2287,32 +2244,8 @@ void HGlobalValueNumberer::AnalyzeGraph() {
 }
 
 
-class HInferRepresentation BASE_EMBEDDED {
- public:
-  explicit HInferRepresentation(HGraph* graph)
-      : graph_(graph),
-        worklist_(8, graph->zone()),
-        in_worklist_(graph->GetMaximumValueID(), graph->zone()) { }
-
-  void Analyze();
-
- private:
-  Representation TryChange(HValue* current);
-  void AddToWorklist(HValue* current);
-  void InferBasedOnInputs(HValue* current);
-  void AddDependantsToWorklist(HValue* current);
-  void InferBasedOnUses(HValue* current);
-
-  Zone* zone() const { return graph_->zone(); }
-
-  HGraph* graph_;
-  ZoneList<HValue*> worklist_;
-  BitVector in_worklist_;
-};
-
-
 void HInferRepresentation::AddToWorklist(HValue* current) {
-  if (current->representation().IsSpecialization()) return;
+  if (current->representation().IsTagged()) return;
   if (!current->CheckFlag(HValue::kFlexibleRepresentation)) return;
   if (in_worklist_.Contains(current->id())) return;
   worklist_.Add(current, zone());
@@ -2320,105 +2253,6 @@ void HInferRepresentation::AddToWorklist(HValue* current) {
 }
 
 
-// This method tries to specialize the representation type of the value
-// given as a parameter. The value is asked to infer its representation type
-// based on its inputs. If the inferred type is more specialized, then this
-// becomes the new representation type of the node.
-void HInferRepresentation::InferBasedOnInputs(HValue* current) {
-  Representation r = current->representation();
-  if (r.IsSpecialization()) return;
-  ASSERT(current->CheckFlag(HValue::kFlexibleRepresentation));
-  Representation inferred = current->InferredRepresentation();
-  if (inferred.IsSpecialization()) {
-    if (FLAG_trace_representation) {
-      PrintF("Changing #%d representation %s -> %s based on inputs\n",
-             current->id(),
-             r.Mnemonic(),
-             inferred.Mnemonic());
-    }
-    current->ChangeRepresentation(inferred);
-    AddDependantsToWorklist(current);
-  }
-}
-
-
-void HInferRepresentation::AddDependantsToWorklist(HValue* value) {
-  for (HUseIterator it(value->uses()); !it.Done(); it.Advance()) {
-    AddToWorklist(it.value());
-  }
-  for (int i = 0; i < value->OperandCount(); ++i) {
-    AddToWorklist(value->OperandAt(i));
-  }
-}
-
-
-// This method calculates whether specializing the representation of the value
-// given as the parameter has a benefit in terms of less necessary type
-// conversions. If there is a benefit, then the representation of the value is
-// specialized.
-void HInferRepresentation::InferBasedOnUses(HValue* value) {
-  Representation r = value->representation();
-  if (r.IsSpecialization() || value->HasNoUses()) return;
-  ASSERT(value->CheckFlag(HValue::kFlexibleRepresentation));
-  Representation new_rep = TryChange(value);
-  if (!new_rep.IsNone()) {
-    if (!value->representation().Equals(new_rep)) {
-      if (FLAG_trace_representation) {
-        PrintF("Changing #%d representation %s -> %s based on uses\n",
-               value->id(),
-               r.Mnemonic(),
-               new_rep.Mnemonic());
-      }
-      value->ChangeRepresentation(new_rep);
-      AddDependantsToWorklist(value);
-    }
-  }
-}
-
-
-Representation HInferRepresentation::TryChange(HValue* value) {
-  // Array of use counts for each representation.
-  int use_count[Representation::kNumRepresentations] = { 0 };
-
-  for (HUseIterator it(value->uses()); !it.Done(); it.Advance()) {
-    HValue* use = it.value();
-    Representation rep = use->ObservedInputRepresentation(it.index());
-    if (rep.IsNone()) continue;
-    if (FLAG_trace_representation) {
-      PrintF("%d %s is used by %d %s as %s\n",
-             value->id(),
-             value->Mnemonic(),
-             use->id(),
-             use->Mnemonic(),
-             rep.Mnemonic());
-    }
-    if (use->IsPhi()) HPhi::cast(use)->AddIndirectUsesTo(&use_count[0]);
-    use_count[rep.kind()] += use->LoopWeight();
-  }
-  int tagged_count = use_count[Representation::kTagged];
-  int double_count = use_count[Representation::kDouble];
-  int int32_count = use_count[Representation::kInteger32];
-  int non_tagged_count = double_count + int32_count;
-
-  // If a non-loop phi has tagged uses, don't convert it to untagged.
-  if (value->IsPhi() && !value->block()->IsLoopHeader() && tagged_count > 0) {
-    return Representation::None();
-  }
-
-  // Prefer unboxing over boxing, the latter is more expensive.
-  if (tagged_count > non_tagged_count) return Representation::None();
-
-  // Prefer Integer32 over Double, if possible.
-  if (int32_count > 0 && value->IsConvertibleToInteger()) {
-    return Representation::Integer32();
-  }
-
-  if (double_count > 0) return Representation::Double();
-
-  return Representation::None();
-}
-
-
 void HInferRepresentation::Analyze() {
   HPhase phase("H_Infer representations", graph_);
 
@@ -2469,7 +2303,6 @@ void HInferRepresentation::Analyze() {
          it.Advance()) {
       HPhi* phi = phi_list->at(it.Current());
       phi->set_is_convertible_to_integer(false);
-      phi->ResetInteger32Uses();
     }
   }
 
@@ -2505,8 +2338,74 @@ void HInferRepresentation::Analyze() {
   while (!worklist_.is_empty()) {
     HValue* current = worklist_.RemoveLast();
     in_worklist_.Remove(current->id());
-    InferBasedOnInputs(current);
-    InferBasedOnUses(current);
+    current->InferRepresentation(this);
+  }
+
+  // Lastly: any instruction that we don't have representation information
+  // for defaults to Tagged.
+  for (int i = 0; i < graph_->blocks()->length(); ++i) {
+    HBasicBlock* block = graph_->blocks()->at(i);
+    const ZoneList<HPhi*>* phis = block->phis();
+    for (int j = 0; j < phis->length(); ++j) {
+      HPhi* phi = phis->at(j);
+      if (phi->representation().IsNone()) {
+        phi->ChangeRepresentation(Representation::Tagged());
+      }
+    }
+    for (HInstruction* current = block->first();
+         current != NULL; current = current->next()) {
+      if (current->representation().IsNone() &&
+          current->CheckFlag(HInstruction::kFlexibleRepresentation)) {
+        current->ChangeRepresentation(Representation::Tagged());
+      }
+    }
+  }
+}
+
+
+void HGraph::MergeRemovableSimulates() {
+  for (int i = 0; i < blocks()->length(); ++i) {
+    HBasicBlock* block = blocks()->at(i);
+    // Always reset the folding candidate at the start of a block.
+    HSimulate* folding_candidate = NULL;
+    // Nasty heuristic: Never remove the first simulate in a block. This
+    // just so happens to have a beneficial effect on register allocation.
+    bool first = true;
+    for (HInstruction* current = block->first();
+         current != NULL; current = current->next()) {
+      if (current->IsLeaveInlined()) {
+        // Never fold simulates from inlined environments into simulates
+        // in the outer environment.
+        // (Before each HEnterInlined, there is a non-foldable HSimulate
+        // anyway, so we get the barrier in the other direction for free.)
+        if (folding_candidate != NULL) {
+          folding_candidate->DeleteAndReplaceWith(NULL);
+        }
+        folding_candidate = NULL;
+        continue;
+      }
+      // If we have an HSimulate and a candidate, perform the folding.
+      if (!current->IsSimulate()) continue;
+      if (first) {
+        first = false;
+        continue;
+      }
+      HSimulate* current_simulate = HSimulate::cast(current);
+      if (folding_candidate != NULL) {
+        folding_candidate->MergeInto(current_simulate);
+        folding_candidate->DeleteAndReplaceWith(NULL);
+        folding_candidate = NULL;
+      }
+      // Check if the current simulate is a candidate for folding.
+      if (current_simulate->previous()->HasObservableSideEffects() &&
+          !current_simulate->next()->IsSimulate()) {
+        continue;
+      }
+      if (!current_simulate->is_candidate_for_removal()) {
+        continue;
+      }
+      folding_candidate = current_simulate;
+    }
   }
 }
 
@@ -2601,7 +2500,6 @@ void HGraph::InsertRepresentationChangeForUse(HValue* value,
   } else {
     next = HInstruction::cast(use_value);
   }
-
   // For constants we try to make the representation change at compile
   // time. When a representation change is not possible without loss of
   // information we treat constants like normal instructions and insert the
@@ -2613,7 +2511,7 @@ void HGraph::InsertRepresentationChangeForUse(HValue* value,
   if (value->IsConstant()) {
     HConstant* constant = HConstant::cast(value);
     // Try to create a new copy of the constant with the new representation.
-    new_value = is_truncating
+    new_value = (is_truncating && to.IsInteger32())
         ? constant->CopyToTruncatedInt32(zone())
         : constant->CopyToRepresentation(to, zone());
   }
@@ -2673,9 +2571,23 @@ void HGraph::InsertRepresentationChanges() {
     for (int i = 0; i < phi_list()->length(); i++) {
       HPhi* phi = phi_list()->at(i);
       if (!phi->CheckFlag(HValue::kTruncatingToInt32)) continue;
-      if (!phi->CheckUsesForFlag(HValue::kTruncatingToInt32)) {
-        phi->ClearFlag(HValue::kTruncatingToInt32);
-        change = true;
+      for (HUseIterator it(phi->uses()); !it.Done(); it.Advance()) {
+        // If a Phi is used as a non-truncating int32 or as a double,
+        // clear its "truncating" flag.
+        HValue* use = it.value();
+        Representation input_representation =
+            use->RequiredInputRepresentation(it.index());
+        if ((input_representation.IsInteger32() &&
+             !use->CheckFlag(HValue::kTruncatingToInt32)) ||
+            input_representation.IsDouble()) {
+          if (FLAG_trace_representation) {
+            PrintF("#%d Phi is not truncating because of #%d %s\n",
+                   phi->id(), it.value()->id(), it.value()->Mnemonic());
+          }
+          phi->ClearFlag(HValue::kTruncatingToInt32);
+          change = true;
+          break;
+        }
       }
     }
   }
@@ -2690,8 +2602,9 @@ void HGraph::InsertRepresentationChanges() {
     // Process normal instructions.
     HInstruction* current = blocks_[i]->first();
     while (current != NULL) {
+      HInstruction* next = current->next();
       InsertRepresentationChangesForValue(current);
-      current = current->next();
+      current = next;
     }
   }
 }
@@ -2763,17 +2676,18 @@ bool Uint32Analysis::IsSafeUint32Use(HValue* val, HValue* use) {
   } else if (use->IsChange() || use->IsSimulate()) {
     // Conversions and deoptimization have special support for unt32.
     return true;
-  } else if (use->IsStoreKeyedSpecializedArrayElement()) {
-    // Storing a value into an external integer array is a bit level operation.
-    HStoreKeyedSpecializedArrayElement* store =
-        HStoreKeyedSpecializedArrayElement::cast(use);
-
-    if (store->value() == val) {
-      // Clamping or a conversion to double should have beed inserted.
-      ASSERT(store->elements_kind() != EXTERNAL_PIXEL_ELEMENTS);
-      ASSERT(store->elements_kind() != EXTERNAL_FLOAT_ELEMENTS);
-      ASSERT(store->elements_kind() != EXTERNAL_DOUBLE_ELEMENTS);
-      return true;
+  } else if (use->IsStoreKeyed()) {
+    HStoreKeyed* store = HStoreKeyed::cast(use);
+    if (store->is_external()) {
+      // Storing a value into an external integer array is a bit level
+      // operation.
+      if (store->value() == val) {
+        // Clamping or a conversion to double should have beed inserted.
+        ASSERT(store->elements_kind() != EXTERNAL_PIXEL_ELEMENTS);
+        ASSERT(store->elements_kind() != EXTERNAL_FLOAT_ELEMENTS);
+        ASSERT(store->elements_kind() != EXTERNAL_DOUBLE_ELEMENTS);
+        return true;
+      }
     }
   }
 
@@ -3085,7 +2999,9 @@ void TestContext::ReturnValue(HValue* value) {
 void EffectContext::ReturnInstruction(HInstruction* instr, BailoutId ast_id) {
   ASSERT(!instr->IsControlInstruction());
   owner()->AddInstruction(instr);
-  if (instr->HasObservableSideEffects()) owner()->AddSimulate(ast_id);
+  if (instr->HasObservableSideEffects()) {
+    owner()->AddSimulate(ast_id, REMOVABLE_SIMULATE);
+  }
 }
 
 
@@ -3109,7 +3025,9 @@ void ValueContext::ReturnInstruction(HInstruction* instr, BailoutId ast_id) {
   }
   owner()->AddInstruction(instr);
   owner()->Push(instr);
-  if (instr->HasObservableSideEffects()) owner()->AddSimulate(ast_id);
+  if (instr->HasObservableSideEffects()) {
+    owner()->AddSimulate(ast_id, REMOVABLE_SIMULATE);
+  }
 }
 
 
@@ -3141,7 +3059,7 @@ void TestContext::ReturnInstruction(HInstruction* instr, BailoutId ast_id) {
   // this one isn't actually needed (and wouldn't work if it were targeted).
   if (instr->HasObservableSideEffects()) {
     builder->Push(instr);
-    builder->AddSimulate(ast_id);
+    builder->AddSimulate(ast_id, REMOVABLE_SIMULATE);
     builder->Pop();
   }
   BuildBranch(instr);
@@ -3319,9 +3237,8 @@ HGraph* HGraphBuilder::CreateGraph() {
     // optimization. Disable optimistic LICM in that case.
     Handle<Code> unoptimized_code(info()->shared_info()->code());
     ASSERT(unoptimized_code->kind() == Code::FUNCTION);
-    Handle<Object> maybe_type_info(unoptimized_code->type_feedback_info());
     Handle<TypeFeedbackInfo> type_info(
-        Handle<TypeFeedbackInfo>::cast(maybe_type_info));
+        TypeFeedbackInfo::cast(unoptimized_code->type_feedback_info()));
     int checksum = type_info->own_type_change_checksum();
     int composite_checksum = graph()->update_type_change_checksum(checksum);
     graph()->set_use_optimistic_licm(
@@ -3368,6 +3285,11 @@ bool HGraph::Optimize(SmartArrayPointer<char>* bailout_reason) {
   HInferRepresentation rep(this);
   rep.Analyze();
 
+  // Remove HSimulate instructions that have turned out not to be needed
+  // after all by folding them into the following HSimulate.
+  // This must happen after inferring representations.
+  MergeRemovableSimulates();
+
   MarkDeoptimizeOnUndefined();
   InsertRepresentationChanges();
 
@@ -3406,6 +3328,7 @@ bool HGraph::Optimize(SmartArrayPointer<char>* bailout_reason) {
 
   EliminateRedundantBoundsChecks();
   DehoistSimpleArrayIndexComputations();
+  if (FLAG_dead_code_elimination) DeadCodeElimination();
 
   return true;
 }
@@ -3432,6 +3355,8 @@ class BoundsCheckKey : public ZoneObject {
   static BoundsCheckKey* Create(Zone* zone,
                                 HBoundsCheck* check,
                                 int32_t* offset) {
+    if (!check->index()->representation().IsInteger32()) return NULL;
+
     HValue* index_base = NULL;
     HConstant* constant = NULL;
     bool is_sub = false;
@@ -3613,7 +3538,10 @@ class BoundsCheckBbData: public ZoneObject {
        HConstant(new_offset, Representation::Integer32());
     if (*add == NULL) {
       new_constant->InsertBefore(check);
-      *add = new(BasicBlock()->zone()) HAdd(NULL,
+      // Because of the bounds checks elimination algorithm, the index is always
+      // an HAdd or an HSub here, so we can safely cast to an HBinaryOperation.
+      HValue* context = HBinaryOperation::cast(check->index())->context();
+      *add = new(BasicBlock()->zone()) HAdd(context,
                                             original_value,
                                             new_constant);
       (*add)->AssumeRepresentation(representation);
@@ -3682,6 +3610,7 @@ void HGraph::EliminateRedundantBoundsChecks(HBasicBlock* bb,
     int32_t offset;
     BoundsCheckKey* key =
         BoundsCheckKey::Create(zone(), check, &offset);
+    if (key == NULL) continue;
     BoundsCheckBbData** data_p = table->LookupOrInsert(key, zone());
     BoundsCheckBbData* data = *data_p;
     if (data == NULL) {
@@ -3743,6 +3672,7 @@ void HGraph::EliminateRedundantBoundsChecks() {
 
 static void DehoistArrayIndex(ArrayInstructionInterface* array_operation) {
   HValue* index = array_operation->GetKey();
+  if (!index->representation().IsInteger32()) return;
 
   HConstant* constant;
   HValue* subexpression;
@@ -3797,27 +3727,11 @@ void HGraph::DehoistSimpleArrayIndexComputations() {
         instr != NULL;
         instr = instr->next()) {
       ArrayInstructionInterface* array_instruction = NULL;
-      if (instr->IsLoadKeyedFastElement()) {
-        HLoadKeyedFastElement* op = HLoadKeyedFastElement::cast(instr);
-        array_instruction = static_cast<ArrayInstructionInterface*>(op);
-      } else if (instr->IsLoadKeyedFastDoubleElement()) {
-        HLoadKeyedFastDoubleElement* op =
-            HLoadKeyedFastDoubleElement::cast(instr);
+      if (instr->IsLoadKeyed()) {
+        HLoadKeyed* op = HLoadKeyed::cast(instr);
         array_instruction = static_cast<ArrayInstructionInterface*>(op);
-      } else if (instr->IsLoadKeyedSpecializedArrayElement()) {
-        HLoadKeyedSpecializedArrayElement* op =
-            HLoadKeyedSpecializedArrayElement::cast(instr);
-        array_instruction = static_cast<ArrayInstructionInterface*>(op);
-      } else if (instr->IsStoreKeyedFastElement()) {
-        HStoreKeyedFastElement* op = HStoreKeyedFastElement::cast(instr);
-        array_instruction = static_cast<ArrayInstructionInterface*>(op);
-      } else if (instr->IsStoreKeyedFastDoubleElement()) {
-        HStoreKeyedFastDoubleElement* op =
-            HStoreKeyedFastDoubleElement::cast(instr);
-        array_instruction = static_cast<ArrayInstructionInterface*>(op);
-      } else if (instr->IsStoreKeyedSpecializedArrayElement()) {
-        HStoreKeyedSpecializedArrayElement* op =
-            HStoreKeyedSpecializedArrayElement::cast(instr);
+      } else if (instr->IsStoreKeyed()) {
+        HStoreKeyed* op = HStoreKeyed::cast(instr);
         array_instruction = static_cast<ArrayInstructionInterface*>(op);
       } else {
         continue;
@@ -3828,6 +3742,36 @@ void HGraph::DehoistSimpleArrayIndexComputations() {
 }
 
 
+void HGraph::DeadCodeElimination() {
+  HPhase phase("H_Dead code elimination", this);
+  ZoneList<HInstruction*> worklist(blocks_.length(), zone());
+  for (int i = 0; i < blocks()->length(); ++i) {
+    for (HInstruction* instr = blocks()->at(i)->first();
+         instr != NULL;
+         instr = instr->next()) {
+      if (instr->IsDead()) worklist.Add(instr, zone());
+    }
+  }
+
+  while (!worklist.is_empty()) {
+    HInstruction* instr = worklist.RemoveLast();
+    if (FLAG_trace_dead_code_elimination) {
+      HeapStringAllocator allocator;
+      StringStream stream(&allocator);
+      instr->PrintNameTo(&stream);
+      stream.Add(" = ");
+      instr->PrintTo(&stream);
+      PrintF("[removing dead instruction %s]\n", *stream.ToCString());
+    }
+    instr->DeleteAndReplaceWith(NULL);
+    for (int i = 0; i < instr->OperandCount(); ++i) {
+      HValue* operand = instr->OperandAt(i);
+      if (operand->IsDead()) worklist.Add(HInstruction::cast(operand), zone());
+    }
+  }
+}
+
+
 HInstruction* HGraphBuilder::AddInstruction(HInstruction* instr) {
   ASSERT(current_block() != NULL);
   current_block()->AddInstruction(instr);
@@ -3835,9 +3779,9 @@ HInstruction* HGraphBuilder::AddInstruction(HInstruction* instr) {
 }
 
 
-void HGraphBuilder::AddSimulate(BailoutId ast_id) {
+void HGraphBuilder::AddSimulate(BailoutId ast_id, RemovableSimulate removable) {
   ASSERT(current_block() != NULL);
-  current_block()->AddSimulate(ast_id);
+  current_block()->AddSimulate(ast_id, removable);
 }
 
 
@@ -4194,7 +4138,7 @@ void HGraphBuilder::VisitSwitchStatement(SwitchStatement* stmt) {
                 !clause->label()->IsStringLiteral()) ||
                (switch_type == SMI_SWITCH &&
                 !clause->label()->IsSmiLiteral())) {
-      return Bailout("SwitchStatemnt: mixed label types are not supported");
+      return Bailout("SwitchStatement: mixed label types are not supported");
     }
   }
 
@@ -4248,12 +4192,13 @@ void HGraphBuilder::VisitSwitchStatement(SwitchStatement* stmt) {
           new(zone()) HCompareIDAndBranch(tag_value,
                                           label_value,
                                           Token::EQ_STRICT);
-      compare_->SetInputRepresentation(Representation::Integer32());
+      compare_->set_observed_input_representation(
+          Representation::Integer32(), Representation::Integer32());
       compare = compare_;
     } else {
       compare = new(zone()) HStringCompareAndBranch(context, tag_value,
-                                                     label_value,
-                                                     Token::EQ_STRICT);
+                                                    label_value,
+                                                    Token::EQ_STRICT);
     }
 
     compare->SetSuccessorAt(0, body_block);
@@ -4612,7 +4557,8 @@ void HGraphBuilder::VisitForInStatement(ForInStatement* stmt) {
   // Check that we still have more keys.
   HCompareIDAndBranch* compare_index =
       new(zone()) HCompareIDAndBranch(index, limit, Token::LT);
-  compare_index->SetInputRepresentation(Representation::Integer32());
+  compare_index->set_observed_input_representation(
+      Representation::Integer32(), Representation::Integer32());
 
   HBasicBlock* loop_body = graph()->CreateBasicBlock();
   HBasicBlock* loop_successor = graph()->CreateBasicBlock();
@@ -4627,10 +4573,11 @@ void HGraphBuilder::VisitForInStatement(ForInStatement* stmt) {
   set_current_block(loop_body);
 
   HValue* key = AddInstruction(
-      new(zone()) HLoadKeyedFastElement(
+      new(zone()) HLoadKeyed(
           environment()->ExpressionStackAt(2),  // Enum cache.
           environment()->ExpressionStackAt(0),  // Iteration index.
-          environment()->ExpressionStackAt(0)));
+          environment()->ExpressionStackAt(0),
+          FAST_ELEMENTS));
 
   // Check if the expected map still matches that of the enumerable.
   // If not just deoptimize.
@@ -4886,7 +4833,7 @@ void HGraphBuilder::VisitLiteral(Literal* expr) {
   ASSERT(current_block() != NULL);
   ASSERT(current_block()->HasPredecessor());
   HConstant* instr =
-      new(zone()) HConstant(expr->handle(), Representation::Tagged());
+      new(zone()) HConstant(expr->handle(), Representation::None());
   return ast_context()->ReturnInstruction(instr, expr->id());
 }
 
@@ -5123,7 +5070,9 @@ void HGraphBuilder::VisitObjectLiteral(ObjectLiteral* expr) {
                                                              map));
             }
             AddInstruction(store);
-            if (store->HasObservableSideEffects()) AddSimulate(key->id());
+            if (store->HasObservableSideEffects()) {
+              AddSimulate(key->id(), REMOVABLE_SIMULATE);
+            }
           } else {
             CHECK_ALIVE(VisitForEffect(value));
           }
@@ -5235,18 +5184,14 @@ void HGraphBuilder::VisitArrayLiteral(ArrayLiteral* expr) {
         // Fall through.
       case FAST_ELEMENTS:
       case FAST_HOLEY_ELEMENTS:
-        AddInstruction(new(zone()) HStoreKeyedFastElement(
+      case FAST_DOUBLE_ELEMENTS:
+      case FAST_HOLEY_DOUBLE_ELEMENTS:
+        AddInstruction(new(zone()) HStoreKeyed(
             elements,
             key,
             value,
             boilerplate_elements_kind));
         break;
-      case FAST_DOUBLE_ELEMENTS:
-      case FAST_HOLEY_DOUBLE_ELEMENTS:
-        AddInstruction(new(zone()) HStoreKeyedFastDoubleElement(elements,
-                                                                key,
-                                                                value));
-        break;
       default:
         UNREACHABLE();
         break;
@@ -5291,18 +5236,19 @@ static int ComputeLoadStoreFieldIndex(Handle<Map> type,
 }
 
 
+void HGraphBuilder::AddCheckMapsWithTransitions(HValue* object,
+                                                Handle<Map> map) {
+  AddInstruction(new(zone()) HCheckNonSmi(object));
+  AddInstruction(HCheckMaps::NewWithTransitions(object, map, zone()));
+}
+
+
 HInstruction* HGraphBuilder::BuildStoreNamedField(HValue* object,
                                                   Handle<String> name,
                                                   HValue* value,
                                                   Handle<Map> map,
-                                                  LookupResult* lookup,
-                                                  bool smi_and_map_check) {
+                                                  LookupResult* lookup) {
   ASSERT(lookup->IsFound());
-  if (smi_and_map_check) {
-    AddInstruction(new(zone()) HCheckNonSmi(object));
-    AddInstruction(HCheckMaps::NewWithTransitions(object, map, zone()));
-  }
-
   // If the property does not exist yet, we have to check that it wasn't made
   // readonly or turned into a setter by some meanwhile modifications on the
   // prototype chain.
@@ -5371,7 +5317,7 @@ HInstruction* HGraphBuilder::BuildCallSetter(HValue* object,
                                              Handle<Map> map,
                                              Handle<JSFunction> setter,
                                              Handle<JSObject> holder) {
-  AddCheckConstantFunction(holder, object, map, true);
+  AddCheckConstantFunction(holder, object, map);
   AddInstruction(new(zone()) HPushArgument(object));
   AddInstruction(new(zone()) HPushArgument(value));
   return new(zone()) HCallConstantFunction(setter, 2);
@@ -5385,8 +5331,8 @@ HInstruction* HGraphBuilder::BuildStoreNamedMonomorphic(HValue* object,
   // Handle a store to a known field.
   LookupResult lookup(isolate());
   if (ComputeLoadStoreField(map, name, &lookup, true)) {
-    // true = needs smi and map check.
-    return BuildStoreNamedField(object, name, value, map, &lookup, true);
+    AddCheckMapsWithTransitions(object, map);
+    return BuildStoreNamedField(object, name, value, map, &lookup);
   }
 
   // No luck, do a generic store.
@@ -5434,7 +5380,7 @@ void HGraphBuilder::HandlePolymorphicLoadNamedField(Property* expr,
   HInstruction* instr;
   if (count == types->length() && is_monomorphic_field) {
     AddInstruction(new(zone()) HCheckMaps(object, types, zone()));
-    instr = BuildLoadNamedField(object, map, &lookup, false);
+    instr = BuildLoadNamedField(object, map, &lookup);
   } else {
     HValue* context = environment()->LookupContext();
     instr = new(zone()) HLoadNamedFieldPolymorphic(context,
@@ -5477,7 +5423,7 @@ void HGraphBuilder::HandlePolymorphicStoreNamedField(Assignment* expr,
       set_current_block(if_true);
       HInstruction* instr;
       CHECK_ALIVE(instr =
-          BuildStoreNamedField(object, name, value, map, &lookup, false));
+          BuildStoreNamedField(object, name, value, map, &lookup));
       instr->set_position(expr->position());
       // Goto will add the HSimulate for the store.
       AddInstruction(instr);
@@ -5507,10 +5453,10 @@ void HGraphBuilder::HandlePolymorphicStoreNamedField(Assignment* expr,
       // unoptimized code).
       if (instr->HasObservableSideEffects()) {
         if (ast_context()->IsEffect()) {
-          AddSimulate(expr->id());
+          AddSimulate(expr->id(), REMOVABLE_SIMULATE);
         } else {
           Push(value);
-          AddSimulate(expr->id());
+          AddSimulate(expr->id(), REMOVABLE_SIMULATE);
           Drop(1);
         }
       }
@@ -5553,7 +5499,7 @@ void HGraphBuilder::HandlePropertyAssignment(Assignment* expr) {
       Handle<JSFunction> setter;
       Handle<JSObject> holder;
       if (LookupSetter(map, name, &setter, &holder)) {
-        AddCheckConstantFunction(holder, object, map, true);
+        AddCheckConstantFunction(holder, object, map);
         if (FLAG_inline_accessors && TryInlineSetter(setter, expr, value)) {
           return;
         }
@@ -5580,7 +5526,9 @@ void HGraphBuilder::HandlePropertyAssignment(Assignment* expr) {
     Push(value);
     instr->set_position(expr->position());
     AddInstruction(instr);
-    if (instr->HasObservableSideEffects()) AddSimulate(expr->AssignmentId());
+    if (instr->HasObservableSideEffects()) {
+      AddSimulate(expr->AssignmentId(), REMOVABLE_SIMULATE);
+    }
     return ast_context()->ReturnValue(Pop());
 
   } else {
@@ -5597,7 +5545,7 @@ void HGraphBuilder::HandlePropertyAssignment(Assignment* expr) {
                              &has_side_effects);
     Push(value);
     ASSERT(has_side_effects);  // Stores always have side effects.
-    AddSimulate(expr->AssignmentId());
+    AddSimulate(expr->AssignmentId(), REMOVABLE_SIMULATE);
     return ast_context()->ReturnValue(Pop());
   }
 }
@@ -5619,7 +5567,9 @@ void HGraphBuilder::HandleGlobalVariableAssignment(Variable* var,
         new(zone()) HStoreGlobalCell(value, cell, lookup.GetPropertyDetails());
     instr->set_position(position);
     AddInstruction(instr);
-    if (instr->HasObservableSideEffects()) AddSimulate(ast_id);
+    if (instr->HasObservableSideEffects()) {
+      AddSimulate(ast_id, REMOVABLE_SIMULATE);
+    }
   } else {
     HValue* context =  environment()->LookupContext();
     HGlobalObject* global_object = new(zone()) HGlobalObject(context);
@@ -5633,7 +5583,7 @@ void HGraphBuilder::HandleGlobalVariableAssignment(Variable* var,
     instr->set_position(position);
     AddInstruction(instr);
     ASSERT(instr->HasObservableSideEffects());
-    if (instr->HasObservableSideEffects()) AddSimulate(ast_id);
+    AddSimulate(ast_id, REMOVABLE_SIMULATE);
   }
 }
 
@@ -5710,7 +5660,7 @@ void HGraphBuilder::HandleCompoundAssignment(Assignment* expr) {
             new(zone()) HStoreContextSlot(context, var->index(), mode, Top());
         AddInstruction(instr);
         if (instr->HasObservableSideEffects()) {
-          AddSimulate(expr->AssignmentId());
+          AddSimulate(expr->AssignmentId(), REMOVABLE_SIMULATE);
         }
         break;
       }
@@ -5750,7 +5700,9 @@ void HGraphBuilder::HandleCompoundAssignment(Assignment* expr) {
         load = BuildLoadNamedGeneric(object, name, prop);
       }
       PushAndAdd(load);
-      if (load->HasObservableSideEffects()) AddSimulate(prop->LoadId());
+      if (load->HasObservableSideEffects()) {
+        AddSimulate(prop->LoadId(), REMOVABLE_SIMULATE);
+      }
 
       CHECK_ALIVE(VisitForValue(expr->value()));
       HValue* right = Pop();
@@ -5758,7 +5710,9 @@ void HGraphBuilder::HandleCompoundAssignment(Assignment* expr) {
 
       HInstruction* instr = BuildBinaryOperation(operation, left, right);
       PushAndAdd(instr);
-      if (instr->HasObservableSideEffects()) AddSimulate(operation->id());
+      if (instr->HasObservableSideEffects()) {
+        AddSimulate(operation->id(), REMOVABLE_SIMULATE);
+      }
 
       HInstruction* store;
       if (!monomorphic) {
@@ -5780,7 +5734,9 @@ void HGraphBuilder::HandleCompoundAssignment(Assignment* expr) {
       // Drop the simulated receiver and value.  Return the value.
       Drop(2);
       Push(instr);
-      if (store->HasObservableSideEffects()) AddSimulate(expr->AssignmentId());
+      if (store->HasObservableSideEffects()) {
+        AddSimulate(expr->AssignmentId(), REMOVABLE_SIMULATE);
+      }
       return ast_context()->ReturnValue(Pop());
 
     } else {
@@ -5796,7 +5752,7 @@ void HGraphBuilder::HandleCompoundAssignment(Assignment* expr) {
           false,  // is_store
           &has_side_effects);
       Push(load);
-      if (has_side_effects) AddSimulate(prop->LoadId());
+      if (has_side_effects) AddSimulate(prop->LoadId(), REMOVABLE_SIMULATE);
 
 
       CHECK_ALIVE(VisitForValue(expr->value()));
@@ -5805,7 +5761,9 @@ void HGraphBuilder::HandleCompoundAssignment(Assignment* expr) {
 
       HInstruction* instr = BuildBinaryOperation(operation, left, right);
       PushAndAdd(instr);
-      if (instr->HasObservableSideEffects()) AddSimulate(operation->id());
+      if (instr->HasObservableSideEffects()) {
+        AddSimulate(operation->id(), REMOVABLE_SIMULATE);
+      }
 
       expr->RecordTypeFeedback(oracle(), zone());
       HandleKeyedElementAccess(obj, key, instr, expr, expr->AssignmentId(),
@@ -5817,7 +5775,7 @@ void HGraphBuilder::HandleCompoundAssignment(Assignment* expr) {
       Drop(3);
       Push(instr);
       ASSERT(has_side_effects);  // Stores always have side effects.
-      AddSimulate(expr->AssignmentId());
+      AddSimulate(expr->AssignmentId(), REMOVABLE_SIMULATE);
       return ast_context()->ReturnValue(Pop());
     }
 
@@ -5940,7 +5898,7 @@ void HGraphBuilder::VisitAssignment(Assignment* expr) {
             context, var->index(), mode, Top());
         AddInstruction(instr);
         if (instr->HasObservableSideEffects()) {
-          AddSimulate(expr->AssignmentId());
+          AddSimulate(expr->AssignmentId(), REMOVABLE_SIMULATE);
         }
         return ast_context()->ReturnValue(Pop());
       }
@@ -5977,13 +5935,7 @@ void HGraphBuilder::VisitThrow(Throw* expr) {
 
 HLoadNamedField* HGraphBuilder::BuildLoadNamedField(HValue* object,
                                                     Handle<Map> map,
-                                                    LookupResult* lookup,
-                                                    bool smi_and_map_check) {
-  if (smi_and_map_check) {
-    AddInstruction(new(zone()) HCheckNonSmi(object));
-    AddInstruction(HCheckMaps::NewWithTransitions(object, map, zone()));
-  }
-
+                                                    LookupResult* lookup) {
   int index = lookup->GetLocalFieldIndexFromMap(*map);
   if (index < 0) {
     // Negative property indices are in-object properties, indexed
@@ -6014,7 +5966,7 @@ HInstruction* HGraphBuilder::BuildCallGetter(HValue* object,
                                              Handle<Map> map,
                                              Handle<JSFunction> getter,
                                              Handle<JSObject> holder) {
-  AddCheckConstantFunction(holder, object, map, true);
+  AddCheckConstantFunction(holder, object, map);
   AddInstruction(new(zone()) HPushArgument(object));
   return new(zone()) HCallConstantFunction(getter, 1);
 }
@@ -6029,17 +5981,29 @@ HInstruction* HGraphBuilder::BuildLoadNamedMonomorphic(HValue* object,
   LookupResult lookup(isolate());
   map->LookupDescriptor(NULL, *name, &lookup);
   if (lookup.IsField()) {
-    return BuildLoadNamedField(object, map, &lookup, true);
+    AddCheckMapsWithTransitions(object, map);
+    return BuildLoadNamedField(object, map, &lookup);
   }
 
   // Handle a load of a constant known function.
   if (lookup.IsConstantFunction()) {
-    AddInstruction(new(zone()) HCheckNonSmi(object));
-    AddInstruction(HCheckMaps::NewWithTransitions(object, map, zone()));
+    AddCheckMapsWithTransitions(object, map);
     Handle<JSFunction> function(lookup.GetConstantFunctionFromMap(*map));
     return new(zone()) HConstant(function, Representation::Tagged());
   }
 
+  // Handle a load from a known field somewhere in the protoype chain.
+  LookupInPrototypes(map, name, &lookup);
+  if (lookup.IsField()) {
+    Handle<JSObject> prototype(JSObject::cast(map->prototype()));
+    Handle<JSObject> holder(lookup.holder());
+    Handle<Map> holder_map(holder->map());
+    AddCheckMapsWithTransitions(object, map);
+    HInstruction* holder_value =
+        AddInstruction(new(zone()) HCheckPrototypeMaps(prototype, holder));
+    return BuildLoadNamedField(holder_value, holder_map, &lookup);
+  }
+
   // No luck, do a generic load.
   return BuildLoadNamedGeneric(object, name, expr);
 }
@@ -6072,13 +6036,6 @@ HInstruction* HGraphBuilder::BuildExternalArrayElementAccess(
       case EXTERNAL_UNSIGNED_SHORT_ELEMENTS:
       case EXTERNAL_INT_ELEMENTS:
       case EXTERNAL_UNSIGNED_INT_ELEMENTS: {
-        if (!val->representation().IsInteger32()) {
-          val = AddInstruction(new(zone()) HChange(
-              val,
-              Representation::Integer32(),
-              true,  // Truncate to int32.
-              false));  // Don't deoptimize undefined (irrelevant here).
-        }
         break;
       }
       case EXTERNAL_FLOAT_ELEMENTS:
@@ -6095,13 +6052,15 @@ HInstruction* HGraphBuilder::BuildExternalArrayElementAccess(
         UNREACHABLE();
         break;
     }
-    return new(zone()) HStoreKeyedSpecializedArrayElement(
-        external_elements, checked_key, val, elements_kind);
+    return new(zone()) HStoreKeyed(external_elements,
+                                   checked_key,
+                                   val,
+                                   elements_kind);
   } else {
     ASSERT(val == NULL);
-    HLoadKeyedSpecializedArrayElement* load =
-       new(zone()) HLoadKeyedSpecializedArrayElement(
-          external_elements, checked_key, dependency, elements_kind);
+    HLoadKeyed* load =
+       new(zone()) HLoadKeyed(
+           external_elements, checked_key, dependency, elements_kind);
     if (FLAG_opt_safe_uint32_operations &&
         elements_kind == EXTERNAL_UNSIGNED_INT_ELEMENTS) {
       graph()->RecordUint32Instruction(load);
@@ -6120,10 +6079,6 @@ HInstruction* HGraphBuilder::BuildFastElementAccess(HValue* elements,
   if (is_store) {
     ASSERT(val != NULL);
     switch (elements_kind) {
-      case FAST_DOUBLE_ELEMENTS:
-      case FAST_HOLEY_DOUBLE_ELEMENTS:
-        return new(zone()) HStoreKeyedFastDoubleElement(
-            elements, checked_key, val);
       case FAST_SMI_ELEMENTS:
       case FAST_HOLEY_SMI_ELEMENTS:
         // Smi-only arrays need a smi check.
@@ -6131,7 +6086,9 @@ HInstruction* HGraphBuilder::BuildFastElementAccess(HValue* elements,
         // Fall through.
       case FAST_ELEMENTS:
       case FAST_HOLEY_ELEMENTS:
-        return new(zone()) HStoreKeyedFastElement(
+      case FAST_DOUBLE_ELEMENTS:
+      case FAST_HOLEY_DOUBLE_ELEMENTS:
+        return new(zone()) HStoreKeyed(
             elements, checked_key, val, elements_kind);
       default:
         UNREACHABLE();
@@ -6139,16 +6096,10 @@ HInstruction* HGraphBuilder::BuildFastElementAccess(HValue* elements,
     }
   }
   // It's an element load (!is_store).
-  HoleCheckMode mode = IsFastPackedElementsKind(elements_kind) ?
-      OMIT_HOLE_CHECK :
-      PERFORM_HOLE_CHECK;
-  if (IsFastDoubleElementsKind(elements_kind)) {
-    return new(zone()) HLoadKeyedFastDoubleElement(elements, checked_key,
-                                                   load_dependency, mode);
-  } else {  // Smi or Object elements.
-    return new(zone()) HLoadKeyedFastElement(elements, checked_key,
-                                             load_dependency, elements_kind);
-  }
+  return new(zone()) HLoadKeyed(elements,
+                                checked_key,
+                                load_dependency,
+                                elements_kind);
 }
 
 
@@ -6375,7 +6326,6 @@ HValue* HGraphBuilder::HandlePolymorphicElementAccess(HValue* object,
 
   HInstruction* elements_kind_instr =
       AddInstruction(new(zone()) HElementsKind(object));
-  HCompareConstantEqAndBranch* elements_kind_branch = NULL;
   HInstruction* elements =
       AddInstruction(new(zone()) HLoadElements(object, checkspec));
   HLoadExternalArrayPointer* external_elements = NULL;
@@ -6406,8 +6356,9 @@ HValue* HGraphBuilder::HandlePolymorphicElementAccess(HValue* object,
     if (type_todo[elements_kind]) {
       HBasicBlock* if_true = graph()->CreateBasicBlock();
       HBasicBlock* if_false = graph()->CreateBasicBlock();
-      elements_kind_branch = new(zone()) HCompareConstantEqAndBranch(
-          elements_kind_instr, elements_kind, Token::EQ_STRICT);
+      HCompareConstantEqAndBranch* elements_kind_branch =
+          new(zone()) HCompareConstantEqAndBranch(
+              elements_kind_instr, elements_kind, Token::EQ_STRICT);
       elements_kind_branch->SetSuccessorAt(0, if_true);
       elements_kind_branch->SetSuccessorAt(1, if_false);
       current_block()->Finish(elements_kind_branch);
@@ -6549,6 +6500,7 @@ void HGraphBuilder::EnsureArgumentsArePushedForAccess() {
 
   // Push arguments when entering inlined function.
   HEnterInlined* entry = function_state()->entry();
+  entry->set_arguments_pushed();
 
   ZoneList<HValue*>* arguments_values = entry->arguments_values();
 
@@ -6678,7 +6630,7 @@ void HGraphBuilder::VisitProperty(Property* expr) {
       Handle<JSFunction> getter;
       Handle<JSObject> holder;
       if (LookupGetter(map, name, &getter, &holder)) {
-        AddCheckConstantFunction(holder, Top(), map, true);
+        AddCheckConstantFunction(holder, Top(), map);
         if (FLAG_inline_accessors && TryInlineGetter(getter, expr)) return;
         AddInstruction(new(zone()) HPushArgument(Pop()));
         instr = new(zone()) HCallConstantFunction(getter, 1);
@@ -6704,10 +6656,10 @@ void HGraphBuilder::VisitProperty(Property* expr) {
         &has_side_effects);
     if (has_side_effects) {
       if (ast_context()->IsEffect()) {
-        AddSimulate(expr->id());
+        AddSimulate(expr->id(), REMOVABLE_SIMULATE);
       } else {
         Push(load);
-        AddSimulate(expr->id());
+        AddSimulate(expr->id(), REMOVABLE_SIMULATE);
         Drop(1);
       }
     }
@@ -6718,22 +6670,23 @@ void HGraphBuilder::VisitProperty(Property* expr) {
 }
 
 
+void HGraphBuilder::AddCheckPrototypeMaps(Handle<JSObject> holder,
+                                          Handle<Map> receiver_map) {
+  if (!holder.is_null()) {
+    AddInstruction(new(zone()) HCheckPrototypeMaps(
+        Handle<JSObject>(JSObject::cast(receiver_map->prototype())), holder));
+  }
+}
+
+
 void HGraphBuilder::AddCheckConstantFunction(Handle<JSObject> holder,
                                              HValue* receiver,
-                                             Handle<Map> receiver_map,
-                                             bool smi_and_map_check) {
+                                             Handle<Map> receiver_map) {
   // Constant functions have the nice property that the map will change if they
   // are overwritten.  Therefore it is enough to check the map of the holder and
   // its prototypes.
-  if (smi_and_map_check) {
-    AddInstruction(new(zone()) HCheckNonSmi(receiver));
-    AddInstruction(HCheckMaps::NewWithTransitions(receiver, receiver_map,
-                                                  zone()));
-  }
-  if (!holder.is_null()) {
-    AddInstruction(new(zone()) HCheckPrototypeMaps(
-        Handle<JSObject>(JSObject::cast(receiver_map->prototype())), holder));
-  }
+  AddCheckMapsWithTransitions(receiver, receiver_map);
+  AddCheckPrototypeMaps(holder, receiver_map);
 }
 
 
@@ -6815,7 +6768,7 @@ void HGraphBuilder::HandlePolymorphicCallNamed(Call* expr,
 
     set_current_block(if_true);
     expr->ComputeTarget(map, name);
-    AddCheckConstantFunction(expr->holder(), receiver, map, false);
+    AddCheckPrototypeMaps(expr->holder(), map);
     if (FLAG_trace_inlining && FLAG_polymorphic_inlining) {
       Handle<JSFunction> caller = info()->closure();
       SmartArrayPointer<char> caller_name =
@@ -7161,9 +7114,8 @@ bool HGraphBuilder::TryInline(CallKind call_kind,
   inlined_count_ += nodes_added;
 
   ASSERT(unoptimized_code->kind() == Code::FUNCTION);
-  Handle<Object> maybe_type_info(unoptimized_code->type_feedback_info());
   Handle<TypeFeedbackInfo> type_info(
-      Handle<TypeFeedbackInfo>::cast(maybe_type_info));
+      TypeFeedbackInfo::cast(unoptimized_code->type_feedback_info()));
   graph()->update_type_change_checksum(type_info->own_type_change_checksum());
 
   TraceInline(target, caller, NULL);
@@ -7301,6 +7253,9 @@ bool HGraphBuilder::TryInlineBuiltinFunctionCall(Call* expr, bool drop_extra) {
   if (!expr->target()->shared()->HasBuiltinFunctionId()) return false;
   BuiltinFunctionId id = expr->target()->shared()->builtin_function_id();
   switch (id) {
+    case kMathExp:
+      if (!FLAG_fast_math) break;
+      // Fall through if FLAG_fast_math.
     case kMathRound:
     case kMathAbs:
     case kMathSqrt:
@@ -7361,6 +7316,9 @@ bool HGraphBuilder::TryInlineBuiltinMethodCall(Call* expr,
         return true;
       }
       break;
+    case kMathExp:
+      if (!FLAG_fast_math) break;
+      // Fall through if FLAG_fast_math.
     case kMathRound:
     case kMathFloor:
     case kMathAbs:
@@ -7370,7 +7328,7 @@ bool HGraphBuilder::TryInlineBuiltinMethodCall(Call* expr,
     case kMathCos:
     case kMathTan:
       if (argument_count == 2 && check_type == RECEIVER_MAP_CHECK) {
-        AddCheckConstantFunction(expr->holder(), receiver, receiver_map, true);
+        AddCheckConstantFunction(expr->holder(), receiver, receiver_map);
         HValue* argument = Pop();
         HValue* context = environment()->LookupContext();
         Drop(1);  // Receiver.
@@ -7383,7 +7341,7 @@ bool HGraphBuilder::TryInlineBuiltinMethodCall(Call* expr,
       break;
     case kMathPow:
       if (argument_count == 3 && check_type == RECEIVER_MAP_CHECK) {
-        AddCheckConstantFunction(expr->holder(), receiver, receiver_map, true);
+        AddCheckConstantFunction(expr->holder(), receiver, receiver_map);
         HValue* right = Pop();
         HValue* left = Pop();
         Pop();  // Pop receiver.
@@ -7425,7 +7383,7 @@ bool HGraphBuilder::TryInlineBuiltinMethodCall(Call* expr,
       break;
     case kMathRandom:
       if (argument_count == 1 && check_type == RECEIVER_MAP_CHECK) {
-        AddCheckConstantFunction(expr->holder(), receiver, receiver_map, true);
+        AddCheckConstantFunction(expr->holder(), receiver, receiver_map);
         Drop(1);  // Receiver.
         HValue* context = environment()->LookupContext();
         HGlobalObject* global_object = new(zone()) HGlobalObject(context);
@@ -7438,7 +7396,7 @@ bool HGraphBuilder::TryInlineBuiltinMethodCall(Call* expr,
     case kMathMax:
     case kMathMin:
       if (argument_count == 3 && check_type == RECEIVER_MAP_CHECK) {
-        AddCheckConstantFunction(expr->holder(), receiver, receiver_map, true);
+        AddCheckConstantFunction(expr->holder(), receiver, receiver_map);
         HValue* right = Pop();
         HValue* left = Pop();
         Drop(1);  // Receiver.
@@ -7487,7 +7445,7 @@ bool HGraphBuilder::TryCallApply(Call* expr) {
   VisitForValue(prop->obj());
   if (HasStackOverflow() || current_block() == NULL) return true;
   HValue* function = Top();
-  AddCheckConstantFunction(expr->holder(), function, function_map, true);
+  AddCheckConstantFunction(expr->holder(), function, function_map);
   Drop(1);
 
   VisitForValue(args->at(0));
@@ -7537,6 +7495,55 @@ bool HGraphBuilder::TryCallApply(Call* expr) {
 }
 
 
+// Checks if all maps in |types| are from the same family, i.e., are elements
+// transitions of each other. Returns either NULL if they are not from the same
+// family, or a Map* indicating the map with the first elements kind of the
+// family that is in the list.
+static Map* CheckSameElementsFamily(SmallMapList* types) {
+  if (types->length() <= 1) return NULL;
+  // Check if all maps belong to the same transition family.
+  Map* kinds[kFastElementsKindCount];
+  Map* first_map = *types->first();
+  ElementsKind first_kind = first_map->elements_kind();
+  if (!IsFastElementsKind(first_kind)) return NULL;
+  int first_index = GetSequenceIndexFromFastElementsKind(first_kind);
+  int last_index = first_index;
+
+  for (int i = 0; i < kFastElementsKindCount; i++) kinds[i] = NULL;
+
+  kinds[first_index] = first_map;
+
+  for (int i = 1; i < types->length(); ++i) {
+    Map* map = *types->at(i);
+    ElementsKind elements_kind = map->elements_kind();
+    if (!IsFastElementsKind(elements_kind)) return NULL;
+    int index = GetSequenceIndexFromFastElementsKind(elements_kind);
+    if (index < first_index) {
+      first_index = index;
+    } else if (index > last_index) {
+      last_index = index;
+    } else if (kinds[index] != map) {
+      return NULL;
+    }
+    kinds[index] = map;
+  }
+
+  Map* current = kinds[first_index];
+  for (int i = first_index + 1; i <= last_index; i++) {
+    Map* next = kinds[i];
+    if (next != NULL) {
+      ElementsKind current_kind = next->elements_kind();
+      if (next != current->LookupElementsTransitionMap(current_kind)) {
+        return NULL;
+      }
+      current = next;
+    }
+  }
+
+  return kinds[first_index];
+}
+
+
 void HGraphBuilder::VisitCall(Call* expr) {
   ASSERT(!HasStackOverflow());
   ASSERT(current_block() != NULL);
@@ -7576,15 +7583,25 @@ void HGraphBuilder::VisitCall(Call* expr) {
     CHECK_ALIVE(VisitExpressions(expr->arguments()));
 
     Handle<String> name = prop->key()->AsLiteral()->AsPropertyName();
-
     SmallMapList* types = expr->GetReceiverTypes();
 
-    HValue* receiver =
-        environment()->ExpressionStackAt(expr->arguments()->length());
-    if (expr->IsMonomorphic()) {
-      Handle<Map> receiver_map = (types == NULL || types->is_empty())
+    bool monomorphic = expr->IsMonomorphic();
+    Handle<Map> receiver_map;
+    if (monomorphic) {
+      receiver_map = (types == NULL || types->is_empty())
           ? Handle<Map>::null()
           : types->first();
+    } else {
+      Map* family_map = CheckSameElementsFamily(types);
+      if (family_map != NULL) {
+        receiver_map = Handle<Map>(family_map);
+        monomorphic = expr->ComputeTarget(receiver_map, name);
+      }
+    }
+
+    HValue* receiver =
+        environment()->ExpressionStackAt(expr->arguments()->length());
+    if (monomorphic) {
       if (TryInlineBuiltinMethodCall(expr,
                                      receiver,
                                      receiver_map,
@@ -7606,7 +7623,7 @@ void HGraphBuilder::VisitCall(Call* expr) {
         call = PreProcessCall(
             new(zone()) HCallNamed(context, name, argument_count));
       } else {
-        AddCheckConstantFunction(expr->holder(), receiver, receiver_map, true);
+        AddCheckConstantFunction(expr->holder(), receiver, receiver_map);
 
         if (TryInlineCall(expr)) return;
         call = PreProcessCall(
@@ -7629,7 +7646,7 @@ void HGraphBuilder::VisitCall(Call* expr) {
     VariableProxy* proxy = expr->expression()->AsVariableProxy();
     bool global_call = proxy != NULL && proxy->var()->IsUnallocated();
 
-    if (proxy != NULL && proxy->var()->is_possibly_eval()) {
+    if (proxy != NULL && proxy->var()->is_possibly_eval(isolate())) {
       return Bailout("possible direct call to eval");
     }
 
@@ -7955,14 +7972,13 @@ void HGraphBuilder::VisitSub(UnaryOperation* expr) {
   HInstruction* instr =
       new(zone()) HMul(context, value, graph_->GetConstantMinus1());
   TypeInfo info = oracle()->UnaryType(expr);
+  Representation rep = ToRepresentation(info);
   if (info.IsUninitialized()) {
     AddInstruction(new(zone()) HSoftDeoptimize);
     current_block()->MarkAsDeoptimizing();
     info = TypeInfo::Unknown();
   }
-  Representation rep = ToRepresentation(info);
-  TraceRepresentation(expr->op(), info, instr, rep);
-  instr->AssumeRepresentation(rep);
+  HBinaryOperation::cast(instr)->set_observed_input_representation(rep, rep);
   return ast_context()->ReturnInstruction(instr, expr->id());
 }
 
@@ -8051,8 +8067,11 @@ HInstruction* HGraphBuilder::BuildIncrement(bool returns_original_input,
       : graph_->GetConstantMinus1();
   HValue* context = environment()->LookupContext();
   HInstruction* instr = new(zone()) HAdd(context, Top(), delta);
-  TraceRepresentation(expr->op(), info, instr, rep);
+  // We can't insert a simulate here, because it would break deoptimization,
+  // so the HAdd must not have side effects, so we must freeze its
+  // representation.
   instr->AssumeRepresentation(rep);
+  instr->ClearAllSideEffects();
   AddInstruction(instr);
   return instr;
 }
@@ -8126,7 +8145,7 @@ void HGraphBuilder::VisitCountOperation(CountOperation* expr) {
             new(zone()) HStoreContextSlot(context, var->index(), mode, after);
         AddInstruction(instr);
         if (instr->HasObservableSideEffects()) {
-          AddSimulate(expr->AssignmentId());
+          AddSimulate(expr->AssignmentId(), REMOVABLE_SIMULATE);
         }
         break;
       }
@@ -8167,7 +8186,9 @@ void HGraphBuilder::VisitCountOperation(CountOperation* expr) {
         load = BuildLoadNamedGeneric(object, name, prop);
       }
       PushAndAdd(load);
-      if (load->HasObservableSideEffects()) AddSimulate(prop->LoadId());
+      if (load->HasObservableSideEffects()) {
+        AddSimulate(prop->LoadId(), REMOVABLE_SIMULATE);
+      }
 
       after = BuildIncrement(returns_original_input, expr);
       input = Pop();
@@ -8195,7 +8216,9 @@ void HGraphBuilder::VisitCountOperation(CountOperation* expr) {
       // necessary.
       environment()->SetExpressionStackAt(0, after);
       if (returns_original_input) environment()->SetExpressionStackAt(1, input);
-      if (store->HasObservableSideEffects()) AddSimulate(expr->AssignmentId());
+      if (store->HasObservableSideEffects()) {
+        AddSimulate(expr->AssignmentId(), REMOVABLE_SIMULATE);
+      }
 
     } else {
       // Keyed property.
@@ -8212,7 +8235,7 @@ void HGraphBuilder::VisitCountOperation(CountOperation* expr) {
           false,  // is_store
           &has_side_effects);
       Push(load);
-      if (has_side_effects) AddSimulate(prop->LoadId());
+      if (has_side_effects) AddSimulate(prop->LoadId(), REMOVABLE_SIMULATE);
 
       after = BuildIncrement(returns_original_input, expr);
       input = Pop();
@@ -8230,7 +8253,7 @@ void HGraphBuilder::VisitCountOperation(CountOperation* expr) {
       environment()->SetExpressionStackAt(0, after);
       if (returns_original_input) environment()->SetExpressionStackAt(1, input);
       ASSERT(has_side_effects);  // Stores always have side effects.
-      AddSimulate(expr->AssignmentId());
+      AddSimulate(expr->AssignmentId(), REMOVABLE_SIMULATE);
     }
   }
 
@@ -8251,21 +8274,82 @@ HStringCharCodeAt* HGraphBuilder::BuildStringCharCodeAt(HValue* context,
   return new(zone()) HStringCharCodeAt(context, string, checked_index);
 }
 
+// Checks if the given shift amounts have form: (sa) and (32 - sa).
+static bool ShiftAmountsAllowReplaceByRotate(HValue* sa,
+                                             HValue* const32_minus_sa) {
+  if (!const32_minus_sa->IsSub()) return false;
+  HSub* sub = HSub::cast(const32_minus_sa);
+  HValue* const32 = sub->left();
+  if (!const32->IsConstant() ||
+      HConstant::cast(const32)->Integer32Value() != 32) {
+    return false;
+  }
+  return (sub->right() == sa);
+}
+
+
+// Checks if the left and the right are shift instructions with the oposite
+// directions that can be replaced by one rotate right instruction or not.
+// Returns the operand and the shift amount for the rotate instruction in the
+// former case.
+bool HGraphBuilder::MatchRotateRight(HValue* left,
+                                     HValue* right,
+                                     HValue** operand,
+                                     HValue** shift_amount) {
+  HShl* shl;
+  HShr* shr;
+  if (left->IsShl() && right->IsShr()) {
+    shl = HShl::cast(left);
+    shr = HShr::cast(right);
+  } else if (left->IsShr() && right->IsShl()) {
+    shl = HShl::cast(right);
+    shr = HShr::cast(left);
+  } else {
+    return false;
+  }
+
+  if (!ShiftAmountsAllowReplaceByRotate(shl->right(), shr->right()) &&
+      !ShiftAmountsAllowReplaceByRotate(shr->right(), shl->right())) {
+    return false;
+  }
+  *operand= shr->left();
+  *shift_amount = shr->right();
+  return true;
+}
+
+
+bool CanBeZero(HValue *right) {
+  if (right->IsConstant()) {
+    HConstant* right_const = HConstant::cast(right);
+    if (right_const->HasInteger32Value() &&
+       (right_const->Integer32Value() & 0x1f) != 0) {
+      return false;
+    }
+  }
+  return true;
+}
+
 
 HInstruction* HGraphBuilder::BuildBinaryOperation(BinaryOperation* expr,
                                                   HValue* left,
                                                   HValue* right) {
   HValue* context = environment()->LookupContext();
-  TypeInfo info = oracle()->BinaryType(expr);
-  if (info.IsUninitialized()) {
+  TypeInfo left_info, right_info, result_info, combined_info;
+  oracle()->BinaryType(expr, &left_info, &right_info, &result_info);
+  Representation left_rep = ToRepresentation(left_info);
+  Representation right_rep = ToRepresentation(right_info);
+  Representation result_rep = ToRepresentation(result_info);
+  if (left_info.IsUninitialized()) {
+    // Can't have initialized one but not the other.
+    ASSERT(right_info.IsUninitialized());
     AddInstruction(new(zone()) HSoftDeoptimize);
     current_block()->MarkAsDeoptimizing();
-    info = TypeInfo::Unknown();
+    left_info = right_info = TypeInfo::Unknown();
   }
   HInstruction* instr = NULL;
   switch (expr->op()) {
     case Token::ADD:
-      if (info.IsString()) {
+      if (left_info.IsString() && right_info.IsString()) {
         AddInstruction(new(zone()) HCheckNonSmi(left));
         AddInstruction(HCheckInstanceType::NewIsString(left, zone()));
         AddInstruction(new(zone()) HCheckNonSmi(right));
@@ -8289,25 +8373,26 @@ HInstruction* HGraphBuilder::BuildBinaryOperation(BinaryOperation* expr,
       break;
     case Token::BIT_XOR:
     case Token::BIT_AND:
-    case Token::BIT_OR:
       instr = HBitwise::NewHBitwise(zone(), expr->op(), context, left, right);
       break;
+    case Token::BIT_OR: {
+      HValue* operand, *shift_amount;
+      if (left_info.IsInteger32() && right_info.IsInteger32() &&
+          MatchRotateRight(left, right, &operand, &shift_amount)) {
+        instr = new(zone()) HRor(context, operand, shift_amount);
+      } else {
+        instr = HBitwise::NewHBitwise(zone(), expr->op(), context, left, right);
+      }
+      break;
+    }
     case Token::SAR:
       instr = HSar::NewHSar(zone(), context, left, right);
       break;
     case Token::SHR:
       instr = HShr::NewHShr(zone(), context, left, right);
-      if (FLAG_opt_safe_uint32_operations && instr->IsShr()) {
-        bool can_be_shift_by_zero = true;
-        if (right->IsConstant()) {
-          HConstant* right_const = HConstant::cast(right);
-          if (right_const->HasInteger32Value() &&
-              (right_const->Integer32Value() & 0x1f) != 0) {
-            can_be_shift_by_zero = false;
-          }
-        }
-
-        if (can_be_shift_by_zero) graph()->RecordUint32Instruction(instr);
+      if (FLAG_opt_safe_uint32_operations && instr->IsShr() &&
+          CanBeZero(right)) {
+        graph()->RecordUint32Instruction(instr);
       }
       break;
     case Token::SHL:
@@ -8317,23 +8402,11 @@ HInstruction* HGraphBuilder::BuildBinaryOperation(BinaryOperation* expr,
       UNREACHABLE();
   }
 
-  // If we hit an uninitialized binary op stub we will get type info
-  // for a smi operation. If one of the operands is a constant string
-  // do not generate code assuming it is a smi operation.
-  if (info.IsSmi() &&
-      ((left->IsConstant() && HConstant::cast(left)->handle()->IsString()) ||
-       (right->IsConstant() && HConstant::cast(right)->handle()->IsString()))) {
-    return instr;
-  }
-  Representation rep = ToRepresentation(info);
-  // We only generate either int32 or generic tagged bitwise operations.
-  if (instr->IsBitwiseBinaryOperation()) {
-    HBitwiseBinaryOperation::cast(instr)->
-         InitializeObservedInputRepresentation(rep);
-    if (rep.IsDouble()) rep = Representation::Integer32();
+  if (instr->IsBinaryOperation()) {
+    HBinaryOperation* binop = HBinaryOperation::cast(instr);
+    binop->set_observed_input_representation(left_rep, right_rep);
+    binop->initialize_output_representation(result_rep);
   }
-  TraceRepresentation(expr->op(), info, instr, rep);
-  instr->AssumeRepresentation(rep);
   return instr;
 }
 
@@ -8477,27 +8550,8 @@ void HGraphBuilder::VisitArithmeticExpression(BinaryOperation* expr) {
 }
 
 
-void HGraphBuilder::TraceRepresentation(Token::Value op,
-                                        TypeInfo info,
-                                        HValue* value,
-                                        Representation rep) {
-  if (!FLAG_trace_representation) return;
-  // TODO(svenpanne) Under which circumstances are we actually not flexible?
-  // At first glance, this looks a bit weird...
-  bool flexible = value->CheckFlag(HValue::kFlexibleRepresentation);
-  PrintF("Operation %s has type info %s, %schange representation assumption "
-         "for %s (ID %d) from %s to %s\n",
-         Token::Name(op),
-         info.ToString(),
-         flexible ? "" : " DO NOT ",
-         value->Mnemonic(),
-         graph_->GetMaximumValueID(),
-         value->representation().Mnemonic(),
-         rep.Mnemonic());
-}
-
-
 Representation HGraphBuilder::ToRepresentation(TypeInfo info) {
+  if (info.IsUninitialized()) return Representation::None();
   if (info.IsSmi()) return Representation::Integer32();
   if (info.IsInteger32()) return Representation::Integer32();
   if (info.IsDouble()) return Representation::Double();
@@ -8595,13 +8649,17 @@ void HGraphBuilder::VisitCompareOperation(CompareOperation* expr) {
     return ast_context()->ReturnControl(instr, expr->id());
   }
 
-  TypeInfo type_info = oracle()->CompareType(expr);
+  TypeInfo left_type, right_type, overall_type_info;
+  oracle()->CompareType(expr, &left_type, &right_type, &overall_type_info);
+  Representation combined_rep = ToRepresentation(overall_type_info);
+  Representation left_rep = ToRepresentation(left_type);
+  Representation right_rep = ToRepresentation(right_type);
   // Check if this expression was ever executed according to type feedback.
   // Note that for the special typeof/null/undefined cases we get unknown here.
-  if (type_info.IsUninitialized()) {
+  if (overall_type_info.IsUninitialized()) {
     AddInstruction(new(zone()) HSoftDeoptimize);
     current_block()->MarkAsDeoptimizing();
-    type_info = TypeInfo::Unknown();
+    overall_type_info = left_type = right_type = TypeInfo::Unknown();
   }
 
   CHECK_ALIVE(VisitForValue(expr->left()));
@@ -8673,17 +8731,15 @@ void HGraphBuilder::VisitCompareOperation(CompareOperation* expr) {
     HIn* result = new(zone()) HIn(context, left, right);
     result->set_position(expr->position());
     return ast_context()->ReturnInstruction(result, expr->id());
-  } else if (type_info.IsNonPrimitive()) {
+  } else if (overall_type_info.IsNonPrimitive()) {
     switch (op) {
       case Token::EQ:
       case Token::EQ_STRICT: {
         // Can we get away with map check and not instance type check?
         Handle<Map> map = oracle()->GetCompareMap(expr);
         if (!map.is_null()) {
-          AddInstruction(new(zone()) HCheckNonSmi(left));
-          AddInstruction(HCheckMaps::NewWithTransitions(left, map, zone()));
-          AddInstruction(new(zone()) HCheckNonSmi(right));
-          AddInstruction(HCheckMaps::NewWithTransitions(right, map, zone()));
+          AddCheckMapsWithTransitions(left, map);
+          AddCheckMapsWithTransitions(right, map);
           HCompareObjectEqAndBranch* result =
               new(zone()) HCompareObjectEqAndBranch(left, right);
           result->set_position(expr->position());
@@ -8702,8 +8758,7 @@ void HGraphBuilder::VisitCompareOperation(CompareOperation* expr) {
       default:
         return Bailout("Unsupported non-primitive compare");
     }
-  } else if (type_info.IsString() && oracle()->IsSymbolCompare(expr) &&
-             (op == Token::EQ || op == Token::EQ_STRICT)) {
+  } else if (overall_type_info.IsSymbol() && Token::IsEqualityOp(op)) {
     AddInstruction(new(zone()) HCheckNonSmi(left));
     AddInstruction(HCheckInstanceType::NewIsSymbol(left, zone()));
     AddInstruction(new(zone()) HCheckNonSmi(right));
@@ -8713,17 +8768,17 @@ void HGraphBuilder::VisitCompareOperation(CompareOperation* expr) {
     result->set_position(expr->position());
     return ast_context()->ReturnControl(result, expr->id());
   } else {
-    Representation r = ToRepresentation(type_info);
-    if (r.IsTagged()) {
+    if (combined_rep.IsTagged() || combined_rep.IsNone()) {
       HCompareGeneric* result =
           new(zone()) HCompareGeneric(context, left, right, op);
+      result->set_observed_input_representation(left_rep, right_rep);
       result->set_position(expr->position());
       return ast_context()->ReturnInstruction(result, expr->id());
     } else {
       HCompareIDAndBranch* result =
           new(zone()) HCompareIDAndBranch(left, right, op);
+      result->set_observed_input_representation(left_rep, right_rep);
       result->set_position(expr->position());
-      result->SetInputRepresentation(r);
       return ast_context()->ReturnControl(result, expr->id());
     }
   }
@@ -8810,7 +8865,9 @@ void HGraphBuilder::VisitVariableDeclaration(VariableDeclaration* declaration) {
         HStoreContextSlot* store = new(zone()) HStoreContextSlot(
             context, variable->index(), HStoreContextSlot::kNoCheck, value);
         AddInstruction(store);
-        if (store->HasObservableSideEffects()) AddSimulate(proxy->id());
+        if (store->HasObservableSideEffects()) {
+          AddSimulate(proxy->id(), REMOVABLE_SIMULATE);
+        }
       }
       break;
     case Variable::LOOKUP:
@@ -8846,7 +8903,9 @@ void HGraphBuilder::VisitFunctionDeclaration(FunctionDeclaration* declaration) {
       HStoreContextSlot* store = new(zone()) HStoreContextSlot(
           context, variable->index(), HStoreContextSlot::kNoCheck, value);
       AddInstruction(store);
-      if (store->HasObservableSideEffects()) AddSimulate(proxy->id());
+      if (store->HasObservableSideEffects()) {
+        AddSimulate(proxy->id(), REMOVABLE_SIMULATE);
+      }
       break;
     }
     case Variable::LOOKUP:
@@ -8890,6 +8949,11 @@ void HGraphBuilder::VisitModuleUrl(ModuleUrl* module) {
 }
 
 
+void HGraphBuilder::VisitModuleStatement(ModuleStatement* stmt) {
+  UNREACHABLE();
+}
+
+
 // Generators for inline runtime functions.
 // Support for types.
 void HGraphBuilder::GenerateIsSmi(CallRuntime* call) {
@@ -9025,8 +9089,10 @@ void HGraphBuilder::GenerateArguments(CallRuntime* call) {
   HInstruction* elements = AddInstruction(
       new(zone()) HArgumentsElements(false));
   HInstruction* length = AddInstruction(new(zone()) HArgumentsLength(elements));
+  HInstruction* checked_index =
+      AddInstruction(new(zone()) HBoundsCheck(index, length));
   HAccessArgumentsAt* result =
-      new(zone()) HAccessArgumentsAt(elements, length, index);
+      new(zone()) HAccessArgumentsAt(elements, length, checked_index);
   return ast_context()->ReturnInstruction(result, call->id());
 }
 
@@ -9059,6 +9125,39 @@ void HGraphBuilder::GenerateDateField(CallRuntime* call) {
 }
 
 
+void HGraphBuilder::GenerateOneByteSeqStringSetChar(
+    CallRuntime* call) {
+  ASSERT(call->arguments()->length() == 3);
+  CHECK_ALIVE(VisitForValue(call->arguments()->at(0)));
+  CHECK_ALIVE(VisitForValue(call->arguments()->at(1)));
+  CHECK_ALIVE(VisitForValue(call->arguments()->at(2)));
+  HValue* value = Pop();
+  HValue* index = Pop();
+  HValue* string = Pop();
+  HSeqStringSetChar* result = new(zone()) HSeqStringSetChar(
+      String::ONE_BYTE_ENCODING, string, index, value);
+  return ast_context()->ReturnInstruction(result, call->id());
+}
+
+
+void HGraphBuilder::GenerateTwoByteSeqStringSetChar(
+    CallRuntime* call) {
+  ASSERT(call->arguments()->length() == 3);
+  CHECK_ALIVE(VisitForValue(call->arguments()->at(0)));
+  CHECK_ALIVE(VisitForValue(call->arguments()->at(1)));
+  CHECK_ALIVE(VisitForValue(call->arguments()->at(2)));
+  HValue* value = Pop();
+  HValue* index = Pop();
+  HValue* string = Pop();
+  HValue* context = environment()->LookupContext();
+  HStringCharCodeAt* char_code = BuildStringCharCodeAt(context, string, index);
+  AddInstruction(char_code);
+  HSeqStringSetChar* result = new(zone()) HSeqStringSetChar(
+      String::TWO_BYTE_ENCODING, string, index, value);
+  return ast_context()->ReturnInstruction(result, call->id());
+}
+
+
 void HGraphBuilder::GenerateSetValueOf(CallRuntime* call) {
   ASSERT(call->arguments()->length() == 2);
   CHECK_ALIVE(VisitForValue(call->arguments()->at(0)));
@@ -9391,6 +9490,7 @@ HEnvironment::HEnvironment(HEnvironment* outer,
       specials_count_(1),
       local_count_(0),
       outer_(outer),
+      entry_(NULL),
       pop_count_(0),
       push_count_(0),
       ast_id_(BailoutId::None()),
@@ -9407,6 +9507,7 @@ HEnvironment::HEnvironment(const HEnvironment* other, Zone* zone)
       specials_count_(1),
       local_count_(0),
       outer_(NULL),
+      entry_(NULL),
       pop_count_(0),
       push_count_(0),
       ast_id_(other->ast_id()),
@@ -9427,6 +9528,7 @@ HEnvironment::HEnvironment(HEnvironment* outer,
       parameter_count_(arguments),
       local_count_(0),
       outer_(outer),
+      entry_(NULL),
       pop_count_(0),
       push_count_(0),
       ast_id_(BailoutId::None()),
@@ -9455,6 +9557,7 @@ void HEnvironment::Initialize(const HEnvironment* other) {
   parameter_count_ = other->parameter_count_;
   local_count_ = other->local_count_;
   if (other->outer_ != NULL) outer_ = other->outer_->Copy();  // Deep copy.
+  entry_ = other->entry_;
   pop_count_ = other->pop_count_;
   push_count_ = other->push_count_;
   ast_id_ = other->ast_id_;
@@ -9900,28 +10003,43 @@ void HStatistics::Print() {
     double size_percent = static_cast<double>(size) * 100 / total_size_;
     PrintF(" %8u bytes / %4.1f %%\n", size, size_percent);
   }
+
+  PrintF("---------------------------------------------------------------\n");
+  int64_t total = create_graph_ + optimize_graph_ + generate_code_;
+  PrintF("%30s - %7.3f ms / %4.1f %% \n",
+         "Create graph",
+         static_cast<double>(create_graph_) / 1000,
+         static_cast<double>(create_graph_) * 100 / total);
+  PrintF("%30s - %7.3f ms / %4.1f %% \n",
+         "Optimize graph",
+         static_cast<double>(optimize_graph_) / 1000,
+         static_cast<double>(optimize_graph_) * 100 / total);
+  PrintF("%30s - %7.3f ms / %4.1f %% \n",
+         "Generate and install code",
+         static_cast<double>(generate_code_) / 1000,
+         static_cast<double>(generate_code_) * 100 / total);
+  PrintF("---------------------------------------------------------------\n");
+  PrintF("%30s - %7.3f ms (%.1f times slower than full code gen)\n",
+         "Total",
+         static_cast<double>(total) / 1000,
+         static_cast<double>(total) / full_code_gen_);
+
   double source_size_in_kb = static_cast<double>(source_size_) / 1024;
   double normalized_time =  source_size_in_kb > 0
-      ? (static_cast<double>(sum) / 1000) / source_size_in_kb
+      ? (static_cast<double>(total) / 1000) / source_size_in_kb
       : 0;
-  double normalized_bytes = source_size_in_kb > 0
-      ? total_size_ / source_size_in_kb
+  double normalized_size_in_kb = source_size_in_kb > 0
+      ? total_size_ / 1024 / source_size_in_kb
       : 0;
-  PrintF("%30s - %7.3f ms           %7.3f bytes\n", "Sum",
-         normalized_time, normalized_bytes);
-  PrintF("---------------------------------------------------------------\n");
-  PrintF("%30s - %7.3f ms (%.1f times slower than full code gen)\n",
-         "Total",
-         static_cast<double>(total_) / 1000,
-         static_cast<double>(total_) / full_code_gen_);
+  PrintF("%30s - %7.3f ms           %7.3f kB allocated\n",
+         "Average per kB source",
+         normalized_time, normalized_size_in_kb);
 }
 
 
 void HStatistics::SaveTiming(const char* name, int64_t ticks, unsigned size) {
   if (name == HPhase::kFullCodeGen) {
     full_code_gen_ += ticks;
-  } else if (name == HPhase::kTotal) {
-    total_ += ticks;
   } else {
     total_size_ += size;
     for (int i = 0; i < names_.length(); ++i) {
@@ -9939,8 +10057,6 @@ void HStatistics::SaveTiming(const char* name, int64_t ticks, unsigned size) {
 
 
 const char* const HPhase::kFullCodeGen = "Full code generator";
-const char* const HPhase::kTotal = "Total";
-
 
 void HPhase::Begin(const char* name,
                    HGraph* graph,
diff --git a/deps/v8/src/hydrogen.h b/deps/v8/src/hydrogen.h
index 7d23ac7306..98b05d147a 100644
--- a/deps/v8/src/hydrogen.h
+++ b/deps/v8/src/hydrogen.h
@@ -125,7 +125,10 @@ class HBasicBlock: public ZoneObject {
   void Goto(HBasicBlock* block, FunctionState* state = NULL);
 
   int PredecessorIndexOf(HBasicBlock* predecessor) const;
-  void AddSimulate(BailoutId ast_id) { AddInstruction(CreateSimulate(ast_id)); }
+  void AddSimulate(BailoutId ast_id,
+                   RemovableSimulate removable = FIXED_SIMULATE) {
+    AddInstruction(CreateSimulate(ast_id, removable));
+  }
   void AssignCommonDominator(HBasicBlock* other);
   void AssignLoopSuccessorDominators();
 
@@ -166,7 +169,7 @@ class HBasicBlock: public ZoneObject {
   void RegisterPredecessor(HBasicBlock* pred);
   void AddDominatedBlock(HBasicBlock* block);
 
-  HSimulate* CreateSimulate(BailoutId ast_id);
+  HSimulate* CreateSimulate(BailoutId ast_id, RemovableSimulate removable);
   HDeoptimize* CreateDeoptimize(HDeoptimize::UseEnvironment has_uses);
 
   int block_id_;
@@ -255,6 +258,7 @@ class HGraph: public ZoneObject {
 
   void InitializeInferredTypes();
   void InsertTypeConversions();
+  void MergeRemovableSimulates();
   void InsertRepresentationChanges();
   void MarkDeoptimizeOnUndefined();
   void ComputeMinusZeroChecks();
@@ -268,7 +272,9 @@ class HGraph: public ZoneObject {
   void ReplaceCheckedValues();
   void EliminateRedundantBoundsChecks();
   void DehoistSimpleArrayIndexComputations();
+  void DeadCodeElimination();
   void PropagateDeoptimizingMark();
+  void EliminateUnusedInstructions();
 
   // Returns false if there are phi-uses of the arguments-object
   // which are not supported by the optimizing compiler.
@@ -434,13 +440,6 @@ class HEnvironment: public ZoneObject {
                Handle<JSFunction> closure,
                Zone* zone);
 
-  HEnvironment* DiscardInlined(bool drop_extra) {
-    HEnvironment* outer = outer_;
-    while (outer->frame_type() != JS_FUNCTION) outer = outer->outer_;
-    if (drop_extra) outer->Drop(1);
-    return outer;
-  }
-
   HEnvironment* arguments_environment() {
     return outer()->frame_type() == ARGUMENTS_ADAPTOR ? outer() : this;
   }
@@ -462,6 +461,9 @@ class HEnvironment: public ZoneObject {
   BailoutId ast_id() const { return ast_id_; }
   void set_ast_id(BailoutId id) { ast_id_ = id; }
 
+  HEnterInlined* entry() const { return entry_; }
+  void set_entry(HEnterInlined* entry) { entry_ = entry; }
+
   int length() const { return values_.length(); }
   bool is_special_index(int i) const {
     return i >= parameter_count() && i < parameter_count() + specials_count();
@@ -540,6 +542,13 @@ class HEnvironment: public ZoneObject {
                                 CallKind call_kind,
                                 InliningKind inlining_kind) const;
 
+  HEnvironment* DiscardInlined(bool drop_extra) {
+    HEnvironment* outer = outer_;
+    while (outer->frame_type() != JS_FUNCTION) outer = outer->outer_;
+    if (drop_extra) outer->Drop(1);
+    return outer;
+  }
+
   void AddIncomingEdge(HBasicBlock* block, HEnvironment* other);
 
   void ClearHistory() {
@@ -600,6 +609,7 @@ class HEnvironment: public ZoneObject {
   int specials_count_;
   int local_count_;
   HEnvironment* outer_;
+  HEnterInlined* entry_;
   int pop_count_;
   int push_count_;
   BailoutId ast_id_;
@@ -607,6 +617,25 @@ class HEnvironment: public ZoneObject {
 };
 
 
+class HInferRepresentation BASE_EMBEDDED {
+ public:
+  explicit HInferRepresentation(HGraph* graph)
+      : graph_(graph),
+        worklist_(8, graph->zone()),
+        in_worklist_(graph->GetMaximumValueID(), graph->zone()) { }
+
+  void Analyze();
+  void AddToWorklist(HValue* current);
+
+ private:
+  Zone* zone() const { return graph_->zone(); }
+
+  HGraph* graph_;
+  ZoneList<HValue*> worklist_;
+  BitVector in_worklist_;
+};
+
+
 class HGraphBuilder;
 
 enum ArgumentsAllowedFlag {
@@ -874,7 +903,8 @@ class HGraphBuilder: public AstVisitor {
 
   // Adding instructions.
   HInstruction* AddInstruction(HInstruction* instr);
-  void AddSimulate(BailoutId ast_id);
+  void AddSimulate(BailoutId ast_id,
+                   RemovableSimulate removable = FIXED_SIMULATE);
 
   // Bailout environment manipulation.
   void Push(HValue* value) { environment()->Push(value); }
@@ -1019,10 +1049,6 @@ class HGraphBuilder: public AstVisitor {
   // to push them as outgoing parameters.
   template <class Instruction> HInstruction* PreProcessCall(Instruction* call);
 
-  void TraceRepresentation(Token::Value op,
-                           TypeInfo info,
-                           HValue* value,
-                           Representation rep);
   static Representation ToRepresentation(TypeInfo info);
 
   void SetUpScope(Scope* scope);
@@ -1159,8 +1185,7 @@ class HGraphBuilder: public AstVisitor {
 
   HLoadNamedField* BuildLoadNamedField(HValue* object,
                                        Handle<Map> map,
-                                       LookupResult* result,
-                                       bool smi_and_map_check);
+                                       LookupResult* result);
   HInstruction* BuildLoadNamedGeneric(HValue* object,
                                       Handle<String> name,
                                       Property* expr);
@@ -1181,12 +1206,14 @@ class HGraphBuilder: public AstVisitor {
       ElementsKind elements_kind,
       bool is_store);
 
+  void AddCheckMapsWithTransitions(HValue* object,
+                                   Handle<Map> map);
+
   HInstruction* BuildStoreNamedField(HValue* object,
                                      Handle<String> name,
                                      HValue* value,
                                      Handle<Map> map,
-                                     LookupResult* lookup,
-                                     bool smi_and_map_check);
+                                     LookupResult* lookup);
   HInstruction* BuildStoreNamedGeneric(HValue* object,
                                        Handle<String> name,
                                        HValue* value);
@@ -1207,10 +1234,17 @@ class HGraphBuilder: public AstVisitor {
 
   HInstruction* BuildThisFunction();
 
+  void AddCheckPrototypeMaps(Handle<JSObject> holder,
+                             Handle<Map> receiver_map);
+
   void AddCheckConstantFunction(Handle<JSObject> holder,
                                 HValue* receiver,
-                                Handle<Map> receiver_map,
-                                bool smi_and_map_check);
+                                Handle<Map> receiver_map);
+
+  bool MatchRotateRight(HValue* left,
+                        HValue* right,
+                        HValue** operand,
+                        HValue** shift_amount);
 
   Zone* zone() const { return zone_; }
 
@@ -1344,12 +1378,22 @@ class HStatistics: public Malloced {
     return instance.get();
   }
 
+  void IncrementSubtotals(int64_t create_graph,
+                          int64_t optimize_graph,
+                          int64_t generate_code) {
+    create_graph_ += create_graph;
+    optimize_graph_ += optimize_graph;
+    generate_code_ += generate_code;
+  }
+
  private:
   HStatistics()
       : timing_(5),
         names_(5),
         sizes_(5),
-        total_(0),
+        create_graph_(0),
+        optimize_graph_(0),
+        generate_code_(0),
         total_size_(0),
         full_code_gen_(0),
         source_size_(0) { }
@@ -1357,7 +1401,9 @@ class HStatistics: public Malloced {
   List<int64_t> timing_;
   List<const char*> names_;
   List<unsigned> sizes_;
-  int64_t total_;
+  int64_t create_graph_;
+  int64_t optimize_graph_;
+  int64_t generate_code_;
   unsigned total_size_;
   int64_t full_code_gen_;
   double source_size_;
@@ -1367,7 +1413,6 @@ class HStatistics: public Malloced {
 class HPhase BASE_EMBEDDED {
  public:
   static const char* const kFullCodeGen;
-  static const char* const kTotal;
 
   explicit HPhase(const char* name) { Begin(name, NULL, NULL, NULL); }
   HPhase(const char* name, HGraph* graph) {
diff --git a/deps/v8/src/ia32/assembler-ia32-inl.h b/deps/v8/src/ia32/assembler-ia32-inl.h
index 0b47748d6b..114f878421 100644
--- a/deps/v8/src/ia32/assembler-ia32-inl.h
+++ b/deps/v8/src/ia32/assembler-ia32-inl.h
@@ -46,12 +46,21 @@ namespace v8 {
 namespace internal {
 
 
+static const byte kCallOpcode = 0xE8;
+
+
 // The modes possibly affected by apply must be in kApplyMask.
 void RelocInfo::apply(intptr_t delta) {
   if (rmode_ == RUNTIME_ENTRY || IsCodeTarget(rmode_)) {
     int32_t* p = reinterpret_cast<int32_t*>(pc_);
     *p -= delta;  // Relocate entry.
     CPU::FlushICache(p, sizeof(uint32_t));
+  } else if (rmode_ == CODE_AGE_SEQUENCE) {
+    if (*pc_ == kCallOpcode) {
+      int32_t* p = reinterpret_cast<int32_t*>(pc_ + 1);
+      *p -= delta;  // Relocate entry.
+      CPU::FlushICache(p, sizeof(uint32_t));
+    }
   } else if (rmode_ == JS_RETURN && IsPatchedReturnSequence()) {
     // Special handling of js_return when a break point is set (call
     // instruction has been inserted).
@@ -169,6 +178,21 @@ void RelocInfo::set_target_cell(JSGlobalPropertyCell* cell,
 }
 
 
+Code* RelocInfo::code_age_stub() {
+  ASSERT(rmode_ == RelocInfo::CODE_AGE_SEQUENCE);
+  ASSERT(*pc_ == kCallOpcode);
+  return Code::GetCodeFromTargetAddress(
+      Assembler::target_address_at(pc_ + 1));
+}
+
+
+void RelocInfo::set_code_age_stub(Code* stub) {
+  ASSERT(*pc_ == kCallOpcode);
+  ASSERT(rmode_ == RelocInfo::CODE_AGE_SEQUENCE);
+  Assembler::set_target_address_at(pc_ + 1, stub->instruction_start());
+}
+
+
 Address RelocInfo::call_address() {
   ASSERT((IsJSReturn(rmode()) && IsPatchedReturnSequence()) ||
          (IsDebugBreakSlot(rmode()) && IsPatchedDebugBreakSlotSequence()));
@@ -206,7 +230,7 @@ Object** RelocInfo::call_object_address() {
 
 
 bool RelocInfo::IsPatchedReturnSequence() {
-  return *pc_ == 0xE8;
+  return *pc_ == kCallOpcode;
 }
 
 
@@ -227,7 +251,9 @@ void RelocInfo::Visit(ObjectVisitor* visitor) {
   } else if (mode == RelocInfo::EXTERNAL_REFERENCE) {
     visitor->VisitExternalReference(this);
     CPU::FlushICache(pc_, sizeof(Address));
-#ifdef ENABLE_DEBUGGER_SUPPORT
+  } else if (RelocInfo::IsCodeAgeSequence(mode)) {
+    visitor->VisitCodeAgeSequence(this);
+  #ifdef ENABLE_DEBUGGER_SUPPORT
   // TODO(isolates): Get a cached isolate below.
   } else if (((RelocInfo::IsJSReturn(mode) &&
               IsPatchedReturnSequence()) ||
@@ -255,6 +281,8 @@ void RelocInfo::Visit(Heap* heap) {
   } else if (mode == RelocInfo::EXTERNAL_REFERENCE) {
     StaticVisitor::VisitExternalReference(this);
     CPU::FlushICache(pc_, sizeof(Address));
+  } else if (RelocInfo::IsCodeAgeSequence(mode)) {
+    StaticVisitor::VisitCodeAgeSequence(heap, this);
 #ifdef ENABLE_DEBUGGER_SUPPORT
   } else if (heap->isolate()->debug()->has_break_points() &&
              ((RelocInfo::IsJSReturn(mode) &&
@@ -387,6 +415,11 @@ void Assembler::set_target_address_at(Address pc, Address target) {
 }
 
 
+Address Assembler::target_address_from_return_address(Address pc) {
+  return pc - kCallTargetAddressOffset;
+}
+
+
 Displacement Assembler::disp_at(Label* L) {
   return Displacement(long_at(L->pos()));
 }
diff --git a/deps/v8/src/ia32/assembler-ia32.cc b/deps/v8/src/ia32/assembler-ia32.cc
index ea68c5090f..8cccaa5a74 100644
--- a/deps/v8/src/ia32/assembler-ia32.cc
+++ b/deps/v8/src/ia32/assembler-ia32.cc
@@ -169,7 +169,7 @@ void Displacement::init(Label* L, Type type) {
 const int RelocInfo::kApplyMask =
   RelocInfo::kCodeTargetMask | 1 << RelocInfo::RUNTIME_ENTRY |
     1 << RelocInfo::JS_RETURN | 1 << RelocInfo::INTERNAL_REFERENCE |
-    1 << RelocInfo::DEBUG_BREAK_SLOT;
+    1 << RelocInfo::DEBUG_BREAK_SLOT | 1 << RelocInfo::CODE_AGE_SEQUENCE;
 
 
 bool RelocInfo::IsCodedSpecially() {
@@ -312,48 +312,19 @@ Register Operand::reg() const {
 static void InitCoverageLog();
 #endif
 
-Assembler::Assembler(Isolate* arg_isolate, void* buffer, int buffer_size)
-    : AssemblerBase(arg_isolate),
-      positions_recorder_(this),
-      emit_debug_code_(FLAG_debug_code) {
-  if (buffer == NULL) {
-    // Do our own buffer management.
-    if (buffer_size <= kMinimalBufferSize) {
-      buffer_size = kMinimalBufferSize;
-
-      if (isolate()->assembler_spare_buffer() != NULL) {
-        buffer = isolate()->assembler_spare_buffer();
-        isolate()->set_assembler_spare_buffer(NULL);
-      }
-    }
-    if (buffer == NULL) {
-      buffer_ = NewArray<byte>(buffer_size);
-    } else {
-      buffer_ = static_cast<byte*>(buffer);
-    }
-    buffer_size_ = buffer_size;
-    own_buffer_ = true;
-  } else {
-    // Use externally provided buffer instead.
-    ASSERT(buffer_size > 0);
-    buffer_ = static_cast<byte*>(buffer);
-    buffer_size_ = buffer_size;
-    own_buffer_ = false;
-  }
-
+Assembler::Assembler(Isolate* isolate, void* buffer, int buffer_size)
+    : AssemblerBase(isolate, buffer, buffer_size),
+      positions_recorder_(this) {
   // Clear the buffer in debug mode unless it was provided by the
   // caller in which case we can't be sure it's okay to overwrite
   // existing code in it; see CodePatcher::CodePatcher(...).
 #ifdef DEBUG
   if (own_buffer_) {
-    memset(buffer_, 0xCC, buffer_size);  // int3
+    memset(buffer_, 0xCC, buffer_size_);  // int3
   }
 #endif
 
-  // Set up buffer pointers.
-  ASSERT(buffer_ != NULL);
-  pc_ = buffer_;
-  reloc_info_writer.Reposition(buffer_ + buffer_size, pc_);
+  reloc_info_writer.Reposition(buffer_ + buffer_size_, pc_);
 
 #ifdef GENERATED_CODE_COVERAGE
   InitCoverageLog();
@@ -361,18 +332,6 @@ Assembler::Assembler(Isolate* arg_isolate, void* buffer, int buffer_size)
 }
 
 
-Assembler::~Assembler() {
-  if (own_buffer_) {
-    if (isolate()->assembler_spare_buffer() == NULL &&
-        buffer_size_ == kMinimalBufferSize) {
-      isolate()->set_assembler_spare_buffer(buffer_);
-    } else {
-      DeleteArray(buffer_);
-    }
-  }
-}
-
-
 void Assembler::GetCode(CodeDesc* desc) {
   // Finalize code (at this point overflow() may be true, but the gap ensures
   // that we are still not overlapping instructions and relocation info).
@@ -1064,6 +1023,25 @@ void Assembler::rcr(Register dst, uint8_t imm8) {
   }
 }
 
+void Assembler::ror(Register dst, uint8_t imm8) {
+  EnsureSpace ensure_space(this);
+  ASSERT(is_uint5(imm8));  // illegal shift count
+  if (imm8 == 1) {
+    EMIT(0xD1);
+    EMIT(0xC8 | dst.code());
+  } else {
+    EMIT(0xC1);
+    EMIT(0xC8 | dst.code());
+    EMIT(imm8);
+  }
+}
+
+void Assembler::ror_cl(Register dst) {
+  EnsureSpace ensure_space(this);
+  EMIT(0xD3);
+  EMIT(0xC8 | dst.code());
+}
+
 
 void Assembler::sar(Register dst, uint8_t imm8) {
   EnsureSpace ensure_space(this);
@@ -1501,7 +1479,7 @@ void Assembler::jmp(Handle<Code> code, RelocInfo::Mode rmode) {
 
 void Assembler::j(Condition cc, Label* L, Label::Distance distance) {
   EnsureSpace ensure_space(this);
-  ASSERT(0 <= cc && cc < 16);
+  ASSERT(0 <= cc && static_cast<int>(cc) < 16);
   if (L->is_bound()) {
     const int short_size = 2;
     const int long_size  = 6;
@@ -1533,7 +1511,7 @@ void Assembler::j(Condition cc, Label* L, Label::Distance distance) {
 
 void Assembler::j(Condition cc, byte* entry, RelocInfo::Mode rmode) {
   EnsureSpace ensure_space(this);
-  ASSERT((0 <= cc) && (cc < 16));
+  ASSERT((0 <= cc) && (static_cast<int>(cc) < 16));
   // 0000 1111 1000 tttn #32-bit disp.
   EMIT(0x0F);
   EMIT(0x80 | cc);
@@ -1988,6 +1966,16 @@ void Assembler::addsd(XMMRegister dst, XMMRegister src) {
 }
 
 
+void Assembler::addsd(XMMRegister dst, const Operand& src) {
+  ASSERT(CpuFeatures::IsEnabled(SSE2));
+  EnsureSpace ensure_space(this);
+  EMIT(0xF2);
+  EMIT(0x0F);
+  EMIT(0x58);
+  emit_sse_operand(dst, src);
+}
+
+
 void Assembler::mulsd(XMMRegister dst, XMMRegister src) {
   ASSERT(CpuFeatures::IsEnabled(SSE2));
   EnsureSpace ensure_space(this);
@@ -1998,6 +1986,16 @@ void Assembler::mulsd(XMMRegister dst, XMMRegister src) {
 }
 
 
+void Assembler::mulsd(XMMRegister dst, const Operand& src) {
+  ASSERT(CpuFeatures::IsEnabled(SSE2));
+  EnsureSpace ensure_space(this);
+  EMIT(0xF2);
+  EMIT(0x0F);
+  EMIT(0x59);
+  emit_sse_operand(dst, src);
+}
+
+
 void Assembler::subsd(XMMRegister dst, XMMRegister src) {
   ASSERT(CpuFeatures::IsEnabled(SSE2));
   EnsureSpace ensure_space(this);
@@ -2105,6 +2103,16 @@ void Assembler::movmskpd(Register dst, XMMRegister src) {
 }
 
 
+void Assembler::pcmpeqd(XMMRegister dst, XMMRegister src) {
+  ASSERT(CpuFeatures::IsEnabled(SSE2));
+  EnsureSpace ensure_space(this);
+  EMIT(0x66);
+  EMIT(0x0F);
+  EMIT(0x76);
+  emit_sse_operand(dst, src);
+}
+
+
 void Assembler::cmpltsd(XMMRegister dst, XMMRegister src) {
   ASSERT(CpuFeatures::IsEnabled(SSE2));
   EnsureSpace ensure_space(this);
@@ -2384,7 +2392,7 @@ void Assembler::psrlq(XMMRegister dst, XMMRegister src) {
 }
 
 
-void Assembler::pshufd(XMMRegister dst, XMMRegister src, int8_t shuffle) {
+void Assembler::pshufd(XMMRegister dst, XMMRegister src, uint8_t shuffle) {
   ASSERT(CpuFeatures::IsEnabled(SSE2));
   EnsureSpace ensure_space(this);
   EMIT(0x66);
diff --git a/deps/v8/src/ia32/assembler-ia32.h b/deps/v8/src/ia32/assembler-ia32.h
index f95e7b797c..b1f421ec86 100644
--- a/deps/v8/src/ia32/assembler-ia32.h
+++ b/deps/v8/src/ia32/assembler-ia32.h
@@ -582,15 +582,7 @@ class Assembler : public AssemblerBase {
   // upon destruction of the assembler.
   // TODO(vitalyr): the assembler does not need an isolate.
   Assembler(Isolate* isolate, void* buffer, int buffer_size);
-  ~Assembler();
-
-  // Overrides the default provided by FLAG_debug_code.
-  void set_emit_debug_code(bool value) { emit_debug_code_ = value; }
-
-  // Avoids using instructions that vary in size in unpredictable ways between
-  // the snapshot and the running VM.  This is needed by the full compiler so
-  // that it can recompile code with debug support and fix the PC.
-  void set_predictable_code_size(bool value) { predictable_code_size_ = value; }
+  virtual ~Assembler() { }
 
   // GetCode emits any pending (non-emitted) code and fills the descriptor
   // desc. GetCode() is idempotent; it returns the same result if no other
@@ -601,6 +593,10 @@ class Assembler : public AssemblerBase {
   inline static Address target_address_at(Address pc);
   inline static void set_target_address_at(Address pc, Address target);
 
+  // Return the code target address at a call site from the return address
+  // of that call in the instruction stream.
+  inline static Address target_address_from_return_address(Address pc);
+
   // This sets the branch destination (which is in the instruction on x86).
   // This is for calls and branches within generated code.
   inline static void deserialization_set_special_target_at(
@@ -629,6 +625,7 @@ class Assembler : public AssemblerBase {
   static const int kPatchDebugBreakSlotAddressOffset = 1;  // JMP imm32.
 
   static const int kCallInstructionLength = 5;
+  static const int kPatchDebugBreakSlotReturnOffset = kPointerSize;
   static const int kJSReturnSequenceLength = 6;
 
   // The debug break slot must be able to contain a call instruction.
@@ -812,6 +809,8 @@ class Assembler : public AssemblerBase {
 
   void rcl(Register dst, uint8_t imm8);
   void rcr(Register dst, uint8_t imm8);
+  void ror(Register dst, uint8_t imm8);
+  void ror_cl(Register dst);
 
   void sar(Register dst, uint8_t imm8);
   void sar_cl(Register dst);
@@ -991,8 +990,10 @@ class Assembler : public AssemblerBase {
   void cvtsd2ss(XMMRegister dst, XMMRegister src);
 
   void addsd(XMMRegister dst, XMMRegister src);
+  void addsd(XMMRegister dst, const Operand& src);
   void subsd(XMMRegister dst, XMMRegister src);
   void mulsd(XMMRegister dst, XMMRegister src);
+  void mulsd(XMMRegister dst, const Operand& src);
   void divsd(XMMRegister dst, XMMRegister src);
   void xorpd(XMMRegister dst, XMMRegister src);
   void xorps(XMMRegister dst, XMMRegister src);
@@ -1016,6 +1017,7 @@ class Assembler : public AssemblerBase {
   void movmskpd(Register dst, XMMRegister src);
 
   void cmpltsd(XMMRegister dst, XMMRegister src);
+  void pcmpeqd(XMMRegister dst, XMMRegister src);
 
   void movaps(XMMRegister dst, XMMRegister src);
 
@@ -1048,7 +1050,7 @@ class Assembler : public AssemblerBase {
   void psllq(XMMRegister dst, XMMRegister src);
   void psrlq(XMMRegister reg, int8_t shift);
   void psrlq(XMMRegister dst, XMMRegister src);
-  void pshufd(XMMRegister dst, XMMRegister src, int8_t shuffle);
+  void pshufd(XMMRegister dst, XMMRegister src, uint8_t shuffle);
   void pextrd(Register dst, XMMRegister src, int8_t offset) {
     pextrd(Operand(dst), src, offset);
   }
@@ -1091,8 +1093,6 @@ class Assembler : public AssemblerBase {
   void db(uint8_t data);
   void dd(uint32_t data);
 
-  int pc_offset() const { return pc_ - buffer_; }
-
   // Check if there is less than kGap bytes available in the buffer.
   // If this is the case, we need to grow the buffer before emitting
   // an instruction or relocation information.
@@ -1111,15 +1111,11 @@ class Assembler : public AssemblerBase {
 
   // Avoid overflows for displacements etc.
   static const int kMaximalBufferSize = 512*MB;
-  static const int kMinimalBufferSize = 4*KB;
 
   byte byte_at(int pos)  { return buffer_[pos]; }
   void set_byte_at(int pos, byte value) { buffer_[pos] = value; }
 
  protected:
-  bool emit_debug_code() const { return emit_debug_code_; }
-  bool predictable_code_size() const { return predictable_code_size_ ; }
-
   void movsd(XMMRegister dst, const Operand& src);
   void movsd(const Operand& dst, XMMRegister src);
 
@@ -1180,22 +1176,10 @@ class Assembler : public AssemblerBase {
   friend class CodePatcher;
   friend class EnsureSpace;
 
-  // Code buffer:
-  // The buffer into which code and relocation info are generated.
-  byte* buffer_;
-  int buffer_size_;
-  // True if the assembler owns the buffer, false if buffer is external.
-  bool own_buffer_;
-
   // code generation
-  byte* pc_;  // the program counter; moves forward
   RelocInfoWriter reloc_info_writer;
 
   PositionsRecorder positions_recorder_;
-
-  bool emit_debug_code_;
-  bool predictable_code_size_;
-
   friend class PositionsRecorder;
 };
 
diff --git a/deps/v8/src/ia32/builtins-ia32.cc b/deps/v8/src/ia32/builtins-ia32.cc
index 9bc15e9098..01785bb53e 100644
--- a/deps/v8/src/ia32/builtins-ia32.cc
+++ b/deps/v8/src/ia32/builtins-ia32.cc
@@ -538,6 +538,42 @@ void Builtins::Generate_LazyRecompile(MacroAssembler* masm) {
 }
 
 
+static void GenerateMakeCodeYoungAgainCommon(MacroAssembler* masm) {
+  // For now, we are relying on the fact that make_code_young doesn't do any
+  // garbage collection which allows us to save/restore the registers without
+  // worrying about which of them contain pointers. We also don't build an
+  // internal frame to make the code faster, since we shouldn't have to do stack
+  // crawls in MakeCodeYoung. This seems a bit fragile.
+
+  // Re-execute the code that was patched back to the young age when
+  // the stub returns.
+  __ sub(Operand(esp, 0), Immediate(5));
+  __ pushad();
+  __ mov(eax, Operand(esp, 8 * kPointerSize));
+  {
+    FrameScope scope(masm, StackFrame::MANUAL);
+    __ PrepareCallCFunction(1, ebx);
+    __ mov(Operand(esp, 0), eax);
+    __ CallCFunction(
+        ExternalReference::get_make_code_young_function(masm->isolate()), 1);
+  }
+  __ popad();
+  __ ret(0);
+}
+
+#define DEFINE_CODE_AGE_BUILTIN_GENERATOR(C)                 \
+void Builtins::Generate_Make##C##CodeYoungAgainEvenMarking(  \
+    MacroAssembler* masm) {                                  \
+  GenerateMakeCodeYoungAgainCommon(masm);                    \
+}                                                            \
+void Builtins::Generate_Make##C##CodeYoungAgainOddMarking(   \
+    MacroAssembler* masm) {                                  \
+  GenerateMakeCodeYoungAgainCommon(masm);                    \
+}
+CODE_AGE_LIST(DEFINE_CODE_AGE_BUILTIN_GENERATOR)
+#undef DEFINE_CODE_AGE_BUILTIN_GENERATOR
+
+
 static void Generate_NotifyDeoptimizedHelper(MacroAssembler* masm,
                                              Deoptimizer::BailoutType type) {
   {
diff --git a/deps/v8/src/ia32/code-stubs-ia32.cc b/deps/v8/src/ia32/code-stubs-ia32.cc
index 140db8a718..da8e2ae457 100644
--- a/deps/v8/src/ia32/code-stubs-ia32.cc
+++ b/deps/v8/src/ia32/code-stubs-ia32.cc
@@ -735,6 +735,12 @@ class FloatingPointHelper : public AllStatic {
   static void CheckSSE2OperandsAreInt32(MacroAssembler* masm,
                                         Label* non_int32,
                                         Register scratch);
+
+  static void CheckSSE2OperandIsInt32(MacroAssembler* masm,
+                                      Label* non_int32,
+                                      XMMRegister operand,
+                                      Register scratch,
+                                      XMMRegister xmm_scratch);
 };
 
 
@@ -755,11 +761,20 @@ static void IntegerConvert(MacroAssembler* masm,
   // Get exponent alone in scratch2.
   __ mov(scratch2, scratch);
   __ and_(scratch2, HeapNumber::kExponentMask);
+  __ shr(scratch2, HeapNumber::kExponentShift);
+  __ sub(scratch2, Immediate(HeapNumber::kExponentBias));
+  // Load ecx with zero.  We use this either for the final shift or
+  // for the answer.
+  __ xor_(ecx, ecx);
+  // If the exponent is above 83, the number contains no significant
+  // bits in the range 0..2^31, so the result is zero.
+  static const uint32_t kResultIsZeroExponent = 83;
+  __ cmp(scratch2, Immediate(kResultIsZeroExponent));
+  __ j(above, &done);
   if (use_sse3) {
     CpuFeatures::Scope scope(SSE3);
     // Check whether the exponent is too big for a 64 bit signed integer.
-    static const uint32_t kTooBigExponent =
-        (HeapNumber::kExponentBias + 63) << HeapNumber::kExponentShift;
+    static const uint32_t kTooBigExponent = 63;
     __ cmp(scratch2, Immediate(kTooBigExponent));
     __ j(greater_equal, conversion_failure);
     // Load x87 register with heap number.
@@ -771,15 +786,11 @@ static void IntegerConvert(MacroAssembler* masm,
     __ mov(ecx, Operand(esp, 0));  // Load low word of answer into ecx.
     __ add(esp, Immediate(sizeof(uint64_t)));  // Nolint.
   } else {
-    // Load ecx with zero.  We use this either for the final shift or
-    // for the answer.
-    __ xor_(ecx, ecx);
     // Check whether the exponent matches a 32 bit signed int that cannot be
     // represented by a Smi.  A non-smi 32 bit integer is 1.xxx * 2^30 so the
     // exponent is 30 (biased).  This is the exponent that we are fastest at and
     // also the highest exponent we can handle here.
-    const uint32_t non_smi_exponent =
-        (HeapNumber::kExponentBias + 30) << HeapNumber::kExponentShift;
+    const uint32_t non_smi_exponent = 30;
     __ cmp(scratch2, Immediate(non_smi_exponent));
     // If we have a match of the int32-but-not-Smi exponent then skip some
     // logic.
@@ -791,8 +802,7 @@ static void IntegerConvert(MacroAssembler* masm,
     {
       // Handle a big exponent.  The only reason we have this code is that the
       // >>> operator has a tendency to generate numbers with an exponent of 31.
-      const uint32_t big_non_smi_exponent =
-          (HeapNumber::kExponentBias + 31) << HeapNumber::kExponentShift;
+      const uint32_t big_non_smi_exponent = 31;
       __ cmp(scratch2, Immediate(big_non_smi_exponent));
       __ j(not_equal, conversion_failure);
       // We have the big exponent, typically from >>>.  This means the number is
@@ -821,19 +831,8 @@ static void IntegerConvert(MacroAssembler* masm,
     }
 
     __ bind(&normal_exponent);
-    // Exponent word in scratch, exponent part of exponent word in scratch2.
-    // Zero in ecx.
-    // We know the exponent is smaller than 30 (biased).  If it is less than
-    // 0 (biased) then the number is smaller in magnitude than 1.0 * 2^0, i.e.
-    // it rounds to zero.
-    const uint32_t zero_exponent =
-        (HeapNumber::kExponentBias + 0) << HeapNumber::kExponentShift;
-    __ sub(scratch2, Immediate(zero_exponent));
-    // ecx already has a Smi zero.
-    __ j(less, &done, Label::kNear);
-
-    // We have a shifted exponent between 0 and 30 in scratch2.
-    __ shr(scratch2, HeapNumber::kExponentShift);
+    // Exponent word in scratch, exponent in scratch2. Zero in ecx.
+    // We know that 0 <= exponent < 30.
     __ mov(ecx, Immediate(30));
     __ sub(ecx, scratch2);
 
@@ -868,8 +867,8 @@ static void IntegerConvert(MacroAssembler* masm,
     __ jmp(&done, Label::kNear);
     __ bind(&negative);
     __ sub(ecx, scratch2);
-    __ bind(&done);
   }
+  __ bind(&done);
 }
 
 
@@ -1192,16 +1191,17 @@ void UnaryOpStub::GenerateGenericCodeFallback(MacroAssembler* masm) {
 }
 
 
+void BinaryOpStub::Initialize() {
+  platform_specific_bit_ = CpuFeatures::IsSupported(SSE3);
+}
+
+
 void BinaryOpStub::GenerateTypeTransition(MacroAssembler* masm) {
   __ pop(ecx);  // Save return address.
   __ push(edx);
   __ push(eax);
   // Left and right arguments are now on top.
-  // Push this stub's key. Although the operation and the type info are
-  // encoded into the key, the encoding is opaque, so push them too.
   __ push(Immediate(Smi::FromInt(MinorKey())));
-  __ push(Immediate(Smi::FromInt(op_)));
-  __ push(Immediate(Smi::FromInt(operands_type_)));
 
   __ push(ecx);  // Push return address.
 
@@ -1210,7 +1210,7 @@ void BinaryOpStub::GenerateTypeTransition(MacroAssembler* masm) {
   __ TailCallExternalReference(
       ExternalReference(IC_Utility(IC::kBinaryOp_Patch),
                         masm->isolate()),
-      5,
+      3,
       1);
 }
 
@@ -1220,11 +1220,7 @@ void BinaryOpStub::GenerateTypeTransition(MacroAssembler* masm) {
 void BinaryOpStub::GenerateTypeTransitionWithSavedArgs(MacroAssembler* masm) {
   __ pop(ecx);  // Save return address.
   // Left and right arguments are already on top of the stack.
-  // Push this stub's key. Although the operation and the type info are
-  // encoded into the key, the encoding is opaque, so push them too.
   __ push(Immediate(Smi::FromInt(MinorKey())));
-  __ push(Immediate(Smi::FromInt(op_)));
-  __ push(Immediate(Smi::FromInt(operands_type_)));
 
   __ push(ecx);  // Push return address.
 
@@ -1233,73 +1229,22 @@ void BinaryOpStub::GenerateTypeTransitionWithSavedArgs(MacroAssembler* masm) {
   __ TailCallExternalReference(
       ExternalReference(IC_Utility(IC::kBinaryOp_Patch),
                         masm->isolate()),
-      5,
+      3,
       1);
 }
 
 
-void BinaryOpStub::Generate(MacroAssembler* masm) {
-  // Explicitly allow generation of nested stubs. It is safe here because
-  // generation code does not use any raw pointers.
-  AllowStubCallsScope allow_stub_calls(masm, true);
-
-  switch (operands_type_) {
-    case BinaryOpIC::UNINITIALIZED:
-      GenerateTypeTransition(masm);
-      break;
-    case BinaryOpIC::SMI:
-      GenerateSmiStub(masm);
-      break;
-    case BinaryOpIC::INT32:
-      GenerateInt32Stub(masm);
-      break;
-    case BinaryOpIC::HEAP_NUMBER:
-      GenerateHeapNumberStub(masm);
-      break;
-    case BinaryOpIC::ODDBALL:
-      GenerateOddballStub(masm);
-      break;
-    case BinaryOpIC::BOTH_STRING:
-      GenerateBothStringStub(masm);
-      break;
-    case BinaryOpIC::STRING:
-      GenerateStringStub(masm);
-      break;
-    case BinaryOpIC::GENERIC:
-      GenerateGeneric(masm);
-      break;
-    default:
-      UNREACHABLE();
-  }
-}
-
-
-void BinaryOpStub::PrintName(StringStream* stream) {
-  const char* op_name = Token::Name(op_);
-  const char* overwrite_name;
-  switch (mode_) {
-    case NO_OVERWRITE: overwrite_name = "Alloc"; break;
-    case OVERWRITE_RIGHT: overwrite_name = "OverwriteRight"; break;
-    case OVERWRITE_LEFT: overwrite_name = "OverwriteLeft"; break;
-    default: overwrite_name = "UnknownOverwrite"; break;
-  }
-  stream->Add("BinaryOpStub_%s_%s_%s",
-              op_name,
-              overwrite_name,
-              BinaryOpIC::GetName(operands_type_));
-}
-
-
-void BinaryOpStub::GenerateSmiCode(
+static void BinaryOpStub_GenerateSmiCode(
     MacroAssembler* masm,
     Label* slow,
-    SmiCodeGenerateHeapNumberResults allow_heapnumber_results) {
+    BinaryOpStub::SmiCodeGenerateHeapNumberResults allow_heapnumber_results,
+    Token::Value op) {
   // 1. Move arguments into edx, eax except for DIV and MOD, which need the
   // dividend in eax and edx free for the division.  Use eax, ebx for those.
   Comment load_comment(masm, "-- Load arguments");
   Register left = edx;
   Register right = eax;
-  if (op_ == Token::DIV || op_ == Token::MOD) {
+  if (op == Token::DIV || op == Token::MOD) {
     left = eax;
     right = ebx;
     __ mov(ebx, eax);
@@ -1312,7 +1257,7 @@ void BinaryOpStub::GenerateSmiCode(
   Label not_smis;
   Register combined = ecx;
   ASSERT(!left.is(combined) && !right.is(combined));
-  switch (op_) {
+  switch (op) {
     case Token::BIT_OR:
       // Perform the operation into eax and smi check the result.  Preserve
       // eax in case the result is not a smi.
@@ -1356,7 +1301,7 @@ void BinaryOpStub::GenerateSmiCode(
   // eax and check the result if necessary.
   Comment perform_smi(masm, "-- Perform smi operation");
   Label use_fp_on_smis;
-  switch (op_) {
+  switch (op) {
     case Token::BIT_OR:
       // Nothing to do.
       break;
@@ -1490,7 +1435,7 @@ void BinaryOpStub::GenerateSmiCode(
   }
 
   // 5. Emit return of result in eax.  Some operations have registers pushed.
-  switch (op_) {
+  switch (op) {
     case Token::ADD:
     case Token::SUB:
     case Token::MUL:
@@ -1513,9 +1458,9 @@ void BinaryOpStub::GenerateSmiCode(
   // 6. For some operations emit inline code to perform floating point
   // operations on known smis (e.g., if the result of the operation
   // overflowed the smi range).
-  if (allow_heapnumber_results == NO_HEAPNUMBER_RESULTS) {
+  if (allow_heapnumber_results == BinaryOpStub::NO_HEAPNUMBER_RESULTS) {
     __ bind(&use_fp_on_smis);
-    switch (op_) {
+    switch (op) {
       // Undo the effects of some operations, and some register moves.
       case Token::SHL:
         // The arguments are saved on the stack, and only used from there.
@@ -1543,8 +1488,8 @@ void BinaryOpStub::GenerateSmiCode(
     }
     __ jmp(&not_smis);
   } else {
-    ASSERT(allow_heapnumber_results == ALLOW_HEAPNUMBER_RESULTS);
-    switch (op_) {
+    ASSERT(allow_heapnumber_results == BinaryOpStub::ALLOW_HEAPNUMBER_RESULTS);
+    switch (op) {
       case Token::SHL:
       case Token::SHR: {
         Comment perform_float(masm, "-- Perform float operation on smis");
@@ -1555,13 +1500,13 @@ void BinaryOpStub::GenerateSmiCode(
         // Store the result in the HeapNumber and return.
         // It's OK to overwrite the arguments on the stack because we
         // are about to return.
-        if (op_ == Token::SHR) {
+        if (op == Token::SHR) {
           __ mov(Operand(esp, 1 * kPointerSize), left);
           __ mov(Operand(esp, 2 * kPointerSize), Immediate(0));
           __ fild_d(Operand(esp, 1 * kPointerSize));
           __ fstp_d(FieldOperand(eax, HeapNumber::kValueOffset));
         } else {
-          ASSERT_EQ(Token::SHL, op_);
+          ASSERT_EQ(Token::SHL, op);
           if (CpuFeatures::IsSupported(SSE2)) {
             CpuFeatures::Scope use_sse2(SSE2);
             __ cvtsi2sd(xmm0, left);
@@ -1583,7 +1528,7 @@ void BinaryOpStub::GenerateSmiCode(
         Comment perform_float(masm, "-- Perform float operation on smis");
         __ bind(&use_fp_on_smis);
         // Restore arguments to edx, eax.
-        switch (op_) {
+        switch (op) {
           case Token::ADD:
             // Revert right = right + left.
             __ sub(right, left);
@@ -1609,7 +1554,7 @@ void BinaryOpStub::GenerateSmiCode(
         if (CpuFeatures::IsSupported(SSE2)) {
           CpuFeatures::Scope use_sse2(SSE2);
           FloatingPointHelper::LoadSSE2Smis(masm, ebx);
-          switch (op_) {
+          switch (op) {
             case Token::ADD: __ addsd(xmm0, xmm1); break;
             case Token::SUB: __ subsd(xmm0, xmm1); break;
             case Token::MUL: __ mulsd(xmm0, xmm1); break;
@@ -1619,7 +1564,7 @@ void BinaryOpStub::GenerateSmiCode(
           __ movdbl(FieldOperand(ecx, HeapNumber::kValueOffset), xmm0);
         } else {  // SSE2 not available, use FPU.
           FloatingPointHelper::LoadFloatSmis(masm, ebx);
-          switch (op_) {
+          switch (op) {
             case Token::ADD: __ faddp(1); break;
             case Token::SUB: __ fsubp(1); break;
             case Token::MUL: __ fmulp(1); break;
@@ -1642,7 +1587,7 @@ void BinaryOpStub::GenerateSmiCode(
   // edx and eax.
   Comment done_comment(masm, "-- Enter non-smi code");
   __ bind(&not_smis);
-  switch (op_) {
+  switch (op) {
     case Token::BIT_OR:
     case Token::SHL:
     case Token::SAR:
@@ -1689,9 +1634,11 @@ void BinaryOpStub::GenerateSmiStub(MacroAssembler* masm) {
 
   if (result_type_ == BinaryOpIC::UNINITIALIZED ||
       result_type_ == BinaryOpIC::SMI) {
-    GenerateSmiCode(masm, &call_runtime, NO_HEAPNUMBER_RESULTS);
+    BinaryOpStub_GenerateSmiCode(
+        masm, &call_runtime, NO_HEAPNUMBER_RESULTS, op_);
   } else {
-    GenerateSmiCode(masm, &call_runtime, ALLOW_HEAPNUMBER_RESULTS);
+    BinaryOpStub_GenerateSmiCode(
+        masm, &call_runtime, ALLOW_HEAPNUMBER_RESULTS, op_);
   }
   __ bind(&call_runtime);
   switch (op_) {
@@ -1716,19 +1663,9 @@ void BinaryOpStub::GenerateSmiStub(MacroAssembler* masm) {
 }
 
 
-void BinaryOpStub::GenerateStringStub(MacroAssembler* masm) {
-  ASSERT(operands_type_ == BinaryOpIC::STRING);
-  ASSERT(op_ == Token::ADD);
-  // Try to add arguments as strings, otherwise, transition to the generic
-  // BinaryOpIC type.
-  GenerateAddStrings(masm);
-  GenerateTypeTransition(masm);
-}
-
-
 void BinaryOpStub::GenerateBothStringStub(MacroAssembler* masm) {
   Label call_runtime;
-  ASSERT(operands_type_ == BinaryOpIC::BOTH_STRING);
+  ASSERT(left_type_ == BinaryOpIC::STRING && right_type_ == BinaryOpIC::STRING);
   ASSERT(op_ == Token::ADD);
   // If both arguments are strings, call the string add stub.
   // Otherwise, do a transition.
@@ -1756,6 +1693,11 @@ void BinaryOpStub::GenerateBothStringStub(MacroAssembler* masm) {
 }
 
 
+static void BinaryOpStub_GenerateHeapResultAllocation(MacroAssembler* masm,
+                                                      Label* alloc_failure,
+                                                      OverwriteMode mode);
+
+
 // Input:
 //    edx: left operand (tagged)
 //    eax: right operand (tagged)
@@ -1763,7 +1705,7 @@ void BinaryOpStub::GenerateBothStringStub(MacroAssembler* masm) {
 //    eax: result (tagged)
 void BinaryOpStub::GenerateInt32Stub(MacroAssembler* masm) {
   Label call_runtime;
-  ASSERT(operands_type_ == BinaryOpIC::INT32);
+  ASSERT(Max(left_type_, right_type_) == BinaryOpIC::INT32);
 
   // Floating point case.
   switch (op_) {
@@ -1776,6 +1718,18 @@ void BinaryOpStub::GenerateInt32Stub(MacroAssembler* masm) {
       Label not_int32;
       if (CpuFeatures::IsSupported(SSE2)) {
         CpuFeatures::Scope use_sse2(SSE2);
+        // It could be that only SMIs have been seen at either the left
+        // or the right operand. For precise type feedback, patch the IC
+        // again if this changes.
+        // In theory, we would need the same check in the non-SSE2 case,
+        // but since we don't support Crankshaft on such hardware we can
+        // afford not to care about precise type feedback.
+        if (left_type_ == BinaryOpIC::SMI) {
+          __ JumpIfNotSmi(edx, &not_int32);
+        }
+        if (right_type_ == BinaryOpIC::SMI) {
+          __ JumpIfNotSmi(eax, &not_int32);
+        }
         FloatingPointHelper::LoadSSE2Operands(masm, &not_floats);
         FloatingPointHelper::CheckSSE2OperandsAreInt32(masm, &not_int32, ecx);
         if (op_ == Token::MOD) {
@@ -1793,11 +1747,12 @@ void BinaryOpStub::GenerateInt32Stub(MacroAssembler* masm) {
           if (result_type_ <= BinaryOpIC::INT32) {
             __ cvttsd2si(ecx, Operand(xmm0));
             __ cvtsi2sd(xmm2, ecx);
-            __ ucomisd(xmm0, xmm2);
-            __ j(not_zero, &not_int32);
-            __ j(carry, &not_int32);
+            __ pcmpeqd(xmm2, xmm0);
+            __ movmskpd(ecx, xmm2);
+            __ test(ecx, Immediate(1));
+            __ j(zero, &not_int32);
           }
-          GenerateHeapResultAllocation(masm, &call_runtime);
+          BinaryOpStub_GenerateHeapResultAllocation(masm, &call_runtime, mode_);
           __ movdbl(FieldOperand(eax, HeapNumber::kValueOffset), xmm0);
           __ ret(0);
         }
@@ -1823,7 +1778,8 @@ void BinaryOpStub::GenerateInt32Stub(MacroAssembler* masm) {
             default: UNREACHABLE();
           }
           Label after_alloc_failure;
-          GenerateHeapResultAllocation(masm, &after_alloc_failure);
+          BinaryOpStub_GenerateHeapResultAllocation(
+              masm, &after_alloc_failure, mode_);
           __ fstp_d(FieldOperand(eax, HeapNumber::kValueOffset));
           __ ret(0);
           __ bind(&after_alloc_failure);
@@ -1848,10 +1804,14 @@ void BinaryOpStub::GenerateInt32Stub(MacroAssembler* masm) {
       Label not_floats;
       Label not_int32;
       Label non_smi_result;
+      // We do not check the input arguments here, as any value is
+      // unconditionally truncated to an int32 anyway. To get the
+      // right optimized code, int32 type feedback is just right.
+      bool use_sse3 = platform_specific_bit_;
       FloatingPointHelper::LoadUnknownsAsIntegers(masm,
-                                                  use_sse3_,
+                                                  use_sse3,
                                                   &not_floats);
-      FloatingPointHelper::CheckLoadedIntegersWereInt32(masm, use_sse3_,
+      FloatingPointHelper::CheckLoadedIntegersWereInt32(masm, use_sse3,
                                                         &not_int32);
       switch (op_) {
         case Token::BIT_OR:  __ or_(eax, ecx); break;
@@ -1924,44 +1884,24 @@ void BinaryOpStub::GenerateInt32Stub(MacroAssembler* masm) {
 
   switch (op_) {
     case Token::ADD:
-      GenerateRegisterArgsPush(masm);
-      __ InvokeBuiltin(Builtins::ADD, JUMP_FUNCTION);
-      break;
     case Token::SUB:
-      GenerateRegisterArgsPush(masm);
-      __ InvokeBuiltin(Builtins::SUB, JUMP_FUNCTION);
-      break;
     case Token::MUL:
-      GenerateRegisterArgsPush(masm);
-      __ InvokeBuiltin(Builtins::MUL, JUMP_FUNCTION);
-      break;
     case Token::DIV:
       GenerateRegisterArgsPush(masm);
-      __ InvokeBuiltin(Builtins::DIV, JUMP_FUNCTION);
       break;
     case Token::MOD:
-      break;
+      return;  // Handled above.
     case Token::BIT_OR:
-      __ InvokeBuiltin(Builtins::BIT_OR, JUMP_FUNCTION);
-      break;
     case Token::BIT_AND:
-      __ InvokeBuiltin(Builtins::BIT_AND, JUMP_FUNCTION);
-      break;
     case Token::BIT_XOR:
-      __ InvokeBuiltin(Builtins::BIT_XOR, JUMP_FUNCTION);
-      break;
     case Token::SAR:
-      __ InvokeBuiltin(Builtins::SAR, JUMP_FUNCTION);
-      break;
     case Token::SHL:
-      __ InvokeBuiltin(Builtins::SHL, JUMP_FUNCTION);
-      break;
     case Token::SHR:
-      __ InvokeBuiltin(Builtins::SHR, JUMP_FUNCTION);
       break;
     default:
       UNREACHABLE();
   }
+  GenerateCallRuntime(masm);
 }
 
 
@@ -2010,7 +1950,28 @@ void BinaryOpStub::GenerateHeapNumberStub(MacroAssembler* masm) {
       Label not_floats;
       if (CpuFeatures::IsSupported(SSE2)) {
         CpuFeatures::Scope use_sse2(SSE2);
+
+        // It could be that only SMIs have been seen at either the left
+        // or the right operand. For precise type feedback, patch the IC
+        // again if this changes.
+        // In theory, we would need the same check in the non-SSE2 case,
+        // but since we don't support Crankshaft on such hardware we can
+        // afford not to care about precise type feedback.
+        if (left_type_ == BinaryOpIC::SMI) {
+          __ JumpIfNotSmi(edx, &not_floats);
+        }
+        if (right_type_ == BinaryOpIC::SMI) {
+          __ JumpIfNotSmi(eax, &not_floats);
+        }
         FloatingPointHelper::LoadSSE2Operands(masm, &not_floats);
+        if (left_type_ == BinaryOpIC::INT32) {
+          FloatingPointHelper::CheckSSE2OperandIsInt32(
+              masm, &not_floats, xmm0, ecx, xmm2);
+        }
+        if (right_type_ == BinaryOpIC::INT32) {
+          FloatingPointHelper::CheckSSE2OperandIsInt32(
+              masm, &not_floats, xmm1, ecx, xmm2);
+        }
 
         switch (op_) {
           case Token::ADD: __ addsd(xmm0, xmm1); break;
@@ -2019,7 +1980,7 @@ void BinaryOpStub::GenerateHeapNumberStub(MacroAssembler* masm) {
           case Token::DIV: __ divsd(xmm0, xmm1); break;
           default: UNREACHABLE();
         }
-        GenerateHeapResultAllocation(masm, &call_runtime);
+        BinaryOpStub_GenerateHeapResultAllocation(masm, &call_runtime, mode_);
         __ movdbl(FieldOperand(eax, HeapNumber::kValueOffset), xmm0);
         __ ret(0);
       } else {  // SSE2 not available, use FPU.
@@ -2036,7 +1997,8 @@ void BinaryOpStub::GenerateHeapNumberStub(MacroAssembler* masm) {
           default: UNREACHABLE();
         }
         Label after_alloc_failure;
-        GenerateHeapResultAllocation(masm, &after_alloc_failure);
+        BinaryOpStub_GenerateHeapResultAllocation(
+            masm, &after_alloc_failure, mode_);
         __ fstp_d(FieldOperand(eax, HeapNumber::kValueOffset));
         __ ret(0);
         __ bind(&after_alloc_failure);
@@ -2062,8 +2024,12 @@ void BinaryOpStub::GenerateHeapNumberStub(MacroAssembler* masm) {
       GenerateRegisterArgsPush(masm);
       Label not_floats;
       Label non_smi_result;
+      // We do not check the input arguments here, as any value is
+      // unconditionally truncated to an int32 anyway. To get the
+      // right optimized code, int32 type feedback is just right.
+      bool use_sse3 = platform_specific_bit_;
       FloatingPointHelper::LoadUnknownsAsIntegers(masm,
-                                                  use_sse3_,
+                                                  use_sse3,
                                                   &not_floats);
       switch (op_) {
         case Token::BIT_OR:  __ or_(eax, ecx); break;
@@ -2135,46 +2101,23 @@ void BinaryOpStub::GenerateHeapNumberStub(MacroAssembler* masm) {
 
   switch (op_) {
     case Token::ADD:
-      GenerateRegisterArgsPush(masm);
-      __ InvokeBuiltin(Builtins::ADD, JUMP_FUNCTION);
-      break;
     case Token::SUB:
-      GenerateRegisterArgsPush(masm);
-      __ InvokeBuiltin(Builtins::SUB, JUMP_FUNCTION);
-      break;
     case Token::MUL:
-      GenerateRegisterArgsPush(masm);
-      __ InvokeBuiltin(Builtins::MUL, JUMP_FUNCTION);
-      break;
     case Token::DIV:
-      GenerateRegisterArgsPush(masm);
-      __ InvokeBuiltin(Builtins::DIV, JUMP_FUNCTION);
-      break;
     case Token::MOD:
       GenerateRegisterArgsPush(masm);
-      __ InvokeBuiltin(Builtins::MOD, JUMP_FUNCTION);
       break;
     case Token::BIT_OR:
-      __ InvokeBuiltin(Builtins::BIT_OR, JUMP_FUNCTION);
-      break;
     case Token::BIT_AND:
-      __ InvokeBuiltin(Builtins::BIT_AND, JUMP_FUNCTION);
-      break;
     case Token::BIT_XOR:
-      __ InvokeBuiltin(Builtins::BIT_XOR, JUMP_FUNCTION);
-      break;
     case Token::SAR:
-      __ InvokeBuiltin(Builtins::SAR, JUMP_FUNCTION);
-      break;
     case Token::SHL:
-      __ InvokeBuiltin(Builtins::SHL, JUMP_FUNCTION);
-      break;
     case Token::SHR:
-      __ InvokeBuiltin(Builtins::SHR, JUMP_FUNCTION);
       break;
     default:
       UNREACHABLE();
   }
+  GenerateCallRuntime(masm);
 }
 
 
@@ -2203,7 +2146,8 @@ void BinaryOpStub::GenerateGeneric(MacroAssembler* masm) {
       UNREACHABLE();
   }
 
-  GenerateSmiCode(masm, &call_runtime, ALLOW_HEAPNUMBER_RESULTS);
+  BinaryOpStub_GenerateSmiCode(
+      masm, &call_runtime, ALLOW_HEAPNUMBER_RESULTS, op_);
 
   // Floating point case.
   switch (op_) {
@@ -2223,7 +2167,7 @@ void BinaryOpStub::GenerateGeneric(MacroAssembler* masm) {
           case Token::DIV: __ divsd(xmm0, xmm1); break;
           default: UNREACHABLE();
         }
-        GenerateHeapResultAllocation(masm, &call_runtime);
+        BinaryOpStub_GenerateHeapResultAllocation(masm, &call_runtime, mode_);
         __ movdbl(FieldOperand(eax, HeapNumber::kValueOffset), xmm0);
         __ ret(0);
       } else {  // SSE2 not available, use FPU.
@@ -2240,7 +2184,8 @@ void BinaryOpStub::GenerateGeneric(MacroAssembler* masm) {
           default: UNREACHABLE();
         }
         Label after_alloc_failure;
-        GenerateHeapResultAllocation(masm, &after_alloc_failure);
+        BinaryOpStub_GenerateHeapResultAllocation(
+            masm, &after_alloc_failure, mode_);
         __ fstp_d(FieldOperand(eax, HeapNumber::kValueOffset));
         __ ret(0);
         __ bind(&after_alloc_failure);
@@ -2261,8 +2206,9 @@ void BinaryOpStub::GenerateGeneric(MacroAssembler* masm) {
     case Token::SHL:
     case Token::SHR: {
       Label non_smi_result;
+      bool use_sse3 = platform_specific_bit_;
       FloatingPointHelper::LoadUnknownsAsIntegers(masm,
-                                                  use_sse3_,
+                                                  use_sse3,
                                                   &call_runtime);
       switch (op_) {
         case Token::BIT_OR:  __ or_(eax, ecx); break;
@@ -2329,48 +2275,26 @@ void BinaryOpStub::GenerateGeneric(MacroAssembler* masm) {
   // result.
   __ bind(&call_runtime);
   switch (op_) {
-    case Token::ADD: {
+    case Token::ADD:
       GenerateAddStrings(masm);
-      GenerateRegisterArgsPush(masm);
-      __ InvokeBuiltin(Builtins::ADD, JUMP_FUNCTION);
-      break;
-    }
+      // Fall through.
     case Token::SUB:
-      GenerateRegisterArgsPush(masm);
-      __ InvokeBuiltin(Builtins::SUB, JUMP_FUNCTION);
-      break;
     case Token::MUL:
-      GenerateRegisterArgsPush(masm);
-      __ InvokeBuiltin(Builtins::MUL, JUMP_FUNCTION);
-      break;
     case Token::DIV:
       GenerateRegisterArgsPush(masm);
-      __ InvokeBuiltin(Builtins::DIV, JUMP_FUNCTION);
       break;
     case Token::MOD:
-      __ InvokeBuiltin(Builtins::MOD, JUMP_FUNCTION);
-      break;
     case Token::BIT_OR:
-      __ InvokeBuiltin(Builtins::BIT_OR, JUMP_FUNCTION);
-      break;
     case Token::BIT_AND:
-      __ InvokeBuiltin(Builtins::BIT_AND, JUMP_FUNCTION);
-      break;
     case Token::BIT_XOR:
-      __ InvokeBuiltin(Builtins::BIT_XOR, JUMP_FUNCTION);
-      break;
     case Token::SAR:
-      __ InvokeBuiltin(Builtins::SAR, JUMP_FUNCTION);
-      break;
     case Token::SHL:
-      __ InvokeBuiltin(Builtins::SHL, JUMP_FUNCTION);
-      break;
     case Token::SHR:
-      __ InvokeBuiltin(Builtins::SHR, JUMP_FUNCTION);
       break;
     default:
       UNREACHABLE();
   }
+  GenerateCallRuntime(masm);
 }
 
 
@@ -2406,11 +2330,10 @@ void BinaryOpStub::GenerateAddStrings(MacroAssembler* masm) {
 }
 
 
-void BinaryOpStub::GenerateHeapResultAllocation(
-    MacroAssembler* masm,
-    Label* alloc_failure) {
+static void BinaryOpStub_GenerateHeapResultAllocation(MacroAssembler* masm,
+                                                      Label* alloc_failure,
+                                                      OverwriteMode mode) {
   Label skip_allocation;
-  OverwriteMode mode = mode_;
   switch (mode) {
     case OVERWRITE_LEFT: {
       // If the argument in edx is already an object, we skip the
@@ -2922,16 +2845,22 @@ void FloatingPointHelper::LoadSSE2Smis(MacroAssembler* masm,
 void FloatingPointHelper::CheckSSE2OperandsAreInt32(MacroAssembler* masm,
                                                     Label* non_int32,
                                                     Register scratch) {
-  __ cvttsd2si(scratch, Operand(xmm0));
-  __ cvtsi2sd(xmm2, scratch);
-  __ ucomisd(xmm0, xmm2);
-  __ j(not_zero, non_int32);
-  __ j(carry, non_int32);
-  __ cvttsd2si(scratch, Operand(xmm1));
-  __ cvtsi2sd(xmm2, scratch);
-  __ ucomisd(xmm1, xmm2);
-  __ j(not_zero, non_int32);
-  __ j(carry, non_int32);
+  CheckSSE2OperandIsInt32(masm, non_int32, xmm0, scratch, xmm2);
+  CheckSSE2OperandIsInt32(masm, non_int32, xmm1, scratch, xmm2);
+}
+
+
+void FloatingPointHelper::CheckSSE2OperandIsInt32(MacroAssembler* masm,
+                                                  Label* non_int32,
+                                                  XMMRegister operand,
+                                                  Register scratch,
+                                                  XMMRegister xmm_scratch) {
+  __ cvttsd2si(scratch, Operand(operand));
+  __ cvtsi2sd(xmm_scratch, scratch);
+  __ pcmpeqd(xmm_scratch, operand);
+  __ movmskpd(scratch, xmm_scratch);
+  __ test(scratch, Immediate(1));
+  __ j(zero, non_int32);
 }
 
 
@@ -3186,10 +3115,10 @@ void MathPowStub::Generate(MacroAssembler* masm) {
     // F2XM1 calculates 2^st(0) - 1 for -1 < st(0) < 1
     __ f2xm1();    // 2^(X-rnd(X)) - 1, rnd(X)
     __ fld1();     // 1, 2^(X-rnd(X)) - 1, rnd(X)
-    __ faddp(1);   // 1, 2^(X-rnd(X)), rnd(X)
+    __ faddp(1);   // 2^(X-rnd(X)), rnd(X)
     // FSCALE calculates st(0) * 2^st(1)
     __ fscale();   // 2^X, rnd(X)
-    __ fstp(1);
+    __ fstp(1);    // 2^X
     // Bail out to runtime in case of exceptions in the status word.
     __ fnstsw_ax();
     __ test_b(eax, 0x5F);  // We check for all but precision exception.
@@ -3213,21 +3142,28 @@ void MathPowStub::Generate(MacroAssembler* masm) {
   __ movsd(double_scratch2, double_result);  // Load double_exponent with 1.
 
   // Get absolute value of exponent.
-  Label no_neg, while_true, no_multiply;
+  Label no_neg, while_true, while_false;
   __ test(scratch, scratch);
   __ j(positive, &no_neg, Label::kNear);
   __ neg(scratch);
   __ bind(&no_neg);
 
-  __ bind(&while_true);
+  __ j(zero, &while_false, Label::kNear);
   __ shr(scratch, 1);
-  __ j(not_carry, &no_multiply, Label::kNear);
-  __ mulsd(double_result, double_scratch);
-  __ bind(&no_multiply);
+  // Above condition means CF==0 && ZF==0.  This means that the
+  // bit that has been shifted out is 0 and the result is not 0.
+  __ j(above, &while_true, Label::kNear);
+  __ movsd(double_result, double_scratch);
+  __ j(zero, &while_false, Label::kNear);
 
+  __ bind(&while_true);
+  __ shr(scratch, 1);
   __ mulsd(double_scratch, double_scratch);
+  __ j(above, &while_true, Label::kNear);
+  __ mulsd(double_result, double_scratch);
   __ j(not_zero, &while_true);
 
+  __ bind(&while_false);
   // scratch has the original value of the exponent - if the exponent is
   // negative, return 1/result.
   __ test(exponent, exponent);
@@ -3585,7 +3521,7 @@ void ArgumentsAccessStub::GenerateNewNonStrictFast(MacroAssembler* masm) {
   __ bind(&runtime);
   __ pop(eax);  // Remove saved parameter count.
   __ mov(Operand(esp, 1 * kPointerSize), ecx);  // Patch argument count.
-  __ TailCallRuntime(Runtime::kNewStrictArgumentsFast, 3, 1);
+  __ TailCallRuntime(Runtime::kNewArgumentsFast, 3, 1);
 }
 
 
@@ -3952,9 +3888,9 @@ void RegExpExecStub::Generate(MacroAssembler* masm) {
   __ test(ecx, ecx);
   __ j(zero, &setup_two_byte, Label::kNear);
   __ SmiUntag(esi);
-  __ lea(ecx, FieldOperand(eax, esi, times_1, SeqAsciiString::kHeaderSize));
+  __ lea(ecx, FieldOperand(eax, esi, times_1, SeqOneByteString::kHeaderSize));
   __ mov(Operand(esp, 3 * kPointerSize), ecx);  // Argument 4.
-  __ lea(ecx, FieldOperand(eax, ebx, times_1, SeqAsciiString::kHeaderSize));
+  __ lea(ecx, FieldOperand(eax, ebx, times_1, SeqOneByteString::kHeaderSize));
   __ mov(Operand(esp, 2 * kPointerSize), ecx);  // Argument 3.
   __ jmp(&setup_rest, Label::kNear);
 
@@ -4100,7 +4036,7 @@ void RegExpExecStub::Generate(MacroAssembler* masm) {
   }
   __ mov(eax, FieldOperand(eax, ExternalString::kResourceDataOffset));
   // Move the pointer so that offset-wise, it looks like a sequential string.
-  STATIC_ASSERT(SeqTwoByteString::kHeaderSize == SeqAsciiString::kHeaderSize);
+  STATIC_ASSERT(SeqTwoByteString::kHeaderSize == SeqOneByteString::kHeaderSize);
   __ sub(eax, Immediate(SeqTwoByteString::kHeaderSize - kHeapObjectTag));
   STATIC_ASSERT(kTwoByteStringTag == 0);
   __ test_b(ebx, kStringEncodingMask);
@@ -4170,15 +4106,15 @@ void RegExpConstructResultStub::Generate(MacroAssembler* masm) {
          Immediate(factory->fixed_array_map()));
   // Set length.
   __ mov(FieldOperand(ebx, FixedArray::kLengthOffset), ecx);
-  // Fill contents of fixed-array with the-hole.
+  // Fill contents of fixed-array with undefined.
   __ SmiUntag(ecx);
-  __ mov(edx, Immediate(factory->the_hole_value()));
+  __ mov(edx, Immediate(factory->undefined_value()));
   __ lea(ebx, FieldOperand(ebx, FixedArray::kHeaderSize));
-  // Fill fixed array elements with hole.
+  // Fill fixed array elements with undefined.
   // eax: JSArray.
   // ecx: Number of elements to fill.
   // ebx: Start of elements in FixedArray.
-  // edx: the hole.
+  // edx: undefined.
   Label loop;
   __ test(ecx, ecx);
   __ bind(&loop);
@@ -4313,30 +4249,59 @@ static int NegativeComparisonResult(Condition cc) {
   return (cc == greater || cc == greater_equal) ? LESS : GREATER;
 }
 
-void CompareStub::Generate(MacroAssembler* masm) {
-  ASSERT(lhs_.is(no_reg) && rhs_.is(no_reg));
 
+static void CheckInputType(MacroAssembler* masm,
+                           Register input,
+                           CompareIC::State expected,
+                           Label* fail) {
+  Label ok;
+  if (expected == CompareIC::SMI) {
+    __ JumpIfNotSmi(input, fail);
+  } else if (expected == CompareIC::HEAP_NUMBER) {
+    __ JumpIfSmi(input, &ok);
+    __ cmp(FieldOperand(input, HeapObject::kMapOffset),
+           Immediate(masm->isolate()->factory()->heap_number_map()));
+    __ j(not_equal, fail);
+  }
+  // We could be strict about symbol/string here, but as long as
+  // hydrogen doesn't care, the stub doesn't have to care either.
+  __ bind(&ok);
+}
+
+
+static void BranchIfNonSymbol(MacroAssembler* masm,
+                              Label* label,
+                              Register object,
+                              Register scratch) {
+  __ JumpIfSmi(object, label);
+  __ mov(scratch, FieldOperand(object, HeapObject::kMapOffset));
+  __ movzx_b(scratch, FieldOperand(scratch, Map::kInstanceTypeOffset));
+  __ and_(scratch, kIsSymbolMask | kIsNotStringMask);
+  __ cmp(scratch, kSymbolTag | kStringTag);
+  __ j(not_equal, label);
+}
+
+
+void ICCompareStub::GenerateGeneric(MacroAssembler* masm) {
   Label check_unequal_objects;
+  Condition cc = GetCondition();
 
-  // Compare two smis if required.
-  if (include_smi_compare_) {
-    Label non_smi, smi_done;
-    __ mov(ecx, edx);
-    __ or_(ecx, eax);
-    __ JumpIfNotSmi(ecx, &non_smi, Label::kNear);
-    __ sub(edx, eax);  // Return on the result of the subtraction.
-    __ j(no_overflow, &smi_done, Label::kNear);
-    __ not_(edx);  // Correct sign in case of overflow. edx is never 0 here.
-    __ bind(&smi_done);
-    __ mov(eax, edx);
-    __ ret(0);
-    __ bind(&non_smi);
-  } else if (FLAG_debug_code) {
-    __ mov(ecx, edx);
-    __ or_(ecx, eax);
-    __ test(ecx, Immediate(kSmiTagMask));
-    __ Assert(not_zero, "Unexpected smi operands.");
-  }
+  Label miss;
+  CheckInputType(masm, edx, left_, &miss);
+  CheckInputType(masm, eax, right_, &miss);
+
+  // Compare two smis.
+  Label non_smi, smi_done;
+  __ mov(ecx, edx);
+  __ or_(ecx, eax);
+  __ JumpIfNotSmi(ecx, &non_smi, Label::kNear);
+  __ sub(edx, eax);  // Return on the result of the subtraction.
+  __ j(no_overflow, &smi_done, Label::kNear);
+  __ not_(edx);  // Correct sign in case of overflow. edx is never 0 here.
+  __ bind(&smi_done);
+  __ mov(eax, edx);
+  __ ret(0);
+  __ bind(&non_smi);
 
   // NOTICE! This code is only reached after a smi-fast-case check, so
   // it is certain that at least one operand isn't a smi.
@@ -4348,67 +4313,61 @@ void CompareStub::Generate(MacroAssembler* masm) {
     __ cmp(eax, edx);
     __ j(not_equal, &not_identical);
 
-    if (cc_ != equal) {
+    if (cc != equal) {
       // Check for undefined.  undefined OP undefined is false even though
       // undefined == undefined.
       Label check_for_nan;
       __ cmp(edx, masm->isolate()->factory()->undefined_value());
       __ j(not_equal, &check_for_nan, Label::kNear);
-      __ Set(eax, Immediate(Smi::FromInt(NegativeComparisonResult(cc_))));
+      __ Set(eax, Immediate(Smi::FromInt(NegativeComparisonResult(cc))));
       __ ret(0);
       __ bind(&check_for_nan);
     }
 
     // Test for NaN. Sadly, we can't just compare to factory->nan_value(),
     // so we do the second best thing - test it ourselves.
-    // Note: if cc_ != equal, never_nan_nan_ is not used.
-    if (never_nan_nan_ && (cc_ == equal)) {
-      __ Set(eax, Immediate(Smi::FromInt(EQUAL)));
+    Label heap_number;
+    __ cmp(FieldOperand(edx, HeapObject::kMapOffset),
+           Immediate(masm->isolate()->factory()->heap_number_map()));
+    __ j(equal, &heap_number, Label::kNear);
+    if (cc != equal) {
+      // Call runtime on identical JSObjects.  Otherwise return equal.
+      __ CmpObjectType(eax, FIRST_SPEC_OBJECT_TYPE, ecx);
+      __ j(above_equal, &not_identical);
+    }
+    __ Set(eax, Immediate(Smi::FromInt(EQUAL)));
+    __ ret(0);
+
+    __ bind(&heap_number);
+    // It is a heap number, so return non-equal if it's NaN and equal if
+    // it's not NaN.
+    // The representation of NaN values has all exponent bits (52..62) set,
+    // and not all mantissa bits (0..51) clear.
+    // We only accept QNaNs, which have bit 51 set.
+    // Read top bits of double representation (second word of value).
+
+    // Value is a QNaN if value & kQuietNaNMask == kQuietNaNMask, i.e.,
+    // all bits in the mask are set. We only need to check the word
+    // that contains the exponent and high bit of the mantissa.
+    STATIC_ASSERT(((kQuietNaNHighBitsMask << 1) & 0x80000000u) != 0);
+    __ mov(edx, FieldOperand(edx, HeapNumber::kExponentOffset));
+    __ Set(eax, Immediate(0));
+    // Shift value and mask so kQuietNaNHighBitsMask applies to topmost
+    // bits.
+    __ add(edx, edx);
+    __ cmp(edx, kQuietNaNHighBitsMask << 1);
+    if (cc == equal) {
+      STATIC_ASSERT(EQUAL != 1);
+      __ setcc(above_equal, eax);
       __ ret(0);
     } else {
-      Label heap_number;
-      __ cmp(FieldOperand(edx, HeapObject::kMapOffset),
-             Immediate(masm->isolate()->factory()->heap_number_map()));
-      __ j(equal, &heap_number, Label::kNear);
-      if (cc_ != equal) {
-        // Call runtime on identical JSObjects.  Otherwise return equal.
-        __ CmpObjectType(eax, FIRST_SPEC_OBJECT_TYPE, ecx);
-        __ j(above_equal, &not_identical);
-      }
+      Label nan;
+      __ j(above_equal, &nan, Label::kNear);
       __ Set(eax, Immediate(Smi::FromInt(EQUAL)));
       __ ret(0);
-
-      __ bind(&heap_number);
-      // It is a heap number, so return non-equal if it's NaN and equal if
-      // it's not NaN.
-      // The representation of NaN values has all exponent bits (52..62) set,
-      // and not all mantissa bits (0..51) clear.
-      // We only accept QNaNs, which have bit 51 set.
-      // Read top bits of double representation (second word of value).
-
-      // Value is a QNaN if value & kQuietNaNMask == kQuietNaNMask, i.e.,
-      // all bits in the mask are set. We only need to check the word
-      // that contains the exponent and high bit of the mantissa.
-      STATIC_ASSERT(((kQuietNaNHighBitsMask << 1) & 0x80000000u) != 0);
-      __ mov(edx, FieldOperand(edx, HeapNumber::kExponentOffset));
-      __ Set(eax, Immediate(0));
-      // Shift value and mask so kQuietNaNHighBitsMask applies to topmost
-      // bits.
-      __ add(edx, edx);
-      __ cmp(edx, kQuietNaNHighBitsMask << 1);
-      if (cc_ == equal) {
-        STATIC_ASSERT(EQUAL != 1);
-        __ setcc(above_equal, eax);
-        __ ret(0);
-      } else {
-        Label nan;
-        __ j(above_equal, &nan, Label::kNear);
-        __ Set(eax, Immediate(Smi::FromInt(EQUAL)));
-        __ ret(0);
-        __ bind(&nan);
-        __ Set(eax, Immediate(Smi::FromInt(NegativeComparisonResult(cc_))));
-        __ ret(0);
-      }
+      __ bind(&nan);
+      __ Set(eax, Immediate(Smi::FromInt(NegativeComparisonResult(cc))));
+      __ ret(0);
     }
 
     __ bind(&not_identical);
@@ -4416,7 +4375,7 @@ void CompareStub::Generate(MacroAssembler* masm) {
 
   // Strict equality can quickly decide whether objects are equal.
   // Non-strict object equality is slower, so it is handled later in the stub.
-  if (cc_ == equal && strict_) {
+  if (cc == equal && strict()) {
     Label slow;  // Fallthrough label.
     Label not_smis;
     // If we're doing a strict equality comparison, we don't have to do
@@ -4487,70 +4446,68 @@ void CompareStub::Generate(MacroAssembler* masm) {
   }
 
   // Generate the number comparison code.
-  if (include_number_compare_) {
-    Label non_number_comparison;
-    Label unordered;
-    if (CpuFeatures::IsSupported(SSE2)) {
-      CpuFeatures::Scope use_sse2(SSE2);
-      CpuFeatures::Scope use_cmov(CMOV);
-
-      FloatingPointHelper::LoadSSE2Operands(masm, &non_number_comparison);
-      __ ucomisd(xmm0, xmm1);
+  Label non_number_comparison;
+  Label unordered;
+  if (CpuFeatures::IsSupported(SSE2)) {
+    CpuFeatures::Scope use_sse2(SSE2);
+    CpuFeatures::Scope use_cmov(CMOV);
 
-      // Don't base result on EFLAGS when a NaN is involved.
-      __ j(parity_even, &unordered, Label::kNear);
-      // Return a result of -1, 0, or 1, based on EFLAGS.
-      __ mov(eax, 0);  // equal
-      __ mov(ecx, Immediate(Smi::FromInt(1)));
-      __ cmov(above, eax, ecx);
-      __ mov(ecx, Immediate(Smi::FromInt(-1)));
-      __ cmov(below, eax, ecx);
-      __ ret(0);
-    } else {
-      FloatingPointHelper::CheckFloatOperands(
-          masm, &non_number_comparison, ebx);
-      FloatingPointHelper::LoadFloatOperand(masm, eax);
-      FloatingPointHelper::LoadFloatOperand(masm, edx);
-      __ FCmp();
+    FloatingPointHelper::LoadSSE2Operands(masm, &non_number_comparison);
+    __ ucomisd(xmm0, xmm1);
 
-      // Don't base result on EFLAGS when a NaN is involved.
-      __ j(parity_even, &unordered, Label::kNear);
+    // Don't base result on EFLAGS when a NaN is involved.
+    __ j(parity_even, &unordered, Label::kNear);
+    // Return a result of -1, 0, or 1, based on EFLAGS.
+    __ mov(eax, 0);  // equal
+    __ mov(ecx, Immediate(Smi::FromInt(1)));
+    __ cmov(above, eax, ecx);
+    __ mov(ecx, Immediate(Smi::FromInt(-1)));
+    __ cmov(below, eax, ecx);
+    __ ret(0);
+  } else {
+    FloatingPointHelper::CheckFloatOperands(
+        masm, &non_number_comparison, ebx);
+    FloatingPointHelper::LoadFloatOperand(masm, eax);
+    FloatingPointHelper::LoadFloatOperand(masm, edx);
+    __ FCmp();
 
-      Label below_label, above_label;
-      // Return a result of -1, 0, or 1, based on EFLAGS.
-      __ j(below, &below_label, Label::kNear);
-      __ j(above, &above_label, Label::kNear);
+    // Don't base result on EFLAGS when a NaN is involved.
+    __ j(parity_even, &unordered, Label::kNear);
 
-      __ Set(eax, Immediate(0));
-      __ ret(0);
+    Label below_label, above_label;
+    // Return a result of -1, 0, or 1, based on EFLAGS.
+    __ j(below, &below_label, Label::kNear);
+    __ j(above, &above_label, Label::kNear);
 
-      __ bind(&below_label);
-      __ mov(eax, Immediate(Smi::FromInt(-1)));
-      __ ret(0);
+    __ Set(eax, Immediate(0));
+    __ ret(0);
 
-      __ bind(&above_label);
-      __ mov(eax, Immediate(Smi::FromInt(1)));
-      __ ret(0);
-    }
+    __ bind(&below_label);
+    __ mov(eax, Immediate(Smi::FromInt(-1)));
+    __ ret(0);
 
-    // If one of the numbers was NaN, then the result is always false.
-    // The cc is never not-equal.
-    __ bind(&unordered);
-    ASSERT(cc_ != not_equal);
-    if (cc_ == less || cc_ == less_equal) {
-      __ mov(eax, Immediate(Smi::FromInt(1)));
-    } else {
-      __ mov(eax, Immediate(Smi::FromInt(-1)));
-    }
+    __ bind(&above_label);
+    __ mov(eax, Immediate(Smi::FromInt(1)));
     __ ret(0);
+  }
 
-    // The number comparison code did not provide a valid result.
-    __ bind(&non_number_comparison);
+  // If one of the numbers was NaN, then the result is always false.
+  // The cc is never not-equal.
+  __ bind(&unordered);
+  ASSERT(cc != not_equal);
+  if (cc == less || cc == less_equal) {
+    __ mov(eax, Immediate(Smi::FromInt(1)));
+  } else {
+    __ mov(eax, Immediate(Smi::FromInt(-1)));
   }
+  __ ret(0);
+
+  // The number comparison code did not provide a valid result.
+  __ bind(&non_number_comparison);
 
   // Fast negative check for symbol-to-symbol equality.
   Label check_for_strings;
-  if (cc_ == equal) {
+  if (cc == equal) {
     BranchIfNonSymbol(masm, &check_for_strings, eax, ecx);
     BranchIfNonSymbol(masm, &check_for_strings, edx, ecx);
 
@@ -4566,7 +4523,7 @@ void CompareStub::Generate(MacroAssembler* masm) {
                                          &check_unequal_objects);
 
   // Inline comparison of ASCII strings.
-  if (cc_ == equal) {
+  if (cc == equal) {
     StringCompareStub::GenerateFlatAsciiStringEquals(masm,
                                                      edx,
                                                      eax,
@@ -4585,7 +4542,7 @@ void CompareStub::Generate(MacroAssembler* masm) {
 #endif
 
   __ bind(&check_unequal_objects);
-  if (cc_ == equal && !strict_) {
+  if (cc == equal && !strict()) {
     // Non-strict equality.  Objects are unequal if
     // they are both JSObjects and not undetectable,
     // and their pointers are different.
@@ -4629,11 +4586,11 @@ void CompareStub::Generate(MacroAssembler* masm) {
 
   // Figure out which native to call and setup the arguments.
   Builtins::JavaScript builtin;
-  if (cc_ == equal) {
-    builtin = strict_ ? Builtins::STRICT_EQUALS : Builtins::EQUALS;
+  if (cc == equal) {
+    builtin = strict() ? Builtins::STRICT_EQUALS : Builtins::EQUALS;
   } else {
     builtin = Builtins::COMPARE;
-    __ push(Immediate(Smi::FromInt(NegativeComparisonResult(cc_))));
+    __ push(Immediate(Smi::FromInt(NegativeComparisonResult(cc))));
   }
 
   // Restore return address on the stack.
@@ -4642,19 +4599,9 @@ void CompareStub::Generate(MacroAssembler* masm) {
   // Call the native; it returns -1 (less), 0 (equal), or 1 (greater)
   // tagged as a small integer.
   __ InvokeBuiltin(builtin, JUMP_FUNCTION);
-}
 
-
-void CompareStub::BranchIfNonSymbol(MacroAssembler* masm,
-                                    Label* label,
-                                    Register object,
-                                    Register scratch) {
-  __ JumpIfSmi(object, label);
-  __ mov(scratch, FieldOperand(object, HeapObject::kMapOffset));
-  __ movzx_b(scratch, FieldOperand(scratch, Map::kInstanceTypeOffset));
-  __ and_(scratch, kIsSymbolMask | kIsNotStringMask);
-  __ cmp(scratch, kSymbolTag | kStringTag);
-  __ j(not_equal, label);
+  __ bind(&miss);
+  GenerateMiss(masm);
 }
 
 
@@ -5399,44 +5346,6 @@ Register InstanceofStub::left() { return eax; }
 Register InstanceofStub::right() { return edx; }
 
 
-int CompareStub::MinorKey() {
-  // Encode the three parameters in a unique 16 bit value. To avoid duplicate
-  // stubs the never NaN NaN condition is only taken into account if the
-  // condition is equals.
-  ASSERT(static_cast<unsigned>(cc_) < (1 << 12));
-  ASSERT(lhs_.is(no_reg) && rhs_.is(no_reg));
-  return ConditionField::encode(static_cast<unsigned>(cc_))
-         | RegisterField::encode(false)   // lhs_ and rhs_ are not used
-         | StrictField::encode(strict_)
-         | NeverNanNanField::encode(cc_ == equal ? never_nan_nan_ : false)
-         | IncludeNumberCompareField::encode(include_number_compare_)
-         | IncludeSmiCompareField::encode(include_smi_compare_);
-}
-
-
-// Unfortunately you have to run without snapshots to see most of these
-// names in the profile since most compare stubs end up in the snapshot.
-void CompareStub::PrintName(StringStream* stream) {
-  ASSERT(lhs_.is(no_reg) && rhs_.is(no_reg));
-  const char* cc_name;
-  switch (cc_) {
-    case less: cc_name = "LT"; break;
-    case greater: cc_name = "GT"; break;
-    case less_equal: cc_name = "LE"; break;
-    case greater_equal: cc_name = "GE"; break;
-    case equal: cc_name = "EQ"; break;
-    case not_equal: cc_name = "NE"; break;
-    default: cc_name = "UnknownCondition"; break;
-  }
-  bool is_equality = cc_ == equal || cc_ == not_equal;
-  stream->Add("CompareStub_%s", cc_name);
-  if (strict_ && is_equality) stream->Add("_STRICT");
-  if (never_nan_nan_ && is_equality) stream->Add("_NO_NAN");
-  if (!include_number_compare_) stream->Add("_NO_NUMBER");
-  if (!include_smi_compare_) stream->Add("_NO_SMI");
-}
-
-
 // -------------------------------------------------------------------------
 // StringCharCodeAtGenerator
 
@@ -5671,8 +5580,8 @@ void StringAddStub::Generate(MacroAssembler* masm) {
   __ JumpIfNotBothSequentialAsciiStrings(eax, edx, ebx, ecx, &call_runtime);
 
   // Get the two characters forming the new string.
-  __ movzx_b(ebx, FieldOperand(eax, SeqAsciiString::kHeaderSize));
-  __ movzx_b(ecx, FieldOperand(edx, SeqAsciiString::kHeaderSize));
+  __ movzx_b(ebx, FieldOperand(eax, SeqOneByteString::kHeaderSize));
+  __ movzx_b(ecx, FieldOperand(edx, SeqOneByteString::kHeaderSize));
 
   // Try to lookup two character string in symbol table. If it is not found
   // just allocate a new one.
@@ -5689,8 +5598,8 @@ void StringAddStub::Generate(MacroAssembler* masm) {
   __ mov(eax, Operand(esp, 2 * kPointerSize));  // First argument.
   __ mov(edx, Operand(esp, 1 * kPointerSize));  // Second argument.
   // Get the two characters forming the new string.
-  __ movzx_b(ebx, FieldOperand(eax, SeqAsciiString::kHeaderSize));
-  __ movzx_b(ecx, FieldOperand(edx, SeqAsciiString::kHeaderSize));
+  __ movzx_b(ebx, FieldOperand(eax, SeqOneByteString::kHeaderSize));
+  __ movzx_b(ecx, FieldOperand(edx, SeqOneByteString::kHeaderSize));
   __ bind(&make_two_character_string_no_reload);
   __ IncrementCounter(counters->string_add_make_two_char(), 1);
   __ AllocateAsciiString(eax, 2, edi, edx, &call_runtime);
@@ -5698,7 +5607,7 @@ void StringAddStub::Generate(MacroAssembler* masm) {
   __ shl(ecx, kBitsPerByte);
   __ or_(ebx, ecx);
   // Set the characters in the new string.
-  __ mov_w(FieldOperand(eax, SeqAsciiString::kHeaderSize), ebx);
+  __ mov_w(FieldOperand(eax, SeqOneByteString::kHeaderSize), ebx);
   __ IncrementCounter(counters->string_add_native(), 1);
   __ ret(2 * kPointerSize);
 
@@ -5715,7 +5624,7 @@ void StringAddStub::Generate(MacroAssembler* masm) {
   __ mov(edi, FieldOperand(edx, HeapObject::kMapOffset));
   __ movzx_b(edi, FieldOperand(edi, Map::kInstanceTypeOffset));
   __ and_(ecx, edi);
-  STATIC_ASSERT((kStringEncodingMask & kAsciiStringTag) != 0);
+  STATIC_ASSERT((kStringEncodingMask & kOneByteStringTag) != 0);
   STATIC_ASSERT((kStringEncodingMask & kTwoByteStringTag) == 0);
   __ test(ecx, Immediate(kStringEncodingMask));
   __ j(zero, &non_ascii);
@@ -5724,7 +5633,7 @@ void StringAddStub::Generate(MacroAssembler* masm) {
   __ AllocateAsciiConsString(ecx, edi, no_reg, &call_runtime);
   __ bind(&allocated);
   // Fill the fields of the cons string.
-  if (FLAG_debug_code) __ AbortIfNotSmi(ebx);
+  __ AssertSmi(ebx);
   __ mov(FieldOperand(ecx, ConsString::kLengthOffset), ebx);
   __ mov(FieldOperand(ecx, ConsString::kHashFieldOffset),
          Immediate(String::kEmptyHashField));
@@ -5740,13 +5649,6 @@ void StringAddStub::Generate(MacroAssembler* masm) {
   // edi: second instance type.
   __ test(ecx, Immediate(kAsciiDataHintMask));
   __ j(not_zero, &ascii_data);
-  __ mov(ecx, FieldOperand(eax, HeapObject::kMapOffset));
-  __ movzx_b(ecx, FieldOperand(ecx, Map::kInstanceTypeOffset));
-  __ xor_(edi, ecx);
-  STATIC_ASSERT(kAsciiStringTag != 0 && kAsciiDataHintTag != 0);
-  __ and_(edi, kAsciiStringTag | kAsciiDataHintTag);
-  __ cmp(edi, kAsciiStringTag | kAsciiDataHintTag);
-  __ j(equal, &ascii_data);
   // Allocate a two byte cons string.
   __ AllocateTwoByteConsString(ecx, edi, no_reg, &call_runtime);
   __ jmp(&allocated);
@@ -5772,10 +5674,10 @@ void StringAddStub::Generate(MacroAssembler* masm) {
   __ test_b(ecx, kShortExternalStringMask);
   __ j(not_zero, &call_runtime);
   __ mov(eax, FieldOperand(eax, ExternalString::kResourceDataOffset));
-  STATIC_ASSERT(SeqAsciiString::kHeaderSize == SeqTwoByteString::kHeaderSize);
+  STATIC_ASSERT(SeqOneByteString::kHeaderSize == SeqTwoByteString::kHeaderSize);
   __ jmp(&first_prepared, Label::kNear);
   __ bind(&first_is_sequential);
-  __ add(eax, Immediate(SeqAsciiString::kHeaderSize - kHeapObjectTag));
+  __ add(eax, Immediate(SeqOneByteString::kHeaderSize - kHeapObjectTag));
   __ bind(&first_prepared);
 
   __ mov(edi, FieldOperand(edx, HeapObject::kMapOffset));
@@ -5793,10 +5695,10 @@ void StringAddStub::Generate(MacroAssembler* masm) {
   __ test_b(edi, kShortExternalStringMask);
   __ j(not_zero, &call_runtime);
   __ mov(edx, FieldOperand(edx, ExternalString::kResourceDataOffset));
-  STATIC_ASSERT(SeqAsciiString::kHeaderSize == SeqTwoByteString::kHeaderSize);
+  STATIC_ASSERT(SeqOneByteString::kHeaderSize == SeqTwoByteString::kHeaderSize);
   __ jmp(&second_prepared, Label::kNear);
   __ bind(&second_is_sequential);
-  __ add(edx, Immediate(SeqAsciiString::kHeaderSize - kHeapObjectTag));
+  __ add(edx, Immediate(SeqOneByteString::kHeaderSize - kHeapObjectTag));
   __ bind(&second_prepared);
 
   // Push the addresses of both strings' first characters onto the stack.
@@ -5817,7 +5719,7 @@ void StringAddStub::Generate(MacroAssembler* masm) {
   // eax: result string
   __ mov(ecx, eax);
   // Locate first character of result.
-  __ add(ecx, Immediate(SeqAsciiString::kHeaderSize - kHeapObjectTag));
+  __ add(ecx, Immediate(SeqOneByteString::kHeaderSize - kHeapObjectTag));
   // Load first argument's length and first character location.  Account for
   // values currently on the stack when fetching arguments from it.
   __ mov(edx, Operand(esp, 4 * kPointerSize));
@@ -6127,7 +6029,7 @@ void StringHelper::GenerateTwoCharacterSymbolTableProbe(MacroAssembler* masm,
         temp, temp, &next_probe_pop_mask[i]);
 
     // Check if the two characters match.
-    __ mov(temp, FieldOperand(candidate, SeqAsciiString::kHeaderSize));
+    __ mov(temp, FieldOperand(candidate, SeqOneByteString::kHeaderSize));
     __ and_(temp, 0x0000ffff);
     __ cmp(chars, temp);
     __ j(equal, &found_in_symbol_table);
@@ -6316,7 +6218,7 @@ void SubStringStub::Generate(MacroAssembler* masm) {
     // string's encoding is wrong because we always have to recheck encoding of
     // the newly created string's parent anyways due to externalized strings.
     Label two_byte_slice, set_slice_header;
-    STATIC_ASSERT((kStringEncodingMask & kAsciiStringTag) != 0);
+    STATIC_ASSERT((kStringEncodingMask & kOneByteStringTag) != 0);
     STATIC_ASSERT((kStringEncodingMask & kTwoByteStringTag) == 0);
     __ test(ebx, Immediate(kStringEncodingMask));
     __ j(zero, &two_byte_slice, Label::kNear);
@@ -6355,7 +6257,7 @@ void SubStringStub::Generate(MacroAssembler* masm) {
   __ j(not_zero, &runtime);
   __ mov(edi, FieldOperand(edi, ExternalString::kResourceDataOffset));
   // Move the pointer so that offset-wise, it looks like a sequential string.
-  STATIC_ASSERT(SeqTwoByteString::kHeaderSize == SeqAsciiString::kHeaderSize);
+  STATIC_ASSERT(SeqTwoByteString::kHeaderSize == SeqOneByteString::kHeaderSize);
   __ sub(edi, Immediate(SeqTwoByteString::kHeaderSize - kHeapObjectTag));
 
   __ bind(&sequential_string);
@@ -6363,7 +6265,7 @@ void SubStringStub::Generate(MacroAssembler* masm) {
   __ push(edx);
   __ push(edi);
   __ SmiUntag(ecx);
-  STATIC_ASSERT((kAsciiStringTag & kStringEncodingMask) != 0);
+  STATIC_ASSERT((kOneByteStringTag & kStringEncodingMask) != 0);
   __ test_b(ebx, kStringEncodingMask);
   __ j(zero, &two_byte_sequential);
 
@@ -6375,12 +6277,12 @@ void SubStringStub::Generate(MacroAssembler* masm) {
   __ mov(edx, esi);  // esi used by following code.
   // Locate first character of result.
   __ mov(edi, eax);
-  __ add(edi, Immediate(SeqAsciiString::kHeaderSize - kHeapObjectTag));
+  __ add(edi, Immediate(SeqOneByteString::kHeaderSize - kHeapObjectTag));
   // Load string argument and locate character of sub string start.
   __ pop(esi);
   __ pop(ebx);
   __ SmiUntag(ebx);
-  __ lea(esi, FieldOperand(esi, ebx, times_1, SeqAsciiString::kHeaderSize));
+  __ lea(esi, FieldOperand(esi, ebx, times_1, SeqOneByteString::kHeaderSize));
 
   // eax: result string
   // ecx: result length
@@ -6541,9 +6443,9 @@ void StringCompareStub::GenerateAsciiCharsCompareLoop(
   // doesn't need an additional compare.
   __ SmiUntag(length);
   __ lea(left,
-         FieldOperand(left, length, times_1, SeqAsciiString::kHeaderSize));
+         FieldOperand(left, length, times_1, SeqOneByteString::kHeaderSize));
   __ lea(right,
-         FieldOperand(right, length, times_1, SeqAsciiString::kHeaderSize));
+         FieldOperand(right, length, times_1, SeqOneByteString::kHeaderSize));
   __ neg(length);
   Register index = length;  // index = -length;
 
@@ -6598,7 +6500,7 @@ void StringCompareStub::Generate(MacroAssembler* masm) {
 
 
 void ICCompareStub::GenerateSmis(MacroAssembler* masm) {
-  ASSERT(state_ == CompareIC::SMIS);
+  ASSERT(state_ == CompareIC::SMI);
   Label miss;
   __ mov(ecx, edx);
   __ or_(ecx, eax);
@@ -6624,31 +6526,52 @@ void ICCompareStub::GenerateSmis(MacroAssembler* masm) {
 
 
 void ICCompareStub::GenerateHeapNumbers(MacroAssembler* masm) {
-  ASSERT(state_ == CompareIC::HEAP_NUMBERS);
+  ASSERT(state_ == CompareIC::HEAP_NUMBER);
 
   Label generic_stub;
   Label unordered, maybe_undefined1, maybe_undefined2;
   Label miss;
-  __ mov(ecx, edx);
-  __ and_(ecx, eax);
-  __ JumpIfSmi(ecx, &generic_stub, Label::kNear);
 
-  __ CmpObjectType(eax, HEAP_NUMBER_TYPE, ecx);
-  __ j(not_equal, &maybe_undefined1, Label::kNear);
-  __ CmpObjectType(edx, HEAP_NUMBER_TYPE, ecx);
-  __ j(not_equal, &maybe_undefined2, Label::kNear);
+  if (left_ == CompareIC::SMI) {
+    __ JumpIfNotSmi(edx, &miss);
+  }
+  if (right_ == CompareIC::SMI) {
+    __ JumpIfNotSmi(eax, &miss);
+  }
 
   // Inlining the double comparison and falling back to the general compare
-  // stub if NaN is involved or SS2 or CMOV is unsupported.
+  // stub if NaN is involved or SSE2 or CMOV is unsupported.
   if (CpuFeatures::IsSupported(SSE2) && CpuFeatures::IsSupported(CMOV)) {
     CpuFeatures::Scope scope1(SSE2);
     CpuFeatures::Scope scope2(CMOV);
 
-    // Load left and right operand
-    __ movdbl(xmm0, FieldOperand(edx, HeapNumber::kValueOffset));
+    // Load left and right operand.
+    Label done, left, left_smi, right_smi;
+    __ JumpIfSmi(eax, &right_smi, Label::kNear);
+    __ cmp(FieldOperand(eax, HeapObject::kMapOffset),
+           masm->isolate()->factory()->heap_number_map());
+    __ j(not_equal, &maybe_undefined1, Label::kNear);
     __ movdbl(xmm1, FieldOperand(eax, HeapNumber::kValueOffset));
+    __ jmp(&left, Label::kNear);
+    __ bind(&right_smi);
+    __ mov(ecx, eax);  // Can't clobber eax because we can still jump away.
+    __ SmiUntag(ecx);
+    __ cvtsi2sd(xmm1, ecx);
+
+    __ bind(&left);
+    __ JumpIfSmi(edx, &left_smi, Label::kNear);
+    __ cmp(FieldOperand(edx, HeapObject::kMapOffset),
+           masm->isolate()->factory()->heap_number_map());
+    __ j(not_equal, &maybe_undefined2, Label::kNear);
+    __ movdbl(xmm0, FieldOperand(edx, HeapNumber::kValueOffset));
+    __ jmp(&done);
+    __ bind(&left_smi);
+    __ mov(ecx, edx);  // Can't clobber edx because we can still jump away.
+    __ SmiUntag(ecx);
+    __ cvtsi2sd(xmm0, ecx);
 
-    // Compare operands
+    __ bind(&done);
+    // Compare operands.
     __ ucomisd(xmm0, xmm1);
 
     // Don't base result on EFLAGS when a NaN is involved.
@@ -6662,17 +6585,30 @@ void ICCompareStub::GenerateHeapNumbers(MacroAssembler* masm) {
     __ mov(ecx, Immediate(Smi::FromInt(-1)));
     __ cmov(below, eax, ecx);
     __ ret(0);
+  } else {
+    __ mov(ecx, edx);
+    __ and_(ecx, eax);
+    __ JumpIfSmi(ecx, &generic_stub, Label::kNear);
+
+    __ cmp(FieldOperand(eax, HeapObject::kMapOffset),
+           masm->isolate()->factory()->heap_number_map());
+    __ j(not_equal, &maybe_undefined1, Label::kNear);
+    __ cmp(FieldOperand(edx, HeapObject::kMapOffset),
+           masm->isolate()->factory()->heap_number_map());
+    __ j(not_equal, &maybe_undefined2, Label::kNear);
   }
 
   __ bind(&unordered);
-  CompareStub stub(GetCondition(), strict(), NO_COMPARE_FLAGS);
   __ bind(&generic_stub);
+  ICCompareStub stub(op_, CompareIC::GENERIC, CompareIC::GENERIC,
+                     CompareIC::GENERIC);
   __ jmp(stub.GetCode(), RelocInfo::CODE_TARGET);
 
   __ bind(&maybe_undefined1);
   if (Token::IsOrderedRelationalCompareOp(op_)) {
     __ cmp(eax, Immediate(masm->isolate()->factory()->undefined_value()));
     __ j(not_equal, &miss);
+    __ JumpIfSmi(edx, &unordered);
     __ CmpObjectType(edx, HEAP_NUMBER_TYPE, ecx);
     __ j(not_equal, &maybe_undefined2, Label::kNear);
     __ jmp(&unordered);
@@ -6690,7 +6626,7 @@ void ICCompareStub::GenerateHeapNumbers(MacroAssembler* masm) {
 
 
 void ICCompareStub::GenerateSymbols(MacroAssembler* masm) {
-  ASSERT(state_ == CompareIC::SYMBOLS);
+  ASSERT(state_ == CompareIC::SYMBOL);
   ASSERT(GetCondition() == equal);
 
   // Registers containing left and right operands respectively.
@@ -6735,7 +6671,7 @@ void ICCompareStub::GenerateSymbols(MacroAssembler* masm) {
 
 
 void ICCompareStub::GenerateStrings(MacroAssembler* masm) {
-  ASSERT(state_ == CompareIC::STRINGS);
+  ASSERT(state_ == CompareIC::STRING);
   Label miss;
 
   bool equality = Token::IsEqualityOp(op_);
@@ -6824,7 +6760,7 @@ void ICCompareStub::GenerateStrings(MacroAssembler* masm) {
 
 
 void ICCompareStub::GenerateObjects(MacroAssembler* masm) {
-  ASSERT(state_ == CompareIC::OBJECTS);
+  ASSERT(state_ == CompareIC::OBJECT);
   Label miss;
   __ mov(ecx, edx);
   __ and_(ecx, eax);
@@ -6973,8 +6909,7 @@ void StringDictionaryLookupStub::GeneratePositiveLookup(MacroAssembler* masm,
   ASSERT(!name.is(r0));
   ASSERT(!name.is(r1));
 
-  // Assert that name contains a string.
-  if (FLAG_debug_code) __ AbortIfNotString(name);
+  __ AssertString(name);
 
   __ mov(r1, FieldOperand(elements, kCapacityOffset));
   __ shr(r1, kSmiTagSize);  // convert smi to int
@@ -7198,6 +7133,11 @@ void RecordWriteStub::GenerateFixedRegStubsAheadOfTime() {
 }
 
 
+bool CodeStub::CanUseFPRegisters() {
+  return CpuFeatures::IsSupported(SSE2);
+}
+
+
 // Takes the input in 3 registers: address_ value_ and object_.  A pointer to
 // the value has just been written into the object, now this stub makes sure
 // we keep the GC informed.  The word in the object where the value has been
@@ -7285,13 +7225,7 @@ void RecordWriteStub::InformIncrementalMarker(MacroAssembler* masm, Mode mode) {
   int argument_count = 3;
   __ PrepareCallCFunction(argument_count, regs_.scratch0());
   __ mov(Operand(esp, 0 * kPointerSize), regs_.object());
-  if (mode == INCREMENTAL_COMPACTION) {
-    __ mov(Operand(esp, 1 * kPointerSize), regs_.address());  // Slot.
-  } else {
-    ASSERT(mode == INCREMENTAL);
-    __ mov(regs_.scratch0(), Operand(regs_.address(), 0));
-    __ mov(Operand(esp, 1 * kPointerSize), regs_.scratch0());  // Value.
-  }
+  __ mov(Operand(esp, 1 * kPointerSize), regs_.address());  // Slot.
   __ mov(Operand(esp, 2 * kPointerSize),
          Immediate(ExternalReference::isolate_address()));
 
@@ -7318,6 +7252,17 @@ void RecordWriteStub::CheckNeedsToInformIncrementalMarker(
     Mode mode) {
   Label object_is_black, need_incremental, need_incremental_pop_object;
 
+  __ mov(regs_.scratch0(), Immediate(~Page::kPageAlignmentMask));
+  __ and_(regs_.scratch0(), regs_.object());
+  __ mov(regs_.scratch1(),
+         Operand(regs_.scratch0(),
+                 MemoryChunk::kWriteBarrierCounterOffset));
+  __ sub(regs_.scratch1(), Immediate(1));
+  __ mov(Operand(regs_.scratch0(),
+                 MemoryChunk::kWriteBarrierCounterOffset),
+         regs_.scratch1());
+  __ j(negative, &need_incremental);
+
   // Let's look at the color of the object:  If it is not black we don't have
   // to inform the incremental marker.
   __ JumpIfBlack(regs_.object(),
diff --git a/deps/v8/src/ia32/code-stubs-ia32.h b/deps/v8/src/ia32/code-stubs-ia32.h
index 803a711de9..29c16e1304 100644
--- a/deps/v8/src/ia32/code-stubs-ia32.h
+++ b/deps/v8/src/ia32/code-stubs-ia32.h
@@ -154,96 +154,6 @@ class UnaryOpStub: public CodeStub {
 };
 
 
-class BinaryOpStub: public CodeStub {
- public:
-  BinaryOpStub(Token::Value op, OverwriteMode mode)
-      : op_(op),
-        mode_(mode),
-        operands_type_(BinaryOpIC::UNINITIALIZED),
-        result_type_(BinaryOpIC::UNINITIALIZED) {
-    use_sse3_ = CpuFeatures::IsSupported(SSE3);
-    ASSERT(OpBits::is_valid(Token::NUM_TOKENS));
-  }
-
-  BinaryOpStub(
-      int key,
-      BinaryOpIC::TypeInfo operands_type,
-      BinaryOpIC::TypeInfo result_type = BinaryOpIC::UNINITIALIZED)
-      : op_(OpBits::decode(key)),
-        mode_(ModeBits::decode(key)),
-        use_sse3_(SSE3Bits::decode(key)),
-        operands_type_(operands_type),
-        result_type_(result_type) { }
-
- private:
-  enum SmiCodeGenerateHeapNumberResults {
-    ALLOW_HEAPNUMBER_RESULTS,
-    NO_HEAPNUMBER_RESULTS
-  };
-
-  Token::Value op_;
-  OverwriteMode mode_;
-  bool use_sse3_;
-
-  // Operand type information determined at runtime.
-  BinaryOpIC::TypeInfo operands_type_;
-  BinaryOpIC::TypeInfo result_type_;
-
-  virtual void PrintName(StringStream* stream);
-
-  // Minor key encoding in 16 bits RRRTTTSOOOOOOOMM.
-  class ModeBits: public BitField<OverwriteMode, 0, 2> {};
-  class OpBits: public BitField<Token::Value, 2, 7> {};
-  class SSE3Bits: public BitField<bool, 9, 1> {};
-  class OperandTypeInfoBits: public BitField<BinaryOpIC::TypeInfo, 10, 3> {};
-  class ResultTypeInfoBits: public BitField<BinaryOpIC::TypeInfo, 13, 3> {};
-
-  Major MajorKey() { return BinaryOp; }
-  int MinorKey() {
-    return OpBits::encode(op_)
-           | ModeBits::encode(mode_)
-           | SSE3Bits::encode(use_sse3_)
-           | OperandTypeInfoBits::encode(operands_type_)
-           | ResultTypeInfoBits::encode(result_type_);
-  }
-
-  void Generate(MacroAssembler* masm);
-  void GenerateGeneric(MacroAssembler* masm);
-  void GenerateSmiCode(MacroAssembler* masm,
-                       Label* slow,
-                       SmiCodeGenerateHeapNumberResults heapnumber_results);
-  void GenerateLoadArguments(MacroAssembler* masm);
-  void GenerateReturn(MacroAssembler* masm);
-  void GenerateUninitializedStub(MacroAssembler* masm);
-  void GenerateSmiStub(MacroAssembler* masm);
-  void GenerateInt32Stub(MacroAssembler* masm);
-  void GenerateHeapNumberStub(MacroAssembler* masm);
-  void GenerateOddballStub(MacroAssembler* masm);
-  void GenerateStringStub(MacroAssembler* masm);
-  void GenerateBothStringStub(MacroAssembler* masm);
-  void GenerateGenericStub(MacroAssembler* masm);
-  void GenerateAddStrings(MacroAssembler* masm);
-
-  void GenerateHeapResultAllocation(MacroAssembler* masm, Label* alloc_failure);
-  void GenerateRegisterArgsPush(MacroAssembler* masm);
-  void GenerateTypeTransition(MacroAssembler* masm);
-  void GenerateTypeTransitionWithSavedArgs(MacroAssembler* masm);
-
-  virtual int GetCodeKind() { return Code::BINARY_OP_IC; }
-
-  virtual InlineCacheState GetICState() {
-    return BinaryOpIC::ToState(operands_type_);
-  }
-
-  virtual void FinishCode(Handle<Code> code) {
-    code->set_binary_op_type(operands_type_);
-    code->set_binary_op_result_type(result_type_);
-  }
-
-  friend class CodeGenerator;
-};
-
-
 class StringHelper : public AllStatic {
  public:
   // Generate code for copying characters using a simple loop. This should only
diff --git a/deps/v8/src/ia32/codegen-ia32.cc b/deps/v8/src/ia32/codegen-ia32.cc
index eb6868729b..9477bf149a 100644
--- a/deps/v8/src/ia32/codegen-ia32.cc
+++ b/deps/v8/src/ia32/codegen-ia32.cc
@@ -102,6 +102,43 @@ UnaryMathFunction CreateTranscendentalFunction(TranscendentalCache::Type type) {
 }
 
 
+UnaryMathFunction CreateExpFunction() {
+  if (!CpuFeatures::IsSupported(SSE2)) return &exp;
+  if (!FLAG_fast_math) return &exp;
+  size_t actual_size;
+  byte* buffer = static_cast<byte*>(OS::Allocate(1 * KB, &actual_size, true));
+  if (buffer == NULL) return &exp;
+  ExternalReference::InitializeMathExpData();
+
+  MacroAssembler masm(NULL, buffer, static_cast<int>(actual_size));
+  // esp[1 * kPointerSize]: raw double input
+  // esp[0 * kPointerSize]: return address
+  {
+    CpuFeatures::Scope use_sse2(SSE2);
+    XMMRegister input = xmm1;
+    XMMRegister result = xmm2;
+    __ movdbl(input, Operand(esp, 1 * kPointerSize));
+    __ push(eax);
+    __ push(ebx);
+
+    MathExpGenerator::EmitMathExp(&masm, input, result, xmm0, eax, ebx);
+
+    __ pop(ebx);
+    __ pop(eax);
+    __ movdbl(Operand(esp, 1 * kPointerSize), result);
+    __ fld_d(Operand(esp, 1 * kPointerSize));
+    __ Ret();
+  }
+
+  CodeDesc desc;
+  masm.GetCode(&desc);
+
+  CPU::FlushICache(buffer, actual_size);
+  OS::ProtectCode(buffer, actual_size);
+  return FUNCTION_CAST<UnaryMathFunction>(buffer);
+}
+
+
 UnaryMathFunction CreateSqrtFunction() {
   size_t actual_size;
   // Allocate buffer in executable space.
@@ -732,7 +769,7 @@ void StringCharLoadGenerator::Generate(MacroAssembler* masm,
   // Dispatch on the encoding: ASCII or two-byte.
   Label ascii;
   __ bind(&seq_string);
-  STATIC_ASSERT((kStringEncodingMask & kAsciiStringTag) != 0);
+  STATIC_ASSERT((kStringEncodingMask & kOneByteStringTag) != 0);
   STATIC_ASSERT((kStringEncodingMask & kTwoByteStringTag) == 0);
   __ test(result, Immediate(kStringEncodingMask));
   __ j(not_zero, &ascii, Label::kNear);
@@ -751,12 +788,174 @@ void StringCharLoadGenerator::Generate(MacroAssembler* masm,
   __ movzx_b(result, FieldOperand(string,
                                   index,
                                   times_1,
-                                  SeqAsciiString::kHeaderSize));
+                                  SeqOneByteString::kHeaderSize));
+  __ bind(&done);
+}
+
+
+void SeqStringSetCharGenerator::Generate(MacroAssembler* masm,
+                                         String::Encoding encoding,
+                                         Register string,
+                                         Register index,
+                                         Register value) {
+  if (FLAG_debug_code) {
+    __ test(index, Immediate(kSmiTagMask));
+    __ Check(zero, "Non-smi index");
+    __ test(value, Immediate(kSmiTagMask));
+    __ Check(zero, "Non-smi value");
+
+    __ cmp(index, FieldOperand(string, String::kLengthOffset));
+    __ Check(less, "Index is too large");
+
+    __ cmp(index, Immediate(Smi::FromInt(0)));
+    __ Check(greater_equal, "Index is negative");
+
+    __ push(value);
+    __ mov(value, FieldOperand(string, HeapObject::kMapOffset));
+    __ movzx_b(value, FieldOperand(value, Map::kInstanceTypeOffset));
+
+    __ and_(value, Immediate(kStringRepresentationMask | kStringEncodingMask));
+    static const uint32_t one_byte_seq_type = kSeqStringTag | kOneByteStringTag;
+    static const uint32_t two_byte_seq_type = kSeqStringTag | kTwoByteStringTag;
+    __ cmp(value, Immediate(encoding == String::ONE_BYTE_ENCODING
+                                ? one_byte_seq_type : two_byte_seq_type));
+    __ Check(equal, "Unexpected string type");
+    __ pop(value);
+  }
+
+  __ SmiUntag(value);
+  STATIC_ASSERT(kSmiTagSize == 1 && kSmiTag == 0);
+  if (encoding == String::ONE_BYTE_ENCODING) {
+    __ SmiUntag(index);
+    __ mov_b(FieldOperand(string, index, times_1, SeqString::kHeaderSize),
+             value);
+  } else {
+    // No need to untag a smi for two-byte addressing.
+    __ mov_w(FieldOperand(string, index, times_1, SeqString::kHeaderSize),
+             value);
+  }
+}
+
+
+static Operand ExpConstant(int index) {
+  return Operand::StaticVariable(ExternalReference::math_exp_constants(index));
+}
+
+
+void MathExpGenerator::EmitMathExp(MacroAssembler* masm,
+                                   XMMRegister input,
+                                   XMMRegister result,
+                                   XMMRegister double_scratch,
+                                   Register temp1,
+                                   Register temp2) {
+  ASSERT(!input.is(double_scratch));
+  ASSERT(!input.is(result));
+  ASSERT(!result.is(double_scratch));
+  ASSERT(!temp1.is(temp2));
+  ASSERT(ExternalReference::math_exp_constants(0).address() != NULL);
+
+  Label done;
+
+  __ movdbl(double_scratch, ExpConstant(0));
+  __ xorpd(result, result);
+  __ ucomisd(double_scratch, input);
+  __ j(above_equal, &done);
+  __ ucomisd(input, ExpConstant(1));
+  __ movdbl(result, ExpConstant(2));
+  __ j(above_equal, &done);
+  __ movdbl(double_scratch, ExpConstant(3));
+  __ movdbl(result, ExpConstant(4));
+  __ mulsd(double_scratch, input);
+  __ addsd(double_scratch, result);
+  __ movd(temp2, double_scratch);
+  __ subsd(double_scratch, result);
+  __ movdbl(result, ExpConstant(6));
+  __ mulsd(double_scratch, ExpConstant(5));
+  __ subsd(double_scratch, input);
+  __ subsd(result, double_scratch);
+  __ movsd(input, double_scratch);
+  __ mulsd(input, double_scratch);
+  __ mulsd(result, input);
+  __ mov(temp1, temp2);
+  __ mulsd(result, ExpConstant(7));
+  __ subsd(result, double_scratch);
+  __ add(temp1, Immediate(0x1ff800));
+  __ addsd(result, ExpConstant(8));
+  __ and_(temp2, Immediate(0x7ff));
+  __ shr(temp1, 11);
+  __ shl(temp1, 20);
+  __ movd(input, temp1);
+  __ pshufd(input, input, static_cast<uint8_t>(0xe1));  // Order: 11 10 00 01
+  __ movdbl(double_scratch, Operand::StaticArray(
+      temp2, times_8, ExternalReference::math_exp_log_table()));
+  __ por(input, double_scratch);
+  __ mulsd(result, input);
   __ bind(&done);
 }
 
 #undef __
 
+static const int kNoCodeAgeSequenceLength = 5;
+
+static byte* GetNoCodeAgeSequence(uint32_t* length) {
+  static bool initialized = false;
+  static byte sequence[kNoCodeAgeSequenceLength];
+  *length = kNoCodeAgeSequenceLength;
+  if (!initialized) {
+    // The sequence of instructions that is patched out for aging code is the
+    // following boilerplate stack-building prologue that is found both in
+    // FUNCTION and OPTIMIZED_FUNCTION code:
+    CodePatcher patcher(sequence, kNoCodeAgeSequenceLength);
+    patcher.masm()->push(ebp);
+    patcher.masm()->mov(ebp, esp);
+    patcher.masm()->push(esi);
+    patcher.masm()->push(edi);
+    initialized = true;
+  }
+  return sequence;
+}
+
+
+bool Code::IsYoungSequence(byte* sequence) {
+  uint32_t young_length;
+  byte* young_sequence = GetNoCodeAgeSequence(&young_length);
+  bool result = (!memcmp(sequence, young_sequence, young_length));
+  ASSERT(result || *sequence == kCallOpcode);
+  return result;
+}
+
+
+void Code::GetCodeAgeAndParity(byte* sequence, Age* age,
+                               MarkingParity* parity) {
+  if (IsYoungSequence(sequence)) {
+    *age = kNoAge;
+    *parity = NO_MARKING_PARITY;
+  } else {
+    sequence++;  // Skip the kCallOpcode byte
+    Address target_address = sequence + *reinterpret_cast<int*>(sequence) +
+        Assembler::kCallTargetAddressOffset;
+    Code* stub = GetCodeFromTargetAddress(target_address);
+    GetCodeAgeAndParity(stub, age, parity);
+  }
+}
+
+
+void Code::PatchPlatformCodeAge(byte* sequence,
+                                Code::Age age,
+                                MarkingParity parity) {
+  uint32_t young_length;
+  byte* young_sequence = GetNoCodeAgeSequence(&young_length);
+  if (age == kNoAge) {
+    memcpy(sequence, young_sequence, young_length);
+    CPU::FlushICache(sequence, young_length);
+  } else {
+    Code* stub = GetCodeAgeStub(age, parity);
+    CodePatcher patcher(sequence, young_length);
+    patcher.masm()->call(stub->instruction_start(), RelocInfo::NONE);
+  }
+}
+
+
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_IA32
diff --git a/deps/v8/src/ia32/codegen-ia32.h b/deps/v8/src/ia32/codegen-ia32.h
index f4ab0b50f6..5137274145 100644
--- a/deps/v8/src/ia32/codegen-ia32.h
+++ b/deps/v8/src/ia32/codegen-ia32.h
@@ -88,6 +88,20 @@ class StringCharLoadGenerator : public AllStatic {
   DISALLOW_COPY_AND_ASSIGN(StringCharLoadGenerator);
 };
 
+
+class MathExpGenerator : public AllStatic {
+ public:
+  static void EmitMathExp(MacroAssembler* masm,
+                          XMMRegister input,
+                          XMMRegister result,
+                          XMMRegister double_scratch,
+                          Register temp1,
+                          Register temp2);
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(MathExpGenerator);
+};
+
 } }  // namespace v8::internal
 
 #endif  // V8_IA32_CODEGEN_IA32_H_
diff --git a/deps/v8/src/ia32/deoptimizer-ia32.cc b/deps/v8/src/ia32/deoptimizer-ia32.cc
index f50010b9d9..c9ecaccd2d 100644
--- a/deps/v8/src/ia32/deoptimizer-ia32.cc
+++ b/deps/v8/src/ia32/deoptimizer-ia32.cc
@@ -198,19 +198,7 @@ void Deoptimizer::DeoptimizeFunction(JSFunction* function) {
   // ignore all slots that might have been recorded on it.
   isolate->heap()->mark_compact_collector()->InvalidateCode(code);
 
-  // Iterate over all the functions which share the same code object
-  // and make them use unoptimized version.
-  Context* context = function->context()->native_context();
-  Object* element = context->get(Context::OPTIMIZED_FUNCTIONS_LIST);
-  SharedFunctionInfo* shared = function->shared();
-  while (!element->IsUndefined()) {
-    JSFunction* func = JSFunction::cast(element);
-    // Grab element before code replacement as ReplaceCode alters the list.
-    element = func->next_function_link();
-    if (func->code() == code) {
-      func->ReplaceCode(shared->code());
-    }
-  }
+  ReplaceCodeForRelatedFunctions(function, code);
 
   if (FLAG_trace_deopt) {
     PrintF("[forced deoptimization: ");
@@ -222,8 +210,6 @@ void Deoptimizer::DeoptimizeFunction(JSFunction* function) {
 
 static const byte kJnsInstruction = 0x79;
 static const byte kJnsOffset = 0x13;
-static const byte kJaeInstruction = 0x73;
-static const byte kJaeOffset = 0x07;
 static const byte kCallInstruction = 0xe8;
 static const byte kNopByteOne = 0x66;
 static const byte kNopByteTwo = 0x90;
@@ -236,31 +222,26 @@ void Deoptimizer::PatchStackCheckCodeAt(Code* unoptimized_code,
   Address call_target_address = pc_after - kIntSize;
   ASSERT_EQ(check_code->entry(),
             Assembler::target_address_at(call_target_address));
-  // The stack check code matches the pattern:
+  // The back edge bookkeeping code matches the pattern:
   //
-  //     cmp esp, <limit>
-  //     jae ok
+  //     sub <profiling_counter>, <delta>
+  //     jns ok
   //     call <stack guard>
   //     test eax, <loop nesting depth>
   // ok: ...
   //
   // We will patch away the branch so the code is:
   //
-  //     cmp esp, <limit>  ;; Not changed
+  //     sub <profiling_counter>, <delta>  ;; Not changed
   //     nop
   //     nop
   //     call <on-stack replacment>
   //     test eax, <loop nesting depth>
   // ok:
 
-  if (FLAG_count_based_interrupts) {
-    ASSERT_EQ(kJnsInstruction, *(call_target_address - 3));
-    ASSERT_EQ(kJnsOffset,      *(call_target_address - 2));
-  } else {
-    ASSERT_EQ(kJaeInstruction, *(call_target_address - 3));
-    ASSERT_EQ(kJaeOffset,      *(call_target_address - 2));
-  }
-  ASSERT_EQ(kCallInstruction,  *(call_target_address - 1));
+  ASSERT_EQ(kJnsInstruction,  *(call_target_address - 3));
+  ASSERT_EQ(kJnsOffset,       *(call_target_address - 2));
+  ASSERT_EQ(kCallInstruction, *(call_target_address - 1));
   *(call_target_address - 3) = kNopByteOne;
   *(call_target_address - 2) = kNopByteTwo;
   Assembler::set_target_address_at(call_target_address,
@@ -284,13 +265,8 @@ void Deoptimizer::RevertStackCheckCodeAt(Code* unoptimized_code,
   ASSERT_EQ(kNopByteOne,      *(call_target_address - 3));
   ASSERT_EQ(kNopByteTwo,      *(call_target_address - 2));
   ASSERT_EQ(kCallInstruction, *(call_target_address - 1));
-  if (FLAG_count_based_interrupts) {
-    *(call_target_address - 3) = kJnsInstruction;
-    *(call_target_address - 2) = kJnsOffset;
-  } else {
-    *(call_target_address - 3) = kJaeInstruction;
-    *(call_target_address - 2) = kJaeOffset;
-  }
+  *(call_target_address - 3) = kJnsInstruction;
+  *(call_target_address - 2) = kJnsOffset;
   Assembler::set_target_address_at(call_target_address,
                                    check_code->entry());
 
diff --git a/deps/v8/src/ia32/disasm-ia32.cc b/deps/v8/src/ia32/disasm-ia32.cc
index 008fdde7ea..1ac3b2eb23 100644
--- a/deps/v8/src/ia32/disasm-ia32.cc
+++ b/deps/v8/src/ia32/disasm-ia32.cc
@@ -869,6 +869,7 @@ static const char* F0Mnem(byte f0byte) {
     case 0xAF: return "imul";
     case 0xA5: return "shld";
     case 0xAD: return "shrd";
+    case 0xAC: return "shrd";  // 3-operand version.
     case 0xAB: return "bts";
     default: return NULL;
   }
@@ -1305,6 +1306,14 @@ int DisassemblerIA32::InstructionDecode(v8::internal::Vector<char> out_buffer,
                            NameOfXMMRegister(rm),
                            static_cast<int>(imm8));
             data += 2;
+          } else if (*data == 0x76) {
+            data++;
+            int mod, regop, rm;
+            get_modrm(*data, &mod, &regop, &rm);
+            AppendToBuffer("pcmpeqd %s,%s",
+                           NameOfXMMRegister(regop),
+                           NameOfXMMRegister(rm));
+            data++;
           } else if (*data == 0x90) {
             data++;
             AppendToBuffer("nop");  // 2 byte nop.
diff --git a/deps/v8/src/ia32/full-codegen-ia32.cc b/deps/v8/src/ia32/full-codegen-ia32.cc
index 7fb7cc3215..50713b5c14 100644
--- a/deps/v8/src/ia32/full-codegen-ia32.cc
+++ b/deps/v8/src/ia32/full-codegen-ia32.cc
@@ -119,7 +119,7 @@ void FullCodeGenerator::Generate() {
   handler_table_ =
       isolate()->factory()->NewFixedArray(function()->handler_count(), TENURED);
   profiling_counter_ = isolate()->factory()->NewJSGlobalPropertyCell(
-      Handle<Smi>(Smi::FromInt(FLAG_interrupt_budget)));
+      Handle<Smi>(Smi::FromInt(FLAG_interrupt_budget), isolate()));
   SetFunctionPosition(function());
   Comment cmnt(masm_, "[ function compiled by full code generator");
 
@@ -156,6 +156,7 @@ void FullCodeGenerator::Generate() {
   // the frame (that is done below).
   FrameScope frame_scope(masm_, StackFrame::MANUAL);
 
+  info->set_prologue_offset(masm_->pc_offset());
   __ push(ebp);  // Caller's frame pointer.
   __ mov(ebp, esp);
   __ push(esi);  // Callee's context.
@@ -328,39 +329,27 @@ void FullCodeGenerator::EmitProfilingCounterReset() {
 }
 
 
-void FullCodeGenerator::EmitStackCheck(IterationStatement* stmt,
-                                       Label* back_edge_target) {
-  Comment cmnt(masm_, "[ Stack check");
+void FullCodeGenerator::EmitBackEdgeBookkeeping(IterationStatement* stmt,
+                                                Label* back_edge_target) {
+  Comment cmnt(masm_, "[ Back edge bookkeeping");
   Label ok;
 
-  if (FLAG_count_based_interrupts) {
-    int weight = 1;
-    if (FLAG_weighted_back_edges) {
-      ASSERT(back_edge_target->is_bound());
-      int distance = masm_->SizeOfCodeGeneratedSince(back_edge_target);
-      weight = Min(kMaxBackEdgeWeight,
-                   Max(1, distance / kBackEdgeDistanceUnit));
-    }
-    EmitProfilingCounterDecrement(weight);
-    __ j(positive, &ok, Label::kNear);
-    InterruptStub stub;
-    __ CallStub(&stub);
-  } else {
-    // Count based interrupts happen often enough when they are enabled
-    // that the additional stack checks are not necessary (they would
-    // only check for interrupts).
-    ExternalReference stack_limit =
-        ExternalReference::address_of_stack_limit(isolate());
-    __ cmp(esp, Operand::StaticVariable(stack_limit));
-    __ j(above_equal, &ok, Label::kNear);
-    StackCheckStub stub;
-    __ CallStub(&stub);
+  int weight = 1;
+  if (FLAG_weighted_back_edges) {
+    ASSERT(back_edge_target->is_bound());
+    int distance = masm_->SizeOfCodeGeneratedSince(back_edge_target);
+    weight = Min(kMaxBackEdgeWeight,
+                 Max(1, distance / kBackEdgeDistanceUnit));
   }
+  EmitProfilingCounterDecrement(weight);
+  __ j(positive, &ok, Label::kNear);
+  InterruptStub stub;
+  __ CallStub(&stub);
 
   // Record a mapping of this PC offset to the OSR id.  This is used to find
   // the AST id from the unoptimized code in order to use it as a key into
   // the deoptimization input data found in the optimized code.
-  RecordStackCheck(stmt->OsrEntryId());
+  RecordBackEdge(stmt->OsrEntryId());
 
   // Loop stack checks can be patched to perform on-stack replacement. In
   // order to decide whether or not to perform OSR we embed the loop depth
@@ -369,9 +358,7 @@ void FullCodeGenerator::EmitStackCheck(IterationStatement* stmt,
   ASSERT(loop_depth() > 0);
   __ test(eax, Immediate(Min(loop_depth(), Code::kMaxLoopNestingMarker)));
 
-  if (FLAG_count_based_interrupts) {
-    EmitProfilingCounterReset();
-  }
+  EmitProfilingCounterReset();
 
   __ bind(&ok);
   PrepareForBailoutForId(stmt->EntryId(), NO_REGISTERS);
@@ -754,8 +741,7 @@ void FullCodeGenerator::PrepareForBailoutBeforeSplit(Expression* expr,
 
 
 void FullCodeGenerator::EmitDebugCheckDeclarationContext(Variable* variable) {
-  // The variable in the declaration always resides in the current function
-  // context.
+  // The variable in the declaration always resides in the current context.
   ASSERT_EQ(0, scope()->ContextChainLength(variable->scope()));
   if (generate_debug_code_) {
     // Check that we're not inside a with or catch context.
@@ -884,33 +870,32 @@ void FullCodeGenerator::VisitFunctionDeclaration(
 
 
 void FullCodeGenerator::VisitModuleDeclaration(ModuleDeclaration* declaration) {
-  VariableProxy* proxy = declaration->proxy();
-  Variable* variable = proxy->var();
-  Handle<JSModule> instance = declaration->module()->interface()->Instance();
-  ASSERT(!instance.is_null());
+  Variable* variable = declaration->proxy()->var();
+  ASSERT(variable->location() == Variable::CONTEXT);
+  ASSERT(variable->interface()->IsFrozen());
 
-  switch (variable->location()) {
-    case Variable::UNALLOCATED: {
-      Comment cmnt(masm_, "[ ModuleDeclaration");
-      globals_->Add(variable->name(), zone());
-      globals_->Add(instance, zone());
-      Visit(declaration->module());
-      break;
-    }
+  Comment cmnt(masm_, "[ ModuleDeclaration");
+  EmitDebugCheckDeclarationContext(variable);
 
-    case Variable::CONTEXT: {
-      Comment cmnt(masm_, "[ ModuleDeclaration");
-      EmitDebugCheckDeclarationContext(variable);
-      __ mov(ContextOperand(esi, variable->index()), Immediate(instance));
-      Visit(declaration->module());
-      break;
-    }
+  // Load instance object.
+  __ LoadContext(eax, scope_->ContextChainLength(scope_->GlobalScope()));
+  __ mov(eax, ContextOperand(eax, variable->interface()->Index()));
+  __ mov(eax, ContextOperand(eax, Context::EXTENSION_INDEX));
 
-    case Variable::PARAMETER:
-    case Variable::LOCAL:
-    case Variable::LOOKUP:
-      UNREACHABLE();
-  }
+  // Assign it.
+  __ mov(ContextOperand(esi, variable->index()), eax);
+  // We know that we have written a module, which is not a smi.
+  __ RecordWriteContextSlot(esi,
+                            Context::SlotOffset(variable->index()),
+                            eax,
+                            ecx,
+                            kDontSaveFPRegs,
+                            EMIT_REMEMBERED_SET,
+                            OMIT_SMI_CHECK);
+  PrepareForBailoutForId(declaration->proxy()->id(), NO_REGISTERS);
+
+  // Traverse into body.
+  Visit(declaration->module());
 }
 
 
@@ -945,13 +930,21 @@ void FullCodeGenerator::VisitExportDeclaration(ExportDeclaration* declaration) {
 void FullCodeGenerator::DeclareGlobals(Handle<FixedArray> pairs) {
   // Call the runtime to declare the globals.
   __ push(esi);  // The context is the first argument.
-  __ push(Immediate(pairs));
-  __ push(Immediate(Smi::FromInt(DeclareGlobalsFlags())));
+  __ Push(pairs);
+  __ Push(Smi::FromInt(DeclareGlobalsFlags()));
   __ CallRuntime(Runtime::kDeclareGlobals, 3);
   // Return value is ignored.
 }
 
 
+void FullCodeGenerator::DeclareModules(Handle<FixedArray> descriptions) {
+  // Call the runtime to declare the modules.
+  __ Push(descriptions);
+  __ CallRuntime(Runtime::kDeclareModules, 1);
+  // Return value is ignored.
+}
+
+
 void FullCodeGenerator::VisitSwitchStatement(SwitchStatement* stmt) {
   Comment cmnt(masm_, "[ SwitchStatement");
   Breakable nested_statement(this, stmt);
@@ -1193,7 +1186,7 @@ void FullCodeGenerator::VisitForInStatement(ForInStatement* stmt) {
   __ bind(loop_statement.continue_label());
   __ add(Operand(esp, 0 * kPointerSize), Immediate(Smi::FromInt(1)));
 
-  EmitStackCheck(stmt, &loop);
+  EmitBackEdgeBookkeeping(stmt, &loop);
   __ jmp(&loop);
 
   // Remove the pointers stored on the stack.
@@ -1346,9 +1339,9 @@ void FullCodeGenerator::EmitDynamicLookupFastCase(Variable* var,
   } else if (var->mode() == DYNAMIC_LOCAL) {
     Variable* local = var->local_if_not_shadowed();
     __ mov(eax, ContextSlotOperandCheckExtensions(local, slow));
-    if (local->mode() == CONST ||
-        local->mode() == CONST_HARMONY ||
-        local->mode() == LET) {
+    if (local->mode() == LET ||
+        local->mode() == CONST ||
+        local->mode() == CONST_HARMONY) {
       __ cmp(eax, isolate()->factory()->the_hole_value());
       __ j(not_equal, done);
       if (local->mode() == CONST) {
@@ -2139,37 +2132,15 @@ void FullCodeGenerator::EmitNamedPropertyAssignment(Assignment* expr) {
   ASSERT(prop != NULL);
   ASSERT(prop->key()->AsLiteral() != NULL);
 
-  // If the assignment starts a block of assignments to the same object,
-  // change to slow case to avoid the quadratic behavior of repeatedly
-  // adding fast properties.
-  if (expr->starts_initialization_block()) {
-    __ push(result_register());
-    __ push(Operand(esp, kPointerSize));  // Receiver is now under value.
-    __ CallRuntime(Runtime::kToSlowProperties, 1);
-    __ pop(result_register());
-  }
-
   // Record source code position before IC call.
   SetSourcePosition(expr->position());
   __ mov(ecx, prop->key()->AsLiteral()->handle());
-  if (expr->ends_initialization_block()) {
-    __ mov(edx, Operand(esp, 0));
-  } else {
-    __ pop(edx);
-  }
+  __ pop(edx);
   Handle<Code> ic = is_classic_mode()
       ? isolate()->builtins()->StoreIC_Initialize()
       : isolate()->builtins()->StoreIC_Initialize_Strict();
   CallIC(ic, RelocInfo::CODE_TARGET, expr->AssignmentFeedbackId());
 
-  // If the assignment ends an initialization block, revert to fast case.
-  if (expr->ends_initialization_block()) {
-    __ push(eax);  // Result of assignment, saved even if not needed.
-    __ push(Operand(esp, kPointerSize));  // Receiver is under value.
-    __ CallRuntime(Runtime::kToFastProperties, 1);
-    __ pop(eax);
-    __ Drop(1);
-  }
   PrepareForBailoutForId(expr->AssignmentId(), TOS_REG);
   context()->Plug(eax);
 }
@@ -2181,23 +2152,8 @@ void FullCodeGenerator::EmitKeyedPropertyAssignment(Assignment* expr) {
   // esp[0]            : key
   // esp[kPointerSize] : receiver
 
-  // If the assignment starts a block of assignments to the same object,
-  // change to slow case to avoid the quadratic behavior of repeatedly
-  // adding fast properties.
-  if (expr->starts_initialization_block()) {
-    __ push(result_register());
-    // Receiver is now under the key and value.
-    __ push(Operand(esp, 2 * kPointerSize));
-    __ CallRuntime(Runtime::kToSlowProperties, 1);
-    __ pop(result_register());
-  }
-
   __ pop(ecx);  // Key.
-  if (expr->ends_initialization_block()) {
-    __ mov(edx, Operand(esp, 0));  // Leave receiver on the stack for later.
-  } else {
-    __ pop(edx);
-  }
+  __ pop(edx);
   // Record source code position before IC call.
   SetSourcePosition(expr->position());
   Handle<Code> ic = is_classic_mode()
@@ -2205,15 +2161,6 @@ void FullCodeGenerator::EmitKeyedPropertyAssignment(Assignment* expr) {
       : isolate()->builtins()->KeyedStoreIC_Initialize_Strict();
   CallIC(ic, RelocInfo::CODE_TARGET, expr->AssignmentFeedbackId());
 
-  // If the assignment ends an initialization block, revert to fast case.
-  if (expr->ends_initialization_block()) {
-    __ pop(edx);
-    __ push(eax);  // Result of assignment, saved even if not needed.
-    __ push(edx);
-    __ CallRuntime(Runtime::kToFastProperties, 1);
-    __ pop(eax);
-  }
-
   PrepareForBailoutForId(expr->AssignmentId(), TOS_REG);
   context()->Plug(eax);
 }
@@ -2371,7 +2318,7 @@ void FullCodeGenerator::VisitCall(Call* expr) {
   VariableProxy* proxy = callee->AsVariableProxy();
   Property* property = callee->AsProperty();
 
-  if (proxy != NULL && proxy->var()->is_possibly_eval()) {
+  if (proxy != NULL && proxy->var()->is_possibly_eval(isolate())) {
     // In a call to eval, we first call %ResolvePossiblyDirectEval to
     // resolve the function we need to call and the receiver of the call.
     // Then we call the resolved function using the given arguments.
@@ -2653,7 +2600,7 @@ void FullCodeGenerator::EmitIsStringWrapperSafeForDefaultValueOf(
   context()->PrepareTest(&materialize_true, &materialize_false,
                          &if_true, &if_false, &fall_through);
 
-  if (generate_debug_code_) __ AbortIfSmi(eax);
+  __ AssertNotSmi(eax);
 
   // Check whether this map has already been checked to be safe for default
   // valueOf.
@@ -2669,22 +2616,28 @@ void FullCodeGenerator::EmitIsStringWrapperSafeForDefaultValueOf(
   __ j(equal, if_false);
 
   // Look for valueOf symbol in the descriptor array, and indicate false if
-  // found. The type is not checked, so if it is a transition it is a false
-  // negative.
+  // found. Since we omit an enumeration index check, if it is added via a
+  // transition that shares its descriptor array, this is a false positive.
+  Label entry, loop, done;
+
+  // Skip loop if no descriptors are valid.
+  __ NumberOfOwnDescriptors(ecx, ebx);
+  __ cmp(ecx, 0);
+  __ j(equal, &done);
+
   __ LoadInstanceDescriptors(ebx, ebx);
-  __ mov(ecx, FieldOperand(ebx, FixedArray::kLengthOffset));
-  // ebx: descriptor array
-  // ecx: length of descriptor array
+  // ebx: descriptor array.
+  // ecx: valid entries in the descriptor array.
   // Calculate the end of the descriptor array.
   STATIC_ASSERT(kSmiTag == 0);
   STATIC_ASSERT(kSmiTagSize == 1);
   STATIC_ASSERT(kPointerSize == 4);
-  __ lea(ecx, Operand(ebx, ecx, times_2, FixedArray::kHeaderSize));
+  __ imul(ecx, ecx, DescriptorArray::kDescriptorSize);
+  __ lea(ecx, Operand(ebx, ecx, times_2, DescriptorArray::kFirstOffset));
   // Calculate location of the first key name.
   __ add(ebx, Immediate(DescriptorArray::kFirstOffset));
   // Loop through all the keys in the descriptor array. If one of these is the
   // symbol valueOf the result is false.
-  Label entry, loop;
   __ jmp(&entry);
   __ bind(&loop);
   __ mov(edx, FieldOperand(ebx, 0));
@@ -2695,10 +2648,12 @@ void FullCodeGenerator::EmitIsStringWrapperSafeForDefaultValueOf(
   __ cmp(ebx, ecx);
   __ j(not_equal, &loop);
 
+  __ bind(&done);
+
   // Reload map as register ebx was used as temporary above.
   __ mov(ebx, FieldOperand(eax, HeapObject::kMapOffset));
 
-  // If a valueOf property is not found on the object check that it's
+  // If a valueOf property is not found on the object check that its
   // prototype is the un-modified String prototype. If not result is false.
   __ mov(ecx, FieldOperand(ebx, Map::kPrototypeOffset));
   __ JumpIfSmi(ecx, if_false);
@@ -2876,7 +2831,7 @@ void FullCodeGenerator::EmitArgumentsLength(CallRuntime* expr) {
   __ mov(eax, Operand(ebx, ArgumentsAdaptorFrameConstants::kLengthOffset));
 
   __ bind(&exit);
-  if (generate_debug_code_) __ AbortIfNotSmi(eax);
+  __ AssertSmi(eax);
   context()->Plug(eax);
 }
 
@@ -3105,6 +3060,38 @@ void FullCodeGenerator::EmitDateField(CallRuntime* expr) {
 }
 
 
+void FullCodeGenerator::EmitOneByteSeqStringSetChar(CallRuntime* expr) {
+  ZoneList<Expression*>* args = expr->arguments();
+  ASSERT_EQ(3, args->length());
+
+  VisitForStackValue(args->at(1));  // index
+  VisitForStackValue(args->at(2));  // value
+  __ pop(ecx);
+  __ pop(ebx);
+  VisitForAccumulatorValue(args->at(0));  // string
+
+  static const String::Encoding encoding = String::ONE_BYTE_ENCODING;
+  SeqStringSetCharGenerator::Generate(masm_, encoding, eax, ebx, ecx);
+  context()->Plug(eax);
+}
+
+
+void FullCodeGenerator::EmitTwoByteSeqStringSetChar(CallRuntime* expr) {
+  ZoneList<Expression*>* args = expr->arguments();
+  ASSERT_EQ(3, args->length());
+
+  VisitForStackValue(args->at(1));  // index
+  VisitForStackValue(args->at(2));  // value
+  __ pop(ecx);
+  __ pop(ebx);
+  VisitForAccumulatorValue(args->at(0));  // string
+
+  static const String::Encoding encoding = String::TWO_BYTE_ENCODING;
+  SeqStringSetCharGenerator::Generate(masm_, encoding, eax, ebx, ecx);
+  context()->Plug(eax);
+}
+
+
 void FullCodeGenerator::EmitMathPow(CallRuntime* expr) {
   // Load the arguments on the stack and call the runtime function.
   ZoneList<Expression*>* args = expr->arguments();
@@ -3500,9 +3487,7 @@ void FullCodeGenerator::EmitHasCachedArrayIndex(CallRuntime* expr) {
 
   VisitForAccumulatorValue(args->at(0));
 
-  if (generate_debug_code_) {
-    __ AbortIfNotString(eax);
-  }
+  __ AssertString(eax);
 
   Label materialize_true, materialize_false;
   Label* if_true = NULL;
@@ -3525,7 +3510,7 @@ void FullCodeGenerator::EmitGetCachedArrayIndex(CallRuntime* expr) {
   ASSERT(args->length() == 1);
   VisitForAccumulatorValue(args->at(0));
 
-  __ AbortIfNotString(eax);
+  __ AssertString(eax);
 
   __ mov(eax, FieldOperand(eax, String::kHashFieldOffset));
   __ IndexFromHash(eax, eax);
@@ -3613,10 +3598,10 @@ void FullCodeGenerator::EmitFastAsciiArrayJoin(CallRuntime* expr) {
   __ movzx_b(scratch, FieldOperand(scratch, Map::kInstanceTypeOffset));
   __ and_(scratch, Immediate(
       kIsNotStringMask | kStringEncodingMask | kStringRepresentationMask));
-  __ cmp(scratch, kStringTag | kAsciiStringTag | kSeqStringTag);
+  __ cmp(scratch, kStringTag | kOneByteStringTag | kSeqStringTag);
   __ j(not_equal, &bailout);
   __ add(string_length,
-         FieldOperand(string, SeqAsciiString::kLengthOffset));
+         FieldOperand(string, SeqOneByteString::kLengthOffset));
   __ j(overflow, &bailout);
   __ add(index, Immediate(1));
   __ cmp(index, array_length);
@@ -3645,14 +3630,15 @@ void FullCodeGenerator::EmitFastAsciiArrayJoin(CallRuntime* expr) {
   __ mov(scratch, FieldOperand(string, HeapObject::kMapOffset));
   __ movzx_b(scratch, FieldOperand(scratch, Map::kInstanceTypeOffset));
   __ and_(scratch, Immediate(
-      kIsNotStringMask | kStringEncodingMask | kStringRepresentationMask));
+      kIsNotStringMask | kStringEncodingMask | kAsciiDataHintMask |
+      kStringRepresentationMask));
   __ cmp(scratch, ASCII_STRING_TYPE);
   __ j(not_equal, &bailout);
 
   // Add (separator length times array_length) - separator length
   // to string_length.
   __ mov(scratch, separator_operand);
-  __ mov(scratch, FieldOperand(scratch, SeqAsciiString::kLengthOffset));
+  __ mov(scratch, FieldOperand(scratch, SeqOneByteString::kLengthOffset));
   __ sub(string_length, scratch);  // May be negative, temporarily.
   __ imul(scratch, array_length_operand);
   __ j(overflow, &bailout);
@@ -3666,11 +3652,11 @@ void FullCodeGenerator::EmitFastAsciiArrayJoin(CallRuntime* expr) {
   __ AllocateAsciiString(result_pos, string_length, scratch,
                          index, string, &bailout);
   __ mov(result_operand, result_pos);
-  __ lea(result_pos, FieldOperand(result_pos, SeqAsciiString::kHeaderSize));
+  __ lea(result_pos, FieldOperand(result_pos, SeqOneByteString::kHeaderSize));
 
 
   __ mov(string, separator_operand);
-  __ cmp(FieldOperand(string, SeqAsciiString::kLengthOffset),
+  __ cmp(FieldOperand(string, SeqOneByteString::kLengthOffset),
          Immediate(Smi::FromInt(1)));
   __ j(equal, &one_char_separator);
   __ j(greater, &long_separator);
@@ -3695,7 +3681,7 @@ void FullCodeGenerator::EmitFastAsciiArrayJoin(CallRuntime* expr) {
          FieldOperand(string, String::kLengthOffset));
   __ shr(string_length, 1);
   __ lea(string,
-         FieldOperand(string, SeqAsciiString::kHeaderSize));
+         FieldOperand(string, SeqOneByteString::kHeaderSize));
   __ CopyBytes(string, result_pos, string_length, scratch);
   __ add(index, Immediate(1));
   __ bind(&loop_1_condition);
@@ -3708,7 +3694,7 @@ void FullCodeGenerator::EmitFastAsciiArrayJoin(CallRuntime* expr) {
   // One-character separator case
   __ bind(&one_char_separator);
   // Replace separator with its ASCII character value.
-  __ mov_b(scratch, FieldOperand(string, SeqAsciiString::kHeaderSize));
+  __ mov_b(scratch, FieldOperand(string, SeqOneByteString::kHeaderSize));
   __ mov_b(separator_operand, scratch);
 
   __ Set(index, Immediate(0));
@@ -3736,7 +3722,7 @@ void FullCodeGenerator::EmitFastAsciiArrayJoin(CallRuntime* expr) {
          FieldOperand(string, String::kLengthOffset));
   __ shr(string_length, 1);
   __ lea(string,
-         FieldOperand(string, SeqAsciiString::kHeaderSize));
+         FieldOperand(string, SeqOneByteString::kHeaderSize));
   __ CopyBytes(string, result_pos, string_length, scratch);
   __ add(index, Immediate(1));
 
@@ -3765,7 +3751,7 @@ void FullCodeGenerator::EmitFastAsciiArrayJoin(CallRuntime* expr) {
          FieldOperand(string, String::kLengthOffset));
   __ shr(string_length, 1);
   __ lea(string,
-         FieldOperand(string, SeqAsciiString::kHeaderSize));
+         FieldOperand(string, SeqOneByteString::kHeaderSize));
   __ CopyBytes(string, result_pos, string_length, scratch);
 
   __ bind(&loop_3_entry);
@@ -3777,7 +3763,7 @@ void FullCodeGenerator::EmitFastAsciiArrayJoin(CallRuntime* expr) {
          FieldOperand(string, String::kLengthOffset));
   __ shr(string_length, 1);
   __ lea(string,
-         FieldOperand(string, SeqAsciiString::kHeaderSize));
+         FieldOperand(string, SeqOneByteString::kHeaderSize));
   __ CopyBytes(string, result_pos, string_length, scratch);
   __ add(index, Immediate(1));
 
@@ -4326,29 +4312,7 @@ void FullCodeGenerator::VisitCompareOperation(CompareOperation* expr) {
 
     default: {
       VisitForAccumulatorValue(expr->right());
-      Condition cc = no_condition;
-      switch (op) {
-        case Token::EQ_STRICT:
-        case Token::EQ:
-          cc = equal;
-          break;
-        case Token::LT:
-          cc = less;
-          break;
-        case Token::GT:
-          cc = greater;
-         break;
-        case Token::LTE:
-          cc = less_equal;
-          break;
-        case Token::GTE:
-          cc = greater_equal;
-          break;
-        case Token::IN:
-        case Token::INSTANCEOF:
-        default:
-          UNREACHABLE();
-      }
+      Condition cc = CompareIC::ComputeCondition(op);
       __ pop(edx);
 
       bool inline_smi_code = ShouldInlineSmiCase(op);
diff --git a/deps/v8/src/ia32/ic-ia32.cc b/deps/v8/src/ia32/ic-ia32.cc
index 52d8fa1452..ac5af2bf66 100644
--- a/deps/v8/src/ia32/ic-ia32.cc
+++ b/deps/v8/src/ia32/ic-ia32.cc
@@ -747,6 +747,125 @@ void KeyedStoreIC::GenerateNonStrictArguments(MacroAssembler* masm) {
 }
 
 
+static void KeyedStoreGenerateGenericHelper(
+    MacroAssembler* masm,
+    Label* fast_object,
+    Label* fast_double,
+    Label* slow,
+    KeyedStoreCheckMap check_map,
+    KeyedStoreIncrementLength increment_length) {
+  Label transition_smi_elements;
+  Label finish_object_store, non_double_value, transition_double_elements;
+  Label fast_double_without_map_check;
+  // eax: value
+  // ecx: key (a smi)
+  // edx: receiver
+  // ebx: FixedArray receiver->elements
+  // edi: receiver map
+  // Fast case: Do the store, could either Object or double.
+  __ bind(fast_object);
+  if (check_map == kCheckMap) {
+    __ mov(edi, FieldOperand(ebx, HeapObject::kMapOffset));
+    __ cmp(edi, masm->isolate()->factory()->fixed_array_map());
+    __ j(not_equal, fast_double);
+  }
+  // Smi stores don't require further checks.
+  Label non_smi_value;
+  __ JumpIfNotSmi(eax, &non_smi_value);
+  if (increment_length == kIncrementLength) {
+    // Add 1 to receiver->length.
+    __ add(FieldOperand(edx, JSArray::kLengthOffset),
+           Immediate(Smi::FromInt(1)));
+  }
+  // It's irrelevant whether array is smi-only or not when writing a smi.
+  __ mov(CodeGenerator::FixedArrayElementOperand(ebx, ecx), eax);
+  __ ret(0);
+
+  __ bind(&non_smi_value);
+  // Escape to elements kind transition case.
+  __ mov(edi, FieldOperand(edx, HeapObject::kMapOffset));
+  __ CheckFastObjectElements(edi, &transition_smi_elements);
+
+  // Fast elements array, store the value to the elements backing store.
+  __ bind(&finish_object_store);
+  if (increment_length == kIncrementLength) {
+    // Add 1 to receiver->length.
+    __ add(FieldOperand(edx, JSArray::kLengthOffset),
+           Immediate(Smi::FromInt(1)));
+  }
+  __ mov(CodeGenerator::FixedArrayElementOperand(ebx, ecx), eax);
+  // Update write barrier for the elements array address.
+  __ mov(edx, eax);  // Preserve the value which is returned.
+  __ RecordWriteArray(
+      ebx, edx, ecx, kDontSaveFPRegs, EMIT_REMEMBERED_SET, OMIT_SMI_CHECK);
+  __ ret(0);
+
+  __ bind(fast_double);
+  if (check_map == kCheckMap) {
+    // Check for fast double array case. If this fails, call through to the
+    // runtime.
+    __ cmp(edi, masm->isolate()->factory()->fixed_double_array_map());
+    __ j(not_equal, slow);
+    // If the value is a number, store it as a double in the FastDoubleElements
+    // array.
+  }
+  __ bind(&fast_double_without_map_check);
+  __ StoreNumberToDoubleElements(eax, ebx, ecx, edi, xmm0,
+                                 &transition_double_elements, false);
+  if (increment_length == kIncrementLength) {
+    // Add 1 to receiver->length.
+    __ add(FieldOperand(edx, JSArray::kLengthOffset),
+           Immediate(Smi::FromInt(1)));
+  }
+  __ ret(0);
+
+  __ bind(&transition_smi_elements);
+  __ mov(ebx, FieldOperand(edx, HeapObject::kMapOffset));
+
+  // Transition the array appropriately depending on the value type.
+  __ CheckMap(eax,
+              masm->isolate()->factory()->heap_number_map(),
+              &non_double_value,
+              DONT_DO_SMI_CHECK);
+
+  // Value is a double. Transition FAST_SMI_ELEMENTS -> FAST_DOUBLE_ELEMENTS
+  // and complete the store.
+  __ LoadTransitionedArrayMapConditional(FAST_SMI_ELEMENTS,
+                                         FAST_DOUBLE_ELEMENTS,
+                                         ebx,
+                                         edi,
+                                         slow);
+  ElementsTransitionGenerator::GenerateSmiToDouble(masm, slow);
+  __ mov(ebx, FieldOperand(edx, JSObject::kElementsOffset));
+  __ jmp(&fast_double_without_map_check);
+
+  __ bind(&non_double_value);
+  // Value is not a double, FAST_SMI_ELEMENTS -> FAST_ELEMENTS
+  __ LoadTransitionedArrayMapConditional(FAST_SMI_ELEMENTS,
+                                         FAST_ELEMENTS,
+                                         ebx,
+                                         edi,
+                                         slow);
+  ElementsTransitionGenerator::GenerateMapChangeElementsTransition(masm);
+  __ mov(ebx, FieldOperand(edx, JSObject::kElementsOffset));
+  __ jmp(&finish_object_store);
+
+  __ bind(&transition_double_elements);
+  // Elements are FAST_DOUBLE_ELEMENTS, but value is an Object that's not a
+  // HeapNumber. Make sure that the receiver is a Array with FAST_ELEMENTS and
+  // transition array from FAST_DOUBLE_ELEMENTS to FAST_ELEMENTS
+  __ mov(ebx, FieldOperand(edx, HeapObject::kMapOffset));
+  __ LoadTransitionedArrayMapConditional(FAST_DOUBLE_ELEMENTS,
+                                         FAST_ELEMENTS,
+                                         ebx,
+                                         edi,
+                                         slow);
+  ElementsTransitionGenerator::GenerateDoubleToObject(masm, slow);
+  __ mov(ebx, FieldOperand(edx, JSObject::kElementsOffset));
+  __ jmp(&finish_object_store);
+}
+
+
 void KeyedStoreIC::GenerateGeneric(MacroAssembler* masm,
                                    StrictModeFlag strict_mode) {
   // ----------- S t a t e -------------
@@ -755,10 +874,9 @@ void KeyedStoreIC::GenerateGeneric(MacroAssembler* masm,
   //  -- edx    : receiver
   //  -- esp[0] : return address
   // -----------------------------------
-  Label slow, fast_object_with_map_check, fast_object_without_map_check;
-  Label fast_double_with_map_check, fast_double_without_map_check;
-  Label check_if_double_array, array, extra, transition_smi_elements;
-  Label finish_object_store, non_double_value, transition_double_elements;
+  Label slow, fast_object, fast_object_grow;
+  Label fast_double, fast_double_grow;
+  Label array, extra, check_if_double_array;
 
   // Check that the object isn't a smi.
   __ JumpIfSmi(edx, &slow);
@@ -785,7 +903,7 @@ void KeyedStoreIC::GenerateGeneric(MacroAssembler* masm,
   __ mov(ebx, FieldOperand(edx, JSObject::kElementsOffset));
   // Check array bounds. Both the key and the length of FixedArray are smis.
   __ cmp(ecx, FieldOperand(ebx, FixedArray::kLengthOffset));
-  __ j(below, &fast_object_with_map_check);
+  __ j(below, &fast_object);
 
   // Slow case: call runtime.
   __ bind(&slow);
@@ -808,18 +926,12 @@ void KeyedStoreIC::GenerateGeneric(MacroAssembler* masm,
   __ mov(edi, FieldOperand(ebx, HeapObject::kMapOffset));
   __ cmp(edi, masm->isolate()->factory()->fixed_array_map());
   __ j(not_equal, &check_if_double_array);
-  // Add 1 to receiver->length, and go to common element store code for Objects.
-  __ add(FieldOperand(edx, JSArray::kLengthOffset),
-         Immediate(Smi::FromInt(1)));
-  __ jmp(&fast_object_without_map_check);
+  __ jmp(&fast_object_grow);
 
   __ bind(&check_if_double_array);
   __ cmp(edi, masm->isolate()->factory()->fixed_double_array_map());
   __ j(not_equal, &slow);
-  // Add 1 to receiver->length, and go to common element store code for doubles.
-  __ add(FieldOperand(edx, JSArray::kLengthOffset),
-         Immediate(Smi::FromInt(1)));
-  __ jmp(&fast_double_without_map_check);
+  __ jmp(&fast_double_grow);
 
   // Array case: Get the length and the elements array from the JS
   // array. Check that the array is in fast mode (and writable); if it
@@ -836,94 +948,10 @@ void KeyedStoreIC::GenerateGeneric(MacroAssembler* masm,
   __ cmp(ecx, FieldOperand(edx, JSArray::kLengthOffset));  // Compare smis.
   __ j(above_equal, &extra);
 
-  // Fast case: Do the store, could either Object or double.
-  __ bind(&fast_object_with_map_check);
-  // eax: value
-  // ecx: key (a smi)
-  // edx: receiver
-  // ebx: FixedArray receiver->elements
-  // edi: receiver map
-  __ mov(edi, FieldOperand(ebx, HeapObject::kMapOffset));
-  __ cmp(edi, masm->isolate()->factory()->fixed_array_map());
-  __ j(not_equal, &fast_double_with_map_check);
-  __ bind(&fast_object_without_map_check);
-  // Smi stores don't require further checks.
-  Label non_smi_value;
-  __ JumpIfNotSmi(eax, &non_smi_value);
-  // It's irrelevant whether array is smi-only or not when writing a smi.
-  __ mov(CodeGenerator::FixedArrayElementOperand(ebx, ecx), eax);
-  __ ret(0);
-
-  __ bind(&non_smi_value);
-  // Escape to elements kind transition case.
-  __ mov(edi, FieldOperand(edx, HeapObject::kMapOffset));
-  __ CheckFastObjectElements(edi, &transition_smi_elements);
-
-  // Fast elements array, store the value to the elements backing store.
-  __ bind(&finish_object_store);
-  __ mov(CodeGenerator::FixedArrayElementOperand(ebx, ecx), eax);
-  // Update write barrier for the elements array address.
-  __ mov(edx, eax);  // Preserve the value which is returned.
-  __ RecordWriteArray(
-      ebx, edx, ecx, kDontSaveFPRegs, EMIT_REMEMBERED_SET, OMIT_SMI_CHECK);
-  __ ret(0);
-
-  __ bind(&fast_double_with_map_check);
-  // Check for fast double array case. If this fails, call through to the
-  // runtime.
-  __ cmp(edi, masm->isolate()->factory()->fixed_double_array_map());
-  __ j(not_equal, &slow);
-  __ bind(&fast_double_without_map_check);
-  // If the value is a number, store it as a double in the FastDoubleElements
-  // array.
-  __ StoreNumberToDoubleElements(eax, ebx, ecx, edx, xmm0,
-                                 &transition_double_elements, false);
-  __ ret(0);
-
-  __ bind(&transition_smi_elements);
-  __ mov(ebx, FieldOperand(edx, HeapObject::kMapOffset));
-
-  // Transition the array appropriately depending on the value type.
-  __ CheckMap(eax,
-              masm->isolate()->factory()->heap_number_map(),
-              &non_double_value,
-              DONT_DO_SMI_CHECK);
-
-  // Value is a double. Transition FAST_SMI_ELEMENTS -> FAST_DOUBLE_ELEMENTS
-  // and complete the store.
-  __ LoadTransitionedArrayMapConditional(FAST_SMI_ELEMENTS,
-                                         FAST_DOUBLE_ELEMENTS,
-                                         ebx,
-                                         edi,
-                                         &slow);
-  ElementsTransitionGenerator::GenerateSmiToDouble(masm, &slow);
-  __ mov(ebx, FieldOperand(edx, JSObject::kElementsOffset));
-  __ jmp(&fast_double_without_map_check);
-
-  __ bind(&non_double_value);
-  // Value is not a double, FAST_SMI_ELEMENTS -> FAST_ELEMENTS
-  __ LoadTransitionedArrayMapConditional(FAST_SMI_ELEMENTS,
-                                         FAST_ELEMENTS,
-                                         ebx,
-                                         edi,
-                                         &slow);
-  ElementsTransitionGenerator::GenerateMapChangeElementsTransition(masm);
-  __ mov(ebx, FieldOperand(edx, JSObject::kElementsOffset));
-  __ jmp(&finish_object_store);
-
-  __ bind(&transition_double_elements);
-  // Elements are FAST_DOUBLE_ELEMENTS, but value is an Object that's not a
-  // HeapNumber. Make sure that the receiver is a Array with FAST_ELEMENTS and
-  // transition array from FAST_DOUBLE_ELEMENTS to FAST_ELEMENTS
-  __ mov(ebx, FieldOperand(edx, HeapObject::kMapOffset));
-  __ LoadTransitionedArrayMapConditional(FAST_DOUBLE_ELEMENTS,
-                                         FAST_ELEMENTS,
-                                         ebx,
-                                         edi,
-                                         &slow);
-  ElementsTransitionGenerator::GenerateDoubleToObject(masm, &slow);
-  __ mov(ebx, FieldOperand(edx, JSObject::kElementsOffset));
-  __ jmp(&finish_object_store);
+  KeyedStoreGenerateGenericHelper(masm, &fast_object, &fast_double,
+                                  &slow, kCheckMap, kDontIncrementLength);
+  KeyedStoreGenerateGenericHelper(masm, &fast_object_grow, &fast_double_grow,
+                                  &slow, kDontCheckMap, kIncrementLength);
 }
 
 
@@ -1687,7 +1715,7 @@ Condition CompareIC::ComputeCondition(Token::Value op) {
 }
 
 
-static bool HasInlinedSmiCode(Address address) {
+bool CompareIC::HasInlinedSmiCode(Address address) {
   // The address of the instruction following the call.
   Address test_instruction_address =
       address + Assembler::kCallTargetAddressOffset;
@@ -1698,40 +1726,6 @@ static bool HasInlinedSmiCode(Address address) {
 }
 
 
-void CompareIC::UpdateCaches(Handle<Object> x, Handle<Object> y) {
-  HandleScope scope;
-  Handle<Code> rewritten;
-  State previous_state = GetState();
-
-  State state = TargetState(previous_state, HasInlinedSmiCode(address()), x, y);
-  if (state == GENERIC) {
-    CompareStub stub(GetCondition(), strict(), NO_COMPARE_FLAGS);
-    rewritten = stub.GetCode();
-  } else {
-    ICCompareStub stub(op_, state);
-    if (state == KNOWN_OBJECTS) {
-      stub.set_known_map(Handle<Map>(Handle<JSObject>::cast(x)->map()));
-    }
-    rewritten = stub.GetCode();
-  }
-  set_target(*rewritten);
-
-#ifdef DEBUG
-  if (FLAG_trace_ic) {
-    PrintF("[CompareIC (%s->%s)#%s]\n",
-           GetStateName(previous_state),
-           GetStateName(state),
-           Token::Name(op_));
-  }
-#endif
-
-  // Activate inlined smi code.
-  if (previous_state == UNINITIALIZED) {
-    PatchInlinedSmiCode(address(), ENABLE_INLINED_SMI_CHECK);
-  }
-}
-
-
 void PatchInlinedSmiCode(Address address, InlinedSmiCheck check) {
   // The address of the instruction following the call.
   Address test_instruction_address =
diff --git a/deps/v8/src/ia32/lithium-codegen-ia32.cc b/deps/v8/src/ia32/lithium-codegen-ia32.cc
index 2b42b13a1a..e03f73323d 100644
--- a/deps/v8/src/ia32/lithium-codegen-ia32.cc
+++ b/deps/v8/src/ia32/lithium-codegen-ia32.cc
@@ -176,6 +176,7 @@ bool LCodeGen::GeneratePrologue() {
     __ bind(&do_not_pad);
   }
 
+  info()->set_prologue_offset(masm_->pc_offset());
   __ push(ebp);  // Caller's frame pointer.
   __ mov(ebp, esp);
   __ push(esi);  // Callee's context.
@@ -293,7 +294,30 @@ bool LCodeGen::GenerateBody() {
     }
 
     if (emit_instructions) {
-      Comment(";;; @%d: %s.", current_instruction_, instr->Mnemonic());
+      if (FLAG_code_comments) {
+        HValue* hydrogen = instr->hydrogen_value();
+        if (hydrogen != NULL) {
+          if (hydrogen->IsChange()) {
+            HValue* changed_value = HChange::cast(hydrogen)->value();
+            int use_id = 0;
+            const char* use_mnemo = "dead";
+            if (hydrogen->UseCount() >= 1) {
+              HValue* use_value = hydrogen->uses().value();
+              use_id = use_value->id();
+              use_mnemo = use_value->Mnemonic();
+            }
+            Comment(";;; @%d: %s. <of #%d %s for #%d %s>",
+                    current_instruction_, instr->Mnemonic(),
+                    changed_value->id(), changed_value->Mnemonic(),
+                    use_id, use_mnemo);
+          } else {
+            Comment(";;; @%d: %s. <#%d>", current_instruction_,
+                    instr->Mnemonic(), hydrogen->id());
+          }
+        } else {
+          Comment(";;; @%d: %s.", current_instruction_, instr->Mnemonic());
+        }
+      }
       instr->CompileToNative(this);
     }
   }
@@ -404,7 +428,9 @@ Operand LCodeGen::HighOperand(LOperand* op) {
 
 
 void LCodeGen::WriteTranslation(LEnvironment* environment,
-                                Translation* translation) {
+                                Translation* translation,
+                                int* arguments_index,
+                                int* arguments_count) {
   if (environment == NULL) return;
 
   // The translation includes one command per value in the environment.
@@ -412,7 +438,17 @@ void LCodeGen::WriteTranslation(LEnvironment* environment,
   // The output frame height does not include the parameters.
   int height = translation_size - environment->parameter_count();
 
-  WriteTranslation(environment->outer(), translation);
+  // Function parameters are arguments to the outermost environment. The
+  // arguments index points to the first element of a sequence of tagged
+  // values on the stack that represent the arguments. This needs to be
+  // kept in sync with the LArgumentsElements implementation.
+  *arguments_index = -environment->parameter_count();
+  *arguments_count = environment->parameter_count();
+
+  WriteTranslation(environment->outer(),
+                   translation,
+                   arguments_index,
+                   arguments_count);
   int closure_id = *info()->closure() != *environment->closure()
       ? DefineDeoptimizationLiteral(environment->closure())
       : Translation::kSelfLiteralId;
@@ -437,6 +473,17 @@ void LCodeGen::WriteTranslation(LEnvironment* environment,
       translation->BeginArgumentsAdaptorFrame(closure_id, translation_size);
       break;
   }
+
+  // Inlined frames which push their arguments cause the index to be
+  // bumped and another stack area to be used for materialization.
+  if (environment->entry() != NULL &&
+      environment->entry()->arguments_pushed()) {
+    *arguments_index = *arguments_index < 0
+        ? GetStackSlotCount()
+        : *arguments_index + *arguments_count;
+    *arguments_count = environment->entry()->arguments_count() + 1;
+  }
+
   for (int i = 0; i < translation_size; ++i) {
     LOperand* value = environment->values()->at(i);
     // spilled_registers_ and spilled_double_registers_ are either
@@ -448,7 +495,9 @@ void LCodeGen::WriteTranslation(LEnvironment* environment,
         AddToTranslation(translation,
                          environment->spilled_registers()[value->index()],
                          environment->HasTaggedValueAt(i),
-                         environment->HasUint32ValueAt(i));
+                         environment->HasUint32ValueAt(i),
+                         *arguments_index,
+                         *arguments_count);
       } else if (
           value->IsDoubleRegister() &&
           environment->spilled_double_registers()[value->index()] != NULL) {
@@ -457,14 +506,18 @@ void LCodeGen::WriteTranslation(LEnvironment* environment,
             translation,
             environment->spilled_double_registers()[value->index()],
             false,
-            false);
+            false,
+            *arguments_index,
+            *arguments_count);
       }
     }
 
     AddToTranslation(translation,
                      value,
                      environment->HasTaggedValueAt(i),
-                     environment->HasUint32ValueAt(i));
+                     environment->HasUint32ValueAt(i),
+                     *arguments_index,
+                     *arguments_count);
   }
 }
 
@@ -472,12 +525,14 @@ void LCodeGen::WriteTranslation(LEnvironment* environment,
 void LCodeGen::AddToTranslation(Translation* translation,
                                 LOperand* op,
                                 bool is_tagged,
-                                bool is_uint32) {
+                                bool is_uint32,
+                                int arguments_index,
+                                int arguments_count) {
   if (op == NULL) {
     // TODO(twuerthinger): Introduce marker operands to indicate that this value
     // is not present and must be reconstructed from the deoptimizer. Currently
     // this is only used for the arguments object.
-    translation->StoreArgumentsObject();
+    translation->StoreArgumentsObject(arguments_index, arguments_count);
   } else if (op->IsStackSlot()) {
     if (is_tagged) {
       translation->StoreStackSlot(op->index());
@@ -596,15 +651,16 @@ void LCodeGen::RegisterEnvironmentForDeoptimization(
 
     int frame_count = 0;
     int jsframe_count = 0;
+    int args_index = 0;
+    int args_count = 0;
     for (LEnvironment* e = environment; e != NULL; e = e->outer()) {
       ++frame_count;
       if (e->frame_type() == JS_FUNCTION) {
         ++jsframe_count;
       }
     }
-    Translation translation(&translations_, frame_count, jsframe_count,
-                            zone());
-    WriteTranslation(environment, &translation);
+    Translation translation(&translations_, frame_count, jsframe_count, zone());
+    WriteTranslation(environment, &translation, &args_index, &args_count);
     int deoptimization_index = deoptimizations_.length();
     int pc_offset = masm()->pc_offset();
     environment->Register(deoptimization_index,
@@ -877,7 +933,7 @@ void LCodeGen::DoUnknownOSRValue(LUnknownOSRValue* instr) {
 
 void LCodeGen::DoModI(LModI* instr) {
   if (instr->hydrogen()->HasPowerOf2Divisor()) {
-    Register dividend = ToRegister(instr->InputAt(0));
+    Register dividend = ToRegister(instr->left());
 
     int32_t divisor =
         HConstant::cast(instr->hydrogen()->right())->Integer32Value();
@@ -901,8 +957,8 @@ void LCodeGen::DoModI(LModI* instr) {
     __ bind(&done);
   } else {
     Label done, remainder_eq_dividend, slow, do_subtraction, both_positive;
-    Register left_reg = ToRegister(instr->InputAt(0));
-    Register right_reg = ToRegister(instr->InputAt(1));
+    Register left_reg = ToRegister(instr->left());
+    Register right_reg = ToRegister(instr->right());
     Register result_reg = ToRegister(instr->result());
 
     ASSERT(left_reg.is(eax));
@@ -932,7 +988,7 @@ void LCodeGen::DoModI(LModI* instr) {
     __ j(less, &remainder_eq_dividend, Label::kNear);
 
     // Check if the divisor is a PowerOfTwo integer.
-    Register scratch = ToRegister(instr->TempAt(0));
+    Register scratch = ToRegister(instr->temp());
     __ mov(scratch, right_reg);
     __ sub(Operand(scratch), Immediate(1));
     __ test(scratch, Operand(right_reg));
@@ -988,11 +1044,48 @@ void LCodeGen::DoModI(LModI* instr) {
 
 
 void LCodeGen::DoDivI(LDivI* instr) {
-  LOperand* right = instr->InputAt(1);
+  if (instr->hydrogen()->HasPowerOf2Divisor()) {
+    Register dividend = ToRegister(instr->left());
+    int32_t divisor =
+        HConstant::cast(instr->hydrogen()->right())->Integer32Value();
+    int32_t test_value = 0;
+    int32_t power = 0;
+
+    if (divisor > 0) {
+      test_value = divisor - 1;
+      power = WhichPowerOf2(divisor);
+    } else {
+      // Check for (0 / -x) that will produce negative zero.
+      if (instr->hydrogen()->CheckFlag(HValue::kBailoutOnMinusZero)) {
+        __ test(dividend, Operand(dividend));
+        DeoptimizeIf(zero, instr->environment());
+      }
+      // Check for (kMinInt / -1).
+      if (divisor == -1 && instr->hydrogen()->CheckFlag(HValue::kCanOverflow)) {
+        __ cmp(dividend, kMinInt);
+        DeoptimizeIf(zero, instr->environment());
+      }
+      test_value = - divisor - 1;
+      power = WhichPowerOf2(-divisor);
+    }
+
+    if (test_value != 0) {
+      // Deoptimize if remainder is not 0.
+      __ test(dividend, Immediate(test_value));
+      DeoptimizeIf(not_zero, instr->environment());
+      __ sar(dividend, power);
+    }
+
+    if (divisor < 0) __ neg(dividend);
+
+    return;
+  }
+
+  LOperand* right = instr->right();
   ASSERT(ToRegister(instr->result()).is(eax));
-  ASSERT(ToRegister(instr->InputAt(0)).is(eax));
-  ASSERT(!ToRegister(instr->InputAt(1)).is(eax));
-  ASSERT(!ToRegister(instr->InputAt(1)).is(edx));
+  ASSERT(ToRegister(instr->left()).is(eax));
+  ASSERT(!ToRegister(instr->right()).is(eax));
+  ASSERT(!ToRegister(instr->right()).is(edx));
 
   Register left_reg = eax;
 
@@ -1013,7 +1106,7 @@ void LCodeGen::DoDivI(LDivI* instr) {
     __ bind(&left_not_zero);
   }
 
-  // Check for (-kMinInt / -1).
+  // Check for (kMinInt / -1).
   if (instr->hydrogen()->CheckFlag(HValue::kCanOverflow)) {
     Label left_not_min_int;
     __ cmp(left_reg, kMinInt);
@@ -1034,10 +1127,10 @@ void LCodeGen::DoDivI(LDivI* instr) {
 
 
 void LCodeGen::DoMathFloorOfDiv(LMathFloorOfDiv* instr) {
-  ASSERT(instr->InputAt(1)->IsConstantOperand());
+  ASSERT(instr->right()->IsConstantOperand());
 
-  Register dividend = ToRegister(instr->InputAt(0));
-  int32_t divisor = ToInteger32(LConstantOperand::cast(instr->InputAt(1)));
+  Register dividend = ToRegister(instr->left());
+  int32_t divisor = ToInteger32(LConstantOperand::cast(instr->right()));
   Register result = ToRegister(instr->result());
 
   switch (divisor) {
@@ -1083,9 +1176,9 @@ void LCodeGen::DoMathFloorOfDiv(LMathFloorOfDiv* instr) {
       __ sar(result, power);
     }
   } else {
-    ASSERT(ToRegister(instr->InputAt(0)).is(eax));
+    ASSERT(ToRegister(instr->left()).is(eax));
     ASSERT(ToRegister(instr->result()).is(edx));
-    Register scratch = ToRegister(instr->TempAt(0));
+    Register scratch = ToRegister(instr->temp());
 
     // Find b which: 2^b < divisor_abs < 2^(b+1).
     unsigned b = 31 - CompilerIntrinsics::CountLeadingZeros(divisor_abs);
@@ -1137,11 +1230,11 @@ void LCodeGen::DoMathFloorOfDiv(LMathFloorOfDiv* instr) {
 
 
 void LCodeGen::DoMulI(LMulI* instr) {
-  Register left = ToRegister(instr->InputAt(0));
-  LOperand* right = instr->InputAt(1);
+  Register left = ToRegister(instr->left());
+  LOperand* right = instr->right();
 
   if (instr->hydrogen()->CheckFlag(HValue::kBailoutOnMinusZero)) {
-    __ mov(ToRegister(instr->TempAt(0)), left);
+    __ mov(ToRegister(instr->temp()), left);
   }
 
   if (right->IsConstantOperand()) {
@@ -1202,12 +1295,15 @@ void LCodeGen::DoMulI(LMulI* instr) {
     __ test(left, Operand(left));
     __ j(not_zero, &done, Label::kNear);
     if (right->IsConstantOperand()) {
-      if (ToInteger32(LConstantOperand::cast(right)) <= 0) {
+      if (ToInteger32(LConstantOperand::cast(right)) < 0) {
         DeoptimizeIf(no_condition, instr->environment());
+      } else if (ToInteger32(LConstantOperand::cast(right)) == 0) {
+        __ cmp(ToRegister(instr->temp()), Immediate(0));
+        DeoptimizeIf(less, instr->environment());
       }
     } else {
       // Test the non-zero operand for negative sign.
-      __ or_(ToRegister(instr->TempAt(0)), ToOperand(right));
+      __ or_(ToRegister(instr->temp()), ToOperand(right));
       DeoptimizeIf(sign, instr->environment());
     }
     __ bind(&done);
@@ -1216,8 +1312,8 @@ void LCodeGen::DoMulI(LMulI* instr) {
 
 
 void LCodeGen::DoBitI(LBitI* instr) {
-  LOperand* left = instr->InputAt(0);
-  LOperand* right = instr->InputAt(1);
+  LOperand* left = instr->left();
+  LOperand* right = instr->right();
   ASSERT(left->Equals(instr->result()));
   ASSERT(left->IsRegister());
 
@@ -1257,14 +1353,21 @@ void LCodeGen::DoBitI(LBitI* instr) {
 
 
 void LCodeGen::DoShiftI(LShiftI* instr) {
-  LOperand* left = instr->InputAt(0);
-  LOperand* right = instr->InputAt(1);
+  LOperand* left = instr->left();
+  LOperand* right = instr->right();
   ASSERT(left->Equals(instr->result()));
   ASSERT(left->IsRegister());
   if (right->IsRegister()) {
     ASSERT(ToRegister(right).is(ecx));
 
     switch (instr->op()) {
+      case Token::ROR:
+        __ ror_cl(ToRegister(left));
+        if (instr->can_deopt()) {
+          __ test(ToRegister(left), Immediate(0x80000000));
+          DeoptimizeIf(not_zero, instr->environment());
+        }
+        break;
       case Token::SAR:
         __ sar_cl(ToRegister(left));
         break;
@@ -1286,6 +1389,14 @@ void LCodeGen::DoShiftI(LShiftI* instr) {
     int value = ToInteger32(LConstantOperand::cast(right));
     uint8_t shift_count = static_cast<uint8_t>(value & 0x1F);
     switch (instr->op()) {
+      case Token::ROR:
+        if (shift_count == 0 && instr->can_deopt()) {
+          __ test(ToRegister(left), Immediate(0x80000000));
+          DeoptimizeIf(not_zero, instr->environment());
+        } else {
+          __ ror(ToRegister(left), shift_count);
+        }
+        break;
       case Token::SAR:
         if (shift_count != 0) {
           __ sar(ToRegister(left), shift_count);
@@ -1313,8 +1424,8 @@ void LCodeGen::DoShiftI(LShiftI* instr) {
 
 
 void LCodeGen::DoSubI(LSubI* instr) {
-  LOperand* left = instr->InputAt(0);
-  LOperand* right = instr->InputAt(1);
+  LOperand* left = instr->left();
+  LOperand* right = instr->right();
   ASSERT(left->Equals(instr->result()));
 
   if (right->IsConstantOperand()) {
@@ -1343,7 +1454,7 @@ void LCodeGen::DoConstantD(LConstantD* instr) {
   if (BitCast<uint64_t, double>(v) == 0) {
     __ xorps(res, res);
   } else {
-    Register temp = ToRegister(instr->TempAt(0));
+    Register temp = ToRegister(instr->temp());
     uint64_t int_val = BitCast<uint64_t, double>(v);
     int32_t lower = static_cast<int32_t>(int_val);
     int32_t upper = static_cast<int32_t>(int_val >> (kBitsPerInt));
@@ -1386,7 +1497,7 @@ void LCodeGen::DoConstantT(LConstantT* instr) {
 
 void LCodeGen::DoJSArrayLength(LJSArrayLength* instr) {
   Register result = ToRegister(instr->result());
-  Register array = ToRegister(instr->InputAt(0));
+  Register array = ToRegister(instr->value());
   __ mov(result, FieldOperand(array, JSArray::kLengthOffset));
 }
 
@@ -1394,21 +1505,21 @@ void LCodeGen::DoJSArrayLength(LJSArrayLength* instr) {
 void LCodeGen::DoFixedArrayBaseLength(
     LFixedArrayBaseLength* instr) {
   Register result = ToRegister(instr->result());
-  Register array = ToRegister(instr->InputAt(0));
+  Register array = ToRegister(instr->value());
   __ mov(result, FieldOperand(array, FixedArrayBase::kLengthOffset));
 }
 
 
 void LCodeGen::DoMapEnumLength(LMapEnumLength* instr) {
   Register result = ToRegister(instr->result());
-  Register map = ToRegister(instr->InputAt(0));
+  Register map = ToRegister(instr->value());
   __ EnumLength(result, map);
 }
 
 
 void LCodeGen::DoElementsKind(LElementsKind* instr) {
   Register result = ToRegister(instr->result());
-  Register input = ToRegister(instr->InputAt(0));
+  Register input = ToRegister(instr->value());
 
   // Load map into |result|.
   __ mov(result, FieldOperand(input, HeapObject::kMapOffset));
@@ -1422,9 +1533,9 @@ void LCodeGen::DoElementsKind(LElementsKind* instr) {
 
 
 void LCodeGen::DoValueOf(LValueOf* instr) {
-  Register input = ToRegister(instr->InputAt(0));
+  Register input = ToRegister(instr->value());
   Register result = ToRegister(instr->result());
-  Register map = ToRegister(instr->TempAt(0));
+  Register map = ToRegister(instr->temp());
   ASSERT(input.is(result));
 
   Label done;
@@ -1441,9 +1552,9 @@ void LCodeGen::DoValueOf(LValueOf* instr) {
 
 
 void LCodeGen::DoDateField(LDateField* instr) {
-  Register object = ToRegister(instr->InputAt(0));
+  Register object = ToRegister(instr->date());
   Register result = ToRegister(instr->result());
-  Register scratch = ToRegister(instr->TempAt(0));
+  Register scratch = ToRegister(instr->temp());
   Smi* index = instr->index();
   Label runtime, done;
   ASSERT(object.is(result));
@@ -1476,8 +1587,17 @@ void LCodeGen::DoDateField(LDateField* instr) {
 }
 
 
+void LCodeGen::DoSeqStringSetChar(LSeqStringSetChar* instr) {
+  SeqStringSetCharGenerator::Generate(masm(),
+                                      instr->encoding(),
+                                      ToRegister(instr->string()),
+                                      ToRegister(instr->index()),
+                                      ToRegister(instr->value()));
+}
+
+
 void LCodeGen::DoBitNotI(LBitNotI* instr) {
-  LOperand* input = instr->InputAt(0);
+  LOperand* input = instr->value();
   ASSERT(input->Equals(instr->result()));
   __ not_(ToRegister(input));
 }
@@ -1496,8 +1616,8 @@ void LCodeGen::DoThrow(LThrow* instr) {
 
 
 void LCodeGen::DoAddI(LAddI* instr) {
-  LOperand* left = instr->InputAt(0);
-  LOperand* right = instr->InputAt(1);
+  LOperand* left = instr->left();
+  LOperand* right = instr->right();
   ASSERT(left->Equals(instr->result()));
 
   if (right->IsConstantOperand()) {
@@ -1513,8 +1633,8 @@ void LCodeGen::DoAddI(LAddI* instr) {
 
 
 void LCodeGen::DoMathMinMax(LMathMinMax* instr) {
-  LOperand* left = instr->InputAt(0);
-  LOperand* right = instr->InputAt(1);
+  LOperand* left = instr->left();
+  LOperand* right = instr->right();
   ASSERT(left->Equals(instr->result()));
   HMathMinMax::Operation operation = instr->hydrogen()->operation();
   if (instr->hydrogen()->representation().IsInteger32()) {
@@ -1574,8 +1694,8 @@ void LCodeGen::DoMathMinMax(LMathMinMax* instr) {
 
 
 void LCodeGen::DoArithmeticD(LArithmeticD* instr) {
-  XMMRegister left = ToDoubleRegister(instr->InputAt(0));
-  XMMRegister right = ToDoubleRegister(instr->InputAt(1));
+  XMMRegister left = ToDoubleRegister(instr->left());
+  XMMRegister right = ToDoubleRegister(instr->right());
   XMMRegister result = ToDoubleRegister(instr->result());
   // Modulo uses a fixed result register.
   ASSERT(instr->op() == Token::MOD || left.is(result));
@@ -1661,17 +1781,17 @@ void LCodeGen::DoBranch(LBranch* instr) {
 
   Representation r = instr->hydrogen()->value()->representation();
   if (r.IsInteger32()) {
-    Register reg = ToRegister(instr->InputAt(0));
+    Register reg = ToRegister(instr->value());
     __ test(reg, Operand(reg));
     EmitBranch(true_block, false_block, not_zero);
   } else if (r.IsDouble()) {
-    XMMRegister reg = ToDoubleRegister(instr->InputAt(0));
+    XMMRegister reg = ToDoubleRegister(instr->value());
     __ xorps(xmm0, xmm0);
     __ ucomisd(reg, xmm0);
     EmitBranch(true_block, false_block, not_equal);
   } else {
     ASSERT(r.IsTagged());
-    Register reg = ToRegister(instr->InputAt(0));
+    Register reg = ToRegister(instr->value());
     HType type = instr->hydrogen()->value()->type();
     if (type.IsBoolean()) {
       __ cmp(reg, factory()->true_value());
@@ -1719,7 +1839,7 @@ void LCodeGen::DoBranch(LBranch* instr) {
 
       Register map = no_reg;  // Keep the compiler happy.
       if (expected.NeedsMap()) {
-        map = ToRegister(instr->TempAt(0));
+        map = ToRegister(instr->temp());
         ASSERT(!map.is(reg));
         __ mov(map, FieldOperand(reg, HeapObject::kMapOffset));
 
@@ -1812,8 +1932,8 @@ Condition LCodeGen::TokenToCondition(Token::Value op, bool is_unsigned) {
 
 
 void LCodeGen::DoCmpIDAndBranch(LCmpIDAndBranch* instr) {
-  LOperand* left = instr->InputAt(0);
-  LOperand* right = instr->InputAt(1);
+  LOperand* left = instr->left();
+  LOperand* right = instr->right();
   int false_block = chunk_->LookupDestination(instr->false_block_id());
   int true_block = chunk_->LookupDestination(instr->true_block_id());
   Condition cc = TokenToCondition(instr->op(), instr->is_double());
@@ -1849,8 +1969,8 @@ void LCodeGen::DoCmpIDAndBranch(LCmpIDAndBranch* instr) {
 
 
 void LCodeGen::DoCmpObjectEqAndBranch(LCmpObjectEqAndBranch* instr) {
-  Register left = ToRegister(instr->InputAt(0));
-  Operand right = ToOperand(instr->InputAt(1));
+  Register left = ToRegister(instr->left());
+  Operand right = ToOperand(instr->right());
   int false_block = chunk_->LookupDestination(instr->false_block_id());
   int true_block = chunk_->LookupDestination(instr->true_block_id());
 
@@ -1860,7 +1980,7 @@ void LCodeGen::DoCmpObjectEqAndBranch(LCmpObjectEqAndBranch* instr) {
 
 
 void LCodeGen::DoCmpConstantEqAndBranch(LCmpConstantEqAndBranch* instr) {
-  Register left = ToRegister(instr->InputAt(0));
+  Register left = ToRegister(instr->left());
   int true_block = chunk_->LookupDestination(instr->true_block_id());
   int false_block = chunk_->LookupDestination(instr->false_block_id());
 
@@ -1870,7 +1990,7 @@ void LCodeGen::DoCmpConstantEqAndBranch(LCmpConstantEqAndBranch* instr) {
 
 
 void LCodeGen::DoIsNilAndBranch(LIsNilAndBranch* instr) {
-  Register reg = ToRegister(instr->InputAt(0));
+  Register reg = ToRegister(instr->value());
   int false_block = chunk_->LookupDestination(instr->false_block_id());
 
   // If the expression is known to be untagged or a smi, then it's definitely
@@ -1900,7 +2020,7 @@ void LCodeGen::DoIsNilAndBranch(LIsNilAndBranch* instr) {
     __ JumpIfSmi(reg, false_label);
     // Check for undetectable objects by looking in the bit field in
     // the map. The object has already been smi checked.
-    Register scratch = ToRegister(instr->TempAt(0));
+    Register scratch = ToRegister(instr->temp());
     __ mov(scratch, FieldOperand(reg, HeapObject::kMapOffset));
     __ movzx_b(scratch, FieldOperand(scratch, Map::kBitFieldOffset));
     __ test(scratch, Immediate(1 << Map::kIsUndetectable));
@@ -1933,8 +2053,8 @@ Condition LCodeGen::EmitIsObject(Register input,
 
 
 void LCodeGen::DoIsObjectAndBranch(LIsObjectAndBranch* instr) {
-  Register reg = ToRegister(instr->InputAt(0));
-  Register temp = ToRegister(instr->TempAt(0));
+  Register reg = ToRegister(instr->value());
+  Register temp = ToRegister(instr->temp());
 
   int true_block = chunk_->LookupDestination(instr->true_block_id());
   int false_block = chunk_->LookupDestination(instr->false_block_id());
@@ -1959,8 +2079,8 @@ Condition LCodeGen::EmitIsString(Register input,
 
 
 void LCodeGen::DoIsStringAndBranch(LIsStringAndBranch* instr) {
-  Register reg = ToRegister(instr->InputAt(0));
-  Register temp = ToRegister(instr->TempAt(0));
+  Register reg = ToRegister(instr->value());
+  Register temp = ToRegister(instr->temp());
 
   int true_block = chunk_->LookupDestination(instr->true_block_id());
   int false_block = chunk_->LookupDestination(instr->false_block_id());
@@ -1973,7 +2093,7 @@ void LCodeGen::DoIsStringAndBranch(LIsStringAndBranch* instr) {
 
 
 void LCodeGen::DoIsSmiAndBranch(LIsSmiAndBranch* instr) {
-  Operand input = ToOperand(instr->InputAt(0));
+  Operand input = ToOperand(instr->value());
 
   int true_block = chunk_->LookupDestination(instr->true_block_id());
   int false_block = chunk_->LookupDestination(instr->false_block_id());
@@ -1984,8 +2104,8 @@ void LCodeGen::DoIsSmiAndBranch(LIsSmiAndBranch* instr) {
 
 
 void LCodeGen::DoIsUndetectableAndBranch(LIsUndetectableAndBranch* instr) {
-  Register input = ToRegister(instr->InputAt(0));
-  Register temp = ToRegister(instr->TempAt(0));
+  Register input = ToRegister(instr->value());
+  Register temp = ToRegister(instr->temp());
 
   int true_block = chunk_->LookupDestination(instr->true_block_id());
   int false_block = chunk_->LookupDestination(instr->false_block_id());
@@ -2055,8 +2175,8 @@ static Condition BranchCondition(HHasInstanceTypeAndBranch* instr) {
 
 
 void LCodeGen::DoHasInstanceTypeAndBranch(LHasInstanceTypeAndBranch* instr) {
-  Register input = ToRegister(instr->InputAt(0));
-  Register temp = ToRegister(instr->TempAt(0));
+  Register input = ToRegister(instr->value());
+  Register temp = ToRegister(instr->temp());
 
   int true_block = chunk_->LookupDestination(instr->true_block_id());
   int false_block = chunk_->LookupDestination(instr->false_block_id());
@@ -2071,10 +2191,10 @@ void LCodeGen::DoHasInstanceTypeAndBranch(LHasInstanceTypeAndBranch* instr) {
 
 
 void LCodeGen::DoGetCachedArrayIndex(LGetCachedArrayIndex* instr) {
-  Register input = ToRegister(instr->InputAt(0));
+  Register input = ToRegister(instr->value());
   Register result = ToRegister(instr->result());
 
-  __ AbortIfNotString(input);
+  __ AssertString(input);
 
   __ mov(result, FieldOperand(input, String::kHashFieldOffset));
   __ IndexFromHash(result, result);
@@ -2083,7 +2203,7 @@ void LCodeGen::DoGetCachedArrayIndex(LGetCachedArrayIndex* instr) {
 
 void LCodeGen::DoHasCachedArrayIndexAndBranch(
     LHasCachedArrayIndexAndBranch* instr) {
-  Register input = ToRegister(instr->InputAt(0));
+  Register input = ToRegister(instr->value());
 
   int true_block = chunk_->LookupDestination(instr->true_block_id());
   int false_block = chunk_->LookupDestination(instr->false_block_id());
@@ -2160,9 +2280,9 @@ void LCodeGen::EmitClassOfTest(Label* is_true,
 
 
 void LCodeGen::DoClassOfTestAndBranch(LClassOfTestAndBranch* instr) {
-  Register input = ToRegister(instr->InputAt(0));
-  Register temp = ToRegister(instr->TempAt(0));
-  Register temp2 = ToRegister(instr->TempAt(1));
+  Register input = ToRegister(instr->value());
+  Register temp = ToRegister(instr->temp());
+  Register temp2 = ToRegister(instr->temp2());
 
   Handle<String> class_name = instr->hydrogen()->class_name();
 
@@ -2179,7 +2299,7 @@ void LCodeGen::DoClassOfTestAndBranch(LClassOfTestAndBranch* instr) {
 
 
 void LCodeGen::DoCmpMapAndBranch(LCmpMapAndBranch* instr) {
-  Register reg = ToRegister(instr->InputAt(0));
+  Register reg = ToRegister(instr->value());
   int true_block = instr->true_block_id();
   int false_block = instr->false_block_id();
 
@@ -2225,8 +2345,8 @@ void LCodeGen::DoInstanceOfKnownGlobal(LInstanceOfKnownGlobal* instr) {
   deferred = new(zone()) DeferredInstanceOfKnownGlobal(this, instr);
 
   Label done, false_result;
-  Register object = ToRegister(instr->InputAt(1));
-  Register temp = ToRegister(instr->TempAt(0));
+  Register object = ToRegister(instr->value());
+  Register temp = ToRegister(instr->temp());
 
   // A Smi is not an instance of anything.
   __ JumpIfSmi(object, &false_result);
@@ -2235,7 +2355,7 @@ void LCodeGen::DoInstanceOfKnownGlobal(LInstanceOfKnownGlobal* instr) {
   // hole value will be patched to the last map/result pair generated by the
   // instanceof stub.
   Label cache_miss;
-  Register map = ToRegister(instr->TempAt(0));
+  Register map = ToRegister(instr->temp());
   __ mov(map, FieldOperand(object, HeapObject::kMapOffset));
   __ bind(deferred->map_check());  // Label for calculating code patching.
   Handle<JSGlobalPropertyCell> cache_cell =
@@ -2286,7 +2406,7 @@ void LCodeGen::DoDeferredInstanceOfKnownGlobal(LInstanceOfKnownGlobal* instr,
   // register which is pushed last by PushSafepointRegisters as top of the
   // stack is used to pass the offset to the location of the map check to
   // the stub.
-  Register temp = ToRegister(instr->TempAt(0));
+  Register temp = ToRegister(instr->temp());
   ASSERT(MacroAssembler::SafepointRegisterStackIndex(temp) == 0);
   __ LoadHeapObject(InstanceofStub::right(), instr->function());
   static const int kAdditionalDelta = 13;
@@ -2453,7 +2573,7 @@ void LCodeGen::DoStoreContextSlot(LStoreContextSlot* instr) {
     HType type = instr->hydrogen()->value()->type();
     SmiCheck check_needed =
         type.IsHeapObject() ? OMIT_SMI_CHECK : INLINE_SMI_CHECK;
-    Register temp = ToRegister(instr->TempAt(0));
+    Register temp = ToRegister(instr->temp());
     int offset = Context::SlotOffset(instr->slot_index());
     __ RecordWriteContextSlot(context,
                               offset,
@@ -2618,7 +2738,7 @@ void LCodeGen::DoLoadNamedGeneric(LLoadNamedGeneric* instr) {
 
 void LCodeGen::DoLoadFunctionPrototype(LLoadFunctionPrototype* instr) {
   Register function = ToRegister(instr->function());
-  Register temp = ToRegister(instr->TempAt(0));
+  Register temp = ToRegister(instr->temp());
   Register result = ToRegister(instr->result());
 
   // Check that the function really is a function.
@@ -2660,7 +2780,7 @@ void LCodeGen::DoLoadFunctionPrototype(LLoadFunctionPrototype* instr) {
 
 void LCodeGen::DoLoadElements(LLoadElements* instr) {
   Register result = ToRegister(instr->result());
-  Register input = ToRegister(instr->InputAt(0));
+  Register input = ToRegister(instr->object());
   __ mov(result, FieldOperand(input, JSObject::kElementsOffset));
   if (FLAG_debug_code) {
     Label done, ok, fail;
@@ -2696,7 +2816,7 @@ void LCodeGen::DoLoadElements(LLoadElements* instr) {
 void LCodeGen::DoLoadExternalArrayPointer(
     LLoadExternalArrayPointer* instr) {
   Register result = ToRegister(instr->result());
-  Register input = ToRegister(instr->InputAt(0));
+  Register input = ToRegister(instr->object());
   __ mov(result, FieldOperand(input,
                               ExternalArray::kExternalPointerOffset));
 }
@@ -2707,43 +2827,78 @@ void LCodeGen::DoAccessArgumentsAt(LAccessArgumentsAt* instr) {
   Register length = ToRegister(instr->length());
   Operand index = ToOperand(instr->index());
   Register result = ToRegister(instr->result());
-
-  __ sub(length, index);
-  DeoptimizeIf(below_equal, instr->environment());
-
   // There are two words between the frame pointer and the last argument.
   // Subtracting from length accounts for one of them add one more.
+  __ sub(length, index);
   __ mov(result, Operand(arguments, length, times_4, kPointerSize));
 }
 
 
-void LCodeGen::DoLoadKeyedFastElement(LLoadKeyedFastElement* instr) {
-  Register result = ToRegister(instr->result());
-
-  // Load the result.
-  __ mov(result,
-         BuildFastArrayOperand(instr->elements(),
-                               instr->key(),
-                               instr->hydrogen()->key()->representation(),
-                               FAST_ELEMENTS,
-                               FixedArray::kHeaderSize - kHeapObjectTag,
-                               instr->additional_index()));
-
-  // Check for the hole value.
-  if (instr->hydrogen()->RequiresHoleCheck()) {
-    if (IsFastSmiElementsKind(instr->hydrogen()->elements_kind())) {
-      __ test(result, Immediate(kSmiTagMask));
-      DeoptimizeIf(not_equal, instr->environment());
-    } else {
-      __ cmp(result, factory()->the_hole_value());
-      DeoptimizeIf(equal, instr->environment());
+void LCodeGen::DoLoadKeyedExternalArray(LLoadKeyed* instr) {
+  ElementsKind elements_kind = instr->elements_kind();
+  LOperand* key = instr->key();
+  if (!key->IsConstantOperand() &&
+      ExternalArrayOpRequiresTemp(instr->hydrogen()->key()->representation(),
+                                  elements_kind)) {
+    __ SmiUntag(ToRegister(key));
+  }
+  Operand operand(BuildFastArrayOperand(
+      instr->elements(),
+      key,
+      instr->hydrogen()->key()->representation(),
+      elements_kind,
+      0,
+      instr->additional_index()));
+  if (elements_kind == EXTERNAL_FLOAT_ELEMENTS) {
+    XMMRegister result(ToDoubleRegister(instr->result()));
+    __ movss(result, operand);
+    __ cvtss2sd(result, result);
+  } else if (elements_kind == EXTERNAL_DOUBLE_ELEMENTS) {
+    __ movdbl(ToDoubleRegister(instr->result()), operand);
+  } else {
+    Register result(ToRegister(instr->result()));
+    switch (elements_kind) {
+      case EXTERNAL_BYTE_ELEMENTS:
+        __ movsx_b(result, operand);
+        break;
+      case EXTERNAL_PIXEL_ELEMENTS:
+      case EXTERNAL_UNSIGNED_BYTE_ELEMENTS:
+        __ movzx_b(result, operand);
+        break;
+      case EXTERNAL_SHORT_ELEMENTS:
+        __ movsx_w(result, operand);
+        break;
+      case EXTERNAL_UNSIGNED_SHORT_ELEMENTS:
+        __ movzx_w(result, operand);
+        break;
+      case EXTERNAL_INT_ELEMENTS:
+        __ mov(result, operand);
+        break;
+      case EXTERNAL_UNSIGNED_INT_ELEMENTS:
+        __ mov(result, operand);
+        if (!instr->hydrogen()->CheckFlag(HInstruction::kUint32)) {
+          __ test(result, Operand(result));
+          DeoptimizeIf(negative, instr->environment());
+        }
+        break;
+      case EXTERNAL_FLOAT_ELEMENTS:
+      case EXTERNAL_DOUBLE_ELEMENTS:
+      case FAST_SMI_ELEMENTS:
+      case FAST_ELEMENTS:
+      case FAST_DOUBLE_ELEMENTS:
+      case FAST_HOLEY_SMI_ELEMENTS:
+      case FAST_HOLEY_ELEMENTS:
+      case FAST_HOLEY_DOUBLE_ELEMENTS:
+      case DICTIONARY_ELEMENTS:
+      case NON_STRICT_ARGUMENTS_ELEMENTS:
+        UNREACHABLE();
+        break;
     }
   }
 }
 
 
-void LCodeGen::DoLoadKeyedFastDoubleElement(
-    LLoadKeyedFastDoubleElement* instr) {
+void LCodeGen::DoLoadKeyedFixedDoubleArray(LLoadKeyed* instr) {
   XMMRegister result = ToDoubleRegister(instr->result());
 
   if (instr->hydrogen()->RequiresHoleCheck()) {
@@ -2770,6 +2925,42 @@ void LCodeGen::DoLoadKeyedFastDoubleElement(
 }
 
 
+void LCodeGen::DoLoadKeyedFixedArray(LLoadKeyed* instr) {
+  Register result = ToRegister(instr->result());
+
+  // Load the result.
+  __ mov(result,
+         BuildFastArrayOperand(instr->elements(),
+                               instr->key(),
+                               instr->hydrogen()->key()->representation(),
+                               FAST_ELEMENTS,
+                               FixedArray::kHeaderSize - kHeapObjectTag,
+                               instr->additional_index()));
+
+  // Check for the hole value.
+  if (instr->hydrogen()->RequiresHoleCheck()) {
+    if (IsFastSmiElementsKind(instr->hydrogen()->elements_kind())) {
+      __ test(result, Immediate(kSmiTagMask));
+      DeoptimizeIf(not_equal, instr->environment());
+    } else {
+      __ cmp(result, factory()->the_hole_value());
+      DeoptimizeIf(equal, instr->environment());
+    }
+  }
+}
+
+
+void LCodeGen::DoLoadKeyed(LLoadKeyed* instr) {
+  if (instr->is_external()) {
+    DoLoadKeyedExternalArray(instr);
+  } else if (instr->hydrogen()->representation().IsDouble()) {
+    DoLoadKeyedFixedDoubleArray(instr);
+  } else {
+    DoLoadKeyedFixedArray(instr);
+  }
+}
+
+
 Operand LCodeGen::BuildFastArrayOperand(
     LOperand* elements_pointer,
     LOperand* key,
@@ -2779,7 +2970,7 @@ Operand LCodeGen::BuildFastArrayOperand(
     uint32_t additional_index) {
   Register elements_pointer_reg = ToRegister(elements_pointer);
   int shift_size = ElementsKindToShiftSize(elements_kind);
-  // Even though the HLoad/StoreKeyedFastElement instructions force the input
+  // Even though the HLoad/StoreKeyed instructions force the input
   // representation for the key to be an integer, the input gets replaced during
   // bound check elimination with the index argument to the bounds check, which
   // can be tagged, so that case must be handled here, too.
@@ -2804,71 +2995,6 @@ Operand LCodeGen::BuildFastArrayOperand(
 }
 
 
-void LCodeGen::DoLoadKeyedSpecializedArrayElement(
-    LLoadKeyedSpecializedArrayElement* instr) {
-  ElementsKind elements_kind = instr->elements_kind();
-  LOperand* key = instr->key();
-  if (!key->IsConstantOperand() &&
-      ExternalArrayOpRequiresTemp(instr->hydrogen()->key()->representation(),
-                                  elements_kind)) {
-    __ SmiUntag(ToRegister(key));
-  }
-  Operand operand(BuildFastArrayOperand(
-      instr->external_pointer(),
-      key,
-      instr->hydrogen()->key()->representation(),
-      elements_kind,
-      0,
-      instr->additional_index()));
-  if (elements_kind == EXTERNAL_FLOAT_ELEMENTS) {
-    XMMRegister result(ToDoubleRegister(instr->result()));
-    __ movss(result, operand);
-    __ cvtss2sd(result, result);
-  } else if (elements_kind == EXTERNAL_DOUBLE_ELEMENTS) {
-    __ movdbl(ToDoubleRegister(instr->result()), operand);
-  } else {
-    Register result(ToRegister(instr->result()));
-    switch (elements_kind) {
-      case EXTERNAL_BYTE_ELEMENTS:
-        __ movsx_b(result, operand);
-        break;
-      case EXTERNAL_PIXEL_ELEMENTS:
-      case EXTERNAL_UNSIGNED_BYTE_ELEMENTS:
-        __ movzx_b(result, operand);
-        break;
-      case EXTERNAL_SHORT_ELEMENTS:
-        __ movsx_w(result, operand);
-        break;
-      case EXTERNAL_UNSIGNED_SHORT_ELEMENTS:
-        __ movzx_w(result, operand);
-        break;
-      case EXTERNAL_INT_ELEMENTS:
-        __ mov(result, operand);
-        break;
-      case EXTERNAL_UNSIGNED_INT_ELEMENTS:
-        __ mov(result, operand);
-        if (!instr->hydrogen()->CheckFlag(HInstruction::kUint32)) {
-          __ test(result, Operand(result));
-          DeoptimizeIf(negative, instr->environment());
-        }
-        break;
-      case EXTERNAL_FLOAT_ELEMENTS:
-      case EXTERNAL_DOUBLE_ELEMENTS:
-      case FAST_SMI_ELEMENTS:
-      case FAST_ELEMENTS:
-      case FAST_DOUBLE_ELEMENTS:
-      case FAST_HOLEY_SMI_ELEMENTS:
-      case FAST_HOLEY_ELEMENTS:
-      case FAST_HOLEY_DOUBLE_ELEMENTS:
-      case DICTIONARY_ELEMENTS:
-      case NON_STRICT_ARGUMENTS_ELEMENTS:
-        UNREACHABLE();
-        break;
-    }
-  }
-}
-
-
 void LCodeGen::DoLoadKeyedGeneric(LLoadKeyedGeneric* instr) {
   ASSERT(ToRegister(instr->context()).is(esi));
   ASSERT(ToRegister(instr->object()).is(edx));
@@ -2909,7 +3035,7 @@ void LCodeGen::DoArgumentsElements(LArgumentsElements* instr) {
 
 
 void LCodeGen::DoArgumentsLength(LArgumentsLength* instr) {
-  Operand elem = ToOperand(instr->InputAt(0));
+  Operand elem = ToOperand(instr->elements());
   Register result = ToRegister(instr->result());
 
   Label done;
@@ -2933,7 +3059,7 @@ void LCodeGen::DoArgumentsLength(LArgumentsLength* instr) {
 void LCodeGen::DoWrapReceiver(LWrapReceiver* instr) {
   Register receiver = ToRegister(instr->receiver());
   Register function = ToRegister(instr->function());
-  Register scratch = ToRegister(instr->TempAt(0));
+  Register scratch = ToRegister(instr->temp());
 
   // If the receiver is null or undefined, we have to pass the global
   // object as a receiver to normal functions. Values have to be
@@ -3021,7 +3147,7 @@ void LCodeGen::DoApplyArguments(LApplyArguments* instr) {
 
 
 void LCodeGen::DoPushArgument(LPushArgument* instr) {
-  LOperand* argument = instr->InputAt(0);
+  LOperand* argument = instr->value();
   EmitPushTaggedOperand(argument);
 }
 
@@ -3052,7 +3178,7 @@ void LCodeGen::DoOuterContext(LOuterContext* instr) {
 
 
 void LCodeGen::DoDeclareGlobals(LDeclareGlobals* instr) {
-  ASSERT(ToRegister(instr->InputAt(0)).is(esi));
+  ASSERT(ToRegister(instr->context()).is(esi));
   __ push(esi);  // The context is the first argument.
   __ push(Immediate(instr->hydrogen()->pairs()));
   __ push(Immediate(Smi::FromInt(instr->hydrogen()->flags())));
@@ -3385,11 +3511,11 @@ void LCodeGen::DoPower(LPower* instr) {
   Representation exponent_type = instr->hydrogen()->right()->representation();
   // Having marked this as a call, we can use any registers.
   // Just make sure that the input/output registers are the expected ones.
-  ASSERT(!instr->InputAt(1)->IsDoubleRegister() ||
-         ToDoubleRegister(instr->InputAt(1)).is(xmm1));
-  ASSERT(!instr->InputAt(1)->IsRegister() ||
-         ToRegister(instr->InputAt(1)).is(eax));
-  ASSERT(ToDoubleRegister(instr->InputAt(0)).is(xmm2));
+  ASSERT(!instr->right()->IsDoubleRegister() ||
+         ToDoubleRegister(instr->right()).is(xmm1));
+  ASSERT(!instr->right()->IsRegister() ||
+         ToRegister(instr->right()).is(eax));
+  ASSERT(ToDoubleRegister(instr->left()).is(xmm2));
   ASSERT(ToDoubleRegister(instr->result()).is(xmm3));
 
   if (exponent_type.IsTagged()) {
@@ -3427,7 +3553,7 @@ void LCodeGen::DoRandom(LRandom* instr) {
   // Having marked this instruction as a call we can use any
   // registers.
   ASSERT(ToDoubleRegister(instr->result()).is(xmm1));
-  ASSERT(ToRegister(instr->InputAt(0)).is(eax));
+  ASSERT(ToRegister(instr->global_object()).is(eax));
   // Assert that the register size is indeed the size of each seed.
   static const int kSeedSize = sizeof(uint32_t);
   STATIC_ASSERT(kPointerSize == kSeedSize);
@@ -3521,6 +3647,16 @@ void LCodeGen::DoMathLog(LUnaryMathOperation* instr) {
 }
 
 
+void LCodeGen::DoMathExp(LMathExp* instr) {
+  XMMRegister input = ToDoubleRegister(instr->value());
+  XMMRegister result = ToDoubleRegister(instr->result());
+  Register temp1 = ToRegister(instr->temp1());
+  Register temp2 = ToRegister(instr->temp2());
+
+  MathExpGenerator::EmitMathExp(masm(), input, result, xmm0, temp1, temp2);
+}
+
+
 void LCodeGen::DoMathTan(LUnaryMathOperation* instr) {
   ASSERT(ToDoubleRegister(instr->result()).is(xmm1));
   TranscendentalCacheStub stub(TranscendentalCache::TAN,
@@ -3684,8 +3820,8 @@ void LCodeGen::DoStoreNamedField(LStoreNamedField* instr) {
     if (!instr->hydrogen()->NeedsWriteBarrierForMap()) {
       __ mov(FieldOperand(object, HeapObject::kMapOffset), instr->transition());
     } else {
-      Register temp = ToRegister(instr->TempAt(0));
-      Register temp_map = ToRegister(instr->TempAt(1));
+      Register temp = ToRegister(instr->temp());
+      Register temp_map = ToRegister(instr->temp_map());
       __ mov(temp_map, instr->transition());
       __ mov(FieldOperand(object, HeapObject::kMapOffset), temp_map);
       // Update the write barrier for the map field.
@@ -3706,7 +3842,7 @@ void LCodeGen::DoStoreNamedField(LStoreNamedField* instr) {
   if (instr->is_in_object()) {
     __ mov(FieldOperand(object, offset), value);
     if (instr->hydrogen()->NeedsWriteBarrier()) {
-      Register temp = ToRegister(instr->TempAt(0));
+      Register temp = ToRegister(instr->temp());
       // Update the write barrier for the object for in-object properties.
       __ RecordWriteField(object,
                           offset,
@@ -3717,7 +3853,7 @@ void LCodeGen::DoStoreNamedField(LStoreNamedField* instr) {
                           check_needed);
     }
   } else {
-    Register temp = ToRegister(instr->TempAt(0));
+    Register temp = ToRegister(instr->temp());
     __ mov(temp, FieldOperand(object, JSObject::kPropertiesOffset));
     __ mov(FieldOperand(temp, offset), value);
     if (instr->hydrogen()->NeedsWriteBarrier()) {
@@ -3786,8 +3922,7 @@ void LCodeGen::DoBoundsCheck(LBoundsCheck* instr) {
 }
 
 
-void LCodeGen::DoStoreKeyedSpecializedArrayElement(
-    LStoreKeyedSpecializedArrayElement* instr) {
+void LCodeGen::DoStoreKeyedExternalArray(LStoreKeyed* instr) {
   ElementsKind elements_kind = instr->elements_kind();
   LOperand* key = instr->key();
   if (!key->IsConstantOperand() &&
@@ -3796,7 +3931,7 @@ void LCodeGen::DoStoreKeyedSpecializedArrayElement(
     __ SmiUntag(ToRegister(key));
   }
   Operand operand(BuildFastArrayOperand(
-      instr->external_pointer(),
+      instr->elements(),
       key,
       instr->hydrogen()->key()->representation(),
       elements_kind,
@@ -3840,13 +3975,39 @@ void LCodeGen::DoStoreKeyedSpecializedArrayElement(
 }
 
 
-void LCodeGen::DoStoreKeyedFastElement(LStoreKeyedFastElement* instr) {
+void LCodeGen::DoStoreKeyedFixedDoubleArray(LStoreKeyed* instr) {
+  XMMRegister value = ToDoubleRegister(instr->value());
+
+  if (instr->NeedsCanonicalization()) {
+    Label have_value;
+
+    __ ucomisd(value, value);
+    __ j(parity_odd, &have_value);  // NaN.
+
+    ExternalReference canonical_nan_reference =
+        ExternalReference::address_of_canonical_non_hole_nan();
+    __ movdbl(value, Operand::StaticVariable(canonical_nan_reference));
+    __ bind(&have_value);
+  }
+
+  Operand double_store_operand = BuildFastArrayOperand(
+      instr->elements(),
+      instr->key(),
+      instr->hydrogen()->key()->representation(),
+      FAST_DOUBLE_ELEMENTS,
+      FixedDoubleArray::kHeaderSize - kHeapObjectTag,
+      instr->additional_index());
+  __ movdbl(double_store_operand, value);
+}
+
+
+void LCodeGen::DoStoreKeyedFixedArray(LStoreKeyed* instr) {
   Register value = ToRegister(instr->value());
-  Register elements = ToRegister(instr->object());
+  Register elements = ToRegister(instr->elements());
   Register key = instr->key()->IsRegister() ? ToRegister(instr->key()) : no_reg;
 
   Operand operand = BuildFastArrayOperand(
-      instr->object(),
+      instr->elements(),
       instr->key(),
       instr->hydrogen()->key()->representation(),
       FAST_ELEMENTS,
@@ -3871,30 +4032,15 @@ void LCodeGen::DoStoreKeyedFastElement(LStoreKeyedFastElement* instr) {
 }
 
 
-void LCodeGen::DoStoreKeyedFastDoubleElement(
-    LStoreKeyedFastDoubleElement* instr) {
-  XMMRegister value = ToDoubleRegister(instr->value());
-
-  if (instr->NeedsCanonicalization()) {
-    Label have_value;
-
-    __ ucomisd(value, value);
-    __ j(parity_odd, &have_value);  // NaN.
-
-    ExternalReference canonical_nan_reference =
-        ExternalReference::address_of_canonical_non_hole_nan();
-    __ movdbl(value, Operand::StaticVariable(canonical_nan_reference));
-    __ bind(&have_value);
+void LCodeGen::DoStoreKeyed(LStoreKeyed* instr) {
+  // By cases...external, fast-double, fast
+  if (instr->is_external()) {
+    DoStoreKeyedExternalArray(instr);
+  } else if (instr->hydrogen()->value()->representation().IsDouble()) {
+    DoStoreKeyedFixedDoubleArray(instr);
+  } else {
+    DoStoreKeyedFixedArray(instr);
   }
-
-  Operand double_store_operand = BuildFastArrayOperand(
-      instr->elements(),
-      instr->key(),
-      instr->hydrogen()->key()->representation(),
-      FAST_DOUBLE_ELEMENTS,
-      FixedDoubleArray::kHeaderSize - kHeapObjectTag,
-      instr->additional_index());
-  __ movdbl(double_store_operand, value);
 }
 
 
@@ -3913,7 +4059,7 @@ void LCodeGen::DoStoreKeyedGeneric(LStoreKeyedGeneric* instr) {
 
 void LCodeGen::DoTransitionElementsKind(LTransitionElementsKind* instr) {
   Register object_reg = ToRegister(instr->object());
-  Register new_map_reg = ToRegister(instr->new_map_reg());
+  Register new_map_reg = ToRegister(instr->new_map_temp());
 
   Handle<Map> from_map = instr->original_map();
   Handle<Map> to_map = instr->transitioned_map();
@@ -3933,14 +4079,14 @@ void LCodeGen::DoTransitionElementsKind(LTransitionElementsKind* instr) {
     __ mov(FieldOperand(object_reg, HeapObject::kMapOffset),
            Immediate(map));
     // Write barrier.
-    ASSERT_NE(instr->temp_reg(), NULL);
+    ASSERT_NE(instr->temp(), NULL);
     __ RecordWriteForMap(object_reg, to_map, new_map_reg,
-                         ToRegister(instr->temp_reg()),
+                         ToRegister(instr->temp()),
                          kDontSaveFPRegs);
   } else if (IsFastSmiElementsKind(from_kind) &&
              IsFastDoubleElementsKind(to_kind)) {
     __ mov(new_map_reg, to_map);
-    Register fixed_object_reg = ToRegister(instr->temp_reg());
+    Register fixed_object_reg = ToRegister(instr->temp());
     ASSERT(fixed_object_reg.is(edx));
     ASSERT(new_map_reg.is(ebx));
     __ mov(fixed_object_reg, object_reg);
@@ -3949,7 +4095,7 @@ void LCodeGen::DoTransitionElementsKind(LTransitionElementsKind* instr) {
   } else if (IsFastDoubleElementsKind(from_kind) &&
              IsFastObjectElementsKind(to_kind)) {
     __ mov(new_map_reg, to_map);
-    Register fixed_object_reg = ToRegister(instr->temp_reg());
+    Register fixed_object_reg = ToRegister(instr->temp());
     ASSERT(fixed_object_reg.is(edx));
     ASSERT(new_map_reg.is(ebx));
     __ mov(fixed_object_reg, object_reg);
@@ -4010,9 +4156,7 @@ void LCodeGen::DoDeferredStringCharCodeAt(LStringCharCodeAt* instr) {
   }
   CallRuntimeFromDeferred(Runtime::kStringCharCodeAt, 2,
                           instr, instr->context());
-  if (FLAG_debug_code) {
-    __ AbortIfNotSmi(eax);
-  }
+  __ AssertSmi(eax);
   __ SmiUntag(eax);
   __ StoreToSafepointRegisterSlot(result, eax);
 }
@@ -4082,7 +4226,7 @@ void LCodeGen::DoStringAdd(LStringAdd* instr) {
 
 
 void LCodeGen::DoInteger32ToDouble(LInteger32ToDouble* instr) {
-  LOperand* input = instr->InputAt(0);
+  LOperand* input = instr->value();
   ASSERT(input->IsRegister() || input->IsStackSlot());
   LOperand* output = instr->result();
   ASSERT(output->IsDoubleRegister());
@@ -4091,9 +4235,9 @@ void LCodeGen::DoInteger32ToDouble(LInteger32ToDouble* instr) {
 
 
 void LCodeGen::DoUint32ToDouble(LUint32ToDouble* instr) {
-  LOperand* input = instr->InputAt(0);
+  LOperand* input = instr->value();
   LOperand* output = instr->result();
-  LOperand* temp = instr->TempAt(0);
+  LOperand* temp = instr->temp();
 
   __ LoadUint32(ToDoubleRegister(output),
                 ToRegister(input),
@@ -4107,16 +4251,14 @@ void LCodeGen::DoNumberTagI(LNumberTagI* instr) {
     DeferredNumberTagI(LCodeGen* codegen, LNumberTagI* instr)
         : LDeferredCode(codegen), instr_(instr) { }
     virtual void Generate() {
-      codegen()->DoDeferredNumberTagI(instr_,
-                                      instr_->InputAt(0),
-                                      SIGNED_INT32);
+      codegen()->DoDeferredNumberTagI(instr_, instr_->value(), SIGNED_INT32);
     }
     virtual LInstruction* instr() { return instr_; }
    private:
     LNumberTagI* instr_;
   };
 
-  LOperand* input = instr->InputAt(0);
+  LOperand* input = instr->value();
   ASSERT(input->IsRegister() && input->Equals(instr->result()));
   Register reg = ToRegister(input);
 
@@ -4133,16 +4275,14 @@ void LCodeGen::DoNumberTagU(LNumberTagU* instr) {
     DeferredNumberTagU(LCodeGen* codegen, LNumberTagU* instr)
         : LDeferredCode(codegen), instr_(instr) { }
     virtual void Generate() {
-      codegen()->DoDeferredNumberTagI(instr_,
-                                      instr_->InputAt(0),
-                                      UNSIGNED_INT32);
+      codegen()->DoDeferredNumberTagI(instr_, instr_->value(), UNSIGNED_INT32);
     }
     virtual LInstruction* instr() { return instr_; }
    private:
     LNumberTagU* instr_;
   };
 
-  LOperand* input = instr->InputAt(0);
+  LOperand* input = instr->value();
   ASSERT(input->IsRegister() && input->Equals(instr->result()));
   Register reg = ToRegister(input);
 
@@ -4219,9 +4359,9 @@ void LCodeGen::DoNumberTagD(LNumberTagD* instr) {
     LNumberTagD* instr_;
   };
 
-  XMMRegister input_reg = ToDoubleRegister(instr->InputAt(0));
+  XMMRegister input_reg = ToDoubleRegister(instr->value());
   Register reg = ToRegister(instr->result());
-  Register tmp = ToRegister(instr->TempAt(0));
+  Register tmp = ToRegister(instr->temp());
 
   DeferredNumberTagD* deferred = new(zone()) DeferredNumberTagD(this, instr);
   if (FLAG_inline_new) {
@@ -4256,7 +4396,7 @@ void LCodeGen::DoDeferredNumberTagD(LNumberTagD* instr) {
 
 
 void LCodeGen::DoSmiTag(LSmiTag* instr) {
-  LOperand* input = instr->InputAt(0);
+  LOperand* input = instr->value();
   ASSERT(input->IsRegister() && input->Equals(instr->result()));
   ASSERT(!instr->hydrogen_value()->CheckFlag(HValue::kCanOverflow));
   __ SmiTag(ToRegister(input));
@@ -4264,15 +4404,13 @@ void LCodeGen::DoSmiTag(LSmiTag* instr) {
 
 
 void LCodeGen::DoSmiUntag(LSmiUntag* instr) {
-  LOperand* input = instr->InputAt(0);
+  LOperand* input = instr->value();
   ASSERT(input->IsRegister() && input->Equals(instr->result()));
   if (instr->needs_check()) {
     __ test(ToRegister(input), Immediate(kSmiTagMask));
     DeoptimizeIf(not_zero, instr->environment());
   } else {
-    if (FLAG_debug_code) {
-      __ AbortIfNotSmi(ToRegister(input));
-    }
+    __ AssertSmi(ToRegister(input));
   }
   __ SmiUntag(ToRegister(input));
 }
@@ -4333,7 +4471,7 @@ void LCodeGen::EmitNumberUntagD(Register input_reg,
 
 void LCodeGen::DoDeferredTaggedToI(LTaggedToI* instr) {
   Label done, heap_number;
-  Register input_reg = ToRegister(instr->InputAt(0));
+  Register input_reg = ToRegister(instr->value());
 
   // Heap number map check.
   __ cmp(FieldOperand(input_reg, HeapObject::kMapOffset),
@@ -4344,6 +4482,7 @@ void LCodeGen::DoDeferredTaggedToI(LTaggedToI* instr) {
     // Check for undefined. Undefined is converted to zero for truncating
     // conversions.
     __ cmp(input_reg, factory()->undefined_value());
+    __ RecordComment("Deferred TaggedToI: cannot truncate");
     DeoptimizeIf(not_equal, instr->environment());
     __ mov(input_reg, 0);
     __ jmp(&done, Label::kNear);
@@ -4364,6 +4503,7 @@ void LCodeGen::DoDeferredTaggedToI(LTaggedToI* instr) {
       __ j(less, &convert, Label::kNear);
       // Pop FPU stack before deoptimizing.
       __ fstp(0);
+      __ RecordComment("Deferred TaggedToI: exponent too big");
       DeoptimizeIf(no_condition, instr->environment());
 
       // Reserve space for 64 bit answer.
@@ -4374,7 +4514,7 @@ void LCodeGen::DoDeferredTaggedToI(LTaggedToI* instr) {
       __ mov(input_reg, Operand(esp, 0));  // Low word of answer is the result.
       __ add(Operand(esp), Immediate(kDoubleSize));
     } else {
-      XMMRegister xmm_temp = ToDoubleRegister(instr->TempAt(0));
+      XMMRegister xmm_temp = ToDoubleRegister(instr->temp());
       __ movdbl(xmm0, FieldOperand(input_reg, HeapNumber::kValueOffset));
       __ cvttsd2si(input_reg, Operand(xmm0));
       __ cmp(input_reg, 0x80000000u);
@@ -4389,20 +4529,24 @@ void LCodeGen::DoDeferredTaggedToI(LTaggedToI* instr) {
     }
   } else {
     // Deoptimize if we don't have a heap number.
+    __ RecordComment("Deferred TaggedToI: not a heap number");
     DeoptimizeIf(not_equal, instr->environment());
 
-    XMMRegister xmm_temp = ToDoubleRegister(instr->TempAt(0));
+    XMMRegister xmm_temp = ToDoubleRegister(instr->temp());
     __ movdbl(xmm0, FieldOperand(input_reg, HeapNumber::kValueOffset));
     __ cvttsd2si(input_reg, Operand(xmm0));
     __ cvtsi2sd(xmm_temp, Operand(input_reg));
     __ ucomisd(xmm0, xmm_temp);
+    __ RecordComment("Deferred TaggedToI: lost precision");
     DeoptimizeIf(not_equal, instr->environment());
+    __ RecordComment("Deferred TaggedToI: NaN");
     DeoptimizeIf(parity_even, instr->environment());  // NaN.
     if (instr->hydrogen()->CheckFlag(HValue::kBailoutOnMinusZero)) {
       __ test(input_reg, Operand(input_reg));
       __ j(not_zero, &done);
       __ movmskpd(input_reg, xmm0);
       __ and_(input_reg, 1);
+      __ RecordComment("Deferred TaggedToI: minus zero");
       DeoptimizeIf(not_zero, instr->environment());
     }
   }
@@ -4421,7 +4565,7 @@ void LCodeGen::DoTaggedToI(LTaggedToI* instr) {
     LTaggedToI* instr_;
   };
 
-  LOperand* input = instr->InputAt(0);
+  LOperand* input = instr->value();
   ASSERT(input->IsRegister());
   ASSERT(input->Equals(instr->result()));
 
@@ -4440,9 +4584,9 @@ void LCodeGen::DoTaggedToI(LTaggedToI* instr) {
 
 
 void LCodeGen::DoNumberUntagD(LNumberUntagD* instr) {
-  LOperand* input = instr->InputAt(0);
+  LOperand* input = instr->value();
   ASSERT(input->IsRegister());
-  LOperand* temp = instr->TempAt(0);
+  LOperand* temp = instr->temp();
   ASSERT(temp == NULL || temp->IsRegister());
   LOperand* result = instr->result();
   ASSERT(result->IsDoubleRegister());
@@ -4464,7 +4608,7 @@ void LCodeGen::DoNumberUntagD(LNumberUntagD* instr) {
 
 
 void LCodeGen::DoDoubleToI(LDoubleToI* instr) {
-  LOperand* input = instr->InputAt(0);
+  LOperand* input = instr->value();
   ASSERT(input->IsDoubleRegister());
   LOperand* result = instr->result();
   ASSERT(result->IsRegister());
@@ -4502,7 +4646,7 @@ void LCodeGen::DoDoubleToI(LDoubleToI* instr) {
       __ bind(&done);
     } else {
       Label done;
-      Register temp_reg = ToRegister(instr->TempAt(0));
+      Register temp_reg = ToRegister(instr->temp());
       XMMRegister xmm_scratch = xmm0;
 
       // If cvttsd2si succeeded, we're done. Otherwise, we attempt
@@ -4581,22 +4725,22 @@ void LCodeGen::DoDoubleToI(LDoubleToI* instr) {
 
 
 void LCodeGen::DoCheckSmi(LCheckSmi* instr) {
-  LOperand* input = instr->InputAt(0);
+  LOperand* input = instr->value();
   __ test(ToOperand(input), Immediate(kSmiTagMask));
   DeoptimizeIf(not_zero, instr->environment());
 }
 
 
 void LCodeGen::DoCheckNonSmi(LCheckNonSmi* instr) {
-  LOperand* input = instr->InputAt(0);
+  LOperand* input = instr->value();
   __ test(ToOperand(input), Immediate(kSmiTagMask));
   DeoptimizeIf(zero, instr->environment());
 }
 
 
 void LCodeGen::DoCheckInstanceType(LCheckInstanceType* instr) {
-  Register input = ToRegister(instr->InputAt(0));
-  Register temp = ToRegister(instr->TempAt(0));
+  Register input = ToRegister(instr->value());
+  Register temp = ToRegister(instr->temp());
 
   __ mov(temp, FieldOperand(input, HeapObject::kMapOffset));
 
@@ -4666,7 +4810,7 @@ void LCodeGen::DoCheckMapCommon(Register reg,
 
 
 void LCodeGen::DoCheckMaps(LCheckMaps* instr) {
-  LOperand* input = instr->InputAt(0);
+  LOperand* input = instr->value();
   ASSERT(input->IsRegister());
   Register reg = ToRegister(input);
 
@@ -4732,7 +4876,8 @@ void LCodeGen::DoClampTToUint8(LClampTToUint8* instr) {
 
 
 void LCodeGen::DoCheckPrototypeMaps(LCheckPrototypeMaps* instr) {
-  Register reg = ToRegister(instr->TempAt(0));
+  ASSERT(instr->temp()->Equals(instr->result()));
+  Register reg = ToRegister(instr->temp());
 
   Handle<JSObject> holder = instr->holder();
   Handle<JSObject> current_prototype = instr->prototype();
@@ -4772,7 +4917,7 @@ void LCodeGen::DoAllocateObject(LAllocateObject* instr) {
       new(zone()) DeferredAllocateObject(this, instr);
 
   Register result = ToRegister(instr->result());
-  Register scratch = ToRegister(instr->TempAt(0));
+  Register scratch = ToRegister(instr->temp());
   Handle<JSFunction> constructor = instr->hydrogen()->constructor();
   Handle<Map> initial_map(constructor->initial_map());
   int instance_size = initial_map->instance_size();
@@ -4805,7 +4950,7 @@ void LCodeGen::DoAllocateObject(LAllocateObject* instr) {
   __ mov(map, FieldOperand(scratch, JSFunction::kPrototypeOrInitialMapOffset));
 
   if (FLAG_debug_code) {
-    __ AbortIfSmi(map);
+    __ AssertNotSmi(map);
     __ cmpb(FieldOperand(map, Map::kInstanceSizeOffset),
             instance_size >> kPointerSizeLog2);
     __ Assert(equal, "Unexpected instance size");
@@ -5091,7 +5236,7 @@ void LCodeGen::DoObjectLiteral(LObjectLiteral* instr) {
 
 
 void LCodeGen::DoToFastProperties(LToFastProperties* instr) {
-  ASSERT(ToRegister(instr->InputAt(0)).is(eax));
+  ASSERT(ToRegister(instr->value()).is(eax));
   __ push(eax);
   CallRuntime(Runtime::kToFastProperties, 1, instr);
 }
@@ -5171,14 +5316,14 @@ void LCodeGen::DoFunctionLiteral(LFunctionLiteral* instr) {
 
 
 void LCodeGen::DoTypeof(LTypeof* instr) {
-  LOperand* input = instr->InputAt(1);
+  LOperand* input = instr->value();
   EmitPushTaggedOperand(input);
   CallRuntime(Runtime::kTypeof, 1, instr);
 }
 
 
 void LCodeGen::DoTypeofIsAndBranch(LTypeofIsAndBranch* instr) {
-  Register input = ToRegister(instr->InputAt(0));
+  Register input = ToRegister(instr->value());
   int true_block = chunk_->LookupDestination(instr->true_block_id());
   int false_block = chunk_->LookupDestination(instr->false_block_id());
   Label* true_label = chunk_->GetAssemblyLabel(true_block);
@@ -5262,7 +5407,7 @@ Condition LCodeGen::EmitTypeofIs(Label* true_label,
 
 
 void LCodeGen::DoIsConstructCallAndBranch(LIsConstructCallAndBranch* instr) {
-  Register temp = ToRegister(instr->TempAt(0));
+  Register temp = ToRegister(instr->temp());
   int true_block = chunk_->LookupDestination(instr->true_block_id());
   int false_block = chunk_->LookupDestination(instr->false_block_id());
 
diff --git a/deps/v8/src/ia32/lithium-codegen-ia32.h b/deps/v8/src/ia32/lithium-codegen-ia32.h
index 9058ede0eb..44ddaffcd4 100644
--- a/deps/v8/src/ia32/lithium-codegen-ia32.h
+++ b/deps/v8/src/ia32/lithium-codegen-ia32.h
@@ -129,7 +129,10 @@ class LCodeGen BASE_EMBEDDED {
   void DoGap(LGap* instr);
 
   // Emit frame translation commands for an environment.
-  void WriteTranslation(LEnvironment* environment, Translation* translation);
+  void WriteTranslation(LEnvironment* environment,
+                        Translation* translation,
+                        int* arguments_index,
+                        int* arguments_count);
 
   void EnsureRelocSpaceForDeoptimization();
 
@@ -239,7 +242,9 @@ class LCodeGen BASE_EMBEDDED {
   void AddToTranslation(Translation* translation,
                         LOperand* op,
                         bool is_tagged,
-                        bool is_uint32);
+                        bool is_uint32,
+                        int arguments_index,
+                        int arguments_count);
   void PopulateDeoptimizationData(Handle<Code> code);
   int DefineDeoptimizationLiteral(Handle<Object> literal);
 
@@ -335,6 +340,12 @@ class LCodeGen BASE_EMBEDDED {
                     int* offset);
 
   void EnsureSpaceForLazyDeopt();
+  void DoLoadKeyedExternalArray(LLoadKeyed* instr);
+  void DoLoadKeyedFixedDoubleArray(LLoadKeyed* instr);
+  void DoLoadKeyedFixedArray(LLoadKeyed* instr);
+  void DoStoreKeyedExternalArray(LStoreKeyed* instr);
+  void DoStoreKeyedFixedDoubleArray(LStoreKeyed* instr);
+  void DoStoreKeyedFixedArray(LStoreKeyed* instr);
 
   // Emits code for pushing either a tagged constant, a (non-double)
   // register, or a stack slot operand.
diff --git a/deps/v8/src/ia32/lithium-ia32.cc b/deps/v8/src/ia32/lithium-ia32.cc
index f576e37e4f..d7ac7a8b14 100644
--- a/deps/v8/src/ia32/lithium-ia32.cc
+++ b/deps/v8/src/ia32/lithium-ia32.cc
@@ -179,6 +179,7 @@ const char* LArithmeticT::Mnemonic() const {
     case Token::BIT_AND: return "bit-and-t";
     case Token::BIT_OR: return "bit-or-t";
     case Token::BIT_XOR: return "bit-xor-t";
+    case Token::ROR: return "ror-t";
     case Token::SHL: return "sal-t";
     case Token::SAR: return "sar-t";
     case Token::SHR: return "shr-t";
@@ -196,22 +197,22 @@ void LGoto::PrintDataTo(StringStream* stream) {
 
 void LBranch::PrintDataTo(StringStream* stream) {
   stream->Add("B%d | B%d on ", true_block_id(), false_block_id());
-  InputAt(0)->PrintTo(stream);
+  value()->PrintTo(stream);
 }
 
 
 void LCmpIDAndBranch::PrintDataTo(StringStream* stream) {
   stream->Add("if ");
-  InputAt(0)->PrintTo(stream);
+  left()->PrintTo(stream);
   stream->Add(" %s ", Token::String(op()));
-  InputAt(1)->PrintTo(stream);
+  right()->PrintTo(stream);
   stream->Add(" then B%d else B%d", true_block_id(), false_block_id());
 }
 
 
 void LIsNilAndBranch::PrintDataTo(StringStream* stream) {
   stream->Add("if ");
-  InputAt(0)->PrintTo(stream);
+  value()->PrintTo(stream);
   stream->Add(kind() == kStrictEquality ? " === " : " == ");
   stream->Add(nil() == kNullValue ? "null" : "undefined");
   stream->Add(" then B%d else B%d", true_block_id(), false_block_id());
@@ -220,57 +221,57 @@ void LIsNilAndBranch::PrintDataTo(StringStream* stream) {
 
 void LIsObjectAndBranch::PrintDataTo(StringStream* stream) {
   stream->Add("if is_object(");
-  InputAt(0)->PrintTo(stream);
+  value()->PrintTo(stream);
   stream->Add(") then B%d else B%d", true_block_id(), false_block_id());
 }
 
 
 void LIsStringAndBranch::PrintDataTo(StringStream* stream) {
   stream->Add("if is_string(");
-  InputAt(0)->PrintTo(stream);
+  value()->PrintTo(stream);
   stream->Add(") then B%d else B%d", true_block_id(), false_block_id());
 }
 
 
 void LIsSmiAndBranch::PrintDataTo(StringStream* stream) {
   stream->Add("if is_smi(");
-  InputAt(0)->PrintTo(stream);
+  value()->PrintTo(stream);
   stream->Add(") then B%d else B%d", true_block_id(), false_block_id());
 }
 
 
 void LIsUndetectableAndBranch::PrintDataTo(StringStream* stream) {
   stream->Add("if is_undetectable(");
-  InputAt(0)->PrintTo(stream);
+  value()->PrintTo(stream);
   stream->Add(") then B%d else B%d", true_block_id(), false_block_id());
 }
 
 
 void LStringCompareAndBranch::PrintDataTo(StringStream* stream) {
   stream->Add("if string_compare(");
-  InputAt(1)->PrintTo(stream);
-  InputAt(2)->PrintTo(stream);
+  left()->PrintTo(stream);
+  right()->PrintTo(stream);
   stream->Add(") then B%d else B%d", true_block_id(), false_block_id());
 }
 
 
 void LHasInstanceTypeAndBranch::PrintDataTo(StringStream* stream) {
   stream->Add("if has_instance_type(");
-  InputAt(0)->PrintTo(stream);
+  value()->PrintTo(stream);
   stream->Add(") then B%d else B%d", true_block_id(), false_block_id());
 }
 
 
 void LHasCachedArrayIndexAndBranch::PrintDataTo(StringStream* stream) {
   stream->Add("if has_cached_array_index(");
-  InputAt(0)->PrintTo(stream);
+  value()->PrintTo(stream);
   stream->Add(") then B%d else B%d", true_block_id(), false_block_id());
 }
 
 
 void LClassOfTestAndBranch::PrintDataTo(StringStream* stream) {
   stream->Add("if class_of_test(");
-  InputAt(0)->PrintTo(stream);
+  value()->PrintTo(stream);
   stream->Add(", \"%o\") then B%d else B%d",
               *hydrogen()->class_name(),
               true_block_id(),
@@ -280,7 +281,7 @@ void LClassOfTestAndBranch::PrintDataTo(StringStream* stream) {
 
 void LTypeofIsAndBranch::PrintDataTo(StringStream* stream) {
   stream->Add("if typeof ");
-  InputAt(0)->PrintTo(stream);
+  value()->PrintTo(stream);
   stream->Add(" == \"%s\" then B%d else B%d",
               *hydrogen()->type_literal()->ToCString(),
               true_block_id(), false_block_id());
@@ -294,34 +295,39 @@ void LCallConstantFunction::PrintDataTo(StringStream* stream) {
 
 void LUnaryMathOperation::PrintDataTo(StringStream* stream) {
   stream->Add("/%s ", hydrogen()->OpName());
-  InputAt(0)->PrintTo(stream);
+  value()->PrintTo(stream);
+}
+
+
+void LMathExp::PrintDataTo(StringStream* stream) {
+  value()->PrintTo(stream);
 }
 
 
 void LMathPowHalf::PrintDataTo(StringStream* stream) {
   stream->Add("/pow_half ");
-  InputAt(0)->PrintTo(stream);
+  value()->PrintTo(stream);
 }
 
 
 void LLoadContextSlot::PrintDataTo(StringStream* stream) {
-  InputAt(0)->PrintTo(stream);
+  context()->PrintTo(stream);
   stream->Add("[%d]", slot_index());
 }
 
 
 void LStoreContextSlot::PrintDataTo(StringStream* stream) {
-  InputAt(0)->PrintTo(stream);
+  context()->PrintTo(stream);
   stream->Add("[%d] <- ", slot_index());
-  InputAt(1)->PrintTo(stream);
+  value()->PrintTo(stream);
 }
 
 
 void LInvokeFunction::PrintDataTo(StringStream* stream) {
   stream->Add("= ");
-  InputAt(0)->PrintTo(stream);
+  context()->PrintTo(stream);
   stream->Add(" ");
-  InputAt(1)->PrintTo(stream);
+  function()->PrintTo(stream);
   stream->Add(" #%d / ", arity());
 }
 
@@ -350,7 +356,9 @@ void LCallKnownGlobal::PrintDataTo(StringStream* stream) {
 
 void LCallNew::PrintDataTo(StringStream* stream) {
   stream->Add("= ");
-  InputAt(0)->PrintTo(stream);
+  context()->PrintTo(stream);
+  stream->Add(" ");
+  constructor()->PrintTo(stream);
   stream->Add(" #%d / ", arity());
 }
 
@@ -405,20 +413,27 @@ void LStoreNamedGeneric::PrintDataTo(StringStream* stream) {
 }
 
 
-void LStoreKeyedFastElement::PrintDataTo(StringStream* stream) {
-  object()->PrintTo(stream);
+void LLoadKeyed::PrintDataTo(StringStream* stream) {
+  elements()->PrintTo(stream);
   stream->Add("[");
   key()->PrintTo(stream);
-  stream->Add("] <- ");
-  value()->PrintTo(stream);
+  if (hydrogen()->IsDehoisted()) {
+    stream->Add(" + %d]", additional_index());
+  } else {
+    stream->Add("]");
+  }
 }
 
 
-void LStoreKeyedFastDoubleElement::PrintDataTo(StringStream* stream) {
+void LStoreKeyed::PrintDataTo(StringStream* stream) {
   elements()->PrintTo(stream);
   stream->Add("[");
   key()->PrintTo(stream);
-  stream->Add("] <- ");
+  if (hydrogen()->IsDehoisted()) {
+    stream->Add(" + %d] <-", additional_index());
+  } else {
+    stream->Add("] <- ");
+  }
   value()->PrintTo(stream);
 }
 
@@ -886,6 +901,7 @@ LEnvironment* LChunkBuilder::CreateEnvironment(
                                argument_count_,
                                value_count,
                                outer,
+                               hydrogen_env->entry(),
                                zone());
   int argument_index = *argument_index_accumulator;
   for (int i = 0; i < value_count; ++i) {
@@ -1076,6 +1092,14 @@ LInstruction* LChunkBuilder::DoUnaryMathOperation(HUnaryMathOperation* instr) {
     LUnaryMathOperation* result = new(zone()) LUnaryMathOperation(context,
                                                                   input);
     return DefineSameAsFirst(result);
+  } else if (op == kMathExp) {
+    ASSERT(instr->representation().IsDouble());
+    ASSERT(instr->value()->representation().IsDouble());
+    LOperand* value = UseTempRegister(instr->value());
+    LOperand* temp1 = TempRegister();
+    LOperand* temp2 = TempRegister();
+    LMathExp* result = new(zone()) LMathExp(value, temp1, temp2);
+    return DefineAsRegister(result);
   } else if (op == kMathSin || op == kMathCos || op == kMathTan) {
     LOperand* context = UseFixed(instr->context(), esi);
     LOperand* input = UseFixedDouble(instr->value(), xmm1);
@@ -1166,6 +1190,11 @@ LInstruction* LChunkBuilder::DoCallRuntime(HCallRuntime* instr) {
 }
 
 
+LInstruction* LChunkBuilder::DoRor(HRor* instr) {
+  return DoShift(Token::ROR, instr);
+}
+
+
 LInstruction* LChunkBuilder::DoShr(HShr* instr) {
   return DoShift(Token::SHR, instr);
 }
@@ -1218,6 +1247,13 @@ LInstruction* LChunkBuilder::DoDiv(HDiv* instr) {
   if (instr->representation().IsDouble()) {
     return DoArithmeticD(Token::DIV, instr);
   } else if (instr->representation().IsInteger32()) {
+    if (instr->HasPowerOf2Divisor()) {
+      ASSERT(!instr->CheckFlag(HValue::kCanBeDivByZero));
+      LOperand* value = UseRegisterAtStart(instr->left());
+      LDivI* div =
+          new(zone()) LDivI(value, UseOrConstant(instr->right()), NULL);
+      return AssignEnvironment(DefineSameAsFirst(div));
+    }
     // The temporary operand is necessary to ensure that right is not allocated
     // into edx.
     LOperand* temp = FixedTemp(edx);
@@ -1449,7 +1485,7 @@ LInstruction* LChunkBuilder::DoCompareGeneric(HCompareGeneric* instr) {
 
 LInstruction* LChunkBuilder::DoCompareIDAndBranch(
     HCompareIDAndBranch* instr) {
-  Representation r = instr->GetInputRepresentation();
+  Representation r = instr->representation();
   if (r.IsInteger32()) {
     ASSERT(instr->left()->representation().IsInteger32());
     ASSERT(instr->right()->representation().IsInteger32());
@@ -1614,6 +1650,17 @@ LInstruction* LChunkBuilder::DoDateField(HDateField* instr) {
 }
 
 
+LInstruction* LChunkBuilder::DoSeqStringSetChar(HSeqStringSetChar* instr) {
+  LOperand* string = UseRegister(instr->string());
+  LOperand* index = UseRegister(instr->index());
+  ASSERT(ecx.is_byte_register());
+  LOperand* value = UseFixed(instr->value(), ecx);
+  LSeqStringSetChar* result =
+      new(zone()) LSeqStringSetChar(instr->encoding(), string, index, value);
+  return DefineSameAsFirst(result);
+}
+
+
 LInstruction* LChunkBuilder::DoBoundsCheck(HBoundsCheck* instr) {
   return AssignEnvironment(new(zone()) LBoundsCheck(
       UseRegisterOrConstantAtStart(instr->index()),
@@ -1740,9 +1787,9 @@ LInstruction* LChunkBuilder::DoCheckInstanceType(HCheckInstanceType* instr) {
 
 
 LInstruction* LChunkBuilder::DoCheckPrototypeMaps(HCheckPrototypeMaps* instr) {
-  LOperand* temp = TempRegister();
+  LUnallocated* temp = TempRegister();
   LCheckPrototypeMaps* result = new(zone()) LCheckPrototypeMaps(temp);
-  return AssignEnvironment(result);
+  return AssignEnvironment(Define(result, temp));
 }
 
 
@@ -1776,7 +1823,7 @@ LInstruction* LChunkBuilder::DoClampToUint8(HClampToUint8* instr) {
   Representation input_rep = value->representation();
   if (input_rep.IsDouble()) {
     LOperand* reg = UseRegister(value);
-    return DefineAsRegister(new(zone()) LClampDToUint8(reg));
+    return DefineFixed(new(zone()) LClampDToUint8(reg), eax);
   } else if (input_rep.IsInteger32()) {
     LOperand* reg = UseFixed(value, eax);
     return DefineFixed(new(zone()) LClampIToUint8(reg), eax);
@@ -1929,59 +1976,38 @@ LInstruction* LChunkBuilder::DoLoadExternalArrayPointer(
 }
 
 
-LInstruction* LChunkBuilder::DoLoadKeyedFastElement(
-    HLoadKeyedFastElement* instr) {
-  ASSERT(instr->representation().IsTagged());
-  ASSERT(instr->key()->representation().IsInteger32() ||
-         instr->key()->representation().IsTagged());
-  LOperand* obj = UseRegisterAtStart(instr->object());
-  LOperand* key = UseRegisterOrConstantAtStart(instr->key());
-  LLoadKeyedFastElement* result = new(zone()) LLoadKeyedFastElement(obj, key);
-  if (instr->RequiresHoleCheck()) AssignEnvironment(result);
-  return DefineAsRegister(result);
-}
-
-
-LInstruction* LChunkBuilder::DoLoadKeyedFastDoubleElement(
-    HLoadKeyedFastDoubleElement* instr) {
-  ASSERT(instr->representation().IsDouble());
+LInstruction* LChunkBuilder::DoLoadKeyed(HLoadKeyed* instr) {
   ASSERT(instr->key()->representation().IsInteger32() ||
          instr->key()->representation().IsTagged());
-  LOperand* elements = UseRegisterAtStart(instr->elements());
-  LOperand* key = UseRegisterOrConstantAtStart(instr->key());
-  LLoadKeyedFastDoubleElement* result =
-      new(zone()) LLoadKeyedFastDoubleElement(elements, key);
-  return AssignEnvironment(DefineAsRegister(result));
-}
-
-
-LInstruction* LChunkBuilder::DoLoadKeyedSpecializedArrayElement(
-    HLoadKeyedSpecializedArrayElement* instr) {
   ElementsKind elements_kind = instr->elements_kind();
-  ASSERT(
-      (instr->representation().IsInteger32() &&
-       (elements_kind != EXTERNAL_FLOAT_ELEMENTS) &&
-       (elements_kind != EXTERNAL_DOUBLE_ELEMENTS)) ||
-      (instr->representation().IsDouble() &&
-       ((elements_kind == EXTERNAL_FLOAT_ELEMENTS) ||
-       (elements_kind == EXTERNAL_DOUBLE_ELEMENTS))));
-  ASSERT(instr->key()->representation().IsInteger32() ||
-         instr->key()->representation().IsTagged());
-  LOperand* external_pointer = UseRegister(instr->external_pointer());
   bool clobbers_key = ExternalArrayOpRequiresTemp(
       instr->key()->representation(), elements_kind);
   LOperand* key = clobbers_key
       ? UseTempRegister(instr->key())
-      : UseRegisterOrConstant(instr->key());
+      : UseRegisterOrConstantAtStart(instr->key());
+  LLoadKeyed* result = NULL;
+
+  if (!instr->is_external()) {
+    LOperand* obj = UseRegisterAtStart(instr->elements());
+    result = new(zone()) LLoadKeyed(obj, key);
+  } else {
+    ASSERT(
+        (instr->representation().IsInteger32() &&
+         (elements_kind != EXTERNAL_FLOAT_ELEMENTS) &&
+         (elements_kind != EXTERNAL_DOUBLE_ELEMENTS)) ||
+        (instr->representation().IsDouble() &&
+         ((elements_kind == EXTERNAL_FLOAT_ELEMENTS) ||
+          (elements_kind == EXTERNAL_DOUBLE_ELEMENTS))));
+    LOperand* external_pointer = UseRegister(instr->elements());
+    result = new(zone()) LLoadKeyed(external_pointer, key);
+  }
 
-  LLoadKeyedSpecializedArrayElement* result =
-    new(zone()) LLoadKeyedSpecializedArrayElement(external_pointer, key);
-  LInstruction* load_instr = DefineAsRegister(result);
+  DefineAsRegister(result);
+  bool can_deoptimize = instr->RequiresHoleCheck() ||
+      (elements_kind == EXTERNAL_UNSIGNED_INT_ELEMENTS);
   // An unsigned int array load might overflow and cause a deopt, make sure it
   // has an environment.
-  return (elements_kind == EXTERNAL_UNSIGNED_INT_ELEMENTS)
-      ? AssignEnvironment(load_instr)
-      : load_instr;
+  return can_deoptimize ? AssignEnvironment(result) : result;
 }
 
 
@@ -1996,72 +2022,61 @@ LInstruction* LChunkBuilder::DoLoadKeyedGeneric(HLoadKeyedGeneric* instr) {
 }
 
 
-LInstruction* LChunkBuilder::DoStoreKeyedFastElement(
-    HStoreKeyedFastElement* instr) {
-  bool needs_write_barrier = instr->NeedsWriteBarrier();
-  ASSERT(instr->value()->representation().IsTagged());
-  ASSERT(instr->object()->representation().IsTagged());
-  ASSERT(instr->key()->representation().IsInteger32() ||
-         instr->key()->representation().IsTagged());
+LInstruction* LChunkBuilder::DoStoreKeyed(HStoreKeyed* instr) {
+  if (!instr->is_external()) {
+    ASSERT(instr->elements()->representation().IsTagged());
+    ASSERT(instr->key()->representation().IsInteger32() ||
+           instr->key()->representation().IsTagged());
 
-  LOperand* obj = UseRegister(instr->object());
-  LOperand* val = needs_write_barrier
-      ? UseTempRegister(instr->value())
-      : UseRegisterAtStart(instr->value());
-  LOperand* key = needs_write_barrier
-      ? UseTempRegister(instr->key())
-      : UseRegisterOrConstantAtStart(instr->key());
-  return new(zone()) LStoreKeyedFastElement(obj, key, val);
-}
-
-
-LInstruction* LChunkBuilder::DoStoreKeyedFastDoubleElement(
-    HStoreKeyedFastDoubleElement* instr) {
-  ASSERT(instr->value()->representation().IsDouble());
-  ASSERT(instr->elements()->representation().IsTagged());
-  ASSERT(instr->key()->representation().IsInteger32() ||
-         instr->key()->representation().IsTagged());
-
-  LOperand* elements = UseRegisterAtStart(instr->elements());
-  LOperand* val = UseTempRegister(instr->value());
-  LOperand* key = UseRegisterOrConstantAtStart(instr->key());
-
-  return new(zone()) LStoreKeyedFastDoubleElement(elements, key, val);
-}
+    if (instr->value()->representation().IsDouble()) {
+      LOperand* object = UseRegisterAtStart(instr->elements());
+      LOperand* val = UseTempRegister(instr->value());
+      LOperand* key = UseRegisterOrConstantAtStart(instr->key());
 
+      return new(zone()) LStoreKeyed(object, key, val);
+    } else {
+      ASSERT(instr->value()->representation().IsTagged());
+      bool needs_write_barrier = instr->NeedsWriteBarrier();
+
+      LOperand* obj = UseRegister(instr->elements());
+      LOperand* val = needs_write_barrier
+          ? UseTempRegister(instr->value())
+          : UseRegisterAtStart(instr->value());
+      LOperand* key = needs_write_barrier
+          ? UseTempRegister(instr->key())
+          : UseRegisterOrConstantAtStart(instr->key());
+      return new(zone()) LStoreKeyed(obj, key, val);
+    }
+  }
 
-LInstruction* LChunkBuilder::DoStoreKeyedSpecializedArrayElement(
-    HStoreKeyedSpecializedArrayElement* instr) {
   ElementsKind elements_kind = instr->elements_kind();
-    ASSERT(
+  ASSERT(
       (instr->value()->representation().IsInteger32() &&
        (elements_kind != EXTERNAL_FLOAT_ELEMENTS) &&
        (elements_kind != EXTERNAL_DOUBLE_ELEMENTS)) ||
       (instr->value()->representation().IsDouble() &&
        ((elements_kind == EXTERNAL_FLOAT_ELEMENTS) ||
-       (elements_kind == EXTERNAL_DOUBLE_ELEMENTS))));
-  ASSERT(instr->external_pointer()->representation().IsExternal());
-  ASSERT(instr->key()->representation().IsInteger32() ||
-         instr->key()->representation().IsTagged());
+        (elements_kind == EXTERNAL_DOUBLE_ELEMENTS))));
+  ASSERT(instr->elements()->representation().IsExternal());
 
-  LOperand* external_pointer = UseRegister(instr->external_pointer());
-  LOperand* val = NULL;
-  if (elements_kind == EXTERNAL_BYTE_ELEMENTS ||
+  LOperand* external_pointer = UseRegister(instr->elements());
+  // Determine if we need a byte register in this case for the value.
+  bool val_is_fixed_register =
+      elements_kind == EXTERNAL_BYTE_ELEMENTS ||
       elements_kind == EXTERNAL_UNSIGNED_BYTE_ELEMENTS ||
-      elements_kind == EXTERNAL_PIXEL_ELEMENTS) {
-    // We need a byte register in this case for the value.
-    val = UseFixed(instr->value(), eax);
-  } else {
-    val = UseRegister(instr->value());
-  }
+      elements_kind == EXTERNAL_PIXEL_ELEMENTS;
+
+  LOperand* val = val_is_fixed_register
+      ? UseFixed(instr->value(), eax)
+      : UseRegister(instr->value());
   bool clobbers_key = ExternalArrayOpRequiresTemp(
       instr->key()->representation(), elements_kind);
   LOperand* key = clobbers_key
       ? UseTempRegister(instr->key())
-      : UseRegisterOrConstant(instr->key());
-  return new(zone()) LStoreKeyedSpecializedArrayElement(external_pointer,
-                                                        key,
-                                                        val);
+      : UseRegisterOrConstantAtStart(instr->key());
+  return new(zone()) LStoreKeyed(external_pointer,
+                                 key,
+                                 val);
 }
 
 
@@ -2235,6 +2250,7 @@ LInstruction* LChunkBuilder::DoDeleteProperty(HDeleteProperty* instr) {
 
 
 LInstruction* LChunkBuilder::DoOsrEntry(HOsrEntry* instr) {
+  ASSERT(argument_count_ == 0);
   allocator_->MarkAsOsrEntry();
   current_block_->last_environment()->set_ast_id(instr->ast_id());
   return AssignEnvironment(new(zone()) LOsrEntry);
@@ -2275,12 +2291,10 @@ LInstruction* LChunkBuilder::DoArgumentsObject(HArgumentsObject* instr) {
 
 
 LInstruction* LChunkBuilder::DoAccessArgumentsAt(HAccessArgumentsAt* instr) {
-  LOperand* arguments = UseRegister(instr->arguments());
+  LOperand* args = UseRegister(instr->arguments());
   LOperand* length = UseTempRegister(instr->length());
   LOperand* index = Use(instr->index());
-  LAccessArgumentsAt* result =
-      new(zone()) LAccessArgumentsAt(arguments, length, index);
-  return AssignEnvironment(DefineAsRegister(result));
+  return DefineAsRegister(new(zone()) LAccessArgumentsAt(args, length, index));
 }
 
 
@@ -2317,7 +2331,7 @@ LInstruction* LChunkBuilder::DoSimulate(HSimulate* instr) {
   env->set_ast_id(instr->ast_id());
 
   env->Drop(instr->pop_count());
-  for (int i = 0; i < instr->values()->length(); ++i) {
+  for (int i = instr->values()->length() - 1; i >= 0; --i) {
     HValue* value = instr->values()->at(i);
     if (instr->HasAssignedIndexAt(i)) {
       env->Bind(instr->GetAssignedIndexAt(i), value);
@@ -2370,6 +2384,7 @@ LInstruction* LChunkBuilder::DoEnterInlined(HEnterInlined* instr) {
   if (instr->arguments_var() != NULL) {
     inner->Bind(instr->arguments_var(), graph()->GetArgumentsObject());
   }
+  inner->set_entry(instr);
   current_block_->UpdateEnvironment(inner);
   chunk_->AddInlinedClosure(instr->closure());
   return NULL;
@@ -2381,7 +2396,7 @@ LInstruction* LChunkBuilder::DoLeaveInlined(HLeaveInlined* instr) {
 
   HEnvironment* env = current_block_->last_environment();
 
-  if (instr->arguments_pushed()) {
+  if (env->entry()->arguments_pushed()) {
     int argument_count = env->arguments_environment()->parameter_count();
     pop = new(zone()) LDrop(argument_count);
     argument_count_ -= argument_count;
diff --git a/deps/v8/src/ia32/lithium-ia32.h b/deps/v8/src/ia32/lithium-ia32.h
index 83a6c6f32b..cf85374267 100644
--- a/deps/v8/src/ia32/lithium-ia32.h
+++ b/deps/v8/src/ia32/lithium-ia32.h
@@ -119,14 +119,13 @@ class LCodeGen;
   V(LoadFunctionPrototype)                      \
   V(LoadGlobalCell)                             \
   V(LoadGlobalGeneric)                          \
-  V(LoadKeyedFastElement)                       \
-  V(LoadKeyedFastDoubleElement)                 \
+  V(LoadKeyed)                                  \
   V(LoadKeyedGeneric)                           \
-  V(LoadKeyedSpecializedArrayElement)           \
   V(LoadNamedField)                             \
   V(LoadNamedFieldPolymorphic)                  \
   V(LoadNamedGeneric)                           \
   V(MapEnumLength)                              \
+  V(MathExp)                                    \
   V(MathFloorOfDiv)                             \
   V(MathMinMax)                                 \
   V(MathPowHalf)                                \
@@ -145,6 +144,7 @@ class LCodeGen;
   V(PushArgument)                               \
   V(RegExpLiteral)                              \
   V(Return)                                     \
+  V(SeqStringSetChar)                           \
   V(ShiftI)                                     \
   V(SmiTag)                                     \
   V(SmiUntag)                                   \
@@ -152,10 +152,8 @@ class LCodeGen;
   V(StoreContextSlot)                           \
   V(StoreGlobalCell)                            \
   V(StoreGlobalGeneric)                         \
-  V(StoreKeyedFastDoubleElement)                \
-  V(StoreKeyedFastElement)                      \
+  V(StoreKeyed)                                 \
   V(StoreKeyedGeneric)                          \
-  V(StoreKeyedSpecializedArrayElement)          \
   V(StoreNamedField)                            \
   V(StoreNamedGeneric)                          \
   V(StringAdd)                                  \
@@ -257,9 +255,6 @@ class LInstruction: public ZoneObject {
   virtual bool HasResult() const = 0;
   virtual LOperand* result() = 0;
 
-  virtual int TempCount() = 0;
-  virtual LOperand* TempAt(int i) = 0;
-
   LOperand* FirstInput() { return InputAt(0); }
   LOperand* Output() { return HasResult() ? result() : NULL; }
 
@@ -273,6 +268,10 @@ class LInstruction: public ZoneObject {
   virtual int InputCount() = 0;
   virtual LOperand* InputAt(int i) = 0;
 
+  friend class TempIterator;
+  virtual int TempCount() = 0;
+  virtual LOperand* TempAt(int i) = 0;
+
   LEnvironment* environment_;
   SetOncePointer<LPointerMap> pointer_map_;
   HValue* hydrogen_value_;
@@ -292,18 +291,18 @@ class LTemplateInstruction: public LInstruction {
   void set_result(LOperand* operand) { results_[0] = operand; }
   LOperand* result() { return results_[0]; }
 
-  LOperand* InputAt(int i) { return inputs_[i]; }
-
-  int TempCount() { return T; }
-  LOperand* TempAt(int i) { return temps_[i]; }
-
  protected:
   EmbeddedContainer<LOperand*, R> results_;
   EmbeddedContainer<LOperand*, I> inputs_;
   EmbeddedContainer<LOperand*, T> temps_;
 
  private:
+  // Iterator support.
   virtual int InputCount() { return I; }
+  virtual LOperand* InputAt(int i) { return inputs_[i]; }
+
+  virtual int TempCount() { return T; }
+  virtual LOperand* TempAt(int i) { return temps_[i]; }
 };
 
 
@@ -423,11 +422,11 @@ class LCallStub: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = context;
   }
 
+  LOperand* context() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(CallStub, "call-stub")
   DECLARE_HYDROGEN_ACCESSOR(CallStub)
 
-  LOperand* context() { return inputs_[0]; }
-
   TranscendentalCache::Type transcendental_type() {
     return hydrogen()->transcendental_type();
   }
@@ -467,10 +466,11 @@ class LWrapReceiver: public LTemplateInstruction<1, 2, 1> {
     temps_[0] = temp;
   }
 
-  DECLARE_CONCRETE_INSTRUCTION(WrapReceiver, "wrap-receiver")
-
   LOperand* receiver() { return inputs_[0]; }
   LOperand* function() { return inputs_[1]; }
+  LOperand* temp() { return temps_[0]; }
+
+  DECLARE_CONCRETE_INSTRUCTION(WrapReceiver, "wrap-receiver")
 };
 
 
@@ -486,12 +486,12 @@ class LApplyArguments: public LTemplateInstruction<1, 4, 0> {
     inputs_[3] = elements;
   }
 
-  DECLARE_CONCRETE_INSTRUCTION(ApplyArguments, "apply-arguments")
-
   LOperand* function() { return inputs_[0]; }
   LOperand* receiver() { return inputs_[1]; }
   LOperand* length() { return inputs_[2]; }
   LOperand* elements() { return inputs_[3]; }
+
+  DECLARE_CONCRETE_INSTRUCTION(ApplyArguments, "apply-arguments")
 };
 
 
@@ -503,12 +503,12 @@ class LAccessArgumentsAt: public LTemplateInstruction<1, 3, 0> {
     inputs_[2] = index;
   }
 
-  DECLARE_CONCRETE_INSTRUCTION(AccessArgumentsAt, "access-arguments-at")
-
   LOperand* arguments() { return inputs_[0]; }
   LOperand* length() { return inputs_[1]; }
   LOperand* index() { return inputs_[2]; }
 
+  DECLARE_CONCRETE_INSTRUCTION(AccessArgumentsAt, "access-arguments-at")
+
   virtual void PrintDataTo(StringStream* stream);
 };
 
@@ -519,6 +519,8 @@ class LArgumentsLength: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = elements;
   }
 
+  LOperand* elements() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(ArgumentsLength, "arguments-length")
 };
 
@@ -538,6 +540,10 @@ class LModI: public LTemplateInstruction<1, 2, 1> {
     temps_[0] = temp;
   }
 
+  LOperand* left() { return inputs_[0]; }
+  LOperand* right() { return inputs_[1]; }
+  LOperand* temp() { return temps_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(ModI, "mod-i")
   DECLARE_HYDROGEN_ACCESSOR(Mod)
 };
@@ -551,6 +557,9 @@ class LDivI: public LTemplateInstruction<1, 2, 1> {
     temps_[0] = temp;
   }
 
+  LOperand* left() { return inputs_[0]; }
+  LOperand* right() { return inputs_[1]; }
+
   DECLARE_CONCRETE_INSTRUCTION(DivI, "div-i")
   DECLARE_HYDROGEN_ACCESSOR(Div)
 };
@@ -566,6 +575,10 @@ class LMathFloorOfDiv: public LTemplateInstruction<1, 2, 1> {
     temps_[0] = temp;
   }
 
+  LOperand* left() { return inputs_[0]; }
+  LOperand* right() { return inputs_[1]; }
+  LOperand* temp() { return temps_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(MathFloorOfDiv, "math-floor-of-div")
   DECLARE_HYDROGEN_ACCESSOR(MathFloorOfDiv)
 };
@@ -579,6 +592,10 @@ class LMulI: public LTemplateInstruction<1, 2, 1> {
     temps_[0] = temp;
   }
 
+  LOperand* left() { return inputs_[0]; }
+  LOperand* right() { return inputs_[1]; }
+  LOperand* temp() { return temps_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(MulI, "mul-i")
   DECLARE_HYDROGEN_ACCESSOR(Mul)
 };
@@ -591,12 +608,15 @@ class LCmpIDAndBranch: public LControlInstruction<2, 0> {
     inputs_[1] = right;
   }
 
+  LOperand* left() { return inputs_[0]; }
+  LOperand* right() { return inputs_[1]; }
+
   DECLARE_CONCRETE_INSTRUCTION(CmpIDAndBranch, "cmp-id-and-branch")
   DECLARE_HYDROGEN_ACCESSOR(CompareIDAndBranch)
 
   Token::Value op() const { return hydrogen()->token(); }
   bool is_double() const {
-    return hydrogen()->GetInputRepresentation().IsDouble();
+    return hydrogen()->representation().IsDouble();
   }
 
   virtual void PrintDataTo(StringStream* stream);
@@ -621,6 +641,27 @@ class LUnaryMathOperation: public LTemplateInstruction<1, 2, 0> {
 };
 
 
+class LMathExp: public LTemplateInstruction<1, 1, 2> {
+ public:
+  LMathExp(LOperand* value,
+           LOperand* temp1,
+           LOperand* temp2) {
+    inputs_[0] = value;
+    temps_[0] = temp1;
+    temps_[1] = temp2;
+    ExternalReference::InitializeMathExpData();
+  }
+
+  LOperand* value() { return inputs_[0]; }
+  LOperand* temp1() { return temps_[0]; }
+  LOperand* temp2() { return temps_[1]; }
+
+  DECLARE_CONCRETE_INSTRUCTION(MathExp, "math-exp")
+
+  virtual void PrintDataTo(StringStream* stream);
+};
+
+
 class LMathPowHalf: public LTemplateInstruction<1, 2, 1> {
  public:
   LMathPowHalf(LOperand* context, LOperand* value, LOperand* temp) {
@@ -646,6 +687,9 @@ class LCmpObjectEqAndBranch: public LControlInstruction<2, 0> {
     inputs_[1] = right;
   }
 
+  LOperand* left() { return inputs_[0]; }
+  LOperand* right() { return inputs_[1]; }
+
   DECLARE_CONCRETE_INSTRUCTION(CmpObjectEqAndBranch,
                                "cmp-object-eq-and-branch")
 };
@@ -657,6 +701,8 @@ class LCmpConstantEqAndBranch: public LControlInstruction<1, 0> {
     inputs_[0] = left;
   }
 
+  LOperand* left() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(CmpConstantEqAndBranch,
                                "cmp-constant-eq-and-branch")
   DECLARE_HYDROGEN_ACCESSOR(CompareConstantEqAndBranch)
@@ -670,6 +716,9 @@ class LIsNilAndBranch: public LControlInstruction<1, 1> {
     temps_[0] = temp;
   }
 
+  LOperand* value() { return inputs_[0]; }
+  LOperand* temp() { return temps_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(IsNilAndBranch, "is-nil-and-branch")
   DECLARE_HYDROGEN_ACCESSOR(IsNilAndBranch)
 
@@ -687,6 +736,9 @@ class LIsObjectAndBranch: public LControlInstruction<1, 1> {
     temps_[0] = temp;
   }
 
+  LOperand* value() { return inputs_[0]; }
+  LOperand* temp() { return temps_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(IsObjectAndBranch, "is-object-and-branch")
 
   virtual void PrintDataTo(StringStream* stream);
@@ -700,6 +752,9 @@ class LIsStringAndBranch: public LControlInstruction<1, 1> {
     temps_[0] = temp;
   }
 
+  LOperand* value() { return inputs_[0]; }
+  LOperand* temp() { return temps_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(IsStringAndBranch, "is-string-and-branch")
 
   virtual void PrintDataTo(StringStream* stream);
@@ -712,6 +767,8 @@ class LIsSmiAndBranch: public LControlInstruction<1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(IsSmiAndBranch, "is-smi-and-branch")
   DECLARE_HYDROGEN_ACCESSOR(IsSmiAndBranch)
 
@@ -726,6 +783,9 @@ class LIsUndetectableAndBranch: public LControlInstruction<1, 1> {
     temps_[0] = temp;
   }
 
+  LOperand* value() { return inputs_[0]; }
+  LOperand* temp() { return temps_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(IsUndetectableAndBranch,
                                "is-undetectable-and-branch")
 
@@ -741,6 +801,9 @@ class LStringCompareAndBranch: public LControlInstruction<3, 0> {
     inputs_[2] = right;
   }
 
+  LOperand* left() { return inputs_[1]; }
+  LOperand* right() { return inputs_[2]; }
+
   DECLARE_CONCRETE_INSTRUCTION(StringCompareAndBranch,
                                "string-compare-and-branch")
   DECLARE_HYDROGEN_ACCESSOR(StringCompareAndBranch)
@@ -758,6 +821,9 @@ class LHasInstanceTypeAndBranch: public LControlInstruction<1, 1> {
     temps_[0] = temp;
   }
 
+  LOperand* value() { return inputs_[0]; }
+  LOperand* temp() { return temps_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(HasInstanceTypeAndBranch,
                                "has-instance-type-and-branch")
   DECLARE_HYDROGEN_ACCESSOR(HasInstanceTypeAndBranch)
@@ -772,6 +838,8 @@ class LGetCachedArrayIndex: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(GetCachedArrayIndex, "get-cached-array-index")
   DECLARE_HYDROGEN_ACCESSOR(GetCachedArrayIndex)
 };
@@ -783,8 +851,11 @@ class LHasCachedArrayIndexAndBranch: public LControlInstruction<1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(HasCachedArrayIndexAndBranch,
                                "has-cached-array-index-and-branch")
+
   virtual void PrintDataTo(StringStream* stream);
 };
 
@@ -795,6 +866,8 @@ class LIsConstructCallAndBranch: public LControlInstruction<0, 1> {
     temps_[0] = temp;
   }
 
+  LOperand* temp() { return temps_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(IsConstructCallAndBranch,
                                "is-construct-call-and-branch")
 };
@@ -808,6 +881,10 @@ class LClassOfTestAndBranch: public LControlInstruction<1, 2> {
     temps_[1] = temp2;
   }
 
+  LOperand* value() { return inputs_[0]; }
+  LOperand* temp() { return temps_[0]; }
+  LOperand* temp2() { return temps_[1]; }
+
   DECLARE_CONCRETE_INSTRUCTION(ClassOfTestAndBranch,
                                "class-of-test-and-branch")
   DECLARE_HYDROGEN_ACCESSOR(ClassOfTestAndBranch)
@@ -839,9 +916,9 @@ class LInstanceOf: public LTemplateInstruction<1, 3, 0> {
     inputs_[2] = right;
   }
 
-  DECLARE_CONCRETE_INSTRUCTION(InstanceOf, "instance-of")
-
   LOperand* context() { return inputs_[0]; }
+
+  DECLARE_CONCRETE_INSTRUCTION(InstanceOf, "instance-of")
 };
 
 
@@ -853,6 +930,9 @@ class LInstanceOfKnownGlobal: public LTemplateInstruction<1, 2, 1> {
     temps_[0] = temp;
   }
 
+  LOperand* value() { return inputs_[1]; }
+  LOperand* temp() { return temps_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(InstanceOfKnownGlobal,
                                "instance-of-known-global")
   DECLARE_HYDROGEN_ACCESSOR(InstanceOfKnownGlobal)
@@ -892,10 +972,13 @@ class LBitI: public LTemplateInstruction<1, 2, 0> {
     inputs_[1] = right;
   }
 
-  Token::Value op() const { return hydrogen()->op(); }
+  LOperand* left() { return inputs_[0]; }
+  LOperand* right() { return inputs_[1]; }
 
   DECLARE_CONCRETE_INSTRUCTION(BitI, "bit-i")
   DECLARE_HYDROGEN_ACCESSOR(Bitwise)
+
+  Token::Value op() const { return hydrogen()->op(); }
 };
 
 
@@ -907,12 +990,14 @@ class LShiftI: public LTemplateInstruction<1, 2, 0> {
     inputs_[1] = right;
   }
 
-  Token::Value op() const { return op_; }
-
-  bool can_deopt() const { return can_deopt_; }
+  LOperand* left() { return inputs_[0]; }
+  LOperand* right() { return inputs_[1]; }
 
   DECLARE_CONCRETE_INSTRUCTION(ShiftI, "shift-i")
 
+  Token::Value op() const { return op_; }
+  bool can_deopt() const { return can_deopt_; }
+
  private:
   Token::Value op_;
   bool can_deopt_;
@@ -926,6 +1011,9 @@ class LSubI: public LTemplateInstruction<1, 2, 0> {
     inputs_[1] = right;
   }
 
+  LOperand* left() { return inputs_[0]; }
+  LOperand* right() { return inputs_[1]; }
+
   DECLARE_CONCRETE_INSTRUCTION(SubI, "sub-i")
   DECLARE_HYDROGEN_ACCESSOR(Sub)
 };
@@ -946,6 +1034,8 @@ class LConstantD: public LTemplateInstruction<1, 0, 1> {
     temps_[0] = temp;
   }
 
+  LOperand* temp() { return temps_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(ConstantD, "constant-d")
   DECLARE_HYDROGEN_ACCESSOR(Constant)
 
@@ -964,11 +1054,14 @@ class LConstantT: public LTemplateInstruction<1, 0, 0> {
 
 class LBranch: public LControlInstruction<1, 1> {
  public:
-  explicit LBranch(LOperand* value, LOperand* temp) {
+  LBranch(LOperand* value, LOperand* temp) {
     inputs_[0] = value;
     temps_[0] = temp;
   }
 
+  LOperand* value() { return inputs_[0]; }
+  LOperand* temp() { return temps_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(Branch, "branch")
   DECLARE_HYDROGEN_ACCESSOR(Branch)
 
@@ -982,6 +1075,8 @@ class LCmpMapAndBranch: public LTemplateInstruction<0, 1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(CmpMapAndBranch, "cmp-map-and-branch")
   DECLARE_HYDROGEN_ACCESSOR(CompareMap)
 
@@ -1003,6 +1098,8 @@ class LJSArrayLength: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(JSArrayLength, "js-array-length")
   DECLARE_HYDROGEN_ACCESSOR(JSArrayLength)
 };
@@ -1014,6 +1111,8 @@ class LFixedArrayBaseLength: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(FixedArrayBaseLength,
                                "fixed-array-base-length")
   DECLARE_HYDROGEN_ACCESSOR(FixedArrayBaseLength)
@@ -1026,6 +1125,8 @@ class LMapEnumLength: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(MapEnumLength, "map-enum-length")
 };
 
@@ -1036,6 +1137,8 @@ class LElementsKind: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(ElementsKind, "elements-kind")
   DECLARE_HYDROGEN_ACCESSOR(ElementsKind)
 };
@@ -1048,6 +1151,9 @@ class LValueOf: public LTemplateInstruction<1, 1, 1> {
     temps_[0] = temp;
   }
 
+  LOperand* value() { return inputs_[0]; }
+  LOperand* temp() { return temps_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(ValueOf, "value-of")
   DECLARE_HYDROGEN_ACCESSOR(ValueOf)
 };
@@ -1061,6 +1167,9 @@ class LDateField: public LTemplateInstruction<1, 1, 1> {
     temps_[0] = temp;
   }
 
+  LOperand* date() { return inputs_[0]; }
+  LOperand* temp() { return temps_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(DateField, "date-field")
   DECLARE_HYDROGEN_ACCESSOR(DateField)
 
@@ -1071,6 +1180,30 @@ class LDateField: public LTemplateInstruction<1, 1, 1> {
 };
 
 
+class LSeqStringSetChar: public LTemplateInstruction<1, 3, 0> {
+ public:
+  LSeqStringSetChar(String::Encoding encoding,
+                    LOperand* string,
+                    LOperand* index,
+                    LOperand* value) : encoding_(encoding) {
+    inputs_[0] = string;
+    inputs_[1] = index;
+    inputs_[2] = value;
+  }
+
+  String::Encoding encoding() { return encoding_; }
+  LOperand* string() { return inputs_[0]; }
+  LOperand* index() { return inputs_[1]; }
+  LOperand* value() { return inputs_[2]; }
+
+  DECLARE_CONCRETE_INSTRUCTION(SeqStringSetChar, "seq-string-set-char")
+  DECLARE_HYDROGEN_ACCESSOR(SeqStringSetChar)
+
+ private:
+  String::Encoding encoding_;
+};
+
+
 class LThrow: public LTemplateInstruction<0, 2, 0> {
  public:
   LThrow(LOperand* context, LOperand* value) {
@@ -1091,6 +1224,8 @@ class LBitNotI: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(BitNotI, "bit-not-i")
 };
 
@@ -1102,6 +1237,9 @@ class LAddI: public LTemplateInstruction<1, 2, 0> {
     inputs_[1] = right;
   }
 
+  LOperand* left() { return inputs_[0]; }
+  LOperand* right() { return inputs_[1]; }
+
   DECLARE_CONCRETE_INSTRUCTION(AddI, "add-i")
   DECLARE_HYDROGEN_ACCESSOR(Add)
 };
@@ -1114,6 +1252,9 @@ class LMathMinMax: public LTemplateInstruction<1, 2, 0> {
     inputs_[1] = right;
   }
 
+  LOperand* left() { return inputs_[0]; }
+  LOperand* right() { return inputs_[1]; }
+
   DECLARE_CONCRETE_INSTRUCTION(MathMinMax, "min-max")
   DECLARE_HYDROGEN_ACCESSOR(MathMinMax)
 };
@@ -1126,6 +1267,9 @@ class LPower: public LTemplateInstruction<1, 2, 0> {
     inputs_[1] = right;
   }
 
+  LOperand* left() { return inputs_[0]; }
+  LOperand* right() { return inputs_[1]; }
+
   DECLARE_CONCRETE_INSTRUCTION(Power, "power")
   DECLARE_HYDROGEN_ACCESSOR(Power)
 };
@@ -1137,6 +1281,8 @@ class LRandom: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = global_object;
   }
 
+  LOperand* global_object() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(Random, "random")
   DECLARE_HYDROGEN_ACCESSOR(Random)
 };
@@ -1150,6 +1296,9 @@ class LArithmeticD: public LTemplateInstruction<1, 2, 0> {
     inputs_[1] = right;
   }
 
+  LOperand* left() { return inputs_[0]; }
+  LOperand* right() { return inputs_[1]; }
+
   Token::Value op() const { return op_; }
 
   virtual Opcode opcode() const { return LInstruction::kArithmeticD; }
@@ -1173,14 +1322,15 @@ class LArithmeticT: public LTemplateInstruction<1, 3, 0> {
     inputs_[2] = right;
   }
 
+  LOperand* context() { return inputs_[0]; }
+  LOperand* left() { return inputs_[1]; }
+  LOperand* right() { return inputs_[2]; }
+
   virtual Opcode opcode() const { return LInstruction::kArithmeticT; }
   virtual void CompileToNative(LCodeGen* generator);
   virtual const char* Mnemonic() const;
 
   Token::Value op() const { return op_; }
-  LOperand* context() { return inputs_[0]; }
-  LOperand* left() { return inputs_[1]; }
-  LOperand* right() { return inputs_[2]; }
 
  private:
   Token::Value op_;
@@ -1203,10 +1353,10 @@ class LLoadNamedField: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = object;
   }
 
+  LOperand* object() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(LoadNamedField, "load-named-field")
   DECLARE_HYDROGEN_ACCESSOR(LoadNamedField)
-
-  LOperand* object() { return inputs_[0]; }
 };
 
 
@@ -1217,11 +1367,11 @@ class LLoadNamedFieldPolymorphic: public LTemplateInstruction<1, 2, 0> {
     inputs_[1] = object;
   }
 
-  DECLARE_CONCRETE_INSTRUCTION(LoadNamedField, "load-named-field-polymorphic")
-  DECLARE_HYDROGEN_ACCESSOR(LoadNamedFieldPolymorphic)
-
   LOperand* context() { return inputs_[0]; }
   LOperand* object() { return inputs_[1]; }
+
+  DECLARE_CONCRETE_INSTRUCTION(LoadNamedField, "load-named-field-polymorphic")
+  DECLARE_HYDROGEN_ACCESSOR(LoadNamedFieldPolymorphic)
 };
 
 
@@ -1232,11 +1382,12 @@ class LLoadNamedGeneric: public LTemplateInstruction<1, 2, 0> {
     inputs_[1] = object;
   }
 
+  LOperand* context() { return inputs_[0]; }
+  LOperand* object() { return inputs_[1]; }
+
   DECLARE_CONCRETE_INSTRUCTION(LoadNamedGeneric, "load-named-generic")
   DECLARE_HYDROGEN_ACCESSOR(LoadNamedGeneric)
 
-  LOperand* context() { return inputs_[0]; }
-  LOperand* object() { return inputs_[1]; }
   Handle<Object> name() const { return hydrogen()->name(); }
 };
 
@@ -1248,10 +1399,11 @@ class LLoadFunctionPrototype: public LTemplateInstruction<1, 1, 1> {
     temps_[0] = temp;
   }
 
+  LOperand* function() { return inputs_[0]; }
+  LOperand* temp() { return temps_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(LoadFunctionPrototype, "load-function-prototype")
   DECLARE_HYDROGEN_ACCESSOR(LoadFunctionPrototype)
-
-  LOperand* function() { return inputs_[0]; }
 };
 
 
@@ -1261,6 +1413,8 @@ class LLoadElements: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = object;
   }
 
+  LOperand* object() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(LoadElements, "load-elements")
 };
 
@@ -1271,40 +1425,33 @@ class LLoadExternalArrayPointer: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = object;
   }
 
+  LOperand* object() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(LoadExternalArrayPointer,
                                "load-external-array-pointer")
 };
 
 
-class LLoadKeyedFastElement: public LTemplateInstruction<1, 2, 0> {
+class LLoadKeyed: public LTemplateInstruction<1, 2, 0> {
  public:
-  LLoadKeyedFastElement(LOperand* elements, LOperand* key) {
+  LLoadKeyed(LOperand* elements, LOperand* key) {
     inputs_[0] = elements;
     inputs_[1] = key;
   }
 
-  DECLARE_CONCRETE_INSTRUCTION(LoadKeyedFastElement, "load-keyed-fast-element")
-  DECLARE_HYDROGEN_ACCESSOR(LoadKeyedFastElement)
-
   LOperand* elements() { return inputs_[0]; }
   LOperand* key() { return inputs_[1]; }
-  uint32_t additional_index() const { return hydrogen()->index_offset(); }
-};
-
-
-class LLoadKeyedFastDoubleElement: public LTemplateInstruction<1, 2, 0> {
- public:
-  LLoadKeyedFastDoubleElement(LOperand* elements, LOperand* key) {
-    inputs_[0] = elements;
-    inputs_[1] = key;
+  ElementsKind elements_kind() const {
+    return hydrogen()->elements_kind();
+  }
+  bool is_external() const {
+    return hydrogen()->is_external();
   }
 
-  DECLARE_CONCRETE_INSTRUCTION(LoadKeyedFastDoubleElement,
-                               "load-keyed-fast-double-element")
-  DECLARE_HYDROGEN_ACCESSOR(LoadKeyedFastDoubleElement)
+  DECLARE_CONCRETE_INSTRUCTION(LoadKeyed, "load-keyed")
+  DECLARE_HYDROGEN_ACCESSOR(LoadKeyed)
 
-  LOperand* elements() { return inputs_[0]; }
-  LOperand* key() { return inputs_[1]; }
+  virtual void PrintDataTo(StringStream* stream);
   uint32_t additional_index() const { return hydrogen()->index_offset(); }
 };
 
@@ -1322,26 +1469,6 @@ inline static bool ExternalArrayOpRequiresTemp(
 }
 
 
-class LLoadKeyedSpecializedArrayElement: public LTemplateInstruction<1, 2, 0> {
- public:
-  LLoadKeyedSpecializedArrayElement(LOperand* external_pointer, LOperand* key) {
-    inputs_[0] = external_pointer;
-    inputs_[1] = key;
-  }
-
-  DECLARE_CONCRETE_INSTRUCTION(LoadKeyedSpecializedArrayElement,
-                               "load-keyed-specialized-array-element")
-  DECLARE_HYDROGEN_ACCESSOR(LoadKeyedSpecializedArrayElement)
-
-  LOperand* external_pointer() { return inputs_[0]; }
-  LOperand* key() { return inputs_[1]; }
-  ElementsKind elements_kind() const {
-    return hydrogen()->elements_kind();
-  }
-  uint32_t additional_index() const { return hydrogen()->index_offset(); }
-};
-
-
 class LLoadKeyedGeneric: public LTemplateInstruction<1, 3, 0> {
  public:
   LLoadKeyedGeneric(LOperand* context, LOperand* obj, LOperand* key) {
@@ -1350,11 +1477,11 @@ class LLoadKeyedGeneric: public LTemplateInstruction<1, 3, 0> {
     inputs_[2] = key;
   }
 
-  DECLARE_CONCRETE_INSTRUCTION(LoadKeyedGeneric, "load-keyed-generic")
-
   LOperand* context() { return inputs_[0]; }
   LOperand* object() { return inputs_[1]; }
   LOperand* key() { return inputs_[2]; }
+
+  DECLARE_CONCRETE_INSTRUCTION(LoadKeyedGeneric, "load-keyed-generic")
 };
 
 
@@ -1372,11 +1499,12 @@ class LLoadGlobalGeneric: public LTemplateInstruction<1, 2, 0> {
     inputs_[1] = global_object;
   }
 
+  LOperand* context() { return inputs_[0]; }
+  LOperand* global_object() { return inputs_[1]; }
+
   DECLARE_CONCRETE_INSTRUCTION(LoadGlobalGeneric, "load-global-generic")
   DECLARE_HYDROGEN_ACCESSOR(LoadGlobalGeneric)
 
-  LOperand* context() { return inputs_[0]; }
-  LOperand* global_object() { return inputs_[1]; }
   Handle<Object> name() const { return hydrogen()->name(); }
   bool for_typeof() const { return hydrogen()->for_typeof(); }
 };
@@ -1388,10 +1516,10 @@ class LStoreGlobalCell: public LTemplateInstruction<0, 1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(StoreGlobalCell, "store-global-cell")
   DECLARE_HYDROGEN_ACCESSOR(StoreGlobalCell)
-
-  LOperand* value() { return inputs_[0]; }
 };
 
 
@@ -1405,13 +1533,14 @@ class LStoreGlobalGeneric: public LTemplateInstruction<0, 3, 0> {
     inputs_[2] = value;
   }
 
+  LOperand* context() { return inputs_[0]; }
+  LOperand* global_object() { return inputs_[1]; }
+  LOperand* value() { return inputs_[2]; }
+
   DECLARE_CONCRETE_INSTRUCTION(StoreGlobalGeneric, "store-global-generic")
   DECLARE_HYDROGEN_ACCESSOR(StoreGlobalGeneric)
 
-  LOperand* context() { return InputAt(0); }
-  LOperand* global_object() { return InputAt(1); }
   Handle<Object> name() const { return hydrogen()->name(); }
-  LOperand* value() { return InputAt(2); }
   StrictModeFlag strict_mode_flag() { return hydrogen()->strict_mode_flag(); }
 };
 
@@ -1422,10 +1551,11 @@ class LLoadContextSlot: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = context;
   }
 
+  LOperand* context() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(LoadContextSlot, "load-context-slot")
   DECLARE_HYDROGEN_ACCESSOR(LoadContextSlot)
 
-  LOperand* context() { return InputAt(0); }
   int slot_index() { return hydrogen()->slot_index(); }
 
   virtual void PrintDataTo(StringStream* stream);
@@ -1440,11 +1570,13 @@ class LStoreContextSlot: public LTemplateInstruction<0, 2, 1> {
     temps_[0] = temp;
   }
 
+  LOperand* context() { return inputs_[0]; }
+  LOperand* value() { return inputs_[1]; }
+  LOperand* temp() { return temps_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(StoreContextSlot, "store-context-slot")
   DECLARE_HYDROGEN_ACCESSOR(StoreContextSlot)
 
-  LOperand* context() { return InputAt(0); }
-  LOperand* value() { return InputAt(1); }
   int slot_index() { return hydrogen()->slot_index(); }
 
   virtual void PrintDataTo(StringStream* stream);
@@ -1457,6 +1589,8 @@ class LPushArgument: public LTemplateInstruction<0, 1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(PushArgument, "push-argument")
 };
 
@@ -1493,9 +1627,9 @@ class LOuterContext: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = context;
   }
 
-  DECLARE_CONCRETE_INSTRUCTION(OuterContext, "outer-context")
+  LOperand* context() { return inputs_[0]; }
 
-  LOperand* context() { return InputAt(0); }
+  DECLARE_CONCRETE_INSTRUCTION(OuterContext, "outer-context")
 };
 
 
@@ -1505,6 +1639,8 @@ class LDeclareGlobals: public LTemplateInstruction<0, 1, 0> {
     inputs_[0] = context;
   }
 
+  LOperand* context() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(DeclareGlobals, "declare-globals")
   DECLARE_HYDROGEN_ACCESSOR(DeclareGlobals)
 };
@@ -1516,9 +1652,9 @@ class LGlobalObject: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = context;
   }
 
-  DECLARE_CONCRETE_INSTRUCTION(GlobalObject, "global-object")
+  LOperand* context() { return inputs_[0]; }
 
-  LOperand* context() { return InputAt(0); }
+  DECLARE_CONCRETE_INSTRUCTION(GlobalObject, "global-object")
 };
 
 
@@ -1528,9 +1664,9 @@ class LGlobalReceiver: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = global_object;
   }
 
-  DECLARE_CONCRETE_INSTRUCTION(GlobalReceiver, "global-receiver")
+  LOperand* global() { return inputs_[0]; }
 
-  LOperand* global() { return InputAt(0); }
+  DECLARE_CONCRETE_INSTRUCTION(GlobalReceiver, "global-receiver")
 };
 
 
@@ -1553,12 +1689,12 @@ class LInvokeFunction: public LTemplateInstruction<1, 2, 0> {
     inputs_[1] = function;
   }
 
-  DECLARE_CONCRETE_INSTRUCTION(InvokeFunction, "invoke-function")
-  DECLARE_HYDROGEN_ACCESSOR(InvokeFunction)
-
   LOperand* context() { return inputs_[0]; }
   LOperand* function() { return inputs_[1]; }
 
+  DECLARE_CONCRETE_INSTRUCTION(InvokeFunction, "invoke-function")
+  DECLARE_HYDROGEN_ACCESSOR(InvokeFunction)
+
   virtual void PrintDataTo(StringStream* stream);
 
   int arity() const { return hydrogen()->argument_count() - 1; }
@@ -1573,12 +1709,12 @@ class LCallKeyed: public LTemplateInstruction<1, 2, 0> {
     inputs_[1] = key;
   }
 
-  DECLARE_CONCRETE_INSTRUCTION(CallKeyed, "call-keyed")
-  DECLARE_HYDROGEN_ACCESSOR(CallKeyed)
-
   LOperand* context() { return inputs_[0]; }
   LOperand* key() { return inputs_[1]; }
 
+  DECLARE_CONCRETE_INSTRUCTION(CallKeyed, "call-keyed")
+  DECLARE_HYDROGEN_ACCESSOR(CallKeyed)
+
   virtual void PrintDataTo(StringStream* stream);
 
   int arity() const { return hydrogen()->argument_count() - 1; }
@@ -1591,12 +1727,13 @@ class LCallNamed: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = context;
   }
 
+  LOperand* context() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(CallNamed, "call-named")
   DECLARE_HYDROGEN_ACCESSOR(CallNamed)
 
   virtual void PrintDataTo(StringStream* stream);
 
-  LOperand* context() { return inputs_[0]; }
   Handle<String> name() const { return hydrogen()->name(); }
   int arity() const { return hydrogen()->argument_count() - 1; }
 };
@@ -1609,11 +1746,12 @@ class LCallFunction: public LTemplateInstruction<1, 2, 0> {
     inputs_[1] = function;
   }
 
+  LOperand* context() { return inputs_[0]; }
+  LOperand* function() { return inputs_[1]; }
+
   DECLARE_CONCRETE_INSTRUCTION(CallFunction, "call-function")
   DECLARE_HYDROGEN_ACCESSOR(CallFunction)
 
-  LOperand* context() { return inputs_[0]; }
-  LOperand* function() { return inputs_[1]; }
   int arity() const { return hydrogen()->argument_count() - 1; }
 };
 
@@ -1624,12 +1762,13 @@ class LCallGlobal: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = context;
   }
 
+  LOperand* context() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(CallGlobal, "call-global")
   DECLARE_HYDROGEN_ACCESSOR(CallGlobal)
 
   virtual void PrintDataTo(StringStream* stream);
 
-  LOperand* context() { return inputs_[0]; }
   Handle<String> name() const {return hydrogen()->name(); }
   int arity() const { return hydrogen()->argument_count() - 1; }
 };
@@ -1654,13 +1793,14 @@ class LCallNew: public LTemplateInstruction<1, 2, 0> {
     inputs_[1] = constructor;
   }
 
+  LOperand* context() { return inputs_[0]; }
+  LOperand* constructor() { return inputs_[1]; }
+
   DECLARE_CONCRETE_INSTRUCTION(CallNew, "call-new")
   DECLARE_HYDROGEN_ACCESSOR(CallNew)
 
   virtual void PrintDataTo(StringStream* stream);
 
-  LOperand* context() { return inputs_[0]; }
-  LOperand* constructor() { return inputs_[1]; }
   int arity() const { return hydrogen()->argument_count() - 1; }
 };
 
@@ -1670,10 +1810,12 @@ class LCallRuntime: public LTemplateInstruction<1, 1, 0> {
   explicit LCallRuntime(LOperand* context) {
     inputs_[0] = context;
   }
+
+  LOperand* context() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(CallRuntime, "call-runtime")
   DECLARE_HYDROGEN_ACCESSOR(CallRuntime)
 
-  LOperand* context() { return inputs_[0]; }
   const Runtime::Function* function() const { return hydrogen()->function(); }
   int arity() const { return hydrogen()->argument_count(); }
 };
@@ -1685,6 +1827,8 @@ class LInteger32ToDouble: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(Integer32ToDouble, "int32-to-double")
 };
 
@@ -1696,6 +1840,9 @@ class LUint32ToDouble: public LTemplateInstruction<1, 1, 1> {
     temps_[0] = temp;
   }
 
+  LOperand* value() { return inputs_[0]; }
+  LOperand* temp() { return temps_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(Uint32ToDouble, "uint32-to-double")
 };
 
@@ -1706,6 +1853,8 @@ class LNumberTagI: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(NumberTagI, "number-tag-i")
 };
 
@@ -1717,6 +1866,8 @@ class LNumberTagU: public LTemplateInstruction<1, 1, 1> {
     temps_[0] = temp;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(NumberTagU, "number-tag-u")
 };
 
@@ -1728,6 +1879,9 @@ class LNumberTagD: public LTemplateInstruction<1, 1, 1> {
     temps_[0] = temp;
   }
 
+  LOperand* value() { return inputs_[0]; }
+  LOperand* temp() { return temps_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(NumberTagD, "number-tag-d")
 };
 
@@ -1740,6 +1894,9 @@ class LDoubleToI: public LTemplateInstruction<1, 1, 1> {
     temps_[0] = temp;
   }
 
+  LOperand* value() { return inputs_[0]; }
+  LOperand* temp() { return temps_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(DoubleToI, "double-to-i")
   DECLARE_HYDROGEN_ACCESSOR(UnaryOperation)
 
@@ -1755,6 +1912,9 @@ class LTaggedToI: public LTemplateInstruction<1, 1, 1> {
     temps_[0] = temp;
   }
 
+  LOperand* value() { return inputs_[0]; }
+  LOperand* temp() { return temps_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(TaggedToI, "tagged-to-i")
   DECLARE_HYDROGEN_ACCESSOR(UnaryOperation)
 
@@ -1768,6 +1928,8 @@ class LSmiTag: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(SmiTag, "smi-tag")
 };
 
@@ -1779,6 +1941,9 @@ class LNumberUntagD: public LTemplateInstruction<1, 1, 1> {
     temps_[0] = temp;
   }
 
+  LOperand* value() { return inputs_[0]; }
+  LOperand* temp() { return temps_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(NumberUntagD, "double-untag")
   DECLARE_HYDROGEN_ACCESSOR(Change);
 };
@@ -1791,6 +1956,8 @@ class LSmiUntag: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(SmiUntag, "smi-untag")
 
   bool needs_check() const { return needs_check_; }
@@ -1812,14 +1979,16 @@ class LStoreNamedField: public LTemplateInstruction<0, 2, 2> {
     temps_[1] = temp_map;
   }
 
+  LOperand* object() { return inputs_[0]; }
+  LOperand* value() { return inputs_[1]; }
+  LOperand* temp() { return temps_[0]; }
+  LOperand* temp_map() { return temps_[1]; }
+
   DECLARE_CONCRETE_INSTRUCTION(StoreNamedField, "store-named-field")
   DECLARE_HYDROGEN_ACCESSOR(StoreNamedField)
 
   virtual void PrintDataTo(StringStream* stream);
 
-  LOperand* object() { return inputs_[0]; }
-  LOperand* value() { return inputs_[1]; }
-
   Handle<Object> name() const { return hydrogen()->name(); }
   bool is_in_object() { return hydrogen()->is_in_object(); }
   int offset() { return hydrogen()->offset(); }
@@ -1835,89 +2004,44 @@ class LStoreNamedGeneric: public LTemplateInstruction<0, 3, 0> {
     inputs_[2] = value;
   }
 
+  LOperand* context() { return inputs_[0]; }
+  LOperand* object() { return inputs_[1]; }
+  LOperand* value() { return inputs_[2]; }
+
   DECLARE_CONCRETE_INSTRUCTION(StoreNamedGeneric, "store-named-generic")
   DECLARE_HYDROGEN_ACCESSOR(StoreNamedGeneric)
 
   virtual void PrintDataTo(StringStream* stream);
-
-  LOperand* context() { return inputs_[0]; }
-  LOperand* object() { return inputs_[1]; }
-  LOperand* value() { return inputs_[2]; }
   Handle<Object> name() const { return hydrogen()->name(); }
   StrictModeFlag strict_mode_flag() { return hydrogen()->strict_mode_flag(); }
 };
 
 
-class LStoreKeyedFastElement: public LTemplateInstruction<0, 3, 0> {
+class LStoreKeyed: public LTemplateInstruction<0, 3, 0> {
  public:
-  LStoreKeyedFastElement(LOperand* obj, LOperand* key, LOperand* val) {
+  LStoreKeyed(LOperand* obj, LOperand* key, LOperand* val) {
     inputs_[0] = obj;
     inputs_[1] = key;
     inputs_[2] = val;
   }
 
-  DECLARE_CONCRETE_INSTRUCTION(StoreKeyedFastElement,
-                               "store-keyed-fast-element")
-  DECLARE_HYDROGEN_ACCESSOR(StoreKeyedFastElement)
-
-  virtual void PrintDataTo(StringStream* stream);
-
-  LOperand* object() { return inputs_[0]; }
+  bool is_external() const { return hydrogen()->is_external(); }
+  LOperand* elements() { return inputs_[0]; }
   LOperand* key() { return inputs_[1]; }
   LOperand* value() { return inputs_[2]; }
-  uint32_t additional_index() const { return hydrogen()->index_offset(); }
-};
-
-
-class LStoreKeyedFastDoubleElement: public LTemplateInstruction<0, 3, 0> {
- public:
-  LStoreKeyedFastDoubleElement(LOperand* elements,
-                               LOperand* key,
-                               LOperand* val) {
-    inputs_[0] = elements;
-    inputs_[1] = key;
-    inputs_[2] = val;
+  ElementsKind elements_kind() const {
+    return hydrogen()->elements_kind();
   }
 
-  DECLARE_CONCRETE_INSTRUCTION(StoreKeyedFastDoubleElement,
-                               "store-keyed-fast-double-element")
-  DECLARE_HYDROGEN_ACCESSOR(StoreKeyedFastDoubleElement)
+  DECLARE_CONCRETE_INSTRUCTION(StoreKeyed, "store-keyed")
+  DECLARE_HYDROGEN_ACCESSOR(StoreKeyed)
 
   virtual void PrintDataTo(StringStream* stream);
-
-  LOperand* elements() { return inputs_[0]; }
-  LOperand* key() { return inputs_[1]; }
-  LOperand* value() { return inputs_[2]; }
   uint32_t additional_index() const { return hydrogen()->index_offset(); }
-
   bool NeedsCanonicalization() { return hydrogen()->NeedsCanonicalization(); }
 };
 
 
-class LStoreKeyedSpecializedArrayElement: public LTemplateInstruction<0, 3, 0> {
- public:
-  LStoreKeyedSpecializedArrayElement(LOperand* external_pointer,
-                                     LOperand* key,
-                                     LOperand* val) {
-    inputs_[0] = external_pointer;
-    inputs_[1] = key;
-    inputs_[2] = val;
-  }
-
-  DECLARE_CONCRETE_INSTRUCTION(StoreKeyedSpecializedArrayElement,
-                               "store-keyed-specialized-array-element")
-  DECLARE_HYDROGEN_ACCESSOR(StoreKeyedSpecializedArrayElement)
-
-  LOperand* external_pointer() { return inputs_[0]; }
-  LOperand* key() { return inputs_[1]; }
-  LOperand* value() { return inputs_[2]; }
-  ElementsKind elements_kind() const {
-    return hydrogen()->elements_kind();
-  }
-  uint32_t additional_index() const { return hydrogen()->index_offset(); }
-};
-
-
 class LStoreKeyedGeneric: public LTemplateInstruction<0, 4, 0> {
  public:
   LStoreKeyedGeneric(LOperand* context,
@@ -1930,15 +2054,16 @@ class LStoreKeyedGeneric: public LTemplateInstruction<0, 4, 0> {
     inputs_[3] = value;
   }
 
+  LOperand* context() { return inputs_[0]; }
+  LOperand* object() { return inputs_[1]; }
+  LOperand* key() { return inputs_[2]; }
+  LOperand* value() { return inputs_[3]; }
+
   DECLARE_CONCRETE_INSTRUCTION(StoreKeyedGeneric, "store-keyed-generic")
   DECLARE_HYDROGEN_ACCESSOR(StoreKeyedGeneric)
 
   virtual void PrintDataTo(StringStream* stream);
 
-  LOperand* context() { return inputs_[0]; }
-  LOperand* object() { return inputs_[1]; }
-  LOperand* key() { return inputs_[2]; }
-  LOperand* value() { return inputs_[3]; }
   StrictModeFlag strict_mode_flag() { return hydrogen()->strict_mode_flag(); }
 };
 
@@ -1947,21 +2072,22 @@ class LTransitionElementsKind: public LTemplateInstruction<1, 1, 2> {
  public:
   LTransitionElementsKind(LOperand* object,
                           LOperand* new_map_temp,
-                          LOperand* temp_reg) {
+                          LOperand* temp) {
     inputs_[0] = object;
     temps_[0] = new_map_temp;
-    temps_[1] = temp_reg;
+    temps_[1] = temp;
   }
 
+  LOperand* object() { return inputs_[0]; }
+  LOperand* new_map_temp() { return temps_[0]; }
+  LOperand* temp() { return temps_[1]; }
+
   DECLARE_CONCRETE_INSTRUCTION(TransitionElementsKind,
                                "transition-elements-kind")
   DECLARE_HYDROGEN_ACCESSOR(TransitionElementsKind)
 
   virtual void PrintDataTo(StringStream* stream);
 
-  LOperand* object() { return inputs_[0]; }
-  LOperand* new_map_reg() { return temps_[0]; }
-  LOperand* temp_reg() { return temps_[1]; }
   Handle<Map> original_map() { return hydrogen()->original_map(); }
   Handle<Map> transitioned_map() { return hydrogen()->transitioned_map(); }
 };
@@ -1975,12 +2101,12 @@ class LStringAdd: public LTemplateInstruction<1, 3, 0> {
     inputs_[2] = right;
   }
 
-  DECLARE_CONCRETE_INSTRUCTION(StringAdd, "string-add")
-  DECLARE_HYDROGEN_ACCESSOR(StringAdd)
-
   LOperand* context() { return inputs_[0]; }
   LOperand* left() { return inputs_[1]; }
   LOperand* right() { return inputs_[2]; }
+
+  DECLARE_CONCRETE_INSTRUCTION(StringAdd, "string-add")
+  DECLARE_HYDROGEN_ACCESSOR(StringAdd)
 };
 
 
@@ -1992,12 +2118,12 @@ class LStringCharCodeAt: public LTemplateInstruction<1, 3, 0> {
     inputs_[2] = index;
   }
 
-  DECLARE_CONCRETE_INSTRUCTION(StringCharCodeAt, "string-char-code-at")
-  DECLARE_HYDROGEN_ACCESSOR(StringCharCodeAt)
-
   LOperand* context() { return inputs_[0]; }
   LOperand* string() { return inputs_[1]; }
   LOperand* index() { return inputs_[2]; }
+
+  DECLARE_CONCRETE_INSTRUCTION(StringCharCodeAt, "string-char-code-at")
+  DECLARE_HYDROGEN_ACCESSOR(StringCharCodeAt)
 };
 
 
@@ -2008,11 +2134,11 @@ class LStringCharFromCode: public LTemplateInstruction<1, 2, 0> {
     inputs_[1] = char_code;
   }
 
-  DECLARE_CONCRETE_INSTRUCTION(StringCharFromCode, "string-char-from-code")
-  DECLARE_HYDROGEN_ACCESSOR(StringCharFromCode)
-
   LOperand* context() { return inputs_[0]; }
   LOperand* char_code() { return inputs_[1]; }
+
+  DECLARE_CONCRETE_INSTRUCTION(StringCharFromCode, "string-char-from-code")
+  DECLARE_HYDROGEN_ACCESSOR(StringCharFromCode)
 };
 
 
@@ -2022,10 +2148,10 @@ class LStringLength: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = string;
   }
 
+  LOperand* string() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(StringLength, "string-length")
   DECLARE_HYDROGEN_ACCESSOR(StringLength)
-
-  LOperand* string() { return inputs_[0]; }
 };
 
 
@@ -2049,6 +2175,9 @@ class LCheckInstanceType: public LTemplateInstruction<0, 1, 1> {
     temps_[0] = temp;
   }
 
+  LOperand* value() { return inputs_[0]; }
+  LOperand* temp() { return temps_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(CheckInstanceType, "check-instance-type")
   DECLARE_HYDROGEN_ACCESSOR(CheckInstanceType)
 };
@@ -2060,17 +2189,21 @@ class LCheckMaps: public LTemplateInstruction<0, 1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(CheckMaps, "check-maps")
   DECLARE_HYDROGEN_ACCESSOR(CheckMaps)
 };
 
 
-class LCheckPrototypeMaps: public LTemplateInstruction<0, 0, 1> {
+class LCheckPrototypeMaps: public LTemplateInstruction<1, 0, 1> {
  public:
   explicit LCheckPrototypeMaps(LOperand* temp)  {
     temps_[0] = temp;
   }
 
+  LOperand* temp() { return temps_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(CheckPrototypeMaps, "check-prototype-maps")
   DECLARE_HYDROGEN_ACCESSOR(CheckPrototypeMaps)
 
@@ -2085,6 +2218,8 @@ class LCheckSmi: public LTemplateInstruction<0, 1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(CheckSmi, "check-smi")
 };
 
@@ -2132,6 +2267,8 @@ class LCheckNonSmi: public LTemplateInstruction<0, 1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(CheckNonSmi, "check-non-smi")
 };
 
@@ -2143,10 +2280,11 @@ class LAllocateObject: public LTemplateInstruction<1, 1, 1> {
     temps_[0] = temp;
   }
 
+  LOperand* context() { return inputs_[0]; }
+  LOperand* temp() { return temps_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(AllocateObject, "allocate-object")
   DECLARE_HYDROGEN_ACCESSOR(AllocateObject)
-
-  LOperand* context() { return inputs_[0]; }
 };
 
 
@@ -2223,6 +2361,8 @@ class LToFastProperties: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(ToFastProperties, "to-fast-properties")
   DECLARE_HYDROGEN_ACCESSOR(ToFastProperties)
 };
@@ -2235,6 +2375,9 @@ class LTypeof: public LTemplateInstruction<1, 2, 0> {
     inputs_[1] = value;
   }
 
+  LOperand* context() { return inputs_[0]; }
+  LOperand* value() { return inputs_[1]; }
+
   DECLARE_CONCRETE_INSTRUCTION(Typeof, "typeof")
 };
 
@@ -2245,6 +2388,8 @@ class LTypeofIsAndBranch: public LControlInstruction<1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(TypeofIsAndBranch, "typeof-is-and-branch")
   DECLARE_HYDROGEN_ACCESSOR(TypeofIsAndBranch)
 
@@ -2262,11 +2407,11 @@ class LDeleteProperty: public LTemplateInstruction<1, 3, 0> {
     inputs_[2] = key;
   }
 
-  DECLARE_CONCRETE_INSTRUCTION(DeleteProperty, "delete-property")
-
   LOperand* context() { return inputs_[0]; }
   LOperand* object() { return inputs_[1]; }
   LOperand* key() { return inputs_[2]; }
+
+  DECLARE_CONCRETE_INSTRUCTION(DeleteProperty, "delete-property")
 };
 
 
diff --git a/deps/v8/src/ia32/macro-assembler-ia32.cc b/deps/v8/src/ia32/macro-assembler-ia32.cc
index 9c5f31e2cf..14fb8ca852 100644
--- a/deps/v8/src/ia32/macro-assembler-ia32.cc
+++ b/deps/v8/src/ia32/macro-assembler-ia32.cc
@@ -129,14 +129,22 @@ void MacroAssembler::ClampDoubleToUint8(XMMRegister input_reg,
                                         XMMRegister scratch_reg,
                                         Register result_reg) {
   Label done;
-  ExternalReference zero_ref = ExternalReference::address_of_zero();
-  movdbl(scratch_reg, Operand::StaticVariable(zero_ref));
-  Set(result_reg, Immediate(0));
-  ucomisd(input_reg, scratch_reg);
-  j(below, &done, Label::kNear);
+  Label conv_failure;
+  pxor(scratch_reg, scratch_reg);
   cvtsd2si(result_reg, input_reg);
   test(result_reg, Immediate(0xFFFFFF00));
   j(zero, &done, Label::kNear);
+  cmp(result_reg, Immediate(0x80000000));
+  j(equal, &conv_failure, Label::kNear);
+  mov(result_reg, Immediate(0));
+  setcc(above, result_reg);
+  sub(result_reg, Immediate(1));
+  and_(result_reg, Immediate(255));
+  jmp(&done, Label::kNear);
+  bind(&conv_failure);
+  Set(result_reg, Immediate(0));
+  ucomisd(input_reg, scratch_reg);
+  j(below, &done, Label::kNear);
   Set(result_reg, Immediate(255));
   bind(&done);
 }
@@ -274,9 +282,7 @@ void MacroAssembler::RecordWriteForMap(
   ASSERT(!object.is(value));
   ASSERT(!object.is(address));
   ASSERT(!value.is(address));
-  if (emit_debug_code()) {
-    AbortIfSmi(object);
-  }
+  AssertNotSmi(object);
 
   if (!FLAG_incremental_marking) {
     return;
@@ -323,9 +329,7 @@ void MacroAssembler::RecordWrite(Register object,
   ASSERT(!object.is(value));
   ASSERT(!object.is(address));
   ASSERT(!value.is(address));
-  if (emit_debug_code()) {
-    AbortIfSmi(object);
-  }
+  AssertNotSmi(object);
 
   if (remembered_set_action == OMIT_REMEMBERED_SET &&
       !FLAG_incremental_marking) {
@@ -503,7 +507,8 @@ void MacroAssembler::StoreNumberToDoubleElements(
     Register scratch1,
     XMMRegister scratch2,
     Label* fail,
-    bool specialize_for_processor) {
+    bool specialize_for_processor,
+    int elements_offset) {
   Label smi_value, done, maybe_nan, not_nan, is_nan, have_double_value;
   JumpIfSmi(maybe_number, &smi_value, Label::kNear);
 
@@ -525,12 +530,14 @@ void MacroAssembler::StoreNumberToDoubleElements(
     CpuFeatures::Scope use_sse2(SSE2);
     movdbl(scratch2, FieldOperand(maybe_number, HeapNumber::kValueOffset));
     bind(&have_double_value);
-    movdbl(FieldOperand(elements, key, times_4, FixedDoubleArray::kHeaderSize),
+    movdbl(FieldOperand(elements, key, times_4,
+                        FixedDoubleArray::kHeaderSize - elements_offset),
            scratch2);
   } else {
     fld_d(FieldOperand(maybe_number, HeapNumber::kValueOffset));
     bind(&have_double_value);
-    fstp_d(FieldOperand(elements, key, times_4, FixedDoubleArray::kHeaderSize));
+    fstp_d(FieldOperand(elements, key, times_4,
+                        FixedDoubleArray::kHeaderSize - elements_offset));
   }
   jmp(&done);
 
@@ -557,13 +564,15 @@ void MacroAssembler::StoreNumberToDoubleElements(
   if (CpuFeatures::IsSupported(SSE2) && specialize_for_processor) {
     CpuFeatures::Scope fscope(SSE2);
     cvtsi2sd(scratch2, scratch1);
-    movdbl(FieldOperand(elements, key, times_4, FixedDoubleArray::kHeaderSize),
+    movdbl(FieldOperand(elements, key, times_4,
+                        FixedDoubleArray::kHeaderSize - elements_offset),
            scratch2);
   } else {
     push(scratch1);
     fild_s(Operand(esp, 0));
     pop(scratch1);
-    fstp_d(FieldOperand(elements, key, times_4, FixedDoubleArray::kHeaderSize));
+    fstp_d(FieldOperand(elements, key, times_4,
+                        FixedDoubleArray::kHeaderSize - elements_offset));
   }
   bind(&done);
 }
@@ -668,36 +677,44 @@ void MacroAssembler::FCmp() {
 }
 
 
-void MacroAssembler::AbortIfNotNumber(Register object) {
-  Label ok;
-  JumpIfSmi(object, &ok);
-  cmp(FieldOperand(object, HeapObject::kMapOffset),
-      isolate()->factory()->heap_number_map());
-  Assert(equal, "Operand not a number");
-  bind(&ok);
+void MacroAssembler::AssertNumber(Register object) {
+  if (emit_debug_code()) {
+    Label ok;
+    JumpIfSmi(object, &ok);
+    cmp(FieldOperand(object, HeapObject::kMapOffset),
+        isolate()->factory()->heap_number_map());
+    Check(equal, "Operand not a number");
+    bind(&ok);
+  }
 }
 
 
-void MacroAssembler::AbortIfNotSmi(Register object) {
-  test(object, Immediate(kSmiTagMask));
-  Assert(equal, "Operand is not a smi");
+void MacroAssembler::AssertSmi(Register object) {
+  if (emit_debug_code()) {
+    test(object, Immediate(kSmiTagMask));
+    Check(equal, "Operand is not a smi");
+  }
 }
 
 
-void MacroAssembler::AbortIfNotString(Register object) {
-  test(object, Immediate(kSmiTagMask));
-  Assert(not_equal, "Operand is not a string");
-  push(object);
-  mov(object, FieldOperand(object, HeapObject::kMapOffset));
-  CmpInstanceType(object, FIRST_NONSTRING_TYPE);
-  pop(object);
-  Assert(below, "Operand is not a string");
+void MacroAssembler::AssertString(Register object) {
+  if (emit_debug_code()) {
+    test(object, Immediate(kSmiTagMask));
+    Check(not_equal, "Operand is a smi and not a string");
+    push(object);
+    mov(object, FieldOperand(object, HeapObject::kMapOffset));
+    CmpInstanceType(object, FIRST_NONSTRING_TYPE);
+    pop(object);
+    Check(below, "Operand is not a string");
+  }
 }
 
 
-void MacroAssembler::AbortIfSmi(Register object) {
-  test(object, Immediate(kSmiTagMask));
-  Assert(not_equal, "Operand is a smi");
+void MacroAssembler::AssertNotSmi(Register object) {
+  if (emit_debug_code()) {
+    test(object, Immediate(kSmiTagMask));
+    Check(not_equal, "Operand is a smi");
+  }
 }
 
 
@@ -1441,14 +1458,14 @@ void MacroAssembler::AllocateAsciiString(Register result,
                                          Label* gc_required) {
   // Calculate the number of bytes needed for the characters in the string while
   // observing object alignment.
-  ASSERT((SeqAsciiString::kHeaderSize & kObjectAlignmentMask) == 0);
+  ASSERT((SeqOneByteString::kHeaderSize & kObjectAlignmentMask) == 0);
   mov(scratch1, length);
   ASSERT(kCharSize == 1);
   add(scratch1, Immediate(kObjectAlignmentMask));
   and_(scratch1, Immediate(~kObjectAlignmentMask));
 
   // Allocate ASCII string in new space.
-  AllocateInNewSpace(SeqAsciiString::kHeaderSize,
+  AllocateInNewSpace(SeqOneByteString::kHeaderSize,
                      times_1,
                      scratch1,
                      result,
@@ -1476,7 +1493,7 @@ void MacroAssembler::AllocateAsciiString(Register result,
   ASSERT(length > 0);
 
   // Allocate ASCII string in new space.
-  AllocateInNewSpace(SeqAsciiString::SizeFor(length),
+  AllocateInNewSpace(SeqOneByteString::SizeFor(length),
                      result,
                      scratch1,
                      scratch2,
@@ -1903,9 +1920,25 @@ void MacroAssembler::CallApiFunctionAndReturn(Address function_address,
   mov(edi, Operand::StaticVariable(limit_address));
   add(Operand::StaticVariable(level_address), Immediate(1));
 
+  if (FLAG_log_timer_events) {
+    FrameScope frame(this, StackFrame::MANUAL);
+    PushSafepointRegisters();
+    PrepareCallCFunction(0, eax);
+    CallCFunction(ExternalReference::log_enter_external_function(isolate()), 0);
+    PopSafepointRegisters();
+  }
+
   // Call the api function.
   call(function_address, RelocInfo::RUNTIME_ENTRY);
 
+  if (FLAG_log_timer_events) {
+    FrameScope frame(this, StackFrame::MANUAL);
+    PushSafepointRegisters();
+    PrepareCallCFunction(0, eax);
+    CallCFunction(ExternalReference::log_leave_external_function(isolate()), 0);
+    PopSafepointRegisters();
+  }
+
   if (!kReturnHandlesDirectly) {
     // PrepareCallApiFunction saved pointer to the output slot into
     // callee-save register esi.
@@ -2573,19 +2606,13 @@ void MacroAssembler::Abort(const char* msg) {
 
 void MacroAssembler::LoadInstanceDescriptors(Register map,
                                              Register descriptors) {
-  Register temp = descriptors;
-  mov(temp, FieldOperand(map, Map::kTransitionsOrBackPointerOffset));
+  mov(descriptors, FieldOperand(map, Map::kDescriptorsOffset));
+}
 
-  Label ok, fail;
-  CheckMap(temp,
-           isolate()->factory()->fixed_array_map(),
-           &fail,
-           DONT_DO_SMI_CHECK);
-  mov(descriptors, FieldOperand(temp, TransitionArray::kDescriptorsOffset));
-  jmp(&ok);
-  bind(&fail);
-  mov(descriptors, isolate()->factory()->empty_descriptor_array());
-  bind(&ok);
+
+void MacroAssembler::NumberOfOwnDescriptors(Register dst, Register map) {
+  mov(dst, FieldOperand(map, Map::kBitField3Offset));
+  DecodeField<Map::NumberOfOwnDescriptorsBits>(dst);
 }
 
 
@@ -2609,7 +2636,7 @@ void MacroAssembler::JumpIfInstanceTypeIsNotSequentialAscii(
   }
   and_(scratch,
        kIsNotStringMask | kStringRepresentationMask | kStringEncodingMask);
-  cmp(scratch, kStringTag | kSeqStringTag | kAsciiStringTag);
+  cmp(scratch, kStringTag | kSeqStringTag | kOneByteStringTag);
   j(not_equal, failure);
 }
 
@@ -2632,15 +2659,17 @@ void MacroAssembler::JumpIfNotBothSequentialAsciiStrings(Register object1,
   movzx_b(scratch2, FieldOperand(scratch2, Map::kInstanceTypeOffset));
 
   // Check that both are flat ASCII strings.
-  const int kFlatAsciiStringMask =
-      kIsNotStringMask | kStringRepresentationMask | kStringEncodingMask;
+  const int kFlatAsciiStringMask = kIsNotStringMask | kStringRepresentationMask
+          | kStringEncodingMask | kAsciiDataHintTag;
   const int kFlatAsciiStringTag = ASCII_STRING_TYPE;
   // Interleave bits from both instance types and compare them in one check.
-  ASSERT_EQ(0, kFlatAsciiStringMask & (kFlatAsciiStringMask << 3));
+  ASSERT_EQ(0, kFlatAsciiStringMask & (kFlatAsciiStringMask << 8));
+  ASSERT_EQ(ASCII_STRING_TYPE, ASCII_STRING_TYPE & kFlatAsciiStringMask);
   and_(scratch1, kFlatAsciiStringMask);
   and_(scratch2, kFlatAsciiStringMask);
-  lea(scratch1, Operand(scratch1, scratch2, times_8, 0));
-  cmp(scratch1, kFlatAsciiStringTag | (kFlatAsciiStringTag << 3));
+  shl(scratch1, 8);
+  or_(scratch1, scratch2);
+  cmp(scratch1, kFlatAsciiStringTag | (kFlatAsciiStringTag << 8));
   j(not_equal, failure);
 }
 
@@ -2900,15 +2929,15 @@ void MacroAssembler::EnsureNotWhite(
 
   bind(&not_external);
   // Sequential string, either ASCII or UC16.
-  ASSERT(kAsciiStringTag == 0x04);
+  ASSERT(kOneByteStringTag == 0x04);
   and_(length, Immediate(kStringEncodingMask));
   xor_(length, Immediate(kStringEncodingMask));
   add(length, Immediate(0x04));
   // Value now either 4 (if ASCII) or 8 (if UC16), i.e., char-size shifted
   // by 2. If we multiply the string length as smi by this, it still
   // won't overflow a 32-bit value.
-  ASSERT_EQ(SeqAsciiString::kMaxSize, SeqTwoByteString::kMaxSize);
-  ASSERT(SeqAsciiString::kMaxSize <=
+  ASSERT_EQ(SeqOneByteString::kMaxSize, SeqTwoByteString::kMaxSize);
+  ASSERT(SeqOneByteString::kMaxSize <=
          static_cast<int>(0xffffffffu >> (2 + kSmiTagSize)));
   imul(length, FieldOperand(value, String::kLengthOffset));
   shr(length, 2 + kSmiTagSize + kSmiShiftSize);
diff --git a/deps/v8/src/ia32/macro-assembler-ia32.h b/deps/v8/src/ia32/macro-assembler-ia32.h
index 7d475e7d7e..7abb29b10a 100644
--- a/deps/v8/src/ia32/macro-assembler-ia32.h
+++ b/deps/v8/src/ia32/macro-assembler-ia32.h
@@ -388,7 +388,8 @@ class MacroAssembler: public Assembler {
                                    Register scratch1,
                                    XMMRegister scratch2,
                                    Label* fail,
-                                   bool specialize_for_processor);
+                                   bool specialize_for_processor,
+                                   int offset = 0);
 
   // Compare an object's map with the specified map and its transitioned
   // elements maps if mode is ALLOW_ELEMENT_TRANSITION_MAPS. FLAGS are set with
@@ -493,27 +494,28 @@ class MacroAssembler: public Assembler {
 
   void LoadInstanceDescriptors(Register map, Register descriptors);
   void EnumLength(Register dst, Register map);
+  void NumberOfOwnDescriptors(Register dst, Register map);
 
   template<typename Field>
   void DecodeField(Register reg) {
-    static const int full_shift = Field::kShift + kSmiTagSize;
-    static const int low_mask = Field::kMask >> Field::kShift;
-    sar(reg, full_shift);
-    and_(reg, Immediate(low_mask));
+    static const int shift = Field::kShift;
+    static const int mask = (Field::kMask >> Field::kShift) << kSmiTagSize;
+    sar(reg, shift);
+    and_(reg, Immediate(mask));
   }
   void LoadPowerOf2(XMMRegister dst, Register scratch, int power);
 
-  // Abort execution if argument is not a number. Used in debug code.
-  void AbortIfNotNumber(Register object);
+  // Abort execution if argument is not a number, enabled via --debug-code.
+  void AssertNumber(Register object);
 
-  // Abort execution if argument is not a smi. Used in debug code.
-  void AbortIfNotSmi(Register object);
+  // Abort execution if argument is not a smi, enabled via --debug-code.
+  void AssertSmi(Register object);
 
-  // Abort execution if argument is a smi. Used in debug code.
-  void AbortIfSmi(Register object);
+  // Abort execution if argument is a smi, enabled via --debug-code.
+  void AssertNotSmi(Register object);
 
-  // Abort execution if argument is a string. Used in debug code.
-  void AbortIfNotString(Register object);
+  // Abort execution if argument is not a string, enabled via --debug-code.
+  void AssertString(Register object);
 
   // ---------------------------------------------------------------------------
   // Exception handling
@@ -787,6 +789,7 @@ class MacroAssembler: public Assembler {
 
   // Push a handle value.
   void Push(Handle<Object> handle) { push(Immediate(handle)); }
+  void Push(Smi* smi) { Push(Handle<Smi>(smi)); }
 
   Handle<Object> CodeObject() {
     ASSERT(!code_object_.is_null());
diff --git a/deps/v8/src/ia32/regexp-macro-assembler-ia32.cc b/deps/v8/src/ia32/regexp-macro-assembler-ia32.cc
index 622dc4254d..af6a9e44ba 100644
--- a/deps/v8/src/ia32/regexp-macro-assembler-ia32.cc
+++ b/deps/v8/src/ia32/regexp-macro-assembler-ia32.cc
@@ -1197,7 +1197,7 @@ int RegExpMacroAssemblerIA32::CheckStackGuardState(Address* return_address,
   Handle<String> subject(frame_entry<String*>(re_frame, kInputString));
 
   // Current string.
-  bool is_ascii = subject->IsAsciiRepresentationUnderneath();
+  bool is_ascii = subject->IsOneByteRepresentationUnderneath();
 
   ASSERT(re_code->instruction_start() <= *return_address);
   ASSERT(*return_address <=
@@ -1228,7 +1228,7 @@ int RegExpMacroAssemblerIA32::CheckStackGuardState(Address* return_address,
   }
 
   // String might have changed.
-  if (subject_tmp->IsAsciiRepresentation() != is_ascii) {
+  if (subject_tmp->IsOneByteRepresentation() != is_ascii) {
     // If we changed between an ASCII and an UC16 string, the specialized
     // code cannot be used, and we need to restart regexp matching from
     // scratch (including, potentially, compiling a new version of the code).
diff --git a/deps/v8/src/ia32/stub-cache-ia32.cc b/deps/v8/src/ia32/stub-cache-ia32.cc
index f5e2d05892..c8695c572c 100644
--- a/deps/v8/src/ia32/stub-cache-ia32.cc
+++ b/deps/v8/src/ia32/stub-cache-ia32.cc
@@ -376,18 +376,23 @@ void StubCompiler::GenerateFastPropertyLoad(MacroAssembler* masm,
                                             Register dst,
                                             Register src,
                                             Handle<JSObject> holder,
-                                            int index) {
-  // Adjust for the number of properties stored in the holder.
-  index -= holder->map()->inobject_properties();
-  if (index < 0) {
-    // Get the property straight out of the holder.
-    int offset = holder->map()->instance_size() + (index * kPointerSize);
+                                            PropertyIndex index) {
+  if (index.is_header_index()) {
+    int offset = index.header_index() * kPointerSize;
     __ mov(dst, FieldOperand(src, offset));
   } else {
-    // Calculate the offset into the properties array.
-    int offset = index * kPointerSize + FixedArray::kHeaderSize;
-    __ mov(dst, FieldOperand(src, JSObject::kPropertiesOffset));
-    __ mov(dst, FieldOperand(dst, offset));
+    // Adjust for the number of properties stored in the holder.
+    int slot = index.field_index() - holder->map()->inobject_properties();
+    if (slot < 0) {
+      // Get the property straight out of the holder.
+      int offset = holder->map()->instance_size() + (slot * kPointerSize);
+      __ mov(dst, FieldOperand(src, offset));
+    } else {
+      // Calculate the offset into the properties array.
+      int offset = slot * kPointerSize + FixedArray::kHeaderSize;
+      __ mov(dst, FieldOperand(src, JSObject::kPropertiesOffset));
+      __ mov(dst, FieldOperand(dst, offset));
+    }
   }
 }
 
@@ -1036,7 +1041,7 @@ void StubCompiler::GenerateLoadField(Handle<JSObject> object,
                                      Register scratch1,
                                      Register scratch2,
                                      Register scratch3,
-                                     int index,
+                                     PropertyIndex index,
                                      Handle<String> name,
                                      Label* miss) {
   // Check that the receiver isn't a smi.
@@ -1423,7 +1428,7 @@ void CallStubCompiler::GenerateMissBranch() {
 
 Handle<Code> CallStubCompiler::CompileCallField(Handle<JSObject> object,
                                                 Handle<JSObject> holder,
-                                                int index,
+                                                PropertyIndex index,
                                                 Handle<String> name) {
   // ----------- S t a t e -------------
   //  -- ecx                 : name
@@ -1518,7 +1523,7 @@ Handle<Code> CallStubCompiler::CompileArrayPushCall(
     Label call_builtin;
 
     if (argc == 1) {  // Otherwise fall through to call builtin.
-      Label attempt_to_grow_elements, with_write_barrier;
+      Label attempt_to_grow_elements, with_write_barrier, check_double;
 
       // Get the elements array of the object.
       __ mov(edi, FieldOperand(edx, JSArray::kElementsOffset));
@@ -1526,7 +1531,7 @@ Handle<Code> CallStubCompiler::CompileArrayPushCall(
       // Check that the elements are in fast mode and writable.
       __ cmp(FieldOperand(edi, HeapObject::kMapOffset),
              Immediate(factory()->fixed_array_map()));
-      __ j(not_equal, &call_builtin);
+      __ j(not_equal, &check_double);
 
       // Get the array's length into eax and calculate new length.
       __ mov(eax, FieldOperand(edx, JSArray::kLengthOffset));
@@ -1557,17 +1562,49 @@ Handle<Code> CallStubCompiler::CompileArrayPushCall(
 
       __ ret((argc + 1) * kPointerSize);
 
+      __ bind(&check_double);
+
+
+      // Check that the elements are in double mode.
+      __ cmp(FieldOperand(edi, HeapObject::kMapOffset),
+             Immediate(factory()->fixed_double_array_map()));
+      __ j(not_equal, &call_builtin);
+
+      // Get the array's length into eax and calculate new length.
+      __ mov(eax, FieldOperand(edx, JSArray::kLengthOffset));
+      STATIC_ASSERT(kSmiTagSize == 1);
+      STATIC_ASSERT(kSmiTag == 0);
+      __ add(eax, Immediate(Smi::FromInt(argc)));
+
+      // Get the elements' length into ecx.
+      __ mov(ecx, FieldOperand(edi, FixedArray::kLengthOffset));
+
+      // Check if we could survive without allocation.
+      __ cmp(eax, ecx);
+      __ j(greater, &call_builtin);
+
+      __ mov(ecx, Operand(esp, argc * kPointerSize));
+      __ StoreNumberToDoubleElements(
+          ecx, edi, eax, ecx, xmm0, &call_builtin, true, argc * kDoubleSize);
+
+      // Save new length.
+      __ mov(FieldOperand(edx, JSArray::kLengthOffset), eax);
+      __ ret((argc + 1) * kPointerSize);
+
       __ bind(&with_write_barrier);
 
       __ mov(ebx, FieldOperand(edx, HeapObject::kMapOffset));
 
-      if (FLAG_smi_only_arrays  && !FLAG_trace_elements_transitions) {
+      if (FLAG_smi_only_arrays && !FLAG_trace_elements_transitions) {
         Label fast_object, not_fast_object;
         __ CheckFastObjectElements(ebx, &not_fast_object, Label::kNear);
         __ jmp(&fast_object);
         // In case of fast smi-only, convert to fast object, otherwise bail out.
         __ bind(&not_fast_object);
         __ CheckFastSmiElements(ebx, &call_builtin);
+        __ cmp(FieldOperand(ecx, HeapObject::kMapOffset),
+               Immediate(factory()->heap_number_map()));
+        __ j(equal, &call_builtin);
         // edi: elements array
         // edx: receiver
         // ebx: map
@@ -2956,7 +2993,7 @@ Handle<Code> LoadStubCompiler::CompileLoadNonexistent(Handle<String> name,
 
 Handle<Code> LoadStubCompiler::CompileLoadField(Handle<JSObject> object,
                                                 Handle<JSObject> holder,
-                                                int index,
+                                                PropertyIndex index,
                                                 Handle<String> name) {
   // ----------- S t a t e -------------
   //  -- ecx    : name
@@ -3156,7 +3193,7 @@ Handle<Code> LoadStubCompiler::CompileLoadGlobal(
 Handle<Code> KeyedLoadStubCompiler::CompileLoadField(Handle<String> name,
                                                      Handle<JSObject> receiver,
                                                      Handle<JSObject> holder,
-                                                     int index) {
+                                                     PropertyIndex index) {
   // ----------- S t a t e -------------
   //  -- ecx    : key
   //  -- edx    : receiver
@@ -3421,6 +3458,7 @@ Handle<Code> ConstructStubCompiler::CompileConstructStub(
 #endif
 
   // Load the initial map and verify that it is in fact a map.
+  // edi: constructor
   __ mov(ebx, FieldOperand(edi, JSFunction::kPrototypeOrInitialMapOffset));
   // Will both indicate a NULL and a Smi.
   __ JumpIfSmi(ebx, &generic_stub_call);
@@ -3429,19 +3467,23 @@ Handle<Code> ConstructStubCompiler::CompileConstructStub(
 
 #ifdef DEBUG
   // Cannot construct functions this way.
-  // edi: constructor
   // ebx: initial map
   __ CmpInstanceType(ebx, JS_FUNCTION_TYPE);
-  __ Assert(not_equal, "Function constructed by construct stub.");
+  __ Check(not_equal, "Function constructed by construct stub.");
 #endif
 
   // Now allocate the JSObject on the heap by moving the new space allocation
   // top forward.
-  // edi: constructor
   // ebx: initial map
+  ASSERT(function->has_initial_map());
+  int instance_size = function->initial_map()->instance_size();
+#ifdef DEBUG
   __ movzx_b(ecx, FieldOperand(ebx, Map::kInstanceSizeOffset));
   __ shl(ecx, kPointerSizeLog2);
-  __ AllocateInNewSpace(ecx, edx, ecx, no_reg,
+  __ cmp(ecx, Immediate(instance_size));
+  __ Check(equal, "Instance size of initial map changed.");
+#endif
+  __ AllocateInNewSpace(instance_size, edx, ecx, no_reg,
                         &generic_stub_call, NO_ALLOCATION_FLAGS);
 
   // Allocated the JSObject, now initialize the fields and add the heap tag.
@@ -3501,7 +3543,6 @@ Handle<Code> ConstructStubCompiler::CompileConstructStub(
   }
 
   // Fill the unused in-object property fields with undefined.
-  ASSERT(function->has_initial_map());
   for (int i = shared->this_property_assignments_count();
        i < function->initial_map()->inobject_properties();
        i++) {
@@ -4312,13 +4353,22 @@ void KeyedStoreStubCompiler::GenerateStoreFastDoubleElement(
     // ecx: key
     // edx: receiver
     // edi: elements
-    // Initialize the new FixedDoubleArray. Leave elements unitialized for
-    // efficiency, they are guaranteed to be initialized before use.
+    // Initialize the new FixedDoubleArray.
     __ mov(FieldOperand(edi, JSObject::kMapOffset),
            Immediate(masm->isolate()->factory()->fixed_double_array_map()));
     __ mov(FieldOperand(edi, FixedDoubleArray::kLengthOffset),
            Immediate(Smi::FromInt(JSArray::kPreallocatedArrayElements)));
 
+    __ StoreNumberToDoubleElements(eax, edi, ecx, ebx, xmm0,
+                                   &transition_elements_kind, true);
+
+    for (int i = 1; i < JSArray::kPreallocatedArrayElements; i++) {
+      int offset = FixedDoubleArray::OffsetOfElementAt(i);
+      __ mov(FieldOperand(edi, offset), Immediate(kHoleNanLower32));
+      __ mov(FieldOperand(edi, offset + kPointerSize),
+             Immediate(kHoleNanUpper32));
+    }
+
     // Install the new backing store in the JSArray.
     __ mov(FieldOperand(edx, JSObject::kElementsOffset), edi);
     __ RecordWriteField(edx, JSObject::kElementsOffset, edi, ebx,
@@ -4328,7 +4378,7 @@ void KeyedStoreStubCompiler::GenerateStoreFastDoubleElement(
     __ add(FieldOperand(edx, JSArray::kLengthOffset),
            Immediate(Smi::FromInt(1)));
     __ mov(edi, FieldOperand(edx, JSObject::kElementsOffset));
-    __ jmp(&finish_store);
+    __ ret(0);
 
     __ bind(&check_capacity);
     // eax: value
diff --git a/deps/v8/src/ic-inl.h b/deps/v8/src/ic-inl.h
index 0e41093e5c..77f409a1ef 100644
--- a/deps/v8/src/ic-inl.h
+++ b/deps/v8/src/ic-inl.h
@@ -40,10 +40,11 @@ namespace internal {
 
 Address IC::address() const {
   // Get the address of the call.
-  Address result = pc() - Assembler::kCallTargetAddressOffset;
+  Address result = Assembler::target_address_from_return_address(pc());
 
 #ifdef ENABLE_DEBUGGER_SUPPORT
-  Debug* debug = Isolate::Current()->debug();
+  ASSERT(Isolate::Current() == isolate());
+  Debug* debug = isolate()->debug();
   // First check if any break points are active if not just return the address
   // of the call.
   if (!debug->has_break_points()) return result;
diff --git a/deps/v8/src/ic.cc b/deps/v8/src/ic.cc
index b902b5386d..bf2a649f7f 100644
--- a/deps/v8/src/ic.cc
+++ b/deps/v8/src/ic.cc
@@ -158,7 +158,7 @@ Address IC::OriginalCodeAddress() const {
   // Get the address of the call site in the active code. This is the
   // place where the call to DebugBreakXXX is and where the IC
   // normally would be.
-  Address addr = pc() - Assembler::kCallTargetAddressOffset;
+  Address addr = Assembler::target_address_from_return_address(pc());
   // Return the address in the original code. This is the place where
   // the call which has been overwritten by the DebugBreakXXX resides
   // and the place where the inline cache system should look.
@@ -310,7 +310,8 @@ void IC::PostPatching(Address address, Code* target, Code* old_target) {
   if (FLAG_type_info_threshold == 0 && !FLAG_watch_ic_patching) {
     return;
   }
-  Code* host = target->GetHeap()->isolate()->
+  Isolate* isolate = target->GetHeap()->isolate();
+  Code* host = isolate->
       inner_pointer_to_code_cache()->GetCacheEntry(address)->code;
   if (host->kind() != Code::FUNCTION) return;
 
@@ -333,7 +334,7 @@ void IC::PostPatching(Address address, Code* target, Code* old_target) {
   }
   if (FLAG_watch_ic_patching) {
     host->set_profiler_ticks(0);
-    Isolate::Current()->runtime_profiler()->NotifyICChanged();
+    isolate->runtime_profiler()->NotifyICChanged();
   }
   // TODO(2029): When an optimized function is patched, it would
   // be nice to propagate the corresponding type information to its
@@ -414,11 +415,13 @@ void KeyedStoreIC::Clear(Address address, Code* target) {
 
 
 void CompareIC::Clear(Address address, Code* target) {
-  // Only clear ICCompareStubs, we currently cannot clear generic CompareStubs.
-  if (target->major_key() != CodeStub::CompareIC) return;
+  ASSERT(target->major_key() == CodeStub::CompareIC);
+  CompareIC::State handler_state;
+  Token::Value op;
+  ICCompareStub::DecodeMinorKey(target->stub_info(), NULL, NULL,
+                                &handler_state, &op);
   // Only clear CompareICs that can retain objects.
-  if (target->compare_state() != KNOWN_OBJECTS) return;
-  Token::Value op = CompareIC::ComputeOperation(target);
+  if (handler_state != KNOWN_OBJECTS) return;
   SetTargetAtAddress(address, GetRawUninitialized(op));
   PatchInlinedSmiCode(address, DISABLE_INLINED_SMI_CHECK);
 }
@@ -646,7 +649,7 @@ Handle<Code> CallICBase::ComputeMonomorphicStub(LookupResult* lookup,
   Handle<JSObject> holder(lookup->holder());
   switch (lookup->type()) {
     case FIELD: {
-      int index = lookup->GetFieldIndex();
+      PropertyIndex index = lookup->GetFieldIndex();
       return isolate()->stub_cache()->ComputeCallField(
           argc, kind_, extra_state, name, object, holder, index);
     }
@@ -1377,6 +1380,11 @@ MaybeObject* StoreIC::Store(State state,
     return *value;
   }
 
+  // Observed objects are always modified through the runtime.
+  if (FLAG_harmony_observation && receiver->map()->is_observed()) {
+    return receiver->SetProperty(*name, *value, NONE, strict_mode);
+  }
+
   // Use specialized code for setting the length of arrays with fast
   // properties.  Slow properties might indicate redefinition of the
   // length property.
@@ -1462,11 +1470,9 @@ void StoreIC::UpdateCaches(LookupResult* lookup,
   Handle<Code> code;
   switch (type) {
     case FIELD:
-      code = isolate()->stub_cache()->ComputeStoreField(name,
-                                                        receiver,
-                                                        lookup->GetFieldIndex(),
-                                                        Handle<Map>::null(),
-                                                        strict_mode);
+      code = isolate()->stub_cache()->ComputeStoreField(
+          name, receiver, lookup->GetFieldIndex().field_index(),
+          Handle<Map>::null(), strict_mode);
       break;
     case NORMAL:
       if (receiver->IsGlobalObject()) {
@@ -1902,7 +1908,8 @@ MaybeObject* KeyedStoreIC::Store(State state,
     }
 
     // Update inline cache and stub cache.
-    if (FLAG_use_ic && !receiver->IsJSGlobalProxy()) {
+    if (FLAG_use_ic && !receiver->IsJSGlobalProxy() &&
+        !(FLAG_harmony_observation && receiver->map()->is_observed())) {
       LookupResult lookup(isolate());
       if (LookupForWrite(receiver, name, &lookup)) {
         UpdateCaches(&lookup, state, strict_mode, receiver, name, value);
@@ -1914,8 +1921,10 @@ MaybeObject* KeyedStoreIC::Store(State state,
   }
 
   // Do not use ICs for objects that require access checks (including
-  // the global object).
-  bool use_ic = FLAG_use_ic && !object->IsAccessCheckNeeded();
+  // the global object), or are observed.
+  bool use_ic = FLAG_use_ic && !object->IsAccessCheckNeeded() &&
+      !(FLAG_harmony_observation && object->IsJSObject() &&
+          JSObject::cast(*object)->map()->is_observed());
   ASSERT(!(use_ic && object->IsJSGlobalProxy()));
 
   if (use_ic) {
@@ -1973,7 +1982,7 @@ void KeyedStoreIC::UpdateCaches(LookupResult* lookup,
   switch (type) {
     case FIELD:
       code = isolate()->stub_cache()->ComputeKeyedStoreField(
-          name, receiver, lookup->GetFieldIndex(),
+          name, receiver, lookup->GetFieldIndex().field_index(),
           Handle<Map>::null(), strict_mode);
       break;
     case TRANSITION: {
@@ -2307,11 +2316,10 @@ const char* BinaryOpIC::GetName(TypeInfo type_info) {
   switch (type_info) {
     case UNINITIALIZED: return "Uninitialized";
     case SMI: return "SMI";
-    case INT32: return "Int32s";
-    case HEAP_NUMBER: return "HeapNumbers";
+    case INT32: return "Int32";
+    case HEAP_NUMBER: return "HeapNumber";
     case ODDBALL: return "Oddball";
-    case BOTH_STRING: return "BothStrings";
-    case STRING: return "Strings";
+    case STRING: return "String";
     case GENERIC: return "Generic";
     default: return "Invalid";
   }
@@ -2326,7 +2334,6 @@ BinaryOpIC::State BinaryOpIC::ToState(TypeInfo type_info) {
     case INT32:
     case HEAP_NUMBER:
     case ODDBALL:
-    case BOTH_STRING:
     case STRING:
       return MONOMORPHIC;
     case GENERIC:
@@ -2337,58 +2344,6 @@ BinaryOpIC::State BinaryOpIC::ToState(TypeInfo type_info) {
 }
 
 
-BinaryOpIC::TypeInfo BinaryOpIC::JoinTypes(BinaryOpIC::TypeInfo x,
-                                           BinaryOpIC::TypeInfo y) {
-  if (x == UNINITIALIZED) return y;
-  if (y == UNINITIALIZED) return x;
-  if (x == y) return x;
-  if (x == BOTH_STRING && y == STRING) return STRING;
-  if (x == STRING && y == BOTH_STRING) return STRING;
-  if (x == STRING || x == BOTH_STRING || y == STRING || y == BOTH_STRING) {
-    return GENERIC;
-  }
-  if (x > y) return x;
-  return y;
-}
-
-
-BinaryOpIC::TypeInfo BinaryOpIC::GetTypeInfo(Handle<Object> left,
-                                             Handle<Object> right) {
-  ::v8::internal::TypeInfo left_type =
-      ::v8::internal::TypeInfo::TypeFromValue(left);
-  ::v8::internal::TypeInfo right_type =
-      ::v8::internal::TypeInfo::TypeFromValue(right);
-
-  if (left_type.IsSmi() && right_type.IsSmi()) {
-    return SMI;
-  }
-
-  if (left_type.IsInteger32() && right_type.IsInteger32()) {
-    // Platforms with 32-bit Smis have no distinct INT32 type.
-    if (kSmiValueSize == 32) return SMI;
-    return INT32;
-  }
-
-  if (left_type.IsNumber() && right_type.IsNumber()) {
-    return HEAP_NUMBER;
-  }
-
-  // Patching for fast string ADD makes sense even if only one of the
-  // arguments is a string.
-  if (left_type.IsString())  {
-    return right_type.IsString() ? BOTH_STRING : STRING;
-  } else if (right_type.IsString()) {
-    return STRING;
-  }
-
-  // Check for oddball objects.
-  if (left->IsUndefined() && right->IsNumber()) return ODDBALL;
-  if (left->IsNumber() && right->IsUndefined()) return ODDBALL;
-
-  return GENERIC;
-}
-
-
 RUNTIME_FUNCTION(MaybeObject*, UnaryOp_Patch) {
   ASSERT(args.length() == 4);
 
@@ -2440,25 +2395,72 @@ RUNTIME_FUNCTION(MaybeObject*, UnaryOp_Patch) {
   return *result;
 }
 
+
+static BinaryOpIC::TypeInfo TypeInfoFromValue(Handle<Object> value,
+                                              Token::Value op) {
+  ::v8::internal::TypeInfo type =
+      ::v8::internal::TypeInfo::TypeFromValue(value);
+  if (type.IsSmi()) return BinaryOpIC::SMI;
+  if (type.IsInteger32()) {
+    if (kSmiValueSize == 32) return BinaryOpIC::SMI;
+    return BinaryOpIC::INT32;
+  }
+  if (type.IsNumber()) return BinaryOpIC::HEAP_NUMBER;
+  if (type.IsString()) return BinaryOpIC::STRING;
+  if (value->IsUndefined()) {
+    if (op == Token::BIT_AND ||
+        op == Token::BIT_OR ||
+        op == Token::BIT_XOR ||
+        op == Token::SAR ||
+        op == Token::SHL ||
+        op == Token::SHR) {
+      if (kSmiValueSize == 32) return BinaryOpIC::SMI;
+      return BinaryOpIC::INT32;
+    }
+    return BinaryOpIC::ODDBALL;
+  }
+  return BinaryOpIC::GENERIC;
+}
+
+
+static BinaryOpIC::TypeInfo InputState(BinaryOpIC::TypeInfo old_type,
+                                       Handle<Object> value,
+                                       Token::Value op) {
+  BinaryOpIC::TypeInfo new_type = TypeInfoFromValue(value, op);
+  if (old_type == BinaryOpIC::STRING) {
+    if (new_type == BinaryOpIC::STRING) return new_type;
+    return BinaryOpIC::GENERIC;
+  }
+  return Max(old_type, new_type);
+}
+
+
 RUNTIME_FUNCTION(MaybeObject*, BinaryOp_Patch) {
-  ASSERT(args.length() == 5);
+  ASSERT(args.length() == 3);
 
   HandleScope scope(isolate);
   Handle<Object> left = args.at<Object>(0);
   Handle<Object> right = args.at<Object>(1);
   int key = args.smi_at(2);
-  Token::Value op = static_cast<Token::Value>(args.smi_at(3));
-  BinaryOpIC::TypeInfo previous_type =
-      static_cast<BinaryOpIC::TypeInfo>(args.smi_at(4));
+  Token::Value op = BinaryOpStub::decode_op_from_minor_key(key);
+  BinaryOpIC::TypeInfo previous_left, previous_right, unused_previous_result;
+  BinaryOpStub::decode_types_from_minor_key(
+      key, &previous_left, &previous_right, &unused_previous_result);
 
-  BinaryOpIC::TypeInfo type = BinaryOpIC::GetTypeInfo(left, right);
-  type = BinaryOpIC::JoinTypes(type, previous_type);
+  BinaryOpIC::TypeInfo new_left = InputState(previous_left, left, op);
+  BinaryOpIC::TypeInfo new_right = InputState(previous_right, right, op);
   BinaryOpIC::TypeInfo result_type = BinaryOpIC::UNINITIALIZED;
-  if ((type == BinaryOpIC::STRING || type == BinaryOpIC::BOTH_STRING) &&
+
+  // STRING is only used for ADD operations.
+  if ((new_left == BinaryOpIC::STRING || new_right == BinaryOpIC::STRING) &&
       op != Token::ADD) {
-    type = BinaryOpIC::GENERIC;
+    new_left = new_right = BinaryOpIC::GENERIC;
   }
-  if (type == BinaryOpIC::SMI && previous_type == BinaryOpIC::SMI) {
+
+  BinaryOpIC::TypeInfo new_overall = Max(new_left, new_right);
+  BinaryOpIC::TypeInfo previous_overall = Max(previous_left, previous_right);
+
+  if (new_overall == BinaryOpIC::SMI && previous_overall == BinaryOpIC::SMI) {
     if (op == Token::DIV ||
         op == Token::MUL ||
         op == Token::SHR ||
@@ -2473,26 +2475,35 @@ RUNTIME_FUNCTION(MaybeObject*, BinaryOp_Patch) {
       result_type = BinaryOpIC::INT32;
     }
   }
-  if (type == BinaryOpIC::INT32 && previous_type == BinaryOpIC::INT32) {
-    // We must be here because an operation on two INT32 types overflowed.
-    result_type = BinaryOpIC::HEAP_NUMBER;
+  if (new_overall == BinaryOpIC::INT32 &&
+      previous_overall == BinaryOpIC::INT32) {
+    if (new_left == previous_left && new_right == previous_right) {
+      result_type = BinaryOpIC::HEAP_NUMBER;
+    }
   }
 
-  BinaryOpStub stub(key, type, result_type);
+  BinaryOpStub stub(key, new_left, new_right, result_type);
   Handle<Code> code = stub.GetCode();
   if (!code.is_null()) {
+#ifdef DEBUG
     if (FLAG_trace_ic) {
-      PrintF("[BinaryOpIC (%s->(%s->%s))#%s]\n",
-             BinaryOpIC::GetName(previous_type),
-             BinaryOpIC::GetName(type),
+      PrintF("[BinaryOpIC in ");
+      JavaScriptFrame::PrintTop(stdout, false, true);
+      PrintF(" ((%s+%s)->((%s+%s)->%s))#%s @ %p]\n",
+             BinaryOpIC::GetName(previous_left),
+             BinaryOpIC::GetName(previous_right),
+             BinaryOpIC::GetName(new_left),
+             BinaryOpIC::GetName(new_right),
              BinaryOpIC::GetName(result_type),
-             Token::Name(op));
+             Token::Name(op),
+             static_cast<void*>(*code));
     }
+#endif
     BinaryOpIC ic(isolate);
     ic.patch(*code);
 
     // Activate inlined smi code.
-    if (previous_type == BinaryOpIC::UNINITIALIZED) {
+    if (previous_overall == BinaryOpIC::UNINITIALIZED) {
       PatchInlinedSmiCode(ic.address(), ENABLE_INLINED_SMI_CHECK);
     }
   }
@@ -2555,43 +2566,28 @@ RUNTIME_FUNCTION(MaybeObject*, BinaryOp_Patch) {
 
 
 Code* CompareIC::GetRawUninitialized(Token::Value op) {
-  ICCompareStub stub(op, UNINITIALIZED);
+  ICCompareStub stub(op, UNINITIALIZED, UNINITIALIZED, UNINITIALIZED);
   Code* code = NULL;
-  CHECK(stub.FindCodeInCache(&code));
+  CHECK(stub.FindCodeInCache(&code, Isolate::Current()));
   return code;
 }
 
 
 Handle<Code> CompareIC::GetUninitialized(Token::Value op) {
-  ICCompareStub stub(op, UNINITIALIZED);
+  ICCompareStub stub(op, UNINITIALIZED, UNINITIALIZED, UNINITIALIZED);
   return stub.GetCode();
 }
 
 
-CompareIC::State CompareIC::ComputeState(Code* target) {
-  int key = target->major_key();
-  if (key == CodeStub::Compare) return GENERIC;
-  ASSERT(key == CodeStub::CompareIC);
-  return static_cast<State>(target->compare_state());
-}
-
-
-Token::Value CompareIC::ComputeOperation(Code* target) {
-  ASSERT(target->major_key() == CodeStub::CompareIC);
-  return static_cast<Token::Value>(
-      target->compare_operation() + Token::EQ);
-}
-
-
 const char* CompareIC::GetStateName(State state) {
   switch (state) {
     case UNINITIALIZED: return "UNINITIALIZED";
-    case SMIS: return "SMIS";
-    case HEAP_NUMBERS: return "HEAP_NUMBERS";
-    case OBJECTS: return "OBJECTS";
+    case SMI: return "SMI";
+    case HEAP_NUMBER: return "HEAP_NUMBER";
+    case OBJECT: return "OBJECTS";
     case KNOWN_OBJECTS: return "KNOWN_OBJECTS";
-    case SYMBOLS: return "SYMBOLS";
-    case STRINGS: return "STRINGS";
+    case SYMBOL: return "SYMBOL";
+    case STRING: return "STRING";
     case GENERIC: return "GENERIC";
     default:
       UNREACHABLE();
@@ -2600,28 +2596,67 @@ const char* CompareIC::GetStateName(State state) {
 }
 
 
-CompareIC::State CompareIC::TargetState(State state,
+static CompareIC::State InputState(CompareIC::State old_state,
+                                   Handle<Object> value) {
+  switch (old_state) {
+    case CompareIC::UNINITIALIZED:
+      if (value->IsSmi()) return CompareIC::SMI;
+      if (value->IsHeapNumber()) return CompareIC::HEAP_NUMBER;
+      if (value->IsSymbol()) return CompareIC::SYMBOL;
+      if (value->IsString()) return CompareIC::STRING;
+      if (value->IsJSObject()) return CompareIC::OBJECT;
+      break;
+    case CompareIC::SMI:
+      if (value->IsSmi()) return CompareIC::SMI;
+      if (value->IsHeapNumber()) return CompareIC::HEAP_NUMBER;
+      break;
+    case CompareIC::HEAP_NUMBER:
+      if (value->IsNumber()) return CompareIC::HEAP_NUMBER;
+      break;
+    case CompareIC::SYMBOL:
+      if (value->IsSymbol()) return CompareIC::SYMBOL;
+      if (value->IsString()) return CompareIC::STRING;
+      break;
+    case CompareIC::STRING:
+      if (value->IsSymbol() || value->IsString()) return CompareIC::STRING;
+      break;
+    case CompareIC::OBJECT:
+      if (value->IsJSObject()) return CompareIC::OBJECT;
+      break;
+    case CompareIC::GENERIC:
+      break;
+    case CompareIC::KNOWN_OBJECTS:
+      UNREACHABLE();
+      break;
+  }
+  return CompareIC::GENERIC;
+}
+
+
+CompareIC::State CompareIC::TargetState(State old_state,
+                                        State old_left,
+                                        State old_right,
                                         bool has_inlined_smi_code,
                                         Handle<Object> x,
                                         Handle<Object> y) {
-  switch (state) {
+  switch (old_state) {
     case UNINITIALIZED:
-      if (x->IsSmi() && y->IsSmi()) return SMIS;
-      if (x->IsNumber() && y->IsNumber()) return HEAP_NUMBERS;
+      if (x->IsSmi() && y->IsSmi()) return SMI;
+      if (x->IsNumber() && y->IsNumber()) return HEAP_NUMBER;
       if (Token::IsOrderedRelationalCompareOp(op_)) {
         // Ordered comparisons treat undefined as NaN, so the
         // HEAP_NUMBER stub will do the right thing.
         if ((x->IsNumber() && y->IsUndefined()) ||
             (y->IsNumber() && x->IsUndefined())) {
-          return HEAP_NUMBERS;
+          return HEAP_NUMBER;
         }
       }
       if (x->IsSymbol() && y->IsSymbol()) {
         // We compare symbols as strings if we need to determine
         // the order in a non-equality compare.
-        return Token::IsEqualityOp(op_) ? SYMBOLS : STRINGS;
+        return Token::IsEqualityOp(op_) ? SYMBOL : STRING;
       }
-      if (x->IsString() && y->IsString()) return STRINGS;
+      if (x->IsString() && y->IsString()) return STRING;
       if (!Token::IsEqualityOp(op_)) return GENERIC;
       if (x->IsJSObject() && y->IsJSObject()) {
         if (Handle<JSObject>::cast(x)->map() ==
@@ -2629,30 +2664,70 @@ CompareIC::State CompareIC::TargetState(State state,
             Token::IsEqualityOp(op_)) {
           return KNOWN_OBJECTS;
         } else {
-          return OBJECTS;
+          return OBJECT;
         }
       }
       return GENERIC;
-    case SMIS:
-      return has_inlined_smi_code && x->IsNumber() && y->IsNumber()
-          ? HEAP_NUMBERS
+    case SMI:
+      return x->IsNumber() && y->IsNumber()
+          ? HEAP_NUMBER
           : GENERIC;
-    case SYMBOLS:
+    case SYMBOL:
       ASSERT(Token::IsEqualityOp(op_));
-      return x->IsString() && y->IsString() ? STRINGS : GENERIC;
-    case HEAP_NUMBERS:
-    case STRINGS:
-    case OBJECTS:
+      return x->IsString() && y->IsString() ? STRING : GENERIC;
+    case HEAP_NUMBER:
+      if (old_left == SMI && x->IsHeapNumber()) return HEAP_NUMBER;
+      if (old_right == SMI && y->IsHeapNumber()) return HEAP_NUMBER;
+    case STRING:
+    case OBJECT:
     case KNOWN_OBJECTS:
     case GENERIC:
       return GENERIC;
   }
   UNREACHABLE();
-  return GENERIC;
+  return GENERIC;  // Make the compiler happy.
+}
+
+
+void CompareIC::UpdateCaches(Handle<Object> x, Handle<Object> y) {
+  HandleScope scope;
+  State previous_left, previous_right, previous_state;
+  ICCompareStub::DecodeMinorKey(target()->stub_info(), &previous_left,
+                                &previous_right, &previous_state, NULL);
+  State new_left = InputState(previous_left, x);
+  State new_right = InputState(previous_right, y);
+  State state = TargetState(previous_state, previous_left, previous_right,
+                            HasInlinedSmiCode(address()), x, y);
+  ICCompareStub stub(op_, new_left, new_right, state);
+  if (state == KNOWN_OBJECTS) {
+    stub.set_known_map(Handle<Map>(Handle<JSObject>::cast(x)->map()));
+  }
+  set_target(*stub.GetCode());
+
+#ifdef DEBUG
+  if (FLAG_trace_ic) {
+    PrintF("[CompareIC in ");
+    JavaScriptFrame::PrintTop(stdout, false, true);
+    PrintF(" ((%s+%s=%s)->(%s+%s=%s))#%s @ %p]\n",
+           GetStateName(previous_left),
+           GetStateName(previous_right),
+           GetStateName(previous_state),
+           GetStateName(new_left),
+           GetStateName(new_right),
+           GetStateName(state),
+           Token::Name(op_),
+           static_cast<void*>(*stub.GetCode()));
+  }
+#endif
+
+  // Activate inlined smi code.
+  if (previous_state == UNINITIALIZED) {
+    PatchInlinedSmiCode(address(), ENABLE_INLINED_SMI_CHECK);
+  }
 }
 
 
-// Used from ic_<arch>.cc.
+// Used from ICCompareStub::GenerateMiss in code-stubs-<arch>.cc.
 RUNTIME_FUNCTION(Code*, CompareIC_Miss) {
   NoHandleAllocation na;
   ASSERT(args.length() == 3);
diff --git a/deps/v8/src/ic.h b/deps/v8/src/ic.h
index c86f316ef3..bfccd10a6a 100644
--- a/deps/v8/src/ic.h
+++ b/deps/v8/src/ic.h
@@ -631,6 +631,18 @@ class StoreIC: public IC {
 };
 
 
+enum KeyedStoreCheckMap {
+  kDontCheckMap,
+  kCheckMap
+};
+
+
+enum KeyedStoreIncrementLength {
+  kDontIncrementLength,
+  kIncrementLength
+};
+
+
 class KeyedStoreIC: public KeyedIC {
  public:
   explicit KeyedStoreIC(Isolate* isolate) : KeyedIC(isolate) {
@@ -638,7 +650,7 @@ class KeyedStoreIC: public KeyedIC {
   }
 
   MUST_USE_RESULT MaybeObject* Store(State state,
-                                   StrictModeFlag strict_mode,
+                                     StrictModeFlag strict_mode,
                                      Handle<Object> object,
                                      Handle<Object> name,
                                      Handle<Object> value,
@@ -759,8 +771,7 @@ class BinaryOpIC: public IC {
     INT32,
     HEAP_NUMBER,
     ODDBALL,
-    BOTH_STRING,  // Only used for addition operation.
-    STRING,  // Only used for addition operation.  At least one string operand.
+    STRING,  // Only used for addition operation.
     GENERIC
   };
 
@@ -771,10 +782,6 @@ class BinaryOpIC: public IC {
   static const char* GetName(TypeInfo type_info);
 
   static State ToState(TypeInfo type_info);
-
-  static TypeInfo GetTypeInfo(Handle<Object> left, Handle<Object> right);
-
-  static TypeInfo JoinTypes(TypeInfo x, TypeInfo y);
 };
 
 
@@ -782,11 +789,11 @@ class CompareIC: public IC {
  public:
   enum State {
     UNINITIALIZED,
-    SMIS,
-    HEAP_NUMBERS,
-    SYMBOLS,
-    STRINGS,
-    OBJECTS,
+    SMI,
+    HEAP_NUMBER,
+    SYMBOL,
+    STRING,
+    OBJECT,
     KNOWN_OBJECTS,
     GENERIC
   };
@@ -797,27 +804,27 @@ class CompareIC: public IC {
   // Update the inline cache for the given operands.
   void UpdateCaches(Handle<Object> x, Handle<Object> y);
 
+
   // Factory method for getting an uninitialized compare stub.
   static Handle<Code> GetUninitialized(Token::Value op);
 
   // Helper function for computing the condition for a compare operation.
   static Condition ComputeCondition(Token::Value op);
 
-  // Helper function for determining the state of a compare IC.
-  static State ComputeState(Code* target);
-
-  // Helper function for determining the operation a compare IC is for.
-  static Token::Value ComputeOperation(Code* target);
-
   static const char* GetStateName(State state);
 
  private:
-  State TargetState(State state, bool has_inlined_smi_code,
-                    Handle<Object> x, Handle<Object> y);
+  static bool HasInlinedSmiCode(Address address);
+
+  State TargetState(State old_state,
+                    State old_left,
+                    State old_right,
+                    bool has_inlined_smi_code,
+                    Handle<Object> x,
+                    Handle<Object> y);
 
   bool strict() const { return op_ == Token::EQ_STRICT; }
   Condition GetCondition() const { return ComputeCondition(op_); }
-  State GetState() { return ComputeState(target()); }
 
   static Code* GetRawUninitialized(Token::Value op);
 
diff --git a/deps/v8/src/incremental-marking-inl.h b/deps/v8/src/incremental-marking-inl.h
index 5c2c8ab431..1c30383d52 100644
--- a/deps/v8/src/incremental-marking-inl.h
+++ b/deps/v8/src/incremental-marking-inl.h
@@ -37,18 +37,31 @@ namespace internal {
 bool IncrementalMarking::BaseRecordWrite(HeapObject* obj,
                                          Object** slot,
                                          Object* value) {
-  MarkBit value_bit = Marking::MarkBitFrom(HeapObject::cast(value));
+  HeapObject* value_heap_obj = HeapObject::cast(value);
+  MarkBit value_bit = Marking::MarkBitFrom(value_heap_obj);
   if (Marking::IsWhite(value_bit)) {
     MarkBit obj_bit = Marking::MarkBitFrom(obj);
     if (Marking::IsBlack(obj_bit)) {
-      BlackToGreyAndUnshift(obj, obj_bit);
-      RestartIfNotMarking();
+      MemoryChunk* chunk = MemoryChunk::FromAddress(obj->address());
+      if (chunk->IsFlagSet(MemoryChunk::HAS_PROGRESS_BAR)) {
+        if (chunk->IsLeftOfProgressBar(slot)) {
+          WhiteToGreyAndPush(value_heap_obj, value_bit);
+          RestartIfNotMarking();
+        } else {
+          return false;
+        }
+      } else {
+        BlackToGreyAndUnshift(obj, obj_bit);
+        RestartIfNotMarking();
+        return false;
+      }
+    } else {
+      return false;
     }
-
-    // Object is either grey or white.  It will be scanned if survives.
-    return false;
   }
-  return true;
+  if (!is_compacting_) return false;
+  MarkBit obj_bit = Marking::MarkBitFrom(obj);
+  return Marking::IsBlack(obj_bit);
 }
 
 
@@ -81,6 +94,10 @@ void IncrementalMarking::RecordWrites(HeapObject* obj) {
   if (IsMarking()) {
     MarkBit obj_bit = Marking::MarkBitFrom(obj);
     if (Marking::IsBlack(obj_bit)) {
+      MemoryChunk* chunk = MemoryChunk::FromAddress(obj->address());
+      if (chunk->IsFlagSet(MemoryChunk::HAS_PROGRESS_BAR)) {
+        chunk->set_progress_bar(0);
+      }
       BlackToGreyAndUnshift(obj, obj_bit);
       RestartIfNotMarking();
     }
@@ -109,7 +126,7 @@ void IncrementalMarking::BlackToGreyAndUnshift(HeapObject* obj,
       if (FLAG_trace_gc) {
         PrintPID("Hurrying incremental marking because of lack of progress\n");
       }
-      allocation_marking_factor_ = kMaxAllocationMarkingFactor;
+      marking_speed_ = kMaxMarkingSpeed;
     }
   }
 
@@ -123,27 +140,6 @@ void IncrementalMarking::WhiteToGreyAndPush(HeapObject* obj, MarkBit mark_bit) {
 }
 
 
-bool IncrementalMarking::MarkObjectAndPush(HeapObject* obj) {
-  MarkBit mark_bit = Marking::MarkBitFrom(obj);
-  if (!mark_bit.Get()) {
-    WhiteToGreyAndPush(obj, mark_bit);
-    return true;
-  }
-  return false;
-}
-
-
-bool IncrementalMarking::MarkObjectWithoutPush(HeapObject* obj) {
-  MarkBit mark_bit = Marking::MarkBitFrom(obj);
-  if (!mark_bit.Get()) {
-    mark_bit.Set();
-    MemoryChunk::IncrementLiveBytesFromGC(obj->address(), obj->Size());
-    return true;
-  }
-  return false;
-}
-
-
 } }  // namespace v8::internal
 
 #endif  // V8_INCREMENTAL_MARKING_INL_H_
diff --git a/deps/v8/src/incremental-marking.cc b/deps/v8/src/incremental-marking.cc
index 57f18b2e75..ef7dbe05ff 100644
--- a/deps/v8/src/incremental-marking.cc
+++ b/deps/v8/src/incremental-marking.cc
@@ -44,7 +44,6 @@ IncrementalMarking::IncrementalMarking(Heap* heap)
       state_(STOPPED),
       marking_deque_memory_(NULL),
       marking_deque_memory_committed_(false),
-      marker_(this, heap->mark_compact_collector()),
       steps_count_(0),
       steps_took_(0),
       longest_step_(0.0),
@@ -53,7 +52,7 @@ IncrementalMarking::IncrementalMarking(Heap* heap)
       steps_count_since_last_gc_(0),
       steps_took_since_last_gc_(0),
       should_hurry_(false),
-      allocation_marking_factor_(0),
+      marking_speed_(0),
       allocated_(0),
       no_marking_scope_depth_(0) {
 }
@@ -67,7 +66,7 @@ void IncrementalMarking::TearDown() {
 void IncrementalMarking::RecordWriteSlow(HeapObject* obj,
                                          Object** slot,
                                          Object* value) {
-  if (BaseRecordWrite(obj, slot, value) && is_compacting_ && slot != NULL) {
+  if (BaseRecordWrite(obj, slot, value) && slot != NULL) {
     MarkBit obj_bit = Marking::MarkBitFrom(obj);
     if (Marking::IsBlack(obj_bit)) {
       // Object is not going to be rescanned we need to record the slot.
@@ -79,29 +78,43 @@ void IncrementalMarking::RecordWriteSlow(HeapObject* obj,
 
 
 void IncrementalMarking::RecordWriteFromCode(HeapObject* obj,
-                                             Object* value,
+                                             Object** slot,
                                              Isolate* isolate) {
   ASSERT(obj->IsHeapObject());
-
-  // Fast cases should already be covered by RecordWriteStub.
-  ASSERT(value->IsHeapObject());
-  ASSERT(!value->IsHeapNumber());
-  ASSERT(!value->IsString() ||
-         value->IsConsString() ||
-         value->IsSlicedString());
-  ASSERT(Marking::IsWhite(Marking::MarkBitFrom(HeapObject::cast(value))));
-
   IncrementalMarking* marking = isolate->heap()->incremental_marking();
   ASSERT(!marking->is_compacting_);
-  marking->RecordWrite(obj, NULL, value);
+
+  MemoryChunk* chunk = MemoryChunk::FromAddress(obj->address());
+  int counter = chunk->write_barrier_counter();
+  if (counter < (MemoryChunk::kWriteBarrierCounterGranularity / 2)) {
+    marking->write_barriers_invoked_since_last_step_ +=
+        MemoryChunk::kWriteBarrierCounterGranularity -
+            chunk->write_barrier_counter();
+    chunk->set_write_barrier_counter(
+        MemoryChunk::kWriteBarrierCounterGranularity);
+  }
+
+  marking->RecordWrite(obj, slot, *slot);
 }
 
 
 void IncrementalMarking::RecordWriteForEvacuationFromCode(HeapObject* obj,
                                                           Object** slot,
                                                           Isolate* isolate) {
+  ASSERT(obj->IsHeapObject());
   IncrementalMarking* marking = isolate->heap()->incremental_marking();
   ASSERT(marking->is_compacting_);
+
+  MemoryChunk* chunk = MemoryChunk::FromAddress(obj->address());
+  int counter = chunk->write_barrier_counter();
+  if (counter < (MemoryChunk::kWriteBarrierCounterGranularity / 2)) {
+    marking->write_barriers_invoked_since_last_step_ +=
+        MemoryChunk::kWriteBarrierCounterGranularity -
+            chunk->write_barrier_counter();
+    chunk->set_write_barrier_counter(
+        MemoryChunk::kWriteBarrierCounterGranularity);
+  }
+
   marking->RecordWrite(obj, slot, *slot);
 }
 
@@ -127,9 +140,9 @@ void IncrementalMarking::RecordCodeTargetPatch(Address pc, HeapObject* value) {
 
 
 void IncrementalMarking::RecordWriteOfCodeEntrySlow(JSFunction* host,
-                                                Object** slot,
-                                                Code* value) {
-  if (BaseRecordWrite(host, slot, value) && is_compacting_) {
+                                                    Object** slot,
+                                                    Code* value) {
+  if (BaseRecordWrite(host, slot, value)) {
     ASSERT(slot != NULL);
     heap_->mark_compact_collector()->
         RecordCodeEntrySlot(reinterpret_cast<Address>(slot), value);
@@ -162,17 +175,98 @@ void IncrementalMarking::RecordWriteIntoCodeSlow(HeapObject* obj,
 }
 
 
+static void MarkObjectGreyDoNotEnqueue(Object* obj) {
+  if (obj->IsHeapObject()) {
+    HeapObject* heap_obj = HeapObject::cast(obj);
+    MarkBit mark_bit = Marking::MarkBitFrom(HeapObject::cast(obj));
+    if (Marking::IsBlack(mark_bit)) {
+      MemoryChunk::IncrementLiveBytesFromGC(heap_obj->address(),
+                                            -heap_obj->Size());
+    }
+    Marking::AnyToGrey(mark_bit);
+  }
+}
+
+
+static inline void MarkBlackOrKeepGrey(HeapObject* heap_object,
+                                       MarkBit mark_bit,
+                                       int size) {
+  ASSERT(!Marking::IsImpossible(mark_bit));
+  if (mark_bit.Get()) return;
+  mark_bit.Set();
+  MemoryChunk::IncrementLiveBytesFromGC(heap_object->address(), size);
+  ASSERT(Marking::IsBlack(mark_bit));
+}
+
+
+static inline void MarkBlackOrKeepBlack(HeapObject* heap_object,
+                                        MarkBit mark_bit,
+                                        int size) {
+  ASSERT(!Marking::IsImpossible(mark_bit));
+  if (Marking::IsBlack(mark_bit)) return;
+  Marking::MarkBlack(mark_bit);
+  MemoryChunk::IncrementLiveBytesFromGC(heap_object->address(), size);
+  ASSERT(Marking::IsBlack(mark_bit));
+}
+
+
 class IncrementalMarkingMarkingVisitor
     : public StaticMarkingVisitor<IncrementalMarkingMarkingVisitor> {
  public:
   static void Initialize() {
     StaticMarkingVisitor<IncrementalMarkingMarkingVisitor>::Initialize();
+    table_.Register(kVisitFixedArray, &VisitFixedArrayIncremental);
+    table_.Register(kVisitNativeContext, &VisitNativeContextIncremental);
+    table_.Register(kVisitJSRegExp, &VisitJSRegExp);
+  }
+
+  static const int kProgressBarScanningChunk = 32 * 1024;
 
-    table_.Register(kVisitSharedFunctionInfo, &VisitSharedFunctionInfo);
+  static void VisitFixedArrayIncremental(Map* map, HeapObject* object) {
+    MemoryChunk* chunk = MemoryChunk::FromAddress(object->address());
+    // TODO(mstarzinger): Move setting of the flag to the allocation site of
+    // the array. The visitor should just check the flag.
+    if (FLAG_use_marking_progress_bar &&
+        chunk->owner()->identity() == LO_SPACE) {
+      chunk->SetFlag(MemoryChunk::HAS_PROGRESS_BAR);
+    }
+    if (chunk->IsFlagSet(MemoryChunk::HAS_PROGRESS_BAR)) {
+      Heap* heap = map->GetHeap();
+      // When using a progress bar for large fixed arrays, scan only a chunk of
+      // the array and try to push it onto the marking deque again until it is
+      // fully scanned. Fall back to scanning it through to the end in case this
+      // fails because of a full deque.
+      int object_size = FixedArray::BodyDescriptor::SizeOf(map, object);
+      int start_offset = Max(FixedArray::BodyDescriptor::kStartOffset,
+                             chunk->progress_bar());
+      int end_offset = Min(object_size,
+                           start_offset + kProgressBarScanningChunk);
+      bool scan_until_end = false;
+      do {
+        VisitPointersWithAnchor(heap,
+                                HeapObject::RawField(object, 0),
+                                HeapObject::RawField(object, start_offset),
+                                HeapObject::RawField(object, end_offset));
+        start_offset = end_offset;
+        end_offset = Min(object_size, end_offset + kProgressBarScanningChunk);
+        scan_until_end = heap->incremental_marking()->marking_deque()->IsFull();
+      } while (scan_until_end && start_offset < object_size);
+      chunk->set_progress_bar(start_offset);
+      if (start_offset < object_size) {
+        heap->incremental_marking()->marking_deque()->UnshiftGrey(object);
+      }
+    } else {
+      FixedArrayVisitor::Visit(map, object);
+    }
+  }
 
-    table_.Register(kVisitJSFunction, &VisitJSFunction);
+  static void VisitNativeContextIncremental(Map* map, HeapObject* object) {
+    Context* context = Context::cast(object);
 
-    table_.Register(kVisitJSRegExp, &VisitJSRegExp);
+    // We will mark cache black with a separate pass
+    // when we finish marking.
+    MarkObjectGreyDoNotEnqueue(context->normalized_map_cache());
+    VisitNativeContext(map, context);
   }
 
   static void VisitJSWeakMap(Map* map, HeapObject* object) {
@@ -182,31 +276,7 @@ class IncrementalMarkingMarkingVisitor
                   HeapObject::RawField(object, JSWeakMap::kSize));
   }
 
-  static void VisitSharedFunctionInfo(Map* map, HeapObject* object) {
-    Heap* heap = map->GetHeap();
-    SharedFunctionInfo* shared = SharedFunctionInfo::cast(object);
-    if (shared->ic_age() != heap->global_ic_age()) {
-      shared->ResetForNewContext(heap->global_ic_age());
-    }
-    FixedBodyVisitor<IncrementalMarkingMarkingVisitor,
-                     SharedFunctionInfo::BodyDescriptor,
-                     void>::Visit(map, object);
-  }
-
-  static inline void VisitJSFunction(Map* map, HeapObject* object) {
-    Heap* heap = map->GetHeap();
-    // Iterate over all fields in the body but take care in dealing with
-    // the code entry and skip weak fields.
-    VisitPointers(heap,
-                  HeapObject::RawField(object, JSFunction::kPropertiesOffset),
-                  HeapObject::RawField(object, JSFunction::kCodeEntryOffset));
-    VisitCodeEntry(heap, object->address() + JSFunction::kCodeEntryOffset);
-    VisitPointers(heap,
-                  HeapObject::RawField(object,
-                      JSFunction::kCodeEntryOffset + kPointerSize),
-                  HeapObject::RawField(object,
-                      JSFunction::kNonWeakFieldsEndOffset));
-  }
+  static void BeforeVisitingSharedFunctionInfo(HeapObject* object) {}
 
   INLINE(static void VisitPointer(Heap* heap, Object** p)) {
     Object* obj = *p;
@@ -226,27 +296,51 @@ class IncrementalMarkingMarkingVisitor
     }
   }
 
+  INLINE(static void VisitPointersWithAnchor(Heap* heap,
+                                             Object** anchor,
+                                             Object** start,
+                                             Object** end)) {
+    for (Object** p = start; p < end; p++) {
+      Object* obj = *p;
+      if (obj->NonFailureIsHeapObject()) {
+        heap->mark_compact_collector()->RecordSlot(anchor, p, obj);
+        MarkObject(heap, obj);
+      }
+    }
+  }
+
+  // Marks the object grey and pushes it on the marking stack.
   INLINE(static void MarkObject(Heap* heap, Object* obj)) {
     HeapObject* heap_object = HeapObject::cast(obj);
     MarkBit mark_bit = Marking::MarkBitFrom(heap_object);
     if (mark_bit.data_only()) {
-      if (heap->incremental_marking()->MarkBlackOrKeepGrey(mark_bit)) {
-        MemoryChunk::IncrementLiveBytesFromGC(heap_object->address(),
-                                              heap_object->Size());
-      }
+      MarkBlackOrKeepGrey(heap_object, mark_bit, heap_object->Size());
     } else if (Marking::IsWhite(mark_bit)) {
       heap->incremental_marking()->WhiteToGreyAndPush(heap_object, mark_bit);
     }
   }
+
+  // Marks the object black without pushing it on the marking stack.
+  // Returns true if object needed marking and false otherwise.
+  INLINE(static bool MarkObjectWithoutPush(Heap* heap, Object* obj)) {
+    HeapObject* heap_object = HeapObject::cast(obj);
+    MarkBit mark_bit = Marking::MarkBitFrom(heap_object);
+    if (Marking::IsWhite(mark_bit)) {
+      mark_bit.Set();
+      MemoryChunk::IncrementLiveBytesFromGC(heap_object->address(),
+                                            heap_object->Size());
+      return true;
+    }
+    return false;
+  }
 };
 
 
 class IncrementalMarkingRootMarkingVisitor : public ObjectVisitor {
  public:
-  IncrementalMarkingRootMarkingVisitor(Heap* heap,
-                                       IncrementalMarking* incremental_marking)
-      : heap_(heap),
-        incremental_marking_(incremental_marking) {
+  explicit IncrementalMarkingRootMarkingVisitor(
+      IncrementalMarking* incremental_marking)
+      : incremental_marking_(incremental_marking) {
   }
 
   void VisitPointer(Object** p) {
@@ -265,10 +359,7 @@ class IncrementalMarkingRootMarkingVisitor : public ObjectVisitor {
     HeapObject* heap_object = HeapObject::cast(obj);
     MarkBit mark_bit = Marking::MarkBitFrom(heap_object);
     if (mark_bit.data_only()) {
-      if (incremental_marking_->MarkBlackOrKeepGrey(mark_bit)) {
-          MemoryChunk::IncrementLiveBytesFromGC(heap_object->address(),
-                                                heap_object->Size());
-      }
+      MarkBlackOrKeepGrey(heap_object, mark_bit, heap_object->Size());
     } else {
       if (Marking::IsWhite(mark_bit)) {
         incremental_marking_->WhiteToGreyAndPush(heap_object, mark_bit);
@@ -276,7 +367,6 @@ class IncrementalMarkingRootMarkingVisitor : public ObjectVisitor {
     }
   }
 
-  Heap* heap_;
   IncrementalMarking* incremental_marking_;
 };
 
@@ -494,19 +584,6 @@ void IncrementalMarking::Start() {
 }
 
 
-static void MarkObjectGreyDoNotEnqueue(Object* obj) {
-  if (obj->IsHeapObject()) {
-    HeapObject* heap_obj = HeapObject::cast(obj);
-    MarkBit mark_bit = Marking::MarkBitFrom(HeapObject::cast(obj));
-    if (Marking::IsBlack(mark_bit)) {
-      MemoryChunk::IncrementLiveBytesFromGC(heap_obj->address(),
-                                            -heap_obj->Size());
-    }
-    Marking::AnyToGrey(mark_bit);
-  }
-}
-
-
 void IncrementalMarking::StartMarking(CompactionFlag flag) {
   if (FLAG_trace_incremental_marking) {
     PrintF("[IncrementalMarking] Start marking\n");
@@ -533,8 +610,8 @@ void IncrementalMarking::StartMarking(CompactionFlag flag) {
 
   ActivateIncrementalWriteBarrier();
 
-#ifdef DEBUG
   // Marking bits are cleared by the sweeper.
+#ifdef VERIFY_HEAP
   if (FLAG_verify_heap) {
     heap_->mark_compact_collector()->VerifyMarkbitsAreClean();
   }
@@ -550,7 +627,7 @@ void IncrementalMarking::StartMarking(CompactionFlag flag) {
   }
 
   // Mark strong roots grey.
-  IncrementalMarkingRootMarkingVisitor visitor(heap_, this);
+  IncrementalMarkingRootMarkingVisitor visitor(this);
   heap_->IterateStrongRoots(&visitor, VISIT_ONLY_STRONG);
 
   // Ready to start incremental marking.
@@ -606,8 +683,11 @@ void IncrementalMarking::UpdateMarkingDequeAfterScavenge() {
       ASSERT(new_top != marking_deque_.bottom());
 #ifdef DEBUG
         MarkBit mark_bit = Marking::MarkBitFrom(obj);
+        MemoryChunk* chunk = MemoryChunk::FromAddress(obj->address());
         ASSERT(Marking::IsGrey(mark_bit) ||
-               (obj->IsFiller() && Marking::IsWhite(mark_bit)));
+               (obj->IsFiller() && Marking::IsWhite(mark_bit)) ||
+               (chunk->IsFlagSet(MemoryChunk::HAS_PROGRESS_BAR) &&
+                Marking::IsBlack(mark_bit)));
 #endif
     }
   }
@@ -619,6 +699,58 @@ void IncrementalMarking::UpdateMarkingDequeAfterScavenge() {
 }
 
 
+void IncrementalMarking::VisitObject(Map* map, HeapObject* obj, int size) {
+  MarkBit map_mark_bit = Marking::MarkBitFrom(map);
+  if (Marking::IsWhite(map_mark_bit)) {
+    WhiteToGreyAndPush(map, map_mark_bit);
+  }
+
+  IncrementalMarkingMarkingVisitor::IterateBody(map, obj);
+
+  MarkBit mark_bit = Marking::MarkBitFrom(obj);
+#ifdef DEBUG
+  MemoryChunk* chunk = MemoryChunk::FromAddress(obj->address());
+  SLOW_ASSERT(Marking::IsGrey(mark_bit) ||
+              (obj->IsFiller() && Marking::IsWhite(mark_bit)) ||
+              (chunk->IsFlagSet(MemoryChunk::HAS_PROGRESS_BAR) &&
+               Marking::IsBlack(mark_bit)));
+#endif
+  MarkBlackOrKeepBlack(obj, mark_bit, size);
+}
+
+
+void IncrementalMarking::ProcessMarkingDeque(intptr_t bytes_to_process) {
+  Map* filler_map = heap_->one_pointer_filler_map();
+  while (!marking_deque_.IsEmpty() && bytes_to_process > 0) {
+    HeapObject* obj = marking_deque_.Pop();
+
+    // Explicitly skip one word fillers. Incremental markbit patterns are
+    // correct only for objects that occupy at least two words.
+    Map* map = obj->map();
+    if (map == filler_map) continue;
+
+    int size = obj->SizeFromMap(map);
+    bytes_to_process -= size;
+    VisitObject(map, obj, size);
+  }
+}
+
+
+void IncrementalMarking::ProcessMarkingDeque() {
+  Map* filler_map = heap_->one_pointer_filler_map();
+  while (!marking_deque_.IsEmpty()) {
+    HeapObject* obj = marking_deque_.Pop();
+
+    // Explicitly skip one word fillers. Incremental markbit patterns are
+    // correct only for objects that occupy at least two words.
+    Map* map = obj->map();
+    if (map == filler_map) continue;
+
+    VisitObject(map, obj, obj->SizeFromMap(map));
+  }
+}
+
+
 void IncrementalMarking::Hurry() {
   if (state() == MARKING) {
     double start = 0.0;
@@ -628,49 +760,7 @@ void IncrementalMarking::Hurry() {
     }
     // TODO(gc) hurry can mark objects it encounters black as mutator
     // was stopped.
-    Map* filler_map = heap_->one_pointer_filler_map();
-    Map* native_context_map = heap_->native_context_map();
-    while (!marking_deque_.IsEmpty()) {
-      HeapObject* obj = marking_deque_.Pop();
-
-      // Explicitly skip one word fillers. Incremental markbit patterns are
-      // correct only for objects that occupy at least two words.
-      Map* map = obj->map();
-      if (map == filler_map) {
-        continue;
-      } else if (map == native_context_map) {
-        // Native contexts have weak fields.
-        IncrementalMarkingMarkingVisitor::VisitNativeContext(map, obj);
-      } else if (map->instance_type() == MAP_TYPE) {
-        Map* map = Map::cast(obj);
-        heap_->ClearCacheOnMap(map);
-
-        // When map collection is enabled we have to mark through map's
-        // transitions and back pointers in a special way to make these links
-        // weak.  Only maps for subclasses of JSReceiver can have transitions.
-        STATIC_ASSERT(LAST_TYPE == LAST_JS_RECEIVER_TYPE);
-        if (FLAG_collect_maps &&
-            map->instance_type() >= FIRST_JS_RECEIVER_TYPE) {
-          marker_.MarkMapContents(map);
-        } else {
-          IncrementalMarkingMarkingVisitor::VisitPointers(
-              heap_,
-              HeapObject::RawField(map, Map::kPointerFieldsBeginOffset),
-              HeapObject::RawField(map, Map::kPointerFieldsEndOffset));
-        }
-      } else {
-        MarkBit map_mark_bit = Marking::MarkBitFrom(map);
-        if (Marking::IsWhite(map_mark_bit)) {
-          WhiteToGreyAndPush(map, map_mark_bit);
-        }
-        IncrementalMarkingMarkingVisitor::IterateBody(map, obj);
-      }
-
-      MarkBit mark_bit = Marking::MarkBitFrom(obj);
-      ASSERT(!Marking::IsBlack(mark_bit));
-      Marking::MarkBlack(mark_bit);
-      MemoryChunk::IncrementLiveBytesFromGC(obj->address(), obj->Size());
-    }
+    ProcessMarkingDeque();
     state_ = COMPLETE;
     if (FLAG_trace_incremental_marking) {
       double end = OS::TimeCurrentMillis();
@@ -776,11 +866,25 @@ void IncrementalMarking::Step(intptr_t allocated_bytes,
 
   allocated_ += allocated_bytes;
 
-  if (allocated_ < kAllocatedThreshold) return;
+  if (allocated_ < kAllocatedThreshold &&
+      write_barriers_invoked_since_last_step_ <
+          kWriteBarriersInvokedThreshold) {
+    return;
+  }
 
   if (state_ == MARKING && no_marking_scope_depth_ > 0) return;
 
-  intptr_t bytes_to_process = allocated_ * allocation_marking_factor_;
+  // The marking speed is driven either by the allocation rate or by the rate
+  // at which we are having to check the color of objects in the write barrier.
+  // It is possible for a tight non-allocating loop to run a lot of write
+  // barriers before we get here and check them (marking can only take place on
+  // allocation), so to reduce the lumpiness we don't use the write barriers
+  // invoked since last step directly to determine the amount of work to do.
+  intptr_t bytes_to_process =
+      marking_speed_ * Max(allocated_, write_barriers_invoked_since_last_step_);
+  allocated_ = 0;
+  write_barriers_invoked_since_last_step_ = 0;
+
   bytes_scanned_ += bytes_to_process;
 
   double start = 0;
@@ -795,74 +899,19 @@ void IncrementalMarking::Step(intptr_t allocated_bytes,
       StartMarking(PREVENT_COMPACTION);
     }
   } else if (state_ == MARKING) {
-    Map* filler_map = heap_->one_pointer_filler_map();
-    Map* native_context_map = heap_->native_context_map();
-    while (!marking_deque_.IsEmpty() && bytes_to_process > 0) {
-      HeapObject* obj = marking_deque_.Pop();
-
-      // Explicitly skip one word fillers. Incremental markbit patterns are
-      // correct only for objects that occupy at least two words.
-      Map* map = obj->map();
-      if (map == filler_map) continue;
-
-      int size = obj->SizeFromMap(map);
-      bytes_to_process -= size;
-      MarkBit map_mark_bit = Marking::MarkBitFrom(map);
-      if (Marking::IsWhite(map_mark_bit)) {
-        WhiteToGreyAndPush(map, map_mark_bit);
-      }
-
-      // TODO(gc) switch to static visitor instead of normal visitor.
-      if (map == native_context_map) {
-        // Native contexts have weak fields.
-        Context* ctx = Context::cast(obj);
-
-        // We will mark cache black with a separate pass
-        // when we finish marking.
-        MarkObjectGreyDoNotEnqueue(ctx->normalized_map_cache());
-
-        IncrementalMarkingMarkingVisitor::VisitNativeContext(map, ctx);
-      } else if (map->instance_type() == MAP_TYPE) {
-        Map* map = Map::cast(obj);
-        heap_->ClearCacheOnMap(map);
-
-        // When map collection is enabled we have to mark through map's
-        // transitions and back pointers in a special way to make these links
-        // weak.  Only maps for subclasses of JSReceiver can have transitions.
-        STATIC_ASSERT(LAST_TYPE == LAST_JS_RECEIVER_TYPE);
-        if (FLAG_collect_maps &&
-            map->instance_type() >= FIRST_JS_RECEIVER_TYPE) {
-          marker_.MarkMapContents(map);
-        } else {
-          IncrementalMarkingMarkingVisitor::VisitPointers(
-              heap_,
-              HeapObject::RawField(map, Map::kPointerFieldsBeginOffset),
-              HeapObject::RawField(map, Map::kPointerFieldsEndOffset));
-        }
-      } else {
-        IncrementalMarkingMarkingVisitor::IterateBody(map, obj);
-      }
-
-      MarkBit obj_mark_bit = Marking::MarkBitFrom(obj);
-      SLOW_ASSERT(Marking::IsGrey(obj_mark_bit) ||
-                  (obj->IsFiller() && Marking::IsWhite(obj_mark_bit)));
-      Marking::MarkBlack(obj_mark_bit);
-      MemoryChunk::IncrementLiveBytesFromGC(obj->address(), size);
-    }
+    ProcessMarkingDeque(bytes_to_process);
     if (marking_deque_.IsEmpty()) MarkingComplete(action);
   }
 
-  allocated_ = 0;
-
   steps_count_++;
   steps_count_since_last_gc_++;
 
   bool speed_up = false;
 
-  if ((steps_count_ % kAllocationMarkingFactorSpeedupInterval) == 0) {
+  if ((steps_count_ % kMarkingSpeedAccellerationInterval) == 0) {
     if (FLAG_trace_gc) {
       PrintPID("Speed up marking after %d steps\n",
-               static_cast<int>(kAllocationMarkingFactorSpeedupInterval));
+               static_cast<int>(kMarkingSpeedAccellerationInterval));
     }
     speed_up = true;
   }
@@ -871,7 +920,7 @@ void IncrementalMarking::Step(intptr_t allocated_bytes,
       (old_generation_space_available_at_start_of_incremental_ < 10 * MB);
 
   bool only_1_nth_of_space_that_was_available_still_left =
-      (SpaceLeftInOldSpace() * (allocation_marking_factor_ + 1) <
+      (SpaceLeftInOldSpace() * (marking_speed_ + 1) <
           old_generation_space_available_at_start_of_incremental_);
 
   if (space_left_is_very_small ||
@@ -882,7 +931,7 @@ void IncrementalMarking::Step(intptr_t allocated_bytes,
 
   bool size_of_old_space_multiplied_by_n_during_marking =
       (heap_->PromotedTotalSize() >
-       (allocation_marking_factor_ + 1) *
+       (marking_speed_ + 1) *
            old_generation_space_used_at_start_of_incremental_);
   if (size_of_old_space_multiplied_by_n_during_marking) {
     speed_up = true;
@@ -893,7 +942,7 @@ void IncrementalMarking::Step(intptr_t allocated_bytes,
 
   int64_t promoted_during_marking = heap_->PromotedTotalSize()
       - old_generation_space_used_at_start_of_incremental_;
-  intptr_t delay = allocation_marking_factor_ * MB;
+  intptr_t delay = marking_speed_ * MB;
   intptr_t scavenge_slack = heap_->MaxSemiSpaceSize();
 
   // We try to scan at at least twice the speed that we are allocating.
@@ -910,12 +959,12 @@ void IncrementalMarking::Step(intptr_t allocated_bytes,
         PrintPID("Postponing speeding up marking until marking starts\n");
       }
     } else {
-      allocation_marking_factor_ += kAllocationMarkingFactorSpeedup;
-      allocation_marking_factor_ = static_cast<int>(
-          Min(kMaxAllocationMarkingFactor,
-              static_cast<intptr_t>(allocation_marking_factor_ * 1.3)));
+      marking_speed_ += kMarkingSpeedAccellerationInterval;
+      marking_speed_ = static_cast<int>(
+          Min(kMaxMarkingSpeed,
+              static_cast<intptr_t>(marking_speed_ * 1.3)));
       if (FLAG_trace_gc) {
-        PrintPID("Marking speed increased to %d\n", allocation_marking_factor_);
+        PrintPID("Marking speed increased to %d\n", marking_speed_);
       }
     }
   }
@@ -941,8 +990,9 @@ void IncrementalMarking::ResetStepCounters() {
   steps_count_since_last_gc_ = 0;
   steps_took_since_last_gc_ = 0;
   bytes_rescanned_ = 0;
-  allocation_marking_factor_ = kInitialAllocationMarkingFactor;
+  marking_speed_ = kInitialMarkingSpeed;
   bytes_scanned_ = 0;
+  write_barriers_invoked_since_last_step_ = 0;
 }
 
 
diff --git a/deps/v8/src/incremental-marking.h b/deps/v8/src/incremental-marking.h
index 4cb356de8f..fc5a978cc4 100644
--- a/deps/v8/src/incremental-marking.h
+++ b/deps/v8/src/incremental-marking.h
@@ -95,21 +95,23 @@ class IncrementalMarking {
   // progress in the face of the mutator creating new work for it.  We start
   // of at a moderate rate of work and gradually increase the speed of the
   // incremental marker until it completes.
-  // Do some marking every time this much memory has been allocated.
+  // Do some marking every time this much memory has been allocated or that many
+  // heavy (color-checking) write barriers have been invoked.
   static const intptr_t kAllocatedThreshold = 65536;
+  static const intptr_t kWriteBarriersInvokedThreshold = 65536;
   // Start off by marking this many times more memory than has been allocated.
-  static const intptr_t kInitialAllocationMarkingFactor = 1;
+  static const intptr_t kInitialMarkingSpeed = 1;
   // But if we are promoting a lot of data we need to mark faster to keep up
   // with the data that is entering the old space through promotion.
   static const intptr_t kFastMarking = 3;
   // After this many steps we increase the marking/allocating factor.
-  static const intptr_t kAllocationMarkingFactorSpeedupInterval = 1024;
+  static const intptr_t kMarkingSpeedAccellerationInterval = 1024;
   // This is how much we increase the marking/allocating factor by.
-  static const intptr_t kAllocationMarkingFactorSpeedup = 2;
-  static const intptr_t kMaxAllocationMarkingFactor = 1000;
+  static const intptr_t kMarkingSpeedAccelleration = 2;
+  static const intptr_t kMaxMarkingSpeed = 1000;
 
   void OldSpaceStep(intptr_t allocated) {
-    Step(allocated * kFastMarking / kInitialAllocationMarkingFactor,
+    Step(allocated * kFastMarking / kInitialMarkingSpeed,
          GC_VIA_STACK_GUARD);
   }
 
@@ -125,13 +127,19 @@ class IncrementalMarking {
   }
 
   static void RecordWriteFromCode(HeapObject* obj,
-                                  Object* value,
+                                  Object** slot,
                                   Isolate* isolate);
 
   static void RecordWriteForEvacuationFromCode(HeapObject* obj,
                                                Object** slot,
                                                Isolate* isolate);
 
+  // Record a slot for compaction.  Returns false for objects that are
+  // guaranteed to be rescanned or not guaranteed to survive.
+  //
+  // No slots in white objects should be recorded, as some slots are typed and
+  // cannot be interpreted correctly if the underlying object does not survive
+  // the incremental cycle (stays white).
   INLINE(bool BaseRecordWrite(HeapObject* obj, Object** slot, Object* value));
   INLINE(void RecordWrite(HeapObject* obj, Object** slot, Object* value));
   INLINE(void RecordWriteIntoCode(HeapObject* obj,
@@ -156,29 +164,6 @@ class IncrementalMarking {
 
   inline void WhiteToGreyAndPush(HeapObject* obj, MarkBit mark_bit);
 
-  // Does white->black or keeps gray or black color. Returns true if converting
-  // white to black.
-  inline bool MarkBlackOrKeepGrey(MarkBit mark_bit) {
-    ASSERT(!Marking::IsImpossible(mark_bit));
-    if (mark_bit.Get()) {
-      // Grey or black: Keep the color.
-      return false;
-    }
-    mark_bit.Set();
-    ASSERT(Marking::IsBlack(mark_bit));
-    return true;
-  }
-
-  // Marks the object grey and pushes it on the marking stack.
-  // Returns true if object needed marking and false otherwise.
-  // This is for incremental marking only.
-  INLINE(bool MarkObjectAndPush(HeapObject* obj));
-
-  // Marks the object black without pushing it on the marking stack.
-  // Returns true if object needed marking and false otherwise.
-  // This is for incremental marking only.
-  INLINE(bool MarkObjectWithoutPush(HeapObject* obj));
-
   inline int steps_count() {
     return steps_count_;
   }
@@ -215,13 +200,13 @@ class IncrementalMarking {
 
   void NotifyOfHighPromotionRate() {
     if (IsMarking()) {
-      if (allocation_marking_factor_ < kFastMarking) {
+      if (marking_speed_ < kFastMarking) {
         if (FLAG_trace_gc) {
           PrintPID("Increasing marking speed to %d "
                    "due to high promotion rate\n",
                    static_cast<int>(kFastMarking));
         }
-        allocation_marking_factor_ = kFastMarking;
+        marking_speed_ = kFastMarking;
       }
     }
   }
@@ -261,6 +246,12 @@ class IncrementalMarking {
 
   void EnsureMarkingDequeIsCommitted();
 
+  INLINE(void ProcessMarkingDeque());
+
+  INLINE(void ProcessMarkingDeque(intptr_t bytes_to_process));
+
+  INLINE(void VisitObject(Map* map, HeapObject* obj, int size));
+
   Heap* heap_;
 
   State state_;
@@ -269,7 +260,6 @@ class IncrementalMarking {
   VirtualMemory* marking_deque_memory_;
   bool marking_deque_memory_committed_;
   MarkingDeque marking_deque_;
-  Marker<IncrementalMarking> marker_;
 
   int steps_count_;
   double steps_took_;
@@ -280,9 +270,10 @@ class IncrementalMarking {
   double steps_took_since_last_gc_;
   int64_t bytes_rescanned_;
   bool should_hurry_;
-  int allocation_marking_factor_;
+  int marking_speed_;
   intptr_t bytes_scanned_;
   intptr_t allocated_;
+  intptr_t write_barriers_invoked_since_last_step_;
 
   int no_marking_scope_depth_;
 
diff --git a/deps/v8/src/interface.cc b/deps/v8/src/interface.cc
index 336be82c60..1634a37113 100644
--- a/deps/v8/src/interface.cc
+++ b/deps/v8/src/interface.cc
@@ -170,6 +170,8 @@ void Interface::DoUnify(Interface* that, bool* ok, Zone* zone) {
   ASSERT(that->forward_ == NULL);
   ASSERT(!this->IsValue());
   ASSERT(!that->IsValue());
+  ASSERT(this->index_ == -1);
+  ASSERT(that->index_ == -1);
   ASSERT(*ok);
 
 #ifdef DEBUG
@@ -194,15 +196,6 @@ void Interface::DoUnify(Interface* that, bool* ok, Zone* zone) {
     return;
   }
 
-  // Merge instance.
-  if (!that->instance_.is_null()) {
-    if (!this->instance_.is_null() && *this->instance_ != *that->instance_) {
-      *ok = false;
-      return;
-    }
-    this->instance_ = that->instance_;
-  }
-
   // Merge interfaces.
   this->flags_ |= that->flags_;
   that->forward_ = this;
@@ -227,7 +220,7 @@ void Interface::Print(int n) {
   } else if (IsValue()) {
     PrintF("value\n");
   } else if (IsModule()) {
-    PrintF("module %s{", IsFrozen() ? "" : "(unresolved) ");
+    PrintF("module %d %s{", Index(), IsFrozen() ? "" : "(unresolved) ");
     ZoneHashMap* map = Chase()->exports_;
     if (map == NULL || map->occupancy() == 0) {
       PrintF("}\n");
diff --git a/deps/v8/src/interface.h b/deps/v8/src/interface.h
index 94ef11ba5c..f824a9a874 100644
--- a/deps/v8/src/interface.h
+++ b/deps/v8/src/interface.h
@@ -108,18 +108,18 @@ class Interface : public ZoneObject {
     if (*ok) Chase()->flags_ |= MODULE;
   }
 
-  // Set associated instance object.
-  void MakeSingleton(Handle<JSModule> instance, bool* ok) {
-    *ok = IsModule() && Chase()->instance_.is_null();
-    if (*ok) Chase()->instance_ = instance;
-  }
-
   // Do not allow any further refinements, directly or through unification.
   void Freeze(bool* ok) {
     *ok = IsValue() || IsModule();
     if (*ok) Chase()->flags_ |= FROZEN;
   }
 
+  // Assign an index.
+  void Allocate(int index) {
+    ASSERT(IsModule() && IsFrozen() && Chase()->index_ == -1);
+    Chase()->index_ = index;
+  }
+
   // ---------------------------------------------------------------------------
   // Accessors.
 
@@ -138,7 +138,23 @@ class Interface : public ZoneObject {
   // Check whether this is closed (i.e. fully determined).
   bool IsFrozen() { return Chase()->flags_ & FROZEN; }
 
-  Handle<JSModule> Instance() { return Chase()->instance_; }
+  bool IsUnified(Interface* that) {
+    return Chase() == that->Chase()
+        || (this->IsValue() == that->IsValue() &&
+            this->IsConst() == that->IsConst());
+  }
+
+  int Length() {
+    ASSERT(IsModule() && IsFrozen());
+    ZoneHashMap* exports = Chase()->exports_;
+    return exports ? exports->occupancy() : 0;
+  }
+
+  // The context slot in the hosting global context pointing to this module.
+  int Index() {
+    ASSERT(IsModule() && IsFrozen());
+    return Chase()->index_;
+  }
 
   // Look up an exported name. Returns NULL if not (yet) defined.
   Interface* Lookup(Handle<String> name, Zone* zone);
@@ -194,12 +210,13 @@ class Interface : public ZoneObject {
   int flags_;
   Interface* forward_;     // Unification link
   ZoneHashMap* exports_;   // Module exports and their types (allocated lazily)
-  Handle<JSModule> instance_;
+  int index_;
 
   explicit Interface(int flags)
     : flags_(flags),
       forward_(NULL),
-      exports_(NULL) {
+      exports_(NULL),
+      index_(-1) {
 #ifdef DEBUG
     if (FLAG_print_interface_details)
       PrintF("# Creating %p\n", static_cast<void*>(this));
diff --git a/deps/v8/src/isolate.cc b/deps/v8/src/isolate.cc
index 75e15a4541..15d0bdd441 100644
--- a/deps/v8/src/isolate.cc
+++ b/deps/v8/src/isolate.cc
@@ -426,11 +426,6 @@ char* Isolate::Iterate(ObjectVisitor* v, char* thread_storage) {
 }
 
 
-void Isolate::IterateThread(ThreadVisitor* v) {
-  v->VisitThread(this, thread_local_top());
-}
-
-
 void Isolate::IterateThread(ThreadVisitor* v, char* t) {
   ThreadLocalTop* thread = reinterpret_cast<ThreadLocalTop*>(t);
   v->VisitThread(this, thread);
@@ -553,7 +548,97 @@ void Isolate::PushStackTraceAndDie(unsigned int magic,
 }
 
 
-void Isolate::CaptureAndSetCurrentStackTraceFor(Handle<JSObject> error_object) {
+// Determines whether the given stack frame should be displayed in
+// a stack trace.  The caller is the error constructor that asked
+// for the stack trace to be collected.  The first time a construct
+// call to this function is encountered it is skipped.  The seen_caller
+// in/out parameter is used to remember if the caller has been seen
+// yet.
+static bool IsVisibleInStackTrace(StackFrame* raw_frame,
+                                  Object* caller,
+                                  bool* seen_caller) {
+  // Only display JS frames.
+  if (!raw_frame->is_java_script()) return false;
+  JavaScriptFrame* frame = JavaScriptFrame::cast(raw_frame);
+  Object* raw_fun = frame->function();
+  // Not sure when this can happen but skip it just in case.
+  if (!raw_fun->IsJSFunction()) return false;
+  if ((raw_fun == caller) && !(*seen_caller)) {
+    *seen_caller = true;
+    return false;
+  }
+  // Skip all frames until we've seen the caller.
+  if (!(*seen_caller)) return false;
+  // Also, skip non-visible built-in functions and any call with the builtins
+  // object as receiver, so as to not reveal either the builtins object or
+  // an internal function.
+  // The --builtins-in-stack-traces command line flag allows including
+  // internal call sites in the stack trace for debugging purposes.
+  if (!FLAG_builtins_in_stack_traces) {
+    JSFunction* fun = JSFunction::cast(raw_fun);
+    if (frame->receiver()->IsJSBuiltinsObject() ||
+        (fun->IsBuiltin() && !fun->shared()->native())) {
+      return false;
+    }
+  }
+  return true;
+}
+
+
+Handle<JSArray> Isolate::CaptureSimpleStackTrace(Handle<JSObject> error_object,
+                                                 Handle<Object> caller,
+                                                 int limit) {
+  limit = Max(limit, 0);  // Ensure that limit is not negative.
+  int initial_size = Min(limit, 10);
+  Handle<FixedArray> elements =
+      factory()->NewFixedArrayWithHoles(initial_size * 4);
+
+  // If the caller parameter is a function we skip frames until we're
+  // under it before starting to collect.
+  bool seen_caller = !caller->IsJSFunction();
+  int cursor = 0;
+  int frames_seen = 0;
+  for (StackFrameIterator iter(this);
+       !iter.done() && frames_seen < limit;
+       iter.Advance()) {
+    StackFrame* raw_frame = iter.frame();
+    if (IsVisibleInStackTrace(raw_frame, *caller, &seen_caller)) {
+      frames_seen++;
+      JavaScriptFrame* frame = JavaScriptFrame::cast(raw_frame);
+      // Set initial size to the maximum inlining level + 1 for the outermost
+      // function.
+      List<FrameSummary> frames(Compiler::kMaxInliningLevels + 1);
+      frame->Summarize(&frames);
+      for (int i = frames.length() - 1; i >= 0; i--) {
+        if (cursor + 4 > elements->length()) {
+          int new_capacity = JSObject::NewElementsCapacity(elements->length());
+          Handle<FixedArray> new_elements =
+              factory()->NewFixedArrayWithHoles(new_capacity);
+          for (int i = 0; i < cursor; i++) {
+            new_elements->set(i, elements->get(i));
+          }
+          elements = new_elements;
+        }
+        ASSERT(cursor + 4 <= elements->length());
+
+        Handle<Object> recv = frames[i].receiver();
+        Handle<JSFunction> fun = frames[i].function();
+        Handle<Code> code = frames[i].code();
+        Handle<Smi> offset(Smi::FromInt(frames[i].offset()));
+        elements->set(cursor++, *recv);
+        elements->set(cursor++, *fun);
+        elements->set(cursor++, *code);
+        elements->set(cursor++, *offset);
+      }
+    }
+  }
+  Handle<JSArray> result = factory()->NewJSArrayWithElements(elements);
+  result->set_length(Smi::FromInt(cursor));
+  return result;
+}
+
+
+void Isolate::CaptureAndSetDetailedStackTrace(Handle<JSObject> error_object) {
   if (capture_stack_trace_for_uncaught_exceptions_) {
     // Capture stack trace for a detailed exception message.
     Handle<String> key = factory()->hidden_stack_trace_symbol();
@@ -574,8 +659,6 @@ Handle<JSArray> Isolate::CaptureCurrentStackTrace(
   Handle<String> column_key = factory()->LookupAsciiSymbol("column");
   Handle<String> line_key = factory()->LookupAsciiSymbol("lineNumber");
   Handle<String> script_key = factory()->LookupAsciiSymbol("scriptName");
-  Handle<String> name_or_source_url_key =
-      factory()->LookupAsciiSymbol("nameOrSourceURL");
   Handle<String> script_name_or_source_url_key =
       factory()->LookupAsciiSymbol("scriptNameOrSourceURL");
   Handle<String> function_key = factory()->LookupAsciiSymbol("functionName");
@@ -635,18 +718,7 @@ Handle<JSArray> Isolate::CaptureCurrentStackTrace(
       }
 
       if (options & StackTrace::kScriptNameOrSourceURL) {
-        Handle<Object> script_name(script->name(), this);
-        Handle<JSValue> script_wrapper = GetScriptWrapper(script);
-        Handle<Object> property = GetProperty(script_wrapper,
-                                              name_or_source_url_key);
-        ASSERT(property->IsJSFunction());
-        Handle<JSFunction> method = Handle<JSFunction>::cast(property);
-        bool caught_exception;
-        Handle<Object> result = Execution::TryCall(method, script_wrapper, 0,
-                                                   NULL, &caught_exception);
-        if (caught_exception) {
-          result = factory()->undefined_value();
-        }
+        Handle<Object> result = GetScriptNameOrSourceURL(script);
         CHECK_NOT_EMPTY_HANDLE(this,
                                JSObject::SetLocalPropertyIgnoreAttributes(
                                    stack_frame, script_name_or_source_url_key,
@@ -923,15 +995,28 @@ const char* const Isolate::kStackOverflowMessage =
 
 Failure* Isolate::StackOverflow() {
   HandleScope scope;
+  // At this point we cannot create an Error object using its javascript
+  // constructor.  Instead, we copy the pre-constructed boilerplate and
+  // attach the stack trace as a hidden property.
   Handle<String> key = factory()->stack_overflow_symbol();
   Handle<JSObject> boilerplate =
       Handle<JSObject>::cast(GetProperty(js_builtins_object(), key));
-  Handle<Object> exception = Copy(boilerplate);
-  // TODO(1240995): To avoid having to call JavaScript code to compute
-  // the message for stack overflow exceptions which is very likely to
-  // double fault with another stack overflow exception, we use a
-  // precomputed message.
+  Handle<JSObject> exception = Copy(boilerplate);
   DoThrow(*exception, NULL);
+
+  // Get stack trace limit.
+  Handle<Object> error = GetProperty(js_builtins_object(), "$Error");
+  if (!error->IsJSObject()) return Failure::Exception();
+  Handle<Object> stack_trace_limit =
+      GetProperty(Handle<JSObject>::cast(error), "stackTraceLimit");
+  if (!stack_trace_limit->IsNumber()) return Failure::Exception();
+  int limit = static_cast<int>(stack_trace_limit->Number());
+
+  Handle<JSArray> stack_trace = CaptureSimpleStackTrace(
+      exception, factory()->undefined_value(), limit);
+  JSObject::SetHiddenProperty(exception,
+                              factory()->hidden_stack_trace_symbol(),
+                              stack_trace);
   return Failure::Exception();
 }
 
@@ -972,9 +1057,12 @@ void Isolate::ScheduleThrow(Object* exception) {
   // When scheduling a throw we first throw the exception to get the
   // error reporting if it is uncaught before rescheduling it.
   Throw(exception);
-  thread_local_top()->scheduled_exception_ = pending_exception();
-  thread_local_top()->external_caught_exception_ = false;
-  clear_pending_exception();
+  PropagatePendingExceptionToExternalTryCatch();
+  if (has_pending_exception()) {
+    thread_local_top()->scheduled_exception_ = pending_exception();
+    thread_local_top()->external_caught_exception_ = false;
+    clear_pending_exception();
+  }
 }
 
 
@@ -1138,10 +1226,22 @@ void Isolate::DoThrow(Object* exception, MessageLocation* location) {
               stack_trace_for_uncaught_exceptions_options_);
         }
       }
+
+      Handle<Object> exception_arg = exception_handle;
+      // If the exception argument is a custom object, turn it into a string
+      // before throwing as uncaught exception.  Note that the pending
+      // exception object to be set later must not be turned into a string.
+      if (exception_arg->IsJSObject() && !IsErrorObject(exception_arg)) {
+        bool failed = false;
+        exception_arg = Execution::ToDetailString(exception_arg, &failed);
+        if (failed) {
+          exception_arg = factory()->LookupAsciiSymbol("exception");
+        }
+      }
       Handle<Object> message_obj = MessageHandler::MakeMessageObject(
           "uncaught_exception",
           location,
-          HandleVector<Object>(&exception_handle, 1),
+          HandleVector<Object>(&exception_arg, 1),
           stack_trace,
           stack_trace_object);
       thread_local_top()->pending_message_obj_ = *message_obj;
@@ -1264,6 +1364,24 @@ void Isolate::ReportPendingMessages() {
 }
 
 
+MessageLocation Isolate::GetMessageLocation() {
+  ASSERT(has_pending_exception());
+
+  if (thread_local_top_.pending_exception_ != Failure::OutOfMemoryException() &&
+      thread_local_top_.pending_exception_ != heap()->termination_exception() &&
+      thread_local_top_.has_pending_message_ &&
+      !thread_local_top_.pending_message_obj_->IsTheHole() &&
+      thread_local_top_.pending_message_script_ != NULL) {
+    Handle<Script> script(thread_local_top_.pending_message_script_);
+    int start_pos = thread_local_top_.pending_message_start_pos_;
+    int end_pos = thread_local_top_.pending_message_end_pos_;
+    return MessageLocation(script, start_pos, end_pos);
+  }
+
+  return MessageLocation();
+}
+
+
 void Isolate::TraceException(bool flag) {
   FLAG_trace_exception = flag;  // TODO(isolates): This is an unfortunate use.
 }
@@ -1926,7 +2044,7 @@ bool Isolate::Init(Deserializer* des) {
 
   // If we are deserializing, log non-function code objects and compiled
   // functions found in the snapshot.
-  if (create_heap_objects &&
+  if (!create_heap_objects &&
       (FLAG_log_code || FLAG_ll_prof || logger_->is_logging_code_events())) {
     HandleScope scope;
     LOG(this, LogCodeObjects());
diff --git a/deps/v8/src/isolate.h b/deps/v8/src/isolate.h
index 1d7bc6fc6d..ac2e554f85 100644
--- a/deps/v8/src/isolate.h
+++ b/deps/v8/src/isolate.h
@@ -354,6 +354,7 @@ typedef List<HeapObject*, PreallocatedStorageAllocationPolicy> DebugObjectCache;
   V(uint64_t, enabled_cpu_features, 0)                                         \
   V(CpuProfiler*, cpu_profiler, NULL)                                          \
   V(HeapProfiler*, heap_profiler, NULL)                                        \
+  V(bool, observer_delivery_pending, false)                                    \
   ISOLATE_DEBUGGER_INIT_LIST(V)
 
 class Isolate {
@@ -715,7 +716,10 @@ class Isolate {
       int frame_limit,
       StackTrace::StackTraceOptions options);
 
-  void CaptureAndSetCurrentStackTraceFor(Handle<JSObject> error_object);
+  Handle<JSArray> CaptureSimpleStackTrace(Handle<JSObject> error_object,
+                                          Handle<Object> caller,
+                                          int limit);
+  void CaptureAndSetDetailedStackTrace(Handle<JSObject> error_object);
 
   // Returns if the top context may access the given global object. If
   // the result is false, the pending exception is guaranteed to be
@@ -739,6 +743,8 @@ class Isolate {
   Failure* ReThrow(MaybeObject* exception);
   void ScheduleThrow(Object* exception);
   void ReportPendingMessages();
+  // Return pending location if any or unfilled structure.
+  MessageLocation GetMessageLocation();
   Failure* ThrowIllegalOperation();
 
   // Promote a scheduled exception to pending. Asserts has_scheduled_exception.
@@ -764,7 +770,6 @@ class Isolate {
   void Iterate(ObjectVisitor* v);
   void Iterate(ObjectVisitor* v, ThreadLocalTop* t);
   char* Iterate(ObjectVisitor* v, char* t);
-  void IterateThread(ThreadVisitor* v);
   void IterateThread(ThreadVisitor* v, char* t);
 
 
@@ -917,10 +922,6 @@ class Isolate {
 
   bool fp_stubs_generated() { return fp_stubs_generated_; }
 
-  StaticResource<SafeStringInputBuffer>* compiler_safe_string_input_buffer() {
-    return &compiler_safe_string_input_buffer_;
-  }
-
   Builtins* builtins() { return &builtins_; }
 
   void NotifyExtensionInstalled() {
@@ -991,9 +992,6 @@ class Isolate {
 
   Factory* factory() { return reinterpret_cast<Factory*>(this); }
 
-  // SerializerDeserializer state.
-  static const int kPartialSnapshotCacheCapacity = 1400;
-
   static const int kJSRegexpStaticOffsetsVectorSize = 128;
 
   Address external_callback() {
@@ -1230,7 +1228,6 @@ class Isolate {
   ThreadManager* thread_manager_;
   RuntimeState runtime_state_;
   bool fp_stubs_generated_;
-  StaticResource<SafeStringInputBuffer> compiler_safe_string_input_buffer_;
   Builtins builtins_;
   bool has_installed_extensions_;
   StringTracker* string_tracker_;
@@ -1397,12 +1394,7 @@ class StackLimitCheck BASE_EMBEDDED {
 
   bool HasOverflowed() const {
     StackGuard* stack_guard = isolate_->stack_guard();
-    // Stack has overflowed in C++ code only if stack pointer exceeds the C++
-    // stack guard and the limits are not set to interrupt values.
-    // TODO(214): Stack overflows are ignored if a interrupt is pending. This
-    // code should probably always use the initial C++ limit.
-    return (reinterpret_cast<uintptr_t>(this) < stack_guard->climit()) &&
-           stack_guard->IsStackOverflow();
+    return (reinterpret_cast<uintptr_t>(this) < stack_guard->real_climit());
   }
  private:
   Isolate* isolate_;
diff --git a/deps/v8/src/json-parser.h b/deps/v8/src/json-parser.h
index a4db130e25..2f980cc05b 100644
--- a/deps/v8/src/json-parser.h
+++ b/deps/v8/src/json-parser.h
@@ -58,7 +58,7 @@ class JsonParser BASE_EMBEDDED {
     if (position_ >= source_length_) {
       c0_ = kEndOfString;
     } else if (seq_ascii) {
-      c0_ = seq_source_->SeqAsciiStringGet(position_);
+      c0_ = seq_source_->SeqOneByteStringGet(position_);
     } else {
       c0_ = source_->Get(position_);
     }
@@ -71,11 +71,11 @@ class JsonParser BASE_EMBEDDED {
   inline void AdvanceSkipWhitespace() {
     do {
       Advance();
-    } while (c0_ == '\t' || c0_ == '\r' || c0_ == '\n' || c0_ == ' ');
+    } while (c0_ == ' ' || c0_ == '\t' || c0_ == '\n' || c0_ == '\r');
   }
 
   inline void SkipWhitespace() {
-    while (c0_ == '\t' || c0_ == '\r' || c0_ == '\n' || c0_ == ' ') {
+    while (c0_ == ' ' || c0_ == '\t' || c0_ == '\n' || c0_ == '\r') {
       Advance();
     }
   }
@@ -149,17 +149,23 @@ class JsonParser BASE_EMBEDDED {
   }
 
   inline Isolate* isolate() { return isolate_; }
+  inline Factory* factory() { return factory_; }
+  inline Handle<JSFunction> object_constructor() { return object_constructor_; }
   inline Zone* zone() const { return zone_; }
 
   static const int kInitialSpecialStringLength = 1024;
+  static const int kPretenureTreshold = 100 * 1024;
 
 
  private:
   Handle<String> source_;
   int source_length_;
-  Handle<SeqAsciiString> seq_source_;
+  Handle<SeqOneByteString> seq_source_;
 
+  PretenureFlag pretenure_;
   Isolate* isolate_;
+  Factory* factory_;
+  Handle<JSFunction> object_constructor_;
   uc32 c0_;
   int position_;
   Zone* zone_;
@@ -169,14 +175,18 @@ template <bool seq_ascii>
 Handle<Object> JsonParser<seq_ascii>::ParseJson(Handle<String> source,
                                                 Zone* zone) {
   isolate_ = source->map()->GetHeap()->isolate();
+  factory_ = isolate_->factory();
+  object_constructor_ = Handle<JSFunction>(
+      isolate()->native_context()->object_function(), isolate());
   zone_ = zone;
   FlattenString(source);
   source_ = source;
   source_length_ = source_->length();
+  pretenure_ = (source_length_ >= kPretenureTreshold) ? TENURED : NOT_TENURED;
 
   // Optimized fast case where we only have ASCII characters.
   if (seq_ascii) {
-    seq_source_ = Handle<SeqAsciiString>::cast(source_);
+    seq_source_ = Handle<SeqOneByteString>::cast(source_);
   }
 
   // Set initial position right before the string.
@@ -185,10 +195,12 @@ Handle<Object> JsonParser<seq_ascii>::ParseJson(Handle<String> source,
   AdvanceSkipWhitespace();
   Handle<Object> result = ParseJsonValue();
   if (result.is_null() || c0_ != kEndOfString) {
-    // Parse failed. Current character is the unexpected token.
+    // Some exception (for example stack overflow) is already pending.
+    if (isolate_->has_pending_exception()) return Handle<Object>::null();
 
+    // Parse failed. Current character is the unexpected token.
     const char* message;
-    Factory* factory = isolate()->factory();
+    Factory* factory = this->factory();
     Handle<JSArray> array;
 
     switch (c0_) {
@@ -237,87 +249,118 @@ Handle<Object> JsonParser<seq_ascii>::ParseJson(Handle<String> source,
 // Parse any JSON value.
 template <bool seq_ascii>
 Handle<Object> JsonParser<seq_ascii>::ParseJsonValue() {
-  switch (c0_) {
-    case '"':
-      return ParseJsonString();
-    case '-':
-    case '0':
-    case '1':
-    case '2':
-    case '3':
-    case '4':
-    case '5':
-    case '6':
-    case '7':
-    case '8':
-    case '9':
-      return ParseJsonNumber();
-    case 'f':
-      if (AdvanceGetChar() == 'a' && AdvanceGetChar() == 'l' &&
-          AdvanceGetChar() == 's' && AdvanceGetChar() == 'e') {
-        AdvanceSkipWhitespace();
-        return isolate()->factory()->false_value();
-      } else {
-        return ReportUnexpectedCharacter();
-      }
-    case 't':
-      if (AdvanceGetChar() == 'r' && AdvanceGetChar() == 'u' &&
-          AdvanceGetChar() == 'e') {
-        AdvanceSkipWhitespace();
-        return isolate()->factory()->true_value();
-      } else {
-        return ReportUnexpectedCharacter();
-      }
-    case 'n':
-      if (AdvanceGetChar() == 'u' && AdvanceGetChar() == 'l' &&
-          AdvanceGetChar() == 'l') {
-        AdvanceSkipWhitespace();
-        return isolate()->factory()->null_value();
-      } else {
-        return ReportUnexpectedCharacter();
-      }
-    case '{':
-      return ParseJsonObject();
-    case '[':
-      return ParseJsonArray();
-    default:
-      return ReportUnexpectedCharacter();
+  StackLimitCheck stack_check(isolate_);
+  if (stack_check.HasOverflowed()) {
+    isolate_->StackOverflow();
+    return Handle<Object>::null();
+  }
+
+  if (c0_ == '"') return ParseJsonString();
+  if ((c0_ >= '0' && c0_ <= '9') || c0_ == '-') return ParseJsonNumber();
+  if (c0_ == '{') return ParseJsonObject();
+  if (c0_ == '[') return ParseJsonArray();
+  if (c0_ == 'f') {
+    if (AdvanceGetChar() == 'a' && AdvanceGetChar() == 'l' &&
+        AdvanceGetChar() == 's' && AdvanceGetChar() == 'e') {
+      AdvanceSkipWhitespace();
+      return factory()->false_value();
+    }
+    return ReportUnexpectedCharacter();
+  }
+  if (c0_ == 't') {
+    if (AdvanceGetChar() == 'r' && AdvanceGetChar() == 'u' &&
+        AdvanceGetChar() == 'e') {
+      AdvanceSkipWhitespace();
+      return factory()->true_value();
+    }
+    return ReportUnexpectedCharacter();
+  }
+  if (c0_ == 'n') {
+    if (AdvanceGetChar() == 'u' && AdvanceGetChar() == 'l' &&
+        AdvanceGetChar() == 'l') {
+      AdvanceSkipWhitespace();
+      return factory()->null_value();
+    }
+    return ReportUnexpectedCharacter();
   }
+  return ReportUnexpectedCharacter();
 }
 
 
 // Parse a JSON object. Position must be right at '{'.
 template <bool seq_ascii>
 Handle<Object> JsonParser<seq_ascii>::ParseJsonObject() {
-  Handle<JSFunction> object_constructor(
-      isolate()->native_context()->object_function());
+  Handle<Object> prototype;
   Handle<JSObject> json_object =
-      isolate()->factory()->NewJSObject(object_constructor);
+      factory()->NewJSObject(object_constructor(), pretenure_);
   ASSERT_EQ(c0_, '{');
 
   AdvanceSkipWhitespace();
   if (c0_ != '}') {
     do {
       if (c0_ != '"') return ReportUnexpectedCharacter();
+
+      int start_position = position_;
+      Advance();
+
+      uint32_t index = 0;
+      if (c0_ >= '0' && c0_ <= '9') {
+        // Maybe an array index, try to parse it.
+        if (c0_ == '0') {
+          // With a leading zero, the string has to be "0" only to be an index.
+          Advance();
+        } else {
+          do {
+            int d = c0_ - '0';
+            if (index > 429496729U - ((d > 5) ? 1 : 0)) break;
+            index = (index * 10) + d;
+            Advance();
+          } while (c0_ >= '0' && c0_ <= '9');
+        }
+
+        if (c0_ == '"') {
+          // Successfully parsed index, parse and store element.
+          AdvanceSkipWhitespace();
+
+          if (c0_ != ':') return ReportUnexpectedCharacter();
+          AdvanceSkipWhitespace();
+          Handle<Object> value = ParseJsonValue();
+          if (value.is_null()) return ReportUnexpectedCharacter();
+
+          JSObject::SetOwnElement(json_object, index, value, kNonStrictMode);
+          continue;
+        }
+        // Not an index, fallback to the slow path.
+      }
+
+      position_ = start_position;
+#ifdef DEBUG
+      c0_ = '"';
+#endif
+
       Handle<String> key = ParseJsonSymbol();
       if (key.is_null() || c0_ != ':') return ReportUnexpectedCharacter();
+
       AdvanceSkipWhitespace();
       Handle<Object> value = ParseJsonValue();
       if (value.is_null()) return ReportUnexpectedCharacter();
 
-      uint32_t index;
-      if (key->AsArrayIndex(&index)) {
-        JSObject::SetOwnElement(json_object, index, value, kNonStrictMode);
-      } else if (key->Equals(isolate()->heap()->Proto_symbol())) {
-        SetPrototype(json_object, value);
+      if (key->Equals(isolate()->heap()->Proto_symbol())) {
+        prototype = value;
       } else {
-        JSObject::SetLocalPropertyIgnoreAttributes(
-            json_object, key, value, NONE);
+        if (JSObject::TryTransitionToField(json_object, key)) {
+          int index = json_object->LastAddedFieldIndex();
+          json_object->FastPropertyAtPut(index, *value);
+        } else {
+          JSObject::SetLocalPropertyIgnoreAttributes(
+              json_object, key, value, NONE);
+        }
       }
     } while (MatchSkipWhiteSpace(','));
     if (c0_ != '}') {
       return ReportUnexpectedCharacter();
     }
+    if (!prototype.is_null()) SetPrototype(json_object, prototype);
   }
   AdvanceSkipWhitespace();
   return json_object;
@@ -344,11 +387,12 @@ Handle<Object> JsonParser<seq_ascii>::ParseJsonArray() {
   AdvanceSkipWhitespace();
   // Allocate a fixed array with all the elements.
   Handle<FixedArray> fast_elements =
-      isolate()->factory()->NewFixedArray(elements.length());
+      factory()->NewFixedArray(elements.length(), pretenure_);
   for (int i = 0, n = elements.length(); i < n; i++) {
     fast_elements->set(i, *elements[i]);
   }
-  return isolate()->factory()->NewJSArrayWithElements(fast_elements);
+  return factory()->NewJSArrayWithElements(
+      fast_elements, FAST_ELEMENTS, pretenure_);
 }
 
 
@@ -415,7 +459,7 @@ Handle<Object> JsonParser<seq_ascii>::ParseJsonNumber() {
     buffer.Dispose();
   }
   SkipWhitespace();
-  return isolate()->factory()->NewNumber(number);
+  return factory()->NewNumber(number, pretenure_);
 }
 
 
@@ -428,21 +472,27 @@ inline void SeqStringSet(Handle<SeqTwoByteString> seq_str, int i, uc32 c) {
 }
 
 template <>
-inline void SeqStringSet(Handle<SeqAsciiString> seq_str, int i, uc32 c) {
-  seq_str->SeqAsciiStringSet(i, c);
+inline void SeqStringSet(Handle<SeqOneByteString> seq_str, int i, uc32 c) {
+  seq_str->SeqOneByteStringSet(i, c);
 }
 
 template <typename StringType>
-inline Handle<StringType> NewRawString(Factory* factory, int length);
+inline Handle<StringType> NewRawString(Factory* factory,
+                                       int length,
+                                       PretenureFlag pretenure);
 
 template <>
-inline Handle<SeqTwoByteString> NewRawString(Factory* factory, int length) {
-  return factory->NewRawTwoByteString(length, NOT_TENURED);
+inline Handle<SeqTwoByteString> NewRawString(Factory* factory,
+                                             int length,
+                                             PretenureFlag pretenure) {
+  return factory->NewRawTwoByteString(length, pretenure);
 }
 
 template <>
-inline Handle<SeqAsciiString> NewRawString(Factory* factory, int length) {
-  return factory->NewRawAsciiString(length, NOT_TENURED);
+inline Handle<SeqOneByteString> NewRawString(Factory* factory,
+                                           int length,
+                                           PretenureFlag pretenure) {
+  return factory->NewRawOneByteString(length, pretenure);
 }
 
 
@@ -456,8 +506,8 @@ Handle<String> JsonParser<seq_ascii>::SlowScanJsonString(
   int count = end - start;
   int max_length = count + source_length_ - position_;
   int length = Min(max_length, Max(kInitialSpecialStringLength, 2 * count));
-  Handle<StringType> seq_str = NewRawString<StringType>(isolate()->factory(),
-                                                        length);
+  Handle<StringType> seq_str =
+      NewRawString<StringType>(factory(), length, pretenure_);
   // Copy prefix into seq_str.
   SinkChar* dest = seq_str->GetChars();
   String::WriteToFlat(*prefix, dest, start, end);
@@ -480,7 +530,7 @@ Handle<String> JsonParser<seq_ascii>::SlowScanJsonString(
         SeqStringSet(seq_str, count++, c0_);
         Advance();
       } else {
-        // StringType is SeqAsciiString and we just read a non-ASCII char.
+        // StringType is SeqOneByteString and we just read a non-ASCII char.
         return SlowScanJsonString<SeqTwoByteString, uc16>(seq_str, 0, count);
       }
     } else {
@@ -520,7 +570,7 @@ Handle<String> JsonParser<seq_ascii>::SlowScanJsonString(
             SeqStringSet(seq_str, count++, value);
             break;
           } else {
-            // StringType is SeqAsciiString and we just read a non-ASCII char.
+            // StringType is SeqOneByteString and we just read a non-ASCII char.
             position_ -= 6;  // Rewind position_ to \ in \uxxxx.
             Advance();
             return SlowScanJsonString<SeqTwoByteString, uc16>(seq_str,
@@ -561,8 +611,58 @@ Handle<String> JsonParser<seq_ascii>::ScanJsonString() {
   Advance();
   if (c0_ == '"') {
     AdvanceSkipWhitespace();
-    return Handle<String>(isolate()->heap()->empty_string());
+    return factory()->empty_string();
+  }
+
+  if (seq_ascii && is_symbol) {
+    // Fast path for existing symbols.  If the the string being parsed is not
+    // a known symbol, contains backslashes or unexpectedly reaches the end of
+    // string, return with an empty handle.
+    uint32_t running_hash = isolate()->heap()->HashSeed();
+    int position = position_;
+    uc32 c0 = c0_;
+    do {
+      if (c0 == '\\') {
+        c0_ = c0;
+        int beg_pos = position_;
+        position_ = position;
+        return SlowScanJsonString<SeqOneByteString, char>(source_,
+                                                        beg_pos,
+                                                        position_);
+      }
+      if (c0 < 0x20) return Handle<String>::null();
+      running_hash = StringHasher::AddCharacterCore(running_hash, c0);
+      position++;
+      if (position >= source_length_) return Handle<String>::null();
+      c0 = seq_source_->SeqOneByteStringGet(position);
+    } while (c0 != '"');
+    int length = position - position_;
+    uint32_t hash = (length <= String::kMaxHashCalcLength)
+        ? StringHasher::GetHashCore(running_hash) : length;
+    Vector<const char> string_vector(
+        seq_source_->GetChars() + position_, length);
+    SymbolTable* symbol_table = isolate()->heap()->symbol_table();
+    uint32_t capacity = symbol_table->Capacity();
+    uint32_t entry = SymbolTable::FirstProbe(hash, capacity);
+    uint32_t count = 1;
+    while (true) {
+      Object* element = symbol_table->KeyAt(entry);
+      if (element == isolate()->heap()->undefined_value()) {
+        // Lookup failure.
+        break;
+      }
+      if (element != isolate()->heap()->the_hole_value() &&
+          String::cast(element)->IsAsciiEqualTo(string_vector)) {
+        // Lookup success, update the current position.
+        position_ = position;
+        // Advance past the last '"'.
+        AdvanceSkipWhitespace();
+        return Handle<String>(String::cast(element), isolate());
+      }
+      entry = SymbolTable::NextProbe(entry, count++, capacity);
+    }
   }
+
   int beg_pos = position_;
   // Fast case for ASCII only without escape characters.
   do {
@@ -577,7 +677,7 @@ Handle<String> JsonParser<seq_ascii>::ScanJsonString() {
                                                           position_);
       }
     } else {
-      return SlowScanJsonString<SeqAsciiString, char>(source_,
+      return SlowScanJsonString<SeqOneByteString, char>(source_,
                                                       beg_pos,
                                                       position_);
     }
@@ -585,12 +685,12 @@ Handle<String> JsonParser<seq_ascii>::ScanJsonString() {
   int length = position_ - beg_pos;
   Handle<String> result;
   if (seq_ascii && is_symbol) {
-    result = isolate()->factory()->LookupAsciiSymbol(seq_source_,
-                                                     beg_pos,
-                                                     length);
+    result = factory()->LookupAsciiSymbol(seq_source_,
+                                          beg_pos,
+                                          length);
   } else {
-    result = isolate()->factory()->NewRawAsciiString(length);
-    char* dest = SeqAsciiString::cast(*result)->GetChars();
+    result = factory()->NewRawOneByteString(length, pretenure_);
+    char* dest = SeqOneByteString::cast(*result)->GetChars();
     String::WriteToFlat(*source_, dest, beg_pos, position_);
   }
   ASSERT_EQ('"', c0_);
diff --git a/deps/v8/src/json-stringifier.h b/deps/v8/src/json-stringifier.h
new file mode 100644
index 0000000000..7a8af30eb8
--- /dev/null
+++ b/deps/v8/src/json-stringifier.h
@@ -0,0 +1,748 @@
+// Copyright 2012 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#ifndef V8_JSON_STRINGIFIER_H_
+#define V8_JSON_STRINGIFIER_H_
+
+#include "v8.h"
+#include "v8utils.h"
+#include "v8conversions.h"
+
+namespace v8 {
+namespace internal {
+
+class BasicJsonStringifier BASE_EMBEDDED {
+ public:
+  explicit BasicJsonStringifier(Isolate* isolate);
+
+  MaybeObject* Stringify(Handle<Object> object);
+
+ private:
+  static const int kInitialPartLength = 32;
+  static const int kMaxPartLength = 16 * 1024;
+  static const int kPartLengthGrowthFactor = 2;
+
+  enum Result { UNCHANGED, SUCCESS, EXCEPTION, CIRCULAR, STACK_OVERFLOW };
+
+  void Extend();
+
+  void ChangeEncoding();
+
+  void ShrinkCurrentPart();
+
+  template <bool is_ascii, typename Char>
+  INLINE(void Append_(Char c));
+
+  template <bool is_ascii, typename Char>
+  INLINE(void Append_(const Char* chars));
+
+  INLINE(void Append(char c)) {
+    if (is_ascii_) {
+      Append_<true>(c);
+    } else {
+      Append_<false>(c);
+    }
+  }
+
+  INLINE(void Append(const char* chars)) {
+    if (is_ascii_) {
+      Append_<true>(chars);
+    } else {
+      Append_<false>(chars);
+    }
+  }
+
+  Handle<Object> ApplyToJsonFunction(Handle<Object> object,
+                                     Handle<Object> key);
+
+  Result SerializeGeneric(Handle<Object> object,
+                          Handle<Object> key,
+                          bool deferred_comma,
+                          bool deferred_key);
+
+  // Entry point to serialize the object.
+  INLINE(Result SerializeObject(Handle<Object> obj)) {
+    return Serialize_<false>(obj, false, factory_->empty_string());
+  }
+
+  // Serialize an array element.
+  // The index may serve as argument for the toJSON function.
+  INLINE(Result SerializeElement(Handle<Object> object, int i)) {
+    return Serialize_<false>(object, false, Handle<Object>(Smi::FromInt(i)));
+  }
+
+  // Serialize a object property.
+  // The key may or may not be serialized depending on the property.
+  // The key may also serve as argument for the toJSON function.
+  INLINE(Result SerializeProperty(Handle<Object> object,
+                                  bool deferred_comma,
+                                  Handle<String> deferred_key)) {
+    ASSERT(!deferred_key.is_null());
+    return Serialize_<true>(object, deferred_comma, deferred_key);
+  }
+
+  template <bool deferred_string_key>
+  Result Serialize_(Handle<Object> object, bool comma, Handle<Object> key);
+
+  void SerializeDeferredKey(bool deferred_comma, Handle<Object> deferred_key) {
+    if (deferred_comma) Append(',');
+    SerializeString(Handle<String>::cast(deferred_key));
+    Append(':');
+  }
+
+  Result SerializeSmi(Smi* object);
+
+  Result SerializeDouble(double number);
+  INLINE(Result SerializeHeapNumber(Handle<HeapNumber> object)) {
+    return SerializeDouble(object->value());
+  }
+
+  Result SerializeJSValue(Handle<JSValue> object);
+
+  INLINE(Result SerializeJSArray(Handle<JSArray> object));
+  INLINE(Result SerializeJSObject(Handle<JSObject> object));
+
+  Result SerializeJSArraySlow(Handle<JSArray> object, int length);
+
+  void SerializeString(Handle<String> object);
+
+  template <typename SrcChar, typename DestChar>
+  INLINE(void SerializeStringUnchecked_(const SrcChar* src,
+                                        DestChar* dest,
+                                        int length));
+
+  template <bool is_ascii, typename Char>
+  INLINE(void SerializeString_(Handle<String> string));
+
+  template <typename Char>
+  INLINE(bool DoNotEscape(Char c));
+
+  template <typename Char>
+  INLINE(Vector<const Char> GetCharVector(Handle<String> string));
+
+  Result StackPush(Handle<Object> object);
+  void StackPop();
+
+  INLINE(Handle<String> accumulator()) {
+    return Handle<String>(String::cast(accumulator_store_->value()), isolate_);
+  }
+
+  INLINE(void set_accumulator(Handle<String> string)) {
+    return accumulator_store_->set_value(*string);
+  }
+
+  Isolate* isolate_;
+  Factory* factory_;
+  // We use a value wrapper for the string accumulator to keep the
+  // (indirect) handle to it in the outermost handle scope.
+  Handle<JSValue> accumulator_store_;
+  Handle<String> current_part_;
+  Handle<String> tojson_symbol_;
+  Handle<JSArray> stack_;
+  int current_index_;
+  int part_length_;
+  bool is_ascii_;
+
+  static const int kJsonEscapeTableEntrySize = 8;
+  static const char* const JsonEscapeTable;
+};
+
+
+// Translation table to escape ASCII characters.
+// Table entries start at a multiple of 8 and are null-terminated.
+const char* const BasicJsonStringifier::JsonEscapeTable =
+    "\\u0000\0 \\u0001\0 \\u0002\0 \\u0003\0 "
+    "\\u0004\0 \\u0005\0 \\u0006\0 \\u0007\0 "
+    "\\b\0     \\t\0     \\n\0     \\u000b\0 "
+    "\\f\0     \\r\0     \\u000e\0 \\u000f\0 "
+    "\\u0010\0 \\u0011\0 \\u0012\0 \\u0013\0 "
+    "\\u0014\0 \\u0015\0 \\u0016\0 \\u0017\0 "
+    "\\u0018\0 \\u0019\0 \\u001a\0 \\u001b\0 "
+    "\\u001c\0 \\u001d\0 \\u001e\0 \\u001f\0 "
+    " \0      !\0      \\\"\0     #\0      "
+    "$\0      %\0      &\0      '\0      "
+    "(\0      )\0      *\0      +\0      "
+    ",\0      -\0      .\0      /\0      "
+    "0\0      1\0      2\0      3\0      "
+    "4\0      5\0      6\0      7\0      "
+    "8\0      9\0      :\0      ;\0      "
+    "<\0      =\0      >\0      ?\0      "
+    "@\0      A\0      B\0      C\0      "
+    "D\0      E\0      F\0      G\0      "
+    "H\0      I\0      J\0      K\0      "
+    "L\0      M\0      N\0      O\0      "
+    "P\0      Q\0      R\0      S\0      "
+    "T\0      U\0      V\0      W\0      "
+    "X\0      Y\0      Z\0      [\0      "
+    "\\\\\0     ]\0      ^\0      _\0      "
+    "`\0      a\0      b\0      c\0      "
+    "d\0      e\0      f\0      g\0      "
+    "h\0      i\0      j\0      k\0      "
+    "l\0      m\0      n\0      o\0      "
+    "p\0      q\0      r\0      s\0      "
+    "t\0      u\0      v\0      w\0      "
+    "x\0      y\0      z\0      {\0      "
+    "|\0      }\0      ~\0      \177\0      ";
+
+
+BasicJsonStringifier::BasicJsonStringifier(Isolate* isolate)
+    : isolate_(isolate), current_index_(0), is_ascii_(true) {
+  factory_ = isolate_->factory();
+  accumulator_store_ = Handle<JSValue>::cast(
+                           factory_->ToObject(factory_->empty_string()));
+  part_length_ = kInitialPartLength;
+  current_part_ = factory_->NewRawOneByteString(kInitialPartLength);
+  tojson_symbol_ = factory_->LookupAsciiSymbol("toJSON");
+  stack_ = factory_->NewJSArray(8);
+}
+
+
+MaybeObject* BasicJsonStringifier::Stringify(Handle<Object> object) {
+  switch (SerializeObject(object)) {
+    case UNCHANGED:
+      return isolate_->heap()->undefined_value();
+    case SUCCESS:
+      ShrinkCurrentPart();
+      return *factory_->NewConsString(accumulator(), current_part_);
+    case CIRCULAR:
+      return isolate_->Throw(*factory_->NewTypeError(
+                 "circular_structure", HandleVector<Object>(NULL, 0)));
+    case STACK_OVERFLOW:
+      return isolate_->StackOverflow();
+    default:
+      return Failure::Exception();
+  }
+}
+
+
+template <bool is_ascii, typename Char>
+void BasicJsonStringifier::Append_(Char c) {
+  if (is_ascii) {
+    SeqOneByteString::cast(*current_part_)->SeqOneByteStringSet(
+        current_index_++, c);
+  } else {
+    SeqTwoByteString::cast(*current_part_)->SeqTwoByteStringSet(
+        current_index_++, c);
+  }
+  if (current_index_ == part_length_) Extend();
+}
+
+
+template <bool is_ascii, typename Char>
+void BasicJsonStringifier::Append_(const Char* chars) {
+  for ( ; *chars != '\0'; chars++) Append_<is_ascii, Char>(*chars);
+}
+
+
+Handle<Object> BasicJsonStringifier::ApplyToJsonFunction(
+    Handle<Object> object, Handle<Object> key) {
+  LookupResult lookup(isolate_);
+  JSObject::cast(*object)->LookupRealNamedProperty(*tojson_symbol_, &lookup);
+  if (!lookup.IsProperty()) return object;
+  PropertyAttributes attr;
+  Handle<Object> fun =
+      Object::GetProperty(object, object, &lookup, tojson_symbol_, &attr);
+  if (!fun->IsJSFunction()) return object;
+
+  // Call toJSON function.
+  if (key->IsSmi()) key = factory_->NumberToString(key);
+  Handle<Object> argv[] = { key };
+  bool has_exception = false;
+  HandleScope scope(isolate_);
+  object = Execution::Call(fun, object, 1, argv, &has_exception);
+  // Return empty handle to signal an exception.
+  if (has_exception) return Handle<Object>::null();
+  return scope.CloseAndEscape(object);
+}
+
+
+BasicJsonStringifier::Result BasicJsonStringifier::StackPush(
+    Handle<Object> object) {
+  StackLimitCheck check(isolate_);
+  if (check.HasOverflowed()) return STACK_OVERFLOW;
+
+  int length = Smi::cast(stack_->length())->value();
+  FixedArray* elements = FixedArray::cast(stack_->elements());
+  for (int i = 0; i < length; i++) {
+    if (elements->get(i) == *object) {
+      return CIRCULAR;
+    }
+  }
+  stack_->EnsureSize(length + 1);
+  FixedArray::cast(stack_->elements())->set(length, *object);
+  stack_->set_length(Smi::FromInt(length + 1));
+  return SUCCESS;
+}
+
+
+void BasicJsonStringifier::StackPop() {
+  int length = Smi::cast(stack_->length())->value();
+  stack_->set_length(Smi::FromInt(length - 1));
+}
+
+
+template <bool deferred_string_key>
+BasicJsonStringifier::Result BasicJsonStringifier::Serialize_(
+    Handle<Object> object, bool comma, Handle<Object> key) {
+  if (object->IsJSObject()) {
+    object = ApplyToJsonFunction(object, key);
+    if (object.is_null()) return EXCEPTION;
+  }
+
+  if (object->IsSmi()) {
+    if (deferred_string_key) SerializeDeferredKey(comma, key);
+    return SerializeSmi(Smi::cast(*object));
+  }
+
+  switch (HeapObject::cast(*object)->map()->instance_type()) {
+    case HEAP_NUMBER_TYPE:
+      if (deferred_string_key) SerializeDeferredKey(comma, key);
+      return SerializeHeapNumber(Handle<HeapNumber>::cast(object));
+    case ODDBALL_TYPE:
+      switch (Oddball::cast(*object)->kind()) {
+        case Oddball::kFalse:
+          if (deferred_string_key) SerializeDeferredKey(comma, key);
+          Append("false");
+          return SUCCESS;
+        case Oddball::kTrue:
+          if (deferred_string_key) SerializeDeferredKey(comma, key);
+          Append("true");
+          return SUCCESS;
+        case Oddball::kNull:
+          if (deferred_string_key) SerializeDeferredKey(comma, key);
+          Append("null");
+          return SUCCESS;
+        default:
+          return UNCHANGED;
+      }
+    case JS_ARRAY_TYPE:
+      if (deferred_string_key) SerializeDeferredKey(comma, key);
+      return SerializeJSArray(Handle<JSArray>::cast(object));
+    case JS_VALUE_TYPE:
+      if (deferred_string_key) SerializeDeferredKey(comma, key);
+      return SerializeJSValue(Handle<JSValue>::cast(object));
+    case JS_FUNCTION_TYPE:
+      return UNCHANGED;
+    default:
+      if (object->IsString()) {
+        if (deferred_string_key) SerializeDeferredKey(comma, key);
+        SerializeString(Handle<String>::cast(object));
+        return SUCCESS;
+      } else if (object->IsJSObject()) {
+        if (deferred_string_key) SerializeDeferredKey(comma, key);
+        return SerializeJSObject(Handle<JSObject>::cast(object));
+      } else {
+        return SerializeGeneric(object, key, comma, deferred_string_key);
+      }
+  }
+}
+
+
+BasicJsonStringifier::Result BasicJsonStringifier::SerializeGeneric(
+    Handle<Object> object,
+    Handle<Object> key,
+    bool deferred_comma,
+    bool deferred_key) {
+  Handle<JSObject> builtins(isolate_->native_context()->builtins());
+  Handle<JSFunction> builtin =
+      Handle<JSFunction>::cast(GetProperty(builtins, "JSONSerializeAdapter"));
+
+  Handle<Object> argv[] = { key, object };
+  bool has_exception = false;
+  Handle<Object> result =
+      Execution::Call(builtin, object, 2, argv, &has_exception);
+  if (has_exception) return EXCEPTION;
+  if (result->IsUndefined()) return UNCHANGED;
+  if (deferred_key) {
+    if (key->IsSmi()) key = factory_->NumberToString(key);
+    SerializeDeferredKey(deferred_comma, key);
+  }
+
+  Handle<String> result_string = Handle<String>::cast(result);
+  // Shrink current part, attach it to the accumulator, also attach the result
+  // string to the accumulator, and allocate a new part.
+  ShrinkCurrentPart();  // Shrink.
+  part_length_ = kInitialPartLength;  // Allocate conservatively.
+  Extend();             // Attach current part and allocate new part.
+  // Attach result string to the accumulator.
+  set_accumulator(factory_->NewConsString(accumulator(), result_string));
+  return SUCCESS;
+}
+
+
+BasicJsonStringifier::Result BasicJsonStringifier::SerializeJSValue(
+    Handle<JSValue> object) {
+  bool has_exception = false;
+  String* class_name = object->class_name();
+  if (class_name == isolate_->heap()->String_symbol()) {
+    Handle<Object> value = Execution::ToString(object, &has_exception);
+    if (has_exception) return EXCEPTION;
+    SerializeString(Handle<String>::cast(value));
+  } else if (class_name == isolate_->heap()->Number_symbol()) {
+    Handle<Object> value = Execution::ToNumber(object, &has_exception);
+    if (has_exception) return EXCEPTION;
+    if (value->IsSmi()) return SerializeSmi(Smi::cast(*value));
+    SerializeHeapNumber(Handle<HeapNumber>::cast(value));
+  } else {
+    ASSERT(class_name == isolate_->heap()->Boolean_symbol());
+    Object* value = JSValue::cast(*object)->value();
+    ASSERT(value->IsBoolean());
+    Append(value->IsTrue() ? "true" : "false");
+  }
+  return SUCCESS;
+}
+
+
+BasicJsonStringifier::Result BasicJsonStringifier::SerializeSmi(Smi* object) {
+  static const int kBufferSize = 100;
+  char chars[kBufferSize];
+  Vector<char> buffer(chars, kBufferSize);
+  Append(IntToCString(object->value(), buffer));
+  return SUCCESS;
+}
+
+
+BasicJsonStringifier::Result BasicJsonStringifier::SerializeDouble(
+    double number) {
+  if (isinf(number) || isnan(number)) {
+    Append("null");
+    return SUCCESS;
+  }
+  static const int kBufferSize = 100;
+  char chars[kBufferSize];
+  Vector<char> buffer(chars, kBufferSize);
+  Append(DoubleToCString(number, buffer));
+  return SUCCESS;
+}
+
+
+BasicJsonStringifier::Result BasicJsonStringifier::SerializeJSArray(
+    Handle<JSArray> object) {
+  HandleScope handle_scope(isolate_);
+  Result stack_push = StackPush(object);
+  if (stack_push != SUCCESS) return stack_push;
+  int length = Smi::cast(object->length())->value();
+  Append('[');
+  switch (object->GetElementsKind()) {
+    case FAST_SMI_ELEMENTS: {
+      Handle<FixedArray> elements(
+          FixedArray::cast(object->elements()), isolate_);
+      for (int i = 0; i < length; i++) {
+        if (i > 0) Append(',');
+        SerializeSmi(Smi::cast(elements->get(i)));
+      }
+      break;
+    }
+    case FAST_DOUBLE_ELEMENTS: {
+      Handle<FixedDoubleArray> elements(
+          FixedDoubleArray::cast(object->elements()), isolate_);
+      for (int i = 0; i < length; i++) {
+        if (i > 0) Append(',');
+        SerializeDouble(elements->get_scalar(i));
+      }
+      break;
+    }
+    case FAST_ELEMENTS: {
+      Handle<FixedArray> elements(
+          FixedArray::cast(object->elements()), isolate_);
+      for (int i = 0; i < length; i++) {
+        if (i > 0) Append(',');
+        Result result =
+            SerializeElement(Handle<Object>(elements->get(i), isolate_), i);
+        if (result == SUCCESS) continue;
+        if (result == UNCHANGED) {
+          Append("null");
+        } else {
+          return result;
+        }
+      }
+      break;
+    }
+    // TODO(yangguo):  The FAST_HOLEY_* cases could be handled in a faster way.
+    // They resemble the non-holey cases except that a prototype chain lookup
+    // is necessary for holes.
+    default: {
+      Result result = SerializeJSArraySlow(object, length);
+      if (result != SUCCESS) return result;
+      break;
+    }
+  }
+  Append(']');
+  StackPop();
+  current_part_ = handle_scope.CloseAndEscape(current_part_);
+  return SUCCESS;
+}
+
+
+BasicJsonStringifier::Result BasicJsonStringifier::SerializeJSArraySlow(
+    Handle<JSArray> object, int length) {
+  for (int i = 0; i < length; i++) {
+    if (i > 0) Append(',');
+    Handle<Object> element = Object::GetElement(object, i);
+    if (element->IsUndefined()) {
+      Append("null");
+    } else {
+      Result result = SerializeElement(element, i);
+      if (result == SUCCESS) continue;
+      if (result == UNCHANGED) {
+        Append("null");
+      } else {
+        return result;
+      }
+    }
+  }
+  return SUCCESS;
+}
+
+
+BasicJsonStringifier::Result BasicJsonStringifier::SerializeJSObject(
+    Handle<JSObject> object) {
+  HandleScope handle_scope(isolate_);
+  Result stack_push = StackPush(object);
+  if (stack_push != SUCCESS) return stack_push;
+  if (object->IsJSGlobalProxy()) {
+    object = Handle<JSObject>(
+                 JSObject::cast(object->GetPrototype()), isolate_);
+    ASSERT(object->IsGlobalObject());
+  }
+
+  Append('{');
+  bool comma = false;
+
+  if (object->HasFastProperties() &&
+      !object->HasIndexedInterceptor() &&
+      !object->HasNamedInterceptor() &&
+      object->elements()->length() == 0) {
+    Handle<Map> map(object->map());
+    for (int i = 0; i < map->NumberOfOwnDescriptors(); i++) {
+      Handle<String> key(map->instance_descriptors()->GetKey(i), isolate_);
+      PropertyDetails details = map->instance_descriptors()->GetDetails(i);
+      if (details.IsDontEnum() || details.IsDeleted()) continue;
+      Handle<Object> property;
+      if (details.type() == FIELD && *map == object->map()) {
+        property = Handle<Object>(
+                       object->FastPropertyAt(
+                           map->instance_descriptors()->GetFieldIndex(i)),
+                       isolate_);
+      } else {
+        property = GetProperty(object, key);
+        if (property.is_null()) return EXCEPTION;
+      }
+      Result result = SerializeProperty(property, comma, key);
+      if (!comma && result == SUCCESS) comma = true;
+      if (result >= EXCEPTION) return result;
+    }
+  } else {
+    bool has_exception = false;
+    Handle<FixedArray> contents =
+        GetKeysInFixedArrayFor(object, LOCAL_ONLY, &has_exception);
+    if (has_exception) return EXCEPTION;
+
+    for (int i = 0; i < contents->length(); i++) {
+      Object* key = contents->get(i);
+      Handle<String> key_handle;
+      Handle<Object> property;
+      if (key->IsString()) {
+        key_handle = Handle<String>(String::cast(key), isolate_);
+        property = GetProperty(object, key_handle);
+      } else {
+        ASSERT(key->IsNumber());
+        key_handle = factory_->NumberToString(Handle<Object>(key, isolate_));
+        uint32_t index;
+        if (key->IsSmi()) {
+          property = Object::GetElement(object, Smi::cast(key)->value());
+        } else if (key_handle->AsArrayIndex(&index)) {
+          property = Object::GetElement(object, index);
+        } else {
+          property = GetProperty(object, key_handle);
+        }
+      }
+      if (property.is_null()) return EXCEPTION;
+      Result result = SerializeProperty(property, comma, key_handle);
+      if (!comma && result == SUCCESS) comma = true;
+      if (result >= EXCEPTION) return result;
+    }
+  }
+
+  Append('}');
+  StackPop();
+  current_part_ = handle_scope.CloseAndEscape(current_part_);
+  return SUCCESS;
+}
+
+
+void BasicJsonStringifier::ShrinkCurrentPart() {
+  ASSERT(current_index_ < part_length_);
+  current_part_ = Handle<String>(
+      SeqString::cast(*current_part_)->Truncate(current_index_), isolate_);
+}
+
+
+void BasicJsonStringifier::Extend() {
+  set_accumulator(factory_->NewConsString(accumulator(), current_part_));
+  if (part_length_ <= kMaxPartLength / kPartLengthGrowthFactor) {
+    part_length_ *= kPartLengthGrowthFactor;
+  }
+  if (is_ascii_) {
+    current_part_ = factory_->NewRawOneByteString(part_length_);
+  } else {
+    current_part_ = factory_->NewRawTwoByteString(part_length_);
+  }
+  current_index_ = 0;
+}
+
+
+void BasicJsonStringifier::ChangeEncoding() {
+  ShrinkCurrentPart();
+  set_accumulator(factory_->NewConsString(accumulator(), current_part_));
+  current_part_ = factory_->NewRawTwoByteString(part_length_);
+  current_index_ = 0;
+  is_ascii_ = false;
+}
+
+
+template <typename SrcChar, typename DestChar>
+void BasicJsonStringifier::SerializeStringUnchecked_(const SrcChar* src,
+                                                     DestChar* dest,
+                                                     int length) {
+  dest += current_index_;
+  DestChar* dest_start = dest;
+
+  // Assert that uc16 character is not truncated down to 8 bit.
+  // The <uc16, char> version of this method must not be called.
+  ASSERT(sizeof(*dest) >= sizeof(*src));
+
+  for (int i = 0; i < length; i++) {
+    SrcChar c = src[i];
+    if (DoNotEscape(c)) {
+      *(dest++) = static_cast<DestChar>(c);
+    } else {
+      const char* chars = &JsonEscapeTable[c * kJsonEscapeTableEntrySize];
+      while (*chars != '\0') *(dest++) = *(chars++);
+    }
+  }
+
+  current_index_ += static_cast<int>(dest - dest_start);
+}
+
+
+template <bool is_ascii, typename Char>
+void BasicJsonStringifier::SerializeString_(Handle<String> string) {
+  int length = string->length();
+  Append_<is_ascii, char>('"');
+  // We make a rough estimate to find out if the current string can be
+  // serialized without allocating a new string part. The worst case length of
+  // an escaped character is 6.  Shifting the remainin string length right by 3
+  // is a more pessimistic estimate, but faster to calculate.
+
+  if (((part_length_ - current_index_) >> 3) > length) {
+    AssertNoAllocation no_allocation;
+    Vector<const Char> vector = GetCharVector<Char>(string);
+    if (is_ascii) {
+      SerializeStringUnchecked_(
+          vector.start(),
+          SeqOneByteString::cast(*current_part_)->GetChars(),
+          length);
+    } else {
+      SerializeStringUnchecked_(
+          vector.start(),
+          SeqTwoByteString::cast(*current_part_)->GetChars(),
+          length);
+    }
+  } else {
+    String* string_location = *string;
+    Vector<const Char> vector = GetCharVector<Char>(string);
+    for (int i = 0; i < length; i++) {
+      Char c = vector[i];
+      if (DoNotEscape(c)) {
+        Append_<is_ascii, Char>(c);
+      } else {
+        Append_<is_ascii, char>(
+            &JsonEscapeTable[c * kJsonEscapeTableEntrySize]);
+      }
+      // If GC moved the string, we need to refresh the vector.
+      if (*string != string_location) {
+        vector = GetCharVector<Char>(string);
+        string_location = *string;
+      }
+    }
+  }
+
+  Append_<is_ascii, char>('"');
+}
+
+
+template <>
+bool BasicJsonStringifier::DoNotEscape(char c) {
+  return c >= '#' && c <= '~' && c != '\\';
+}
+
+
+template <>
+bool BasicJsonStringifier::DoNotEscape(uc16 c) {
+  return (c >= 0x80) || (c >= '#' && c <= '~' && c != '\\');
+}
+
+
+template <>
+Vector<const char> BasicJsonStringifier::GetCharVector(Handle<String> string) {
+  String::FlatContent flat = string->GetFlatContent();
+  ASSERT(flat.IsAscii());
+  return flat.ToAsciiVector();
+}
+
+
+template <>
+Vector<const uc16> BasicJsonStringifier::GetCharVector(Handle<String> string) {
+  String::FlatContent flat = string->GetFlatContent();
+  ASSERT(flat.IsTwoByte());
+  return flat.ToUC16Vector();
+}
+
+
+void BasicJsonStringifier::SerializeString(Handle<String> object) {
+  FlattenString(object);
+  String::FlatContent flat = object->GetFlatContent();
+  if (is_ascii_) {
+    if (flat.IsAscii()) {
+      SerializeString_<true, char>(object);
+    } else {
+      ChangeEncoding();
+      SerializeString(object);
+    }
+  } else {
+    if (flat.IsAscii()) {
+      SerializeString_<false, char>(object);
+    } else {
+      SerializeString_<false, uc16>(object);
+    }
+  }
+}
+
+} }  // namespace v8::internal
+
+#endif  // V8_JSON_STRINGIFIER_H_
diff --git a/deps/v8/src/json.js b/deps/v8/src/json.js
index 85224b0f05..9ab1a31e59 100644
--- a/deps/v8/src/json.js
+++ b/deps/v8/src/json.js
@@ -178,141 +178,9 @@ function JSONSerialize(key, holder, replacer, stack, indent, gap) {
 }
 
 
-function BasicSerializeArray(value, stack, builder) {
-  var len = value.length;
-  if (len == 0) {
-    builder.push("[]");
-    return;
-  }
-  if (!%PushIfAbsent(stack, value)) {
-    throw MakeTypeError('circular_structure', $Array());
-  }
-  builder.push("[");
-  var val = value[0];
-  if (IS_STRING(val)) {
-    // First entry is a string. Remaining entries are likely to be strings too.
-    var array_string = %QuoteJSONStringArray(value);
-    if (!IS_UNDEFINED(array_string)) {
-      // array_string also includes bracket characters so we are done.
-      builder[builder.length - 1] = array_string;
-      stack.pop();
-      return;
-    } else {
-      builder.push(%QuoteJSONString(val));
-      for (var i = 1; i < len; i++) {
-        val = value[i];
-        if (IS_STRING(val)) {
-          builder.push(%QuoteJSONStringComma(val));
-        } else {
-          builder.push(",");
-          var before = builder.length;
-          BasicJSONSerialize(i, val, stack, builder);
-          if (before == builder.length) builder[before - 1] = ",null";
-        }
-      }
-    }
-  } else if (IS_NUMBER(val)) {
-    // First entry is a number. Remaining entries are likely to be numbers too.
-    builder.push(JSON_NUMBER_TO_STRING(val));
-    for (var i = 1; i < len; i++) {
-      builder.push(",");
-      val = value[i];
-      if (IS_NUMBER(val)) {
-        builder.push(JSON_NUMBER_TO_STRING(val));
-      } else {
-        var before = builder.length;
-        BasicJSONSerialize(i, val, stack, builder);
-        if (before == builder.length) builder[before - 1] = ",null";
-      }
-    }
-  } else {
-    var before = builder.length;
-    BasicJSONSerialize(0, val, stack, builder);
-    if (before == builder.length) builder.push("null");
-    for (var i = 1; i < len; i++) {
-      builder.push(",");
-      before = builder.length;
-      BasicJSONSerialize(i, value[i], stack, builder);
-      if (before == builder.length) builder[before - 1] = ",null";
-    }
-  }
-  stack.pop();
-  builder.push("]");
-}
-
-
-function BasicSerializeObject(value, stack, builder) {
-  if (!%PushIfAbsent(stack, value)) {
-    throw MakeTypeError('circular_structure', $Array());
-  }
-  builder.push("{");
-  var first = true;
-  var keys = %ObjectKeys(value);
-  var len = keys.length;
-  for (var i = 0; i < len; i++) {
-    var p = keys[i];
-    if (!first) {
-      builder.push(%QuoteJSONStringComma(p));
-    } else {
-      builder.push(%QuoteJSONString(p));
-    }
-    builder.push(":");
-    var before = builder.length;
-    BasicJSONSerialize(p, value[p], stack, builder);
-    if (before == builder.length) {
-      builder.pop();
-      builder.pop();
-    } else {
-      first = false;
-    }
-  }
-  stack.pop();
-  builder.push("}");
-}
-
-
-function BasicJSONSerialize(key, value, stack, builder) {
-  if (IS_SPEC_OBJECT(value)) {
-    var toJSON = value.toJSON;
-    if (IS_SPEC_FUNCTION(toJSON)) {
-      value = %_CallFunction(value, ToString(key), toJSON);
-    }
-  }
-  if (IS_STRING(value)) {
-    builder.push(value !== "" ? %QuoteJSONString(value) : '""');
-  } else if (IS_NUMBER(value)) {
-    builder.push(JSON_NUMBER_TO_STRING(value));
-  } else if (IS_BOOLEAN(value)) {
-    builder.push(value ? "true" : "false");
-  } else if (IS_NULL(value)) {
-    builder.push("null");
-  } else if (IS_SPEC_OBJECT(value) && !(typeof value == "function")) {
-    // Value is a non-callable object.
-    // Unwrap value if necessary
-    if (IS_NUMBER_WRAPPER(value)) {
-      value = ToNumber(value);
-      builder.push(JSON_NUMBER_TO_STRING(value));
-    } else if (IS_STRING_WRAPPER(value)) {
-      builder.push(%QuoteJSONString(ToString(value)));
-    } else if (IS_BOOLEAN_WRAPPER(value)) {
-      builder.push(%_ValueOf(value) ? "true" : "false");
-    } else if (IS_ARRAY(value)) {
-      BasicSerializeArray(value, stack, builder);
-    } else {
-      BasicSerializeObject(value, stack, builder);
-    }
-  }
-}
-
-
 function JSONStringify(value, replacer, space) {
   if (%_ArgumentsLength() == 1) {
-    var builder = new InternalArray();
-    BasicJSONSerialize('', value, new InternalArray(), builder);
-    if (builder.length == 0) return;
-    var result = %_FastAsciiArrayJoin(builder, "");
-    if (!IS_UNDEFINED(result)) return result;
-    return %StringBuilderConcat(builder, builder.length, "");
+    return %BasicJSONStringify(value);
   }
   if (IS_OBJECT(space)) {
     // Unwrap 'space' if it is wrapped
@@ -338,6 +206,7 @@ function JSONStringify(value, replacer, space) {
   return JSONSerialize('', {'': value}, replacer, new InternalArray(), "", gap);
 }
 
+
 function SetUpJSON() {
   %CheckIsBootstrapping();
   InstallFunctions($JSON, DONT_ENUM, $Array(
@@ -346,4 +215,12 @@ function SetUpJSON() {
   ));
 }
 
+
+function JSONSerializeAdapter(key, object) {
+  var holder = {};
+  holder[key] = object;
+  // No need to pass the actual holder since there is no replacer function.
+  return JSONSerialize(key, holder, void 0, new InternalArray(), "", "");
+}
+
 SetUpJSON();
diff --git a/deps/v8/src/jsregexp.cc b/deps/v8/src/jsregexp.cc
index e59170d5a3..813208c959 100644
--- a/deps/v8/src/jsregexp.cc
+++ b/deps/v8/src/jsregexp.cc
@@ -529,7 +529,7 @@ int RegExpImpl::IrregexpPrepare(Handle<JSRegExp> regexp,
   if (!subject->IsFlat()) FlattenString(subject);
 
   // Check the asciiness of the underlying storage.
-  bool is_ascii = subject->IsAsciiRepresentationUnderneath();
+  bool is_ascii = subject->IsOneByteRepresentationUnderneath();
   if (!EnsureCompiledIrregexp(regexp, subject, is_ascii)) return -1;
 
 #ifdef V8_INTERPRETED_REGEXP
@@ -560,7 +560,7 @@ int RegExpImpl::IrregexpExecRaw(Handle<JSRegExp> regexp,
   ASSERT(index <= subject->length());
   ASSERT(subject->IsFlat());
 
-  bool is_ascii = subject->IsAsciiRepresentationUnderneath();
+  bool is_ascii = subject->IsOneByteRepresentationUnderneath();
 
 #ifndef V8_INTERPRETED_REGEXP
   ASSERT(output_size >= (IrregexpNumberOfCaptures(*irregexp) + 1) * 2);
@@ -596,7 +596,7 @@ int RegExpImpl::IrregexpExecRaw(Handle<JSRegExp> regexp,
     // being internal and external, and even between being ASCII and UC16,
     // but the characters are always the same).
     IrregexpPrepare(regexp, subject);
-    is_ascii = subject->IsAsciiRepresentationUnderneath();
+    is_ascii = subject->IsOneByteRepresentationUnderneath();
   } while (true);
   UNREACHABLE();
   return RE_EXCEPTION;
diff --git a/deps/v8/src/lithium.h b/deps/v8/src/lithium.h
index 923a1594c9..089926e71a 100644
--- a/deps/v8/src/lithium.h
+++ b/deps/v8/src/lithium.h
@@ -133,13 +133,15 @@ class LUnallocated: public LOperand {
   // index in the upper bits.
   static const int kPolicyWidth = 3;
   static const int kLifetimeWidth = 1;
-  static const int kVirtualRegisterWidth = 18;
+  static const int kVirtualRegisterWidth = 15;
 
   static const int kPolicyShift = kKindFieldWidth;
   static const int kLifetimeShift = kPolicyShift + kPolicyWidth;
   static const int kVirtualRegisterShift = kLifetimeShift + kLifetimeWidth;
   static const int kFixedIndexShift =
       kVirtualRegisterShift + kVirtualRegisterWidth;
+  static const int kFixedIndexWidth = 32 - kFixedIndexShift;
+  STATIC_ASSERT(kFixedIndexWidth > 5);
 
   class PolicyField : public BitField<Policy, kPolicyShift, kPolicyWidth> { };
 
@@ -154,8 +156,8 @@ class LUnallocated: public LOperand {
   };
 
   static const int kMaxVirtualRegisters = 1 << kVirtualRegisterWidth;
-  static const int kMaxFixedIndex = 63;
-  static const int kMinFixedIndex = -64;
+  static const int kMaxFixedIndex = (1 << (kFixedIndexWidth - 1)) - 1;
+  static const int kMinFixedIndex = -(1 << (kFixedIndexWidth - 1));
 
   bool HasAnyPolicy() const {
     return policy() == ANY;
@@ -460,6 +462,7 @@ class LEnvironment: public ZoneObject {
                int argument_count,
                int value_count,
                LEnvironment* outer,
+               HEnterInlined* entry,
                Zone* zone)
       : closure_(closure),
         frame_type_(frame_type),
@@ -475,6 +478,7 @@ class LEnvironment: public ZoneObject {
         spilled_registers_(NULL),
         spilled_double_registers_(NULL),
         outer_(outer),
+        entry_(entry),
         zone_(zone) { }
 
   Handle<JSFunction> closure() const { return closure_; }
@@ -491,6 +495,7 @@ class LEnvironment: public ZoneObject {
   }
   const ZoneList<LOperand*>* values() const { return &values_; }
   LEnvironment* outer() const { return outer_; }
+  HEnterInlined* entry() { return entry_; }
 
   void AddValue(LOperand* operand,
                 Representation representation,
@@ -556,6 +561,7 @@ class LEnvironment: public ZoneObject {
   LOperand** spilled_double_registers_;
 
   LEnvironment* outer_;
+  HEnterInlined* entry_;
 
   Zone* zone_;
 };
diff --git a/deps/v8/src/liveedit-debugger.js b/deps/v8/src/liveedit-debugger.js
index cfcdb818c9..451b146bde 100644
--- a/deps/v8/src/liveedit-debugger.js
+++ b/deps/v8/src/liveedit-debugger.js
@@ -76,7 +76,17 @@ Debug.LiveEdit = new function() {
     try {
       new_compile_info = GatherCompileInfo(new_source, script);
     } catch (e) {
-      throw new Failure("Failed to compile new version of script: " + e);
+      var failure =
+          new Failure("Failed to compile new version of script: " + e);
+      if (e instanceof SyntaxError) {
+        var details = {
+          type: "liveedit_compile_error",
+          syntaxErrorMessage: e.message
+        };
+        CopyErrorPositionToDetails(e, details);
+        failure.details = details;
+      }
+      throw failure;
     }
     var root_new_node = BuildCodeInfoTree(new_compile_info);
 
@@ -978,6 +988,31 @@ Debug.LiveEdit = new function() {
     return "LiveEdit Failure: " + this.message;
   };
 
+  function CopyErrorPositionToDetails(e, details) {
+    function createPositionStruct(script, position) {
+      if (position == -1) return;
+      var location = script.locationFromPosition(position, true);
+      if (location == null) return;
+      return {
+        line: location.line + 1,
+        column: location.column + 1,
+        position: position
+      };
+    }
+
+    if (!("scriptObject" in e) || !("startPosition" in e)) {
+      return;
+    }
+
+    var script = e.scriptObject;
+
+    var position_struct = {
+      start: createPositionStruct(script, e.startPosition),
+      end: createPositionStruct(script, e.endPosition)
+    };
+    details.position = position_struct;
+  }
+
   // A testing entry.
   function GetPcFromSourcePos(func, source_pos) {
     return %GetFunctionCodePositionFromSource(func, source_pos);
diff --git a/deps/v8/src/liveedit.cc b/deps/v8/src/liveedit.cc
index f35315438d..f491e37204 100644
--- a/deps/v8/src/liveedit.cc
+++ b/deps/v8/src/liveedit.cc
@@ -36,6 +36,7 @@
 #include "debug.h"
 #include "deoptimizer.h"
 #include "global-handles.h"
+#include "messages.h"
 #include "parser.h"
 #include "scopeinfo.h"
 #include "scopes.h"
@@ -635,6 +636,21 @@ static Handle<JSValue> WrapInJSValue(Handle<Object> object) {
 }
 
 
+static Handle<SharedFunctionInfo> UnwrapSharedFunctionInfoFromJSValue(
+    Handle<JSValue> jsValue) {
+  Object* shared = jsValue->value();
+  CHECK(shared->IsSharedFunctionInfo());
+  return Handle<SharedFunctionInfo>(SharedFunctionInfo::cast(shared));
+}
+
+
+static int GetArrayLength(Handle<JSArray> array) {
+  Object* length = array->length();
+  CHECK(length->IsSmi());
+  return Smi::cast(length)->value();
+}
+
+
 // Simple helper class that creates more or less typed structures over
 // JSArray object. This is an adhoc method of passing structures from C++
 // to JavaScript.
@@ -688,12 +704,14 @@ class FunctionInfoWrapper : public JSArrayBasedStruct<FunctionInfoWrapper> {
       : JSArrayBasedStruct<FunctionInfoWrapper>(array) {
   }
   void SetInitialProperties(Handle<String> name, int start_position,
-                            int end_position, int param_num, int parent_index) {
+                            int end_position, int param_num,
+                            int literal_count, int parent_index) {
     HandleScope scope;
     this->SetField(kFunctionNameOffset_, name);
     this->SetSmiValueField(kStartPositionOffset_, start_position);
     this->SetSmiValueField(kEndPositionOffset_, end_position);
     this->SetSmiValueField(kParamNumOffset_, param_num);
+    this->SetSmiValueField(kLiteralNumOffset_, literal_count);
     this->SetSmiValueField(kParentIndexOffset_, parent_index);
   }
   void SetFunctionCode(Handle<Code> function_code,
@@ -711,6 +729,9 @@ class FunctionInfoWrapper : public JSArrayBasedStruct<FunctionInfoWrapper> {
     Handle<JSValue> info_holder = WrapInJSValue(info);
     this->SetField(kSharedFunctionInfoOffset_, info_holder);
   }
+  int GetLiteralCount() {
+    return this->GetSmiValueField(kLiteralNumOffset_);
+  }
   int GetParentIndex() {
     return this->GetSmiValueField(kParentIndexOffset_);
   }
@@ -744,7 +765,8 @@ class FunctionInfoWrapper : public JSArrayBasedStruct<FunctionInfoWrapper> {
   static const int kOuterScopeInfoOffset_ = 6;
   static const int kParentIndexOffset_ = 7;
   static const int kSharedFunctionInfoOffset_ = 8;
-  static const int kSize_ = 9;
+  static const int kLiteralNumOffset_ = 9;
+  static const int kSize_ = 10;
 
   friend class JSArrayBasedStruct<FunctionInfoWrapper>;
 };
@@ -777,9 +799,7 @@ class SharedInfoWrapper : public JSArrayBasedStruct<SharedInfoWrapper> {
     Object* element = this->GetField(kSharedInfoOffset_);
     CHECK(element->IsJSValue());
     Handle<JSValue> value_wrapper(JSValue::cast(element));
-    Handle<Object> raw_result = UnwrapJSValue(value_wrapper);
-    CHECK(raw_result->IsSharedFunctionInfo());
-    return Handle<SharedFunctionInfo>::cast(raw_result);
+    return UnwrapSharedFunctionInfoFromJSValue(value_wrapper);
   }
 
  private:
@@ -806,6 +826,7 @@ class FunctionInfoListener {
     FunctionInfoWrapper info = FunctionInfoWrapper::Create();
     info.SetInitialProperties(fun->name(), fun->start_position(),
                               fun->end_position(), fun->parameter_count(),
+                              fun->materialized_literal_count(),
                               current_parent_index_);
     current_parent_index_ = len_;
     SetElementNonStrict(result_, len_, info.GetJSArray());
@@ -905,17 +926,65 @@ JSArray* LiveEdit::GatherCompileInfo(Handle<Script> script,
   Handle<Object> original_source = Handle<Object>(script->source());
   script->set_source(*source);
   isolate->set_active_function_info_listener(&listener);
-  CompileScriptForTracker(isolate, script);
+
+  {
+    // Creating verbose TryCatch from public API is currently the only way to
+    // force code save location. We do not use this the object directly.
+    v8::TryCatch try_catch;
+    try_catch.SetVerbose(true);
+
+    // A logical 'try' section.
+    CompileScriptForTracker(isolate, script);
+  }
+
+  // A logical 'catch' section.
+  Handle<JSObject> rethrow_exception;
+  if (isolate->has_pending_exception()) {
+    Handle<Object> exception(isolate->pending_exception()->ToObjectChecked());
+    MessageLocation message_location = isolate->GetMessageLocation();
+
+    isolate->clear_pending_message();
+    isolate->clear_pending_exception();
+
+    // If possible, copy positions from message object to exception object.
+    if (exception->IsJSObject() && !message_location.script().is_null()) {
+      rethrow_exception = Handle<JSObject>::cast(exception);
+
+      Factory* factory = isolate->factory();
+      Handle<String> start_pos_key =
+          factory->LookupAsciiSymbol("startPosition");
+      Handle<String> end_pos_key =
+          factory->LookupAsciiSymbol("endPosition");
+      Handle<String> script_obj_key =
+          factory->LookupAsciiSymbol("scriptObject");
+      Handle<Smi> start_pos(Smi::FromInt(message_location.start_pos()));
+      Handle<Smi> end_pos(Smi::FromInt(message_location.end_pos()));
+      Handle<JSValue> script_obj = GetScriptWrapper(message_location.script());
+      JSReceiver::SetProperty(
+          rethrow_exception, start_pos_key, start_pos, NONE, kNonStrictMode);
+      JSReceiver::SetProperty(
+          rethrow_exception, end_pos_key, end_pos, NONE, kNonStrictMode);
+      JSReceiver::SetProperty(
+          rethrow_exception, script_obj_key, script_obj, NONE, kNonStrictMode);
+    }
+  }
+
+  // A logical 'finally' section.
   isolate->set_active_function_info_listener(NULL);
   script->set_source(*original_source);
 
-  return *(listener.GetResult());
+  if (rethrow_exception.is_null()) {
+    return *(listener.GetResult());
+  } else {
+    isolate->Throw(*rethrow_exception);
+    return 0;
+  }
 }
 
 
 void LiveEdit::WrapSharedFunctionInfos(Handle<JSArray> array) {
   HandleScope scope;
-  int len = Smi::cast(array->length())->value();
+  int len = GetArrayLength(array);
   for (int i = 0; i < len; i++) {
     Handle<SharedFunctionInfo> info(
         SharedFunctionInfo::cast(array->GetElementNoExceptionThrown(i)));
@@ -1001,6 +1070,129 @@ static void ReplaceCodeObject(Handle<Code> original,
 }
 
 
+// Patch function literals.
+// Name 'literals' is a misnomer. Rather it's a cache for complex object
+// boilerplates and for a native context. We must clean cached values.
+// Additionally we may need to allocate a new array if number of literals
+// changed.
+class LiteralFixer {
+ public:
+  static void PatchLiterals(FunctionInfoWrapper* compile_info_wrapper,
+                            Handle<SharedFunctionInfo> shared_info,
+                            Isolate* isolate) {
+    int new_literal_count = compile_info_wrapper->GetLiteralCount();
+    if (new_literal_count > 0) {
+      new_literal_count += JSFunction::kLiteralsPrefixSize;
+    }
+    int old_literal_count = shared_info->num_literals();
+
+    if (old_literal_count == new_literal_count) {
+      // If literal count didn't change, simply go over all functions
+      // and clear literal arrays.
+      ClearValuesVisitor visitor;
+      IterateJSFunctions(*shared_info, &visitor);
+    } else {
+      // When literal count changes, we have to create new array instances.
+      // Since we cannot create instances when iterating heap, we should first
+      // collect all functions and fix their literal arrays.
+      Handle<FixedArray> function_instances =
+          CollectJSFunctions(shared_info, isolate);
+      for (int i = 0; i < function_instances->length(); i++) {
+        Handle<JSFunction> fun(JSFunction::cast(function_instances->get(i)));
+        Handle<FixedArray> old_literals(fun->literals());
+        Handle<FixedArray> new_literals =
+            isolate->factory()->NewFixedArray(new_literal_count);
+        if (new_literal_count > 0) {
+          Handle<Context> native_context;
+          if (old_literals->length() >
+              JSFunction::kLiteralNativeContextIndex) {
+            native_context = Handle<Context>(
+                JSFunction::NativeContextFromLiterals(fun->literals()));
+          } else {
+            native_context = Handle<Context>(fun->context()->native_context());
+          }
+          new_literals->set(JSFunction::kLiteralNativeContextIndex,
+              *native_context);
+        }
+        fun->set_literals(*new_literals);
+      }
+
+      shared_info->set_num_literals(new_literal_count);
+    }
+  }
+
+ private:
+  // Iterates all function instances in the HEAP that refers to the
+  // provided shared_info.
+  template<typename Visitor>
+  static void IterateJSFunctions(SharedFunctionInfo* shared_info,
+                                 Visitor* visitor) {
+    AssertNoAllocation no_allocations_please;
+
+    HeapIterator iterator;
+    for (HeapObject* obj = iterator.next(); obj != NULL;
+        obj = iterator.next()) {
+      if (obj->IsJSFunction()) {
+        JSFunction* function = JSFunction::cast(obj);
+        if (function->shared() == shared_info) {
+          visitor->visit(function);
+        }
+      }
+    }
+  }
+
+  // Finds all instances of JSFunction that refers to the provided shared_info
+  // and returns array with them.
+  static Handle<FixedArray> CollectJSFunctions(
+      Handle<SharedFunctionInfo> shared_info, Isolate* isolate) {
+    CountVisitor count_visitor;
+    count_visitor.count = 0;
+    IterateJSFunctions(*shared_info, &count_visitor);
+    int size = count_visitor.count;
+
+    Handle<FixedArray> result = isolate->factory()->NewFixedArray(size);
+    if (size > 0) {
+      CollectVisitor collect_visitor(result);
+      IterateJSFunctions(*shared_info, &collect_visitor);
+    }
+    return result;
+  }
+
+  class ClearValuesVisitor {
+   public:
+    void visit(JSFunction* fun) {
+      FixedArray* literals = fun->literals();
+      int len = literals->length();
+      for (int j = JSFunction::kLiteralsPrefixSize; j < len; j++) {
+        literals->set_undefined(j);
+      }
+    }
+  };
+
+  class CountVisitor {
+   public:
+    void visit(JSFunction* fun) {
+      count++;
+    }
+    int count;
+  };
+
+  class CollectVisitor {
+   public:
+    explicit CollectVisitor(Handle<FixedArray> output)
+        : m_output(output), m_pos(0) {}
+
+    void visit(JSFunction* fun) {
+      m_output->set(m_pos, fun);
+      m_pos++;
+    }
+   private:
+    Handle<FixedArray> m_output;
+    int m_pos;
+  };
+};
+
+
 // Check whether the code is natural function code (not a lazy-compile stub
 // code).
 static bool IsJSFunctionCode(Code* code) {
@@ -1067,9 +1259,10 @@ MaybeObject* LiveEdit::ReplaceFunctionCode(
     Handle<JSArray> new_compile_info_array,
     Handle<JSArray> shared_info_array) {
   HandleScope scope;
+  Isolate* isolate = Isolate::Current();
 
   if (!SharedInfoWrapper::IsInstance(shared_info_array)) {
-    return Isolate::Current()->ThrowIllegalOperation();
+    return isolate->ThrowIllegalOperation();
   }
 
   FunctionInfoWrapper compile_info_wrapper(new_compile_info_array);
@@ -1100,6 +1293,8 @@ MaybeObject* LiveEdit::ReplaceFunctionCode(
   shared_info->set_start_position(start_position);
   shared_info->set_end_position(end_position);
 
+  LiteralFixer::PatchLiterals(&compile_info_wrapper, shared_info, isolate);
+
   shared_info->set_construct_stub(
       Isolate::Current()->builtins()->builtin(
           Builtins::kJSConstructStubGeneric));
@@ -1132,7 +1327,7 @@ MaybeObject* LiveEdit::FunctionSourceUpdated(
 void LiveEdit::SetFunctionScript(Handle<JSValue> function_wrapper,
                                  Handle<Object> script_handle) {
   Handle<SharedFunctionInfo> shared_info =
-      Handle<SharedFunctionInfo>::cast(UnwrapJSValue(function_wrapper));
+      UnwrapSharedFunctionInfoFromJSValue(function_wrapper);
   CHECK(script_handle->IsScript() || script_handle->IsUndefined());
   shared_info->set_script(*script_handle);
 
@@ -1152,19 +1347,22 @@ void LiveEdit::SetFunctionScript(Handle<JSValue> function_wrapper,
 static int TranslatePosition(int original_position,
                              Handle<JSArray> position_change_array) {
   int position_diff = 0;
-  int array_len = Smi::cast(position_change_array->length())->value();
+  int array_len = GetArrayLength(position_change_array);
   // TODO(635): binary search may be used here
   for (int i = 0; i < array_len; i += 3) {
     Object* element = position_change_array->GetElementNoExceptionThrown(i);
+    CHECK(element->IsSmi());
     int chunk_start = Smi::cast(element)->value();
     if (original_position < chunk_start) {
       break;
     }
     element = position_change_array->GetElementNoExceptionThrown(i + 1);
+    CHECK(element->IsSmi());
     int chunk_end = Smi::cast(element)->value();
     // Position mustn't be inside a chunk.
     ASSERT(original_position >= chunk_end);
     element = position_change_array->GetElementNoExceptionThrown(i + 2);
+    CHECK(element->IsSmi());
     int chunk_changed_end = Smi::cast(element)->value();
     position_diff = chunk_changed_end - chunk_end;
   }
@@ -1271,7 +1469,9 @@ static Handle<Code> PatchPositionsInCode(
           continue;
         }
       }
-      buffer_writer.Write(it.rinfo());
+      if (RelocInfo::IsRealRelocMode(rinfo->rmode())) {
+        buffer_writer.Write(it.rinfo());
+      }
     }
   }
 
@@ -1293,7 +1493,6 @@ static Handle<Code> PatchPositionsInCode(
 
 MaybeObject* LiveEdit::PatchFunctionPositions(
     Handle<JSArray> shared_info_array, Handle<JSArray> position_change_array) {
-
   if (!SharedInfoWrapper::IsInstance(shared_info_array)) {
     return Isolate::Current()->ThrowIllegalOperation();
   }
@@ -1383,11 +1582,11 @@ void LiveEdit::ReplaceRefToNestedFunction(
     Handle<JSValue> subst_function_wrapper) {
 
   Handle<SharedFunctionInfo> parent_shared =
-      Handle<SharedFunctionInfo>::cast(UnwrapJSValue(parent_function_wrapper));
+      UnwrapSharedFunctionInfoFromJSValue(parent_function_wrapper);
   Handle<SharedFunctionInfo> orig_shared =
-      Handle<SharedFunctionInfo>::cast(UnwrapJSValue(orig_function_wrapper));
+      UnwrapSharedFunctionInfoFromJSValue(orig_function_wrapper);
   Handle<SharedFunctionInfo> subst_shared =
-      Handle<SharedFunctionInfo>::cast(UnwrapJSValue(subst_function_wrapper));
+      UnwrapSharedFunctionInfoFromJSValue(subst_function_wrapper);
 
   for (RelocIterator it(parent_shared->code()); !it.done(); it.next()) {
     if (it.rinfo()->rmode() == RelocInfo::EMBEDDED_OBJECT) {
@@ -1410,12 +1609,13 @@ static bool CheckActivation(Handle<JSArray> shared_info_array,
   Handle<JSFunction> function(
       JSFunction::cast(JavaScriptFrame::cast(frame)->function()));
 
-  int len = Smi::cast(shared_info_array->length())->value();
+  int len = GetArrayLength(shared_info_array);
   for (int i = 0; i < len; i++) {
-    JSValue* wrapper =
-        JSValue::cast(shared_info_array->GetElementNoExceptionThrown(i));
-    Handle<SharedFunctionInfo> shared(
-        SharedFunctionInfo::cast(wrapper->value()));
+    Object* element = shared_info_array->GetElementNoExceptionThrown(i);
+    CHECK(element->IsJSValue());
+    Handle<JSValue> jsvalue(JSValue::cast(element));
+    Handle<SharedFunctionInfo> shared =
+        UnwrapSharedFunctionInfoFromJSValue(jsvalue);
 
     if (function->shared() == *shared || IsInlined(*function, *shared)) {
       SetElementNonStrict(result, i, Handle<Smi>(Smi::FromInt(status)));
@@ -1723,7 +1923,7 @@ static const char* DropActivationsInActiveThread(
     return message;
   }
 
-  int array_len = Smi::cast(shared_info_array->length())->value();
+  int array_len = GetArrayLength(shared_info_array);
 
   // Replace "blocked on active" with "replaced on active" status.
   for (int i = 0; i < array_len; i++) {
@@ -1765,7 +1965,7 @@ class InactiveThreadActivationsChecker : public ThreadVisitor {
 
 Handle<JSArray> LiveEdit::CheckAndDropActivations(
     Handle<JSArray> shared_info_array, bool do_drop, Zone* zone) {
-  int len = Smi::cast(shared_info_array->length())->value();
+  int len = GetArrayLength(shared_info_array);
 
   Handle<JSArray> result = FACTORY->NewJSArray(len);
 
diff --git a/deps/v8/src/liveobjectlist.cc b/deps/v8/src/liveobjectlist.cc
index 6b89cf6839..6dbe0a86e7 100644
--- a/deps/v8/src/liveobjectlist.cc
+++ b/deps/v8/src/liveobjectlist.cc
@@ -71,7 +71,7 @@ typedef int (*RawComparer)(const void*, const void*);
   v(ExternalAsciiString, "unexpected: ExternalAsciiString") \
   v(ExternalString, "unexpected: ExternalString") \
   v(SeqTwoByteString, "unexpected: SeqTwoByteString") \
-  v(SeqAsciiString, "unexpected: SeqAsciiString") \
+  v(SeqOneByteString, "unexpected: SeqOneByteString") \
   v(SeqString, "unexpected: SeqString") \
   v(JSFunctionResultCache, "unexpected: JSFunctionResultCache") \
   v(NativeContext, "unexpected: NativeContext") \
diff --git a/deps/v8/src/log-utils.cc b/deps/v8/src/log-utils.cc
index 7bd7baa2d8..d8d92cbe21 100644
--- a/deps/v8/src/log-utils.cc
+++ b/deps/v8/src/log-utils.cc
@@ -67,6 +67,7 @@ void Log::Initialize() {
     FLAG_log_suspect = true;
     FLAG_log_handles = true;
     FLAG_log_regexp = true;
+    FLAG_log_internal_timer_events = true;
   }
 
   // --prof implies --log-code.
@@ -80,7 +81,8 @@ void Log::Initialize() {
 
   bool open_log_file = FLAG_log || FLAG_log_runtime || FLAG_log_api
       || FLAG_log_code || FLAG_log_gc || FLAG_log_handles || FLAG_log_suspect
-      || FLAG_log_regexp || FLAG_log_state_changes || FLAG_ll_prof;
+      || FLAG_log_regexp || FLAG_log_state_changes || FLAG_ll_prof
+      || FLAG_log_internal_timer_events;
 
   // If we're logging anything, we need to open the log file.
   if (open_log_file) {
@@ -257,7 +259,7 @@ void LogMessageBuilder::AppendDetailed(String* str, bool show_impl_info) {
   if (len > 0x1000)
     len = 0x1000;
   if (show_impl_info) {
-    Append(str->IsAsciiRepresentation() ? 'a' : '2');
+    Append(str->IsOneByteRepresentation() ? 'a' : '2');
     if (StringShape(str).IsExternal())
       Append('e');
     if (StringShape(str).IsSymbol())
diff --git a/deps/v8/src/log.cc b/deps/v8/src/log.cc
index b049ffe4eb..d0dc76d4b8 100644
--- a/deps/v8/src/log.cc
+++ b/deps/v8/src/log.cc
@@ -44,37 +44,6 @@
 namespace v8 {
 namespace internal {
 
-//
-// Sliding state window.  Updates counters to keep track of the last
-// window of kBufferSize states.  This is useful to track where we
-// spent our time.
-//
-class SlidingStateWindow {
- public:
-  explicit SlidingStateWindow(Isolate* isolate);
-  ~SlidingStateWindow();
-  void AddState(StateTag state);
-
- private:
-  static const int kBufferSize = 256;
-  Counters* counters_;
-  int current_index_;
-  bool is_full_;
-  byte buffer_[kBufferSize];
-
-
-  void IncrementStateCounter(StateTag state) {
-    counters_->state_counters(state)->Increment();
-  }
-
-
-  void DecrementStateCounter(StateTag state) {
-    counters_->state_counters(state)->Decrement();
-  }
-};
-
-
-//
 // The Profiler samples pc and sp values for the main thread.
 // Each sample is appended to a circular buffer.
 // An independent thread removes data and writes it to the log.
@@ -189,24 +158,12 @@ class Ticker: public Sampler {
  public:
   Ticker(Isolate* isolate, int interval):
       Sampler(isolate, interval),
-      window_(NULL),
       profiler_(NULL) {}
 
   ~Ticker() { if (IsActive()) Stop(); }
 
   virtual void Tick(TickSample* sample) {
     if (profiler_) profiler_->Insert(sample);
-    if (window_) window_->AddState(sample->state);
-  }
-
-  void SetWindow(SlidingStateWindow* window) {
-    window_ = window;
-    if (!IsActive()) Start();
-  }
-
-  void ClearWindow() {
-    window_ = NULL;
-    if (!profiler_ && IsActive() && !RuntimeProfiler::IsEnabled()) Stop();
   }
 
   void SetProfiler(Profiler* profiler) {
@@ -219,7 +176,7 @@ class Ticker: public Sampler {
   void ClearProfiler() {
     DecreaseProfilingDepth();
     profiler_ = NULL;
-    if (!window_ && IsActive() && !RuntimeProfiler::IsEnabled()) Stop();
+    if (IsActive()) Stop();
   }
 
  protected:
@@ -228,42 +185,11 @@ class Ticker: public Sampler {
   }
 
  private:
-  SlidingStateWindow* window_;
   Profiler* profiler_;
 };
 
 
 //
-// SlidingStateWindow implementation.
-//
-SlidingStateWindow::SlidingStateWindow(Isolate* isolate)
-    : counters_(isolate->counters()), current_index_(0), is_full_(false) {
-  for (int i = 0; i < kBufferSize; i++) {
-    buffer_[i] = static_cast<byte>(OTHER);
-  }
-  isolate->logger()->ticker_->SetWindow(this);
-}
-
-
-SlidingStateWindow::~SlidingStateWindow() {
-  LOGGER->ticker_->ClearWindow();
-}
-
-
-void SlidingStateWindow::AddState(StateTag state) {
-  if (is_full_) {
-    DecrementStateCounter(static_cast<StateTag>(buffer_[current_index_]));
-  } else if (current_index_ == kBufferSize - 1) {
-    is_full_ = true;
-  }
-  buffer_[current_index_] = static_cast<byte>(state);
-  IncrementStateCounter(state);
-  ASSERT(IsPowerOf2(kBufferSize));
-  current_index_ = (current_index_ + 1) & (kBufferSize - 1);
-}
-
-
-//
 // Profiler implementation.
 //
 Profiler::Profiler(Isolate* isolate)
@@ -518,7 +444,6 @@ class Logger::NameBuffer {
 Logger::Logger()
   : ticker_(NULL),
     profiler_(NULL),
-    sliding_state_window_(NULL),
     log_events_(NULL),
     logging_nesting_(0),
     cpu_profiler_nesting_(0),
@@ -531,7 +456,8 @@ Logger::Logger()
     prev_sp_(NULL),
     prev_function_(NULL),
     prev_to_(NULL),
-    prev_code_(NULL) {
+    prev_code_(NULL),
+    epoch_(0) {
 }
 
 
@@ -704,6 +630,58 @@ void Logger::SharedLibraryEvent(const wchar_t* library_path,
 }
 
 
+void Logger::TimerEvent(const char* name, int64_t start, int64_t end) {
+  if (!log_->IsEnabled()) return;
+  ASSERT(FLAG_log_internal_timer_events);
+  LogMessageBuilder msg(this);
+  int since_epoch = static_cast<int>(start - epoch_);
+  int pause_time = static_cast<int>(end - start);
+  msg.Append("timer-event,\"%s\",%ld,%ld\n", name, since_epoch, pause_time);
+  msg.WriteToLogFile();
+}
+
+
+void Logger::ExternalSwitch(StateTag old_tag, StateTag new_tag) {
+  if (old_tag != EXTERNAL && new_tag == EXTERNAL) {
+    enter_external_ = OS::Ticks();
+  }
+  if (old_tag == EXTERNAL && new_tag != EXTERNAL && enter_external_ != 0) {
+    TimerEvent("V8.External", enter_external_, OS::Ticks());
+    enter_external_ = 0;
+  }
+}
+
+
+void Logger::EnterExternal() {
+  LOGGER->enter_external_ = OS::Ticks();
+}
+
+
+void Logger::LeaveExternal() {
+  if (enter_external_ == 0) return;
+  Logger* logger = LOGGER;
+  logger->TimerEvent("V8.External", enter_external_, OS::Ticks());
+  logger->enter_external_ = 0;
+}
+
+
+int64_t Logger::enter_external_ = 0;
+
+
+void Logger::TimerEventScope::LogTimerEvent() {
+  LOG(isolate_, TimerEvent(name_, start_, OS::Ticks()));
+}
+
+
+const char* Logger::TimerEventScope::v8_recompile_synchronous =
+    "V8.RecompileSynchronous";
+const char* Logger::TimerEventScope::v8_recompile_parallel =
+    "V8.RecompileParallel";
+const char* Logger::TimerEventScope::v8_compile_full_code =
+    "V8.CompileFullCode";
+const char* Logger::TimerEventScope::v8_execute = "V8.Execute";
+
+
 void Logger::LogRegExpSource(Handle<JSRegExp> regexp) {
   // Prints "/" + re.source + "/" +
   //      (re.global?"g":"") + (re.ignorecase?"i":"") + (re.multiline?"m":"")
@@ -874,7 +852,7 @@ void Logger::CallbackEventInternal(const char* prefix, const char* name,
                                    Address entry_point) {
   if (!log_->IsEnabled() || !FLAG_log_code) return;
   LogMessageBuilder msg(this);
-  msg.Append("%s,%s,",
+  msg.Append("%s,%s,-3,",
              kLogEventsNames[CODE_CREATION_EVENT],
              kLogEventsNames[CALLBACK_TAG]);
   msg.AppendAddress(entry_point);
@@ -930,9 +908,10 @@ void Logger::CodeCreateEvent(LogEventsAndTags tag,
   }
   if (!FLAG_log_code) return;
   LogMessageBuilder msg(this);
-  msg.Append("%s,%s,",
+  msg.Append("%s,%s,%d,",
              kLogEventsNames[CODE_CREATION_EVENT],
-             kLogEventsNames[tag]);
+             kLogEventsNames[tag],
+             code->kind());
   msg.AppendAddress(code->address());
   msg.Append(",%d,\"", code->ExecutableSize());
   for (const char* p = comment; *p != '\0'; p++) {
@@ -969,9 +948,10 @@ void Logger::CodeCreateEvent(LogEventsAndTags tag,
   }
   if (!FLAG_log_code) return;
   LogMessageBuilder msg(this);
-  msg.Append("%s,%s,",
+  msg.Append("%s,%s,%d,",
              kLogEventsNames[CODE_CREATION_EVENT],
-             kLogEventsNames[tag]);
+             kLogEventsNames[tag],
+             code->kind());
   msg.AppendAddress(code->address());
   msg.Append(",%d,\"", code->ExecutableSize());
   msg.AppendDetailed(name, false);
@@ -1021,9 +1001,10 @@ void Logger::CodeCreateEvent(LogEventsAndTags tag,
   LogMessageBuilder msg(this);
   SmartArrayPointer<char> str =
       name->ToCString(DISALLOW_NULLS, ROBUST_STRING_TRAVERSAL);
-  msg.Append("%s,%s,",
+  msg.Append("%s,%s,%d,",
              kLogEventsNames[CODE_CREATION_EVENT],
-             kLogEventsNames[tag]);
+             kLogEventsNames[tag],
+             code->kind());
   msg.AppendAddress(code->address());
   msg.Append(",%d,\"%s\",", code->ExecutableSize(), *str);
   msg.AppendAddress(shared->address());
@@ -1068,9 +1049,10 @@ void Logger::CodeCreateEvent(LogEventsAndTags tag,
       shared->DebugName()->ToCString(DISALLOW_NULLS, ROBUST_STRING_TRAVERSAL);
   SmartArrayPointer<char> sourcestr =
       source->ToCString(DISALLOW_NULLS, ROBUST_STRING_TRAVERSAL);
-  msg.Append("%s,%s,",
+  msg.Append("%s,%s,%d,",
              kLogEventsNames[CODE_CREATION_EVENT],
-             kLogEventsNames[tag]);
+             kLogEventsNames[tag],
+             code->kind());
   msg.AppendAddress(code->address());
   msg.Append(",%d,\"%s %s:%d\",",
              code->ExecutableSize(),
@@ -1104,9 +1086,10 @@ void Logger::CodeCreateEvent(LogEventsAndTags tag, Code* code, int args_count) {
   }
   if (!FLAG_log_code) return;
   LogMessageBuilder msg(this);
-  msg.Append("%s,%s,",
+  msg.Append("%s,%s,%d,",
              kLogEventsNames[CODE_CREATION_EVENT],
-             kLogEventsNames[tag]);
+             kLogEventsNames[tag],
+             code->kind());
   msg.AppendAddress(code->address());
   msg.Append(",%d,\"args_count: %d\"", code->ExecutableSize(), args_count);
   msg.Append('\n');
@@ -1141,7 +1124,7 @@ void Logger::RegExpCodeCreateEvent(Code* code, String* source) {
   }
   if (!FLAG_log_code) return;
   LogMessageBuilder msg(this);
-  msg.Append("%s,%s,",
+  msg.Append("%s,%s,-2,",
              kLogEventsNames[CODE_CREATION_EVENT],
              kLogEventsNames[REG_EXP_TAG]);
   msg.AppendAddress(code->address());
@@ -1321,6 +1304,7 @@ void Logger::TickEvent(TickSample* sample, bool overflow) {
   msg.AppendAddress(sample->pc);
   msg.Append(',');
   msg.AppendAddress(sample->sp);
+  msg.Append(",%ld", static_cast<int>(OS::Ticks() - epoch_));
   if (sample->has_external_callback) {
     msg.Append(",1,");
     msg.AppendAddress(sample->external_callback);
@@ -1353,9 +1337,7 @@ void Logger::PauseProfiler() {
     if (--cpu_profiler_nesting_ == 0) {
       profiler_->pause();
       if (FLAG_prof_lazy) {
-        if (!FLAG_sliding_state_window && !RuntimeProfiler::IsEnabled()) {
-          ticker_->Stop();
-        }
+        ticker_->Stop();
         FLAG_log_code = false;
         LOG(ISOLATE, UncheckedStringEvent("profiler", "pause"));
       }
@@ -1376,9 +1358,7 @@ void Logger::ResumeProfiler() {
         FLAG_log_code = true;
         LogCompiledFunctions();
         LogAccessorCallbacks();
-        if (!FLAG_sliding_state_window && !ticker_->IsActive()) {
-          ticker_->Start();
-        }
+        if (!ticker_->IsActive()) ticker_->Start();
       }
       profiler_->resume();
     }
@@ -1721,13 +1701,10 @@ bool Logger::SetUp() {
   Isolate* isolate = Isolate::Current();
   ticker_ = new Ticker(isolate, kSamplingIntervalMs);
 
-  if (FLAG_sliding_state_window && sliding_state_window_ == NULL) {
-    sliding_state_window_ = new SlidingStateWindow(isolate);
-  }
-
   bool start_logging = FLAG_log || FLAG_log_runtime || FLAG_log_api
     || FLAG_log_code || FLAG_log_gc || FLAG_log_handles || FLAG_log_suspect
-    || FLAG_log_regexp || FLAG_log_state_changes || FLAG_ll_prof;
+    || FLAG_log_regexp || FLAG_log_state_changes || FLAG_ll_prof
+    || FLAG_log_internal_timer_events;
 
   if (start_logging) {
     logging_nesting_ = 1;
@@ -1745,6 +1722,8 @@ bool Logger::SetUp() {
     }
   }
 
+  if (FLAG_log_internal_timer_events || FLAG_prof) epoch_ = OS::Ticks();
+
   return true;
 }
 
@@ -1788,9 +1767,6 @@ FILE* Logger::TearDown() {
     profiler_ = NULL;
   }
 
-  delete sliding_state_window_;
-  sliding_state_window_ = NULL;
-
   delete ticker_;
   ticker_ = NULL;
 
@@ -1798,22 +1774,6 @@ FILE* Logger::TearDown() {
 }
 
 
-void Logger::EnableSlidingStateWindow() {
-  // If the ticker is NULL, Logger::SetUp has not been called yet.  In
-  // that case, we set the sliding_state_window flag so that the
-  // sliding window computation will be started when Logger::SetUp is
-  // called.
-  if (ticker_ == NULL) {
-    FLAG_sliding_state_window = true;
-    return;
-  }
-  // Otherwise, if the sliding state window computation has not been
-  // started we do it now.
-  if (sliding_state_window_ == NULL) {
-    sliding_state_window_ = new SlidingStateWindow(Isolate::Current());
-  }
-}
-
 // Protects the state below.
 static Mutex* active_samplers_mutex = NULL;
 
diff --git a/deps/v8/src/log.h b/deps/v8/src/log.h
index 33f359a7f9..eced6050a5 100644
--- a/deps/v8/src/log.h
+++ b/deps/v8/src/log.h
@@ -74,8 +74,8 @@ namespace internal {
 class LogMessageBuilder;
 class Profiler;
 class Semaphore;
-class SlidingStateWindow;
 class Ticker;
+class Isolate;
 
 #undef LOG
 #define LOG(isolate, Call)                          \
@@ -174,9 +174,6 @@ class Logger {
   // leaving the file open.
   FILE* TearDown();
 
-  // Enable the computation of a sliding window of states.
-  void EnableSlidingStateWindow();
-
   // Emits an event with a string value -> (name, value).
   void StringEvent(const char* name, const char* value);
 
@@ -275,6 +272,37 @@ class Logger {
                           uintptr_t start,
                           uintptr_t end);
 
+  // ==== Events logged by --log-timer-events. ====
+  void TimerEvent(const char* name, int64_t start, int64_t end);
+  void ExternalSwitch(StateTag old_tag, StateTag new_tag);
+
+  static void EnterExternal();
+  static void LeaveExternal();
+
+  class TimerEventScope {
+   public:
+    TimerEventScope(Isolate* isolate, const char* name)
+        : isolate_(isolate), name_(name), start_(0) {
+      if (FLAG_log_internal_timer_events) start_ = OS::Ticks();
+    }
+
+    ~TimerEventScope() {
+      if (FLAG_log_internal_timer_events) LogTimerEvent();
+    }
+
+    void LogTimerEvent();
+
+    static const char* v8_recompile_synchronous;
+    static const char* v8_recompile_parallel;
+    static const char* v8_compile_full_code;
+    static const char* v8_execute;
+
+   private:
+    Isolate* isolate_;
+    const char* name_;
+    int64_t start_;
+  };
+
   // ==== Events logged by --log-regexp ====
   // Regexp compilation and execution events.
 
@@ -401,10 +429,6 @@ class Logger {
   // of samples.
   Profiler* profiler_;
 
-  // SlidingStateWindow instance keeping a sliding window of the most
-  // recent VM states.
-  SlidingStateWindow* sliding_state_window_;
-
   // An array of log events names.
   const char* const* log_events_;
 
@@ -415,7 +439,6 @@ class Logger {
   friend class LogMessageBuilder;
   friend class TimeLog;
   friend class Profiler;
-  friend class SlidingStateWindow;
   friend class StackTracer;
   friend class VMState;
 
@@ -449,6 +472,9 @@ class Logger {
   //  Logger::FunctionCreateEvent(...)
   Address prev_code_;
 
+  int64_t epoch_;
+  static int64_t enter_external_;
+
   friend class CpuProfiler;
 };
 
diff --git a/deps/v8/src/macros.py b/deps/v8/src/macros.py
index 08fa82e686..f871fc55c7 100644
--- a/deps/v8/src/macros.py
+++ b/deps/v8/src/macros.py
@@ -32,6 +32,8 @@ const NONE        = 0;
 const READ_ONLY   = 1;
 const DONT_ENUM   = 2;
 const DONT_DELETE = 4;
+const NEW_ONE_BYTE_STRING = true;
+const NEW_TWO_BYTE_STRING = false;
 
 # Constants used for getter and setter operations.
 const GETTER = 0;
diff --git a/deps/v8/src/mark-compact-inl.h b/deps/v8/src/mark-compact-inl.h
index 2f7e31fea5..10773e7202 100644
--- a/deps/v8/src/mark-compact-inl.h
+++ b/deps/v8/src/mark-compact-inl.h
@@ -52,32 +52,15 @@ void MarkCompactCollector::SetFlags(int flags) {
 }
 
 
-bool MarkCompactCollector::MarkObjectAndPush(HeapObject* obj) {
-  if (MarkObjectWithoutPush(obj)) {
-    marking_deque_.PushBlack(obj);
-    return true;
-  }
-  return false;
-}
-
-
 void MarkCompactCollector::MarkObject(HeapObject* obj, MarkBit mark_bit) {
   ASSERT(Marking::MarkBitFrom(obj) == mark_bit);
   if (!mark_bit.Get()) {
     mark_bit.Set();
     MemoryChunk::IncrementLiveBytesFromGC(obj->address(), obj->Size());
-    ProcessNewlyMarkedObject(obj);
-  }
-}
-
-
-bool MarkCompactCollector::MarkObjectWithoutPush(HeapObject* obj) {
-  MarkBit mark_bit = Marking::MarkBitFrom(obj);
-  if (!mark_bit.Get()) {
-    SetMark(obj, mark_bit);
-    return true;
+    ASSERT(IsMarked(obj));
+    ASSERT(HEAP->Contains(obj));
+    marking_deque_.PushBlack(obj);
   }
-  return false;
 }
 
 
@@ -86,9 +69,6 @@ void MarkCompactCollector::SetMark(HeapObject* obj, MarkBit mark_bit) {
   ASSERT(Marking::MarkBitFrom(obj) == mark_bit);
   mark_bit.Set();
   MemoryChunk::IncrementLiveBytesFromGC(obj->address(), obj->Size());
-  if (obj->IsMap()) {
-    heap_->ClearCacheOnMap(Map::cast(obj));
-  }
 }
 
 
diff --git a/deps/v8/src/mark-compact.cc b/deps/v8/src/mark-compact.cc
index dcce8daddf..8ca14db506 100644
--- a/deps/v8/src/mark-compact.cc
+++ b/deps/v8/src/mark-compact.cc
@@ -62,24 +62,24 @@ MarkCompactCollector::MarkCompactCollector() :  // NOLINT
       sweep_precisely_(false),
       reduce_memory_footprint_(false),
       abort_incremental_marking_(false),
+      marking_parity_(ODD_MARKING_PARITY),
       compacting_(false),
       was_marked_incrementally_(false),
       tracer_(NULL),
       migration_slots_buffer_(NULL),
       heap_(NULL),
       code_flusher_(NULL),
-      encountered_weak_maps_(NULL),
-      marker_(this, this) { }
+      encountered_weak_maps_(NULL) { }
 
 
-#ifdef DEBUG
+#ifdef VERIFY_HEAP
 class VerifyMarkingVisitor: public ObjectVisitor {
  public:
   void VisitPointers(Object** start, Object** end) {
     for (Object** current = start; current < end; current++) {
       if ((*current)->IsHeapObject()) {
         HeapObject* object = HeapObject::cast(*current);
-        ASSERT(HEAP->mark_compact_collector()->IsMarked(object));
+        CHECK(HEAP->mark_compact_collector()->IsMarked(object));
       }
     }
   }
@@ -96,7 +96,7 @@ static void VerifyMarking(Address bottom, Address top) {
        current += kPointerSize) {
     object = HeapObject::FromAddress(current);
     if (MarkCompactCollector::IsMarked(object)) {
-      ASSERT(current >= next_object_must_be_here_or_later);
+      CHECK(current >= next_object_must_be_here_or_later);
       object->Iterate(&visitor);
       next_object_must_be_here_or_later = current + object->Size();
     }
@@ -109,12 +109,12 @@ static void VerifyMarking(NewSpace* space) {
   NewSpacePageIterator it(space->bottom(), end);
   // The bottom position is at the start of its page. Allows us to use
   // page->area_start() as start of range on all pages.
-  ASSERT_EQ(space->bottom(),
+  CHECK_EQ(space->bottom(),
             NewSpacePage::FromAddress(space->bottom())->area_start());
   while (it.has_next()) {
     NewSpacePage* page = it.next();
     Address limit = it.has_next() ? page->area_end() : end;
-    ASSERT(limit == end || !page->Contains(end));
+    CHECK(limit == end || !page->Contains(end));
     VerifyMarking(page->area_start(), limit);
   }
 }
@@ -174,7 +174,7 @@ static void VerifyEvacuation(Address bottom, Address top) {
        current += kPointerSize) {
     object = HeapObject::FromAddress(current);
     if (MarkCompactCollector::IsMarked(object)) {
-      ASSERT(current >= next_object_must_be_here_or_later);
+      CHECK(current >= next_object_must_be_here_or_later);
       object->Iterate(&visitor);
       next_object_must_be_here_or_later = current + object->Size();
     }
@@ -190,7 +190,7 @@ static void VerifyEvacuation(NewSpace* space) {
     NewSpacePage* page = it.next();
     Address current = page->area_start();
     Address limit = it.has_next() ? page->area_end() : space->top();
-    ASSERT(limit == space->top() || !page->Contains(space->top()));
+    CHECK(limit == space->top() || !page->Contains(space->top()));
     while (current < limit) {
       HeapObject* object = HeapObject::FromAddress(current);
       object->Iterate(&visitor);
@@ -222,8 +222,10 @@ static void VerifyEvacuation(Heap* heap) {
   VerifyEvacuationVisitor visitor;
   heap->IterateStrongRoots(&visitor, VISIT_ALL);
 }
+#endif  // VERIFY_HEAP
 
 
+#ifdef DEBUG
 class VerifyNativeContextSeparationVisitor: public ObjectVisitor {
  public:
   VerifyNativeContextSeparationVisitor() : current_native_context_(NULL) {}
@@ -348,7 +350,9 @@ bool MarkCompactCollector::StartCompaction(CompactionMode mode) {
     CollectEvacuationCandidates(heap()->old_pointer_space());
     CollectEvacuationCandidates(heap()->old_data_space());
 
-    if (FLAG_compact_code_space && mode == NON_INCREMENTAL_COMPACTION) {
+    if (FLAG_compact_code_space &&
+        (mode == NON_INCREMENTAL_COMPACTION ||
+         FLAG_incremental_code_compaction)) {
       CollectEvacuationCandidates(heap()->code_space());
     } else if (FLAG_trace_fragmentation) {
       TraceFragmentation(heap()->code_space());
@@ -383,7 +387,7 @@ void MarkCompactCollector::CollectGarbage() {
 
   ClearWeakMaps();
 
-#ifdef DEBUG
+#ifdef VERIFY_HEAP
   if (FLAG_verify_heap) {
     VerifyMarking(heap_);
   }
@@ -401,11 +405,18 @@ void MarkCompactCollector::CollectGarbage() {
 
   Finish();
 
+  if (marking_parity_ == EVEN_MARKING_PARITY) {
+    marking_parity_ = ODD_MARKING_PARITY;
+  } else {
+    ASSERT(marking_parity_ == ODD_MARKING_PARITY);
+    marking_parity_ = EVEN_MARKING_PARITY;
+  }
+
   tracer_ = NULL;
 }
 
 
-#ifdef DEBUG
+#ifdef VERIFY_HEAP
 void MarkCompactCollector::VerifyMarkbitsAreClean(PagedSpace* space) {
   PageIterator it(space);
 
@@ -416,6 +427,7 @@ void MarkCompactCollector::VerifyMarkbitsAreClean(PagedSpace* space) {
   }
 }
 
+
 void MarkCompactCollector::VerifyMarkbitsAreClean(NewSpace* space) {
   NewSpacePageIterator it(space->bottom(), space->top());
 
@@ -426,6 +438,7 @@ void MarkCompactCollector::VerifyMarkbitsAreClean(NewSpace* space) {
   }
 }
 
+
 void MarkCompactCollector::VerifyMarkbitsAreClean() {
   VerifyMarkbitsAreClean(heap_->old_pointer_space());
   VerifyMarkbitsAreClean(heap_->old_data_space());
@@ -437,11 +450,11 @@ void MarkCompactCollector::VerifyMarkbitsAreClean() {
   LargeObjectIterator it(heap_->lo_space());
   for (HeapObject* obj = it.Next(); obj != NULL; obj = it.Next()) {
     MarkBit mark_bit = Marking::MarkBitFrom(obj);
-    ASSERT(Marking::IsWhite(mark_bit));
-    ASSERT_EQ(0, Page::FromAddress(obj->address())->LiveBytes());
+    CHECK(Marking::IsWhite(mark_bit));
+    CHECK_EQ(0, Page::FromAddress(obj->address())->LiveBytes());
   }
 }
-#endif
+#endif  // VERIFY_HEAP
 
 
 static void ClearMarkbitsInPagedSpace(PagedSpace* space) {
@@ -475,6 +488,7 @@ void MarkCompactCollector::ClearMarkbits() {
     MarkBit mark_bit = Marking::MarkBitFrom(obj);
     mark_bit.Clear();
     mark_bit.Next().Clear();
+    Page::FromAddress(obj->address())->ResetProgressBar();
     Page::FromAddress(obj->address())->ResetLiveBytes();
   }
 }
@@ -803,7 +817,7 @@ void MarkCompactCollector::Prepare(GCTracer* tracer) {
     space->PrepareForMarkCompact();
   }
 
-#ifdef DEBUG
+#ifdef VERIFY_HEAP
   if (!was_marked_incrementally_ && FLAG_verify_heap) {
     VerifyMarkbitsAreClean();
   }
@@ -854,133 +868,144 @@ void MarkCompactCollector::Finish() {
 // and continue with marking.  This process repeats until all reachable
 // objects have been marked.
 
-class CodeFlusher {
- public:
-  explicit CodeFlusher(Isolate* isolate)
-      : isolate_(isolate),
-        jsfunction_candidates_head_(NULL),
-        shared_function_info_candidates_head_(NULL) {}
+void CodeFlusher::ProcessJSFunctionCandidates() {
+  Code* lazy_compile = isolate_->builtins()->builtin(Builtins::kLazyCompile);
+  Object* undefined = isolate_->heap()->undefined_value();
 
-  void AddCandidate(SharedFunctionInfo* shared_info) {
-    SetNextCandidate(shared_info, shared_function_info_candidates_head_);
-    shared_function_info_candidates_head_ = shared_info;
-  }
+  JSFunction* candidate = jsfunction_candidates_head_;
+  JSFunction* next_candidate;
+  while (candidate != NULL) {
+    next_candidate = GetNextCandidate(candidate);
+    ClearNextCandidate(candidate, undefined);
 
-  void AddCandidate(JSFunction* function) {
-    ASSERT(function->code() == function->shared()->code());
+    SharedFunctionInfo* shared = candidate->shared();
 
-    SetNextCandidate(function, jsfunction_candidates_head_);
-    jsfunction_candidates_head_ = function;
-  }
+    Code* code = shared->code();
+    MarkBit code_mark = Marking::MarkBitFrom(code);
+    if (!code_mark.Get()) {
+      shared->set_code(lazy_compile);
+      candidate->set_code(lazy_compile);
+    } else if (code == lazy_compile) {
+      candidate->set_code(lazy_compile);
+    }
 
-  void ProcessCandidates() {
-    ProcessSharedFunctionInfoCandidates();
-    ProcessJSFunctionCandidates();
-  }
+    // We are in the middle of a GC cycle so the write barrier in the code
+    // setter did not record the slot update and we have to do that manually.
+    Address slot = candidate->address() + JSFunction::kCodeEntryOffset;
+    Code* target = Code::cast(Code::GetObjectFromEntryAddress(slot));
+    isolate_->heap()->mark_compact_collector()->
+        RecordCodeEntrySlot(slot, target);
 
- private:
-  void ProcessJSFunctionCandidates() {
-    Code* lazy_compile = isolate_->builtins()->builtin(Builtins::kLazyCompile);
+    Object** shared_code_slot =
+        HeapObject::RawField(shared, SharedFunctionInfo::kCodeOffset);
+    isolate_->heap()->mark_compact_collector()->
+        RecordSlot(shared_code_slot, shared_code_slot, *shared_code_slot);
 
-    JSFunction* candidate = jsfunction_candidates_head_;
-    JSFunction* next_candidate;
-    while (candidate != NULL) {
-      next_candidate = GetNextCandidate(candidate);
+    candidate = next_candidate;
+  }
 
-      SharedFunctionInfo* shared = candidate->shared();
+  jsfunction_candidates_head_ = NULL;
+}
 
-      Code* code = shared->code();
-      MarkBit code_mark = Marking::MarkBitFrom(code);
-      if (!code_mark.Get()) {
-        shared->set_code(lazy_compile);
-        candidate->set_code(lazy_compile);
-      } else {
-        candidate->set_code(shared->code());
-      }
 
-      // We are in the middle of a GC cycle so the write barrier in the code
-      // setter did not record the slot update and we have to do that manually.
-      Address slot = candidate->address() + JSFunction::kCodeEntryOffset;
-      Code* target = Code::cast(Code::GetObjectFromEntryAddress(slot));
-      isolate_->heap()->mark_compact_collector()->
-          RecordCodeEntrySlot(slot, target);
+void CodeFlusher::ProcessSharedFunctionInfoCandidates() {
+  Code* lazy_compile = isolate_->builtins()->builtin(Builtins::kLazyCompile);
 
-      RecordSharedFunctionInfoCodeSlot(shared);
+  SharedFunctionInfo* candidate = shared_function_info_candidates_head_;
+  SharedFunctionInfo* next_candidate;
+  while (candidate != NULL) {
+    next_candidate = GetNextCandidate(candidate);
+    ClearNextCandidate(candidate);
 
-      candidate = next_candidate;
+    Code* code = candidate->code();
+    MarkBit code_mark = Marking::MarkBitFrom(code);
+    if (!code_mark.Get()) {
+      candidate->set_code(lazy_compile);
     }
 
-    jsfunction_candidates_head_ = NULL;
+    Object** code_slot =
+        HeapObject::RawField(candidate, SharedFunctionInfo::kCodeOffset);
+    isolate_->heap()->mark_compact_collector()->
+        RecordSlot(code_slot, code_slot, *code_slot);
+
+    candidate = next_candidate;
   }
 
+  shared_function_info_candidates_head_ = NULL;
+}
 
-  void ProcessSharedFunctionInfoCandidates() {
-    Code* lazy_compile = isolate_->builtins()->builtin(Builtins::kLazyCompile);
 
-    SharedFunctionInfo* candidate = shared_function_info_candidates_head_;
-    SharedFunctionInfo* next_candidate;
+void CodeFlusher::EvictCandidate(JSFunction* function) {
+  ASSERT(!function->next_function_link()->IsUndefined());
+  Object* undefined = isolate_->heap()->undefined_value();
+
+  // The function is no longer a candidate, make sure it gets visited
+  // again so that previous flushing decisions are revisited.
+  isolate_->heap()->incremental_marking()->RecordWrites(function);
+
+  JSFunction* candidate = jsfunction_candidates_head_;
+  JSFunction* next_candidate;
+  if (candidate == function) {
+    next_candidate = GetNextCandidate(function);
+    jsfunction_candidates_head_ = next_candidate;
+    ClearNextCandidate(function, undefined);
+  } else {
     while (candidate != NULL) {
       next_candidate = GetNextCandidate(candidate);
-      SetNextCandidate(candidate, NULL);
 
-      Code* code = candidate->code();
-      MarkBit code_mark = Marking::MarkBitFrom(code);
-      if (!code_mark.Get()) {
-        candidate->set_code(lazy_compile);
+      if (next_candidate == function) {
+        next_candidate = GetNextCandidate(function);
+        SetNextCandidate(candidate, next_candidate);
+        ClearNextCandidate(function, undefined);
       }
 
-      RecordSharedFunctionInfoCodeSlot(candidate);
-
       candidate = next_candidate;
     }
-
-    shared_function_info_candidates_head_ = NULL;
   }
+}
 
-  void RecordSharedFunctionInfoCodeSlot(SharedFunctionInfo* shared) {
-    Object** slot = HeapObject::RawField(shared,
-                                         SharedFunctionInfo::kCodeOffset);
-    isolate_->heap()->mark_compact_collector()->
-        RecordSlot(slot, slot, HeapObject::cast(*slot));
-  }
 
-  static JSFunction** GetNextCandidateField(JSFunction* candidate) {
-    return reinterpret_cast<JSFunction**>(
-        candidate->address() + JSFunction::kCodeEntryOffset);
-  }
+void CodeFlusher::EvictJSFunctionCandidates() {
+  Object* undefined = isolate_->heap()->undefined_value();
 
-  static JSFunction* GetNextCandidate(JSFunction* candidate) {
-    return *GetNextCandidateField(candidate);
+  JSFunction* candidate = jsfunction_candidates_head_;
+  JSFunction* next_candidate;
+  while (candidate != NULL) {
+    next_candidate = GetNextCandidate(candidate);
+    ClearNextCandidate(candidate, undefined);
+    candidate = next_candidate;
   }
 
-  static void SetNextCandidate(JSFunction* candidate,
-                               JSFunction* next_candidate) {
-    *GetNextCandidateField(candidate) = next_candidate;
-  }
+  jsfunction_candidates_head_ = NULL;
+}
 
-  static SharedFunctionInfo** GetNextCandidateField(
-      SharedFunctionInfo* candidate) {
-    Code* code = candidate->code();
-    return reinterpret_cast<SharedFunctionInfo**>(
-        code->address() + Code::kGCMetadataOffset);
-  }
 
-  static SharedFunctionInfo* GetNextCandidate(SharedFunctionInfo* candidate) {
-    return reinterpret_cast<SharedFunctionInfo*>(
-        candidate->code()->gc_metadata());
+void CodeFlusher::EvictSharedFunctionInfoCandidates() {
+  SharedFunctionInfo* candidate = shared_function_info_candidates_head_;
+  SharedFunctionInfo* next_candidate;
+  while (candidate != NULL) {
+    next_candidate = GetNextCandidate(candidate);
+    ClearNextCandidate(candidate);
+    candidate = next_candidate;
   }
 
-  static void SetNextCandidate(SharedFunctionInfo* candidate,
-                               SharedFunctionInfo* next_candidate) {
-    candidate->code()->set_gc_metadata(next_candidate);
-  }
+  shared_function_info_candidates_head_ = NULL;
+}
 
-  Isolate* isolate_;
-  JSFunction* jsfunction_candidates_head_;
-  SharedFunctionInfo* shared_function_info_candidates_head_;
 
-  DISALLOW_COPY_AND_ASSIGN(CodeFlusher);
-};
+void CodeFlusher::IteratePointersToFromSpace(ObjectVisitor* v) {
+  Heap* heap = isolate_->heap();
+
+  JSFunction** slot = &jsfunction_candidates_head_;
+  JSFunction* candidate = jsfunction_candidates_head_;
+  while (candidate != NULL) {
+    if (heap->InFromSpace(candidate)) {
+      v->VisitPointer(reinterpret_cast<Object**>(slot));
+    }
+    candidate = GetNextCandidate(*slot);
+    slot = GetNextCandidateSlot(*slot);
+  }
+}
 
 
 MarkCompactCollector::~MarkCompactCollector() {
@@ -1063,11 +1088,23 @@ class MarkCompactMarkingVisitor
     }
   }
 
+  // Marks the object black and pushes it on the marking stack.
   INLINE(static void MarkObject(Heap* heap, HeapObject* object)) {
     MarkBit mark = Marking::MarkBitFrom(object);
     heap->mark_compact_collector()->MarkObject(object, mark);
   }
 
+  // Marks the object black without pushing it on the marking stack.
+  // Returns true if object needed marking and false otherwise.
+  INLINE(static bool MarkObjectWithoutPush(Heap* heap, HeapObject* object)) {
+    MarkBit mark_bit = Marking::MarkBitFrom(object);
+    if (!mark_bit.Get()) {
+      heap->mark_compact_collector()->SetMark(object, mark_bit);
+      return true;
+    }
+    return false;
+  }
+
   // Mark object pointed to by p.
   INLINE(static void MarkObjectByPointer(MarkCompactCollector* collector,
                                          Object** anchor_slot,
@@ -1120,6 +1157,11 @@ class MarkCompactMarkingVisitor
     return true;
   }
 
+  INLINE(static void BeforeVisitingSharedFunctionInfo(HeapObject* object)) {
+    SharedFunctionInfo* shared = SharedFunctionInfo::cast(object);
+    shared->BeforeVisitingPointers();
+  }
+
   static void VisitJSWeakMap(Map* map, HeapObject* object) {
     MarkCompactCollector* collector = map->GetHeap()->mark_compact_collector();
     JSWeakMap* weak_map = reinterpret_cast<JSWeakMap*>(object);
@@ -1163,123 +1205,8 @@ class MarkCompactMarkingVisitor
 
   // Code flushing support.
 
-  // How many collections newly compiled code object will survive before being
-  // flushed.
-  static const int kCodeAgeThreshold = 5;
-
   static const int kRegExpCodeThreshold = 5;
 
-  inline static bool HasSourceCode(Heap* heap, SharedFunctionInfo* info) {
-    Object* undefined = heap->undefined_value();
-    return (info->script() != undefined) &&
-        (reinterpret_cast<Script*>(info->script())->source() != undefined);
-  }
-
-
-  inline static bool IsCompiled(JSFunction* function) {
-    return function->code() !=
-        function->GetIsolate()->builtins()->builtin(Builtins::kLazyCompile);
-  }
-
-  inline static bool IsCompiled(SharedFunctionInfo* function) {
-    return function->code() !=
-        function->GetIsolate()->builtins()->builtin(Builtins::kLazyCompile);
-  }
-
-  inline static bool IsFlushable(Heap* heap, JSFunction* function) {
-    SharedFunctionInfo* shared_info = function->unchecked_shared();
-
-    // Code is either on stack, in compilation cache or referenced
-    // by optimized version of function.
-    MarkBit code_mark = Marking::MarkBitFrom(function->code());
-    if (code_mark.Get()) {
-      if (!Marking::MarkBitFrom(shared_info).Get()) {
-        shared_info->set_code_age(0);
-      }
-      return false;
-    }
-
-    // We do not flush code for optimized functions.
-    if (function->code() != shared_info->code()) {
-      return false;
-    }
-
-    return IsFlushable(heap, shared_info);
-  }
-
-  inline static bool IsFlushable(Heap* heap, SharedFunctionInfo* shared_info) {
-    // Code is either on stack, in compilation cache or referenced
-    // by optimized version of function.
-    MarkBit code_mark =
-        Marking::MarkBitFrom(shared_info->code());
-    if (code_mark.Get()) {
-      return false;
-    }
-
-    // The function must be compiled and have the source code available,
-    // to be able to recompile it in case we need the function again.
-    if (!(shared_info->is_compiled() && HasSourceCode(heap, shared_info))) {
-      return false;
-    }
-
-    // We never flush code for Api functions.
-    Object* function_data = shared_info->function_data();
-    if (function_data->IsFunctionTemplateInfo()) {
-      return false;
-    }
-
-    // Only flush code for functions.
-    if (shared_info->code()->kind() != Code::FUNCTION) {
-      return false;
-    }
-
-    // Function must be lazy compilable.
-    if (!shared_info->allows_lazy_compilation()) {
-      return false;
-    }
-
-    // If this is a full script wrapped in a function we do no flush the code.
-    if (shared_info->is_toplevel()) {
-      return false;
-    }
-
-    // Age this shared function info.
-    if (shared_info->code_age() < kCodeAgeThreshold) {
-      shared_info->set_code_age(shared_info->code_age() + 1);
-      return false;
-    }
-
-    return true;
-  }
-
-
-  static bool FlushCodeForFunction(Heap* heap, JSFunction* function) {
-    if (!IsFlushable(heap, function)) return false;
-
-    // This function's code looks flushable. But we have to postpone the
-    // decision until we see all functions that point to the same
-    // SharedFunctionInfo because some of them might be optimized.
-    // That would make the nonoptimized version of the code nonflushable,
-    // because it is required for bailing out from optimized code.
-    heap->mark_compact_collector()->code_flusher()->AddCandidate(function);
-    return true;
-  }
-
-  static inline bool IsValidNotBuiltinContext(Object* ctx) {
-    return ctx->IsContext() &&
-        !Context::cast(ctx)->global_object()->IsJSBuiltinsObject();
-  }
-
-
-  static void VisitSharedFunctionInfoGeneric(Map* map, HeapObject* object) {
-    SharedFunctionInfo::cast(object)->BeforeVisitingPointers();
-
-    FixedBodyVisitor<MarkCompactMarkingVisitor,
-                     SharedFunctionInfo::BodyDescriptor,
-                     void>::Visit(map, object);
-  }
-
-
   static void UpdateRegExpCodeAgeAndFlush(Heap* heap,
                                           JSRegExp* re,
                                           bool is_ascii) {
@@ -1353,138 +1280,6 @@ class MarkCompactMarkingVisitor
     VisitJSRegExp(map, object);
   }
 
-
-  static void VisitSharedFunctionInfoAndFlushCode(Map* map,
-                                                  HeapObject* object) {
-    Heap* heap = map->GetHeap();
-    SharedFunctionInfo* shared = reinterpret_cast<SharedFunctionInfo*>(object);
-    if (shared->ic_age() != heap->global_ic_age()) {
-      shared->ResetForNewContext(heap->global_ic_age());
-    }
-
-    MarkCompactCollector* collector = map->GetHeap()->mark_compact_collector();
-    if (!collector->is_code_flushing_enabled()) {
-      VisitSharedFunctionInfoGeneric(map, object);
-      return;
-    }
-    VisitSharedFunctionInfoAndFlushCodeGeneric(map, object, false);
-  }
-
-
-  static void VisitSharedFunctionInfoAndFlushCodeGeneric(
-      Map* map, HeapObject* object, bool known_flush_code_candidate) {
-    Heap* heap = map->GetHeap();
-    SharedFunctionInfo* shared = reinterpret_cast<SharedFunctionInfo*>(object);
-
-    shared->BeforeVisitingPointers();
-
-    if (!known_flush_code_candidate) {
-      known_flush_code_candidate = IsFlushable(heap, shared);
-      if (known_flush_code_candidate) {
-        heap->mark_compact_collector()->code_flusher()->AddCandidate(shared);
-      }
-    }
-
-    VisitSharedFunctionInfoFields(heap, object, known_flush_code_candidate);
-  }
-
-
-  static void VisitJSFunctionAndFlushCode(Map* map, HeapObject* object) {
-    Heap* heap = map->GetHeap();
-    MarkCompactCollector* collector = heap->mark_compact_collector();
-    if (!collector->is_code_flushing_enabled()) {
-      VisitJSFunction(map, object);
-      return;
-    }
-
-    JSFunction* jsfunction = reinterpret_cast<JSFunction*>(object);
-    // The function must have a valid context and not be a builtin.
-    bool flush_code_candidate = false;
-    if (IsValidNotBuiltinContext(jsfunction->unchecked_context())) {
-      flush_code_candidate = FlushCodeForFunction(heap, jsfunction);
-    }
-
-    if (!flush_code_candidate) {
-      Code* code = jsfunction->shared()->code();
-      MarkBit code_mark = Marking::MarkBitFrom(code);
-      collector->MarkObject(code, code_mark);
-
-      if (jsfunction->code()->kind() == Code::OPTIMIZED_FUNCTION) {
-        collector->MarkInlinedFunctionsCode(jsfunction->code());
-      }
-    }
-
-    VisitJSFunctionFields(map,
-                          reinterpret_cast<JSFunction*>(object),
-                          flush_code_candidate);
-  }
-
-
-  static void VisitJSFunction(Map* map, HeapObject* object) {
-    VisitJSFunctionFields(map,
-                          reinterpret_cast<JSFunction*>(object),
-                          false);
-  }
-
-
-  static inline void VisitJSFunctionFields(Map* map,
-                                           JSFunction* object,
-                                           bool flush_code_candidate) {
-    Heap* heap = map->GetHeap();
-
-    VisitPointers(heap,
-                  HeapObject::RawField(object, JSFunction::kPropertiesOffset),
-                  HeapObject::RawField(object, JSFunction::kCodeEntryOffset));
-
-    if (!flush_code_candidate) {
-      VisitCodeEntry(heap, object->address() + JSFunction::kCodeEntryOffset);
-    } else {
-      // Don't visit code object.
-
-      // Visit shared function info to avoid double checking of it's
-      // flushability.
-      SharedFunctionInfo* shared_info = object->unchecked_shared();
-      MarkBit shared_info_mark = Marking::MarkBitFrom(shared_info);
-      if (!shared_info_mark.Get()) {
-        Map* shared_info_map = shared_info->map();
-        MarkBit shared_info_map_mark =
-            Marking::MarkBitFrom(shared_info_map);
-        heap->mark_compact_collector()->SetMark(shared_info, shared_info_mark);
-        heap->mark_compact_collector()->MarkObject(shared_info_map,
-                                                   shared_info_map_mark);
-        VisitSharedFunctionInfoAndFlushCodeGeneric(shared_info_map,
-                                                   shared_info,
-                                                   true);
-      }
-    }
-
-    VisitPointers(
-        heap,
-        HeapObject::RawField(object,
-                             JSFunction::kCodeEntryOffset + kPointerSize),
-        HeapObject::RawField(object, JSFunction::kNonWeakFieldsEndOffset));
-  }
-
-
-  static void VisitSharedFunctionInfoFields(Heap* heap,
-                                            HeapObject* object,
-                                            bool flush_code_candidate) {
-    VisitPointer(heap,
-                 HeapObject::RawField(object, SharedFunctionInfo::kNameOffset));
-
-    if (!flush_code_candidate) {
-      VisitPointer(heap,
-                   HeapObject::RawField(object,
-                                        SharedFunctionInfo::kCodeOffset));
-    }
-
-    VisitPointers(
-        heap,
-        HeapObject::RawField(object,
-                             SharedFunctionInfo::kOptimizedCodeMapOffset),
-        HeapObject::RawField(object, SharedFunctionInfo::kSize));
-  }
-
   static VisitorDispatchTable<Callback> non_count_table_;
 };
 
@@ -1544,7 +1339,8 @@ class MarkCompactMarkingVisitor::ObjectStatsTracker<
     Map* map_obj = Map::cast(obj);
     ASSERT(map->instance_type() == MAP_TYPE);
     DescriptorArray* array = map_obj->instance_descriptors();
-    if (array != heap->empty_descriptor_array()) {
+    if (map_obj->owns_descriptors() &&
+        array != heap->empty_descriptor_array()) {
       int fixed_array_size = array->Size();
       heap->RecordObjectStats(FIXED_ARRAY_TYPE,
                               DESCRIPTOR_ARRAY_SUB_TYPE,
@@ -1620,12 +1416,6 @@ class MarkCompactMarkingVisitor::ObjectStatsTracker<
 void MarkCompactMarkingVisitor::Initialize() {
   StaticMarkingVisitor<MarkCompactMarkingVisitor>::Initialize();
 
-  table_.Register(kVisitSharedFunctionInfo,
-                  &VisitSharedFunctionInfoAndFlushCode);
-
-  table_.Register(kVisitJSFunction,
-                  &VisitJSFunctionAndFlushCode);
-
   table_.Register(kVisitJSRegExp,
                   &VisitRegExpAndFlushCode);
 
@@ -1700,26 +1490,6 @@ class SharedFunctionInfoMarkingVisitor : public ObjectVisitor {
 };
 
 
-void MarkCompactCollector::MarkInlinedFunctionsCode(Code* code) {
-  // For optimized functions we should retain both non-optimized version
-  // of it's code and non-optimized version of all inlined functions.
-  // This is required to support bailing out from inlined code.
-  DeoptimizationInputData* data =
-      DeoptimizationInputData::cast(code->deoptimization_data());
-
-  FixedArray* literals = data->LiteralArray();
-
-  for (int i = 0, count = data->InlinedFunctionCount()->value();
-       i < count;
-       i++) {
-    JSFunction* inlined = JSFunction::cast(literals->get(i));
-    Code* inlined_code = inlined->shared()->code();
-    MarkBit inlined_code_mark = Marking::MarkBitFrom(inlined_code);
-    MarkObject(inlined_code, inlined_code_mark);
-  }
-}
-
-
 void MarkCompactCollector::PrepareThreadForCodeFlushing(Isolate* isolate,
                                                         ThreadLocalTop* top) {
   for (StackFrameIterator it(isolate, top); !it.done(); it.Advance()) {
@@ -1732,7 +1502,8 @@ void MarkCompactCollector::PrepareThreadForCodeFlushing(Isolate* isolate,
     MarkBit code_mark = Marking::MarkBitFrom(code);
     MarkObject(code, code_mark);
     if (frame->is_optimized()) {
-      MarkInlinedFunctionsCode(frame->LookupCode());
+      MarkCompactMarkingVisitor::MarkInlinedFunctionsCode(heap(),
+                                                          frame->LookupCode());
     }
   }
 }
@@ -1741,21 +1512,13 @@ void MarkCompactCollector::PrepareThreadForCodeFlushing(Isolate* isolate,
 void MarkCompactCollector::PrepareForCodeFlushing() {
   ASSERT(heap() == Isolate::Current()->heap());
 
-  // TODO(1609) Currently incremental marker does not support code flushing.
-  if (!FLAG_flush_code || was_marked_incrementally_) {
-    EnableCodeFlushing(false);
-    return;
+  // Enable code flushing for non-incremental cycles.
+  if (FLAG_flush_code && !FLAG_flush_code_incrementally) {
+    EnableCodeFlushing(!was_marked_incrementally_);
   }
 
-#ifdef ENABLE_DEBUGGER_SUPPORT
-  if (heap()->isolate()->debug()->IsLoaded() ||
-      heap()->isolate()->debug()->has_break_points()) {
-    EnableCodeFlushing(false);
-    return;
-  }
-#endif
-
-  EnableCodeFlushing(true);
+  // If code flushing is disabled, there is no need to prepare for it.
+  if (!is_code_flushing_enabled()) return;
 
   // Ensure that empty descriptor array is marked. Method MarkDescriptorArray
   // relies on it being marked before any other descriptor array.
@@ -1874,97 +1637,6 @@ class MarkCompactWeakObjectRetainer : public WeakObjectRetainer {
 };
 
 
-void MarkCompactCollector::ProcessNewlyMarkedObject(HeapObject* object) {
-  ASSERT(IsMarked(object));
-  ASSERT(HEAP->Contains(object));
-  if (object->IsMap()) {
-    Map* map = Map::cast(object);
-    heap_->ClearCacheOnMap(map);
-
-    // When map collection is enabled we have to mark through map's transitions
-    // in a special way to make transition links weak. Only maps for subclasses
-    // of JSReceiver can have transitions.
-    STATIC_ASSERT(LAST_TYPE == LAST_JS_RECEIVER_TYPE);
-    if (FLAG_collect_maps && map->instance_type() >= FIRST_JS_RECEIVER_TYPE) {
-      marker_.MarkMapContents(map);
-    } else {
-      marking_deque_.PushBlack(map);
-    }
-  } else {
-    marking_deque_.PushBlack(object);
-  }
-}
-
-
-// Force instantiation of template instances.
-template void Marker<IncrementalMarking>::MarkMapContents(Map* map);
-template void Marker<MarkCompactCollector>::MarkMapContents(Map* map);
-
-
-template <class T>
-void Marker<T>::MarkMapContents(Map* map) {
-  // Make sure that the back pointer stored either in the map itself or inside
-  // its transitions array is marked. Treat pointers in the transitions array as
-  // weak and also mark that array to prevent visiting it later.
-  base_marker()->MarkObjectAndPush(HeapObject::cast(map->GetBackPointer()));
-
-  Object** transitions_slot =
-      HeapObject::RawField(map, Map::kTransitionsOrBackPointerOffset);
-  Object* transitions = *transitions_slot;
-  if (transitions->IsTransitionArray()) {
-    MarkTransitionArray(reinterpret_cast<TransitionArray*>(transitions));
-  } else {
-    // Already marked by marking map->GetBackPointer().
-    ASSERT(transitions->IsMap() || transitions->IsUndefined());
-  }
-
-  // Mark the Object* fields of the Map. Since the transitions array has been
-  // marked already, it is fine that one of these fields contains a pointer to
-  // it.
-  Object** start_slot =
-      HeapObject::RawField(map, Map::kPointerFieldsBeginOffset);
-  Object** end_slot = HeapObject::RawField(map, Map::kPointerFieldsEndOffset);
-  for (Object** slot = start_slot; slot < end_slot; slot++) {
-    Object* obj = *slot;
-    if (!obj->NonFailureIsHeapObject()) continue;
-    mark_compact_collector()->RecordSlot(start_slot, slot, obj);
-    base_marker()->MarkObjectAndPush(reinterpret_cast<HeapObject*>(obj));
-  }
-}
-
-
-template <class T>
-void Marker<T>::MarkTransitionArray(TransitionArray* transitions) {
-  if (!base_marker()->MarkObjectWithoutPush(transitions)) return;
-  Object** transitions_start = transitions->data_start();
-
-  DescriptorArray* descriptors = transitions->descriptors();
-  base_marker()->MarkObjectAndPush(descriptors);
-  mark_compact_collector()->RecordSlot(
-      transitions_start, transitions->GetDescriptorsSlot(), descriptors);
-
-  if (transitions->HasPrototypeTransitions()) {
-    // Mark prototype transitions array but don't push it into marking stack.
-    // This will make references from it weak. We will clean dead prototype
-    // transitions in ClearNonLiveTransitions.
-    Object** proto_trans_slot = transitions->GetPrototypeTransitionsSlot();
-    HeapObject* prototype_transitions = HeapObject::cast(*proto_trans_slot);
-    base_marker()->MarkObjectWithoutPush(prototype_transitions);
-    mark_compact_collector()->RecordSlot(
-        transitions_start, proto_trans_slot, prototype_transitions);
-  }
-
-  for (int i = 0; i < transitions->number_of_transitions(); ++i) {
-    Object** key_slot = transitions->GetKeySlot(i);
-    Object* key = *key_slot;
-    if (key->IsHeapObject()) {
-      base_marker()->MarkObjectAndPush(HeapObject::cast(key));
-      mark_compact_collector()->RecordSlot(transitions_start, key_slot, key);
-    }
-  }
-}
-
-
 // Fill the marking stack with overflowed objects returned by the given
 // iterator.  Stop when the marking stack is filled or the end of the space
 // is reached, whichever comes first.
@@ -2077,6 +1749,16 @@ bool MarkCompactCollector::IsUnmarkedHeapObject(Object** p) {
 }
 
 
+bool MarkCompactCollector::IsUnmarkedHeapObjectWithHeap(Heap* heap,
+                                                        Object** p) {
+  Object* o = *p;
+  ASSERT(o->IsHeapObject());
+  HeapObject* heap_object = HeapObject::cast(o);
+  MarkBit mark = Marking::MarkBitFrom(heap_object);
+  return !mark.Get();
+}
+
+
 void MarkCompactCollector::MarkSymbolTable() {
   SymbolTable* symbol_table = heap()->symbol_table();
   // Mark the symbol table itself.
@@ -2105,54 +1787,6 @@ void MarkCompactCollector::MarkRoots(RootMarkingVisitor* visitor) {
 }
 
 
-void MarkCompactCollector::MarkObjectGroups() {
-  List<ObjectGroup*>* object_groups =
-      heap()->isolate()->global_handles()->object_groups();
-
-  int last = 0;
-  for (int i = 0; i < object_groups->length(); i++) {
-    ObjectGroup* entry = object_groups->at(i);
-    ASSERT(entry != NULL);
-
-    Object*** objects = entry->objects_;
-    bool group_marked = false;
-    for (size_t j = 0; j < entry->length_; j++) {
-      Object* object = *objects[j];
-      if (object->IsHeapObject()) {
-        HeapObject* heap_object = HeapObject::cast(object);
-        MarkBit mark = Marking::MarkBitFrom(heap_object);
-        if (mark.Get()) {
-          group_marked = true;
-          break;
-        }
-      }
-    }
-
-    if (!group_marked) {
-      (*object_groups)[last++] = entry;
-      continue;
-    }
-
-    // An object in the group is marked, so mark as grey all white heap
-    // objects in the group.
-    for (size_t j = 0; j < entry->length_; ++j) {
-      Object* object = *objects[j];
-      if (object->IsHeapObject()) {
-        HeapObject* heap_object = HeapObject::cast(object);
-        MarkBit mark = Marking::MarkBitFrom(heap_object);
-        MarkObject(heap_object, mark);
-      }
-    }
-
-    // Once the entire group has been colored grey, set the object group
-    // to NULL so it won't be processed again.
-    entry->Dispose();
-    object_groups->at(i) = NULL;
-  }
-  object_groups->Rewind(last);
-}
-
-
 void MarkCompactCollector::MarkImplicitRefGroups() {
   List<ImplicitRefGroup*>* ref_groups =
       heap()->isolate()->global_handles()->implicit_ref_groups();
@@ -2271,11 +1905,12 @@ void MarkCompactCollector::ProcessMarkingDeque() {
 }
 
 
-void MarkCompactCollector::ProcessExternalMarking() {
+void MarkCompactCollector::ProcessExternalMarking(RootMarkingVisitor* visitor) {
   bool work_to_do = true;
   ASSERT(marking_deque_.IsEmpty());
   while (work_to_do) {
-    MarkObjectGroups();
+    heap()->isolate()->global_handles()->IterateObjectGroups(
+        visitor, &IsUnmarkedHeapObjectWithHeap);
     MarkImplicitRefGroups();
     work_to_do = !marking_deque_.IsEmpty();
     ProcessMarkingDeque();
@@ -2298,7 +1933,7 @@ void MarkCompactCollector::MarkLiveObjects() {
     // non-incremental marker can deal with them as if overflow
     // occured during normal marking.
     // But incremental marker uses a separate marking deque
-    // so we have to explicitly copy it's overflow state.
+    // so we have to explicitly copy its overflow state.
     incremental_marking->Finalize();
     incremental_marking_overflowed =
         incremental_marking->marking_deque()->overflowed();
@@ -2354,7 +1989,7 @@ void MarkCompactCollector::MarkLiveObjects() {
   // The objects reachable from the roots are marked, yet unreachable
   // objects are unmarked.  Mark objects reachable due to host
   // application specific logic.
-  ProcessExternalMarking();
+  ProcessExternalMarking(&root_visitor);
 
   // The objects reachable from the roots or object groups are marked,
   // yet unreachable objects are unmarked.  Mark objects reachable
@@ -2373,7 +2008,7 @@ void MarkCompactCollector::MarkLiveObjects() {
 
   // Repeat host application specific marking to mark unmarked objects
   // reachable from the weak roots.
-  ProcessExternalMarking();
+  ProcessExternalMarking(&root_visitor);
 
   AfterMarking();
 }
@@ -2407,6 +2042,11 @@ void MarkCompactCollector::AfterMarking() {
   // Flush code from collected candidates.
   if (is_code_flushing_enabled()) {
     code_flusher_->ProcessCandidates();
+    // If incremental marker does not support code flushing, we need to
+    // disable it before incremental marking steps for next cycle.
+    if (FLAG_flush_code && !FLAG_flush_code_incrementally) {
+      EnableCodeFlushing(false);
+    }
   }
 
   if (!FLAG_watch_ic_patching) {
@@ -2714,15 +2354,33 @@ class PointersUpdatingVisitor: public ObjectVisitor {
   void VisitEmbeddedPointer(RelocInfo* rinfo) {
     ASSERT(rinfo->rmode() == RelocInfo::EMBEDDED_OBJECT);
     Object* target = rinfo->target_object();
+    Object* old_target = target;
     VisitPointer(&target);
-    rinfo->set_target_object(target);
+    // Avoid unnecessary changes that might unnecessary flush the instruction
+    // cache.
+    if (target != old_target) {
+      rinfo->set_target_object(target);
+    }
   }
 
   void VisitCodeTarget(RelocInfo* rinfo) {
     ASSERT(RelocInfo::IsCodeTarget(rinfo->rmode()));
     Object* target = Code::GetCodeFromTargetAddress(rinfo->target_address());
+    Object* old_target = target;
     VisitPointer(&target);
-    rinfo->set_target_address(Code::cast(target)->instruction_start());
+    if (target != old_target) {
+      rinfo->set_target_address(Code::cast(target)->instruction_start());
+    }
+  }
+
+  void VisitCodeAgeSequence(RelocInfo* rinfo) {
+    ASSERT(RelocInfo::IsCodeAgeSequence(rinfo->rmode()));
+    Object* stub = rinfo->code_age_stub();
+    ASSERT(stub != NULL);
+    VisitPointer(&stub);
+    if (stub != rinfo->code_age_stub()) {
+      rinfo->set_code_age_stub(Code::cast(stub));
+    }
   }
 
   void VisitDebugTarget(RelocInfo* rinfo) {
@@ -3426,7 +3084,7 @@ void MarkCompactCollector::EvacuateNewSpaceAndCandidates() {
 
   heap_->isolate()->inner_pointer_to_code_cache()->Flush();
 
-#ifdef DEBUG
+#ifdef VERIFY_HEAP
   if (FLAG_verify_heap) {
     VerifyEvacuation(heap_);
   }
@@ -3834,7 +3492,6 @@ void MarkCompactCollector::SweepSpace(PagedSpace* space, SweeperType sweeper) {
 
   intptr_t freed_bytes = 0;
   int pages_swept = 0;
-  intptr_t newspace_size = space->heap()->new_space()->Size();
   bool lazy_sweeping_active = false;
   bool unused_page_present = false;
 
@@ -3897,15 +3554,8 @@ void MarkCompactCollector::SweepSpace(PagedSpace* space, SweeperType sweeper) {
         }
         freed_bytes += SweepConservatively(space, p);
         pages_swept++;
-        if (freed_bytes > 2 * newspace_size) {
-          space->SetPagesToSweep(p->next_page());
-          lazy_sweeping_active = true;
-        } else {
-          if (FLAG_gc_verbose) {
-            PrintF("Only %" V8PRIdPTR " bytes freed.  Still sweeping.\n",
-                   freed_bytes);
-          }
-        }
+        space->SetPagesToSweep(p->next_page());
+        lazy_sweeping_active = true;
         break;
       }
       case PRECISE: {
@@ -3973,11 +3623,19 @@ void MarkCompactCollector::SweepSpaces() {
 
 
 void MarkCompactCollector::EnableCodeFlushing(bool enable) {
+#ifdef ENABLE_DEBUGGER_SUPPORT
+  if (heap()->isolate()->debug()->IsLoaded() ||
+      heap()->isolate()->debug()->has_break_points()) {
+    enable = false;
+  }
+#endif
+
   if (enable) {
     if (code_flusher_ != NULL) return;
     code_flusher_ = new CodeFlusher(heap()->isolate());
   } else {
     if (code_flusher_ == NULL) return;
+    code_flusher_->EvictAllCandidates();
     delete code_flusher_;
     code_flusher_ = NULL;
   }
diff --git a/deps/v8/src/mark-compact.h b/deps/v8/src/mark-compact.h
index d252e1928e..9a0b014d63 100644
--- a/deps/v8/src/mark-compact.h
+++ b/deps/v8/src/mark-compact.h
@@ -304,6 +304,26 @@ class SlotsBuffer {
     NUMBER_OF_SLOT_TYPES
   };
 
+  static const char* SlotTypeToString(SlotType type) {
+    switch (type) {
+      case EMBEDDED_OBJECT_SLOT:
+        return "EMBEDDED_OBJECT_SLOT";
+      case RELOCATED_CODE_OBJECT:
+        return "RELOCATED_CODE_OBJECT";
+      case CODE_TARGET_SLOT:
+        return "CODE_TARGET_SLOT";
+      case CODE_ENTRY_SLOT:
+        return "CODE_ENTRY_SLOT";
+      case DEBUG_TARGET_SLOT:
+        return "DEBUG_TARGET_SLOT";
+      case JS_RETURN_SLOT:
+        return "JS_RETURN_SLOT";
+      case NUMBER_OF_SLOT_TYPES:
+        return "NUMBER_OF_SLOT_TYPES";
+    }
+    return "UNKNOWN SlotType";
+  }
+
   void UpdateSlots(Heap* heap);
 
   void UpdateSlotsWithFilter(Heap* heap);
@@ -383,30 +403,96 @@ class SlotsBuffer {
 };
 
 
-// -------------------------------------------------------------------------
-// Marker shared between incremental and non-incremental marking
-template<class BaseMarker> class Marker {
+// CodeFlusher collects candidates for code flushing during marking and
+// processes those candidates after marking has completed in order to
+// reset those functions referencing code objects that would otherwise
+// be unreachable. Code objects can be referenced in two ways:
+//    - SharedFunctionInfo references unoptimized code.
+//    - JSFunction references either unoptimized or optimized code.
+// We are not allowed to flush unoptimized code for functions that got
+// optimized or inlined into optimized code, because we might bailout
+// into the unoptimized code again during deoptimization.
+class CodeFlusher {
  public:
-  Marker(BaseMarker* base_marker, MarkCompactCollector* mark_compact_collector)
-      : base_marker_(base_marker),
-        mark_compact_collector_(mark_compact_collector) {}
+  explicit CodeFlusher(Isolate* isolate)
+      : isolate_(isolate),
+        jsfunction_candidates_head_(NULL),
+        shared_function_info_candidates_head_(NULL) {}
+
+  void AddCandidate(SharedFunctionInfo* shared_info) {
+    if (GetNextCandidate(shared_info) == NULL) {
+      SetNextCandidate(shared_info, shared_function_info_candidates_head_);
+      shared_function_info_candidates_head_ = shared_info;
+    }
+  }
 
-  // Mark pointers in a Map and its DescriptorArray together, possibly
-  // treating transitions or back pointers weak.
-  void MarkMapContents(Map* map);
-  void MarkTransitionArray(TransitionArray* transitions);
+  void AddCandidate(JSFunction* function) {
+    ASSERT(function->code() == function->shared()->code());
+    if (GetNextCandidate(function)->IsUndefined()) {
+      SetNextCandidate(function, jsfunction_candidates_head_);
+      jsfunction_candidates_head_ = function;
+    }
+  }
+
+  void EvictCandidate(JSFunction* function);
+
+  void ProcessCandidates() {
+    ProcessSharedFunctionInfoCandidates();
+    ProcessJSFunctionCandidates();
+  }
+
+  void EvictAllCandidates() {
+    EvictJSFunctionCandidates();
+    EvictSharedFunctionInfoCandidates();
+  }
+
+  void IteratePointersToFromSpace(ObjectVisitor* v);
 
  private:
-  BaseMarker* base_marker() {
-    return base_marker_;
+  void ProcessJSFunctionCandidates();
+  void ProcessSharedFunctionInfoCandidates();
+  void EvictJSFunctionCandidates();
+  void EvictSharedFunctionInfoCandidates();
+
+  static JSFunction** GetNextCandidateSlot(JSFunction* candidate) {
+    return reinterpret_cast<JSFunction**>(
+        HeapObject::RawField(candidate, JSFunction::kNextFunctionLinkOffset));
+  }
+
+  static JSFunction* GetNextCandidate(JSFunction* candidate) {
+    Object* next_candidate = candidate->next_function_link();
+    return reinterpret_cast<JSFunction*>(next_candidate);
+  }
+
+  static void SetNextCandidate(JSFunction* candidate,
+                               JSFunction* next_candidate) {
+    candidate->set_next_function_link(next_candidate);
   }
 
-  MarkCompactCollector* mark_compact_collector() {
-    return mark_compact_collector_;
+  static void ClearNextCandidate(JSFunction* candidate, Object* undefined) {
+    ASSERT(undefined->IsUndefined());
+    candidate->set_next_function_link(undefined, SKIP_WRITE_BARRIER);
   }
 
-  BaseMarker* base_marker_;
-  MarkCompactCollector* mark_compact_collector_;
+  static SharedFunctionInfo* GetNextCandidate(SharedFunctionInfo* candidate) {
+    Object* next_candidate = candidate->code()->gc_metadata();
+    return reinterpret_cast<SharedFunctionInfo*>(next_candidate);
+  }
+
+  static void SetNextCandidate(SharedFunctionInfo* candidate,
+                               SharedFunctionInfo* next_candidate) {
+    candidate->code()->set_gc_metadata(next_candidate);
+  }
+
+  static void ClearNextCandidate(SharedFunctionInfo* candidate) {
+    candidate->code()->set_gc_metadata(NULL, SKIP_WRITE_BARRIER);
+  }
+
+  Isolate* isolate_;
+  JSFunction* jsfunction_candidates_head_;
+  SharedFunctionInfo* shared_function_info_candidates_head_;
+
+  DISALLOW_COPY_AND_ASSIGN(CodeFlusher);
 };
 
 
@@ -504,7 +590,7 @@ class MarkCompactCollector {
     PRECISE
   };
 
-#ifdef DEBUG
+#ifdef VERIFY_HEAP
   void VerifyMarkbitsAreClean();
   static void VerifyMarkbitsAreClean(PagedSpace* space);
   static void VerifyMarkbitsAreClean(NewSpace* space);
@@ -572,8 +658,12 @@ class MarkCompactCollector {
 
   void ClearMarkbits();
 
+  bool abort_incremental_marking() const { return abort_incremental_marking_; }
+
   bool is_compacting() const { return compacting_; }
 
+  MarkingParity marking_parity() { return marking_parity_; }
+
  private:
   MarkCompactCollector();
   ~MarkCompactCollector();
@@ -606,6 +696,8 @@ class MarkCompactCollector {
 
   bool abort_incremental_marking_;
 
+  MarkingParity marking_parity_;
+
   // True if we are collecting slots to perform evacuation from evacuation
   // candidates.
   bool compacting_;
@@ -637,12 +729,6 @@ class MarkCompactCollector {
   friend class MarkCompactMarkingVisitor;
   friend class CodeMarkingVisitor;
   friend class SharedFunctionInfoMarkingVisitor;
-  friend class Marker<IncrementalMarking>;
-  friend class Marker<MarkCompactCollector>;
-
-  // Mark non-optimize code for functions inlined into the given optimized
-  // code. This will prevent it from being flushed.
-  void MarkInlinedFunctionsCode(Code* code);
 
   // Mark code objects that are active on the stack to prevent them
   // from being flushed.
@@ -656,25 +742,13 @@ class MarkCompactCollector {
   void AfterMarking();
 
   // Marks the object black and pushes it on the marking stack.
-  // Returns true if object needed marking and false otherwise.
-  // This is for non-incremental marking only.
-  INLINE(bool MarkObjectAndPush(HeapObject* obj));
-
-  // Marks the object black and pushes it on the marking stack.
   // This is for non-incremental marking only.
   INLINE(void MarkObject(HeapObject* obj, MarkBit mark_bit));
 
-  // Marks the object black without pushing it on the marking stack.
-  // Returns true if object needed marking and false otherwise.
-  // This is for non-incremental marking only.
-  INLINE(bool MarkObjectWithoutPush(HeapObject* obj));
-
   // Marks the object black assuming that it is not yet marked.
   // This is for non-incremental marking only.
   INLINE(void SetMark(HeapObject* obj, MarkBit mark_bit));
 
-  void ProcessNewlyMarkedObject(HeapObject* obj);
-
   // Mark the heap roots and all objects reachable from them.
   void MarkRoots(RootMarkingVisitor* visitor);
 
@@ -682,17 +756,13 @@ class MarkCompactCollector {
   // symbol table are weak.
   void MarkSymbolTable();
 
-  // Mark objects in object groups that have at least one object in the
-  // group marked.
-  void MarkObjectGroups();
-
   // Mark objects in implicit references groups if their parent object
   // is marked.
   void MarkImplicitRefGroups();
 
   // Mark all objects which are reachable due to host application
   // logic like object groups or implicit references' groups.
-  void ProcessExternalMarking();
+  void ProcessExternalMarking(RootMarkingVisitor* visitor);
 
   // Mark objects reachable (transitively) from objects in the marking stack
   // or overflowed in the heap.
@@ -716,6 +786,7 @@ class MarkCompactCollector {
   // Callback function for telling whether the object *p is an unmarked
   // heap object.
   static bool IsUnmarkedHeapObject(Object** p);
+  static bool IsUnmarkedHeapObjectWithHeap(Heap* heap, Object** p);
 
   // Map transitions from a live map to a dead map must be killed.
   // We replace them with a null descriptor, with the same key.
@@ -777,7 +848,6 @@ class MarkCompactCollector {
   MarkingDeque marking_deque_;
   CodeFlusher* code_flusher_;
   Object* encountered_weak_maps_;
-  Marker<MarkCompactCollector> marker_;
 
   List<Page*> evacuation_candidates_;
   List<Code*> invalidated_code_;
diff --git a/deps/v8/src/math.js b/deps/v8/src/math.js
index aee56af4f9..46863284f0 100644
--- a/deps/v8/src/math.js
+++ b/deps/v8/src/math.js
@@ -131,19 +131,16 @@ function MathMax(arg1, arg2) {  // length == 2
     // All comparisons failed, one of the arguments must be NaN.
     return 0/0;  // Compiler constant-folds this to NaN.
   }
-  if (length == 0) {
-    return -1/0;  // Compiler constant-folds this to -Infinity.
-  }
-  var r = arg1;
-  if (!IS_NUMBER(r)) r = NonNumberToNumber(r);
-  if (NUMBER_IS_NAN(r)) return r;
-  for (var i = 1; i < length; i++) {
+  var r = -1/0;  // Compiler constant-folds this to -Infinity.
+  for (var i = 0; i < length; i++) {
     var n = %_Arguments(i);
     if (!IS_NUMBER(n)) n = NonNumberToNumber(n);
-    if (NUMBER_IS_NAN(n)) return n;
     // Make sure +0 is considered greater than -0.  -0 is never a Smi, +0 can be
     // a Smi or heap number.
-    if (n > r || (r == 0 && n == 0 && !%_IsSmi(r) && 1 / r < 0)) r = n;
+    if (NUMBER_IS_NAN(n) || n > r ||
+        (r == 0 && n == 0 && !%_IsSmi(r) && 1 / r < 0)) {
+      r = n;
+    }
   }
   return r;
 }
@@ -164,19 +161,16 @@ function MathMin(arg1, arg2) {  // length == 2
     // All comparisons failed, one of the arguments must be NaN.
     return 0/0;  // Compiler constant-folds this to NaN.
   }
-  if (length == 0) {
-    return 1/0;  // Compiler constant-folds this to Infinity.
-  }
-  var r = arg1;
-  if (!IS_NUMBER(r)) r = NonNumberToNumber(r);
-  if (NUMBER_IS_NAN(r)) return r;
-  for (var i = 1; i < length; i++) {
+  var r = 1/0;  // Compiler constant-folds this to Infinity.
+  for (var i = 0; i < length; i++) {
     var n = %_Arguments(i);
     if (!IS_NUMBER(n)) n = NonNumberToNumber(n);
-    if (NUMBER_IS_NAN(n)) return n;
     // Make sure -0 is considered less than +0.  -0 is never a Smi, +0 can be a
     // Smi or a heap number.
-    if (n < r || (r == 0 && n == 0 && !%_IsSmi(n) && 1 / n < 0)) r = n;
+    if (NUMBER_IS_NAN(n) || n < r ||
+        (r == 0 && n == 0 && !%_IsSmi(n) && 1 / n < 0)) {
+      r = n;
+    }
   }
   return r;
 }
diff --git a/deps/v8/src/messages.cc b/deps/v8/src/messages.cc
index a0793c2dfd..ce965fcf95 100644
--- a/deps/v8/src/messages.cc
+++ b/deps/v8/src/messages.cc
@@ -106,11 +106,20 @@ void MessageHandler::ReportMessage(Isolate* isolate,
   // We are calling into embedder's code which can throw exceptions.
   // Thus we need to save current exception state, reset it to the clean one
   // and ignore scheduled exceptions callbacks can throw.
+
+  // We pass the exception object into the message handler callback though.
+  Object* exception_object = isolate->heap()->undefined_value();
+  if (isolate->has_pending_exception()) {
+    isolate->pending_exception()->ToObject(&exception_object);
+  }
+  Handle<Object> exception_handle(exception_object);
+
   Isolate::ExceptionScope exception_scope(isolate);
   isolate->clear_pending_exception();
   isolate->set_external_caught_exception(false);
 
   v8::Local<v8::Message> api_message_obj = v8::Utils::MessageToLocal(message);
+  v8::Local<v8::Value> api_exception_obj = v8::Utils::ToLocal(exception_handle);
 
   v8::NeanderArray global_listeners(FACTORY->message_listeners());
   int global_length = global_listeners.length();
@@ -123,15 +132,13 @@ void MessageHandler::ReportMessage(Isolate* isolate,
     for (int i = 0; i < global_length; i++) {
       HandleScope scope;
       if (global_listeners.get(i)->IsUndefined()) continue;
-      v8::NeanderObject listener(JSObject::cast(global_listeners.get(i)));
-      Handle<Foreign> callback_obj(Foreign::cast(listener.get(0)));
+      Handle<Foreign> callback_obj(Foreign::cast(global_listeners.get(i)));
       v8::MessageCallback callback =
           FUNCTION_CAST<v8::MessageCallback>(callback_obj->foreign_address());
-      Handle<Object> callback_data(listener.get(1));
       {
         // Do not allow exceptions to propagate.
         v8::TryCatch try_catch;
-        callback(api_message_obj, v8::Utils::ToLocal(callback_data));
+        callback(api_message_obj, api_exception_obj);
       }
       if (isolate->has_scheduled_exception()) {
         isolate->clear_scheduled_exception();
@@ -148,7 +155,9 @@ Handle<String> MessageHandler::GetMessage(Handle<Object> data) {
           JSFunction::cast(
               Isolate::Current()->js_builtins_object()->
               GetPropertyNoExceptionThrown(*fmt_str)));
-  Handle<Object> argv[] = { data };
+  Handle<JSMessageObject> message = Handle<JSMessageObject>::cast(data);
+  Handle<Object> argv[] = { Handle<Object>(message->type()),
+                            Handle<Object>(message->arguments()) };
 
   bool caught_exception;
   Handle<Object> result =
diff --git a/deps/v8/src/messages.js b/deps/v8/src/messages.js
index d896ac3944..0a50ae7861 100644
--- a/deps/v8/src/messages.js
+++ b/deps/v8/src/messages.js
@@ -26,18 +26,137 @@
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 // -------------------------------------------------------------------
-//
-// If this object gets passed to an error constructor the error will
-// get an accessor for .message that constructs a descriptive error
-// message on access.
-var kAddMessageAccessorsMarker = { };
-
-// This will be lazily initialized when first needed (and forcibly
-// overwritten even though it's const).
-var kMessages = 0;
 
-function FormatString(format, message) {
-  var args = %MessageGetArguments(message);
+var kMessages = {
+  // Error
+  cyclic_proto:                  ["Cyclic __proto__ value"],
+  code_gen_from_strings:         ["%0"],
+  // TypeError
+  unexpected_token:              ["Unexpected token ", "%0"],
+  unexpected_token_number:       ["Unexpected number"],
+  unexpected_token_string:       ["Unexpected string"],
+  unexpected_token_identifier:   ["Unexpected identifier"],
+  unexpected_reserved:           ["Unexpected reserved word"],
+  unexpected_strict_reserved:    ["Unexpected strict mode reserved word"],
+  unexpected_eos:                ["Unexpected end of input"],
+  malformed_regexp:              ["Invalid regular expression: /", "%0", "/: ", "%1"],
+  unterminated_regexp:           ["Invalid regular expression: missing /"],
+  regexp_flags:                  ["Cannot supply flags when constructing one RegExp from another"],
+  incompatible_method_receiver:  ["Method ", "%0", " called on incompatible receiver ", "%1"],
+  invalid_lhs_in_assignment:     ["Invalid left-hand side in assignment"],
+  invalid_lhs_in_for_in:         ["Invalid left-hand side in for-in"],
+  invalid_lhs_in_postfix_op:     ["Invalid left-hand side expression in postfix operation"],
+  invalid_lhs_in_prefix_op:      ["Invalid left-hand side expression in prefix operation"],
+  multiple_defaults_in_switch:   ["More than one default clause in switch statement"],
+  newline_after_throw:           ["Illegal newline after throw"],
+  redeclaration:                 ["%0", " '", "%1", "' has already been declared"],
+  no_catch_or_finally:           ["Missing catch or finally after try"],
+  unknown_label:                 ["Undefined label '", "%0", "'"],
+  uncaught_exception:            ["Uncaught ", "%0"],
+  stack_trace:                   ["Stack Trace:\n", "%0"],
+  called_non_callable:           ["%0", " is not a function"],
+  undefined_method:              ["Object ", "%1", " has no method '", "%0", "'"],
+  property_not_function:         ["Property '", "%0", "' of object ", "%1", " is not a function"],
+  cannot_convert_to_primitive:   ["Cannot convert object to primitive value"],
+  not_constructor:               ["%0", " is not a constructor"],
+  not_defined:                   ["%0", " is not defined"],
+  non_object_property_load:      ["Cannot read property '", "%0", "' of ", "%1"],
+  non_object_property_store:     ["Cannot set property '", "%0", "' of ", "%1"],
+  non_object_property_call:      ["Cannot call method '", "%0", "' of ", "%1"],
+  with_expression:               ["%0", " has no properties"],
+  illegal_invocation:            ["Illegal invocation"],
+  no_setter_in_callback:         ["Cannot set property ", "%0", " of ", "%1", " which has only a getter"],
+  apply_non_function:            ["Function.prototype.apply was called on ", "%0", ", which is a ", "%1", " and not a function"],
+  apply_wrong_args:              ["Function.prototype.apply: Arguments list has wrong type"],
+  invalid_in_operator_use:       ["Cannot use 'in' operator to search for '", "%0", "' in ", "%1"],
+  instanceof_function_expected:  ["Expecting a function in instanceof check, but got ", "%0"],
+  instanceof_nonobject_proto:    ["Function has non-object prototype '", "%0", "' in instanceof check"],
+  null_to_object:                ["Cannot convert null to object"],
+  reduce_no_initial:             ["Reduce of empty array with no initial value"],
+  getter_must_be_callable:       ["Getter must be a function: ", "%0"],
+  setter_must_be_callable:       ["Setter must be a function: ", "%0"],
+  value_and_accessor:            ["Invalid property.  A property cannot both have accessors and be writable or have a value, ", "%0"],
+  proto_object_or_null:          ["Object prototype may only be an Object or null"],
+  property_desc_object:          ["Property description must be an object: ", "%0"],
+  redefine_disallowed:           ["Cannot redefine property: ", "%0"],
+  define_disallowed:             ["Cannot define property:", "%0", ", object is not extensible."],
+  non_extensible_proto:          ["%0", " is not extensible"],
+  handler_non_object:            ["Proxy.", "%0", " called with non-object as handler"],
+  proto_non_object:              ["Proxy.", "%0", " called with non-object as prototype"],
+  trap_function_expected:        ["Proxy.", "%0", " called with non-function for '", "%1", "' trap"],
+  handler_trap_missing:          ["Proxy handler ", "%0", " has no '", "%1", "' trap"],
+  handler_trap_must_be_callable: ["Proxy handler ", "%0", " has non-callable '", "%1", "' trap"],
+  handler_returned_false:        ["Proxy handler ", "%0", " returned false from '", "%1", "' trap"],
+  handler_returned_undefined:    ["Proxy handler ", "%0", " returned undefined from '", "%1", "' trap"],
+  proxy_prop_not_configurable:   ["Proxy handler ", "%0", " returned non-configurable descriptor for property '", "%2", "' from '", "%1", "' trap"],
+  proxy_non_object_prop_names:   ["Trap '", "%1", "' returned non-object ", "%0"],
+  proxy_repeated_prop_name:      ["Trap '", "%1", "' returned repeated property name '", "%2", "'"],
+  invalid_weakmap_key:           ["Invalid value used as weak map key"],
+  not_date_object:               ["this is not a Date object."],
+  observe_non_object:            ["Object.", "%0", " cannot ", "%0", " non-object"],
+  observe_non_function:          ["Object.", "%0", " cannot deliver to non-function"],
+  observe_callback_frozen:       ["Object.observe cannot deliver to a frozen function object"],
+  observe_type_non_string:       ["Invalid changeRecord with non-string 'type' property"],
+  observe_notify_non_notifier:   ["notify called on non-notifier object"],
+  // RangeError
+  invalid_array_length:          ["Invalid array length"],
+  stack_overflow:                ["Maximum call stack size exceeded"],
+  invalid_time_value:            ["Invalid time value"],
+  // SyntaxError
+  unable_to_parse:               ["Parse error"],
+  invalid_regexp_flags:          ["Invalid flags supplied to RegExp constructor '", "%0", "'"],
+  invalid_regexp:                ["Invalid RegExp pattern /", "%0", "/"],
+  illegal_break:                 ["Illegal break statement"],
+  illegal_continue:              ["Illegal continue statement"],
+  illegal_return:                ["Illegal return statement"],
+  illegal_let:                   ["Illegal let declaration outside extended mode"],
+  error_loading_debugger:        ["Error loading debugger"],
+  no_input_to_regexp:            ["No input to ", "%0"],
+  invalid_json:                  ["String '", "%0", "' is not valid JSON"],
+  circular_structure:            ["Converting circular structure to JSON"],
+  called_on_non_object:          ["%0", " called on non-object"],
+  called_on_null_or_undefined:   ["%0", " called on null or undefined"],
+  array_indexof_not_defined:     ["Array.getIndexOf: Argument undefined"],
+  object_not_extensible:         ["Can't add property ", "%0", ", object is not extensible"],
+  illegal_access:                ["Illegal access"],
+  invalid_preparser_data:        ["Invalid preparser data for function ", "%0"],
+  strict_mode_with:              ["Strict mode code may not include a with statement"],
+  strict_catch_variable:         ["Catch variable may not be eval or arguments in strict mode"],
+  too_many_arguments:            ["Too many arguments in function call (only 32766 allowed)"],
+  too_many_parameters:           ["Too many parameters in function definition (only 32766 allowed)"],
+  too_many_variables:            ["Too many variables declared (only 131071 allowed)"],
+  strict_param_name:             ["Parameter name eval or arguments is not allowed in strict mode"],
+  strict_param_dupe:             ["Strict mode function may not have duplicate parameter names"],
+  strict_var_name:               ["Variable name may not be eval or arguments in strict mode"],
+  strict_function_name:          ["Function name may not be eval or arguments in strict mode"],
+  strict_octal_literal:          ["Octal literals are not allowed in strict mode."],
+  strict_duplicate_property:     ["Duplicate data property in object literal not allowed in strict mode"],
+  accessor_data_property:        ["Object literal may not have data and accessor property with the same name"],
+  accessor_get_set:              ["Object literal may not have multiple get/set accessors with the same name"],
+  strict_lhs_assignment:         ["Assignment to eval or arguments is not allowed in strict mode"],
+  strict_lhs_postfix:            ["Postfix increment/decrement may not have eval or arguments operand in strict mode"],
+  strict_lhs_prefix:             ["Prefix increment/decrement may not have eval or arguments operand in strict mode"],
+  strict_reserved_word:          ["Use of future reserved word in strict mode"],
+  strict_delete:                 ["Delete of an unqualified identifier in strict mode."],
+  strict_delete_property:        ["Cannot delete property '", "%0", "' of ", "%1"],
+  strict_const:                  ["Use of const in strict mode."],
+  strict_function:               ["In strict mode code, functions can only be declared at top level or immediately within another function." ],
+  strict_read_only_property:     ["Cannot assign to read only property '", "%0", "' of ", "%1"],
+  strict_cannot_assign:          ["Cannot assign to read only '", "%0", "' in strict mode"],
+  strict_poison_pill:            ["'caller', 'callee', and 'arguments' properties may not be accessed on strict mode functions or the arguments objects for calls to them"],
+  strict_caller:                 ["Illegal access to a strict mode caller function."],
+  unprotected_let:               ["Illegal let declaration in unprotected statement context."],
+  unprotected_const:             ["Illegal const declaration in unprotected statement context."],
+  cant_prevent_ext_external_array_elements: ["Cannot prevent extension of an object with external array elements"],
+  redef_external_array_element:  ["Cannot redefine a property of an object with external array elements"],
+  harmony_const_assign:          ["Assignment to constant variable."],
+  invalid_module_path:           ["Module does not export '", "%0", "', or export is not itself a module"],
+  module_type_error:             ["Module '", "%0", "' used improperly"],
+  module_export_undefined:       ["Export '", "%0", "' is not defined in module"],
+};
+
+
+function FormatString(format, args) {
   var result = "";
   var arg_num = 0;
   for (var i = 0; i < format.length; i++) {
@@ -48,7 +167,7 @@ function FormatString(format, message) {
       if (arg_num < 4) {
         // str is one of %0, %1, %2 or %3.
         try {
-          str = ToDetailString(args[arg_num]);
+          str = NoSideEffectToString(args[arg_num]);
         } catch (e) {
           if (%IsJSModule(args[arg_num]))
             str = "module";
@@ -65,6 +184,27 @@ function FormatString(format, message) {
 }
 
 
+function NoSideEffectToString(obj) {
+  if (IS_STRING(obj)) return obj;
+  if (IS_NUMBER(obj)) return %_NumberToString(obj);
+  if (IS_BOOLEAN(obj)) return x ? 'true' : 'false';
+  if (IS_UNDEFINED(obj)) return 'undefined';
+  if (IS_NULL(obj)) return 'null';
+  if (IS_FUNCTION(obj)) return  %_CallFunction(obj, FunctionToString);
+  if (IS_OBJECT(obj) && %GetDataProperty(obj, "toString") === ObjectToString) {
+    var constructor = obj.constructor;
+    if (typeof constructor == "function") {
+      var constructorName = constructor.name;
+      if (IS_STRING(constructorName) && constructorName !== "") {
+        return "#<" + constructorName + ">";
+      }
+    }
+  }
+  if (IsNativeErrorObject(obj)) return %_CallFunction(obj, ErrorToString);
+  return %_CallFunction(obj, ObjectToString);
+}
+
+
 // To check if something is a native error we need to check the
 // concrete native error types. It is not sufficient to use instanceof
 // since it possible to create an object that has Error.prototype on
@@ -112,13 +252,8 @@ function ToDetailString(obj) {
 
 
 function MakeGenericError(constructor, type, args) {
-  if (IS_UNDEFINED(args)) {
-    args = [];
-  }
-  var e = new constructor(kAddMessageAccessorsMarker);
-  e.type = type;
-  e.arguments = args;
-  return e;
+  if (IS_UNDEFINED(args)) args = [];
+  return new constructor(FormatMessage(type, args));
 }
 
 
@@ -135,156 +270,10 @@ function MakeGenericError(constructor, type, args) {
 
 
 // Helper functions; called from the runtime system.
-function FormatMessage(message) {
-  if (kMessages === 0) {
-    var messagesDictionary = [
-      // Error
-      "cyclic_proto",                 ["Cyclic __proto__ value"],
-      "code_gen_from_strings",        ["Code generation from strings disallowed for this context"],
-      // TypeError
-      "unexpected_token",             ["Unexpected token ", "%0"],
-      "unexpected_token_number",      ["Unexpected number"],
-      "unexpected_token_string",      ["Unexpected string"],
-      "unexpected_token_identifier",  ["Unexpected identifier"],
-      "unexpected_reserved",          ["Unexpected reserved word"],
-      "unexpected_strict_reserved",   ["Unexpected strict mode reserved word"],
-      "unexpected_eos",               ["Unexpected end of input"],
-      "malformed_regexp",             ["Invalid regular expression: /", "%0", "/: ", "%1"],
-      "unterminated_regexp",          ["Invalid regular expression: missing /"],
-      "regexp_flags",                 ["Cannot supply flags when constructing one RegExp from another"],
-      "incompatible_method_receiver", ["Method ", "%0", " called on incompatible receiver ", "%1"],
-      "invalid_lhs_in_assignment",    ["Invalid left-hand side in assignment"],
-      "invalid_lhs_in_for_in",        ["Invalid left-hand side in for-in"],
-      "invalid_lhs_in_postfix_op",    ["Invalid left-hand side expression in postfix operation"],
-      "invalid_lhs_in_prefix_op",     ["Invalid left-hand side expression in prefix operation"],
-      "multiple_defaults_in_switch",  ["More than one default clause in switch statement"],
-      "newline_after_throw",          ["Illegal newline after throw"],
-      "redeclaration",                ["%0", " '", "%1", "' has already been declared"],
-      "no_catch_or_finally",          ["Missing catch or finally after try"],
-      "unknown_label",                ["Undefined label '", "%0", "'"],
-      "uncaught_exception",           ["Uncaught ", "%0"],
-      "stack_trace",                  ["Stack Trace:\n", "%0"],
-      "called_non_callable",          ["%0", " is not a function"],
-      "undefined_method",             ["Object ", "%1", " has no method '", "%0", "'"],
-      "property_not_function",        ["Property '", "%0", "' of object ", "%1", " is not a function"],
-      "cannot_convert_to_primitive",  ["Cannot convert object to primitive value"],
-      "not_constructor",              ["%0", " is not a constructor"],
-      "not_defined",                  ["%0", " is not defined"],
-      "non_object_property_load",     ["Cannot read property '", "%0", "' of ", "%1"],
-      "non_object_property_store",    ["Cannot set property '", "%0", "' of ", "%1"],
-      "non_object_property_call",     ["Cannot call method '", "%0", "' of ", "%1"],
-      "with_expression",              ["%0", " has no properties"],
-      "illegal_invocation",           ["Illegal invocation"],
-      "no_setter_in_callback",        ["Cannot set property ", "%0", " of ", "%1", " which has only a getter"],
-      "apply_non_function",           ["Function.prototype.apply was called on ", "%0", ", which is a ", "%1", " and not a function"],
-      "apply_wrong_args",             ["Function.prototype.apply: Arguments list has wrong type"],
-      "invalid_in_operator_use",      ["Cannot use 'in' operator to search for '", "%0", "' in ", "%1"],
-      "instanceof_function_expected", ["Expecting a function in instanceof check, but got ", "%0"],
-      "instanceof_nonobject_proto",   ["Function has non-object prototype '", "%0", "' in instanceof check"],
-      "null_to_object",               ["Cannot convert null to object"],
-      "reduce_no_initial",            ["Reduce of empty array with no initial value"],
-      "getter_must_be_callable",      ["Getter must be a function: ", "%0"],
-      "setter_must_be_callable",      ["Setter must be a function: ", "%0"],
-      "value_and_accessor",           ["Invalid property.  A property cannot both have accessors and be writable or have a value, ", "%0"],
-      "proto_object_or_null",         ["Object prototype may only be an Object or null"],
-      "property_desc_object",         ["Property description must be an object: ", "%0"],
-      "redefine_disallowed",          ["Cannot redefine property: ", "%0"],
-      "define_disallowed",            ["Cannot define property:", "%0", ", object is not extensible."],
-      "non_extensible_proto",         ["%0", " is not extensible"],
-      "handler_non_object",           ["Proxy.", "%0", " called with non-object as handler"],
-      "proto_non_object",             ["Proxy.", "%0", " called with non-object as prototype"],
-      "trap_function_expected",       ["Proxy.", "%0", " called with non-function for '", "%1", "' trap"],
-      "handler_trap_missing",         ["Proxy handler ", "%0", " has no '", "%1", "' trap"],
-      "handler_trap_must_be_callable", ["Proxy handler ", "%0", " has non-callable '", "%1", "' trap"],
-      "handler_returned_false",       ["Proxy handler ", "%0", " returned false from '", "%1", "' trap"],
-      "handler_returned_undefined",   ["Proxy handler ", "%0", " returned undefined from '", "%1", "' trap"],
-      "proxy_prop_not_configurable",  ["Proxy handler ", "%0", " returned non-configurable descriptor for property '", "%2", "' from '", "%1", "' trap"],
-      "proxy_non_object_prop_names",  ["Trap '", "%1", "' returned non-object ", "%0"],
-      "proxy_repeated_prop_name",     ["Trap '", "%1", "' returned repeated property name '", "%2", "'"],
-      "invalid_weakmap_key",          ["Invalid value used as weak map key"],
-      "not_date_object",              ["this is not a Date object."],
-      // RangeError
-      "invalid_array_length",         ["Invalid array length"],
-      "stack_overflow",               ["Maximum call stack size exceeded"],
-      "invalid_time_value",           ["Invalid time value"],
-      // SyntaxError
-      "unable_to_parse",              ["Parse error"],
-      "invalid_regexp_flags",         ["Invalid flags supplied to RegExp constructor '", "%0", "'"],
-      "invalid_regexp",               ["Invalid RegExp pattern /", "%0", "/"],
-      "illegal_break",                ["Illegal break statement"],
-      "illegal_continue",             ["Illegal continue statement"],
-      "illegal_return",               ["Illegal return statement"],
-      "illegal_let",                  ["Illegal let declaration outside extended mode"],
-      "error_loading_debugger",       ["Error loading debugger"],
-      "no_input_to_regexp",           ["No input to ", "%0"],
-      "invalid_json",                 ["String '", "%0", "' is not valid JSON"],
-      "circular_structure",           ["Converting circular structure to JSON"],
-      "called_on_non_object",         ["%0", " called on non-object"],
-      "called_on_null_or_undefined",  ["%0", " called on null or undefined"],
-      "array_indexof_not_defined",    ["Array.getIndexOf: Argument undefined"],
-      "object_not_extensible",        ["Can't add property ", "%0", ", object is not extensible"],
-      "illegal_access",               ["Illegal access"],
-      "invalid_preparser_data",       ["Invalid preparser data for function ", "%0"],
-      "strict_mode_with",             ["Strict mode code may not include a with statement"],
-      "strict_catch_variable",        ["Catch variable may not be eval or arguments in strict mode"],
-      "too_many_arguments",           ["Too many arguments in function call (only 32766 allowed)"],
-      "too_many_parameters",          ["Too many parameters in function definition (only 32766 allowed)"],
-      "too_many_variables",           ["Too many variables declared (only 65535 allowed)"],
-      "strict_param_name",            ["Parameter name eval or arguments is not allowed in strict mode"],
-      "strict_param_dupe",            ["Strict mode function may not have duplicate parameter names"],
-      "strict_var_name",              ["Variable name may not be eval or arguments in strict mode"],
-      "strict_function_name",         ["Function name may not be eval or arguments in strict mode"],
-      "strict_octal_literal",         ["Octal literals are not allowed in strict mode."],
-      "strict_duplicate_property",    ["Duplicate data property in object literal not allowed in strict mode"],
-      "accessor_data_property",       ["Object literal may not have data and accessor property with the same name"],
-      "accessor_get_set",             ["Object literal may not have multiple get/set accessors with the same name"],
-      "strict_lhs_assignment",        ["Assignment to eval or arguments is not allowed in strict mode"],
-      "strict_lhs_postfix",           ["Postfix increment/decrement may not have eval or arguments operand in strict mode"],
-      "strict_lhs_prefix",            ["Prefix increment/decrement may not have eval or arguments operand in strict mode"],
-      "strict_reserved_word",         ["Use of future reserved word in strict mode"],
-      "strict_delete",                ["Delete of an unqualified identifier in strict mode."],
-      "strict_delete_property",       ["Cannot delete property '", "%0", "' of ", "%1"],
-      "strict_const",                 ["Use of const in strict mode."],
-      "strict_function",              ["In strict mode code, functions can only be declared at top level or immediately within another function." ],
-      "strict_read_only_property",    ["Cannot assign to read only property '", "%0", "' of ", "%1"],
-      "strict_cannot_assign",         ["Cannot assign to read only '", "%0", "' in strict mode"],
-      "strict_poison_pill",           ["'caller', 'callee', and 'arguments' properties may not be accessed on strict mode functions or the arguments objects for calls to them"],
-      "strict_caller",                ["Illegal access to a strict mode caller function."],
-      "unprotected_let",              ["Illegal let declaration in unprotected statement context."],
-      "unprotected_const",            ["Illegal const declaration in unprotected statement context."],
-      "cant_prevent_ext_external_array_elements", ["Cannot prevent extension of an object with external array elements"],
-      "redef_external_array_element", ["Cannot redefine a property of an object with external array elements"],
-      "harmony_const_assign",         ["Assignment to constant variable."],
-      "invalid_module_path",          ["Module does not export '", "%0", "', or export is not itself a module"],
-      "module_type_error",            ["Module '", "%0", "' used improperly"],
-      "module_export_undefined",      ["Export '", "%0", "' is not defined in module"],
-    ];
-    var messages = { __proto__ : null };
-    for (var i = 0; i < messagesDictionary.length; i += 2) {
-      var key = messagesDictionary[i];
-      var format = messagesDictionary[i + 1];
-
-      for (var j = 0; j < format.length; j++) {
-        %IgnoreAttributesAndSetProperty(format, %_NumberToString(j), format[j],
-                                        DONT_DELETE | READ_ONLY | DONT_ENUM);
-      }
-      %IgnoreAttributesAndSetProperty(format, 'length', format.length,
-                                      DONT_DELETE | READ_ONLY | DONT_ENUM);
-      %PreventExtensions(format);
-      %IgnoreAttributesAndSetProperty(messages,
-                                      key,
-                                      format,
-                                      DONT_DELETE | DONT_ENUM | READ_ONLY);
-    }
-    %PreventExtensions(messages);
-    %IgnoreAttributesAndSetProperty(builtins, "kMessages",
-                                    messages,
-                                    DONT_DELETE | DONT_ENUM | READ_ONLY);
-  }
-  var message_type = %MessageGetType(message);
-  var format = kMessages[message_type];
-  if (!format) return "<unknown message " + message_type + ">";
-  return FormatString(format, message);
+function FormatMessage(type, args) {
+  var format = kMessages[type];
+  if (!format) return "<unknown message " + type + ">";
+  return FormatString(format, args);
 }
 
 
@@ -532,8 +521,8 @@ function ScriptLineCount() {
 
 
 /**
- * Returns the name of script if available, contents of sourceURL comment
- * otherwise. See
+ * If sourceURL comment is available and script starts at zero returns sourceURL
+ * comment contents. Otherwise, script name is returned. See
  * http://fbug.googlecode.com/svn/branches/firebug1.1/docs/ReleaseNotes_1.1.txt
  * for details on using //@ sourceURL comment to identify scritps that don't
  * have name.
@@ -542,14 +531,15 @@ function ScriptLineCount() {
  * otherwise.
  */
 function ScriptNameOrSourceURL() {
-  if (this.name) {
+  if (this.line_offset > 0 || this.column_offset > 0) {
     return this.name;
   }
 
   // The result is cached as on long scripts it takes noticable time to search
   // for the sourceURL.
-  if (this.hasCachedNameOrSourceURL)
-      return this.cachedNameOrSourceURL;
+  if (this.hasCachedNameOrSourceURL) {
+    return this.cachedNameOrSourceURL;
+  }
   this.hasCachedNameOrSourceURL = true;
 
   // TODO(608): the spaces in a regexp below had to be escaped as \040
@@ -761,29 +751,6 @@ function GetStackTraceLine(recv, fun, pos, isGlobal) {
 // ----------------------------------------------------------------------------
 // Error implementation
 
-// Defines accessors for a property that is calculated the first time
-// the property is read.
-function DefineOneShotAccessor(obj, name, fun) {
-  // Note that the accessors consistently operate on 'obj', not 'this'.
-  // Since the object may occur in someone else's prototype chain we
-  // can't rely on 'this' being the same as 'obj'.
-  var value;
-  var value_factory = fun;
-  var getter = function() {
-    if (value_factory == null) {
-      return value;
-    }
-    value = value_factory(obj);
-    value_factory = null;
-    return value;
-  };
-  var setter = function(v) {
-    value_factory = null;
-    value = v;
-  };
-  %DefineOrRedefineAccessorProperty(obj, name, getter, setter, DONT_ENUM);
-}
-
 function CallSite(receiver, fun, pos) {
   this.receiver = receiver;
   this.fun = fun;
@@ -1118,9 +1085,21 @@ function captureStackTrace(obj, cons_opt) {
   var raw_stack = %CollectStackTrace(obj,
                                      cons_opt ? cons_opt : captureStackTrace,
                                      stackTraceLimit);
-  DefineOneShotAccessor(obj, 'stack', function (obj) {
-    return FormatRawStackTrace(obj, raw_stack);
-  });
+  // Note that 'obj' and 'this' maybe different when called on objects that
+  // have the error object on its prototype chain.  The getter replaces itself
+  // with a data property as soon as the stack trace has been formatted.
+  var getter = function() {
+    var value = FormatRawStackTrace(obj, raw_stack);
+    %DefineOrRedefineDataProperty(obj, 'stack', value, NONE);
+    return value;
+  };
+  // The 'stack' property of the receiver is set as data property.  If
+  // the receiver is the same as holder, this accessor pair is replaced.
+  var setter = function(v) {
+    %DefineOrRedefineDataProperty(this, 'stack', v, NONE);
+  };
+
+  %DefineOrRedefineAccessorProperty(obj, 'stack', getter, setter, DONT_ENUM);
 }
 
 
@@ -1159,15 +1138,7 @@ function SetUpError() {
         // object. This avoids going through getters and setters defined
         // on prototype objects.
         %IgnoreAttributesAndSetProperty(this, 'stack', void 0, DONT_ENUM);
-        %IgnoreAttributesAndSetProperty(this, 'arguments', void 0, DONT_ENUM);
-        %IgnoreAttributesAndSetProperty(this, 'type', void 0, DONT_ENUM);
-        if (m === kAddMessageAccessorsMarker) {
-          // DefineOneShotAccessor always inserts a message property and
-          // ignores setters.
-          DefineOneShotAccessor(this, 'message', function (obj) {
-              return FormatMessage(%NewMessageObject(obj.type, obj.arguments));
-          });
-        } else if (!IS_UNDEFINED(m)) {
+        if (!IS_UNDEFINED(m)) {
           %IgnoreAttributesAndSetProperty(
             this, 'message', ToString(m), DONT_ENUM);
         }
@@ -1226,15 +1197,9 @@ function GetPropertyWithoutInvokingMonkeyGetters(error, name) {
 function ErrorToStringDetectCycle(error) {
   if (!%PushIfAbsent(visited_errors, error)) throw cyclic_error_marker;
   try {
-    var type = GetPropertyWithoutInvokingMonkeyGetters(error, "type");
     var name = GetPropertyWithoutInvokingMonkeyGetters(error, "name");
     name = IS_UNDEFINED(name) ? "Error" : TO_STRING_INLINE(name);
     var message = GetPropertyWithoutInvokingMonkeyGetters(error, "message");
-    var hasMessage = %_CallFunction(error, "message", ObjectHasOwnProperty);
-    if (type && !hasMessage) {
-      var args = GetPropertyWithoutInvokingMonkeyGetters(error, "arguments");
-      message = FormatMessage(%NewMessageObject(type, args));
-    }
     message = IS_UNDEFINED(message) ? "" : TO_STRING_INLINE(message);
     if (name === "") return message;
     if (message === "") return name;
@@ -1266,4 +1231,37 @@ InstallFunctions($Error.prototype, DONT_ENUM, ['toString', ErrorToString]);
 
 // Boilerplate for exceptions for stack overflows. Used from
 // Isolate::StackOverflow().
-var kStackOverflowBoilerplate = MakeRangeError('stack_overflow', []);
+function SetUpStackOverflowBoilerplate() {
+  var boilerplate = MakeRangeError('stack_overflow', []);
+
+  // The raw stack trace is stored as hidden property of the copy of this
+  // boilerplate error object.  Note that the receiver 'this' may not be that
+  // error object copy, but can be found on the prototype chain of 'this'.
+  // When the stack trace is formatted, this accessor property is replaced by
+  // a data property.
+  function getter() {
+    var holder = this;
+    while (!IS_ERROR(holder)) {
+      holder = %GetPrototype(holder);
+      if (holder == null) return MakeSyntaxError('illegal_access', []);
+    }
+    var raw_stack = %GetOverflowedRawStackTrace(holder);
+    var result = IS_ARRAY(raw_stack) ? FormatRawStackTrace(holder, raw_stack)
+                                     : void 0;
+    %DefineOrRedefineDataProperty(holder, 'stack', result, NONE);
+    return result;
+  }
+
+  // The 'stack' property of the receiver is set as data property.  If
+  // the receiver is the same as holder, this accessor pair is replaced.
+  function setter(v) {
+    %DefineOrRedefineDataProperty(this, 'stack', v, NONE);
+  }
+
+  %DefineOrRedefineAccessorProperty(
+      boilerplate, 'stack', getter, setter, DONT_ENUM);
+
+  return boilerplate;
+}
+
+var kStackOverflowBoilerplate = SetUpStackOverflowBoilerplate();
diff --git a/deps/v8/src/mips/assembler-mips-inl.h b/deps/v8/src/mips/assembler-mips-inl.h
index 522bc78687..caf544f7c8 100644
--- a/deps/v8/src/mips/assembler-mips-inl.h
+++ b/deps/v8/src/mips/assembler-mips-inl.h
@@ -1,3 +1,4 @@
+
 // Copyright (c) 1994-2006 Sun Microsystems Inc.
 // All Rights Reserved.
 //
@@ -156,6 +157,11 @@ void RelocInfo::set_target_address(Address target, WriteBarrierMode mode) {
 }
 
 
+Address Assembler::target_address_from_return_address(Address pc) {
+  return pc - kCallTargetAddressOffset;
+}
+
+
 Object* RelocInfo::target_object() {
   ASSERT(IsCodeTarget(rmode_) || rmode_ == EMBEDDED_OBJECT);
   return reinterpret_cast<Object*>(Assembler::target_address_at(pc_));
@@ -226,6 +232,24 @@ void RelocInfo::set_target_cell(JSGlobalPropertyCell* cell,
 }
 
 
+static const int kNoCodeAgeSequenceLength = 7;
+
+Code* RelocInfo::code_age_stub() {
+  ASSERT(rmode_ == RelocInfo::CODE_AGE_SEQUENCE);
+  return Code::GetCodeFromTargetAddress(
+      Memory::Address_at(pc_ + Assembler::kInstrSize *
+                         (kNoCodeAgeSequenceLength - 1)));
+}
+
+
+void RelocInfo::set_code_age_stub(Code* stub) {
+  ASSERT(rmode_ == RelocInfo::CODE_AGE_SEQUENCE);
+  Memory::Address_at(pc_ + Assembler::kInstrSize *
+                     (kNoCodeAgeSequenceLength - 1)) =
+      stub->instruction_start();
+}
+
+
 Address RelocInfo::call_address() {
   ASSERT((IsJSReturn(rmode()) && IsPatchedReturnSequence()) ||
          (IsDebugBreakSlot(rmode()) && IsPatchedDebugBreakSlotSequence()));
@@ -297,6 +321,8 @@ void RelocInfo::Visit(ObjectVisitor* visitor) {
     visitor->VisitGlobalPropertyCell(this);
   } else if (mode == RelocInfo::EXTERNAL_REFERENCE) {
     visitor->VisitExternalReference(this);
+  } else if (RelocInfo::IsCodeAgeSequence(mode)) {
+    visitor->VisitCodeAgeSequence(this);
 #ifdef ENABLE_DEBUGGER_SUPPORT
   // TODO(isolates): Get a cached isolate below.
   } else if (((RelocInfo::IsJSReturn(mode) &&
@@ -323,6 +349,8 @@ void RelocInfo::Visit(Heap* heap) {
     StaticVisitor::VisitGlobalPropertyCell(heap, this);
   } else if (mode == RelocInfo::EXTERNAL_REFERENCE) {
     StaticVisitor::VisitExternalReference(this);
+  } else if (RelocInfo::IsCodeAgeSequence(mode)) {
+    StaticVisitor::VisitCodeAgeSequence(heap, this);
 #ifdef ENABLE_DEBUGGER_SUPPORT
   } else if (heap->isolate()->debug()->has_break_points() &&
              ((RelocInfo::IsJSReturn(mode) &&
diff --git a/deps/v8/src/mips/assembler-mips.cc b/deps/v8/src/mips/assembler-mips.cc
index 801ca2c152..e7506206c9 100644
--- a/deps/v8/src/mips/assembler-mips.cc
+++ b/deps/v8/src/mips/assembler-mips.cc
@@ -267,45 +267,11 @@ const Instr kLwSwInstrArgumentMask  = ~kLwSwInstrTypeMask;
 const Instr kLwSwOffsetMask = kImm16Mask;
 
 
-// Spare buffer.
-static const int kMinimalBufferSize = 4 * KB;
-
-
-Assembler::Assembler(Isolate* arg_isolate, void* buffer, int buffer_size)
-    : AssemblerBase(arg_isolate),
+Assembler::Assembler(Isolate* isolate, void* buffer, int buffer_size)
+    : AssemblerBase(isolate, buffer, buffer_size),
       recorded_ast_id_(TypeFeedbackId::None()),
-      positions_recorder_(this),
-      emit_debug_code_(FLAG_debug_code) {
-  if (buffer == NULL) {
-    // Do our own buffer management.
-    if (buffer_size <= kMinimalBufferSize) {
-      buffer_size = kMinimalBufferSize;
-
-      if (isolate()->assembler_spare_buffer() != NULL) {
-        buffer = isolate()->assembler_spare_buffer();
-        isolate()->set_assembler_spare_buffer(NULL);
-      }
-    }
-    if (buffer == NULL) {
-      buffer_ = NewArray<byte>(buffer_size);
-    } else {
-      buffer_ = static_cast<byte*>(buffer);
-    }
-    buffer_size_ = buffer_size;
-    own_buffer_ = true;
-
-  } else {
-    // Use externally provided buffer instead.
-    ASSERT(buffer_size > 0);
-    buffer_ = static_cast<byte*>(buffer);
-    buffer_size_ = buffer_size;
-    own_buffer_ = false;
-  }
-
-  // Set up buffer pointers.
-  ASSERT(buffer_ != NULL);
-  pc_ = buffer_;
-  reloc_info_writer.Reposition(buffer_ + buffer_size, pc_);
+      positions_recorder_(this) {
+  reloc_info_writer.Reposition(buffer_ + buffer_size_, pc_);
 
   last_trampoline_pool_end_ = 0;
   no_trampoline_pool_before_ = 0;
@@ -324,18 +290,6 @@ Assembler::Assembler(Isolate* arg_isolate, void* buffer, int buffer_size)
 }
 
 
-Assembler::~Assembler() {
-  if (own_buffer_) {
-    if (isolate()->assembler_spare_buffer() == NULL &&
-        buffer_size_ == kMinimalBufferSize) {
-      isolate()->set_assembler_spare_buffer(buffer_);
-    } else {
-      DeleteArray(buffer_);
-    }
-  }
-}
-
-
 void Assembler::GetCode(CodeDesc* desc) {
   ASSERT(pc_ <= reloc_info_writer.pos());  // No overlap.
   // Set up code descriptor.
@@ -580,17 +534,20 @@ bool Assembler::IsNop(Instr instr, unsigned int type) {
   // See Assembler::nop(type).
   ASSERT(type < 32);
   uint32_t opcode = GetOpcodeField(instr);
+  uint32_t function = GetFunctionField(instr);
   uint32_t rt = GetRt(instr);
-  uint32_t rs = GetRs(instr);
+  uint32_t rd = GetRd(instr);
   uint32_t sa = GetSa(instr);
 
-  // nop(type) == sll(zero_reg, zero_reg, type);
-  // Technically all these values will be 0 but
-  // this makes more sense to the reader.
+  // Traditional mips nop == sll(zero_reg, zero_reg, 0)
+  // When marking non-zero type, use sll(zero_reg, at, type)
+  // to avoid use of mips ssnop and ehb special encodings
+  // of the sll instruction.
 
-  bool ret = (opcode == SLL &&
-              rt == static_cast<uint32_t>(ToNumber(zero_reg)) &&
-              rs == static_cast<uint32_t>(ToNumber(zero_reg)) &&
+  Register nop_rt_reg = (type == 0) ? zero_reg : at;
+  bool ret = (opcode == SPECIAL && function == SLL &&
+              rd == static_cast<uint32_t>(ToNumber(zero_reg)) &&
+              rt == static_cast<uint32_t>(ToNumber(nop_rt_reg)) &&
               sa == type);
 
   return ret;
diff --git a/deps/v8/src/mips/assembler-mips.h b/deps/v8/src/mips/assembler-mips.h
index 7163770178..75d110a36c 100644
--- a/deps/v8/src/mips/assembler-mips.h
+++ b/deps/v8/src/mips/assembler-mips.h
@@ -318,12 +318,15 @@ const FPURegister f31 = { 31 };
 
 // Register aliases.
 // cp is assumed to be a callee saved register.
-static const Register& kLithiumScratchReg = s3;  // Scratch register.
-static const Register& kLithiumScratchReg2 = s4;  // Scratch register.
-static const Register& kRootRegister = s6;  // Roots array pointer.
-static const Register& cp = s7;     // JavaScript context pointer.
-static const DoubleRegister& kLithiumScratchDouble = f30;
-static const FPURegister& kDoubleRegZero = f28;
+// Defined using #define instead of "static const Register&" because Clang
+// complains otherwise when a compilation unit that includes this header
+// doesn't use the variables.
+#define kRootRegister s6
+#define cp s7
+#define kLithiumScratchReg s3
+#define kLithiumScratchReg2 s4
+#define kLithiumScratchDouble f30
+#define kDoubleRegZero f28
 
 // FPU (coprocessor 1) control registers.
 // Currently only FCSR (#31) is implemented.
@@ -520,13 +523,7 @@ class Assembler : public AssemblerBase {
   // is too small, a fatal error occurs. No deallocation of the buffer is done
   // upon destruction of the assembler.
   Assembler(Isolate* isolate, void* buffer, int buffer_size);
-  ~Assembler();
-
-  // Overrides the default provided by FLAG_debug_code.
-  void set_emit_debug_code(bool value) { emit_debug_code_ = value; }
-
-  // Dummy for cross platform compatibility.
-  void set_predictable_code_size(bool value) { }
+  virtual ~Assembler() { }
 
   // GetCode emits any pending (non-emitted) code and fills the descriptor
   // desc. GetCode() is idempotent; it returns the same result if no other
@@ -571,6 +568,10 @@ class Assembler : public AssemblerBase {
   static Address target_address_at(Address pc);
   static void set_target_address_at(Address pc, Address target);
 
+  // Return the code target address at a call site from the return address
+  // of that call in the instruction stream.
+  inline static Address target_address_from_return_address(Address pc);
+
   static void JumpLabelToJumpRegister(Address pc);
 
   static void QuietNaN(HeapObject* nan);
@@ -631,6 +632,8 @@ class Assembler : public AssemblerBase {
   // register.
   static const int kPcLoadDelta = 4;
 
+  static const int kPatchDebugBreakSlotReturnOffset = 4 * kInstrSize;
+
   // Number of instructions used for the JS return sequence. The constant is
   // used by the debugger to patch the JS return sequence.
   static const int kJSReturnSequenceInstructions = 7;
@@ -660,13 +663,18 @@ class Assembler : public AssemblerBase {
     PROPERTY_ACCESS_INLINED_CONTEXT_DONT_DELETE,
     // Helper values.
     LAST_CODE_MARKER,
-    FIRST_IC_MARKER = PROPERTY_ACCESS_INLINED
+    FIRST_IC_MARKER = PROPERTY_ACCESS_INLINED,
+    // Code aging
+    CODE_AGE_MARKER_NOP = 6
   };
 
-  // Type == 0 is the default non-marking type.
+  // Type == 0 is the default non-marking nop. For mips this is a
+  // sll(zero_reg, zero_reg, 0). We use rt_reg == at for non-zero
+  // marking, to avoid conflict with ssnop and ehb instructions.
   void nop(unsigned int type = 0) {
     ASSERT(type < 32);
-    sll(zero_reg, zero_reg, type, true);
+    Register nop_rt_reg = (type == 0) ? zero_reg : at;
+    sll(zero_reg, nop_rt_reg, type, true);
   }
 
 
@@ -935,8 +943,6 @@ class Assembler : public AssemblerBase {
   void db(uint8_t data);
   void dd(uint32_t data);
 
-  int32_t pc_offset() const { return pc_ - buffer_; }
-
   PositionsRecorder* positions_recorder() { return &positions_recorder_; }
 
   // Postpone the generation of the trampoline pool for the specified number of
@@ -1021,8 +1027,6 @@ class Assembler : public AssemblerBase {
   // the relocation info.
   TypeFeedbackId recorded_ast_id_;
 
-  bool emit_debug_code() const { return emit_debug_code_; }
-
   int32_t buffer_space() const { return reloc_info_writer.pos() - pc_; }
 
   // Decode branch instruction at pos and return branch target pos.
@@ -1081,13 +1085,6 @@ class Assembler : public AssemblerBase {
   }
 
  private:
-  // Code buffer:
-  // The buffer into which code and relocation info are generated.
-  byte* buffer_;
-  int buffer_size_;
-  // True if the assembler owns the buffer, false if buffer is external.
-  bool own_buffer_;
-
   // Buffer size and constant pool distance are checked together at regular
   // intervals of kBufferCheckInterval emitted bytes.
   static const int kBufferCheckInterval = 1*KB/2;
@@ -1098,7 +1095,6 @@ class Assembler : public AssemblerBase {
   // not have to check for overflow. The same is true for writes of large
   // relocation info entries.
   static const int kGap = 32;
-  byte* pc_;  // The program counter - moves forward.
 
 
   // Repeated checking whether the trampoline pool should be emitted is rather
@@ -1273,7 +1269,6 @@ class Assembler : public AssemblerBase {
   friend class BlockTrampolinePoolScope;
 
   PositionsRecorder positions_recorder_;
-  bool emit_debug_code_;
   friend class PositionsRecorder;
   friend class EnsureSpace;
 };
diff --git a/deps/v8/src/mips/builtins-mips.cc b/deps/v8/src/mips/builtins-mips.cc
index 0342e6505d..b2348fca20 100644
--- a/deps/v8/src/mips/builtins-mips.cc
+++ b/deps/v8/src/mips/builtins-mips.cc
@@ -1255,6 +1255,48 @@ void Builtins::Generate_LazyRecompile(MacroAssembler* masm) {
 }
 
 
+static void GenerateMakeCodeYoungAgainCommon(MacroAssembler* masm) {
+  // For now, we are relying on the fact that make_code_young doesn't do any
+  // garbage collection which allows us to save/restore the registers without
+  // worrying about which of them contain pointers. We also don't build an
+  // internal frame to make the code faster, since we shouldn't have to do stack
+  // crawls in MakeCodeYoung. This seems a bit fragile.
+
+  __ mov(a0, ra);
+  // Adjust a0 to point to the head of the PlatformCodeAge sequence
+  __ Subu(a0, a0,
+      Operand((kNoCodeAgeSequenceLength - 1) * Assembler::kInstrSize));
+  // Restore the original return address of the function
+  __ mov(ra, at);
+
+  // The following registers must be saved and restored when calling through to
+  // the runtime:
+  //   a0 - contains return address (beginning of patch sequence)
+  //   a1 - function object
+  RegList saved_regs =
+      (a0.bit() | a1.bit() | ra.bit() | fp.bit()) & ~sp.bit();
+  FrameScope scope(masm, StackFrame::MANUAL);
+  __ MultiPush(saved_regs);
+  __ PrepareCallCFunction(1, 0, a1);
+  __ CallCFunction(
+      ExternalReference::get_make_code_young_function(masm->isolate()), 1);
+  __ MultiPop(saved_regs);
+  __ Jump(a0);
+}
+
+#define DEFINE_CODE_AGE_BUILTIN_GENERATOR(C)                 \
+void Builtins::Generate_Make##C##CodeYoungAgainEvenMarking(  \
+    MacroAssembler* masm) {                                  \
+  GenerateMakeCodeYoungAgainCommon(masm);                    \
+}                                                            \
+void Builtins::Generate_Make##C##CodeYoungAgainOddMarking(   \
+    MacroAssembler* masm) {                                  \
+  GenerateMakeCodeYoungAgainCommon(masm);                    \
+}
+CODE_AGE_LIST(DEFINE_CODE_AGE_BUILTIN_GENERATOR)
+#undef DEFINE_CODE_AGE_BUILTIN_GENERATOR
+
+
 static void Generate_NotifyDeoptimizedHelper(MacroAssembler* masm,
                                              Deoptimizer::BailoutType type) {
   {
diff --git a/deps/v8/src/mips/code-stubs-mips.cc b/deps/v8/src/mips/code-stubs-mips.cc
index a5c80b8471..a05cee86bb 100644
--- a/deps/v8/src/mips/code-stubs-mips.cc
+++ b/deps/v8/src/mips/code-stubs-mips.cc
@@ -42,8 +42,7 @@ namespace internal {
 
 static void EmitIdenticalObjectComparison(MacroAssembler* masm,
                                           Label* slow,
-                                          Condition cc,
-                                          bool never_nan_nan);
+                                          Condition cc);
 static void EmitSmiNonsmiComparison(MacroAssembler* masm,
                                     Register lhs,
                                     Register rhs,
@@ -627,24 +626,6 @@ void FloatingPointHelper::LoadSmis(MacroAssembler* masm,
 }
 
 
-void FloatingPointHelper::LoadOperands(
-    MacroAssembler* masm,
-    FloatingPointHelper::Destination destination,
-    Register heap_number_map,
-    Register scratch1,
-    Register scratch2,
-    Label* slow) {
-
-  // Load right operand (a0) to f12 or a2/a3.
-  LoadNumber(masm, destination,
-             a0, f14, a2, a3, heap_number_map, scratch1, scratch2, slow);
-
-  // Load left operand (a1) to f14 or a0/a1.
-  LoadNumber(masm, destination,
-             a1, f12, a0, a1, heap_number_map, scratch1, scratch2, slow);
-}
-
-
 void FloatingPointHelper::LoadNumber(MacroAssembler* masm,
                                      Destination destination,
                                      Register object,
@@ -655,11 +636,9 @@ void FloatingPointHelper::LoadNumber(MacroAssembler* masm,
                                      Register scratch1,
                                      Register scratch2,
                                      Label* not_number) {
-  if (FLAG_debug_code) {
-    __ AbortIfNotRootValue(heap_number_map,
-                           Heap::kHeapNumberMapRootIndex,
-                           "HeapNumberMap register clobbered.");
-  }
+  __ AssertRootValue(heap_number_map,
+                     Heap::kHeapNumberMapRootIndex,
+                     "HeapNumberMap register clobbered.");
 
   Label is_smi, done;
 
@@ -721,11 +700,9 @@ void FloatingPointHelper::ConvertNumberToInt32(MacroAssembler* masm,
                                                Register scratch3,
                                                FPURegister double_scratch,
                                                Label* not_number) {
-  if (FLAG_debug_code) {
-    __ AbortIfNotRootValue(heap_number_map,
-                           Heap::kHeapNumberMapRootIndex,
-                           "HeapNumberMap register clobbered.");
-  }
+  __ AssertRootValue(heap_number_map,
+                     Heap::kHeapNumberMapRootIndex,
+                     "HeapNumberMap register clobbered.");
   Label done;
   Label not_in_int32_range;
 
@@ -757,13 +734,13 @@ void FloatingPointHelper::ConvertIntToDouble(MacroAssembler* masm,
                                              Register int_scratch,
                                              Destination destination,
                                              FPURegister double_dst,
-                                             Register dst1,
-                                             Register dst2,
+                                             Register dst_mantissa,
+                                             Register dst_exponent,
                                              Register scratch2,
                                              FPURegister single_scratch) {
   ASSERT(!int_scratch.is(scratch2));
-  ASSERT(!int_scratch.is(dst1));
-  ASSERT(!int_scratch.is(dst2));
+  ASSERT(!int_scratch.is(dst_mantissa));
+  ASSERT(!int_scratch.is(dst_exponent));
 
   Label done;
 
@@ -772,64 +749,65 @@ void FloatingPointHelper::ConvertIntToDouble(MacroAssembler* masm,
     __ mtc1(int_scratch, single_scratch);
     __ cvt_d_w(double_dst, single_scratch);
     if (destination == kCoreRegisters) {
-      __ Move(dst1, dst2, double_dst);
+      __ Move(dst_mantissa, dst_exponent, double_dst);
     }
   } else {
     Label fewer_than_20_useful_bits;
     // Expected output:
-    // |         dst2            |         dst1            |
+    // |       dst_exponent      |       dst_mantissa      |
     // | s |   exp   |              mantissa               |
 
     // Check for zero.
-    __ mov(dst2, int_scratch);
-    __ mov(dst1, int_scratch);
+    __ mov(dst_exponent, int_scratch);
+    __ mov(dst_mantissa, int_scratch);
     __ Branch(&done, eq, int_scratch, Operand(zero_reg));
 
     // Preload the sign of the value.
-    __ And(dst2, int_scratch, Operand(HeapNumber::kSignMask));
+    __ And(dst_exponent, int_scratch, Operand(HeapNumber::kSignMask));
     // Get the absolute value of the object (as an unsigned integer).
     Label skip_sub;
-    __ Branch(&skip_sub, ge, dst2, Operand(zero_reg));
+    __ Branch(&skip_sub, ge, dst_exponent, Operand(zero_reg));
     __ Subu(int_scratch, zero_reg, int_scratch);
     __ bind(&skip_sub);
 
     // Get mantissa[51:20].
 
     // Get the position of the first set bit.
-    __ Clz(dst1, int_scratch);
+    __ Clz(dst_mantissa, int_scratch);
     __ li(scratch2, 31);
-    __ Subu(dst1, scratch2, dst1);
+    __ Subu(dst_mantissa, scratch2, dst_mantissa);
 
     // Set the exponent.
-    __ Addu(scratch2, dst1, Operand(HeapNumber::kExponentBias));
-    __ Ins(dst2, scratch2,
+    __ Addu(scratch2, dst_mantissa, Operand(HeapNumber::kExponentBias));
+    __ Ins(dst_exponent, scratch2,
         HeapNumber::kExponentShift, HeapNumber::kExponentBits);
 
     // Clear the first non null bit.
     __ li(scratch2, Operand(1));
-    __ sllv(scratch2, scratch2, dst1);
+    __ sllv(scratch2, scratch2, dst_mantissa);
     __ li(at, -1);
     __ Xor(scratch2, scratch2, at);
     __ And(int_scratch, int_scratch, scratch2);
 
     // Get the number of bits to set in the lower part of the mantissa.
-    __ Subu(scratch2, dst1, Operand(HeapNumber::kMantissaBitsInTopWord));
+    __ Subu(scratch2, dst_mantissa,
+        Operand(HeapNumber::kMantissaBitsInTopWord));
     __ Branch(&fewer_than_20_useful_bits, lt, scratch2, Operand(zero_reg));
     // Set the higher 20 bits of the mantissa.
     __ srlv(at, int_scratch, scratch2);
-    __ or_(dst2, dst2, at);
+    __ or_(dst_exponent, dst_exponent, at);
     __ li(at, 32);
     __ subu(scratch2, at, scratch2);
-    __ sllv(dst1, int_scratch, scratch2);
+    __ sllv(dst_mantissa, int_scratch, scratch2);
     __ Branch(&done);
 
     __ bind(&fewer_than_20_useful_bits);
     __ li(at, HeapNumber::kMantissaBitsInTopWord);
-    __ subu(scratch2, at, dst1);
+    __ subu(scratch2, at, dst_mantissa);
     __ sllv(scratch2, int_scratch, scratch2);
-    __ Or(dst2, dst2, scratch2);
-    // Set dst1 to 0.
-    __ mov(dst1, zero_reg);
+    __ Or(dst_exponent, dst_exponent, scratch2);
+    // Set dst_mantissa to 0.
+    __ mov(dst_mantissa, zero_reg);
   }
   __ bind(&done);
 }
@@ -839,8 +817,9 @@ void FloatingPointHelper::LoadNumberAsInt32Double(MacroAssembler* masm,
                                                   Register object,
                                                   Destination destination,
                                                   DoubleRegister double_dst,
-                                                  Register dst1,
-                                                  Register dst2,
+                                                  DoubleRegister double_scratch,
+                                                  Register dst_mantissa,
+                                                  Register dst_exponent,
                                                   Register heap_number_map,
                                                   Register scratch1,
                                                   Register scratch2,
@@ -856,16 +835,14 @@ void FloatingPointHelper::LoadNumberAsInt32Double(MacroAssembler* masm,
 
   __ JumpIfNotSmi(object, &obj_is_not_smi);
   __ SmiUntag(scratch1, object);
-  ConvertIntToDouble(masm, scratch1, destination, double_dst, dst1, dst2,
-                     scratch2, single_scratch);
+  ConvertIntToDouble(masm, scratch1, destination, double_dst, dst_mantissa,
+                     dst_exponent, scratch2, single_scratch);
   __ Branch(&done);
 
   __ bind(&obj_is_not_smi);
-  if (FLAG_debug_code) {
-    __ AbortIfNotRootValue(heap_number_map,
-                           Heap::kHeapNumberMapRootIndex,
-                           "HeapNumberMap register clobbered.");
-  }
+  __ AssertRootValue(heap_number_map,
+                     Heap::kHeapNumberMapRootIndex,
+                     "HeapNumberMap register clobbered.");
   __ JumpIfNotHeapNumber(object, heap_number_map, scratch1, not_int32);
 
   // Load the number.
@@ -876,9 +853,10 @@ void FloatingPointHelper::LoadNumberAsInt32Double(MacroAssembler* masm,
 
     Register except_flag = scratch2;
     __ EmitFPUTruncate(kRoundToZero,
-                       single_scratch,
-                       double_dst,
                        scratch1,
+                       double_dst,
+                       at,
+                       double_scratch,
                        except_flag,
                        kCheckForInexactConversion);
 
@@ -886,27 +864,51 @@ void FloatingPointHelper::LoadNumberAsInt32Double(MacroAssembler* masm,
     __ Branch(not_int32, ne, except_flag, Operand(zero_reg));
 
     if (destination == kCoreRegisters) {
-      __ Move(dst1, dst2, double_dst);
+      __ Move(dst_mantissa, dst_exponent, double_dst);
     }
 
   } else {
     ASSERT(!scratch1.is(object) && !scratch2.is(object));
     // Load the double value in the destination registers.
-    __ lw(dst2, FieldMemOperand(object, HeapNumber::kExponentOffset));
-    __ lw(dst1, FieldMemOperand(object, HeapNumber::kMantissaOffset));
+    bool save_registers = object.is(dst_mantissa) || object.is(dst_exponent);
+    if (save_registers) {
+      // Save both output registers, because the other one probably holds
+      // an important value too.
+      __ Push(dst_exponent, dst_mantissa);
+    }
+    __ lw(dst_exponent, FieldMemOperand(object, HeapNumber::kExponentOffset));
+    __ lw(dst_mantissa, FieldMemOperand(object, HeapNumber::kMantissaOffset));
 
     // Check for 0 and -0.
-    __ And(scratch1, dst1, Operand(~HeapNumber::kSignMask));
-    __ Or(scratch1, scratch1, Operand(dst2));
-    __ Branch(&done, eq, scratch1, Operand(zero_reg));
+    Label zero;
+    __ And(scratch1, dst_exponent, Operand(~HeapNumber::kSignMask));
+    __ Or(scratch1, scratch1, Operand(dst_mantissa));
+    __ Branch(&zero, eq, scratch1, Operand(zero_reg));
 
     // Check that the value can be exactly represented by a 32-bit integer.
     // Jump to not_int32 if that's not the case.
-    DoubleIs32BitInteger(masm, dst1, dst2, scratch1, scratch2, not_int32);
+    Label restore_input_and_miss;
+    DoubleIs32BitInteger(masm, dst_exponent, dst_mantissa, scratch1, scratch2,
+                         &restore_input_and_miss);
 
-    // dst1 and dst2 were trashed. Reload the double value.
-    __ lw(dst2, FieldMemOperand(object, HeapNumber::kExponentOffset));
-    __ lw(dst1, FieldMemOperand(object, HeapNumber::kMantissaOffset));
+    // dst_* were trashed. Reload the double value.
+    if (save_registers) {
+      __ Pop(dst_exponent, dst_mantissa);
+    }
+    __ lw(dst_exponent, FieldMemOperand(object, HeapNumber::kExponentOffset));
+    __ lw(dst_mantissa, FieldMemOperand(object, HeapNumber::kMantissaOffset));
+    __ Branch(&done);
+
+    __ bind(&restore_input_and_miss);
+    if (save_registers) {
+      __ Pop(dst_exponent, dst_mantissa);
+    }
+    __ Branch(not_int32);
+
+    __ bind(&zero);
+    if (save_registers) {
+      __ Drop(2);
+    }
   }
 
   __ bind(&done);
@@ -920,7 +922,8 @@ void FloatingPointHelper::LoadNumberAsInt32(MacroAssembler* masm,
                                             Register scratch1,
                                             Register scratch2,
                                             Register scratch3,
-                                            DoubleRegister double_scratch,
+                                            DoubleRegister double_scratch0,
+                                            DoubleRegister double_scratch1,
                                             Label* not_int32) {
   ASSERT(!dst.is(object));
   ASSERT(!scratch1.is(object) && !scratch2.is(object) && !scratch3.is(object));
@@ -928,38 +931,34 @@ void FloatingPointHelper::LoadNumberAsInt32(MacroAssembler* masm,
          !scratch1.is(scratch3) &&
          !scratch2.is(scratch3));
 
-  Label done;
+  Label done, maybe_undefined;
 
   __ UntagAndJumpIfSmi(dst, object, &done);
 
-  if (FLAG_debug_code) {
-    __ AbortIfNotRootValue(heap_number_map,
-                           Heap::kHeapNumberMapRootIndex,
-                           "HeapNumberMap register clobbered.");
-  }
-  __ JumpIfNotHeapNumber(object, heap_number_map, scratch1, not_int32);
+  __ AssertRootValue(heap_number_map,
+                     Heap::kHeapNumberMapRootIndex,
+                     "HeapNumberMap register clobbered.");
+
+  __ JumpIfNotHeapNumber(object, heap_number_map, scratch1, &maybe_undefined);
 
   // Object is a heap number.
   // Convert the floating point value to a 32-bit integer.
   if (CpuFeatures::IsSupported(FPU)) {
     CpuFeatures::Scope scope(FPU);
     // Load the double value.
-    __ ldc1(double_scratch, FieldMemOperand(object, HeapNumber::kValueOffset));
+    __ ldc1(double_scratch0, FieldMemOperand(object, HeapNumber::kValueOffset));
 
-    FPURegister single_scratch = double_scratch.low();
     Register except_flag = scratch2;
     __ EmitFPUTruncate(kRoundToZero,
-                       single_scratch,
-                       double_scratch,
+                       dst,
+                       double_scratch0,
                        scratch1,
+                       double_scratch1,
                        except_flag,
                        kCheckForInexactConversion);
 
     // Jump to not_int32 if the operation did not succeed.
     __ Branch(not_int32, ne, except_flag, Operand(zero_reg));
-    // Get the result in the destination register.
-    __ mfc1(dst, single_scratch);
-
   } else {
     // Load the double value in the destination registers.
     __ lw(scratch2, FieldMemOperand(object, HeapNumber::kExponentOffset));
@@ -991,20 +990,28 @@ void FloatingPointHelper::LoadNumberAsInt32(MacroAssembler* masm,
     __ Subu(dst, zero_reg, dst);
     __ bind(&skip_sub);
   }
+  __ Branch(&done);
+
+  __ bind(&maybe_undefined);
+  __ LoadRoot(at, Heap::kUndefinedValueRootIndex);
+  __ Branch(not_int32, ne, object, Operand(at));
+  // |undefined| is truncated to 0.
+  __ li(dst, Operand(Smi::FromInt(0)));
+  // Fall through.
 
   __ bind(&done);
 }
 
 
 void FloatingPointHelper::DoubleIs32BitInteger(MacroAssembler* masm,
-                                               Register src1,
-                                               Register src2,
+                                               Register src_exponent,
+                                               Register src_mantissa,
                                                Register dst,
                                                Register scratch,
                                                Label* not_int32) {
   // Get exponent alone in scratch.
   __ Ext(scratch,
-         src1,
+         src_exponent,
          HeapNumber::kExponentShift,
          HeapNumber::kExponentBits);
 
@@ -1024,11 +1031,11 @@ void FloatingPointHelper::DoubleIs32BitInteger(MacroAssembler* masm,
   // Another way to put it is that if (exponent - signbit) > 30 then the
   // number cannot be represented as an int32.
   Register tmp = dst;
-  __ srl(at, src1, 31);
+  __ srl(at, src_exponent, 31);
   __ subu(tmp, scratch, at);
   __ Branch(not_int32, gt, tmp, Operand(30));
   // - Bits [21:0] in the mantissa are not null.
-  __ And(tmp, src2, 0x3fffff);
+  __ And(tmp, src_mantissa, 0x3fffff);
   __ Branch(not_int32, ne, tmp, Operand(zero_reg));
 
   // Otherwise the exponent needs to be big enough to shift left all the
@@ -1039,20 +1046,20 @@ void FloatingPointHelper::DoubleIs32BitInteger(MacroAssembler* masm,
 
   // Get the 32 higher bits of the mantissa in dst.
   __ Ext(dst,
-         src2,
+         src_mantissa,
          HeapNumber::kMantissaBitsInTopWord,
          32 - HeapNumber::kMantissaBitsInTopWord);
-  __ sll(at, src1, HeapNumber::kNonMantissaBitsInTopWord);
+  __ sll(at, src_exponent, HeapNumber::kNonMantissaBitsInTopWord);
   __ or_(dst, dst, at);
 
   // Create the mask and test the lower bits (of the higher bits).
   __ li(at, 32);
   __ subu(scratch, at, scratch);
-  __ li(src2, 1);
-  __ sllv(src1, src2, scratch);
-  __ Subu(src1, src1, Operand(1));
-  __ And(src1, dst, src1);
-  __ Branch(not_int32, ne, src1, Operand(zero_reg));
+  __ li(src_mantissa, 1);
+  __ sllv(src_exponent, src_mantissa, scratch);
+  __ Subu(src_exponent, src_exponent, Operand(1));
+  __ And(src_exponent, dst, src_exponent);
+  __ Branch(not_int32, ne, src_exponent, Operand(zero_reg));
 }
 
 
@@ -1191,48 +1198,43 @@ void WriteInt32ToHeapNumberStub::Generate(MacroAssembler* masm) {
 // for "identity and not NaN".
 static void EmitIdenticalObjectComparison(MacroAssembler* masm,
                                           Label* slow,
-                                          Condition cc,
-                                          bool never_nan_nan) {
+                                          Condition cc) {
   Label not_identical;
   Label heap_number, return_equal;
   Register exp_mask_reg = t5;
 
   __ Branch(&not_identical, ne, a0, Operand(a1));
 
-  // The two objects are identical. If we know that one of them isn't NaN then
-  // we now know they test equal.
-  if (cc != eq || !never_nan_nan) {
-    __ li(exp_mask_reg, Operand(HeapNumber::kExponentMask));
-
-    // Test for NaN. Sadly, we can't just compare to factory->nan_value(),
-    // so we do the second best thing - test it ourselves.
-    // They are both equal and they are not both Smis so both of them are not
-    // Smis. If it's not a heap number, then return equal.
-    if (cc == less || cc == greater) {
-      __ GetObjectType(a0, t4, t4);
-      __ Branch(slow, greater, t4, Operand(FIRST_SPEC_OBJECT_TYPE));
-    } else {
-      __ GetObjectType(a0, t4, t4);
-      __ Branch(&heap_number, eq, t4, Operand(HEAP_NUMBER_TYPE));
-      // Comparing JS objects with <=, >= is complicated.
-      if (cc != eq) {
-      __ Branch(slow, greater, t4, Operand(FIRST_SPEC_OBJECT_TYPE));
-        // Normally here we fall through to return_equal, but undefined is
-        // special: (undefined == undefined) == true, but
-        // (undefined <= undefined) == false!  See ECMAScript 11.8.5.
-        if (cc == less_equal || cc == greater_equal) {
-          __ Branch(&return_equal, ne, t4, Operand(ODDBALL_TYPE));
-          __ LoadRoot(t2, Heap::kUndefinedValueRootIndex);
-          __ Branch(&return_equal, ne, a0, Operand(t2));
-          if (cc == le) {
-            // undefined <= undefined should fail.
-            __ li(v0, Operand(GREATER));
-          } else  {
-            // undefined >= undefined should fail.
-            __ li(v0, Operand(LESS));
-          }
-          __ Ret();
+  __ li(exp_mask_reg, Operand(HeapNumber::kExponentMask));
+
+  // Test for NaN. Sadly, we can't just compare to factory->nan_value(),
+  // so we do the second best thing - test it ourselves.
+  // They are both equal and they are not both Smis so both of them are not
+  // Smis. If it's not a heap number, then return equal.
+  if (cc == less || cc == greater) {
+    __ GetObjectType(a0, t4, t4);
+    __ Branch(slow, greater, t4, Operand(FIRST_SPEC_OBJECT_TYPE));
+  } else {
+    __ GetObjectType(a0, t4, t4);
+    __ Branch(&heap_number, eq, t4, Operand(HEAP_NUMBER_TYPE));
+    // Comparing JS objects with <=, >= is complicated.
+    if (cc != eq) {
+    __ Branch(slow, greater, t4, Operand(FIRST_SPEC_OBJECT_TYPE));
+      // Normally here we fall through to return_equal, but undefined is
+      // special: (undefined == undefined) == true, but
+      // (undefined <= undefined) == false!  See ECMAScript 11.8.5.
+      if (cc == less_equal || cc == greater_equal) {
+        __ Branch(&return_equal, ne, t4, Operand(ODDBALL_TYPE));
+        __ LoadRoot(t2, Heap::kUndefinedValueRootIndex);
+        __ Branch(&return_equal, ne, a0, Operand(t2));
+        if (cc == le) {
+          // undefined <= undefined should fail.
+          __ li(v0, Operand(GREATER));
+        } else  {
+          // undefined >= undefined should fail.
+          __ li(v0, Operand(LESS));
         }
+        __ Ret();
       }
     }
   }
@@ -1248,46 +1250,44 @@ static void EmitIdenticalObjectComparison(MacroAssembler* masm,
   }
   __ Ret();
 
-  if (cc != eq || !never_nan_nan) {
-    // For less and greater we don't have to check for NaN since the result of
-    // x < x is false regardless.  For the others here is some code to check
-    // for NaN.
-    if (cc != lt && cc != gt) {
-      __ bind(&heap_number);
-      // It is a heap number, so return non-equal if it's NaN and equal if it's
-      // not NaN.
-
-      // The representation of NaN values has all exponent bits (52..62) set,
-      // and not all mantissa bits (0..51) clear.
-      // Read top bits of double representation (second word of value).
-      __ lw(t2, FieldMemOperand(a0, HeapNumber::kExponentOffset));
-      // Test that exponent bits are all set.
-      __ And(t3, t2, Operand(exp_mask_reg));
-      // If all bits not set (ne cond), then not a NaN, objects are equal.
-      __ Branch(&return_equal, ne, t3, Operand(exp_mask_reg));
-
-      // Shift out flag and all exponent bits, retaining only mantissa.
-      __ sll(t2, t2, HeapNumber::kNonMantissaBitsInTopWord);
-      // Or with all low-bits of mantissa.
-      __ lw(t3, FieldMemOperand(a0, HeapNumber::kMantissaOffset));
-      __ Or(v0, t3, Operand(t2));
-      // For equal we already have the right value in v0:  Return zero (equal)
-      // if all bits in mantissa are zero (it's an Infinity) and non-zero if
-      // not (it's a NaN).  For <= and >= we need to load v0 with the failing
-      // value if it's a NaN.
-      if (cc != eq) {
-        // All-zero means Infinity means equal.
-        __ Ret(eq, v0, Operand(zero_reg));
-        if (cc == le) {
-          __ li(v0, Operand(GREATER));  // NaN <= NaN should fail.
-        } else {
-          __ li(v0, Operand(LESS));     // NaN >= NaN should fail.
-        }
+  // For less and greater we don't have to check for NaN since the result of
+  // x < x is false regardless.  For the others here is some code to check
+  // for NaN.
+  if (cc != lt && cc != gt) {
+    __ bind(&heap_number);
+    // It is a heap number, so return non-equal if it's NaN and equal if it's
+    // not NaN.
+
+    // The representation of NaN values has all exponent bits (52..62) set,
+    // and not all mantissa bits (0..51) clear.
+    // Read top bits of double representation (second word of value).
+    __ lw(t2, FieldMemOperand(a0, HeapNumber::kExponentOffset));
+    // Test that exponent bits are all set.
+    __ And(t3, t2, Operand(exp_mask_reg));
+    // If all bits not set (ne cond), then not a NaN, objects are equal.
+    __ Branch(&return_equal, ne, t3, Operand(exp_mask_reg));
+
+    // Shift out flag and all exponent bits, retaining only mantissa.
+    __ sll(t2, t2, HeapNumber::kNonMantissaBitsInTopWord);
+    // Or with all low-bits of mantissa.
+    __ lw(t3, FieldMemOperand(a0, HeapNumber::kMantissaOffset));
+    __ Or(v0, t3, Operand(t2));
+    // For equal we already have the right value in v0:  Return zero (equal)
+    // if all bits in mantissa are zero (it's an Infinity) and non-zero if
+    // not (it's a NaN).  For <= and >= we need to load v0 with the failing
+    // value if it's a NaN.
+    if (cc != eq) {
+      // All-zero means Infinity means equal.
+      __ Ret(eq, v0, Operand(zero_reg));
+      if (cc == le) {
+        __ li(v0, Operand(GREATER));  // NaN <= NaN should fail.
+      } else {
+        __ li(v0, Operand(LESS));     // NaN >= NaN should fail.
       }
-      __ Ret();
     }
-    // No fall through here.
+    __ Ret();
   }
+  // No fall through here.
 
   __ bind(&not_identical);
 }
@@ -1760,43 +1760,61 @@ void NumberToStringStub::Generate(MacroAssembler* masm) {
 }
 
 
-// On entry lhs_ (lhs) and rhs_ (rhs) are the things to be compared.
-// On exit, v0 is 0, positive, or negative (smi) to indicate the result
-// of the comparison.
-void CompareStub::Generate(MacroAssembler* masm) {
-  Label slow;  // Call builtin.
-  Label not_smis, both_loaded_as_doubles;
+static void ICCompareStub_CheckInputType(MacroAssembler* masm,
+                                         Register input,
+                                         Register scratch,
+                                         CompareIC::State expected,
+                                         Label* fail) {
+  Label ok;
+  if (expected == CompareIC::SMI) {
+    __ JumpIfNotSmi(input, fail);
+  } else if (expected == CompareIC::HEAP_NUMBER) {
+    __ JumpIfSmi(input, &ok);
+    __ CheckMap(input, scratch, Heap::kHeapNumberMapRootIndex, fail,
+                DONT_DO_SMI_CHECK);
+  }
+  // We could be strict about symbol/string here, but as long as
+  // hydrogen doesn't care, the stub doesn't have to care either.
+  __ bind(&ok);
+}
 
 
-  if (include_smi_compare_) {
-    Label not_two_smis, smi_done;
-    __ Or(a2, a1, a0);
-    __ JumpIfNotSmi(a2, &not_two_smis);
-    __ sra(a1, a1, 1);
-    __ sra(a0, a0, 1);
-    __ Ret(USE_DELAY_SLOT);
-    __ subu(v0, a1, a0);
-    __ bind(&not_two_smis);
-  } else if (FLAG_debug_code) {
-    __ Or(a2, a1, a0);
-    __ And(a2, a2, kSmiTagMask);
-    __ Assert(ne, "CompareStub: unexpected smi operands.",
-        a2, Operand(zero_reg));
-  }
+// On entry a1 and a2 are the values to be compared.
+// On exit a0 is 0, positive or negative to indicate the result of
+// the comparison.
+void ICCompareStub::GenerateGeneric(MacroAssembler* masm) {
+  Register lhs = a1;
+  Register rhs = a0;
+  Condition cc = GetCondition();
 
+  Label miss;
+  ICCompareStub_CheckInputType(masm, lhs, a2, left_, &miss);
+  ICCompareStub_CheckInputType(masm, rhs, a3, right_, &miss);
+
+  Label slow;  // Call builtin.
+  Label not_smis, both_loaded_as_doubles;
+
+  Label not_two_smis, smi_done;
+  __ Or(a2, a1, a0);
+  __ JumpIfNotSmi(a2, &not_two_smis);
+  __ sra(a1, a1, 1);
+  __ sra(a0, a0, 1);
+  __ Ret(USE_DELAY_SLOT);
+  __ subu(v0, a1, a0);
+  __ bind(&not_two_smis);
 
   // NOTICE! This code is only reached after a smi-fast-case check, so
   // it is certain that at least one operand isn't a smi.
 
   // Handle the case where the objects are identical.  Either returns the answer
   // or goes to slow.  Only falls through if the objects were not identical.
-  EmitIdenticalObjectComparison(masm, &slow, cc_, never_nan_nan_);
+  EmitIdenticalObjectComparison(masm, &slow, cc);
 
   // If either is a Smi (we know that not both are), then they can only
   // be strictly equal if the other is a HeapNumber.
   STATIC_ASSERT(kSmiTag == 0);
   ASSERT_EQ(0, Smi::FromInt(0));
-  __ And(t2, lhs_, Operand(rhs_));
+  __ And(t2, lhs, Operand(rhs));
   __ JumpIfNotSmi(t2, &not_smis, t0);
   // One operand is a smi. EmitSmiNonsmiComparison generates code that can:
   // 1) Return the answer.
@@ -1806,8 +1824,8 @@ void CompareStub::Generate(MacroAssembler* masm) {
   // In cases 3 and 4 we have found out we were dealing with a number-number
   // comparison and the numbers have been loaded into f12 and f14 as doubles,
   // or in GP registers (a0, a1, a2, a3) depending on the presence of the FPU.
-  EmitSmiNonsmiComparison(masm, lhs_, rhs_,
-                          &both_loaded_as_doubles, &slow, strict_);
+  EmitSmiNonsmiComparison(masm, lhs, rhs,
+                          &both_loaded_as_doubles, &slow, strict());
 
   __ bind(&both_loaded_as_doubles);
   // f12, f14 are the double representations of the left hand side
@@ -1843,7 +1861,7 @@ void CompareStub::Generate(MacroAssembler* masm) {
     __ bind(&nan);
     // NaN comparisons always fail.
     // Load whatever we need in v0 to make the comparison fail.
-    if (cc_ == lt || cc_ == le) {
+    if (cc == lt || cc == le) {
       __ li(v0, Operand(GREATER));
     } else {
       __ li(v0, Operand(LESS));
@@ -1852,20 +1870,20 @@ void CompareStub::Generate(MacroAssembler* masm) {
   } else {
     // Checks for NaN in the doubles we have loaded.  Can return the answer or
     // fall through if neither is a NaN.  Also binds rhs_not_nan.
-    EmitNanCheck(masm, cc_);
+    EmitNanCheck(masm, cc);
 
     // Compares two doubles that are not NaNs. Returns the answer.
     // Never falls through.
-    EmitTwoNonNanDoubleComparison(masm, cc_);
+    EmitTwoNonNanDoubleComparison(masm, cc);
   }
 
   __ bind(&not_smis);
   // At this point we know we are dealing with two different objects,
   // and neither of them is a Smi. The objects are in lhs_ and rhs_.
-  if (strict_) {
+  if (strict()) {
     // This returns non-equal for some object types, or falls through if it
     // was not lucky.
-    EmitStrictTwoHeapObjectCompare(masm, lhs_, rhs_);
+    EmitStrictTwoHeapObjectCompare(masm, lhs, rhs);
   }
 
   Label check_for_symbols;
@@ -1875,38 +1893,38 @@ void CompareStub::Generate(MacroAssembler* masm) {
   // that case. If the inputs are not doubles then jumps to check_for_symbols.
   // In this case a2 will contain the type of lhs_.
   EmitCheckForTwoHeapNumbers(masm,
-                             lhs_,
-                             rhs_,
+                             lhs,
+                             rhs,
                              &both_loaded_as_doubles,
                              &check_for_symbols,
                              &flat_string_check);
 
   __ bind(&check_for_symbols);
-  if (cc_ == eq && !strict_) {
+  if (cc == eq && !strict()) {
     // Returns an answer for two symbols or two detectable objects.
     // Otherwise jumps to string case or not both strings case.
     // Assumes that a2 is the type of lhs_ on entry.
-    EmitCheckForSymbolsOrObjects(masm, lhs_, rhs_, &flat_string_check, &slow);
+    EmitCheckForSymbolsOrObjects(masm, lhs, rhs, &flat_string_check, &slow);
   }
 
   // Check for both being sequential ASCII strings, and inline if that is the
   // case.
   __ bind(&flat_string_check);
 
-  __ JumpIfNonSmisNotBothSequentialAsciiStrings(lhs_, rhs_, a2, a3, &slow);
+  __ JumpIfNonSmisNotBothSequentialAsciiStrings(lhs, rhs, a2, a3, &slow);
 
   __ IncrementCounter(isolate->counters()->string_compare_native(), 1, a2, a3);
-  if (cc_ == eq) {
+  if (cc == eq) {
     StringCompareStub::GenerateFlatAsciiStringEquals(masm,
-                                                     lhs_,
-                                                     rhs_,
+                                                     lhs,
+                                                     rhs,
                                                      a2,
                                                      a3,
                                                      t0);
   } else {
     StringCompareStub::GenerateCompareFlatAsciiStrings(masm,
-                                                       lhs_,
-                                                       rhs_,
+                                                       lhs,
+                                                       rhs,
                                                        a2,
                                                        a3,
                                                        t0,
@@ -1917,18 +1935,18 @@ void CompareStub::Generate(MacroAssembler* masm) {
   __ bind(&slow);
   // Prepare for call to builtin. Push object pointers, a0 (lhs) first,
   // a1 (rhs) second.
-  __ Push(lhs_, rhs_);
+  __ Push(lhs, rhs);
   // Figure out which native to call and setup the arguments.
   Builtins::JavaScript native;
-  if (cc_ == eq) {
-    native = strict_ ? Builtins::STRICT_EQUALS : Builtins::EQUALS;
+  if (cc == eq) {
+    native = strict() ? Builtins::STRICT_EQUALS : Builtins::EQUALS;
   } else {
     native = Builtins::COMPARE;
     int ncr;  // NaN compare result.
-    if (cc_ == lt || cc_ == le) {
+    if (cc == lt || cc == le) {
       ncr = GREATER;
     } else {
-      ASSERT(cc_ == gt || cc_ == ge);  // Remaining cases.
+      ASSERT(cc == gt || cc == ge);  // Remaining cases.
       ncr = LESS;
     }
     __ li(a0, Operand(Smi::FromInt(ncr)));
@@ -1938,6 +1956,9 @@ void CompareStub::Generate(MacroAssembler* masm) {
   // Call the native; it returns -1 (less), 0 (equal), or 1 (greater)
   // tagged as a small integer.
   __ InvokeBuiltin(native, JUMP_FUNCTION);
+
+  __ bind(&miss);
+  GenerateMiss(masm);
 }
 
 
@@ -2378,20 +2399,23 @@ void UnaryOpStub::GenerateGenericCodeFallback(
 }
 
 
+void BinaryOpStub::Initialize() {
+  platform_specific_bit_ = CpuFeatures::IsSupported(FPU);
+}
+
+
 void BinaryOpStub::GenerateTypeTransition(MacroAssembler* masm) {
   Label get_result;
 
   __ Push(a1, a0);
 
   __ li(a2, Operand(Smi::FromInt(MinorKey())));
-  __ li(a1, Operand(Smi::FromInt(op_)));
-  __ li(a0, Operand(Smi::FromInt(operands_type_)));
-  __ Push(a2, a1, a0);
+  __ push(a2);
 
   __ TailCallExternalReference(
       ExternalReference(IC_Utility(IC::kBinaryOp_Patch),
                         masm->isolate()),
-      5,
+      3,
       1);
 }
 
@@ -2402,59 +2426,8 @@ void BinaryOpStub::GenerateTypeTransitionWithSavedArgs(
 }
 
 
-void BinaryOpStub::Generate(MacroAssembler* masm) {
-  // Explicitly allow generation of nested stubs. It is safe here because
-  // generation code does not use any raw pointers.
-  AllowStubCallsScope allow_stub_calls(masm, true);
-  switch (operands_type_) {
-    case BinaryOpIC::UNINITIALIZED:
-      GenerateTypeTransition(masm);
-      break;
-    case BinaryOpIC::SMI:
-      GenerateSmiStub(masm);
-      break;
-    case BinaryOpIC::INT32:
-      GenerateInt32Stub(masm);
-      break;
-    case BinaryOpIC::HEAP_NUMBER:
-      GenerateHeapNumberStub(masm);
-      break;
-    case BinaryOpIC::ODDBALL:
-      GenerateOddballStub(masm);
-      break;
-    case BinaryOpIC::BOTH_STRING:
-      GenerateBothStringStub(masm);
-      break;
-    case BinaryOpIC::STRING:
-      GenerateStringStub(masm);
-      break;
-    case BinaryOpIC::GENERIC:
-      GenerateGeneric(masm);
-      break;
-    default:
-      UNREACHABLE();
-  }
-}
-
-
-void BinaryOpStub::PrintName(StringStream* stream) {
-  const char* op_name = Token::Name(op_);
-  const char* overwrite_name;
-  switch (mode_) {
-    case NO_OVERWRITE: overwrite_name = "Alloc"; break;
-    case OVERWRITE_RIGHT: overwrite_name = "OverwriteRight"; break;
-    case OVERWRITE_LEFT: overwrite_name = "OverwriteLeft"; break;
-    default: overwrite_name = "UnknownOverwrite"; break;
-  }
-  stream->Add("BinaryOpStub_%s_%s_%s",
-              op_name,
-              overwrite_name,
-              BinaryOpIC::GetName(operands_type_));
-}
-
-
-
-void BinaryOpStub::GenerateSmiSmiOperation(MacroAssembler* masm) {
+void BinaryOpStub_GenerateSmiSmiOperation(MacroAssembler* masm,
+                                          Token::Value op) {
   Register left = a1;
   Register right = a0;
 
@@ -2465,7 +2438,7 @@ void BinaryOpStub::GenerateSmiSmiOperation(MacroAssembler* masm) {
   STATIC_ASSERT(kSmiTag == 0);
 
   Label not_smi_result;
-  switch (op_) {
+  switch (op) {
     case Token::ADD:
       __ AdduAndCheckForOverflow(v0, left, right, scratch1);
       __ RetOnNoOverflow(scratch1);
@@ -2608,10 +2581,24 @@ void BinaryOpStub::GenerateSmiSmiOperation(MacroAssembler* masm) {
 }
 
 
-void BinaryOpStub::GenerateFPOperation(MacroAssembler* masm,
-                                       bool smi_operands,
-                                       Label* not_numbers,
-                                       Label* gc_required) {
+void BinaryOpStub_GenerateHeapResultAllocation(MacroAssembler* masm,
+                                               Register result,
+                                               Register heap_number_map,
+                                               Register scratch1,
+                                               Register scratch2,
+                                               Label* gc_required,
+                                               OverwriteMode mode);
+
+
+void BinaryOpStub_GenerateFPOperation(MacroAssembler* masm,
+                                      BinaryOpIC::TypeInfo left_type,
+                                      BinaryOpIC::TypeInfo right_type,
+                                      bool smi_operands,
+                                      Label* not_numbers,
+                                      Label* gc_required,
+                                      Label* miss,
+                                      Token::Value op,
+                                      OverwriteMode mode) {
   Register left = a1;
   Register right = a0;
   Register scratch1 = t3;
@@ -2619,15 +2606,21 @@ void BinaryOpStub::GenerateFPOperation(MacroAssembler* masm,
   Register scratch3 = t0;
 
   ASSERT(smi_operands || (not_numbers != NULL));
-  if (smi_operands && FLAG_debug_code) {
-    __ AbortIfNotSmi(left);
-    __ AbortIfNotSmi(right);
+  if (smi_operands) {
+    __ AssertSmi(left);
+    __ AssertSmi(right);
+  }
+  if (left_type == BinaryOpIC::SMI) {
+    __ JumpIfNotSmi(left, miss);
+  }
+  if (right_type == BinaryOpIC::SMI) {
+    __ JumpIfNotSmi(right, miss);
   }
 
   Register heap_number_map = t2;
   __ LoadRoot(heap_number_map, Heap::kHeapNumberMapRootIndex);
 
-  switch (op_) {
+  switch (op) {
     case Token::ADD:
     case Token::SUB:
     case Token::MUL:
@@ -2637,25 +2630,44 @@ void BinaryOpStub::GenerateFPOperation(MacroAssembler* masm,
       // depending on whether FPU is available or not.
       FloatingPointHelper::Destination destination =
           CpuFeatures::IsSupported(FPU) &&
-          op_ != Token::MOD ?
+          op != Token::MOD ?
               FloatingPointHelper::kFPURegisters :
               FloatingPointHelper::kCoreRegisters;
 
       // Allocate new heap number for result.
       Register result = s0;
-      GenerateHeapResultAllocation(
-          masm, result, heap_number_map, scratch1, scratch2, gc_required);
+      BinaryOpStub_GenerateHeapResultAllocation(
+          masm, result, heap_number_map, scratch1, scratch2, gc_required, mode);
 
       // Load the operands.
       if (smi_operands) {
         FloatingPointHelper::LoadSmis(masm, destination, scratch1, scratch2);
       } else {
-        FloatingPointHelper::LoadOperands(masm,
-                                          destination,
-                                          heap_number_map,
-                                          scratch1,
-                                          scratch2,
-                                          not_numbers);
+        // Load right operand to f14 or a2/a3.
+        if (right_type == BinaryOpIC::INT32) {
+          FloatingPointHelper::LoadNumberAsInt32Double(
+              masm, right, destination, f14, f16, a2, a3, heap_number_map,
+              scratch1, scratch2, f2, miss);
+        } else {
+          Label* fail = (right_type == BinaryOpIC::HEAP_NUMBER) ? miss
+                                                                : not_numbers;
+          FloatingPointHelper::LoadNumber(
+              masm, destination, right, f14, a2, a3, heap_number_map,
+              scratch1, scratch2, fail);
+        }
+        // Load left operand to f12 or a0/a1. This keeps a0/a1 intact if it
+        // jumps to |miss|.
+        if (left_type == BinaryOpIC::INT32) {
+          FloatingPointHelper::LoadNumberAsInt32Double(
+              masm, left, destination, f12, f16, a0, a1, heap_number_map,
+              scratch1, scratch2, f2, miss);
+        } else {
+          Label* fail = (left_type == BinaryOpIC::HEAP_NUMBER) ? miss
+                                                               : not_numbers;
+          FloatingPointHelper::LoadNumber(
+              masm, destination, left, f12, a0, a1, heap_number_map,
+              scratch1, scratch2, fail);
+        }
       }
 
       // Calculate the result.
@@ -2664,7 +2676,7 @@ void BinaryOpStub::GenerateFPOperation(MacroAssembler* masm,
         // f12: Left value.
         // f14: Right value.
         CpuFeatures::Scope scope(FPU);
-        switch (op_) {
+        switch (op) {
         case Token::ADD:
           __ add_d(f10, f12, f14);
           break;
@@ -2690,7 +2702,7 @@ void BinaryOpStub::GenerateFPOperation(MacroAssembler* masm,
       } else {
         // Call the C function to handle the double operation.
         FloatingPointHelper::CallCCodeForDoubleOperation(masm,
-                                                         op_,
+                                                         op,
                                                          result,
                                                          scratch1);
         if (FLAG_debug_code) {
@@ -2730,7 +2742,7 @@ void BinaryOpStub::GenerateFPOperation(MacroAssembler* masm,
                                                   not_numbers);
       }
       Label result_not_a_smi;
-      switch (op_) {
+      switch (op) {
         case Token::BIT_OR:
           __ Or(a2, a3, Operand(a2));
           break;
@@ -2780,8 +2792,9 @@ void BinaryOpStub::GenerateFPOperation(MacroAssembler* masm,
         __ AllocateHeapNumber(
             result, scratch1, scratch2, heap_number_map, gc_required);
       } else {
-        GenerateHeapResultAllocation(
-            masm, result, heap_number_map, scratch1, scratch2, gc_required);
+        BinaryOpStub_GenerateHeapResultAllocation(
+            masm, result, heap_number_map, scratch1, scratch2, gc_required,
+            mode);
       }
 
       // a2: Answer as signed int32.
@@ -2796,7 +2809,7 @@ void BinaryOpStub::GenerateFPOperation(MacroAssembler* masm,
         // mentioned above SHR needs to always produce a positive result.
         CpuFeatures::Scope scope(FPU);
         __ mtc1(a2, f0);
-        if (op_ == Token::SHR) {
+        if (op == Token::SHR) {
           __ Cvt_d_uw(f0, f0, f22);
         } else {
           __ cvt_d_w(f0, f0);
@@ -2823,12 +2836,14 @@ void BinaryOpStub::GenerateFPOperation(MacroAssembler* masm,
 // Generate the smi code. If the operation on smis are successful this return is
 // generated. If the result is not a smi and heap number allocation is not
 // requested the code falls through. If number allocation is requested but a
-// heap number cannot be allocated the code jumps to the lable gc_required.
-void BinaryOpStub::GenerateSmiCode(
+// heap number cannot be allocated the code jumps to the label gc_required.
+void BinaryOpStub_GenerateSmiCode(
     MacroAssembler* masm,
     Label* use_runtime,
     Label* gc_required,
-    SmiCodeGenerateHeapNumberResults allow_heapnumber_results) {
+    Token::Value op,
+    BinaryOpStub::SmiCodeGenerateHeapNumberResults allow_heapnumber_results,
+    OverwriteMode mode) {
   Label not_smis;
 
   Register left = a1;
@@ -2841,12 +2856,14 @@ void BinaryOpStub::GenerateSmiCode(
   __ JumpIfNotSmi(scratch1, &not_smis);
 
   // If the smi-smi operation results in a smi return is generated.
-  GenerateSmiSmiOperation(masm);
+  BinaryOpStub_GenerateSmiSmiOperation(masm, op);
 
   // If heap number results are possible generate the result in an allocated
   // heap number.
-  if (allow_heapnumber_results == ALLOW_HEAPNUMBER_RESULTS) {
-    GenerateFPOperation(masm, true, use_runtime, gc_required);
+  if (allow_heapnumber_results == BinaryOpStub::ALLOW_HEAPNUMBER_RESULTS) {
+    BinaryOpStub_GenerateFPOperation(
+        masm, BinaryOpIC::UNINITIALIZED, BinaryOpIC::UNINITIALIZED, true,
+        use_runtime, gc_required, &not_smis, op, mode);
   }
   __ bind(&not_smis);
 }
@@ -2858,14 +2875,14 @@ void BinaryOpStub::GenerateSmiStub(MacroAssembler* masm) {
   if (result_type_ == BinaryOpIC::UNINITIALIZED ||
       result_type_ == BinaryOpIC::SMI) {
     // Only allow smi results.
-    GenerateSmiCode(masm, &call_runtime, NULL, NO_HEAPNUMBER_RESULTS);
+    BinaryOpStub_GenerateSmiCode(
+        masm, &call_runtime, NULL, op_, NO_HEAPNUMBER_RESULTS, mode_);
   } else {
     // Allow heap number result and don't make a transition if a heap number
     // cannot be allocated.
-    GenerateSmiCode(masm,
-                    &call_runtime,
-                    &call_runtime,
-                    ALLOW_HEAPNUMBER_RESULTS);
+    BinaryOpStub_GenerateSmiCode(
+        masm, &call_runtime, &call_runtime, op_, ALLOW_HEAPNUMBER_RESULTS,
+        mode_);
   }
 
   // Code falls through if the result is not returned as either a smi or heap
@@ -2873,22 +2890,14 @@ void BinaryOpStub::GenerateSmiStub(MacroAssembler* masm) {
   GenerateTypeTransition(masm);
 
   __ bind(&call_runtime);
+  GenerateRegisterArgsPush(masm);
   GenerateCallRuntime(masm);
 }
 
 
-void BinaryOpStub::GenerateStringStub(MacroAssembler* masm) {
-  ASSERT(operands_type_ == BinaryOpIC::STRING);
-  // Try to add arguments as strings, otherwise, transition to the generic
-  // BinaryOpIC type.
-  GenerateAddStrings(masm);
-  GenerateTypeTransition(masm);
-}
-
-
 void BinaryOpStub::GenerateBothStringStub(MacroAssembler* masm) {
   Label call_runtime;
-  ASSERT(operands_type_ == BinaryOpIC::BOTH_STRING);
+  ASSERT(left_type_ == BinaryOpIC::STRING && right_type_ == BinaryOpIC::STRING);
   ASSERT(op_ == Token::ADD);
   // If both arguments are strings, call the string add stub.
   // Otherwise, do a transition.
@@ -2917,7 +2926,7 @@ void BinaryOpStub::GenerateBothStringStub(MacroAssembler* masm) {
 
 
 void BinaryOpStub::GenerateInt32Stub(MacroAssembler* masm) {
-  ASSERT(operands_type_ == BinaryOpIC::INT32);
+  ASSERT(Max(left_type_, right_type_) == BinaryOpIC::INT32);
 
   Register left = a1;
   Register right = a0;
@@ -2940,7 +2949,7 @@ void BinaryOpStub::GenerateInt32Stub(MacroAssembler* masm) {
   Label skip;
   __ Or(scratch1, left, right);
   __ JumpIfNotSmi(scratch1, &skip);
-  GenerateSmiSmiOperation(masm);
+  BinaryOpStub_GenerateSmiSmiOperation(masm, op_);
   // Fall through if the result is not a smi.
   __ bind(&skip);
 
@@ -2950,6 +2959,15 @@ void BinaryOpStub::GenerateInt32Stub(MacroAssembler* masm) {
     case Token::MUL:
     case Token::DIV:
     case Token::MOD: {
+      // It could be that only SMIs have been seen at either the left
+      // or the right operand. For precise type feedback, patch the IC
+      // again if this changes.
+      if (left_type_ == BinaryOpIC::SMI) {
+        __ JumpIfNotSmi(left, &transition);
+      }
+      if (right_type_ == BinaryOpIC::SMI) {
+        __ JumpIfNotSmi(right, &transition);
+      }
       // Load both operands and check that they are 32-bit integer.
       // Jump to type transition if they are not. The registers a0 and a1 (right
       // and left) are preserved for the runtime call.
@@ -2962,6 +2980,7 @@ void BinaryOpStub::GenerateInt32Stub(MacroAssembler* masm) {
                                                    right,
                                                    destination,
                                                    f14,
+                                                   f16,
                                                    a2,
                                                    a3,
                                                    heap_number_map,
@@ -2973,6 +2992,7 @@ void BinaryOpStub::GenerateInt32Stub(MacroAssembler* masm) {
                                                    left,
                                                    destination,
                                                    f12,
+                                                   f16,
                                                    t0,
                                                    t1,
                                                    heap_number_map,
@@ -3009,9 +3029,10 @@ void BinaryOpStub::GenerateInt32Stub(MacroAssembler* masm) {
 
           Register except_flag = scratch2;
           __ EmitFPUTruncate(kRoundToZero,
-                             single_scratch,
-                             f10,
                              scratch1,
+                             f10,
+                             at,
+                             f16,
                              except_flag);
 
           if (result_type_ <= BinaryOpIC::INT32) {
@@ -3020,7 +3041,6 @@ void BinaryOpStub::GenerateInt32Stub(MacroAssembler* masm) {
           }
 
           // Check if the result fits in a smi.
-          __ mfc1(scratch1, single_scratch);
           __ Addu(scratch2, scratch1, Operand(0x40000000));
           // If not try to return a heap number.
           __ Branch(&return_heap_number, lt, scratch2, Operand(zero_reg));
@@ -3046,12 +3066,13 @@ void BinaryOpStub::GenerateInt32Stub(MacroAssembler* masm) {
                                                  : BinaryOpIC::INT32)) {
           // We are using FPU registers so s0 is available.
           heap_number_result = s0;
-          GenerateHeapResultAllocation(masm,
-                                       heap_number_result,
-                                       heap_number_map,
-                                       scratch1,
-                                       scratch2,
-                                       &call_runtime);
+          BinaryOpStub_GenerateHeapResultAllocation(masm,
+                                                    heap_number_result,
+                                                    heap_number_map,
+                                                    scratch1,
+                                                    scratch2,
+                                                    &call_runtime,
+                                                    mode_);
           __ mov(v0, heap_number_result);
           __ sdc1(f10, FieldMemOperand(v0, HeapNumber::kValueOffset));
           __ Ret();
@@ -3069,12 +3090,13 @@ void BinaryOpStub::GenerateInt32Stub(MacroAssembler* masm) {
 
         // Allocate a heap number to store the result.
         heap_number_result = s0;
-        GenerateHeapResultAllocation(masm,
-                                     heap_number_result,
-                                     heap_number_map,
-                                     scratch1,
-                                     scratch2,
-                                     &pop_and_call_runtime);
+        BinaryOpStub_GenerateHeapResultAllocation(masm,
+                                                  heap_number_result,
+                                                  heap_number_map,
+                                                  scratch1,
+                                                  scratch2,
+                                                  &pop_and_call_runtime,
+                                                  mode_);
 
         // Load the left value from the value saved on the stack.
         __ Pop(a1, a0);
@@ -3113,6 +3135,7 @@ void BinaryOpStub::GenerateInt32Stub(MacroAssembler* masm) {
                                              scratch2,
                                              scratch3,
                                              f0,
+                                             f2,
                                              &transition);
       FloatingPointHelper::LoadNumberAsInt32(masm,
                                              right,
@@ -3122,6 +3145,7 @@ void BinaryOpStub::GenerateInt32Stub(MacroAssembler* masm) {
                                              scratch2,
                                              scratch3,
                                              f0,
+                                             f2,
                                              &transition);
 
       // The ECMA-262 standard specifies that, for shift operations, only the
@@ -3183,12 +3207,13 @@ void BinaryOpStub::GenerateInt32Stub(MacroAssembler* masm) {
 
       __ bind(&return_heap_number);
       heap_number_result = t1;
-      GenerateHeapResultAllocation(masm,
-                                   heap_number_result,
-                                   heap_number_map,
-                                   scratch1,
-                                   scratch2,
-                                   &call_runtime);
+      BinaryOpStub_GenerateHeapResultAllocation(masm,
+                                                heap_number_result,
+                                                heap_number_map,
+                                                scratch1,
+                                                scratch2,
+                                                &call_runtime,
+                                                mode_);
 
       if (CpuFeatures::IsSupported(FPU)) {
         CpuFeatures::Scope scope(FPU);
@@ -3232,6 +3257,7 @@ void BinaryOpStub::GenerateInt32Stub(MacroAssembler* masm) {
   }
 
   __ bind(&call_runtime);
+  GenerateRegisterArgsPush(masm);
   GenerateCallRuntime(masm);
 }
 
@@ -3270,20 +3296,32 @@ void BinaryOpStub::GenerateOddballStub(MacroAssembler* masm) {
 
 
 void BinaryOpStub::GenerateHeapNumberStub(MacroAssembler* masm) {
-  Label call_runtime;
-  GenerateFPOperation(masm, false, &call_runtime, &call_runtime);
+  Label call_runtime, transition;
+  BinaryOpStub_GenerateFPOperation(
+      masm, left_type_, right_type_, false,
+      &transition, &call_runtime, &transition, op_, mode_);
+
+  __ bind(&transition);
+  GenerateTypeTransition(masm);
 
   __ bind(&call_runtime);
+  GenerateRegisterArgsPush(masm);
   GenerateCallRuntime(masm);
 }
 
 
 void BinaryOpStub::GenerateGeneric(MacroAssembler* masm) {
-  Label call_runtime, call_string_add_or_runtime;
+  Label call_runtime, call_string_add_or_runtime, transition;
 
-  GenerateSmiCode(masm, &call_runtime, &call_runtime, ALLOW_HEAPNUMBER_RESULTS);
+  BinaryOpStub_GenerateSmiCode(
+      masm, &call_runtime, &call_runtime, op_, ALLOW_HEAPNUMBER_RESULTS, mode_);
 
-  GenerateFPOperation(masm, false, &call_string_add_or_runtime, &call_runtime);
+  BinaryOpStub_GenerateFPOperation(
+      masm, left_type_, right_type_, false,
+      &call_string_add_or_runtime, &call_runtime, &transition, op_, mode_);
+
+  __ bind(&transition);
+  GenerateTypeTransition(masm);
 
   __ bind(&call_string_add_or_runtime);
   if (op_ == Token::ADD) {
@@ -3291,6 +3329,7 @@ void BinaryOpStub::GenerateGeneric(MacroAssembler* masm) {
   }
 
   __ bind(&call_runtime);
+  GenerateRegisterArgsPush(masm);
   GenerateCallRuntime(masm);
 }
 
@@ -3326,63 +3365,20 @@ void BinaryOpStub::GenerateAddStrings(MacroAssembler* masm) {
 }
 
 
-void BinaryOpStub::GenerateCallRuntime(MacroAssembler* masm) {
-  GenerateRegisterArgsPush(masm);
-  switch (op_) {
-    case Token::ADD:
-      __ InvokeBuiltin(Builtins::ADD, JUMP_FUNCTION);
-      break;
-    case Token::SUB:
-      __ InvokeBuiltin(Builtins::SUB, JUMP_FUNCTION);
-      break;
-    case Token::MUL:
-      __ InvokeBuiltin(Builtins::MUL, JUMP_FUNCTION);
-      break;
-    case Token::DIV:
-      __ InvokeBuiltin(Builtins::DIV, JUMP_FUNCTION);
-      break;
-    case Token::MOD:
-      __ InvokeBuiltin(Builtins::MOD, JUMP_FUNCTION);
-      break;
-    case Token::BIT_OR:
-      __ InvokeBuiltin(Builtins::BIT_OR, JUMP_FUNCTION);
-      break;
-    case Token::BIT_AND:
-      __ InvokeBuiltin(Builtins::BIT_AND, JUMP_FUNCTION);
-      break;
-    case Token::BIT_XOR:
-      __ InvokeBuiltin(Builtins::BIT_XOR, JUMP_FUNCTION);
-      break;
-    case Token::SAR:
-      __ InvokeBuiltin(Builtins::SAR, JUMP_FUNCTION);
-      break;
-    case Token::SHR:
-      __ InvokeBuiltin(Builtins::SHR, JUMP_FUNCTION);
-      break;
-    case Token::SHL:
-      __ InvokeBuiltin(Builtins::SHL, JUMP_FUNCTION);
-      break;
-    default:
-      UNREACHABLE();
-  }
-}
-
-
-void BinaryOpStub::GenerateHeapResultAllocation(
-    MacroAssembler* masm,
-    Register result,
-    Register heap_number_map,
-    Register scratch1,
-    Register scratch2,
-    Label* gc_required) {
-
+void BinaryOpStub_GenerateHeapResultAllocation(MacroAssembler* masm,
+                                               Register result,
+                                               Register heap_number_map,
+                                               Register scratch1,
+                                               Register scratch2,
+                                               Label* gc_required,
+                                               OverwriteMode mode) {
   // Code below will scratch result if allocation fails. To keep both arguments
   // intact for the runtime call result cannot be one of these.
   ASSERT(!result.is(a0) && !result.is(a1));
 
-  if (mode_ == OVERWRITE_LEFT || mode_ == OVERWRITE_RIGHT) {
+  if (mode == OVERWRITE_LEFT || mode == OVERWRITE_RIGHT) {
     Label skip_allocation, allocated;
-    Register overwritable_operand = mode_ == OVERWRITE_LEFT ? a1 : a0;
+    Register overwritable_operand = mode == OVERWRITE_LEFT ? a1 : a0;
     // If the overwritable operand is already an object, we skip the
     // allocation of a heap number.
     __ JumpIfNotSmi(overwritable_operand, &skip_allocation);
@@ -3395,7 +3391,7 @@ void BinaryOpStub::GenerateHeapResultAllocation(
     __ mov(result, overwritable_operand);
     __ bind(&allocated);
   } else {
-    ASSERT(mode_ == NO_OVERWRITE);
+    ASSERT(mode == NO_OVERWRITE);
     __ AllocateHeapNumber(
         result, scratch1, scratch2, heap_number_map, gc_required);
   }
@@ -3716,9 +3712,10 @@ void MathPowStub::Generate(MacroAssembler* masm) {
     Label int_exponent_convert;
     // Detect integer exponents stored as double.
     __ EmitFPUTruncate(kRoundToMinusInf,
-                       single_scratch,
-                       double_exponent,
                        scratch,
+                       double_exponent,
+                       at,
+                       double_scratch,
                        scratch2,
                        kCheckForInexactConversion);
     // scratch2 == 0 means there was no conversion error.
@@ -3776,7 +3773,7 @@ void MathPowStub::Generate(MacroAssembler* masm) {
     __ push(ra);
     {
       AllowExternalCallThatCantCauseGC scope(masm);
-      __ PrepareCallCFunction(0, 2, scratch);
+      __ PrepareCallCFunction(0, 2, scratch2);
       __ SetCallCDoubleArguments(double_base, double_exponent);
       __ CallCFunction(
           ExternalReference::power_double_double_function(masm->isolate()),
@@ -3787,7 +3784,6 @@ void MathPowStub::Generate(MacroAssembler* masm) {
     __ jmp(&done);
 
     __ bind(&int_exponent_convert);
-    __ mfc1(scratch, single_scratch);
   }
 
   // Calculate power with integer exponent.
@@ -5091,7 +5087,7 @@ void RegExpExecStub::Generate(MacroAssembler* masm) {
   // regexp_data: RegExp data (FixedArray)
   // a0: Instance type of subject string
   STATIC_ASSERT(kStringEncodingMask == 4);
-  STATIC_ASSERT(kAsciiStringTag == 4);
+  STATIC_ASSERT(kOneByteStringTag == 4);
   STATIC_ASSERT(kTwoByteStringTag == 0);
   // Find the code object based on the assumptions above.
   __ And(a0, a0, Operand(kStringEncodingMask));  // Non-zero for ASCII.
@@ -5330,7 +5326,7 @@ void RegExpExecStub::Generate(MacroAssembler* masm) {
   __ lw(subject,
         FieldMemOperand(subject, ExternalString::kResourceDataOffset));
   // Move the pointer so that offset-wise, it looks like a sequential string.
-  STATIC_ASSERT(SeqTwoByteString::kHeaderSize == SeqAsciiString::kHeaderSize);
+  STATIC_ASSERT(SeqTwoByteString::kHeaderSize == SeqOneByteString::kHeaderSize);
   __ Subu(subject,
           subject,
           SeqTwoByteString::kHeaderSize - kHeapObjectTag);
@@ -5405,12 +5401,12 @@ void RegExpConstructResultStub::Generate(MacroAssembler* masm) {
   // Set FixedArray length.
   __ sll(t2, t1, kSmiTagSize);
   __ sw(t2, FieldMemOperand(a3, FixedArray::kLengthOffset));
-  // Fill contents of fixed-array with the-hole.
-  __ li(a2, Operand(masm->isolate()->factory()->the_hole_value()));
+  // Fill contents of fixed-array with undefined.
+  __ LoadRoot(a2, Heap::kUndefinedValueRootIndex);
   __ Addu(a3, a3, Operand(FixedArray::kHeaderSize - kHeapObjectTag));
-  // Fill fixed array elements with hole.
+  // Fill fixed array elements with undefined.
   // v0: JSArray, tagged.
-  // a2: the hole.
+  // a2: undefined.
   // a3: Start of elements in FixedArray.
   // t1: Number of elements to fill.
   Label loop;
@@ -5607,45 +5603,6 @@ void CallConstructStub::Generate(MacroAssembler* masm) {
 }
 
 
-// Unfortunately you have to run without snapshots to see most of these
-// names in the profile since most compare stubs end up in the snapshot.
-void CompareStub::PrintName(StringStream* stream) {
-  ASSERT((lhs_.is(a0) && rhs_.is(a1)) ||
-         (lhs_.is(a1) && rhs_.is(a0)));
-  const char* cc_name;
-  switch (cc_) {
-    case lt: cc_name = "LT"; break;
-    case gt: cc_name = "GT"; break;
-    case le: cc_name = "LE"; break;
-    case ge: cc_name = "GE"; break;
-    case eq: cc_name = "EQ"; break;
-    case ne: cc_name = "NE"; break;
-    default: cc_name = "UnknownCondition"; break;
-  }
-  bool is_equality = cc_ == eq || cc_ == ne;
-  stream->Add("CompareStub_%s", cc_name);
-  stream->Add(lhs_.is(a0) ? "_a0" : "_a1");
-  stream->Add(rhs_.is(a0) ? "_a0" : "_a1");
-  if (strict_ && is_equality) stream->Add("_STRICT");
-  if (never_nan_nan_ && is_equality) stream->Add("_NO_NAN");
-  if (!include_number_compare_) stream->Add("_NO_NUMBER");
-  if (!include_smi_compare_) stream->Add("_NO_SMI");
-}
-
-
-int CompareStub::MinorKey() {
-  // Encode the two parameters in a unique 16 bit value.
-  ASSERT(static_cast<unsigned>(cc_) < (1 << 14));
-  ASSERT((lhs_.is(a0) && rhs_.is(a1)) ||
-         (lhs_.is(a1) && rhs_.is(a0)));
-  return ConditionField::encode(static_cast<unsigned>(cc_))
-         | RegisterField::encode(lhs_.is(a0))
-         | StrictField::encode(strict_)
-         | NeverNanNanField::encode(cc_ == eq ? never_nan_nan_ : false)
-         | IncludeSmiCompareField::encode(include_smi_compare_);
-}
-
-
 // StringCharCodeAtGenerator.
 void StringCharCodeAtGenerator::GenerateFast(MacroAssembler* masm) {
   Label flat_string;
@@ -6079,7 +6036,7 @@ void StringHelper::GenerateTwoCharacterSymbolTableProbe(MacroAssembler* masm,
 
     // Check if the two characters match.
     // Assumes that word load is little endian.
-    __ lhu(scratch, FieldMemOperand(candidate, SeqAsciiString::kHeaderSize));
+    __ lhu(scratch, FieldMemOperand(candidate, SeqOneByteString::kHeaderSize));
     __ Branch(&found_in_symbol_table, eq, chars, Operand(scratch));
     __ bind(&next_probe[i]);
   }
@@ -6258,7 +6215,7 @@ void SubStringStub::Generate(MacroAssembler* masm) {
     // string's encoding is wrong because we always have to recheck encoding of
     // the newly created string's parent anyways due to externalized strings.
     Label two_byte_slice, set_slice_header;
-    STATIC_ASSERT((kStringEncodingMask & kAsciiStringTag) != 0);
+    STATIC_ASSERT((kStringEncodingMask & kOneByteStringTag) != 0);
     STATIC_ASSERT((kStringEncodingMask & kTwoByteStringTag) == 0);
     __ And(t0, a1, Operand(kStringEncodingMask));
     __ Branch(&two_byte_slice, eq, t0, Operand(zero_reg));
@@ -6296,12 +6253,12 @@ void SubStringStub::Generate(MacroAssembler* masm) {
 
   __ bind(&sequential_string);
   // Locate first character of underlying subject string.
-  STATIC_ASSERT(SeqTwoByteString::kHeaderSize == SeqAsciiString::kHeaderSize);
-  __ Addu(t1, t1, Operand(SeqAsciiString::kHeaderSize - kHeapObjectTag));
+  STATIC_ASSERT(SeqTwoByteString::kHeaderSize == SeqOneByteString::kHeaderSize);
+  __ Addu(t1, t1, Operand(SeqOneByteString::kHeaderSize - kHeapObjectTag));
 
   __ bind(&allocate_result);
   // Sequential acii string.  Allocate the result.
-  STATIC_ASSERT((kAsciiStringTag & kStringEncodingMask) != 0);
+  STATIC_ASSERT((kOneByteStringTag & kStringEncodingMask) != 0);
   __ And(t0, a1, Operand(kStringEncodingMask));
   __ Branch(&two_byte_sequential, eq, t0, Operand(zero_reg));
 
@@ -6312,13 +6269,13 @@ void SubStringStub::Generate(MacroAssembler* masm) {
   __ Addu(t1, t1, a3);
 
   // Locate first character of result.
-  __ Addu(a1, v0, Operand(SeqAsciiString::kHeaderSize - kHeapObjectTag));
+  __ Addu(a1, v0, Operand(SeqOneByteString::kHeaderSize - kHeapObjectTag));
 
   // v0: result string
   // a1: first character of result string
   // a2: result string length
   // t1: first character of substring to copy
-  STATIC_ASSERT((SeqAsciiString::kHeaderSize & kObjectAlignmentMask) == 0);
+  STATIC_ASSERT((SeqOneByteString::kHeaderSize & kObjectAlignmentMask) == 0);
   StringHelper::GenerateCopyCharactersLong(
       masm, a1, t1, a2, a3, t0, t2, t3, t4, COPY_ASCII | DEST_ALWAYS_ALIGNED);
   __ jmp(&return_v0);
@@ -6450,7 +6407,7 @@ void StringCompareStub::GenerateAsciiCharsCompareLoop(
   // doesn't need an additional compare.
   __ SmiUntag(length);
   __ Addu(scratch1, length,
-          Operand(SeqAsciiString::kHeaderSize - kHeapObjectTag));
+          Operand(SeqOneByteString::kHeaderSize - kHeapObjectTag));
   __ Addu(left, left, Operand(scratch1));
   __ Addu(right, right, Operand(scratch1));
   __ Subu(length, zero_reg, length);
@@ -6605,8 +6562,8 @@ void StringAddStub::Generate(MacroAssembler* masm) {
                                                  &call_runtime);
 
   // Get the two characters forming the sub string.
-  __ lbu(a2, FieldMemOperand(a0, SeqAsciiString::kHeaderSize));
-  __ lbu(a3, FieldMemOperand(a1, SeqAsciiString::kHeaderSize));
+  __ lbu(a2, FieldMemOperand(a0, SeqOneByteString::kHeaderSize));
+  __ lbu(a3, FieldMemOperand(a1, SeqOneByteString::kHeaderSize));
 
   // Try to lookup two character string in symbol table. If it is not found
   // just allocate a new one.
@@ -6624,7 +6581,7 @@ void StringAddStub::Generate(MacroAssembler* masm) {
   // in a little endian mode).
   __ li(t2, Operand(2));
   __ AllocateAsciiString(v0, t2, t0, t1, t5, &call_runtime);
-  __ sh(a2, FieldMemOperand(v0, SeqAsciiString::kHeaderSize));
+  __ sh(a2, FieldMemOperand(v0, SeqOneByteString::kHeaderSize));
   __ IncrementCounter(counters->string_add_native(), 1, a2, a3);
   __ DropAndRet(2);
 
@@ -6672,11 +6629,6 @@ void StringAddStub::Generate(MacroAssembler* masm) {
   __ and_(at, at, t1);
   __ Branch(&ascii_data, ne, at, Operand(zero_reg));
 
-  __ xor_(t0, t0, t1);
-  STATIC_ASSERT(kAsciiStringTag != 0 && kAsciiDataHintTag != 0);
-  __ And(t0, t0, Operand(kAsciiStringTag | kAsciiDataHintTag));
-  __ Branch(&ascii_data, eq, t0, Operand(kAsciiStringTag | kAsciiDataHintTag));
-
   // Allocate a two byte cons string.
   __ AllocateTwoByteConsString(v0, t2, t0, t1, &call_runtime);
   __ Branch(&allocated);
@@ -6708,11 +6660,11 @@ void StringAddStub::Generate(MacroAssembler* masm) {
   STATIC_ASSERT(kSeqStringTag == 0);
   __ And(t4, t0, Operand(kStringRepresentationMask));
 
-  STATIC_ASSERT(SeqAsciiString::kHeaderSize == SeqTwoByteString::kHeaderSize);
+  STATIC_ASSERT(SeqOneByteString::kHeaderSize == SeqTwoByteString::kHeaderSize);
   Label skip_first_add;
   __ Branch(&skip_first_add, ne, t4, Operand(zero_reg));
   __ Branch(USE_DELAY_SLOT, &first_prepared);
-  __ addiu(t3, a0, SeqAsciiString::kHeaderSize - kHeapObjectTag);
+  __ addiu(t3, a0, SeqOneByteString::kHeaderSize - kHeapObjectTag);
   __ bind(&skip_first_add);
   // External string: rule out short external string and load string resource.
   STATIC_ASSERT(kShortExternalStringTag != 0);
@@ -6723,11 +6675,11 @@ void StringAddStub::Generate(MacroAssembler* masm) {
 
   STATIC_ASSERT(kSeqStringTag == 0);
   __ And(t4, t1, Operand(kStringRepresentationMask));
-  STATIC_ASSERT(SeqAsciiString::kHeaderSize == SeqTwoByteString::kHeaderSize);
+  STATIC_ASSERT(SeqOneByteString::kHeaderSize == SeqTwoByteString::kHeaderSize);
   Label skip_second_add;
   __ Branch(&skip_second_add, ne, t4, Operand(zero_reg));
   __ Branch(USE_DELAY_SLOT, &second_prepared);
-  __ addiu(a1, a1, SeqAsciiString::kHeaderSize - kHeapObjectTag);
+  __ addiu(a1, a1, SeqOneByteString::kHeaderSize - kHeapObjectTag);
   __ bind(&skip_second_add);
   // External string: rule out short external string and load string resource.
   STATIC_ASSERT(kShortExternalStringTag != 0);
@@ -6748,7 +6700,7 @@ void StringAddStub::Generate(MacroAssembler* masm) {
   __ Branch(&non_ascii_string_add_flat_result, eq, t4, Operand(zero_reg));
 
   __ AllocateAsciiString(v0, t2, t0, t1, t5, &call_runtime);
-  __ Addu(t2, v0, Operand(SeqAsciiString::kHeaderSize - kHeapObjectTag));
+  __ Addu(t2, v0, Operand(SeqOneByteString::kHeaderSize - kHeapObjectTag));
   // v0: result string.
   // t3: first character of first string.
   // a1: first character of second string
@@ -6836,7 +6788,7 @@ void StringAddStub::GenerateConvertArgument(MacroAssembler* masm,
 
 
 void ICCompareStub::GenerateSmis(MacroAssembler* masm) {
-  ASSERT(state_ == CompareIC::SMIS);
+  ASSERT(state_ == CompareIC::SMI);
   Label miss;
   __ Or(a2, a1, a0);
   __ JumpIfNotSmi(a2, &miss);
@@ -6858,18 +6810,18 @@ void ICCompareStub::GenerateSmis(MacroAssembler* masm) {
 
 
 void ICCompareStub::GenerateHeapNumbers(MacroAssembler* masm) {
-  ASSERT(state_ == CompareIC::HEAP_NUMBERS);
+  ASSERT(state_ == CompareIC::HEAP_NUMBER);
 
   Label generic_stub;
   Label unordered, maybe_undefined1, maybe_undefined2;
   Label miss;
-  __ And(a2, a1, Operand(a0));
-  __ JumpIfSmi(a2, &generic_stub);
 
-  __ GetObjectType(a0, a2, a2);
-  __ Branch(&maybe_undefined1, ne, a2, Operand(HEAP_NUMBER_TYPE));
-  __ GetObjectType(a1, a2, a2);
-  __ Branch(&maybe_undefined2, ne, a2, Operand(HEAP_NUMBER_TYPE));
+  if (left_ == CompareIC::SMI) {
+    __ JumpIfNotSmi(a1, &miss);
+  }
+  if (right_ == CompareIC::SMI) {
+    __ JumpIfNotSmi(a0, &miss);
+  }
 
   // Inlining the double comparison and falling back to the general compare
   // stub if NaN is involved or FPU is unsupported.
@@ -6877,10 +6829,33 @@ void ICCompareStub::GenerateHeapNumbers(MacroAssembler* masm) {
     CpuFeatures::Scope scope(FPU);
 
     // Load left and right operand.
-    __ Subu(a2, a1, Operand(kHeapObjectTag));
-    __ ldc1(f0, MemOperand(a2, HeapNumber::kValueOffset));
+    Label done, left, left_smi, right_smi;
+    __ JumpIfSmi(a0, &right_smi);
+    __ CheckMap(a0, a2, Heap::kHeapNumberMapRootIndex, &maybe_undefined1,
+                DONT_DO_SMI_CHECK);
     __ Subu(a2, a0, Operand(kHeapObjectTag));
     __ ldc1(f2, MemOperand(a2, HeapNumber::kValueOffset));
+    __ Branch(&left);
+    __ bind(&right_smi);
+    __ SmiUntag(a2, a0);  // Can't clobber a0 yet.
+    FPURegister single_scratch = f6;
+    __ mtc1(a2, single_scratch);
+    __ cvt_d_w(f2, single_scratch);
+
+    __ bind(&left);
+    __ JumpIfSmi(a1, &left_smi);
+    __ CheckMap(a1, a2, Heap::kHeapNumberMapRootIndex, &maybe_undefined2,
+                DONT_DO_SMI_CHECK);
+    __ Subu(a2, a1, Operand(kHeapObjectTag));
+    __ ldc1(f0, MemOperand(a2, HeapNumber::kValueOffset));
+    __ Branch(&done);
+    __ bind(&left_smi);
+    __ SmiUntag(a2, a1);  // Can't clobber a1 yet.
+    single_scratch = f8;
+    __ mtc1(a2, single_scratch);
+    __ cvt_d_w(f0, single_scratch);
+
+    __ bind(&done);
 
     // Return a result of -1, 0, or 1, or use CompareStub for NaNs.
     Label fpu_eq, fpu_lt;
@@ -6904,15 +6879,16 @@ void ICCompareStub::GenerateHeapNumbers(MacroAssembler* masm) {
   }
 
   __ bind(&unordered);
-
-  CompareStub stub(GetCondition(), strict(), NO_COMPARE_FLAGS, a1, a0);
   __ bind(&generic_stub);
+  ICCompareStub stub(op_, CompareIC::GENERIC, CompareIC::GENERIC,
+                     CompareIC::GENERIC);
   __ Jump(stub.GetCode(), RelocInfo::CODE_TARGET);
 
   __ bind(&maybe_undefined1);
   if (Token::IsOrderedRelationalCompareOp(op_)) {
     __ LoadRoot(at, Heap::kUndefinedValueRootIndex);
     __ Branch(&miss, ne, a0, Operand(at));
+    __ JumpIfSmi(a1, &unordered);
     __ GetObjectType(a1, a2, a2);
     __ Branch(&maybe_undefined2, ne, a2, Operand(HEAP_NUMBER_TYPE));
     __ jmp(&unordered);
@@ -6930,7 +6906,7 @@ void ICCompareStub::GenerateHeapNumbers(MacroAssembler* masm) {
 
 
 void ICCompareStub::GenerateSymbols(MacroAssembler* masm) {
-  ASSERT(state_ == CompareIC::SYMBOLS);
+  ASSERT(state_ == CompareIC::SYMBOL);
   Label miss;
 
   // Registers containing left and right operands respectively.
@@ -6968,7 +6944,7 @@ void ICCompareStub::GenerateSymbols(MacroAssembler* masm) {
 
 
 void ICCompareStub::GenerateStrings(MacroAssembler* masm) {
-  ASSERT(state_ == CompareIC::STRINGS);
+  ASSERT(state_ == CompareIC::STRING);
   Label miss;
 
   bool equality = Token::IsEqualityOp(op_);
@@ -7053,7 +7029,7 @@ void ICCompareStub::GenerateStrings(MacroAssembler* masm) {
 
 
 void ICCompareStub::GenerateObjects(MacroAssembler* masm) {
-  ASSERT(state_ == CompareIC::OBJECTS);
+  ASSERT(state_ == CompareIC::OBJECT);
   Label miss;
   __ And(a2, a1, Operand(a0));
   __ JumpIfSmi(a2, &miss);
@@ -7265,8 +7241,7 @@ void StringDictionaryLookupStub::GeneratePositiveLookup(MacroAssembler* masm,
   ASSERT(!name.is(scratch1));
   ASSERT(!name.is(scratch2));
 
-  // Assert that name contains a string.
-  if (FLAG_debug_code) __ AbortIfNotString(name);
+  __ AssertString(name);
 
   // Compute the capacity mask.
   __ lw(scratch1, FieldMemOperand(elements, kCapacityOffset));
@@ -7512,6 +7487,11 @@ void RecordWriteStub::GenerateFixedRegStubsAheadOfTime() {
 }
 
 
+bool CodeStub::CanUseFPRegisters() {
+  return CpuFeatures::IsSupported(FPU);
+}
+
+
 // Takes the input in 3 registers: address_ value_ and object_.  A pointer to
 // the value has just been written into the object, now this stub makes sure
 // we keep the GC informed.  The word in the object where the value has been
@@ -7604,12 +7584,7 @@ void RecordWriteStub::InformIncrementalMarker(MacroAssembler* masm, Mode mode) {
   ASSERT(!address.is(a0));
   __ Move(address, regs_.address());
   __ Move(a0, regs_.object());
-  if (mode == INCREMENTAL_COMPACTION) {
-    __ Move(a1, address);
-  } else {
-    ASSERT(mode == INCREMENTAL);
-    __ lw(a1, MemOperand(address, 0));
-  }
+  __ Move(a1, address);
   __ li(a2, Operand(ExternalReference::isolate_address()));
 
   AllowExternalCallThatCantCauseGC scope(masm);
@@ -7637,6 +7612,16 @@ void RecordWriteStub::CheckNeedsToInformIncrementalMarker(
   Label need_incremental;
   Label need_incremental_pop_scratch;
 
+  __ And(regs_.scratch0(), regs_.object(), Operand(~Page::kPageAlignmentMask));
+  __ lw(regs_.scratch1(),
+        MemOperand(regs_.scratch0(),
+                   MemoryChunk::kWriteBarrierCounterOffset));
+  __ Subu(regs_.scratch1(), regs_.scratch1(), Operand(1));
+  __ sw(regs_.scratch1(),
+         MemOperand(regs_.scratch0(),
+                    MemoryChunk::kWriteBarrierCounterOffset));
+  __ Branch(&need_incremental, lt, regs_.scratch1(), Operand(zero_reg));
+
   // Let's look at the color of the object:  If it is not black we don't have
   // to inform the incremental marker.
   __ JumpIfBlack(regs_.object(), regs_.scratch0(), regs_.scratch1(), &on_black);
@@ -7761,7 +7746,9 @@ void StoreArrayLiteralElementStub::Generate(MacroAssembler* masm) {
   // Array literal has ElementsKind of FAST_*_DOUBLE_ELEMENTS.
   __ bind(&double_elements);
   __ lw(t1, FieldMemOperand(a1, JSObject::kElementsOffset));
-  __ StoreNumberToDoubleElements(a0, a3, a1, t1, t2, t3, t5, a2,
+  __ StoreNumberToDoubleElements(a0, a3,
+                                 // Overwrites all regs after this.
+                                 t1, t2, t3, t5, a2,
                                  &slow_elements);
   __ Ret(USE_DELAY_SLOT);
   __ mov(v0, a0);
diff --git a/deps/v8/src/mips/code-stubs-mips.h b/deps/v8/src/mips/code-stubs-mips.h
index e0954d837e..b560c63e0f 100644
--- a/deps/v8/src/mips/code-stubs-mips.h
+++ b/deps/v8/src/mips/code-stubs-mips.h
@@ -143,108 +143,6 @@ class UnaryOpStub: public CodeStub {
 };
 
 
-class BinaryOpStub: public CodeStub {
- public:
-  BinaryOpStub(Token::Value op, OverwriteMode mode)
-      : op_(op),
-        mode_(mode),
-        operands_type_(BinaryOpIC::UNINITIALIZED),
-        result_type_(BinaryOpIC::UNINITIALIZED) {
-    use_fpu_ = CpuFeatures::IsSupported(FPU);
-    ASSERT(OpBits::is_valid(Token::NUM_TOKENS));
-  }
-
-  BinaryOpStub(
-      int key,
-      BinaryOpIC::TypeInfo operands_type,
-      BinaryOpIC::TypeInfo result_type = BinaryOpIC::UNINITIALIZED)
-      : op_(OpBits::decode(key)),
-        mode_(ModeBits::decode(key)),
-        use_fpu_(FPUBits::decode(key)),
-        operands_type_(operands_type),
-        result_type_(result_type) { }
-
- private:
-  enum SmiCodeGenerateHeapNumberResults {
-    ALLOW_HEAPNUMBER_RESULTS,
-    NO_HEAPNUMBER_RESULTS
-  };
-
-  Token::Value op_;
-  OverwriteMode mode_;
-  bool use_fpu_;
-
-  // Operand type information determined at runtime.
-  BinaryOpIC::TypeInfo operands_type_;
-  BinaryOpIC::TypeInfo result_type_;
-
-  virtual void PrintName(StringStream* stream);
-
-  // Minor key encoding in 16 bits RRRTTTVOOOOOOOMM.
-  class ModeBits: public BitField<OverwriteMode, 0, 2> {};
-  class OpBits: public BitField<Token::Value, 2, 7> {};
-  class FPUBits: public BitField<bool, 9, 1> {};
-  class OperandTypeInfoBits: public BitField<BinaryOpIC::TypeInfo, 10, 3> {};
-  class ResultTypeInfoBits: public BitField<BinaryOpIC::TypeInfo, 13, 3> {};
-
-  Major MajorKey() { return BinaryOp; }
-  int MinorKey() {
-    return OpBits::encode(op_)
-           | ModeBits::encode(mode_)
-           | FPUBits::encode(use_fpu_)
-           | OperandTypeInfoBits::encode(operands_type_)
-           | ResultTypeInfoBits::encode(result_type_);
-  }
-
-  void Generate(MacroAssembler* masm);
-  void GenerateGeneric(MacroAssembler* masm);
-  void GenerateSmiSmiOperation(MacroAssembler* masm);
-  void GenerateFPOperation(MacroAssembler* masm,
-                           bool smi_operands,
-                           Label* not_numbers,
-                           Label* gc_required);
-  void GenerateSmiCode(MacroAssembler* masm,
-                       Label* use_runtime,
-                       Label* gc_required,
-                       SmiCodeGenerateHeapNumberResults heapnumber_results);
-  void GenerateLoadArguments(MacroAssembler* masm);
-  void GenerateReturn(MacroAssembler* masm);
-  void GenerateUninitializedStub(MacroAssembler* masm);
-  void GenerateSmiStub(MacroAssembler* masm);
-  void GenerateInt32Stub(MacroAssembler* masm);
-  void GenerateHeapNumberStub(MacroAssembler* masm);
-  void GenerateOddballStub(MacroAssembler* masm);
-  void GenerateStringStub(MacroAssembler* masm);
-  void GenerateBothStringStub(MacroAssembler* masm);
-  void GenerateGenericStub(MacroAssembler* masm);
-  void GenerateAddStrings(MacroAssembler* masm);
-  void GenerateCallRuntime(MacroAssembler* masm);
-
-  void GenerateHeapResultAllocation(MacroAssembler* masm,
-                                    Register result,
-                                    Register heap_number_map,
-                                    Register scratch1,
-                                    Register scratch2,
-                                    Label* gc_required);
-  void GenerateRegisterArgsPush(MacroAssembler* masm);
-  void GenerateTypeTransition(MacroAssembler* masm);
-  void GenerateTypeTransitionWithSavedArgs(MacroAssembler* masm);
-
-  virtual int GetCodeKind() { return Code::BINARY_OP_IC; }
-
-  virtual InlineCacheState GetICState() {
-    return BinaryOpIC::ToState(operands_type_);
-  }
-
-  virtual void FinishCode(Handle<Code> code) {
-    code->set_binary_op_type(operands_type_);
-    code->set_binary_op_result_type(result_type_);
-  }
-
-  friend class CodeGenerator;
-};
-
-
 class StringHelper : public AllStatic {
  public:
   // Generate code for copying characters using a simple loop. This should only
@@ -724,20 +622,6 @@ class FloatingPointHelper : public AllStatic {
                        Register scratch1,
                        Register scratch2);
 
-  // Loads objects from a0 and a1 (right and left in binary operations) into
-  // floating point registers. Depending on the destination the values ends up
-  // either f14 and f12 or in a2/a3 and a0/a1 respectively. If the destination
-  // is floating point registers FPU must be supported. If core registers are
-  // requested when FPU is supported f12 and f14 will still be scratched. If
-  // either a0 or a1 is not a number (not smi and not heap number object) the
-  // not_number label is jumped to with a0 and a1 intact.
-  static void LoadOperands(MacroAssembler* masm,
-                           FloatingPointHelper::Destination destination,
-                           Register heap_number_map,
-                           Register scratch1,
-                           Register scratch2,
-                           Label* not_number);
-
   // Convert the smi or heap number in object to an int32 using the rules
   // for ToInt32 as described in ECMAScript 9.5.: the value is truncated
   // and brought into the range -2^31 .. +2^31 - 1.
@@ -773,6 +657,7 @@ class FloatingPointHelper : public AllStatic {
                                       Register object,
                                       Destination destination,
                                       FPURegister double_dst,
+                                      FPURegister double_scratch,
                                       Register dst1,
                                       Register dst2,
                                       Register heap_number_map,
@@ -794,7 +679,8 @@ class FloatingPointHelper : public AllStatic {
                                 Register scratch1,
                                 Register scratch2,
                                 Register scratch3,
-                                FPURegister double_scratch,
+                                FPURegister double_scratch0,
+                                FPURegister double_scratch1,
                                 Label* not_int32);
 
   // Generate non FPU code to check if a double can be exactly represented by a
@@ -834,7 +720,12 @@ class FloatingPointHelper : public AllStatic {
                                           Register heap_number_result,
                                           Register scratch);
 
- private:
+  // Loads the objects from |object| into floating point registers.
+  // Depending on |destination| the value ends up either in |dst| or
+  // in |dst1|/|dst2|. If |destination| is kFPURegisters, then FPU
+  // must be supported. If kCoreRegisters are requested and FPU is
+  // supported, |dst| will be scratched. If |object| is neither smi nor
+  // heap number, |not_number| is jumped to with |object| still intact.
   static void LoadNumber(MacroAssembler* masm,
                          FloatingPointHelper::Destination destination,
                          Register object,
diff --git a/deps/v8/src/mips/codegen-mips.cc b/deps/v8/src/mips/codegen-mips.cc
index 44e0359e44..0119c11f53 100644
--- a/deps/v8/src/mips/codegen-mips.cc
+++ b/deps/v8/src/mips/codegen-mips.cc
@@ -31,11 +31,11 @@
 
 #include "codegen.h"
 #include "macro-assembler.h"
+#include "simulator-mips.h"
 
 namespace v8 {
 namespace internal {
 
-#define __ ACCESS_MASM(masm)
 
 UnaryMathFunction CreateTranscendentalFunction(TranscendentalCache::Type type) {
   switch (type) {
@@ -49,6 +49,74 @@ UnaryMathFunction CreateTranscendentalFunction(TranscendentalCache::Type type) {
 }
 
 
+#define __ masm.
+
+
+#if defined(USE_SIMULATOR)
+byte* fast_exp_mips_machine_code = NULL;
+double fast_exp_simulator(double x) {
+  return Simulator::current(Isolate::Current())->CallFP(
+      fast_exp_mips_machine_code, x, 0);
+}
+#endif
+
+
+UnaryMathFunction CreateExpFunction() {
+  if (!CpuFeatures::IsSupported(FPU)) return &exp;
+  if (!FLAG_fast_math) return &exp;
+  size_t actual_size;
+  byte* buffer = static_cast<byte*>(OS::Allocate(1 * KB, &actual_size, true));
+  if (buffer == NULL) return &exp;
+  ExternalReference::InitializeMathExpData();
+
+  MacroAssembler masm(NULL, buffer, static_cast<int>(actual_size));
+
+  {
+    CpuFeatures::Scope use_fpu(FPU);
+    DoubleRegister input = f12;
+    DoubleRegister result = f0;
+    DoubleRegister double_scratch1 = f4;
+    DoubleRegister double_scratch2 = f6;
+    Register temp1 = t0;
+    Register temp2 = t1;
+    Register temp3 = t2;
+
+    if (!IsMipsSoftFloatABI) {
+      // Input value is in f12 anyway, nothing to do.
+    } else {
+      __ Move(input, a0, a1);
+    }
+    __ Push(temp3, temp2, temp1);
+    MathExpGenerator::EmitMathExp(
+        &masm, input, result, double_scratch1, double_scratch2,
+        temp1, temp2, temp3);
+    __ Pop(temp3, temp2, temp1);
+    if (!IsMipsSoftFloatABI) {
+      // Result is already in f0, nothing to do.
+    } else {
+      __ Move(a0, a1, result);
+    }
+    __ Ret();
+  }
+
+  CodeDesc desc;
+  masm.GetCode(&desc);
+
+  CPU::FlushICache(buffer, actual_size);
+  OS::ProtectCode(buffer, actual_size);
+
+#if !defined(USE_SIMULATOR)
+  return FUNCTION_CAST<UnaryMathFunction>(buffer);
+#else
+  fast_exp_mips_machine_code = buffer;
+  return &fast_exp_simulator;
+#endif
+}
+
+
+#undef __
+
+
 UnaryMathFunction CreateSqrtFunction() {
   return &sqrt;
 }
@@ -72,6 +140,8 @@ void StubRuntimeCallHelper::AfterCall(MacroAssembler* masm) const {
 // -------------------------------------------------------------------------
 // Code generators
 
+#define __ ACCESS_MASM(masm)
+
 void ElementsTransitionGenerator::GenerateMapChangeElementsTransition(
     MacroAssembler* masm) {
   // ----------- S t a t e -------------
@@ -408,7 +478,7 @@ void StringCharLoadGenerator::Generate(MacroAssembler* masm,
   __ Branch(&external_string, ne, at, Operand(zero_reg));
 
   // Prepare sequential strings
-  STATIC_ASSERT(SeqTwoByteString::kHeaderSize == SeqAsciiString::kHeaderSize);
+  STATIC_ASSERT(SeqTwoByteString::kHeaderSize == SeqOneByteString::kHeaderSize);
   __ Addu(string,
           string,
           SeqTwoByteString::kHeaderSize - kHeapObjectTag);
@@ -446,6 +516,152 @@ void StringCharLoadGenerator::Generate(MacroAssembler* masm,
   __ bind(&done);
 }
 
+
+static MemOperand ExpConstant(int index, Register base) {
+  return MemOperand(base, index * kDoubleSize);
+}
+
+
+void MathExpGenerator::EmitMathExp(MacroAssembler* masm,
+                                   DoubleRegister input,
+                                   DoubleRegister result,
+                                   DoubleRegister double_scratch1,
+                                   DoubleRegister double_scratch2,
+                                   Register temp1,
+                                   Register temp2,
+                                   Register temp3) {
+  ASSERT(!input.is(result));
+  ASSERT(!input.is(double_scratch1));
+  ASSERT(!input.is(double_scratch2));
+  ASSERT(!result.is(double_scratch1));
+  ASSERT(!result.is(double_scratch2));
+  ASSERT(!double_scratch1.is(double_scratch2));
+  ASSERT(!temp1.is(temp2));
+  ASSERT(!temp1.is(temp3));
+  ASSERT(!temp2.is(temp3));
+  ASSERT(ExternalReference::math_exp_constants(0).address() != NULL);
+
+  Label done;
+
+  __ li(temp3, Operand(ExternalReference::math_exp_constants(0)));
+
+  __ ldc1(double_scratch1, ExpConstant(0, temp3));
+  __ Move(result, kDoubleRegZero);
+  __ BranchF(&done, NULL, ge, double_scratch1, input);
+  __ ldc1(double_scratch2, ExpConstant(1, temp3));
+  __ ldc1(result, ExpConstant(2, temp3));
+  __ BranchF(&done, NULL, ge, input, double_scratch2);
+  __ ldc1(double_scratch1, ExpConstant(3, temp3));
+  __ ldc1(result, ExpConstant(4, temp3));
+  __ mul_d(double_scratch1, double_scratch1, input);
+  __ add_d(double_scratch1, double_scratch1, result);
+  __ Move(temp2, temp1, double_scratch1);
+  __ sub_d(double_scratch1, double_scratch1, result);
+  __ ldc1(result, ExpConstant(6, temp3));
+  __ ldc1(double_scratch2, ExpConstant(5, temp3));
+  __ mul_d(double_scratch1, double_scratch1, double_scratch2);
+  __ sub_d(double_scratch1, double_scratch1, input);
+  __ sub_d(result, result, double_scratch1);
+  __ mul_d(input, double_scratch1, double_scratch1);
+  __ mul_d(result, result, input);
+  __ srl(temp1, temp2, 11);
+  __ ldc1(double_scratch2, ExpConstant(7, temp3));
+  __ mul_d(result, result, double_scratch2);
+  __ sub_d(result, result, double_scratch1);
+  __ ldc1(double_scratch2, ExpConstant(8, temp3));
+  __ add_d(result, result, double_scratch2);
+  __ li(at, 0x7ff);
+  __ And(temp2, temp2, at);
+  __ Addu(temp1, temp1, Operand(0x3ff));
+  __ sll(temp1, temp1, 20);
+
+  // Must not call ExpConstant() after overwriting temp3!
+  __ li(temp3, Operand(ExternalReference::math_exp_log_table()));
+  __ sll(at, temp2, 3);
+  __ addu(at, at, temp3);
+  __ lw(at, MemOperand(at));
+  __ Addu(temp3, temp3, Operand(kPointerSize));
+  __ sll(temp2, temp2, 3);
+  __ addu(temp2, temp2, temp3);
+  __ lw(temp2, MemOperand(temp2));
+  __ Or(temp1, temp1, temp2);
+  __ Move(input, at, temp1);
+  __ mul_d(result, result, input);
+  __ bind(&done);
+}
+
+
+// nop(CODE_AGE_MARKER_NOP)
+static const uint32_t kCodeAgePatchFirstInstruction = 0x00010180;
+
+static byte* GetNoCodeAgeSequence(uint32_t* length) {
+  // The sequence of instructions that is patched out for aging code is the
+  // following boilerplate stack-building prologue that is found in FUNCTIONS
+  static bool initialized = false;
+  static uint32_t sequence[kNoCodeAgeSequenceLength];
+  byte* byte_sequence = reinterpret_cast<byte*>(sequence);
+  *length = kNoCodeAgeSequenceLength * Assembler::kInstrSize;
+  if (!initialized) {
+    CodePatcher patcher(byte_sequence, kNoCodeAgeSequenceLength);
+    patcher.masm()->Push(ra, fp, cp, a1);
+    patcher.masm()->LoadRoot(at, Heap::kUndefinedValueRootIndex);
+    patcher.masm()->Addu(fp, sp, Operand(2 * kPointerSize));
+    initialized = true;
+  }
+  return byte_sequence;
+}
+
+
+bool Code::IsYoungSequence(byte* sequence) {
+  uint32_t young_length;
+  byte* young_sequence = GetNoCodeAgeSequence(&young_length);
+  bool result = !memcmp(sequence, young_sequence, young_length);
+  ASSERT(result ||
+         Memory::uint32_at(sequence) == kCodeAgePatchFirstInstruction);
+  return result;
+}
+
+
+void Code::GetCodeAgeAndParity(byte* sequence, Age* age,
+                               MarkingParity* parity) {
+  if (IsYoungSequence(sequence)) {
+    *age = kNoAge;
+    *parity = NO_MARKING_PARITY;
+  } else {
+    Address target_address = Memory::Address_at(
+        sequence + Assembler::kInstrSize * (kNoCodeAgeSequenceLength - 1));
+    Code* stub = GetCodeFromTargetAddress(target_address);
+    GetCodeAgeAndParity(stub, age, parity);
+  }
+}
+
+
+void Code::PatchPlatformCodeAge(byte* sequence,
+                                Code::Age age,
+                                MarkingParity parity) {
+  uint32_t young_length;
+  byte* young_sequence = GetNoCodeAgeSequence(&young_length);
+  if (age == kNoAge) {
+    memcpy(sequence, young_sequence, young_length);
+    CPU::FlushICache(sequence, young_length);
+  } else {
+    Code* stub = GetCodeAgeStub(age, parity);
+    CodePatcher patcher(sequence, young_length / Assembler::kInstrSize);
+    // Mark this code sequence for FindPlatformCodeAgeSequence()
+    patcher.masm()->nop(Assembler::CODE_AGE_MARKER_NOP);
+    // Save the function's original return address
+    // (it will be clobbered by Call(t9))
+    patcher.masm()->mov(at, ra);
+    // Load the stub address to t9 and call it
+    patcher.masm()->li(t9,
+        Operand(reinterpret_cast<uint32_t>(stub->instruction_start())));
+    patcher.masm()->Call(t9);
+    // Record the stub address in the empty space for GetCodeAgeAndParity()
+    patcher.masm()->dd(reinterpret_cast<uint32_t>(stub->instruction_start()));
+  }
+}
+
+
 #undef __
 
 } }  // namespace v8::internal
diff --git a/deps/v8/src/mips/codegen-mips.h b/deps/v8/src/mips/codegen-mips.h
index e704c4f56c..0ed2414a03 100644
--- a/deps/v8/src/mips/codegen-mips.h
+++ b/deps/v8/src/mips/codegen-mips.h
@@ -90,6 +90,22 @@ class StringCharLoadGenerator : public AllStatic {
   DISALLOW_COPY_AND_ASSIGN(StringCharLoadGenerator);
 };
 
+
+class MathExpGenerator : public AllStatic {
+ public:
+  static void EmitMathExp(MacroAssembler* masm,
+                          DoubleRegister input,
+                          DoubleRegister result,
+                          DoubleRegister double_scratch1,
+                          DoubleRegister double_scratch2,
+                          Register temp1,
+                          Register temp2,
+                          Register temp3);
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(MathExpGenerator);
+};
+
 } }  // namespace v8::internal
 
 #endif  // V8_MIPS_CODEGEN_MIPS_H_
diff --git a/deps/v8/src/mips/deoptimizer-mips.cc b/deps/v8/src/mips/deoptimizer-mips.cc
index 371d120887..e8ed9ccf7b 100644
--- a/deps/v8/src/mips/deoptimizer-mips.cc
+++ b/deps/v8/src/mips/deoptimizer-mips.cc
@@ -100,19 +100,7 @@ void Deoptimizer::DeoptimizeFunction(JSFunction* function) {
   // ignore all slots that might have been recorded on it.
   isolate->heap()->mark_compact_collector()->InvalidateCode(code);
 
-  // Iterate over all the functions which share the same code object
-  // and make them use unoptimized version.
-  Context* context = function->context()->native_context();
-  Object* element = context->get(Context::OPTIMIZED_FUNCTIONS_LIST);
-  SharedFunctionInfo* shared = function->shared();
-  while (!element->IsUndefined()) {
-    JSFunction* func = JSFunction::cast(element);
-    // Grab element before code replacement as ReplaceCode alters the list.
-    element = func->next_function_link();
-    if (func->code() == code) {
-      func->ReplaceCode(shared->code());
-    }
-  }
+  ReplaceCodeForRelatedFunctions(function, code);
 
   if (FLAG_trace_deopt) {
     PrintF("[forced deoptimization: ");
@@ -132,7 +120,7 @@ void Deoptimizer::PatchStackCheckCodeAt(Code* unoptimized_code,
                                         Code* check_code,
                                         Code* replacement_code) {
   const int kInstrSize = Assembler::kInstrSize;
-  // This structure comes from FullCodeGenerator::EmitStackCheck.
+  // This structure comes from FullCodeGenerator::EmitBackEdgeBookkeeping.
   // The call of the stack guard check has the following form:
   // sltu at, sp, t0 / slt at, a3, zero_reg (in case of count based interrupts)
   // beq at, zero_reg, ok
@@ -182,11 +170,7 @@ void Deoptimizer::RevertStackCheckCodeAt(Code* unoptimized_code,
 
   // Restore the sltu instruction so beq can be taken again.
   CodePatcher patcher(pc_after - 6 * kInstrSize, 1);
-  if (FLAG_count_based_interrupts) {
-    patcher.masm()->slt(at, a3, zero_reg);
-  } else {
-    patcher.masm()->sltu(at, sp, t0);
-  }
+  patcher.masm()->slt(at, a3, zero_reg);
 
   // Replace the on-stack replacement address in the load-immediate (lui/ori
   // pair) with the entry address of the normal stack-check code.
diff --git a/deps/v8/src/mips/full-codegen-mips.cc b/deps/v8/src/mips/full-codegen-mips.cc
index bfa24252b9..f9f8c404c2 100644
--- a/deps/v8/src/mips/full-codegen-mips.cc
+++ b/deps/v8/src/mips/full-codegen-mips.cc
@@ -139,7 +139,7 @@ void FullCodeGenerator::Generate() {
   handler_table_ =
       isolate()->factory()->NewFixedArray(function()->handler_count(), TENURED);
   profiling_counter_ = isolate()->factory()->NewJSGlobalPropertyCell(
-      Handle<Smi>(Smi::FromInt(FLAG_interrupt_budget)));
+      Handle<Smi>(Smi::FromInt(FLAG_interrupt_budget), isolate()));
   SetFunctionPosition(function());
   Comment cmnt(masm_, "[ function compiled by full code generator");
 
@@ -172,12 +172,13 @@ void FullCodeGenerator::Generate() {
 
   int locals_count = info->scope()->num_stack_slots();
 
+  info->set_prologue_offset(masm_->pc_offset());
+  // The following three instructions must remain together and unmodified for
+  // code aging to work properly.
   __ Push(ra, fp, cp, a1);
-  if (locals_count > 0) {
-    // Load undefined value here, so the value is ready for the loop
-    // below.
-    __ LoadRoot(at, Heap::kUndefinedValueRootIndex);
-  }
+  // Load undefined value here, so the value is ready for the loop
+  // below.
+  __ LoadRoot(at, Heap::kUndefinedValueRootIndex);
   // Adjust fp to point to caller's fp.
   __ Addu(fp, sp, Operand(2 * kPointerSize));
 
@@ -345,45 +346,34 @@ void FullCodeGenerator::EmitProfilingCounterReset() {
 }
 
 
-void FullCodeGenerator::EmitStackCheck(IterationStatement* stmt,
-                                       Label* back_edge_target) {
+void FullCodeGenerator::EmitBackEdgeBookkeeping(IterationStatement* stmt,
+                                                Label* back_edge_target) {
   // The generated code is used in Deoptimizer::PatchStackCheckCodeAt so we need
   // to make sure it is constant. Branch may emit a skip-or-jump sequence
   // instead of the normal Branch. It seems that the "skip" part of that
   // sequence is about as long as this Branch would be so it is safe to ignore
   // that.
   Assembler::BlockTrampolinePoolScope block_trampoline_pool(masm_);
-  Comment cmnt(masm_, "[ Stack check");
+  Comment cmnt(masm_, "[ Back edge bookkeeping");
   Label ok;
-  if (FLAG_count_based_interrupts) {
-    int weight = 1;
-    if (FLAG_weighted_back_edges) {
-      ASSERT(back_edge_target->is_bound());
-      int distance = masm_->SizeOfCodeGeneratedSince(back_edge_target);
-      weight = Min(kMaxBackEdgeWeight,
-                   Max(1, distance / kBackEdgeDistanceUnit));
-    }
-    EmitProfilingCounterDecrement(weight);
-    __ slt(at, a3, zero_reg);
-    __ beq(at, zero_reg, &ok);
-    // CallStub will emit a li t9 first, so it is safe to use the delay slot.
-    InterruptStub stub;
-    __ CallStub(&stub);
-  } else {
-    __ LoadRoot(t0, Heap::kStackLimitRootIndex);
-    __ sltu(at, sp, t0);
-    __ beq(at, zero_reg, &ok);
-    // CallStub will emit a li t9 first, so it is safe to use the delay slot.
-    StackCheckStub stub;
-    __ CallStub(&stub);
+  int weight = 1;
+  if (FLAG_weighted_back_edges) {
+    ASSERT(back_edge_target->is_bound());
+    int distance = masm_->SizeOfCodeGeneratedSince(back_edge_target);
+    weight = Min(kMaxBackEdgeWeight,
+                 Max(1, distance / kBackEdgeDistanceUnit));
   }
+  EmitProfilingCounterDecrement(weight);
+  __ slt(at, a3, zero_reg);
+  __ beq(at, zero_reg, &ok);
+  // CallStub will emit a li t9 first, so it is safe to use the delay slot.
+  InterruptStub stub;
+  __ CallStub(&stub);
   // Record a mapping of this PC offset to the OSR id.  This is used to find
   // the AST id from the unoptimized code in order to use it as a key into
   // the deoptimization input data found in the optimized code.
-  RecordStackCheck(stmt->OsrEntryId());
-  if (FLAG_count_based_interrupts) {
-    EmitProfilingCounterReset();
-  }
+  RecordBackEdge(stmt->OsrEntryId());
+  EmitProfilingCounterReset();
 
   __ bind(&ok);
   PrepareForBailoutForId(stmt->EntryId(), NO_REGISTERS);
@@ -929,34 +919,33 @@ void FullCodeGenerator::VisitFunctionDeclaration(
 
 
 void FullCodeGenerator::VisitModuleDeclaration(ModuleDeclaration* declaration) {
-  VariableProxy* proxy = declaration->proxy();
-  Variable* variable = proxy->var();
-  Handle<JSModule> instance = declaration->module()->interface()->Instance();
-  ASSERT(!instance.is_null());
+  Variable* variable = declaration->proxy()->var();
+  ASSERT(variable->location() == Variable::CONTEXT);
+  ASSERT(variable->interface()->IsFrozen());
 
-  switch (variable->location()) {
-    case Variable::UNALLOCATED: {
-      Comment cmnt(masm_, "[ ModuleDeclaration");
-      globals_->Add(variable->name(), zone());
-      globals_->Add(instance, zone());
-      Visit(declaration->module());
-      break;
-    }
+  Comment cmnt(masm_, "[ ModuleDeclaration");
+  EmitDebugCheckDeclarationContext(variable);
 
-    case Variable::CONTEXT: {
-      Comment cmnt(masm_, "[ ModuleDeclaration");
-      EmitDebugCheckDeclarationContext(variable);
-      __ li(a1, Operand(instance));
-      __ sw(a1, ContextOperand(cp, variable->index()));
-      Visit(declaration->module());
-      break;
-    }
+  // Load instance object.
+  __ LoadContext(a1, scope_->ContextChainLength(scope_->GlobalScope()));
+  __ lw(a1, ContextOperand(a1, variable->interface()->Index()));
+  __ lw(a1, ContextOperand(a1, Context::EXTENSION_INDEX));
 
-    case Variable::PARAMETER:
-    case Variable::LOCAL:
-    case Variable::LOOKUP:
-      UNREACHABLE();
-  }
+  // Assign it.
+  __ sw(a1, ContextOperand(cp, variable->index()));
+  // We know that we have written a module, which is not a smi.
+  __ RecordWriteContextSlot(cp,
+                            Context::SlotOffset(variable->index()),
+                            a1,
+                            a3,
+                            kRAHasBeenSaved,
+                            kDontSaveFPRegs,
+                            EMIT_REMEMBERED_SET,
+                            OMIT_SMI_CHECK);
+  PrepareForBailoutForId(declaration->proxy()->id(), NO_REGISTERS);
+
+  // Traverse into body.
+  Visit(declaration->module());
 }
 
 
@@ -999,6 +988,14 @@ void FullCodeGenerator::DeclareGlobals(Handle<FixedArray> pairs) {
 }
 
 
+void FullCodeGenerator::DeclareModules(Handle<FixedArray> descriptions) {
+  // Call the runtime to declare the modules.
+  __ Push(descriptions);
+  __ CallRuntime(Runtime::kDeclareModules, 1);
+  // Return value is ignored.
+}
+
+
 void FullCodeGenerator::VisitSwitchStatement(SwitchStatement* stmt) {
   Comment cmnt(masm_, "[ SwitchStatement");
   Breakable nested_statement(this, stmt);
@@ -1152,7 +1149,7 @@ void FullCodeGenerator::VisitForInStatement(ForInStatement* stmt) {
   __ EnumLength(a1, v0);
   __ Branch(&no_descriptors, eq, a1, Operand(Smi::FromInt(0)));
 
-  __ LoadInstanceDescriptors(v0, a2, t0);
+  __ LoadInstanceDescriptors(v0, a2);
   __ lw(a2, FieldMemOperand(a2, DescriptorArray::kEnumCacheOffset));
   __ lw(a2, FieldMemOperand(a2, DescriptorArray::kEnumCacheBridgeCacheOffset));
 
@@ -1251,7 +1248,7 @@ void FullCodeGenerator::VisitForInStatement(ForInStatement* stmt) {
   __ Addu(a0, a0, Operand(Smi::FromInt(1)));
   __ push(a0);
 
-  EmitStackCheck(stmt, &loop);
+  EmitBackEdgeBookkeeping(stmt, &loop);
   __ Branch(&loop);
 
   // Remove the pointers stored on the stack.
@@ -1399,9 +1396,9 @@ void FullCodeGenerator::EmitDynamicLookupFastCase(Variable* var,
   } else if (var->mode() == DYNAMIC_LOCAL) {
     Variable* local = var->local_if_not_shadowed();
     __ lw(v0, ContextSlotOperandCheckExtensions(local, slow));
-    if (local->mode() == CONST ||
-        local->mode() == CONST_HARMONY ||
-        local->mode() == LET) {
+    if (local->mode() == LET ||
+        local->mode() == CONST ||
+        local->mode() == CONST_HARMONY) {
       __ LoadRoot(at, Heap::kTheHoleValueRootIndex);
       __ subu(at, v0, at);  // Sub as compare: at == 0 on eq.
       if (local->mode() == CONST) {
@@ -2208,44 +2205,17 @@ void FullCodeGenerator::EmitNamedPropertyAssignment(Assignment* expr) {
   ASSERT(prop != NULL);
   ASSERT(prop->key()->AsLiteral() != NULL);
 
-  // If the assignment starts a block of assignments to the same object,
-  // change to slow case to avoid the quadratic behavior of repeatedly
-  // adding fast properties.
-  if (expr->starts_initialization_block()) {
-    __ push(result_register());
-    __ lw(t0, MemOperand(sp, kPointerSize));  // Receiver is now under value.
-    __ push(t0);
-    __ CallRuntime(Runtime::kToSlowProperties, 1);
-    __ pop(result_register());
-  }
-
   // Record source code position before IC call.
   SetSourcePosition(expr->position());
   __ mov(a0, result_register());  // Load the value.
   __ li(a2, Operand(prop->key()->AsLiteral()->handle()));
-  // Load receiver to a1. Leave a copy in the stack if needed for turning the
-  // receiver into fast case.
-  if (expr->ends_initialization_block()) {
-    __ lw(a1, MemOperand(sp));
-  } else {
-    __ pop(a1);
-  }
+  __ pop(a1);
 
   Handle<Code> ic = is_classic_mode()
         ? isolate()->builtins()->StoreIC_Initialize()
         : isolate()->builtins()->StoreIC_Initialize_Strict();
   CallIC(ic, RelocInfo::CODE_TARGET, expr->AssignmentFeedbackId());
 
-  // If the assignment ends an initialization block, revert to fast case.
-  if (expr->ends_initialization_block()) {
-    __ push(v0);  // Result of assignment, saved even if not needed.
-    // Receiver is under the result value.
-    __ lw(t0, MemOperand(sp, kPointerSize));
-    __ push(t0);
-    __ CallRuntime(Runtime::kToFastProperties, 1);
-    __ pop(v0);
-    __ Drop(1);
-  }
   PrepareForBailoutForId(expr->AssignmentId(), TOS_REG);
   context()->Plug(v0);
 }
@@ -2254,18 +2224,6 @@ void FullCodeGenerator::EmitNamedPropertyAssignment(Assignment* expr) {
 void FullCodeGenerator::EmitKeyedPropertyAssignment(Assignment* expr) {
   // Assignment to a property, using a keyed store IC.
 
-  // If the assignment starts a block of assignments to the same object,
-  // change to slow case to avoid the quadratic behavior of repeatedly
-  // adding fast properties.
-  if (expr->starts_initialization_block()) {
-    __ push(result_register());
-    // Receiver is now under the key and value.
-    __ lw(t0, MemOperand(sp, 2 * kPointerSize));
-    __ push(t0);
-    __ CallRuntime(Runtime::kToSlowProperties, 1);
-    __ pop(result_register());
-  }
-
   // Record source code position before IC call.
   SetSourcePosition(expr->position());
   // Call keyed store IC.
@@ -2275,29 +2233,13 @@ void FullCodeGenerator::EmitKeyedPropertyAssignment(Assignment* expr) {
   // - a2 is the receiver.
   __ mov(a0, result_register());
   __ pop(a1);  // Key.
-  // Load receiver to a2. Leave a copy in the stack if needed for turning the
-  // receiver into fast case.
-  if (expr->ends_initialization_block()) {
-    __ lw(a2, MemOperand(sp));
-  } else {
-    __ pop(a2);
-  }
+  __ pop(a2);
 
   Handle<Code> ic = is_classic_mode()
       ? isolate()->builtins()->KeyedStoreIC_Initialize()
       : isolate()->builtins()->KeyedStoreIC_Initialize_Strict();
   CallIC(ic, RelocInfo::CODE_TARGET, expr->AssignmentFeedbackId());
 
-  // If the assignment ends an initialization block, revert to fast case.
-  if (expr->ends_initialization_block()) {
-    __ push(v0);  // Result of assignment, saved even if not needed.
-    // Receiver is under the result value.
-    __ lw(t0, MemOperand(sp, kPointerSize));
-    __ push(t0);
-    __ CallRuntime(Runtime::kToFastProperties, 1);
-    __ pop(v0);
-    __ Drop(1);
-  }
   PrepareForBailoutForId(expr->AssignmentId(), TOS_REG);
   context()->Plug(v0);
 }
@@ -2457,7 +2399,7 @@ void FullCodeGenerator::VisitCall(Call* expr) {
   VariableProxy* proxy = callee->AsVariableProxy();
   Property* property = callee->AsProperty();
 
-  if (proxy != NULL && proxy->var()->is_possibly_eval()) {
+  if (proxy != NULL && proxy->var()->is_possibly_eval(isolate())) {
     // In a call to eval, we first call %ResolvePossiblyDirectEval to
     // resolve the function we need to call and the receiver of the
     // call.  Then we call the resolved function using the given
@@ -2745,7 +2687,7 @@ void FullCodeGenerator::EmitIsStringWrapperSafeForDefaultValueOf(
   context()->PrepareTest(&materialize_true, &materialize_false,
                          &if_true, &if_false, &fall_through);
 
-  if (generate_debug_code_) __ AbortIfSmi(v0);
+  __ AssertNotSmi(v0);
 
   __ lw(a1, FieldMemOperand(v0, HeapObject::kMapOffset));
   __ lbu(t0, FieldMemOperand(a1, Map::kBitField2Offset));
@@ -2759,27 +2701,31 @@ void FullCodeGenerator::EmitIsStringWrapperSafeForDefaultValueOf(
   __ Branch(if_false, eq, a2, Operand(t0));
 
   // Look for valueOf symbol in the descriptor array, and indicate false if
-  // found. The type is not checked, so if it is a transition it is a false
-  // negative.
-  __ LoadInstanceDescriptors(a1, t0, a3);
-  __ lw(a3, FieldMemOperand(t0, FixedArray::kLengthOffset));
-  // t0: descriptor array
-  // a3: length of descriptor array
-  // Calculate the end of the descriptor array.
+  // found. Since we omit an enumeration index check, if it is added via a
+  // transition that shares its descriptor array, this is a false positive.
+  Label entry, loop, done;
+
+  // Skip loop if no descriptors are valid.
+  __ NumberOfOwnDescriptors(a3, a1);
+  __ Branch(&done, eq, a3, Operand(zero_reg));
+
+  __ LoadInstanceDescriptors(a1, t0);
+  // t0: descriptor array.
+  // a3: valid entries in the descriptor array.
   STATIC_ASSERT(kSmiTag == 0);
   STATIC_ASSERT(kSmiTagSize == 1);
   STATIC_ASSERT(kPointerSize == 4);
-  __ Addu(a2, t0, Operand(FixedArray::kHeaderSize - kHeapObjectTag));
+  __ li(at, Operand(DescriptorArray::kDescriptorSize));
+  __ Mul(a3, a3, at);
+  // Calculate location of the first key name.
+  __ Addu(t0, t0, Operand(DescriptorArray::kFirstOffset - kHeapObjectTag));
+  // Calculate the end of the descriptor array.
+  __ mov(a2, t0);
   __ sll(t1, a3, kPointerSizeLog2 - kSmiTagSize);
   __ Addu(a2, a2, t1);
 
-  // Calculate location of the first key name.
-  __ Addu(t0,
-          t0,
-          Operand(DescriptorArray::kFirstOffset - kHeapObjectTag));
   // Loop through all the keys in the descriptor array. If one of these is the
   // symbol valueOf the result is false.
-  Label entry, loop;
   // The use of t2 to store the valueOf symbol asumes that it is not otherwise
   // used in the loop below.
   __ LoadRoot(t2, Heap::kvalue_of_symbolRootIndex);
@@ -2791,7 +2737,8 @@ void FullCodeGenerator::EmitIsStringWrapperSafeForDefaultValueOf(
   __ bind(&entry);
   __ Branch(&loop, ne, t0, Operand(a2));
 
-  // If a valueOf property is not found on the object check that it's
+  __ bind(&done);
+  // If a valueOf property is not found on the object check that its
   // prototype is the un-modified String prototype. If not result is false.
   __ lw(a2, FieldMemOperand(a1, Map::kPrototypeOffset));
   __ JumpIfSmi(a2, if_false);
@@ -3621,7 +3568,7 @@ void FullCodeGenerator::EmitGetCachedArrayIndex(CallRuntime* expr) {
   ASSERT(args->length() == 1);
   VisitForAccumulatorValue(args->at(0));
 
-  __ AbortIfNotString(v0);
+  __ AssertString(v0);
 
   __ lw(v0, FieldMemOperand(v0, String::kHashFieldOffset));
   __ IndexFromHash(v0, v0);
@@ -3706,7 +3653,7 @@ void FullCodeGenerator::EmitFastAsciiArrayJoin(CallRuntime* expr) {
   __ lw(scratch1, FieldMemOperand(string, HeapObject::kMapOffset));
   __ lbu(scratch1, FieldMemOperand(scratch1, Map::kInstanceTypeOffset));
   __ JumpIfInstanceTypeIsNotSequentialAscii(scratch1, scratch2, &bailout);
-  __ lw(scratch1, FieldMemOperand(string, SeqAsciiString::kLengthOffset));
+  __ lw(scratch1, FieldMemOperand(string, SeqOneByteString::kLengthOffset));
   __ AdduAndCheckForOverflow(string_length, string_length, scratch1, scratch3);
   __ BranchOnOverflow(&bailout, scratch3);
   __ Branch(&loop, lt, element, Operand(elements_end));
@@ -3733,7 +3680,7 @@ void FullCodeGenerator::EmitFastAsciiArrayJoin(CallRuntime* expr) {
   // Add (separator length times array_length) - separator length to the
   // string_length to get the length of the result string. array_length is not
   // smi but the other values are, so the result is a smi.
-  __ lw(scratch1, FieldMemOperand(separator, SeqAsciiString::kLengthOffset));
+  __ lw(scratch1, FieldMemOperand(separator, SeqOneByteString::kLengthOffset));
   __ Subu(string_length, string_length, Operand(scratch1));
   __ Mult(array_length, scratch1);
   // Check for smi overflow. No overflow if higher 33 bits of 64-bit result are
@@ -3773,10 +3720,10 @@ void FullCodeGenerator::EmitFastAsciiArrayJoin(CallRuntime* expr) {
   array_length = no_reg;
   __ Addu(result_pos,
           result,
-          Operand(SeqAsciiString::kHeaderSize - kHeapObjectTag));
+          Operand(SeqOneByteString::kHeaderSize - kHeapObjectTag));
 
   // Check the length of the separator.
-  __ lw(scratch1, FieldMemOperand(separator, SeqAsciiString::kLengthOffset));
+  __ lw(scratch1, FieldMemOperand(separator, SeqOneByteString::kLengthOffset));
   __ li(at, Operand(Smi::FromInt(1)));
   __ Branch(&one_char_separator, eq, scratch1, Operand(at));
   __ Branch(&long_separator, gt, scratch1, Operand(at));
@@ -3793,7 +3740,7 @@ void FullCodeGenerator::EmitFastAsciiArrayJoin(CallRuntime* expr) {
   __ Addu(element, element, kPointerSize);
   __ lw(string_length, FieldMemOperand(string, String::kLengthOffset));
   __ SmiUntag(string_length);
-  __ Addu(string, string, SeqAsciiString::kHeaderSize - kHeapObjectTag);
+  __ Addu(string, string, SeqOneByteString::kHeaderSize - kHeapObjectTag);
   __ CopyBytes(string, result_pos, string_length, scratch1);
   // End while (element < elements_end).
   __ Branch(&empty_separator_loop, lt, element, Operand(elements_end));
@@ -3803,7 +3750,7 @@ void FullCodeGenerator::EmitFastAsciiArrayJoin(CallRuntime* expr) {
   // One-character separator case.
   __ bind(&one_char_separator);
   // Replace separator with its ASCII character value.
-  __ lbu(separator, FieldMemOperand(separator, SeqAsciiString::kHeaderSize));
+  __ lbu(separator, FieldMemOperand(separator, SeqOneByteString::kHeaderSize));
   // Jump into the loop after the code that copies the separator, so the first
   // element is not preceded by a separator.
   __ jmp(&one_char_separator_loop_entry);
@@ -3825,7 +3772,7 @@ void FullCodeGenerator::EmitFastAsciiArrayJoin(CallRuntime* expr) {
   __ Addu(element, element, kPointerSize);
   __ lw(string_length, FieldMemOperand(string, String::kLengthOffset));
   __ SmiUntag(string_length);
-  __ Addu(string, string, SeqAsciiString::kHeaderSize - kHeapObjectTag);
+  __ Addu(string, string, SeqOneByteString::kHeaderSize - kHeapObjectTag);
   __ CopyBytes(string, result_pos, string_length, scratch1);
   // End while (element < elements_end).
   __ Branch(&one_char_separator_loop, lt, element, Operand(elements_end));
@@ -3846,7 +3793,7 @@ void FullCodeGenerator::EmitFastAsciiArrayJoin(CallRuntime* expr) {
   __ SmiUntag(string_length);
   __ Addu(string,
           separator,
-          Operand(SeqAsciiString::kHeaderSize - kHeapObjectTag));
+          Operand(SeqOneByteString::kHeaderSize - kHeapObjectTag));
   __ CopyBytes(string, result_pos, string_length, scratch1);
 
   __ bind(&long_separator);
@@ -3854,7 +3801,7 @@ void FullCodeGenerator::EmitFastAsciiArrayJoin(CallRuntime* expr) {
   __ Addu(element, element, kPointerSize);
   __ lw(string_length, FieldMemOperand(string, String::kLengthOffset));
   __ SmiUntag(string_length);
-  __ Addu(string, string, SeqAsciiString::kHeaderSize - kHeapObjectTag);
+  __ Addu(string, string, SeqOneByteString::kHeaderSize - kHeapObjectTag);
   __ CopyBytes(string, result_pos, string_length, scratch1);
   // End while (element < elements_end).
   __ Branch(&long_separator_loop, lt, element, Operand(elements_end));
@@ -4150,9 +4097,8 @@ void FullCodeGenerator::VisitCountOperation(CountOperation* expr) {
   JumpPatchSite patch_site(masm_);
 
   int count_value = expr->op() == Token::INC ? 1 : -1;
-  __ li(a1, Operand(Smi::FromInt(count_value)));
-
   if (ShouldInlineSmiCase(expr->op())) {
+    __ li(a1, Operand(Smi::FromInt(count_value)));
     __ AdduAndCheckForOverflow(v0, a0, a1, t0);
     __ BranchOnOverflow(&stub_call, t0);  // Do stub on overflow.
 
@@ -4161,6 +4107,8 @@ void FullCodeGenerator::VisitCountOperation(CountOperation* expr) {
     patch_site.EmitJumpIfSmi(v0, &done);
     __ bind(&stub_call);
   }
+  __ mov(a1, a0);
+  __ li(a0, Operand(Smi::FromInt(count_value)));
 
   // Record position before stub call.
   SetSourcePosition(expr->position());
@@ -4383,29 +4331,7 @@ void FullCodeGenerator::VisitCompareOperation(CompareOperation* expr) {
 
     default: {
       VisitForAccumulatorValue(expr->right());
-      Condition cc = eq;
-      switch (op) {
-        case Token::EQ_STRICT:
-        case Token::EQ:
-          cc = eq;
-          break;
-        case Token::LT:
-          cc = lt;
-          break;
-        case Token::GT:
-          cc = gt;
-         break;
-        case Token::LTE:
-          cc = le;
-          break;
-        case Token::GTE:
-          cc = ge;
-          break;
-        case Token::IN:
-        case Token::INSTANCEOF:
-        default:
-          UNREACHABLE();
-      }
+      Condition cc = CompareIC::ComputeCondition(op);
       __ mov(a0, result_register());
       __ pop(a1);
 
diff --git a/deps/v8/src/mips/ic-mips.cc b/deps/v8/src/mips/ic-mips.cc
index 3f2ecb88a5..4ac92aff19 100644
--- a/deps/v8/src/mips/ic-mips.cc
+++ b/deps/v8/src/mips/ic-mips.cc
@@ -1189,6 +1189,144 @@ void KeyedStoreIC::GenerateRuntimeSetProperty(MacroAssembler* masm,
 }
 
 
+static void KeyedStoreGenerateGenericHelper(
+    MacroAssembler* masm,
+    Label* fast_object,
+    Label* fast_double,
+    Label* slow,
+    KeyedStoreCheckMap check_map,
+    KeyedStoreIncrementLength increment_length,
+    Register value,
+    Register key,
+    Register receiver,
+    Register receiver_map,
+    Register elements_map,
+    Register elements) {
+  Label transition_smi_elements;
+  Label finish_object_store, non_double_value, transition_double_elements;
+  Label fast_double_without_map_check;
+
+  // Fast case: Do the store, could be either Object or double.
+  __ bind(fast_object);
+  Register scratch_value = t0;
+  Register address = t1;
+  if (check_map == kCheckMap) {
+    __ lw(elements_map, FieldMemOperand(elements, HeapObject::kMapOffset));
+    __ Branch(fast_double, ne, elements_map,
+              Operand(masm->isolate()->factory()->fixed_array_map()));
+  }
+  // Smi stores don't require further checks.
+  Label non_smi_value;
+  __ JumpIfNotSmi(value, &non_smi_value);
+
+  if (increment_length == kIncrementLength) {
+    // Add 1 to receiver->length.
+    __ Addu(scratch_value, key, Operand(Smi::FromInt(1)));
+    __ sw(scratch_value, FieldMemOperand(receiver, JSArray::kLengthOffset));
+  }
+  // It's irrelevant whether array is smi-only or not when writing a smi.
+  __ Addu(address, elements, Operand(FixedArray::kHeaderSize - kHeapObjectTag));
+  __ sll(scratch_value, key, kPointerSizeLog2 - kSmiTagSize);
+  __ Addu(address, address, scratch_value);
+  __ sw(value, MemOperand(address));
+  __ Ret();
+
+  __ bind(&non_smi_value);
+  // Escape to elements kind transition case.
+  __ CheckFastObjectElements(receiver_map, scratch_value,
+                             &transition_smi_elements);
+
+  // Fast elements array, store the value to the elements backing store.
+  __ bind(&finish_object_store);
+  if (increment_length == kIncrementLength) {
+    // Add 1 to receiver->length.
+    __ Addu(scratch_value, key, Operand(Smi::FromInt(1)));
+    __ sw(scratch_value, FieldMemOperand(receiver, JSArray::kLengthOffset));
+  }
+  __ Addu(address, elements, Operand(FixedArray::kHeaderSize - kHeapObjectTag));
+  __ sll(scratch_value, key, kPointerSizeLog2 - kSmiTagSize);
+  __ Addu(address, address, scratch_value);
+  __ sw(value, MemOperand(address));
+  // Update write barrier for the elements array address.
+  __ mov(scratch_value, value);  // Preserve the value which is returned.
+  __ RecordWrite(elements,
+                 address,
+                 scratch_value,
+                 kRAHasNotBeenSaved,
+                 kDontSaveFPRegs,
+                 EMIT_REMEMBERED_SET,
+                 OMIT_SMI_CHECK);
+  __ Ret();
+
+  __ bind(fast_double);
+  if (check_map == kCheckMap) {
+    // Check for fast double array case. If this fails, call through to the
+    // runtime.
+    __ LoadRoot(at, Heap::kFixedDoubleArrayMapRootIndex);
+    __ Branch(slow, ne, elements_map, Operand(at));
+  }
+  __ bind(&fast_double_without_map_check);
+  __ StoreNumberToDoubleElements(value,
+                                 key,
+                                 elements,  // Overwritten.
+                                 a3,        // Scratch regs...
+                                 t0,
+                                 t1,
+                                 t2,
+                                 &transition_double_elements);
+  if (increment_length == kIncrementLength) {
+    // Add 1 to receiver->length.
+    __ Addu(scratch_value, key, Operand(Smi::FromInt(1)));
+    __ sw(scratch_value, FieldMemOperand(receiver, JSArray::kLengthOffset));
+  }
+  __ Ret();
+
+  __ bind(&transition_smi_elements);
+  // Transition the array appropriately depending on the value type.
+  __ lw(t0, FieldMemOperand(value, HeapObject::kMapOffset));
+  __ LoadRoot(at, Heap::kHeapNumberMapRootIndex);
+  __ Branch(&non_double_value, ne, t0, Operand(at));
+
+  // Value is a double. Transition FAST_SMI_ELEMENTS ->
+  // FAST_DOUBLE_ELEMENTS and complete the store.
+  __ LoadTransitionedArrayMapConditional(FAST_SMI_ELEMENTS,
+                                         FAST_DOUBLE_ELEMENTS,
+                                         receiver_map,
+                                         t0,
+                                         slow);
+  ASSERT(receiver_map.is(a3));  // Transition code expects map in a3
+  ElementsTransitionGenerator::GenerateSmiToDouble(masm, slow);
+  __ lw(elements, FieldMemOperand(receiver, JSObject::kElementsOffset));
+  __ jmp(&fast_double_without_map_check);
+
+  __ bind(&non_double_value);
+  // Value is not a double, FAST_SMI_ELEMENTS -> FAST_ELEMENTS
+  __ LoadTransitionedArrayMapConditional(FAST_SMI_ELEMENTS,
+                                         FAST_ELEMENTS,
+                                         receiver_map,
+                                         t0,
+                                         slow);
+  ASSERT(receiver_map.is(a3));  // Transition code expects map in a3
+  ElementsTransitionGenerator::GenerateMapChangeElementsTransition(masm);
+  __ lw(elements, FieldMemOperand(receiver, JSObject::kElementsOffset));
+  __ jmp(&finish_object_store);
+
+  __ bind(&transition_double_elements);
+  // Elements are FAST_DOUBLE_ELEMENTS, but value is an Object that's not a
+  // HeapNumber. Make sure that the receiver is a Array with FAST_ELEMENTS and
+  // transition array from FAST_DOUBLE_ELEMENTS to FAST_ELEMENTS
+  __ LoadTransitionedArrayMapConditional(FAST_DOUBLE_ELEMENTS,
+                                         FAST_ELEMENTS,
+                                         receiver_map,
+                                         t0,
+                                         slow);
+  ASSERT(receiver_map.is(a3));  // Transition code expects map in a3
+  ElementsTransitionGenerator::GenerateDoubleToObject(masm, slow);
+  __ lw(elements, FieldMemOperand(receiver, JSObject::kElementsOffset));
+  __ jmp(&finish_object_store);
+}
+
+
 void KeyedStoreIC::GenerateGeneric(MacroAssembler* masm,
                                    StrictModeFlag strict_mode) {
   // ---------- S t a t e --------------
@@ -1197,11 +1335,9 @@ void KeyedStoreIC::GenerateGeneric(MacroAssembler* masm,
   //  -- a2     : receiver
   //  -- ra     : return address
   // -----------------------------------
-  Label slow, array, extra, check_if_double_array;
-  Label fast_object_with_map_check, fast_object_without_map_check;
-  Label fast_double_with_map_check, fast_double_without_map_check;
-  Label transition_smi_elements, finish_object_store, non_double_value;
-  Label transition_double_elements;
+  Label slow, fast_object, fast_object_grow;
+  Label fast_double, fast_double_grow;
+  Label array, extra, check_if_double_array;
 
   // Register usage.
   Register value = a0;
@@ -1233,7 +1369,7 @@ void KeyedStoreIC::GenerateGeneric(MacroAssembler* masm,
   __ lw(elements, FieldMemOperand(receiver, JSObject::kElementsOffset));
   // Check array bounds. Both the key and the length of FixedArray are smis.
   __ lw(t0, FieldMemOperand(elements, FixedArray::kLengthOffset));
-  __ Branch(&fast_object_with_map_check, lo, key, Operand(t0));
+  __ Branch(&fast_object, lo, key, Operand(t0));
 
   // Slow case, handle jump to runtime.
   __ bind(&slow);
@@ -1258,19 +1394,11 @@ void KeyedStoreIC::GenerateGeneric(MacroAssembler* masm,
   __ Branch(
       &check_if_double_array, ne, elements_map, Heap::kFixedArrayMapRootIndex);
 
-  // Calculate key + 1 as smi.
-  STATIC_ASSERT(kSmiTag == 0);
-  __ Addu(t0, key, Operand(Smi::FromInt(1)));
-  __ sw(t0, FieldMemOperand(receiver, JSArray::kLengthOffset));
-  __ Branch(&fast_object_without_map_check);
+  __ jmp(&fast_object_grow);
 
   __ bind(&check_if_double_array);
   __ Branch(&slow, ne, elements_map, Heap::kFixedDoubleArrayMapRootIndex);
-  // Add 1 to key, and go to common element store code for doubles.
-  STATIC_ASSERT(kSmiTag == 0);
-  __ Addu(t0, key, Operand(Smi::FromInt(1)));
-  __ sw(t0, FieldMemOperand(receiver, JSArray::kLengthOffset));
-  __ jmp(&fast_double_without_map_check);
+  __ jmp(&fast_double_grow);
 
   // Array case: Get the length and the elements array from the JS
   // array. Check that the array is in fast mode (and writable); if it
@@ -1281,110 +1409,15 @@ void KeyedStoreIC::GenerateGeneric(MacroAssembler* masm,
   // Check the key against the length in the array.
   __ lw(t0, FieldMemOperand(receiver, JSArray::kLengthOffset));
   __ Branch(&extra, hs, key, Operand(t0));
-  // Fall through to fast case.
-
-  __ bind(&fast_object_with_map_check);
-  Register scratch_value = t0;
-  Register address = t1;
-  __ lw(elements_map, FieldMemOperand(elements, HeapObject::kMapOffset));
-  __ Branch(&fast_double_with_map_check,
-            ne,
-            elements_map,
-            Heap::kFixedArrayMapRootIndex);
-  __ bind(&fast_object_without_map_check);
-  // Smi stores don't require further checks.
-  Label non_smi_value;
-  __ JumpIfNotSmi(value, &non_smi_value);
-  // It's irrelevant whether array is smi-only or not when writing a smi.
-  __ Addu(address, elements, Operand(FixedArray::kHeaderSize - kHeapObjectTag));
-  __ sll(scratch_value, key, kPointerSizeLog2 - kSmiTagSize);
-  __ Addu(address, address, scratch_value);
-  __ sw(value, MemOperand(address));
-  __ Ret(USE_DELAY_SLOT);
-  __ mov(v0, value);
-
-  __ bind(&non_smi_value);
-  // Escape to elements kind transition case.
-  __ CheckFastObjectElements(receiver_map, scratch_value,
-                             &transition_smi_elements);
-  // Fast elements array, store the value to the elements backing store.
-  __ bind(&finish_object_store);
-  __ Addu(address, elements, Operand(FixedArray::kHeaderSize - kHeapObjectTag));
-  __ sll(scratch_value, key, kPointerSizeLog2 - kSmiTagSize);
-  __ Addu(address, address, scratch_value);
-  __ sw(value, MemOperand(address));
-  // Update write barrier for the elements array address.
-  __ mov(v0, value);  // Preserve the value which is returned.
-  __ RecordWrite(elements,
-                 address,
-                 value,
-                 kRAHasNotBeenSaved,
-                 kDontSaveFPRegs,
-                 EMIT_REMEMBERED_SET,
-                 OMIT_SMI_CHECK);
-  __ Ret();
-
-  __ bind(&fast_double_with_map_check);
-  // Check for fast double array case. If this fails, call through to the
-  // runtime.
-  __ Branch(&slow, ne, elements_map, Heap::kFixedDoubleArrayMapRootIndex);
-  __ bind(&fast_double_without_map_check);
-  __ StoreNumberToDoubleElements(value,
-                                 key,
-                                 receiver,
-                                 elements,
-                                 a3,
-                                 t0,
-                                 t1,
-                                 t2,
-                                 &transition_double_elements);
-  __ Ret(USE_DELAY_SLOT);
-  __ mov(v0, value);
 
-  __ bind(&transition_smi_elements);
-  // Transition the array appropriately depending on the value type.
-  __ lw(t0, FieldMemOperand(value, HeapObject::kMapOffset));
-  __ LoadRoot(at, Heap::kHeapNumberMapRootIndex);
-  __ Branch(&non_double_value, ne, t0, Operand(at));
-
-
-  // Value is a double. Transition FAST_SMI_ELEMENTS -> FAST_DOUBLE_ELEMENTS
-  // and complete the store.
-  __ LoadTransitionedArrayMapConditional(FAST_SMI_ELEMENTS,
-                                         FAST_DOUBLE_ELEMENTS,
-                                         receiver_map,
-                                         t0,
-                                         &slow);
-  ASSERT(receiver_map.is(a3));  // Transition code expects map in a3
-  ElementsTransitionGenerator::GenerateSmiToDouble(masm, &slow);
-  __ lw(elements, FieldMemOperand(receiver, JSObject::kElementsOffset));
-  __ jmp(&fast_double_without_map_check);
-
-  __ bind(&non_double_value);
-  // Value is not a double, FAST_SMI_ELEMENTS -> FAST_ELEMENTS
-  __ LoadTransitionedArrayMapConditional(FAST_SMI_ELEMENTS,
-                                         FAST_ELEMENTS,
-                                         receiver_map,
-                                         t0,
-                                         &slow);
-  ASSERT(receiver_map.is(a3));  // Transition code expects map in a3
-  ElementsTransitionGenerator::GenerateMapChangeElementsTransition(masm);
-  __ lw(elements, FieldMemOperand(receiver, JSObject::kElementsOffset));
-  __ jmp(&finish_object_store);
-
-  __ bind(&transition_double_elements);
-  // Elements are double, but value is an Object that's not a HeapNumber. Make
-  // sure that the receiver is a Array with Object elements and transition array
-  // from double elements to Object elements.
-  __ LoadTransitionedArrayMapConditional(FAST_DOUBLE_ELEMENTS,
-                                         FAST_ELEMENTS,
-                                         receiver_map,
-                                         t0,
-                                         &slow);
-  ASSERT(receiver_map.is(a3));  // Transition code expects map in a3
-  ElementsTransitionGenerator::GenerateDoubleToObject(masm, &slow);
-  __ lw(elements, FieldMemOperand(receiver, JSObject::kElementsOffset));
-  __ jmp(&finish_object_store);
+  KeyedStoreGenerateGenericHelper(masm, &fast_object, &fast_double,
+                                  &slow, kCheckMap, kDontIncrementLength,
+                                  value, key, receiver, receiver_map,
+                                  elements_map, elements);
+  KeyedStoreGenerateGenericHelper(masm, &fast_object_grow, &fast_double_grow,
+                                  &slow, kDontCheckMap, kIncrementLength,
+                                  value, key, receiver, receiver_map,
+                                  elements_map, elements);
 }
 
 
@@ -1661,36 +1694,16 @@ Condition CompareIC::ComputeCondition(Token::Value op) {
 }
 
 
-void CompareIC::UpdateCaches(Handle<Object> x, Handle<Object> y) {
-  HandleScope scope;
-  Handle<Code> rewritten;
-  State previous_state = GetState();
-  State state = TargetState(previous_state, false, x, y);
-  if (state == GENERIC) {
-    CompareStub stub(GetCondition(), strict(), NO_COMPARE_FLAGS, a1, a0);
-    rewritten = stub.GetCode();
-  } else {
-    ICCompareStub stub(op_, state);
-    if (state == KNOWN_OBJECTS) {
-      stub.set_known_map(Handle<Map>(Handle<JSObject>::cast(x)->map()));
-    }
-    rewritten = stub.GetCode();
-  }
-  set_target(*rewritten);
-
-#ifdef DEBUG
-  if (FLAG_trace_ic) {
-    PrintF("[CompareIC (%s->%s)#%s]\n",
-           GetStateName(previous_state),
-           GetStateName(state),
-           Token::Name(op_));
-  }
-#endif
+bool CompareIC::HasInlinedSmiCode(Address address) {
+  // The address of the instruction following the call.
+  Address andi_instruction_address =
+      address + Assembler::kCallTargetAddressOffset;
 
-  // Activate inlined smi code.
-  if (previous_state == UNINITIALIZED) {
-    PatchInlinedSmiCode(address(), ENABLE_INLINED_SMI_CHECK);
-  }
+  // If the instruction following the call is not a andi at, rx, #yyy, nothing
+  // was inlined.
+  Instr instr = Assembler::instr_at(andi_instruction_address);
+  return Assembler::IsAndImmediate(instr) &&
+      Assembler::GetRt(instr) == (uint32_t)zero_reg.code();
 }
 
 
diff --git a/deps/v8/src/mips/lithium-codegen-mips.cc b/deps/v8/src/mips/lithium-codegen-mips.cc
index db9748a4ae..22352e1184 100644
--- a/deps/v8/src/mips/lithium-codegen-mips.cc
+++ b/deps/v8/src/mips/lithium-codegen-mips.cc
@@ -144,7 +144,13 @@ bool LCodeGen::GeneratePrologue() {
     __ bind(&ok);
   }
 
+  info()->set_prologue_offset(masm_->pc_offset());
+  // The following three instructions must remain together and unmodified for
+  // code aging to work properly.
   __ Push(ra, fp, cp, a1);
+  // Add unused load of ip to ensure prologue sequence is identical for
+  // full-codegen and lithium-codegen.
+  __ LoadRoot(at, Heap::kUndefinedValueRootIndex);
   __ Addu(fp, sp, Operand(2 * kPointerSize));  // Adj. FP to point to saved FP.
 
   // Reserve space for the stack slots needed by the code.
@@ -221,7 +227,30 @@ bool LCodeGen::GenerateBody() {
     }
 
     if (emit_instructions) {
-      Comment(";;; @%d: %s.", current_instruction_, instr->Mnemonic());
+      if (FLAG_code_comments) {
+        HValue* hydrogen = instr->hydrogen_value();
+        if (hydrogen != NULL) {
+          if (hydrogen->IsChange()) {
+            HValue* changed_value = HChange::cast(hydrogen)->value();
+            int use_id = 0;
+            const char* use_mnemo = "dead";
+            if (hydrogen->UseCount() >= 1) {
+              HValue* use_value = hydrogen->uses().value();
+              use_id = use_value->id();
+              use_mnemo = use_value->Mnemonic();
+            }
+            Comment(";;; @%d: %s. <of #%d %s for #%d %s>",
+                    current_instruction_, instr->Mnemonic(),
+                    changed_value->id(), changed_value->Mnemonic(),
+                    use_id, use_mnemo);
+          } else {
+            Comment(";;; @%d: %s. <#%d>", current_instruction_,
+                    instr->Mnemonic(), hydrogen->id());
+          }
+        } else {
+          Comment(";;; @%d: %s.", current_instruction_, instr->Mnemonic());
+        }
+      }
       instr->CompileToNative(this);
     }
   }
@@ -432,7 +461,9 @@ MemOperand LCodeGen::ToHighMemOperand(LOperand* op) const {
 
 
 void LCodeGen::WriteTranslation(LEnvironment* environment,
-                                Translation* translation) {
+                                Translation* translation,
+                                int* arguments_index,
+                                int* arguments_count) {
   if (environment == NULL) return;
 
   // The translation includes one command per value in the environment.
@@ -440,7 +471,17 @@ void LCodeGen::WriteTranslation(LEnvironment* environment,
   // The output frame height does not include the parameters.
   int height = translation_size - environment->parameter_count();
 
-  WriteTranslation(environment->outer(), translation);
+  // Function parameters are arguments to the outermost environment. The
+  // arguments index points to the first element of a sequence of tagged
+  // values on the stack that represent the arguments. This needs to be
+  // kept in sync with the LArgumentsElements implementation.
+  *arguments_index = -environment->parameter_count();
+  *arguments_count = environment->parameter_count();
+
+  WriteTranslation(environment->outer(),
+                   translation,
+                   arguments_index,
+                   arguments_count);
   int closure_id = *info()->closure() != *environment->closure()
       ? DefineDeoptimizationLiteral(environment->closure())
       : Translation::kSelfLiteralId;
@@ -466,6 +507,17 @@ void LCodeGen::WriteTranslation(LEnvironment* environment,
       translation->BeginArgumentsAdaptorFrame(closure_id, translation_size);
       break;
   }
+
+  // Inlined frames which push their arguments cause the index to be
+  // bumped and a new stack area to be used for materialization.
+  if (environment->entry() != NULL &&
+      environment->entry()->arguments_pushed()) {
+    *arguments_index = *arguments_index < 0
+        ? GetStackSlotCount()
+        : *arguments_index + *arguments_count;
+    *arguments_count = environment->entry()->arguments_count() + 1;
+  }
+
   for (int i = 0; i < translation_size; ++i) {
     LOperand* value = environment->values()->at(i);
     // spilled_registers_ and spilled_double_registers_ are either
@@ -477,7 +529,9 @@ void LCodeGen::WriteTranslation(LEnvironment* environment,
         AddToTranslation(translation,
                          environment->spilled_registers()[value->index()],
                          environment->HasTaggedValueAt(i),
-                         environment->HasUint32ValueAt(i));
+                         environment->HasUint32ValueAt(i),
+                         *arguments_index,
+                         *arguments_count);
       } else if (
           value->IsDoubleRegister() &&
           environment->spilled_double_registers()[value->index()] != NULL) {
@@ -486,14 +540,18 @@ void LCodeGen::WriteTranslation(LEnvironment* environment,
             translation,
             environment->spilled_double_registers()[value->index()],
             false,
-            false);
+            false,
+            *arguments_index,
+            *arguments_count);
       }
     }
 
     AddToTranslation(translation,
                      value,
                      environment->HasTaggedValueAt(i),
-                     environment->HasUint32ValueAt(i));
+                     environment->HasUint32ValueAt(i),
+                     *arguments_index,
+                     *arguments_count);
   }
 }
 
@@ -501,12 +559,14 @@ void LCodeGen::WriteTranslation(LEnvironment* environment,
 void LCodeGen::AddToTranslation(Translation* translation,
                                 LOperand* op,
                                 bool is_tagged,
-                                bool is_uint32) {
+                                bool is_uint32,
+                                int arguments_index,
+                                int arguments_count) {
   if (op == NULL) {
     // TODO(twuerthinger): Introduce marker operands to indicate that this value
     // is not present and must be reconstructed from the deoptimizer. Currently
     // this is only used for the arguments object.
-    translation->StoreArgumentsObject();
+    translation->StoreArgumentsObject(arguments_index, arguments_count);
   } else if (op->IsStackSlot()) {
     if (is_tagged) {
       translation->StoreStackSlot(op->index());
@@ -602,6 +662,8 @@ void LCodeGen::RegisterEnvironmentForDeoptimization(LEnvironment* environment,
 
     int frame_count = 0;
     int jsframe_count = 0;
+    int args_index = 0;
+    int args_count = 0;
     for (LEnvironment* e = environment; e != NULL; e = e->outer()) {
       ++frame_count;
       if (e->frame_type() == JS_FUNCTION) {
@@ -609,7 +671,7 @@ void LCodeGen::RegisterEnvironmentForDeoptimization(LEnvironment* environment,
       }
     }
     Translation translation(&translations_, frame_count, jsframe_count, zone());
-    WriteTranslation(environment, &translation);
+    WriteTranslation(environment, &translation, &args_index, &args_count);
     int deoptimization_index = deoptimizations_.length();
     int pc_offset = masm()->pc_offset();
     environment->Register(deoptimization_index,
@@ -878,7 +940,7 @@ void LCodeGen::DoUnknownOSRValue(LUnknownOSRValue* instr) {
 
 void LCodeGen::DoModI(LModI* instr) {
   Register scratch = scratch0();
-  const Register left = ToRegister(instr->InputAt(0));
+  const Register left = ToRegister(instr->left());
   const Register result = ToRegister(instr->result());
 
   Label done;
@@ -906,7 +968,7 @@ void LCodeGen::DoModI(LModI* instr) {
     __ And(result, scratch, p2constant - 1);
   } else {
     // div runs in the background while we check for special cases.
-    Register right = EmitLoadRegister(instr->InputAt(1), scratch);
+    Register right = EmitLoadRegister(instr->right(), scratch);
     __ div(left, right);
 
     // Check for x % 0.
@@ -926,8 +988,8 @@ void LCodeGen::DoModI(LModI* instr) {
 
 
 void LCodeGen::DoDivI(LDivI* instr) {
-  const Register left = ToRegister(instr->InputAt(0));
-  const Register right = ToRegister(instr->InputAt(1));
+  const Register left = ToRegister(instr->left());
+  const Register right = ToRegister(instr->right());
   const Register result = ToRegister(instr->result());
 
   // On MIPS div is asynchronous - it will run in the background while we
@@ -965,8 +1027,8 @@ void LCodeGen::DoMulI(LMulI* instr) {
   Register scratch = scratch0();
   Register result = ToRegister(instr->result());
   // Note that result may alias left.
-  Register left = ToRegister(instr->InputAt(0));
-  LOperand* right_op = instr->InputAt(1);
+  Register left = ToRegister(instr->left());
+  LOperand* right_op = instr->right();
 
   bool can_overflow = instr->hydrogen()->CheckFlag(HValue::kCanOverflow);
   bool bailout_on_minus_zero =
@@ -1036,7 +1098,7 @@ void LCodeGen::DoMulI(LMulI* instr) {
   } else {
     Register right = EmitLoadRegister(right_op, scratch);
     if (bailout_on_minus_zero) {
-      __ Or(ToRegister(instr->TempAt(0)), left, right);
+      __ Or(ToRegister(instr->temp()), left, right);
     }
 
     if (can_overflow) {
@@ -1056,7 +1118,7 @@ void LCodeGen::DoMulI(LMulI* instr) {
       __ Branch(&done, ne, result, Operand(zero_reg));
       DeoptimizeIf(lt,
                    instr->environment(),
-                   ToRegister(instr->TempAt(0)),
+                   ToRegister(instr->temp()),
                    Operand(zero_reg));
       __ bind(&done);
     }
@@ -1065,8 +1127,8 @@ void LCodeGen::DoMulI(LMulI* instr) {
 
 
 void LCodeGen::DoBitI(LBitI* instr) {
-  LOperand* left_op = instr->InputAt(0);
-  LOperand* right_op = instr->InputAt(1);
+  LOperand* left_op = instr->left();
+  LOperand* right_op = instr->right();
   ASSERT(left_op->IsRegister());
   Register left = ToRegister(left_op);
   Register result = ToRegister(instr->result());
@@ -1099,14 +1161,17 @@ void LCodeGen::DoBitI(LBitI* instr) {
 void LCodeGen::DoShiftI(LShiftI* instr) {
   // Both 'left' and 'right' are "used at start" (see LCodeGen::DoShift), so
   // result may alias either of them.
-  LOperand* right_op = instr->InputAt(1);
-  Register left = ToRegister(instr->InputAt(0));
+  LOperand* right_op = instr->right();
+  Register left = ToRegister(instr->left());
   Register result = ToRegister(instr->result());
 
   if (right_op->IsRegister()) {
     // No need to mask the right operand on MIPS, it is built into the variable
     // shift instructions.
     switch (instr->op()) {
+      case Token::ROR:
+        __ Ror(result, left, Operand(ToRegister(right_op)));
+        break;
       case Token::SAR:
         __ srav(result, left, ToRegister(right_op));
         break;
@@ -1128,6 +1193,13 @@ void LCodeGen::DoShiftI(LShiftI* instr) {
     int value = ToInteger32(LConstantOperand::cast(right_op));
     uint8_t shift_count = static_cast<uint8_t>(value & 0x1F);
     switch (instr->op()) {
+      case Token::ROR:
+        if (shift_count != 0) {
+          __ Ror(result, left, Operand(shift_count));
+        } else {
+          __ Move(result, left);
+        }
+        break;
       case Token::SAR:
         if (shift_count != 0) {
           __ sra(result, left, shift_count);
@@ -1162,8 +1234,8 @@ void LCodeGen::DoShiftI(LShiftI* instr) {
 
 
 void LCodeGen::DoSubI(LSubI* instr) {
-  LOperand* left = instr->InputAt(0);
-  LOperand* right = instr->InputAt(1);
+  LOperand* left = instr->left();
+  LOperand* right = instr->right();
   LOperand* result = instr->result();
   bool can_overflow = instr->hydrogen()->CheckFlag(HValue::kCanOverflow);
 
@@ -1227,28 +1299,28 @@ void LCodeGen::DoConstantT(LConstantT* instr) {
 
 void LCodeGen::DoJSArrayLength(LJSArrayLength* instr) {
   Register result = ToRegister(instr->result());
-  Register array = ToRegister(instr->InputAt(0));
+  Register array = ToRegister(instr->value());
   __ lw(result, FieldMemOperand(array, JSArray::kLengthOffset));
 }
 
 
 void LCodeGen::DoFixedArrayBaseLength(LFixedArrayBaseLength* instr) {
   Register result = ToRegister(instr->result());
-  Register array = ToRegister(instr->InputAt(0));
+  Register array = ToRegister(instr->value());
   __ lw(result, FieldMemOperand(array, FixedArrayBase::kLengthOffset));
 }
 
 
 void LCodeGen::DoMapEnumLength(LMapEnumLength* instr) {
   Register result = ToRegister(instr->result());
-  Register map = ToRegister(instr->InputAt(0));
+  Register map = ToRegister(instr->value());
   __ EnumLength(result, map);
 }
 
 
 void LCodeGen::DoElementsKind(LElementsKind* instr) {
   Register result = ToRegister(instr->result());
-  Register input = ToRegister(instr->InputAt(0));
+  Register input = ToRegister(instr->value());
 
   // Load map into |result|.
   __ lw(result, FieldMemOperand(input, HeapObject::kMapOffset));
@@ -1261,9 +1333,9 @@ void LCodeGen::DoElementsKind(LElementsKind* instr) {
 
 
 void LCodeGen::DoValueOf(LValueOf* instr) {
-  Register input = ToRegister(instr->InputAt(0));
+  Register input = ToRegister(instr->value());
   Register result = ToRegister(instr->result());
-  Register map = ToRegister(instr->TempAt(0));
+  Register map = ToRegister(instr->temp());
   Label done;
 
   // If the object is a smi return the object.
@@ -1280,9 +1352,9 @@ void LCodeGen::DoValueOf(LValueOf* instr) {
 
 
 void LCodeGen::DoDateField(LDateField* instr) {
-  Register object = ToRegister(instr->InputAt(0));
+  Register object = ToRegister(instr->date());
   Register result = ToRegister(instr->result());
-  Register scratch = ToRegister(instr->TempAt(0));
+  Register scratch = ToRegister(instr->temp());
   Smi* index = instr->index();
   Label runtime, done;
   ASSERT(object.is(a0));
@@ -1318,14 +1390,14 @@ void LCodeGen::DoDateField(LDateField* instr) {
 
 
 void LCodeGen::DoBitNotI(LBitNotI* instr) {
-  Register input = ToRegister(instr->InputAt(0));
+  Register input = ToRegister(instr->value());
   Register result = ToRegister(instr->result());
   __ Nor(result, zero_reg, Operand(input));
 }
 
 
 void LCodeGen::DoThrow(LThrow* instr) {
-  Register input_reg = EmitLoadRegister(instr->InputAt(0), at);
+  Register input_reg = EmitLoadRegister(instr->value(), at);
   __ push(input_reg);
   CallRuntime(Runtime::kThrow, 1, instr);
 
@@ -1336,8 +1408,8 @@ void LCodeGen::DoThrow(LThrow* instr) {
 
 
 void LCodeGen::DoAddI(LAddI* instr) {
-  LOperand* left = instr->InputAt(0);
-  LOperand* right = instr->InputAt(1);
+  LOperand* left = instr->left();
+  LOperand* right = instr->right();
   LOperand* result = instr->result();
   bool can_overflow = instr->hydrogen()->CheckFlag(HValue::kCanOverflow);
 
@@ -1375,8 +1447,8 @@ void LCodeGen::DoAddI(LAddI* instr) {
 
 
 void LCodeGen::DoMathMinMax(LMathMinMax* instr) {
-  LOperand* left = instr->InputAt(0);
-  LOperand* right = instr->InputAt(1);
+  LOperand* left = instr->left();
+  LOperand* right = instr->right();
   HMathMinMax::Operation operation = instr->hydrogen()->operation();
   Condition condition = (operation == HMathMinMax::kMathMin) ? le : ge;
   if (instr->hydrogen()->representation().IsInteger32()) {
@@ -1437,8 +1509,8 @@ void LCodeGen::DoMathMinMax(LMathMinMax* instr) {
 
 
 void LCodeGen::DoArithmeticD(LArithmeticD* instr) {
-  DoubleRegister left = ToDoubleRegister(instr->InputAt(0));
-  DoubleRegister right = ToDoubleRegister(instr->InputAt(1));
+  DoubleRegister left = ToDoubleRegister(instr->left());
+  DoubleRegister right = ToDoubleRegister(instr->right());
   DoubleRegister result = ToDoubleRegister(instr->result());
   switch (instr->op()) {
     case Token::ADD:
@@ -1478,8 +1550,8 @@ void LCodeGen::DoArithmeticD(LArithmeticD* instr) {
 
 
 void LCodeGen::DoArithmeticT(LArithmeticT* instr) {
-  ASSERT(ToRegister(instr->InputAt(0)).is(a1));
-  ASSERT(ToRegister(instr->InputAt(1)).is(a0));
+  ASSERT(ToRegister(instr->left()).is(a1));
+  ASSERT(ToRegister(instr->right()).is(a0));
   ASSERT(ToRegister(instr->result()).is(v0));
 
   BinaryOpStub stub(instr->op(), NO_OVERWRITE);
@@ -1543,15 +1615,15 @@ void LCodeGen::DoBranch(LBranch* instr) {
 
   Representation r = instr->hydrogen()->value()->representation();
   if (r.IsInteger32()) {
-    Register reg = ToRegister(instr->InputAt(0));
+    Register reg = ToRegister(instr->value());
     EmitBranch(true_block, false_block, ne, reg, Operand(zero_reg));
   } else if (r.IsDouble()) {
-    DoubleRegister reg = ToDoubleRegister(instr->InputAt(0));
+    DoubleRegister reg = ToDoubleRegister(instr->value());
     // Test the double value. Zero and NaN are false.
     EmitBranchF(true_block, false_block, ne, reg, kDoubleRegZero);
   } else {
     ASSERT(r.IsTagged());
-    Register reg = ToRegister(instr->InputAt(0));
+    Register reg = ToRegister(instr->value());
     HType type = instr->hydrogen()->value()->type();
     if (type.IsBoolean()) {
       __ LoadRoot(at, Heap::kTrueValueRootIndex);
@@ -1685,8 +1757,8 @@ Condition LCodeGen::TokenToCondition(Token::Value op, bool is_unsigned) {
 
 
 void LCodeGen::DoCmpIDAndBranch(LCmpIDAndBranch* instr) {
-  LOperand* left = instr->InputAt(0);
-  LOperand* right = instr->InputAt(1);
+  LOperand* left = instr->left();
+  LOperand* right = instr->right();
   int false_block = chunk_->LookupDestination(instr->false_block_id());
   int true_block = chunk_->LookupDestination(instr->true_block_id());
 
@@ -1737,8 +1809,8 @@ void LCodeGen::DoCmpIDAndBranch(LCmpIDAndBranch* instr) {
 
 
 void LCodeGen::DoCmpObjectEqAndBranch(LCmpObjectEqAndBranch* instr) {
-  Register left = ToRegister(instr->InputAt(0));
-  Register right = ToRegister(instr->InputAt(1));
+  Register left = ToRegister(instr->left());
+  Register right = ToRegister(instr->right());
   int false_block = chunk_->LookupDestination(instr->false_block_id());
   int true_block = chunk_->LookupDestination(instr->true_block_id());
 
@@ -1747,7 +1819,7 @@ void LCodeGen::DoCmpObjectEqAndBranch(LCmpObjectEqAndBranch* instr) {
 
 
 void LCodeGen::DoCmpConstantEqAndBranch(LCmpConstantEqAndBranch* instr) {
-  Register left = ToRegister(instr->InputAt(0));
+  Register left = ToRegister(instr->left());
   int true_block = chunk_->LookupDestination(instr->true_block_id());
   int false_block = chunk_->LookupDestination(instr->false_block_id());
 
@@ -1759,7 +1831,7 @@ void LCodeGen::DoCmpConstantEqAndBranch(LCmpConstantEqAndBranch* instr) {
 
 void LCodeGen::DoIsNilAndBranch(LIsNilAndBranch* instr) {
   Register scratch = scratch0();
-  Register reg = ToRegister(instr->InputAt(0));
+  Register reg = ToRegister(instr->value());
   int false_block = chunk_->LookupDestination(instr->false_block_id());
 
   // If the expression is known to be untagged or a smi, then it's definitely
@@ -1825,8 +1897,8 @@ Condition LCodeGen::EmitIsObject(Register input,
 
 
 void LCodeGen::DoIsObjectAndBranch(LIsObjectAndBranch* instr) {
-  Register reg = ToRegister(instr->InputAt(0));
-  Register temp1 = ToRegister(instr->TempAt(0));
+  Register reg = ToRegister(instr->value());
+  Register temp1 = ToRegister(instr->temp());
   Register temp2 = scratch0();
 
   int true_block = chunk_->LookupDestination(instr->true_block_id());
@@ -1853,8 +1925,8 @@ Condition LCodeGen::EmitIsString(Register input,
 
 
 void LCodeGen::DoIsStringAndBranch(LIsStringAndBranch* instr) {
-  Register reg = ToRegister(instr->InputAt(0));
-  Register temp1 = ToRegister(instr->TempAt(0));
+  Register reg = ToRegister(instr->value());
+  Register temp1 = ToRegister(instr->temp());
 
   int true_block = chunk_->LookupDestination(instr->true_block_id());
   int false_block = chunk_->LookupDestination(instr->false_block_id());
@@ -1872,15 +1944,15 @@ void LCodeGen::DoIsSmiAndBranch(LIsSmiAndBranch* instr) {
   int true_block = chunk_->LookupDestination(instr->true_block_id());
   int false_block = chunk_->LookupDestination(instr->false_block_id());
 
-  Register input_reg = EmitLoadRegister(instr->InputAt(0), at);
+  Register input_reg = EmitLoadRegister(instr->value(), at);
   __ And(at, input_reg, kSmiTagMask);
   EmitBranch(true_block, false_block, eq, at, Operand(zero_reg));
 }
 
 
 void LCodeGen::DoIsUndetectableAndBranch(LIsUndetectableAndBranch* instr) {
-  Register input = ToRegister(instr->InputAt(0));
-  Register temp = ToRegister(instr->TempAt(0));
+  Register input = ToRegister(instr->value());
+  Register temp = ToRegister(instr->temp());
 
   int true_block = chunk_->LookupDestination(instr->true_block_id());
   int false_block = chunk_->LookupDestination(instr->false_block_id());
@@ -1949,7 +2021,7 @@ static Condition BranchCondition(HHasInstanceTypeAndBranch* instr) {
 
 void LCodeGen::DoHasInstanceTypeAndBranch(LHasInstanceTypeAndBranch* instr) {
   Register scratch = scratch0();
-  Register input = ToRegister(instr->InputAt(0));
+  Register input = ToRegister(instr->value());
 
   int true_block = chunk_->LookupDestination(instr->true_block_id());
   int false_block = chunk_->LookupDestination(instr->false_block_id());
@@ -1968,10 +2040,10 @@ void LCodeGen::DoHasInstanceTypeAndBranch(LHasInstanceTypeAndBranch* instr) {
 
 
 void LCodeGen::DoGetCachedArrayIndex(LGetCachedArrayIndex* instr) {
-  Register input = ToRegister(instr->InputAt(0));
+  Register input = ToRegister(instr->value());
   Register result = ToRegister(instr->result());
 
-  __ AbortIfNotString(input);
+  __ AssertString(input);
 
   __ lw(result, FieldMemOperand(input, String::kHashFieldOffset));
   __ IndexFromHash(result, result);
@@ -1980,7 +2052,7 @@ void LCodeGen::DoGetCachedArrayIndex(LGetCachedArrayIndex* instr) {
 
 void LCodeGen::DoHasCachedArrayIndexAndBranch(
     LHasCachedArrayIndexAndBranch* instr) {
-  Register input = ToRegister(instr->InputAt(0));
+  Register input = ToRegister(instr->value());
   Register scratch = scratch0();
 
   int true_block = chunk_->LookupDestination(instr->true_block_id());
@@ -2060,9 +2132,9 @@ void LCodeGen::EmitClassOfTest(Label* is_true,
 
 
 void LCodeGen::DoClassOfTestAndBranch(LClassOfTestAndBranch* instr) {
-  Register input = ToRegister(instr->InputAt(0));
+  Register input = ToRegister(instr->value());
   Register temp = scratch0();
-  Register temp2 = ToRegister(instr->TempAt(0));
+  Register temp2 = ToRegister(instr->temp());
   Handle<String> class_name = instr->hydrogen()->class_name();
 
   int true_block = chunk_->LookupDestination(instr->true_block_id());
@@ -2078,8 +2150,8 @@ void LCodeGen::DoClassOfTestAndBranch(LClassOfTestAndBranch* instr) {
 
 
 void LCodeGen::DoCmpMapAndBranch(LCmpMapAndBranch* instr) {
-  Register reg = ToRegister(instr->InputAt(0));
-  Register temp = ToRegister(instr->TempAt(0));
+  Register reg = ToRegister(instr->value());
+  Register temp = ToRegister(instr->temp());
   int true_block = instr->true_block_id();
   int false_block = instr->false_block_id();
 
@@ -2090,8 +2162,8 @@ void LCodeGen::DoCmpMapAndBranch(LCmpMapAndBranch* instr) {
 
 void LCodeGen::DoInstanceOf(LInstanceOf* instr) {
   Label true_label, done;
-  ASSERT(ToRegister(instr->InputAt(0)).is(a0));  // Object is in a0.
-  ASSERT(ToRegister(instr->InputAt(1)).is(a1));  // Function is in a1.
+  ASSERT(ToRegister(instr->left()).is(a0));  // Object is in a0.
+  ASSERT(ToRegister(instr->right()).is(a1));  // Function is in a1.
   Register result = ToRegister(instr->result());
   ASSERT(result.is(v0));
 
@@ -2128,8 +2200,8 @@ void LCodeGen::DoInstanceOfKnownGlobal(LInstanceOfKnownGlobal* instr) {
   deferred = new(zone()) DeferredInstanceOfKnownGlobal(this, instr);
 
   Label done, false_result;
-  Register object = ToRegister(instr->InputAt(0));
-  Register temp = ToRegister(instr->TempAt(0));
+  Register object = ToRegister(instr->value());
+  Register temp = ToRegister(instr->temp());
   Register result = ToRegister(instr->result());
 
   ASSERT(object.is(a0));
@@ -2204,7 +2276,7 @@ void LCodeGen::DoDeferredInstanceOfKnownGlobal(LInstanceOfKnownGlobal* instr,
   // Get the temp register reserved by the instruction. This needs to be t0 as
   // its slot of the pushing of safepoint registers is used to communicate the
   // offset to the location of the map check.
-  Register temp = ToRegister(instr->TempAt(0));
+  Register temp = ToRegister(instr->temp());
   ASSERT(temp.is(t0));
   __ LoadHeapObject(InstanceofStub::right(), instr->function());
   static const int kAdditionalDelta = 7;
@@ -2299,7 +2371,7 @@ void LCodeGen::DoStoreGlobalCell(LStoreGlobalCell* instr) {
   // it as no longer deleted.
   if (instr->hydrogen()->RequiresHoleCheck()) {
     // We use a temp to check the payload.
-    Register payload = ToRegister(instr->TempAt(0));
+    Register payload = ToRegister(instr->temp());
     __ lw(payload, FieldMemOperand(cell, JSGlobalPropertyCell::kValueOffset));
     __ LoadRoot(at, Heap::kTheHoleValueRootIndex);
     DeoptimizeIf(eq, instr->environment(), payload, Operand(at));
@@ -2382,7 +2454,7 @@ void LCodeGen::DoStoreContextSlot(LStoreContextSlot* instr) {
 
 
 void LCodeGen::DoLoadNamedField(LLoadNamedField* instr) {
-  Register object = ToRegister(instr->InputAt(0));
+  Register object = ToRegister(instr->object());
   Register result = ToRegister(instr->result());
   if (instr->hydrogen()->is_in_object()) {
     __ lw(result, FieldMemOperand(object, instr->hydrogen()->offset()));
@@ -2535,7 +2607,7 @@ void LCodeGen::DoLoadFunctionPrototype(LLoadFunctionPrototype* instr) {
 
 void LCodeGen::DoLoadElements(LLoadElements* instr) {
   Register result = ToRegister(instr->result());
-  Register input = ToRegister(instr->InputAt(0));
+  Register input = ToRegister(instr->object());
   Register scratch = scratch0();
 
   __ lw(result, FieldMemOperand(input, JSObject::kElementsOffset));
@@ -2568,7 +2640,7 @@ void LCodeGen::DoLoadElements(LLoadElements* instr) {
 void LCodeGen::DoLoadExternalArrayPointer(
     LLoadExternalArrayPointer* instr) {
   Register to_reg = ToRegister(instr->result());
-  Register from_reg  = ToRegister(instr->InputAt(0));
+  Register from_reg  = ToRegister(instr->object());
   __ lw(to_reg, FieldMemOperand(from_reg,
                                 ExternalArray::kExternalPointerOffset));
 }
@@ -2579,14 +2651,6 @@ void LCodeGen::DoAccessArgumentsAt(LAccessArgumentsAt* instr) {
   Register length = ToRegister(instr->length());
   Register index = ToRegister(instr->index());
   Register result = ToRegister(instr->result());
-
-  // Bailout index is not a valid argument index. Use unsigned check to get
-  // negative check for free.
-
-  // TODO(plind): Shoud be optimized to do the sub before the DeoptimizeIf(),
-  // as they do in Arm. It will save us an instruction.
-  DeoptimizeIf(ls, instr->environment(), length, Operand(index));
-
   // There are two words between the frame pointer and the last argument.
   // Subtracting from length accounts for one of them, add one more.
   __ subu(length, length, index);
@@ -2597,50 +2661,89 @@ void LCodeGen::DoAccessArgumentsAt(LAccessArgumentsAt* instr) {
 }
 
 
-void LCodeGen::DoLoadKeyedFastElement(LLoadKeyedFastElement* instr) {
-  Register elements = ToRegister(instr->elements());
-  Register result = ToRegister(instr->result());
-  Register scratch = scratch0();
-  Register store_base = scratch;
-  int offset = 0;
-
-  if (instr->key()->IsConstantOperand()) {
-    LConstantOperand* const_operand = LConstantOperand::cast(instr->key());
-    offset = FixedArray::OffsetOfElementAt(ToInteger32(const_operand) +
-                                           instr->additional_index());
-    store_base = elements;
-  } else {
-    Register key = EmitLoadRegister(instr->key(), scratch);
-    // Even though the HLoadKeyedFastElement instruction forces the input
-    // representation for the key to be an integer, the input gets replaced
-    // during bound check elimination with the index argument to the bounds
-    // check, which can be tagged, so that case must be handled here, too.
-    if (instr->hydrogen()->key()->representation().IsTagged()) {
-      __ sll(scratch, key, kPointerSizeLog2 - kSmiTagSize);
-      __ addu(scratch, elements, scratch);
-    } else {
-      __ sll(scratch, key, kPointerSizeLog2);
-      __ addu(scratch, elements, scratch);
+void LCodeGen::DoLoadKeyedExternalArray(LLoadKeyed* instr) {
+  Register external_pointer = ToRegister(instr->elements());
+  Register key = no_reg;
+  ElementsKind elements_kind = instr->elements_kind();
+  bool key_is_constant = instr->key()->IsConstantOperand();
+  int constant_key = 0;
+  if (key_is_constant) {
+    constant_key = ToInteger32(LConstantOperand::cast(instr->key()));
+    if (constant_key & 0xF0000000) {
+      Abort("array index constant value too big.");
     }
-    offset = FixedArray::OffsetOfElementAt(instr->additional_index());
+  } else {
+    key = ToRegister(instr->key());
   }
-  __ lw(result, FieldMemOperand(store_base, offset));
+  int element_size_shift = ElementsKindToShiftSize(elements_kind);
+  int shift_size = (instr->hydrogen()->key()->representation().IsTagged())
+      ? (element_size_shift - kSmiTagSize) : element_size_shift;
+  int additional_offset = instr->additional_index() << element_size_shift;
 
-  // Check for the hole value.
-  if (instr->hydrogen()->RequiresHoleCheck()) {
-    if (IsFastSmiElementsKind(instr->hydrogen()->elements_kind())) {
-      __ And(scratch, result, Operand(kSmiTagMask));
-      DeoptimizeIf(ne, instr->environment(), scratch, Operand(zero_reg));
+  if (elements_kind == EXTERNAL_FLOAT_ELEMENTS ||
+      elements_kind == EXTERNAL_DOUBLE_ELEMENTS) {
+    FPURegister result = ToDoubleRegister(instr->result());
+    if (key_is_constant) {
+      __ Addu(scratch0(), external_pointer, constant_key << element_size_shift);
     } else {
-      __ LoadRoot(scratch, Heap::kTheHoleValueRootIndex);
-      DeoptimizeIf(eq, instr->environment(), result, Operand(scratch));
+      __ sll(scratch0(), key, shift_size);
+      __ Addu(scratch0(), scratch0(), external_pointer);
+    }
+
+    if (elements_kind == EXTERNAL_FLOAT_ELEMENTS) {
+      __ lwc1(result, MemOperand(scratch0(), additional_offset));
+      __ cvt_d_s(result, result);
+    } else  {  // i.e. elements_kind == EXTERNAL_DOUBLE_ELEMENTS
+      __ ldc1(result, MemOperand(scratch0(), additional_offset));
+    }
+  } else {
+    Register result = ToRegister(instr->result());
+    MemOperand mem_operand = PrepareKeyedOperand(
+        key, external_pointer, key_is_constant, constant_key,
+        element_size_shift, shift_size,
+        instr->additional_index(), additional_offset);
+    switch (elements_kind) {
+      case EXTERNAL_BYTE_ELEMENTS:
+        __ lb(result, mem_operand);
+        break;
+      case EXTERNAL_PIXEL_ELEMENTS:
+      case EXTERNAL_UNSIGNED_BYTE_ELEMENTS:
+        __ lbu(result, mem_operand);
+        break;
+      case EXTERNAL_SHORT_ELEMENTS:
+        __ lh(result, mem_operand);
+        break;
+      case EXTERNAL_UNSIGNED_SHORT_ELEMENTS:
+        __ lhu(result, mem_operand);
+        break;
+      case EXTERNAL_INT_ELEMENTS:
+        __ lw(result, mem_operand);
+        break;
+      case EXTERNAL_UNSIGNED_INT_ELEMENTS:
+        __ lw(result, mem_operand);
+        if (!instr->hydrogen()->CheckFlag(HInstruction::kUint32)) {
+          DeoptimizeIf(Ugreater_equal, instr->environment(),
+              result, Operand(0x80000000));
+        }
+        break;
+      case EXTERNAL_FLOAT_ELEMENTS:
+      case EXTERNAL_DOUBLE_ELEMENTS:
+      case FAST_DOUBLE_ELEMENTS:
+      case FAST_ELEMENTS:
+      case FAST_SMI_ELEMENTS:
+      case FAST_HOLEY_DOUBLE_ELEMENTS:
+      case FAST_HOLEY_ELEMENTS:
+      case FAST_HOLEY_SMI_ELEMENTS:
+      case DICTIONARY_ELEMENTS:
+      case NON_STRICT_ARGUMENTS_ELEMENTS:
+        UNREACHABLE();
+        break;
     }
   }
 }
 
 
-void LCodeGen::DoLoadKeyedFastDoubleElement(
-    LLoadKeyedFastDoubleElement* instr) {
+void LCodeGen::DoLoadKeyedFixedDoubleArray(LLoadKeyed* instr) {
   Register elements = ToRegister(instr->elements());
   bool key_is_constant = instr->key()->IsConstantOperand();
   Register key = no_reg;
@@ -2682,6 +2785,59 @@ void LCodeGen::DoLoadKeyedFastDoubleElement(
 }
 
 
+void LCodeGen::DoLoadKeyedFixedArray(LLoadKeyed* instr) {
+  Register elements = ToRegister(instr->elements());
+  Register result = ToRegister(instr->result());
+  Register scratch = scratch0();
+  Register store_base = scratch;
+  int offset = 0;
+
+  if (instr->key()->IsConstantOperand()) {
+    LConstantOperand* const_operand = LConstantOperand::cast(instr->key());
+    offset = FixedArray::OffsetOfElementAt(ToInteger32(const_operand) +
+                                           instr->additional_index());
+    store_base = elements;
+  } else {
+    Register key = EmitLoadRegister(instr->key(), scratch0());
+    // Even though the HLoadKeyed instruction forces the input
+    // representation for the key to be an integer, the input gets replaced
+    // during bound check elimination with the index argument to the bounds
+    // check, which can be tagged, so that case must be handled here, too.
+    if (instr->hydrogen()->key()->representation().IsTagged()) {
+      __ sll(scratch, key, kPointerSizeLog2 - kSmiTagSize);
+      __ addu(scratch, elements, scratch);
+    } else {
+      __ sll(scratch, key, kPointerSizeLog2);
+      __ addu(scratch, elements, scratch);
+    }
+    offset = FixedArray::OffsetOfElementAt(instr->additional_index());
+  }
+  __ lw(result, FieldMemOperand(store_base, offset));
+
+  // Check for the hole value.
+  if (instr->hydrogen()->RequiresHoleCheck()) {
+    if (IsFastSmiElementsKind(instr->hydrogen()->elements_kind())) {
+      __ And(scratch, result, Operand(kSmiTagMask));
+      DeoptimizeIf(ne, instr->environment(), scratch, Operand(zero_reg));
+    } else {
+      __ LoadRoot(scratch, Heap::kTheHoleValueRootIndex);
+      DeoptimizeIf(eq, instr->environment(), result, Operand(scratch));
+    }
+  }
+}
+
+
+void LCodeGen::DoLoadKeyed(LLoadKeyed* instr) {
+  if (instr->is_external()) {
+    DoLoadKeyedExternalArray(instr);
+  } else if (instr->hydrogen()->representation().IsDouble()) {
+    DoLoadKeyedFixedDoubleArray(instr);
+  } else {
+    DoLoadKeyedFixedArray(instr);
+  }
+}
+
+
 MemOperand LCodeGen::PrepareKeyedOperand(Register key,
                                          Register base,
                                          bool key_is_constant,
@@ -2726,89 +2882,6 @@ MemOperand LCodeGen::PrepareKeyedOperand(Register key,
 }
 
 
-void LCodeGen::DoLoadKeyedSpecializedArrayElement(
-    LLoadKeyedSpecializedArrayElement* instr) {
-  Register external_pointer = ToRegister(instr->external_pointer());
-  Register key = no_reg;
-  ElementsKind elements_kind = instr->elements_kind();
-  bool key_is_constant = instr->key()->IsConstantOperand();
-  int constant_key = 0;
-  if (key_is_constant) {
-    constant_key = ToInteger32(LConstantOperand::cast(instr->key()));
-    if (constant_key & 0xF0000000) {
-      Abort("array index constant value too big.");
-    }
-  } else {
-    key = ToRegister(instr->key());
-  }
-  int element_size_shift = ElementsKindToShiftSize(elements_kind);
-  int shift_size = (instr->hydrogen()->key()->representation().IsTagged())
-      ? (element_size_shift - kSmiTagSize) : element_size_shift;
-  int additional_offset = instr->additional_index() << element_size_shift;
-
-  if (elements_kind == EXTERNAL_FLOAT_ELEMENTS ||
-      elements_kind == EXTERNAL_DOUBLE_ELEMENTS) {
-    FPURegister result = ToDoubleRegister(instr->result());
-    if (key_is_constant) {
-      __ Addu(scratch0(), external_pointer, constant_key << element_size_shift);
-    } else {
-      __ sll(scratch0(), key, shift_size);
-      __ Addu(scratch0(), scratch0(), external_pointer);
-    }
-
-    if (elements_kind == EXTERNAL_FLOAT_ELEMENTS) {
-      __ lwc1(result, MemOperand(scratch0(), additional_offset));
-      __ cvt_d_s(result, result);
-    } else  {  // i.e. elements_kind == EXTERNAL_DOUBLE_ELEMENTS
-      __ ldc1(result, MemOperand(scratch0(), additional_offset));
-    }
-  } else {
-    Register result = ToRegister(instr->result());
-    MemOperand mem_operand = PrepareKeyedOperand(
-        key, external_pointer, key_is_constant, constant_key,
-        element_size_shift, shift_size,
-        instr->additional_index(), additional_offset);
-    switch (elements_kind) {
-      case EXTERNAL_BYTE_ELEMENTS:
-        __ lb(result, mem_operand);
-        break;
-      case EXTERNAL_PIXEL_ELEMENTS:
-      case EXTERNAL_UNSIGNED_BYTE_ELEMENTS:
-        __ lbu(result, mem_operand);
-        break;
-      case EXTERNAL_SHORT_ELEMENTS:
-        __ lh(result, mem_operand);
-        break;
-      case EXTERNAL_UNSIGNED_SHORT_ELEMENTS:
-        __ lhu(result, mem_operand);
-        break;
-      case EXTERNAL_INT_ELEMENTS:
-        __ lw(result, mem_operand);
-        break;
-      case EXTERNAL_UNSIGNED_INT_ELEMENTS:
-        __ lw(result, mem_operand);
-        if (!instr->hydrogen()->CheckFlag(HInstruction::kUint32)) {
-          DeoptimizeIf(Ugreater_equal, instr->environment(),
-              result, Operand(0x80000000));
-        }
-        break;
-      case EXTERNAL_FLOAT_ELEMENTS:
-      case EXTERNAL_DOUBLE_ELEMENTS:
-      case FAST_DOUBLE_ELEMENTS:
-      case FAST_ELEMENTS:
-      case FAST_SMI_ELEMENTS:
-      case FAST_HOLEY_DOUBLE_ELEMENTS:
-      case FAST_HOLEY_ELEMENTS:
-      case FAST_HOLEY_SMI_ELEMENTS:
-      case DICTIONARY_ELEMENTS:
-      case NON_STRICT_ARGUMENTS_ELEMENTS:
-        UNREACHABLE();
-        break;
-    }
-  }
-}
-
-
 void LCodeGen::DoLoadKeyedGeneric(LLoadKeyedGeneric* instr) {
   ASSERT(ToRegister(instr->object()).is(a1));
   ASSERT(ToRegister(instr->key()).is(a0));
@@ -2841,7 +2914,7 @@ void LCodeGen::DoArgumentsElements(LArgumentsElements* instr) {
 
 
 void LCodeGen::DoArgumentsLength(LArgumentsLength* instr) {
-  Register elem = ToRegister(instr->InputAt(0));
+  Register elem = ToRegister(instr->elements());
   Register result = ToRegister(instr->result());
 
   Label done;
@@ -2959,7 +3032,7 @@ void LCodeGen::DoApplyArguments(LApplyArguments* instr) {
 
 
 void LCodeGen::DoPushArgument(LPushArgument* instr) {
-  LOperand* argument = instr->InputAt(0);
+  LOperand* argument = instr->value();
   if (argument->IsDoubleRegister() || argument->IsDoubleStackSlot()) {
     Abort("DoPushArgument not implemented for double type.");
   } else {
@@ -3010,7 +3083,7 @@ void LCodeGen::DoGlobalObject(LGlobalObject* instr) {
 
 
 void LCodeGen::DoGlobalReceiver(LGlobalReceiver* instr) {
-  Register global = ToRegister(instr->global());
+  Register global = ToRegister(instr->global_object());
   Register result = ToRegister(instr->result());
   __ lw(result, FieldMemOperand(global, GlobalObject::kGlobalReceiverOffset));
 }
@@ -3071,7 +3144,7 @@ void LCodeGen::DoCallConstantFunction(LCallConstantFunction* instr) {
 
 
 void LCodeGen::DoDeferredMathAbsTaggedHeapNumber(LUnaryMathOperation* instr) {
-  Register input = ToRegister(instr->InputAt(0));
+  Register input = ToRegister(instr->value());
   Register result = ToRegister(instr->result());
   Register scratch = scratch0();
 
@@ -3136,7 +3209,7 @@ void LCodeGen::DoDeferredMathAbsTaggedHeapNumber(LUnaryMathOperation* instr) {
 
 
 void LCodeGen::EmitIntegerMathAbs(LUnaryMathOperation* instr) {
-  Register input = ToRegister(instr->InputAt(0));
+  Register input = ToRegister(instr->value());
   Register result = ToRegister(instr->result());
   Assembler::BlockTrampolinePoolScope block_trampoline_pool(masm_);
   Label done;
@@ -3167,7 +3240,7 @@ void LCodeGen::DoMathAbs(LUnaryMathOperation* instr) {
 
   Representation r = instr->hydrogen()->value()->representation();
   if (r.IsDouble()) {
-    FPURegister input = ToDoubleRegister(instr->InputAt(0));
+    FPURegister input = ToDoubleRegister(instr->value());
     FPURegister result = ToDoubleRegister(instr->result());
     __ abs_d(result, input);
   } else if (r.IsInteger32()) {
@@ -3176,7 +3249,7 @@ void LCodeGen::DoMathAbs(LUnaryMathOperation* instr) {
     // Representation is tagged.
     DeferredMathAbsTaggedHeapNumber* deferred =
         new(zone()) DeferredMathAbsTaggedHeapNumber(this, instr);
-    Register input = ToRegister(instr->InputAt(0));
+    Register input = ToRegister(instr->value());
     // Smi check.
     __ JumpIfNotSmi(input, deferred->entry());
     // If smi, handle it directly.
@@ -3187,24 +3260,21 @@ void LCodeGen::DoMathAbs(LUnaryMathOperation* instr) {
 
 
 void LCodeGen::DoMathFloor(LUnaryMathOperation* instr) {
-  DoubleRegister input = ToDoubleRegister(instr->InputAt(0));
+  DoubleRegister input = ToDoubleRegister(instr->value());
   Register result = ToRegister(instr->result());
-  FPURegister single_scratch = double_scratch0().low();
   Register scratch1 = scratch0();
-  Register except_flag = ToRegister(instr->TempAt(0));
+  Register except_flag = ToRegister(instr->temp());
 
   __ EmitFPUTruncate(kRoundToMinusInf,
-                     single_scratch,
+                     result,
                      input,
                      scratch1,
+                     double_scratch0(),
                      except_flag);
 
   // Deopt if the operation did not succeed.
   DeoptimizeIf(ne, instr->environment(), except_flag, Operand(zero_reg));
 
-  // Load the result.
-  __ mfc1(result, single_scratch);
-
   if (instr->hydrogen()->CheckFlag(HValue::kBailoutOnMinusZero)) {
     // Test for -0.
     Label done;
@@ -3218,8 +3288,9 @@ void LCodeGen::DoMathFloor(LUnaryMathOperation* instr) {
 
 
 void LCodeGen::DoMathRound(LUnaryMathOperation* instr) {
-  DoubleRegister input = ToDoubleRegister(instr->InputAt(0));
+  DoubleRegister input = ToDoubleRegister(instr->value());
   Register result = ToRegister(instr->result());
+  DoubleRegister double_scratch1 = ToDoubleRegister(instr->temp());
   Register scratch = scratch0();
   Label done, check_sign_on_zero;
 
@@ -3271,17 +3342,15 @@ void LCodeGen::DoMathRound(LUnaryMathOperation* instr) {
   }
 
   Register except_flag = scratch;
-
   __ EmitFPUTruncate(kRoundToMinusInf,
-                     double_scratch0().low(),
-                     double_scratch0(),
                      result,
+                     double_scratch0(),
+                     at,
+                     double_scratch1,
                      except_flag);
 
   DeoptimizeIf(ne, instr->environment(), except_flag, Operand(zero_reg));
 
-  __ mfc1(result, double_scratch0().low());
-
   if (instr->hydrogen()->CheckFlag(HValue::kBailoutOnMinusZero)) {
     // Test for -0.
     __ Branch(&done, ne, result, Operand(zero_reg));
@@ -3295,16 +3364,16 @@ void LCodeGen::DoMathRound(LUnaryMathOperation* instr) {
 
 
 void LCodeGen::DoMathSqrt(LUnaryMathOperation* instr) {
-  DoubleRegister input = ToDoubleRegister(instr->InputAt(0));
+  DoubleRegister input = ToDoubleRegister(instr->value());
   DoubleRegister result = ToDoubleRegister(instr->result());
   __ sqrt_d(result, input);
 }
 
 
 void LCodeGen::DoMathPowHalf(LUnaryMathOperation* instr) {
-  DoubleRegister input = ToDoubleRegister(instr->InputAt(0));
+  DoubleRegister input = ToDoubleRegister(instr->value());
   DoubleRegister result = ToDoubleRegister(instr->result());
-  DoubleRegister temp = ToDoubleRegister(instr->TempAt(0));
+  DoubleRegister temp = ToDoubleRegister(instr->temp());
 
   ASSERT(!input.is(result));
 
@@ -3329,11 +3398,11 @@ void LCodeGen::DoPower(LPower* instr) {
   Representation exponent_type = instr->hydrogen()->right()->representation();
   // Having marked this as a call, we can use any registers.
   // Just make sure that the input/output registers are the expected ones.
-  ASSERT(!instr->InputAt(1)->IsDoubleRegister() ||
-         ToDoubleRegister(instr->InputAt(1)).is(f4));
-  ASSERT(!instr->InputAt(1)->IsRegister() ||
-         ToRegister(instr->InputAt(1)).is(a2));
-  ASSERT(ToDoubleRegister(instr->InputAt(0)).is(f2));
+  ASSERT(!instr->right()->IsDoubleRegister() ||
+         ToDoubleRegister(instr->right()).is(f4));
+  ASSERT(!instr->right()->IsRegister() ||
+         ToRegister(instr->right()).is(a2));
+  ASSERT(ToDoubleRegister(instr->left()).is(f2));
   ASSERT(ToDoubleRegister(instr->result()).is(f0));
 
   if (exponent_type.IsTagged()) {
@@ -3370,7 +3439,7 @@ void LCodeGen::DoRandom(LRandom* instr) {
   // Having marked this instruction as a call we can use any
   // registers.
   ASSERT(ToDoubleRegister(instr->result()).is(f0));
-  ASSERT(ToRegister(instr->InputAt(0)).is(a0));
+  ASSERT(ToRegister(instr->global_object()).is(a0));
 
   static const int kSeedSize = sizeof(uint32_t);
   STATIC_ASSERT(kPointerSize == kSeedSize);
@@ -3431,6 +3500,20 @@ void LCodeGen::DoDeferredRandom(LRandom* instr) {
 }
 
 
+void LCodeGen::DoMathExp(LMathExp* instr) {
+  DoubleRegister input = ToDoubleRegister(instr->value());
+  DoubleRegister result = ToDoubleRegister(instr->result());
+  DoubleRegister double_scratch1 = ToDoubleRegister(instr->double_temp());
+  DoubleRegister double_scratch2 = double_scratch0();
+  Register temp1 = ToRegister(instr->temp1());
+  Register temp2 = ToRegister(instr->temp2());
+
+  MathExpGenerator::EmitMathExp(
+      masm(), input, result, double_scratch1, double_scratch2,
+      temp1, temp2, scratch0());
+}
+
+
 void LCodeGen::DoMathLog(LUnaryMathOperation* instr) {
   ASSERT(ToDoubleRegister(instr->result()).is(f4));
   TranscendentalCacheStub stub(TranscendentalCache::LOG,
@@ -3580,7 +3663,7 @@ void LCodeGen::DoCallKnownGlobal(LCallKnownGlobal* instr) {
 
 
 void LCodeGen::DoCallNew(LCallNew* instr) {
-  ASSERT(ToRegister(instr->InputAt(0)).is(a1));
+  ASSERT(ToRegister(instr->constructor()).is(a1));
   ASSERT(ToRegister(instr->result()).is(v0));
 
   CallConstructStub stub(NO_CALL_FUNCTION_FLAGS);
@@ -3606,7 +3689,7 @@ void LCodeGen::DoStoreNamedField(LStoreNamedField* instr) {
     __ li(scratch, Operand(instr->transition()));
     __ sw(scratch, FieldMemOperand(object, HeapObject::kMapOffset));
     if (instr->hydrogen()->NeedsWriteBarrierForMap()) {
-      Register temp = ToRegister(instr->TempAt(0));
+      Register temp = ToRegister(instr->temp());
       // Update the write barrier for the map field.
       __ RecordWriteField(object,
                           HeapObject::kMapOffset,
@@ -3712,108 +3795,8 @@ void LCodeGen::DoBoundsCheck(LBoundsCheck* instr) {
 }
 
 
-void LCodeGen::DoStoreKeyedFastElement(LStoreKeyedFastElement* instr) {
-  Register value = ToRegister(instr->value());
-  Register elements = ToRegister(instr->object());
-  Register key = instr->key()->IsRegister() ? ToRegister(instr->key()) : no_reg;
-  Register scratch = scratch0();
-  Register store_base = scratch;
-  int offset = 0;
-
-  // Do the store.
-  if (instr->key()->IsConstantOperand()) {
-    ASSERT(!instr->hydrogen()->NeedsWriteBarrier());
-    LConstantOperand* const_operand = LConstantOperand::cast(instr->key());
-    offset = FixedArray::OffsetOfElementAt(ToInteger32(const_operand) +
-                                           instr->additional_index());
-    store_base = elements;
-  } else {
-    // Even though the HLoadKeyedFastElement instruction forces the input
-    // representation for the key to be an integer, the input gets replaced
-    // during bound check elimination with the index argument to the bounds
-    // check, which can be tagged, so that case must be handled here, too.
-    if (instr->hydrogen()->key()->representation().IsTagged()) {
-      __ sll(scratch, key, kPointerSizeLog2 - kSmiTagSize);
-      __ addu(scratch, elements, scratch);
-    } else {
-      __ sll(scratch, key, kPointerSizeLog2);
-      __ addu(scratch, elements, scratch);
-    }
-    offset = FixedArray::OffsetOfElementAt(instr->additional_index());
-  }
-  __ sw(value, FieldMemOperand(store_base, offset));
-
-  if (instr->hydrogen()->NeedsWriteBarrier()) {
-    HType type = instr->hydrogen()->value()->type();
-    SmiCheck check_needed =
-        type.IsHeapObject() ? OMIT_SMI_CHECK : INLINE_SMI_CHECK;
-    // Compute address of modified element and store it into key register.
-    __ Addu(key, store_base, Operand(offset - kHeapObjectTag));
-    __ RecordWrite(elements,
-                   key,
-                   value,
-                   kRAHasBeenSaved,
-                   kSaveFPRegs,
-                   EMIT_REMEMBERED_SET,
-                   check_needed);
-  }
-}
-
-
-void LCodeGen::DoStoreKeyedFastDoubleElement(
-    LStoreKeyedFastDoubleElement* instr) {
-  DoubleRegister value = ToDoubleRegister(instr->value());
-  Register elements = ToRegister(instr->elements());
-  Register key = no_reg;
-  Register scratch = scratch0();
-  bool key_is_constant = instr->key()->IsConstantOperand();
-  int constant_key = 0;
-  Label not_nan;
-
-  // Calculate the effective address of the slot in the array to store the
-  // double value.
-  if (key_is_constant) {
-    constant_key = ToInteger32(LConstantOperand::cast(instr->key()));
-    if (constant_key & 0xF0000000) {
-      Abort("array index constant value too big.");
-    }
-  } else {
-    key = ToRegister(instr->key());
-  }
-  int element_size_shift = ElementsKindToShiftSize(FAST_DOUBLE_ELEMENTS);
-  int shift_size = (instr->hydrogen()->key()->representation().IsTagged())
-      ? (element_size_shift - kSmiTagSize) : element_size_shift;
-  if (key_is_constant) {
-    __ Addu(scratch, elements, Operand((constant_key << element_size_shift) +
-            FixedDoubleArray::kHeaderSize - kHeapObjectTag));
-  } else {
-    __ sll(scratch, key, shift_size);
-    __ Addu(scratch, elements, Operand(scratch));
-    __ Addu(scratch, scratch,
-            Operand(FixedDoubleArray::kHeaderSize - kHeapObjectTag));
-  }
-
-  if (instr->NeedsCanonicalization()) {
-    Label is_nan;
-    // Check for NaN. All NaNs must be canonicalized.
-    __ BranchF(NULL, &is_nan, eq, value, value);
-    __ Branch(&not_nan);
-
-    // Only load canonical NaN if the comparison above set the overflow.
-    __ bind(&is_nan);
-    __ Move(value, FixedDoubleArray::canonical_not_the_hole_nan_as_double());
-  }
-
-  __ bind(&not_nan);
-  __ sdc1(value, MemOperand(scratch, instr->additional_index() <<
-      element_size_shift));
-}
-
-
-void LCodeGen::DoStoreKeyedSpecializedArrayElement(
-    LStoreKeyedSpecializedArrayElement* instr) {
-
-  Register external_pointer = ToRegister(instr->external_pointer());
+void LCodeGen::DoStoreKeyedExternalArray(LStoreKeyed* instr) {
+  Register external_pointer = ToRegister(instr->elements());
   Register key = no_reg;
   ElementsKind elements_kind = instr->elements_kind();
   bool key_is_constant = instr->key()->IsConstantOperand();
@@ -3884,6 +3867,117 @@ void LCodeGen::DoStoreKeyedSpecializedArrayElement(
   }
 }
 
+
+void LCodeGen::DoStoreKeyedFixedDoubleArray(LStoreKeyed* instr) {
+  DoubleRegister value = ToDoubleRegister(instr->value());
+  Register elements = ToRegister(instr->elements());
+  Register key = no_reg;
+  Register scratch = scratch0();
+  bool key_is_constant = instr->key()->IsConstantOperand();
+  int constant_key = 0;
+  Label not_nan;
+
+  // Calculate the effective address of the slot in the array to store the
+  // double value.
+  if (key_is_constant) {
+    constant_key = ToInteger32(LConstantOperand::cast(instr->key()));
+    if (constant_key & 0xF0000000) {
+      Abort("array index constant value too big.");
+    }
+  } else {
+    key = ToRegister(instr->key());
+  }
+  int element_size_shift = ElementsKindToShiftSize(FAST_DOUBLE_ELEMENTS);
+  int shift_size = (instr->hydrogen()->key()->representation().IsTagged())
+      ? (element_size_shift - kSmiTagSize) : element_size_shift;
+  if (key_is_constant) {
+    __ Addu(scratch, elements, Operand((constant_key << element_size_shift) +
+            FixedDoubleArray::kHeaderSize - kHeapObjectTag));
+  } else {
+    __ sll(scratch, key, shift_size);
+    __ Addu(scratch, elements, Operand(scratch));
+    __ Addu(scratch, scratch,
+            Operand(FixedDoubleArray::kHeaderSize - kHeapObjectTag));
+  }
+
+  if (instr->NeedsCanonicalization()) {
+    Label is_nan;
+    // Check for NaN. All NaNs must be canonicalized.
+    __ BranchF(NULL, &is_nan, eq, value, value);
+    __ Branch(&not_nan);
+
+    // Only load canonical NaN if the comparison above set the overflow.
+    __ bind(&is_nan);
+    __ Move(value, FixedDoubleArray::canonical_not_the_hole_nan_as_double());
+  }
+
+  __ bind(&not_nan);
+  __ sdc1(value, MemOperand(scratch, instr->additional_index() <<
+      element_size_shift));
+}
+
+
+void LCodeGen::DoStoreKeyedFixedArray(LStoreKeyed* instr) {
+  Register value = ToRegister(instr->value());
+  Register elements = ToRegister(instr->elements());
+  Register key = instr->key()->IsRegister() ? ToRegister(instr->key())
+      : no_reg;
+  Register scratch = scratch0();
+  Register store_base = scratch;
+  int offset = 0;
+
+  // Do the store.
+  if (instr->key()->IsConstantOperand()) {
+    ASSERT(!instr->hydrogen()->NeedsWriteBarrier());
+    LConstantOperand* const_operand = LConstantOperand::cast(instr->key());
+    offset = FixedArray::OffsetOfElementAt(ToInteger32(const_operand) +
+                                           instr->additional_index());
+    store_base = elements;
+  } else {
+    // Even though the HLoadKeyed instruction forces the input
+    // representation for the key to be an integer, the input gets replaced
+    // during bound check elimination with the index argument to the bounds
+    // check, which can be tagged, so that case must be handled here, too.
+    if (instr->hydrogen()->key()->representation().IsTagged()) {
+      __ sll(scratch, key, kPointerSizeLog2 - kSmiTagSize);
+      __ addu(scratch, elements, scratch);
+    } else {
+      __ sll(scratch, key, kPointerSizeLog2);
+      __ addu(scratch, elements, scratch);
+    }
+    offset = FixedArray::OffsetOfElementAt(instr->additional_index());
+  }
+  __ sw(value, FieldMemOperand(store_base, offset));
+
+  if (instr->hydrogen()->NeedsWriteBarrier()) {
+    HType type = instr->hydrogen()->value()->type();
+    SmiCheck check_needed =
+       type.IsHeapObject() ? OMIT_SMI_CHECK : INLINE_SMI_CHECK;
+    // Compute address of modified element and store it into key register.
+    __ Addu(key, store_base, Operand(offset - kHeapObjectTag));
+    __ RecordWrite(elements,
+                   key,
+                   value,
+                   kRAHasBeenSaved,
+                   kSaveFPRegs,
+                   EMIT_REMEMBERED_SET,
+                   check_needed);
+  }
+}
+
+
+void LCodeGen::DoStoreKeyed(LStoreKeyed* instr) {
+  // By cases: external, fast double
+  if (instr->is_external()) {
+    DoStoreKeyedExternalArray(instr);
+  } else if (instr->hydrogen()->value()->representation().IsDouble()) {
+    DoStoreKeyedFixedDoubleArray(instr);
+  } else {
+    DoStoreKeyedFixedArray(instr);
+  }
+}
+
+
 void LCodeGen::DoStoreKeyedGeneric(LStoreKeyedGeneric* instr) {
   ASSERT(ToRegister(instr->object()).is(a2));
   ASSERT(ToRegister(instr->key()).is(a1));
@@ -3898,7 +3992,7 @@ void LCodeGen::DoStoreKeyedGeneric(LStoreKeyedGeneric* instr) {
 
 void LCodeGen::DoTransitionElementsKind(LTransitionElementsKind* instr) {
   Register object_reg = ToRegister(instr->object());
-  Register new_map_reg = ToRegister(instr->new_map_reg());
+  Register new_map_reg = ToRegister(instr->new_map_temp());
   Register scratch = scratch0();
 
   Handle<Map> from_map = instr->original_map();
@@ -3920,7 +4014,7 @@ void LCodeGen::DoTransitionElementsKind(LTransitionElementsKind* instr) {
                         scratch, kRAHasBeenSaved, kDontSaveFPRegs);
   } else if (IsFastSmiElementsKind(from_kind) &&
              IsFastDoubleElementsKind(to_kind)) {
-    Register fixed_object_reg = ToRegister(instr->temp_reg());
+    Register fixed_object_reg = ToRegister(instr->temp());
     ASSERT(fixed_object_reg.is(a2));
     ASSERT(new_map_reg.is(a3));
     __ mov(fixed_object_reg, object_reg);
@@ -3928,7 +4022,7 @@ void LCodeGen::DoTransitionElementsKind(LTransitionElementsKind* instr) {
              RelocInfo::CODE_TARGET, instr);
   } else if (IsFastDoubleElementsKind(from_kind) &&
              IsFastObjectElementsKind(to_kind)) {
-    Register fixed_object_reg = ToRegister(instr->temp_reg());
+    Register fixed_object_reg = ToRegister(instr->temp());
     ASSERT(fixed_object_reg.is(a2));
     ASSERT(new_map_reg.is(a3));
     __ mov(fixed_object_reg, object_reg);
@@ -3995,9 +4089,7 @@ void LCodeGen::DoDeferredStringCharCodeAt(LStringCharCodeAt* instr) {
     __ push(index);
   }
   CallRuntimeFromDeferred(Runtime::kStringCharCodeAt, 2, instr);
-  if (FLAG_debug_code) {
-    __ AbortIfNotSmi(v0);
-  }
+  __ AssertSmi(v0);
   __ SmiUntag(v0);
   __ StoreToSafepointRegisterSlot(v0, result);
 }
@@ -4053,14 +4145,14 @@ void LCodeGen::DoDeferredStringCharFromCode(LStringCharFromCode* instr) {
 
 
 void LCodeGen::DoStringLength(LStringLength* instr) {
-  Register string = ToRegister(instr->InputAt(0));
+  Register string = ToRegister(instr->string());
   Register result = ToRegister(instr->result());
   __ lw(result, FieldMemOperand(string, String::kLengthOffset));
 }
 
 
 void LCodeGen::DoInteger32ToDouble(LInteger32ToDouble* instr) {
-  LOperand* input = instr->InputAt(0);
+  LOperand* input = instr->value();
   ASSERT(input->IsRegister() || input->IsStackSlot());
   LOperand* output = instr->result();
   ASSERT(output->IsDoubleRegister());
@@ -4077,7 +4169,7 @@ void LCodeGen::DoInteger32ToDouble(LInteger32ToDouble* instr) {
 
 
 void LCodeGen::DoUint32ToDouble(LUint32ToDouble* instr) {
-  LOperand* input = instr->InputAt(0);
+  LOperand* input = instr->value();
   LOperand* output = instr->result();
 
   FPURegister dbl_scratch = double_scratch0();
@@ -4093,7 +4185,7 @@ void LCodeGen::DoNumberTagI(LNumberTagI* instr) {
         : LDeferredCode(codegen), instr_(instr) { }
     virtual void Generate() {
       codegen()->DoDeferredNumberTagI(instr_,
-                                      instr_->InputAt(0),
+                                      instr_->value(),
                                       SIGNED_INT32);
     }
     virtual LInstruction* instr() { return instr_; }
@@ -4101,7 +4193,7 @@ void LCodeGen::DoNumberTagI(LNumberTagI* instr) {
     LNumberTagI* instr_;
   };
 
-  Register src = ToRegister(instr->InputAt(0));
+  Register src = ToRegister(instr->value());
   Register dst = ToRegister(instr->result());
   Register overflow = scratch0();
 
@@ -4119,7 +4211,7 @@ void LCodeGen::DoNumberTagU(LNumberTagU* instr) {
         : LDeferredCode(codegen), instr_(instr) { }
     virtual void Generate() {
       codegen()->DoDeferredNumberTagI(instr_,
-                                      instr_->InputAt(0),
+                                      instr_->value(),
                                       UNSIGNED_INT32);
     }
     virtual LInstruction* instr() { return instr_; }
@@ -4127,7 +4219,7 @@ void LCodeGen::DoNumberTagU(LNumberTagU* instr) {
     LNumberTagU* instr_;
   };
 
-  LOperand* input = instr->InputAt(0);
+  LOperand* input = instr->value();
   ASSERT(input->IsRegister() && input->Equals(instr->result()));
   Register reg = ToRegister(input);
 
@@ -4167,7 +4259,7 @@ void LCodeGen::DoDeferredNumberTagI(LInstruction* instr,
 
   if (FLAG_inline_new) {
     __ LoadRoot(t2, Heap::kHeapNumberMapRootIndex);
-    __ AllocateHeapNumber(t1, a3, t0, t2, &slow);
+    __ AllocateHeapNumber(t1, a3, t0, t2, &slow, DONT_TAG_RESULT);
     __ Move(dst, t1);
     __ Branch(&done);
   }
@@ -4181,11 +4273,13 @@ void LCodeGen::DoDeferredNumberTagI(LInstruction* instr,
   __ StoreToSafepointRegisterSlot(zero_reg, dst);
   CallRuntimeFromDeferred(Runtime::kAllocateHeapNumber, 0, instr);
   __ Move(dst, v0);
+  __ Subu(dst, dst, kHeapObjectTag);
 
   // Done. Put the value in dbl_scratch into the value of the allocated heap
   // number.
   __ bind(&done);
-  __ sdc1(dbl_scratch, FieldMemOperand(dst, HeapNumber::kValueOffset));
+  __ sdc1(dbl_scratch, MemOperand(dst, HeapNumber::kValueOffset));
+  __ Addu(dst, dst, kHeapObjectTag);
   __ StoreToSafepointRegisterSlot(dst, dst);
 }
 
@@ -4201,21 +4295,25 @@ void LCodeGen::DoNumberTagD(LNumberTagD* instr) {
     LNumberTagD* instr_;
   };
 
-  DoubleRegister input_reg = ToDoubleRegister(instr->InputAt(0));
+  DoubleRegister input_reg = ToDoubleRegister(instr->value());
   Register scratch = scratch0();
   Register reg = ToRegister(instr->result());
-  Register temp1 = ToRegister(instr->TempAt(0));
-  Register temp2 = ToRegister(instr->TempAt(1));
+  Register temp1 = ToRegister(instr->temp());
+  Register temp2 = ToRegister(instr->temp2());
 
   DeferredNumberTagD* deferred = new(zone()) DeferredNumberTagD(this, instr);
   if (FLAG_inline_new) {
     __ LoadRoot(scratch, Heap::kHeapNumberMapRootIndex);
-    __ AllocateHeapNumber(reg, temp1, temp2, scratch, deferred->entry());
+    // We want the untagged address first for performance
+    __ AllocateHeapNumber(reg, temp1, temp2, scratch, deferred->entry(),
+                          DONT_TAG_RESULT);
   } else {
     __ Branch(deferred->entry());
   }
   __ bind(deferred->exit());
-  __ sdc1(input_reg, FieldMemOperand(reg, HeapNumber::kValueOffset));
+  __ sdc1(input_reg, MemOperand(reg, HeapNumber::kValueOffset));
+  // Now that we have finished with the object's real address tag it
+  __ Addu(reg, reg, kHeapObjectTag);
 }
 
 
@@ -4228,19 +4326,20 @@ void LCodeGen::DoDeferredNumberTagD(LNumberTagD* instr) {
 
   PushSafepointRegistersScope scope(this, Safepoint::kWithRegisters);
   CallRuntimeFromDeferred(Runtime::kAllocateHeapNumber, 0, instr);
+  __ Subu(v0, v0, kHeapObjectTag);
   __ StoreToSafepointRegisterSlot(v0, reg);
 }
 
 
 void LCodeGen::DoSmiTag(LSmiTag* instr) {
   ASSERT(!instr->hydrogen_value()->CheckFlag(HValue::kCanOverflow));
-  __ SmiTag(ToRegister(instr->result()), ToRegister(instr->InputAt(0)));
+  __ SmiTag(ToRegister(instr->result()), ToRegister(instr->value()));
 }
 
 
 void LCodeGen::DoSmiUntag(LSmiUntag* instr) {
   Register scratch = scratch0();
-  Register input = ToRegister(instr->InputAt(0));
+  Register input = ToRegister(instr->value());
   Register result = ToRegister(instr->result());
   if (instr->needs_check()) {
     STATIC_ASSERT(kHeapObjectTag == 1);
@@ -4305,11 +4404,11 @@ void LCodeGen::EmitNumberUntagD(Register input_reg,
 
 
 void LCodeGen::DoDeferredTaggedToI(LTaggedToI* instr) {
-  Register input_reg = ToRegister(instr->InputAt(0));
+  Register input_reg = ToRegister(instr->value());
   Register scratch1 = scratch0();
-  Register scratch2 = ToRegister(instr->TempAt(0));
+  Register scratch2 = ToRegister(instr->temp());
   DoubleRegister double_scratch = double_scratch0();
-  FPURegister single_scratch = double_scratch.low();
+  DoubleRegister double_scratch2 = ToDoubleRegister(instr->temp3());
 
   ASSERT(!scratch1.is(input_reg) && !scratch1.is(scratch2));
   ASSERT(!scratch2.is(input_reg) && !scratch2.is(scratch1));
@@ -4324,8 +4423,8 @@ void LCodeGen::DoDeferredTaggedToI(LTaggedToI* instr) {
   // of the if.
 
   if (instr->truncating()) {
-    Register scratch3 = ToRegister(instr->TempAt(1));
-    DoubleRegister double_scratch2 = ToDoubleRegister(instr->TempAt(2));
+    Register scratch3 = ToRegister(instr->temp2());
+    FPURegister single_scratch = double_scratch.low();
     ASSERT(!scratch3.is(input_reg) &&
            !scratch3.is(scratch1) &&
            !scratch3.is(scratch2));
@@ -4360,18 +4459,16 @@ void LCodeGen::DoDeferredTaggedToI(LTaggedToI* instr) {
 
     Register except_flag = scratch2;
     __ EmitFPUTruncate(kRoundToZero,
-                       single_scratch,
+                       input_reg,
                        double_scratch,
                        scratch1,
+                       double_scratch2,
                        except_flag,
                        kCheckForInexactConversion);
 
     // Deopt if the operation did not succeed.
     DeoptimizeIf(ne, instr->environment(), except_flag, Operand(zero_reg));
 
-    // Load the result.
-    __ mfc1(input_reg, single_scratch);
-
     if (instr->hydrogen()->CheckFlag(HValue::kBailoutOnMinusZero)) {
       __ Branch(&done, ne, input_reg, Operand(zero_reg));
 
@@ -4395,7 +4492,7 @@ void LCodeGen::DoTaggedToI(LTaggedToI* instr) {
     LTaggedToI* instr_;
   };
 
-  LOperand* input = instr->InputAt(0);
+  LOperand* input = instr->value();
   ASSERT(input->IsRegister());
   ASSERT(input->Equals(instr->result()));
 
@@ -4413,7 +4510,7 @@ void LCodeGen::DoTaggedToI(LTaggedToI* instr) {
 
 
 void LCodeGen::DoNumberUntagD(LNumberUntagD* instr) {
-  LOperand* input = instr->InputAt(0);
+  LOperand* input = instr->value();
   ASSERT(input->IsRegister());
   LOperand* result = instr->result();
   ASSERT(result->IsDoubleRegister());
@@ -4431,12 +4528,12 @@ void LCodeGen::DoNumberUntagD(LNumberUntagD* instr) {
 void LCodeGen::DoDoubleToI(LDoubleToI* instr) {
   Register result_reg = ToRegister(instr->result());
   Register scratch1 = scratch0();
-  Register scratch2 = ToRegister(instr->TempAt(0));
-  DoubleRegister double_input = ToDoubleRegister(instr->InputAt(0));
-  FPURegister single_scratch = double_scratch0().low();
+  Register scratch2 = ToRegister(instr->temp());
+  DoubleRegister double_input = ToDoubleRegister(instr->value());
 
   if (instr->truncating()) {
-    Register scratch3 = ToRegister(instr->TempAt(1));
+    Register scratch3 = ToRegister(instr->temp2());
+    FPURegister single_scratch = double_scratch0().low();
     __ EmitECMATruncate(result_reg,
                         double_input,
                         single_scratch,
@@ -4447,37 +4544,35 @@ void LCodeGen::DoDoubleToI(LDoubleToI* instr) {
     Register except_flag = scratch2;
 
     __ EmitFPUTruncate(kRoundToMinusInf,
-                       single_scratch,
+                       result_reg,
                        double_input,
                        scratch1,
+                       double_scratch0(),
                        except_flag,
                        kCheckForInexactConversion);
 
     // Deopt if the operation did not succeed (except_flag != 0).
     DeoptimizeIf(ne, instr->environment(), except_flag, Operand(zero_reg));
-
-    // Load the result.
-    __ mfc1(result_reg, single_scratch);
   }
 }
 
 
 void LCodeGen::DoCheckSmi(LCheckSmi* instr) {
-  LOperand* input = instr->InputAt(0);
+  LOperand* input = instr->value();
   __ And(at, ToRegister(input), Operand(kSmiTagMask));
   DeoptimizeIf(ne, instr->environment(), at, Operand(zero_reg));
 }
 
 
 void LCodeGen::DoCheckNonSmi(LCheckNonSmi* instr) {
-  LOperand* input = instr->InputAt(0);
+  LOperand* input = instr->value();
   __ And(at, ToRegister(input), Operand(kSmiTagMask));
   DeoptimizeIf(eq, instr->environment(), at, Operand(zero_reg));
 }
 
 
 void LCodeGen::DoCheckInstanceType(LCheckInstanceType* instr) {
-  Register input = ToRegister(instr->InputAt(0));
+  Register input = ToRegister(instr->value());
   Register scratch = scratch0();
 
   __ GetObjectType(input, scratch, scratch);
@@ -4547,7 +4642,7 @@ void LCodeGen::DoCheckMapCommon(Register reg,
 
 void LCodeGen::DoCheckMaps(LCheckMaps* instr) {
   Register scratch = scratch0();
-  LOperand* input = instr->InputAt(0);
+  LOperand* input = instr->value();
   ASSERT(input->IsRegister());
   Register reg = ToRegister(input);
   Label success;
@@ -4566,7 +4661,7 @@ void LCodeGen::DoCheckMaps(LCheckMaps* instr) {
 void LCodeGen::DoClampDToUint8(LClampDToUint8* instr) {
   DoubleRegister value_reg = ToDoubleRegister(instr->unclamped());
   Register result_reg = ToRegister(instr->result());
-  DoubleRegister temp_reg = ToDoubleRegister(instr->TempAt(0));
+  DoubleRegister temp_reg = ToDoubleRegister(instr->temp());
   __ ClampDoubleToUint8(result_reg, value_reg, temp_reg);
 }
 
@@ -4582,7 +4677,7 @@ void LCodeGen::DoClampTToUint8(LClampTToUint8* instr) {
   Register scratch = scratch0();
   Register input_reg = ToRegister(instr->unclamped());
   Register result_reg = ToRegister(instr->result());
-  DoubleRegister temp_reg = ToDoubleRegister(instr->TempAt(0));
+  DoubleRegister temp_reg = ToDoubleRegister(instr->temp());
   Label is_smi, done, heap_number;
 
   // Both smi and heap number cases are handled.
@@ -4614,8 +4709,9 @@ void LCodeGen::DoClampTToUint8(LClampTToUint8* instr) {
 
 
 void LCodeGen::DoCheckPrototypeMaps(LCheckPrototypeMaps* instr) {
-  Register temp1 = ToRegister(instr->TempAt(0));
-  Register temp2 = ToRegister(instr->TempAt(1));
+  ASSERT(instr->temp()->Equals(instr->result()));
+  Register temp1 = ToRegister(instr->temp());
+  Register temp2 = ToRegister(instr->temp2());
 
   Handle<JSObject> holder = instr->holder();
   Handle<JSObject> current_prototype = instr->prototype();
@@ -4656,8 +4752,8 @@ void LCodeGen::DoAllocateObject(LAllocateObject* instr) {
       new(zone()) DeferredAllocateObject(this, instr);
 
   Register result = ToRegister(instr->result());
-  Register scratch = ToRegister(instr->TempAt(0));
-  Register scratch2 = ToRegister(instr->TempAt(1));
+  Register scratch = ToRegister(instr->temp());
+  Register scratch2 = ToRegister(instr->temp2());
   Handle<JSFunction> constructor = instr->hydrogen()->constructor();
   Handle<Map> initial_map(constructor->initial_map());
   int instance_size = initial_map->instance_size();
@@ -4953,7 +5049,7 @@ void LCodeGen::DoObjectLiteral(LObjectLiteral* instr) {
 
 
 void LCodeGen::DoToFastProperties(LToFastProperties* instr) {
-  ASSERT(ToRegister(instr->InputAt(0)).is(a0));
+  ASSERT(ToRegister(instr->value()).is(a0));
   ASSERT(ToRegister(instr->result()).is(v0));
   __ push(a0);
   CallRuntime(Runtime::kToFastProperties, 1, instr);
@@ -5035,14 +5131,14 @@ void LCodeGen::DoFunctionLiteral(LFunctionLiteral* instr) {
 
 void LCodeGen::DoTypeof(LTypeof* instr) {
   ASSERT(ToRegister(instr->result()).is(v0));
-  Register input = ToRegister(instr->InputAt(0));
+  Register input = ToRegister(instr->value());
   __ push(input);
   CallRuntime(Runtime::kTypeof, 1, instr);
 }
 
 
 void LCodeGen::DoTypeofIsAndBranch(LTypeofIsAndBranch* instr) {
-  Register input = ToRegister(instr->InputAt(0));
+  Register input = ToRegister(instr->value());
   int true_block = chunk_->LookupDestination(instr->true_block_id());
   int false_block = chunk_->LookupDestination(instr->false_block_id());
   Label* true_label = chunk_->GetAssemblyLabel(true_block);
@@ -5169,7 +5265,7 @@ Condition LCodeGen::EmitTypeofIs(Label* true_label,
 
 
 void LCodeGen::DoIsConstructCallAndBranch(LIsConstructCallAndBranch* instr) {
-  Register temp1 = ToRegister(instr->TempAt(0));
+  Register temp1 = ToRegister(instr->temp());
   int true_block = chunk_->LookupDestination(instr->true_block_id());
   int false_block = chunk_->LookupDestination(instr->false_block_id());
 
@@ -5368,7 +5464,6 @@ void LCodeGen::DoForInPrepareMap(LForInPrepareMap* instr) {
 void LCodeGen::DoForInCacheArray(LForInCacheArray* instr) {
   Register map = ToRegister(instr->map());
   Register result = ToRegister(instr->result());
-  Register scratch = ToRegister(instr->scratch());
   Label load_cache, done;
   __ EnumLength(result, map);
   __ Branch(&load_cache, ne, result, Operand(Smi::FromInt(0)));
@@ -5376,7 +5471,7 @@ void LCodeGen::DoForInCacheArray(LForInCacheArray* instr) {
   __ jmp(&done);
 
   __ bind(&load_cache);
-  __ LoadInstanceDescriptors(map, result, scratch);
+  __ LoadInstanceDescriptors(map, result);
   __ lw(result,
         FieldMemOperand(result, DescriptorArray::kEnumCacheOffset));
   __ lw(result,
diff --git a/deps/v8/src/mips/lithium-codegen-mips.h b/deps/v8/src/mips/lithium-codegen-mips.h
index aeafbcd74b..7363eb8efe 100644
--- a/deps/v8/src/mips/lithium-codegen-mips.h
+++ b/deps/v8/src/mips/lithium-codegen-mips.h
@@ -143,7 +143,10 @@ class LCodeGen BASE_EMBEDDED {
                                  int additional_offset);
 
   // Emit frame translation commands for an environment.
-  void WriteTranslation(LEnvironment* environment, Translation* translation);
+  void WriteTranslation(LEnvironment* environment,
+                        Translation* translation,
+                        int* arguments_index,
+                        int* arguments_count);
 
   // Declare methods that deal with the individual node types.
 #define DECLARE_DO(type) void Do##type(L##type* node);
@@ -258,7 +261,9 @@ class LCodeGen BASE_EMBEDDED {
   void AddToTranslation(Translation* translation,
                         LOperand* op,
                         bool is_tagged,
-                        bool is_uint32);
+                        bool is_uint32,
+                        int arguments_index,
+                        int arguments_count);
   void PopulateDeoptimizationData(Handle<Code> code);
   int DefineDeoptimizationLiteral(Handle<Object> literal);
 
@@ -371,6 +376,12 @@ class LCodeGen BASE_EMBEDDED {
   };
 
   void EnsureSpaceForLazyDeopt();
+  void DoLoadKeyedExternalArray(LLoadKeyed* instr);
+  void DoLoadKeyedFixedDoubleArray(LLoadKeyed* instr);
+  void DoLoadKeyedFixedArray(LLoadKeyed* instr);
+  void DoStoreKeyedExternalArray(LStoreKeyed* instr);
+  void DoStoreKeyedFixedDoubleArray(LStoreKeyed* instr);
+  void DoStoreKeyedFixedArray(LStoreKeyed* instr);
 
   Zone* zone_;
   LPlatformChunk* const chunk_;
diff --git a/deps/v8/src/mips/lithium-mips.cc b/deps/v8/src/mips/lithium-mips.cc
index 958bbc491a..56dd33d246 100644
--- a/deps/v8/src/mips/lithium-mips.cc
+++ b/deps/v8/src/mips/lithium-mips.cc
@@ -177,6 +177,7 @@ const char* LArithmeticT::Mnemonic() const {
     case Token::BIT_AND: return "bit-and-t";
     case Token::BIT_OR: return "bit-or-t";
     case Token::BIT_XOR: return "bit-xor-t";
+    case Token::ROR: return "ror-t";
     case Token::SHL: return "sll-t";
     case Token::SAR: return "sra-t";
     case Token::SHR: return "srl-t";
@@ -194,22 +195,22 @@ void LGoto::PrintDataTo(StringStream* stream) {
 
 void LBranch::PrintDataTo(StringStream* stream) {
   stream->Add("B%d | B%d on ", true_block_id(), false_block_id());
-  InputAt(0)->PrintTo(stream);
+  value()->PrintTo(stream);
 }
 
 
 void LCmpIDAndBranch::PrintDataTo(StringStream* stream) {
   stream->Add("if ");
-  InputAt(0)->PrintTo(stream);
+  left()->PrintTo(stream);
   stream->Add(" %s ", Token::String(op()));
-  InputAt(1)->PrintTo(stream);
+  right()->PrintTo(stream);
   stream->Add(" then B%d else B%d", true_block_id(), false_block_id());
 }
 
 
 void LIsNilAndBranch::PrintDataTo(StringStream* stream) {
   stream->Add("if ");
-  InputAt(0)->PrintTo(stream);
+  value()->PrintTo(stream);
   stream->Add(kind() == kStrictEquality ? " === " : " == ");
   stream->Add(nil() == kNullValue ? "null" : "undefined");
   stream->Add(" then B%d else B%d", true_block_id(), false_block_id());
@@ -218,57 +219,57 @@ void LIsNilAndBranch::PrintDataTo(StringStream* stream) {
 
 void LIsObjectAndBranch::PrintDataTo(StringStream* stream) {
   stream->Add("if is_object(");
-  InputAt(0)->PrintTo(stream);
+  value()->PrintTo(stream);
   stream->Add(") then B%d else B%d", true_block_id(), false_block_id());
 }
 
 
 void LIsStringAndBranch::PrintDataTo(StringStream* stream) {
   stream->Add("if is_string(");
-  InputAt(0)->PrintTo(stream);
+  value()->PrintTo(stream);
   stream->Add(") then B%d else B%d", true_block_id(), false_block_id());
 }
 
 
 void LIsSmiAndBranch::PrintDataTo(StringStream* stream) {
   stream->Add("if is_smi(");
-  InputAt(0)->PrintTo(stream);
+  value()->PrintTo(stream);
   stream->Add(") then B%d else B%d", true_block_id(), false_block_id());
 }
 
 
 void LIsUndetectableAndBranch::PrintDataTo(StringStream* stream) {
   stream->Add("if is_undetectable(");
-  InputAt(0)->PrintTo(stream);
+  value()->PrintTo(stream);
   stream->Add(") then B%d else B%d", true_block_id(), false_block_id());
 }
 
 
 void LStringCompareAndBranch::PrintDataTo(StringStream* stream) {
   stream->Add("if string_compare(");
-  InputAt(0)->PrintTo(stream);
-  InputAt(1)->PrintTo(stream);
+  left()->PrintTo(stream);
+  right()->PrintTo(stream);
   stream->Add(") then B%d else B%d", true_block_id(), false_block_id());
 }
 
 
 void LHasInstanceTypeAndBranch::PrintDataTo(StringStream* stream) {
   stream->Add("if has_instance_type(");
-  InputAt(0)->PrintTo(stream);
+  value()->PrintTo(stream);
   stream->Add(") then B%d else B%d", true_block_id(), false_block_id());
 }
 
 
 void LHasCachedArrayIndexAndBranch::PrintDataTo(StringStream* stream) {
   stream->Add("if has_cached_array_index(");
-  InputAt(0)->PrintTo(stream);
+  value()->PrintTo(stream);
   stream->Add(") then B%d else B%d", true_block_id(), false_block_id());
 }
 
 
 void LClassOfTestAndBranch::PrintDataTo(StringStream* stream) {
   stream->Add("if class_of_test(");
-  InputAt(0)->PrintTo(stream);
+  value()->PrintTo(stream);
   stream->Add(", \"%o\") then B%d else B%d",
               *hydrogen()->class_name(),
               true_block_id(),
@@ -278,7 +279,7 @@ void LClassOfTestAndBranch::PrintDataTo(StringStream* stream) {
 
 void LTypeofIsAndBranch::PrintDataTo(StringStream* stream) {
   stream->Add("if typeof ");
-  InputAt(0)->PrintTo(stream);
+  value()->PrintTo(stream);
   stream->Add(" == \"%s\" then B%d else B%d",
               *hydrogen()->type_literal()->ToCString(),
               true_block_id(), false_block_id());
@@ -292,26 +293,31 @@ void LCallConstantFunction::PrintDataTo(StringStream* stream) {
 
 void LUnaryMathOperation::PrintDataTo(StringStream* stream) {
   stream->Add("/%s ", hydrogen()->OpName());
-  InputAt(0)->PrintTo(stream);
+  value()->PrintTo(stream);
+}
+
+
+void LMathExp::PrintDataTo(StringStream* stream) {
+  value()->PrintTo(stream);
 }
 
 
 void LLoadContextSlot::PrintDataTo(StringStream* stream) {
-  InputAt(0)->PrintTo(stream);
+  context()->PrintTo(stream);
   stream->Add("[%d]", slot_index());
 }
 
 
 void LStoreContextSlot::PrintDataTo(StringStream* stream) {
-  InputAt(0)->PrintTo(stream);
+  context()->PrintTo(stream);
   stream->Add("[%d] <- ", slot_index());
-  InputAt(1)->PrintTo(stream);
+  value()->PrintTo(stream);
 }
 
 
 void LInvokeFunction::PrintDataTo(StringStream* stream) {
   stream->Add("= ");
-  InputAt(0)->PrintTo(stream);
+  function()->PrintTo(stream);
   stream->Add(" #%d / ", arity());
 }
 
@@ -340,17 +346,15 @@ void LCallKnownGlobal::PrintDataTo(StringStream* stream) {
 
 void LCallNew::PrintDataTo(StringStream* stream) {
   stream->Add("= ");
-  InputAt(0)->PrintTo(stream);
+  constructor()->PrintTo(stream);
   stream->Add(" #%d / ", arity());
 }
 
 
 void LAccessArgumentsAt::PrintDataTo(StringStream* stream) {
   arguments()->PrintTo(stream);
-
   stream->Add(" length ");
   length()->PrintTo(stream);
-
   stream->Add(" index ");
   index()->PrintTo(stream);
 }
@@ -374,20 +378,27 @@ void LStoreNamedGeneric::PrintDataTo(StringStream* stream) {
 }
 
 
-void LStoreKeyedFastElement::PrintDataTo(StringStream* stream) {
-  object()->PrintTo(stream);
+void LLoadKeyed::PrintDataTo(StringStream* stream) {
+  elements()->PrintTo(stream);
   stream->Add("[");
   key()->PrintTo(stream);
-  stream->Add("] <- ");
-  value()->PrintTo(stream);
+  if (hydrogen()->IsDehoisted()) {
+    stream->Add(" + %d]", additional_index());
+  } else {
+    stream->Add("]");
+  }
 }
 
 
-void LStoreKeyedFastDoubleElement::PrintDataTo(StringStream* stream) {
+void LStoreKeyed::PrintDataTo(StringStream* stream) {
   elements()->PrintTo(stream);
   stream->Add("[");
   key()->PrintTo(stream);
-  stream->Add("] <- ");
+  if (hydrogen()->IsDehoisted()) {
+    stream->Add(" + %d] <-", additional_index());
+  } else {
+    stream->Add("] <- ");
+  }
   value()->PrintTo(stream);
 }
 
@@ -704,15 +715,13 @@ LInstruction* LChunkBuilder::DoShift(Token::Value op,
     right = UseRegisterAtStart(right_value);
   }
 
+  // Shift operations can only deoptimize if we do a logical shift
+  // by 0 and the result cannot be truncated to int32.
   bool does_deopt = false;
-
-  if (FLAG_opt_safe_uint32_operations) {
-    does_deopt = !instr->CheckFlag(HInstruction::kUint32);
-  } else {
-    // Shift operations can only deoptimize if we do a logical shift
-    // by 0 and the result cannot be truncated to int32.
-    bool may_deopt = (op == Token::SHR && constant_value == 0);
-    if (may_deopt) {
+  if (op == Token::SHR && constant_value == 0) {
+    if (FLAG_opt_safe_uint32_operations) {
+      does_deopt = !instr->CheckFlag(HInstruction::kUint32);
+    } else {
       for (HUseIterator it(instr->uses()); !it.Done(); it.Advance()) {
         if (!it.value()->CheckFlag(HValue::kTruncatingToInt32)) {
           does_deopt = true;
@@ -862,6 +871,7 @@ LEnvironment* LChunkBuilder::CreateEnvironment(
       argument_count_,
       value_count,
       outer,
+      hydrogen_env->entry(),
       zone());
   int argument_index = *argument_index_accumulator;
   for (int i = 0; i < value_count; ++i) {
@@ -1035,6 +1045,15 @@ LInstruction* LChunkBuilder::DoUnaryMathOperation(HUnaryMathOperation* instr) {
     LOperand* input = UseFixedDouble(instr->value(), f4);
     LUnaryMathOperation* result = new(zone()) LUnaryMathOperation(input, NULL);
     return MarkAsCall(DefineFixedDouble(result, f4), instr);
+  } else if (op == kMathExp) {
+    ASSERT(instr->representation().IsDouble());
+    ASSERT(instr->value()->representation().IsDouble());
+    LOperand* input = UseTempRegister(instr->value());
+    LOperand* temp1 = TempRegister();
+    LOperand* temp2 = TempRegister();
+    LOperand* double_temp = FixedTemp(f6);  // Chosen by fair dice roll.
+    LMathExp* result = new(zone()) LMathExp(input, double_temp, temp1, temp2);
+    return DefineAsRegister(result);
   } else if (op == kMathPowHalf) {
     // Input cannot be the same as the result.
     // See lithium-codegen-mips.cc::DoMathPowHalf.
@@ -1044,7 +1063,9 @@ LInstruction* LChunkBuilder::DoUnaryMathOperation(HUnaryMathOperation* instr) {
     return DefineFixedDouble(result, f4);
   } else {
     LOperand* input = UseRegisterAtStart(instr->value());
-    LOperand* temp = (op == kMathFloor) ? TempRegister() : NULL;
+
+    LOperand* temp = (op == kMathRound) ? FixedTemp(f6) :
+        (op == kMathFloor) ? TempRegister() : NULL;
     LUnaryMathOperation* result = new(zone()) LUnaryMathOperation(input, temp);
     switch (op) {
       case kMathAbs:
@@ -1111,6 +1132,11 @@ LInstruction* LChunkBuilder::DoCallRuntime(HCallRuntime* instr) {
 }
 
 
+LInstruction* LChunkBuilder::DoRor(HRor* instr) {
+  return DoShift(Token::ROR, instr);
+}
+
+
 LInstruction* LChunkBuilder::DoShr(HShr* instr) {
   return DoShift(Token::SHR, instr);
 }
@@ -1351,7 +1377,7 @@ LInstruction* LChunkBuilder::DoCompareGeneric(HCompareGeneric* instr) {
 
 LInstruction* LChunkBuilder::DoCompareIDAndBranch(
     HCompareIDAndBranch* instr) {
-  Representation r = instr->GetInputRepresentation();
+  Representation r = instr->representation();
   if (r.IsInteger32()) {
     ASSERT(instr->left()->representation().IsInteger32());
     ASSERT(instr->right()->representation().IsInteger32());
@@ -1556,8 +1582,7 @@ LInstruction* LChunkBuilder::DoChange(HChange* instr) {
         LOperand* temp1 = TempRegister();
         LOperand* temp2 = instr->CanTruncateToInt32() ? TempRegister()
                                                       : NULL;
-        LOperand* temp3 = instr->CanTruncateToInt32() ? FixedTemp(f22)
-                                                      : NULL;
+        LOperand* temp3 = FixedTemp(f22);
         res = DefineSameAsFirst(new(zone()) LTaggedToI(value,
                                                        temp1,
                                                        temp2,
@@ -1629,10 +1654,10 @@ LInstruction* LChunkBuilder::DoCheckInstanceType(HCheckInstanceType* instr) {
 
 
 LInstruction* LChunkBuilder::DoCheckPrototypeMaps(HCheckPrototypeMaps* instr) {
-  LOperand* temp1 = TempRegister();
+  LUnallocated* temp1 = TempRegister();
   LOperand* temp2 = TempRegister();
-  LInstruction* result = new(zone()) LCheckPrototypeMaps(temp1, temp2);
-  return AssignEnvironment(result);
+  LCheckPrototypeMaps* result = new(zone()) LCheckPrototypeMaps(temp1, temp2);
+  return AssignEnvironment(Define(result, temp1));
 }
 
 
@@ -1801,54 +1826,40 @@ LInstruction* LChunkBuilder::DoLoadExternalArrayPointer(
 }
 
 
-LInstruction* LChunkBuilder::DoLoadKeyedFastElement(
-    HLoadKeyedFastElement* instr) {
-  ASSERT(instr->representation().IsTagged());
+LInstruction* LChunkBuilder::DoLoadKeyed(HLoadKeyed* instr) {
   ASSERT(instr->key()->representation().IsInteger32() ||
          instr->key()->representation().IsTagged());
-  LOperand* obj = UseRegisterAtStart(instr->object());
-  LOperand* key = UseRegisterOrConstantAtStart(instr->key());
-  LLoadKeyedFastElement* result = new(zone()) LLoadKeyedFastElement(obj, key);
-  if (instr->RequiresHoleCheck()) AssignEnvironment(result);
-  return DefineAsRegister(result);
-}
-
-
-LInstruction* LChunkBuilder::DoLoadKeyedFastDoubleElement(
-    HLoadKeyedFastDoubleElement* instr) {
-  ASSERT(instr->representation().IsDouble());
-  ASSERT(instr->key()->representation().IsInteger32() ||
-         instr->key()->representation().IsTagged());
-  LOperand* elements = UseTempRegister(instr->elements());
+  ElementsKind elements_kind = instr->elements_kind();
   LOperand* key = UseRegisterOrConstantAtStart(instr->key());
-  LLoadKeyedFastDoubleElement* result =
-      new(zone()) LLoadKeyedFastDoubleElement(elements, key);
-  return AssignEnvironment(DefineAsRegister(result));
-}
+  LLoadKeyed* result = NULL;
 
+  if (!instr->is_external()) {
+    LOperand* obj = NULL;
+    if (instr->representation().IsDouble()) {
+      obj = UseTempRegister(instr->elements());
+    } else {
+      ASSERT(instr->representation().IsTagged());
+      obj = UseRegisterAtStart(instr->elements());
+    }
+    result = new(zone()) LLoadKeyed(obj, key);
+  } else {
+    ASSERT(
+        (instr->representation().IsInteger32() &&
+         (elements_kind != EXTERNAL_FLOAT_ELEMENTS) &&
+         (elements_kind != EXTERNAL_DOUBLE_ELEMENTS)) ||
+        (instr->representation().IsDouble() &&
+         ((elements_kind == EXTERNAL_FLOAT_ELEMENTS) ||
+          (elements_kind == EXTERNAL_DOUBLE_ELEMENTS))));
+    LOperand* external_pointer = UseRegister(instr->elements());
+    result = new(zone()) LLoadKeyed(external_pointer, key);
+  }
 
-LInstruction* LChunkBuilder::DoLoadKeyedSpecializedArrayElement(
-    HLoadKeyedSpecializedArrayElement* instr) {
-  ElementsKind elements_kind = instr->elements_kind();
-  Representation representation(instr->representation());
-  ASSERT(
-      (representation.IsInteger32() &&
-       (elements_kind != EXTERNAL_FLOAT_ELEMENTS) &&
-       (elements_kind != EXTERNAL_DOUBLE_ELEMENTS)) ||
-      (representation.IsDouble() &&
-       ((elements_kind == EXTERNAL_FLOAT_ELEMENTS) ||
-       (elements_kind == EXTERNAL_DOUBLE_ELEMENTS))));
-  ASSERT(instr->key()->representation().IsInteger32() ||
-         instr->key()->representation().IsTagged());
-  LOperand* external_pointer = UseRegister(instr->external_pointer());
-  LOperand* key = UseRegisterOrConstant(instr->key());
-  LLoadKeyedSpecializedArrayElement* result =
-      new(zone()) LLoadKeyedSpecializedArrayElement(external_pointer, key);
-  LInstruction* load_instr = DefineAsRegister(result);
+  DefineAsRegister(result);
   // An unsigned int array load might overflow and cause a deopt, make sure it
   // has an environment.
-  return (elements_kind == EXTERNAL_UNSIGNED_INT_ELEMENTS) ?
-      AssignEnvironment(load_instr) : load_instr;
+  bool can_deoptimize = instr->RequiresHoleCheck() ||
+      (elements_kind == EXTERNAL_UNSIGNED_INT_ELEMENTS);
+  return can_deoptimize ? AssignEnvironment(result) : result;
 }
 
 
@@ -1862,67 +1873,49 @@ LInstruction* LChunkBuilder::DoLoadKeyedGeneric(HLoadKeyedGeneric* instr) {
 }
 
 
-LInstruction* LChunkBuilder::DoStoreKeyedFastElement(
-    HStoreKeyedFastElement* instr) {
-  bool needs_write_barrier = instr->NeedsWriteBarrier();
-  ASSERT(instr->value()->representation().IsTagged());
-  ASSERT(instr->object()->representation().IsTagged());
-  ASSERT(instr->key()->representation().IsInteger32() ||
-         instr->key()->representation().IsTagged());
-
-  LOperand* obj = UseTempRegister(instr->object());
-  LOperand* val = needs_write_barrier
-      ? UseTempRegister(instr->value())
-      : UseRegisterAtStart(instr->value());
-  LOperand* key = needs_write_barrier
-      ? UseTempRegister(instr->key())
-      : UseRegisterOrConstantAtStart(instr->key());
-  return new(zone()) LStoreKeyedFastElement(obj, key, val);
-}
-
-
-LInstruction* LChunkBuilder::DoStoreKeyedFastDoubleElement(
-    HStoreKeyedFastDoubleElement* instr) {
-  ASSERT(instr->value()->representation().IsDouble());
-  ASSERT(instr->elements()->representation().IsTagged());
-  ASSERT(instr->key()->representation().IsInteger32() ||
-         instr->key()->representation().IsTagged());
-
-  LOperand* elements = UseRegisterAtStart(instr->elements());
-  LOperand* val = UseTempRegister(instr->value());
-  LOperand* key = UseRegisterOrConstantAtStart(instr->key());
+LInstruction* LChunkBuilder::DoStoreKeyed(HStoreKeyed* instr) {
+  ElementsKind elements_kind = instr->elements_kind();
 
-  return new(zone()) LStoreKeyedFastDoubleElement(elements, key, val);
-}
+  if (!instr->is_external()) {
+    ASSERT(instr->elements()->representation().IsTagged());
+    bool needs_write_barrier = instr->NeedsWriteBarrier();
+    LOperand* object = NULL;
+    LOperand* val = NULL;
+    LOperand* key = NULL;
+
+    if (instr->value()->representation().IsDouble()) {
+      object = UseRegisterAtStart(instr->elements());
+      key = UseRegisterOrConstantAtStart(instr->key());
+      val = UseTempRegister(instr->value());
+    } else {
+      ASSERT(instr->value()->representation().IsTagged());
+      object = UseTempRegister(instr->elements());
+      val = needs_write_barrier ? UseTempRegister(instr->value())
+          : UseRegisterAtStart(instr->value());
+      key = needs_write_barrier ? UseTempRegister(instr->key())
+          : UseRegisterOrConstantAtStart(instr->key());
+    }
 
+    return new(zone()) LStoreKeyed(object, key, val);
+  }
 
-LInstruction* LChunkBuilder::DoStoreKeyedSpecializedArrayElement(
-    HStoreKeyedSpecializedArrayElement* instr) {
-  Representation representation(instr->value()->representation());
-  ElementsKind elements_kind = instr->elements_kind();
   ASSERT(
-      (representation.IsInteger32() &&
+      (instr->value()->representation().IsInteger32() &&
        (elements_kind != EXTERNAL_FLOAT_ELEMENTS) &&
        (elements_kind != EXTERNAL_DOUBLE_ELEMENTS)) ||
-      (representation.IsDouble() &&
+      (instr->value()->representation().IsDouble() &&
        ((elements_kind == EXTERNAL_FLOAT_ELEMENTS) ||
-       (elements_kind == EXTERNAL_DOUBLE_ELEMENTS))));
-  ASSERT(instr->external_pointer()->representation().IsExternal());
-  ASSERT(instr->key()->representation().IsInteger32() ||
-         instr->key()->representation().IsTagged());
-
-  LOperand* external_pointer = UseRegister(instr->external_pointer());
+        (elements_kind == EXTERNAL_DOUBLE_ELEMENTS))));
+  ASSERT(instr->elements()->representation().IsExternal());
   bool val_is_temp_register =
       elements_kind == EXTERNAL_PIXEL_ELEMENTS ||
       elements_kind == EXTERNAL_FLOAT_ELEMENTS;
-  LOperand* val = val_is_temp_register
-      ? UseTempRegister(instr->value())
+  LOperand* val = val_is_temp_register ? UseTempRegister(instr->value())
       : UseRegister(instr->value());
-  LOperand* key = UseRegisterOrConstant(instr->key());
+  LOperand* key = UseRegisterOrConstantAtStart(instr->key());
+  LOperand* external_pointer = UseRegister(instr->elements());
 
-  return new(zone()) LStoreKeyedSpecializedArrayElement(external_pointer,
-                                                        key,
-                                                        val);
+  return new(zone()) LStoreKeyed(external_pointer, key, val);
 }
 
 
@@ -2068,6 +2061,7 @@ LInstruction* LChunkBuilder::DoDeleteProperty(HDeleteProperty* instr) {
 
 
 LInstruction* LChunkBuilder::DoOsrEntry(HOsrEntry* instr) {
+  ASSERT(argument_count_ == 0);
   allocator_->MarkAsOsrEntry();
   current_block_->last_environment()->set_ast_id(instr->ast_id());
   return AssignEnvironment(new(zone()) LOsrEntry);
@@ -2106,12 +2100,10 @@ LInstruction* LChunkBuilder::DoArgumentsObject(HArgumentsObject* instr) {
 
 
 LInstruction* LChunkBuilder::DoAccessArgumentsAt(HAccessArgumentsAt* instr) {
-  LOperand* arguments = UseRegister(instr->arguments());
+  LOperand* args = UseRegister(instr->arguments());
   LOperand* length = UseTempRegister(instr->length());
   LOperand* index = UseRegister(instr->index());
-  LAccessArgumentsAt* result =
-      new(zone()) LAccessArgumentsAt(arguments, length, index);
-  return AssignEnvironment(DefineAsRegister(result));
+  return DefineAsRegister(new(zone()) LAccessArgumentsAt(args, length, index));
 }
 
 
@@ -2146,7 +2138,7 @@ LInstruction* LChunkBuilder::DoSimulate(HSimulate* instr) {
   env->set_ast_id(instr->ast_id());
 
   env->Drop(instr->pop_count());
-  for (int i = 0; i < instr->values()->length(); ++i) {
+  for (int i = instr->values()->length() - 1; i >= 0; --i) {
     HValue* value = instr->values()->at(i);
     if (instr->HasAssignedIndexAt(i)) {
       env->Bind(instr->GetAssignedIndexAt(i), value);
@@ -2195,6 +2187,7 @@ LInstruction* LChunkBuilder::DoEnterInlined(HEnterInlined* instr) {
   if (instr->arguments_var() != NULL) {
     inner->Bind(instr->arguments_var(), graph()->GetArgumentsObject());
   }
+  inner->set_entry(instr);
   current_block_->UpdateEnvironment(inner);
   chunk_->AddInlinedClosure(instr->closure());
   return NULL;
@@ -2206,7 +2199,7 @@ LInstruction* LChunkBuilder::DoLeaveInlined(HLeaveInlined* instr) {
 
   HEnvironment* env = current_block_->last_environment();
 
-  if (instr->arguments_pushed()) {
+  if (env->entry()->arguments_pushed()) {
     int argument_count = env->arguments_environment()->parameter_count();
     pop = new(zone()) LDrop(argument_count);
     argument_count_ -= argument_count;
@@ -2237,9 +2230,7 @@ LInstruction* LChunkBuilder::DoForInPrepareMap(HForInPrepareMap* instr) {
 
 LInstruction* LChunkBuilder::DoForInCacheArray(HForInCacheArray* instr) {
   LOperand* map = UseRegister(instr->map());
-  LOperand* scratch = TempRegister();
-  return AssignEnvironment(DefineAsRegister(
-      new(zone()) LForInCacheArray(map, scratch)));
+  return AssignEnvironment(DefineAsRegister(new(zone()) LForInCacheArray(map)));
 }
 
 
diff --git a/deps/v8/src/mips/lithium-mips.h b/deps/v8/src/mips/lithium-mips.h
index 367cf2a90c..17ef24cb1a 100644
--- a/deps/v8/src/mips/lithium-mips.h
+++ b/deps/v8/src/mips/lithium-mips.h
@@ -125,14 +125,13 @@ class LCodeGen;
   V(LoadFunctionPrototype)                      \
   V(LoadGlobalCell)                             \
   V(LoadGlobalGeneric)                          \
-  V(LoadKeyedFastDoubleElement)                 \
-  V(LoadKeyedFastElement)                       \
+  V(LoadKeyed)                                  \
   V(LoadKeyedGeneric)                           \
-  V(LoadKeyedSpecializedArrayElement)           \
   V(LoadNamedField)                             \
   V(LoadNamedFieldPolymorphic)                  \
   V(LoadNamedGeneric)                           \
   V(MapEnumLength)                              \
+  V(MathExp)                                    \
   V(MathMinMax)                                 \
   V(ModI)                                       \
   V(MulI)                                       \
@@ -156,10 +155,8 @@ class LCodeGen;
   V(StoreContextSlot)                           \
   V(StoreGlobalCell)                            \
   V(StoreGlobalGeneric)                         \
-  V(StoreKeyedFastDoubleElement)                \
-  V(StoreKeyedFastElement)                      \
+  V(StoreKeyed)                                 \
   V(StoreKeyedGeneric)                          \
-  V(StoreKeyedSpecializedArrayElement)          \
   V(StoreNamedField)                            \
   V(StoreNamedGeneric)                          \
   V(StringAdd)                                  \
@@ -259,9 +256,6 @@ class LInstruction: public ZoneObject {
   virtual bool HasResult() const = 0;
   virtual LOperand* result() = 0;
 
-  virtual int TempCount() = 0;
-  virtual LOperand* TempAt(int i) = 0;
-
   LOperand* FirstInput() { return InputAt(0); }
   LOperand* Output() { return HasResult() ? result() : NULL; }
 
@@ -275,6 +269,10 @@ class LInstruction: public ZoneObject {
   virtual int InputCount() = 0;
   virtual LOperand* InputAt(int i) = 0;
 
+  friend class TempIterator;
+  virtual int TempCount() = 0;
+  virtual LOperand* TempAt(int i) = 0;
+
   LEnvironment* environment_;
   SetOncePointer<LPointerMap> pointer_map_;
   HValue* hydrogen_value_;
@@ -295,11 +293,6 @@ class LTemplateInstruction: public LInstruction {
   void set_result(LOperand* operand) { results_[0] = operand; }
   LOperand* result() { return results_[0]; }
 
-  LOperand* InputAt(int i) { return inputs_[i]; }
-
-  int TempCount() { return T; }
-  LOperand* TempAt(int i) { return temps_[i]; }
-
  protected:
   EmbeddedContainer<LOperand*, R> results_;
   EmbeddedContainer<LOperand*, I> inputs_;
@@ -307,6 +300,10 @@ class LTemplateInstruction: public LInstruction {
 
  private:
   virtual int InputCount() { return I; }
+  virtual LOperand* InputAt(int i) { return inputs_[i]; }
+
+  virtual int TempCount() { return T; }
+  virtual LOperand* TempAt(int i) { return temps_[i]; }
 };
 
 
@@ -524,6 +521,8 @@ class LArgumentsLength: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = elements;
   }
 
+  LOperand* elements() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(ArgumentsLength, "arguments-length")
 };
 
@@ -550,16 +549,22 @@ class LModI: public LTemplateInstruction<1, 2, 3> {
   // Used for the standard case.
   LModI(LOperand* left,
         LOperand* right,
-        LOperand* temp1,
+        LOperand* temp,
         LOperand* temp2,
         LOperand* temp3) {
     inputs_[0] = left;
     inputs_[1] = right;
-    temps_[0] = temp1;
+    temps_[0] = temp;
     temps_[1] = temp2;
     temps_[2] = temp3;
   }
 
+  LOperand* left() { return inputs_[0]; }
+  LOperand* right() { return inputs_[1]; }
+  LOperand* temp() { return temps_[0]; }
+  LOperand* temp2() { return temps_[1]; }
+  LOperand* temp3() { return temps_[2]; }
+
   DECLARE_CONCRETE_INSTRUCTION(ModI, "mod-i")
   DECLARE_HYDROGEN_ACCESSOR(Mod)
 };
@@ -572,6 +577,9 @@ class LDivI: public LTemplateInstruction<1, 2, 0> {
     inputs_[1] = right;
   }
 
+  LOperand* left() { return inputs_[0]; }
+  LOperand* right() { return inputs_[1]; }
+
   DECLARE_CONCRETE_INSTRUCTION(DivI, "div-i")
   DECLARE_HYDROGEN_ACCESSOR(Div)
 };
@@ -585,6 +593,10 @@ class LMulI: public LTemplateInstruction<1, 2, 1> {
     temps_[0] = temp;
   }
 
+  LOperand* left() { return inputs_[0]; }
+  LOperand* right() { return inputs_[1]; }
+  LOperand* temp() { return temps_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(MulI, "mul-i")
   DECLARE_HYDROGEN_ACCESSOR(Mul)
 };
@@ -597,12 +609,15 @@ class LCmpIDAndBranch: public LControlInstruction<2, 0> {
     inputs_[1] = right;
   }
 
+  LOperand* left() { return inputs_[0]; }
+  LOperand* right() { return inputs_[1]; }
+
   DECLARE_CONCRETE_INSTRUCTION(CmpIDAndBranch, "cmp-id-and-branch")
   DECLARE_HYDROGEN_ACCESSOR(CompareIDAndBranch)
 
   Token::Value op() const { return hydrogen()->token(); }
   bool is_double() const {
-    return hydrogen()->GetInputRepresentation().IsDouble();
+    return hydrogen()->representation().IsDouble();
   }
 
   virtual void PrintDataTo(StringStream* stream);
@@ -616,6 +631,9 @@ class LUnaryMathOperation: public LTemplateInstruction<1, 1, 1> {
     temps_[0] = temp;
   }
 
+  LOperand* value() { return inputs_[0]; }
+  LOperand* temp() { return temps_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(UnaryMathOperation, "unary-math-operation")
   DECLARE_HYDROGEN_ACCESSOR(UnaryMathOperation)
 
@@ -624,6 +642,30 @@ class LUnaryMathOperation: public LTemplateInstruction<1, 1, 1> {
 };
 
 
+class LMathExp: public LTemplateInstruction<1, 1, 3> {
+ public:
+  LMathExp(LOperand* value,
+           LOperand* double_temp,
+           LOperand* temp1,
+           LOperand* temp2) {
+    inputs_[0] = value;
+    temps_[0] = temp1;
+    temps_[1] = temp2;
+    temps_[2] = double_temp;
+    ExternalReference::InitializeMathExpData();
+  }
+
+  LOperand* value() { return inputs_[0]; }
+  LOperand* temp1() { return temps_[0]; }
+  LOperand* temp2() { return temps_[1]; }
+  LOperand* double_temp() { return temps_[2]; }
+
+  DECLARE_CONCRETE_INSTRUCTION(MathExp, "math-exp")
+
+  virtual void PrintDataTo(StringStream* stream);
+};
+
+
 class LCmpObjectEqAndBranch: public LControlInstruction<2, 0> {
  public:
   LCmpObjectEqAndBranch(LOperand* left, LOperand* right) {
@@ -631,6 +673,9 @@ class LCmpObjectEqAndBranch: public LControlInstruction<2, 0> {
     inputs_[1] = right;
   }
 
+  LOperand* left() { return inputs_[0]; }
+  LOperand* right() { return inputs_[1]; }
+
   DECLARE_CONCRETE_INSTRUCTION(CmpObjectEqAndBranch,
                                "cmp-object-eq-and-branch")
   DECLARE_HYDROGEN_ACCESSOR(CompareObjectEqAndBranch)
@@ -643,6 +688,8 @@ class LCmpConstantEqAndBranch: public LControlInstruction<1, 0> {
     inputs_[0] = left;
   }
 
+  LOperand* left() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(CmpConstantEqAndBranch,
                                "cmp-constant-eq-and-branch")
   DECLARE_HYDROGEN_ACCESSOR(CompareConstantEqAndBranch)
@@ -655,6 +702,8 @@ class LIsNilAndBranch: public LControlInstruction<1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(IsNilAndBranch, "is-nil-and-branch")
   DECLARE_HYDROGEN_ACCESSOR(IsNilAndBranch)
 
@@ -672,6 +721,9 @@ class LIsObjectAndBranch: public LControlInstruction<1, 1> {
     temps_[0] = temp;
   }
 
+  LOperand* value() { return inputs_[0]; }
+  LOperand* temp() { return temps_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(IsObjectAndBranch, "is-object-and-branch")
   DECLARE_HYDROGEN_ACCESSOR(IsObjectAndBranch)
 
@@ -686,6 +738,9 @@ class LIsStringAndBranch: public LControlInstruction<1, 1> {
     temps_[0] = temp;
   }
 
+  LOperand* value() { return inputs_[0]; }
+  LOperand* temp() { return temps_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(IsStringAndBranch, "is-string-and-branch")
   DECLARE_HYDROGEN_ACCESSOR(IsStringAndBranch)
 
@@ -699,6 +754,8 @@ class LIsSmiAndBranch: public LControlInstruction<1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(IsSmiAndBranch, "is-smi-and-branch")
   DECLARE_HYDROGEN_ACCESSOR(IsSmiAndBranch)
 
@@ -713,6 +770,9 @@ class LIsUndetectableAndBranch: public LControlInstruction<1, 1> {
     temps_[0] = temp;
   }
 
+  LOperand* value() { return inputs_[0]; }
+  LOperand* temp() { return temps_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(IsUndetectableAndBranch,
                                "is-undetectable-and-branch")
   DECLARE_HYDROGEN_ACCESSOR(IsUndetectableAndBranch)
@@ -728,6 +788,9 @@ class LStringCompareAndBranch: public LControlInstruction<2, 0> {
     inputs_[1] = right;
   }
 
+  LOperand* left() { return inputs_[0]; }
+  LOperand* right() { return inputs_[1]; }
+
   DECLARE_CONCRETE_INSTRUCTION(StringCompareAndBranch,
                                "string-compare-and-branch")
   DECLARE_HYDROGEN_ACCESSOR(StringCompareAndBranch)
@@ -744,6 +807,8 @@ class LHasInstanceTypeAndBranch: public LControlInstruction<1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(HasInstanceTypeAndBranch,
                                "has-instance-type-and-branch")
   DECLARE_HYDROGEN_ACCESSOR(HasInstanceTypeAndBranch)
@@ -758,6 +823,8 @@ class LGetCachedArrayIndex: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(GetCachedArrayIndex, "get-cached-array-index")
   DECLARE_HYDROGEN_ACCESSOR(GetCachedArrayIndex)
 };
@@ -769,6 +836,8 @@ class LHasCachedArrayIndexAndBranch: public LControlInstruction<1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(HasCachedArrayIndexAndBranch,
                                "has-cached-array-index-and-branch")
   DECLARE_HYDROGEN_ACCESSOR(HasCachedArrayIndexAndBranch)
@@ -784,6 +853,9 @@ class LClassOfTestAndBranch: public LControlInstruction<1, 1> {
     temps_[0] = temp;
   }
 
+  LOperand* value() { return inputs_[0]; }
+  LOperand* temp() { return temps_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(ClassOfTestAndBranch,
                                "class-of-test-and-branch")
   DECLARE_HYDROGEN_ACCESSOR(ClassOfTestAndBranch)
@@ -799,6 +871,9 @@ class LCmpT: public LTemplateInstruction<1, 2, 0> {
     inputs_[1] = right;
   }
 
+  LOperand* left() { return inputs_[0]; }
+  LOperand* right() { return inputs_[1]; }
+
   DECLARE_CONCRETE_INSTRUCTION(CmpT, "cmp-t")
   DECLARE_HYDROGEN_ACCESSOR(CompareGeneric)
 
@@ -813,6 +888,9 @@ class LInstanceOf: public LTemplateInstruction<1, 2, 0> {
     inputs_[1] = right;
   }
 
+  LOperand* left() { return inputs_[0]; }
+  LOperand* right() { return inputs_[1]; }
+
   DECLARE_CONCRETE_INSTRUCTION(InstanceOf, "instance-of")
 };
 
@@ -824,6 +902,9 @@ class LInstanceOfKnownGlobal: public LTemplateInstruction<1, 1, 1> {
     temps_[0] = temp;
   }
 
+  LOperand* value() { return inputs_[0]; }
+  LOperand* temp() { return temps_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(InstanceOfKnownGlobal,
                                "instance-of-known-global")
   DECLARE_HYDROGEN_ACCESSOR(InstanceOfKnownGlobal)
@@ -863,6 +944,9 @@ class LBitI: public LTemplateInstruction<1, 2, 0> {
     inputs_[1] = right;
   }
 
+  LOperand* left() { return inputs_[0]; }
+  LOperand* right() { return inputs_[1]; }
+
   Token::Value op() const { return hydrogen()->op(); }
 
   DECLARE_CONCRETE_INSTRUCTION(BitI, "bit-i")
@@ -879,7 +963,8 @@ class LShiftI: public LTemplateInstruction<1, 2, 0> {
   }
 
   Token::Value op() const { return op_; }
-
+  LOperand* left() { return inputs_[0]; }
+  LOperand* right() { return inputs_[1]; }
   bool can_deopt() const { return can_deopt_; }
 
   DECLARE_CONCRETE_INSTRUCTION(ShiftI, "shift-i")
@@ -897,6 +982,9 @@ class LSubI: public LTemplateInstruction<1, 2, 0> {
     inputs_[1] = right;
   }
 
+  LOperand* left() { return inputs_[0]; }
+  LOperand* right() { return inputs_[1]; }
+
   DECLARE_CONCRETE_INSTRUCTION(SubI, "sub-i")
   DECLARE_HYDROGEN_ACCESSOR(Sub)
 };
@@ -935,6 +1023,8 @@ class LBranch: public LControlInstruction<1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(Branch, "branch")
   DECLARE_HYDROGEN_ACCESSOR(Branch)
 
@@ -949,6 +1039,9 @@ class LCmpMapAndBranch: public LTemplateInstruction<0, 1, 1> {
     temps_[0] = temp;
   }
 
+  LOperand* value() { return inputs_[0]; }
+  LOperand* temp() { return temps_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(CmpMapAndBranch, "cmp-map-and-branch")
   DECLARE_HYDROGEN_ACCESSOR(CompareMap)
 
@@ -970,6 +1063,8 @@ class LJSArrayLength: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(JSArrayLength, "js-array-length")
   DECLARE_HYDROGEN_ACCESSOR(JSArrayLength)
 };
@@ -981,6 +1076,8 @@ class LFixedArrayBaseLength: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(FixedArrayBaseLength,
                                "fixed-array-base-length")
   DECLARE_HYDROGEN_ACCESSOR(FixedArrayBaseLength)
@@ -993,6 +1090,8 @@ class LMapEnumLength: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(MapEnumLength, "map-enum-length")
 };
 
@@ -1003,6 +1102,8 @@ class LElementsKind: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(ElementsKind, "elements-kind")
   DECLARE_HYDROGEN_ACCESSOR(ElementsKind)
 };
@@ -1015,6 +1116,9 @@ class LValueOf: public LTemplateInstruction<1, 1, 1> {
     temps_[0] = temp;
   }
 
+  LOperand* value() { return inputs_[0]; }
+  LOperand* temp() { return temps_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(ValueOf, "value-of")
   DECLARE_HYDROGEN_ACCESSOR(ValueOf)
 };
@@ -1027,9 +1131,12 @@ class LDateField: public LTemplateInstruction<1, 1, 1> {
     temps_[0] = temp;
   }
 
+  LOperand* date() { return inputs_[0]; }
+  LOperand* temp() { return temps_[0]; }
+  Smi* index() const { return index_; }
+
   DECLARE_CONCRETE_INSTRUCTION(ValueOf, "date-field")
   DECLARE_HYDROGEN_ACCESSOR(ValueOf)
-  Smi* index() const { return index_; }
 
  private:
   Smi* index_;
@@ -1042,6 +1149,8 @@ class LThrow: public LTemplateInstruction<0, 1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(Throw, "throw")
 };
 
@@ -1052,6 +1161,8 @@ class LBitNotI: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(BitNotI, "bit-not-i")
 };
 
@@ -1063,6 +1174,9 @@ class LAddI: public LTemplateInstruction<1, 2, 0> {
     inputs_[1] = right;
   }
 
+  LOperand* left() { return inputs_[0]; }
+  LOperand* right() { return inputs_[1]; }
+
   DECLARE_CONCRETE_INSTRUCTION(AddI, "add-i")
   DECLARE_HYDROGEN_ACCESSOR(Add)
 };
@@ -1075,6 +1189,9 @@ class LMathMinMax: public LTemplateInstruction<1, 2, 0> {
     inputs_[1] = right;
   }
 
+  LOperand* left() { return inputs_[0]; }
+  LOperand* right() { return inputs_[1]; }
+
   DECLARE_CONCRETE_INSTRUCTION(MathMinMax, "min-max")
   DECLARE_HYDROGEN_ACCESSOR(MathMinMax)
 };
@@ -1087,6 +1204,9 @@ class LPower: public LTemplateInstruction<1, 2, 0> {
     inputs_[1] = right;
   }
 
+  LOperand* left() { return inputs_[0]; }
+  LOperand* right() { return inputs_[1]; }
+
   DECLARE_CONCRETE_INSTRUCTION(Power, "power")
   DECLARE_HYDROGEN_ACCESSOR(Power)
 };
@@ -1098,6 +1218,8 @@ class LRandom: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = global_object;
   }
 
+  LOperand* global_object() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(Random, "random")
   DECLARE_HYDROGEN_ACCESSOR(Random)
 };
@@ -1112,6 +1234,8 @@ class LArithmeticD: public LTemplateInstruction<1, 2, 0> {
   }
 
   Token::Value op() const { return op_; }
+  LOperand* left() { return inputs_[0]; }
+  LOperand* right() { return inputs_[1]; }
 
   virtual Opcode opcode() const { return LInstruction::kArithmeticD; }
   virtual void CompileToNative(LCodeGen* generator);
@@ -1130,12 +1254,14 @@ class LArithmeticT: public LTemplateInstruction<1, 2, 0> {
     inputs_[1] = right;
   }
 
+  LOperand* left() { return inputs_[0]; }
+  LOperand* right() { return inputs_[1]; }
+  Token::Value op() const { return op_; }
+
   virtual Opcode opcode() const { return LInstruction::kArithmeticT; }
   virtual void CompileToNative(LCodeGen* generator);
   virtual const char* Mnemonic() const;
 
-  Token::Value op() const { return op_; }
-
  private:
   Token::Value op_;
 };
@@ -1147,6 +1273,8 @@ class LReturn: public LTemplateInstruction<0, 1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(Return, "return")
 };
 
@@ -1157,6 +1285,8 @@ class LLoadNamedField: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = object;
   }
 
+  LOperand* object() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(LoadNamedField, "load-named-field")
   DECLARE_HYDROGEN_ACCESSOR(LoadNamedField)
 };
@@ -1168,10 +1298,10 @@ class LLoadNamedFieldPolymorphic: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = object;
   }
 
+  LOperand* object() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(LoadNamedField, "load-named-field-polymorphic")
   DECLARE_HYDROGEN_ACCESSOR(LoadNamedFieldPolymorphic)
-
-  LOperand* object() { return inputs_[0]; }
 };
 
 
@@ -1181,10 +1311,11 @@ class LLoadNamedGeneric: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = object;
   }
 
+  LOperand* object() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(LoadNamedGeneric, "load-named-generic")
   DECLARE_HYDROGEN_ACCESSOR(LoadNamedGeneric)
 
-  LOperand* object() { return inputs_[0]; }
   Handle<Object> name() const { return hydrogen()->name(); }
 };
 
@@ -1195,10 +1326,10 @@ class LLoadFunctionPrototype: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = function;
   }
 
+  LOperand* function() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(LoadFunctionPrototype, "load-function-prototype")
   DECLARE_HYDROGEN_ACCESSOR(LoadFunctionPrototype)
-
-  LOperand* function() { return inputs_[0]; }
 };
 
 
@@ -1208,6 +1339,8 @@ class LLoadElements: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = object;
   }
 
+  LOperand* object() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(LoadElements, "load-elements")
 };
 
@@ -1218,76 +1351,48 @@ class LLoadExternalArrayPointer: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = object;
   }
 
+  LOperand* object() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(LoadExternalArrayPointer,
                                "load-external-array-pointer")
 };
 
 
-class LLoadKeyedFastElement: public LTemplateInstruction<1, 2, 0> {
+class LLoadKeyed: public LTemplateInstruction<1, 2, 0> {
  public:
-  LLoadKeyedFastElement(LOperand* elements, LOperand* key) {
+  LLoadKeyed(LOperand* elements, LOperand* key) {
     inputs_[0] = elements;
     inputs_[1] = key;
   }
 
-  DECLARE_CONCRETE_INSTRUCTION(LoadKeyedFastElement, "load-keyed-fast-element")
-  DECLARE_HYDROGEN_ACCESSOR(LoadKeyedFastElement)
-
   LOperand* elements() { return inputs_[0]; }
   LOperand* key() { return inputs_[1]; }
-  uint32_t additional_index() const { return hydrogen()->index_offset(); }
-};
-
-
-class LLoadKeyedFastDoubleElement: public LTemplateInstruction<1, 2, 0> {
- public:
-  LLoadKeyedFastDoubleElement(LOperand* elements, LOperand* key) {
-    inputs_[0] = elements;
-    inputs_[1] = key;
+  ElementsKind elements_kind() const {
+    return hydrogen()->elements_kind();
   }
-
-  DECLARE_CONCRETE_INSTRUCTION(LoadKeyedFastDoubleElement,
-                               "load-keyed-fast-double-element")
-  DECLARE_HYDROGEN_ACCESSOR(LoadKeyedFastDoubleElement)
-
-  LOperand* elements() { return inputs_[0]; }
-  LOperand* key() { return inputs_[1]; }
-  uint32_t additional_index() const { return hydrogen()->index_offset(); }
-};
-
-
-class LLoadKeyedSpecializedArrayElement: public LTemplateInstruction<1, 2, 0> {
- public:
-    LLoadKeyedSpecializedArrayElement(LOperand* external_pointer,
-                                      LOperand* key) {
-    inputs_[0] = external_pointer;
-    inputs_[1] = key;
+  bool is_external() const {
+    return hydrogen()->is_external();
   }
 
-  DECLARE_CONCRETE_INSTRUCTION(LoadKeyedSpecializedArrayElement,
-                               "load-keyed-specialized-array-element")
-  DECLARE_HYDROGEN_ACCESSOR(LoadKeyedSpecializedArrayElement)
+  DECLARE_CONCRETE_INSTRUCTION(LoadKeyed, "load-keyed")
+  DECLARE_HYDROGEN_ACCESSOR(LoadKeyed)
 
-  LOperand* external_pointer() { return inputs_[0]; }
-  LOperand* key() { return inputs_[1]; }
-  ElementsKind elements_kind() const {
-    return hydrogen()->elements_kind();
-  }
+  virtual void PrintDataTo(StringStream* stream);
   uint32_t additional_index() const { return hydrogen()->index_offset(); }
 };
 
 
 class LLoadKeyedGeneric: public LTemplateInstruction<1, 2, 0> {
  public:
-  LLoadKeyedGeneric(LOperand* obj, LOperand* key) {
-    inputs_[0] = obj;
+  LLoadKeyedGeneric(LOperand* object, LOperand* key) {
+    inputs_[0] = object;
     inputs_[1] = key;
   }
 
-  DECLARE_CONCRETE_INSTRUCTION(LoadKeyedGeneric, "load-keyed-generic")
-
   LOperand* object() { return inputs_[0]; }
   LOperand* key() { return inputs_[1]; }
+
+  DECLARE_CONCRETE_INSTRUCTION(LoadKeyedGeneric, "load-keyed-generic")
 };
 
 
@@ -1304,10 +1409,11 @@ class LLoadGlobalGeneric: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = global_object;
   }
 
+  LOperand* global_object() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(LoadGlobalGeneric, "load-global-generic")
   DECLARE_HYDROGEN_ACCESSOR(LoadGlobalGeneric)
 
-  LOperand* global_object() { return inputs_[0]; }
   Handle<Object> name() const { return hydrogen()->name(); }
   bool for_typeof() const { return hydrogen()->for_typeof(); }
 };
@@ -1320,10 +1426,11 @@ class LStoreGlobalCell: public LTemplateInstruction<0, 1, 1> {
     temps_[0] = temp;
   }
 
+  LOperand* value() { return inputs_[0]; }
+  LOperand* temp() { return temps_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(StoreGlobalCell, "store-global-cell")
   DECLARE_HYDROGEN_ACCESSOR(StoreGlobalCell)
-
-  LOperand* value() { return inputs_[0]; }
 };
 
 
@@ -1335,12 +1442,13 @@ class LStoreGlobalGeneric: public LTemplateInstruction<0, 2, 0> {
     inputs_[1] = value;
   }
 
+  LOperand* global_object() { return inputs_[0]; }
+  LOperand* value() { return inputs_[1]; }
+
   DECLARE_CONCRETE_INSTRUCTION(StoreGlobalGeneric, "store-global-generic")
   DECLARE_HYDROGEN_ACCESSOR(StoreGlobalGeneric)
 
-  LOperand* global_object() { return InputAt(0); }
   Handle<Object> name() const { return hydrogen()->name(); }
-  LOperand* value() { return InputAt(1); }
   StrictModeFlag strict_mode_flag() { return hydrogen()->strict_mode_flag(); }
 };
 
@@ -1351,10 +1459,11 @@ class LLoadContextSlot: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = context;
   }
 
+  LOperand* context() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(LoadContextSlot, "load-context-slot")
   DECLARE_HYDROGEN_ACCESSOR(LoadContextSlot)
 
-  LOperand* context() { return InputAt(0); }
   int slot_index() { return hydrogen()->slot_index(); }
 
   virtual void PrintDataTo(StringStream* stream);
@@ -1368,11 +1477,12 @@ class LStoreContextSlot: public LTemplateInstruction<0, 2, 0> {
     inputs_[1] = value;
   }
 
+  LOperand* context() { return inputs_[0]; }
+  LOperand* value() { return inputs_[1]; }
+
   DECLARE_CONCRETE_INSTRUCTION(StoreContextSlot, "store-context-slot")
   DECLARE_HYDROGEN_ACCESSOR(StoreContextSlot)
 
-  LOperand* context() { return InputAt(0); }
-  LOperand* value() { return InputAt(1); }
   int slot_index() { return hydrogen()->slot_index(); }
 
   virtual void PrintDataTo(StringStream* stream);
@@ -1385,6 +1495,8 @@ class LPushArgument: public LTemplateInstruction<0, 1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(PushArgument, "push-argument")
 };
 
@@ -1421,9 +1533,9 @@ class LOuterContext: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = context;
   }
 
-  DECLARE_CONCRETE_INSTRUCTION(OuterContext, "outer-context")
+  LOperand* context() { return inputs_[0]; }
 
-  LOperand* context() { return InputAt(0); }
+  DECLARE_CONCRETE_INSTRUCTION(OuterContext, "outer-context")
 };
 
 
@@ -1440,9 +1552,9 @@ class LGlobalObject: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = context;
   }
 
-  DECLARE_CONCRETE_INSTRUCTION(GlobalObject, "global-object")
+  LOperand* context() { return inputs_[0]; }
 
-  LOperand* context() { return InputAt(0); }
+  DECLARE_CONCRETE_INSTRUCTION(GlobalObject, "global-object")
 };
 
 
@@ -1452,9 +1564,9 @@ class LGlobalReceiver: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = global_object;
   }
 
-  DECLARE_CONCRETE_INSTRUCTION(GlobalReceiver, "global-receiver")
+  LOperand* global_object() { return inputs_[0]; }
 
-  LOperand* global() { return InputAt(0); }
+  DECLARE_CONCRETE_INSTRUCTION(GlobalReceiver, "global-receiver")
 };
 
 
@@ -1476,11 +1588,11 @@ class LInvokeFunction: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = function;
   }
 
+  LOperand* function() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(InvokeFunction, "invoke-function")
   DECLARE_HYDROGEN_ACCESSOR(InvokeFunction)
 
-  LOperand* function() { return inputs_[0]; }
-
   virtual void PrintDataTo(StringStream* stream);
 
   int arity() const { return hydrogen()->argument_count() - 1; }
@@ -1494,6 +1606,8 @@ class LCallKeyed: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = key;
   }
 
+  LOperand* key() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(CallKeyed, "call-keyed")
   DECLARE_HYDROGEN_ACCESSOR(CallKeyed)
 
@@ -1522,10 +1636,11 @@ class LCallFunction: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = function;
   }
 
+  LOperand* function() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(CallFunction, "call-function")
   DECLARE_HYDROGEN_ACCESSOR(CallFunction)
 
-  LOperand* function() { return inputs_[0]; }
   int arity() const { return hydrogen()->argument_count() - 1; }
 };
 
@@ -1560,6 +1675,8 @@ class LCallNew: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = constructor;
   }
 
+  LOperand* constructor() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(CallNew, "call-new")
   DECLARE_HYDROGEN_ACCESSOR(CallNew)
 
@@ -1585,6 +1702,8 @@ class LInteger32ToDouble: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(Integer32ToDouble, "int32-to-double")
 };
 
@@ -1595,6 +1714,8 @@ class LUint32ToDouble: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(Uint32ToDouble, "uint32-to-double")
 };
 
@@ -1605,6 +1726,8 @@ class LNumberTagI: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(NumberTagI, "number-tag-i")
 };
 
@@ -1615,18 +1738,24 @@ class LNumberTagU: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(NumberTagU, "number-tag-u")
 };
 
 
 class LNumberTagD: public LTemplateInstruction<1, 1, 2> {
  public:
-  LNumberTagD(LOperand* value, LOperand* temp1, LOperand* temp2) {
+  LNumberTagD(LOperand* value, LOperand* temp, LOperand* temp2) {
     inputs_[0] = value;
-    temps_[0] = temp1;
+    temps_[0] = temp;
     temps_[1] = temp2;
   }
 
+  LOperand* value() { return inputs_[0]; }
+  LOperand* temp() { return temps_[0]; }
+  LOperand* temp2() { return temps_[1]; }
+
   DECLARE_CONCRETE_INSTRUCTION(NumberTagD, "number-tag-d")
 };
 
@@ -1634,12 +1763,16 @@ class LNumberTagD: public LTemplateInstruction<1, 1, 2> {
 // Sometimes truncating conversion from a tagged value to an int32.
 class LDoubleToI: public LTemplateInstruction<1, 1, 2> {
  public:
-  LDoubleToI(LOperand* value, LOperand* temp1, LOperand* temp2) {
+  LDoubleToI(LOperand* value, LOperand* temp, LOperand* temp2) {
     inputs_[0] = value;
-    temps_[0] = temp1;
+    temps_[0] = temp;
     temps_[1] = temp2;
   }
 
+  LOperand* value() { return inputs_[0]; }
+  LOperand* temp() { return temps_[0]; }
+  LOperand* temp2() { return temps_[1]; }
+
   DECLARE_CONCRETE_INSTRUCTION(DoubleToI, "double-to-i")
   DECLARE_HYDROGEN_ACCESSOR(UnaryOperation)
 
@@ -1651,15 +1784,20 @@ class LDoubleToI: public LTemplateInstruction<1, 1, 2> {
 class LTaggedToI: public LTemplateInstruction<1, 1, 3> {
  public:
   LTaggedToI(LOperand* value,
-             LOperand* temp1,
+             LOperand* temp,
              LOperand* temp2,
              LOperand* temp3) {
     inputs_[0] = value;
-    temps_[0] = temp1;
+    temps_[0] = temp;
     temps_[1] = temp2;
     temps_[2] = temp3;
   }
 
+  LOperand* value() { return inputs_[0]; }
+  LOperand* temp() { return temps_[0]; }
+  LOperand* temp2() { return temps_[1]; }
+  LOperand* temp3() { return temps_[2]; }
+
   DECLARE_CONCRETE_INSTRUCTION(TaggedToI, "tagged-to-i")
   DECLARE_HYDROGEN_ACCESSOR(UnaryOperation)
 
@@ -1673,6 +1811,8 @@ class LSmiTag: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(SmiTag, "smi-tag")
 };
 
@@ -1683,6 +1823,8 @@ class LNumberUntagD: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(NumberUntagD, "double-untag")
   DECLARE_HYDROGEN_ACCESSOR(Change)
 };
@@ -1695,10 +1837,11 @@ class LSmiUntag: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = value;
   }
 
-  DECLARE_CONCRETE_INSTRUCTION(SmiUntag, "smi-untag")
-
+  LOperand* value() { return inputs_[0]; }
   bool needs_check() const { return needs_check_; }
 
+  DECLARE_CONCRETE_INSTRUCTION(SmiUntag, "smi-untag")
+
  private:
   bool needs_check_;
 };
@@ -1706,20 +1849,21 @@ class LSmiUntag: public LTemplateInstruction<1, 1, 0> {
 
 class LStoreNamedField: public LTemplateInstruction<0, 2, 1> {
  public:
-  LStoreNamedField(LOperand* obj, LOperand* val, LOperand* temp) {
-    inputs_[0] = obj;
-    inputs_[1] = val;
+  LStoreNamedField(LOperand* object, LOperand* value, LOperand* temp) {
+    inputs_[0] = object;
+    inputs_[1] = value;
     temps_[0] = temp;
   }
 
+  LOperand* object() { return inputs_[0]; }
+  LOperand* value() { return inputs_[1]; }
+  LOperand* temp() { return temps_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(StoreNamedField, "store-named-field")
   DECLARE_HYDROGEN_ACCESSOR(StoreNamedField)
 
   virtual void PrintDataTo(StringStream* stream);
 
-  LOperand* object() { return inputs_[0]; }
-  LOperand* value() { return inputs_[1]; }
-
   Handle<Object> name() const { return hydrogen()->name(); }
   bool is_in_object() { return hydrogen()->is_in_object(); }
   int offset() { return hydrogen()->offset(); }
@@ -1729,109 +1873,67 @@ class LStoreNamedField: public LTemplateInstruction<0, 2, 1> {
 
 class LStoreNamedGeneric: public LTemplateInstruction<0, 2, 0> {
  public:
-  LStoreNamedGeneric(LOperand* obj, LOperand* val) {
-    inputs_[0] = obj;
-    inputs_[1] = val;
+  LStoreNamedGeneric(LOperand* object, LOperand* value) {
+    inputs_[0] = object;
+    inputs_[1] = value;
   }
 
+  LOperand* object() { return inputs_[0]; }
+  LOperand* value() { return inputs_[1]; }
+
   DECLARE_CONCRETE_INSTRUCTION(StoreNamedGeneric, "store-named-generic")
   DECLARE_HYDROGEN_ACCESSOR(StoreNamedGeneric)
 
   virtual void PrintDataTo(StringStream* stream);
 
-  LOperand* object() { return inputs_[0]; }
-  LOperand* value() { return inputs_[1]; }
   Handle<Object> name() const { return hydrogen()->name(); }
   StrictModeFlag strict_mode_flag() { return hydrogen()->strict_mode_flag(); }
 };
 
 
-class LStoreKeyedFastElement: public LTemplateInstruction<0, 3, 0> {
+class LStoreKeyed: public LTemplateInstruction<0, 3, 0> {
  public:
-  LStoreKeyedFastElement(LOperand* obj, LOperand* key, LOperand* val) {
-    inputs_[0] = obj;
+  LStoreKeyed(LOperand* object, LOperand* key, LOperand* value) {
+    inputs_[0] = object;
     inputs_[1] = key;
-    inputs_[2] = val;
+    inputs_[2] = value;
   }
 
-  DECLARE_CONCRETE_INSTRUCTION(StoreKeyedFastElement,
-                               "store-keyed-fast-element")
-  DECLARE_HYDROGEN_ACCESSOR(StoreKeyedFastElement)
-
-  virtual void PrintDataTo(StringStream* stream);
-
-  LOperand* object() { return inputs_[0]; }
+  bool is_external() const { return hydrogen()->is_external(); }
+  LOperand* elements() { return inputs_[0]; }
   LOperand* key() { return inputs_[1]; }
   LOperand* value() { return inputs_[2]; }
-  uint32_t additional_index() const { return hydrogen()->index_offset(); }
-};
-
-
-class LStoreKeyedFastDoubleElement: public LTemplateInstruction<0, 3, 0> {
- public:
-  LStoreKeyedFastDoubleElement(LOperand* elements,
-                               LOperand* key,
-                               LOperand* val) {
-    inputs_[0] = elements;
-    inputs_[1] = key;
-    inputs_[2] = val;
+  ElementsKind elements_kind() const {
+    return hydrogen()->elements_kind();
   }
 
-  DECLARE_CONCRETE_INSTRUCTION(StoreKeyedFastDoubleElement,
-                               "store-keyed-fast-double-element")
-  DECLARE_HYDROGEN_ACCESSOR(StoreKeyedFastDoubleElement)
+  DECLARE_CONCRETE_INSTRUCTION(StoreKeyed, "store-keyed")
+  DECLARE_HYDROGEN_ACCESSOR(StoreKeyed)
 
   virtual void PrintDataTo(StringStream* stream);
-
-  LOperand* elements() { return inputs_[0]; }
-  LOperand* key() { return inputs_[1]; }
-  LOperand* value() { return inputs_[2]; }
-  uint32_t additional_index() const { return hydrogen()->index_offset(); }
-
   bool NeedsCanonicalization() { return hydrogen()->NeedsCanonicalization(); }
+  uint32_t additional_index() const { return hydrogen()->index_offset(); }
 };
 
 
 class LStoreKeyedGeneric: public LTemplateInstruction<0, 3, 0> {
  public:
-  LStoreKeyedGeneric(LOperand* obj, LOperand* key, LOperand* val) {
+  LStoreKeyedGeneric(LOperand* obj, LOperand* key, LOperand* value) {
     inputs_[0] = obj;
     inputs_[1] = key;
-    inputs_[2] = val;
+    inputs_[2] = value;
   }
 
-  DECLARE_CONCRETE_INSTRUCTION(StoreKeyedGeneric, "store-keyed-generic")
-  DECLARE_HYDROGEN_ACCESSOR(StoreKeyedGeneric)
-
-  virtual void PrintDataTo(StringStream* stream);
-
   LOperand* object() { return inputs_[0]; }
   LOperand* key() { return inputs_[1]; }
   LOperand* value() { return inputs_[2]; }
-  StrictModeFlag strict_mode_flag() { return hydrogen()->strict_mode_flag(); }
-};
 
-class LStoreKeyedSpecializedArrayElement: public LTemplateInstruction<0, 3, 0> {
- public:
-  LStoreKeyedSpecializedArrayElement(LOperand* external_pointer,
-                                     LOperand* key,
-                                     LOperand* val) {
-    inputs_[0] = external_pointer;
-    inputs_[1] = key;
-    inputs_[2] = val;
-  }
+  DECLARE_CONCRETE_INSTRUCTION(StoreKeyedGeneric, "store-keyed-generic")
+  DECLARE_HYDROGEN_ACCESSOR(StoreKeyedGeneric)
 
-  DECLARE_CONCRETE_INSTRUCTION(StoreKeyedSpecializedArrayElement,
-                               "store-keyed-specialized-array-element")
-  DECLARE_HYDROGEN_ACCESSOR(StoreKeyedSpecializedArrayElement)
+  virtual void PrintDataTo(StringStream* stream);
 
-  LOperand* external_pointer() { return inputs_[0]; }
-  LOperand* key() { return inputs_[1]; }
-  LOperand* value() { return inputs_[2]; }
-  ElementsKind elements_kind() const {
-    return hydrogen()->elements_kind();
-  }
-  uint32_t additional_index() const { return hydrogen()->index_offset(); }
+  StrictModeFlag strict_mode_flag() { return hydrogen()->strict_mode_flag(); }
 };
 
 
@@ -1839,21 +1941,22 @@ class LTransitionElementsKind: public LTemplateInstruction<1, 1, 2> {
  public:
   LTransitionElementsKind(LOperand* object,
                           LOperand* new_map_temp,
-                          LOperand* temp_reg) {
+                          LOperand* temp) {
     inputs_[0] = object;
     temps_[0] = new_map_temp;
-    temps_[1] = temp_reg;
+    temps_[1] = temp;
   }
 
+  LOperand* object() { return inputs_[0]; }
+  LOperand* new_map_temp() { return temps_[0]; }
+  LOperand* temp() { return temps_[1]; }
+
   DECLARE_CONCRETE_INSTRUCTION(TransitionElementsKind,
                                "transition-elements-kind")
   DECLARE_HYDROGEN_ACCESSOR(TransitionElementsKind)
 
   virtual void PrintDataTo(StringStream* stream);
 
-  LOperand* object() { return inputs_[0]; }
-  LOperand* new_map_reg() { return temps_[0]; }
-  LOperand* temp_reg() { return temps_[1]; }
   Handle<Map> original_map() { return hydrogen()->original_map(); }
   Handle<Map> transitioned_map() { return hydrogen()->transitioned_map(); }
 };
@@ -1866,11 +1969,11 @@ class LStringAdd: public LTemplateInstruction<1, 2, 0> {
     inputs_[1] = right;
   }
 
-  DECLARE_CONCRETE_INSTRUCTION(StringAdd, "string-add")
-  DECLARE_HYDROGEN_ACCESSOR(StringAdd)
-
   LOperand* left() { return inputs_[0]; }
   LOperand* right() { return inputs_[1]; }
+
+  DECLARE_CONCRETE_INSTRUCTION(StringAdd, "string-add")
+  DECLARE_HYDROGEN_ACCESSOR(StringAdd)
 };
 
 
@@ -1882,11 +1985,11 @@ class LStringCharCodeAt: public LTemplateInstruction<1, 2, 0> {
     inputs_[1] = index;
   }
 
-  DECLARE_CONCRETE_INSTRUCTION(StringCharCodeAt, "string-char-code-at")
-  DECLARE_HYDROGEN_ACCESSOR(StringCharCodeAt)
-
   LOperand* string() { return inputs_[0]; }
   LOperand* index() { return inputs_[1]; }
+
+  DECLARE_CONCRETE_INSTRUCTION(StringCharCodeAt, "string-char-code-at")
+  DECLARE_HYDROGEN_ACCESSOR(StringCharCodeAt)
 };
 
 
@@ -1896,10 +1999,10 @@ class LStringCharFromCode: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = char_code;
   }
 
+  LOperand* char_code() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(StringCharFromCode, "string-char-from-code")
   DECLARE_HYDROGEN_ACCESSOR(StringCharFromCode)
-
-  LOperand* char_code() { return inputs_[0]; }
 };
 
 
@@ -1909,10 +2012,10 @@ class LStringLength: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = string;
   }
 
+  LOperand* string() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(StringLength, "string-length")
   DECLARE_HYDROGEN_ACCESSOR(StringLength)
-
-  LOperand* string() { return inputs_[0]; }
 };
 
 
@@ -1922,7 +2025,7 @@ class LCheckFunction: public LTemplateInstruction<0, 1, 0> {
     inputs_[0] = value;
   }
 
-  LOperand* value() { return InputAt(0); }
+  LOperand* value() { return inputs_[0]; }
 
   DECLARE_CONCRETE_INSTRUCTION(CheckFunction, "check-function")
   DECLARE_HYDROGEN_ACCESSOR(CheckFunction)
@@ -1935,6 +2038,8 @@ class LCheckInstanceType: public LTemplateInstruction<0, 1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(CheckInstanceType, "check-instance-type")
   DECLARE_HYDROGEN_ACCESSOR(CheckInstanceType)
 };
@@ -1946,18 +2051,23 @@ class LCheckMaps: public LTemplateInstruction<0, 1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(CheckMaps, "check-maps")
   DECLARE_HYDROGEN_ACCESSOR(CheckMaps)
 };
 
 
-class LCheckPrototypeMaps: public LTemplateInstruction<0, 0, 2> {
+class LCheckPrototypeMaps: public LTemplateInstruction<1, 0, 2> {
  public:
-  LCheckPrototypeMaps(LOperand* temp1, LOperand* temp2)  {
-    temps_[0] = temp1;
+  LCheckPrototypeMaps(LOperand* temp, LOperand* temp2)  {
+    temps_[0] = temp;
     temps_[1] = temp2;
   }
 
+  LOperand* temp() { return temps_[0]; }
+  LOperand* temp2() { return temps_[1]; }
+
   DECLARE_CONCRETE_INSTRUCTION(CheckPrototypeMaps, "check-prototype-maps")
   DECLARE_HYDROGEN_ACCESSOR(CheckPrototypeMaps)
 
@@ -1972,6 +2082,8 @@ class LCheckSmi: public LTemplateInstruction<0, 1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(CheckSmi, "check-smi")
 };
 
@@ -1982,18 +2094,21 @@ class LCheckNonSmi: public LTemplateInstruction<0, 1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(CheckNonSmi, "check-non-smi")
 };
 
 
 class LClampDToUint8: public LTemplateInstruction<1, 1, 1> {
  public:
-  LClampDToUint8(LOperand* value, LOperand* temp) {
-    inputs_[0] = value;
+  LClampDToUint8(LOperand* unclamped, LOperand* temp) {
+    inputs_[0] = unclamped;
     temps_[0] = temp;
   }
 
   LOperand* unclamped() { return inputs_[0]; }
+  LOperand* temp() { return temps_[0]; }
 
   DECLARE_CONCRETE_INSTRUCTION(ClampDToUint8, "clamp-d-to-uint8")
 };
@@ -2001,8 +2116,8 @@ class LClampDToUint8: public LTemplateInstruction<1, 1, 1> {
 
 class LClampIToUint8: public LTemplateInstruction<1, 1, 0> {
  public:
-  explicit LClampIToUint8(LOperand* value) {
-    inputs_[0] = value;
+  explicit LClampIToUint8(LOperand* unclamped) {
+    inputs_[0] = unclamped;
   }
 
   LOperand* unclamped() { return inputs_[0]; }
@@ -2013,12 +2128,13 @@ class LClampIToUint8: public LTemplateInstruction<1, 1, 0> {
 
 class LClampTToUint8: public LTemplateInstruction<1, 1, 1> {
  public:
-  LClampTToUint8(LOperand* value, LOperand* temp) {
-    inputs_[0] = value;
+  LClampTToUint8(LOperand* unclamped, LOperand* temp) {
+    inputs_[0] = unclamped;
     temps_[0] = temp;
   }
 
   LOperand* unclamped() { return inputs_[0]; }
+  LOperand* temp() { return temps_[0]; }
 
   DECLARE_CONCRETE_INSTRUCTION(ClampTToUint8, "clamp-t-to-uint8")
 };
@@ -2026,11 +2142,14 @@ class LClampTToUint8: public LTemplateInstruction<1, 1, 1> {
 
 class LAllocateObject: public LTemplateInstruction<1, 0, 2> {
  public:
-  LAllocateObject(LOperand* temp1, LOperand* temp2) {
-    temps_[0] = temp1;
+  LAllocateObject(LOperand* temp, LOperand* temp2) {
+    temps_[0] = temp;
     temps_[1] = temp2;
   }
 
+  LOperand* temp() { return temps_[0]; }
+  LOperand* temp2() { return temps_[1]; }
+
   DECLARE_CONCRETE_INSTRUCTION(AllocateObject, "allocate-object")
   DECLARE_HYDROGEN_ACCESSOR(AllocateObject)
 };
@@ -2079,6 +2198,8 @@ class LToFastProperties: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(ToFastProperties, "to-fast-properties")
   DECLARE_HYDROGEN_ACCESSOR(ToFastProperties)
 };
@@ -2090,6 +2211,8 @@ class LTypeof: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(Typeof, "typeof")
 };
 
@@ -2100,6 +2223,8 @@ class LTypeofIsAndBranch: public LControlInstruction<1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(TypeofIsAndBranch, "typeof-is-and-branch")
   DECLARE_HYDROGEN_ACCESSOR(TypeofIsAndBranch)
 
@@ -2115,6 +2240,8 @@ class LIsConstructCallAndBranch: public LControlInstruction<0, 1> {
     temps_[0] = temp;
   }
 
+  LOperand* temp() { return temps_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(IsConstructCallAndBranch,
                                "is-construct-call-and-branch")
 };
@@ -2122,15 +2249,15 @@ class LIsConstructCallAndBranch: public LControlInstruction<0, 1> {
 
 class LDeleteProperty: public LTemplateInstruction<1, 2, 0> {
  public:
-  LDeleteProperty(LOperand* obj, LOperand* key) {
-    inputs_[0] = obj;
+  LDeleteProperty(LOperand* object, LOperand* key) {
+    inputs_[0] = object;
     inputs_[1] = key;
   }
 
-  DECLARE_CONCRETE_INSTRUCTION(DeleteProperty, "delete-property")
-
   LOperand* object() { return inputs_[0]; }
   LOperand* key() { return inputs_[1]; }
+
+  DECLARE_CONCRETE_INSTRUCTION(DeleteProperty, "delete-property")
 };
 
 
@@ -2195,15 +2322,13 @@ class LForInPrepareMap: public LTemplateInstruction<1, 1, 0> {
 };
 
 
-class LForInCacheArray: public LTemplateInstruction<1, 1, 1> {
+class LForInCacheArray: public LTemplateInstruction<1, 1, 0> {
  public:
-  explicit LForInCacheArray(LOperand* map, LOperand* scratch) {
+  explicit LForInCacheArray(LOperand* map) {
     inputs_[0] = map;
-    temps_[0] = scratch;
   }
 
   LOperand* map() { return inputs_[0]; }
-  LOperand* scratch() { return temps_[0]; }
 
   DECLARE_CONCRETE_INSTRUCTION(ForInCacheArray, "for-in-cache-array")
 
diff --git a/deps/v8/src/mips/macro-assembler-mips.cc b/deps/v8/src/mips/macro-assembler-mips.cc
index 7ded494999..9249917c3f 100644
--- a/deps/v8/src/mips/macro-assembler-mips.cc
+++ b/deps/v8/src/mips/macro-assembler-mips.cc
@@ -1395,49 +1395,68 @@ void MacroAssembler::ConvertToInt32(Register source,
 
 
 void MacroAssembler::EmitFPUTruncate(FPURoundingMode rounding_mode,
-                                     FPURegister result,
+                                     Register result,
                                      DoubleRegister double_input,
-                                     Register scratch1,
+                                     Register scratch,
+                                     DoubleRegister double_scratch,
                                      Register except_flag,
                                      CheckForInexactConversion check_inexact) {
+  ASSERT(!result.is(scratch));
+  ASSERT(!double_input.is(double_scratch));
+  ASSERT(!except_flag.is(scratch));
+
   ASSERT(CpuFeatures::IsSupported(FPU));
   CpuFeatures::Scope scope(FPU);
+  Label done;
+
+  // Clear the except flag (0 = no exception)
+  mov(except_flag, zero_reg);
+
+  // Test for values that can be exactly represented as a signed 32-bit integer.
+  cvt_w_d(double_scratch, double_input);
+  mfc1(result, double_scratch);
+  cvt_d_w(double_scratch, double_scratch);
+  BranchF(&done, NULL, eq, double_input, double_scratch);
 
   int32_t except_mask = kFCSRFlagMask;  // Assume interested in all exceptions.
 
   if (check_inexact == kDontCheckForInexactConversion) {
-    // Ingore inexact exceptions.
+    // Ignore inexact exceptions.
     except_mask &= ~kFCSRInexactFlagMask;
   }
 
   // Save FCSR.
-  cfc1(scratch1, FCSR);
+  cfc1(scratch, FCSR);
   // Disable FPU exceptions.
   ctc1(zero_reg, FCSR);
 
   // Do operation based on rounding mode.
   switch (rounding_mode) {
     case kRoundToNearest:
-      Round_w_d(result, double_input);
+      Round_w_d(double_scratch, double_input);
       break;
     case kRoundToZero:
-      Trunc_w_d(result, double_input);
+      Trunc_w_d(double_scratch, double_input);
       break;
     case kRoundToPlusInf:
-      Ceil_w_d(result, double_input);
+      Ceil_w_d(double_scratch, double_input);
       break;
     case kRoundToMinusInf:
-      Floor_w_d(result, double_input);
+      Floor_w_d(double_scratch, double_input);
       break;
   }  // End of switch-statement.
 
   // Retrieve FCSR.
   cfc1(except_flag, FCSR);
   // Restore FCSR.
-  ctc1(scratch1, FCSR);
+  ctc1(scratch, FCSR);
+  // Move the converted value into the result register.
+  mfc1(result, double_scratch);
 
   // Check for fpu exceptions.
   And(except_flag, except_flag, Operand(except_mask));
+
+  bind(&done);
 }
 
 
@@ -3109,9 +3128,9 @@ void MacroAssembler::AllocateAsciiString(Register result,
                                          Label* gc_required) {
   // Calculate the number of bytes needed for the characters in the string
   // while observing object alignment.
-  ASSERT((SeqAsciiString::kHeaderSize & kObjectAlignmentMask) == 0);
+  ASSERT((SeqOneByteString::kHeaderSize & kObjectAlignmentMask) == 0);
   ASSERT(kCharSize == 1);
-  addiu(scratch1, length, kObjectAlignmentMask + SeqAsciiString::kHeaderSize);
+  addiu(scratch1, length, kObjectAlignmentMask + SeqOneByteString::kHeaderSize);
   And(scratch1, scratch1, Operand(~kObjectAlignmentMask));
 
   // Allocate ASCII string in new space.
@@ -3215,7 +3234,8 @@ void MacroAssembler::AllocateHeapNumber(Register result,
                                         Register scratch1,
                                         Register scratch2,
                                         Register heap_number_map,
-                                        Label* need_gc) {
+                                        Label* need_gc,
+                                        TaggingMode tagging_mode) {
   // Allocate an object in the heap for the heap number and tag it as a heap
   // object.
   AllocateInNewSpace(HeapNumber::kSize,
@@ -3223,11 +3243,16 @@ void MacroAssembler::AllocateHeapNumber(Register result,
                      scratch1,
                      scratch2,
                      need_gc,
-                     TAG_OBJECT);
+                     tagging_mode == TAG_RESULT ? TAG_OBJECT :
+                                                  NO_ALLOCATION_FLAGS);
 
   // Store heap number map in the allocated object.
   AssertRegisterIsRoot(heap_number_map, Heap::kHeapNumberMapRootIndex);
-  sw(heap_number_map, FieldMemOperand(result, HeapObject::kMapOffset));
+  if (tagging_mode == TAG_RESULT) {
+    sw(heap_number_map, FieldMemOperand(result, HeapObject::kMapOffset));
+  } else {
+    sw(heap_number_map, MemOperand(result, HeapObject::kMapOffset));
+  }
 }
 
 
@@ -3380,13 +3405,13 @@ void MacroAssembler::CheckFastSmiElements(Register map,
 
 void MacroAssembler::StoreNumberToDoubleElements(Register value_reg,
                                                  Register key_reg,
-                                                 Register receiver_reg,
                                                  Register elements_reg,
                                                  Register scratch1,
                                                  Register scratch2,
                                                  Register scratch3,
                                                  Register scratch4,
-                                                 Label* fail) {
+                                                 Label* fail,
+                                                 int elements_offset) {
   Label smi_value, maybe_nan, have_double_value, is_nan, done;
   Register mantissa_reg = scratch2;
   Register exponent_reg = scratch3;
@@ -3412,8 +3437,10 @@ void MacroAssembler::StoreNumberToDoubleElements(Register value_reg,
   bind(&have_double_value);
   sll(scratch1, key_reg, kDoubleSizeLog2 - kSmiTagSize);
   Addu(scratch1, scratch1, elements_reg);
-  sw(mantissa_reg, FieldMemOperand(scratch1, FixedDoubleArray::kHeaderSize));
-  uint32_t offset = FixedDoubleArray::kHeaderSize + sizeof(kHoleNanLower32);
+  sw(mantissa_reg, FieldMemOperand(
+     scratch1, FixedDoubleArray::kHeaderSize - elements_offset));
+  uint32_t offset = FixedDoubleArray::kHeaderSize - elements_offset +
+      sizeof(kHoleNanLower32);
   sw(exponent_reg, FieldMemOperand(scratch1, offset));
   jmp(&done);
 
@@ -3433,7 +3460,8 @@ void MacroAssembler::StoreNumberToDoubleElements(Register value_reg,
 
   bind(&smi_value);
   Addu(scratch1, elements_reg,
-      Operand(FixedDoubleArray::kHeaderSize - kHeapObjectTag));
+      Operand(FixedDoubleArray::kHeaderSize - kHeapObjectTag -
+              elements_offset));
   sll(scratch2, key_reg, kDoubleSizeLog2 - kSmiTagSize);
   Addu(scratch1, scratch1, scratch2);
   // scratch1 is now effective address of the double element
@@ -3445,7 +3473,7 @@ void MacroAssembler::StoreNumberToDoubleElements(Register value_reg,
     destination = FloatingPointHelper::kCoreRegisters;
   }
 
-  Register untagged_value = receiver_reg;
+  Register untagged_value = elements_reg;
   SmiUntag(untagged_value, value_reg);
   FloatingPointHelper::ConvertIntToDouble(this,
                                           untagged_value,
@@ -3948,6 +3976,14 @@ void MacroAssembler::CallApiFunctionAndReturn(ExternalReference function,
   Addu(s2, s2, Operand(1));
   sw(s2, MemOperand(s3, kLevelOffset));
 
+  if (FLAG_log_timer_events) {
+    FrameScope frame(this, StackFrame::MANUAL);
+    PushSafepointRegisters();
+    PrepareCallCFunction(0, a0);
+    CallCFunction(ExternalReference::log_enter_external_function(isolate()), 0);
+    PopSafepointRegisters();
+  }
+
   // The O32 ABI requires us to pass a pointer in a0 where the returned struct
   // (4 bytes) will be placed. This is also built into the Simulator.
   // Set up the pointer to the returned value (a0). It was allocated in
@@ -3960,6 +3996,14 @@ void MacroAssembler::CallApiFunctionAndReturn(ExternalReference function,
   DirectCEntryStub stub;
   stub.GenerateCall(this, function);
 
+  if (FLAG_log_timer_events) {
+    FrameScope frame(this, StackFrame::MANUAL);
+    PushSafepointRegisters();
+    PrepareCallCFunction(0, a0);
+    CallCFunction(ExternalReference::log_leave_external_function(isolate()), 0);
+    PopSafepointRegisters();
+  }
+
   // As mentioned above, on MIPS a pointer is returned - we need to dereference
   // it to get the actual return value (which is also a pointer).
   lw(v0, MemOperand(v0));
@@ -4798,38 +4842,46 @@ void MacroAssembler::JumpIfEitherSmi(Register reg1,
 }
 
 
-void MacroAssembler::AbortIfSmi(Register object) {
-  STATIC_ASSERT(kSmiTag == 0);
-  andi(at, object, kSmiTagMask);
-  Assert(ne, "Operand is a smi", at, Operand(zero_reg));
+void MacroAssembler::AssertNotSmi(Register object) {
+  if (emit_debug_code()) {
+    STATIC_ASSERT(kSmiTag == 0);
+    andi(at, object, kSmiTagMask);
+    Check(ne, "Operand is a smi", at, Operand(zero_reg));
+  }
 }
 
 
-void MacroAssembler::AbortIfNotSmi(Register object) {
-  STATIC_ASSERT(kSmiTag == 0);
-  andi(at, object, kSmiTagMask);
-  Assert(eq, "Operand is a smi", at, Operand(zero_reg));
+void MacroAssembler::AssertSmi(Register object) {
+  if (emit_debug_code()) {
+    STATIC_ASSERT(kSmiTag == 0);
+    andi(at, object, kSmiTagMask);
+    Check(eq, "Operand is a smi", at, Operand(zero_reg));
+  }
 }
 
 
-void MacroAssembler::AbortIfNotString(Register object) {
-  STATIC_ASSERT(kSmiTag == 0);
-  And(t0, object, Operand(kSmiTagMask));
-  Assert(ne, "Operand is not a string", t0, Operand(zero_reg));
-  push(object);
-  lw(object, FieldMemOperand(object, HeapObject::kMapOffset));
-  lbu(object, FieldMemOperand(object, Map::kInstanceTypeOffset));
-  Assert(lo, "Operand is not a string", object, Operand(FIRST_NONSTRING_TYPE));
-  pop(object);
+void MacroAssembler::AssertString(Register object) {
+  if (emit_debug_code()) {
+    STATIC_ASSERT(kSmiTag == 0);
+    And(t0, object, Operand(kSmiTagMask));
+    Check(ne, "Operand is a smi and not a string", t0, Operand(zero_reg));
+    push(object);
+    lw(object, FieldMemOperand(object, HeapObject::kMapOffset));
+    lbu(object, FieldMemOperand(object, Map::kInstanceTypeOffset));
+    Check(lo, "Operand is not a string", object, Operand(FIRST_NONSTRING_TYPE));
+    pop(object);
+  }
 }
 
 
-void MacroAssembler::AbortIfNotRootValue(Register src,
-                                         Heap::RootListIndex root_value_index,
-                                         const char* message) {
-  ASSERT(!src.is(at));
-  LoadRoot(at, root_value_index);
-  Assert(eq, message, src, Operand(at));
+void MacroAssembler::AssertRootValue(Register src,
+                                     Heap::RootListIndex root_value_index,
+                                     const char* message) {
+  if (emit_debug_code()) {
+    ASSERT(!src.is(at));
+    LoadRoot(at, root_value_index);
+    Check(eq, message, src, Operand(at));
+  }
 }
 
 
@@ -4888,8 +4940,10 @@ void MacroAssembler::JumpIfBothInstanceTypesAreNotSequentialAscii(
     Register scratch2,
     Label* failure) {
   int kFlatAsciiStringMask =
-      kIsNotStringMask | kStringEncodingMask | kStringRepresentationMask;
+      kIsNotStringMask | kStringEncodingMask | kAsciiDataHintMask |
+      kStringRepresentationMask;
   int kFlatAsciiStringTag = ASCII_STRING_TYPE;
+  ASSERT_EQ(ASCII_STRING_TYPE, ASCII_STRING_TYPE & kFlatAsciiStringMask);
   ASSERT(kFlatAsciiStringTag <= 0xffff);  // Ensure this fits 16-bit immed.
   andi(scratch1, first, kFlatAsciiStringMask);
   Branch(failure, ne, scratch1, Operand(kFlatAsciiStringTag));
@@ -4902,8 +4956,10 @@ void MacroAssembler::JumpIfInstanceTypeIsNotSequentialAscii(Register type,
                                                             Register scratch,
                                                             Label* failure) {
   int kFlatAsciiStringMask =
-      kIsNotStringMask | kStringEncodingMask | kStringRepresentationMask;
+      kIsNotStringMask | kStringEncodingMask | kAsciiDataHintMask |
+      kStringRepresentationMask;
   int kFlatAsciiStringTag = ASCII_STRING_TYPE;
+  ASSERT_EQ(ASCII_STRING_TYPE, ASCII_STRING_TYPE & kFlatAsciiStringMask);
   And(scratch, type, Operand(kFlatAsciiStringMask));
   Branch(failure, ne, scratch, Operand(kFlatAsciiStringTag));
 }
@@ -5264,7 +5320,7 @@ void MacroAssembler::EnsureNotWhite(
   // For ASCII (char-size of 1) we shift the smi tag away to get the length.
   // For UC16 (char-size of 2) we just leave the smi tag in place, thereby
   // getting the length multiplied by 2.
-  ASSERT(kAsciiStringTag == 4 && kStringEncodingMask == 4);
+  ASSERT(kOneByteStringTag == 4 && kStringEncodingMask == 4);
   ASSERT(kSmiTag == 0 && kSmiTagSize == 1);
   lw(t9, FieldMemOperand(value, String::kLengthOffset));
   And(t8, instance_type, Operand(kStringEncodingMask));
@@ -5294,22 +5350,14 @@ void MacroAssembler::EnsureNotWhite(
 
 
 void MacroAssembler::LoadInstanceDescriptors(Register map,
-                                             Register descriptors,
-                                             Register scratch) {
-  Register temp = descriptors;
-  lw(temp, FieldMemOperand(map, Map::kTransitionsOrBackPointerOffset));
-
-  Label ok, fail;
-  CheckMap(temp,
-           scratch,
-           isolate()->factory()->fixed_array_map(),
-           &fail,
-           DONT_DO_SMI_CHECK);
-  lw(descriptors, FieldMemOperand(temp, TransitionArray::kDescriptorsOffset));
-  jmp(&ok);
-  bind(&fail);
-  LoadRoot(descriptors, Heap::kEmptyDescriptorArrayRootIndex);
-  bind(&ok);
+                                             Register descriptors) {
+  lw(descriptors, FieldMemOperand(map, Map::kDescriptorsOffset));
+}
+
+
+void MacroAssembler::NumberOfOwnDescriptors(Register dst, Register map) {
+  lw(dst, FieldMemOperand(map, Map::kBitField3Offset));
+  DecodeField<Map::NumberOfOwnDescriptorsBits>(dst);
 }
 
 
diff --git a/deps/v8/src/mips/macro-assembler-mips.h b/deps/v8/src/mips/macro-assembler-mips.h
index 2a77d6ce23..474772e0be 100644
--- a/deps/v8/src/mips/macro-assembler-mips.h
+++ b/deps/v8/src/mips/macro-assembler-mips.h
@@ -65,6 +65,14 @@ enum AllocationFlags {
   SIZE_IN_WORDS = 1 << 2
 };
 
+// Flags used for AllocateHeapNumber
+enum TaggingMode {
+  // Tag the result.
+  TAG_RESULT,
+  // Don't tag
+  DONT_TAG_RESULT
+};
+
 // Flags used for the ObjectToDoubleFPURegister function.
 enum ObjectToDoubleFlags {
   // No special flags.
@@ -536,7 +544,8 @@ class MacroAssembler: public Assembler {
                           Register scratch1,
                           Register scratch2,
                           Register heap_number_map,
-                          Label* gc_required);
+                          Label* gc_required,
+                          TaggingMode tagging_mode = TAG_RESULT);
   void AllocateHeapNumberWithValue(Register result,
                                    FPURegister value,
                                    Register scratch1,
@@ -620,6 +629,7 @@ class MacroAssembler: public Assembler {
 
   // Push a handle.
   void Push(Handle<Object> handle);
+  void Push(Smi* smi) { Push(Handle<Smi>(smi)); }
 
   // Push two registers. Pushes leftmost register first (to highest address).
   void Push(Register src1, Register src2) {
@@ -752,14 +762,16 @@ class MacroAssembler: public Assembler {
                       FPURegister double_scratch,
                       Label *not_int32);
 
-  // Truncates a double using a specific rounding mode.
+  // Truncates a double using a specific rounding mode, and writes the value
+  // to the result register.
   // The except_flag will contain any exceptions caused by the instruction.
-  // If check_inexact is kDontCheckForInexactConversion, then the inexacat
+  // If check_inexact is kDontCheckForInexactConversion, then the inexact
   // exception is masked.
   void EmitFPUTruncate(FPURoundingMode rounding_mode,
-                       FPURegister result,
+                       Register result,
                        DoubleRegister double_input,
-                       Register scratch1,
+                       Register scratch,
+                       DoubleRegister double_scratch,
                        Register except_flag,
                        CheckForInexactConversion check_inexact
                            = kDontCheckForInexactConversion);
@@ -972,13 +984,14 @@ class MacroAssembler: public Assembler {
   // case scratch2, scratch3 and scratch4 are unmodified.
   void StoreNumberToDoubleElements(Register value_reg,
                                    Register key_reg,
-                                   Register receiver_reg,
+                                   // All regs below here overwritten.
                                    Register elements_reg,
                                    Register scratch1,
                                    Register scratch2,
                                    Register scratch3,
                                    Register scratch4,
-                                   Label* fail);
+                                   Label* fail,
+                                   int elements_offset = 0);
 
   // Compare an object's map with the specified map and its transitioned
   // elements maps if mode is ALLOW_ELEMENT_TRANSITION_MAPS. Jumps to
@@ -1335,17 +1348,18 @@ class MacroAssembler: public Assembler {
   // Jump if either of the registers contain a smi.
   void JumpIfEitherSmi(Register reg1, Register reg2, Label* on_either_smi);
 
-  // Abort execution if argument is a smi. Used in debug code.
-  void AbortIfSmi(Register object);
-  void AbortIfNotSmi(Register object);
+  // Abort execution if argument is a smi, enabled via --debug-code.
+  void AssertNotSmi(Register object);
+  void AssertSmi(Register object);
 
-  // Abort execution if argument is a string. Used in debug code.
-  void AbortIfNotString(Register object);
+  // Abort execution if argument is not a string, enabled via --debug-code.
+  void AssertString(Register object);
 
-  // Abort execution if argument is not the root value with the given index.
-  void AbortIfNotRootValue(Register src,
-                           Heap::RootListIndex root_value_index,
-                           const char* message);
+  // Abort execution if argument is not the root value with the given index,
+  // enabled via --debug-code.
+  void AssertRootValue(Register src,
+                       Heap::RootListIndex root_value_index,
+                       const char* message);
 
   // ---------------------------------------------------------------------------
   // HeapNumber utilities.
@@ -1396,11 +1410,17 @@ class MacroAssembler: public Assembler {
                           DoubleRegister temp_double_reg);
 
 
-  void LoadInstanceDescriptors(Register map,
-                               Register descriptors,
-                               Register scratch);
+  void LoadInstanceDescriptors(Register map, Register descriptors);
   void EnumLength(Register dst, Register map);
-
+  void NumberOfOwnDescriptors(Register dst, Register map);
+
+  template<typename Field>
+  void DecodeField(Register reg) {
+    static const int shift = Field::kShift;
+    static const int mask = (Field::kMask >> shift) << kSmiTagSize;
+    srl(reg, reg, shift);
+    And(reg, reg, Operand(mask));
+  }
 
   // Activation support.
   void EnterFrame(StackFrame::Type type);
diff --git a/deps/v8/src/mips/regexp-macro-assembler-mips.cc b/deps/v8/src/mips/regexp-macro-assembler-mips.cc
index 21d1ce11b5..0dd72de339 100644
--- a/deps/v8/src/mips/regexp-macro-assembler-mips.cc
+++ b/deps/v8/src/mips/regexp-macro-assembler-mips.cc
@@ -1103,6 +1103,11 @@ void RegExpMacroAssemblerMIPS::WriteStackPointerToRegister(int reg) {
 }
 
 
+bool RegExpMacroAssemblerMIPS::CanReadUnaligned() {
+  return false;
+}
+
+
 // Private methods:
 
 void RegExpMacroAssemblerMIPS::CallCheckStackGuardState(Register scratch) {
@@ -1150,7 +1155,7 @@ int RegExpMacroAssemblerMIPS::CheckStackGuardState(Address* return_address,
 
   Handle<String> subject(frame_entry<String*>(re_frame, kInputString));
   // Current string.
-  bool is_ascii = subject->IsAsciiRepresentationUnderneath();
+  bool is_ascii = subject->IsOneByteRepresentationUnderneath();
 
   ASSERT(re_code->instruction_start() <= *return_address);
   ASSERT(*return_address <=
@@ -1181,7 +1186,7 @@ int RegExpMacroAssemblerMIPS::CheckStackGuardState(Address* return_address,
   }
 
   // String might have changed.
-  if (subject_tmp->IsAsciiRepresentation() != is_ascii) {
+  if (subject_tmp->IsOneByteRepresentation() != is_ascii) {
     // If we changed between an ASCII and an UC16 string, the specialized
     // code cannot be used, and we need to restart regexp matching from
     // scratch (including, potentially, compiling a new version of the code).
diff --git a/deps/v8/src/mips/regexp-macro-assembler-mips.h b/deps/v8/src/mips/regexp-macro-assembler-mips.h
index 5446f52439..8dd52a4847 100644
--- a/deps/v8/src/mips/regexp-macro-assembler-mips.h
+++ b/deps/v8/src/mips/regexp-macro-assembler-mips.h
@@ -112,6 +112,7 @@ class RegExpMacroAssemblerMIPS: public NativeRegExpMacroAssembler {
   virtual void WriteCurrentPositionToRegister(int reg, int cp_offset);
   virtual void ClearRegisters(int reg_from, int reg_to);
   virtual void WriteStackPointerToRegister(int reg);
+  virtual bool CanReadUnaligned();
 
   // Called from RegExp if the stack-guard is triggered.
   // If the code object is relocated, the return address is fixed before
diff --git a/deps/v8/src/mips/simulator-mips.cc b/deps/v8/src/mips/simulator-mips.cc
index cf87f93602..ea359eadea 100644
--- a/deps/v8/src/mips/simulator-mips.cc
+++ b/deps/v8/src/mips/simulator-mips.cc
@@ -1016,6 +1016,13 @@ void Simulator::set_register(int reg, int32_t value) {
 }
 
 
+void Simulator::set_dw_register(int reg, const int* dbl) {
+  ASSERT((reg >= 0) && (reg < kNumSimuRegisters));
+  registers_[reg] = dbl[0];
+  registers_[reg + 1] = dbl[1];
+}
+
+
 void Simulator::set_fpu_register(int fpureg, int32_t value) {
   ASSERT((fpureg >= 0) && (fpureg < kNumFPURegisters));
   FPUregisters_[fpureg] = value;
@@ -1045,6 +1052,19 @@ int32_t Simulator::get_register(int reg) const {
 }
 
 
+double Simulator::get_double_from_register_pair(int reg) {
+  ASSERT((reg >= 0) && (reg < kNumSimuRegisters) && ((reg % 2) == 0));
+
+  double dm_val = 0.0;
+  // Read the bits from the unsigned integer register_[] array
+  // into the double precision floating point value and return it.
+  char buffer[2 * sizeof(registers_[0])];
+  memcpy(buffer, &registers_[reg], 2 * sizeof(registers_[0]));
+  memcpy(&dm_val, buffer, 2 * sizeof(registers_[0]));
+  return(dm_val);
+}
+
+
 int32_t Simulator::get_fpu_register(int fpureg) const {
   ASSERT((fpureg >= 0) && (fpureg < kNumFPURegisters));
   return FPUregisters_[fpureg];
@@ -2219,10 +2239,10 @@ void Simulator::DecodeTypeRegister(Instruction* instr) {
           set_register(HI, static_cast<int32_t>(u64hilo >> 32));
           break;
         case DIV:
-          // Divide by zero was not checked in the configuration step - div and
-          // divu do not raise exceptions. On division by 0, the result will
-          // be UNPREDICTABLE.
-          if (rt != 0) {
+          // Divide by zero and overflow was not checked in the configuration
+          // step - div and divu do not raise exceptions. On division by 0 and
+          // on overflow (INT_MIN/-1), the result will be UNPREDICTABLE.
+          if (rt != 0 && !(rs == INT_MIN && rt == -1)) {
             set_register(LO, rs / rt);
             set_register(HI, rs % rt);
           }
@@ -2718,34 +2738,7 @@ void Simulator::Execute() {
 }
 
 
-int32_t Simulator::Call(byte* entry, int argument_count, ...) {
-  va_list parameters;
-  va_start(parameters, argument_count);
-  // Set up arguments.
-
-  // First four arguments passed in registers.
-  ASSERT(argument_count >= 4);
-  set_register(a0, va_arg(parameters, int32_t));
-  set_register(a1, va_arg(parameters, int32_t));
-  set_register(a2, va_arg(parameters, int32_t));
-  set_register(a3, va_arg(parameters, int32_t));
-
-  // Remaining arguments passed on stack.
-  int original_stack = get_register(sp);
-  // Compute position of stack on entry to generated code.
-  int entry_stack = (original_stack - (argument_count - 4) * sizeof(int32_t)
-                                    - kCArgsSlotsSize);
-  if (OS::ActivationFrameAlignment() != 0) {
-    entry_stack &= -OS::ActivationFrameAlignment();
-  }
-  // Store remaining arguments on stack, from low to high memory.
-  intptr_t* stack_argument = reinterpret_cast<intptr_t*>(entry_stack);
-  for (int i = 4; i < argument_count; i++) {
-    stack_argument[i - 4 + kCArgSlotCount] = va_arg(parameters, int32_t);
-  }
-  va_end(parameters);
-  set_register(sp, entry_stack);
-
+void Simulator::CallInternal(byte* entry) {
   // Prepare to execute the code at entry.
   set_register(pc, reinterpret_cast<int32_t>(entry));
   // Put down marker for end of simulation. The simulator will stop simulation
@@ -2809,6 +2802,38 @@ int32_t Simulator::Call(byte* entry, int argument_count, ...) {
   set_register(gp, gp_val);
   set_register(sp, sp_val);
   set_register(fp, fp_val);
+}
+
+
+int32_t Simulator::Call(byte* entry, int argument_count, ...) {
+  va_list parameters;
+  va_start(parameters, argument_count);
+  // Set up arguments.
+
+  // First four arguments passed in registers.
+  ASSERT(argument_count >= 4);
+  set_register(a0, va_arg(parameters, int32_t));
+  set_register(a1, va_arg(parameters, int32_t));
+  set_register(a2, va_arg(parameters, int32_t));
+  set_register(a3, va_arg(parameters, int32_t));
+
+  // Remaining arguments passed on stack.
+  int original_stack = get_register(sp);
+  // Compute position of stack on entry to generated code.
+  int entry_stack = (original_stack - (argument_count - 4) * sizeof(int32_t)
+                                    - kCArgsSlotsSize);
+  if (OS::ActivationFrameAlignment() != 0) {
+    entry_stack &= -OS::ActivationFrameAlignment();
+  }
+  // Store remaining arguments on stack, from low to high memory.
+  intptr_t* stack_argument = reinterpret_cast<intptr_t*>(entry_stack);
+  for (int i = 4; i < argument_count; i++) {
+    stack_argument[i - 4 + kCArgSlotCount] = va_arg(parameters, int32_t);
+  }
+  va_end(parameters);
+  set_register(sp, entry_stack);
+
+  CallInternal(entry);
 
   // Pop stack passed arguments.
   CHECK_EQ(entry_stack, get_register(sp));
@@ -2819,6 +2844,27 @@ int32_t Simulator::Call(byte* entry, int argument_count, ...) {
 }
 
 
+double Simulator::CallFP(byte* entry, double d0, double d1) {
+  if (!IsMipsSoftFloatABI) {
+    set_fpu_register_double(f12, d0);
+    set_fpu_register_double(f14, d1);
+  } else {
+    int buffer[2];
+    ASSERT(sizeof(buffer[0]) * 2 == sizeof(d0));
+    memcpy(buffer, &d0, sizeof(d0));
+    set_dw_register(a0, buffer);
+    memcpy(buffer, &d1, sizeof(d1));
+    set_dw_register(a2, buffer);
+  }
+  CallInternal(entry);
+  if (!IsMipsSoftFloatABI) {
+    return get_fpu_register_double(f0);
+  } else {
+    return get_double_from_register_pair(v0);
+  }
+}
+
+
 uintptr_t Simulator::PushAddress(uintptr_t address) {
   int new_sp = get_register(sp) - sizeof(uintptr_t);
   uintptr_t* stack_slot = reinterpret_cast<uintptr_t*>(new_sp);
diff --git a/deps/v8/src/mips/simulator-mips.h b/deps/v8/src/mips/simulator-mips.h
index 776badc29b..67f595302b 100644
--- a/deps/v8/src/mips/simulator-mips.h
+++ b/deps/v8/src/mips/simulator-mips.h
@@ -184,7 +184,9 @@ class Simulator {
   // architecture specification and is off by a 8 from the currently executing
   // instruction.
   void set_register(int reg, int32_t value);
+  void set_dw_register(int dreg, const int* dbl);
   int32_t get_register(int reg) const;
+  double get_double_from_register_pair(int reg);
   // Same for FPURegisters.
   void set_fpu_register(int fpureg, int32_t value);
   void set_fpu_register_float(int fpureg, float value);
@@ -214,6 +216,8 @@ class Simulator {
   // generated RegExp code with 7 parameters. This is a convenience function,
   // which sets up the simulator state and grabs the result on return.
   int32_t Call(byte* entry, int argument_count, ...);
+  // Alternative: call a 2-argument double function.
+  double CallFP(byte* entry, double d0, double d1);
 
   // Push an address onto the JS stack.
   uintptr_t PushAddress(uintptr_t address);
@@ -353,6 +357,7 @@ class Simulator {
   void GetFpArgs(double* x, int32_t* y);
   void SetFpResult(const double& result);
 
+  void CallInternal(byte* entry);
 
   // Architecture state.
   // Registers.
diff --git a/deps/v8/src/mips/stub-cache-mips.cc b/deps/v8/src/mips/stub-cache-mips.cc
index 391f8e072b..323933b5de 100644
--- a/deps/v8/src/mips/stub-cache-mips.cc
+++ b/deps/v8/src/mips/stub-cache-mips.cc
@@ -314,18 +314,23 @@ void StubCompiler::GenerateFastPropertyLoad(MacroAssembler* masm,
                                             Register dst,
                                             Register src,
                                             Handle<JSObject> holder,
-                                            int index) {
-  // Adjust for the number of properties stored in the holder.
-  index -= holder->map()->inobject_properties();
-  if (index < 0) {
-    // Get the property straight out of the holder.
-    int offset = holder->map()->instance_size() + (index * kPointerSize);
+                                            PropertyIndex index) {
+  if (index.is_header_index()) {
+    int offset = index.header_index() * kPointerSize;
     __ lw(dst, FieldMemOperand(src, offset));
   } else {
-    // Calculate the offset into the properties array.
-    int offset = index * kPointerSize + FixedArray::kHeaderSize;
-    __ lw(dst, FieldMemOperand(src, JSObject::kPropertiesOffset));
-    __ lw(dst, FieldMemOperand(dst, offset));
+    // Adjust for the number of properties stored in the holder.
+    int slot = index.field_index() - holder->map()->inobject_properties();
+    if (slot < 0) {
+      // Get the property straight out of the holder.
+      int offset = holder->map()->instance_size() + (slot * kPointerSize);
+      __ lw(dst, FieldMemOperand(src, offset));
+    } else {
+      // Calculate the offset into the properties array.
+      int offset = slot * kPointerSize + FixedArray::kHeaderSize;
+      __ lw(dst, FieldMemOperand(src, JSObject::kPropertiesOffset));
+      __ lw(dst, FieldMemOperand(dst, offset));
+    }
   }
 }
 
@@ -1200,7 +1205,7 @@ void StubCompiler::GenerateLoadField(Handle<JSObject> object,
                                      Register scratch1,
                                      Register scratch2,
                                      Register scratch3,
-                                     int index,
+                                     PropertyIndex index,
                                      Handle<String> name,
                                      Label* miss) {
   // Check that the receiver isn't a smi.
@@ -1549,7 +1554,7 @@ void CallStubCompiler::GenerateMissBranch() {
 
 Handle<Code> CallStubCompiler::CompileCallField(Handle<JSObject> object,
                                                 Handle<JSObject> holder,
-                                                int index,
+                                                PropertyIndex index,
                                                 Handle<String> name) {
   // ----------- S t a t e -------------
   //  -- a2    : name
@@ -1623,7 +1628,7 @@ Handle<Code> CallStubCompiler::CompileArrayPushCall(
   } else {
     Label call_builtin;
     if (argc == 1) {  // Otherwise fall through to call the builtin.
-      Label attempt_to_grow_elements;
+      Label attempt_to_grow_elements, with_write_barrier, check_double;
 
       Register elements = t2;
       Register end_elements = t1;
@@ -1634,7 +1639,7 @@ Handle<Code> CallStubCompiler::CompileArrayPushCall(
       __ CheckMap(elements,
                   v0,
                   Heap::kFixedArrayMapRootIndex,
-                  &call_builtin,
+                  &check_double,
                   DONT_DO_SMI_CHECK);
 
       // Get the array's length into v0 and calculate new length.
@@ -1650,7 +1655,6 @@ Handle<Code> CallStubCompiler::CompileArrayPushCall(
       __ Branch(&attempt_to_grow_elements, gt, v0, Operand(t0));
 
       // Check if value is a smi.
-      Label with_write_barrier;
       __ lw(t0, MemOperand(sp, (argc - 1) * kPointerSize));
       __ JumpIfNotSmi(t0, &with_write_barrier);
 
@@ -1671,6 +1675,39 @@ Handle<Code> CallStubCompiler::CompileArrayPushCall(
       __ Drop(argc + 1);
       __ Ret();
 
+      __ bind(&check_double);
+
+      // Check that the elements are in fast mode and writable.
+      __ CheckMap(elements,
+                  a0,
+                  Heap::kFixedDoubleArrayMapRootIndex,
+                  &call_builtin,
+                  DONT_DO_SMI_CHECK);
+
+      // Get the array's length into r0 and calculate new length.
+      __ lw(a0, FieldMemOperand(receiver, JSArray::kLengthOffset));
+      STATIC_ASSERT(kSmiTagSize == 1);
+      STATIC_ASSERT(kSmiTag == 0);
+      __ Addu(a0, a0, Operand(Smi::FromInt(argc)));
+
+      // Get the elements' length.
+      __ lw(t0, FieldMemOperand(elements, FixedArray::kLengthOffset));
+
+      // Check if we could survive without allocation.
+      __ Branch(&call_builtin, gt, a0, Operand(t0));
+
+      __ lw(t0, MemOperand(sp, (argc - 1) * kPointerSize));
+      __ StoreNumberToDoubleElements(
+          t0, a0, elements, a3, t1, a2, t5,
+          &call_builtin, argc * kDoubleSize);
+
+      // Save new length.
+      __ sw(a0, FieldMemOperand(receiver, JSArray::kLengthOffset));
+
+      // Check for a smi.
+      __ Drop(argc + 1);
+      __ Ret();
+
       __ bind(&with_write_barrier);
 
       __ lw(a3, FieldMemOperand(receiver, HeapObject::kMapOffset));
@@ -1682,8 +1719,12 @@ Handle<Code> CallStubCompiler::CompileArrayPushCall(
         // In case of fast smi-only, convert to fast object, otherwise bail out.
         __ bind(&not_fast_object);
         __ CheckFastSmiElements(a3, t3, &call_builtin);
+
+        __ lw(t3, FieldMemOperand(t0, HeapObject::kMapOffset));
+        __ LoadRoot(at, Heap::kHeapNumberMapRootIndex);
+        __ Branch(&call_builtin, eq, t3, Operand(at));
         // edx: receiver
-        // r3: map
+        // a3: map
         Label try_holey_map;
         __ LoadTransitionedArrayMapConditional(FAST_SMI_ELEMENTS,
                                                FAST_ELEMENTS,
@@ -2915,7 +2956,7 @@ Handle<Code> LoadStubCompiler::CompileLoadNonexistent(Handle<String> name,
 
 Handle<Code> LoadStubCompiler::CompileLoadField(Handle<JSObject> object,
                                                 Handle<JSObject> holder,
-                                                int index,
+                                                PropertyIndex index,
                                                 Handle<String> name) {
   // ----------- S t a t e -------------
   //  -- a0    : receiver
@@ -3106,7 +3147,7 @@ Handle<Code> LoadStubCompiler::CompileLoadGlobal(
 Handle<Code> KeyedLoadStubCompiler::CompileLoadField(Handle<String> name,
                                                      Handle<JSObject> receiver,
                                                      Handle<JSObject> holder,
-                                                     int index) {
+                                                     PropertyIndex index) {
   // ----------- S t a t e -------------
   //  -- ra    : return address
   //  -- a0    : key
@@ -3453,7 +3494,7 @@ Handle<Code> ConstructStubCompiler::CompileConstructStub(
   // t7: undefined
   __ lbu(a3, FieldMemOperand(a2, Map::kInstanceTypeOffset));
   __ Check(ne, "Function constructed by construct stub.",
-      a3, Operand(JS_FUNCTION_TYPE));
+           a3, Operand(JS_FUNCTION_TYPE));
 #endif
 
   // Now allocate the JSObject in new space.
@@ -3461,7 +3502,13 @@ Handle<Code> ConstructStubCompiler::CompileConstructStub(
   // a1: constructor function
   // a2: initial map
   // t7: undefined
+  ASSERT(function->has_initial_map());
   __ lbu(a3, FieldMemOperand(a2, Map::kInstanceSizeOffset));
+#ifdef DEBUG
+  int instance_size = function->initial_map()->instance_size();
+  __ Check(eq, "Instance size of initial map changed.",
+           a3, Operand(instance_size >> kPointerSizeLog2));
+#endif
   __ AllocateInNewSpace(a3, t4, t5, t6, &generic_stub_call, SIZE_IN_WORDS);
 
   // Allocated the JSObject, now initialize the fields. Map is set to initial
@@ -3524,7 +3571,6 @@ Handle<Code> ConstructStubCompiler::CompileConstructStub(
   }
 
   // Fill the unused in-object property fields with undefined.
-  ASSERT(function->has_initial_map());
   for (int i = shared->this_property_assignments_count();
        i < function->initial_map()->inobject_properties();
        i++) {
@@ -3649,6 +3695,7 @@ static void GenerateSmiKeyCheck(MacroAssembler* masm,
                                 Register scratch0,
                                 Register scratch1,
                                 FPURegister double_scratch0,
+                                FPURegister double_scratch1,
                                 Label* fail) {
   if (CpuFeatures::IsSupported(FPU)) {
     CpuFeatures::Scope scope(FPU);
@@ -3664,15 +3711,15 @@ static void GenerateSmiKeyCheck(MacroAssembler* masm,
                 DONT_DO_SMI_CHECK);
     __ ldc1(double_scratch0, FieldMemOperand(key, HeapNumber::kValueOffset));
     __ EmitFPUTruncate(kRoundToZero,
-                       double_scratch0,
-                       double_scratch0,
                        scratch0,
+                       double_scratch0,
+                       at,
+                       double_scratch1,
                        scratch1,
                        kCheckForInexactConversion);
 
     __ Branch(fail, ne, scratch1, Operand(zero_reg));
 
-    __ mfc1(scratch0, double_scratch0);
     __ SmiTagCheckOverflow(key, scratch0, scratch1);
     __ BranchOnOverflow(fail, scratch1);
     __ bind(&key_ok);
@@ -3700,7 +3747,7 @@ void KeyedLoadStubCompiler::GenerateLoadExternalArray(
   // have been verified by the caller to not be a smi.
 
   // Check that the key is a smi or a heap number convertible to a smi.
-  GenerateSmiKeyCheck(masm, key, t0, t1, f2, &miss_force_generic);
+  GenerateSmiKeyCheck(masm, key, t0, t1, f2, f4, &miss_force_generic);
 
   __ lw(a3, FieldMemOperand(receiver, JSObject::kElementsOffset));
   // a3: elements array
@@ -3800,34 +3847,41 @@ void KeyedLoadStubCompiler::GenerateLoadExternalArray(
     __ Ret();
 
     __ bind(&box_int);
-    // Allocate a HeapNumber for the result and perform int-to-double
-    // conversion.
-    // The arm version uses a temporary here to save r0, but we don't need to
-    // (a0 is not modified).
-    __ LoadRoot(t1, Heap::kHeapNumberMapRootIndex);
-    __ AllocateHeapNumber(v0, a3, t0, t1, &slow);
 
     if (CpuFeatures::IsSupported(FPU)) {
       CpuFeatures::Scope scope(FPU);
+      // Allocate a HeapNumber for the result and perform int-to-double
+      // conversion.
+      // The arm version uses a temporary here to save r0, but we don't need to
+      // (a0 is not modified).
+      __ LoadRoot(t1, Heap::kHeapNumberMapRootIndex);
+      __ AllocateHeapNumber(v0, a3, t0, t1, &slow, DONT_TAG_RESULT);
       __ mtc1(value, f0);
       __ cvt_d_w(f0, f0);
-      __ sdc1(f0, FieldMemOperand(v0, HeapNumber::kValueOffset));
+      __ sdc1(f0, MemOperand(v0, HeapNumber::kValueOffset));
+      __ Addu(v0, v0, kHeapObjectTag);
       __ Ret();
     } else {
-      Register dst1 = t2;
-      Register dst2 = t3;
+      // Allocate a HeapNumber for the result and perform int-to-double
+      // conversion.
+      // The arm version uses a temporary here to save r0, but we don't need to
+      // (a0 is not modified).
+      __ LoadRoot(t1, Heap::kHeapNumberMapRootIndex);
+      __ AllocateHeapNumber(v0, a3, t0, t1, &slow, TAG_RESULT);
+      Register dst_mantissa = t2;
+      Register dst_exponent = t3;
       FloatingPointHelper::Destination dest =
           FloatingPointHelper::kCoreRegisters;
       FloatingPointHelper::ConvertIntToDouble(masm,
                                               value,
                                               dest,
                                               f0,
-                                              dst1,
-                                              dst2,
+                                              dst_mantissa,
+                                              dst_exponent,
                                               t1,
                                               f2);
-      __ sw(dst1, FieldMemOperand(v0, HeapNumber::kMantissaOffset));
-      __ sw(dst2, FieldMemOperand(v0, HeapNumber::kExponentOffset));
+      __ sw(dst_mantissa, FieldMemOperand(v0, HeapNumber::kMantissaOffset));
+      __ sw(dst_exponent, FieldMemOperand(v0, HeapNumber::kExponentOffset));
       __ Ret();
     }
   } else if (elements_kind == EXTERNAL_UNSIGNED_INT_ELEMENTS) {
@@ -3850,7 +3904,7 @@ void KeyedLoadStubCompiler::GenerateLoadExternalArray(
       // conversion. Don't use a0 and a1 as AllocateHeapNumber clobbers all
       // registers - also when jumping due to exhausted young space.
       __ LoadRoot(t6, Heap::kHeapNumberMapRootIndex);
-      __ AllocateHeapNumber(v0, t2, t3, t6, &slow);
+      __ AllocateHeapNumber(v0, t2, t3, t6, &slow, DONT_TAG_RESULT);
 
       // This is replaced by a macro:
       // __ mtc1(value, f0);     // LS 32-bits.
@@ -3859,8 +3913,9 @@ void KeyedLoadStubCompiler::GenerateLoadExternalArray(
 
       __ Cvt_d_uw(f0, value, f22);
 
-      __ sdc1(f0, FieldMemOperand(v0, HeapNumber::kValueOffset));
+      __ sdc1(f0, MemOperand(v0, HeapNumber::kValueOffset));
 
+      __ Addu(v0, v0, kHeapObjectTag);
       __ Ret();
     } else {
       // Check whether unsigned integer fits into smi.
@@ -3893,7 +3948,7 @@ void KeyedLoadStubCompiler::GenerateLoadExternalArray(
       // clobbers all registers - also when jumping due to exhausted young
       // space.
       __ LoadRoot(t6, Heap::kHeapNumberMapRootIndex);
-      __ AllocateHeapNumber(t2, t3, t5, t6, &slow);
+      __ AllocateHeapNumber(t2, t3, t5, t6, &slow, TAG_RESULT);
 
       __ sw(hiword, FieldMemOperand(t2, HeapNumber::kExponentOffset));
       __ sw(loword, FieldMemOperand(t2, HeapNumber::kMantissaOffset));
@@ -3910,17 +3965,19 @@ void KeyedLoadStubCompiler::GenerateLoadExternalArray(
       // AllocateHeapNumber clobbers all registers - also when jumping due to
       // exhausted young space.
       __ LoadRoot(t6, Heap::kHeapNumberMapRootIndex);
-      __ AllocateHeapNumber(v0, t3, t5, t6, &slow);
+      __ AllocateHeapNumber(v0, t3, t5, t6, &slow, DONT_TAG_RESULT);
       // The float (single) value is already in fpu reg f0 (if we use float).
       __ cvt_d_s(f0, f0);
-      __ sdc1(f0, FieldMemOperand(v0, HeapNumber::kValueOffset));
+      __ sdc1(f0, MemOperand(v0, HeapNumber::kValueOffset));
+
+      __ Addu(v0, v0, kHeapObjectTag);
       __ Ret();
     } else {
       // Allocate a HeapNumber for the result. Don't use a0 and a1 as
       // AllocateHeapNumber clobbers all registers - also when jumping due to
       // exhausted young space.
       __ LoadRoot(t6, Heap::kHeapNumberMapRootIndex);
-      __ AllocateHeapNumber(v0, t3, t5, t6, &slow);
+      __ AllocateHeapNumber(v0, t3, t5, t6, &slow, TAG_RESULT);
       // FPU is not available, do manual single to double conversion.
 
       // a2: floating point value (binary32).
@@ -3975,16 +4032,18 @@ void KeyedLoadStubCompiler::GenerateLoadExternalArray(
       // AllocateHeapNumber clobbers all registers - also when jumping due to
       // exhausted young space.
       __ LoadRoot(t6, Heap::kHeapNumberMapRootIndex);
-      __ AllocateHeapNumber(v0, t3, t5, t6, &slow);
+      __ AllocateHeapNumber(v0, t3, t5, t6, &slow, DONT_TAG_RESULT);
       // The double value is already in f0
-      __ sdc1(f0, FieldMemOperand(v0, HeapNumber::kValueOffset));
+      __ sdc1(f0, MemOperand(v0, HeapNumber::kValueOffset));
+
+      __ Addu(v0, v0, kHeapObjectTag);
       __ Ret();
     } else {
       // Allocate a HeapNumber for the result. Don't use a0 and a1 as
       // AllocateHeapNumber clobbers all registers - also when jumping due to
       // exhausted young space.
       __ LoadRoot(t6, Heap::kHeapNumberMapRootIndex);
-      __ AllocateHeapNumber(v0, t3, t5, t6, &slow);
+      __ AllocateHeapNumber(v0, t3, t5, t6, &slow, TAG_RESULT);
 
       __ sw(a2, FieldMemOperand(v0, HeapNumber::kMantissaOffset));
       __ sw(a3, FieldMemOperand(v0, HeapNumber::kExponentOffset));
@@ -4042,7 +4101,7 @@ void KeyedStoreStubCompiler::GenerateStoreExternalArray(
   // have been verified by the caller to not be a smi.
 
   // Check that the key is a smi or a heap number convertible to a smi.
-  GenerateSmiKeyCheck(masm, key, t0, t1, f2, &miss_force_generic);
+  GenerateSmiKeyCheck(masm, key, t0, t1, f2, f4, &miss_force_generic);
 
   __ lw(a3, FieldMemOperand(receiver, JSObject::kElementsOffset));
 
@@ -4121,7 +4180,7 @@ void KeyedStoreStubCompiler::GenerateStoreExternalArray(
       }
       FloatingPointHelper::ConvertIntToDouble(
           masm, t1, destination,
-          f0, t2, t3,  // These are: double_dst, dst1, dst2.
+          f0, t2, t3,  // These are: double_dst, dst_mantissa, dst_exponent.
           t0, f2);  // These are: scratch2, single_scratch.
       if (destination == FloatingPointHelper::kFPURegisters) {
         CpuFeatures::Scope scope(FPU);
@@ -4431,7 +4490,7 @@ void KeyedLoadStubCompiler::GenerateLoadFastElement(MacroAssembler* masm) {
   // have been verified by the caller to not be a smi.
 
   // Check that the key is a smi or a heap number convertible to a smi.
-  GenerateSmiKeyCheck(masm, a0, t0, t1, f2, &miss_force_generic);
+  GenerateSmiKeyCheck(masm, a0, t0, t1, f2, f4, &miss_force_generic);
 
   // Get the elements array.
   __ lw(a2, FieldMemOperand(a1, JSObject::kElementsOffset));
@@ -4482,7 +4541,7 @@ void KeyedLoadStubCompiler::GenerateLoadFastDoubleElement(
   // have been verified by the caller to not be a smi.
 
   // Check that the key is a smi or a heap number convertible to a smi.
-  GenerateSmiKeyCheck(masm, key_reg, t0, t1, f2, &miss_force_generic);
+  GenerateSmiKeyCheck(masm, key_reg, t0, t1, f2, f4, &miss_force_generic);
 
   // Get the elements array.
   __ lw(elements_reg,
@@ -4502,7 +4561,7 @@ void KeyedLoadStubCompiler::GenerateLoadFastDoubleElement(
   // Non-NaN. Allocate a new heap number and copy the double value into it.
   __ LoadRoot(heap_number_map, Heap::kHeapNumberMapRootIndex);
   __ AllocateHeapNumber(heap_number_reg, scratch2, scratch3,
-                        heap_number_map, &slow_allocate_heapnumber);
+                        heap_number_map, &slow_allocate_heapnumber, TAG_RESULT);
 
   // Don't need to reload the upper 32 bits of the double, it's already in
   // scratch.
@@ -4556,7 +4615,7 @@ void KeyedStoreStubCompiler::GenerateStoreFastElement(
   // have been verified by the caller to not be a smi.
 
   // Check that the key is a smi or a heap number convertible to a smi.
-  GenerateSmiKeyCheck(masm, key_reg, t0, t1, f2, &miss_force_generic);
+  GenerateSmiKeyCheck(masm, key_reg, t0, t1, f2, f4, &miss_force_generic);
 
   if (IsFastSmiElementsKind(elements_kind)) {
     __ JumpIfNotSmi(value_reg, &transition_elements_kind);
@@ -4700,11 +4759,12 @@ void KeyedStoreStubCompiler::GenerateStoreFastDoubleElement(
   //  -- a1    : key
   //  -- a2    : receiver
   //  -- ra    : return address
-  //  -- a3    : scratch
+  //  -- a3    : scratch (elements backing store)
   //  -- t0    : scratch (elements_reg)
   //  -- t1    : scratch (mantissa_reg)
   //  -- t2    : scratch (exponent_reg)
   //  -- t3    : scratch4
+  //  -- t4    : scratch
   // -----------------------------------
   Label miss_force_generic, transition_elements_kind, grow, slow;
   Label finish_store, check_capacity;
@@ -4717,13 +4777,14 @@ void KeyedStoreStubCompiler::GenerateStoreFastDoubleElement(
   Register scratch2 = t1;
   Register scratch3 = t2;
   Register scratch4 = t3;
+  Register scratch5 = t4;
   Register length_reg = t3;
 
   // This stub is meant to be tail-jumped to, the receiver must already
   // have been verified by the caller to not be a smi.
 
   // Check that the key is a smi or a heap number convertible to a smi.
-  GenerateSmiKeyCheck(masm, key_reg, t0, t1, f2, &miss_force_generic);
+  GenerateSmiKeyCheck(masm, key_reg, t0, t1, f2, f4, &miss_force_generic);
 
   __ lw(elements_reg,
          FieldMemOperand(receiver_reg, JSObject::kElementsOffset));
@@ -4747,7 +4808,7 @@ void KeyedStoreStubCompiler::GenerateStoreFastDoubleElement(
 
   __ StoreNumberToDoubleElements(value_reg,
                                  key_reg,
-                                 receiver_reg,
+                                 // All registers after this are overwritten.
                                  elements_reg,
                                  scratch1,
                                  scratch2,
@@ -4797,14 +4858,32 @@ void KeyedStoreStubCompiler::GenerateStoreFastDoubleElement(
     __ AllocateInNewSpace(size, elements_reg, scratch1, scratch2, &slow,
                           TAG_OBJECT);
 
-    // Initialize the new FixedDoubleArray. Leave elements unitialized for
-    // efficiency, they are guaranteed to be initialized before use.
+    // Initialize the new FixedDoubleArray.
     __ LoadRoot(scratch1, Heap::kFixedDoubleArrayMapRootIndex);
     __ sw(scratch1, FieldMemOperand(elements_reg, JSObject::kMapOffset));
     __ li(scratch1, Operand(Smi::FromInt(JSArray::kPreallocatedArrayElements)));
     __ sw(scratch1,
           FieldMemOperand(elements_reg, FixedDoubleArray::kLengthOffset));
 
+    __ mov(scratch1, elements_reg);
+    __ StoreNumberToDoubleElements(value_reg,
+                                   key_reg,
+                                   // All registers after this are overwritten.
+                                   scratch1,
+                                   scratch2,
+                                   scratch3,
+                                   scratch4,
+                                   scratch5,
+                                   &transition_elements_kind);
+
+    __ li(scratch1, Operand(kHoleNanLower32));
+    __ li(scratch2, Operand(kHoleNanUpper32));
+    for (int i = 1; i < JSArray::kPreallocatedArrayElements; i++) {
+      int offset = FixedDoubleArray::OffsetOfElementAt(i);
+      __ sw(scratch1, FieldMemOperand(elements_reg, offset));
+      __ sw(scratch2, FieldMemOperand(elements_reg, offset + kPointerSize));
+    }
+
     // Install the new backing store in the JSArray.
     __ sw(elements_reg,
           FieldMemOperand(receiver_reg, JSObject::kElementsOffset));
@@ -4817,7 +4896,7 @@ void KeyedStoreStubCompiler::GenerateStoreFastDoubleElement(
     __ sw(length_reg, FieldMemOperand(receiver_reg, JSArray::kLengthOffset));
     __ lw(elements_reg,
           FieldMemOperand(receiver_reg, JSObject::kElementsOffset));
-    __ jmp(&finish_store);
+    __ Ret();
 
     __ bind(&check_capacity);
     // Make sure that the backing store can hold additional elements.
diff --git a/deps/v8/src/mirror-debugger.js b/deps/v8/src/mirror-debugger.js
index a5331a014d..7f1a05aed9 100644
--- a/deps/v8/src/mirror-debugger.js
+++ b/deps/v8/src/mirror-debugger.js
@@ -1844,10 +1844,14 @@ function ScopeDetails(frame, fun, index) {
                                      frame.details_.frameId(),
                                      frame.details_.inlinedFrameIndex(),
                                      index);
+    this.frame_id_ = frame.details_.frameId();
+    this.inlined_frame_id_ = frame.details_.inlinedFrameIndex();
   } else {
     this.details_ = %GetFunctionScopeDetails(fun.value(), index);
+    this.fun_value_ = fun.value();
     this.break_id_ = undefined;
   }
+  this.index_ = index;
 }
 
 
@@ -1867,6 +1871,22 @@ ScopeDetails.prototype.object = function() {
 };
 
 
+ScopeDetails.prototype.setVariableValueImpl = function(name, new_value) {
+  var raw_res;
+  if (!IS_UNDEFINED(this.break_id_)) {
+    %CheckExecutionState(this.break_id_);
+    raw_res = %SetScopeVariableValue(this.break_id_, this.frame_id_,
+        this.inlined_frame_id_, this.index_, name, new_value);
+  } else {
+    raw_res = %SetScopeVariableValue(this.fun_value_, null, null, this.index_,
+        name, new_value);
+  }
+  if (!raw_res) {
+    throw new Error("Failed to set variable value");
+  }
+};
+
+
 /**
  * Mirror object for scope of frame or function. Either frame or function must
  * be specified.
@@ -1914,6 +1934,11 @@ ScopeMirror.prototype.scopeObject = function() {
 };
 
 
+ScopeMirror.prototype.setVariableValue = function(name, new_value) {
+  this.details_.setVariableValueImpl(name, new_value);
+};
+
+
 /**
  * Mirror object for script source.
  * @param {Script} script The script object
diff --git a/deps/v8/src/mksnapshot.cc b/deps/v8/src/mksnapshot.cc
index 275c8acc83..d7775517b7 100644
--- a/deps/v8/src/mksnapshot.cc
+++ b/deps/v8/src/mksnapshot.cc
@@ -166,30 +166,37 @@ class CppByteSink : public PartialSnapshotSink {
   }
 
   void WriteSpaceUsed(
+      const char* prefix,
       int new_space_used,
       int pointer_space_used,
       int data_space_used,
       int code_space_used,
       int map_space_used,
-      int cell_space_used,
-      int large_space_used) {
-    fprintf(fp_, "const int Snapshot::new_space_used_ = %d;\n", new_space_used);
+      int cell_space_used) {
     fprintf(fp_,
-            "const int Snapshot::pointer_space_used_ = %d;\n",
+            "const int Snapshot::%snew_space_used_ = %d;\n",
+            prefix,
+            new_space_used);
+    fprintf(fp_,
+            "const int Snapshot::%spointer_space_used_ = %d;\n",
+            prefix,
             pointer_space_used);
     fprintf(fp_,
-            "const int Snapshot::data_space_used_ = %d;\n",
+            "const int Snapshot::%sdata_space_used_ = %d;\n",
+            prefix,
             data_space_used);
     fprintf(fp_,
-            "const int Snapshot::code_space_used_ = %d;\n",
+            "const int Snapshot::%scode_space_used_ = %d;\n",
+            prefix,
             code_space_used);
-    fprintf(fp_, "const int Snapshot::map_space_used_ = %d;\n", map_space_used);
     fprintf(fp_,
-            "const int Snapshot::cell_space_used_ = %d;\n",
-            cell_space_used);
+            "const int Snapshot::%smap_space_used_ = %d;\n",
+            prefix,
+            map_space_used);
     fprintf(fp_,
-            "const int Snapshot::large_space_used_ = %d;\n",
-            large_space_used);
+            "const int Snapshot::%scell_space_used_ = %d;\n",
+            prefix,
+            cell_space_used);
   }
 
   void WritePartialSnapshot() {
@@ -400,12 +407,20 @@ int main(int argc, char** argv) {
   sink.WritePartialSnapshot();
 
   sink.WriteSpaceUsed(
+      "context_",
       partial_ser.CurrentAllocationAddress(i::NEW_SPACE),
       partial_ser.CurrentAllocationAddress(i::OLD_POINTER_SPACE),
       partial_ser.CurrentAllocationAddress(i::OLD_DATA_SPACE),
       partial_ser.CurrentAllocationAddress(i::CODE_SPACE),
       partial_ser.CurrentAllocationAddress(i::MAP_SPACE),
-      partial_ser.CurrentAllocationAddress(i::CELL_SPACE),
-      partial_ser.CurrentAllocationAddress(i::LO_SPACE));
+      partial_ser.CurrentAllocationAddress(i::CELL_SPACE));
+  sink.WriteSpaceUsed(
+      "",
+      ser.CurrentAllocationAddress(i::NEW_SPACE),
+      ser.CurrentAllocationAddress(i::OLD_POINTER_SPACE),
+      ser.CurrentAllocationAddress(i::OLD_DATA_SPACE),
+      ser.CurrentAllocationAddress(i::CODE_SPACE),
+      ser.CurrentAllocationAddress(i::MAP_SPACE),
+      ser.CurrentAllocationAddress(i::CELL_SPACE));
   return 0;
 }
diff --git a/deps/v8/src/object-observe.js b/deps/v8/src/object-observe.js
new file mode 100644
index 0000000000..8c2895f4bd
--- /dev/null
+++ b/deps/v8/src/object-observe.js
@@ -0,0 +1,242 @@
+// Copyright 2012 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+"use strict";
+
+var observationState = %GetObservationState();
+if (IS_UNDEFINED(observationState.observerInfoMap)) {
+  observationState.observerInfoMap = %CreateObjectHashTable();
+  observationState.objectInfoMap = %CreateObjectHashTable();
+  observationState.notifierTargetMap = %CreateObjectHashTable();
+  observationState.pendingObservers = new InternalArray;
+  observationState.observerPriority = 0;
+}
+
+function InternalObjectHashTable(tableName) {
+  this.tableName = tableName;
+}
+
+InternalObjectHashTable.prototype = {
+  get: function(key) {
+    return %ObjectHashTableGet(observationState[this.tableName], key);
+  },
+  set: function(key, value) {
+    observationState[this.tableName] =
+        %ObjectHashTableSet(observationState[this.tableName], key, value);
+  },
+  has: function(key) {
+    return !IS_UNDEFINED(this.get(key));
+  }
+};
+
+var observerInfoMap = new InternalObjectHashTable('observerInfoMap');
+var objectInfoMap = new InternalObjectHashTable('objectInfoMap');
+var notifierTargetMap = new InternalObjectHashTable('notifierTargetMap');
+
+function CreateObjectInfo(object) {
+  var info = {
+    changeObservers: new InternalArray,
+    notifier: null,
+  };
+  objectInfoMap.set(object, info);
+  return info;
+}
+
+function ObjectObserve(object, callback) {
+  if (!IS_SPEC_OBJECT(object))
+    throw MakeTypeError("observe_non_object", ["observe"]);
+  if (!IS_SPEC_FUNCTION(callback))
+    throw MakeTypeError("observe_non_function", ["observe"]);
+  if (ObjectIsFrozen(callback))
+    throw MakeTypeError("observe_callback_frozen");
+
+  if (!observerInfoMap.has(callback)) {
+    observerInfoMap.set(callback, {
+      pendingChangeRecords: null,
+      priority: observationState.observerPriority++,
+    });
+  }
+
+  var objectInfo = objectInfoMap.get(object);
+  if (IS_UNDEFINED(objectInfo)) {
+    objectInfo = CreateObjectInfo(object);
+    %SetIsObserved(object, true);
+  }
+
+  var changeObservers = objectInfo.changeObservers;
+  if (changeObservers.indexOf(callback) < 0)
+    changeObservers.push(callback);
+
+  return object;
+}
+
+function ObjectUnobserve(object, callback) {
+  if (!IS_SPEC_OBJECT(object))
+    throw MakeTypeError("observe_non_object", ["unobserve"]);
+  if (!IS_SPEC_FUNCTION(callback))
+    throw MakeTypeError("observe_non_function", ["unobserve"]);
+
+  var objectInfo = objectInfoMap.get(object);
+  if (IS_UNDEFINED(objectInfo))
+    return object;
+
+  var changeObservers = objectInfo.changeObservers;
+  var index = changeObservers.indexOf(callback);
+  if (index >= 0)
+    changeObservers.splice(index, 1);
+
+  return object;
+}
+
+function EnqueueChangeRecord(changeRecord, observers) {
+  for (var i = 0; i < observers.length; i++) {
+    var observer = observers[i];
+    var observerInfo = observerInfoMap.get(observer);
+    observationState.pendingObservers[observerInfo.priority] = observer;
+    %SetObserverDeliveryPending();
+    if (IS_NULL(observerInfo.pendingChangeRecords)) {
+      observerInfo.pendingChangeRecords = new InternalArray(changeRecord);
+    } else {
+      observerInfo.pendingChangeRecords.push(changeRecord);
+    }
+  }
+}
+
+function NotifyChange(type, object, name, oldValue) {
+  var objectInfo = objectInfoMap.get(object);
+  var changeRecord = (arguments.length < 4) ?
+      { type: type, object: object, name: name } :
+      { type: type, object: object, name: name, oldValue: oldValue };
+  ObjectFreeze(changeRecord);
+  EnqueueChangeRecord(changeRecord, objectInfo.changeObservers);
+}
+
+var notifierPrototype = {};
+
+function ObjectNotifierNotify(changeRecord) {
+  if (!IS_SPEC_OBJECT(this))
+    throw MakeTypeError("called_on_non_object", ["notify"]);
+
+  var target = notifierTargetMap.get(this);
+  if (IS_UNDEFINED(target))
+    throw MakeTypeError("observe_notify_non_notifier");
+
+  if (!IS_STRING(changeRecord.type))
+    throw MakeTypeError("observe_type_non_string");
+
+  var objectInfo = objectInfoMap.get(target);
+  if (IS_UNDEFINED(objectInfo))
+    return;
+
+  if (!objectInfo.changeObservers.length)
+    return;
+
+  var newRecord = {
+    object: target
+  };
+  for (var prop in changeRecord) {
+    if (prop === 'object')
+      continue;
+
+    %DefineOrRedefineDataProperty(newRecord, prop, changeRecord[prop],
+        READ_ONLY + DONT_DELETE);
+  }
+  ObjectFreeze(newRecord);
+
+  EnqueueChangeRecord(newRecord, objectInfo.changeObservers);
+}
+
+function ObjectGetNotifier(object) {
+  if (!IS_SPEC_OBJECT(object))
+    throw MakeTypeError("observe_non_object", ["getNotifier"]);
+
+  if (ObjectIsFrozen(object))
+    return null;
+
+  var objectInfo = objectInfoMap.get(object);
+  if (IS_UNDEFINED(objectInfo))
+    objectInfo = CreateObjectInfo(object);
+
+  if (IS_NULL(objectInfo.notifier)) {
+    objectInfo.notifier = {
+      __proto__: notifierPrototype
+    };
+    notifierTargetMap.set(objectInfo.notifier, object);
+  }
+
+  return objectInfo.notifier;
+}
+
+function DeliverChangeRecordsForObserver(observer) {
+  var observerInfo = observerInfoMap.get(observer);
+  if (IS_UNDEFINED(observerInfo))
+    return;
+
+  var pendingChangeRecords = observerInfo.pendingChangeRecords;
+  if (IS_NULL(pendingChangeRecords))
+    return;
+
+  observerInfo.pendingChangeRecords = null;
+  delete observationState.pendingObservers[observerInfo.priority];
+  var delivered = [];
+  %MoveArrayContents(pendingChangeRecords, delivered);
+  try {
+    %Call(void 0, delivered, observer);
+  } catch (ex) {}
+}
+
+function ObjectDeliverChangeRecords(callback) {
+  if (!IS_SPEC_FUNCTION(callback))
+    throw MakeTypeError("observe_non_function", ["deliverChangeRecords"]);
+
+  DeliverChangeRecordsForObserver(callback);
+}
+
+function DeliverChangeRecords() {
+  while (observationState.pendingObservers.length) {
+    var pendingObservers = observationState.pendingObservers;
+    observationState.pendingObservers = new InternalArray;
+    for (var i in pendingObservers) {
+      DeliverChangeRecordsForObserver(pendingObservers[i]);
+    }
+  }
+}
+
+function SetupObjectObserve() {
+  %CheckIsBootstrapping();
+  InstallFunctions($Object, DONT_ENUM, $Array(
+    "deliverChangeRecords", ObjectDeliverChangeRecords,
+    "getNotifier", ObjectGetNotifier,
+    "observe", ObjectObserve,
+    "unobserve", ObjectUnobserve
+  ));
+  InstallFunctions(notifierPrototype, DONT_ENUM, $Array(
+    "notify", ObjectNotifierNotify
+  ));
+}
+
+SetupObjectObserve();
diff --git a/deps/v8/src/objects-debug.cc b/deps/v8/src/objects-debug.cc
index 9761ed160b..e3226c18b8 100644
--- a/deps/v8/src/objects-debug.cc
+++ b/deps/v8/src/objects-debug.cc
@@ -35,7 +35,7 @@
 namespace v8 {
 namespace internal {
 
-#ifdef DEBUG
+#ifdef VERIFY_HEAP
 
 void MaybeObject::Verify() {
   Object* this_as_object;
@@ -55,18 +55,18 @@ void Object::VerifyPointer(Object* p) {
   if (p->IsHeapObject()) {
     HeapObject::VerifyHeapPointer(p);
   } else {
-    ASSERT(p->IsSmi());
+    CHECK(p->IsSmi());
   }
 }
 
 
 void Smi::SmiVerify() {
-  ASSERT(IsSmi());
+  CHECK(IsSmi());
 }
 
 
 void Failure::FailureVerify() {
-  ASSERT(IsFailure());
+  CHECK(IsFailure());
 }
 
 
@@ -207,68 +207,68 @@ void HeapObject::HeapObjectVerify() {
 
 
 void HeapObject::VerifyHeapPointer(Object* p) {
-  ASSERT(p->IsHeapObject());
-  ASSERT(HEAP->Contains(HeapObject::cast(p)));
+  CHECK(p->IsHeapObject());
+  CHECK(HEAP->Contains(HeapObject::cast(p)));
 }
 
 
 void HeapNumber::HeapNumberVerify() {
-  ASSERT(IsHeapNumber());
+  CHECK(IsHeapNumber());
 }
 
 
 void ByteArray::ByteArrayVerify() {
-  ASSERT(IsByteArray());
+  CHECK(IsByteArray());
 }
 
 
 void FreeSpace::FreeSpaceVerify() {
-  ASSERT(IsFreeSpace());
+  CHECK(IsFreeSpace());
 }
 
 
 void ExternalPixelArray::ExternalPixelArrayVerify() {
-  ASSERT(IsExternalPixelArray());
+  CHECK(IsExternalPixelArray());
 }
 
 
 void ExternalByteArray::ExternalByteArrayVerify() {
-  ASSERT(IsExternalByteArray());
+  CHECK(IsExternalByteArray());
 }
 
 
 void ExternalUnsignedByteArray::ExternalUnsignedByteArrayVerify() {
-  ASSERT(IsExternalUnsignedByteArray());
+  CHECK(IsExternalUnsignedByteArray());
 }
 
 
 void ExternalShortArray::ExternalShortArrayVerify() {
-  ASSERT(IsExternalShortArray());
+  CHECK(IsExternalShortArray());
 }
 
 
 void ExternalUnsignedShortArray::ExternalUnsignedShortArrayVerify() {
-  ASSERT(IsExternalUnsignedShortArray());
+  CHECK(IsExternalUnsignedShortArray());
 }
 
 
 void ExternalIntArray::ExternalIntArrayVerify() {
-  ASSERT(IsExternalIntArray());
+  CHECK(IsExternalIntArray());
 }
 
 
 void ExternalUnsignedIntArray::ExternalUnsignedIntArrayVerify() {
-  ASSERT(IsExternalUnsignedIntArray());
+  CHECK(IsExternalUnsignedIntArray());
 }
 
 
 void ExternalFloatArray::ExternalFloatArrayVerify() {
-  ASSERT(IsExternalFloatArray());
+  CHECK(IsExternalFloatArray());
 }
 
 
 void ExternalDoubleArray::ExternalDoubleArrayVerify() {
-  ASSERT(IsExternalDoubleArray());
+  CHECK(IsExternalDoubleArray());
 }
 
 
@@ -277,8 +277,8 @@ void JSObject::JSObjectVerify() {
   VerifyHeapPointer(elements());
 
   if (GetElementsKind() == NON_STRICT_ARGUMENTS_ELEMENTS) {
-    ASSERT(this->elements()->IsFixedArray());
-    ASSERT(this->elements()->length() >= 2);
+    CHECK(this->elements()->IsFixedArray());
+    CHECK_GE(this->elements()->length(), 2);
   }
 
   if (HasFastProperties()) {
@@ -286,25 +286,25 @@ void JSObject::JSObjectVerify() {
              (map()->inobject_properties() + properties()->length() -
               map()->NextFreePropertyIndex()));
   }
-  ASSERT_EQ((map()->has_fast_smi_or_object_elements() ||
+  CHECK_EQ((map()->has_fast_smi_or_object_elements() ||
              (elements() == GetHeap()->empty_fixed_array())),
             (elements()->map() == GetHeap()->fixed_array_map() ||
              elements()->map() == GetHeap()->fixed_cow_array_map()));
-  ASSERT(map()->has_fast_object_elements() == HasFastObjectElements());
+  CHECK(map()->has_fast_object_elements() == HasFastObjectElements());
 }
 
 
 void Map::MapVerify() {
-  ASSERT(!HEAP->InNewSpace(this));
-  ASSERT(FIRST_TYPE <= instance_type() && instance_type() <= LAST_TYPE);
-  ASSERT(instance_size() == kVariableSizeSentinel ||
+  CHECK(!HEAP->InNewSpace(this));
+  CHECK(FIRST_TYPE <= instance_type() && instance_type() <= LAST_TYPE);
+  CHECK(instance_size() == kVariableSizeSentinel ||
          (kPointerSize <= instance_size() &&
           instance_size() < HEAP->Capacity()));
   VerifyHeapPointer(prototype());
   VerifyHeapPointer(instance_descriptors());
   DescriptorArray* descriptors = instance_descriptors();
   for (int i = 0; i < NumberOfOwnDescriptors(); ++i) {
-    ASSERT_EQ(i, descriptors->GetDetails(i).descriptor_index() - 1);
+    CHECK_EQ(i, descriptors->GetDetails(i).descriptor_index() - 1);
   }
   SLOW_ASSERT(instance_descriptors()->IsSortedNoDuplicates());
   if (HasTransitionArray()) {
@@ -316,11 +316,11 @@ void Map::MapVerify() {
 
 void Map::SharedMapVerify() {
   MapVerify();
-  ASSERT(is_shared());
-  ASSERT(instance_descriptors()->IsEmpty());
-  ASSERT_EQ(0, pre_allocated_property_fields());
-  ASSERT_EQ(0, unused_property_fields());
-  ASSERT_EQ(StaticVisitorBase::GetVisitorId(instance_type(), instance_size()),
+  CHECK(is_shared());
+  CHECK(instance_descriptors()->IsEmpty());
+  CHECK_EQ(0, pre_allocated_property_fields());
+  CHECK_EQ(0, unused_property_fields());
+  CHECK_EQ(StaticVisitorBase::GetVisitorId(instance_type(), instance_size()),
       visitor_id());
 }
 
@@ -328,15 +328,15 @@ void Map::SharedMapVerify() {
 void CodeCache::CodeCacheVerify() {
   VerifyHeapPointer(default_cache());
   VerifyHeapPointer(normal_type_cache());
-  ASSERT(default_cache()->IsFixedArray());
-  ASSERT(normal_type_cache()->IsUndefined()
+  CHECK(default_cache()->IsFixedArray());
+  CHECK(normal_type_cache()->IsUndefined()
          || normal_type_cache()->IsCodeCacheHashTable());
 }
 
 
 void PolymorphicCodeCache::PolymorphicCodeCacheVerify() {
   VerifyHeapPointer(cache());
-  ASSERT(cache()->IsUndefined() || cache()->IsPolymorphicCodeCacheHashTable());
+  CHECK(cache()->IsUndefined() || cache()->IsPolymorphicCodeCacheHashTable());
 }
 
 
@@ -368,7 +368,7 @@ void FixedDoubleArray::FixedDoubleArrayVerify() {
   for (int i = 0; i < length(); i++) {
     if (!is_the_hole(i)) {
       double value = get_scalar(i);
-      ASSERT(!isnan(value) ||
+      CHECK(!isnan(value) ||
              (BitCast<uint64_t>(value) ==
               BitCast<uint64_t>(canonical_not_the_hole_nan_as_double())) ||
              ((BitCast<uint64_t>(value) & Double::kSignMask) != 0));
@@ -463,13 +463,13 @@ void String::StringVerify() {
     ConsString::cast(this)->ConsStringVerify();
   } else if (IsSlicedString()) {
     SlicedString::cast(this)->SlicedStringVerify();
-  } else if (IsSeqAsciiString()) {
-    SeqAsciiString::cast(this)->SeqAsciiStringVerify();
+  } else if (IsSeqOneByteString()) {
+    SeqOneByteString::cast(this)->SeqOneByteStringVerify();
   }
 }
 
 
-void SeqAsciiString::SeqAsciiStringVerify() {
+void SeqOneByteString::SeqOneByteStringVerify() {
   CHECK(String::IsAscii(GetChars(), length()));
 }
 
@@ -499,7 +499,8 @@ void JSFunction::JSFunctionVerify() {
   VerifyObjectField(kPrototypeOrInitialMapOffset);
   VerifyObjectField(kNextFunctionLinkOffset);
   CHECK(code()->IsCode());
-  CHECK(next_function_link()->IsUndefined() ||
+  CHECK(next_function_link() == NULL ||
+        next_function_link()->IsUndefined() ||
         next_function_link()->IsJSFunction());
 }
 
@@ -555,14 +556,14 @@ void Oddball::OddballVerify() {
   VerifyHeapPointer(to_string());
   Object* number = to_number();
   if (number->IsHeapObject()) {
-    ASSERT(number == HEAP->nan_value());
+    CHECK(number == HEAP->nan_value());
   } else {
-    ASSERT(number->IsSmi());
+    CHECK(number->IsSmi());
     int value = Smi::cast(number)->value();
     // Hidden oddballs have negative smis.
     const int kLeastHiddenOddballNumber = -4;
-    ASSERT(value <= 1);
-    ASSERT(value >= kLeastHiddenOddballNumber);
+    CHECK_LE(value, 1);
+    CHECK(value >= kLeastHiddenOddballNumber);
   }
 }
 
@@ -591,8 +592,8 @@ void Code::CodeVerify() {
 
 void JSArray::JSArrayVerify() {
   JSObjectVerify();
-  ASSERT(length()->IsNumber() || length()->IsUndefined());
-  ASSERT(elements()->IsUndefined() ||
+  CHECK(length()->IsNumber() || length()->IsUndefined());
+  CHECK(elements()->IsUndefined() ||
          elements()->IsFixedArray() ||
          elements()->IsFixedDoubleArray());
 }
@@ -602,7 +603,7 @@ void JSSet::JSSetVerify() {
   CHECK(IsJSSet());
   JSObjectVerify();
   VerifyHeapPointer(table());
-  ASSERT(table()->IsHashTable() || table()->IsUndefined());
+  CHECK(table()->IsHashTable() || table()->IsUndefined());
 }
 
 
@@ -610,7 +611,7 @@ void JSMap::JSMapVerify() {
   CHECK(IsJSMap());
   JSObjectVerify();
   VerifyHeapPointer(table());
-  ASSERT(table()->IsHashTable() || table()->IsUndefined());
+  CHECK(table()->IsHashTable() || table()->IsUndefined());
 }
 
 
@@ -618,17 +619,17 @@ void JSWeakMap::JSWeakMapVerify() {
   CHECK(IsJSWeakMap());
   JSObjectVerify();
   VerifyHeapPointer(table());
-  ASSERT(table()->IsHashTable() || table()->IsUndefined());
+  CHECK(table()->IsHashTable() || table()->IsUndefined());
 }
 
 
 void JSRegExp::JSRegExpVerify() {
   JSObjectVerify();
-  ASSERT(data()->IsUndefined() || data()->IsFixedArray());
+  CHECK(data()->IsUndefined() || data()->IsFixedArray());
   switch (TypeTag()) {
     case JSRegExp::ATOM: {
       FixedArray* arr = FixedArray::cast(data());
-      ASSERT(arr->get(JSRegExp::kAtomPatternIndex)->IsString());
+      CHECK(arr->get(JSRegExp::kAtomPatternIndex)->IsString());
       break;
     }
     case JSRegExp::IRREGEXP: {
@@ -639,26 +640,26 @@ void JSRegExp::JSRegExpVerify() {
       // Smi : Not compiled yet (-1) or code prepared for flushing.
       // JSObject: Compilation error.
       // Code/ByteArray: Compiled code.
-      ASSERT(ascii_data->IsSmi() ||
+      CHECK(ascii_data->IsSmi() ||
              (is_native ? ascii_data->IsCode() : ascii_data->IsByteArray()));
       Object* uc16_data = arr->get(JSRegExp::kIrregexpUC16CodeIndex);
-      ASSERT(uc16_data->IsSmi() ||
+      CHECK(uc16_data->IsSmi() ||
              (is_native ? uc16_data->IsCode() : uc16_data->IsByteArray()));
 
       Object* ascii_saved = arr->get(JSRegExp::kIrregexpASCIICodeSavedIndex);
-      ASSERT(ascii_saved->IsSmi() || ascii_saved->IsString() ||
+      CHECK(ascii_saved->IsSmi() || ascii_saved->IsString() ||
              ascii_saved->IsCode());
       Object* uc16_saved = arr->get(JSRegExp::kIrregexpUC16CodeSavedIndex);
-      ASSERT(uc16_saved->IsSmi() || uc16_saved->IsString() ||
+      CHECK(uc16_saved->IsSmi() || uc16_saved->IsString() ||
              uc16_saved->IsCode());
 
-      ASSERT(arr->get(JSRegExp::kIrregexpCaptureCountIndex)->IsSmi());
-      ASSERT(arr->get(JSRegExp::kIrregexpMaxRegisterCountIndex)->IsSmi());
+      CHECK(arr->get(JSRegExp::kIrregexpCaptureCountIndex)->IsSmi());
+      CHECK(arr->get(JSRegExp::kIrregexpMaxRegisterCountIndex)->IsSmi());
       break;
     }
     default:
-      ASSERT_EQ(JSRegExp::NOT_COMPILED, TypeTag());
-      ASSERT(data()->IsUndefined());
+      CHECK_EQ(JSRegExp::NOT_COMPILED, TypeTag());
+      CHECK(data()->IsUndefined());
       break;
   }
 }
@@ -667,7 +668,7 @@ void JSRegExp::JSRegExpVerify() {
 void JSProxy::JSProxyVerify() {
   CHECK(IsJSProxy());
   VerifyPointer(handler());
-  ASSERT(hash()->IsSmi() || hash()->IsUndefined());
+  CHECK(hash()->IsSmi() || hash()->IsUndefined());
 }
 
 
@@ -680,7 +681,7 @@ void JSFunctionProxy::JSFunctionProxyVerify() {
 
 
 void Foreign::ForeignVerify() {
-  ASSERT(IsForeign());
+  CHECK(IsForeign());
 }
 
 
@@ -784,6 +785,47 @@ void Script::ScriptVerify() {
 }
 
 
+void JSFunctionResultCache::JSFunctionResultCacheVerify() {
+  JSFunction::cast(get(kFactoryIndex))->Verify();
+
+  int size = Smi::cast(get(kCacheSizeIndex))->value();
+  CHECK(kEntriesIndex <= size);
+  CHECK(size <= length());
+  CHECK_EQ(0, size % kEntrySize);
+
+  int finger = Smi::cast(get(kFingerIndex))->value();
+  CHECK(kEntriesIndex <= finger);
+  CHECK((finger < size) || (finger == kEntriesIndex && finger == size));
+  CHECK_EQ(0, finger % kEntrySize);
+
+  if (FLAG_enable_slow_asserts) {
+    for (int i = kEntriesIndex; i < size; i++) {
+      CHECK(!get(i)->IsTheHole());
+      get(i)->Verify();
+    }
+    for (int i = size; i < length(); i++) {
+      CHECK(get(i)->IsTheHole());
+      get(i)->Verify();
+    }
+  }
+}
+
+
+void NormalizedMapCache::NormalizedMapCacheVerify() {
+  FixedArray::cast(this)->Verify();
+  if (FLAG_enable_slow_asserts) {
+    for (int i = 0; i < length(); i++) {
+      Object* e = get(i);
+      if (e->IsMap()) {
+        Map::cast(e)->SharedMapVerify();
+      } else {
+        CHECK(e->IsUndefined());
+      }
+    }
+  }
+}
+
+
 #ifdef ENABLE_DEBUGGER_SUPPORT
 void DebugInfo::DebugInfoVerify() {
   CHECK(IsDebugInfo());
@@ -802,7 +844,9 @@ void BreakPointInfo::BreakPointInfoVerify() {
   VerifyPointer(break_point_objects());
 }
 #endif  // ENABLE_DEBUGGER_SUPPORT
+#endif  // VERIFY_HEAP
 
+#ifdef DEBUG
 
 void JSObject::IncrementSpillStatistics(SpillInformation* info) {
   info->number_of_objects_++;
@@ -901,7 +945,8 @@ void JSObject::SpillInformation::Print() {
 }
 
 
-bool DescriptorArray::IsSortedNoDuplicates() {
+bool DescriptorArray::IsSortedNoDuplicates(int valid_entries) {
+  if (valid_entries == -1) valid_entries = number_of_descriptors();
   String* current_key = NULL;
   uint32_t current = 0;
   for (int i = 0; i < number_of_descriptors(); i++) {
@@ -922,7 +967,8 @@ bool DescriptorArray::IsSortedNoDuplicates() {
 }
 
 
-bool TransitionArray::IsSortedNoDuplicates() {
+bool TransitionArray::IsSortedNoDuplicates(int valid_entries) {
+  ASSERT(valid_entries == -1);
   String* current_key = NULL;
   uint32_t current = 0;
   for (int i = 0; i < number_of_transitions(); i++) {
@@ -960,63 +1006,6 @@ bool TransitionArray::IsConsistentWithBackPointers(Map* current_map) {
 }
 
 
-void JSFunctionResultCache::JSFunctionResultCacheVerify() {
-  JSFunction::cast(get(kFactoryIndex))->Verify();
-
-  int size = Smi::cast(get(kCacheSizeIndex))->value();
-  ASSERT(kEntriesIndex <= size);
-  ASSERT(size <= length());
-  ASSERT_EQ(0, size % kEntrySize);
-
-  int finger = Smi::cast(get(kFingerIndex))->value();
-  ASSERT(kEntriesIndex <= finger);
-  ASSERT((finger < size) || (finger == kEntriesIndex && finger == size));
-  ASSERT_EQ(0, finger % kEntrySize);
-
-  if (FLAG_enable_slow_asserts) {
-    for (int i = kEntriesIndex; i < size; i++) {
-      ASSERT(!get(i)->IsTheHole());
-      get(i)->Verify();
-    }
-    for (int i = size; i < length(); i++) {
-      ASSERT(get(i)->IsTheHole());
-      get(i)->Verify();
-    }
-  }
-}
-
-
-void NormalizedMapCache::NormalizedMapCacheVerify() {
-  FixedArray::cast(this)->Verify();
-  if (FLAG_enable_slow_asserts) {
-    for (int i = 0; i < length(); i++) {
-      Object* e = get(i);
-      if (e->IsMap()) {
-        Map::cast(e)->SharedMapVerify();
-      } else {
-        ASSERT(e->IsUndefined());
-      }
-    }
-  }
-}
-
-
-void Map::ZapTransitions() {
-  TransitionArray* transition_array = transitions();
-  MemsetPointer(transition_array->data_start(),
-                GetHeap()->the_hole_value(),
-                transition_array->length());
-}
-
-
-void Map::ZapPrototypeTransitions() {
-  FixedArray* proto_transitions = GetPrototypeTransitions();
-  MemsetPointer(proto_transitions->data_start(),
-                GetHeap()->the_hole_value(),
-                proto_transitions->length());
-}
-
-
 #endif  // DEBUG
 
 } }  // namespace v8::internal
diff --git a/deps/v8/src/objects-inl.h b/deps/v8/src/objects-inl.h
index 3b9bb0a137..077e782905 100644
--- a/deps/v8/src/objects-inl.h
+++ b/deps/v8/src/objects-inl.h
@@ -134,6 +134,14 @@ bool Object::IsFixedArrayBase() {
 }
 
 
+// External objects are not extensible, so the map check is enough.
+bool Object::IsExternal() {
+  return Object::IsHeapObject() &&
+      HeapObject::cast(this)->map() ==
+      HeapObject::cast(this)->GetHeap()->external_map();
+}
+
+
 bool Object::IsInstanceOf(FunctionTemplateInfo* expected) {
   // There is a constraint on the object; check.
   if (!this->IsJSObject()) return false;
@@ -221,10 +229,10 @@ bool Object::IsSeqString() {
 }
 
 
-bool Object::IsSeqAsciiString() {
+bool Object::IsSeqOneByteString() {
   if (!IsString()) return false;
   return StringShape(String::cast(this)).IsSequential() &&
-         String::cast(this)->IsAsciiRepresentation();
+         String::cast(this)->IsOneByteRepresentation();
 }
 
 
@@ -244,7 +252,7 @@ bool Object::IsExternalString() {
 bool Object::IsExternalAsciiString() {
   if (!IsString()) return false;
   return StringShape(String::cast(this)).IsExternal() &&
-         String::cast(this)->IsAsciiRepresentation();
+         String::cast(this)->IsOneByteRepresentation();
 }
 
 
@@ -287,9 +295,9 @@ bool StringShape::IsSymbol() {
 }
 
 
-bool String::IsAsciiRepresentation() {
+bool String::IsOneByteRepresentation() {
   uint32_t type = map()->instance_type();
-  return (type & kStringEncodingMask) == kAsciiStringTag;
+  return (type & kStringEncodingMask) == kOneByteStringTag;
 }
 
 
@@ -299,18 +307,18 @@ bool String::IsTwoByteRepresentation() {
 }
 
 
-bool String::IsAsciiRepresentationUnderneath() {
+bool String::IsOneByteRepresentationUnderneath() {
   uint32_t type = map()->instance_type();
   STATIC_ASSERT(kIsIndirectStringTag != 0);
   STATIC_ASSERT((kIsIndirectStringMask & kStringEncodingMask) == 0);
   ASSERT(IsFlat());
   switch (type & (kIsIndirectStringMask | kStringEncodingMask)) {
-    case kAsciiStringTag:
+    case kOneByteStringTag:
       return true;
     case kTwoByteStringTag:
       return false;
     default:  // Cons or sliced string.  Need to go deeper.
-      return GetUnderlying()->IsAsciiRepresentation();
+      return GetUnderlying()->IsOneByteRepresentation();
   }
 }
 
@@ -321,7 +329,7 @@ bool String::IsTwoByteRepresentationUnderneath() {
   STATIC_ASSERT((kIsIndirectStringMask & kStringEncodingMask) == 0);
   ASSERT(IsFlat());
   switch (type & (kIsIndirectStringMask | kStringEncodingMask)) {
-    case kAsciiStringTag:
+    case kOneByteStringTag:
       return false;
     case kTwoByteStringTag:
       return true;
@@ -333,8 +341,7 @@ bool String::IsTwoByteRepresentationUnderneath() {
 
 bool String::HasOnlyAsciiChars() {
   uint32_t type = map()->instance_type();
-  return (type & kStringEncodingMask) == kAsciiStringTag ||
-         (type & kAsciiDataHintMask) == kAsciiDataHintTag;
+  return (type & kAsciiDataHintMask) == kAsciiDataHintTag;
 }
 
 
@@ -382,9 +389,12 @@ uint32_t StringShape::full_representation_tag() {
 STATIC_CHECK((kStringRepresentationMask | kStringEncodingMask) ==
              Internals::kFullStringRepresentationMask);
 
+STATIC_CHECK(static_cast<uint32_t>(kStringEncodingMask) ==
+             Internals::kStringEncodingMask);
+
 
 bool StringShape::IsSequentialAscii() {
-  return full_representation_tag() == (kSeqStringTag | kAsciiStringTag);
+  return full_representation_tag() == (kSeqStringTag | kOneByteStringTag);
 }
 
 
@@ -394,10 +404,16 @@ bool StringShape::IsSequentialTwoByte() {
 
 
 bool StringShape::IsExternalAscii() {
-  return full_representation_tag() == (kExternalStringTag | kAsciiStringTag);
+  return full_representation_tag() == (kExternalStringTag | kOneByteStringTag);
 }
 
 
+STATIC_CHECK((kExternalStringTag | kOneByteStringTag) ==
+             Internals::kExternalAsciiRepresentationTag);
+
+STATIC_CHECK(v8::String::ASCII_ENCODING == kOneByteStringTag);
+
+
 bool StringShape::IsExternalTwoByte() {
   return full_representation_tag() == (kExternalStringTag | kTwoByteStringTag);
 }
@@ -406,6 +422,7 @@ bool StringShape::IsExternalTwoByte() {
 STATIC_CHECK((kExternalStringTag | kTwoByteStringTag) ==
              Internals::kExternalTwoByteRepresentationTag);
 
+STATIC_CHECK(v8::String::TWO_BYTE_ENCODING == kTwoByteStringTag);
 
 uc32 FlatStringReader::Get(int index) {
   ASSERT(0 <= index && index <= length_);
@@ -650,8 +667,8 @@ bool Object::IsDictionary() {
 
 
 bool Object::IsSymbolTable() {
-  return IsHashTable() && this ==
-         HeapObject::cast(this)->GetHeap()->raw_unchecked_symbol_table();
+  return IsHashTable() &&
+      this == HeapObject::cast(this)->GetHeap()->raw_unchecked_symbol_table();
 }
 
 
@@ -664,7 +681,7 @@ bool Object::IsJSFunctionResultCache() {
       % JSFunctionResultCache::kEntrySize != 0) {
     return false;
   }
-#ifdef DEBUG
+#ifdef VERIFY_HEAP
   if (FLAG_verify_heap) {
     reinterpret_cast<JSFunctionResultCache*>(this)->
         JSFunctionResultCacheVerify();
@@ -679,7 +696,7 @@ bool Object::IsNormalizedMapCache() {
   if (FixedArray::cast(this)->length() != NormalizedMapCache::kEntries) {
     return false;
   }
-#ifdef DEBUG
+#ifdef VERIFY_HEAP
   if (FLAG_verify_heap) {
     reinterpret_cast<NormalizedMapCache*>(this)->NormalizedMapCacheVerify();
   }
@@ -708,6 +725,11 @@ bool Object::IsMapCache() {
 }
 
 
+bool Object::IsObjectHashTable() {
+  return IsHashTable();
+}
+
+
 bool Object::IsPrimitive() {
   return IsOddball() || IsNumber() || IsString();
 }
@@ -1042,7 +1064,11 @@ Failure* Failure::Construct(Type type, intptr_t value) {
   uintptr_t info =
       (static_cast<uintptr_t>(value) << kFailureTypeTagSize) | type;
   ASSERT(((info << kFailureTagSize) >> kFailureTagSize) == info);
-  return reinterpret_cast<Failure*>((info << kFailureTagSize) | kFailureTag);
+  // Fill the unused bits with a pattern that's easy to recognize in crash
+  // dumps.
+  static const int kFailureMagicPattern = 0x0BAD0000;
+  return reinterpret_cast<Failure*>(
+      (info << kFailureTagSize) | kFailureTag | kFailureMagicPattern);
 }
 
 
@@ -1100,13 +1126,13 @@ HeapObject* MapWord::ToForwardingAddress() {
 }
 
 
-#ifdef DEBUG
+#ifdef VERIFY_HEAP
 void HeapObject::VerifyObjectField(int offset) {
   VerifyPointer(READ_FIELD(this, offset));
 }
 
 void HeapObject::VerifySmiField(int offset) {
-  ASSERT(READ_FIELD(this, offset)->IsSmi());
+  CHECK(READ_FIELD(this, offset)->IsSmi());
 }
 #endif
 
@@ -1404,6 +1430,43 @@ MaybeObject* JSObject::ResetElements() {
 }
 
 
+MaybeObject* JSObject::AddFastPropertyUsingMap(Map* map) {
+  ASSERT(this->map()->NumberOfOwnDescriptors() + 1 ==
+         map->NumberOfOwnDescriptors());
+  if (this->map()->unused_property_fields() == 0) {
+    int new_size = properties()->length() + map->unused_property_fields() + 1;
+    FixedArray* new_properties;
+    MaybeObject* maybe_properties = properties()->CopySize(new_size);
+    if (!maybe_properties->To(&new_properties)) return maybe_properties;
+    set_properties(new_properties);
+  }
+  set_map(map);
+  return this;
+}
+
+
+bool JSObject::TryTransitionToField(Handle<JSObject> object,
+                                    Handle<String> key) {
+  if (!object->map()->HasTransitionArray()) return false;
+  Handle<TransitionArray> transitions(object->map()->transitions());
+  int transition = transitions->Search(*key);
+  if (transition == TransitionArray::kNotFound) return false;
+  PropertyDetails target_details = transitions->GetTargetDetails(transition);
+  if (target_details.type() != FIELD) return false;
+  if (target_details.attributes() != NONE) return false;
+  Handle<Map> target(transitions->GetTarget(transition));
+  JSObject::AddFastPropertyUsingMap(object, target);
+  return true;
+}
+
+
+int JSObject::LastAddedFieldIndex() {
+  Map* map = this->map();
+  int last_added = map->LastAdded();
+  return map->instance_descriptors()->GetFieldIndex(last_added);
+}
+
+
 ACCESSORS(Oddball, to_string, String, kToStringOffset)
 ACCESSORS(Oddball, to_number, Object, kToNumberOffset)
 
@@ -1803,7 +1866,7 @@ void FixedArray::set(int index,
 void FixedArray::NoIncrementalWriteBarrierSet(FixedArray* array,
                                               int index,
                                               Object* value) {
-  ASSERT(array->map() != HEAP->raw_unchecked_fixed_cow_array_map());
+  ASSERT(array->map() != HEAP->fixed_cow_array_map());
   ASSERT(index >= 0 && index < array->length());
   int offset = kHeaderSize + index * kPointerSize;
   WRITE_FIELD(array, offset, value);
@@ -1817,7 +1880,7 @@ void FixedArray::NoIncrementalWriteBarrierSet(FixedArray* array,
 void FixedArray::NoWriteBarrierSet(FixedArray* array,
                                    int index,
                                    Object* value) {
-  ASSERT(array->map() != HEAP->raw_unchecked_fixed_cow_array_map());
+  ASSERT(array->map() != HEAP->fixed_cow_array_map());
   ASSERT(index >= 0 && index < array->length());
   ASSERT(!HEAP->InNewSpace(value));
   WRITE_FIELD(array, kHeaderSize + index * kPointerSize, value);
@@ -1884,6 +1947,11 @@ void FixedArray::set_null_unchecked(Heap* heap, int index) {
 }
 
 
+double* FixedDoubleArray::data_start() {
+  return reinterpret_cast<double*>(FIELD_ADDR(this, kHeaderSize));
+}
+
+
 Object** FixedArray::data_start() {
   return HeapObject::RawField(this, kHeaderSize);
 }
@@ -1896,11 +1964,17 @@ bool DescriptorArray::IsEmpty() {
 }
 
 
+void DescriptorArray::SetNumberOfDescriptors(int number_of_descriptors) {
+  WRITE_FIELD(
+      this, kDescriptorLengthOffset, Smi::FromInt(number_of_descriptors));
+}
+
+
 // Perform a binary search in a fixed array. Low and high are entry indices. If
 // there are three entries in this array it should be called with low=0 and
 // high=2.
-template<typename T>
-int BinarySearch(T* array, String* name, int low, int high) {
+template<SearchMode search_mode, typename T>
+int BinarySearch(T* array, String* name, int low, int high, int valid_entries) {
   uint32_t hash = name->Hash();
   int limit = high;
 
@@ -1922,60 +1996,83 @@ int BinarySearch(T* array, String* name, int low, int high) {
     int sort_index = array->GetSortedKeyIndex(low);
     String* entry = array->GetKey(sort_index);
     if (entry->Hash() != hash) break;
-    if (entry->Equals(name)) return sort_index;
+    if (entry->Equals(name)) {
+      if (search_mode == ALL_ENTRIES || sort_index < valid_entries) {
+        return sort_index;
+      }
+      return T::kNotFound;
+    }
   }
 
   return T::kNotFound;
 }
 
+
 // Perform a linear search in this fixed array. len is the number of entry
 // indices that are valid.
-template<typename T>
-int LinearSearch(T* array, String* name, int len) {
+template<SearchMode search_mode, typename T>
+int LinearSearch(T* array, String* name, int len, int valid_entries) {
   uint32_t hash = name->Hash();
-  for (int number = 0; number < len; number++) {
-    int sorted_index = array->GetSortedKeyIndex(number);
-    String* entry = array->GetKey(sorted_index);
-    uint32_t current_hash = entry->Hash();
-    if (current_hash > hash) break;
-    if (current_hash == hash && entry->Equals(name)) return sorted_index;
+  if (search_mode == ALL_ENTRIES) {
+    for (int number = 0; number < len; number++) {
+      int sorted_index = array->GetSortedKeyIndex(number);
+      String* entry = array->GetKey(sorted_index);
+      uint32_t current_hash = entry->Hash();
+      if (current_hash > hash) break;
+      if (current_hash == hash && entry->Equals(name)) return sorted_index;
+    }
+  } else {
+    ASSERT(len >= valid_entries);
+    for (int number = 0; number < valid_entries; number++) {
+      String* entry = array->GetKey(number);
+      uint32_t current_hash = entry->Hash();
+      if (current_hash == hash && entry->Equals(name)) return number;
+    }
   }
   return T::kNotFound;
 }
 
 
-template<typename T>
-int Search(T* array, String* name) {
-  SLOW_ASSERT(array->IsSortedNoDuplicates());
+template<SearchMode search_mode, typename T>
+int Search(T* array, String* name, int valid_entries) {
+  if (search_mode == VALID_ENTRIES) {
+    SLOW_ASSERT(array->IsSortedNoDuplicates(valid_entries));
+  } else {
+    SLOW_ASSERT(array->IsSortedNoDuplicates());
+  }
 
   int nof = array->number_of_entries();
   if (nof == 0) return T::kNotFound;
 
   // Fast case: do linear search for small arrays.
   const int kMaxElementsForLinearSearch = 8;
-  if (nof < kMaxElementsForLinearSearch) {
-    return LinearSearch(array, name, nof);
+  if ((search_mode == ALL_ENTRIES &&
+       nof <= kMaxElementsForLinearSearch) ||
+      (search_mode == VALID_ENTRIES &&
+       valid_entries <= (kMaxElementsForLinearSearch * 3))) {
+    return LinearSearch<search_mode>(array, name, nof, valid_entries);
   }
 
   // Slow case: perform binary search.
-  return BinarySearch(array, name, 0, nof - 1);
+  return BinarySearch<search_mode>(array, name, 0, nof - 1, valid_entries);
 }
 
 
-int DescriptorArray::Search(String* name) {
-  return internal::Search(this, name);
+int DescriptorArray::Search(String* name, int valid_descriptors) {
+  return internal::Search<VALID_ENTRIES>(this, name, valid_descriptors);
 }
 
 
-int DescriptorArray::SearchWithCache(String* name) {
-  if (number_of_descriptors() == 0) return kNotFound;
+int DescriptorArray::SearchWithCache(String* name, Map* map) {
+  int number_of_own_descriptors = map->NumberOfOwnDescriptors();
+  if (number_of_own_descriptors == 0) return kNotFound;
 
   DescriptorLookupCache* cache = GetIsolate()->descriptor_lookup_cache();
-  int number = cache->Lookup(this, name);
+  int number = cache->Lookup(map, name);
 
   if (number == DescriptorLookupCache::kAbsent) {
-    number = Search(name);
-    cache->Update(this, name, number);
+    number = Search(name, number_of_own_descriptors);
+    cache->Update(map, name, number);
   }
 
   return number;
@@ -1986,7 +2083,7 @@ void Map::LookupDescriptor(JSObject* holder,
                            String* name,
                            LookupResult* result) {
   DescriptorArray* descriptors = this->instance_descriptors();
-  int number = descriptors->SearchWithCache(name);
+  int number = descriptors->SearchWithCache(name, this);
   if (number == DescriptorArray::kNotFound) return result->NotFound();
   result->DescriptorResult(holder, descriptors->GetDetails(number), number);
 }
@@ -2030,10 +2127,9 @@ String* DescriptorArray::GetSortedKey(int descriptor_number) {
 }
 
 
-void DescriptorArray::SetSortedKey(int pointer, int descriptor_number) {
-  int details_index = ToDetailsIndex(pointer);
-  PropertyDetails details = PropertyDetails(Smi::cast(get(details_index)));
-  set_unchecked(details_index, details.set_pointer(descriptor_number).AsSmi());
+void DescriptorArray::SetSortedKey(int descriptor_index, int pointer) {
+  PropertyDetails details = GetDetails(descriptor_index);
+  set(ToDetailsIndex(descriptor_index), details.set_pointer(pointer).AsSmi());
 }
 
 
@@ -2114,24 +2210,59 @@ void DescriptorArray::Set(int descriptor_number,
 }
 
 
+void DescriptorArray::Set(int descriptor_number, Descriptor* desc) {
+  // Range check.
+  ASSERT(descriptor_number < number_of_descriptors());
+  ASSERT(desc->GetDetails().descriptor_index() <=
+         number_of_descriptors());
+  ASSERT(desc->GetDetails().descriptor_index() > 0);
+
+  set(ToKeyIndex(descriptor_number), desc->GetKey());
+  set(ToValueIndex(descriptor_number), desc->GetValue());
+  set(ToDetailsIndex(descriptor_number), desc->GetDetails().AsSmi());
+}
+
+
 void DescriptorArray::Append(Descriptor* desc,
-                             const WhitenessWitness& witness,
-                             int number_of_set_descriptors) {
-  int enumeration_index = number_of_set_descriptors + 1;
+                             const WhitenessWitness& witness) {
+  int descriptor_number = number_of_descriptors();
+  int enumeration_index = descriptor_number + 1;
+  SetNumberOfDescriptors(descriptor_number + 1);
+  desc->SetEnumerationIndex(enumeration_index);
+  Set(descriptor_number, desc, witness);
+
+  uint32_t hash = desc->GetKey()->Hash();
+
+  int insertion;
+
+  for (insertion = descriptor_number; insertion > 0; --insertion) {
+    String* key = GetSortedKey(insertion - 1);
+    if (key->Hash() <= hash) break;
+    SetSortedKey(insertion, GetSortedKeyIndex(insertion - 1));
+  }
+
+  SetSortedKey(insertion, descriptor_number);
+}
+
+
+void DescriptorArray::Append(Descriptor* desc) {
+  int descriptor_number = number_of_descriptors();
+  int enumeration_index = descriptor_number + 1;
+  SetNumberOfDescriptors(descriptor_number + 1);
   desc->SetEnumerationIndex(enumeration_index);
-  Set(number_of_set_descriptors, desc, witness);
+  Set(descriptor_number, desc);
 
   uint32_t hash = desc->GetKey()->Hash();
 
   int insertion;
 
-  for (insertion = number_of_set_descriptors; insertion > 0; --insertion) {
+  for (insertion = descriptor_number; insertion > 0; --insertion) {
     String* key = GetSortedKey(insertion - 1);
     if (key->Hash() <= hash) break;
     SetSortedKey(insertion, GetSortedKeyIndex(insertion - 1));
   }
 
-  SetSortedKey(insertion, number_of_set_descriptors);
+  SetSortedKey(insertion, descriptor_number);
 }
 
 
@@ -2142,14 +2273,14 @@ void DescriptorArray::SwapSortedKeys(int first, int second) {
 }
 
 
-FixedArray::WhitenessWitness::WhitenessWitness(FixedArray* array)
+DescriptorArray::WhitenessWitness::WhitenessWitness(FixedArray* array)
     : marking_(array->GetHeap()->incremental_marking()) {
   marking_->EnterNoMarkingScope();
   ASSERT(Marking::Color(array) == Marking::WHITE_OBJECT);
 }
 
 
-FixedArray::WhitenessWitness::~WhitenessWitness() {
+DescriptorArray::WhitenessWitness::~WhitenessWitness() {
   marking_->LeaveNoMarkingScope();
 }
 
@@ -2180,7 +2311,8 @@ int HashTable<Shape, Key>::FindEntry(Isolate* isolate, Key key) {
   // EnsureCapacity will guarantee the hash table is never full.
   while (true) {
     Object* element = KeyAt(entry);
-    // Empty entry.
+    // Empty entry. Uses raw unchecked accessors because it is called by the
+    // symbol table during bootstrapping.
     if (element == isolate->heap()->raw_unchecked_undefined_value()) break;
     if (element != isolate->heap()->raw_unchecked_the_hole_value() &&
         Shape::IsMatch(key, element)) return entry;
@@ -2230,7 +2362,7 @@ CAST_ACCESSOR(PolymorphicCodeCacheHashTable)
 CAST_ACCESSOR(MapCache)
 CAST_ACCESSOR(String)
 CAST_ACCESSOR(SeqString)
-CAST_ACCESSOR(SeqAsciiString)
+CAST_ACCESSOR(SeqOneByteString)
 CAST_ACCESSOR(SeqTwoByteString)
 CAST_ACCESSOR(SlicedString)
 CAST_ACCESSOR(ConsString)
@@ -2334,18 +2466,18 @@ String* String::TryFlattenGetString(PretenureFlag pretenure) {
 uint16_t String::Get(int index) {
   ASSERT(index >= 0 && index < length());
   switch (StringShape(this).full_representation_tag()) {
-    case kSeqStringTag | kAsciiStringTag:
-      return SeqAsciiString::cast(this)->SeqAsciiStringGet(index);
+    case kSeqStringTag | kOneByteStringTag:
+      return SeqOneByteString::cast(this)->SeqOneByteStringGet(index);
     case kSeqStringTag | kTwoByteStringTag:
       return SeqTwoByteString::cast(this)->SeqTwoByteStringGet(index);
-    case kConsStringTag | kAsciiStringTag:
+    case kConsStringTag | kOneByteStringTag:
     case kConsStringTag | kTwoByteStringTag:
       return ConsString::cast(this)->ConsStringGet(index);
-    case kExternalStringTag | kAsciiStringTag:
+    case kExternalStringTag | kOneByteStringTag:
       return ExternalAsciiString::cast(this)->ExternalAsciiStringGet(index);
     case kExternalStringTag | kTwoByteStringTag:
       return ExternalTwoByteString::cast(this)->ExternalTwoByteStringGet(index);
-    case kSlicedStringTag | kAsciiStringTag:
+    case kSlicedStringTag | kOneByteStringTag:
     case kSlicedStringTag | kTwoByteStringTag:
       return SlicedString::cast(this)->SlicedStringGet(index);
     default:
@@ -2361,8 +2493,8 @@ void String::Set(int index, uint16_t value) {
   ASSERT(index >= 0 && index < length());
   ASSERT(StringShape(this).IsSequential());
 
-  return this->IsAsciiRepresentation()
-      ? SeqAsciiString::cast(this)->SeqAsciiStringSet(index, value)
+  return this->IsOneByteRepresentation()
+      ? SeqOneByteString::cast(this)->SeqOneByteStringSet(index, value)
       : SeqTwoByteString::cast(this)->SeqTwoByteStringSet(index, value);
 }
 
@@ -2384,25 +2516,96 @@ String* String::GetUnderlying() {
 }
 
 
-uint16_t SeqAsciiString::SeqAsciiStringGet(int index) {
+template<class Visitor, class ConsOp>
+void String::Visit(
+    String* string,
+    unsigned offset,
+    Visitor& visitor,
+    ConsOp& consOp,
+    int32_t type,
+    unsigned length) {
+
+  ASSERT(length == static_cast<unsigned>(string->length()));
+  ASSERT(offset <= length);
+
+  unsigned sliceOffset = offset;
+  while (true) {
+    ASSERT(type == string->map()->instance_type());
+
+    switch (type & (kStringRepresentationMask | kStringEncodingMask)) {
+      case kSeqStringTag | kOneByteStringTag:
+        visitor.VisitOneByteString(
+            reinterpret_cast<const uint8_t*>(
+                SeqOneByteString::cast(string)->GetChars()) + sliceOffset,
+                length - offset);
+        return;
+
+      case kSeqStringTag | kTwoByteStringTag:
+        visitor.VisitTwoByteString(
+            reinterpret_cast<const uint16_t*>(
+                SeqTwoByteString::cast(string)->GetChars()) + sliceOffset,
+                length - offset);
+        return;
+
+      case kExternalStringTag | kOneByteStringTag:
+        visitor.VisitOneByteString(
+            reinterpret_cast<const uint8_t*>(
+                ExternalAsciiString::cast(string)->GetChars()) + sliceOffset,
+                length - offset);
+        return;
+
+      case kExternalStringTag | kTwoByteStringTag:
+        visitor.VisitTwoByteString(
+            reinterpret_cast<const uint16_t*>(
+                ExternalTwoByteString::cast(string)->GetChars()) + sliceOffset,
+                length - offset);
+        return;
+
+      case kSlicedStringTag | kOneByteStringTag:
+      case kSlicedStringTag | kTwoByteStringTag: {
+        SlicedString* slicedString = SlicedString::cast(string);
+        sliceOffset += slicedString->offset();
+        string = slicedString->parent();
+        type = string->map()->instance_type();
+        continue;
+      }
+
+      case kConsStringTag | kOneByteStringTag:
+      case kConsStringTag | kTwoByteStringTag:
+        string = consOp.Operate(ConsString::cast(string), &offset, &type,
+            &length);
+        if (string == NULL) return;
+        sliceOffset = offset;
+        ASSERT(length == static_cast<unsigned>(string->length()));
+        continue;
+
+      default:
+        UNREACHABLE();
+        return;
+    }
+  }
+}
+
+
+uint16_t SeqOneByteString::SeqOneByteStringGet(int index) {
   ASSERT(index >= 0 && index < length());
   return READ_BYTE_FIELD(this, kHeaderSize + index * kCharSize);
 }
 
 
-void SeqAsciiString::SeqAsciiStringSet(int index, uint16_t value) {
+void SeqOneByteString::SeqOneByteStringSet(int index, uint16_t value) {
   ASSERT(index >= 0 && index < length() && value <= kMaxAsciiCharCode);
   WRITE_BYTE_FIELD(this, kHeaderSize + index * kCharSize,
                    static_cast<byte>(value));
 }
 
 
-Address SeqAsciiString::GetCharsAddress() {
+Address SeqOneByteString::GetCharsAddress() {
   return FIELD_ADDR(this, kHeaderSize);
 }
 
 
-char* SeqAsciiString::GetChars() {
+char* SeqOneByteString::GetChars() {
   return reinterpret_cast<char*>(GetCharsAddress());
 }
 
@@ -2434,7 +2637,7 @@ int SeqTwoByteString::SeqTwoByteStringSize(InstanceType instance_type) {
 }
 
 
-int SeqAsciiString::SeqAsciiStringSize(InstanceType instance_type) {
+int SeqOneByteString::SeqOneByteStringSize(InstanceType instance_type) {
   return SizeFor(length());
 }
 
@@ -2562,6 +2765,146 @@ const uint16_t* ExternalTwoByteString::ExternalTwoByteStringGetData(
 }
 
 
+unsigned ConsStringIteratorOp::OffsetForDepth(unsigned depth) {
+  return depth & kDepthMask;
+}
+
+
+uint32_t ConsStringIteratorOp::MaskForDepth(unsigned depth) {
+  return 1 << OffsetForDepth(depth);
+}
+
+
+void ConsStringIteratorOp::SetRightDescent() {
+  trace_ |= MaskForDepth(depth_ - 1);
+}
+
+
+void ConsStringIteratorOp::ClearRightDescent() {
+  trace_ &= ~MaskForDepth(depth_ - 1);
+}
+
+
+void ConsStringIteratorOp::PushLeft(ConsString* string) {
+  frames_[depth_++ & kDepthMask] = string;
+}
+
+
+void ConsStringIteratorOp::PushRight(ConsString* string, int32_t type) {
+  // Inplace update
+  frames_[(depth_-1) & kDepthMask] = string;
+  if (depth_ != 1) return;
+  // Optimization: can replace root in this case.
+  root_ = string;
+  root_type_ = type;
+  root_length_ = string->length();
+}
+
+
+void ConsStringIteratorOp::AdjustMaximumDepth() {
+  if (depth_ > maximum_depth_) maximum_depth_ = depth_;
+}
+
+
+void ConsStringIteratorOp::Pop() {
+  ASSERT(depth_ > 0);
+  ASSERT(depth_ <= maximum_depth_);
+  depth_--;
+}
+
+
+void ConsStringIteratorOp::Reset() {
+  consumed_ = 0;
+  ResetStack();
+}
+
+
+bool ConsStringIteratorOp::HasMore() {
+  return depth_ != 0;
+}
+
+
+void ConsStringIteratorOp::ResetStack() {
+  depth_ = 0;
+  maximum_depth_ = 0;
+}
+
+
+bool ConsStringIteratorOp::ContinueOperation(ContinueResponse* response) {
+  bool blewStack;
+  int32_t type;
+  String* string = NextLeaf(&blewStack, &type);
+  // String found.
+  if (string != NULL) {
+    unsigned length = string->length();
+    consumed_ += length;
+    response->string_ = string;
+    response->offset_ = 0;
+    response->length_ = length;
+    response->type_ = type;
+    return true;
+  }
+  // Traversal complete.
+  if (!blewStack) return false;
+  // Restart search.
+  ResetStack();
+  response->string_ = root_;
+  response->offset_ = consumed_;
+  response->length_ = root_length_;
+  response->type_ = root_type_;
+  return true;
+}
+
+
+uint16_t StringCharacterStream::GetNext() {
+  ASSERT(buffer8_ != NULL);
+  return is_one_byte_ ? *buffer8_++ : *buffer16_++;
+}
+
+
+StringCharacterStream::StringCharacterStream(
+    String* string, unsigned offset, ConsStringIteratorOp* op)
+  : is_one_byte_(true),
+    buffer8_(NULL),
+    end_(NULL),
+    op_(op) {
+  op->Reset();
+  String::Visit(string,
+      offset, *this, *op, string->map()->instance_type(), string->length());
+}
+
+
+bool StringCharacterStream::HasMore() {
+  if (buffer8_ != end_) return true;
+  if (!op_->HasMore()) return false;
+  ConsStringIteratorOp::ContinueResponse response;
+  // This has been checked above
+  if (!op_->ContinueOperation(&response)) {
+    UNREACHABLE();
+    return false;
+  }
+  String::Visit(response.string_,
+      response.offset_, *this, *op_, response.type_, response.length_);
+  return true;
+}
+
+
+void StringCharacterStream::VisitOneByteString(
+    const uint8_t* chars, unsigned length) {
+  is_one_byte_ = true;
+  buffer8_ = chars;
+  end_ = chars + length;
+}
+
+
+void StringCharacterStream::VisitTwoByteString(
+    const uint16_t* chars, unsigned length) {
+  is_one_byte_ = false;
+  buffer16_ = chars;
+  end_ = reinterpret_cast<const uint8_t*>(chars + length);
+}
+
+
 void JSFunctionResultCache::MakeZeroSize() {
   set_finger_index(kEntriesIndex);
   set_size(kEntriesIndex);
@@ -2852,8 +3195,8 @@ int HeapObject::SizeFromMap(Map* map) {
     return FixedArray::BodyDescriptor::SizeOf(map, this);
   }
   if (instance_type == ASCII_STRING_TYPE) {
-    return SeqAsciiString::SizeFor(
-        reinterpret_cast<SeqAsciiString*>(this)->length());
+    return SeqOneByteString::SizeFor(
+        reinterpret_cast<SeqOneByteString*>(this)->length());
   }
   if (instance_type == BYTE_ARRAY_TYPE) {
     return reinterpret_cast<ByteArray*>(this)->ByteArraySize();
@@ -3030,6 +3373,26 @@ Code::Flags Code::flags() {
 }
 
 
+void Map::set_owns_descriptors(bool is_shared) {
+  set_bit_field3(OwnsDescriptors::update(bit_field3(), is_shared));
+}
+
+
+bool Map::owns_descriptors() {
+  return OwnsDescriptors::decode(bit_field3());
+}
+
+
+void Map::set_is_observed(bool is_observed) {
+  set_bit_field3(IsObserved::update(bit_field3(), is_observed));
+}
+
+
+bool Map::is_observed() {
+  return IsObserved::decode(bit_field3());
+}
+
+
 void Code::set_flags(Code::Flags flags) {
   STATIC_ASSERT(Code::NUMBER_OF_KINDS <= KindField::kMax + 1);
   // Make sure that all call stubs have an arguments count.
@@ -3272,66 +3635,6 @@ void Code::set_unary_op_type(byte value) {
 }
 
 
-byte Code::binary_op_type() {
-  ASSERT(is_binary_op_stub());
-  return BinaryOpTypeField::decode(
-      READ_UINT32_FIELD(this, kKindSpecificFlags1Offset));
-}
-
-
-void Code::set_binary_op_type(byte value) {
-  ASSERT(is_binary_op_stub());
-  int previous = READ_UINT32_FIELD(this, kKindSpecificFlags1Offset);
-  int updated = BinaryOpTypeField::update(previous, value);
-  WRITE_UINT32_FIELD(this, kKindSpecificFlags1Offset, updated);
-}
-
-
-byte Code::binary_op_result_type() {
-  ASSERT(is_binary_op_stub());
-  return BinaryOpResultTypeField::decode(
-      READ_UINT32_FIELD(this, kKindSpecificFlags1Offset));
-}
-
-
-void Code::set_binary_op_result_type(byte value) {
-  ASSERT(is_binary_op_stub());
-  int previous = READ_UINT32_FIELD(this, kKindSpecificFlags1Offset);
-  int updated = BinaryOpResultTypeField::update(previous, value);
-  WRITE_UINT32_FIELD(this, kKindSpecificFlags1Offset, updated);
-}
-
-
-byte Code::compare_state() {
-  ASSERT(is_compare_ic_stub());
-  return CompareStateField::decode(
-      READ_UINT32_FIELD(this, kKindSpecificFlags1Offset));
-}
-
-
-void Code::set_compare_state(byte value) {
-  ASSERT(is_compare_ic_stub());
-  int previous = READ_UINT32_FIELD(this, kKindSpecificFlags1Offset);
-  int updated = CompareStateField::update(previous, value);
-  WRITE_UINT32_FIELD(this, kKindSpecificFlags1Offset, updated);
-}
-
-
-byte Code::compare_operation() {
-  ASSERT(is_compare_ic_stub());
-  return CompareOperationField::decode(
-      READ_UINT32_FIELD(this, kKindSpecificFlags1Offset));
-}
-
-
-void Code::set_compare_operation(byte value) {
-  ASSERT(is_compare_ic_stub());
-  int previous = READ_UINT32_FIELD(this, kKindSpecificFlags1Offset);
-  int updated = CompareOperationField::update(previous, value);
-  WRITE_UINT32_FIELD(this, kKindSpecificFlags1Offset, updated);
-}
-
-
 byte Code::to_boolean_state() {
   ASSERT(is_to_boolean_ic_stub());
   return ToBooleanStateField::decode(
@@ -3465,41 +3768,30 @@ void Map::set_prototype(Object* value, WriteBarrierMode mode) {
 }
 
 
-DescriptorArray* Map::instance_descriptors() {
-  if (!HasTransitionArray()) return GetHeap()->empty_descriptor_array();
-  return transitions()->descriptors();
-}
-
-
 // If the descriptor is using the empty transition array, install a new empty
 // transition array that will have place for an element transition.
 static MaybeObject* EnsureHasTransitionArray(Map* map) {
-  if (map->HasTransitionArray()) return map;
-
   TransitionArray* transitions;
-  MaybeObject* maybe_transitions = TransitionArray::Allocate(0);
-  if (!maybe_transitions->To(&transitions)) return maybe_transitions;
+  MaybeObject* maybe_transitions;
+  if (!map->HasTransitionArray()) {
+    maybe_transitions = TransitionArray::Allocate(0);
+    if (!maybe_transitions->To(&transitions)) return maybe_transitions;
+    transitions->set_back_pointer_storage(map->GetBackPointer());
+  } else if (!map->transitions()->IsFullTransitionArray()) {
+    maybe_transitions = map->transitions()->ExtendToFullTransitionArray();
+    if (!maybe_transitions->To(&transitions)) return maybe_transitions;
+  } else {
+    return map;
+  }
   map->set_transitions(transitions);
   return transitions;
 }
 
 
-MaybeObject* Map::SetDescriptors(DescriptorArray* value,
-                                 WriteBarrierMode mode) {
-  ASSERT(!is_shared());
-  MaybeObject* maybe_failure = EnsureHasTransitionArray(this);
-  if (maybe_failure->IsFailure()) return maybe_failure;
-
-  transitions()->set_descriptors(value, mode);
-  return this;
-}
-
-
-MaybeObject* Map::InitializeDescriptors(DescriptorArray* descriptors) {
-#ifdef DEBUG
+void Map::InitializeDescriptors(DescriptorArray* descriptors) {
   int len = descriptors->number_of_descriptors();
+#ifdef DEBUG
   ASSERT(len <= DescriptorArray::kMaxNumberOfDescriptors);
-  SLOW_ASSERT(descriptors->IsSortedNoDuplicates());
 
   bool used_indices[DescriptorArray::kMaxNumberOfDescriptors];
   for (int i = 0; i < len; ++i) used_indices[i] = false;
@@ -3515,28 +3807,22 @@ MaybeObject* Map::InitializeDescriptors(DescriptorArray* descriptors) {
   }
 #endif
 
-  MaybeObject* maybe_failure = SetDescriptors(descriptors);
-  if (maybe_failure->IsFailure()) return maybe_failure;
-
-  SetNumberOfOwnDescriptors(descriptors->number_of_descriptors());
-
-  return this;
+  set_instance_descriptors(descriptors);
+  SetNumberOfOwnDescriptors(len);
 }
 
 
+ACCESSORS(Map, instance_descriptors, DescriptorArray, kDescriptorsOffset)
 SMI_ACCESSORS(Map, bit_field3, kBitField3Offset)
 
 
 void Map::ClearTransitions(Heap* heap, WriteBarrierMode mode) {
   Object* back_pointer = GetBackPointer();
-#ifdef DEBUG
-  Object* object = READ_FIELD(this, kTransitionsOrBackPointerOffset);
-  if (object->IsTransitionArray()) {
+
+  if (Heap::ShouldZapGarbage() && HasTransitionArray()) {
     ZapTransitions();
-  } else {
-    ASSERT(object->IsMap() || object->IsUndefined());
   }
-#endif
+
   WRITE_FIELD(this, kTransitionsOrBackPointerOffset, back_pointer);
   CONDITIONAL_WRITE_BARRIER(
       heap, this, kTransitionsOrBackPointerOffset, back_pointer, mode);
@@ -3547,8 +3833,8 @@ void Map::AppendDescriptor(Descriptor* desc,
                            const DescriptorArray::WhitenessWitness& witness) {
   DescriptorArray* descriptors = instance_descriptors();
   int number_of_own_descriptors = NumberOfOwnDescriptors();
-  ASSERT(number_of_own_descriptors < descriptors->number_of_descriptors());
-  descriptors->Append(desc, witness, number_of_own_descriptors);
+  ASSERT(descriptors->number_of_descriptors() == number_of_own_descriptors);
+  descriptors->Append(desc, witness);
   SetNumberOfOwnDescriptors(number_of_own_descriptors + 1);
 }
 
@@ -3588,9 +3874,11 @@ bool Map::CanHaveMoreTransitions() {
 }
 
 
-MaybeObject* Map::AddTransition(String* key, Map* target) {
+MaybeObject* Map::AddTransition(String* key,
+                                Map* target,
+                                SimpleTransitionFlag flag) {
   if (HasTransitionArray()) return transitions()->CopyInsert(key, target);
-  return TransitionArray::NewWith(key, target);
+  return TransitionArray::NewWith(flag, key, target, GetBackPointer());
 }
 
 
@@ -3599,6 +3887,11 @@ void Map::SetTransition(int transition_index, Map* target) {
 }
 
 
+Map* Map::GetTransition(int transition_index) {
+  return transitions()->GetTarget(transition_index);
+}
+
+
 MaybeObject* Map::set_elements_transition_map(Map* transitioned_map) {
   MaybeObject* allow_elements = EnsureHasTransitionArray(this);
   if (allow_elements->IsFailure()) return allow_elements;
@@ -3644,14 +3937,11 @@ TransitionArray* Map::transitions() {
 
 void Map::set_transitions(TransitionArray* transition_array,
                           WriteBarrierMode mode) {
-  transition_array->set_descriptors(instance_descriptors());
-  transition_array->set_back_pointer_storage(GetBackPointer());
-#ifdef DEBUG
-  if (HasTransitionArray()) {
-    ASSERT(transitions() != transition_array);
+  // In release mode, only run this code if verify_heap is on.
+  if (Heap::ShouldZapGarbage() && HasTransitionArray()) {
+    CHECK(transitions() != transition_array);
     ZapTransitions();
   }
-#endif
 
   WRITE_FIELD(this, kTransitionsOrBackPointerOffset, transition_array);
   CONDITIONAL_WRITE_BARRIER(
@@ -4037,7 +4327,7 @@ bool Script::HasValidSource() {
   if (!src->IsString()) return true;
   String* src_str = String::cast(src);
   if (!StringShape(src_str).IsExternal()) return true;
-  if (src_str->IsAsciiRepresentation()) {
+  if (src_str->IsOneByteRepresentation()) {
     return ExternalAsciiString::cast(src)->resource() != NULL;
   } else if (src_str->IsTwoByteRepresentation()) {
     return ExternalTwoByteString::cast(src)->resource() != NULL;
@@ -4305,42 +4595,6 @@ void JSFunction::set_initial_map(Map* value) {
 }
 
 
-MaybeObject* JSFunction::set_initial_map_and_cache_transitions(
-    Map* initial_map) {
-  Context* native_context = context()->native_context();
-  Object* array_function =
-      native_context->get(Context::ARRAY_FUNCTION_INDEX);
-  if (array_function->IsJSFunction() &&
-      this == JSFunction::cast(array_function)) {
-    // Replace all of the cached initial array maps in the native context with
-    // the appropriate transitioned elements kind maps.
-    Heap* heap = GetHeap();
-    MaybeObject* maybe_maps =
-        heap->AllocateFixedArrayWithHoles(kElementsKindCount);
-    FixedArray* maps;
-    if (!maybe_maps->To(&maps)) return maybe_maps;
-
-    Map* current_map = initial_map;
-    ElementsKind kind = current_map->elements_kind();
-    ASSERT(kind == GetInitialFastElementsKind());
-    maps->set(kind, current_map);
-    for (int i = GetSequenceIndexFromFastElementsKind(kind) + 1;
-         i < kFastElementsKindCount; ++i) {
-      Map* new_map;
-      ElementsKind next_kind = GetFastElementsKindFromSequenceIndex(i);
-      MaybeObject* maybe_new_map =
-          current_map->CopyAsElementsKind(next_kind, INSERT_TRANSITION);
-      if (!maybe_new_map->To(&new_map)) return maybe_new_map;
-      maps->set(next_kind, new_map);
-      current_map = new_map;
-    }
-    native_context->set_js_array_maps(maps);
-  }
-  set_initial_map(initial_map);
-  return this;
-}
-
-
 bool JSFunction::has_initial_map() {
   return prototype_or_initial_map()->IsMap();
 }
@@ -4532,13 +4786,49 @@ JSMessageObject* JSMessageObject::cast(Object* obj) {
 
 
 INT_ACCESSORS(Code, instruction_size, kInstructionSizeOffset)
+INT_ACCESSORS(Code, prologue_offset, kPrologueOffset)
 ACCESSORS(Code, relocation_info, ByteArray, kRelocationInfoOffset)
 ACCESSORS(Code, handler_table, FixedArray, kHandlerTableOffset)
 ACCESSORS(Code, deoptimization_data, FixedArray, kDeoptimizationDataOffset)
-ACCESSORS(Code, type_feedback_info, Object, kTypeFeedbackInfoOffset)
+
+
+// Type feedback slot: type_feedback_info for FUNCTIONs, stub_info for STUBs.
+void Code::InitializeTypeFeedbackInfoNoWriteBarrier(Object* value) {
+  WRITE_FIELD(this, kTypeFeedbackInfoOffset, value);
+}
+
+
+Object* Code::type_feedback_info() {
+  ASSERT(kind() == FUNCTION);
+  return Object::cast(READ_FIELD(this, kTypeFeedbackInfoOffset));
+}
+
+
+void Code::set_type_feedback_info(Object* value, WriteBarrierMode mode) {
+  ASSERT(kind() == FUNCTION);
+  WRITE_FIELD(this, kTypeFeedbackInfoOffset, value);
+  CONDITIONAL_WRITE_BARRIER(GetHeap(), this, kTypeFeedbackInfoOffset,
+                            value, mode);
+}
+
+
+int Code::stub_info() {
+  ASSERT(kind() == COMPARE_IC || kind() == BINARY_OP_IC);
+  Object* value = READ_FIELD(this, kTypeFeedbackInfoOffset);
+  return Smi::cast(value)->value();
+}
+
+
+void Code::set_stub_info(int value) {
+  ASSERT(kind() == COMPARE_IC || kind() == BINARY_OP_IC);
+  WRITE_FIELD(this, kTypeFeedbackInfoOffset, Smi::FromInt(value));
+}
+
+
 ACCESSORS(Code, gc_metadata, Object, kGCMetadataOffset)
 INT_ACCESSORS(Code, ic_age, kICAgeOffset)
 
+
 byte* Code::instruction_start()  {
   return FIELD_ADDR(this, kHeaderSize);
 }
@@ -4666,6 +4956,13 @@ void JSRegExp::SetDataAtUnchecked(int index, Object* value, Heap* heap) {
 }
 
 
+void JSRegExp::ResetLastIndex() {
+  InObjectPropertyAtPut(JSRegExp::kLastIndexFieldIndex,
+                        Smi::FromInt(0),
+                        SKIP_WRITE_BARRIER);  // It's a Smi.
+}
+
+
 ElementsKind JSObject::GetElementsKind() {
   ElementsKind kind = map()->elements_kind();
 #if DEBUG
@@ -4719,6 +5016,11 @@ bool JSObject::HasFastHoleyElements() {
 }
 
 
+bool JSObject::HasFastElements() {
+  return IsFastElementsKind(GetElementsKind());
+}
+
+
 bool JSObject::HasDictionaryElements() {
   return GetElementsKind() == DICTIONARY_ELEMENTS;
 }
@@ -4825,8 +5127,7 @@ StringHasher::StringHasher(int length, uint32_t seed)
     raw_running_hash_(seed),
     array_index_(0),
     is_array_index_(0 < length_ && length_ <= String::kMaxArrayIndexSize),
-    is_first_char_(true),
-    is_valid_(true) {
+    is_first_char_(true) {
   ASSERT(FLAG_randomize_hashes || raw_running_hash_ == 0);
 }
 
@@ -4836,6 +5137,25 @@ bool StringHasher::has_trivial_hash() {
 }
 
 
+uint32_t StringHasher::AddCharacterCore(uint32_t running_hash, uint32_t c) {
+  running_hash += c;
+  running_hash += (running_hash << 10);
+  running_hash ^= (running_hash >> 6);
+  return running_hash;
+}
+
+
+uint32_t StringHasher::GetHashCore(uint32_t running_hash) {
+  running_hash += (running_hash << 3);
+  running_hash ^= (running_hash >> 11);
+  running_hash += (running_hash << 15);
+  if ((running_hash & String::kHashBitMask) == 0) {
+    return kZeroHash;
+  }
+  return running_hash;
+}
+
+
 void StringHasher::AddCharacter(uint32_t c) {
   if (c > unibrow::Utf16::kMaxNonSurrogateCharCode) {
     AddSurrogatePair(c);  // Not inlined.
@@ -4843,9 +5163,7 @@ void StringHasher::AddCharacter(uint32_t c) {
   }
   // Use the Jenkins one-at-a-time hash function to update the hash
   // for the given character.
-  raw_running_hash_ += c;
-  raw_running_hash_ += (raw_running_hash_ << 10);
-  raw_running_hash_ ^= (raw_running_hash_ >> 6);
+  raw_running_hash_ = AddCharacterCore(raw_running_hash_, c);
   // Incremental array index computation.
   if (is_array_index_) {
     if (c < '0' || c > '9') {
@@ -4875,23 +5193,14 @@ void StringHasher::AddCharacterNoIndex(uint32_t c) {
     AddSurrogatePairNoIndex(c);  // Not inlined.
     return;
   }
-  raw_running_hash_ += c;
-  raw_running_hash_ += (raw_running_hash_ << 10);
-  raw_running_hash_ ^= (raw_running_hash_ >> 6);
+  raw_running_hash_ = AddCharacterCore(raw_running_hash_, c);
 }
 
 
 uint32_t StringHasher::GetHash() {
   // Get the calculated raw hash value and do some more bit ops to distribute
   // the hash further. Ensure that we never return zero as the hash value.
-  uint32_t result = raw_running_hash_;
-  result += (result << 3);
-  result ^= (result >> 11);
-  result += (result << 15);
-  if ((result & String::kHashBitMask) == 0) {
-    result = 27;
-  }
-  return result;
+  return GetHashCore(raw_running_hash_);
 }
 
 
@@ -4947,9 +5256,23 @@ bool JSReceiver::HasLocalProperty(String* name) {
 
 
 PropertyAttributes JSReceiver::GetPropertyAttribute(String* key) {
+  uint32_t index;
+  if (IsJSObject() && key->AsArrayIndex(&index)) {
+    return GetElementAttribute(index);
+  }
   return GetPropertyAttributeWithReceiver(this, key);
 }
 
+
+PropertyAttributes JSReceiver::GetElementAttribute(uint32_t index) {
+  if (IsJSProxy()) {
+    return JSProxy::cast(this)->GetElementAttributeWithHandler(this, index);
+  }
+  return JSObject::cast(this)->GetElementAttributeWithReceiver(
+      this, index, true);
+}
+
+
 // TODO(504): this may be useful in other places too where JSGlobalProxy
 // is used.
 Object* JSObject::BypassGlobalProxy() {
@@ -4974,7 +5297,26 @@ bool JSReceiver::HasElement(uint32_t index) {
   if (IsJSProxy()) {
     return JSProxy::cast(this)->HasElementWithHandler(index);
   }
-  return JSObject::cast(this)->HasElementWithReceiver(this, index);
+  return JSObject::cast(this)->GetElementAttributeWithReceiver(
+      this, index, true) != ABSENT;
+}
+
+
+bool JSReceiver::HasLocalElement(uint32_t index) {
+  if (IsJSProxy()) {
+    return JSProxy::cast(this)->HasElementWithHandler(index);
+  }
+  return JSObject::cast(this)->GetElementAttributeWithReceiver(
+      this, index, false) != ABSENT;
+}
+
+
+PropertyAttributes JSReceiver::GetLocalElementAttribute(uint32_t index) {
+  if (IsJSProxy()) {
+    return JSProxy::cast(this)->GetElementAttributeWithHandler(this, index);
+  }
+  return JSObject::cast(this)->GetElementAttributeWithReceiver(
+      this, index, false);
 }
 
 
@@ -5138,8 +5480,8 @@ void Map::ClearCodeCache(Heap* heap) {
   // Please note this function is used during marking:
   //  - MarkCompactCollector::MarkUnmarkedObject
   //  - IncrementalMarking::Step
-  ASSERT(!heap->InNewSpace(heap->raw_unchecked_empty_fixed_array()));
-  WRITE_FIELD(this, kCodeCacheOffset, heap->raw_unchecked_empty_fixed_array());
+  ASSERT(!heap->InNewSpace(heap->empty_fixed_array()));
+  WRITE_FIELD(this, kCodeCacheOffset, heap->empty_fixed_array());
 }
 
 
@@ -5233,7 +5575,7 @@ Handle<Object> TypeFeedbackCells::MegamorphicSentinel(Isolate* isolate) {
 
 
 Object* TypeFeedbackCells::RawUninitializedSentinel(Heap* heap) {
-  return heap->raw_unchecked_the_hole_value();
+  return heap->the_hole_value();
 }
 
 
diff --git a/deps/v8/src/objects-printer.cc b/deps/v8/src/objects-printer.cc
index 1ba0bb0d09..9a1a58ef82 100644
--- a/deps/v8/src/objects-printer.cc
+++ b/deps/v8/src/objects-printer.cc
@@ -254,7 +254,7 @@ void ExternalDoubleArray::ExternalDoubleArrayPrint(FILE* out) {
 void JSObject::PrintProperties(FILE* out) {
   if (HasFastProperties()) {
     DescriptorArray* descs = map()->instance_descriptors();
-    for (int i = 0; i < descs->number_of_descriptors(); i++) {
+    for (int i = 0; i < map()->NumberOfOwnDescriptors(); i++) {
       PrintF(out, "   ");
       descs->GetKey(i)->StringPrint(out);
       PrintF(out, ": ");
@@ -384,7 +384,7 @@ void JSObject::PrintElements(FILE* out) {
     case EXTERNAL_DOUBLE_ELEMENTS: {
       ExternalDoubleArray* p = ExternalDoubleArray::cast(elements());
       for (int i = 0; i < p->length(); i++) {
-        PrintF(out, "  %d: %f\n", i, p->get_scalar(i));
+        PrintF(out, "   %d: %f\n", i, p->get_scalar(i));
       }
       break;
     }
@@ -393,11 +393,16 @@ void JSObject::PrintElements(FILE* out) {
       break;
     case NON_STRICT_ARGUMENTS_ELEMENTS: {
       FixedArray* p = FixedArray::cast(elements());
+      PrintF(out, "   parameter map:");
       for (int i = 2; i < p->length(); i++) {
-        PrintF(out, "   %d: ", i);
+        PrintF(out, " %d:", i - 2);
         p->get(i)->ShortPrint(out);
-        PrintF(out, "\n");
       }
+      PrintF(out, "\n   context: ");
+      p->get(0)->ShortPrint(out);
+      PrintF(out, "\n   arguments: ");
+      p->get(1)->ShortPrint(out);
+      PrintF(out, "\n");
       break;
     }
   }
@@ -562,7 +567,11 @@ void Map::MapPrint(FILE* out) {
   if (is_access_check_needed()) {
     PrintF(out, " - access_check_needed\n");
   }
-  PrintF(out, " - instance descriptors: ");
+  PrintF(out, " - back pointer: ");
+  GetBackPointer()->ShortPrint(out);
+  PrintF(out, "\n - instance descriptors %i #%i: ",
+         owns_descriptors(),
+         NumberOfOwnDescriptors());
   instance_descriptors()->ShortPrint(out);
   if (HasTransitionArray()) {
     PrintF(out, "\n - transitions: ");
diff --git a/deps/v8/src/objects-visiting-inl.h b/deps/v8/src/objects-visiting-inl.h
index 856ae06b7b..4a9dab5caa 100644
--- a/deps/v8/src/objects-visiting-inl.h
+++ b/deps/v8/src/objects-visiting-inl.h
@@ -68,7 +68,7 @@ void StaticNewSpaceVisitor<StaticVisitor>::Initialize() {
                   SharedFunctionInfo::BodyDescriptor,
                   int>::Visit);
 
-  table_.Register(kVisitSeqAsciiString, &VisitSeqAsciiString);
+  table_.Register(kVisitSeqOneByteString, &VisitSeqOneByteString);
 
   table_.Register(kVisitSeqTwoByteString, &VisitSeqTwoByteString);
 
@@ -110,10 +110,7 @@ void StaticMarkingVisitor<StaticVisitor>::Initialize() {
                   SlicedString::BodyDescriptor,
                   void>::Visit);
 
-  table_.Register(kVisitFixedArray,
-                  &FlexibleBodyVisitor<StaticVisitor,
-                  FixedArray::BodyDescriptor,
-                  void>::Visit);
+  table_.Register(kVisitFixedArray, &FixedArrayVisitor::Visit);
 
   table_.Register(kVisitFixedDoubleArray, &DataObjectVisitor::Visit);
 
@@ -123,7 +120,7 @@ void StaticMarkingVisitor<StaticVisitor>::Initialize() {
 
   table_.Register(kVisitFreeSpace, &DataObjectVisitor::Visit);
 
-  table_.Register(kVisitSeqAsciiString, &DataObjectVisitor::Visit);
+  table_.Register(kVisitSeqOneByteString, &DataObjectVisitor::Visit);
 
   table_.Register(kVisitSeqTwoByteString, &DataObjectVisitor::Visit);
 
@@ -134,16 +131,13 @@ void StaticMarkingVisitor<StaticVisitor>::Initialize() {
                   Oddball::BodyDescriptor,
                   void>::Visit);
 
-  table_.Register(kVisitMap,
-                  &FixedBodyVisitor<StaticVisitor,
-                  Map::BodyDescriptor,
-                  void>::Visit);
+  table_.Register(kVisitMap, &VisitMap);
 
-  table_.Register(kVisitCode, &StaticVisitor::VisitCode);
+  table_.Register(kVisitCode, &VisitCode);
 
-  // Registration for kVisitSharedFunctionInfo is done by StaticVisitor.
+  table_.Register(kVisitSharedFunctionInfo, &VisitSharedFunctionInfo);
 
-  // Registration for kVisitJSFunction is done by StaticVisitor.
+  table_.Register(kVisitJSFunction, &VisitJSFunction);
 
   // Registration for kVisitJSRegExp is done by StaticVisitor.
 
@@ -217,9 +211,8 @@ void StaticMarkingVisitor<StaticVisitor>::VisitCodeTarget(
   // when they might be keeping a Context alive, or when the heap is about
   // to be serialized.
   if (FLAG_cleanup_code_caches_at_gc && target->is_inline_cache_stub()
-      && (target->ic_state() == MEGAMORPHIC || Serializer::enabled() ||
-          heap->isolate()->context_exit_happened() ||
-          target->ic_age() != heap->global_ic_age())) {
+      && (target->ic_state() == MEGAMORPHIC || heap->flush_monomorphic_ics() ||
+          Serializer::enabled() || target->ic_age() != heap->global_ic_age())) {
     IC::Clear(rinfo->pc());
     target = Code::GetCodeFromTargetAddress(rinfo->target_address());
   }
@@ -229,6 +222,17 @@ void StaticMarkingVisitor<StaticVisitor>::VisitCodeTarget(
 
 
 template<typename StaticVisitor>
+void StaticMarkingVisitor<StaticVisitor>::VisitCodeAgeSequence(
+    Heap* heap, RelocInfo* rinfo) {
+  ASSERT(RelocInfo::IsCodeAgeSequence(rinfo->rmode()));
+  Code* target = rinfo->code_age_stub();
+  ASSERT(target != NULL);
+  heap->mark_compact_collector()->RecordRelocSlot(rinfo, target);
+  StaticVisitor::MarkObject(heap, target);
+}
+
+
+template<typename StaticVisitor>
 void StaticMarkingVisitor<StaticVisitor>::VisitNativeContext(
     Map* map, HeapObject* object) {
   FixedBodyVisitor<StaticVisitor,
@@ -247,6 +251,32 @@ void StaticMarkingVisitor<StaticVisitor>::VisitNativeContext(
 
 
 template<typename StaticVisitor>
+void StaticMarkingVisitor<StaticVisitor>::VisitMap(
+    Map* map, HeapObject* object) {
+  Heap* heap = map->GetHeap();
+  Map* map_object = Map::cast(object);
+
+  // Clears the cache of ICs related to this map.
+  if (FLAG_cleanup_code_caches_at_gc) {
+    map_object->ClearCodeCache(heap);
+  }
+
+  // When map collection is enabled we have to mark through map's
+  // transitions and back pointers in a special way to make these links
+  // weak.  Only maps for subclasses of JSReceiver can have transitions.
+  STATIC_ASSERT(LAST_TYPE == LAST_JS_RECEIVER_TYPE);
+  if (FLAG_collect_maps &&
+      map_object->instance_type() >= FIRST_JS_RECEIVER_TYPE) {
+    MarkMapContents(heap, map_object);
+  } else {
+    StaticVisitor::VisitPointers(heap,
+        HeapObject::RawField(object, Map::kPointerFieldsBeginOffset),
+        HeapObject::RawField(object, Map::kPointerFieldsEndOffset));
+  }
+}
+
+
+template<typename StaticVisitor>
 void StaticMarkingVisitor<StaticVisitor>::VisitCode(
     Map* map, HeapObject* object) {
   Heap* heap = map->GetHeap();
@@ -254,11 +284,79 @@ void StaticMarkingVisitor<StaticVisitor>::VisitCode(
   if (FLAG_cleanup_code_caches_at_gc) {
     code->ClearTypeFeedbackCells(heap);
   }
+  if (FLAG_age_code && !Serializer::enabled()) {
+    code->MakeOlder(heap->mark_compact_collector()->marking_parity());
+  }
   code->CodeIterateBody<StaticVisitor>(heap);
 }
 
 
 template<typename StaticVisitor>
+void StaticMarkingVisitor<StaticVisitor>::VisitSharedFunctionInfo(
+    Map* map, HeapObject* object) {
+  Heap* heap = map->GetHeap();
+  SharedFunctionInfo* shared = SharedFunctionInfo::cast(object);
+  if (shared->ic_age() != heap->global_ic_age()) {
+    shared->ResetForNewContext(heap->global_ic_age());
+  }
+  MarkCompactCollector* collector = heap->mark_compact_collector();
+  if (collector->is_code_flushing_enabled()) {
+    if (IsFlushable(heap, shared)) {
+      // This function's code looks flushable. But we have to postpone
+      // the decision until we see all functions that point to the same
+      // SharedFunctionInfo because some of them might be optimized.
+      // That would also make the non-optimized version of the code
+      // non-flushable, because it is required for bailing out from
+      // optimized code.
+      collector->code_flusher()->AddCandidate(shared);
+      // Treat the reference to the code object weakly.
+      VisitSharedFunctionInfoWeakCode(heap, object);
+      return;
+    }
+  }
+  VisitSharedFunctionInfoStrongCode(heap, object);
+}
+
+
+template<typename StaticVisitor>
+void StaticMarkingVisitor<StaticVisitor>::VisitJSFunction(
+    Map* map, HeapObject* object) {
+  Heap* heap = map->GetHeap();
+  JSFunction* function = JSFunction::cast(object);
+  MarkCompactCollector* collector = heap->mark_compact_collector();
+  if (collector->is_code_flushing_enabled()) {
+    if (IsFlushable(heap, function)) {
+      // This function's code looks flushable. But we have to postpone
+      // the decision until we see all functions that point to the same
+      // SharedFunctionInfo because some of them might be optimized.
+      // That would also make the non-optimized version of the code
+      // non-flushable, because it is required for bailing out from
+      // optimized code.
+      collector->code_flusher()->AddCandidate(function);
+      // Visit shared function info immediately to avoid double checking
+      // of its flushability later. This is just an optimization because
+      // the shared function info would eventually be visited.
+      SharedFunctionInfo* shared = function->unchecked_shared();
+      if (StaticVisitor::MarkObjectWithoutPush(heap, shared)) {
+        StaticVisitor::MarkObject(heap, shared->map());
+        VisitSharedFunctionInfoWeakCode(heap, shared);
+      }
+      // Treat the reference to the code object weakly.
+      VisitJSFunctionWeakCode(heap, object);
+      return;
+    } else {
+      // Visit all unoptimized code objects to prevent flushing them.
+      StaticVisitor::MarkObject(heap, function->shared()->code());
+      if (function->code()->kind() == Code::OPTIMIZED_FUNCTION) {
+        MarkInlinedFunctionsCode(heap, function->code());
+      }
+    }
+  }
+  VisitJSFunctionStrongCode(heap, object);
+}
+
+
+template<typename StaticVisitor>
 void StaticMarkingVisitor<StaticVisitor>::VisitJSRegExp(
     Map* map, HeapObject* object) {
   int last_property_offset =
@@ -269,6 +367,260 @@ void StaticMarkingVisitor<StaticVisitor>::VisitJSRegExp(
 }
 
 
+template<typename StaticVisitor>
+void StaticMarkingVisitor<StaticVisitor>::MarkMapContents(
+    Heap* heap, Map* map) {
+  // Make sure that the back pointer stored either in the map itself or
+  // inside its transitions array is marked. Skip recording the back
+  // pointer slot since map space is not compacted.
+  StaticVisitor::MarkObject(heap, HeapObject::cast(map->GetBackPointer()));
+
+  // Treat pointers in the transitions array as weak and also mark that
+  // array to prevent visiting it later. Skip recording the transition
+  // array slot, since it will be implicitly recorded when the pointer
+  // fields of this map are visited.
+  TransitionArray* transitions = map->unchecked_transition_array();
+  if (transitions->IsTransitionArray()) {
+    MarkTransitionArray(heap, transitions);
+  } else {
+    // Already marked by marking map->GetBackPointer() above.
+    ASSERT(transitions->IsMap() || transitions->IsUndefined());
+  }
+
+  // Mark the pointer fields of the Map. Since the transitions array has
+  // been marked already, it is fine that one of these fields contains a
+  // pointer to it.
+  StaticVisitor::VisitPointers(heap,
+      HeapObject::RawField(map, Map::kPointerFieldsBeginOffset),
+      HeapObject::RawField(map, Map::kPointerFieldsEndOffset));
+}
+
+
+template<typename StaticVisitor>
+void StaticMarkingVisitor<StaticVisitor>::MarkTransitionArray(
+    Heap* heap, TransitionArray* transitions) {
+  if (!StaticVisitor::MarkObjectWithoutPush(heap, transitions)) return;
+
+  // Simple transitions do not have keys nor prototype transitions.
+  if (transitions->IsSimpleTransition()) return;
+
+  if (transitions->HasPrototypeTransitions()) {
+    // Mark prototype transitions array but do not push it onto marking
+    // stack, this will make references from it weak. We will clean dead
+    // prototype transitions in ClearNonLiveTransitions.
+    Object** slot = transitions->GetPrototypeTransitionsSlot();
+    HeapObject* obj = HeapObject::cast(*slot);
+    heap->mark_compact_collector()->RecordSlot(slot, slot, obj);
+    StaticVisitor::MarkObjectWithoutPush(heap, obj);
+  }
+
+  for (int i = 0; i < transitions->number_of_transitions(); ++i) {
+    StaticVisitor::VisitPointer(heap, transitions->GetKeySlot(i));
+  }
+}
+
+
+template<typename StaticVisitor>
+void StaticMarkingVisitor<StaticVisitor>::MarkInlinedFunctionsCode(
+    Heap* heap, Code* code) {
+  // For optimized functions we should retain both non-optimized version
+  // of its code and non-optimized version of all inlined functions.
+  // This is required to support bailing out from inlined code.
+  DeoptimizationInputData* data =
+      DeoptimizationInputData::cast(code->deoptimization_data());
+  FixedArray* literals = data->LiteralArray();
+  for (int i = 0, count = data->InlinedFunctionCount()->value();
+       i < count;
+       i++) {
+    JSFunction* inlined = JSFunction::cast(literals->get(i));
+    StaticVisitor::MarkObject(heap, inlined->shared()->code());
+  }
+}
+
+
+inline static bool IsValidNonBuiltinContext(Object* context) {
+  return context->IsContext() &&
+      !Context::cast(context)->global_object()->IsJSBuiltinsObject();
+}
+
+
+inline static bool HasSourceCode(Heap* heap, SharedFunctionInfo* info) {
+  Object* undefined = heap->undefined_value();
+  return (info->script() != undefined) &&
+      (reinterpret_cast<Script*>(info->script())->source() != undefined);
+}
+
+
+template<typename StaticVisitor>
+bool StaticMarkingVisitor<StaticVisitor>::IsFlushable(
+    Heap* heap, JSFunction* function) {
+  SharedFunctionInfo* shared_info = function->unchecked_shared();
+
+  // Code is either on stack, in compilation cache or referenced
+  // by optimized version of function.
+  MarkBit code_mark = Marking::MarkBitFrom(function->code());
+  if (code_mark.Get()) {
+    if (!FLAG_age_code) {
+      if (!Marking::MarkBitFrom(shared_info).Get()) {
+        shared_info->set_code_age(0);
+      }
+    }
+    return false;
+  }
+
+  // The function must have a valid context and not be a builtin.
+  if (!IsValidNonBuiltinContext(function->unchecked_context())) {
+    return false;
+  }
+
+  // We do not (yet) flush code for optimized functions.
+  if (function->code() != shared_info->code()) {
+    return false;
+  }
+
+  // Check age of optimized code.
+  if (FLAG_age_code && !function->code()->IsOld()) {
+    return false;
+  }
+
+  return IsFlushable(heap, shared_info);
+}
+
+
+template<typename StaticVisitor>
+bool StaticMarkingVisitor<StaticVisitor>::IsFlushable(
+    Heap* heap, SharedFunctionInfo* shared_info) {
+  // Code is either on stack, in compilation cache or referenced
+  // by optimized version of function.
+  MarkBit code_mark = Marking::MarkBitFrom(shared_info->code());
+  if (code_mark.Get()) {
+    return false;
+  }
+
+  // The function must be compiled and have the source code available,
+  // to be able to recompile it in case we need the function again.
+  if (!(shared_info->is_compiled() && HasSourceCode(heap, shared_info))) {
+    return false;
+  }
+
+  // We never flush code for API functions.
+  Object* function_data = shared_info->function_data();
+  if (function_data->IsFunctionTemplateInfo()) {
+    return false;
+  }
+
+  // Only flush code for functions.
+  if (shared_info->code()->kind() != Code::FUNCTION) {
+    return false;
+  }
+
+  // Function must be lazy compilable.
+  if (!shared_info->allows_lazy_compilation()) {
+    return false;
+  }
+
+  // If this is a full script wrapped in a function we do no flush the code.
+  if (shared_info->is_toplevel()) {
+    return false;
+  }
+
+  if (FLAG_age_code) {
+    return shared_info->code()->IsOld();
+  } else {
+    // How many collections newly compiled code object will survive before being
+    // flushed.
+    static const int kCodeAgeThreshold = 5;
+
+    // Age this shared function info.
+    if (shared_info->code_age() < kCodeAgeThreshold) {
+      shared_info->set_code_age(shared_info->code_age() + 1);
+      return false;
+    }
+    return true;
+  }
+}
+
+
+template<typename StaticVisitor>
+void StaticMarkingVisitor<StaticVisitor>::VisitSharedFunctionInfoStrongCode(
+    Heap* heap, HeapObject* object) {
+  StaticVisitor::BeforeVisitingSharedFunctionInfo(object);
+  Object** start_slot =
+      HeapObject::RawField(object,
+                           SharedFunctionInfo::BodyDescriptor::kStartOffset);
+  Object** end_slot =
+      HeapObject::RawField(object,
+                           SharedFunctionInfo::BodyDescriptor::kEndOffset);
+  StaticVisitor::VisitPointers(heap, start_slot, end_slot);
+}
+
+
+template<typename StaticVisitor>
+void StaticMarkingVisitor<StaticVisitor>::VisitSharedFunctionInfoWeakCode(
+    Heap* heap, HeapObject* object) {
+  StaticVisitor::BeforeVisitingSharedFunctionInfo(object);
+  Object** name_slot =
+      HeapObject::RawField(object, SharedFunctionInfo::kNameOffset);
+  StaticVisitor::VisitPointer(heap, name_slot);
+
+  // Skip visiting kCodeOffset as it is treated weakly here.
+  STATIC_ASSERT(SharedFunctionInfo::kNameOffset + kPointerSize ==
+      SharedFunctionInfo::kCodeOffset);
+  STATIC_ASSERT(SharedFunctionInfo::kCodeOffset + kPointerSize ==
+      SharedFunctionInfo::kOptimizedCodeMapOffset);
+
+  Object** start_slot =
+      HeapObject::RawField(object,
+                           SharedFunctionInfo::kOptimizedCodeMapOffset);
+  Object** end_slot =
+      HeapObject::RawField(object,
+                           SharedFunctionInfo::BodyDescriptor::kEndOffset);
+  StaticVisitor::VisitPointers(heap, start_slot, end_slot);
+}
+
+
+template<typename StaticVisitor>
+void StaticMarkingVisitor<StaticVisitor>::VisitJSFunctionStrongCode(
+    Heap* heap, HeapObject* object) {
+  Object** start_slot =
+      HeapObject::RawField(object, JSFunction::kPropertiesOffset);
+  Object** end_slot =
+      HeapObject::RawField(object, JSFunction::kCodeEntryOffset);
+  StaticVisitor::VisitPointers(heap, start_slot, end_slot);
+
+  VisitCodeEntry(heap, object->address() + JSFunction::kCodeEntryOffset);
+  STATIC_ASSERT(JSFunction::kCodeEntryOffset + kPointerSize ==
+      JSFunction::kPrototypeOrInitialMapOffset);
+
+  start_slot =
+      HeapObject::RawField(object, JSFunction::kPrototypeOrInitialMapOffset);
+  end_slot =
+      HeapObject::RawField(object, JSFunction::kNonWeakFieldsEndOffset);
+  StaticVisitor::VisitPointers(heap, start_slot, end_slot);
+}
+
+
+template<typename StaticVisitor>
+void StaticMarkingVisitor<StaticVisitor>::VisitJSFunctionWeakCode(
+    Heap* heap, HeapObject* object) {
+  Object** start_slot =
+      HeapObject::RawField(object, JSFunction::kPropertiesOffset);
+  Object** end_slot =
+      HeapObject::RawField(object, JSFunction::kCodeEntryOffset);
+  StaticVisitor::VisitPointers(heap, start_slot, end_slot);
+
+  // Skip visiting kCodeEntryOffset as it is treated weakly here.
+  STATIC_ASSERT(JSFunction::kCodeEntryOffset + kPointerSize ==
+      JSFunction::kPrototypeOrInitialMapOffset);
+
+  start_slot =
+      HeapObject::RawField(object, JSFunction::kPrototypeOrInitialMapOffset);
+  end_slot =
+      HeapObject::RawField(object, JSFunction::kNonWeakFieldsEndOffset);
+  StaticVisitor::VisitPointers(heap, start_slot, end_slot);
+}
+
+
 void Code::CodeIterateBody(ObjectVisitor* v) {
   int mode_mask = RelocInfo::kCodeTargetMask |
                   RelocInfo::ModeMask(RelocInfo::EMBEDDED_OBJECT) |
diff --git a/deps/v8/src/objects-visiting.cc b/deps/v8/src/objects-visiting.cc
index a2dc43e247..7082e59f35 100644
--- a/deps/v8/src/objects-visiting.cc
+++ b/deps/v8/src/objects-visiting.cc
@@ -45,8 +45,8 @@ StaticVisitorBase::VisitorId StaticVisitorBase::GetVisitorId(
   if (instance_type < FIRST_NONSTRING_TYPE) {
     switch (instance_type & kStringRepresentationMask) {
       case kSeqStringTag:
-        if ((instance_type & kStringEncodingMask) == kAsciiStringTag) {
-          return kVisitSeqAsciiString;
+        if ((instance_type & kStringEncodingMask) == kOneByteStringTag) {
+          return kVisitSeqOneByteString;
         } else {
           return kVisitSeqTwoByteString;
         }
diff --git a/deps/v8/src/objects-visiting.h b/deps/v8/src/objects-visiting.h
index 76a0f74e86..29f3cbc598 100644
--- a/deps/v8/src/objects-visiting.h
+++ b/deps/v8/src/objects-visiting.h
@@ -47,7 +47,7 @@ namespace internal {
 class StaticVisitorBase : public AllStatic {
  public:
 #define VISITOR_ID_LIST(V)    \
-  V(SeqAsciiString)           \
+  V(SeqOneByteString)           \
   V(SeqTwoByteString)         \
   V(ShortcutCandidate)        \
   V(ByteArray)                \
@@ -318,9 +318,9 @@ class StaticNewSpaceVisitor : public StaticVisitorBase {
     return JSObjectVisitor::Visit(map, object);
   }
 
-  static inline int VisitSeqAsciiString(Map* map, HeapObject* object) {
-    return SeqAsciiString::cast(object)->
-        SeqAsciiStringSize(map->instance_type());
+  static inline int VisitSeqOneByteString(Map* map, HeapObject* object) {
+    return SeqOneByteString::cast(object)->
+        SeqOneByteStringSize(map->instance_type());
   }
 
   static inline int VisitSeqTwoByteString(Map* map, HeapObject* object) {
@@ -391,15 +391,38 @@ class StaticMarkingVisitor : public StaticVisitorBase {
   static inline void VisitGlobalPropertyCell(Heap* heap, RelocInfo* rinfo);
   static inline void VisitDebugTarget(Heap* heap, RelocInfo* rinfo);
   static inline void VisitCodeTarget(Heap* heap, RelocInfo* rinfo);
+  static inline void VisitCodeAgeSequence(Heap* heap, RelocInfo* rinfo);
   static inline void VisitExternalReference(RelocInfo* rinfo) { }
   static inline void VisitRuntimeEntry(RelocInfo* rinfo) { }
 
   // TODO(mstarzinger): This should be made protected once refactoring is done.
-  static inline void VisitNativeContext(Map* map, HeapObject* object);
+  // Mark non-optimize code for functions inlined into the given optimized
+  // code. This will prevent it from being flushed.
+  static void MarkInlinedFunctionsCode(Heap* heap, Code* code);
 
  protected:
+  static inline void VisitMap(Map* map, HeapObject* object);
   static inline void VisitCode(Map* map, HeapObject* object);
+  static inline void VisitSharedFunctionInfo(Map* map, HeapObject* object);
+  static inline void VisitJSFunction(Map* map, HeapObject* object);
   static inline void VisitJSRegExp(Map* map, HeapObject* object);
+  static inline void VisitNativeContext(Map* map, HeapObject* object);
+
+  // Mark pointers in a Map and its TransitionArray together, possibly
+  // treating transitions or back pointers weak.
+  static void MarkMapContents(Heap* heap, Map* map);
+  static void MarkTransitionArray(Heap* heap, TransitionArray* transitions);
+
+  // Code flushing support.
+  static inline bool IsFlushable(Heap* heap, JSFunction* function);
+  static inline bool IsFlushable(Heap* heap, SharedFunctionInfo* shared_info);
+
+  // Helpers used by code flushing support that visit pointer fields and treat
+  // references to code objects either strongly or weakly.
+  static void VisitSharedFunctionInfoStrongCode(Heap* heap, HeapObject* object);
+  static void VisitSharedFunctionInfoWeakCode(Heap* heap, HeapObject* object);
+  static void VisitJSFunctionStrongCode(Heap* heap, HeapObject* object);
+  static void VisitJSFunctionWeakCode(Heap* heap, HeapObject* object);
 
   class DataObjectVisitor {
    public:
@@ -412,6 +435,10 @@ class StaticMarkingVisitor : public StaticVisitorBase {
   };
 
   typedef FlexibleBodyVisitor<StaticVisitor,
+                              FixedArray::BodyDescriptor,
+                              void> FixedArrayVisitor;
+
+  typedef FlexibleBodyVisitor<StaticVisitor,
                               JSObject::BodyDescriptor,
                               void> JSObjectVisitor;
 
diff --git a/deps/v8/src/objects.cc b/deps/v8/src/objects.cc
index 254cd26f57..fcc2efad31 100644
--- a/deps/v8/src/objects.cc
+++ b/deps/v8/src/objects.cc
@@ -27,6 +27,7 @@
 
 #include "v8.h"
 
+#include "accessors.h"
 #include "api.h"
 #include "arguments.h"
 #include "bootstrapper.h"
@@ -247,6 +248,18 @@ MaybeObject* JSProxy::GetPropertyWithHandler(Object* receiver_raw,
 }
 
 
+Handle<Object> Object::GetProperty(Handle<Object> object, Handle<String> name) {
+  // TODO(rossberg): The index test should not be here but in the GetProperty
+  // method (or somewhere else entirely). Needs more global clean-up.
+  uint32_t index;
+  if (name->AsArrayIndex(&index)) return GetElement(object, index);
+  Isolate* isolate = object->IsHeapObject()
+      ? Handle<HeapObject>::cast(object)->GetIsolate()
+      : Isolate::Current();
+  CALL_HEAP_FUNCTION(isolate, object->GetProperty(*name), Object);
+}
+
+
 Handle<Object> Object::GetElement(Handle<Object> object, uint32_t index) {
   Isolate* isolate = object->IsHeapObject()
       ? Handle<HeapObject>::cast(object)->GetIsolate()
@@ -641,7 +654,8 @@ MaybeObject* Object::GetProperty(Object* receiver,
       ASSERT(!value->IsTheHole() || result->IsReadOnly());
       return value->IsTheHole() ? heap->undefined_value() : value;
     case FIELD:
-      value = result->holder()->FastPropertyAt(result->GetFieldIndex());
+      value = result->holder()->FastPropertyAt(
+          result->GetFieldIndex().field_index());
       ASSERT(!value->IsTheHole() || result->IsReadOnly());
       return value->IsTheHole() ? heap->undefined_value() : value;
     case CONSTANT_FUNCTION:
@@ -881,14 +895,15 @@ MaybeObject* String::SlowTryFlatten(PretenureFlag pretenure) {
       int len = length();
       Object* object;
       String* result;
-      if (IsAsciiRepresentation()) {
-        { MaybeObject* maybe_object = heap->AllocateRawAsciiString(len, tenure);
+      if (IsOneByteRepresentation()) {
+        { MaybeObject* maybe_object =
+              heap->AllocateRawOneByteString(len, tenure);
           if (!maybe_object->ToObject(&object)) return maybe_object;
         }
         result = String::cast(object);
         String* first = cs->first();
         int first_length = first->length();
-        char* dest = SeqAsciiString::cast(result)->GetChars();
+        char* dest = SeqOneByteString::cast(result)->GetChars();
         WriteToFlat(first, dest, 0, first_length);
         String* second = cs->second();
         WriteToFlat(second,
@@ -941,7 +956,7 @@ bool String::MakeExternal(v8::String::ExternalStringResource* resource) {
   if (size < ExternalString::kShortSize) {
     return false;
   }
-  bool is_ascii = this->IsAsciiRepresentation();
+  bool is_ascii = this->IsOneByteRepresentation();
   bool is_symbol = this->IsSymbol();
 
   // Morph the object to an external string by adjusting the map and
@@ -1118,6 +1133,10 @@ void JSObject::JSObjectShortPrint(StringStream* accumulator) {
       }
       break;
     }
+    case JS_MODULE_TYPE: {
+      accumulator->Add("<JS Module>");
+      break;
+    }
     // All other JSObjects are rather similar to each other (JSObject,
     // JSGlobalProxy, JSGlobalObject, JSUndetectableObject, JSValue).
     default: {
@@ -1340,7 +1359,7 @@ void HeapObject::IterateBody(InstanceType type, int object_size,
         SlicedString::BodyDescriptor::IterateBody(this, v);
         break;
       case kExternalStringTag:
-        if ((type & kStringEncodingMask) == kAsciiStringTag) {
+        if ((type & kStringEncodingMask) == kOneByteStringTag) {
           reinterpret_cast<ExternalAsciiString*>(this)->
               ExternalAsciiStringIterateBody(v);
         } else {
@@ -1539,8 +1558,9 @@ MaybeObject* JSObject::AddFastProperty(String* name,
                                        PropertyAttributes attributes,
                                        StoreFromKeyed store_mode) {
   ASSERT(!IsJSGlobalProxy());
-  ASSERT(map()->instance_descriptors()->Search(name) ==
-         DescriptorArray::kNotFound);
+  ASSERT(DescriptorArray::kNotFound ==
+         map()->instance_descriptors()->Search(
+             name, map()->NumberOfOwnDescriptors()));
 
   // Normalize the object if the name is an actual string (not the
   // hidden symbols) and is not a real identifier.
@@ -1676,39 +1696,88 @@ MaybeObject* JSObject::AddProperty(String* name,
   ASSERT(!IsJSGlobalProxy());
   Map* map_of_this = map();
   Heap* heap = GetHeap();
+  Isolate* isolate = heap->isolate();
+  MaybeObject* result;
   if (extensibility_check == PERFORM_EXTENSIBILITY_CHECK &&
       !map_of_this->is_extensible()) {
     if (strict_mode == kNonStrictMode) {
       return value;
     } else {
       Handle<Object> args[1] = {Handle<String>(name)};
-      return heap->isolate()->Throw(
+      return isolate->Throw(
           *FACTORY->NewTypeError("object_not_extensible",
                                  HandleVector(args, 1)));
     }
   }
+
   if (HasFastProperties()) {
     // Ensure the descriptor array does not get too big.
-    if (map_of_this->instance_descriptors()->number_of_descriptors() <
+    if (map_of_this->NumberOfOwnDescriptors() <
         DescriptorArray::kMaxNumberOfDescriptors) {
       if (value->IsJSFunction()) {
-        return AddConstantFunctionProperty(name,
-                                           JSFunction::cast(value),
-                                           attributes);
+        result = AddConstantFunctionProperty(name,
+                                             JSFunction::cast(value),
+                                             attributes);
       } else {
-        return AddFastProperty(name, value, attributes, store_mode);
+        result = AddFastProperty(name, value, attributes, store_mode);
       }
     } else {
       // Normalize the object to prevent very large instance descriptors.
       // This eliminates unwanted N^2 allocation and lookup behavior.
       Object* obj;
-      { MaybeObject* maybe_obj =
-            NormalizeProperties(CLEAR_INOBJECT_PROPERTIES, 0);
-        if (!maybe_obj->ToObject(&obj)) return maybe_obj;
-      }
+      MaybeObject* maybe = NormalizeProperties(CLEAR_INOBJECT_PROPERTIES, 0);
+      if (!maybe->To(&obj)) return maybe;
+      result = AddSlowProperty(name, value, attributes);
     }
+  } else {
+    result = AddSlowProperty(name, value, attributes);
   }
-  return AddSlowProperty(name, value, attributes);
+
+  Handle<Object> hresult;
+  if (!result->ToHandle(&hresult, isolate)) return result;
+
+  if (FLAG_harmony_observation && map()->is_observed()) {
+    EnqueueChangeRecord(handle(this, isolate),
+                        "new",
+                        handle(name, isolate),
+                        handle(heap->the_hole_value(), isolate));
+  }
+
+  return *hresult;
+}
+
+
+void JSObject::EnqueueChangeRecord(Handle<JSObject> object,
+                                   const char* type_str,
+                                   Handle<String> name,
+                                   Handle<Object> old_value) {
+  Isolate* isolate = object->GetIsolate();
+  HandleScope scope;
+  Handle<String> type = isolate->factory()->LookupAsciiSymbol(type_str);
+  if (object->IsJSGlobalObject()) {
+    object = handle(JSGlobalObject::cast(*object)->global_receiver(), isolate);
+  }
+  Handle<Object> args[] = { type, object, name, old_value };
+  bool threw;
+  Execution::Call(Handle<JSFunction>(isolate->observers_notify_change()),
+                  Handle<Object>(isolate->heap()->undefined_value()),
+                  old_value->IsTheHole() ? 3 : 4, args,
+                  &threw);
+  ASSERT(!threw);
+}
+
+
+void JSObject::DeliverChangeRecords(Isolate* isolate) {
+  ASSERT(isolate->observer_delivery_pending());
+  bool threw = false;
+  Execution::Call(
+      isolate->observers_deliver_changes(),
+      isolate->factory()->undefined_value(),
+      0,
+      NULL,
+      &threw);
+  ASSERT(!threw);
+  isolate->set_observer_delivery_pending(false);
 }
 
 
@@ -1760,6 +1829,7 @@ MaybeObject* JSObject::ConvertTransitionToMapTransition(
     Object* new_value,
     PropertyAttributes attributes) {
   Map* old_map = map();
+  Map* old_target = old_map->GetTransition(transition_index);
   Object* result;
 
   MaybeObject* maybe_result =
@@ -1770,13 +1840,35 @@ MaybeObject* JSObject::ConvertTransitionToMapTransition(
 
   // This method should only be used to convert existing transitions. Objects
   // with the map of "new Object()" cannot have transitions in the first place.
-  ASSERT(map() != GetIsolate()->empty_object_map());
+  Map* new_map = map();
+  ASSERT(new_map != GetIsolate()->empty_object_map());
 
   // TODO(verwaest): From here on we lose existing map transitions, causing
   // invalid back pointers. This will change once we can store multiple
   // transitions with the same key.
-  old_map->SetTransition(transition_index, map());
-  map()->SetBackPointer(old_map);
+
+  bool owned_descriptors = old_map->owns_descriptors();
+  if (owned_descriptors ||
+      old_target->instance_descriptors() == old_map->instance_descriptors()) {
+    // Since the conversion above generated a new fast map with an additional
+    // property which can be shared as well, install this descriptor pointer
+    // along the entire chain of smaller maps.
+    Map* map;
+    DescriptorArray* new_descriptors = new_map->instance_descriptors();
+    DescriptorArray* old_descriptors = old_map->instance_descriptors();
+    for (Object* current = old_map;
+         !current->IsUndefined();
+         current = map->GetBackPointer()) {
+      map = Map::cast(current);
+      if (map->instance_descriptors() != old_descriptors) break;
+      map->SetEnumLength(Map::kInvalidEnumCache);
+      map->set_instance_descriptors(new_descriptors);
+    }
+    old_map->set_owns_descriptors(false);
+  }
+
+  old_map->SetTransition(transition_index, new_map);
+  new_map->SetBackPointer(old_map);
   return result;
 }
 
@@ -1883,7 +1975,7 @@ MaybeObject* JSReceiver::SetProperty(String* name,
                                      StrictModeFlag strict_mode,
                                      JSReceiver::StoreFromKeyed store_mode) {
   LookupResult result(GetIsolate());
-  LocalLookup(name, &result);
+  LocalLookup(name, &result, true);
   if (!result.IsFound()) {
     map()->LookupTransition(JSObject::cast(this), name, &result);
   }
@@ -2100,11 +2192,13 @@ enum RightTrimMode { FROM_GC, FROM_MUTATOR };
 static void ZapEndOfFixedArray(Address new_end, int to_trim) {
   // If we are doing a big trim in old space then we zap the space.
   Object** zap = reinterpret_cast<Object**>(new_end);
+  zap++;  // Header of filler must be at least one word so skip that.
   for (int i = 1; i < to_trim; i++) {
     *zap++ = Smi::FromInt(0);
   }
 }
 
+
 template<RightTrimMode trim_mode>
 static void RightTrimFixedArray(Heap* heap, FixedArray* elms, int to_trim) {
   ASSERT(elms->map() != HEAP->fixed_cow_array_map());
@@ -2117,12 +2211,8 @@ static void RightTrimFixedArray(Heap* heap, FixedArray* elms, int to_trim) {
 
   Address new_end = elms->address() + FixedArray::SizeFor(len - to_trim);
 
-  if (trim_mode == FROM_GC) {
-#ifdef DEBUG
-    ZapEndOfFixedArray(new_end, to_trim);
-#endif
-  } else {
-    ZapEndOfFixedArray(new_end, to_trim);
+  if (trim_mode != FROM_GC || Heap::ShouldZapGarbage()) {
+      ZapEndOfFixedArray(new_end, to_trim);
   }
 
   int size_delta = to_trim * kPointerSize;
@@ -2145,13 +2235,31 @@ static void RightTrimFixedArray(Heap* heap, FixedArray* elms, int to_trim) {
 }
 
 
-void Map::CopyAppendCallbackDescriptors(Handle<Map> map,
-                                        Handle<Object> descriptors) {
+void Map::EnsureDescriptorSlack(Handle<Map> map, int slack) {
+  Handle<DescriptorArray> descriptors(map->instance_descriptors());
+  if (slack <= descriptors->NumberOfSlackDescriptors()) return;
+  int number_of_descriptors = descriptors->number_of_descriptors();
+  Isolate* isolate = map->GetIsolate();
+  Handle<DescriptorArray> new_descriptors =
+      isolate->factory()->NewDescriptorArray(number_of_descriptors, slack);
+  DescriptorArray::WhitenessWitness witness(*new_descriptors);
+
+  for (int i = 0; i < number_of_descriptors; ++i) {
+    new_descriptors->CopyFrom(i, *descriptors, i, witness);
+  }
+
+  map->set_instance_descriptors(*new_descriptors);
+}
+
+
+void Map::AppendCallbackDescriptors(Handle<Map> map,
+                                    Handle<Object> descriptors) {
   Isolate* isolate = map->GetIsolate();
   Handle<DescriptorArray> array(map->instance_descriptors());
-  v8::NeanderArray callbacks(descriptors);
+  NeanderArray callbacks(descriptors);
   int nof_callbacks = callbacks.length();
-  int descriptor_count = array->number_of_descriptors();
+
+  ASSERT(array->NumberOfSlackDescriptors() >= nof_callbacks);
 
   // Ensure the keys are symbols before writing them into the instance
   // descriptor. Since it may cause a GC, it has to be done before we
@@ -2164,23 +2272,7 @@ void Map::CopyAppendCallbackDescriptors(Handle<Map> map,
     entry->set_name(*key);
   }
 
-  Handle<DescriptorArray> result =
-      isolate->factory()->NewDescriptorArray(descriptor_count + nof_callbacks);
-
-  // Ensure that marking will not progress and change color of objects.
-  DescriptorArray::WhitenessWitness witness(*result);
-
-  // Copy the descriptors from the array.
-  if (0 < descriptor_count) {
-    for (int i = 0; i < descriptor_count; i++) {
-      result->CopyFrom(i, *array, i, witness);
-    }
-  }
-
-  // After this point the GC is not allowed to run anymore until the map is in a
-  // consistent state again, i.e., all the descriptors are appended and the
-  // descriptor array is trimmed to the right size.
-  Map::SetDescriptors(map, result);
+  int nof = map->NumberOfOwnDescriptors();
 
   // Fill in new callback descriptors.  Process the callbacks from
   // back to front so that the last callback with a given name takes
@@ -2189,26 +2281,14 @@ void Map::CopyAppendCallbackDescriptors(Handle<Map> map,
     AccessorInfo* entry = AccessorInfo::cast(callbacks.get(i));
     String* key = String::cast(entry->name());
     // Check if a descriptor with this name already exists before writing.
-    if (LinearSearch(*result, key, map->NumberOfOwnDescriptors()) ==
-        DescriptorArray::kNotFound) {
+    if (array->Search(key, nof) == DescriptorArray::kNotFound) {
       CallbacksDescriptor desc(key, entry, entry->property_attributes());
-      map->AppendDescriptor(&desc, witness);
+      array->Append(&desc);
+      nof += 1;
     }
   }
 
-  int new_number_of_descriptors = map->NumberOfOwnDescriptors();
-  // Reinstall the original descriptor array if no new elements were added.
-  if (new_number_of_descriptors == descriptor_count) {
-    Map::SetDescriptors(map, array);
-    return;
-  }
-
-  // If duplicates were detected, trim the descriptor array to the right size.
-  int new_array_size = DescriptorArray::LengthFor(new_number_of_descriptors);
-  if (new_array_size < result->length()) {
-    RightTrimFixedArray<FROM_MUTATOR>(
-        isolate->heap(), *result, result->length() - new_array_size);
-  }
+  map->SetNumberOfOwnDescriptors(nof);
 }
 
 
@@ -2381,7 +2461,7 @@ void JSObject::LocalLookupRealNamedProperty(String* name,
     // occur as fields.
     if (result->IsField() &&
         result->IsReadOnly() &&
-        FastPropertyAt(result->GetFieldIndex())->IsTheHole()) {
+        FastPropertyAt(result->GetFieldIndex().field_index())->IsTheHole()) {
       result->DisallowCaching();
     }
     return;
@@ -2721,12 +2801,14 @@ MUST_USE_RESULT PropertyAttributes JSProxy::GetPropertyAttributeWithHandler(
 
 
 MUST_USE_RESULT PropertyAttributes JSProxy::GetElementAttributeWithHandler(
-    JSReceiver* receiver,
+    JSReceiver* receiver_raw,
     uint32_t index) {
   Isolate* isolate = GetIsolate();
   HandleScope scope(isolate);
+  Handle<JSProxy> proxy(this);
+  Handle<JSReceiver> receiver(receiver_raw);
   Handle<String> name = isolate->factory()->Uint32ToString(index);
-  return GetPropertyAttributeWithHandler(receiver, *name);
+  return proxy->GetPropertyAttributeWithHandler(*receiver, *name);
 }
 
 
@@ -2782,13 +2864,22 @@ MUST_USE_RESULT Handle<Object> JSProxy::CallTrap(const char* name,
 }
 
 
-MaybeObject* JSObject::SetPropertyForResult(LookupResult* result,
+void JSObject::AddFastPropertyUsingMap(Handle<JSObject> object,
+                                       Handle<Map> map) {
+  CALL_HEAP_FUNCTION_VOID(
+      object->GetIsolate(),
+      object->AddFastPropertyUsingMap(*map));
+}
+
+
+MaybeObject* JSObject::SetPropertyForResult(LookupResult* lookup,
                                             String* name_raw,
                                             Object* value_raw,
                                             PropertyAttributes attributes,
                                             StrictModeFlag strict_mode,
                                             StoreFromKeyed store_mode) {
   Heap* heap = GetHeap();
+  Isolate* isolate = heap->isolate();
   // Make sure that the top context does not change when doing callbacks or
   // interceptor calls.
   AssertNoContextChange ncc;
@@ -2807,9 +2898,9 @@ MaybeObject* JSObject::SetPropertyForResult(LookupResult* result,
 
   // Check access rights if needed.
   if (IsAccessCheckNeeded()) {
-    if (!heap->isolate()->MayNamedAccess(this, name_raw, v8::ACCESS_SET)) {
+    if (!isolate->MayNamedAccess(this, name_raw, v8::ACCESS_SET)) {
       return SetPropertyWithFailedAccessCheck(
-          result, name_raw, value_raw, true, strict_mode);
+          lookup, name_raw, value_raw, true, strict_mode);
     }
   }
 
@@ -2818,66 +2909,78 @@ MaybeObject* JSObject::SetPropertyForResult(LookupResult* result,
     if (proto->IsNull()) return value_raw;
     ASSERT(proto->IsJSGlobalObject());
     return JSObject::cast(proto)->SetPropertyForResult(
-        result, name_raw, value_raw, attributes, strict_mode, store_mode);
+        lookup, name_raw, value_raw, attributes, strict_mode, store_mode);
   }
 
   // From this point on everything needs to be handlified, because
   // SetPropertyViaPrototypes might call back into JavaScript.
-  HandleScope scope(GetIsolate());
+  HandleScope scope(isolate);
   Handle<JSObject> self(this);
   Handle<String> name(name_raw);
-  Handle<Object> value(value_raw);
+  Handle<Object> value(value_raw, isolate);
 
-  if (!result->IsProperty() && !self->IsJSContextExtensionObject()) {
+  if (!lookup->IsProperty() && !self->IsJSContextExtensionObject()) {
     bool done = false;
     MaybeObject* result_object = self->SetPropertyViaPrototypes(
         *name, *value, attributes, strict_mode, &done);
     if (done) return result_object;
   }
 
-  if (!result->IsFound()) {
+  if (!lookup->IsFound()) {
     // Neither properties nor transitions found.
     return self->AddProperty(
         *name, *value, attributes, strict_mode, store_mode);
   }
-  if (result->IsProperty() && result->IsReadOnly()) {
+
+  if (lookup->IsProperty() && lookup->IsReadOnly()) {
     if (strict_mode == kStrictMode) {
       Handle<Object> args[] = { name, self };
-      return heap->isolate()->Throw(*heap->isolate()->factory()->NewTypeError(
+      return isolate->Throw(*isolate->factory()->NewTypeError(
           "strict_read_only_property", HandleVector(args, ARRAY_SIZE(args))));
     } else {
       return *value;
     }
   }
 
+  Handle<Object> old_value(heap->the_hole_value(), isolate);
+  if (FLAG_harmony_observation && map()->is_observed()) {
+    old_value = handle(lookup->GetLazyValue(), isolate);
+  }
+
   // This is a real property that is not read-only, or it is a
   // transition or null descriptor and there are no setters in the prototypes.
-  switch (result->type()) {
+  MaybeObject* result = *value;
+  switch (lookup->type()) {
     case NORMAL:
-      return self->SetNormalizedProperty(result, *value);
+      result = self->SetNormalizedProperty(lookup, *value);
+      break;
     case FIELD:
-      return self->FastPropertyAtPut(result->GetFieldIndex(), *value);
+      result = self->FastPropertyAtPut(
+          lookup->GetFieldIndex().field_index(), *value);
+      break;
     case CONSTANT_FUNCTION:
       // Only replace the function if necessary.
-      if (*value == result->GetConstantFunction()) return *value;
+      if (*value == lookup->GetConstantFunction()) return *value;
       // Preserve the attributes of this existing property.
-      attributes = result->GetAttributes();
-      return self->ConvertDescriptorToField(*name, *value, attributes);
+      attributes = lookup->GetAttributes();
+      result = self->ConvertDescriptorToField(*name, *value, attributes);
+      break;
     case CALLBACKS: {
-      Object* callback_object = result->GetCallbackObject();
+      Object* callback_object = lookup->GetCallbackObject();
       return self->SetPropertyWithCallback(callback_object,
                                            *name,
                                            *value,
-                                           result->holder(),
+                                           lookup->holder(),
                                            strict_mode);
     }
     case INTERCEPTOR:
-      return self->SetPropertyWithInterceptor(*name,
-                                              *value,
-                                              attributes,
-                                              strict_mode);
+      result = self->SetPropertyWithInterceptor(*name,
+                                                *value,
+                                                attributes,
+                                                strict_mode);
+      break;
     case TRANSITION: {
-      Map* transition_map = result->GetTransitionTarget();
+      Map* transition_map = lookup->GetTransitionTarget();
       int descriptor = transition_map->LastAdded();
 
       DescriptorArray* descriptors = transition_map->instance_descriptors();
@@ -2886,37 +2989,55 @@ MaybeObject* JSObject::SetPropertyForResult(LookupResult* result,
       if (details.type() == FIELD) {
         if (attributes == details.attributes()) {
           int field_index = descriptors->GetFieldIndex(descriptor);
-          return self->AddFastPropertyUsingMap(transition_map,
-                                               *name,
-                                               *value,
-                                               field_index);
+          result = self->AddFastPropertyUsingMap(transition_map,
+                                                 *name,
+                                                 *value,
+                                                 field_index);
+        } else {
+          result = self->ConvertDescriptorToField(*name, *value, attributes);
         }
-        return self->ConvertDescriptorToField(*name, *value, attributes);
       } else if (details.type() == CALLBACKS) {
-        return ConvertDescriptorToField(*name, *value, attributes);
-      }
-
-      ASSERT(details.type() == CONSTANT_FUNCTION);
-
-      Object* constant_function = descriptors->GetValue(descriptor);
-      // If the same constant function is being added we can simply
-      // transition to the target map.
-      if (constant_function == *value) {
-        self->set_map(transition_map);
-        return constant_function;
+        result = self->ConvertDescriptorToField(*name, *value, attributes);
+      } else {
+        ASSERT(details.type() == CONSTANT_FUNCTION);
+
+        Object* constant_function = descriptors->GetValue(descriptor);
+        if (constant_function == *value) {
+          // If the same constant function is being added we can simply
+          // transition to the target map.
+          self->set_map(transition_map);
+          result = constant_function;
+        } else {
+          // Otherwise, replace with a map transition to a new map with a FIELD,
+          // even if the value is a constant function.
+          result = self->ConvertTransitionToMapTransition(
+              lookup->GetTransitionIndex(), *name, *value, attributes);
+        }
       }
-      // Otherwise, replace with a map transition to a new map with a FIELD,
-      // even if the value is a constant function.
-      return ConvertTransitionToMapTransition(
-          result->GetTransitionIndex(), *name, *value, attributes);
+      break;
     }
     case HANDLER:
     case NONEXISTENT:
       UNREACHABLE();
-      return *value;
   }
-  UNREACHABLE();  // keep the compiler happy
-  return *value;
+
+  Handle<Object> hresult;
+  if (!result->ToHandle(&hresult, isolate)) return result;
+
+  if (FLAG_harmony_observation && map()->is_observed()) {
+    if (lookup->IsTransition()) {
+      EnqueueChangeRecord(self, "new", name, old_value);
+    } else {
+      LookupResult new_lookup(isolate);
+      self->LocalLookup(*name, &new_lookup, true);
+      ASSERT(!new_lookup.GetLazyValue()->IsTheHole());
+      if (!new_lookup.GetLazyValue()->SameValue(*old_value)) {
+        EnqueueChangeRecord(self, "updated", name, old_value);
+      }
+    }
+  }
+
+  return *hresult;
 }
 
 
@@ -2942,22 +3063,22 @@ Handle<Object> JSObject::SetLocalPropertyIgnoreAttributes(
 
 
 MaybeObject* JSObject::SetLocalPropertyIgnoreAttributes(
-    String* name,
-    Object* value,
+    String* name_raw,
+    Object* value_raw,
     PropertyAttributes attributes) {
   // Make sure that the top context does not change when doing callbacks or
   // interceptor calls.
   AssertNoContextChange ncc;
   Isolate* isolate = GetIsolate();
-  LookupResult result(isolate);
-  LocalLookup(name, &result);
-  if (!result.IsFound()) map()->LookupTransition(this, name, &result);
+  LookupResult lookup(isolate);
+  LocalLookup(name_raw, &lookup, true);
+  if (!lookup.IsFound()) map()->LookupTransition(this, name_raw, &lookup);
   // Check access rights if needed.
   if (IsAccessCheckNeeded()) {
-    if (!isolate->MayNamedAccess(this, name, v8::ACCESS_SET)) {
-      return SetPropertyWithFailedAccessCheck(&result,
-                                              name,
-                                              value,
+    if (!isolate->MayNamedAccess(this, name_raw, v8::ACCESS_SET)) {
+      return SetPropertyWithFailedAccessCheck(&lookup,
+                                              name_raw,
+                                              value_raw,
                                               false,
                                               kNonStrictMode);
     }
@@ -2965,40 +3086,69 @@ MaybeObject* JSObject::SetLocalPropertyIgnoreAttributes(
 
   if (IsJSGlobalProxy()) {
     Object* proto = GetPrototype();
-    if (proto->IsNull()) return value;
+    if (proto->IsNull()) return value_raw;
     ASSERT(proto->IsJSGlobalObject());
     return JSObject::cast(proto)->SetLocalPropertyIgnoreAttributes(
-        name,
-        value,
+        name_raw,
+        value_raw,
         attributes);
   }
 
   // Check for accessor in prototype chain removed here in clone.
-  if (!result.IsFound()) {
+  if (!lookup.IsFound()) {
     // Neither properties nor transitions found.
-    return AddProperty(name, value, attributes, kNonStrictMode);
+    return AddProperty(name_raw, value_raw, attributes, kNonStrictMode);
+  }
+
+  // From this point on everything needs to be handlified.
+  HandleScope scope(isolate);
+  Handle<JSObject> self(this);
+  Handle<String> name(name_raw);
+  Handle<Object> value(value_raw, isolate);
+
+  Handle<Object> old_value(isolate->heap()->the_hole_value(), isolate);
+  PropertyAttributes old_attributes = ABSENT;
+  bool is_observed = FLAG_harmony_observation && self->map()->is_observed();
+  if (is_observed) {
+    // Function prototypes are stored specially
+    if (self->IsJSFunction() &&
+        JSFunction::cast(*self)->should_have_prototype() &&
+        name->Equals(isolate->heap()->prototype_symbol())) {
+      MaybeObject* maybe = Accessors::FunctionGetPrototype(*self, NULL);
+      if (!maybe->ToHandle(&old_value, isolate)) return maybe;
+    } else {
+      old_value = handle(lookup.GetLazyValue(), isolate);
+    }
+    old_attributes = lookup.GetAttributes();
   }
 
   // Check of IsReadOnly removed from here in clone.
-  switch (result.type()) {
+  MaybeObject* result = *value;
+  switch (lookup.type()) {
     case NORMAL: {
       PropertyDetails details = PropertyDetails(attributes, NORMAL);
-      return SetNormalizedProperty(name, value, details);
+      result = self->SetNormalizedProperty(*name, *value, details);
+      break;
     }
     case FIELD:
-      return FastPropertyAtPut(result.GetFieldIndex(), value);
+      result = self->FastPropertyAtPut(
+          lookup.GetFieldIndex().field_index(), *value);
+      break;
     case CONSTANT_FUNCTION:
       // Only replace the function if necessary.
-      if (value == result.GetConstantFunction()) return value;
-      // Preserve the attributes of this existing property.
-      attributes = result.GetAttributes();
-      return ConvertDescriptorToField(name, value, attributes);
+      if (*value != lookup.GetConstantFunction()) {
+        // Preserve the attributes of this existing property.
+        attributes = lookup.GetAttributes();
+        result = self->ConvertDescriptorToField(*name, *value, attributes);
+      }
+      break;
     case CALLBACKS:
     case INTERCEPTOR:
       // Override callback in clone
-      return ConvertDescriptorToField(name, value, attributes);
+      result = self->ConvertDescriptorToField(*name, *value, attributes);
+      break;
     case TRANSITION: {
-      Map* transition_map = result.GetTransitionTarget();
+      Map* transition_map = lookup.GetTransitionTarget();
       int descriptor = transition_map->LastAdded();
 
       DescriptorArray* descriptors = transition_map->instance_descriptors();
@@ -3007,29 +3157,48 @@ MaybeObject* JSObject::SetLocalPropertyIgnoreAttributes(
       if (details.type() == FIELD) {
         if (attributes == details.attributes()) {
           int field_index = descriptors->GetFieldIndex(descriptor);
-          return AddFastPropertyUsingMap(transition_map,
-                                         name,
-                                         value,
-                                         field_index);
+          result = self->AddFastPropertyUsingMap(
+              transition_map, *name, *value, field_index);
+        } else {
+          result = self->ConvertDescriptorToField(*name, *value, attributes);
         }
-        return ConvertDescriptorToField(name, value, attributes);
       } else if (details.type() == CALLBACKS) {
-        return ConvertDescriptorToField(name, value, attributes);
-      }
-
-      ASSERT(details.type() == CONSTANT_FUNCTION);
+        result = self->ConvertDescriptorToField(*name, *value, attributes);
+      } else {
+        ASSERT(details.type() == CONSTANT_FUNCTION);
 
-      // Replace transition to CONSTANT FUNCTION with a map transition to a new
-      // map with a FIELD, even if the value is a function.
-      return ConvertTransitionToMapTransition(
-          result.GetTransitionIndex(), name, value, attributes);
+        // Replace transition to CONSTANT FUNCTION with a map transition to a
+        // new map with a FIELD, even if the value is a function.
+        result = self->ConvertTransitionToMapTransition(
+            lookup.GetTransitionIndex(), *name, *value, attributes);
+      }
+      break;
     }
     case HANDLER:
     case NONEXISTENT:
       UNREACHABLE();
   }
-  UNREACHABLE();  // keep the compiler happy
-  return value;
+
+  Handle<Object> hresult;
+  if (!result->ToHandle(&hresult, isolate)) return result;
+
+  if (is_observed) {
+    if (lookup.IsTransition()) {
+      EnqueueChangeRecord(self, "new", name, old_value);
+    } else {
+      LookupResult new_lookup(isolate);
+      self->LocalLookup(*name, &new_lookup, true);
+      ASSERT(!new_lookup.GetLazyValue()->IsTheHole());
+      if (old_value->IsTheHole() ||
+          new_lookup.GetAttributes() != old_attributes) {
+        EnqueueChangeRecord(self, "reconfigured", name, old_value);
+      } else if (!new_lookup.GetLazyValue()->SameValue(*old_value)) {
+        EnqueueChangeRecord(self, "updated", name, old_value);
+      }
+    }
+  }
+
+  return *hresult;
 }
 
 
@@ -3110,42 +3279,43 @@ PropertyAttributes JSReceiver::GetPropertyAttributeWithReceiver(
       String* key) {
   uint32_t index = 0;
   if (IsJSObject() && key->AsArrayIndex(&index)) {
-    return JSObject::cast(this)->HasElementWithReceiver(receiver, index)
-        ? NONE : ABSENT;
+    return JSObject::cast(this)->GetElementAttributeWithReceiver(
+        receiver, index, true);
   }
   // Named property.
-  LookupResult result(GetIsolate());
-  Lookup(key, &result);
-  return GetPropertyAttribute(receiver, &result, key, true);
+  LookupResult lookup(GetIsolate());
+  Lookup(key, &lookup);
+  return GetPropertyAttributeForResult(receiver, &lookup, key, true);
 }
 
 
-PropertyAttributes JSReceiver::GetPropertyAttribute(JSReceiver* receiver,
-                                                    LookupResult* result,
-                                                    String* name,
-                                                    bool continue_search) {
+PropertyAttributes JSReceiver::GetPropertyAttributeForResult(
+    JSReceiver* receiver,
+    LookupResult* lookup,
+    String* name,
+    bool continue_search) {
   // Check access rights if needed.
   if (IsAccessCheckNeeded()) {
     JSObject* this_obj = JSObject::cast(this);
     Heap* heap = GetHeap();
     if (!heap->isolate()->MayNamedAccess(this_obj, name, v8::ACCESS_HAS)) {
       return this_obj->GetPropertyAttributeWithFailedAccessCheck(
-          receiver, result, name, continue_search);
+          receiver, lookup, name, continue_search);
     }
   }
-  if (result->IsFound()) {
-    switch (result->type()) {
+  if (lookup->IsFound()) {
+    switch (lookup->type()) {
       case NORMAL:  // fall through
       case FIELD:
       case CONSTANT_FUNCTION:
       case CALLBACKS:
-        return result->GetAttributes();
+        return lookup->GetAttributes();
       case HANDLER: {
-        return JSProxy::cast(result->proxy())->GetPropertyAttributeWithHandler(
+        return JSProxy::cast(lookup->proxy())->GetPropertyAttributeWithHandler(
             receiver, name);
       }
       case INTERCEPTOR:
-        return result->holder()->GetPropertyAttributeWithInterceptor(
+        return lookup->holder()->GetPropertyAttributeWithInterceptor(
             JSObject::cast(receiver), name, continue_search);
       case TRANSITION:
       case NONEXISTENT:
@@ -3160,13 +3330,118 @@ PropertyAttributes JSReceiver::GetLocalPropertyAttribute(String* name) {
   // Check whether the name is an array index.
   uint32_t index = 0;
   if (IsJSObject() && name->AsArrayIndex(&index)) {
-    if (JSObject::cast(this)->HasLocalElement(index)) return NONE;
-    return ABSENT;
+    return GetLocalElementAttribute(index);
   }
   // Named property.
-  LookupResult result(GetIsolate());
-  LocalLookup(name, &result);
-  return GetPropertyAttribute(this, &result, name, false);
+  LookupResult lookup(GetIsolate());
+  LocalLookup(name, &lookup, true);
+  return GetPropertyAttributeForResult(this, &lookup, name, false);
+}
+
+
+PropertyAttributes JSObject::GetElementAttributeWithReceiver(
+    JSReceiver* receiver, uint32_t index, bool continue_search) {
+  Isolate* isolate = GetIsolate();
+
+  // Check access rights if needed.
+  if (IsAccessCheckNeeded()) {
+    if (!isolate->MayIndexedAccess(this, index, v8::ACCESS_HAS)) {
+      isolate->ReportFailedAccessCheck(this, v8::ACCESS_HAS);
+      return ABSENT;
+    }
+  }
+
+  if (IsJSGlobalProxy()) {
+    Object* proto = GetPrototype();
+    if (proto->IsNull()) return ABSENT;
+    ASSERT(proto->IsJSGlobalObject());
+    return JSObject::cast(proto)->GetElementAttributeWithReceiver(
+        receiver, index, continue_search);
+  }
+
+  // Check for lookup interceptor except when bootstrapping.
+  if (HasIndexedInterceptor() && !isolate->bootstrapper()->IsActive()) {
+    return GetElementAttributeWithInterceptor(receiver, index, continue_search);
+  }
+
+  // Handle [] on String objects.
+  if (this->IsStringObjectWithCharacterAt(index)) {
+    return static_cast<PropertyAttributes>(READ_ONLY | DONT_DELETE);
+  }
+
+  return GetElementAttributeWithoutInterceptor(
+      receiver, index, continue_search);
+}
+
+
+PropertyAttributes JSObject::GetElementAttributeWithInterceptor(
+    JSReceiver* receiver, uint32_t index, bool continue_search) {
+  Isolate* isolate = GetIsolate();
+  // Make sure that the top context does not change when doing
+  // callbacks or interceptor calls.
+  AssertNoContextChange ncc;
+  HandleScope scope(isolate);
+  Handle<InterceptorInfo> interceptor(GetIndexedInterceptor());
+  Handle<JSReceiver> hreceiver(receiver);
+  Handle<JSObject> holder(this);
+  CustomArguments args(isolate, interceptor->data(), receiver, this);
+  v8::AccessorInfo info(args.end());
+  if (!interceptor->query()->IsUndefined()) {
+    v8::IndexedPropertyQuery query =
+        v8::ToCData<v8::IndexedPropertyQuery>(interceptor->query());
+    LOG(isolate,
+        ApiIndexedPropertyAccess("interceptor-indexed-has", this, index));
+    v8::Handle<v8::Integer> result;
+    {
+      // Leaving JavaScript.
+      VMState state(isolate, EXTERNAL);
+      result = query(index, info);
+    }
+    if (!result.IsEmpty())
+      return static_cast<PropertyAttributes>(result->Int32Value());
+  } else if (!interceptor->getter()->IsUndefined()) {
+    v8::IndexedPropertyGetter getter =
+        v8::ToCData<v8::IndexedPropertyGetter>(interceptor->getter());
+    LOG(isolate,
+        ApiIndexedPropertyAccess("interceptor-indexed-get-has", this, index));
+    v8::Handle<v8::Value> result;
+    {
+      // Leaving JavaScript.
+      VMState state(isolate, EXTERNAL);
+      result = getter(index, info);
+    }
+    if (!result.IsEmpty()) return NONE;
+  }
+
+  return holder->GetElementAttributeWithoutInterceptor(
+      *hreceiver, index, continue_search);
+}
+
+
+PropertyAttributes JSObject::GetElementAttributeWithoutInterceptor(
+      JSReceiver* receiver, uint32_t index, bool continue_search) {
+  Isolate* isolate = GetIsolate();
+  HandleScope scope(isolate);
+  Handle<JSReceiver> hreceiver(receiver);
+  Handle<JSObject> holder(this);
+  PropertyAttributes attr = holder->GetElementsAccessor()->GetAttributes(
+      *hreceiver, *holder, index);
+  if (attr != ABSENT) return attr;
+
+  if (holder->IsStringObjectWithCharacterAt(index)) {
+    return static_cast<PropertyAttributes>(READ_ONLY | DONT_DELETE);
+  }
+
+  if (!continue_search) return ABSENT;
+
+  Object* pt = holder->GetPrototype();
+  if (pt->IsJSProxy()) {
+    // We need to follow the spec and simulate a call to [[GetOwnProperty]].
+    return JSProxy::cast(pt)->GetElementAttributeWithHandler(*hreceiver, index);
+  }
+  if (pt->IsNull()) return ABSENT;
+  return JSObject::cast(pt)->GetElementAttributeWithReceiver(
+      *hreceiver, index, true);
 }
 
 
@@ -3178,10 +3453,12 @@ MaybeObject* NormalizedMapCache::Get(JSObject* obj,
   Object* result = get(index);
   if (result->IsMap() &&
       Map::cast(result)->EquivalentToForNormalization(fast, mode)) {
-#ifdef DEBUG
+#ifdef VERIFY_HEAP
     if (FLAG_verify_heap) {
       Map::cast(result)->SharedMapVerify();
     }
+#endif
+#ifdef DEBUG
     if (FLAG_enable_slow_asserts) {
       // The cached map should match newly created normalized map bit-by-bit,
       // except for the code cache, which can contain some ics which can be
@@ -3271,19 +3548,19 @@ MaybeObject* JSObject::NormalizeProperties(PropertyNormalizationMode mode,
   Map* map_of_this = map();
 
   // Allocate new content.
-  int property_count = map_of_this->NumberOfDescribedProperties();
+  int real_size = map_of_this->NumberOfOwnDescriptors();
+  int property_count = real_size;
   if (expected_additional_properties > 0) {
     property_count += expected_additional_properties;
   } else {
     property_count += 2;  // Make space for two more properties.
   }
   StringDictionary* dictionary;
-  { MaybeObject* maybe_dictionary = StringDictionary::Allocate(property_count);
-    if (!maybe_dictionary->To(&dictionary)) return maybe_dictionary;
-  }
+  MaybeObject* maybe_dictionary = StringDictionary::Allocate(property_count);
+  if (!maybe_dictionary->To(&dictionary)) return maybe_dictionary;
 
   DescriptorArray* descs = map_of_this->instance_descriptors();
-  for (int i = 0; i < descs->number_of_descriptors(); i++) {
+  for (int i = 0; i < real_size; i++) {
     PropertyDetails details = descs->GetDetails(i);
     switch (details.type()) {
       case CONSTANT_FUNCTION: {
@@ -3328,8 +3605,7 @@ MaybeObject* JSObject::NormalizeProperties(PropertyNormalizationMode mode,
   Heap* current_heap = GetHeap();
 
   // Copy the next enumeration index from instance descriptor.
-  int index = map_of_this->instance_descriptors()->NextEnumerationIndex();
-  dictionary->SetNextEnumerationIndex(index);
+  dictionary->SetNextEnumerationIndex(real_size + 1);
 
   Map* new_map;
   MaybeObject* maybe_map =
@@ -3557,7 +3833,6 @@ Object* JSObject::GetHiddenProperty(String* key) {
   ASSERT(!IsJSGlobalProxy());
   MaybeObject* hidden_lookup =
       GetHiddenPropertiesHashTable(ONLY_RETURN_INLINE_VALUE);
-  ASSERT(!hidden_lookup->IsFailure());  // No failure when passing false as arg.
   Object* inline_value = hidden_lookup->ToObjectUnchecked();
 
   if (inline_value->IsSmi()) {
@@ -3598,13 +3873,11 @@ MaybeObject* JSObject::SetHiddenProperty(String* key, Object* value) {
     return JSObject::cast(proxy_parent)->SetHiddenProperty(key, value);
   }
   ASSERT(!IsJSGlobalProxy());
-
-  // If there is no backing store yet, store the identity hash inline.
   MaybeObject* hidden_lookup =
       GetHiddenPropertiesHashTable(ONLY_RETURN_INLINE_VALUE);
-  ASSERT(!hidden_lookup->IsFailure());
   Object* inline_value = hidden_lookup->ToObjectUnchecked();
 
+  // If there is no backing store yet, store the identity hash inline.
   if (value->IsSmi() &&
       key == GetHeap()->identity_hash_symbol() &&
       (inline_value->IsUndefined() || inline_value->IsSmi())) {
@@ -3641,15 +3914,16 @@ void JSObject::DeleteHiddenProperty(String* key) {
     JSObject::cast(proxy_parent)->DeleteHiddenProperty(key);
     return;
   }
+  ASSERT(!IsJSGlobalProxy());
   MaybeObject* hidden_lookup =
       GetHiddenPropertiesHashTable(ONLY_RETURN_INLINE_VALUE);
-  ASSERT(!hidden_lookup->IsFailure());  // No failure when passing false as arg.
-  if (hidden_lookup->ToObjectUnchecked()->IsUndefined()) return;
+  Object* inline_value = hidden_lookup->ToObjectUnchecked();
+
   // We never delete (inline-stored) identity hashes.
-  ASSERT(!hidden_lookup->ToObjectUnchecked()->IsSmi());
+  ASSERT(key != GetHeap()->identity_hash_symbol());
+  if (inline_value->IsUndefined() || inline_value->IsSmi()) return;
 
-  ObjectHashTable* hashtable =
-      ObjectHashTable::cast(hidden_lookup->ToObjectUnchecked());
+  ObjectHashTable* hashtable = ObjectHashTable::cast(inline_value);
   MaybeObject* delete_result = hashtable->Put(key, GetHeap()->the_hole_value());
   USE(delete_result);
   ASSERT(!delete_result->IsFailure());  // Delete does not cause GC.
@@ -3675,10 +3949,11 @@ MaybeObject* JSObject::GetHiddenPropertiesHashTable(
     DescriptorArray* descriptors = this->map()->instance_descriptors();
     if (descriptors->number_of_descriptors() > 0) {
       int sorted_index = descriptors->GetSortedKeyIndex(0);
-      if (descriptors->GetKey(sorted_index) == GetHeap()->hidden_symbol()) {
+      if (descriptors->GetKey(sorted_index) == GetHeap()->hidden_symbol() &&
+          sorted_index < map()->NumberOfOwnDescriptors()) {
         ASSERT(descriptors->GetType(sorted_index) == FIELD);
-        inline_value = this->FastPropertyAt(
-            descriptors->GetFieldIndex(sorted_index));
+        inline_value =
+            this->FastPropertyAt(descriptors->GetFieldIndex(sorted_index));
       } else {
         inline_value = GetHeap()->undefined_value();
       }
@@ -3743,7 +4018,8 @@ MaybeObject* JSObject::SetHiddenPropertiesHashTable(Object* value) {
     DescriptorArray* descriptors = this->map()->instance_descriptors();
     if (descriptors->number_of_descriptors() > 0) {
       int sorted_index = descriptors->GetSortedKeyIndex(0);
-      if (descriptors->GetKey(sorted_index) == GetHeap()->hidden_symbol()) {
+      if (descriptors->GetKey(sorted_index) == GetHeap()->hidden_symbol() &&
+          sorted_index < map()->NumberOfOwnDescriptors()) {
         ASSERT(descriptors->GetType(sorted_index) == FIELD);
         this->FastPropertyAtPut(descriptors->GetFieldIndex(sorted_index),
                                 value);
@@ -3868,6 +4144,21 @@ MaybeObject* JSObject::DeleteElement(uint32_t index, DeleteMode mode) {
     return isolate->heap()->false_value();
   }
 
+  if (IsStringObjectWithCharacterAt(index)) {
+    if (mode == STRICT_DELETION) {
+      // Deleting a non-configurable property in strict mode.
+      HandleScope scope(isolate);
+      Handle<Object> holder(this);
+      Handle<Object> name = isolate->factory()->NewNumberFromUint(index);
+      Handle<Object> args[2] = { name, holder };
+      Handle<Object> error =
+          isolate->factory()->NewTypeError("strict_delete_property",
+                                           HandleVector(args, 2));
+      return isolate->Throw(*error);
+    }
+    return isolate->heap()->false_value();
+  }
+
   if (IsJSGlobalProxy()) {
     Object* proto = GetPrototype();
     if (proto->IsNull()) return isolate->heap()->false_value();
@@ -3875,15 +4166,38 @@ MaybeObject* JSObject::DeleteElement(uint32_t index, DeleteMode mode) {
     return JSGlobalObject::cast(proto)->DeleteElement(index, mode);
   }
 
-  if (HasIndexedInterceptor()) {
-    // Skip interceptor if forcing deletion.
-    if (mode != FORCE_DELETION) {
-      return DeleteElementWithInterceptor(index);
+  // From this point on everything needs to be handlified.
+  HandleScope scope(isolate);
+  Handle<JSObject> self(this);
+
+  Handle<Object> old_value;
+  bool should_enqueue_change_record = false;
+  if (FLAG_harmony_observation && self->map()->is_observed()) {
+    should_enqueue_change_record = self->HasLocalElement(index);
+    if (should_enqueue_change_record) {
+      old_value = self->GetLocalElementAccessorPair(index) != NULL
+          ? Handle<Object>::cast(isolate->factory()->the_hole_value())
+          : Object::GetElement(self, index);
     }
-    mode = JSReceiver::FORCE_DELETION;
   }
 
-  return GetElementsAccessor()->Delete(this, index, mode);
+  MaybeObject* result;
+  // Skip interceptor if forcing deletion.
+  if (self->HasIndexedInterceptor() && mode != FORCE_DELETION) {
+    result = self->DeleteElementWithInterceptor(index);
+  } else {
+    result = self->GetElementsAccessor()->Delete(*self, index, mode);
+  }
+
+  Handle<Object> hresult;
+  if (!result->ToHandle(&hresult, isolate)) return result;
+
+  if (should_enqueue_change_record && !self->HasLocalElement(index)) {
+    Handle<String> name = isolate->factory()->Uint32ToString(index);
+    EnqueueChangeRecord(self, "deleted", name, old_value);
+  }
+
+  return *hresult;
 }
 
 
@@ -3917,38 +4231,60 @@ MaybeObject* JSObject::DeleteProperty(String* name, DeleteMode mode) {
   uint32_t index = 0;
   if (name->AsArrayIndex(&index)) {
     return DeleteElement(index, mode);
-  } else {
-    LookupResult result(isolate);
-    LocalLookup(name, &result);
-    if (!result.IsFound()) return isolate->heap()->true_value();
-    // Ignore attributes if forcing a deletion.
-    if (result.IsDontDelete() && mode != FORCE_DELETION) {
-      if (mode == STRICT_DELETION) {
-        // Deleting a non-configurable property in strict mode.
-        HandleScope scope(isolate);
-        Handle<Object> args[2] = { Handle<Object>(name), Handle<Object>(this) };
-        return isolate->Throw(*isolate->factory()->NewTypeError(
-            "strict_delete_property", HandleVector(args, 2)));
-      }
-      return isolate->heap()->false_value();
-    }
-    // Check for interceptor.
-    if (result.IsInterceptor()) {
-      // Skip interceptor if forcing a deletion.
-      if (mode == FORCE_DELETION) {
-        return DeletePropertyPostInterceptor(name, mode);
-      }
-      return DeletePropertyWithInterceptor(name);
+  }
+
+  LookupResult lookup(isolate);
+  LocalLookup(name, &lookup, true);
+  if (!lookup.IsFound()) return isolate->heap()->true_value();
+  // Ignore attributes if forcing a deletion.
+  if (lookup.IsDontDelete() && mode != FORCE_DELETION) {
+    if (mode == STRICT_DELETION) {
+      // Deleting a non-configurable property in strict mode.
+      HandleScope scope(isolate);
+      Handle<Object> args[2] = { Handle<Object>(name), Handle<Object>(this) };
+      return isolate->Throw(*isolate->factory()->NewTypeError(
+          "strict_delete_property", HandleVector(args, 2)));
     }
+    return isolate->heap()->false_value();
+  }
+
+  // From this point on everything needs to be handlified.
+  HandleScope scope(isolate);
+  Handle<JSObject> self(this);
+  Handle<String> hname(name);
+
+  Handle<Object> old_value(isolate->heap()->the_hole_value());
+  bool is_observed = FLAG_harmony_observation && self->map()->is_observed();
+  if (is_observed) {
+    old_value = handle(lookup.GetLazyValue(), isolate);
+  }
+  MaybeObject* result;
+
+  // Check for interceptor.
+  if (lookup.IsInterceptor()) {
+    // Skip interceptor if forcing a deletion.
+    if (mode == FORCE_DELETION) {
+      result = self->DeletePropertyPostInterceptor(*hname, mode);
+    } else {
+      result = self->DeletePropertyWithInterceptor(*hname);
+    }
+  } else {
     // Normalize object if needed.
     Object* obj;
-    { MaybeObject* maybe_obj =
-          NormalizeProperties(CLEAR_INOBJECT_PROPERTIES, 0);
-      if (!maybe_obj->ToObject(&obj)) return maybe_obj;
-    }
+    result = self->NormalizeProperties(CLEAR_INOBJECT_PROPERTIES, 0);
+    if (!result->To(&obj)) return result;
     // Make sure the properties are normalized before removing the entry.
-    return DeleteNormalizedProperty(name, mode);
+    result = self->DeleteNormalizedProperty(*hname, mode);
   }
+
+  Handle<Object> hresult;
+  if (!result->ToHandle(&hresult, isolate)) return result;
+
+  if (is_observed && !self->HasLocalProperty(*hname)) {
+    EnqueueChangeRecord(self, "deleted", hname, old_value);
+  }
+
+  return *hresult;
 }
 
 
@@ -4178,21 +4514,15 @@ bool JSReceiver::IsSimpleEnum() {
 }
 
 
-void Map::SetDescriptors(Handle<Map> map,
-                         Handle<DescriptorArray> descriptors) {
-  Isolate* isolate = map->GetIsolate();
-  CALL_HEAP_FUNCTION_VOID(isolate, map->SetDescriptors(*descriptors));
-}
-
-
-int Map::NumberOfDescribedProperties(PropertyAttributes filter) {
+int Map::NumberOfDescribedProperties(DescriptorFlag which,
+                                     PropertyAttributes filter) {
   int result = 0;
   DescriptorArray* descs = instance_descriptors();
-  for (int i = 0; i < descs->number_of_descriptors(); i++) {
-    PropertyDetails details = descs->GetDetails(i);
-    if ((details.attributes() & filter) == 0) {
-      result++;
-    }
+  int limit = which == ALL_DESCRIPTORS
+      ? descs->number_of_descriptors()
+      : NumberOfOwnDescriptors();
+  for (int i = 0; i < limit; i++) {
+    if ((descs->GetDetails(i).attributes() & filter) == 0) result++;
   }
   return result;
 }
@@ -4200,7 +4530,8 @@ int Map::NumberOfDescribedProperties(PropertyAttributes filter) {
 
 int Map::PropertyIndexFor(String* name) {
   DescriptorArray* descs = instance_descriptors();
-  for (int i = 0; i < descs->number_of_descriptors(); i++) {
+  int limit = NumberOfOwnDescriptors();
+  for (int i = 0; i < limit; i++) {
     if (name->Equals(descs->GetKey(i))) return descs->GetFieldIndex(i);
   }
   return -1;
@@ -4209,8 +4540,9 @@ int Map::PropertyIndexFor(String* name) {
 
 int Map::NextFreePropertyIndex() {
   int max_index = -1;
+  int number_of_own_descriptors = NumberOfOwnDescriptors();
   DescriptorArray* descs = instance_descriptors();
-  for (int i = 0; i < descs->number_of_descriptors(); i++) {
+  for (int i = 0; i < number_of_own_descriptors; i++) {
     if (descs->GetType(i) == FIELD) {
       int current_index = descs->GetFieldIndex(i);
       if (current_index > max_index) max_index = current_index;
@@ -4222,8 +4554,9 @@ int Map::NextFreePropertyIndex() {
 
 AccessorDescriptor* Map::FindAccessor(String* name) {
   DescriptorArray* descs = instance_descriptors();
-  for (int i = 0; i < descs->number_of_descriptors(); i++) {
-    if (name->Equals(descs->GetKey(i)) && descs->GetType(i) == CALLBACKS) {
+  int number_of_own_descriptors = NumberOfOwnDescriptors();
+  for (int i = 0; i < number_of_own_descriptors; i++) {
+    if (descs->GetType(i) == CALLBACKS && name->Equals(descs->GetKey(i))) {
       return descs->GetCallbacks(i);
     }
   }
@@ -4231,7 +4564,8 @@ AccessorDescriptor* Map::FindAccessor(String* name) {
 }
 
 
-void JSReceiver::LocalLookup(String* name, LookupResult* result) {
+void JSReceiver::LocalLookup(
+    String* name, LookupResult* result, bool search_hidden_prototypes) {
   ASSERT(name->IsString());
 
   Heap* heap = GetHeap();
@@ -4240,7 +4574,8 @@ void JSReceiver::LocalLookup(String* name, LookupResult* result) {
     Object* proto = GetPrototype();
     if (proto->IsNull()) return result->NotFound();
     ASSERT(proto->IsJSGlobalObject());
-    return JSReceiver::cast(proto)->LocalLookup(name, result);
+    return JSReceiver::cast(proto)->LocalLookup(
+        name, result, search_hidden_prototypes);
   }
 
   if (IsJSProxy()) {
@@ -4270,6 +4605,14 @@ void JSReceiver::LocalLookup(String* name, LookupResult* result) {
   }
 
   js_object->LocalLookupRealNamedProperty(name, result);
+  if (result->IsFound() || !search_hidden_prototypes) return;
+
+  Object* proto = js_object->GetPrototype();
+  if (!proto->IsJSReceiver()) return;
+  JSReceiver* receiver = JSReceiver::cast(proto);
+  if (receiver->map()->is_hidden_prototype()) {
+    receiver->LocalLookup(name, result, search_hidden_prototypes);
+  }
 }
 
 
@@ -4279,7 +4622,7 @@ void JSReceiver::Lookup(String* name, LookupResult* result) {
   for (Object* current = this;
        current != heap->null_value();
        current = JSObject::cast(current)->GetPrototype()) {
-    JSReceiver::cast(current)->LocalLookup(name, result);
+    JSReceiver::cast(current)->LocalLookup(name, result, false);
     if (result->IsFound()) return;
   }
   result->NotFound();
@@ -4420,7 +4763,9 @@ MaybeObject* JSObject::DefinePropertyAccessor(String* name,
   // to do a lookup, which seems to be a bit of overkill.
   Heap* heap = GetHeap();
   bool only_attribute_changes = getter->IsNull() && setter->IsNull();
-  if (HasFastProperties() && !only_attribute_changes) {
+  if (HasFastProperties() && !only_attribute_changes &&
+      (map()->NumberOfOwnDescriptors() <
+       DescriptorArray::kMaxNumberOfDescriptors)) {
     MaybeObject* getterOk = heap->undefined_value();
     if (!getter->IsNull()) {
       getterOk = DefineFastAccessor(name, ACCESSOR_GETTER, getter, attributes);
@@ -4550,14 +4895,14 @@ void JSObject::DefineAccessor(Handle<JSObject> object,
       object->DefineAccessor(*name, *getter, *setter, attributes));
 }
 
-MaybeObject* JSObject::DefineAccessor(String* name,
-                                      Object* getter,
-                                      Object* setter,
+MaybeObject* JSObject::DefineAccessor(String* name_raw,
+                                      Object* getter_raw,
+                                      Object* setter_raw,
                                       PropertyAttributes attributes) {
   Isolate* isolate = GetIsolate();
   // Check access rights if needed.
   if (IsAccessCheckNeeded() &&
-      !isolate->MayNamedAccess(this, name, v8::ACCESS_SET)) {
+      !isolate->MayNamedAccess(this, name_raw, v8::ACCESS_SET)) {
     isolate->ReportFailedAccessCheck(this, v8::ACCESS_SET);
     return isolate->heap()->undefined_value();
   }
@@ -4567,7 +4912,7 @@ MaybeObject* JSObject::DefineAccessor(String* name,
     if (proto->IsNull()) return this;
     ASSERT(proto->IsJSGlobalObject());
     return JSObject::cast(proto)->DefineAccessor(
-        name, getter, setter, attributes);
+        name_raw, getter_raw, setter_raw, attributes);
   }
 
   // Make sure that the top context does not change when doing callbacks or
@@ -4575,14 +4920,50 @@ MaybeObject* JSObject::DefineAccessor(String* name,
   AssertNoContextChange ncc;
 
   // Try to flatten before operating on the string.
-  name->TryFlatten();
+  name_raw->TryFlatten();
 
-  if (!CanSetCallback(name)) return isolate->heap()->undefined_value();
+  if (!CanSetCallback(name_raw)) return isolate->heap()->undefined_value();
+
+  // From this point on everything needs to be handlified.
+  HandleScope scope(isolate);
+  Handle<JSObject> self(this);
+  Handle<String> name(name_raw);
+  Handle<Object> getter(getter_raw);
+  Handle<Object> setter(setter_raw);
 
   uint32_t index = 0;
-  return name->AsArrayIndex(&index) ?
-      DefineElementAccessor(index, getter, setter, attributes) :
-      DefinePropertyAccessor(name, getter, setter, attributes);
+  bool is_element = name->AsArrayIndex(&index);
+
+  Handle<Object> old_value = isolate->factory()->the_hole_value();
+  bool is_observed = FLAG_harmony_observation && self->map()->is_observed();
+  bool preexists = false;
+  if (is_observed) {
+    if (is_element) {
+      preexists = HasLocalElement(index);
+      if (preexists && self->GetLocalElementAccessorPair(index) == NULL) {
+        old_value = Object::GetElement(self, index);
+      }
+    } else {
+      LookupResult lookup(isolate);
+      LocalLookup(*name, &lookup, true);
+      preexists = lookup.IsProperty();
+      if (preexists) old_value = handle(lookup.GetLazyValue(), isolate);
+    }
+  }
+
+  MaybeObject* result = is_element ?
+    self->DefineElementAccessor(index, *getter, *setter, attributes) :
+    self->DefinePropertyAccessor(*name, *getter, *setter, attributes);
+
+  Handle<Object> hresult;
+  if (!result->ToHandle(&hresult, isolate)) return result;
+
+  if (is_observed) {
+    const char* type = preexists ? "reconfigured" : "new";
+    EnqueueChangeRecord(self, type, name, old_value);
+  }
+
+  return *hresult;
 }
 
 
@@ -4647,9 +5028,10 @@ MaybeObject* JSObject::DefineFastAccessor(String* name,
 
     if (result.IsFound()) {
       Map* target = result.GetTransitionTarget();
-      ASSERT(target->instance_descriptors()->number_of_descriptors() ==
-             map()->instance_descriptors()->number_of_descriptors());
-      ASSERT(target->instance_descriptors()->GetKey(descriptor_number) == name);
+      ASSERT(target->NumberOfOwnDescriptors() ==
+             map()->NumberOfOwnDescriptors());
+      // This works since descriptors are sorted in order of addition.
+      ASSERT(map()->instance_descriptors()->GetKey(descriptor_number) == name);
       return TryAccessorTransition(
           this, target, descriptor_number, component, accessor, attributes);
     }
@@ -4661,7 +5043,8 @@ MaybeObject* JSObject::DefineFastAccessor(String* name,
     if (result.IsFound()) {
       Map* target = result.GetTransitionTarget();
       int descriptor_number = target->LastAdded();
-      ASSERT(target->instance_descriptors()->GetKey(descriptor_number) == name);
+      ASSERT(target->instance_descriptors()->GetKey(descriptor_number)
+             ->Equals(name));
       return TryAccessorTransition(
           this, target, descriptor_number, component, accessor, attributes);
     }
@@ -4760,7 +5143,7 @@ MaybeObject* JSObject::DefineAccessor(AccessorInfo* info) {
   } else {
     // Lookup the name.
     LookupResult result(isolate);
-    LocalLookup(name, &result);
+    LocalLookup(name, &result, true);
     // ES5 forbids turning a property into an accessor if it's not
     // configurable (that is IsDontDelete in ES3 and v8), see 8.6.1 (Table 5).
     if (result.IsFound() && (result.IsReadOnly() || result.IsDontDelete())) {
@@ -4832,8 +5215,9 @@ Object* JSObject::LookupAccessor(String* name, AccessorComponent component) {
 
 Object* JSObject::SlowReverseLookup(Object* value) {
   if (HasFastProperties()) {
+    int number_of_own_descriptors = map()->NumberOfOwnDescriptors();
     DescriptorArray* descs = map()->instance_descriptors();
-    for (int i = 0; i < descs->number_of_descriptors(); i++) {
+    for (int i = 0; i < number_of_own_descriptors; i++) {
       if (descs->GetType(i) == FIELD) {
         if (FastPropertyAt(descs->GetFieldIndex(i)) == value) {
           return descs->GetKey(i);
@@ -4861,9 +5245,11 @@ MaybeObject* Map::RawCopy(int instance_size) {
   result->set_constructor(constructor());
   result->set_bit_field(bit_field());
   result->set_bit_field2(bit_field2());
-  result->set_bit_field3(bit_field3());
-  result->SetNumberOfOwnDescriptors(0);
-  result->SetEnumLength(kInvalidEnumCache);
+  int new_bit_field3 = bit_field3();
+  new_bit_field3 = OwnsDescriptors::update(new_bit_field3, true);
+  new_bit_field3 = NumberOfOwnDescriptorsBits::update(new_bit_field3, 0);
+  new_bit_field3 = EnumLengthBits::update(new_bit_field3, kInvalidEnumCache);
+  result->set_bit_field3(new_bit_field3);
   return result;
 }
 
@@ -4887,7 +5273,7 @@ MaybeObject* Map::CopyNormalized(PropertyNormalizationMode mode,
   result->set_is_shared(sharing == SHARED_NORMALIZED_MAP);
   result->set_dictionary_map(true);
 
-#ifdef DEBUG
+#ifdef VERIFY_HEAP
   if (FLAG_verify_heap && result->is_shared()) {
     result->SharedMapVerify();
   }
@@ -4913,22 +5299,100 @@ MaybeObject* Map::CopyDropDescriptors() {
 }
 
 
+MaybeObject* Map::ShareDescriptor(DescriptorArray* descriptors,
+                                  Descriptor* descriptor) {
+  // Sanity check. This path is only to be taken if the map owns its descriptor
+  // array, implying that its NumberOfOwnDescriptors equals the number of
+  // descriptors in the descriptor array.
+  ASSERT(NumberOfOwnDescriptors() ==
+         instance_descriptors()->number_of_descriptors());
+  Map* result;
+  MaybeObject* maybe_result = CopyDropDescriptors();
+  if (!maybe_result->To(&result)) return maybe_result;
+
+  String* name = descriptor->GetKey();
+
+  TransitionArray* transitions;
+  MaybeObject* maybe_transitions =
+      AddTransition(name, result, SIMPLE_TRANSITION);
+  if (!maybe_transitions->To(&transitions)) return maybe_transitions;
+
+  int old_size = descriptors->number_of_descriptors();
+
+  DescriptorArray* new_descriptors;
+
+  if (descriptors->NumberOfSlackDescriptors() > 0) {
+    new_descriptors = descriptors;
+    new_descriptors->Append(descriptor);
+  } else {
+    // Descriptor arrays grow by 50%.
+    MaybeObject* maybe_descriptors = DescriptorArray::Allocate(
+        old_size, old_size < 4 ? 1 : old_size / 2);
+    if (!maybe_descriptors->To(&new_descriptors)) return maybe_descriptors;
+
+    DescriptorArray::WhitenessWitness witness(new_descriptors);
+
+    // Copy the descriptors, inserting a descriptor.
+    for (int i = 0; i < old_size; ++i) {
+      new_descriptors->CopyFrom(i, descriptors, i, witness);
+    }
+
+    new_descriptors->Append(descriptor, witness);
+
+    if (old_size > 0) {
+      // If the source descriptors had an enum cache we copy it. This ensures
+      // that the maps to which we push the new descriptor array back can rely
+      // on a cache always being available once it is set. If the map has more
+      // enumerated descriptors than available in the original cache, the cache
+      // will be lazily replaced by the extended cache when needed.
+      if (descriptors->HasEnumCache()) {
+        new_descriptors->CopyEnumCacheFrom(descriptors);
+      }
+
+      Map* map;
+      // Replace descriptors by new_descriptors in all maps that share it.
+      for (Object* current = GetBackPointer();
+           !current->IsUndefined();
+           current = map->GetBackPointer()) {
+        map = Map::cast(current);
+        if (map->instance_descriptors() != descriptors) break;
+        map->set_instance_descriptors(new_descriptors);
+      }
+
+      set_instance_descriptors(new_descriptors);
+    }
+  }
+
+  result->SetBackPointer(this);
+  result->InitializeDescriptors(new_descriptors);
+  ASSERT(result->NumberOfOwnDescriptors() == NumberOfOwnDescriptors() + 1);
+
+  set_transitions(transitions);
+  set_owns_descriptors(false);
+
+  return result;
+}
+
+
 MaybeObject* Map::CopyReplaceDescriptors(DescriptorArray* descriptors,
                                          String* name,
-                                         TransitionFlag flag) {
+                                         TransitionFlag flag,
+                                         int descriptor_index) {
+  ASSERT(descriptors->IsSortedNoDuplicates());
+
   Map* result;
   MaybeObject* maybe_result = CopyDropDescriptors();
   if (!maybe_result->To(&result)) return maybe_result;
 
-  if (descriptors->number_of_descriptors() != 0) {
-    MaybeObject* maybe_failure = result->SetDescriptors(descriptors);
-    if (maybe_failure->IsFailure()) return maybe_failure;
-    result->SetNumberOfOwnDescriptors(descriptors->number_of_descriptors());
-  }
+  result->InitializeDescriptors(descriptors);
 
   if (flag == INSERT_TRANSITION && CanHaveMoreTransitions()) {
     TransitionArray* transitions;
-    MaybeObject* maybe_transitions = AddTransition(name, result);
+    SimpleTransitionFlag simple_flag =
+        (descriptor_index == descriptors->number_of_descriptors() - 1)
+         ? SIMPLE_TRANSITION
+         : FULL_TRANSITION;
+    MaybeObject* maybe_transitions = AddTransition(name, result, simple_flag);
     if (!maybe_transitions->To(&transitions)) return maybe_transitions;
 
     set_transitions(transitions);
@@ -4940,12 +5404,6 @@ MaybeObject* Map::CopyReplaceDescriptors(DescriptorArray* descriptors,
 
 
 MaybeObject* Map::CopyAsElementsKind(ElementsKind kind, TransitionFlag flag) {
-  // Create a new free-floating map only if we are not allowed to store it.
-  Map* new_map = NULL;
-  MaybeObject* maybe_new_map = Copy();
-  if (!maybe_new_map->To(&new_map)) return maybe_new_map;
-  new_map->set_elements_kind(kind);
-
   if (flag == INSERT_TRANSITION) {
     ASSERT(!HasElementsTransition() ||
         ((elements_transition_map()->elements_kind() == DICTIONARY_ELEMENTS ||
@@ -4956,10 +5414,40 @@ MaybeObject* Map::CopyAsElementsKind(ElementsKind kind, TransitionFlag flag) {
     ASSERT(!IsFastElementsKind(kind) ||
            IsMoreGeneralElementsKindTransition(elements_kind(), kind));
     ASSERT(kind != elements_kind());
+  }
+
+  bool insert_transition =
+      flag == INSERT_TRANSITION && !HasElementsTransition();
+
+  if (insert_transition && owns_descriptors()) {
+    // In case the map owned its own descriptors, share the descriptors and
+    // transfer ownership to the new map.
+    Map* new_map;
+    MaybeObject* maybe_new_map = CopyDropDescriptors();
+    if (!maybe_new_map->To(&new_map)) return maybe_new_map;
 
     MaybeObject* added_elements = set_elements_transition_map(new_map);
     if (added_elements->IsFailure()) return added_elements;
 
+    new_map->set_elements_kind(kind);
+    new_map->InitializeDescriptors(instance_descriptors());
+    new_map->SetBackPointer(this);
+    set_owns_descriptors(false);
+    return new_map;
+  }
+
+  // In case the map did not own its own descriptors, a split is forced by
+  // copying the map; creating a new descriptor array cell.
+  // Create a new free-floating map only if we are not allowed to store it.
+  Map* new_map;
+  MaybeObject* maybe_new_map = Copy();
+  if (!maybe_new_map->To(&new_map)) return maybe_new_map;
+
+  new_map->set_elements_kind(kind);
+
+  if (insert_transition) {
+    MaybeObject* added_elements = set_elements_transition_map(new_map);
+    if (added_elements->IsFailure()) return added_elements;
     new_map->SetBackPointer(this);
   }
 
@@ -4977,13 +5465,25 @@ MaybeObject* Map::CopyWithPreallocatedFieldDescriptors() {
   Map* map = ctor->initial_map();
   DescriptorArray* descriptors = map->instance_descriptors();
 
-  return CopyReplaceDescriptors(descriptors, NULL, OMIT_TRANSITION);
+  int number_of_own_descriptors = map->NumberOfOwnDescriptors();
+  DescriptorArray* new_descriptors;
+  MaybeObject* maybe_descriptors =
+      descriptors->CopyUpTo(number_of_own_descriptors);
+  if (!maybe_descriptors->To(&new_descriptors)) return maybe_descriptors;
+
+  return CopyReplaceDescriptors(new_descriptors, NULL, OMIT_TRANSITION, 0);
 }
 
 
 MaybeObject* Map::Copy() {
   DescriptorArray* descriptors = instance_descriptors();
-  return CopyReplaceDescriptors(descriptors, NULL, OMIT_TRANSITION);
+  DescriptorArray* new_descriptors;
+  int number_of_own_descriptors = NumberOfOwnDescriptors();
+  MaybeObject* maybe_descriptors =
+      descriptors->CopyUpTo(number_of_own_descriptors);
+  if (!maybe_descriptors->To(&new_descriptors)) return maybe_descriptors;
+
+  return CopyReplaceDescriptors(new_descriptors, NULL, OMIT_TRANSITION, 0);
 }
 
 
@@ -4995,28 +5495,39 @@ MaybeObject* Map::CopyAddDescriptor(Descriptor* descriptor,
   MaybeObject* maybe_failure = descriptor->KeyToSymbol();
   if (maybe_failure->IsFailure()) return maybe_failure;
 
-  String* key = descriptor->GetKey();
-  ASSERT(descriptors->Search(key) == DescriptorArray::kNotFound);
-
-  int old_size = descriptors->number_of_descriptors();
+  int old_size = NumberOfOwnDescriptors();
   int new_size = old_size + 1;
+  descriptor->SetEnumerationIndex(new_size);
+
+  if (flag == INSERT_TRANSITION &&
+      owns_descriptors() &&
+      CanHaveMoreTransitions()) {
+    return ShareDescriptor(descriptors, descriptor);
+  }
 
   DescriptorArray* new_descriptors;
-  MaybeObject* maybe_descriptors = DescriptorArray::Allocate(new_size);
+  MaybeObject* maybe_descriptors = DescriptorArray::Allocate(old_size, 1);
   if (!maybe_descriptors->To(&new_descriptors)) return maybe_descriptors;
 
-  FixedArray::WhitenessWitness witness(new_descriptors);
+  DescriptorArray::WhitenessWitness witness(new_descriptors);
 
   // Copy the descriptors, inserting a descriptor.
   for (int i = 0; i < old_size; ++i) {
     new_descriptors->CopyFrom(i, descriptors, i, witness);
   }
 
-  new_descriptors->Append(descriptor, witness, old_size);
+  if (old_size != descriptors->number_of_descriptors()) {
+    new_descriptors->SetNumberOfDescriptors(new_size);
+    new_descriptors->Set(old_size, descriptor, witness);
+    new_descriptors->Sort();
+  } else {
+    new_descriptors->Append(descriptor, witness);
+  }
 
-  SLOW_ASSERT(new_descriptors->IsSortedNoDuplicates());
+  String* key = descriptor->GetKey();
+  int insertion_index = new_descriptors->number_of_descriptors() - 1;
 
-  return CopyReplaceDescriptors(new_descriptors, key, flag);
+  return CopyReplaceDescriptors(new_descriptors, key, flag, insertion_index);
 }
 
 
@@ -5029,21 +5540,38 @@ MaybeObject* Map::CopyInsertDescriptor(Descriptor* descriptor,
   if (maybe_result->IsFailure()) return maybe_result;
 
   // We replace the key if it is already present.
-  int index = old_descriptors->SearchWithCache(descriptor->GetKey());
+  int index = old_descriptors->SearchWithCache(descriptor->GetKey(), this);
   if (index != DescriptorArray::kNotFound) {
-    return CopyReplaceDescriptor(descriptor, index, flag);
+    return CopyReplaceDescriptor(old_descriptors, descriptor, index, flag);
   }
   return CopyAddDescriptor(descriptor, flag);
 }
 
 
-MaybeObject* Map::CopyReplaceDescriptor(Descriptor* descriptor,
+MaybeObject* DescriptorArray::CopyUpTo(int enumeration_index) {
+  if (enumeration_index == 0) return GetHeap()->empty_descriptor_array();
+
+  int size = enumeration_index;
+
+  DescriptorArray* descriptors;
+  MaybeObject* maybe_descriptors = Allocate(size);
+  if (!maybe_descriptors->To(&descriptors)) return maybe_descriptors;
+  DescriptorArray::WhitenessWitness witness(descriptors);
+
+  for (int i = 0; i < size; ++i) {
+    descriptors->CopyFrom(i, this, i, witness);
+  }
+
+  if (number_of_descriptors() != enumeration_index) descriptors->Sort();
+
+  return descriptors;
+}
+
+
+MaybeObject* Map::CopyReplaceDescriptor(DescriptorArray* descriptors,
+                                        Descriptor* descriptor,
                                         int insertion_index,
                                         TransitionFlag flag) {
-  DescriptorArray* descriptors = instance_descriptors();
-  int size = descriptors->number_of_descriptors();
-  ASSERT(0 <= insertion_index && insertion_index < size);
-
   // Ensure the key is a symbol.
   MaybeObject* maybe_failure = descriptor->KeyToSymbol();
   if (maybe_failure->IsFailure()) return maybe_failure;
@@ -5051,27 +5579,30 @@ MaybeObject* Map::CopyReplaceDescriptor(Descriptor* descriptor,
   String* key = descriptor->GetKey();
   ASSERT(key == descriptors->GetKey(insertion_index));
 
+  int new_size = NumberOfOwnDescriptors();
+  ASSERT(0 <= insertion_index && insertion_index < new_size);
+
+  PropertyDetails details = descriptors->GetDetails(insertion_index);
+  ASSERT_LE(details.descriptor_index(), new_size);
+  descriptor->SetEnumerationIndex(details.descriptor_index());
+
   DescriptorArray* new_descriptors;
-  MaybeObject* maybe_descriptors = DescriptorArray::Allocate(size);
+  MaybeObject* maybe_descriptors = DescriptorArray::Allocate(new_size);
   if (!maybe_descriptors->To(&new_descriptors)) return maybe_descriptors;
+  DescriptorArray::WhitenessWitness witness(new_descriptors);
 
-  FixedArray::WhitenessWitness witness(new_descriptors);
-
-  // Copy the descriptors, replacing a descriptor.
-  for (int index = 0; index < size; ++index) {
-    if (index == insertion_index) continue;
-    new_descriptors->CopyFrom(index, descriptors, index, witness);
+  for (int i = 0; i < new_size; ++i) {
+    if (i == insertion_index) {
+      new_descriptors->Set(i, descriptor, witness);
+    } else {
+      new_descriptors->CopyFrom(i, descriptors, i, witness);
+    }
   }
 
-  PropertyDetails original_details = descriptors->GetDetails(insertion_index);
-  descriptor->SetEnumerationIndex(original_details.descriptor_index());
-  descriptor->SetSortedKey(original_details.pointer());
-
-  new_descriptors->Set(insertion_index, descriptor, witness);
-
-  SLOW_ASSERT(new_descriptors->IsSortedNoDuplicates());
+  // Re-sort if descriptors were removed.
+  if (new_size != descriptors->length()) new_descriptors->Sort();
 
-  return CopyReplaceDescriptors(new_descriptors, key, flag);
+  return CopyReplaceDescriptors(new_descriptors, key, flag, insertion_index);
 }
 
 
@@ -5846,39 +6377,39 @@ bool FixedArray::IsEqualTo(FixedArray* other) {
 #endif
 
 
-MaybeObject* DescriptorArray::Allocate(int number_of_descriptors) {
+MaybeObject* DescriptorArray::Allocate(int number_of_descriptors, int slack) {
   Heap* heap = Isolate::Current()->heap();
   // Do not use DescriptorArray::cast on incomplete object.
+  int size = number_of_descriptors + slack;
+  if (size == 0) return heap->empty_descriptor_array();
   FixedArray* result;
-  if (number_of_descriptors == 0) return heap->empty_descriptor_array();
   // Allocate the array of keys.
-  MaybeObject* maybe_array =
-      heap->AllocateFixedArray(LengthFor(number_of_descriptors));
+  MaybeObject* maybe_array = heap->AllocateFixedArray(LengthFor(size));
   if (!maybe_array->To(&result)) return maybe_array;
 
+  result->set(kDescriptorLengthIndex, Smi::FromInt(number_of_descriptors));
   result->set(kEnumCacheIndex, Smi::FromInt(0));
   return result;
 }
 
 
+void DescriptorArray::ClearEnumCache() {
+  set(kEnumCacheIndex, Smi::FromInt(0));
+}
+
+
 void DescriptorArray::SetEnumCache(FixedArray* bridge_storage,
                                    FixedArray* new_cache,
                                    Object* new_index_cache) {
   ASSERT(bridge_storage->length() >= kEnumCacheBridgeLength);
   ASSERT(new_index_cache->IsSmi() || new_index_cache->IsFixedArray());
-  if (HasEnumCache()) {
-    FixedArray::cast(get(kEnumCacheIndex))->
-      set(kEnumCacheBridgeCacheIndex, new_cache);
-    FixedArray::cast(get(kEnumCacheIndex))->
-      set(kEnumCacheBridgeIndicesCacheIndex, new_index_cache);
-  } else {
-    if (IsEmpty()) return;  // Do nothing for empty descriptor array.
-    FixedArray::cast(bridge_storage)->
-      set(kEnumCacheBridgeCacheIndex, new_cache);
-    FixedArray::cast(bridge_storage)->
-      set(kEnumCacheBridgeIndicesCacheIndex, new_index_cache);
-    set(kEnumCacheIndex, bridge_storage);
-  }
+  ASSERT(!IsEmpty());
+  ASSERT(!HasEnumCache() || new_cache->length() > GetEnumCache()->length());
+  FixedArray::cast(bridge_storage)->
+    set(kEnumCacheBridgeCacheIndex, new_cache);
+  FixedArray::cast(bridge_storage)->
+    set(kEnumCacheBridgeIndicesCacheIndex, new_index_cache);
+  set(kEnumCacheIndex, bridge_storage);
 }
 
 
@@ -5948,6 +6479,7 @@ void DescriptorArray::Sort() {
       parent_index = child_index;
     }
   }
+  ASSERT(IsSortedNoDuplicates());
 }
 
 
@@ -6025,10 +6557,10 @@ String::FlatContent String::GetFlatContent() {
     ASSERT(shape.representation_tag() != kConsStringTag &&
            shape.representation_tag() != kSlicedStringTag);
   }
-  if (shape.encoding_tag() == kAsciiStringTag) {
+  if (shape.encoding_tag() == kOneByteStringTag) {
     const char* start;
     if (shape.representation_tag() == kSeqStringTag) {
-      start = SeqAsciiString::cast(string)->GetChars();
+      start = SeqOneByteString::cast(string)->GetChars();
     } else {
       start = ExternalAsciiString::cast(string)->GetChars();
     }
@@ -6111,7 +6643,7 @@ const uc16* String::GetTwoByteData() {
 
 
 const uc16* String::GetTwoByteData(unsigned start) {
-  ASSERT(!IsAsciiRepresentationUnderneath());
+  ASSERT(!IsOneByteRepresentationUnderneath());
   switch (StringShape(this).representation_tag()) {
     case kSeqStringTag:
       return SeqTwoByteString::cast(this)->SeqTwoByteStringGetData(start);
@@ -6192,7 +6724,7 @@ void SeqTwoByteString::SeqTwoByteStringReadBlockIntoBuffer(ReadBlockBuffer* rbb,
 }
 
 
-const unibrow::byte* SeqAsciiString::SeqAsciiStringReadBlock(
+const unibrow::byte* SeqOneByteString::SeqOneByteStringReadBlock(
     unsigned* remaining,
     unsigned* offset_ptr,
     unsigned max_chars) {
@@ -6320,7 +6852,7 @@ void ExternalTwoByteString::ExternalTwoByteStringReadBlockIntoBuffer(
 }
 
 
-void SeqAsciiString::SeqAsciiStringReadBlockIntoBuffer(ReadBlockBuffer* rbb,
+void SeqOneByteString::SeqOneByteStringReadBlockIntoBuffer(ReadBlockBuffer* rbb,
                                                  unsigned* offset_ptr,
                                                  unsigned max_chars) {
   unsigned capacity = rbb->capacity - rbb->cursor;
@@ -6363,9 +6895,9 @@ const unibrow::byte* String::ReadBlock(String* input,
   }
   switch (StringShape(input).representation_tag()) {
     case kSeqStringTag:
-      if (input->IsAsciiRepresentation()) {
-        SeqAsciiString* str = SeqAsciiString::cast(input);
-        return str->SeqAsciiStringReadBlock(&rbb->remaining,
+      if (input->IsOneByteRepresentation()) {
+        SeqOneByteString* str = SeqOneByteString::cast(input);
+        return str->SeqOneByteStringReadBlock(&rbb->remaining,
                                             offset_ptr,
                                             max_chars);
       } else {
@@ -6380,7 +6912,7 @@ const unibrow::byte* String::ReadBlock(String* input,
                                                           offset_ptr,
                                                           max_chars);
     case kExternalStringTag:
-      if (input->IsAsciiRepresentation()) {
+      if (input->IsOneByteRepresentation()) {
         return ExternalAsciiString::cast(input)->ExternalAsciiStringReadBlock(
             &rbb->remaining,
             offset_ptr,
@@ -6494,8 +7026,128 @@ void StringInputBuffer::Seek(unsigned pos) {
 }
 
 
-void SafeStringInputBuffer::Seek(unsigned pos) {
-  Reset(pos, input_);
+String* ConsStringIteratorOp::Operate(ConsString* consString,
+    unsigned* outerOffset, int32_t* typeOut, unsigned* lengthOut) {
+  ASSERT(*lengthOut == (unsigned)consString->length());
+  // Push the root string.
+  PushLeft(consString);
+  root_ = consString;
+  root_type_ = *typeOut;
+  root_length_ = *lengthOut;
+  unsigned targetOffset = *outerOffset;
+  unsigned offset = 0;
+  while (true) {
+    // Loop until the string is found which contains the target offset.
+    String* string = consString->first();
+    unsigned length = string->length();
+    int32_t type;
+    if (targetOffset < offset + length) {
+      // Target offset is in the left branch.
+      // Mark the descent.
+      ClearRightDescent();
+      // Keep going if we're still in a ConString.
+      type = string->map()->instance_type();
+      if ((type & kStringRepresentationMask) == kConsStringTag) {
+        consString = ConsString::cast(string);
+        PushLeft(consString);
+        continue;
+      }
+    } else {
+      // Descend right.
+      // Update progress through the string.
+      offset += length;
+      // Keep going if we're still in a ConString.
+      string = consString->second();
+      type = string->map()->instance_type();
+      if ((type & kStringRepresentationMask) == kConsStringTag) {
+        consString = ConsString::cast(string);
+        PushRight(consString, type);
+        continue;
+      }
+      // Mark the descent.
+      SetRightDescent();
+      // Need this to be updated for the current string.
+      length = string->length();
+      // Account for the possibility of an empty right leaf.
+      while (length == 0) {
+        bool blewStack;
+        // Need to adjust maximum depth for NextLeaf to work.
+        AdjustMaximumDepth();
+        string = NextLeaf(&blewStack, &type);
+        if (string == NULL) {
+          // Luckily, this case is impossible.
+          ASSERT(!blewStack);
+          return NULL;
+        }
+        length = string->length();
+      }
+    }
+    // Tell the stack we're done decending.
+    AdjustMaximumDepth();
+    ASSERT(length != 0);
+    // Adjust return values and exit.
+    unsigned innerOffset = targetOffset - offset;
+    consumed_ += length - innerOffset;
+    *outerOffset = innerOffset;
+    *typeOut = type;
+    *lengthOut = length;
+    return string;
+  }
+  UNREACHABLE();
+  return NULL;
+}
+
+
+String* ConsStringIteratorOp::NextLeaf(bool* blewStack, int32_t* typeOut) {
+  while (true) {
+    // Tree traversal complete.
+    if (depth_ == 0) {
+      *blewStack = false;
+      return NULL;
+    }
+    // We've lost track of higher nodes.
+    if (maximum_depth_ - depth_ == kStackSize) {
+      *blewStack = true;
+      return NULL;
+    }
+    // Check if we're done with this level.
+    bool haveAlreadyReadRight = trace_ & MaskForDepth(depth_ - 1);
+    if (haveAlreadyReadRight) {
+      Pop();
+      continue;
+    }
+    // Go right.
+    ConsString* consString = frames_[OffsetForDepth(depth_ - 1)];
+    String* string = consString->second();
+    int32_t type = string->map()->instance_type();
+    if ((type & kStringRepresentationMask) != kConsStringTag) {
+      // Don't need to mark the descent here.
+      // Pop stack so next iteration is in correct place.
+      Pop();
+      *typeOut = type;
+      return string;
+    }
+    // No need to mark the descent.
+    consString = ConsString::cast(string);
+    PushRight(consString, type);
+    // Need to traverse all the way left.
+    while (true) {
+      // Continue left.
+      // Update marker.
+      ClearRightDescent();
+      string = consString->first();
+      type = string->map()->instance_type();
+      if ((type & kStringRepresentationMask) != kConsStringTag) {
+        AdjustMaximumDepth();
+        *typeOut = type;
+        return string;
+      }
+      consString = ConsString::cast(string);
+      PushLeft(consString);
+    }
+  }
+  UNREACHABLE();
+  return NULL;
 }
 
 
@@ -6512,8 +7164,8 @@ void String::ReadBlockIntoBuffer(String* input,
 
   switch (StringShape(input).representation_tag()) {
     case kSeqStringTag:
-      if (input->IsAsciiRepresentation()) {
-        SeqAsciiString::cast(input)->SeqAsciiStringReadBlockIntoBuffer(rbb,
+      if (input->IsOneByteRepresentation()) {
+        SeqOneByteString::cast(input)->SeqOneByteStringReadBlockIntoBuffer(rbb,
                                                                  offset_ptr,
                                                                  max_chars);
         return;
@@ -6529,7 +7181,7 @@ void String::ReadBlockIntoBuffer(String* input,
                                                              max_chars);
       return;
     case kExternalStringTag:
-      if (input->IsAsciiRepresentation()) {
+      if (input->IsOneByteRepresentation()) {
         ExternalAsciiString::cast(input)->
             ExternalAsciiStringReadBlockIntoBuffer(rbb, offset_ptr, max_chars);
       } else {
@@ -6714,7 +7366,7 @@ void String::WriteToFlat(String* src,
   while (true) {
     ASSERT(0 <= from && from <= to && to <= source->length());
     switch (StringShape(source).full_representation_tag()) {
-      case kAsciiStringTag | kExternalStringTag: {
+      case kOneByteStringTag | kExternalStringTag: {
         CopyChars(sink,
                   ExternalAsciiString::cast(source)->GetChars() + from,
                   to - from);
@@ -6728,9 +7380,9 @@ void String::WriteToFlat(String* src,
                   to - from);
         return;
       }
-      case kAsciiStringTag | kSeqStringTag: {
+      case kOneByteStringTag | kSeqStringTag: {
         CopyChars(sink,
-                  SeqAsciiString::cast(source)->GetChars() + from,
+                  SeqOneByteString::cast(source)->GetChars() + from,
                   to - from);
         return;
       }
@@ -6740,7 +7392,7 @@ void String::WriteToFlat(String* src,
                   to - from);
         return;
       }
-      case kAsciiStringTag | kConsStringTag:
+      case kOneByteStringTag | kConsStringTag:
       case kTwoByteStringTag | kConsStringTag: {
         ConsString* cons_string = ConsString::cast(source);
         String* first = cons_string->first();
@@ -6765,9 +7417,9 @@ void String::WriteToFlat(String* src,
             // common case of sequential ascii right child.
             if (to - boundary == 1) {
               sink[boundary - from] = static_cast<sinkchar>(second->Get(0));
-            } else if (second->IsSeqAsciiString()) {
+            } else if (second->IsSeqOneByteString()) {
               CopyChars(sink + boundary - from,
-                        SeqAsciiString::cast(second)->GetChars(),
+                        SeqOneByteString::cast(second)->GetChars(),
                         to - boundary);
             } else {
               WriteToFlat(second,
@@ -6781,7 +7433,7 @@ void String::WriteToFlat(String* src,
         }
         break;
       }
-      case kAsciiStringTag | kSlicedStringTag:
+      case kOneByteStringTag | kSlicedStringTag:
       case kTwoByteStringTag | kSlicedStringTag: {
         SlicedString* slice = SlicedString::cast(source);
         unsigned offset = slice->offset();
@@ -6906,8 +7558,8 @@ bool String::SlowEquals(String* other) {
 
   if (StringShape(lhs).IsSequentialAscii() &&
       StringShape(rhs).IsSequentialAscii()) {
-    const char* str1 = SeqAsciiString::cast(lhs)->GetChars();
-    const char* str2 = SeqAsciiString::cast(rhs)->GetChars();
+    const char* str1 = SeqOneByteString::cast(lhs)->GetChars();
+    const char* str2 = SeqOneByteString::cast(rhs)->GetChars();
     return CompareRawStringContents(Vector<const char>(str1, len),
                                     Vector<const char>(str2, len));
   }
@@ -7035,7 +7687,7 @@ uint32_t String::ComputeAndSetHash() {
   // Compute the hash code.
   uint32_t field = 0;
   if (StringShape(this).IsSequentialAscii()) {
-    field = HashSequentialString(SeqAsciiString::cast(this)->GetChars(),
+    field = HashSequentialString(SeqOneByteString::cast(this)->GetChars(),
                                  len,
                                  GetHeap()->HashSeed());
   } else if (StringShape(this).IsSequentialTwoByte()) {
@@ -7103,6 +7755,36 @@ bool String::SlowAsArrayIndex(uint32_t* index) {
 }
 
 
+String* SeqString::Truncate(int new_length) {
+  Heap* heap = GetHeap();
+  if (new_length <= 0) return heap->empty_string();
+
+  int string_size, allocated_string_size;
+  int old_length = length();
+  if (old_length <= new_length) return this;
+
+  if (IsSeqOneByteString()) {
+    allocated_string_size = SeqOneByteString::SizeFor(old_length);
+    string_size = SeqOneByteString::SizeFor(new_length);
+  } else {
+    allocated_string_size = SeqTwoByteString::SizeFor(old_length);
+    string_size = SeqTwoByteString::SizeFor(new_length);
+  }
+
+  int delta = allocated_string_size - string_size;
+  set_length(new_length);
+
+  // String sizes are pointer size aligned, so that we can use filler objects
+  // that are a multiple of pointer size.
+  Address end_of_string = address() + string_size;
+  heap->CreateFillerObjectAt(end_of_string, delta);
+  if (Marking::IsBlack(Marking::MarkBitFrom(this))) {
+    MemoryChunk::IncrementLiveBytesFromMutator(address(), -delta);
+  }
+  return this;
+}
+
+
 uint32_t StringHasher::MakeArrayIndexHash(uint32_t value, int length) {
   // For array indexes mix the length into the hash as an array index could
   // be zero.
@@ -7138,7 +7820,6 @@ void StringHasher::AddSurrogatePairNoIndex(uc32 c) {
 
 
 uint32_t StringHasher::GetHashField() {
-  ASSERT(is_valid());
   if (length_ <= String::kMaxHashCalcLength) {
     if (is_array_index()) {
       return MakeArrayIndexHash(array_index(), length_);
@@ -7193,13 +7874,46 @@ void String::PrintOn(FILE* file) {
 }
 
 
+static void TrimEnumCache(Heap* heap, Map* map, DescriptorArray* descriptors) {
+  int live_enum = map->EnumLength();
+  if (live_enum == Map::kInvalidEnumCache) {
+    live_enum = map->NumberOfDescribedProperties(OWN_DESCRIPTORS, DONT_ENUM);
+  }
+  if (live_enum == 0) return descriptors->ClearEnumCache();
+
+  FixedArray* enum_cache = descriptors->GetEnumCache();
+
+  int to_trim = enum_cache->length() - live_enum;
+  if (to_trim <= 0) return;
+  RightTrimFixedArray<FROM_GC>(heap, descriptors->GetEnumCache(), to_trim);
+
+  if (!descriptors->HasEnumIndicesCache()) return;
+  FixedArray* enum_indices_cache = descriptors->GetEnumIndicesCache();
+  RightTrimFixedArray<FROM_GC>(heap, enum_indices_cache, to_trim);
+}
+
+
+static void TrimDescriptorArray(Heap* heap,
+                                Map* map,
+                                DescriptorArray* descriptors,
+                                int number_of_own_descriptors) {
+  int number_of_descriptors = descriptors->number_of_descriptors();
+  int to_trim = number_of_descriptors - number_of_own_descriptors;
+  if (to_trim <= 0) return;
+
+  RightTrimFixedArray<FROM_GC>(heap, descriptors, to_trim);
+  descriptors->SetNumberOfDescriptors(number_of_own_descriptors);
+
+  if (descriptors->HasEnumCache()) TrimEnumCache(heap, map, descriptors);
+  descriptors->Sort();
+}
+
+
 // Clear a possible back pointer in case the transition leads to a dead map.
 // Return true in case a back pointer has been cleared and false otherwise.
-static bool ClearBackPointer(Heap* heap, Object* target) {
-  ASSERT(target->IsMap());
-  Map* map = Map::cast(target);
-  if (Marking::MarkBitFrom(map).Get()) return false;
-  map->SetBackPointer(heap->undefined_value(), SKIP_WRITE_BARRIER);
+static bool ClearBackPointer(Heap* heap, Map* target) {
+  if (Marking::MarkBitFrom(target).Get()) return false;
+  target->SetBackPointer(heap->undefined_value(), SKIP_WRITE_BARRIER);
   return true;
 }
 
@@ -7218,9 +7932,17 @@ void Map::ClearNonLiveTransitions(Heap* heap) {
 
   int transition_index = 0;
 
+  DescriptorArray* descriptors = instance_descriptors();
+  bool descriptors_owner_died = false;
+
   // Compact all live descriptors to the left.
   for (int i = 0; i < t->number_of_transitions(); ++i) {
-    if (!ClearBackPointer(heap, t->GetTarget(i))) {
+    Map* target = t->GetTarget(i);
+    if (ClearBackPointer(heap, target)) {
+      if (target->instance_descriptors() == descriptors) {
+        descriptors_owner_died = true;
+      }
+    } else {
       if (i != transition_index) {
         String* key = t->GetKey(i);
         t->SetKey(transition_index, key);
@@ -7235,6 +7957,9 @@ void Map::ClearNonLiveTransitions(Heap* heap) {
 
   if (t->HasElementsTransition() &&
       ClearBackPointer(heap, t->elements_transition())) {
+    if (t->elements_transition()->instance_descriptors() == descriptors) {
+      descriptors_owner_died = true;
+    }
     t->ClearElementsTransition();
   } else {
     // If there are no transitions to be cleared, return.
@@ -7243,19 +7968,21 @@ void Map::ClearNonLiveTransitions(Heap* heap) {
     if (transition_index == t->number_of_transitions()) return;
   }
 
-  // If the final transition array does not contain any live transitions, remove
-  // the transition array from the map.
-  if (transition_index == 0 &&
-      !t->HasElementsTransition() &&
-      !t->HasPrototypeTransitions() &&
-      t->descriptors()->IsEmpty()) {
-    return ClearTransitions(heap);
+  int number_of_own_descriptors = NumberOfOwnDescriptors();
+
+  if (descriptors_owner_died) {
+    if (number_of_own_descriptors > 0) {
+      TrimDescriptorArray(heap, this, descriptors, number_of_own_descriptors);
+      ASSERT(descriptors->number_of_descriptors() == number_of_own_descriptors);
+    } else {
+      ASSERT(descriptors == GetHeap()->empty_descriptor_array());
+    }
   }
 
   int trim = t->number_of_transitions() - transition_index;
   if (trim > 0) {
-    RightTrimFixedArray<FROM_GC>(
-        heap, t, trim * TransitionArray::kTransitionSize);
+    RightTrimFixedArray<FROM_GC>(heap, t, t->IsSimpleTransition()
+        ? trim : trim * TransitionArray::kTransitionSize);
   }
 }
 
@@ -7289,6 +8016,7 @@ bool Map::EquivalentToForNormalization(Map* other,
     instance_type() == other->instance_type() &&
     bit_field() == other->bit_field() &&
     bit_field2() == other->bit_field2() &&
+    is_observed() == other->is_observed() &&
     function_with_prototype() == other->function_with_prototype();
 }
 
@@ -7469,6 +8197,35 @@ MaybeObject* JSObject::OptimizeAsPrototype() {
 }
 
 
+MUST_USE_RESULT static MaybeObject* CacheInitialJSArrayMaps(
+    Context* native_context, Map* initial_map) {
+  // Replace all of the cached initial array maps in the native context with
+  // the appropriate transitioned elements kind maps.
+  Heap* heap = native_context->GetHeap();
+  MaybeObject* maybe_maps =
+      heap->AllocateFixedArrayWithHoles(kElementsKindCount);
+  FixedArray* maps;
+  if (!maybe_maps->To(&maps)) return maybe_maps;
+
+  Map* current_map = initial_map;
+  ElementsKind kind = current_map->elements_kind();
+  ASSERT(kind == GetInitialFastElementsKind());
+  maps->set(kind, current_map);
+  for (int i = GetSequenceIndexFromFastElementsKind(kind) + 1;
+       i < kFastElementsKindCount; ++i) {
+    Map* new_map;
+    ElementsKind next_kind = GetFastElementsKindFromSequenceIndex(i);
+    MaybeObject* maybe_new_map =
+        current_map->CopyAsElementsKind(next_kind, INSERT_TRANSITION);
+    if (!maybe_new_map->To(&new_map)) return maybe_new_map;
+    maps->set(next_kind, new_map);
+    current_map = new_map;
+  }
+  native_context->set_js_array_maps(maps);
+  return initial_map;
+}
+
+
 MaybeObject* JSFunction::SetInstancePrototype(Object* value) {
   ASSERT(value->IsJSReceiver());
   Heap* heap = GetHeap();
@@ -7483,14 +8240,29 @@ MaybeObject* JSFunction::SetInstancePrototype(Object* value) {
   // Now some logic for the maps of the objects that are created by using this
   // function as a constructor.
   if (has_initial_map()) {
-    // If the function has allocated the initial map
-    // replace it with a copy containing the new prototype.
+    // If the function has allocated the initial map replace it with a
+    // copy containing the new prototype.  Also complete any in-object
+    // slack tracking that is in progress at this point because it is
+    // still tracking the old copy.
+    if (shared()->IsInobjectSlackTrackingInProgress()) {
+      shared()->CompleteInobjectSlackTracking();
+    }
     Map* new_map;
-    MaybeObject* maybe_new_map = initial_map()->Copy();
-    if (!maybe_new_map->To(&new_map)) return maybe_new_map;
+    MaybeObject* maybe_object = initial_map()->Copy();
+    if (!maybe_object->To(&new_map)) return maybe_object;
     new_map->set_prototype(value);
-    MaybeObject* maybe_object = set_initial_map_and_cache_transitions(new_map);
-    if (maybe_object->IsFailure()) return maybe_object;
+
+    // If the function is used as the global Array function, cache the
+    // initial map (and transitioned versions) in the native context.
+    Context* native_context = context()->native_context();
+    Object* array_function = native_context->get(Context::ARRAY_FUNCTION_INDEX);
+    if (array_function->IsJSFunction() &&
+        this == JSFunction::cast(array_function)) {
+      MaybeObject* ok = CacheInitialJSArrayMaps(native_context, new_map);
+      if (ok->IsFailure()) return ok;
+    }
+
+    set_initial_map(new_map);
   } else {
     // Put the value in the initial map field until an initial map is
     // needed.  At that point, a new initial map is created and the
@@ -7875,7 +8647,7 @@ void SharedFunctionInfo::DetachInitialMap() {
   // constructor is called. The countdown will continue and (possibly after
   // several more GCs) CompleteInobjectSlackTracking will eventually be called.
   Heap* heap = map->GetHeap();
-  set_initial_map(heap->raw_unchecked_undefined_value());
+  set_initial_map(heap->undefined_value());
   Builtins* builtins = heap->isolate()->builtins();
   ASSERT_EQ(builtins->builtin(Builtins::kJSConstructStubCountdown),
             *RawField(this, kConstructStubOffset));
@@ -8003,6 +8775,15 @@ void ObjectVisitor::VisitCodeTarget(RelocInfo* rinfo) {
 }
 
 
+void ObjectVisitor::VisitCodeAgeSequence(RelocInfo* rinfo) {
+  ASSERT(RelocInfo::IsCodeAgeSequence(rinfo->rmode()));
+  Object* stub = rinfo->code_age_stub();
+  if (stub) {
+    VisitPointer(&stub);
+  }
+}
+
+
 void ObjectVisitor::VisitCodeEntry(Address entry_address) {
   Object* code = Code::GetObjectFromEntryAddress(entry_address);
   Object* old_code = code;
@@ -8197,6 +8978,7 @@ void Code::ClearInlineCaches() {
 
 
 void Code::ClearTypeFeedbackCells(Heap* heap) {
+  if (kind() != FUNCTION) return;
   Object* raw_info = type_feedback_info();
   if (raw_info->IsTypeFeedbackInfo()) {
     TypeFeedbackCells* type_feedback_cells =
@@ -8211,7 +8993,92 @@ void Code::ClearTypeFeedbackCells(Heap* heap) {
 
 bool Code::allowed_in_shared_map_code_cache() {
   return is_keyed_load_stub() || is_keyed_store_stub() ||
-      (is_compare_ic_stub() && compare_state() == CompareIC::KNOWN_OBJECTS);
+      (is_compare_ic_stub() &&
+       ICCompareStub::CompareState(stub_info()) == CompareIC::KNOWN_OBJECTS);
+}
+
+
+void Code::MakeCodeAgeSequenceYoung(byte* sequence) {
+  PatchPlatformCodeAge(sequence, kNoAge, NO_MARKING_PARITY);
+}
+
+
+void Code::MakeOlder(MarkingParity current_parity) {
+  byte* sequence = FindCodeAgeSequence();
+  if (sequence != NULL) {
+    Age age;
+    MarkingParity code_parity;
+    GetCodeAgeAndParity(sequence, &age, &code_parity);
+    if (age != kLastCodeAge && code_parity != current_parity) {
+      PatchPlatformCodeAge(sequence, static_cast<Age>(age + 1),
+                           current_parity);
+    }
+  }
+}
+
+
+bool Code::IsOld() {
+  byte* sequence = FindCodeAgeSequence();
+  if (sequence == NULL) return false;
+  Age age;
+  MarkingParity parity;
+  GetCodeAgeAndParity(sequence, &age, &parity);
+  return age >= kSexagenarianCodeAge;
+}
+
+
+byte* Code::FindCodeAgeSequence() {
+  return FLAG_age_code &&
+      prologue_offset() != kPrologueOffsetNotSet &&
+      (kind() == OPTIMIZED_FUNCTION ||
+       (kind() == FUNCTION && !has_debug_break_slots()))
+      ? instruction_start() + prologue_offset()
+      : NULL;
+}
+
+
+void Code::GetCodeAgeAndParity(Code* code, Age* age,
+                               MarkingParity* parity) {
+  Isolate* isolate = Isolate::Current();
+  Builtins* builtins = isolate->builtins();
+  Code* stub = NULL;
+#define HANDLE_CODE_AGE(AGE)                                            \
+  stub = *builtins->Make##AGE##CodeYoungAgainEvenMarking();             \
+  if (code == stub) {                                                   \
+    *age = k##AGE##CodeAge;                                             \
+    *parity = EVEN_MARKING_PARITY;                                      \
+    return;                                                             \
+  }                                                                     \
+  stub = *builtins->Make##AGE##CodeYoungAgainOddMarking();              \
+  if (code == stub) {                                                   \
+    *age = k##AGE##CodeAge;                                             \
+    *parity = ODD_MARKING_PARITY;                                       \
+    return;                                                             \
+  }
+  CODE_AGE_LIST(HANDLE_CODE_AGE)
+#undef HANDLE_CODE_AGE
+  UNREACHABLE();
+}
+
+
+Code* Code::GetCodeAgeStub(Age age, MarkingParity parity) {
+  Isolate* isolate = Isolate::Current();
+  Builtins* builtins = isolate->builtins();
+  switch (age) {
+#define HANDLE_CODE_AGE(AGE)                                            \
+    case k##AGE##CodeAge: {                                             \
+      Code* stub = parity == EVEN_MARKING_PARITY                        \
+          ? *builtins->Make##AGE##CodeYoungAgainEvenMarking()           \
+          : *builtins->Make##AGE##CodeYoungAgainOddMarking();           \
+      return stub;                                                      \
+    }
+    CODE_AGE_LIST(HANDLE_CODE_AGE)
+#undef HANDLE_CODE_AGE
+    default:
+      UNREACHABLE();
+      break;
+  }
+  return NULL;
 }
 
 
@@ -8473,11 +9340,15 @@ void Code::Disassemble(const char* name, FILE* out) {
       PrintF(out, "argc = %d\n", arguments_count());
     }
     if (is_compare_ic_stub()) {
-      CompareIC::State state = CompareIC::ComputeState(this);
-      PrintF(out, "compare_state = %s\n", CompareIC::GetStateName(state));
-    }
-    if (is_compare_ic_stub() && major_key() == CodeStub::CompareIC) {
-      Token::Value op = CompareIC::ComputeOperation(this);
+      ASSERT(major_key() == CodeStub::CompareIC);
+      CompareIC::State left_state, right_state, handler_state;
+      Token::Value op;
+      ICCompareStub::DecodeMinorKey(stub_info(), &left_state, &right_state,
+                                    &handler_state, &op);
+      PrintF(out, "compare_state = %s*%s -> %s\n",
+             CompareIC::GetStateName(left_state),
+             CompareIC::GetStateName(right_state),
+             CompareIC::GetStateName(handler_state));
       PrintF(out, "compare_operation = %s\n", Token::Name(op));
     }
   }
@@ -8523,8 +9394,6 @@ void Code::Disassemble(const char* name, FILE* out) {
       PrintF(out, "\n");
     }
     PrintF(out, "\n");
-    // Just print if type feedback info is ever used for optimized code.
-    ASSERT(type_feedback_info()->IsUndefined());
   } else if (kind() == FUNCTION) {
     unsigned offset = stack_check_table_offset();
     // If there is no stack check table, the "table start" will at or after
@@ -8566,9 +9435,8 @@ MaybeObject* JSObject::SetFastElementsCapacityAndLength(
 
   // Allocate a new fast elements backing store.
   FixedArray* new_elements;
-  { MaybeObject* maybe = heap->AllocateFixedArrayWithHoles(capacity);
-    if (!maybe->To(&new_elements)) return maybe;
-  }
+  MaybeObject* maybe = heap->AllocateUninitializedFixedArray(capacity);
+  if (!maybe->To(&new_elements)) return maybe;
 
   ElementsKind elements_kind = GetElementsKind();
   ElementsKind new_elements_kind;
@@ -8592,10 +9460,10 @@ MaybeObject* JSObject::SetFastElementsCapacityAndLength(
   }
   FixedArrayBase* old_elements = elements();
   ElementsAccessor* accessor = ElementsAccessor::ForKind(elements_kind);
-  { MaybeObject* maybe_obj =
-        accessor->CopyElements(this, new_elements, new_elements_kind);
-    if (maybe_obj->IsFailure()) return maybe_obj;
-  }
+  MaybeObject* maybe_obj =
+      accessor->CopyElements(this, new_elements, new_elements_kind);
+  if (maybe_obj->IsFailure()) return maybe_obj;
+
   if (elements_kind != NON_STRICT_ARGUMENTS_ELEMENTS) {
     Map* new_map = map();
     if (new_elements_kind != elements_kind) {
@@ -8701,7 +9569,53 @@ void JSArray::Expand(int required_size) {
 MaybeObject* JSArray::SetElementsLength(Object* len) {
   // We should never end in here with a pixel or external array.
   ASSERT(AllowsSetElementsLength());
-  return GetElementsAccessor()->SetLength(this, len);
+  if (!(FLAG_harmony_observation && map()->is_observed()))
+    return GetElementsAccessor()->SetLength(this, len);
+
+  Isolate* isolate = GetIsolate();
+  HandleScope scope(isolate);
+  Handle<JSArray> self(this);
+  List<Handle<String> > indices;
+  List<Handle<Object> > old_values;
+  Handle<Object> old_length_handle(self->length());
+  Handle<Object> new_length_handle(len);
+  uint32_t old_length = 0;
+  CHECK(old_length_handle->ToArrayIndex(&old_length));
+  uint32_t new_length = 0;
+  if (!new_length_handle->ToArrayIndex(&new_length))
+    return Failure::InternalError();
+
+  // TODO(adamk): This loop can be very slow for arrays in dictionary mode.
+  // Find another way to iterate over arrays with dictionary elements.
+  for (uint32_t i = old_length - 1; i + 1 > new_length; --i) {
+    PropertyAttributes attributes = self->GetLocalElementAttribute(i);
+    if (attributes == ABSENT) continue;
+    // A non-configurable property will cause the truncation operation to
+    // stop at this index.
+    if (attributes == DONT_DELETE) break;
+    old_values.Add(
+        self->GetLocalElementAccessorPair(i) == NULL
+        ? Object::GetElement(self, i)
+        : Handle<Object>::cast(isolate->factory()->the_hole_value()));
+    indices.Add(isolate->factory()->Uint32ToString(i));
+  }
+
+  MaybeObject* result =
+      self->GetElementsAccessor()->SetLength(*self, *new_length_handle);
+  Handle<Object> hresult;
+  if (!result->ToHandle(&hresult, isolate)) return result;
+
+  CHECK(self->length()->ToArrayIndex(&new_length));
+  if (old_length != new_length) {
+    for (int i = 0; i < indices.length(); ++i) {
+      JSObject::EnqueueChangeRecord(
+          self, "deleted", indices[i], old_values[i]);
+    }
+    JSObject::EnqueueChangeRecord(
+        self, "updated", isolate->factory()->length_symbol(),
+        old_length_handle);
+  }
+  return *hresult;
 }
 
 
@@ -8765,6 +9679,22 @@ MaybeObject* Map::PutPrototypeTransition(Object* prototype, Map* map) {
 }
 
 
+void Map::ZapTransitions() {
+  TransitionArray* transition_array = transitions();
+  MemsetPointer(transition_array->data_start(),
+                GetHeap()->the_hole_value(),
+                transition_array->length());
+}
+
+
+void Map::ZapPrototypeTransitions() {
+  FixedArray* proto_transitions = GetPrototypeTransitions();
+  MemsetPointer(proto_transitions->data_start(),
+                GetHeap()->the_hole_value(),
+                proto_transitions->length());
+}
+
+
 MaybeObject* JSReceiver::SetPrototype(Object* value,
                                       bool skip_hidden_prototypes) {
 #ifdef DEBUG
@@ -8862,203 +9792,51 @@ MaybeObject* JSObject::EnsureCanContainElements(Arguments* args,
 }
 
 
-bool JSObject::HasElementWithInterceptor(JSReceiver* receiver, uint32_t index) {
-  Isolate* isolate = GetIsolate();
-  // Make sure that the top context does not change when doing
-  // callbacks or interceptor calls.
-  AssertNoContextChange ncc;
-  HandleScope scope(isolate);
-  Handle<InterceptorInfo> interceptor(GetIndexedInterceptor());
-  Handle<JSReceiver> receiver_handle(receiver);
-  Handle<JSObject> holder_handle(this);
-  CustomArguments args(isolate, interceptor->data(), receiver, this);
-  v8::AccessorInfo info(args.end());
-  if (!interceptor->query()->IsUndefined()) {
-    v8::IndexedPropertyQuery query =
-        v8::ToCData<v8::IndexedPropertyQuery>(interceptor->query());
-    LOG(isolate,
-        ApiIndexedPropertyAccess("interceptor-indexed-has", this, index));
-    v8::Handle<v8::Integer> result;
-    {
-      // Leaving JavaScript.
-      VMState state(isolate, EXTERNAL);
-      result = query(index, info);
-    }
-    if (!result.IsEmpty()) {
-      ASSERT(result->IsInt32());
-      return true;  // absence of property is signaled by empty handle.
-    }
-  } else if (!interceptor->getter()->IsUndefined()) {
-    v8::IndexedPropertyGetter getter =
-        v8::ToCData<v8::IndexedPropertyGetter>(interceptor->getter());
-    LOG(isolate,
-        ApiIndexedPropertyAccess("interceptor-indexed-has-get", this, index));
-    v8::Handle<v8::Value> result;
-    {
-      // Leaving JavaScript.
-      VMState state(isolate, EXTERNAL);
-      result = getter(index, info);
-    }
-    if (!result.IsEmpty()) return true;
+PropertyType JSObject::GetLocalPropertyType(String* name) {
+  uint32_t index = 0;
+  if (name->AsArrayIndex(&index)) {
+    return GetLocalElementType(index);
   }
+  LookupResult lookup(GetIsolate());
+  LocalLookup(name, &lookup, true);
+  return lookup.type();
+}
 
-  if (holder_handle->GetElementsAccessor()->HasElement(
-          *receiver_handle, *holder_handle, index)) {
-    return true;
-  }
 
-  if (holder_handle->IsStringObjectWithCharacterAt(index)) return true;
-  Object* pt = holder_handle->GetPrototype();
-  if (pt->IsJSProxy()) {
-    // We need to follow the spec and simulate a call to [[GetOwnProperty]].
-    return JSProxy::cast(pt)->GetElementAttributeWithHandler(
-        receiver, index) != ABSENT;
-  }
-  if (pt->IsNull()) return false;
-  return JSObject::cast(pt)->HasElementWithReceiver(*receiver_handle, index);
+PropertyType JSObject::GetLocalElementType(uint32_t index) {
+  return GetElementsAccessor()->GetType(this, this, index);
 }
 
 
-JSObject::LocalElementType JSObject::HasLocalElement(uint32_t index) {
-  // Check access rights if needed.
-  if (IsAccessCheckNeeded()) {
-    Heap* heap = GetHeap();
-    if (!heap->isolate()->MayIndexedAccess(this, index, v8::ACCESS_HAS)) {
-      heap->isolate()->ReportFailedAccessCheck(this, v8::ACCESS_HAS);
-      return UNDEFINED_ELEMENT;
-    }
-  }
-
-  if (IsJSGlobalProxy()) {
-    Object* proto = GetPrototype();
-    if (proto->IsNull()) return UNDEFINED_ELEMENT;
-    ASSERT(proto->IsJSGlobalObject());
-    return JSObject::cast(proto)->HasLocalElement(index);
+AccessorPair* JSObject::GetLocalPropertyAccessorPair(String* name) {
+  uint32_t index = 0;
+  if (name->AsArrayIndex(&index)) {
+    return GetLocalElementAccessorPair(index);
   }
 
-  // Check for lookup interceptor
-  if (HasIndexedInterceptor()) {
-    return HasElementWithInterceptor(this, index) ? INTERCEPTED_ELEMENT
-                                                  : UNDEFINED_ELEMENT;
-  }
+  LookupResult lookup(GetIsolate());
+  LocalLookupRealNamedProperty(name, &lookup);
 
-  // Handle [] on String objects.
-  if (this->IsStringObjectWithCharacterAt(index)) {
-    return STRING_CHARACTER_ELEMENT;
-  }
-
-  switch (GetElementsKind()) {
-    case FAST_SMI_ELEMENTS:
-    case FAST_ELEMENTS:
-    case FAST_HOLEY_SMI_ELEMENTS:
-    case FAST_HOLEY_ELEMENTS: {
-      uint32_t length = IsJSArray() ?
-          static_cast<uint32_t>
-              (Smi::cast(JSArray::cast(this)->length())->value()) :
-          static_cast<uint32_t>(FixedArray::cast(elements())->length());
-      if ((index < length) &&
-          !FixedArray::cast(elements())->get(index)->IsTheHole()) {
-        return FAST_ELEMENT;
-      }
-      break;
-    }
-    case FAST_DOUBLE_ELEMENTS:
-    case FAST_HOLEY_DOUBLE_ELEMENTS: {
-      uint32_t length = IsJSArray() ?
-          static_cast<uint32_t>
-              (Smi::cast(JSArray::cast(this)->length())->value()) :
-          static_cast<uint32_t>(FixedDoubleArray::cast(elements())->length());
-      if ((index < length) &&
-          !FixedDoubleArray::cast(elements())->is_the_hole(index)) {
-        return FAST_ELEMENT;
-      }
-      break;
-    }
-    case EXTERNAL_PIXEL_ELEMENTS: {
-      ExternalPixelArray* pixels = ExternalPixelArray::cast(elements());
-      if (index < static_cast<uint32_t>(pixels->length())) return FAST_ELEMENT;
-      break;
-    }
-    case EXTERNAL_BYTE_ELEMENTS:
-    case EXTERNAL_UNSIGNED_BYTE_ELEMENTS:
-    case EXTERNAL_SHORT_ELEMENTS:
-    case EXTERNAL_UNSIGNED_SHORT_ELEMENTS:
-    case EXTERNAL_INT_ELEMENTS:
-    case EXTERNAL_UNSIGNED_INT_ELEMENTS:
-    case EXTERNAL_FLOAT_ELEMENTS:
-    case EXTERNAL_DOUBLE_ELEMENTS: {
-      ExternalArray* array = ExternalArray::cast(elements());
-      if (index < static_cast<uint32_t>(array->length())) return FAST_ELEMENT;
-      break;
-    }
-    case DICTIONARY_ELEMENTS: {
-      if (element_dictionary()->FindEntry(index) !=
-          SeededNumberDictionary::kNotFound) {
-        return DICTIONARY_ELEMENT;
-      }
-      break;
-    }
-    case NON_STRICT_ARGUMENTS_ELEMENTS: {
-      // Aliased parameters and non-aliased elements in a fast backing store
-      // behave as FAST_ELEMENT.  Non-aliased elements in a dictionary
-      // backing store behave as DICTIONARY_ELEMENT.
-      FixedArray* parameter_map = FixedArray::cast(elements());
-      uint32_t length = parameter_map->length();
-      Object* probe =
-          index < (length - 2) ? parameter_map->get(index + 2) : NULL;
-      if (probe != NULL && !probe->IsTheHole()) return FAST_ELEMENT;
-      // If not aliased, check the arguments.
-      FixedArray* arguments = FixedArray::cast(parameter_map->get(1));
-      if (arguments->IsDictionary()) {
-        SeededNumberDictionary* dictionary =
-            SeededNumberDictionary::cast(arguments);
-        if (dictionary->FindEntry(index) != SeededNumberDictionary::kNotFound) {
-          return DICTIONARY_ELEMENT;
-        }
-      } else {
-        length = arguments->length();
-        probe = (index < length) ? arguments->get(index) : NULL;
-        if (probe != NULL && !probe->IsTheHole()) return FAST_ELEMENT;
-      }
-      break;
-    }
+  if (lookup.IsPropertyCallbacks() &&
+      lookup.GetCallbackObject()->IsAccessorPair()) {
+    return AccessorPair::cast(lookup.GetCallbackObject());
   }
-
-  return UNDEFINED_ELEMENT;
+  return NULL;
 }
 
 
-bool JSObject::HasElementWithReceiver(JSReceiver* receiver, uint32_t index) {
-  // Check access rights if needed.
-  if (IsAccessCheckNeeded()) {
-    Heap* heap = GetHeap();
-    if (!heap->isolate()->MayIndexedAccess(this, index, v8::ACCESS_HAS)) {
-      heap->isolate()->ReportFailedAccessCheck(this, v8::ACCESS_HAS);
-      return false;
-    }
-  }
-
-  // Check for lookup interceptor
-  if (HasIndexedInterceptor()) {
-    return HasElementWithInterceptor(receiver, index);
-  }
-
-  ElementsAccessor* accessor = GetElementsAccessor();
-  if (accessor->HasElement(receiver, this, index)) {
-    return true;
+AccessorPair* JSObject::GetLocalElementAccessorPair(uint32_t index) {
+  if (IsJSGlobalProxy()) {
+    Object* proto = GetPrototype();
+    if (proto->IsNull()) return NULL;
+    ASSERT(proto->IsJSGlobalObject());
+    return JSObject::cast(proto)->GetLocalElementAccessorPair(index);
   }
 
-  // Handle [] on String objects.
-  if (this->IsStringObjectWithCharacterAt(index)) return true;
+  // Check for lookup interceptor.
+  if (HasIndexedInterceptor()) return NULL;
 
-  Object* pt = GetPrototype();
-  if (pt->IsNull()) return false;
-  if (pt->IsJSProxy()) {
-    // We need to follow the spec and simulate a call to [[GetOwnProperty]].
-    return JSProxy::cast(pt)->GetElementAttributeWithHandler(
-        receiver, index) != ABSENT;
-  }
-  return JSObject::cast(pt)->HasElementWithReceiver(receiver, index);
+  return GetElementsAccessor()->GetAccessorPair(this, this, index);
 }
 
 
@@ -9367,7 +10145,7 @@ MaybeObject* JSObject::SetFastElement(uint32_t index,
 
 
 MaybeObject* JSObject::SetDictionaryElement(uint32_t index,
-                                            Object* value,
+                                            Object* value_raw,
                                             PropertyAttributes attributes,
                                             StrictModeFlag strict_mode,
                                             bool check_prototype,
@@ -9375,24 +10153,23 @@ MaybeObject* JSObject::SetDictionaryElement(uint32_t index,
   ASSERT(HasDictionaryElements() || HasDictionaryArgumentsElements());
   Isolate* isolate = GetIsolate();
   Heap* heap = isolate->heap();
+  Handle<JSObject> self(this);
+  Handle<Object> value(value_raw);
 
   // Insert element in the dictionary.
-  FixedArray* elements = FixedArray::cast(this->elements());
+  Handle<FixedArray> elements(FixedArray::cast(this->elements()));
   bool is_arguments =
       (elements->map() == heap->non_strict_arguments_elements_map());
-  SeededNumberDictionary* dictionary = NULL;
-  if (is_arguments) {
-    dictionary = SeededNumberDictionary::cast(elements->get(1));
-  } else {
-    dictionary = SeededNumberDictionary::cast(elements);
-  }
+  Handle<SeededNumberDictionary> dictionary(is_arguments
+    ? SeededNumberDictionary::cast(elements->get(1))
+    : SeededNumberDictionary::cast(*elements));
 
   int entry = dictionary->FindEntry(index);
   if (entry != SeededNumberDictionary::kNotFound) {
     Object* element = dictionary->ValueAt(entry);
     PropertyDetails details = dictionary->DetailsAt(entry);
     if (details.type() == CALLBACKS && set_mode == SET_PROPERTY) {
-      return SetElementWithCallback(element, index, value, this, strict_mode);
+      return SetElementWithCallback(element, index, *value, this, strict_mode);
     } else {
       dictionary->UpdateMaxNumberKey(index);
       // If a value has not been initialized we allow writing to it even if it
@@ -9421,24 +10198,24 @@ MaybeObject* JSObject::SetDictionaryElement(uint32_t index,
         Context* context = Context::cast(elements->get(0));
         int context_index = entry->aliased_context_slot();
         ASSERT(!context->get(context_index)->IsTheHole());
-        context->set(context_index, value);
+        context->set(context_index, *value);
         // For elements that are still writable we keep slow aliasing.
-        if (!details.IsReadOnly()) value = element;
+        if (!details.IsReadOnly()) value = handle(element, isolate);
       }
-      dictionary->ValueAtPut(entry, value);
+      dictionary->ValueAtPut(entry, *value);
     }
   } else {
     // Index not already used. Look for an accessor in the prototype chain.
+    // Can cause GC!
     if (check_prototype) {
       bool found;
-      MaybeObject* result =
-          SetElementWithCallbackSetterInPrototypes(
-              index, value, &found, strict_mode);
+      MaybeObject* result = SetElementWithCallbackSetterInPrototypes(
+          index, *value, &found, strict_mode);
       if (found) return result;
     }
     // When we set the is_extensible flag to false we always force the
     // element into dictionary mode (and force them to stay there).
-    if (!map()->is_extensible()) {
+    if (!self->map()->is_extensible()) {
       if (strict_mode == kNonStrictMode) {
         return isolate->heap()->undefined_value();
       } else {
@@ -9453,30 +10230,31 @@ MaybeObject* JSObject::SetDictionaryElement(uint32_t index,
     }
     FixedArrayBase* new_dictionary;
     PropertyDetails details = PropertyDetails(attributes, NORMAL);
-    MaybeObject* maybe = dictionary->AddNumberEntry(index, value, details);
+    MaybeObject* maybe = dictionary->AddNumberEntry(index, *value, details);
     if (!maybe->To(&new_dictionary)) return maybe;
-    if (dictionary != SeededNumberDictionary::cast(new_dictionary)) {
+    if (*dictionary != SeededNumberDictionary::cast(new_dictionary)) {
       if (is_arguments) {
         elements->set(1, new_dictionary);
       } else {
-        set_elements(new_dictionary);
+        self->set_elements(new_dictionary);
       }
-      dictionary = SeededNumberDictionary::cast(new_dictionary);
+      dictionary =
+          handle(SeededNumberDictionary::cast(new_dictionary), isolate);
     }
   }
 
   // Update the array length if this JSObject is an array.
-  if (IsJSArray()) {
+  if (self->IsJSArray()) {
     MaybeObject* result =
-        JSArray::cast(this)->JSArrayUpdateLengthFromIndex(index, value);
+        JSArray::cast(*self)->JSArrayUpdateLengthFromIndex(index, *value);
     if (result->IsFailure()) return result;
   }
 
   // Attempt to put this object back in fast case.
-  if (ShouldConvertToFastElements()) {
+  if (self->ShouldConvertToFastElements()) {
     uint32_t new_length = 0;
-    if (IsJSArray()) {
-      CHECK(JSArray::cast(this)->length()->ToArrayIndex(&new_length));
+    if (self->IsJSArray()) {
+      CHECK(JSArray::cast(*self)->length()->ToArrayIndex(&new_length));
     } else {
       new_length = dictionary->max_number_key() + 1;
     }
@@ -9485,16 +10263,15 @@ MaybeObject* JSObject::SetDictionaryElement(uint32_t index,
         : kDontAllowSmiElements;
     bool has_smi_only_elements = false;
     bool should_convert_to_fast_double_elements =
-        ShouldConvertToFastDoubleElements(&has_smi_only_elements);
+        self->ShouldConvertToFastDoubleElements(&has_smi_only_elements);
     if (has_smi_only_elements) {
       smi_mode = kForceSmiElements;
     }
     MaybeObject* result = should_convert_to_fast_double_elements
-        ? SetFastDoubleElementsCapacityAndLength(new_length, new_length)
-        : SetFastElementsCapacityAndLength(new_length,
-                                           new_length,
-                                           smi_mode);
-    ValidateElements();
+        ? self->SetFastDoubleElementsCapacityAndLength(new_length, new_length)
+        : self->SetFastElementsCapacityAndLength(
+            new_length, new_length, smi_mode);
+    self->ValidateElements();
     if (result->IsFailure()) return result;
 #ifdef DEBUG
     if (FLAG_trace_normalization) {
@@ -9503,7 +10280,7 @@ MaybeObject* JSObject::SetDictionaryElement(uint32_t index,
     }
 #endif
   }
-  return value;
+  return *value;
 }
 
 
@@ -9659,28 +10436,27 @@ Handle<Object> JSObject::SetElement(Handle<JSObject> object,
 
 
 MaybeObject* JSObject::SetElement(uint32_t index,
-                                  Object* value,
+                                  Object* value_raw,
                                   PropertyAttributes attributes,
                                   StrictModeFlag strict_mode,
                                   bool check_prototype,
                                   SetPropertyMode set_mode) {
+  Isolate* isolate = GetIsolate();
+
   // Check access rights if needed.
   if (IsAccessCheckNeeded()) {
-    Heap* heap = GetHeap();
-    if (!heap->isolate()->MayIndexedAccess(this, index, v8::ACCESS_SET)) {
-      HandleScope scope(heap->isolate());
-      Handle<Object> value_handle(value);
-      heap->isolate()->ReportFailedAccessCheck(this, v8::ACCESS_SET);
-      return *value_handle;
+    if (!isolate->MayIndexedAccess(this, index, v8::ACCESS_SET)) {
+      isolate->ReportFailedAccessCheck(this, v8::ACCESS_SET);
+      return value_raw;
     }
   }
 
   if (IsJSGlobalProxy()) {
     Object* proto = GetPrototype();
-    if (proto->IsNull()) return value;
+    if (proto->IsNull()) return value_raw;
     ASSERT(proto->IsJSGlobalObject());
     return JSObject::cast(proto)->SetElement(index,
-                                             value,
+                                             value_raw,
                                              attributes,
                                              strict_mode,
                                              check_prototype,
@@ -9689,10 +10465,8 @@ MaybeObject* JSObject::SetElement(uint32_t index,
 
   // Don't allow element properties to be redefined for external arrays.
   if (HasExternalArrayElements() && set_mode == DEFINE_PROPERTY) {
-    Isolate* isolate = GetHeap()->isolate();
-    Handle<Object> receiver(this);
     Handle<Object> number = isolate->factory()->NewNumberFromUint(index);
-    Handle<Object> args[] = { receiver, number };
+    Handle<Object> args[] = { handle(this, isolate), number };
     Handle<Object> error = isolate->factory()->NewTypeError(
         "redef_external_array_element", HandleVector(args, ARRAY_SIZE(args)));
     return isolate->Throw(*error);
@@ -9707,22 +10481,55 @@ MaybeObject* JSObject::SetElement(uint32_t index,
     dictionary->set_requires_slow_elements();
   }
 
+  if (!(FLAG_harmony_observation && map()->is_observed())) {
+    return HasIndexedInterceptor()
+      ? SetElementWithInterceptor(
+          index, value_raw, attributes, strict_mode, check_prototype, set_mode)
+      : SetElementWithoutInterceptor(
+          index, value_raw, attributes, strict_mode, check_prototype, set_mode);
+  }
+
+  // From here on, everything has to be handlified.
+  Handle<JSObject> self(this);
+  Handle<Object> value(value_raw);
+  PropertyAttributes old_attributes = self->GetLocalElementAttribute(index);
+  Handle<Object> old_value = isolate->factory()->the_hole_value();
+  Handle<Object> old_length;
+
+  if (old_attributes != ABSENT) {
+    if (self->GetLocalElementAccessorPair(index) == NULL)
+      old_value = Object::GetElement(self, index);
+  } else if (self->IsJSArray()) {
+    // Store old array length in case adding an element grows the array.
+    old_length = handle(Handle<JSArray>::cast(self)->length(), isolate);
+  }
+
   // Check for lookup interceptor
-  if (HasIndexedInterceptor()) {
-    return SetElementWithInterceptor(index,
-                                     value,
-                                     attributes,
-                                     strict_mode,
-                                     check_prototype,
-                                     set_mode);
+  MaybeObject* result = self->HasIndexedInterceptor()
+    ? self->SetElementWithInterceptor(
+        index, *value, attributes, strict_mode, check_prototype, set_mode)
+    : self->SetElementWithoutInterceptor(
+        index, *value, attributes, strict_mode, check_prototype, set_mode);
+
+  Handle<Object> hresult;
+  if (!result->ToHandle(&hresult, isolate)) return result;
+
+  Handle<String> name = isolate->factory()->Uint32ToString(index);
+  PropertyAttributes new_attributes = self->GetLocalElementAttribute(index);
+  if (old_attributes == ABSENT) {
+    EnqueueChangeRecord(self, "new", name, old_value);
+    if (self->IsJSArray() &&
+        !old_length->SameValue(Handle<JSArray>::cast(self)->length())) {
+      EnqueueChangeRecord(
+          self, "updated", isolate->factory()->length_symbol(), old_length);
+    }
+  } else if (old_attributes != new_attributes || old_value->IsTheHole()) {
+    EnqueueChangeRecord(self, "reconfigured", name, old_value);
+  } else if (!old_value->SameValue(*Object::GetElement(self, index))) {
+    EnqueueChangeRecord(self, "updated", name, old_value);
   }
 
-  return SetElementWithoutInterceptor(index,
-                                      value,
-                                      attributes,
-                                      strict_mode,
-                                      check_prototype,
-                                      set_mode);
+  return *hresult;
 }
 
 
@@ -9838,6 +10645,8 @@ MaybeObject* JSObject::TransitionElementsKind(ElementsKind to_kind) {
     to_kind = GetHoleyElementsKind(to_kind);
   }
 
+  if (from_kind == to_kind) return this;
+
   Isolate* isolate = GetIsolate();
   if (elements() == isolate->heap()->empty_fixed_array() ||
       (IsFastSmiOrObjectElementsKind(from_kind) &&
@@ -10372,9 +11181,16 @@ bool JSObject::HasRealNamedCallbackProperty(String* key) {
 
 
 int JSObject::NumberOfLocalProperties(PropertyAttributes filter) {
-  return HasFastProperties() ?
-      map()->NumberOfDescribedProperties(filter) :
-      property_dictionary()->NumberOfElementsFilterAttributes(filter);
+  if (HasFastProperties()) {
+    Map* map = this->map();
+    if (filter == NONE) return map->NumberOfOwnDescriptors();
+    if (filter == DONT_ENUM) {
+      int result = map->EnumLength();
+      if (result != Map::kInvalidEnumCache) return result;
+    }
+    return map->NumberOfDescribedProperties(OWN_DESCRIPTORS, filter);
+  }
+  return property_dictionary()->NumberOfElementsFilterAttributes(filter);
 }
 
 
@@ -10497,9 +11313,10 @@ void FixedArray::SortPairs(FixedArray* numbers, uint32_t len) {
 void JSObject::GetLocalPropertyNames(FixedArray* storage, int index) {
   ASSERT(storage->length() >= (NumberOfLocalProperties() - index));
   if (HasFastProperties()) {
+    int real_size = map()->NumberOfOwnDescriptors();
     DescriptorArray* descs = map()->instance_descriptors();
-    ASSERT(storage->length() >= index + descs->number_of_descriptors());
-    for (int i = 0; i < descs->number_of_descriptors(); i++) {
+    ASSERT(storage->length() >= index + real_size);
+    for (int i = 0; i < real_size; i++) {
       storage->set(index + i, descs->GetKey(i));
     }
   } else {
@@ -10931,11 +11748,10 @@ class AsciiSymbolKey : public SequentialSymbolKey<char> {
 
 class SubStringAsciiSymbolKey : public HashTableKey {
  public:
-  explicit SubStringAsciiSymbolKey(Handle<SeqAsciiString> string,
+  explicit SubStringAsciiSymbolKey(Handle<SeqOneByteString> string,
                                    int from,
-                                   int length,
-                                   uint32_t seed)
-      : string_(string), from_(from), length_(length), seed_(seed) { }
+                                   int length)
+      : string_(string), from_(from), length_(length) { }
 
   uint32_t Hash() {
     ASSERT(length_ >= 0);
@@ -10952,7 +11768,7 @@ class SubStringAsciiSymbolKey : public HashTableKey {
       // chance this is an array index.
       while (i < length_ && hasher.is_array_index()) {
         hasher.AddCharacter(static_cast<uc32>(
-            string_->SeqAsciiStringGet(i + from_)));
+            string_->SeqOneByteStringGet(i + from_)));
         i++;
       }
 
@@ -10960,7 +11776,7 @@ class SubStringAsciiSymbolKey : public HashTableKey {
       // index.
       while (i < length_) {
         hasher.AddCharacterNoIndex(static_cast<uc32>(
-            string_->SeqAsciiStringGet(i + from_)));
+            string_->SeqOneByteStringGet(i + from_)));
         i++;
       }
       hash_field_ = hasher.GetHashField();
@@ -10988,11 +11804,10 @@ class SubStringAsciiSymbolKey : public HashTableKey {
   }
 
  private:
-  Handle<SeqAsciiString> string_;
+  Handle<SeqOneByteString> string_;
   int from_;
   int length_;
   uint32_t hash_field_;
-  uint32_t seed_;
 };
 
 
@@ -11827,7 +12642,7 @@ class TwoCharHashTableKey : public HashTableKey {
     hash += hash << 3;
     hash ^= hash >> 11;
     hash += hash << 15;
-    if ((hash & String::kHashBitMask) == 0) hash = String::kZeroHash;
+    if ((hash & String::kHashBitMask) == 0) hash = StringHasher::kZeroHash;
 #ifdef DEBUG
     StringHasher hasher(2, seed);
     hasher.AddCharacter(c1);
@@ -11913,11 +12728,12 @@ MaybeObject* SymbolTable::LookupAsciiSymbol(Vector<const char> str,
 }
 
 
-MaybeObject* SymbolTable::LookupSubStringAsciiSymbol(Handle<SeqAsciiString> str,
-                                                     int from,
-                                                     int length,
-                                                     Object** s) {
-  SubStringAsciiSymbolKey key(str, from, length, GetHeap()->HashSeed());
+MaybeObject* SymbolTable::LookupSubStringAsciiSymbol(
+    Handle<SeqOneByteString> str,
+    int from,
+    int length,
+    Object** s) {
+  SubStringAsciiSymbolKey key(str, from, length);
   return LookupKey(&key, s);
 }
 
@@ -12202,8 +13018,8 @@ MaybeObject* Dictionary<Shape, Key>::GenerateNewEnumerationIndices() {
   int pos = 0;
   for (int i = 0; i < capacity; i++) {
     if (Dictionary<Shape, Key>::IsKey(Dictionary<Shape, Key>::KeyAt(i))) {
-      enumeration_order->set(
-          pos++, Smi::FromInt(DetailsAt(i).dictionary_index()));
+      int index = DetailsAt(i).dictionary_index();
+      enumeration_order->set(pos++, Smi::FromInt(index));
     }
   }
 
@@ -12332,7 +13148,8 @@ MaybeObject* Dictionary<Shape, Key>::AddEntry(Key key,
   uint32_t entry = Dictionary<Shape, Key>::FindInsertionEntry(hash);
   // Insert element at empty or deleted entry
   if (!details.IsDeleted() &&
-      details.dictionary_index() == 0 && Shape::kIsEnumerable) {
+      details.dictionary_index() == 0 &&
+      Shape::kIsEnumerable) {
     // Assign an enumeration index to the property and update
     // SetNextEnumerationIndex.
     int index = NextEnumerationIndex();
@@ -12604,8 +13421,7 @@ MaybeObject* StringDictionary::TransformPropertiesToFastFor(
       PropertyType type = DetailsAt(i).type();
       ASSERT(type != FIELD);
       instance_descriptor_length++;
-      if (type == NORMAL &&
-          (!value->IsJSFunction() || heap->InNewSpace(value))) {
+      if (type == NORMAL && !value->IsJSFunction()) {
         number_of_fields += 1;
       }
     }
@@ -12638,7 +13454,7 @@ MaybeObject* StringDictionary::TransformPropertiesToFastFor(
     return maybe_descriptors;
   }
 
-  FixedArray::WhitenessWitness witness(descriptors);
+  DescriptorArray::WhitenessWitness witness(descriptors);
 
   int number_of_allocated_fields =
       number_of_fields + unused_property_fields - inobject_props;
@@ -12670,7 +13486,7 @@ MaybeObject* StringDictionary::TransformPropertiesToFastFor(
       int enumeration_index = details.descriptor_index();
       PropertyType type = details.type();
 
-      if (value->IsJSFunction() && !heap->InNewSpace(value)) {
+      if (value->IsJSFunction()) {
         ConstantFunctionDescriptor d(key,
                                      JSFunction::cast(value),
                                      details.attributes(),
@@ -12705,8 +13521,7 @@ MaybeObject* StringDictionary::TransformPropertiesToFastFor(
 
   descriptors->Sort();
 
-  MaybeObject* maybe_failure = new_map->InitializeDescriptors(descriptors);
-  if (maybe_failure->IsFailure()) return maybe_failure;
+  new_map->InitializeDescriptors(descriptors);
   new_map->set_unused_property_fields(unused_property_fields);
 
   // Transform the object.
diff --git a/deps/v8/src/objects.h b/deps/v8/src/objects.h
index 18e388f991..701712be32 100644
--- a/deps/v8/src/objects.h
+++ b/deps/v8/src/objects.h
@@ -97,7 +97,7 @@
 //           - ExternalFloatArray
 //       - String
 //         - SeqString
-//           - SeqAsciiString
+//           - SeqOneByteString
 //           - SeqTwoByteString
 //         - SlicedString
 //         - ConsString
@@ -178,6 +178,35 @@ enum TransitionFlag {
 };
 
 
+// Indicates whether the transition is simple: the target map of the transition
+// either extends the current map with a new property, or it modifies the
+// property that was added last to the current map.
+enum SimpleTransitionFlag {
+  SIMPLE_TRANSITION,
+  FULL_TRANSITION
+};
+
+
+// Indicates whether we are only interested in the descriptors of a particular
+// map, or in all descriptors in the descriptor array.
+enum DescriptorFlag {
+  ALL_DESCRIPTORS,
+  OWN_DESCRIPTORS
+};
+
+// The GC maintains a bit of information, the MarkingParity, which toggles
+// from odd to even and back every time marking is completed. Incremental
+// marking can visit an object twice during a marking phase, so algorithms that
+// that piggy-back on marking can use the parity to ensure that they only
+// perform an operation on an object once per marking phase: they record the
+// MarkingParity when they visit an object, and only re-visit the object when it
+// is marked again and the MarkingParity changes.
+enum MarkingParity {
+  NO_MARKING_PARITY,
+  ODD_MARKING_PARITY,
+  EVEN_MARKING_PARITY
+};
+
 // Instance size sentinel for objects of variable size.
 const int kVariableSizeSentinel = 0;
 
@@ -450,7 +479,7 @@ const uint32_t kSymbolTag = 0x40;
 // two-byte characters or one-byte characters.
 const uint32_t kStringEncodingMask = 0x4;
 const uint32_t kTwoByteStringTag = 0x0;
-const uint32_t kAsciiStringTag = 0x4;
+const uint32_t kOneByteStringTag = 0x4;
 
 // If bit 7 is clear, the low-order 2 bits indicate the representation
 // of the string.
@@ -501,39 +530,46 @@ const uint32_t kShortcutTypeTag = kConsStringTag;
 enum InstanceType {
   // String types.
   SYMBOL_TYPE = kTwoByteStringTag | kSymbolTag | kSeqStringTag,
-  ASCII_SYMBOL_TYPE = kAsciiStringTag | kSymbolTag | kSeqStringTag,
+  ASCII_SYMBOL_TYPE = kOneByteStringTag | kAsciiDataHintTag | kSymbolTag |
+                      kSeqStringTag,
   CONS_SYMBOL_TYPE = kTwoByteStringTag | kSymbolTag | kConsStringTag,
-  CONS_ASCII_SYMBOL_TYPE = kAsciiStringTag | kSymbolTag | kConsStringTag,
+  CONS_ASCII_SYMBOL_TYPE = kOneByteStringTag | kAsciiDataHintTag | kSymbolTag |
+                           kConsStringTag,
   SHORT_EXTERNAL_SYMBOL_TYPE = kTwoByteStringTag | kSymbolTag |
                                kExternalStringTag | kShortExternalStringTag,
   SHORT_EXTERNAL_SYMBOL_WITH_ASCII_DATA_TYPE =
       kTwoByteStringTag | kSymbolTag | kExternalStringTag |
       kAsciiDataHintTag | kShortExternalStringTag,
-  SHORT_EXTERNAL_ASCII_SYMBOL_TYPE = kAsciiStringTag | kExternalStringTag |
-                                     kSymbolTag | kShortExternalStringTag,
+  SHORT_EXTERNAL_ASCII_SYMBOL_TYPE = kOneByteStringTag | kAsciiDataHintTag |
+                                     kExternalStringTag | kSymbolTag |
+                                     kShortExternalStringTag,
   EXTERNAL_SYMBOL_TYPE = kTwoByteStringTag | kSymbolTag | kExternalStringTag,
   EXTERNAL_SYMBOL_WITH_ASCII_DATA_TYPE =
       kTwoByteStringTag | kSymbolTag | kExternalStringTag | kAsciiDataHintTag,
   EXTERNAL_ASCII_SYMBOL_TYPE =
-      kAsciiStringTag | kSymbolTag | kExternalStringTag,
+      kOneByteStringTag | kAsciiDataHintTag | kSymbolTag | kExternalStringTag,
   STRING_TYPE = kTwoByteStringTag | kSeqStringTag,
-  ASCII_STRING_TYPE = kAsciiStringTag | kSeqStringTag,
+  ASCII_STRING_TYPE = kOneByteStringTag | kAsciiDataHintTag | kSeqStringTag,
   CONS_STRING_TYPE = kTwoByteStringTag | kConsStringTag,
-  CONS_ASCII_STRING_TYPE = kAsciiStringTag | kConsStringTag,
+  CONS_ASCII_STRING_TYPE =
+      kOneByteStringTag | kAsciiDataHintTag | kConsStringTag,
   SLICED_STRING_TYPE = kTwoByteStringTag | kSlicedStringTag,
-  SLICED_ASCII_STRING_TYPE = kAsciiStringTag | kSlicedStringTag,
+  SLICED_ASCII_STRING_TYPE =
+      kOneByteStringTag | kAsciiDataHintTag | kSlicedStringTag,
   SHORT_EXTERNAL_STRING_TYPE =
       kTwoByteStringTag | kExternalStringTag | kShortExternalStringTag,
   SHORT_EXTERNAL_STRING_WITH_ASCII_DATA_TYPE =
       kTwoByteStringTag | kExternalStringTag |
       kAsciiDataHintTag | kShortExternalStringTag,
   SHORT_EXTERNAL_ASCII_STRING_TYPE =
-      kAsciiStringTag | kExternalStringTag | kShortExternalStringTag,
+      kOneByteStringTag | kAsciiDataHintTag |
+      kExternalStringTag | kShortExternalStringTag,
   EXTERNAL_STRING_TYPE = kTwoByteStringTag | kExternalStringTag,
   EXTERNAL_STRING_WITH_ASCII_DATA_TYPE =
       kTwoByteStringTag | kExternalStringTag | kAsciiDataHintTag,
   // LAST_STRING_TYPE
-  EXTERNAL_ASCII_STRING_TYPE = kAsciiStringTag | kExternalStringTag,
+  EXTERNAL_ASCII_STRING_TYPE =
+      kOneByteStringTag | kAsciiDataHintTag | kExternalStringTag,
   PRIVATE_EXTERNAL_ASCII_STRING_TYPE = EXTERNAL_ASCII_STRING_TYPE,
 
   // Objects allocated in their own spaces (never in new space).
@@ -714,6 +750,11 @@ struct ValueInfo : public Malloced {
 // A template-ized version of the IsXXX functions.
 template <class C> static inline bool Is(Object* obj);
 
+#ifdef VERIFY_HEAP
+#define DECLARE_VERIFIER(Name) void Name##Verify();
+#else
+#define DECLARE_VERIFIER(Name)
+#endif
 
 class MaybeObject BASE_EMBEDDED {
  public:
@@ -732,7 +773,9 @@ class MaybeObject BASE_EMBEDDED {
     return reinterpret_cast<Failure*>(this);
   }
   inline Object* ToObjectUnchecked() {
-    ASSERT(!IsFailure());
+    // TODO(jkummerow): Turn this back into an ASSERT when we can be certain
+    // that it never fires in Release mode in the wild.
+    CHECK(!IsFailure());
     return reinterpret_cast<Object*>(this);
   }
   inline Object* ToObjectChecked() {
@@ -747,6 +790,13 @@ class MaybeObject BASE_EMBEDDED {
     return true;
   }
 
+  template<typename T>
+    inline bool ToHandle(Handle<T>* obj, Isolate* isolate) {
+    if (IsFailure()) return false;
+    *obj = handle(T::cast(reinterpret_cast<Object*>(this)), isolate);
+    return true;
+  }
+
 #ifdef OBJECT_PRINT
   // Prints this object with details.
   inline void Print() {
@@ -758,7 +808,7 @@ class MaybeObject BASE_EMBEDDED {
   void Print(FILE* out);
   void PrintLn(FILE* out);
 #endif
-#ifdef DEBUG
+#ifdef VERIFY_HEAP
   // Verifies the object.
   void Verify();
 #endif
@@ -781,7 +831,7 @@ class MaybeObject BASE_EMBEDDED {
   V(ExternalTwoByteString)                     \
   V(ExternalAsciiString)                       \
   V(SeqTwoByteString)                          \
-  V(SeqAsciiString)                            \
+  V(SeqOneByteString)                            \
                                                \
   V(ExternalArray)                             \
   V(ExternalByteArray)                         \
@@ -844,6 +894,7 @@ class MaybeObject BASE_EMBEDDED {
   V(UndetectableObject)                        \
   V(AccessCheckNeeded)                         \
   V(JSGlobalPropertyCell)                      \
+  V(ObjectHashTable)                           \
 
 
 class JSReceiver;
@@ -865,6 +916,7 @@ class Object : public MaybeObject {
 #undef IS_TYPE_FUNCTION_DECL
 
   inline bool IsFixedArrayBase();
+  inline bool IsExternal();
 
   // Returns true if this object is an instance of the specified
   // function template.
@@ -923,6 +975,7 @@ class Object : public MaybeObject {
       String* key,
       PropertyAttributes* attributes);
 
+  static Handle<Object> GetProperty(Handle<Object> object, Handle<String> key);
   static Handle<Object> GetProperty(Handle<Object> object,
                                     Handle<Object> receiver,
                                     LookupResult* result,
@@ -965,7 +1018,7 @@ class Object : public MaybeObject {
   // < the length of the string.  Used to implement [] on strings.
   inline bool IsStringObjectWithCharacterAt(uint32_t index);
 
-#ifdef DEBUG
+#ifdef VERIFY_HEAP
   // Verify a pointer is a valid object pointer.
   static void VerifyPointer(Object* p);
 #endif
@@ -1020,9 +1073,8 @@ class Smi: public Object {
   }
   void SmiPrint(FILE* out);
   void SmiPrint(StringStream* accumulator);
-#ifdef DEBUG
-  void SmiVerify();
-#endif
+
+  DECLARE_VERIFIER(Smi)
 
   static const int kMinValue =
       (static_cast<unsigned int>(-1)) << (kSmiValueSize - 1);
@@ -1093,9 +1145,8 @@ class Failure: public MaybeObject {
   }
   void FailurePrint(FILE* out);
   void FailurePrint(StringStream* accumulator);
-#ifdef DEBUG
-  void FailureVerify();
-#endif
+
+  DECLARE_VERIFIER(Failure)
 
  private:
   inline intptr_t value() const;
@@ -1226,9 +1277,8 @@ class HeapObject: public Object {
   void HeapObjectPrint(FILE* out);
   void PrintHeader(FILE* out, const char* id);
 #endif
-
-#ifdef DEBUG
-  void HeapObjectVerify();
+  DECLARE_VERIFIER(HeapObject)
+#ifdef VERIFY_HEAP
   inline void VerifyObjectField(int offset);
   inline void VerifySmiField(int offset);
 
@@ -1314,9 +1364,7 @@ class HeapNumber: public HeapObject {
   }
   void HeapNumberPrint(FILE* out);
   void HeapNumberPrint(StringStream* accumulator);
-#ifdef DEBUG
-  void HeapNumberVerify();
-#endif
+  DECLARE_VERIFIER(HeapNumber)
 
   inline int get_exponent();
   inline int get_sign();
@@ -1445,10 +1493,14 @@ class JSReceiver: public HeapObject {
                                                       String* name);
   PropertyAttributes GetLocalPropertyAttribute(String* name);
 
+  inline PropertyAttributes GetElementAttribute(uint32_t index);
+  inline PropertyAttributes GetLocalElementAttribute(uint32_t index);
+
   // Can cause a GC.
   inline bool HasProperty(String* name);
   inline bool HasLocalProperty(String* name);
   inline bool HasElement(uint32_t index);
+  inline bool HasLocalElement(uint32_t index);
 
   // Return the object's prototype (might be Heap::null_value()).
   inline Object* GetPrototype();
@@ -1466,17 +1518,18 @@ class JSReceiver: public HeapObject {
 
   // Lookup a property.  If found, the result is valid and has
   // detailed information.
-  void LocalLookup(String* name, LookupResult* result);
+  void LocalLookup(String* name, LookupResult* result,
+                   bool search_hidden_prototypes = false);
   void Lookup(String* name, LookupResult* result);
 
  protected:
   Smi* GenerateIdentityHash();
 
  private:
-  PropertyAttributes GetPropertyAttribute(JSReceiver* receiver,
-                                          LookupResult* result,
-                                          String* name,
-                                          bool continue_search);
+  PropertyAttributes GetPropertyAttributeForResult(JSReceiver* receiver,
+                                                   LookupResult* result,
+                                                   String* name,
+                                                   bool continue_search);
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(JSReceiver);
 };
@@ -1525,6 +1578,8 @@ class JSObject: public JSReceiver {
   // Returns true if an object has elements of FAST_ELEMENTS or
   // FAST_SMI_ONLY_ELEMENTS.
   inline bool HasFastSmiOrObjectElements();
+  // Returns true if an object has any of the fast elements kinds.
+  inline bool HasFastElements();
   // Returns true if an object has elements of FAST_DOUBLE_ELEMENTS
   // ElementsKind.
   inline bool HasFastDoubleElements();
@@ -1604,6 +1659,18 @@ class JSObject: public JSReceiver {
       Handle<Object> value,
       PropertyAttributes attributes);
 
+  // Try to follow an existing transition to a field with attributes NONE. The
+  // return value indicates whether the transition was successful.
+  static inline bool TryTransitionToField(Handle<JSObject> object,
+                                          Handle<String> key);
+
+  inline int LastAddedFieldIndex();
+
+  // Extend the receiver with a single fast property appeared first in the
+  // passed map. This also extends the property backing store if necessary.
+  static void AddFastPropertyUsingMap(Handle<JSObject> object, Handle<Map> map);
+  inline MUST_USE_RESULT MaybeObject* AddFastPropertyUsingMap(Map* map);
+
   // Can cause GC.
   MUST_USE_RESULT MaybeObject* SetLocalPropertyIgnoreAttributes(
       String* key,
@@ -1651,12 +1718,16 @@ class JSObject: public JSReceiver {
       LookupResult* result,
       String* name,
       bool continue_search);
+  PropertyAttributes GetElementAttributeWithReceiver(JSReceiver* receiver,
+                                                     uint32_t index,
+                                                     bool continue_search);
 
   static void DefineAccessor(Handle<JSObject> object,
                              Handle<String> name,
                              Handle<Object> getter,
                              Handle<Object> setter,
                              PropertyAttributes attributes);
+  // Can cause GC.
   MUST_USE_RESULT MaybeObject* DefineAccessor(String* name,
                                               Object* getter,
                                               Object* setter,
@@ -1732,6 +1803,7 @@ class JSObject: public JSReceiver {
 
   static Handle<Object> DeleteProperty(Handle<JSObject> obj,
                                        Handle<String> name);
+  // Can cause GC.
   MUST_USE_RESULT MaybeObject* DeleteProperty(String* name, DeleteMode mode);
 
   static Handle<Object> DeleteElement(Handle<JSObject> obj, uint32_t index);
@@ -1770,36 +1842,18 @@ class JSObject: public JSReceiver {
   // be represented as a double and not a Smi.
   bool ShouldConvertToFastDoubleElements(bool* has_smi_only_elements);
 
-  // Tells whether the index'th element is present.
-  bool HasElementWithReceiver(JSReceiver* receiver, uint32_t index);
-
   // Computes the new capacity when expanding the elements of a JSObject.
   static int NewElementsCapacity(int old_capacity) {
     // (old_capacity + 50%) + 16
     return old_capacity + (old_capacity >> 1) + 16;
   }
 
-  // Tells whether the index'th element is present and how it is stored.
-  enum LocalElementType {
-    // There is no element with given index.
-    UNDEFINED_ELEMENT,
-
-    // Element with given index is handled by interceptor.
-    INTERCEPTED_ELEMENT,
+  PropertyType GetLocalPropertyType(String* name);
+  PropertyType GetLocalElementType(uint32_t index);
 
-    // Element with given index is character in string.
-    STRING_CHARACTER_ELEMENT,
-
-    // Element with given index is stored in fast backing store.
-    FAST_ELEMENT,
-
-    // Element with given index is stored in slow backing store.
-    DICTIONARY_ELEMENT
-  };
-
-  LocalElementType HasLocalElement(uint32_t index);
-
-  bool HasElementWithInterceptor(JSReceiver* receiver, uint32_t index);
+  // These methods do not perform access checks!
+  AccessorPair* GetLocalPropertyAccessorPair(String* name);
+  AccessorPair* GetLocalElementAccessorPair(uint32_t index);
 
   MUST_USE_RESULT MaybeObject* SetFastElement(uint32_t index,
                                               Object* value,
@@ -1826,7 +1880,7 @@ class JSObject: public JSReceiver {
                                       StrictModeFlag strict_mode);
 
   // Empty handle is returned if the element cannot be set to the given value.
-  static MUST_USE_RESULT Handle<Object> SetElement(
+  static Handle<Object> SetElement(
       Handle<JSObject> object,
       uint32_t index,
       Handle<Object> value,
@@ -1979,7 +2033,7 @@ class JSObject: public JSReceiver {
                                                Object* value,
                                                PropertyAttributes attributes);
 
-  // Add a property to an object.
+  // Add a property to an object. May cause GC.
   MUST_USE_RESULT MaybeObject* AddProperty(
       String* name,
       Object* value,
@@ -2061,9 +2115,7 @@ class JSObject: public JSReceiver {
   }
   void JSObjectPrint(FILE* out);
 #endif
-#ifdef DEBUG
-  void JSObjectVerify();
-#endif
+  DECLARE_VERIFIER(JSObject)
 #ifdef OBJECT_PRINT
   inline void PrintProperties() {
     PrintProperties(stdout);
@@ -2152,6 +2204,15 @@ class JSObject: public JSReceiver {
     static inline int SizeOf(Map* map, HeapObject* object);
   };
 
+  // Enqueue change record for Object.observe. May cause GC.
+  static void EnqueueChangeRecord(Handle<JSObject> object,
+                                  const char* type,
+                                  Handle<String> name,
+                                  Handle<Object> old_value);
+
+  // Deliver change records to observers. May cause GC.
+  static void DeliverChangeRecords(Isolate* isolate);
+
  private:
   friend class DictionaryElementsAccessor;
 
@@ -2159,6 +2220,14 @@ class JSObject: public JSReceiver {
                                                       Object* structure,
                                                       uint32_t index,
                                                       Object* holder);
+  MUST_USE_RESULT PropertyAttributes GetElementAttributeWithInterceptor(
+      JSReceiver* receiver,
+      uint32_t index,
+      bool continue_search);
+  MUST_USE_RESULT PropertyAttributes GetElementAttributeWithoutInterceptor(
+      JSReceiver* receiver,
+      uint32_t index,
+      bool continue_search);
   MUST_USE_RESULT MaybeObject* SetElementWithCallback(
       Object* structure,
       uint32_t index,
@@ -2303,12 +2372,12 @@ class FixedArray: public FixedArrayBase {
   inline void set_unchecked(Heap* heap, int index, Object* value,
                             WriteBarrierMode mode);
 
-  // Gives access to raw memory which stores the array's data.
-  inline Object** data_start();
-
   inline Object** GetFirstElementAddress();
   inline bool ContainsOnlySmisOrHoles();
 
+  // Gives access to raw memory which stores the array's data.
+  inline Object** data_start();
+
   // Copy operations.
   MUST_USE_RESULT inline MaybeObject* Copy();
   MUST_USE_RESULT MaybeObject* CopySize(int new_length);
@@ -2345,8 +2414,8 @@ class FixedArray: public FixedArrayBase {
   }
   void FixedArrayPrint(FILE* out);
 #endif
+  DECLARE_VERIFIER(FixedArray)
 #ifdef DEBUG
-  void FixedArrayVerify();
   // Checks if two FixedArrays have identical contents.
   bool IsEqualTo(FixedArray* other);
 #endif
@@ -2368,23 +2437,6 @@ class FixedArray: public FixedArrayBase {
     }
   };
 
-  // WhitenessWitness is used to prove that a descriptor array is white
-  // (unmarked), so incremental write barriers can be skipped because the
-  // marking invariant cannot be broken and slots pointing into evacuation
-  // candidates will be discovered when the object is scanned. A witness is
-  // always stack-allocated right after creating an array. By allocating a
-  // witness, incremental marking is globally disabled. The witness is then
-  // passed along wherever needed to statically prove that the array is known to
-  // be white.
-  class WhitenessWitness {
-   public:
-    inline explicit WhitenessWitness(FixedArray* array);
-    inline ~WhitenessWitness();
-
-   private:
-    IncrementalMarking* marking_;
-  };
-
  protected:
   // Set operation on FixedArray without using write barriers. Can
   // only be used for storing old space objects or smis.
@@ -2400,6 +2452,8 @@ class FixedArray: public FixedArrayBase {
                                                   Object* value);
 
  private:
+  STATIC_CHECK(kHeaderSize == Internals::kFixedArrayHeaderSize);
+
   DISALLOW_IMPLICIT_CONSTRUCTORS(FixedArray);
 };
 
@@ -2425,6 +2479,9 @@ class FixedDoubleArray: public FixedArrayBase {
     return kHeaderSize + length * kDoubleSize;
   }
 
+  // Gives access to raw memory which stores the array's data.
+  inline double* data_start();
+
   // Code Generation support.
   static int OffsetOfElementAt(int index) { return SizeFor(index); }
 
@@ -2449,10 +2506,7 @@ class FixedDoubleArray: public FixedArrayBase {
   }
   void FixedDoubleArrayPrint(FILE* out);
 #endif
-
-#ifdef DEBUG
-  void FixedDoubleArrayVerify();
-#endif
+  DECLARE_VERIFIER(FixedDoubleArray)
 
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(FixedDoubleArray);
@@ -2461,13 +2515,31 @@ class FixedDoubleArray: public FixedArrayBase {
 
 // DescriptorArrays are fixed arrays used to hold instance descriptors.
 // The format of the these objects is:
-//   [0]: Either Smi(0) if uninitialized, or a pointer to small fixed array:
+//   [0]: Number of descriptors
+//   [1]: Either Smi(0) if uninitialized, or a pointer to small fixed array:
 //          [0]: pointer to fixed array with enum cache
 //          [1]: either Smi(0) or pointer to fixed array with indices
-//   [1]: first key
-//   [length() - kDescriptorSize]: last key
+//   [2]: first key
+//   [2 + number of descriptors * kDescriptorSize]: start of slack
 class DescriptorArray: public FixedArray {
  public:
+  // WhitenessWitness is used to prove that a descriptor array is white
+  // (unmarked), so incremental write barriers can be skipped because the
+  // marking invariant cannot be broken and slots pointing into evacuation
+  // candidates will be discovered when the object is scanned. A witness is
+  // always stack-allocated right after creating an array. By allocating a
+  // witness, incremental marking is globally disabled. The witness is then
+  // passed along wherever needed to statically prove that the array is known to
+  // be white.
+  class WhitenessWitness {
+   public:
+    inline explicit WhitenessWitness(FixedArray* array);
+    inline ~WhitenessWitness();
+
+   private:
+    IncrementalMarking* marking_;
+  };
+
   // Returns true for both shared empty_descriptor_array and for smis, which the
   // map uses to encode additional bit fields when the descriptor array is not
   // yet used.
@@ -2477,20 +2549,47 @@ class DescriptorArray: public FixedArray {
   int number_of_descriptors() {
     ASSERT(length() >= kFirstIndex || IsEmpty());
     int len = length();
-    return len <= kFirstIndex ? 0 : (len - kFirstIndex) / kDescriptorSize;
+    return len == 0 ? 0 : Smi::cast(get(kDescriptorLengthIndex))->value();
+  }
+
+  int number_of_descriptors_storage() {
+    int len = length();
+    return len == 0 ? 0 : (len - kFirstIndex) / kDescriptorSize;
+  }
+
+  int NumberOfSlackDescriptors() {
+    return number_of_descriptors_storage() - number_of_descriptors();
   }
 
+  inline void SetNumberOfDescriptors(int number_of_descriptors);
   inline int number_of_entries() { return number_of_descriptors(); }
-  inline int NextEnumerationIndex() { return number_of_descriptors() + 1; }
 
   bool HasEnumCache() {
     return !IsEmpty() && !get(kEnumCacheIndex)->IsSmi();
   }
 
-  Object* GetEnumCache() {
+  void CopyEnumCacheFrom(DescriptorArray* array) {
+    set(kEnumCacheIndex, array->get(kEnumCacheIndex));
+  }
+
+  FixedArray* GetEnumCache() {
     ASSERT(HasEnumCache());
     FixedArray* bridge = FixedArray::cast(get(kEnumCacheIndex));
-    return bridge->get(kEnumCacheBridgeCacheIndex);
+    return FixedArray::cast(bridge->get(kEnumCacheBridgeCacheIndex));
+  }
+
+  bool HasEnumIndicesCache() {
+    if (IsEmpty()) return false;
+    Object* object = get(kEnumCacheIndex);
+    if (object->IsSmi()) return false;
+    FixedArray* bridge = FixedArray::cast(object);
+    return !bridge->get(kEnumCacheBridgeIndicesCacheIndex)->IsSmi();
+  }
+
+  FixedArray* GetEnumIndicesCache() {
+    ASSERT(HasEnumIndicesCache());
+    FixedArray* bridge = FixedArray::cast(get(kEnumCacheIndex));
+    return FixedArray::cast(bridge->get(kEnumCacheBridgeIndicesCacheIndex));
   }
 
   Object** GetEnumCacheSlot() {
@@ -2499,6 +2598,8 @@ class DescriptorArray: public FixedArray {
                                 kEnumCacheOffset);
   }
 
+  void ClearEnumCache();
+
   // Initialize or change the enum cache,
   // using the supplied storage for the small "bridge".
   void SetEnumCache(FixedArray* bridge_storage,
@@ -2526,13 +2627,13 @@ class DescriptorArray: public FixedArray {
   inline void Set(int descriptor_number,
                   Descriptor* desc,
                   const WhitenessWitness&);
+  inline void Set(int descriptor_number, Descriptor* desc);
 
   // Append automatically sets the enumeration index. This should only be used
   // to add descriptors in bulk at the end, followed by sorting the descriptor
   // array.
-  inline void Append(Descriptor* desc,
-                     const WhitenessWitness&,
-                     int number_of_set_descriptors);
+  inline void Append(Descriptor* desc, const WhitenessWitness&);
+  inline void Append(Descriptor* desc);
 
   // Transfer a complete descriptor from the src descriptor array to this
   // descriptor array.
@@ -2541,23 +2642,22 @@ class DescriptorArray: public FixedArray {
                 int src_index,
                 const WhitenessWitness&);
 
+  MUST_USE_RESULT MaybeObject* CopyUpTo(int enumeration_index);
+
   // Sort the instance descriptors by the hash codes of their keys.
   void Sort();
-  inline void SwapSortedKeys(int first, int second);
 
   // Search the instance descriptors for given name.
-  INLINE(int Search(String* name));
+  INLINE(int Search(String* name, int number_of_own_descriptors));
 
   // As the above, but uses DescriptorLookupCache and updates it when
   // necessary.
-  INLINE(int SearchWithCache(String* name));
-
-  // Tells whether the name is present int the array.
-  bool Contains(String* name) { return kNotFound != Search(name); }
+  INLINE(int SearchWithCache(String* name, Map* map));
 
   // Allocates a DescriptorArray, but returns the singleton
   // empty descriptor array object if number_of_descriptors is 0.
-  MUST_USE_RESULT static MaybeObject* Allocate(int number_of_descriptors);
+  MUST_USE_RESULT static MaybeObject* Allocate(int number_of_descriptors,
+                                               int slack = 0);
 
   // Casting.
   static inline DescriptorArray* cast(Object* obj);
@@ -2565,8 +2665,9 @@ class DescriptorArray: public FixedArray {
   // Constant for denoting key was not found.
   static const int kNotFound = -1;
 
-  static const int kEnumCacheIndex = 0;
-  static const int kFirstIndex = 1;
+  static const int kDescriptorLengthIndex = 0;
+  static const int kEnumCacheIndex = 1;
+  static const int kFirstIndex = 2;
 
   // The length of the "bridge" to the enum cache.
   static const int kEnumCacheBridgeLength = 2;
@@ -2574,7 +2675,8 @@ class DescriptorArray: public FixedArray {
   static const int kEnumCacheBridgeIndicesCacheIndex = 1;
 
   // Layout description.
-  static const int kEnumCacheOffset = FixedArray::kHeaderSize;
+  static const int kDescriptorLengthOffset = FixedArray::kHeaderSize;
+  static const int kEnumCacheOffset = kDescriptorLengthOffset + kPointerSize;
   static const int kFirstOffset = kEnumCacheOffset + kPointerSize;
 
   // Layout description for the bridge array.
@@ -2596,7 +2698,7 @@ class DescriptorArray: public FixedArray {
 
 #ifdef DEBUG
   // Is the descriptor array sorted and without duplicates?
-  bool IsSortedNoDuplicates();
+  bool IsSortedNoDuplicates(int valid_descriptors = -1);
 
   // Is the descriptor array consistent with the back pointers in targets?
   bool IsConsistentWithBackPointers(Map* current_map);
@@ -2649,24 +2751,21 @@ class DescriptorArray: public FixedArray {
            kDescriptorValue;
   }
 
-  // Swap operation on FixedArray without using write barriers.
-  static inline void NoIncrementalWriteBarrierSwap(
-      FixedArray* array, int first, int second);
-
   // Swap first and second descriptor.
-  inline void NoIncrementalWriteBarrierSwapDescriptors(
-      int first, int second);
+  inline void SwapSortedKeys(int first, int second);
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(DescriptorArray);
 };
 
 
-template<typename T>
-inline int LinearSearch(T* array, String* name, int len);
+enum SearchMode { ALL_ENTRIES, VALID_ENTRIES };
 
+template<SearchMode search_mode, typename T>
+inline int LinearSearch(T* array, String* name, int len, int valid_entries);
 
-template<typename T>
-inline int Search(T* array, String* name);
+
+template<SearchMode search_mode, typename T>
+inline int Search(T* array, String* name, int valid_entries = 0);
 
 
 // HashTable is a subclass of FixedArray that implements a hash table
@@ -2868,11 +2967,12 @@ class HashTable: public FixedArray {
     return (hash + GetProbeOffset(number)) & (size - 1);
   }
 
-  static uint32_t FirstProbe(uint32_t hash, uint32_t size) {
+  inline static uint32_t FirstProbe(uint32_t hash, uint32_t size) {
     return hash & (size - 1);
   }
 
-  static uint32_t NextProbe(uint32_t last, uint32_t number, uint32_t size) {
+  inline static uint32_t NextProbe(
+      uint32_t last, uint32_t number, uint32_t size) {
     return (last + number) & (size - 1);
   }
 
@@ -2923,7 +3023,7 @@ class SymbolTableShape : public BaseShape<HashTableKey*> {
   static const int kEntrySize = 1;
 };
 
-class SeqAsciiString;
+class SeqOneByteString;
 
 // SymbolTable.
 //
@@ -2939,7 +3039,7 @@ class SymbolTable: public HashTable<SymbolTableShape, HashTableKey*> {
   MUST_USE_RESULT MaybeObject* LookupAsciiSymbol(Vector<const char> str,
                                                  Object** s);
   MUST_USE_RESULT MaybeObject* LookupSubStringAsciiSymbol(
-      Handle<SeqAsciiString> str,
+      Handle<SeqOneByteString> str,
       int from,
       int length,
       Object** s);
@@ -2959,6 +3059,8 @@ class SymbolTable: public HashTable<SymbolTableShape, HashTableKey*> {
  private:
   MUST_USE_RESULT MaybeObject* LookupKey(HashTableKey* key, Object** s);
 
+  template <bool seq_ascii> friend class JsonParser;
+
   DISALLOW_IMPLICIT_CONSTRUCTORS(SymbolTable);
 };
 
@@ -3340,9 +3442,7 @@ class JSFunctionResultCache: public FixedArray {
   // Casting
   static inline JSFunctionResultCache* cast(Object* obj);
 
-#ifdef DEBUG
-  void JSFunctionResultCacheVerify();
-#endif
+  DECLARE_VERIFIER(JSFunctionResultCache)
 };
 
 
@@ -3562,9 +3662,7 @@ class NormalizedMapCache: public FixedArray {
   // Casting
   static inline NormalizedMapCache* cast(Object* obj);
 
-#ifdef DEBUG
-  void NormalizedMapCacheVerify();
-#endif
+  DECLARE_VERIFIER(NormalizedMapCache)
 };
 
 
@@ -3613,9 +3711,7 @@ class ByteArray: public FixedArrayBase {
   }
   void ByteArrayPrint(FILE* out);
 #endif
-#ifdef DEBUG
-  void ByteArrayVerify();
-#endif
+  DECLARE_VERIFIER(ByteArray)
 
   // Layout description.
   static const int kAlignedSize = OBJECT_POINTER_ALIGN(kHeaderSize);
@@ -3649,9 +3745,7 @@ class FreeSpace: public HeapObject {
   }
   void FreeSpacePrint(FILE* out);
 #endif
-#ifdef DEBUG
-  void FreeSpaceVerify();
-#endif
+  DECLARE_VERIFIER(FreeSpace)
 
   // Layout description.
   // Size is smi tagged when it is stored.
@@ -3731,9 +3825,7 @@ class ExternalPixelArray: public ExternalArray {
   }
   void ExternalPixelArrayPrint(FILE* out);
 #endif
-#ifdef DEBUG
-  void ExternalPixelArrayVerify();
-#endif  // DEBUG
+  DECLARE_VERIFIER(ExternalPixelArray)
 
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(ExternalPixelArray);
@@ -3760,9 +3852,7 @@ class ExternalByteArray: public ExternalArray {
   }
   void ExternalByteArrayPrint(FILE* out);
 #endif
-#ifdef DEBUG
-  void ExternalByteArrayVerify();
-#endif  // DEBUG
+  DECLARE_VERIFIER(ExternalByteArray)
 
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(ExternalByteArray);
@@ -3789,9 +3879,7 @@ class ExternalUnsignedByteArray: public ExternalArray {
   }
   void ExternalUnsignedByteArrayPrint(FILE* out);
 #endif
-#ifdef DEBUG
-  void ExternalUnsignedByteArrayVerify();
-#endif  // DEBUG
+  DECLARE_VERIFIER(ExternalUnsignedByteArray)
 
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(ExternalUnsignedByteArray);
@@ -3818,9 +3906,7 @@ class ExternalShortArray: public ExternalArray {
   }
   void ExternalShortArrayPrint(FILE* out);
 #endif
-#ifdef DEBUG
-  void ExternalShortArrayVerify();
-#endif  // DEBUG
+  DECLARE_VERIFIER(ExternalShortArray)
 
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(ExternalShortArray);
@@ -3847,9 +3933,7 @@ class ExternalUnsignedShortArray: public ExternalArray {
   }
   void ExternalUnsignedShortArrayPrint(FILE* out);
 #endif
-#ifdef DEBUG
-  void ExternalUnsignedShortArrayVerify();
-#endif  // DEBUG
+  DECLARE_VERIFIER(ExternalUnsignedShortArray)
 
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(ExternalUnsignedShortArray);
@@ -3876,9 +3960,7 @@ class ExternalIntArray: public ExternalArray {
   }
   void ExternalIntArrayPrint(FILE* out);
 #endif
-#ifdef DEBUG
-  void ExternalIntArrayVerify();
-#endif  // DEBUG
+  DECLARE_VERIFIER(ExternalIntArray)
 
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(ExternalIntArray);
@@ -3905,9 +3987,7 @@ class ExternalUnsignedIntArray: public ExternalArray {
   }
   void ExternalUnsignedIntArrayPrint(FILE* out);
 #endif
-#ifdef DEBUG
-  void ExternalUnsignedIntArrayVerify();
-#endif  // DEBUG
+  DECLARE_VERIFIER(ExternalUnsignedIntArray)
 
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(ExternalUnsignedIntArray);
@@ -3934,9 +4014,7 @@ class ExternalFloatArray: public ExternalArray {
   }
   void ExternalFloatArrayPrint(FILE* out);
 #endif
-#ifdef DEBUG
-  void ExternalFloatArrayVerify();
-#endif  // DEBUG
+  DECLARE_VERIFIER(ExternalFloatArray)
 
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(ExternalFloatArray);
@@ -3963,9 +4041,7 @@ class ExternalDoubleArray: public ExternalArray {
   }
   void ExternalDoubleArrayPrint(FILE* out);
 #endif  // OBJECT_PRINT
-#ifdef DEBUG
-  void ExternalDoubleArrayVerify();
-#endif  // DEBUG
+  DECLARE_VERIFIER(ExternalDoubleArray)
 
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(ExternalDoubleArray);
@@ -4233,8 +4309,12 @@ class Code: public HeapObject {
   DECL_ACCESSORS(deoptimization_data, FixedArray)
 
   // [type_feedback_info]: Struct containing type feedback information.
-  // Will contain either a TypeFeedbackInfo object, or undefined.
+  // STUBs can use this slot to store arbitrary information as a Smi.
+  // Will contain either a TypeFeedbackInfo object, or undefined, or a Smi.
   DECL_ACCESSORS(type_feedback_info, Object)
+  inline void InitializeTypeFeedbackInfoNoWriteBarrier(Object* value);
+  inline int stub_info();
+  inline void set_stub_info(int info);
 
   // [gc_metadata]: Field used to hold GC related metadata. The contents of this
   // field does not have to be traced during garbage collection since
@@ -4246,6 +4326,11 @@ class Code: public HeapObject {
   inline void set_ic_age(int count);
   inline int ic_age();
 
+  // [prologue_offset]: Offset of the function prologue, used for aging
+  // FUNCTIONs and OPTIMIZED_FUNCTIONs.
+  inline int prologue_offset();
+  inline void set_prologue_offset(int offset);
+
   // Unchecked accessors to be used during GC.
   inline ByteArray* unchecked_relocation_info();
   inline FixedArray* unchecked_deoptimization_data();
@@ -4340,21 +4425,6 @@ class Code: public HeapObject {
   inline byte unary_op_type();
   inline void set_unary_op_type(byte value);
 
-  // [type-recording binary op type]: For kind BINARY_OP_IC.
-  inline byte binary_op_type();
-  inline void set_binary_op_type(byte value);
-  inline byte binary_op_result_type();
-  inline void set_binary_op_result_type(byte value);
-
-  // [compare state]: For kind COMPARE_IC, tells what state the stub is in.
-  inline byte compare_state();
-  inline void set_compare_state(byte value);
-
-  // [compare_operation]: For kind COMPARE_IC tells what compare operation the
-  // stub was generated for.
-  inline byte compare_operation();
-  inline void set_compare_operation(byte value);
-
   // [to_boolean_foo]: For kind TO_BOOLEAN_IC tells what state the stub is in.
   inline byte to_boolean_state();
   inline void set_to_boolean_state(byte value);
@@ -4488,12 +4558,27 @@ class Code: public HeapObject {
   }
   void CodePrint(FILE* out);
 #endif
-#ifdef DEBUG
-  void CodeVerify();
-#endif
+  DECLARE_VERIFIER(Code)
+
   void ClearInlineCaches();
   void ClearTypeFeedbackCells(Heap* heap);
 
+#define DECLARE_CODE_AGE_ENUM(X) k##X##CodeAge,
+  enum Age {
+    kNoAge = 0,
+    CODE_AGE_LIST(DECLARE_CODE_AGE_ENUM)
+    kAfterLastCodeAge,
+    kLastCodeAge = kAfterLastCodeAge - 1,
+    kCodeAgeCount = kAfterLastCodeAge - 1
+  };
+#undef DECLARE_CODE_AGE_ENUM
+
+  // Code aging
+  static void MakeCodeAgeSequenceYoung(byte* sequence);
+  void MakeOlder(MarkingParity);
+  static bool IsYoungSequence(byte* sequence);
+  bool IsOld();
+
   // Max loop nesting marker used to postpose OSR. We don't take loop
   // nesting that is deeper than 5 levels into account.
   static const int kMaxLoopNestingMarker = 6;
@@ -4513,8 +4598,10 @@ class Code: public HeapObject {
   static const int kKindSpecificFlags1Offset = kFlagsOffset + kIntSize;
   static const int kKindSpecificFlags2Offset =
       kKindSpecificFlags1Offset + kIntSize;
+  // Note: We might be able to squeeze this into the flags above.
+  static const int kPrologueOffset = kKindSpecificFlags2Offset + kIntSize;
 
-  static const int kHeaderPaddingStart = kKindSpecificFlags2Offset + kIntSize;
+  static const int kHeaderPaddingStart = kPrologueOffset + kIntSize;
 
   // Add padding to align the instruction start following right after
   // the Code object header.
@@ -4548,18 +4635,6 @@ class Code: public HeapObject {
   static const int kUnaryOpTypeFirstBit =
       kStackSlotsFirstBit + kStackSlotsBitCount;
   static const int kUnaryOpTypeBitCount = 3;
-  static const int kBinaryOpTypeFirstBit =
-      kStackSlotsFirstBit + kStackSlotsBitCount;
-  static const int kBinaryOpTypeBitCount = 3;
-  static const int kBinaryOpResultTypeFirstBit =
-      kBinaryOpTypeFirstBit + kBinaryOpTypeBitCount;
-  static const int kBinaryOpResultTypeBitCount = 3;
-  static const int kCompareStateFirstBit =
-      kStackSlotsFirstBit + kStackSlotsBitCount;
-  static const int kCompareStateBitCount = 3;
-  static const int kCompareOperationFirstBit =
-      kCompareStateFirstBit + kCompareStateBitCount;
-  static const int kCompareOperationBitCount = 4;
   static const int kToBooleanStateFirstBit =
       kStackSlotsFirstBit + kStackSlotsBitCount;
   static const int kToBooleanStateBitCount = 8;
@@ -4569,11 +4644,6 @@ class Code: public HeapObject {
 
   STATIC_ASSERT(kStackSlotsFirstBit + kStackSlotsBitCount <= 32);
   STATIC_ASSERT(kUnaryOpTypeFirstBit + kUnaryOpTypeBitCount <= 32);
-  STATIC_ASSERT(kBinaryOpTypeFirstBit + kBinaryOpTypeBitCount <= 32);
-  STATIC_ASSERT(kBinaryOpResultTypeFirstBit +
-                kBinaryOpResultTypeBitCount <= 32);
-  STATIC_ASSERT(kCompareStateFirstBit + kCompareStateBitCount <= 32);
-  STATIC_ASSERT(kCompareOperationFirstBit + kCompareOperationBitCount <= 32);
   STATIC_ASSERT(kToBooleanStateFirstBit + kToBooleanStateBitCount <= 32);
   STATIC_ASSERT(kHasFunctionCacheFirstBit + kHasFunctionCacheBitCount <= 32);
 
@@ -4581,14 +4651,6 @@ class Code: public HeapObject {
       kStackSlotsFirstBit, kStackSlotsBitCount> {};  // NOLINT
   class UnaryOpTypeField: public BitField<int,
       kUnaryOpTypeFirstBit, kUnaryOpTypeBitCount> {};  // NOLINT
-  class BinaryOpTypeField: public BitField<int,
-      kBinaryOpTypeFirstBit, kBinaryOpTypeBitCount> {};  // NOLINT
-  class BinaryOpResultTypeField: public BitField<int,
-      kBinaryOpResultTypeFirstBit, kBinaryOpResultTypeBitCount> {};  // NOLINT
-  class CompareStateField: public BitField<int,
-      kCompareStateFirstBit, kCompareStateBitCount> {};  // NOLINT
-  class CompareOperationField: public BitField<int,
-      kCompareOperationFirstBit, kCompareOperationBitCount> {};  // NOLINT
   class ToBooleanStateField: public BitField<int,
       kToBooleanStateFirstBit, kToBooleanStateBitCount> {};  // NOLINT
   class HasFunctionCacheField: public BitField<bool,
@@ -4622,6 +4684,20 @@ class Code: public HeapObject {
       TypeField::kMask | CacheHolderField::kMask;
 
  private:
+  friend class RelocIterator;
+
+  // Code aging
+  byte* FindCodeAgeSequence();
+  static void  GetCodeAgeAndParity(Code* code, Age* age,
+                                   MarkingParity* parity);
+  static void GetCodeAgeAndParity(byte* sequence, Age* age,
+                                  MarkingParity* parity);
+  static Code* GetCodeAgeStub(Age age, MarkingParity parity);
+
+  // Code aging -- platform-specific
+  static void PatchPlatformCodeAge(byte* sequence, Age age,
+                                   MarkingParity parity);
+
   DISALLOW_IMPLICIT_CONSTRUCTORS(Code);
 };
 
@@ -4672,6 +4748,8 @@ class Map: public HeapObject {
   class IsShared:                   public BitField<bool, 22,  1> {};
   class FunctionWithPrototype:      public BitField<bool, 23,  1> {};
   class DictionaryMap:              public BitField<bool, 24,  1> {};
+  class OwnsDescriptors:            public BitField<bool, 25,  1> {};
+  class IsObserved:                 public BitField<bool, 26,  1> {};
 
   // Tells whether the object in the prototype property will be used
   // for instances created from this function.  If the prototype
@@ -4797,8 +4875,11 @@ class Map: public HeapObject {
   inline Map* elements_transition_map();
   MUST_USE_RESULT inline MaybeObject* set_elements_transition_map(
       Map* transitioned_map);
-  inline void SetTransition(int index, Map* target);
-  MUST_USE_RESULT inline MaybeObject* AddTransition(String* key, Map* target);
+  inline void SetTransition(int transition_index, Map* target);
+  inline Map* GetTransition(int transition_index);
+  MUST_USE_RESULT inline MaybeObject* AddTransition(String* key,
+                                                    Map* target,
+                                                    SimpleTransitionFlag flag);
   DECL_ACCESSORS(transitions, TransitionArray)
   inline void ClearTransitions(Heap* heap,
                                WriteBarrierMode mode = UPDATE_WRITE_BARRIER);
@@ -4836,14 +4917,8 @@ class Map: public HeapObject {
   inline JSFunction* unchecked_constructor();
 
   // [instance descriptors]: describes the object.
-  inline DescriptorArray* instance_descriptors();
-  MUST_USE_RESULT inline MaybeObject* SetDescriptors(
-      DescriptorArray* descriptors,
-      WriteBarrierMode mode = UPDATE_WRITE_BARRIER);
-  static void SetDescriptors(Handle<Map> map,
-                             Handle<DescriptorArray> descriptors);
-  MUST_USE_RESULT inline MaybeObject* InitializeDescriptors(
-      DescriptorArray* descriptors);
+  DECL_ACCESSORS(instance_descriptors, DescriptorArray)
+  inline void InitializeDescriptors(DescriptorArray* descriptors);
 
   // [stub cache]: contains stubs compiled for this map.
   DECL_ACCESSORS(code_cache, Object)
@@ -4920,31 +4995,50 @@ class Map: public HeapObject {
   }
 
   void SetNumberOfOwnDescriptors(int number) {
+    ASSERT(number <= instance_descriptors()->number_of_descriptors());
     set_bit_field3(NumberOfOwnDescriptorsBits::update(bit_field3(), number));
   }
 
+  inline JSGlobalPropertyCell* RetrieveDescriptorsPointer();
+
   int EnumLength() {
     return EnumLengthBits::decode(bit_field3());
   }
 
-  void SetEnumLength(int index) {
-    set_bit_field3(EnumLengthBits::update(bit_field3(), index));
+  void SetEnumLength(int length) {
+    if (length != kInvalidEnumCache) {
+      ASSERT(length >= 0);
+      ASSERT(length == 0 || instance_descriptors()->HasEnumCache());
+      ASSERT(length <= NumberOfOwnDescriptors());
+    }
+    set_bit_field3(EnumLengthBits::update(bit_field3(), length));
   }
 
+
+  inline bool owns_descriptors();
+  inline void set_owns_descriptors(bool is_shared);
+  inline bool is_observed();
+  inline void set_is_observed(bool is_observed);
+
   MUST_USE_RESULT MaybeObject* RawCopy(int instance_size);
   MUST_USE_RESULT MaybeObject* CopyWithPreallocatedFieldDescriptors();
   MUST_USE_RESULT MaybeObject* CopyDropDescriptors();
   MUST_USE_RESULT MaybeObject* CopyReplaceDescriptors(
       DescriptorArray* descriptors,
       String* name,
-      TransitionFlag flag);
+      TransitionFlag flag,
+      int descriptor_index);
+  MUST_USE_RESULT MaybeObject* ShareDescriptor(DescriptorArray* descriptors,
+                                               Descriptor* descriptor);
   MUST_USE_RESULT MaybeObject* CopyAddDescriptor(Descriptor* descriptor,
                                                  TransitionFlag flag);
   MUST_USE_RESULT MaybeObject* CopyInsertDescriptor(Descriptor* descriptor,
                                                     TransitionFlag flag);
-  MUST_USE_RESULT MaybeObject* CopyReplaceDescriptor(Descriptor* descriptor,
-                                                     int index,
-                                                     TransitionFlag flag);
+  MUST_USE_RESULT MaybeObject* CopyReplaceDescriptor(
+      DescriptorArray* descriptors,
+      Descriptor* descriptor,
+      int index,
+      TransitionFlag flag);
   MUST_USE_RESULT MaybeObject* CopyAsElementsKind(ElementsKind kind,
                                                   TransitionFlag flag);
 
@@ -4966,7 +5060,8 @@ class Map: public HeapObject {
 
   // Returns the number of properties described in instance_descriptors
   // filtering out properties with the specified attributes.
-  int NumberOfDescribedProperties(PropertyAttributes filter = NONE);
+  int NumberOfDescribedProperties(DescriptorFlag which = OWN_DESCRIPTORS,
+                                  PropertyAttributes filter = NONE);
 
   // Casting.
   static inline Map* cast(Object* obj);
@@ -4987,8 +5082,10 @@ class Map: public HeapObject {
 
   // Extend the descriptor array of the map with the list of descriptors.
   // In case of duplicates, the latest descriptor is used.
-  static void CopyAppendCallbackDescriptors(Handle<Map> map,
-                                            Handle<Object> descriptors);
+  static void AppendCallbackDescriptors(Handle<Map> map,
+                                        Handle<Object> descriptors);
+
+  static void EnsureDescriptorSlack(Handle<Map> map, int slack);
 
   // Returns the found code or undefined if absent.
   Object* FindInCodeCache(String* name, Code::Flags flags);
@@ -5026,14 +5123,14 @@ class Map: public HeapObject {
   Handle<Map> FindTransitionedMap(MapHandleList* candidates);
   Map* FindTransitionedMap(MapList* candidates);
 
-  // Zaps the contents of backing data structures in debug mode. Note that the
+  // Zaps the contents of backing data structures. Note that the
   // heap verifier (i.e. VerifyMarkingVisitor) relies on zapping of objects
   // holding weak references when incremental marking is used, because it also
   // iterates over objects that are otherwise unreachable.
-#ifdef DEBUG
+  // In general we only want to call these functions in release mode when
+  // heap verification is turned on.
   void ZapPrototypeTransitions();
   void ZapTransitions();
-#endif
 
   // Dispatched behavior.
 #ifdef OBJECT_PRINT
@@ -5042,8 +5139,9 @@ class Map: public HeapObject {
   }
   void MapPrint(FILE* out);
 #endif
-#ifdef DEBUG
-  void MapVerify();
+  DECLARE_VERIFIER(Map)
+
+#ifdef VERIFY_HEAP
   void SharedMapVerify();
 #endif
 
@@ -5070,7 +5168,7 @@ class Map: public HeapObject {
 
   static const int kMaxPreAllocatedPropertyFields = 255;
 
-  // Constant for denoting that the Enum Cache field was not yet used.
+  // Constant for denoting that the enum cache is not yet initialized.
   static const int kInvalidEnumCache = EnumLengthBits::kMax;
 
   // Layout description.
@@ -5084,11 +5182,12 @@ class Map: public HeapObject {
   // indirection.
   static const int kTransitionsOrBackPointerOffset =
       kConstructorOffset + kPointerSize;
-  static const int kCodeCacheOffset =
+  static const int kDescriptorsOffset =
       kTransitionsOrBackPointerOffset + kPointerSize;
+  static const int kCodeCacheOffset =
+      kDescriptorsOffset + kPointerSize;
   static const int kBitField3Offset = kCodeCacheOffset + kPointerSize;
-  static const int kPadStart = kBitField3Offset + kPointerSize;
-  static const int kSize = MAP_POINTER_ALIGN(kPadStart);
+  static const int kSize = kBitField3Offset + kPointerSize;
 
   // Layout of pointer fields. Heap iteration code relies on them
   // being continuously allocated.
@@ -5246,9 +5345,7 @@ class Script: public Struct {
   }
   void ScriptPrint(FILE* out);
 #endif
-#ifdef DEBUG
-  void ScriptVerify();
-#endif
+  DECLARE_VERIFIER(Script)
 
   static const int kSourceOffset = HeapObject::kHeaderSize;
   static const int kNameOffset = kSourceOffset + kPointerSize;
@@ -5728,9 +5825,7 @@ class SharedFunctionInfo: public HeapObject {
   }
   void SharedFunctionInfoPrint(FILE* out);
 #endif
-#ifdef DEBUG
-  void SharedFunctionInfoVerify();
-#endif
+  DECLARE_VERIFIER(SharedFunctionInfo)
 
   void ResetForNewContext(int new_ic_age);
 
@@ -5964,9 +6059,7 @@ class JSModule: public JSObject {
   }
   void JSModulePrint(FILE* out);
 #endif
-#ifdef DEBUG
-  void JSModuleVerify();
-#endif
+  DECLARE_VERIFIER(JSModule)
 
   // Layout description.
   static const int kContextOffset = JSObject::kHeaderSize;
@@ -6069,8 +6162,6 @@ class JSFunction: public JSObject {
   // The initial map for an object created by this constructor.
   inline Map* initial_map();
   inline void set_initial_map(Map* value);
-  MUST_USE_RESULT inline MaybeObject* set_initial_map_and_cache_transitions(
-      Map* value);
   inline bool has_initial_map();
 
   // Get and set the prototype property on a JSFunction. If the
@@ -6127,9 +6218,7 @@ class JSFunction: public JSObject {
   }
   void JSFunctionPrint(FILE* out);
 #endif
-#ifdef DEBUG
-  void JSFunctionVerify();
-#endif
+  DECLARE_VERIFIER(JSFunction)
 
   // Returns the number of allocated literals.
   inline int NumberOfLiterals();
@@ -6188,9 +6277,7 @@ class JSGlobalProxy : public JSObject {
   }
   void JSGlobalProxyPrint(FILE* out);
 #endif
-#ifdef DEBUG
-  void JSGlobalProxyVerify();
-#endif
+  DECLARE_VERIFIER(JSGlobalProxy)
 
   // Layout description.
   static const int kNativeContextOffset = JSObject::kHeaderSize;
@@ -6237,7 +6324,7 @@ class GlobalObject: public JSObject {
       Handle<GlobalObject> global,
       Handle<String> name);
   // TODO(kmillikin): This function can be eliminated once the stub cache is
-  // full handlified (and the static helper can be written directly).
+  // fully handlified (and the static helper can be written directly).
   MUST_USE_RESULT MaybeObject* EnsurePropertyCell(String* name);
 
   // Casting.
@@ -6268,9 +6355,7 @@ class JSGlobalObject: public GlobalObject {
   }
   void JSGlobalObjectPrint(FILE* out);
 #endif
-#ifdef DEBUG
-  void JSGlobalObjectVerify();
-#endif
+  DECLARE_VERIFIER(JSGlobalObject)
 
   // Layout description.
   static const int kSize = GlobalObject::kHeaderSize;
@@ -6302,9 +6387,7 @@ class JSBuiltinsObject: public GlobalObject {
   }
   void JSBuiltinsObjectPrint(FILE* out);
 #endif
-#ifdef DEBUG
-  void JSBuiltinsObjectVerify();
-#endif
+  DECLARE_VERIFIER(JSBuiltinsObject)
 
   // Layout description.  The size of the builtins object includes
   // room for two pointers per runtime routine written in javascript
@@ -6345,9 +6428,7 @@ class JSValue: public JSObject {
   }
   void JSValuePrint(FILE* out);
 #endif
-#ifdef DEBUG
-  void JSValueVerify();
-#endif
+  DECLARE_VERIFIER(JSValue)
 
   // Layout description.
   static const int kValueOffset = JSObject::kHeaderSize;
@@ -6401,9 +6482,8 @@ class JSDate: public JSObject {
   }
   void JSDatePrint(FILE* out);
 #endif
-#ifdef DEBUG
-  void JSDateVerify();
-#endif
+  DECLARE_VERIFIER(JSDate)
+
   // The order is important. It must be kept in sync with date macros
   // in macros.py.
   enum FieldIndex {
@@ -6499,9 +6579,7 @@ class JSMessageObject: public JSObject {
   }
   void JSMessageObjectPrint(FILE* out);
 #endif
-#ifdef DEBUG
-  void JSMessageObjectVerify();
-#endif
+  DECLARE_VERIFIER(JSMessageObject)
 
   // Layout description.
   static const int kTypeOffset = JSObject::kHeaderSize;
@@ -6570,6 +6648,7 @@ class JSRegExp: public JSObject {
   inline Object* DataAtUnchecked(int index);
   inline void SetDataAtUnchecked(int index, Object* value, Heap* heap);
   inline Type TypeTagUnchecked();
+  inline void ResetLastIndex();
 
   static int code_index(bool is_ascii) {
     if (is_ascii) {
@@ -6590,9 +6669,7 @@ class JSRegExp: public JSObject {
   static inline JSRegExp* cast(Object* obj);
 
   // Dispatched behavior.
-#ifdef DEBUG
-  void JSRegExpVerify();
-#endif
+  DECLARE_VERIFIER(JSRegExp)
 
   static const int kDataOffset = JSObject::kHeaderSize;
   static const int kSize = kDataOffset + kPointerSize;
@@ -6748,9 +6825,7 @@ class CodeCache: public Struct {
   }
   void CodeCachePrint(FILE* out);
 #endif
-#ifdef DEBUG
-  void CodeCacheVerify();
-#endif
+  DECLARE_VERIFIER(CodeCache)
 
   static const int kDefaultCacheOffset = HeapObject::kHeaderSize;
   static const int kNormalTypeCacheOffset =
@@ -6839,9 +6914,7 @@ class PolymorphicCodeCache: public Struct {
   }
   void PolymorphicCodeCachePrint(FILE* out);
 #endif
-#ifdef DEBUG
-  void PolymorphicCodeCacheVerify();
-#endif
+  DECLARE_VERIFIER(PolymorphicCodeCache)
 
   static const int kCacheOffset = HeapObject::kHeaderSize;
   static const int kSize = kCacheOffset + kPointerSize;
@@ -6894,9 +6967,7 @@ class TypeFeedbackInfo: public Struct {
   }
   void TypeFeedbackInfoPrint(FILE* out);
 #endif
-#ifdef DEBUG
-  void TypeFeedbackInfoVerify();
-#endif
+  DECLARE_VERIFIER(TypeFeedbackInfo)
 
   static const int kStorage1Offset = HeapObject::kHeaderSize;
   static const int kStorage2Offset = kStorage1Offset + kPointerSize;
@@ -6942,9 +7013,7 @@ class AliasedArgumentsEntry: public Struct {
   }
   void AliasedArgumentsEntryPrint(FILE* out);
 #endif
-#ifdef DEBUG
-  void AliasedArgumentsEntryVerify();
-#endif
+  DECLARE_VERIFIER(AliasedArgumentsEntry)
 
   static const int kAliasedContextSlot = HeapObject::kHeaderSize;
   static const int kSize = kAliasedContextSlot + kPointerSize;
@@ -6987,10 +7056,6 @@ class StringHasher {
   // index.
   bool is_array_index() { return is_array_index_; }
 
-  bool is_valid() { return is_valid_; }
-
-  void invalidate() { is_valid_ = false; }
-
   // Calculated hash value for a string consisting of 1 to
   // String::kMaxArrayIndexSize digits with no leading zeros (except "0").
   // value is represented decimal value.
@@ -7009,13 +7074,33 @@ class StringHasher {
 
   inline uint32_t GetHash();
 
+  // Reusable parts of the hashing algorithm.
+  INLINE(static uint32_t AddCharacterCore(uint32_t running_hash, uint32_t c));
+  INLINE(static uint32_t GetHashCore(uint32_t running_hash));
+
   int length_;
   uint32_t raw_running_hash_;
   uint32_t array_index_;
   bool is_array_index_;
   bool is_first_char_;
-  bool is_valid_;
   friend class TwoCharHashTableKey;
+
+  template <bool seq_ascii> friend class JsonParser;
+};
+
+
+class IncrementalAsciiStringHasher {
+ public:
+  explicit inline IncrementalAsciiStringHasher(uint32_t seed, char first_char);
+  inline void AddCharacter(uc32 c);
+  inline uint32_t GetHash();
+
+ private:
+  int length_;
+  uint32_t raw_running_hash_;
+  uint32_t array_index_;
+  bool is_array_index_;
+  char first_char_;
 };
 
 
@@ -7085,6 +7170,8 @@ class StringShape BASE_EMBEDDED {
 // All string values have a length field.
 class String: public HeapObject {
  public:
+  enum Encoding { ONE_BYTE_ENCODING, TWO_BYTE_ENCODING };
+
   // Representation of the flat content of a String.
   // A non-flat string doesn't have flat content.
   // A flat string has content that's encoded as a sequence of either
@@ -7142,13 +7229,13 @@ class String: public HeapObject {
   // be ASCII encoded.  This might be the case even if the string is
   // two-byte.  Such strings may appear when the embedder prefers
   // two-byte external representations even for ASCII data.
-  inline bool IsAsciiRepresentation();
+  inline bool IsOneByteRepresentation();
   inline bool IsTwoByteRepresentation();
 
   // Cons and slices have an encoding flag that may not represent the actual
   // encoding of the underlying string.  This is taken into account here.
   // Requires: this->IsFlat()
-  inline bool IsAsciiRepresentationUnderneath();
+  inline bool IsOneByteRepresentationUnderneath();
   inline bool IsTwoByteRepresentationUnderneath();
 
   // NOTE: this should be considered only a hint.  False negatives are
@@ -7275,9 +7362,8 @@ class String: public HeapObject {
 
   char* ToAsciiArray();
 #endif
-#ifdef DEBUG
-  void StringVerify();
-#endif
+  DECLARE_VERIFIER(String)
+
   inline bool IsFlat();
 
   // Layout description.
@@ -7346,7 +7432,7 @@ class String: public HeapObject {
       kIsNotArrayIndexMask | kHashNotComputedMask;
 
   // Value of hash field containing computed hash equal to zero.
-  static const int kZeroHash = kIsNotArrayIndexMask;
+  static const int kEmptyStringHash = kIsNotArrayIndexMask;
 
   // Maximal string length.
   static const int kMaxLength = (1 << (32 - 2)) - 1;
@@ -7381,34 +7467,57 @@ class String: public HeapObject {
                           int from,
                           int to);
 
-  static inline bool IsAscii(const char* chars, int length) {
+  // The return value may point to the first aligned word containing the
+  // first non-ascii character, rather than directly to the non-ascii character.
+  // If the return value is >= the passed length, the entire string was ASCII.
+  static inline int NonAsciiStart(const char* chars, int length) {
+    const char* start = chars;
     const char* limit = chars + length;
 #ifdef V8_HOST_CAN_READ_UNALIGNED
     ASSERT(kMaxAsciiCharCode == 0x7F);
     const uintptr_t non_ascii_mask = kUintptrAllBitsSet / 0xFF * 0x80;
     while (chars + sizeof(uintptr_t) <= limit) {
       if (*reinterpret_cast<const uintptr_t*>(chars) & non_ascii_mask) {
-        return false;
+        return static_cast<int>(chars - start);
       }
       chars += sizeof(uintptr_t);
     }
 #endif
     while (chars < limit) {
-      if (static_cast<uint8_t>(*chars) > kMaxAsciiCharCodeU) return false;
+      if (static_cast<uint8_t>(*chars) > kMaxAsciiCharCodeU) {
+        return static_cast<int>(chars - start);
+      }
       ++chars;
     }
-    return true;
+    return static_cast<int>(chars - start);
   }
 
-  static inline bool IsAscii(const uc16* chars, int length) {
+  static inline bool IsAscii(const char* chars, int length) {
+    return NonAsciiStart(chars, length) >= length;
+  }
+
+  static inline int NonAsciiStart(const uc16* chars, int length) {
     const uc16* limit = chars + length;
+    const uc16* start = chars;
     while (chars < limit) {
-      if (*chars > kMaxAsciiCharCodeU) return false;
+      if (*chars > kMaxAsciiCharCodeU) return static_cast<int>(chars - start);
       ++chars;
     }
-    return true;
+    return static_cast<int>(chars - start);
+  }
+
+  static inline bool IsAscii(const uc16* chars, int length) {
+    return NonAsciiStart(chars, length) >= length;
   }
 
+  template<class Visitor, class ConsOp>
+  static inline void Visit(String* string,
+                           unsigned offset,
+                           Visitor& visitor,
+                           ConsOp& consOp,
+                           int32_t type,
+                           unsigned length);
+
  protected:
   class ReadBlockBuffer {
    public:
@@ -7467,6 +7576,11 @@ class SeqString: public String {
   // Layout description.
   static const int kHeaderSize = String::kSize;
 
+  // Truncate the string in-place if possible and return the result.
+  // In case of new_length == 0, the empty string is returned without
+  // truncating the original string.
+  MUST_USE_RESULT String* Truncate(int new_length);
+
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(SeqString);
 };
@@ -7474,13 +7588,13 @@ class SeqString: public String {
 
 // The AsciiString class captures sequential ASCII string objects.
 // Each character in the AsciiString is an ASCII character.
-class SeqAsciiString: public SeqString {
+class SeqOneByteString: public SeqString {
  public:
   static const bool kHasAsciiEncoding = true;
 
   // Dispatched behavior.
-  inline uint16_t SeqAsciiStringGet(int index);
-  inline void SeqAsciiStringSet(int index, uint16_t value);
+  inline uint16_t SeqOneByteStringGet(int index);
+  inline void SeqOneByteStringSet(int index, uint16_t value);
 
   // Get the address of the characters in this string.
   inline Address GetCharsAddress();
@@ -7488,12 +7602,12 @@ class SeqAsciiString: public SeqString {
   inline char* GetChars();
 
   // Casting
-  static inline SeqAsciiString* cast(Object* obj);
+  static inline SeqOneByteString* cast(Object* obj);
 
   // Garbage collection support.  This method is called by the
   // garbage collector to compute the actual size of an AsciiString
   // instance.
-  inline int SeqAsciiStringSize(InstanceType instance_type);
+  inline int SeqOneByteStringSize(InstanceType instance_type);
 
   // Computes the size for an AsciiString instance of a given length.
   static int SizeFor(int length) {
@@ -7507,19 +7621,17 @@ class SeqAsciiString: public SeqString {
   static const int kMaxLength = (kMaxSize - kHeaderSize);
 
   // Support for StringInputBuffer.
-  inline void SeqAsciiStringReadBlockIntoBuffer(ReadBlockBuffer* buffer,
+  inline void SeqOneByteStringReadBlockIntoBuffer(ReadBlockBuffer* buffer,
                                                 unsigned* offset,
                                                 unsigned chars);
-  inline const unibrow::byte* SeqAsciiStringReadBlock(unsigned* remaining,
+  inline const unibrow::byte* SeqOneByteStringReadBlock(unsigned* remaining,
                                                       unsigned* offset,
                                                       unsigned chars);
 
-#ifdef DEBUG
-  void SeqAsciiStringVerify();
-#endif
+  DECLARE_VERIFIER(SeqOneByteString)
 
  private:
-  DISALLOW_IMPLICIT_CONSTRUCTORS(SeqAsciiString);
+  DISALLOW_IMPLICIT_CONSTRUCTORS(SeqOneByteString);
 };
 
 
@@ -7621,9 +7733,7 @@ class ConsString: public String {
   typedef FixedBodyDescriptor<kFirstOffset, kSecondOffset + kPointerSize, kSize>
           BodyDescriptor;
 
-#ifdef DEBUG
-  void ConsStringVerify();
-#endif
+  DECLARE_VERIFIER(ConsString)
 
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(ConsString);
@@ -7675,9 +7785,7 @@ class SlicedString: public String {
                               kOffsetOffset + kPointerSize, kSize>
           BodyDescriptor;
 
-#ifdef DEBUG
-  void SlicedStringVerify();
-#endif
+  DECLARE_VERIFIER(SlicedString)
 
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(SlicedString);
@@ -7864,14 +7972,75 @@ class StringInputBuffer: public unibrow::InputBuffer<String, String*, 1024> {
 };
 
 
-class SafeStringInputBuffer
-  : public unibrow::InputBuffer<String, String**, 256> {
+// This maintains an off-stack representation of the stack frames required
+// to traverse a ConsString, allowing an entirely iterative and restartable
+// traversal of the entire string
+// Note: this class is not GC-safe.
+class ConsStringIteratorOp {
  public:
-  virtual void Seek(unsigned pos);
-  inline SafeStringInputBuffer()
-      : unibrow::InputBuffer<String, String**, 256>() {}
-  explicit inline SafeStringInputBuffer(String** backing)
-      : unibrow::InputBuffer<String, String**, 256>(backing) {}
+  struct ContinueResponse {
+    String* string_;
+    unsigned offset_;
+    unsigned length_;
+    int32_t type_;
+  };
+  inline ConsStringIteratorOp() {}
+  String* Operate(ConsString* consString, unsigned* outerOffset,
+      int32_t* typeOut, unsigned* lengthOut);
+  inline bool ContinueOperation(ContinueResponse* response);
+  inline void Reset();
+  inline bool HasMore();
+
+ private:
+  // TODO(dcarney): Templatize this out for different stack sizes.
+  static const unsigned kStackSize = 32;
+  // Use a mask instead of doing modulo operations for stack wrapping.
+  static const unsigned kDepthMask = kStackSize-1;
+  STATIC_ASSERT(IS_POWER_OF_TWO(kStackSize));
+  static inline unsigned OffsetForDepth(unsigned depth);
+  static inline uint32_t MaskForDepth(unsigned depth);
+
+  inline void ClearRightDescent();
+  inline void SetRightDescent();
+  inline void PushLeft(ConsString* string);
+  inline void PushRight(ConsString* string, int32_t type);
+  inline void AdjustMaximumDepth();
+  inline void Pop();
+  inline void ResetStack();
+  String* NextLeaf(bool* blewStack, int32_t* typeOut);
+
+  unsigned depth_;
+  unsigned maximum_depth_;
+  uint32_t trace_;
+  ConsString* frames_[kStackSize];
+  unsigned consumed_;
+  ConsString* root_;
+  int32_t root_type_;
+  unsigned root_length_;
+  DISALLOW_COPY_AND_ASSIGN(ConsStringIteratorOp);
+};
+
+
+// Note: this class is not GC-safe.
+class StringCharacterStream {
+ public:
+  inline StringCharacterStream(
+      String* string, unsigned offset, ConsStringIteratorOp* op);
+  inline uint16_t GetNext();
+  inline bool HasMore();
+  inline void Reset(String* string, unsigned offset, ConsStringIteratorOp* op);
+  inline void VisitOneByteString(const uint8_t* chars, unsigned length);
+  inline void VisitTwoByteString(const uint16_t* chars, unsigned length);
+
+ private:
+  bool is_one_byte_;
+  union {
+    const uint8_t* buffer8_;
+    const uint16_t* buffer16_;
+  };
+  const uint8_t* end_;
+  ConsStringIteratorOp* op_;
+  DISALLOW_COPY_AND_ASSIGN(StringCharacterStream);
 };
 
 
@@ -7904,9 +8073,7 @@ class Oddball: public HeapObject {
   static inline Oddball* cast(Object* obj);
 
   // Dispatched behavior.
-#ifdef DEBUG
-  void OddballVerify();
-#endif
+  DECLARE_VERIFIER(Oddball)
 
   // Initialize the fields.
   MUST_USE_RESULT MaybeObject* Initialize(const char* to_string,
@@ -7957,9 +8124,8 @@ class JSGlobalPropertyCell: public HeapObject {
     return address() + kValueOffset;
   }
 
-#ifdef DEBUG
-  void JSGlobalPropertyCellVerify();
-#endif
+  DECLARE_VERIFIER(JSGlobalPropertyCell)
+
 #ifdef OBJECT_PRINT
   inline void JSGlobalPropertyCellPrint() {
     JSGlobalPropertyCellPrint(stdout);
@@ -8062,9 +8228,7 @@ class JSProxy: public JSReceiver {
   }
   void JSProxyPrint(FILE* out);
 #endif
-#ifdef DEBUG
-  void JSProxyVerify();
-#endif
+  DECLARE_VERIFIER(JSProxy)
 
   // Layout description. We add padding so that a proxy has the same
   // size as a virgin JSObject. This is essential for becoming a JSObject
@@ -8105,9 +8269,7 @@ class JSFunctionProxy: public JSProxy {
   }
   void JSFunctionProxyPrint(FILE* out);
 #endif
-#ifdef DEBUG
-  void JSFunctionProxyVerify();
-#endif
+  DECLARE_VERIFIER(JSFunctionProxy)
 
   // Layout description.
   static const int kCallTrapOffset = JSProxy::kPaddingOffset;
@@ -8142,9 +8304,7 @@ class JSSet: public JSObject {
   }
   void JSSetPrint(FILE* out);
 #endif
-#ifdef DEBUG
-  void JSSetVerify();
-#endif
+  DECLARE_VERIFIER(JSSet)
 
   static const int kTableOffset = JSObject::kHeaderSize;
   static const int kSize = kTableOffset + kPointerSize;
@@ -8169,9 +8329,7 @@ class JSMap: public JSObject {
   }
   void JSMapPrint(FILE* out);
 #endif
-#ifdef DEBUG
-  void JSMapVerify();
-#endif
+  DECLARE_VERIFIER(JSMap)
 
   static const int kTableOffset = JSObject::kHeaderSize;
   static const int kSize = kTableOffset + kPointerSize;
@@ -8199,9 +8357,7 @@ class JSWeakMap: public JSObject {
   }
   void JSWeakMapPrint(FILE* out);
 #endif
-#ifdef DEBUG
-  void JSWeakMapVerify();
-#endif
+  DECLARE_VERIFIER(JSWeakMap)
 
   static const int kTableOffset = JSObject::kHeaderSize;
   static const int kNextOffset = kTableOffset + kPointerSize;
@@ -8236,9 +8392,7 @@ class Foreign: public HeapObject {
   }
   void ForeignPrint(FILE* out);
 #endif
-#ifdef DEBUG
-  void ForeignVerify();
-#endif
+  DECLARE_VERIFIER(Foreign)
 
   // Layout description.
 
@@ -8276,6 +8430,7 @@ class JSArray: public JSObject {
 
   // Initializes the array to a certain length.
   inline bool AllowsSetElementsLength();
+  // Can cause GC.
   MUST_USE_RESULT MaybeObject* SetElementsLength(Object* length);
 
   // Set the content of the array to the content of storage.
@@ -8295,9 +8450,7 @@ class JSArray: public JSObject {
   }
   void JSArrayPrint(FILE* out);
 #endif
-#ifdef DEBUG
-  void JSArrayVerify();
-#endif
+  DECLARE_VERIFIER(JSArray)
 
   // Number of element slots to pre-allocate for an empty array.
   static const int kPreallocatedArrayElements = 4;
@@ -8376,9 +8529,7 @@ class AccessorInfo: public Struct {
   }
   void AccessorInfoPrint(FILE* out);
 #endif
-#ifdef DEBUG
-  void AccessorInfoVerify();
-#endif
+  DECLARE_VERIFIER(AccessorInfo)
 
   static const int kGetterOffset = HeapObject::kHeaderSize;
   static const int kSetterOffset = kGetterOffset + kPointerSize;
@@ -8442,9 +8593,7 @@ class AccessorPair: public Struct {
 #ifdef OBJECT_PRINT
   void AccessorPairPrint(FILE* out = stdout);
 #endif
-#ifdef DEBUG
-  void AccessorPairVerify();
-#endif
+  DECLARE_VERIFIER(AccessorPair)
 
   static const int kGetterOffset = HeapObject::kHeaderSize;
   static const int kSetterOffset = kGetterOffset + kPointerSize;
@@ -8478,9 +8627,7 @@ class AccessCheckInfo: public Struct {
   }
   void AccessCheckInfoPrint(FILE* out);
 #endif
-#ifdef DEBUG
-  void AccessCheckInfoVerify();
-#endif
+  DECLARE_VERIFIER(AccessCheckInfo)
 
   static const int kNamedCallbackOffset   = HeapObject::kHeaderSize;
   static const int kIndexedCallbackOffset = kNamedCallbackOffset + kPointerSize;
@@ -8509,9 +8656,7 @@ class InterceptorInfo: public Struct {
   }
   void InterceptorInfoPrint(FILE* out);
 #endif
-#ifdef DEBUG
-  void InterceptorInfoVerify();
-#endif
+  DECLARE_VERIFIER(InterceptorInfo)
 
   static const int kGetterOffset = HeapObject::kHeaderSize;
   static const int kSetterOffset = kGetterOffset + kPointerSize;
@@ -8539,9 +8684,7 @@ class CallHandlerInfo: public Struct {
   }
   void CallHandlerInfoPrint(FILE* out);
 #endif
-#ifdef DEBUG
-  void CallHandlerInfoVerify();
-#endif
+  DECLARE_VERIFIER(CallHandlerInfo)
 
   static const int kCallbackOffset = HeapObject::kHeaderSize;
   static const int kDataOffset = kCallbackOffset + kPointerSize;
@@ -8557,9 +8700,7 @@ class TemplateInfo: public Struct {
   DECL_ACCESSORS(tag, Object)
   DECL_ACCESSORS(property_list, Object)
 
-#ifdef DEBUG
-  void TemplateInfoVerify();
-#endif
+  DECLARE_VERIFIER(TemplateInfo)
 
   static const int kTagOffset          = HeapObject::kHeaderSize;
   static const int kPropertyListOffset = kTagOffset + kPointerSize;
@@ -8602,9 +8743,7 @@ class FunctionTemplateInfo: public TemplateInfo {
   }
   void FunctionTemplateInfoPrint(FILE* out);
 #endif
-#ifdef DEBUG
-  void FunctionTemplateInfoVerify();
-#endif
+  DECLARE_VERIFIER(FunctionTemplateInfo)
 
   static const int kSerialNumberOffset = TemplateInfo::kHeaderSize;
   static const int kCallCodeOffset = kSerialNumberOffset + kPointerSize;
@@ -8651,9 +8790,7 @@ class ObjectTemplateInfo: public TemplateInfo {
   }
   void ObjectTemplateInfoPrint(FILE* out);
 #endif
-#ifdef DEBUG
-  void ObjectTemplateInfoVerify();
-#endif
+  DECLARE_VERIFIER(ObjectTemplateInfo)
 
   static const int kConstructorOffset = TemplateInfo::kHeaderSize;
   static const int kInternalFieldCountOffset =
@@ -8675,9 +8812,7 @@ class SignatureInfo: public Struct {
   }
   void SignatureInfoPrint(FILE* out);
 #endif
-#ifdef DEBUG
-  void SignatureInfoVerify();
-#endif
+  DECLARE_VERIFIER(SignatureInfo)
 
   static const int kReceiverOffset = Struct::kHeaderSize;
   static const int kArgsOffset     = kReceiverOffset + kPointerSize;
@@ -8700,9 +8835,7 @@ class TypeSwitchInfo: public Struct {
   }
   void TypeSwitchInfoPrint(FILE* out);
 #endif
-#ifdef DEBUG
-  void TypeSwitchInfoVerify();
-#endif
+  DECLARE_VERIFIER(TypeSwitchInfo)
 
   static const int kTypesOffset = Struct::kHeaderSize;
   static const int kSize        = kTypesOffset + kPointerSize;
@@ -8752,9 +8885,7 @@ class DebugInfo: public Struct {
   }
   void DebugInfoPrint(FILE* out);
 #endif
-#ifdef DEBUG
-  void DebugInfoVerify();
-#endif
+  DECLARE_VERIFIER(DebugInfo)
 
   static const int kSharedFunctionInfoIndex = Struct::kHeaderSize;
   static const int kOriginalCodeIndex = kSharedFunctionInfoIndex + kPointerSize;
@@ -8810,9 +8941,7 @@ class BreakPointInfo: public Struct {
   }
   void BreakPointInfoPrint(FILE* out);
 #endif
-#ifdef DEBUG
-  void BreakPointInfoVerify();
-#endif
+  DECLARE_VERIFIER(BreakPointInfo)
 
   static const int kCodePositionIndex = Struct::kHeaderSize;
   static const int kSourcePositionIndex = kCodePositionIndex + kPointerSize;
@@ -8830,6 +8959,7 @@ class BreakPointInfo: public Struct {
 
 #undef DECL_BOOLEAN_ACCESSORS
 #undef DECL_ACCESSORS
+#undef DECLARE_VERIFIER
 
 #define VISITOR_SYNCHRONIZATION_TAGS_LIST(V)                            \
   V(kSymbolTable, "symbol_table", "(Symbols)")                          \
@@ -8894,6 +9024,10 @@ class ObjectVisitor BASE_EMBEDDED {
   // Visits a debug call target in the instruction stream.
   virtual void VisitDebugTarget(RelocInfo* rinfo);
 
+  // Visits the byte sequence in a function's prologue that contains information
+  // about the code's age.
+  virtual void VisitCodeAgeSequence(RelocInfo* rinfo);
+
   // Handy shorthand for visiting a single pointer.
   virtual void VisitPointer(Object** p) { VisitPointers(p, p + 1); }
 
diff --git a/deps/v8/src/optimizing-compiler-thread.cc b/deps/v8/src/optimizing-compiler-thread.cc
index 06018dd1a9..e41c352f48 100644
--- a/deps/v8/src/optimizing-compiler-thread.cc
+++ b/deps/v8/src/optimizing-compiler-thread.cc
@@ -48,6 +48,8 @@ void OptimizingCompilerThread::Run() {
 
   while (true) {
     input_queue_semaphore_->Wait();
+    Logger::TimerEventScope timer(
+        isolate_, Logger::TimerEventScope::v8_recompile_parallel);
     if (Acquire_Load(&stop_thread_)) {
       stop_semaphore_->Signal();
       if (FLAG_trace_parallel_recompilation) {
@@ -72,7 +74,13 @@ void OptimizingCompilerThread::Run() {
     USE(status);
 
     output_queue_.Enqueue(optimizing_compiler);
-    isolate_->stack_guard()->RequestCodeReadyEvent();
+    if (!FLAG_manual_parallel_recompilation) {
+      isolate_->stack_guard()->RequestCodeReadyEvent();
+    } else {
+      // In manual mode, do not trigger a code ready event.
+      // Instead, wait for the optimized functions to be installed manually.
+      output_queue_semaphore_->Signal();
+    }
 
     if (FLAG_trace_parallel_recompilation) {
       time_spent_compiling_ += OS::Ticks() - compiling_start;
@@ -99,6 +107,9 @@ void OptimizingCompilerThread::InstallOptimizedFunctions() {
   HandleScope handle_scope(isolate_);
   int functions_installed = 0;
   while (!output_queue_.IsEmpty()) {
+    if (FLAG_manual_parallel_recompilation) {
+      output_queue_semaphore_->Wait();
+    }
     OptimizingCompiler* compiler = NULL;
     output_queue_.Dequeue(&compiler);
     Compiler::InstallOptimizedCode(compiler);
@@ -110,6 +121,18 @@ void OptimizingCompilerThread::InstallOptimizedFunctions() {
 }
 
 
+Handle<SharedFunctionInfo>
+    OptimizingCompilerThread::InstallNextOptimizedFunction() {
+  ASSERT(FLAG_manual_parallel_recompilation);
+  output_queue_semaphore_->Wait();
+  OptimizingCompiler* compiler = NULL;
+  output_queue_.Dequeue(&compiler);
+  Handle<SharedFunctionInfo> shared = compiler->info()->shared_info();
+  Compiler::InstallOptimizedCode(compiler);
+  return shared;
+}
+
+
 void OptimizingCompilerThread::QueueForOptimization(
     OptimizingCompiler* optimizing_compiler) {
   input_queue_.Enqueue(optimizing_compiler);
diff --git a/deps/v8/src/optimizing-compiler-thread.h b/deps/v8/src/optimizing-compiler-thread.h
index d5627266d0..2d56d1a72b 100644
--- a/deps/v8/src/optimizing-compiler-thread.h
+++ b/deps/v8/src/optimizing-compiler-thread.h
@@ -29,8 +29,8 @@
 #define V8_OPTIMIZING_COMPILER_THREAD_H_
 
 #include "atomicops.h"
-#include "platform.h"
 #include "flags.h"
+#include "platform.h"
 #include "unbound-queue.h"
 
 namespace v8 {
@@ -38,14 +38,19 @@ namespace internal {
 
 class HGraphBuilder;
 class OptimizingCompiler;
+class SharedFunctionInfo;
 
 class OptimizingCompilerThread : public Thread {
  public:
   explicit OptimizingCompilerThread(Isolate *isolate) :
       Thread("OptimizingCompilerThread"),
+#ifdef DEBUG
+      thread_id_(0),
+#endif
       isolate_(isolate),
       stop_semaphore_(OS::CreateSemaphore(0)),
       input_queue_semaphore_(OS::CreateSemaphore(0)),
+      output_queue_semaphore_(OS::CreateSemaphore(0)),
       time_spent_compiling_(0),
       time_spent_total_(0) {
     NoBarrier_Store(&stop_thread_, static_cast<AtomicWord>(false));
@@ -57,6 +62,9 @@ class OptimizingCompilerThread : public Thread {
   void QueueForOptimization(OptimizingCompiler* optimizing_compiler);
   void InstallOptimizedFunctions();
 
+  // Wait for the next optimized function and install it.
+  Handle<SharedFunctionInfo> InstallNextOptimizedFunction();
+
   inline bool IsQueueAvailable() {
     // We don't need a barrier since we have a data dependency right
     // after.
@@ -76,24 +84,26 @@ class OptimizingCompilerThread : public Thread {
 #endif
 
   ~OptimizingCompilerThread() {
+    delete output_queue_semaphore_;  // Only used for manual mode.
     delete input_queue_semaphore_;
     delete stop_semaphore_;
   }
 
  private:
+#ifdef DEBUG
+  int thread_id_;
+#endif
+
   Isolate* isolate_;
   Semaphore* stop_semaphore_;
   Semaphore* input_queue_semaphore_;
+  Semaphore* output_queue_semaphore_;
   UnboundQueue<OptimizingCompiler*> input_queue_;
   UnboundQueue<OptimizingCompiler*> output_queue_;
   volatile AtomicWord stop_thread_;
   volatile Atomic32 queue_length_;
   int64_t time_spent_compiling_;
   int64_t time_spent_total_;
-
-#ifdef DEBUG
-  int thread_id_;
-#endif
 };
 
 } }  // namespace v8::internal
diff --git a/deps/v8/src/parser.cc b/deps/v8/src/parser.cc
index 37e903aac9..94d2f9e6a0 100644
--- a/deps/v8/src/parser.cc
+++ b/deps/v8/src/parser.cc
@@ -614,11 +614,6 @@ FunctionLiteral* Parser::DoParseProgram(CompilationInfo* info,
   ASSERT(target_stack_ == NULL);
   if (pre_data_ != NULL) pre_data_->Initialize();
 
-  // Compute the parsing mode.
-  Mode mode = (FLAG_lazy && allow_lazy_) ? PARSE_LAZILY : PARSE_EAGERLY;
-  if (allow_natives_syntax_ || extension_ != NULL) mode = PARSE_EAGERLY;
-  ParsingModeScope parsing_mode(this, mode);
-
   Handle<String> no_name = isolate()->factory()->empty_symbol();
 
   FunctionLiteral* result = NULL;
@@ -637,12 +632,19 @@ FunctionLiteral* Parser::DoParseProgram(CompilationInfo* info,
     scope->set_start_position(0);
     scope->set_end_position(source->length());
 
+    // Compute the parsing mode.
+    Mode mode = (FLAG_lazy && allow_lazy_) ? PARSE_LAZILY : PARSE_EAGERLY;
+    if (allow_natives_syntax_ || extension_ != NULL || scope->is_eval_scope()) {
+      mode = PARSE_EAGERLY;
+    }
+    ParsingModeScope parsing_mode(this, mode);
+
     FunctionState function_state(this, scope, isolate());  // Enters 'scope'.
     top_scope_->SetLanguageMode(info->language_mode());
     ZoneList<Statement*>* body = new(zone()) ZoneList<Statement*>(16, zone());
     bool ok = true;
     int beg_loc = scanner().location().beg_pos;
-    ParseSourceElements(body, Token::EOS, info->is_eval(), &ok);
+    ParseSourceElements(body, Token::EOS, info->is_eval(), true, &ok);
     if (ok && !top_scope_->is_classic_mode()) {
       CheckOctalLiteral(beg_loc, scanner().location().end_pos, &ok);
     }
@@ -832,145 +834,10 @@ void Parser::ReportMessageAt(Scanner::Location source_location,
 }
 
 
-// Base class containing common code for the different finder classes used by
-// the parser.
-class ParserFinder {
- protected:
-  ParserFinder() {}
-  static Assignment* AsAssignment(Statement* stat) {
-    if (stat == NULL) return NULL;
-    ExpressionStatement* exp_stat = stat->AsExpressionStatement();
-    if (exp_stat == NULL) return NULL;
-    return exp_stat->expression()->AsAssignment();
-  }
-};
-
-
-// An InitializationBlockFinder finds and marks sequences of statements of the
-// form expr.a = ...; expr.b = ...; etc.
-class InitializationBlockFinder : public ParserFinder {
- public:
-  // We find and mark the initialization blocks in top level
-  // non-looping code only. This is because the optimization prevents
-  // reuse of the map transitions, so it should be used only for code
-  // that will only be run once.
-  InitializationBlockFinder(Scope* top_scope, Target* target)
-      : enabled_(top_scope->DeclarationScope()->is_global_scope() &&
-                 !IsLoopTarget(target)),
-        first_in_block_(NULL),
-        last_in_block_(NULL),
-        block_size_(0) {}
-
-  ~InitializationBlockFinder() {
-    if (!enabled_) return;
-    if (InBlock()) EndBlock();
-  }
-
-  void Update(Statement* stat) {
-    if (!enabled_) return;
-    Assignment* assignment = AsAssignment(stat);
-    if (InBlock()) {
-      if (BlockContinues(assignment)) {
-        UpdateBlock(assignment);
-      } else {
-        EndBlock();
-      }
-    }
-    if (!InBlock() && (assignment != NULL) &&
-        (assignment->op() == Token::ASSIGN)) {
-      StartBlock(assignment);
-    }
-  }
-
- private:
-  // The minimum number of contiguous assignment that will
-  // be treated as an initialization block. Benchmarks show that
-  // the overhead exceeds the savings below this limit.
-  static const int kMinInitializationBlock = 3;
-
-  static bool IsLoopTarget(Target* target) {
-    while (target != NULL) {
-      if (target->node()->AsIterationStatement() != NULL) return true;
-      target = target->previous();
-    }
-    return false;
-  }
-
-  // Returns true if the expressions appear to denote the same object.
-  // In the context of initialization blocks, we only consider expressions
-  // of the form 'expr.x' or expr["x"].
-  static bool SameObject(Expression* e1, Expression* e2) {
-    VariableProxy* v1 = e1->AsVariableProxy();
-    VariableProxy* v2 = e2->AsVariableProxy();
-    if (v1 != NULL && v2 != NULL) {
-      return v1->name()->Equals(*v2->name());
-    }
-    Property* p1 = e1->AsProperty();
-    Property* p2 = e2->AsProperty();
-    if ((p1 == NULL) || (p2 == NULL)) return false;
-    Literal* key1 = p1->key()->AsLiteral();
-    Literal* key2 = p2->key()->AsLiteral();
-    if ((key1 == NULL) || (key2 == NULL)) return false;
-    if (!key1->handle()->IsString() || !key2->handle()->IsString()) {
-      return false;
-    }
-    String* name1 = String::cast(*key1->handle());
-    String* name2 = String::cast(*key2->handle());
-    if (!name1->Equals(name2)) return false;
-    return SameObject(p1->obj(), p2->obj());
-  }
-
-  // Returns true if the expressions appear to denote different properties
-  // of the same object.
-  static bool PropertyOfSameObject(Expression* e1, Expression* e2) {
-    Property* p1 = e1->AsProperty();
-    Property* p2 = e2->AsProperty();
-    if ((p1 == NULL) || (p2 == NULL)) return false;
-    return SameObject(p1->obj(), p2->obj());
-  }
-
-  bool BlockContinues(Assignment* assignment) {
-    if ((assignment == NULL) || (first_in_block_ == NULL)) return false;
-    if (assignment->op() != Token::ASSIGN) return false;
-    return PropertyOfSameObject(first_in_block_->target(),
-                                assignment->target());
-  }
-
-  void StartBlock(Assignment* assignment) {
-    first_in_block_ = assignment;
-    last_in_block_ = assignment;
-    block_size_ = 1;
-  }
-
-  void UpdateBlock(Assignment* assignment) {
-    last_in_block_ = assignment;
-    ++block_size_;
-  }
-
-  void EndBlock() {
-    if (block_size_ >= kMinInitializationBlock) {
-      first_in_block_->mark_block_start();
-      last_in_block_->mark_block_end();
-    }
-    last_in_block_ = first_in_block_ = NULL;
-    block_size_ = 0;
-  }
-
-  bool InBlock() { return first_in_block_ != NULL; }
-
-  const bool enabled_;
-  Assignment* first_in_block_;
-  Assignment* last_in_block_;
-  int block_size_;
-
-  DISALLOW_COPY_AND_ASSIGN(InitializationBlockFinder);
-};
-
-
 // A ThisNamedPropertyAssignmentFinder finds and marks statements of the form
 // this.x = ...;, where x is a named property. It also determines whether a
 // function contains only assignments of this type.
-class ThisNamedPropertyAssignmentFinder : public ParserFinder {
+class ThisNamedPropertyAssignmentFinder {
  public:
   ThisNamedPropertyAssignmentFinder(Isolate* isolate, Zone* zone)
       : isolate_(isolate),
@@ -981,6 +848,13 @@ class ThisNamedPropertyAssignmentFinder : public ParserFinder {
         zone_(zone) {
   }
 
+  static Assignment* AsAssignment(Statement* stat) {
+    if (stat == NULL) return NULL;
+    ExpressionStatement* exp_stat = stat->AsExpressionStatement();
+    if (exp_stat == NULL) return NULL;
+    return exp_stat->expression()->AsAssignment();
+  }
+
   void Update(Scope* scope, Statement* stat) {
     // Bail out if function already has property assignment that are
     // not simple this property assignments.
@@ -1135,6 +1009,7 @@ class ThisNamedPropertyAssignmentFinder : public ParserFinder {
 void* Parser::ParseSourceElements(ZoneList<Statement*>* processor,
                                   int end_token,
                                   bool is_eval,
+                                  bool is_global,
                                   bool* ok) {
   // SourceElements ::
   //   (ModuleElement)* <end_token>
@@ -1146,7 +1021,6 @@ void* Parser::ParseSourceElements(ZoneList<Statement*>* processor,
   TargetScope scope(&this->target_stack_);
 
   ASSERT(processor != NULL);
-  InitializationBlockFinder block_finder(top_scope_, target_stack_);
   ThisNamedPropertyAssignmentFinder this_property_assignment_finder(isolate(),
                                                                     zone());
   bool directive_prologue = true;     // Parsing directive prologue.
@@ -1157,7 +1031,12 @@ void* Parser::ParseSourceElements(ZoneList<Statement*>* processor,
     }
 
     Scanner::Location token_loc = scanner().peek_location();
-    Statement* stat = ParseModuleElement(NULL, CHECK_OK);
+    Statement* stat;
+    if (is_global && !is_eval) {
+      stat = ParseModuleElement(NULL, CHECK_OK);
+    } else {
+      stat = ParseBlockElement(NULL, CHECK_OK);
+    }
     if (stat == NULL || stat->IsEmpty()) {
       directive_prologue = false;   // End of directive prologue.
       continue;
@@ -1182,12 +1061,14 @@ void* Parser::ParseSourceElements(ZoneList<Statement*>* processor,
           // as specified in ES5 10.4.2(3). The correct fix would be to always
           // add this scope in DoParseProgram(), but that requires adaptations
           // all over the code base, so we go with a quick-fix for now.
+          // In the same manner, we have to patch the parsing mode.
           if (is_eval && !top_scope_->is_eval_scope()) {
             ASSERT(top_scope_->is_global_scope());
             Scope* scope = NewScope(top_scope_, EVAL_SCOPE);
             scope->set_start_position(top_scope_->start_position());
             scope->set_end_position(top_scope_->end_position());
             top_scope_ = scope;
+            mode_ = PARSE_EAGERLY;
           }
           // TODO(ES6): Fix entering extended mode, once it is specified.
           top_scope_->SetLanguageMode(FLAG_harmony_scoping
@@ -1201,7 +1082,6 @@ void* Parser::ParseSourceElements(ZoneList<Statement*>* processor,
       }
     }
 
-    block_finder.Update(stat);
     // Find and mark all assignments to named properties in this (this.x =)
     if (top_scope_->is_function_scope()) {
       this_property_assignment_finder.Update(top_scope_, stat);
@@ -1284,7 +1164,7 @@ Statement* Parser::ParseModuleDeclaration(ZoneStringList* names, bool* ok) {
 #endif
 
   Module* module = ParseModule(CHECK_OK);
-  VariableProxy* proxy = NewUnresolved(name, LET, module->interface());
+  VariableProxy* proxy = NewUnresolved(name, MODULE, module->interface());
   Declaration* declaration =
       factory()->NewModuleDeclaration(proxy, module, top_scope_);
   Declare(declaration, true, CHECK_OK);
@@ -1303,7 +1183,7 @@ Statement* Parser::ParseModuleDeclaration(ZoneStringList* names, bool* ok) {
   if (module->body() == NULL)
     return factory()->NewEmptyStatement();
   else
-    return module->body();
+    return factory()->NewModuleStatement(proxy, module->body());
 }
 
 
@@ -1354,13 +1234,11 @@ Module* Parser::ParseModuleLiteral(bool* ok) {
     TargetCollector collector(zone());
     Target target(&this->target_stack_, &collector);
     Target target_body(&this->target_stack_, body);
-    InitializationBlockFinder block_finder(top_scope_, target_stack_);
 
     while (peek() != Token::RBRACE) {
       Statement* stat = ParseModuleElement(NULL, CHECK_OK);
       if (stat && !stat->IsEmpty()) {
         body->AddStatement(stat, zone());
-        block_finder.Update(stat);
       }
     }
   }
@@ -1454,12 +1332,15 @@ Module* Parser::ParseModuleUrl(bool* ok) {
   if (FLAG_print_interface_details) PrintF("# Url ");
 #endif
 
-  Module* result = factory()->NewModuleUrl(symbol);
-  Interface* interface = result->interface();
+  // Create an empty literal as long as the feature isn't finished.
+  USE(symbol);
+  Scope* scope = NewScope(top_scope_, MODULE_SCOPE);
+  Block* body = factory()->NewBlock(NULL, 1, false);
+  body->set_scope(scope);
+  Interface* interface = scope->interface();
+  Module* result = factory()->NewModuleLiteral(body, interface);
   interface->Freeze(ok);
   ASSERT(*ok);
-  // Create dummy scope to avoid errors as long as the feature isn't finished.
-  Scope* scope = NewScope(top_scope_, MODULE_SCOPE);
   interface->Unify(scope->interface(), zone(), ok);
   ASSERT(*ok);
   return result;
@@ -1828,10 +1709,9 @@ void Parser::Declare(Declaration* declaration, bool resolve, bool* ok) {
         *ok = false;
         return;
       }
-      const char* type =
-          (var->mode() == VAR) ? "var" : var->is_const_mode() ? "const" : "let";
       Handle<String> type_string =
-          isolate()->factory()->NewStringFromUtf8(CStrVector(type), TENURED);
+          isolate()->factory()->NewStringFromUtf8(CStrVector("Variable"),
+                                                  TENURED);
       Expression* expression =
           NewThrowTypeError(isolate()->factory()->redeclaration_symbol(),
                             type_string, name);
@@ -2036,12 +1916,10 @@ Block* Parser::ParseBlock(ZoneStringList* labels, bool* ok) {
   Block* result = factory()->NewBlock(labels, 16, false);
   Target target(&this->target_stack_, result);
   Expect(Token::LBRACE, CHECK_OK);
-  InitializationBlockFinder block_finder(top_scope_, target_stack_);
   while (peek() != Token::RBRACE) {
     Statement* stat = ParseStatement(NULL, CHECK_OK);
     if (stat && !stat->IsEmpty()) {
       result->AddStatement(stat, zone());
-      block_finder.Update(stat);
     }
   }
   Expect(Token::RBRACE, CHECK_OK);
@@ -2066,13 +1944,11 @@ Block* Parser::ParseScopedBlock(ZoneStringList* labels, bool* ok) {
     TargetCollector collector(zone());
     Target target(&this->target_stack_, &collector);
     Target target_body(&this->target_stack_, body);
-    InitializationBlockFinder block_finder(top_scope_, target_stack_);
 
     while (peek() != Token::RBRACE) {
       Statement* stat = ParseBlockElement(NULL, CHECK_OK);
       if (stat && !stat->IsEmpty()) {
         body->AddStatement(stat, zone());
-        block_finder.Update(stat);
       }
     }
   }
@@ -2926,8 +2802,6 @@ Statement* Parser::ParseForStatement(ZoneStringList* labels, bool* ok) {
       if (peek() == Token::IN && !name.is_null()) {
         Interface* interface =
             is_const ? Interface::NewConst() : Interface::NewValue();
-        VariableProxy* each =
-            top_scope_->NewUnresolved(factory(), name, interface);
         ForInStatement* loop = factory()->NewForInStatement(labels);
         Target target(&this->target_stack_, loop);
 
@@ -2935,6 +2809,8 @@ Statement* Parser::ParseForStatement(ZoneStringList* labels, bool* ok) {
         Expression* enumerable = ParseExpression(true, CHECK_OK);
         Expect(Token::RPAREN, CHECK_OK);
 
+        VariableProxy* each =
+            top_scope_->NewUnresolved(factory(), name, interface);
         Statement* body = ParseStatement(NULL, CHECK_OK);
         loop->Initialize(each, enumerable, body);
         Block* result = factory()->NewBlock(NULL, 2, false);
@@ -2972,18 +2848,24 @@ Statement* Parser::ParseForStatement(ZoneStringList* labels, bool* ok) {
 
         // TODO(keuchel): Move the temporary variable to the block scope, after
         // implementing stack allocated block scoped variables.
-        Variable* temp = top_scope_->DeclarationScope()->NewTemporary(name);
+        Factory* heap_factory = isolate()->factory();
+        Handle<String> tempstr =
+            heap_factory->NewConsString(heap_factory->dot_for_symbol(), name);
+        Handle<String> tempname = heap_factory->LookupSymbol(tempstr);
+        Variable* temp = top_scope_->DeclarationScope()->NewTemporary(tempname);
         VariableProxy* temp_proxy = factory()->NewVariableProxy(temp);
-        Interface* interface = Interface::NewValue();
-        VariableProxy* each =
-            top_scope_->NewUnresolved(factory(), name, interface);
         ForInStatement* loop = factory()->NewForInStatement(labels);
         Target target(&this->target_stack_, loop);
 
+        // The expression does not see the loop variable.
         Expect(Token::IN, CHECK_OK);
+        top_scope_ = saved_scope;
         Expression* enumerable = ParseExpression(true, CHECK_OK);
+        top_scope_ = for_scope;
         Expect(Token::RPAREN, CHECK_OK);
 
+        VariableProxy* each =
+            top_scope_->NewUnresolved(factory(), name, Interface::NewValue());
         Statement* body = ParseStatement(NULL, CHECK_OK);
         Block* body_block = factory()->NewBlock(NULL, 3, false);
         Assignment* assignment = factory()->NewAssignment(
@@ -3327,7 +3209,8 @@ Expression* Parser::ParseUnaryExpression(bool* ok) {
       if (op == Token::NOT) {
         // Convert the literal to a boolean condition and negate it.
         bool condition = literal->ToBoolean()->IsTrue();
-        Handle<Object> result(isolate()->heap()->ToBoolean(!condition));
+        Handle<Object> result(isolate()->heap()->ToBoolean(!condition),
+                              isolate());
         return factory()->NewLiteral(result);
       } else if (literal->IsNumber()) {
         // Compute some expressions involving only number literals.
@@ -3835,17 +3718,16 @@ Expression* Parser::ParseArrayLiteral(bool* ok) {
   int literal_index = current_function_state_->NextMaterializedLiteralIndex();
 
   // Allocate a fixed array to hold all the object literals.
-  Handle<FixedArray> object_literals =
-      isolate()->factory()->NewFixedArray(values->length(), TENURED);
-  Handle<FixedDoubleArray> double_literals;
-  ElementsKind elements_kind = FAST_SMI_ELEMENTS;
-  bool has_only_undefined_values = true;
-  bool has_hole_values = false;
+  Handle<JSArray> array =
+      isolate()->factory()->NewJSArray(0, FAST_HOLEY_SMI_ELEMENTS);
+  isolate()->factory()->SetElementsCapacityAndLength(
+      array, values->length(), values->length());
 
   // Fill in the literals.
   Heap* heap = isolate()->heap();
   bool is_simple = true;
   int depth = 1;
+  bool is_holey = false;
   for (int i = 0, n = values->length(); i < n; i++) {
     MaterializedLiteral* m_literal = values->at(i)->AsMaterializedLiteral();
     if (m_literal != NULL && m_literal->depth() + 1 > depth) {
@@ -3853,91 +3735,33 @@ Expression* Parser::ParseArrayLiteral(bool* ok) {
     }
     Handle<Object> boilerplate_value = GetBoilerplateValue(values->at(i));
     if (boilerplate_value->IsTheHole()) {
-      has_hole_values = true;
-      object_literals->set_the_hole(i);
-      if (elements_kind == FAST_DOUBLE_ELEMENTS) {
-        double_literals->set_the_hole(i);
-      }
+      is_holey = true;
     } else if (boilerplate_value->IsUndefined()) {
       is_simple = false;
-      object_literals->set(i, Smi::FromInt(0));
-      if (elements_kind == FAST_DOUBLE_ELEMENTS) {
-        double_literals->set(i, 0);
-      }
+      JSObject::SetOwnElement(
+          array, i, handle(Smi::FromInt(0), isolate()), kNonStrictMode);
     } else {
-      // Examine each literal element, and adjust the ElementsKind if the
-      // literal element is not of a type that can be stored in the current
-      // ElementsKind.  Start with FAST_SMI_ONLY_ELEMENTS, and transition to
-      // FAST_DOUBLE_ELEMENTS and FAST_ELEMENTS as necessary.  Always remember
-      // the tagged value, no matter what the ElementsKind is in case we
-      // ultimately end up in FAST_ELEMENTS.
-      has_only_undefined_values = false;
-      object_literals->set(i, *boilerplate_value);
-      if (elements_kind == FAST_SMI_ELEMENTS) {
-        // Smi only elements. Notice if a transition to FAST_DOUBLE_ELEMENTS or
-        // FAST_ELEMENTS is required.
-        if (!boilerplate_value->IsSmi()) {
-          if (boilerplate_value->IsNumber() && FLAG_smi_only_arrays) {
-            // Allocate a double array on the FAST_DOUBLE_ELEMENTS transition to
-            // avoid over-allocating in TENURED space.
-            double_literals = isolate()->factory()->NewFixedDoubleArray(
-                values->length(), TENURED);
-            // Copy the contents of the FAST_SMI_ONLY_ELEMENT array to the
-            // FAST_DOUBLE_ELEMENTS array so that they are in sync.
-            for (int j = 0; j < i; ++j) {
-              Object* smi_value = object_literals->get(j);
-              if (smi_value->IsTheHole()) {
-                double_literals->set_the_hole(j);
-              } else {
-                double_literals->set(j, Smi::cast(smi_value)->value());
-              }
-            }
-            double_literals->set(i, boilerplate_value->Number());
-            elements_kind = FAST_DOUBLE_ELEMENTS;
-          } else {
-            elements_kind = FAST_ELEMENTS;
-          }
-        }
-      } else if (elements_kind == FAST_DOUBLE_ELEMENTS) {
-        // Continue to store double values in to FAST_DOUBLE_ELEMENTS arrays
-        // until the first value is seen that can't be stored as a double.
-        if (boilerplate_value->IsNumber()) {
-          double_literals->set(i, boilerplate_value->Number());
-        } else {
-          elements_kind = FAST_ELEMENTS;
-        }
-      }
+      JSObject::SetOwnElement(array, i, boilerplate_value, kNonStrictMode);
     }
   }
 
-  // Very small array literals that don't have a concrete hint about their type
-  // from a constant value should default to the slow case to avoid lots of
-  // elements transitions on really small objects.
-  if (has_only_undefined_values && values->length() <= 2) {
-    elements_kind = FAST_ELEMENTS;
-  }
+  Handle<FixedArrayBase> element_values(array->elements());
 
   // Simple and shallow arrays can be lazily copied, we transform the
   // elements array to a copy-on-write array.
   if (is_simple && depth == 1 && values->length() > 0 &&
-      elements_kind != FAST_DOUBLE_ELEMENTS) {
-    object_literals->set_map(heap->fixed_cow_array_map());
+      array->HasFastSmiOrObjectElements()) {
+    element_values->set_map(heap->fixed_cow_array_map());
   }
 
-  Handle<FixedArrayBase> element_values = elements_kind == FAST_DOUBLE_ELEMENTS
-      ? Handle<FixedArrayBase>(double_literals)
-      : Handle<FixedArrayBase>(object_literals);
-
   // Remember both the literal's constant values as well as the ElementsKind
   // in a 2-element FixedArray.
-  Handle<FixedArray> literals =
-      isolate()->factory()->NewFixedArray(2, TENURED);
+  Handle<FixedArray> literals = isolate()->factory()->NewFixedArray(2, TENURED);
 
-  if (has_hole_values || !FLAG_packed_arrays) {
-    elements_kind = GetHoleyElementsKind(elements_kind);
-  }
+  ElementsKind kind = array->GetElementsKind();
+  kind = is_holey ? GetHoleyElementsKind(kind) : GetPackedElementsKind(kind);
 
-  literals->set(0, Smi::FromInt(elements_kind));
+  literals->set(0, Smi::FromInt(kind));
   literals->set(1, *element_values);
 
   return factory()->NewArrayLiteral(
@@ -4667,7 +4491,7 @@ FunctionLiteral* Parser::ParseFunctionLiteral(Handle<String> function_name,
                                      RelocInfo::kNoPosition)),
                                      zone());
       }
-      ParseSourceElements(body, Token::RBRACE, false, CHECK_OK);
+      ParseSourceElements(body, Token::RBRACE, false, false, CHECK_OK);
 
       materialized_literal_count = function_state.materialized_literal_count();
       expected_property_count = function_state.expected_property_count();
diff --git a/deps/v8/src/parser.h b/deps/v8/src/parser.h
index 93dd03a63b..0f85f91583 100644
--- a/deps/v8/src/parser.h
+++ b/deps/v8/src/parser.h
@@ -96,7 +96,6 @@ class FunctionEntry BASE_EMBEDDED {
 
  private:
   Vector<unsigned> backing_;
-  bool owns_data_;
 };
 
 
@@ -454,7 +453,7 @@ class Parser {
   // construct a hashable id, so if more than 2^17 are allowed, this
   // should be checked.
   static const int kMaxNumFunctionParameters = 32766;
-  static const int kMaxNumFunctionLocals = 65535;
+  static const int kMaxNumFunctionLocals = 131071;  // 2^17-1
 
   enum Mode {
     PARSE_LAZILY,
@@ -590,8 +589,8 @@ class Parser {
   // which is set to false if parsing failed; it is unchanged otherwise.
   // By making the 'exception handling' explicit, we are forced to check
   // for failure at the call sites.
-  void* ParseSourceElements(ZoneList<Statement*>* processor,
-                            int end_token, bool is_eval, bool* ok);
+  void* ParseSourceElements(ZoneList<Statement*>* processor, int end_token,
+                            bool is_eval, bool is_global, bool* ok);
   Statement* ParseModuleElement(ZoneStringList* labels, bool* ok);
   Statement* ParseModuleDeclaration(ZoneStringList* names, bool* ok);
   Module* ParseModule(bool* ok);
diff --git a/deps/v8/src/platform-cygwin.cc b/deps/v8/src/platform-cygwin.cc
index 089ea38d9a..8c5e5b9083 100644
--- a/deps/v8/src/platform-cygwin.cc
+++ b/deps/v8/src/platform-cygwin.cc
@@ -359,6 +359,12 @@ bool VirtualMemory::Guard(void* address) {
 }
 
 
+bool VirtualMemory::HasLazyCommits() {
+  // TODO(alph): implement for the platform.
+  return false;
+}
+
+
 class Thread::PlatformData : public Malloced {
  public:
   PlatformData() : thread_(kNoThread) {}
@@ -649,24 +655,13 @@ class SamplerThread : public Thread {
     SamplerRegistry::State state;
     while ((state = SamplerRegistry::GetState()) !=
            SamplerRegistry::HAS_NO_SAMPLERS) {
-      bool cpu_profiling_enabled =
-          (state == SamplerRegistry::HAS_CPU_PROFILING_SAMPLERS);
-      bool runtime_profiler_enabled = RuntimeProfiler::IsEnabled();
       // When CPU profiling is enabled both JavaScript and C++ code is
       // profiled. We must not suspend.
-      if (!cpu_profiling_enabled) {
+      if (state == SamplerRegistry::HAS_CPU_PROFILING_SAMPLERS) {
+        SamplerRegistry::IterateActiveSamplers(&DoCpuProfile, this);
+      } else {
         if (rate_limiter_.SuspendIfNecessary()) continue;
       }
-      if (cpu_profiling_enabled) {
-        if (!SamplerRegistry::IterateActiveSamplers(&DoCpuProfile, this)) {
-          return;
-        }
-      }
-      if (runtime_profiler_enabled) {
-        if (!SamplerRegistry::IterateActiveSamplers(&DoRuntimeProfile, NULL)) {
-          return;
-        }
-      }
       OS::Sleep(interval_);
     }
   }
@@ -679,11 +674,6 @@ class SamplerThread : public Thread {
     sampler_thread->SampleContext(sampler);
   }
 
-  static void DoRuntimeProfile(Sampler* sampler, void* ignored) {
-    if (!sampler->isolate()->IsInitialized()) return;
-    sampler->isolate()->runtime_profiler()->NotifyTick();
-  }
-
   void SampleContext(Sampler* sampler) {
     HANDLE profiled_thread = sampler->platform_data()->profiled_thread();
     if (profiled_thread == NULL) return;
diff --git a/deps/v8/src/platform-freebsd.cc b/deps/v8/src/platform-freebsd.cc
index 738df11698..d02d668422 100644
--- a/deps/v8/src/platform-freebsd.cc
+++ b/deps/v8/src/platform-freebsd.cc
@@ -43,15 +43,12 @@
 #include <sys/fcntl.h>  // open
 #include <unistd.h>     // getpagesize
 // If you don't have execinfo.h then you need devel/libexecinfo from ports.
+#include <execinfo.h>   // backtrace, backtrace_symbols
 #include <strings.h>    // index
 #include <errno.h>
 #include <stdarg.h>
 #include <limits.h>
 
-#if !defined(__DragonFly__)
-#include <execinfo.h>   // backtrace, backtrace_symbols
-#endif
-
 #undef MAP_TYPE
 
 #include "v8.h"
@@ -299,9 +296,6 @@ void OS::SignalCodeMovingGC() {
 
 
 int OS::StackWalk(Vector<OS::StackFrame> frames) {
-#if defined(__DragonFly__)
-  return 0;
-#else
   int frames_size = frames.length();
   ScopedVector<void*> addresses(frames_size);
 
@@ -326,7 +320,6 @@ int OS::StackWalk(Vector<OS::StackFrame> frames) {
   free(symbols);
 
   return frames_count;
-#endif
 }
 
 
@@ -463,6 +456,12 @@ bool VirtualMemory::ReleaseRegion(void* base, size_t size) {
 }
 
 
+bool VirtualMemory::HasLazyCommits() {
+  // TODO(alph): implement for the platform.
+  return false;
+}
+
+
 class Thread::PlatformData : public Malloced {
  public:
   pthread_t thread_;  // Thread handle for pthread.
@@ -619,13 +618,6 @@ void FreeBSDSemaphore::Wait() {
 
 
 bool FreeBSDSemaphore::Wait(int timeout) {
-#if defined(__DragonFly__)
-  /* DragonFlyBSD lacks sem_timedwait() and there is no good way to emulate it.
-   */
-  if (sem_wait(&sem_)) abort();
-  USE(timeout);
-  return true;
-#else
   const long kOneSecondMicros = 1000000;  // NOLINT
 
   // Split timeout into second and nanosecond parts.
@@ -651,7 +643,6 @@ bool FreeBSDSemaphore::Wait(int timeout) {
     if (result == -1 && errno == ETIMEDOUT) return false;  // Timeout.
     CHECK(result == -1 && errno == EINTR);  // Signal caused spurious wakeup.
   }
-#endif
 }
 
 
@@ -721,11 +712,6 @@ static void ProfilerSignalHandler(int signal, siginfo_t* info, void* context) {
 
 class SignalSender : public Thread {
  public:
-  enum SleepInterval {
-    HALF_INTERVAL,
-    FULL_INTERVAL
-  };
-
   static const int kSignalSenderStackSize = 64 * KB;
 
   explicit SignalSender(int interval)
@@ -776,38 +762,14 @@ class SignalSender : public Thread {
     SamplerRegistry::State state;
     while ((state = SamplerRegistry::GetState()) !=
            SamplerRegistry::HAS_NO_SAMPLERS) {
-      bool cpu_profiling_enabled =
-          (state == SamplerRegistry::HAS_CPU_PROFILING_SAMPLERS);
-      bool runtime_profiler_enabled = RuntimeProfiler::IsEnabled();
       // When CPU profiling is enabled both JavaScript and C++ code is
       // profiled. We must not suspend.
-      if (!cpu_profiling_enabled) {
-        if (rate_limiter_.SuspendIfNecessary()) continue;
-      }
-      if (cpu_profiling_enabled && runtime_profiler_enabled) {
-        if (!SamplerRegistry::IterateActiveSamplers(&DoCpuProfile, this)) {
-          return;
-        }
-        Sleep(HALF_INTERVAL);
-        if (!SamplerRegistry::IterateActiveSamplers(&DoRuntimeProfile, NULL)) {
-          return;
-        }
-        Sleep(HALF_INTERVAL);
+      if (state == SamplerRegistry::HAS_CPU_PROFILING_SAMPLERS) {
+        SamplerRegistry::IterateActiveSamplers(&DoCpuProfile, this);
       } else {
-        if (cpu_profiling_enabled) {
-          if (!SamplerRegistry::IterateActiveSamplers(&DoCpuProfile,
-                                                      this)) {
-            return;
-          }
-        }
-        if (runtime_profiler_enabled) {
-          if (!SamplerRegistry::IterateActiveSamplers(&DoRuntimeProfile,
-                                                      NULL)) {
-            return;
-          }
-        }
-        Sleep(FULL_INTERVAL);
+        if (rate_limiter_.SuspendIfNecessary()) continue;
       }
+      Sleep();  // TODO(svenpanne) Figure out if OS:Sleep(interval_) is enough.
     }
   }
 
@@ -817,21 +779,15 @@ class SignalSender : public Thread {
     sender->SendProfilingSignal(sampler->platform_data()->vm_tid());
   }
 
-  static void DoRuntimeProfile(Sampler* sampler, void* ignored) {
-    if (!sampler->isolate()->IsInitialized()) return;
-    sampler->isolate()->runtime_profiler()->NotifyTick();
-  }
-
   void SendProfilingSignal(pthread_t tid) {
     if (!signal_handler_installed_) return;
     pthread_kill(tid, SIGPROF);
   }
 
-  void Sleep(SleepInterval full_or_half) {
+  void Sleep() {
     // Convert ms to us and subtract 100 us to compensate delays
     // occuring during signal delivery.
     useconds_t interval = interval_ * 1000 - 100;
-    if (full_or_half == HALF_INTERVAL) interval /= 2;
     int result = usleep(interval);
 #ifdef DEBUG
     if (result != 0 && errno != EINTR) {
diff --git a/deps/v8/src/platform-linux.cc b/deps/v8/src/platform-linux.cc
index 606d10236e..7a186413b5 100644
--- a/deps/v8/src/platform-linux.cc
+++ b/deps/v8/src/platform-linux.cc
@@ -148,6 +148,9 @@ bool OS::ArmCpuHasFeature(CpuFeature feature) {
     case ARMv7:
       search_string = "ARMv7";
       break;
+    case SUDIV:
+      search_string = "idiva";
+      break;
     default:
       UNREACHABLE();
   }
@@ -171,6 +174,24 @@ bool OS::ArmCpuHasFeature(CpuFeature feature) {
 }
 
 
+CpuImplementer OS::GetCpuImplementer() {
+  static bool use_cached_value = false;
+  static CpuImplementer cached_value = UNKNOWN_IMPLEMENTER;
+  if (use_cached_value) {
+    return cached_value;
+  }
+  if (CPUInfoContainsString("CPU implementer\t: 0x41")) {
+    cached_value = ARM_IMPLEMENTER;
+  } else if (CPUInfoContainsString("CPU implementer\t: 0x51")) {
+    cached_value = QUALCOMM_IMPLEMENTER;
+  } else {
+    cached_value = UNKNOWN_IMPLEMENTER;
+  }
+  use_cached_value = true;
+  return cached_value;
+}
+
+
 bool OS::ArmUsingHardFloat() {
   // GCC versions 4.6 and above define __ARM_PCS or __ARM_PCS_VFP to specify
   // the Floating Point ABI used (PCS stands for Procedure Call Standard).
@@ -701,6 +722,11 @@ bool VirtualMemory::ReleaseRegion(void* base, size_t size) {
 }
 
 
+bool VirtualMemory::HasLazyCommits() {
+  return true;
+}
+
+
 class Thread::PlatformData : public Malloced {
  public:
   PlatformData() : thread_(kNoThread) {}
@@ -1065,11 +1091,6 @@ class Sampler::PlatformData : public Malloced {
 
 class SignalSender : public Thread {
  public:
-  enum SleepInterval {
-    HALF_INTERVAL,
-    FULL_INTERVAL
-  };
-
   static const int kSignalSenderStackSize = 64 * KB;
 
   explicit SignalSender(int interval)
@@ -1125,43 +1146,16 @@ class SignalSender : public Thread {
     SamplerRegistry::State state;
     while ((state = SamplerRegistry::GetState()) !=
            SamplerRegistry::HAS_NO_SAMPLERS) {
-      bool cpu_profiling_enabled =
-          (state == SamplerRegistry::HAS_CPU_PROFILING_SAMPLERS);
-      bool runtime_profiler_enabled = RuntimeProfiler::IsEnabled();
-      if (cpu_profiling_enabled && !signal_handler_installed_) {
-        InstallSignalHandler();
-      } else if (!cpu_profiling_enabled && signal_handler_installed_) {
-        RestoreSignalHandler();
-      }
       // When CPU profiling is enabled both JavaScript and C++ code is
       // profiled. We must not suspend.
-      if (!cpu_profiling_enabled) {
-        if (rate_limiter_.SuspendIfNecessary()) continue;
-      }
-      if (cpu_profiling_enabled && runtime_profiler_enabled) {
-        if (!SamplerRegistry::IterateActiveSamplers(&DoCpuProfile, this)) {
-          return;
-        }
-        Sleep(HALF_INTERVAL);
-        if (!SamplerRegistry::IterateActiveSamplers(&DoRuntimeProfile, NULL)) {
-          return;
-        }
-        Sleep(HALF_INTERVAL);
+      if (state == SamplerRegistry::HAS_CPU_PROFILING_SAMPLERS) {
+        if (!signal_handler_installed_) InstallSignalHandler();
+        SamplerRegistry::IterateActiveSamplers(&DoCpuProfile, this);
       } else {
-        if (cpu_profiling_enabled) {
-          if (!SamplerRegistry::IterateActiveSamplers(&DoCpuProfile,
-                                                      this)) {
-            return;
-          }
-        }
-        if (runtime_profiler_enabled) {
-          if (!SamplerRegistry::IterateActiveSamplers(&DoRuntimeProfile,
-                                                      NULL)) {
-            return;
-          }
-        }
-        Sleep(FULL_INTERVAL);
+        if (signal_handler_installed_) RestoreSignalHandler();
+        if (rate_limiter_.SuspendIfNecessary()) continue;
       }
+      Sleep();  // TODO(svenpanne) Figure out if OS:Sleep(interval_) is enough.
     }
   }
 
@@ -1171,11 +1165,6 @@ class SignalSender : public Thread {
     sender->SendProfilingSignal(sampler->platform_data()->vm_tid());
   }
 
-  static void DoRuntimeProfile(Sampler* sampler, void* ignored) {
-    if (!sampler->isolate()->IsInitialized()) return;
-    sampler->isolate()->runtime_profiler()->NotifyTick();
-  }
-
   void SendProfilingSignal(int tid) {
     if (!signal_handler_installed_) return;
     // Glibc doesn't provide a wrapper for tgkill(2).
@@ -1186,11 +1175,10 @@ class SignalSender : public Thread {
 #endif
   }
 
-  void Sleep(SleepInterval full_or_half) {
+  void Sleep() {
     // Convert ms to us and subtract 100 us to compensate delays
     // occuring during signal delivery.
     useconds_t interval = interval_ * 1000 - 100;
-    if (full_or_half == HALF_INTERVAL) interval /= 2;
 #if defined(ANDROID)
     usleep(interval);
 #else
diff --git a/deps/v8/src/platform-macos.cc b/deps/v8/src/platform-macos.cc
index a216f6e4ca..e69833885c 100644
--- a/deps/v8/src/platform-macos.cc
+++ b/deps/v8/src/platform-macos.cc
@@ -471,6 +471,11 @@ bool VirtualMemory::ReleaseRegion(void* address, size_t size) {
 }
 
 
+bool VirtualMemory::HasLazyCommits() {
+  return false;
+}
+
+
 class Thread::PlatformData : public Malloced {
  public:
   PlatformData() : thread_(kNoThread) {}
@@ -782,24 +787,13 @@ class SamplerThread : public Thread {
     SamplerRegistry::State state;
     while ((state = SamplerRegistry::GetState()) !=
            SamplerRegistry::HAS_NO_SAMPLERS) {
-      bool cpu_profiling_enabled =
-          (state == SamplerRegistry::HAS_CPU_PROFILING_SAMPLERS);
-      bool runtime_profiler_enabled = RuntimeProfiler::IsEnabled();
       // When CPU profiling is enabled both JavaScript and C++ code is
       // profiled. We must not suspend.
-      if (!cpu_profiling_enabled) {
+      if (state == SamplerRegistry::HAS_CPU_PROFILING_SAMPLERS) {
+        SamplerRegistry::IterateActiveSamplers(&DoCpuProfile, this);
+      } else {
         if (rate_limiter_.SuspendIfNecessary()) continue;
       }
-      if (cpu_profiling_enabled) {
-        if (!SamplerRegistry::IterateActiveSamplers(&DoCpuProfile, this)) {
-          return;
-        }
-      }
-      if (runtime_profiler_enabled) {
-        if (!SamplerRegistry::IterateActiveSamplers(&DoRuntimeProfile, NULL)) {
-          return;
-        }
-      }
       OS::Sleep(interval_);
     }
   }
@@ -812,11 +806,6 @@ class SamplerThread : public Thread {
     sampler_thread->SampleContext(sampler);
   }
 
-  static void DoRuntimeProfile(Sampler* sampler, void* ignored) {
-    if (!sampler->isolate()->IsInitialized()) return;
-    sampler->isolate()->runtime_profiler()->NotifyTick();
-  }
-
   void SampleContext(Sampler* sampler) {
     thread_act_t profiled_thread = sampler->platform_data()->profiled_thread();
     TickSample sample_obj;
diff --git a/deps/v8/src/platform-nullos.cc b/deps/v8/src/platform-nullos.cc
index 679ef8e89e..ccd21231ea 100644
--- a/deps/v8/src/platform-nullos.cc
+++ b/deps/v8/src/platform-nullos.cc
@@ -1,4 +1,4 @@
-// Copyright 2006-2008 the V8 project authors. All rights reserved.
+// Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
@@ -215,6 +215,11 @@ double OS::nan_value() {
 }
 
 
+CpuImplementer OS::GetCpuImplementer() {
+  UNIMPLEMENTED();
+}
+
+
 bool OS::ArmCpuHasFeature(CpuFeature feature) {
   UNIMPLEMENTED();
 }
@@ -335,6 +340,12 @@ bool VirtualMemory::Guard(void* address) {
 }
 
 
+bool VirtualMemory::HasLazyCommits() {
+  // TODO(alph): implement for the platform.
+  return false;
+}
+
+
 class Thread::PlatformData : public Malloced {
  public:
   PlatformData() {
diff --git a/deps/v8/src/platform-openbsd.cc b/deps/v8/src/platform-openbsd.cc
index 408d4dc0f8..d4ab9a66ee 100644
--- a/deps/v8/src/platform-openbsd.cc
+++ b/deps/v8/src/platform-openbsd.cc
@@ -504,6 +504,12 @@ bool VirtualMemory::ReleaseRegion(void* base, size_t size) {
 }
 
 
+bool VirtualMemory::HasLazyCommits() {
+  // TODO(alph): implement for the platform.
+  return false;
+}
+
+
 class Thread::PlatformData : public Malloced {
  public:
   PlatformData() : thread_(kNoThread) {}
@@ -778,11 +784,6 @@ class Sampler::PlatformData : public Malloced {
 
 class SignalSender : public Thread {
  public:
-  enum SleepInterval {
-    HALF_INTERVAL,
-    FULL_INTERVAL
-  };
-
   static const int kSignalSenderStackSize = 64 * KB;
 
   explicit SignalSender(int interval)
@@ -838,43 +839,16 @@ class SignalSender : public Thread {
     SamplerRegistry::State state;
     while ((state = SamplerRegistry::GetState()) !=
            SamplerRegistry::HAS_NO_SAMPLERS) {
-      bool cpu_profiling_enabled =
-          (state == SamplerRegistry::HAS_CPU_PROFILING_SAMPLERS);
-      bool runtime_profiler_enabled = RuntimeProfiler::IsEnabled();
-      if (cpu_profiling_enabled && !signal_handler_installed_) {
-        InstallSignalHandler();
-      } else if (!cpu_profiling_enabled && signal_handler_installed_) {
-        RestoreSignalHandler();
-      }
       // When CPU profiling is enabled both JavaScript and C++ code is
       // profiled. We must not suspend.
-      if (!cpu_profiling_enabled) {
-        if (rate_limiter_.SuspendIfNecessary()) continue;
-      }
-      if (cpu_profiling_enabled && runtime_profiler_enabled) {
-        if (!SamplerRegistry::IterateActiveSamplers(&DoCpuProfile, this)) {
-          return;
-        }
-        Sleep(HALF_INTERVAL);
-        if (!SamplerRegistry::IterateActiveSamplers(&DoRuntimeProfile, NULL)) {
-          return;
-        }
-        Sleep(HALF_INTERVAL);
+      if (state == SamplerRegistry::HAS_CPU_PROFILING_SAMPLERS) {
+        if (!signal_handler_installed_) InstallSignalHandler();
+        SamplerRegistry::IterateActiveSamplers(&DoCpuProfile, this);
       } else {
-        if (cpu_profiling_enabled) {
-          if (!SamplerRegistry::IterateActiveSamplers(&DoCpuProfile,
-                                                      this)) {
-            return;
-          }
-        }
-        if (runtime_profiler_enabled) {
-          if (!SamplerRegistry::IterateActiveSamplers(&DoRuntimeProfile,
-                                                      NULL)) {
-            return;
-          }
-        }
-        Sleep(FULL_INTERVAL);
+        if (signal_handler_installed_) RestoreSignalHandler();
+        if (rate_limiter_.SuspendIfNecessary()) continue;
       }
+      Sleep();  // TODO(svenpanne) Figure out if OS:Sleep(interval_) is enough.
     }
   }
 
@@ -884,21 +858,15 @@ class SignalSender : public Thread {
     sender->SendProfilingSignal(sampler->platform_data()->vm_tid());
   }
 
-  static void DoRuntimeProfile(Sampler* sampler, void* ignored) {
-    if (!sampler->isolate()->IsInitialized()) return;
-    sampler->isolate()->runtime_profiler()->NotifyTick();
-  }
-
   void SendProfilingSignal(pthread_t tid) {
     if (!signal_handler_installed_) return;
     pthread_kill(tid, SIGPROF);
   }
 
-  void Sleep(SleepInterval full_or_half) {
+  void Sleep() {
     // Convert ms to us and subtract 100 us to compensate delays
     // occuring during signal delivery.
     useconds_t interval = interval_ * 1000 - 100;
-    if (full_or_half == HALF_INTERVAL) interval /= 2;
     int result = usleep(interval);
 #ifdef DEBUG
     if (result != 0 && errno != EINTR) {
diff --git a/deps/v8/src/platform-posix.cc b/deps/v8/src/platform-posix.cc
index 2b80015161..0016d59d3a 100644
--- a/deps/v8/src/platform-posix.cc
+++ b/deps/v8/src/platform-posix.cc
@@ -109,20 +109,11 @@ void* OS::GetRandomMmapAddr() {
     raw_addr &= V8_UINT64_C(0x3ffffffff000);
 #else
     uint32_t raw_addr = V8::RandomPrivate(isolate);
-
-    // For our 32-bit mmap() hint, we pick a random address in the bottom
-    // half of the top half of the address space (that is, the third quarter).
-    // Because we do not MAP_FIXED, this will be treated only as a hint -- the
-    // system will not fail to mmap() because something else happens to already
-    // be mapped at our random address. We deliberately set the hint high enough
-    // to get well above the system's break (that is, the heap); systems will
-    // either try the hint and if that fails move higher (MacOS and other BSD
-    // derivatives) or try the hint and if that fails allocate as if there were
-    // no hint at all (Linux, Solaris, illumos and derivatives). The high hint
-    // prevents the break from getting hemmed in at low values, ceding half of
-    // the address space to the system heap.
+    // The range 0x20000000 - 0x60000000 is relatively unpopulated across a
+    // variety of ASLR modes (PAE kernel, NX compat mode, etc) and on macos
+    // 10.6 and 10.7.
     raw_addr &= 0x3ffff000;
-    raw_addr += 0x80000000;
+    raw_addr += 0x20000000;
 #endif
     return reinterpret_cast<void*>(raw_addr);
   }
@@ -151,11 +142,19 @@ UNARY_MATH_FUNCTION(sin, CreateTranscendentalFunction(TranscendentalCache::SIN))
 UNARY_MATH_FUNCTION(cos, CreateTranscendentalFunction(TranscendentalCache::COS))
 UNARY_MATH_FUNCTION(tan, CreateTranscendentalFunction(TranscendentalCache::TAN))
 UNARY_MATH_FUNCTION(log, CreateTranscendentalFunction(TranscendentalCache::LOG))
+UNARY_MATH_FUNCTION(exp, CreateExpFunction())
 UNARY_MATH_FUNCTION(sqrt, CreateSqrtFunction())
 
 #undef MATH_FUNCTION
 
 
+void lazily_initialize_fast_exp() {
+  if (fast_exp_function == NULL) {
+    init_fast_exp_function();
+  }
+}
+
+
 double OS::nan_value() {
   // NAN from math.h is defined in C99 and not in POSIX.
   return NAN;
@@ -341,6 +340,7 @@ void POSIXPostSetUp() {
   init_fast_cos_function();
   init_fast_tan_function();
   init_fast_log_function();
+  // fast_exp is initialized lazily.
   init_fast_sqrt_function();
 }
 
diff --git a/deps/v8/src/platform-solaris.cc b/deps/v8/src/platform-solaris.cc
index 4248ea214f..70f86596e8 100644
--- a/deps/v8/src/platform-solaris.cc
+++ b/deps/v8/src/platform-solaris.cc
@@ -125,12 +125,8 @@ const char* OS::LocalTimezone(double time) {
 
 
 double OS::LocalTimeOffset() {
-  // On Solaris, struct tm does not contain a tm_gmtoff field.
-  time_t utc = time(NULL);
-  ASSERT(utc != -1);
-  struct tm* loc = localtime(&utc);
-  ASSERT(loc != NULL);
-  return static_cast<double>((mktime(loc) - utc) * msPerSecond);
+  tzset();
+  return -static_cast<double>(timezone * msPerSecond);
 }
 
 
@@ -448,6 +444,12 @@ bool VirtualMemory::ReleaseRegion(void* base, size_t size) {
 }
 
 
+bool VirtualMemory::HasLazyCommits() {
+  // TODO(alph): implement for the platform.
+  return false;
+}
+
+
 class Thread::PlatformData : public Malloced {
  public:
   PlatformData() : thread_(kNoThread) {  }
@@ -699,11 +701,6 @@ class Sampler::PlatformData : public Malloced {
 
 class SignalSender : public Thread {
  public:
-  enum SleepInterval {
-    HALF_INTERVAL,
-    FULL_INTERVAL
-  };
-
   static const int kSignalSenderStackSize = 64 * KB;
 
   explicit SignalSender(int interval)
@@ -758,44 +755,16 @@ class SignalSender : public Thread {
     SamplerRegistry::State state;
     while ((state = SamplerRegistry::GetState()) !=
            SamplerRegistry::HAS_NO_SAMPLERS) {
-      bool cpu_profiling_enabled =
-          (state == SamplerRegistry::HAS_CPU_PROFILING_SAMPLERS);
-      bool runtime_profiler_enabled = RuntimeProfiler::IsEnabled();
-      if (cpu_profiling_enabled && !signal_handler_installed_) {
-        InstallSignalHandler();
-      } else if (!cpu_profiling_enabled && signal_handler_installed_) {
-        RestoreSignalHandler();
-      }
-
       // When CPU profiling is enabled both JavaScript and C++ code is
       // profiled. We must not suspend.
-      if (!cpu_profiling_enabled) {
-        if (rate_limiter_.SuspendIfNecessary()) continue;
-      }
-      if (cpu_profiling_enabled && runtime_profiler_enabled) {
-        if (!SamplerRegistry::IterateActiveSamplers(&DoCpuProfile, this)) {
-          return;
-        }
-        Sleep(HALF_INTERVAL);
-        if (!SamplerRegistry::IterateActiveSamplers(&DoRuntimeProfile, NULL)) {
-          return;
-        }
-        Sleep(HALF_INTERVAL);
+      if (state == SamplerRegistry::HAS_CPU_PROFILING_SAMPLERS) {
+        if (!signal_handler_installed_) InstallSignalHandler();
+        SamplerRegistry::IterateActiveSamplers(&DoCpuProfile, this);
       } else {
-        if (cpu_profiling_enabled) {
-          if (!SamplerRegistry::IterateActiveSamplers(&DoCpuProfile,
-                                                      this)) {
-            return;
-          }
-        }
-        if (runtime_profiler_enabled) {
-          if (!SamplerRegistry::IterateActiveSamplers(&DoRuntimeProfile,
-                                                      NULL)) {
-            return;
-          }
-        }
-        Sleep(FULL_INTERVAL);
+        if (signal_handler_installed_) RestoreSignalHandler();
+        if (rate_limiter_.SuspendIfNecessary()) continue;
       }
+      Sleep();  // TODO(svenpanne) Figure out if OS:Sleep(interval_) is enough.
     }
   }
 
@@ -805,21 +774,15 @@ class SignalSender : public Thread {
     sender->SendProfilingSignal(sampler->platform_data()->vm_tid());
   }
 
-  static void DoRuntimeProfile(Sampler* sampler, void* ignored) {
-    if (!sampler->isolate()->IsInitialized()) return;
-    sampler->isolate()->runtime_profiler()->NotifyTick();
-  }
-
   void SendProfilingSignal(pthread_t tid) {
     if (!signal_handler_installed_) return;
     pthread_kill(tid, SIGPROF);
   }
 
-  void Sleep(SleepInterval full_or_half) {
+  void Sleep() {
     // Convert ms to us and subtract 100 us to compensate delays
     // occuring during signal delivery.
     useconds_t interval = interval_ * 1000 - 100;
-    if (full_or_half == HALF_INTERVAL) interval /= 2;
     int result = usleep(interval);
 #ifdef DEBUG
     if (result != 0 && errno != EINTR) {
diff --git a/deps/v8/src/platform-win32.cc b/deps/v8/src/platform-win32.cc
index 49463be8e0..f00d6b01b2 100644
--- a/deps/v8/src/platform-win32.cc
+++ b/deps/v8/src/platform-win32.cc
@@ -199,11 +199,19 @@ UNARY_MATH_FUNCTION(sin, CreateTranscendentalFunction(TranscendentalCache::SIN))
 UNARY_MATH_FUNCTION(cos, CreateTranscendentalFunction(TranscendentalCache::COS))
 UNARY_MATH_FUNCTION(tan, CreateTranscendentalFunction(TranscendentalCache::TAN))
 UNARY_MATH_FUNCTION(log, CreateTranscendentalFunction(TranscendentalCache::LOG))
+UNARY_MATH_FUNCTION(exp, CreateExpFunction())
 UNARY_MATH_FUNCTION(sqrt, CreateSqrtFunction())
 
 #undef MATH_FUNCTION
 
 
+void lazily_initialize_fast_exp() {
+  if (fast_exp_function == NULL) {
+    init_fast_exp_function();
+  }
+}
+
+
 void MathSetup() {
 #ifdef _WIN64
   init_modulo_function();
@@ -212,6 +220,7 @@ void MathSetup() {
   init_fast_cos_function();
   init_fast_tan_function();
   init_fast_log_function();
+  // fast_exp is initialized lazily.
   init_fast_sqrt_function();
 }
 
@@ -1551,6 +1560,12 @@ bool VirtualMemory::ReleaseRegion(void* base, size_t size) {
 }
 
 
+bool VirtualMemory::HasLazyCommits() {
+  // TODO(alph): implement for the platform.
+  return false;
+}
+
+
 // ----------------------------------------------------------------------------
 // Win32 thread support.
 
@@ -1995,24 +2010,13 @@ class SamplerThread : public Thread {
     SamplerRegistry::State state;
     while ((state = SamplerRegistry::GetState()) !=
            SamplerRegistry::HAS_NO_SAMPLERS) {
-      bool cpu_profiling_enabled =
-          (state == SamplerRegistry::HAS_CPU_PROFILING_SAMPLERS);
-      bool runtime_profiler_enabled = RuntimeProfiler::IsEnabled();
       // When CPU profiling is enabled both JavaScript and C++ code is
       // profiled. We must not suspend.
-      if (!cpu_profiling_enabled) {
+      if (state == SamplerRegistry::HAS_CPU_PROFILING_SAMPLERS) {
+        SamplerRegistry::IterateActiveSamplers(&DoCpuProfile, this);
+      } else {
         if (rate_limiter_.SuspendIfNecessary()) continue;
       }
-      if (cpu_profiling_enabled) {
-        if (!SamplerRegistry::IterateActiveSamplers(&DoCpuProfile, this)) {
-          return;
-        }
-      }
-      if (runtime_profiler_enabled) {
-        if (!SamplerRegistry::IterateActiveSamplers(&DoRuntimeProfile, NULL)) {
-          return;
-        }
-      }
       OS::Sleep(interval_);
     }
   }
@@ -2025,11 +2029,6 @@ class SamplerThread : public Thread {
     sampler_thread->SampleContext(sampler);
   }
 
-  static void DoRuntimeProfile(Sampler* sampler, void* ignored) {
-    if (!sampler->isolate()->IsInitialized()) return;
-    sampler->isolate()->runtime_profiler()->NotifyTick();
-  }
-
   void SampleContext(Sampler* sampler) {
     HANDLE profiled_thread = sampler->platform_data()->profiled_thread();
     if (profiled_thread == NULL) return;
diff --git a/deps/v8/src/platform.h b/deps/v8/src/platform.h
index a32fbbc028..6f75ca83d5 100644
--- a/deps/v8/src/platform.h
+++ b/deps/v8/src/platform.h
@@ -107,7 +107,11 @@ namespace internal {
 
 // Use AtomicWord for a machine-sized pointer. It is assumed that
 // reads and writes of naturally aligned values of this type are atomic.
+#if defined(__OpenBSD__) && defined(__i386__)
+typedef Atomic32 AtomicWord;
+#else
 typedef intptr_t AtomicWord;
+#endif
 
 class Semaphore;
 class Mutex;
@@ -115,12 +119,16 @@ class Mutex;
 double ceiling(double x);
 double modulo(double x, double y);
 
-// Custom implementation of sin, cos, tan and log.
+// Custom implementation of math functions.
 double fast_sin(double input);
 double fast_cos(double input);
 double fast_tan(double input);
 double fast_log(double input);
+double fast_exp(double input);
 double fast_sqrt(double input);
+// The custom exp implementation needs 16KB of lookup data; initialize it
+// on demand.
+void lazily_initialize_fast_exp();
 
 // Forward declarations.
 class Socket;
@@ -304,6 +312,9 @@ class OS {
   // Returns the double constant NAN
   static double nan_value();
 
+  // Support runtime detection of Cpu implementer
+  static CpuImplementer GetCpuImplementer();
+
   // Support runtime detection of VFP3 on ARM CPUs.
   static bool ArmCpuHasFeature(CpuFeature feature);
 
@@ -425,6 +436,11 @@ class VirtualMemory {
   // and the same size it was reserved with.
   static bool ReleaseRegion(void* base, size_t size);
 
+  // Returns true if OS performs lazy commits, i.e. the memory allocation call
+  // defers actual physical memory allocation till the first memory access.
+  // Otherwise returns false.
+  static bool HasLazyCommits();
+
  private:
   void* address_;  // Start address of the virtual memory.
   size_t size_;  // Size of the virtual memory.
diff --git a/deps/v8/src/preparser.h b/deps/v8/src/preparser.h
index 13261f7a5b..ad52d74bbd 100644
--- a/deps/v8/src/preparser.h
+++ b/deps/v8/src/preparser.h
@@ -150,11 +150,11 @@ class PreParser {
 
   // Parses a single function literal, from the opening parentheses before
   // parameters to the closing brace after the body.
-  // Returns a FunctionEntry describing the body of the funciton in enough
+  // Returns a FunctionEntry describing the body of the function in enough
   // detail that it can be lazily compiled.
   // The scanner is expected to have matched the "function" keyword and
   // parameters, and have consumed the initial '{'.
-  // At return, unless an error occured, the scanner is positioned before the
+  // At return, unless an error occurred, the scanner is positioned before the
   // the final '}'.
   PreParseResult PreParseLazyFunction(i::LanguageMode mode,
                                       i::ParserRecorder* log);
diff --git a/deps/v8/src/prettyprinter.cc b/deps/v8/src/prettyprinter.cc
index 0d8dadce1a..602fbb40b9 100644
--- a/deps/v8/src/prettyprinter.cc
+++ b/deps/v8/src/prettyprinter.cc
@@ -122,6 +122,14 @@ void PrettyPrinter::VisitModuleUrl(ModuleUrl* node) {
 }
 
 
+void PrettyPrinter::VisitModuleStatement(ModuleStatement* node) {
+  Print("module ");
+  PrintLiteral(node->proxy()->name(), false);
+  Print(" ");
+  Visit(node->body());
+}
+
+
 void PrettyPrinter::VisitExpressionStatement(ExpressionStatement* node) {
   Visit(node->expression());
   Print(";");
@@ -822,6 +830,13 @@ void AstPrinter::VisitModuleUrl(ModuleUrl* node) {
 }
 
 
+void AstPrinter::VisitModuleStatement(ModuleStatement* node) {
+  IndentedScope indent(this, "MODULE");
+  PrintLiteralIndented("NAME", node->proxy()->name(), true);
+  PrintStatements(node->body()->statements());
+}
+
+
 void AstPrinter::VisitExpressionStatement(ExpressionStatement* node) {
   Visit(node->expression());
 }
diff --git a/deps/v8/src/profile-generator-inl.h b/deps/v8/src/profile-generator-inl.h
index 02e146f14a..e4f32a7c7a 100644
--- a/deps/v8/src/profile-generator-inl.h
+++ b/deps/v8/src/profile-generator-inl.h
@@ -84,7 +84,7 @@ CodeEntry* ProfileGenerator::EntryForVMState(StateTag tag) {
       return gc_entry_;
     case JS:
     case COMPILER:
-    case PARALLEL_COMPILER_PROLOGUE:
+    case PARALLEL_COMPILER:
     // DOM events handlers are reported as OTHER / EXTERNAL entries.
     // To avoid confusing people, let's put all these entries into
     // one bucket.
diff --git a/deps/v8/src/profile-generator.cc b/deps/v8/src/profile-generator.cc
index c3b7622b09..6e49c7bd9e 100644
--- a/deps/v8/src/profile-generator.cc
+++ b/deps/v8/src/profile-generator.cc
@@ -1644,12 +1644,14 @@ HeapObject* const V8HeapExplorer::kLastGcSubrootObject =
 
 V8HeapExplorer::V8HeapExplorer(
     HeapSnapshot* snapshot,
-    SnapshottingProgressReportingInterface* progress)
+    SnapshottingProgressReportingInterface* progress,
+    v8::HeapProfiler::ObjectNameResolver* resolver)
     : heap_(Isolate::Current()->heap()),
       snapshot_(snapshot),
       collection_(snapshot_->collection()),
       progress_(progress),
-      filler_(NULL) {
+      filler_(NULL),
+      global_object_name_resolver_(resolver) {
 }
 
 
@@ -1774,7 +1776,14 @@ void V8HeapExplorer::AddRootEntries(SnapshotFillerInterface* filler) {
 
 const char* V8HeapExplorer::GetSystemEntryName(HeapObject* object) {
   switch (object->map()->instance_type()) {
-    case MAP_TYPE: return "system / Map";
+    case MAP_TYPE:
+      switch (Map::cast(object)->instance_type()) {
+#define MAKE_STRING_MAP_CASE(instance_type, size, name, Name) \
+        case instance_type: return "system / Map (" #Name ")";
+      STRING_TYPE_LIST(MAKE_STRING_MAP_CASE)
+#undef MAKE_STRING_MAP_CASE
+        default: return "system / Map";
+      }
     case JS_GLOBAL_PROPERTY_CELL_TYPE: return "system / JSGlobalPropertyCell";
     case FOREIGN_TYPE: return "system / Foreign";
     case ODDBALL_TYPE: return "system / Oddball";
@@ -1851,7 +1860,6 @@ void V8HeapExplorer::ExtractReferences(HeapObject* obj) {
     ExtractJSObjectReferences(entry, JSObject::cast(obj));
   } else if (obj->IsString()) {
     ExtractStringReferences(entry, String::cast(obj));
-    extract_indexed_refs = false;
   } else if (obj->IsContext()) {
     ExtractContextReferences(entry, Context::cast(obj));
   } else if (obj->IsMap()) {
@@ -1966,11 +1974,14 @@ void V8HeapExplorer::ExtractJSObjectReferences(
 void V8HeapExplorer::ExtractStringReferences(int entry, String* string) {
   if (string->IsConsString()) {
     ConsString* cs = ConsString::cast(string);
-    SetInternalReference(cs, entry, "first", cs->first());
-    SetInternalReference(cs, entry, "second", cs->second());
+    SetInternalReference(cs, entry, "first", cs->first(),
+                         ConsString::kFirstOffset);
+    SetInternalReference(cs, entry, "second", cs->second(),
+                         ConsString::kSecondOffset);
   } else if (string->IsSlicedString()) {
     SlicedString* ss = SlicedString::cast(string);
-    SetInternalReference(ss, entry, "parent", ss->parent());
+    SetInternalReference(ss, entry, "parent", ss->parent(),
+                         SlicedString::kParentOffset);
   }
 }
 
@@ -1988,7 +1999,7 @@ void V8HeapExplorer::ExtractContextReferences(int entry, Context* context) {
               "(context func. result caches)");
     TagObject(context->normalized_map_cache(), "(context norm. map cache)");
     TagObject(context->runtime_context(), "(runtime context)");
-    TagObject(context->data(), "(context data)");
+    TagObject(context->embedder_data(), "(context data)");
     NATIVE_CONTEXT_FIELDS(EXTRACT_CONTEXT_FIELD);
 #undef EXTRACT_CONTEXT_FIELD
     for (int i = Context::FIRST_WEAK_SLOT;
@@ -2009,21 +2020,32 @@ void V8HeapExplorer::ExtractMapReferences(int entry, Map* map) {
                        Map::kConstructorOffset);
   if (map->HasTransitionArray()) {
     TransitionArray* transitions = map->transitions();
-    if (!transitions->descriptors()->IsEmpty()) {
-      DescriptorArray* descriptors = transitions->descriptors();
-      TagObject(descriptors, "(map descriptors)");
-      SetInternalReference(transitions, entry,
-                           "descriptors", descriptors,
-                           TransitionArray::kDescriptorsOffset);
-      IndexedReferencesExtractor refs_extractor(
-          this, transitions, entry);
-      transitions->Iterate(&refs_extractor);
-    }
+
+    Object* back_pointer = transitions->back_pointer_storage();
+    TagObject(transitions->back_pointer_storage(), "(back pointer)");
+    SetInternalReference(transitions, entry,
+                         "backpointer", back_pointer,
+                         TransitionArray::kBackPointerStorageOffset);
+    IndexedReferencesExtractor transitions_refs(this, transitions, entry);
+    transitions->Iterate(&transitions_refs);
+
     TagObject(transitions, "(transition array)");
     SetInternalReference(map, entry,
                          "transitions", transitions,
                          Map::kTransitionsOrBackPointerOffset);
+  } else {
+    Object* back_pointer = map->GetBackPointer();
+    TagObject(back_pointer, "(back pointer)");
+    SetInternalReference(map, entry,
+                         "backpointer", back_pointer,
+                         Map::kTransitionsOrBackPointerOffset);
   }
+  DescriptorArray* descriptors = map->instance_descriptors();
+  TagObject(descriptors, "(map descriptors)");
+  SetInternalReference(map, entry,
+                       "descriptors", descriptors,
+                       Map::kDescriptorsOffset);
+
   SetInternalReference(map, entry,
                        "code_cache", map->code_cache(),
                        Map::kCodeCacheOffset);
@@ -2119,9 +2141,11 @@ void V8HeapExplorer::ExtractCodeReferences(int entry, Code* code) {
   SetInternalReference(code, entry,
                        "deoptimization_data", code->deoptimization_data(),
                        Code::kDeoptimizationDataOffset);
-  SetInternalReference(code, entry,
-                       "type_feedback_info", code->type_feedback_info(),
-                       Code::kTypeFeedbackInfoOffset);
+  if (code->kind() == Code::FUNCTION) {
+    SetInternalReference(code, entry,
+                         "type_feedback_info", code->type_feedback_info(),
+                         Code::kTypeFeedbackInfoOffset);
+  }
   SetInternalReference(code, entry,
                        "gc_metadata", code->gc_metadata(),
                        Code::kGCMetadataOffset);
@@ -2179,7 +2203,9 @@ void V8HeapExplorer::ExtractClosureReferences(JSObject* js_obj, int entry) {
 void V8HeapExplorer::ExtractPropertyReferences(JSObject* js_obj, int entry) {
   if (js_obj->HasFastProperties()) {
     DescriptorArray* descs = js_obj->map()->instance_descriptors();
+    int real_size = js_obj->map()->NumberOfOwnDescriptors();
     for (int i = 0; i < descs->number_of_descriptors(); i++) {
+      if (descs->GetDetails(i).descriptor_index() > real_size) continue;
       switch (descs->GetType(i)) {
         case FIELD: {
           int index = descs->GetFieldIndex(i);
@@ -2430,19 +2456,17 @@ bool V8HeapExplorer::IterateAndExtractReferences(
 
 
 bool V8HeapExplorer::IsEssentialObject(Object* object) {
-  // We have to use raw_unchecked_* versions because checked versions
-  // would fail during iteration over object properties.
   return object->IsHeapObject()
       && !object->IsOddball()
-      && object != heap_->raw_unchecked_empty_byte_array()
-      && object != heap_->raw_unchecked_empty_fixed_array()
-      && object != heap_->raw_unchecked_empty_descriptor_array()
-      && object != heap_->raw_unchecked_fixed_array_map()
-      && object != heap_->raw_unchecked_global_property_cell_map()
-      && object != heap_->raw_unchecked_shared_function_info_map()
-      && object != heap_->raw_unchecked_free_space_map()
-      && object != heap_->raw_unchecked_one_pointer_filler_map()
-      && object != heap_->raw_unchecked_two_pointer_filler_map();
+      && object != heap_->empty_byte_array()
+      && object != heap_->empty_fixed_array()
+      && object != heap_->empty_descriptor_array()
+      && object != heap_->fixed_array_map()
+      && object != heap_->global_property_cell_map()
+      && object != heap_->shared_function_info_map()
+      && object != heap_->free_space_map()
+      && object != heap_->one_pointer_filler_map()
+      && object != heap_->two_pointer_filler_map();
 }
 
 
@@ -2690,21 +2714,30 @@ void V8HeapExplorer::TagGlobalObjects() {
       isolate->factory()->NewStringFromAscii(CStrVector("URL"));
   const char** urls = NewArray<const char*>(enumerator.count());
   for (int i = 0, l = enumerator.count(); i < l; ++i) {
-    urls[i] = NULL;
-    HandleScope scope;
-    Handle<JSGlobalObject> global_obj = enumerator.at(i);
-    Object* obj_document;
-    if (global_obj->GetProperty(*document_string)->ToObject(&obj_document) &&
-        obj_document->IsJSObject()) {
-      // FixMe: Workaround: SharedWorker's current Isolate has NULL context.
-      // As result GetProperty(*url_string) will crash.
-      if (!Isolate::Current()->context() && obj_document->IsJSGlobalProxy())
-        continue;
-      JSObject* document = JSObject::cast(obj_document);
-      Object* obj_url;
-      if (document->GetProperty(*url_string)->ToObject(&obj_url) &&
-          obj_url->IsString()) {
-        urls[i] = collection_->names()->GetName(String::cast(obj_url));
+    if (global_object_name_resolver_) {
+      HandleScope scope;
+      Handle<JSGlobalObject> global_obj = enumerator.at(i);
+      urls[i] = global_object_name_resolver_->GetName(
+          Utils::ToLocal(Handle<JSObject>::cast(global_obj)));
+    } else {
+      // TODO(yurys): This branch is going to be removed once Chromium migrates
+      // to the new name resolver.
+      urls[i] = NULL;
+      HandleScope scope;
+      Handle<JSGlobalObject> global_obj = enumerator.at(i);
+      Object* obj_document;
+      if (global_obj->GetProperty(*document_string)->ToObject(&obj_document) &&
+          obj_document->IsJSObject()) {
+        // FixMe: Workaround: SharedWorker's current Isolate has NULL context.
+        // As result GetProperty(*url_string) will crash.
+        if (!Isolate::Current()->context() && obj_document->IsJSGlobalProxy())
+          continue;
+        JSObject* document = JSObject::cast(obj_document);
+        Object* obj_url;
+        if (document->GetProperty(*url_string)->ToObject(&obj_url) &&
+            obj_url->IsString()) {
+          urls[i] = collection_->names()->GetName(String::cast(obj_url));
+        }
       }
     }
   }
@@ -3059,11 +3092,13 @@ class SnapshotFiller : public SnapshotFillerInterface {
 };
 
 
-HeapSnapshotGenerator::HeapSnapshotGenerator(HeapSnapshot* snapshot,
-                                             v8::ActivityControl* control)
+HeapSnapshotGenerator::HeapSnapshotGenerator(
+    HeapSnapshot* snapshot,
+    v8::ActivityControl* control,
+    v8::HeapProfiler::ObjectNameResolver* resolver)
     : snapshot_(snapshot),
       control_(control),
-      v8_heap_explorer_(snapshot_, this),
+      v8_heap_explorer_(snapshot_, this, resolver),
       dom_explorer_(snapshot_, this) {
 }
 
@@ -3082,26 +3117,26 @@ bool HeapSnapshotGenerator::GenerateSnapshot() {
       Heap::kMakeHeapIterableMask,
       "HeapSnapshotGenerator::GenerateSnapshot");
 
-#ifdef DEBUG
+#ifdef VERIFY_HEAP
   Heap* debug_heap = Isolate::Current()->heap();
-  ASSERT(!debug_heap->old_data_space()->was_swept_conservatively());
-  ASSERT(!debug_heap->old_pointer_space()->was_swept_conservatively());
-  ASSERT(!debug_heap->code_space()->was_swept_conservatively());
-  ASSERT(!debug_heap->cell_space()->was_swept_conservatively());
-  ASSERT(!debug_heap->map_space()->was_swept_conservatively());
+  CHECK(!debug_heap->old_data_space()->was_swept_conservatively());
+  CHECK(!debug_heap->old_pointer_space()->was_swept_conservatively());
+  CHECK(!debug_heap->code_space()->was_swept_conservatively());
+  CHECK(!debug_heap->cell_space()->was_swept_conservatively());
+  CHECK(!debug_heap->map_space()->was_swept_conservatively());
 #endif
 
   // The following code uses heap iterators, so we want the heap to be
   // stable. It should follow TagGlobalObjects as that can allocate.
   AssertNoAllocation no_alloc;
 
-#ifdef DEBUG
+#ifdef VERIFY_HEAP
   debug_heap->Verify();
 #endif
 
   SetProgressTotal(1);  // 1 pass.
 
-#ifdef DEBUG
+#ifdef VERIFY_HEAP
   debug_heap->Verify();
 #endif
 
diff --git a/deps/v8/src/profile-generator.h b/deps/v8/src/profile-generator.h
index 04f4a1c71d..f306659aba 100644
--- a/deps/v8/src/profile-generator.h
+++ b/deps/v8/src/profile-generator.h
@@ -851,7 +851,8 @@ class SnapshottingProgressReportingInterface {
 class V8HeapExplorer : public HeapEntriesAllocator {
  public:
   V8HeapExplorer(HeapSnapshot* snapshot,
-                 SnapshottingProgressReportingInterface* progress);
+                 SnapshottingProgressReportingInterface* progress,
+                 v8::HeapProfiler::ObjectNameResolver* resolver);
   virtual ~V8HeapExplorer();
   virtual HeapEntry* AllocateEntry(HeapThing ptr);
   void AddRootEntries(SnapshotFillerInterface* filler);
@@ -945,6 +946,7 @@ class V8HeapExplorer : public HeapEntriesAllocator {
   SnapshotFillerInterface* filler_;
   HeapObjectsSet objects_tags_;
   HeapObjectsSet strong_gc_subroot_names_;
+  v8::HeapProfiler::ObjectNameResolver* global_object_name_resolver_;
 
   static HeapObject* const kGcRootsObject;
   static HeapObject* const kFirstGcSubrootObject;
@@ -1021,7 +1023,8 @@ class NativeObjectsExplorer {
 class HeapSnapshotGenerator : public SnapshottingProgressReportingInterface {
  public:
   HeapSnapshotGenerator(HeapSnapshot* snapshot,
-                        v8::ActivityControl* control);
+                        v8::ActivityControl* control,
+                        v8::HeapProfiler::ObjectNameResolver* resolver);
   bool GenerateSnapshot();
 
  private:
diff --git a/deps/v8/src/property-details.h b/deps/v8/src/property-details.h
index b8fbb3c92a..510e9852a9 100644
--- a/deps/v8/src/property-details.h
+++ b/deps/v8/src/property-details.h
@@ -38,6 +38,10 @@ enum PropertyAttributes {
   READ_ONLY         = v8::ReadOnly,
   DONT_ENUM         = v8::DontEnum,
   DONT_DELETE       = v8::DontDelete,
+
+  SEALED            = DONT_ENUM | DONT_DELETE,
+  FROZEN            = SEALED | READ_ONLY,
+
   ABSENT            = 16  // Used in runtime to indicate a property is absent.
   // ABSENT can never be stored in or returned from a descriptor's attributes
   // bitfield.  It is only used as a return value meaning the attributes of
@@ -96,7 +100,9 @@ class PropertyDetails BASE_EMBEDDED {
 
   PropertyType type() { return TypeField::decode(value_); }
 
-  PropertyAttributes attributes() { return AttributesField::decode(value_); }
+  PropertyAttributes attributes() const {
+    return AttributesField::decode(value_);
+  }
 
   int dictionary_index() {
     return DictionaryStorageField::decode(value_);
@@ -112,10 +118,10 @@ class PropertyDetails BASE_EMBEDDED {
     return DictionaryStorageField::is_valid(index);
   }
 
-  bool IsReadOnly() { return (attributes() & READ_ONLY) != 0; }
-  bool IsDontDelete() { return (attributes() & DONT_DELETE) != 0; }
-  bool IsDontEnum() { return (attributes() & DONT_ENUM) != 0; }
-  bool IsDeleted() { return DeletedField::decode(value_) != 0;}
+  bool IsReadOnly() const { return (attributes() & READ_ONLY) != 0; }
+  bool IsDontDelete() const { return (attributes() & DONT_DELETE) != 0; }
+  bool IsDontEnum() const { return (attributes() & DONT_ENUM) != 0; }
+  bool IsDeleted() const { return DeletedField::decode(value_) != 0;}
 
   // Bit fields in value_ (type, shift, size). Must be public so the
   // constants can be embedded in generated code.
diff --git a/deps/v8/src/property.cc b/deps/v8/src/property.cc
index 05342eea95..cbf2fc859d 100644
--- a/deps/v8/src/property.cc
+++ b/deps/v8/src/property.cc
@@ -63,7 +63,7 @@ void LookupResult::Print(FILE* out) {
       break;
     case FIELD:
       PrintF(out, " -type = field\n");
-      PrintF(out, " -index = %d", GetFieldIndex());
+      PrintF(out, " -index = %d", GetFieldIndex().field_index());
       PrintF(out, "\n");
       break;
     case CALLBACKS:
diff --git a/deps/v8/src/property.h b/deps/v8/src/property.h
index 6bf52a7019..c41c6dc816 100644
--- a/deps/v8/src/property.h
+++ b/deps/v8/src/property.h
@@ -68,7 +68,7 @@ class Descriptor BASE_EMBEDDED {
     details_ = PropertyDetails(details_.attributes(), details_.type(), index);
   }
 
-  void SetSortedKey(int index) { details_ = details_.set_pointer(index); }
+  void SetSortedKeyIndex(int index) { details_ = details_.set_pointer(index); }
 
  private:
   String* key_;
@@ -132,6 +132,44 @@ class CallbacksDescriptor:  public Descriptor {
 };
 
 
+// Holds a property index value distinguishing if it is a field index or an
+// index inside the object header.
+class PropertyIndex {
+ public:
+  static PropertyIndex NewFieldIndex(int index) {
+    return PropertyIndex(index, false);
+  }
+  static PropertyIndex NewHeaderIndex(int index) {
+    return PropertyIndex(index, true);
+  }
+
+  bool is_field_index() { return (index_ & kHeaderIndexBit) == 0; }
+  bool is_header_index() { return (index_ & kHeaderIndexBit) != 0; }
+
+  int field_index() {
+    ASSERT(is_field_index());
+    return value();
+  }
+  int header_index() {
+    ASSERT(is_header_index());
+    return value();
+  }
+
+ private:
+  static const int kHeaderIndexBit = 1 << 31;
+  static const int kIndexMask = ~kHeaderIndexBit;
+
+  int value() { return index_ & kIndexMask; }
+
+  PropertyIndex(int index, bool is_header_based)
+      : index_(index | (is_header_based ? kHeaderIndexBit : 0)) {
+    ASSERT(index <= kIndexMask);
+  }
+
+  int index_;
+};
+
+
 class LookupResult BASE_EMBEDDED {
  public:
   explicit LookupResult(Isolate* isolate)
@@ -278,7 +316,7 @@ class LookupResult BASE_EMBEDDED {
   Object* GetLazyValue() {
     switch (type()) {
       case FIELD:
-        return holder()->FastPropertyAt(GetFieldIndex());
+        return holder()->FastPropertyAt(GetFieldIndex().field_index());
       case NORMAL: {
         Object* value;
         value = holder()->property_dictionary()->ValueAt(GetDictionaryEntry());
@@ -290,7 +328,7 @@ class LookupResult BASE_EMBEDDED {
       case CONSTANT_FUNCTION:
         return GetConstantFunction();
       default:
-        return Smi::FromInt(0);
+        return Isolate::Current()->heap()->the_hole_value();
     }
   }
 
@@ -334,10 +372,11 @@ class LookupResult BASE_EMBEDDED {
     return number_;
   }
 
-  int GetFieldIndex() {
+  PropertyIndex GetFieldIndex() {
     ASSERT(lookup_type_ == DESCRIPTOR_TYPE);
     ASSERT(IsField());
-    return Descriptor::IndexFromValue(GetValue());
+    return PropertyIndex::NewFieldIndex(
+        Descriptor::IndexFromValue(GetValue()));
   }
 
   int GetLocalFieldIndexFromMap(Map* map) {
@@ -384,6 +423,7 @@ class LookupResult BASE_EMBEDDED {
 
   Object* GetValueFromMap(Map* map) const {
     ASSERT(lookup_type_ == DESCRIPTOR_TYPE);
+    ASSERT(number_ < map->NumberOfOwnDescriptors());
     return map->instance_descriptors()->GetValue(number_);
   }
 
diff --git a/deps/v8/src/proxy.js b/deps/v8/src/proxy.js
index 4e86c8892a..53a3572474 100644
--- a/deps/v8/src/proxy.js
+++ b/deps/v8/src/proxy.js
@@ -31,7 +31,7 @@ global.Proxy = new $Object();
 
 var $Proxy = global.Proxy
 
-$Proxy.create = function(handler, proto) {
+function ProxyCreate(handler, proto) {
   if (!IS_SPEC_OBJECT(handler))
     throw MakeTypeError("handler_non_object", ["create"])
   if (IS_UNDEFINED(proto))
@@ -41,7 +41,7 @@ $Proxy.create = function(handler, proto) {
   return %CreateJSProxy(handler, proto)
 }
 
-$Proxy.createFunction = function(handler, callTrap, constructTrap) {
+function ProxyCreateFunction(handler, callTrap, constructTrap) {
   if (!IS_SPEC_OBJECT(handler))
     throw MakeTypeError("handler_non_object", ["create"])
   if (!IS_SPEC_FUNCTION(callTrap))
@@ -62,6 +62,11 @@ $Proxy.createFunction = function(handler, callTrap, constructTrap) {
     handler, callTrap, constructTrap, $Function.prototype)
 }
 
+%CheckIsBootstrapping()
+InstallFunctions($Proxy, DONT_ENUM, [
+  "create", ProxyCreate,
+  "createFunction", ProxyCreateFunction
+])
 
 
 ////////////////////////////////////////////////////////////////////////////////
diff --git a/deps/v8/src/regexp-macro-assembler.cc b/deps/v8/src/regexp-macro-assembler.cc
index a4719b53fc..ee9347acbb 100644
--- a/deps/v8/src/regexp-macro-assembler.cc
+++ b/deps/v8/src/regexp-macro-assembler.cc
@@ -67,11 +67,7 @@ NativeRegExpMacroAssembler::~NativeRegExpMacroAssembler() {
 
 
 bool NativeRegExpMacroAssembler::CanReadUnaligned() {
-#ifdef V8_TARGET_CAN_READ_UNALIGNED
-  return !slow_safe();
-#else
-  return false;
-#endif
+  return FLAG_enable_unaligned_accesses && !slow_safe();
 }
 
 const byte* NativeRegExpMacroAssembler::StringCharacterPosition(
@@ -81,14 +77,14 @@ const byte* NativeRegExpMacroAssembler::StringCharacterPosition(
   ASSERT(subject->IsExternalString() || subject->IsSeqString());
   ASSERT(start_index >= 0);
   ASSERT(start_index <= subject->length());
-  if (subject->IsAsciiRepresentation()) {
+  if (subject->IsOneByteRepresentation()) {
     const byte* address;
     if (StringShape(subject).IsExternal()) {
       const char* data = ExternalAsciiString::cast(subject)->GetChars();
       address = reinterpret_cast<const byte*>(data);
     } else {
-      ASSERT(subject->IsSeqAsciiString());
-      char* data = SeqAsciiString::cast(subject)->GetChars();
+      ASSERT(subject->IsSeqOneByteString());
+      char* data = SeqOneByteString::cast(subject)->GetChars();
       address = reinterpret_cast<const byte*>(data);
     }
     return address + start_index;
@@ -137,7 +133,7 @@ NativeRegExpMacroAssembler::Result NativeRegExpMacroAssembler::Match(
     slice_offset = slice->offset();
   }
   // Ensure that an underlying string has the same ASCII-ness.
-  bool is_ascii = subject_ptr->IsAsciiRepresentation();
+  bool is_ascii = subject_ptr->IsOneByteRepresentation();
   ASSERT(subject_ptr->IsExternalString() || subject_ptr->IsSeqString());
   // String is now either Sequential or External
   int char_size_shift = is_ascii ? 0 : 1;
diff --git a/deps/v8/src/regexp-stack.cc b/deps/v8/src/regexp-stack.cc
index ff9547f3a7..325a1496c9 100644
--- a/deps/v8/src/regexp-stack.cc
+++ b/deps/v8/src/regexp-stack.cc
@@ -51,6 +51,7 @@ RegExpStack::RegExpStack()
 
 
 RegExpStack::~RegExpStack() {
+  thread_local_.Free();
 }
 
 
diff --git a/deps/v8/src/regexp.js b/deps/v8/src/regexp.js
index 38090397aa..da1883f3a4 100644
--- a/deps/v8/src/regexp.js
+++ b/deps/v8/src/regexp.js
@@ -140,18 +140,15 @@ function BuildResultFromMatchInfo(lastMatchInfo, s) {
   var j = REGEXP_FIRST_CAPTURE + 2;
   for (var i = 1; i < numResults; i++) {
     start = lastMatchInfo[j++];
-    end = lastMatchInfo[j++];
-    if (end != -1) {
+    if (start != -1) {
+      end = lastMatchInfo[j];
       if (start + 1 == end) {
         result[i] = %_StringCharAt(s, start);
       } else {
         result[i] = %_SubString(s, start, end);
       }
-    } else {
-      // Make sure the element is present. Avoid reading the undefined
-      // property from the global object since this may change.
-      result[i] = void 0;
     }
+    j++;
   }
   return result;
 }
@@ -164,6 +161,7 @@ function RegExpExecNoTests(regexp, string, start) {
     lastMatchInfoOverride = null;
     return BuildResultFromMatchInfo(matchInfo, string);
   }
+  regexp.lastIndex = 0;
   return null;
 }
 
@@ -196,7 +194,7 @@ function RegExpExec(string) {
   var matchIndices = %_RegExpExec(this, string, i, lastMatchInfo);
 
   if (matchIndices === null) {
-    if (global) this.lastIndex = 0;
+    this.lastIndex = 0;
     return null;
   }
 
@@ -259,7 +257,10 @@ function RegExpTest(string) {
     %_Log('regexp', 'regexp-exec,%0r,%1S,%2i', [regexp, string, lastIndex]);
     // matchIndices is either null or the lastMatchInfo array.
     var matchIndices = %_RegExpExec(regexp, string, 0, lastMatchInfo);
-    if (matchIndices === null) return false;
+    if (matchIndices === null) {
+      this.lastIndex = 0;
+      return false;
+    }
     lastMatchInfoOverride = null;
     return true;
   }
diff --git a/deps/v8/src/rewriter.cc b/deps/v8/src/rewriter.cc
index 6541546cb6..2a98787177 100644
--- a/deps/v8/src/rewriter.cc
+++ b/deps/v8/src/rewriter.cc
@@ -109,6 +109,13 @@ void Processor::VisitBlock(Block* node) {
 }
 
 
+void Processor::VisitModuleStatement(ModuleStatement* node) {
+  bool set_after_body = is_set_;
+  Visit(node->body());
+  is_set_ = is_set_ && set_after_body;
+}
+
+
 void Processor::VisitExpressionStatement(ExpressionStatement* node) {
   // Rewrite : <x>; -> .result = <x>;
   if (!is_set_ && !node->expression()->IsThrow()) {
@@ -257,7 +264,7 @@ bool Rewriter::Rewrite(CompilationInfo* info) {
       // coincides with the end of the with scope which is the position of '1'.
       int position = function->end_position();
       VariableProxy* result_proxy = processor.factory()->NewVariableProxy(
-          result->name(), false, Interface::NewValue(), position);
+          result->name(), false, result->interface(), position);
       result_proxy->BindTo(result);
       Statement* result_statement =
           processor.factory()->NewReturnStatement(result_proxy);
diff --git a/deps/v8/src/runtime-profiler.cc b/deps/v8/src/runtime-profiler.cc
index 23f41fa7d2..262cd1d582 100644
--- a/deps/v8/src/runtime-profiler.cc
+++ b/deps/v8/src/runtime-profiler.cc
@@ -140,6 +140,9 @@ static void GetICCounts(JSFunction* function,
 
 void RuntimeProfiler::Optimize(JSFunction* function, const char* reason) {
   ASSERT(function->IsOptimizable());
+  // If we are in manual mode, don't auto-optimize anything.
+  if (FLAG_manual_parallel_recompilation) return;
+
   if (FLAG_trace_opt) {
     PrintF("[marking ");
     function->PrintName();
@@ -193,16 +196,9 @@ void RuntimeProfiler::AttemptOnStackReplacement(JSFunction* function) {
 
   // Get the stack check stub code object to match against.  We aren't
   // prepared to generate it, but we don't expect to have to.
-  bool found_code = false;
   Code* stack_check_code = NULL;
-  if (FLAG_count_based_interrupts) {
-    InterruptStub interrupt_stub;
-    found_code = interrupt_stub.FindCodeInCache(&stack_check_code);
-  } else  // NOLINT
-  {  // NOLINT
-    StackCheckStub check_stub;
-    found_code = check_stub.FindCodeInCache(&stack_check_code);
-  }
+  InterruptStub interrupt_stub;
+  bool found_code = interrupt_stub.FindCodeInCache(&stack_check_code, isolate_);
   if (found_code) {
     Code* replacement_code =
         isolate_->builtins()->builtin(Builtins::kOnStackReplacement);
@@ -376,12 +372,6 @@ void RuntimeProfiler::OptimizeNow() {
 }
 
 
-void RuntimeProfiler::NotifyTick() {
-  if (FLAG_count_based_interrupts) return;
-  isolate_->stack_guard()->RequestRuntimeProfilerTick();
-}
-
-
 void RuntimeProfiler::SetUp() {
   ASSERT(has_been_globally_set_up_);
   if (!FLAG_watch_ic_patching) {
diff --git a/deps/v8/src/runtime-profiler.h b/deps/v8/src/runtime-profiler.h
index ab6cb378ea..507535f0b4 100644
--- a/deps/v8/src/runtime-profiler.h
+++ b/deps/v8/src/runtime-profiler.h
@@ -52,8 +52,6 @@ class RuntimeProfiler {
 
   void OptimizeNow();
 
-  void NotifyTick();
-
   void SetUp();
   void Reset();
   void TearDown();
diff --git a/deps/v8/src/runtime.cc b/deps/v8/src/runtime.cc
index 3c9a10dbff..446443148d 100644
--- a/deps/v8/src/runtime.cc
+++ b/deps/v8/src/runtime.cc
@@ -46,6 +46,7 @@
 #include "isolate-inl.h"
 #include "jsregexp.h"
 #include "json-parser.h"
+#include "json-stringifier.h"
 #include "liveedit.h"
 #include "liveobjectlist-inl.h"
 #include "misc-intrinsics.h"
@@ -782,6 +783,15 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_SetDelete) {
 }
 
 
+RUNTIME_FUNCTION(MaybeObject*, Runtime_SetGetSize) {
+  HandleScope scope(isolate);
+  ASSERT(args.length() == 1);
+  CONVERT_ARG_HANDLE_CHECKED(JSSet, holder, 0);
+  Handle<ObjectHashSet> table(ObjectHashSet::cast(holder->table()));
+  return Smi::FromInt(table->NumberOfElements());
+}
+
+
 RUNTIME_FUNCTION(MaybeObject*, Runtime_MapInitialize) {
   HandleScope scope(isolate);
   ASSERT(args.length() == 1);
@@ -841,6 +851,15 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_MapSet) {
 }
 
 
+RUNTIME_FUNCTION(MaybeObject*, Runtime_MapGetSize) {
+  HandleScope scope(isolate);
+  ASSERT(args.length() == 1);
+  CONVERT_ARG_HANDLE_CHECKED(JSMap, holder, 0);
+  Handle<ObjectHashTable> table(ObjectHashTable::cast(holder->table()));
+  return Smi::FromInt(table->NumberOfElements());
+}
+
+
 RUNTIME_FUNCTION(MaybeObject*, Runtime_WeakMapInitialize) {
   HandleScope scope(isolate);
   ASSERT(args.length() == 1);
@@ -948,104 +967,107 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_IsInPrototypeChain) {
 }
 
 
-// Recursively traverses hidden prototypes if property is not found
-static void GetOwnPropertyImplementation(JSObject* obj,
-                                         String* name,
-                                         LookupResult* result) {
-  obj->LocalLookupRealNamedProperty(name, result);
+static bool CheckAccessException(Object* callback,
+                                 v8::AccessType access_type) {
+  if (callback->IsAccessorInfo()) {
+    AccessorInfo* info = AccessorInfo::cast(callback);
+    return
+        (access_type == v8::ACCESS_HAS &&
+           (info->all_can_read() || info->all_can_write())) ||
+        (access_type == v8::ACCESS_GET && info->all_can_read()) ||
+        (access_type == v8::ACCESS_SET && info->all_can_write());
+  }
+  return false;
+}
 
-  if (result->IsFound()) return;
 
-  Object* proto = obj->GetPrototype();
-  if (proto->IsJSObject() &&
-    JSObject::cast(proto)->map()->is_hidden_prototype())
-    GetOwnPropertyImplementation(JSObject::cast(proto),
-                                 name, result);
+template<class Key>
+static bool CheckGenericAccess(
+    JSObject* receiver,
+    JSObject* holder,
+    Key key,
+    v8::AccessType access_type,
+    bool (Isolate::*mayAccess)(JSObject*, Key, v8::AccessType)) {
+  Isolate* isolate = receiver->GetIsolate();
+  for (JSObject* current = receiver;
+       true;
+       current = JSObject::cast(current->GetPrototype())) {
+    if (current->IsAccessCheckNeeded() &&
+        !(isolate->*mayAccess)(current, key, access_type)) {
+      return false;
+    }
+    if (current == holder) break;
+  }
+  return true;
 }
 
 
-static bool CheckAccessException(LookupResult* result,
-                                 v8::AccessType access_type) {
-  if (result->type() == CALLBACKS) {
-    Object* callback = result->GetCallbackObject();
-    if (callback->IsAccessorInfo()) {
-      AccessorInfo* info = AccessorInfo::cast(callback);
-      bool can_access =
-          (access_type == v8::ACCESS_HAS &&
-              (info->all_can_read() || info->all_can_write())) ||
-          (access_type == v8::ACCESS_GET && info->all_can_read()) ||
-          (access_type == v8::ACCESS_SET && info->all_can_write());
-      return can_access;
-    }
+enum AccessCheckResult {
+  ACCESS_FORBIDDEN,
+  ACCESS_ALLOWED,
+  ACCESS_ABSENT
+};
+
+
+static AccessCheckResult CheckElementAccess(
+    JSObject* obj,
+    uint32_t index,
+    v8::AccessType access_type) {
+  // TODO(1095): we should traverse hidden prototype hierachy as well.
+  if (CheckGenericAccess(
+          obj, obj, index, access_type, &Isolate::MayIndexedAccess)) {
+    return ACCESS_ALLOWED;
   }
 
-  return false;
+  obj->GetIsolate()->ReportFailedAccessCheck(obj, access_type);
+  return ACCESS_FORBIDDEN;
 }
 
 
-static bool CheckAccess(JSObject* obj,
-                        String* name,
-                        LookupResult* result,
-                        v8::AccessType access_type) {
-  ASSERT(result->IsProperty());
-
-  JSObject* holder = result->holder();
-  JSObject* current = obj;
-  Isolate* isolate = obj->GetIsolate();
-  while (true) {
-    if (current->IsAccessCheckNeeded() &&
-        !isolate->MayNamedAccess(current, name, access_type)) {
-      // Access check callback denied the access, but some properties
-      // can have a special permissions which override callbacks descision
-      // (currently see v8::AccessControl).
-      break;
-    }
+static AccessCheckResult CheckPropertyAccess(
+    JSObject* obj,
+    String* name,
+    v8::AccessType access_type) {
+  uint32_t index;
+  if (name->AsArrayIndex(&index)) {
+    return CheckElementAccess(obj, index, access_type);
+  }
 
-    if (current == holder) {
-      return true;
-    }
+  LookupResult lookup(obj->GetIsolate());
+  obj->LocalLookup(name, &lookup, true);
 
-    current = JSObject::cast(current->GetPrototype());
+  if (!lookup.IsProperty()) return ACCESS_ABSENT;
+  if (CheckGenericAccess<Object*>(
+          obj, lookup.holder(), name, access_type, &Isolate::MayNamedAccess)) {
+    return ACCESS_ALLOWED;
   }
 
+  // Access check callback denied the access, but some properties
+  // can have a special permissions which override callbacks descision
+  // (currently see v8::AccessControl).
   // API callbacks can have per callback access exceptions.
-  switch (result->type()) {
-    case CALLBACKS: {
-      if (CheckAccessException(result, access_type)) {
-        return true;
+  switch (lookup.type()) {
+    case CALLBACKS:
+      if (CheckAccessException(lookup.GetCallbackObject(), access_type)) {
+        return ACCESS_ALLOWED;
       }
       break;
-    }
-    case INTERCEPTOR: {
+    case INTERCEPTOR:
       // If the object has an interceptor, try real named properties.
       // Overwrite the result to fetch the correct property later.
-      holder->LookupRealNamedProperty(name, result);
-      if (result->IsProperty()) {
-        if (CheckAccessException(result, access_type)) {
-          return true;
+      lookup.holder()->LookupRealNamedProperty(name, &lookup);
+      if (lookup.IsProperty() && lookup.IsPropertyCallbacks()) {
+        if (CheckAccessException(lookup.GetCallbackObject(), access_type)) {
+          return ACCESS_ALLOWED;
         }
       }
       break;
-    }
     default:
       break;
   }
 
-  isolate->ReportFailedAccessCheck(current, access_type);
-  return false;
-}
-
-
-// TODO(1095): we should traverse hidden prototype hierachy as well.
-static bool CheckElementAccess(JSObject* obj,
-                               uint32_t index,
-                               v8::AccessType access_type) {
-  if (obj->IsAccessCheckNeeded() &&
-      !obj->GetIsolate()->MayIndexedAccess(obj, index, access_type)) {
-    return false;
-  }
-
-  return true;
+  obj->GetIsolate()->ReportFailedAccessCheck(obj, access_type);
+  return ACCESS_FORBIDDEN;
 }
 
 
@@ -1066,141 +1088,43 @@ static MaybeObject* GetOwnProperty(Isolate* isolate,
                                    Handle<JSObject> obj,
                                    Handle<String> name) {
   Heap* heap = isolate->heap();
-  Handle<FixedArray> elms = isolate->factory()->NewFixedArray(DESCRIPTOR_SIZE);
-  Handle<JSArray> desc = isolate->factory()->NewJSArrayWithElements(elms);
-  LookupResult result(isolate);
-  // This could be an element.
-  uint32_t index;
-  if (name->AsArrayIndex(&index)) {
-    switch (obj->HasLocalElement(index)) {
-      case JSObject::UNDEFINED_ELEMENT:
-        return heap->undefined_value();
-
-      case JSObject::STRING_CHARACTER_ELEMENT: {
-        // Special handling of string objects according to ECMAScript 5
-        // 15.5.5.2. Note that this might be a string object with elements
-        // other than the actual string value. This is covered by the
-        // subsequent cases.
-        Handle<JSValue> js_value = Handle<JSValue>::cast(obj);
-        Handle<String> str(String::cast(js_value->value()));
-        Handle<String> substr = SubString(str, index, index + 1, NOT_TENURED);
-
-        elms->set(IS_ACCESSOR_INDEX, heap->false_value());
-        elms->set(VALUE_INDEX, *substr);
-        elms->set(WRITABLE_INDEX, heap->false_value());
-        elms->set(ENUMERABLE_INDEX,  heap->true_value());
-        elms->set(CONFIGURABLE_INDEX, heap->false_value());
-        return *desc;
-      }
-
-      case JSObject::INTERCEPTED_ELEMENT:
-      case JSObject::FAST_ELEMENT: {
-        elms->set(IS_ACCESSOR_INDEX, heap->false_value());
-        Handle<Object> value = Object::GetElement(obj, index);
-        RETURN_IF_EMPTY_HANDLE(isolate, value);
-        elms->set(VALUE_INDEX, *value);
-        elms->set(WRITABLE_INDEX, heap->true_value());
-        elms->set(ENUMERABLE_INDEX,  heap->true_value());
-        elms->set(CONFIGURABLE_INDEX, heap->true_value());
-        return *desc;
-      }
-
-      case JSObject::DICTIONARY_ELEMENT: {
-        Handle<JSObject> holder = obj;
-        if (obj->IsJSGlobalProxy()) {
-          Object* proto = obj->GetPrototype();
-          if (proto->IsNull()) return heap->undefined_value();
-          ASSERT(proto->IsJSGlobalObject());
-          holder = Handle<JSObject>(JSObject::cast(proto));
-        }
-        FixedArray* elements = FixedArray::cast(holder->elements());
-        SeededNumberDictionary* dictionary = NULL;
-        if (elements->map() == heap->non_strict_arguments_elements_map()) {
-          dictionary = SeededNumberDictionary::cast(elements->get(1));
-        } else {
-          dictionary = SeededNumberDictionary::cast(elements);
-        }
-        int entry = dictionary->FindEntry(index);
-        ASSERT(entry != SeededNumberDictionary::kNotFound);
-        PropertyDetails details = dictionary->DetailsAt(entry);
-        switch (details.type()) {
-          case CALLBACKS: {
-            // This is an accessor property with getter and/or setter.
-            AccessorPair* accessors =
-                AccessorPair::cast(dictionary->ValueAt(entry));
-            elms->set(IS_ACCESSOR_INDEX, heap->true_value());
-            if (CheckElementAccess(*obj, index, v8::ACCESS_GET)) {
-              elms->set(GETTER_INDEX, accessors->GetComponent(ACCESSOR_GETTER));
-            }
-            if (CheckElementAccess(*obj, index, v8::ACCESS_SET)) {
-              elms->set(SETTER_INDEX, accessors->GetComponent(ACCESSOR_SETTER));
-            }
-            break;
-          }
-          case NORMAL: {
-            // This is a data property.
-            elms->set(IS_ACCESSOR_INDEX, heap->false_value());
-            Handle<Object> value = Object::GetElement(obj, index);
-            ASSERT(!value.is_null());
-            elms->set(VALUE_INDEX, *value);
-            elms->set(WRITABLE_INDEX, heap->ToBoolean(!details.IsReadOnly()));
-            break;
-          }
-          default:
-            UNREACHABLE();
-            break;
-        }
-        elms->set(ENUMERABLE_INDEX, heap->ToBoolean(!details.IsDontEnum()));
-        elms->set(CONFIGURABLE_INDEX, heap->ToBoolean(!details.IsDontDelete()));
-        return *desc;
-      }
-    }
-  }
-
-  // Use recursive implementation to also traverse hidden prototypes
-  GetOwnPropertyImplementation(*obj, *name, &result);
-
-  if (!result.IsProperty()) {
-    return heap->undefined_value();
-  }
-
-  if (!CheckAccess(*obj, *name, &result, v8::ACCESS_HAS)) {
-    return heap->false_value();
+  // Due to some WebKit tests, we want to make sure that we do not log
+  // more than one access failure here.
+  switch (CheckPropertyAccess(*obj, *name, v8::ACCESS_HAS)) {
+    case ACCESS_FORBIDDEN: return heap->false_value();
+    case ACCESS_ALLOWED: break;
+    case ACCESS_ABSENT: return heap->undefined_value();
   }
 
-  elms->set(ENUMERABLE_INDEX, heap->ToBoolean(!result.IsDontEnum()));
-  elms->set(CONFIGURABLE_INDEX, heap->ToBoolean(!result.IsDontDelete()));
-
-  bool is_js_accessor = result.IsPropertyCallbacks() &&
-                        (result.GetCallbackObject()->IsAccessorPair());
+  PropertyAttributes attrs = obj->GetLocalPropertyAttribute(*name);
+  if (attrs == ABSENT) return heap->undefined_value();
+  AccessorPair* accessors = obj->GetLocalPropertyAccessorPair(*name);
 
-  if (is_js_accessor) {
-    // __defineGetter__/__defineSetter__ callback.
-    elms->set(IS_ACCESSOR_INDEX, heap->true_value());
-
-    AccessorPair* accessors = AccessorPair::cast(result.GetCallbackObject());
+  Handle<FixedArray> elms = isolate->factory()->NewFixedArray(DESCRIPTOR_SIZE);
+  elms->set(ENUMERABLE_INDEX, heap->ToBoolean((attrs & DONT_ENUM) == 0));
+  elms->set(CONFIGURABLE_INDEX, heap->ToBoolean((attrs & DONT_DELETE) == 0));
+  elms->set(IS_ACCESSOR_INDEX, heap->ToBoolean(accessors != NULL));
+
+  if (accessors == NULL) {
+    elms->set(WRITABLE_INDEX, heap->ToBoolean((attrs & READ_ONLY) == 0));
+    // GetProperty does access check.
+    Handle<Object> value = GetProperty(obj, name);
+    if (value.is_null()) return Failure::Exception();
+    elms->set(VALUE_INDEX, *value);
+  } else {
+    // Access checks are performed for both accessors separately.
+    // When they fail, the respective field is not set in the descriptor.
     Object* getter = accessors->GetComponent(ACCESSOR_GETTER);
-    if (!getter->IsMap() && CheckAccess(*obj, *name, &result, v8::ACCESS_GET)) {
+    Object* setter = accessors->GetComponent(ACCESSOR_SETTER);
+    if (!getter->IsMap() && CheckPropertyAccess(*obj, *name, v8::ACCESS_GET)) {
       elms->set(GETTER_INDEX, getter);
     }
-    Object* setter = accessors->GetComponent(ACCESSOR_SETTER);
-    if (!setter->IsMap() && CheckAccess(*obj, *name, &result, v8::ACCESS_SET)) {
+    if (!setter->IsMap() && CheckPropertyAccess(*obj, *name, v8::ACCESS_SET)) {
       elms->set(SETTER_INDEX, setter);
     }
-  } else {
-    elms->set(IS_ACCESSOR_INDEX, heap->false_value());
-    elms->set(WRITABLE_INDEX, heap->ToBoolean(!result.IsReadOnly()));
-
-    PropertyAttributes attrs;
-    Object* value;
-    // GetProperty will check access and report any violations.
-    { MaybeObject* maybe_value = obj->GetProperty(*obj, &result, *name, &attrs);
-      if (!maybe_value->ToObject(&value)) return maybe_value;
-    }
-    elms->set(VALUE_INDEX, value);
   }
 
-  return *desc;
+  return *isolate->factory()->NewJSArrayWithElements(elms);
 }
 
 
@@ -1358,8 +1282,7 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_DeclareGlobals) {
     bool is_var = value->IsUndefined();
     bool is_const = value->IsTheHole();
     bool is_function = value->IsSharedFunctionInfo();
-    bool is_module = value->IsJSModule();
-    ASSERT(is_var + is_const + is_function + is_module == 1);
+    ASSERT(is_var + is_const + is_function == 1);
 
     if (is_var || is_const) {
       // Lookup the property in the global object, and don't set the
@@ -1367,13 +1290,7 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_DeclareGlobals) {
       // Do the lookup locally only, see ES5 erratum.
       LookupResult lookup(isolate);
       if (FLAG_es52_globals) {
-        Object* obj = *global;
-        do {
-          JSObject::cast(obj)->LocalLookup(*name, &lookup);
-          if (lookup.IsFound()) break;
-          obj = obj->GetPrototype();
-        } while (obj->IsJSObject() &&
-                 JSObject::cast(obj)->map()->is_hidden_prototype());
+        global->LocalLookup(*name, &lookup, true);
       } else {
         global->Lookup(*name, &lookup);
       }
@@ -1397,30 +1314,29 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_DeclareGlobals) {
     }
 
     LookupResult lookup(isolate);
-    global->LocalLookup(*name, &lookup);
+    global->LocalLookup(*name, &lookup, true);
 
     // Compute the property attributes. According to ECMA-262,
     // the property must be non-configurable except in eval.
     int attr = NONE;
     bool is_eval = DeclareGlobalsEvalFlag::decode(flags);
-    if (!is_eval || is_module) {
+    if (!is_eval) {
       attr |= DONT_DELETE;
     }
     bool is_native = DeclareGlobalsNativeFlag::decode(flags);
-    if (is_const || is_module || (is_native && is_function)) {
+    if (is_const || (is_native && is_function)) {
       attr |= READ_ONLY;
     }
 
     LanguageMode language_mode = DeclareGlobalsLanguageMode::decode(flags);
 
-    if (!lookup.IsFound() || is_function || is_module) {
+    if (!lookup.IsFound() || is_function) {
       // If the local property exists, check that we can reconfigure it
       // as required for function declarations.
       if (lookup.IsFound() && lookup.IsDontDelete()) {
         if (lookup.IsReadOnly() || lookup.IsDontEnum() ||
             lookup.IsPropertyCallbacks()) {
-          return ThrowRedeclarationError(
-              isolate, is_function ? "function" : "module", name);
+          return ThrowRedeclarationError(isolate, "function", name);
         }
         // If the existing property is not configurable, keep its attributes.
         attr = lookup.GetAttributes();
@@ -1576,27 +1492,20 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_InitializeVarGlobal) {
   // the whole chain of hidden prototypes to do a 'local' lookup.
   Object* object = global;
   LookupResult lookup(isolate);
-  while (object->IsJSObject() &&
-         JSObject::cast(object)->map()->is_hidden_prototype()) {
-    JSObject* raw_holder = JSObject::cast(object);
-    raw_holder->LocalLookup(*name, &lookup);
-    if (lookup.IsInterceptor()) {
-      HandleScope handle_scope(isolate);
-      Handle<JSObject> holder(raw_holder);
-      PropertyAttributes intercepted = holder->GetPropertyAttribute(*name);
-      // Update the raw pointer in case it's changed due to GC.
-      raw_holder = *holder;
-      if (intercepted != ABSENT && (intercepted & READ_ONLY) == 0) {
-        // Found an interceptor that's not read only.
-        if (assign) {
-          return raw_holder->SetProperty(
-              &lookup, *name, args[2], attributes, strict_mode_flag);
-        } else {
-          return isolate->heap()->undefined_value();
-        }
+  JSObject::cast(object)->LocalLookup(*name, &lookup, true);
+  if (lookup.IsInterceptor()) {
+    HandleScope handle_scope(isolate);
+    PropertyAttributes intercepted =
+        lookup.holder()->GetPropertyAttribute(*name);
+    if (intercepted != ABSENT && (intercepted & READ_ONLY) == 0) {
+      // Found an interceptor that's not read only.
+      if (assign) {
+        return lookup.holder()->SetProperty(
+            &lookup, *name, args[2], attributes, strict_mode_flag);
+      } else {
+        return isolate->heap()->undefined_value();
       }
     }
-    object = raw_holder->GetPrototype();
   }
 
   // Reload global in case the loop above performed a GC.
@@ -1660,7 +1569,7 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_InitializeConstGlobal) {
   // Strict mode handling not needed (const is disallowed in strict mode).
   if (lookup.IsField()) {
     FixedArray* properties = global->properties();
-    int index = lookup.GetFieldIndex();
+    int index = lookup.GetFieldIndex().field_index();
     if (properties->get(index)->IsTheHole() || !lookup.IsReadOnly()) {
       properties->set(index, *value);
     }
@@ -1750,7 +1659,7 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_InitializeConstContextSlot) {
 
     if (lookup.IsField()) {
       FixedArray* properties = object->properties();
-      int index = lookup.GetFieldIndex();
+      int index = lookup.GetFieldIndex().field_index();
       if (properties->get(index)->IsTheHole()) {
         properties->set(index, *value);
       }
@@ -1881,9 +1790,7 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_RegExpInitializeObject) {
         JSRegExp::kIgnoreCaseFieldIndex, ignoreCase, SKIP_WRITE_BARRIER);
     regexp->InObjectPropertyAtPut(
         JSRegExp::kMultilineFieldIndex, multiline, SKIP_WRITE_BARRIER);
-    regexp->InObjectPropertyAtPut(JSRegExp::kLastIndexFieldIndex,
-                                  Smi::FromInt(0),
-                                  SKIP_WRITE_BARRIER);  // It's a Smi.
+    regexp->ResetLastIndex();
     return regexp;
   }
 
@@ -2166,7 +2073,7 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_FunctionSetReadOnlyPrototype) {
     // Construct a new field descriptor with updated attributes.
     DescriptorArray* instance_desc = function->map()->instance_descriptors();
 
-    int index = instance_desc->SearchWithCache(name);
+    int index = instance_desc->SearchWithCache(name, function->map());
     ASSERT(index != DescriptorArray::kNotFound);
     PropertyDetails details = instance_desc->GetDetails(index);
 
@@ -2179,7 +2086,7 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_FunctionSetReadOnlyPrototype) {
     Map* new_map;
     MaybeObject* maybe_map =
         function->map()->CopyReplaceDescriptor(
-            &new_desc, index, OMIT_TRANSITION);
+            instance_desc, &new_desc, index, OMIT_TRANSITION);
     if (!maybe_map->To(&new_map)) return maybe_map;
 
     function->set_map(new_map);
@@ -2254,6 +2161,7 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_SetCode) {
 
   // Set the code of the target function.
   target->ReplaceCode(source_shared->code());
+  ASSERT(target->next_function_link()->IsUndefined());
 
   // Make sure we get a fresh copy of the literal vector to avoid cross
   // context contamination.
@@ -2267,7 +2175,6 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_SetCode) {
   }
   target->set_context(*context);
   target->set_literals(*literals);
-  target->set_next_function_link(isolate->heap()->undefined_value());
 
   if (isolate->logger()->is_logging_code_events() ||
       CpuProfiler::is_profiling(isolate)) {
@@ -2442,7 +2349,7 @@ class ReplacementStringBuilder {
         array_builder_(heap->isolate(), estimated_part_count),
         subject_(subject),
         character_count_(0),
-        is_ascii_(subject->IsAsciiRepresentation()) {
+        is_ascii_(subject->IsOneByteRepresentation()) {
     // Require a non-zero initial size. Ensures that doubling the size to
     // extend the array will work.
     ASSERT(estimated_part_count > 0);
@@ -2482,7 +2389,7 @@ class ReplacementStringBuilder {
     int length = string->length();
     ASSERT(length > 0);
     AddElement(*string);
-    if (!string->IsAsciiRepresentation()) {
+    if (!string->IsOneByteRepresentation()) {
       is_ascii_ = false;
     }
     IncrementCharacterCount(length);
@@ -2496,7 +2403,7 @@ class ReplacementStringBuilder {
 
     Handle<String> joined_string;
     if (is_ascii_) {
-      Handle<SeqAsciiString> seq = NewRawAsciiString(character_count_);
+      Handle<SeqOneByteString> seq = NewRawOneByteString(character_count_);
       AssertNoAllocation no_alloc;
       char* char_buffer = seq->GetChars();
       StringBuilderConcatHelper(*subject_,
@@ -2527,8 +2434,8 @@ class ReplacementStringBuilder {
   }
 
  private:
-  Handle<SeqAsciiString> NewRawAsciiString(int length) {
-    return heap_->isolate()->factory()->NewRawAsciiString(length);
+  Handle<SeqOneByteString> NewRawOneByteString(int length) {
+    return heap_->isolate()->factory()->NewRawOneByteString(length);
   }
 
 
@@ -2853,6 +2760,23 @@ void FindAsciiStringIndices(Vector<const char> subject,
 }
 
 
+void FindTwoByteStringIndices(const Vector<const uc16> subject,
+                              uc16 pattern,
+                              ZoneList<int>* indices,
+                              unsigned int limit,
+                              Zone* zone) {
+  ASSERT(limit > 0);
+  const uc16* subject_start = subject.start();
+  const uc16* subject_end = subject_start + subject.length();
+  for (const uc16* pos = subject_start; pos < subject_end && limit > 0; pos++) {
+    if (*pos == pattern) {
+      indices->Add(static_cast<int>(pos - subject_start), zone);
+      limit--;
+    }
+  }
+}
+
+
 template <typename SubjectChar, typename PatternChar>
 void FindStringIndices(Isolate* isolate,
                        Vector<const SubjectChar> subject,
@@ -2917,19 +2841,37 @@ void FindStringIndicesDispatch(Isolate* isolate,
     } else {
       Vector<const uc16> subject_vector = subject_content.ToUC16Vector();
       if (pattern_content.IsAscii()) {
-        FindStringIndices(isolate,
-                          subject_vector,
-                          pattern_content.ToAsciiVector(),
-                          indices,
-                          limit,
-                          zone);
+        Vector<const char> pattern_vector = pattern_content.ToAsciiVector();
+        if (pattern_vector.length() == 1) {
+          FindTwoByteStringIndices(subject_vector,
+                                   pattern_vector[0],
+                                   indices,
+                                   limit,
+                                   zone);
+        } else {
+          FindStringIndices(isolate,
+                            subject_vector,
+                            pattern_vector,
+                            indices,
+                            limit,
+                            zone);
+        }
       } else {
-        FindStringIndices(isolate,
-                          subject_vector,
-                          pattern_content.ToUC16Vector(),
-                          indices,
-                          limit,
-                          zone);
+        Vector<const uc16> pattern_vector = pattern_content.ToUC16Vector();
+        if (pattern_vector.length() == 1) {
+          FindTwoByteStringIndices(subject_vector,
+                                   pattern_vector[0],
+                                   indices,
+                                   limit,
+                                   zone);
+        } else {
+          FindStringIndices(isolate,
+                            subject_vector,
+                            pattern_vector,
+                            indices,
+                            limit,
+                            zone);
+        }
       }
     }
   }
@@ -2960,7 +2902,10 @@ MUST_USE_RESULT static MaybeObject* StringReplaceAtomRegExpWithString(
       isolate, *subject, pattern, &indices, 0xffffffff, zone);
 
   int matches = indices.length();
-  if (matches == 0) return *subject;
+  if (matches == 0) {
+    pattern_regexp->ResetLastIndex();
+    return *subject;
+  }
 
   // Detect integer overflow.
   int64_t result_len_64 =
@@ -2977,7 +2922,7 @@ MUST_USE_RESULT static MaybeObject* StringReplaceAtomRegExpWithString(
   Handle<ResultSeqString> result;
   if (ResultSeqString::kHasAsciiEncoding) {
     result = Handle<ResultSeqString>::cast(
-        isolate->factory()->NewRawAsciiString(result_len));
+        isolate->factory()->NewRawOneByteString(result_len));
   } else {
     result = Handle<ResultSeqString>::cast(
         isolate->factory()->NewRawTwoByteString(result_len));
@@ -3046,7 +2991,7 @@ MUST_USE_RESULT static MaybeObject* StringReplaceRegExpWithString(
       regexp->TypeTag() == JSRegExp::ATOM &&
       simple_replace) {
     if (subject->HasOnlyAsciiChars() && replacement->HasOnlyAsciiChars()) {
-      return StringReplaceAtomRegExpWithString<SeqAsciiString>(
+      return StringReplaceAtomRegExpWithString<SeqOneByteString>(
           isolate, subject, regexp, replacement, last_match_info);
     } else {
       return StringReplaceAtomRegExpWithString<SeqTwoByteString>(
@@ -3060,6 +3005,7 @@ MUST_USE_RESULT static MaybeObject* StringReplaceRegExpWithString(
   int32_t* current_match = global_cache.FetchNext();
   if (current_match == NULL) {
     if (global_cache.HasException()) return Failure::Exception();
+    regexp->ResetLastIndex();
     return *subject;
   }
 
@@ -3134,9 +3080,9 @@ MUST_USE_RESULT static MaybeObject* StringReplaceRegExpWithEmptyString(
   // Shortcut for simple non-regexp global replacements
   if (is_global &&
       regexp->TypeTag() == JSRegExp::ATOM) {
-    Handle<String> empty_string(HEAP->empty_string());
+    Handle<String> empty_string = isolate->factory()->empty_string();
     if (subject->HasOnlyAsciiChars()) {
-      return StringReplaceAtomRegExpWithString<SeqAsciiString>(
+      return StringReplaceAtomRegExpWithString<SeqOneByteString>(
           isolate,
           subject,
           regexp,
@@ -3158,6 +3104,7 @@ MUST_USE_RESULT static MaybeObject* StringReplaceRegExpWithEmptyString(
   int32_t* current_match = global_cache.FetchNext();
   if (current_match == NULL) {
     if (global_cache.HasException()) return Failure::Exception();
+    regexp->ResetLastIndex();
     return *subject;
   }
 
@@ -3172,7 +3119,7 @@ MUST_USE_RESULT static MaybeObject* StringReplaceRegExpWithEmptyString(
   Handle<ResultSeqString> answer;
   if (ResultSeqString::kHasAsciiEncoding) {
     answer = Handle<ResultSeqString>::cast(
-        isolate->factory()->NewRawAsciiString(new_length));
+        isolate->factory()->NewRawOneByteString(new_length));
   } else {
     answer = Handle<ResultSeqString>::cast(
         isolate->factory()->NewRawTwoByteString(new_length));
@@ -3264,7 +3211,7 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_StringReplaceRegExpWithString) {
 
   if (replacement->length() == 0) {
     if (subject->HasOnlyAsciiChars()) {
-      return StringReplaceRegExpWithEmptyString<SeqAsciiString>(
+      return StringReplaceRegExpWithEmptyString<SeqOneByteString>(
           isolate, subject, regexp, last_match_info);
     } else {
       return StringReplaceRegExpWithEmptyString<SeqTwoByteString>(
@@ -3849,7 +3796,7 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_NumberToRadixString) {
   }
   char* str = DoubleToRadixCString(value, radix);
   MaybeObject* result =
-      isolate->heap()->AllocateStringFromAscii(CStrVector(str));
+      isolate->heap()->AllocateStringFromOneByte(CStrVector(str));
   DeleteArray(str);
   return result;
 }
@@ -3860,21 +3807,12 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_NumberToFixed) {
   ASSERT(args.length() == 2);
 
   CONVERT_DOUBLE_ARG_CHECKED(value, 0);
-  if (isnan(value)) {
-    return *isolate->factory()->nan_symbol();
-  }
-  if (isinf(value)) {
-    if (value < 0) {
-      return *isolate->factory()->minus_infinity_symbol();
-    }
-    return *isolate->factory()->infinity_symbol();
-  }
   CONVERT_DOUBLE_ARG_CHECKED(f_number, 1);
   int f = FastD2IChecked(f_number);
   RUNTIME_ASSERT(f >= 0);
   char* str = DoubleToFixedCString(value, f);
   MaybeObject* res =
-      isolate->heap()->AllocateStringFromAscii(CStrVector(str));
+      isolate->heap()->AllocateStringFromOneByte(CStrVector(str));
   DeleteArray(str);
   return res;
 }
@@ -3885,21 +3823,12 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_NumberToExponential) {
   ASSERT(args.length() == 2);
 
   CONVERT_DOUBLE_ARG_CHECKED(value, 0);
-  if (isnan(value)) {
-    return *isolate->factory()->nan_symbol();
-  }
-  if (isinf(value)) {
-    if (value < 0) {
-      return *isolate->factory()->minus_infinity_symbol();
-    }
-    return *isolate->factory()->infinity_symbol();
-  }
   CONVERT_DOUBLE_ARG_CHECKED(f_number, 1);
   int f = FastD2IChecked(f_number);
   RUNTIME_ASSERT(f >= -1 && f <= 20);
   char* str = DoubleToExponentialCString(value, f);
   MaybeObject* res =
-      isolate->heap()->AllocateStringFromAscii(CStrVector(str));
+      isolate->heap()->AllocateStringFromOneByte(CStrVector(str));
   DeleteArray(str);
   return res;
 }
@@ -3910,21 +3839,12 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_NumberToPrecision) {
   ASSERT(args.length() == 2);
 
   CONVERT_DOUBLE_ARG_CHECKED(value, 0);
-  if (isnan(value)) {
-    return *isolate->factory()->nan_symbol();
-  }
-  if (isinf(value)) {
-    if (value < 0) {
-      return *isolate->factory()->minus_infinity_symbol();
-    }
-    return *isolate->factory()->infinity_symbol();
-  }
   CONVERT_DOUBLE_ARG_CHECKED(f_number, 1);
   int f = FastD2IChecked(f_number);
   RUNTIME_ASSERT(f >= 1 && f <= 21);
   char* str = DoubleToPrecisionCString(value, f);
   MaybeObject* res =
-      isolate->heap()->AllocateStringFromAscii(CStrVector(str));
+      isolate->heap()->AllocateStringFromOneByte(CStrVector(str));
   DeleteArray(str);
   return res;
 }
@@ -4057,7 +3977,7 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_KeyedGetProperty) {
         LookupResult result(isolate);
         receiver->LocalLookup(key, &result);
         if (result.IsField()) {
-          int offset = result.GetFieldIndex();
+          int offset = result.GetFieldIndex().field_index();
           keyed_lookup_cache->Update(receiver_map, key, offset);
           return receiver->FastPropertyAt(offset);
         }
@@ -4083,8 +4003,7 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_KeyedGetProperty) {
       // become FAST_DOUBLE_ELEMENTS.
       Handle<JSObject> js_object(args.at<JSObject>(0));
       ElementsKind elements_kind = js_object->GetElementsKind();
-      if (IsFastElementsKind(elements_kind) &&
-          !IsFastObjectElementsKind(elements_kind)) {
+      if (IsFastDoubleElementsKind(elements_kind)) {
         FixedArrayBase* elements = js_object->elements();
         if (args.at<Smi>(1)->value() >= elements->length()) {
           if (IsFastHoleyElementsKind(elements_kind)) {
@@ -4097,6 +4016,9 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_KeyedGetProperty) {
                                                          isolate);
           if (maybe_object->IsFailure()) return maybe_object;
         }
+      } else {
+        ASSERT(IsFastSmiOrObjectElementsKind(elements_kind) ||
+               !IsFastElementsKind(elements_kind));
       }
     }
   } else if (args[0]->IsString() && args[1]->IsSmi()) {
@@ -4219,6 +4141,34 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_DefineOrRedefineDataProperty) {
 }
 
 
+// Return property without being observable by accessors or interceptors.
+RUNTIME_FUNCTION(MaybeObject*, Runtime_GetDataProperty) {
+  ASSERT(args.length() == 2);
+  CONVERT_ARG_HANDLE_CHECKED(JSObject, object, 0);
+  CONVERT_ARG_HANDLE_CHECKED(String, key, 1);
+  LookupResult lookup(isolate);
+  object->LookupRealNamedProperty(*key, &lookup);
+  if (!lookup.IsFound()) return isolate->heap()->undefined_value();
+  switch (lookup.type()) {
+    case NORMAL:
+      return lookup.holder()->GetNormalizedProperty(&lookup);
+    case FIELD:
+      return lookup.holder()->FastPropertyAt(
+          lookup.GetFieldIndex().field_index());
+    case CONSTANT_FUNCTION:
+      return lookup.GetConstantFunction();
+    case CALLBACKS:
+    case HANDLER:
+    case INTERCEPTOR:
+    case TRANSITION:
+      return isolate->heap()->undefined_value();
+    case NONEXISTENT:
+      UNREACHABLE();
+  }
+  return isolate->heap()->undefined_value();
+}
+
+
 MaybeObject* Runtime::SetObjectProperty(Isolate* isolate,
                                         Handle<Object> object,
                                         Handle<Object> key,
@@ -4678,41 +4628,6 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_IsPropertyEnumerable) {
   CONVERT_ARG_CHECKED(JSObject, object, 0);
   CONVERT_ARG_CHECKED(String, key, 1);
 
-  uint32_t index;
-  if (key->AsArrayIndex(&index)) {
-    JSObject::LocalElementType type = object->HasLocalElement(index);
-    switch (type) {
-      case JSObject::UNDEFINED_ELEMENT:
-      case JSObject::STRING_CHARACTER_ELEMENT:
-        return isolate->heap()->false_value();
-      case JSObject::INTERCEPTED_ELEMENT:
-      case JSObject::FAST_ELEMENT:
-        return isolate->heap()->true_value();
-      case JSObject::DICTIONARY_ELEMENT: {
-        if (object->IsJSGlobalProxy()) {
-          Object* proto = object->GetPrototype();
-          if (proto->IsNull()) {
-            return isolate->heap()->false_value();
-          }
-          ASSERT(proto->IsJSGlobalObject());
-          object = JSObject::cast(proto);
-        }
-        FixedArray* elements = FixedArray::cast(object->elements());
-        SeededNumberDictionary* dictionary = NULL;
-        if (elements->map() ==
-            isolate->heap()->non_strict_arguments_elements_map()) {
-          dictionary = SeededNumberDictionary::cast(elements->get(1));
-        } else {
-          dictionary = SeededNumberDictionary::cast(elements);
-        }
-        int entry = dictionary->FindEntry(index);
-        ASSERT(entry != SeededNumberDictionary::kNotFound);
-        PropertyDetails details = dictionary->DetailsAt(entry);
-        return isolate->heap()->ToBoolean(!details.IsDontEnum());
-      }
-    }
-  }
-
   PropertyAttributes att = object->GetLocalPropertyAttribute(key);
   return isolate->heap()->ToBoolean(att != ABSENT && (att & DONT_ENUM) == 0);
 }
@@ -5032,15 +4947,6 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_ToFastProperties) {
 }
 
 
-RUNTIME_FUNCTION(MaybeObject*, Runtime_ToSlowProperties) {
-  ASSERT(args.length() == 1);
-  Object* obj = args[0];
-  return (obj->IsJSObject() && !obj->IsJSGlobalProxy())
-      ? JSObject::cast(obj)->NormalizeProperties(CLEAR_INOBJECT_PROPERTIES, 0)
-      : obj;
-}
-
-
 RUNTIME_FUNCTION(MaybeObject*, Runtime_ToBool) {
   NoHandleAllocation ha;
   ASSERT(args.length() == 1);
@@ -5121,10 +5027,10 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_StringToNumber) {
 
   // Fast case: short integer or some sorts of junk values.
   int len = subject->length();
-  if (subject->IsSeqAsciiString()) {
+  if (subject->IsSeqOneByteString()) {
     if (len == 0) return Smi::FromInt(0);
 
-    char const* data = SeqAsciiString::cast(subject)->GetChars();
+    char const* data = SeqOneByteString::cast(subject)->GetChars();
     bool minus = (data[0] == '-');
     int start_pos = (minus ? 1 : 0);
 
@@ -5168,46 +5074,22 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_StringToNumber) {
 }
 
 
-RUNTIME_FUNCTION(MaybeObject*, Runtime_StringFromCharCodeArray) {
-  NoHandleAllocation ha;
-  ASSERT(args.length() == 1);
-
-  CONVERT_ARG_CHECKED(JSArray, codes, 0);
-  int length = Smi::cast(codes->length())->value();
-
-  // Check if the string can be ASCII.
-  int i;
-  for (i = 0; i < length; i++) {
-    Object* element;
-    { MaybeObject* maybe_element = codes->GetElement(i);
-      // We probably can't get an exception here, but just in order to enforce
-      // the checking of inputs in the runtime calls we check here.
-      if (!maybe_element->ToObject(&element)) return maybe_element;
-    }
-    CONVERT_NUMBER_CHECKED(int, chr, Int32, element);
-    if ((chr & 0xffff) > String::kMaxAsciiCharCode)
-      break;
+RUNTIME_FUNCTION(MaybeObject*, Runtime_NewString) {
+  CONVERT_SMI_ARG_CHECKED(length, 0);
+  CONVERT_BOOLEAN_ARG_CHECKED(is_one_byte, 1);
+  if (length == 0) return isolate->heap()->empty_string();
+  if (is_one_byte) {
+    return isolate->heap()->AllocateRawOneByteString(length);
+  } else {
+    return isolate->heap()->AllocateRawTwoByteString(length);
   }
+}
 
-  MaybeObject* maybe_object = NULL;
-  if (i == length) {  // The string is ASCII.
-    maybe_object = isolate->heap()->AllocateRawAsciiString(length);
-  } else {  // The string is not ASCII.
-    maybe_object = isolate->heap()->AllocateRawTwoByteString(length);
-  }
 
-  Object* object = NULL;
-  if (!maybe_object->ToObject(&object)) return maybe_object;
-  String* result = String::cast(object);
-  for (int i = 0; i < length; i++) {
-    Object* element;
-    { MaybeObject* maybe_element = codes->GetElement(i);
-      if (!maybe_element->ToObject(&element)) return maybe_element;
-    }
-    CONVERT_NUMBER_CHECKED(int, chr, Int32, element);
-    result->Set(i, chr & 0xffff);
-  }
-  return result;
+RUNTIME_FUNCTION(MaybeObject*, Runtime_TruncateString) {
+  CONVERT_ARG_CHECKED(SeqString, string, 0);
+  CONVERT_SMI_ARG_CHECKED(new_length, 1);
+  return string->Truncate(new_length);
 }
 
 
@@ -5285,7 +5167,7 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_URIEscape) {
   }
   Object* o;
   { MaybeObject* maybe_o =
-        isolate->heap()->AllocateRawAsciiString(escaped_length);
+        isolate->heap()->AllocateRawOneByteString(escaped_length);
     if (!maybe_o->ToObject(&o)) return maybe_o;
   }
   String* destination = String::cast(o);
@@ -5393,7 +5275,7 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_URIUnescape) {
   Object* o;
   { MaybeObject* maybe_o =
         ascii ?
-        isolate->heap()->AllocateRawAsciiString(unescaped_length) :
+        isolate->heap()->AllocateRawOneByteString(unescaped_length) :
         isolate->heap()->AllocateRawTwoByteString(unescaped_length);
     if (!maybe_o->ToObject(&o)) return maybe_o;
   }
@@ -5491,8 +5373,8 @@ MaybeObject* AllocateRawString<SeqTwoByteString>(Isolate* isolate, int length) {
 
 
 template <>
-MaybeObject* AllocateRawString<SeqAsciiString>(Isolate* isolate, int length) {
-  return isolate->heap()->AllocateRawAsciiString(length);
+MaybeObject* AllocateRawString<SeqOneByteString>(Isolate* isolate, int length) {
+  return isolate->heap()->AllocateRawOneByteString(length);
 }
 
 
@@ -5643,7 +5525,7 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_QuoteJSONString) {
     return QuoteJsonString<uc16, SeqTwoByteString, false>(isolate,
                                                           flat.ToUC16Vector());
   } else {
-    return QuoteJsonString<char, SeqAsciiString, false>(isolate,
+    return QuoteJsonString<char, SeqOneByteString, false>(isolate,
                                                         flat.ToAsciiVector());
   }
 }
@@ -5666,7 +5548,7 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_QuoteJSONStringComma) {
     return QuoteJsonString<uc16, SeqTwoByteString, true>(isolate,
                                                          flat.ToUC16Vector());
   } else {
-    return QuoteJsonString<char, SeqAsciiString, true>(isolate,
+    return QuoteJsonString<char, SeqOneByteString, true>(isolate,
                                                        flat.ToAsciiVector());
   }
 }
@@ -5758,7 +5640,7 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_QuoteJSONStringArray) {
   }
 
   if (ascii) {
-    return QuoteJsonStringArray<char, SeqAsciiString>(isolate,
+    return QuoteJsonStringArray<char, SeqOneByteString>(isolate,
                                                       elements,
                                                       worst_case_length);
   } else {
@@ -5769,6 +5651,14 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_QuoteJSONStringArray) {
 }
 
 
+RUNTIME_FUNCTION(MaybeObject*, Runtime_BasicJSONStringify) {
+  ASSERT(args.length() == 1);
+  HandleScope scope(isolate);
+  BasicJsonStringifier stringifier(isolate);
+  return stringifier.Stringify(Handle<Object>(args[0]));
+}
+
+
 RUNTIME_FUNCTION(MaybeObject*, Runtime_StringParseInt) {
   NoHandleAllocation ha;
 
@@ -5815,8 +5705,8 @@ MUST_USE_RESULT static MaybeObject* ConvertCaseHelper(
   // might break in the future if we implement more context and locale
   // dependent upper/lower conversions.
   Object* o;
-  { MaybeObject* maybe_o = s->IsAsciiRepresentation()
-        ? isolate->heap()->AllocateRawAsciiString(length)
+  { MaybeObject* maybe_o = s->IsOneByteRepresentation()
+        ? isolate->heap()->AllocateRawOneByteString(length)
         : isolate->heap()->AllocateRawTwoByteString(length);
     if (!maybe_o->ToObject(&o)) return maybe_o;
   }
@@ -6047,14 +5937,14 @@ MUST_USE_RESULT static MaybeObject* ConvertCase(
   // character is also ASCII.  This is currently the case, but it
   // might break in the future if we implement more context and locale
   // dependent upper/lower conversions.
-  if (s->IsSeqAsciiString()) {
+  if (s->IsSeqOneByteString()) {
     Object* o;
-    { MaybeObject* maybe_o = isolate->heap()->AllocateRawAsciiString(length);
+    { MaybeObject* maybe_o = isolate->heap()->AllocateRawOneByteString(length);
       if (!maybe_o->ToObject(&o)) return maybe_o;
     }
-    SeqAsciiString* result = SeqAsciiString::cast(o);
+    SeqOneByteString* result = SeqOneByteString::cast(o);
     bool has_changed_character = ConvertTraits::AsciiConverter::Convert(
-        result->GetChars(), SeqAsciiString::cast(s)->GetChars(), length);
+        result->GetChars(), SeqOneByteString::cast(s)->GetChars(), length);
     return has_changed_character ? result : s;
   }
 
@@ -6256,7 +6146,7 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_StringToArray) {
 
   Handle<FixedArray> elements;
   int position = 0;
-  if (s->IsFlat() && s->IsAsciiRepresentation()) {
+  if (s->IsFlat() && s->IsOneByteRepresentation()) {
     // Try using cached chars where possible.
     Object* obj;
     { MaybeObject* maybe_obj =
@@ -6629,10 +6519,10 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_StringBuilderConcat) {
 
   if (ascii) {
     { MaybeObject* maybe_object =
-          isolate->heap()->AllocateRawAsciiString(length);
+          isolate->heap()->AllocateRawOneByteString(length);
       if (!maybe_object->ToObject(&object)) return maybe_object;
     }
-    SeqAsciiString* answer = SeqAsciiString::cast(object);
+    SeqOneByteString* answer = SeqOneByteString::cast(object);
     StringBuilderConcatHelper(special,
                               answer->GetChars(),
                               fixed_array,
@@ -6791,10 +6681,10 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_SparseJoinWithSeparator) {
 
   // Find total length of join result.
   int string_length = 0;
-  bool is_ascii = separator->IsAsciiRepresentation();
+  bool is_ascii = separator->IsOneByteRepresentation();
   int max_string_length;
   if (is_ascii) {
-    max_string_length = SeqAsciiString::kMaxLength;
+    max_string_length = SeqOneByteString::kMaxLength;
   } else {
     max_string_length = SeqTwoByteString::kMaxLength;
   }
@@ -6808,7 +6698,7 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_SparseJoinWithSeparator) {
     RUNTIME_ASSERT(elements->get(i + 1)->IsString());
     String* string = String::cast(elements->get(i + 1));
     int length = string->length();
-    if (is_ascii && !string->IsAsciiRepresentation()) {
+    if (is_ascii && !string->IsOneByteRepresentation()) {
       is_ascii = false;
       max_string_length = SeqTwoByteString::kMaxLength;
     }
@@ -6844,10 +6734,10 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_SparseJoinWithSeparator) {
 
   if (is_ascii) {
     MaybeObject* result_allocation =
-        isolate->heap()->AllocateRawAsciiString(string_length);
+        isolate->heap()->AllocateRawOneByteString(string_length);
     if (result_allocation->IsFailure()) return result_allocation;
-    SeqAsciiString* result_string =
-        SeqAsciiString::cast(result_allocation->ToObjectUnchecked());
+    SeqOneByteString* result_string =
+        SeqOneByteString::cast(result_allocation->ToObjectUnchecked());
     JoinSparseArrayWithSeparator<char>(elements,
                                        elements_length,
                                        array_length,
@@ -7250,7 +7140,8 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_Math_exp) {
   isolate->counters()->math_exp()->Increment();
 
   CONVERT_DOUBLE_ARG_CHECKED(x, 0);
-  return isolate->transcendental_cache()->Get(TranscendentalCache::EXP, x);
+  lazily_initialize_fast_exp();
+  return isolate->heap()->NumberFromDouble(fast_exp(x));
 }
 
 
@@ -7909,7 +7800,8 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_LazyRecompile) {
 
   // If the function is not optimizable or debugger is active continue using the
   // code from the full compiler.
-  if (!function->shared()->code()->optimizable() ||
+  if (!FLAG_crankshaft ||
+      !function->shared()->code()->optimizable() ||
       isolate->DebuggerHasBreakPoints()) {
     if (FLAG_trace_opt) {
       PrintF("[failed to optimize ");
@@ -7941,7 +7833,34 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_ParallelRecompile) {
   HandleScope handle_scope(isolate);
   ASSERT(FLAG_parallel_recompilation);
   Compiler::RecompileParallel(args.at<JSFunction>(0));
-  return *isolate->factory()->undefined_value();
+  return isolate->heap()->undefined_value();
+}
+
+
+RUNTIME_FUNCTION(MaybeObject*, Runtime_ForceParallelRecompile) {
+  if (!V8::UseCrankshaft()) return isolate->heap()->undefined_value();
+  HandleScope handle_scope(isolate);
+  ASSERT(FLAG_parallel_recompilation && FLAG_manual_parallel_recompilation);
+  if (!isolate->optimizing_compiler_thread()->IsQueueAvailable()) {
+    return isolate->Throw(
+        *isolate->factory()->LookupAsciiSymbol("Recompile queue is full."));
+  }
+  CONVERT_ARG_HANDLE_CHECKED(JSFunction, fun, 0);
+  fun->ReplaceCode(isolate->builtins()->builtin(Builtins::kParallelRecompile));
+  Compiler::RecompileParallel(fun);
+  return isolate->heap()->undefined_value();
+}
+
+
+RUNTIME_FUNCTION(MaybeObject*, Runtime_InstallRecompiledCode) {
+  if (!V8::UseCrankshaft()) return isolate->heap()->undefined_value();
+  HandleScope handle_scope(isolate);
+  ASSERT(FLAG_parallel_recompilation && FLAG_manual_parallel_recompilation);
+  CONVERT_ARG_HANDLE_CHECKED(JSFunction, fun, 0);
+  OptimizingCompilerThread* opt_thread = isolate->optimizing_compiler_thread();
+  Handle<SharedFunctionInfo> shared(fun->shared());
+  while (*opt_thread->InstallNextOptimizedFunction() != *shared) { }
+  return isolate->heap()->undefined_value();
 }
 
 
@@ -7970,35 +7889,6 @@ class ActivationsFinder : public ThreadVisitor {
 };
 
 
-static void MaterializeArgumentsObjectInFrame(Isolate* isolate,
-                                              JavaScriptFrame* frame) {
-  Handle<JSFunction> function(JSFunction::cast(frame->function()), isolate);
-  Handle<Object> arguments;
-  for (int i = frame->ComputeExpressionsCount() - 1; i >= 0; --i) {
-    if (frame->GetExpression(i) == isolate->heap()->arguments_marker()) {
-      if (arguments.is_null()) {
-        // FunctionGetArguments can't throw an exception, so cast away the
-        // doubt with an assert.
-        arguments = Handle<Object>(
-            Accessors::FunctionGetArguments(*function,
-                                            NULL)->ToObjectUnchecked());
-        ASSERT(*arguments != isolate->heap()->null_value());
-        ASSERT(*arguments != isolate->heap()->undefined_value());
-      }
-      frame->SetExpression(i, *arguments);
-      if (FLAG_trace_deopt) {
-        PrintF("Materializing arguments object for frame %p - %p: %p ",
-               reinterpret_cast<void*>(frame->sp()),
-               reinterpret_cast<void*>(frame->fp()),
-               reinterpret_cast<void*>(*arguments));
-        arguments->ShortPrint();
-        PrintF("\n");
-      }
-    }
-  }
-}
-
-
 RUNTIME_FUNCTION(MaybeObject*, Runtime_NotifyDeoptimized) {
   HandleScope scope(isolate);
   ASSERT(args.length() == 1);
@@ -8007,25 +7897,16 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_NotifyDeoptimized) {
       static_cast<Deoptimizer::BailoutType>(args.smi_at(0));
   Deoptimizer* deoptimizer = Deoptimizer::Grab(isolate);
   ASSERT(isolate->heap()->IsAllocationAllowed());
-  int jsframes = deoptimizer->jsframe_count();
+  JavaScriptFrameIterator it(isolate);
 
-  deoptimizer->MaterializeHeapNumbers();
+  // Make sure to materialize objects before causing any allocation.
+  deoptimizer->MaterializeHeapObjects(&it);
   delete deoptimizer;
 
-  JavaScriptFrameIterator it(isolate);
-  for (int i = 0; i < jsframes - 1; i++) {
-    MaterializeArgumentsObjectInFrame(isolate, it.frame());
-    it.Advance();
-  }
-
   JavaScriptFrame* frame = it.frame();
   RUNTIME_ASSERT(frame->function()->IsJSFunction());
   Handle<JSFunction> function(JSFunction::cast(frame->function()), isolate);
-  MaterializeArgumentsObjectInFrame(isolate, frame);
-
-  if (type == Deoptimizer::EAGER) {
-    RUNTIME_ASSERT(function->IsOptimized());
-  }
+  RUNTIME_ASSERT(type != Deoptimizer::EAGER || function->IsOptimized());
 
   // Avoid doing too much work when running with --always-opt and keep
   // the optimized code around.
@@ -8254,15 +8135,8 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_CompileForOnStackReplacement) {
     function->PrintName();
     PrintF("]\n");
   }
-  Handle<Code> check_code;
-  if (FLAG_count_based_interrupts) {
-    InterruptStub interrupt_stub;
-    check_code = interrupt_stub.GetCode();
-  } else  // NOLINT
-  {  // NOLINT
-    StackCheckStub check_stub;
-    check_code = check_stub.GetCode();
-  }
+  InterruptStub interrupt_stub;
+  Handle<Code> check_code = interrupt_stub.GetCode();
   Handle<Code> replacement_code = isolate->builtins()->OnStackReplacement();
   Deoptimizer::RevertStackCheckCode(*unoptimized,
                                     *check_code,
@@ -8524,20 +8398,89 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_IsJSModule) {
 
 
 RUNTIME_FUNCTION(MaybeObject*, Runtime_PushModuleContext) {
-  NoHandleAllocation ha;
-  ASSERT(args.length() == 1);
-  CONVERT_ARG_HANDLE_CHECKED(JSModule, instance, 0);
+  ASSERT(args.length() == 2);
+  CONVERT_SMI_ARG_CHECKED(index, 0);
+
+  if (!args[1]->IsScopeInfo()) {
+    // Module already initialized. Find hosting context and retrieve context.
+    Context* host = Context::cast(isolate->context())->global_context();
+    Context* context = Context::cast(host->get(index));
+    ASSERT(context->previous() == isolate->context());
+    isolate->set_context(context);
+    return context;
+  }
 
-  Context* context = Context::cast(instance->context());
+  CONVERT_ARG_HANDLE_CHECKED(ScopeInfo, scope_info, 1);
+
+  // Allocate module context.
+  HandleScope scope(isolate);
+  Factory* factory = isolate->factory();
+  Handle<Context> context = factory->NewModuleContext(scope_info);
+  Handle<JSModule> module = factory->NewJSModule(context, scope_info);
+  context->set_module(*module);
   Context* previous = isolate->context();
-  ASSERT(context->IsModuleContext());
-  // Initialize the context links.
   context->set_previous(previous);
   context->set_closure(previous->closure());
   context->set_global_object(previous->global_object());
-  isolate->set_context(context);
+  isolate->set_context(*context);
 
-  return context;
+  // Find hosting scope and initialize internal variable holding module there.
+  previous->global_context()->set(index, *context);
+
+  return *context;
+}
+
+
+RUNTIME_FUNCTION(MaybeObject*, Runtime_DeclareModules) {
+  HandleScope scope(isolate);
+  ASSERT(args.length() == 1);
+  CONVERT_ARG_HANDLE_CHECKED(FixedArray, descriptions, 0);
+  Context* host_context = isolate->context();
+
+  for (int i = 0; i < descriptions->length(); ++i) {
+    Handle<ModuleInfo> description(ModuleInfo::cast(descriptions->get(i)));
+    int host_index = description->host_index();
+    Handle<Context> context(Context::cast(host_context->get(host_index)));
+    Handle<JSModule> module(context->module());
+
+    for (int j = 0; j < description->length(); ++j) {
+      Handle<String> name(description->name(j));
+      VariableMode mode = description->mode(j);
+      int index = description->index(j);
+      switch (mode) {
+        case VAR:
+        case LET:
+        case CONST:
+        case CONST_HARMONY: {
+          PropertyAttributes attr =
+              IsImmutableVariableMode(mode) ? FROZEN : SEALED;
+          Handle<AccessorInfo> info =
+              Accessors::MakeModuleExport(name, index, attr);
+          Handle<Object> result = SetAccessor(module, info);
+          ASSERT(!(result.is_null() || result->IsUndefined()));
+          USE(result);
+          break;
+        }
+        case MODULE: {
+          Object* referenced_context = Context::cast(host_context)->get(index);
+          Handle<JSModule> value(Context::cast(referenced_context)->module());
+          JSReceiver::SetProperty(module, name, value, FROZEN, kStrictMode);
+          break;
+        }
+        case INTERNAL:
+        case TEMPORARY:
+        case DYNAMIC:
+        case DYNAMIC_GLOBAL:
+        case DYNAMIC_LOCAL:
+          UNREACHABLE();
+      }
+    }
+
+    JSObject::PreventExtensions(module);
+  }
+
+  ASSERT(!isolate->has_pending_exception());
+  return isolate->heap()->undefined_value();
 }
 
 
@@ -9055,7 +8998,7 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_ParseJson) {
   source = Handle<String>(source->TryFlattenGetString());
   // Optimized fast case where we only have ASCII characters.
   Handle<Object> result;
-  if (source->IsSeqAsciiString()) {
+  if (source->IsSeqOneByteString()) {
     result = JsonParser<true>::Parse(source, zone);
   } else {
     result = JsonParser<false>::Parse(source, zone);
@@ -9098,8 +9041,10 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_CompileString) {
   // strings. Throw an exception if it doesn't.
   if (context->allow_code_gen_from_strings()->IsFalse() &&
       !CodeGenerationFromStringsAllowed(isolate, context)) {
-    return isolate->Throw(*isolate->factory()->NewError(
-        "code_gen_from_strings", HandleVector<Object>(NULL, 0)));
+    Handle<Object> error_message =
+        context->ErrorMessageForCodeGenerationFromStrings();
+    return isolate->Throw(*isolate->factory()->NewEvalError(
+        "code_gen_from_strings", HandleVector<Object>(&error_message, 1)));
   }
 
   // Compile source string in the native context.
@@ -9126,8 +9071,10 @@ static ObjectPair CompileGlobalEval(Isolate* isolate,
   // strings. Throw an exception if it doesn't.
   if (native_context->allow_code_gen_from_strings()->IsFalse() &&
       !CodeGenerationFromStringsAllowed(isolate, native_context)) {
-    isolate->Throw(*isolate->factory()->NewError(
-        "code_gen_from_strings", HandleVector<Object>(NULL, 0)));
+    Handle<Object> error_message =
+        native_context->ErrorMessageForCodeGenerationFromStrings();
+    isolate->Throw(*isolate->factory()->NewEvalError(
+        "code_gen_from_strings", HandleVector<Object>(&error_message, 1)));
     return MakePair(Failure::Exception(), NULL);
   }
 
@@ -9221,7 +9168,7 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_AllocateInNewSpace) {
 RUNTIME_FUNCTION(MaybeObject*, Runtime_PushIfAbsent) {
   ASSERT(args.length() == 2);
   CONVERT_ARG_CHECKED(JSArray, array, 0);
-  CONVERT_ARG_CHECKED(JSObject, element, 1);
+  CONVERT_ARG_CHECKED(JSReceiver, element, 1);
   RUNTIME_ASSERT(array->HasFastSmiOrObjectElements());
   int length = Smi::cast(array->length())->value();
   FixedArray* elements = FixedArray::cast(array->elements());
@@ -9290,7 +9237,7 @@ class ArrayConcatVisitor {
       clear_storage();
       set_storage(*result);
     }
-}
+  }
 
   void increase_index_offset(uint32_t delta) {
     if (JSObject::kMaxElementCount - index_offset_ < delta) {
@@ -9381,10 +9328,22 @@ static uint32_t EstimateElementCount(Handle<JSArray> array) {
       break;
     }
     case FAST_DOUBLE_ELEMENTS:
-    case FAST_HOLEY_DOUBLE_ELEMENTS:
-      // TODO(1810): Decide if it's worthwhile to implement this.
-      UNREACHABLE();
+    case FAST_HOLEY_DOUBLE_ELEMENTS: {
+      // Fast elements can't have lengths that are not representable by
+      // a 32-bit signed integer.
+      ASSERT(static_cast<int32_t>(FixedDoubleArray::kMaxLength) >= 0);
+      int fast_length = static_cast<int>(length);
+      if (array->elements()->IsFixedArray()) {
+        ASSERT(FixedArray::cast(array->elements())->length() == 0);
+        break;
+      }
+      Handle<FixedDoubleArray> elements(
+          FixedDoubleArray::cast(array->elements()));
+      for (int i = 0; i < fast_length; i++) {
+        if (!elements->is_the_hole(i)) element_count++;
+      }
       break;
+    }
     case DICTIONARY_ELEMENTS: {
       Handle<SeededNumberDictionary> dictionary(
           SeededNumberDictionary::cast(array->elements()));
@@ -9627,8 +9586,27 @@ static bool IterateElements(Isolate* isolate,
     }
     case FAST_HOLEY_DOUBLE_ELEMENTS:
     case FAST_DOUBLE_ELEMENTS: {
-      // TODO(1810): Decide if it's worthwhile to implement this.
-      UNREACHABLE();
+      // Run through the elements FixedArray and use HasElement and GetElement
+      // to check the prototype for missing elements.
+      Handle<FixedDoubleArray> elements(
+          FixedDoubleArray::cast(receiver->elements()));
+      int fast_length = static_cast<int>(length);
+      ASSERT(fast_length <= elements->length());
+      for (int j = 0; j < fast_length; j++) {
+        HandleScope loop_scope(isolate);
+        if (!elements->is_the_hole(j)) {
+          double double_value = elements->get_scalar(j);
+          Handle<Object> element_value =
+              isolate->factory()->NewNumber(double_value);
+          visitor->visit(j, element_value);
+        } else if (receiver->HasElement(j)) {
+          // Call GetElement on receiver, not its prototype, or getters won't
+          // have the correct receiver.
+          Handle<Object> element_value = Object::GetElement(receiver, j);
+          RETURN_IF_EMPTY_HANDLE_VALUE(isolate, element_value, false);
+          visitor->visit(j, element_value);
+        }
+      }
       break;
     }
     case DICTIONARY_ELEMENTS: {
@@ -9731,48 +9709,51 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_ArrayConcat) {
   // that mutate other arguments (but will otherwise be precise).
   // The number of elements is precise if there are no inherited elements.
 
+  ElementsKind kind = FAST_SMI_ELEMENTS;
+
   uint32_t estimate_result_length = 0;
   uint32_t estimate_nof_elements = 0;
-  {
-    for (int i = 0; i < argument_count; i++) {
-      HandleScope loop_scope;
-      Handle<Object> obj(elements->get(i));
-      uint32_t length_estimate;
-      uint32_t element_estimate;
-      if (obj->IsJSArray()) {
-        Handle<JSArray> array(Handle<JSArray>::cast(obj));
-        // TODO(1810): Find out if it's worthwhile to properly support
-        // arbitrary ElementsKinds. For now, pessimistically transition to
-        // FAST_*_ELEMENTS.
-        if (array->HasFastDoubleElements()) {
-          ElementsKind to_kind = FAST_ELEMENTS;
-          if (array->HasFastHoleyElements()) {
-            to_kind = FAST_HOLEY_ELEMENTS;
-          }
-          array = Handle<JSArray>::cast(
-              JSObject::TransitionElementsKind(array, to_kind));
+  for (int i = 0; i < argument_count; i++) {
+    HandleScope loop_scope;
+    Handle<Object> obj(elements->get(i));
+    uint32_t length_estimate;
+    uint32_t element_estimate;
+    if (obj->IsJSArray()) {
+      Handle<JSArray> array(Handle<JSArray>::cast(obj));
+      length_estimate = static_cast<uint32_t>(array->length()->Number());
+      if (length_estimate != 0) {
+        ElementsKind array_kind =
+            GetPackedElementsKind(array->map()->elements_kind());
+        if (IsMoreGeneralElementsKindTransition(kind, array_kind)) {
+          kind = array_kind;
         }
-        length_estimate =
-            static_cast<uint32_t>(array->length()->Number());
-        element_estimate =
-            EstimateElementCount(array);
-      } else {
-        length_estimate = 1;
-        element_estimate = 1;
-      }
-      // Avoid overflows by capping at kMaxElementCount.
-      if (JSObject::kMaxElementCount - estimate_result_length <
-          length_estimate) {
-        estimate_result_length = JSObject::kMaxElementCount;
-      } else {
-        estimate_result_length += length_estimate;
       }
-      if (JSObject::kMaxElementCount - estimate_nof_elements <
-          element_estimate) {
-        estimate_nof_elements = JSObject::kMaxElementCount;
-      } else {
-        estimate_nof_elements += element_estimate;
+      element_estimate = EstimateElementCount(array);
+    } else {
+      if (obj->IsHeapObject()) {
+        if (obj->IsNumber()) {
+          if (IsMoreGeneralElementsKindTransition(kind, FAST_DOUBLE_ELEMENTS)) {
+            kind = FAST_DOUBLE_ELEMENTS;
+          }
+        } else if (IsMoreGeneralElementsKindTransition(kind, FAST_ELEMENTS)) {
+          kind = FAST_ELEMENTS;
+        }
       }
+      length_estimate = 1;
+      element_estimate = 1;
+    }
+    // Avoid overflows by capping at kMaxElementCount.
+    if (JSObject::kMaxElementCount - estimate_result_length <
+        length_estimate) {
+      estimate_result_length = JSObject::kMaxElementCount;
+    } else {
+      estimate_result_length += length_estimate;
+    }
+    if (JSObject::kMaxElementCount - estimate_nof_elements <
+        element_estimate) {
+      estimate_nof_elements = JSObject::kMaxElementCount;
+    } else {
+      estimate_nof_elements += element_estimate;
     }
   }
 
@@ -9783,8 +9764,76 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_ArrayConcat) {
 
   Handle<FixedArray> storage;
   if (fast_case) {
-    // The backing storage array must have non-existing elements to
-    // preserve holes across concat operations.
+    if (kind == FAST_DOUBLE_ELEMENTS) {
+      Handle<FixedDoubleArray> double_storage =
+          isolate->factory()->NewFixedDoubleArray(estimate_result_length);
+      int j = 0;
+      bool failure = false;
+      for (int i = 0; i < argument_count; i++) {
+        Handle<Object> obj(elements->get(i));
+        if (obj->IsSmi()) {
+          double_storage->set(j, Smi::cast(*obj)->value());
+          j++;
+        } else if (obj->IsNumber()) {
+          double_storage->set(j, obj->Number());
+          j++;
+        } else {
+          JSArray* array = JSArray::cast(*obj);
+          uint32_t length = static_cast<uint32_t>(array->length()->Number());
+          switch (array->map()->elements_kind()) {
+            case FAST_HOLEY_DOUBLE_ELEMENTS:
+            case FAST_DOUBLE_ELEMENTS: {
+              // Empty fixed array indicates that there are no elements.
+              if (array->elements()->IsFixedArray()) break;
+              FixedDoubleArray* elements =
+                  FixedDoubleArray::cast(array->elements());
+              for (uint32_t i = 0; i < length; i++) {
+                if (elements->is_the_hole(i)) {
+                  failure = true;
+                  break;
+                }
+                double double_value = elements->get_scalar(i);
+                double_storage->set(j, double_value);
+                j++;
+              }
+              break;
+            }
+            case FAST_HOLEY_SMI_ELEMENTS:
+            case FAST_SMI_ELEMENTS: {
+              FixedArray* elements(
+                  FixedArray::cast(array->elements()));
+              for (uint32_t i = 0; i < length; i++) {
+                Object* element = elements->get(i);
+                if (element->IsTheHole()) {
+                  failure = true;
+                  break;
+                }
+                int32_t int_value = Smi::cast(element)->value();
+                double_storage->set(j, int_value);
+                j++;
+              }
+              break;
+            }
+            case FAST_HOLEY_ELEMENTS:
+              ASSERT_EQ(0, length);
+              break;
+            default:
+              UNREACHABLE();
+          }
+        }
+        if (failure) break;
+      }
+      Handle<JSArray> array = isolate->factory()->NewJSArray(0);
+      Smi* length = Smi::FromInt(j);
+      Handle<Map> map;
+      map = isolate->factory()->GetElementsTransitionMap(array, kind);
+      array->set_map(*map);
+      array->set_length(length);
+      array->set_elements(*double_storage);
+      return *array;
+    }
+    // The backing storage array must have non-existing elements to preserve
+    // holes across concat operations.
     storage = isolate->factory()->NewFixedArrayWithHoles(
         estimate_result_length);
   } else {
@@ -9998,8 +10047,8 @@ static MaybeObject* DebugLookupResultValue(Heap* heap,
       return value;
     case FIELD:
       value =
-          JSObject::cast(
-              result->holder())->FastPropertyAt(result->GetFieldIndex());
+          JSObject::cast(result->holder())->FastPropertyAt(
+              result->GetFieldIndex().field_index());
       if (value->IsTheHole()) {
         return heap->undefined_value();
       }
@@ -10638,7 +10687,8 @@ static bool CopyContextLocalsToScopeObject(
 
     RETURN_IF_EMPTY_HANDLE_VALUE(
         isolate,
-        SetProperty(scope_object,
+        SetProperty(isolate,
+                    scope_object,
                     Handle<String>(scope_info->ContextLocalName(i)),
                     Handle<Object>(context->get(context_index), isolate),
                     NONE,
@@ -10673,7 +10723,8 @@ static Handle<JSObject> MaterializeLocalScopeWithFrameInspector(
 
     RETURN_IF_EMPTY_HANDLE_VALUE(
         isolate,
-        SetProperty(local_scope,
+        SetProperty(isolate,
+                    local_scope,
                     Handle<String>(scope_info->ParameterName(i)),
                     value,
                     NONE,
@@ -10685,7 +10736,8 @@ static Handle<JSObject> MaterializeLocalScopeWithFrameInspector(
   for (int i = 0; i < scope_info->StackLocalCount(); ++i) {
     RETURN_IF_EMPTY_HANDLE_VALUE(
         isolate,
-        SetProperty(local_scope,
+        SetProperty(isolate,
+                    local_scope,
                     Handle<String>(scope_info->StackLocalName(i)),
                     Handle<Object>(frame_inspector->GetExpression(i)),
                     NONE,
@@ -10719,7 +10771,8 @@ static Handle<JSObject> MaterializeLocalScopeWithFrameInspector(
           Handle<String> key(String::cast(keys->get(i)));
           RETURN_IF_EMPTY_HANDLE_VALUE(
               isolate,
-              SetProperty(local_scope,
+              SetProperty(isolate,
+                          local_scope,
                           key,
                           GetProperty(ext, key),
                           NONE,
@@ -10780,7 +10833,8 @@ static Handle<JSObject> MaterializeClosure(Isolate* isolate,
       Handle<String> key(String::cast(keys->get(i)));
        RETURN_IF_EMPTY_HANDLE_VALUE(
           isolate,
-          SetProperty(closure_scope,
+          SetProperty(isolate,
+                      closure_scope,
                       key,
                       GetProperty(ext, key),
                       NONE,
@@ -10793,6 +10847,52 @@ static Handle<JSObject> MaterializeClosure(Isolate* isolate,
 }
 
 
+// This method copies structure of MaterializeClosure method above.
+static bool SetClosureVariableValue(Isolate* isolate,
+                                    Handle<Context> context,
+                                    Handle<String> variable_name,
+                                    Handle<Object> new_value) {
+  ASSERT(context->IsFunctionContext());
+
+  Handle<SharedFunctionInfo> shared(context->closure()->shared());
+  Handle<ScopeInfo> scope_info(shared->scope_info());
+
+  // Context locals to the context extension.
+  for (int i = 0; i < scope_info->ContextLocalCount(); i++) {
+    Handle<String> next_name(scope_info->ContextLocalName(i));
+    if (variable_name->Equals(*next_name)) {
+      VariableMode mode;
+      InitializationFlag init_flag;
+      int context_index =
+          scope_info->ContextSlotIndex(*next_name, &mode, &init_flag);
+      if (context_index < 0) {
+        return false;
+      }
+      context->set(context_index, *new_value);
+      return true;
+    }
+  }
+
+  // Properties from the function context extension. This will
+  // be variables introduced by eval.
+  if (context->has_extension()) {
+    Handle<JSObject> ext(JSObject::cast(context->extension()));
+    if (ext->HasProperty(*variable_name)) {
+      // We don't expect this to do anything except replacing property value.
+      SetProperty(isolate,
+                  ext,
+                  variable_name,
+                  new_value,
+                  NONE,
+                  kNonStrictMode);
+      return true;
+    }
+  }
+
+  return false;
+}
+
+
 // Create a plain JSObject which materializes the scope for the specified
 // catch context.
 static Handle<JSObject> MaterializeCatchScope(Isolate* isolate,
@@ -10804,7 +10904,12 @@ static Handle<JSObject> MaterializeCatchScope(Isolate* isolate,
       isolate->factory()->NewJSObject(isolate->object_function());
   RETURN_IF_EMPTY_HANDLE_VALUE(
       isolate,
-      SetProperty(catch_scope, name, thrown_object, NONE, kNonStrictMode),
+      SetProperty(isolate,
+                  catch_scope,
+                  name,
+                  thrown_object,
+                  NONE,
+                  kNonStrictMode),
       Handle<JSObject>());
   return catch_scope;
 }
@@ -10880,7 +10985,8 @@ class ScopeIterator {
       inlined_jsframe_index_(inlined_jsframe_index),
       function_(JSFunction::cast(frame->function())),
       context_(Context::cast(frame->context())),
-      nested_scope_chain_(4) {
+      nested_scope_chain_(4),
+      failed_(false) {
 
     // Catch the case when the debugger stops in an internal function.
     Handle<SharedFunctionInfo> shared_info(function_->shared());
@@ -10954,17 +11060,24 @@ class ScopeIterator {
       frame_(NULL),
       inlined_jsframe_index_(0),
       function_(function),
-      context_(function->context()) {
+      context_(function->context()),
+      failed_(false) {
     if (function->IsBuiltin()) {
       context_ = Handle<Context>();
     }
   }
 
   // More scopes?
-  bool Done() { return context_.is_null(); }
+  bool Done() {
+    ASSERT(!failed_);
+    return context_.is_null();
+  }
+
+  bool Failed() { return failed_; }
 
   // Move to the next scope.
   void Next() {
+    ASSERT(!failed_);
     ScopeType scope_type = Type();
     if (scope_type == ScopeTypeGlobal) {
       // The global scope is always the last in the chain.
@@ -10985,6 +11098,7 @@ class ScopeIterator {
 
   // Return the type of the current scope.
   ScopeType Type() {
+    ASSERT(!failed_);
     if (!nested_scope_chain_.is_empty()) {
       Handle<ScopeInfo> scope_info = nested_scope_chain_.last();
       switch (scope_info->Type()) {
@@ -11034,6 +11148,7 @@ class ScopeIterator {
 
   // Return the JavaScript object with the content of the current scope.
   Handle<JSObject> ScopeObject() {
+    ASSERT(!failed_);
     switch (Type()) {
       case ScopeIterator::ScopeTypeGlobal:
         return Handle<JSObject>(CurrentContext()->global_object());
@@ -11058,7 +11173,35 @@ class ScopeIterator {
     return Handle<JSObject>();
   }
 
+  bool SetVariableValue(Handle<String> variable_name,
+                        Handle<Object> new_value) {
+    ASSERT(!failed_);
+    switch (Type()) {
+      case ScopeIterator::ScopeTypeGlobal:
+        break;
+      case ScopeIterator::ScopeTypeLocal:
+        // TODO(2399): implement.
+        break;
+      case ScopeIterator::ScopeTypeWith:
+        break;
+      case ScopeIterator::ScopeTypeCatch:
+        // TODO(2399): implement.
+        break;
+      case ScopeIterator::ScopeTypeClosure:
+        return SetClosureVariableValue(isolate_, CurrentContext(),
+            variable_name, new_value);
+      case ScopeIterator::ScopeTypeBlock:
+        // TODO(2399): should we implement it?
+        break;
+      case ScopeIterator::ScopeTypeModule:
+        // TODO(2399): should we implement it?
+        break;
+    }
+    return false;
+  }
+
   Handle<ScopeInfo> CurrentScopeInfo() {
+    ASSERT(!failed_);
     if (!nested_scope_chain_.is_empty()) {
       return nested_scope_chain_.last();
     } else if (context_->IsBlockContext()) {
@@ -11072,6 +11215,7 @@ class ScopeIterator {
   // Return the context for this scope. For the local context there might not
   // be an actual context.
   Handle<Context> CurrentContext() {
+    ASSERT(!failed_);
     if (Type() == ScopeTypeGlobal ||
         nested_scope_chain_.is_empty()) {
       return context_;
@@ -11085,6 +11229,7 @@ class ScopeIterator {
 #ifdef DEBUG
   // Debug print of the content of the current scope.
   void DebugPrint() {
+    ASSERT(!failed_);
     switch (Type()) {
       case ScopeIterator::ScopeTypeGlobal:
         PrintF("Global:\n");
@@ -11142,6 +11287,7 @@ class ScopeIterator {
   Handle<JSFunction> function_;
   Handle<Context> context_;
   List<Handle<ScopeInfo> > nested_scope_chain_;
+  bool failed_;
 
   void RetrieveScopeChain(Scope* scope,
                           Handle<SharedFunctionInfo> shared_info) {
@@ -11154,7 +11300,9 @@ class ScopeIterator {
       // faulty. We fail in debug mode but in release mode we only provide the
       // information we get from the context chain but nothing about
       // completely stack allocated scopes or stack allocated locals.
-      UNREACHABLE();
+      // Or it could be due to stack overflow.
+      ASSERT(isolate_->has_pending_exception());
+      failed_ = true;
     }
   }
 
@@ -11291,6 +11439,64 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_GetFunctionScopeDetails) {
 }
 
 
+static bool SetScopeVariableValue(ScopeIterator* it, int index,
+                                  Handle<String> variable_name,
+                                  Handle<Object> new_value) {
+  for (int n = 0; !it->Done() && n < index; it->Next()) {
+    n++;
+  }
+  if (it->Done()) {
+    return false;
+  }
+  return it->SetVariableValue(variable_name, new_value);
+}
+
+
+// Change variable value in closure or local scope
+// args[0]: number or JsFunction: break id or function
+// args[1]: number: frame index (when arg[0] is break id)
+// args[2]: number: inlined frame index (when arg[0] is break id)
+// args[3]: number: scope index
+// args[4]: string: variable name
+// args[5]: object: new value
+//
+// Return true if success and false otherwise
+RUNTIME_FUNCTION(MaybeObject*, Runtime_SetScopeVariableValue) {
+  HandleScope scope(isolate);
+  ASSERT(args.length() == 6);
+
+  // Check arguments.
+  CONVERT_NUMBER_CHECKED(int, index, Int32, args[3]);
+  CONVERT_ARG_HANDLE_CHECKED(String, variable_name, 4);
+  Handle<Object> new_value = args.at<Object>(5);
+
+  bool res;
+  if (args[0]->IsNumber()) {
+    Object* check;
+    { MaybeObject* maybe_check = Runtime_CheckExecutionState(
+        RUNTIME_ARGUMENTS(isolate, args));
+      if (!maybe_check->ToObject(&check)) return maybe_check;
+    }
+    CONVERT_SMI_ARG_CHECKED(wrapped_id, 1);
+    CONVERT_NUMBER_CHECKED(int, inlined_jsframe_index, Int32, args[2]);
+
+    // Get the frame where the debugging is performed.
+    StackFrame::Id id = UnwrapFrameId(wrapped_id);
+    JavaScriptFrameIterator frame_it(isolate, id);
+    JavaScriptFrame* frame = frame_it.frame();
+
+    ScopeIterator it(isolate, frame, inlined_jsframe_index);
+    res = SetScopeVariableValue(&it, index, variable_name, new_value);
+  } else {
+    CONVERT_ARG_HANDLE_CHECKED(JSFunction, fun, 0);
+    ScopeIterator it(isolate, fun);
+    res = SetScopeVariableValue(&it, index, variable_name, new_value);
+  }
+
+  return isolate->heap()->ToBoolean(res);
+}
+
+
 RUNTIME_FUNCTION(MaybeObject*, Runtime_DebugPrintScopes) {
   HandleScope scope(isolate);
   ASSERT(args.length() == 0);
@@ -11579,6 +11785,8 @@ static Handle<Context> CopyNestedScopeContextChain(Isolate* isolate,
   List<Handle<Context> > context_chain;
 
   ScopeIterator it(isolate, frame, inlined_jsframe_index);
+  if (it.Failed()) return Handle<Context>::null();
+
   for (; it.Type() != ScopeIterator::ScopeTypeGlobal &&
          it.Type() != ScopeIterator::ScopeTypeLocal ; it.Next()) {
     ASSERT(!it.Done());
@@ -11607,9 +11815,7 @@ static Handle<Context> CopyNestedScopeContextChain(Isolate* isolate,
       // Materialize the contents of the block scope into a JSObject.
       Handle<JSObject> block_scope_object =
           MaterializeBlockScope(isolate, current);
-      if (block_scope_object.is_null()) {
-        return Handle<Context>::null();
-      }
+      CHECK(!block_scope_object.is_null());
       // Allocate a new function context for the debug evaluation and set the
       // extension object.
       Handle<Context> new_context =
@@ -11770,6 +11976,12 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_DebugEvaluate) {
                                         context,
                                         frame,
                                         inlined_jsframe_index);
+  if (context.is_null()) {
+    ASSERT(isolate->has_pending_exception());
+    MaybeObject* exception = isolate->pending_exception();
+    isolate->clear_pending_exception();
+    return exception;
+  }
 
   if (additional_context->IsJSObject()) {
     Handle<JSObject> extension = Handle<JSObject>::cast(additional_context);
@@ -11813,6 +12025,15 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_DebugEvaluate) {
                                                 scope_info,
                                                 function_context);
 
+  // Check if eval is blocked in the context and temporarily allow it
+  // for debugger.
+  Handle<Context> native_context = Handle<Context>(context->native_context());
+  bool eval_disabled =
+      native_context->allow_code_gen_from_strings()->IsFalse();
+  if (eval_disabled) {
+    native_context->set_allow_code_gen_from_strings(
+        isolate->heap()->true_value());
+  }
   // Invoke the evaluation function and return the result.
   Handle<Object> argv[] = { arguments, source };
   Handle<Object> result =
@@ -11821,6 +12042,10 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_DebugEvaluate) {
                       ARRAY_SIZE(argv),
                       argv,
                       &has_pending_exception);
+  if (eval_disabled) {
+    native_context->set_allow_code_gen_from_strings(
+        isolate->heap()->false_value());
+  }
   if (has_pending_exception) return Failure::Exception();
 
   // Skip the global proxy as it has no properties and always delegates to the
@@ -12856,47 +13081,6 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_GetScript) {
 }
 
 
-// Determines whether the given stack frame should be displayed in
-// a stack trace.  The caller is the error constructor that asked
-// for the stack trace to be collected.  The first time a construct
-// call to this function is encountered it is skipped.  The seen_caller
-// in/out parameter is used to remember if the caller has been seen
-// yet.
-static bool ShowFrameInStackTrace(StackFrame* raw_frame,
-                                  Object* caller,
-                                  bool* seen_caller) {
-  // Only display JS frames.
-  if (!raw_frame->is_java_script()) {
-    return false;
-  }
-  JavaScriptFrame* frame = JavaScriptFrame::cast(raw_frame);
-  Object* raw_fun = frame->function();
-  // Not sure when this can happen but skip it just in case.
-  if (!raw_fun->IsJSFunction()) {
-    return false;
-  }
-  if ((raw_fun == caller) && !(*seen_caller)) {
-    *seen_caller = true;
-    return false;
-  }
-  // Skip all frames until we've seen the caller.
-  if (!(*seen_caller)) return false;
-  // Also, skip non-visible built-in functions and any call with the builtins
-  // object as receiver, so as to not reveal either the builtins object or
-  // an internal function.
-  // The --builtins-in-stack-traces command line flag allows including
-  // internal call sites in the stack trace for debugging purposes.
-  if (!FLAG_builtins_in_stack_traces) {
-    JSFunction* fun = JSFunction::cast(raw_fun);
-    if (frame->receiver()->IsJSBuiltinsObject() ||
-        (fun->IsBuiltin() && !fun->shared()->native())) {
-      return false;
-    }
-  }
-  return true;
-}
-
-
 // Collect the raw data for a stack trace.  Returns an array of 4
 // element segments each containing a receiver, function, code and
 // native code offset.
@@ -12907,57 +13091,23 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_CollectStackTrace) {
   CONVERT_NUMBER_CHECKED(int32_t, limit, Int32, args[2]);
 
   HandleScope scope(isolate);
-  Factory* factory = isolate->factory();
+  // Optionally capture a more detailed stack trace for the message.
+  isolate->CaptureAndSetDetailedStackTrace(error_object);
+  // Capture a simple stack trace for the stack property.
+  return *isolate->CaptureSimpleStackTrace(error_object, caller, limit);
+}
 
-  limit = Max(limit, 0);  // Ensure that limit is not negative.
-  int initial_size = Min(limit, 10);
-  Handle<FixedArray> elements =
-      factory->NewFixedArrayWithHoles(initial_size * 4);
 
-  StackFrameIterator iter(isolate);
-  // If the caller parameter is a function we skip frames until we're
-  // under it before starting to collect.
-  bool seen_caller = !caller->IsJSFunction();
-  int cursor = 0;
-  int frames_seen = 0;
-  while (!iter.done() && frames_seen < limit) {
-    StackFrame* raw_frame = iter.frame();
-    if (ShowFrameInStackTrace(raw_frame, *caller, &seen_caller)) {
-      frames_seen++;
-      JavaScriptFrame* frame = JavaScriptFrame::cast(raw_frame);
-      // Set initial size to the maximum inlining level + 1 for the outermost
-      // function.
-      List<FrameSummary> frames(Compiler::kMaxInliningLevels + 1);
-      frame->Summarize(&frames);
-      for (int i = frames.length() - 1; i >= 0; i--) {
-        if (cursor + 4 > elements->length()) {
-          int new_capacity = JSObject::NewElementsCapacity(elements->length());
-          Handle<FixedArray> new_elements =
-              factory->NewFixedArrayWithHoles(new_capacity);
-          for (int i = 0; i < cursor; i++) {
-            new_elements->set(i, elements->get(i));
-          }
-          elements = new_elements;
-        }
-        ASSERT(cursor + 4 <= elements->length());
-
-        Handle<Object> recv = frames[i].receiver();
-        Handle<JSFunction> fun = frames[i].function();
-        Handle<Code> code = frames[i].code();
-        Handle<Smi> offset(Smi::FromInt(frames[i].offset()));
-        elements->set(cursor++, *recv);
-        elements->set(cursor++, *fun);
-        elements->set(cursor++, *code);
-        elements->set(cursor++, *offset);
-      }
-    }
-    iter.Advance();
-  }
-  Handle<JSArray> result = factory->NewJSArrayWithElements(elements);
-  // Capture and attach a more detailed stack trace if necessary.
-  isolate->CaptureAndSetCurrentStackTraceFor(error_object);
-  result->set_length(Smi::FromInt(cursor));
-  return *result;
+// Retrieve the raw stack trace collected on stack overflow and delete
+// it since it is used only once to avoid keeping it alive.
+RUNTIME_FUNCTION(MaybeObject*, Runtime_GetOverflowedRawStackTrace) {
+  ASSERT_EQ(args.length(), 1);
+  CONVERT_ARG_CHECKED(JSObject, error_object, 0);
+  String* key = isolate->heap()->hidden_stack_trace_symbol();
+  Object* result = error_object->GetHiddenProperty(key);
+  RUNTIME_ASSERT(result->IsJSArray() || result->IsUndefined());
+  error_object->DeleteHiddenProperty(key);
+  return result;
 }
 
 
@@ -12969,7 +13119,7 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_GetV8Version) {
 
   const char* version_string = v8::V8::GetVersion();
 
-  return isolate->heap()->AllocateStringFromAscii(CStrVector(version_string),
+  return isolate->heap()->AllocateStringFromOneByte(CStrVector(version_string),
                                                   NOT_TENURED);
 }
 
@@ -13040,7 +13190,7 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_GetFromCache) {
     if (pending_exception) return Failure::Exception();
   }
 
-#ifdef DEBUG
+#ifdef VERIFY_HEAP
   if (FLAG_verify_heap) {
     cache_handle->JSFunctionResultCacheVerify();
   }
@@ -13071,7 +13221,7 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_GetFromCache) {
   cache_handle->set(index + 1, *value);
   cache_handle->set_finger_index(index);
 
-#ifdef DEBUG
+#ifdef VERIFY_HEAP
   if (FLAG_verify_heap) {
     cache_handle->JSFunctionResultCacheVerify();
   }
@@ -13081,33 +13231,6 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_GetFromCache) {
 }
 
 
-RUNTIME_FUNCTION(MaybeObject*, Runtime_NewMessageObject) {
-  HandleScope scope(isolate);
-  CONVERT_ARG_HANDLE_CHECKED(String, type, 0);
-  CONVERT_ARG_HANDLE_CHECKED(JSArray, arguments, 1);
-  return *isolate->factory()->NewJSMessageObject(
-      type,
-      arguments,
-      0,
-      0,
-      isolate->factory()->undefined_value(),
-      isolate->factory()->undefined_value(),
-      isolate->factory()->undefined_value());
-}
-
-
-RUNTIME_FUNCTION(MaybeObject*, Runtime_MessageGetType) {
-  CONVERT_ARG_CHECKED(JSMessageObject, message, 0);
-  return message->type();
-}
-
-
-RUNTIME_FUNCTION(MaybeObject*, Runtime_MessageGetArguments) {
-  CONVERT_ARG_CHECKED(JSMessageObject, message, 0);
-  return message->arguments();
-}
-
-
 RUNTIME_FUNCTION(MaybeObject*, Runtime_MessageGetStartPosition) {
   CONVERT_ARG_CHECKED(JSMessageObject, message, 0);
   return Smi::FromInt(message->start_position());
@@ -13220,6 +13343,88 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_HaveSameMap) {
   return isolate->heap()->ToBoolean(obj1->map() == obj2->map());
 }
 
+
+RUNTIME_FUNCTION(MaybeObject*, Runtime_IsObserved) {
+  ASSERT(args.length() == 1);
+  CONVERT_ARG_CHECKED(JSReceiver, obj, 0);
+  if (obj->IsJSGlobalProxy()) {
+    Object* proto = obj->GetPrototype();
+    if (obj->IsNull()) return isolate->heap()->false_value();
+    ASSERT(proto->IsJSGlobalObject());
+    obj = JSReceiver::cast(proto);
+  }
+  return isolate->heap()->ToBoolean(obj->map()->is_observed());
+}
+
+
+RUNTIME_FUNCTION(MaybeObject*, Runtime_SetIsObserved) {
+  ASSERT(args.length() == 2);
+  CONVERT_ARG_CHECKED(JSReceiver, obj, 0);
+  CONVERT_BOOLEAN_ARG_CHECKED(is_observed, 1);
+  if (obj->IsJSGlobalProxy()) {
+    Object* proto = obj->GetPrototype();
+    if (obj->IsNull()) return isolate->heap()->undefined_value();
+    ASSERT(proto->IsJSGlobalObject());
+    obj = JSReceiver::cast(proto);
+  }
+  if (obj->map()->is_observed() != is_observed) {
+    MaybeObject* maybe = obj->map()->Copy();
+    Map* map;
+    if (!maybe->To(&map)) return maybe;
+    map->set_is_observed(is_observed);
+    obj->set_map(map);
+  }
+  return isolate->heap()->undefined_value();
+}
+
+
+RUNTIME_FUNCTION(MaybeObject*, Runtime_SetObserverDeliveryPending) {
+  ASSERT(args.length() == 0);
+  isolate->set_observer_delivery_pending(true);
+  return isolate->heap()->undefined_value();
+}
+
+
+RUNTIME_FUNCTION(MaybeObject*, Runtime_GetObservationState) {
+  ASSERT(args.length() == 0);
+  return isolate->heap()->observation_state();
+}
+
+
+RUNTIME_FUNCTION(MaybeObject*, Runtime_CreateObjectHashTable) {
+  ASSERT(args.length() == 0);
+  return ObjectHashTable::Allocate(0);
+}
+
+
+RUNTIME_FUNCTION(MaybeObject*, Runtime_ObjectHashTableGet) {
+  NoHandleAllocation ha;
+  ASSERT(args.length() == 2);
+  CONVERT_ARG_CHECKED(ObjectHashTable, table, 0);
+  Object* key = args[1];
+  if (key->IsJSGlobalProxy()) {
+    key = key->GetPrototype();
+    if (key->IsNull()) return isolate->heap()->undefined_value();
+  }
+  Object* lookup = table->Lookup(key);
+  return lookup->IsTheHole() ? isolate->heap()->undefined_value() : lookup;
+}
+
+
+RUNTIME_FUNCTION(MaybeObject*, Runtime_ObjectHashTableSet) {
+  HandleScope scope(isolate);
+  ASSERT(args.length() == 3);
+  CONVERT_ARG_HANDLE_CHECKED(ObjectHashTable, table, 0);
+  Handle<Object> key = args.at<Object>(1);
+  if (key->IsJSGlobalProxy()) {
+    key = handle(key->GetPrototype(), isolate);
+    if (key->IsNull()) return *table;
+  }
+  Handle<Object> value = args.at<Object>(2);
+  return *PutIntoObjectHashTable(table, key, value);
+}
+
+
 // ----------------------------------------------------------------------------
 // Implementation of Runtime
 
diff --git a/deps/v8/src/runtime.h b/deps/v8/src/runtime.h
index da60ee10b7..c77f988215 100644
--- a/deps/v8/src/runtime.h
+++ b/deps/v8/src/runtime.h
@@ -62,7 +62,6 @@ namespace internal {
   F(GetIndexedInterceptorElementNames, 1, 1) \
   F(GetArgumentsProperty, 1, 1) \
   F(ToFastProperties, 1, 1) \
-  F(ToSlowProperties, 1, 1) \
   F(FinishArrayPrototypeSetup, 1, 1) \
   F(SpecialArrayFunctions, 1, 1) \
   F(GetDefaultReceiver, 1, 1) \
@@ -86,7 +85,9 @@ namespace internal {
   F(NewStrictArgumentsFast, 3, 1) \
   F(LazyCompile, 1, 1) \
   F(LazyRecompile, 1, 1) \
-  F(ParallelRecompile, 1, 1)     \
+  F(ParallelRecompile, 1, 1) \
+  F(ForceParallelRecompile, 1, 1) \
+  F(InstallRecompiledCode, 1, 1) \
   F(NotifyDeoptimized, 1, 1) \
   F(NotifyOSR, 0, 1) \
   F(DeoptimizeFunction, 1, 1) \
@@ -112,7 +113,6 @@ namespace internal {
   F(Typeof, 1, 1) \
   \
   F(StringToNumber, 1, 1) \
-  F(StringFromCharCodeArray, 1, 1) \
   F(StringParseInt, 2, 1) \
   F(StringParseFloat, 1, 1) \
   F(StringToLowerCase, 1, 1) \
@@ -121,9 +121,6 @@ namespace internal {
   F(CharFromCode, 1, 1) \
   F(URIEscape, 1, 1) \
   F(URIUnescape, 1, 1) \
-  F(QuoteJSONString, 1, 1) \
-  F(QuoteJSONStringComma, 1, 1) \
-  F(QuoteJSONStringArray, 1, 1) \
   \
   F(NumberToString, 1, 1) \
   F(NumberToStringSkipCache, 1, 1) \
@@ -192,6 +189,10 @@ namespace internal {
   \
   /* JSON */ \
   F(ParseJson, 1, 1) \
+  F(BasicJSONStringify, 1, 1) \
+  F(QuoteJSONString, 1, 1) \
+  F(QuoteJSONStringComma, 1, 1) \
+  F(QuoteJSONStringArray, 1, 1) \
   \
   /* Strings */ \
   F(StringCharCodeAt, 2, 1) \
@@ -205,6 +206,8 @@ namespace internal {
   F(StringTrim, 3, 1) \
   F(StringToArray, 2, 1) \
   F(NewStringWrapper, 1, 1) \
+  F(NewString, 2, 1) \
+  F(TruncateString, 2, 1) \
   \
   /* Numbers */ \
   F(NumberToRadixString, 2, 1) \
@@ -233,6 +236,7 @@ namespace internal {
   F(FunctionIsBuiltin, 1, 1) \
   F(GetScript, 1, 1) \
   F(CollectStackTrace, 3, 1) \
+  F(GetOverflowedRawStackTrace, 1, 1) \
   F(GetV8Version, 0, 1) \
   \
   F(ClassOf, 1, 1) \
@@ -267,6 +271,7 @@ namespace internal {
   F(DefineOrRedefineDataProperty, 4, 1) \
   F(DefineOrRedefineAccessorProperty, 5, 1) \
   F(IgnoreAttributesAndSetProperty, -1 /* 3 or 4 */, 1) \
+  F(GetDataProperty, 2, 1) \
   \
   /* Arrays */ \
   F(RemoveArrayHoles, 2, 1) \
@@ -302,6 +307,7 @@ namespace internal {
   F(SetAdd, 2, 1) \
   F(SetHas, 2, 1) \
   F(SetDelete, 2, 1) \
+  F(SetGetSize, 1, 1) \
   \
   /* Harmony maps */ \
   F(MapInitialize, 1, 1) \
@@ -309,6 +315,7 @@ namespace internal {
   F(MapHas, 2, 1) \
   F(MapDelete, 2, 1) \
   F(MapSet, 3, 1) \
+  F(MapGetSize, 1, 1) \
   \
   /* Harmony weakmaps */ \
   F(WeakMapInitialize, 1, 1) \
@@ -317,6 +324,15 @@ namespace internal {
   F(WeakMapDelete, 2, 1) \
   F(WeakMapSet, 3, 1) \
   \
+  /* Harmony observe */ \
+  F(IsObserved, 1, 1) \
+  F(SetIsObserved, 2, 1) \
+  F(SetObserverDeliveryPending, 0, 1) \
+  F(GetObservationState, 0, 1) \
+  F(CreateObjectHashTable, 0, 1) \
+  F(ObjectHashTableGet, 2, 1) \
+  F(ObjectHashTableSet, 3, 1) \
+  \
   /* Statements */ \
   F(NewClosure, 3, 1) \
   F(NewObject, 1, 1) \
@@ -336,7 +352,7 @@ namespace internal {
   F(PushWithContext, 2, 1) \
   F(PushCatchContext, 3, 1) \
   F(PushBlockContext, 2, 1) \
-  F(PushModuleContext, 1, 1) \
+  F(PushModuleContext, 2, 1) \
   F(DeleteContextSlot, 2, 1) \
   F(LoadContextSlot, 2, 2) \
   F(LoadContextSlotNoReferenceError, 2, 2) \
@@ -344,6 +360,7 @@ namespace internal {
   \
   /* Declarations and initialization */ \
   F(DeclareGlobals, 3, 1) \
+  F(DeclareModules, 1, 1) \
   F(DeclareContextSlot, 4, 1) \
   F(InitializeVarGlobal, -1 /* 2 or 3 */, 1) \
   F(InitializeConstGlobal, 2, 1) \
@@ -364,9 +381,6 @@ namespace internal {
   F(GetFromCache, 2, 1) \
   \
   /* Message objects */ \
-  F(NewMessageObject, 2, 1) \
-  F(MessageGetType, 1, 1) \
-  F(MessageGetArguments, 1, 1) \
   F(MessageGetStartPosition, 1, 1) \
   F(MessageGetScript, 1, 1) \
   \
@@ -419,6 +433,7 @@ namespace internal {
   F(GetScopeDetails, 4, 1) \
   F(GetFunctionScopeCount, 1, 1) \
   F(GetFunctionScopeDetails, 2, 1) \
+  F(SetScopeVariableValue, 6, 1) \
   F(DebugPrintScopes, 0, 1) \
   F(GetThreadCount, 1, 1) \
   F(GetThreadDetails, 2, 1) \
@@ -515,6 +530,8 @@ namespace internal {
   F(DateField, 2 /* date object, field index */, 1)                          \
   F(StringCharFromCode, 1, 1)                                                \
   F(StringCharAt, 2, 1)                                                      \
+  F(OneByteSeqStringSetChar, 3, 1)                                           \
+  F(TwoByteSeqStringSetChar, 3, 1)                                           \
   F(ObjectEquals, 2, 1)                                                      \
   F(RandomHeapNumber, 0, 1)                                                  \
   F(IsObject, 1, 1)                                                          \
diff --git a/deps/v8/src/scopeinfo.cc b/deps/v8/src/scopeinfo.cc
index 02b4323980..c0b2c4c8e6 100644
--- a/deps/v8/src/scopeinfo.cc
+++ b/deps/v8/src/scopeinfo.cc
@@ -321,6 +321,7 @@ int ScopeInfo::ContextSlotIndex(String* name,
         return result;
       }
     }
+    // Cache as not found. Mode and init flag don't matter.
     context_slot_cache->Update(this, name, INTERNAL, kNeedsInitialization, -1);
   }
   return -1;
@@ -504,4 +505,32 @@ void ScopeInfo::Print() {
 }
 #endif  // DEBUG
 
+
+//---------------------------------------------------------------------------
+// ModuleInfo.
+
+Handle<ModuleInfo> ModuleInfo::Create(
+    Isolate* isolate, Interface* interface, Scope* scope) {
+  Handle<ModuleInfo> info = Allocate(isolate, interface->Length());
+  info->set_host_index(interface->Index());
+  int i = 0;
+  for (Interface::Iterator it = interface->iterator();
+       !it.done(); it.Advance(), ++i) {
+    Variable* var = scope->LocalLookup(it.name());
+    info->set_name(i, *it.name());
+    info->set_mode(i, var->mode());
+    ASSERT((var->mode() == MODULE) == (it.interface()->IsModule()));
+    if (var->mode() == MODULE) {
+      ASSERT(it.interface()->IsFrozen());
+      ASSERT(it.interface()->Index() >= 0);
+      info->set_index(i, it.interface()->Index());
+    } else {
+      ASSERT(var->index() >= 0);
+      info->set_index(i, var->index());
+    }
+  }
+  ASSERT(i == info->length());
+  return info;
+}
+
 } }  // namespace v8::internal
diff --git a/deps/v8/src/scopeinfo.h b/deps/v8/src/scopeinfo.h
index 93734f5a16..a884b3b9ed 100644
--- a/deps/v8/src/scopeinfo.h
+++ b/deps/v8/src/scopeinfo.h
@@ -114,9 +114,9 @@ class ContextSlotCache {
 
     // Bit fields in value_ (type, shift, size). Must be public so the
     // constants can be embedded in generated code.
-    class ModeField:  public BitField<VariableMode,       0, 3> {};
-    class InitField:  public BitField<InitializationFlag, 3, 1> {};
-    class IndexField: public BitField<int,                4, 32-4> {};
+    class ModeField:  public BitField<VariableMode,       0, 4> {};
+    class InitField:  public BitField<InitializationFlag, 4, 1> {};
+    class IndexField: public BitField<int,                5, 32-5> {};
 
    private:
     uint32_t value_;
@@ -130,6 +130,67 @@ class ContextSlotCache {
 };
 
 
+
+
+//---------------------------------------------------------------------------
+// Auxiliary class used for the description of module instances.
+// Used by Runtime_DeclareModules.
+
+class ModuleInfo: public FixedArray {
+ public:
+  static ModuleInfo* cast(Object* description) {
+    return static_cast<ModuleInfo*>(FixedArray::cast(description));
+  }
+
+  static Handle<ModuleInfo> Create(
+      Isolate* isolate, Interface* interface, Scope* scope);
+
+  // Index of module's context in host context.
+  int host_index() { return Smi::cast(get(HOST_OFFSET))->value(); }
+
+  // Name, mode, and index of the i-th export, respectively.
+  // For value exports, the index is the slot of the value in the module
+  // context, for exported modules it is the slot index of the
+  // referred module's context in the host context.
+  // TODO(rossberg): This format cannot yet handle exports of modules declared
+  // in earlier scripts.
+  String* name(int i) { return String::cast(get(name_offset(i))); }
+  VariableMode mode(int i) {
+    return static_cast<VariableMode>(Smi::cast(get(mode_offset(i)))->value());
+  }
+  int index(int i) { return Smi::cast(get(index_offset(i)))->value(); }
+
+  int length() { return (FixedArray::length() - HEADER_SIZE) / ITEM_SIZE; }
+
+ private:
+  // The internal format is: Index, (Name, VariableMode, Index)*
+  enum {
+    HOST_OFFSET,
+    NAME_OFFSET,
+    MODE_OFFSET,
+    INDEX_OFFSET,
+    HEADER_SIZE = NAME_OFFSET,
+    ITEM_SIZE = INDEX_OFFSET - NAME_OFFSET + 1
+  };
+  inline int name_offset(int i) { return NAME_OFFSET + i * ITEM_SIZE; }
+  inline int mode_offset(int i) { return MODE_OFFSET + i * ITEM_SIZE; }
+  inline int index_offset(int i) { return INDEX_OFFSET + i * ITEM_SIZE; }
+
+  static Handle<ModuleInfo> Allocate(Isolate* isolate, int length) {
+    return Handle<ModuleInfo>::cast(
+        isolate->factory()->NewFixedArray(HEADER_SIZE + ITEM_SIZE * length));
+  }
+  void set_host_index(int index) { set(HOST_OFFSET, Smi::FromInt(index)); }
+  void set_name(int i, String* name) { set(name_offset(i), name); }
+  void set_mode(int i, VariableMode mode) {
+    set(mode_offset(i), Smi::FromInt(mode));
+  }
+  void set_index(int i, int index) {
+    set(index_offset(i), Smi::FromInt(index));
+  }
+};
+
+
 } }  // namespace v8::internal
 
 #endif  // V8_SCOPEINFO_H_
diff --git a/deps/v8/src/scopes.cc b/deps/v8/src/scopes.cc
index c9612577af..56a922d25d 100644
--- a/deps/v8/src/scopes.cc
+++ b/deps/v8/src/scopes.cc
@@ -108,6 +108,7 @@ Scope::Scope(Scope* outer_scope, ScopeType type, Zone* zone)
     : isolate_(Isolate::Current()),
       inner_scopes_(4, zone),
       variables_(zone),
+      internals_(4, zone),
       temps_(4, zone),
       params_(4, zone),
       unresolved_(16, zone),
@@ -131,6 +132,7 @@ Scope::Scope(Scope* inner_scope,
     : isolate_(Isolate::Current()),
       inner_scopes_(4, zone),
       variables_(zone),
+      internals_(4, zone),
       temps_(4, zone),
       params_(4, zone),
       unresolved_(16, zone),
@@ -153,6 +155,7 @@ Scope::Scope(Scope* inner_scope, Handle<String> catch_variable_name, Zone* zone)
     : isolate_(Isolate::Current()),
       inner_scopes_(1, zone),
       variables_(zone),
+      internals_(0, zone),
       temps_(0, zone),
       params_(0, zone),
       unresolved_(0, zone),
@@ -197,6 +200,8 @@ void Scope::SetDefaults(ScopeType type,
   num_var_or_const_ = 0;
   num_stack_slots_ = 0;
   num_heap_slots_ = 0;
+  num_modules_ = 0;
+  module_var_ = NULL,
   scope_info_ = scope_info;
   start_position_ = RelocInfo::kNoPosition;
   end_position_ = RelocInfo::kNoPosition;
@@ -375,6 +380,7 @@ void Scope::Initialize() {
 
 Scope* Scope::FinalizeBlockScope() {
   ASSERT(is_block_scope());
+  ASSERT(internals_.is_empty());
   ASSERT(temps_.is_empty());
   ASSERT(params_.is_empty());
 
@@ -515,6 +521,19 @@ void Scope::RemoveUnresolved(VariableProxy* var) {
 }
 
 
+Variable* Scope::NewInternal(Handle<String> name) {
+  ASSERT(!already_resolved());
+  Variable* var = new(zone()) Variable(this,
+                                       name,
+                                       INTERNAL,
+                                       false,
+                                       Variable::NORMAL,
+                                       kCreatedInitialized);
+  internals_.Add(var, zone());
+  return var;
+}
+
+
 Variable* Scope::NewTemporary(Handle<String> name) {
   ASSERT(!already_resolved());
   Variable* var = new(zone()) Variable(this,
@@ -615,6 +634,15 @@ void Scope::CollectStackAndContextLocals(ZoneList<Variable*>* stack_locals,
   ASSERT(stack_locals != NULL);
   ASSERT(context_locals != NULL);
 
+  // Collect internals which are always allocated on the heap.
+  for (int i = 0; i < internals_.length(); i++) {
+    Variable* var = internals_[i];
+    if (var->is_used()) {
+      ASSERT(var->IsContextSlot());
+      context_locals->Add(var, zone());
+    }
+  }
+
   // Collect temporaries which are always allocated on the stack.
   for (int i = 0; i < temps_.length(); i++) {
     Variable* var = temps_[i];
@@ -624,9 +652,8 @@ void Scope::CollectStackAndContextLocals(ZoneList<Variable*>* stack_locals,
     }
   }
 
-  ZoneList<VarAndOrder> vars(variables_.occupancy(), zone());
-
   // Collect declared local variables.
+  ZoneList<VarAndOrder> vars(variables_.occupancy(), zone());
   for (VariableMap::Entry* p = variables_.Start();
        p != NULL;
        p = variables_.Next(p)) {
@@ -659,18 +686,18 @@ bool Scope::AllocateVariables(CompilationInfo* info,
   }
   PropagateScopeInfo(outer_scope_calls_non_strict_eval);
 
-  // 2) Resolve variables.
+  // 2) Allocate module instances.
+  if (FLAG_harmony_modules && (is_global_scope() || is_module_scope())) {
+    ASSERT(num_modules_ == 0);
+    AllocateModulesRecursively(this);
+  }
+
+  // 3) Resolve variables.
   if (!ResolveVariablesRecursively(info, factory)) return false;
 
-  // 3) Allocate variables.
+  // 4) Allocate variables.
   AllocateVariablesRecursively();
 
-  // 4) Allocate and link module instance objects.
-  if (FLAG_harmony_modules && (is_global_scope() || is_module_scope())) {
-    AllocateModules(info);
-    LinkModules(info);
-  }
-
   return true;
 }
 
@@ -702,17 +729,12 @@ bool Scope::HasTrivialOuterContext() const {
 bool Scope::HasLazyCompilableOuterContext() const {
   Scope* outer = outer_scope_;
   if (outer == NULL) return true;
-  // There are several reasons that prevent lazy compilation:
-  // - This scope is inside a with scope and all declaration scopes between
-  //   them have empty contexts. Such declaration scopes become invisible
-  //   during scope info deserialization.
-  // - This scope is inside a strict eval scope with variables that are
-  //   potentially context allocated in an artificial function scope that
-  //   is not deserialized correctly.
+  // We have to prevent lazy compilation if this scope is inside a with scope
+  // and all declaration scopes between them have empty contexts. Such
+  // declaration scopes may become invisible during scope info deserialization.
   outer = outer->DeclarationScope();
   bool found_non_trivial_declarations = false;
   for (const Scope* scope = outer; scope != NULL; scope = scope->outer_scope_) {
-    if (scope->is_eval_scope()) return false;
     if (scope->is_with_scope() && !found_non_trivial_declarations) return false;
     if (scope->is_declaration_scope() && scope->num_heap_slots() > 0) {
       found_non_trivial_declarations = true;
@@ -742,6 +764,15 @@ int Scope::ContextChainLength(Scope* scope) {
 }
 
 
+Scope* Scope::GlobalScope() {
+  Scope* scope = this;
+  while (!scope->is_global_scope()) {
+    scope = scope->outer_scope();
+  }
+  return scope;
+}
+
+
 Scope* Scope::DeclarationScope() {
   Scope* scope = this;
   while (!scope->is_declaration_scope()) {
@@ -915,6 +946,11 @@ void Scope::Print(int n) {
     PrintVar(n1, temps_[i]);
   }
 
+  Indent(n1, "// internal vars\n");
+  for (int i = 0; i < internals_.length(); i++) {
+    PrintVar(n1, internals_[i]);
+  }
+
   Indent(n1, "// local vars\n");
   PrintMap(n1, &variables_);
 
@@ -1065,7 +1101,6 @@ bool Scope::ResolveVariable(CompilationInfo* info,
   }
 
   ASSERT(var != NULL);
-  proxy->BindTo(var);
 
   if (FLAG_harmony_modules) {
     bool ok;
@@ -1101,6 +1136,8 @@ bool Scope::ResolveVariable(CompilationInfo* info,
     }
   }
 
+  proxy->BindTo(var);
+
   return true;
 }
 
@@ -1175,6 +1212,7 @@ bool Scope::MustAllocateInContext(Variable* var) {
   // Exceptions: temporary variables are never allocated in a context;
   // catch-bound variables are always allocated in a context.
   if (var->mode() == TEMPORARY) return false;
+  if (var->mode() == INTERNAL) return true;
   if (is_catch_scope() || is_block_scope() || is_module_scope()) return true;
   if (is_global_scope() && IsLexicalVariableMode(var->mode())) return true;
   return var->has_forced_context_allocation() ||
@@ -1281,15 +1319,17 @@ void Scope::AllocateNonParameterLocals() {
     AllocateNonParameterLocal(temps_[i]);
   }
 
-  ZoneList<VarAndOrder> vars(variables_.occupancy(), zone());
+  for (int i = 0; i < internals_.length(); i++) {
+    AllocateNonParameterLocal(internals_[i]);
+  }
 
+  ZoneList<VarAndOrder> vars(variables_.occupancy(), zone());
   for (VariableMap::Entry* p = variables_.Start();
        p != NULL;
        p = variables_.Next(p)) {
     Variable* var = reinterpret_cast<Variable*>(p->value);
     vars.Add(VarAndOrder(var, p->order), zone());
   }
-
   vars.Sort(VarAndOrder::Compare);
   int var_count = vars.length();
   for (int i = 0; i < var_count; i++) {
@@ -1342,89 +1382,35 @@ void Scope::AllocateVariablesRecursively() {
 }
 
 
-int Scope::StackLocalCount() const {
-  return num_stack_slots() -
-      (function_ != NULL && function_->proxy()->var()->IsStackLocal() ? 1 : 0);
-}
-
-
-int Scope::ContextLocalCount() const {
-  if (num_heap_slots() == 0) return 0;
-  return num_heap_slots() - Context::MIN_CONTEXT_SLOTS -
-      (function_ != NULL && function_->proxy()->var()->IsContextSlot() ? 1 : 0);
-}
-
-
-void Scope::AllocateModules(CompilationInfo* info) {
-  ASSERT(is_global_scope() || is_module_scope());
-
+void Scope::AllocateModulesRecursively(Scope* host_scope) {
+  if (already_resolved()) return;
   if (is_module_scope()) {
     ASSERT(interface_->IsFrozen());
-    ASSERT(scope_info_.is_null());
-
-    // TODO(rossberg): This has to be the initial compilation of this code.
-    // We currently do not allow recompiling any module definitions.
-    Handle<ScopeInfo> scope_info = GetScopeInfo();
-    Factory* factory = info->isolate()->factory();
-    Handle<Context> context = factory->NewModuleContext(scope_info);
-    Handle<JSModule> instance = factory->NewJSModule(context, scope_info);
-    context->set_module(*instance);
-
-    bool ok;
-    interface_->MakeSingleton(instance, &ok);
-    ASSERT(ok);
+    const char raw_name[] = ".module";
+    Handle<String> name = isolate_->factory()->LookupSymbol(
+        Vector<const char>(raw_name, StrLength(raw_name)));
+    ASSERT(module_var_ == NULL);
+    module_var_ = host_scope->NewInternal(name);
+    ++host_scope->num_modules_;
   }
 
-  // Allocate nested modules.
   for (int i = 0; i < inner_scopes_.length(); i++) {
     Scope* inner_scope = inner_scopes_.at(i);
-    if (inner_scope->is_module_scope()) {
-      inner_scope->AllocateModules(info);
-    }
+    inner_scope->AllocateModulesRecursively(host_scope);
   }
 }
 
 
-void Scope::LinkModules(CompilationInfo* info) {
-  ASSERT(is_global_scope() || is_module_scope());
+int Scope::StackLocalCount() const {
+  return num_stack_slots() -
+      (function_ != NULL && function_->proxy()->var()->IsStackLocal() ? 1 : 0);
+}
 
-  if (is_module_scope()) {
-    Handle<JSModule> instance = interface_->Instance();
-
-    // Populate the module instance object.
-    const PropertyAttributes ro_attr =
-        static_cast<PropertyAttributes>(READ_ONLY | DONT_DELETE | DONT_ENUM);
-    const PropertyAttributes rw_attr =
-        static_cast<PropertyAttributes>(DONT_DELETE | DONT_ENUM);
-    for (Interface::Iterator it = interface_->iterator();
-         !it.done(); it.Advance()) {
-      if (it.interface()->IsModule()) {
-        Handle<Object> value = it.interface()->Instance();
-        ASSERT(!value.is_null());
-        JSReceiver::SetProperty(
-            instance, it.name(), value, ro_attr, kStrictMode);
-      } else {
-        Variable* var = LocalLookup(it.name());
-        ASSERT(var != NULL && var->IsContextSlot());
-        PropertyAttributes attr = var->is_const_mode() ? ro_attr : rw_attr;
-        Handle<AccessorInfo> info =
-            Accessors::MakeModuleExport(it.name(), var->index(), attr);
-        Handle<Object> result = SetAccessor(instance, info);
-        ASSERT(!(result.is_null() || result->IsUndefined()));
-        USE(result);
-      }
-    }
-    USE(JSObject::PreventExtensions(instance));
-  }
 
-  // Link nested modules.
-  for (int i = 0; i < inner_scopes_.length(); i++) {
-    Scope* inner_scope = inner_scopes_.at(i);
-    if (inner_scope->is_module_scope()) {
-      inner_scope->LinkModules(info);
-    }
-  }
+int Scope::ContextLocalCount() const {
+  if (num_heap_slots() == 0) return 0;
+  return num_heap_slots() - Context::MIN_CONTEXT_SLOTS -
+      (function_ != NULL && function_->proxy()->var()->IsContextSlot() ? 1 : 0);
 }
 
-
 } }  // namespace v8::internal
diff --git a/deps/v8/src/scopes.h b/deps/v8/src/scopes.h
index 6e35d05a7f..c60c2e7d49 100644
--- a/deps/v8/src/scopes.h
+++ b/deps/v8/src/scopes.h
@@ -186,10 +186,16 @@ class Scope: public ZoneObject {
   // such a variable again if it was added; otherwise this is a no-op.
   void RemoveUnresolved(VariableProxy* var);
 
-  // Creates a new temporary variable in this scope.  The name is only used
+  // Creates a new internal variable in this scope.  The name is only used
   // for printing and cannot be used to find the variable.  In particular,
   // the only way to get hold of the temporary is by keeping the Variable*
   // around.
+  Variable* NewInternal(Handle<String> name);
+
+  // Creates a new temporary variable in this scope.  The name is only used
+  // for printing and cannot be used to find the variable.  In particular,
+  // the only way to get hold of the temporary is by keeping the Variable*
+  // around.  The name should not clash with a legitimate variable names.
   Variable* NewTemporary(Handle<String> name);
 
   // Adds the specific declaration node to the list of declarations in
@@ -369,6 +375,12 @@ class Scope: public ZoneObject {
   int StackLocalCount() const;
   int ContextLocalCount() const;
 
+  // For global scopes, the number of module literals (including nested ones).
+  int num_modules() const { return num_modules_; }
+
+  // For module scopes, the host scope's internal variable binding this module.
+  Variable* module_var() const { return module_var_; }
+
   // Make sure this scope and all outer scopes are eagerly compiled.
   void ForceEagerCompilation()  { force_eager_compilation_ = true; }
 
@@ -387,6 +399,9 @@ class Scope: public ZoneObject {
   // The number of contexts between this and scope; zero if this == scope.
   int ContextChainLength(Scope* scope);
 
+  // Find the innermost global scope.
+  Scope* GlobalScope();
+
   // Find the first function, global, or eval scope.  This is the scope
   // where var declarations will be hoisted to in the implementation.
   Scope* DeclarationScope();
@@ -441,6 +456,8 @@ class Scope: public ZoneObject {
   // variables may be implicitly 'declared' by being used (possibly in
   // an inner scope) with no intervening with statements or eval calls.
   VariableMap variables_;
+  // Compiler-allocated (user-invisible) internals.
+  ZoneList<Variable*> internals_;
   // Compiler-allocated (user-invisible) temporaries.
   ZoneList<Variable*> temps_;
   // Parameter list in source order.
@@ -494,6 +511,12 @@ class Scope: public ZoneObject {
   int num_stack_slots_;
   int num_heap_slots_;
 
+  // The number of modules (including nested ones).
+  int num_modules_;
+
+  // For module scopes, the host scope's internal variable binding this module.
+  Variable* module_var_;
+
   // Serialized scope info support.
   Handle<ScopeInfo> scope_info_;
   bool already_resolved() { return already_resolved_; }
@@ -578,6 +601,7 @@ class Scope: public ZoneObject {
   void AllocateNonParameterLocal(Variable* var);
   void AllocateNonParameterLocals();
   void AllocateVariablesRecursively();
+  void AllocateModulesRecursively(Scope* host_scope);
 
   // Resolve and fill in the allocation information for all variables
   // in this scopes. Must be called *after* all scopes have been
@@ -591,13 +615,6 @@ class Scope: public ZoneObject {
   bool AllocateVariables(CompilationInfo* info,
                          AstNodeFactory<AstNullVisitor>* factory);
 
-  // Instance objects have to be created ahead of time (before code generation)
-  // because of potentially cyclic references between them.
-  // Linking also has to be a separate stage, since populating one object may
-  // potentially require (forward) references to others.
-  void AllocateModules(CompilationInfo* info);
-  void LinkModules(CompilationInfo* info);
-
  private:
   // Construct a scope based on the scope info.
   Scope(Scope* inner_scope, ScopeType type, Handle<ScopeInfo> scope_info,
diff --git a/deps/v8/src/serialize.cc b/deps/v8/src/serialize.cc
index 792f25c51d..dfc55740a3 100644
--- a/deps/v8/src/serialize.cc
+++ b/deps/v8/src/serialize.cc
@@ -523,6 +523,10 @@ void ExternalReferenceTable::PopulateTable(Isolate* isolate) {
       UNCLASSIFIED,
       50,
       "pending_message_script");
+  Add(ExternalReference::get_make_code_young_function(isolate).address(),
+      UNCLASSIFIED,
+      51,
+      "Code::MakeCodeYoung");
 }
 
 
@@ -599,109 +603,34 @@ Deserializer::Deserializer(SnapshotByteSource* source)
     : isolate_(NULL),
       source_(source),
       external_reference_decoder_(NULL) {
-}
-
-
-// This routine both allocates a new object, and also keeps
-// track of where objects have been allocated so that we can
-// fix back references when deserializing.
-Address Deserializer::Allocate(int space_index, Space* space, int size) {
-  Address address;
-  if (!SpaceIsLarge(space_index)) {
-    ASSERT(!SpaceIsPaged(space_index) ||
-           size <= Page::kPageSize - Page::kObjectStartOffset);
-    MaybeObject* maybe_new_allocation;
-    if (space_index == NEW_SPACE) {
-      maybe_new_allocation =
-          reinterpret_cast<NewSpace*>(space)->AllocateRaw(size);
-    } else {
-      maybe_new_allocation =
-          reinterpret_cast<PagedSpace*>(space)->AllocateRaw(size);
-    }
-    ASSERT(!maybe_new_allocation->IsFailure());
-    Object* new_allocation = maybe_new_allocation->ToObjectUnchecked();
-    HeapObject* new_object = HeapObject::cast(new_allocation);
-    address = new_object->address();
-    high_water_[space_index] = address + size;
-  } else {
-    ASSERT(SpaceIsLarge(space_index));
-    LargeObjectSpace* lo_space = reinterpret_cast<LargeObjectSpace*>(space);
-    Object* new_allocation;
-    if (space_index == kLargeData || space_index == kLargeFixedArray) {
-      new_allocation =
-          lo_space->AllocateRaw(size, NOT_EXECUTABLE)->ToObjectUnchecked();
-    } else {
-      ASSERT_EQ(kLargeCode, space_index);
-      new_allocation =
-          lo_space->AllocateRaw(size, EXECUTABLE)->ToObjectUnchecked();
-    }
-    HeapObject* new_object = HeapObject::cast(new_allocation);
-    // Record all large objects in the same space.
-    address = new_object->address();
-    pages_[LO_SPACE].Add(address);
+  for (int i = 0; i < LAST_SPACE + 1; i++) {
+    reservations_[i] = kUninitializedReservation;
   }
-  last_object_address_ = address;
-  return address;
-}
-
-
-// This returns the address of an object that has been described in the
-// snapshot as being offset bytes back in a particular space.
-HeapObject* Deserializer::GetAddressFromEnd(int space) {
-  int offset = source_->GetInt();
-  ASSERT(!SpaceIsLarge(space));
-  offset <<= kObjectAlignmentBits;
-  return HeapObject::FromAddress(high_water_[space] - offset);
-}
-
-
-// This returns the address of an object that has been described in the
-// snapshot as being offset bytes into a particular space.
-HeapObject* Deserializer::GetAddressFromStart(int space) {
-  int offset = source_->GetInt();
-  if (SpaceIsLarge(space)) {
-    // Large spaces have one object per 'page'.
-    return HeapObject::FromAddress(pages_[LO_SPACE][offset]);
-  }
-  offset <<= kObjectAlignmentBits;
-  if (space == NEW_SPACE) {
-    // New space has only one space - numbered 0.
-    return HeapObject::FromAddress(pages_[space][0] + offset);
-  }
-  ASSERT(SpaceIsPaged(space));
-  int page_of_pointee = offset >> kPageSizeBits;
-  Address object_address = pages_[space][page_of_pointee] +
-                           (offset & Page::kPageAlignmentMask);
-  return HeapObject::FromAddress(object_address);
 }
 
 
 void Deserializer::Deserialize() {
   isolate_ = Isolate::Current();
   ASSERT(isolate_ != NULL);
-  {
-    // Don't GC while deserializing - just expand the heap.
-    AlwaysAllocateScope always_allocate;
-    // Don't use the free lists while deserializing.
-    LinearAllocationScope allocate_linearly;
-    // No active threads.
-    ASSERT_EQ(NULL, isolate_->thread_manager()->FirstThreadStateInUse());
-    // No active handles.
-    ASSERT(isolate_->handle_scope_implementer()->blocks()->is_empty());
-    ASSERT_EQ(NULL, external_reference_decoder_);
-    external_reference_decoder_ = new ExternalReferenceDecoder();
-    isolate_->heap()->IterateStrongRoots(this, VISIT_ONLY_STRONG);
-    isolate_->heap()->IterateWeakRoots(this, VISIT_ALL);
-
-    isolate_->heap()->set_native_contexts_list(
-        isolate_->heap()->undefined_value());
-
-    // Update data pointers to the external strings containing natives sources.
-    for (int i = 0; i < Natives::GetBuiltinsCount(); i++) {
-      Object* source = isolate_->heap()->natives_source_cache()->get(i);
-      if (!source->IsUndefined()) {
-        ExternalAsciiString::cast(source)->update_data_cache();
-      }
+  isolate_->heap()->ReserveSpace(reservations_, &high_water_[0]);
+  // No active threads.
+  ASSERT_EQ(NULL, isolate_->thread_manager()->FirstThreadStateInUse());
+  // No active handles.
+  ASSERT(isolate_->handle_scope_implementer()->blocks()->is_empty());
+  ASSERT_EQ(NULL, external_reference_decoder_);
+  external_reference_decoder_ = new ExternalReferenceDecoder();
+  isolate_->heap()->IterateStrongRoots(this, VISIT_ONLY_STRONG);
+  isolate_->heap()->RepairFreeListsAfterBoot();
+  isolate_->heap()->IterateWeakRoots(this, VISIT_ALL);
+
+  isolate_->heap()->set_native_contexts_list(
+      isolate_->heap()->undefined_value());
+
+  // Update data pointers to the external strings containing natives sources.
+  for (int i = 0; i < Natives::GetBuiltinsCount(); i++) {
+    Object* source = isolate_->heap()->natives_source_cache()->get(i);
+    if (!source->IsUndefined()) {
+      ExternalAsciiString::cast(source)->update_data_cache();
     }
   }
 
@@ -713,10 +642,10 @@ void Deserializer::Deserialize() {
 
 void Deserializer::DeserializePartial(Object** root) {
   isolate_ = Isolate::Current();
-  // Don't GC while deserializing - just expand the heap.
-  AlwaysAllocateScope always_allocate;
-  // Don't use the free lists while deserializing.
-  LinearAllocationScope allocate_linearly;
+  for (int i = NEW_SPACE; i < kNumberOfSpaces; i++) {
+    ASSERT(reservations_[i] != kUninitializedReservation);
+  }
+  isolate_->heap()->ReserveSpace(reservations_, &high_water_[0]);
   if (external_reference_decoder_ == NULL) {
     external_reference_decoder_ = new ExternalReferenceDecoder();
   }
@@ -758,10 +687,9 @@ void Deserializer::VisitPointers(Object** start, Object** end) {
 // written very late, which means the FreeSpace map is not set up by the
 // time we need to use it to mark the space at the end of a page free.
 void Deserializer::ReadObject(int space_number,
-                              Space* space,
                               Object** write_back) {
   int size = source_->GetInt() << kObjectAlignmentBits;
-  Address address = Allocate(space_number, space, size);
+  Address address = Allocate(space_number, size);
   *write_back = HeapObject::FromAddress(address);
   Object** current = reinterpret_cast<Object**>(address);
   Object** limit = current + (size >> kPointerSizeLog2);
@@ -770,44 +698,19 @@ void Deserializer::ReadObject(int space_number,
   }
   ReadChunk(current, limit, space_number, address);
 #ifdef DEBUG
-  bool is_codespace = (space == HEAP->code_space()) ||
-      ((space == HEAP->lo_space()) && (space_number == kLargeCode));
+  bool is_codespace = (space_number == CODE_SPACE);
   ASSERT(HeapObject::FromAddress(address)->IsCode() == is_codespace);
 #endif
 }
 
-
-// This macro is always used with a constant argument so it should all fold
-// away to almost nothing in the generated code.  It might be nicer to do this
-// with the ternary operator but there are type issues with that.
-#define ASSIGN_DEST_SPACE(space_number)                                        \
-  Space* dest_space;                                                           \
-  if (space_number == NEW_SPACE) {                                             \
-    dest_space = isolate->heap()->new_space();                                \
-  } else if (space_number == OLD_POINTER_SPACE) {                              \
-    dest_space = isolate->heap()->old_pointer_space();                         \
-  } else if (space_number == OLD_DATA_SPACE) {                                 \
-    dest_space = isolate->heap()->old_data_space();                            \
-  } else if (space_number == CODE_SPACE) {                                     \
-    dest_space = isolate->heap()->code_space();                                \
-  } else if (space_number == MAP_SPACE) {                                      \
-    dest_space = isolate->heap()->map_space();                                 \
-  } else if (space_number == CELL_SPACE) {                                     \
-    dest_space = isolate->heap()->cell_space();                                \
-  } else {                                                                     \
-    ASSERT(space_number >= LO_SPACE);                                          \
-    dest_space = isolate->heap()->lo_space();                                  \
-  }
-
-
-static const int kUnknownOffsetFromStart = -1;
-
-
 void Deserializer::ReadChunk(Object** current,
                              Object** limit,
                              int source_space,
                              Address current_object_address) {
   Isolate* const isolate = isolate_;
+  // Write barrier support costs around 1% in startup time.  In fact there
+  // are no new space objects in current boot snapshots, so it's not needed,
+  // but that may change.
   bool write_barrier_needed = (current_object_address != NULL &&
                                source_space != NEW_SPACE &&
                                source_space != CELL_SPACE &&
@@ -823,21 +726,19 @@ void Deserializer::ReadChunk(Object** current,
       ASSERT((within & ~kWhereToPointMask) == 0);                              \
       ASSERT((space_number & ~kSpaceMask) == 0);
 
-#define CASE_BODY(where, how, within, space_number_if_any, offset_from_start)  \
+#define CASE_BODY(where, how, within, space_number_if_any)                     \
       {                                                                        \
         bool emit_write_barrier = false;                                       \
         bool current_was_incremented = false;                                  \
         int space_number =  space_number_if_any == kAnyOldSpace ?              \
                             (data & kSpaceMask) : space_number_if_any;         \
         if (where == kNewObject && how == kPlain && within == kStartOfObject) {\
-          ASSIGN_DEST_SPACE(space_number)                                      \
-          ReadObject(space_number, dest_space, current);                       \
+          ReadObject(space_number, current);                                   \
           emit_write_barrier = (space_number == NEW_SPACE);                    \
         } else {                                                               \
           Object* new_object = NULL;  /* May not be a real Object pointer. */  \
           if (where == kNewObject) {                                           \
-            ASSIGN_DEST_SPACE(space_number)                                    \
-            ReadObject(space_number, dest_space, &new_object);                 \
+            ReadObject(space_number, &new_object);                             \
           } else if (where == kRootArray) {                                    \
             int root_id = source_->GetInt();                                   \
             new_object = isolate->heap()->roots_array_start()[root_id];        \
@@ -848,6 +749,9 @@ void Deserializer::ReadChunk(Object** current,
                 [cache_index];                                                 \
             emit_write_barrier = isolate->heap()->InNewSpace(new_object);      \
           } else if (where == kExternalReference) {                            \
+            int skip = source_->GetInt();                                      \
+            current = reinterpret_cast<Object**>(reinterpret_cast<Address>(    \
+                current) + skip);                                              \
             int reference_id = source_->GetInt();                              \
             Address address = external_reference_decoder_->                    \
                 Decode(reference_id);                                          \
@@ -856,15 +760,12 @@ void Deserializer::ReadChunk(Object** current,
             emit_write_barrier = (space_number == NEW_SPACE);                  \
             new_object = GetAddressFromEnd(data & kSpaceMask);                 \
           } else {                                                             \
-            ASSERT(where == kFromStart);                                       \
-            if (offset_from_start == kUnknownOffsetFromStart) {                \
-              emit_write_barrier = (space_number == NEW_SPACE);                \
-              new_object = GetAddressFromStart(data & kSpaceMask);             \
-            } else {                                                           \
-              Address object_address = pages_[space_number][0] +               \
-                  (offset_from_start << kObjectAlignmentBits);                 \
-              new_object = HeapObject::FromAddress(object_address);            \
-            }                                                                  \
+            ASSERT(where == kBackrefWithSkip);                                 \
+            int skip = source_->GetInt();                                      \
+            current = reinterpret_cast<Object**>(                              \
+                reinterpret_cast<Address>(current) + skip);                    \
+            emit_write_barrier = (space_number == NEW_SPACE);                  \
+            new_object = GetAddressFromEnd(data & kSpaceMask);                 \
           }                                                                    \
           if (within == kInnerPointer) {                                       \
             if (space_number != CODE_SPACE || new_object->IsCode()) {          \
@@ -872,7 +773,7 @@ void Deserializer::ReadChunk(Object** current,
               new_object = reinterpret_cast<Object*>(                          \
                   new_code_object->instruction_start());                       \
             } else {                                                           \
-              ASSERT(space_number == CODE_SPACE || space_number == kLargeCode);\
+              ASSERT(space_number == CODE_SPACE);                              \
               JSGlobalPropertyCell* cell =                                     \
                   JSGlobalPropertyCell::cast(new_object);                      \
               new_object = reinterpret_cast<Object*>(                          \
@@ -904,47 +805,18 @@ void Deserializer::ReadChunk(Object** current,
         break;                                                                 \
       }                                                                        \
 
-// This generates a case and a body for each space.  The large object spaces are
-// very rare in snapshots so they are grouped in one body.
-#define ONE_PER_SPACE(where, how, within)                                      \
-  CASE_STATEMENT(where, how, within, NEW_SPACE)                                \
-  CASE_BODY(where, how, within, NEW_SPACE, kUnknownOffsetFromStart)            \
-  CASE_STATEMENT(where, how, within, OLD_DATA_SPACE)                           \
-  CASE_BODY(where, how, within, OLD_DATA_SPACE, kUnknownOffsetFromStart)       \
-  CASE_STATEMENT(where, how, within, OLD_POINTER_SPACE)                        \
-  CASE_BODY(where, how, within, OLD_POINTER_SPACE, kUnknownOffsetFromStart)    \
-  CASE_STATEMENT(where, how, within, CODE_SPACE)                               \
-  CASE_BODY(where, how, within, CODE_SPACE, kUnknownOffsetFromStart)           \
-  CASE_STATEMENT(where, how, within, CELL_SPACE)                               \
-  CASE_BODY(where, how, within, CELL_SPACE, kUnknownOffsetFromStart)           \
-  CASE_STATEMENT(where, how, within, MAP_SPACE)                                \
-  CASE_BODY(where, how, within, MAP_SPACE, kUnknownOffsetFromStart)            \
-  CASE_STATEMENT(where, how, within, kLargeData)                               \
-  CASE_STATEMENT(where, how, within, kLargeCode)                               \
-  CASE_STATEMENT(where, how, within, kLargeFixedArray)                         \
-  CASE_BODY(where, how, within, kAnyOldSpace, kUnknownOffsetFromStart)
-
 // This generates a case and a body for the new space (which has to do extra
 // write barrier handling) and handles the other spaces with 8 fall-through
 // cases and one body.
 #define ALL_SPACES(where, how, within)                                         \
   CASE_STATEMENT(where, how, within, NEW_SPACE)                                \
-  CASE_BODY(where, how, within, NEW_SPACE, kUnknownOffsetFromStart)            \
+  CASE_BODY(where, how, within, NEW_SPACE)                                     \
   CASE_STATEMENT(where, how, within, OLD_DATA_SPACE)                           \
   CASE_STATEMENT(where, how, within, OLD_POINTER_SPACE)                        \
   CASE_STATEMENT(where, how, within, CODE_SPACE)                               \
   CASE_STATEMENT(where, how, within, CELL_SPACE)                               \
   CASE_STATEMENT(where, how, within, MAP_SPACE)                                \
-  CASE_STATEMENT(where, how, within, kLargeData)                               \
-  CASE_STATEMENT(where, how, within, kLargeCode)                               \
-  CASE_STATEMENT(where, how, within, kLargeFixedArray)                         \
-  CASE_BODY(where, how, within, kAnyOldSpace, kUnknownOffsetFromStart)
-
-#define ONE_PER_CODE_SPACE(where, how, within)                                 \
-  CASE_STATEMENT(where, how, within, CODE_SPACE)                               \
-  CASE_BODY(where, how, within, CODE_SPACE, kUnknownOffsetFromStart)           \
-  CASE_STATEMENT(where, how, within, kLargeCode)                               \
-  CASE_BODY(where, how, within, kLargeCode, kUnknownOffsetFromStart)
+  CASE_BODY(where, how, within, kAnyOldSpace)
 
 #define FOUR_CASES(byte_code)             \
   case byte_code:                         \
@@ -958,14 +830,48 @@ void Deserializer::ReadChunk(Object** current,
   FOUR_CASES(byte_code + 8)               \
   FOUR_CASES(byte_code + 12)
 
+#define COMMON_RAW_LENGTHS(f)        \
+  f(1)  \
+  f(2)  \
+  f(3)  \
+  f(4)  \
+  f(5)  \
+  f(6)  \
+  f(7)  \
+  f(8)  \
+  f(9)  \
+  f(10) \
+  f(11) \
+  f(12) \
+  f(13) \
+  f(14) \
+  f(15) \
+  f(16) \
+  f(17) \
+  f(18) \
+  f(19) \
+  f(20) \
+  f(21) \
+  f(22) \
+  f(23) \
+  f(24) \
+  f(25) \
+  f(26) \
+  f(27) \
+  f(28) \
+  f(29) \
+  f(30) \
+  f(31)
+
       // We generate 15 cases and bodies that process special tags that combine
       // the raw data tag and the length into one byte.
-#define RAW_CASE(index, size)                                      \
-      case kRawData + index: {                                     \
-        byte* raw_data_out = reinterpret_cast<byte*>(current);     \
-        source_->CopyRaw(raw_data_out, size);                      \
-        current = reinterpret_cast<Object**>(raw_data_out + size); \
-        break;                                                     \
+#define RAW_CASE(index)                                                      \
+      case kRawData + index: {                                               \
+        byte* raw_data_out = reinterpret_cast<byte*>(current);               \
+        source_->CopyRaw(raw_data_out, index * kPointerSize);                \
+        current =                                                            \
+            reinterpret_cast<Object**>(raw_data_out + index * kPointerSize); \
+        break;                                                               \
       }
       COMMON_RAW_LENGTHS(RAW_CASE)
 #undef RAW_CASE
@@ -976,13 +882,24 @@ void Deserializer::ReadChunk(Object** current,
         int size = source_->GetInt();
         byte* raw_data_out = reinterpret_cast<byte*>(current);
         source_->CopyRaw(raw_data_out, size);
-        current = reinterpret_cast<Object**>(raw_data_out + size);
         break;
       }
 
-      SIXTEEN_CASES(kRootArrayLowConstants)
-      SIXTEEN_CASES(kRootArrayHighConstants) {
+      SIXTEEN_CASES(kRootArrayConstants + kNoSkipDistance)
+      SIXTEEN_CASES(kRootArrayConstants + kNoSkipDistance + 16) {
+        int root_id = RootArrayConstantFromByteCode(data);
+        Object* object = isolate->heap()->roots_array_start()[root_id];
+        ASSERT(!isolate->heap()->InNewSpace(object));
+        *current++ = object;
+        break;
+      }
+
+      SIXTEEN_CASES(kRootArrayConstants + kHasSkipDistance)
+      SIXTEEN_CASES(kRootArrayConstants + kHasSkipDistance + 16) {
         int root_id = RootArrayConstantFromByteCode(data);
+        int skip = source_->GetInt();
+        current = reinterpret_cast<Object**>(
+            reinterpret_cast<intptr_t>(current) + skip);
         Object* object = isolate->heap()->roots_array_start()[root_id];
         ASSERT(!isolate->heap()->InNewSpace(object));
         *current++ = object;
@@ -1000,10 +917,11 @@ void Deserializer::ReadChunk(Object** current,
 
       STATIC_ASSERT(kRootArrayNumberOfConstantEncodings ==
                     Heap::kOldSpaceRoots);
-      STATIC_ASSERT(kMaxRepeats == 12);
-      FOUR_CASES(kConstantRepeat)
-      FOUR_CASES(kConstantRepeat + 4)
-      FOUR_CASES(kConstantRepeat + 8) {
+      STATIC_ASSERT(kMaxRepeats == 13);
+      case kConstantRepeat:
+      FOUR_CASES(kConstantRepeat + 1)
+      FOUR_CASES(kConstantRepeat + 5)
+      FOUR_CASES(kConstantRepeat + 9) {
         int repeats = RepeatsForCode(data);
         Object* object = current[-1];
         ASSERT(!isolate->heap()->InNewSpace(object));
@@ -1014,100 +932,80 @@ void Deserializer::ReadChunk(Object** current,
 
       // Deserialize a new object and write a pointer to it to the current
       // object.
-      ONE_PER_SPACE(kNewObject, kPlain, kStartOfObject)
+      ALL_SPACES(kNewObject, kPlain, kStartOfObject)
       // Support for direct instruction pointers in functions.  It's an inner
       // pointer because it points at the entry point, not at the start of the
       // code object.
-      ONE_PER_CODE_SPACE(kNewObject, kPlain, kInnerPointer)
+      CASE_STATEMENT(kNewObject, kPlain, kInnerPointer, CODE_SPACE)
+      CASE_BODY(kNewObject, kPlain, kInnerPointer, CODE_SPACE)
       // Deserialize a new code object and write a pointer to its first
       // instruction to the current code object.
-      ONE_PER_SPACE(kNewObject, kFromCode, kInnerPointer)
+      ALL_SPACES(kNewObject, kFromCode, kInnerPointer)
       // Find a recently deserialized object using its offset from the current
       // allocation point and write a pointer to it to the current object.
       ALL_SPACES(kBackref, kPlain, kStartOfObject)
+      ALL_SPACES(kBackrefWithSkip, kPlain, kStartOfObject)
 #if V8_TARGET_ARCH_MIPS
       // Deserialize a new object from pointer found in code and write
       // a pointer to it to the current object. Required only for MIPS, and
       // omitted on the other architectures because it is fully unrolled and
       // would cause bloat.
-      ONE_PER_SPACE(kNewObject, kFromCode, kStartOfObject)
+      ALL_SPACES(kNewObject, kFromCode, kStartOfObject)
       // Find a recently deserialized code object using its offset from the
       // current allocation point and write a pointer to it to the current
       // object. Required only for MIPS.
       ALL_SPACES(kBackref, kFromCode, kStartOfObject)
-      // Find an already deserialized code object using its offset from
-      // the start and write a pointer to it to the current object.
-      // Required only for MIPS.
-      ALL_SPACES(kFromStart, kFromCode, kStartOfObject)
+      ALL_SPACES(kBackrefWithSkip, kFromCode, kStartOfObject)
 #endif
       // Find a recently deserialized code object using its offset from the
       // current allocation point and write a pointer to its first instruction
       // to the current code object or the instruction pointer in a function
       // object.
       ALL_SPACES(kBackref, kFromCode, kInnerPointer)
+      ALL_SPACES(kBackrefWithSkip, kFromCode, kInnerPointer)
       ALL_SPACES(kBackref, kPlain, kInnerPointer)
-      // Find an already deserialized object using its offset from the start
-      // and write a pointer to it to the current object.
-      ALL_SPACES(kFromStart, kPlain, kStartOfObject)
-      ALL_SPACES(kFromStart, kPlain, kInnerPointer)
-      // Find an already deserialized code object using its offset from the
-      // start and write a pointer to its first instruction to the current code
-      // object.
-      ALL_SPACES(kFromStart, kFromCode, kInnerPointer)
+      ALL_SPACES(kBackrefWithSkip, kPlain, kInnerPointer)
       // Find an object in the roots array and write a pointer to it to the
       // current object.
       CASE_STATEMENT(kRootArray, kPlain, kStartOfObject, 0)
-      CASE_BODY(kRootArray, kPlain, kStartOfObject, 0, kUnknownOffsetFromStart)
+      CASE_BODY(kRootArray, kPlain, kStartOfObject, 0)
       // Find an object in the partial snapshots cache and write a pointer to it
       // to the current object.
       CASE_STATEMENT(kPartialSnapshotCache, kPlain, kStartOfObject, 0)
       CASE_BODY(kPartialSnapshotCache,
                 kPlain,
                 kStartOfObject,
-                0,
-                kUnknownOffsetFromStart)
+                0)
       // Find an code entry in the partial snapshots cache and
       // write a pointer to it to the current object.
       CASE_STATEMENT(kPartialSnapshotCache, kPlain, kInnerPointer, 0)
       CASE_BODY(kPartialSnapshotCache,
                 kPlain,
                 kInnerPointer,
-                0,
-                kUnknownOffsetFromStart)
+                0)
       // Find an external reference and write a pointer to it to the current
       // object.
       CASE_STATEMENT(kExternalReference, kPlain, kStartOfObject, 0)
       CASE_BODY(kExternalReference,
                 kPlain,
                 kStartOfObject,
-                0,
-                kUnknownOffsetFromStart)
+                0)
       // Find an external reference and write a pointer to it in the current
       // code object.
       CASE_STATEMENT(kExternalReference, kFromCode, kStartOfObject, 0)
       CASE_BODY(kExternalReference,
                 kFromCode,
                 kStartOfObject,
-                0,
-                kUnknownOffsetFromStart)
+                0)
 
 #undef CASE_STATEMENT
 #undef CASE_BODY
-#undef ONE_PER_SPACE
 #undef ALL_SPACES
-#undef ASSIGN_DEST_SPACE
-
-      case kNewPage: {
-        int space = source_->Get();
-        pages_[space].Add(last_object_address_);
-        if (space == CODE_SPACE) {
-          CPU::FlushICache(last_object_address_, Page::kPageSize);
-        }
-        break;
-      }
 
       case kSkip: {
-        current++;
+        int size = source_->GetInt();
+        current = reinterpret_cast<Object**>(
+            reinterpret_cast<intptr_t>(current) + size);
         break;
       }
 
@@ -1132,18 +1030,20 @@ void Deserializer::ReadChunk(Object** current,
         UNREACHABLE();
     }
   }
-  ASSERT_EQ(current, limit);
+  ASSERT_EQ(limit, current);
 }
 
 
 void SnapshotByteSink::PutInt(uintptr_t integer, const char* description) {
-  const int max_shift = ((kPointerSize * kBitsPerByte) / 7) * 7;
-  for (int shift = max_shift; shift > 0; shift -= 7) {
-    if (integer >= static_cast<uintptr_t>(1u) << shift) {
-      Put((static_cast<int>((integer >> shift)) & 0x7f) | 0x80, "IntPart");
-    }
-  }
-  PutSection(static_cast<int>(integer & 0x7f), "IntLastPart");
+  ASSERT(integer < 1 << 22);
+  integer <<= 2;
+  int bytes = 1;
+  if (integer > 0xff) bytes = 2;
+  if (integer > 0xffff) bytes = 3;
+  integer |= bytes;
+  Put(static_cast<int>(integer & 0xff), "IntPart1");
+  if (bytes > 1) Put(static_cast<int>((integer >> 8) & 0xff), "IntPart2");
+  if (bytes > 2) Put(static_cast<int>((integer >> 16) & 0xff), "IntPart3");
 }
 
 
@@ -1151,7 +1051,6 @@ Serializer::Serializer(SnapshotByteSink* sink)
     : sink_(sink),
       current_root_index_(0),
       external_reference_encoder_(new ExternalReferenceEncoder),
-      large_object_total_(0),
       root_index_wave_front_(0) {
   isolate_ = Isolate::Current();
   // The serializer is meant to be used only to generate initial heap images
@@ -1184,6 +1083,7 @@ void StartupSerializer::SerializeStrongReferences() {
 
 void PartialSerializer::Serialize(Object** object) {
   this->VisitPointer(object);
+  Pad();
 }
 
 
@@ -1198,14 +1098,14 @@ void Serializer::VisitPointers(Object** start, Object** end) {
     if (reinterpret_cast<Address>(current) ==
         isolate->heap()->store_buffer()->TopAddress()) {
       sink_->Put(kSkip, "Skip");
+      sink_->PutInt(kPointerSize, "SkipOneWord");
     } else if ((*current)->IsSmi()) {
-      sink_->Put(kRawData, "RawData");
-      sink_->PutInt(kPointerSize, "length");
+      sink_->Put(kRawData + 1, "Smi");
       for (int i = 0; i < kPointerSize; i++) {
         sink_->Put(reinterpret_cast<byte*>(current)[i], "Byte");
       }
     } else {
-      SerializeObject(*current, kPlain, kStartOfObject);
+      SerializeObject(*current, kPlain, kStartOfObject, 0);
     }
   }
 }
@@ -1292,58 +1192,50 @@ void Serializer::SerializeReferenceToPreviousObject(
     int space,
     int address,
     HowToCode how_to_code,
-    WhereToPoint where_to_point) {
+    WhereToPoint where_to_point,
+    int skip) {
   int offset = CurrentAllocationAddress(space) - address;
-  bool from_start = true;
-  if (SpaceIsPaged(space)) {
-    // For paged space it is simple to encode back from current allocation if
-    // the object is on the same page as the current allocation pointer.
-    if ((CurrentAllocationAddress(space) >> kPageSizeBits) ==
-        (address >> kPageSizeBits)) {
-      from_start = false;
-      address = offset;
-    }
-  } else if (space == NEW_SPACE) {
-    // For new space it is always simple to encode back from current allocation.
-    if (offset < address) {
-      from_start = false;
-      address = offset;
-    }
-  }
-  // If we are actually dealing with real offsets (and not a numbering of
-  // all objects) then we should shift out the bits that are always 0.
-  if (!SpaceIsLarge(space)) address >>= kObjectAlignmentBits;
-  if (from_start) {
-    sink_->Put(kFromStart + how_to_code + where_to_point + space, "RefSer");
-    sink_->PutInt(address, "address");
-  } else {
+  // Shift out the bits that are always 0.
+  offset >>= kObjectAlignmentBits;
+  if (skip == 0) {
     sink_->Put(kBackref + how_to_code + where_to_point + space, "BackRefSer");
-    sink_->PutInt(address, "address");
+  } else {
+    sink_->Put(kBackrefWithSkip + how_to_code + where_to_point + space,
+               "BackRefSerWithSkip");
+    sink_->PutInt(skip, "BackRefSkipDistance");
   }
+  sink_->PutInt(offset, "offset");
 }
 
 
 void StartupSerializer::SerializeObject(
     Object* o,
     HowToCode how_to_code,
-    WhereToPoint where_to_point) {
+    WhereToPoint where_to_point,
+    int skip) {
   CHECK(o->IsHeapObject());
   HeapObject* heap_object = HeapObject::cast(o);
 
   int root_index;
   if ((root_index = RootIndex(heap_object, how_to_code)) != kInvalidRootIndex) {
-    PutRoot(root_index, heap_object, how_to_code, where_to_point);
+    PutRoot(root_index, heap_object, how_to_code, where_to_point, skip);
     return;
   }
 
   if (address_mapper_.IsMapped(heap_object)) {
-    int space = SpaceOfAlreadySerializedObject(heap_object);
+    int space = SpaceOfObject(heap_object);
     int address = address_mapper_.MappedTo(heap_object);
     SerializeReferenceToPreviousObject(space,
                                        address,
                                        how_to_code,
-                                       where_to_point);
+                                       where_to_point,
+                                       skip);
   } else {
+    if (skip != 0) {
+      sink_->Put(kSkip, "FlushPendingSkip");
+      sink_->PutInt(skip, "SkipDistance");
+    }
+
     // Object has not yet been serialized.  Serialize it here.
     ObjectSerializer object_serializer(this,
                                        heap_object,
@@ -1365,25 +1257,32 @@ void StartupSerializer::SerializeWeakReferences() {
   Object* undefined = isolate->heap()->undefined_value();
   VisitPointer(&undefined);
   HEAP->IterateWeakRoots(this, VISIT_ALL);
+  Pad();
 }
 
 
 void Serializer::PutRoot(int root_index,
                          HeapObject* object,
                          SerializerDeserializer::HowToCode how_to_code,
-                         SerializerDeserializer::WhereToPoint where_to_point) {
+                         SerializerDeserializer::WhereToPoint where_to_point,
+                         int skip) {
   if (how_to_code == kPlain &&
       where_to_point == kStartOfObject &&
       root_index < kRootArrayNumberOfConstantEncodings &&
       !HEAP->InNewSpace(object)) {
-    if (root_index < kRootArrayNumberOfLowConstantEncodings) {
-      sink_->Put(kRootArrayLowConstants + root_index, "RootLoConstant");
+    if (skip == 0) {
+      sink_->Put(kRootArrayConstants + kNoSkipDistance + root_index,
+                 "RootConstant");
     } else {
-      sink_->Put(kRootArrayHighConstants + root_index -
-                     kRootArrayNumberOfLowConstantEncodings,
-                 "RootHiConstant");
+      sink_->Put(kRootArrayConstants + kHasSkipDistance + root_index,
+                 "RootConstant");
+      sink_->PutInt(skip, "SkipInPutRoot");
     }
   } else {
+    if (skip != 0) {
+      sink_->Put(kSkip, "SkipFromPutRoot");
+      sink_->PutInt(skip, "SkipFromPutRootDistance");
+    }
     sink_->Put(kRootArray + how_to_code + where_to_point, "RootSerialization");
     sink_->PutInt(root_index, "root_index");
   }
@@ -1393,7 +1292,8 @@ void Serializer::PutRoot(int root_index,
 void PartialSerializer::SerializeObject(
     Object* o,
     HowToCode how_to_code,
-    WhereToPoint where_to_point) {
+    WhereToPoint where_to_point,
+    int skip) {
   CHECK(o->IsHeapObject());
   HeapObject* heap_object = HeapObject::cast(o);
 
@@ -1401,16 +1301,21 @@ void PartialSerializer::SerializeObject(
     // The code-caches link to context-specific code objects, which
     // the startup and context serializes cannot currently handle.
     ASSERT(Map::cast(heap_object)->code_cache() ==
-           heap_object->GetHeap()->raw_unchecked_empty_fixed_array());
+           heap_object->GetHeap()->empty_fixed_array());
   }
 
   int root_index;
   if ((root_index = RootIndex(heap_object, how_to_code)) != kInvalidRootIndex) {
-    PutRoot(root_index, heap_object, how_to_code, where_to_point);
+    PutRoot(root_index, heap_object, how_to_code, where_to_point, skip);
     return;
   }
 
   if (ShouldBeInThePartialSnapshotCache(heap_object)) {
+    if (skip != 0) {
+      sink_->Put(kSkip, "SkipFromSerializeObject");
+      sink_->PutInt(skip, "SkipDistanceFromSerializeObject");
+    }
+
     int cache_index = PartialSnapshotCacheIndex(heap_object);
     sink_->Put(kPartialSnapshotCache + how_to_code + where_to_point,
                "PartialSnapshotCache");
@@ -1427,13 +1332,18 @@ void PartialSerializer::SerializeObject(
   ASSERT(!heap_object->IsSymbol());
 
   if (address_mapper_.IsMapped(heap_object)) {
-    int space = SpaceOfAlreadySerializedObject(heap_object);
+    int space = SpaceOfObject(heap_object);
     int address = address_mapper_.MappedTo(heap_object);
     SerializeReferenceToPreviousObject(space,
                                        address,
                                        how_to_code,
-                                       where_to_point);
+                                       where_to_point,
+                                       skip);
   } else {
+    if (skip != 0) {
+      sink_->Put(kSkip, "SkipFromSerializeObject");
+      sink_->PutInt(skip, "SkipDistanceFromSerializeObject");
+    }
     // Object has not yet been serialized.  Serialize it here.
     ObjectSerializer serializer(this,
                                 heap_object,
@@ -1457,16 +1367,11 @@ void Serializer::ObjectSerializer::Serialize() {
       SnapshotPositionEvent(object_->address(), sink_->Position()));
 
   // Mark this object as already serialized.
-  bool start_new_page;
-  int offset = serializer_->Allocate(space, size, &start_new_page);
+  int offset = serializer_->Allocate(space, size);
   serializer_->address_mapper()->AddMapping(object_, offset);
-  if (start_new_page) {
-    sink_->Put(kNewPage, "NewPage");
-    sink_->PutSection(space, "NewPageSpace");
-  }
 
   // Serialize the map (first word of the object).
-  serializer_->SerializeObject(object_->map(), kPlain, kStartOfObject);
+  serializer_->SerializeObject(object_->map(), kPlain, kStartOfObject, 0);
 
   // Serialize the rest of the object.
   CHECK_EQ(0, bytes_processed_so_far_);
@@ -1507,7 +1412,8 @@ void Serializer::ObjectSerializer::VisitPointers(Object** start,
           sink_->Put(CodeForRepeats(repeat_count), "SerializeRepeats");
         }
       } else {
-        serializer_->SerializeObject(current_contents, kPlain, kStartOfObject);
+        serializer_->SerializeObject(
+                current_contents, kPlain, kStartOfObject, 0);
         bytes_processed_so_far_ += kPointerSize;
         current++;
       }
@@ -1519,9 +1425,10 @@ void Serializer::ObjectSerializer::VisitPointers(Object** start,
 void Serializer::ObjectSerializer::VisitEmbeddedPointer(RelocInfo* rinfo) {
   Object** current = rinfo->target_object_address();
 
-  OutputRawData(rinfo->target_address_address());
+  int skip = OutputRawData(rinfo->target_address_address(),
+                           kCanReturnSkipInsteadOfSkipping);
   HowToCode representation = rinfo->IsCodedSpecially() ? kFromCode : kPlain;
-  serializer_->SerializeObject(*current, representation, kStartOfObject);
+  serializer_->SerializeObject(*current, representation, kStartOfObject, skip);
   bytes_processed_so_far_ += rinfo->target_address_size();
 }
 
@@ -1529,10 +1436,12 @@ void Serializer::ObjectSerializer::VisitEmbeddedPointer(RelocInfo* rinfo) {
 void Serializer::ObjectSerializer::VisitExternalReferences(Address* start,
                                                            Address* end) {
   Address references_start = reinterpret_cast<Address>(start);
-  OutputRawData(references_start);
+  int skip = OutputRawData(references_start, kCanReturnSkipInsteadOfSkipping);
 
   for (Address* current = start; current < end; current++) {
     sink_->Put(kExternalReference + kPlain + kStartOfObject, "ExternalRef");
+    sink_->PutInt(skip, "SkipB4ExternalRef");
+    skip = 0;
     int reference_id = serializer_->EncodeExternalReference(*current);
     sink_->PutInt(reference_id, "reference id");
   }
@@ -1542,12 +1451,13 @@ void Serializer::ObjectSerializer::VisitExternalReferences(Address* start,
 
 void Serializer::ObjectSerializer::VisitExternalReference(RelocInfo* rinfo) {
   Address references_start = rinfo->target_address_address();
-  OutputRawData(references_start);
+  int skip = OutputRawData(references_start, kCanReturnSkipInsteadOfSkipping);
 
   Address* current = rinfo->target_reference_address();
   int representation = rinfo->IsCodedSpecially() ?
                        kFromCode + kStartOfObject : kPlain + kStartOfObject;
   sink_->Put(kExternalReference + representation, "ExternalRef");
+  sink_->PutInt(skip, "SkipB4ExternalRef");
   int reference_id = serializer_->EncodeExternalReference(*current);
   sink_->PutInt(reference_id, "reference id");
   bytes_processed_so_far_ += rinfo->target_address_size();
@@ -1556,7 +1466,7 @@ void Serializer::ObjectSerializer::VisitExternalReference(RelocInfo* rinfo) {
 
 void Serializer::ObjectSerializer::VisitRuntimeEntry(RelocInfo* rinfo) {
   Address target_start = rinfo->target_address_address();
-  OutputRawData(target_start);
+  int skip = OutputRawData(target_start, kCanReturnSkipInsteadOfSkipping);
   Address target = rinfo->target_address();
   uint32_t encoding = serializer_->EncodeExternalReference(target);
   CHECK(target == NULL ? encoding == 0 : encoding != 0);
@@ -1568,6 +1478,7 @@ void Serializer::ObjectSerializer::VisitRuntimeEntry(RelocInfo* rinfo) {
     representation = kStartOfObject + kPlain;
   }
   sink_->Put(kExternalReference + representation, "ExternalReference");
+  sink_->PutInt(skip, "SkipB4ExternalRef");
   sink_->PutInt(encoding, "reference id");
   bytes_processed_so_far_ += rinfo->target_address_size();
 }
@@ -1576,17 +1487,17 @@ void Serializer::ObjectSerializer::VisitRuntimeEntry(RelocInfo* rinfo) {
 void Serializer::ObjectSerializer::VisitCodeTarget(RelocInfo* rinfo) {
   CHECK(RelocInfo::IsCodeTarget(rinfo->rmode()));
   Address target_start = rinfo->target_address_address();
-  OutputRawData(target_start);
+  int skip = OutputRawData(target_start, kCanReturnSkipInsteadOfSkipping);
   Code* target = Code::GetCodeFromTargetAddress(rinfo->target_address());
-  serializer_->SerializeObject(target, kFromCode, kInnerPointer);
+  serializer_->SerializeObject(target, kFromCode, kInnerPointer, skip);
   bytes_processed_so_far_ += rinfo->target_address_size();
 }
 
 
 void Serializer::ObjectSerializer::VisitCodeEntry(Address entry_address) {
   Code* target = Code::cast(Code::GetObjectFromEntryAddress(entry_address));
-  OutputRawData(entry_address);
-  serializer_->SerializeObject(target, kPlain, kInnerPointer);
+  int skip = OutputRawData(entry_address, kCanReturnSkipInsteadOfSkipping);
+  serializer_->SerializeObject(target, kPlain, kInnerPointer, skip);
   bytes_processed_so_far_ += kPointerSize;
 }
 
@@ -1595,8 +1506,8 @@ void Serializer::ObjectSerializer::VisitGlobalPropertyCell(RelocInfo* rinfo) {
   ASSERT(rinfo->rmode() == RelocInfo::GLOBAL_PROPERTY_CELL);
   JSGlobalPropertyCell* cell =
       JSGlobalPropertyCell::cast(rinfo->target_cell());
-  OutputRawData(rinfo->pc());
-  serializer_->SerializeObject(cell, kPlain, kInnerPointer);
+  int skip = OutputRawData(rinfo->pc(), kCanReturnSkipInsteadOfSkipping);
+  serializer_->SerializeObject(cell, kPlain, kInnerPointer, skip);
 }
 
 
@@ -1624,59 +1535,58 @@ void Serializer::ObjectSerializer::VisitExternalAsciiString(
 }
 
 
-void Serializer::ObjectSerializer::OutputRawData(Address up_to) {
+int Serializer::ObjectSerializer::OutputRawData(
+    Address up_to, Serializer::ObjectSerializer::ReturnSkip return_skip) {
   Address object_start = object_->address();
+  Address base = object_start + bytes_processed_so_far_;
   int up_to_offset = static_cast<int>(up_to - object_start);
-  int skipped = up_to_offset - bytes_processed_so_far_;
+  int to_skip = up_to_offset - bytes_processed_so_far_;
+  int bytes_to_output = to_skip;
+  bytes_processed_so_far_ +=  to_skip;
   // This assert will fail if the reloc info gives us the target_address_address
   // locations in a non-ascending order.  Luckily that doesn't happen.
-  ASSERT(skipped >= 0);
-  if (skipped != 0) {
-    Address base = object_start + bytes_processed_so_far_;
-#define RAW_CASE(index, length)                                                \
-    if (skipped == length) {                                                   \
+  ASSERT(to_skip >= 0);
+  bool outputting_code = false;
+  if (to_skip != 0 && code_object_ && !code_has_been_output_) {
+    // Output the code all at once and fix later.
+    bytes_to_output = object_->Size() + to_skip - bytes_processed_so_far_;
+    outputting_code = true;
+    code_has_been_output_ = true;
+  }
+  if (bytes_to_output != 0 &&
+      (!code_object_ || outputting_code)) {
+#define RAW_CASE(index)                                                        \
+    if (!outputting_code && bytes_to_output == index * kPointerSize &&         \
+        index * kPointerSize == to_skip) {                                     \
       sink_->PutSection(kRawData + index, "RawDataFixed");                     \
+      to_skip = 0;  /* This insn already skips. */                             \
     } else  /* NOLINT */
     COMMON_RAW_LENGTHS(RAW_CASE)
 #undef RAW_CASE
     {  /* NOLINT */
+      // We always end up here if we are outputting the code of a code object.
       sink_->Put(kRawData, "RawData");
-      sink_->PutInt(skipped, "length");
+      sink_->PutInt(bytes_to_output, "length");
     }
-    for (int i = 0; i < skipped; i++) {
+    for (int i = 0; i < bytes_to_output; i++) {
       unsigned int data = base[i];
       sink_->PutSection(data, "Byte");
     }
-    bytes_processed_so_far_ += skipped;
   }
-}
-
-
-int Serializer::SpaceOfObject(HeapObject* object) {
-  for (int i = FIRST_SPACE; i <= LAST_SPACE; i++) {
-    AllocationSpace s = static_cast<AllocationSpace>(i);
-    if (HEAP->InSpace(object, s)) {
-      if (i == LO_SPACE) {
-        if (object->IsCode()) {
-          return kLargeCode;
-        } else if (object->IsFixedArray()) {
-          return kLargeFixedArray;
-        } else {
-          return kLargeData;
-        }
-      }
-      return i;
-    }
+  if (to_skip != 0 && return_skip == kIgnoringReturn) {
+    sink_->Put(kSkip, "Skip");
+    sink_->PutInt(to_skip, "SkipDistance");
+    to_skip = 0;
   }
-  UNREACHABLE();
-  return 0;
+  return to_skip;
 }
 
 
-int Serializer::SpaceOfAlreadySerializedObject(HeapObject* object) {
+int Serializer::SpaceOfObject(HeapObject* object) {
   for (int i = FIRST_SPACE; i <= LAST_SPACE; i++) {
     AllocationSpace s = static_cast<AllocationSpace>(i);
     if (HEAP->InSpace(object, s)) {
+      ASSERT(i < kNumberOfSpaces);
       return i;
     }
   }
@@ -1685,34 +1595,8 @@ int Serializer::SpaceOfAlreadySerializedObject(HeapObject* object) {
 }
 
 
-int Serializer::Allocate(int space, int size, bool* new_page) {
+int Serializer::Allocate(int space, int size) {
   CHECK(space >= 0 && space < kNumberOfSpaces);
-  if (SpaceIsLarge(space)) {
-    // In large object space we merely number the objects instead of trying to
-    // determine some sort of address.
-    *new_page = true;
-    large_object_total_ += size;
-    return fullness_[LO_SPACE]++;
-  }
-  *new_page = false;
-  if (fullness_[space] == 0) {
-    *new_page = true;
-  }
-  if (SpaceIsPaged(space)) {
-    // Paged spaces are a little special.  We encode their addresses as if the
-    // pages were all contiguous and each page were filled up in the range
-    // 0 - Page::kObjectAreaSize.  In practice the pages may not be contiguous
-    // and allocation does not start at offset 0 in the page, but this scheme
-    // means the deserializer can get the page number quickly by shifting the
-    // serialized address.
-    CHECK(IsPowerOf2(Page::kPageSize));
-    int used_in_this_page = (fullness_[space] & (Page::kPageSize - 1));
-    CHECK(size <= SpaceAreaSize(space));
-    if (used_in_this_page + size > SpaceAreaSize(space)) {
-      *new_page = true;
-      fullness_[space] = RoundUp(fullness_[space], Page::kPageSize);
-    }
-  }
   int allocation_address = fullness_[space];
   fullness_[space] = allocation_address + size;
   return allocation_address;
@@ -1728,4 +1612,21 @@ int Serializer::SpaceAreaSize(int space) {
 }
 
 
+void Serializer::Pad() {
+  // The non-branching GetInt will read up to 3 bytes too far, so we need
+  // to pad the snapshot to make sure we don't read over the end.
+  for (unsigned i = 0; i < sizeof(int32_t) - 1; i++) {
+    sink_->Put(kNop, "Padding");
+  }
+}
+
+
+bool SnapshotByteSource::AtEOF() {
+  if (0u + length_ - position_ > 2 * sizeof(uint32_t)) return false;
+  for (int x = position_; x < length_; x++) {
+    if (data_[x] != SerializerDeserializer::nop()) return false;
+  }
+  return true;
+}
+
 } }  // namespace v8::internal
diff --git a/deps/v8/src/serialize.h b/deps/v8/src/serialize.h
index 8beb88e8b2..2041792856 100644
--- a/deps/v8/src/serialize.h
+++ b/deps/v8/src/serialize.h
@@ -170,13 +170,27 @@ class SnapshotByteSource {
     return data_[position_++];
   }
 
+  int32_t GetUnalignedInt() {
+#if defined(V8_HOST_CAN_READ_UNALIGNED) &&  __BYTE_ORDER == __LITTLE_ENDIAN
+    int32_t answer;
+    ASSERT(position_ + sizeof(answer) <= length_ + 0u);
+    answer = *reinterpret_cast<const int32_t*>(data_ + position_);
+#else
+    int32_t answer = data_[position_];
+    answer |= data_[position_ + 1] << 8;
+    answer |= data_[position_ + 2] << 16;
+    answer |= data_[position_ + 3] << 24;
+#endif
+    return answer;
+  }
+
+  void Advance(int by) { position_ += by; }
+
   inline void CopyRaw(byte* to, int number_of_bytes);
 
   inline int GetInt();
 
-  bool AtEOF() {
-    return position_ == length_;
-  }
+  bool AtEOF();
 
   int position() { return position_; }
 
@@ -187,23 +201,6 @@ class SnapshotByteSource {
 };
 
 
-#define COMMON_RAW_LENGTHS(f)        \
-  f(1, 1)  \
-  f(2, 2)  \
-  f(3, 3)  \
-  f(4, 4)  \
-  f(5, 5)  \
-  f(6, 6)  \
-  f(7, 7)  \
-  f(8, 8)  \
-  f(9, 12)  \
-  f(10, 16) \
-  f(11, 20) \
-  f(12, 24) \
-  f(13, 28) \
-  f(14, 32) \
-  f(15, 36)
-
 // The Serializer/Deserializer class is a common superclass for Serializer and
 // Deserializer which is used to store common constants and methods used by
 // both.
@@ -211,23 +208,24 @@ class SerializerDeserializer: public ObjectVisitor {
  public:
   static void Iterate(ObjectVisitor* visitor);
 
+  static int nop() { return kNop; }
+
  protected:
   // Where the pointed-to object can be found:
   enum Where {
     kNewObject = 0,                 // Object is next in snapshot.
-    // 1-8                             One per space.
+    // 1-6                             One per space.
     kRootArray = 0x9,               // Object is found in root array.
     kPartialSnapshotCache = 0xa,    // Object is in the cache.
     kExternalReference = 0xb,       // Pointer to an external reference.
-    kSkip = 0xc,                    // Skip a pointer sized cell.
-    // 0xd-0xf                         Free.
-    kBackref = 0x10,                 // Object is described relative to end.
-    // 0x11-0x18                       One per space.
-    // 0x19-0x1f                       Free.
-    kFromStart = 0x20,              // Object is described relative to start.
-    // 0x21-0x28                       One per space.
-    // 0x29-0x2f                       Free.
-    // 0x30-0x3f                       Used by misc. tags below.
+    kSkip = 0xc,                    // Skip n bytes.
+    kNop = 0xd,                     // Does nothing, used to pad.
+    // 0xe-0xf                         Free.
+    kBackref = 0x10,                // Object is described relative to end.
+    // 0x11-0x16                       One per space.
+    kBackrefWithSkip = 0x18,        // Object is described relative to end.
+    // 0x19-0x1e                       One per space.
+    // 0x20-0x3f                       Used by misc. tags below.
     kPointedToMask = 0x3f
   };
 
@@ -239,6 +237,13 @@ class SerializerDeserializer: public ObjectVisitor {
     kHowToCodeMask = 0x40
   };
 
+  // For kRootArrayConstants
+  enum WithSkip {
+    kNoSkipDistance = 0,
+    kHasSkipDistance = 0x40,
+    kWithSkipMask = 0x40
+  };
+
   // Where to point within the object.
   enum WhereToPoint {
     kStartOfObject = 0,
@@ -247,9 +252,12 @@ class SerializerDeserializer: public ObjectVisitor {
   };
 
   // Misc.
-  // Raw data to be copied from the snapshot.
-  static const int kRawData = 0x30;
-  // Some common raw lengths: 0x31-0x3f
+  // Raw data to be copied from the snapshot.  This byte code does not advance
+  // the current pointer, which is used for code objects, where we write the
+  // entire code in one memcpy, then fix up stuff with kSkip and other byte
+  // codes that overwrite data.
+  static const int kRawData = 0x20;
+  // Some common raw lengths: 0x21-0x3f.  These autoadvance the current pointer.
   // A tag emitted at strategic points in the snapshot to delineate sections.
   // If the deserializer does not find these at the expected moments then it
   // is an indication that the snapshot and the VM do not fit together.
@@ -259,64 +267,44 @@ class SerializerDeserializer: public ObjectVisitor {
   // Used for the source code of the natives, which is in the executable, but
   // is referred to from external strings in the snapshot.
   static const int kNativesStringResource = 0x71;
-  static const int kNewPage = 0x72;
-  static const int kRepeat = 0x73;
-  static const int kConstantRepeat = 0x74;
-  // 0x74-0x7f            Repeat last word (subtract 0x73 to get the count).
-  static const int kMaxRepeats = 0x7f - 0x73;
+  static const int kRepeat = 0x72;
+  static const int kConstantRepeat = 0x73;
+  // 0x73-0x7f            Repeat last word (subtract 0x72 to get the count).
+  static const int kMaxRepeats = 0x7f - 0x72;
   static int CodeForRepeats(int repeats) {
     ASSERT(repeats >= 1 && repeats <= kMaxRepeats);
-    return 0x73 + repeats;
+    return 0x72 + repeats;
   }
   static int RepeatsForCode(int byte_code) {
     ASSERT(byte_code >= kConstantRepeat && byte_code <= 0x7f);
-    return byte_code - 0x73;
+    return byte_code - 0x72;
   }
-  static const int kRootArrayLowConstants = 0xb0;
-  // 0xb0-0xbf            Things from the first 16 elements of the root array.
-  static const int kRootArrayHighConstants = 0xf0;
-  // 0xf0-0xff            Things from the next 16 elements of the root array.
+  static const int kRootArrayConstants = 0xa0;
+  // 0xa0-0xbf            Things from the first 32 elements of the root array.
   static const int kRootArrayNumberOfConstantEncodings = 0x20;
-  static const int kRootArrayNumberOfLowConstantEncodings = 0x10;
   static int RootArrayConstantFromByteCode(int byte_code) {
-    int constant = (byte_code & 0xf) | ((byte_code & 0x40) >> 2);
-    ASSERT(constant >= 0 && constant < kRootArrayNumberOfConstantEncodings);
-    return constant;
+    return byte_code & 0x1f;
   }
 
-
-  static const int kLargeData = LAST_SPACE;
-  static const int kLargeCode = kLargeData + 1;
-  static const int kLargeFixedArray = kLargeCode + 1;
-  static const int kNumberOfSpaces = kLargeFixedArray + 1;
+  static const int kNumberOfSpaces = LO_SPACE;
   static const int kAnyOldSpace = -1;
 
   // A bitmask for getting the space out of an instruction.
-  static const int kSpaceMask = 15;
-
-  static inline bool SpaceIsLarge(int space) { return space >= kLargeData; }
-  static inline bool SpaceIsPaged(int space) {
-    return space >= FIRST_PAGED_SPACE && space <= LAST_PAGED_SPACE;
-  }
+  static const int kSpaceMask = 7;
 };
 
 
 int SnapshotByteSource::GetInt() {
-  // A little unwind to catch the really small ints.
-  int snapshot_byte = Get();
-  if ((snapshot_byte & 0x80) == 0) {
-    return snapshot_byte;
-  }
-  int accumulator = (snapshot_byte & 0x7f) << 7;
-  while (true) {
-    snapshot_byte = Get();
-    if ((snapshot_byte & 0x80) == 0) {
-      return accumulator | snapshot_byte;
-    }
-    accumulator = (accumulator | (snapshot_byte & 0x7f)) << 7;
-  }
-  UNREACHABLE();
-  return accumulator;
+  // This way of variable-length encoding integers does not suffer from branch
+  // mispredictions.
+  uint32_t answer = GetUnalignedInt();
+  int bytes = answer & 3;
+  Advance(bytes);
+  uint32_t mask = 0xffffffffu;
+  mask >>= 32 - (bytes << 3);
+  answer &= mask;
+  answer >>= 2;
+  return answer;
 }
 
 
@@ -340,6 +328,12 @@ class Deserializer: public SerializerDeserializer {
   // Deserialize a single object and the objects reachable from it.
   void DeserializePartial(Object** root);
 
+  void set_reservation(int space_number, int reservation) {
+    ASSERT(space_number >= 0);
+    ASSERT(space_number <= LAST_SPACE);
+    reservations_[space_number] = reservation;
+  }
+
  private:
   virtual void VisitPointers(Object** start, Object** end);
 
@@ -358,28 +352,36 @@ class Deserializer: public SerializerDeserializer {
   // the heap.
   void ReadChunk(
       Object** start, Object** end, int space, Address object_address);
-  HeapObject* GetAddressFromStart(int space);
-  inline HeapObject* GetAddressFromEnd(int space);
-  Address Allocate(int space_number, Space* space, int size);
-  void ReadObject(int space_number, Space* space, Object** write_back);
+  void ReadObject(int space_number, Object** write_back);
+
+  // This routine both allocates a new object, and also keeps
+  // track of where objects have been allocated so that we can
+  // fix back references when deserializing.
+  Address Allocate(int space_index, int size) {
+    Address address = high_water_[space_index];
+    high_water_[space_index] = address + size;
+    return address;
+  }
+
+  // This returns the address of an object that has been described in the
+  // snapshot as being offset bytes back in a particular space.
+  HeapObject* GetAddressFromEnd(int space) {
+    int offset = source_->GetInt();
+    offset <<= kObjectAlignmentBits;
+    return HeapObject::FromAddress(high_water_[space] - offset);
+  }
+
 
   // Cached current isolate.
   Isolate* isolate_;
 
-  // Keep track of the pages in the paged spaces.
-  // (In large object space we are keeping track of individual objects
-  // rather than pages.)  In new space we just need the address of the
-  // first object and the others will flow from that.
-  List<Address> pages_[SerializerDeserializer::kNumberOfSpaces];
-
   SnapshotByteSource* source_;
   // This is the address of the next object that will be allocated in each
   // space.  It is used to calculate the addresses of back-references.
   Address high_water_[LAST_SPACE + 1];
-  // This is the address of the most recent object that was allocated.  It
-  // is used to set the location of the new page when we encounter a
-  // START_NEW_PAGE_SERIALIZATION tag.
-  Address last_object_address_;
+
+  int reservations_[LAST_SPACE + 1];
+  static const intptr_t kUninitializedReservation = -1;
 
   ExternalReferenceDecoder* external_reference_decoder_;
 
@@ -461,7 +463,7 @@ class Serializer : public SerializerDeserializer {
   // You can call this after serialization to find out how much space was used
   // in each space.
   int CurrentAllocationAddress(int space) {
-    if (SpaceIsLarge(space)) return large_object_total_;
+    ASSERT(space < kNumberOfSpaces);
     return fullness_[space];
   }
 
@@ -478,8 +480,11 @@ class Serializer : public SerializerDeserializer {
   static void TooLateToEnableNow() { too_late_to_enable_now_ = true; }
   static bool enabled() { return serialization_enabled_; }
   SerializationAddressMapper* address_mapper() { return &address_mapper_; }
-  void PutRoot(
-      int index, HeapObject* object, HowToCode how, WhereToPoint where);
+  void PutRoot(int index,
+               HeapObject* object,
+               HowToCode how,
+               WhereToPoint where,
+               int skip);
 
  protected:
   static const int kInvalidRootIndex = -1;
@@ -503,7 +508,9 @@ class Serializer : public SerializerDeserializer {
         object_(HeapObject::cast(o)),
         sink_(sink),
         reference_representation_(how_to_code + where_to_point),
-        bytes_processed_so_far_(0) { }
+        bytes_processed_so_far_(0),
+        code_object_(o->IsCode()),
+        code_has_been_output_(false) { }
     void Serialize();
     void VisitPointers(Object** start, Object** end);
     void VisitEmbeddedPointer(RelocInfo* target);
@@ -523,34 +530,36 @@ class Serializer : public SerializerDeserializer {
     }
 
    private:
-    void OutputRawData(Address up_to);
+    enum ReturnSkip { kCanReturnSkipInsteadOfSkipping, kIgnoringReturn };
+    // This function outputs or skips the raw data between the last pointer and
+    // up to the current position.  It optionally can just return the number of
+    // bytes to skip instead of performing a skip instruction, in case the skip
+    // can be merged into the next instruction.
+    int OutputRawData(Address up_to, ReturnSkip return_skip = kIgnoringReturn);
 
     Serializer* serializer_;
     HeapObject* object_;
     SnapshotByteSink* sink_;
     int reference_representation_;
     int bytes_processed_so_far_;
+    bool code_object_;
+    bool code_has_been_output_;
   };
 
   virtual void SerializeObject(Object* o,
                                HowToCode how_to_code,
-                               WhereToPoint where_to_point) = 0;
+                               WhereToPoint where_to_point,
+                               int skip) = 0;
   void SerializeReferenceToPreviousObject(
       int space,
       int address,
       HowToCode how_to_code,
-      WhereToPoint where_to_point);
+      WhereToPoint where_to_point,
+      int skip);
   void InitializeAllocators();
-  // This will return the space for an object.  If the object is in large
-  // object space it may return kLargeCode or kLargeFixedArray in order
-  // to indicate to the deserializer what kind of large object allocation
-  // to make.
+  // This will return the space for an object.
   static int SpaceOfObject(HeapObject* object);
-  // This just returns the space of the object.  It will return LO_SPACE
-  // for all large objects since you can't check the type of the object
-  // once the map has been used for the serialization address.
-  static int SpaceOfAlreadySerializedObject(HeapObject* object);
-  int Allocate(int space, int size, bool* new_page_started);
+  int Allocate(int space, int size);
   int EncodeExternalReference(Address addr) {
     return external_reference_encoder_->Encode(addr);
   }
@@ -559,9 +568,7 @@ class Serializer : public SerializerDeserializer {
 
   Isolate* isolate_;
   // Keep track of the fullness of each space in order to generate
-  // relative addresses for back references.  Large objects are
-  // just numbered sequentially since relative addresses make no
-  // sense in large object space.
+  // relative addresses for back references.
   int fullness_[LAST_SPACE + 1];
   SnapshotByteSink* sink_;
   int current_root_index_;
@@ -569,9 +576,9 @@ class Serializer : public SerializerDeserializer {
   static bool serialization_enabled_;
   // Did we already make use of the fact that serialization was not enabled?
   static bool too_late_to_enable_now_;
-  int large_object_total_;
   SerializationAddressMapper address_mapper_;
   intptr_t root_index_wave_front_;
+  void Pad();
 
   friend class ObjectSerializer;
   friend class Deserializer;
@@ -594,7 +601,8 @@ class PartialSerializer : public Serializer {
   virtual void Serialize(Object** o);
   virtual void SerializeObject(Object* o,
                                HowToCode how_to_code,
-                               WhereToPoint where_to_point);
+                               WhereToPoint where_to_point,
+                               int skip);
 
  protected:
   virtual int PartialSnapshotCacheIndex(HeapObject* o);
@@ -632,11 +640,13 @@ class StartupSerializer : public Serializer {
   virtual void SerializeStrongReferences();
   virtual void SerializeObject(Object* o,
                                HowToCode how_to_code,
-                               WhereToPoint where_to_point);
+                               WhereToPoint where_to_point,
+                               int skip);
   void SerializeWeakReferences();
   void Serialize() {
     SerializeStrongReferences();
     SerializeWeakReferences();
+    Pad();
   }
 
  private:
diff --git a/deps/v8/src/snapshot-common.cc b/deps/v8/src/snapshot-common.cc
index 3a4ac70edf..a8806f053f 100644
--- a/deps/v8/src/snapshot-common.cc
+++ b/deps/v8/src/snapshot-common.cc
@@ -37,10 +37,47 @@
 namespace v8 {
 namespace internal {
 
-bool Snapshot::Deserialize(const byte* content, int len) {
-  SnapshotByteSource source(content, len);
-  Deserializer deserializer(&source);
-  return V8::Initialize(&deserializer);
+
+static void ReserveSpaceForSnapshot(Deserializer* deserializer,
+                                    const char* file_name) {
+  int file_name_length = StrLength(file_name) + 10;
+  Vector<char> name = Vector<char>::New(file_name_length + 1);
+  OS::SNPrintF(name, "%s.size", file_name);
+  FILE* fp = OS::FOpen(name.start(), "r");
+  CHECK_NE(NULL, fp);
+  int new_size, pointer_size, data_size, code_size, map_size, cell_size;
+#ifdef _MSC_VER
+  // Avoid warning about unsafe fscanf from MSVC.
+  // Please note that this is only fine if %c and %s are not being used.
+#define fscanf fscanf_s
+#endif
+  CHECK_EQ(1, fscanf(fp, "new %d\n", &new_size));
+  CHECK_EQ(1, fscanf(fp, "pointer %d\n", &pointer_size));
+  CHECK_EQ(1, fscanf(fp, "data %d\n", &data_size));
+  CHECK_EQ(1, fscanf(fp, "code %d\n", &code_size));
+  CHECK_EQ(1, fscanf(fp, "map %d\n", &map_size));
+  CHECK_EQ(1, fscanf(fp, "cell %d\n", &cell_size));
+#ifdef _MSC_VER
+#undef fscanf
+#endif
+  fclose(fp);
+  deserializer->set_reservation(NEW_SPACE, new_size);
+  deserializer->set_reservation(OLD_POINTER_SPACE, pointer_size);
+  deserializer->set_reservation(OLD_DATA_SPACE, data_size);
+  deserializer->set_reservation(CODE_SPACE, code_size);
+  deserializer->set_reservation(MAP_SPACE, map_size);
+  deserializer->set_reservation(CELL_SPACE, cell_size);
+  name.Dispose();
+}
+
+
+void Snapshot::ReserveSpaceForLinkedInSnapshot(Deserializer* deserializer) {
+  deserializer->set_reservation(NEW_SPACE, new_space_used_);
+  deserializer->set_reservation(OLD_POINTER_SPACE, pointer_space_used_);
+  deserializer->set_reservation(OLD_DATA_SPACE, data_space_used_);
+  deserializer->set_reservation(CODE_SPACE, code_space_used_);
+  deserializer->set_reservation(MAP_SPACE, map_space_used_);
+  deserializer->set_reservation(CELL_SPACE, cell_space_used_);
 }
 
 
@@ -49,12 +86,20 @@ bool Snapshot::Initialize(const char* snapshot_file) {
     int len;
     byte* str = ReadBytes(snapshot_file, &len);
     if (!str) return false;
-    Deserialize(str, len);
+    bool success;
+    {
+      SnapshotByteSource source(str, len);
+      Deserializer deserializer(&source);
+      ReserveSpaceForSnapshot(&deserializer, snapshot_file);
+      success = V8::Initialize(&deserializer);
+    }
     DeleteArray(str);
-    return true;
+    return success;
   } else if (size_ > 0) {
-    Deserialize(raw_data_, raw_size_);
-    return true;
+    SnapshotByteSource source(raw_data_, raw_size_);
+    Deserializer deserializer(&source);
+    ReserveSpaceForLinkedInSnapshot(&deserializer);
+    return V8::Initialize(&deserializer);
   }
   return false;
 }
@@ -69,17 +114,16 @@ Handle<Context> Snapshot::NewContextFromSnapshot() {
   if (context_size_ == 0) {
     return Handle<Context>();
   }
-  HEAP->ReserveSpace(new_space_used_,
-                     pointer_space_used_,
-                     data_space_used_,
-                     code_space_used_,
-                     map_space_used_,
-                     cell_space_used_,
-                     large_space_used_);
   SnapshotByteSource source(context_raw_data_,
                             context_raw_size_);
   Deserializer deserializer(&source);
   Object* root;
+  deserializer.set_reservation(NEW_SPACE, context_new_space_used_);
+  deserializer.set_reservation(OLD_POINTER_SPACE, context_pointer_space_used_);
+  deserializer.set_reservation(OLD_DATA_SPACE, context_data_space_used_);
+  deserializer.set_reservation(CODE_SPACE, context_code_space_used_);
+  deserializer.set_reservation(MAP_SPACE, context_map_space_used_);
+  deserializer.set_reservation(CELL_SPACE, context_cell_space_used_);
   deserializer.DeserializePartial(&root);
   CHECK(root->IsContext());
   return Handle<Context>(Context::cast(root));
diff --git a/deps/v8/src/snapshot-empty.cc b/deps/v8/src/snapshot-empty.cc
index 0b35720cce..70e7ab815c 100644
--- a/deps/v8/src/snapshot-empty.cc
+++ b/deps/v8/src/snapshot-empty.cc
@@ -49,6 +49,12 @@ const int Snapshot::data_space_used_ = 0;
 const int Snapshot::code_space_used_ = 0;
 const int Snapshot::map_space_used_ = 0;
 const int Snapshot::cell_space_used_ = 0;
-const int Snapshot::large_space_used_ = 0;
+
+const int Snapshot::context_new_space_used_ = 0;
+const int Snapshot::context_pointer_space_used_ = 0;
+const int Snapshot::context_data_space_used_ = 0;
+const int Snapshot::context_code_space_used_ = 0;
+const int Snapshot::context_map_space_used_ = 0;
+const int Snapshot::context_cell_space_used_ = 0;
 
 } }  // namespace v8::internal
diff --git a/deps/v8/src/snapshot.h b/deps/v8/src/snapshot.h
index ab4529e517..c4ae45eee0 100644
--- a/deps/v8/src/snapshot.h
+++ b/deps/v8/src/snapshot.h
@@ -77,13 +77,18 @@ class Snapshot {
   static const int code_space_used_;
   static const int map_space_used_;
   static const int cell_space_used_;
-  static const int large_space_used_;
+  static const int context_new_space_used_;
+  static const int context_pointer_space_used_;
+  static const int context_data_space_used_;
+  static const int context_code_space_used_;
+  static const int context_map_space_used_;
+  static const int context_cell_space_used_;
   static const int size_;
   static const int raw_size_;
   static const int context_size_;
   static const int context_raw_size_;
 
-  static bool Deserialize(const byte* content, int len);
+  static void ReserveSpaceForLinkedInSnapshot(Deserializer* deserializer);
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(Snapshot);
 };
diff --git a/deps/v8/src/spaces-inl.h b/deps/v8/src/spaces-inl.h
index ed78fc7a15..8a576a83f6 100644
--- a/deps/v8/src/spaces-inl.h
+++ b/deps/v8/src/spaces-inl.h
@@ -214,6 +214,19 @@ MemoryChunk* MemoryChunk::FromAnyPointerAddress(Address addr) {
 }
 
 
+void MemoryChunk::UpdateHighWaterMark(Address mark) {
+  if (mark == NULL) return;
+  // Need to subtract one from the mark because when a chunk is full the
+  // top points to the next address after the chunk, which effectively belongs
+  // to another chunk. See the comment to Page::FromAllocationTop.
+  MemoryChunk* chunk = MemoryChunk::FromAddress(mark - 1);
+  int new_mark = static_cast<int>(mark - chunk->address());
+  if (new_mark > chunk->high_water_mark_) {
+    chunk->high_water_mark_ = new_mark;
+  }
+}
+
+
 PointerChunkIterator::PointerChunkIterator(Heap* heap)
     : state_(kOldPointerState),
       old_pointer_iterator_(heap->old_pointer_space()),
@@ -269,6 +282,10 @@ MaybeObject* PagedSpace::AllocateRaw(int size_in_bytes) {
     return object;
   }
 
+  ASSERT(!heap()->linear_allocation() ||
+         (anchor_.next_chunk() == &anchor_ &&
+          anchor_.prev_chunk() == &anchor_));
+
   object = free_list_.Allocate(size_in_bytes);
   if (object != NULL) {
     if (identity() == CODE_SPACE) {
diff --git a/deps/v8/src/spaces.cc b/deps/v8/src/spaces.cc
index 62873fa1cf..cacd969150 100644
--- a/deps/v8/src/spaces.cc
+++ b/deps/v8/src/spaces.cc
@@ -447,6 +447,9 @@ MemoryChunk* MemoryChunk::Initialize(Heap* heap,
   chunk->InitializeReservedMemory();
   chunk->slots_buffer_ = NULL;
   chunk->skip_list_ = NULL;
+  chunk->write_barrier_counter_ = kWriteBarrierCounterGranularity;
+  chunk->progress_bar_ = 0;
+  chunk->high_water_mark_ = static_cast<int>(area_start - base);
   chunk->ResetLiveBytes();
   Bitmap::Clear(chunk);
   chunk->initialize_scan_on_scavenge(false);
@@ -496,6 +499,7 @@ MemoryChunk* MemoryAllocator::AllocateChunk(intptr_t body_size,
   VirtualMemory reservation;
   Address area_start = NULL;
   Address area_end = NULL;
+
   if (executable == EXECUTABLE) {
     chunk_size = RoundUp(CodePageAreaStartOffset() + body_size,
                          OS::CommitPageSize()) + CodePageGuardSize();
@@ -528,10 +532,11 @@ MemoryChunk* MemoryAllocator::AllocateChunk(intptr_t body_size,
       size_executable_ += reservation.size();
     }
 
-#ifdef DEBUG
-    ZapBlock(base, CodePageGuardStartOffset());
-    ZapBlock(base + CodePageAreaStartOffset(), body_size);
-#endif
+    if (Heap::ShouldZapGarbage()) {
+      ZapBlock(base, CodePageGuardStartOffset());
+      ZapBlock(base + CodePageAreaStartOffset(), body_size);
+    }
+
     area_start = base + CodePageAreaStartOffset();
     area_end = area_start + body_size;
   } else {
@@ -543,9 +548,9 @@ MemoryChunk* MemoryAllocator::AllocateChunk(intptr_t body_size,
 
     if (base == NULL) return NULL;
 
-#ifdef DEBUG
-    ZapBlock(base, chunk_size);
-#endif
+    if (Heap::ShouldZapGarbage()) {
+      ZapBlock(base, chunk_size);
+    }
 
     area_start = base + Page::kObjectStartOffset;
     area_end = base + chunk_size;
@@ -621,9 +626,11 @@ bool MemoryAllocator::CommitBlock(Address start,
                                   size_t size,
                                   Executability executable) {
   if (!VirtualMemory::CommitRegion(start, size, executable)) return false;
-#ifdef DEBUG
-  ZapBlock(start, size);
-#endif
+
+  if (Heap::ShouldZapGarbage()) {
+    ZapBlock(start, size);
+  }
+
   isolate_->counters()->memory_allocated()->Increment(static_cast<int>(size));
   return true;
 }
@@ -819,6 +826,18 @@ void PagedSpace::TearDown() {
 }
 
 
+size_t PagedSpace::CommittedPhysicalMemory() {
+  if (!VirtualMemory::HasLazyCommits()) return CommittedMemory();
+  MemoryChunk::UpdateHighWaterMark(allocation_info_.top);
+  size_t size = 0;
+  PageIterator it(this);
+  while (it.has_next()) {
+    size += it.next()->CommittedPhysicalMemory();
+  }
+  return size;
+}
+
+
 MaybeObject* PagedSpace::FindObject(Address addr) {
   // Note: this function can only be called on precisely swept spaces.
   ASSERT(!heap()->mark_compact_collector()->in_use());
@@ -881,10 +900,10 @@ intptr_t PagedSpace::SizeOfFirstPage() {
       size = 192 * KB;
       break;
     case MAP_SPACE:
-      size = 128 * KB;
+      size = 16 * kPointerSize * KB;
       break;
     case CELL_SPACE:
-      size = 96 * KB;
+      size = 16 * kPointerSize * KB;
       break;
     case CODE_SPACE:
       if (kPointerSize == 8) {
@@ -984,8 +1003,7 @@ void PagedSpace::ReleaseAllUnusedPages() {
 void PagedSpace::Print() { }
 #endif
 
-
-#ifdef DEBUG
+#ifdef VERIFY_HEAP
 void PagedSpace::Verify(ObjectVisitor* visitor) {
   // We can only iterate over the pages if they were swept precisely.
   if (was_swept_conservatively_) return;
@@ -995,23 +1013,23 @@ void PagedSpace::Verify(ObjectVisitor* visitor) {
   PageIterator page_iterator(this);
   while (page_iterator.has_next()) {
     Page* page = page_iterator.next();
-    ASSERT(page->owner() == this);
+    CHECK(page->owner() == this);
     if (page == Page::FromAllocationTop(allocation_info_.top)) {
       allocation_pointer_found_in_space = true;
     }
-    ASSERT(page->WasSweptPrecisely());
+    CHECK(page->WasSweptPrecisely());
     HeapObjectIterator it(page, NULL);
     Address end_of_previous_object = page->area_start();
     Address top = page->area_end();
     int black_size = 0;
     for (HeapObject* object = it.Next(); object != NULL; object = it.Next()) {
-      ASSERT(end_of_previous_object <= object->address());
+      CHECK(end_of_previous_object <= object->address());
 
       // The first word should be a map, and we expect all map pointers to
       // be in map space.
       Map* map = object->map();
-      ASSERT(map->IsMap());
-      ASSERT(heap()->map_space()->Contains(map));
+      CHECK(map->IsMap());
+      CHECK(heap()->map_space()->Contains(map));
 
       // Perform space-specific object verification.
       VerifyObject(object);
@@ -1026,15 +1044,14 @@ void PagedSpace::Verify(ObjectVisitor* visitor) {
         black_size += size;
       }
 
-      ASSERT(object->address() + size <= top);
+      CHECK(object->address() + size <= top);
       end_of_previous_object = object->address() + size;
     }
-    ASSERT_LE(black_size, page->LiveBytes());
+    CHECK_LE(black_size, page->LiveBytes());
   }
-  ASSERT(allocation_pointer_found_in_space);
+  CHECK(allocation_pointer_found_in_space);
 }
-#endif
-
+#endif  // VERIFY_HEAP
 
 // -----------------------------------------------------------------------------
 // NewSpace implementation
@@ -1172,6 +1189,7 @@ void NewSpace::Shrink() {
 
 
 void NewSpace::UpdateAllocationInfo() {
+  MemoryChunk::UpdateHighWaterMark(allocation_info_.top);
   allocation_info_.top = to_space_.page_low();
   allocation_info_.limit = to_space_.page_high();
 
@@ -1258,7 +1276,7 @@ MaybeObject* NewSpace::SlowAllocateRaw(int size_in_bytes) {
 }
 
 
-#ifdef DEBUG
+#ifdef VERIFY_HEAP
 // We do not use the SemiSpaceIterator because verification doesn't assume
 // that it works (it depends on the invariants we are checking).
 void NewSpace::Verify() {
@@ -1307,8 +1325,8 @@ void NewSpace::Verify() {
   }
 
   // Check semi-spaces.
-  ASSERT_EQ(from_space_.id(), kFromSpace);
-  ASSERT_EQ(to_space_.id(), kToSpace);
+  CHECK_EQ(from_space_.id(), kFromSpace);
+  CHECK_EQ(to_space_.id(), kToSpace);
   from_space_.Verify();
   to_space_.Verify();
 }
@@ -1384,6 +1402,17 @@ bool SemiSpace::Uncommit() {
 }
 
 
+size_t SemiSpace::CommittedPhysicalMemory() {
+  if (!is_committed()) return 0;
+  size_t size = 0;
+  NewSpacePageIterator it(this);
+  while (it.has_next()) {
+    size += it.next()->CommittedPhysicalMemory();
+  }
+  return size;
+}
+
+
 bool SemiSpace::GrowTo(int new_capacity) {
   if (!is_committed()) {
     if (!Commit()) return false;
@@ -1524,8 +1553,9 @@ void SemiSpace::set_age_mark(Address mark) {
 
 #ifdef DEBUG
 void SemiSpace::Print() { }
+#endif
 
-
+#ifdef VERIFY_HEAP
 void SemiSpace::Verify() {
   bool is_from_space = (id_ == kFromSpace);
   NewSpacePage* page = anchor_.next_page();
@@ -1555,8 +1585,9 @@ void SemiSpace::Verify() {
     page = page->next_page();
   }
 }
+#endif
 
-
+#ifdef DEBUG
 void SemiSpace::AssertValidRange(Address start, Address end) {
   // Addresses belong to same semi-space
   NewSpacePage* page = NewSpacePage::FromLimit(start);
@@ -1816,6 +1847,17 @@ void NewSpace::RecordPromotion(HeapObject* obj) {
   promoted_histogram_[type].increment_bytes(obj->Size());
 }
 
+
+size_t NewSpace::CommittedPhysicalMemory() {
+  if (!VirtualMemory::HasLazyCommits()) return CommittedMemory();
+  MemoryChunk::UpdateHighWaterMark(allocation_info_.top);
+  size_t size = to_space_.CommittedPhysicalMemory();
+  if (from_space_.is_committed()) {
+    size += from_space_.CommittedPhysicalMemory();
+  }
+  return size;
+}
+
 // -----------------------------------------------------------------------------
 // Free lists for old object spaces implementation
 
@@ -2258,11 +2300,40 @@ bool PagedSpace::ReserveSpace(int size_in_bytes) {
   Free(top(), old_linear_size);
 
   SetTop(new_area->address(), new_area->address() + size_in_bytes);
-  Allocate(size_in_bytes);
   return true;
 }
 
 
+static void RepairFreeList(Heap* heap, FreeListNode* n) {
+  while (n != NULL) {
+    Map** map_location = reinterpret_cast<Map**>(n->address());
+    if (*map_location == NULL) {
+      *map_location = heap->free_space_map();
+    } else {
+      ASSERT(*map_location == heap->free_space_map());
+    }
+    n = n->next();
+  }
+}
+
+
+void FreeList::RepairLists(Heap* heap) {
+  RepairFreeList(heap, small_list_);
+  RepairFreeList(heap, medium_list_);
+  RepairFreeList(heap, large_list_);
+  RepairFreeList(heap, huge_list_);
+}
+
+
+// After we have booted, we have created a map which represents free space
+// on the heap.  If there was already a free list then the elements on it
+// were created with the wrong FreeSpaceMap (normally NULL), so we need to
+// fix them.
+void PagedSpace::RepairFreeListsAfterBoot() {
+  free_list_.RepairLists(heap());
+}
+
+
 // You have to call this last, since the implementation from PagedSpace
 // doesn't know that memory was 'promised' to large object space.
 bool LargeObjectSpace::ReserveSpace(int bytes) {
@@ -2320,10 +2391,13 @@ void PagedSpace::EvictEvacuationCandidatesFromFreeLists() {
 HeapObject* PagedSpace::SlowAllocateRaw(int size_in_bytes) {
   // Allocation in this space has failed.
 
-  // If there are unswept pages advance lazy sweeper then sweep one page before
-  // allocating a new page.
-  if (first_unswept_page_->is_valid()) {
-    AdvanceSweeper(size_in_bytes);
+  // If there are unswept pages advance lazy sweeper a bounded number of times
+  // until we find a size_in_bytes contiguous piece of memory
+  const int kMaxSweepingTries = 5;
+  bool sweeping_complete = false;
+
+  for (int i = 0; i < kMaxSweepingTries && !sweeping_complete; i++) {
+    sweeping_complete = AdvanceSweeper(size_in_bytes);
 
     // Retry the free list allocation.
     HeapObject* object = free_list_.Allocate(size_in_bytes);
@@ -2521,25 +2595,27 @@ void FixedSpace::PrepareForMarkCompact() {
 
 // -----------------------------------------------------------------------------
 // MapSpace implementation
+// TODO(mvstanton): this is weird...the compiler can't make a vtable unless
+// there is at least one non-inlined virtual function. I would prefer to hide
+// the VerifyObject definition behind VERIFY_HEAP.
 
-#ifdef DEBUG
 void MapSpace::VerifyObject(HeapObject* object) {
   // The object should be a map or a free-list node.
-  ASSERT(object->IsMap() || object->IsFreeSpace());
+  CHECK(object->IsMap() || object->IsFreeSpace());
 }
-#endif
 
 
 // -----------------------------------------------------------------------------
 // GlobalPropertyCellSpace implementation
+// TODO(mvstanton): this is weird...the compiler can't make a vtable unless
+// there is at least one non-inlined virtual function. I would prefer to hide
+// the VerifyObject definition behind VERIFY_HEAP.
 
-#ifdef DEBUG
 void CellSpace::VerifyObject(HeapObject* object) {
   // The object should be a global object property cell or a free-list node.
-  ASSERT(object->IsJSGlobalPropertyCell() ||
+  CHECK(object->IsJSGlobalPropertyCell() ||
          object->map() == heap()->two_pointer_filler_map());
 }
-#endif
 
 
 // -----------------------------------------------------------------------------
@@ -2649,18 +2725,31 @@ MaybeObject* LargeObjectSpace::AllocateRaw(int object_size,
 
   HeapObject* object = page->GetObject();
 
-#ifdef DEBUG
-  // Make the object consistent so the heap can be vefified in OldSpaceStep.
-  reinterpret_cast<Object**>(object->address())[0] =
-      heap()->fixed_array_map();
-  reinterpret_cast<Object**>(object->address())[1] = Smi::FromInt(0);
-#endif
+  if (Heap::ShouldZapGarbage()) {
+    // Make the object consistent so the heap can be verified in OldSpaceStep.
+    // We only need to do this in debug builds or if verify_heap is on.
+    reinterpret_cast<Object**>(object->address())[0] =
+        heap()->fixed_array_map();
+    reinterpret_cast<Object**>(object->address())[1] = Smi::FromInt(0);
+  }
 
   heap()->incremental_marking()->OldSpaceStep(object_size);
   return object;
 }
 
 
+size_t LargeObjectSpace::CommittedPhysicalMemory() {
+  if (!VirtualMemory::HasLazyCommits()) return CommittedMemory();
+  size_t size = 0;
+  LargePage* current = first_page_;
+  while (current != NULL) {
+    size += current->CommittedPhysicalMemory();
+    current = current->next_page();
+  }
+  return size;
+}
+
+
 // GC support
 MaybeObject* LargeObjectSpace::FindObject(Address a) {
   LargePage* page = FindPage(a);
@@ -2699,7 +2788,8 @@ void LargeObjectSpace::FreeUnmarkedObjects() {
     MarkBit mark_bit = Marking::MarkBitFrom(object);
     if (mark_bit.Get()) {
       mark_bit.Clear();
-      MemoryChunk::IncrementLiveBytesFromGC(object->address(), -object->Size());
+      Page::FromAddress(object->address())->ResetProgressBar();
+      Page::FromAddress(object->address())->ResetLiveBytes();
       previous = current;
       current = current->next_page();
     } else {
@@ -2753,7 +2843,7 @@ bool LargeObjectSpace::Contains(HeapObject* object) {
 }
 
 
-#ifdef DEBUG
+#ifdef VERIFY_HEAP
 // We do not assume that the large object iterator works, because it depends
 // on the invariants we are checking during verification.
 void LargeObjectSpace::Verify() {
@@ -2764,18 +2854,18 @@ void LargeObjectSpace::Verify() {
     // object area start.
     HeapObject* object = chunk->GetObject();
     Page* page = Page::FromAddress(object->address());
-    ASSERT(object->address() == page->area_start());
+    CHECK(object->address() == page->area_start());
 
     // The first word should be a map, and we expect all map pointers to be
     // in map space.
     Map* map = object->map();
-    ASSERT(map->IsMap());
-    ASSERT(heap()->map_space()->Contains(map));
+    CHECK(map->IsMap());
+    CHECK(heap()->map_space()->Contains(map));
 
     // We have only code, sequential strings, external strings
     // (sequential strings that have been morphed into external
     // strings), fixed arrays, and byte arrays in large object space.
-    ASSERT(object->IsCode() || object->IsSeqString() ||
+    CHECK(object->IsCode() || object->IsSeqString() ||
            object->IsExternalString() || object->IsFixedArray() ||
            object->IsFixedDoubleArray() || object->IsByteArray());
 
@@ -2794,15 +2884,17 @@ void LargeObjectSpace::Verify() {
         Object* element = array->get(j);
         if (element->IsHeapObject()) {
           HeapObject* element_object = HeapObject::cast(element);
-          ASSERT(heap()->Contains(element_object));
-          ASSERT(element_object->map()->IsMap());
+          CHECK(heap()->Contains(element_object));
+          CHECK(element_object->map()->IsMap());
         }
       }
     }
   }
 }
+#endif
 
 
+#ifdef DEBUG
 void LargeObjectSpace::Print() {
   LargeObjectIterator it(this);
   for (HeapObject* obj = it.Next(); obj != NULL; obj = it.Next()) {
diff --git a/deps/v8/src/spaces.h b/deps/v8/src/spaces.h
index 6602c899df..56f629e02f 100644
--- a/deps/v8/src/spaces.h
+++ b/deps/v8/src/spaces.h
@@ -100,9 +100,6 @@ class Isolate;
 #define ASSERT_OBJECT_ALIGNED(address)                                         \
   ASSERT((OffsetFrom(address) & kObjectAlignmentMask) == 0)
 
-#define ASSERT_MAP_ALIGNED(address)                                            \
-  ASSERT((OffsetFrom(address) & kMapAlignmentMask) == 0)
-
 #define ASSERT_OBJECT_SIZE(size)                                               \
   ASSERT((0 < size) && (size <= Page::kMaxNonCodeHeapObjectSize))
 
@@ -284,7 +281,9 @@ class Bitmap {
 
   bool IsClean() {
     for (int i = 0; i < CellsCount(); i++) {
-      if (cells()[i] != 0) return false;
+      if (cells()[i] != 0) {
+        return false;
+      }
     }
     return true;
   }
@@ -373,6 +372,11 @@ class MemoryChunk {
     return addr >= area_start() && addr <= area_end();
   }
 
+  // Every n write barrier invocations we go to runtime even though
+  // we could have handled it in generated code.  This lets us check
+  // whether we have hit the limit and should do some more marking.
+  static const int kWriteBarrierCounterGranularity = 500;
+
   enum MemoryChunkFlags {
     IS_EXECUTABLE,
     ABOUT_TO_BE_FREED,
@@ -393,6 +397,12 @@ class MemoryChunk {
     WAS_SWEPT_PRECISELY,
     WAS_SWEPT_CONSERVATIVELY,
 
+    // Large objects can have a progress bar in their page header. These object
+    // are scanned in increments and will be kept black while being scanned.
+    // Even if the mutator writes to them they will be kept black and a white
+    // to grey transition is performed in the value.
+    HAS_PROGRESS_BAR,
+
     // Last flag, keep at bottom.
     NUM_MEMORY_CHUNK_FLAGS
   };
@@ -468,6 +478,38 @@ class MemoryChunk {
     return live_byte_count_;
   }
 
+  int write_barrier_counter() {
+    return static_cast<int>(write_barrier_counter_);
+  }
+
+  void set_write_barrier_counter(int counter) {
+    write_barrier_counter_ = counter;
+  }
+
+  int progress_bar() {
+    ASSERT(IsFlagSet(HAS_PROGRESS_BAR));
+    return progress_bar_;
+  }
+
+  void set_progress_bar(int progress_bar) {
+    ASSERT(IsFlagSet(HAS_PROGRESS_BAR));
+    progress_bar_ = progress_bar;
+  }
+
+  void ResetProgressBar() {
+    if (IsFlagSet(MemoryChunk::HAS_PROGRESS_BAR)) {
+      set_progress_bar(0);
+      ClearFlag(MemoryChunk::HAS_PROGRESS_BAR);
+    }
+  }
+
+  bool IsLeftOfProgressBar(Object** slot) {
+    Address slot_address = reinterpret_cast<Address>(slot);
+    ASSERT(slot_address > this->address());
+    return (slot_address - (this->address() + kObjectStartOffset)) <
+           progress_bar();
+  }
+
   static void IncrementLiveBytesFromGC(Address address, int by) {
     MemoryChunk::FromAddress(address)->IncrementLiveBytes(by);
   }
@@ -488,11 +530,14 @@ class MemoryChunk {
 
   static const size_t kSlotsBufferOffset = kLiveBytesOffset + kIntSize;
 
-  static const size_t kHeaderSize =
+  static const size_t kWriteBarrierCounterOffset =
       kSlotsBufferOffset + kPointerSize + kPointerSize;
 
+  static const size_t kHeaderSize =
+      kWriteBarrierCounterOffset + kPointerSize + kIntSize + kIntSize;
+
   static const int kBodyOffset =
-    CODE_POINTER_ALIGN(MAP_POINTER_ALIGN(kHeaderSize + Bitmap::kSize));
+      CODE_POINTER_ALIGN(kHeaderSize + Bitmap::kSize);
 
   // The start offset of the object area in a page. Aligned to both maps and
   // code alignment to be suitable for both.  Also aligned to 32 words because
@@ -601,6 +646,13 @@ class MemoryChunk {
     return static_cast<int>(area_end() - area_start());
   }
 
+  // Approximate amount of physical memory committed for this chunk.
+  size_t CommittedPhysicalMemory() {
+    return high_water_mark_;
+  }
+
+  static inline void UpdateHighWaterMark(Address mark);
+
  protected:
   MemoryChunk* next_chunk_;
   MemoryChunk* prev_chunk_;
@@ -625,6 +677,13 @@ class MemoryChunk {
   int live_byte_count_;
   SlotsBuffer* slots_buffer_;
   SkipList* skip_list_;
+  intptr_t write_barrier_counter_;
+  // Used by the incremental marker to keep track of the scanning progress in
+  // large objects that have a progress bar and are scanned in increments.
+  int progress_bar_;
+  // Assuming the initial allocation on a page is sequential,
+  // count highest number of bytes ever allocated on the page.
+  int high_water_mark_;
 
   static MemoryChunk* Initialize(Heap* heap,
                                  Address base,
@@ -790,14 +849,6 @@ class Space : public Malloced {
   virtual void Print() = 0;
 #endif
 
-  // After calling this we can allocate a certain number of bytes using only
-  // linear allocation (with a LinearAllocationScope and an AlwaysAllocateScope)
-  // without using freelists or causing a GC.  This is used by partial
-  // snapshots.  It returns true of space was reserved or false if a GC is
-  // needed.  For paged spaces the space requested must include the space wasted
-  // at the end of each when allocating linearly.
-  virtual bool ReserveSpace(int bytes) = 0;
-
  private:
   Heap* heap_;
   AllocationSpace id_;
@@ -1318,6 +1369,11 @@ class FreeListNode: public HeapObject {
 
   inline void Zap();
 
+  static inline FreeListNode* cast(MaybeObject* maybe) {
+    ASSERT(!maybe->IsFailure());
+    return reinterpret_cast<FreeListNode*>(maybe);
+  }
+
  private:
   static const int kNextOffset = POINTER_SIZE_ALIGN(FreeSpace::kHeaderSize);
 
@@ -1380,6 +1436,9 @@ class FreeList BASE_EMBEDDED {
   bool IsVeryLong();
 #endif
 
+  // Used after booting the VM.
+  void RepairLists(Heap* heap);
+
   struct SizeStats {
     intptr_t Total() {
       return small_size_ + medium_size_ + large_size_ + huge_size_;
@@ -1460,6 +1519,10 @@ class PagedSpace : public Space {
   // linear in the number of objects in the page. It may be slow.
   MUST_USE_RESULT MaybeObject* FindObject(Address addr);
 
+  // During boot the free_space_map is created, and afterwards we may need
+  // to write it into the free list nodes that were already created.
+  virtual void RepairFreeListsAfterBoot();
+
   // Prepares for a mark-compact GC.
   virtual void PrepareForMarkCompact();
 
@@ -1470,6 +1533,9 @@ class PagedSpace : public Space {
   // spaces this equals the capacity.
   intptr_t CommittedMemory() { return Capacity(); }
 
+  // Approximate amount of physical memory committed for this space.
+  size_t CommittedPhysicalMemory();
+
   // Sets the capacity, the available space and the wasted space to zero.
   // The stats are rebuilt during sweeping by adding each page to the
   // capacity and the size when it is encountered.  As free spaces are
@@ -1530,6 +1596,7 @@ class PagedSpace : public Space {
   void SetTop(Address top, Address limit) {
     ASSERT(top == limit ||
            Page::FromAddress(top) == Page::FromAddress(limit - 1));
+    MemoryChunk::UpdateHighWaterMark(allocation_info_.top);
     allocation_info_.top = top;
     allocation_info_.limit = limit;
   }
@@ -1551,19 +1618,21 @@ class PagedSpace : public Space {
   // The dummy page that anchors the linked list of pages.
   Page* anchor() { return &anchor_; }
 
-#ifdef DEBUG
-  // Print meta info and objects in this space.
-  virtual void Print();
-
+#ifdef VERIFY_HEAP
   // Verify integrity of this space.
   virtual void Verify(ObjectVisitor* visitor);
 
-  // Reports statistics for the space
-  void ReportStatistics();
-
   // Overridden by subclasses to verify space-specific object
   // properties (e.g., only maps or free-list nodes are in map space).
   virtual void VerifyObject(HeapObject* obj) {}
+#endif
+
+#ifdef DEBUG
+  // Print meta info and objects in this space.
+  virtual void Print();
+
+  // Reports statistics for the space
+  void ReportStatistics();
 
   // Report code object related statistics
   void CollectCodeStatistics();
@@ -1911,9 +1980,12 @@ class SemiSpace : public Space {
   NewSpacePage* first_page() { return anchor_.next_page(); }
   NewSpacePage* current_page() { return current_page_; }
 
+#ifdef VERIFY_HEAP
+  virtual void Verify();
+#endif
+
 #ifdef DEBUG
   virtual void Print();
-  virtual void Verify();
   // Validate a range of of addresses in a SemiSpace.
   // The "from" address must be on a page prior to the "to" address,
   // in the linked page order, or it must be earlier on the same page.
@@ -1936,6 +2008,9 @@ class SemiSpace : public Space {
 
   static void Swap(SemiSpace* from, SemiSpace* to);
 
+  // Approximate amount of physical memory committed for this space.
+  size_t CommittedPhysicalMemory();
+
  private:
   // Flips the semispace between being from-space and to-space.
   // Copies the flags into the masked positions on all pages in the space.
@@ -2133,6 +2208,9 @@ class NewSpace : public Space {
     return Capacity();
   }
 
+  // Approximate amount of physical memory committed for this space.
+  size_t CommittedPhysicalMemory();
+
   // Return the available bytes without growing.
   intptr_t Available() {
     return Capacity() - Size();
@@ -2238,9 +2316,12 @@ class NewSpace : public Space {
   template <typename StringType>
   inline void ShrinkStringAtAllocationBoundary(String* string, int len);
 
-#ifdef DEBUG
+#ifdef VERIFY_HEAP
   // Verify the active semispace.
   virtual void Verify();
+#endif
+
+#ifdef DEBUG
   // Print the active semispace.
   virtual void Print() { to_space_.Print(); }
 #endif
@@ -2359,11 +2440,9 @@ class FixedSpace : public PagedSpace {
   FixedSpace(Heap* heap,
              intptr_t max_capacity,
              AllocationSpace id,
-             int object_size_in_bytes,
-             const char* name)
+             int object_size_in_bytes)
       : PagedSpace(heap, max_capacity, id, NOT_EXECUTABLE),
-        object_size_in_bytes_(object_size_in_bytes),
-        name_(name) {
+        object_size_in_bytes_(object_size_in_bytes) {
     page_extra_ = Page::kNonCodeObjectAreaSize % object_size_in_bytes;
   }
 
@@ -2380,9 +2459,6 @@ class FixedSpace : public PagedSpace {
  private:
   // The size of objects in this space.
   int object_size_in_bytes_;
-
-  // The name of this space.
-  const char* name_;
 };
 
 
@@ -2393,7 +2469,7 @@ class MapSpace : public FixedSpace {
  public:
   // Creates a map space object with a maximum capacity.
   MapSpace(Heap* heap, intptr_t max_capacity, AllocationSpace id)
-      : FixedSpace(heap, max_capacity, id, Map::kSize, "map"),
+      : FixedSpace(heap, max_capacity, id, Map::kSize),
         max_map_space_pages_(kMaxMapPageIndex - 1) {
   }
 
@@ -2410,9 +2486,7 @@ class MapSpace : public FixedSpace {
   }
 
  protected:
-#ifdef DEBUG
   virtual void VerifyObject(HeapObject* obj);
-#endif
 
  private:
   static const int kMapsPerPage = Page::kNonCodeObjectAreaSize / Map::kSize;
@@ -2436,7 +2510,7 @@ class CellSpace : public FixedSpace {
  public:
   // Creates a property cell space object with a maximum capacity.
   CellSpace(Heap* heap, intptr_t max_capacity, AllocationSpace id)
-      : FixedSpace(heap, max_capacity, id, JSGlobalPropertyCell::kSize, "cell")
+      : FixedSpace(heap, max_capacity, id, JSGlobalPropertyCell::kSize)
   {}
 
   virtual int RoundSizeDownToObjectAlignment(int size) {
@@ -2448,9 +2522,7 @@ class CellSpace : public FixedSpace {
   }
 
  protected:
-#ifdef DEBUG
   virtual void VerifyObject(HeapObject* obj);
-#endif
 
  public:
   TRACK_MEMORY("CellSpace")
@@ -2500,6 +2572,9 @@ class LargeObjectSpace : public Space {
     return Size();
   }
 
+  // Approximate amount of physical memory committed for this space.
+  size_t CommittedPhysicalMemory();
+
   int PageCount() {
     return page_count_;
   }
@@ -2529,8 +2604,11 @@ class LargeObjectSpace : public Space {
 
   LargePage* first_page() { return first_page_; }
 
-#ifdef DEBUG
+#ifdef VERIFY_HEAP
   virtual void Verify();
+#endif
+
+#ifdef DEBUG
   virtual void Print();
   void ReportStatistics();
   void CollectCodeStatistics();
diff --git a/deps/v8/src/store-buffer.cc b/deps/v8/src/store-buffer.cc
index 385215573d..66488ae504 100644
--- a/deps/v8/src/store-buffer.cc
+++ b/deps/v8/src/store-buffer.cc
@@ -372,7 +372,7 @@ void StoreBuffer::GCPrologue() {
 }
 
 
-#ifdef DEBUG
+#ifdef VERIFY_HEAP
 static void DummyScavengePointer(HeapObject** p, HeapObject* o) {
   // Do nothing.
 }
@@ -415,7 +415,7 @@ void StoreBuffer::VerifyPointers(LargeObjectSpace* space) {
 
 
 void StoreBuffer::Verify() {
-#ifdef DEBUG
+#ifdef VERIFY_HEAP
   VerifyPointers(heap_->old_pointer_space(),
                  &StoreBuffer::FindPointersToNewSpaceInRegion);
   VerifyPointers(heap_->map_space(),
@@ -427,9 +427,11 @@ void StoreBuffer::Verify() {
 
 void StoreBuffer::GCEpilogue() {
   during_gc_ = false;
+#ifdef VERIFY_HEAP
   if (FLAG_verify_heap) {
     Verify();
   }
+#endif
 }
 
 
diff --git a/deps/v8/src/store-buffer.h b/deps/v8/src/store-buffer.h
index 951a9ca2bc..79046d1540 100644
--- a/deps/v8/src/store-buffer.h
+++ b/deps/v8/src/store-buffer.h
@@ -195,7 +195,7 @@ class StoreBuffer {
 
   void IteratePointersInStoreBuffer(ObjectSlotCallback slot_callback);
 
-#ifdef DEBUG
+#ifdef VERIFY_HEAP
   void VerifyPointers(PagedSpace* space, RegionCallback region_callback);
   void VerifyPointers(LargeObjectSpace* space);
 #endif
@@ -210,8 +210,7 @@ class StoreBufferRebuildScope {
   explicit StoreBufferRebuildScope(Heap* heap,
                                    StoreBuffer* store_buffer,
                                    StoreBufferCallback callback)
-      : heap_(heap),
-        store_buffer_(store_buffer),
+      : store_buffer_(store_buffer),
         stored_state_(store_buffer->store_buffer_rebuilding_enabled_),
         stored_callback_(store_buffer->callback_) {
     store_buffer_->store_buffer_rebuilding_enabled_ = true;
@@ -226,7 +225,6 @@ class StoreBufferRebuildScope {
   }
 
  private:
-  Heap* heap_;
   StoreBuffer* store_buffer_;
   bool stored_state_;
   StoreBufferCallback stored_callback_;
diff --git a/deps/v8/src/string-stream.cc b/deps/v8/src/string-stream.cc
index 51aa2bb329..30519b5610 100644
--- a/deps/v8/src/string-stream.cc
+++ b/deps/v8/src/string-stream.cc
@@ -348,9 +348,12 @@ void StringStream::PrintUsingMap(JSObject* js_object) {
     Add("<Invalid map>\n");
     return;
   }
+  int real_size = map->NumberOfOwnDescriptors();
   DescriptorArray* descs = map->instance_descriptors();
   for (int i = 0; i < descs->number_of_descriptors(); i++) {
-    if (descs->GetType(i) == FIELD) {
+    PropertyDetails details = descs->GetDetails(i);
+    if (details.descriptor_index() > real_size) continue;
+    if (details.type() == FIELD) {
       Object* key = descs->GetKey(i);
       if (key->IsString() || key->IsNumber()) {
         int len = 3;
diff --git a/deps/v8/src/string.js b/deps/v8/src/string.js
index 6115930b6c..badfad3536 100644
--- a/deps/v8/src/string.js
+++ b/deps/v8/src/string.js
@@ -186,6 +186,9 @@ function StringMatch(regexp) {
   }
   var subject = TO_STRING_INLINE(this);
   if (IS_REGEXP(regexp)) {
+    // Emulate RegExp.prototype.exec's side effect in step 5, even though
+    // value is discarded.
+    ToInteger(regexp.lastIndex);
     if (!regexp.global) return RegExpExecNoTests(regexp, subject, 0);
     %_Log('regexp', 'regexp-match,%0S,%1r', [subject, regexp]);
     // lastMatchInfo is defined in regexp.js.
@@ -227,6 +230,9 @@ function StringReplace(search, replace) {
 
   // Delegate to one of the regular expression variants if necessary.
   if (IS_REGEXP(search)) {
+    // Emulate RegExp.prototype.exec's side effect in step 5, even though
+    // value is discarded.
+    ToInteger(search.lastIndex);
     %_Log('regexp', 'regexp-replace,%0r,%1S', [search, subject]);
     if (IS_SPEC_FUNCTION(replace)) {
       if (search.global) {
@@ -451,7 +457,10 @@ function StringReplaceGlobalRegExpWithFunction(subject, regexp, replace) {
 
 function StringReplaceNonGlobalRegExpWithFunction(subject, regexp, replace) {
   var matchInfo = DoRegExpExec(regexp, subject, 0);
-  if (IS_NULL(matchInfo)) return subject;
+  if (IS_NULL(matchInfo)) {
+    regexp.lastIndex = 0;
+    return subject;
+  }
   var index = matchInfo[CAPTURE0];
   var result = SubString(subject, 0, index);
   var endOfMatch = matchInfo[CAPTURE1];
@@ -801,6 +810,7 @@ function StringTrimRight() {
 
 var static_charcode_array = new InternalArray(4);
 
+
 // ECMA-262, section 15.5.3.2
 function StringFromCharCode(code) {
   var n = %_ArgumentsLength();
@@ -809,17 +819,24 @@ function StringFromCharCode(code) {
     return %_StringCharFromCode(code & 0xffff);
   }
 
-  // NOTE: This is not super-efficient, but it is necessary because we
-  // want to avoid converting to numbers from within the virtual
-  // machine. Maybe we can find another way of doing this?
-  var codes = static_charcode_array;
-  for (var i = 0; i < n; i++) {
+  var one_byte = %NewString(n, NEW_ONE_BYTE_STRING);
+  var i;
+  for (i = 0; i < n; i++) {
     var code = %_Arguments(i);
-    if (!%_IsSmi(code)) code = ToNumber(code);
-    codes[i] = code;
+    if (!%_IsSmi(code)) code = ToNumber(code) & 0xffff;
+    if (code > 0x7f) break;
+    %_OneByteSeqStringSetChar(one_byte, i, code);
+  }
+  if (i == n) return one_byte;
+  one_byte = %TruncateString(one_byte, i);
+
+  var two_byte = %NewString(n - i, NEW_TWO_BYTE_STRING);
+  for (var j = 0; i < n; i++, j++) {
+    var code = %_Arguments(i);
+    if (!%_IsSmi(code)) code = ToNumber(code) & 0xffff;
+    %_TwoByteSeqStringSetChar(two_byte, j, code);
   }
-  codes.length = n;
-  return %StringFromCharCodeArray(codes);
+  return one_byte + two_byte;
 }
 
 
diff --git a/deps/v8/src/stub-cache.cc b/deps/v8/src/stub-cache.cc
index 411914719c..bfed6bbac7 100644
--- a/deps/v8/src/stub-cache.cc
+++ b/deps/v8/src/stub-cache.cc
@@ -120,7 +120,8 @@ Handle<Code> StubCache::ComputeLoadNonexistent(Handle<String> name,
   // name specific if there are global objects involved.
   Code::Flags flags =
       Code::ComputeMonomorphicFlags(Code::LOAD_IC, Code::NONEXISTENT);
-  Handle<Object> probe(receiver->map()->FindInCodeCache(*cache_name, flags));
+  Handle<Object> probe(receiver->map()->FindInCodeCache(*cache_name, flags),
+                       isolate_);
   if (probe->IsCode()) return Handle<Code>::cast(probe);
 
   LoadStubCompiler compiler(isolate_);
@@ -136,10 +137,11 @@ Handle<Code> StubCache::ComputeLoadNonexistent(Handle<String> name,
 Handle<Code> StubCache::ComputeLoadField(Handle<String> name,
                                          Handle<JSObject> receiver,
                                          Handle<JSObject> holder,
-                                         int field_index) {
+                                         PropertyIndex field_index) {
   ASSERT(IC::GetCodeCacheForObject(*receiver, *holder) == OWN_MAP);
   Code::Flags flags = Code::ComputeMonomorphicFlags(Code::LOAD_IC, Code::FIELD);
-  Handle<Object> probe(receiver->map()->FindInCodeCache(*name, flags));
+  Handle<Object> probe(receiver->map()->FindInCodeCache(*name, flags),
+                       isolate_);
   if (probe->IsCode()) return Handle<Code>::cast(probe);
 
   LoadStubCompiler compiler(isolate_);
@@ -160,7 +162,8 @@ Handle<Code> StubCache::ComputeLoadCallback(Handle<String> name,
   ASSERT(IC::GetCodeCacheForObject(*receiver, *holder) == OWN_MAP);
   Code::Flags flags =
       Code::ComputeMonomorphicFlags(Code::LOAD_IC, Code::CALLBACKS);
-  Handle<Object> probe(receiver->map()->FindInCodeCache(*name, flags));
+  Handle<Object> probe(receiver->map()->FindInCodeCache(*name, flags),
+                       isolate_);
   if (probe->IsCode()) return Handle<Code>::cast(probe);
 
   LoadStubCompiler compiler(isolate_);
@@ -180,7 +183,8 @@ Handle<Code> StubCache::ComputeLoadViaGetter(Handle<String> name,
   ASSERT(IC::GetCodeCacheForObject(*receiver, *holder) == OWN_MAP);
   Code::Flags flags =
       Code::ComputeMonomorphicFlags(Code::LOAD_IC, Code::CALLBACKS);
-  Handle<Object> probe(receiver->map()->FindInCodeCache(*name, flags));
+  Handle<Object> probe(receiver->map()->FindInCodeCache(*name, flags),
+                       isolate_);
   if (probe->IsCode()) return Handle<Code>::cast(probe);
 
   LoadStubCompiler compiler(isolate_);
@@ -200,7 +204,8 @@ Handle<Code> StubCache::ComputeLoadConstant(Handle<String> name,
   ASSERT(IC::GetCodeCacheForObject(*receiver, *holder) == OWN_MAP);
   Code::Flags flags =
       Code::ComputeMonomorphicFlags(Code::LOAD_IC, Code::CONSTANT_FUNCTION);
-  Handle<Object> probe(receiver->map()->FindInCodeCache(*name, flags));
+  Handle<Object> probe(receiver->map()->FindInCodeCache(*name, flags),
+                       isolate_);
   if (probe->IsCode()) return Handle<Code>::cast(probe);
 
   LoadStubCompiler compiler(isolate_);
@@ -219,7 +224,8 @@ Handle<Code> StubCache::ComputeLoadInterceptor(Handle<String> name,
   ASSERT(IC::GetCodeCacheForObject(*receiver, *holder) == OWN_MAP);
   Code::Flags flags =
       Code::ComputeMonomorphicFlags(Code::LOAD_IC, Code::INTERCEPTOR);
-  Handle<Object> probe(receiver->map()->FindInCodeCache(*name, flags));
+  Handle<Object> probe(receiver->map()->FindInCodeCache(*name, flags),
+                       isolate_);
   if (probe->IsCode()) return Handle<Code>::cast(probe);
 
   LoadStubCompiler compiler(isolate_);
@@ -245,7 +251,8 @@ Handle<Code> StubCache::ComputeLoadGlobal(Handle<String> name,
   ASSERT(IC::GetCodeCacheForObject(*receiver, *holder) == OWN_MAP);
   Code::Flags flags =
       Code::ComputeMonomorphicFlags(Code::LOAD_IC, Code::NORMAL);
-  Handle<Object> probe(receiver->map()->FindInCodeCache(*name, flags));
+  Handle<Object> probe(receiver->map()->FindInCodeCache(*name, flags),
+                       isolate_);
   if (probe->IsCode()) return Handle<Code>::cast(probe);
 
   LoadStubCompiler compiler(isolate_);
@@ -261,11 +268,12 @@ Handle<Code> StubCache::ComputeLoadGlobal(Handle<String> name,
 Handle<Code> StubCache::ComputeKeyedLoadField(Handle<String> name,
                                               Handle<JSObject> receiver,
                                               Handle<JSObject> holder,
-                                              int field_index) {
+                                              PropertyIndex field_index) {
   ASSERT(IC::GetCodeCacheForObject(*receiver, *holder) == OWN_MAP);
   Code::Flags flags =
       Code::ComputeMonomorphicFlags(Code::KEYED_LOAD_IC, Code::FIELD);
-  Handle<Object> probe(receiver->map()->FindInCodeCache(*name, flags));
+  Handle<Object> probe(receiver->map()->FindInCodeCache(*name, flags),
+                       isolate_);
   if (probe->IsCode()) return Handle<Code>::cast(probe);
 
   KeyedLoadStubCompiler compiler(isolate_);
@@ -285,7 +293,8 @@ Handle<Code> StubCache::ComputeKeyedLoadConstant(Handle<String> name,
   ASSERT(IC::GetCodeCacheForObject(*receiver, *holder) == OWN_MAP);
   Code::Flags flags = Code::ComputeMonomorphicFlags(Code::KEYED_LOAD_IC,
                                                     Code::CONSTANT_FUNCTION);
-  Handle<Object> probe(receiver->map()->FindInCodeCache(*name, flags));
+  Handle<Object> probe(receiver->map()->FindInCodeCache(*name, flags),
+                       isolate_);
   if (probe->IsCode()) return Handle<Code>::cast(probe);
 
   KeyedLoadStubCompiler compiler(isolate_);
@@ -304,7 +313,8 @@ Handle<Code> StubCache::ComputeKeyedLoadInterceptor(Handle<String> name,
   ASSERT(IC::GetCodeCacheForObject(*receiver, *holder) == OWN_MAP);
   Code::Flags flags =
       Code::ComputeMonomorphicFlags(Code::KEYED_LOAD_IC, Code::INTERCEPTOR);
-  Handle<Object> probe(receiver->map()->FindInCodeCache(*name, flags));
+  Handle<Object> probe(receiver->map()->FindInCodeCache(*name, flags),
+                       isolate_);
   if (probe->IsCode()) return Handle<Code>::cast(probe);
 
   KeyedLoadStubCompiler compiler(isolate_);
@@ -324,7 +334,8 @@ Handle<Code> StubCache::ComputeKeyedLoadCallback(
   ASSERT(IC::GetCodeCacheForObject(*receiver, *holder) == OWN_MAP);
   Code::Flags flags =
       Code::ComputeMonomorphicFlags(Code::KEYED_LOAD_IC, Code::CALLBACKS);
-  Handle<Object> probe(receiver->map()->FindInCodeCache(*name, flags));
+  Handle<Object> probe(receiver->map()->FindInCodeCache(*name, flags),
+                       isolate_);
   if (probe->IsCode()) return Handle<Code>::cast(probe);
 
   KeyedLoadStubCompiler compiler(isolate_);
@@ -341,7 +352,8 @@ Handle<Code> StubCache::ComputeKeyedLoadArrayLength(Handle<String> name,
                                                     Handle<JSArray> receiver) {
   Code::Flags flags =
       Code::ComputeMonomorphicFlags(Code::KEYED_LOAD_IC, Code::CALLBACKS);
-  Handle<Object> probe(receiver->map()->FindInCodeCache(*name, flags));
+  Handle<Object> probe(receiver->map()->FindInCodeCache(*name, flags),
+                       isolate_);
   if (probe->IsCode()) return Handle<Code>::cast(probe);
 
   KeyedLoadStubCompiler compiler(isolate_);
@@ -358,7 +370,7 @@ Handle<Code> StubCache::ComputeKeyedLoadStringLength(Handle<String> name,
   Code::Flags flags =
       Code::ComputeMonomorphicFlags(Code::KEYED_LOAD_IC, Code::CALLBACKS);
   Handle<Map> map(receiver->map());
-  Handle<Object> probe(map->FindInCodeCache(*name, flags));
+  Handle<Object> probe(map->FindInCodeCache(*name, flags), isolate_);
   if (probe->IsCode()) return Handle<Code>::cast(probe);
 
   KeyedLoadStubCompiler compiler(isolate_);
@@ -375,7 +387,8 @@ Handle<Code> StubCache::ComputeKeyedLoadFunctionPrototype(
     Handle<JSFunction> receiver) {
   Code::Flags flags =
       Code::ComputeMonomorphicFlags(Code::KEYED_LOAD_IC, Code::CALLBACKS);
-  Handle<Object> probe(receiver->map()->FindInCodeCache(*name, flags));
+  Handle<Object> probe(receiver->map()->FindInCodeCache(*name, flags),
+                       isolate_);
   if (probe->IsCode()) return Handle<Code>::cast(probe);
 
   KeyedLoadStubCompiler compiler(isolate_);
@@ -396,7 +409,8 @@ Handle<Code> StubCache::ComputeStoreField(Handle<String> name,
       (transition.is_null()) ? Code::FIELD : Code::MAP_TRANSITION;
   Code::Flags flags = Code::ComputeMonomorphicFlags(
       Code::STORE_IC, type, strict_mode);
-  Handle<Object> probe(receiver->map()->FindInCodeCache(*name, flags));
+  Handle<Object> probe(receiver->map()->FindInCodeCache(*name, flags),
+                       isolate_);
   if (probe->IsCode()) return Handle<Code>::cast(probe);
 
   StoreStubCompiler compiler(isolate_, strict_mode);
@@ -438,7 +452,7 @@ Handle<Code> StubCache::ComputeKeyedLoadOrStoreElement(
       UNREACHABLE();
       break;
   }
-  Handle<Object> probe(receiver_map->FindInCodeCache(*name, flags));
+  Handle<Object> probe(receiver_map->FindInCodeCache(*name, flags), isolate_);
   if (probe->IsCode()) return Handle<Code>::cast(probe);
 
   Handle<Code> code;
@@ -490,7 +504,8 @@ Handle<Code> StubCache::ComputeStoreGlobal(Handle<String> name,
                                            StrictModeFlag strict_mode) {
   Code::Flags flags = Code::ComputeMonomorphicFlags(
       Code::STORE_IC, Code::NORMAL, strict_mode);
-  Handle<Object> probe(receiver->map()->FindInCodeCache(*name, flags));
+  Handle<Object> probe(receiver->map()->FindInCodeCache(*name, flags),
+                       isolate_);
   if (probe->IsCode()) return Handle<Code>::cast(probe);
 
   StoreStubCompiler compiler(isolate_, strict_mode);
@@ -510,7 +525,8 @@ Handle<Code> StubCache::ComputeStoreCallback(Handle<String> name,
   ASSERT(v8::ToCData<Address>(callback->setter()) != 0);
   Code::Flags flags = Code::ComputeMonomorphicFlags(
       Code::STORE_IC, Code::CALLBACKS, strict_mode);
-  Handle<Object> probe(receiver->map()->FindInCodeCache(*name, flags));
+  Handle<Object> probe(receiver->map()->FindInCodeCache(*name, flags),
+                       isolate_);
   if (probe->IsCode()) return Handle<Code>::cast(probe);
 
   StoreStubCompiler compiler(isolate_, strict_mode);
@@ -530,7 +546,8 @@ Handle<Code> StubCache::ComputeStoreViaSetter(Handle<String> name,
                                               StrictModeFlag strict_mode) {
   Code::Flags flags = Code::ComputeMonomorphicFlags(
       Code::STORE_IC, Code::CALLBACKS, strict_mode);
-  Handle<Object> probe(receiver->map()->FindInCodeCache(*name, flags));
+  Handle<Object> probe(receiver->map()->FindInCodeCache(*name, flags),
+                       isolate_);
   if (probe->IsCode()) return Handle<Code>::cast(probe);
 
   StoreStubCompiler compiler(isolate_, strict_mode);
@@ -548,7 +565,8 @@ Handle<Code> StubCache::ComputeStoreInterceptor(Handle<String> name,
                                                 StrictModeFlag strict_mode) {
   Code::Flags flags = Code::ComputeMonomorphicFlags(
       Code::STORE_IC, Code::INTERCEPTOR, strict_mode);
-  Handle<Object> probe(receiver->map()->FindInCodeCache(*name, flags));
+  Handle<Object> probe(receiver->map()->FindInCodeCache(*name, flags),
+                       isolate_);
   if (probe->IsCode()) return Handle<Code>::cast(probe);
 
   StoreStubCompiler compiler(isolate_, strict_mode);
@@ -568,7 +586,8 @@ Handle<Code> StubCache::ComputeKeyedStoreField(Handle<String> name,
       (transition.is_null()) ? Code::FIELD : Code::MAP_TRANSITION;
   Code::Flags flags = Code::ComputeMonomorphicFlags(
       Code::KEYED_STORE_IC, type, strict_mode);
-  Handle<Object> probe(receiver->map()->FindInCodeCache(*name, flags));
+  Handle<Object> probe(receiver->map()->FindInCodeCache(*name, flags),
+                       isolate_);
   if (probe->IsCode()) return Handle<Code>::cast(probe);
 
   KeyedStoreStubCompiler compiler(isolate(), strict_mode,
@@ -610,7 +629,8 @@ Handle<Code> StubCache::ComputeCallConstant(int argc,
   Code::Flags flags =
       Code::ComputeMonomorphicFlags(kind, Code::CONSTANT_FUNCTION, extra_state,
                                     cache_holder, argc);
-  Handle<Object> probe(map_holder->map()->FindInCodeCache(*name, flags));
+  Handle<Object> probe(map_holder->map()->FindInCodeCache(*name, flags),
+                       isolate_);
   if (probe->IsCode()) return Handle<Code>::cast(probe);
 
   CallStubCompiler compiler(isolate_, argc, kind, extra_state, cache_holder);
@@ -632,7 +652,7 @@ Handle<Code> StubCache::ComputeCallField(int argc,
                                          Handle<String> name,
                                          Handle<Object> object,
                                          Handle<JSObject> holder,
-                                         int index) {
+                                         PropertyIndex index) {
   // Compute the check type and the map.
   InlineCacheHolderFlag cache_holder =
       IC::GetCodeCacheForObject(*object, *holder);
@@ -648,7 +668,8 @@ Handle<Code> StubCache::ComputeCallField(int argc,
   Code::Flags flags =
       Code::ComputeMonomorphicFlags(kind, Code::FIELD, extra_state,
                                     cache_holder, argc);
-  Handle<Object> probe(map_holder->map()->FindInCodeCache(*name, flags));
+  Handle<Object> probe(map_holder->map()->FindInCodeCache(*name, flags),
+                       isolate_);
   if (probe->IsCode()) return Handle<Code>::cast(probe);
 
   CallStubCompiler compiler(isolate_, argc, kind, extra_state, cache_holder);
@@ -685,7 +706,8 @@ Handle<Code> StubCache::ComputeCallInterceptor(int argc,
   Code::Flags flags =
       Code::ComputeMonomorphicFlags(kind, Code::INTERCEPTOR, extra_state,
                                     cache_holder, argc);
-  Handle<Object> probe(map_holder->map()->FindInCodeCache(*name, flags));
+  Handle<Object> probe(map_holder->map()->FindInCodeCache(*name, flags),
+                       isolate_);
   if (probe->IsCode()) return Handle<Code>::cast(probe);
 
   CallStubCompiler compiler(isolate(), argc, kind, extra_state, cache_holder);
@@ -715,7 +737,8 @@ Handle<Code> StubCache::ComputeCallGlobal(int argc,
   Code::Flags flags =
       Code::ComputeMonomorphicFlags(kind, Code::NORMAL, extra_state,
                                     cache_holder, argc);
-  Handle<Object> probe(map_holder->map()->FindInCodeCache(*name, flags));
+  Handle<Object> probe(map_holder->map()->FindInCodeCache(*name, flags),
+                       isolate_);
   if (probe->IsCode()) return Handle<Code>::cast(probe);
 
   CallStubCompiler compiler(isolate(), argc, kind, extra_state, cache_holder);
@@ -747,10 +770,8 @@ Code* StubCache::FindCallInitialize(int argc,
       CallICBase::Contextual::encode(mode == RelocInfo::CODE_TARGET_CONTEXT);
   Code::Flags flags =
       Code::ComputeFlags(kind, UNINITIALIZED, extra_state, Code::NORMAL, argc);
-
-  // Use raw_unchecked... so we don't get assert failures during GC.
   UnseededNumberDictionary* dictionary =
-      isolate()->heap()->raw_unchecked_non_monomorphic_cache();
+      isolate()->heap()->non_monomorphic_cache();
   int entry = dictionary->FindEntry(isolate(), flags);
   ASSERT(entry != -1);
   Object* code = dictionary->ValueAt(entry);
@@ -1541,6 +1562,7 @@ int CallOptimization::GetPrototypeDepthOfExpectedType(
   while (!object.is_identical_to(holder)) {
     if (object->IsInstanceOf(*expected_receiver_type_)) return depth;
     object = Handle<JSObject>(JSObject::cast(object->GetPrototype()));
+    if (!object->map()->is_hidden_prototype()) return kInvalidProtoDepth;
     ++depth;
   }
   if (holder->IsInstanceOf(*expected_receiver_type_)) return depth;
diff --git a/deps/v8/src/stub-cache.h b/deps/v8/src/stub-cache.h
index 005c537ab1..f858e4722a 100644
--- a/deps/v8/src/stub-cache.h
+++ b/deps/v8/src/stub-cache.h
@@ -83,7 +83,7 @@ class StubCache {
   Handle<Code> ComputeLoadField(Handle<String> name,
                                 Handle<JSObject> receiver,
                                 Handle<JSObject> holder,
-                                int field_index);
+                                PropertyIndex field_index);
 
   Handle<Code> ComputeLoadCallback(Handle<String> name,
                                    Handle<JSObject> receiver,
@@ -117,7 +117,7 @@ class StubCache {
   Handle<Code> ComputeKeyedLoadField(Handle<String> name,
                                      Handle<JSObject> receiver,
                                      Handle<JSObject> holder,
-                                     int field_index);
+                                     PropertyIndex field_index);
 
   Handle<Code> ComputeKeyedLoadCallback(Handle<String> name,
                                         Handle<JSObject> receiver,
@@ -193,7 +193,7 @@ class StubCache {
                                 Handle<String> name,
                                 Handle<Object> object,
                                 Handle<JSObject> holder,
-                                int index);
+                                PropertyIndex index);
 
   Handle<Code> ComputeCallConstant(int argc,
                                    Code::Kind,
@@ -453,7 +453,7 @@ class StubCompiler BASE_EMBEDDED {
                                        Register dst,
                                        Register src,
                                        Handle<JSObject> holder,
-                                       int index);
+                                       PropertyIndex index);
 
   static void GenerateLoadArrayLength(MacroAssembler* masm,
                                       Register receiver,
@@ -540,7 +540,7 @@ class StubCompiler BASE_EMBEDDED {
                          Register scratch1,
                          Register scratch2,
                          Register scratch3,
-                         int index,
+                         PropertyIndex index,
                          Handle<String> name,
                          Label* miss);
 
@@ -611,7 +611,7 @@ class LoadStubCompiler: public StubCompiler {
 
   Handle<Code> CompileLoadField(Handle<JSObject> object,
                                 Handle<JSObject> holder,
-                                int index,
+                                PropertyIndex index,
                                 Handle<String> name);
 
   Handle<Code> CompileLoadCallback(Handle<String> name,
@@ -654,7 +654,7 @@ class KeyedLoadStubCompiler: public StubCompiler {
   Handle<Code> CompileLoadField(Handle<String> name,
                                 Handle<JSObject> object,
                                 Handle<JSObject> holder,
-                                int index);
+                                PropertyIndex index);
 
   Handle<Code> CompileLoadCallback(Handle<String> name,
                                    Handle<JSObject> object,
@@ -803,7 +803,7 @@ class CallStubCompiler: public StubCompiler {
 
   Handle<Code> CompileCallField(Handle<JSObject> object,
                                 Handle<JSObject> holder,
-                                int index,
+                                PropertyIndex index,
                                 Handle<String> name);
 
   Handle<Code> CompileCallConstant(Handle<Object> object,
diff --git a/deps/v8/src/token.h b/deps/v8/src/token.h
index 3036e5512a..863ba62857 100644
--- a/deps/v8/src/token.h
+++ b/deps/v8/src/token.h
@@ -99,6 +99,7 @@ namespace internal {
   T(SHL, "<<", 11)                                                      \
   T(SAR, ">>", 11)                                                      \
   T(SHR, ">>>", 11)                                                     \
+  T(ROR, "rotate right", 11)   /* only used by Crankshaft */            \
   T(ADD, "+", 12)                                                       \
   T(SUB, "-", 12)                                                       \
   T(MUL, "*", 13)                                                       \
diff --git a/deps/v8/src/transitions-inl.h b/deps/v8/src/transitions-inl.h
index 385bdd1199..cfaa99d737 100644
--- a/deps/v8/src/transitions-inl.h
+++ b/deps/v8/src/transitions-inl.h
@@ -69,12 +69,14 @@ void TransitionArray::ClearElementsTransition() {
 
 
 bool TransitionArray::HasElementsTransition() {
-  return get(kElementsTransitionIndex) != Smi::FromInt(0);
+  return IsFullTransitionArray() &&
+      get(kElementsTransitionIndex) != Smi::FromInt(0);
 }
 
 
 void TransitionArray::set_elements_transition(Map* transition_map,
                                               WriteBarrierMode mode) {
+  ASSERT(IsFullTransitionArray());
   Heap* heap = GetHeap();
   WRITE_FIELD(this, kElementsTransitionOffset, transition_map);
   CONDITIONAL_WRITE_BARRIER(
@@ -82,26 +84,6 @@ void TransitionArray::set_elements_transition(Map* transition_map,
 }
 
 
-DescriptorArray* TransitionArray::descriptors() {
-  return DescriptorArray::cast(get(kDescriptorsIndex));
-}
-
-
-void TransitionArray::set_descriptors(DescriptorArray* descriptors,
-                                      WriteBarrierMode mode) {
-  Heap* heap = GetHeap();
-  WRITE_FIELD(this, kDescriptorsOffset, descriptors);
-  CONDITIONAL_WRITE_BARRIER(
-      heap, this, kDescriptorsOffset, descriptors, mode);
-}
-
-
-Object** TransitionArray::GetDescriptorsSlot() {
-  return HeapObject::RawField(reinterpret_cast<HeapObject*>(this),
-                              kDescriptorsOffset);
-}
-
-
 Object* TransitionArray::back_pointer_storage() {
   return get(kBackPointerStorageIndex);
 }
@@ -117,12 +99,13 @@ void TransitionArray::set_back_pointer_storage(Object* back_pointer,
 
 
 bool TransitionArray::HasPrototypeTransitions() {
-  Object* prototype_transitions = get(kPrototypeTransitionsIndex);
-  return prototype_transitions != Smi::FromInt(0);
+  return IsFullTransitionArray() &&
+      get(kPrototypeTransitionsIndex) != Smi::FromInt(0);
 }
 
 
 FixedArray* TransitionArray::GetPrototypeTransitions() {
+  ASSERT(IsFullTransitionArray());
   Object* prototype_transitions = get(kPrototypeTransitionsIndex);
   return FixedArray::cast(prototype_transitions);
 }
@@ -136,7 +119,7 @@ HeapObject* TransitionArray::UncheckedPrototypeTransitions() {
 
 void TransitionArray::SetPrototypeTransitions(FixedArray* transitions,
                                               WriteBarrierMode mode) {
-  ASSERT(this != NULL);
+  ASSERT(IsFullTransitionArray());
   ASSERT(transitions->IsFixedArray());
   Heap* heap = GetHeap();
   WRITE_FIELD(this, kPrototypeTransitionsOffset, transitions);
@@ -152,6 +135,7 @@ Object** TransitionArray::GetPrototypeTransitionsSlot() {
 
 
 Object** TransitionArray::GetKeySlot(int transition_number) {
+  ASSERT(!IsSimpleTransition());
   ASSERT(transition_number < number_of_transitions());
   return HeapObject::RawField(
       reinterpret_cast<HeapObject*>(this),
@@ -160,24 +144,39 @@ Object** TransitionArray::GetKeySlot(int transition_number) {
 
 
 String* TransitionArray::GetKey(int transition_number) {
+  if (IsSimpleTransition()) {
+    Map* target = GetTarget(kSimpleTransitionIndex);
+    int descriptor = target->LastAdded();
+    String* key = target->instance_descriptors()->GetKey(descriptor);
+    return key;
+  }
   ASSERT(transition_number < number_of_transitions());
   return String::cast(get(ToKeyIndex(transition_number)));
 }
 
 
 void TransitionArray::SetKey(int transition_number, String* key) {
+  ASSERT(!IsSimpleTransition());
   ASSERT(transition_number < number_of_transitions());
   set(ToKeyIndex(transition_number), key);
 }
 
 
 Map* TransitionArray::GetTarget(int transition_number) {
+  if (IsSimpleTransition()) {
+    ASSERT(transition_number == kSimpleTransitionIndex);
+    return Map::cast(get(kSimpleTransitionTarget));
+  }
   ASSERT(transition_number < number_of_transitions());
   return Map::cast(get(ToTargetIndex(transition_number)));
 }
 
 
 void TransitionArray::SetTarget(int transition_number, Map* value) {
+  if (IsSimpleTransition()) {
+    ASSERT(transition_number == kSimpleTransitionIndex);
+    return set(kSimpleTransitionTarget, value);
+  }
   ASSERT(transition_number < number_of_transitions());
   set(ToTargetIndex(transition_number), value);
 }
@@ -192,20 +191,22 @@ PropertyDetails TransitionArray::GetTargetDetails(int transition_number) {
 
 
 int TransitionArray::Search(String* name) {
-  return internal::Search(this, name);
+  if (IsSimpleTransition()) {
+    String* key = GetKey(kSimpleTransitionIndex);
+    if (key->Equals(name)) return kSimpleTransitionIndex;
+    return kNotFound;
+  }
+  return internal::Search<ALL_ENTRIES>(this, name);
 }
 
 
-void TransitionArray::Set(int transition_number,
-                          String* key,
-                          Map* target,
-                          const WhitenessWitness&) {
-  NoIncrementalWriteBarrierSet(this,
-                               ToKeyIndex(transition_number),
-                               key);
-  NoIncrementalWriteBarrierSet(this,
-                               ToTargetIndex(transition_number),
-                               target);
+void TransitionArray::NoIncrementalWriteBarrierSet(int transition_number,
+                                                   String* key,
+                                                   Map* target) {
+  FixedArray::NoIncrementalWriteBarrierSet(
+      this, ToKeyIndex(transition_number), key);
+  FixedArray::NoIncrementalWriteBarrierSet(
+      this, ToTargetIndex(transition_number), target);
 }
 
 
diff --git a/deps/v8/src/transitions.cc b/deps/v8/src/transitions.cc
index 6f8b2fec5a..56b6caf3db 100644
--- a/deps/v8/src/transitions.cc
+++ b/deps/v8/src/transitions.cc
@@ -35,28 +35,33 @@ namespace v8 {
 namespace internal {
 
 
-MaybeObject* TransitionArray::Allocate(int number_of_transitions) {
+static MaybeObject* AllocateRaw(int length) {
   Heap* heap = Isolate::Current()->heap();
-  // Use FixedArray to not use DescriptorArray::cast on incomplete object.
+
+  // Use FixedArray to not use TransitionArray::cast on incomplete object.
   FixedArray* array;
-  MaybeObject* maybe_array =
-      heap->AllocateFixedArray(ToKeyIndex(number_of_transitions));
+  MaybeObject* maybe_array = heap->AllocateFixedArray(length);
   if (!maybe_array->To(&array)) return maybe_array;
+  return array;
+}
 
+
+MaybeObject* TransitionArray::Allocate(int number_of_transitions) {
+  FixedArray* array;
+  MaybeObject* maybe_array = AllocateRaw(ToKeyIndex(number_of_transitions));
+  if (!maybe_array->To(&array)) return maybe_array;
   array->set(kElementsTransitionIndex, Smi::FromInt(0));
   array->set(kPrototypeTransitionsIndex, Smi::FromInt(0));
   return array;
 }
 
 
-void TransitionArray::CopyFrom(TransitionArray* origin,
-                               int origin_transition,
-                               int target_transition,
-                               const WhitenessWitness& witness) {
-  Set(target_transition,
-      origin->GetKey(origin_transition),
-      origin->GetTarget(origin_transition),
-      witness);
+void TransitionArray::NoIncrementalWriteBarrierCopyFrom(TransitionArray* origin,
+                                                        int origin_transition,
+                                                        int target_transition) {
+  NoIncrementalWriteBarrierSet(target_transition,
+                               origin->GetKey(origin_transition),
+                               origin->GetTarget(origin_transition));
 }
 
 
@@ -65,15 +70,39 @@ static bool InsertionPointFound(String* key1, String* key2) {
 }
 
 
-MaybeObject* TransitionArray::NewWith(String* name, Map* target) {
+MaybeObject* TransitionArray::NewWith(SimpleTransitionFlag flag,
+                                      String* key,
+                                      Map* target,
+                                      Object* back_pointer) {
   TransitionArray* result;
+  MaybeObject* maybe_result;
+
+  if (flag == SIMPLE_TRANSITION) {
+    maybe_result = AllocateRaw(kSimpleTransitionSize);
+    if (!maybe_result->To(&result)) return maybe_result;
+    result->set(kSimpleTransitionTarget, target);
+  } else {
+    maybe_result = Allocate(1);
+    if (!maybe_result->To(&result)) return maybe_result;
+    result->NoIncrementalWriteBarrierSet(0, key, target);
+  }
+  result->set_back_pointer_storage(back_pointer);
+  return result;
+}
 
-  MaybeObject* maybe_array = TransitionArray::Allocate(1);
-  if (!maybe_array->To(&result)) return maybe_array;
 
-  FixedArray::WhitenessWitness witness(result);
+MaybeObject* TransitionArray::ExtendToFullTransitionArray() {
+  ASSERT(!IsFullTransitionArray());
+  int nof = number_of_transitions();
+  TransitionArray* result;
+  MaybeObject* maybe_result = Allocate(nof);
+  if (!maybe_result->To(&result)) return maybe_result;
+
+  if (nof == 1) {
+    result->NoIncrementalWriteBarrierCopyFrom(this, kSimpleTransitionIndex, 0);
+  }
 
-  result->Set(0, name, target, witness);
+  result->set_back_pointer_storage(back_pointer_storage());
   return result;
 }
 
@@ -99,28 +128,31 @@ MaybeObject* TransitionArray::CopyInsert(String* name, Map* target) {
     result->SetPrototypeTransitions(GetPrototypeTransitions());
   }
 
-  FixedArray::WhitenessWitness witness(result);
-
   if (insertion_index != kNotFound) {
     for (int i = 0; i < number_of_transitions; ++i) {
-      if (i != insertion_index) result->CopyFrom(this, i, i, witness);
+      if (i != insertion_index) {
+        result->NoIncrementalWriteBarrierCopyFrom(this, i, i);
+      }
     }
-    result->Set(insertion_index, name, target, witness);
+    result->NoIncrementalWriteBarrierSet(insertion_index, name, target);
     return result;
   }
 
   insertion_index = 0;
   for (; insertion_index < number_of_transitions; ++insertion_index) {
     if (InsertionPointFound(GetKey(insertion_index), name)) break;
-    result->CopyFrom(this, insertion_index, insertion_index, witness);
+    result->NoIncrementalWriteBarrierCopyFrom(
+        this, insertion_index, insertion_index);
   }
 
-  result->Set(insertion_index, name, target, witness);
+  result->NoIncrementalWriteBarrierSet(insertion_index, name, target);
 
   for (; insertion_index < number_of_transitions; ++insertion_index) {
-    result->CopyFrom(this, insertion_index, insertion_index + 1, witness);
+    result->NoIncrementalWriteBarrierCopyFrom(
+        this, insertion_index, insertion_index + 1);
   }
 
+  result->set_back_pointer_storage(back_pointer_storage());
   return result;
 }
 
diff --git a/deps/v8/src/transitions.h b/deps/v8/src/transitions.h
index 63e52badcd..0a660261c5 100644
--- a/deps/v8/src/transitions.h
+++ b/deps/v8/src/transitions.h
@@ -39,13 +39,22 @@ namespace internal {
 
 
 // TransitionArrays are fixed arrays used to hold map transitions for property,
-// constant, and element changes.
-// The format of the these objects is:
-// [0] Descriptor array
-// [1] Undefined or back pointer map
-// [2] Smi(0) or elements transition map
-// [3] Smi(0) or fixed array of prototype transitions
-// [4] First transition
+// constant, and element changes. They can either be simple transition arrays
+// that store a single property transition, or a full transition array that has
+// space for elements transitions, prototype transitions and multiple property
+// transitons. The details related to property transitions are accessed in the
+// descriptor array of the target map. In the case of a simple transition, the
+// key is also read from the descriptor array of the target map.
+//
+// The simple format of the these objects is:
+// [0] Undefined or back pointer map
+// [1] Single transition
+//
+// The full format is:
+// [0] Undefined or back pointer map
+// [1] Smi(0) or elements transition map
+// [2] Smi(0) or fixed array of prototype transitions
+// [3] First transition
 // [length() - kTransitionSize] Last transition
 class TransitionArray: public FixedArray {
  public:
@@ -71,11 +80,6 @@ class TransitionArray: public FixedArray {
   inline bool HasElementsTransition();
   inline void ClearElementsTransition();
 
-  inline DescriptorArray* descriptors();
-  inline void set_descriptors(DescriptorArray* descriptors,
-                              WriteBarrierMode mode = UPDATE_WRITE_BARRIER);
-  inline Object** GetDescriptorsSlot();
-
   inline Object* back_pointer_storage();
   inline void set_back_pointer_storage(
       Object* back_pointer,
@@ -91,7 +95,7 @@ class TransitionArray: public FixedArray {
 
   // Returns the number of transitions in the array.
   int number_of_transitions() {
-    ASSERT(length() >= kFirstIndex);
+    if (IsSimpleTransition()) return 1;
     int len = length();
     return len <= kFirstIndex ? 0 : (len - kFirstIndex) / kTransitionSize;
   }
@@ -99,7 +103,13 @@ class TransitionArray: public FixedArray {
   inline int number_of_entries() { return number_of_transitions(); }
 
   // Allocate a new transition array with a single entry.
-  static MUST_USE_RESULT MaybeObject* NewWith(String* name, Map* target);
+  static MUST_USE_RESULT MaybeObject* NewWith(
+      SimpleTransitionFlag flag,
+      String* key,
+      Map* target,
+      Object* back_pointer);
+
+  MUST_USE_RESULT MaybeObject* ExtendToFullTransitionArray();
 
   // Copy the transition array, inserting a new transition.
   // TODO(verwaest): This should not cause an existing transition to be
@@ -107,10 +117,9 @@ class TransitionArray: public FixedArray {
   MUST_USE_RESULT MaybeObject* CopyInsert(String* name, Map* target);
 
   // Copy a single transition from the origin array.
-  inline void CopyFrom(TransitionArray* origin,
-                       int origin_transition,
-                       int target_transition,
-                       const WhitenessWitness& witness);
+  inline void NoIncrementalWriteBarrierCopyFrom(TransitionArray* origin,
+                                                int origin_transition,
+                                                int target_transition);
 
   // Search a transition for a given property name.
   inline int Search(String* name);
@@ -118,28 +127,37 @@ class TransitionArray: public FixedArray {
   // Allocates a TransitionArray.
   MUST_USE_RESULT static MaybeObject* Allocate(int number_of_transitions);
 
+  bool IsSimpleTransition() { return length() == kSimpleTransitionSize; }
+  bool IsFullTransitionArray() { return length() >= kFirstIndex; }
+
   // Casting.
   static inline TransitionArray* cast(Object* obj);
 
   // Constant for denoting key was not found.
   static const int kNotFound = -1;
 
-  static const int kDescriptorsIndex = 0;
-  static const int kBackPointerStorageIndex = 1;
-  static const int kElementsTransitionIndex = 2;
-  static const int kPrototypeTransitionsIndex = 3;
-  static const int kFirstIndex = 4;
+  static const int kBackPointerStorageIndex = 0;
 
-  // Layout transition array header.
-  static const int kDescriptorsOffset = FixedArray::kHeaderSize;
-  static const int kBackPointerStorageOffset = kDescriptorsOffset +
-                                               kPointerSize;
+  // Layout for full transition arrays.
+  static const int kElementsTransitionIndex = 1;
+  static const int kPrototypeTransitionsIndex = 2;
+  static const int kFirstIndex = 3;
+
+  // Layout for simple transition arrays.
+  static const int kSimpleTransitionTarget = 1;
+  static const int kSimpleTransitionSize = 2;
+  static const int kSimpleTransitionIndex = 0;
+  STATIC_ASSERT(kSimpleTransitionIndex != kNotFound);
+
+  static const int kBackPointerStorageOffset = FixedArray::kHeaderSize;
+
+  // Layout for the full transition array header.
   static const int kElementsTransitionOffset = kBackPointerStorageOffset +
                                                kPointerSize;
   static const int kPrototypeTransitionsOffset = kElementsTransitionOffset +
                                                  kPointerSize;
 
-  // Layout of map transition.
+  // Layout of map transition entries in full transition arrays.
   static const int kTransitionKey = 0;
   static const int kTransitionTarget = 1;
   static const int kTransitionSize = 2;
@@ -153,7 +171,7 @@ class TransitionArray: public FixedArray {
 #endif
 
 #ifdef DEBUG
-  bool IsSortedNoDuplicates();
+  bool IsSortedNoDuplicates(int valid_entries = -1);
   bool IsConsistentWithBackPointers(Map* current_map);
   bool IsEqualTo(TransitionArray* other);
 #endif
@@ -176,10 +194,9 @@ class TransitionArray: public FixedArray {
            kTransitionTarget;
   }
 
-  inline void Set(int transition_number,
-                  String* key,
-                  Map* target,
-                  const WhitenessWitness&);
+  inline void NoIncrementalWriteBarrierSet(int transition_number,
+                                           String* key,
+                                           Map* target);
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(TransitionArray);
 };
diff --git a/deps/v8/src/type-info.cc b/deps/v8/src/type-info.cc
index bc6a46b4b6..7a9a5de809 100644
--- a/deps/v8/src/type-info.cc
+++ b/deps/v8/src/type-info.cc
@@ -79,7 +79,7 @@ static uint32_t IdToKey(TypeFeedbackId ast_id) {
 Handle<Object> TypeFeedbackOracle::GetInfo(TypeFeedbackId ast_id) {
   int entry = dictionary_->FindEntry(IdToKey(ast_id));
   return entry != UnseededNumberDictionary::kNotFound
-      ? Handle<Object>(dictionary_->ValueAt(entry))
+      ? Handle<Object>(dictionary_->ValueAt(entry), isolate_)
       : Handle<Object>::cast(isolate_->factory()->undefined_value());
 }
 
@@ -312,43 +312,53 @@ bool TypeFeedbackOracle::LoadIsBuiltin(Property* expr, Builtins::Name id) {
 }
 
 
-TypeInfo TypeFeedbackOracle::CompareType(CompareOperation* expr) {
-  Handle<Object> object = GetInfo(expr->CompareOperationFeedbackId());
-  TypeInfo unknown = TypeInfo::Unknown();
-  if (!object->IsCode()) return unknown;
-  Handle<Code> code = Handle<Code>::cast(object);
-  if (!code->is_compare_ic_stub()) return unknown;
-
-  CompareIC::State state = static_cast<CompareIC::State>(code->compare_state());
+static TypeInfo TypeFromCompareType(CompareIC::State state) {
   switch (state) {
     case CompareIC::UNINITIALIZED:
       // Uninitialized means never executed.
       return TypeInfo::Uninitialized();
-    case CompareIC::SMIS:
+    case CompareIC::SMI:
       return TypeInfo::Smi();
-    case CompareIC::HEAP_NUMBERS:
+    case CompareIC::HEAP_NUMBER:
       return TypeInfo::Number();
-    case CompareIC::SYMBOLS:
-    case CompareIC::STRINGS:
+    case CompareIC::SYMBOL:
+      return TypeInfo::Symbol();
+    case CompareIC::STRING:
       return TypeInfo::String();
-    case CompareIC::OBJECTS:
+    case CompareIC::OBJECT:
     case CompareIC::KNOWN_OBJECTS:
       // TODO(kasperl): We really need a type for JS objects here.
       return TypeInfo::NonPrimitive();
     case CompareIC::GENERIC:
     default:
-      return unknown;
+      return TypeInfo::Unknown();
   }
 }
 
 
-bool TypeFeedbackOracle::IsSymbolCompare(CompareOperation* expr) {
+void TypeFeedbackOracle::CompareType(CompareOperation* expr,
+                                     TypeInfo* left_type,
+                                     TypeInfo* right_type,
+                                     TypeInfo* overall_type) {
   Handle<Object> object = GetInfo(expr->CompareOperationFeedbackId());
-  if (!object->IsCode()) return false;
+  TypeInfo unknown = TypeInfo::Unknown();
+  if (!object->IsCode()) {
+    *left_type = *right_type = *overall_type = unknown;
+    return;
+  }
   Handle<Code> code = Handle<Code>::cast(object);
-  if (!code->is_compare_ic_stub()) return false;
-  CompareIC::State state = static_cast<CompareIC::State>(code->compare_state());
-  return state == CompareIC::SYMBOLS;
+  if (!code->is_compare_ic_stub()) {
+    *left_type = *right_type = *overall_type = unknown;
+    return;
+  }
+
+  int stub_minor_key = code->stub_info();
+  CompareIC::State left_state, right_state, handler_state;
+  ICCompareStub::DecodeMinorKey(stub_minor_key, &left_state, &right_state,
+                                &handler_state, NULL);
+  *left_type = TypeFromCompareType(left_state);
+  *right_type = TypeFromCompareType(right_state);
+  *overall_type = TypeFromCompareType(handler_state);
 }
 
 
@@ -357,7 +367,7 @@ Handle<Map> TypeFeedbackOracle::GetCompareMap(CompareOperation* expr) {
   if (!object->IsCode()) return Handle<Map>::null();
   Handle<Code> code = Handle<Code>::cast(object);
   if (!code->is_compare_ic_stub()) return Handle<Map>::null();
-  CompareIC::State state = static_cast<CompareIC::State>(code->compare_state());
+  CompareIC::State state = ICCompareStub::CompareState(code->stub_info());
   if (state != CompareIC::KNOWN_OBJECTS) {
     return Handle<Map>::null();
   }
@@ -388,55 +398,44 @@ TypeInfo TypeFeedbackOracle::UnaryType(UnaryOperation* expr) {
 }
 
 
-TypeInfo TypeFeedbackOracle::BinaryType(BinaryOperation* expr) {
+static TypeInfo TypeFromBinaryOpType(BinaryOpIC::TypeInfo binary_type) {
+  switch (binary_type) {
+    // Uninitialized means never executed.
+    case BinaryOpIC::UNINITIALIZED:  return TypeInfo::Uninitialized();
+    case BinaryOpIC::SMI:            return TypeInfo::Smi();
+    case BinaryOpIC::INT32:          return TypeInfo::Integer32();
+    case BinaryOpIC::HEAP_NUMBER:    return TypeInfo::Double();
+    case BinaryOpIC::ODDBALL:        return TypeInfo::Unknown();
+    case BinaryOpIC::STRING:         return TypeInfo::String();
+    case BinaryOpIC::GENERIC:        return TypeInfo::Unknown();
+  }
+  UNREACHABLE();
+  return TypeInfo::Unknown();
+}
+
+
+void TypeFeedbackOracle::BinaryType(BinaryOperation* expr,
+                                    TypeInfo* left,
+                                    TypeInfo* right,
+                                    TypeInfo* result) {
   Handle<Object> object = GetInfo(expr->BinaryOperationFeedbackId());
   TypeInfo unknown = TypeInfo::Unknown();
-  if (!object->IsCode()) return unknown;
+  if (!object->IsCode()) {
+    *left = *right = *result = unknown;
+    return;
+  }
   Handle<Code> code = Handle<Code>::cast(object);
   if (code->is_binary_op_stub()) {
-    BinaryOpIC::TypeInfo type = static_cast<BinaryOpIC::TypeInfo>(
-        code->binary_op_type());
-    BinaryOpIC::TypeInfo result_type = static_cast<BinaryOpIC::TypeInfo>(
-        code->binary_op_result_type());
-
-    switch (type) {
-      case BinaryOpIC::UNINITIALIZED:
-        // Uninitialized means never executed.
-        return TypeInfo::Uninitialized();
-      case BinaryOpIC::SMI:
-        switch (result_type) {
-          case BinaryOpIC::UNINITIALIZED:
-            if (expr->op() == Token::DIV) {
-              return TypeInfo::Double();
-            }
-            return TypeInfo::Smi();
-          case BinaryOpIC::SMI:
-            return TypeInfo::Smi();
-          case BinaryOpIC::INT32:
-            return TypeInfo::Integer32();
-          case BinaryOpIC::HEAP_NUMBER:
-            return TypeInfo::Double();
-          default:
-            return unknown;
-        }
-      case BinaryOpIC::INT32:
-        if (expr->op() == Token::DIV ||
-            result_type == BinaryOpIC::HEAP_NUMBER) {
-          return TypeInfo::Double();
-        }
-        return TypeInfo::Integer32();
-      case BinaryOpIC::HEAP_NUMBER:
-        return TypeInfo::Double();
-      case BinaryOpIC::BOTH_STRING:
-        return TypeInfo::String();
-      case BinaryOpIC::STRING:
-      case BinaryOpIC::GENERIC:
-        return unknown;
-     default:
-        return unknown;
-    }
+    BinaryOpIC::TypeInfo left_type, right_type, result_type;
+    BinaryOpStub::decode_types_from_minor_key(code->stub_info(), &left_type,
+                                              &right_type, &result_type);
+    *left = TypeFromBinaryOpType(left_type);
+    *right = TypeFromBinaryOpType(right_type);
+    *result = TypeFromBinaryOpType(result_type);
+    return;
   }
-  return unknown;
+  // Not a binary op stub.
+  *left = *right = *result = unknown;
 }
 
 
@@ -447,28 +446,8 @@ TypeInfo TypeFeedbackOracle::SwitchType(CaseClause* clause) {
   Handle<Code> code = Handle<Code>::cast(object);
   if (!code->is_compare_ic_stub()) return unknown;
 
-  CompareIC::State state = static_cast<CompareIC::State>(code->compare_state());
-  switch (state) {
-    case CompareIC::UNINITIALIZED:
-      // Uninitialized means never executed.
-      // TODO(fschneider): Introduce a separate value for never-executed ICs.
-      return unknown;
-    case CompareIC::SMIS:
-      return TypeInfo::Smi();
-    case CompareIC::STRINGS:
-      return TypeInfo::String();
-    case CompareIC::SYMBOLS:
-      return TypeInfo::Symbol();
-    case CompareIC::HEAP_NUMBERS:
-      return TypeInfo::Number();
-    case CompareIC::OBJECTS:
-    case CompareIC::KNOWN_OBJECTS:
-      // TODO(kasperl): We really need a type for JS objects here.
-      return TypeInfo::NonPrimitive();
-    case CompareIC::GENERIC:
-    default:
-      return unknown;
-  }
+  CompareIC::State state = ICCompareStub::CompareState(code->stub_info());
+  return TypeFromCompareType(state);
 }
 
 
@@ -479,9 +458,14 @@ TypeInfo TypeFeedbackOracle::IncrementType(CountOperation* expr) {
   Handle<Code> code = Handle<Code>::cast(object);
   if (!code->is_binary_op_stub()) return unknown;
 
-  BinaryOpIC::TypeInfo type = static_cast<BinaryOpIC::TypeInfo>(
-      code->binary_op_type());
-  switch (type) {
+  BinaryOpIC::TypeInfo left_type, right_type, unused_result_type;
+  BinaryOpStub::decode_types_from_minor_key(code->stub_info(), &left_type,
+                                            &right_type, &unused_result_type);
+  // CountOperations should always have +1 or -1 as their right input.
+  ASSERT(right_type == BinaryOpIC::SMI ||
+         right_type == BinaryOpIC::UNINITIALIZED);
+
+  switch (left_type) {
     case BinaryOpIC::UNINITIALIZED:
     case BinaryOpIC::SMI:
       return TypeInfo::Smi();
@@ -489,7 +473,6 @@ TypeInfo TypeFeedbackOracle::IncrementType(CountOperation* expr) {
       return TypeInfo::Integer32();
     case BinaryOpIC::HEAP_NUMBER:
       return TypeInfo::Double();
-    case BinaryOpIC::BOTH_STRING:
     case BinaryOpIC::STRING:
     case BinaryOpIC::GENERIC:
       return unknown;
diff --git a/deps/v8/src/type-info.h b/deps/v8/src/type-info.h
index 00d88c2afc..8b2ec49310 100644
--- a/deps/v8/src/type-info.h
+++ b/deps/v8/src/type-info.h
@@ -204,6 +204,7 @@ class TypeInfo {
     kNonPrimitive = 0x40,  // 1000000
     kUninitialized = 0x7f  // 1111111
   };
+
   explicit inline TypeInfo(Type t) : type_(t) { }
 
   Type type_;
@@ -287,9 +288,14 @@ class TypeFeedbackOracle: public ZoneObject {
 
   // Get type information for arithmetic operations and compares.
   TypeInfo UnaryType(UnaryOperation* expr);
-  TypeInfo BinaryType(BinaryOperation* expr);
-  TypeInfo CompareType(CompareOperation* expr);
-  bool IsSymbolCompare(CompareOperation* expr);
+  void BinaryType(BinaryOperation* expr,
+                  TypeInfo* left,
+                  TypeInfo* right,
+                  TypeInfo* result);
+  void CompareType(CompareOperation* expr,
+                   TypeInfo* left_type,
+                   TypeInfo* right_type,
+                   TypeInfo* overall_type);
   Handle<Map> GetCompareMap(CompareOperation* expr);
   TypeInfo SwitchType(CaseClause* clause);
   TypeInfo IncrementType(CountOperation* expr);
diff --git a/deps/v8/src/uri.js b/deps/v8/src/uri.js
index b195f3da79..1de22f8aeb 100644
--- a/deps/v8/src/uri.js
+++ b/deps/v8/src/uri.js
@@ -165,11 +165,11 @@ function URIDecodeOctets(octets, result, index) {
     throw new $URIError("URI malformed");
   }
   if (value < 0x10000) {
-    result[index++] = value;
+    %_TwoByteSeqStringSetChar(result, index++, value);
     return index;
   } else {
-    result[index++] = (value >> 10) + 0xd7c0;
-    result[index++] = (value & 0x3ff) + 0xdc00;
+    %_TwoByteSeqStringSetChar(result, index++, (value >> 10) + 0xd7c0);
+    %_TwoByteSeqStringSetChar(result, index++, (value & 0x3ff) + 0xdc00);
     return index;
   }
 }
@@ -178,43 +178,72 @@ function URIDecodeOctets(octets, result, index) {
 // ECMA-262, section 15.1.3
 function Encode(uri, unescape) {
   var uriLength = uri.length;
-  // We are going to pass result to %StringFromCharCodeArray
-  // which does not expect any getters/setters installed
-  // on the incoming array.
-  var result = new InternalArray(uriLength);
+  var array = new InternalArray(uriLength);
   var index = 0;
   for (var k = 0; k < uriLength; k++) {
     var cc1 = uri.charCodeAt(k);
     if (unescape(cc1)) {
-      result[index++] = cc1;
+      array[index++] = cc1;
     } else {
       if (cc1 >= 0xDC00 && cc1 <= 0xDFFF) throw new $URIError("URI malformed");
       if (cc1 < 0xD800 || cc1 > 0xDBFF) {
-        index = URIEncodeSingle(cc1, result, index);
+        index = URIEncodeSingle(cc1, array, index);
       } else {
         k++;
         if (k == uriLength) throw new $URIError("URI malformed");
         var cc2 = uri.charCodeAt(k);
         if (cc2 < 0xDC00 || cc2 > 0xDFFF) throw new $URIError("URI malformed");
-        index = URIEncodePair(cc1, cc2, result, index);
+        index = URIEncodePair(cc1, cc2, array, index);
       }
     }
   }
-  return %StringFromCharCodeArray(result);
+
+  var result = %NewString(array.length, NEW_ONE_BYTE_STRING);
+  for (var i = 0; i < array.length; i++) {
+    %_OneByteSeqStringSetChar(result, i, array[i]);
+  }
+  return result;
 }
 
 
 // ECMA-262, section 15.1.3
 function Decode(uri, reserved) {
   var uriLength = uri.length;
-  // We are going to pass result to %StringFromCharCodeArray
-  // which does not expect any getters/setters installed
-  // on the incoming array.
-  var result = new InternalArray(uriLength);
+  var one_byte = %NewString(uriLength, NEW_ONE_BYTE_STRING);
   var index = 0;
-  for (var k = 0; k < uriLength; k++) {
-    var ch = uri.charAt(k);
-    if (ch == '%') {
+  var k = 0;
+
+  // Optimistically assume ascii string.
+  for ( ; k < uriLength; k++) {
+    var code = uri.charCodeAt(k);
+    if (code == 37) {  // '%'
+      if (k + 2 >= uriLength) throw new $URIError("URI malformed");
+      var cc = URIHexCharsToCharCode(uri.charCodeAt(k+1), uri.charCodeAt(k+2));
+      if (cc >> 7) break;  // Assumption wrong, two byte string.
+      if (reserved(cc)) {
+        %_OneByteSeqStringSetChar(one_byte, index++, 37);  // '%'.
+        %_OneByteSeqStringSetChar(one_byte, index++, uri.charCodeAt(k+1));
+        %_OneByteSeqStringSetChar(one_byte, index++, uri.charCodeAt(k+2));
+      } else {
+        %_OneByteSeqStringSetChar(one_byte, index++, cc);
+      }
+      k += 2;
+    } else {
+      if (code > 0x7f) break;  // Assumption wrong, two byte string.
+      %_OneByteSeqStringSetChar(one_byte, index++, code);
+    }
+  }
+
+  one_byte = %TruncateString(one_byte, index);
+  if (k == uriLength) return one_byte;
+
+  // Write into two byte string.
+  var two_byte = %NewString(uriLength - k, NEW_TWO_BYTE_STRING);
+  index = 0;
+
+  for ( ; k < uriLength; k++) {
+    var code = uri.charCodeAt(k);
+    if (code == 37) {  // '%'
       if (k + 2 >= uriLength) throw new $URIError("URI malformed");
       var cc = URIHexCharsToCharCode(uri.charCodeAt(++k), uri.charCodeAt(++k));
       if (cc >> 7) {
@@ -229,22 +258,21 @@ function Decode(uri, reserved) {
           octets[i] = URIHexCharsToCharCode(uri.charCodeAt(++k),
                                             uri.charCodeAt(++k));
         }
-        index = URIDecodeOctets(octets, result, index);
+        index = URIDecodeOctets(octets, two_byte, index);
+      } else  if (reserved(cc)) {
+        %_TwoByteSeqStringSetChar(two_byte, index++, 37);  // '%'.
+        %_TwoByteSeqStringSetChar(two_byte, index++, uri.charCodeAt(k - 1));
+        %_TwoByteSeqStringSetChar(two_byte, index++, uri.charCodeAt(k));
       } else {
-        if (reserved(cc)) {
-          result[index++] = 37; // Char code of '%'.
-          result[index++] = uri.charCodeAt(k - 1);
-          result[index++] = uri.charCodeAt(k);
-        } else {
-          result[index++] = cc;
-        }
+        %_TwoByteSeqStringSetChar(two_byte, index++, cc);
       }
     } else {
-      result[index++] = ch.charCodeAt(0);
+      %_TwoByteSeqStringSetChar(two_byte, index++, code);
     }
   }
-  result.length = index;
-  return %StringFromCharCodeArray(result);
+
+  two_byte = %TruncateString(two_byte, index);
+  return one_byte + two_byte;
 }
 
 
diff --git a/deps/v8/src/utils.h b/deps/v8/src/utils.h
index dc3a171c8d..e03f96f6e5 100644
--- a/deps/v8/src/utils.h
+++ b/deps/v8/src/utils.h
@@ -862,7 +862,11 @@ class EmbeddedContainer {
  public:
   EmbeddedContainer() : elems_() { }
 
-  int length() { return NumElements; }
+  int length() const { return NumElements; }
+  const ElementType& operator[](int i) const {
+    ASSERT(i < length());
+    return elems_[i];
+  }
   ElementType& operator[](int i) {
     ASSERT(i < length());
     return elems_[i];
@@ -876,7 +880,12 @@ class EmbeddedContainer {
 template<typename ElementType>
 class EmbeddedContainer<ElementType, 0> {
  public:
-  int length() { return 0; }
+  int length() const { return 0; }
+  const ElementType& operator[](int i) const {
+    UNREACHABLE();
+    static ElementType t = 0;
+    return t;
+  }
   ElementType& operator[](int i) {
     UNREACHABLE();
     static ElementType t = 0;
@@ -974,7 +983,7 @@ class EnumSet {
   T Mask(E element) const {
     // The strange typing in ASSERT is necessary to avoid stupid warnings, see:
     // http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43680
-    ASSERT(element < static_cast<int>(sizeof(T) * CHAR_BIT));
+    ASSERT(static_cast<int>(element) < static_cast<int>(sizeof(T) * CHAR_BIT));
     return 1 << element;
   }
 
diff --git a/deps/v8/src/v8-counters.cc b/deps/v8/src/v8-counters.cc
index 3f83dffcae..4107dd3e48 100644
--- a/deps/v8/src/v8-counters.cc
+++ b/deps/v8/src/v8-counters.cc
@@ -86,17 +86,6 @@ Counters::Counters() {
     size_of_FIXED_ARRAY_##name##_ = size_of_FIXED_ARRAY_##name;
     FIXED_ARRAY_SUB_INSTANCE_TYPE_LIST(SC)
 #undef SC
-
-  StatsCounter state_counters[] = {
-#define COUNTER_NAME(name) \
-    { "c:V8.State" #name, NULL, false },
-    STATE_TAG_LIST(COUNTER_NAME)
-#undef COUNTER_NAME
-  };
-
-  for (int i = 0; i < kSlidingStateWindowCounterCount; ++i) {
-    state_counters_[i] = state_counters[i];
-  }
 }
 
 void Counters::ResetHistograms() {
diff --git a/deps/v8/src/v8-counters.h b/deps/v8/src/v8-counters.h
index fad3454812..986e6dd6bb 100644
--- a/deps/v8/src/v8-counters.h
+++ b/deps/v8/src/v8-counters.h
@@ -50,7 +50,6 @@ namespace internal {
   HT(compile_eval, V8.CompileEval)                                    \
   HT(compile_lazy, V8.CompileLazy)
 
-
 #define HISTOGRAM_PERCENTAGE_LIST(HP)                                 \
   HP(external_fragmentation_total,                                    \
      V8.MemoryExternalFragmentationTotal)                             \
@@ -374,16 +373,9 @@ class Counters {
     kSizeOfFIXED_ARRAY__##name,
     FIXED_ARRAY_SUB_INSTANCE_TYPE_LIST(COUNTER_ID)
 #undef COUNTER_ID
-#define COUNTER_ID(name) k_##name,
-    STATE_TAG_LIST(COUNTER_ID)
-#undef COUNTER_ID
     stats_counter_count
   };
 
-  StatsCounter* state_counters(StateTag state) {
-    return &state_counters_[state];
-  }
-
   void ResetHistograms();
 
  private:
@@ -426,15 +418,6 @@ class Counters {
   FIXED_ARRAY_SUB_INSTANCE_TYPE_LIST(SC)
 #undef SC
 
-  enum {
-#define COUNTER_ID(name) __##name,
-    STATE_TAG_LIST(COUNTER_ID)
-#undef COUNTER_ID
-    kSlidingStateWindowCounterCount
-  };
-
-  // Sliding state window counters.
-  StatsCounter state_counters_[kSlidingStateWindowCounterCount];
   friend class Isolate;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(Counters);
diff --git a/deps/v8/src/v8.cc b/deps/v8/src/v8.cc
index 2407037b32..b5aad90220 100644
--- a/deps/v8/src/v8.cc
+++ b/deps/v8/src/v8.cc
@@ -38,6 +38,7 @@
 #include "hydrogen.h"
 #include "lithium-allocator.h"
 #include "log.h"
+#include "objects.h"
 #include "once.h"
 #include "platform.h"
 #include "runtime-profiler.h"
@@ -114,6 +115,7 @@ void V8::TearDown() {
 
   ElementsAccessor::TearDown();
   LOperand::TearDownCaches();
+  ExternalReference::TearDownMathExpData();
   RegisteredExtension::UnregisterAll();
 
   is_running_ = false;
@@ -216,14 +218,22 @@ void V8::RemoveCallCompletedCallback(CallCompletedCallback callback) {
 
 
 void V8::FireCallCompletedCallback(Isolate* isolate) {
-  if (call_completed_callbacks_ == NULL) return;
+  bool has_call_completed_callbacks = call_completed_callbacks_ != NULL;
+  bool observer_delivery_pending =
+      FLAG_harmony_observation && isolate->observer_delivery_pending();
+  if (!has_call_completed_callbacks && !observer_delivery_pending) return;
   HandleScopeImplementer* handle_scope_implementer =
       isolate->handle_scope_implementer();
   if (!handle_scope_implementer->CallDepthIsZero()) return;
   // Fire callbacks.  Increase call depth to prevent recursive callbacks.
   handle_scope_implementer->IncrementCallDepth();
-  for (int i = 0; i < call_completed_callbacks_->length(); i++) {
-    call_completed_callbacks_->at(i)();
+  if (observer_delivery_pending) {
+    JSObject::DeliverChangeRecords(isolate);
+  }
+  if (has_call_completed_callbacks) {
+    for (int i = 0; i < call_completed_callbacks_->length(); i++) {
+      call_completed_callbacks_->at(i)();
+    }
   }
   handle_scope_implementer->DecrementCallDepth();
 }
diff --git a/deps/v8/src/v8conversions.cc b/deps/v8/src/v8conversions.cc
index bf175e50b5..c6755d593c 100644
--- a/deps/v8/src/v8conversions.cc
+++ b/deps/v8/src/v8conversions.cc
@@ -84,7 +84,7 @@ double StringToDouble(UnicodeCache* unicode_cache,
                       String* str, int flags, double empty_string_val) {
   StringShape shape(str);
   if (shape.IsSequentialAscii()) {
-    const char* begin = SeqAsciiString::cast(str)->GetChars();
+    const char* begin = SeqOneByteString::cast(str)->GetChars();
     const char* end = begin + str->length();
     return InternalStringToDouble(unicode_cache, begin, end, flags,
                                   empty_string_val);
@@ -109,7 +109,7 @@ double StringToInt(UnicodeCache* unicode_cache,
                    int radix) {
   StringShape shape(str);
   if (shape.IsSequentialAscii()) {
-    const char* begin = SeqAsciiString::cast(str)->GetChars();
+    const char* begin = SeqOneByteString::cast(str)->GetChars();
     const char* end = begin + str->length();
     return InternalStringToInt(unicode_cache, begin, end, radix);
   } else if (shape.IsSequentialTwoByte()) {
diff --git a/deps/v8/src/v8globals.h b/deps/v8/src/v8globals.h
index 3d214f8dd3..5920d33aa8 100644
--- a/deps/v8/src/v8globals.h
+++ b/deps/v8/src/v8globals.h
@@ -52,15 +52,6 @@ const intptr_t kPointerAlignmentMask = kPointerAlignment - 1;
 const intptr_t kDoubleAlignment = 8;
 const intptr_t kDoubleAlignmentMask = kDoubleAlignment - 1;
 
-// Desired alignment for maps.
-#if V8_HOST_ARCH_64_BIT
-const intptr_t kMapAlignmentBits = kObjectAlignmentBits;
-#else
-const intptr_t kMapAlignmentBits = kObjectAlignmentBits + 3;
-#endif
-const intptr_t kMapAlignment = (1 << kMapAlignmentBits);
-const intptr_t kMapAlignmentMask = kMapAlignment - 1;
-
 // Desired alignment for generated code is 32 bytes (to improve cache line
 // utilization).
 const int kCodeAlignmentBits = 5;
@@ -360,20 +351,13 @@ struct AccessorDescriptor {
 // VMState object leaves a state by popping the current state from the
 // stack.
 
-#define STATE_TAG_LIST(V)                       \
-  V(JS)                                         \
-  V(GC)                                         \
-  V(COMPILER)                                   \
-  V(PARALLEL_COMPILER_PROLOGUE)                 \
-  V(OTHER)                                      \
-  V(EXTERNAL)
-
 enum StateTag {
-#define DEF_STATE_TAG(name) name,
-  STATE_TAG_LIST(DEF_STATE_TAG)
-#undef DEF_STATE_TAG
-  // Pseudo-types.
-  state_tag_count
+  JS,
+  GC,
+  COMPILER,
+  PARALLEL_COMPILER,
+  OTHER,
+  EXTERNAL
 };
 
 
@@ -396,10 +380,6 @@ enum StateTag {
 #define POINTER_SIZE_ALIGN(value)                               \
   (((value) + kPointerAlignmentMask) & ~kPointerAlignmentMask)
 
-// MAP_POINTER_ALIGN returns the value aligned as a map pointer.
-#define MAP_POINTER_ALIGN(value)                                \
-  (((value) + kMapAlignmentMask) & ~kMapAlignmentMask)
-
 // CODE_POINTER_ALIGN returns the value aligned as a generated code segment.
 #define CODE_POINTER_ALIGN(value)                               \
   (((value) + kCodeAlignmentMask) & ~kCodeAlignmentMask)
@@ -425,6 +405,13 @@ enum StateTag {
 #endif
 
 
+enum CpuImplementer {
+  UNKNOWN_IMPLEMENTER,
+  ARM_IMPLEMENTER,
+  QUALCOMM_IMPLEMENTER
+};
+
+
 // Feature flags bit positions. They are mostly based on the CPUID spec.
 // (We assign CPUID itself to one of the currently reserved bits --
 // feel free to change this if needed.)
@@ -438,6 +425,9 @@ enum CpuFeature { SSE4_1 = 32 + 19,  // x86
                   VFP3 = 1,    // ARM
                   ARMv7 = 2,   // ARM
                   VFP2 = 3,    // ARM
+                  SUDIV = 4,   // ARM
+                  UNALIGNED_ACCESSES = 5,  // ARM
+                  MOVW_MOVT_IMMEDIATE_LOADS = 6,  // ARM
                   SAHF = 0,    // x86
                   FPU = 1};    // MIPS
 
@@ -486,11 +476,19 @@ enum VariableMode {
 
   CONST,           // declared via 'const' declarations
 
-  LET,             // declared via 'let' declarations
+  LET,             // declared via 'let' declarations (first lexical)
 
   CONST_HARMONY,   // declared via 'const' declarations in harmony mode
 
+  MODULE,          // declared via 'module' declaration (last lexical)
+
   // Variables introduced by the compiler:
+  INTERNAL,        // like VAR, but not user-visible (may or may not
+                   // be in a context)
+
+  TEMPORARY,       // temporary variables (not user-visible), never
+                   // in a context
+
   DYNAMIC,         // always require dynamic lookup (we don't know
                    // the declaration)
 
@@ -498,16 +496,10 @@ enum VariableMode {
                    // variable is global unless it has been shadowed
                    // by an eval-introduced variable
 
-  DYNAMIC_LOCAL,   // requires dynamic lookup, but we know that the
+  DYNAMIC_LOCAL    // requires dynamic lookup, but we know that the
                    // variable is local and where it is unless it
                    // has been shadowed by an eval-introduced
                    // variable
-
-  INTERNAL,        // like VAR, but not user-visible (may or may not
-                   // be in a context)
-
-  TEMPORARY        // temporary variables (not user-visible), never
-                   // in a context
 };
 
 
@@ -517,17 +509,17 @@ inline bool IsDynamicVariableMode(VariableMode mode) {
 
 
 inline bool IsDeclaredVariableMode(VariableMode mode) {
-  return mode >= VAR && mode <= CONST_HARMONY;
+  return mode >= VAR && mode <= MODULE;
 }
 
 
 inline bool IsLexicalVariableMode(VariableMode mode) {
-  return mode >= LET && mode <= CONST_HARMONY;
+  return mode >= LET && mode <= MODULE;
 }
 
 
 inline bool IsImmutableVariableMode(VariableMode mode) {
-  return mode == CONST || mode == CONST_HARMONY;
+  return mode == CONST || (mode >= CONST_HARMONY && mode <= MODULE);
 }
 
 
diff --git a/deps/v8/src/v8natives.js b/deps/v8/src/v8natives.js
index e2e642941e..e8752c84b8 100644
--- a/deps/v8/src/v8natives.js
+++ b/deps/v8/src/v8natives.js
@@ -60,7 +60,17 @@ function InstallFunctions(object, attributes, functions) {
   %ToFastProperties(object);
 }
 
-// Prevents changes to the prototype of a built-infunction.
+
+// Helper function to install a getter only property.
+function InstallGetter(object, name, getter) {
+  %FunctionSetName(getter, name);
+  %FunctionRemovePrototype(getter);
+  %DefineOrRedefineAccessorProperty(object, name, getter, null, DONT_ENUM);
+  %SetNativeFlag(getter);
+}
+
+
+// Prevents changes to the prototype of a built-in function.
 // The "prototype" property of the function object is made non-configurable,
 // and the prototype object is made non-extensible. The latter prevents
 // changing the __proto__ property.
@@ -960,7 +970,7 @@ function ToStringArray(obj, trap) {
   }
   var n = ToUint32(obj.length);
   var array = new $Array(n);
-  var names = {};  // TODO(rossberg): use sets once they are ready.
+  var names = { __proto__: null };  // TODO(rossberg): use sets once ready.
   for (var index = 0; index < n; index++) {
     var s = ToString(obj[index]);
     if (%HasLocalProperty(names, s)) {
@@ -1015,7 +1025,7 @@ function ObjectGetOwnPropertyNames(obj) {
   }
 
   // Property names are expected to be unique strings.
-  var propertySet = {};
+  var propertySet = { __proto__: null };
   var j = 0;
   for (var i = 0; i < propertyNames.length; ++i) {
     var name = ToString(propertyNames[i]);
@@ -1056,7 +1066,7 @@ function ObjectDefineProperty(obj, p, attributes) {
     // Clone the attributes object for protection.
     // TODO(rossberg): not spec'ed yet, so not sure if this should involve
     // non-own properties as it does (or non-enumerable ones, as it doesn't?).
-    var attributesClone = {};
+    var attributesClone = { __proto__: null };
     for (var a in attributes) {
       attributesClone[a] = attributes[a];
     }
@@ -1403,11 +1413,7 @@ function NumberToString(radix) {
 
 // ECMA-262 section 15.7.4.3
 function NumberToLocaleString() {
-  if (IS_NULL_OR_UNDEFINED(this) && !IS_UNDETECTABLE(this)) {
-    throw MakeTypeError("called_on_null_or_undefined",
-                        ["Number.prototype.toLocaleString"]);
-  }
-  return this.toString();
+  return %_CallFunction(this, NumberToString);
 }
 
 
@@ -1424,50 +1430,76 @@ function NumberValueOf() {
 
 // ECMA-262 section 15.7.4.5
 function NumberToFixed(fractionDigits) {
+  var x = this;
+  if (!IS_NUMBER(this)) {
+    if (!IS_NUMBER_WRAPPER(this)) {
+      throw MakeTypeError("incompatible_method_receiver",
+                          ["Number.prototype.toFixed", this]);
+    }
+    // Get the value of this number in case it's an object.
+    x = %_ValueOf(this);
+  }
   var f = TO_INTEGER(fractionDigits);
+
   if (f < 0 || f > 20) {
     throw new $RangeError("toFixed() digits argument must be between 0 and 20");
   }
-  if (IS_NULL_OR_UNDEFINED(this) && !IS_UNDETECTABLE(this)) {
-    throw MakeTypeError("called_on_null_or_undefined",
-                        ["Number.prototype.toFixed"]);
-  }
-  var x = ToNumber(this);
+
+  if (NUMBER_IS_NAN(x)) return "NaN";
+  if (x == 1/0) return "Infinity";
+  if (x == -1/0) return "-Infinity";
+
   return %NumberToFixed(x, f);
 }
 
 
 // ECMA-262 section 15.7.4.6
 function NumberToExponential(fractionDigits) {
-  var f = -1;
-  if (!IS_UNDEFINED(fractionDigits)) {
-    f = TO_INTEGER(fractionDigits);
-    if (f < 0 || f > 20) {
-      throw new $RangeError(
-          "toExponential() argument must be between 0 and 20");
+  var x = this;
+  if (!IS_NUMBER(this)) {
+    if (!IS_NUMBER_WRAPPER(this)) {
+      throw MakeTypeError("incompatible_method_receiver",
+                          ["Number.prototype.toExponential", this]);
     }
+    // Get the value of this number in case it's an object.
+    x = %_ValueOf(this);
   }
-  if (IS_NULL_OR_UNDEFINED(this) && !IS_UNDETECTABLE(this)) {
-    throw MakeTypeError("called_on_null_or_undefined",
-                        ["Number.prototype.toExponential"]);
+  var f = IS_UNDEFINED(fractionDigits) ? void 0 : TO_INTEGER(fractionDigits);
+
+  if (NUMBER_IS_NAN(x)) return "NaN";
+  if (x == 1/0) return "Infinity";
+  if (x == -1/0) return "-Infinity";
+
+  if (IS_UNDEFINED(f)) {
+    f = -1;  // Signal for runtime function that f is not defined.
+  } else if (f < 0 || f > 20) {
+    throw new $RangeError("toExponential() argument must be between 0 and 20");
   }
-  var x = ToNumber(this);
   return %NumberToExponential(x, f);
 }
 
 
 // ECMA-262 section 15.7.4.7
 function NumberToPrecision(precision) {
-  if (IS_NULL_OR_UNDEFINED(this) && !IS_UNDETECTABLE(this)) {
-    throw MakeTypeError("called_on_null_or_undefined",
-                        ["Number.prototype.toPrecision"]);
+  var x = this;
+  if (!IS_NUMBER(this)) {
+    if (!IS_NUMBER_WRAPPER(this)) {
+      throw MakeTypeError("incompatible_method_receiver",
+                          ["Number.prototype.toPrecision", this]);
+    }
+    // Get the value of this number in case it's an object.
+    x = %_ValueOf(this);
   }
   if (IS_UNDEFINED(precision)) return ToString(%_ValueOf(this));
   var p = TO_INTEGER(precision);
+
+  if (NUMBER_IS_NAN(x)) return "NaN";
+  if (x == 1/0) return "Infinity";
+  if (x == -1/0) return "-Infinity";
+
   if (p < 1 || p > 21) {
     throw new $RangeError("toPrecision() argument must be between 1 and 21");
   }
-  var x = ToNumber(this);
   return %NumberToPrecision(x, p);
 }
 
diff --git a/deps/v8/src/variables.cc b/deps/v8/src/variables.cc
index 0416f3a390..9161217917 100644
--- a/deps/v8/src/variables.cc
+++ b/deps/v8/src/variables.cc
@@ -41,8 +41,9 @@ const char* Variable::Mode2String(VariableMode mode) {
   switch (mode) {
     case VAR: return "VAR";
     case CONST: return "CONST";
-    case CONST_HARMONY: return "CONST_HARMONY";
     case LET: return "LET";
+    case CONST_HARMONY: return "CONST_HARMONY";
+    case MODULE: return "MODULE";
     case DYNAMIC: return "DYNAMIC";
     case DYNAMIC_GLOBAL: return "DYNAMIC_GLOBAL";
     case DYNAMIC_LOCAL: return "DYNAMIC_LOCAL";
@@ -84,7 +85,8 @@ Variable::Variable(Scope* scope,
 bool Variable::IsGlobalObjectProperty() const {
   // Temporaries are never global, they must always be allocated in the
   // activation frame.
-  return mode_ != TEMPORARY && !IsLexicalVariableMode(mode_)
+  return (IsDynamicVariableMode(mode_) ||
+          (IsDeclaredVariableMode(mode_) && !IsLexicalVariableMode(mode_)))
       && scope_ != NULL && scope_->is_global_scope();
 }
 
diff --git a/deps/v8/src/variables.h b/deps/v8/src/variables.h
index ba26b80472..bb35ee88b5 100644
--- a/deps/v8/src/variables.h
+++ b/deps/v8/src/variables.h
@@ -130,8 +130,8 @@ class Variable: public ZoneObject {
   bool is_arguments() const { return kind_ == ARGUMENTS; }
 
   // True if the variable is named eval and not known to be shadowed.
-  bool is_possibly_eval() const {
-    return IsVariable(FACTORY->eval_symbol());
+  bool is_possibly_eval(Isolate* isolate) const {
+    return IsVariable(isolate->factory()->eval_symbol());
   }
 
   Variable* local_if_not_shadowed() const {
diff --git a/deps/v8/src/version.cc b/deps/v8/src/version.cc
index c8c8fc30b0..61cf9ea271 100644
--- a/deps/v8/src/version.cc
+++ b/deps/v8/src/version.cc
@@ -33,9 +33,9 @@
 // NOTE these macros are used by the SCons build script so their names
 // cannot be changed without changing the SCons build script.
 #define MAJOR_VERSION     3
-#define MINOR_VERSION     13
-#define BUILD_NUMBER      7
-#define PATCH_LEVEL       4
+#define MINOR_VERSION     15
+#define BUILD_NUMBER      11
+#define PATCH_LEVEL       0
 // Use 1 for candidates and 0 otherwise.
 // (Boolean macro values are not supported by all preprocessors.)
 #define IS_CANDIDATE_VERSION 0
diff --git a/deps/v8/src/vm-state-inl.h b/deps/v8/src/vm-state-inl.h
index 384940dfa5..bc481605fb 100644
--- a/deps/v8/src/vm-state-inl.h
+++ b/deps/v8/src/vm-state-inl.h
@@ -47,8 +47,8 @@ inline const char* StateToString(StateTag state) {
       return "GC";
     case COMPILER:
       return "COMPILER";
-    case PARALLEL_COMPILER_PROLOGUE:
-      return "PARALLEL_COMPILER_PROLOGUE";
+    case PARALLEL_COMPILER:
+      return "PARALLEL_COMPILER";
     case OTHER:
       return "OTHER";
     case EXTERNAL:
@@ -67,6 +67,10 @@ VMState::VMState(Isolate* isolate, StateTag tag)
     LOG(isolate, UncheckedStringEvent("From", StateToString(previous_tag_)));
   }
 
+  if (FLAG_log_timer_events) {
+    LOG(isolate, ExternalSwitch(previous_tag_, tag));
+  }
+
   isolate_->SetCurrentVMState(tag);
 }
 
@@ -80,6 +84,10 @@ VMState::~VMState() {
         UncheckedStringEvent("To", StateToString(previous_tag_)));
   }
 
+  if (FLAG_log_timer_events) {
+    LOG(isolate_, ExternalSwitch(isolate_->current_vm_state(), previous_tag_));
+  }
+
   isolate_->SetCurrentVMState(previous_tag_);
 }
 
diff --git a/deps/v8/src/x64/assembler-x64-inl.h b/deps/v8/src/x64/assembler-x64-inl.h
index f3940e8255..f86417469f 100644
--- a/deps/v8/src/x64/assembler-x64-inl.h
+++ b/deps/v8/src/x64/assembler-x64-inl.h
@@ -42,6 +42,9 @@ namespace internal {
 // Implementation of Assembler
 
 
+static const byte kCallOpcode = 0xE8;
+
+
 void Assembler::emitl(uint32_t x) {
   Memory::uint32_at(pc_) = x;
   pc_ += sizeof(uint32_t);
@@ -195,6 +198,12 @@ void Assembler::set_target_address_at(Address pc, Address target) {
   CPU::FlushICache(pc, sizeof(int32_t));
 }
 
+
+Address Assembler::target_address_from_return_address(Address pc) {
+  return pc - kCallTargetAddressOffset;
+}
+
+
 Handle<Object> Assembler::code_target_object_handle_at(Address pc) {
   return code_targets_[Memory::int32_at(pc)];
 }
@@ -211,6 +220,12 @@ void RelocInfo::apply(intptr_t delta) {
   } else if (IsCodeTarget(rmode_)) {
     Memory::int32_at(pc_) -= static_cast<int32_t>(delta);
     CPU::FlushICache(pc_, sizeof(int32_t));
+  } else if (rmode_ == CODE_AGE_SEQUENCE) {
+    if (*pc_ == kCallOpcode) {
+      int32_t* p = reinterpret_cast<int32_t*>(pc_ + 1);
+      *p -= static_cast<int32_t>(delta);  // Relocate entry.
+      CPU::FlushICache(p, sizeof(uint32_t));
+    }
   }
 }
 
@@ -349,6 +364,21 @@ bool RelocInfo::IsPatchedDebugBreakSlotSequence() {
 }
 
 
+Code* RelocInfo::code_age_stub() {
+  ASSERT(rmode_ == RelocInfo::CODE_AGE_SEQUENCE);
+  ASSERT(*pc_ == kCallOpcode);
+  return Code::GetCodeFromTargetAddress(
+      Assembler::target_address_at(pc_ + 1));
+}
+
+
+void RelocInfo::set_code_age_stub(Code* stub) {
+  ASSERT(*pc_ == kCallOpcode);
+  ASSERT(rmode_ == RelocInfo::CODE_AGE_SEQUENCE);
+  Assembler::set_target_address_at(pc_ + 1, stub->instruction_start());
+}
+
+
 Address RelocInfo::call_address() {
   ASSERT((IsJSReturn(rmode()) && IsPatchedReturnSequence()) ||
          (IsDebugBreakSlot(rmode()) && IsPatchedDebugBreakSlotSequence()));
@@ -402,6 +432,8 @@ void RelocInfo::Visit(ObjectVisitor* visitor) {
   } else if (mode == RelocInfo::EXTERNAL_REFERENCE) {
     visitor->VisitExternalReference(this);
     CPU::FlushICache(pc_, sizeof(Address));
+  } else if (RelocInfo::IsCodeAgeSequence(mode)) {
+    visitor->VisitCodeAgeSequence(this);
 #ifdef ENABLE_DEBUGGER_SUPPORT
   // TODO(isolates): Get a cached isolate below.
   } else if (((RelocInfo::IsJSReturn(mode) &&
@@ -430,6 +462,8 @@ void RelocInfo::Visit(Heap* heap) {
   } else if (mode == RelocInfo::EXTERNAL_REFERENCE) {
     StaticVisitor::VisitExternalReference(this);
     CPU::FlushICache(pc_, sizeof(Address));
+  } else if (RelocInfo::IsCodeAgeSequence(mode)) {
+    StaticVisitor::VisitCodeAgeSequence(heap, this);
 #ifdef ENABLE_DEBUGGER_SUPPORT
   } else if (heap->isolate()->debug()->has_break_points() &&
              ((RelocInfo::IsJSReturn(mode) &&
diff --git a/deps/v8/src/x64/assembler-x64.cc b/deps/v8/src/x64/assembler-x64.cc
index 862a735579..370cb02a36 100644
--- a/deps/v8/src/x64/assembler-x64.cc
+++ b/deps/v8/src/x64/assembler-x64.cc
@@ -346,50 +346,20 @@ bool Operand::AddressUsesRegister(Register reg) const {
 static void InitCoverageLog();
 #endif
 
-Assembler::Assembler(Isolate* arg_isolate, void* buffer, int buffer_size)
-    : AssemblerBase(arg_isolate),
+Assembler::Assembler(Isolate* isolate, void* buffer, int buffer_size)
+    : AssemblerBase(isolate, buffer, buffer_size),
       code_targets_(100),
-      positions_recorder_(this),
-      emit_debug_code_(FLAG_debug_code),
-      predictable_code_size_(false) {
-  if (buffer == NULL) {
-    // Do our own buffer management.
-    if (buffer_size <= kMinimalBufferSize) {
-      buffer_size = kMinimalBufferSize;
-
-      if (isolate() != NULL && isolate()->assembler_spare_buffer() != NULL) {
-        buffer = isolate()->assembler_spare_buffer();
-        isolate()->set_assembler_spare_buffer(NULL);
-      }
-    }
-    if (buffer == NULL) {
-      buffer_ = NewArray<byte>(buffer_size);
-    } else {
-      buffer_ = static_cast<byte*>(buffer);
-    }
-    buffer_size_ = buffer_size;
-    own_buffer_ = true;
-  } else {
-    // Use externally provided buffer instead.
-    ASSERT(buffer_size > 0);
-    buffer_ = static_cast<byte*>(buffer);
-    buffer_size_ = buffer_size;
-    own_buffer_ = false;
-  }
-
+      positions_recorder_(this) {
   // Clear the buffer in debug mode unless it was provided by the
   // caller in which case we can't be sure it's okay to overwrite
   // existing code in it.
 #ifdef DEBUG
   if (own_buffer_) {
-    memset(buffer_, 0xCC, buffer_size);  // int3
+    memset(buffer_, 0xCC, buffer_size_);  // int3
   }
 #endif
 
-  // Set up buffer pointers.
-  ASSERT(buffer_ != NULL);
-  pc_ = buffer_;
-  reloc_info_writer.Reposition(buffer_ + buffer_size, pc_);
+  reloc_info_writer.Reposition(buffer_ + buffer_size_, pc_);
 
 
 #ifdef GENERATED_CODE_COVERAGE
@@ -398,19 +368,6 @@ Assembler::Assembler(Isolate* arg_isolate, void* buffer, int buffer_size)
 }
 
 
-Assembler::~Assembler() {
-  if (own_buffer_) {
-    if (isolate() != NULL &&
-        isolate()->assembler_spare_buffer() == NULL &&
-        buffer_size_ == kMinimalBufferSize) {
-      isolate()->set_assembler_spare_buffer(buffer_);
-    } else {
-      DeleteArray(buffer_);
-    }
-  }
-}
-
-
 void Assembler::GetCode(CodeDesc* desc) {
   // Finalize code (at this point overflow() may be true, but the gap ensures
   // that we are still not overlapping instructions and relocation info).
@@ -1238,13 +1195,13 @@ void Assembler::j(Condition cc, Label* L, Label::Distance distance) {
     // Determine whether we can use 1-byte offsets for backwards branches,
     // which have a max range of 128 bytes.
 
-    // We also need to check the predictable_code_size_ flag here, because
-    // on x64, when the full code generator recompiles code for debugging, some
-    // places need to be padded out to a certain size. The debugger is keeping
-    // track of how often it did this so that it can adjust return addresses on
-    // the stack, but if the size of jump instructions can also change, that's
-    // not enough and the calculated offsets would be incorrect.
-    if (is_int8(offs - short_size) && !predictable_code_size_) {
+    // We also need to check predictable_code_size() flag here, because on x64,
+    // when the full code generator recompiles code for debugging, some places
+    // need to be padded out to a certain size. The debugger is keeping track of
+    // how often it did this so that it can adjust return addresses on the
+    // stack, but if the size of jump instructions can also change, that's not
+    // enough and the calculated offsets would be incorrect.
+    if (is_int8(offs - short_size) && !predictable_code_size()) {
       // 0111 tttn #8-bit disp.
       emit(0x70 | cc);
       emit((offs - short_size) & 0xFF);
@@ -1301,7 +1258,7 @@ void Assembler::jmp(Label* L, Label::Distance distance) {
   if (L->is_bound()) {
     int offs = L->pos() - pc_offset() - 1;
     ASSERT(offs <= 0);
-    if (is_int8(offs - short_size) && !predictable_code_size_) {
+    if (is_int8(offs - short_size) && !predictable_code_size()) {
       // 1110 1011 #8-bit disp.
       emit(0xEB);
       emit((offs - short_size) & 0xFF);
@@ -2850,6 +2807,16 @@ void Assembler::addsd(XMMRegister dst, XMMRegister src) {
 }
 
 
+void Assembler::addsd(XMMRegister dst, const Operand& src) {
+  EnsureSpace ensure_space(this);
+  emit(0xF2);
+  emit_optional_rex_32(dst, src);
+  emit(0x0F);
+  emit(0x58);
+  emit_sse_operand(dst, src);
+}
+
+
 void Assembler::mulsd(XMMRegister dst, XMMRegister src) {
   EnsureSpace ensure_space(this);
   emit(0xF2);
@@ -2860,6 +2827,16 @@ void Assembler::mulsd(XMMRegister dst, XMMRegister src) {
 }
 
 
+void Assembler::mulsd(XMMRegister dst, const Operand& src) {
+  EnsureSpace ensure_space(this);
+  emit(0xF2);
+  emit_optional_rex_32(dst, src);
+  emit(0x0F);
+  emit(0x59);
+  emit_sse_operand(dst, src);
+}
+
+
 void Assembler::subsd(XMMRegister dst, XMMRegister src) {
   EnsureSpace ensure_space(this);
   emit(0xF2);
@@ -3047,7 +3024,8 @@ void Assembler::RecordComment(const char* msg, bool force) {
 
 
 const int RelocInfo::kApplyMask = RelocInfo::kCodeTargetMask |
-                                  1 << RelocInfo::INTERNAL_REFERENCE;
+    1 << RelocInfo::INTERNAL_REFERENCE |
+    1 << RelocInfo::CODE_AGE_SEQUENCE;
 
 
 bool RelocInfo::IsCodedSpecially() {
diff --git a/deps/v8/src/x64/assembler-x64.h b/deps/v8/src/x64/assembler-x64.h
index e00b403199..24c8df368f 100644
--- a/deps/v8/src/x64/assembler-x64.h
+++ b/deps/v8/src/x64/assembler-x64.h
@@ -556,15 +556,7 @@ class Assembler : public AssemblerBase {
   // is too small, a fatal error occurs. No deallocation of the buffer is done
   // upon destruction of the assembler.
   Assembler(Isolate* isolate, void* buffer, int buffer_size);
-  ~Assembler();
-
-  // Overrides the default provided by FLAG_debug_code.
-  void set_emit_debug_code(bool value) { emit_debug_code_ = value; }
-
-  // Avoids using instructions that vary in size in unpredictable ways between
-  // the snapshot and the running VM.  This is needed by the full compiler so
-  // that it can recompile code with debug support and fix the PC.
-  void set_predictable_code_size(bool value) { predictable_code_size_ = value; }
+  virtual ~Assembler() { }
 
   // GetCode emits any pending (non-emitted) code and fills the descriptor
   // desc. GetCode() is idempotent; it returns the same result if no other
@@ -581,6 +573,10 @@ class Assembler : public AssemblerBase {
   static inline Address target_address_at(Address pc);
   static inline void set_target_address_at(Address pc, Address target);
 
+  // Return the code target address at a call site from the return address
+  // of that call in the instruction stream.
+  static inline Address target_address_from_return_address(Address pc);
+
   // This sets the branch destination (which is in the instruction on x64).
   // This is for calls and branches within generated code.
   inline static void deserialization_set_special_target_at(
@@ -620,6 +616,7 @@ class Assembler : public AssemblerBase {
   static const int kCallInstructionLength = 13;
   static const int kJSReturnSequenceLength = 13;
   static const int kShortCallInstructionLength = 5;
+  static const int kPatchDebugBreakSlotReturnOffset = 4;
 
   // The debug break slot must be able to contain a call instruction.
   static const int kDebugBreakSlotLength = kCallInstructionLength;
@@ -1016,6 +1013,14 @@ class Assembler : public AssemblerBase {
     shift(dst, imm8, 0x1);
   }
 
+  void rorl(Register dst, Immediate imm8) {
+    shift_32(dst, imm8, 0x1);
+  }
+
+  void rorl_cl(Register dst) {
+    shift_32(dst, 0x1);
+  }
+
   // Shifts dst:src left by cl bits, affecting only dst.
   void shld(Register dst, Register src);
 
@@ -1358,8 +1363,10 @@ class Assembler : public AssemblerBase {
   void cvtsd2siq(Register dst, XMMRegister src);
 
   void addsd(XMMRegister dst, XMMRegister src);
+  void addsd(XMMRegister dst, const Operand& src);
   void subsd(XMMRegister dst, XMMRegister src);
   void mulsd(XMMRegister dst, XMMRegister src);
+  void mulsd(XMMRegister dst, const Operand& src);
   void divsd(XMMRegister dst, XMMRegister src);
 
   void andpd(XMMRegister dst, XMMRegister src);
@@ -1411,8 +1418,6 @@ class Assembler : public AssemblerBase {
   void db(uint8_t data);
   void dd(uint32_t data);
 
-  int pc_offset() const { return static_cast<int>(pc_ - buffer_); }
-
   PositionsRecorder* positions_recorder() { return &positions_recorder_; }
 
   // Check if there is less than kGap bytes available in the buffer.
@@ -1431,15 +1436,10 @@ class Assembler : public AssemblerBase {
 
   // Avoid overflows for displacements etc.
   static const int kMaximalBufferSize = 512*MB;
-  static const int kMinimalBufferSize = 4*KB;
 
   byte byte_at(int pos)  { return buffer_[pos]; }
   void set_byte_at(int pos, byte value) { buffer_[pos] = value; }
 
- protected:
-  bool emit_debug_code() const { return emit_debug_code_; }
-  bool predictable_code_size() const { return predictable_code_size_; }
-
  private:
   byte* addr_at(int pos)  { return buffer_ + pos; }
   uint32_t long_at(int pos)  {
@@ -1627,24 +1627,12 @@ class Assembler : public AssemblerBase {
   friend class EnsureSpace;
   friend class RegExpMacroAssemblerX64;
 
-  // Code buffer:
-  // The buffer into which code and relocation info are generated.
-  byte* buffer_;
-  int buffer_size_;
-  // True if the assembler owns the buffer, false if buffer is external.
-  bool own_buffer_;
-
   // code generation
-  byte* pc_;  // the program counter; moves forward
   RelocInfoWriter reloc_info_writer;
 
   List< Handle<Code> > code_targets_;
 
   PositionsRecorder positions_recorder_;
-
-  bool emit_debug_code_;
-  bool predictable_code_size_;
-
   friend class PositionsRecorder;
 };
 
diff --git a/deps/v8/src/x64/builtins-x64.cc b/deps/v8/src/x64/builtins-x64.cc
index 9e4153a868..ed0ec684fc 100644
--- a/deps/v8/src/x64/builtins-x64.cc
+++ b/deps/v8/src/x64/builtins-x64.cc
@@ -606,6 +606,46 @@ void Builtins::Generate_LazyRecompile(MacroAssembler* masm) {
 }
 
 
+static void GenerateMakeCodeYoungAgainCommon(MacroAssembler* masm) {
+  // For now, we are relying on the fact that make_code_young doesn't do any
+  // garbage collection which allows us to save/restore the registers without
+  // worrying about which of them contain pointers. We also don't build an
+  // internal frame to make the code faster, since we shouldn't have to do stack
+  // crawls in MakeCodeYoung. This seems a bit fragile.
+
+  // Re-execute the code that was patched back to the young age when
+  // the stub returns.
+  __ subq(Operand(rsp, 0), Immediate(5));
+  __ Pushad();
+#ifdef _WIN64
+  __ movq(rcx, Operand(rsp, kNumSafepointRegisters * kPointerSize));
+#else
+  __ movq(rdi, Operand(rsp, kNumSafepointRegisters * kPointerSize));
+#endif
+  {  // NOLINT
+    FrameScope scope(masm, StackFrame::MANUAL);
+    __ PrepareCallCFunction(1);
+    __ CallCFunction(
+        ExternalReference::get_make_code_young_function(masm->isolate()), 1);
+  }
+  __ Popad();
+  __ ret(0);
+}
+
+
+#define DEFINE_CODE_AGE_BUILTIN_GENERATOR(C)                 \
+void Builtins::Generate_Make##C##CodeYoungAgainEvenMarking(  \
+    MacroAssembler* masm) {                                  \
+  GenerateMakeCodeYoungAgainCommon(masm);                    \
+}                                                            \
+void Builtins::Generate_Make##C##CodeYoungAgainOddMarking(   \
+    MacroAssembler* masm) {                                  \
+  GenerateMakeCodeYoungAgainCommon(masm);                    \
+}
+CODE_AGE_LIST(DEFINE_CODE_AGE_BUILTIN_GENERATOR)
+#undef DEFINE_CODE_AGE_BUILTIN_GENERATOR
+
+
 static void Generate_NotifyDeoptimizedHelper(MacroAssembler* masm,
                                              Deoptimizer::BailoutType type) {
   // Enter an internal frame.
diff --git a/deps/v8/src/x64/code-stubs-x64.cc b/deps/v8/src/x64/code-stubs-x64.cc
index 3fa93b2983..970571840b 100644
--- a/deps/v8/src/x64/code-stubs-x64.cc
+++ b/deps/v8/src/x64/code-stubs-x64.cc
@@ -637,6 +637,10 @@ void ToBooleanStub::GenerateTypeTransition(MacroAssembler* masm) {
 
 class FloatingPointHelper : public AllStatic {
  public:
+  enum ConvertUndefined {
+    CONVERT_UNDEFINED_TO_ZERO,
+    BAILOUT_ON_UNDEFINED
+  };
   // Load the operands from rdx and rax into xmm0 and xmm1, as doubles.
   // If the operands are not both numbers, jump to not_numbers.
   // Leaves rdx and rax unchanged.  SmiOperands assumes both are smis.
@@ -672,7 +676,8 @@ class FloatingPointHelper : public AllStatic {
                             Register scratch2,
                             Register scratch3,
                             Label* on_success,
-                            Label* on_not_smis);
+                            Label* on_not_smis,
+                            ConvertUndefined convert_undefined);
 };
 
 
@@ -997,16 +1002,15 @@ void UnaryOpStub::PrintName(StringStream* stream) {
 }
 
 
+void BinaryOpStub::Initialize() {}
+
+
 void BinaryOpStub::GenerateTypeTransition(MacroAssembler* masm) {
   __ pop(rcx);  // Save return address.
   __ push(rdx);
   __ push(rax);
   // Left and right arguments are now on top.
-  // Push this stub's key. Although the operation and the type info are
-  // encoded into the key, the encoding is opaque, so push them too.
   __ Push(Smi::FromInt(MinorKey()));
-  __ Push(Smi::FromInt(op_));
-  __ Push(Smi::FromInt(operands_type_));
 
   __ push(rcx);  // Push return address.
 
@@ -1015,69 +1019,16 @@ void BinaryOpStub::GenerateTypeTransition(MacroAssembler* masm) {
   __ TailCallExternalReference(
       ExternalReference(IC_Utility(IC::kBinaryOp_Patch),
                         masm->isolate()),
-      5,
+      3,
       1);
 }
 
 
-void BinaryOpStub::Generate(MacroAssembler* masm) {
-  // Explicitly allow generation of nested stubs. It is safe here because
-  // generation code does not use any raw pointers.
-  AllowStubCallsScope allow_stub_calls(masm, true);
-
-  switch (operands_type_) {
-    case BinaryOpIC::UNINITIALIZED:
-      GenerateTypeTransition(masm);
-      break;
-    case BinaryOpIC::SMI:
-      GenerateSmiStub(masm);
-      break;
-    case BinaryOpIC::INT32:
-      UNREACHABLE();
-      // The int32 case is identical to the Smi case.  We avoid creating this
-      // ic state on x64.
-      break;
-    case BinaryOpIC::HEAP_NUMBER:
-      GenerateHeapNumberStub(masm);
-      break;
-    case BinaryOpIC::ODDBALL:
-      GenerateOddballStub(masm);
-      break;
-    case BinaryOpIC::BOTH_STRING:
-      GenerateBothStringStub(masm);
-      break;
-    case BinaryOpIC::STRING:
-      GenerateStringStub(masm);
-      break;
-    case BinaryOpIC::GENERIC:
-      GenerateGeneric(masm);
-      break;
-    default:
-      UNREACHABLE();
-  }
-}
-
-
-void BinaryOpStub::PrintName(StringStream* stream) {
-  const char* op_name = Token::Name(op_);
-  const char* overwrite_name;
-  switch (mode_) {
-    case NO_OVERWRITE: overwrite_name = "Alloc"; break;
-    case OVERWRITE_RIGHT: overwrite_name = "OverwriteRight"; break;
-    case OVERWRITE_LEFT: overwrite_name = "OverwriteLeft"; break;
-    default: overwrite_name = "UnknownOverwrite"; break;
-  }
-  stream->Add("BinaryOpStub_%s_%s_%s",
-              op_name,
-              overwrite_name,
-              BinaryOpIC::GetName(operands_type_));
-}
-
-
-void BinaryOpStub::GenerateSmiCode(
+static void BinaryOpStub_GenerateSmiCode(
     MacroAssembler* masm,
     Label* slow,
-    SmiCodeGenerateHeapNumberResults allow_heapnumber_results) {
+    BinaryOpStub::SmiCodeGenerateHeapNumberResults allow_heapnumber_results,
+    Token::Value op) {
 
   // Arguments to BinaryOpStub are in rdx and rax.
   const Register left = rdx;
@@ -1086,9 +1037,9 @@ void BinaryOpStub::GenerateSmiCode(
   // We only generate heapnumber answers for overflowing calculations
   // for the four basic arithmetic operations and logical right shift by 0.
   bool generate_inline_heapnumber_results =
-      (allow_heapnumber_results == ALLOW_HEAPNUMBER_RESULTS) &&
-      (op_ == Token::ADD || op_ == Token::SUB ||
-       op_ == Token::MUL || op_ == Token::DIV || op_ == Token::SHR);
+      (allow_heapnumber_results == BinaryOpStub::ALLOW_HEAPNUMBER_RESULTS) &&
+      (op == Token::ADD || op == Token::SUB ||
+       op == Token::MUL || op == Token::DIV || op == Token::SHR);
 
   // Smi check of both operands.  If op is BIT_OR, the check is delayed
   // until after the OR operation.
@@ -1096,7 +1047,7 @@ void BinaryOpStub::GenerateSmiCode(
   Label use_fp_on_smis;
   Label fail;
 
-  if (op_ != Token::BIT_OR) {
+  if (op != Token::BIT_OR) {
     Comment smi_check_comment(masm, "-- Smi check arguments");
     __ JumpIfNotBothSmi(left, right, &not_smis);
   }
@@ -1105,7 +1056,7 @@ void BinaryOpStub::GenerateSmiCode(
   __ bind(&smi_values);
   // Perform the operation.
   Comment perform_smi(masm, "-- Perform smi operation");
-  switch (op_) {
+  switch (op) {
     case Token::ADD:
       ASSERT(right.is(rax));
       __ SmiAdd(right, right, left, &use_fp_on_smis);  // ADD is commutative.
@@ -1177,7 +1128,7 @@ void BinaryOpStub::GenerateSmiCode(
     //    operations on known smis (e.g., if the result of the operation
     //    overflowed the smi range).
     __ bind(&use_fp_on_smis);
-    if (op_ == Token::DIV || op_ == Token::MOD) {
+    if (op == Token::DIV || op == Token::MOD) {
       // Restore left and right to rdx and rax.
       __ movq(rdx, rcx);
       __ movq(rax, rbx);
@@ -1186,12 +1137,12 @@ void BinaryOpStub::GenerateSmiCode(
     if (generate_inline_heapnumber_results) {
       __ AllocateHeapNumber(rcx, rbx, slow);
       Comment perform_float(masm, "-- Perform float operation on smis");
-      if (op_ == Token::SHR) {
+      if (op == Token::SHR) {
         __ SmiToInteger32(left, left);
         __ cvtqsi2sd(xmm0, left);
       } else {
         FloatingPointHelper::LoadSSE2SmiOperands(masm);
-        switch (op_) {
+        switch (op) {
         case Token::ADD: __ addsd(xmm0, xmm1); break;
         case Token::SUB: __ subsd(xmm0, xmm1); break;
         case Token::MUL: __ mulsd(xmm0, xmm1); break;
@@ -1214,31 +1165,50 @@ void BinaryOpStub::GenerateSmiCode(
   //    values that could be smi.
   __ bind(&not_smis);
   Comment done_comment(masm, "-- Enter non-smi code");
+  FloatingPointHelper::ConvertUndefined convert_undefined =
+      FloatingPointHelper::BAILOUT_ON_UNDEFINED;
+  // This list must be in sync with BinaryOpPatch() behavior in ic.cc.
+  if (op == Token::BIT_AND ||
+      op == Token::BIT_OR ||
+      op == Token::BIT_XOR ||
+      op == Token::SAR ||
+      op == Token::SHL ||
+      op == Token::SHR) {
+    convert_undefined = FloatingPointHelper::CONVERT_UNDEFINED_TO_ZERO;
+  }
   FloatingPointHelper::NumbersToSmis(masm, left, right, rbx, rdi, rcx,
-                                     &smi_values, &fail);
+                                     &smi_values, &fail, convert_undefined);
   __ jmp(&smi_values);
   __ bind(&fail);
 }
 
 
-void BinaryOpStub::GenerateFloatingPointCode(MacroAssembler* masm,
-                                             Label* allocation_failure,
-                                             Label* non_numeric_failure) {
-  switch (op_) {
+static void BinaryOpStub_GenerateHeapResultAllocation(MacroAssembler* masm,
+                                                      Label* alloc_failure,
+                                                      OverwriteMode mode);
+
+
+static void BinaryOpStub_GenerateFloatingPointCode(MacroAssembler* masm,
+                                                   Label* allocation_failure,
+                                                   Label* non_numeric_failure,
+                                                   Token::Value op,
+                                                   OverwriteMode mode) {
+  switch (op) {
     case Token::ADD:
     case Token::SUB:
     case Token::MUL:
     case Token::DIV: {
       FloatingPointHelper::LoadSSE2UnknownOperands(masm, non_numeric_failure);
 
-      switch (op_) {
+      switch (op) {
         case Token::ADD: __ addsd(xmm0, xmm1); break;
         case Token::SUB: __ subsd(xmm0, xmm1); break;
         case Token::MUL: __ mulsd(xmm0, xmm1); break;
         case Token::DIV: __ divsd(xmm0, xmm1); break;
         default: UNREACHABLE();
       }
-      GenerateHeapResultAllocation(masm, allocation_failure);
+      BinaryOpStub_GenerateHeapResultAllocation(
+          masm, allocation_failure, mode);
       __ movsd(FieldOperand(rax, HeapNumber::kValueOffset), xmm0);
       __ ret(0);
       break;
@@ -1259,7 +1229,7 @@ void BinaryOpStub::GenerateFloatingPointCode(MacroAssembler* masm,
       __ LoadRoot(heap_number_map, Heap::kHeapNumberMapRootIndex);
       FloatingPointHelper::LoadAsIntegers(masm, non_numeric_failure,
                                           heap_number_map);
-      switch (op_) {
+      switch (op) {
         case Token::BIT_OR:  __ orl(rax, rcx); break;
         case Token::BIT_AND: __ andl(rax, rcx); break;
         case Token::BIT_XOR: __ xorl(rax, rcx); break;
@@ -1283,7 +1253,7 @@ void BinaryOpStub::GenerateFloatingPointCode(MacroAssembler* masm,
       // Logical shift right can produce an unsigned int32 that is not
       // an int32, and so is not in the smi range.  Allocate a heap number
       // in that case.
-      if (op_ == Token::SHR) {
+      if (op == Token::SHR) {
         __ bind(&non_smi_shr_result);
         Label allocation_failed;
         __ movl(rbx, rax);  // rbx holds result value (uint32 value as int64).
@@ -1297,11 +1267,9 @@ void BinaryOpStub::GenerateFloatingPointCode(MacroAssembler* masm,
                               &allocation_failed,
                               TAG_OBJECT);
         // Set the map.
-        if (FLAG_debug_code) {
-          __ AbortIfNotRootValue(heap_number_map,
-                                 Heap::kHeapNumberMapRootIndex,
-                                 "HeapNumberMap register clobbered.");
-        }
+        __ AssertRootValue(heap_number_map,
+                           Heap::kHeapNumberMapRootIndex,
+                           "HeapNumberMap register clobbered.");
         __ movq(FieldOperand(rax, HeapObject::kMapOffset),
                 heap_number_map);
         __ cvtqsi2sd(xmm0, rbx);
@@ -1322,12 +1290,12 @@ void BinaryOpStub::GenerateFloatingPointCode(MacroAssembler* masm,
   // No fall-through from this generated code.
   if (FLAG_debug_code) {
     __ Abort("Unexpected fall-through in "
-             "BinaryStub::GenerateFloatingPointCode.");
+             "BinaryStub_GenerateFloatingPointCode.");
   }
 }
 
 
-void BinaryOpStub::GenerateStringAddCode(MacroAssembler* masm) {
+void BinaryOpStub::GenerateAddStrings(MacroAssembler* masm) {
   ASSERT(op_ == Token::ADD);
   Label left_not_string, call_runtime;
 
@@ -1358,58 +1326,17 @@ void BinaryOpStub::GenerateStringAddCode(MacroAssembler* masm) {
 }
 
 
-void BinaryOpStub::GenerateCallRuntimeCode(MacroAssembler* masm) {
-  GenerateRegisterArgsPush(masm);
-  switch (op_) {
-    case Token::ADD:
-      __ InvokeBuiltin(Builtins::ADD, JUMP_FUNCTION);
-      break;
-    case Token::SUB:
-      __ InvokeBuiltin(Builtins::SUB, JUMP_FUNCTION);
-      break;
-    case Token::MUL:
-      __ InvokeBuiltin(Builtins::MUL, JUMP_FUNCTION);
-      break;
-    case Token::DIV:
-      __ InvokeBuiltin(Builtins::DIV, JUMP_FUNCTION);
-      break;
-    case Token::MOD:
-      __ InvokeBuiltin(Builtins::MOD, JUMP_FUNCTION);
-      break;
-    case Token::BIT_OR:
-      __ InvokeBuiltin(Builtins::BIT_OR, JUMP_FUNCTION);
-      break;
-    case Token::BIT_AND:
-      __ InvokeBuiltin(Builtins::BIT_AND, JUMP_FUNCTION);
-      break;
-    case Token::BIT_XOR:
-      __ InvokeBuiltin(Builtins::BIT_XOR, JUMP_FUNCTION);
-      break;
-    case Token::SAR:
-      __ InvokeBuiltin(Builtins::SAR, JUMP_FUNCTION);
-      break;
-    case Token::SHL:
-      __ InvokeBuiltin(Builtins::SHL, JUMP_FUNCTION);
-      break;
-    case Token::SHR:
-      __ InvokeBuiltin(Builtins::SHR, JUMP_FUNCTION);
-      break;
-    default:
-      UNREACHABLE();
-  }
-}
-
-
 void BinaryOpStub::GenerateSmiStub(MacroAssembler* masm) {
   Label call_runtime;
   if (result_type_ == BinaryOpIC::UNINITIALIZED ||
       result_type_ == BinaryOpIC::SMI) {
     // Only allow smi results.
-    GenerateSmiCode(masm, NULL, NO_HEAPNUMBER_RESULTS);
+    BinaryOpStub_GenerateSmiCode(masm, NULL, NO_HEAPNUMBER_RESULTS, op_);
   } else {
     // Allow heap number result and don't make a transition if a heap number
     // cannot be allocated.
-    GenerateSmiCode(masm, &call_runtime, ALLOW_HEAPNUMBER_RESULTS);
+    BinaryOpStub_GenerateSmiCode(
+        masm, &call_runtime, ALLOW_HEAPNUMBER_RESULTS, op_);
   }
 
   // Code falls through if the result is not returned as either a smi or heap
@@ -1418,24 +1345,22 @@ void BinaryOpStub::GenerateSmiStub(MacroAssembler* masm) {
 
   if (call_runtime.is_linked()) {
     __ bind(&call_runtime);
-    GenerateCallRuntimeCode(masm);
+    GenerateRegisterArgsPush(masm);
+    GenerateCallRuntime(masm);
   }
 }
 
 
-void BinaryOpStub::GenerateStringStub(MacroAssembler* masm) {
-  ASSERT(operands_type_ == BinaryOpIC::STRING);
-  ASSERT(op_ == Token::ADD);
-  GenerateStringAddCode(masm);
-  // Try to add arguments as strings, otherwise, transition to the generic
-  // BinaryOpIC type.
-  GenerateTypeTransition(masm);
+void BinaryOpStub::GenerateInt32Stub(MacroAssembler* masm) {
+  // The int32 case is identical to the Smi case.  We avoid creating this
+  // ic state on x64.
+  UNREACHABLE();
 }
 
 
 void BinaryOpStub::GenerateBothStringStub(MacroAssembler* masm) {
   Label call_runtime;
-  ASSERT(operands_type_ == BinaryOpIC::BOTH_STRING);
+  ASSERT(left_type_ == BinaryOpIC::STRING && right_type_ == BinaryOpIC::STRING);
   ASSERT(op_ == Token::ADD);
   // If both arguments are strings, call the string add stub.
   // Otherwise, do a transition.
@@ -1469,7 +1394,7 @@ void BinaryOpStub::GenerateOddballStub(MacroAssembler* masm) {
   if (op_ == Token::ADD) {
     // Handle string addition here, because it is the only operation
     // that does not do a ToNumber conversion on the operands.
-    GenerateStringAddCode(masm);
+    GenerateAddStrings(masm);
   }
 
   // Convert oddball arguments to numbers.
@@ -1496,39 +1421,79 @@ void BinaryOpStub::GenerateOddballStub(MacroAssembler* masm) {
 }
 
 
+static void BinaryOpStub_CheckSmiInput(MacroAssembler* masm,
+                                       Register input,
+                                       Label* fail) {
+  Label ok;
+  __ JumpIfSmi(input, &ok, Label::kNear);
+  Register heap_number_map = r8;
+  Register scratch1 = r9;
+  Register scratch2 = r10;
+  // HeapNumbers containing 32bit integer values are also allowed.
+  __ LoadRoot(heap_number_map, Heap::kHeapNumberMapRootIndex);
+  __ cmpq(FieldOperand(input, HeapObject::kMapOffset), heap_number_map);
+  __ j(not_equal, fail);
+  __ movsd(xmm0, FieldOperand(input, HeapNumber::kValueOffset));
+  // Convert, convert back, and compare the two doubles' bits.
+  __ cvttsd2siq(scratch2, xmm0);
+  __ cvtlsi2sd(xmm1, scratch2);
+  __ movq(scratch1, xmm0);
+  __ movq(scratch2, xmm1);
+  __ cmpq(scratch1, scratch2);
+  __ j(not_equal, fail);
+  __ bind(&ok);
+}
+
+
 void BinaryOpStub::GenerateHeapNumberStub(MacroAssembler* masm) {
   Label gc_required, not_number;
-  GenerateFloatingPointCode(masm, &gc_required, &not_number);
+
+  // It could be that only SMIs have been seen at either the left
+  // or the right operand. For precise type feedback, patch the IC
+  // again if this changes.
+  if (left_type_ == BinaryOpIC::SMI) {
+    BinaryOpStub_CheckSmiInput(masm, rdx, &not_number);
+  }
+  if (right_type_ == BinaryOpIC::SMI) {
+    BinaryOpStub_CheckSmiInput(masm, rax, &not_number);
+  }
+
+  BinaryOpStub_GenerateFloatingPointCode(
+      masm, &gc_required, &not_number, op_, mode_);
 
   __ bind(&not_number);
   GenerateTypeTransition(masm);
 
   __ bind(&gc_required);
-  GenerateCallRuntimeCode(masm);
+  GenerateRegisterArgsPush(masm);
+  GenerateCallRuntime(masm);
 }
 
 
 void BinaryOpStub::GenerateGeneric(MacroAssembler* masm) {
   Label call_runtime, call_string_add_or_runtime;
 
-  GenerateSmiCode(masm, &call_runtime, ALLOW_HEAPNUMBER_RESULTS);
+  BinaryOpStub_GenerateSmiCode(
+      masm, &call_runtime, ALLOW_HEAPNUMBER_RESULTS, op_);
 
-  GenerateFloatingPointCode(masm, &call_runtime, &call_string_add_or_runtime);
+  BinaryOpStub_GenerateFloatingPointCode(
+      masm, &call_runtime, &call_string_add_or_runtime, op_, mode_);
 
   __ bind(&call_string_add_or_runtime);
   if (op_ == Token::ADD) {
-    GenerateStringAddCode(masm);
+    GenerateAddStrings(masm);
   }
 
   __ bind(&call_runtime);
-  GenerateCallRuntimeCode(masm);
+  GenerateRegisterArgsPush(masm);
+  GenerateCallRuntime(masm);
 }
 
 
-void BinaryOpStub::GenerateHeapResultAllocation(MacroAssembler* masm,
-                                                Label* alloc_failure) {
+static void BinaryOpStub_GenerateHeapResultAllocation(MacroAssembler* masm,
+                                                      Label* alloc_failure,
+                                                      OverwriteMode mode) {
   Label skip_allocation;
-  OverwriteMode mode = mode_;
   switch (mode) {
     case OVERWRITE_LEFT: {
       // If the argument in rdx is already an object, we skip the
@@ -2024,17 +1989,21 @@ void FloatingPointHelper::NumbersToSmis(MacroAssembler* masm,
                                         Register scratch2,
                                         Register scratch3,
                                         Label* on_success,
-                                        Label* on_not_smis)   {
+                                        Label* on_not_smis,
+                                        ConvertUndefined convert_undefined) {
   Register heap_number_map = scratch3;
   Register smi_result = scratch1;
-  Label done;
+  Label done, maybe_undefined_first, maybe_undefined_second, first_done;
 
   __ LoadRoot(heap_number_map, Heap::kHeapNumberMapRootIndex);
 
   Label first_smi;
   __ JumpIfSmi(first, &first_smi, Label::kNear);
   __ cmpq(FieldOperand(first, HeapObject::kMapOffset), heap_number_map);
-  __ j(not_equal, on_not_smis);
+  __ j(not_equal,
+       (convert_undefined == CONVERT_UNDEFINED_TO_ZERO)
+           ? &maybe_undefined_first
+           : on_not_smis);
   // Convert HeapNumber to smi if possible.
   __ movsd(xmm0, FieldOperand(first, HeapNumber::kValueOffset));
   __ movq(scratch2, xmm0);
@@ -2047,14 +2016,15 @@ void FloatingPointHelper::NumbersToSmis(MacroAssembler* masm,
   __ j(not_equal, on_not_smis);
   __ Integer32ToSmi(first, smi_result);
 
+  __ bind(&first_done);
   __ JumpIfSmi(second, (on_success != NULL) ? on_success : &done);
   __ bind(&first_smi);
-  if (FLAG_debug_code) {
-    // Second should be non-smi if we get here.
-    __ AbortIfSmi(second);
-  }
+  __ AssertNotSmi(second);
   __ cmpq(FieldOperand(second, HeapObject::kMapOffset), heap_number_map);
-  __ j(not_equal, on_not_smis);
+  __ j(not_equal,
+       (convert_undefined == CONVERT_UNDEFINED_TO_ZERO)
+           ? &maybe_undefined_second
+           : on_not_smis);
   // Convert second to smi, if possible.
   __ movsd(xmm0, FieldOperand(second, HeapNumber::kValueOffset));
   __ movq(scratch2, xmm0);
@@ -2067,8 +2037,25 @@ void FloatingPointHelper::NumbersToSmis(MacroAssembler* masm,
   if (on_success != NULL) {
     __ jmp(on_success);
   } else {
-    __ bind(&done);
+    __ jmp(&done);
+  }
+
+  __ bind(&maybe_undefined_first);
+  __ CompareRoot(first, Heap::kUndefinedValueRootIndex);
+  __ j(not_equal, on_not_smis);
+  __ xor_(first, first);
+  __ jmp(&first_done);
+
+  __ bind(&maybe_undefined_second);
+  __ CompareRoot(second, Heap::kUndefinedValueRootIndex);
+  __ j(not_equal, on_not_smis);
+  __ xor_(second, second);
+  if (on_success != NULL) {
+    __ jmp(on_success);
   }
+  // Else: fall through.
+
+  __ bind(&done);
 }
 
 
@@ -2234,7 +2221,7 @@ void MathPowStub::Generate(MacroAssembler* masm) {
     // F2XM1 calculates 2^st(0) - 1 for -1 < st(0) < 1
     __ f2xm1();    // 2^(X-rnd(X)) - 1, rnd(X)
     __ fld1();     // 1, 2^(X-rnd(X)) - 1, rnd(X)
-    __ faddp(1);   // 1, 2^(X-rnd(X)), rnd(X)
+    __ faddp(1);   // 2^(X-rnd(X)), rnd(X)
     // FSCALE calculates st(0) * 2^st(1)
     __ fscale();   // 2^X, rnd(X)
     __ fstp(1);
@@ -2262,21 +2249,28 @@ void MathPowStub::Generate(MacroAssembler* masm) {
   __ movsd(double_scratch2, double_result);  // Load double_exponent with 1.
 
   // Get absolute value of exponent.
-  Label no_neg, while_true, no_multiply;
+  Label no_neg, while_true, while_false;
   __ testl(scratch, scratch);
   __ j(positive, &no_neg, Label::kNear);
   __ negl(scratch);
   __ bind(&no_neg);
 
-  __ bind(&while_true);
+  __ j(zero, &while_false, Label::kNear);
   __ shrl(scratch, Immediate(1));
-  __ j(not_carry, &no_multiply, Label::kNear);
-  __ mulsd(double_result, double_scratch);
-  __ bind(&no_multiply);
+  // Above condition means CF==0 && ZF==0.  This means that the
+  // bit that has been shifted out is 0 and the result is not 0.
+  __ j(above, &while_true, Label::kNear);
+  __ movsd(double_result, double_scratch);
+  __ j(zero, &while_false, Label::kNear);
 
+  __ bind(&while_true);
+  __ shrl(scratch, Immediate(1));
   __ mulsd(double_scratch, double_scratch);
+  __ j(above, &while_true, Label::kNear);
+  __ mulsd(double_result, double_scratch);
   __ j(not_zero, &while_true);
 
+  __ bind(&while_false);
   // If the exponent is negative, return 1/result.
   __ testl(exponent, exponent);
   __ j(greater, &done);
@@ -2602,7 +2596,7 @@ void ArgumentsAccessStub::GenerateNewNonStrictFast(MacroAssembler* masm) {
   __ bind(&runtime);
   __ Integer32ToSmi(rcx, rcx);
   __ movq(Operand(rsp, 1 * kPointerSize), rcx);  // Patch argument count.
-  __ TailCallRuntime(Runtime::kNewStrictArgumentsFast, 3, 1);
+  __ TailCallRuntime(Runtime::kNewArgumentsFast, 3, 1);
 }
 
 
@@ -3020,8 +3014,8 @@ void RegExpExecStub::Generate(MacroAssembler* masm) {
   // r15: original subject string
   __ testb(rcx, rcx);  // Last use of rcx as encoding of subject string.
   __ j(zero, &setup_two_byte, Label::kNear);
-  __ lea(arg4, FieldOperand(rdi, r14, times_1, SeqAsciiString::kHeaderSize));
-  __ lea(arg3, FieldOperand(rdi, rbx, times_1, SeqAsciiString::kHeaderSize));
+  __ lea(arg4, FieldOperand(rdi, r14, times_1, SeqOneByteString::kHeaderSize));
+  __ lea(arg3, FieldOperand(rdi, rbx, times_1, SeqOneByteString::kHeaderSize));
   __ jmp(&setup_rest, Label::kNear);
   __ bind(&setup_two_byte);
   __ lea(arg4, FieldOperand(rdi, r14, times_2, SeqTwoByteString::kHeaderSize));
@@ -3161,7 +3155,7 @@ void RegExpExecStub::Generate(MacroAssembler* masm) {
   }
   __ movq(rdi, FieldOperand(rdi, ExternalString::kResourceDataOffset));
   // Move the pointer so that offset-wise, it looks like a sequential string.
-  STATIC_ASSERT(SeqTwoByteString::kHeaderSize == SeqAsciiString::kHeaderSize);
+  STATIC_ASSERT(SeqTwoByteString::kHeaderSize == SeqOneByteString::kHeaderSize);
   __ subq(rdi, Immediate(SeqTwoByteString::kHeaderSize - kHeapObjectTag));
   STATIC_ASSERT(kTwoByteStringTag == 0);
   __ testb(rbx, Immediate(kStringEncodingMask));
@@ -3235,14 +3229,14 @@ void RegExpConstructResultStub::Generate(MacroAssembler* masm) {
   // Set length.
   __ Integer32ToSmi(rdx, rbx);
   __ movq(FieldOperand(rcx, FixedArray::kLengthOffset), rdx);
-  // Fill contents of fixed-array with the-hole.
-  __ LoadRoot(rdx, Heap::kTheHoleValueRootIndex);
+  // Fill contents of fixed-array with undefined.
+  __ LoadRoot(rdx, Heap::kUndefinedValueRootIndex);
   __ lea(rcx, FieldOperand(rcx, FixedArray::kHeaderSize));
-  // Fill fixed array elements with hole.
+  // Fill fixed array elements with undefined.
   // rax: JSArray.
   // rbx: Number of elements in array that remains to be filled, as int32.
   // rcx: Start of elements in FixedArray.
-  // rdx: the hole.
+  // rdx: undefined.
   Label loop;
   __ testl(rbx, rbx);
   __ bind(&loop);
@@ -3376,30 +3370,59 @@ static int NegativeComparisonResult(Condition cc) {
 }
 
 
-void CompareStub::Generate(MacroAssembler* masm) {
-  ASSERT(lhs_.is(no_reg) && rhs_.is(no_reg));
+static void CheckInputType(MacroAssembler* masm,
+                           Register input,
+                           CompareIC::State expected,
+                           Label* fail) {
+  Label ok;
+  if (expected == CompareIC::SMI) {
+    __ JumpIfNotSmi(input, fail);
+  } else if (expected == CompareIC::HEAP_NUMBER) {
+    __ JumpIfSmi(input, &ok);
+    __ CompareMap(input, masm->isolate()->factory()->heap_number_map(), NULL);
+    __ j(not_equal, fail);
+  }
+  // We could be strict about symbol/string here, but as long as
+  // hydrogen doesn't care, the stub doesn't have to care either.
+  __ bind(&ok);
+}
+
+
+static void BranchIfNonSymbol(MacroAssembler* masm,
+                              Label* label,
+                              Register object,
+                              Register scratch) {
+  __ JumpIfSmi(object, label);
+  __ movq(scratch, FieldOperand(object, HeapObject::kMapOffset));
+  __ movzxbq(scratch,
+             FieldOperand(scratch, Map::kInstanceTypeOffset));
+  // Ensure that no non-strings have the symbol bit set.
+  STATIC_ASSERT(LAST_TYPE < kNotStringTag + kIsSymbolMask);
+  STATIC_ASSERT(kSymbolTag != 0);
+  __ testb(scratch, Immediate(kIsSymbolMask));
+  __ j(zero, label);
+}
+
 
+void ICCompareStub::GenerateGeneric(MacroAssembler* masm) {
   Label check_unequal_objects, done;
+  Condition cc = GetCondition();
   Factory* factory = masm->isolate()->factory();
 
-  // Compare two smis if required.
-  if (include_smi_compare_) {
-    Label non_smi, smi_done;
-    __ JumpIfNotBothSmi(rax, rdx, &non_smi);
-    __ subq(rdx, rax);
-    __ j(no_overflow, &smi_done);
-    __ not_(rdx);  // Correct sign in case of overflow. rdx cannot be 0 here.
-    __ bind(&smi_done);
-    __ movq(rax, rdx);
-    __ ret(0);
-    __ bind(&non_smi);
-  } else if (FLAG_debug_code) {
-    Label ok;
-    __ JumpIfNotSmi(rdx, &ok);
-    __ JumpIfNotSmi(rax, &ok);
-    __ Abort("CompareStub: smi operands");
-    __ bind(&ok);
-  }
+  Label miss;
+  CheckInputType(masm, rdx, left_, &miss);
+  CheckInputType(masm, rax, right_, &miss);
+
+  // Compare two smis.
+  Label non_smi, smi_done;
+  __ JumpIfNotBothSmi(rax, rdx, &non_smi);
+  __ subq(rdx, rax);
+  __ j(no_overflow, &smi_done);
+  __ not_(rdx);  // Correct sign in case of overflow. rdx cannot be 0 here.
+  __ bind(&smi_done);
+  __ movq(rax, rdx);
+  __ ret(0);
+  __ bind(&non_smi);
 
   // The compare stub returns a positive, negative, or zero 64-bit integer
   // value in rax, corresponding to result of comparing the two inputs.
@@ -3412,66 +3435,58 @@ void CompareStub::Generate(MacroAssembler* masm) {
     __ cmpq(rax, rdx);
     __ j(not_equal, &not_identical, Label::kNear);
 
-    if (cc_ != equal) {
+    if (cc != equal) {
       // Check for undefined.  undefined OP undefined is false even though
       // undefined == undefined.
       Label check_for_nan;
       __ CompareRoot(rdx, Heap::kUndefinedValueRootIndex);
       __ j(not_equal, &check_for_nan, Label::kNear);
-      __ Set(rax, NegativeComparisonResult(cc_));
+      __ Set(rax, NegativeComparisonResult(cc));
       __ ret(0);
       __ bind(&check_for_nan);
     }
 
     // Test for NaN. Sadly, we can't just compare to FACTORY->nan_value(),
     // so we do the second best thing - test it ourselves.
-    // Note: if cc_ != equal, never_nan_nan_ is not used.
-    // We cannot set rax to EQUAL until just before return because
-    // rax must be unchanged on jump to not_identical.
-    if (never_nan_nan_ && (cc_ == equal)) {
-      __ Set(rax, EQUAL);
-      __ ret(0);
-    } else {
-      Label heap_number;
-      // If it's not a heap number, then return equal for (in)equality operator.
-      __ Cmp(FieldOperand(rdx, HeapObject::kMapOffset),
-             factory->heap_number_map());
-      __ j(equal, &heap_number, Label::kNear);
-      if (cc_ != equal) {
-        // Call runtime on identical objects.  Otherwise return equal.
-        __ CmpObjectType(rax, FIRST_SPEC_OBJECT_TYPE, rcx);
-        __ j(above_equal, &not_identical, Label::kNear);
-      }
-      __ Set(rax, EQUAL);
-      __ ret(0);
+    Label heap_number;
+    // If it's not a heap number, then return equal for (in)equality operator.
+    __ Cmp(FieldOperand(rdx, HeapObject::kMapOffset),
+           factory->heap_number_map());
+    __ j(equal, &heap_number, Label::kNear);
+    if (cc != equal) {
+      // Call runtime on identical objects.  Otherwise return equal.
+      __ CmpObjectType(rax, FIRST_SPEC_OBJECT_TYPE, rcx);
+      __ j(above_equal, &not_identical, Label::kNear);
+    }
+    __ Set(rax, EQUAL);
+    __ ret(0);
 
-      __ bind(&heap_number);
-      // It is a heap number, so return  equal if it's not NaN.
-      // For NaN, return 1 for every condition except greater and
-      // greater-equal.  Return -1 for them, so the comparison yields
-      // false for all conditions except not-equal.
-      __ Set(rax, EQUAL);
-      __ movsd(xmm0, FieldOperand(rdx, HeapNumber::kValueOffset));
-      __ ucomisd(xmm0, xmm0);
-      __ setcc(parity_even, rax);
-      // rax is 0 for equal non-NaN heapnumbers, 1 for NaNs.
-      if (cc_ == greater_equal || cc_ == greater) {
-        __ neg(rax);
-      }
-      __ ret(0);
+    __ bind(&heap_number);
+    // It is a heap number, so return  equal if it's not NaN.
+    // For NaN, return 1 for every condition except greater and
+    // greater-equal.  Return -1 for them, so the comparison yields
+    // false for all conditions except not-equal.
+    __ Set(rax, EQUAL);
+    __ movsd(xmm0, FieldOperand(rdx, HeapNumber::kValueOffset));
+    __ ucomisd(xmm0, xmm0);
+    __ setcc(parity_even, rax);
+    // rax is 0 for equal non-NaN heapnumbers, 1 for NaNs.
+    if (cc == greater_equal || cc == greater) {
+      __ neg(rax);
     }
+    __ ret(0);
 
     __ bind(&not_identical);
   }
 
-  if (cc_ == equal) {  // Both strict and non-strict.
+  if (cc == equal) {  // Both strict and non-strict.
     Label slow;  // Fallthrough label.
 
     // If we're doing a strict equality comparison, we don't have to do
     // type conversion, so we generate code to do fast comparison for objects
     // and oddballs. Non-smi numbers and strings still go through the usual
     // slow-case code.
-    if (strict_) {
+    if (strict()) {
       // If either is a Smi (we know that not both are), then they can only
       // be equal if the other is a HeapNumber. If so, use the slow case.
       {
@@ -3523,40 +3538,38 @@ void CompareStub::Generate(MacroAssembler* masm) {
   }
 
   // Generate the number comparison code.
-  if (include_number_compare_) {
-    Label non_number_comparison;
-    Label unordered;
-    FloatingPointHelper::LoadSSE2UnknownOperands(masm, &non_number_comparison);
-    __ xorl(rax, rax);
-    __ xorl(rcx, rcx);
-    __ ucomisd(xmm0, xmm1);
-
-    // Don't base result on EFLAGS when a NaN is involved.
-    __ j(parity_even, &unordered, Label::kNear);
-    // Return a result of -1, 0, or 1, based on EFLAGS.
-    __ setcc(above, rax);
-    __ setcc(below, rcx);
-    __ subq(rax, rcx);
-    __ ret(0);
+  Label non_number_comparison;
+  Label unordered;
+  FloatingPointHelper::LoadSSE2UnknownOperands(masm, &non_number_comparison);
+  __ xorl(rax, rax);
+  __ xorl(rcx, rcx);
+  __ ucomisd(xmm0, xmm1);
 
-    // If one of the numbers was NaN, then the result is always false.
-    // The cc is never not-equal.
-    __ bind(&unordered);
-    ASSERT(cc_ != not_equal);
-    if (cc_ == less || cc_ == less_equal) {
-      __ Set(rax, 1);
-    } else {
-      __ Set(rax, -1);
-    }
-    __ ret(0);
+  // Don't base result on EFLAGS when a NaN is involved.
+  __ j(parity_even, &unordered, Label::kNear);
+  // Return a result of -1, 0, or 1, based on EFLAGS.
+  __ setcc(above, rax);
+  __ setcc(below, rcx);
+  __ subq(rax, rcx);
+  __ ret(0);
 
-    // The number comparison code did not provide a valid result.
-    __ bind(&non_number_comparison);
+  // If one of the numbers was NaN, then the result is always false.
+  // The cc is never not-equal.
+  __ bind(&unordered);
+  ASSERT(cc != not_equal);
+  if (cc == less || cc == less_equal) {
+    __ Set(rax, 1);
+  } else {
+    __ Set(rax, -1);
   }
+  __ ret(0);
+
+  // The number comparison code did not provide a valid result.
+  __ bind(&non_number_comparison);
 
   // Fast negative check for symbol-to-symbol equality.
   Label check_for_strings;
-  if (cc_ == equal) {
+  if (cc == equal) {
     BranchIfNonSymbol(masm, &check_for_strings, rax, kScratchRegister);
     BranchIfNonSymbol(masm, &check_for_strings, rdx, kScratchRegister);
 
@@ -3572,7 +3585,7 @@ void CompareStub::Generate(MacroAssembler* masm) {
       rdx, rax, rcx, rbx, &check_unequal_objects);
 
   // Inline comparison of ASCII strings.
-  if (cc_ == equal) {
+  if (cc == equal) {
     StringCompareStub::GenerateFlatAsciiStringEquals(masm,
                                                      rdx,
                                                      rax,
@@ -3593,7 +3606,7 @@ void CompareStub::Generate(MacroAssembler* masm) {
 #endif
 
   __ bind(&check_unequal_objects);
-  if (cc_ == equal && !strict_) {
+  if (cc == equal && !strict()) {
     // Not strict equality.  Objects are unequal if
     // they are both JSObjects and not undetectable,
     // and their pointers are different.
@@ -3633,11 +3646,11 @@ void CompareStub::Generate(MacroAssembler* masm) {
 
   // Figure out which native to call and setup the arguments.
   Builtins::JavaScript builtin;
-  if (cc_ == equal) {
-    builtin = strict_ ? Builtins::STRICT_EQUALS : Builtins::EQUALS;
+  if (cc == equal) {
+    builtin = strict() ? Builtins::STRICT_EQUALS : Builtins::EQUALS;
   } else {
     builtin = Builtins::COMPARE;
-    __ Push(Smi::FromInt(NegativeComparisonResult(cc_)));
+    __ Push(Smi::FromInt(NegativeComparisonResult(cc)));
   }
 
   // Restore return address on the stack.
@@ -3646,22 +3659,9 @@ void CompareStub::Generate(MacroAssembler* masm) {
   // Call the native; it returns -1 (less), 0 (equal), or 1 (greater)
   // tagged as a small integer.
   __ InvokeBuiltin(builtin, JUMP_FUNCTION);
-}
-
 
-void CompareStub::BranchIfNonSymbol(MacroAssembler* masm,
-                                    Label* label,
-                                    Register object,
-                                    Register scratch) {
-  __ JumpIfSmi(object, label);
-  __ movq(scratch, FieldOperand(object, HeapObject::kMapOffset));
-  __ movzxbq(scratch,
-             FieldOperand(scratch, Map::kInstanceTypeOffset));
-  // Ensure that no non-strings have the symbol bit set.
-  STATIC_ASSERT(LAST_TYPE < kNotStringTag + kIsSymbolMask);
-  STATIC_ASSERT(kSymbolTag != 0);
-  __ testb(scratch, Immediate(kIsSymbolMask));
-  __ j(zero, label);
+  __ bind(&miss);
+  GenerateMiss(masm);
 }
 
 
@@ -4419,44 +4419,6 @@ Register InstanceofStub::left() { return no_reg; }
 Register InstanceofStub::right() { return no_reg; }
 
 
-int CompareStub::MinorKey() {
-  // Encode the three parameters in a unique 16 bit value. To avoid duplicate
-  // stubs the never NaN NaN condition is only taken into account if the
-  // condition is equals.
-  ASSERT(static_cast<unsigned>(cc_) < (1 << 12));
-  ASSERT(lhs_.is(no_reg) && rhs_.is(no_reg));
-  return ConditionField::encode(static_cast<unsigned>(cc_))
-         | RegisterField::encode(false)    // lhs_ and rhs_ are not used
-         | StrictField::encode(strict_)
-         | NeverNanNanField::encode(cc_ == equal ? never_nan_nan_ : false)
-         | IncludeNumberCompareField::encode(include_number_compare_)
-         | IncludeSmiCompareField::encode(include_smi_compare_);
-}
-
-
-// Unfortunately you have to run without snapshots to see most of these
-// names in the profile since most compare stubs end up in the snapshot.
-void CompareStub::PrintName(StringStream* stream) {
-  ASSERT(lhs_.is(no_reg) && rhs_.is(no_reg));
-  const char* cc_name;
-  switch (cc_) {
-    case less: cc_name = "LT"; break;
-    case greater: cc_name = "GT"; break;
-    case less_equal: cc_name = "LE"; break;
-    case greater_equal: cc_name = "GE"; break;
-    case equal: cc_name = "EQ"; break;
-    case not_equal: cc_name = "NE"; break;
-    default: cc_name = "UnknownCondition"; break;
-  }
-  bool is_equality = cc_ == equal || cc_ == not_equal;
-  stream->Add("CompareStub_%s", cc_name);
-  if (strict_ && is_equality) stream->Add("_STRICT");
-  if (never_nan_nan_ && is_equality) stream->Add("_NO_NAN");
-  if (!include_number_compare_) stream->Add("_NO_NUMBER");
-  if (!include_smi_compare_) stream->Add("_NO_SMI");
-}
-
-
 // -------------------------------------------------------------------------
 // StringCharCodeAtGenerator
 
@@ -4694,8 +4656,8 @@ void StringAddStub::Generate(MacroAssembler* masm) {
                                                   &call_runtime);
 
   // Get the two characters forming the sub string.
-  __ movzxbq(rbx, FieldOperand(rax, SeqAsciiString::kHeaderSize));
-  __ movzxbq(rcx, FieldOperand(rdx, SeqAsciiString::kHeaderSize));
+  __ movzxbq(rbx, FieldOperand(rax, SeqOneByteString::kHeaderSize));
+  __ movzxbq(rcx, FieldOperand(rdx, SeqOneByteString::kHeaderSize));
 
   // Try to lookup two character string in symbol table. If it is not found
   // just allocate a new one.
@@ -4711,11 +4673,11 @@ void StringAddStub::Generate(MacroAssembler* masm) {
   // rbx - first byte: first character
   // rbx - second byte: *maybe* second character
   // Make sure that the second byte of rbx contains the second character.
-  __ movzxbq(rcx, FieldOperand(rdx, SeqAsciiString::kHeaderSize));
+  __ movzxbq(rcx, FieldOperand(rdx, SeqOneByteString::kHeaderSize));
   __ shll(rcx, Immediate(kBitsPerByte));
   __ orl(rbx, rcx);
   // Write both characters to the new string.
-  __ movw(FieldOperand(rax, SeqAsciiString::kHeaderSize), rbx);
+  __ movw(FieldOperand(rax, SeqOneByteString::kHeaderSize), rbx);
   __ IncrementCounter(counters->string_add_native(), 1);
   __ ret(2 * kPointerSize);
 
@@ -4738,7 +4700,7 @@ void StringAddStub::Generate(MacroAssembler* masm) {
   Label non_ascii, allocated, ascii_data;
   __ movl(rcx, r8);
   __ and_(rcx, r9);
-  STATIC_ASSERT((kStringEncodingMask & kAsciiStringTag) != 0);
+  STATIC_ASSERT((kStringEncodingMask & kOneByteStringTag) != 0);
   STATIC_ASSERT((kStringEncodingMask & kTwoByteStringTag) == 0);
   __ testl(rcx, Immediate(kStringEncodingMask));
   __ j(zero, &non_ascii);
@@ -4763,11 +4725,6 @@ void StringAddStub::Generate(MacroAssembler* masm) {
   // r9: second instance type.
   __ testb(rcx, Immediate(kAsciiDataHintMask));
   __ j(not_zero, &ascii_data);
-  __ xor_(r8, r9);
-  STATIC_ASSERT(kAsciiStringTag != 0 && kAsciiDataHintTag != 0);
-  __ andb(r8, Immediate(kAsciiStringTag | kAsciiDataHintTag));
-  __ cmpb(r8, Immediate(kAsciiStringTag | kAsciiDataHintTag));
-  __ j(equal, &ascii_data);
   // Allocate a two byte cons string.
   __ AllocateTwoByteConsString(rcx, rdi, no_reg, &call_runtime);
   __ jmp(&allocated);
@@ -4797,8 +4754,8 @@ void StringAddStub::Generate(MacroAssembler* masm) {
   __ movq(rcx, FieldOperand(rax, ExternalString::kResourceDataOffset));
   __ jmp(&first_prepared, Label::kNear);
   __ bind(&first_is_sequential);
-  STATIC_ASSERT(SeqAsciiString::kHeaderSize == SeqTwoByteString::kHeaderSize);
-  __ lea(rcx, FieldOperand(rax, SeqAsciiString::kHeaderSize));
+  STATIC_ASSERT(SeqOneByteString::kHeaderSize == SeqTwoByteString::kHeaderSize);
+  __ lea(rcx, FieldOperand(rax, SeqOneByteString::kHeaderSize));
   __ bind(&first_prepared);
 
   // Check whether both strings have same encoding.
@@ -4818,8 +4775,8 @@ void StringAddStub::Generate(MacroAssembler* masm) {
   __ movq(rdx, FieldOperand(rdx, ExternalString::kResourceDataOffset));
   __ jmp(&second_prepared, Label::kNear);
   __ bind(&second_is_sequential);
-  STATIC_ASSERT(SeqAsciiString::kHeaderSize == SeqTwoByteString::kHeaderSize);
-  __ lea(rdx, FieldOperand(rdx, SeqAsciiString::kHeaderSize));
+  STATIC_ASSERT(SeqOneByteString::kHeaderSize == SeqTwoByteString::kHeaderSize);
+  __ lea(rdx, FieldOperand(rdx, SeqOneByteString::kHeaderSize));
   __ bind(&second_prepared);
 
   Label non_ascii_string_add_flat_result;
@@ -4835,7 +4792,7 @@ void StringAddStub::Generate(MacroAssembler* masm) {
   __ AllocateAsciiString(rax, rbx, rdi, r8, r9, &call_runtime);
   // rax: result string
   // Locate first character of result.
-  __ lea(rbx, FieldOperand(rax, SeqAsciiString::kHeaderSize));
+  __ lea(rbx, FieldOperand(rax, SeqOneByteString::kHeaderSize));
   // rcx: first char of first string
   // rbx: first character of result
   // r14: length of first string
@@ -5108,7 +5065,7 @@ void StringHelper::GenerateTwoCharacterSymbolTableProbe(MacroAssembler* masm,
         temp, temp, &next_probe[i]);
 
     // Check if the two characters match.
-    __ movl(temp, FieldOperand(candidate, SeqAsciiString::kHeaderSize));
+    __ movl(temp, FieldOperand(candidate, SeqOneByteString::kHeaderSize));
     __ andl(temp, Immediate(0x0000ffff));
     __ cmpl(chars, temp);
     __ j(equal, &found_in_symbol_table);
@@ -5286,7 +5243,7 @@ void SubStringStub::Generate(MacroAssembler* masm) {
     // string's encoding is wrong because we always have to recheck encoding of
     // the newly created string's parent anyways due to externalized strings.
     Label two_byte_slice, set_slice_header;
-    STATIC_ASSERT((kStringEncodingMask & kAsciiStringTag) != 0);
+    STATIC_ASSERT((kStringEncodingMask & kOneByteStringTag) != 0);
     STATIC_ASSERT((kStringEncodingMask & kTwoByteStringTag) == 0);
     __ testb(rbx, Immediate(kStringEncodingMask));
     __ j(zero, &two_byte_slice, Label::kNear);
@@ -5326,11 +5283,11 @@ void SubStringStub::Generate(MacroAssembler* masm) {
   __ j(not_zero, &runtime);
   __ movq(rdi, FieldOperand(rdi, ExternalString::kResourceDataOffset));
   // Move the pointer so that offset-wise, it looks like a sequential string.
-  STATIC_ASSERT(SeqTwoByteString::kHeaderSize == SeqAsciiString::kHeaderSize);
+  STATIC_ASSERT(SeqTwoByteString::kHeaderSize == SeqOneByteString::kHeaderSize);
   __ subq(rdi, Immediate(SeqTwoByteString::kHeaderSize - kHeapObjectTag));
 
   __ bind(&sequential_string);
-  STATIC_ASSERT((kAsciiStringTag & kStringEncodingMask) != 0);
+  STATIC_ASSERT((kOneByteStringTag & kStringEncodingMask) != 0);
   __ testb(rbx, Immediate(kStringEncodingMask));
   __ j(zero, &two_byte_sequential);
 
@@ -5343,10 +5300,10 @@ void SubStringStub::Generate(MacroAssembler* masm) {
   {  // Locate character of sub string start.
     SmiIndex smi_as_index = masm->SmiToIndex(rdx, rdx, times_1);
     __ lea(rsi, Operand(rdi, smi_as_index.reg, smi_as_index.scale,
-                        SeqAsciiString::kHeaderSize - kHeapObjectTag));
+                        SeqOneByteString::kHeaderSize - kHeapObjectTag));
   }
   // Locate first character of result.
-  __ lea(rdi, FieldOperand(rax, SeqAsciiString::kHeaderSize));
+  __ lea(rdi, FieldOperand(rax, SeqOneByteString::kHeaderSize));
 
   // rax: result string
   // rcx: result length
@@ -5368,7 +5325,7 @@ void SubStringStub::Generate(MacroAssembler* masm) {
   {  // Locate character of sub string start.
     SmiIndex smi_as_index = masm->SmiToIndex(rdx, rdx, times_2);
     __ lea(rsi, Operand(rdi, smi_as_index.reg, smi_as_index.scale,
-                        SeqAsciiString::kHeaderSize - kHeapObjectTag));
+                        SeqOneByteString::kHeaderSize - kHeapObjectTag));
   }
   // Locate first character of result.
   __ lea(rdi, FieldOperand(rax, SeqTwoByteString::kHeaderSize));
@@ -5508,9 +5465,9 @@ void StringCompareStub::GenerateAsciiCharsCompareLoop(
   // doesn't need an additional compare.
   __ SmiToInteger32(length, length);
   __ lea(left,
-         FieldOperand(left, length, times_1, SeqAsciiString::kHeaderSize));
+         FieldOperand(left, length, times_1, SeqOneByteString::kHeaderSize));
   __ lea(right,
-         FieldOperand(right, length, times_1, SeqAsciiString::kHeaderSize));
+         FieldOperand(right, length, times_1, SeqOneByteString::kHeaderSize));
   __ neg(length);
   Register index = length;  // index = -length;
 
@@ -5566,7 +5523,7 @@ void StringCompareStub::Generate(MacroAssembler* masm) {
 
 
 void ICCompareStub::GenerateSmis(MacroAssembler* masm) {
-  ASSERT(state_ == CompareIC::SMIS);
+  ASSERT(state_ == CompareIC::SMI);
   Label miss;
   __ JumpIfNotBothSmi(rdx, rax, &miss, Label::kNear);
 
@@ -5578,7 +5535,7 @@ void ICCompareStub::GenerateSmis(MacroAssembler* masm) {
     __ subq(rdx, rax);
     __ j(no_overflow, &done, Label::kNear);
     // Correct sign of result in case of overflow.
-    __ SmiNot(rdx, rdx);
+    __ not_(rdx);
     __ bind(&done);
     __ movq(rax, rdx);
   }
@@ -5590,23 +5547,41 @@ void ICCompareStub::GenerateSmis(MacroAssembler* masm) {
 
 
 void ICCompareStub::GenerateHeapNumbers(MacroAssembler* masm) {
-  ASSERT(state_ == CompareIC::HEAP_NUMBERS);
+  ASSERT(state_ == CompareIC::HEAP_NUMBER);
 
   Label generic_stub;
   Label unordered, maybe_undefined1, maybe_undefined2;
   Label miss;
-  Condition either_smi = masm->CheckEitherSmi(rax, rdx);
-  __ j(either_smi, &generic_stub, Label::kNear);
 
-  __ CmpObjectType(rax, HEAP_NUMBER_TYPE, rcx);
+  if (left_ == CompareIC::SMI) {
+    __ JumpIfNotSmi(rdx, &miss);
+  }
+  if (right_ == CompareIC::SMI) {
+    __ JumpIfNotSmi(rax, &miss);
+  }
+
+  // Load left and right operand.
+  Label done, left, left_smi, right_smi;
+  __ JumpIfSmi(rax, &right_smi, Label::kNear);
+  __ CompareMap(rax, masm->isolate()->factory()->heap_number_map(), NULL);
   __ j(not_equal, &maybe_undefined1, Label::kNear);
-  __ CmpObjectType(rdx, HEAP_NUMBER_TYPE, rcx);
+  __ movsd(xmm1, FieldOperand(rax, HeapNumber::kValueOffset));
+  __ jmp(&left, Label::kNear);
+  __ bind(&right_smi);
+  __ SmiToInteger32(rcx, rax);  // Can't clobber rax yet.
+  __ cvtlsi2sd(xmm1, rcx);
+
+  __ bind(&left);
+  __ JumpIfSmi(rdx, &left_smi, Label::kNear);
+  __ CompareMap(rdx, masm->isolate()->factory()->heap_number_map(), NULL);
   __ j(not_equal, &maybe_undefined2, Label::kNear);
-
-  // Load left and right operand
   __ movsd(xmm0, FieldOperand(rdx, HeapNumber::kValueOffset));
-  __ movsd(xmm1, FieldOperand(rax, HeapNumber::kValueOffset));
+  __ jmp(&done);
+  __ bind(&left_smi);
+  __ SmiToInteger32(rcx, rdx);  // Can't clobber rdx yet.
+  __ cvtlsi2sd(xmm0, rcx);
 
+  __ bind(&done);
   // Compare operands
   __ ucomisd(xmm0, xmm1);
 
@@ -5622,14 +5597,16 @@ void ICCompareStub::GenerateHeapNumbers(MacroAssembler* masm) {
   __ ret(0);
 
   __ bind(&unordered);
-  CompareStub stub(GetCondition(), strict(), NO_COMPARE_FLAGS);
   __ bind(&generic_stub);
+  ICCompareStub stub(op_, CompareIC::GENERIC, CompareIC::GENERIC,
+                     CompareIC::GENERIC);
   __ jmp(stub.GetCode(), RelocInfo::CODE_TARGET);
 
   __ bind(&maybe_undefined1);
   if (Token::IsOrderedRelationalCompareOp(op_)) {
     __ Cmp(rax, masm->isolate()->factory()->undefined_value());
     __ j(not_equal, &miss);
+    __ JumpIfSmi(rdx, &unordered);
     __ CmpObjectType(rdx, HEAP_NUMBER_TYPE, rcx);
     __ j(not_equal, &maybe_undefined2, Label::kNear);
     __ jmp(&unordered);
@@ -5647,7 +5624,7 @@ void ICCompareStub::GenerateHeapNumbers(MacroAssembler* masm) {
 
 
 void ICCompareStub::GenerateSymbols(MacroAssembler* masm) {
-  ASSERT(state_ == CompareIC::SYMBOLS);
+  ASSERT(state_ == CompareIC::SYMBOL);
   ASSERT(GetCondition() == equal);
 
   // Registers containing left and right operands respectively.
@@ -5690,7 +5667,7 @@ void ICCompareStub::GenerateSymbols(MacroAssembler* masm) {
 
 
 void ICCompareStub::GenerateStrings(MacroAssembler* masm) {
-  ASSERT(state_ == CompareIC::STRINGS);
+  ASSERT(state_ == CompareIC::STRING);
   Label miss;
 
   bool equality = Token::IsEqualityOp(op_);
@@ -5776,7 +5753,7 @@ void ICCompareStub::GenerateStrings(MacroAssembler* masm) {
 
 
 void ICCompareStub::GenerateObjects(MacroAssembler* masm) {
-  ASSERT(state_ == CompareIC::OBJECTS);
+  ASSERT(state_ == CompareIC::OBJECT);
   Label miss;
   Condition either_smi = masm->CheckEitherSmi(rdx, rax);
   __ j(either_smi, &miss, Label::kNear);
@@ -5922,8 +5899,7 @@ void StringDictionaryLookupStub::GeneratePositiveLookup(MacroAssembler* masm,
   ASSERT(!name.is(r0));
   ASSERT(!name.is(r1));
 
-  // Assert that name contains a string.
-  if (FLAG_debug_code) __ AbortIfNotString(name);
+  __ AssertString(name);
 
   __ SmiToInteger32(r0, FieldOperand(elements, kCapacityOffset));
   __ decl(r0);
@@ -6137,6 +6113,11 @@ void RecordWriteStub::GenerateFixedRegStubsAheadOfTime() {
 }
 
 
+bool CodeStub::CanUseFPRegisters() {
+  return true;  // Always have SSE2 on x64.
+}
+
+
 // Takes the input in 3 registers: address_ value_ and object_.  A pointer to
 // the value has just been written into the object, now this stub makes sure
 // we keep the GC informed.  The word in the object where the value has been
@@ -6233,13 +6214,8 @@ void RecordWriteStub::InformIncrementalMarker(MacroAssembler* masm, Mode mode) {
   ASSERT(!address.is(arg1));
   __ Move(address, regs_.address());
   __ Move(arg1, regs_.object());
-  if (mode == INCREMENTAL_COMPACTION) {
-    // TODO(gc) Can we just set address arg2 in the beginning?
-    __ Move(arg2, address);
-  } else {
-    ASSERT(mode == INCREMENTAL);
-    __ movq(arg2, Operand(address, 0));
-  }
+  // TODO(gc) Can we just set address arg2 in the beginning?
+  __ Move(arg2, address);
   __ LoadAddress(arg3, ExternalReference::isolate_address());
   int argument_count = 3;
 
@@ -6269,6 +6245,17 @@ void RecordWriteStub::CheckNeedsToInformIncrementalMarker(
   Label need_incremental;
   Label need_incremental_pop_object;
 
+  __ movq(regs_.scratch0(), Immediate(~Page::kPageAlignmentMask));
+  __ and_(regs_.scratch0(), regs_.object());
+  __ movq(regs_.scratch1(),
+         Operand(regs_.scratch0(),
+                 MemoryChunk::kWriteBarrierCounterOffset));
+  __ subq(regs_.scratch1(), Immediate(1));
+  __ movq(Operand(regs_.scratch0(),
+                 MemoryChunk::kWriteBarrierCounterOffset),
+         regs_.scratch1());
+  __ j(negative, &need_incremental);
+
   // Let's look at the color of the object:  If it is not black we don't have
   // to inform the incremental marker.
   __ JumpIfBlack(regs_.object(),
diff --git a/deps/v8/src/x64/code-stubs-x64.h b/deps/v8/src/x64/code-stubs-x64.h
index 6a1a18f830..ab8ea76c8f 100644
--- a/deps/v8/src/x64/code-stubs-x64.h
+++ b/deps/v8/src/x64/code-stubs-x64.h
@@ -79,13 +79,6 @@ class StoreBufferOverflowStub: public CodeStub {
 };
 
 
-// Flag that indicates how to generate code for the stub GenericBinaryOpStub.
-enum GenericBinaryFlags {
-  NO_GENERIC_BINARY_FLAGS = 0,
-  NO_SMI_CODE_IN_STUB = 1 << 0  // Omit smi code in stub.
-};
-
-
 class UnaryOpStub: public CodeStub {
  public:
   UnaryOpStub(Token::Value op,
@@ -157,95 +150,6 @@ class UnaryOpStub: public CodeStub {
 };
 
 
-class BinaryOpStub: public CodeStub {
- public:
-  BinaryOpStub(Token::Value op, OverwriteMode mode)
-      : op_(op),
-        mode_(mode),
-        operands_type_(BinaryOpIC::UNINITIALIZED),
-        result_type_(BinaryOpIC::UNINITIALIZED) {
-    ASSERT(OpBits::is_valid(Token::NUM_TOKENS));
-  }
-
-  BinaryOpStub(
-      int key,
-      BinaryOpIC::TypeInfo operands_type,
-      BinaryOpIC::TypeInfo result_type = BinaryOpIC::UNINITIALIZED)
-      : op_(OpBits::decode(key)),
-        mode_(ModeBits::decode(key)),
-        operands_type_(operands_type),
-        result_type_(result_type) { }
-
- private:
-  enum SmiCodeGenerateHeapNumberResults {
-    ALLOW_HEAPNUMBER_RESULTS,
-    NO_HEAPNUMBER_RESULTS
-  };
-
-  Token::Value op_;
-  OverwriteMode mode_;
-
-  // Operand type information determined at runtime.
-  BinaryOpIC::TypeInfo operands_type_;
-  BinaryOpIC::TypeInfo result_type_;
-
-  virtual void PrintName(StringStream* stream);
-
-  // Minor key encoding in 15 bits RRRTTTOOOOOOOMM.
-  class ModeBits: public BitField<OverwriteMode, 0, 2> {};
-  class OpBits: public BitField<Token::Value, 2, 7> {};
-  class OperandTypeInfoBits: public BitField<BinaryOpIC::TypeInfo, 9, 3> {};
-  class ResultTypeInfoBits: public BitField<BinaryOpIC::TypeInfo, 12, 3> {};
-
-  Major MajorKey() { return BinaryOp; }
-  int MinorKey() {
-    return OpBits::encode(op_)
-           | ModeBits::encode(mode_)
-           | OperandTypeInfoBits::encode(operands_type_)
-           | ResultTypeInfoBits::encode(result_type_);
-  }
-
-  void Generate(MacroAssembler* masm);
-  void GenerateGeneric(MacroAssembler* masm);
-  void GenerateSmiCode(MacroAssembler* masm,
-                       Label* slow,
-                       SmiCodeGenerateHeapNumberResults heapnumber_results);
-  void GenerateFloatingPointCode(MacroAssembler* masm,
-                                 Label* allocation_failure,
-                                 Label* non_numeric_failure);
-  void GenerateStringAddCode(MacroAssembler* masm);
-  void GenerateCallRuntimeCode(MacroAssembler* masm);
-  void GenerateLoadArguments(MacroAssembler* masm);
-  void GenerateReturn(MacroAssembler* masm);
-  void GenerateUninitializedStub(MacroAssembler* masm);
-  void GenerateSmiStub(MacroAssembler* masm);
-  void GenerateInt32Stub(MacroAssembler* masm);
-  void GenerateHeapNumberStub(MacroAssembler* masm);
-  void GenerateOddballStub(MacroAssembler* masm);
-  void GenerateStringStub(MacroAssembler* masm);
-  void GenerateBothStringStub(MacroAssembler* masm);
-  void GenerateGenericStub(MacroAssembler* masm);
-
-  void GenerateHeapResultAllocation(MacroAssembler* masm, Label* alloc_failure);
-  void GenerateRegisterArgsPush(MacroAssembler* masm);
-  void GenerateTypeTransition(MacroAssembler* masm);
-  void GenerateTypeTransitionWithSavedArgs(MacroAssembler* masm);
-
-  virtual int GetCodeKind() { return Code::BINARY_OP_IC; }
-
-  virtual InlineCacheState GetICState() {
-    return BinaryOpIC::ToState(operands_type_);
-  }
-
-  virtual void FinishCode(Handle<Code> code) {
-    code->set_binary_op_type(operands_type_);
-    code->set_binary_op_result_type(result_type_);
-  }
-
-  friend class CodeGenerator;
-};
-
-
 class StringHelper : public AllStatic {
  public:
   // Generate code for copying characters using a simple loop. This should only
diff --git a/deps/v8/src/x64/codegen-x64.cc b/deps/v8/src/x64/codegen-x64.cc
index 2924810c1e..7954604e99 100644
--- a/deps/v8/src/x64/codegen-x64.cc
+++ b/deps/v8/src/x64/codegen-x64.cc
@@ -99,6 +99,36 @@ UnaryMathFunction CreateTranscendentalFunction(TranscendentalCache::Type type) {
 }
 
 
+UnaryMathFunction CreateExpFunction() {
+  if (!FLAG_fast_math) return &exp;
+  size_t actual_size;
+  byte* buffer = static_cast<byte*>(OS::Allocate(1 * KB, &actual_size, true));
+  if (buffer == NULL) return &exp;
+  ExternalReference::InitializeMathExpData();
+
+  MacroAssembler masm(NULL, buffer, static_cast<int>(actual_size));
+  // xmm0: raw double input.
+  XMMRegister input = xmm0;
+  XMMRegister result = xmm1;
+  __ push(rax);
+  __ push(rbx);
+
+  MathExpGenerator::EmitMathExp(&masm, input, result, xmm2, rax, rbx);
+
+  __ pop(rbx);
+  __ pop(rax);
+  __ movsd(xmm0, result);
+  __ Ret();
+
+  CodeDesc desc;
+  masm.GetCode(&desc);
+
+  CPU::FlushICache(buffer, actual_size);
+  OS::ProtectCode(buffer, actual_size);
+  return FUNCTION_CAST<UnaryMathFunction>(buffer);
+}
+
+
 UnaryMathFunction CreateSqrtFunction() {
   size_t actual_size;
   // Allocate buffer in executable space.
@@ -551,7 +581,7 @@ void StringCharLoadGenerator::Generate(MacroAssembler* masm,
   // Dispatch on the encoding: ASCII or two-byte.
   Label ascii;
   __ bind(&seq_string);
-  STATIC_ASSERT((kStringEncodingMask & kAsciiStringTag) != 0);
+  STATIC_ASSERT((kStringEncodingMask & kOneByteStringTag) != 0);
   STATIC_ASSERT((kStringEncodingMask & kTwoByteStringTag) == 0);
   __ testb(result, Immediate(kStringEncodingMask));
   __ j(not_zero, &ascii, Label::kNear);
@@ -571,12 +601,167 @@ void StringCharLoadGenerator::Generate(MacroAssembler* masm,
   __ movzxbl(result, FieldOperand(string,
                                   index,
                                   times_1,
-                                  SeqAsciiString::kHeaderSize));
+                                  SeqOneByteString::kHeaderSize));
+  __ bind(&done);
+}
+
+
+void SeqStringSetCharGenerator::Generate(MacroAssembler* masm,
+                                         String::Encoding encoding,
+                                         Register string,
+                                         Register index,
+                                         Register value) {
+  if (FLAG_debug_code) {
+    __ Check(masm->CheckSmi(index), "Non-smi index");
+    __ Check(masm->CheckSmi(value), "Non-smi value");
+
+    __ SmiCompare(index, FieldOperand(string, String::kLengthOffset));
+    __ Check(less, "Index is too large");
+
+    __ SmiCompare(index, Smi::FromInt(0));
+    __ Check(greater_equal, "Index is negative");
+
+    __ push(value);
+    __ movq(value, FieldOperand(string, HeapObject::kMapOffset));
+    __ movzxbq(value, FieldOperand(value, Map::kInstanceTypeOffset));
+
+    __ andb(value, Immediate(kStringRepresentationMask | kStringEncodingMask));
+    static const uint32_t one_byte_seq_type = kSeqStringTag | kOneByteStringTag;
+    static const uint32_t two_byte_seq_type = kSeqStringTag | kTwoByteStringTag;
+    __ cmpq(value, Immediate(encoding == String::ONE_BYTE_ENCODING
+                                 ? one_byte_seq_type : two_byte_seq_type));
+    __ Check(equal, "Unexpected string type");
+    __ pop(value);
+  }
+
+  __ SmiToInteger32(value, value);
+  __ SmiToInteger32(index, index);
+  if (encoding == String::ONE_BYTE_ENCODING) {
+    __ movb(FieldOperand(string, index, times_1, SeqString::kHeaderSize),
+            value);
+  } else {
+    __ movw(FieldOperand(string, index, times_2, SeqString::kHeaderSize),
+            value);
+  }
+}
+
+
+void MathExpGenerator::EmitMathExp(MacroAssembler* masm,
+                                   XMMRegister input,
+                                   XMMRegister result,
+                                   XMMRegister double_scratch,
+                                   Register temp1,
+                                   Register temp2) {
+  ASSERT(!input.is(result));
+  ASSERT(!input.is(double_scratch));
+  ASSERT(!result.is(double_scratch));
+  ASSERT(!temp1.is(temp2));
+  ASSERT(ExternalReference::math_exp_constants(0).address() != NULL);
+
+  Label done;
+
+  __ movq(kScratchRegister, ExternalReference::math_exp_constants(0));
+  __ movsd(double_scratch, Operand(kScratchRegister, 0 * kDoubleSize));
+  __ xorpd(result, result);
+  __ ucomisd(double_scratch, input);
+  __ j(above_equal, &done);
+  __ ucomisd(input, Operand(kScratchRegister, 1 * kDoubleSize));
+  __ movsd(result, Operand(kScratchRegister, 2 * kDoubleSize));
+  __ j(above_equal, &done);
+  __ movsd(double_scratch, Operand(kScratchRegister, 3 * kDoubleSize));
+  __ movsd(result, Operand(kScratchRegister, 4 * kDoubleSize));
+  __ mulsd(double_scratch, input);
+  __ addsd(double_scratch, result);
+  __ movq(temp2, double_scratch);
+  __ subsd(double_scratch, result);
+  __ movsd(result, Operand(kScratchRegister, 6 * kDoubleSize));
+  __ lea(temp1, Operand(temp2, 0x1ff800));
+  __ and_(temp2, Immediate(0x7ff));
+  __ shr(temp1, Immediate(11));
+  __ mulsd(double_scratch, Operand(kScratchRegister, 5 * kDoubleSize));
+  __ movq(kScratchRegister, ExternalReference::math_exp_log_table());
+  __ shl(temp1, Immediate(52));
+  __ or_(temp1, Operand(kScratchRegister, temp2, times_8, 0));
+  __ movq(kScratchRegister, ExternalReference::math_exp_constants(0));
+  __ subsd(double_scratch, input);
+  __ movsd(input, double_scratch);
+  __ subsd(result, double_scratch);
+  __ mulsd(input, double_scratch);
+  __ mulsd(result, input);
+  __ movq(input, temp1);
+  __ mulsd(result, Operand(kScratchRegister, 7 * kDoubleSize));
+  __ subsd(result, double_scratch);
+  __ addsd(result, Operand(kScratchRegister, 8 * kDoubleSize));
+  __ mulsd(result, input);
+
   __ bind(&done);
 }
 
 #undef __
 
+
+static const int kNoCodeAgeSequenceLength = 6;
+
+static byte* GetNoCodeAgeSequence(uint32_t* length) {
+  static bool initialized = false;
+  static byte sequence[kNoCodeAgeSequenceLength];
+  *length = kNoCodeAgeSequenceLength;
+  if (!initialized) {
+    // The sequence of instructions that is patched out for aging code is the
+    // following boilerplate stack-building prologue that is found both in
+    // FUNCTION and OPTIMIZED_FUNCTION code:
+    CodePatcher patcher(sequence, kNoCodeAgeSequenceLength);
+    patcher.masm()->push(rbp);
+    patcher.masm()->movq(rbp, rsp);
+    patcher.masm()->push(rsi);
+    patcher.masm()->push(rdi);
+    initialized = true;
+  }
+  return sequence;
+}
+
+
+bool Code::IsYoungSequence(byte* sequence) {
+  uint32_t young_length;
+  byte* young_sequence = GetNoCodeAgeSequence(&young_length);
+  bool result = (!memcmp(sequence, young_sequence, young_length));
+  ASSERT(result || *sequence == kCallOpcode);
+  return result;
+}
+
+
+void Code::GetCodeAgeAndParity(byte* sequence, Age* age,
+                               MarkingParity* parity) {
+  if (IsYoungSequence(sequence)) {
+    *age = kNoAge;
+    *parity = NO_MARKING_PARITY;
+  } else {
+    sequence++;  // Skip the kCallOpcode byte
+    Address target_address = sequence + *reinterpret_cast<int*>(sequence) +
+        Assembler::kCallTargetAddressOffset;
+    Code* stub = GetCodeFromTargetAddress(target_address);
+    GetCodeAgeAndParity(stub, age, parity);
+  }
+}
+
+
+void Code::PatchPlatformCodeAge(byte* sequence,
+                                Code::Age age,
+                                MarkingParity parity) {
+  uint32_t young_length;
+  byte* young_sequence = GetNoCodeAgeSequence(&young_length);
+  if (age == kNoAge) {
+    memcpy(sequence, young_sequence, young_length);
+    CPU::FlushICache(sequence, young_length);
+  } else {
+    Code* stub = GetCodeAgeStub(age, parity);
+    CodePatcher patcher(sequence, young_length);
+    patcher.masm()->call(stub->instruction_start());
+    patcher.masm()->nop();
+  }
+}
+
+
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X64
diff --git a/deps/v8/src/x64/codegen-x64.h b/deps/v8/src/x64/codegen-x64.h
index 2e80751033..d444095213 100644
--- a/deps/v8/src/x64/codegen-x64.h
+++ b/deps/v8/src/x64/codegen-x64.h
@@ -39,7 +39,6 @@ class CompilationInfo;
 
 enum TypeofState { INSIDE_TYPEOF, NOT_INSIDE_TYPEOF };
 
-
 // -------------------------------------------------------------------------
 // CodeGenerator
 
@@ -84,6 +83,20 @@ class StringCharLoadGenerator : public AllStatic {
   DISALLOW_COPY_AND_ASSIGN(StringCharLoadGenerator);
 };
 
+
+class MathExpGenerator : public AllStatic {
+ public:
+  static void EmitMathExp(MacroAssembler* masm,
+                          XMMRegister input,
+                          XMMRegister result,
+                          XMMRegister double_scratch,
+                          Register temp1,
+                          Register temp2);
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(MathExpGenerator);
+};
+
 } }  // namespace v8::internal
 
 #endif  // V8_X64_CODEGEN_X64_H_
diff --git a/deps/v8/src/x64/deoptimizer-x64.cc b/deps/v8/src/x64/deoptimizer-x64.cc
index 0502502ab0..c8fdfce26b 100644
--- a/deps/v8/src/x64/deoptimizer-x64.cc
+++ b/deps/v8/src/x64/deoptimizer-x64.cc
@@ -104,19 +104,7 @@ void Deoptimizer::DeoptimizeFunction(JSFunction* function) {
   // ignore all slots that might have been recorded on it.
   isolate->heap()->mark_compact_collector()->InvalidateCode(code);
 
-  // Iterate over all the functions which share the same code object
-  // and make them use unoptimized version.
-  Context* context = function->context()->native_context();
-  Object* element = context->get(Context::OPTIMIZED_FUNCTIONS_LIST);
-  SharedFunctionInfo* shared = function->shared();
-  while (!element->IsUndefined()) {
-    JSFunction* func = JSFunction::cast(element);
-    // Grab element before code replacement as ReplaceCode alters the list.
-    element = func->next_function_link();
-    if (func->code() == code) {
-      func->ReplaceCode(shared->code());
-    }
-  }
+  ReplaceCodeForRelatedFunctions(function, code);
 
   if (FLAG_trace_deopt) {
     PrintF("[forced deoptimization: ");
@@ -128,8 +116,6 @@ void Deoptimizer::DeoptimizeFunction(JSFunction* function) {
 
 static const byte kJnsInstruction = 0x79;
 static const byte kJnsOffset = 0x1f;
-static const byte kJaeInstruction = 0x73;
-static const byte kJaeOffset = 0x07;
 static const byte kCallInstruction = 0xe8;
 static const byte kNopByteOne = 0x66;
 static const byte kNopByteTwo = 0x90;
@@ -141,31 +127,26 @@ void Deoptimizer::PatchStackCheckCodeAt(Code* unoptimized_code,
   Address call_target_address = pc_after - kIntSize;
   ASSERT_EQ(check_code->entry(),
             Assembler::target_address_at(call_target_address));
-  // The stack check code matches the pattern:
+  // The back edge bookkeeping code matches the pattern:
   //
-  //     cmp rsp, <limit>
-  //     jae ok
+  //     add <profiling_counter>, <-delta>
+  //     jns ok
   //     call <stack guard>
   //     test rax, <loop nesting depth>
   // ok: ...
   //
   // We will patch away the branch so the code is:
   //
-  //     cmp rsp, <limit>  ;; Not changed
+  //     add <profiling_counter>, <-delta>  ;; Not changed
   //     nop
   //     nop
   //     call <on-stack replacment>
   //     test rax, <loop nesting depth>
   // ok:
   //
-  if (FLAG_count_based_interrupts) {
-    ASSERT_EQ(kJnsInstruction,       *(call_target_address - 3));
-    ASSERT_EQ(kJnsOffset,            *(call_target_address - 2));
-  } else {
-    ASSERT_EQ(kJaeInstruction,       *(call_target_address - 3));
-    ASSERT_EQ(kJaeOffset,            *(call_target_address - 2));
-  }
-  ASSERT_EQ(kCallInstruction,        *(call_target_address - 1));
+  ASSERT_EQ(kJnsInstruction,  *(call_target_address - 3));
+  ASSERT_EQ(kJnsOffset,       *(call_target_address - 2));
+  ASSERT_EQ(kCallInstruction, *(call_target_address - 1));
   *(call_target_address - 3) = kNopByteOne;
   *(call_target_address - 2) = kNopByteTwo;
   Assembler::set_target_address_at(call_target_address,
@@ -188,13 +169,8 @@ void Deoptimizer::RevertStackCheckCodeAt(Code* unoptimized_code,
   ASSERT_EQ(kNopByteOne,      *(call_target_address - 3));
   ASSERT_EQ(kNopByteTwo,      *(call_target_address - 2));
   ASSERT_EQ(kCallInstruction, *(call_target_address - 1));
-  if (FLAG_count_based_interrupts) {
-    *(call_target_address - 3) = kJnsInstruction;
-    *(call_target_address - 2) = kJnsOffset;
-  } else {
-    *(call_target_address - 3) = kJaeInstruction;
-    *(call_target_address - 2) = kJaeOffset;
-  }
+  *(call_target_address - 3) = kJnsInstruction;
+  *(call_target_address - 2) = kJnsOffset;
   Assembler::set_target_address_at(call_target_address,
                                    check_code->entry());
 
diff --git a/deps/v8/src/x64/full-codegen-x64.cc b/deps/v8/src/x64/full-codegen-x64.cc
index 78e1dec513..68773e96e2 100644
--- a/deps/v8/src/x64/full-codegen-x64.cc
+++ b/deps/v8/src/x64/full-codegen-x64.cc
@@ -119,7 +119,7 @@ void FullCodeGenerator::Generate() {
   handler_table_ =
       isolate()->factory()->NewFixedArray(function()->handler_count(), TENURED);
   profiling_counter_ = isolate()->factory()->NewJSGlobalPropertyCell(
-      Handle<Smi>(Smi::FromInt(FLAG_interrupt_budget)));
+      Handle<Smi>(Smi::FromInt(FLAG_interrupt_budget), isolate()));
   SetFunctionPosition(function());
   Comment cmnt(masm_, "[ function compiled by full code generator");
 
@@ -152,6 +152,7 @@ void FullCodeGenerator::Generate() {
   // the frame (that is done below).
   FrameScope frame_scope(masm_, StackFrame::MANUAL);
 
+  info->set_prologue_offset(masm_->pc_offset());
   __ push(rbp);  // Caller's frame pointer.
   __ movq(rbp, rsp);
   __ push(rsi);  // Callee's context.
@@ -324,34 +325,27 @@ void FullCodeGenerator::EmitProfilingCounterReset() {
 }
 
 
-void FullCodeGenerator::EmitStackCheck(IterationStatement* stmt,
-                                       Label* back_edge_target) {
-  Comment cmnt(masm_, "[ Stack check");
+void FullCodeGenerator::EmitBackEdgeBookkeeping(IterationStatement* stmt,
+                                                Label* back_edge_target) {
+  Comment cmnt(masm_, "[ Back edge bookkeeping");
   Label ok;
 
-  if (FLAG_count_based_interrupts) {
-    int weight = 1;
-    if (FLAG_weighted_back_edges) {
-      ASSERT(back_edge_target->is_bound());
-      int distance = masm_->SizeOfCodeGeneratedSince(back_edge_target);
-      weight = Min(kMaxBackEdgeWeight,
-                   Max(1, distance / kBackEdgeDistanceUnit));
-    }
-    EmitProfilingCounterDecrement(weight);
-    __ j(positive, &ok, Label::kNear);
-    InterruptStub stub;
-    __ CallStub(&stub);
-  } else {
-    __ CompareRoot(rsp, Heap::kStackLimitRootIndex);
-    __ j(above_equal, &ok, Label::kNear);
-    StackCheckStub stub;
-    __ CallStub(&stub);
+  int weight = 1;
+  if (FLAG_weighted_back_edges) {
+    ASSERT(back_edge_target->is_bound());
+    int distance = masm_->SizeOfCodeGeneratedSince(back_edge_target);
+    weight = Min(kMaxBackEdgeWeight,
+                 Max(1, distance / kBackEdgeDistanceUnit));
   }
+  EmitProfilingCounterDecrement(weight);
+  __ j(positive, &ok, Label::kNear);
+  InterruptStub stub;
+  __ CallStub(&stub);
 
   // Record a mapping of this PC offset to the OSR id.  This is used to find
   // the AST id from the unoptimized code in order to use it as a key into
   // the deoptimization input data found in the optimized code.
-  RecordStackCheck(stmt->OsrEntryId());
+  RecordBackEdge(stmt->OsrEntryId());
 
   // Loop stack checks can be patched to perform on-stack replacement. In
   // order to decide whether or not to perform OSR we embed the loop depth
@@ -360,9 +354,7 @@ void FullCodeGenerator::EmitStackCheck(IterationStatement* stmt,
   ASSERT(loop_depth() > 0);
   __ testl(rax, Immediate(Min(loop_depth(), Code::kMaxLoopNestingMarker)));
 
-  if (FLAG_count_based_interrupts) {
-    EmitProfilingCounterReset();
-  }
+  EmitProfilingCounterReset();
 
   __ bind(&ok);
   PrepareForBailoutForId(stmt->EntryId(), NO_REGISTERS);
@@ -759,8 +751,7 @@ void FullCodeGenerator::PrepareForBailoutBeforeSplit(Expression* expr,
 
 
 void FullCodeGenerator::EmitDebugCheckDeclarationContext(Variable* variable) {
-  // The variable in the declaration always resides in the current function
-  // context.
+  // The variable in the declaration always resides in the current context.
   ASSERT_EQ(0, scope()->ContextChainLength(variable->scope()));
   if (generate_debug_code_) {
     // Check that we're not inside a with or catch context.
@@ -891,33 +882,32 @@ void FullCodeGenerator::VisitFunctionDeclaration(
 
 
 void FullCodeGenerator::VisitModuleDeclaration(ModuleDeclaration* declaration) {
-  VariableProxy* proxy = declaration->proxy();
-  Variable* variable = proxy->var();
-  Handle<JSModule> instance = declaration->module()->interface()->Instance();
-  ASSERT(!instance.is_null());
+  Variable* variable = declaration->proxy()->var();
+  ASSERT(variable->location() == Variable::CONTEXT);
+  ASSERT(variable->interface()->IsFrozen());
 
-  switch (variable->location()) {
-    case Variable::UNALLOCATED: {
-      Comment cmnt(masm_, "[ ModuleDeclaration");
-      globals_->Add(variable->name(), zone());
-      globals_->Add(instance, zone());
-      Visit(declaration->module());
-      break;
-    }
+  Comment cmnt(masm_, "[ ModuleDeclaration");
+  EmitDebugCheckDeclarationContext(variable);
 
-    case Variable::CONTEXT: {
-      Comment cmnt(masm_, "[ ModuleDeclaration");
-      EmitDebugCheckDeclarationContext(variable);
-      __ Move(ContextOperand(rsi, variable->index()), instance);
-      Visit(declaration->module());
-      break;
-    }
+  // Load instance object.
+  __ LoadContext(rax, scope_->ContextChainLength(scope_->GlobalScope()));
+  __ movq(rax, ContextOperand(rax, variable->interface()->Index()));
+  __ movq(rax, ContextOperand(rax, Context::EXTENSION_INDEX));
 
-    case Variable::PARAMETER:
-    case Variable::LOCAL:
-    case Variable::LOOKUP:
-      UNREACHABLE();
-  }
+  // Assign it.
+  __ movq(ContextOperand(rsi, variable->index()), rax);
+  // We know that we have written a module, which is not a smi.
+  __ RecordWriteContextSlot(rsi,
+                            Context::SlotOffset(variable->index()),
+                            rax,
+                            rcx,
+                            kDontSaveFPRegs,
+                            EMIT_REMEMBERED_SET,
+                            OMIT_SMI_CHECK);
+  PrepareForBailoutForId(declaration->proxy()->id(), NO_REGISTERS);
+
+  // Traverse into body.
+  Visit(declaration->module());
 }
 
 
@@ -959,6 +949,14 @@ void FullCodeGenerator::DeclareGlobals(Handle<FixedArray> pairs) {
 }
 
 
+void FullCodeGenerator::DeclareModules(Handle<FixedArray> descriptions) {
+  // Call the runtime to declare the modules.
+  __ Push(descriptions);
+  __ CallRuntime(Runtime::kDeclareModules, 1);
+  // Return value is ignored.
+}
+
+
 void FullCodeGenerator::VisitSwitchStatement(SwitchStatement* stmt) {
   Comment cmnt(masm_, "[ SwitchStatement");
   Breakable nested_statement(this, stmt);
@@ -1214,7 +1212,7 @@ void FullCodeGenerator::VisitForInStatement(ForInStatement* stmt) {
   __ bind(loop_statement.continue_label());
   __ SmiAddConstant(Operand(rsp, 0 * kPointerSize), Smi::FromInt(1));
 
-  EmitStackCheck(stmt, &loop);
+  EmitBackEdgeBookkeeping(stmt, &loop);
   __ jmp(&loop);
 
   // Remove the pointers stored on the stack.
@@ -1368,9 +1366,9 @@ void FullCodeGenerator::EmitDynamicLookupFastCase(Variable* var,
   } else if (var->mode() == DYNAMIC_LOCAL) {
     Variable* local = var->local_if_not_shadowed();
     __ movq(rax, ContextSlotOperandCheckExtensions(local, slow));
-    if (local->mode() == CONST ||
-        local->mode() == CONST_HARMONY ||
-        local->mode() == LET) {
+    if (local->mode() == LET ||
+        local->mode() == CONST ||
+        local->mode() == CONST_HARMONY) {
       __ CompareRoot(rax, Heap::kTheHoleValueRootIndex);
       __ j(not_equal, done);
       if (local->mode() == CONST) {
@@ -2118,37 +2116,15 @@ void FullCodeGenerator::EmitNamedPropertyAssignment(Assignment* expr) {
   ASSERT(prop != NULL);
   ASSERT(prop->key()->AsLiteral() != NULL);
 
-  // If the assignment starts a block of assignments to the same object,
-  // change to slow case to avoid the quadratic behavior of repeatedly
-  // adding fast properties.
-  if (expr->starts_initialization_block()) {
-    __ push(result_register());
-    __ push(Operand(rsp, kPointerSize));  // Receiver is now under value.
-    __ CallRuntime(Runtime::kToSlowProperties, 1);
-    __ pop(result_register());
-  }
-
   // Record source code position before IC call.
   SetSourcePosition(expr->position());
   __ Move(rcx, prop->key()->AsLiteral()->handle());
-  if (expr->ends_initialization_block()) {
-    __ movq(rdx, Operand(rsp, 0));
-  } else {
-    __ pop(rdx);
-  }
+  __ pop(rdx);
   Handle<Code> ic = is_classic_mode()
       ? isolate()->builtins()->StoreIC_Initialize()
       : isolate()->builtins()->StoreIC_Initialize_Strict();
   CallIC(ic, RelocInfo::CODE_TARGET, expr->AssignmentFeedbackId());
 
-  // If the assignment ends an initialization block, revert to fast case.
-  if (expr->ends_initialization_block()) {
-    __ push(rax);  // Result of assignment, saved even if not needed.
-    __ push(Operand(rsp, kPointerSize));  // Receiver is under value.
-    __ CallRuntime(Runtime::kToFastProperties, 1);
-    __ pop(rax);
-    __ Drop(1);
-  }
   PrepareForBailoutForId(expr->AssignmentId(), TOS_REG);
   context()->Plug(rax);
 }
@@ -2157,23 +2133,8 @@ void FullCodeGenerator::EmitNamedPropertyAssignment(Assignment* expr) {
 void FullCodeGenerator::EmitKeyedPropertyAssignment(Assignment* expr) {
   // Assignment to a property, using a keyed store IC.
 
-  // If the assignment starts a block of assignments to the same object,
-  // change to slow case to avoid the quadratic behavior of repeatedly
-  // adding fast properties.
-  if (expr->starts_initialization_block()) {
-    __ push(result_register());
-    // Receiver is now under the key and value.
-    __ push(Operand(rsp, 2 * kPointerSize));
-    __ CallRuntime(Runtime::kToSlowProperties, 1);
-    __ pop(result_register());
-  }
-
   __ pop(rcx);
-  if (expr->ends_initialization_block()) {
-    __ movq(rdx, Operand(rsp, 0));  // Leave receiver on the stack for later.
-  } else {
-    __ pop(rdx);
-  }
+  __ pop(rdx);
   // Record source code position before IC call.
   SetSourcePosition(expr->position());
   Handle<Code> ic = is_classic_mode()
@@ -2181,15 +2142,6 @@ void FullCodeGenerator::EmitKeyedPropertyAssignment(Assignment* expr) {
       : isolate()->builtins()->KeyedStoreIC_Initialize_Strict();
   CallIC(ic, RelocInfo::CODE_TARGET, expr->AssignmentFeedbackId());
 
-  // If the assignment ends an initialization block, revert to fast case.
-  if (expr->ends_initialization_block()) {
-    __ pop(rdx);
-    __ push(rax);  // Result of assignment, saved even if not needed.
-    __ push(rdx);
-    __ CallRuntime(Runtime::kToFastProperties, 1);
-    __ pop(rax);
-  }
-
   PrepareForBailoutForId(expr->AssignmentId(), TOS_REG);
   context()->Plug(rax);
 }
@@ -2346,7 +2298,7 @@ void FullCodeGenerator::VisitCall(Call* expr) {
   VariableProxy* proxy = callee->AsVariableProxy();
   Property* property = callee->AsProperty();
 
-  if (proxy != NULL && proxy->var()->is_possibly_eval()) {
+  if (proxy != NULL && proxy->var()->is_possibly_eval(isolate())) {
     // In a call to eval, we first call %ResolvePossiblyDirectEval to
     // resolve the function we need to call and the receiver of the call.
     // Then we call the resolved function using the given arguments.
@@ -2626,7 +2578,7 @@ void FullCodeGenerator::EmitIsStringWrapperSafeForDefaultValueOf(
   context()->PrepareTest(&materialize_true, &materialize_false,
                          &if_true, &if_false, &fall_through);
 
-  if (generate_debug_code_) __ AbortIfSmi(rax);
+  __ AssertNotSmi(rax);
 
   // Check whether this map has already been checked to be safe for default
   // valueOf.
@@ -2642,22 +2594,28 @@ void FullCodeGenerator::EmitIsStringWrapperSafeForDefaultValueOf(
   __ j(equal, if_false);
 
   // Look for valueOf symbol in the descriptor array, and indicate false if
-  // found. The type is not checked, so if it is a transition it is a false
-  // negative.
+  // found. Since we omit an enumeration index check, if it is added via a
+  // transition that shares its descriptor array, this is a false positive.
+  Label entry, loop, done;
+
+  // Skip loop if no descriptors are valid.
+  __ NumberOfOwnDescriptors(rcx, rbx);
+  __ cmpq(rcx, Immediate(0));
+  __ j(equal, &done);
+
   __ LoadInstanceDescriptors(rbx, rbx);
-  __ movq(rcx, FieldOperand(rbx, FixedArray::kLengthOffset));
-  // rbx: descriptor array
-  // rcx: length of descriptor array
+  // rbx: descriptor array.
+  // rcx: valid entries in the descriptor array.
   // Calculate the end of the descriptor array.
+  __ imul(rcx, rcx, Immediate(DescriptorArray::kDescriptorSize));
   SmiIndex index = masm_->SmiToIndex(rdx, rcx, kPointerSizeLog2);
   __ lea(rcx,
          Operand(
-             rbx, index.reg, index.scale, FixedArray::kHeaderSize));
+             rbx, index.reg, index.scale, DescriptorArray::kFirstOffset));
   // Calculate location of the first key name.
   __ addq(rbx, Immediate(DescriptorArray::kFirstOffset));
   // Loop through all the keys in the descriptor array. If one of these is the
   // symbol valueOf the result is false.
-  Label entry, loop;
   __ jmp(&entry);
   __ bind(&loop);
   __ movq(rdx, FieldOperand(rbx, 0));
@@ -2668,10 +2626,11 @@ void FullCodeGenerator::EmitIsStringWrapperSafeForDefaultValueOf(
   __ cmpq(rbx, rcx);
   __ j(not_equal, &loop);
 
+  __ bind(&done);
   // Reload map as register rbx was used as temporary above.
   __ movq(rbx, FieldOperand(rax, HeapObject::kMapOffset));
 
-  // If a valueOf property is not found on the object check that it's
+  // If a valueOf property is not found on the object check that its
   // prototype is the un-modified String prototype. If not result is false.
   __ movq(rcx, FieldOperand(rbx, Map::kPrototypeOffset));
   __ testq(rcx, Immediate(kSmiTagMask));
@@ -2848,7 +2807,7 @@ void FullCodeGenerator::EmitArgumentsLength(CallRuntime* expr) {
   __ movq(rax, Operand(rbx, ArgumentsAdaptorFrameConstants::kLengthOffset));
 
   __ bind(&exit);
-  if (generate_debug_code_) __ AbortIfNotSmi(rax);
+  __ AssertSmi(rax);
   context()->Plug(rax);
 }
 
@@ -3079,6 +3038,38 @@ void FullCodeGenerator::EmitDateField(CallRuntime* expr) {
 }
 
 
+void FullCodeGenerator::EmitOneByteSeqStringSetChar(CallRuntime* expr) {
+  ZoneList<Expression*>* args = expr->arguments();
+  ASSERT_EQ(3, args->length());
+
+  VisitForStackValue(args->at(1));  // index
+  VisitForStackValue(args->at(2));  // value
+  __ pop(rcx);
+  __ pop(rbx);
+  VisitForAccumulatorValue(args->at(0));  // string
+
+  static const String::Encoding encoding = String::ONE_BYTE_ENCODING;
+  SeqStringSetCharGenerator::Generate(masm_, encoding, rax, rbx, rcx);
+  context()->Plug(rax);
+}
+
+
+void FullCodeGenerator::EmitTwoByteSeqStringSetChar(CallRuntime* expr) {
+  ZoneList<Expression*>* args = expr->arguments();
+  ASSERT_EQ(3, args->length());
+
+  VisitForStackValue(args->at(1));  // index
+  VisitForStackValue(args->at(2));  // value
+  __ pop(rcx);
+  __ pop(rbx);
+  VisitForAccumulatorValue(args->at(0));  // string
+
+  static const String::Encoding encoding = String::TWO_BYTE_ENCODING;
+  SeqStringSetCharGenerator::Generate(masm_, encoding, rax, rbx, rcx);
+  context()->Plug(rax);
+}
+
+
 void FullCodeGenerator::EmitMathPow(CallRuntime* expr) {
   // Load the arguments on the stack and call the runtime function.
   ZoneList<Expression*>* args = expr->arguments();
@@ -3498,7 +3489,7 @@ void FullCodeGenerator::EmitGetCachedArrayIndex(CallRuntime* expr) {
   ASSERT(args->length() == 1);
   VisitForAccumulatorValue(args->at(0));
 
-  __ AbortIfNotString(rax);
+  __ AssertString(rax);
 
   __ movl(rax, FieldOperand(rax, String::kHashFieldOffset));
   ASSERT(String::kHashShift >= kSmiTagSize);
@@ -3590,10 +3581,10 @@ void FullCodeGenerator::EmitFastAsciiArrayJoin(CallRuntime* expr) {
   __ movzxbl(scratch, FieldOperand(scratch, Map::kInstanceTypeOffset));
   __ andb(scratch, Immediate(
       kIsNotStringMask | kStringEncodingMask | kStringRepresentationMask));
-  __ cmpb(scratch, Immediate(kStringTag | kAsciiStringTag | kSeqStringTag));
+  __ cmpb(scratch, Immediate(kStringTag | kOneByteStringTag | kSeqStringTag));
   __ j(not_equal, &bailout);
   __ AddSmiField(string_length,
-                 FieldOperand(string, SeqAsciiString::kLengthOffset));
+                 FieldOperand(string, SeqOneByteString::kLengthOffset));
   __ j(overflow, &bailout);
   __ incl(index);
   __ cmpl(index, array_length);
@@ -3629,7 +3620,7 @@ void FullCodeGenerator::EmitFastAsciiArrayJoin(CallRuntime* expr) {
   __ movzxbl(scratch, FieldOperand(scratch, Map::kInstanceTypeOffset));
   __ andb(scratch, Immediate(
       kIsNotStringMask | kStringEncodingMask | kStringRepresentationMask));
-  __ cmpb(scratch, Immediate(kStringTag | kAsciiStringTag | kSeqStringTag));
+  __ cmpb(scratch, Immediate(kStringTag | kOneByteStringTag | kSeqStringTag));
   __ j(not_equal, &bailout);
 
   // Live registers:
@@ -3640,7 +3631,7 @@ void FullCodeGenerator::EmitFastAsciiArrayJoin(CallRuntime* expr) {
 
   // Add (separator length times (array_length - 1)) to string_length.
   __ SmiToInteger32(scratch,
-                    FieldOperand(string, SeqAsciiString::kLengthOffset));
+                    FieldOperand(string, SeqOneByteString::kLengthOffset));
   __ decl(index);
   __ imull(scratch, index);
   __ j(overflow, &bailout);
@@ -3653,10 +3644,10 @@ void FullCodeGenerator::EmitFastAsciiArrayJoin(CallRuntime* expr) {
   __ AllocateAsciiString(result_pos, string_length, scratch,
                          index, string, &bailout);
   __ movq(result_operand, result_pos);
-  __ lea(result_pos, FieldOperand(result_pos, SeqAsciiString::kHeaderSize));
+  __ lea(result_pos, FieldOperand(result_pos, SeqOneByteString::kHeaderSize));
 
   __ movq(string, separator_operand);
-  __ SmiCompare(FieldOperand(string, SeqAsciiString::kLengthOffset),
+  __ SmiCompare(FieldOperand(string, SeqOneByteString::kLengthOffset),
                 Smi::FromInt(1));
   __ j(equal, &one_char_separator);
   __ j(greater, &long_separator);
@@ -3682,7 +3673,7 @@ void FullCodeGenerator::EmitFastAsciiArrayJoin(CallRuntime* expr) {
   __ SmiToInteger32(string_length,
                     FieldOperand(string, String::kLengthOffset));
   __ lea(string,
-         FieldOperand(string, SeqAsciiString::kHeaderSize));
+         FieldOperand(string, SeqOneByteString::kHeaderSize));
   __ CopyBytes(result_pos, string, string_length);
   __ incl(index);
   __ bind(&loop_1_condition);
@@ -3700,7 +3691,7 @@ void FullCodeGenerator::EmitFastAsciiArrayJoin(CallRuntime* expr) {
   __ bind(&one_char_separator);
   // Get the separator ASCII character value.
   // Register "string" holds the separator.
-  __ movzxbl(scratch, FieldOperand(string, SeqAsciiString::kHeaderSize));
+  __ movzxbl(scratch, FieldOperand(string, SeqOneByteString::kHeaderSize));
   __ Set(index, 0);
   // Jump into the loop after the code that copies the separator, so the first
   // element is not preceded by a separator
@@ -3726,7 +3717,7 @@ void FullCodeGenerator::EmitFastAsciiArrayJoin(CallRuntime* expr) {
   __ SmiToInteger32(string_length,
                     FieldOperand(string, String::kLengthOffset));
   __ lea(string,
-         FieldOperand(string, SeqAsciiString::kHeaderSize));
+         FieldOperand(string, SeqOneByteString::kHeaderSize));
   __ CopyBytes(result_pos, string, string_length);
   __ incl(index);
   __ cmpl(index, array_length_operand);
@@ -3751,7 +3742,7 @@ void FullCodeGenerator::EmitFastAsciiArrayJoin(CallRuntime* expr) {
   __ SmiToInteger32(scratch,
                     FieldOperand(string, String::kLengthOffset));
   __ lea(string,
-         FieldOperand(string, SeqAsciiString::kHeaderSize));
+         FieldOperand(string, SeqOneByteString::kHeaderSize));
   __ movq(separator_operand, string);
 
   // Jump into the loop after the code that copies the separator, so the first
@@ -3777,7 +3768,7 @@ void FullCodeGenerator::EmitFastAsciiArrayJoin(CallRuntime* expr) {
   __ SmiToInteger32(string_length,
                     FieldOperand(string, String::kLengthOffset));
   __ lea(string,
-         FieldOperand(string, SeqAsciiString::kHeaderSize));
+         FieldOperand(string, SeqOneByteString::kHeaderSize));
   __ CopyBytes(result_pos, string, string_length);
   __ incq(index);
   __ j(not_equal, &loop_3);  // Loop while (index < 0).
@@ -4095,13 +4086,9 @@ void FullCodeGenerator::VisitCountOperation(CountOperation* expr) {
   SetSourcePosition(expr->position());
 
   // Call stub for +1/-1.
+  __ movq(rdx, rax);
+  __ Move(rax, Smi::FromInt(1));
   BinaryOpStub stub(expr->binary_op(), NO_OVERWRITE);
-  if (expr->op() == Token::INC) {
-    __ Move(rdx, Smi::FromInt(1));
-  } else {
-    __ movq(rdx, rax);
-    __ Move(rax, Smi::FromInt(1));
-  }
   CallIC(stub.GetCode(), RelocInfo::CODE_TARGET, expr->CountBinOpFeedbackId());
   patch_site.EmitPatchInfo();
   __ bind(&done);
@@ -4320,29 +4307,7 @@ void FullCodeGenerator::VisitCompareOperation(CompareOperation* expr) {
 
     default: {
       VisitForAccumulatorValue(expr->right());
-      Condition cc = no_condition;
-      switch (op) {
-        case Token::EQ_STRICT:
-        case Token::EQ:
-          cc = equal;
-          break;
-        case Token::LT:
-          cc = less;
-          break;
-        case Token::GT:
-          cc = greater;
-         break;
-        case Token::LTE:
-          cc = less_equal;
-          break;
-        case Token::GTE:
-          cc = greater_equal;
-          break;
-        case Token::IN:
-        case Token::INSTANCEOF:
-        default:
-          UNREACHABLE();
-      }
+      Condition cc = CompareIC::ComputeCondition(op);
       __ pop(rdx);
 
       bool inline_smi_code = ShouldInlineSmiCase(op);
diff --git a/deps/v8/src/x64/ic-x64.cc b/deps/v8/src/x64/ic-x64.cc
index 0fd8a40036..641e243300 100644
--- a/deps/v8/src/x64/ic-x64.cc
+++ b/deps/v8/src/x64/ic-x64.cc
@@ -623,6 +623,123 @@ void KeyedLoadIC::GenerateIndexedInterceptor(MacroAssembler* masm) {
 }
 
 
+static void KeyedStoreGenerateGenericHelper(
+    MacroAssembler* masm,
+    Label* fast_object,
+    Label* fast_double,
+    Label* slow,
+    KeyedStoreCheckMap check_map,
+    KeyedStoreIncrementLength increment_length) {
+  Label transition_smi_elements;
+  Label finish_object_store, non_double_value, transition_double_elements;
+  Label fast_double_without_map_check;
+  // Fast case: Do the store, could be either Object or double.
+  __ bind(fast_object);
+  // rax: value
+  // rbx: receiver's elements array (a FixedArray)
+  // rcx: index
+  // rdx: receiver (a JSArray)
+  // r9: map of receiver
+  if (check_map == kCheckMap) {
+    __ movq(rdi, FieldOperand(rbx, HeapObject::kMapOffset));
+    __ CompareRoot(rdi, Heap::kFixedArrayMapRootIndex);
+    __ j(not_equal, fast_double);
+  }
+  // Smi stores don't require further checks.
+  Label non_smi_value;
+  __ JumpIfNotSmi(rax, &non_smi_value);
+  if (increment_length == kIncrementLength) {
+    // Add 1 to receiver->length.
+    __ leal(rdi, Operand(rcx, 1));
+    __ Integer32ToSmiField(FieldOperand(rdx, JSArray::kLengthOffset), rdi);
+  }
+  // It's irrelevant whether array is smi-only or not when writing a smi.
+  __ movq(FieldOperand(rbx, rcx, times_pointer_size, FixedArray::kHeaderSize),
+          rax);
+  __ ret(0);
+
+  __ bind(&non_smi_value);
+  // Writing a non-smi, check whether array allows non-smi elements.
+  // r9: receiver's map
+  __ CheckFastObjectElements(r9, &transition_smi_elements);
+
+  __ bind(&finish_object_store);
+  if (increment_length == kIncrementLength) {
+    // Add 1 to receiver->length.
+    __ leal(rdi, Operand(rcx, 1));
+    __ Integer32ToSmiField(FieldOperand(rdx, JSArray::kLengthOffset), rdi);
+  }
+  __ movq(FieldOperand(rbx, rcx, times_pointer_size, FixedArray::kHeaderSize),
+          rax);
+  __ movq(rdx, rax);  // Preserve the value which is returned.
+  __ RecordWriteArray(
+      rbx, rdx, rcx, kDontSaveFPRegs, EMIT_REMEMBERED_SET, OMIT_SMI_CHECK);
+  __ ret(0);
+
+  __ bind(fast_double);
+  if (check_map == kCheckMap) {
+    // Check for fast double array case. If this fails, call through to the
+    // runtime.
+    // rdi: elements array's map
+    __ CompareRoot(rdi, Heap::kFixedDoubleArrayMapRootIndex);
+    __ j(not_equal, slow);
+  }
+  __ bind(&fast_double_without_map_check);
+  __ StoreNumberToDoubleElements(rax, rbx, rcx, xmm0,
+                                 &transition_double_elements);
+  if (increment_length == kIncrementLength) {
+    // Add 1 to receiver->length.
+    __ leal(rdi, Operand(rcx, 1));
+    __ Integer32ToSmiField(FieldOperand(rdx, JSArray::kLengthOffset), rdi);
+  }
+  __ ret(0);
+
+  __ bind(&transition_smi_elements);
+  __ movq(rbx, FieldOperand(rdx, HeapObject::kMapOffset));
+
+  // Transition the array appropriately depending on the value type.
+  __ movq(r9, FieldOperand(rax, HeapObject::kMapOffset));
+  __ CompareRoot(r9, Heap::kHeapNumberMapRootIndex);
+  __ j(not_equal, &non_double_value);
+
+  // Value is a double. Transition FAST_SMI_ELEMENTS ->
+  // FAST_DOUBLE_ELEMENTS and complete the store.
+  __ LoadTransitionedArrayMapConditional(FAST_SMI_ELEMENTS,
+                                         FAST_DOUBLE_ELEMENTS,
+                                         rbx,
+                                         rdi,
+                                         slow);
+  ElementsTransitionGenerator::GenerateSmiToDouble(masm, slow);
+  __ movq(rbx, FieldOperand(rdx, JSObject::kElementsOffset));
+  __ jmp(&fast_double_without_map_check);
+
+  __ bind(&non_double_value);
+  // Value is not a double, FAST_SMI_ELEMENTS -> FAST_ELEMENTS
+  __ LoadTransitionedArrayMapConditional(FAST_SMI_ELEMENTS,
+                                         FAST_ELEMENTS,
+                                         rbx,
+                                         rdi,
+                                         slow);
+  ElementsTransitionGenerator::GenerateMapChangeElementsTransition(masm);
+  __ movq(rbx, FieldOperand(rdx, JSObject::kElementsOffset));
+  __ jmp(&finish_object_store);
+
+  __ bind(&transition_double_elements);
+  // Elements are FAST_DOUBLE_ELEMENTS, but value is an Object that's not a
+  // HeapNumber. Make sure that the receiver is a Array with FAST_ELEMENTS and
+  // transition array from FAST_DOUBLE_ELEMENTS to FAST_ELEMENTS
+  __ movq(rbx, FieldOperand(rdx, HeapObject::kMapOffset));
+  __ LoadTransitionedArrayMapConditional(FAST_DOUBLE_ELEMENTS,
+                                         FAST_ELEMENTS,
+                                         rbx,
+                                         rdi,
+                                         slow);
+  ElementsTransitionGenerator::GenerateDoubleToObject(masm, slow);
+  __ movq(rbx, FieldOperand(rdx, JSObject::kElementsOffset));
+  __ jmp(&finish_object_store);
+}
+
+
 void KeyedStoreIC::GenerateGeneric(MacroAssembler* masm,
                                    StrictModeFlag strict_mode) {
   // ----------- S t a t e -------------
@@ -631,11 +748,9 @@ void KeyedStoreIC::GenerateGeneric(MacroAssembler* masm,
   //  -- rdx     : receiver
   //  -- rsp[0]  : return address
   // -----------------------------------
-  Label slow, slow_with_tagged_index, fast, array, extra, check_extra_double;
-  Label fast_object_with_map_check, fast_object_without_map_check;
-  Label fast_double_with_map_check, fast_double_without_map_check;
-  Label transition_smi_elements, finish_object_store, non_double_value;
-  Label transition_double_elements;
+  Label slow, slow_with_tagged_index, fast_object, fast_object_grow;
+  Label fast_double, fast_double_grow;
+  Label array, extra, check_if_double_array;
 
   // Check that the object isn't a smi.
   __ JumpIfSmi(rdx, &slow_with_tagged_index);
@@ -666,7 +781,7 @@ void KeyedStoreIC::GenerateGeneric(MacroAssembler* masm,
   // rax: value
   // rbx: FixedArray
   // rcx: index
-  __ j(above, &fast_object_with_map_check);
+  __ j(above, &fast_object);
 
   // Slow case: call runtime.
   __ bind(&slow);
@@ -690,18 +805,14 @@ void KeyedStoreIC::GenerateGeneric(MacroAssembler* masm,
   // Increment index to get new length.
   __ movq(rdi, FieldOperand(rbx, HeapObject::kMapOffset));
   __ CompareRoot(rdi, Heap::kFixedArrayMapRootIndex);
-  __ j(not_equal, &check_extra_double);
-  __ leal(rdi, Operand(rcx, 1));
-  __ Integer32ToSmiField(FieldOperand(rdx, JSArray::kLengthOffset), rdi);
-  __ jmp(&fast_object_without_map_check);
+  __ j(not_equal, &check_if_double_array);
+  __ jmp(&fast_object_grow);
 
-  __ bind(&check_extra_double);
+  __ bind(&check_if_double_array);
   // rdi: elements array's map
   __ CompareRoot(rdi, Heap::kFixedDoubleArrayMapRootIndex);
   __ j(not_equal, &slow);
-  __ leal(rdi, Operand(rcx, 1));
-  __ Integer32ToSmiField(FieldOperand(rdx, JSArray::kLengthOffset), rdi);
-  __ jmp(&fast_double_without_map_check);
+  __ jmp(&fast_double_grow);
 
   // Array case: Get the length and the elements array from the JS
   // array. Check that the array is in fast mode (and writable); if it
@@ -717,92 +828,10 @@ void KeyedStoreIC::GenerateGeneric(MacroAssembler* masm,
   __ SmiCompareInteger32(FieldOperand(rdx, JSArray::kLengthOffset), rcx);
   __ j(below_equal, &extra);
 
-  // Fast case: Do the store.
-  __ bind(&fast_object_with_map_check);
-  // rax: value
-  // rbx: receiver's elements array (a FixedArray)
-  // rcx: index
-  // rdx: receiver (a JSArray)
-  __ movq(rdi, FieldOperand(rbx, HeapObject::kMapOffset));
-  __ CompareRoot(rdi, Heap::kFixedArrayMapRootIndex);
-  __ j(not_equal, &fast_double_with_map_check);
-  __ bind(&fast_object_without_map_check);
-  // Smi stores don't require further checks.
-  Label non_smi_value;
-  __ JumpIfNotSmi(rax, &non_smi_value);
-  // It's irrelevant whether array is smi-only or not when writing a smi.
-  __ movq(FieldOperand(rbx, rcx, times_pointer_size, FixedArray::kHeaderSize),
-          rax);
-  __ ret(0);
-
-  __ bind(&non_smi_value);
-  // Writing a non-smi, check whether array allows non-smi elements.
-  // r9: receiver's map
-  __ CheckFastObjectElements(r9, &transition_smi_elements);
-  __ bind(&finish_object_store);
-  __ movq(FieldOperand(rbx, rcx, times_pointer_size, FixedArray::kHeaderSize),
-          rax);
-  __ movq(rdx, rax);  // Preserve the value which is returned.
-  __ RecordWriteArray(
-      rbx, rdx, rcx, kDontSaveFPRegs, EMIT_REMEMBERED_SET, OMIT_SMI_CHECK);
-  __ ret(0);
-
-  __ bind(&fast_double_with_map_check);
-  // Check for fast double array case. If this fails, call through to the
-  // runtime.
-  // rdi: elements array's map
-  __ CompareRoot(rdi, Heap::kFixedDoubleArrayMapRootIndex);
-  __ j(not_equal, &slow);
-  __ bind(&fast_double_without_map_check);
-  // If the value is a number, store it as a double in the FastDoubleElements
-  // array.
-  __ StoreNumberToDoubleElements(rax, rbx, rcx, xmm0,
-                                 &transition_double_elements);
-  __ ret(0);
-
-  __ bind(&transition_smi_elements);
-  __ movq(rbx, FieldOperand(rdx, HeapObject::kMapOffset));
-
-  // Transition the array appropriately depending on the value type.
-  __ movq(r9, FieldOperand(rax, HeapObject::kMapOffset));
-  __ CompareRoot(r9, Heap::kHeapNumberMapRootIndex);
-  __ j(not_equal, &non_double_value);
-
-  // Value is a double. Transition FAST_SMI_ELEMENTS ->
-  // FAST_DOUBLE_ELEMENTS and complete the store.
-  __ LoadTransitionedArrayMapConditional(FAST_SMI_ELEMENTS,
-                                         FAST_DOUBLE_ELEMENTS,
-                                         rbx,
-                                         rdi,
-                                         &slow);
-  ElementsTransitionGenerator::GenerateSmiToDouble(masm, &slow);
-  __ movq(rbx, FieldOperand(rdx, JSObject::kElementsOffset));
-  __ jmp(&fast_double_without_map_check);
-
-  __ bind(&non_double_value);
-  // Value is not a double, FAST_SMI_ELEMENTS -> FAST_ELEMENTS
-  __ LoadTransitionedArrayMapConditional(FAST_SMI_ELEMENTS,
-                                         FAST_ELEMENTS,
-                                         rbx,
-                                         rdi,
-                                         &slow);
-  ElementsTransitionGenerator::GenerateMapChangeElementsTransition(masm);
-  __ movq(rbx, FieldOperand(rdx, JSObject::kElementsOffset));
-  __ jmp(&finish_object_store);
-
-  __ bind(&transition_double_elements);
-  // Elements are FAST_DOUBLE_ELEMENTS, but value is an Object that's not a
-  // HeapNumber. Make sure that the receiver is a Array with FAST_ELEMENTS and
-  // transition array from FAST_DOUBLE_ELEMENTS to FAST_ELEMENTS
-  __ movq(rbx, FieldOperand(rdx, HeapObject::kMapOffset));
-  __ LoadTransitionedArrayMapConditional(FAST_DOUBLE_ELEMENTS,
-                                         FAST_ELEMENTS,
-                                         rbx,
-                                         rdi,
-                                         &slow);
-  ElementsTransitionGenerator::GenerateDoubleToObject(masm, &slow);
-  __ movq(rbx, FieldOperand(rdx, JSObject::kElementsOffset));
-  __ jmp(&finish_object_store);
+  KeyedStoreGenerateGenericHelper(masm, &fast_object, &fast_double,
+                                  &slow, kCheckMap, kDontIncrementLength);
+  KeyedStoreGenerateGenericHelper(masm, &fast_object_grow, &fast_double_grow,
+                                  &slow, kDontCheckMap, kIncrementLength);
 }
 
 
@@ -1700,7 +1729,7 @@ Condition CompareIC::ComputeCondition(Token::Value op) {
 }
 
 
-static bool HasInlinedSmiCode(Address address) {
+bool CompareIC::HasInlinedSmiCode(Address address) {
   // The address of the instruction following the call.
   Address test_instruction_address =
       address + Assembler::kCallTargetAddressOffset;
@@ -1711,39 +1740,6 @@ static bool HasInlinedSmiCode(Address address) {
 }
 
 
-void CompareIC::UpdateCaches(Handle<Object> x, Handle<Object> y) {
-  HandleScope scope;
-  Handle<Code> rewritten;
-  State previous_state = GetState();
-
-  State state = TargetState(previous_state, HasInlinedSmiCode(address()), x, y);
-  if (state == GENERIC) {
-    CompareStub stub(GetCondition(), strict(), NO_COMPARE_FLAGS);
-    rewritten = stub.GetCode();
-  } else {
-    ICCompareStub stub(op_, state);
-    if (state == KNOWN_OBJECTS) {
-      stub.set_known_map(Handle<Map>(Handle<JSObject>::cast(x)->map()));
-    }
-    rewritten = stub.GetCode();
-  }
-  set_target(*rewritten);
-
-#ifdef DEBUG
-  if (FLAG_trace_ic) {
-    PrintF("[CompareIC (%s->%s)#%s]\n",
-           GetStateName(previous_state),
-           GetStateName(state),
-           Token::Name(op_));
-  }
-#endif
-
-  // Activate inlined smi code.
-  if (previous_state == UNINITIALIZED) {
-    PatchInlinedSmiCode(address(), ENABLE_INLINED_SMI_CHECK);
-  }
-}
-
 void PatchInlinedSmiCode(Address address, InlinedSmiCheck check) {
   // The address of the instruction following the call.
   Address test_instruction_address =
diff --git a/deps/v8/src/x64/lithium-codegen-x64.cc b/deps/v8/src/x64/lithium-codegen-x64.cc
index a07564ed24..c69b27c445 100644
--- a/deps/v8/src/x64/lithium-codegen-x64.cc
+++ b/deps/v8/src/x64/lithium-codegen-x64.cc
@@ -143,6 +143,7 @@ bool LCodeGen::GeneratePrologue() {
     __ bind(&ok);
   }
 
+  info()->set_prologue_offset(masm_->pc_offset());
   __ push(rbp);  // Caller's frame pointer.
   __ movq(rbp, rsp);
   __ push(rsi);  // Callee's context.
@@ -232,7 +233,30 @@ bool LCodeGen::GenerateBody() {
     }
 
     if (emit_instructions) {
-      Comment(";;; @%d: %s.", current_instruction_, instr->Mnemonic());
+      if (FLAG_code_comments) {
+        HValue* hydrogen = instr->hydrogen_value();
+        if (hydrogen != NULL) {
+          if (hydrogen->IsChange()) {
+            HValue* changed_value = HChange::cast(hydrogen)->value();
+            int use_id = 0;
+            const char* use_mnemo = "dead";
+            if (hydrogen->UseCount() >= 1) {
+              HValue* use_value = hydrogen->uses().value();
+              use_id = use_value->id();
+              use_mnemo = use_value->Mnemonic();
+            }
+            Comment(";;; @%d: %s. <of #%d %s for #%d %s>",
+                    current_instruction_, instr->Mnemonic(),
+                    changed_value->id(), changed_value->Mnemonic(),
+                    use_id, use_mnemo);
+          } else {
+            Comment(";;; @%d: %s. <#%d>", current_instruction_,
+                    instr->Mnemonic(), hydrogen->id());
+          }
+        } else {
+          Comment(";;; @%d: %s.", current_instruction_, instr->Mnemonic());
+        }
+      }
       instr->CompileToNative(this);
     }
   }
@@ -351,7 +375,9 @@ Operand LCodeGen::ToOperand(LOperand* op) const {
 
 
 void LCodeGen::WriteTranslation(LEnvironment* environment,
-                                Translation* translation) {
+                                Translation* translation,
+                                int* arguments_index,
+                                int* arguments_count) {
   if (environment == NULL) return;
 
   // The translation includes one command per value in the environment.
@@ -359,7 +385,17 @@ void LCodeGen::WriteTranslation(LEnvironment* environment,
   // The output frame height does not include the parameters.
   int height = translation_size - environment->parameter_count();
 
-  WriteTranslation(environment->outer(), translation);
+  // Function parameters are arguments to the outermost environment. The
+  // arguments index points to the first element of a sequence of tagged
+  // values on the stack that represent the arguments. This needs to be
+  // kept in sync with the LArgumentsElements implementation.
+  *arguments_index = -environment->parameter_count();
+  *arguments_count = environment->parameter_count();
+
+  WriteTranslation(environment->outer(),
+                   translation,
+                   arguments_index,
+                   arguments_count);
   int closure_id = *info()->closure() != *environment->closure()
       ? DefineDeoptimizationLiteral(environment->closure())
       : Translation::kSelfLiteralId;
@@ -385,6 +421,17 @@ void LCodeGen::WriteTranslation(LEnvironment* environment,
       translation->BeginArgumentsAdaptorFrame(closure_id, translation_size);
       break;
   }
+
+  // Inlined frames which push their arguments cause the index to be
+  // bumped and a new stack area to be used for materialization.
+  if (environment->entry() != NULL &&
+      environment->entry()->arguments_pushed()) {
+    *arguments_index = *arguments_index < 0
+        ? GetStackSlotCount()
+        : *arguments_index + *arguments_count;
+    *arguments_count = environment->entry()->arguments_count() + 1;
+  }
+
   for (int i = 0; i < translation_size; ++i) {
     LOperand* value = environment->values()->at(i);
     // spilled_registers_ and spilled_double_registers_ are either
@@ -396,7 +443,9 @@ void LCodeGen::WriteTranslation(LEnvironment* environment,
         AddToTranslation(translation,
                          environment->spilled_registers()[value->index()],
                          environment->HasTaggedValueAt(i),
-                         environment->HasUint32ValueAt(i));
+                         environment->HasUint32ValueAt(i),
+                         *arguments_index,
+                         *arguments_count);
       } else if (
           value->IsDoubleRegister() &&
           environment->spilled_double_registers()[value->index()] != NULL) {
@@ -405,14 +454,18 @@ void LCodeGen::WriteTranslation(LEnvironment* environment,
             translation,
             environment->spilled_double_registers()[value->index()],
             false,
-            false);
+            false,
+            *arguments_index,
+            *arguments_count);
       }
     }
 
     AddToTranslation(translation,
                      value,
                      environment->HasTaggedValueAt(i),
-                     environment->HasUint32ValueAt(i));
+                     environment->HasUint32ValueAt(i),
+                     *arguments_index,
+                     *arguments_count);
   }
 }
 
@@ -420,12 +473,14 @@ void LCodeGen::WriteTranslation(LEnvironment* environment,
 void LCodeGen::AddToTranslation(Translation* translation,
                                 LOperand* op,
                                 bool is_tagged,
-                                bool is_uint32) {
+                                bool is_uint32,
+                                int arguments_index,
+                                int arguments_count) {
   if (op == NULL) {
     // TODO(twuerthinger): Introduce marker operands to indicate that this value
     // is not present and must be reconstructed from the deoptimizer. Currently
     // this is only used for the arguments object.
-    translation->StoreArgumentsObject();
+    translation->StoreArgumentsObject(arguments_index, arguments_count);
   } else if (op->IsStackSlot()) {
     if (is_tagged) {
       translation->StoreStackSlot(op->index());
@@ -531,15 +586,16 @@ void LCodeGen::RegisterEnvironmentForDeoptimization(LEnvironment* environment,
 
     int frame_count = 0;
     int jsframe_count = 0;
+    int args_index = 0;
+    int args_count = 0;
     for (LEnvironment* e = environment; e != NULL; e = e->outer()) {
       ++frame_count;
       if (e->frame_type() == JS_FUNCTION) {
         ++jsframe_count;
       }
     }
-    Translation translation(&translations_, frame_count, jsframe_count,
-                            environment->zone());
-    WriteTranslation(environment, &translation);
+    Translation translation(&translations_, frame_count, jsframe_count, zone());
+    WriteTranslation(environment, &translation, &args_index, &args_count);
     int deoptimization_index = deoptimizations_.length();
     int pc_offset = masm()->pc_offset();
     environment->Register(deoptimization_index,
@@ -786,7 +842,7 @@ void LCodeGen::DoUnknownOSRValue(LUnknownOSRValue* instr) {
 
 void LCodeGen::DoModI(LModI* instr) {
   if (instr->hydrogen()->HasPowerOf2Divisor()) {
-    Register dividend = ToRegister(instr->InputAt(0));
+    Register dividend = ToRegister(instr->left());
 
     int32_t divisor =
         HConstant::cast(instr->hydrogen()->right())->Integer32Value();
@@ -810,8 +866,8 @@ void LCodeGen::DoModI(LModI* instr) {
     __ bind(&done);
   } else {
     Label done, remainder_eq_dividend, slow, do_subtraction, both_positive;
-    Register left_reg = ToRegister(instr->InputAt(0));
-    Register right_reg = ToRegister(instr->InputAt(1));
+    Register left_reg = ToRegister(instr->left());
+    Register right_reg = ToRegister(instr->right());
     Register result_reg = ToRegister(instr->result());
 
     ASSERT(left_reg.is(rax));
@@ -841,7 +897,7 @@ void LCodeGen::DoModI(LModI* instr) {
     __ j(less, &remainder_eq_dividend, Label::kNear);
 
     // Check if the divisor is a PowerOfTwo integer.
-    Register scratch = ToRegister(instr->TempAt(0));
+    Register scratch = ToRegister(instr->temp());
     __ movl(scratch, right_reg);
     __ subl(scratch, Immediate(1));
     __ testl(scratch, right_reg);
@@ -898,10 +954,10 @@ void LCodeGen::DoModI(LModI* instr) {
 
 
 void LCodeGen::DoMathFloorOfDiv(LMathFloorOfDiv* instr) {
-  ASSERT(instr->InputAt(1)->IsConstantOperand());
+  ASSERT(instr->right()->IsConstantOperand());
 
-  const Register dividend = ToRegister(instr->InputAt(0));
-  int32_t divisor = ToInteger32(LConstantOperand::cast(instr->InputAt(1)));
+  const Register dividend = ToRegister(instr->left());
+  int32_t divisor = ToInteger32(LConstantOperand::cast(instr->right()));
   const Register result = ToRegister(instr->result());
 
   switch (divisor) {
@@ -946,7 +1002,7 @@ void LCodeGen::DoMathFloorOfDiv(LMathFloorOfDiv* instr) {
       __ sarl(result, Immediate(power));
     }
   } else {
-    Register reg1 = ToRegister(instr->TempAt(0));
+    Register reg1 = ToRegister(instr->temp());
     Register reg2 = ToRegister(instr->result());
 
     // Find b which: 2^b < divisor_abs < 2^(b+1).
@@ -981,11 +1037,48 @@ void LCodeGen::DoMathFloorOfDiv(LMathFloorOfDiv* instr) {
 
 
 void LCodeGen::DoDivI(LDivI* instr) {
-  LOperand* right = instr->InputAt(1);
+  if (instr->hydrogen()->HasPowerOf2Divisor()) {
+    Register dividend = ToRegister(instr->left());
+    int32_t divisor =
+        HConstant::cast(instr->hydrogen()->right())->Integer32Value();
+    int32_t test_value = 0;
+    int32_t power = 0;
+
+    if (divisor > 0) {
+      test_value = divisor - 1;
+      power = WhichPowerOf2(divisor);
+    } else {
+      // Check for (0 / -x) that will produce negative zero.
+      if (instr->hydrogen()->CheckFlag(HValue::kBailoutOnMinusZero)) {
+        __ testl(dividend, dividend);
+        DeoptimizeIf(zero, instr->environment());
+      }
+      // Check for (kMinInt / -1).
+      if (divisor == -1 && instr->hydrogen()->CheckFlag(HValue::kCanOverflow)) {
+        __ cmpl(dividend, Immediate(kMinInt));
+        DeoptimizeIf(zero, instr->environment());
+      }
+      test_value = - divisor - 1;
+      power = WhichPowerOf2(-divisor);
+    }
+
+    if (test_value != 0) {
+      // Deoptimize if remainder is not 0.
+      __ testl(dividend, Immediate(test_value));
+      DeoptimizeIf(not_zero, instr->environment());
+      __ sarl(dividend, Immediate(power));
+    }
+
+    if (divisor < 0) __ negl(dividend);
+
+    return;
+  }
+
+  LOperand* right = instr->right();
   ASSERT(ToRegister(instr->result()).is(rax));
-  ASSERT(ToRegister(instr->InputAt(0)).is(rax));
-  ASSERT(!ToRegister(instr->InputAt(1)).is(rax));
-  ASSERT(!ToRegister(instr->InputAt(1)).is(rdx));
+  ASSERT(ToRegister(instr->left()).is(rax));
+  ASSERT(!ToRegister(instr->right()).is(rax));
+  ASSERT(!ToRegister(instr->right()).is(rdx));
 
   Register left_reg = rax;
 
@@ -1006,7 +1099,7 @@ void LCodeGen::DoDivI(LDivI* instr) {
     __ bind(&left_not_zero);
   }
 
-  // Check for (-kMinInt / -1).
+  // Check for (kMinInt / -1).
   if (instr->hydrogen()->CheckFlag(HValue::kCanOverflow)) {
     Label left_not_min_int;
     __ cmpl(left_reg, Immediate(kMinInt));
@@ -1027,8 +1120,8 @@ void LCodeGen::DoDivI(LDivI* instr) {
 
 
 void LCodeGen::DoMulI(LMulI* instr) {
-  Register left = ToRegister(instr->InputAt(0));
-  LOperand* right = instr->InputAt(1);
+  Register left = ToRegister(instr->left());
+  LOperand* right = instr->right();
 
   if (instr->hydrogen()->CheckFlag(HValue::kBailoutOnMinusZero)) {
     __ movl(kScratchRegister, left);
@@ -1093,8 +1186,11 @@ void LCodeGen::DoMulI(LMulI* instr) {
     __ testl(left, left);
     __ j(not_zero, &done, Label::kNear);
     if (right->IsConstantOperand()) {
-      if (ToInteger32(LConstantOperand::cast(right)) <= 0) {
+      if (ToInteger32(LConstantOperand::cast(right)) < 0) {
         DeoptimizeIf(no_condition, instr->environment());
+      } else if (ToInteger32(LConstantOperand::cast(right)) == 0) {
+        __ cmpl(kScratchRegister, Immediate(0));
+        DeoptimizeIf(less, instr->environment());
       }
     } else if (right->IsStackSlot()) {
       __ orl(kScratchRegister, ToOperand(right));
@@ -1110,8 +1206,8 @@ void LCodeGen::DoMulI(LMulI* instr) {
 
 
 void LCodeGen::DoBitI(LBitI* instr) {
-  LOperand* left = instr->InputAt(0);
-  LOperand* right = instr->InputAt(1);
+  LOperand* left = instr->left();
+  LOperand* right = instr->right();
   ASSERT(left->Equals(instr->result()));
   ASSERT(left->IsRegister());
 
@@ -1167,14 +1263,17 @@ void LCodeGen::DoBitI(LBitI* instr) {
 
 
 void LCodeGen::DoShiftI(LShiftI* instr) {
-  LOperand* left = instr->InputAt(0);
-  LOperand* right = instr->InputAt(1);
+  LOperand* left = instr->left();
+  LOperand* right = instr->right();
   ASSERT(left->Equals(instr->result()));
   ASSERT(left->IsRegister());
   if (right->IsRegister()) {
     ASSERT(ToRegister(right).is(rcx));
 
     switch (instr->op()) {
+      case Token::ROR:
+        __ rorl_cl(ToRegister(left));
+        break;
       case Token::SAR:
         __ sarl_cl(ToRegister(left));
         break;
@@ -1196,6 +1295,11 @@ void LCodeGen::DoShiftI(LShiftI* instr) {
     int value = ToInteger32(LConstantOperand::cast(right));
     uint8_t shift_count = static_cast<uint8_t>(value & 0x1F);
     switch (instr->op()) {
+      case Token::ROR:
+        if (shift_count != 0) {
+          __ rorl(ToRegister(left), Immediate(shift_count));
+        }
+        break;
       case Token::SAR:
         if (shift_count != 0) {
           __ sarl(ToRegister(left), Immediate(shift_count));
@@ -1223,8 +1327,8 @@ void LCodeGen::DoShiftI(LShiftI* instr) {
 
 
 void LCodeGen::DoSubI(LSubI* instr) {
-  LOperand* left = instr->InputAt(0);
-  LOperand* right = instr->InputAt(1);
+  LOperand* left = instr->left();
+  LOperand* right = instr->right();
   ASSERT(left->Equals(instr->result()));
 
   if (right->IsConstantOperand()) {
@@ -1258,7 +1362,7 @@ void LCodeGen::DoConstantD(LConstantD* instr) {
   if (int_val == 0) {
     __ xorps(res, res);
   } else {
-    Register tmp = ToRegister(instr->TempAt(0));
+    Register tmp = ToRegister(instr->temp());
     __ Set(tmp, int_val);
     __ movq(res, tmp);
   }
@@ -1278,28 +1382,28 @@ void LCodeGen::DoConstantT(LConstantT* instr) {
 
 void LCodeGen::DoJSArrayLength(LJSArrayLength* instr) {
   Register result = ToRegister(instr->result());
-  Register array = ToRegister(instr->InputAt(0));
+  Register array = ToRegister(instr->value());
   __ movq(result, FieldOperand(array, JSArray::kLengthOffset));
 }
 
 
 void LCodeGen::DoFixedArrayBaseLength(LFixedArrayBaseLength* instr) {
   Register result = ToRegister(instr->result());
-  Register array = ToRegister(instr->InputAt(0));
+  Register array = ToRegister(instr->value());
   __ movq(result, FieldOperand(array, FixedArrayBase::kLengthOffset));
 }
 
 
 void LCodeGen::DoMapEnumLength(LMapEnumLength* instr) {
   Register result = ToRegister(instr->result());
-  Register map = ToRegister(instr->InputAt(0));
+  Register map = ToRegister(instr->value());
   __ EnumLength(result, map);
 }
 
 
 void LCodeGen::DoElementsKind(LElementsKind* instr) {
   Register result = ToRegister(instr->result());
-  Register input = ToRegister(instr->InputAt(0));
+  Register input = ToRegister(instr->value());
 
   // Load map into |result|.
   __ movq(result, FieldOperand(input, HeapObject::kMapOffset));
@@ -1312,7 +1416,7 @@ void LCodeGen::DoElementsKind(LElementsKind* instr) {
 
 
 void LCodeGen::DoValueOf(LValueOf* instr) {
-  Register input = ToRegister(instr->InputAt(0));
+  Register input = ToRegister(instr->value());
   Register result = ToRegister(instr->result());
   ASSERT(input.is(result));
   Label done;
@@ -1329,7 +1433,7 @@ void LCodeGen::DoValueOf(LValueOf* instr) {
 
 
 void LCodeGen::DoDateField(LDateField* instr) {
-  Register object = ToRegister(instr->InputAt(0));
+  Register object = ToRegister(instr->date());
   Register result = ToRegister(instr->result());
   Smi* index = instr->index();
   Label runtime, done, not_date_object;
@@ -1370,15 +1474,24 @@ void LCodeGen::DoDateField(LDateField* instr) {
 }
 
 
+void LCodeGen::DoSeqStringSetChar(LSeqStringSetChar* instr) {
+  SeqStringSetCharGenerator::Generate(masm(),
+                                      instr->encoding(),
+                                      ToRegister(instr->string()),
+                                      ToRegister(instr->index()),
+                                      ToRegister(instr->value()));
+}
+
+
 void LCodeGen::DoBitNotI(LBitNotI* instr) {
-  LOperand* input = instr->InputAt(0);
+  LOperand* input = instr->value();
   ASSERT(input->Equals(instr->result()));
   __ not_(ToRegister(input));
 }
 
 
 void LCodeGen::DoThrow(LThrow* instr) {
-  __ push(ToRegister(instr->InputAt(0)));
+  __ push(ToRegister(instr->value()));
   CallRuntime(Runtime::kThrow, 1, instr);
 
   if (FLAG_debug_code) {
@@ -1389,8 +1502,8 @@ void LCodeGen::DoThrow(LThrow* instr) {
 
 
 void LCodeGen::DoAddI(LAddI* instr) {
-  LOperand* left = instr->InputAt(0);
-  LOperand* right = instr->InputAt(1);
+  LOperand* left = instr->left();
+  LOperand* right = instr->right();
   ASSERT(left->Equals(instr->result()));
 
   if (right->IsConstantOperand()) {
@@ -1409,8 +1522,8 @@ void LCodeGen::DoAddI(LAddI* instr) {
 
 
 void LCodeGen::DoMathMinMax(LMathMinMax* instr) {
-  LOperand* left = instr->InputAt(0);
-  LOperand* right = instr->InputAt(1);
+  LOperand* left = instr->left();
+  LOperand* right = instr->right();
   ASSERT(left->Equals(instr->result()));
   HMathMinMax::Operation operation = instr->hydrogen()->operation();
   if (instr->hydrogen()->representation().IsInteger32()) {
@@ -1475,8 +1588,8 @@ void LCodeGen::DoMathMinMax(LMathMinMax* instr) {
 
 
 void LCodeGen::DoArithmeticD(LArithmeticD* instr) {
-  XMMRegister left = ToDoubleRegister(instr->InputAt(0));
-  XMMRegister right = ToDoubleRegister(instr->InputAt(1));
+  XMMRegister left = ToDoubleRegister(instr->left());
+  XMMRegister right = ToDoubleRegister(instr->right());
   XMMRegister result = ToDoubleRegister(instr->result());
   // All operations except MOD are computed in-place.
   ASSERT(instr->op() == Token::MOD || left.is(result));
@@ -1510,8 +1623,8 @@ void LCodeGen::DoArithmeticD(LArithmeticD* instr) {
 
 
 void LCodeGen::DoArithmeticT(LArithmeticT* instr) {
-  ASSERT(ToRegister(instr->InputAt(0)).is(rdx));
-  ASSERT(ToRegister(instr->InputAt(1)).is(rax));
+  ASSERT(ToRegister(instr->left()).is(rdx));
+  ASSERT(ToRegister(instr->right()).is(rax));
   ASSERT(ToRegister(instr->result()).is(rax));
 
   BinaryOpStub stub(instr->op(), NO_OVERWRITE);
@@ -1555,17 +1668,17 @@ void LCodeGen::DoBranch(LBranch* instr) {
 
   Representation r = instr->hydrogen()->value()->representation();
   if (r.IsInteger32()) {
-    Register reg = ToRegister(instr->InputAt(0));
+    Register reg = ToRegister(instr->value());
     __ testl(reg, reg);
     EmitBranch(true_block, false_block, not_zero);
   } else if (r.IsDouble()) {
-    XMMRegister reg = ToDoubleRegister(instr->InputAt(0));
+    XMMRegister reg = ToDoubleRegister(instr->value());
     __ xorps(xmm0, xmm0);
     __ ucomisd(reg, xmm0);
     EmitBranch(true_block, false_block, not_equal);
   } else {
     ASSERT(r.IsTagged());
-    Register reg = ToRegister(instr->InputAt(0));
+    Register reg = ToRegister(instr->value());
     HType type = instr->hydrogen()->value()->type();
     if (type.IsBoolean()) {
       __ CompareRoot(reg, Heap::kTrueValueRootIndex);
@@ -1702,8 +1815,8 @@ inline Condition LCodeGen::TokenToCondition(Token::Value op, bool is_unsigned) {
 
 
 void LCodeGen::DoCmpIDAndBranch(LCmpIDAndBranch* instr) {
-  LOperand* left = instr->InputAt(0);
-  LOperand* right = instr->InputAt(1);
+  LOperand* left = instr->left();
+  LOperand* right = instr->right();
   int false_block = chunk_->LookupDestination(instr->false_block_id());
   int true_block = chunk_->LookupDestination(instr->true_block_id());
   Condition cc = TokenToCondition(instr->op(), instr->is_double());
@@ -1750,8 +1863,8 @@ void LCodeGen::DoCmpIDAndBranch(LCmpIDAndBranch* instr) {
 
 
 void LCodeGen::DoCmpObjectEqAndBranch(LCmpObjectEqAndBranch* instr) {
-  Register left = ToRegister(instr->InputAt(0));
-  Register right = ToRegister(instr->InputAt(1));
+  Register left = ToRegister(instr->left());
+  Register right = ToRegister(instr->right());
   int false_block = chunk_->LookupDestination(instr->false_block_id());
   int true_block = chunk_->LookupDestination(instr->true_block_id());
 
@@ -1761,7 +1874,7 @@ void LCodeGen::DoCmpObjectEqAndBranch(LCmpObjectEqAndBranch* instr) {
 
 
 void LCodeGen::DoCmpConstantEqAndBranch(LCmpConstantEqAndBranch* instr) {
-  Register left = ToRegister(instr->InputAt(0));
+  Register left = ToRegister(instr->left());
   int true_block = chunk_->LookupDestination(instr->true_block_id());
   int false_block = chunk_->LookupDestination(instr->false_block_id());
 
@@ -1771,7 +1884,7 @@ void LCodeGen::DoCmpConstantEqAndBranch(LCmpConstantEqAndBranch* instr) {
 
 
 void LCodeGen::DoIsNilAndBranch(LIsNilAndBranch* instr) {
-  Register reg = ToRegister(instr->InputAt(0));
+  Register reg = ToRegister(instr->value());
   int false_block = chunk_->LookupDestination(instr->false_block_id());
 
   // If the expression is known to be untagged or a smi, then it's definitely
@@ -1801,7 +1914,7 @@ void LCodeGen::DoIsNilAndBranch(LIsNilAndBranch* instr) {
     __ JumpIfSmi(reg, false_label);
     // Check for undetectable objects by looking in the bit field in
     // the map. The object has already been smi checked.
-    Register scratch = ToRegister(instr->TempAt(0));
+    Register scratch = ToRegister(instr->temp());
     __ movq(scratch, FieldOperand(reg, HeapObject::kMapOffset));
     __ testb(FieldOperand(scratch, Map::kBitFieldOffset),
              Immediate(1 << Map::kIsUndetectable));
@@ -1836,7 +1949,7 @@ Condition LCodeGen::EmitIsObject(Register input,
 
 
 void LCodeGen::DoIsObjectAndBranch(LIsObjectAndBranch* instr) {
-  Register reg = ToRegister(instr->InputAt(0));
+  Register reg = ToRegister(instr->value());
 
   int true_block = chunk_->LookupDestination(instr->true_block_id());
   int false_block = chunk_->LookupDestination(instr->false_block_id());
@@ -1860,8 +1973,8 @@ Condition LCodeGen::EmitIsString(Register input,
 
 
 void LCodeGen::DoIsStringAndBranch(LIsStringAndBranch* instr) {
-  Register reg = ToRegister(instr->InputAt(0));
-  Register temp = ToRegister(instr->TempAt(0));
+  Register reg = ToRegister(instr->value());
+  Register temp = ToRegister(instr->temp());
 
   int true_block = chunk_->LookupDestination(instr->true_block_id());
   int false_block = chunk_->LookupDestination(instr->false_block_id());
@@ -1878,11 +1991,11 @@ void LCodeGen::DoIsSmiAndBranch(LIsSmiAndBranch* instr) {
   int false_block = chunk_->LookupDestination(instr->false_block_id());
 
   Condition is_smi;
-  if (instr->InputAt(0)->IsRegister()) {
-    Register input = ToRegister(instr->InputAt(0));
+  if (instr->value()->IsRegister()) {
+    Register input = ToRegister(instr->value());
     is_smi = masm()->CheckSmi(input);
   } else {
-    Operand input = ToOperand(instr->InputAt(0));
+    Operand input = ToOperand(instr->value());
     is_smi = masm()->CheckSmi(input);
   }
   EmitBranch(true_block, false_block, is_smi);
@@ -1890,8 +2003,8 @@ void LCodeGen::DoIsSmiAndBranch(LIsSmiAndBranch* instr) {
 
 
 void LCodeGen::DoIsUndetectableAndBranch(LIsUndetectableAndBranch* instr) {
-  Register input = ToRegister(instr->InputAt(0));
-  Register temp = ToRegister(instr->TempAt(0));
+  Register input = ToRegister(instr->value());
+  Register temp = ToRegister(instr->temp());
 
   int true_block = chunk_->LookupDestination(instr->true_block_id());
   int false_block = chunk_->LookupDestination(instr->false_block_id());
@@ -1940,7 +2053,7 @@ static Condition BranchCondition(HHasInstanceTypeAndBranch* instr) {
 
 
 void LCodeGen::DoHasInstanceTypeAndBranch(LHasInstanceTypeAndBranch* instr) {
-  Register input = ToRegister(instr->InputAt(0));
+  Register input = ToRegister(instr->value());
 
   int true_block = chunk_->LookupDestination(instr->true_block_id());
   int false_block = chunk_->LookupDestination(instr->false_block_id());
@@ -1955,10 +2068,10 @@ void LCodeGen::DoHasInstanceTypeAndBranch(LHasInstanceTypeAndBranch* instr) {
 
 
 void LCodeGen::DoGetCachedArrayIndex(LGetCachedArrayIndex* instr) {
-  Register input = ToRegister(instr->InputAt(0));
+  Register input = ToRegister(instr->value());
   Register result = ToRegister(instr->result());
 
-  __ AbortIfNotString(input);
+  __ AssertString(input);
 
   __ movl(result, FieldOperand(input, String::kHashFieldOffset));
   ASSERT(String::kHashShift >= kSmiTagSize);
@@ -1968,7 +2081,7 @@ void LCodeGen::DoGetCachedArrayIndex(LGetCachedArrayIndex* instr) {
 
 void LCodeGen::DoHasCachedArrayIndexAndBranch(
     LHasCachedArrayIndexAndBranch* instr) {
-  Register input = ToRegister(instr->InputAt(0));
+  Register input = ToRegister(instr->value());
 
   int true_block = chunk_->LookupDestination(instr->true_block_id());
   int false_block = chunk_->LookupDestination(instr->false_block_id());
@@ -2048,9 +2161,9 @@ void LCodeGen::EmitClassOfTest(Label* is_true,
 
 
 void LCodeGen::DoClassOfTestAndBranch(LClassOfTestAndBranch* instr) {
-  Register input = ToRegister(instr->InputAt(0));
-  Register temp = ToRegister(instr->TempAt(0));
-  Register temp2 = ToRegister(instr->TempAt(1));
+  Register input = ToRegister(instr->value());
+  Register temp = ToRegister(instr->temp());
+  Register temp2 = ToRegister(instr->temp2());
   Handle<String> class_name = instr->hydrogen()->class_name();
 
   int true_block = chunk_->LookupDestination(instr->true_block_id());
@@ -2066,7 +2179,7 @@ void LCodeGen::DoClassOfTestAndBranch(LClassOfTestAndBranch* instr) {
 
 
 void LCodeGen::DoCmpMapAndBranch(LCmpMapAndBranch* instr) {
-  Register reg = ToRegister(instr->InputAt(0));
+  Register reg = ToRegister(instr->value());
   int true_block = instr->true_block_id();
   int false_block = instr->false_block_id();
 
@@ -2077,8 +2190,8 @@ void LCodeGen::DoCmpMapAndBranch(LCmpMapAndBranch* instr) {
 
 void LCodeGen::DoInstanceOf(LInstanceOf* instr) {
   InstanceofStub stub(InstanceofStub::kNoFlags);
-  __ push(ToRegister(instr->InputAt(0)));
-  __ push(ToRegister(instr->InputAt(1)));
+  __ push(ToRegister(instr->left()));
+  __ push(ToRegister(instr->right()));
   CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr);
   Label true_value, done;
   __ testq(rax, rax);
@@ -2112,7 +2225,7 @@ void LCodeGen::DoInstanceOfKnownGlobal(LInstanceOfKnownGlobal* instr) {
   deferred = new(zone()) DeferredInstanceOfKnownGlobal(this, instr);
 
   Label done, false_result;
-  Register object = ToRegister(instr->InputAt(0));
+  Register object = ToRegister(instr->value());
 
   // A Smi is not an instance of anything.
   __ JumpIfSmi(object, &false_result);
@@ -2122,7 +2235,7 @@ void LCodeGen::DoInstanceOfKnownGlobal(LInstanceOfKnownGlobal* instr) {
   // instanceof stub.
   Label cache_miss;
   // Use a temp register to avoid memory operands with variable lengths.
-  Register map = ToRegister(instr->TempAt(0));
+  Register map = ToRegister(instr->temp());
   __ movq(map, FieldOperand(object, HeapObject::kMapOffset));
   __ bind(deferred->map_check());  // Label for calculating code patching.
   Handle<JSGlobalPropertyCell> cache_cell =
@@ -2165,7 +2278,7 @@ void LCodeGen::DoDeferredInstanceOfKnownGlobal(LInstanceOfKnownGlobal* instr,
         InstanceofStub::kNoFlags | InstanceofStub::kCallSiteInlineCheck);
     InstanceofStub stub(flags);
 
-    __ push(ToRegister(instr->InputAt(0)));
+    __ push(ToRegister(instr->value()));
     __ PushHeapObject(instr->function());
 
     static const int kAdditionalDelta = 10;
@@ -2265,7 +2378,7 @@ void LCodeGen::DoStoreGlobalCell(LStoreGlobalCell* instr) {
   // it as no longer deleted. We deoptimize in that case.
   if (instr->hydrogen()->RequiresHoleCheck()) {
     // We have a temp because CompareRoot might clobber kScratchRegister.
-    Register cell = ToRegister(instr->TempAt(0));
+    Register cell = ToRegister(instr->temp());
     ASSERT(!value.is(cell));
     __ movq(cell, cell_handle, RelocInfo::GLOBAL_PROPERTY_CELL);
     __ CompareRoot(Operand(cell, 0), Heap::kTheHoleValueRootIndex);
@@ -2333,7 +2446,7 @@ void LCodeGen::DoStoreContextSlot(LStoreContextSlot* instr) {
     SmiCheck check_needed =
         type.IsHeapObject() ? OMIT_SMI_CHECK : INLINE_SMI_CHECK;
     int offset = Context::SlotOffset(instr->slot_index());
-    Register scratch = ToRegister(instr->TempAt(0));
+    Register scratch = ToRegister(instr->temp());
     __ RecordWriteContextSlot(context,
                               offset,
                               value,
@@ -2348,7 +2461,7 @@ void LCodeGen::DoStoreContextSlot(LStoreContextSlot* instr) {
 
 
 void LCodeGen::DoLoadNamedField(LLoadNamedField* instr) {
-  Register object = ToRegister(instr->InputAt(0));
+  Register object = ToRegister(instr->object());
   Register result = ToRegister(instr->result());
   if (instr->hydrogen()->is_in_object()) {
     __ movq(result, FieldOperand(object, instr->hydrogen()->offset()));
@@ -2520,7 +2633,7 @@ void LCodeGen::DoLoadFunctionPrototype(LLoadFunctionPrototype* instr) {
 
 void LCodeGen::DoLoadElements(LLoadElements* instr) {
   Register result = ToRegister(instr->result());
-  Register input = ToRegister(instr->InputAt(0));
+  Register input = ToRegister(instr->object());
   __ movq(result, FieldOperand(input, JSObject::kElementsOffset));
   if (FLAG_debug_code) {
     Label done, ok, fail;
@@ -2556,7 +2669,7 @@ void LCodeGen::DoLoadElements(LLoadElements* instr) {
 void LCodeGen::DoLoadExternalArrayPointer(
     LLoadExternalArrayPointer* instr) {
   Register result = ToRegister(instr->result());
-  Register input = ToRegister(instr->InputAt(0));
+  Register input = ToRegister(instr->object());
   __ movq(result, FieldOperand(input,
                                ExternalPixelArray::kExternalPointerOffset));
 }
@@ -2566,29 +2679,27 @@ void LCodeGen::DoAccessArgumentsAt(LAccessArgumentsAt* instr) {
   Register arguments = ToRegister(instr->arguments());
   Register length = ToRegister(instr->length());
   Register result = ToRegister(instr->result());
-
+  // There are two words between the frame pointer and the last argument.
+  // Subtracting from length accounts for one of them add one more.
   if (instr->index()->IsRegister()) {
     __ subl(length, ToRegister(instr->index()));
   } else {
     __ subl(length, ToOperand(instr->index()));
   }
-  DeoptimizeIf(below_equal, instr->environment());
-
-  // There are two words between the frame pointer and the last argument.
-  // Subtracting from length accounts for one of them add one more.
   __ movq(result, Operand(arguments, length, times_pointer_size, kPointerSize));
 }
 
 
-void LCodeGen::DoLoadKeyedFastElement(LLoadKeyedFastElement* instr) {
-  Register result = ToRegister(instr->result());
+void LCodeGen::DoLoadKeyedExternalArray(LLoadKeyed* instr) {
+  ElementsKind elements_kind = instr->elements_kind();
   LOperand* key = instr->key();
   if (!key->IsConstantOperand()) {
     Register key_reg = ToRegister(key);
-    // Even though the HLoad/StoreKeyedFastElement instructions force the input
-    // representation for the key to be an integer, the input gets replaced
-    // during bound check elimination with the index argument to the bounds
-    // check, which can be tagged, so that case must be handled here, too.
+    // Even though the HLoad/StoreKeyed (in this case) instructions force
+    // the input representation for the key to be an integer, the input
+    // gets replaced during bound check elimination with the index argument
+    // to the bounds check, which can be tagged, so that case must be
+    // handled here, too.
     if (instr->hydrogen()->key()->representation().IsTagged()) {
       __ SmiToInteger64(key_reg, key_reg);
     } else if (instr->hydrogen()->IsDehoisted()) {
@@ -2597,35 +2708,68 @@ void LCodeGen::DoLoadKeyedFastElement(LLoadKeyedFastElement* instr) {
       __ movsxlq(key_reg, key_reg);
     }
   }
+  Operand operand(BuildFastArrayOperand(
+      instr->elements(),
+      key,
+      elements_kind,
+      0,
+      instr->additional_index()));
 
-  // Load the result.
-  __ movq(result,
-          BuildFastArrayOperand(instr->elements(),
-                                key,
-                                FAST_ELEMENTS,
-                                FixedArray::kHeaderSize - kHeapObjectTag,
-                                instr->additional_index()));
-
-  // Check for the hole value.
-  if (instr->hydrogen()->RequiresHoleCheck()) {
-    if (IsFastSmiElementsKind(instr->hydrogen()->elements_kind())) {
-      Condition smi = __ CheckSmi(result);
-      DeoptimizeIf(NegateCondition(smi), instr->environment());
-    } else {
-      __ CompareRoot(result, Heap::kTheHoleValueRootIndex);
-      DeoptimizeIf(equal, instr->environment());
+  if (elements_kind == EXTERNAL_FLOAT_ELEMENTS) {
+    XMMRegister result(ToDoubleRegister(instr->result()));
+    __ movss(result, operand);
+    __ cvtss2sd(result, result);
+  } else if (elements_kind == EXTERNAL_DOUBLE_ELEMENTS) {
+    __ movsd(ToDoubleRegister(instr->result()), operand);
+  } else {
+    Register result(ToRegister(instr->result()));
+    switch (elements_kind) {
+      case EXTERNAL_BYTE_ELEMENTS:
+        __ movsxbq(result, operand);
+        break;
+      case EXTERNAL_UNSIGNED_BYTE_ELEMENTS:
+      case EXTERNAL_PIXEL_ELEMENTS:
+        __ movzxbq(result, operand);
+        break;
+      case EXTERNAL_SHORT_ELEMENTS:
+        __ movsxwq(result, operand);
+        break;
+      case EXTERNAL_UNSIGNED_SHORT_ELEMENTS:
+        __ movzxwq(result, operand);
+        break;
+      case EXTERNAL_INT_ELEMENTS:
+        __ movsxlq(result, operand);
+        break;
+      case EXTERNAL_UNSIGNED_INT_ELEMENTS:
+        __ movl(result, operand);
+        if (!instr->hydrogen()->CheckFlag(HInstruction::kUint32)) {
+          __ testl(result, result);
+          DeoptimizeIf(negative, instr->environment());
+        }
+        break;
+      case EXTERNAL_FLOAT_ELEMENTS:
+      case EXTERNAL_DOUBLE_ELEMENTS:
+      case FAST_ELEMENTS:
+      case FAST_SMI_ELEMENTS:
+      case FAST_DOUBLE_ELEMENTS:
+      case FAST_HOLEY_ELEMENTS:
+      case FAST_HOLEY_SMI_ELEMENTS:
+      case FAST_HOLEY_DOUBLE_ELEMENTS:
+      case DICTIONARY_ELEMENTS:
+      case NON_STRICT_ARGUMENTS_ELEMENTS:
+        UNREACHABLE();
+        break;
     }
   }
 }
 
 
-void LCodeGen::DoLoadKeyedFastDoubleElement(
-    LLoadKeyedFastDoubleElement* instr) {
+void LCodeGen::DoLoadKeyedFixedDoubleArray(LLoadKeyed* instr) {
   XMMRegister result(ToDoubleRegister(instr->result()));
   LOperand* key = instr->key();
   if (!key->IsConstantOperand()) {
     Register key_reg = ToRegister(key);
-    // Even though the HLoad/StoreKeyedFastElement instructions force the input
+    // Even though the HLoad/StoreKeyed instructions force the input
     // representation for the key to be an integer, the input gets replaced
     // during bound check elimination with the index argument to the bounds
     // check, which can be tagged, so that case must be handled here, too.
@@ -2661,6 +2805,57 @@ void LCodeGen::DoLoadKeyedFastDoubleElement(
 }
 
 
+void LCodeGen::DoLoadKeyedFixedArray(LLoadKeyed* instr) {
+  Register result = ToRegister(instr->result());
+  LOperand* key = instr->key();
+  if (!key->IsConstantOperand()) {
+    Register key_reg = ToRegister(key);
+    // Even though the HLoad/StoreKeyedFastElement instructions force
+    // the input representation for the key to be an integer, the input
+    // gets replaced during bound check elimination with the index
+    // argument to the bounds check, which can be tagged, so that
+    // case must be handled here, too.
+    if (instr->hydrogen()->key()->representation().IsTagged()) {
+      __ SmiToInteger64(key_reg, key_reg);
+    } else if (instr->hydrogen()->IsDehoisted()) {
+      // Sign extend key because it could be a 32 bit negative value
+      // and the dehoisted address computation happens in 64 bits
+      __ movsxlq(key_reg, key_reg);
+    }
+  }
+
+  // Load the result.
+  __ movq(result,
+          BuildFastArrayOperand(instr->elements(),
+                                key,
+                                FAST_ELEMENTS,
+                                FixedArray::kHeaderSize - kHeapObjectTag,
+                                instr->additional_index()));
+
+  // Check for the hole value.
+  if (instr->hydrogen()->RequiresHoleCheck()) {
+    if (IsFastSmiElementsKind(instr->hydrogen()->elements_kind())) {
+      Condition smi = __ CheckSmi(result);
+      DeoptimizeIf(NegateCondition(smi), instr->environment());
+    } else {
+      __ CompareRoot(result, Heap::kTheHoleValueRootIndex);
+      DeoptimizeIf(equal, instr->environment());
+    }
+  }
+}
+
+
+void LCodeGen::DoLoadKeyed(LLoadKeyed* instr) {
+  if (instr->is_external()) {
+    DoLoadKeyedExternalArray(instr);
+  } else if (instr->hydrogen()->representation().IsDouble()) {
+    DoLoadKeyedFixedDoubleArray(instr);
+  } else {
+    DoLoadKeyedFixedArray(instr);
+  }
+}
+
+
 Operand LCodeGen::BuildFastArrayOperand(
     LOperand* elements_pointer,
     LOperand* key,
@@ -2687,80 +2882,6 @@ Operand LCodeGen::BuildFastArrayOperand(
 }
 
 
-void LCodeGen::DoLoadKeyedSpecializedArrayElement(
-    LLoadKeyedSpecializedArrayElement* instr) {
-  ElementsKind elements_kind = instr->elements_kind();
-  LOperand* key = instr->key();
-  if (!key->IsConstantOperand()) {
-    Register key_reg = ToRegister(key);
-    // Even though the HLoad/StoreKeyedFastElement instructions force the input
-    // representation for the key to be an integer, the input gets replaced
-    // during bound check elimination with the index argument to the bounds
-    // check, which can be tagged, so that case must be handled here, too.
-    if (instr->hydrogen()->key()->representation().IsTagged()) {
-      __ SmiToInteger64(key_reg, key_reg);
-    } else if (instr->hydrogen()->IsDehoisted()) {
-      // Sign extend key because it could be a 32 bit negative value
-      // and the dehoisted address computation happens in 64 bits
-      __ movsxlq(key_reg, key_reg);
-    }
-  }
-  Operand operand(BuildFastArrayOperand(
-      instr->external_pointer(),
-      key,
-      elements_kind,
-      0,
-      instr->additional_index()));
-
-  if (elements_kind == EXTERNAL_FLOAT_ELEMENTS) {
-    XMMRegister result(ToDoubleRegister(instr->result()));
-    __ movss(result, operand);
-    __ cvtss2sd(result, result);
-  } else if (elements_kind == EXTERNAL_DOUBLE_ELEMENTS) {
-    __ movsd(ToDoubleRegister(instr->result()), operand);
-  } else {
-    Register result(ToRegister(instr->result()));
-    switch (elements_kind) {
-      case EXTERNAL_BYTE_ELEMENTS:
-        __ movsxbq(result, operand);
-        break;
-      case EXTERNAL_UNSIGNED_BYTE_ELEMENTS:
-      case EXTERNAL_PIXEL_ELEMENTS:
-        __ movzxbq(result, operand);
-        break;
-      case EXTERNAL_SHORT_ELEMENTS:
-        __ movsxwq(result, operand);
-        break;
-      case EXTERNAL_UNSIGNED_SHORT_ELEMENTS:
-        __ movzxwq(result, operand);
-        break;
-      case EXTERNAL_INT_ELEMENTS:
-        __ movsxlq(result, operand);
-        break;
-      case EXTERNAL_UNSIGNED_INT_ELEMENTS:
-        __ movl(result, operand);
-        if (!instr->hydrogen()->CheckFlag(HInstruction::kUint32)) {
-          __ testl(result, result);
-          DeoptimizeIf(negative, instr->environment());
-        }
-        break;
-      case EXTERNAL_FLOAT_ELEMENTS:
-      case EXTERNAL_DOUBLE_ELEMENTS:
-      case FAST_ELEMENTS:
-      case FAST_SMI_ELEMENTS:
-      case FAST_DOUBLE_ELEMENTS:
-      case FAST_HOLEY_ELEMENTS:
-      case FAST_HOLEY_SMI_ELEMENTS:
-      case FAST_HOLEY_DOUBLE_ELEMENTS:
-      case DICTIONARY_ELEMENTS:
-      case NON_STRICT_ARGUMENTS_ELEMENTS:
-        UNREACHABLE();
-        break;
-    }
-  }
-}
-
-
 void LCodeGen::DoLoadKeyedGeneric(LLoadKeyedGeneric* instr) {
   ASSERT(ToRegister(instr->object()).is(rdx));
   ASSERT(ToRegister(instr->key()).is(rax));
@@ -2804,10 +2925,10 @@ void LCodeGen::DoArgumentsLength(LArgumentsLength* instr) {
   Label done;
 
   // If no arguments adaptor frame the number of arguments is fixed.
-  if (instr->InputAt(0)->IsRegister()) {
-    __ cmpq(rbp, ToRegister(instr->InputAt(0)));
+  if (instr->elements()->IsRegister()) {
+    __ cmpq(rbp, ToRegister(instr->elements()));
   } else {
-    __ cmpq(rbp, ToOperand(instr->InputAt(0)));
+    __ cmpq(rbp, ToOperand(instr->elements()));
   }
   __ movl(result, Immediate(scope()->num_parameters()));
   __ j(equal, &done, Label::kNear);
@@ -2915,7 +3036,7 @@ void LCodeGen::DoApplyArguments(LApplyArguments* instr) {
 
 
 void LCodeGen::DoPushArgument(LPushArgument* instr) {
-  LOperand* argument = instr->InputAt(0);
+  LOperand* argument = instr->value();
   EmitPushTaggedOperand(argument);
 }
 
@@ -3025,7 +3146,7 @@ void LCodeGen::DoCallConstantFunction(LCallConstantFunction* instr) {
 
 
 void LCodeGen::DoDeferredMathAbsTaggedHeapNumber(LUnaryMathOperation* instr) {
-  Register input_reg = ToRegister(instr->InputAt(0));
+  Register input_reg = ToRegister(instr->value());
   __ CompareRoot(FieldOperand(input_reg, HeapObject::kMapOffset),
                  Heap::kHeapNumberMapRootIndex);
   DeoptimizeIf(not_equal, instr->environment());
@@ -3077,7 +3198,7 @@ void LCodeGen::DoDeferredMathAbsTaggedHeapNumber(LUnaryMathOperation* instr) {
 
 
 void LCodeGen::EmitIntegerMathAbs(LUnaryMathOperation* instr) {
-  Register input_reg = ToRegister(instr->InputAt(0));
+  Register input_reg = ToRegister(instr->value());
   __ testl(input_reg, input_reg);
   Label is_positive;
   __ j(not_sign, &is_positive);
@@ -3102,12 +3223,12 @@ void LCodeGen::DoMathAbs(LUnaryMathOperation* instr) {
     LUnaryMathOperation* instr_;
   };
 
-  ASSERT(instr->InputAt(0)->Equals(instr->result()));
+  ASSERT(instr->value()->Equals(instr->result()));
   Representation r = instr->hydrogen()->value()->representation();
 
   if (r.IsDouble()) {
     XMMRegister scratch = xmm0;
-    XMMRegister input_reg = ToDoubleRegister(instr->InputAt(0));
+    XMMRegister input_reg = ToDoubleRegister(instr->value());
     __ xorps(scratch, scratch);
     __ subsd(scratch, input_reg);
     __ andpd(input_reg, scratch);
@@ -3116,7 +3237,7 @@ void LCodeGen::DoMathAbs(LUnaryMathOperation* instr) {
   } else {  // Tagged case.
     DeferredMathAbsTaggedHeapNumber* deferred =
         new(zone()) DeferredMathAbsTaggedHeapNumber(this, instr);
-    Register input_reg = ToRegister(instr->InputAt(0));
+    Register input_reg = ToRegister(instr->value());
     // Smi check.
     __ JumpIfNotSmi(input_reg, deferred->entry());
     __ SmiToInteger32(input_reg, input_reg);
@@ -3130,7 +3251,7 @@ void LCodeGen::DoMathAbs(LUnaryMathOperation* instr) {
 void LCodeGen::DoMathFloor(LUnaryMathOperation* instr) {
   XMMRegister xmm_scratch = xmm0;
   Register output_reg = ToRegister(instr->result());
-  XMMRegister input_reg = ToDoubleRegister(instr->InputAt(0));
+  XMMRegister input_reg = ToDoubleRegister(instr->value());
 
   if (CpuFeatures::IsSupported(SSE4_1)) {
     CpuFeatures::Scope scope(SSE4_1);
@@ -3189,7 +3310,7 @@ void LCodeGen::DoMathFloor(LUnaryMathOperation* instr) {
 void LCodeGen::DoMathRound(LUnaryMathOperation* instr) {
   const XMMRegister xmm_scratch = xmm0;
   Register output_reg = ToRegister(instr->result());
-  XMMRegister input_reg = ToDoubleRegister(instr->InputAt(0));
+  XMMRegister input_reg = ToDoubleRegister(instr->value());
 
   Label done;
   // xmm_scratch = 0.5
@@ -3234,7 +3355,7 @@ void LCodeGen::DoMathRound(LUnaryMathOperation* instr) {
 
 
 void LCodeGen::DoMathSqrt(LUnaryMathOperation* instr) {
-  XMMRegister input_reg = ToDoubleRegister(instr->InputAt(0));
+  XMMRegister input_reg = ToDoubleRegister(instr->value());
   ASSERT(ToDoubleRegister(instr->result()).is(input_reg));
   __ sqrtsd(input_reg, input_reg);
 }
@@ -3242,7 +3363,7 @@ void LCodeGen::DoMathSqrt(LUnaryMathOperation* instr) {
 
 void LCodeGen::DoMathPowHalf(LUnaryMathOperation* instr) {
   XMMRegister xmm_scratch = xmm0;
-  XMMRegister input_reg = ToDoubleRegister(instr->InputAt(0));
+  XMMRegister input_reg = ToDoubleRegister(instr->value());
   ASSERT(ToDoubleRegister(instr->result()).is(input_reg));
 
   // Note that according to ECMA-262 15.8.2.13:
@@ -3283,11 +3404,11 @@ void LCodeGen::DoPower(LPower* instr) {
 #else
   Register exponent = rdi;
 #endif
-  ASSERT(!instr->InputAt(1)->IsRegister() ||
-         ToRegister(instr->InputAt(1)).is(exponent));
-  ASSERT(!instr->InputAt(1)->IsDoubleRegister() ||
-         ToDoubleRegister(instr->InputAt(1)).is(xmm1));
-  ASSERT(ToDoubleRegister(instr->InputAt(0)).is(xmm2));
+  ASSERT(!instr->right()->IsRegister() ||
+         ToRegister(instr->right()).is(exponent));
+  ASSERT(!instr->right()->IsDoubleRegister() ||
+         ToDoubleRegister(instr->right()).is(xmm1));
+  ASSERT(ToDoubleRegister(instr->left()).is(xmm2));
   ASSERT(ToDoubleRegister(instr->result()).is(xmm3));
 
   if (exponent_type.IsTagged()) {
@@ -3329,10 +3450,10 @@ void LCodeGen::DoRandom(LRandom* instr) {
   // Choose the right register for the first argument depending on
   // calling convention.
 #ifdef _WIN64
-  ASSERT(ToRegister(instr->InputAt(0)).is(rcx));
+  ASSERT(ToRegister(instr->global_object()).is(rcx));
   Register global_object = rcx;
 #else
-  ASSERT(ToRegister(instr->InputAt(0)).is(rdi));
+  ASSERT(ToRegister(instr->global_object()).is(rdi));
   Register global_object = rdi;
 #endif
 
@@ -3399,6 +3520,16 @@ void LCodeGen::DoDeferredRandom(LRandom* instr) {
 }
 
 
+void LCodeGen::DoMathExp(LMathExp* instr) {
+  XMMRegister input = ToDoubleRegister(instr->value());
+  XMMRegister result = ToDoubleRegister(instr->result());
+  Register temp1 = ToRegister(instr->temp1());
+  Register temp2 = ToRegister(instr->temp2());
+
+  MathExpGenerator::EmitMathExp(masm(), input, result, xmm0, temp1, temp2);
+}
+
+
 void LCodeGen::DoMathLog(LUnaryMathOperation* instr) {
   ASSERT(ToDoubleRegister(instr->result()).is(xmm1));
   TranscendentalCacheStub stub(TranscendentalCache::LOG,
@@ -3547,7 +3678,7 @@ void LCodeGen::DoCallKnownGlobal(LCallKnownGlobal* instr) {
 
 
 void LCodeGen::DoCallNew(LCallNew* instr) {
-  ASSERT(ToRegister(instr->InputAt(0)).is(rdi));
+  ASSERT(ToRegister(instr->constructor()).is(rdi));
   ASSERT(ToRegister(instr->result()).is(rax));
 
   CallConstructStub stub(NO_CALL_FUNCTION_FLAGS);
@@ -3571,7 +3702,7 @@ void LCodeGen::DoStoreNamedField(LStoreNamedField* instr) {
       __ Move(FieldOperand(object, HeapObject::kMapOffset),
               instr->transition());
     } else {
-      Register temp = ToRegister(instr->TempAt(0));
+      Register temp = ToRegister(instr->temp());
       __ Move(kScratchRegister, instr->transition());
       __ movq(FieldOperand(object, HeapObject::kMapOffset), kScratchRegister);
       // Update the write barrier for the map field.
@@ -3592,7 +3723,7 @@ void LCodeGen::DoStoreNamedField(LStoreNamedField* instr) {
   if (instr->is_in_object()) {
     __ movq(FieldOperand(object, offset), value);
     if (instr->hydrogen()->NeedsWriteBarrier()) {
-      Register temp = ToRegister(instr->TempAt(0));
+      Register temp = ToRegister(instr->temp());
       // Update the write barrier for the object for in-object properties.
       __ RecordWriteField(object,
                           offset,
@@ -3603,7 +3734,7 @@ void LCodeGen::DoStoreNamedField(LStoreNamedField* instr) {
                           check_needed);
     }
   } else {
-    Register temp = ToRegister(instr->TempAt(0));
+    Register temp = ToRegister(instr->temp());
     __ movq(temp, FieldOperand(object, JSObject::kPropertiesOffset));
     __ movq(FieldOperand(temp, offset), value);
     if (instr->hydrogen()->NeedsWriteBarrier()) {
@@ -3633,70 +3764,6 @@ void LCodeGen::DoStoreNamedGeneric(LStoreNamedGeneric* instr) {
 }
 
 
-void LCodeGen::DoStoreKeyedSpecializedArrayElement(
-    LStoreKeyedSpecializedArrayElement* instr) {
-  ElementsKind elements_kind = instr->elements_kind();
-  LOperand* key = instr->key();
-  if (!key->IsConstantOperand()) {
-    Register key_reg = ToRegister(key);
-    // Even though the HLoad/StoreKeyedFastElement instructions force the input
-    // representation for the key to be an integer, the input gets replaced
-    // during bound check elimination with the index argument to the bounds
-    // check, which can be tagged, so that case must be handled here, too.
-    if (instr->hydrogen()->key()->representation().IsTagged()) {
-      __ SmiToInteger64(key_reg, key_reg);
-    } else if (instr->hydrogen()->IsDehoisted()) {
-      // Sign extend key because it could be a 32 bit negative value
-      // and the dehoisted address computation happens in 64 bits
-      __ movsxlq(key_reg, key_reg);
-    }
-  }
-  Operand operand(BuildFastArrayOperand(
-      instr->external_pointer(),
-      key,
-      elements_kind,
-      0,
-      instr->additional_index()));
-
-  if (elements_kind == EXTERNAL_FLOAT_ELEMENTS) {
-    XMMRegister value(ToDoubleRegister(instr->value()));
-    __ cvtsd2ss(value, value);
-    __ movss(operand, value);
-  } else if (elements_kind == EXTERNAL_DOUBLE_ELEMENTS) {
-    __ movsd(operand, ToDoubleRegister(instr->value()));
-  } else {
-    Register value(ToRegister(instr->value()));
-    switch (elements_kind) {
-      case EXTERNAL_PIXEL_ELEMENTS:
-      case EXTERNAL_BYTE_ELEMENTS:
-      case EXTERNAL_UNSIGNED_BYTE_ELEMENTS:
-        __ movb(operand, value);
-        break;
-      case EXTERNAL_SHORT_ELEMENTS:
-      case EXTERNAL_UNSIGNED_SHORT_ELEMENTS:
-        __ movw(operand, value);
-        break;
-      case EXTERNAL_INT_ELEMENTS:
-      case EXTERNAL_UNSIGNED_INT_ELEMENTS:
-        __ movl(operand, value);
-        break;
-      case EXTERNAL_FLOAT_ELEMENTS:
-      case EXTERNAL_DOUBLE_ELEMENTS:
-      case FAST_ELEMENTS:
-      case FAST_SMI_ELEMENTS:
-      case FAST_DOUBLE_ELEMENTS:
-      case FAST_HOLEY_ELEMENTS:
-      case FAST_HOLEY_SMI_ELEMENTS:
-      case FAST_HOLEY_DOUBLE_ELEMENTS:
-      case DICTIONARY_ELEMENTS:
-      case NON_STRICT_ARGUMENTS_ELEMENTS:
-        UNREACHABLE();
-        break;
-    }
-  }
-}
-
-
 void LCodeGen::DeoptIfTaggedButNotSmi(LEnvironment* environment,
                                       HValue* value,
                                       LOperand* operand) {
@@ -3721,9 +3788,8 @@ void LCodeGen::DoBoundsCheck(LBoundsCheck* instr) {
                          instr->index());
   if (instr->length()->IsRegister()) {
     Register reg = ToRegister(instr->length());
-    if (FLAG_debug_code &&
-        !instr->hydrogen()->length()->representation().IsTagged()) {
-      __ AbortIfNotZeroExtended(reg);
+    if (!instr->hydrogen()->length()->representation().IsTagged()) {
+      __ AssertZeroExtended(reg);
     }
     if (instr->index()->IsConstantOperand()) {
       int constant_index =
@@ -3735,9 +3801,8 @@ void LCodeGen::DoBoundsCheck(LBoundsCheck* instr) {
       }
     } else {
       Register reg2 = ToRegister(instr->index());
-      if (FLAG_debug_code &&
-          !instr->hydrogen()->index()->representation().IsTagged()) {
-        __ AbortIfNotZeroExtended(reg2);
+      if (!instr->hydrogen()->index()->representation().IsTagged()) {
+        __ AssertZeroExtended(reg2);
       }
       __ cmpq(reg, reg2);
     }
@@ -3759,16 +3824,16 @@ void LCodeGen::DoBoundsCheck(LBoundsCheck* instr) {
 }
 
 
-void LCodeGen::DoStoreKeyedFastElement(LStoreKeyedFastElement* instr) {
-  Register value = ToRegister(instr->value());
-  Register elements = ToRegister(instr->object());
+void LCodeGen::DoStoreKeyedExternalArray(LStoreKeyed* instr) {
+  ElementsKind elements_kind = instr->elements_kind();
   LOperand* key = instr->key();
   if (!key->IsConstantOperand()) {
     Register key_reg = ToRegister(key);
-    // Even though the HLoad/StoreKeyedFastElement instructions force the input
-    // representation for the key to be an integer, the input gets replaced
-    // during bound check elimination with the index argument to the bounds
-    // check, which can be tagged, so that case must be handled here, too.
+    // Even though the HLoad/StoreKeyedFastElement instructions force
+    // the input representation for the key to be an integer, the input
+    // gets replaced during bound check elimination with the index
+    // argument to the bounds check, which can be tagged, so that case
+    // must be handled here, too.
     if (instr->hydrogen()->key()->representation().IsTagged()) {
       __ SmiToInteger64(key_reg, key_reg);
     } else if (instr->hydrogen()->IsDehoisted()) {
@@ -3777,45 +3842,62 @@ void LCodeGen::DoStoreKeyedFastElement(LStoreKeyedFastElement* instr) {
       __ movsxlq(key_reg, key_reg);
     }
   }
+  Operand operand(BuildFastArrayOperand(
+      instr->elements(),
+      key,
+      elements_kind,
+      0,
+      instr->additional_index()));
 
-  Operand operand =
-      BuildFastArrayOperand(instr->object(),
-                            key,
-                            FAST_ELEMENTS,
-                            FixedArray::kHeaderSize - kHeapObjectTag,
-                            instr->additional_index());
-
-  if (instr->hydrogen()->NeedsWriteBarrier()) {
-    ASSERT(!instr->key()->IsConstantOperand());
-    HType type = instr->hydrogen()->value()->type();
-    SmiCheck check_needed =
-        type.IsHeapObject() ? OMIT_SMI_CHECK : INLINE_SMI_CHECK;
-    // Compute address of modified element and store it into key register.
-    Register key_reg(ToRegister(key));
-    __ lea(key_reg, operand);
-    __ movq(Operand(key_reg, 0), value);
-    __ RecordWrite(elements,
-                   key_reg,
-                   value,
-                   kSaveFPRegs,
-                   EMIT_REMEMBERED_SET,
-                   check_needed);
+  if (elements_kind == EXTERNAL_FLOAT_ELEMENTS) {
+    XMMRegister value(ToDoubleRegister(instr->value()));
+    __ cvtsd2ss(value, value);
+    __ movss(operand, value);
+  } else if (elements_kind == EXTERNAL_DOUBLE_ELEMENTS) {
+    __ movsd(operand, ToDoubleRegister(instr->value()));
   } else {
-    __ movq(operand, value);
+    Register value(ToRegister(instr->value()));
+    switch (elements_kind) {
+      case EXTERNAL_PIXEL_ELEMENTS:
+      case EXTERNAL_BYTE_ELEMENTS:
+      case EXTERNAL_UNSIGNED_BYTE_ELEMENTS:
+        __ movb(operand, value);
+        break;
+      case EXTERNAL_SHORT_ELEMENTS:
+      case EXTERNAL_UNSIGNED_SHORT_ELEMENTS:
+        __ movw(operand, value);
+        break;
+      case EXTERNAL_INT_ELEMENTS:
+      case EXTERNAL_UNSIGNED_INT_ELEMENTS:
+        __ movl(operand, value);
+        break;
+      case EXTERNAL_FLOAT_ELEMENTS:
+      case EXTERNAL_DOUBLE_ELEMENTS:
+      case FAST_ELEMENTS:
+      case FAST_SMI_ELEMENTS:
+      case FAST_DOUBLE_ELEMENTS:
+      case FAST_HOLEY_ELEMENTS:
+      case FAST_HOLEY_SMI_ELEMENTS:
+      case FAST_HOLEY_DOUBLE_ELEMENTS:
+      case DICTIONARY_ELEMENTS:
+      case NON_STRICT_ARGUMENTS_ELEMENTS:
+        UNREACHABLE();
+        break;
+    }
   }
 }
 
 
-void LCodeGen::DoStoreKeyedFastDoubleElement(
-    LStoreKeyedFastDoubleElement* instr) {
+void LCodeGen::DoStoreKeyedFixedDoubleArray(LStoreKeyed* instr) {
   XMMRegister value = ToDoubleRegister(instr->value());
   LOperand* key = instr->key();
   if (!key->IsConstantOperand()) {
     Register key_reg = ToRegister(key);
-    // Even though the HLoad/StoreKeyedFastElement instructions force the input
-    // representation for the key to be an integer, the input gets replaced
-    // during bound check elimination with the index argument to the bounds
-    // check, which can be tagged, so that case must be handled here, too.
+    // Even though the HLoad/StoreKeyedFastElement instructions force
+    // the input representation for the key to be an integer, the
+    // input gets replaced during bound check elimination with the index
+    // argument to the bounds check, which can be tagged, so that case
+    // must be handled here, too.
     if (instr->hydrogen()->key()->representation().IsTagged()) {
       __ SmiToInteger64(key_reg, key_reg);
     } else if (instr->hydrogen()->IsDehoisted()) {
@@ -3848,6 +3930,66 @@ void LCodeGen::DoStoreKeyedFastDoubleElement(
   __ movsd(double_store_operand, value);
 }
 
+
+void LCodeGen::DoStoreKeyedFixedArray(LStoreKeyed* instr) {
+  Register value = ToRegister(instr->value());
+  Register elements = ToRegister(instr->elements());
+  LOperand* key = instr->key();
+  if (!key->IsConstantOperand()) {
+    Register key_reg = ToRegister(key);
+    // Even though the HLoad/StoreKeyedFastElement instructions force
+    // the input representation for the key to be an integer, the
+    // input gets replaced during bound check elimination with the index
+    // argument to the bounds check, which can be tagged, so that case
+    // must be handled here, too.
+    if (instr->hydrogen()->key()->representation().IsTagged()) {
+      __ SmiToInteger64(key_reg, key_reg);
+    } else if (instr->hydrogen()->IsDehoisted()) {
+      // Sign extend key because it could be a 32 bit negative value
+      // and the dehoisted address computation happens in 64 bits
+      __ movsxlq(key_reg, key_reg);
+    }
+  }
+
+  Operand operand =
+      BuildFastArrayOperand(instr->elements(),
+                            key,
+                            FAST_ELEMENTS,
+                            FixedArray::kHeaderSize - kHeapObjectTag,
+                            instr->additional_index());
+
+  if (instr->hydrogen()->NeedsWriteBarrier()) {
+    ASSERT(!instr->key()->IsConstantOperand());
+    HType type = instr->hydrogen()->value()->type();
+    SmiCheck check_needed =
+        type.IsHeapObject() ? OMIT_SMI_CHECK : INLINE_SMI_CHECK;
+    // Compute address of modified element and store it into key register.
+    Register key_reg(ToRegister(key));
+    __ lea(key_reg, operand);
+    __ movq(Operand(key_reg, 0), value);
+    __ RecordWrite(elements,
+                   key_reg,
+                   value,
+                   kSaveFPRegs,
+                   EMIT_REMEMBERED_SET,
+                   check_needed);
+  } else {
+    __ movq(operand, value);
+  }
+}
+
+
+void LCodeGen::DoStoreKeyed(LStoreKeyed* instr) {
+  if (instr->is_external()) {
+    DoStoreKeyedExternalArray(instr);
+  } else if (instr->hydrogen()->value()->representation().IsDouble()) {
+    DoStoreKeyedFixedDoubleArray(instr);
+  } else {
+    DoStoreKeyedFixedArray(instr);
+  }
+}
+
+
 void LCodeGen::DoStoreKeyedGeneric(LStoreKeyedGeneric* instr) {
   ASSERT(ToRegister(instr->object()).is(rdx));
   ASSERT(ToRegister(instr->key()).is(rcx));
@@ -3862,7 +4004,7 @@ void LCodeGen::DoStoreKeyedGeneric(LStoreKeyedGeneric* instr) {
 
 void LCodeGen::DoTransitionElementsKind(LTransitionElementsKind* instr) {
   Register object_reg = ToRegister(instr->object());
-  Register new_map_reg = ToRegister(instr->new_map_reg());
+  Register new_map_reg = ToRegister(instr->new_map_temp());
 
   Handle<Map> from_map = instr->original_map();
   Handle<Map> to_map = instr->transitioned_map();
@@ -3876,12 +4018,12 @@ void LCodeGen::DoTransitionElementsKind(LTransitionElementsKind* instr) {
   if (IsSimpleMapChangeTransition(from_kind, to_kind)) {
     __ movq(FieldOperand(object_reg, HeapObject::kMapOffset), new_map_reg);
     // Write barrier.
-    ASSERT_NE(instr->temp_reg(), NULL);
+    ASSERT_NE(instr->temp(), NULL);
     __ RecordWriteField(object_reg, HeapObject::kMapOffset, new_map_reg,
-                        ToRegister(instr->temp_reg()), kDontSaveFPRegs);
+                        ToRegister(instr->temp()), kDontSaveFPRegs);
   } else if (IsFastSmiElementsKind(from_kind) &&
              IsFastDoubleElementsKind(to_kind)) {
-    Register fixed_object_reg = ToRegister(instr->temp_reg());
+    Register fixed_object_reg = ToRegister(instr->temp());
     ASSERT(fixed_object_reg.is(rdx));
     ASSERT(new_map_reg.is(rbx));
     __ movq(fixed_object_reg, object_reg);
@@ -3889,7 +4031,7 @@ void LCodeGen::DoTransitionElementsKind(LTransitionElementsKind* instr) {
              RelocInfo::CODE_TARGET, instr);
   } else if (IsFastDoubleElementsKind(from_kind) &&
              IsFastObjectElementsKind(to_kind)) {
-    Register fixed_object_reg = ToRegister(instr->temp_reg());
+    Register fixed_object_reg = ToRegister(instr->temp());
     ASSERT(fixed_object_reg.is(rdx));
     ASSERT(new_map_reg.is(rbx));
     __ movq(fixed_object_reg, object_reg);
@@ -3956,9 +4098,7 @@ void LCodeGen::DoDeferredStringCharCodeAt(LStringCharCodeAt* instr) {
     __ push(index);
   }
   CallRuntimeFromDeferred(Runtime::kStringCharCodeAt, 2, instr);
-  if (FLAG_debug_code) {
-    __ AbortIfNotSmi(rax);
-  }
+  __ AssertSmi(rax);
   __ SmiToInteger32(rax, rax);
   __ StoreToSafepointRegisterSlot(result, rax);
 }
@@ -4020,7 +4160,7 @@ void LCodeGen::DoStringLength(LStringLength* instr) {
 
 
 void LCodeGen::DoInteger32ToDouble(LInteger32ToDouble* instr) {
-  LOperand* input = instr->InputAt(0);
+  LOperand* input = instr->value();
   ASSERT(input->IsRegister() || input->IsStackSlot());
   LOperand* output = instr->result();
   ASSERT(output->IsDoubleRegister());
@@ -4033,9 +4173,9 @@ void LCodeGen::DoInteger32ToDouble(LInteger32ToDouble* instr) {
 
 
 void LCodeGen::DoUint32ToDouble(LUint32ToDouble* instr) {
-  LOperand* input = instr->InputAt(0);
+  LOperand* input = instr->value();
   LOperand* output = instr->result();
-  LOperand* temp = instr->TempAt(0);
+  LOperand* temp = instr->temp();
 
   __ LoadUint32(ToDoubleRegister(output),
                 ToRegister(input),
@@ -4044,7 +4184,7 @@ void LCodeGen::DoUint32ToDouble(LUint32ToDouble* instr) {
 
 
 void LCodeGen::DoNumberTagI(LNumberTagI* instr) {
-  LOperand* input = instr->InputAt(0);
+  LOperand* input = instr->value();
   ASSERT(input->IsRegister() && input->Equals(instr->result()));
   Register reg = ToRegister(input);
 
@@ -4065,7 +4205,7 @@ void LCodeGen::DoNumberTagU(LNumberTagU* instr) {
     LNumberTagU* instr_;
   };
 
-  LOperand* input = instr->InputAt(0);
+  LOperand* input = instr->value();
   ASSERT(input->IsRegister() && input->Equals(instr->result()));
   Register reg = ToRegister(input);
 
@@ -4079,7 +4219,7 @@ void LCodeGen::DoNumberTagU(LNumberTagU* instr) {
 
 void LCodeGen::DoDeferredNumberTagU(LNumberTagU* instr) {
   Label slow;
-  Register reg = ToRegister(instr->InputAt(0));
+  Register reg = ToRegister(instr->value());
   Register tmp = reg.is(rax) ? rcx : rax;
 
   // Preserve the value of all registers.
@@ -4126,9 +4266,9 @@ void LCodeGen::DoNumberTagD(LNumberTagD* instr) {
     LNumberTagD* instr_;
   };
 
-  XMMRegister input_reg = ToDoubleRegister(instr->InputAt(0));
+  XMMRegister input_reg = ToDoubleRegister(instr->value());
   Register reg = ToRegister(instr->result());
-  Register tmp = ToRegister(instr->TempAt(0));
+  Register tmp = ToRegister(instr->temp());
 
   DeferredNumberTagD* deferred = new(zone()) DeferredNumberTagD(this, instr);
   if (FLAG_inline_new) {
@@ -4159,23 +4299,21 @@ void LCodeGen::DoDeferredNumberTagD(LNumberTagD* instr) {
 
 
 void LCodeGen::DoSmiTag(LSmiTag* instr) {
-  ASSERT(instr->InputAt(0)->Equals(instr->result()));
-  Register input = ToRegister(instr->InputAt(0));
+  ASSERT(instr->value()->Equals(instr->result()));
+  Register input = ToRegister(instr->value());
   ASSERT(!instr->hydrogen_value()->CheckFlag(HValue::kCanOverflow));
   __ Integer32ToSmi(input, input);
 }
 
 
 void LCodeGen::DoSmiUntag(LSmiUntag* instr) {
-  ASSERT(instr->InputAt(0)->Equals(instr->result()));
-  Register input = ToRegister(instr->InputAt(0));
+  ASSERT(instr->value()->Equals(instr->result()));
+  Register input = ToRegister(instr->value());
   if (instr->needs_check()) {
     Condition is_smi = __ CheckSmi(input);
     DeoptimizeIf(NegateCondition(is_smi), instr->environment());
   } else {
-    if (FLAG_debug_code) {
-      __ AbortIfNotSmi(input);
-    }
+    __ AssertSmi(input);
   }
   __ SmiToInteger32(input, input);
 }
@@ -4233,7 +4371,7 @@ void LCodeGen::EmitNumberUntagD(Register input_reg,
 
 void LCodeGen::DoDeferredTaggedToI(LTaggedToI* instr) {
   Label done, heap_number;
-  Register input_reg = ToRegister(instr->InputAt(0));
+  Register input_reg = ToRegister(instr->value());
 
   // Heap number map check.
   __ CompareRoot(FieldOperand(input_reg, HeapObject::kMapOffset),
@@ -4259,7 +4397,7 @@ void LCodeGen::DoDeferredTaggedToI(LTaggedToI* instr) {
     // Deoptimize if we don't have a heap number.
     DeoptimizeIf(not_equal, instr->environment());
 
-    XMMRegister xmm_temp = ToDoubleRegister(instr->TempAt(0));
+    XMMRegister xmm_temp = ToDoubleRegister(instr->temp());
     __ movsd(xmm0, FieldOperand(input_reg, HeapNumber::kValueOffset));
     __ cvttsd2si(input_reg, xmm0);
     __ cvtlsi2sd(xmm_temp, input_reg);
@@ -4289,7 +4427,7 @@ void LCodeGen::DoTaggedToI(LTaggedToI* instr) {
     LTaggedToI* instr_;
   };
 
-  LOperand* input = instr->InputAt(0);
+  LOperand* input = instr->value();
   ASSERT(input->IsRegister());
   ASSERT(input->Equals(instr->result()));
 
@@ -4302,7 +4440,7 @@ void LCodeGen::DoTaggedToI(LTaggedToI* instr) {
 
 
 void LCodeGen::DoNumberUntagD(LNumberUntagD* instr) {
-  LOperand* input = instr->InputAt(0);
+  LOperand* input = instr->value();
   ASSERT(input->IsRegister());
   LOperand* result = instr->result();
   ASSERT(result->IsDoubleRegister());
@@ -4318,7 +4456,7 @@ void LCodeGen::DoNumberUntagD(LNumberUntagD* instr) {
 
 
 void LCodeGen::DoDoubleToI(LDoubleToI* instr) {
-  LOperand* input = instr->InputAt(0);
+  LOperand* input = instr->value();
   ASSERT(input->IsDoubleRegister());
   LOperand* result = instr->result();
   ASSERT(result->IsRegister());
@@ -4358,21 +4496,21 @@ void LCodeGen::DoDoubleToI(LDoubleToI* instr) {
 
 
 void LCodeGen::DoCheckSmi(LCheckSmi* instr) {
-  LOperand* input = instr->InputAt(0);
+  LOperand* input = instr->value();
   Condition cc = masm()->CheckSmi(ToRegister(input));
   DeoptimizeIf(NegateCondition(cc), instr->environment());
 }
 
 
 void LCodeGen::DoCheckNonSmi(LCheckNonSmi* instr) {
-  LOperand* input = instr->InputAt(0);
+  LOperand* input = instr->value();
   Condition cc = masm()->CheckSmi(ToRegister(input));
   DeoptimizeIf(cc, instr->environment());
 }
 
 
 void LCodeGen::DoCheckInstanceType(LCheckInstanceType* instr) {
-  Register input = ToRegister(instr->InputAt(0));
+  Register input = ToRegister(instr->value());
 
   __ movq(kScratchRegister, FieldOperand(input, HeapObject::kMapOffset));
 
@@ -4444,7 +4582,7 @@ void LCodeGen::DoCheckMapCommon(Register reg,
 
 
 void LCodeGen::DoCheckMaps(LCheckMaps* instr) {
-  LOperand* input = instr->InputAt(0);
+  LOperand* input = instr->value();
   ASSERT(input->IsRegister());
   Register reg = ToRegister(input);
 
@@ -4464,8 +4602,7 @@ void LCodeGen::DoCheckMaps(LCheckMaps* instr) {
 void LCodeGen::DoClampDToUint8(LClampDToUint8* instr) {
   XMMRegister value_reg = ToDoubleRegister(instr->unclamped());
   Register result_reg = ToRegister(instr->result());
-  Register temp_reg = ToRegister(instr->TempAt(0));
-  __ ClampDoubleToUint8(value_reg, xmm0, result_reg, temp_reg);
+  __ ClampDoubleToUint8(value_reg, xmm0, result_reg);
 }
 
 
@@ -4479,8 +4616,7 @@ void LCodeGen::DoClampIToUint8(LClampIToUint8* instr) {
 void LCodeGen::DoClampTToUint8(LClampTToUint8* instr) {
   ASSERT(instr->unclamped()->Equals(instr->result()));
   Register input_reg = ToRegister(instr->unclamped());
-  Register temp_reg = ToRegister(instr->TempAt(0));
-  XMMRegister temp_xmm_reg = ToDoubleRegister(instr->TempAt(1));
+  XMMRegister temp_xmm_reg = ToDoubleRegister(instr->temp_xmm());
   Label is_smi, done, heap_number;
 
   __ JumpIfSmi(input_reg, &is_smi);
@@ -4500,7 +4636,7 @@ void LCodeGen::DoClampTToUint8(LClampTToUint8* instr) {
   // Heap number
   __ bind(&heap_number);
   __ movsd(xmm0, FieldOperand(input_reg, HeapNumber::kValueOffset));
-  __ ClampDoubleToUint8(xmm0, temp_xmm_reg, input_reg, temp_reg);
+  __ ClampDoubleToUint8(xmm0, temp_xmm_reg, input_reg);
   __ jmp(&done, Label::kNear);
 
   // smi
@@ -4513,7 +4649,8 @@ void LCodeGen::DoClampTToUint8(LClampTToUint8* instr) {
 
 
 void LCodeGen::DoCheckPrototypeMaps(LCheckPrototypeMaps* instr) {
-  Register reg = ToRegister(instr->TempAt(0));
+  ASSERT(instr->temp()->Equals(instr->result()));
+  Register reg = ToRegister(instr->temp());
 
   Handle<JSObject> holder = instr->holder();
   Handle<JSObject> current_prototype = instr->prototype();
@@ -4552,7 +4689,7 @@ void LCodeGen::DoAllocateObject(LAllocateObject* instr) {
       new(zone()) DeferredAllocateObject(this, instr);
 
   Register result = ToRegister(instr->result());
-  Register scratch = ToRegister(instr->TempAt(0));
+  Register scratch = ToRegister(instr->temp());
   Handle<JSFunction> constructor = instr->hydrogen()->constructor();
   Handle<Map> initial_map(constructor->initial_map());
   int instance_size = initial_map->instance_size();
@@ -4585,7 +4722,7 @@ void LCodeGen::DoAllocateObject(LAllocateObject* instr) {
   __ movq(map, FieldOperand(scratch, JSFunction::kPrototypeOrInitialMapOffset));
 
   if (FLAG_debug_code) {
-    __ AbortIfSmi(map);
+    __ AssertNotSmi(map);
     __ cmpb(FieldOperand(map, Map::kInstanceSizeOffset),
             Immediate(instance_size >> kPointerSizeLog2));
     __ Assert(equal, "Unexpected instance size");
@@ -4854,7 +4991,7 @@ void LCodeGen::DoObjectLiteral(LObjectLiteral* instr) {
 
 
 void LCodeGen::DoToFastProperties(LToFastProperties* instr) {
-  ASSERT(ToRegister(instr->InputAt(0)).is(rax));
+  ASSERT(ToRegister(instr->value()).is(rax));
   __ push(rax);
   CallRuntime(Runtime::kToFastProperties, 1, instr);
 }
@@ -4931,7 +5068,7 @@ void LCodeGen::DoFunctionLiteral(LFunctionLiteral* instr) {
 
 
 void LCodeGen::DoTypeof(LTypeof* instr) {
-  LOperand* input = instr->InputAt(0);
+  LOperand* input = instr->value();
   EmitPushTaggedOperand(input);
   CallRuntime(Runtime::kTypeof, 1, instr);
 }
@@ -4955,7 +5092,7 @@ void LCodeGen::EmitPushTaggedOperand(LOperand* operand) {
 
 
 void LCodeGen::DoTypeofIsAndBranch(LTypeofIsAndBranch* instr) {
-  Register input = ToRegister(instr->InputAt(0));
+  Register input = ToRegister(instr->value());
   int true_block = chunk_->LookupDestination(instr->true_block_id());
   int false_block = chunk_->LookupDestination(instr->false_block_id());
   Label* true_label = chunk_->GetAssemblyLabel(true_block);
@@ -5041,7 +5178,7 @@ Condition LCodeGen::EmitTypeofIs(Label* true_label,
 
 
 void LCodeGen::DoIsConstructCallAndBranch(LIsConstructCallAndBranch* instr) {
-  Register temp = ToRegister(instr->TempAt(0));
+  Register temp = ToRegister(instr->temp());
   int true_block = chunk_->LookupDestination(instr->true_block_id());
   int false_block = chunk_->LookupDestination(instr->false_block_id());
 
diff --git a/deps/v8/src/x64/lithium-codegen-x64.h b/deps/v8/src/x64/lithium-codegen-x64.h
index c12f4e8b24..e068f14b5a 100644
--- a/deps/v8/src/x64/lithium-codegen-x64.h
+++ b/deps/v8/src/x64/lithium-codegen-x64.h
@@ -117,7 +117,10 @@ class LCodeGen BASE_EMBEDDED {
   void DoGap(LGap* instr);
 
   // Emit frame translation commands for an environment.
-  void WriteTranslation(LEnvironment* environment, Translation* translation);
+  void WriteTranslation(LEnvironment* environment,
+                        Translation* translation,
+                        int* arguments_index,
+                        int* arguments_count);
 
   // Declare methods that deal with the individual node types.
 #define DECLARE_DO(type) void Do##type(L##type* node);
@@ -225,7 +228,9 @@ class LCodeGen BASE_EMBEDDED {
   void AddToTranslation(Translation* translation,
                         LOperand* op,
                         bool is_tagged,
-                        bool is_uint32);
+                        bool is_uint32,
+                        int arguments_index,
+                        int arguments_count);
   void PopulateDeoptimizationData(Handle<Code> code);
   int DefineDeoptimizationLiteral(Handle<Object> literal);
 
@@ -330,6 +335,12 @@ class LCodeGen BASE_EMBEDDED {
   };
 
   void EnsureSpaceForLazyDeopt(int space_needed);
+  void DoLoadKeyedExternalArray(LLoadKeyed* instr);
+  void DoLoadKeyedFixedDoubleArray(LLoadKeyed* instr);
+  void DoLoadKeyedFixedArray(LLoadKeyed* instr);
+  void DoStoreKeyedExternalArray(LStoreKeyed* instr);
+  void DoStoreKeyedFixedDoubleArray(LStoreKeyed* instr);
+  void DoStoreKeyedFixedArray(LStoreKeyed* instr);
 
   Zone* zone_;
   LPlatformChunk* const chunk_;
diff --git a/deps/v8/src/x64/lithium-x64.cc b/deps/v8/src/x64/lithium-x64.cc
index bee1854448..81228cef8c 100644
--- a/deps/v8/src/x64/lithium-x64.cc
+++ b/deps/v8/src/x64/lithium-x64.cc
@@ -179,6 +179,7 @@ const char* LArithmeticT::Mnemonic() const {
     case Token::BIT_AND: return "bit-and-t";
     case Token::BIT_OR: return "bit-or-t";
     case Token::BIT_XOR: return "bit-xor-t";
+    case Token::ROR: return "ror-t";
     case Token::SHL: return "sal-t";
     case Token::SAR: return "sar-t";
     case Token::SHR: return "shr-t";
@@ -196,22 +197,22 @@ void LGoto::PrintDataTo(StringStream* stream) {
 
 void LBranch::PrintDataTo(StringStream* stream) {
   stream->Add("B%d | B%d on ", true_block_id(), false_block_id());
-  InputAt(0)->PrintTo(stream);
+  value()->PrintTo(stream);
 }
 
 
 void LCmpIDAndBranch::PrintDataTo(StringStream* stream) {
   stream->Add("if ");
-  InputAt(0)->PrintTo(stream);
+  left()->PrintTo(stream);
   stream->Add(" %s ", Token::String(op()));
-  InputAt(1)->PrintTo(stream);
+  right()->PrintTo(stream);
   stream->Add(" then B%d else B%d", true_block_id(), false_block_id());
 }
 
 
 void LIsNilAndBranch::PrintDataTo(StringStream* stream) {
   stream->Add("if ");
-  InputAt(0)->PrintTo(stream);
+  value()->PrintTo(stream);
   stream->Add(kind() == kStrictEquality ? " === " : " == ");
   stream->Add(nil() == kNullValue ? "null" : "undefined");
   stream->Add(" then B%d else B%d", true_block_id(), false_block_id());
@@ -220,57 +221,57 @@ void LIsNilAndBranch::PrintDataTo(StringStream* stream) {
 
 void LIsObjectAndBranch::PrintDataTo(StringStream* stream) {
   stream->Add("if is_object(");
-  InputAt(0)->PrintTo(stream);
+  value()->PrintTo(stream);
   stream->Add(") then B%d else B%d", true_block_id(), false_block_id());
 }
 
 
 void LIsStringAndBranch::PrintDataTo(StringStream* stream) {
   stream->Add("if is_string(");
-  InputAt(0)->PrintTo(stream);
+  value()->PrintTo(stream);
   stream->Add(") then B%d else B%d", true_block_id(), false_block_id());
 }
 
 
 void LIsSmiAndBranch::PrintDataTo(StringStream* stream) {
   stream->Add("if is_smi(");
-  InputAt(0)->PrintTo(stream);
+  value()->PrintTo(stream);
   stream->Add(") then B%d else B%d", true_block_id(), false_block_id());
 }
 
 
 void LIsUndetectableAndBranch::PrintDataTo(StringStream* stream) {
   stream->Add("if is_undetectable(");
-  InputAt(0)->PrintTo(stream);
+  value()->PrintTo(stream);
   stream->Add(") then B%d else B%d", true_block_id(), false_block_id());
 }
 
 
 void LStringCompareAndBranch::PrintDataTo(StringStream* stream) {
   stream->Add("if string_compare(");
-  InputAt(0)->PrintTo(stream);
-  InputAt(1)->PrintTo(stream);
+  left()->PrintTo(stream);
+  right()->PrintTo(stream);
   stream->Add(") then B%d else B%d", true_block_id(), false_block_id());
 }
 
 
 void LHasInstanceTypeAndBranch::PrintDataTo(StringStream* stream) {
   stream->Add("if has_instance_type(");
-  InputAt(0)->PrintTo(stream);
+  value()->PrintTo(stream);
   stream->Add(") then B%d else B%d", true_block_id(), false_block_id());
 }
 
 
 void LHasCachedArrayIndexAndBranch::PrintDataTo(StringStream* stream) {
   stream->Add("if has_cached_array_index(");
-  InputAt(0)->PrintTo(stream);
+  value()->PrintTo(stream);
   stream->Add(") then B%d else B%d", true_block_id(), false_block_id());
 }
 
 
 void LClassOfTestAndBranch::PrintDataTo(StringStream* stream) {
   stream->Add("if class_of_test(");
-  InputAt(0)->PrintTo(stream);
+  value()->PrintTo(stream);
   stream->Add(", \"%o\") then B%d else B%d",
               *hydrogen()->class_name(),
               true_block_id(),
@@ -280,7 +281,7 @@ void LClassOfTestAndBranch::PrintDataTo(StringStream* stream) {
 
 void LTypeofIsAndBranch::PrintDataTo(StringStream* stream) {
   stream->Add("if typeof ");
-  InputAt(0)->PrintTo(stream);
+  value()->PrintTo(stream);
   stream->Add(" == \"%s\" then B%d else B%d",
               *hydrogen()->type_literal()->ToCString(),
               true_block_id(), false_block_id());
@@ -294,26 +295,31 @@ void LCallConstantFunction::PrintDataTo(StringStream* stream) {
 
 void LUnaryMathOperation::PrintDataTo(StringStream* stream) {
   stream->Add("/%s ", hydrogen()->OpName());
-  InputAt(0)->PrintTo(stream);
+  value()->PrintTo(stream);
+}
+
+
+void LMathExp::PrintDataTo(StringStream* stream) {
+  value()->PrintTo(stream);
 }
 
 
 void LLoadContextSlot::PrintDataTo(StringStream* stream) {
-  InputAt(0)->PrintTo(stream);
+  context()->PrintTo(stream);
   stream->Add("[%d]", slot_index());
 }
 
 
 void LStoreContextSlot::PrintDataTo(StringStream* stream) {
-  InputAt(0)->PrintTo(stream);
+  context()->PrintTo(stream);
   stream->Add("[%d] <- ", slot_index());
-  InputAt(1)->PrintTo(stream);
+  value()->PrintTo(stream);
 }
 
 
 void LInvokeFunction::PrintDataTo(StringStream* stream) {
   stream->Add("= ");
-  InputAt(0)->PrintTo(stream);
+  function()->PrintTo(stream);
   stream->Add(" #%d / ", arity());
 }
 
@@ -342,7 +348,7 @@ void LCallKnownGlobal::PrintDataTo(StringStream* stream) {
 
 void LCallNew::PrintDataTo(StringStream* stream) {
   stream->Add("= ");
-  InputAt(0)->PrintTo(stream);
+  constructor()->PrintTo(stream);
   stream->Add(" #%d / ", arity());
 }
 
@@ -394,20 +400,27 @@ void LStoreNamedGeneric::PrintDataTo(StringStream* stream) {
 }
 
 
-void LStoreKeyedFastElement::PrintDataTo(StringStream* stream) {
-  object()->PrintTo(stream);
+void LLoadKeyed::PrintDataTo(StringStream* stream) {
+  elements()->PrintTo(stream);
   stream->Add("[");
   key()->PrintTo(stream);
-  stream->Add("] <- ");
-  value()->PrintTo(stream);
+  if (hydrogen()->IsDehoisted()) {
+    stream->Add(" + %d]", additional_index());
+  } else {
+    stream->Add("]");
+  }
 }
 
 
-void LStoreKeyedFastDoubleElement::PrintDataTo(StringStream* stream) {
+void LStoreKeyed::PrintDataTo(StringStream* stream) {
   elements()->PrintTo(stream);
   stream->Add("[");
   key()->PrintTo(stream);
-  stream->Add("] <- ");
+  if (hydrogen()->IsDehoisted()) {
+    stream->Add(" + %d] <-", additional_index());
+  } else {
+    stream->Add("] <- ");
+  }
   value()->PrintTo(stream);
 }
 
@@ -865,6 +878,7 @@ LEnvironment* LChunkBuilder::CreateEnvironment(
       argument_count_,
       value_count,
       outer,
+      hydrogen_env->entry(),
       zone());
   int argument_index = *argument_index_accumulator;
   for (int i = 0; i < value_count; ++i) {
@@ -1037,6 +1051,14 @@ LInstruction* LChunkBuilder::DoUnaryMathOperation(HUnaryMathOperation* instr) {
     LOperand* input = UseFixedDouble(instr->value(), xmm1);
     LUnaryMathOperation* result = new(zone()) LUnaryMathOperation(input);
     return MarkAsCall(DefineFixedDouble(result, xmm1), instr);
+  } else if (op == kMathExp) {
+    ASSERT(instr->representation().IsDouble());
+    ASSERT(instr->value()->representation().IsDouble());
+    LOperand* value = UseTempRegister(instr->value());
+    LOperand* temp1 = TempRegister();
+    LOperand* temp2 = TempRegister();
+    LMathExp* result = new(zone()) LMathExp(value, temp1, temp2);
+    return DefineAsRegister(result);
   } else {
     LOperand* input = UseRegisterAtStart(instr->value());
     LUnaryMathOperation* result = new(zone()) LUnaryMathOperation(input);
@@ -1108,6 +1130,11 @@ LInstruction* LChunkBuilder::DoCallRuntime(HCallRuntime* instr) {
 }
 
 
+LInstruction* LChunkBuilder::DoRor(HRor* instr) {
+  return DoShift(Token::ROR, instr);
+}
+
+
 LInstruction* LChunkBuilder::DoShr(HShr* instr) {
   return DoShift(Token::SHR, instr);
 }
@@ -1158,6 +1185,13 @@ LInstruction* LChunkBuilder::DoDiv(HDiv* instr) {
   if (instr->representation().IsDouble()) {
     return DoArithmeticD(Token::DIV, instr);
   } else if (instr->representation().IsInteger32()) {
+    if (instr->HasPowerOf2Divisor()) {
+      ASSERT(!instr->CheckFlag(HValue::kCanBeDivByZero));
+      LOperand* value = UseRegisterAtStart(instr->left());
+      LDivI* div =
+          new(zone()) LDivI(value, UseOrConstant(instr->right()), NULL);
+      return AssignEnvironment(DefineSameAsFirst(div));
+    }
     // The temporary operand is necessary to ensure that right is not allocated
     // into rdx.
     LOperand* temp = FixedTemp(rdx);
@@ -1391,7 +1425,7 @@ LInstruction* LChunkBuilder::DoCompareGeneric(HCompareGeneric* instr) {
 
 LInstruction* LChunkBuilder::DoCompareIDAndBranch(
     HCompareIDAndBranch* instr) {
-  Representation r = instr->GetInputRepresentation();
+  Representation r = instr->representation();
   if (r.IsInteger32()) {
     ASSERT(instr->left()->representation().IsInteger32());
     ASSERT(instr->right()->representation().IsInteger32());
@@ -1554,6 +1588,17 @@ LInstruction* LChunkBuilder::DoDateField(HDateField* instr) {
 }
 
 
+LInstruction* LChunkBuilder::DoSeqStringSetChar(HSeqStringSetChar* instr) {
+  LOperand* string = UseRegister(instr->string());
+  LOperand* index = UseRegister(instr->index());
+  ASSERT(rcx.is_byte_register());
+  LOperand* value = UseFixed(instr->value(), rcx);
+  LSeqStringSetChar* result =
+      new(zone()) LSeqStringSetChar(instr->encoding(), string, index, value);
+  return DefineSameAsFirst(result);
+}
+
+
 LInstruction* LChunkBuilder::DoBoundsCheck(HBoundsCheck* instr) {
   LOperand* value = UseRegisterOrConstantAtStart(instr->index());
   LOperand* length = Use(instr->length());
@@ -1666,9 +1711,9 @@ LInstruction* LChunkBuilder::DoCheckInstanceType(HCheckInstanceType* instr) {
 
 
 LInstruction* LChunkBuilder::DoCheckPrototypeMaps(HCheckPrototypeMaps* instr) {
-  LOperand* temp = TempRegister();
+  LUnallocated* temp = TempRegister();
   LCheckPrototypeMaps* result = new(zone()) LCheckPrototypeMaps(temp);
-  return AssignEnvironment(result);
+  return AssignEnvironment(Define(result, temp));
 }
 
 
@@ -1696,8 +1741,7 @@ LInstruction* LChunkBuilder::DoClampToUint8(HClampToUint8* instr) {
   Representation input_rep = value->representation();
   LOperand* reg = UseRegister(value);
   if (input_rep.IsDouble()) {
-    return DefineAsRegister(new(zone()) LClampDToUint8(reg,
-                                               TempRegister()));
+    return DefineAsRegister(new(zone()) LClampDToUint8(reg));
   } else if (input_rep.IsInteger32()) {
     return DefineSameAsFirst(new(zone()) LClampIToUint8(reg));
   } else {
@@ -1705,7 +1749,6 @@ LInstruction* LChunkBuilder::DoClampToUint8(HClampToUint8* instr) {
     // Register allocator doesn't (yet) support allocation of double
     // temps. Reserve xmm1 explicitly.
     LClampTToUint8* result = new(zone()) LClampTToUint8(reg,
-                                                        TempRegister(),
                                                         FixedTemp(xmm1));
     return AssignEnvironment(DefineSameAsFirst(result));
   }
@@ -1844,63 +1887,37 @@ LInstruction* LChunkBuilder::DoLoadExternalArrayPointer(
 }
 
 
-LInstruction* LChunkBuilder::DoLoadKeyedFastElement(
-    HLoadKeyedFastElement* instr) {
-  ASSERT(instr->representation().IsTagged());
+LInstruction* LChunkBuilder::DoLoadKeyed(HLoadKeyed* instr) {
   ASSERT(instr->key()->representation().IsInteger32() ||
          instr->key()->representation().IsTagged());
-  LOperand* obj = UseRegisterAtStart(instr->object());
-  bool clobbers_key = instr->key()->representation().IsTagged();
-  LOperand* key = clobbers_key
-      ? UseTempRegister(instr->key())
-      : UseRegisterOrConstantAtStart(instr->key());
-  LLoadKeyedFastElement* result =
-      new(zone()) LLoadKeyedFastElement(obj, key);
-  if (instr->RequiresHoleCheck()) AssignEnvironment(result);
-  return DefineAsRegister(result);
-}
-
-
-LInstruction* LChunkBuilder::DoLoadKeyedFastDoubleElement(
-    HLoadKeyedFastDoubleElement* instr) {
-  ASSERT(instr->representation().IsDouble());
-  ASSERT(instr->key()->representation().IsInteger32() ||
-         instr->key()->representation().IsTagged());
-  LOperand* elements = UseRegisterAtStart(instr->elements());
+  ElementsKind elements_kind = instr->elements_kind();
   bool clobbers_key = instr->key()->representation().IsTagged();
   LOperand* key = clobbers_key
       ? UseTempRegister(instr->key())
       : UseRegisterOrConstantAtStart(instr->key());
-  LLoadKeyedFastDoubleElement* result =
-      new(zone()) LLoadKeyedFastDoubleElement(elements, key);
-  return AssignEnvironment(DefineAsRegister(result));
-}
+  LLoadKeyed* result = NULL;
 
+  if (!instr->is_external()) {
+    LOperand* obj = UseRegisterAtStart(instr->elements());
+    result = new(zone()) LLoadKeyed(obj, key);
+  } else {
+    ASSERT(
+        (instr->representation().IsInteger32() &&
+         (elements_kind != EXTERNAL_FLOAT_ELEMENTS) &&
+         (elements_kind != EXTERNAL_DOUBLE_ELEMENTS)) ||
+        (instr->representation().IsDouble() &&
+         ((elements_kind == EXTERNAL_FLOAT_ELEMENTS) ||
+          (elements_kind == EXTERNAL_DOUBLE_ELEMENTS))));
+    LOperand* external_pointer = UseRegister(instr->elements());
+    result = new(zone()) LLoadKeyed(external_pointer, key);
+  }
 
-LInstruction* LChunkBuilder::DoLoadKeyedSpecializedArrayElement(
-    HLoadKeyedSpecializedArrayElement* instr) {
-  ElementsKind elements_kind = instr->elements_kind();
-  ASSERT(
-      (instr->representation().IsInteger32() &&
-       (elements_kind != EXTERNAL_FLOAT_ELEMENTS) &&
-       (elements_kind != EXTERNAL_DOUBLE_ELEMENTS)) ||
-      (instr->representation().IsDouble() &&
-       ((elements_kind == EXTERNAL_FLOAT_ELEMENTS) ||
-       (elements_kind == EXTERNAL_DOUBLE_ELEMENTS))));
-  ASSERT(instr->key()->representation().IsInteger32() ||
-         instr->key()->representation().IsTagged());
-  LOperand* external_pointer = UseRegister(instr->external_pointer());
-  bool clobbers_key = instr->key()->representation().IsTagged();
-  LOperand* key = clobbers_key
-      ? UseTempRegister(instr->key())
-      : UseRegisterOrConstantAtStart(instr->key());
-  LLoadKeyedSpecializedArrayElement* result =
-      new(zone()) LLoadKeyedSpecializedArrayElement(external_pointer, key);
-  LInstruction* load_instr = DefineAsRegister(result);
+  DefineAsRegister(result);
+  bool can_deoptimize = instr->RequiresHoleCheck() ||
+      (elements_kind == EXTERNAL_UNSIGNED_INT_ELEMENTS);
   // An unsigned int array load might overflow and cause a deopt, make sure it
   // has an environment.
-  return (elements_kind == EXTERNAL_UNSIGNED_INT_ELEMENTS) ?
-      AssignEnvironment(load_instr) : load_instr;
+  return can_deoptimize ? AssignEnvironment(result) : result;
 }
 
 
@@ -1913,71 +1930,52 @@ LInstruction* LChunkBuilder::DoLoadKeyedGeneric(HLoadKeyedGeneric* instr) {
 }
 
 
-LInstruction* LChunkBuilder::DoStoreKeyedFastElement(
-    HStoreKeyedFastElement* instr) {
-  bool needs_write_barrier = instr->NeedsWriteBarrier();
-  ASSERT(instr->value()->representation().IsTagged());
-  ASSERT(instr->object()->representation().IsTagged());
-  ASSERT(instr->key()->representation().IsInteger32() ||
-         instr->key()->representation().IsTagged());
-
-  LOperand* obj = UseTempRegister(instr->object());
-  LOperand* val = needs_write_barrier
-      ? UseTempRegister(instr->value())
-      : UseRegisterAtStart(instr->value());
-  bool clobbers_key = needs_write_barrier ||
-      instr->key()->representation().IsTagged();
-  LOperand* key = clobbers_key
-      ? UseTempRegister(instr->key())
-      : UseRegisterOrConstantAtStart(instr->key());
-  return new(zone()) LStoreKeyedFastElement(obj, key, val);
-}
-
-
-LInstruction* LChunkBuilder::DoStoreKeyedFastDoubleElement(
-    HStoreKeyedFastDoubleElement* instr) {
-  ASSERT(instr->value()->representation().IsDouble());
-  ASSERT(instr->elements()->representation().IsTagged());
-  ASSERT(instr->key()->representation().IsInteger32() ||
-         instr->key()->representation().IsTagged());
-
-  LOperand* elements = UseRegisterAtStart(instr->elements());
-  LOperand* val = UseTempRegister(instr->value());
+LInstruction* LChunkBuilder::DoStoreKeyed(HStoreKeyed* instr) {
+  ElementsKind elements_kind = instr->elements_kind();
   bool clobbers_key = instr->key()->representation().IsTagged();
-  LOperand* key = clobbers_key
-      ? UseTempRegister(instr->key())
-      : UseRegisterOrConstantAtStart(instr->key());
-  return new(zone()) LStoreKeyedFastDoubleElement(elements, key, val);
-}
 
+  if (!instr->is_external()) {
+    ASSERT(instr->elements()->representation().IsTagged());
+    bool needs_write_barrier = instr->NeedsWriteBarrier();
+    LOperand* object = NULL;
+    LOperand* key = NULL;
+    LOperand* val = NULL;
+
+    if (instr->value()->representation().IsDouble()) {
+      object = UseRegisterAtStart(instr->elements());
+      val = UseTempRegister(instr->value());
+      key = clobbers_key ? UseTempRegister(instr->key())
+          : UseRegisterOrConstantAtStart(instr->key());
+    } else {
+      ASSERT(instr->value()->representation().IsTagged());
+      object = UseTempRegister(instr->elements());
+      val = needs_write_barrier ? UseTempRegister(instr->value())
+          : UseRegisterAtStart(instr->value());
+      key = (clobbers_key || needs_write_barrier)
+          ? UseTempRegister(instr->key())
+          : UseRegisterOrConstantAtStart(instr->key());
+    }
+
+    return new(zone()) LStoreKeyed(object, key, val);
+  }
 
-LInstruction* LChunkBuilder::DoStoreKeyedSpecializedArrayElement(
-    HStoreKeyedSpecializedArrayElement* instr) {
-  ElementsKind elements_kind = instr->elements_kind();
   ASSERT(
       (instr->value()->representation().IsInteger32() &&
        (elements_kind != EXTERNAL_FLOAT_ELEMENTS) &&
        (elements_kind != EXTERNAL_DOUBLE_ELEMENTS)) ||
       (instr->value()->representation().IsDouble() &&
        ((elements_kind == EXTERNAL_FLOAT_ELEMENTS) ||
-       (elements_kind == EXTERNAL_DOUBLE_ELEMENTS))));
-  ASSERT(instr->external_pointer()->representation().IsExternal());
-  ASSERT(instr->key()->representation().IsInteger32() ||
-         instr->key()->representation().IsTagged());
-
-  LOperand* external_pointer = UseRegister(instr->external_pointer());
+        (elements_kind == EXTERNAL_DOUBLE_ELEMENTS))));
+  ASSERT(instr->elements()->representation().IsExternal());
   bool val_is_temp_register =
       elements_kind == EXTERNAL_PIXEL_ELEMENTS ||
       elements_kind == EXTERNAL_FLOAT_ELEMENTS;
-  LOperand* val = val_is_temp_register
-      ? UseTempRegister(instr->value())
+  LOperand* val = val_is_temp_register ? UseTempRegister(instr->value())
       : UseRegister(instr->value());
-  bool clobbers_key = instr->key()->representation().IsTagged();
-  LOperand* key = clobbers_key
-      ? UseTempRegister(instr->key())
+  LOperand* key = clobbers_key ? UseTempRegister(instr->key())
       : UseRegisterOrConstantAtStart(instr->key());
-  return new(zone()) LStoreKeyedSpecializedArrayElement(external_pointer,
-                                                        key, val);
+  LOperand* external_pointer = UseRegister(instr->elements());
+  return new(zone()) LStoreKeyed(external_pointer, key, val);
 }
 
 
@@ -2127,6 +2125,7 @@ LInstruction* LChunkBuilder::DoDeleteProperty(HDeleteProperty* instr) {
 
 
 LInstruction* LChunkBuilder::DoOsrEntry(HOsrEntry* instr) {
+  ASSERT(argument_count_ == 0);
   allocator_->MarkAsOsrEntry();
   current_block_->last_environment()->set_ast_id(instr->ast_id());
   return AssignEnvironment(new(zone()) LOsrEntry);
@@ -2165,12 +2164,10 @@ LInstruction* LChunkBuilder::DoArgumentsObject(HArgumentsObject* instr) {
 
 
 LInstruction* LChunkBuilder::DoAccessArgumentsAt(HAccessArgumentsAt* instr) {
-  LOperand* arguments = UseRegister(instr->arguments());
+  LOperand* args = UseRegister(instr->arguments());
   LOperand* length = UseTempRegister(instr->length());
   LOperand* index = Use(instr->index());
-  LAccessArgumentsAt* result =
-      new(zone()) LAccessArgumentsAt(arguments, length, index);
-  return AssignEnvironment(DefineAsRegister(result));
+  return DefineAsRegister(new(zone()) LAccessArgumentsAt(args, length, index));
 }
 
 
@@ -2205,7 +2202,7 @@ LInstruction* LChunkBuilder::DoSimulate(HSimulate* instr) {
   env->set_ast_id(instr->ast_id());
 
   env->Drop(instr->pop_count());
-  for (int i = 0; i < instr->values()->length(); ++i) {
+  for (int i = instr->values()->length() - 1; i >= 0; --i) {
     HValue* value = instr->values()->at(i);
     if (instr->HasAssignedIndexAt(i)) {
       env->Bind(instr->GetAssignedIndexAt(i), value);
@@ -2254,6 +2251,7 @@ LInstruction* LChunkBuilder::DoEnterInlined(HEnterInlined* instr) {
   if (instr->arguments_var() != NULL) {
     inner->Bind(instr->arguments_var(), graph()->GetArgumentsObject());
   }
+  inner->set_entry(instr);
   current_block_->UpdateEnvironment(inner);
   chunk_->AddInlinedClosure(instr->closure());
   return NULL;
@@ -2265,7 +2263,7 @@ LInstruction* LChunkBuilder::DoLeaveInlined(HLeaveInlined* instr) {
 
   HEnvironment* env = current_block_->last_environment();
 
-  if (instr->arguments_pushed()) {
+  if (env->entry()->arguments_pushed()) {
     int argument_count = env->arguments_environment()->parameter_count();
     pop = new(zone()) LDrop(argument_count);
     argument_count_ -= argument_count;
diff --git a/deps/v8/src/x64/lithium-x64.h b/deps/v8/src/x64/lithium-x64.h
index 84d05c051a..4a909a1f2e 100644
--- a/deps/v8/src/x64/lithium-x64.h
+++ b/deps/v8/src/x64/lithium-x64.h
@@ -126,13 +126,12 @@ class LCodeGen;
   V(LoadFunctionPrototype)                      \
   V(LoadGlobalCell)                             \
   V(LoadGlobalGeneric)                          \
-  V(LoadKeyedFastDoubleElement)                 \
-  V(LoadKeyedFastElement)                       \
+  V(LoadKeyed)                                  \
   V(LoadKeyedGeneric)                           \
-  V(LoadKeyedSpecializedArrayElement)           \
   V(LoadNamedField)                             \
   V(LoadNamedFieldPolymorphic)                  \
   V(LoadNamedGeneric)                           \
+  V(MathExp)                                    \
   V(MathFloorOfDiv)                             \
   V(MathMinMax)                                 \
   V(ModI)                                       \
@@ -150,6 +149,7 @@ class LCodeGen;
   V(Random)                                     \
   V(RegExpLiteral)                              \
   V(Return)                                     \
+  V(SeqStringSetChar)                           \
   V(ShiftI)                                     \
   V(SmiTag)                                     \
   V(SmiUntag)                                   \
@@ -157,10 +157,8 @@ class LCodeGen;
   V(StoreContextSlot)                           \
   V(StoreGlobalCell)                            \
   V(StoreGlobalGeneric)                         \
-  V(StoreKeyedFastDoubleElement)                \
-  V(StoreKeyedFastElement)                      \
+  V(StoreKeyed)                                 \
   V(StoreKeyedGeneric)                          \
-  V(StoreKeyedSpecializedArrayElement)          \
   V(StoreNamedField)                            \
   V(StoreNamedGeneric)                          \
   V(StringAdd)                                  \
@@ -262,9 +260,6 @@ class LInstruction: public ZoneObject {
   virtual bool HasResult() const = 0;
   virtual LOperand* result() = 0;
 
-  virtual int TempCount() = 0;
-  virtual LOperand* TempAt(int i) = 0;
-
   LOperand* FirstInput() { return InputAt(0); }
   LOperand* Output() { return HasResult() ? result() : NULL; }
 
@@ -278,6 +273,10 @@ class LInstruction: public ZoneObject {
   virtual int InputCount() = 0;
   virtual LOperand* InputAt(int i) = 0;
 
+  friend class TempIterator;
+  virtual int TempCount() = 0;
+  virtual LOperand* TempAt(int i) = 0;
+
   LEnvironment* environment_;
   SetOncePointer<LPointerMap> pointer_map_;
   HValue* hydrogen_value_;
@@ -297,18 +296,18 @@ class LTemplateInstruction: public LInstruction {
   void set_result(LOperand* operand) { results_[0] = operand; }
   LOperand* result() { return results_[0]; }
 
-  LOperand* InputAt(int i) { return inputs_[i]; }
-
-  int TempCount() { return T; }
-  LOperand* TempAt(int i) { return temps_[i]; }
-
  protected:
   EmbeddedContainer<LOperand*, R> results_;
   EmbeddedContainer<LOperand*, I> inputs_;
   EmbeddedContainer<LOperand*, T> temps_;
 
  private:
+  // Iterator support.
   virtual int InputCount() { return I; }
+  virtual LOperand* InputAt(int i) { return inputs_[i]; }
+
+  virtual int TempCount() { return T; }
+  virtual LOperand* TempAt(int i) { return temps_[i]; }
 };
 
 
@@ -475,10 +474,10 @@ class LWrapReceiver: public LTemplateInstruction<1, 2, 0> {
     inputs_[1] = function;
   }
 
-  DECLARE_CONCRETE_INSTRUCTION(WrapReceiver, "wrap-receiver")
-
   LOperand* receiver() { return inputs_[0]; }
   LOperand* function() { return inputs_[1]; }
+
+  DECLARE_CONCRETE_INSTRUCTION(WrapReceiver, "wrap-receiver")
 };
 
 
@@ -494,12 +493,12 @@ class LApplyArguments: public LTemplateInstruction<1, 4, 0> {
     inputs_[3] = elements;
   }
 
-  DECLARE_CONCRETE_INSTRUCTION(ApplyArguments, "apply-arguments")
-
   LOperand* function() { return inputs_[0]; }
   LOperand* receiver() { return inputs_[1]; }
   LOperand* length() { return inputs_[2]; }
   LOperand* elements() { return inputs_[3]; }
+
+  DECLARE_CONCRETE_INSTRUCTION(ApplyArguments, "apply-arguments")
 };
 
 
@@ -511,12 +510,12 @@ class LAccessArgumentsAt: public LTemplateInstruction<1, 3, 0> {
     inputs_[2] = index;
   }
 
-  DECLARE_CONCRETE_INSTRUCTION(AccessArgumentsAt, "access-arguments-at")
-
   LOperand* arguments() { return inputs_[0]; }
   LOperand* length() { return inputs_[1]; }
   LOperand* index() { return inputs_[2]; }
 
+  DECLARE_CONCRETE_INSTRUCTION(AccessArgumentsAt, "access-arguments-at")
+
   virtual void PrintDataTo(StringStream* stream);
 };
 
@@ -527,6 +526,8 @@ class LArgumentsLength: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = elements;
   }
 
+  LOperand* elements() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(ArgumentsLength, "arguments-length")
 };
 
@@ -546,6 +547,10 @@ class LModI: public LTemplateInstruction<1, 2, 1> {
     temps_[0] = temp;
   }
 
+  LOperand* left() { return inputs_[0]; }
+  LOperand* right() { return inputs_[1]; }
+  LOperand* temp() { return temps_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(ModI, "mod-i")
   DECLARE_HYDROGEN_ACCESSOR(Mod)
 };
@@ -559,6 +564,10 @@ class LDivI: public LTemplateInstruction<1, 2, 1> {
     temps_[0] = temp;
   }
 
+  LOperand* left() { return inputs_[0]; }
+  LOperand* right() { return inputs_[1]; }
+  LOperand* temp() { return temps_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(DivI, "div-i")
   DECLARE_HYDROGEN_ACCESSOR(Div)
 };
@@ -574,6 +583,10 @@ class LMathFloorOfDiv: public LTemplateInstruction<1, 2, 1> {
     temps_[0] = temp;
   }
 
+  LOperand* left() { return inputs_[0]; }
+  LOperand* right() { return inputs_[1]; }
+  LOperand* temp() { return temps_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(MathFloorOfDiv, "math-floor-of-div")
   DECLARE_HYDROGEN_ACCESSOR(MathFloorOfDiv)
 };
@@ -586,6 +599,9 @@ class LMulI: public LTemplateInstruction<1, 2, 0> {
     inputs_[1] = right;
   }
 
+  LOperand* left() { return inputs_[0]; }
+  LOperand* right() { return inputs_[1]; }
+
   DECLARE_CONCRETE_INSTRUCTION(MulI, "mul-i")
   DECLARE_HYDROGEN_ACCESSOR(Mul)
 };
@@ -598,12 +614,15 @@ class LCmpIDAndBranch: public LControlInstruction<2, 0> {
     inputs_[1] = right;
   }
 
+  LOperand* left() { return inputs_[0]; }
+  LOperand* right() { return inputs_[1]; }
+
   DECLARE_CONCRETE_INSTRUCTION(CmpIDAndBranch, "cmp-id-and-branch")
   DECLARE_HYDROGEN_ACCESSOR(CompareIDAndBranch)
 
   Token::Value op() const { return hydrogen()->token(); }
   bool is_double() const {
-    return hydrogen()->GetInputRepresentation().IsDouble();
+    return hydrogen()->representation().IsDouble();
   }
 
   virtual void PrintDataTo(StringStream* stream);
@@ -616,6 +635,8 @@ class LUnaryMathOperation: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(UnaryMathOperation, "unary-math-operation")
   DECLARE_HYDROGEN_ACCESSOR(UnaryMathOperation)
 
@@ -624,6 +645,25 @@ class LUnaryMathOperation: public LTemplateInstruction<1, 1, 0> {
 };
 
 
+class LMathExp: public LTemplateInstruction<1, 1, 2> {
+ public:
+  LMathExp(LOperand* value, LOperand* temp1, LOperand* temp2) {
+    inputs_[0] = value;
+    temps_[0] = temp1;
+    temps_[1] = temp2;
+    ExternalReference::InitializeMathExpData();
+  }
+
+  LOperand* value() { return inputs_[0]; }
+  LOperand* temp1() { return temps_[0]; }
+  LOperand* temp2() { return temps_[1]; }
+
+  DECLARE_CONCRETE_INSTRUCTION(MathExp, "math-exp")
+
+  virtual void PrintDataTo(StringStream* stream);
+};
+
+
 class LCmpObjectEqAndBranch: public LControlInstruction<2, 0> {
  public:
   LCmpObjectEqAndBranch(LOperand* left, LOperand* right) {
@@ -631,6 +671,9 @@ class LCmpObjectEqAndBranch: public LControlInstruction<2, 0> {
     inputs_[1] = right;
   }
 
+  LOperand* left() { return inputs_[0]; }
+  LOperand* right() { return inputs_[1]; }
+
   DECLARE_CONCRETE_INSTRUCTION(CmpObjectEqAndBranch,
                                "cmp-object-eq-and-branch")
 };
@@ -642,6 +685,8 @@ class LCmpConstantEqAndBranch: public LControlInstruction<1, 0> {
     inputs_[0] = left;
   }
 
+  LOperand* left() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(CmpConstantEqAndBranch,
                                "cmp-constant-eq-and-branch")
   DECLARE_HYDROGEN_ACCESSOR(CompareConstantEqAndBranch)
@@ -655,6 +700,9 @@ class LIsNilAndBranch: public LControlInstruction<1, 1> {
     temps_[0] = temp;
   }
 
+  LOperand* value() { return inputs_[0]; }
+  LOperand* temp() { return temps_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(IsNilAndBranch, "is-nil-and-branch")
   DECLARE_HYDROGEN_ACCESSOR(IsNilAndBranch)
 
@@ -671,6 +719,8 @@ class LIsObjectAndBranch: public LControlInstruction<1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(IsObjectAndBranch, "is-object-and-branch")
   DECLARE_HYDROGEN_ACCESSOR(IsObjectAndBranch)
 
@@ -685,6 +735,9 @@ class LIsStringAndBranch: public LControlInstruction<1, 1> {
     temps_[0] = temp;
   }
 
+  LOperand* value() { return inputs_[0]; }
+  LOperand* temp() { return temps_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(IsStringAndBranch, "is-string-and-branch")
   DECLARE_HYDROGEN_ACCESSOR(IsStringAndBranch)
 
@@ -698,6 +751,8 @@ class LIsSmiAndBranch: public LControlInstruction<1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(IsSmiAndBranch, "is-smi-and-branch")
   DECLARE_HYDROGEN_ACCESSOR(IsSmiAndBranch)
 
@@ -712,6 +767,9 @@ class LIsUndetectableAndBranch: public LControlInstruction<1, 1> {
     temps_[0] = temp;
   }
 
+  LOperand* value() { return inputs_[0]; }
+  LOperand* temp() { return temps_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(IsUndetectableAndBranch,
                                "is-undetectable-and-branch")
   DECLARE_HYDROGEN_ACCESSOR(IsUndetectableAndBranch)
@@ -727,6 +785,9 @@ class LStringCompareAndBranch: public LControlInstruction<2, 0> {
     inputs_[1] = right;
   }
 
+  LOperand* left() { return inputs_[0]; }
+  LOperand* right() { return inputs_[1]; }
+
   DECLARE_CONCRETE_INSTRUCTION(StringCompareAndBranch,
                                "string-compare-and-branch")
   DECLARE_HYDROGEN_ACCESSOR(StringCompareAndBranch)
@@ -743,6 +804,8 @@ class LHasInstanceTypeAndBranch: public LControlInstruction<1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(HasInstanceTypeAndBranch,
                                "has-instance-type-and-branch")
   DECLARE_HYDROGEN_ACCESSOR(HasInstanceTypeAndBranch)
@@ -757,6 +820,8 @@ class LGetCachedArrayIndex: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(GetCachedArrayIndex, "get-cached-array-index")
   DECLARE_HYDROGEN_ACCESSOR(GetCachedArrayIndex)
 };
@@ -768,6 +833,8 @@ class LHasCachedArrayIndexAndBranch: public LControlInstruction<1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(HasCachedArrayIndexAndBranch,
                                "has-cached-array-index-and-branch")
   DECLARE_HYDROGEN_ACCESSOR(HasCachedArrayIndexAndBranch)
@@ -784,6 +851,10 @@ class LClassOfTestAndBranch: public LControlInstruction<1, 2> {
     temps_[1] = temp2;
   }
 
+  LOperand* value() { return inputs_[0]; }
+  LOperand* temp() { return temps_[0]; }
+  LOperand* temp2() { return temps_[1]; }
+
   DECLARE_CONCRETE_INSTRUCTION(ClassOfTestAndBranch,
                                "class-of-test-and-branch")
   DECLARE_HYDROGEN_ACCESSOR(ClassOfTestAndBranch)
@@ -799,6 +870,9 @@ class LCmpT: public LTemplateInstruction<1, 2, 0> {
     inputs_[1] = right;
   }
 
+  LOperand* left() { return inputs_[0]; }
+  LOperand* right() { return inputs_[1]; }
+
   DECLARE_CONCRETE_INSTRUCTION(CmpT, "cmp-t")
   DECLARE_HYDROGEN_ACCESSOR(CompareGeneric)
 
@@ -827,6 +901,9 @@ class LInstanceOf: public LTemplateInstruction<1, 2, 0> {
     inputs_[1] = right;
   }
 
+  LOperand* left() { return inputs_[0]; }
+  LOperand* right() { return inputs_[1]; }
+
   DECLARE_CONCRETE_INSTRUCTION(InstanceOf, "instance-of")
 };
 
@@ -838,6 +915,9 @@ class LInstanceOfKnownGlobal: public LTemplateInstruction<1, 1, 1> {
     temps_[0] = temp;
   }
 
+  LOperand* value() { return inputs_[0]; }
+  LOperand* temp() { return temps_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(InstanceOfKnownGlobal,
                                "instance-of-known-global")
   DECLARE_HYDROGEN_ACCESSOR(InstanceOfKnownGlobal)
@@ -877,6 +957,9 @@ class LBitI: public LTemplateInstruction<1, 2, 0> {
     inputs_[1] = right;
   }
 
+  LOperand* left() { return inputs_[0]; }
+  LOperand* right() { return inputs_[1]; }
+
   Token::Value op() const { return hydrogen()->op(); }
 
   DECLARE_CONCRETE_INSTRUCTION(BitI, "bit-i")
@@ -893,7 +976,8 @@ class LShiftI: public LTemplateInstruction<1, 2, 0> {
   }
 
   Token::Value op() const { return op_; }
-
+  LOperand* left() { return inputs_[0]; }
+  LOperand* right() { return inputs_[1]; }
   bool can_deopt() const { return can_deopt_; }
 
   DECLARE_CONCRETE_INSTRUCTION(ShiftI, "shift-i")
@@ -911,6 +995,9 @@ class LSubI: public LTemplateInstruction<1, 2, 0> {
     inputs_[1] = right;
   }
 
+  LOperand* left() { return inputs_[0]; }
+  LOperand* right() { return inputs_[1]; }
+
   DECLARE_CONCRETE_INSTRUCTION(SubI, "sub-i")
   DECLARE_HYDROGEN_ACCESSOR(Sub)
 };
@@ -930,6 +1017,9 @@ class LConstantD: public LTemplateInstruction<1, 0, 1> {
   explicit LConstantD(LOperand* temp) {
     temps_[0] = temp;
   }
+
+  LOperand* temp() { return temps_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(ConstantD, "constant-d")
   DECLARE_HYDROGEN_ACCESSOR(Constant)
 
@@ -952,6 +1042,8 @@ class LBranch: public LControlInstruction<1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(Branch, "branch")
   DECLARE_HYDROGEN_ACCESSOR(Branch)
 
@@ -965,6 +1057,8 @@ class LCmpMapAndBranch: public LTemplateInstruction<0, 1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(CmpMapAndBranch, "cmp-map-and-branch")
   DECLARE_HYDROGEN_ACCESSOR(CompareMap)
 
@@ -986,6 +1080,8 @@ class LJSArrayLength: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(JSArrayLength, "js-array-length")
   DECLARE_HYDROGEN_ACCESSOR(JSArrayLength)
 };
@@ -997,6 +1093,8 @@ class LFixedArrayBaseLength: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(FixedArrayBaseLength,
                                "fixed-array-base-length")
   DECLARE_HYDROGEN_ACCESSOR(FixedArrayBaseLength)
@@ -1009,6 +1107,8 @@ class LMapEnumLength: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(MapEnumLength, "map-enum-length")
 };
 
@@ -1019,6 +1119,8 @@ class LElementsKind: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(ElementsKind, "elements-kind")
   DECLARE_HYDROGEN_ACCESSOR(ElementsKind)
 };
@@ -1030,6 +1132,8 @@ class LValueOf: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(ValueOf, "value-of")
   DECLARE_HYDROGEN_ACCESSOR(ValueOf)
 };
@@ -1041,22 +1145,49 @@ class LDateField: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = date;
   }
 
+  LOperand* date() { return inputs_[0]; }
+  Smi* index() const { return index_; }
+
   DECLARE_CONCRETE_INSTRUCTION(ValueOf, "date-field")
   DECLARE_HYDROGEN_ACCESSOR(ValueOf)
 
-  Smi* index() const { return index_; }
-
  private:
   Smi* index_;
 };
 
 
+class LSeqStringSetChar: public LTemplateInstruction<1, 3, 0> {
+ public:
+  LSeqStringSetChar(String::Encoding encoding,
+                    LOperand* string,
+                    LOperand* index,
+                    LOperand* value) : encoding_(encoding) {
+    inputs_[0] = string;
+    inputs_[1] = index;
+    inputs_[2] = value;
+  }
+
+  String::Encoding encoding() { return encoding_; }
+  LOperand* string() { return inputs_[0]; }
+  LOperand* index() { return inputs_[1]; }
+  LOperand* value() { return inputs_[2]; }
+
+  DECLARE_CONCRETE_INSTRUCTION(SeqStringSetChar, "seq-string-set-char")
+  DECLARE_HYDROGEN_ACCESSOR(SeqStringSetChar)
+
+ private:
+  String::Encoding encoding_;
+};
+
+
 class LThrow: public LTemplateInstruction<0, 1, 0> {
  public:
   explicit LThrow(LOperand* value) {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(Throw, "throw")
 };
 
@@ -1067,6 +1198,8 @@ class LBitNotI: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(BitNotI, "bit-not-i")
 };
 
@@ -1078,6 +1211,9 @@ class LAddI: public LTemplateInstruction<1, 2, 0> {
     inputs_[1] = right;
   }
 
+  LOperand* left() { return inputs_[0]; }
+  LOperand* right() { return inputs_[1]; }
+
   DECLARE_CONCRETE_INSTRUCTION(AddI, "add-i")
   DECLARE_HYDROGEN_ACCESSOR(Add)
 };
@@ -1090,6 +1226,9 @@ class LMathMinMax: public LTemplateInstruction<1, 2, 0> {
     inputs_[1] = right;
   }
 
+  LOperand* left() { return inputs_[0]; }
+  LOperand* right() { return inputs_[1]; }
+
   DECLARE_CONCRETE_INSTRUCTION(MathMinMax, "min-max")
   DECLARE_HYDROGEN_ACCESSOR(MathMinMax)
 };
@@ -1102,6 +1241,9 @@ class LPower: public LTemplateInstruction<1, 2, 0> {
     inputs_[1] = right;
   }
 
+  LOperand* left() { return inputs_[0]; }
+  LOperand* right() { return inputs_[1]; }
+
   DECLARE_CONCRETE_INSTRUCTION(Power, "power")
   DECLARE_HYDROGEN_ACCESSOR(Power)
 };
@@ -1113,6 +1255,8 @@ class LRandom: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = global_object;
   }
 
+  LOperand* global_object() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(Random, "random")
   DECLARE_HYDROGEN_ACCESSOR(Random)
 };
@@ -1127,6 +1271,8 @@ class LArithmeticD: public LTemplateInstruction<1, 2, 0> {
   }
 
   Token::Value op() const { return op_; }
+  LOperand* left() { return inputs_[0]; }
+  LOperand* right() { return inputs_[1]; }
 
   virtual Opcode opcode() const { return LInstruction::kArithmeticD; }
   virtual void CompileToNative(LCodeGen* generator);
@@ -1145,12 +1291,14 @@ class LArithmeticT: public LTemplateInstruction<1, 2, 0> {
     inputs_[1] = right;
   }
 
+  Token::Value op() const { return op_; }
+  LOperand* left() { return inputs_[0]; }
+  LOperand* right() { return inputs_[1]; }
+
   virtual Opcode opcode() const { return LInstruction::kArithmeticT; }
   virtual void CompileToNative(LCodeGen* generator);
   virtual const char* Mnemonic() const;
 
-  Token::Value op() const { return op_; }
-
  private:
   Token::Value op_;
 };
@@ -1162,6 +1310,8 @@ class LReturn: public LTemplateInstruction<0, 1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(Return, "return")
 };
 
@@ -1172,6 +1322,8 @@ class LLoadNamedField: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = object;
   }
 
+  LOperand* object() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(LoadNamedField, "load-named-field")
   DECLARE_HYDROGEN_ACCESSOR(LoadNamedField)
 };
@@ -1223,6 +1375,8 @@ class LLoadElements: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = object;
   }
 
+  LOperand* object() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(LoadElements, "load-elements")
 };
 
@@ -1233,61 +1387,33 @@ class LLoadExternalArrayPointer: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = object;
   }
 
+  LOperand* object() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(LoadExternalArrayPointer,
                                "load-external-array-pointer")
 };
 
 
-class LLoadKeyedFastElement: public LTemplateInstruction<1, 2, 0> {
+class LLoadKeyed: public LTemplateInstruction<1, 2, 0> {
  public:
-  LLoadKeyedFastElement(LOperand* elements, LOperand* key) {
+  LLoadKeyed(LOperand* elements, LOperand* key) {
     inputs_[0] = elements;
     inputs_[1] = key;
   }
 
-  DECLARE_CONCRETE_INSTRUCTION(LoadKeyedFastElement, "load-keyed-fast-element")
-  DECLARE_HYDROGEN_ACCESSOR(LoadKeyedFastElement)
-
-  LOperand* elements() { return inputs_[0]; }
-  LOperand* key() { return inputs_[1]; }
-  uint32_t additional_index() const { return hydrogen()->index_offset(); }
-};
-
+  DECLARE_CONCRETE_INSTRUCTION(LoadKeyed, "load-keyed")
+  DECLARE_HYDROGEN_ACCESSOR(LoadKeyed)
 
-class LLoadKeyedFastDoubleElement: public LTemplateInstruction<1, 2, 0> {
- public:
-  LLoadKeyedFastDoubleElement(LOperand* elements, LOperand* key) {
-    inputs_[0] = elements;
-    inputs_[1] = key;
+  bool is_external() const {
+    return hydrogen()->is_external();
   }
-
-  DECLARE_CONCRETE_INSTRUCTION(LoadKeyedFastDoubleElement,
-                               "load-keyed-fast-double-element")
-  DECLARE_HYDROGEN_ACCESSOR(LoadKeyedFastDoubleElement)
-
   LOperand* elements() { return inputs_[0]; }
   LOperand* key() { return inputs_[1]; }
+  virtual void PrintDataTo(StringStream* stream);
   uint32_t additional_index() const { return hydrogen()->index_offset(); }
-};
-
-
-class LLoadKeyedSpecializedArrayElement: public LTemplateInstruction<1, 2, 0> {
- public:
-  LLoadKeyedSpecializedArrayElement(LOperand* external_pointer, LOperand* key) {
-    inputs_[0] = external_pointer;
-    inputs_[1] = key;
-  }
-
-  DECLARE_CONCRETE_INSTRUCTION(LoadKeyedSpecializedArrayElement,
-                               "load-keyed-specialized-array-element")
-  DECLARE_HYDROGEN_ACCESSOR(LoadKeyedSpecializedArrayElement)
-
-  LOperand* external_pointer() { return inputs_[0]; }
-  LOperand* key() { return inputs_[1]; }
   ElementsKind elements_kind() const {
     return hydrogen()->elements_kind();
   }
-  uint32_t additional_index() const { return hydrogen()->index_offset(); }
 };
 
 
@@ -1334,10 +1460,11 @@ class LStoreGlobalCell: public LTemplateInstruction<0, 1, 1> {
     temps_[0] = temp;
   }
 
+  LOperand* value() { return inputs_[0]; }
+  LOperand* temp() { return temps_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(StoreGlobalCell, "store-global-cell")
   DECLARE_HYDROGEN_ACCESSOR(StoreGlobalCell)
-
-  LOperand* value() { return inputs_[0]; }
 };
 
 
@@ -1349,12 +1476,13 @@ class LStoreGlobalGeneric: public LTemplateInstruction<0, 2, 0> {
     inputs_[1] = value;
   }
 
+  LOperand* global_object() { return inputs_[0]; }
+  LOperand* value() { return inputs_[1]; }
+
   DECLARE_CONCRETE_INSTRUCTION(StoreGlobalGeneric, "store-global-generic")
   DECLARE_HYDROGEN_ACCESSOR(StoreGlobalGeneric)
 
-  LOperand* global_object() { return InputAt(0); }
   Handle<Object> name() const { return hydrogen()->name(); }
-  LOperand* value() { return InputAt(1); }
   StrictModeFlag strict_mode_flag() { return hydrogen()->strict_mode_flag(); }
 };
 
@@ -1365,10 +1493,11 @@ class LLoadContextSlot: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = context;
   }
 
+  LOperand* context() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(LoadContextSlot, "load-context-slot")
   DECLARE_HYDROGEN_ACCESSOR(LoadContextSlot)
 
-  LOperand* context() { return InputAt(0); }
   int slot_index() { return hydrogen()->slot_index(); }
 
   virtual void PrintDataTo(StringStream* stream);
@@ -1383,11 +1512,13 @@ class LStoreContextSlot: public LTemplateInstruction<0, 2, 1> {
     temps_[0] = temp;
   }
 
+  LOperand* context() { return inputs_[0]; }
+  LOperand* value() { return inputs_[1]; }
+  LOperand* temp() { return temps_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(StoreContextSlot, "store-context-slot")
   DECLARE_HYDROGEN_ACCESSOR(StoreContextSlot)
 
-  LOperand* context() { return InputAt(0); }
-  LOperand* value() { return InputAt(1); }
   int slot_index() { return hydrogen()->slot_index(); }
 
   virtual void PrintDataTo(StringStream* stream);
@@ -1400,6 +1531,8 @@ class LPushArgument: public LTemplateInstruction<0, 1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(PushArgument, "push-argument")
 };
 
@@ -1436,9 +1569,9 @@ class LOuterContext: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = context;
   }
 
-  DECLARE_CONCRETE_INSTRUCTION(OuterContext, "outer-context")
+  LOperand* context() { return inputs_[0]; }
 
-  LOperand* context() { return InputAt(0); }
+  DECLARE_CONCRETE_INSTRUCTION(OuterContext, "outer-context")
 };
 
 
@@ -1461,9 +1594,9 @@ class LGlobalReceiver: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = global_object;
   }
 
-  DECLARE_CONCRETE_INSTRUCTION(GlobalReceiver, "global-receiver")
+  LOperand* global() { return inputs_[0]; }
 
-  LOperand* global() { return InputAt(0); }
+  DECLARE_CONCRETE_INSTRUCTION(GlobalReceiver, "global-receiver")
 };
 
 
@@ -1485,11 +1618,11 @@ class LInvokeFunction: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = function;
   }
 
+  LOperand* function() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(InvokeFunction, "invoke-function")
   DECLARE_HYDROGEN_ACCESSOR(InvokeFunction)
 
-  LOperand* function() { return inputs_[0]; }
-
   virtual void PrintDataTo(StringStream* stream);
 
   int arity() const { return hydrogen()->argument_count() - 1; }
@@ -1570,6 +1703,8 @@ class LCallNew: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = constructor;
   }
 
+  LOperand* constructor() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(CallNew, "call-new")
   DECLARE_HYDROGEN_ACCESSOR(CallNew)
 
@@ -1595,6 +1730,8 @@ class LInteger32ToDouble: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(Integer32ToDouble, "int32-to-double")
 };
 
@@ -1606,6 +1743,9 @@ class LUint32ToDouble: public LTemplateInstruction<1, 1, 1> {
     temps_[0] = temp;
   }
 
+  LOperand* value() { return inputs_[0]; }
+  LOperand* temp() { return temps_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(Uint32ToDouble, "uint32-to-double")
 };
 
@@ -1616,6 +1756,8 @@ class LNumberTagI: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(NumberTagI, "number-tag-i")
 };
 
@@ -1627,6 +1769,9 @@ class LNumberTagU: public LTemplateInstruction<1, 1, 1> {
     temps_[0] = temp;
   }
 
+  LOperand* value() { return inputs_[0]; }
+  LOperand* temp() { return temps_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(NumberTagU, "number-tag-u")
 };
 
@@ -1638,6 +1783,9 @@ class LNumberTagD: public LTemplateInstruction<1, 1, 1> {
     temps_[0] = temp;
   }
 
+  LOperand* value() { return inputs_[0]; }
+  LOperand* temp() { return temps_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(NumberTagD, "number-tag-d")
 };
 
@@ -1649,6 +1797,8 @@ class LDoubleToI: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(DoubleToI, "double-to-i")
   DECLARE_HYDROGEN_ACCESSOR(UnaryOperation)
 
@@ -1664,6 +1814,9 @@ class LTaggedToI: public LTemplateInstruction<1, 1, 1> {
     temps_[0] = temp;
   }
 
+  LOperand* value() { return inputs_[0]; }
+  LOperand* temp() { return temps_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(TaggedToI, "tagged-to-i")
   DECLARE_HYDROGEN_ACCESSOR(UnaryOperation)
 
@@ -1677,6 +1830,8 @@ class LSmiTag: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(SmiTag, "smi-tag")
 };
 
@@ -1687,6 +1842,8 @@ class LNumberUntagD: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(NumberUntagD, "double-untag")
   DECLARE_HYDROGEN_ACCESSOR(Change);
 };
@@ -1699,10 +1856,11 @@ class LSmiUntag: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = value;
   }
 
-  DECLARE_CONCRETE_INSTRUCTION(SmiUntag, "smi-untag")
-
+  LOperand* value() { return inputs_[0]; }
   bool needs_check() const { return needs_check_; }
 
+  DECLARE_CONCRETE_INSTRUCTION(SmiUntag, "smi-untag")
+
  private:
   bool needs_check_;
 };
@@ -1716,14 +1874,15 @@ class LStoreNamedField: public LTemplateInstruction<0, 2, 1> {
     temps_[0] = temp;
   }
 
+  LOperand* object() { return inputs_[0]; }
+  LOperand* value() { return inputs_[1]; }
+  LOperand* temp() { return temps_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(StoreNamedField, "store-named-field")
   DECLARE_HYDROGEN_ACCESSOR(StoreNamedField)
 
   virtual void PrintDataTo(StringStream* stream);
 
-  LOperand* object() { return inputs_[0]; }
-  LOperand* value() { return inputs_[1]; }
-
   Handle<Object> name() const { return hydrogen()->name(); }
   bool is_in_object() { return hydrogen()->is_in_object(); }
   int offset() { return hydrogen()->offset(); }
@@ -1738,88 +1897,42 @@ class LStoreNamedGeneric: public LTemplateInstruction<0, 2, 0> {
     inputs_[1] = value;
   }
 
+  LOperand* object() { return inputs_[0]; }
+  LOperand* value() { return inputs_[1]; }
+
   DECLARE_CONCRETE_INSTRUCTION(StoreNamedGeneric, "store-named-generic")
   DECLARE_HYDROGEN_ACCESSOR(StoreNamedGeneric)
 
   virtual void PrintDataTo(StringStream* stream);
 
-  LOperand* object() { return inputs_[0]; }
-  LOperand* value() { return inputs_[1]; }
   Handle<Object> name() const { return hydrogen()->name(); }
   StrictModeFlag strict_mode_flag() { return hydrogen()->strict_mode_flag(); }
 };
 
 
-class LStoreKeyedFastElement: public LTemplateInstruction<0, 3, 0> {
+class LStoreKeyed: public LTemplateInstruction<0, 3, 0> {
  public:
-  LStoreKeyedFastElement(LOperand* obj, LOperand* key, LOperand* val) {
-    inputs_[0] = obj;
+  LStoreKeyed(LOperand* object, LOperand* key, LOperand* value) {
+    inputs_[0] = object;
     inputs_[1] = key;
-    inputs_[2] = val;
+    inputs_[2] = value;
   }
 
-  DECLARE_CONCRETE_INSTRUCTION(StoreKeyedFastElement,
-                               "store-keyed-fast-element")
-  DECLARE_HYDROGEN_ACCESSOR(StoreKeyedFastElement)
-
-  virtual void PrintDataTo(StringStream* stream);
-
-  LOperand* object() { return inputs_[0]; }
+  bool is_external() const { return hydrogen()->is_external(); }
+  LOperand* elements() { return inputs_[0]; }
   LOperand* key() { return inputs_[1]; }
   LOperand* value() { return inputs_[2]; }
-  uint32_t additional_index() const { return hydrogen()->index_offset(); }
-};
+  ElementsKind elements_kind() const { return hydrogen()->elements_kind(); }
 
-
-class LStoreKeyedFastDoubleElement: public LTemplateInstruction<0, 3, 0> {
- public:
-  LStoreKeyedFastDoubleElement(LOperand* elements,
-                               LOperand* key,
-                               LOperand* val) {
-    inputs_[0] = elements;
-    inputs_[1] = key;
-    inputs_[2] = val;
-  }
-
-  DECLARE_CONCRETE_INSTRUCTION(StoreKeyedFastDoubleElement,
-                               "store-keyed-fast-double-element")
-  DECLARE_HYDROGEN_ACCESSOR(StoreKeyedFastDoubleElement)
+  DECLARE_CONCRETE_INSTRUCTION(StoreKeyed, "store-keyed")
+  DECLARE_HYDROGEN_ACCESSOR(StoreKeyed)
 
   virtual void PrintDataTo(StringStream* stream);
-
-  LOperand* elements() { return inputs_[0]; }
-  LOperand* key() { return inputs_[1]; }
-  LOperand* value() { return inputs_[2]; }
-
   bool NeedsCanonicalization() { return hydrogen()->NeedsCanonicalization(); }
   uint32_t additional_index() const { return hydrogen()->index_offset(); }
 };
 
 
-class LStoreKeyedSpecializedArrayElement: public LTemplateInstruction<0, 3, 0> {
- public:
-  LStoreKeyedSpecializedArrayElement(LOperand* external_pointer,
-                                     LOperand* key,
-                                     LOperand* val) {
-    inputs_[0] = external_pointer;
-    inputs_[1] = key;
-    inputs_[2] = val;
-  }
-
-  DECLARE_CONCRETE_INSTRUCTION(StoreKeyedSpecializedArrayElement,
-                               "store-keyed-specialized-array-element")
-  DECLARE_HYDROGEN_ACCESSOR(StoreKeyedSpecializedArrayElement)
-
-  LOperand* external_pointer() { return inputs_[0]; }
-  LOperand* key() { return inputs_[1]; }
-  LOperand* value() { return inputs_[2]; }
-  ElementsKind elements_kind() const {
-    return hydrogen()->elements_kind();
-  }
-  uint32_t additional_index() const { return hydrogen()->index_offset(); }
-};
-
-
 class LStoreKeyedGeneric: public LTemplateInstruction<0, 3, 0> {
  public:
   LStoreKeyedGeneric(LOperand* object, LOperand* key, LOperand* value) {
@@ -1828,14 +1941,15 @@ class LStoreKeyedGeneric: public LTemplateInstruction<0, 3, 0> {
     inputs_[2] = value;
   }
 
+  LOperand* object() { return inputs_[0]; }
+  LOperand* key() { return inputs_[1]; }
+  LOperand* value() { return inputs_[2]; }
+
   DECLARE_CONCRETE_INSTRUCTION(StoreKeyedGeneric, "store-keyed-generic")
   DECLARE_HYDROGEN_ACCESSOR(StoreKeyedGeneric)
 
   virtual void PrintDataTo(StringStream* stream);
 
-  LOperand* object() { return inputs_[0]; }
-  LOperand* key() { return inputs_[1]; }
-  LOperand* value() { return inputs_[2]; }
   StrictModeFlag strict_mode_flag() { return hydrogen()->strict_mode_flag(); }
 };
 
@@ -1844,21 +1958,22 @@ class LTransitionElementsKind: public LTemplateInstruction<1, 1, 2> {
  public:
   LTransitionElementsKind(LOperand* object,
                           LOperand* new_map_temp,
-                          LOperand* temp_reg) {
+                          LOperand* temp) {
     inputs_[0] = object;
     temps_[0] = new_map_temp;
-    temps_[1] = temp_reg;
+    temps_[1] = temp;
   }
 
+  LOperand* object() { return inputs_[0]; }
+  LOperand* new_map_temp() { return temps_[0]; }
+  LOperand* temp() { return temps_[1]; }
+
   DECLARE_CONCRETE_INSTRUCTION(TransitionElementsKind,
                                "transition-elements-kind")
   DECLARE_HYDROGEN_ACCESSOR(TransitionElementsKind)
 
   virtual void PrintDataTo(StringStream* stream);
 
-  LOperand* object() { return inputs_[0]; }
-  LOperand* new_map_reg() { return temps_[0]; }
-  LOperand* temp_reg() { return temps_[1]; }
   Handle<Map> original_map() { return hydrogen()->original_map(); }
   Handle<Map> transitioned_map() { return hydrogen()->transitioned_map(); }
 };
@@ -1871,11 +1986,11 @@ class LStringAdd: public LTemplateInstruction<1, 2, 0> {
     inputs_[1] = right;
   }
 
-  DECLARE_CONCRETE_INSTRUCTION(StringAdd, "string-add")
-  DECLARE_HYDROGEN_ACCESSOR(StringAdd)
-
   LOperand* left() { return inputs_[0]; }
   LOperand* right() { return inputs_[1]; }
+
+  DECLARE_CONCRETE_INSTRUCTION(StringAdd, "string-add")
+  DECLARE_HYDROGEN_ACCESSOR(StringAdd)
 };
 
 
@@ -1886,11 +2001,11 @@ class LStringCharCodeAt: public LTemplateInstruction<1, 2, 0> {
     inputs_[1] = index;
   }
 
-  DECLARE_CONCRETE_INSTRUCTION(StringCharCodeAt, "string-char-code-at")
-  DECLARE_HYDROGEN_ACCESSOR(StringCharCodeAt)
-
   LOperand* string() { return inputs_[0]; }
   LOperand* index() { return inputs_[1]; }
+
+  DECLARE_CONCRETE_INSTRUCTION(StringCharCodeAt, "string-char-code-at")
+  DECLARE_HYDROGEN_ACCESSOR(StringCharCodeAt)
 };
 
 
@@ -1900,10 +2015,10 @@ class LStringCharFromCode: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = char_code;
   }
 
+  LOperand* char_code() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(StringCharFromCode, "string-char-from-code")
   DECLARE_HYDROGEN_ACCESSOR(StringCharFromCode)
-
-  LOperand* char_code() { return inputs_[0]; }
 };
 
 
@@ -1913,10 +2028,10 @@ class LStringLength: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = string;
   }
 
+  LOperand* string() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(StringLength, "string-length")
   DECLARE_HYDROGEN_ACCESSOR(StringLength)
-
-  LOperand* string() { return inputs_[0]; }
 };
 
 
@@ -1926,7 +2041,7 @@ class LCheckFunction: public LTemplateInstruction<0, 1, 0> {
     inputs_[0] = value;
   }
 
-  LOperand* value() { return InputAt(0); }
+  LOperand* value() { return inputs_[0]; }
 
   DECLARE_CONCRETE_INSTRUCTION(CheckFunction, "check-function")
   DECLARE_HYDROGEN_ACCESSOR(CheckFunction)
@@ -1939,6 +2054,8 @@ class LCheckInstanceType: public LTemplateInstruction<0, 1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(CheckInstanceType, "check-instance-type")
   DECLARE_HYDROGEN_ACCESSOR(CheckInstanceType)
 };
@@ -1950,17 +2067,21 @@ class LCheckMaps: public LTemplateInstruction<0, 1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(CheckMaps, "check-maps")
   DECLARE_HYDROGEN_ACCESSOR(CheckMaps)
 };
 
 
-class LCheckPrototypeMaps: public LTemplateInstruction<0, 0, 1> {
+class LCheckPrototypeMaps: public LTemplateInstruction<1, 0, 1> {
  public:
   explicit LCheckPrototypeMaps(LOperand* temp)  {
     temps_[0] = temp;
   }
 
+  LOperand* temp() { return temps_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(CheckPrototypeMaps, "check-prototype-maps")
   DECLARE_HYDROGEN_ACCESSOR(CheckPrototypeMaps)
 
@@ -1975,15 +2096,16 @@ class LCheckSmi: public LTemplateInstruction<0, 1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(CheckSmi, "check-smi")
 };
 
 
-class LClampDToUint8: public LTemplateInstruction<1, 1, 1> {
+class LClampDToUint8: public LTemplateInstruction<1, 1, 0> {
  public:
-  LClampDToUint8(LOperand* value, LOperand* temp) {
-    inputs_[0] = value;
-    temps_[0] = temp;
+  explicit LClampDToUint8(LOperand* unclamped) {
+    inputs_[0] = unclamped;
   }
 
   LOperand* unclamped() { return inputs_[0]; }
@@ -1994,8 +2116,8 @@ class LClampDToUint8: public LTemplateInstruction<1, 1, 1> {
 
 class LClampIToUint8: public LTemplateInstruction<1, 1, 0> {
  public:
-  explicit LClampIToUint8(LOperand* value) {
-    inputs_[0] = value;
+  explicit LClampIToUint8(LOperand* unclamped) {
+    inputs_[0] = unclamped;
   }
 
   LOperand* unclamped() { return inputs_[0]; }
@@ -2004,17 +2126,16 @@ class LClampIToUint8: public LTemplateInstruction<1, 1, 0> {
 };
 
 
-class LClampTToUint8: public LTemplateInstruction<1, 1, 2> {
+class LClampTToUint8: public LTemplateInstruction<1, 1, 1> {
  public:
-  LClampTToUint8(LOperand* value,
-                 LOperand* temp,
-                 LOperand* temp2) {
-    inputs_[0] = value;
-    temps_[0] = temp;
-    temps_[1] = temp2;
+  LClampTToUint8(LOperand* unclamped,
+                 LOperand* temp_xmm) {
+    inputs_[0] = unclamped;
+    temps_[0] = temp_xmm;
   }
 
   LOperand* unclamped() { return inputs_[0]; }
+  LOperand* temp_xmm() { return temps_[0]; }
 
   DECLARE_CONCRETE_INSTRUCTION(ClampTToUint8, "clamp-t-to-uint8")
 };
@@ -2026,6 +2147,8 @@ class LCheckNonSmi: public LTemplateInstruction<0, 1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(CheckNonSmi, "check-non-smi")
 };
 
@@ -2036,6 +2159,8 @@ class LAllocateObject: public LTemplateInstruction<1, 0, 1> {
     temps_[0] = temp;
   }
 
+  LOperand* temp() { return temps_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(AllocateObject, "allocate-object")
   DECLARE_HYDROGEN_ACCESSOR(AllocateObject)
 };
@@ -2084,6 +2209,8 @@ class LToFastProperties: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(ToFastProperties, "to-fast-properties")
   DECLARE_HYDROGEN_ACCESSOR(ToFastProperties)
 };
@@ -2095,6 +2222,8 @@ class LTypeof: public LTemplateInstruction<1, 1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(Typeof, "typeof")
 };
 
@@ -2105,6 +2234,8 @@ class LTypeofIsAndBranch: public LControlInstruction<1, 0> {
     inputs_[0] = value;
   }
 
+  LOperand* value() { return inputs_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(TypeofIsAndBranch, "typeof-is-and-branch")
   DECLARE_HYDROGEN_ACCESSOR(TypeofIsAndBranch)
 
@@ -2120,6 +2251,8 @@ class LIsConstructCallAndBranch: public LControlInstruction<0, 1> {
     temps_[0] = temp;
   }
 
+  LOperand* temp() { return temps_[0]; }
+
   DECLARE_CONCRETE_INSTRUCTION(IsConstructCallAndBranch,
                                "is-construct-call-and-branch")
   DECLARE_HYDROGEN_ACCESSOR(IsConstructCallAndBranch)
@@ -2133,10 +2266,10 @@ class LDeleteProperty: public LTemplateInstruction<1, 2, 0> {
     inputs_[1] = key;
   }
 
-  DECLARE_CONCRETE_INSTRUCTION(DeleteProperty, "delete-property")
-
   LOperand* object() { return inputs_[0]; }
   LOperand* key() { return inputs_[1]; }
+
+  DECLARE_CONCRETE_INSTRUCTION(DeleteProperty, "delete-property")
 };
 
 
diff --git a/deps/v8/src/x64/macro-assembler-x64.cc b/deps/v8/src/x64/macro-assembler-x64.cc
index 1b0f2fa2d4..4e4f2c572c 100644
--- a/deps/v8/src/x64/macro-assembler-x64.cc
+++ b/deps/v8/src/x64/macro-assembler-x64.cc
@@ -396,9 +396,7 @@ void MacroAssembler::RecordWrite(Register object,
   ASSERT(!object.is(value));
   ASSERT(!object.is(address));
   ASSERT(!value.is(address));
-  if (emit_debug_code()) {
-    AbortIfSmi(object);
-  }
+  AssertNotSmi(object);
 
   if (remembered_set_action == OMIT_REMEMBERED_SET &&
       !FLAG_incremental_marking) {
@@ -722,11 +720,28 @@ void MacroAssembler::CallApiFunctionAndReturn(Address function_address,
   movq(prev_next_address_reg, Operand(base_reg, kNextOffset));
   movq(prev_limit_reg, Operand(base_reg, kLimitOffset));
   addl(Operand(base_reg, kLevelOffset), Immediate(1));
+
+  if (FLAG_log_timer_events) {
+    FrameScope frame(this, StackFrame::MANUAL);
+    PushSafepointRegisters();
+    PrepareCallCFunction(0);
+    CallCFunction(ExternalReference::log_enter_external_function(isolate()), 0);
+    PopSafepointRegisters();
+  }
+
   // Call the api function!
   movq(rax, reinterpret_cast<int64_t>(function_address),
        RelocInfo::RUNTIME_ENTRY);
   call(rax);
 
+  if (FLAG_log_timer_events) {
+    FrameScope frame(this, StackFrame::MANUAL);
+    PushSafepointRegisters();
+    PrepareCallCFunction(0);
+    CallCFunction(ExternalReference::log_leave_external_function(isolate()), 0);
+    PopSafepointRegisters();
+  }
+
 #if defined(_WIN64) && !defined(__MINGW64__)
   // rax keeps a pointer to v8::Handle, unpack it.
   movq(rax, Operand(rax, 0));
@@ -1115,18 +1130,14 @@ void MacroAssembler::SmiTest(Register src) {
 
 
 void MacroAssembler::SmiCompare(Register smi1, Register smi2) {
-  if (emit_debug_code()) {
-    AbortIfNotSmi(smi1);
-    AbortIfNotSmi(smi2);
-  }
+  AssertSmi(smi1);
+  AssertSmi(smi2);
   cmpq(smi1, smi2);
 }
 
 
 void MacroAssembler::SmiCompare(Register dst, Smi* src) {
-  if (emit_debug_code()) {
-    AbortIfNotSmi(dst);
-  }
+  AssertSmi(dst);
   Cmp(dst, src);
 }
 
@@ -1143,27 +1154,21 @@ void MacroAssembler::Cmp(Register dst, Smi* src) {
 
 
 void MacroAssembler::SmiCompare(Register dst, const Operand& src) {
-  if (emit_debug_code()) {
-    AbortIfNotSmi(dst);
-    AbortIfNotSmi(src);
-  }
+  AssertSmi(dst);
+  AssertSmi(src);
   cmpq(dst, src);
 }
 
 
 void MacroAssembler::SmiCompare(const Operand& dst, Register src) {
-  if (emit_debug_code()) {
-    AbortIfNotSmi(dst);
-    AbortIfNotSmi(src);
-  }
+  AssertSmi(dst);
+  AssertSmi(src);
   cmpq(dst, src);
 }
 
 
 void MacroAssembler::SmiCompare(const Operand& dst, Smi* src) {
-  if (emit_debug_code()) {
-    AbortIfNotSmi(dst);
-  }
+  AssertSmi(dst);
   cmpl(Operand(dst, kSmiShift / kBitsPerByte), Immediate(src->value()));
 }
 
@@ -2213,16 +2218,19 @@ void MacroAssembler::JumpIfNotBothSequentialAsciiStrings(
   // Check that both are flat ASCII strings.
   ASSERT(kNotStringTag != 0);
   const int kFlatAsciiStringMask =
-      kIsNotStringMask | kStringRepresentationMask | kStringEncodingMask;
+      kIsNotStringMask | kStringEncodingMask | kAsciiDataHintMask |
+      kStringRepresentationMask;
   const int kFlatAsciiStringTag = ASCII_STRING_TYPE;
 
   andl(scratch1, Immediate(kFlatAsciiStringMask));
   andl(scratch2, Immediate(kFlatAsciiStringMask));
   // Interleave the bits to check both scratch1 and scratch2 in one test.
-  ASSERT_EQ(0, kFlatAsciiStringMask & (kFlatAsciiStringMask << 3));
-  lea(scratch1, Operand(scratch1, scratch2, times_8, 0));
+  ASSERT_EQ(0, kFlatAsciiStringMask & (kFlatAsciiStringMask << 8));
+  ASSERT_EQ(ASCII_STRING_TYPE, ASCII_STRING_TYPE & kFlatAsciiStringMask);
+  shl(scratch1, Immediate(8));
+  orl(scratch1, scratch2);
   cmpl(scratch1,
-       Immediate(kFlatAsciiStringTag + (kFlatAsciiStringTag << 3)));
+       Immediate(kFlatAsciiStringTag + (kFlatAsciiStringTag << 8)));
   j(not_equal, on_fail, near_jump);
 }
 
@@ -2240,7 +2248,7 @@ void MacroAssembler::JumpIfInstanceTypeIsNotSequentialAscii(
       kIsNotStringMask | kStringRepresentationMask | kStringEncodingMask;
 
   andl(scratch, Immediate(kFlatAsciiStringMask));
-  cmpl(scratch, Immediate(kStringTag | kSeqStringTag | kAsciiStringTag));
+  cmpl(scratch, Immediate(kStringTag | kSeqStringTag | kOneByteStringTag));
   j(not_equal, failure, near_jump);
 }
 
@@ -2258,17 +2266,19 @@ void MacroAssembler::JumpIfBothInstanceTypesAreNotSequentialAscii(
 
   // Check that both are flat ASCII strings.
   ASSERT(kNotStringTag != 0);
-  const int kFlatAsciiStringMask =
-      kIsNotStringMask | kStringRepresentationMask | kStringEncodingMask;
+  const int kFlatAsciiStringMask = kIsNotStringMask | kStringRepresentationMask
+          | kStringEncodingMask | kAsciiDataHintTag;
   const int kFlatAsciiStringTag = ASCII_STRING_TYPE;
 
   andl(scratch1, Immediate(kFlatAsciiStringMask));
   andl(scratch2, Immediate(kFlatAsciiStringMask));
   // Interleave the bits to check both scratch1 and scratch2 in one test.
-  ASSERT_EQ(0, kFlatAsciiStringMask & (kFlatAsciiStringMask << 3));
-  lea(scratch1, Operand(scratch1, scratch2, times_8, 0));
+  ASSERT_EQ(0, kFlatAsciiStringMask & (kFlatAsciiStringMask << 8));
+  ASSERT_EQ(ASCII_STRING_TYPE, ASCII_STRING_TYPE & kFlatAsciiStringMask);
+  shl(scratch1, Immediate(8));
+  orl(scratch1, scratch2);
   cmpl(scratch1,
-       Immediate(kFlatAsciiStringTag + (kFlatAsciiStringTag << 3)));
+       Immediate(kFlatAsciiStringTag + (kFlatAsciiStringTag << 8)));
   j(not_equal, on_fail, near_jump);
 }
 
@@ -2781,7 +2791,8 @@ void MacroAssembler::StoreNumberToDoubleElements(
     Register elements,
     Register index,
     XMMRegister xmm_scratch,
-    Label* fail) {
+    Label* fail,
+    int elements_offset) {
   Label smi_value, is_nan, maybe_nan, not_nan, have_double_value, done;
 
   JumpIfSmi(maybe_number, &smi_value, Label::kNear);
@@ -2800,7 +2811,8 @@ void MacroAssembler::StoreNumberToDoubleElements(
   bind(&not_nan);
   movsd(xmm_scratch, FieldOperand(maybe_number, HeapNumber::kValueOffset));
   bind(&have_double_value);
-  movsd(FieldOperand(elements, index, times_8, FixedDoubleArray::kHeaderSize),
+  movsd(FieldOperand(elements, index, times_8,
+                     FixedDoubleArray::kHeaderSize - elements_offset),
         xmm_scratch);
   jmp(&done);
 
@@ -2823,7 +2835,8 @@ void MacroAssembler::StoreNumberToDoubleElements(
   // Preserve original value.
   SmiToInteger32(kScratchRegister, maybe_number);
   cvtlsi2sd(xmm_scratch, kScratchRegister);
-  movsd(FieldOperand(elements, index, times_8, FixedDoubleArray::kHeaderSize),
+  movsd(FieldOperand(elements, index, times_8,
+                     FixedDoubleArray::kHeaderSize - elements_offset),
         xmm_scratch);
   bind(&done);
 }
@@ -2880,16 +2893,24 @@ void MacroAssembler::ClampUint8(Register reg) {
 
 void MacroAssembler::ClampDoubleToUint8(XMMRegister input_reg,
                                         XMMRegister temp_xmm_reg,
-                                        Register result_reg,
-                                        Register temp_reg) {
+                                        Register result_reg) {
   Label done;
-  Set(result_reg, 0);
+  Label conv_failure;
   xorps(temp_xmm_reg, temp_xmm_reg);
-  ucomisd(input_reg, temp_xmm_reg);
-  j(below, &done, Label::kNear);
   cvtsd2si(result_reg, input_reg);
   testl(result_reg, Immediate(0xFFFFFF00));
   j(zero, &done, Label::kNear);
+  cmpl(result_reg, Immediate(0x80000000));
+  j(equal, &conv_failure, Label::kNear);
+  movl(result_reg, Immediate(0));
+  setcc(above, result_reg);
+  subl(result_reg, Immediate(1));
+  andl(result_reg, Immediate(255));
+  jmp(&done, Label::kNear);
+  bind(&conv_failure);
+  Set(result_reg, 0);
+  ucomisd(input_reg, temp_xmm_reg);
+  j(below, &done, Label::kNear);
   Set(result_reg, 255);
   bind(&done);
 }
@@ -2917,19 +2938,13 @@ void MacroAssembler::LoadUint32(XMMRegister dst,
 
 void MacroAssembler::LoadInstanceDescriptors(Register map,
                                              Register descriptors) {
-  Register temp = descriptors;
-  movq(temp, FieldOperand(map, Map::kTransitionsOrBackPointerOffset));
+  movq(descriptors, FieldOperand(map, Map::kDescriptorsOffset));
+}
 
-  Label ok, fail;
-  CheckMap(temp,
-           isolate()->factory()->fixed_array_map(),
-           &fail,
-           DONT_DO_SMI_CHECK);
-  movq(descriptors, FieldOperand(temp, TransitionArray::kDescriptorsOffset));
-  jmp(&ok);
-  bind(&fail);
-  Move(descriptors, isolate()->factory()->empty_descriptor_array());
-  bind(&ok);
+
+void MacroAssembler::NumberOfOwnDescriptors(Register dst, Register map) {
+  movq(dst, FieldOperand(map, Map::kBitField3Offset));
+  DecodeField<Map::NumberOfOwnDescriptorsBits>(dst);
 }
 
 
@@ -2956,61 +2971,75 @@ void MacroAssembler::DispatchMap(Register obj,
 }
 
 
-void MacroAssembler::AbortIfNotNumber(Register object) {
-  Label ok;
-  Condition is_smi = CheckSmi(object);
-  j(is_smi, &ok, Label::kNear);
-  Cmp(FieldOperand(object, HeapObject::kMapOffset),
-      isolate()->factory()->heap_number_map());
-  Assert(equal, "Operand not a number");
-  bind(&ok);
+void MacroAssembler::AssertNumber(Register object) {
+  if (emit_debug_code()) {
+    Label ok;
+    Condition is_smi = CheckSmi(object);
+    j(is_smi, &ok, Label::kNear);
+    Cmp(FieldOperand(object, HeapObject::kMapOffset),
+        isolate()->factory()->heap_number_map());
+    Check(equal, "Operand is not a number");
+    bind(&ok);
+  }
 }
 
 
-void MacroAssembler::AbortIfSmi(Register object) {
-  Condition is_smi = CheckSmi(object);
-  Assert(NegateCondition(is_smi), "Operand is a smi");
+void MacroAssembler::AssertNotSmi(Register object) {
+  if (emit_debug_code()) {
+    Condition is_smi = CheckSmi(object);
+    Check(NegateCondition(is_smi), "Operand is a smi");
+  }
 }
 
 
-void MacroAssembler::AbortIfNotSmi(Register object) {
-  Condition is_smi = CheckSmi(object);
-  Assert(is_smi, "Operand is not a smi");
+void MacroAssembler::AssertSmi(Register object) {
+  if (emit_debug_code()) {
+    Condition is_smi = CheckSmi(object);
+    Check(is_smi, "Operand is not a smi");
+  }
 }
 
 
-void MacroAssembler::AbortIfNotSmi(const Operand& object) {
-  Condition is_smi = CheckSmi(object);
-  Assert(is_smi, "Operand is not a smi");
+void MacroAssembler::AssertSmi(const Operand& object) {
+  if (emit_debug_code()) {
+    Condition is_smi = CheckSmi(object);
+    Check(is_smi, "Operand is not a smi");
+  }
 }
 
 
-void MacroAssembler::AbortIfNotZeroExtended(Register int32_register) {
-  ASSERT(!int32_register.is(kScratchRegister));
-  movq(kScratchRegister, 0x100000000l, RelocInfo::NONE);
-  cmpq(kScratchRegister, int32_register);
-  Assert(above_equal, "32 bit value in register is not zero-extended");
+void MacroAssembler::AssertZeroExtended(Register int32_register) {
+  if (emit_debug_code()) {
+    ASSERT(!int32_register.is(kScratchRegister));
+    movq(kScratchRegister, 0x100000000l, RelocInfo::NONE);
+    cmpq(kScratchRegister, int32_register);
+    Check(above_equal, "32 bit value in register is not zero-extended");
+  }
 }
 
 
-void MacroAssembler::AbortIfNotString(Register object) {
-  testb(object, Immediate(kSmiTagMask));
-  Assert(not_equal, "Operand is not a string");
-  push(object);
-  movq(object, FieldOperand(object, HeapObject::kMapOffset));
-  CmpInstanceType(object, FIRST_NONSTRING_TYPE);
-  pop(object);
-  Assert(below, "Operand is not a string");
+void MacroAssembler::AssertString(Register object) {
+  if (emit_debug_code()) {
+    testb(object, Immediate(kSmiTagMask));
+    Check(not_equal, "Operand is a smi and not a string");
+    push(object);
+    movq(object, FieldOperand(object, HeapObject::kMapOffset));
+    CmpInstanceType(object, FIRST_NONSTRING_TYPE);
+    pop(object);
+    Check(below, "Operand is not a string");
+  }
 }
 
 
-void MacroAssembler::AbortIfNotRootValue(Register src,
-                                         Heap::RootListIndex root_value_index,
-                                         const char* message) {
-  ASSERT(!src.is(kScratchRegister));
-  LoadRoot(kScratchRegister, root_value_index);
-  cmpq(src, kScratchRegister);
-  Check(equal, message);
+void MacroAssembler::AssertRootValue(Register src,
+                                     Heap::RootListIndex root_value_index,
+                                     const char* message) {
+  if (emit_debug_code()) {
+    ASSERT(!src.is(kScratchRegister));
+    LoadRoot(kScratchRegister, root_value_index);
+    cmpq(src, kScratchRegister);
+    Check(equal, message);
+  }
 }
 
 
@@ -3953,7 +3982,7 @@ void MacroAssembler::AllocateAsciiString(Register result,
                                          Label* gc_required) {
   // Calculate the number of bytes needed for the characters in the string while
   // observing object alignment.
-  const int kHeaderAlignment = SeqAsciiString::kHeaderSize &
+  const int kHeaderAlignment = SeqOneByteString::kHeaderSize &
                                kObjectAlignmentMask;
   movl(scratch1, length);
   ASSERT(kCharSize == 1);
@@ -3964,7 +3993,7 @@ void MacroAssembler::AllocateAsciiString(Register result,
   }
 
   // Allocate ASCII string in new space.
-  AllocateInNewSpace(SeqAsciiString::kHeaderSize,
+  AllocateInNewSpace(SeqOneByteString::kHeaderSize,
                      times_1,
                      scratch1,
                      result,
@@ -4499,7 +4528,7 @@ void MacroAssembler::EnsureNotWhite(
 
   bind(&not_external);
   // Sequential string, either ASCII or UC16.
-  ASSERT(kAsciiStringTag == 0x04);
+  ASSERT(kOneByteStringTag == 0x04);
   and_(length, Immediate(kStringEncodingMask));
   xor_(length, Immediate(kStringEncodingMask));
   addq(length, Immediate(0x04));
diff --git a/deps/v8/src/x64/macro-assembler-x64.h b/deps/v8/src/x64/macro-assembler-x64.h
index 5268fe2a2e..0d8d6f2cca 100644
--- a/deps/v8/src/x64/macro-assembler-x64.h
+++ b/deps/v8/src/x64/macro-assembler-x64.h
@@ -895,7 +895,8 @@ class MacroAssembler: public Assembler {
                                    Register elements,
                                    Register index,
                                    XMMRegister xmm_scratch,
-                                   Label* fail);
+                                   Label* fail,
+                                   int elements_offset = 0);
 
   // Compare an object's map with the specified map and its transitioned
   // elements maps if mode is ALLOW_ELEMENT_TRANSITION_MAPS. FLAGS are set with
@@ -942,43 +943,45 @@ class MacroAssembler: public Assembler {
 
   void ClampDoubleToUint8(XMMRegister input_reg,
                           XMMRegister temp_xmm_reg,
-                          Register result_reg,
-                          Register temp_reg);
+                          Register result_reg);
 
   void LoadUint32(XMMRegister dst, Register src, XMMRegister scratch);
 
   void LoadInstanceDescriptors(Register map, Register descriptors);
   void EnumLength(Register dst, Register map);
+  void NumberOfOwnDescriptors(Register dst, Register map);
 
   template<typename Field>
   void DecodeField(Register reg) {
-    static const int full_shift = Field::kShift + kSmiShift;
-    static const int low_mask = Field::kMask >> Field::kShift;
-    shr(reg, Immediate(full_shift));
-    and_(reg, Immediate(low_mask));
+    static const int shift = Field::kShift + kSmiShift;
+    static const int mask = Field::kMask >> Field::kShift;
+    shr(reg, Immediate(shift));
+    and_(reg, Immediate(mask));
+    shl(reg, Immediate(kSmiShift));
   }
 
-  // Abort execution if argument is not a number. Used in debug code.
-  void AbortIfNotNumber(Register object);
+  // Abort execution if argument is not a number, enabled via --debug-code.
+  void AssertNumber(Register object);
 
-  // Abort execution if argument is a smi. Used in debug code.
-  void AbortIfSmi(Register object);
+  // Abort execution if argument is a smi, enabled via --debug-code.
+  void AssertNotSmi(Register object);
 
-  // Abort execution if argument is not a smi. Used in debug code.
-  void AbortIfNotSmi(Register object);
-  void AbortIfNotSmi(const Operand& object);
+  // Abort execution if argument is not a smi, enabled via --debug-code.
+  void AssertSmi(Register object);
+  void AssertSmi(const Operand& object);
 
   // Abort execution if a 64 bit register containing a 32 bit payload does not
-  // have zeros in the top 32 bits.
-  void AbortIfNotZeroExtended(Register reg);
+  // have zeros in the top 32 bits, enabled via --debug-code.
+  void AssertZeroExtended(Register reg);
 
-  // Abort execution if argument is a string. Used in debug code.
-  void AbortIfNotString(Register object);
+  // Abort execution if argument is not a string, enabled via --debug-code.
+  void AssertString(Register object);
 
-  // Abort execution if argument is not the root value with the given index.
-  void AbortIfNotRootValue(Register src,
-                           Heap::RootListIndex root_value_index,
-                           const char* message);
+  // Abort execution if argument is not the root value with the given index,
+  // enabled via --debug-code.
+  void AssertRootValue(Register src,
+                       Heap::RootListIndex root_value_index,
+                       const char* message);
 
   // ---------------------------------------------------------------------------
   // Exception handling
diff --git a/deps/v8/src/x64/regexp-macro-assembler-x64.cc b/deps/v8/src/x64/regexp-macro-assembler-x64.cc
index 86f7bfe6ca..6cb87e899e 100644
--- a/deps/v8/src/x64/regexp-macro-assembler-x64.cc
+++ b/deps/v8/src/x64/regexp-macro-assembler-x64.cc
@@ -1305,7 +1305,7 @@ int RegExpMacroAssemblerX64::CheckStackGuardState(Address* return_address,
   Handle<String> subject(frame_entry<String*>(re_frame, kInputString));
 
   // Current string.
-  bool is_ascii = subject->IsAsciiRepresentationUnderneath();
+  bool is_ascii = subject->IsOneByteRepresentationUnderneath();
 
   ASSERT(re_code->instruction_start() <= *return_address);
   ASSERT(*return_address <=
@@ -1336,7 +1336,7 @@ int RegExpMacroAssemblerX64::CheckStackGuardState(Address* return_address,
   }
 
   // String might have changed.
-  if (subject_tmp->IsAsciiRepresentation() != is_ascii) {
+  if (subject_tmp->IsOneByteRepresentation() != is_ascii) {
     // If we changed between an ASCII and an UC16 string, the specialized
     // code cannot be used, and we need to restart regexp matching from
     // scratch (including, potentially, compiling a new version of the code).
diff --git a/deps/v8/src/x64/stub-cache-x64.cc b/deps/v8/src/x64/stub-cache-x64.cc
index cd71086eec..683aa9d409 100644
--- a/deps/v8/src/x64/stub-cache-x64.cc
+++ b/deps/v8/src/x64/stub-cache-x64.cc
@@ -350,18 +350,23 @@ void StubCompiler::GenerateFastPropertyLoad(MacroAssembler* masm,
                                             Register dst,
                                             Register src,
                                             Handle<JSObject> holder,
-                                            int index) {
-  // Adjust for the number of properties stored in the holder.
-  index -= holder->map()->inobject_properties();
-  if (index < 0) {
-    // Get the property straight out of the holder.
-    int offset = holder->map()->instance_size() + (index * kPointerSize);
+                                            PropertyIndex index) {
+  if (index.is_header_index()) {
+    int offset = index.header_index() * kPointerSize;
     __ movq(dst, FieldOperand(src, offset));
   } else {
-    // Calculate the offset into the properties array.
-    int offset = index * kPointerSize + FixedArray::kHeaderSize;
-    __ movq(dst, FieldOperand(src, JSObject::kPropertiesOffset));
-    __ movq(dst, FieldOperand(dst, offset));
+    // Adjust for the number of properties stored in the holder.
+    int slot = index.field_index() - holder->map()->inobject_properties();
+    if (slot < 0) {
+      // Get the property straight out of the holder.
+      int offset = holder->map()->instance_size() + (slot * kPointerSize);
+      __ movq(dst, FieldOperand(src, offset));
+    } else {
+      // Calculate the offset into the properties array.
+      int offset = slot * kPointerSize + FixedArray::kHeaderSize;
+      __ movq(dst, FieldOperand(src, JSObject::kPropertiesOffset));
+      __ movq(dst, FieldOperand(dst, offset));
+    }
   }
 }
 
@@ -1013,7 +1018,7 @@ void StubCompiler::GenerateLoadField(Handle<JSObject> object,
                                      Register scratch1,
                                      Register scratch2,
                                      Register scratch3,
-                                     int index,
+                                     PropertyIndex index,
                                      Handle<String> name,
                                      Label* miss) {
   // Check that the receiver isn't a smi.
@@ -1388,7 +1393,7 @@ void CallStubCompiler::GenerateMissBranch() {
 
 Handle<Code> CallStubCompiler::CompileCallField(Handle<JSObject> object,
                                                 Handle<JSObject> holder,
-                                                int index,
+                                                PropertyIndex index,
                                                 Handle<String> name) {
   // ----------- S t a t e -------------
   // rcx                 : function name
@@ -1482,7 +1487,7 @@ Handle<Code> CallStubCompiler::CompileArrayPushCall(
     Label call_builtin;
 
     if (argc == 1) {  // Otherwise fall through to call builtin.
-      Label attempt_to_grow_elements, with_write_barrier;
+      Label attempt_to_grow_elements, with_write_barrier, check_double;
 
       // Get the elements array of the object.
       __ movq(rdi, FieldOperand(rdx, JSArray::kElementsOffset));
@@ -1490,7 +1495,7 @@ Handle<Code> CallStubCompiler::CompileArrayPushCall(
       // Check that the elements are in fast mode and writable.
       __ Cmp(FieldOperand(rdi, HeapObject::kMapOffset),
              factory()->fixed_array_map());
-      __ j(not_equal, &call_builtin);
+      __ j(not_equal, &check_double);
 
       // Get the array's length into rax and calculate new length.
       __ SmiToInteger32(rax, FieldOperand(rdx, JSArray::kLengthOffset));
@@ -1521,6 +1526,34 @@ Handle<Code> CallStubCompiler::CompileArrayPushCall(
       __ Integer32ToSmi(rax, rax);  // Return new length as smi.
       __ ret((argc + 1) * kPointerSize);
 
+      __ bind(&check_double);
+
+      // Check that the elements are in double mode.
+      __ Cmp(FieldOperand(rdi, HeapObject::kMapOffset),
+             factory()->fixed_double_array_map());
+      __ j(not_equal, &call_builtin);
+
+      // Get the array's length into rax and calculate new length.
+      __ SmiToInteger32(rax, FieldOperand(rdx, JSArray::kLengthOffset));
+      STATIC_ASSERT(FixedArray::kMaxLength < Smi::kMaxValue);
+      __ addl(rax, Immediate(argc));
+
+      // Get the elements' length into rcx.
+      __ SmiToInteger32(rcx, FieldOperand(rdi, FixedArray::kLengthOffset));
+
+      // Check if we could survive without allocation.
+      __ cmpl(rax, rcx);
+      __ j(greater, &call_builtin);
+
+      __ movq(rcx, Operand(rsp, argc * kPointerSize));
+      __ StoreNumberToDoubleElements(
+          rcx, rdi, rax, xmm0, &call_builtin, argc * kDoubleSize);
+
+      // Save new length.
+      __ Integer32ToSmiField(FieldOperand(rdx, JSArray::kLengthOffset), rax);
+      __ Integer32ToSmi(rax, rax);  // Return new length as smi.
+      __ ret((argc + 1) * kPointerSize);
+
       __ bind(&with_write_barrier);
 
       __ movq(rbx, FieldOperand(rdx, HeapObject::kMapOffset));
@@ -1532,6 +1565,9 @@ Handle<Code> CallStubCompiler::CompileArrayPushCall(
         // In case of fast smi-only, convert to fast object, otherwise bail out.
         __ bind(&not_fast_object);
         __ CheckFastSmiElements(rbx, &call_builtin);
+        __ Cmp(FieldOperand(rcx, HeapObject::kMapOffset),
+               factory()->heap_number_map());
+        __ j(equal, &call_builtin);
         // rdx: receiver
         // rbx: map
 
@@ -2780,7 +2816,7 @@ Handle<Code> LoadStubCompiler::CompileLoadNonexistent(Handle<String> name,
 
 Handle<Code> LoadStubCompiler::CompileLoadField(Handle<JSObject> object,
                                                 Handle<JSObject> holder,
-                                                int index,
+                                                PropertyIndex index,
                                                 Handle<String> name) {
   // ----------- S t a t e -------------
   //  -- rax    : receiver
@@ -2973,7 +3009,7 @@ Handle<Code> LoadStubCompiler::CompileLoadGlobal(
 Handle<Code> KeyedLoadStubCompiler::CompileLoadField(Handle<String> name,
                                                      Handle<JSObject> receiver,
                                                      Handle<JSObject> holder,
-                                                     int index) {
+                                                     PropertyIndex index) {
   // ----------- S t a t e -------------
   //  -- rax     : key
   //  -- rdx     : receiver
@@ -3240,6 +3276,7 @@ Handle<Code> ConstructStubCompiler::CompileConstructStub(
 #endif
 
   // Load the initial map and verify that it is in fact a map.
+  // rdi: constructor
   __ movq(rbx, FieldOperand(rdi, JSFunction::kPrototypeOrInitialMapOffset));
   // Will both indicate a NULL and a Smi.
   STATIC_ASSERT(kSmiTag == 0);
@@ -3249,18 +3286,22 @@ Handle<Code> ConstructStubCompiler::CompileConstructStub(
 
 #ifdef DEBUG
   // Cannot construct functions this way.
-  // rdi: constructor
   // rbx: initial map
   __ CmpInstanceType(rbx, JS_FUNCTION_TYPE);
-  __ Assert(not_equal, "Function constructed by construct stub.");
+  __ Check(not_equal, "Function constructed by construct stub.");
 #endif
 
   // Now allocate the JSObject in new space.
-  // rdi: constructor
   // rbx: initial map
+  ASSERT(function->has_initial_map());
+  int instance_size = function->initial_map()->instance_size();
+#ifdef DEBUG
   __ movzxbq(rcx, FieldOperand(rbx, Map::kInstanceSizeOffset));
   __ shl(rcx, Immediate(kPointerSizeLog2));
-  __ AllocateInNewSpace(rcx, rdx, rcx, no_reg,
+  __ cmpq(rcx, Immediate(instance_size));
+  __ Check(equal, "Instance size of initial map changed.");
+#endif
+  __ AllocateInNewSpace(instance_size, rdx, rcx, no_reg,
                         &generic_stub_call, NO_ALLOCATION_FLAGS);
 
   // Allocated the JSObject, now initialize the fields and add the heap tag.
@@ -3306,7 +3347,6 @@ Handle<Code> ConstructStubCompiler::CompileConstructStub(
   }
 
   // Fill the unused in-object property fields with undefined.
-  ASSERT(function->has_initial_map());
   for (int i = shared->this_property_assignments_count();
        i < function->initial_map()->inobject_properties();
        i++) {
@@ -3986,7 +4026,7 @@ void KeyedStoreStubCompiler::GenerateStoreFastDoubleElement(
   //  -- rsp[0] : return address
   // -----------------------------------
   Label miss_force_generic, transition_elements_kind, finish_store;
-  Label grow, slow, check_capacity;
+  Label grow, slow, check_capacity, restore_key_transition_elements_kind;
 
   // This stub is meant to be tail-jumped to, the receiver must already
   // have been verified by the caller to not be a smi.
@@ -4015,7 +4055,7 @@ void KeyedStoreStubCompiler::GenerateStoreFastDoubleElement(
   __ bind(&finish_store);
   __ SmiToInteger32(rcx, rcx);
   __ StoreNumberToDoubleElements(rax, rdi, rcx, xmm0,
-                                 &transition_elements_kind);
+                                 &restore_key_transition_elements_kind);
   __ ret(0);
 
   // Handle store cache miss, replacing the ic with the generic stub.
@@ -4024,9 +4064,10 @@ void KeyedStoreStubCompiler::GenerateStoreFastDoubleElement(
       masm->isolate()->builtins()->KeyedStoreIC_MissForceGeneric();
   __ jmp(ic_force_generic, RelocInfo::CODE_TARGET);
 
-  __ bind(&transition_elements_kind);
+  __ bind(&restore_key_transition_elements_kind);
   // Restore smi-tagging of rcx.
   __ Integer32ToSmi(rcx, rcx);
+  __ bind(&transition_elements_kind);
   Handle<Code> ic_miss = masm->isolate()->builtins()->KeyedStoreIC_Miss();
   __ jmp(ic_miss, RelocInfo::CODE_TARGET);
 
@@ -4067,6 +4108,16 @@ void KeyedStoreStubCompiler::GenerateStoreFastDoubleElement(
     __ Move(FieldOperand(rdi, FixedDoubleArray::kLengthOffset),
             Smi::FromInt(JSArray::kPreallocatedArrayElements));
 
+    // Increment the length of the array.
+    __ SmiToInteger32(rcx, rcx);
+    __ StoreNumberToDoubleElements(rax, rdi, rcx, xmm0,
+                                   &restore_key_transition_elements_kind);
+
+    __ movq(r8, BitCast<int64_t, uint64_t>(kHoleNanInt64), RelocInfo::NONE);
+    for (int i = 1; i < JSArray::kPreallocatedArrayElements; i++) {
+      __ movq(FieldOperand(rdi, FixedDoubleArray::OffsetOfElementAt(i)), r8);
+    }
+
     // Install the new backing store in the JSArray.
     __ movq(FieldOperand(rdx, JSObject::kElementsOffset), rdi);
     __ RecordWriteField(rdx, JSObject::kElementsOffset, rdi, rbx,
@@ -4075,7 +4126,7 @@ void KeyedStoreStubCompiler::GenerateStoreFastDoubleElement(
     // Increment the length of the array.
     __ Move(FieldOperand(rdx, JSArray::kLengthOffset), Smi::FromInt(1));
     __ movq(rdi, FieldOperand(rdx, JSObject::kElementsOffset));
-    __ jmp(&finish_store);
+    __ ret(0);
 
     __ bind(&check_capacity);
     // rax: value
diff --git a/deps/v8/test/benchmarks/testcfg.py b/deps/v8/test/benchmarks/testcfg.py
index ab9d40fec5..5bbad7ac1b 100644
--- a/deps/v8/test/benchmarks/testcfg.py
+++ b/deps/v8/test/benchmarks/testcfg.py
@@ -30,6 +30,11 @@ import test
 import os
 from os.path import join, split
 
+def GetSuite(name, root):
+  # Not implemented.
+  return None
+
+
 def IsNumber(string):
   try:
     float(string)
diff --git a/deps/v8/test/cctest/cctest.gyp b/deps/v8/test/cctest/cctest.gyp
index 7624d5b5d6..80eecfd031 100644
--- a/deps/v8/test/cctest/cctest.gyp
+++ b/deps/v8/test/cctest/cctest.gyp
@@ -79,6 +79,7 @@
         'test-lockers.cc',
         'test-log.cc',
         'test-mark-compact.cc',
+        'test-object-observe.cc',
         'test-parsing.cc',
         'test-platform-tls.cc',
         'test-profile-generator.cc',
@@ -187,7 +188,7 @@
             '<(generated_file)',
           ],
           'action': [
-            '<(python)',
+            'python',
             '../../tools/js2c.py',
             '<@(_outputs)',
             'TEST',  # type
diff --git a/deps/v8/test/cctest/cctest.h b/deps/v8/test/cctest/cctest.h
index 0b93562216..88cb9b8c5d 100644
--- a/deps/v8/test/cctest/cctest.h
+++ b/deps/v8/test/cctest/cctest.h
@@ -214,4 +214,43 @@ static inline v8::Local<v8::Value> CompileRun(const char* source) {
 }
 
 
+// Helper function that compiles and runs the source with given origin.
+static inline v8::Local<v8::Value> CompileRunWithOrigin(const char* source,
+                                                        const char* origin_url,
+                                                        int line_number,
+                                                        int column_number) {
+  v8::ScriptOrigin origin(v8::String::New(origin_url),
+                          v8::Integer::New(line_number),
+                          v8::Integer::New(column_number));
+  return v8::Script::Compile(v8::String::New(source), &origin)->Run();
+}
+
+
+// Pick a slightly different port to allow tests to be run in parallel.
+static inline int FlagDependentPortOffset() {
+  return ::v8::internal::FLAG_crankshaft == false ? 100 :
+         ::v8::internal::FLAG_always_opt ? 200 : 0;
+}
+
+
+// Helper function that simulates a fill new-space in the heap.
+static inline void SimulateFullSpace(v8::internal::NewSpace* space) {
+  int new_linear_size = static_cast<int>(
+      *space->allocation_limit_address() - *space->allocation_top_address());
+  v8::internal::MaybeObject* maybe = space->AllocateRaw(new_linear_size);
+  v8::internal::FreeListNode* node = v8::internal::FreeListNode::cast(maybe);
+  node->set_size(space->heap(), new_linear_size);
+}
+
+
+// Helper function that simulates a full old-space in the heap.
+static inline void SimulateFullSpace(v8::internal::PagedSpace* space) {
+  int old_linear_size = static_cast<int>(space->limit() - space->top());
+  space->Free(space->top(), old_linear_size);
+  space->SetTop(space->limit(), space->limit());
+  space->ResetFreeList();
+  space->ClearStats();
+}
+
+
 #endif  // ifndef CCTEST_H_
diff --git a/deps/v8/test/cctest/cctest.status b/deps/v8/test/cctest/cctest.status
index df2c520567..ab59e3356f 100644
--- a/deps/v8/test/cctest/cctest.status
+++ b/deps/v8/test/cctest/cctest.status
@@ -68,11 +68,6 @@ test-api/OutOfMemoryNested: SKIP
 # BUG(355): Test crashes on ARM.
 test-log/ProfLazyMode: SKIP
 
-# BUG(945): Tests using Socket cannot be run in parallel.
-test-debug/DebuggerAgent: SKIP
-test-debug/DebuggerAgentProtocolOverflowHeader: SKIP
-test-sockets/Socket: SKIP
-
 # BUG(1075): Unresolved crashes.
 test-serialize/Deserialize: SKIP
 test-serialize/DeserializeFromSecondSerializationAndRunScript2: SKIP
@@ -90,7 +85,5 @@ test-log/ProfLazyMode: SKIP
 # platform-tls.h does not contain an ANDROID-related header.
 test-platform-tls/FastTLS: SKIP
 
-# BUG(945): Tests using Socket cannot be run in parallel.
-test-debug/DebuggerAgent: SKIP
-test-debug/DebuggerAgentProtocolOverflowHeader: SKIP
-test-sockets/Socket: SKIP
+# This test times out.
+test-threads/ThreadJoinSelf: SKIP
diff --git a/deps/v8/test/cctest/test-accessors.cc b/deps/v8/test/cctest/test-accessors.cc
index 0b342ff3d9..d44503534f 100644
--- a/deps/v8/test/cctest/test-accessors.cc
+++ b/deps/v8/test/cctest/test-accessors.cc
@@ -453,3 +453,29 @@ THREADED_TEST(HandleScopeSegment) {
       "result;"))->Run();
   CHECK_EQ(100, result->Int32Value());
 }
+
+
+v8::Handle<v8::Array> JSONStringifyEnumerator(const AccessorInfo& info) {
+  v8::Handle<v8::Array> array = v8::Array::New(1);
+  array->Set(0, v8_str("regress"));
+  return array;
+}
+
+
+v8::Handle<v8::Value> JSONStringifyGetter(Local<String> name,
+                                          const AccessorInfo& info) {
+  return v8_str("crbug-161028");
+}
+
+
+THREADED_TEST(JSONStringifyNamedInterceptorObject) {
+  v8::HandleScope scope;
+  LocalContext env;
+
+  v8::Handle<v8::ObjectTemplate> obj = ObjectTemplate::New();
+  obj->SetNamedPropertyHandler(
+      JSONStringifyGetter, NULL, NULL, NULL, JSONStringifyEnumerator);
+  env->Global()->Set(v8_str("obj"), obj->NewInstance());
+  v8::Handle<v8::String> expected = v8_str("{\"regress\":\"crbug-161028\"}");
+  CHECK(CompileRun("JSON.stringify(obj)")->Equals(expected));
+}
diff --git a/deps/v8/test/cctest/test-alloc.cc b/deps/v8/test/cctest/test-alloc.cc
index 50e60da271..bbae5ebd3e 100644
--- a/deps/v8/test/cctest/test-alloc.cc
+++ b/deps/v8/test/cctest/test-alloc.cc
@@ -34,34 +34,13 @@
 using namespace v8::internal;
 
 
-// Also used in test-heap.cc test cases.
-void SimulateFullSpace(PagedSpace* space) {
-  int old_linear_size = static_cast<int>(space->limit() - space->top());
-  space->Free(space->top(), old_linear_size);
-  space->SetTop(space->limit(), space->limit());
-  space->ResetFreeList();
-  space->ClearStats();
-}
-
-
 static MaybeObject* AllocateAfterFailures() {
   static int attempts = 0;
   if (++attempts < 3) return Failure::RetryAfterGC();
   Heap* heap = Isolate::Current()->heap();
 
   // New space.
-  NewSpace* new_space = heap->new_space();
-  static const int kNewSpaceFillerSize = ByteArray::SizeFor(0);
-  while (new_space->Available() > kNewSpaceFillerSize) {
-    int available_before = static_cast<int>(new_space->Available());
-    CHECK(!heap->AllocateByteArray(0)->IsFailure());
-    if (available_before == new_space->Available()) {
-      // It seems that we are avoiding new space allocations when
-      // allocation is forced, so no need to fill up new space
-      // in order to make the test harder.
-      break;
-    }
-  }
+  SimulateFullSpace(heap->new_space());
   CHECK(!heap->AllocateByteArray(100)->IsFailure());
   CHECK(!heap->AllocateFixedArray(100, NOT_TENURED)->IsFailure());
 
@@ -76,7 +55,7 @@ static MaybeObject* AllocateAfterFailures() {
 
   // Old data space.
   SimulateFullSpace(heap->old_data_space());
-  CHECK(!heap->AllocateRawAsciiString(100, TENURED)->IsFailure());
+  CHECK(!heap->AllocateRawOneByteString(100, TENURED)->IsFailure());
 
   // Old pointer space.
   SimulateFullSpace(heap->old_pointer_space());
@@ -100,6 +79,7 @@ static MaybeObject* AllocateAfterFailures() {
   CHECK(!heap->AllocateMap(JS_OBJECT_TYPE, instance_size)->IsFailure());
 
   // Test that we can allocate in old pointer space and code space.
+  SimulateFullSpace(heap->code_space());
   CHECK(!heap->AllocateFixedArray(100, TENURED)->IsFailure());
   CHECK(!heap->CopyCode(Isolate::Current()->builtins()->builtin(
       Builtins::kIllegal))->IsFailure());
@@ -155,10 +135,10 @@ TEST(StressJS) {
       FACTORY->NewStringFromAscii(Vector<const char>("get", 3));
   ASSERT(instance_descriptors->IsEmpty());
 
-  Handle<DescriptorArray> new_descriptors = FACTORY->NewDescriptorArray(1);
+  Handle<DescriptorArray> new_descriptors = FACTORY->NewDescriptorArray(0, 1);
 
   v8::internal::DescriptorArray::WhitenessWitness witness(*new_descriptors);
-  v8::internal::Map::SetDescriptors(map, new_descriptors);
+  map->set_instance_descriptors(*new_descriptors);
 
   CallbacksDescriptor d(*name,
                         *foreign,
diff --git a/deps/v8/test/cctest/test-api.cc b/deps/v8/test/cctest/test-api.cc
index 1e12652c0a..0a5583bb94 100644
--- a/deps/v8/test/cctest/test-api.cc
+++ b/deps/v8/test/cctest/test-api.cc
@@ -25,6 +25,9 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+// We want to test our deprecated API entries, too.
+#define V8_DISABLE_DEPRECATIONS 1
+
 #include <limits.h>
 
 #ifndef WIN32
@@ -404,6 +407,10 @@ THREADED_TEST(ScriptUsingStringResource) {
     CHECK(source->IsExternal());
     CHECK_EQ(resource,
              static_cast<TestResource*>(source->GetExternalStringResource()));
+    String::Encoding encoding = String::UNKNOWN_ENCODING;
+    CHECK_EQ(static_cast<const String::ExternalStringResourceBase*>(resource),
+             source->GetExternalStringResourceBase(&encoding));
+    CHECK_EQ(String::TWO_BYTE_ENCODING, encoding);
     HEAP->CollectAllGarbage(i::Heap::kNoGCFlags);
     CHECK_EQ(0, dispose_count);
   }
@@ -419,9 +426,16 @@ THREADED_TEST(ScriptUsingAsciiStringResource) {
   {
     v8::HandleScope scope;
     LocalContext env;
-    Local<String> source =
-        String::NewExternal(new TestAsciiResource(i::StrDup(c_source),
-                                                  &dispose_count));
+    TestAsciiResource* resource = new TestAsciiResource(i::StrDup(c_source),
+                                                        &dispose_count);
+    Local<String> source = String::NewExternal(resource);
+    CHECK(source->IsExternalAscii());
+    CHECK_EQ(static_cast<const String::ExternalStringResourceBase*>(resource),
+             source->GetExternalAsciiStringResource());
+    String::Encoding encoding = String::UNKNOWN_ENCODING;
+    CHECK_EQ(static_cast<const String::ExternalStringResourceBase*>(resource),
+             source->GetExternalStringResourceBase(&encoding));
+    CHECK_EQ(String::ASCII_ENCODING, encoding);
     Local<Script> script = Script::Compile(source);
     Local<Value> value = script->Run();
     CHECK(value->IsNumber());
@@ -445,6 +459,11 @@ THREADED_TEST(ScriptMakingExternalString) {
     // Trigger GCs so that the newly allocated string moves to old gen.
     HEAP->CollectGarbage(i::NEW_SPACE);  // in survivor space now
     HEAP->CollectGarbage(i::NEW_SPACE);  // in old gen now
+    CHECK_EQ(source->IsExternal(), false);
+    CHECK_EQ(source->IsExternalAscii(), false);
+    String::Encoding encoding = String::UNKNOWN_ENCODING;
+    CHECK_EQ(NULL, source->GetExternalStringResourceBase(&encoding));
+    CHECK_EQ(String::ASCII_ENCODING, encoding);
     bool success = source->MakeExternal(new TestResource(two_byte_source,
                                                          &dispose_count));
     CHECK(success);
@@ -607,6 +626,8 @@ THREADED_TEST(UsingExternalAsciiString) {
 
 
 THREADED_TEST(ScavengeExternalString) {
+  i::FLAG_stress_compaction = false;
+  i::FLAG_gc_global = false;
   int dispose_count = 0;
   bool in_new_space = false;
   {
@@ -627,6 +648,8 @@ THREADED_TEST(ScavengeExternalString) {
 
 
 THREADED_TEST(ScavengeExternalAsciiString) {
+  i::FLAG_stress_compaction = false;
+  i::FLAG_gc_global = false;
   int dispose_count = 0;
   bool in_new_space = false;
   {
@@ -953,22 +976,33 @@ THREADED_TEST(FindInstanceInPrototypeChain) {
 THREADED_TEST(TinyInteger) {
   v8::HandleScope scope;
   LocalContext env;
+  v8::Isolate* isolate = v8::Isolate::GetCurrent();
+
   int32_t value = 239;
   Local<v8::Integer> value_obj = v8::Integer::New(value);
   CHECK_EQ(static_cast<int64_t>(value), value_obj->Value());
+
+  value_obj = v8::Integer::New(value, isolate);
+  CHECK_EQ(static_cast<int64_t>(value), value_obj->Value());
 }
 
 
 THREADED_TEST(BigSmiInteger) {
   v8::HandleScope scope;
   LocalContext env;
+  v8::Isolate* isolate = v8::Isolate::GetCurrent();
+
   int32_t value = i::Smi::kMaxValue;
   // We cannot add one to a Smi::kMaxValue without wrapping.
   if (i::kSmiValueSize < 32) {
     CHECK(i::Smi::IsValid(value));
     CHECK(!i::Smi::IsValid(value + 1));
+
     Local<v8::Integer> value_obj = v8::Integer::New(value);
     CHECK_EQ(static_cast<int64_t>(value), value_obj->Value());
+
+    value_obj = v8::Integer::New(value, isolate);
+    CHECK_EQ(static_cast<int64_t>(value), value_obj->Value());
   }
 }
 
@@ -976,6 +1010,8 @@ THREADED_TEST(BigSmiInteger) {
 THREADED_TEST(BigInteger) {
   v8::HandleScope scope;
   LocalContext env;
+  v8::Isolate* isolate = v8::Isolate::GetCurrent();
+
   // We cannot add one to a Smi::kMaxValue without wrapping.
   if (i::kSmiValueSize < 32) {
     // The casts allow this to compile, even if Smi::kMaxValue is 2^31-1.
@@ -984,8 +1020,12 @@ THREADED_TEST(BigInteger) {
         static_cast<int32_t>(static_cast<uint32_t>(i::Smi::kMaxValue) + 1);
     CHECK(value > i::Smi::kMaxValue);
     CHECK(!i::Smi::IsValid(value));
+
     Local<v8::Integer> value_obj = v8::Integer::New(value);
     CHECK_EQ(static_cast<int64_t>(value), value_obj->Value());
+
+    value_obj = v8::Integer::New(value, isolate);
+    CHECK_EQ(static_cast<int64_t>(value), value_obj->Value());
   }
 }
 
@@ -993,42 +1033,66 @@ THREADED_TEST(BigInteger) {
 THREADED_TEST(TinyUnsignedInteger) {
   v8::HandleScope scope;
   LocalContext env;
+  v8::Isolate* isolate = v8::Isolate::GetCurrent();
+
   uint32_t value = 239;
+
   Local<v8::Integer> value_obj = v8::Integer::NewFromUnsigned(value);
   CHECK_EQ(static_cast<int64_t>(value), value_obj->Value());
+
+  value_obj = v8::Integer::NewFromUnsigned(value, isolate);
+  CHECK_EQ(static_cast<int64_t>(value), value_obj->Value());
 }
 
 
 THREADED_TEST(BigUnsignedSmiInteger) {
   v8::HandleScope scope;
   LocalContext env;
+  v8::Isolate* isolate = v8::Isolate::GetCurrent();
+
   uint32_t value = static_cast<uint32_t>(i::Smi::kMaxValue);
   CHECK(i::Smi::IsValid(value));
   CHECK(!i::Smi::IsValid(value + 1));
+
   Local<v8::Integer> value_obj = v8::Integer::NewFromUnsigned(value);
   CHECK_EQ(static_cast<int64_t>(value), value_obj->Value());
+
+  value_obj = v8::Integer::NewFromUnsigned(value, isolate);
+  CHECK_EQ(static_cast<int64_t>(value), value_obj->Value());
 }
 
 
 THREADED_TEST(BigUnsignedInteger) {
   v8::HandleScope scope;
   LocalContext env;
+  v8::Isolate* isolate = v8::Isolate::GetCurrent();
+
   uint32_t value = static_cast<uint32_t>(i::Smi::kMaxValue) + 1;
   CHECK(value > static_cast<uint32_t>(i::Smi::kMaxValue));
   CHECK(!i::Smi::IsValid(value));
+
   Local<v8::Integer> value_obj = v8::Integer::NewFromUnsigned(value);
   CHECK_EQ(static_cast<int64_t>(value), value_obj->Value());
+
+  value_obj = v8::Integer::NewFromUnsigned(value, isolate);
+  CHECK_EQ(static_cast<int64_t>(value), value_obj->Value());
 }
 
 
 THREADED_TEST(OutOfSignedRangeUnsignedInteger) {
   v8::HandleScope scope;
   LocalContext env;
+  v8::Isolate* isolate = v8::Isolate::GetCurrent();
+
   uint32_t INT32_MAX_AS_UINT = (1U << 31) - 1;
   uint32_t value = INT32_MAX_AS_UINT + 1;
   CHECK(value > INT32_MAX_AS_UINT);  // No overflow.
+
   Local<v8::Integer> value_obj = v8::Integer::NewFromUnsigned(value);
   CHECK_EQ(static_cast<int64_t>(value), value_obj->Value());
+
+  value_obj = v8::Integer::NewFromUnsigned(value, isolate);
+  CHECK_EQ(static_cast<int64_t>(value), value_obj->Value());
 }
 
 
@@ -1999,6 +2063,99 @@ THREADED_TEST(InternalFieldsNativePointersAndExternal) {
 }
 
 
+static void CheckAlignedPointerInInternalField(Handle<v8::Object> obj,
+                                               void* value) {
+  CHECK_EQ(0, static_cast<int>(reinterpret_cast<uintptr_t>(value) & 0x1));
+  obj->SetPointerInInternalField(0, value);
+  HEAP->CollectAllGarbage(i::Heap::kNoGCFlags);
+  CHECK_EQ(value, obj->GetPointerFromInternalField(0));
+}
+
+
+THREADED_TEST(InternalFieldsAlignedPointers) {
+  v8::HandleScope scope;
+  LocalContext env;
+
+  Local<v8::FunctionTemplate> templ = v8::FunctionTemplate::New();
+  Local<v8::ObjectTemplate> instance_templ = templ->InstanceTemplate();
+  instance_templ->SetInternalFieldCount(1);
+  Local<v8::Object> obj = templ->GetFunction()->NewInstance();
+  CHECK_EQ(1, obj->InternalFieldCount());
+
+  CheckAlignedPointerInInternalField(obj, NULL);
+
+  int* heap_allocated = new int[100];
+  CheckAlignedPointerInInternalField(obj, heap_allocated);
+  delete[] heap_allocated;
+
+  int stack_allocated[100];
+  CheckAlignedPointerInInternalField(obj, stack_allocated);
+
+  void* huge = reinterpret_cast<void*>(~static_cast<uintptr_t>(1));
+  CheckAlignedPointerInInternalField(obj, huge);
+}
+
+
+static void CheckAlignedPointerInEmbedderData(LocalContext* env,
+                                              int index,
+                                              void* value) {
+  CHECK_EQ(0, static_cast<int>(reinterpret_cast<uintptr_t>(value) & 0x1));
+  (*env)->SetAlignedPointerInEmbedderData(index, value);
+  HEAP->CollectAllGarbage(i::Heap::kNoGCFlags);
+  CHECK_EQ(value, (*env)->GetAlignedPointerFromEmbedderData(index));
+}
+
+
+static void* AlignedTestPointer(int i) {
+  return reinterpret_cast<void*>(i * 1234);
+}
+
+
+THREADED_TEST(EmbedderDataAlignedPointers) {
+  v8::HandleScope scope;
+  LocalContext env;
+
+  CheckAlignedPointerInEmbedderData(&env, 0, NULL);
+
+  int* heap_allocated = new int[100];
+  CheckAlignedPointerInEmbedderData(&env, 1, heap_allocated);
+  delete[] heap_allocated;
+
+  int stack_allocated[100];
+  CheckAlignedPointerInEmbedderData(&env, 2, stack_allocated);
+
+  void* huge = reinterpret_cast<void*>(~static_cast<uintptr_t>(1));
+  CheckAlignedPointerInEmbedderData(&env, 3, huge);
+
+  // Test growing of the embedder data's backing store.
+  for (int i = 0; i < 100; i++) {
+    env->SetAlignedPointerInEmbedderData(i, AlignedTestPointer(i));
+  }
+  HEAP->CollectAllGarbage(i::Heap::kNoGCFlags);
+  for (int i = 0; i < 100; i++) {
+    CHECK_EQ(AlignedTestPointer(i), env->GetAlignedPointerFromEmbedderData(i));
+  }
+}
+
+
+static void CheckEmbedderData(LocalContext* env,
+                              int index,
+                              v8::Handle<Value> data) {
+  (*env)->SetEmbedderData(index, data);
+  CHECK((*env)->GetEmbedderData(index)->StrictEquals(data));
+}
+
+THREADED_TEST(EmbedderData) {
+  v8::HandleScope scope;
+  LocalContext env;
+
+  CheckEmbedderData(&env, 3, v8::String::New("The quick brown fox jumps"));
+  CheckEmbedderData(&env, 2, v8::String::New("over the lazy dog."));
+  CheckEmbedderData(&env, 1, v8::Number::New(1.2345));
+  CheckEmbedderData(&env, 0, v8::Boolean::New(true));
+}
+
+
 THREADED_TEST(IdentityHash) {
   v8::HandleScope scope;
   LocalContext env;
@@ -2192,6 +2349,24 @@ THREADED_TEST(GlobalHandle) {
   }
   CHECK_EQ(global->Length(), 3);
   global.Dispose();
+
+  {
+    v8::HandleScope scope;
+    Local<String> str = v8_str("str");
+    global = v8::Persistent<String>::New(str);
+  }
+  CHECK_EQ(global->Length(), 3);
+  global.Dispose(v8::Isolate::GetCurrent());
+}
+
+
+THREADED_TEST(LocalHandle) {
+  v8::HandleScope scope;
+  v8::Local<String> local = v8::Local<String>::New(v8_str("str"));
+  CHECK_EQ(local->Length(), 3);
+
+  local = v8::Local<String>::New(v8::Isolate::GetCurrent(), v8_str("str"));
+  CHECK_EQ(local->Length(), 3);
 }
 
 
@@ -2312,23 +2487,41 @@ THREADED_TEST(ApiObjectGroupsCycle) {
   Persistent<Object> g2s2;
   Persistent<Object> g3s1;
   Persistent<Object> g3s2;
+  Persistent<Object> g4s1;
+  Persistent<Object> g4s2;
 
+  v8::Isolate* isolate = v8::Isolate::GetCurrent();
   {
     HandleScope scope;
     g1s1 = Persistent<Object>::New(Object::New());
     g1s2 = Persistent<Object>::New(Object::New());
     g1s1.MakeWeak(reinterpret_cast<void*>(&counter), &WeakPointerCallback);
     g1s2.MakeWeak(reinterpret_cast<void*>(&counter), &WeakPointerCallback);
+    CHECK(g1s1.IsWeak());
+    CHECK(g1s2.IsWeak());
 
     g2s1 = Persistent<Object>::New(Object::New());
     g2s2 = Persistent<Object>::New(Object::New());
     g2s1.MakeWeak(reinterpret_cast<void*>(&counter), &WeakPointerCallback);
     g2s2.MakeWeak(reinterpret_cast<void*>(&counter), &WeakPointerCallback);
+    CHECK(g2s1.IsWeak());
+    CHECK(g2s2.IsWeak());
 
     g3s1 = Persistent<Object>::New(Object::New());
     g3s2 = Persistent<Object>::New(Object::New());
     g3s1.MakeWeak(reinterpret_cast<void*>(&counter), &WeakPointerCallback);
     g3s2.MakeWeak(reinterpret_cast<void*>(&counter), &WeakPointerCallback);
+    CHECK(g3s1.IsWeak());
+    CHECK(g3s2.IsWeak());
+
+    g4s1 = Persistent<Object>::New(Object::New());
+    g4s2 = Persistent<Object>::New(Object::New());
+    g4s1.MakeWeak(isolate,
+                  reinterpret_cast<void*>(&counter), &WeakPointerCallback);
+    g4s2.MakeWeak(isolate,
+                  reinterpret_cast<void*>(&counter), &WeakPointerCallback);
+    CHECK(g4s1.IsWeak(isolate));
+    CHECK(g4s2.IsWeak(isolate));
   }
 
   Persistent<Object> root = Persistent<Object>::New(g1s1);  // make a root.
@@ -2342,13 +2535,17 @@ THREADED_TEST(ApiObjectGroupsCycle) {
     Persistent<Value> g2_objects[] = { g2s1, g2s2 };
     Persistent<Value> g2_children[] = { g3s1 };
     Persistent<Value> g3_objects[] = { g3s1, g3s2 };
-    Persistent<Value> g3_children[] = { g1s1 };
+    Persistent<Value> g3_children[] = { g4s1 };
+    Persistent<Value> g4_objects[] = { g4s1, g4s2 };
+    Persistent<Value> g4_children[] = { g1s1 };
     V8::AddObjectGroup(g1_objects, 2);
     V8::AddImplicitReferences(g1s1, g1_children, 1);
     V8::AddObjectGroup(g2_objects, 2);
     V8::AddImplicitReferences(g2s1, g2_children, 1);
     V8::AddObjectGroup(g3_objects, 2);
     V8::AddImplicitReferences(g3s1, g3_children, 1);
+    V8::AddObjectGroup(isolate, g4_objects, 2);
+    V8::AddImplicitReferences(g4s1, g4_children, 1);
   }
   // Do a single full GC
   HEAP->CollectAllGarbage(i::Heap::kAbortIncrementalMarkingMask);
@@ -2366,17 +2563,117 @@ THREADED_TEST(ApiObjectGroupsCycle) {
     Persistent<Value> g2_objects[] = { g2s1, g2s2 };
     Persistent<Value> g2_children[] = { g3s1 };
     Persistent<Value> g3_objects[] = { g3s1, g3s2 };
-    Persistent<Value> g3_children[] = { g1s1 };
+    Persistent<Value> g3_children[] = { g4s1 };
+    Persistent<Value> g4_objects[] = { g4s1, g4s2 };
+    Persistent<Value> g4_children[] = { g1s1 };
     V8::AddObjectGroup(g1_objects, 2);
     V8::AddImplicitReferences(g1s1, g1_children, 1);
     V8::AddObjectGroup(g2_objects, 2);
     V8::AddImplicitReferences(g2s1, g2_children, 1);
     V8::AddObjectGroup(g3_objects, 2);
     V8::AddImplicitReferences(g3s1, g3_children, 1);
+    V8::AddObjectGroup(g4_objects, 2);
+    V8::AddImplicitReferences(g4s1, g4_children, 1);
   }
 
   HEAP->CollectAllGarbage(i::Heap::kAbortIncrementalMarkingMask);
 
+  // All objects should be gone. 9 global handles in total.
+  CHECK_EQ(9, counter.NumberOfWeakCalls());
+}
+
+
+// TODO(mstarzinger): This should be a THREADED_TEST but causes failures
+// on the buildbots, so was made non-threaded for the time being.
+TEST(ApiObjectGroupsCycleForScavenger) {
+  i::FLAG_stress_compaction = false;
+  i::FLAG_gc_global = false;
+  HandleScope scope;
+  LocalContext env;
+
+  WeakCallCounter counter(1234);
+
+  Persistent<Object> g1s1;
+  Persistent<Object> g1s2;
+  Persistent<Object> g2s1;
+  Persistent<Object> g2s2;
+  Persistent<Object> g3s1;
+  Persistent<Object> g3s2;
+
+  {
+    HandleScope scope;
+    g1s1 = Persistent<Object>::New(Object::New());
+    g1s2 = Persistent<Object>::New(Object::New());
+    g1s1.MakeWeak(reinterpret_cast<void*>(&counter), &WeakPointerCallback);
+    g1s2.MakeWeak(reinterpret_cast<void*>(&counter), &WeakPointerCallback);
+
+    g2s1 = Persistent<Object>::New(Object::New());
+    g2s2 = Persistent<Object>::New(Object::New());
+    g2s1.MakeWeak(reinterpret_cast<void*>(&counter), &WeakPointerCallback);
+    g2s2.MakeWeak(reinterpret_cast<void*>(&counter), &WeakPointerCallback);
+
+    g3s1 = Persistent<Object>::New(Object::New());
+    g3s2 = Persistent<Object>::New(Object::New());
+    g3s1.MakeWeak(reinterpret_cast<void*>(&counter), &WeakPointerCallback);
+    g3s2.MakeWeak(reinterpret_cast<void*>(&counter), &WeakPointerCallback);
+  }
+
+  // Make a root.
+  Persistent<Object> root = Persistent<Object>::New(g1s1);
+  root.MarkPartiallyDependent();
+
+  // Connect groups.  We're building the following cycle:
+  // G1: { g1s1, g2s1 }, g1s1 implicitly references g2s1, ditto for other
+  // groups.
+  {
+    g1s1.MarkPartiallyDependent();
+    g1s2.MarkPartiallyDependent();
+    g2s1.MarkPartiallyDependent();
+    g2s2.MarkPartiallyDependent();
+    g3s1.MarkPartiallyDependent();
+    g3s2.MarkPartiallyDependent();
+    Persistent<Value> g1_objects[] = { g1s1, g1s2 };
+    Persistent<Value> g2_objects[] = { g2s1, g2s2 };
+    Persistent<Value> g3_objects[] = { g3s1, g3s2 };
+    V8::AddObjectGroup(g1_objects, 2);
+    g1s1->Set(v8_str("x"), g2s1);
+    V8::AddObjectGroup(g2_objects, 2);
+    g2s1->Set(v8_str("x"), g3s1);
+    V8::AddObjectGroup(g3_objects, 2);
+    g3s1->Set(v8_str("x"), g1s1);
+  }
+
+  HEAP->CollectGarbage(i::NEW_SPACE);
+
+  // All objects should be alive.
+  CHECK_EQ(0, counter.NumberOfWeakCalls());
+
+  // Weaken the root.
+  root.MakeWeak(reinterpret_cast<void*>(&counter), &WeakPointerCallback);
+  root.MarkPartiallyDependent();
+
+  v8::Isolate* isolate = v8::Isolate::GetCurrent();
+  // Groups are deleted, rebuild groups.
+  {
+    g1s1.MarkPartiallyDependent(isolate);
+    g1s2.MarkPartiallyDependent(isolate);
+    g2s1.MarkPartiallyDependent(isolate);
+    g2s2.MarkPartiallyDependent(isolate);
+    g3s1.MarkPartiallyDependent(isolate);
+    g3s2.MarkPartiallyDependent(isolate);
+    Persistent<Value> g1_objects[] = { g1s1, g1s2 };
+    Persistent<Value> g2_objects[] = { g2s1, g2s2 };
+    Persistent<Value> g3_objects[] = { g3s1, g3s2 };
+    V8::AddObjectGroup(g1_objects, 2);
+    g1s1->Set(v8_str("x"), g2s1);
+    V8::AddObjectGroup(g2_objects, 2);
+    g2s1->Set(v8_str("x"), g3s1);
+    V8::AddObjectGroup(g3_objects, 2);
+    g3s1->Set(v8_str("x"), g1s1);
+  }
+
+  HEAP->CollectGarbage(i::NEW_SPACE);
+
   // All objects should be gone. 7 global handles in total.
   CHECK_EQ(7, counter.NumberOfWeakCalls());
 }
@@ -2395,23 +2692,34 @@ THREADED_TEST(ScriptException) {
 }
 
 
+TEST(TryCatchCustomException) {
+  v8::HandleScope scope;
+  LocalContext env;
+  v8::TryCatch try_catch;
+  CompileRun("function CustomError() { this.a = 'b'; }"
+             "(function f() { throw new CustomError(); })();");
+  CHECK(try_catch.HasCaught());
+  CHECK(try_catch.Exception()->ToObject()->
+            Get(v8_str("a"))->Equals(v8_str("b")));
+}
+
+
 bool message_received;
 
 
-static void check_message(v8::Handle<v8::Message> message,
-                          v8::Handle<Value> data) {
-  CHECK_EQ(5.76, data->NumberValue());
+static void check_message_0(v8::Handle<v8::Message> message,
+                            v8::Handle<Value> data) {
   CHECK_EQ(6.75, message->GetScriptResourceName()->NumberValue());
   CHECK_EQ(7.56, message->GetScriptData()->NumberValue());
   message_received = true;
 }
 
 
-THREADED_TEST(MessageHandlerData) {
+THREADED_TEST(MessageHandler0) {
   message_received = false;
   v8::HandleScope scope;
   CHECK(!message_received);
-  v8::V8::AddMessageListener(check_message, v8_num(5.76));
+  v8::V8::AddMessageListener(check_message_0);
   LocalContext context;
   v8::ScriptOrigin origin =
       v8::ScriptOrigin(v8_str("6.75"));
@@ -2421,7 +2729,56 @@ THREADED_TEST(MessageHandlerData) {
   script->Run();
   CHECK(message_received);
   // clear out the message listener
-  v8::V8::RemoveMessageListeners(check_message);
+  v8::V8::RemoveMessageListeners(check_message_0);
+}
+
+
+static void check_message_1(v8::Handle<v8::Message> message,
+                            v8::Handle<Value> data) {
+  CHECK(data->IsNumber());
+  CHECK_EQ(1337, data->Int32Value());
+  message_received = true;
+}
+
+
+TEST(MessageHandler1) {
+  message_received = false;
+  v8::HandleScope scope;
+  CHECK(!message_received);
+  v8::V8::AddMessageListener(check_message_1);
+  LocalContext context;
+  CompileRun("throw 1337;");
+  CHECK(message_received);
+  // clear out the message listener
+  v8::V8::RemoveMessageListeners(check_message_1);
+}
+
+
+static void check_message_2(v8::Handle<v8::Message> message,
+                            v8::Handle<Value> data) {
+  LocalContext context;
+  CHECK(data->IsObject());
+  v8::Local<v8::Value> hidden_property =
+      v8::Object::Cast(*data)->GetHiddenValue(v8_str("hidden key"));
+  CHECK(v8_str("hidden value")->Equals(hidden_property));
+  message_received = true;
+}
+
+
+TEST(MessageHandler2) {
+  message_received = false;
+  v8::HandleScope scope;
+  CHECK(!message_received);
+  v8::V8::AddMessageListener(check_message_2);
+  LocalContext context;
+  v8::Local<v8::Value> error = v8::Exception::Error(v8_str("custom error"));
+  v8::Object::Cast(*error)->SetHiddenValue(v8_str("hidden key"),
+                                           v8_str("hidden value"));
+  context->Global()->Set(v8_str("error"), error);
+  CompileRun("throw error;");
+  CHECK(message_received);
+  // clear out the message listener
+  v8::V8::RemoveMessageListeners(check_message_2);
 }
 
 
@@ -3062,7 +3419,7 @@ TEST(APIThrowMessageOverwrittenToString) {
              "Number.prototype.toString = function() { return 'Whoops'; };"
              "ReferenceError.prototype.toString = Object.prototype.toString;");
   CompileRun("asdf;");
-  v8::V8::RemoveMessageListeners(check_message);
+  v8::V8::RemoveMessageListeners(check_reference_error_message);
 }
 
 
@@ -3109,7 +3466,7 @@ TEST(APIThrowMessage) {
   LocalContext context(0, templ);
   CompileRun("ThrowFromC();");
   CHECK(message_received);
-  v8::V8::RemoveMessageListeners(check_message);
+  v8::V8::RemoveMessageListeners(receive_message);
 }
 
 
@@ -3127,7 +3484,7 @@ TEST(APIThrowMessageAndVerboseTryCatch) {
   CHECK(try_catch.HasCaught());
   CHECK(result.IsEmpty());
   CHECK(message_received);
-  v8::V8::RemoveMessageListeners(check_message);
+  v8::V8::RemoveMessageListeners(receive_message);
 }
 
 
@@ -3399,6 +3756,30 @@ THREADED_TEST(TryCatchAndFinally) {
 }
 
 
+static void TryCatchNestedHelper(int depth) {
+  if (depth > 0) {
+    v8::TryCatch try_catch;
+    try_catch.SetVerbose(true);
+    TryCatchNestedHelper(depth - 1);
+    CHECK(try_catch.HasCaught());
+    try_catch.ReThrow();
+  } else {
+    v8::ThrowException(v8_str("back"));
+  }
+}
+
+
+TEST(TryCatchNested) {
+  v8::V8::Initialize();
+  v8::HandleScope scope;
+  LocalContext context;
+  v8::TryCatch try_catch;
+  TryCatchNestedHelper(5);
+  CHECK(try_catch.HasCaught());
+  CHECK_EQ(0, strcmp(*v8::String::Utf8Value(try_catch.Exception()), "back"));
+}
+
+
 THREADED_TEST(Equality) {
   v8::HandleScope scope;
   LocalContext context;
@@ -5092,7 +5473,6 @@ TEST(RegexpOutOfMemory) {
 
 static void MissingScriptInfoMessageListener(v8::Handle<v8::Message> message,
                                              v8::Handle<Value> data) {
-  CHECK_EQ(v8::Undefined(), data);
   CHECK(message->GetScriptResourceName()->IsUndefined());
   CHECK_EQ(v8::Undefined(), message->GetScriptResourceName());
   message->GetLineNumber();
@@ -5204,18 +5584,28 @@ THREADED_TEST(IndependentWeakHandle) {
   v8::Persistent<Context> context = Context::New();
   Context::Scope context_scope(context);
 
-  v8::Persistent<v8::Object> object_a;
+  v8::Persistent<v8::Object> object_a, object_b;
 
   {
     v8::HandleScope handle_scope;
     object_a = v8::Persistent<v8::Object>::New(v8::Object::New());
+    object_b = v8::Persistent<v8::Object>::New(v8::Object::New());
   }
 
+  v8::Isolate* isolate = v8::Isolate::GetCurrent();
   bool object_a_disposed = false;
+  bool object_b_disposed = false;
   object_a.MakeWeak(&object_a_disposed, &DisposeAndSetFlag);
+  object_b.MakeWeak(&object_b_disposed, &DisposeAndSetFlag);
+  CHECK(!object_a.IsIndependent());
+  CHECK(!object_b.IsIndependent(isolate));
   object_a.MarkIndependent();
+  object_b.MarkIndependent(isolate);
+  CHECK(object_a.IsIndependent());
+  CHECK(object_b.IsIndependent(isolate));
   HEAP->PerformScavenge();
   CHECK(object_a_disposed);
+  CHECK(object_b_disposed);
 }
 
 
@@ -7739,12 +8129,8 @@ THREADED_TEST(ShadowObject) {
   Local<ObjectTemplate> proto = t->PrototypeTemplate();
   Local<ObjectTemplate> instance = t->InstanceTemplate();
 
-  // Only allow calls of f on instances of t.
-  Local<v8::Signature> signature = v8::Signature::New(t);
   proto->Set(v8_str("f"),
-             v8::FunctionTemplate::New(ShadowFunctionCallback,
-                                       Local<Value>(),
-                                       signature));
+             v8::FunctionTemplate::New(ShadowFunctionCallback, Local<Value>()));
   proto->Set(v8_str("x"), v8_num(12));
 
   instance->SetAccessor(v8_str("y"), ShadowYGetter, ShadowYSetter);
@@ -9609,6 +9995,7 @@ THREADED_TEST(InterceptorCallICFastApi_SimpleSignature) {
                                 v8::Signature::New(fun_templ));
   v8::Handle<v8::ObjectTemplate> proto_templ = fun_templ->PrototypeTemplate();
   proto_templ->Set(v8_str("method"), method_templ);
+  fun_templ->SetHiddenPrototype(true);
   v8::Handle<v8::ObjectTemplate> templ = fun_templ->InstanceTemplate();
   templ->SetNamedPropertyHandler(InterceptorCallICFastApi,
                                  NULL, NULL, NULL, NULL,
@@ -9639,6 +10026,7 @@ THREADED_TEST(InterceptorCallICFastApi_SimpleSignature_Miss1) {
                                 v8::Signature::New(fun_templ));
   v8::Handle<v8::ObjectTemplate> proto_templ = fun_templ->PrototypeTemplate();
   proto_templ->Set(v8_str("method"), method_templ);
+  fun_templ->SetHiddenPrototype(true);
   v8::Handle<v8::ObjectTemplate> templ = fun_templ->InstanceTemplate();
   templ->SetNamedPropertyHandler(InterceptorCallICFastApi,
                                  NULL, NULL, NULL, NULL,
@@ -9675,6 +10063,7 @@ THREADED_TEST(InterceptorCallICFastApi_SimpleSignature_Miss2) {
                                 v8::Signature::New(fun_templ));
   v8::Handle<v8::ObjectTemplate> proto_templ = fun_templ->PrototypeTemplate();
   proto_templ->Set(v8_str("method"), method_templ);
+  fun_templ->SetHiddenPrototype(true);
   v8::Handle<v8::ObjectTemplate> templ = fun_templ->InstanceTemplate();
   templ->SetNamedPropertyHandler(InterceptorCallICFastApi,
                                  NULL, NULL, NULL, NULL,
@@ -9711,6 +10100,7 @@ THREADED_TEST(InterceptorCallICFastApi_SimpleSignature_Miss3) {
                                 v8::Signature::New(fun_templ));
   v8::Handle<v8::ObjectTemplate> proto_templ = fun_templ->PrototypeTemplate();
   proto_templ->Set(v8_str("method"), method_templ);
+  fun_templ->SetHiddenPrototype(true);
   v8::Handle<v8::ObjectTemplate> templ = fun_templ->InstanceTemplate();
   templ->SetNamedPropertyHandler(InterceptorCallICFastApi,
                                  NULL, NULL, NULL, NULL,
@@ -9750,6 +10140,7 @@ THREADED_TEST(InterceptorCallICFastApi_SimpleSignature_TypeError) {
                                 v8::Signature::New(fun_templ));
   v8::Handle<v8::ObjectTemplate> proto_templ = fun_templ->PrototypeTemplate();
   proto_templ->Set(v8_str("method"), method_templ);
+  fun_templ->SetHiddenPrototype(true);
   v8::Handle<v8::ObjectTemplate> templ = fun_templ->InstanceTemplate();
   templ->SetNamedPropertyHandler(InterceptorCallICFastApi,
                                  NULL, NULL, NULL, NULL,
@@ -9812,6 +10203,7 @@ THREADED_TEST(CallICFastApi_SimpleSignature) {
                                 v8::Signature::New(fun_templ));
   v8::Handle<v8::ObjectTemplate> proto_templ = fun_templ->PrototypeTemplate();
   proto_templ->Set(v8_str("method"), method_templ);
+  fun_templ->SetHiddenPrototype(true);
   v8::Handle<v8::ObjectTemplate> templ(fun_templ->InstanceTemplate());
   CHECK(!templ.IsEmpty());
   LocalContext context;
@@ -9839,6 +10231,7 @@ THREADED_TEST(CallICFastApi_SimpleSignature_Miss1) {
                                 v8::Signature::New(fun_templ));
   v8::Handle<v8::ObjectTemplate> proto_templ = fun_templ->PrototypeTemplate();
   proto_templ->Set(v8_str("method"), method_templ);
+  fun_templ->SetHiddenPrototype(true);
   v8::Handle<v8::ObjectTemplate> templ(fun_templ->InstanceTemplate());
   CHECK(!templ.IsEmpty());
   LocalContext context;
@@ -9871,6 +10264,7 @@ THREADED_TEST(CallICFastApi_SimpleSignature_Miss2) {
                                 v8::Signature::New(fun_templ));
   v8::Handle<v8::ObjectTemplate> proto_templ = fun_templ->PrototypeTemplate();
   proto_templ->Set(v8_str("method"), method_templ);
+  fun_templ->SetHiddenPrototype(true);
   v8::Handle<v8::ObjectTemplate> templ(fun_templ->InstanceTemplate());
   CHECK(!templ.IsEmpty());
   LocalContext context;
@@ -9897,6 +10291,42 @@ THREADED_TEST(CallICFastApi_SimpleSignature_Miss2) {
   CHECK_EQ(42, context->Global()->Get(v8_str("saved_result"))->Int32Value());
 }
 
+THREADED_TEST(CallICFastApi_SimpleSignature_TypeError) {
+  v8::HandleScope scope;
+  v8::Handle<v8::FunctionTemplate> fun_templ = v8::FunctionTemplate::New();
+  v8::Handle<v8::FunctionTemplate> method_templ =
+      v8::FunctionTemplate::New(FastApiCallback_SimpleSignature,
+                                v8_str("method_data"),
+                                v8::Signature::New(fun_templ));
+  v8::Handle<v8::ObjectTemplate> proto_templ = fun_templ->PrototypeTemplate();
+  proto_templ->Set(v8_str("method"), method_templ);
+  fun_templ->SetHiddenPrototype(true);
+  v8::Handle<v8::ObjectTemplate> templ(fun_templ->InstanceTemplate());
+  CHECK(!templ.IsEmpty());
+  LocalContext context;
+  v8::Handle<v8::Function> fun = fun_templ->GetFunction();
+  GenerateSomeGarbage();
+  context->Global()->Set(v8_str("o"), fun->NewInstance());
+  v8::TryCatch try_catch;
+  CompileRun(
+      "o.foo = 17;"
+      "var receiver = {};"
+      "receiver.__proto__ = o;"
+      "var result = 0;"
+      "var saved_result = 0;"
+      "for (var i = 0; i < 100; i++) {"
+      "  result = receiver.method(41);"
+      "  if (i == 50) {"
+      "    saved_result = result;"
+      "    receiver = Object.create(receiver);"
+      "  }"
+      "}");
+  CHECK(try_catch.HasCaught());
+  CHECK_EQ(v8_str("TypeError: Illegal invocation"),
+           try_catch.Exception()->ToString());
+  CHECK_EQ(42, context->Global()->Get(v8_str("saved_result"))->Int32Value());
+}
+
 
 v8::Handle<Value> keyed_call_ic_function;
 
@@ -10824,18 +11254,21 @@ TEST(DontLeakGlobalObjects) {
     { v8::HandleScope scope;
       LocalContext context;
     }
+    v8::V8::ContextDisposedNotification();
     CheckSurvivingGlobalObjectsCount(0);
 
     { v8::HandleScope scope;
       LocalContext context;
       v8_compile("Date")->Run();
     }
+    v8::V8::ContextDisposedNotification();
     CheckSurvivingGlobalObjectsCount(0);
 
     { v8::HandleScope scope;
       LocalContext context;
       v8_compile("/aaa/")->Run();
     }
+    v8::V8::ContextDisposedNotification();
     CheckSurvivingGlobalObjectsCount(0);
 
     { v8::HandleScope scope;
@@ -10844,6 +11277,7 @@ TEST(DontLeakGlobalObjects) {
       LocalContext context(&extensions);
       v8_compile("gc();")->Run();
     }
+    v8::V8::ContextDisposedNotification();
     CheckSurvivingGlobalObjectsCount(0);
   }
 }
@@ -11044,6 +11478,7 @@ static void RunLoopInNewEnv() {
 
 TEST(SetFunctionEntryHook) {
   i::FLAG_allow_natives_syntax = true;
+  i::FLAG_use_inlining = false;
 
   // Test setting and resetting the entry hook.
   // Nulling it should always succeed.
@@ -11176,10 +11611,6 @@ static void event_handler(const v8::JitCodeEvent* event) {
 }
 
 
-// Implemented in the test-alloc.cc test suite.
-void SimulateFullSpace(i::PagedSpace* space);
-
-
 static bool MatchPointers(void* key1, void* key2) {
   return key1 == key2;
 }
@@ -12301,7 +12732,7 @@ static void MorphAString(i::String* string,
                          AsciiVectorResource* ascii_resource,
                          UC16VectorResource* uc16_resource) {
   CHECK(i::StringShape(string).IsExternal());
-  if (string->IsAsciiRepresentation()) {
+  if (string->IsOneByteRepresentation()) {
     // Check old map is not symbol or long.
     CHECK(string->map() == HEAP->external_ascii_string_map());
     // Morph external string to be TwoByte string.
@@ -14436,6 +14867,89 @@ TEST(SourceURLInStackTrace) {
 }
 
 
+v8::Handle<Value> AnalyzeStackOfInlineScriptWithSourceURL(
+    const v8::Arguments& args) {
+  v8::HandleScope scope;
+  v8::Handle<v8::StackTrace> stackTrace =
+      v8::StackTrace::CurrentStackTrace(10, v8::StackTrace::kDetailed);
+  CHECK_EQ(4, stackTrace->GetFrameCount());
+  v8::Handle<v8::String> url = v8_str("url");
+  for (int i = 0; i < 3; i++) {
+    v8::Handle<v8::String> name =
+        stackTrace->GetFrame(i)->GetScriptNameOrSourceURL();
+    CHECK(!name.IsEmpty());
+    CHECK_EQ(url, name);
+  }
+  return v8::Undefined();
+}
+
+
+TEST(InlineScriptWithSourceURLInStackTrace) {
+  v8::HandleScope scope;
+  Local<ObjectTemplate> templ = ObjectTemplate::New();
+  templ->Set(v8_str("AnalyzeStackOfInlineScriptWithSourceURL"),
+             v8::FunctionTemplate::New(
+                 AnalyzeStackOfInlineScriptWithSourceURL));
+  LocalContext context(0, templ);
+
+  const char *source =
+    "function outer() {\n"
+    "function bar() {\n"
+    "  AnalyzeStackOfInlineScriptWithSourceURL();\n"
+    "}\n"
+    "function foo() {\n"
+    "\n"
+    "  bar();\n"
+    "}\n"
+    "foo();\n"
+    "}\n"
+    "outer()\n"
+    "//@ sourceURL=source_url";
+  CHECK(CompileRunWithOrigin(source, "url", 0, 1)->IsUndefined());
+}
+
+
+v8::Handle<Value> AnalyzeStackOfDynamicScriptWithSourceURL(
+    const v8::Arguments& args) {
+  v8::HandleScope scope;
+  v8::Handle<v8::StackTrace> stackTrace =
+      v8::StackTrace::CurrentStackTrace(10, v8::StackTrace::kDetailed);
+  CHECK_EQ(4, stackTrace->GetFrameCount());
+  v8::Handle<v8::String> url = v8_str("source_url");
+  for (int i = 0; i < 3; i++) {
+    v8::Handle<v8::String> name =
+        stackTrace->GetFrame(i)->GetScriptNameOrSourceURL();
+    CHECK(!name.IsEmpty());
+    CHECK_EQ(url, name);
+  }
+  return v8::Undefined();
+}
+
+
+TEST(DynamicWithSourceURLInStackTrace) {
+  v8::HandleScope scope;
+  Local<ObjectTemplate> templ = ObjectTemplate::New();
+  templ->Set(v8_str("AnalyzeStackOfDynamicScriptWithSourceURL"),
+             v8::FunctionTemplate::New(
+                 AnalyzeStackOfDynamicScriptWithSourceURL));
+  LocalContext context(0, templ);
+
+  const char *source =
+    "function outer() {\n"
+    "function bar() {\n"
+    "  AnalyzeStackOfDynamicScriptWithSourceURL();\n"
+    "}\n"
+    "function foo() {\n"
+    "\n"
+    "  bar();\n"
+    "}\n"
+    "foo();\n"
+    "}\n"
+    "outer()\n"
+    "//@ sourceURL=source_url";
+  CHECK(CompileRunWithOrigin(source, "url", 0, 0)->IsUndefined());
+}
+
 static void CreateGarbageInOldSpace() {
   v8::HandleScope scope;
   i::AlwaysAllocateScope always_allocate;
@@ -14623,11 +15137,12 @@ THREADED_TEST(GetHeapStatistics) {
 
 class VisitorImpl : public v8::ExternalResourceVisitor {
  public:
-  VisitorImpl(TestResource* r1, TestResource* r2)
-      : resource1_(r1),
-        resource2_(r2),
-        found_resource1_(false),
-        found_resource2_(false) {}
+  explicit VisitorImpl(TestResource** resource) {
+    for (int i = 0; i < 4; i++) {
+      resource_[i] = resource[i];
+      found_resource_[i] = false;
+    }
+  }
   virtual ~VisitorImpl() {}
   virtual void VisitExternalString(v8::Handle<v8::String> string) {
     if (!string->IsExternal()) {
@@ -14637,25 +15152,22 @@ class VisitorImpl : public v8::ExternalResourceVisitor {
     v8::String::ExternalStringResource* resource =
         string->GetExternalStringResource();
     CHECK(resource);
-    if (resource1_ == resource) {
-      CHECK(!found_resource1_);
-      found_resource1_ = true;
-    }
-    if (resource2_ == resource) {
-      CHECK(!found_resource2_);
-      found_resource2_ = true;
+    for (int i = 0; i < 4; i++) {
+      if (resource_[i] == resource) {
+        CHECK(!found_resource_[i]);
+        found_resource_[i] = true;
+      }
     }
   }
   void CheckVisitedResources() {
-    CHECK(found_resource1_);
-    CHECK(found_resource2_);
+    for (int i = 0; i < 4; i++) {
+      CHECK(found_resource_[i]);
+    }
   }
 
  private:
-  v8::String::ExternalStringResource* resource1_;
-  v8::String::ExternalStringResource* resource2_;
-  bool found_resource1_;
-  bool found_resource2_;
+  v8::String::ExternalStringResource* resource_[4];
+  bool found_resource_[4];
 };
 
 TEST(VisitExternalStrings) {
@@ -14663,16 +15175,33 @@ TEST(VisitExternalStrings) {
   LocalContext env;
   const char* string = "Some string";
   uint16_t* two_byte_string = AsciiToTwoByteString(string);
-  TestResource* resource1 = new TestResource(two_byte_string);
-  v8::Local<v8::String> string1 = v8::String::NewExternal(resource1);
-  TestResource* resource2 = new TestResource(two_byte_string);
-  v8::Local<v8::String> string2 = v8::String::NewExternal(resource2);
-
-  // We need to add usages for string1 and string2 to avoid warnings in GCC 4.7
+  TestResource* resource[4];
+  resource[0] = new TestResource(two_byte_string);
+  v8::Local<v8::String> string0 = v8::String::NewExternal(resource[0]);
+  resource[1] = new TestResource(two_byte_string);
+  v8::Local<v8::String> string1 = v8::String::NewExternal(resource[1]);
+
+  // Externalized symbol.
+  resource[2] = new TestResource(two_byte_string);
+  v8::Local<v8::String> string2 = v8::String::NewSymbol(string);
+  CHECK(string2->MakeExternal(resource[2]));
+
+  // Symbolized External.
+  resource[3] = new TestResource(AsciiToTwoByteString("Some other string"));
+  v8::Local<v8::String> string3 = v8::String::NewExternal(resource[3]);
+  HEAP->CollectAllAvailableGarbage();  // Tenure string.
+  // Turn into a symbol.
+  i::Handle<i::String> string3_i = v8::Utils::OpenHandle(*string3);
+  CHECK(!HEAP->LookupSymbol(*string3_i)->IsFailure());
+  CHECK(string3_i->IsSymbol());
+
+  // We need to add usages for string* to avoid warnings in GCC 4.7
+  CHECK(string0->IsExternal());
   CHECK(string1->IsExternal());
   CHECK(string2->IsExternal());
+  CHECK(string3->IsExternal());
 
-  VisitorImpl visitor(resource1, resource2);
+  VisitorImpl visitor(resource);
   v8::V8::VisitExternalResources(&visitor);
   visitor.CheckVisitedResources();
 }
@@ -14907,6 +15436,7 @@ TEST(Regress528) {
     context->Exit();
   }
   context.Dispose();
+  v8::V8::ContextDisposedNotification();
   for (gc_count = 1; gc_count < 10; gc_count++) {
     other_context->Enter();
     CompileRun(source_exception);
@@ -15361,13 +15891,13 @@ THREADED_TEST(TwoByteStringInAsciiCons) {
   CHECK(result->IsString());
   i::Handle<i::String> string = v8::Utils::OpenHandle(String::Cast(*result));
   int length = string->length();
-  CHECK(string->IsAsciiRepresentation());
+  CHECK(string->IsOneByteRepresentation());
 
   FlattenString(string);
   i::Handle<i::String> flat_string = FlattenGetString(string);
 
-  CHECK(string->IsAsciiRepresentation());
-  CHECK(flat_string->IsAsciiRepresentation());
+  CHECK(string->IsOneByteRepresentation());
+  CHECK(flat_string->IsOneByteRepresentation());
 
   // Create external resource.
   uint16_t* uc16_buffer = new uint16_t[length + 1];
@@ -15386,7 +15916,7 @@ THREADED_TEST(TwoByteStringInAsciiCons) {
   // ASCII characters). This is a valid sequence of steps, and it can happen
   // in real pages.
 
-  CHECK(string->IsAsciiRepresentation());
+  CHECK(string->IsOneByteRepresentation());
   i::ConsString* cons = i::ConsString::cast(*string);
   CHECK_EQ(0, cons->second()->length());
   CHECK(cons->first()->IsTwoByteRepresentation());
@@ -16073,6 +16603,45 @@ TEST(DontDeleteCellLoadICAPI) {
 }
 
 
+class Visitor42 : public v8::PersistentHandleVisitor {
+ public:
+  explicit Visitor42(v8::Persistent<v8::Object> object)
+      : counter_(0), object_(object) { }
+
+  virtual void VisitPersistentHandle(Persistent<Value> value,
+                                     uint16_t class_id) {
+    if (class_id == 42) {
+      CHECK(value->IsObject());
+      v8::Persistent<v8::Object> visited =
+          v8::Persistent<v8::Object>::Cast(value);
+      CHECK_EQ(42, visited.WrapperClassId());
+      CHECK_EQ(object_, visited);
+      ++counter_;
+    }
+  }
+
+  int counter_;
+  v8::Persistent<v8::Object> object_;
+};
+
+
+TEST(PersistentHandleVisitor) {
+  v8::HandleScope scope;
+  LocalContext context;
+  v8::Persistent<v8::Object> object =
+      v8::Persistent<v8::Object>::New(v8::Object::New());
+  CHECK_EQ(0, object.WrapperClassId());
+  object.SetWrapperClassId(42);
+  CHECK_EQ(42, object.WrapperClassId());
+
+  Visitor42 visitor(object);
+  v8::V8::VisitHandlesWithClassIds(&visitor);
+  CHECK_EQ(1, visitor.counter_);
+
+  object.Dispose();
+}
+
+
 TEST(RegExp) {
   v8::HandleScope scope;
   LocalContext context;
@@ -16508,6 +17077,24 @@ THREADED_TEST(AllowCodeGenFromStrings) {
 }
 
 
+TEST(SetErrorMessageForCodeGenFromStrings) {
+  v8::HandleScope scope;
+  LocalContext context;
+  TryCatch try_catch;
+
+  Handle<String> message = v8_str("Message") ;
+  Handle<String> expected_message = v8_str("Uncaught EvalError: Message");
+  V8::SetAllowCodeGenerationFromStringsCallback(&CodeGenerationDisallowed);
+  context->AllowCodeGenerationFromStrings(false);
+  context->SetErrorMessageForCodeGenerationFromStrings(message);
+  Handle<Value> result = CompileRun("eval('42')");
+  CHECK(result.IsEmpty());
+  CHECK(try_catch.HasCaught());
+  Handle<String> actual_message = try_catch.Message()->Get();
+  CHECK(expected_message->Equals(actual_message));
+}
+
+
 static v8::Handle<Value> NonObjectThis(const v8::Arguments& args) {
   return v8::Undefined();
 }
@@ -17445,6 +18032,16 @@ THREADED_TEST(Regress149912) {
 }
 
 
+THREADED_TEST(Regress157124) {
+  v8::HandleScope scope;
+  LocalContext context;
+  Local<ObjectTemplate> templ = ObjectTemplate::New();
+  Local<Object> obj = templ->NewInstance();
+  obj->GetIdentityHash();
+  obj->DeleteHiddenValue(v8_str("Bug"));
+}
+
+
 #ifndef WIN32
 class ThreadInterruptTest {
  public:
@@ -17496,7 +18093,6 @@ class ThreadInterruptTest {
 
    private:
      ThreadInterruptTest* test_;
-     struct sigaction sa_;
   };
 
   i::Semaphore* sem_;
diff --git a/deps/v8/test/cctest/test-assembler-arm.cc b/deps/v8/test/cctest/test-assembler-arm.cc
index cdab1b95ce..adec13b662 100644
--- a/deps/v8/test/cctest/test-assembler-arm.cc
+++ b/deps/v8/test/cctest/test-assembler-arm.cc
@@ -259,6 +259,8 @@ TEST(4) {
     __ vadd(d5, d6, d7);
     __ vstr(d5, r4, OFFSET_OF(T, c));
 
+    __ vmla(d5, d6, d7);
+
     __ vmov(r2, r3, d5);
     __ vmov(d4, r2, r3);
     __ vstr(d4, r4, OFFSET_OF(T, b));
@@ -347,7 +349,7 @@ TEST(4) {
     CHECK_EQ(1.0, t.e);
     CHECK_EQ(1.000000059604644775390625, t.d);
     CHECK_EQ(4.25, t.c);
-    CHECK_EQ(4.25, t.b);
+    CHECK_EQ(8.375, t.b);
     CHECK_EQ(1.5, t.a);
   }
 }
diff --git a/deps/v8/test/cctest/test-compiler.cc b/deps/v8/test/cctest/test-compiler.cc
index 961c94bff0..807adbf7f4 100644
--- a/deps/v8/test/cctest/test-compiler.cc
+++ b/deps/v8/test/cctest/test-compiler.cc
@@ -68,15 +68,9 @@ v8::Handle<v8::Value> PrintExtension::Print(const v8::Arguments& args) {
   for (int i = 0; i < args.Length(); i++) {
     if (i != 0) printf(" ");
     v8::HandleScope scope;
-    v8::Handle<v8::Value> arg = args[i];
-    v8::Handle<v8::String> string_obj = arg->ToString();
-    if (string_obj.IsEmpty()) return string_obj;
-    int length = string_obj->Length();
-    uint16_t* string = NewArray<uint16_t>(length + 1);
-    string_obj->Write(string);
-    for (int j = 0; j < length; j++)
-      printf("%lc", static_cast<wchar_t>(string[j]));
-    DeleteArray(string);
+    v8::String::Utf8Value str(args[i]);
+    if (*str == NULL) return v8::Undefined();
+    printf("%s", *str);
   }
   printf("\n");
   return v8::Undefined();
@@ -106,10 +100,11 @@ static MaybeObject* GetGlobalProperty(const char* name) {
 
 
 static void SetGlobalProperty(const char* name, Object* value) {
+  Isolate* isolate = Isolate::Current();
   Handle<Object> object(value);
   Handle<String> symbol = FACTORY->LookupAsciiSymbol(name);
   Handle<JSObject> global(Isolate::Current()->context()->global_object());
-  SetProperty(global, symbol, object, NONE, kNonStrictMode);
+  SetProperty(isolate, global, symbol, object, NONE, kNonStrictMode);
 }
 
 
diff --git a/deps/v8/test/cctest/test-debug.cc b/deps/v8/test/cctest/test-debug.cc
index 234b6df722..941fa688d5 100644
--- a/deps/v8/test/cctest/test-debug.cc
+++ b/deps/v8/test/cctest/test-debug.cc
@@ -27,6 +27,9 @@
 
 #ifdef ENABLE_DEBUGGER_SUPPORT
 
+// TODO(svenpanne): Do not use Context::GetData and Context::SetData.
+#define V8_DISABLE_DEPRECATIONS 1
+
 #include <stdlib.h>
 
 #include "v8.h"
@@ -143,7 +146,8 @@ class DebugLocalContext {
   inline v8::Context* operator*() { return *context_; }
   inline bool IsReady() { return !context_.IsEmpty(); }
   void ExposeDebug() {
-    v8::internal::Debug* debug = v8::internal::Isolate::Current()->debug();
+    v8::internal::Isolate* isolate = v8::internal::Isolate::Current();
+    v8::internal::Debug* debug = isolate->debug();
     // Expose the debug context global object in the global object for testing.
     debug->Load();
     debug->debug_context()->set_security_token(
@@ -153,7 +157,7 @@ class DebugLocalContext {
         v8::Utils::OpenHandle(*context_->Global())));
     Handle<v8::internal::String> debug_string =
         FACTORY->LookupAsciiSymbol("debug");
-    SetProperty(global, debug_string,
+    SetProperty(isolate, global, debug_string,
         Handle<Object>(debug->debug_context()->global_proxy()), DONT_ENUM,
         ::v8::internal::kNonStrictMode);
   }
@@ -2381,7 +2385,7 @@ TEST(DebuggerStatementBreakpoint) {
 }
 
 
-// Thest that the evaluation of expressions when a break point is hit generates
+// Test that the evaluation of expressions when a break point is hit generates
 // the correct results.
 TEST(DebugEvaluate) {
   v8::HandleScope scope;
@@ -2497,6 +2501,98 @@ TEST(DebugEvaluate) {
   CheckDebuggerUnloaded();
 }
 
+
+int debugEventCount = 0;
+static void CheckDebugEvent(const v8::Debug::EventDetails& eventDetails) {
+  if (eventDetails.GetEvent() == v8::Break) ++debugEventCount;
+}
+
+// Test that the conditional breakpoints work event if code generation from
+// strings is prohibited in the debugee context.
+TEST(ConditionalBreakpointWithCodeGenerationDisallowed) {
+  v8::HandleScope scope;
+  DebugLocalContext env;
+  env.ExposeDebug();
+
+  v8::Debug::SetDebugEventListener2(CheckDebugEvent);
+
+  v8::Local<v8::Function> foo = CompileFunction(&env,
+    "function foo(x) {\n"
+    "  var s = 'String value2';\n"
+    "  return s + x;\n"
+    "}",
+    "foo");
+
+  // Set conditional breakpoint with condition 'true'.
+  CompileRun("debug.Debug.setBreakPoint(foo, 2, 0, 'true')");
+
+  debugEventCount = 0;
+  env->AllowCodeGenerationFromStrings(false);
+  foo->Call(env->Global(), 0, NULL);
+  CHECK_EQ(1, debugEventCount);
+
+  v8::Debug::SetDebugEventListener2(NULL);
+  CheckDebuggerUnloaded();
+}
+
+
+bool checkedDebugEvals = true;
+v8::Handle<v8::Function> checkGlobalEvalFunction;
+v8::Handle<v8::Function> checkFrameEvalFunction;
+static void CheckDebugEval(const v8::Debug::EventDetails& eventDetails) {
+  if (eventDetails.GetEvent() == v8::Break) {
+    ++debugEventCount;
+    v8::HandleScope handleScope;
+
+    v8::Handle<v8::Value> args[] = { eventDetails.GetExecutionState() };
+    CHECK(checkGlobalEvalFunction->Call(
+        eventDetails.GetEventContext()->Global(), 1, args)->IsTrue());
+    CHECK(checkFrameEvalFunction->Call(
+        eventDetails.GetEventContext()->Global(), 1, args)->IsTrue());
+  }
+}
+
+// Test that the evaluation of expressions when a break point is hit generates
+// the correct results in case code generation from strings is disallowed in the
+// debugee context.
+TEST(DebugEvaluateWithCodeGenerationDisallowed) {
+  v8::HandleScope scope;
+  DebugLocalContext env;
+  env.ExposeDebug();
+
+  v8::Debug::SetDebugEventListener2(CheckDebugEval);
+
+  v8::Local<v8::Function> foo = CompileFunction(&env,
+    "var global = 'Global';\n"
+    "function foo(x) {\n"
+    "  var local = 'Local';\n"
+    "  debugger;\n"
+    "  return local + x;\n"
+    "}",
+    "foo");
+  checkGlobalEvalFunction = CompileFunction(&env,
+    "function checkGlobalEval(exec_state) {\n"
+    "  return exec_state.evaluateGlobal('global').value() === 'Global';\n"
+    "}",
+    "checkGlobalEval");
+
+  checkFrameEvalFunction = CompileFunction(&env,
+    "function checkFrameEval(exec_state) {\n"
+    "  return exec_state.frame(0).evaluate('local').value() === 'Local';\n"
+    "}",
+    "checkFrameEval");
+  debugEventCount = 0;
+  env->AllowCodeGenerationFromStrings(false);
+  foo->Call(env->Global(), 0, NULL);
+  CHECK_EQ(1, debugEventCount);
+
+  checkGlobalEvalFunction.Clear();
+  checkFrameEvalFunction.Clear();
+  v8::Debug::SetDebugEventListener2(NULL);
+  CheckDebuggerUnloaded();
+}
+
+
 // Copies a C string to a 16-bit string.  Does not check for buffer overflow.
 // Does not use the V8 engine to convert strings, so it can be used
 // in any thread.  Returns the length of the string.
@@ -4026,15 +4122,12 @@ TEST(StepWithException) {
 
 
 TEST(DebugBreak) {
+#ifdef VERIFY_HEAP
+  i::FLAG_verify_heap = true;
+#endif
   v8::HandleScope scope;
   DebugLocalContext env;
 
-  // This test should be run with option --verify-heap. As --verify-heap is
-  // only available in debug mode only check for it in that case.
-#ifdef DEBUG
-  CHECK(v8::internal::FLAG_verify_heap);
-#endif
-
   // Register a debug event listener which sets the break flag and counts.
   v8::Debug::SetDebugEventListener(DebugEventBreak);
 
@@ -5833,9 +5926,9 @@ TEST(DebuggerAgent) {
   i::Debugger* debugger = i::Isolate::Current()->debugger();
   // Make sure these ports is not used by other tests to allow tests to run in
   // parallel.
-  const int kPort1 = 5858;
-  const int kPort2 = 5857;
-  const int kPort3 = 5856;
+  const int kPort1 = 5858 + FlagDependentPortOffset();
+  const int kPort2 = 5857 + FlagDependentPortOffset();
+  const int kPort3 = 5856 + FlagDependentPortOffset();
 
   // Make a string with the port2 number.
   const int kPortBufferLen = 6;
@@ -5934,7 +6027,7 @@ void DebuggerAgentProtocolServerThread::Run() {
 TEST(DebuggerAgentProtocolOverflowHeader) {
   // Make sure this port is not used by other tests to allow tests to run in
   // parallel.
-  const int kPort = 5860;
+  const int kPort = 5860 + FlagDependentPortOffset();
   static const char* kLocalhost = "localhost";
 
   // Make a string with the port number.
diff --git a/deps/v8/test/cctest/test-decls.cc b/deps/v8/test/cctest/test-decls.cc
index 6fc601213c..824c4e764a 100644
--- a/deps/v8/test/cctest/test-decls.cc
+++ b/deps/v8/test/cctest/test-decls.cc
@@ -190,7 +190,8 @@ v8::Handle<Integer> DeclarationContext::HandleQuery(Local<String> key,
 
 
 DeclarationContext* DeclarationContext::GetInstance(const AccessorInfo& info) {
-  return static_cast<DeclarationContext*>(External::Unwrap(info.Data()));
+  void* value = External::Cast(*info.Data())->Value();
+  return static_cast<DeclarationContext*>(value);
 }
 
 
@@ -734,7 +735,7 @@ class SimpleContext {
 };
 
 
-TEST(MultiScriptConflicts) {
+TEST(CrossScriptReferences) {
   HandleScope scope;
 
   { SimpleContext context;
@@ -772,135 +773,70 @@ TEST(MultiScriptConflicts) {
     context.Check("function x() { return 7 }; x",
                   EXPECT_EXCEPTION);
   }
+}
+
 
+TEST(CrossScriptReferencesHarmony) {
   i::FLAG_use_strict = true;
   i::FLAG_harmony_scoping = true;
+  i::FLAG_harmony_modules = true;
 
-  { SimpleContext context;
-    context.Check("var x = 1; x",
-                  EXPECT_RESULT, Number::New(1));
-    context.Check("x",
-                  EXPECT_RESULT, Number::New(1));
-    context.Check("this.x",
-                  EXPECT_RESULT, Number::New(1));
-  }
-
-  { SimpleContext context;
-    context.Check("function x() { return 4 }; x()",
-                  EXPECT_RESULT, Number::New(4));
-    context.Check("x()",
-                  EXPECT_RESULT, Number::New(4));
-    context.Check("this.x()",
-                  EXPECT_RESULT, Number::New(4));
-  }
+  HandleScope scope;
 
-  { SimpleContext context;
-    context.Check("let x = 2; x",
-                  EXPECT_RESULT, Number::New(2));
-    context.Check("x",
-                  EXPECT_RESULT, Number::New(2));
-    // TODO(rossberg): The current ES6 draft spec does not reflect lexical
-    // bindings on the global object. However, this will probably change, in
-    // which case we reactivate the following test.
-    // context.Check("this.x",
-    //               EXPECT_RESULT, Number::New(2));
-  }
+  const char* decs[] = {
+    "var x = 1; x", "x", "this.x",
+    "function x() { return 1 }; x()", "x()", "this.x()",
+    "let x = 1; x", "x", "this.x",
+    "const x = 1; x", "x", "this.x",
+    "module x { export let a = 1 }; x.a", "x.a", "this.x.a",
+    NULL
+  };
 
-  { SimpleContext context;
-    context.Check("const x = 3; x",
-                  EXPECT_RESULT, Number::New(3));
-    context.Check("x",
-                  EXPECT_RESULT, Number::New(3));
+  for (int i = 0; decs[i] != NULL; i += 3) {
+    SimpleContext context;
+    context.Check(decs[i], EXPECT_RESULT, Number::New(1));
+    context.Check(decs[i+1], EXPECT_RESULT, Number::New(1));
     // TODO(rossberg): The current ES6 draft spec does not reflect lexical
     // bindings on the global object. However, this will probably change, in
     // which case we reactivate the following test.
-    // context.Check("this.x",
-    //              EXPECT_RESULT, Number::New(3));
-  }
-
-  // TODO(rossberg): All of the below should actually be errors in Harmony.
-
-  { SimpleContext context;
-    context.Check("var x = 1; x",
-                  EXPECT_RESULT, Number::New(1));
-    context.Check("let x = 2; x",
-                  EXPECT_RESULT, Number::New(2));
-  }
-
-  { SimpleContext context;
-    context.Check("var x = 1; x",
-                  EXPECT_RESULT, Number::New(1));
-    context.Check("const x = 2; x",
-                  EXPECT_RESULT, Number::New(2));
-  }
-
-  { SimpleContext context;
-    context.Check("function x() { return 1 }; x()",
-                  EXPECT_RESULT, Number::New(1));
-    context.Check("let x = 2; x",
-                  EXPECT_RESULT, Number::New(2));
-  }
-
-  { SimpleContext context;
-    context.Check("function x() { return 1 }; x()",
-                  EXPECT_RESULT, Number::New(1));
-    context.Check("const x = 2; x",
-                  EXPECT_RESULT, Number::New(2));
-  }
-
-  { SimpleContext context;
-    context.Check("let x = 1; x",
-                  EXPECT_RESULT, Number::New(1));
-    context.Check("var x = 2; x",
-                  EXPECT_ERROR);
-  }
-
-  { SimpleContext context;
-    context.Check("let x = 1; x",
-                  EXPECT_RESULT, Number::New(1));
-    context.Check("let x = 2; x",
-                  EXPECT_ERROR);
-  }
-
-  { SimpleContext context;
-    context.Check("let x = 1; x",
-                  EXPECT_RESULT, Number::New(1));
-    context.Check("const x = 2; x",
-                  EXPECT_ERROR);
+    if (i/3 < 2) context.Check(decs[i+2], EXPECT_RESULT, Number::New(1));
   }
+}
 
-  { SimpleContext context;
-    context.Check("let x = 1; x",
-                  EXPECT_RESULT, Number::New(1));
-    context.Check("function x() { return 2 }; x()",
-                  EXPECT_ERROR);
-  }
 
-  { SimpleContext context;
-    context.Check("const x = 1; x",
-                  EXPECT_RESULT, Number::New(1));
-    context.Check("var x = 2; x",
-                  EXPECT_ERROR);
-  }
+TEST(CrossScriptConflicts) {
+  i::FLAG_use_strict = true;
+  i::FLAG_harmony_scoping = true;
+  i::FLAG_harmony_modules = true;
 
-  { SimpleContext context;
-    context.Check("const x = 1; x",
-                  EXPECT_RESULT, Number::New(1));
-    context.Check("let x = 2; x",
-                  EXPECT_ERROR);
-  }
+  HandleScope scope;
 
-  { SimpleContext context;
-    context.Check("const x = 1; x",
-                  EXPECT_RESULT, Number::New(1));
-    context.Check("const x = 2; x",
-                  EXPECT_ERROR);
-  }
+  const char* firsts[] = {
+    "var x = 1; x",
+    "function x() { return 1 }; x()",
+    "let x = 1; x",
+    "const x = 1; x",
+    "module x { export let a = 1 }; x.a",
+    NULL
+  };
+  const char* seconds[] = {
+    "var x = 2; x",
+    "function x() { return 2 }; x()",
+    "let x = 2; x",
+    "const x = 2; x",
+    "module x { export let a = 2 }; x.a",
+    NULL
+  };
 
-  { SimpleContext context;
-    context.Check("const x = 1; x",
-                  EXPECT_RESULT, Number::New(1));
-    context.Check("function x() { return 2 }; x()",
-                  EXPECT_ERROR);
+  for (int i = 0; firsts[i] != NULL; ++i) {
+    for (int j = 0; seconds[j] != NULL; ++j) {
+      SimpleContext context;
+      context.Check(firsts[i], EXPECT_RESULT, Number::New(1));
+      // TODO(rossberg): All tests should actually be errors in Harmony,
+      // but we currently do not detect the cases where the first declaration
+      // is not lexical.
+      context.Check(seconds[j],
+                    i < 2 ? EXPECT_RESULT : EXPECT_ERROR, Number::New(2));
+    }
   }
 }
diff --git a/deps/v8/test/cctest/test-dictionary.cc b/deps/v8/test/cctest/test-dictionary.cc
index 00e38333fc..2acd4e664e 100644
--- a/deps/v8/test/cctest/test-dictionary.cc
+++ b/deps/v8/test/cctest/test-dictionary.cc
@@ -114,7 +114,8 @@ TEST(ObjectHashSetCausesGC) {
 
   // Simulate a full heap so that generating an identity hash code
   // in subsequent calls will request GC.
-  FLAG_gc_interval = 0;
+  SimulateFullSpace(HEAP->new_space());
+  SimulateFullSpace(HEAP->old_pointer_space());
 
   // Calling Contains() should not cause GC ever.
   CHECK(!table->Contains(*key));
@@ -143,7 +144,8 @@ TEST(ObjectHashTableCausesGC) {
 
   // Simulate a full heap so that generating an identity hash code
   // in subsequent calls will request GC.
-  FLAG_gc_interval = 0;
+  SimulateFullSpace(HEAP->new_space());
+  SimulateFullSpace(HEAP->old_pointer_space());
 
   // Calling Lookup() should not cause GC ever.
   CHECK(table->Lookup(*key)->IsTheHole());
diff --git a/deps/v8/test/cctest/test-disasm-arm.cc b/deps/v8/test/cctest/test-disasm-arm.cc
index 3a2d9e8361..0ac3c5a946 100644
--- a/deps/v8/test/cctest/test-disasm-arm.cc
+++ b/deps/v8/test/cctest/test-disasm-arm.cc
@@ -547,6 +547,11 @@ TEST(Vfp) {
             "ec860a20       vstmia r6, {s0-s31}");
     COMPARE(vldm(ia, r7, s0, s31),
             "ec970a20       vldmia r7, {s0-s31}");
+
+    COMPARE(vmla(d2, d1, d0),
+            "ee012b00       vmla.f64 d2, d1, d0");
+    COMPARE(vmla(d6, d4, d5, cc),
+            "3e046b05       vmla.f64cc d6, d4, d5");
   }
 
   VERIFY_RUN();
@@ -753,4 +758,3 @@ TEST(LoadStore) {
 
   VERIFY_RUN();
 }
-
diff --git a/deps/v8/test/cctest/test-heap-profiler.cc b/deps/v8/test/cctest/test-heap-profiler.cc
index 1004104dd9..4a65344aa8 100644
--- a/deps/v8/test/cctest/test-heap-profiler.cc
+++ b/deps/v8/test/cctest/test-heap-profiler.cc
@@ -1015,7 +1015,6 @@ class TestRetainedObjectInfo : public v8::RetainedObjectInfo {
 
  private:
   bool disposed_;
-  int category_;
   int hash_;
   const char* group_label_;
   const char* label_;
@@ -1228,6 +1227,33 @@ TEST(DeleteHeapSnapshot) {
 }
 
 
+class NameResolver : public v8::HeapProfiler::ObjectNameResolver {
+ public:
+  virtual const char* GetName(v8::Handle<v8::Object> object) {
+    return "Global object name";
+  }
+};
+
+TEST(GlobalObjectName) {
+  v8::HandleScope scope;
+  LocalContext env;
+
+  CompileRun("document = { URL:\"abcdefgh\" };");
+
+  NameResolver name_resolver;
+  const v8::HeapSnapshot* snapshot =
+      v8::HeapProfiler::TakeSnapshot(v8_str("document"),
+      v8::HeapSnapshot::kFull,
+      NULL,
+      &name_resolver);
+  const v8::HeapGraphNode* global = GetGlobalObject(snapshot);
+  CHECK_NE(NULL, global);
+  CHECK_EQ("Object / Global object name" ,
+           const_cast<i::HeapEntry*>(
+               reinterpret_cast<const i::HeapEntry*>(global))->name());
+}
+
+
 TEST(DocumentURL) {
   v8::HandleScope scope;
   LocalContext env;
@@ -1670,13 +1696,14 @@ TEST(MapHasDescriptorsAndTransitions) {
   const v8::HeapGraphNode* global_object =
       GetProperty(global, v8::HeapGraphEdge::kProperty, "obj");
   CHECK_NE(NULL, global_object);
+
   const v8::HeapGraphNode* map =
       GetProperty(global_object, v8::HeapGraphEdge::kInternal, "map");
   CHECK_NE(NULL, map);
-  const v8::HeapGraphNode* descriptors =
-      GetProperty(map, v8::HeapGraphEdge::kInternal, "descriptors");
-  CHECK_NE(NULL, descriptors);
-  const v8::HeapGraphNode* transitions =
-      GetProperty(map, v8::HeapGraphEdge::kInternal, "transitions");
-  CHECK_NE(NULL, transitions);
+  const v8::HeapGraphNode* own_descriptors = GetProperty(
+      map, v8::HeapGraphEdge::kInternal, "descriptors");
+  CHECK_NE(NULL, own_descriptors);
+  const v8::HeapGraphNode* own_transitions = GetProperty(
+      map, v8::HeapGraphEdge::kInternal, "transitions");
+  CHECK_EQ(NULL, own_transitions);
 }
diff --git a/deps/v8/test/cctest/test-heap.cc b/deps/v8/test/cctest/test-heap.cc
index 64ceccf806..93ac211687 100644
--- a/deps/v8/test/cctest/test-heap.cc
+++ b/deps/v8/test/cctest/test-heap.cc
@@ -23,6 +23,21 @@ static void InitializeVM() {
 }
 
 
+// Go through all incremental marking steps in one swoop.
+static void SimulateIncrementalMarking() {
+  IncrementalMarking* marking = HEAP->incremental_marking();
+  CHECK(marking->IsMarking() || marking->IsStopped());
+  if (marking->IsStopped()) {
+    marking->Start();
+  }
+  CHECK(marking->IsMarking());
+  while (!marking->IsComplete()) {
+    marking->Step(MB, IncrementalMarking::NO_GC_VIA_STACK_GUARD);
+  }
+  CHECK(marking->IsComplete());
+}
+
+
 static void CheckMap(Map* map, int type, int instance_size) {
   CHECK(map->IsHeapObject());
 #ifdef DEBUG
@@ -400,9 +415,10 @@ TEST(WeakGlobalHandlesMark) {
     h2 = global_handles->Create(*u);
   }
 
+  // Make sure the objects are promoted.
   HEAP->CollectGarbage(OLD_POINTER_SPACE);
   HEAP->CollectGarbage(NEW_SPACE);
-  // Make sure the object is promoted.
+  CHECK(!HEAP->InNewSpace(*h1) && !HEAP->InNewSpace(*h2));
 
   global_handles->MakeWeak(h2.location(),
                            reinterpret_cast<void*>(1234),
@@ -410,7 +426,8 @@ TEST(WeakGlobalHandlesMark) {
   CHECK(!GlobalHandles::IsNearDeath(h1.location()));
   CHECK(!GlobalHandles::IsNearDeath(h2.location()));
 
-  HEAP->CollectGarbage(OLD_POINTER_SPACE);
+  // Incremental marking potentially marked handles before they turned weak.
+  HEAP->CollectAllGarbage(Heap::kAbortIncrementalMarkingMask);
 
   CHECK((*h1)->IsString());
 
@@ -942,9 +959,9 @@ TEST(Regression39128) {
 
 
 TEST(TestCodeFlushing) {
-  i::FLAG_allow_natives_syntax = true;
   // If we do not flush code this test is invalid.
   if (!FLAG_flush_code) return;
+  i::FLAG_allow_natives_syntax = true;
   InitializeVM();
   v8::HandleScope scope;
   const char* source = "function foo() {"
@@ -967,18 +984,16 @@ TEST(TestCodeFlushing) {
   Handle<JSFunction> function(JSFunction::cast(func_value));
   CHECK(function->shared()->is_compiled());
 
-  // TODO(1609) Currently incremental marker does not support code flushing.
+  // The code will survive at least two GCs.
   HEAP->CollectAllGarbage(Heap::kAbortIncrementalMarkingMask);
   HEAP->CollectAllGarbage(Heap::kAbortIncrementalMarkingMask);
-
   CHECK(function->shared()->is_compiled());
 
-  HEAP->CollectAllGarbage(Heap::kAbortIncrementalMarkingMask);
-  HEAP->CollectAllGarbage(Heap::kAbortIncrementalMarkingMask);
-  HEAP->CollectAllGarbage(Heap::kAbortIncrementalMarkingMask);
-  HEAP->CollectAllGarbage(Heap::kAbortIncrementalMarkingMask);
-  HEAP->CollectAllGarbage(Heap::kAbortIncrementalMarkingMask);
-  HEAP->CollectAllGarbage(Heap::kAbortIncrementalMarkingMask);
+  // Simulate several GCs that use full marking.
+  const int kAgingThreshold = 6;
+  for (int i = 0; i < kAgingThreshold; i++) {
+    HEAP->CollectAllGarbage(Heap::kAbortIncrementalMarkingMask);
+  }
 
   // foo should no longer be in the compilation cache
   CHECK(!function->shared()->is_compiled() || function->IsOptimized());
@@ -990,6 +1005,199 @@ TEST(TestCodeFlushing) {
 }
 
 
+TEST(TestCodeFlushingIncremental) {
+  // If we do not flush code this test is invalid.
+  if (!FLAG_flush_code || !FLAG_flush_code_incrementally) return;
+  i::FLAG_allow_natives_syntax = true;
+  InitializeVM();
+  v8::HandleScope scope;
+  const char* source = "function foo() {"
+                       "  var x = 42;"
+                       "  var y = 42;"
+                       "  var z = x + y;"
+                       "};"
+                       "foo()";
+  Handle<String> foo_name = FACTORY->LookupAsciiSymbol("foo");
+
+  // This compile will add the code to the compilation cache.
+  { v8::HandleScope scope;
+    CompileRun(source);
+  }
+
+  // Check function is compiled.
+  Object* func_value = Isolate::Current()->context()->global_object()->
+      GetProperty(*foo_name)->ToObjectChecked();
+  CHECK(func_value->IsJSFunction());
+  Handle<JSFunction> function(JSFunction::cast(func_value));
+  CHECK(function->shared()->is_compiled());
+
+  // The code will survive at least two GCs.
+  HEAP->CollectAllGarbage(Heap::kAbortIncrementalMarkingMask);
+  HEAP->CollectAllGarbage(Heap::kAbortIncrementalMarkingMask);
+  CHECK(function->shared()->is_compiled());
+
+  // Simulate several GCs that use incremental marking.
+  const int kAgingThreshold = 6;
+  for (int i = 0; i < kAgingThreshold; i++) {
+    SimulateIncrementalMarking();
+    HEAP->CollectAllGarbage(Heap::kNoGCFlags);
+  }
+  CHECK(!function->shared()->is_compiled() || function->IsOptimized());
+  CHECK(!function->is_compiled() || function->IsOptimized());
+
+  // This compile will compile the function again.
+  { v8::HandleScope scope;
+    CompileRun("foo();");
+  }
+
+  // Simulate several GCs that use incremental marking but make sure
+  // the loop breaks once the function is enqueued as a candidate.
+  for (int i = 0; i < kAgingThreshold; i++) {
+    SimulateIncrementalMarking();
+    if (!function->next_function_link()->IsUndefined()) break;
+    HEAP->CollectAllGarbage(Heap::kNoGCFlags);
+  }
+
+  // Force optimization while incremental marking is active and while
+  // the function is enqueued as a candidate.
+  { v8::HandleScope scope;
+    CompileRun("%OptimizeFunctionOnNextCall(foo); foo();");
+  }
+
+  // Simulate one final GC to make sure the candidate queue is sane.
+  HEAP->CollectAllGarbage(Heap::kNoGCFlags);
+  CHECK(function->shared()->is_compiled() || !function->IsOptimized());
+  CHECK(function->is_compiled() || !function->IsOptimized());
+}
+
+
+TEST(TestCodeFlushingIncrementalScavenge) {
+  // If we do not flush code this test is invalid.
+  if (!FLAG_flush_code || !FLAG_flush_code_incrementally) return;
+  i::FLAG_allow_natives_syntax = true;
+  InitializeVM();
+  v8::HandleScope scope;
+  const char* source = "var foo = function() {"
+                       "  var x = 42;"
+                       "  var y = 42;"
+                       "  var z = x + y;"
+                       "};"
+                       "foo();"
+                       "var bar = function() {"
+                       "  var x = 23;"
+                       "};"
+                       "bar();";
+  Handle<String> foo_name = FACTORY->LookupAsciiSymbol("foo");
+  Handle<String> bar_name = FACTORY->LookupAsciiSymbol("bar");
+
+  // Perfrom one initial GC to enable code flushing.
+  HEAP->CollectAllGarbage(Heap::kAbortIncrementalMarkingMask);
+
+  // This compile will add the code to the compilation cache.
+  { v8::HandleScope scope;
+    CompileRun(source);
+  }
+
+  // Check functions are compiled.
+  Object* func_value = Isolate::Current()->context()->global_object()->
+      GetProperty(*foo_name)->ToObjectChecked();
+  CHECK(func_value->IsJSFunction());
+  Handle<JSFunction> function(JSFunction::cast(func_value));
+  CHECK(function->shared()->is_compiled());
+  Object* func_value2 = Isolate::Current()->context()->global_object()->
+      GetProperty(*bar_name)->ToObjectChecked();
+  CHECK(func_value2->IsJSFunction());
+  Handle<JSFunction> function2(JSFunction::cast(func_value2));
+  CHECK(function2->shared()->is_compiled());
+
+  // Clear references to functions so that one of them can die.
+  { v8::HandleScope scope;
+    CompileRun("foo = 0; bar = 0;");
+  }
+
+  // Bump the code age so that flushing is triggered while the function
+  // object is still located in new-space.
+  const int kAgingThreshold = 6;
+  for (int i = 0; i < kAgingThreshold; i++) {
+    function->shared()->code()->MakeOlder(static_cast<MarkingParity>(i % 2));
+    function2->shared()->code()->MakeOlder(static_cast<MarkingParity>(i % 2));
+  }
+
+  // Simulate incremental marking so that the functions are enqueued as
+  // code flushing candidates. Then kill one of the functions. Finally
+  // perform a scavenge while incremental marking is still running.
+  SimulateIncrementalMarking();
+  *function2.location() = NULL;
+  HEAP->CollectGarbage(NEW_SPACE, "test scavenge while marking");
+
+  // Simulate one final GC to make sure the candidate queue is sane.
+  HEAP->CollectAllGarbage(Heap::kNoGCFlags);
+  CHECK(!function->shared()->is_compiled() || function->IsOptimized());
+  CHECK(!function->is_compiled() || function->IsOptimized());
+}
+
+
+TEST(TestCodeFlushingIncrementalAbort) {
+  // If we do not flush code this test is invalid.
+  if (!FLAG_flush_code || !FLAG_flush_code_incrementally) return;
+  i::FLAG_allow_natives_syntax = true;
+  InitializeVM();
+  v8::HandleScope scope;
+  const char* source = "function foo() {"
+                       "  var x = 42;"
+                       "  var y = 42;"
+                       "  var z = x + y;"
+                       "};"
+                       "foo()";
+  Handle<String> foo_name = FACTORY->LookupAsciiSymbol("foo");
+
+  // This compile will add the code to the compilation cache.
+  { v8::HandleScope scope;
+    CompileRun(source);
+  }
+
+  // Check function is compiled.
+  Object* func_value = Isolate::Current()->context()->global_object()->
+      GetProperty(*foo_name)->ToObjectChecked();
+  CHECK(func_value->IsJSFunction());
+  Handle<JSFunction> function(JSFunction::cast(func_value));
+  CHECK(function->shared()->is_compiled());
+
+  // The code will survive at least two GCs.
+  HEAP->CollectAllGarbage(Heap::kAbortIncrementalMarkingMask);
+  HEAP->CollectAllGarbage(Heap::kAbortIncrementalMarkingMask);
+  CHECK(function->shared()->is_compiled());
+
+  // Bump the code age so that flushing is triggered.
+  const int kAgingThreshold = 6;
+  for (int i = 0; i < kAgingThreshold; i++) {
+    function->shared()->code()->MakeOlder(static_cast<MarkingParity>(i % 2));
+  }
+
+  // Simulate incremental marking so that the function is enqueued as
+  // code flushing candidate.
+  SimulateIncrementalMarking();
+
+  // Enable the debugger and add a breakpoint while incremental marking
+  // is running so that incremental marking aborts and code flushing is
+  // disabled.
+  int position = 0;
+  Handle<Object> breakpoint_object(Smi::FromInt(0));
+  ISOLATE->debug()->SetBreakPoint(function, breakpoint_object, &position);
+  ISOLATE->debug()->ClearAllBreakPoints();
+
+  // Force optimization now that code flushing is disabled.
+  { v8::HandleScope scope;
+    CompileRun("%OptimizeFunctionOnNextCall(foo); foo();");
+  }
+
+  // Simulate one final GC to make sure the candidate queue is sane.
+  HEAP->CollectAllGarbage(Heap::kNoGCFlags);
+  CHECK(function->shared()->is_compiled() || !function->IsOptimized());
+  CHECK(function->is_compiled() || !function->IsOptimized());
+}
+
+
 // Count the number of native contexts in the weak list of native contexts.
 int CountNativeContexts() {
   int count = 0;
@@ -1019,6 +1227,10 @@ static int CountOptimizedUserFunctions(v8::Handle<v8::Context> context) {
 TEST(TestInternalWeakLists) {
   v8::V8::Initialize();
 
+  // Some flags turn Scavenge collections into Mark-sweep collections
+  // and hence are incompatible with this test case.
+  if (FLAG_gc_global || FLAG_stress_compaction) return;
+
   static const int kNumTestContexts = 10;
 
   v8::HandleScope scope;
@@ -1067,6 +1279,7 @@ TEST(TestInternalWeakLists) {
     }
 
     // Mark compact handles the weak references.
+    ISOLATE->compilation_cache()->Clear();
     HEAP->CollectAllGarbage(Heap::kNoGCFlags);
     CHECK_EQ(opt ? 4 : 0, CountOptimizedUserFunctions(ctx[i]));
 
@@ -1246,7 +1459,9 @@ TEST(TestSizeOfObjectsVsHeapIteratorPrecision) {
   for (HeapObject* obj = iterator.next();
        obj != NULL;
        obj = iterator.next()) {
-    size_of_objects_2 += obj->Size();
+    if (!obj->IsFreeSpace()) {
+      size_of_objects_2 += obj->Size();
+    }
   }
   // Delta must be within 5% of the larger result.
   // TODO(gc): Tighten this up by distinguishing between byte
@@ -1275,7 +1490,6 @@ static void FillUpNewSpace(NewSpace* new_space) {
   // that the scavenger does not undo the filling.
   v8::HandleScope scope;
   AlwaysAllocateScope always_allocate;
-  LinearAllocationScope allocate_linearly;
   intptr_t available = new_space->EffectiveCapacity() - new_space->Size();
   intptr_t number_of_fillers = (available / FixedArray::SizeFor(32)) - 1;
   for (intptr_t i = 0; i < number_of_fillers; i++) {
@@ -1397,6 +1611,7 @@ TEST(LeakNativeContextViaMap) {
     ctx2->Exit();
     ctx1->Exit();
     ctx1.Dispose();
+    v8::V8::ContextDisposedNotification();
   }
   HEAP->CollectAllAvailableGarbage();
   CHECK_EQ(2, NumberOfGlobalObjects());
@@ -1434,6 +1649,7 @@ TEST(LeakNativeContextViaFunction) {
     ctx2->Exit();
     ctx1->Exit();
     ctx1.Dispose();
+    v8::V8::ContextDisposedNotification();
   }
   HEAP->CollectAllAvailableGarbage();
   CHECK_EQ(2, NumberOfGlobalObjects());
@@ -1469,6 +1685,7 @@ TEST(LeakNativeContextViaMapKeyed) {
     ctx2->Exit();
     ctx1->Exit();
     ctx1.Dispose();
+    v8::V8::ContextDisposedNotification();
   }
   HEAP->CollectAllAvailableGarbage();
   CHECK_EQ(2, NumberOfGlobalObjects());
@@ -1508,6 +1725,7 @@ TEST(LeakNativeContextViaMapProto) {
     ctx2->Exit();
     ctx1->Exit();
     ctx1.Dispose();
+    v8::V8::ContextDisposedNotification();
   }
   HEAP->CollectAllAvailableGarbage();
   CHECK_EQ(2, NumberOfGlobalObjects());
@@ -1519,11 +1737,13 @@ TEST(LeakNativeContextViaMapProto) {
 
 TEST(InstanceOfStubWriteBarrier) {
   i::FLAG_allow_natives_syntax = true;
-#ifdef DEBUG
+#ifdef VERIFY_HEAP
   i::FLAG_verify_heap = true;
 #endif
+
   InitializeVM();
   if (!i::V8::UseCrankshaft()) return;
+  if (i::FLAG_force_marking_deque_overflows) return;
   v8::HandleScope outer_scope;
 
   {
@@ -1609,10 +1829,11 @@ TEST(PrototypeTransitionClearing) {
   // Make sure next prototype is placed on an old-space evacuation candidate.
   Handle<JSObject> prototype;
   PagedSpace* space = HEAP->old_pointer_space();
-  do {
+  {
+    AlwaysAllocateScope always_allocate;
+    SimulateFullSpace(space);
     prototype = FACTORY->NewJSArray(32 * KB, FAST_HOLEY_ELEMENTS, TENURED);
-  } while (space->FirstPage() == space->LastPage() ||
-      !space->LastPage()->Contains(prototype->address()));
+  }
 
   // Add a prototype on an evacuation candidate and verify that transition
   // clearing correctly records slots in prototype transition array.
@@ -1630,9 +1851,10 @@ TEST(PrototypeTransitionClearing) {
 
 TEST(ResetSharedFunctionInfoCountersDuringIncrementalMarking) {
   i::FLAG_allow_natives_syntax = true;
-#ifdef DEBUG
+#ifdef VERIFY_HEAP
   i::FLAG_verify_heap = true;
 #endif
+
   InitializeVM();
   if (!i::V8::UseCrankshaft()) return;
   v8::HandleScope outer_scope;
@@ -1685,9 +1907,10 @@ TEST(ResetSharedFunctionInfoCountersDuringIncrementalMarking) {
 
 TEST(ResetSharedFunctionInfoCountersDuringMarkSweep) {
   i::FLAG_allow_natives_syntax = true;
-#ifdef DEBUG
+#ifdef VERIFY_HEAP
   i::FLAG_verify_heap = true;
 #endif
+
   InitializeVM();
   if (!i::V8::UseCrankshaft()) return;
   v8::HandleScope outer_scope;
@@ -1729,9 +1952,10 @@ TEST(OptimizedAllocationAlwaysInNewSpace) {
   i::FLAG_allow_natives_syntax = true;
   InitializeVM();
   if (!i::V8::UseCrankshaft() || i::FLAG_always_opt) return;
+  if (i::FLAG_gc_global || i::FLAG_stress_compaction) return;
   v8::HandleScope scope;
 
-  FillUpNewSpace(HEAP->new_space());
+  SimulateFullSpace(HEAP->new_space());
   AlwaysAllocateScope always_allocate;
   v8::Local<v8::Value> res = CompileRun(
       "function c(x) {"
@@ -1758,19 +1982,6 @@ static int CountMapTransitions(Map* map) {
 }
 
 
-// Go through all incremental marking steps in one swoop.
-static void SimulateIncrementalMarking() {
-  IncrementalMarking* marking = HEAP->incremental_marking();
-  CHECK(marking->IsStopped());
-  marking->Start();
-  CHECK(marking->IsMarking());
-  while (!marking->IsComplete()) {
-    marking->Step(MB, IncrementalMarking::NO_GC_VIA_STACK_GUARD);
-  }
-  CHECK(marking->IsComplete());
-}
-
-
 // Test that map transitions are cleared and maps are collected with
 // incremental marking as well.
 TEST(Regress1465) {
@@ -1895,10 +2106,6 @@ TEST(Regress2143b) {
 }
 
 
-// Implemented in the test-alloc.cc test suite.
-void SimulateFullSpace(PagedSpace* space);
-
-
 TEST(ReleaseOverReservedPages) {
   i::FLAG_trace_gc = true;
   // The optimizer can allocate stuff, messing up the test.
@@ -1921,7 +2128,7 @@ TEST(ReleaseOverReservedPages) {
   // Triggering one GC will cause a lot of garbage to be discovered but
   // even spread across all allocated pages.
   HEAP->CollectAllGarbage(Heap::kNoGCFlags, "triggered for preparation");
-  CHECK_EQ(number_of_test_pages + 1, old_pointer_space->CountTotalPages());
+  CHECK_GE(number_of_test_pages + 1, old_pointer_space->CountTotalPages());
 
   // Triggering subsequent GCs should cause at least half of the pages
   // to be released to the OS after at most two cycles.
@@ -1930,8 +2137,13 @@ TEST(ReleaseOverReservedPages) {
   HEAP->CollectAllGarbage(Heap::kNoGCFlags, "triggered by test 2");
   CHECK_GE(number_of_test_pages + 1, old_pointer_space->CountTotalPages() * 2);
 
-  // Triggering a last-resort GC should cause all pages to be released
-  // to the OS so that other processes can seize the memory.
+  // Triggering a last-resort GC should cause all pages to be released to the
+  // OS so that other processes can seize the memory.  If we get a failure here
+  // where there are 2 pages left instead of 1, then we should increase the
+  // size of the first page a little in SizeOfFirstPage in spaces.cc.  The
+  // first page should be small in order to reduce memory used when the VM
+  // boots, but if the 20 small arrays don't fit on the first page then that's
+  // an indication that it is too small.
   HEAP->CollectAllAvailableGarbage("triggered really hard");
   CHECK_EQ(1, old_pointer_space->CountTotalPages());
 }
@@ -1947,27 +2159,22 @@ TEST(Regress2237) {
     v8::HandleScope inner_scope;
     const char* c = "This text is long enough to trigger sliced strings.";
     Handle<String> s = FACTORY->NewStringFromAscii(CStrVector(c));
-    CHECK(s->IsSeqAsciiString());
+    CHECK(s->IsSeqOneByteString());
     CHECK(HEAP->InNewSpace(*s));
 
     // Generate a sliced string that is based on the above parent and
     // lives in old-space.
-    FillUpNewSpace(HEAP->new_space());
+    SimulateFullSpace(HEAP->new_space());
     AlwaysAllocateScope always_allocate;
-    Handle<String> t;
-    // TODO(mstarzinger): Unfortunately FillUpNewSpace() still leaves
-    // some slack, so we need to allocate a few sliced strings.
-    for (int i = 0; i < 16; i++) {
-      t = FACTORY->NewProperSubString(s, 5, 35);
-    }
+    Handle<String> t = FACTORY->NewProperSubString(s, 5, 35);
     CHECK(t->IsSlicedString());
     CHECK(!HEAP->InNewSpace(*t));
     *slice.location() = *t.location();
   }
 
-  CHECK(SlicedString::cast(*slice)->parent()->IsSeqAsciiString());
+  CHECK(SlicedString::cast(*slice)->parent()->IsSeqOneByteString());
   HEAP->CollectAllGarbage(Heap::kNoGCFlags);
-  CHECK(SlicedString::cast(*slice)->parent()->IsSeqAsciiString());
+  CHECK(SlicedString::cast(*slice)->parent()->IsSeqOneByteString());
 }
 
 
@@ -2102,8 +2309,6 @@ TEST(IncrementalMarkingPreservesMonomorhpicIC) {
   Code* ic_before = FindFirstIC(f->shared()->code(), Code::LOAD_IC);
   CHECK(ic_before->ic_state() == MONOMORPHIC);
 
-  // Fire context dispose notification.
-  v8::V8::ContextDisposedNotification();
   SimulateIncrementalMarking();
   HEAP->CollectAllGarbage(Heap::kNoGCFlags);
 
@@ -2209,19 +2414,13 @@ class SourceResource: public v8::String::ExternalAsciiStringResource {
 };
 
 
-TEST(ReleaseStackTraceData) {
+void ReleaseStackTraceDataTest(const char* source) {
   // Test that the data retained by the Error.stack accessor is released
   // after the first time the accessor is fired.  We use external string
   // to check whether the data is being released since the external string
   // resource's callback is fired when the external string is GC'ed.
   InitializeVM();
   v8::HandleScope scope;
-  static const char* source = "var error = 1;       "
-                              "try {                "
-                              "  throw new Error(); "
-                              "} catch (e) {        "
-                              "  error = e;         "
-                              "}                    ";
   SourceResource* resource = new SourceResource(i::StrDup(source));
   {
     v8::HandleScope scope;
@@ -2233,15 +2432,32 @@ TEST(ReleaseStackTraceData) {
   // External source is being retained by the stack trace.
   CHECK(!resource->IsDisposed());
 
-  CompileRun("error.stack; error.stack;");
+  CompileRun("error.stack;");
   HEAP->CollectAllAvailableGarbage();
   // External source has been released.
   CHECK(resource->IsDisposed());
-
   delete resource;
 }
 
 
+TEST(ReleaseStackTraceData) {
+  static const char* source1 = "var error = null;            "
+  /* Normal Error */           "try {                        "
+                               "  throw new Error();         "
+                               "} catch (e) {                "
+                               "  error = e;                 "
+                               "}                            ";
+  static const char* source2 = "var error = null;            "
+  /* Stack overflow */         "try {                        "
+                               "  (function f() { f(); })(); "
+                               "} catch (e) {                "
+                               "  error = e;                 "
+                               "}                            ";
+  ReleaseStackTraceDataTest(source1);
+  ReleaseStackTraceDataTest(source2);
+}
+
+
 TEST(Regression144230) {
   InitializeVM();
   v8::HandleScope scope;
@@ -2299,3 +2515,63 @@ TEST(Regression144230) {
   USE(global->SetProperty(*name, *call_function, NONE, kNonStrictMode));
   CompileRun("call();");
 }
+
+
+TEST(Regress159140) {
+  i::FLAG_allow_natives_syntax = true;
+  i::FLAG_flush_code_incrementally = true;
+  InitializeVM();
+  v8::HandleScope scope;
+
+  // Perform one initial GC to enable code flushing.
+  HEAP->CollectAllGarbage(Heap::kAbortIncrementalMarkingMask);
+
+  // Prepare several closures that are all eligible for code flushing
+  // because all reachable ones are not optimized. Make sure that the
+  // optimized code object is directly reachable through a handle so
+  // that it is marked black during incremental marking.
+  Handle<Code> code;
+  {
+    HandleScope inner_scope;
+    CompileRun("function h(x) {}"
+               "function mkClosure() {"
+               "  return function(x) { return x + 1; };"
+               "}"
+               "var f = mkClosure();"
+               "var g = mkClosure();"
+               "f(1); f(2);"
+               "g(1); g(2);"
+               "h(1); h(2);"
+               "%OptimizeFunctionOnNextCall(f); f(3);"
+               "%OptimizeFunctionOnNextCall(h); h(3);");
+
+    Handle<JSFunction> f =
+        v8::Utils::OpenHandle(
+            *v8::Handle<v8::Function>::Cast(
+                v8::Context::GetCurrent()->Global()->Get(v8_str("f"))));
+    CHECK(f->is_compiled());
+    CompileRun("f = null;");
+
+    Handle<JSFunction> g =
+        v8::Utils::OpenHandle(
+            *v8::Handle<v8::Function>::Cast(
+                v8::Context::GetCurrent()->Global()->Get(v8_str("g"))));
+    CHECK(g->is_compiled());
+    const int kAgingThreshold = 6;
+    for (int i = 0; i < kAgingThreshold; i++) {
+      g->code()->MakeOlder(static_cast<MarkingParity>(i % 2));
+    }
+
+    code = inner_scope.CloseAndEscape(Handle<Code>(f->code()));
+  }
+
+  // Simulate incremental marking so that the functions are enqueued as
+  // code flushing candidates. Then optimize one function. Finally
+  // finish the GC to complete code flushing.
+  SimulateIncrementalMarking();
+  CompileRun("%OptimizeFunctionOnNextCall(g); g(3);");
+  HEAP->CollectAllGarbage(Heap::kNoGCFlags);
+
+  // Unoptimized code is missing and the deoptimizer will go ballistic.
+  CompileRun("g('bozo');");
+}
diff --git a/deps/v8/test/cctest/test-lockers.cc b/deps/v8/test/cctest/test-lockers.cc
index 5035f87642..57f7178493 100644
--- a/deps/v8/test/cctest/test-lockers.cc
+++ b/deps/v8/test/cctest/test-lockers.cc
@@ -59,9 +59,9 @@ using ::v8::V8;
 class KangarooThread : public v8::internal::Thread {
  public:
   KangarooThread(v8::Isolate* isolate,
-                 v8::Handle<v8::Context> context, int value)
+                 v8::Handle<v8::Context> context)
       : Thread("KangarooThread"),
-        isolate_(isolate), context_(context), value_(value) {
+        isolate_(isolate), context_(context) {
   }
 
   void Run() {
@@ -90,7 +90,6 @@ class KangarooThread : public v8::internal::Thread {
  private:
   v8::Isolate* isolate_;
   Persistent<v8::Context> context_;
-  int value_;
 };
 
 // Migrates an isolate from one thread to another
@@ -106,7 +105,7 @@ TEST(KangarooIsolates) {
     CHECK_EQ(isolate, v8::internal::Isolate::Current());
     CompileRun("function getValue() { return 30; }");
   }
-  KangarooThread thread1(isolate, context, 1);
+  KangarooThread thread1(isolate, context);
   thread1.Start();
   thread1.Join();
 }
diff --git a/deps/v8/test/cctest/test-log.cc b/deps/v8/test/cctest/test-log.cc
index 6f2324dbb8..892a542229 100644
--- a/deps/v8/test/cctest/test-log.cc
+++ b/deps/v8/test/cctest/test-log.cc
@@ -392,7 +392,7 @@ TEST(LogCallbacks) {
 
   i::EmbeddedVector<char, 100> ref_data;
   i::OS::SNPrintF(ref_data,
-                  "code-creation,Callback,0x%" V8PRIxPTR ",1,\"method1\"\0",
+                  "code-creation,Callback,-3,0x%" V8PRIxPTR ",1,\"method1\"\0",
                   ObjMethod1);
 
   CHECK_NE(NULL, StrNStr(log.start(), ref_data.start(), log.length()));
@@ -435,21 +435,21 @@ TEST(LogAccessorCallbacks) {
 
   EmbeddedVector<char, 100> prop1_getter_record;
   i::OS::SNPrintF(prop1_getter_record,
-                  "code-creation,Callback,0x%" V8PRIxPTR ",1,\"get prop1\"",
+                  "code-creation,Callback,-3,0x%" V8PRIxPTR ",1,\"get prop1\"",
                   Prop1Getter);
   CHECK_NE(NULL,
            StrNStr(log.start(), prop1_getter_record.start(), log.length()));
 
   EmbeddedVector<char, 100> prop1_setter_record;
   i::OS::SNPrintF(prop1_setter_record,
-                  "code-creation,Callback,0x%" V8PRIxPTR ",1,\"set prop1\"",
+                  "code-creation,Callback,-3,0x%" V8PRIxPTR ",1,\"set prop1\"",
                   Prop1Setter);
   CHECK_NE(NULL,
            StrNStr(log.start(), prop1_setter_record.start(), log.length()));
 
   EmbeddedVector<char, 100> prop2_getter_record;
   i::OS::SNPrintF(prop2_getter_record,
-                  "code-creation,Callback,0x%" V8PRIxPTR ",1,\"get prop2\"",
+                  "code-creation,Callback,-3,0x%" V8PRIxPTR ",1,\"get prop2\"",
                   Prop2Getter);
   CHECK_NE(NULL,
            StrNStr(log.start(), prop2_getter_record.start(), log.length()));
diff --git a/deps/v8/test/cctest/test-mark-compact.cc b/deps/v8/test/cctest/test-mark-compact.cc
index 18c63b2fd0..69abd8d680 100644
--- a/deps/v8/test/cctest/test-mark-compact.cc
+++ b/deps/v8/test/cctest/test-mark-compact.cc
@@ -311,6 +311,7 @@ static void WeakPointerCallback(v8::Persistent<v8::Value> handle, void* id) {
 }
 
 TEST(ObjectGroups) {
+  FLAG_incremental_marking = false;
   InitializeVM();
   GlobalHandles* global_handles = Isolate::Current()->global_handles();
 
@@ -545,9 +546,9 @@ TEST(BootUpMemoryUse) {
       }
     } else {
       if (v8::internal::Snapshot::IsEnabled()) {
-        CHECK_LE(delta, 2600 * 1024);  // 2484.
+        CHECK_LE(delta, 2500 * 1024);  // 2400.
       } else {
-        CHECK_LE(delta, 2950 * 1024);  // 2844
+        CHECK_LE(delta, 2860 * 1024);  // 2760.
       }
     }
   }
diff --git a/deps/v8/test/cctest/test-object-observe.cc b/deps/v8/test/cctest/test-object-observe.cc
new file mode 100644
index 0000000000..25e5557a89
--- /dev/null
+++ b/deps/v8/test/cctest/test-object-observe.cc
@@ -0,0 +1,280 @@
+// Copyright 2012 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#include "v8.h"
+
+#include "cctest.h"
+
+using namespace v8;
+
+namespace {
+// Need to create a new isolate when FLAG_harmony_observation is on.
+class HarmonyIsolate {
+ public:
+  HarmonyIsolate() {
+    i::FLAG_harmony_observation = true;
+    isolate_ = Isolate::New();
+    isolate_->Enter();
+  }
+
+  ~HarmonyIsolate() {
+    isolate_->Exit();
+    isolate_->Dispose();
+  }
+
+ private:
+  Isolate* isolate_;
+};
+}
+
+TEST(PerIsolateState) {
+  HarmonyIsolate isolate;
+  HandleScope scope;
+  LocalContext context1;
+  CompileRun(
+      "var count = 0;"
+      "var calls = 0;"
+      "var observer = function(records) { count = records.length; calls++ };"
+      "var obj = {};"
+      "Object.observe(obj, observer);");
+  Handle<Value> observer = CompileRun("observer");
+  Handle<Value> obj = CompileRun("obj");
+  Handle<Value> notify_fun1 = CompileRun(
+      "(function() { obj.foo = 'bar'; })");
+  Handle<Value> notify_fun2;
+  {
+    LocalContext context2;
+    context2->Global()->Set(String::New("obj"), obj);
+    notify_fun2 = CompileRun(
+        "(function() { obj.foo = 'baz'; })");
+  }
+  Handle<Value> notify_fun3;
+  {
+    LocalContext context3;
+    context3->Global()->Set(String::New("obj"), obj);
+    notify_fun3 = CompileRun(
+        "(function() { obj.foo = 'bat'; })");
+  }
+  {
+    LocalContext context4;
+    context4->Global()->Set(String::New("observer"), observer);
+    context4->Global()->Set(String::New("fun1"), notify_fun1);
+    context4->Global()->Set(String::New("fun2"), notify_fun2);
+    context4->Global()->Set(String::New("fun3"), notify_fun3);
+    CompileRun("fun1(); fun2(); fun3(); Object.deliverChangeRecords(observer)");
+  }
+  CHECK_EQ(1, CompileRun("calls")->Int32Value());
+  CHECK_EQ(3, CompileRun("count")->Int32Value());
+}
+
+TEST(EndOfMicrotaskDelivery) {
+  HarmonyIsolate isolate;
+  HandleScope scope;
+  LocalContext context;
+  CompileRun(
+      "var obj = {};"
+      "var count = 0;"
+      "var observer = function(records) { count = records.length };"
+      "Object.observe(obj, observer);"
+      "obj.foo = 'bar';");
+  CHECK_EQ(1, CompileRun("count")->Int32Value());
+}
+
+TEST(DeliveryOrdering) {
+  HarmonyIsolate isolate;
+  HandleScope scope;
+  LocalContext context;
+  CompileRun(
+      "var obj1 = {};"
+      "var obj2 = {};"
+      "var ordering = [];"
+      "function observer2() { ordering.push(2); };"
+      "function observer1() { ordering.push(1); };"
+      "function observer3() { ordering.push(3); };"
+      "Object.observe(obj1, observer1);"
+      "Object.observe(obj1, observer2);"
+      "Object.observe(obj1, observer3);"
+      "obj1.foo = 'bar';");
+  CHECK_EQ(3, CompileRun("ordering.length")->Int32Value());
+  CHECK_EQ(1, CompileRun("ordering[0]")->Int32Value());
+  CHECK_EQ(2, CompileRun("ordering[1]")->Int32Value());
+  CHECK_EQ(3, CompileRun("ordering[2]")->Int32Value());
+  CompileRun(
+      "ordering = [];"
+      "Object.observe(obj2, observer3);"
+      "Object.observe(obj2, observer2);"
+      "Object.observe(obj2, observer1);"
+      "obj2.foo = 'baz'");
+  CHECK_EQ(3, CompileRun("ordering.length")->Int32Value());
+  CHECK_EQ(1, CompileRun("ordering[0]")->Int32Value());
+  CHECK_EQ(2, CompileRun("ordering[1]")->Int32Value());
+  CHECK_EQ(3, CompileRun("ordering[2]")->Int32Value());
+}
+
+TEST(DeliveryOrderingReentrant) {
+  HarmonyIsolate isolate;
+  HandleScope scope;
+  LocalContext context;
+  CompileRun(
+      "var obj = {};"
+      "var reentered = false;"
+      "var ordering = [];"
+      "function observer1() { ordering.push(1); };"
+      "function observer2() {"
+      "  if (!reentered) {"
+      "    obj.foo = 'baz';"
+      "    reentered = true;"
+      "  }"
+      "  ordering.push(2);"
+      "};"
+      "function observer3() { ordering.push(3); };"
+      "Object.observe(obj, observer1);"
+      "Object.observe(obj, observer2);"
+      "Object.observe(obj, observer3);"
+      "obj.foo = 'bar';");
+  CHECK_EQ(5, CompileRun("ordering.length")->Int32Value());
+  CHECK_EQ(1, CompileRun("ordering[0]")->Int32Value());
+  CHECK_EQ(2, CompileRun("ordering[1]")->Int32Value());
+  CHECK_EQ(3, CompileRun("ordering[2]")->Int32Value());
+  // Note that we re-deliver to observers 1 and 2, while observer3
+  // already received the second record during the first round.
+  CHECK_EQ(1, CompileRun("ordering[3]")->Int32Value());
+  CHECK_EQ(2, CompileRun("ordering[1]")->Int32Value());
+}
+
+TEST(DeliveryOrderingDeliverChangeRecords) {
+  HarmonyIsolate isolate;
+  HandleScope scope;
+  LocalContext context;
+  CompileRun(
+      "var obj = {};"
+      "var ordering = [];"
+      "function observer1() { ordering.push(1); if (!obj.b) obj.b = true };"
+      "function observer2() { ordering.push(2); };"
+      "Object.observe(obj, observer1);"
+      "Object.observe(obj, observer2);"
+      "obj.a = 1;"
+      "Object.deliverChangeRecords(observer2);");
+  CHECK_EQ(4, CompileRun("ordering.length")->Int32Value());
+  // First, observer2 is called due to deliverChangeRecords
+  CHECK_EQ(2, CompileRun("ordering[0]")->Int32Value());
+  // Then, observer1 is called when the stack unwinds
+  CHECK_EQ(1, CompileRun("ordering[1]")->Int32Value());
+  // observer1's mutation causes both 1 and 2 to be reactivated,
+  // with 1 having priority.
+  CHECK_EQ(1, CompileRun("ordering[2]")->Int32Value());
+  CHECK_EQ(2, CompileRun("ordering[3]")->Int32Value());
+}
+
+TEST(ObjectHashTableGrowth) {
+  HarmonyIsolate isolate;
+  HandleScope scope;
+  // Initializing this context sets up initial hash tables.
+  LocalContext context;
+  Handle<Value> obj = CompileRun("obj = {};");
+  Handle<Value> observer = CompileRun(
+      "var ran = false;"
+      "(function() { ran = true })");
+  {
+    // As does initializing this context.
+    LocalContext context2;
+    context2->Global()->Set(String::New("obj"), obj);
+    context2->Global()->Set(String::New("observer"), observer);
+    CompileRun(
+        "var objArr = [];"
+        // 100 objects should be enough to make the hash table grow
+        // (and thus relocate).
+        "for (var i = 0; i < 100; ++i) {"
+        "  objArr.push({});"
+        "  Object.observe(objArr[objArr.length-1], function(){});"
+        "}"
+        "Object.observe(obj, observer);");
+  }
+  // obj is now marked "is_observed", but our map has moved.
+  CompileRun("obj.foo = 'bar'");
+  CHECK(CompileRun("ran")->BooleanValue());
+}
+
+TEST(GlobalObjectObservation) {
+  HarmonyIsolate isolate;
+  HandleScope scope;
+  LocalContext context;
+  Handle<Object> global_proxy = context->Global();
+  Handle<Object> inner_global = global_proxy->GetPrototype().As<Object>();
+  CompileRun(
+      "var records = [];"
+      "var global = this;"
+      "Object.observe(global, function(r) { [].push.apply(records, r) });"
+      "global.foo = 'hello';");
+  CHECK_EQ(1, CompileRun("records.length")->Int32Value());
+  CHECK(global_proxy->StrictEquals(CompileRun("records[0].object")));
+
+  // Detached, mutating the proxy has no effect.
+  context->DetachGlobal();
+  CompileRun("global.bar = 'goodbye';");
+  CHECK_EQ(1, CompileRun("records.length")->Int32Value());
+
+  // Mutating the global object directly still has an effect...
+  CompileRun("this.bar = 'goodbye';");
+  CHECK_EQ(2, CompileRun("records.length")->Int32Value());
+  CHECK(inner_global->StrictEquals(CompileRun("records[1].object")));
+
+  // Reattached, back to global proxy.
+  context->ReattachGlobal(global_proxy);
+  CompileRun("global.baz = 'again';");
+  CHECK_EQ(3, CompileRun("records.length")->Int32Value());
+  CHECK(global_proxy->StrictEquals(CompileRun("records[2].object")));
+
+  // Attached to a different context, should not leak mutations
+  // to the old context.
+  context->DetachGlobal();
+  {
+    LocalContext context2;
+    context2->DetachGlobal();
+    context2->ReattachGlobal(global_proxy);
+    CompileRun(
+        "var records2 = [];"
+        "Object.observe(this, function(r) { [].push.apply(records2, r) });"
+        "this.bat = 'context2';");
+    CHECK_EQ(1, CompileRun("records2.length")->Int32Value());
+    CHECK(global_proxy->StrictEquals(CompileRun("records2[0].object")));
+  }
+  CHECK_EQ(3, CompileRun("records.length")->Int32Value());
+
+  // Attaching by passing to Context::New
+  {
+    // Delegates to Context::New
+    LocalContext context3(NULL, Handle<ObjectTemplate>(), global_proxy);
+    CompileRun(
+        "var records3 = [];"
+        "Object.observe(this, function(r) { [].push.apply(records3, r) });"
+        "this.qux = 'context3';");
+    CHECK_EQ(1, CompileRun("records3.length")->Int32Value());
+    CHECK(global_proxy->StrictEquals(CompileRun("records3[0].object")));
+  }
+  CHECK_EQ(3, CompileRun("records.length")->Int32Value());
+}
diff --git a/deps/v8/test/cctest/test-parsing.cc b/deps/v8/test/cctest/test-parsing.cc
index 717c66519f..ed480cd0d0 100755
--- a/deps/v8/test/cctest/test-parsing.cc
+++ b/deps/v8/test/cctest/test-parsing.cc
@@ -1041,6 +1041,31 @@ TEST(ScopePositions) {
 }
 
 
+i::Handle<i::String> FormatMessage(i::ScriptDataImpl* data) {
+  i::Handle<i::String> format = v8::Utils::OpenHandle(
+                                    *v8::String::New(data->BuildMessage()));
+  i::Vector<const char*> args = data->BuildArgs();
+  i::Handle<i::JSArray> args_array = FACTORY->NewJSArray(args.length());
+  for (int i = 0; i < args.length(); i++) {
+    i::JSArray::SetElement(args_array,
+                           i,
+                           v8::Utils::OpenHandle(*v8::String::New(args[i])),
+                           NONE,
+                           i::kNonStrictMode);
+  }
+  i::Handle<i::JSObject> builtins(i::Isolate::Current()->js_builtins_object());
+  i::Handle<i::Object> format_fun =
+      i::GetProperty(builtins, "FormatMessage");
+  i::Handle<i::Object> arg_handles[] = { format, args_array };
+  bool has_exception = false;
+  i::Handle<i::Object> result =
+      i::Execution::Call(format_fun, builtins, 2, arg_handles, &has_exception);
+  CHECK(!has_exception);
+  CHECK(result->IsString());
+  return i::Handle<i::String>::cast(result);
+}
+
+
 void TestParserSync(i::Handle<i::String> source, int flags) {
   uintptr_t stack_limit = i::Isolate::Current()->stack_guard()->real_climit();
   bool harmony_scoping = ((i::kLanguageModeMask & flags) == i::EXTENDED_MODE);
@@ -1067,53 +1092,50 @@ void TestParserSync(i::Handle<i::String> source, int flags) {
   i::FunctionLiteral* function = parser.ParseProgram();
   i::FLAG_harmony_scoping = save_harmony_scoping;
 
-  i::String* type_string = NULL;
+  // Check that preparsing fails iff parsing fails.
   if (function == NULL) {
     // Extract exception from the parser.
-    i::Handle<i::String> type_symbol = FACTORY->LookupAsciiSymbol("type");
     CHECK(i::Isolate::Current()->has_pending_exception());
     i::MaybeObject* maybe_object = i::Isolate::Current()->pending_exception();
     i::JSObject* exception = NULL;
     CHECK(maybe_object->To(&exception));
+    i::Handle<i::JSObject> exception_handle(exception);
+    i::Handle<i::String> message_string =
+        i::Handle<i::String>::cast(i::GetProperty(exception_handle, "message"));
 
-    // Get the type string.
-    maybe_object = exception->GetProperty(*type_symbol);
-    CHECK(maybe_object->To(&type_string));
-  }
-
-  // Check that preparsing fails iff parsing fails.
-  if (data.has_error() && function != NULL) {
-    i::OS::Print(
-        "Preparser failed on:\n"
-        "\t%s\n"
-        "with error:\n"
-        "\t%s\n"
-        "However, the parser succeeded",
-        *source->ToCString(), data.BuildMessage());
-    CHECK(false);
-  } else if (!data.has_error() && function == NULL) {
-    i::OS::Print(
-        "Parser failed on:\n"
-        "\t%s\n"
-        "with error:\n"
-        "\t%s\n"
-        "However, the preparser succeeded",
-        *source->ToCString(), *type_string->ToCString());
-    CHECK(false);
-  }
-
-  // Check that preparser and parser produce the same error.
-  if (function == NULL) {
-    if (!type_string->IsEqualTo(i::CStrVector(data.BuildMessage()))) {
+    if (!data.has_error()) {
+      i::OS::Print(
+          "Parser failed on:\n"
+          "\t%s\n"
+          "with error:\n"
+          "\t%s\n"
+          "However, the preparser succeeded",
+          *source->ToCString(), *message_string->ToCString());
+      CHECK(false);
+    }
+    // Check that preparser and parser produce the same error.
+    i::Handle<i::String> preparser_message = FormatMessage(&data);
+    if (!message_string->Equals(*preparser_message)) {
       i::OS::Print(
           "Expected parser and preparser to produce the same error on:\n"
           "\t%s\n"
           "However, found the following error messages\n"
           "\tparser:    %s\n"
           "\tpreparser: %s\n",
-          *source->ToCString(), *type_string->ToCString(), data.BuildMessage());
+          *source->ToCString(),
+          *message_string->ToCString(),
+          *preparser_message->ToCString());
       CHECK(false);
     }
+  } else if (data.has_error()) {
+    i::OS::Print(
+        "Preparser failed on:\n"
+        "\t%s\n"
+        "with error:\n"
+        "\t%s\n"
+        "However, the parser succeeded",
+        *source->ToCString(), *FormatMessage(&data)->ToCString());
+    CHECK(false);
   }
 }
 
diff --git a/deps/v8/test/cctest/test-regexp.cc b/deps/v8/test/cctest/test-regexp.cc
index e433b925e8..726108d270 100644
--- a/deps/v8/test/cctest/test-regexp.cc
+++ b/deps/v8/test/cctest/test-regexp.cc
@@ -759,7 +759,7 @@ TEST(MacroAssemblerNativeSuccess) {
 
   int captures[4] = {42, 37, 87, 117};
   Handle<String> input = factory->NewStringFromAscii(CStrVector("foofoo"));
-  Handle<SeqAsciiString> seq_input = Handle<SeqAsciiString>::cast(input);
+  Handle<SeqOneByteString> seq_input = Handle<SeqOneByteString>::cast(input);
   const byte* start_adr =
       reinterpret_cast<const byte*>(seq_input->GetCharsAddress());
 
@@ -805,7 +805,7 @@ TEST(MacroAssemblerNativeSimple) {
 
   int captures[4] = {42, 37, 87, 117};
   Handle<String> input = factory->NewStringFromAscii(CStrVector("foofoo"));
-  Handle<SeqAsciiString> seq_input = Handle<SeqAsciiString>::cast(input);
+  Handle<SeqOneByteString> seq_input = Handle<SeqOneByteString>::cast(input);
   Address start_adr = seq_input->GetCharsAddress();
 
   NativeRegExpMacroAssembler::Result result =
@@ -823,7 +823,7 @@ TEST(MacroAssemblerNativeSimple) {
   CHECK_EQ(-1, captures[3]);
 
   input = factory->NewStringFromAscii(CStrVector("barbarbar"));
-  seq_input = Handle<SeqAsciiString>::cast(input);
+  seq_input = Handle<SeqOneByteString>::cast(input);
   start_adr = seq_input->GetCharsAddress();
 
   result = Execute(*code,
@@ -924,7 +924,7 @@ TEST(MacroAssemblerNativeBacktrack) {
   Handle<Code> code = Handle<Code>::cast(code_object);
 
   Handle<String> input = factory->NewStringFromAscii(CStrVector("foofoo"));
-  Handle<SeqAsciiString> seq_input = Handle<SeqAsciiString>::cast(input);
+  Handle<SeqOneByteString> seq_input = Handle<SeqOneByteString>::cast(input);
   Address start_adr = seq_input->GetCharsAddress();
 
   NativeRegExpMacroAssembler::Result result =
@@ -967,7 +967,7 @@ TEST(MacroAssemblerNativeBackReferenceASCII) {
   Handle<Code> code = Handle<Code>::cast(code_object);
 
   Handle<String> input = factory->NewStringFromAscii(CStrVector("fooofo"));
-  Handle<SeqAsciiString> seq_input = Handle<SeqAsciiString>::cast(input);
+  Handle<SeqOneByteString> seq_input = Handle<SeqOneByteString>::cast(input);
   Address start_adr = seq_input->GetCharsAddress();
 
   int output[4];
@@ -1072,7 +1072,7 @@ TEST(MacroAssemblernativeAtStart) {
   Handle<Code> code = Handle<Code>::cast(code_object);
 
   Handle<String> input = factory->NewStringFromAscii(CStrVector("foobar"));
-  Handle<SeqAsciiString> seq_input = Handle<SeqAsciiString>::cast(input);
+  Handle<SeqOneByteString> seq_input = Handle<SeqOneByteString>::cast(input);
   Address start_adr = seq_input->GetCharsAddress();
 
   NativeRegExpMacroAssembler::Result result =
@@ -1133,7 +1133,7 @@ TEST(MacroAssemblerNativeBackRefNoCase) {
 
   Handle<String> input =
       factory->NewStringFromAscii(CStrVector("aBcAbCABCxYzab"));
-  Handle<SeqAsciiString> seq_input = Handle<SeqAsciiString>::cast(input);
+  Handle<SeqOneByteString> seq_input = Handle<SeqOneByteString>::cast(input);
   Address start_adr = seq_input->GetCharsAddress();
 
   int output[4];
@@ -1234,7 +1234,7 @@ TEST(MacroAssemblerNativeRegisters) {
   // String long enough for test (content doesn't matter).
   Handle<String> input =
       factory->NewStringFromAscii(CStrVector("foofoofoofoofoo"));
-  Handle<SeqAsciiString> seq_input = Handle<SeqAsciiString>::cast(input);
+  Handle<SeqOneByteString> seq_input = Handle<SeqOneByteString>::cast(input);
   Address start_adr = seq_input->GetCharsAddress();
 
   int output[6];
@@ -1278,7 +1278,7 @@ TEST(MacroAssemblerStackOverflow) {
   // String long enough for test (content doesn't matter).
   Handle<String> input =
       factory->NewStringFromAscii(CStrVector("dummy"));
-  Handle<SeqAsciiString> seq_input = Handle<SeqAsciiString>::cast(input);
+  Handle<SeqOneByteString> seq_input = Handle<SeqOneByteString>::cast(input);
   Address start_adr = seq_input->GetCharsAddress();
 
   NativeRegExpMacroAssembler::Result result =
@@ -1325,7 +1325,7 @@ TEST(MacroAssemblerNativeLotsOfRegisters) {
   // String long enough for test (content doesn't matter).
   Handle<String> input =
       factory->NewStringFromAscii(CStrVector("sample text"));
-  Handle<SeqAsciiString> seq_input = Handle<SeqAsciiString>::cast(input);
+  Handle<SeqOneByteString> seq_input = Handle<SeqOneByteString>::cast(input);
   Address start_adr = seq_input->GetCharsAddress();
 
   int captures[2];
diff --git a/deps/v8/test/cctest/test-serialize.cc b/deps/v8/test/cctest/test-serialize.cc
index c4654868aa..8279182497 100644
--- a/deps/v8/test/cctest/test-serialize.cc
+++ b/deps/v8/test/cctest/test-serialize.cc
@@ -196,8 +196,7 @@ class FileByteSink : public SnapshotByteSink {
       int data_space_used,
       int code_space_used,
       int map_space_used,
-      int cell_space_used,
-      int large_space_used);
+      int cell_space_used);
 
  private:
   FILE* fp_;
@@ -211,8 +210,7 @@ void FileByteSink::WriteSpaceUsed(
       int data_space_used,
       int code_space_used,
       int map_space_used,
-      int cell_space_used,
-      int large_space_used) {
+      int cell_space_used) {
   int file_name_length = StrLength(file_name_) + 10;
   Vector<char> name = Vector<char>::New(file_name_length + 1);
   OS::SNPrintF(name, "%s.size", file_name_);
@@ -224,7 +222,6 @@ void FileByteSink::WriteSpaceUsed(
   fprintf(fp, "code %d\n", code_space_used);
   fprintf(fp, "map %d\n", map_space_used);
   fprintf(fp, "cell %d\n", cell_space_used);
-  fprintf(fp, "large %d\n", large_space_used);
   fclose(fp);
 }
 
@@ -233,6 +230,15 @@ static bool WriteToFile(const char* snapshot_file) {
   FileByteSink file(snapshot_file);
   StartupSerializer ser(&file);
   ser.Serialize();
+
+  file.WriteSpaceUsed(
+      ser.CurrentAllocationAddress(NEW_SPACE),
+      ser.CurrentAllocationAddress(OLD_POINTER_SPACE),
+      ser.CurrentAllocationAddress(OLD_DATA_SPACE),
+      ser.CurrentAllocationAddress(CODE_SPACE),
+      ser.CurrentAllocationAddress(MAP_SPACE),
+      ser.CurrentAllocationAddress(CELL_SPACE));
+
   return true;
 }
 
@@ -279,7 +285,7 @@ static void Deserialize() {
 
 static void SanityCheck() {
   v8::HandleScope scope;
-#ifdef DEBUG
+#ifdef VERIFY_HEAP
   HEAP->Verify();
 #endif
   CHECK(Isolate::Current()->global_object()->IsJSObject());
@@ -384,7 +390,6 @@ TEST(PartialSerialization) {
     env.Dispose();
 
     FileByteSink startup_sink(startup_name.start());
-    startup_name.Dispose();
     StartupSerializer startup_serializer(&startup_sink);
     startup_serializer.SerializeStrongReferences();
 
@@ -392,26 +397,35 @@ TEST(PartialSerialization) {
     PartialSerializer p_ser(&startup_serializer, &partial_sink);
     p_ser.Serialize(&raw_foo);
     startup_serializer.SerializeWeakReferences();
+
     partial_sink.WriteSpaceUsed(
         p_ser.CurrentAllocationAddress(NEW_SPACE),
         p_ser.CurrentAllocationAddress(OLD_POINTER_SPACE),
         p_ser.CurrentAllocationAddress(OLD_DATA_SPACE),
         p_ser.CurrentAllocationAddress(CODE_SPACE),
         p_ser.CurrentAllocationAddress(MAP_SPACE),
-        p_ser.CurrentAllocationAddress(CELL_SPACE),
-        p_ser.CurrentAllocationAddress(LO_SPACE));
+        p_ser.CurrentAllocationAddress(CELL_SPACE));
+
+    startup_sink.WriteSpaceUsed(
+        startup_serializer.CurrentAllocationAddress(NEW_SPACE),
+        startup_serializer.CurrentAllocationAddress(OLD_POINTER_SPACE),
+        startup_serializer.CurrentAllocationAddress(OLD_DATA_SPACE),
+        startup_serializer.CurrentAllocationAddress(CODE_SPACE),
+        startup_serializer.CurrentAllocationAddress(MAP_SPACE),
+        startup_serializer.CurrentAllocationAddress(CELL_SPACE));
+    startup_name.Dispose();
   }
 }
 
 
-static void ReserveSpaceForPartialSnapshot(const char* file_name) {
+static void ReserveSpaceForSnapshot(Deserializer* deserializer,
+                                    const char* file_name) {
   int file_name_length = StrLength(file_name) + 10;
   Vector<char> name = Vector<char>::New(file_name_length + 1);
   OS::SNPrintF(name, "%s.size", file_name);
   FILE* fp = OS::FOpen(name.start(), "r");
   name.Dispose();
   int new_size, pointer_size, data_size, code_size, map_size, cell_size;
-  int large_size;
 #ifdef _MSC_VER
   // Avoid warning about unsafe fscanf from MSVC.
   // Please note that this is only fine if %c and %s are not being used.
@@ -423,18 +437,16 @@ static void ReserveSpaceForPartialSnapshot(const char* file_name) {
   CHECK_EQ(1, fscanf(fp, "code %d\n", &code_size));
   CHECK_EQ(1, fscanf(fp, "map %d\n", &map_size));
   CHECK_EQ(1, fscanf(fp, "cell %d\n", &cell_size));
-  CHECK_EQ(1, fscanf(fp, "large %d\n", &large_size));
 #ifdef _MSC_VER
 #undef fscanf
 #endif
   fclose(fp);
-  HEAP->ReserveSpace(new_size,
-                     pointer_size,
-                     data_size,
-                     code_size,
-                     map_size,
-                     cell_size,
-                     large_size);
+  deserializer->set_reservation(NEW_SPACE, new_size);
+  deserializer->set_reservation(OLD_POINTER_SPACE, pointer_size);
+  deserializer->set_reservation(OLD_DATA_SPACE, data_size);
+  deserializer->set_reservation(CODE_SPACE, code_size);
+  deserializer->set_reservation(MAP_SPACE, map_size);
+  deserializer->set_reservation(CELL_SPACE, cell_size);
 }
 
 
@@ -448,7 +460,6 @@ DEPENDENT_TEST(PartialDeserialization, PartialSerialization) {
     startup_name.Dispose();
 
     const char* file_name = FLAG_testing_serialization_file;
-    ReserveSpaceForPartialSnapshot(file_name);
 
     int snapshot_size = 0;
     byte* snapshot = ReadBytes(file_name, &snapshot_size);
@@ -457,18 +468,19 @@ DEPENDENT_TEST(PartialDeserialization, PartialSerialization) {
     {
       SnapshotByteSource source(snapshot, snapshot_size);
       Deserializer deserializer(&source);
+      ReserveSpaceForSnapshot(&deserializer, file_name);
       deserializer.DeserializePartial(&root);
       CHECK(root->IsString());
     }
     v8::HandleScope handle_scope;
     Handle<Object> root_handle(root);
 
-    ReserveSpaceForPartialSnapshot(file_name);
 
     Object* root2;
     {
       SnapshotByteSource source(snapshot, snapshot_size);
       Deserializer deserializer(&source);
+      ReserveSpaceForSnapshot(&deserializer, file_name);
       deserializer.DeserializePartial(&root2);
       CHECK(root2->IsString());
       CHECK(*root_handle == root2);
@@ -506,7 +518,6 @@ TEST(ContextSerialization) {
     env.Dispose();
 
     FileByteSink startup_sink(startup_name.start());
-    startup_name.Dispose();
     StartupSerializer startup_serializer(&startup_sink);
     startup_serializer.SerializeStrongReferences();
 
@@ -514,14 +525,23 @@ TEST(ContextSerialization) {
     PartialSerializer p_ser(&startup_serializer, &partial_sink);
     p_ser.Serialize(&raw_context);
     startup_serializer.SerializeWeakReferences();
+
     partial_sink.WriteSpaceUsed(
         p_ser.CurrentAllocationAddress(NEW_SPACE),
         p_ser.CurrentAllocationAddress(OLD_POINTER_SPACE),
         p_ser.CurrentAllocationAddress(OLD_DATA_SPACE),
         p_ser.CurrentAllocationAddress(CODE_SPACE),
         p_ser.CurrentAllocationAddress(MAP_SPACE),
-        p_ser.CurrentAllocationAddress(CELL_SPACE),
-        p_ser.CurrentAllocationAddress(LO_SPACE));
+        p_ser.CurrentAllocationAddress(CELL_SPACE));
+
+    startup_sink.WriteSpaceUsed(
+        startup_serializer.CurrentAllocationAddress(NEW_SPACE),
+        startup_serializer.CurrentAllocationAddress(OLD_POINTER_SPACE),
+        startup_serializer.CurrentAllocationAddress(OLD_DATA_SPACE),
+        startup_serializer.CurrentAllocationAddress(CODE_SPACE),
+        startup_serializer.CurrentAllocationAddress(MAP_SPACE),
+        startup_serializer.CurrentAllocationAddress(CELL_SPACE));
+    startup_name.Dispose();
   }
 }
 
@@ -536,7 +556,6 @@ DEPENDENT_TEST(ContextDeserialization, ContextSerialization) {
     startup_name.Dispose();
 
     const char* file_name = FLAG_testing_serialization_file;
-    ReserveSpaceForPartialSnapshot(file_name);
 
     int snapshot_size = 0;
     byte* snapshot = ReadBytes(file_name, &snapshot_size);
@@ -545,18 +564,19 @@ DEPENDENT_TEST(ContextDeserialization, ContextSerialization) {
     {
       SnapshotByteSource source(snapshot, snapshot_size);
       Deserializer deserializer(&source);
+      ReserveSpaceForSnapshot(&deserializer, file_name);
       deserializer.DeserializePartial(&root);
       CHECK(root->IsContext());
     }
     v8::HandleScope handle_scope;
     Handle<Object> root_handle(root);
 
-    ReserveSpaceForPartialSnapshot(file_name);
 
     Object* root2;
     {
       SnapshotByteSource source(snapshot, snapshot_size);
       Deserializer deserializer(&source);
+      ReserveSpaceForSnapshot(&deserializer, file_name);
       deserializer.DeserializePartial(&root2);
       CHECK(root2->IsContext());
       CHECK(*root_handle != root2);
@@ -565,120 +585,6 @@ DEPENDENT_TEST(ContextDeserialization, ContextSerialization) {
 }
 
 
-TEST(LinearAllocation) {
-  v8::V8::Initialize();
-  int new_space_max = 512 * KB;
-  int paged_space_max = Page::kMaxNonCodeHeapObjectSize;
-  int code_space_max = HEAP->code_space()->AreaSize();
-
-  for (int size = 1000; size < 5 * MB; size += size >> 1) {
-    size &= ~8;  // Round.
-    int new_space_size = (size < new_space_max) ? size : new_space_max;
-    int paged_space_size = (size < paged_space_max) ? size : paged_space_max;
-    HEAP->ReserveSpace(
-        new_space_size,
-        paged_space_size,  // Old pointer space.
-        paged_space_size,  // Old data space.
-        HEAP->code_space()->RoundSizeDownToObjectAlignment(code_space_max),
-        HEAP->map_space()->RoundSizeDownToObjectAlignment(paged_space_size),
-        HEAP->cell_space()->RoundSizeDownToObjectAlignment(paged_space_size),
-        size);             // Large object space.
-    LinearAllocationScope linear_allocation_scope;
-    DisallowAllocationFailure disallow_allocation_failure;
-    const int kSmallFixedArrayLength = 4;
-    const int kSmallFixedArraySize =
-        FixedArray::kHeaderSize + kSmallFixedArrayLength * kPointerSize;
-    const int kSmallStringLength = 16;
-    const int kSmallStringSize =
-        (SeqAsciiString::kHeaderSize + kSmallStringLength +
-        kObjectAlignmentMask) & ~kObjectAlignmentMask;
-    const int kMapSize = Map::kSize;
-
-    Object* new_last = NULL;
-    for (int i = 0;
-         i + kSmallFixedArraySize <= new_space_size;
-         i += kSmallFixedArraySize) {
-      Object* obj =
-          HEAP->AllocateFixedArray(kSmallFixedArrayLength)->ToObjectChecked();
-      if (new_last != NULL) {
-        CHECK(reinterpret_cast<char*>(obj) ==
-              reinterpret_cast<char*>(new_last) + kSmallFixedArraySize);
-      }
-      new_last = obj;
-    }
-
-    Object* pointer_last = NULL;
-    for (int i = 0;
-         i + kSmallFixedArraySize <= paged_space_size;
-         i += kSmallFixedArraySize) {
-      Object* obj = HEAP->AllocateFixedArray(kSmallFixedArrayLength,
-                                             TENURED)->ToObjectChecked();
-      int old_page_fullness = i % Page::kPageSize;
-      int page_fullness = (i + kSmallFixedArraySize) % Page::kPageSize;
-      if (page_fullness < old_page_fullness ||
-          page_fullness > HEAP->old_pointer_space()->AreaSize()) {
-        i = RoundUp(i, Page::kPageSize);
-        pointer_last = NULL;
-      }
-      if (pointer_last != NULL) {
-        CHECK(reinterpret_cast<char*>(obj) ==
-              reinterpret_cast<char*>(pointer_last) + kSmallFixedArraySize);
-      }
-      pointer_last = obj;
-    }
-
-    Object* data_last = NULL;
-    for (int i = 0;
-         i + kSmallStringSize <= paged_space_size;
-         i += kSmallStringSize) {
-      Object* obj = HEAP->AllocateRawAsciiString(kSmallStringLength,
-                                                 TENURED)->ToObjectChecked();
-      int old_page_fullness = i % Page::kPageSize;
-      int page_fullness = (i + kSmallStringSize) % Page::kPageSize;
-      if (page_fullness < old_page_fullness ||
-          page_fullness > HEAP->old_data_space()->AreaSize()) {
-        i = RoundUp(i, Page::kPageSize);
-        data_last = NULL;
-      }
-      if (data_last != NULL) {
-        CHECK(reinterpret_cast<char*>(obj) ==
-              reinterpret_cast<char*>(data_last) + kSmallStringSize);
-      }
-      data_last = obj;
-    }
-
-    Object* map_last = NULL;
-    for (int i = 0; i + kMapSize <= paged_space_size; i += kMapSize) {
-      Object* obj = HEAP->AllocateMap(JS_OBJECT_TYPE,
-                                      42 * kPointerSize)->ToObjectChecked();
-      int old_page_fullness = i % Page::kPageSize;
-      int page_fullness = (i + kMapSize) % Page::kPageSize;
-      if (page_fullness < old_page_fullness ||
-          page_fullness > HEAP->map_space()->AreaSize()) {
-        i = RoundUp(i, Page::kPageSize);
-        map_last = NULL;
-      }
-      if (map_last != NULL) {
-        CHECK(reinterpret_cast<char*>(obj) ==
-              reinterpret_cast<char*>(map_last) + kMapSize);
-      }
-      map_last = obj;
-    }
-
-    if (size > Page::kMaxNonCodeHeapObjectSize) {
-      // Support for reserving space in large object space is not there yet,
-      // but using an always-allocate scope is fine for now.
-      AlwaysAllocateScope always;
-      int large_object_array_length =
-          (size - FixedArray::kHeaderSize) / kPointerSize;
-      Object* obj = HEAP->AllocateFixedArray(large_object_array_length,
-                                             TENURED)->ToObjectChecked();
-      CHECK(!obj->IsFailure());
-    }
-  }
-}
-
-
 TEST(TestThatAlwaysSucceeds) {
 }
 
diff --git a/deps/v8/test/cctest/test-sockets.cc b/deps/v8/test/cctest/test-sockets.cc
index ad7354002f..2f7941c6ed 100644
--- a/deps/v8/test/cctest/test-sockets.cc
+++ b/deps/v8/test/cctest/test-sockets.cc
@@ -124,7 +124,7 @@ static void SendAndReceive(int port, char *data, int len) {
 TEST(Socket) {
   // Make sure this port is not used by other tests to allow tests to run in
   // parallel.
-  static const int kPort = 5859;
+  static const int kPort = 5859 + FlagDependentPortOffset();
 
   bool ok;
 
diff --git a/deps/v8/test/cctest/test-weakmaps.cc b/deps/v8/test/cctest/test-weakmaps.cc
index 7bba7b6486..7c98c573c3 100644
--- a/deps/v8/test/cctest/test-weakmaps.cc
+++ b/deps/v8/test/cctest/test-weakmaps.cc
@@ -193,9 +193,10 @@ TEST(Regress2060a) {
 // other strong paths are correctly recorded in the slots buffer.
 TEST(Regress2060b) {
   FLAG_always_compact = true;
-#ifdef DEBUG
+#ifdef VERIFY_HEAP
   FLAG_verify_heap = true;
 #endif
+
   LocalContext context;
   v8::HandleScope scope;
   Handle<JSFunction> function =
diff --git a/deps/v8/test/cctest/testcfg.py b/deps/v8/test/cctest/testcfg.py
index 532edfc26d..69a5db2044 100644
--- a/deps/v8/test/cctest/testcfg.py
+++ b/deps/v8/test/cctest/testcfg.py
@@ -25,11 +25,70 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-import test
 import os
-from os.path import join, dirname, exists
-import platform
-import utils
+import shutil
+
+from testrunner.local import commands
+from testrunner.local import testsuite
+from testrunner.local import utils
+from testrunner.objects import testcase
+
+
+class CcTestSuite(testsuite.TestSuite):
+
+  def __init__(self, name, root):
+    super(CcTestSuite, self).__init__(name, root)
+    self.serdes_dir = os.path.normpath(
+        os.path.join(root, "..", "..", "out", ".serdes"))
+    if os.path.exists(self.serdes_dir):
+      shutil.rmtree(self.serdes_dir, True)
+    os.makedirs(self.serdes_dir)
+
+  def ListTests(self, context):
+    if utils.IsWindows():
+      shell += '.exe'
+    shell = os.path.abspath(os.path.join(context.shell_dir, self.shell()))
+    output = commands.Execute([context.command_prefix,
+                               shell,
+                               '--list',
+                               context.extra_flags])
+    if output.exit_code != 0:
+      print output.stdout
+      print output.stderr
+      return []
+    tests = []
+    for test_desc in output.stdout.strip().split():
+      raw_test, dependency = test_desc.split('<')
+      if dependency != '':
+        dependency = raw_test.split('/')[0] + '/' + dependency
+      else:
+        dependency = None
+      test = testcase.TestCase(self, raw_test, dependency=dependency)
+      tests.append(test)
+    tests.sort()
+    return tests
+
+  def GetFlagsForTestCase(self, testcase, context):
+    testname = testcase.path.split(os.path.sep)[-1]
+    serialization_file = os.path.join(self.serdes_dir, "serdes_" + testname)
+    serialization_file += ''.join(testcase.flags).replace('-', '_')
+    return (testcase.flags + [testcase.path] + context.mode_flags +
+            ["--testing_serialization_file=" + serialization_file])
+
+  def shell(self):
+    return "cctest"
+
+
+def GetSuite(name, root):
+  return CcTestSuite(name, root)
+
+
+# Deprecated definitions below.
+# TODO(jkummerow): Remove when SCons is no longer supported.
+
+
+from os.path import exists, join, normpath
+import test
 
 
 class CcTestCase(test.TestCase):
diff --git a/deps/v8/test/es5conform/testcfg.py b/deps/v8/test/es5conform/testcfg.py
index b6a17d9b69..7de990d387 100644
--- a/deps/v8/test/es5conform/testcfg.py
+++ b/deps/v8/test/es5conform/testcfg.py
@@ -31,6 +31,11 @@ import os
 from os.path import join, exists
 
 
+def GetSuite(name, root):
+  # Not implemented.
+  return None
+
+
 HARNESS_FILES = ['sth.js']
 
 
diff --git a/deps/v8/test/message/testcfg.py b/deps/v8/test/message/testcfg.py
index 9cb58264e0..1b788d561c 100644
--- a/deps/v8/test/message/testcfg.py
+++ b/deps/v8/test/message/testcfg.py
@@ -25,13 +25,93 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-import test
+import itertools
 import os
-from os.path import join, dirname, exists, basename, isdir
 import re
 
+from testrunner.local import testsuite
+from testrunner.local import utils
+from testrunner.objects import testcase
+
+
 FLAGS_PATTERN = re.compile(r"//\s+Flags:(.*)")
 
+
+class MessageTestSuite(testsuite.TestSuite):
+  def __init__(self, name, root):
+    super(MessageTestSuite, self).__init__(name, root)
+
+  def ListTests(self, context):
+    tests = []
+    for dirname, dirs, files in os.walk(self.root):
+      for dotted in [x for x in dirs if x.startswith('.')]:
+        dirs.remove(dotted)
+      dirs.sort()
+      files.sort()
+      for filename in files:
+        if filename.endswith(".js"):
+          testname = join(dirname[len(self.root) + 1:], filename[:-3])
+          test = testcase.TestCase(self, testname)
+          tests.append(test)
+    return tests
+
+  def GetFlagsForTestCase(self, testcase, context):
+    source = self.GetSourceForTest(testcase)
+    result = []
+    flags_match = re.findall(FLAGS_PATTERN, source)
+    for match in flags_match:
+      result += match.strip().split()
+    result += context.mode_flags
+    result.append(os.path.join(self.root, testcase.path + ".js"))
+    return testcase.flags + result
+
+  def GetSourceForTest(self, testcase):
+    filename = os.path.join(self.root, testcase.path + self.suffix())
+    with open(filename) as f:
+      return f.read()
+
+  def _IgnoreLine(self, string):
+    """Ignore empty lines, valgrind output and Android output."""
+    if not string: return True
+    return (string.startswith("==") or string.startswith("**") or
+            string.startswith("ANDROID"))
+
+  def IsFailureOutput(self, output, testpath):
+    expected_path = os.path.join(self.root, testpath + ".out")
+    expected_lines = []
+    # Can't use utils.ReadLinesFrom() here because it strips whitespace.
+    with open(expected_path) as f:
+      for line in f:
+        if line.startswith("#") or not line.strip(): continue
+        expected_lines.append(line)
+    raw_lines = output.stdout.splitlines()
+    actual_lines = [ s for s in raw_lines if not self._IgnoreLine(s) ]
+    env = { "basename": os.path.basename(testpath + ".js") }
+    if len(expected_lines) != len(actual_lines):
+      return True
+    for (expected, actual) in itertools.izip(expected_lines, actual_lines):
+      pattern = re.escape(expected.rstrip() % env)
+      pattern = pattern.replace("\\*", ".*")
+      pattern = "^%s$" % pattern
+      if not re.match(pattern, actual):
+        return True
+    return False
+
+  def StripOutputForTransmit(self, testcase):
+    pass
+
+
+def GetSuite(name, root):
+  return MessageTestSuite(name, root)
+
+
+# Deprecated definitions below.
+# TODO(jkummerow): Remove when SCons is no longer supported.
+
+
+import test
+from os.path import join, exists, basename, isdir
+
 class MessageTestCase(test.TestCase):
 
   def __init__(self, path, file, expected, mode, context, config):
diff --git a/deps/v8/test/message/try-catch-finally-no-message.out b/deps/v8/test/message/try-catch-finally-no-message.out
index d85fc7d027..f59f5c6a67 100644
--- a/deps/v8/test/message/try-catch-finally-no-message.out
+++ b/deps/v8/test/message/try-catch-finally-no-message.out
@@ -1,26 +1,26 @@
-// Copyright 2008 the V8 project authors. All rights reserved.
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-//       notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-//       copyright notice, this list of conditions and the following
-//       disclaimer in the documentation and/or other materials provided
-//       with the distribution.
-//     * Neither the name of Google Inc. nor the names of its
-//       contributors may be used to endorse or promote products derived
-//       from this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+# Copyright 2008 the V8 project authors. All rights reserved.
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+#       notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+#       copyright notice, this list of conditions and the following
+#       disclaimer in the documentation and/or other materials provided
+#       with the distribution.
+#     * Neither the name of Google Inc. nor the names of its
+#       contributors may be used to endorse or promote products derived
+#       from this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/deps/v8/test/mjsunit/array-bounds-check-removal.js b/deps/v8/test/mjsunit/array-bounds-check-removal.js
index 0ab3096326..df7988bdaa 100644
--- a/deps/v8/test/mjsunit/array-bounds-check-removal.js
+++ b/deps/v8/test/mjsunit/array-bounds-check-removal.js
@@ -29,6 +29,29 @@
 
 var a = new Int32Array(1024);
 
+// Test that we do not assert if the accessed index has not an int32 rep.
+var v = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9];
+function test_do_not_assert_on_non_int32(vector, base) {
+  var r = 0;
+  var a1 = base + 1;
+  var a2 = base + 2;
+  var a3 = base + 3;
+  var a4 = base + 4;
+  if (a1 == 2) {
+    r += vector[a1];
+    r += vector[a4];
+    r += vector[a2];
+    r += vector[a3];
+  }
+  return r;
+}
+test_do_not_assert_on_non_int32(v,1);
+test_do_not_assert_on_non_int32(v,1);
+test_do_not_assert_on_non_int32(v,"a");
+test_do_not_assert_on_non_int32(v,"a");
+%OptimizeFunctionOnNextCall(test_do_not_assert_on_non_int32);
+test_do_not_assert_on_non_int32(v,0);
+
 function test_base(base,cond) {
   a[base + 1] = 1;
   a[base + 4] = 2;
diff --git a/deps/v8/test/mjsunit/array-natives-elements.js b/deps/v8/test/mjsunit/array-natives-elements.js
new file mode 100644
index 0000000000..96a8cb5d19
--- /dev/null
+++ b/deps/v8/test/mjsunit/array-natives-elements.js
@@ -0,0 +1,307 @@
+// Copyright 2012 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Flags: --allow-natives-syntax --smi-only-arrays
+// Flags: --noparallel-recompilation
+
+// Test element kind of objects.
+// Since --smi-only-arrays affects builtins, its default setting at compile time
+// sticks if built with snapshot. If --smi-only-arrays is deactivated by
+// default, only a no-snapshot build actually has smi-only arrays enabled in
+// this test case. Depending on whether smi-only arrays are actually enabled,
+// this test takes the appropriate code path to check smi-only arrays.
+
+support_smi_only_arrays = %HasFastSmiElements([1,2,3,4,5,6,7,8,9,10]);
+
+if (support_smi_only_arrays) {
+  print("Tests include smi-only arrays.");
+} else {
+  print("Tests do NOT include smi-only arrays.");
+}
+
+// IC and Crankshaft support for smi-only elements in dynamic array literals.
+function get(foo) { return foo; }  // Used to generate dynamic values.
+
+function array_natives_test() {
+
+  // Ensure small array literals start in specific element kind mode.
+  assertTrue(%HasFastSmiElements([]));
+  assertTrue(%HasFastSmiElements([1]));
+  assertTrue(%HasFastSmiElements([1,2]));
+  assertTrue(%HasFastDoubleElements([1.1]));
+  assertTrue(%HasFastDoubleElements([1.1,2]));
+
+  // Push
+  var a0 = [1, 2, 3];
+  assertTrue(%HasFastSmiElements(a0));
+  a0.push(4);
+  assertTrue(%HasFastSmiElements(a0));
+  a0.push(1.3);
+  assertTrue(%HasFastDoubleElements(a0));
+  a0.push(1.5);
+  assertTrue(%HasFastDoubleElements(a0));
+  a0.push({});
+  assertTrue(%HasFastObjectElements(a0));
+  a0.push({});
+  assertTrue(%HasFastObjectElements(a0));
+  assertEquals([1,2,3,4,1.3,1.5,{},{}], a0);
+
+  // Concat
+  var a1;
+  a1 = [1,2,3].concat([]);
+  assertTrue(%HasFastSmiElements(a1));
+  assertEquals([1,2,3], a1);
+  a1 = [1,2,3].concat([4,5,6]);
+  assertTrue(%HasFastSmiElements(a1));
+  assertEquals([1,2,3,4,5,6], a1);
+  a1 = [1,2,3].concat([4,5,6], [7,8,9]);
+  assertTrue(%HasFastSmiElements(a1));
+  assertEquals([1,2,3,4,5,6,7,8,9], a1);
+  a1 = [1.1,2,3].concat([]);
+  assertTrue(%HasFastDoubleElements(a1));
+  assertEquals([1.1,2,3], a1);
+  a1 = [1,2,3].concat([1.1, 2]);
+  assertTrue(%HasFastDoubleElements(a1));
+  assertEquals([1,2,3,1.1,2], a1);
+  a1 = [1.1,2,3].concat([1, 2]);
+  assertTrue(%HasFastDoubleElements(a1));
+  assertEquals([1.1,2,3,1,2], a1);
+  a1 = [1.1,2,3].concat([1.2, 2]);
+  assertTrue(%HasFastDoubleElements(a1));
+  assertEquals([1.1,2,3,1.2,2], a1);
+
+  a1 = [1,2,3].concat([{}]);
+  assertTrue(%HasFastObjectElements(a1));
+  assertEquals([1,2,3,{}], a1);
+  a1 = [1.1,2,3].concat([{}]);
+  assertTrue(%HasFastObjectElements(a1));
+  assertEquals([1.1,2,3,{}], a1);
+  a1 = [{}].concat([1,2,3]);
+  assertTrue(%HasFastObjectElements(a1));
+  assertEquals([{},1,2,3], a1);
+  a1 = [{}].concat([1.1,2,3]);
+  assertTrue(%HasFastObjectElements(a1));
+  assertEquals([{},1.1,2,3], a1);
+
+  // Slice
+  var a2 = [1,2,3];
+  assertTrue(%HasFastSmiElements(a2.slice()));
+  assertTrue(%HasFastSmiElements(a2.slice(1)));
+  assertTrue(%HasFastSmiElements(a2.slice(1, 2)));
+  assertEquals([1,2,3], a2.slice());
+  assertEquals([2,3], a2.slice(1));
+  assertEquals([2], a2.slice(1,2));
+  a2 = [1.1,2,3];
+  assertTrue(%HasFastDoubleElements(a2.slice()));
+  assertTrue(%HasFastDoubleElements(a2.slice(1)));
+  assertTrue(%HasFastDoubleElements(a2.slice(1, 2)));
+  assertEquals([1.1,2,3], a2.slice());
+  assertEquals([2,3], a2.slice(1));
+  assertEquals([2], a2.slice(1,2));
+  a2 = [{},2,3];
+  assertTrue(%HasFastObjectElements(a2.slice()));
+  assertTrue(%HasFastObjectElements(a2.slice(1)));
+  assertTrue(%HasFastObjectElements(a2.slice(1, 2)));
+  assertEquals([{},2,3], a2.slice());
+  assertEquals([2,3], a2.slice(1));
+  assertEquals([2], a2.slice(1,2));
+
+  // Splice
+  var a3 = [1,2,3];
+  var a3r;
+  a3r = a3.splice(0, 0);
+  assertTrue(%HasFastSmiElements(a3r));
+  assertTrue(%HasFastSmiElements(a3));
+  assertEquals([], a3r);
+  assertEquals([1, 2, 3], a3);
+  a3 = [1,2,3];
+  a3r = a3.splice(0, 1);
+  assertTrue(%HasFastSmiElements(a3r));
+  assertTrue(%HasFastSmiElements(a3));
+  assertEquals([1], a3r);
+  assertEquals([2, 3], a3);
+  a3 = [1,2,3];
+  a3r = a3.splice(0, 0, 2);
+  assertTrue(%HasFastSmiElements(a3r));
+  assertTrue(%HasFastSmiElements(a3));
+  assertEquals([], a3r);
+  assertEquals([2, 1, 2, 3], a3);
+  a3 = [1,2,3];
+  a3r = a3.splice(0, 1, 2);
+  assertTrue(%HasFastSmiElements(a3r));
+  assertTrue(%HasFastSmiElements(a3));
+  assertEquals([1], a3r);
+  assertEquals([2, 2, 3], a3);
+
+  a3 = [1.1,2,3];
+  a3r = a3.splice(0, 0);
+  assertTrue(%HasFastDoubleElements(a3r));
+  assertTrue(%HasFastDoubleElements(a3));
+  assertEquals([], a3r);
+  assertEquals([1.1, 2, 3], a3);
+  a3 = [1.1,2,3];
+  a3r = a3.splice(0, 1);
+  assertTrue(%HasFastDoubleElements(a3r));
+  assertTrue(%HasFastDoubleElements(a3));
+  assertEquals([1.1], a3r);
+  assertEquals([2, 3], a3);
+  a3 = [1.1,2,3];
+  a3r = a3.splice(0, 0, 2);
+  // Commented out since handled in js, which takes the best fit.
+  // assertTrue(%HasFastDoubleElements(a3r));
+  assertTrue(%HasFastSmiElements(a3r));
+  assertTrue(%HasFastDoubleElements(a3));
+  assertEquals([], a3r);
+  assertEquals([2, 1.1, 2, 3], a3);
+  a3 = [1.1,2,3];
+  a3r = a3.splice(0, 1, 2);
+  assertTrue(%HasFastDoubleElements(a3r));
+  assertTrue(%HasFastDoubleElements(a3));
+  assertEquals([1.1], a3r);
+  assertEquals([2, 2, 3], a3);
+  a3 = [1.1,2,3];
+  a3r = a3.splice(0, 0, 2.1);
+  // Commented out since handled in js, which takes the best fit.
+  // assertTrue(%HasFastDoubleElements(a3r));
+  assertTrue(%HasFastSmiElements(a3r));
+  assertTrue(%HasFastDoubleElements(a3));
+  assertEquals([], a3r);
+  assertEquals([2.1, 1.1, 2, 3], a3);
+  a3 = [1.1,2,3];
+  a3r = a3.splice(0, 1, 2.2);
+  assertTrue(%HasFastDoubleElements(a3r));
+  assertTrue(%HasFastDoubleElements(a3));
+  assertEquals([1.1], a3r);
+  assertEquals([2.2, 2, 3], a3);
+  a3 = [1,2,3];
+  a3r = a3.splice(0, 0, 2.1);
+  // Commented out since handled in js, which takes the best fit.
+  // assertTrue(%HasFastDoubleElements(a3r));
+  assertTrue(%HasFastSmiElements(a3r));
+  assertTrue(%HasFastDoubleElements(a3));
+  assertEquals([], a3r);
+  assertEquals([2.1, 1, 2, 3], a3);
+  a3 = [1,2,3];
+  a3r = a3.splice(0, 1, 2.2);
+  assertTrue(%HasFastDoubleElements(a3r));
+  assertTrue(%HasFastDoubleElements(a3));
+  assertEquals([1], a3r);
+  assertEquals([2.2, 2, 3], a3);
+
+  a3 = [{},2,3];
+  a3r = a3.splice(0, 0);
+  assertTrue(%HasFastObjectElements(a3r));
+  assertTrue(%HasFastObjectElements(a3));
+  assertEquals([], a3r);
+  assertEquals([{}, 2, 3], a3);
+  a3 = [1,2,{}];
+  a3r = a3.splice(0, 1);
+  assertTrue(%HasFastObjectElements(a3r));
+  assertTrue(%HasFastObjectElements(a3));
+  assertEquals([1], a3r);
+  assertEquals([2, {}], a3);
+  a3 = [1,2,3];
+  a3r = a3.splice(0, 0, {});
+  assertTrue(%HasFastObjectElements(a3r));
+  assertTrue(%HasFastObjectElements(a3));
+  assertEquals([], a3r);
+  assertEquals([{}, 1, 2, 3], a3);
+  a3 = [1,2,3];
+  a3r = a3.splice(0, 1, {});
+  assertTrue(%HasFastObjectElements(a3r));
+  assertTrue(%HasFastObjectElements(a3));
+  assertEquals([1], a3r);
+  assertEquals([{}, 2, 3], a3);
+
+  a3 = [1.1,2,3];
+  a3r = a3.splice(0, 0, {});
+  assertTrue(%HasFastObjectElements(a3r));
+  assertTrue(%HasFastObjectElements(a3));
+  assertEquals([], a3r);
+  assertEquals([{}, 1.1, 2, 3], a3);
+  a3 = [1.1,2,3];
+  a3r = a3.splice(0, 1, {});
+  assertTrue(%HasFastObjectElements(a3r));
+  assertTrue(%HasFastObjectElements(a3));
+  assertEquals([1.1], a3r);
+  assertEquals([{}, 2, 3], a3);
+
+  // Pop
+  var a4 = [1,2,3];
+  assertEquals(3, a4.pop());
+  assertTrue(%HasFastSmiElements(a4));
+  a4 = [1.1,2,3];
+  assertEquals(3, a4.pop());
+  assertTrue(%HasFastDoubleElements(a4));
+  a4 = [{},2,3];
+  assertEquals(3, a4.pop());
+  assertTrue(%HasFastObjectElements(a4));
+
+  // Shift
+  var a4 = [1,2,3];
+  assertEquals(1, a4.shift());
+  assertTrue(%HasFastSmiElements(a4));
+  a4 = [1.1,2,3];
+  assertEquals(1.1, a4.shift());
+  assertTrue(%HasFastDoubleElements(a4));
+  a4 = [{},2,3];
+  assertEquals({}, a4.shift());
+  assertTrue(%HasFastObjectElements(a4));
+
+  // Unshift
+  var a4 = [1,2,3];
+  a4.unshift(1);
+  assertTrue(%HasFastSmiElements(a4));
+  assertEquals([1,1,2,3], a4);
+  a4 = [1,2,3];
+  a4.unshift(1.1);
+  // TODO(verwaest): We'll want to support double unshifting as well.
+  // assertTrue(%HasFastDoubleElements(a4));
+  assertTrue(%HasFastObjectElements(a4));
+  assertEquals([1.1,1,2,3], a4);
+  a4 = [1.1,2,3];
+  a4.unshift(1);
+  // assertTrue(%HasFastDoubleElements(a4));
+  assertTrue(%HasFastObjectElements(a4));
+  assertEquals([1,1.1,2,3], a4);
+  a4 = [{},2,3];
+  a4.unshift(1);
+  assertTrue(%HasFastObjectElements(a4));
+  assertEquals([1,{},2,3], a4);
+  a4 = [{},2,3];
+  a4.unshift(1.1);
+  assertTrue(%HasFastObjectElements(a4));
+  assertEquals([1.1,{},2,3], a4);
+}
+
+if (support_smi_only_arrays) {
+  for (var i = 0; i < 3; i++) {
+    array_natives_test();
+  }
+  %OptimizeFunctionOnNextCall(array_natives_test);
+  array_natives_test();
+}
diff --git a/deps/v8/test/mjsunit/array-reduce.js b/deps/v8/test/mjsunit/array-reduce.js
index 1e96188265..429f34808d 100755
--- a/deps/v8/test/mjsunit/array-reduce.js
+++ b/deps/v8/test/mjsunit/array-reduce.js
@@ -418,8 +418,8 @@ try {
   exception = true;
   assertTrue(e instanceof TypeError,
              "reduce callback not a function not throwing TypeError");
-  assertEquals("called_non_callable", e.type,
-               "reduce non function TypeError type");
+  assertTrue(e.message.indexOf(" is not a function") >= 0,
+             "reduce non function TypeError type");
 }
 assertTrue(exception);
 
@@ -430,8 +430,8 @@ try {
   exception = true;
   assertTrue(e instanceof TypeError,
              "reduceRight callback not a function not throwing TypeError");
-  assertEquals("called_non_callable", e.type,
-               "reduceRight non function TypeError type");
+  assertTrue(e.message.indexOf(" is not a function") >= 0,
+             "reduceRight non function TypeError type");
 }
 assertTrue(exception);
 
@@ -442,7 +442,7 @@ try {
   exception = true;
   assertTrue(e instanceof TypeError,
              "reduce no initial value not throwing TypeError");
-  assertEquals("reduce_no_initial", e.type,
+  assertEquals("Reduce of empty array with no initial value", e.message,
                "reduce no initial TypeError type");
 }
 assertTrue(exception);
@@ -454,7 +454,7 @@ try {
   exception = true;
   assertTrue(e instanceof TypeError,
              "reduceRight no initial value not throwing TypeError");
-  assertEquals("reduce_no_initial", e.type,
+  assertEquals("Reduce of empty array with no initial value", e.message,
                "reduceRight no initial TypeError type");
 }
 assertTrue(exception);
@@ -466,7 +466,7 @@ try {
   exception = true;
   assertTrue(e instanceof TypeError,
              "reduce sparse no initial value not throwing TypeError");
-  assertEquals("reduce_no_initial", e.type,
+  assertEquals("Reduce of empty array with no initial value", e.message,
                "reduce no initial TypeError type");
 }
 assertTrue(exception);
@@ -478,7 +478,7 @@ try {
   exception = true;
   assertTrue(e instanceof TypeError,
              "reduceRight sparse no initial value not throwing TypeError");
-  assertEquals("reduce_no_initial", e.type,
+  assertEquals("Reduce of empty array with no initial value", e.message,
                "reduceRight no initial TypeError type");
 }
 assertTrue(exception);
diff --git a/deps/v8/test/mjsunit/array-slice.js b/deps/v8/test/mjsunit/array-slice.js
index 5ae31dc527..ae0e3bc1ef 100644
--- a/deps/v8/test/mjsunit/array-slice.js
+++ b/deps/v8/test/mjsunit/array-slice.js
@@ -290,3 +290,15 @@
 
   func('a', 'b', 'c');
 })();
+
+// Check slicing of holey objects with elements in the prototype
+(function() {
+  function f() {
+    delete arguments[1];
+    arguments.__proto__[1] = 5;
+    var result = Array.prototype.slice.call(arguments);
+    delete arguments.__proto__[1];
+    assertEquals([1,5,3], result);
+  }
+  f(1,2,3);
+})();
diff --git a/deps/v8/test/mjsunit/array-store-and-grow.js b/deps/v8/test/mjsunit/array-store-and-grow.js
index 131d4ebc51..88f3db8f64 100644
--- a/deps/v8/test/mjsunit/array-store-and-grow.js
+++ b/deps/v8/test/mjsunit/array-store-and-grow.js
@@ -99,7 +99,10 @@ array_store_5(a, 1, 0.5);
 a = makeCOW();
 array_store_5(a, 1, 0.5);
 assertEquals(0.5, a[1]);
-assertEquals(0.5, array_store_5([], 1, 0.5));
+a = [];
+assertEquals(0.5, array_store_5(a, 1, 0.5));
+assertEquals(undefined, a[0]);
+assertEquals(0.5, a[1]);
 
 function array_store_6(a,b,c) {
   return (a[b] = c);
diff --git a/deps/v8/test/mjsunit/bugs/bug-2337.js b/deps/v8/test/mjsunit/bugs/bug-2337.js
new file mode 100644
index 0000000000..ebf7621c45
--- /dev/null
+++ b/deps/v8/test/mjsunit/bugs/bug-2337.js
@@ -0,0 +1,53 @@
+// Copyright 2012 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Flags: --expose-debug-as debug --expose-gc
+
+// If one callback causes a GC then the other callbacks don't take place.
+
+var f = eval("(function f() { return 42; })");
+var f2 = eval("(function f2() { return 43; })");
+
+Debug = debug.Debug;
+
+var called = 0;
+
+function listener(event, exec_state, event_data, data) {
+  if (event == Debug.DebugEvent.ScriptCollected) {
+    if (called != 2) {
+      called++;
+      gc();
+    }
+  }
+};
+
+Debug.scripts();
+Debug.setListener(listener);
+f = void 0;
+f2 = void 0;
+gc();
+assertTrue(called == 2);
diff --git a/deps/v8/test/mjsunit/compiler/inline-arguments.js b/deps/v8/test/mjsunit/compiler/inline-arguments.js
index 572340ab6b..df1bd2214d 100644
--- a/deps/v8/test/mjsunit/compiler/inline-arguments.js
+++ b/deps/v8/test/mjsunit/compiler/inline-arguments.js
@@ -25,7 +25,7 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-// Flags: --allow-natives-syntax
+// Flags: --allow-natives-syntax --max-opt-count=100
 
 function A() {
 }
@@ -157,9 +157,8 @@ function test_toarr(toarr) {
 test_toarr(toarr1);
 test_toarr(toarr2);
 
+
 // Test that arguments access from inlined function uses correct values.
-// TODO(mstarzinger): Tests disabled, see bug 2261
-/*
 (function () {
   function inner(x, y) {
     "use strict";
@@ -204,4 +203,66 @@ test_toarr(toarr2);
   %OptimizeFunctionOnNextCall(outer);
   assertEquals(2, outer(1, 2));
 })();
-*/
+
+
+// Test inlining and deoptimization of functions accessing and modifying
+// the arguments object in strict mode with mismatched arguments count.
+(function () {
+  "use strict";
+  function test(outerCount, middleCount, innerCount) {
+    var forceDeopt = { deopt:false };
+    function inner(x,y) {
+      x = 0; y = 0;
+      forceDeopt.deopt;
+      assertSame(innerCount, arguments.length);
+      for (var i = 0; i < arguments.length; i++) {
+        assertSame(30 + i, arguments[i]);
+      }
+    }
+
+    function middle(x,y) {
+      x = 0; y = 0;
+      if (innerCount == 1) inner(30);
+      if (innerCount == 2) inner(30, 31);
+      if (innerCount == 3) inner(30, 31, 32);
+      assertSame(middleCount, arguments.length);
+      for (var i = 0; i < arguments.length; i++) {
+        assertSame(20 + i, arguments[i]);
+      }
+    }
+
+    function outer(x,y) {
+      x = 0; y = 0;
+      if (middleCount == 1) middle(20);
+      if (middleCount == 2) middle(20, 21);
+      if (middleCount == 3) middle(20, 21, 22);
+      assertSame(outerCount, arguments.length);
+      for (var i = 0; i < arguments.length; i++) {
+        assertSame(10 + i, arguments[i]);
+      }
+    }
+
+    for (var step = 0; step < 4; step++) {
+      if (outerCount == 1) outer(10);
+      if (outerCount == 2) outer(10, 11);
+      if (outerCount == 3) outer(10, 11, 12);
+      if (step == 1) %OptimizeFunctionOnNextCall(outer);
+      if (step == 2) delete forceDeopt.deopt;
+    }
+
+    %DeoptimizeFunction(outer);
+    %DeoptimizeFunction(middle);
+    %DeoptimizeFunction(inner);
+    %ClearFunctionTypeFeedback(outer);
+    %ClearFunctionTypeFeedback(middle);
+    %ClearFunctionTypeFeedback(inner);
+  }
+
+  for (var a = 1; a <= 3; a++) {
+    for (var b = 1; b <= 3; b++) {
+      for (var c = 1; c <= 3; c++) {
+        test(a,b,c);
+      }
+    }
+  }
+})();
diff --git a/deps/v8/test/mjsunit/compiler/multiply-add.js b/deps/v8/test/mjsunit/compiler/multiply-add.js
new file mode 100644
index 0000000000..2b4304e845
--- /dev/null
+++ b/deps/v8/test/mjsunit/compiler/multiply-add.js
@@ -0,0 +1,69 @@
+// Copyright 2012 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Flags: --allow-natives-syntax
+// Test expressions that can be computed with a multiply-add instruction.
+
+function f(a, b, c) {
+  return a * b + c;
+}
+
+function g(a, b, c) {
+  return a + b * c;
+}
+
+function h(a, b, c, d) {
+  return a * b + c * d;
+}
+
+assertEquals(5, f(1, 2, 3));
+assertEquals(5, f(1, 2, 3));
+%OptimizeFunctionOnNextCall(f);
+assertEquals(5, f(1, 2, 3));
+assertEquals("2foo", f(1, 2, "foo"));
+assertEquals(5.41, f(1.1, 2.1, 3.1));
+assertEquals(5.41, f(1.1, 2.1, 3.1));
+%OptimizeFunctionOnNextCall(f);
+assertEquals(5.41, f(1.1, 2.1, 3.1));
+
+assertEquals(7, g(1, 2, 3));
+assertEquals(7, g(1, 2, 3));
+%OptimizeFunctionOnNextCall(g);
+assertEquals(7, g(1, 2, 3));
+assertEquals(8.36, g(1.1, 2.2, 3.3));
+assertEquals(8.36, g(1.1, 2.2, 3.3));
+%OptimizeFunctionOnNextCall(g);
+assertEquals(8.36, g(1.1, 2.2, 3.3));
+
+assertEquals(14, h(1, 2, 3, 4));
+assertEquals(14, h(1, 2, 3, 4));
+%OptimizeFunctionOnNextCall(h);
+assertEquals(14, h(1, 2, 3, 4));
+assertEquals(15.02, h(1.1, 2.1, 3.1, 4.1));
+assertEquals(15.02, h(1.1, 2.1, 3.1, 4.1));
+%OptimizeFunctionOnNextCall(h);
+assertEquals(15.02, h(1.1, 2.1, 3.1, 4.1));
diff --git a/deps/v8/test/mjsunit/compiler/proto-chain-load.js b/deps/v8/test/mjsunit/compiler/proto-chain-load.js
new file mode 100644
index 0000000000..60c6431d2b
--- /dev/null
+++ b/deps/v8/test/mjsunit/compiler/proto-chain-load.js
@@ -0,0 +1,44 @@
+// Copyright 2012 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Flags: --allow-natives-syntax
+
+// Test HLoadNamedField on the proto chain.
+
+var obj4 = Object.create(null, { f4: {value: 4} });
+var obj3 = Object.create(obj4, { f3: {value: 3} });
+var obj2 = Object.create(obj3, { f2: {value: 2} });
+var obj1 = Object.create(obj2, { f1: {value: 1} });
+var obj0 = Object.create(obj1, { f0: {value: 0} });
+
+function get4(obj) { return obj.f4; }
+
+assertEquals(4, get4(obj0));
+assertEquals(4, get4(obj0));
+%OptimizeFunctionOnNextCall(get4);
+assertEquals(4, get4(obj0));
+assertEquals(4, get4(obj0));
diff --git a/deps/v8/test/mjsunit/compiler/regress-gvn.js b/deps/v8/test/mjsunit/compiler/regress-gvn.js
index 358daf7117..01b1aa9a60 100644
--- a/deps/v8/test/mjsunit/compiler/regress-gvn.js
+++ b/deps/v8/test/mjsunit/compiler/regress-gvn.js
@@ -25,7 +25,7 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-// Flags: --noalways-opt
+// Flags: --noalways-opt --allow-natives-syntax
 //
 // Regression test for global value numbering.
 
@@ -39,10 +39,11 @@ function test(a) {
 
 var a = new Array();
 
-var n = 100000000;
+var n = 100;
 
 var result = 0;
 for (var i = 0; i < n; ++i) {
+  if (i == 10) %OptimizeFunctionOnNextCall(test);
   a[0] = 0;
   result += test(a);
 }
diff --git a/deps/v8/test/mjsunit/compiler/regress-or.js b/deps/v8/test/mjsunit/compiler/regress-or.js
index 89f78025f1..939f2c3ffa 100644
--- a/deps/v8/test/mjsunit/compiler/regress-or.js
+++ b/deps/v8/test/mjsunit/compiler/regress-or.js
@@ -25,6 +25,8 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+// Flags: --allow-natives-syntax
+
 // Test deoptimization inside short-circuited expressions.
 function f1(x) {
   var c = "fail";
@@ -36,7 +38,8 @@ function f1(x) {
 
 function g1() { try { return 1; } finally {} }
 
-for (var i=0; i<10000000; i++) f1(42);
+for (var i = 0; i < 5; i++) f1(42);
+%OptimizeFunctionOnNextCall(f1);
 
 assertEquals(-1, f1(0));
 assertEquals(-43, f1(42));
@@ -52,6 +55,7 @@ function f2(x) {
 
 function g2() { try { return 0; } finally {} }
 
-for (var i=0; i<10000000; i++) f2(42);
+for (var i = 0; i < 5; i++) f2(42);
+%OptimizeFunctionOnNextCall(f2);
 
 assertEquals(-1, f2(""));
diff --git a/deps/v8/test/mjsunit/compiler/rotate.js b/deps/v8/test/mjsunit/compiler/rotate.js
new file mode 100644
index 0000000000..14fe9da3e6
--- /dev/null
+++ b/deps/v8/test/mjsunit/compiler/rotate.js
@@ -0,0 +1,224 @@
+// Copyright 2012 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Flags: --allow-natives-syntax --expose-gc
+
+// Test shift operations that can be replaced by rotate operation.
+
+function SideEffect() {
+  with ({}) { }  // not inlinable
+}
+
+function Twenty() {
+  SideEffect();
+  return 20;
+}
+
+function Twelve() {
+  SideEffect();
+  return 12;
+}
+
+
+function ROR(x, sa) {
+  return (x >>> sa) | (x << (32 - sa));
+}
+
+function ROR1(x, sa) {
+  return (x >>> sa) | (x << (32 - sa));
+}
+
+function ROR2(x, sa) {
+  return (x >>> (32 - sa)) | (x << (sa));
+}
+
+function ROR3(x, sa) {
+  return (x << (32 - sa)) | (x >>> sa);
+}
+
+function ROR4(x, sa) {
+  return (x << (sa)) | (x >>> (32 - sa));
+}
+
+assertEquals(1 << ((2 % 32)), ROR(1, 30));
+assertEquals(1 << ((2 % 32)), ROR(1, 30));
+%OptimizeFunctionOnNextCall(ROR);
+assertEquals(1 << ((2 % 32)), ROR(1, 30));
+
+assertEquals(0xF0000FFF | 0, ROR1(0x0000FFFF, 4));
+assertEquals(0xF0000FFF | 0, ROR1(0x0000FFFF, 4));
+%OptimizeFunctionOnNextCall(ROR1);
+assertEquals(0xF0000FFF | 0, ROR1(0x0000FFFF, 4));
+
+assertEquals(0x0FFFF000 | 0, ROR1(0x0000FFFF, 20));
+assertEquals(0x0FFFF000 | 0, ROR1(0x0000FFFF, 20));
+%OptimizeFunctionOnNextCall(ROR1);
+assertEquals(0x0FFFF000 | 0, ROR1(0x0000FFFF, 20));
+
+assertEquals(0x0FFFF000 | 0, ROR1(0x0000FFFF, Twenty()));
+assertEquals(0x0FFFF000 | 0, ROR1(0x0000FFFF, Twenty()));
+%OptimizeFunctionOnNextCall(ROR1);
+assertEquals(0x0FFFF000 | 0, ROR1(0x0000FFFF, Twenty()));
+
+for (var i = 0; i <= 100; i++) {
+  assertEquals(0xFFFFFFFF | 0, ROR1(0xFFFFFFFF, i));
+  assertEquals(0xFFFFFFFF | 0, ROR1(0xFFFFFFFF, i));
+  %OptimizeFunctionOnNextCall(ROR1);
+  assertEquals(0xFFFFFFFF | 0, ROR1(0xFFFFFFFF, i));
+}
+
+for (var i = 0; i <= 100; i++) {
+  assertEquals(-1, ROR1(-1, i));
+  assertEquals(-1, ROR1(-1, i));
+  %OptimizeFunctionOnNextCall(ROR1);
+  assertEquals(-1, ROR1(-1, i));
+}
+
+for (var i = 0; i <= 100; i++) {
+  assertEquals(1 << (32 - (i % 32)), ROR1(1, i));
+  assertEquals(1 << (32 - (i % 32)), ROR1(1, i));
+  %OptimizeFunctionOnNextCall(ROR1);
+  assertEquals(1 << (32 - (i % 32)), ROR1(1, i));
+}
+
+for (var i = 0; i <= 100; i++) {
+  assertEquals(1 << (32 - (i % 32)), ROR1(1.4, i));
+  assertEquals(1 << (32 - (i % 32)), ROR1(1.4, i));
+  %OptimizeFunctionOnNextCall(ROR1);
+  assertEquals(1 << (32 - (i % 32)), ROR1(1.4, i));
+}
+
+
+
+assertEquals(0xF0000FFF | 0, ROR2(0x0000FFFF, 28));
+assertEquals(0xF0000FFF | 0, ROR2(0x0000FFFF, 28));
+%OptimizeFunctionOnNextCall(ROR2);
+assertEquals(0xF0000FFF | 0, ROR2(0x0000FFFF, 28));
+
+assertEquals(0x0FFFF000 | 0, ROR2(0x0000FFFF, 12));
+assertEquals(0x0FFFF000 | 0, ROR2(0x0000FFFF, 12));
+%OptimizeFunctionOnNextCall(ROR2);
+assertEquals(0x0FFFF000 | 0, ROR2(0x0000FFFF, 12));
+
+assertEquals(0x0FFFF000 | 0, ROR2(0x0000FFFF, Twelve()));
+assertEquals(0x0FFFF000 | 0, ROR2(0x0000FFFF, Twelve()));
+%OptimizeFunctionOnNextCall(ROR2);
+assertEquals(0x0FFFF000 | 0, ROR2(0x0000FFFF, Twelve()));
+
+for (var i = 0; i <= 100; i++) {
+  assertEquals(0xFFFFFFFF | 0, ROR2(0xFFFFFFFF, i));
+  assertEquals(0xFFFFFFFF | 0, ROR2(0xFFFFFFFF, i));
+  %OptimizeFunctionOnNextCall(ROR2);
+  assertEquals(0xFFFFFFFF | 0, ROR2(0xFFFFFFFF, i));
+}
+
+for (var i = 0; i <= 100; i++) {
+  assertEquals(-1, ROR2(-1, i));
+  assertEquals(-1, ROR2(-1, i));
+  %OptimizeFunctionOnNextCall(ROR2);
+  assertEquals(-1, ROR2(-1, i));
+}
+
+for (var i = 0; i <= 100; i++) {
+  assertEquals(1 << ((i % 32)), ROR2(1, i));
+  assertEquals(1 << ((i % 32)), ROR2(1, i));
+  %OptimizeFunctionOnNextCall(ROR2);
+  assertEquals(1 << ((i % 32)), ROR2(1, i));
+}
+
+assertEquals(0xF0000FFF | 0, ROR3(0x0000FFFF, 4));
+assertEquals(0xF0000FFF | 0, ROR3(0x0000FFFF, 4));
+%OptimizeFunctionOnNextCall(ROR3);
+assertEquals(0xF0000FFF | 0, ROR3(0x0000FFFF, 4));
+
+assertEquals(0x0FFFF000 | 0, ROR3(0x0000FFFF, 20));
+assertEquals(0x0FFFF000 | 0, ROR3(0x0000FFFF, 20));
+%OptimizeFunctionOnNextCall(ROR3);
+assertEquals(0x0FFFF000 | 0, ROR3(0x0000FFFF, 20));
+
+assertEquals(0x0FFFF000 | 0, ROR3(0x0000FFFF, Twenty()));
+assertEquals(0x0FFFF000 | 0, ROR3(0x0000FFFF, Twenty()));
+%OptimizeFunctionOnNextCall(ROR3);
+assertEquals(0x0FFFF000 | 0, ROR3(0x0000FFFF, Twenty()));
+
+for (var i = 0; i <= 100; i++) {
+  assertEquals(0xFFFFFFFF | 0, ROR3(0xFFFFFFFF, i));
+  assertEquals(0xFFFFFFFF | 0, ROR3(0xFFFFFFFF, i));
+  %OptimizeFunctionOnNextCall(ROR3);
+  assertEquals(0xFFFFFFFF | 0, ROR3(0xFFFFFFFF, i));
+}
+
+for (var i = 0; i <= 100; i++) {
+  assertEquals(-1, ROR3(-1, i));
+  assertEquals(-1, ROR3(-1, i));
+  %OptimizeFunctionOnNextCall(ROR3);
+  assertEquals(-1, ROR3(-1, i));
+}
+
+for (var i = 0; i <= 100; i++) {
+  assertEquals(1 << (32 - (i % 32)), ROR3(1, i));
+  assertEquals(1 << (32 - (i % 32)), ROR3(1, i));
+  %OptimizeFunctionOnNextCall(ROR3);
+  assertEquals(1 << (32 - (i % 32)), ROR3(1, i));
+}
+
+assertEquals(0xF0000FFF | 0, ROR4(0x0000FFFF, 28));
+assertEquals(0xF0000FFF | 0, ROR4(0x0000FFFF, 28));
+%OptimizeFunctionOnNextCall(ROR4);
+assertEquals(0xF0000FFF | 0, ROR4(0x0000FFFF, 28));
+
+assertEquals(0x0FFFF000 | 0, ROR4(0x0000FFFF, 12));
+assertEquals(0x0FFFF000 | 0, ROR4(0x0000FFFF, 12));
+%OptimizeFunctionOnNextCall(ROR4);
+assertEquals(0x0FFFF000 | 0, ROR4(0x0000FFFF, 12));
+
+assertEquals(0x0FFFF000 | 0, ROR4(0x0000FFFF, Twelve()));
+assertEquals(0x0FFFF000 | 0, ROR4(0x0000FFFF, Twelve()));
+%OptimizeFunctionOnNextCall(ROR4);
+assertEquals(0x0FFFF000 | 0, ROR4(0x0000FFFF, Twelve()));
+
+for (var i = 0; i <= 100; i++) {
+  assertEquals(0xFFFFFFFF | 0, ROR4(0xFFFFFFFF, i));
+  assertEquals(0xFFFFFFFF | 0, ROR4(0xFFFFFFFF, i));
+  %OptimizeFunctionOnNextCall(ROR4);
+  assertEquals(0xFFFFFFFF | 0, ROR4(0xFFFFFFFF, i));
+}
+
+for (var i = 0; i <= 100; i++) {
+  assertEquals(-1, ROR4(-1, i));
+  assertEquals(-1, ROR4(-1, i));
+  %OptimizeFunctionOnNextCall(ROR4);
+  assertEquals(-1, ROR4(-1, i));
+}
+
+for (var i = 0; i <= 100; i++) {
+  assertEquals(1 << ((i % 32)), ROR4(1, i));
+  assertEquals(1 << ((i % 32)), ROR4(1, i));
+  %OptimizeFunctionOnNextCall(ROR4);
+  assertEquals(1 << ((i % 32)), ROR4(1, i));
+}
+
diff --git a/deps/v8/test/mjsunit/d8-os.js b/deps/v8/test/mjsunit/d8-os.js
index 239938cd16..f6b98396e5 100644
--- a/deps/v8/test/mjsunit/d8-os.js
+++ b/deps/v8/test/mjsunit/d8-os.js
@@ -129,13 +129,13 @@ if (this.os && os.system) {
       have_echo = false;
     }
     if (have_sleep) {
-      assertThrows("os.system('sleep', ['2000'], 200);", "sleep 1");
+      assertThrows("os.system('sleep', ['2000'], 20);", "sleep 1");
 
       // Check we time out with total time.
-      assertThrows("os.system('sleep', ['2000'], -1, 200);", "sleep 2");
+      assertThrows("os.system('sleep', ['2000'], -1, 20);", "sleep 2");
 
       // Check that -1 means no timeout.
-      os.system('sleep', ['1'], -1, -1);
+      os.system('sleep', ['0.1'], -1, -1);
 
     }
 
diff --git a/deps/v8/test/mjsunit/debug-liveedit-compile-error.js b/deps/v8/test/mjsunit/debug-liveedit-compile-error.js
new file mode 100644
index 0000000000..2fd6aedabf
--- /dev/null
+++ b/deps/v8/test/mjsunit/debug-liveedit-compile-error.js
@@ -0,0 +1,60 @@
+// Copyright 2012 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Flags: --expose-debug-as debug
+// Get the Debug object exposed from the debug context global object.
+
+Debug = debug.Debug
+
+eval("var something1 = 25; \n"
+     + " function ChooseAnimal() { return          'Cat';          } \n"
+     + " ChooseAnimal.Helper = function() { return 'Help!'; }\n");
+
+assertEquals("Cat", ChooseAnimal());
+
+var script = Debug.findScript(ChooseAnimal);
+
+var orig_animal = "Cat";
+var patch_pos = script.source.indexOf(orig_animal);
+var new_animal_patch = "Cap' + ) + 'bara";
+
+var change_log = new Array();
+var caught_exception = null;
+try {
+  Debug.LiveEdit.TestApi.ApplySingleChunkPatch(script, patch_pos,
+      orig_animal.length, new_animal_patch, change_log);
+} catch (e) {
+  caught_exception = e;
+}
+
+assertNotNull(caught_exception);
+assertEquals("Unexpected token )",
+    caught_exception.details.syntaxErrorMessage);
+
+assertEquals(2, caught_exception.details.position.start.line);
+
+
diff --git a/deps/v8/test/mjsunit/debug-liveedit-literals.js b/deps/v8/test/mjsunit/debug-liveedit-literals.js
new file mode 100644
index 0000000000..5f9217e833
--- /dev/null
+++ b/deps/v8/test/mjsunit/debug-liveedit-literals.js
@@ -0,0 +1,94 @@
+// Copyright 2010 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Flags: --expose-debug-as debug
+// Get the Debug object exposed from the debug context global object.
+
+Debug = debug.Debug
+
+function Test(old_expression, new_expression) {
+    // Generate several instances of function to test that we correctly fix
+    // all functions in memory.
+    var function_instance_number = 11;
+    eval("var t1 =1;\n" +
+         "ChooseAnimalArray = [];\n" +
+         "for (var i = 0; i < function_instance_number; i++) {\n" +
+         "    ChooseAnimalArray.push(\n" +
+         "        function ChooseAnimal() {\n" +
+         "            return " + old_expression + ";\n" +
+         "        });\n" +
+         "}\n" +
+         "var t2 =1;\n");
+
+    for (var i = 0; i < ChooseAnimalArray.length; i++) {
+        assertEquals("Cat", ChooseAnimalArray[i]());
+    }
+
+    var script = Debug.findScript(ChooseAnimalArray[0]);
+
+    var patch_pos = script.source.indexOf(old_expression);
+    var new_animal_patch = new_expression;
+
+    var change_log = new Array();
+    Debug.LiveEdit.TestApi.ApplySingleChunkPatch(script, patch_pos,
+        old_expression.length, new_expression, change_log);
+
+    for (var i = 0; i < ChooseAnimalArray.length; i++) {
+        assertEquals("Capybara", ChooseAnimalArray[i]());
+    }
+}
+
+// Check that old literal boilerplate was reset.
+Test("['Cat'][0]", "['Capybara'][0]");
+Test("['Cat'][0]", "{a:'Capybara'}.a");
+
+// No literals -> 1 literal.
+Test("'Cat'", "['Capybara'][0]");
+
+// No literals -> 2 literals.
+Test("'Cat'", "['Capy'][0] + {a:'bara'}.a");
+
+// 1 literal -> no literals.
+Test("['Cat'][0]", "'Capybara'");
+
+// 2 literals -> no literals.
+Test("['Ca'][0] + {a:'t'}.a", "'Capybara'");
+
+// No literals -> regexp.
+Test("'Cat'", "(/.A.Y.A.A/i).exec('Capybara')[0]");
+
+// Array literal -> regexp.
+Test("['Cat'][0]", "(/.A.Y.A.A/i).exec('Capybara')[0]");
+
+// Regexp -> object literal.
+Test("(/.A./i).exec('Cat')[0]", "{c:'Capybara'}.c");
+
+// No literals -> regexp.
+Test("'Cat'", "(/.A.Y.A.A/i).exec('Capybara')[0]");
+
+// Regexp -> no literals.
+Test("(/.A./i).exec('Cat')[0]", "'Capybara'");
diff --git a/deps/v8/test/mjsunit/debug-multiple-breakpoints.js b/deps/v8/test/mjsunit/debug-multiple-breakpoints.js
index 1047410112..d8b1d943f4 100644
--- a/deps/v8/test/mjsunit/debug-multiple-breakpoints.js
+++ b/deps/v8/test/mjsunit/debug-multiple-breakpoints.js
@@ -89,7 +89,7 @@ g();
 assertEquals(3, break_point_hit_count);
 
 // Finally test with many break points.
-test_count = 100;
+test_count = 10;
 bps = new Array(test_count);
 break_point_hit_count = 0;
 for (var i = 0; i < test_count; i++) {
diff --git a/deps/v8/test/mjsunit/debug-script.js b/deps/v8/test/mjsunit/debug-script.js
index d7ffb56958..b9dbc075e9 100644
--- a/deps/v8/test/mjsunit/debug-script.js
+++ b/deps/v8/test/mjsunit/debug-script.js
@@ -25,9 +25,11 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-// Flags: --expose-debug-as debug --expose-gc  --noparallel-recompilation
+// Flags: --expose-debug-as debug --expose-gc --noparallel-recompilation
+// Flags: --send-idle-notification
+
 // Get the Debug object exposed from the debug context global object.
-Debug = debug.Debug
+Debug = debug.Debug;
 
 Date();
 RegExp();
diff --git a/deps/v8/test/mjsunit/debug-set-variable-value.js b/deps/v8/test/mjsunit/debug-set-variable-value.js
new file mode 100644
index 0000000000..dac8861456
--- /dev/null
+++ b/deps/v8/test/mjsunit/debug-set-variable-value.js
@@ -0,0 +1,176 @@
+// Copyright 2012 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Flags: --expose-debug-as debug
+
+// Get the Debug object exposed from the debug context global object.
+var Debug = debug.Debug;
+
+// Accepts a function/closure 'fun' that must have a debugger statement inside.
+// A variable 'variable_name' must be initialized before debugger statement
+// and returned after the statement. The test will alter variable value when
+// on debugger statement and check that returned value reflects the change.
+function RunPauseTest(scope_number, variable_name, expected_new_value, fun) {
+  var old_value = fun();
+
+  var listener_delegate;
+  var listener_called = false;
+  var exception = null;
+
+  function listener_delegate(exec_state) {
+    var scope = exec_state.frame(0).scope(scope_number);
+    scope.setVariableValue(variable_name, expected_new_value);
+  }
+
+  function listener(event, exec_state, event_data, data) {
+    try {
+      if (event == Debug.DebugEvent.Break) {
+        listener_called = true;
+        listener_delegate(exec_state);
+      }
+    } catch (e) {
+      exception = e;
+    }
+  }
+
+  // Add the debug event listener.
+  Debug.setListener(listener);
+
+  var actual_new_value;
+  try {
+    actual_new_value = fun();
+  } finally {
+    Debug.setListener(null);
+  }
+
+  if (exception != null) {
+   assertUnreachable("Exception: " + exception);
+  }
+  assertTrue(listener_called);
+
+  assertTrue(old_value != actual_new_value);
+  assertTrue(expected_new_value == actual_new_value);
+}
+
+// Accepts a closure 'fun' that returns a variable from it's outer scope.
+// The test changes the value of variable via the handle to function and checks
+// that the return value changed accordingly.
+function RunClosureTest(scope_number, variable_name, expected_new_value, fun) {
+  var old_value = fun();
+
+  var fun_mirror = Debug.MakeMirror(fun);
+
+  var scope = fun_mirror.scope(scope_number);
+  scope.setVariableValue(variable_name, expected_new_value);
+
+  var actual_new_value = fun();
+
+  assertTrue(old_value != actual_new_value);
+  assertTrue(expected_new_value == actual_new_value);
+}
+
+// Test changing variable value when in pause
+RunPauseTest(1, 'v1', 5, (function Factory() {
+  var v1 = 'cat';
+  return function() {
+    debugger;
+    return v1;
+  }
+})());
+
+RunPauseTest(1, 'v2', 11, (function Factory(v2) {
+  return function() {
+    debugger;
+    return v2;
+  }
+})('dog'));
+
+RunPauseTest(3, 'foo', 77, (function Factory() {
+  var foo = "capybara";
+  return (function() {
+    var bar = "fish";
+    try {
+      throw {name: "test exception"};
+    } catch (e) {
+      return function() {
+        debugger;
+        bar = "beast";
+        return foo;
+      }
+    }
+  })();
+})());
+
+
+
+// Test changing variable value in closure by handle
+RunClosureTest(0, 'v1', 5, (function Factory() {
+  var v1 = 'cat';
+  return function() {
+    return v1;
+  }
+})());
+
+RunClosureTest(0, 'v2', 11, (function Factory(v2) {
+  return function() {
+    return v2;
+  }
+})('dog'));
+
+RunClosureTest(2, 'foo', 77, (function Factory() {
+  var foo = "capybara";
+  return (function() {
+    var bar = "fish";
+    try {
+      throw {name: "test exception"};
+    } catch (e) {
+      return function() {
+        bar = "beast";
+        return foo;
+      }
+    }
+  })();
+})());
+
+
+// Test value description protocol JSON
+assertEquals(true, Debug.TestApi.CommandProcessorResolveValue({value: true}));
+
+assertSame(null, Debug.TestApi.CommandProcessorResolveValue({type: "null"}));
+assertSame(undefined,
+    Debug.TestApi.CommandProcessorResolveValue({type: "undefined"}));
+
+assertSame("123", Debug.TestApi.CommandProcessorResolveValue(
+    {type: "string", stringDescription: "123"}));
+assertSame(123, Debug.TestApi.CommandProcessorResolveValue(
+    {type: "number", stringDescription: "123"}));
+
+assertSame(Number, Debug.TestApi.CommandProcessorResolveValue(
+    {handle: Debug.MakeMirror(Number).handle()}));
+assertSame(RunClosureTest, Debug.TestApi.CommandProcessorResolveValue(
+    {handle: Debug.MakeMirror(RunClosureTest).handle()}));
+
diff --git a/deps/v8/test/mjsunit/debug-stepout-scope-part1.js b/deps/v8/test/mjsunit/debug-stepout-scope-part1.js
new file mode 100644
index 0000000000..f2f9d91419
--- /dev/null
+++ b/deps/v8/test/mjsunit/debug-stepout-scope-part1.js
@@ -0,0 +1,190 @@
+// Copyright 2011 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Flags: --expose-debug-as debug --expose-natives-as=builtins
+
+// Check that the ScopeIterator can properly recreate the scope at
+// every point when stepping through functions.
+
+var Debug = debug.Debug;
+
+function listener(event, exec_state, event_data, data) {
+  if (event == Debug.DebugEvent.Break) {
+    // Access scope details.
+    var scope_count = exec_state.frame().scopeCount();
+    for (var i = 0; i < scope_count; i++) {
+      var scope = exec_state.frame().scope(i);
+      // assertTrue(scope.isScope());
+      scope.scopeType();
+      scope.scopeObject();
+    }
+
+    // Do steps until we reach the global scope again.
+    if (true) {
+      exec_state.prepareStep(Debug.StepAction.StepInMin, 1);
+    }
+  }
+}
+
+Debug.setListener(listener);
+
+
+function test1() {
+  debugger;
+  with ({x:1}) {
+    x = 2;
+  }
+}
+test1();
+
+
+function test2() {
+  if (true) {
+    with ({}) {
+      debugger;
+    }
+  } else {
+    with ({}) {
+      return 10;
+    }
+  }
+}
+test2();
+
+
+function test3() {
+  if (true) {
+    debugger;
+  } else {
+    with ({}) {
+      return 10;
+    }
+  }
+}
+test3();
+
+
+function test4() {
+  debugger;
+  with ({x:1}) x = 1
+}
+test4();
+
+
+function test5() {
+  debugger;
+  var dummy = 1;
+  with ({}) {
+    with ({}) {
+      dummy = 2;
+    }
+  }
+  dummy = 3;
+}
+test5();
+
+
+function test6() {
+  debugger;
+  try {
+    throw 'stuff';
+  } catch (e) {
+    e = 1;
+  }
+}
+test6();
+
+
+function test7() {
+  debugger;
+  function foo() {}
+}
+test7();
+
+
+function test8() {
+  debugger;
+  (function foo() {})();
+}
+test8();
+
+
+function test10() {
+  debugger;
+  with ({}) {
+    return 10;
+  }
+}
+test10();
+
+
+function test11() {
+  debugger;
+  try {
+    throw 'stuff';
+  } catch (e) {
+    return 10;
+  }
+}
+test11();
+
+
+var prefixes = [
+    "debugger; ",
+    "if (false) { try { throw 0; } catch(x) { return x; } }; debugger; " ];
+
+
+// Return from function constructed with Function constructor.
+var anon = 12;
+for (var i = 0; i < prefixes.length; ++i) {
+  var pre = prefixes[i];
+  Function(pre + "return 42")();
+  Function(pre + "return 42 ")();
+  Function(pre + "return 42;")();
+  Function(pre + "return 42; ")();
+  Function(pre + "return anon")();
+  Function(pre + "return anon ")();
+  Function(pre + "return anon;")();
+  Function(pre + "return anon; ")();
+}
+
+
+try {
+  with({}) {
+    debugger;
+    eval("{}$%:^");
+  }
+} catch(e) {
+  nop();
+}
+
+
+function nop() {}
+
+
+// With block as the last(!) statement in global code.
+with ({}) { debugger; }
\ No newline at end of file
diff --git a/deps/v8/test/mjsunit/debug-stepout-scope-part2.js b/deps/v8/test/mjsunit/debug-stepout-scope-part2.js
new file mode 100644
index 0000000000..121c7b74df
--- /dev/null
+++ b/deps/v8/test/mjsunit/debug-stepout-scope-part2.js
@@ -0,0 +1,83 @@
+// Copyright 2011 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Flags: --expose-debug-as debug --expose-natives-as=builtins
+
+// Check that the ScopeIterator can properly recreate the scope at
+// every point when stepping through functions.
+
+var Debug = debug.Debug;
+
+function listener(event, exec_state, event_data, data) {
+  if (event == Debug.DebugEvent.Break) {
+    // Access scope details.
+    var scope_count = exec_state.frame().scopeCount();
+    for (var i = 0; i < scope_count; i++) {
+      var scope = exec_state.frame().scope(i);
+      // assertTrue(scope.isScope());
+      scope.scopeType();
+      scope.scopeObject();
+    }
+
+    // Do steps until we reach the global scope again.
+    if (true) {
+      exec_state.prepareStep(Debug.StepAction.StepInMin, 1);
+    }
+  }
+}
+
+Debug.setListener(listener);
+
+var q = 42;
+var prefixes = [ "debugger; ",
+                 "if (false) { try { throw 0; } catch(x) { return x; } }; debugger; " ];
+var bodies = [ "1",
+               "1 ",
+               "1;",
+               "1; ",
+               "q",
+               "q ",
+               "q;",
+               "q; ",
+               "try { throw 'stuff' } catch (e) { e = 1; }",
+               "try { throw 'stuff' } catch (e) { e = 1; } ",
+               "try { throw 'stuff' } catch (e) { e = 1; };",
+               "try { throw 'stuff' } catch (e) { e = 1; }; " ];
+
+
+function test9() {
+  debugger;
+  for (var i = 0; i < prefixes.length; ++i) {
+    var pre = prefixes[i];
+    for (var j = 0; j < bodies.length; ++j) {
+      var body = bodies[j];
+      eval(pre + body);
+      eval("'use strict'; " + pre + body);
+    }
+  }
+}
+test9();
diff --git a/deps/v8/test/mjsunit/debug-stepout-scope-part3.js b/deps/v8/test/mjsunit/debug-stepout-scope-part3.js
new file mode 100644
index 0000000000..16b085e541
--- /dev/null
+++ b/deps/v8/test/mjsunit/debug-stepout-scope-part3.js
@@ -0,0 +1,80 @@
+// Copyright 2011 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Flags: --expose-debug-as debug --expose-natives-as=builtins
+
+// Check that the ScopeIterator can properly recreate the scope at
+// every point when stepping through functions.
+
+var Debug = debug.Debug;
+
+function listener(event, exec_state, event_data, data) {
+  if (event == Debug.DebugEvent.Break) {
+    // Access scope details.
+    var scope_count = exec_state.frame().scopeCount();
+    for (var i = 0; i < scope_count; i++) {
+      var scope = exec_state.frame().scope(i);
+      // assertTrue(scope.isScope());
+      scope.scopeType();
+      scope.scopeObject();
+    }
+
+    // Do steps until we reach the global scope again.
+    if (true) {
+      exec_state.prepareStep(Debug.StepAction.StepInMin, 1);
+    }
+  }
+}
+
+Debug.setListener(listener);
+
+var q = 42;
+var prefixes = [
+    "debugger; ",
+    "if (false) { try { throw 0; } catch(x) { return x; } }; debugger; " ];
+var with_bodies = [ "with ({}) {}",
+                    "with ({x:1}) x",
+                    "with ({x:1}) x = 1",
+                    "with ({x:1}) x ",
+                    "with ({x:1}) x = 1 ",
+                    "with ({x:1}) x;",
+                    "with ({x:1}) x = 1;",
+                    "with ({x:1}) x; ",
+                    "with ({x:1}) x = 1; " ];
+
+
+function test9() {
+  debugger;
+  for (var i = 0; i < prefixes.length; ++i) {
+    var pre = prefixes[i];
+    for (var j = 0; j < with_bodies.length; ++j) {
+      var body = with_bodies[j];
+      eval(pre + body);
+    }
+  }
+}
+test9();
diff --git a/deps/v8/test/mjsunit/debug-stepout-scope-part4.js b/deps/v8/test/mjsunit/debug-stepout-scope-part4.js
new file mode 100644
index 0000000000..48f43477d7
--- /dev/null
+++ b/deps/v8/test/mjsunit/debug-stepout-scope-part4.js
@@ -0,0 +1,80 @@
+// Copyright 2011 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Flags: --expose-debug-as debug --expose-natives-as=builtins
+
+// Check that the ScopeIterator can properly recreate the scope at
+// every point when stepping through functions.
+
+var Debug = debug.Debug;
+
+function listener(event, exec_state, event_data, data) {
+  if (event == Debug.DebugEvent.Break) {
+    // Access scope details.
+    var scope_count = exec_state.frame().scopeCount();
+    for (var i = 0; i < scope_count; i++) {
+      var scope = exec_state.frame().scope(i);
+      // assertTrue(scope.isScope());
+      scope.scopeType();
+      scope.scopeObject();
+    }
+
+    // Do steps until we reach the global scope again.
+    if (true) {
+      exec_state.prepareStep(Debug.StepAction.StepInMin, 1);
+    }
+  }
+}
+
+Debug.setListener(listener);
+
+var q = 42;
+var prefixes = [
+  "debugger; ",
+  "if (false) { try { throw 0; } catch(x) { return x; } }; debugger; " ];
+var bodies = [ "1",
+               "1 ",
+               "1;",
+               "1; ",
+               "q",
+               "q ",
+               "q;",
+               "q; ",
+               "try { throw 'stuff' } catch (e) { e = 1; }",
+               "try { throw 'stuff' } catch (e) { e = 1; } ",
+               "try { throw 'stuff' } catch (e) { e = 1; };",
+               "try { throw 'stuff' } catch (e) { e = 1; }; " ];
+
+
+// Test global eval and function constructor.
+for (var i = 0; i < prefixes.length; ++i) {
+  var pre = prefixes[i];
+  for (var j = 0; j < bodies.length; ++j) {
+    var body = bodies[j];
+    eval(pre + body);
+  }
+}
diff --git a/deps/v8/test/mjsunit/debug-stepout-scope-part5.js b/deps/v8/test/mjsunit/debug-stepout-scope-part5.js
new file mode 100644
index 0000000000..f060ec3889
--- /dev/null
+++ b/deps/v8/test/mjsunit/debug-stepout-scope-part5.js
@@ -0,0 +1,77 @@
+// Copyright 2011 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Flags: --expose-debug-as debug --expose-natives-as=builtins
+
+// Check that the ScopeIterator can properly recreate the scope at
+// every point when stepping through functions.
+
+var Debug = debug.Debug;
+
+function listener(event, exec_state, event_data, data) {
+  if (event == Debug.DebugEvent.Break) {
+    // Access scope details.
+    var scope_count = exec_state.frame().scopeCount();
+    for (var i = 0; i < scope_count; i++) {
+      var scope = exec_state.frame().scope(i);
+      // assertTrue(scope.isScope());
+      scope.scopeType();
+      scope.scopeObject();
+    }
+
+    // Do steps until we reach the global scope again.
+    if (true) {
+      exec_state.prepareStep(Debug.StepAction.StepInMin, 1);
+    }
+  }
+}
+
+Debug.setListener(listener);
+
+var q = 42;
+var prefixes = [ "debugger; ",
+                 "if (false) { try { throw 0; } catch(x) { return x; } }; debugger; " ];
+var with_bodies = [ "with ({}) {}",
+                    "with ({x:1}) x",
+                    "with ({x:1}) x = 1",
+                    "with ({x:1}) x ",
+                    "with ({x:1}) x = 1 ",
+                    "with ({x:1}) x;",
+                    "with ({x:1}) x = 1;",
+                    "with ({x:1}) x; ",
+                    "with ({x:1}) x = 1; " ];
+
+
+// Test global eval and function constructor.
+for (var i = 0; i < prefixes.length; ++i) {
+  var pre = prefixes[i];
+  for (var j = 0; j < with_bodies.length; ++j) {
+    var body = with_bodies[j];
+    eval(pre + body);
+    Function(pre + body)();
+  }
+}
diff --git a/deps/v8/test/mjsunit/debug-stepout-scope-part6.js b/deps/v8/test/mjsunit/debug-stepout-scope-part6.js
new file mode 100644
index 0000000000..f7c8df0bc8
--- /dev/null
+++ b/deps/v8/test/mjsunit/debug-stepout-scope-part6.js
@@ -0,0 +1,79 @@
+// Copyright 2011 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Flags: --expose-debug-as debug --expose-natives-as=builtins
+
+// Check that the ScopeIterator can properly recreate the scope at
+// every point when stepping through functions.
+
+var Debug = debug.Debug;
+
+function listener(event, exec_state, event_data, data) {
+  if (event == Debug.DebugEvent.Break) {
+    // Access scope details.
+    var scope_count = exec_state.frame().scopeCount();
+    for (var i = 0; i < scope_count; i++) {
+      var scope = exec_state.frame().scope(i);
+      // assertTrue(scope.isScope());
+      scope.scopeType();
+      scope.scopeObject();
+    }
+
+    // Do steps until we reach the global scope again.
+    if (true) {
+      exec_state.prepareStep(Debug.StepAction.StepInMin, 1);
+    }
+  }
+}
+
+Debug.setListener(listener);
+
+var q = 42;
+var prefixes = [ "debugger; ",
+                 "if (false) { try { throw 0; } catch(x) { return x; } }; debugger; " ];
+var bodies = [ "1",
+               "1 ",
+               "1;",
+               "1; ",
+               "q",
+               "q ",
+               "q;",
+               "q; ",
+               "try { throw 'stuff' } catch (e) { e = 1; }",
+               "try { throw 'stuff' } catch (e) { e = 1; } ",
+               "try { throw 'stuff' } catch (e) { e = 1; };",
+               "try { throw 'stuff' } catch (e) { e = 1; }; " ];
+
+
+// Test global eval and function constructor.
+for (var i = 0; i < prefixes.length; ++i) {
+  var pre = prefixes[i];
+  for (var j = 0; j < bodies.length; ++j) {
+    var body = bodies[j];
+    eval("'use strict'; " + pre + body);
+  }
+}
diff --git a/deps/v8/test/mjsunit/debug-stepout-scope-part7.js b/deps/v8/test/mjsunit/debug-stepout-scope-part7.js
new file mode 100644
index 0000000000..4f0c066843
--- /dev/null
+++ b/deps/v8/test/mjsunit/debug-stepout-scope-part7.js
@@ -0,0 +1,79 @@
+// Copyright 2011 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Flags: --expose-debug-as debug --expose-natives-as=builtins
+
+// Check that the ScopeIterator can properly recreate the scope at
+// every point when stepping through functions.
+
+var Debug = debug.Debug;
+
+function listener(event, exec_state, event_data, data) {
+  if (event == Debug.DebugEvent.Break) {
+    // Access scope details.
+    var scope_count = exec_state.frame().scopeCount();
+    for (var i = 0; i < scope_count; i++) {
+      var scope = exec_state.frame().scope(i);
+      // assertTrue(scope.isScope());
+      scope.scopeType();
+      scope.scopeObject();
+    }
+
+    // Do steps until we reach the global scope again.
+    if (true) {
+      exec_state.prepareStep(Debug.StepAction.StepInMin, 1);
+    }
+  }
+}
+
+Debug.setListener(listener);
+
+var q = 42;
+var prefixes = [ "debugger; ",
+                 "if (false) { try { throw 0; } catch(x) { return x; } }; debugger; " ];
+var bodies = [ "1",
+               "1 ",
+               "1;",
+               "1; ",
+               "q",
+               "q ",
+               "q;",
+               "q; ",
+               "try { throw 'stuff' } catch (e) { e = 1; }",
+               "try { throw 'stuff' } catch (e) { e = 1; } ",
+               "try { throw 'stuff' } catch (e) { e = 1; };",
+               "try { throw 'stuff' } catch (e) { e = 1; }; " ];
+
+
+// Test global eval and function constructor.
+for (var i = 0; i < prefixes.length; ++i) {
+  var pre = prefixes[i];
+  for (var j = 0; j < bodies.length; ++j) {
+    var body = bodies[j];
+    Function(pre + body)();
+  }
+}
diff --git a/deps/v8/test/mjsunit/debug-stepout-scope.js b/deps/v8/test/mjsunit/debug-stepout-scope-part8.js
index 9c040da932..f91fab5e4d 100644
--- a/deps/v8/test/mjsunit/debug-stepout-scope.js
+++ b/deps/v8/test/mjsunit/debug-stepout-scope-part8.js
@@ -53,191 +53,6 @@ function listener(event, exec_state, event_data, data) {
 Debug.setListener(listener);
 
 
-function test1() {
-  debugger;
-  with ({x:1}) {
-    x = 2;
-  }
-}
-test1();
-
-
-function test2() {
-  if (true) {
-    with ({}) {
-      debugger;
-    }
-  } else {
-    with ({}) {
-      return 10;
-    }
-  }
-}
-test2();
-
-
-function test3() {
-  if (true) {
-    debugger;
-  } else {
-    with ({}) {
-      return 10;
-    }
-  }
-}
-test3();
-
-
-function test4() {
-  debugger;
-  with ({x:1}) x = 1
-}
-test4();
-
-
-function test5() {
-  debugger;
-  var dummy = 1;
-  with ({}) {
-    with ({}) {
-      dummy = 2;
-    }
-  }
-  dummy = 3;
-}
-test5();
-
-
-function test6() {
-  debugger;
-  try {
-    throw 'stuff';
-  } catch (e) {
-    e = 1;
-  }
-}
-test6();
-
-
-function test7() {
-  debugger;
-  function foo() {}
-}
-test7();
-
-
-function test8() {
-  debugger;
-  (function foo() {})();
-}
-test8();
-
-
-var q = 42;
-var prefixes = [ "debugger; ",
-                 "if (false) { try { throw 0; } catch(x) { return x; } }; debugger; " ];
-var bodies = [ "1",
-               "1 ",
-               "1;",
-               "1; ",
-               "q",
-               "q ",
-               "q;",
-               "q; ",
-               "try { throw 'stuff' } catch (e) { e = 1; }",
-               "try { throw 'stuff' } catch (e) { e = 1; } ",
-               "try { throw 'stuff' } catch (e) { e = 1; };",
-               "try { throw 'stuff' } catch (e) { e = 1; }; " ];
-var with_bodies = [ "with ({}) {}",
-                    "with ({x:1}) x",
-                    "with ({x:1}) x = 1",
-                    "with ({x:1}) x ",
-                    "with ({x:1}) x = 1 ",
-                    "with ({x:1}) x;",
-                    "with ({x:1}) x = 1;",
-                    "with ({x:1}) x; ",
-                    "with ({x:1}) x = 1; " ];
-
-
-function test9() {
-  debugger;
-  for (var i = 0; i < prefixes.length; ++i) {
-    var pre = prefixes[i];
-    for (var j = 0; j < bodies.length; ++j) {
-      var body = bodies[j];
-      eval(pre + body);
-      eval("'use strict'; " + pre + body);
-    }
-    for (var j = 0; j < with_bodies.length; ++j) {
-      var body = with_bodies[j];
-      eval(pre + body);
-    }
-  }
-}
-test9();
-
-
-function test10() {
-  debugger;
-  with ({}) {
-    return 10;
-  }
-}
-test10();
-
-
-function test11() {
-  debugger;
-  try {
-    throw 'stuff';
-  } catch (e) {
-    return 10;
-  }
-}
-test11();
-
-
-// Test global eval and function constructor.
-for (var i = 0; i < prefixes.length; ++i) {
-  var pre = prefixes[i];
-  for (var j = 0; j < bodies.length; ++j) {
-    var body = bodies[j];
-    eval(pre + body);
-    eval("'use strict'; " + pre + body);
-    Function(pre + body)();
-  }
-  for (var j = 0; j < with_bodies.length; ++j) {
-    var body = with_bodies[j];
-    eval(pre + body);
-    Function(pre + body)();
-  }
-}
-
-
-try {
-  with({}) {
-    debugger;
-    eval("{}$%:^");
-  }
-} catch(e) {
-  nop();
-}
-
-// Return from function constructed with Function constructor.
-var anon = 12;
-for (var i = 0; i < prefixes.length; ++i) {
-  var pre = prefixes[i];
-  Function(pre + "return 42")();
-  Function(pre + "return 42 ")();
-  Function(pre + "return 42;")();
-  Function(pre + "return 42; ")();
-  Function(pre + "return anon")();
-  Function(pre + "return anon ")();
-  Function(pre + "return anon;")();
-  Function(pre + "return anon; ")();
-}
-
-
 function nop() {}
 
 
@@ -417,7 +232,3 @@ function stress() {
 
 }
 stress();
-
-
-// With block as the last(!) statement in global code.
-with ({}) { debugger; }
\ No newline at end of file
diff --git a/deps/v8/test/mjsunit/delete-non-configurable.js b/deps/v8/test/mjsunit/delete-non-configurable.js
new file mode 100644
index 0000000000..8991f43f53
--- /dev/null
+++ b/deps/v8/test/mjsunit/delete-non-configurable.js
@@ -0,0 +1,74 @@
+// Copyright 2012 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Delete elements of a String object.
+var TIPLI = "tipli"
+var so = new String(TIPLI);
+var length = so.length;
+
+for (var i = 0; i < length; i++) {
+  assertFalse(delete so[i]);
+  assertThrows("'use strict'; delete so[i];", TypeError);
+  assertFalse(delete so[i.toString()]);
+  assertThrows("'use strict'; delete so[i.toString()];", TypeError);
+}
+
+assertEquals(length, so.length);
+assertEquals(new String(TIPLI), so);
+
+// Delete elements of an Array.
+var arr = new Array(length);
+
+for (var i = 0; i < length; i++) {
+  arr[i] = i;
+  Object.defineProperty(arr, i, { configurable: false });
+}
+
+for (var i = 0; i < length; i++) {
+  assertFalse(delete arr[i]);
+  assertThrows("'use strict'; delete arr[i];", TypeError);
+  assertFalse(delete arr[i.toString()]);
+  assertThrows("'use strict'; delete arr[i.toString()];", TypeError);
+  assertEquals(i, arr[i]);
+}
+
+assertEquals(length, arr.length);
+assertTrue(delete arr[length]);
+
+// Delete an element of an Object.
+var INDEX = 28;
+var obj = new Object();
+
+obj[INDEX] = TIPLI;
+Object.defineProperty(obj, INDEX, { configurable: false });
+
+assertFalse(delete obj[INDEX]);
+assertThrows("'use strict'; delete obj[INDEX];", TypeError);
+assertFalse(delete obj[INDEX.toString()]);
+assertThrows("'use strict'; delete obj[INDEX.toString()];", TypeError);
+assertEquals(TIPLI, obj[INDEX]);
+assertTrue(delete arr[INDEX+1]);
diff --git a/deps/v8/test/mjsunit/deopt-minus-zero.js b/deps/v8/test/mjsunit/deopt-minus-zero.js
new file mode 100644
index 0000000000..ee0983127d
--- /dev/null
+++ b/deps/v8/test/mjsunit/deopt-minus-zero.js
@@ -0,0 +1,56 @@
+// Copyright 2012 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Flags: --allow-natives-syntax --expose-gc
+
+/**
+ * The possible optimization states of a function. Must be in sync with the
+ * return values of Runtime_GetOptimizationStatus() in runtime.cc!
+ */
+var OptimizationState = {
+    YES: 1,
+    NO: 2,
+    ALWAYS: 3,
+    NEVER: 4
+};
+
+function mul (a, b) {
+  return a * b;
+}
+
+mul(-1, -1);
+mul(0x80000001|0, -1);
+mul(0x80000001|0, -1);
+%OptimizeFunctionOnNextCall(mul);
+mul(0, -1);
+%OptimizeFunctionOnNextCall(mul);
+mul(0, -1);
+
+var raw_optimized = %GetOptimizationStatus(mul);
+assertFalse(raw_optimized == OptimizationState.NO);
+gc();
+
diff --git a/deps/v8/test/mjsunit/elements-kind.js b/deps/v8/test/mjsunit/elements-kind.js
index b74a212437..cf9c21605d 100644
--- a/deps/v8/test/mjsunit/elements-kind.js
+++ b/deps/v8/test/mjsunit/elements-kind.js
@@ -321,8 +321,7 @@ if (support_smi_only_arrays) {
   assertKind(elements_kind.fast_double, b);
   var c = a.concat(b);
   assertEquals([1, 2, 4.5, 5.5], c);
-  // TODO(1810): Change implementation so that we get DOUBLE elements here?
-  assertKind(elements_kind.fast, c);
+  assertKind(elements_kind.fast_double, c);
 }
 
 // Test that Array.push() correctly handles SMI elements.
diff --git a/deps/v8/test/mjsunit/elements-length-no-holey.js b/deps/v8/test/mjsunit/elements-length-no-holey.js
new file mode 100644
index 0000000000..5bac296e1a
--- /dev/null
+++ b/deps/v8/test/mjsunit/elements-length-no-holey.js
@@ -0,0 +1,33 @@
+// Copyright 2012 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Flags: --allow-natives-syntax
+
+a = [1,2,3];
+a.length = 1;
+assertFalse(%HasFastHoleyElements(a));
+assertTrue(%HasFastSmiElements(a));
diff --git a/deps/v8/test/mjsunit/elements-transition-hoisting.js b/deps/v8/test/mjsunit/elements-transition-hoisting.js
index 5fb3889c6e..017e7ec51f 100644
--- a/deps/v8/test/mjsunit/elements-transition-hoisting.js
+++ b/deps/v8/test/mjsunit/elements-transition-hoisting.js
@@ -25,8 +25,7 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-// Flags: --allow-natives-syntax --smi-only-arrays --expose-gc
-// Flags: --noparallel-recompilation
+// Flags: --allow-natives-syntax --smi-only-arrays --noparallel-recompilation
 
 // Ensure that ElementsKind transitions in various situations are hoisted (or
 // not hoisted) correctly, don't change the semantics programs and don't trigger
@@ -40,11 +39,6 @@ if (support_smi_only_arrays) {
   print("Tests do NOT include smi-only arrays.");
 }
 
-// Force existing ICs from previous stress runs to be flushed, otherwise the
-// assumptions in this test about when deoptimizations get triggered are not
-// valid.
-gc();
-
 if (support_smi_only_arrays) {
   // Make sure that a simple elements array transitions inside a loop before
   // stores to an array gets hoisted in a way that doesn't generate a deopt in
@@ -66,6 +60,7 @@ if (support_smi_only_arrays) {
   testDoubleConversion4(new Array(5));
   testDoubleConversion4(new Array(5));
   assertTrue(2 != %GetOptimizationStatus(testDoubleConversion4));
+  %ClearFunctionTypeFeedback(testDoubleConversion4);
 
   // Make sure that non-element related map checks that are not preceded by
   // transitions in a loop still get hoisted in a way that doesn't generate a
@@ -91,6 +86,7 @@ if (support_smi_only_arrays) {
   testExactMapHoisting(new Array(5));
   testExactMapHoisting(new Array(5));
   assertTrue(2 != %GetOptimizationStatus(testExactMapHoisting));
+  %ClearFunctionTypeFeedback(testExactMapHoisting);
 
   // Make sure that non-element related map checks do NOT get hoisted if they
   // depend on an elements transition before them and it's not possible to hoist
@@ -122,6 +118,7 @@ if (support_smi_only_arrays) {
   testExactMapHoisting2(new Array(5));
   // Temporarily disabled - see bug 2176.
   // assertTrue(2 != %GetOptimizationStatus(testExactMapHoisting2));
+  %ClearFunctionTypeFeedback(testExactMapHoisting2);
 
   // Make sure that non-element related map checks do get hoisted if they use
   // the transitioned map for the check and all transitions that they depend
@@ -150,6 +147,7 @@ if (support_smi_only_arrays) {
   testExactMapHoisting3(new Array(5));
   testExactMapHoisting3(new Array(5));
   assertTrue(2 != %GetOptimizationStatus(testExactMapHoisting3));
+  %ClearFunctionTypeFeedback(testExactMapHoisting3);
 
   function testDominatingTransitionHoisting1(a) {
     var object = new Object();
@@ -163,6 +161,7 @@ if (support_smi_only_arrays) {
     } while (--count > 3);
   }
 
+  /*
   testDominatingTransitionHoisting1(new Array(5));
   testDominatingTransitionHoisting1(new Array(5));  // Call twice to make sure
                                                     // that second store is a
@@ -171,7 +170,12 @@ if (support_smi_only_arrays) {
   %OptimizeFunctionOnNextCall(testDominatingTransitionHoisting1);
   testDominatingTransitionHoisting1(new Array(5));
   testDominatingTransitionHoisting1(new Array(5));
+  // TODO(verwaest) With current changes the elements transition gets hoisted
+  // above the access, causing a deopt. We should update the type of access
+  // rather than forbid hoisting the transition.
   assertTrue(2 != %GetOptimizationStatus(testDominatingTransitionHoisting1));
+  %ClearFunctionTypeFeedback(testDominatingTransitionHoisting1);
+  */
 
   function testHoistingWithSideEffect(a) {
     var object = new Object();
@@ -191,6 +195,7 @@ if (support_smi_only_arrays) {
   testHoistingWithSideEffect(new Array(5));
   testHoistingWithSideEffect(new Array(5));
   assertTrue(2 != %GetOptimizationStatus(testHoistingWithSideEffect));
+  %ClearFunctionTypeFeedback(testHoistingWithSideEffect);
 
   function testStraightLineDupeElinination(a,b,c,d,e,f) {
     var count = 3;
@@ -226,7 +231,8 @@ if (support_smi_only_arrays) {
   testStraightLineDupeElinination(new Array(5),0,0,0,.5,0);
   testStraightLineDupeElinination(new Array(5),0,0,0,0,.5);
   %OptimizeFunctionOnNextCall(testStraightLineDupeElinination);
-  testStraightLineDupeElinination(new Array(5));
-  testStraightLineDupeElinination(new Array(5));
+  testStraightLineDupeElinination(new Array(5),0,0,0,0,0);
+  testStraightLineDupeElinination(new Array(5),0,0,0,0,0);
   assertTrue(2 != %GetOptimizationStatus(testStraightLineDupeElinination));
+  %ClearFunctionTypeFeedback(testStraightLineDupeElinination);
 }
diff --git a/deps/v8/test/mjsunit/error-accessors.js b/deps/v8/test/mjsunit/error-accessors.js
new file mode 100644
index 0000000000..9581050240
--- /dev/null
+++ b/deps/v8/test/mjsunit/error-accessors.js
@@ -0,0 +1,54 @@
+// Copyright 2012 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Test that the message property of error objects is a data property.
+
+var o;
+
+// message is constructed using the constructor.
+var error1 = new Error("custom message");
+o = {};
+o.__proto__ = error1;
+
+assertEquals("custom message",
+             Object.getOwnPropertyDescriptor(error1, "message").value);
+o.message = "another message";
+assertEquals("another message", o.message);
+assertEquals("custom message", error1.message);
+
+// message is constructed by the runtime.
+var error2;
+try { x.x } catch (e) { error2 = e; }
+o = {};
+o.__proto__ = error2;
+
+assertEquals("x is not defined",
+             Object.getOwnPropertyDescriptor(error2, "message").value);
+o.message = "another message";
+assertEquals("another message", o.message);
+assertEquals("x is not defined", error2.message);
+
diff --git a/deps/v8/test/mjsunit/error-constructors.js b/deps/v8/test/mjsunit/error-constructors.js
index 107164df56..84c6bbfd0c 100644
--- a/deps/v8/test/mjsunit/error-constructors.js
+++ b/deps/v8/test/mjsunit/error-constructors.js
@@ -36,10 +36,6 @@ assertFalse(desc['enumerable']);
 var e = new Error("foobar");
 desc = Object.getOwnPropertyDescriptor(e, 'message');
 assertFalse(desc['enumerable']);
-desc = Object.getOwnPropertyDescriptor(e, 'arguments');
-assertFalse(desc['enumerable']);
-desc = Object.getOwnPropertyDescriptor(e, 'type');
-assertFalse(desc['enumerable']);
 desc = Object.getOwnPropertyDescriptor(e, 'stack');
 assertFalse(desc['enumerable']);
 
@@ -57,26 +53,17 @@ for (var v in e) {
 function fail() { assertUnreachable(); };
 ReferenceError.prototype.__defineSetter__('name', fail);
 ReferenceError.prototype.__defineSetter__('message', fail);
-ReferenceError.prototype.__defineSetter__('type', fail);
-ReferenceError.prototype.__defineSetter__('arguments', fail);
 ReferenceError.prototype.__defineSetter__('stack', fail);
 
 var e = new ReferenceError();
 assertTrue(e.hasOwnProperty('stack'));
-assertTrue(e.hasOwnProperty('type'));
-assertTrue(e.hasOwnProperty('arguments'));
 
 var e = new ReferenceError('123');
 assertTrue(e.hasOwnProperty('message'));
 assertTrue(e.hasOwnProperty('stack'));
-assertTrue(e.hasOwnProperty('type'));
-assertTrue(e.hasOwnProperty('arguments'));
 
 var e = %MakeReferenceError("my_test_error", [0, 1]);
 assertTrue(e.hasOwnProperty('stack'));
-assertTrue(e.hasOwnProperty('type'));
-assertTrue(e.hasOwnProperty('arguments'));
-assertEquals("my_test_error", e.type)
 
 // Check that intercepting property access from toString is prevented for
 // compiler errors. This is not specified, but allowing interception
@@ -86,7 +73,7 @@ var errors = [SyntaxError, ReferenceError, TypeError];
 for (var i in errors) {
   var name = errors[i].prototype.toString();
   // Monkey-patch prototype.
-  var props = ["name", "message", "type", "arguments", "stack"];
+  var props = ["name", "message", "stack"];
   for (var j in props) {
     errors[i].prototype.__defineGetter__(props[j], fail);
   }
diff --git a/deps/v8/test/mjsunit/function-call.js b/deps/v8/test/mjsunit/function-call.js
index 26890ed113..92792ac827 100644
--- a/deps/v8/test/mjsunit/function-call.js
+++ b/deps/v8/test/mjsunit/function-call.js
@@ -67,8 +67,7 @@ var should_throw_on_null_and_undefined =
      String.prototype.toLocaleLowerCase,
      String.prototype.toUpperCase,
      String.prototype.toLocaleUpperCase,
-     String.prototype.trim,
-     Number.prototype.toLocaleString];
+     String.prototype.trim];
 
 // Non generic natives do not work on any input other than the specific
 // type, but since this change will allow call to be invoked with undefined
@@ -150,6 +149,11 @@ var reducing_functions =
     [Array.prototype.reduce,
      Array.prototype.reduceRight];
 
+function checkExpectedMessage(e) {
+  assertTrue(e.message.indexOf("called on null or undefined") >= 0 ||
+             e.message.indexOf("Cannot convert null to object") >= 0);
+}
+
 // Test that all natives using the ToObject call throw the right exception.
 for (var i = 0; i < should_throw_on_null_and_undefined.length; i++) {
   // Sanity check that all functions are correct
@@ -166,8 +170,7 @@ for (var i = 0; i < should_throw_on_null_and_undefined.length; i++) {
     should_throw_on_null_and_undefined[i].call(null);
   } catch (e) {
     exception = true;
-    assertTrue("called_on_null_or_undefined" == e.type ||
-               "null_to_object" == e.type);
+    checkExpectedMessage(e);
   }
   assertTrue(exception);
 
@@ -176,8 +179,7 @@ for (var i = 0; i < should_throw_on_null_and_undefined.length; i++) {
     should_throw_on_null_and_undefined[i].call(undefined);
   } catch (e) {
     exception = true;
-    assertTrue("called_on_null_or_undefined" == e.type ||
-               "null_to_object" == e.type);
+    checkExpectedMessage(e);
   }
   assertTrue(exception);
 
@@ -186,8 +188,7 @@ for (var i = 0; i < should_throw_on_null_and_undefined.length; i++) {
     should_throw_on_null_and_undefined[i].apply(null);
   } catch (e) {
     exception = true;
-    assertTrue("called_on_null_or_undefined" == e.type ||
-               "null_to_object" == e.type);
+    checkExpectedMessage(e);
   }
   assertTrue(exception);
 
@@ -196,8 +197,7 @@ for (var i = 0; i < should_throw_on_null_and_undefined.length; i++) {
     should_throw_on_null_and_undefined[i].apply(undefined);
   } catch (e) {
     exception = true;
-    assertTrue("called_on_null_or_undefined" == e.type ||
-               "null_to_object" == e.type);
+    checkExpectedMessage(e);
   }
   assertTrue(exception);
 }
@@ -257,8 +257,7 @@ for (var j = 0; j < mapping_functions.length; j++) {
                                 null);
     } catch (e) {
       exception = true;
-      assertTrue("called_on_null_or_undefined" == e.type ||
-                 "null_to_object" == e.type);
+      checkExpectedMessage(e);
     }
     assertTrue(exception);
 
@@ -269,8 +268,7 @@ for (var j = 0; j < mapping_functions.length; j++) {
                                 undefined);
     } catch (e) {
       exception = true;
-      assertTrue("called_on_null_or_undefined" == e.type ||
-                 "null_to_object" == e.type);
+      checkExpectedMessage(e);
     }
     assertTrue(exception);
   }
@@ -311,8 +309,7 @@ for (var j = 0; j < reducing_functions.length; j++) {
       reducing_functions[j].call(array, should_throw_on_null_and_undefined[i]);
     } catch (e) {
       exception = true;
-      assertTrue("called_on_null_or_undefined" == e.type ||
-                 "null_to_object" == e.type);
+      checkExpectedMessage(e);
     }
     assertTrue(exception);
 
@@ -321,8 +318,7 @@ for (var j = 0; j < reducing_functions.length; j++) {
       reducing_functions[j].call(array, should_throw_on_null_and_undefined[i]);
     } catch (e) {
       exception = true;
-      assertTrue("called_on_null_or_undefined" == e.type ||
-                 "null_to_object" == e.type);
+      checkExpectedMessage(e);
     }
     assertTrue(exception);
   }
diff --git a/deps/v8/test/mjsunit/fuzz-natives.js b/deps/v8/test/mjsunit/fuzz-natives-part1.js
index 225a44d8a5..87f7d0d766 100644
--- a/deps/v8/test/mjsunit/fuzz-natives.js
+++ b/deps/v8/test/mjsunit/fuzz-natives-part1.js
@@ -147,6 +147,7 @@ var knownProblems = {
   "PushWithContext": true,
   "PushCatchContext": true,
   "PushBlockContext": true,
+  "PushModuleContext": true,
   "LazyCompile": true,
   "LazyRecompile": true,
   "ParallelRecompile": true,
@@ -195,7 +196,13 @@ var knownProblems = {
 
   // Only applicable to strings.
   "_HasCachedArrayIndex": true,
-  "_GetCachedArrayIndex": true
+  "_GetCachedArrayIndex": true,
+  "_OneByteSeqStringSetChar": true,
+  "_TwoByteSeqStringSetChar": true,
+
+  // Only for debugging parallel recompilation.
+  "InstallRecompiledCode": true,
+  "ForceParallelRecompile": true
 };
 
 var currentlyUncallable = {
@@ -205,7 +212,9 @@ var currentlyUncallable = {
 
 function testNatives() {
   var allNatives = %ListNatives();
-  for (var i = 0; i < allNatives.length; i++) {
+  var start = 0;
+  var stop = (allNatives.length >> 2);
+  for (var i = start; i < stop; i++) {
     var nativeInfo = allNatives[i];
     var name = nativeInfo[0];
     if (name in knownProblems || name in currentlyUncallable)
diff --git a/deps/v8/test/mjsunit/fuzz-natives-part2.js b/deps/v8/test/mjsunit/fuzz-natives-part2.js
new file mode 100644
index 0000000000..2faad1dcac
--- /dev/null
+++ b/deps/v8/test/mjsunit/fuzz-natives-part2.js
@@ -0,0 +1,229 @@
+// Copyright 2011 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Flags: --allow-natives-syntax
+
+var RUN_WITH_ALL_ARGUMENT_ENTRIES = false;
+var kOnManyArgumentsRemove = 5;
+
+function makeArguments() {
+  var result = [ ];
+  result.push(17);
+  result.push(-31);
+  result.push(new Array(100));
+  result.push(new Array(100003));
+  result.push(Number.MIN_VALUE);
+  result.push("whoops");
+  result.push("x");
+  result.push({"x": 1, "y": 2});
+  var slowCaseObj = {"a": 3, "b": 4, "c": 5};
+  delete slowCaseObj.c;
+  result.push(slowCaseObj);
+  result.push(function () { return 8; });
+  return result;
+}
+
+var kArgObjects = makeArguments().length;
+
+function makeFunction(name, argc) {
+  var args = [];
+  for (var i = 0; i < argc; i++)
+    args.push("x" + i);
+  var argsStr = args.join(", ");
+  return new Function(args.join(", "), "return %" + name + "(" + argsStr + ");");
+}
+
+function testArgumentCount(name, argc) {
+  for (var i = 0; i < 10; i++) {
+    var func = null;
+    try {
+      func = makeFunction(name, i);
+    } catch (e) {
+      if (e != "SyntaxError: Illegal access") throw e;
+    }
+    if (func === null && i == argc) {
+      throw "unexpected exception";
+    }
+    var args = [ ];
+    for (var j = 0; j < i; j++)
+      args.push(0);
+    try {
+      func.apply(void 0, args);
+    } catch (e) {
+      // we don't care what happens as long as we don't crash
+    }
+  }
+}
+
+function testArgumentTypes(name, argc) {
+  var type = 0;
+  var hasMore = true;
+  var func = makeFunction(name, argc);
+  while (hasMore) {
+    var argPool = makeArguments();
+    // When we have 5 or more arguments we lower the amount of tests cases
+    // by randomly removing kOnManyArgumentsRemove entries
+    var numArguments = RUN_WITH_ALL_ARGUMENT_ENTRIES ?
+      kArgObjects : kArgObjects-kOnManyArgumentsRemove;
+    if (argc >= 5 && !RUN_WITH_ALL_ARGUMENT_ENTRIES) {
+      for (var i = 0; i < kOnManyArgumentsRemove; i++) {
+        var rand = Math.floor(Math.random() * (kArgObjects - i));
+        argPool.splice(rand,1);
+      }
+    }
+    var current = type;
+    var hasMore = false;
+    var argList = [ ];
+    for (var i = 0; i < argc; i++) {
+      var index = current % numArguments;
+      current = (current / numArguments) << 0;
+      if (index != (numArguments - 1))
+        hasMore = true;
+      argList.push(argPool[index]);
+    }
+    try {
+      func.apply(void 0, argList);
+    } catch (e) {
+      // we don't care what happens as long as we don't crash
+    }
+    type++;
+  }
+}
+
+var knownProblems = {
+  "Abort": true,
+
+  // Avoid calling the concat operation, because weird lengths
+  // may lead to out-of-memory.  Ditto for StringBuilderJoin.
+  "StringBuilderConcat": true,
+  "StringBuilderJoin": true,
+
+  // These functions use pseudo-stack-pointers and are not robust
+  // to unexpected integer values.
+  "DebugEvaluate": true,
+
+  // These functions do nontrivial error checking in recursive calls,
+  // which means that we have to propagate errors back.
+  "SetFunctionBreakPoint": true,
+  "SetScriptBreakPoint": true,
+  "PrepareStep": true,
+
+  // Too slow.
+  "DebugReferencedBy": true,
+
+  // Calling disable/enable access checks may interfere with the
+  // the rest of the tests.
+  "DisableAccessChecks": true,
+  "EnableAccessChecks": true,
+
+  // These functions should not be callable as runtime functions.
+  "NewFunctionContext": true,
+  "NewArgumentsFast": true,
+  "NewStrictArgumentsFast": true,
+  "PushWithContext": true,
+  "PushCatchContext": true,
+  "PushBlockContext": true,
+  "PushModuleContext": true,
+  "LazyCompile": true,
+  "LazyRecompile": true,
+  "ParallelRecompile": true,
+  "NotifyDeoptimized": true,
+  "NotifyOSR": true,
+  "CreateObjectLiteralBoilerplate": true,
+  "CloneLiteralBoilerplate": true,
+  "CloneShallowLiteralBoilerplate": true,
+  "CreateArrayLiteralBoilerplate": true,
+  "IS_VAR": true,
+  "ResolvePossiblyDirectEval": true,
+  "Log": true,
+  "DeclareGlobals": true,
+
+  "PromoteScheduledException": true,
+  "DeleteHandleScopeExtensions": true,
+
+  // Vararg with minimum number > 0.
+  "Call": true,
+
+  // Requires integer arguments to be non-negative.
+  "Apply": true,
+
+  // That can only be invoked on Array.prototype.
+  "FinishArrayPrototypeSetup": true,
+
+  "_SwapElements": true,
+
+  // Performance critical functions which cannot afford type checks.
+  "_IsNativeOrStrictMode": true,
+  "_CallFunction": true,
+
+  // Tries to allocate based on argument, and (correctly) throws
+  // out-of-memory if the request is too large. In practice, the
+  // size will be the number of captures of a RegExp.
+  "RegExpConstructResult": true,
+  "_RegExpConstructResult": true,
+
+  // This functions perform some checks compile time (they require one of their
+  // arguments to be a compile time smi).
+  "_DateField": true,
+  "_GetFromCache": true,
+
+  // This function expects its first argument to be a non-smi.
+  "_IsStringWrapperSafeForDefaultValueOf" : true,
+
+  // Only applicable to strings.
+  "_HasCachedArrayIndex": true,
+  "_GetCachedArrayIndex": true,
+  "_OneByteSeqStringSetChar": true,
+  "_TwoByteSeqStringSetChar": true,
+
+  // Only for debugging parallel recompilation.
+  "InstallRecompiledCode": true,
+  "ForceParallelRecompile": true
+};
+
+var currentlyUncallable = {
+  // We need to find a way to test this without breaking the system.
+  "SystemBreak": true
+};
+
+function testNatives() {
+  var allNatives = %ListNatives();
+  var start = allNatives.length >> 2;
+  var stop = (allNatives.length >> 2)*2;
+  for (var i = start; i < stop; i++) {
+    var nativeInfo = allNatives[i];
+    var name = nativeInfo[0];
+    if (name in knownProblems || name in currentlyUncallable)
+      continue;
+    print(name);
+    var argc = nativeInfo[1];
+    testArgumentCount(name, argc);
+    testArgumentTypes(name, argc);
+  }
+}
+
+testNatives();
diff --git a/deps/v8/test/mjsunit/fuzz-natives-part3.js b/deps/v8/test/mjsunit/fuzz-natives-part3.js
new file mode 100644
index 0000000000..ed71d332a0
--- /dev/null
+++ b/deps/v8/test/mjsunit/fuzz-natives-part3.js
@@ -0,0 +1,229 @@
+// Copyright 2011 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Flags: --allow-natives-syntax
+
+var RUN_WITH_ALL_ARGUMENT_ENTRIES = false;
+var kOnManyArgumentsRemove = 5;
+
+function makeArguments() {
+  var result = [ ];
+  result.push(17);
+  result.push(-31);
+  result.push(new Array(100));
+  result.push(new Array(100003));
+  result.push(Number.MIN_VALUE);
+  result.push("whoops");
+  result.push("x");
+  result.push({"x": 1, "y": 2});
+  var slowCaseObj = {"a": 3, "b": 4, "c": 5};
+  delete slowCaseObj.c;
+  result.push(slowCaseObj);
+  result.push(function () { return 8; });
+  return result;
+}
+
+var kArgObjects = makeArguments().length;
+
+function makeFunction(name, argc) {
+  var args = [];
+  for (var i = 0; i < argc; i++)
+    args.push("x" + i);
+  var argsStr = args.join(", ");
+  return new Function(args.join(", "), "return %" + name + "(" + argsStr + ");");
+}
+
+function testArgumentCount(name, argc) {
+  for (var i = 0; i < 10; i++) {
+    var func = null;
+    try {
+      func = makeFunction(name, i);
+    } catch (e) {
+      if (e != "SyntaxError: Illegal access") throw e;
+    }
+    if (func === null && i == argc) {
+      throw "unexpected exception";
+    }
+    var args = [ ];
+    for (var j = 0; j < i; j++)
+      args.push(0);
+    try {
+      func.apply(void 0, args);
+    } catch (e) {
+      // we don't care what happens as long as we don't crash
+    }
+  }
+}
+
+function testArgumentTypes(name, argc) {
+  var type = 0;
+  var hasMore = true;
+  var func = makeFunction(name, argc);
+  while (hasMore) {
+    var argPool = makeArguments();
+    // When we have 5 or more arguments we lower the amount of tests cases
+    // by randomly removing kOnManyArgumentsRemove entries
+    var numArguments = RUN_WITH_ALL_ARGUMENT_ENTRIES ?
+      kArgObjects : kArgObjects-kOnManyArgumentsRemove;
+    if (argc >= 5 && !RUN_WITH_ALL_ARGUMENT_ENTRIES) {
+      for (var i = 0; i < kOnManyArgumentsRemove; i++) {
+        var rand = Math.floor(Math.random() * (kArgObjects - i));
+        argPool.splice(rand,1);
+      }
+    }
+    var current = type;
+    var hasMore = false;
+    var argList = [ ];
+    for (var i = 0; i < argc; i++) {
+      var index = current % numArguments;
+      current = (current / numArguments) << 0;
+      if (index != (numArguments - 1))
+        hasMore = true;
+      argList.push(argPool[index]);
+    }
+    try {
+      func.apply(void 0, argList);
+    } catch (e) {
+      // we don't care what happens as long as we don't crash
+    }
+    type++;
+  }
+}
+
+var knownProblems = {
+  "Abort": true,
+
+  // Avoid calling the concat operation, because weird lengths
+  // may lead to out-of-memory.  Ditto for StringBuilderJoin.
+  "StringBuilderConcat": true,
+  "StringBuilderJoin": true,
+
+  // These functions use pseudo-stack-pointers and are not robust
+  // to unexpected integer values.
+  "DebugEvaluate": true,
+
+  // These functions do nontrivial error checking in recursive calls,
+  // which means that we have to propagate errors back.
+  "SetFunctionBreakPoint": true,
+  "SetScriptBreakPoint": true,
+  "PrepareStep": true,
+
+  // Too slow.
+  "DebugReferencedBy": true,
+
+  // Calling disable/enable access checks may interfere with the
+  // the rest of the tests.
+  "DisableAccessChecks": true,
+  "EnableAccessChecks": true,
+
+  // These functions should not be callable as runtime functions.
+  "NewFunctionContext": true,
+  "NewArgumentsFast": true,
+  "NewStrictArgumentsFast": true,
+  "PushWithContext": true,
+  "PushCatchContext": true,
+  "PushBlockContext": true,
+  "PushModuleContext": true,
+  "LazyCompile": true,
+  "LazyRecompile": true,
+  "ParallelRecompile": true,
+  "NotifyDeoptimized": true,
+  "NotifyOSR": true,
+  "CreateObjectLiteralBoilerplate": true,
+  "CloneLiteralBoilerplate": true,
+  "CloneShallowLiteralBoilerplate": true,
+  "CreateArrayLiteralBoilerplate": true,
+  "IS_VAR": true,
+  "ResolvePossiblyDirectEval": true,
+  "Log": true,
+  "DeclareGlobals": true,
+
+  "PromoteScheduledException": true,
+  "DeleteHandleScopeExtensions": true,
+
+  // Vararg with minimum number > 0.
+  "Call": true,
+
+  // Requires integer arguments to be non-negative.
+  "Apply": true,
+
+  // That can only be invoked on Array.prototype.
+  "FinishArrayPrototypeSetup": true,
+
+  "_SwapElements": true,
+
+  // Performance critical functions which cannot afford type checks.
+  "_IsNativeOrStrictMode": true,
+  "_CallFunction": true,
+
+  // Tries to allocate based on argument, and (correctly) throws
+  // out-of-memory if the request is too large. In practice, the
+  // size will be the number of captures of a RegExp.
+  "RegExpConstructResult": true,
+  "_RegExpConstructResult": true,
+
+  // This functions perform some checks compile time (they require one of their
+  // arguments to be a compile time smi).
+  "_DateField": true,
+  "_GetFromCache": true,
+
+  // This function expects its first argument to be a non-smi.
+  "_IsStringWrapperSafeForDefaultValueOf" : true,
+
+  // Only applicable to strings.
+  "_HasCachedArrayIndex": true,
+  "_GetCachedArrayIndex": true,
+  "_OneByteSeqStringSetChar": true,
+  "_TwoByteSeqStringSetChar": true,
+
+  // Only for debugging parallel recompilation.
+  "InstallRecompiledCode": true,
+  "ForceParallelRecompile": true
+};
+
+var currentlyUncallable = {
+  // We need to find a way to test this without breaking the system.
+  "SystemBreak": true
+};
+
+function testNatives() {
+  var allNatives = %ListNatives();
+  var start = (allNatives.length >> 2)*2;
+  var stop = (allNatives.length >> 2)*3;
+  for (var i = start; i < stop; i++) {
+    var nativeInfo = allNatives[i];
+    var name = nativeInfo[0];
+    if (name in knownProblems || name in currentlyUncallable)
+      continue;
+    print(name);
+    var argc = nativeInfo[1];
+    testArgumentCount(name, argc);
+    testArgumentTypes(name, argc);
+  }
+}
+
+testNatives();
diff --git a/deps/v8/test/mjsunit/fuzz-natives-part4.js b/deps/v8/test/mjsunit/fuzz-natives-part4.js
new file mode 100644
index 0000000000..1b128d5942
--- /dev/null
+++ b/deps/v8/test/mjsunit/fuzz-natives-part4.js
@@ -0,0 +1,229 @@
+// Copyright 2011 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Flags: --allow-natives-syntax
+
+var RUN_WITH_ALL_ARGUMENT_ENTRIES = false;
+var kOnManyArgumentsRemove = 5;
+
+function makeArguments() {
+  var result = [ ];
+  result.push(17);
+  result.push(-31);
+  result.push(new Array(100));
+  result.push(new Array(100003));
+  result.push(Number.MIN_VALUE);
+  result.push("whoops");
+  result.push("x");
+  result.push({"x": 1, "y": 2});
+  var slowCaseObj = {"a": 3, "b": 4, "c": 5};
+  delete slowCaseObj.c;
+  result.push(slowCaseObj);
+  result.push(function () { return 8; });
+  return result;
+}
+
+var kArgObjects = makeArguments().length;
+
+function makeFunction(name, argc) {
+  var args = [];
+  for (var i = 0; i < argc; i++)
+    args.push("x" + i);
+  var argsStr = args.join(", ");
+  return new Function(args.join(", "), "return %" + name + "(" + argsStr + ");");
+}
+
+function testArgumentCount(name, argc) {
+  for (var i = 0; i < 10; i++) {
+    var func = null;
+    try {
+      func = makeFunction(name, i);
+    } catch (e) {
+      if (e != "SyntaxError: Illegal access") throw e;
+    }
+    if (func === null && i == argc) {
+      throw "unexpected exception";
+    }
+    var args = [ ];
+    for (var j = 0; j < i; j++)
+      args.push(0);
+    try {
+      func.apply(void 0, args);
+    } catch (e) {
+      // we don't care what happens as long as we don't crash
+    }
+  }
+}
+
+function testArgumentTypes(name, argc) {
+  var type = 0;
+  var hasMore = true;
+  var func = makeFunction(name, argc);
+  while (hasMore) {
+    var argPool = makeArguments();
+    // When we have 5 or more arguments we lower the amount of tests cases
+    // by randomly removing kOnManyArgumentsRemove entries
+    var numArguments = RUN_WITH_ALL_ARGUMENT_ENTRIES ?
+      kArgObjects : kArgObjects-kOnManyArgumentsRemove;
+    if (argc >= 5 && !RUN_WITH_ALL_ARGUMENT_ENTRIES) {
+      for (var i = 0; i < kOnManyArgumentsRemove; i++) {
+        var rand = Math.floor(Math.random() * (kArgObjects - i));
+        argPool.splice(rand,1);
+      }
+    }
+    var current = type;
+    var hasMore = false;
+    var argList = [ ];
+    for (var i = 0; i < argc; i++) {
+      var index = current % numArguments;
+      current = (current / numArguments) << 0;
+      if (index != (numArguments - 1))
+        hasMore = true;
+      argList.push(argPool[index]);
+    }
+    try {
+      func.apply(void 0, argList);
+    } catch (e) {
+      // we don't care what happens as long as we don't crash
+    }
+    type++;
+  }
+}
+
+var knownProblems = {
+  "Abort": true,
+
+  // Avoid calling the concat operation, because weird lengths
+  // may lead to out-of-memory.  Ditto for StringBuilderJoin.
+  "StringBuilderConcat": true,
+  "StringBuilderJoin": true,
+
+  // These functions use pseudo-stack-pointers and are not robust
+  // to unexpected integer values.
+  "DebugEvaluate": true,
+
+  // These functions do nontrivial error checking in recursive calls,
+  // which means that we have to propagate errors back.
+  "SetFunctionBreakPoint": true,
+  "SetScriptBreakPoint": true,
+  "PrepareStep": true,
+
+  // Too slow.
+  "DebugReferencedBy": true,
+
+  // Calling disable/enable access checks may interfere with the
+  // the rest of the tests.
+  "DisableAccessChecks": true,
+  "EnableAccessChecks": true,
+
+  // These functions should not be callable as runtime functions.
+  "NewFunctionContext": true,
+  "NewArgumentsFast": true,
+  "NewStrictArgumentsFast": true,
+  "PushWithContext": true,
+  "PushCatchContext": true,
+  "PushBlockContext": true,
+  "PushModuleContext": true,
+  "LazyCompile": true,
+  "LazyRecompile": true,
+  "ParallelRecompile": true,
+  "NotifyDeoptimized": true,
+  "NotifyOSR": true,
+  "CreateObjectLiteralBoilerplate": true,
+  "CloneLiteralBoilerplate": true,
+  "CloneShallowLiteralBoilerplate": true,
+  "CreateArrayLiteralBoilerplate": true,
+  "IS_VAR": true,
+  "ResolvePossiblyDirectEval": true,
+  "Log": true,
+  "DeclareGlobals": true,
+
+  "PromoteScheduledException": true,
+  "DeleteHandleScopeExtensions": true,
+
+  // Vararg with minimum number > 0.
+  "Call": true,
+
+  // Requires integer arguments to be non-negative.
+  "Apply": true,
+
+  // That can only be invoked on Array.prototype.
+  "FinishArrayPrototypeSetup": true,
+
+  "_SwapElements": true,
+
+  // Performance critical functions which cannot afford type checks.
+  "_IsNativeOrStrictMode": true,
+  "_CallFunction": true,
+
+  // Tries to allocate based on argument, and (correctly) throws
+  // out-of-memory if the request is too large. In practice, the
+  // size will be the number of captures of a RegExp.
+  "RegExpConstructResult": true,
+  "_RegExpConstructResult": true,
+
+  // This functions perform some checks compile time (they require one of their
+  // arguments to be a compile time smi).
+  "_DateField": true,
+  "_GetFromCache": true,
+
+  // This function expects its first argument to be a non-smi.
+  "_IsStringWrapperSafeForDefaultValueOf" : true,
+
+  // Only applicable to strings.
+  "_HasCachedArrayIndex": true,
+  "_GetCachedArrayIndex": true,
+  "_OneByteSeqStringSetChar": true,
+  "_TwoByteSeqStringSetChar": true,
+
+  // Only for debugging parallel recompilation.
+  "InstallRecompiledCode": true,
+  "ForceParallelRecompile": true
+};
+
+var currentlyUncallable = {
+  // We need to find a way to test this without breaking the system.
+  "SystemBreak": true
+};
+
+function testNatives() {
+  var allNatives = %ListNatives();
+  var start = (allNatives.length >> 2)*3;
+  var stop = allNatives.length;
+  for (var i = start; i < stop; i++) {
+    var nativeInfo = allNatives[i];
+    var name = nativeInfo[0];
+    if (name in knownProblems || name in currentlyUncallable)
+      continue;
+    print(name);
+    var argc = nativeInfo[1];
+    testArgumentCount(name, argc);
+    testArgumentTypes(name, argc);
+  }
+}
+
+testNatives();
diff --git a/deps/v8/test/mjsunit/greedy.js b/deps/v8/test/mjsunit/greedy.js
index d357f0cad3..8c49e41b9c 100644
--- a/deps/v8/test/mjsunit/greedy.js
+++ b/deps/v8/test/mjsunit/greedy.js
@@ -25,7 +25,7 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-// Flags: --gc-greedy
+// Flags: --gc-greedy --noverify-heap
 
 function IterativeFib(n) {
   var f0 = 0, f1 = 1;
diff --git a/deps/v8/test/mjsunit/harmony/collections.js b/deps/v8/test/mjsunit/harmony/collections.js
index f3db7ea2b7..0219f39364 100644
--- a/deps/v8/test/mjsunit/harmony/collections.js
+++ b/deps/v8/test/mjsunit/harmony/collections.js
@@ -313,4 +313,60 @@ TestBogusReceivers(bogusReceiversTestSet);
 // Stress Test
 // There is a proposed stress-test available at the es-discuss mailing list
 // which cannot be reasonably automated.  Check it out by hand if you like:
-// https://mail.mozilla.org/pipermail/es-discuss/2011-May/014096.html
\ No newline at end of file
+// https://mail.mozilla.org/pipermail/es-discuss/2011-May/014096.html
+
+
+// Set and Map size getters
+var setSizeDescriptor = Object.getOwnPropertyDescriptor(Set.prototype, 'size');
+assertEquals(undefined, setSizeDescriptor.value);
+assertEquals(undefined, setSizeDescriptor.set);
+assertTrue(setSizeDescriptor.get instanceof Function);
+assertEquals(undefined, setSizeDescriptor.get.prototype);
+assertFalse(setSizeDescriptor.enumerable);
+assertTrue(setSizeDescriptor.configurable);
+
+var s = new Set();
+assertFalse(s.hasOwnProperty('size'));
+for (var i = 0; i < 10; i++) {
+  assertEquals(i, s.size);
+  s.add(i);
+}
+for (var i = 9; i >= 0; i--) {
+  s.delete(i);
+  assertEquals(i, s.size);
+}
+
+
+var mapSizeDescriptor = Object.getOwnPropertyDescriptor(Map.prototype, 'size');
+assertEquals(undefined, mapSizeDescriptor.value);
+assertEquals(undefined, mapSizeDescriptor.set);
+assertTrue(mapSizeDescriptor.get instanceof Function);
+assertEquals(undefined, mapSizeDescriptor.get.prototype);
+assertFalse(mapSizeDescriptor.enumerable);
+assertTrue(mapSizeDescriptor.configurable);
+
+var m = new Map();
+assertFalse(m.hasOwnProperty('size'));
+for (var i = 0; i < 10; i++) {
+  assertEquals(i, m.size);
+  m.set(i, i);
+}
+for (var i = 9; i >= 0; i--) {
+  m.delete(i);
+  assertEquals(i, m.size);
+}
+
+// Test clear
+var a = new Set();
+s.add(42);
+assertTrue(s.has(42));
+s.clear();
+assertFalse(s.has(42));
+assertEquals(0, s.size);
+
+var m = new Map();
+m.set(42, true);
+assertTrue(m.has(42));
+m.clear();
+assertFalse(m.has(42));
+assertEquals(0, m.size);
diff --git a/deps/v8/test/mjsunit/harmony/debug-blockscopes.js b/deps/v8/test/mjsunit/harmony/debug-blockscopes.js
index 10aac2dbd4..ca2ab9e5a6 100644
--- a/deps/v8/test/mjsunit/harmony/debug-blockscopes.js
+++ b/deps/v8/test/mjsunit/harmony/debug-blockscopes.js
@@ -376,7 +376,7 @@ listener_delegate = function(exec_state) {
                    debug.ScopeType.Global], exec_state);
   CheckScopeContent({x:'y'}, 0, exec_state);
   // The function scope contains a temporary iteration variable.
-  CheckScopeContent({x:'y'}, 1, exec_state);
+  CheckScopeContent({'.for.x':'y'}, 1, exec_state);
 };
 for_loop_1();
 EndTest();
@@ -401,7 +401,7 @@ listener_delegate = function(exec_state) {
   CheckScopeContent({x:3}, 0, exec_state);
   CheckScopeContent({x:'y'}, 1, exec_state);
   // The function scope contains a temporary iteration variable.
-  CheckScopeContent({x:'y'}, 2, exec_state);
+  CheckScopeContent({'.for.x':'y'}, 2, exec_state);
 };
 for_loop_2();
 EndTest();
diff --git a/deps/v8/test/mjsunit/harmony/module-linking.js b/deps/v8/test/mjsunit/harmony/module-linking.js
index a4b272f468..3c0f18c37d 100644
--- a/deps/v8/test/mjsunit/harmony/module-linking.js
+++ b/deps/v8/test/mjsunit/harmony/module-linking.js
@@ -112,7 +112,7 @@ module R {
   assertThrows(function() { eval("c = -1") }, SyntaxError)
   assertThrows(function() { R.c = -2 }, TypeError)
 
-  // Initialize first bunch or variables.
+  // Initialize first bunch of variables.
   export var v = 1
   export let l = 2
   export const c = 3
diff --git a/deps/v8/test/mjsunit/harmony/module-parsing.js b/deps/v8/test/mjsunit/harmony/module-parsing.js
index 03948e31b9..8a9103d132 100644
--- a/deps/v8/test/mjsunit/harmony/module-parsing.js
+++ b/deps/v8/test/mjsunit/harmony/module-parsing.js
@@ -162,3 +162,29 @@ try {} catch (module) {}
 
 module
 v = 20
+
+
+
+// Check that module declarations are rejected in eval or local scope.
+
+module M { export let x; }
+
+assertThrows("export x;", SyntaxError);  // It's using eval, so should throw.
+assertThrows("export let x;", SyntaxError);
+assertThrows("import x from M;", SyntaxError);
+assertThrows("module M {};", SyntaxError);
+
+assertThrows("{ export x; }", SyntaxError);
+assertThrows("{ export let x; }", SyntaxError);
+assertThrows("{ import x from M; }", SyntaxError);
+assertThrows("{ module M {}; }", SyntaxError);
+
+assertThrows("function f() { export x; }", SyntaxError);
+assertThrows("function f() { export let x; }", SyntaxError);
+assertThrows("function f() { import x from M; }", SyntaxError);
+assertThrows("function f() { module M {}; }", SyntaxError);
+
+assertThrows("function f() { { export x; } }", SyntaxError);
+assertThrows("function f() { { export let x; } }", SyntaxError);
+assertThrows("function f() { { import x from M; } }", SyntaxError);
+assertThrows("function f() { { module M {}; } }", SyntaxError);
diff --git a/deps/v8/test/mjsunit/harmony/object-observe.js b/deps/v8/test/mjsunit/harmony/object-observe.js
new file mode 100644
index 0000000000..04dfb967b3
--- /dev/null
+++ b/deps/v8/test/mjsunit/harmony/object-observe.js
@@ -0,0 +1,873 @@
+// Copyright 2012 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Flags: --harmony-observation --harmony-proxies --harmony-collections
+
+var allObservers = [];
+function reset() {
+  allObservers.forEach(function(observer) { observer.reset(); });
+}
+
+function stringifyNoThrow(arg) {
+  try {
+    return JSON.stringify(arg);
+  } catch (e) {
+    return '{<circular reference>}';
+  }
+}
+
+function createObserver() {
+  "use strict";  // So that |this| in callback can be undefined.
+
+  var observer = {
+    records: undefined,
+    callbackCount: 0,
+    reset: function() {
+      this.records = undefined;
+      this.callbackCount = 0;
+    },
+    assertNotCalled: function() {
+      assertEquals(undefined, this.records);
+      assertEquals(0, this.callbackCount);
+    },
+    assertCalled: function() {
+      assertEquals(1, this.callbackCount);
+    },
+    assertRecordCount: function(count) {
+      this.assertCalled();
+      assertEquals(count, this.records.length);
+    },
+    assertCallbackRecords: function(recs) {
+      this.assertRecordCount(recs.length);
+      for (var i = 0; i < recs.length; i++) {
+        if ('name' in recs[i])
+          recs[i].name = String(recs[i].name);
+        print(i, stringifyNoThrow(this.records[i]), stringifyNoThrow(recs[i]));
+        assertSame(this.records[i].object, recs[i].object);
+        assertEquals('string', typeof recs[i].type);
+        assertPropertiesEqual(this.records[i], recs[i]);
+      }
+    }
+  };
+
+  observer.callback = function(r) {
+    assertEquals(undefined, this);
+    assertEquals('object', typeof r);
+    assertTrue(r instanceof Array)
+    observer.records = r;
+    observer.callbackCount++;
+  };
+
+  observer.reset();
+  allObservers.push(observer);
+  return observer;
+}
+
+var observer = createObserver();
+assertEquals("function", typeof observer.callback);
+var obj = {};
+
+function frozenFunction() {}
+Object.freeze(frozenFunction);
+var nonFunction = {};
+var changeRecordWithAccessor = { type: 'foo' };
+var recordCreated = false;
+Object.defineProperty(changeRecordWithAccessor, 'name', {
+  get: function() {
+    recordCreated = true;
+    return "bar";
+  },
+  enumerable: true
+})
+
+// Object.observe
+assertThrows(function() { Object.observe("non-object", observer.callback); }, TypeError);
+assertThrows(function() { Object.observe(obj, nonFunction); }, TypeError);
+assertThrows(function() { Object.observe(obj, frozenFunction); }, TypeError);
+assertEquals(obj, Object.observe(obj, observer.callback));
+
+// Object.unobserve
+assertThrows(function() { Object.unobserve(4, observer.callback); }, TypeError);
+assertThrows(function() { Object.unobserve(obj, nonFunction); }, TypeError);
+assertEquals(obj, Object.unobserve(obj, observer.callback));
+
+// Object.getNotifier
+var notifier = Object.getNotifier(obj);
+assertSame(notifier, Object.getNotifier(obj));
+assertEquals(null, Object.getNotifier(Object.freeze({})));
+assertFalse(notifier.hasOwnProperty('notify'));
+assertEquals([], Object.keys(notifier));
+var notifyDesc = Object.getOwnPropertyDescriptor(notifier.__proto__, 'notify');
+assertTrue(notifyDesc.configurable);
+assertTrue(notifyDesc.writable);
+assertFalse(notifyDesc.enumerable);
+assertThrows(function() { notifier.notify({}); }, TypeError);
+assertThrows(function() { notifier.notify({ type: 4 }); }, TypeError);
+var notify = notifier.notify;
+assertThrows(function() { notify.call(undefined, { type: 'a' }); }, TypeError);
+assertThrows(function() { notify.call(null, { type: 'a' }); }, TypeError);
+assertThrows(function() { notify.call(5, { type: 'a' }); }, TypeError);
+assertThrows(function() { notify.call('hello', { type: 'a' }); }, TypeError);
+assertThrows(function() { notify.call(false, { type: 'a' }); }, TypeError);
+assertThrows(function() { notify.call({}, { type: 'a' }); }, TypeError);
+assertFalse(recordCreated);
+notifier.notify(changeRecordWithAccessor);
+assertFalse(recordCreated);  // not observed yet
+
+// Object.deliverChangeRecords
+assertThrows(function() { Object.deliverChangeRecords(nonFunction); }, TypeError);
+
+Object.observe(obj, observer.callback);
+
+// notify uses to [[CreateOwnProperty]] to create changeRecord;
+reset();
+var protoExpandoAccessed = false;
+Object.defineProperty(Object.prototype, 'protoExpando',
+  {
+    configurable: true,
+    set: function() { protoExpandoAccessed = true; }
+  }
+);
+notifier.notify({ type: 'foo', protoExpando: 'val'});
+assertFalse(protoExpandoAccessed);
+delete Object.prototype.protoExpando;
+Object.deliverChangeRecords(observer.callback);
+
+// Multiple records are delivered.
+reset();
+notifier.notify({
+  type: 'updated',
+  name: 'foo',
+  expando: 1
+});
+
+notifier.notify({
+  object: notifier,  // object property is ignored
+  type: 'deleted',
+  name: 'bar',
+  expando2: 'str'
+});
+Object.deliverChangeRecords(observer.callback);
+observer.assertCallbackRecords([
+  { object: obj, name: 'foo', type: 'updated', expando: 1 },
+  { object: obj, name: 'bar', type: 'deleted', expando2: 'str' }
+]);
+
+// No delivery takes place if no records are pending
+reset();
+Object.deliverChangeRecords(observer.callback);
+observer.assertNotCalled();
+
+// Multiple observation has no effect.
+reset();
+Object.observe(obj, observer.callback);
+Object.observe(obj, observer.callback);
+Object.getNotifier(obj).notify({
+  type: 'foo',
+});
+Object.deliverChangeRecords(observer.callback);
+observer.assertCalled();
+
+// Observation can be stopped.
+reset();
+Object.unobserve(obj, observer.callback);
+Object.getNotifier(obj).notify({
+  type: 'foo',
+});
+Object.deliverChangeRecords(observer.callback);
+observer.assertNotCalled();
+
+// Multiple unobservation has no effect
+reset();
+Object.unobserve(obj, observer.callback);
+Object.unobserve(obj, observer.callback);
+Object.getNotifier(obj).notify({
+  type: 'foo',
+});
+Object.deliverChangeRecords(observer.callback);
+observer.assertNotCalled();
+
+// Re-observation works and only includes changeRecords after of call.
+reset();
+Object.getNotifier(obj).notify({
+  type: 'foo',
+});
+Object.observe(obj, observer.callback);
+Object.getNotifier(obj).notify({
+  type: 'foo',
+});
+records = undefined;
+Object.deliverChangeRecords(observer.callback);
+observer.assertRecordCount(1);
+
+// Observing a continuous stream of changes, while itermittantly unobserving.
+reset();
+Object.observe(obj, observer.callback);
+Object.getNotifier(obj).notify({
+  type: 'foo',
+  val: 1
+});
+
+Object.unobserve(obj, observer.callback);
+Object.getNotifier(obj).notify({
+  type: 'foo',
+  val: 2
+});
+
+Object.observe(obj, observer.callback);
+Object.getNotifier(obj).notify({
+  type: 'foo',
+  val: 3
+});
+
+Object.unobserve(obj, observer.callback);
+Object.getNotifier(obj).notify({
+  type: 'foo',
+  val: 4
+});
+
+Object.observe(obj, observer.callback);
+Object.getNotifier(obj).notify({
+  type: 'foo',
+  val: 5
+});
+
+Object.unobserve(obj, observer.callback);
+Object.deliverChangeRecords(observer.callback);
+observer.assertCallbackRecords([
+  { object: obj, type: 'foo', val: 1 },
+  { object: obj, type: 'foo', val: 3 },
+  { object: obj, type: 'foo', val: 5 }
+]);
+
+// Observing multiple objects; records appear in order.
+reset();
+var obj2 = {};
+var obj3 = {}
+Object.observe(obj, observer.callback);
+Object.observe(obj3, observer.callback);
+Object.observe(obj2, observer.callback);
+Object.getNotifier(obj).notify({
+  type: 'foo1',
+});
+Object.getNotifier(obj2).notify({
+  type: 'foo2',
+});
+Object.getNotifier(obj3).notify({
+  type: 'foo3',
+});
+Object.observe(obj3, observer.callback);
+Object.deliverChangeRecords(observer.callback);
+observer.assertCallbackRecords([
+  { object: obj, type: 'foo1' },
+  { object: obj2, type: 'foo2' },
+  { object: obj3, type: 'foo3' }
+]);
+
+// Observing named properties.
+reset();
+var obj = {a: 1}
+Object.observe(obj, observer.callback);
+obj.a = 2;
+obj["a"] = 3;
+delete obj.a;
+obj.a = 4;
+obj.a = 4;  // ignored
+obj.a = 5;
+Object.defineProperty(obj, "a", {value: 6});
+Object.defineProperty(obj, "a", {writable: false});
+obj.a = 7;  // ignored
+Object.defineProperty(obj, "a", {value: 8});
+Object.defineProperty(obj, "a", {value: 7, writable: true});
+Object.defineProperty(obj, "a", {get: function() {}});
+Object.defineProperty(obj, "a", {get: frozenFunction});
+Object.defineProperty(obj, "a", {get: frozenFunction});  // ignored
+Object.defineProperty(obj, "a", {get: frozenFunction, set: frozenFunction});
+Object.defineProperty(obj, "a", {set: frozenFunction});  // ignored
+Object.defineProperty(obj, "a", {get: undefined, set: frozenFunction});
+delete obj.a;
+delete obj.a;
+Object.defineProperty(obj, "a", {get: function() {}, configurable: true});
+Object.defineProperty(obj, "a", {value: 9, writable: true});
+obj.a = 10;
+delete obj.a;
+Object.defineProperty(obj, "a", {value: 11, configurable: true});
+Object.deliverChangeRecords(observer.callback);
+observer.assertCallbackRecords([
+  { object: obj, name: "a", type: "updated", oldValue: 1 },
+  { object: obj, name: "a", type: "updated", oldValue: 2 },
+  { object: obj, name: "a", type: "deleted", oldValue: 3 },
+  { object: obj, name: "a", type: "new" },
+  { object: obj, name: "a", type: "updated", oldValue: 4 },
+  { object: obj, name: "a", type: "updated", oldValue: 5 },
+  { object: obj, name: "a", type: "reconfigured", oldValue: 6 },
+  { object: obj, name: "a", type: "updated", oldValue: 6 },
+  { object: obj, name: "a", type: "reconfigured", oldValue: 8 },
+  { object: obj, name: "a", type: "reconfigured", oldValue: 7 },
+  { object: obj, name: "a", type: "reconfigured" },
+  { object: obj, name: "a", type: "reconfigured" },
+  { object: obj, name: "a", type: "reconfigured" },
+  { object: obj, name: "a", type: "deleted" },
+  { object: obj, name: "a", type: "new" },
+  { object: obj, name: "a", type: "reconfigured" },
+  { object: obj, name: "a", type: "updated", oldValue: 9 },
+  { object: obj, name: "a", type: "deleted", oldValue: 10 },
+  { object: obj, name: "a", type: "new" },
+]);
+
+// Observing indexed properties.
+reset();
+var obj = {'1': 1}
+Object.observe(obj, observer.callback);
+obj[1] = 2;
+obj[1] = 3;
+delete obj[1];
+obj[1] = 4;
+obj[1] = 4;  // ignored
+obj[1] = 5;
+Object.defineProperty(obj, "1", {value: 6});
+Object.defineProperty(obj, "1", {writable: false});
+obj[1] = 7;  // ignored
+Object.defineProperty(obj, "1", {value: 8});
+Object.defineProperty(obj, "1", {value: 7, writable: true});
+Object.defineProperty(obj, "1", {get: function() {}});
+Object.defineProperty(obj, "1", {get: frozenFunction});
+Object.defineProperty(obj, "1", {get: frozenFunction});  // ignored
+Object.defineProperty(obj, "1", {get: frozenFunction, set: frozenFunction});
+Object.defineProperty(obj, "1", {set: frozenFunction});  // ignored
+Object.defineProperty(obj, "1", {get: undefined, set: frozenFunction});
+delete obj[1];
+delete obj[1];
+Object.defineProperty(obj, "1", {get: function() {}, configurable: true});
+Object.defineProperty(obj, "1", {value: 9, writable: true});
+obj[1] = 10;
+delete obj[1];
+Object.defineProperty(obj, "1", {value: 11, configurable: true});
+Object.deliverChangeRecords(observer.callback);
+observer.assertCallbackRecords([
+  { object: obj, name: "1", type: "updated", oldValue: 1 },
+  { object: obj, name: "1", type: "updated", oldValue: 2 },
+  { object: obj, name: "1", type: "deleted", oldValue: 3 },
+  { object: obj, name: "1", type: "new" },
+  { object: obj, name: "1", type: "updated", oldValue: 4 },
+  { object: obj, name: "1", type: "updated", oldValue: 5 },
+  { object: obj, name: "1", type: "reconfigured", oldValue: 6 },
+  { object: obj, name: "1", type: "updated", oldValue: 6 },
+  { object: obj, name: "1", type: "reconfigured", oldValue: 8 },
+  { object: obj, name: "1", type: "reconfigured", oldValue: 7 },
+  { object: obj, name: "1", type: "reconfigured" },
+  { object: obj, name: "1", type: "reconfigured" },
+  { object: obj, name: "1", type: "reconfigured" },
+  { object: obj, name: "1", type: "deleted" },
+  { object: obj, name: "1", type: "new" },
+  { object: obj, name: "1", type: "reconfigured" },
+  { object: obj, name: "1", type: "updated", oldValue: 9 },
+  { object: obj, name: "1", type: "deleted", oldValue: 10 },
+  { object: obj, name: "1", type: "new" },
+]);
+
+
+// Test all kinds of objects generically.
+function TestObserveConfigurable(obj, prop) {
+  reset();
+  obj[prop] = 1;
+  Object.observe(obj, observer.callback);
+  obj[prop] = 2;
+  obj[prop] = 3;
+  delete obj[prop];
+  obj[prop] = 4;
+  obj[prop] = 4;  // ignored
+  obj[prop] = 5;
+  Object.defineProperty(obj, prop, {value: 6});
+  Object.defineProperty(obj, prop, {writable: false});
+  obj[prop] = 7;  // ignored
+  Object.defineProperty(obj, prop, {value: 8});
+  Object.defineProperty(obj, prop, {value: 7, writable: true});
+  Object.defineProperty(obj, prop, {get: function() {}});
+  Object.defineProperty(obj, prop, {get: frozenFunction});
+  Object.defineProperty(obj, prop, {get: frozenFunction});  // ignored
+  Object.defineProperty(obj, prop, {get: frozenFunction, set: frozenFunction});
+  Object.defineProperty(obj, prop, {set: frozenFunction});  // ignored
+  Object.defineProperty(obj, prop, {get: undefined, set: frozenFunction});
+  obj.__defineSetter__(prop, frozenFunction);  // ignored
+  obj.__defineSetter__(prop, function() {});
+  obj.__defineGetter__(prop, function() {});
+  delete obj[prop];
+  delete obj[prop];  // ignored
+  obj.__defineGetter__(prop, function() {});
+  delete obj[prop];
+  Object.defineProperty(obj, prop, {get: function() {}, configurable: true});
+  Object.defineProperty(obj, prop, {value: 9, writable: true});
+  obj[prop] = 10;
+  delete obj[prop];
+  Object.defineProperty(obj, prop, {value: 11, configurable: true});
+  Object.deliverChangeRecords(observer.callback);
+  observer.assertCallbackRecords([
+    { object: obj, name: prop, type: "updated", oldValue: 1 },
+    { object: obj, name: prop, type: "updated", oldValue: 2 },
+    { object: obj, name: prop, type: "deleted", oldValue: 3 },
+    { object: obj, name: prop, type: "new" },
+    { object: obj, name: prop, type: "updated", oldValue: 4 },
+    { object: obj, name: prop, type: "updated", oldValue: 5 },
+    { object: obj, name: prop, type: "reconfigured", oldValue: 6 },
+    { object: obj, name: prop, type: "updated", oldValue: 6 },
+    { object: obj, name: prop, type: "reconfigured", oldValue: 8 },
+    { object: obj, name: prop, type: "reconfigured", oldValue: 7 },
+    { object: obj, name: prop, type: "reconfigured" },
+    { object: obj, name: prop, type: "reconfigured" },
+    { object: obj, name: prop, type: "reconfigured" },
+    { object: obj, name: prop, type: "reconfigured" },
+    { object: obj, name: prop, type: "reconfigured" },
+    { object: obj, name: prop, type: "deleted" },
+    { object: obj, name: prop, type: "new" },
+    { object: obj, name: prop, type: "deleted" },
+    { object: obj, name: prop, type: "new" },
+    { object: obj, name: prop, type: "reconfigured" },
+    { object: obj, name: prop, type: "updated", oldValue: 9 },
+    { object: obj, name: prop, type: "deleted", oldValue: 10 },
+    { object: obj, name: prop, type: "new" },
+  ]);
+  Object.unobserve(obj, observer.callback);
+  delete obj[prop];
+}
+
+function TestObserveNonConfigurable(obj, prop, desc) {
+  reset();
+  obj[prop] = 1;
+  Object.observe(obj, observer.callback);
+  obj[prop] = 4;
+  obj[prop] = 4;  // ignored
+  obj[prop] = 5;
+  Object.defineProperty(obj, prop, {value: 6});
+  Object.defineProperty(obj, prop, {value: 6});  // ignored
+  Object.defineProperty(obj, prop, {value: 7});
+  Object.defineProperty(obj, prop,
+                        {enumerable: desc.enumerable});  // ignored
+  Object.defineProperty(obj, prop, {writable: false});
+  obj[prop] = 7;  // ignored
+  Object.deliverChangeRecords(observer.callback);
+  observer.assertCallbackRecords([
+    { object: obj, name: prop, type: "updated", oldValue: 1 },
+    { object: obj, name: prop, type: "updated", oldValue: 4 },
+    { object: obj, name: prop, type: "updated", oldValue: 5 },
+    { object: obj, name: prop, type: "updated", oldValue: 6 },
+    { object: obj, name: prop, type: "reconfigured", oldValue: 7 },
+  ]);
+  Object.unobserve(obj, observer.callback);
+}
+
+function createProxy(create, x) {
+  var handler = {
+    getPropertyDescriptor: function(k) {
+      for (var o = this.target; o; o = Object.getPrototypeOf(o)) {
+        var desc = Object.getOwnPropertyDescriptor(o, k);
+        if (desc) return desc;
+      }
+      return undefined;
+    },
+    getOwnPropertyDescriptor: function(k) {
+      return Object.getOwnPropertyDescriptor(this.target, k);
+    },
+    defineProperty: function(k, desc) {
+      var x = Object.defineProperty(this.target, k, desc);
+      Object.deliverChangeRecords(this.callback);
+      return x;
+    },
+    delete: function(k) {
+      var x = delete this.target[k];
+      Object.deliverChangeRecords(this.callback);
+      return x;
+    },
+    getPropertyNames: function() {
+      return Object.getOwnPropertyNames(this.target);
+    },
+    target: {isProxy: true},
+    callback: function(changeRecords) {
+      print("callback", stringifyNoThrow(handler.proxy), stringifyNoThrow(got));
+      for (var i in changeRecords) {
+        var got = changeRecords[i];
+        var change = {object: handler.proxy, name: got.name, type: got.type};
+        if ("oldValue" in got) change.oldValue = got.oldValue;
+        Object.getNotifier(handler.proxy).notify(change);
+      }
+    },
+  };
+  Object.observe(handler.target, handler.callback);
+  return handler.proxy = create(handler, x);
+}
+
+var objects = [
+  {},
+  [],
+  this,  // global object
+  function(){},
+  (function(){ return arguments })(),
+  (function(){ "use strict"; return arguments })(),
+  Object(1), Object(true), Object("bla"),
+  new Date(),
+  Object, Function, Date, RegExp,
+  new Set, new Map, new WeakMap,
+  new ArrayBuffer(10), new Int32Array(5),
+  createProxy(Proxy.create, null),
+  createProxy(Proxy.createFunction, function(){}),
+];
+var properties = ["a", "1", 1, "length", "prototype"];
+
+// Cases that yield non-standard results.
+// TODO(observe): ...or don't work yet.
+function blacklisted(obj, prop) {
+  return (obj instanceof Int32Array && prop == 1) ||
+    (obj instanceof Int32Array && prop === "length") ||
+    (obj instanceof ArrayBuffer && prop == 1) ||
+    // TODO(observe): oldValue when reconfiguring array length
+    (obj instanceof Array && prop === "length")
+}
+
+for (var i in objects) for (var j in properties) {
+  var obj = objects[i];
+  var prop = properties[j];
+  if (blacklisted(obj, prop)) continue;
+  var desc = Object.getOwnPropertyDescriptor(obj, prop);
+  print("***", typeof obj, stringifyNoThrow(obj), prop);
+  if (!desc || desc.configurable)
+    TestObserveConfigurable(obj, prop);
+  else if (desc.writable)
+    TestObserveNonConfigurable(obj, prop, desc);
+}
+
+
+// Observing array length (including truncation)
+reset();
+var arr = ['a', 'b', 'c', 'd'];
+var arr2 = ['alpha', 'beta'];
+var arr3 = ['hello'];
+arr3[2] = 'goodbye';
+arr3.length = 6;
+// TODO(adamk): Enable this test case when it can run in a reasonable
+// amount of time.
+//var slow_arr = new Array(1000000000);
+//slow_arr[500000000] = 'hello';
+Object.defineProperty(arr, '0', {configurable: false});
+Object.defineProperty(arr, '2', {get: function(){}});
+Object.defineProperty(arr2, '0', {get: function(){}, configurable: false});
+Object.observe(arr, observer.callback);
+Object.observe(arr2, observer.callback);
+Object.observe(arr3, observer.callback);
+arr.length = 2;
+arr.length = 0;
+arr.length = 10;
+arr2.length = 0;
+arr2.length = 1; // no change expected
+arr3.length = 0;
+Object.defineProperty(arr3, 'length', {value: 5});
+Object.defineProperty(arr3, 'length', {value: 10, writable: false});
+Object.deliverChangeRecords(observer.callback);
+observer.assertCallbackRecords([
+  { object: arr, name: '3', type: 'deleted', oldValue: 'd' },
+  { object: arr, name: '2', type: 'deleted' },
+  { object: arr, name: 'length', type: 'updated', oldValue: 4 },
+  { object: arr, name: '1', type: 'deleted', oldValue: 'b' },
+  { object: arr, name: 'length', type: 'updated', oldValue: 2 },
+  { object: arr, name: 'length', type: 'updated', oldValue: 1 },
+  { object: arr2, name: '1', type: 'deleted', oldValue: 'beta' },
+  { object: arr2, name: 'length', type: 'updated', oldValue: 2 },
+  { object: arr3, name: '2', type: 'deleted', oldValue: 'goodbye' },
+  { object: arr3, name: '0', type: 'deleted', oldValue: 'hello' },
+  { object: arr3, name: 'length', type: 'updated', oldValue: 6 },
+  { object: arr3, name: 'length', type: 'updated', oldValue: 0 },
+  { object: arr3, name: 'length', type: 'updated', oldValue: 5 },
+  // TODO(adamk): This record should be merged with the above
+  { object: arr3, name: 'length', type: 'reconfigured' },
+]);
+
+// Assignments in loops (checking different IC states).
+reset();
+var obj = {};
+Object.observe(obj, observer.callback);
+for (var i = 0; i < 5; i++) {
+  obj["a" + i] = i;
+}
+Object.deliverChangeRecords(observer.callback);
+observer.assertCallbackRecords([
+  { object: obj, name: "a0", type: "new" },
+  { object: obj, name: "a1", type: "new" },
+  { object: obj, name: "a2", type: "new" },
+  { object: obj, name: "a3", type: "new" },
+  { object: obj, name: "a4", type: "new" },
+]);
+
+reset();
+var obj = {};
+Object.observe(obj, observer.callback);
+for (var i = 0; i < 5; i++) {
+  obj[i] = i;
+}
+Object.deliverChangeRecords(observer.callback);
+observer.assertCallbackRecords([
+  { object: obj, name: "0", type: "new" },
+  { object: obj, name: "1", type: "new" },
+  { object: obj, name: "2", type: "new" },
+  { object: obj, name: "3", type: "new" },
+  { object: obj, name: "4", type: "new" },
+]);
+
+// Adding elements past the end of an array should notify on length
+reset();
+var arr = [1, 2, 3];
+Object.observe(arr, observer.callback);
+arr[3] = 10;
+arr[100] = 20;
+Object.defineProperty(arr, '200', {value: 7});
+Object.defineProperty(arr, '400', {get: function(){}});
+arr[50] = 30; // no length change expected
+Object.deliverChangeRecords(observer.callback);
+observer.assertCallbackRecords([
+  { object: arr, name: '3', type: 'new' },
+  { object: arr, name: 'length', type: 'updated', oldValue: 3 },
+  { object: arr, name: '100', type: 'new' },
+  { object: arr, name: 'length', type: 'updated', oldValue: 4 },
+  { object: arr, name: '200', type: 'new' },
+  { object: arr, name: 'length', type: 'updated', oldValue: 101 },
+  { object: arr, name: '400', type: 'new' },
+  { object: arr, name: 'length', type: 'updated', oldValue: 201 },
+  { object: arr, name: '50', type: 'new' },
+]);
+
+// Tests for array methods, first on arrays and then on plain objects
+//
+// === ARRAYS ===
+//
+// Push
+reset();
+var array = [1, 2];
+Object.observe(array, observer.callback);
+array.push(3, 4);
+Object.deliverChangeRecords(observer.callback);
+observer.assertCallbackRecords([
+  { object: array, name: '2', type: 'new' },
+  { object: array, name: 'length', type: 'updated', oldValue: 2 },
+  { object: array, name: '3', type: 'new' },
+  { object: array, name: 'length', type: 'updated', oldValue: 3 },
+]);
+
+// Pop
+reset();
+var array = [1, 2];
+Object.observe(array, observer.callback);
+array.pop();
+array.pop();
+Object.deliverChangeRecords(observer.callback);
+observer.assertCallbackRecords([
+  { object: array, name: '1', type: 'deleted', oldValue: 2 },
+  { object: array, name: 'length', type: 'updated', oldValue: 2 },
+  { object: array, name: '0', type: 'deleted', oldValue: 1 },
+  { object: array, name: 'length', type: 'updated', oldValue: 1 },
+]);
+
+// Shift
+reset();
+var array = [1, 2];
+Object.observe(array, observer.callback);
+array.shift();
+array.shift();
+Object.deliverChangeRecords(observer.callback);
+observer.assertCallbackRecords([
+  { object: array, name: '0', type: 'updated', oldValue: 1 },
+  { object: array, name: '1', type: 'deleted', oldValue: 2 },
+  { object: array, name: 'length', type: 'updated', oldValue: 2 },
+  { object: array, name: '0', type: 'deleted', oldValue: 2 },
+  { object: array, name: 'length', type: 'updated', oldValue: 1 },
+]);
+
+// Unshift
+reset();
+var array = [1, 2];
+Object.observe(array, observer.callback);
+array.unshift(3, 4);
+Object.deliverChangeRecords(observer.callback);
+observer.assertCallbackRecords([
+  { object: array, name: '3', type: 'new' },
+  { object: array, name: 'length', type: 'updated', oldValue: 2 },
+  { object: array, name: '2', type: 'new' },
+  { object: array, name: '0', type: 'updated', oldValue: 1 },
+  { object: array, name: '1', type: 'updated', oldValue: 2 },
+]);
+
+// Splice
+reset();
+var array = [1, 2, 3];
+Object.observe(array, observer.callback);
+array.splice(1, 1, 4, 5);
+Object.deliverChangeRecords(observer.callback);
+observer.assertCallbackRecords([
+  { object: array, name: '3', type: 'new' },
+  { object: array, name: 'length', type: 'updated', oldValue: 3 },
+  { object: array, name: '1', type: 'updated', oldValue: 2 },
+  { object: array, name: '2', type: 'updated', oldValue: 3 },
+]);
+
+//
+// === PLAIN OBJECTS ===
+//
+// Push
+reset()
+var array = {0: 1, 1: 2, length: 2}
+Object.observe(array, observer.callback);
+Array.prototype.push.call(array, 3, 4);
+Object.deliverChangeRecords(observer.callback);
+observer.assertCallbackRecords([
+  { object: array, name: '2', type: 'new' },
+  { object: array, name: '3', type: 'new' },
+  { object: array, name: 'length', type: 'updated', oldValue: 2 },
+]);
+
+// Pop
+reset()
+var array = {0: 1, 1: 2, length: 2};
+Object.observe(array, observer.callback);
+Array.prototype.pop.call(array);
+Array.prototype.pop.call(array);
+Object.deliverChangeRecords(observer.callback);
+observer.assertCallbackRecords([
+  { object: array, name: '1', type: 'deleted', oldValue: 2 },
+  { object: array, name: 'length', type: 'updated', oldValue: 2 },
+  { object: array, name: '0', type: 'deleted', oldValue: 1 },
+  { object: array, name: 'length', type: 'updated', oldValue: 1 },
+]);
+
+// Shift
+reset()
+var array = {0: 1, 1: 2, length: 2};
+Object.observe(array, observer.callback);
+Array.prototype.shift.call(array);
+Array.prototype.shift.call(array);
+Object.deliverChangeRecords(observer.callback);
+observer.assertCallbackRecords([
+  { object: array, name: '0', type: 'updated', oldValue: 1 },
+  { object: array, name: '1', type: 'deleted', oldValue: 2 },
+  { object: array, name: 'length', type: 'updated', oldValue: 2 },
+  { object: array, name: '0', type: 'deleted', oldValue: 2 },
+  { object: array, name: 'length', type: 'updated', oldValue: 1 },
+]);
+
+// Unshift
+reset()
+var array = {0: 1, 1: 2, length: 2};
+Object.observe(array, observer.callback);
+Array.prototype.unshift.call(array, 3, 4);
+Object.deliverChangeRecords(observer.callback);
+observer.assertCallbackRecords([
+  { object: array, name: '3', type: 'new' },
+  { object: array, name: '2', type: 'new' },
+  { object: array, name: '0', type: 'updated', oldValue: 1 },
+  { object: array, name: '1', type: 'updated', oldValue: 2 },
+  { object: array, name: 'length', type: 'updated', oldValue: 2 },
+]);
+
+// Splice
+reset()
+var array = {0: 1, 1: 2, 2: 3, length: 3};
+Object.observe(array, observer.callback);
+Array.prototype.splice.call(array, 1, 1, 4, 5);
+Object.deliverChangeRecords(observer.callback);
+observer.assertCallbackRecords([
+  { object: array, name: '3', type: 'new' },
+  { object: array, name: '1', type: 'updated', oldValue: 2 },
+  { object: array, name: '2', type: 'updated', oldValue: 3 },
+  { object: array, name: 'length', type: 'updated', oldValue: 3 },
+]);
+
+// Exercise StoreIC_ArrayLength
+reset();
+var dummy = {};
+Object.observe(dummy, observer.callback);
+Object.unobserve(dummy, observer.callback);
+var array = [0];
+Object.observe(array, observer.callback);
+array.splice(0, 1);
+Object.deliverChangeRecords(observer.callback);
+observer.assertCallbackRecords([
+  { object: array, name: '0', type: 'deleted', oldValue: 0 },
+  { object: array, name: 'length', type: 'updated', oldValue: 1},
+]);
+
+
+// __proto__
+reset();
+var obj = {};
+Object.observe(obj, observer.callback);
+var p = {foo: 'yes'};
+var q = {bar: 'no'};
+obj.__proto__ = p;
+obj.__proto__ = p;  // ignored
+obj.__proto__ = null;
+obj.__proto__ = q;
+// TODO(adamk): Add tests for objects with hidden prototypes
+// once we support observing the global object.
+Object.deliverChangeRecords(observer.callback);
+observer.assertCallbackRecords([
+  { object: obj, name: '__proto__', type: 'prototype',
+    oldValue: Object.prototype },
+  { object: obj, name: '__proto__', type: 'prototype', oldValue: p },
+  { object: obj, name: '__proto__', type: 'prototype', oldValue: null },
+]);
+
+// Function.prototype
+reset();
+var fun = function(){};
+Object.observe(fun, observer.callback);
+var myproto = {foo: 'bar'};
+fun.prototype = myproto;
+fun.prototype = 7;
+fun.prototype = 7;  // ignored
+Object.defineProperty(fun, 'prototype', {value: 8});
+Object.deliverChangeRecords(observer.callback);
+observer.assertRecordCount(3);
+// Manually examine the first record in order to test
+// lazy creation of oldValue
+assertSame(fun, observer.records[0].object);
+assertEquals('prototype', observer.records[0].name);
+assertEquals('updated', observer.records[0].type);
+// The only existing reference to the oldValue object is in this
+// record, so to test that lazy creation happened correctly
+// we compare its constructor to our function (one of the invariants
+// ensured when creating an object via AllocateFunctionPrototype).
+assertSame(fun, observer.records[0].oldValue.constructor);
+observer.records.splice(0, 1);
+observer.assertCallbackRecords([
+  { object: fun, name: 'prototype', type: 'updated', oldValue: myproto },
+  { object: fun, name: 'prototype', type: 'updated', oldValue: 7 },
+]);
+
+// Function.prototype should not be observable except on the object itself
+reset();
+var fun = function(){};
+var obj = { __proto__: fun };
+Object.observe(obj, observer.callback);
+obj.prototype = 7;
+Object.deliverChangeRecords(observer.callback);
+observer.assertNotCalled();
diff --git a/deps/v8/test/mjsunit/harmony/proxies-json.js b/deps/v8/test/mjsunit/harmony/proxies-json.js
new file mode 100644
index 0000000000..539c5a84cb
--- /dev/null
+++ b/deps/v8/test/mjsunit/harmony/proxies-json.js
@@ -0,0 +1,178 @@
+// Copyright 2012 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Flags: --harmony
+
+function testStringify(expected, object) {
+  // Test fast case that bails out to slow case.
+  assertEquals(expected, JSON.stringify(object));
+  // Test slow case.
+  assertEquals(expected, JSON.stringify(object, undefined, 0));
+}
+
+// Test serializing a proxy, function proxy and objects that contain them.
+var handler1 = {
+  get: function(target, name) {
+    return name.toUpperCase();
+  },
+  enumerate: function(target) {
+    return ['a', 'b', 'c'];
+  },
+  getOwnPropertyDescriptor: function(target, name) {
+    return { enumerable: true };
+  }
+}
+
+var proxy1 = Proxy.create(handler1);
+testStringify('{"a":"A","b":"B","c":"C"}', proxy1);
+
+var proxy_fun = Proxy.createFunction(handler1, function() { return 1; });
+testStringify(undefined, proxy_fun);
+testStringify('[1,null]', [1, proxy_fun]);
+
+var parent1a = { b: proxy1 };
+testStringify('{"b":{"a":"A","b":"B","c":"C"}}', parent1a);
+
+var parent1b = { a: 123, b: proxy1, c: true };
+testStringify('{"a":123,"b":{"a":"A","b":"B","c":"C"},"c":true}', parent1b);
+
+var parent1c = [123, proxy1, true];
+testStringify('[123,{"a":"A","b":"B","c":"C"},true]', parent1c);
+
+// Proxy with side effect.
+var handler2 = {
+  get: function(target, name) {
+    delete parent2.c;
+    return name.toUpperCase();
+  },
+  enumerate: function(target) {
+    return ['a', 'b', 'c'];
+  },
+  getOwnPropertyDescriptor: function(target, name) {
+    return { enumerable: true };
+  }
+}
+
+var proxy2 = Proxy.create(handler2);
+var parent2 = { a: "delete", b: proxy2, c: "remove" };
+var expected2 = '{"a":"delete","b":{"a":"A","b":"B","c":"C"}}';
+assertEquals(expected2, JSON.stringify(parent2));
+parent2.c = "remove";  // Revert side effect.
+assertEquals(expected2, JSON.stringify(parent2, undefined, 0));
+
+// Proxy with a get function that uses the first argument.
+var handler3 = {
+  get: function(target, name) {
+    if (name == 'valueOf') return function() { return "proxy" };
+    return name + "(" + target + ")";
+  },
+  enumerate: function(target) {
+    return ['a', 'b', 'c'];
+  },
+  getOwnPropertyDescriptor: function(target, name) {
+    return { enumerable: true };
+  }
+}
+
+var proxy3 = Proxy.create(handler3);
+var parent3 = { x: 123, y: proxy3 }
+testStringify('{"x":123,"y":{"a":"a(proxy)","b":"b(proxy)","c":"c(proxy)"}}',
+              parent3);
+
+// Empty proxy.
+var handler4 = {
+  get: function(target, name) {
+    return 0;
+  },
+  enumerate: function(target) {
+    return [];
+  },
+  getOwnPropertyDescriptor: function(target, name) {
+    return { enumerable: false };
+  }
+}
+
+var proxy4 = Proxy.create(handler4);
+testStringify('{}', proxy4);
+testStringify('{"a":{}}', { a: proxy4 });
+
+// Proxy that provides a toJSON function that uses this.
+var handler5 = {
+  get: function(target, name) {
+    if (name == 'z') return 97000;
+    return function(key) { return key.charCodeAt(0) + this.z; };
+  },
+  enumerate: function(target) {
+    return ['toJSON', 'z'];
+  },
+  getOwnPropertyDescriptor: function(target, name) {
+    return { enumerable: true };
+  }
+}
+
+var proxy5 = Proxy.create(handler5);
+testStringify('{"a":97097}', { a: proxy5 });
+
+// Proxy that provides a toJSON function that returns undefined.
+var handler6 = {
+  get: function(target, name) {
+    return function(key) { return undefined; };
+  },
+  enumerate: function(target) {
+    return ['toJSON'];
+  },
+  getOwnPropertyDescriptor: function(target, name) {
+    return { enumerable: true };
+  }
+}
+
+var proxy6 = Proxy.create(handler6);
+testStringify('[1,null,true]', [1, proxy6, true]);
+testStringify('{"a":1,"c":true}', {a: 1, b: proxy6, c: true});
+
+// Object containing a proxy that changes the parent's properties.
+var handler7 = {
+  get: function(target, name) {
+    delete parent7.a;
+    delete parent7.c;
+    parent7.e = "5";
+    return name.toUpperCase();
+  },
+  enumerate: function(target) {
+    return ['a', 'b', 'c'];
+  },
+  getOwnPropertyDescriptor: function(target, name) {
+    return { enumerable: true };
+  }
+}
+
+var proxy7 = Proxy.create(handler7);
+var parent7 = { a: "1", b: proxy7, c: "3", d: "4" };
+assertEquals('{"a":"1","b":{"a":"A","b":"B","c":"C"},"d":"4"}',
+             JSON.stringify(parent7));
+assertEquals('{"b":{"a":"A","b":"B","c":"C"},"d":"4","e":"5"}',
+             JSON.stringify(parent7));
diff --git a/deps/v8/test/mjsunit/harmony/proxies.js b/deps/v8/test/mjsunit/harmony/proxies.js
index 7170ffd9c7..04fc76949e 100644
--- a/deps/v8/test/mjsunit/harmony/proxies.js
+++ b/deps/v8/test/mjsunit/harmony/proxies.js
@@ -649,6 +649,11 @@ function TestSetForDerived2(create, trap) {
 
 TestSetForDerived(
   function(k) {
+    // TODO(yangguo): issue 2398 - throwing an error causes formatting of
+    // the message string, which can be observable through this handler.
+    // We ignore keys that occur when formatting the message string.
+    if (k == "toString" || k == "valueOf") return;
+
     key = k;
     switch (k) {
       case "p_writable": return {writable: true, configurable: true}
diff --git a/deps/v8/test/mjsunit/json-parser-recursive.js b/deps/v8/test/mjsunit/json-parser-recursive.js
new file mode 100644
index 0000000000..1e00c83c87
--- /dev/null
+++ b/deps/v8/test/mjsunit/json-parser-recursive.js
@@ -0,0 +1,33 @@
+// Copyright 2012 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+var str = "[1]";
+for (var i = 0; i < 100000; i++) {
+  str = "[1," + str + "]";
+}
+
+assertThrows(function() { JSON.parse(str); }, RangeError);
diff --git a/deps/v8/test/mjsunit/json-stringify-recursive.js b/deps/v8/test/mjsunit/json-stringify-recursive.js
new file mode 100644
index 0000000000..31aa0027c5
--- /dev/null
+++ b/deps/v8/test/mjsunit/json-stringify-recursive.js
@@ -0,0 +1,52 @@
+// Copyright 2012 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+var a = {};
+for (i = 0; i < 10000; i++) {
+  var current = {};
+  current.a = a;
+  a = current;
+}
+
+function rec(a,b,c,d,e,f,g,h,i,j,k,l,m,n) {
+  JSON.stringify(a);
+  rec(a,b,c,d,e,f,g,h,i,j,k,l,m,n);
+}
+
+assertThrows(function() { rec(1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1, 2, 3, 4) },
+             RangeError);
+
+
+var depth = 10000;
+var deepArray = [];
+for (var i = 0; i < depth; i++) deepArray = [deepArray];
+assertThrows(function() { JSON.stringify(deepArray); }, RangeError);
+
+
+var deepObject = {};
+for (var i = 0; i < depth; i++) deepObject = { next: deepObject };
+assertThrows(function() { JSON.stringify(deepObject); }, RangeError);
diff --git a/deps/v8/test/mjsunit/json.js b/deps/v8/test/mjsunit/json.js
index bead376f84..6e91725c7d 100644
--- a/deps/v8/test/mjsunit/json.js
+++ b/deps/v8/test/mjsunit/json.js
@@ -257,6 +257,42 @@ assertEquals("[1,2,[3,[4],5],6,7]",
 assertEquals("[2,4,[6,[8],10],12,14]",
              JSON.stringify([1, 2, [3, [4], 5], 6, 7], DoubleNumbers));
 assertEquals('["a","ab","abc"]', JSON.stringify(["a","ab","abc"]));
+assertEquals('{"a":1,"c":true}',
+              JSON.stringify({ a : 1,
+                               b : function() { 1 },
+                               c : true,
+                               d : function() { 2 } }));
+assertEquals('[1,null,true,null]',
+             JSON.stringify([1, function() { 1 }, true, function() { 2 }]));
+assertEquals('"toJSON 123"',
+             JSON.stringify({ toJSON : function() { return 'toJSON 123'; } }));
+assertEquals('{"a":321}',
+             JSON.stringify({ a : { toJSON : function() { return 321; } } }));
+var counter = 0;
+assertEquals('{"getter":123}',
+             JSON.stringify({ get getter() { counter++; return 123; } }));
+assertEquals(1, counter);
+assertEquals('{"a":"abc","b":"\u1234bc"}',
+             JSON.stringify({ a : "abc", b : "\u1234bc" }));
+
+
+var a = { a : 1, b : 2 };
+delete a.a;
+assertEquals('{"b":2}', JSON.stringify(a));
+
+var b = {};
+b.__proto__ = { toJSON : function() { return 321;} };
+assertEquals("321", JSON.stringify(b));
+
+var array = [""];
+var expected = '""';
+for (var i = 0; i < 10000; i++) {
+  array.push("");
+  expected = '"",' + expected;
+}
+expected = '[' + expected + ']';
+assertEquals(expected, JSON.stringify(array));
+
 
 var circular = [1, 2, 3];
 circular[2] = circular;
@@ -428,5 +464,5 @@ var o = JSON.parse('{"__proto__":5}');
 assertEquals(Object.prototype, o.__proto__);  // __proto__ isn't changed.
 assertEquals(0, Object.keys(o).length);  // __proto__ isn't added as enumerable.
 
-
-
+var json = '{"stuff before slash\\\\stuff after slash":"whatever"}';
+assertEquals(json, JSON.stringify(JSON.parse(json)));
diff --git a/deps/v8/test/mjsunit/json2.js b/deps/v8/test/mjsunit/json2.js
new file mode 100644
index 0000000000..4c0b8f58c8
--- /dev/null
+++ b/deps/v8/test/mjsunit/json2.js
@@ -0,0 +1,153 @@
+// Copyright 2012 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Flags: --allow-natives-syntax
+
+// Test JSON.stringify on the global object.
+var a = 12345;
+assertTrue(JSON.stringify(this).indexOf('"a":12345') > 0);
+
+// Test JSON.stringify of array in dictionary mode.
+var array_1 = [];
+var array_2 = [];
+array_1[100000] = 1;
+array_2[100000] = function() { return 1; };
+var nulls = "";
+for (var i = 0; i < 100000; i++) {
+  nulls += 'null,';
+}
+expected_1 = '[' + nulls + '1]';
+expected_2 = '[' + nulls + 'null]';
+assertEquals(expected_1, JSON.stringify(array_1));
+assertEquals(expected_2, JSON.stringify(array_2));
+
+// Test JSValue with custom prototype.
+var num_wrapper = Object(42);
+num_wrapper.__proto__ = { __proto__: null,
+                          toString: function() { return true; } };
+assertEquals('1', JSON.stringify(num_wrapper));
+
+var str_wrapper = Object('2');
+str_wrapper.__proto__ = { __proto__: null,
+                          toString: function() { return true; } };
+assertEquals('"true"', JSON.stringify(str_wrapper));
+
+var bool_wrapper = Object(false);
+bool_wrapper.__proto__ = { __proto__: null,
+                           toString: function() { return true; } };
+// Note that toString function is not evaluated here!
+assertEquals('false', JSON.stringify(bool_wrapper));
+
+// Test getters.
+var counter = 0;
+var getter_obj = { get getter() {
+                         counter++;
+                         return 123;
+                       } };
+assertEquals('{"getter":123}', JSON.stringify(getter_obj));
+assertEquals(1, counter);
+
+// Test toJSON function.
+var tojson_obj = { toJSON: function() {
+                             counter++;
+                             return [1, 2];
+                           },
+                   a: 1};
+assertEquals('[1,2]', JSON.stringify(tojson_obj));
+assertEquals(2, counter);
+
+// Test that we don't recursively look for the toJSON function.
+var tojson_proto_obj = { a: 'fail' };
+tojson_proto_obj.__proto__ = { toJSON: function() {
+                                         counter++;
+                                         return tojson_obj;
+                                       } };
+assertEquals('{"a":1}', JSON.stringify(tojson_proto_obj));
+
+// Test toJSON produced by a getter.
+var tojson_via_getter = { get toJSON() {
+                                return function(x) {
+                                         counter++;
+                                         return 321;
+                                       };
+                              },
+                          a: 1 };
+assertEquals('321', JSON.stringify(tojson_via_getter));
+
+// Test toJSON with key.
+tojson_obj = { toJSON: function(key) { return key + key; } };
+var tojson_with_key_1 = { a: tojson_obj, b: tojson_obj };
+assertEquals('{"a":"aa","b":"bb"}', JSON.stringify(tojson_with_key_1));
+var tojson_with_key_2 = [ tojson_obj, tojson_obj ];
+assertEquals('["00","11"]', JSON.stringify(tojson_with_key_2));
+
+// Test toJSON with exception.
+var tojson_ex = { toJSON: function(key) { throw "123" } };
+assertThrows(function() { JSON.stringify(tojson_ex); });
+
+// Test toJSON with access to this.
+var obj = { toJSON: function(key) { return this.a + key; }, a: "x" };
+assertEquals('{"y":"xy"}', JSON.stringify({y: obj}));
+
+// Test holes in arrays.
+var fast_smi = [1, 2, 3, 4];
+fast_smi.__proto__ = [7, 7, 7, 7];
+delete fast_smi[2];
+assertTrue(%HasFastSmiElements(fast_smi));
+assertEquals("[1,2,7,4]", JSON.stringify(fast_smi));
+
+var fast_double = [1.1, 2, 3, 4];
+fast_double.__proto__ = [7, 7, 7, 7];
+
+delete fast_double[2];
+assertTrue(%HasFastDoubleElements(fast_double));
+assertEquals("[1.1,2,7,4]", JSON.stringify(fast_double));
+
+var fast_obj = [1, 2, {}, {}];
+fast_obj.__proto__ = [7, 7, 7, 7];
+
+delete fast_obj[2];
+assertTrue(%HasFastObjectElements(fast_obj));
+assertEquals("[1,2,7,{}]", JSON.stringify(fast_obj));
+
+var getter_side_effect = { a: 1,
+                           get b() {
+                             delete this.a;
+                             delete this.c;
+                             this.e = 5;
+                             return 2;
+                           },
+                           c: 3,
+                           d: 4 };
+assertEquals('{"a":1,"b":2,"d":4}', JSON.stringify(getter_side_effect));
+assertEquals('{"b":2,"d":4,"e":5}', JSON.stringify(getter_side_effect));
+
+var non_enum = {};
+non_enum.a = 1;
+Object.defineProperty(non_enum, "b", { value: 2, enumerable: false });
+non_enum.c = 3;
+assertEquals('{"a":1,"c":3}', JSON.stringify(non_enum));
diff --git a/deps/v8/test/mjsunit/limit-locals.js b/deps/v8/test/mjsunit/limit-locals.js
index 22f895c714..a166f30617 100644
--- a/deps/v8/test/mjsunit/limit-locals.js
+++ b/deps/v8/test/mjsunit/limit-locals.js
@@ -25,7 +25,9 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-// Test that there is a limit of 65535 locals.
+// Test that there is a limit of 131071 locals.
+
+// Flags: --stack-size=1200
 
 function function_with_n_locals(n) {
   test_prefix = "prefix ";
@@ -40,8 +42,6 @@ function function_with_n_locals(n) {
 
 assertEquals("prefix 0 suffix", function_with_n_locals(0));
 assertEquals("prefix 16000 suffix", function_with_n_locals(16000));
-assertEquals("prefix 32767 suffix", function_with_n_locals(32767));
-assertEquals("prefix 65535 suffix", function_with_n_locals(65535));
+assertEquals("prefix 131071 suffix", function_with_n_locals(131071));
 
-assertThrows("function_with_n_locals(65536)");
-assertThrows("function_with_n_locals(100000)");
+assertThrows("function_with_n_locals(131072)");
diff --git a/deps/v8/test/mjsunit/manual-parallel-recompile.js b/deps/v8/test/mjsunit/manual-parallel-recompile.js
new file mode 100644
index 0000000000..26b160537b
--- /dev/null
+++ b/deps/v8/test/mjsunit/manual-parallel-recompile.js
@@ -0,0 +1,79 @@
+// Copyright 2012 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Flags: --allow-natives-syntax --expose-gc
+// Flags: --parallel-recompilation --manual-parallel-recompilation
+
+function assertOptimized(fun) {
+  // This assertion takes --always-opt and --nocrankshaft flags into account.
+  assertTrue(%GetOptimizationStatus(fun) != 2);
+}
+
+function assertUnoptimized(fun) {
+  assertTrue(%GetOptimizationStatus(fun) != 1);
+}
+
+function f(x) {
+  var xx = x * x;
+  var xxstr = xx.toString();
+  return xxstr.length;
+}
+
+function g(x) {
+  var xxx = Math.sqrt(x) | 0;
+  var xxxstr = xxx.toString();
+  return xxxstr.length;
+}
+
+function k(x) {
+  return x * x;
+}
+
+f(g(1));
+f(g(2));
+assertUnoptimized(f);
+assertUnoptimized(g);
+
+%ForceParallelRecompile(f);
+%ForceParallelRecompile(g);
+assertUnoptimized(f);
+assertUnoptimized(g);
+
+var sum = 0;
+for (var i = 0; i < 10000; i++) sum += f(i) + g(i);
+gc();
+
+assertEquals(95274, sum);
+assertUnoptimized(f);
+assertUnoptimized(g);
+
+%InstallRecompiledCode(f);
+assertOptimized(f);
+assertUnoptimized(g);
+
+%InstallRecompiledCode(g);
+assertOptimized(g);
diff --git a/deps/v8/test/mjsunit/math-exp-precision.js b/deps/v8/test/mjsunit/math-exp-precision.js
new file mode 100644
index 0000000000..ace7edc58c
--- /dev/null
+++ b/deps/v8/test/mjsunit/math-exp-precision.js
@@ -0,0 +1,64 @@
+// Copyright 2012 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Tests that the --fast-math implementation of Math.exp() has
+// reasonable precision.
+
+function exp(x) {
+  return Math.exp(x);
+}
+
+var first_call_result = exp(Math.PI);
+var second_call_result = exp(Math.PI);
+
+function assertAlmostEquals(expected, actual, x) {
+  if (expected == 0 && actual == 0) return;  // OK
+  if (expected == Number.POSITIVE_INFINITY &&
+      actual == Number.POSITIVE_INFINITY) {
+    return;  // OK
+  }
+  relative_diff = Math.abs(expected/actual - 1);
+  assertTrue(relative_diff < 1e-12, "relative difference of " + relative_diff +
+                                    " for input " + x);
+}
+
+var increment = Math.PI / 35;  // Roughly 0.1, but we want to try many
+                               // different mantissae.
+for (var x = -708; x < 710; x += increment) {
+  var ex = exp(x);
+  var reference = Math.pow(Math.E, x);
+  assertAlmostEquals(reference, ex, x);
+  if (ex > 0 && isFinite(ex)) {
+    var back = Math.log(ex);
+    assertAlmostEquals(x, back, x + " (backwards)");
+  }
+}
+
+// Make sure optimizing the function does not alter the result.
+var last_call_result = exp(Math.PI);
+assertEquals(first_call_result, second_call_result);
+assertEquals(first_call_result, last_call_result);
diff --git a/deps/v8/test/mjsunit/math-floor-of-div-minus-zero.js b/deps/v8/test/mjsunit/math-floor-of-div-minus-zero.js
index 2743490847..7349165854 100644
--- a/deps/v8/test/mjsunit/math-floor-of-div-minus-zero.js
+++ b/deps/v8/test/mjsunit/math-floor-of-div-minus-zero.js
@@ -35,6 +35,7 @@ function test_div_no_deopt_minus_zero() {
 }
 
 test_div_no_deopt_minus_zero();
+test_div_no_deopt_minus_zero();
 %OptimizeFunctionOnNextCall(test_div_no_deopt_minus_zero);
 test_div_no_deopt_minus_zero();
 assertTrue(2 != %GetOptimizationStatus(test_div_no_deopt_minus_zero));
diff --git a/deps/v8/test/mjsunit/math-floor.js b/deps/v8/test/mjsunit/math-floor-part1.js
index f211ce2e56..313f27236a 100644
--- a/deps/v8/test/mjsunit/math-floor.js
+++ b/deps/v8/test/mjsunit/math-floor-part1.js
@@ -45,13 +45,6 @@ function zero() {
 }
 
 function test() {
-  testFloor(0, 0);
-  testFloor(0, zero());
-  testFloor(-0, -0);
-  testFloor(Infinity, Infinity);
-  testFloor(-Infinity, -Infinity);
-  testFloor(NaN, NaN);
-
   // Ensure that a negative zero coming from Math.floor is properly handled
   // by other operations.
   function ifloor(x) {
@@ -86,74 +79,10 @@ function test() {
   testFloor(-Number.MAX_VALUE, -Number.MAX_VALUE);
   testFloor(Infinity, Infinity);
   testFloor(-Infinity, -Infinity);
-
-  // 2^30 is a smi boundary.
-  var two_30 = 1 << 30;
-
-  testFloor(two_30, two_30);
-  testFloor(two_30, two_30 + 0.1);
-  testFloor(two_30, two_30 + 0.5);
-  testFloor(two_30, two_30 + 0.7);
-
-  testFloor(two_30 - 1, two_30 - 1);
-  testFloor(two_30 - 1, two_30 - 1 + 0.1);
-  testFloor(two_30 - 1, two_30 - 1 + 0.5);
-  testFloor(two_30 - 1, two_30 - 1 + 0.7);
-
-  testFloor(-two_30, -two_30);
-  testFloor(-two_30, -two_30 + 0.1);
-  testFloor(-two_30, -two_30 + 0.5);
-  testFloor(-two_30, -two_30 + 0.7);
-
-  testFloor(-two_30 + 1, -two_30 + 1);
-  testFloor(-two_30 + 1, -two_30 + 1 + 0.1);
-  testFloor(-two_30 + 1, -two_30 + 1 + 0.5);
-  testFloor(-two_30 + 1, -two_30 + 1 + 0.7);
-
-  // 2^52 is a precision boundary.
-  var two_52 = (1 << 30) * (1 << 22);
-
-  testFloor(two_52, two_52);
-  testFloor(two_52, two_52 + 0.1);
-  assertEquals(two_52, two_52 + 0.5);
-  testFloor(two_52, two_52 + 0.5);
-  assertEquals(two_52 + 1, two_52 + 0.7);
-  testFloor(two_52 + 1, two_52 + 0.7);
-
-  testFloor(two_52 - 1, two_52 - 1);
-  testFloor(two_52 - 1, two_52 - 1 + 0.1);
-  testFloor(two_52 - 1, two_52 - 1 + 0.5);
-  testFloor(two_52 - 1, two_52 - 1 + 0.7);
-
-  testFloor(-two_52, -two_52);
-  testFloor(-two_52, -two_52 + 0.1);
-  testFloor(-two_52, -two_52 + 0.5);
-  testFloor(-two_52, -two_52 + 0.7);
-
-  testFloor(-two_52 + 1, -two_52 + 1);
-  testFloor(-two_52 + 1, -two_52 + 1 + 0.1);
-  testFloor(-two_52 + 1, -two_52 + 1 + 0.5);
-  testFloor(-two_52 + 1, -two_52 + 1 + 0.7);
 }
 
 
 // Test in a loop to cover the custom IC and GC-related issues.
-for (var i = 0; i < 500; i++) {
+for (var i = 0; i < 100; i++) {
   test();
 }
-
-
-// Regression test for a bug where a negative zero coming from Math.floor
-// was not properly handled by other operations.
-function floorsum(i, n) {
-  var ret = Math.floor(n);
-  while (--i > 0) {
-    ret += Math.floor(n);
-  }
-  return ret;
-}
-assertEquals(-0, floorsum(1, -0));
-%OptimizeFunctionOnNextCall(floorsum);
-// The optimized function will deopt.  Run it with enough iterations to try
-// to optimize via OSR (triggering the bug).
-assertEquals(-0, floorsum(100000, -0));
diff --git a/deps/v8/test/mjsunit/math-floor-part2.js b/deps/v8/test/mjsunit/math-floor-part2.js
new file mode 100644
index 0000000000..b6d51b2bde
--- /dev/null
+++ b/deps/v8/test/mjsunit/math-floor-part2.js
@@ -0,0 +1,76 @@
+// Copyright 2011 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Flags: --max-new-space-size=256 --allow-natives-syntax
+
+var test_id = 0;
+
+function testFloor(expect, input) {
+  var test = new Function('n',
+                          '"' + (test_id++) + '";return Math.floor(n)');
+  assertEquals(expect, test(input));
+  assertEquals(expect, test(input));
+  assertEquals(expect, test(input));
+  %OptimizeFunctionOnNextCall(test);
+  assertEquals(expect, test(input));
+}
+
+function zero() {
+  var x = 0.5;
+  return (function() { return x - 0.5; })();
+}
+
+function test() {
+  // 2^30 is a smi boundary.
+  var two_30 = 1 << 30;
+
+  testFloor(two_30, two_30);
+  testFloor(two_30, two_30 + 0.1);
+  testFloor(two_30, two_30 + 0.5);
+  testFloor(two_30, two_30 + 0.7);
+
+  testFloor(two_30 - 1, two_30 - 1);
+  testFloor(two_30 - 1, two_30 - 1 + 0.1);
+  testFloor(two_30 - 1, two_30 - 1 + 0.5);
+  testFloor(two_30 - 1, two_30 - 1 + 0.7);
+
+  testFloor(-two_30, -two_30);
+  testFloor(-two_30, -two_30 + 0.1);
+  testFloor(-two_30, -two_30 + 0.5);
+  testFloor(-two_30, -two_30 + 0.7);
+
+  testFloor(-two_30 + 1, -two_30 + 1);
+  testFloor(-two_30 + 1, -two_30 + 1 + 0.1);
+  testFloor(-two_30 + 1, -two_30 + 1 + 0.5);
+  testFloor(-two_30 + 1, -two_30 + 1 + 0.7);
+}
+
+
+// Test in a loop to cover the custom IC and GC-related issues.
+for (var i = 0; i < 100; i++) {
+  test();
+}
diff --git a/deps/v8/test/mjsunit/math-floor-part3.js b/deps/v8/test/mjsunit/math-floor-part3.js
new file mode 100644
index 0000000000..db25923433
--- /dev/null
+++ b/deps/v8/test/mjsunit/math-floor-part3.js
@@ -0,0 +1,78 @@
+// Copyright 2011 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Flags: --max-new-space-size=256 --allow-natives-syntax
+
+var test_id = 0;
+
+function testFloor(expect, input) {
+  var test = new Function('n',
+                          '"' + (test_id++) + '";return Math.floor(n)');
+  assertEquals(expect, test(input));
+  assertEquals(expect, test(input));
+  assertEquals(expect, test(input));
+  %OptimizeFunctionOnNextCall(test);
+  assertEquals(expect, test(input));
+}
+
+function zero() {
+  var x = 0.5;
+  return (function() { return x - 0.5; })();
+}
+
+function test() {
+  // 2^52 is a precision boundary.
+  var two_52 = (1 << 30) * (1 << 22);
+
+  testFloor(two_52, two_52);
+  testFloor(two_52, two_52 + 0.1);
+  assertEquals(two_52, two_52 + 0.5);
+  testFloor(two_52, two_52 + 0.5);
+  assertEquals(two_52 + 1, two_52 + 0.7);
+  testFloor(two_52 + 1, two_52 + 0.7);
+
+  testFloor(two_52 - 1, two_52 - 1);
+  testFloor(two_52 - 1, two_52 - 1 + 0.1);
+  testFloor(two_52 - 1, two_52 - 1 + 0.5);
+  testFloor(two_52 - 1, two_52 - 1 + 0.7);
+
+  testFloor(-two_52, -two_52);
+  testFloor(-two_52, -two_52 + 0.1);
+  testFloor(-two_52, -two_52 + 0.5);
+  testFloor(-two_52, -two_52 + 0.7);
+
+  testFloor(-two_52 + 1, -two_52 + 1);
+  testFloor(-two_52 + 1, -two_52 + 1 + 0.1);
+  testFloor(-two_52 + 1, -two_52 + 1 + 0.5);
+  testFloor(-two_52 + 1, -two_52 + 1 + 0.7);
+}
+
+
+// Test in a loop to cover the custom IC and GC-related issues.
+for (var i = 0; i < 100; i++) {
+  test();
+}
diff --git a/deps/v8/test/mjsunit/math-floor-part4.js b/deps/v8/test/mjsunit/math-floor-part4.js
new file mode 100644
index 0000000000..c633623083
--- /dev/null
+++ b/deps/v8/test/mjsunit/math-floor-part4.js
@@ -0,0 +1,76 @@
+// Copyright 2011 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Flags: --max-new-space-size=256 --allow-natives-syntax
+
+var test_id = 0;
+
+function testFloor(expect, input) {
+  var test = new Function('n',
+                          '"' + (test_id++) + '";return Math.floor(n)');
+  assertEquals(expect, test(input));
+  assertEquals(expect, test(input));
+  assertEquals(expect, test(input));
+  %OptimizeFunctionOnNextCall(test);
+  assertEquals(expect, test(input));
+}
+
+function zero() {
+  var x = 0.5;
+  return (function() { return x - 0.5; })();
+}
+
+function test() {
+  testFloor(0, 0);
+  testFloor(0, zero());
+  testFloor(-0, -0);
+  testFloor(Infinity, Infinity);
+  testFloor(-Infinity, -Infinity);
+  testFloor(NaN, NaN);
+}
+
+
+// Test in a loop to cover the custom IC and GC-related issues.
+for (var i = 0; i < 100; i++) {
+  test();
+}
+
+
+// Regression test for a bug where a negative zero coming from Math.floor
+// was not properly handled by other operations.
+function floorsum(i, n) {
+  var ret = Math.floor(n);
+  while (--i > 0) {
+    ret += Math.floor(n);
+  }
+  return ret;
+}
+assertEquals(-0, floorsum(1, -0));
+%OptimizeFunctionOnNextCall(floorsum);
+// The optimized function will deopt.  Run it with enough iterations to try
+// to optimize via OSR (triggering the bug).
+assertEquals(-0, floorsum(100000, -0));
diff --git a/deps/v8/test/mjsunit/mjsunit.status b/deps/v8/test/mjsunit/mjsunit.status
index 357b33bf08..0bf378b476 100644
--- a/deps/v8/test/mjsunit/mjsunit.status
+++ b/deps/v8/test/mjsunit/mjsunit.status
@@ -44,12 +44,13 @@ regress/regress-524: SKIP
 # Too slow in debug mode with --stress-opt
 compiler/regress-stacktrace-methods: PASS, SKIP if $mode == debug
 compiler/regress-funcaller: PASS, SKIP if $mode == debug
+regress/regress-2318: PASS, SKIP if $mode == debug
 regress/regress-create-exception: PASS, SKIP if $mode == debug
 
 ##############################################################################
-# This one uses a built-in that's only present in debug mode. It takes
+# These use a built-in that's only present in debug mode. They take
 # too long to run in debug mode on ARM and MIPS.
-fuzz-natives: PASS, SKIP if ($mode == release || $arch == arm || $arch == android_arm || $arch == mipsel)
+fuzz-natives-part*: PASS, SKIP if ($mode == release || $arch == arm || $arch == android_arm || $arch == mipsel)
 
 big-object-literal: PASS, SKIP if ($arch == arm || $arch == android_arm)
 
@@ -59,8 +60,14 @@ array-constructor: PASS || TIMEOUT
 # Very slow on ARM and MIPS, contains no architecture dependent code.
 unicode-case-overoptimization: PASS, TIMEOUT if ($arch == arm || $arch == android_arm || $arch == mipsel)
 
-# Test Crankshaft compilation time.  Expected to take too long in debug mode.
-regress/regress-1969: PASS, SKIP if ($mode == debug || $arch == android_arm)
+##############################################################################
+# This test expects to reach a certain recursion depth, which may not work
+# for debug mode.
+json-recursive: PASS, (PASS || FAIL) if $mode == debug
+
+##############################################################################
+# Skip long running test that times out in debug mode.
+regress/regress-crbug-160010: PASS, SKIP if $mode == debug
 
 ##############################################################################
 # This test sets the umask on a per-process basis and hence cannot be
@@ -76,6 +83,7 @@ tools/tickprocessor: PASS, SKIP if ($arch == android_arm || $arch == android_ia3
 try: PASS, SKIP if $mode == debug
 debug-scripts-request: PASS, SKIP if $mode == debug
 array-constructor: PASS, SKIP if $mode == debug
+regress/regress-1122: PASS, SKIP if ($mode == debug && $arch == android_arm)
 
 # Flaky test that can hit compilation-time stack overflow in debug mode.
 unicode-test: PASS, (PASS || FAIL) if $mode == debug
@@ -103,11 +111,9 @@ compiler/property-calls: SKIP
 compiler/recursive-deopt: SKIP
 compiler/regress-4: SKIP
 compiler/regress-funcaller: SKIP
-compiler/regress-gvn: SKIP
 compiler/regress-rep-change: SKIP
 compiler/regress-arguments: SKIP
 compiler/regress-funarguments: SKIP
-compiler/regress-or: SKIP
 compiler/regress-3249650: SKIP
 compiler/simple-deopt: SKIP
 regress/regress-490: SKIP
@@ -161,11 +167,9 @@ compiler/property-calls: SKIP
 compiler/recursive-deopt: SKIP
 compiler/regress-4: SKIP
 compiler/regress-funcaller: SKIP
-compiler/regress-gvn: SKIP
 compiler/regress-rep-change: SKIP
 compiler/regress-arguments: SKIP
 compiler/regress-funarguments: SKIP
-compiler/regress-or: SKIP
 compiler/regress-3249650: SKIP
 compiler/simple-deopt: SKIP
 regress/regress-490: SKIP
diff --git a/deps/v8/test/mjsunit/mul-exhaustive-part1.js b/deps/v8/test/mjsunit/mul-exhaustive-part1.js
new file mode 100644
index 0000000000..7902cc2e67
--- /dev/null
+++ b/deps/v8/test/mjsunit/mul-exhaustive-part1.js
@@ -0,0 +1,491 @@
+// Copyright 2008 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+var x;
+
+// Converts a number to string respecting -0.
+function stringify(n) {
+  if ((1 / n) === -Infinity) return "-0";
+  return String(n);
+}
+
+function f(expected, y) {
+  function testEval(string, x, y) {
+    var mulFunction = Function("x, y", "return " + string);
+    return mulFunction(x, y);
+  }
+  function mulTest(expected, x, y) {
+    assertEquals(expected, x * y);
+    assertEquals(expected, testEval(stringify(x) + " * y", x, y));
+    assertEquals(expected, testEval("x * " + stringify(y), x, y));
+    assertEquals(expected, testEval(stringify(x) + " * " + stringify(y), x, y));
+  }
+  mulTest(expected, x, y);
+  mulTest(-expected, -x, y);
+  mulTest(-expected, x, -y);
+  mulTest(expected, -x, -y);
+  if (x === y) return;  // Symmetric cases not necessary.
+  mulTest(expected, y, x);
+  mulTest(-expected, -y, x);
+  mulTest(-expected, y, -x);
+  mulTest(expected, -y, -x);
+}
+
+x = 0;
+f(0, 0);
+x = 1;
+f(0, 0);
+f(1, 1);
+x = 2;
+f(0, 0);
+f(2, 1);
+f(4, 2);
+x = 3;
+f(0, 0);
+f(3, 1);
+f(6, 2);
+f(9, 3);
+x = 4;
+f(0, 0);
+f(4, 1);
+f(8, 2);
+f(12, 3);
+f(16, 4);
+x = 5;
+f(0, 0);
+f(5, 1);
+f(10, 2);
+f(15, 3);
+f(20, 4);
+f(25, 5);
+x = 7;
+f(0, 0);
+f(7, 1);
+f(14, 2);
+f(21, 3);
+f(28, 4);
+f(35, 5);
+f(49, 7);
+x = 8;
+f(0, 0);
+f(8, 1);
+f(16, 2);
+f(24, 3);
+f(32, 4);
+f(40, 5);
+f(56, 7);
+f(64, 8);
+x = 9;
+f(0, 0);
+f(9, 1);
+f(18, 2);
+f(27, 3);
+f(36, 4);
+f(45, 5);
+f(63, 7);
+f(72, 8);
+f(81, 9);
+x = 15;
+f(0, 0);
+f(15, 1);
+f(30, 2);
+f(45, 3);
+f(60, 4);
+f(75, 5);
+f(105, 7);
+f(120, 8);
+f(135, 9);
+f(225, 15);
+x = 16;
+f(0, 0);
+f(16, 1);
+f(32, 2);
+f(48, 3);
+f(64, 4);
+f(80, 5);
+f(112, 7);
+f(128, 8);
+f(144, 9);
+f(240, 15);
+f(256, 16);
+x = 17;
+f(0, 0);
+f(17, 1);
+f(34, 2);
+f(51, 3);
+f(68, 4);
+f(85, 5);
+f(119, 7);
+f(136, 8);
+f(153, 9);
+f(255, 15);
+f(272, 16);
+f(289, 17);
+x = 31;
+f(0, 0);
+f(31, 1);
+f(62, 2);
+f(93, 3);
+f(124, 4);
+f(155, 5);
+f(217, 7);
+f(248, 8);
+f(279, 9);
+f(465, 15);
+f(496, 16);
+f(527, 17);
+f(961, 31);
+x = 32;
+f(0, 0);
+f(32, 1);
+f(64, 2);
+f(96, 3);
+f(128, 4);
+f(160, 5);
+f(224, 7);
+f(256, 8);
+f(288, 9);
+f(480, 15);
+f(512, 16);
+f(544, 17);
+f(992, 31);
+f(1024, 32);
+x = 33;
+f(0, 0);
+f(33, 1);
+f(66, 2);
+f(99, 3);
+f(132, 4);
+f(165, 5);
+f(231, 7);
+f(264, 8);
+f(297, 9);
+f(495, 15);
+f(528, 16);
+f(561, 17);
+f(1023, 31);
+f(1056, 32);
+f(1089, 33);
+x = 63;
+f(0, 0);
+f(63, 1);
+f(126, 2);
+f(189, 3);
+f(252, 4);
+f(315, 5);
+f(441, 7);
+f(504, 8);
+f(567, 9);
+f(945, 15);
+f(1008, 16);
+f(1071, 17);
+f(1953, 31);
+f(2016, 32);
+f(2079, 33);
+f(3969, 63);
+x = 64;
+f(0, 0);
+f(64, 1);
+f(128, 2);
+f(192, 3);
+f(256, 4);
+f(320, 5);
+f(448, 7);
+f(512, 8);
+f(576, 9);
+f(960, 15);
+f(1024, 16);
+f(1088, 17);
+f(1984, 31);
+f(2048, 32);
+f(2112, 33);
+f(4032, 63);
+f(4096, 64);
+x = 65;
+f(0, 0);
+f(65, 1);
+f(130, 2);
+f(195, 3);
+f(260, 4);
+f(325, 5);
+f(455, 7);
+f(520, 8);
+f(585, 9);
+f(975, 15);
+f(1040, 16);
+f(1105, 17);
+f(2015, 31);
+f(2080, 32);
+f(2145, 33);
+f(4095, 63);
+f(4160, 64);
+f(4225, 65);
+x = 127;
+f(0, 0);
+f(127, 1);
+f(254, 2);
+f(381, 3);
+f(508, 4);
+f(635, 5);
+f(889, 7);
+f(1016, 8);
+f(1143, 9);
+f(1905, 15);
+f(2032, 16);
+f(2159, 17);
+f(3937, 31);
+f(4064, 32);
+f(4191, 33);
+f(8001, 63);
+f(8128, 64);
+f(8255, 65);
+f(16129, 127);
+x = 128;
+f(0, 0);
+f(128, 1);
+f(256, 2);
+f(384, 3);
+f(512, 4);
+f(640, 5);
+f(896, 7);
+f(1024, 8);
+f(1152, 9);
+f(1920, 15);
+f(2048, 16);
+f(2176, 17);
+f(3968, 31);
+f(4096, 32);
+f(4224, 33);
+f(8064, 63);
+f(8192, 64);
+f(8320, 65);
+f(16256, 127);
+f(16384, 128);
+x = 129;
+f(0, 0);
+f(129, 1);
+f(258, 2);
+f(387, 3);
+f(516, 4);
+f(645, 5);
+f(903, 7);
+f(1032, 8);
+f(1161, 9);
+f(1935, 15);
+f(2064, 16);
+f(2193, 17);
+f(3999, 31);
+f(4128, 32);
+f(4257, 33);
+f(8127, 63);
+f(8256, 64);
+f(8385, 65);
+f(16383, 127);
+f(16512, 128);
+f(16641, 129);
+x = 255;
+f(0, 0);
+f(255, 1);
+f(510, 2);
+f(765, 3);
+f(1020, 4);
+f(1275, 5);
+f(1785, 7);
+f(2040, 8);
+f(2295, 9);
+f(3825, 15);
+f(4080, 16);
+f(4335, 17);
+f(7905, 31);
+f(8160, 32);
+f(8415, 33);
+f(16065, 63);
+f(16320, 64);
+f(16575, 65);
+f(32385, 127);
+f(32640, 128);
+f(32895, 129);
+f(65025, 255);
+x = 256;
+f(0, 0);
+f(256, 1);
+f(512, 2);
+f(768, 3);
+f(1024, 4);
+f(1280, 5);
+f(1792, 7);
+f(2048, 8);
+f(2304, 9);
+f(3840, 15);
+f(4096, 16);
+f(4352, 17);
+f(7936, 31);
+f(8192, 32);
+f(8448, 33);
+f(16128, 63);
+f(16384, 64);
+f(16640, 65);
+f(32512, 127);
+f(32768, 128);
+f(33024, 129);
+f(65280, 255);
+f(65536, 256);
+x = 257;
+f(0, 0);
+f(257, 1);
+f(514, 2);
+f(771, 3);
+f(1028, 4);
+f(1285, 5);
+f(1799, 7);
+f(2056, 8);
+f(2313, 9);
+f(3855, 15);
+f(4112, 16);
+f(4369, 17);
+f(7967, 31);
+f(8224, 32);
+f(8481, 33);
+f(16191, 63);
+f(16448, 64);
+f(16705, 65);
+f(32639, 127);
+f(32896, 128);
+f(33153, 129);
+f(65535, 255);
+f(65792, 256);
+f(66049, 257);
+x = 511;
+f(0, 0);
+f(511, 1);
+f(1022, 2);
+f(1533, 3);
+f(2044, 4);
+f(2555, 5);
+f(3577, 7);
+f(4088, 8);
+f(4599, 9);
+f(7665, 15);
+f(8176, 16);
+f(8687, 17);
+f(15841, 31);
+f(16352, 32);
+f(16863, 33);
+f(32193, 63);
+f(32704, 64);
+f(33215, 65);
+f(64897, 127);
+f(65408, 128);
+f(65919, 129);
+f(130305, 255);
+f(130816, 256);
+f(131327, 257);
+f(261121, 511);
+x = 512;
+f(0, 0);
+f(512, 1);
+f(1024, 2);
+f(1536, 3);
+f(2048, 4);
+f(2560, 5);
+f(3584, 7);
+f(4096, 8);
+f(4608, 9);
+f(7680, 15);
+f(8192, 16);
+f(8704, 17);
+f(15872, 31);
+f(16384, 32);
+f(16896, 33);
+f(32256, 63);
+f(32768, 64);
+f(33280, 65);
+f(65024, 127);
+f(65536, 128);
+f(66048, 129);
+f(130560, 255);
+f(131072, 256);
+f(131584, 257);
+f(261632, 511);
+f(262144, 512);
+x = 513;
+f(0, 0);
+f(513, 1);
+f(1026, 2);
+f(1539, 3);
+f(2052, 4);
+f(2565, 5);
+f(3591, 7);
+f(4104, 8);
+f(4617, 9);
+f(7695, 15);
+f(8208, 16);
+f(8721, 17);
+f(15903, 31);
+f(16416, 32);
+f(16929, 33);
+f(32319, 63);
+f(32832, 64);
+f(33345, 65);
+f(65151, 127);
+f(65664, 128);
+f(66177, 129);
+f(130815, 255);
+f(131328, 256);
+f(131841, 257);
+f(262143, 511);
+f(262656, 512);
+f(263169, 513);
+x = 1023;
+f(0, 0);
+f(1023, 1);
+f(2046, 2);
+f(3069, 3);
+f(4092, 4);
+f(5115, 5);
+f(7161, 7);
+f(8184, 8);
+f(9207, 9);
+f(15345, 15);
+f(16368, 16);
+f(17391, 17);
+f(31713, 31);
+f(32736, 32);
+f(33759, 33);
+f(64449, 63);
+f(65472, 64);
+f(66495, 65);
+f(129921, 127);
+f(130944, 128);
+f(131967, 129);
+f(260865, 255);
+f(261888, 256);
+f(262911, 257);
+f(522753, 511);
+f(523776, 512);
+f(524799, 513);
+f(1046529, 1023);
diff --git a/deps/v8/test/mjsunit/mul-exhaustive-part10.js b/deps/v8/test/mjsunit/mul-exhaustive-part10.js
new file mode 100644
index 0000000000..166ec52171
--- /dev/null
+++ b/deps/v8/test/mjsunit/mul-exhaustive-part10.js
@@ -0,0 +1,470 @@
+// Copyright 2008 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+var x;
+
+// Converts a number to string respecting -0.
+function stringify(n) {
+  if ((1 / n) === -Infinity) return "-0";
+  return String(n);
+}
+
+function f(expected, y) {
+  function testEval(string, x, y) {
+    var mulFunction = Function("x, y", "return " + string);
+    return mulFunction(x, y);
+  }
+  function mulTest(expected, x, y) {
+    assertEquals(expected, x * y);
+    assertEquals(expected, testEval(stringify(x) + " * y", x, y));
+    assertEquals(expected, testEval("x * " + stringify(y), x, y));
+    assertEquals(expected, testEval(stringify(x) + " * " + stringify(y), x, y));
+  }
+  mulTest(expected, x, y);
+  mulTest(-expected, -x, y);
+  mulTest(-expected, x, -y);
+  mulTest(expected, -x, -y);
+  if (x === y) return;  // Symmetric cases not necessary.
+  mulTest(expected, y, x);
+  mulTest(-expected, -y, x);
+  mulTest(-expected, y, -x);
+  mulTest(expected, -y, -x);
+}
+
+x = 4294967296;
+f(0, 0);
+f(4294967296, 1);
+f(8589934592, 2);
+f(12884901888, 3);
+f(17179869184, 4);
+f(21474836480, 5);
+f(30064771072, 7);
+f(34359738368, 8);
+f(38654705664, 9);
+f(64424509440, 15);
+f(68719476736, 16);
+f(73014444032, 17);
+f(133143986176, 31);
+f(137438953472, 32);
+f(141733920768, 33);
+f(270582939648, 63);
+f(274877906944, 64);
+f(279172874240, 65);
+f(545460846592, 127);
+f(549755813888, 128);
+f(554050781184, 129);
+f(1095216660480, 255);
+f(1099511627776, 256);
+f(1103806595072, 257);
+f(2194728288256, 511);
+f(2199023255552, 512);
+f(2203318222848, 513);
+f(4393751543808, 1023);
+f(4398046511104, 1024);
+f(4402341478400, 1025);
+f(8791798054912, 2047);
+f(8796093022208, 2048);
+f(8800387989504, 2049);
+f(17587891077120, 4095);
+f(17592186044416, 4096);
+f(17596481011712, 4097);
+f(35180077121536, 8191);
+f(35184372088832, 8192);
+f(35188667056128, 8193);
+f(70364449210368, 16383);
+f(70368744177664, 16384);
+f(70373039144960, 16385);
+f(140733193388032, 32767);
+f(140737488355328, 32768);
+f(140741783322624, 32769);
+f(281470681743360, 65535);
+f(281474976710656, 65536);
+f(281479271677952, 65537);
+f(562945658454016, 131071);
+f(562949953421312, 131072);
+f(562954248388608, 131073);
+f(1125895611875328, 262143);
+f(1125899906842624, 262144);
+f(1125904201809920, 262145);
+x = 4294967297;
+f(0, 0);
+f(4294967297, 1);
+f(8589934594, 2);
+f(12884901891, 3);
+f(17179869188, 4);
+f(21474836485, 5);
+f(30064771079, 7);
+f(34359738376, 8);
+f(38654705673, 9);
+f(64424509455, 15);
+f(68719476752, 16);
+f(73014444049, 17);
+f(133143986207, 31);
+f(137438953504, 32);
+f(141733920801, 33);
+f(270582939711, 63);
+f(274877907008, 64);
+f(279172874305, 65);
+f(545460846719, 127);
+f(549755814016, 128);
+f(554050781313, 129);
+f(1095216660735, 255);
+f(1099511628032, 256);
+f(1103806595329, 257);
+f(2194728288767, 511);
+f(2199023256064, 512);
+f(2203318223361, 513);
+f(4393751544831, 1023);
+f(4398046512128, 1024);
+f(4402341479425, 1025);
+f(8791798056959, 2047);
+f(8796093024256, 2048);
+f(8800387991553, 2049);
+f(17587891081215, 4095);
+f(17592186048512, 4096);
+f(17596481015809, 4097);
+f(35180077129727, 8191);
+f(35184372097024, 8192);
+f(35188667064321, 8193);
+f(70364449226751, 16383);
+f(70368744194048, 16384);
+f(70373039161345, 16385);
+f(140733193420799, 32767);
+f(140737488388096, 32768);
+f(140741783355393, 32769);
+f(281470681808895, 65535);
+f(281474976776192, 65536);
+f(281479271743489, 65537);
+f(562945658585087, 131071);
+f(562949953552384, 131072);
+f(562954248519681, 131073);
+f(1125895612137471, 262143);
+f(1125899907104768, 262144);
+f(1125904202072065, 262145);
+x = 8589934591;
+f(0, 0);
+f(8589934591, 1);
+f(17179869182, 2);
+f(25769803773, 3);
+f(34359738364, 4);
+f(42949672955, 5);
+f(60129542137, 7);
+f(68719476728, 8);
+f(77309411319, 9);
+f(128849018865, 15);
+f(137438953456, 16);
+f(146028888047, 17);
+f(266287972321, 31);
+f(274877906912, 32);
+f(283467841503, 33);
+f(541165879233, 63);
+f(549755813824, 64);
+f(558345748415, 65);
+f(1090921693057, 127);
+f(1099511627648, 128);
+f(1108101562239, 129);
+f(2190433320705, 255);
+f(2199023255296, 256);
+f(2207613189887, 257);
+f(4389456576001, 511);
+f(4398046510592, 512);
+f(4406636445183, 513);
+f(8787503086593, 1023);
+f(8796093021184, 1024);
+f(8804682955775, 1025);
+f(17583596107777, 2047);
+f(17592186042368, 2048);
+f(17600775976959, 2049);
+f(35175782150145, 4095);
+f(35184372084736, 4096);
+f(35192962019327, 4097);
+f(70360154234881, 8191);
+f(70368744169472, 8192);
+f(70377334104063, 8193);
+f(140728898404353, 16383);
+f(140737488338944, 16384);
+f(140746078273535, 16385);
+f(281466386743297, 32767);
+f(281474976677888, 32768);
+f(281483566612479, 32769);
+f(562941363421185, 65535);
+f(562949953355776, 65536);
+f(562958543290367, 65537);
+f(1125891316776961, 131071);
+f(1125899906711552, 131072);
+f(1125908496646143, 131073);
+x = 8589934592;
+f(0, 0);
+f(8589934592, 1);
+f(17179869184, 2);
+f(25769803776, 3);
+f(34359738368, 4);
+f(42949672960, 5);
+f(60129542144, 7);
+f(68719476736, 8);
+f(77309411328, 9);
+f(128849018880, 15);
+f(137438953472, 16);
+f(146028888064, 17);
+f(266287972352, 31);
+f(274877906944, 32);
+f(283467841536, 33);
+f(541165879296, 63);
+f(549755813888, 64);
+f(558345748480, 65);
+f(1090921693184, 127);
+f(1099511627776, 128);
+f(1108101562368, 129);
+f(2190433320960, 255);
+f(2199023255552, 256);
+f(2207613190144, 257);
+f(4389456576512, 511);
+f(4398046511104, 512);
+f(4406636445696, 513);
+f(8787503087616, 1023);
+f(8796093022208, 1024);
+f(8804682956800, 1025);
+f(17583596109824, 2047);
+f(17592186044416, 2048);
+f(17600775979008, 2049);
+f(35175782154240, 4095);
+f(35184372088832, 4096);
+f(35192962023424, 4097);
+f(70360154243072, 8191);
+f(70368744177664, 8192);
+f(70377334112256, 8193);
+f(140728898420736, 16383);
+f(140737488355328, 16384);
+f(140746078289920, 16385);
+f(281466386776064, 32767);
+f(281474976710656, 32768);
+f(281483566645248, 32769);
+f(562941363486720, 65535);
+f(562949953421312, 65536);
+f(562958543355904, 65537);
+f(1125891316908032, 131071);
+f(1125899906842624, 131072);
+f(1125908496777216, 131073);
+x = 8589934593;
+f(0, 0);
+f(8589934593, 1);
+f(17179869186, 2);
+f(25769803779, 3);
+f(34359738372, 4);
+f(42949672965, 5);
+f(60129542151, 7);
+f(68719476744, 8);
+f(77309411337, 9);
+f(128849018895, 15);
+f(137438953488, 16);
+f(146028888081, 17);
+f(266287972383, 31);
+f(274877906976, 32);
+f(283467841569, 33);
+f(541165879359, 63);
+f(549755813952, 64);
+f(558345748545, 65);
+f(1090921693311, 127);
+f(1099511627904, 128);
+f(1108101562497, 129);
+f(2190433321215, 255);
+f(2199023255808, 256);
+f(2207613190401, 257);
+f(4389456577023, 511);
+f(4398046511616, 512);
+f(4406636446209, 513);
+f(8787503088639, 1023);
+f(8796093023232, 1024);
+f(8804682957825, 1025);
+f(17583596111871, 2047);
+f(17592186046464, 2048);
+f(17600775981057, 2049);
+f(35175782158335, 4095);
+f(35184372092928, 4096);
+f(35192962027521, 4097);
+f(70360154251263, 8191);
+f(70368744185856, 8192);
+f(70377334120449, 8193);
+f(140728898437119, 16383);
+f(140737488371712, 16384);
+f(140746078306305, 16385);
+f(281466386808831, 32767);
+f(281474976743424, 32768);
+f(281483566678017, 32769);
+f(562941363552255, 65535);
+f(562949953486848, 65536);
+f(562958543421441, 65537);
+f(1125891317039103, 131071);
+f(1125899906973696, 131072);
+f(1125908496908289, 131073);
+x = 17179869183;
+f(0, 0);
+f(17179869183, 1);
+f(34359738366, 2);
+f(51539607549, 3);
+f(68719476732, 4);
+f(85899345915, 5);
+f(120259084281, 7);
+f(137438953464, 8);
+f(154618822647, 9);
+f(257698037745, 15);
+f(274877906928, 16);
+f(292057776111, 17);
+f(532575944673, 31);
+f(549755813856, 32);
+f(566935683039, 33);
+f(1082331758529, 63);
+f(1099511627712, 64);
+f(1116691496895, 65);
+f(2181843386241, 127);
+f(2199023255424, 128);
+f(2216203124607, 129);
+f(4380866641665, 255);
+f(4398046510848, 256);
+f(4415226380031, 257);
+f(8778913152513, 511);
+f(8796093021696, 512);
+f(8813272890879, 513);
+f(17575006174209, 1023);
+f(17592186043392, 1024);
+f(17609365912575, 1025);
+f(35167192217601, 2047);
+f(35184372086784, 2048);
+f(35201551955967, 2049);
+f(70351564304385, 4095);
+f(70368744173568, 4096);
+f(70385924042751, 4097);
+f(140720308477953, 8191);
+f(140737488347136, 8192);
+f(140754668216319, 8193);
+f(281457796825089, 16383);
+f(281474976694272, 16384);
+f(281492156563455, 16385);
+f(562932773519361, 32767);
+f(562949953388544, 32768);
+f(562967133257727, 32769);
+f(1125882726907905, 65535);
+f(1125899906777088, 65536);
+f(1125917086646271, 65537);
+x = 17179869184;
+f(0, 0);
+f(17179869184, 1);
+f(34359738368, 2);
+f(51539607552, 3);
+f(68719476736, 4);
+f(85899345920, 5);
+f(120259084288, 7);
+f(137438953472, 8);
+f(154618822656, 9);
+f(257698037760, 15);
+f(274877906944, 16);
+f(292057776128, 17);
+f(532575944704, 31);
+f(549755813888, 32);
+f(566935683072, 33);
+f(1082331758592, 63);
+f(1099511627776, 64);
+f(1116691496960, 65);
+f(2181843386368, 127);
+f(2199023255552, 128);
+f(2216203124736, 129);
+f(4380866641920, 255);
+f(4398046511104, 256);
+f(4415226380288, 257);
+f(8778913153024, 511);
+f(8796093022208, 512);
+f(8813272891392, 513);
+f(17575006175232, 1023);
+f(17592186044416, 1024);
+f(17609365913600, 1025);
+f(35167192219648, 2047);
+f(35184372088832, 2048);
+f(35201551958016, 2049);
+f(70351564308480, 4095);
+f(70368744177664, 4096);
+f(70385924046848, 4097);
+f(140720308486144, 8191);
+f(140737488355328, 8192);
+f(140754668224512, 8193);
+f(281457796841472, 16383);
+f(281474976710656, 16384);
+f(281492156579840, 16385);
+f(562932773552128, 32767);
+f(562949953421312, 32768);
+f(562967133290496, 32769);
+f(1125882726973440, 65535);
+f(1125899906842624, 65536);
+f(1125917086711808, 65537);
+x = 17179869185;
+f(0, 0);
+f(17179869185, 1);
+f(34359738370, 2);
+f(51539607555, 3);
+f(68719476740, 4);
+f(85899345925, 5);
+f(120259084295, 7);
+f(137438953480, 8);
+f(154618822665, 9);
+f(257698037775, 15);
+f(274877906960, 16);
+f(292057776145, 17);
+f(532575944735, 31);
+f(549755813920, 32);
+f(566935683105, 33);
+f(1082331758655, 63);
+f(1099511627840, 64);
+f(1116691497025, 65);
+f(2181843386495, 127);
+f(2199023255680, 128);
+f(2216203124865, 129);
+f(4380866642175, 255);
+f(4398046511360, 256);
+f(4415226380545, 257);
+f(8778913153535, 511);
+f(8796093022720, 512);
+f(8813272891905, 513);
+f(17575006176255, 1023);
+f(17592186045440, 1024);
+f(17609365914625, 1025);
+f(35167192221695, 2047);
+f(35184372090880, 2048);
+f(35201551960065, 2049);
+f(70351564312575, 4095);
+f(70368744181760, 4096);
+f(70385924050945, 4097);
+f(140720308494335, 8191);
+f(140737488363520, 8192);
+f(140754668232705, 8193);
+f(281457796857855, 16383);
+f(281474976727040, 16384);
+f(281492156596225, 16385);
+f(562932773584895, 32767);
+f(562949953454080, 32768);
+f(562967133323265, 32769);
+f(1125882727038975, 65535);
+f(1125899906908160, 65536);
+f(1125917086777345, 65537);
diff --git a/deps/v8/test/mjsunit/mul-exhaustive-part2.js b/deps/v8/test/mjsunit/mul-exhaustive-part2.js
new file mode 100644
index 0000000000..4c4a123847
--- /dev/null
+++ b/deps/v8/test/mjsunit/mul-exhaustive-part2.js
@@ -0,0 +1,525 @@
+// Copyright 2008 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+var x;
+
+// Converts a number to string respecting -0.
+function stringify(n) {
+  if ((1 / n) === -Infinity) return "-0";
+  return String(n);
+}
+
+function f(expected, y) {
+  function testEval(string, x, y) {
+    var mulFunction = Function("x, y", "return " + string);
+    return mulFunction(x, y);
+  }
+  function mulTest(expected, x, y) {
+    assertEquals(expected, x * y);
+    assertEquals(expected, testEval(stringify(x) + " * y", x, y));
+    assertEquals(expected, testEval("x * " + stringify(y), x, y));
+    assertEquals(expected, testEval(stringify(x) + " * " + stringify(y), x, y));
+  }
+  mulTest(expected, x, y);
+  mulTest(-expected, -x, y);
+  mulTest(-expected, x, -y);
+  mulTest(expected, -x, -y);
+  if (x === y) return;  // Symmetric cases not necessary.
+  mulTest(expected, y, x);
+  mulTest(-expected, -y, x);
+  mulTest(-expected, y, -x);
+  mulTest(expected, -y, -x);
+}
+
+x = 1024;
+f(0, 0);
+f(1024, 1);
+f(2048, 2);
+f(3072, 3);
+f(4096, 4);
+f(5120, 5);
+f(7168, 7);
+f(8192, 8);
+f(9216, 9);
+f(15360, 15);
+f(16384, 16);
+f(17408, 17);
+f(31744, 31);
+f(32768, 32);
+f(33792, 33);
+f(64512, 63);
+f(65536, 64);
+f(66560, 65);
+f(130048, 127);
+f(131072, 128);
+f(132096, 129);
+f(261120, 255);
+f(262144, 256);
+f(263168, 257);
+f(523264, 511);
+f(524288, 512);
+f(525312, 513);
+f(1047552, 1023);
+f(1048576, 1024);
+x = 1025;
+f(0, 0);
+f(1025, 1);
+f(2050, 2);
+f(3075, 3);
+f(4100, 4);
+f(5125, 5);
+f(7175, 7);
+f(8200, 8);
+f(9225, 9);
+f(15375, 15);
+f(16400, 16);
+f(17425, 17);
+f(31775, 31);
+f(32800, 32);
+f(33825, 33);
+f(64575, 63);
+f(65600, 64);
+f(66625, 65);
+f(130175, 127);
+f(131200, 128);
+f(132225, 129);
+f(261375, 255);
+f(262400, 256);
+f(263425, 257);
+f(523775, 511);
+f(524800, 512);
+f(525825, 513);
+f(1048575, 1023);
+f(1049600, 1024);
+f(1050625, 1025);
+x = 2047;
+f(0, 0);
+f(2047, 1);
+f(4094, 2);
+f(6141, 3);
+f(8188, 4);
+f(10235, 5);
+f(14329, 7);
+f(16376, 8);
+f(18423, 9);
+f(30705, 15);
+f(32752, 16);
+f(34799, 17);
+f(63457, 31);
+f(65504, 32);
+f(67551, 33);
+f(128961, 63);
+f(131008, 64);
+f(133055, 65);
+f(259969, 127);
+f(262016, 128);
+f(264063, 129);
+f(521985, 255);
+f(524032, 256);
+f(526079, 257);
+f(1046017, 511);
+f(1048064, 512);
+f(1050111, 513);
+f(2094081, 1023);
+f(2096128, 1024);
+f(2098175, 1025);
+f(4190209, 2047);
+x = 2048;
+f(0, 0);
+f(2048, 1);
+f(4096, 2);
+f(6144, 3);
+f(8192, 4);
+f(10240, 5);
+f(14336, 7);
+f(16384, 8);
+f(18432, 9);
+f(30720, 15);
+f(32768, 16);
+f(34816, 17);
+f(63488, 31);
+f(65536, 32);
+f(67584, 33);
+f(129024, 63);
+f(131072, 64);
+f(133120, 65);
+f(260096, 127);
+f(262144, 128);
+f(264192, 129);
+f(522240, 255);
+f(524288, 256);
+f(526336, 257);
+f(1046528, 511);
+f(1048576, 512);
+f(1050624, 513);
+f(2095104, 1023);
+f(2097152, 1024);
+f(2099200, 1025);
+f(4192256, 2047);
+f(4194304, 2048);
+x = 2049;
+f(0, 0);
+f(2049, 1);
+f(4098, 2);
+f(6147, 3);
+f(8196, 4);
+f(10245, 5);
+f(14343, 7);
+f(16392, 8);
+f(18441, 9);
+f(30735, 15);
+f(32784, 16);
+f(34833, 17);
+f(63519, 31);
+f(65568, 32);
+f(67617, 33);
+f(129087, 63);
+f(131136, 64);
+f(133185, 65);
+f(260223, 127);
+f(262272, 128);
+f(264321, 129);
+f(522495, 255);
+f(524544, 256);
+f(526593, 257);
+f(1047039, 511);
+f(1049088, 512);
+f(1051137, 513);
+f(2096127, 1023);
+f(2098176, 1024);
+f(2100225, 1025);
+f(4194303, 2047);
+f(4196352, 2048);
+f(4198401, 2049);
+x = 4095;
+f(0, 0);
+f(4095, 1);
+f(8190, 2);
+f(12285, 3);
+f(16380, 4);
+f(20475, 5);
+f(28665, 7);
+f(32760, 8);
+f(36855, 9);
+f(61425, 15);
+f(65520, 16);
+f(69615, 17);
+f(126945, 31);
+f(131040, 32);
+f(135135, 33);
+f(257985, 63);
+f(262080, 64);
+f(266175, 65);
+f(520065, 127);
+f(524160, 128);
+f(528255, 129);
+f(1044225, 255);
+f(1048320, 256);
+f(1052415, 257);
+f(2092545, 511);
+f(2096640, 512);
+f(2100735, 513);
+f(4189185, 1023);
+f(4193280, 1024);
+f(4197375, 1025);
+f(8382465, 2047);
+f(8386560, 2048);
+f(8390655, 2049);
+f(16769025, 4095);
+x = 4096;
+f(0, 0);
+f(4096, 1);
+f(8192, 2);
+f(12288, 3);
+f(16384, 4);
+f(20480, 5);
+f(28672, 7);
+f(32768, 8);
+f(36864, 9);
+f(61440, 15);
+f(65536, 16);
+f(69632, 17);
+f(126976, 31);
+f(131072, 32);
+f(135168, 33);
+f(258048, 63);
+f(262144, 64);
+f(266240, 65);
+f(520192, 127);
+f(524288, 128);
+f(528384, 129);
+f(1044480, 255);
+f(1048576, 256);
+f(1052672, 257);
+f(2093056, 511);
+f(2097152, 512);
+f(2101248, 513);
+f(4190208, 1023);
+f(4194304, 1024);
+f(4198400, 1025);
+f(8384512, 2047);
+f(8388608, 2048);
+f(8392704, 2049);
+f(16773120, 4095);
+f(16777216, 4096);
+x = 4097;
+f(0, 0);
+f(4097, 1);
+f(8194, 2);
+f(12291, 3);
+f(16388, 4);
+f(20485, 5);
+f(28679, 7);
+f(32776, 8);
+f(36873, 9);
+f(61455, 15);
+f(65552, 16);
+f(69649, 17);
+f(127007, 31);
+f(131104, 32);
+f(135201, 33);
+f(258111, 63);
+f(262208, 64);
+f(266305, 65);
+f(520319, 127);
+f(524416, 128);
+f(528513, 129);
+f(1044735, 255);
+f(1048832, 256);
+f(1052929, 257);
+f(2093567, 511);
+f(2097664, 512);
+f(2101761, 513);
+f(4191231, 1023);
+f(4195328, 1024);
+f(4199425, 1025);
+f(8386559, 2047);
+f(8390656, 2048);
+f(8394753, 2049);
+f(16777215, 4095);
+f(16781312, 4096);
+f(16785409, 4097);
+x = 8191;
+f(0, 0);
+f(8191, 1);
+f(16382, 2);
+f(24573, 3);
+f(32764, 4);
+f(40955, 5);
+f(57337, 7);
+f(65528, 8);
+f(73719, 9);
+f(122865, 15);
+f(131056, 16);
+f(139247, 17);
+f(253921, 31);
+f(262112, 32);
+f(270303, 33);
+f(516033, 63);
+f(524224, 64);
+f(532415, 65);
+f(1040257, 127);
+f(1048448, 128);
+f(1056639, 129);
+f(2088705, 255);
+f(2096896, 256);
+f(2105087, 257);
+f(4185601, 511);
+f(4193792, 512);
+f(4201983, 513);
+f(8379393, 1023);
+f(8387584, 1024);
+f(8395775, 1025);
+f(16766977, 2047);
+f(16775168, 2048);
+f(16783359, 2049);
+f(33542145, 4095);
+f(33550336, 4096);
+f(33558527, 4097);
+f(67092481, 8191);
+x = 8192;
+f(0, 0);
+f(8192, 1);
+f(16384, 2);
+f(24576, 3);
+f(32768, 4);
+f(40960, 5);
+f(57344, 7);
+f(65536, 8);
+f(73728, 9);
+f(122880, 15);
+f(131072, 16);
+f(139264, 17);
+f(253952, 31);
+f(262144, 32);
+f(270336, 33);
+f(516096, 63);
+f(524288, 64);
+f(532480, 65);
+f(1040384, 127);
+f(1048576, 128);
+f(1056768, 129);
+f(2088960, 255);
+f(2097152, 256);
+f(2105344, 257);
+f(4186112, 511);
+f(4194304, 512);
+f(4202496, 513);
+f(8380416, 1023);
+f(8388608, 1024);
+f(8396800, 1025);
+f(16769024, 2047);
+f(16777216, 2048);
+f(16785408, 2049);
+f(33546240, 4095);
+f(33554432, 4096);
+f(33562624, 4097);
+f(67100672, 8191);
+f(67108864, 8192);
+x = 8193;
+f(0, 0);
+f(8193, 1);
+f(16386, 2);
+f(24579, 3);
+f(32772, 4);
+f(40965, 5);
+f(57351, 7);
+f(65544, 8);
+f(73737, 9);
+f(122895, 15);
+f(131088, 16);
+f(139281, 17);
+f(253983, 31);
+f(262176, 32);
+f(270369, 33);
+f(516159, 63);
+f(524352, 64);
+f(532545, 65);
+f(1040511, 127);
+f(1048704, 128);
+f(1056897, 129);
+f(2089215, 255);
+f(2097408, 256);
+f(2105601, 257);
+f(4186623, 511);
+f(4194816, 512);
+f(4203009, 513);
+f(8381439, 1023);
+f(8389632, 1024);
+f(8397825, 1025);
+f(16771071, 2047);
+f(16779264, 2048);
+f(16787457, 2049);
+f(33550335, 4095);
+f(33558528, 4096);
+f(33566721, 4097);
+f(67108863, 8191);
+f(67117056, 8192);
+f(67125249, 8193);
+x = 16383;
+f(0, 0);
+f(16383, 1);
+f(32766, 2);
+f(49149, 3);
+f(65532, 4);
+f(81915, 5);
+f(114681, 7);
+f(131064, 8);
+f(147447, 9);
+f(245745, 15);
+f(262128, 16);
+f(278511, 17);
+f(507873, 31);
+f(524256, 32);
+f(540639, 33);
+f(1032129, 63);
+f(1048512, 64);
+f(1064895, 65);
+f(2080641, 127);
+f(2097024, 128);
+f(2113407, 129);
+f(4177665, 255);
+f(4194048, 256);
+f(4210431, 257);
+f(8371713, 511);
+f(8388096, 512);
+f(8404479, 513);
+f(16759809, 1023);
+f(16776192, 1024);
+f(16792575, 1025);
+f(33536001, 2047);
+f(33552384, 2048);
+f(33568767, 2049);
+f(67088385, 4095);
+f(67104768, 4096);
+f(67121151, 4097);
+f(134193153, 8191);
+f(134209536, 8192);
+f(134225919, 8193);
+f(268402689, 16383);
+x = 16384;
+f(0, 0);
+f(16384, 1);
+f(32768, 2);
+f(49152, 3);
+f(65536, 4);
+f(81920, 5);
+f(114688, 7);
+f(131072, 8);
+f(147456, 9);
+f(245760, 15);
+f(262144, 16);
+f(278528, 17);
+f(507904, 31);
+f(524288, 32);
+f(540672, 33);
+f(1032192, 63);
+f(1048576, 64);
+f(1064960, 65);
+f(2080768, 127);
+f(2097152, 128);
+f(2113536, 129);
+f(4177920, 255);
+f(4194304, 256);
+f(4210688, 257);
+f(8372224, 511);
+f(8388608, 512);
+f(8404992, 513);
+f(16760832, 1023);
+f(16777216, 1024);
+f(16793600, 1025);
+f(33538048, 2047);
+f(33554432, 2048);
+f(33570816, 2049);
+f(67092480, 4095);
+f(67108864, 4096);
+f(67125248, 4097);
+f(134201344, 8191);
+f(134217728, 8192);
+f(134234112, 8193);
+f(268419072, 16383);
+f(268435456, 16384);
diff --git a/deps/v8/test/mjsunit/mul-exhaustive-part3.js b/deps/v8/test/mjsunit/mul-exhaustive-part3.js
new file mode 100644
index 0000000000..06e41a1d46
--- /dev/null
+++ b/deps/v8/test/mjsunit/mul-exhaustive-part3.js
@@ -0,0 +1,532 @@
+// Copyright 2008 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+var x;
+
+// Converts a number to string respecting -0.
+function stringify(n) {
+  if ((1 / n) === -Infinity) return "-0";
+  return String(n);
+}
+
+function f(expected, y) {
+  function testEval(string, x, y) {
+    var mulFunction = Function("x, y", "return " + string);
+    return mulFunction(x, y);
+  }
+  function mulTest(expected, x, y) {
+    assertEquals(expected, x * y);
+    assertEquals(expected, testEval(stringify(x) + " * y", x, y));
+    assertEquals(expected, testEval("x * " + stringify(y), x, y));
+    assertEquals(expected, testEval(stringify(x) + " * " + stringify(y), x, y));
+  }
+  mulTest(expected, x, y);
+  mulTest(-expected, -x, y);
+  mulTest(-expected, x, -y);
+  mulTest(expected, -x, -y);
+  if (x === y) return;  // Symmetric cases not necessary.
+  mulTest(expected, y, x);
+  mulTest(-expected, -y, x);
+  mulTest(-expected, y, -x);
+  mulTest(expected, -y, -x);
+}
+
+x = 16385;
+f(0, 0);
+f(16385, 1);
+f(32770, 2);
+f(49155, 3);
+f(65540, 4);
+f(81925, 5);
+f(114695, 7);
+f(131080, 8);
+f(147465, 9);
+f(245775, 15);
+f(262160, 16);
+f(278545, 17);
+f(507935, 31);
+f(524320, 32);
+f(540705, 33);
+f(1032255, 63);
+f(1048640, 64);
+f(1065025, 65);
+f(2080895, 127);
+f(2097280, 128);
+f(2113665, 129);
+f(4178175, 255);
+f(4194560, 256);
+f(4210945, 257);
+f(8372735, 511);
+f(8389120, 512);
+f(8405505, 513);
+f(16761855, 1023);
+f(16778240, 1024);
+f(16794625, 1025);
+f(33540095, 2047);
+f(33556480, 2048);
+f(33572865, 2049);
+f(67096575, 4095);
+f(67112960, 4096);
+f(67129345, 4097);
+f(134209535, 8191);
+f(134225920, 8192);
+f(134242305, 8193);
+f(268435455, 16383);
+f(268451840, 16384);
+f(268468225, 16385);
+x = 32767;
+f(0, 0);
+f(32767, 1);
+f(65534, 2);
+f(98301, 3);
+f(131068, 4);
+f(163835, 5);
+f(229369, 7);
+f(262136, 8);
+f(294903, 9);
+f(491505, 15);
+f(524272, 16);
+f(557039, 17);
+f(1015777, 31);
+f(1048544, 32);
+f(1081311, 33);
+f(2064321, 63);
+f(2097088, 64);
+f(2129855, 65);
+f(4161409, 127);
+f(4194176, 128);
+f(4226943, 129);
+f(8355585, 255);
+f(8388352, 256);
+f(8421119, 257);
+f(16743937, 511);
+f(16776704, 512);
+f(16809471, 513);
+f(33520641, 1023);
+f(33553408, 1024);
+f(33586175, 1025);
+f(67074049, 2047);
+f(67106816, 2048);
+f(67139583, 2049);
+f(134180865, 4095);
+f(134213632, 4096);
+f(134246399, 4097);
+f(268394497, 8191);
+f(268427264, 8192);
+f(268460031, 8193);
+f(536821761, 16383);
+f(536854528, 16384);
+f(536887295, 16385);
+f(1073676289, 32767);
+x = 32768;
+f(0, 0);
+f(32768, 1);
+f(65536, 2);
+f(98304, 3);
+f(131072, 4);
+f(163840, 5);
+f(229376, 7);
+f(262144, 8);
+f(294912, 9);
+f(491520, 15);
+f(524288, 16);
+f(557056, 17);
+f(1015808, 31);
+f(1048576, 32);
+f(1081344, 33);
+f(2064384, 63);
+f(2097152, 64);
+f(2129920, 65);
+f(4161536, 127);
+f(4194304, 128);
+f(4227072, 129);
+f(8355840, 255);
+f(8388608, 256);
+f(8421376, 257);
+f(16744448, 511);
+f(16777216, 512);
+f(16809984, 513);
+f(33521664, 1023);
+f(33554432, 1024);
+f(33587200, 1025);
+f(67076096, 2047);
+f(67108864, 2048);
+f(67141632, 2049);
+f(134184960, 4095);
+f(134217728, 4096);
+f(134250496, 4097);
+f(268402688, 8191);
+f(268435456, 8192);
+f(268468224, 8193);
+f(536838144, 16383);
+f(536870912, 16384);
+f(536903680, 16385);
+f(1073709056, 32767);
+f(1073741824, 32768);
+x = 32769;
+f(0, 0);
+f(32769, 1);
+f(65538, 2);
+f(98307, 3);
+f(131076, 4);
+f(163845, 5);
+f(229383, 7);
+f(262152, 8);
+f(294921, 9);
+f(491535, 15);
+f(524304, 16);
+f(557073, 17);
+f(1015839, 31);
+f(1048608, 32);
+f(1081377, 33);
+f(2064447, 63);
+f(2097216, 64);
+f(2129985, 65);
+f(4161663, 127);
+f(4194432, 128);
+f(4227201, 129);
+f(8356095, 255);
+f(8388864, 256);
+f(8421633, 257);
+f(16744959, 511);
+f(16777728, 512);
+f(16810497, 513);
+f(33522687, 1023);
+f(33555456, 1024);
+f(33588225, 1025);
+f(67078143, 2047);
+f(67110912, 2048);
+f(67143681, 2049);
+f(134189055, 4095);
+f(134221824, 4096);
+f(134254593, 4097);
+f(268410879, 8191);
+f(268443648, 8192);
+f(268476417, 8193);
+f(536854527, 16383);
+f(536887296, 16384);
+f(536920065, 16385);
+f(1073741823, 32767);
+f(1073774592, 32768);
+f(1073807361, 32769);
+x = 65535;
+f(0, 0);
+f(65535, 1);
+f(131070, 2);
+f(196605, 3);
+f(262140, 4);
+f(327675, 5);
+f(458745, 7);
+f(524280, 8);
+f(589815, 9);
+f(983025, 15);
+f(1048560, 16);
+f(1114095, 17);
+f(2031585, 31);
+f(2097120, 32);
+f(2162655, 33);
+f(4128705, 63);
+f(4194240, 64);
+f(4259775, 65);
+f(8322945, 127);
+f(8388480, 128);
+f(8454015, 129);
+f(16711425, 255);
+f(16776960, 256);
+f(16842495, 257);
+f(33488385, 511);
+f(33553920, 512);
+f(33619455, 513);
+f(67042305, 1023);
+f(67107840, 1024);
+f(67173375, 1025);
+f(134150145, 2047);
+f(134215680, 2048);
+f(134281215, 2049);
+f(268365825, 4095);
+f(268431360, 4096);
+f(268496895, 4097);
+f(536797185, 8191);
+f(536862720, 8192);
+f(536928255, 8193);
+f(1073659905, 16383);
+f(1073725440, 16384);
+f(1073790975, 16385);
+f(2147385345, 32767);
+f(2147450880, 32768);
+f(2147516415, 32769);
+f(4294836225, 65535);
+x = 65536;
+f(0, 0);
+f(65536, 1);
+f(131072, 2);
+f(196608, 3);
+f(262144, 4);
+f(327680, 5);
+f(458752, 7);
+f(524288, 8);
+f(589824, 9);
+f(983040, 15);
+f(1048576, 16);
+f(1114112, 17);
+f(2031616, 31);
+f(2097152, 32);
+f(2162688, 33);
+f(4128768, 63);
+f(4194304, 64);
+f(4259840, 65);
+f(8323072, 127);
+f(8388608, 128);
+f(8454144, 129);
+f(16711680, 255);
+f(16777216, 256);
+f(16842752, 257);
+f(33488896, 511);
+f(33554432, 512);
+f(33619968, 513);
+f(67043328, 1023);
+f(67108864, 1024);
+f(67174400, 1025);
+f(134152192, 2047);
+f(134217728, 2048);
+f(134283264, 2049);
+f(268369920, 4095);
+f(268435456, 4096);
+f(268500992, 4097);
+f(536805376, 8191);
+f(536870912, 8192);
+f(536936448, 8193);
+f(1073676288, 16383);
+f(1073741824, 16384);
+f(1073807360, 16385);
+f(2147418112, 32767);
+f(2147483648, 32768);
+f(2147549184, 32769);
+f(4294901760, 65535);
+f(4294967296, 65536);
+x = 65537;
+f(0, 0);
+f(65537, 1);
+f(131074, 2);
+f(196611, 3);
+f(262148, 4);
+f(327685, 5);
+f(458759, 7);
+f(524296, 8);
+f(589833, 9);
+f(983055, 15);
+f(1048592, 16);
+f(1114129, 17);
+f(2031647, 31);
+f(2097184, 32);
+f(2162721, 33);
+f(4128831, 63);
+f(4194368, 64);
+f(4259905, 65);
+f(8323199, 127);
+f(8388736, 128);
+f(8454273, 129);
+f(16711935, 255);
+f(16777472, 256);
+f(16843009, 257);
+f(33489407, 511);
+f(33554944, 512);
+f(33620481, 513);
+f(67044351, 1023);
+f(67109888, 1024);
+f(67175425, 1025);
+f(134154239, 2047);
+f(134219776, 2048);
+f(134285313, 2049);
+f(268374015, 4095);
+f(268439552, 4096);
+f(268505089, 4097);
+f(536813567, 8191);
+f(536879104, 8192);
+f(536944641, 8193);
+f(1073692671, 16383);
+f(1073758208, 16384);
+f(1073823745, 16385);
+f(2147450879, 32767);
+f(2147516416, 32768);
+f(2147581953, 32769);
+f(4294967295, 65535);
+f(4295032832, 65536);
+f(4295098369, 65537);
+x = 131071;
+f(0, 0);
+f(131071, 1);
+f(262142, 2);
+f(393213, 3);
+f(524284, 4);
+f(655355, 5);
+f(917497, 7);
+f(1048568, 8);
+f(1179639, 9);
+f(1966065, 15);
+f(2097136, 16);
+f(2228207, 17);
+f(4063201, 31);
+f(4194272, 32);
+f(4325343, 33);
+f(8257473, 63);
+f(8388544, 64);
+f(8519615, 65);
+f(16646017, 127);
+f(16777088, 128);
+f(16908159, 129);
+f(33423105, 255);
+f(33554176, 256);
+f(33685247, 257);
+f(66977281, 511);
+f(67108352, 512);
+f(67239423, 513);
+f(134085633, 1023);
+f(134216704, 1024);
+f(134347775, 1025);
+f(268302337, 2047);
+f(268433408, 2048);
+f(268564479, 2049);
+f(536735745, 4095);
+f(536866816, 4096);
+f(536997887, 4097);
+f(1073602561, 8191);
+f(1073733632, 8192);
+f(1073864703, 8193);
+f(2147336193, 16383);
+f(2147467264, 16384);
+f(2147598335, 16385);
+f(4294803457, 32767);
+f(4294934528, 32768);
+f(4295065599, 32769);
+f(8589737985, 65535);
+f(8589869056, 65536);
+f(8590000127, 65537);
+f(17179607041, 131071);
+x = 131072;
+f(0, 0);
+f(131072, 1);
+f(262144, 2);
+f(393216, 3);
+f(524288, 4);
+f(655360, 5);
+f(917504, 7);
+f(1048576, 8);
+f(1179648, 9);
+f(1966080, 15);
+f(2097152, 16);
+f(2228224, 17);
+f(4063232, 31);
+f(4194304, 32);
+f(4325376, 33);
+f(8257536, 63);
+f(8388608, 64);
+f(8519680, 65);
+f(16646144, 127);
+f(16777216, 128);
+f(16908288, 129);
+f(33423360, 255);
+f(33554432, 256);
+f(33685504, 257);
+f(66977792, 511);
+f(67108864, 512);
+f(67239936, 513);
+f(134086656, 1023);
+f(134217728, 1024);
+f(134348800, 1025);
+f(268304384, 2047);
+f(268435456, 2048);
+f(268566528, 2049);
+f(536739840, 4095);
+f(536870912, 4096);
+f(537001984, 4097);
+f(1073610752, 8191);
+f(1073741824, 8192);
+f(1073872896, 8193);
+f(2147352576, 16383);
+f(2147483648, 16384);
+f(2147614720, 16385);
+f(4294836224, 32767);
+f(4294967296, 32768);
+f(4295098368, 32769);
+f(8589803520, 65535);
+f(8589934592, 65536);
+f(8590065664, 65537);
+f(17179738112, 131071);
+f(17179869184, 131072);
+x = 131073;
+f(0, 0);
+f(131073, 1);
+f(262146, 2);
+f(393219, 3);
+f(524292, 4);
+f(655365, 5);
+f(917511, 7);
+f(1048584, 8);
+f(1179657, 9);
+f(1966095, 15);
+f(2097168, 16);
+f(2228241, 17);
+f(4063263, 31);
+f(4194336, 32);
+f(4325409, 33);
+f(8257599, 63);
+f(8388672, 64);
+f(8519745, 65);
+f(16646271, 127);
+f(16777344, 128);
+f(16908417, 129);
+f(33423615, 255);
+f(33554688, 256);
+f(33685761, 257);
+f(66978303, 511);
+f(67109376, 512);
+f(67240449, 513);
+f(134087679, 1023);
+f(134218752, 1024);
+f(134349825, 1025);
+f(268306431, 2047);
+f(268437504, 2048);
+f(268568577, 2049);
+f(536743935, 4095);
+f(536875008, 4096);
+f(537006081, 4097);
+f(1073618943, 8191);
+f(1073750016, 8192);
+f(1073881089, 8193);
+f(2147368959, 16383);
+f(2147500032, 16384);
+f(2147631105, 16385);
+f(4294868991, 32767);
+f(4295000064, 32768);
+f(4295131137, 32769);
+f(8589869055, 65535);
+f(8590000128, 65536);
+f(8590131201, 65537);
+f(17179869183, 131071);
+f(17180000256, 131072);
+f(17180131329, 131073);
diff --git a/deps/v8/test/mjsunit/mul-exhaustive-part4.js b/deps/v8/test/mjsunit/mul-exhaustive-part4.js
new file mode 100644
index 0000000000..de9f9835b2
--- /dev/null
+++ b/deps/v8/test/mjsunit/mul-exhaustive-part4.js
@@ -0,0 +1,509 @@
+// Copyright 2008 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+var x;
+
+// Converts a number to string respecting -0.
+function stringify(n) {
+  if ((1 / n) === -Infinity) return "-0";
+  return String(n);
+}
+
+function f(expected, y) {
+  function testEval(string, x, y) {
+    var mulFunction = Function("x, y", "return " + string);
+    return mulFunction(x, y);
+  }
+  function mulTest(expected, x, y) {
+    assertEquals(expected, x * y);
+    assertEquals(expected, testEval(stringify(x) + " * y", x, y));
+    assertEquals(expected, testEval("x * " + stringify(y), x, y));
+    assertEquals(expected, testEval(stringify(x) + " * " + stringify(y), x, y));
+  }
+  mulTest(expected, x, y);
+  mulTest(-expected, -x, y);
+  mulTest(-expected, x, -y);
+  mulTest(expected, -x, -y);
+  if (x === y) return;  // Symmetric cases not necessary.
+  mulTest(expected, y, x);
+  mulTest(-expected, -y, x);
+  mulTest(-expected, y, -x);
+  mulTest(expected, -y, -x);
+}
+
+x = 262143;
+f(0, 0);
+f(262143, 1);
+f(524286, 2);
+f(786429, 3);
+f(1048572, 4);
+f(1310715, 5);
+f(1835001, 7);
+f(2097144, 8);
+f(2359287, 9);
+f(3932145, 15);
+f(4194288, 16);
+f(4456431, 17);
+f(8126433, 31);
+f(8388576, 32);
+f(8650719, 33);
+f(16515009, 63);
+f(16777152, 64);
+f(17039295, 65);
+f(33292161, 127);
+f(33554304, 128);
+f(33816447, 129);
+f(66846465, 255);
+f(67108608, 256);
+f(67370751, 257);
+f(133955073, 511);
+f(134217216, 512);
+f(134479359, 513);
+f(268172289, 1023);
+f(268434432, 1024);
+f(268696575, 1025);
+f(536606721, 2047);
+f(536868864, 2048);
+f(537131007, 2049);
+f(1073475585, 4095);
+f(1073737728, 4096);
+f(1073999871, 4097);
+f(2147213313, 8191);
+f(2147475456, 8192);
+f(2147737599, 8193);
+f(4294688769, 16383);
+f(4294950912, 16384);
+f(4295213055, 16385);
+f(8589639681, 32767);
+f(8589901824, 32768);
+f(8590163967, 32769);
+f(17179541505, 65535);
+f(17179803648, 65536);
+f(17180065791, 65537);
+f(34359345153, 131071);
+f(34359607296, 131072);
+f(34359869439, 131073);
+f(68718952449, 262143);
+x = 262144;
+f(0, 0);
+f(262144, 1);
+f(524288, 2);
+f(786432, 3);
+f(1048576, 4);
+f(1310720, 5);
+f(1835008, 7);
+f(2097152, 8);
+f(2359296, 9);
+f(3932160, 15);
+f(4194304, 16);
+f(4456448, 17);
+f(8126464, 31);
+f(8388608, 32);
+f(8650752, 33);
+f(16515072, 63);
+f(16777216, 64);
+f(17039360, 65);
+f(33292288, 127);
+f(33554432, 128);
+f(33816576, 129);
+f(66846720, 255);
+f(67108864, 256);
+f(67371008, 257);
+f(133955584, 511);
+f(134217728, 512);
+f(134479872, 513);
+f(268173312, 1023);
+f(268435456, 1024);
+f(268697600, 1025);
+f(536608768, 2047);
+f(536870912, 2048);
+f(537133056, 2049);
+f(1073479680, 4095);
+f(1073741824, 4096);
+f(1074003968, 4097);
+f(2147221504, 8191);
+f(2147483648, 8192);
+f(2147745792, 8193);
+f(4294705152, 16383);
+f(4294967296, 16384);
+f(4295229440, 16385);
+f(8589672448, 32767);
+f(8589934592, 32768);
+f(8590196736, 32769);
+f(17179607040, 65535);
+f(17179869184, 65536);
+f(17180131328, 65537);
+f(34359476224, 131071);
+f(34359738368, 131072);
+f(34360000512, 131073);
+f(68719214592, 262143);
+f(68719476736, 262144);
+x = 262145;
+f(0, 0);
+f(262145, 1);
+f(524290, 2);
+f(786435, 3);
+f(1048580, 4);
+f(1310725, 5);
+f(1835015, 7);
+f(2097160, 8);
+f(2359305, 9);
+f(3932175, 15);
+f(4194320, 16);
+f(4456465, 17);
+f(8126495, 31);
+f(8388640, 32);
+f(8650785, 33);
+f(16515135, 63);
+f(16777280, 64);
+f(17039425, 65);
+f(33292415, 127);
+f(33554560, 128);
+f(33816705, 129);
+f(66846975, 255);
+f(67109120, 256);
+f(67371265, 257);
+f(133956095, 511);
+f(134218240, 512);
+f(134480385, 513);
+f(268174335, 1023);
+f(268436480, 1024);
+f(268698625, 1025);
+f(536610815, 2047);
+f(536872960, 2048);
+f(537135105, 2049);
+f(1073483775, 4095);
+f(1073745920, 4096);
+f(1074008065, 4097);
+f(2147229695, 8191);
+f(2147491840, 8192);
+f(2147753985, 8193);
+f(4294721535, 16383);
+f(4294983680, 16384);
+f(4295245825, 16385);
+f(8589705215, 32767);
+f(8589967360, 32768);
+f(8590229505, 32769);
+f(17179672575, 65535);
+f(17179934720, 65536);
+f(17180196865, 65537);
+f(34359607295, 131071);
+f(34359869440, 131072);
+f(34360131585, 131073);
+f(68719476735, 262143);
+f(68719738880, 262144);
+f(68720001025, 262145);
+x = 524287;
+f(0, 0);
+f(524287, 1);
+f(1048574, 2);
+f(1572861, 3);
+f(2097148, 4);
+f(2621435, 5);
+f(3670009, 7);
+f(4194296, 8);
+f(4718583, 9);
+f(7864305, 15);
+f(8388592, 16);
+f(8912879, 17);
+f(16252897, 31);
+f(16777184, 32);
+f(17301471, 33);
+f(33030081, 63);
+f(33554368, 64);
+f(34078655, 65);
+f(66584449, 127);
+f(67108736, 128);
+f(67633023, 129);
+f(133693185, 255);
+f(134217472, 256);
+f(134741759, 257);
+f(267910657, 511);
+f(268434944, 512);
+f(268959231, 513);
+f(536345601, 1023);
+f(536869888, 1024);
+f(537394175, 1025);
+f(1073215489, 2047);
+f(1073739776, 2048);
+f(1074264063, 2049);
+f(2146955265, 4095);
+f(2147479552, 4096);
+f(2148003839, 4097);
+f(4294434817, 8191);
+f(4294959104, 8192);
+f(4295483391, 8193);
+f(8589393921, 16383);
+f(8589918208, 16384);
+f(8590442495, 16385);
+f(17179312129, 32767);
+f(17179836416, 32768);
+f(17180360703, 32769);
+f(34359148545, 65535);
+f(34359672832, 65536);
+f(34360197119, 65537);
+f(68718821377, 131071);
+f(68719345664, 131072);
+f(68719869951, 131073);
+f(137438167041, 262143);
+f(137438691328, 262144);
+f(137439215615, 262145);
+f(274876858369, 524287);
+x = 524288;
+f(0, 0);
+f(524288, 1);
+f(1048576, 2);
+f(1572864, 3);
+f(2097152, 4);
+f(2621440, 5);
+f(3670016, 7);
+f(4194304, 8);
+f(4718592, 9);
+f(7864320, 15);
+f(8388608, 16);
+f(8912896, 17);
+f(16252928, 31);
+f(16777216, 32);
+f(17301504, 33);
+f(33030144, 63);
+f(33554432, 64);
+f(34078720, 65);
+f(66584576, 127);
+f(67108864, 128);
+f(67633152, 129);
+f(133693440, 255);
+f(134217728, 256);
+f(134742016, 257);
+f(267911168, 511);
+f(268435456, 512);
+f(268959744, 513);
+f(536346624, 1023);
+f(536870912, 1024);
+f(537395200, 1025);
+f(1073217536, 2047);
+f(1073741824, 2048);
+f(1074266112, 2049);
+f(2146959360, 4095);
+f(2147483648, 4096);
+f(2148007936, 4097);
+f(4294443008, 8191);
+f(4294967296, 8192);
+f(4295491584, 8193);
+f(8589410304, 16383);
+f(8589934592, 16384);
+f(8590458880, 16385);
+f(17179344896, 32767);
+f(17179869184, 32768);
+f(17180393472, 32769);
+f(34359214080, 65535);
+f(34359738368, 65536);
+f(34360262656, 65537);
+f(68718952448, 131071);
+f(68719476736, 131072);
+f(68720001024, 131073);
+f(137438429184, 262143);
+f(137438953472, 262144);
+f(137439477760, 262145);
+f(274877382656, 524287);
+f(274877906944, 524288);
+x = 524289;
+f(0, 0);
+f(524289, 1);
+f(1048578, 2);
+f(1572867, 3);
+f(2097156, 4);
+f(2621445, 5);
+f(3670023, 7);
+f(4194312, 8);
+f(4718601, 9);
+f(7864335, 15);
+f(8388624, 16);
+f(8912913, 17);
+f(16252959, 31);
+f(16777248, 32);
+f(17301537, 33);
+f(33030207, 63);
+f(33554496, 64);
+f(34078785, 65);
+f(66584703, 127);
+f(67108992, 128);
+f(67633281, 129);
+f(133693695, 255);
+f(134217984, 256);
+f(134742273, 257);
+f(267911679, 511);
+f(268435968, 512);
+f(268960257, 513);
+f(536347647, 1023);
+f(536871936, 1024);
+f(537396225, 1025);
+f(1073219583, 2047);
+f(1073743872, 2048);
+f(1074268161, 2049);
+f(2146963455, 4095);
+f(2147487744, 4096);
+f(2148012033, 4097);
+f(4294451199, 8191);
+f(4294975488, 8192);
+f(4295499777, 8193);
+f(8589426687, 16383);
+f(8589950976, 16384);
+f(8590475265, 16385);
+f(17179377663, 32767);
+f(17179901952, 32768);
+f(17180426241, 32769);
+f(34359279615, 65535);
+f(34359803904, 65536);
+f(34360328193, 65537);
+f(68719083519, 131071);
+f(68719607808, 131072);
+f(68720132097, 131073);
+f(137438691327, 262143);
+f(137439215616, 262144);
+f(137439739905, 262145);
+f(274877906943, 524287);
+f(274878431232, 524288);
+f(274878955521, 524289);
+x = 1048575;
+f(0, 0);
+f(1048575, 1);
+f(2097150, 2);
+f(3145725, 3);
+f(4194300, 4);
+f(5242875, 5);
+f(7340025, 7);
+f(8388600, 8);
+f(9437175, 9);
+f(15728625, 15);
+f(16777200, 16);
+f(17825775, 17);
+f(32505825, 31);
+f(33554400, 32);
+f(34602975, 33);
+f(66060225, 63);
+f(67108800, 64);
+f(68157375, 65);
+f(133169025, 127);
+f(134217600, 128);
+f(135266175, 129);
+f(267386625, 255);
+f(268435200, 256);
+f(269483775, 257);
+f(535821825, 511);
+f(536870400, 512);
+f(537918975, 513);
+f(1072692225, 1023);
+f(1073740800, 1024);
+f(1074789375, 1025);
+f(2146433025, 2047);
+f(2147481600, 2048);
+f(2148530175, 2049);
+f(4293914625, 4095);
+f(4294963200, 4096);
+f(4296011775, 4097);
+f(8588877825, 8191);
+f(8589926400, 8192);
+f(8590974975, 8193);
+f(17178804225, 16383);
+f(17179852800, 16384);
+f(17180901375, 16385);
+f(34358657025, 32767);
+f(34359705600, 32768);
+f(34360754175, 32769);
+f(68718362625, 65535);
+f(68719411200, 65536);
+f(68720459775, 65537);
+f(137437773825, 131071);
+f(137438822400, 131072);
+f(137439870975, 131073);
+f(274876596225, 262143);
+f(274877644800, 262144);
+f(274878693375, 262145);
+f(549754241025, 524287);
+f(549755289600, 524288);
+f(549756338175, 524289);
+f(1099509530625, 1048575);
+x = 1048576;
+f(0, 0);
+f(1048576, 1);
+f(2097152, 2);
+f(3145728, 3);
+f(4194304, 4);
+f(5242880, 5);
+f(7340032, 7);
+f(8388608, 8);
+f(9437184, 9);
+f(15728640, 15);
+f(16777216, 16);
+f(17825792, 17);
+f(32505856, 31);
+f(33554432, 32);
+f(34603008, 33);
+f(66060288, 63);
+f(67108864, 64);
+f(68157440, 65);
+f(133169152, 127);
+f(134217728, 128);
+f(135266304, 129);
+f(267386880, 255);
+f(268435456, 256);
+f(269484032, 257);
+f(535822336, 511);
+f(536870912, 512);
+f(537919488, 513);
+f(1072693248, 1023);
+f(1073741824, 1024);
+f(1074790400, 1025);
+f(2146435072, 2047);
+f(2147483648, 2048);
+f(2148532224, 2049);
+f(4293918720, 4095);
+f(4294967296, 4096);
+f(4296015872, 4097);
+f(8588886016, 8191);
+f(8589934592, 8192);
+f(8590983168, 8193);
+f(17178820608, 16383);
+f(17179869184, 16384);
+f(17180917760, 16385);
+f(34358689792, 32767);
+f(34359738368, 32768);
+f(34360786944, 32769);
+f(68718428160, 65535);
+f(68719476736, 65536);
+f(68720525312, 65537);
+f(137437904896, 131071);
+f(137438953472, 131072);
+f(137440002048, 131073);
+f(274876858368, 262143);
+f(274877906944, 262144);
+f(274878955520, 262145);
+f(549754765312, 524287);
+f(549755813888, 524288);
+f(549756862464, 524289);
+f(1099510579200, 1048575);
+f(1099511627776, 1048576);
diff --git a/deps/v8/test/mjsunit/mul-exhaustive-part5.js b/deps/v8/test/mjsunit/mul-exhaustive-part5.js
new file mode 100644
index 0000000000..e92998575b
--- /dev/null
+++ b/deps/v8/test/mjsunit/mul-exhaustive-part5.js
@@ -0,0 +1,505 @@
+// Copyright 2008 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+var x;
+
+// Converts a number to string respecting -0.
+function stringify(n) {
+  if ((1 / n) === -Infinity) return "-0";
+  return String(n);
+}
+
+function f(expected, y) {
+  function testEval(string, x, y) {
+    var mulFunction = Function("x, y", "return " + string);
+    return mulFunction(x, y);
+  }
+  function mulTest(expected, x, y) {
+    assertEquals(expected, x * y);
+    assertEquals(expected, testEval(stringify(x) + " * y", x, y));
+    assertEquals(expected, testEval("x * " + stringify(y), x, y));
+    assertEquals(expected, testEval(stringify(x) + " * " + stringify(y), x, y));
+  }
+  mulTest(expected, x, y);
+  mulTest(-expected, -x, y);
+  mulTest(-expected, x, -y);
+  mulTest(expected, -x, -y);
+  if (x === y) return;  // Symmetric cases not necessary.
+  mulTest(expected, y, x);
+  mulTest(-expected, -y, x);
+  mulTest(-expected, y, -x);
+  mulTest(expected, -y, -x);
+}
+
+x = 1048577;
+f(0, 0);
+f(1048577, 1);
+f(2097154, 2);
+f(3145731, 3);
+f(4194308, 4);
+f(5242885, 5);
+f(7340039, 7);
+f(8388616, 8);
+f(9437193, 9);
+f(15728655, 15);
+f(16777232, 16);
+f(17825809, 17);
+f(32505887, 31);
+f(33554464, 32);
+f(34603041, 33);
+f(66060351, 63);
+f(67108928, 64);
+f(68157505, 65);
+f(133169279, 127);
+f(134217856, 128);
+f(135266433, 129);
+f(267387135, 255);
+f(268435712, 256);
+f(269484289, 257);
+f(535822847, 511);
+f(536871424, 512);
+f(537920001, 513);
+f(1072694271, 1023);
+f(1073742848, 1024);
+f(1074791425, 1025);
+f(2146437119, 2047);
+f(2147485696, 2048);
+f(2148534273, 2049);
+f(4293922815, 4095);
+f(4294971392, 4096);
+f(4296019969, 4097);
+f(8588894207, 8191);
+f(8589942784, 8192);
+f(8590991361, 8193);
+f(17178836991, 16383);
+f(17179885568, 16384);
+f(17180934145, 16385);
+f(34358722559, 32767);
+f(34359771136, 32768);
+f(34360819713, 32769);
+f(68718493695, 65535);
+f(68719542272, 65536);
+f(68720590849, 65537);
+f(137438035967, 131071);
+f(137439084544, 131072);
+f(137440133121, 131073);
+f(274877120511, 262143);
+f(274878169088, 262144);
+f(274879217665, 262145);
+f(549755289599, 524287);
+f(549756338176, 524288);
+f(549757386753, 524289);
+f(1099511627775, 1048575);
+f(1099512676352, 1048576);
+f(1099513724929, 1048577);
+x = 2097151;
+f(0, 0);
+f(2097151, 1);
+f(4194302, 2);
+f(6291453, 3);
+f(8388604, 4);
+f(10485755, 5);
+f(14680057, 7);
+f(16777208, 8);
+f(18874359, 9);
+f(31457265, 15);
+f(33554416, 16);
+f(35651567, 17);
+f(65011681, 31);
+f(67108832, 32);
+f(69205983, 33);
+f(132120513, 63);
+f(134217664, 64);
+f(136314815, 65);
+f(266338177, 127);
+f(268435328, 128);
+f(270532479, 129);
+f(534773505, 255);
+f(536870656, 256);
+f(538967807, 257);
+f(1071644161, 511);
+f(1073741312, 512);
+f(1075838463, 513);
+f(2145385473, 1023);
+f(2147482624, 1024);
+f(2149579775, 1025);
+f(4292868097, 2047);
+f(4294965248, 2048);
+f(4297062399, 2049);
+f(8587833345, 4095);
+f(8589930496, 4096);
+f(8592027647, 4097);
+f(17177763841, 8191);
+f(17179860992, 8192);
+f(17181958143, 8193);
+f(34357624833, 16383);
+f(34359721984, 16384);
+f(34361819135, 16385);
+f(68717346817, 32767);
+f(68719443968, 32768);
+f(68721541119, 32769);
+f(137436790785, 65535);
+f(137438887936, 65536);
+f(137440985087, 65537);
+f(274875678721, 131071);
+f(274877775872, 131072);
+f(274879873023, 131073);
+f(549753454593, 262143);
+f(549755551744, 262144);
+f(549757648895, 262145);
+f(1099509006337, 524287);
+f(1099511103488, 524288);
+f(1099513200639, 524289);
+f(2199020109825, 1048575);
+f(2199022206976, 1048576);
+f(2199024304127, 1048577);
+f(4398042316801, 2097151);
+x = 2097152;
+f(0, 0);
+f(2097152, 1);
+f(4194304, 2);
+f(6291456, 3);
+f(8388608, 4);
+f(10485760, 5);
+f(14680064, 7);
+f(16777216, 8);
+f(18874368, 9);
+f(31457280, 15);
+f(33554432, 16);
+f(35651584, 17);
+f(65011712, 31);
+f(67108864, 32);
+f(69206016, 33);
+f(132120576, 63);
+f(134217728, 64);
+f(136314880, 65);
+f(266338304, 127);
+f(268435456, 128);
+f(270532608, 129);
+f(534773760, 255);
+f(536870912, 256);
+f(538968064, 257);
+f(1071644672, 511);
+f(1073741824, 512);
+f(1075838976, 513);
+f(2145386496, 1023);
+f(2147483648, 1024);
+f(2149580800, 1025);
+f(4292870144, 2047);
+f(4294967296, 2048);
+f(4297064448, 2049);
+f(8587837440, 4095);
+f(8589934592, 4096);
+f(8592031744, 4097);
+f(17177772032, 8191);
+f(17179869184, 8192);
+f(17181966336, 8193);
+f(34357641216, 16383);
+f(34359738368, 16384);
+f(34361835520, 16385);
+f(68717379584, 32767);
+f(68719476736, 32768);
+f(68721573888, 32769);
+f(137436856320, 65535);
+f(137438953472, 65536);
+f(137441050624, 65537);
+f(274875809792, 131071);
+f(274877906944, 131072);
+f(274880004096, 131073);
+f(549753716736, 262143);
+f(549755813888, 262144);
+f(549757911040, 262145);
+f(1099509530624, 524287);
+f(1099511627776, 524288);
+f(1099513724928, 524289);
+f(2199021158400, 1048575);
+f(2199023255552, 1048576);
+f(2199025352704, 1048577);
+f(4398044413952, 2097151);
+f(4398046511104, 2097152);
+x = 2097153;
+f(0, 0);
+f(2097153, 1);
+f(4194306, 2);
+f(6291459, 3);
+f(8388612, 4);
+f(10485765, 5);
+f(14680071, 7);
+f(16777224, 8);
+f(18874377, 9);
+f(31457295, 15);
+f(33554448, 16);
+f(35651601, 17);
+f(65011743, 31);
+f(67108896, 32);
+f(69206049, 33);
+f(132120639, 63);
+f(134217792, 64);
+f(136314945, 65);
+f(266338431, 127);
+f(268435584, 128);
+f(270532737, 129);
+f(534774015, 255);
+f(536871168, 256);
+f(538968321, 257);
+f(1071645183, 511);
+f(1073742336, 512);
+f(1075839489, 513);
+f(2145387519, 1023);
+f(2147484672, 1024);
+f(2149581825, 1025);
+f(4292872191, 2047);
+f(4294969344, 2048);
+f(4297066497, 2049);
+f(8587841535, 4095);
+f(8589938688, 4096);
+f(8592035841, 4097);
+f(17177780223, 8191);
+f(17179877376, 8192);
+f(17181974529, 8193);
+f(34357657599, 16383);
+f(34359754752, 16384);
+f(34361851905, 16385);
+f(68717412351, 32767);
+f(68719509504, 32768);
+f(68721606657, 32769);
+f(137436921855, 65535);
+f(137439019008, 65536);
+f(137441116161, 65537);
+f(274875940863, 131071);
+f(274878038016, 131072);
+f(274880135169, 131073);
+f(549753978879, 262143);
+f(549756076032, 262144);
+f(549758173185, 262145);
+f(1099510054911, 524287);
+f(1099512152064, 524288);
+f(1099514249217, 524289);
+f(2199022206975, 1048575);
+f(2199024304128, 1048576);
+f(2199026401281, 1048577);
+f(4398046511103, 2097151);
+f(4398048608256, 2097152);
+f(4398050705409, 2097153);
+x = 4194303;
+f(0, 0);
+f(4194303, 1);
+f(8388606, 2);
+f(12582909, 3);
+f(16777212, 4);
+f(20971515, 5);
+f(29360121, 7);
+f(33554424, 8);
+f(37748727, 9);
+f(62914545, 15);
+f(67108848, 16);
+f(71303151, 17);
+f(130023393, 31);
+f(134217696, 32);
+f(138411999, 33);
+f(264241089, 63);
+f(268435392, 64);
+f(272629695, 65);
+f(532676481, 127);
+f(536870784, 128);
+f(541065087, 129);
+f(1069547265, 255);
+f(1073741568, 256);
+f(1077935871, 257);
+f(2143288833, 511);
+f(2147483136, 512);
+f(2151677439, 513);
+f(4290771969, 1023);
+f(4294966272, 1024);
+f(4299160575, 1025);
+f(8585738241, 2047);
+f(8589932544, 2048);
+f(8594126847, 2049);
+f(17175670785, 4095);
+f(17179865088, 4096);
+f(17184059391, 4097);
+f(34355535873, 8191);
+f(34359730176, 8192);
+f(34363924479, 8193);
+f(68715266049, 16383);
+f(68719460352, 16384);
+f(68723654655, 16385);
+f(137434726401, 32767);
+f(137438920704, 32768);
+f(137443115007, 32769);
+f(274873647105, 65535);
+f(274877841408, 65536);
+f(274882035711, 65537);
+f(549751488513, 131071);
+f(549755682816, 131072);
+f(549759877119, 131073);
+f(1099507171329, 262143);
+f(1099511365632, 262144);
+f(1099515559935, 262145);
+f(2199018536961, 524287);
+f(2199022731264, 524288);
+f(2199026925567, 524289);
+f(4398041268225, 1048575);
+f(4398045462528, 1048576);
+f(4398049656831, 1048577);
+f(8796086730753, 2097151);
+f(8796090925056, 2097152);
+f(8796095119359, 2097153);
+f(17592177655809, 4194303);
+x = 4194304;
+f(0, 0);
+f(4194304, 1);
+f(8388608, 2);
+f(12582912, 3);
+f(16777216, 4);
+f(20971520, 5);
+f(29360128, 7);
+f(33554432, 8);
+f(37748736, 9);
+f(62914560, 15);
+f(67108864, 16);
+f(71303168, 17);
+f(130023424, 31);
+f(134217728, 32);
+f(138412032, 33);
+f(264241152, 63);
+f(268435456, 64);
+f(272629760, 65);
+f(532676608, 127);
+f(536870912, 128);
+f(541065216, 129);
+f(1069547520, 255);
+f(1073741824, 256);
+f(1077936128, 257);
+f(2143289344, 511);
+f(2147483648, 512);
+f(2151677952, 513);
+f(4290772992, 1023);
+f(4294967296, 1024);
+f(4299161600, 1025);
+f(8585740288, 2047);
+f(8589934592, 2048);
+f(8594128896, 2049);
+f(17175674880, 4095);
+f(17179869184, 4096);
+f(17184063488, 4097);
+f(34355544064, 8191);
+f(34359738368, 8192);
+f(34363932672, 8193);
+f(68715282432, 16383);
+f(68719476736, 16384);
+f(68723671040, 16385);
+f(137434759168, 32767);
+f(137438953472, 32768);
+f(137443147776, 32769);
+f(274873712640, 65535);
+f(274877906944, 65536);
+f(274882101248, 65537);
+f(549751619584, 131071);
+f(549755813888, 131072);
+f(549760008192, 131073);
+f(1099507433472, 262143);
+f(1099511627776, 262144);
+f(1099515822080, 262145);
+f(2199019061248, 524287);
+f(2199023255552, 524288);
+f(2199027449856, 524289);
+f(4398042316800, 1048575);
+f(4398046511104, 1048576);
+f(4398050705408, 1048577);
+f(8796088827904, 2097151);
+f(8796093022208, 2097152);
+f(8796097216512, 2097153);
+f(17592181850112, 4194303);
+f(17592186044416, 4194304);
+x = 4194305;
+f(0, 0);
+f(4194305, 1);
+f(8388610, 2);
+f(12582915, 3);
+f(16777220, 4);
+f(20971525, 5);
+f(29360135, 7);
+f(33554440, 8);
+f(37748745, 9);
+f(62914575, 15);
+f(67108880, 16);
+f(71303185, 17);
+f(130023455, 31);
+f(134217760, 32);
+f(138412065, 33);
+f(264241215, 63);
+f(268435520, 64);
+f(272629825, 65);
+f(532676735, 127);
+f(536871040, 128);
+f(541065345, 129);
+f(1069547775, 255);
+f(1073742080, 256);
+f(1077936385, 257);
+f(2143289855, 511);
+f(2147484160, 512);
+f(2151678465, 513);
+f(4290774015, 1023);
+f(4294968320, 1024);
+f(4299162625, 1025);
+f(8585742335, 2047);
+f(8589936640, 2048);
+f(8594130945, 2049);
+f(17175678975, 4095);
+f(17179873280, 4096);
+f(17184067585, 4097);
+f(34355552255, 8191);
+f(34359746560, 8192);
+f(34363940865, 8193);
+f(68715298815, 16383);
+f(68719493120, 16384);
+f(68723687425, 16385);
+f(137434791935, 32767);
+f(137438986240, 32768);
+f(137443180545, 32769);
+f(274873778175, 65535);
+f(274877972480, 65536);
+f(274882166785, 65537);
+f(549751750655, 131071);
+f(549755944960, 131072);
+f(549760139265, 131073);
+f(1099507695615, 262143);
+f(1099511889920, 262144);
+f(1099516084225, 262145);
+f(2199019585535, 524287);
+f(2199023779840, 524288);
+f(2199027974145, 524289);
+f(4398043365375, 1048575);
+f(4398047559680, 1048576);
+f(4398051753985, 1048577);
+f(8796090925055, 2097151);
+f(8796095119360, 2097152);
+f(8796099313665, 2097153);
+f(17592186044415, 4194303);
+f(17592190238720, 4194304);
+f(17592194433025, 4194305);
diff --git a/deps/v8/test/mjsunit/mul-exhaustive-part6.js b/deps/v8/test/mjsunit/mul-exhaustive-part6.js
new file mode 100644
index 0000000000..91cb798a7d
--- /dev/null
+++ b/deps/v8/test/mjsunit/mul-exhaustive-part6.js
@@ -0,0 +1,554 @@
+// Copyright 2008 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+var x;
+
+// Converts a number to string respecting -0.
+function stringify(n) {
+  if ((1 / n) === -Infinity) return "-0";
+  return String(n);
+}
+
+function f(expected, y) {
+  function testEval(string, x, y) {
+    var mulFunction = Function("x, y", "return " + string);
+    return mulFunction(x, y);
+  }
+  function mulTest(expected, x, y) {
+    assertEquals(expected, x * y);
+    assertEquals(expected, testEval(stringify(x) + " * y", x, y));
+    assertEquals(expected, testEval("x * " + stringify(y), x, y));
+    assertEquals(expected, testEval(stringify(x) + " * " + stringify(y), x, y));
+  }
+  mulTest(expected, x, y);
+  mulTest(-expected, -x, y);
+  mulTest(-expected, x, -y);
+  mulTest(expected, -x, -y);
+  if (x === y) return;  // Symmetric cases not necessary.
+  mulTest(expected, y, x);
+  mulTest(-expected, -y, x);
+  mulTest(-expected, y, -x);
+  mulTest(expected, -y, -x);
+}
+
+x = 8388607;
+f(0, 0);
+f(8388607, 1);
+f(16777214, 2);
+f(25165821, 3);
+f(33554428, 4);
+f(41943035, 5);
+f(58720249, 7);
+f(67108856, 8);
+f(75497463, 9);
+f(125829105, 15);
+f(134217712, 16);
+f(142606319, 17);
+f(260046817, 31);
+f(268435424, 32);
+f(276824031, 33);
+f(528482241, 63);
+f(536870848, 64);
+f(545259455, 65);
+f(1065353089, 127);
+f(1073741696, 128);
+f(1082130303, 129);
+f(2139094785, 255);
+f(2147483392, 256);
+f(2155871999, 257);
+f(4286578177, 511);
+f(4294966784, 512);
+f(4303355391, 513);
+f(8581544961, 1023);
+f(8589933568, 1024);
+f(8598322175, 1025);
+f(17171478529, 2047);
+f(17179867136, 2048);
+f(17188255743, 2049);
+f(34351345665, 4095);
+f(34359734272, 4096);
+f(34368122879, 4097);
+f(68711079937, 8191);
+f(68719468544, 8192);
+f(68727857151, 8193);
+f(137430548481, 16383);
+f(137438937088, 16384);
+f(137447325695, 16385);
+f(274869485569, 32767);
+f(274877874176, 32768);
+f(274886262783, 32769);
+f(549747359745, 65535);
+f(549755748352, 65536);
+f(549764136959, 65537);
+f(1099503108097, 131071);
+f(1099511496704, 131072);
+f(1099519885311, 131073);
+f(2199014604801, 262143);
+f(2199022993408, 262144);
+f(2199031382015, 262145);
+f(4398037598209, 524287);
+f(4398045986816, 524288);
+f(4398054375423, 524289);
+f(8796083585025, 1048575);
+f(8796091973632, 1048576);
+f(8796100362239, 1048577);
+f(17592175558657, 2097151);
+f(17592183947264, 2097152);
+f(17592192335871, 2097153);
+f(35184359505921, 4194303);
+f(35184367894528, 4194304);
+f(35184376283135, 4194305);
+f(70368727400449, 8388607);
+x = 8388608;
+f(0, 0);
+f(8388608, 1);
+f(16777216, 2);
+f(25165824, 3);
+f(33554432, 4);
+f(41943040, 5);
+f(58720256, 7);
+f(67108864, 8);
+f(75497472, 9);
+f(125829120, 15);
+f(134217728, 16);
+f(142606336, 17);
+f(260046848, 31);
+f(268435456, 32);
+f(276824064, 33);
+f(528482304, 63);
+f(536870912, 64);
+f(545259520, 65);
+f(1065353216, 127);
+f(1073741824, 128);
+f(1082130432, 129);
+f(2139095040, 255);
+f(2147483648, 256);
+f(2155872256, 257);
+f(4286578688, 511);
+f(4294967296, 512);
+f(4303355904, 513);
+f(8581545984, 1023);
+f(8589934592, 1024);
+f(8598323200, 1025);
+f(17171480576, 2047);
+f(17179869184, 2048);
+f(17188257792, 2049);
+f(34351349760, 4095);
+f(34359738368, 4096);
+f(34368126976, 4097);
+f(68711088128, 8191);
+f(68719476736, 8192);
+f(68727865344, 8193);
+f(137430564864, 16383);
+f(137438953472, 16384);
+f(137447342080, 16385);
+f(274869518336, 32767);
+f(274877906944, 32768);
+f(274886295552, 32769);
+f(549747425280, 65535);
+f(549755813888, 65536);
+f(549764202496, 65537);
+f(1099503239168, 131071);
+f(1099511627776, 131072);
+f(1099520016384, 131073);
+f(2199014866944, 262143);
+f(2199023255552, 262144);
+f(2199031644160, 262145);
+f(4398038122496, 524287);
+f(4398046511104, 524288);
+f(4398054899712, 524289);
+f(8796084633600, 1048575);
+f(8796093022208, 1048576);
+f(8796101410816, 1048577);
+f(17592177655808, 2097151);
+f(17592186044416, 2097152);
+f(17592194433024, 2097153);
+f(35184363700224, 4194303);
+f(35184372088832, 4194304);
+f(35184380477440, 4194305);
+f(70368735789056, 8388607);
+f(70368744177664, 8388608);
+x = 8388609;
+f(0, 0);
+f(8388609, 1);
+f(16777218, 2);
+f(25165827, 3);
+f(33554436, 4);
+f(41943045, 5);
+f(58720263, 7);
+f(67108872, 8);
+f(75497481, 9);
+f(125829135, 15);
+f(134217744, 16);
+f(142606353, 17);
+f(260046879, 31);
+f(268435488, 32);
+f(276824097, 33);
+f(528482367, 63);
+f(536870976, 64);
+f(545259585, 65);
+f(1065353343, 127);
+f(1073741952, 128);
+f(1082130561, 129);
+f(2139095295, 255);
+f(2147483904, 256);
+f(2155872513, 257);
+f(4286579199, 511);
+f(4294967808, 512);
+f(4303356417, 513);
+f(8581547007, 1023);
+f(8589935616, 1024);
+f(8598324225, 1025);
+f(17171482623, 2047);
+f(17179871232, 2048);
+f(17188259841, 2049);
+f(34351353855, 4095);
+f(34359742464, 4096);
+f(34368131073, 4097);
+f(68711096319, 8191);
+f(68719484928, 8192);
+f(68727873537, 8193);
+f(137430581247, 16383);
+f(137438969856, 16384);
+f(137447358465, 16385);
+f(274869551103, 32767);
+f(274877939712, 32768);
+f(274886328321, 32769);
+f(549747490815, 65535);
+f(549755879424, 65536);
+f(549764268033, 65537);
+f(1099503370239, 131071);
+f(1099511758848, 131072);
+f(1099520147457, 131073);
+f(2199015129087, 262143);
+f(2199023517696, 262144);
+f(2199031906305, 262145);
+f(4398038646783, 524287);
+f(4398047035392, 524288);
+f(4398055424001, 524289);
+f(8796085682175, 1048575);
+f(8796094070784, 1048576);
+f(8796102459393, 1048577);
+f(17592179752959, 2097151);
+f(17592188141568, 2097152);
+f(17592196530177, 2097153);
+f(35184367894527, 4194303);
+f(35184376283136, 4194304);
+f(35184384671745, 4194305);
+f(70368744177663, 8388607);
+f(70368752566272, 8388608);
+f(70368760954881, 8388609);
+x = 16777215;
+f(0, 0);
+f(16777215, 1);
+f(33554430, 2);
+f(50331645, 3);
+f(67108860, 4);
+f(83886075, 5);
+f(117440505, 7);
+f(134217720, 8);
+f(150994935, 9);
+f(251658225, 15);
+f(268435440, 16);
+f(285212655, 17);
+f(520093665, 31);
+f(536870880, 32);
+f(553648095, 33);
+f(1056964545, 63);
+f(1073741760, 64);
+f(1090518975, 65);
+f(2130706305, 127);
+f(2147483520, 128);
+f(2164260735, 129);
+f(4278189825, 255);
+f(4294967040, 256);
+f(4311744255, 257);
+f(8573156865, 511);
+f(8589934080, 512);
+f(8606711295, 513);
+f(17163090945, 1023);
+f(17179868160, 1024);
+f(17196645375, 1025);
+f(34342959105, 2047);
+f(34359736320, 2048);
+f(34376513535, 2049);
+f(68702695425, 4095);
+f(68719472640, 4096);
+f(68736249855, 4097);
+f(137422168065, 8191);
+f(137438945280, 8192);
+f(137455722495, 8193);
+f(274861113345, 16383);
+f(274877890560, 16384);
+f(274894667775, 16385);
+f(549739003905, 32767);
+f(549755781120, 32768);
+f(549772558335, 32769);
+f(1099494785025, 65535);
+f(1099511562240, 65536);
+f(1099528339455, 65537);
+f(2199006347265, 131071);
+f(2199023124480, 131072);
+f(2199039901695, 131073);
+f(4398029471745, 262143);
+f(4398046248960, 262144);
+f(4398063026175, 262145);
+f(8796075720705, 524287);
+f(8796092497920, 524288);
+f(8796109275135, 524289);
+f(17592168218625, 1048575);
+f(17592184995840, 1048576);
+f(17592201773055, 1048577);
+f(35184353214465, 2097151);
+f(35184369991680, 2097152);
+f(35184386768895, 2097153);
+f(70368723206145, 4194303);
+f(70368739983360, 4194304);
+f(70368756760575, 4194305);
+f(140737463189505, 8388607);
+f(140737479966720, 8388608);
+f(140737496743935, 8388609);
+f(281474943156225, 16777215);
+x = 16777216;
+f(0, 0);
+f(16777216, 1);
+f(33554432, 2);
+f(50331648, 3);
+f(67108864, 4);
+f(83886080, 5);
+f(117440512, 7);
+f(134217728, 8);
+f(150994944, 9);
+f(251658240, 15);
+f(268435456, 16);
+f(285212672, 17);
+f(520093696, 31);
+f(536870912, 32);
+f(553648128, 33);
+f(1056964608, 63);
+f(1073741824, 64);
+f(1090519040, 65);
+f(2130706432, 127);
+f(2147483648, 128);
+f(2164260864, 129);
+f(4278190080, 255);
+f(4294967296, 256);
+f(4311744512, 257);
+f(8573157376, 511);
+f(8589934592, 512);
+f(8606711808, 513);
+f(17163091968, 1023);
+f(17179869184, 1024);
+f(17196646400, 1025);
+f(34342961152, 2047);
+f(34359738368, 2048);
+f(34376515584, 2049);
+f(68702699520, 4095);
+f(68719476736, 4096);
+f(68736253952, 4097);
+f(137422176256, 8191);
+f(137438953472, 8192);
+f(137455730688, 8193);
+f(274861129728, 16383);
+f(274877906944, 16384);
+f(274894684160, 16385);
+f(549739036672, 32767);
+f(549755813888, 32768);
+f(549772591104, 32769);
+f(1099494850560, 65535);
+f(1099511627776, 65536);
+f(1099528404992, 65537);
+f(2199006478336, 131071);
+f(2199023255552, 131072);
+f(2199040032768, 131073);
+f(4398029733888, 262143);
+f(4398046511104, 262144);
+f(4398063288320, 262145);
+f(8796076244992, 524287);
+f(8796093022208, 524288);
+f(8796109799424, 524289);
+f(17592169267200, 1048575);
+f(17592186044416, 1048576);
+f(17592202821632, 1048577);
+f(35184355311616, 2097151);
+f(35184372088832, 2097152);
+f(35184388866048, 2097153);
+f(70368727400448, 4194303);
+f(70368744177664, 4194304);
+f(70368760954880, 4194305);
+f(140737471578112, 8388607);
+f(140737488355328, 8388608);
+f(140737505132544, 8388609);
+f(281474959933440, 16777215);
+f(281474976710656, 16777216);
+x = 16777217;
+f(0, 0);
+f(16777217, 1);
+f(33554434, 2);
+f(50331651, 3);
+f(67108868, 4);
+f(83886085, 5);
+f(117440519, 7);
+f(134217736, 8);
+f(150994953, 9);
+f(251658255, 15);
+f(268435472, 16);
+f(285212689, 17);
+f(520093727, 31);
+f(536870944, 32);
+f(553648161, 33);
+f(1056964671, 63);
+f(1073741888, 64);
+f(1090519105, 65);
+f(2130706559, 127);
+f(2147483776, 128);
+f(2164260993, 129);
+f(4278190335, 255);
+f(4294967552, 256);
+f(4311744769, 257);
+f(8573157887, 511);
+f(8589935104, 512);
+f(8606712321, 513);
+f(17163092991, 1023);
+f(17179870208, 1024);
+f(17196647425, 1025);
+f(34342963199, 2047);
+f(34359740416, 2048);
+f(34376517633, 2049);
+f(68702703615, 4095);
+f(68719480832, 4096);
+f(68736258049, 4097);
+f(137422184447, 8191);
+f(137438961664, 8192);
+f(137455738881, 8193);
+f(274861146111, 16383);
+f(274877923328, 16384);
+f(274894700545, 16385);
+f(549739069439, 32767);
+f(549755846656, 32768);
+f(549772623873, 32769);
+f(1099494916095, 65535);
+f(1099511693312, 65536);
+f(1099528470529, 65537);
+f(2199006609407, 131071);
+f(2199023386624, 131072);
+f(2199040163841, 131073);
+f(4398029996031, 262143);
+f(4398046773248, 262144);
+f(4398063550465, 262145);
+f(8796076769279, 524287);
+f(8796093546496, 524288);
+f(8796110323713, 524289);
+f(17592170315775, 1048575);
+f(17592187092992, 1048576);
+f(17592203870209, 1048577);
+f(35184357408767, 2097151);
+f(35184374185984, 2097152);
+f(35184390963201, 2097153);
+f(70368731594751, 4194303);
+f(70368748371968, 4194304);
+f(70368765149185, 4194305);
+f(140737479966719, 8388607);
+f(140737496743936, 8388608);
+f(140737513521153, 8388609);
+f(281474976710655, 16777215);
+f(281474993487872, 16777216);
+f(281475010265089, 16777217);
+x = 33554431;
+f(0, 0);
+f(33554431, 1);
+f(67108862, 2);
+f(100663293, 3);
+f(134217724, 4);
+f(167772155, 5);
+f(234881017, 7);
+f(268435448, 8);
+f(301989879, 9);
+f(503316465, 15);
+f(536870896, 16);
+f(570425327, 17);
+f(1040187361, 31);
+f(1073741792, 32);
+f(1107296223, 33);
+f(2113929153, 63);
+f(2147483584, 64);
+f(2181038015, 65);
+f(4261412737, 127);
+f(4294967168, 128);
+f(4328521599, 129);
+f(8556379905, 255);
+f(8589934336, 256);
+f(8623488767, 257);
+f(17146314241, 511);
+f(17179868672, 512);
+f(17213423103, 513);
+f(34326182913, 1023);
+f(34359737344, 1024);
+f(34393291775, 1025);
+f(68685920257, 2047);
+f(68719474688, 2048);
+f(68753029119, 2049);
+f(137405394945, 4095);
+f(137438949376, 4096);
+f(137472503807, 4097);
+f(274844344321, 8191);
+f(274877898752, 8192);
+f(274911453183, 8193);
+f(549722243073, 16383);
+f(549755797504, 16384);
+f(549789351935, 16385);
+f(1099478040577, 32767);
+f(1099511595008, 32768);
+f(1099545149439, 32769);
+f(2198989635585, 65535);
+f(2199023190016, 65536);
+f(2199056744447, 65537);
+f(4398012825601, 131071);
+f(4398046380032, 131072);
+f(4398079934463, 131073);
+f(8796059205633, 262143);
+f(8796092760064, 262144);
+f(8796126314495, 262145);
+f(17592151965697, 524287);
+f(17592185520128, 524288);
+f(17592219074559, 524289);
+f(35184337485825, 1048575);
+f(35184371040256, 1048576);
+f(35184404594687, 1048577);
+f(70368708526081, 2097151);
+f(70368742080512, 2097152);
+f(70368775634943, 2097153);
+f(140737450606593, 4194303);
+f(140737484161024, 4194304);
+f(140737517715455, 4194305);
+f(281474934767617, 8388607);
+f(281474968322048, 8388608);
+f(281475001876479, 8388609);
+f(562949903089665, 16777215);
+f(562949936644096, 16777216);
+f(562949970198527, 16777217);
+f(1125899839733761, 33554431);
\ No newline at end of file
diff --git a/deps/v8/test/mjsunit/mul-exhaustive-part7.js b/deps/v8/test/mjsunit/mul-exhaustive-part7.js
new file mode 100644
index 0000000000..d517225e7c
--- /dev/null
+++ b/deps/v8/test/mjsunit/mul-exhaustive-part7.js
@@ -0,0 +1,497 @@
+// Copyright 2008 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+var x;
+
+// Converts a number to string respecting -0.
+function stringify(n) {
+  if ((1 / n) === -Infinity) return "-0";
+  return String(n);
+}
+
+function f(expected, y) {
+  function testEval(string, x, y) {
+    var mulFunction = Function("x, y", "return " + string);
+    return mulFunction(x, y);
+  }
+  function mulTest(expected, x, y) {
+    assertEquals(expected, x * y);
+    assertEquals(expected, testEval(stringify(x) + " * y", x, y));
+    assertEquals(expected, testEval("x * " + stringify(y), x, y));
+    assertEquals(expected, testEval(stringify(x) + " * " + stringify(y), x, y));
+  }
+  mulTest(expected, x, y);
+  mulTest(-expected, -x, y);
+  mulTest(-expected, x, -y);
+  mulTest(expected, -x, -y);
+  if (x === y) return;  // Symmetric cases not necessary.
+  mulTest(expected, y, x);
+  mulTest(-expected, -y, x);
+  mulTest(-expected, y, -x);
+  mulTest(expected, -y, -x);
+}
+
+x = 33554432;
+f(0, 0);
+f(33554432, 1);
+f(67108864, 2);
+f(100663296, 3);
+f(134217728, 4);
+f(167772160, 5);
+f(234881024, 7);
+f(268435456, 8);
+f(301989888, 9);
+f(503316480, 15);
+f(536870912, 16);
+f(570425344, 17);
+f(1040187392, 31);
+f(1073741824, 32);
+f(1107296256, 33);
+f(2113929216, 63);
+f(2147483648, 64);
+f(2181038080, 65);
+f(4261412864, 127);
+f(4294967296, 128);
+f(4328521728, 129);
+f(8556380160, 255);
+f(8589934592, 256);
+f(8623489024, 257);
+f(17146314752, 511);
+f(17179869184, 512);
+f(17213423616, 513);
+f(34326183936, 1023);
+f(34359738368, 1024);
+f(34393292800, 1025);
+f(68685922304, 2047);
+f(68719476736, 2048);
+f(68753031168, 2049);
+f(137405399040, 4095);
+f(137438953472, 4096);
+f(137472507904, 4097);
+f(274844352512, 8191);
+f(274877906944, 8192);
+f(274911461376, 8193);
+f(549722259456, 16383);
+f(549755813888, 16384);
+f(549789368320, 16385);
+f(1099478073344, 32767);
+f(1099511627776, 32768);
+f(1099545182208, 32769);
+f(2198989701120, 65535);
+f(2199023255552, 65536);
+f(2199056809984, 65537);
+f(4398012956672, 131071);
+f(4398046511104, 131072);
+f(4398080065536, 131073);
+f(8796059467776, 262143);
+f(8796093022208, 262144);
+f(8796126576640, 262145);
+f(17592152489984, 524287);
+f(17592186044416, 524288);
+f(17592219598848, 524289);
+f(35184338534400, 1048575);
+f(35184372088832, 1048576);
+f(35184405643264, 1048577);
+f(70368710623232, 2097151);
+f(70368744177664, 2097152);
+f(70368777732096, 2097153);
+f(140737454800896, 4194303);
+f(140737488355328, 4194304);
+f(140737521909760, 4194305);
+f(281474943156224, 8388607);
+f(281474976710656, 8388608);
+f(281475010265088, 8388609);
+f(562949919866880, 16777215);
+f(562949953421312, 16777216);
+f(562949986975744, 16777217);
+f(1125899873288192, 33554431);
+f(1125899906842624, 33554432);
+x = 33554433;
+f(0, 0);
+f(33554433, 1);
+f(67108866, 2);
+f(100663299, 3);
+f(134217732, 4);
+f(167772165, 5);
+f(234881031, 7);
+f(268435464, 8);
+f(301989897, 9);
+f(503316495, 15);
+f(536870928, 16);
+f(570425361, 17);
+f(1040187423, 31);
+f(1073741856, 32);
+f(1107296289, 33);
+f(2113929279, 63);
+f(2147483712, 64);
+f(2181038145, 65);
+f(4261412991, 127);
+f(4294967424, 128);
+f(4328521857, 129);
+f(8556380415, 255);
+f(8589934848, 256);
+f(8623489281, 257);
+f(17146315263, 511);
+f(17179869696, 512);
+f(17213424129, 513);
+f(34326184959, 1023);
+f(34359739392, 1024);
+f(34393293825, 1025);
+f(68685924351, 2047);
+f(68719478784, 2048);
+f(68753033217, 2049);
+f(137405403135, 4095);
+f(137438957568, 4096);
+f(137472512001, 4097);
+f(274844360703, 8191);
+f(274877915136, 8192);
+f(274911469569, 8193);
+f(549722275839, 16383);
+f(549755830272, 16384);
+f(549789384705, 16385);
+f(1099478106111, 32767);
+f(1099511660544, 32768);
+f(1099545214977, 32769);
+f(2198989766655, 65535);
+f(2199023321088, 65536);
+f(2199056875521, 65537);
+f(4398013087743, 131071);
+f(4398046642176, 131072);
+f(4398080196609, 131073);
+f(8796059729919, 262143);
+f(8796093284352, 262144);
+f(8796126838785, 262145);
+f(17592153014271, 524287);
+f(17592186568704, 524288);
+f(17592220123137, 524289);
+f(35184339582975, 1048575);
+f(35184373137408, 1048576);
+f(35184406691841, 1048577);
+f(70368712720383, 2097151);
+f(70368746274816, 2097152);
+f(70368779829249, 2097153);
+f(140737458995199, 4194303);
+f(140737492549632, 4194304);
+f(140737526104065, 4194305);
+f(281474951544831, 8388607);
+f(281474985099264, 8388608);
+f(281475018653697, 8388609);
+f(562949936644095, 16777215);
+f(562949970198528, 16777216);
+f(562950003752961, 16777217);
+f(1125899906842623, 33554431);
+f(1125899940397056, 33554432);
+f(1125899973951489, 33554433);
+x = 67108863;
+f(0, 0);
+f(67108863, 1);
+f(134217726, 2);
+f(201326589, 3);
+f(268435452, 4);
+f(335544315, 5);
+f(469762041, 7);
+f(536870904, 8);
+f(603979767, 9);
+f(1006632945, 15);
+f(1073741808, 16);
+f(1140850671, 17);
+f(2080374753, 31);
+f(2147483616, 32);
+f(2214592479, 33);
+f(4227858369, 63);
+f(4294967232, 64);
+f(4362076095, 65);
+f(8522825601, 127);
+f(8589934464, 128);
+f(8657043327, 129);
+f(17112760065, 255);
+f(17179868928, 256);
+f(17246977791, 257);
+f(34292628993, 511);
+f(34359737856, 512);
+f(34426846719, 513);
+f(68652366849, 1023);
+f(68719475712, 1024);
+f(68786584575, 1025);
+f(137371842561, 2047);
+f(137438951424, 2048);
+f(137506060287, 2049);
+f(274810793985, 4095);
+f(274877902848, 4096);
+f(274945011711, 4097);
+f(549688696833, 8191);
+f(549755805696, 8192);
+f(549822914559, 8193);
+f(1099444502529, 16383);
+f(1099511611392, 16384);
+f(1099578720255, 16385);
+f(2198956113921, 32767);
+f(2199023222784, 32768);
+f(2199090331647, 32769);
+f(4397979336705, 65535);
+f(4398046445568, 65536);
+f(4398113554431, 65537);
+f(8796025782273, 131071);
+f(8796092891136, 131072);
+f(8796159999999, 131073);
+f(17592118673409, 262143);
+f(17592185782272, 262144);
+f(17592252891135, 262145);
+f(35184304455681, 524287);
+f(35184371564544, 524288);
+f(35184438673407, 524289);
+f(70368676020225, 1048575);
+f(70368743129088, 1048576);
+f(70368810237951, 1048577);
+f(140737419149313, 2097151);
+f(140737486258176, 2097152);
+f(140737553367039, 2097153);
+f(281474905407489, 4194303);
+f(281474972516352, 4194304);
+f(281475039625215, 4194305);
+f(562949877923841, 8388607);
+f(562949945032704, 8388608);
+f(562950012141567, 8388609);
+f(1125899822956545, 16777215);
+f(1125899890065408, 16777216);
+f(1125899957174271, 16777217);
+x = 67108864;
+f(0, 0);
+f(67108864, 1);
+f(134217728, 2);
+f(201326592, 3);
+f(268435456, 4);
+f(335544320, 5);
+f(469762048, 7);
+f(536870912, 8);
+f(603979776, 9);
+f(1006632960, 15);
+f(1073741824, 16);
+f(1140850688, 17);
+f(2080374784, 31);
+f(2147483648, 32);
+f(2214592512, 33);
+f(4227858432, 63);
+f(4294967296, 64);
+f(4362076160, 65);
+f(8522825728, 127);
+f(8589934592, 128);
+f(8657043456, 129);
+f(17112760320, 255);
+f(17179869184, 256);
+f(17246978048, 257);
+f(34292629504, 511);
+f(34359738368, 512);
+f(34426847232, 513);
+f(68652367872, 1023);
+f(68719476736, 1024);
+f(68786585600, 1025);
+f(137371844608, 2047);
+f(137438953472, 2048);
+f(137506062336, 2049);
+f(274810798080, 4095);
+f(274877906944, 4096);
+f(274945015808, 4097);
+f(549688705024, 8191);
+f(549755813888, 8192);
+f(549822922752, 8193);
+f(1099444518912, 16383);
+f(1099511627776, 16384);
+f(1099578736640, 16385);
+f(2198956146688, 32767);
+f(2199023255552, 32768);
+f(2199090364416, 32769);
+f(4397979402240, 65535);
+f(4398046511104, 65536);
+f(4398113619968, 65537);
+f(8796025913344, 131071);
+f(8796093022208, 131072);
+f(8796160131072, 131073);
+f(17592118935552, 262143);
+f(17592186044416, 262144);
+f(17592253153280, 262145);
+f(35184304979968, 524287);
+f(35184372088832, 524288);
+f(35184439197696, 524289);
+f(70368677068800, 1048575);
+f(70368744177664, 1048576);
+f(70368811286528, 1048577);
+f(140737421246464, 2097151);
+f(140737488355328, 2097152);
+f(140737555464192, 2097153);
+f(281474909601792, 4194303);
+f(281474976710656, 4194304);
+f(281475043819520, 4194305);
+f(562949886312448, 8388607);
+f(562949953421312, 8388608);
+f(562950020530176, 8388609);
+f(1125899839733760, 16777215);
+f(1125899906842624, 16777216);
+f(1125899973951488, 16777217);
+x = 67108865;
+f(0, 0);
+f(67108865, 1);
+f(134217730, 2);
+f(201326595, 3);
+f(268435460, 4);
+f(335544325, 5);
+f(469762055, 7);
+f(536870920, 8);
+f(603979785, 9);
+f(1006632975, 15);
+f(1073741840, 16);
+f(1140850705, 17);
+f(2080374815, 31);
+f(2147483680, 32);
+f(2214592545, 33);
+f(4227858495, 63);
+f(4294967360, 64);
+f(4362076225, 65);
+f(8522825855, 127);
+f(8589934720, 128);
+f(8657043585, 129);
+f(17112760575, 255);
+f(17179869440, 256);
+f(17246978305, 257);
+f(34292630015, 511);
+f(34359738880, 512);
+f(34426847745, 513);
+f(68652368895, 1023);
+f(68719477760, 1024);
+f(68786586625, 1025);
+f(137371846655, 2047);
+f(137438955520, 2048);
+f(137506064385, 2049);
+f(274810802175, 4095);
+f(274877911040, 4096);
+f(274945019905, 4097);
+f(549688713215, 8191);
+f(549755822080, 8192);
+f(549822930945, 8193);
+f(1099444535295, 16383);
+f(1099511644160, 16384);
+f(1099578753025, 16385);
+f(2198956179455, 32767);
+f(2199023288320, 32768);
+f(2199090397185, 32769);
+f(4397979467775, 65535);
+f(4398046576640, 65536);
+f(4398113685505, 65537);
+f(8796026044415, 131071);
+f(8796093153280, 131072);
+f(8796160262145, 131073);
+f(17592119197695, 262143);
+f(17592186306560, 262144);
+f(17592253415425, 262145);
+f(35184305504255, 524287);
+f(35184372613120, 524288);
+f(35184439721985, 524289);
+f(70368678117375, 1048575);
+f(70368745226240, 1048576);
+f(70368812335105, 1048577);
+f(140737423343615, 2097151);
+f(140737490452480, 2097152);
+f(140737557561345, 2097153);
+f(281474913796095, 4194303);
+f(281474980904960, 4194304);
+f(281475048013825, 4194305);
+f(562949894701055, 8388607);
+f(562949961809920, 8388608);
+f(562950028918785, 8388609);
+f(1125899856510975, 16777215);
+f(1125899923619840, 16777216);
+f(1125899990728705, 16777217);
+x = 134217727;
+f(0, 0);
+f(134217727, 1);
+f(268435454, 2);
+f(402653181, 3);
+f(536870908, 4);
+f(671088635, 5);
+f(939524089, 7);
+f(1073741816, 8);
+f(1207959543, 9);
+f(2013265905, 15);
+f(2147483632, 16);
+f(2281701359, 17);
+f(4160749537, 31);
+f(4294967264, 32);
+f(4429184991, 33);
+f(8455716801, 63);
+f(8589934528, 64);
+f(8724152255, 65);
+f(17045651329, 127);
+f(17179869056, 128);
+f(17314086783, 129);
+f(34225520385, 255);
+f(34359738112, 256);
+f(34493955839, 257);
+f(68585258497, 511);
+f(68719476224, 512);
+f(68853693951, 513);
+f(137304734721, 1023);
+f(137438952448, 1024);
+f(137573170175, 1025);
+f(274743687169, 2047);
+f(274877904896, 2048);
+f(275012122623, 2049);
+f(549621592065, 4095);
+f(549755809792, 4096);
+f(549890027519, 4097);
+f(1099377401857, 8191);
+f(1099511619584, 8192);
+f(1099645837311, 8193);
+f(2198889021441, 16383);
+f(2199023239168, 16384);
+f(2199157456895, 16385);
+f(4397912260609, 32767);
+f(4398046478336, 32768);
+f(4398180696063, 32769);
+f(8795958738945, 65535);
+f(8796092956672, 65536);
+f(8796227174399, 65537);
+f(17592051695617, 131071);
+f(17592185913344, 131072);
+f(17592320131071, 131073);
+f(35184237608961, 262143);
+f(35184371826688, 262144);
+f(35184506044415, 262145);
+f(70368609435649, 524287);
+f(70368743653376, 524288);
+f(70368877871103, 524289);
+f(140737353089025, 1048575);
+f(140737487306752, 1048576);
+f(140737621524479, 1048577);
+f(281474840395777, 2097151);
+f(281474974613504, 2097152);
+f(281475108831231, 2097153);
+f(562949815009281, 4194303);
+f(562949949227008, 4194304);
+f(562950083444735, 4194305);
+f(1125899764236289, 8388607);
+f(1125899898454016, 8388608);
+f(1125900032671743, 8388609);
diff --git a/deps/v8/test/mjsunit/mul-exhaustive-part8.js b/deps/v8/test/mjsunit/mul-exhaustive-part8.js
new file mode 100644
index 0000000000..7e5f2851c9
--- /dev/null
+++ b/deps/v8/test/mjsunit/mul-exhaustive-part8.js
@@ -0,0 +1,526 @@
+// Copyright 2008 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+var x;
+
+// Converts a number to string respecting -0.
+function stringify(n) {
+  if ((1 / n) === -Infinity) return "-0";
+  return String(n);
+}
+
+function f(expected, y) {
+  function testEval(string, x, y) {
+    var mulFunction = Function("x, y", "return " + string);
+    return mulFunction(x, y);
+  }
+  function mulTest(expected, x, y) {
+    assertEquals(expected, x * y);
+    assertEquals(expected, testEval(stringify(x) + " * y", x, y));
+    assertEquals(expected, testEval("x * " + stringify(y), x, y));
+    assertEquals(expected, testEval(stringify(x) + " * " + stringify(y), x, y));
+  }
+  mulTest(expected, x, y);
+  mulTest(-expected, -x, y);
+  mulTest(-expected, x, -y);
+  mulTest(expected, -x, -y);
+  if (x === y) return;  // Symmetric cases not necessary.
+  mulTest(expected, y, x);
+  mulTest(-expected, -y, x);
+  mulTest(-expected, y, -x);
+  mulTest(expected, -y, -x);
+}
+
+x = 134217728;
+f(0, 0);
+f(134217728, 1);
+f(268435456, 2);
+f(402653184, 3);
+f(536870912, 4);
+f(671088640, 5);
+f(939524096, 7);
+f(1073741824, 8);
+f(1207959552, 9);
+f(2013265920, 15);
+f(2147483648, 16);
+f(2281701376, 17);
+f(4160749568, 31);
+f(4294967296, 32);
+f(4429185024, 33);
+f(8455716864, 63);
+f(8589934592, 64);
+f(8724152320, 65);
+f(17045651456, 127);
+f(17179869184, 128);
+f(17314086912, 129);
+f(34225520640, 255);
+f(34359738368, 256);
+f(34493956096, 257);
+f(68585259008, 511);
+f(68719476736, 512);
+f(68853694464, 513);
+f(137304735744, 1023);
+f(137438953472, 1024);
+f(137573171200, 1025);
+f(274743689216, 2047);
+f(274877906944, 2048);
+f(275012124672, 2049);
+f(549621596160, 4095);
+f(549755813888, 4096);
+f(549890031616, 4097);
+f(1099377410048, 8191);
+f(1099511627776, 8192);
+f(1099645845504, 8193);
+f(2198889037824, 16383);
+f(2199023255552, 16384);
+f(2199157473280, 16385);
+f(4397912293376, 32767);
+f(4398046511104, 32768);
+f(4398180728832, 32769);
+f(8795958804480, 65535);
+f(8796093022208, 65536);
+f(8796227239936, 65537);
+f(17592051826688, 131071);
+f(17592186044416, 131072);
+f(17592320262144, 131073);
+f(35184237871104, 262143);
+f(35184372088832, 262144);
+f(35184506306560, 262145);
+f(70368609959936, 524287);
+f(70368744177664, 524288);
+f(70368878395392, 524289);
+f(140737354137600, 1048575);
+f(140737488355328, 1048576);
+f(140737622573056, 1048577);
+f(281474842492928, 2097151);
+f(281474976710656, 2097152);
+f(281475110928384, 2097153);
+f(562949819203584, 4194303);
+f(562949953421312, 4194304);
+f(562950087639040, 4194305);
+f(1125899772624896, 8388607);
+f(1125899906842624, 8388608);
+f(1125900041060352, 8388609);
+x = 134217729;
+f(0, 0);
+f(134217729, 1);
+f(268435458, 2);
+f(402653187, 3);
+f(536870916, 4);
+f(671088645, 5);
+f(939524103, 7);
+f(1073741832, 8);
+f(1207959561, 9);
+f(2013265935, 15);
+f(2147483664, 16);
+f(2281701393, 17);
+f(4160749599, 31);
+f(4294967328, 32);
+f(4429185057, 33);
+f(8455716927, 63);
+f(8589934656, 64);
+f(8724152385, 65);
+f(17045651583, 127);
+f(17179869312, 128);
+f(17314087041, 129);
+f(34225520895, 255);
+f(34359738624, 256);
+f(34493956353, 257);
+f(68585259519, 511);
+f(68719477248, 512);
+f(68853694977, 513);
+f(137304736767, 1023);
+f(137438954496, 1024);
+f(137573172225, 1025);
+f(274743691263, 2047);
+f(274877908992, 2048);
+f(275012126721, 2049);
+f(549621600255, 4095);
+f(549755817984, 4096);
+f(549890035713, 4097);
+f(1099377418239, 8191);
+f(1099511635968, 8192);
+f(1099645853697, 8193);
+f(2198889054207, 16383);
+f(2199023271936, 16384);
+f(2199157489665, 16385);
+f(4397912326143, 32767);
+f(4398046543872, 32768);
+f(4398180761601, 32769);
+f(8795958870015, 65535);
+f(8796093087744, 65536);
+f(8796227305473, 65537);
+f(17592051957759, 131071);
+f(17592186175488, 131072);
+f(17592320393217, 131073);
+f(35184238133247, 262143);
+f(35184372350976, 262144);
+f(35184506568705, 262145);
+f(70368610484223, 524287);
+f(70368744701952, 524288);
+f(70368878919681, 524289);
+f(140737355186175, 1048575);
+f(140737489403904, 1048576);
+f(140737623621633, 1048577);
+f(281474844590079, 2097151);
+f(281474978807808, 2097152);
+f(281475113025537, 2097153);
+f(562949823397887, 4194303);
+f(562949957615616, 4194304);
+f(562950091833345, 4194305);
+f(1125899781013503, 8388607);
+f(1125899915231232, 8388608);
+f(1125900049448961, 8388609);
+x = 268435455;
+f(0, 0);
+f(268435455, 1);
+f(536870910, 2);
+f(805306365, 3);
+f(1073741820, 4);
+f(1342177275, 5);
+f(1879048185, 7);
+f(2147483640, 8);
+f(2415919095, 9);
+f(4026531825, 15);
+f(4294967280, 16);
+f(4563402735, 17);
+f(8321499105, 31);
+f(8589934560, 32);
+f(8858370015, 33);
+f(16911433665, 63);
+f(17179869120, 64);
+f(17448304575, 65);
+f(34091302785, 127);
+f(34359738240, 128);
+f(34628173695, 129);
+f(68451041025, 255);
+f(68719476480, 256);
+f(68987911935, 257);
+f(137170517505, 511);
+f(137438952960, 512);
+f(137707388415, 513);
+f(274609470465, 1023);
+f(274877905920, 1024);
+f(275146341375, 1025);
+f(549487376385, 2047);
+f(549755811840, 2048);
+f(550024247295, 2049);
+f(1099243188225, 4095);
+f(1099511623680, 4096);
+f(1099780059135, 4097);
+f(2198754811905, 8191);
+f(2199023247360, 8192);
+f(2199291682815, 8193);
+f(4397778059265, 16383);
+f(4398046494720, 16384);
+f(4398314930175, 16385);
+f(8795824553985, 32767);
+f(8796092989440, 32768);
+f(8796361424895, 32769);
+f(17591917543425, 65535);
+f(17592185978880, 65536);
+f(17592454414335, 65537);
+f(35184103522305, 131071);
+f(35184371957760, 131072);
+f(35184640393215, 131073);
+f(70368475480065, 262143);
+f(70368743915520, 262144);
+f(70369012350975, 262145);
+f(140737219395585, 524287);
+f(140737487831040, 524288);
+f(140737756266495, 524289);
+f(281474707226625, 1048575);
+f(281474975662080, 1048576);
+f(281475244097535, 1048577);
+f(562949682888705, 2097151);
+f(562949951324160, 2097152);
+f(562950219759615, 2097153);
+f(1125899634212865, 4194303);
+f(1125899902648320, 4194304);
+f(1125900171083775, 4194305);
+x = 268435456;
+f(0, 0);
+f(268435456, 1);
+f(536870912, 2);
+f(805306368, 3);
+f(1073741824, 4);
+f(1342177280, 5);
+f(1879048192, 7);
+f(2147483648, 8);
+f(2415919104, 9);
+f(4026531840, 15);
+f(4294967296, 16);
+f(4563402752, 17);
+f(8321499136, 31);
+f(8589934592, 32);
+f(8858370048, 33);
+f(16911433728, 63);
+f(17179869184, 64);
+f(17448304640, 65);
+f(34091302912, 127);
+f(34359738368, 128);
+f(34628173824, 129);
+f(68451041280, 255);
+f(68719476736, 256);
+f(68987912192, 257);
+f(137170518016, 511);
+f(137438953472, 512);
+f(137707388928, 513);
+f(274609471488, 1023);
+f(274877906944, 1024);
+f(275146342400, 1025);
+f(549487378432, 2047);
+f(549755813888, 2048);
+f(550024249344, 2049);
+f(1099243192320, 4095);
+f(1099511627776, 4096);
+f(1099780063232, 4097);
+f(2198754820096, 8191);
+f(2199023255552, 8192);
+f(2199291691008, 8193);
+f(4397778075648, 16383);
+f(4398046511104, 16384);
+f(4398314946560, 16385);
+f(8795824586752, 32767);
+f(8796093022208, 32768);
+f(8796361457664, 32769);
+f(17591917608960, 65535);
+f(17592186044416, 65536);
+f(17592454479872, 65537);
+f(35184103653376, 131071);
+f(35184372088832, 131072);
+f(35184640524288, 131073);
+f(70368475742208, 262143);
+f(70368744177664, 262144);
+f(70369012613120, 262145);
+f(140737219919872, 524287);
+f(140737488355328, 524288);
+f(140737756790784, 524289);
+f(281474708275200, 1048575);
+f(281474976710656, 1048576);
+f(281475245146112, 1048577);
+f(562949684985856, 2097151);
+f(562949953421312, 2097152);
+f(562950221856768, 2097153);
+f(1125899638407168, 4194303);
+f(1125899906842624, 4194304);
+f(1125900175278080, 4194305);
+x = 268435457;
+f(0, 0);
+f(268435457, 1);
+f(536870914, 2);
+f(805306371, 3);
+f(1073741828, 4);
+f(1342177285, 5);
+f(1879048199, 7);
+f(2147483656, 8);
+f(2415919113, 9);
+f(4026531855, 15);
+f(4294967312, 16);
+f(4563402769, 17);
+f(8321499167, 31);
+f(8589934624, 32);
+f(8858370081, 33);
+f(16911433791, 63);
+f(17179869248, 64);
+f(17448304705, 65);
+f(34091303039, 127);
+f(34359738496, 128);
+f(34628173953, 129);
+f(68451041535, 255);
+f(68719476992, 256);
+f(68987912449, 257);
+f(137170518527, 511);
+f(137438953984, 512);
+f(137707389441, 513);
+f(274609472511, 1023);
+f(274877907968, 1024);
+f(275146343425, 1025);
+f(549487380479, 2047);
+f(549755815936, 2048);
+f(550024251393, 2049);
+f(1099243196415, 4095);
+f(1099511631872, 4096);
+f(1099780067329, 4097);
+f(2198754828287, 8191);
+f(2199023263744, 8192);
+f(2199291699201, 8193);
+f(4397778092031, 16383);
+f(4398046527488, 16384);
+f(4398314962945, 16385);
+f(8795824619519, 32767);
+f(8796093054976, 32768);
+f(8796361490433, 32769);
+f(17591917674495, 65535);
+f(17592186109952, 65536);
+f(17592454545409, 65537);
+f(35184103784447, 131071);
+f(35184372219904, 131072);
+f(35184640655361, 131073);
+f(70368476004351, 262143);
+f(70368744439808, 262144);
+f(70369012875265, 262145);
+f(140737220444159, 524287);
+f(140737488879616, 524288);
+f(140737757315073, 524289);
+f(281474709323775, 1048575);
+f(281474977759232, 1048576);
+f(281475246194689, 1048577);
+f(562949687083007, 2097151);
+f(562949955518464, 2097152);
+f(562950223953921, 2097153);
+f(1125899642601471, 4194303);
+f(1125899911036928, 4194304);
+f(1125900179472385, 4194305);
+x = 536870911;
+f(0, 0);
+f(536870911, 1);
+f(1073741822, 2);
+f(1610612733, 3);
+f(2147483644, 4);
+f(2684354555, 5);
+f(3758096377, 7);
+f(4294967288, 8);
+f(4831838199, 9);
+f(8053063665, 15);
+f(8589934576, 16);
+f(9126805487, 17);
+f(16642998241, 31);
+f(17179869152, 32);
+f(17716740063, 33);
+f(33822867393, 63);
+f(34359738304, 64);
+f(34896609215, 65);
+f(68182605697, 127);
+f(68719476608, 128);
+f(69256347519, 129);
+f(136902082305, 255);
+f(137438953216, 256);
+f(137975824127, 257);
+f(274341035521, 511);
+f(274877906432, 512);
+f(275414777343, 513);
+f(549218941953, 1023);
+f(549755812864, 1024);
+f(550292683775, 1025);
+f(1098974754817, 2047);
+f(1099511625728, 2048);
+f(1100048496639, 2049);
+f(2198486380545, 4095);
+f(2199023251456, 4096);
+f(2199560122367, 4097);
+f(4397509632001, 8191);
+f(4398046502912, 8192);
+f(4398583373823, 8193);
+f(8795556134913, 16383);
+f(8796093005824, 16384);
+f(8796629876735, 16385);
+f(17591649140737, 32767);
+f(17592186011648, 32768);
+f(17592722882559, 32769);
+f(35183835152385, 65535);
+f(35184372023296, 65536);
+f(35184908894207, 65537);
+f(70368207175681, 131071);
+f(70368744046592, 131072);
+f(70369280917503, 131073);
+f(140736951222273, 262143);
+f(140737488093184, 262144);
+f(140738024964095, 262145);
+f(281474439315457, 524287);
+f(281474976186368, 524288);
+f(281475513057279, 524289);
+f(562949415501825, 1048575);
+f(562949952372736, 1048576);
+f(562950489243647, 1048577);
+f(1125899367874561, 2097151);
+f(1125899904745472, 2097152);
+f(1125900441616383, 2097153);
+x = 536870912;
+f(0, 0);
+f(536870912, 1);
+f(1073741824, 2);
+f(1610612736, 3);
+f(2147483648, 4);
+f(2684354560, 5);
+f(3758096384, 7);
+f(4294967296, 8);
+f(4831838208, 9);
+f(8053063680, 15);
+f(8589934592, 16);
+f(9126805504, 17);
+f(16642998272, 31);
+f(17179869184, 32);
+f(17716740096, 33);
+f(33822867456, 63);
+f(34359738368, 64);
+f(34896609280, 65);
+f(68182605824, 127);
+f(68719476736, 128);
+f(69256347648, 129);
+f(136902082560, 255);
+f(137438953472, 256);
+f(137975824384, 257);
+f(274341036032, 511);
+f(274877906944, 512);
+f(275414777856, 513);
+f(549218942976, 1023);
+f(549755813888, 1024);
+f(550292684800, 1025);
+f(1098974756864, 2047);
+f(1099511627776, 2048);
+f(1100048498688, 2049);
+f(2198486384640, 4095);
+f(2199023255552, 4096);
+f(2199560126464, 4097);
+f(4397509640192, 8191);
+f(4398046511104, 8192);
+f(4398583382016, 8193);
+f(8795556151296, 16383);
+f(8796093022208, 16384);
+f(8796629893120, 16385);
+f(17591649173504, 32767);
+f(17592186044416, 32768);
+f(17592722915328, 32769);
+f(35183835217920, 65535);
+f(35184372088832, 65536);
+f(35184908959744, 65537);
+f(70368207306752, 131071);
+f(70368744177664, 131072);
+f(70369281048576, 131073);
+f(140736951484416, 262143);
+f(140737488355328, 262144);
+f(140738025226240, 262145);
+f(281474439839744, 524287);
+f(281474976710656, 524288);
+f(281475513581568, 524289);
+f(562949416550400, 1048575);
+f(562949953421312, 1048576);
+f(562950490292224, 1048577);
+f(1125899369971712, 2097151);
+f(1125899906842624, 2097152);
+f(1125900443713536, 2097153);
diff --git a/deps/v8/test/mjsunit/mul-exhaustive-part9.js b/deps/v8/test/mjsunit/mul-exhaustive-part9.js
new file mode 100644
index 0000000000..f329a5a147
--- /dev/null
+++ b/deps/v8/test/mjsunit/mul-exhaustive-part9.js
@@ -0,0 +1,533 @@
+// Copyright 2008 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+var x;
+
+// Converts a number to string respecting -0.
+function stringify(n) {
+  if ((1 / n) === -Infinity) return "-0";
+  return String(n);
+}
+
+function f(expected, y) {
+  function testEval(string, x, y) {
+    var mulFunction = Function("x, y", "return " + string);
+    return mulFunction(x, y);
+  }
+  function mulTest(expected, x, y) {
+    assertEquals(expected, x * y);
+    assertEquals(expected, testEval(stringify(x) + " * y", x, y));
+    assertEquals(expected, testEval("x * " + stringify(y), x, y));
+    assertEquals(expected, testEval(stringify(x) + " * " + stringify(y), x, y));
+  }
+  mulTest(expected, x, y);
+  mulTest(-expected, -x, y);
+  mulTest(-expected, x, -y);
+  mulTest(expected, -x, -y);
+  if (x === y) return;  // Symmetric cases not necessary.
+  mulTest(expected, y, x);
+  mulTest(-expected, -y, x);
+  mulTest(-expected, y, -x);
+  mulTest(expected, -y, -x);
+}
+
+x = 536870913;
+f(0, 0);
+f(536870913, 1);
+f(1073741826, 2);
+f(1610612739, 3);
+f(2147483652, 4);
+f(2684354565, 5);
+f(3758096391, 7);
+f(4294967304, 8);
+f(4831838217, 9);
+f(8053063695, 15);
+f(8589934608, 16);
+f(9126805521, 17);
+f(16642998303, 31);
+f(17179869216, 32);
+f(17716740129, 33);
+f(33822867519, 63);
+f(34359738432, 64);
+f(34896609345, 65);
+f(68182605951, 127);
+f(68719476864, 128);
+f(69256347777, 129);
+f(136902082815, 255);
+f(137438953728, 256);
+f(137975824641, 257);
+f(274341036543, 511);
+f(274877907456, 512);
+f(275414778369, 513);
+f(549218943999, 1023);
+f(549755814912, 1024);
+f(550292685825, 1025);
+f(1098974758911, 2047);
+f(1099511629824, 2048);
+f(1100048500737, 2049);
+f(2198486388735, 4095);
+f(2199023259648, 4096);
+f(2199560130561, 4097);
+f(4397509648383, 8191);
+f(4398046519296, 8192);
+f(4398583390209, 8193);
+f(8795556167679, 16383);
+f(8796093038592, 16384);
+f(8796629909505, 16385);
+f(17591649206271, 32767);
+f(17592186077184, 32768);
+f(17592722948097, 32769);
+f(35183835283455, 65535);
+f(35184372154368, 65536);
+f(35184909025281, 65537);
+f(70368207437823, 131071);
+f(70368744308736, 131072);
+f(70369281179649, 131073);
+f(140736951746559, 262143);
+f(140737488617472, 262144);
+f(140738025488385, 262145);
+f(281474440364031, 524287);
+f(281474977234944, 524288);
+f(281475514105857, 524289);
+f(562949417598975, 1048575);
+f(562949954469888, 1048576);
+f(562950491340801, 1048577);
+f(1125899372068863, 2097151);
+f(1125899908939776, 2097152);
+f(1125900445810689, 2097153);
+x = 1073741823;
+f(0, 0);
+f(1073741823, 1);
+f(2147483646, 2);
+f(3221225469, 3);
+f(4294967292, 4);
+f(5368709115, 5);
+f(7516192761, 7);
+f(8589934584, 8);
+f(9663676407, 9);
+f(16106127345, 15);
+f(17179869168, 16);
+f(18253610991, 17);
+f(33285996513, 31);
+f(34359738336, 32);
+f(35433480159, 33);
+f(67645734849, 63);
+f(68719476672, 64);
+f(69793218495, 65);
+f(136365211521, 127);
+f(137438953344, 128);
+f(138512695167, 129);
+f(273804164865, 255);
+f(274877906688, 256);
+f(275951648511, 257);
+f(548682071553, 511);
+f(549755813376, 512);
+f(550829555199, 513);
+f(1098437884929, 1023);
+f(1099511626752, 1024);
+f(1100585368575, 1025);
+f(2197949511681, 2047);
+f(2199023253504, 2048);
+f(2200096995327, 2049);
+f(4396972765185, 4095);
+f(4398046507008, 4096);
+f(4399120248831, 4097);
+f(8795019272193, 8191);
+f(8796093014016, 8192);
+f(8797166755839, 8193);
+f(17591112286209, 16383);
+f(17592186028032, 16384);
+f(17593259769855, 16385);
+f(35183298314241, 32767);
+f(35184372056064, 32768);
+f(35185445797887, 32769);
+f(70367670370305, 65535);
+f(70368744112128, 65536);
+f(70369817853951, 65537);
+f(140736414482433, 131071);
+f(140737488224256, 131072);
+f(140738561966079, 131073);
+f(281473902706689, 262143);
+f(281474976448512, 262144);
+f(281476050190335, 262145);
+f(562948879155201, 524287);
+f(562949952897024, 524288);
+f(562951026638847, 524289);
+f(1125898832052225, 1048575);
+f(1125899905794048, 1048576);
+f(1125900979535871, 1048577);
+x = 1073741824;
+f(0, 0);
+f(1073741824, 1);
+f(2147483648, 2);
+f(3221225472, 3);
+f(4294967296, 4);
+f(5368709120, 5);
+f(7516192768, 7);
+f(8589934592, 8);
+f(9663676416, 9);
+f(16106127360, 15);
+f(17179869184, 16);
+f(18253611008, 17);
+f(33285996544, 31);
+f(34359738368, 32);
+f(35433480192, 33);
+f(67645734912, 63);
+f(68719476736, 64);
+f(69793218560, 65);
+f(136365211648, 127);
+f(137438953472, 128);
+f(138512695296, 129);
+f(273804165120, 255);
+f(274877906944, 256);
+f(275951648768, 257);
+f(548682072064, 511);
+f(549755813888, 512);
+f(550829555712, 513);
+f(1098437885952, 1023);
+f(1099511627776, 1024);
+f(1100585369600, 1025);
+f(2197949513728, 2047);
+f(2199023255552, 2048);
+f(2200096997376, 2049);
+f(4396972769280, 4095);
+f(4398046511104, 4096);
+f(4399120252928, 4097);
+f(8795019280384, 8191);
+f(8796093022208, 8192);
+f(8797166764032, 8193);
+f(17591112302592, 16383);
+f(17592186044416, 16384);
+f(17593259786240, 16385);
+f(35183298347008, 32767);
+f(35184372088832, 32768);
+f(35185445830656, 32769);
+f(70367670435840, 65535);
+f(70368744177664, 65536);
+f(70369817919488, 65537);
+f(140736414613504, 131071);
+f(140737488355328, 131072);
+f(140738562097152, 131073);
+f(281473902968832, 262143);
+f(281474976710656, 262144);
+f(281476050452480, 262145);
+f(562948879679488, 524287);
+f(562949953421312, 524288);
+f(562951027163136, 524289);
+f(1125898833100800, 1048575);
+f(1125899906842624, 1048576);
+f(1125900980584448, 1048577);
+x = 1073741825;
+f(0, 0);
+f(1073741825, 1);
+f(2147483650, 2);
+f(3221225475, 3);
+f(4294967300, 4);
+f(5368709125, 5);
+f(7516192775, 7);
+f(8589934600, 8);
+f(9663676425, 9);
+f(16106127375, 15);
+f(17179869200, 16);
+f(18253611025, 17);
+f(33285996575, 31);
+f(34359738400, 32);
+f(35433480225, 33);
+f(67645734975, 63);
+f(68719476800, 64);
+f(69793218625, 65);
+f(136365211775, 127);
+f(137438953600, 128);
+f(138512695425, 129);
+f(273804165375, 255);
+f(274877907200, 256);
+f(275951649025, 257);
+f(548682072575, 511);
+f(549755814400, 512);
+f(550829556225, 513);
+f(1098437886975, 1023);
+f(1099511628800, 1024);
+f(1100585370625, 1025);
+f(2197949515775, 2047);
+f(2199023257600, 2048);
+f(2200096999425, 2049);
+f(4396972773375, 4095);
+f(4398046515200, 4096);
+f(4399120257025, 4097);
+f(8795019288575, 8191);
+f(8796093030400, 8192);
+f(8797166772225, 8193);
+f(17591112318975, 16383);
+f(17592186060800, 16384);
+f(17593259802625, 16385);
+f(35183298379775, 32767);
+f(35184372121600, 32768);
+f(35185445863425, 32769);
+f(70367670501375, 65535);
+f(70368744243200, 65536);
+f(70369817985025, 65537);
+f(140736414744575, 131071);
+f(140737488486400, 131072);
+f(140738562228225, 131073);
+f(281473903230975, 262143);
+f(281474976972800, 262144);
+f(281476050714625, 262145);
+f(562948880203775, 524287);
+f(562949953945600, 524288);
+f(562951027687425, 524289);
+f(1125898834149375, 1048575);
+f(1125899907891200, 1048576);
+f(1125900981633025, 1048577);
+x = 2147483647;
+f(0, 0);
+f(2147483647, 1);
+f(4294967294, 2);
+f(6442450941, 3);
+f(8589934588, 4);
+f(10737418235, 5);
+f(15032385529, 7);
+f(17179869176, 8);
+f(19327352823, 9);
+f(32212254705, 15);
+f(34359738352, 16);
+f(36507221999, 17);
+f(66571993057, 31);
+f(68719476704, 32);
+f(70866960351, 33);
+f(135291469761, 63);
+f(137438953408, 64);
+f(139586437055, 65);
+f(272730423169, 127);
+f(274877906816, 128);
+f(277025390463, 129);
+f(547608329985, 255);
+f(549755813632, 256);
+f(551903297279, 257);
+f(1097364143617, 511);
+f(1099511627264, 512);
+f(1101659110911, 513);
+f(2196875770881, 1023);
+f(2199023254528, 1024);
+f(2201170738175, 1025);
+f(4395899025409, 2047);
+f(4398046509056, 2048);
+f(4400193992703, 2049);
+f(8793945534465, 4095);
+f(8796093018112, 4096);
+f(8798240501759, 4097);
+f(17590038552577, 8191);
+f(17592186036224, 8192);
+f(17594333519871, 8193);
+f(35182224588801, 16383);
+f(35184372072448, 16384);
+f(35186519556095, 16385);
+f(70366596661249, 32767);
+f(70368744144896, 32768);
+f(70370891628543, 32769);
+f(140735340806145, 65535);
+f(140737488289792, 65536);
+f(140739635773439, 65537);
+f(281472829095937, 131071);
+f(281474976579584, 131072);
+f(281477124063231, 131073);
+f(562947805675521, 262143);
+f(562949953159168, 262144);
+f(562952100642815, 262145);
+f(1125897758834689, 524287);
+f(1125899906318336, 524288);
+f(1125902053801983, 524289);
+x = 2147483648;
+f(0, 0);
+f(2147483648, 1);
+f(4294967296, 2);
+f(6442450944, 3);
+f(8589934592, 4);
+f(10737418240, 5);
+f(15032385536, 7);
+f(17179869184, 8);
+f(19327352832, 9);
+f(32212254720, 15);
+f(34359738368, 16);
+f(36507222016, 17);
+f(66571993088, 31);
+f(68719476736, 32);
+f(70866960384, 33);
+f(135291469824, 63);
+f(137438953472, 64);
+f(139586437120, 65);
+f(272730423296, 127);
+f(274877906944, 128);
+f(277025390592, 129);
+f(547608330240, 255);
+f(549755813888, 256);
+f(551903297536, 257);
+f(1097364144128, 511);
+f(1099511627776, 512);
+f(1101659111424, 513);
+f(2196875771904, 1023);
+f(2199023255552, 1024);
+f(2201170739200, 1025);
+f(4395899027456, 2047);
+f(4398046511104, 2048);
+f(4400193994752, 2049);
+f(8793945538560, 4095);
+f(8796093022208, 4096);
+f(8798240505856, 4097);
+f(17590038560768, 8191);
+f(17592186044416, 8192);
+f(17594333528064, 8193);
+f(35182224605184, 16383);
+f(35184372088832, 16384);
+f(35186519572480, 16385);
+f(70366596694016, 32767);
+f(70368744177664, 32768);
+f(70370891661312, 32769);
+f(140735340871680, 65535);
+f(140737488355328, 65536);
+f(140739635838976, 65537);
+f(281472829227008, 131071);
+f(281474976710656, 131072);
+f(281477124194304, 131073);
+f(562947805937664, 262143);
+f(562949953421312, 262144);
+f(562952100904960, 262145);
+f(1125897759358976, 524287);
+f(1125899906842624, 524288);
+f(1125902054326272, 524289);
+x = 2147483649;
+f(0, 0);
+f(2147483649, 1);
+f(4294967298, 2);
+f(6442450947, 3);
+f(8589934596, 4);
+f(10737418245, 5);
+f(15032385543, 7);
+f(17179869192, 8);
+f(19327352841, 9);
+f(32212254735, 15);
+f(34359738384, 16);
+f(36507222033, 17);
+f(66571993119, 31);
+f(68719476768, 32);
+f(70866960417, 33);
+f(135291469887, 63);
+f(137438953536, 64);
+f(139586437185, 65);
+f(272730423423, 127);
+f(274877907072, 128);
+f(277025390721, 129);
+f(547608330495, 255);
+f(549755814144, 256);
+f(551903297793, 257);
+f(1097364144639, 511);
+f(1099511628288, 512);
+f(1101659111937, 513);
+f(2196875772927, 1023);
+f(2199023256576, 1024);
+f(2201170740225, 1025);
+f(4395899029503, 2047);
+f(4398046513152, 2048);
+f(4400193996801, 2049);
+f(8793945542655, 4095);
+f(8796093026304, 4096);
+f(8798240509953, 4097);
+f(17590038568959, 8191);
+f(17592186052608, 8192);
+f(17594333536257, 8193);
+f(35182224621567, 16383);
+f(35184372105216, 16384);
+f(35186519588865, 16385);
+f(70366596726783, 32767);
+f(70368744210432, 32768);
+f(70370891694081, 32769);
+f(140735340937215, 65535);
+f(140737488420864, 65536);
+f(140739635904513, 65537);
+f(281472829358079, 131071);
+f(281474976841728, 131072);
+f(281477124325377, 131073);
+f(562947806199807, 262143);
+f(562949953683456, 262144);
+f(562952101167105, 262145);
+f(1125897759883263, 524287);
+f(1125899907366912, 524288);
+f(1125902054850561, 524289);
+x = 4294967295;
+f(0, 0);
+f(4294967295, 1);
+f(8589934590, 2);
+f(12884901885, 3);
+f(17179869180, 4);
+f(21474836475, 5);
+f(30064771065, 7);
+f(34359738360, 8);
+f(38654705655, 9);
+f(64424509425, 15);
+f(68719476720, 16);
+f(73014444015, 17);
+f(133143986145, 31);
+f(137438953440, 32);
+f(141733920735, 33);
+f(270582939585, 63);
+f(274877906880, 64);
+f(279172874175, 65);
+f(545460846465, 127);
+f(549755813760, 128);
+f(554050781055, 129);
+f(1095216660225, 255);
+f(1099511627520, 256);
+f(1103806594815, 257);
+f(2194728287745, 511);
+f(2199023255040, 512);
+f(2203318222335, 513);
+f(4393751542785, 1023);
+f(4398046510080, 1024);
+f(4402341477375, 1025);
+f(8791798052865, 2047);
+f(8796093020160, 2048);
+f(8800387987455, 2049);
+f(17587891073025, 4095);
+f(17592186040320, 4096);
+f(17596481007615, 4097);
+f(35180077113345, 8191);
+f(35184372080640, 8192);
+f(35188667047935, 8193);
+f(70364449193985, 16383);
+f(70368744161280, 16384);
+f(70373039128575, 16385);
+f(140733193355265, 32767);
+f(140737488322560, 32768);
+f(140741783289855, 32769);
+f(281470681677825, 65535);
+f(281474976645120, 65536);
+f(281479271612415, 65537);
+f(562945658322945, 131071);
+f(562949953290240, 131072);
+f(562954248257535, 131073);
+f(1125895611613185, 262143);
+f(1125899906580480, 262144);
+f(1125904201547775, 262145);
diff --git a/deps/v8/test/mjsunit/mul-exhaustive.js b/deps/v8/test/mjsunit/mul-exhaustive.js
deleted file mode 100644
index 12689db32b..0000000000
--- a/deps/v8/test/mjsunit/mul-exhaustive.js
+++ /dev/null
@@ -1,4629 +0,0 @@
-// Copyright 2008 the V8 project authors. All rights reserved.
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-//       notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-//       copyright notice, this list of conditions and the following
-//       disclaimer in the documentation and/or other materials provided
-//       with the distribution.
-//     * Neither the name of Google Inc. nor the names of its
-//       contributors may be used to endorse or promote products derived
-//       from this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-var x;
-
-// Converts a number to string respecting -0.
-function stringify(n) {
-  if ((1 / n) === -Infinity) return "-0";
-  return String(n);
-}
-
-function f(expected, y) {
-  function testEval(string, x, y) {
-    var mulFunction = Function("x, y", "return " + string);
-    return mulFunction(x, y);
-  }
-  function mulTest(expected, x, y) {
-    assertEquals(expected, x * y);
-    assertEquals(expected, testEval(stringify(x) + " * y", x, y));
-    assertEquals(expected, testEval("x * " + stringify(y), x, y));
-    assertEquals(expected, testEval(stringify(x) + " * " + stringify(y), x, y));
-  }
-  mulTest(expected, x, y);
-  mulTest(-expected, -x, y);
-  mulTest(-expected, x, -y);
-  mulTest(expected, -x, -y);
-  if (x === y) return;  // Symmetric cases not necessary.
-  mulTest(expected, y, x);
-  mulTest(-expected, -y, x);
-  mulTest(-expected, y, -x);
-  mulTest(expected, -y, -x);
-}
-
-x = 0;
-f(0, 0);
-x = 1;
-f(0, 0);
-f(1, 1);
-x = 2;
-f(0, 0);
-f(2, 1);
-f(4, 2);
-x = 3;
-f(0, 0);
-f(3, 1);
-f(6, 2);
-f(9, 3);
-x = 4;
-f(0, 0);
-f(4, 1);
-f(8, 2);
-f(12, 3);
-f(16, 4);
-x = 5;
-f(0, 0);
-f(5, 1);
-f(10, 2);
-f(15, 3);
-f(20, 4);
-f(25, 5);
-x = 7;
-f(0, 0);
-f(7, 1);
-f(14, 2);
-f(21, 3);
-f(28, 4);
-f(35, 5);
-f(49, 7);
-x = 8;
-f(0, 0);
-f(8, 1);
-f(16, 2);
-f(24, 3);
-f(32, 4);
-f(40, 5);
-f(56, 7);
-f(64, 8);
-x = 9;
-f(0, 0);
-f(9, 1);
-f(18, 2);
-f(27, 3);
-f(36, 4);
-f(45, 5);
-f(63, 7);
-f(72, 8);
-f(81, 9);
-x = 15;
-f(0, 0);
-f(15, 1);
-f(30, 2);
-f(45, 3);
-f(60, 4);
-f(75, 5);
-f(105, 7);
-f(120, 8);
-f(135, 9);
-f(225, 15);
-x = 16;
-f(0, 0);
-f(16, 1);
-f(32, 2);
-f(48, 3);
-f(64, 4);
-f(80, 5);
-f(112, 7);
-f(128, 8);
-f(144, 9);
-f(240, 15);
-f(256, 16);
-x = 17;
-f(0, 0);
-f(17, 1);
-f(34, 2);
-f(51, 3);
-f(68, 4);
-f(85, 5);
-f(119, 7);
-f(136, 8);
-f(153, 9);
-f(255, 15);
-f(272, 16);
-f(289, 17);
-x = 31;
-f(0, 0);
-f(31, 1);
-f(62, 2);
-f(93, 3);
-f(124, 4);
-f(155, 5);
-f(217, 7);
-f(248, 8);
-f(279, 9);
-f(465, 15);
-f(496, 16);
-f(527, 17);
-f(961, 31);
-x = 32;
-f(0, 0);
-f(32, 1);
-f(64, 2);
-f(96, 3);
-f(128, 4);
-f(160, 5);
-f(224, 7);
-f(256, 8);
-f(288, 9);
-f(480, 15);
-f(512, 16);
-f(544, 17);
-f(992, 31);
-f(1024, 32);
-x = 33;
-f(0, 0);
-f(33, 1);
-f(66, 2);
-f(99, 3);
-f(132, 4);
-f(165, 5);
-f(231, 7);
-f(264, 8);
-f(297, 9);
-f(495, 15);
-f(528, 16);
-f(561, 17);
-f(1023, 31);
-f(1056, 32);
-f(1089, 33);
-x = 63;
-f(0, 0);
-f(63, 1);
-f(126, 2);
-f(189, 3);
-f(252, 4);
-f(315, 5);
-f(441, 7);
-f(504, 8);
-f(567, 9);
-f(945, 15);
-f(1008, 16);
-f(1071, 17);
-f(1953, 31);
-f(2016, 32);
-f(2079, 33);
-f(3969, 63);
-x = 64;
-f(0, 0);
-f(64, 1);
-f(128, 2);
-f(192, 3);
-f(256, 4);
-f(320, 5);
-f(448, 7);
-f(512, 8);
-f(576, 9);
-f(960, 15);
-f(1024, 16);
-f(1088, 17);
-f(1984, 31);
-f(2048, 32);
-f(2112, 33);
-f(4032, 63);
-f(4096, 64);
-x = 65;
-f(0, 0);
-f(65, 1);
-f(130, 2);
-f(195, 3);
-f(260, 4);
-f(325, 5);
-f(455, 7);
-f(520, 8);
-f(585, 9);
-f(975, 15);
-f(1040, 16);
-f(1105, 17);
-f(2015, 31);
-f(2080, 32);
-f(2145, 33);
-f(4095, 63);
-f(4160, 64);
-f(4225, 65);
-x = 127;
-f(0, 0);
-f(127, 1);
-f(254, 2);
-f(381, 3);
-f(508, 4);
-f(635, 5);
-f(889, 7);
-f(1016, 8);
-f(1143, 9);
-f(1905, 15);
-f(2032, 16);
-f(2159, 17);
-f(3937, 31);
-f(4064, 32);
-f(4191, 33);
-f(8001, 63);
-f(8128, 64);
-f(8255, 65);
-f(16129, 127);
-x = 128;
-f(0, 0);
-f(128, 1);
-f(256, 2);
-f(384, 3);
-f(512, 4);
-f(640, 5);
-f(896, 7);
-f(1024, 8);
-f(1152, 9);
-f(1920, 15);
-f(2048, 16);
-f(2176, 17);
-f(3968, 31);
-f(4096, 32);
-f(4224, 33);
-f(8064, 63);
-f(8192, 64);
-f(8320, 65);
-f(16256, 127);
-f(16384, 128);
-x = 129;
-f(0, 0);
-f(129, 1);
-f(258, 2);
-f(387, 3);
-f(516, 4);
-f(645, 5);
-f(903, 7);
-f(1032, 8);
-f(1161, 9);
-f(1935, 15);
-f(2064, 16);
-f(2193, 17);
-f(3999, 31);
-f(4128, 32);
-f(4257, 33);
-f(8127, 63);
-f(8256, 64);
-f(8385, 65);
-f(16383, 127);
-f(16512, 128);
-f(16641, 129);
-x = 255;
-f(0, 0);
-f(255, 1);
-f(510, 2);
-f(765, 3);
-f(1020, 4);
-f(1275, 5);
-f(1785, 7);
-f(2040, 8);
-f(2295, 9);
-f(3825, 15);
-f(4080, 16);
-f(4335, 17);
-f(7905, 31);
-f(8160, 32);
-f(8415, 33);
-f(16065, 63);
-f(16320, 64);
-f(16575, 65);
-f(32385, 127);
-f(32640, 128);
-f(32895, 129);
-f(65025, 255);
-x = 256;
-f(0, 0);
-f(256, 1);
-f(512, 2);
-f(768, 3);
-f(1024, 4);
-f(1280, 5);
-f(1792, 7);
-f(2048, 8);
-f(2304, 9);
-f(3840, 15);
-f(4096, 16);
-f(4352, 17);
-f(7936, 31);
-f(8192, 32);
-f(8448, 33);
-f(16128, 63);
-f(16384, 64);
-f(16640, 65);
-f(32512, 127);
-f(32768, 128);
-f(33024, 129);
-f(65280, 255);
-f(65536, 256);
-x = 257;
-f(0, 0);
-f(257, 1);
-f(514, 2);
-f(771, 3);
-f(1028, 4);
-f(1285, 5);
-f(1799, 7);
-f(2056, 8);
-f(2313, 9);
-f(3855, 15);
-f(4112, 16);
-f(4369, 17);
-f(7967, 31);
-f(8224, 32);
-f(8481, 33);
-f(16191, 63);
-f(16448, 64);
-f(16705, 65);
-f(32639, 127);
-f(32896, 128);
-f(33153, 129);
-f(65535, 255);
-f(65792, 256);
-f(66049, 257);
-x = 511;
-f(0, 0);
-f(511, 1);
-f(1022, 2);
-f(1533, 3);
-f(2044, 4);
-f(2555, 5);
-f(3577, 7);
-f(4088, 8);
-f(4599, 9);
-f(7665, 15);
-f(8176, 16);
-f(8687, 17);
-f(15841, 31);
-f(16352, 32);
-f(16863, 33);
-f(32193, 63);
-f(32704, 64);
-f(33215, 65);
-f(64897, 127);
-f(65408, 128);
-f(65919, 129);
-f(130305, 255);
-f(130816, 256);
-f(131327, 257);
-f(261121, 511);
-x = 512;
-f(0, 0);
-f(512, 1);
-f(1024, 2);
-f(1536, 3);
-f(2048, 4);
-f(2560, 5);
-f(3584, 7);
-f(4096, 8);
-f(4608, 9);
-f(7680, 15);
-f(8192, 16);
-f(8704, 17);
-f(15872, 31);
-f(16384, 32);
-f(16896, 33);
-f(32256, 63);
-f(32768, 64);
-f(33280, 65);
-f(65024, 127);
-f(65536, 128);
-f(66048, 129);
-f(130560, 255);
-f(131072, 256);
-f(131584, 257);
-f(261632, 511);
-f(262144, 512);
-x = 513;
-f(0, 0);
-f(513, 1);
-f(1026, 2);
-f(1539, 3);
-f(2052, 4);
-f(2565, 5);
-f(3591, 7);
-f(4104, 8);
-f(4617, 9);
-f(7695, 15);
-f(8208, 16);
-f(8721, 17);
-f(15903, 31);
-f(16416, 32);
-f(16929, 33);
-f(32319, 63);
-f(32832, 64);
-f(33345, 65);
-f(65151, 127);
-f(65664, 128);
-f(66177, 129);
-f(130815, 255);
-f(131328, 256);
-f(131841, 257);
-f(262143, 511);
-f(262656, 512);
-f(263169, 513);
-x = 1023;
-f(0, 0);
-f(1023, 1);
-f(2046, 2);
-f(3069, 3);
-f(4092, 4);
-f(5115, 5);
-f(7161, 7);
-f(8184, 8);
-f(9207, 9);
-f(15345, 15);
-f(16368, 16);
-f(17391, 17);
-f(31713, 31);
-f(32736, 32);
-f(33759, 33);
-f(64449, 63);
-f(65472, 64);
-f(66495, 65);
-f(129921, 127);
-f(130944, 128);
-f(131967, 129);
-f(260865, 255);
-f(261888, 256);
-f(262911, 257);
-f(522753, 511);
-f(523776, 512);
-f(524799, 513);
-f(1046529, 1023);
-x = 1024;
-f(0, 0);
-f(1024, 1);
-f(2048, 2);
-f(3072, 3);
-f(4096, 4);
-f(5120, 5);
-f(7168, 7);
-f(8192, 8);
-f(9216, 9);
-f(15360, 15);
-f(16384, 16);
-f(17408, 17);
-f(31744, 31);
-f(32768, 32);
-f(33792, 33);
-f(64512, 63);
-f(65536, 64);
-f(66560, 65);
-f(130048, 127);
-f(131072, 128);
-f(132096, 129);
-f(261120, 255);
-f(262144, 256);
-f(263168, 257);
-f(523264, 511);
-f(524288, 512);
-f(525312, 513);
-f(1047552, 1023);
-f(1048576, 1024);
-x = 1025;
-f(0, 0);
-f(1025, 1);
-f(2050, 2);
-f(3075, 3);
-f(4100, 4);
-f(5125, 5);
-f(7175, 7);
-f(8200, 8);
-f(9225, 9);
-f(15375, 15);
-f(16400, 16);
-f(17425, 17);
-f(31775, 31);
-f(32800, 32);
-f(33825, 33);
-f(64575, 63);
-f(65600, 64);
-f(66625, 65);
-f(130175, 127);
-f(131200, 128);
-f(132225, 129);
-f(261375, 255);
-f(262400, 256);
-f(263425, 257);
-f(523775, 511);
-f(524800, 512);
-f(525825, 513);
-f(1048575, 1023);
-f(1049600, 1024);
-f(1050625, 1025);
-x = 2047;
-f(0, 0);
-f(2047, 1);
-f(4094, 2);
-f(6141, 3);
-f(8188, 4);
-f(10235, 5);
-f(14329, 7);
-f(16376, 8);
-f(18423, 9);
-f(30705, 15);
-f(32752, 16);
-f(34799, 17);
-f(63457, 31);
-f(65504, 32);
-f(67551, 33);
-f(128961, 63);
-f(131008, 64);
-f(133055, 65);
-f(259969, 127);
-f(262016, 128);
-f(264063, 129);
-f(521985, 255);
-f(524032, 256);
-f(526079, 257);
-f(1046017, 511);
-f(1048064, 512);
-f(1050111, 513);
-f(2094081, 1023);
-f(2096128, 1024);
-f(2098175, 1025);
-f(4190209, 2047);
-x = 2048;
-f(0, 0);
-f(2048, 1);
-f(4096, 2);
-f(6144, 3);
-f(8192, 4);
-f(10240, 5);
-f(14336, 7);
-f(16384, 8);
-f(18432, 9);
-f(30720, 15);
-f(32768, 16);
-f(34816, 17);
-f(63488, 31);
-f(65536, 32);
-f(67584, 33);
-f(129024, 63);
-f(131072, 64);
-f(133120, 65);
-f(260096, 127);
-f(262144, 128);
-f(264192, 129);
-f(522240, 255);
-f(524288, 256);
-f(526336, 257);
-f(1046528, 511);
-f(1048576, 512);
-f(1050624, 513);
-f(2095104, 1023);
-f(2097152, 1024);
-f(2099200, 1025);
-f(4192256, 2047);
-f(4194304, 2048);
-x = 2049;
-f(0, 0);
-f(2049, 1);
-f(4098, 2);
-f(6147, 3);
-f(8196, 4);
-f(10245, 5);
-f(14343, 7);
-f(16392, 8);
-f(18441, 9);
-f(30735, 15);
-f(32784, 16);
-f(34833, 17);
-f(63519, 31);
-f(65568, 32);
-f(67617, 33);
-f(129087, 63);
-f(131136, 64);
-f(133185, 65);
-f(260223, 127);
-f(262272, 128);
-f(264321, 129);
-f(522495, 255);
-f(524544, 256);
-f(526593, 257);
-f(1047039, 511);
-f(1049088, 512);
-f(1051137, 513);
-f(2096127, 1023);
-f(2098176, 1024);
-f(2100225, 1025);
-f(4194303, 2047);
-f(4196352, 2048);
-f(4198401, 2049);
-x = 4095;
-f(0, 0);
-f(4095, 1);
-f(8190, 2);
-f(12285, 3);
-f(16380, 4);
-f(20475, 5);
-f(28665, 7);
-f(32760, 8);
-f(36855, 9);
-f(61425, 15);
-f(65520, 16);
-f(69615, 17);
-f(126945, 31);
-f(131040, 32);
-f(135135, 33);
-f(257985, 63);
-f(262080, 64);
-f(266175, 65);
-f(520065, 127);
-f(524160, 128);
-f(528255, 129);
-f(1044225, 255);
-f(1048320, 256);
-f(1052415, 257);
-f(2092545, 511);
-f(2096640, 512);
-f(2100735, 513);
-f(4189185, 1023);
-f(4193280, 1024);
-f(4197375, 1025);
-f(8382465, 2047);
-f(8386560, 2048);
-f(8390655, 2049);
-f(16769025, 4095);
-x = 4096;
-f(0, 0);
-f(4096, 1);
-f(8192, 2);
-f(12288, 3);
-f(16384, 4);
-f(20480, 5);
-f(28672, 7);
-f(32768, 8);
-f(36864, 9);
-f(61440, 15);
-f(65536, 16);
-f(69632, 17);
-f(126976, 31);
-f(131072, 32);
-f(135168, 33);
-f(258048, 63);
-f(262144, 64);
-f(266240, 65);
-f(520192, 127);
-f(524288, 128);
-f(528384, 129);
-f(1044480, 255);
-f(1048576, 256);
-f(1052672, 257);
-f(2093056, 511);
-f(2097152, 512);
-f(2101248, 513);
-f(4190208, 1023);
-f(4194304, 1024);
-f(4198400, 1025);
-f(8384512, 2047);
-f(8388608, 2048);
-f(8392704, 2049);
-f(16773120, 4095);
-f(16777216, 4096);
-x = 4097;
-f(0, 0);
-f(4097, 1);
-f(8194, 2);
-f(12291, 3);
-f(16388, 4);
-f(20485, 5);
-f(28679, 7);
-f(32776, 8);
-f(36873, 9);
-f(61455, 15);
-f(65552, 16);
-f(69649, 17);
-f(127007, 31);
-f(131104, 32);
-f(135201, 33);
-f(258111, 63);
-f(262208, 64);
-f(266305, 65);
-f(520319, 127);
-f(524416, 128);
-f(528513, 129);
-f(1044735, 255);
-f(1048832, 256);
-f(1052929, 257);
-f(2093567, 511);
-f(2097664, 512);
-f(2101761, 513);
-f(4191231, 1023);
-f(4195328, 1024);
-f(4199425, 1025);
-f(8386559, 2047);
-f(8390656, 2048);
-f(8394753, 2049);
-f(16777215, 4095);
-f(16781312, 4096);
-f(16785409, 4097);
-x = 8191;
-f(0, 0);
-f(8191, 1);
-f(16382, 2);
-f(24573, 3);
-f(32764, 4);
-f(40955, 5);
-f(57337, 7);
-f(65528, 8);
-f(73719, 9);
-f(122865, 15);
-f(131056, 16);
-f(139247, 17);
-f(253921, 31);
-f(262112, 32);
-f(270303, 33);
-f(516033, 63);
-f(524224, 64);
-f(532415, 65);
-f(1040257, 127);
-f(1048448, 128);
-f(1056639, 129);
-f(2088705, 255);
-f(2096896, 256);
-f(2105087, 257);
-f(4185601, 511);
-f(4193792, 512);
-f(4201983, 513);
-f(8379393, 1023);
-f(8387584, 1024);
-f(8395775, 1025);
-f(16766977, 2047);
-f(16775168, 2048);
-f(16783359, 2049);
-f(33542145, 4095);
-f(33550336, 4096);
-f(33558527, 4097);
-f(67092481, 8191);
-x = 8192;
-f(0, 0);
-f(8192, 1);
-f(16384, 2);
-f(24576, 3);
-f(32768, 4);
-f(40960, 5);
-f(57344, 7);
-f(65536, 8);
-f(73728, 9);
-f(122880, 15);
-f(131072, 16);
-f(139264, 17);
-f(253952, 31);
-f(262144, 32);
-f(270336, 33);
-f(516096, 63);
-f(524288, 64);
-f(532480, 65);
-f(1040384, 127);
-f(1048576, 128);
-f(1056768, 129);
-f(2088960, 255);
-f(2097152, 256);
-f(2105344, 257);
-f(4186112, 511);
-f(4194304, 512);
-f(4202496, 513);
-f(8380416, 1023);
-f(8388608, 1024);
-f(8396800, 1025);
-f(16769024, 2047);
-f(16777216, 2048);
-f(16785408, 2049);
-f(33546240, 4095);
-f(33554432, 4096);
-f(33562624, 4097);
-f(67100672, 8191);
-f(67108864, 8192);
-x = 8193;
-f(0, 0);
-f(8193, 1);
-f(16386, 2);
-f(24579, 3);
-f(32772, 4);
-f(40965, 5);
-f(57351, 7);
-f(65544, 8);
-f(73737, 9);
-f(122895, 15);
-f(131088, 16);
-f(139281, 17);
-f(253983, 31);
-f(262176, 32);
-f(270369, 33);
-f(516159, 63);
-f(524352, 64);
-f(532545, 65);
-f(1040511, 127);
-f(1048704, 128);
-f(1056897, 129);
-f(2089215, 255);
-f(2097408, 256);
-f(2105601, 257);
-f(4186623, 511);
-f(4194816, 512);
-f(4203009, 513);
-f(8381439, 1023);
-f(8389632, 1024);
-f(8397825, 1025);
-f(16771071, 2047);
-f(16779264, 2048);
-f(16787457, 2049);
-f(33550335, 4095);
-f(33558528, 4096);
-f(33566721, 4097);
-f(67108863, 8191);
-f(67117056, 8192);
-f(67125249, 8193);
-x = 16383;
-f(0, 0);
-f(16383, 1);
-f(32766, 2);
-f(49149, 3);
-f(65532, 4);
-f(81915, 5);
-f(114681, 7);
-f(131064, 8);
-f(147447, 9);
-f(245745, 15);
-f(262128, 16);
-f(278511, 17);
-f(507873, 31);
-f(524256, 32);
-f(540639, 33);
-f(1032129, 63);
-f(1048512, 64);
-f(1064895, 65);
-f(2080641, 127);
-f(2097024, 128);
-f(2113407, 129);
-f(4177665, 255);
-f(4194048, 256);
-f(4210431, 257);
-f(8371713, 511);
-f(8388096, 512);
-f(8404479, 513);
-f(16759809, 1023);
-f(16776192, 1024);
-f(16792575, 1025);
-f(33536001, 2047);
-f(33552384, 2048);
-f(33568767, 2049);
-f(67088385, 4095);
-f(67104768, 4096);
-f(67121151, 4097);
-f(134193153, 8191);
-f(134209536, 8192);
-f(134225919, 8193);
-f(268402689, 16383);
-x = 16384;
-f(0, 0);
-f(16384, 1);
-f(32768, 2);
-f(49152, 3);
-f(65536, 4);
-f(81920, 5);
-f(114688, 7);
-f(131072, 8);
-f(147456, 9);
-f(245760, 15);
-f(262144, 16);
-f(278528, 17);
-f(507904, 31);
-f(524288, 32);
-f(540672, 33);
-f(1032192, 63);
-f(1048576, 64);
-f(1064960, 65);
-f(2080768, 127);
-f(2097152, 128);
-f(2113536, 129);
-f(4177920, 255);
-f(4194304, 256);
-f(4210688, 257);
-f(8372224, 511);
-f(8388608, 512);
-f(8404992, 513);
-f(16760832, 1023);
-f(16777216, 1024);
-f(16793600, 1025);
-f(33538048, 2047);
-f(33554432, 2048);
-f(33570816, 2049);
-f(67092480, 4095);
-f(67108864, 4096);
-f(67125248, 4097);
-f(134201344, 8191);
-f(134217728, 8192);
-f(134234112, 8193);
-f(268419072, 16383);
-f(268435456, 16384);
-x = 16385;
-f(0, 0);
-f(16385, 1);
-f(32770, 2);
-f(49155, 3);
-f(65540, 4);
-f(81925, 5);
-f(114695, 7);
-f(131080, 8);
-f(147465, 9);
-f(245775, 15);
-f(262160, 16);
-f(278545, 17);
-f(507935, 31);
-f(524320, 32);
-f(540705, 33);
-f(1032255, 63);
-f(1048640, 64);
-f(1065025, 65);
-f(2080895, 127);
-f(2097280, 128);
-f(2113665, 129);
-f(4178175, 255);
-f(4194560, 256);
-f(4210945, 257);
-f(8372735, 511);
-f(8389120, 512);
-f(8405505, 513);
-f(16761855, 1023);
-f(16778240, 1024);
-f(16794625, 1025);
-f(33540095, 2047);
-f(33556480, 2048);
-f(33572865, 2049);
-f(67096575, 4095);
-f(67112960, 4096);
-f(67129345, 4097);
-f(134209535, 8191);
-f(134225920, 8192);
-f(134242305, 8193);
-f(268435455, 16383);
-f(268451840, 16384);
-f(268468225, 16385);
-x = 32767;
-f(0, 0);
-f(32767, 1);
-f(65534, 2);
-f(98301, 3);
-f(131068, 4);
-f(163835, 5);
-f(229369, 7);
-f(262136, 8);
-f(294903, 9);
-f(491505, 15);
-f(524272, 16);
-f(557039, 17);
-f(1015777, 31);
-f(1048544, 32);
-f(1081311, 33);
-f(2064321, 63);
-f(2097088, 64);
-f(2129855, 65);
-f(4161409, 127);
-f(4194176, 128);
-f(4226943, 129);
-f(8355585, 255);
-f(8388352, 256);
-f(8421119, 257);
-f(16743937, 511);
-f(16776704, 512);
-f(16809471, 513);
-f(33520641, 1023);
-f(33553408, 1024);
-f(33586175, 1025);
-f(67074049, 2047);
-f(67106816, 2048);
-f(67139583, 2049);
-f(134180865, 4095);
-f(134213632, 4096);
-f(134246399, 4097);
-f(268394497, 8191);
-f(268427264, 8192);
-f(268460031, 8193);
-f(536821761, 16383);
-f(536854528, 16384);
-f(536887295, 16385);
-f(1073676289, 32767);
-x = 32768;
-f(0, 0);
-f(32768, 1);
-f(65536, 2);
-f(98304, 3);
-f(131072, 4);
-f(163840, 5);
-f(229376, 7);
-f(262144, 8);
-f(294912, 9);
-f(491520, 15);
-f(524288, 16);
-f(557056, 17);
-f(1015808, 31);
-f(1048576, 32);
-f(1081344, 33);
-f(2064384, 63);
-f(2097152, 64);
-f(2129920, 65);
-f(4161536, 127);
-f(4194304, 128);
-f(4227072, 129);
-f(8355840, 255);
-f(8388608, 256);
-f(8421376, 257);
-f(16744448, 511);
-f(16777216, 512);
-f(16809984, 513);
-f(33521664, 1023);
-f(33554432, 1024);
-f(33587200, 1025);
-f(67076096, 2047);
-f(67108864, 2048);
-f(67141632, 2049);
-f(134184960, 4095);
-f(134217728, 4096);
-f(134250496, 4097);
-f(268402688, 8191);
-f(268435456, 8192);
-f(268468224, 8193);
-f(536838144, 16383);
-f(536870912, 16384);
-f(536903680, 16385);
-f(1073709056, 32767);
-f(1073741824, 32768);
-x = 32769;
-f(0, 0);
-f(32769, 1);
-f(65538, 2);
-f(98307, 3);
-f(131076, 4);
-f(163845, 5);
-f(229383, 7);
-f(262152, 8);
-f(294921, 9);
-f(491535, 15);
-f(524304, 16);
-f(557073, 17);
-f(1015839, 31);
-f(1048608, 32);
-f(1081377, 33);
-f(2064447, 63);
-f(2097216, 64);
-f(2129985, 65);
-f(4161663, 127);
-f(4194432, 128);
-f(4227201, 129);
-f(8356095, 255);
-f(8388864, 256);
-f(8421633, 257);
-f(16744959, 511);
-f(16777728, 512);
-f(16810497, 513);
-f(33522687, 1023);
-f(33555456, 1024);
-f(33588225, 1025);
-f(67078143, 2047);
-f(67110912, 2048);
-f(67143681, 2049);
-f(134189055, 4095);
-f(134221824, 4096);
-f(134254593, 4097);
-f(268410879, 8191);
-f(268443648, 8192);
-f(268476417, 8193);
-f(536854527, 16383);
-f(536887296, 16384);
-f(536920065, 16385);
-f(1073741823, 32767);
-f(1073774592, 32768);
-f(1073807361, 32769);
-x = 65535;
-f(0, 0);
-f(65535, 1);
-f(131070, 2);
-f(196605, 3);
-f(262140, 4);
-f(327675, 5);
-f(458745, 7);
-f(524280, 8);
-f(589815, 9);
-f(983025, 15);
-f(1048560, 16);
-f(1114095, 17);
-f(2031585, 31);
-f(2097120, 32);
-f(2162655, 33);
-f(4128705, 63);
-f(4194240, 64);
-f(4259775, 65);
-f(8322945, 127);
-f(8388480, 128);
-f(8454015, 129);
-f(16711425, 255);
-f(16776960, 256);
-f(16842495, 257);
-f(33488385, 511);
-f(33553920, 512);
-f(33619455, 513);
-f(67042305, 1023);
-f(67107840, 1024);
-f(67173375, 1025);
-f(134150145, 2047);
-f(134215680, 2048);
-f(134281215, 2049);
-f(268365825, 4095);
-f(268431360, 4096);
-f(268496895, 4097);
-f(536797185, 8191);
-f(536862720, 8192);
-f(536928255, 8193);
-f(1073659905, 16383);
-f(1073725440, 16384);
-f(1073790975, 16385);
-f(2147385345, 32767);
-f(2147450880, 32768);
-f(2147516415, 32769);
-f(4294836225, 65535);
-x = 65536;
-f(0, 0);
-f(65536, 1);
-f(131072, 2);
-f(196608, 3);
-f(262144, 4);
-f(327680, 5);
-f(458752, 7);
-f(524288, 8);
-f(589824, 9);
-f(983040, 15);
-f(1048576, 16);
-f(1114112, 17);
-f(2031616, 31);
-f(2097152, 32);
-f(2162688, 33);
-f(4128768, 63);
-f(4194304, 64);
-f(4259840, 65);
-f(8323072, 127);
-f(8388608, 128);
-f(8454144, 129);
-f(16711680, 255);
-f(16777216, 256);
-f(16842752, 257);
-f(33488896, 511);
-f(33554432, 512);
-f(33619968, 513);
-f(67043328, 1023);
-f(67108864, 1024);
-f(67174400, 1025);
-f(134152192, 2047);
-f(134217728, 2048);
-f(134283264, 2049);
-f(268369920, 4095);
-f(268435456, 4096);
-f(268500992, 4097);
-f(536805376, 8191);
-f(536870912, 8192);
-f(536936448, 8193);
-f(1073676288, 16383);
-f(1073741824, 16384);
-f(1073807360, 16385);
-f(2147418112, 32767);
-f(2147483648, 32768);
-f(2147549184, 32769);
-f(4294901760, 65535);
-f(4294967296, 65536);
-x = 65537;
-f(0, 0);
-f(65537, 1);
-f(131074, 2);
-f(196611, 3);
-f(262148, 4);
-f(327685, 5);
-f(458759, 7);
-f(524296, 8);
-f(589833, 9);
-f(983055, 15);
-f(1048592, 16);
-f(1114129, 17);
-f(2031647, 31);
-f(2097184, 32);
-f(2162721, 33);
-f(4128831, 63);
-f(4194368, 64);
-f(4259905, 65);
-f(8323199, 127);
-f(8388736, 128);
-f(8454273, 129);
-f(16711935, 255);
-f(16777472, 256);
-f(16843009, 257);
-f(33489407, 511);
-f(33554944, 512);
-f(33620481, 513);
-f(67044351, 1023);
-f(67109888, 1024);
-f(67175425, 1025);
-f(134154239, 2047);
-f(134219776, 2048);
-f(134285313, 2049);
-f(268374015, 4095);
-f(268439552, 4096);
-f(268505089, 4097);
-f(536813567, 8191);
-f(536879104, 8192);
-f(536944641, 8193);
-f(1073692671, 16383);
-f(1073758208, 16384);
-f(1073823745, 16385);
-f(2147450879, 32767);
-f(2147516416, 32768);
-f(2147581953, 32769);
-f(4294967295, 65535);
-f(4295032832, 65536);
-f(4295098369, 65537);
-x = 131071;
-f(0, 0);
-f(131071, 1);
-f(262142, 2);
-f(393213, 3);
-f(524284, 4);
-f(655355, 5);
-f(917497, 7);
-f(1048568, 8);
-f(1179639, 9);
-f(1966065, 15);
-f(2097136, 16);
-f(2228207, 17);
-f(4063201, 31);
-f(4194272, 32);
-f(4325343, 33);
-f(8257473, 63);
-f(8388544, 64);
-f(8519615, 65);
-f(16646017, 127);
-f(16777088, 128);
-f(16908159, 129);
-f(33423105, 255);
-f(33554176, 256);
-f(33685247, 257);
-f(66977281, 511);
-f(67108352, 512);
-f(67239423, 513);
-f(134085633, 1023);
-f(134216704, 1024);
-f(134347775, 1025);
-f(268302337, 2047);
-f(268433408, 2048);
-f(268564479, 2049);
-f(536735745, 4095);
-f(536866816, 4096);
-f(536997887, 4097);
-f(1073602561, 8191);
-f(1073733632, 8192);
-f(1073864703, 8193);
-f(2147336193, 16383);
-f(2147467264, 16384);
-f(2147598335, 16385);
-f(4294803457, 32767);
-f(4294934528, 32768);
-f(4295065599, 32769);
-f(8589737985, 65535);
-f(8589869056, 65536);
-f(8590000127, 65537);
-f(17179607041, 131071);
-x = 131072;
-f(0, 0);
-f(131072, 1);
-f(262144, 2);
-f(393216, 3);
-f(524288, 4);
-f(655360, 5);
-f(917504, 7);
-f(1048576, 8);
-f(1179648, 9);
-f(1966080, 15);
-f(2097152, 16);
-f(2228224, 17);
-f(4063232, 31);
-f(4194304, 32);
-f(4325376, 33);
-f(8257536, 63);
-f(8388608, 64);
-f(8519680, 65);
-f(16646144, 127);
-f(16777216, 128);
-f(16908288, 129);
-f(33423360, 255);
-f(33554432, 256);
-f(33685504, 257);
-f(66977792, 511);
-f(67108864, 512);
-f(67239936, 513);
-f(134086656, 1023);
-f(134217728, 1024);
-f(134348800, 1025);
-f(268304384, 2047);
-f(268435456, 2048);
-f(268566528, 2049);
-f(536739840, 4095);
-f(536870912, 4096);
-f(537001984, 4097);
-f(1073610752, 8191);
-f(1073741824, 8192);
-f(1073872896, 8193);
-f(2147352576, 16383);
-f(2147483648, 16384);
-f(2147614720, 16385);
-f(4294836224, 32767);
-f(4294967296, 32768);
-f(4295098368, 32769);
-f(8589803520, 65535);
-f(8589934592, 65536);
-f(8590065664, 65537);
-f(17179738112, 131071);
-f(17179869184, 131072);
-x = 131073;
-f(0, 0);
-f(131073, 1);
-f(262146, 2);
-f(393219, 3);
-f(524292, 4);
-f(655365, 5);
-f(917511, 7);
-f(1048584, 8);
-f(1179657, 9);
-f(1966095, 15);
-f(2097168, 16);
-f(2228241, 17);
-f(4063263, 31);
-f(4194336, 32);
-f(4325409, 33);
-f(8257599, 63);
-f(8388672, 64);
-f(8519745, 65);
-f(16646271, 127);
-f(16777344, 128);
-f(16908417, 129);
-f(33423615, 255);
-f(33554688, 256);
-f(33685761, 257);
-f(66978303, 511);
-f(67109376, 512);
-f(67240449, 513);
-f(134087679, 1023);
-f(134218752, 1024);
-f(134349825, 1025);
-f(268306431, 2047);
-f(268437504, 2048);
-f(268568577, 2049);
-f(536743935, 4095);
-f(536875008, 4096);
-f(537006081, 4097);
-f(1073618943, 8191);
-f(1073750016, 8192);
-f(1073881089, 8193);
-f(2147368959, 16383);
-f(2147500032, 16384);
-f(2147631105, 16385);
-f(4294868991, 32767);
-f(4295000064, 32768);
-f(4295131137, 32769);
-f(8589869055, 65535);
-f(8590000128, 65536);
-f(8590131201, 65537);
-f(17179869183, 131071);
-f(17180000256, 131072);
-f(17180131329, 131073);
-x = 262143;
-f(0, 0);
-f(262143, 1);
-f(524286, 2);
-f(786429, 3);
-f(1048572, 4);
-f(1310715, 5);
-f(1835001, 7);
-f(2097144, 8);
-f(2359287, 9);
-f(3932145, 15);
-f(4194288, 16);
-f(4456431, 17);
-f(8126433, 31);
-f(8388576, 32);
-f(8650719, 33);
-f(16515009, 63);
-f(16777152, 64);
-f(17039295, 65);
-f(33292161, 127);
-f(33554304, 128);
-f(33816447, 129);
-f(66846465, 255);
-f(67108608, 256);
-f(67370751, 257);
-f(133955073, 511);
-f(134217216, 512);
-f(134479359, 513);
-f(268172289, 1023);
-f(268434432, 1024);
-f(268696575, 1025);
-f(536606721, 2047);
-f(536868864, 2048);
-f(537131007, 2049);
-f(1073475585, 4095);
-f(1073737728, 4096);
-f(1073999871, 4097);
-f(2147213313, 8191);
-f(2147475456, 8192);
-f(2147737599, 8193);
-f(4294688769, 16383);
-f(4294950912, 16384);
-f(4295213055, 16385);
-f(8589639681, 32767);
-f(8589901824, 32768);
-f(8590163967, 32769);
-f(17179541505, 65535);
-f(17179803648, 65536);
-f(17180065791, 65537);
-f(34359345153, 131071);
-f(34359607296, 131072);
-f(34359869439, 131073);
-f(68718952449, 262143);
-x = 262144;
-f(0, 0);
-f(262144, 1);
-f(524288, 2);
-f(786432, 3);
-f(1048576, 4);
-f(1310720, 5);
-f(1835008, 7);
-f(2097152, 8);
-f(2359296, 9);
-f(3932160, 15);
-f(4194304, 16);
-f(4456448, 17);
-f(8126464, 31);
-f(8388608, 32);
-f(8650752, 33);
-f(16515072, 63);
-f(16777216, 64);
-f(17039360, 65);
-f(33292288, 127);
-f(33554432, 128);
-f(33816576, 129);
-f(66846720, 255);
-f(67108864, 256);
-f(67371008, 257);
-f(133955584, 511);
-f(134217728, 512);
-f(134479872, 513);
-f(268173312, 1023);
-f(268435456, 1024);
-f(268697600, 1025);
-f(536608768, 2047);
-f(536870912, 2048);
-f(537133056, 2049);
-f(1073479680, 4095);
-f(1073741824, 4096);
-f(1074003968, 4097);
-f(2147221504, 8191);
-f(2147483648, 8192);
-f(2147745792, 8193);
-f(4294705152, 16383);
-f(4294967296, 16384);
-f(4295229440, 16385);
-f(8589672448, 32767);
-f(8589934592, 32768);
-f(8590196736, 32769);
-f(17179607040, 65535);
-f(17179869184, 65536);
-f(17180131328, 65537);
-f(34359476224, 131071);
-f(34359738368, 131072);
-f(34360000512, 131073);
-f(68719214592, 262143);
-f(68719476736, 262144);
-x = 262145;
-f(0, 0);
-f(262145, 1);
-f(524290, 2);
-f(786435, 3);
-f(1048580, 4);
-f(1310725, 5);
-f(1835015, 7);
-f(2097160, 8);
-f(2359305, 9);
-f(3932175, 15);
-f(4194320, 16);
-f(4456465, 17);
-f(8126495, 31);
-f(8388640, 32);
-f(8650785, 33);
-f(16515135, 63);
-f(16777280, 64);
-f(17039425, 65);
-f(33292415, 127);
-f(33554560, 128);
-f(33816705, 129);
-f(66846975, 255);
-f(67109120, 256);
-f(67371265, 257);
-f(133956095, 511);
-f(134218240, 512);
-f(134480385, 513);
-f(268174335, 1023);
-f(268436480, 1024);
-f(268698625, 1025);
-f(536610815, 2047);
-f(536872960, 2048);
-f(537135105, 2049);
-f(1073483775, 4095);
-f(1073745920, 4096);
-f(1074008065, 4097);
-f(2147229695, 8191);
-f(2147491840, 8192);
-f(2147753985, 8193);
-f(4294721535, 16383);
-f(4294983680, 16384);
-f(4295245825, 16385);
-f(8589705215, 32767);
-f(8589967360, 32768);
-f(8590229505, 32769);
-f(17179672575, 65535);
-f(17179934720, 65536);
-f(17180196865, 65537);
-f(34359607295, 131071);
-f(34359869440, 131072);
-f(34360131585, 131073);
-f(68719476735, 262143);
-f(68719738880, 262144);
-f(68720001025, 262145);
-x = 524287;
-f(0, 0);
-f(524287, 1);
-f(1048574, 2);
-f(1572861, 3);
-f(2097148, 4);
-f(2621435, 5);
-f(3670009, 7);
-f(4194296, 8);
-f(4718583, 9);
-f(7864305, 15);
-f(8388592, 16);
-f(8912879, 17);
-f(16252897, 31);
-f(16777184, 32);
-f(17301471, 33);
-f(33030081, 63);
-f(33554368, 64);
-f(34078655, 65);
-f(66584449, 127);
-f(67108736, 128);
-f(67633023, 129);
-f(133693185, 255);
-f(134217472, 256);
-f(134741759, 257);
-f(267910657, 511);
-f(268434944, 512);
-f(268959231, 513);
-f(536345601, 1023);
-f(536869888, 1024);
-f(537394175, 1025);
-f(1073215489, 2047);
-f(1073739776, 2048);
-f(1074264063, 2049);
-f(2146955265, 4095);
-f(2147479552, 4096);
-f(2148003839, 4097);
-f(4294434817, 8191);
-f(4294959104, 8192);
-f(4295483391, 8193);
-f(8589393921, 16383);
-f(8589918208, 16384);
-f(8590442495, 16385);
-f(17179312129, 32767);
-f(17179836416, 32768);
-f(17180360703, 32769);
-f(34359148545, 65535);
-f(34359672832, 65536);
-f(34360197119, 65537);
-f(68718821377, 131071);
-f(68719345664, 131072);
-f(68719869951, 131073);
-f(137438167041, 262143);
-f(137438691328, 262144);
-f(137439215615, 262145);
-f(274876858369, 524287);
-x = 524288;
-f(0, 0);
-f(524288, 1);
-f(1048576, 2);
-f(1572864, 3);
-f(2097152, 4);
-f(2621440, 5);
-f(3670016, 7);
-f(4194304, 8);
-f(4718592, 9);
-f(7864320, 15);
-f(8388608, 16);
-f(8912896, 17);
-f(16252928, 31);
-f(16777216, 32);
-f(17301504, 33);
-f(33030144, 63);
-f(33554432, 64);
-f(34078720, 65);
-f(66584576, 127);
-f(67108864, 128);
-f(67633152, 129);
-f(133693440, 255);
-f(134217728, 256);
-f(134742016, 257);
-f(267911168, 511);
-f(268435456, 512);
-f(268959744, 513);
-f(536346624, 1023);
-f(536870912, 1024);
-f(537395200, 1025);
-f(1073217536, 2047);
-f(1073741824, 2048);
-f(1074266112, 2049);
-f(2146959360, 4095);
-f(2147483648, 4096);
-f(2148007936, 4097);
-f(4294443008, 8191);
-f(4294967296, 8192);
-f(4295491584, 8193);
-f(8589410304, 16383);
-f(8589934592, 16384);
-f(8590458880, 16385);
-f(17179344896, 32767);
-f(17179869184, 32768);
-f(17180393472, 32769);
-f(34359214080, 65535);
-f(34359738368, 65536);
-f(34360262656, 65537);
-f(68718952448, 131071);
-f(68719476736, 131072);
-f(68720001024, 131073);
-f(137438429184, 262143);
-f(137438953472, 262144);
-f(137439477760, 262145);
-f(274877382656, 524287);
-f(274877906944, 524288);
-x = 524289;
-f(0, 0);
-f(524289, 1);
-f(1048578, 2);
-f(1572867, 3);
-f(2097156, 4);
-f(2621445, 5);
-f(3670023, 7);
-f(4194312, 8);
-f(4718601, 9);
-f(7864335, 15);
-f(8388624, 16);
-f(8912913, 17);
-f(16252959, 31);
-f(16777248, 32);
-f(17301537, 33);
-f(33030207, 63);
-f(33554496, 64);
-f(34078785, 65);
-f(66584703, 127);
-f(67108992, 128);
-f(67633281, 129);
-f(133693695, 255);
-f(134217984, 256);
-f(134742273, 257);
-f(267911679, 511);
-f(268435968, 512);
-f(268960257, 513);
-f(536347647, 1023);
-f(536871936, 1024);
-f(537396225, 1025);
-f(1073219583, 2047);
-f(1073743872, 2048);
-f(1074268161, 2049);
-f(2146963455, 4095);
-f(2147487744, 4096);
-f(2148012033, 4097);
-f(4294451199, 8191);
-f(4294975488, 8192);
-f(4295499777, 8193);
-f(8589426687, 16383);
-f(8589950976, 16384);
-f(8590475265, 16385);
-f(17179377663, 32767);
-f(17179901952, 32768);
-f(17180426241, 32769);
-f(34359279615, 65535);
-f(34359803904, 65536);
-f(34360328193, 65537);
-f(68719083519, 131071);
-f(68719607808, 131072);
-f(68720132097, 131073);
-f(137438691327, 262143);
-f(137439215616, 262144);
-f(137439739905, 262145);
-f(274877906943, 524287);
-f(274878431232, 524288);
-f(274878955521, 524289);
-x = 1048575;
-f(0, 0);
-f(1048575, 1);
-f(2097150, 2);
-f(3145725, 3);
-f(4194300, 4);
-f(5242875, 5);
-f(7340025, 7);
-f(8388600, 8);
-f(9437175, 9);
-f(15728625, 15);
-f(16777200, 16);
-f(17825775, 17);
-f(32505825, 31);
-f(33554400, 32);
-f(34602975, 33);
-f(66060225, 63);
-f(67108800, 64);
-f(68157375, 65);
-f(133169025, 127);
-f(134217600, 128);
-f(135266175, 129);
-f(267386625, 255);
-f(268435200, 256);
-f(269483775, 257);
-f(535821825, 511);
-f(536870400, 512);
-f(537918975, 513);
-f(1072692225, 1023);
-f(1073740800, 1024);
-f(1074789375, 1025);
-f(2146433025, 2047);
-f(2147481600, 2048);
-f(2148530175, 2049);
-f(4293914625, 4095);
-f(4294963200, 4096);
-f(4296011775, 4097);
-f(8588877825, 8191);
-f(8589926400, 8192);
-f(8590974975, 8193);
-f(17178804225, 16383);
-f(17179852800, 16384);
-f(17180901375, 16385);
-f(34358657025, 32767);
-f(34359705600, 32768);
-f(34360754175, 32769);
-f(68718362625, 65535);
-f(68719411200, 65536);
-f(68720459775, 65537);
-f(137437773825, 131071);
-f(137438822400, 131072);
-f(137439870975, 131073);
-f(274876596225, 262143);
-f(274877644800, 262144);
-f(274878693375, 262145);
-f(549754241025, 524287);
-f(549755289600, 524288);
-f(549756338175, 524289);
-f(1099509530625, 1048575);
-x = 1048576;
-f(0, 0);
-f(1048576, 1);
-f(2097152, 2);
-f(3145728, 3);
-f(4194304, 4);
-f(5242880, 5);
-f(7340032, 7);
-f(8388608, 8);
-f(9437184, 9);
-f(15728640, 15);
-f(16777216, 16);
-f(17825792, 17);
-f(32505856, 31);
-f(33554432, 32);
-f(34603008, 33);
-f(66060288, 63);
-f(67108864, 64);
-f(68157440, 65);
-f(133169152, 127);
-f(134217728, 128);
-f(135266304, 129);
-f(267386880, 255);
-f(268435456, 256);
-f(269484032, 257);
-f(535822336, 511);
-f(536870912, 512);
-f(537919488, 513);
-f(1072693248, 1023);
-f(1073741824, 1024);
-f(1074790400, 1025);
-f(2146435072, 2047);
-f(2147483648, 2048);
-f(2148532224, 2049);
-f(4293918720, 4095);
-f(4294967296, 4096);
-f(4296015872, 4097);
-f(8588886016, 8191);
-f(8589934592, 8192);
-f(8590983168, 8193);
-f(17178820608, 16383);
-f(17179869184, 16384);
-f(17180917760, 16385);
-f(34358689792, 32767);
-f(34359738368, 32768);
-f(34360786944, 32769);
-f(68718428160, 65535);
-f(68719476736, 65536);
-f(68720525312, 65537);
-f(137437904896, 131071);
-f(137438953472, 131072);
-f(137440002048, 131073);
-f(274876858368, 262143);
-f(274877906944, 262144);
-f(274878955520, 262145);
-f(549754765312, 524287);
-f(549755813888, 524288);
-f(549756862464, 524289);
-f(1099510579200, 1048575);
-f(1099511627776, 1048576);
-x = 1048577;
-f(0, 0);
-f(1048577, 1);
-f(2097154, 2);
-f(3145731, 3);
-f(4194308, 4);
-f(5242885, 5);
-f(7340039, 7);
-f(8388616, 8);
-f(9437193, 9);
-f(15728655, 15);
-f(16777232, 16);
-f(17825809, 17);
-f(32505887, 31);
-f(33554464, 32);
-f(34603041, 33);
-f(66060351, 63);
-f(67108928, 64);
-f(68157505, 65);
-f(133169279, 127);
-f(134217856, 128);
-f(135266433, 129);
-f(267387135, 255);
-f(268435712, 256);
-f(269484289, 257);
-f(535822847, 511);
-f(536871424, 512);
-f(537920001, 513);
-f(1072694271, 1023);
-f(1073742848, 1024);
-f(1074791425, 1025);
-f(2146437119, 2047);
-f(2147485696, 2048);
-f(2148534273, 2049);
-f(4293922815, 4095);
-f(4294971392, 4096);
-f(4296019969, 4097);
-f(8588894207, 8191);
-f(8589942784, 8192);
-f(8590991361, 8193);
-f(17178836991, 16383);
-f(17179885568, 16384);
-f(17180934145, 16385);
-f(34358722559, 32767);
-f(34359771136, 32768);
-f(34360819713, 32769);
-f(68718493695, 65535);
-f(68719542272, 65536);
-f(68720590849, 65537);
-f(137438035967, 131071);
-f(137439084544, 131072);
-f(137440133121, 131073);
-f(274877120511, 262143);
-f(274878169088, 262144);
-f(274879217665, 262145);
-f(549755289599, 524287);
-f(549756338176, 524288);
-f(549757386753, 524289);
-f(1099511627775, 1048575);
-f(1099512676352, 1048576);
-f(1099513724929, 1048577);
-x = 2097151;
-f(0, 0);
-f(2097151, 1);
-f(4194302, 2);
-f(6291453, 3);
-f(8388604, 4);
-f(10485755, 5);
-f(14680057, 7);
-f(16777208, 8);
-f(18874359, 9);
-f(31457265, 15);
-f(33554416, 16);
-f(35651567, 17);
-f(65011681, 31);
-f(67108832, 32);
-f(69205983, 33);
-f(132120513, 63);
-f(134217664, 64);
-f(136314815, 65);
-f(266338177, 127);
-f(268435328, 128);
-f(270532479, 129);
-f(534773505, 255);
-f(536870656, 256);
-f(538967807, 257);
-f(1071644161, 511);
-f(1073741312, 512);
-f(1075838463, 513);
-f(2145385473, 1023);
-f(2147482624, 1024);
-f(2149579775, 1025);
-f(4292868097, 2047);
-f(4294965248, 2048);
-f(4297062399, 2049);
-f(8587833345, 4095);
-f(8589930496, 4096);
-f(8592027647, 4097);
-f(17177763841, 8191);
-f(17179860992, 8192);
-f(17181958143, 8193);
-f(34357624833, 16383);
-f(34359721984, 16384);
-f(34361819135, 16385);
-f(68717346817, 32767);
-f(68719443968, 32768);
-f(68721541119, 32769);
-f(137436790785, 65535);
-f(137438887936, 65536);
-f(137440985087, 65537);
-f(274875678721, 131071);
-f(274877775872, 131072);
-f(274879873023, 131073);
-f(549753454593, 262143);
-f(549755551744, 262144);
-f(549757648895, 262145);
-f(1099509006337, 524287);
-f(1099511103488, 524288);
-f(1099513200639, 524289);
-f(2199020109825, 1048575);
-f(2199022206976, 1048576);
-f(2199024304127, 1048577);
-f(4398042316801, 2097151);
-x = 2097152;
-f(0, 0);
-f(2097152, 1);
-f(4194304, 2);
-f(6291456, 3);
-f(8388608, 4);
-f(10485760, 5);
-f(14680064, 7);
-f(16777216, 8);
-f(18874368, 9);
-f(31457280, 15);
-f(33554432, 16);
-f(35651584, 17);
-f(65011712, 31);
-f(67108864, 32);
-f(69206016, 33);
-f(132120576, 63);
-f(134217728, 64);
-f(136314880, 65);
-f(266338304, 127);
-f(268435456, 128);
-f(270532608, 129);
-f(534773760, 255);
-f(536870912, 256);
-f(538968064, 257);
-f(1071644672, 511);
-f(1073741824, 512);
-f(1075838976, 513);
-f(2145386496, 1023);
-f(2147483648, 1024);
-f(2149580800, 1025);
-f(4292870144, 2047);
-f(4294967296, 2048);
-f(4297064448, 2049);
-f(8587837440, 4095);
-f(8589934592, 4096);
-f(8592031744, 4097);
-f(17177772032, 8191);
-f(17179869184, 8192);
-f(17181966336, 8193);
-f(34357641216, 16383);
-f(34359738368, 16384);
-f(34361835520, 16385);
-f(68717379584, 32767);
-f(68719476736, 32768);
-f(68721573888, 32769);
-f(137436856320, 65535);
-f(137438953472, 65536);
-f(137441050624, 65537);
-f(274875809792, 131071);
-f(274877906944, 131072);
-f(274880004096, 131073);
-f(549753716736, 262143);
-f(549755813888, 262144);
-f(549757911040, 262145);
-f(1099509530624, 524287);
-f(1099511627776, 524288);
-f(1099513724928, 524289);
-f(2199021158400, 1048575);
-f(2199023255552, 1048576);
-f(2199025352704, 1048577);
-f(4398044413952, 2097151);
-f(4398046511104, 2097152);
-x = 2097153;
-f(0, 0);
-f(2097153, 1);
-f(4194306, 2);
-f(6291459, 3);
-f(8388612, 4);
-f(10485765, 5);
-f(14680071, 7);
-f(16777224, 8);
-f(18874377, 9);
-f(31457295, 15);
-f(33554448, 16);
-f(35651601, 17);
-f(65011743, 31);
-f(67108896, 32);
-f(69206049, 33);
-f(132120639, 63);
-f(134217792, 64);
-f(136314945, 65);
-f(266338431, 127);
-f(268435584, 128);
-f(270532737, 129);
-f(534774015, 255);
-f(536871168, 256);
-f(538968321, 257);
-f(1071645183, 511);
-f(1073742336, 512);
-f(1075839489, 513);
-f(2145387519, 1023);
-f(2147484672, 1024);
-f(2149581825, 1025);
-f(4292872191, 2047);
-f(4294969344, 2048);
-f(4297066497, 2049);
-f(8587841535, 4095);
-f(8589938688, 4096);
-f(8592035841, 4097);
-f(17177780223, 8191);
-f(17179877376, 8192);
-f(17181974529, 8193);
-f(34357657599, 16383);
-f(34359754752, 16384);
-f(34361851905, 16385);
-f(68717412351, 32767);
-f(68719509504, 32768);
-f(68721606657, 32769);
-f(137436921855, 65535);
-f(137439019008, 65536);
-f(137441116161, 65537);
-f(274875940863, 131071);
-f(274878038016, 131072);
-f(274880135169, 131073);
-f(549753978879, 262143);
-f(549756076032, 262144);
-f(549758173185, 262145);
-f(1099510054911, 524287);
-f(1099512152064, 524288);
-f(1099514249217, 524289);
-f(2199022206975, 1048575);
-f(2199024304128, 1048576);
-f(2199026401281, 1048577);
-f(4398046511103, 2097151);
-f(4398048608256, 2097152);
-f(4398050705409, 2097153);
-x = 4194303;
-f(0, 0);
-f(4194303, 1);
-f(8388606, 2);
-f(12582909, 3);
-f(16777212, 4);
-f(20971515, 5);
-f(29360121, 7);
-f(33554424, 8);
-f(37748727, 9);
-f(62914545, 15);
-f(67108848, 16);
-f(71303151, 17);
-f(130023393, 31);
-f(134217696, 32);
-f(138411999, 33);
-f(264241089, 63);
-f(268435392, 64);
-f(272629695, 65);
-f(532676481, 127);
-f(536870784, 128);
-f(541065087, 129);
-f(1069547265, 255);
-f(1073741568, 256);
-f(1077935871, 257);
-f(2143288833, 511);
-f(2147483136, 512);
-f(2151677439, 513);
-f(4290771969, 1023);
-f(4294966272, 1024);
-f(4299160575, 1025);
-f(8585738241, 2047);
-f(8589932544, 2048);
-f(8594126847, 2049);
-f(17175670785, 4095);
-f(17179865088, 4096);
-f(17184059391, 4097);
-f(34355535873, 8191);
-f(34359730176, 8192);
-f(34363924479, 8193);
-f(68715266049, 16383);
-f(68719460352, 16384);
-f(68723654655, 16385);
-f(137434726401, 32767);
-f(137438920704, 32768);
-f(137443115007, 32769);
-f(274873647105, 65535);
-f(274877841408, 65536);
-f(274882035711, 65537);
-f(549751488513, 131071);
-f(549755682816, 131072);
-f(549759877119, 131073);
-f(1099507171329, 262143);
-f(1099511365632, 262144);
-f(1099515559935, 262145);
-f(2199018536961, 524287);
-f(2199022731264, 524288);
-f(2199026925567, 524289);
-f(4398041268225, 1048575);
-f(4398045462528, 1048576);
-f(4398049656831, 1048577);
-f(8796086730753, 2097151);
-f(8796090925056, 2097152);
-f(8796095119359, 2097153);
-f(17592177655809, 4194303);
-x = 4194304;
-f(0, 0);
-f(4194304, 1);
-f(8388608, 2);
-f(12582912, 3);
-f(16777216, 4);
-f(20971520, 5);
-f(29360128, 7);
-f(33554432, 8);
-f(37748736, 9);
-f(62914560, 15);
-f(67108864, 16);
-f(71303168, 17);
-f(130023424, 31);
-f(134217728, 32);
-f(138412032, 33);
-f(264241152, 63);
-f(268435456, 64);
-f(272629760, 65);
-f(532676608, 127);
-f(536870912, 128);
-f(541065216, 129);
-f(1069547520, 255);
-f(1073741824, 256);
-f(1077936128, 257);
-f(2143289344, 511);
-f(2147483648, 512);
-f(2151677952, 513);
-f(4290772992, 1023);
-f(4294967296, 1024);
-f(4299161600, 1025);
-f(8585740288, 2047);
-f(8589934592, 2048);
-f(8594128896, 2049);
-f(17175674880, 4095);
-f(17179869184, 4096);
-f(17184063488, 4097);
-f(34355544064, 8191);
-f(34359738368, 8192);
-f(34363932672, 8193);
-f(68715282432, 16383);
-f(68719476736, 16384);
-f(68723671040, 16385);
-f(137434759168, 32767);
-f(137438953472, 32768);
-f(137443147776, 32769);
-f(274873712640, 65535);
-f(274877906944, 65536);
-f(274882101248, 65537);
-f(549751619584, 131071);
-f(549755813888, 131072);
-f(549760008192, 131073);
-f(1099507433472, 262143);
-f(1099511627776, 262144);
-f(1099515822080, 262145);
-f(2199019061248, 524287);
-f(2199023255552, 524288);
-f(2199027449856, 524289);
-f(4398042316800, 1048575);
-f(4398046511104, 1048576);
-f(4398050705408, 1048577);
-f(8796088827904, 2097151);
-f(8796093022208, 2097152);
-f(8796097216512, 2097153);
-f(17592181850112, 4194303);
-f(17592186044416, 4194304);
-x = 4194305;
-f(0, 0);
-f(4194305, 1);
-f(8388610, 2);
-f(12582915, 3);
-f(16777220, 4);
-f(20971525, 5);
-f(29360135, 7);
-f(33554440, 8);
-f(37748745, 9);
-f(62914575, 15);
-f(67108880, 16);
-f(71303185, 17);
-f(130023455, 31);
-f(134217760, 32);
-f(138412065, 33);
-f(264241215, 63);
-f(268435520, 64);
-f(272629825, 65);
-f(532676735, 127);
-f(536871040, 128);
-f(541065345, 129);
-f(1069547775, 255);
-f(1073742080, 256);
-f(1077936385, 257);
-f(2143289855, 511);
-f(2147484160, 512);
-f(2151678465, 513);
-f(4290774015, 1023);
-f(4294968320, 1024);
-f(4299162625, 1025);
-f(8585742335, 2047);
-f(8589936640, 2048);
-f(8594130945, 2049);
-f(17175678975, 4095);
-f(17179873280, 4096);
-f(17184067585, 4097);
-f(34355552255, 8191);
-f(34359746560, 8192);
-f(34363940865, 8193);
-f(68715298815, 16383);
-f(68719493120, 16384);
-f(68723687425, 16385);
-f(137434791935, 32767);
-f(137438986240, 32768);
-f(137443180545, 32769);
-f(274873778175, 65535);
-f(274877972480, 65536);
-f(274882166785, 65537);
-f(549751750655, 131071);
-f(549755944960, 131072);
-f(549760139265, 131073);
-f(1099507695615, 262143);
-f(1099511889920, 262144);
-f(1099516084225, 262145);
-f(2199019585535, 524287);
-f(2199023779840, 524288);
-f(2199027974145, 524289);
-f(4398043365375, 1048575);
-f(4398047559680, 1048576);
-f(4398051753985, 1048577);
-f(8796090925055, 2097151);
-f(8796095119360, 2097152);
-f(8796099313665, 2097153);
-f(17592186044415, 4194303);
-f(17592190238720, 4194304);
-f(17592194433025, 4194305);
-x = 8388607;
-f(0, 0);
-f(8388607, 1);
-f(16777214, 2);
-f(25165821, 3);
-f(33554428, 4);
-f(41943035, 5);
-f(58720249, 7);
-f(67108856, 8);
-f(75497463, 9);
-f(125829105, 15);
-f(134217712, 16);
-f(142606319, 17);
-f(260046817, 31);
-f(268435424, 32);
-f(276824031, 33);
-f(528482241, 63);
-f(536870848, 64);
-f(545259455, 65);
-f(1065353089, 127);
-f(1073741696, 128);
-f(1082130303, 129);
-f(2139094785, 255);
-f(2147483392, 256);
-f(2155871999, 257);
-f(4286578177, 511);
-f(4294966784, 512);
-f(4303355391, 513);
-f(8581544961, 1023);
-f(8589933568, 1024);
-f(8598322175, 1025);
-f(17171478529, 2047);
-f(17179867136, 2048);
-f(17188255743, 2049);
-f(34351345665, 4095);
-f(34359734272, 4096);
-f(34368122879, 4097);
-f(68711079937, 8191);
-f(68719468544, 8192);
-f(68727857151, 8193);
-f(137430548481, 16383);
-f(137438937088, 16384);
-f(137447325695, 16385);
-f(274869485569, 32767);
-f(274877874176, 32768);
-f(274886262783, 32769);
-f(549747359745, 65535);
-f(549755748352, 65536);
-f(549764136959, 65537);
-f(1099503108097, 131071);
-f(1099511496704, 131072);
-f(1099519885311, 131073);
-f(2199014604801, 262143);
-f(2199022993408, 262144);
-f(2199031382015, 262145);
-f(4398037598209, 524287);
-f(4398045986816, 524288);
-f(4398054375423, 524289);
-f(8796083585025, 1048575);
-f(8796091973632, 1048576);
-f(8796100362239, 1048577);
-f(17592175558657, 2097151);
-f(17592183947264, 2097152);
-f(17592192335871, 2097153);
-f(35184359505921, 4194303);
-f(35184367894528, 4194304);
-f(35184376283135, 4194305);
-f(70368727400449, 8388607);
-x = 8388608;
-f(0, 0);
-f(8388608, 1);
-f(16777216, 2);
-f(25165824, 3);
-f(33554432, 4);
-f(41943040, 5);
-f(58720256, 7);
-f(67108864, 8);
-f(75497472, 9);
-f(125829120, 15);
-f(134217728, 16);
-f(142606336, 17);
-f(260046848, 31);
-f(268435456, 32);
-f(276824064, 33);
-f(528482304, 63);
-f(536870912, 64);
-f(545259520, 65);
-f(1065353216, 127);
-f(1073741824, 128);
-f(1082130432, 129);
-f(2139095040, 255);
-f(2147483648, 256);
-f(2155872256, 257);
-f(4286578688, 511);
-f(4294967296, 512);
-f(4303355904, 513);
-f(8581545984, 1023);
-f(8589934592, 1024);
-f(8598323200, 1025);
-f(17171480576, 2047);
-f(17179869184, 2048);
-f(17188257792, 2049);
-f(34351349760, 4095);
-f(34359738368, 4096);
-f(34368126976, 4097);
-f(68711088128, 8191);
-f(68719476736, 8192);
-f(68727865344, 8193);
-f(137430564864, 16383);
-f(137438953472, 16384);
-f(137447342080, 16385);
-f(274869518336, 32767);
-f(274877906944, 32768);
-f(274886295552, 32769);
-f(549747425280, 65535);
-f(549755813888, 65536);
-f(549764202496, 65537);
-f(1099503239168, 131071);
-f(1099511627776, 131072);
-f(1099520016384, 131073);
-f(2199014866944, 262143);
-f(2199023255552, 262144);
-f(2199031644160, 262145);
-f(4398038122496, 524287);
-f(4398046511104, 524288);
-f(4398054899712, 524289);
-f(8796084633600, 1048575);
-f(8796093022208, 1048576);
-f(8796101410816, 1048577);
-f(17592177655808, 2097151);
-f(17592186044416, 2097152);
-f(17592194433024, 2097153);
-f(35184363700224, 4194303);
-f(35184372088832, 4194304);
-f(35184380477440, 4194305);
-f(70368735789056, 8388607);
-f(70368744177664, 8388608);
-x = 8388609;
-f(0, 0);
-f(8388609, 1);
-f(16777218, 2);
-f(25165827, 3);
-f(33554436, 4);
-f(41943045, 5);
-f(58720263, 7);
-f(67108872, 8);
-f(75497481, 9);
-f(125829135, 15);
-f(134217744, 16);
-f(142606353, 17);
-f(260046879, 31);
-f(268435488, 32);
-f(276824097, 33);
-f(528482367, 63);
-f(536870976, 64);
-f(545259585, 65);
-f(1065353343, 127);
-f(1073741952, 128);
-f(1082130561, 129);
-f(2139095295, 255);
-f(2147483904, 256);
-f(2155872513, 257);
-f(4286579199, 511);
-f(4294967808, 512);
-f(4303356417, 513);
-f(8581547007, 1023);
-f(8589935616, 1024);
-f(8598324225, 1025);
-f(17171482623, 2047);
-f(17179871232, 2048);
-f(17188259841, 2049);
-f(34351353855, 4095);
-f(34359742464, 4096);
-f(34368131073, 4097);
-f(68711096319, 8191);
-f(68719484928, 8192);
-f(68727873537, 8193);
-f(137430581247, 16383);
-f(137438969856, 16384);
-f(137447358465, 16385);
-f(274869551103, 32767);
-f(274877939712, 32768);
-f(274886328321, 32769);
-f(549747490815, 65535);
-f(549755879424, 65536);
-f(549764268033, 65537);
-f(1099503370239, 131071);
-f(1099511758848, 131072);
-f(1099520147457, 131073);
-f(2199015129087, 262143);
-f(2199023517696, 262144);
-f(2199031906305, 262145);
-f(4398038646783, 524287);
-f(4398047035392, 524288);
-f(4398055424001, 524289);
-f(8796085682175, 1048575);
-f(8796094070784, 1048576);
-f(8796102459393, 1048577);
-f(17592179752959, 2097151);
-f(17592188141568, 2097152);
-f(17592196530177, 2097153);
-f(35184367894527, 4194303);
-f(35184376283136, 4194304);
-f(35184384671745, 4194305);
-f(70368744177663, 8388607);
-f(70368752566272, 8388608);
-f(70368760954881, 8388609);
-x = 16777215;
-f(0, 0);
-f(16777215, 1);
-f(33554430, 2);
-f(50331645, 3);
-f(67108860, 4);
-f(83886075, 5);
-f(117440505, 7);
-f(134217720, 8);
-f(150994935, 9);
-f(251658225, 15);
-f(268435440, 16);
-f(285212655, 17);
-f(520093665, 31);
-f(536870880, 32);
-f(553648095, 33);
-f(1056964545, 63);
-f(1073741760, 64);
-f(1090518975, 65);
-f(2130706305, 127);
-f(2147483520, 128);
-f(2164260735, 129);
-f(4278189825, 255);
-f(4294967040, 256);
-f(4311744255, 257);
-f(8573156865, 511);
-f(8589934080, 512);
-f(8606711295, 513);
-f(17163090945, 1023);
-f(17179868160, 1024);
-f(17196645375, 1025);
-f(34342959105, 2047);
-f(34359736320, 2048);
-f(34376513535, 2049);
-f(68702695425, 4095);
-f(68719472640, 4096);
-f(68736249855, 4097);
-f(137422168065, 8191);
-f(137438945280, 8192);
-f(137455722495, 8193);
-f(274861113345, 16383);
-f(274877890560, 16384);
-f(274894667775, 16385);
-f(549739003905, 32767);
-f(549755781120, 32768);
-f(549772558335, 32769);
-f(1099494785025, 65535);
-f(1099511562240, 65536);
-f(1099528339455, 65537);
-f(2199006347265, 131071);
-f(2199023124480, 131072);
-f(2199039901695, 131073);
-f(4398029471745, 262143);
-f(4398046248960, 262144);
-f(4398063026175, 262145);
-f(8796075720705, 524287);
-f(8796092497920, 524288);
-f(8796109275135, 524289);
-f(17592168218625, 1048575);
-f(17592184995840, 1048576);
-f(17592201773055, 1048577);
-f(35184353214465, 2097151);
-f(35184369991680, 2097152);
-f(35184386768895, 2097153);
-f(70368723206145, 4194303);
-f(70368739983360, 4194304);
-f(70368756760575, 4194305);
-f(140737463189505, 8388607);
-f(140737479966720, 8388608);
-f(140737496743935, 8388609);
-f(281474943156225, 16777215);
-x = 16777216;
-f(0, 0);
-f(16777216, 1);
-f(33554432, 2);
-f(50331648, 3);
-f(67108864, 4);
-f(83886080, 5);
-f(117440512, 7);
-f(134217728, 8);
-f(150994944, 9);
-f(251658240, 15);
-f(268435456, 16);
-f(285212672, 17);
-f(520093696, 31);
-f(536870912, 32);
-f(553648128, 33);
-f(1056964608, 63);
-f(1073741824, 64);
-f(1090519040, 65);
-f(2130706432, 127);
-f(2147483648, 128);
-f(2164260864, 129);
-f(4278190080, 255);
-f(4294967296, 256);
-f(4311744512, 257);
-f(8573157376, 511);
-f(8589934592, 512);
-f(8606711808, 513);
-f(17163091968, 1023);
-f(17179869184, 1024);
-f(17196646400, 1025);
-f(34342961152, 2047);
-f(34359738368, 2048);
-f(34376515584, 2049);
-f(68702699520, 4095);
-f(68719476736, 4096);
-f(68736253952, 4097);
-f(137422176256, 8191);
-f(137438953472, 8192);
-f(137455730688, 8193);
-f(274861129728, 16383);
-f(274877906944, 16384);
-f(274894684160, 16385);
-f(549739036672, 32767);
-f(549755813888, 32768);
-f(549772591104, 32769);
-f(1099494850560, 65535);
-f(1099511627776, 65536);
-f(1099528404992, 65537);
-f(2199006478336, 131071);
-f(2199023255552, 131072);
-f(2199040032768, 131073);
-f(4398029733888, 262143);
-f(4398046511104, 262144);
-f(4398063288320, 262145);
-f(8796076244992, 524287);
-f(8796093022208, 524288);
-f(8796109799424, 524289);
-f(17592169267200, 1048575);
-f(17592186044416, 1048576);
-f(17592202821632, 1048577);
-f(35184355311616, 2097151);
-f(35184372088832, 2097152);
-f(35184388866048, 2097153);
-f(70368727400448, 4194303);
-f(70368744177664, 4194304);
-f(70368760954880, 4194305);
-f(140737471578112, 8388607);
-f(140737488355328, 8388608);
-f(140737505132544, 8388609);
-f(281474959933440, 16777215);
-f(281474976710656, 16777216);
-x = 16777217;
-f(0, 0);
-f(16777217, 1);
-f(33554434, 2);
-f(50331651, 3);
-f(67108868, 4);
-f(83886085, 5);
-f(117440519, 7);
-f(134217736, 8);
-f(150994953, 9);
-f(251658255, 15);
-f(268435472, 16);
-f(285212689, 17);
-f(520093727, 31);
-f(536870944, 32);
-f(553648161, 33);
-f(1056964671, 63);
-f(1073741888, 64);
-f(1090519105, 65);
-f(2130706559, 127);
-f(2147483776, 128);
-f(2164260993, 129);
-f(4278190335, 255);
-f(4294967552, 256);
-f(4311744769, 257);
-f(8573157887, 511);
-f(8589935104, 512);
-f(8606712321, 513);
-f(17163092991, 1023);
-f(17179870208, 1024);
-f(17196647425, 1025);
-f(34342963199, 2047);
-f(34359740416, 2048);
-f(34376517633, 2049);
-f(68702703615, 4095);
-f(68719480832, 4096);
-f(68736258049, 4097);
-f(137422184447, 8191);
-f(137438961664, 8192);
-f(137455738881, 8193);
-f(274861146111, 16383);
-f(274877923328, 16384);
-f(274894700545, 16385);
-f(549739069439, 32767);
-f(549755846656, 32768);
-f(549772623873, 32769);
-f(1099494916095, 65535);
-f(1099511693312, 65536);
-f(1099528470529, 65537);
-f(2199006609407, 131071);
-f(2199023386624, 131072);
-f(2199040163841, 131073);
-f(4398029996031, 262143);
-f(4398046773248, 262144);
-f(4398063550465, 262145);
-f(8796076769279, 524287);
-f(8796093546496, 524288);
-f(8796110323713, 524289);
-f(17592170315775, 1048575);
-f(17592187092992, 1048576);
-f(17592203870209, 1048577);
-f(35184357408767, 2097151);
-f(35184374185984, 2097152);
-f(35184390963201, 2097153);
-f(70368731594751, 4194303);
-f(70368748371968, 4194304);
-f(70368765149185, 4194305);
-f(140737479966719, 8388607);
-f(140737496743936, 8388608);
-f(140737513521153, 8388609);
-f(281474976710655, 16777215);
-f(281474993487872, 16777216);
-f(281475010265089, 16777217);
-x = 33554431;
-f(0, 0);
-f(33554431, 1);
-f(67108862, 2);
-f(100663293, 3);
-f(134217724, 4);
-f(167772155, 5);
-f(234881017, 7);
-f(268435448, 8);
-f(301989879, 9);
-f(503316465, 15);
-f(536870896, 16);
-f(570425327, 17);
-f(1040187361, 31);
-f(1073741792, 32);
-f(1107296223, 33);
-f(2113929153, 63);
-f(2147483584, 64);
-f(2181038015, 65);
-f(4261412737, 127);
-f(4294967168, 128);
-f(4328521599, 129);
-f(8556379905, 255);
-f(8589934336, 256);
-f(8623488767, 257);
-f(17146314241, 511);
-f(17179868672, 512);
-f(17213423103, 513);
-f(34326182913, 1023);
-f(34359737344, 1024);
-f(34393291775, 1025);
-f(68685920257, 2047);
-f(68719474688, 2048);
-f(68753029119, 2049);
-f(137405394945, 4095);
-f(137438949376, 4096);
-f(137472503807, 4097);
-f(274844344321, 8191);
-f(274877898752, 8192);
-f(274911453183, 8193);
-f(549722243073, 16383);
-f(549755797504, 16384);
-f(549789351935, 16385);
-f(1099478040577, 32767);
-f(1099511595008, 32768);
-f(1099545149439, 32769);
-f(2198989635585, 65535);
-f(2199023190016, 65536);
-f(2199056744447, 65537);
-f(4398012825601, 131071);
-f(4398046380032, 131072);
-f(4398079934463, 131073);
-f(8796059205633, 262143);
-f(8796092760064, 262144);
-f(8796126314495, 262145);
-f(17592151965697, 524287);
-f(17592185520128, 524288);
-f(17592219074559, 524289);
-f(35184337485825, 1048575);
-f(35184371040256, 1048576);
-f(35184404594687, 1048577);
-f(70368708526081, 2097151);
-f(70368742080512, 2097152);
-f(70368775634943, 2097153);
-f(140737450606593, 4194303);
-f(140737484161024, 4194304);
-f(140737517715455, 4194305);
-f(281474934767617, 8388607);
-f(281474968322048, 8388608);
-f(281475001876479, 8388609);
-f(562949903089665, 16777215);
-f(562949936644096, 16777216);
-f(562949970198527, 16777217);
-f(1125899839733761, 33554431);
-x = 33554432;
-f(0, 0);
-f(33554432, 1);
-f(67108864, 2);
-f(100663296, 3);
-f(134217728, 4);
-f(167772160, 5);
-f(234881024, 7);
-f(268435456, 8);
-f(301989888, 9);
-f(503316480, 15);
-f(536870912, 16);
-f(570425344, 17);
-f(1040187392, 31);
-f(1073741824, 32);
-f(1107296256, 33);
-f(2113929216, 63);
-f(2147483648, 64);
-f(2181038080, 65);
-f(4261412864, 127);
-f(4294967296, 128);
-f(4328521728, 129);
-f(8556380160, 255);
-f(8589934592, 256);
-f(8623489024, 257);
-f(17146314752, 511);
-f(17179869184, 512);
-f(17213423616, 513);
-f(34326183936, 1023);
-f(34359738368, 1024);
-f(34393292800, 1025);
-f(68685922304, 2047);
-f(68719476736, 2048);
-f(68753031168, 2049);
-f(137405399040, 4095);
-f(137438953472, 4096);
-f(137472507904, 4097);
-f(274844352512, 8191);
-f(274877906944, 8192);
-f(274911461376, 8193);
-f(549722259456, 16383);
-f(549755813888, 16384);
-f(549789368320, 16385);
-f(1099478073344, 32767);
-f(1099511627776, 32768);
-f(1099545182208, 32769);
-f(2198989701120, 65535);
-f(2199023255552, 65536);
-f(2199056809984, 65537);
-f(4398012956672, 131071);
-f(4398046511104, 131072);
-f(4398080065536, 131073);
-f(8796059467776, 262143);
-f(8796093022208, 262144);
-f(8796126576640, 262145);
-f(17592152489984, 524287);
-f(17592186044416, 524288);
-f(17592219598848, 524289);
-f(35184338534400, 1048575);
-f(35184372088832, 1048576);
-f(35184405643264, 1048577);
-f(70368710623232, 2097151);
-f(70368744177664, 2097152);
-f(70368777732096, 2097153);
-f(140737454800896, 4194303);
-f(140737488355328, 4194304);
-f(140737521909760, 4194305);
-f(281474943156224, 8388607);
-f(281474976710656, 8388608);
-f(281475010265088, 8388609);
-f(562949919866880, 16777215);
-f(562949953421312, 16777216);
-f(562949986975744, 16777217);
-f(1125899873288192, 33554431);
-f(1125899906842624, 33554432);
-x = 33554433;
-f(0, 0);
-f(33554433, 1);
-f(67108866, 2);
-f(100663299, 3);
-f(134217732, 4);
-f(167772165, 5);
-f(234881031, 7);
-f(268435464, 8);
-f(301989897, 9);
-f(503316495, 15);
-f(536870928, 16);
-f(570425361, 17);
-f(1040187423, 31);
-f(1073741856, 32);
-f(1107296289, 33);
-f(2113929279, 63);
-f(2147483712, 64);
-f(2181038145, 65);
-f(4261412991, 127);
-f(4294967424, 128);
-f(4328521857, 129);
-f(8556380415, 255);
-f(8589934848, 256);
-f(8623489281, 257);
-f(17146315263, 511);
-f(17179869696, 512);
-f(17213424129, 513);
-f(34326184959, 1023);
-f(34359739392, 1024);
-f(34393293825, 1025);
-f(68685924351, 2047);
-f(68719478784, 2048);
-f(68753033217, 2049);
-f(137405403135, 4095);
-f(137438957568, 4096);
-f(137472512001, 4097);
-f(274844360703, 8191);
-f(274877915136, 8192);
-f(274911469569, 8193);
-f(549722275839, 16383);
-f(549755830272, 16384);
-f(549789384705, 16385);
-f(1099478106111, 32767);
-f(1099511660544, 32768);
-f(1099545214977, 32769);
-f(2198989766655, 65535);
-f(2199023321088, 65536);
-f(2199056875521, 65537);
-f(4398013087743, 131071);
-f(4398046642176, 131072);
-f(4398080196609, 131073);
-f(8796059729919, 262143);
-f(8796093284352, 262144);
-f(8796126838785, 262145);
-f(17592153014271, 524287);
-f(17592186568704, 524288);
-f(17592220123137, 524289);
-f(35184339582975, 1048575);
-f(35184373137408, 1048576);
-f(35184406691841, 1048577);
-f(70368712720383, 2097151);
-f(70368746274816, 2097152);
-f(70368779829249, 2097153);
-f(140737458995199, 4194303);
-f(140737492549632, 4194304);
-f(140737526104065, 4194305);
-f(281474951544831, 8388607);
-f(281474985099264, 8388608);
-f(281475018653697, 8388609);
-f(562949936644095, 16777215);
-f(562949970198528, 16777216);
-f(562950003752961, 16777217);
-f(1125899906842623, 33554431);
-f(1125899940397056, 33554432);
-f(1125899973951489, 33554433);
-x = 67108863;
-f(0, 0);
-f(67108863, 1);
-f(134217726, 2);
-f(201326589, 3);
-f(268435452, 4);
-f(335544315, 5);
-f(469762041, 7);
-f(536870904, 8);
-f(603979767, 9);
-f(1006632945, 15);
-f(1073741808, 16);
-f(1140850671, 17);
-f(2080374753, 31);
-f(2147483616, 32);
-f(2214592479, 33);
-f(4227858369, 63);
-f(4294967232, 64);
-f(4362076095, 65);
-f(8522825601, 127);
-f(8589934464, 128);
-f(8657043327, 129);
-f(17112760065, 255);
-f(17179868928, 256);
-f(17246977791, 257);
-f(34292628993, 511);
-f(34359737856, 512);
-f(34426846719, 513);
-f(68652366849, 1023);
-f(68719475712, 1024);
-f(68786584575, 1025);
-f(137371842561, 2047);
-f(137438951424, 2048);
-f(137506060287, 2049);
-f(274810793985, 4095);
-f(274877902848, 4096);
-f(274945011711, 4097);
-f(549688696833, 8191);
-f(549755805696, 8192);
-f(549822914559, 8193);
-f(1099444502529, 16383);
-f(1099511611392, 16384);
-f(1099578720255, 16385);
-f(2198956113921, 32767);
-f(2199023222784, 32768);
-f(2199090331647, 32769);
-f(4397979336705, 65535);
-f(4398046445568, 65536);
-f(4398113554431, 65537);
-f(8796025782273, 131071);
-f(8796092891136, 131072);
-f(8796159999999, 131073);
-f(17592118673409, 262143);
-f(17592185782272, 262144);
-f(17592252891135, 262145);
-f(35184304455681, 524287);
-f(35184371564544, 524288);
-f(35184438673407, 524289);
-f(70368676020225, 1048575);
-f(70368743129088, 1048576);
-f(70368810237951, 1048577);
-f(140737419149313, 2097151);
-f(140737486258176, 2097152);
-f(140737553367039, 2097153);
-f(281474905407489, 4194303);
-f(281474972516352, 4194304);
-f(281475039625215, 4194305);
-f(562949877923841, 8388607);
-f(562949945032704, 8388608);
-f(562950012141567, 8388609);
-f(1125899822956545, 16777215);
-f(1125899890065408, 16777216);
-f(1125899957174271, 16777217);
-x = 67108864;
-f(0, 0);
-f(67108864, 1);
-f(134217728, 2);
-f(201326592, 3);
-f(268435456, 4);
-f(335544320, 5);
-f(469762048, 7);
-f(536870912, 8);
-f(603979776, 9);
-f(1006632960, 15);
-f(1073741824, 16);
-f(1140850688, 17);
-f(2080374784, 31);
-f(2147483648, 32);
-f(2214592512, 33);
-f(4227858432, 63);
-f(4294967296, 64);
-f(4362076160, 65);
-f(8522825728, 127);
-f(8589934592, 128);
-f(8657043456, 129);
-f(17112760320, 255);
-f(17179869184, 256);
-f(17246978048, 257);
-f(34292629504, 511);
-f(34359738368, 512);
-f(34426847232, 513);
-f(68652367872, 1023);
-f(68719476736, 1024);
-f(68786585600, 1025);
-f(137371844608, 2047);
-f(137438953472, 2048);
-f(137506062336, 2049);
-f(274810798080, 4095);
-f(274877906944, 4096);
-f(274945015808, 4097);
-f(549688705024, 8191);
-f(549755813888, 8192);
-f(549822922752, 8193);
-f(1099444518912, 16383);
-f(1099511627776, 16384);
-f(1099578736640, 16385);
-f(2198956146688, 32767);
-f(2199023255552, 32768);
-f(2199090364416, 32769);
-f(4397979402240, 65535);
-f(4398046511104, 65536);
-f(4398113619968, 65537);
-f(8796025913344, 131071);
-f(8796093022208, 131072);
-f(8796160131072, 131073);
-f(17592118935552, 262143);
-f(17592186044416, 262144);
-f(17592253153280, 262145);
-f(35184304979968, 524287);
-f(35184372088832, 524288);
-f(35184439197696, 524289);
-f(70368677068800, 1048575);
-f(70368744177664, 1048576);
-f(70368811286528, 1048577);
-f(140737421246464, 2097151);
-f(140737488355328, 2097152);
-f(140737555464192, 2097153);
-f(281474909601792, 4194303);
-f(281474976710656, 4194304);
-f(281475043819520, 4194305);
-f(562949886312448, 8388607);
-f(562949953421312, 8388608);
-f(562950020530176, 8388609);
-f(1125899839733760, 16777215);
-f(1125899906842624, 16777216);
-f(1125899973951488, 16777217);
-x = 67108865;
-f(0, 0);
-f(67108865, 1);
-f(134217730, 2);
-f(201326595, 3);
-f(268435460, 4);
-f(335544325, 5);
-f(469762055, 7);
-f(536870920, 8);
-f(603979785, 9);
-f(1006632975, 15);
-f(1073741840, 16);
-f(1140850705, 17);
-f(2080374815, 31);
-f(2147483680, 32);
-f(2214592545, 33);
-f(4227858495, 63);
-f(4294967360, 64);
-f(4362076225, 65);
-f(8522825855, 127);
-f(8589934720, 128);
-f(8657043585, 129);
-f(17112760575, 255);
-f(17179869440, 256);
-f(17246978305, 257);
-f(34292630015, 511);
-f(34359738880, 512);
-f(34426847745, 513);
-f(68652368895, 1023);
-f(68719477760, 1024);
-f(68786586625, 1025);
-f(137371846655, 2047);
-f(137438955520, 2048);
-f(137506064385, 2049);
-f(274810802175, 4095);
-f(274877911040, 4096);
-f(274945019905, 4097);
-f(549688713215, 8191);
-f(549755822080, 8192);
-f(549822930945, 8193);
-f(1099444535295, 16383);
-f(1099511644160, 16384);
-f(1099578753025, 16385);
-f(2198956179455, 32767);
-f(2199023288320, 32768);
-f(2199090397185, 32769);
-f(4397979467775, 65535);
-f(4398046576640, 65536);
-f(4398113685505, 65537);
-f(8796026044415, 131071);
-f(8796093153280, 131072);
-f(8796160262145, 131073);
-f(17592119197695, 262143);
-f(17592186306560, 262144);
-f(17592253415425, 262145);
-f(35184305504255, 524287);
-f(35184372613120, 524288);
-f(35184439721985, 524289);
-f(70368678117375, 1048575);
-f(70368745226240, 1048576);
-f(70368812335105, 1048577);
-f(140737423343615, 2097151);
-f(140737490452480, 2097152);
-f(140737557561345, 2097153);
-f(281474913796095, 4194303);
-f(281474980904960, 4194304);
-f(281475048013825, 4194305);
-f(562949894701055, 8388607);
-f(562949961809920, 8388608);
-f(562950028918785, 8388609);
-f(1125899856510975, 16777215);
-f(1125899923619840, 16777216);
-f(1125899990728705, 16777217);
-x = 134217727;
-f(0, 0);
-f(134217727, 1);
-f(268435454, 2);
-f(402653181, 3);
-f(536870908, 4);
-f(671088635, 5);
-f(939524089, 7);
-f(1073741816, 8);
-f(1207959543, 9);
-f(2013265905, 15);
-f(2147483632, 16);
-f(2281701359, 17);
-f(4160749537, 31);
-f(4294967264, 32);
-f(4429184991, 33);
-f(8455716801, 63);
-f(8589934528, 64);
-f(8724152255, 65);
-f(17045651329, 127);
-f(17179869056, 128);
-f(17314086783, 129);
-f(34225520385, 255);
-f(34359738112, 256);
-f(34493955839, 257);
-f(68585258497, 511);
-f(68719476224, 512);
-f(68853693951, 513);
-f(137304734721, 1023);
-f(137438952448, 1024);
-f(137573170175, 1025);
-f(274743687169, 2047);
-f(274877904896, 2048);
-f(275012122623, 2049);
-f(549621592065, 4095);
-f(549755809792, 4096);
-f(549890027519, 4097);
-f(1099377401857, 8191);
-f(1099511619584, 8192);
-f(1099645837311, 8193);
-f(2198889021441, 16383);
-f(2199023239168, 16384);
-f(2199157456895, 16385);
-f(4397912260609, 32767);
-f(4398046478336, 32768);
-f(4398180696063, 32769);
-f(8795958738945, 65535);
-f(8796092956672, 65536);
-f(8796227174399, 65537);
-f(17592051695617, 131071);
-f(17592185913344, 131072);
-f(17592320131071, 131073);
-f(35184237608961, 262143);
-f(35184371826688, 262144);
-f(35184506044415, 262145);
-f(70368609435649, 524287);
-f(70368743653376, 524288);
-f(70368877871103, 524289);
-f(140737353089025, 1048575);
-f(140737487306752, 1048576);
-f(140737621524479, 1048577);
-f(281474840395777, 2097151);
-f(281474974613504, 2097152);
-f(281475108831231, 2097153);
-f(562949815009281, 4194303);
-f(562949949227008, 4194304);
-f(562950083444735, 4194305);
-f(1125899764236289, 8388607);
-f(1125899898454016, 8388608);
-f(1125900032671743, 8388609);
-x = 134217728;
-f(0, 0);
-f(134217728, 1);
-f(268435456, 2);
-f(402653184, 3);
-f(536870912, 4);
-f(671088640, 5);
-f(939524096, 7);
-f(1073741824, 8);
-f(1207959552, 9);
-f(2013265920, 15);
-f(2147483648, 16);
-f(2281701376, 17);
-f(4160749568, 31);
-f(4294967296, 32);
-f(4429185024, 33);
-f(8455716864, 63);
-f(8589934592, 64);
-f(8724152320, 65);
-f(17045651456, 127);
-f(17179869184, 128);
-f(17314086912, 129);
-f(34225520640, 255);
-f(34359738368, 256);
-f(34493956096, 257);
-f(68585259008, 511);
-f(68719476736, 512);
-f(68853694464, 513);
-f(137304735744, 1023);
-f(137438953472, 1024);
-f(137573171200, 1025);
-f(274743689216, 2047);
-f(274877906944, 2048);
-f(275012124672, 2049);
-f(549621596160, 4095);
-f(549755813888, 4096);
-f(549890031616, 4097);
-f(1099377410048, 8191);
-f(1099511627776, 8192);
-f(1099645845504, 8193);
-f(2198889037824, 16383);
-f(2199023255552, 16384);
-f(2199157473280, 16385);
-f(4397912293376, 32767);
-f(4398046511104, 32768);
-f(4398180728832, 32769);
-f(8795958804480, 65535);
-f(8796093022208, 65536);
-f(8796227239936, 65537);
-f(17592051826688, 131071);
-f(17592186044416, 131072);
-f(17592320262144, 131073);
-f(35184237871104, 262143);
-f(35184372088832, 262144);
-f(35184506306560, 262145);
-f(70368609959936, 524287);
-f(70368744177664, 524288);
-f(70368878395392, 524289);
-f(140737354137600, 1048575);
-f(140737488355328, 1048576);
-f(140737622573056, 1048577);
-f(281474842492928, 2097151);
-f(281474976710656, 2097152);
-f(281475110928384, 2097153);
-f(562949819203584, 4194303);
-f(562949953421312, 4194304);
-f(562950087639040, 4194305);
-f(1125899772624896, 8388607);
-f(1125899906842624, 8388608);
-f(1125900041060352, 8388609);
-x = 134217729;
-f(0, 0);
-f(134217729, 1);
-f(268435458, 2);
-f(402653187, 3);
-f(536870916, 4);
-f(671088645, 5);
-f(939524103, 7);
-f(1073741832, 8);
-f(1207959561, 9);
-f(2013265935, 15);
-f(2147483664, 16);
-f(2281701393, 17);
-f(4160749599, 31);
-f(4294967328, 32);
-f(4429185057, 33);
-f(8455716927, 63);
-f(8589934656, 64);
-f(8724152385, 65);
-f(17045651583, 127);
-f(17179869312, 128);
-f(17314087041, 129);
-f(34225520895, 255);
-f(34359738624, 256);
-f(34493956353, 257);
-f(68585259519, 511);
-f(68719477248, 512);
-f(68853694977, 513);
-f(137304736767, 1023);
-f(137438954496, 1024);
-f(137573172225, 1025);
-f(274743691263, 2047);
-f(274877908992, 2048);
-f(275012126721, 2049);
-f(549621600255, 4095);
-f(549755817984, 4096);
-f(549890035713, 4097);
-f(1099377418239, 8191);
-f(1099511635968, 8192);
-f(1099645853697, 8193);
-f(2198889054207, 16383);
-f(2199023271936, 16384);
-f(2199157489665, 16385);
-f(4397912326143, 32767);
-f(4398046543872, 32768);
-f(4398180761601, 32769);
-f(8795958870015, 65535);
-f(8796093087744, 65536);
-f(8796227305473, 65537);
-f(17592051957759, 131071);
-f(17592186175488, 131072);
-f(17592320393217, 131073);
-f(35184238133247, 262143);
-f(35184372350976, 262144);
-f(35184506568705, 262145);
-f(70368610484223, 524287);
-f(70368744701952, 524288);
-f(70368878919681, 524289);
-f(140737355186175, 1048575);
-f(140737489403904, 1048576);
-f(140737623621633, 1048577);
-f(281474844590079, 2097151);
-f(281474978807808, 2097152);
-f(281475113025537, 2097153);
-f(562949823397887, 4194303);
-f(562949957615616, 4194304);
-f(562950091833345, 4194305);
-f(1125899781013503, 8388607);
-f(1125899915231232, 8388608);
-f(1125900049448961, 8388609);
-x = 268435455;
-f(0, 0);
-f(268435455, 1);
-f(536870910, 2);
-f(805306365, 3);
-f(1073741820, 4);
-f(1342177275, 5);
-f(1879048185, 7);
-f(2147483640, 8);
-f(2415919095, 9);
-f(4026531825, 15);
-f(4294967280, 16);
-f(4563402735, 17);
-f(8321499105, 31);
-f(8589934560, 32);
-f(8858370015, 33);
-f(16911433665, 63);
-f(17179869120, 64);
-f(17448304575, 65);
-f(34091302785, 127);
-f(34359738240, 128);
-f(34628173695, 129);
-f(68451041025, 255);
-f(68719476480, 256);
-f(68987911935, 257);
-f(137170517505, 511);
-f(137438952960, 512);
-f(137707388415, 513);
-f(274609470465, 1023);
-f(274877905920, 1024);
-f(275146341375, 1025);
-f(549487376385, 2047);
-f(549755811840, 2048);
-f(550024247295, 2049);
-f(1099243188225, 4095);
-f(1099511623680, 4096);
-f(1099780059135, 4097);
-f(2198754811905, 8191);
-f(2199023247360, 8192);
-f(2199291682815, 8193);
-f(4397778059265, 16383);
-f(4398046494720, 16384);
-f(4398314930175, 16385);
-f(8795824553985, 32767);
-f(8796092989440, 32768);
-f(8796361424895, 32769);
-f(17591917543425, 65535);
-f(17592185978880, 65536);
-f(17592454414335, 65537);
-f(35184103522305, 131071);
-f(35184371957760, 131072);
-f(35184640393215, 131073);
-f(70368475480065, 262143);
-f(70368743915520, 262144);
-f(70369012350975, 262145);
-f(140737219395585, 524287);
-f(140737487831040, 524288);
-f(140737756266495, 524289);
-f(281474707226625, 1048575);
-f(281474975662080, 1048576);
-f(281475244097535, 1048577);
-f(562949682888705, 2097151);
-f(562949951324160, 2097152);
-f(562950219759615, 2097153);
-f(1125899634212865, 4194303);
-f(1125899902648320, 4194304);
-f(1125900171083775, 4194305);
-x = 268435456;
-f(0, 0);
-f(268435456, 1);
-f(536870912, 2);
-f(805306368, 3);
-f(1073741824, 4);
-f(1342177280, 5);
-f(1879048192, 7);
-f(2147483648, 8);
-f(2415919104, 9);
-f(4026531840, 15);
-f(4294967296, 16);
-f(4563402752, 17);
-f(8321499136, 31);
-f(8589934592, 32);
-f(8858370048, 33);
-f(16911433728, 63);
-f(17179869184, 64);
-f(17448304640, 65);
-f(34091302912, 127);
-f(34359738368, 128);
-f(34628173824, 129);
-f(68451041280, 255);
-f(68719476736, 256);
-f(68987912192, 257);
-f(137170518016, 511);
-f(137438953472, 512);
-f(137707388928, 513);
-f(274609471488, 1023);
-f(274877906944, 1024);
-f(275146342400, 1025);
-f(549487378432, 2047);
-f(549755813888, 2048);
-f(550024249344, 2049);
-f(1099243192320, 4095);
-f(1099511627776, 4096);
-f(1099780063232, 4097);
-f(2198754820096, 8191);
-f(2199023255552, 8192);
-f(2199291691008, 8193);
-f(4397778075648, 16383);
-f(4398046511104, 16384);
-f(4398314946560, 16385);
-f(8795824586752, 32767);
-f(8796093022208, 32768);
-f(8796361457664, 32769);
-f(17591917608960, 65535);
-f(17592186044416, 65536);
-f(17592454479872, 65537);
-f(35184103653376, 131071);
-f(35184372088832, 131072);
-f(35184640524288, 131073);
-f(70368475742208, 262143);
-f(70368744177664, 262144);
-f(70369012613120, 262145);
-f(140737219919872, 524287);
-f(140737488355328, 524288);
-f(140737756790784, 524289);
-f(281474708275200, 1048575);
-f(281474976710656, 1048576);
-f(281475245146112, 1048577);
-f(562949684985856, 2097151);
-f(562949953421312, 2097152);
-f(562950221856768, 2097153);
-f(1125899638407168, 4194303);
-f(1125899906842624, 4194304);
-f(1125900175278080, 4194305);
-x = 268435457;
-f(0, 0);
-f(268435457, 1);
-f(536870914, 2);
-f(805306371, 3);
-f(1073741828, 4);
-f(1342177285, 5);
-f(1879048199, 7);
-f(2147483656, 8);
-f(2415919113, 9);
-f(4026531855, 15);
-f(4294967312, 16);
-f(4563402769, 17);
-f(8321499167, 31);
-f(8589934624, 32);
-f(8858370081, 33);
-f(16911433791, 63);
-f(17179869248, 64);
-f(17448304705, 65);
-f(34091303039, 127);
-f(34359738496, 128);
-f(34628173953, 129);
-f(68451041535, 255);
-f(68719476992, 256);
-f(68987912449, 257);
-f(137170518527, 511);
-f(137438953984, 512);
-f(137707389441, 513);
-f(274609472511, 1023);
-f(274877907968, 1024);
-f(275146343425, 1025);
-f(549487380479, 2047);
-f(549755815936, 2048);
-f(550024251393, 2049);
-f(1099243196415, 4095);
-f(1099511631872, 4096);
-f(1099780067329, 4097);
-f(2198754828287, 8191);
-f(2199023263744, 8192);
-f(2199291699201, 8193);
-f(4397778092031, 16383);
-f(4398046527488, 16384);
-f(4398314962945, 16385);
-f(8795824619519, 32767);
-f(8796093054976, 32768);
-f(8796361490433, 32769);
-f(17591917674495, 65535);
-f(17592186109952, 65536);
-f(17592454545409, 65537);
-f(35184103784447, 131071);
-f(35184372219904, 131072);
-f(35184640655361, 131073);
-f(70368476004351, 262143);
-f(70368744439808, 262144);
-f(70369012875265, 262145);
-f(140737220444159, 524287);
-f(140737488879616, 524288);
-f(140737757315073, 524289);
-f(281474709323775, 1048575);
-f(281474977759232, 1048576);
-f(281475246194689, 1048577);
-f(562949687083007, 2097151);
-f(562949955518464, 2097152);
-f(562950223953921, 2097153);
-f(1125899642601471, 4194303);
-f(1125899911036928, 4194304);
-f(1125900179472385, 4194305);
-x = 536870911;
-f(0, 0);
-f(536870911, 1);
-f(1073741822, 2);
-f(1610612733, 3);
-f(2147483644, 4);
-f(2684354555, 5);
-f(3758096377, 7);
-f(4294967288, 8);
-f(4831838199, 9);
-f(8053063665, 15);
-f(8589934576, 16);
-f(9126805487, 17);
-f(16642998241, 31);
-f(17179869152, 32);
-f(17716740063, 33);
-f(33822867393, 63);
-f(34359738304, 64);
-f(34896609215, 65);
-f(68182605697, 127);
-f(68719476608, 128);
-f(69256347519, 129);
-f(136902082305, 255);
-f(137438953216, 256);
-f(137975824127, 257);
-f(274341035521, 511);
-f(274877906432, 512);
-f(275414777343, 513);
-f(549218941953, 1023);
-f(549755812864, 1024);
-f(550292683775, 1025);
-f(1098974754817, 2047);
-f(1099511625728, 2048);
-f(1100048496639, 2049);
-f(2198486380545, 4095);
-f(2199023251456, 4096);
-f(2199560122367, 4097);
-f(4397509632001, 8191);
-f(4398046502912, 8192);
-f(4398583373823, 8193);
-f(8795556134913, 16383);
-f(8796093005824, 16384);
-f(8796629876735, 16385);
-f(17591649140737, 32767);
-f(17592186011648, 32768);
-f(17592722882559, 32769);
-f(35183835152385, 65535);
-f(35184372023296, 65536);
-f(35184908894207, 65537);
-f(70368207175681, 131071);
-f(70368744046592, 131072);
-f(70369280917503, 131073);
-f(140736951222273, 262143);
-f(140737488093184, 262144);
-f(140738024964095, 262145);
-f(281474439315457, 524287);
-f(281474976186368, 524288);
-f(281475513057279, 524289);
-f(562949415501825, 1048575);
-f(562949952372736, 1048576);
-f(562950489243647, 1048577);
-f(1125899367874561, 2097151);
-f(1125899904745472, 2097152);
-f(1125900441616383, 2097153);
-x = 536870912;
-f(0, 0);
-f(536870912, 1);
-f(1073741824, 2);
-f(1610612736, 3);
-f(2147483648, 4);
-f(2684354560, 5);
-f(3758096384, 7);
-f(4294967296, 8);
-f(4831838208, 9);
-f(8053063680, 15);
-f(8589934592, 16);
-f(9126805504, 17);
-f(16642998272, 31);
-f(17179869184, 32);
-f(17716740096, 33);
-f(33822867456, 63);
-f(34359738368, 64);
-f(34896609280, 65);
-f(68182605824, 127);
-f(68719476736, 128);
-f(69256347648, 129);
-f(136902082560, 255);
-f(137438953472, 256);
-f(137975824384, 257);
-f(274341036032, 511);
-f(274877906944, 512);
-f(275414777856, 513);
-f(549218942976, 1023);
-f(549755813888, 1024);
-f(550292684800, 1025);
-f(1098974756864, 2047);
-f(1099511627776, 2048);
-f(1100048498688, 2049);
-f(2198486384640, 4095);
-f(2199023255552, 4096);
-f(2199560126464, 4097);
-f(4397509640192, 8191);
-f(4398046511104, 8192);
-f(4398583382016, 8193);
-f(8795556151296, 16383);
-f(8796093022208, 16384);
-f(8796629893120, 16385);
-f(17591649173504, 32767);
-f(17592186044416, 32768);
-f(17592722915328, 32769);
-f(35183835217920, 65535);
-f(35184372088832, 65536);
-f(35184908959744, 65537);
-f(70368207306752, 131071);
-f(70368744177664, 131072);
-f(70369281048576, 131073);
-f(140736951484416, 262143);
-f(140737488355328, 262144);
-f(140738025226240, 262145);
-f(281474439839744, 524287);
-f(281474976710656, 524288);
-f(281475513581568, 524289);
-f(562949416550400, 1048575);
-f(562949953421312, 1048576);
-f(562950490292224, 1048577);
-f(1125899369971712, 2097151);
-f(1125899906842624, 2097152);
-f(1125900443713536, 2097153);
-x = 536870913;
-f(0, 0);
-f(536870913, 1);
-f(1073741826, 2);
-f(1610612739, 3);
-f(2147483652, 4);
-f(2684354565, 5);
-f(3758096391, 7);
-f(4294967304, 8);
-f(4831838217, 9);
-f(8053063695, 15);
-f(8589934608, 16);
-f(9126805521, 17);
-f(16642998303, 31);
-f(17179869216, 32);
-f(17716740129, 33);
-f(33822867519, 63);
-f(34359738432, 64);
-f(34896609345, 65);
-f(68182605951, 127);
-f(68719476864, 128);
-f(69256347777, 129);
-f(136902082815, 255);
-f(137438953728, 256);
-f(137975824641, 257);
-f(274341036543, 511);
-f(274877907456, 512);
-f(275414778369, 513);
-f(549218943999, 1023);
-f(549755814912, 1024);
-f(550292685825, 1025);
-f(1098974758911, 2047);
-f(1099511629824, 2048);
-f(1100048500737, 2049);
-f(2198486388735, 4095);
-f(2199023259648, 4096);
-f(2199560130561, 4097);
-f(4397509648383, 8191);
-f(4398046519296, 8192);
-f(4398583390209, 8193);
-f(8795556167679, 16383);
-f(8796093038592, 16384);
-f(8796629909505, 16385);
-f(17591649206271, 32767);
-f(17592186077184, 32768);
-f(17592722948097, 32769);
-f(35183835283455, 65535);
-f(35184372154368, 65536);
-f(35184909025281, 65537);
-f(70368207437823, 131071);
-f(70368744308736, 131072);
-f(70369281179649, 131073);
-f(140736951746559, 262143);
-f(140737488617472, 262144);
-f(140738025488385, 262145);
-f(281474440364031, 524287);
-f(281474977234944, 524288);
-f(281475514105857, 524289);
-f(562949417598975, 1048575);
-f(562949954469888, 1048576);
-f(562950491340801, 1048577);
-f(1125899372068863, 2097151);
-f(1125899908939776, 2097152);
-f(1125900445810689, 2097153);
-x = 1073741823;
-f(0, 0);
-f(1073741823, 1);
-f(2147483646, 2);
-f(3221225469, 3);
-f(4294967292, 4);
-f(5368709115, 5);
-f(7516192761, 7);
-f(8589934584, 8);
-f(9663676407, 9);
-f(16106127345, 15);
-f(17179869168, 16);
-f(18253610991, 17);
-f(33285996513, 31);
-f(34359738336, 32);
-f(35433480159, 33);
-f(67645734849, 63);
-f(68719476672, 64);
-f(69793218495, 65);
-f(136365211521, 127);
-f(137438953344, 128);
-f(138512695167, 129);
-f(273804164865, 255);
-f(274877906688, 256);
-f(275951648511, 257);
-f(548682071553, 511);
-f(549755813376, 512);
-f(550829555199, 513);
-f(1098437884929, 1023);
-f(1099511626752, 1024);
-f(1100585368575, 1025);
-f(2197949511681, 2047);
-f(2199023253504, 2048);
-f(2200096995327, 2049);
-f(4396972765185, 4095);
-f(4398046507008, 4096);
-f(4399120248831, 4097);
-f(8795019272193, 8191);
-f(8796093014016, 8192);
-f(8797166755839, 8193);
-f(17591112286209, 16383);
-f(17592186028032, 16384);
-f(17593259769855, 16385);
-f(35183298314241, 32767);
-f(35184372056064, 32768);
-f(35185445797887, 32769);
-f(70367670370305, 65535);
-f(70368744112128, 65536);
-f(70369817853951, 65537);
-f(140736414482433, 131071);
-f(140737488224256, 131072);
-f(140738561966079, 131073);
-f(281473902706689, 262143);
-f(281474976448512, 262144);
-f(281476050190335, 262145);
-f(562948879155201, 524287);
-f(562949952897024, 524288);
-f(562951026638847, 524289);
-f(1125898832052225, 1048575);
-f(1125899905794048, 1048576);
-f(1125900979535871, 1048577);
-x = 1073741824;
-f(0, 0);
-f(1073741824, 1);
-f(2147483648, 2);
-f(3221225472, 3);
-f(4294967296, 4);
-f(5368709120, 5);
-f(7516192768, 7);
-f(8589934592, 8);
-f(9663676416, 9);
-f(16106127360, 15);
-f(17179869184, 16);
-f(18253611008, 17);
-f(33285996544, 31);
-f(34359738368, 32);
-f(35433480192, 33);
-f(67645734912, 63);
-f(68719476736, 64);
-f(69793218560, 65);
-f(136365211648, 127);
-f(137438953472, 128);
-f(138512695296, 129);
-f(273804165120, 255);
-f(274877906944, 256);
-f(275951648768, 257);
-f(548682072064, 511);
-f(549755813888, 512);
-f(550829555712, 513);
-f(1098437885952, 1023);
-f(1099511627776, 1024);
-f(1100585369600, 1025);
-f(2197949513728, 2047);
-f(2199023255552, 2048);
-f(2200096997376, 2049);
-f(4396972769280, 4095);
-f(4398046511104, 4096);
-f(4399120252928, 4097);
-f(8795019280384, 8191);
-f(8796093022208, 8192);
-f(8797166764032, 8193);
-f(17591112302592, 16383);
-f(17592186044416, 16384);
-f(17593259786240, 16385);
-f(35183298347008, 32767);
-f(35184372088832, 32768);
-f(35185445830656, 32769);
-f(70367670435840, 65535);
-f(70368744177664, 65536);
-f(70369817919488, 65537);
-f(140736414613504, 131071);
-f(140737488355328, 131072);
-f(140738562097152, 131073);
-f(281473902968832, 262143);
-f(281474976710656, 262144);
-f(281476050452480, 262145);
-f(562948879679488, 524287);
-f(562949953421312, 524288);
-f(562951027163136, 524289);
-f(1125898833100800, 1048575);
-f(1125899906842624, 1048576);
-f(1125900980584448, 1048577);
-x = 1073741825;
-f(0, 0);
-f(1073741825, 1);
-f(2147483650, 2);
-f(3221225475, 3);
-f(4294967300, 4);
-f(5368709125, 5);
-f(7516192775, 7);
-f(8589934600, 8);
-f(9663676425, 9);
-f(16106127375, 15);
-f(17179869200, 16);
-f(18253611025, 17);
-f(33285996575, 31);
-f(34359738400, 32);
-f(35433480225, 33);
-f(67645734975, 63);
-f(68719476800, 64);
-f(69793218625, 65);
-f(136365211775, 127);
-f(137438953600, 128);
-f(138512695425, 129);
-f(273804165375, 255);
-f(274877907200, 256);
-f(275951649025, 257);
-f(548682072575, 511);
-f(549755814400, 512);
-f(550829556225, 513);
-f(1098437886975, 1023);
-f(1099511628800, 1024);
-f(1100585370625, 1025);
-f(2197949515775, 2047);
-f(2199023257600, 2048);
-f(2200096999425, 2049);
-f(4396972773375, 4095);
-f(4398046515200, 4096);
-f(4399120257025, 4097);
-f(8795019288575, 8191);
-f(8796093030400, 8192);
-f(8797166772225, 8193);
-f(17591112318975, 16383);
-f(17592186060800, 16384);
-f(17593259802625, 16385);
-f(35183298379775, 32767);
-f(35184372121600, 32768);
-f(35185445863425, 32769);
-f(70367670501375, 65535);
-f(70368744243200, 65536);
-f(70369817985025, 65537);
-f(140736414744575, 131071);
-f(140737488486400, 131072);
-f(140738562228225, 131073);
-f(281473903230975, 262143);
-f(281474976972800, 262144);
-f(281476050714625, 262145);
-f(562948880203775, 524287);
-f(562949953945600, 524288);
-f(562951027687425, 524289);
-f(1125898834149375, 1048575);
-f(1125899907891200, 1048576);
-f(1125900981633025, 1048577);
-x = 2147483647;
-f(0, 0);
-f(2147483647, 1);
-f(4294967294, 2);
-f(6442450941, 3);
-f(8589934588, 4);
-f(10737418235, 5);
-f(15032385529, 7);
-f(17179869176, 8);
-f(19327352823, 9);
-f(32212254705, 15);
-f(34359738352, 16);
-f(36507221999, 17);
-f(66571993057, 31);
-f(68719476704, 32);
-f(70866960351, 33);
-f(135291469761, 63);
-f(137438953408, 64);
-f(139586437055, 65);
-f(272730423169, 127);
-f(274877906816, 128);
-f(277025390463, 129);
-f(547608329985, 255);
-f(549755813632, 256);
-f(551903297279, 257);
-f(1097364143617, 511);
-f(1099511627264, 512);
-f(1101659110911, 513);
-f(2196875770881, 1023);
-f(2199023254528, 1024);
-f(2201170738175, 1025);
-f(4395899025409, 2047);
-f(4398046509056, 2048);
-f(4400193992703, 2049);
-f(8793945534465, 4095);
-f(8796093018112, 4096);
-f(8798240501759, 4097);
-f(17590038552577, 8191);
-f(17592186036224, 8192);
-f(17594333519871, 8193);
-f(35182224588801, 16383);
-f(35184372072448, 16384);
-f(35186519556095, 16385);
-f(70366596661249, 32767);
-f(70368744144896, 32768);
-f(70370891628543, 32769);
-f(140735340806145, 65535);
-f(140737488289792, 65536);
-f(140739635773439, 65537);
-f(281472829095937, 131071);
-f(281474976579584, 131072);
-f(281477124063231, 131073);
-f(562947805675521, 262143);
-f(562949953159168, 262144);
-f(562952100642815, 262145);
-f(1125897758834689, 524287);
-f(1125899906318336, 524288);
-f(1125902053801983, 524289);
-x = 2147483648;
-f(0, 0);
-f(2147483648, 1);
-f(4294967296, 2);
-f(6442450944, 3);
-f(8589934592, 4);
-f(10737418240, 5);
-f(15032385536, 7);
-f(17179869184, 8);
-f(19327352832, 9);
-f(32212254720, 15);
-f(34359738368, 16);
-f(36507222016, 17);
-f(66571993088, 31);
-f(68719476736, 32);
-f(70866960384, 33);
-f(135291469824, 63);
-f(137438953472, 64);
-f(139586437120, 65);
-f(272730423296, 127);
-f(274877906944, 128);
-f(277025390592, 129);
-f(547608330240, 255);
-f(549755813888, 256);
-f(551903297536, 257);
-f(1097364144128, 511);
-f(1099511627776, 512);
-f(1101659111424, 513);
-f(2196875771904, 1023);
-f(2199023255552, 1024);
-f(2201170739200, 1025);
-f(4395899027456, 2047);
-f(4398046511104, 2048);
-f(4400193994752, 2049);
-f(8793945538560, 4095);
-f(8796093022208, 4096);
-f(8798240505856, 4097);
-f(17590038560768, 8191);
-f(17592186044416, 8192);
-f(17594333528064, 8193);
-f(35182224605184, 16383);
-f(35184372088832, 16384);
-f(35186519572480, 16385);
-f(70366596694016, 32767);
-f(70368744177664, 32768);
-f(70370891661312, 32769);
-f(140735340871680, 65535);
-f(140737488355328, 65536);
-f(140739635838976, 65537);
-f(281472829227008, 131071);
-f(281474976710656, 131072);
-f(281477124194304, 131073);
-f(562947805937664, 262143);
-f(562949953421312, 262144);
-f(562952100904960, 262145);
-f(1125897759358976, 524287);
-f(1125899906842624, 524288);
-f(1125902054326272, 524289);
-x = 2147483649;
-f(0, 0);
-f(2147483649, 1);
-f(4294967298, 2);
-f(6442450947, 3);
-f(8589934596, 4);
-f(10737418245, 5);
-f(15032385543, 7);
-f(17179869192, 8);
-f(19327352841, 9);
-f(32212254735, 15);
-f(34359738384, 16);
-f(36507222033, 17);
-f(66571993119, 31);
-f(68719476768, 32);
-f(70866960417, 33);
-f(135291469887, 63);
-f(137438953536, 64);
-f(139586437185, 65);
-f(272730423423, 127);
-f(274877907072, 128);
-f(277025390721, 129);
-f(547608330495, 255);
-f(549755814144, 256);
-f(551903297793, 257);
-f(1097364144639, 511);
-f(1099511628288, 512);
-f(1101659111937, 513);
-f(2196875772927, 1023);
-f(2199023256576, 1024);
-f(2201170740225, 1025);
-f(4395899029503, 2047);
-f(4398046513152, 2048);
-f(4400193996801, 2049);
-f(8793945542655, 4095);
-f(8796093026304, 4096);
-f(8798240509953, 4097);
-f(17590038568959, 8191);
-f(17592186052608, 8192);
-f(17594333536257, 8193);
-f(35182224621567, 16383);
-f(35184372105216, 16384);
-f(35186519588865, 16385);
-f(70366596726783, 32767);
-f(70368744210432, 32768);
-f(70370891694081, 32769);
-f(140735340937215, 65535);
-f(140737488420864, 65536);
-f(140739635904513, 65537);
-f(281472829358079, 131071);
-f(281474976841728, 131072);
-f(281477124325377, 131073);
-f(562947806199807, 262143);
-f(562949953683456, 262144);
-f(562952101167105, 262145);
-f(1125897759883263, 524287);
-f(1125899907366912, 524288);
-f(1125902054850561, 524289);
-x = 4294967295;
-f(0, 0);
-f(4294967295, 1);
-f(8589934590, 2);
-f(12884901885, 3);
-f(17179869180, 4);
-f(21474836475, 5);
-f(30064771065, 7);
-f(34359738360, 8);
-f(38654705655, 9);
-f(64424509425, 15);
-f(68719476720, 16);
-f(73014444015, 17);
-f(133143986145, 31);
-f(137438953440, 32);
-f(141733920735, 33);
-f(270582939585, 63);
-f(274877906880, 64);
-f(279172874175, 65);
-f(545460846465, 127);
-f(549755813760, 128);
-f(554050781055, 129);
-f(1095216660225, 255);
-f(1099511627520, 256);
-f(1103806594815, 257);
-f(2194728287745, 511);
-f(2199023255040, 512);
-f(2203318222335, 513);
-f(4393751542785, 1023);
-f(4398046510080, 1024);
-f(4402341477375, 1025);
-f(8791798052865, 2047);
-f(8796093020160, 2048);
-f(8800387987455, 2049);
-f(17587891073025, 4095);
-f(17592186040320, 4096);
-f(17596481007615, 4097);
-f(35180077113345, 8191);
-f(35184372080640, 8192);
-f(35188667047935, 8193);
-f(70364449193985, 16383);
-f(70368744161280, 16384);
-f(70373039128575, 16385);
-f(140733193355265, 32767);
-f(140737488322560, 32768);
-f(140741783289855, 32769);
-f(281470681677825, 65535);
-f(281474976645120, 65536);
-f(281479271612415, 65537);
-f(562945658322945, 131071);
-f(562949953290240, 131072);
-f(562954248257535, 131073);
-f(1125895611613185, 262143);
-f(1125899906580480, 262144);
-f(1125904201547775, 262145);
-x = 4294967296;
-f(0, 0);
-f(4294967296, 1);
-f(8589934592, 2);
-f(12884901888, 3);
-f(17179869184, 4);
-f(21474836480, 5);
-f(30064771072, 7);
-f(34359738368, 8);
-f(38654705664, 9);
-f(64424509440, 15);
-f(68719476736, 16);
-f(73014444032, 17);
-f(133143986176, 31);
-f(137438953472, 32);
-f(141733920768, 33);
-f(270582939648, 63);
-f(274877906944, 64);
-f(279172874240, 65);
-f(545460846592, 127);
-f(549755813888, 128);
-f(554050781184, 129);
-f(1095216660480, 255);
-f(1099511627776, 256);
-f(1103806595072, 257);
-f(2194728288256, 511);
-f(2199023255552, 512);
-f(2203318222848, 513);
-f(4393751543808, 1023);
-f(4398046511104, 1024);
-f(4402341478400, 1025);
-f(8791798054912, 2047);
-f(8796093022208, 2048);
-f(8800387989504, 2049);
-f(17587891077120, 4095);
-f(17592186044416, 4096);
-f(17596481011712, 4097);
-f(35180077121536, 8191);
-f(35184372088832, 8192);
-f(35188667056128, 8193);
-f(70364449210368, 16383);
-f(70368744177664, 16384);
-f(70373039144960, 16385);
-f(140733193388032, 32767);
-f(140737488355328, 32768);
-f(140741783322624, 32769);
-f(281470681743360, 65535);
-f(281474976710656, 65536);
-f(281479271677952, 65537);
-f(562945658454016, 131071);
-f(562949953421312, 131072);
-f(562954248388608, 131073);
-f(1125895611875328, 262143);
-f(1125899906842624, 262144);
-f(1125904201809920, 262145);
-x = 4294967297;
-f(0, 0);
-f(4294967297, 1);
-f(8589934594, 2);
-f(12884901891, 3);
-f(17179869188, 4);
-f(21474836485, 5);
-f(30064771079, 7);
-f(34359738376, 8);
-f(38654705673, 9);
-f(64424509455, 15);
-f(68719476752, 16);
-f(73014444049, 17);
-f(133143986207, 31);
-f(137438953504, 32);
-f(141733920801, 33);
-f(270582939711, 63);
-f(274877907008, 64);
-f(279172874305, 65);
-f(545460846719, 127);
-f(549755814016, 128);
-f(554050781313, 129);
-f(1095216660735, 255);
-f(1099511628032, 256);
-f(1103806595329, 257);
-f(2194728288767, 511);
-f(2199023256064, 512);
-f(2203318223361, 513);
-f(4393751544831, 1023);
-f(4398046512128, 1024);
-f(4402341479425, 1025);
-f(8791798056959, 2047);
-f(8796093024256, 2048);
-f(8800387991553, 2049);
-f(17587891081215, 4095);
-f(17592186048512, 4096);
-f(17596481015809, 4097);
-f(35180077129727, 8191);
-f(35184372097024, 8192);
-f(35188667064321, 8193);
-f(70364449226751, 16383);
-f(70368744194048, 16384);
-f(70373039161345, 16385);
-f(140733193420799, 32767);
-f(140737488388096, 32768);
-f(140741783355393, 32769);
-f(281470681808895, 65535);
-f(281474976776192, 65536);
-f(281479271743489, 65537);
-f(562945658585087, 131071);
-f(562949953552384, 131072);
-f(562954248519681, 131073);
-f(1125895612137471, 262143);
-f(1125899907104768, 262144);
-f(1125904202072065, 262145);
-x = 8589934591;
-f(0, 0);
-f(8589934591, 1);
-f(17179869182, 2);
-f(25769803773, 3);
-f(34359738364, 4);
-f(42949672955, 5);
-f(60129542137, 7);
-f(68719476728, 8);
-f(77309411319, 9);
-f(128849018865, 15);
-f(137438953456, 16);
-f(146028888047, 17);
-f(266287972321, 31);
-f(274877906912, 32);
-f(283467841503, 33);
-f(541165879233, 63);
-f(549755813824, 64);
-f(558345748415, 65);
-f(1090921693057, 127);
-f(1099511627648, 128);
-f(1108101562239, 129);
-f(2190433320705, 255);
-f(2199023255296, 256);
-f(2207613189887, 257);
-f(4389456576001, 511);
-f(4398046510592, 512);
-f(4406636445183, 513);
-f(8787503086593, 1023);
-f(8796093021184, 1024);
-f(8804682955775, 1025);
-f(17583596107777, 2047);
-f(17592186042368, 2048);
-f(17600775976959, 2049);
-f(35175782150145, 4095);
-f(35184372084736, 4096);
-f(35192962019327, 4097);
-f(70360154234881, 8191);
-f(70368744169472, 8192);
-f(70377334104063, 8193);
-f(140728898404353, 16383);
-f(140737488338944, 16384);
-f(140746078273535, 16385);
-f(281466386743297, 32767);
-f(281474976677888, 32768);
-f(281483566612479, 32769);
-f(562941363421185, 65535);
-f(562949953355776, 65536);
-f(562958543290367, 65537);
-f(1125891316776961, 131071);
-f(1125899906711552, 131072);
-f(1125908496646143, 131073);
-x = 8589934592;
-f(0, 0);
-f(8589934592, 1);
-f(17179869184, 2);
-f(25769803776, 3);
-f(34359738368, 4);
-f(42949672960, 5);
-f(60129542144, 7);
-f(68719476736, 8);
-f(77309411328, 9);
-f(128849018880, 15);
-f(137438953472, 16);
-f(146028888064, 17);
-f(266287972352, 31);
-f(274877906944, 32);
-f(283467841536, 33);
-f(541165879296, 63);
-f(549755813888, 64);
-f(558345748480, 65);
-f(1090921693184, 127);
-f(1099511627776, 128);
-f(1108101562368, 129);
-f(2190433320960, 255);
-f(2199023255552, 256);
-f(2207613190144, 257);
-f(4389456576512, 511);
-f(4398046511104, 512);
-f(4406636445696, 513);
-f(8787503087616, 1023);
-f(8796093022208, 1024);
-f(8804682956800, 1025);
-f(17583596109824, 2047);
-f(17592186044416, 2048);
-f(17600775979008, 2049);
-f(35175782154240, 4095);
-f(35184372088832, 4096);
-f(35192962023424, 4097);
-f(70360154243072, 8191);
-f(70368744177664, 8192);
-f(70377334112256, 8193);
-f(140728898420736, 16383);
-f(140737488355328, 16384);
-f(140746078289920, 16385);
-f(281466386776064, 32767);
-f(281474976710656, 32768);
-f(281483566645248, 32769);
-f(562941363486720, 65535);
-f(562949953421312, 65536);
-f(562958543355904, 65537);
-f(1125891316908032, 131071);
-f(1125899906842624, 131072);
-f(1125908496777216, 131073);
-x = 8589934593;
-f(0, 0);
-f(8589934593, 1);
-f(17179869186, 2);
-f(25769803779, 3);
-f(34359738372, 4);
-f(42949672965, 5);
-f(60129542151, 7);
-f(68719476744, 8);
-f(77309411337, 9);
-f(128849018895, 15);
-f(137438953488, 16);
-f(146028888081, 17);
-f(266287972383, 31);
-f(274877906976, 32);
-f(283467841569, 33);
-f(541165879359, 63);
-f(549755813952, 64);
-f(558345748545, 65);
-f(1090921693311, 127);
-f(1099511627904, 128);
-f(1108101562497, 129);
-f(2190433321215, 255);
-f(2199023255808, 256);
-f(2207613190401, 257);
-f(4389456577023, 511);
-f(4398046511616, 512);
-f(4406636446209, 513);
-f(8787503088639, 1023);
-f(8796093023232, 1024);
-f(8804682957825, 1025);
-f(17583596111871, 2047);
-f(17592186046464, 2048);
-f(17600775981057, 2049);
-f(35175782158335, 4095);
-f(35184372092928, 4096);
-f(35192962027521, 4097);
-f(70360154251263, 8191);
-f(70368744185856, 8192);
-f(70377334120449, 8193);
-f(140728898437119, 16383);
-f(140737488371712, 16384);
-f(140746078306305, 16385);
-f(281466386808831, 32767);
-f(281474976743424, 32768);
-f(281483566678017, 32769);
-f(562941363552255, 65535);
-f(562949953486848, 65536);
-f(562958543421441, 65537);
-f(1125891317039103, 131071);
-f(1125899906973696, 131072);
-f(1125908496908289, 131073);
-x = 17179869183;
-f(0, 0);
-f(17179869183, 1);
-f(34359738366, 2);
-f(51539607549, 3);
-f(68719476732, 4);
-f(85899345915, 5);
-f(120259084281, 7);
-f(137438953464, 8);
-f(154618822647, 9);
-f(257698037745, 15);
-f(274877906928, 16);
-f(292057776111, 17);
-f(532575944673, 31);
-f(549755813856, 32);
-f(566935683039, 33);
-f(1082331758529, 63);
-f(1099511627712, 64);
-f(1116691496895, 65);
-f(2181843386241, 127);
-f(2199023255424, 128);
-f(2216203124607, 129);
-f(4380866641665, 255);
-f(4398046510848, 256);
-f(4415226380031, 257);
-f(8778913152513, 511);
-f(8796093021696, 512);
-f(8813272890879, 513);
-f(17575006174209, 1023);
-f(17592186043392, 1024);
-f(17609365912575, 1025);
-f(35167192217601, 2047);
-f(35184372086784, 2048);
-f(35201551955967, 2049);
-f(70351564304385, 4095);
-f(70368744173568, 4096);
-f(70385924042751, 4097);
-f(140720308477953, 8191);
-f(140737488347136, 8192);
-f(140754668216319, 8193);
-f(281457796825089, 16383);
-f(281474976694272, 16384);
-f(281492156563455, 16385);
-f(562932773519361, 32767);
-f(562949953388544, 32768);
-f(562967133257727, 32769);
-f(1125882726907905, 65535);
-f(1125899906777088, 65536);
-f(1125917086646271, 65537);
-x = 17179869184;
-f(0, 0);
-f(17179869184, 1);
-f(34359738368, 2);
-f(51539607552, 3);
-f(68719476736, 4);
-f(85899345920, 5);
-f(120259084288, 7);
-f(137438953472, 8);
-f(154618822656, 9);
-f(257698037760, 15);
-f(274877906944, 16);
-f(292057776128, 17);
-f(532575944704, 31);
-f(549755813888, 32);
-f(566935683072, 33);
-f(1082331758592, 63);
-f(1099511627776, 64);
-f(1116691496960, 65);
-f(2181843386368, 127);
-f(2199023255552, 128);
-f(2216203124736, 129);
-f(4380866641920, 255);
-f(4398046511104, 256);
-f(4415226380288, 257);
-f(8778913153024, 511);
-f(8796093022208, 512);
-f(8813272891392, 513);
-f(17575006175232, 1023);
-f(17592186044416, 1024);
-f(17609365913600, 1025);
-f(35167192219648, 2047);
-f(35184372088832, 2048);
-f(35201551958016, 2049);
-f(70351564308480, 4095);
-f(70368744177664, 4096);
-f(70385924046848, 4097);
-f(140720308486144, 8191);
-f(140737488355328, 8192);
-f(140754668224512, 8193);
-f(281457796841472, 16383);
-f(281474976710656, 16384);
-f(281492156579840, 16385);
-f(562932773552128, 32767);
-f(562949953421312, 32768);
-f(562967133290496, 32769);
-f(1125882726973440, 65535);
-f(1125899906842624, 65536);
-f(1125917086711808, 65537);
-x = 17179869185;
-f(0, 0);
-f(17179869185, 1);
-f(34359738370, 2);
-f(51539607555, 3);
-f(68719476740, 4);
-f(85899345925, 5);
-f(120259084295, 7);
-f(137438953480, 8);
-f(154618822665, 9);
-f(257698037775, 15);
-f(274877906960, 16);
-f(292057776145, 17);
-f(532575944735, 31);
-f(549755813920, 32);
-f(566935683105, 33);
-f(1082331758655, 63);
-f(1099511627840, 64);
-f(1116691497025, 65);
-f(2181843386495, 127);
-f(2199023255680, 128);
-f(2216203124865, 129);
-f(4380866642175, 255);
-f(4398046511360, 256);
-f(4415226380545, 257);
-f(8778913153535, 511);
-f(8796093022720, 512);
-f(8813272891905, 513);
-f(17575006176255, 1023);
-f(17592186045440, 1024);
-f(17609365914625, 1025);
-f(35167192221695, 2047);
-f(35184372090880, 2048);
-f(35201551960065, 2049);
-f(70351564312575, 4095);
-f(70368744181760, 4096);
-f(70385924050945, 4097);
-f(140720308494335, 8191);
-f(140737488363520, 8192);
-f(140754668232705, 8193);
-f(281457796857855, 16383);
-f(281474976727040, 16384);
-f(281492156596225, 16385);
-f(562932773584895, 32767);
-f(562949953454080, 32768);
-f(562967133323265, 32769);
-f(1125882727038975, 65535);
-f(1125899906908160, 65536);
-f(1125917086777345, 65537);
diff --git a/deps/v8/test/mjsunit/numops-fuzz-part1.js b/deps/v8/test/mjsunit/numops-fuzz-part1.js
new file mode 100644
index 0000000000..8e98ae6323
--- /dev/null
+++ b/deps/v8/test/mjsunit/numops-fuzz-part1.js
@@ -0,0 +1,1172 @@
+// Copyright 2011 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+function f() {
+  var x = 0;
+  var tmp = 0;
+  assertEquals(0, x /= (tmp = 798469700.4090232, tmp));
+  assertEquals(0, x *= (2714102322.365509));
+  assertEquals(0, x *= x);
+  assertEquals(139516372, x -= (tmp = -139516372, tmp));
+  assertEquals(1, x /= (x%(2620399703.344006)));
+  assertEquals(0, x >>>= x);
+  assertEquals(-2772151192.8633175, x -= (tmp = 2772151192.8633175, tmp));
+  assertEquals(-2786298206.8633175, x -= (14147014));
+  assertEquals(1509750523, x |= ((1073767916)-(tmp = 919311632.2789925, tmp)));
+  assertEquals(2262404051.926751, x += ((752653528.9267509)%x));
+  assertEquals(-270926893, x |= (tmp = 1837232194, tmp));
+  assertEquals(0.17730273401688765, x /= ((tmp = -2657202795, tmp)-(((((x|(tmp = -1187733892.282897, tmp))-x)<<(556523578))-x)+(-57905508.42881298))));
+  assertEquals(122483.56550261026, x *= ((((tmp = 2570017060.15193, tmp)%((-1862621126.9968336)>>x))>>(x>>(tmp = 2388674677, tmp)))>>>(-2919657526.470434)));
+  assertEquals(0, x ^= x);
+  assertEquals(0, x <<= (tmp = 2705124845.0455265, tmp));
+  assertEquals(0, x &= (-135286835.07069612));
+  assertEquals(-0, x *= ((tmp = -165810479.10020828, tmp)|x));
+  assertEquals(248741888, x += ((735976871.1308595)<<(-2608055185.0700903)));
+  assertEquals(139526144, x &= (tmp = -1454301068, tmp));
+  assertEquals(-0.047221345672746884, x /= (tmp = -2954726130.994727, tmp));
+  assertEquals(0, x <<= (x>>x));
+  assertEquals(0, x >>>= ((x+(912111201.488966))-(tmp = 1405800042.6070075, tmp)));
+  assertEquals(-1663642733, x |= (((-1663642733.5700119)<<(x^x))<<x));
+  assertEquals(-914358272, x <<= ((((-308411676)-(-618261840.9113789))%(-68488626.58621716))-x));
+  assertEquals(-1996488704, x &= (-1358622641.5848842));
+  assertEquals(-345978263, x += (1650510441));
+  assertEquals(3, x >>>= (-1106714178.701668));
+  assertEquals(1, x %= (((x>>(x>>(tmp = -3052773846.817114, tmp)))*(tmp = 1659218887.379526, tmp))&x));
+  assertEquals(-943225672, x += (-943225673));
+  assertEquals(-0.41714300120060854, x /= (tmp = 2261156652, tmp));
+  assertEquals(0, x >>>= ((3107060934.8863482)<<(tmp = 1902730887, tmp)));
+  assertEquals(0, x &= x);
+  assertEquals(1476628, x |= ((tmp = -2782899841.390033, tmp)>>>(2097653770)));
+  assertEquals(0.0008887648921591833, x /= ((tmp = 1661438264.5253348, tmp)%((tmp = 2555939813, tmp)*(-877024323.6515315))));
+  assertEquals(0, x <<= (tmp = -2366551345, tmp));
+  assertEquals(0, x &= (tmp = 1742843591, tmp));
+  assertEquals(0, x -= x);
+  assertEquals(4239, x += ((-3183564176.232031)>>>(349622674.1255014)));
+  assertEquals(-67560, x -= ((2352742295)>>>x));
+  assertEquals(-67560, x &= x);
+  assertEquals(-0.00003219917807302283, x /= (2098190203.699741));
+  assertEquals(0, x -= x);
+  assertEquals(0, x >>= ((((tmp = -869086522.8358297, tmp)/(187820779))-(tmp = -2000970995.1931965, tmp))|(1853528755.6064696)));
+  assertEquals(0, x >>= (-3040509919));
+  assertEquals(0, x %= (((tmp = -2386688049.194946, tmp)<<(tmp = -669711391, tmp))|x));
+  assertEquals(0, x %= (tmp = -298431511.4839926, tmp));
+  assertEquals(0, x /= (2830845091.2793818));
+  assertEquals(0, x /= ((((-2529926178)|x)^((tmp = 2139313707.0894063, tmp)%((-1825768525.0541775)-(-952600362.7758243))))+x));
+  assertEquals(NaN, x /= x);
+  assertEquals(NaN, x -= x);
+  assertEquals(NaN, x /= (tmp = -432944480, tmp));
+  assertEquals(0, x <<= (((((x^((-1777523727)+(2194962794)))>>>(((((-590335134.8224905)%(x*(2198198974)))|(tmp = -2068556796, tmp))/(1060765637))*(-147051676)))/((tmp = -477350113.92686677, tmp)<<((x/(2018712621.0397925))^((tmp = 491163813.3921983, tmp)+(((x|((((x%(1990073256.812654))%((-2024388518.9599915)>>((tmp = 223182187, tmp)*(-722241065))))>>>(tmp = 2517147885.305745, tmp))%(1189996239.11222)))&x)%(-306932860))))))&((tmp = 1117802724.485684, tmp)+((-1391614045)-x)))%((((x>>((2958453447)*x))^(((410825859)|(((tmp = -1119269292.5495896, tmp)>>>(((((((x%(tmp = 648541746.6059314, tmp))*((-2304508480)<<((((x^(1408199888.1454597))|((251623937)|x))/((-382389946.9984102)|(tmp = -2082681143.5893767, tmp)))-(((tmp = 631243472, tmp)>>>(1407556544))/(((x>>>x)>>>(tmp = -6329025.47865057, tmp))>>>(tmp = 948664752.543093, tmp))))))/((((-183248880)>>x)&x)&x))>>x)&(((-978737284.8492057)%(tmp = 2983300011.737006, tmp))&(tmp = 2641937234.2954116, tmp)))<<x)>>(2795416632.9722223)))%((((tmp = -50926632, tmp)/x)&(((tmp = -2510786916, tmp)/x)/(-699755674)))|((((tmp = 1411792593, tmp)>>(924286570.2637128))>>((1609997725)>>(2735658951.0762663)))*(tmp = 726205435, tmp)))))<<(tmp = -2135055357.3156831, tmp)))/(tmp = 1408695065, tmp))^(tmp = -1343267739.8562133, tmp))));
+  assertEquals(0, x %= (-437232116));
+  assertEquals(-2463314518.2747326, x -= (2463314518.2747326));
+  assertEquals(109, x >>= (2401429560));
+  assertEquals(-2687641732.0253763, x += (-2687641841.0253763));
+  assertEquals(-2336375490019484000, x *= (tmp = 869303174.6678596, tmp));
+  assertEquals(5.458650430363785e+36, x *= x);
+  assertEquals(0, x |= ((((-1676972008.797291)*x)*((tmp = 2606991807, tmp)-x))<<x));
+  assertEquals(0, x &= ((-3053393759.3496876)+(-1431008367)));
+  assertEquals(-856728369, x |= (x-(((((764337872)/x)<<((x|(((tmp = 1409368192.1268077, tmp)+(tmp = -848083676, tmp))|(-2797102463.7915916)))^x))/x)^(tmp = 856728369.0589117, tmp))));
+  assertEquals(-0, x %= x);
+  assertEquals(1116550103, x ^= (-3178417193));
+  assertEquals(1116550103, x %= (tmp = -1482481942, tmp));
+  assertEquals(133, x >>>= x);
+  assertEquals(-1.381429241671034e-7, x /= ((tmp = -962771116.8101778, tmp)^x));
+  assertEquals(-1092268961, x |= ((tmp = 3202672531, tmp)-((x-(tmp = 845529357, tmp))>>(tmp = -868680593, tmp))));
+  assertEquals(-1092268961, x %= (tmp = 2670840415.304719, tmp));
+  assertEquals(-122794480, x %= (tmp = 969474481, tmp));
+  assertEquals(-297606521542193600, x *= (2423614820));
+  assertEquals(72460064, x >>>= (tmp = -1230798655, tmp));
+  assertEquals(-203714325373689600, x *= (-2811401400));
+  assertEquals(2154914048, x >>>= (((2241377026.001436)/x)+x));
+  assertEquals(1177864081, x ^= (tmp = -968513903, tmp));
+  assertEquals(35947664, x &= (-2086226758.2704995));
+  assertEquals(20795732539020670, x += (x*(578500247)));
+  assertEquals(-892004992, x >>= x);
+  assertEquals(-7023661.354330708, x /= ((((((1740714214)%((tmp = -459699286, tmp)+(tmp = -1700187400, tmp)))>>(tmp = -3170295237, tmp))+(tmp = -497509780, tmp))+((1971976144.6197853)+(661992813.6077721)))>>>(-1683802728)));
+  assertEquals(-1634205696, x <<= x);
+  assertEquals(-7, x >>= (-3187653764.930914));
+  assertEquals(-5.095345981491203, x -= ((tmp = 748315289, tmp)/(tmp = -392887780, tmp)));
+  assertEquals(1486531570, x &= (1486531570.9300508));
+  assertEquals(5670, x >>= (((tmp = -2486758205.26425, tmp)*(732510414))|x));
+  assertEquals(5670, x >>= (((-1811879946.2553763)%(1797475764))/(((tmp = -2159923884, tmp)|x)+(tmp = -1774410807, tmp))));
+  assertEquals(38, x %= (x>>>x));
+  assertEquals(-151134215, x ^= (((tmp = -2593085609.5622163, tmp)+((tmp = -814992345.7516887, tmp)-(534809571)))|(tmp = -232678571, tmp)));
+  assertEquals(-234881024, x <<= x);
+  assertEquals(-234881024, x <<= (x>>>x));
+  assertEquals(55169095435288580, x *= x);
+  assertEquals(0, x >>= (tmp = 1176612256, tmp));
+  assertEquals(0, x <<= (1321866341.2486475));
+  assertEquals(0, x %= (x-(-602577995)));
+  assertEquals(0, x >>>= (((((tmp = -125628635.79970193, tmp)^(tmp = 1294209955.229382, tmp))&(((tmp = -2353256654.0725203, tmp)|((-1136743028.9425385)|((((950703429.1110399)-(x>>>x))/((((x%(-252705869.21126103))/((tmp = 886957620, tmp)<<(x%((tmp = -1952249741, tmp)*(tmp = -1998149844, tmp)))))|(tmp = 1933366713, tmp))|((tmp = -2957141565, tmp)>>>(tmp = 1408598804, tmp))))+(((((((-2455002047.4910946)%(tmp = -528017836, tmp))&((-2693432769)/(tmp = 2484427670.9045153, tmp)))%(-356969659))-((((((tmp = 3104828644.0753174, tmp)%(x>>>(tmp = 820832137.8175925, tmp)))*((tmp = 763080553.9260503, tmp)+(3173597855)))<<(((-510785437)^x)<<(x|(((x*(x%((tmp = -1391951515, tmp)/x)))-x)|(x-((-522681793.93221474)/((2514619703.2162743)*(2936688324))))))))|x)>>>(-2093210042)))&(763129279.3651779))&x))))-x))%(((-1331164821)&(tmp = 1342684586, tmp))<<(x<<(tmp = 2675008614.588005, tmp))))>>((2625292569.8984914)+(-3185992401))));
+  assertEquals(0, x *= (tmp = 671817215.1147974, tmp));
+  assertEquals(-1608821121, x ^= ((tmp = 2686146175.04077, tmp)>>>x));
+  assertEquals(-0, x %= x);
+  assertEquals(-0, x /= ((tmp = 286794551.0720866, tmp)|(x%x)));
+  assertEquals(0, x <<= (x|(tmp = 1095503996.2285218, tmp)));
+  assertEquals(443296752, x ^= (443296752));
+  assertEquals(110824188, x >>= ((184708570)>>(x&x)));
+  assertEquals(0.7908194935161674, x /= ((((167151154.63381648)&((tmp = -1434120690, tmp)-(tmp = 2346173080, tmp)))/(56656051.87305987))^(140138414)));
+  assertEquals(-0.9027245492678485, x *= ((tmp = 1724366578, tmp)/(((2979477411)<<(((897038568)>>(tmp = 348960298, tmp))%(281056223.2037884)))^((((-1383133388)-(((-1379748375)-((x>>(x&(tmp = 2456582046, tmp)))>>>(-2923911755.565961)))&x))<<(-2825791731))^(tmp = -1979992970, tmp)))));
+  assertEquals(0, x &= (2482304279));
+  assertEquals(-0, x *= (-2284213673));
+  assertEquals(0, x <<= ((2874381218.015819)|x));
+  assertEquals(0, x *= (x>>>(tmp = 2172786480, tmp)));
+  assertEquals(0, x &= (-1638727867.2978938));
+  assertEquals(0, x %= ((tmp = -2213947368.285817, tmp)>>x));
+  assertEquals(0, x >>>= (tmp = -531324706, tmp));
+  assertEquals(0, x %= (tmp = -2338792486, tmp));
+  assertEquals(0, x <<= (((tmp = 351012164, tmp)<<(x|((tmp = -3023836638.5337825, tmp)^(-2678806692))))|x));
+  assertEquals(0, x %= (x-(tmp = -3220231305.45039, tmp)));
+  assertEquals(0, x <<= (-2132833261));
+  assertEquals(0, x >>>= x);
+  assertEquals(0, x %= ((2544970469)+(((-2633093458.5911965)&(644108176))-(x>>>(tmp = -949043718, tmp)))));
+  assertEquals(-2750531265, x += (-2750531265));
+  assertEquals(0, x >>= x);
+  assertEquals(0, x *= ((tmp = 1299005700, tmp)-x));
+  assertEquals(0, x >>= x);
+  assertEquals(-1785515304, x -= (((((-806054462.5563161)/x)>>>x)+(1785515304))|((tmp = 2937069788.9396844, tmp)/x)));
+  assertEquals(-3810117159.173689, x -= (2024601855.1736891));
+  assertEquals(-6.276064139320051, x /= (607087033.3053156));
+  assertEquals(134217727, x >>>= (((x%(tmp = 924293127, tmp))^x)|((x>>>(x&((((tmp = -413386639, tmp)/(x>>(tmp = 599075308.8479941, tmp)))^(tmp = -1076703198, tmp))*((tmp = -2239117284, tmp)>>(655036983)))))-x)));
+  assertEquals(134217727, x %= (tmp = 2452642261.038778, tmp));
+  assertEquals(-569504740360507, x *= ((tmp = -1086243941, tmp)>>(tmp = 1850668904.4885683, tmp)));
+  assertEquals(113378806, x >>>= (tmp = -2558233435, tmp));
+  assertEquals(979264375, x -= (((x>>(1950008052))%((2917183569.0209)*(tmp = 1184250640.446752, tmp)))|((((tmp = -691875212, tmp)-(-2872881803))>>(tmp = 44162204.97461021, tmp))^(tmp = 865885647, tmp))));
+  assertEquals(-1127813632, x <<= ((((tmp = -2210499281, tmp)>>>x)-(tmp = 2359697240, tmp))-x));
+  assertEquals(-1707799657, x ^= (653518231.3995534));
+  assertEquals(2916579668449318000, x *= x);
+  assertEquals(2916579669254640600, x += (x&(tmp = 2986558026.399422, tmp)));
+  assertEquals(870995175, x ^= (2598813927.8991632));
+  assertEquals(870995175, x %= (-2857038782));
+  assertEquals(1869503575895591000, x *= (x|(x|(((tmp = 2478650307.4118147, tmp)*((tmp = 2576240847.476932, tmp)>>>x))<<x))));
+  assertEquals(-134947790, x |= ((tmp = 1150911808, tmp)*((2847735464)/(-2603172652.929262))));
+  assertEquals(-137053182, x -= ((tmp = 2155921819.0929346, tmp)>>>(x-(((-1960937402)-(-1907735074.2875962))%((1827808310)^(tmp = -2788307127, tmp))))));
+  assertEquals(-134824702, x |= (((2912578752.2395406)^(x%(((-2585660111.0638976)<<(((((tmp = 747742706, tmp)%(-1630261205))&((((x|(x|(-2619903144.278758)))|((2785710568.8651934)>>((-968301967.5982246)<<(x&x))))>>((x>>>((x>>>(tmp = -1402085797.0310762, tmp))*((tmp = -323729645.2250068, tmp)<<(tmp = 2234667799, tmp))))>>>(-167003745)))>>((924665972.4681011)<<x)))>>>x)<<((((x+x)+x)-(((tmp = 2399203431.0526247, tmp)-(-2872533271))-(((tmp = 914778794.2087344, tmp)-(tmp = 806353942.9502392, tmp))|(((tmp = 262924334.99231672, tmp)&x)|(tmp = -460248836.5602243, tmp)))))/x)))%((-1681000689)/(tmp = -2805054623.654228, tmp)))))*(tmp = 957346233.9619625, tmp)));
+  assertEquals(-3274838, x %= ((((tmp = 3155450543.3524327, tmp)>>>x)<<(tmp = 2103079652.3410985, tmp))>>x));
+  assertEquals(-3274838, x |= ((((tmp = 2148004645.639173, tmp)>>>(tmp = -1285119223, tmp))<<(((((-711596054)>>>(tmp = -2779776371.3473206, tmp))^(((((tmp = -1338880329.383915, tmp)<<((-1245247254.477341)>>x))*(tmp = -2649052844.20065, tmp))>>((1734345880.4600453)%(x/(2723093117.118899))))*(1252918475.3285656)))<<(2911356885))^x))<<(-1019761103)));
+  assertEquals(1703281954, x &= (((tmp = 1036570471.7412028, tmp)+((tmp = 3043119517, tmp)%(2374310816.8346715)))%(tmp = -2979155076, tmp)));
+  assertEquals(1741588391, x |= ((tmp = 1230009575.6003838, tmp)>>>(-1247515003.8152597)));
+  assertEquals(72869474.64782429, x %= (tmp = 1668718916.3521757, tmp));
+  assertEquals(770936242.104203, x += (698066767.4563787));
+  assertEquals(-0.2820604726420833, x /= (tmp = -2733230342, tmp));
+  assertEquals(403480578, x |= ((969730374)&(tmp = 1577889835, tmp)));
+  assertEquals(-1669557233, x ^= ((-1616812135)+(tmp = -456209292, tmp)));
+  assertEquals(-1630427, x >>= ((2327783031.1175823)/(226947662.4579488)));
+  assertEquals(131022, x >>>= ((tmp = -1325018897.2482083, tmp)>>(x&((((((-1588579772.9240348)<<(tmp = -1775580288.356329, tmp))<<(tmp = -1021528325.2075481, tmp))>>((tmp = 2373033451.079956, tmp)*(tmp = 810304612, tmp)))-((tmp = -639152097, tmp)<<(tmp = 513879484, tmp)))&(2593958513)))));
+  assertEquals(1, x >>= ((3033200222)-x));
+  assertEquals(-561146816.4851823, x += (tmp = -561146817.4851823, tmp));
+  assertEquals(-4.347990105831158, x /= ((((-1270435902)*x)%((tmp = 637328492.7386824, tmp)-(x>>(-749100689))))%(x+x)));
+  assertEquals(-1, x >>= x);
+  assertEquals(1, x *= x);
+  assertEquals(111316849706694460, x += ((966274056)*(x|(115202150))));
+  assertEquals(-1001883840, x >>= x);
+  assertEquals(-1001883840, x &= x);
+  assertEquals(-3006880758, x += ((((-2275110637.4054556)/((x+(tmp = -1390035090.4324536, tmp))>>(-5910593)))&(tmp = 378982420, tmp))|(tmp = 2289970378.568629, tmp)));
+  assertEquals(314474, x >>>= (x>>((tmp = -228007336.31281257, tmp)%(tmp = 1127648013, tmp))));
+  assertEquals(-17694827, x ^= ((tmp = 2095133598.1849852, tmp)|(-1978322311)));
+  assertEquals(1, x /= x);
+  assertEquals(1, x %= (-2323617209.7531185));
+  assertEquals(0, x >>>= (x*(tmp = -1574455400.489434, tmp)));
+  assertEquals(0, x >>= (3131854684));
+  assertEquals(2853609824, x += ((-231012098)-(tmp = -3084621922, tmp)));
+  assertEquals(8143089027629311000, x *= x);
+  assertEquals(313052685, x ^= (tmp = 2962303501, tmp));
+  assertEquals(4776, x >>= (tmp = 2271457232, tmp));
+  assertEquals(0.000002812258572702285, x /= (tmp = 1698279115, tmp));
+  assertEquals(0, x >>>= (tmp = 1698465782.0927145, tmp));
+  assertEquals(0, x <<= x);
+  assertEquals(0, x |= ((x<<((-1824760240.3040407)<<(2798263764.39145)))&(tmp = 1795988253.0493627, tmp)));
+  assertEquals(1782206945, x ^= (-2512760351.7881565));
+  assertEquals(7610569113843172000, x *= (((tmp = -44415823.92972565, tmp)&(tmp = 1402483498.9421625, tmp))+(tmp = 2909778666, tmp)));
+  assertEquals(15221138227873292000, x += (x-(tmp = -186948658.394145, tmp)));
+  assertEquals(0, x -= x);
+  assertEquals(-2238823252, x -= ((tmp = 2238823252, tmp)+x));
+  assertEquals(0, x -= x);
+  assertEquals(0, x >>= (2976069570));
+  assertEquals(0, x >>= ((tmp = -2358157433, tmp)/x));
+  assertEquals(-949967713, x ^= (tmp = -949967713, tmp));
+  assertEquals(-1, x >>= x);
+  assertEquals(-1522291702.1977966, x *= (1522291702.1977966));
+  assertEquals(-1522291702, x >>= ((((2290279800)|x)|(1793154434.6798015))&((-1161390929.0766077)>>>x)));
+  assertEquals(83894274, x &= (tmp = 1571058486, tmp));
+  assertEquals(43186847.90522933, x += ((tmp = -1131332988.0947707, tmp)%x));
+  assertEquals(0, x >>= (tmp = -1968312707.269359, tmp));
+  assertEquals(0, x &= (2507747643.26175));
+  assertEquals(0, x %= (tmp = 3190525303.366887, tmp));
+  assertEquals(-1968984602, x ^= (((x/(x|(-1607062026.5338054)))<<(tmp = 2207669861.8770065, tmp))+(tmp = 2325982694.956348, tmp)));
+  assertEquals(554, x >>>= (((tmp = -2302283871.993821, tmp)>>>(-3151835112))|(((((x%(-1534374264))/((731246012)<<(((883830997.1194847)<<(((-1337895080.1937215)/(tmp = 3166402571.8157315, tmp))^(tmp = -1563897595.5799441, tmp)))>>(tmp = -556816951.0537591, tmp))))>>(-2682203577))<<(x/((1654294674.865079)+x)))/((x^(-2189474695.4259806))/(-475915245.7363057)))));
+  assertEquals(1372586111, x ^= (1372586581));
+  assertEquals(1166831229, x -= ((-834168138)&(762573579)));
+  assertEquals(2333662456, x -= ((x>>x)-x));
+  assertEquals(-1961304840, x &= x);
+  assertEquals(-2130143128, x &= (2982852718.0711775));
+  assertEquals(1073741824, x <<= (-1446978661.6426942));
+  assertEquals(2097152, x >>>= ((-1424728215)-(((127872198)%(tmp = -2596923298, tmp))&x)));
+  assertEquals(2097152, x >>>= x);
+  assertEquals(0, x &= (x/(tmp = -518419194.42994523, tmp)));
+  assertEquals(0, x >>= ((x/(-1865078245))%(tmp = 2959239210, tmp)));
+  assertEquals(-0, x *= ((x|(-1721307400))|(-3206147171.9491577)));
+  assertEquals(0, x >>>= ((-694741143)&(tmp = -2196513947.699142, tmp)));
+  assertEquals(0, x <<= x);
+  assertEquals(0, x &= ((tmp = 2037824385.8836646, tmp)+((tmp = 1203034986.4647732, tmp)/(x>>>(((-1374881234)/(899771270.3237157))+((-2296524362.8020077)|(-1529870870)))))));
+  assertEquals(0, x >>= (tmp = 2770637816, tmp));
+  assertEquals(0, x ^= x);
+  assertEquals(-1861843456, x |= ((632402668)*((x|(tmp = -1032952662.8269436, tmp))|(tmp = 2671272511, tmp))));
+  assertEquals(-1861843456, x >>= (((x>>>x)+x)<<(-1600908842)));
+  assertEquals(-58182608, x >>= (x-(tmp = -2496617861, tmp)));
+  assertEquals(-3636413, x >>= (tmp = -400700028, tmp));
+  assertEquals(-7272826, x += x);
+  assertEquals(-1, x >>= ((tmp = -3184897005.3614545, tmp)-((-1799843014)|(tmp = 2832132915, tmp))));
+  assertEquals(-121800925.94209385, x *= (121800925.94209385));
+  assertEquals(-30450232, x >>= (-979274206.6261561));
+  assertEquals(-30450232, x >>= (tmp = -1028204832.5078967, tmp));
+  assertEquals(-30450232, x |= x);
+  assertEquals(965888871, x ^= (((((-2157753481.3375635)*((tmp = -1810667184.8165767, tmp)&((tmp = 2503908344.422232, tmp)|x)))>>(x>>(1601560785)))<<x)^(tmp = 943867311.6380403, tmp)));
+  assertEquals(7546006, x >>>= x);
+  assertEquals(7546006, x <<= ((tmp = 1388931761.780241, tmp)*(x-(tmp = -1245147647.0070577, tmp))));
+  assertEquals(12985628, x += (x&(-1520746354)));
+  assertEquals(12985628, x &= x);
+  assertEquals(12985628, x %= (tmp = 308641965, tmp));
+  assertEquals(685733278, x |= ((tmp = -1275653544, tmp)-((tmp = -1956798010.3773859, tmp)%(tmp = 2086889575.643448, tmp))));
+  assertEquals(679679376, x &= (2860752368));
+  assertEquals(1770773904, x |= (x<<(3200659207)));
+  assertEquals(1224886544, x &= (-585733767.6876519));
+  assertEquals(1224886544, x %= ((tmp = -114218494, tmp)-x));
+  assertEquals(1208109328, x &= (tmp = 1854361593, tmp));
+  assertEquals(18434, x >>>= x);
+  assertEquals(-349394636955256100, x *= (x*(-1028198742)));
+  assertEquals(-519536600.7713163, x %= (-1054085356.9120367));
+  assertEquals(-1610612736, x ^= ((tmp = -3126078854, tmp)&x));
+  assertEquals(-2637321565906333700, x *= (1637464740.5658746));
+  assertEquals(-2637321568051070500, x -= ((tmp = -1006718806, tmp)<<(3005848133.106345)));
+  assertEquals(368168695, x ^= (x^(tmp = 368168695.6881037, tmp)));
+  assertEquals(43, x >>>= x);
+  assertEquals(-2081297089, x |= ((167169305.77248895)+(-2248466405.3199244)));
+  assertEquals(-2474622167, x -= (tmp = 393325078, tmp));
+  assertEquals(-135109701, x %= (-1169756233));
+  assertEquals(0, x ^= x);
+  assertEquals(0, x >>= (((((tmp = -164768854, tmp)/(tmp = -1774989993.1909926, tmp))+x)-((-921438912)>>(tmp = -191772028.69249105, tmp)))-(tmp = 558728578.22033, tmp)));
+  assertEquals(0, x %= (tmp = 2188003745, tmp));
+  assertEquals(0, x <<= (((tmp = -999335540, tmp)>>((((325101977)/(tmp = -3036991542, tmp))<<(tmp = -213302488, tmp))+x))|(tmp = -1054204587, tmp)));
+  assertEquals(0, x &= ((2844053429.4720345)>>>x));
+  assertEquals(NaN, x %= x);
+  assertEquals(NaN, x -= (-1481729275.9118822));
+  assertEquals(NaN, x *= (tmp = 1098314618.2397528, tmp));
+  assertEquals(-1073741824, x ^= ((tmp = 1718545772, tmp)<<(((tmp = -81058910, tmp)-(2831123087.424368))+(tmp = 576710057.2361784, tmp))));
+  assertEquals(-2921155898.4793186, x -= (1847414074.4793184));
+  assertEquals(-1295646720, x <<= (2178621744));
+  assertEquals(-0.8906779709597907, x /= ((tmp = -2840292585.6837263, tmp)<<(x&((tmp = 892527695.6172305, tmp)>>>x))));
+  assertEquals(0, x <<= (((tmp = 3149667213.298993, tmp)>>(tmp = 1679370761.7226725, tmp))^(115417747.21537328)));
+  assertEquals(0, x |= x);
+  assertEquals(0, x %= ((-1112849427)>>(-1245508870.7514496)));
+  assertEquals(0, x &= x);
+  assertEquals(0, x |= x);
+  assertEquals(0, x >>>= ((3144100694.930459)>>>(tmp = 2408610503, tmp)));
+  assertEquals(0, x <<= ((tmp = 2671709754.0318713, tmp)%x));
+  assertEquals(0, x >>>= (x|((tmp = -3048578701, tmp)-(674147224))));
+  assertEquals(NaN, x %= x);
+  assertEquals(0, x &= ((tmp = -2084883715, tmp)|(((((-3008427069)+(875536047.4283574))>>>x)%(tmp = -450003426.1091652, tmp))%(((-2956878433.269356)|(x/((((x%((((((x<<(((tmp = -1581063482.510351, tmp)^x)-(tmp = 1364458217, tmp)))^((tmp = 1661446342, tmp)+(1307091014)))/(342270750.9901335))>>>(x&((1760980812.898993)&((tmp = 2878165745.6401143, tmp)/(((tmp = -981178013, tmp)/(-2338761668.29912))>>(-958462630))))))*((1807522840)^((tmp = 1885835034, tmp)^(-2538647938))))*(1673607540.0854697)))%x)>>x)<<x)))<<(853348877.2407281)))));
+  assertEquals(0, x >>>= x);
+  assertEquals(-1162790279, x -= (1162790279));
+  assertEquals(-1162790279, x >>= (((-490178658)*x)/((((((tmp = -1883861998.6699312, tmp)/(tmp = -2369967345.240594, tmp))+(3142759868.266447))&(508784917.8158537))&x)>>(-2129532322))));
+  assertEquals(-1360849740.9829152, x -= (x+(1360849740.9829152)));
+  assertEquals(1928392181, x ^= (-602670783));
+  assertEquals(19478708.898989897, x /= (((-2617861994)>>(tmp = 797256920, tmp))%(-1784987906)));
+  assertEquals(-8648903.575540157, x *= (((tmp = 673979276, tmp)/(-1517908716))%(x/x)));
+  assertEquals(-8648903.575540157, x %= ((((643195610.4221292)>>>(tmp = 2342669302, tmp))>>>(tmp = -1682965878, tmp))^((tmp = -208158937.63443017, tmp)>>((907286989)&(x<<(448634893))))));
+  assertEquals(1399288769, x ^= (tmp = -1407486728, tmp));
+  assertEquals(0, x &= (((1999255838.815517)/(tmp = 564646001, tmp))/(-3075888101.3274765)));
+  assertEquals(0, x ^= ((-78451711.59404826)%x));
+  assertEquals(-1351557131, x |= (2943410165));
+  assertEquals(1715626371, x -= (-3067183502));
+  assertEquals(71434240, x &= ((-1800066426)<<(((((x<<(-324796375))+x)<<(tmp = 2696824955.735132, tmp))^x)%(tmp = 444916469, tmp))));
+  assertEquals(71434240, x >>>= (((x&((x%x)|x))+(tmp = 2226992348.3050146, tmp))<<(-305526260)));
+  assertEquals(0, x -= (x%(tmp = 582790928.5832802, tmp)));
+  assertEquals(0, x *= ((x%(1865155340))>>>((x<<(2600488191))^(-308995123))));
+  assertEquals(0, x >>= (x&(-3120043868.8531103)));
+  assertEquals(0, x |= x);
+  assertEquals(-0, x *= (tmp = -172569944, tmp));
+  assertEquals(0, x <<= (-1664372874));
+  assertEquals(1377713344.6784928, x += (tmp = 1377713344.6784928, tmp));
+  assertEquals(1377713344, x |= x);
+  assertEquals(-232833282, x |= (tmp = 2685870654, tmp));
+  assertEquals(84639, x -= (((((2778531079.998492)%(2029165314))>>>(tmp = -468881172.3729558, tmp))^x)|((x>>>((((x%(3044318992.943596))&(1996754328.2214756))^(1985227172.7485228))%(tmp = -1984848676.1347625, tmp)))|((tmp = 2637662639, tmp)<<x))));
+  assertEquals(0, x ^= x);
+  assertEquals(1237720303, x -= (-1237720303));
+  assertEquals(2, x >>= (-2148785379.428976));
+  assertEquals(2, x &= (tmp = -3087007874, tmp));
+  assertEquals(0, x %= x);
+  assertEquals(0, x >>>= x);
+  assertEquals(0, x >>>= x);
+  assertEquals(0, x += x);
+  assertEquals(0, x &= (2055693082));
+  assertEquals(-1349456492, x += (x^(-1349456492.315998)));
+  assertEquals(671088640, x <<= (x>>(-2030805724.5472062)));
+  assertEquals(-417654580004782100, x *= (tmp = -622353822, tmp));
+  assertEquals(1538160360, x |= (195983080.56698656));
+  assertEquals(733, x >>>= (tmp = 661085269, tmp));
+  assertEquals(657, x &= (-1611460943.993404));
+  assertEquals(431649, x *= x);
+  assertEquals(863298, x += x);
+  assertEquals(0, x &= ((1899423003)/((472439729)>>((tmp = 2903738952, tmp)+(tmp = 2164601630.3456993, tmp)))));
+  assertEquals(0, x &= (x>>>(tmp = 1939167951.2828958, tmp)));
+  assertEquals(1557813284, x |= (x-(-1557813284)));
+  assertEquals(72876068, x &= (662438974.2372154));
+  assertEquals(0.6695448637501589, x /= (tmp = 108844189.45702457, tmp));
+  assertEquals(0, x -= x);
+  assertEquals(2944889412, x += (2944889412));
+  assertEquals(3787980288, x -= ((((tmp = -2003814373.2301111, tmp)<<x)>>>(tmp = -3088357284.4405823, tmp))-(843090884)));
+  assertEquals(1, x >>>= (729274079));
+  assertEquals(1, x %= (-148002187.33869123));
+  assertEquals(3073988415.673201, x *= (tmp = 3073988415.673201, tmp));
+  assertEquals(4839166225.673201, x += (tmp = 1765177810, tmp));
+  assertEquals(4529373898.673201, x += (-309792327));
+  assertEquals(3097903.090496063, x %= (-150875866.51942348));
+  assertEquals(1270874112, x <<= ((((((tmp = -960966763.1418135, tmp)>>((((-3208596981.613482)>>>(tmp = 746403937.6913509, tmp))>>>(-2190042854.066803))/(2449323432)))*(-1272232665.791577))<<(-99306767.7209444))^((-1942103828)/((1570981655)/(tmp = 2381666337, tmp))))+(tmp = -1946759395.1558368, tmp)));
+  assertEquals(1273845956, x |= (tmp = -3197282108.6120167, tmp));
+  assertEquals(159230744, x >>= (((tmp = -1036031403.8108604, tmp)>>>(((3084964493)>>((x*x)^x))+(((2980108409.352001)^x)-(tmp = -2501685423.513927, tmp))))&(326263839)));
+  assertEquals(-370091747145550100, x *= (tmp = -2324248055.674161, tmp));
+  assertEquals(143384219.54999557, x /= (tmp = -2581119096, tmp));
+  assertEquals(1843396287, x |= (tmp = 1842718767, tmp));
+  assertEquals(2.4895593465813803, x /= (740450831));
+  assertEquals(2.4895593465813803, x %= ((((((((-3175333618)>>>((tmp = -1403880166, tmp)<<(tmp = -134875360, tmp)))>>>(2721317334.998084))<<(x&(tmp = 2924634208.1484184, tmp)))*((((x>>(tmp = -200319931.15328693, tmp))-(tmp = -495128933, tmp))+((-788052518.6610589)*((((tmp = 107902557, tmp)&(1221562660))%(x<<(((3155498059)*(((tmp = -1354381139.4897022, tmp)^(tmp = 3084557138.332852, tmp))*((((tmp = 1855251464.8464525, tmp)/((-1857403525.2008865)>>x))|x)-(-2061968455.0023944))))*(1917481864.84619))))^(x-(-508176709.52712965)))))+((((x%(-1942063404))+(x%(tmp = 855152281.180481, tmp)))|(-522863804))>>x)))>>>((tmp = -2515550553, tmp)&(((((-801095375)-(tmp = -2298729336.9792976, tmp))^x)/(tmp = 2370468053, tmp))>>(x|(tmp = -900008879, tmp)))))>>>(((tmp = -810295719.9509168, tmp)*((tmp = -1306212963.6226444, tmp)/(((tmp = 3175881540.9514832, tmp)|(-1439142297.819246))+((tmp = -134415617, tmp)|((-245801870)+x)))))>>(tmp = 1889815478, tmp)))-(((tmp = 597031177, tmp)%(858071823.7655672))+((tmp = 2320838665.8243756, tmp)|((938555608)<<(2351739219.6461897))))));
+  assertEquals(6.197905740150709, x *= x);
+  assertEquals(1, x /= x);
+  assertEquals(0, x >>= (-1639664165.9076233));
+  assertEquals(0, x >>= (-3135317748.801177));
+  assertEquals(0, x &= (3185479232.5325994));
+  assertEquals(-0, x *= ((-119759439.19668174)/(tmp = 2123964608, tmp)));
+  assertEquals(0, x /= (-1183061929.2827876));
+  assertEquals(0, x <<= (-1981831198));
+  assertEquals(0, x >>= ((((x<<(((((((-2133752838)&((tmp = -3045157736.9331336, tmp)>>>(x%x)))>>x)%(tmp = 3082217039, tmp))&(tmp = 270770770.97558427, tmp))|((-2212037556)^((((((2089224421)|(tmp = 360979560, tmp))<<x)%((tmp = -1679487690.6940534, tmp)+((173021423)|((tmp = 560900612, tmp)+((244376267.58977115)^x)))))<<(tmp = 2534513699, tmp))^x)))>>>(2915907189.4873834)))+(x*x))%(1637581117))%(tmp = 2363861105.3786244, tmp)));
+  assertEquals(0, x &= ((-2765495757.873004)&(1727406493)));
+  assertEquals(NaN, x -= (((((-1419667515.2616255)|x)-(150530256.48022234))%((((x|x)<<x)>>>(x^x))+x))-((-1216384577.3749187)*(495244398))));
+  assertEquals(NaN, x += (x^((tmp = 2472035493, tmp)+x)));
+  assertEquals(NaN, x %= ((tmp = -1753037412.885754, tmp)|((tmp = 2507058310, tmp)<<(1475945705))));
+  assertEquals(-1008981005, x |= ((tmp = -1140889842.6099494, tmp)-(tmp = -131908837, tmp)));
+  assertEquals(999230327.5872104, x -= (tmp = -2008211332.5872104, tmp));
+  assertEquals(975810, x >>= (((-1211913874)*x)>>>((-2842129009)>>(x&(tmp = -1410865834, tmp)))));
+  assertEquals(7623, x >>= ((tmp = -1051327071, tmp)-(((tmp = -237716102.8005445, tmp)|((2938903833.416546)&x))|(((-1831064579)^x)/((tmp = 2999232092, tmp)-(981996301.2875179))))));
+  assertEquals(0, x -= x);
+  assertEquals(0, x %= (x|(tmp = -666201160.5810485, tmp)));
+  assertEquals(-1347124100, x |= (-1347124100));
+  assertEquals(-0, x %= (x&x));
+  assertEquals(-661607963, x ^= (tmp = -661607963.3794863, tmp));
+  assertEquals(3465, x >>>= (-828119020.8056595));
+  assertEquals(-268431991, x -= (((tmp = -1386256352, tmp)^((tmp = 743629575, tmp)%((x*((tmp = -1719517658, tmp)>>(2019516558)))<<((2637317661)|x))))<<(tmp = -51637065, tmp)));
+  assertEquals(1578876380, x += ((tmp = 1847308371, tmp)&(((((((tmp = 1487934776.1893163, tmp)%(tmp = 1423264469.3137975, tmp))|(((2653260792.5668964)/(-2417905016.043802))>>>(2097411118.4501896)))^x)^(((tmp = -71334226, tmp)|x)>>>(tmp = -2771758874.7696714, tmp)))^((tmp = -1464849031.3240793, tmp)%(tmp = 2349739690.6430283, tmp)))/x)));
+  assertEquals(3269293934, x += (1690417554));
+  assertEquals(4025392608.031957, x -= (((tmp = 268501120.7225704, tmp)<<(tmp = 2841620654.8903794, tmp))+((tmp = 1606704462.8455591, tmp)/((-2601879963)/(tmp = 2966620168.989736, tmp)))));
+  assertEquals(7, x >>>= (x^(-1913800035)));
+  assertEquals(1.4326776816275493e-8, x /= ((((tmp = -2703417892, tmp)/x)^((-2693772270.396241)>>>((x-(tmp = 615999818.5666655, tmp))>>((((2308121439.3702726)<<((-1794701502)>>(x+(tmp = -2253406035.972883, tmp))))<<((tmp = -197103799.0624652, tmp)|(629975898)))>>>x))))>>>((tmp = 2833656803, tmp)^(x^(tmp = -1580436025, tmp)))));
+  assertEquals(0, x >>>= (tmp = 1525372830.2126007, tmp));
+  assertEquals(0, x %= ((2354010949.24469)>>>(x<<x)));
+  assertEquals(0, x ^= (((1112335059.6922574)*(tmp = -1874363935, tmp))&(((((2154894295.8360596)<<x)&(tmp = -270736315.13505507, tmp))&x)>>>(-2205692260.552064))));
+  assertEquals(0, x >>>= (x<<((1488533932)*(tmp = 1707754286, tmp))));
+  assertEquals(0, x >>= (((tmp = 1232547376.463387, tmp)%((x>>(711691823.1608362))>>>x))>>(((895039781.7478573)*(((((-334946524)&x)*(tmp = -1214529640, tmp))^(tmp = -1586820245, tmp))*(1062595445)))+x)));
+  assertEquals(0, x *= (1863299863.2631998));
+  assertEquals(0, x /= (tmp = 1858428705.1330547, tmp));
+  assertEquals(0, x &= x);
+  assertEquals(611788028, x += (x^(611788028.1510412)));
+  assertEquals(1, x /= x);
+  assertEquals(0, x >>= ((tmp = -1617320707.1784317, tmp)-((-2139400380)-(-1402777976))));
+  assertEquals(0, x >>= (415866827.34665));
+  assertEquals(-1990811897, x -= (tmp = 1990811897, tmp));
+  assertEquals(-1990811895, x += ((x>>>(tmp = -2175453282.769696, tmp))&(tmp = -1459450498.7327478, tmp)));
+  assertEquals(-2377017935.149517, x += (-386206040.1495173));
+  assertEquals(1946129845, x |= (tmp = -2890956796.936539, tmp));
+  assertEquals(0, x %= x);
+  assertEquals(0, x <<= (1616188263));
+  assertEquals(-1081213596, x ^= (tmp = 3213753700, tmp));
+  assertEquals(3213753700, x >>>= (tmp = -3211181312, tmp));
+  assertEquals(-1081213596, x &= x);
+  assertEquals(-1081213583, x ^= (((tmp = 1599988273.4926577, tmp)>>((((-1061394954.6331315)^x)+((-1835761078)*x))+(x%(tmp = -696221869, tmp))))/((tmp = -1156966790.3436491, tmp)^x)));
+  assertEquals(0, x ^= x);
+  assertEquals(NaN, x /= x);
+  assertEquals(NaN, x += (-1257400530.9263027));
+  assertEquals(NaN, x /= (753062089));
+  assertEquals(NaN, x *= ((tmp = 305418865.57012296, tmp)^(((-2797769706)+((((tmp = -33288276.988654375, tmp)%(tmp = 1242979846, tmp))|(-316574800))-((tmp = -1766083579.4203427, tmp)*(((x*(tmp = -2400342309.2349987, tmp))>>(tmp = 2632061795, tmp))^(tmp = -1001440809, tmp)))))^((((x-(tmp = -1469542637.6925495, tmp))-x)-(3184196890))%(((((((633226688)*((tmp = -2692547856, tmp)>>(((tmp = -1244311756, tmp)>>>x)+((1746013631.405202)>>>(941829464.1962085)))))%(x-x))+(995681795))-(tmp = -3047070551.3642616, tmp))/(1968259705))-((-2853237880)^(tmp = -2746628223.4540343, tmp)))))));
+  assertEquals(0, x >>= x);
+  assertEquals(0.5713172378854926, x += (((x+(((x+x)/(tmp = 2642822318, tmp))*(-2590095885.4280834)))|(tmp = -1769210836, tmp))/(tmp = -3096722308.8665104, tmp)));
+  assertEquals(-0.000002311097780334994, x /= ((2269858877.9010344)>>(-2992512915.984787)));
+  assertEquals(-0.000002311097780334994, x %= (-1139222821));
+  assertEquals(-0.000004622195560669988, x += x);
+  assertEquals(1, x /= x);
+  assertEquals(1, x >>>= (((3002169429.6061807)/(-3068577366))>>>((tmp = -1844537620, tmp)%((((tmp = 2087505119, tmp)>>>x)+x)&(2179989542)))));
+  assertEquals(-534213071, x *= (-534213071));
+  assertEquals(-534213077.3716287, x -= (((tmp = -2390432951.154034, tmp)^x)/(-290501980)));
+  assertEquals(1836305, x >>>= (x&x));
+  assertEquals(1836305, x %= ((x|((3070123855)^(49986396)))+((-1863644960.4202995)>>>((tmp = 1886126804.6019692, tmp)^x))));
+  assertEquals(28692, x >>>= ((2561362139.491764)>>(((((tmp = -1347469854.7413375, tmp)/(((x|(x+x))^((x^(tmp = -2737413775.4595394, tmp))^x))<<(((tmp = 225344844.07128417, tmp)&x)&(tmp = 145794498, tmp))))*x)<<(1424529187))/((-2924344715)/(tmp = -2125770148, tmp)))));
+  assertEquals(-2089419535.2717648, x += (-2089448227.2717648));
+  assertEquals(18957929, x ^= (tmp = 2186590872, tmp));
+  assertEquals(-708972800, x -= (727930729));
+  assertEquals(-4198593, x |= (799483455.1885371));
+  assertEquals(-1, x >>= (-2330654693.6413193));
+  assertEquals(-1, x |= (((tmp = -116877155, tmp)>>>((((tmp = -1677422314.1333556, tmp)/(tmp = -3108738499.0798397, tmp))%((x&(x/x))%((tmp = -695607185.1561592, tmp)-(tmp = 2302449181.622259, tmp))))^(((-1482743646.5604773)^((897705064)>>>x))-(tmp = -2933836669, tmp))))%(((tmp = -2991584625, tmp)|(((x>>x)+(-1101066835))-x))>>(-33192973.819939613))));
+  assertEquals(-1, x &= x);
+  assertEquals(-524288, x <<= (-1177513101.3087924));
+  assertEquals(1978770334.9189441, x += (tmp = 1979294622.9189441, tmp));
+  assertEquals(901783582, x &= ((-368584615)^(((((-478030699.2647903)<<x)<<x)+(tmp = 708725752, tmp))^((tmp = -3081556856, tmp)/(tmp = 1149958711.0676727, tmp)))));
+  assertEquals(-1480333211.8654308, x += (tmp = -2382116793.865431, tmp));
+  assertEquals(956930239.6783283, x *= ((tmp = 956930239.6783283, tmp)/x));
+  assertEquals(1277610.4668602513, x /= ((tmp = 1571029828, tmp)>>(tmp = 2417481141, tmp)));
+  assertEquals(-1077333228, x ^= (tmp = 3218755006, tmp));
+  assertEquals(-50218, x |= (tmp = -1044436526.6435988, tmp));
+  assertEquals(-1, x >>= (-154655245.18921852));
+  assertEquals(0.00006276207290978003, x *= (((tmp = 2234286992.9800305, tmp)>>(tmp = 2132564046.0696363, tmp))/((((tmp = -2565534644.3428087, tmp)>>>(tmp = 2622809851.043325, tmp))>>>((tmp = 311277386, tmp)&x))-(tmp = -2003980974, tmp))));
+  assertEquals(0, x %= x);
+  assertEquals(1282114076, x += ((((422838227)>>>((tmp = 1024613366.1899053, tmp)-((368275340)<<(((tmp = -3066121318, tmp)+(-2319101378))&x))))^(x>>(tmp = 1920136319.803412, tmp)))^(1282264803.3968434)));
+  assertEquals(-277097604, x |= (-283585688.9123297));
+  assertEquals(553816692, x &= (x&(tmp = 554082036.676608, tmp)));
+  assertEquals(658505728, x <<= x);
+  assertEquals(658505728, x &= (x%(2846071230)));
+  assertEquals(39, x >>= (334728536.5172192));
+  assertEquals(0, x -= x);
+  assertEquals(0, x += x);
+  assertEquals(0, x &= (tmp = -335285336, tmp));
+  assertEquals(0, x <<= (tmp = 1255594828.3430014, tmp));
+  assertEquals(0, x %= (-630772751.1248167));
+  assertEquals(NaN, x /= ((((x&(tmp = -1576090612, tmp))%x)>>>x)*((-1038073094.2787619)>>>x)));
+  assertEquals(NaN, x += x);
+  assertEquals(NaN, x -= (((tmp = -2663887803, tmp)&((x+(-1402421046))/x))/(-2675654483)));
+  assertEquals(NaN, x %= (x&(tmp = 672002093, tmp)));
+  assertEquals(0, x |= x);
+  assertEquals(-2698925754, x += (tmp = -2698925754, tmp));
+  assertEquals(-2057748993, x += ((tmp = -2263466497, tmp)^x));
+  assertEquals(1, x /= x);
+  assertEquals(-2769559719.4045835, x -= (2769559720.4045835));
+  assertEquals(-1.3964174646069973, x /= (tmp = 1983332198, tmp));
+  assertEquals(-2140716624.3964174, x += (tmp = -2140716623, tmp));
+  assertEquals(0, x <<= ((2589073007)-(-816764911.8571186)));
+  assertEquals(-2837097288.161354, x -= (tmp = 2837097288.161354, tmp));
+  assertEquals(-1445059927.161354, x += (tmp = 1392037361, tmp));
+  assertEquals(155197984, x &= (tmp = -2694712730.924674, tmp));
+  assertEquals(155197984, x |= (x>>>(tmp = 69118015.20305443, tmp)));
+  assertEquals(155197984, x >>>= (((x^(-1353660241))*x)<<(((((x%(tmp = -1905584634, tmp))>>>(tmp = -860171244.5963638, tmp))&(-1084415001.7039547))+(x-(((tmp = 298064661, tmp)>>x)>>((tmp = 378629912.383446, tmp)-(x%x)))))+(((3212580683)/(((((x^x)>>(tmp = -1502887218, tmp))<<x)%(-142779025))|(((tmp = 1361745708, tmp)*(((((tmp = 1797072528.0673332, tmp)+x)%(tmp = 167297609, tmp))%(-287345856.1791787))^(((((((x*(tmp = -640510459.1514752, tmp))<<(x^(tmp = 1387982082.5646644, tmp)))>>(tmp = 2473373497.467914, tmp))^((234025940)*x))+(tmp = 520098202.9546956, tmp))*(x*(tmp = -362929250.1775775, tmp)))^(-2379972900))))*(tmp = -1385817972, tmp))))+(-1788631834)))));
+  assertEquals(0, x >>= ((tmp = -18671049, tmp)/((tmp = 651261550.6716013, tmp)>>(-58105114.70740628))));
+  assertEquals(0, x *= ((((x>>(tmp = 2256492150.737681, tmp))<<(x<<(((-2738910707)&x)<<(1892428322))))*(tmp = 1547934638, tmp))>>((((319464033.7888391)|(((((tmp = 2705641070, tmp)<<((tmp = 1566904759.36666, tmp)*((-682175559.7540412)&(-691692016.3021002))))%(tmp = 1118101737, tmp))|(902774462))<<x))^((tmp = -388997180, tmp)<<(x<<((((((-88462733)+(x>>>x))%x)*(tmp = -20297481.556210756, tmp))>>>(1927423855.1719701))-((2047811185.6278129)-(tmp = 2952219346.72126, tmp))))))|(-1685518403.7513878))));
+  assertEquals(0, x /= (tmp = 1858074757.563318, tmp));
+  assertEquals(-1351623058, x ^= (-1351623058.4756806));
+  assertEquals(1, x /= x);
+  assertEquals(0, x ^= x);
+  assertEquals(0, x -= (x&(997878144.9798675)));
+  assertEquals(-0, x /= (-2769731277));
+  assertEquals(0, x >>>= ((-2598508325)>>(-1355571351)));
+  assertEquals(0, x >>>= x);
+  assertEquals(0, x -= (x&(tmp = 1672810223, tmp)));
+  assertEquals(-924449908.1999881, x -= (924449908.1999881));
+  assertEquals(-0, x %= x);
+  assertEquals(-0, x /= (tmp = 2007131382.059545, tmp));
+  assertEquals(-0, x += x);
+  assertEquals(225132064, x += ((((tmp = -2422670578.1260514, tmp)|x)+x)^(1660142894.7066057)));
+  assertEquals(Infinity, x /= (x-x));
+  assertEquals(0, x ^= x);
+  assertEquals(0, x <<= x);
+  assertEquals(-2455424946.732606, x -= (2455424946.732606));
+  assertEquals(1208029258, x &= ((tmp = 1823728509, tmp)+x));
+  assertEquals(1.3682499724725645, x /= ((((tmp = 1267938464.3854322, tmp)%((tmp = 2510853574, tmp)+(((2979355693.866435)-(tmp = 1989726095.7746763, tmp))<<x)))%((-1382092141.1627176)+(((-901799353)+((-2936414080.8254457)>>>(2515004943.0865674)))-(2532799222.353197))))<<(tmp = -2168058960.2694826, tmp)));
+  assertEquals(0.13799826710735907, x %= ((-1090423235)/(tmp = 2659024727, tmp)));
+  assertEquals(0, x >>= (1688542889.082693));
+  assertEquals(0, x <<= x);
+  assertEquals(NaN, x %= ((((tmp = 1461037539, tmp)<<((x<<(tmp = 2101282906.5302017, tmp))>>(-2792197742)))%(((x%x)^(((tmp = 1399565526, tmp)^(tmp = 643902, tmp))-((tmp = -1449543738, tmp)|x)))/x))*(x<<(471967867))));
+  assertEquals(0, x &= ((tmp = -2121748100.6824129, tmp)>>(tmp = -2817271480.6497793, tmp)));
+  assertEquals(0, x &= (3169130964.6291866));
+  assertEquals(-0, x /= (-2303316806));
+  assertEquals(0, x <<= (tmp = 120185946.51617038, tmp));
+  assertEquals(449448375, x ^= ((((tmp = -836410266.014014, tmp)/x)&((x>>>(tmp = -2602671283, tmp))+x))+(tmp = 449448375, tmp)));
+  assertEquals(202003841790140640, x *= x);
+  assertEquals(202003840800829020, x += (((tmp = -1339865843, tmp)+(tmp = 350554234.15375435, tmp))<<((((((tmp = -1798499687.8208885, tmp)>>(((x-(x^x))|((tmp = 463627396.23932934, tmp)/(2714928060)))&(tmp = 3048222568.1103754, tmp)))&(-3127578553))<<(tmp = -2569797028.8299003, tmp))&x)<<((tmp = 2104393646, tmp)/((tmp = 2314471015.742891, tmp)<<((2704090554.1746845)>>(((tmp = 1935999696, tmp)*(((1348554815)>>>x)>>>(146665093.82445252)))%x)))))));
+  assertEquals(202003841764125400, x -= (tmp = -963296372.2846234, tmp));
+  assertEquals(-413485056, x <<= (tmp = -2474480506.6054573, tmp));
+  assertEquals(-3171894580.186845, x += ((tmp = -1261111102, tmp)+(tmp = -1497298422.1868448, tmp)));
+  assertEquals(17136, x >>= (tmp = 3055058160, tmp));
+  assertEquals(17136, x %= (tmp = 1706784063.3577294, tmp));
+  assertEquals(17136, x >>= ((tmp = 2161213808, tmp)*x));
+  assertEquals(-17136, x /= ((((tmp = -1492618154, tmp)>>x)|(1381949066))>>(tmp = 2014457960, tmp)));
+  assertEquals(-34272, x += x);
+  assertEquals(-1498690902, x += (-1498656630));
+  assertEquals(-1168674482, x ^= (486325220));
+  assertEquals(-1168674482, x <<= ((x^x)*x));
+  assertEquals(794521557347068000, x *= (-679848469));
+  assertEquals(1.3330392590424505e+26, x *= (tmp = 167778866, tmp));
+  assertEquals(0, x <<= (tmp = -2501540637.3664584, tmp));
+  assertEquals(0, x >>>= (x-(x*(-890638026.1825848))));
+  assertEquals(0, x %= ((-285010538.2813468)&(1314684460.7634423)));
+  assertEquals(0, x -= x);
+  assertEquals(0, x *= x);
+  assertEquals(NaN, x %= (x*(x<<x)));
+  assertEquals(NaN, x %= (x<<(((tmp = -1763171810.601149, tmp)&(-138151449.18303752))^(x|x))));
+  assertEquals(0, x |= (x>>x));
+  assertEquals(0, x &= (tmp = 1107152048, tmp));
+  assertEquals(0, x >>= (1489117056.8200984));
+  assertEquals(518749976, x ^= (518749976.20107937));
+  assertEquals(356718654, x += (tmp = -162031322, tmp));
+  assertEquals(356718654, x %= (((x>>>((tmp = -373747439.09634733, tmp)*(tmp = 563665566, tmp)))*(tmp = 2853322586.588251, tmp))*((1303537213)%(-2995314284))));
+  assertEquals(5573728, x >>= (tmp = -2095997978, tmp));
+  assertEquals(5573728, x <<= x);
+  assertEquals(5573728, x >>= (((((tmp = 1745399178.334154, tmp)<<(tmp = 2647999783.8219824, tmp))^(tmp = 1571286759, tmp))%x)/(2166250345.181711)));
+  assertEquals(10886, x >>>= ((682837289)+(x*x)));
+  assertEquals(170, x >>>= x);
+  assertEquals(169.95167497151652, x -= (((tmp = 527356024.19706845, tmp)+((tmp = 1263164619.2954736, tmp)|(tmp = 2942471886, tmp)))/((3017909419.131321)+(tmp = 2137746252.8006272, tmp))));
+  assertEquals(-1915170061, x ^= (tmp = -1915170214, tmp));
+  assertEquals(206045792, x &= (((tmp = 887031922, tmp)>>>x)-((-1861922770)|(9633541))));
+  assertEquals(-1940321674, x |= (tmp = -2012149162.1817405, tmp));
+  assertEquals(-1940321674, x &= x);
+  assertEquals(1128412272.160699, x += (tmp = 3068733946.160699, tmp));
+  assertEquals(0.47486363523180236, x /= (tmp = 2376286976.807289, tmp));
+  assertEquals(-1.4931079540252477e-10, x /= (tmp = -3180370407.5892467, tmp));
+  assertEquals(0, x |= (((1220765170.5933602)*(884017786))*((x%(tmp = -2538196897.226384, tmp))<<(x^x))));
+  assertEquals(-525529894, x += (tmp = -525529894, tmp));
+  assertEquals(1621426184, x &= ((3046517714)*(((((-162481040.8033898)+(x/((x&(1489724492))/((x|(tmp = 943542303, tmp))>>>((-1840491388.1365871)<<(2338177232))))))+(((-2268887573.2430763)>>>(((tmp = 2919141667, tmp)+((tmp = 1326295559.692003, tmp)<<(-2256653815)))>>>(((((tmp = 1602731976.7514615, tmp)*(856036244.3730336))^x)>>>((((2846316421.252943)&(915324162))%(tmp = 1144577211.0221815, tmp))%x))*(x*x))))%(tmp = -2641416560, tmp)))*(x+(x>>>x)))>>x)));
+  assertEquals(1621426184, x %= (tmp = 1898223948, tmp));
+  assertEquals(-3.383396676504762, x /= ((tmp = 2211088034.5234556, tmp)^x));
+  assertEquals(7120923705.122882, x *= (((((tmp = 2632382342.914504, tmp)/(-615440284.1762738))&(2162453853.6658797))<<(-849038082.5298986))|(tmp = -2104667110.5603983, tmp)));
+  assertEquals(-1469010887, x &= x);
+  assertEquals(850767635866964700, x *= (tmp = -579143179.5338116, tmp));
+  assertEquals(0, x %= x);
+  assertEquals(-571457, x |= ((2849326490.8464212)|(tmp = 1450592063, tmp)));
+  assertEquals(-571457, x &= x);
+  assertEquals(-0.00018638416434019244, x /= (3066016912.021368));
+  assertEquals(0, x <<= (2058262829));
+  assertEquals(NaN, x %= ((x|((x%x)>>>x))%((tmp = -2970314895.6974382, tmp)+x)));
+  assertEquals(NaN, x *= (-698693934.9483855));
+  assertEquals(NaN, x += (-100150720.64391875));
+  assertEquals(NaN, x %= x);
+  assertEquals(NaN, x -= (-530301478));
+  assertEquals(NaN, x /= (1507673244));
+  assertEquals(0, x <<= (x%(tmp = 2977838420.857235, tmp)));
+  assertEquals(0, x <<= (tmp = 3200877763, tmp));
+  assertEquals(0, x <<= (tmp = -2592127060, tmp));
+  assertEquals(NaN, x -= (((((((1930632619)*(3018666359))<<((tmp = 2676511886, tmp)&(-2786714482.25468)))%x)-(-633193192))<<((tmp = 403293598, tmp)*(-2765170226)))%x));
+  assertEquals(530062092, x |= (tmp = 530062092, tmp));
+  assertEquals(129409, x >>>= x);
+  assertEquals(-152430382316341.78, x *= (-1177896300.229055));
+  assertEquals(-304860764632683.56, x += x);
+  assertEquals(0, x ^= x);
+  assertEquals(0, x %= (tmp = -63071565.367660046, tmp));
+  assertEquals(0, x &= ((((tmp = -1007464338, tmp)<<(x<<((x^(tmp = -726826835, tmp))|x)))>>>x)*(((tmp = 469293335.9161849, tmp)<<(((((tmp = 1035077379, tmp)*(tmp = -555174353.7567515, tmp))&(3109222796.8286266))-(((((x-(tmp = 1128900353.6650414, tmp))|(tmp = 3119921303, tmp))&((-1353827690)&(x%((-924615958)&x))))>>>x)+(tmp = 1167787910, tmp)))+x))%((605363594)>>(1784370958.269381)))));
+  assertEquals(0, x %= (2953812835.9781704));
+  assertEquals(0, x -= x);
+  assertEquals(0, x <<= x);
+  assertEquals(-901209266, x += (-901209266));
+  assertEquals(-901209266, x &= x);
+  assertEquals(404, x >>>= (-3195686249));
+  assertEquals(824237108, x ^= (824237472));
+  assertEquals(497790936.1853996, x /= ((tmp = 1253776028, tmp)/(757207285)));
+  assertEquals(497790936, x >>>= ((tmp = -2212598336, tmp)<<(x^(1335355792.9363852))));
+  assertEquals(0, x %= x);
+  assertEquals(-2659887352.6415873, x += (tmp = -2659887352.6415873, tmp));
+  assertEquals(1635079945, x |= ((x&(1234659380))>>((((tmp = 2694276886.979136, tmp)|x)^((tmp = 132795582, tmp)<<((-1089828902)>>>x)))<<((((tmp = -2098728613.0310376, tmp)<<(x/(tmp = -2253865599, tmp)))*((x+(x>>>((48633053.82579231)-(385301592))))*(tmp = -1847454853.333535, tmp)))/((-540428068.8583717)+x)))));
+  assertEquals(1, x /= x);
+  assertEquals(33554432, x <<= ((((2803140769)<<x)|(tmp = -1965793804, tmp))>>>(tmp = -2273336965.575082, tmp)));
+  assertEquals(67108864, x += x);
+  assertEquals(9007199254740992, x *= (x+((x>>x)%(2674760854))));
+  assertEquals(55369784, x %= (x|(-170725544.20038843)));
+  assertEquals(55369784, x %= (-1186186787));
+  assertEquals(0, x ^= x);
+  assertEquals(0, x <<= x);
+  assertEquals(NaN, x /= ((-2968110098)-((x/(x|(((((x|((x&((-130329882)>>>(((-135670650)|(x<<(tmp = 1280371822, tmp)))^x)))-(-1183024707.2230911)))&(-1072829280))>>>(-340696948.41492534))>>>(tmp = 436308526.4938295, tmp))<<(((tmp = 3113787500, tmp)*((2038309320)>>>(-1818917055)))&((2808000707)/(774731251))))))%x)));
+  assertEquals(0, x |= (x*(tmp = -843074864, tmp)));
+  assertEquals(0, x &= (tmp = -752261173.8090212, tmp));
+  assertEquals(0, x >>>= (tmp = 1532349931.7517128, tmp));
+  assertEquals(0, x <<= ((tmp = -8628768, tmp)-((((tmp = 225928543, tmp)%(x>>>(x+x)))^((tmp = -2051536806.5249376, tmp)-x))-((tmp = -2274310376.9964137, tmp)%(tmp = 2251342739, tmp)))));
+  assertEquals(0, x >>= (1011388449));
+  assertEquals(0, x += x);
+  assertEquals(0, x >>>= x);
+  assertEquals(-0, x *= ((-1781234179.8663826)>>(((1514201119.9761915)>>(((((1174857164.90042)^(tmp = 1124973934, tmp))^x)+((-1059246013.8834443)<<(2997611138.4876065)))%(((798188010)*(-1428293122))>>>(tmp = -3087267036.8035297, tmp))))<<x)));
+  assertEquals(1752554372, x ^= (tmp = -2542412924, tmp));
+  assertEquals(1752554372, x %= (tmp = 3037553410.2298307, tmp));
+  assertEquals(1859383977, x -= (x^(2446603103)));
+  assertEquals(1183048193, x &= ((tmp = -962336957, tmp)/(x/x)));
+  assertEquals(67738157, x %= ((((tmp = -1813911745.5223546, tmp)+x)<<(x-(((-1980179168)^x)|x)))|(1913769561.1308007)));
+  assertEquals(67698724, x &= ((1801574998.3142045)*((tmp = -2057492249, tmp)/((1713854494.72282)>>x))));
+  assertEquals(0, x -= x);
+  assertEquals(-25232836, x -= ((tmp = 25232836, tmp)|x));
+  assertEquals(-49, x >>= (x+((tmp = 2201204630.2897243, tmp)|(-1929326509))));
+  assertEquals(-1605632, x <<= x);
+  assertEquals(-165965313, x += (tmp = -164359681, tmp));
+  assertEquals(9.220413724941365e-10, x /= (((((tmp = 2579760013.0808706, tmp)*(tmp = -2535370639.9805303, tmp))>>((tmp = 2138199747.0301933, tmp)-(tmp = -2698019325.0972376, tmp)))*(tmp = -425284716, tmp))/((-1951538149.6611228)/(x^(2632919130)))));
+  assertEquals(0, x &= x);
+  assertEquals(0, x &= ((-645189137)/(tmp = 800952748, tmp)));
+  assertEquals(0, x &= (tmp = -1773606925, tmp));
+  assertEquals(0, x += x);
+  assertEquals(0, x >>>= (tmp = 211399355.0741787, tmp));
+  assertEquals(0, x <<= ((-1317040231.5737965)/((((((tmp = 838897586.0147077, tmp)|((-1902447594)|(tmp = 404942728.83034873, tmp)))^(2462760692.2907705))%((((((x%(tmp = -2888980287, tmp))<<(-368505224.49609876))-((x>>>(532513369))&(((((((tmp = -1298067543, tmp)^(tmp = -3130435881.100909, tmp))>>x)/(tmp = -3041161992, tmp))>>(x|(-431685991.95776653)))^((tmp = 1031777777, tmp)^((-105610810)>>>((-631433779)>>(tmp = -2577780871.167671, tmp)))))%(tmp = -3170517650.088039, tmp))))-(((tmp = 2175146237.968785, tmp)-((384631158.50508535)>>((893912279.4646157)|(tmp = -1478803924.5338967, tmp))))%(x/(-1089156420))))<<(tmp = -2024709456, tmp))>>x))*(tmp = -1423824994.6993582, tmp))%(tmp = 1739143409, tmp))));
+  assertEquals(-1799353648, x |= ((-1799353648.3589036)>>>((((x&(-923571640.1012449))%x)+((tmp = 971885508, tmp)>>((tmp = -2207464428.2123804, tmp)+(-3108177894.0459776))))-(-2048954486.7014258))));
+  assertEquals(-3666808032.2958965, x -= (tmp = 1867454384.2958965, tmp));
+  assertEquals(-260069478915415100, x *= (tmp = 70925305.23136711, tmp));
+  assertEquals(1142096768, x &= (tmp = 1866401706.9144325, tmp));
+  assertEquals(1, x >>>= (tmp = 2701377150.5717473, tmp));
+  assertEquals(1865946805, x |= (tmp = -2429020492, tmp));
+  assertEquals(1424222287, x ^= ((((tmp = 433781338, tmp)>>(x>>>((-2914418422.4829016)/(tmp = 1600920669, tmp))))|(tmp = 588320482.9566053, tmp))>>>((((((x+(tmp = -2556387365.5071325, tmp))+(tmp = -2381889946.1830974, tmp))/(3154278191))>>>(-1069701268.8022757))>>(((tmp = 182049089.28866422, tmp)>>x)>>>(tmp = -447146173, tmp)))/(x-(2103883357.0929923)))));
+  assertEquals(0, x ^= x);
+  assertEquals(0, x -= (x%(3036884806)));
+  assertEquals(0, x >>>= (tmp = -652793480.3870945, tmp));
+  assertEquals(0, x += x);
+  assertEquals(304031003, x ^= ((tmp = -900156495, tmp)^(-666397014.0711515)));
+  assertEquals(1, x /= x);
+  assertEquals(-1974501681, x |= (x^(-1974501681.4628205)));
+  assertEquals(-1.3089278317616264, x /= (((-1723703186.962839)>>>x)|((2061022161.6239533)<<x)));
+  assertEquals(-1, x |= (tmp = -1987006457, tmp));
+  assertEquals(-0.14285714285714285, x /= ((((((x|(-1767793799.7595732))-(-1391656680))<<x)|(x>>(tmp = -2301588485.2811003, tmp)))>>>(((tmp = 1812723993, tmp)>>>((x^(((tmp = -3154100157.951021, tmp)%((tmp = -1254955564.4553523, tmp)-(((x>>>(((-1762886343)*x)*x))*(x^(x*(-750918563.4387553))))*x)))|((x>>x)>>(x<<((((-1766797454.5634143)^(tmp = -2251474340, tmp))-(-787637516.5276759))<<((1390653368)^(-1937605249.245374)))))))|(((tmp = 1156611894, tmp)<<x)<<(x>>((((x+(tmp = 2170166060.881797, tmp))&(x>>>(tmp = -1749295923.1498983, tmp)))>>(((-1014973878)|x)&(1302866805.684057)))*(tmp = 560439074.4002491, tmp))))))|(-2758270803.4510045)))&x));
+  assertEquals(0, x |= x);
+  assertEquals(0, x += ((x>>((x+(tmp = -2776680860.870219, tmp))-(((688502468)<<(((tmp = 475364260.57888806, tmp)<<x)+(329071671)))/(-1097134948))))*(tmp = -1281834214.3416953, tmp)));
+  assertEquals(0, x *= ((((1159762330)<<(tmp = -1892429200, tmp))%x)<<x));
+  assertEquals(0, x >>>= (-770595225));
+  assertEquals(NaN, x += (((x>>x)/(tmp = 281621135, tmp))/x));
+  assertEquals(0, x >>= (1363890241));
+  assertEquals(1639023942.9945002, x += (1639023942.9945002));
+  assertEquals(-2568590958567747000, x *= (-1567146697));
+  assertEquals(1793554700, x ^= (tmp = 3215813388.405799, tmp));
+  assertEquals(437879, x >>= x);
+  assertEquals(1339485943, x |= (1339220210));
+  assertEquals(1, x /= x);
+  assertEquals(512, x <<= (2509226729.1477118));
+  assertEquals(512, x <<= ((x>>(1326274040.7181284))<<(tmp = -760670199, tmp)));
+  assertEquals(1, x /= (x<<(x^x)));
+  assertEquals(0, x >>>= (((((1382512625.8298302)&(x>>>x))*(tmp = -815316595, tmp))>>>x)-(-95538051)));
+  assertEquals(-544344229.3548596, x -= (tmp = 544344229.3548596, tmp));
+  assertEquals(-1088688458.7097192, x += x);
+  assertEquals(-1022850479579041900, x *= (939525418.3104812));
+  assertEquals(2069622661, x |= (-2632744187.7721186));
+  assertEquals(-1353480538017756400, x -= ((tmp = 1308085980, tmp)*((x>>>(-629663391.5165792))&(tmp = 3182319856.674114, tmp))));
+  assertEquals(1.3702811563654176e+27, x *= ((((3061414617.6321163)/(tmp = 2628865442, tmp))+(-1549548261))+(x&((tmp = 809684398, tmp)|(x^(tmp = 801765002, tmp))))));
+  assertEquals(0, x >>>= ((-2988504159)&((tmp = -260444190.02252054, tmp)^(2178729442.260293))));
+  assertEquals(-1518607002, x -= (tmp = 1518607002, tmp));
+  assertEquals(724566016, x <<= (tmp = 1042915731.7055794, tmp));
+  assertEquals(707584, x >>>= (-208959862.93305588));
+  assertEquals(0, x >>>= (((tmp = 877181764, tmp)>>(-970697753.3318911))%x));
+  assertEquals(0, x ^= x);
+  assertEquals(0, x += x);
+  assertEquals(0, x <<= x);
+  assertEquals(0, x /= (x^((x/(-2903618412.4936123))+(tmp = 1169288899, tmp))));
+  assertEquals(0, x >>>= x);
+  assertEquals(-1302645245, x ^= ((1855892732.3544865)+(tmp = 1136429319.5633948, tmp)));
+  assertEquals(0, x ^= x);
+  assertEquals(0, x &= (-1384534597.409375));
+  assertEquals(-0, x /= (tmp = -680466419.8289509, tmp));
+  assertEquals(-0, x *= (318728599.95017374));
+  assertEquals(NaN, x %= (x>>(2019695267)));
+  assertEquals(0, x >>= (tmp = 1280789995, tmp));
+  assertEquals(0, x *= (tmp = 2336951458, tmp));
+  assertEquals(0, x >>= ((2981466013.758637)%(731947033)));
+  assertEquals(0, x -= x);
+  assertEquals(0, x ^= x);
+  assertEquals(0, x /= ((((3068070149.1452317)>>x)%(((1448965452)*((tmp = -2961594129, tmp)+(1829082104.0681171)))>>(-2331499703)))>>>(tmp = -3206314941.2626476, tmp)));
+  assertEquals(0, x >>= (x%(1869217101.9823673)));
+  assertEquals(0, x <<= (x+x));
+  assertEquals(0, x >>>= ((1202130282)>>>x));
+  assertEquals(0, x += x);
+  assertEquals(2603245248.6273212, x += (tmp = 2603245248.6273212, tmp));
+  assertEquals(-1691864471, x ^= (x>>>(2504513614.117516)));
+  assertEquals(136835305, x -= ((-1618979896)&(-746953306)));
+  assertEquals(-2568499564.1261334, x += (tmp = -2705334869.1261334, tmp));
+  assertEquals(1038075700, x ^= (1530399136));
+  assertEquals(2076151400, x += x);
+  assertEquals(-524018410.1751909, x -= ((2398973627.175191)-(-201196183)));
+  assertEquals(0.327110599608614, x /= ((3181340288.602796)&x));
+  assertEquals(0.327110599608614, x %= (tmp = -2284484060, tmp));
+  assertEquals(0, x |= x);
+  assertEquals(403217947.5779772, x += (tmp = 403217947.5779772, tmp));
+  assertEquals(403217947, x |= x);
+  assertEquals(-Infinity, x *= ((58693583.845808744)+(((tmp = -1527787016, tmp)*x)/((((2532689893.3191843)/(tmp = 2781746479.850424, tmp))|(((((460850355.9211761)/((((tmp = 626683450, tmp)<<((tmp = 1349974710, tmp)-((tmp = -1349602292, tmp)/(-2199808871.1229663))))>>((x/(-3092436372.3078623))&(tmp = -1190631012.0323825, tmp)))^((-2907082828.4552956)-(tmp = 1858683340.1157017, tmp))))^(-1513755598.5398848))%x)/x))&(1147739260.136806)))));
+  assertEquals(0, x &= (tmp = -3047356844.109563, tmp));
+  assertEquals(637934616, x -= (tmp = -637934616, tmp));
+  assertEquals(-1553350083, x ^= (-2056266203.094929));
+  assertEquals(-0.13467351026547192, x %= ((tmp = 824736251, tmp)/(2544186314)));
+  assertEquals(1, x /= x);
+  assertEquals(1, x |= x);
+  assertEquals(0, x >>>= (2166609431.9515543));
+  assertEquals(0, x <<= (x|(tmp = 121899222.14603412, tmp)));
+  assertEquals(0, x *= (1300447849.6595674));
+  assertEquals(0, x %= (tmp = -2360500865.3944597, tmp));
+  assertEquals(0, x %= (tmp = -1693401247, tmp));
+  assertEquals(0, x >>= x);
+  assertEquals(0, x /= (471265307));
+  assertEquals(257349748, x ^= (257349748.689448));
+  assertEquals(257349748, x &= x);
+  assertEquals(981, x >>>= (tmp = -1959001422, tmp));
+  assertEquals(0, x >>= ((-79932778.18114972)/x));
+  assertEquals(0, x <<= (((-2599621472)^(tmp = 662071103, tmp))%(tmp = -2675822640.7641535, tmp)));
+  assertEquals(0, x &= (tmp = 2582354953.878623, tmp));
+  assertEquals(0, x /= ((-953254484)/((-2571632163.376176)-(tmp = -342034471, tmp))));
+  assertEquals(0, x <<= ((x-(tmp = -3013057672, tmp))&(tmp = -3204761036, tmp)));
+  assertEquals(0, x ^= ((x&((515934453)>>>x))/x));
+  assertEquals(1, x |= ((-1914707646.2075093)>>>(tmp = -1918045025, tmp)));
+  assertEquals(-2002844120.8792589, x += (tmp = -2002844121.8792589, tmp));
+  assertEquals(573030794, x >>>= (tmp = 1707788162, tmp));
+  assertEquals(1.917619109627369, x /= ((1909436830.484202)%((123114323)<<(tmp = -1288988388.6444468, tmp))));
+  assertEquals(-1400358045, x |= (-1400358046));
+  assertEquals(-2043022529.4273133, x += (tmp = -642664484.4273133, tmp));
+  assertEquals(-81408068.86728716, x %= (tmp = -980807230.2800131, tmp));
+  assertEquals(0.1436896445024992, x /= (((tmp = 3201789924.913518, tmp)%(tmp = -962242528.6008646, tmp))^((tmp = -338830119.55884504, tmp)*(tmp = -916120166, tmp))));
+  assertEquals(0.1436896445024992, x %= (tmp = 2598469263, tmp));
+  assertEquals(0, x *= (x-x));
+  assertEquals(-1409286144, x += (((-111514798.64745283)|(2372059654))<<(tmp = 175644313, tmp)));
+  assertEquals(-2393905467.0073113, x += (-984619323.0073113));
+  assertEquals(-835111172.0073113, x %= (x^(-765900532.5585573)));
+  assertEquals(-835111172.0073113, x %= (tmp = -946478116, tmp));
+  assertEquals(-100, x >>= ((-1020515908)>>(((x&((x^(169474253.53811646))>>(-221739002)))+x)*((201939882.92880356)/(tmp = -50402570, tmp)))));
+  assertEquals(2131506964, x &= (tmp = -2163460268, tmp));
+  assertEquals(1074275840, x &= ((-1561930379.8719592)*(tmp = -2871750052.876917, tmp)));
+  assertEquals(-954232605.5377102, x -= (tmp = 2028508445.5377102, tmp));
+  assertEquals(-29, x >>= (-279577351.87217045));
+  assertEquals(-232, x <<= x);
+  assertEquals(-70, x |= (215185578));
+  assertEquals(-1, x >>= (x>>(-1691303095)));
+  assertEquals(1, x /= x);
+  assertEquals(3149465364.2236686, x *= (3149465364.2236686));
+  assertEquals(3304787832.3790073, x += (tmp = 155322468.15533853, tmp));
+  assertEquals(100068712.23500109, x %= (tmp = 3204719120.1440063, tmp));
+  assertEquals(91628864, x &= (tmp = 629090241, tmp));
+  assertEquals(-113202292046379710, x *= (-1235443583));
+  assertEquals(122, x >>>= (tmp = 3196555256, tmp));
+  assertEquals(122, x >>>= (((2226535734)-x)^(2248399036.393125)));
+  assertEquals(6.904199169070746e-8, x /= (tmp = 1767040564.9149356, tmp));
+  assertEquals(-212687449.99999994, x += ((((2244322375)*(((2515994102)^x)>>x))<<(x-(-832407685.3251972)))^(2266670502)));
+  assertEquals(366515938514778750, x *= (tmp = -1723260768.3940866, tmp));
+  assertEquals(366515938514778750, x += ((-1643386193.9159095)/(tmp = 425161225.95316494, tmp)));
+  assertEquals(654872716.4123061, x /= ((-1377382984)-(tmp = -1937058061.811642, tmp)));
+  assertEquals(654872716, x &= x);
+  assertEquals(-86260926.17813063, x -= (tmp = 741133642.1781306, tmp));
+  assertEquals(1052176592, x >>>= x);
+  assertEquals(2020882856, x ^= (-3107796616));
+  assertEquals(0, x <<= ((606939871.9812952)|(tmp = -3127138319.1557302, tmp)));
+  assertEquals(NaN, x -= ((x%((1120711400.2242608)%x))*(tmp = -930171286.7999947, tmp)));
+  assertEquals(NaN, x %= (3215044180));
+  assertEquals(NaN, x %= (tmp = 2882893804.20102, tmp));
+  assertEquals(NaN, x %= ((217170359.5778643)^x));
+  assertEquals(0, x &= ((-1095125960.9903677)>>(x^(-2227981276))));
+  assertEquals(-748549860, x += (-748549860));
+  assertEquals(1816208256, x <<= (-610872411.3826082));
+  assertEquals(201400576, x &= (((tmp = 1910394603.4836266, tmp)<<x)^x));
+  assertEquals(0, x %= x);
+  assertEquals(NaN, x %= x);
+  assertEquals(0, x <<= (((((2670901339.6696005)%(2180020861))*((2134469504)/(2237096063.0680027)))*((tmp = 1203829756, tmp)>>((765467065)+(x|(2673651811.9494815)))))<<((-1463378514)|(((x/(tmp = -1075050081, tmp))-((-879974865)+x))>>>(tmp = 2172883926, tmp)))));
+  assertEquals(433013198, x ^= (433013198.2833413));
+  assertEquals(0, x >>= ((((-2404431196)%(x%(tmp = 1443152875.8809233, tmp)))&(x|((1414364997.0517852)/((tmp = -435854369, tmp)+(tmp = 2737625141, tmp)))))|(((tmp = 2241746562.2197237, tmp)^(tmp = -1606928010.1992552, tmp))|((tmp = -3083227418.686173, tmp)>>(tmp = -2717460410, tmp)))));
+  assertEquals(0, x >>= x);
+  assertEquals(0, x *= ((tmp = 2302521322, tmp)>>>(((((((tmp = 344089066.9725498, tmp)%(tmp = 1765830559, tmp))-x)|x)^(((-2450263325)/(tmp = 371928405.17475057, tmp))>>>(1330100413.7731652)))^(((173024329)%(tmp = -2927276187, tmp))+(x>>>(-1042229940.308507))))|(((((tmp = 379074096, tmp)+((142762508)-((-2773070834.526266)-(x&((tmp = 57957493, tmp)<<(2189553500))))))+((36991093)+(tmp = 339487168.58069587, tmp)))*(-1257565451))&(tmp = 645233114, tmp)))));
+  assertEquals(-2644503151.1185284, x += (-2644503151.1185284));
+  assertEquals(-5289006302.237057, x += x);
+  assertEquals(-4008773824.2370567, x -= (tmp = -1280232478, tmp));
+  assertEquals(1975449413, x |= ((tmp = 1957832005.4285066, tmp)>>((1681236712.9715524)&(-675823978))));
+  assertEquals(-146472960, x <<= (-648510672.5644083));
+  assertEquals(-3, x |= (((((x>>>(tmp = 2271744104, tmp))+(tmp = -210058133.30147195, tmp))+(tmp = -2827493425, tmp))/(tmp = 765962538, tmp))%(tmp = 1048631551, tmp)));
+  assertEquals(1, x /= x);
+  assertEquals(0, x >>= (1070524782.5154183));
+  assertEquals(0, x <<= (462502504));
+  assertEquals(0, x %= (540589670.0730014));
+  assertEquals(NaN, x %= x);
+  assertEquals(NaN, x /= ((-1268640098)%x));
+  assertEquals(NaN, x %= (1741157613.744652));
+  assertEquals(NaN, x += x);
+  assertEquals(NaN, x %= ((x|(tmp = 1992323492.7000637, tmp))*x));
+  assertEquals(NaN, x /= ((tmp = -2271503368.0341196, tmp)>>((tmp = 1224449194, tmp)>>>(tmp = 2976803997, tmp))));
+  assertEquals(NaN, x += (tmp = -1078313742.1633894, tmp));
+  assertEquals(NaN, x += (-787923311));
+  assertEquals(NaN, x %= x);
+  assertEquals(-1299878219, x ^= (2995089077));
+  assertEquals(536887953, x &= ((625660571.2651105)&(x^(((tmp = 950150725.2319129, tmp)+(-2122154205.466675))/(tmp = 1754964696.974752, tmp)))));
+  assertEquals(4096, x >>>= x);
+  assertEquals(1, x /= x);
+  assertEquals(-82508517, x ^= (((-930231800)%(tmp = -423861640.4356506, tmp))+x));
+  assertEquals(-82508517, x &= (x&x));
+  assertEquals(-479519, x %= ((tmp = 1861364600.595756, tmp)|x));
+  assertEquals(479518, x ^= (((x>>(-1539139751.6860313))>>(tmp = -456165734, tmp))|(-2786433531)));
+  assertEquals(959036, x += x);
+  assertEquals(29, x >>>= ((tmp = -1049329009.7632706, tmp)^(((((((1117739997)/(((-841179741.4939663)*(-1211599672))>>>((-413696355)%(tmp = -1753423217.2170188, tmp))))<<(tmp = 1599076219.09274, tmp))>>>(-1382960317))^(((x^(tmp = 515115394, tmp))>>>(tmp = -388476217, tmp))>>>(x/x)))^x)<<(136327532.213817))));
+  assertEquals(24, x &= (2388755418));
+  assertEquals(0, x >>>= (tmp = -405535917, tmp));
+  assertEquals(0, x &= (tmp = -1427139674, tmp));
+  assertEquals(NaN, x /= (x^((1530470340)%x)));
+  assertEquals(0, x |= ((x>>(-1429690909.8472774))*((((tmp = 2033516515, tmp)/(1314782862))>>>x)>>(tmp = 1737186497.6441216, tmp))));
+  assertEquals(0, x -= x);
+  assertEquals(0, x %= (3115422786));
+  assertEquals(-0, x *= (x+(tmp = -2558930842.267017, tmp)));
+  assertEquals(NaN, x %= x);
+  assertEquals(0, x &= (2695531252.254449));
+  assertEquals(-613178182, x ^= (-613178182));
+  assertEquals(54, x >>>= (x%(((tmp = 2277868389, tmp)^((((tmp = -1143932265.3616111, tmp)^((x&((x-((-2100384445.7850044)|(tmp = 908075129.3456883, tmp)))*x))+(((tmp = 1031013284.0275401, tmp)*((((tmp = -233393205, tmp)>>>(tmp = -111859419, tmp))*(-1199307178))|(tmp = -1998399599, tmp)))>>>((((-731759641.9036775)>>>(tmp = 2147849691, tmp))>>>(tmp = -2121899736, tmp))>>>(x>>>x)))))>>((1900348757.360562)^(tmp = 2726336203.6149445, tmp)))>>>((x*((tmp = -2697628471.0234947, tmp)%((x^(tmp = -2751379613.9474974, tmp))*x)))+(x>>(tmp = 42868998.384643435, tmp)))))+(598988941))));
+  assertEquals(34, x &= ((tmp = 2736218794.4991407, tmp)%(2169273288.1339874)));
+  assertEquals(2.086197133417468, x /= ((tmp = 2176358852.297597, tmp)%x));
+  assertEquals(2, x <<= (((tmp = -1767330075, tmp)|(-3107230779.8512735))&x));
+  assertEquals(4194304, x <<= (tmp = 1061841749.105744, tmp));
+  assertEquals(48609515, x ^= (44415211.320786595));
+  assertEquals(48609515, x %= (1308576139));
+  assertEquals(23735, x >>>= ((-324667786)-x));
+  assertEquals(23735, x <<= ((-1270911229)<<(((((tmp = -882992909.2692418, tmp)+(tmp = 394833767.947718, tmp))-x)<<(702856751))/x)));
+  assertEquals(-31080872939240, x *= (tmp = -1309495384, tmp));
+  assertEquals(-14625.31935626114, x /= ((668084131)+(1457057357)));
+  assertEquals(-14625.31935626114, x %= (266351304.6585492));
+  assertEquals(-12577, x |= (-945583977.619837));
+  assertEquals(-4097, x |= ((tmp = -2621808583.2322493, tmp)-(tmp = -2219802863.9072213, tmp)));
+  assertEquals(-1004843865, x &= ((-1004839768)+((tmp = 2094772311, tmp)/(-1340720370.275643))));
+  assertEquals(-31401371, x >>= ((2035921047)>>>((tmp = -1756995278, tmp)>>>(-537713689))));
+  assertEquals(1791746374.016472, x -= ((tmp = -1823147745, tmp)-(x/(tmp = -1906333520, tmp))));
+  assertEquals(3.7289343120517406, x /= (tmp = 480498240, tmp));
+  assertEquals(7.457868624103481, x += x);
+  assertEquals(234881024, x <<= (-781128807.2532628));
+  assertEquals(67108864, x &= (tmp = -2060391332, tmp));
+  assertEquals(-605958718, x -= (673067582));
+  assertEquals(-605958718, x <<= ((x%x)&((tmp = 1350579401.0801518, tmp)|x)));
+  assertEquals(-109268090.4715271, x %= (tmp = -496690627.5284729, tmp));
+  assertEquals(-109268090, x <<= (((-2004197436.8023896)%((x|((tmp = 271117765.61283946, tmp)-((1595775845.0754795)*(555248692.2512416))))/x))<<x));
+  assertEquals(-652725370, x &= (-543590449));
+  assertEquals(0.321858133298825, x /= (tmp = -2027990914.2267523, tmp));
+  assertEquals(1959498446, x ^= (1959498446));
+  assertEquals(1959498446, x &= (x%(tmp = 3155552362.973523, tmp)));
+  assertEquals(14949, x >>>= ((tmp = 586618136, tmp)>>>(tmp = 699144121.9458897, tmp)));
+  assertEquals(-28611391568319.285, x *= (tmp = -1913933478.3811147, tmp));
+  assertEquals(1680557633, x &= (((tmp = 2606436319.199714, tmp)<<(1575299025.6917372))|((-1092689109)/(735420388))));
+  assertEquals(1680361024, x &= ((tmp = 1860756552.2186172, tmp)|(-360434860.1699109)));
+  assertEquals(820488, x >>>= (1788658731));
+  assertEquals(820488, x >>= (-1555444352));
+  assertEquals(2104296413, x ^= (2103543509));
+  assertEquals(16843328, x &= ((x<<((-2920883149)/(1299091676)))-(((((tmp = 3199460211, tmp)+(-237287821.61504316))&(tmp = -1524515028.3596857, tmp))-(tmp = -700644414.6785603, tmp))+(-180715428.86124516))));
+  assertEquals(1326969834, x |= (tmp = -2968063574.793867, tmp));
+  assertEquals(0, x %= (x>>>(tmp = 1350490461.0012388, tmp)));
+  assertEquals(0, x &= ((-2620439260.902854)+x));
+  assertEquals(-1775533561, x |= ((-1775533561)|(((x>>>((861896808.2264911)>>>(970216466.6532537)))%x)%(tmp = 2007357223.8893046, tmp))));
+  assertEquals(-1775533561, x &= x);
+  assertEquals(-23058877.415584415, x /= ((tmp = -3002439857, tmp)>>((((x-(tmp = 1583620685.137125, tmp))|x)%(-2568798248.6863875))^x)));
+  assertEquals(-577.4155844151974, x %= (((-1440361053.047877)+((tmp = 821546785.0910633, tmp)-(((tmp = 1023830881.1444875, tmp)/(-754884477))+(tmp = 651938896.6258571, tmp))))>>(tmp = 346467413.8959185, tmp)));
+  assertEquals(-1, x >>= (tmp = 2993867511, tmp));
+  assertEquals(-1, x |= (tmp = 823150253.4916545, tmp));
+  assertEquals(-0, x %= x);
+  assertEquals(-0, x /= ((tmp = 997969036, tmp)&((((tmp = 928480121, tmp)>>(((-2610875857.086055)>>>(tmp = -2251704283, tmp))|x))+(10781750))>>x)));
+  assertEquals(0, x >>>= ((tmp = -1872319523, tmp)>>>(-278173884)));
+  assertEquals(0, x |= (x/(x*x)));
+  assertEquals(0, x %= ((77912826.10575807)^(tmp = 2770214585.3019757, tmp)));
+  assertEquals(0, x &= (tmp = 722275824, tmp));
+  assertEquals(-1417226266, x |= (tmp = 2877741030.1195555, tmp));
+  assertEquals(0, x ^= x);
+  assertEquals(0, x %= (tmp = -1740126105, tmp));
+  assertEquals(910709964, x |= (tmp = 910709964, tmp));
+  assertEquals(-1744830464, x <<= (tmp = -2445932551.1762686, tmp));
+  assertEquals(318767104, x >>>= (tmp = -2465332061.628887, tmp));
+  assertEquals(301989888, x &= (-2771167302.022801));
+  assertEquals(301989888, x |= x);
+  assertEquals(37748736, x >>= (tmp = -835820125, tmp));
+  assertEquals(1474977371, x ^= (tmp = -2857738661.6610327, tmp));
+  assertEquals(470467500, x += (-1004509871));
+  assertEquals(0.30466562575942585, x /= (((tmp = 1515955042, tmp)<<(x+((1607647367)-(tmp = 1427642709.697169, tmp))))^x));
+  assertEquals(1.0348231148499734e-10, x /= (tmp = 2944132397, tmp));
+  assertEquals(0, x >>= (x>>>(tmp = -2847037519.569043, tmp)));
+  assertEquals(NaN, x /= x);
+  assertEquals(0, x >>>= (-1817784819.9058492));
+  assertEquals(0, x >>= x);
+  assertEquals(-0, x *= ((tmp = -1387748473, tmp)|(x+(352432111))));
+  assertEquals(-0, x *= (((-2591789329)/(tmp = -2144460203, tmp))>>(tmp = -568837912.5033123, tmp)));
+  assertEquals(0, x <<= (-2963600437.305708));
+  assertEquals(0, x &= ((588720662)>>>x));
+  assertEquals(1561910729, x += (1561910729));
+  assertEquals(0, x ^= x);
+  assertEquals(-0, x *= (-2722445702));
+  assertEquals(0, x &= (tmp = -2738643199.732308, tmp));
+  assertEquals(0, x /= (((1859901899.227291)>>>((tmp = -1067365693, tmp)+((-1975435278)|x)))|((1844023313.3719304)&(tmp = -624215417.0227654, tmp))));
+  assertEquals(NaN, x %= x);
+  assertEquals(NaN, x %= (-2852766277));
+  assertEquals(0, x <<= (-1482859558));
+  assertEquals(0, x >>= x);
+  assertEquals(-1196775786, x += (tmp = -1196775786, tmp));
+  assertEquals(-68176201, x |= ((tmp = 2336517643, tmp)+x));
+  assertEquals(0, x ^= x);
+  assertEquals(0, x <<= x);
+  assertEquals(0, x >>= (2969141362.868086));
+  assertEquals(NaN, x %= x);
+  assertEquals(0, x >>= ((x-((((tmp = -905994835, tmp)|(tmp = 2850569869.33876, tmp))<<((-2405056608.27147)>>(tmp = 1280271785, tmp)))&(-1942926558)))*(tmp = 707499803.177796, tmp)));
+  assertEquals(0, x &= ((-697565829.8780258)+((2978584888.549406)%x)));
+  assertEquals(0, x >>= (748642824.4181392));
+  assertEquals(0, x += x);
+  assertEquals(0, x >>>= (-1701028721));
+  assertEquals(92042539, x -= ((-92042539)|(x*(x%(-293705541.00228095)))));
+  assertEquals(0, x %= x);
+  assertEquals(0, x >>= x);
+  assertEquals(0, x %= (-2278672472.458228));
+  assertEquals(0, x %= (((-2374117528.0359464)/((tmp = -2809986062, tmp)|(tmp = 895734980, tmp)))&(tmp = 1564711307.41494, tmp)));
+  assertEquals(0, x >>>= x);
+  assertEquals(0, x += x);
+  assertEquals(-0, x /= ((tmp = -2749286790.3666043, tmp)<<(x^(-2966741582.324482))));
+  assertEquals(0, x *= x);
+  assertEquals(0, x >>>= x);
+  assertEquals(-1882562314, x ^= (2412404982.782115));
+  assertEquals(-806620, x %= (((tmp = 1527219936.5232096, tmp)*(-1139841417))>>>(tmp = 201632907.3236668, tmp)));
+  assertEquals(-1613240, x += x);
+  assertEquals(-1664766177387640, x *= (1031939561));
+  assertEquals(-9.478083550117849e+23, x *= (tmp = 569334221.1571662, tmp));
+  assertEquals(-8.462574598319509e+21, x /= ((x-(tmp = -2985531211.114498, tmp))>>(tmp = 174615992.91117632, tmp)));
+  assertEquals(1638924288, x <<= (((((x>>((-1823401733.4788911)+((tmp = 1362371590, tmp)>>>x)))^(tmp = -56634380, tmp))/(tmp = 2387980757.1540084, tmp))%((((tmp = -3175469977, tmp)^(tmp = -1816794042, tmp))+(232726694))*(tmp = 822706176, tmp)))/(tmp = 1466729893.836311, tmp)));
+  assertEquals(2686072821796307000, x *= x);
+  assertEquals(-1007977445.9812208, x /= (-2664814408.800125));
+  assertEquals(-1007977445, x &= x);
+  assertEquals(322314656346249100, x *= (tmp = -319763758.54942775, tmp));
+  assertEquals(197436885.26815608, x /= (tmp = 1632494637, tmp));
+  assertEquals(-67191339, x |= ((-399580815.1746769)/((1335558363)/(tmp = 224694526, tmp))));
+  assertEquals(1229588737, x &= (tmp = 1296763683.5732255, tmp));
+  assertEquals(1229588737, x -= ((((1171546503)|((tmp = -2701891308, tmp)%(-2155432197.022206)))/(-306122816.85682726))>>x));
+  assertEquals(4162606632, x -= (tmp = -2933017895, tmp));
+  assertEquals(1.6487311395551163, x /= (2524733434.1748486));
+  assertEquals(-1929308648.9913044, x += (-1929308650.6400356));
+  assertEquals(-3858617297.982609, x += x);
+  assertEquals(788529152, x <<= (x^(1401824663)));
+  assertEquals(6160384, x >>>= ((((((x>>>x)>>((((x*(tmp = -1958877151, tmp))>>>(1310891043))-(tmp = 564909413.9962088, tmp))%(-175978438)))%x)|((tmp = -1193552419.7837512, tmp)*(tmp = 1508330424.9068346, tmp)))|(1428324616.3303494))-((1828673751)/(tmp = 1281364779, tmp))));
+  assertEquals(6160384, x |= x);
+  assertEquals(1, x /= x);
+  assertEquals(1, x &= (tmp = -855689741, tmp));
+  assertEquals(0, x >>>= x);
+  assertEquals(-1088569655.3528988, x -= (tmp = 1088569655.3528988, tmp));
+  assertEquals(-1088569655, x >>= ((tmp = 2429646226.626727, tmp)<<((-1539293782.4487276)>>(x^((tmp = 1140855945.537702, tmp)+x)))));
+  assertEquals(-311, x %= ((x/x)<<x));
+  assertEquals(1.2007722007722008, x /= (x|(tmp = 448796341.87655175, tmp)));
+  assertEquals(3, x |= (x+x));
+  assertEquals(-9.32416092168023e-10, x /= (-3217447688));
+  assertEquals(0, x >>= (615837464.0921166));
+  assertEquals(0, x >>>= (tmp = -2993750670.683118, tmp));
+  assertEquals(0, x >>>= (x%x));
+  assertEquals(1610612736, x ^= ((-1322905256.6770213)<<(-2567950598)));
+  assertEquals(1693676493, x ^= (83063757.63660407));
+  assertEquals(-758030371, x ^= (tmp = -1239274480, tmp));
+  assertEquals(-758030371, x %= (tmp = 1961339006, tmp));
+  assertEquals(-1509754528, x ^= (tmp = 1960027837, tmp));
+  assertEquals(-1509754528, x <<= x);
+  assertEquals(-1509754528, x -= (((tmp = -50690205.33559728, tmp)/((tmp = -1364565380, tmp)<<(tmp = 2585052504, tmp)))<<(tmp = -2356889596, tmp)));
+  assertEquals(1, x >>>= (-3204164321));
+  assertEquals(1, x *= x);
+  assertEquals(1114370230.591965, x *= ((tmp = 1114370229.591965, tmp)+x));
+  assertEquals(-4.886305275432552, x /= ((-228059887.33344483)%(2841553631.3685856)));
+  assertEquals(2.358309397373389e-9, x /= (((x*(tmp = 203428818.08174622, tmp))&(x-(((510438355)*x)+x)))+x));
+  assertEquals(0, x >>>= ((tmp = 1444810010, tmp)&(tmp = -3135701995.2235208, tmp)));
+  assertEquals(0, x /= (1865982928.6819582));
+  assertEquals(0, x *= x);
+  assertEquals(2078726016.3772051, x -= (tmp = -2078726016.3772051, tmp));
+  assertEquals(1580337898, x ^= ((tmp = -2714629398.447015, tmp)^x));
+  assertEquals(1268363034, x -= ((x+((tmp = 1144068248.3834887, tmp)&(-954104940.155973)))<<(tmp = 1270573731.7828264, tmp)));
+  assertEquals(1744830464, x <<= (((1444869551.7830744)>>>((((x+(tmp = -904688528, tmp))<<x)-((tmp = 121151912.85873199, tmp)/(tmp = -2414150217.66479, tmp)))|(((-472906698)|(3215236833.8417764))+(907737193.9056952))))-((x&(-732223723))|(-221800427.7392578))));
+  assertEquals(717338523283226600, x *= (x^(tmp = -2407450097.0604715, tmp)));
+  assertEquals(402653184, x >>= ((-3191405201.168252)*((tmp = -1941299639.695196, tmp)|(((x>>(((3215741220)>>>x)/(x+x)))^(((tmp = -2144862025.9842231, tmp)|((tmp = -1966913385, tmp)&x))%x))*((tmp = -1124749626.6112225, tmp)/(tmp = 837842574, tmp))))));
+  assertEquals(402653184, x &= ((x|x)>>x));
+  assertEquals(134217728, x &= ((2720231644.3849487)*x));
+  assertEquals(134217726.75839183, x -= ((2438054684.738043)/(((((-984359711)*(x|((tmp = 177559682, tmp)^x)))/(-1253443505))/((2727868438.416792)*(x+((x<<(((tmp = 3023774345, tmp)&(-705699616.0846889))/x))<<x))))^(1963626488.548761))));
+  assertEquals(1, x /= x);
+  assertEquals(245781494, x += ((tmp = 2551445099, tmp)^(2528486814)));
+  assertEquals(-1474427807, x ^= (-1497868393.342241));
+  assertEquals(-1057271682, x += ((((((x>>x)%(-1556081693))|(x/(((1166243186.6325684)-(((tmp = 2870118257.1019487, tmp)/(x+(-69909960)))^(2270610694.671496)))/((1463187204.5849519)-x))))-x)-(x<<(-3077313003)))%x));
+  assertEquals(-1065725846, x &= ((tmp = -1808223767, tmp)|(-481628214.3871765)));
+  assertEquals(-1065725846, x ^= (x&(((tmp = -1785170598, tmp)-(tmp = -2525350446.346484, tmp))/((((((-1783948056)^(tmp = 3027265884.41588, tmp))|((((tmp = 2195362566.2237773, tmp)<<(-2919444619))<<((tmp = -2507253075.2897573, tmp)^(x^((tmp = 1067516137, tmp)+((667737752)^(x*(tmp = -1187604212.7293758, tmp)))))))%(-617406719.5140038)))*(tmp = 511060465.6632478, tmp))*((tmp = 2580189800.752836, tmp)|((((tmp = 2357895660, tmp)%((-814381220)*(x-((x>>>(((x<<x)<<(tmp = 1919573020, tmp))-x))>>>((-2756011312.136148)>>(tmp = -1603458856, tmp))))))/((tmp = -1609199312, tmp)&(-3127643445)))%x)))<<(-2261731798)))));
+  assertEquals(1.6020307924030301, x /= (tmp = -665234308.2628405, tmp));
+  assertEquals(-1120020556.697667, x *= (tmp = -699125486.2321637, tmp));
+  assertEquals(-215875188, x -= (((((tmp = -1307845034, tmp)>>>((((-2820720421)^x)-(((x<<x)|(tmp = -3042092997.57406, tmp))+(((-1294857544)+((tmp = -668029108.1487186, tmp)>>(x<<x)))^(912144065.5274727))))^(389671596.2983854)))|(-2774264897.146559))%(x-((tmp = 1378085269, tmp)^x)))+((-1659377450.5247462)&(((1613063452.834885)>>>((-344896580.0694165)>>>((-13450558)+x)))^x))));
+  assertEquals(1, x /= x);
+  assertEquals(0, x >>>= (2355750790));
+  assertEquals(1969435421.4409347, x += (1969435421.4409347));
+  assertEquals(0, x -= x);
+  assertEquals(0, x >>>= (((x*((-1022802960.6953495)<<(tmp = -2848428731.8339424, tmp)))^(-1630921485))%(1532937011)));
+  assertEquals(0, x <<= ((x+((x^(x^(tmp = 2017651860, tmp)))&(((x<<(((tmp = -1913317290.8189478, tmp)|(x-((((x%((tmp = -3035245210, tmp)+(-2270863807)))>>>((-2351852712)*(x^(-2422943296.0239563))))&((((-1578312517)%x)*x)*(-65592270.28452802)))>>>(tmp = 1104329727.2094703, tmp))))-(tmp = -1431159990.3340137, tmp)))&x)|((tmp = -2589292678.801344, tmp)&(x+((((tmp = -2557773457.456996, tmp)>>(451910805.309445))-x)>>(((tmp = -1937832765.7654495, tmp)^x)%x)))))))%x));
+  assertEquals(0, x %= (tmp = -626944459, tmp));
+  assertEquals(-732310021, x |= (tmp = -732310021, tmp));
+  assertEquals(-732310021, x |= x);
+  assertEquals(671352839, x ^= (x-((-3087309090.7153115)|x)));
+  assertEquals(134479872, x &= (tmp = 2357183984, tmp));
+  assertEquals(18084835973136384, x *= x);
+  assertEquals(0, x <<= ((1040482277)-(tmp = -357113781.82650447, tmp)));
+  assertEquals(74957, x |= ((((tmp = -70789345.7489841, tmp)%(tmp = 1415750131, tmp))&x)|((307027314)>>(2284275468))));
+  assertEquals(9, x >>>= x);
+  assertEquals(0, x &= (x&((x*((x*(x%x))%(x>>x)))/x)));
+  assertEquals(-1872875060, x |= (2422092236.6850452));
+  assertEquals(9, x >>>= (-382763684));
+  assertEquals(4608, x <<= x);
+  assertEquals(40.480234260614935, x /= (((((((tmp = 814638767.5666755, tmp)&((tmp = 2081507162, tmp)^(x>>>(1460148331.2229118))))&(tmp = 1187669197.7318723, tmp))<<(412000677.93339765))^((tmp = 556111951, tmp)>>(tmp = -2232569601.292395, tmp)))&(-3006386864))/x));
+  assertEquals(32, x &= (-3053435209.383913));
+  assertEquals(418357217, x ^= (418357185));
+  assertEquals(204275, x >>= ((-1188650337.9010527)^((51494580)%(-2544545273))));
+  assertEquals(982392804, x += (((x+(((tmp = -982596937.9757051, tmp)+x)%(-2298479347)))^((((tmp = 1610297674.0732534, tmp)>>>x)*(((x>>(-2746780903.08599))&(-2376190704.247188))^(((20545353)/(tmp = 1468302977, tmp))-(x<<x))))>>(((-1434332028.0447056)/((tmp = 1983686888, tmp)&((tmp = 2324500847, tmp)%(394330230.6163173))))%(((-1129687479.2158055)+((-3127595161)*((-3066570223)&((tmp = 3192134577.4963055, tmp)/(-2697915283.3233275)))))+(-1112243977.5306559)))))|(x&(-2622725228))));
+  assertEquals(-2735750653096133600, x *= (-2784782870.9218984));
+  assertEquals(-1876329472, x |= ((((((2752866171)<<(-1681590319))/x)>>((tmp = 1451415208, tmp)>>>(1126858636.6634417)))+(((tmp = 2165569430.4844217, tmp)/x)^(((tmp = -1675421843.4364457, tmp)-(-2187743422.2866993))|x)))*x));
+  assertEquals(3520612287495799000, x *= x);
+  assertEquals(-200278016, x |= ((((-2379590931)%((((-1558827450.833285)&x)>>(-665140792))-((tmp = -445783631.05567217, tmp)+(tmp = 93938389.53113222, tmp))))/(3103476273.734701))^x));
+  assertEquals(-9178285062592.75, x *= ((2042671875.7211144)%(((tmp = 589269308.0452716, tmp)/x)<<(-130695915.9934752))));
+  assertEquals(60048960, x |= (x<<x));
+  assertEquals(60048960, x <<= ((((((tmp = -2793966650, tmp)/(-2882180652))&(((x<<((tmp = -384468710, tmp)+(2236162820.9930468)))>>>((((969371919)>>((tmp = -3153268403.2565875, tmp)-((((573811084)/x)^(tmp = -968372697.4844134, tmp))>>>(((-3096129189)>>x)/(tmp = 830228804.6249363, tmp)))))<<(((1243972633.3592157)|x)&((-1687610429)&(tmp = -1945063977.458529, tmp))))<<(((tmp = -217456781.37068868, tmp)-(400259171.68077815))^x)))>>>x))%(((2728450651.300167)/(((-2713666705.089135)%(tmp = 740472459, tmp))^x))|x))^x)*(-2463032364)));
+  assertEquals(60048960, x %= (tmp = -442107222.9513445, tmp));
+  assertEquals(-1573781504, x <<= (960581227));
+  assertEquals(1297, x >>>= (tmp = -1692919563, tmp));
+  assertEquals(1297, x &= x);
+  assertEquals(-3113308397155.233, x *= (tmp = -2400391979.3024154, tmp));
+  assertEquals(-3115513013486.233, x -= (2204616331));
+  assertEquals(-3113809649082.233, x -= (-1703364404));
+  assertEquals(0, x >>>= (((-1181206665)-(550946816.586771))|(tmp = -2346300456, tmp)));
+  assertEquals(0, x %= (tmp = 1649529739.2785435, tmp));
+  assertEquals(0, x ^= ((tmp = -2452761827.2870226, tmp)%(((1090281070.5550141)/(tmp = 992149154.6500508, tmp))*(x<<((((((x>>>x)|((tmp = -2410892363, tmp)%(tmp = 2585150431.0231533, tmp)))/x)*(tmp = 1541294271, tmp))+x)&((97566561.77126992)&((((-640933510.1287451)&(((((x>>>((-1821077041)<<((tmp = -1138504062.093695, tmp)-(tmp = -181292160, tmp))))%x)-(x>>((x&(((tmp = 1067551355, tmp)/(x|(1004837864.8550552)))&(x-(-103229639.25084043))))&((tmp = 2064184671.210937, tmp)+((((tmp = -2245728052, tmp)|(1538407002.8365717))+(x<<((x>>((76549490)/(tmp = 628901902.6084052, tmp)))<<((x<<x)^(-1907669184)))))+(-1409123688))))))>>>((((-1911547456.933543)-((-512313175)+((tmp = -2620903017, tmp)^(tmp = 2148757592.244808, tmp))))<<((-1740876865)>>>x))+((tmp = 691314720.9488736, tmp)<<(614057604.4104803))))|(x^((tmp = -3040687.291528702, tmp)/(x^(((x+(-2899641915))^((tmp = -1220211746, tmp)/x))%x))))))^(tmp = 119850608, tmp))%(2091975696))))))));
+  assertEquals(291273239, x -= (tmp = -291273239, tmp));
+  assertEquals(2206394018, x += (1915120779));
+  assertEquals(235641480, x <<= (x&(x&(-1810963865.1415658))));
+  assertEquals(28764, x >>= ((tmp = -1927011875, tmp)^((tmp = -1986461808, tmp)|((-868139264.8399222)*((421956566)%(3068424525))))));
+  assertEquals(-99780626900900, x *= ((tmp = -1512869526.3223472, tmp)+(tmp = -1956071751, tmp)));
+  assertEquals(51218520, x &= (((-2353401311)>>>x)-(2216842509)));
+  assertEquals(51218520, x >>>= ((tmp = -1534539302.6990812, tmp)<<x));
+  assertEquals(-2147483648, x <<= (-292608644));
+  assertEquals(-2147483648, x |= ((((((x<<((-2981292735)-x))>>((tmp = 2540545320.96558, tmp)&(tmp = -2343790880, tmp)))>>>((((((x^((-172697043.94487858)/((2627260337)>>(2879112814.1247935))))&(tmp = 3000943191, tmp))<<(tmp = 1094830905, tmp))-x)>>>x)>>((((tmp = 3095796200, tmp)^(x|(tmp = 1460377694, tmp)))<<(x^(tmp = -357546193, tmp)))/((2729539495)>>x))))%(tmp = 268894171.74961245, tmp))|(x>>(tmp = 2735650924, tmp)))/(-2197885357.09768)));
+  assertEquals(-2147483648, x |= x);
+  assertEquals(-1967162776824578000, x *= (tmp = 916031551, tmp));
+  assertEquals(-2147483648, x &= x);
+  assertEquals(-457743917756973060, x *= (tmp = 213153622, tmp));
+  assertEquals(0, x >>>= ((((tmp = 2930076928.480559, tmp)+(x^x))<<(tmp = -1349755597.1280541, tmp))|(x+(2865632849))));
+  assertEquals(0, x <<= ((x>>x)-(x>>(-2629977861))));
+  assertEquals(0, x <<= x);
+  assertEquals(NaN, x /= x);
+  assertEquals(0, x |= x);
+  assertEquals(0, x >>>= x);
+  assertEquals(749327478, x |= ((tmp = 749327478, tmp)^(x>>(tmp = 881107862, tmp))));
+  assertEquals(1897869364, x += (1148541886));
+  assertEquals(463347, x >>>= (tmp = -726431220, tmp));
+  assertEquals(-395990542, x += (-396453889));
+  assertEquals(-2824792585.1675367, x -= (2428802043.1675367));
+  assertEquals(-2147483648, x <<= (tmp = -1420072385.9175675, tmp));
+  assertEquals(8388608, x >>>= (-2211390680.488455));
+  assertEquals(8388608, x >>= (((x/(x|(((x^(((tmp = -2175960170.8055067, tmp)|((tmp = -1964957385.9669886, tmp)/(tmp = -475033330, tmp)))&((x|((tmp = 1386597019.2014387, tmp)>>((tmp = -2406589229.8801174, tmp)+x)))<<(tmp = -844032843.8415492, tmp))))>>(x^x))|x)))-((x&((tmp = 1858138856, tmp)*(-3156357504)))%x))<<(((2046448340)+x)/(-2645926916))));
+  assertEquals(8359470765396279, x *= ((tmp = 871437183.7888144, tmp)-(-125089387.17460155)));
+  assertEquals(0, x ^= x);
+  assertEquals(-303039014, x += ((tmp = -2475713214, tmp)|(-372871718.2343409)));
+  assertEquals(2655126577, x -= (-2958165591));
+  assertEquals(1830332793, x ^= (tmp = -212161208, tmp));
+  assertEquals(1830332793, x ^= (((2352454407.0126333)<<((((tmp = 3083552367, tmp)/x)-(-1243111279))-((tmp = -1669093976, tmp)%(((-757485455)-(tmp = -116051602, tmp))<<x))))>>(((((-2235071915.9536905)>>(tmp = -1284656185, tmp))-x)>>((-1807028069.7202528)>>>((x%((tmp = -3070857953.311804, tmp)+((tmp = 2759633693.441942, tmp)%((169489938)*(-1582267384)))))<<(x^((tmp = -787578860, tmp)<<x)))))>>((x/(x|(409464362)))-(tmp = -64033017, tmp)))));
+  assertEquals(397605933.90319204, x %= (tmp = 716363429.548404, tmp));
+  assertEquals(186400, x &= (((x%(-1745754586))>>>x)<<(x&(x&((-2163627752)-((1784050895)+(((-2864781121.899456)>>>x)&x)))))));
+  assertEquals(186400, x %= (tmp = -423209729, tmp));
+  assertEquals(186400, x <<= ((x<<(x+(1232575114.4447284)))*x));
+  assertEquals(1386299, x ^= ((tmp = -1074209615, tmp)>>>(x>>>((tmp = -1456741008.2654872, tmp)>>((1724761067)>>(-2016103779.9084842))))));
+  assertEquals(347302967.20758367, x -= (-345916668.20758367));
+  assertEquals(1.9325619389304094, x /= (179711170.03359854));
+  assertEquals(-3703324711.628227, x *= (tmp = -1916277371, tmp));
+  assertEquals(-920980517031624800, x *= (tmp = 248690187.53332615, tmp));
+  assertEquals(0, x &= (((tmp = -2753945953.082594, tmp)*x)-(172907186)));
+  assertEquals(-0, x /= (((((-2744323543.187253)>>((tmp = 2663112845, tmp)>>(((-121791600)+(x^x))*(2758944252.4214177))))|x)/(tmp = -2746716631.6805267, tmp))-x));
+  assertEquals(0, x ^= ((tmp = 983113117, tmp)&((2638307333)+((((tmp = 3076361304.56189, tmp)<<(-2663410588.5895214))%((-1109962112)-(tmp = -2381021732, tmp)))%((tmp = 410559095, tmp)&x)))));
+  assertEquals(0, x <<= (tmp = 1510895336.5111506, tmp));
+  assertEquals(0, x <<= (tmp = -1688348296.2730422, tmp));
+  assertEquals(2269471424, x -= (-2269471424));
+  assertEquals(-2022580224, x ^= (x%((tmp = 160999480.21415842, tmp)&x)));
+  assertEquals(-2077171712, x &= (tmp = 3032415014.3817654, tmp));
+  assertEquals(270727, x >>>= (2973489165.1553965));
+  assertEquals(270727, x |= x);
+  assertEquals(-1895894537, x |= ((tmp = -1895903118.129186, tmp)|x));
+  assertEquals(-1895894537, x -= ((((((((3143124509)>>>(-2866190144.8724117))*((x>>((961021882)*(tmp = 2363055833.8634424, tmp)))/((2032785518)+((2713643671.3420825)>>((-447782997.0173557)*((tmp = 1174918125.3178625, tmp)*((((tmp = -541539365.548115, tmp)%(-359633101))|(1765169562.2880063))+(tmp = -2512371966.374508, tmp))))))))/x)>>(x*((((-847238927.6399388)&(857288850))%(-2427015402))^((2221426567)%(x+x)))))>>>x)<<((tmp = 2009453564.2808268, tmp)>>((2924411494)<<(x>>(tmp = -1240031020.8711805, tmp)))))%(tmp = 3118159353, tmp)));
+  assertEquals(0, x ^= x);
+  assertEquals(0, x %= (-30151583));
+  assertEquals(-1035186736, x ^= ((tmp = -517593368, tmp)<<(tmp = 3216155585, tmp)));
+  assertEquals(49740, x >>>= x);
+  assertEquals(49740, x %= (640223506));
+  assertEquals(388, x >>>= ((x>>(tmp = 3161620923.50496, tmp))+(2605183207)));
+  assertEquals(776, x += x);
+  assertEquals(-97905, x ^= ((((((tmp = 145447047.8783008, tmp)^(((x>>>(tmp = 3014858214.2409887, tmp))>>>(629911626.132971))>>(((x+((369309637.229408)-x))<<(-2661038814.9204755))*(x+(x%(3025191323.4780884))))))+x)*(-482550691))|(-632782135))/x));
+  assertEquals(-97905, x %= ((((-492914681)-((-2508632959.269368)&(tmp = 1209318291, tmp)))>>(-723512989.459533))>>>(((-528429623.985692)&(x^(tmp = -925044503, tmp)))-(-1696531234))));
+  assertEquals(9585389025, x *= x);
+  assertEquals(-715425728, x <<= ((583763091)<<(-1223615295)));
+  assertEquals(-520093696, x <<= ((tmp = -1891357699.671592, tmp)*(((tmp = 3206095739.5163193, tmp)+(-2908596651.798733))>>>((tmp = -2820415686, tmp)>>(x|((((tmp = -566367675.6250327, tmp)*(-959117054))>>((((-187457085.89686918)*x)*(tmp = -2394776877.5373516, tmp))>>>x))|(((tmp = 80478970.46290505, tmp)<<(tmp = 2173570349.493097, tmp))-(x/((-2896765964)-((x/((tmp = 198741535.7034216, tmp)%(436741457)))%(tmp = 2936044280.0587225, tmp)))))))))));
+  assertEquals(-2520.5909527086624, x /= ((211290893.06029093)>>(663265322)));
+  assertEquals(-2520.5909527086624, x %= (x^((1057915688)<<(tmp = 1914820571.1142511, tmp))));
+  assertEquals(1, x >>>= (((894963408.7746166)+(tmp = -2888351666, tmp))|x));
+  assertEquals(-1989841636629996300, x += ((1424670316.224575)*((-2144149843.0876865)|((((421479301.0983993)|((3082651798)^(tmp = -271906497, tmp)))>>x)+((tmp = -178372083, tmp)%x)))));
+  assertEquals(17935384255.088326, x /= (((((((tmp = 1168194849.2361898, tmp)>>>(-107316520.53815603))>>>(x^(((x%((x>>>(((-2456622387)/x)&((2124689803)|(((-1130151701)^(2796315158))>>x))))-((-884686033.5491502)>>>((-2371185318.5358763)&x))))+(tmp = 558422989, tmp))|((tmp = -420359120.0596726, tmp)/((-1820568437.0587764)&(2298602280.266465))))))>>(x-((tmp = -1164568978, tmp)^x)))^x)-x)+x));
+  assertEquals(134233150, x &= ((x>>(((tmp = 98498118.13041973, tmp)-(804574397))/(tmp = -1564490985.7904541, tmp)))+x));
+  assertEquals(4, x >>= (449610809));
+  assertEquals(1912543790, x |= (1912543790));
+  assertEquals(2487274263, x += (tmp = 574730473, tmp));
+  assertEquals(-2140759118, x ^= (tmp = 338055333.9701035, tmp));
+  assertEquals(311607367, x += (2452366485));
+  assertEquals(9509, x >>= (372113647.84365284));
+  assertEquals(-2001075684.1562128, x += (-2001085193.1562128));
+  assertEquals(-638703280, x ^= (((tmp = 1096152237, tmp)&x)|((2707404245.0966487)-(((tmp = 1550233654.9691348, tmp)+(tmp = 2008619647, tmp))&((tmp = -2653266325, tmp)+(tmp = -280936332, tmp))))));
+  assertEquals(-101811850, x |= (-2250090202));
+  assertEquals(-13, x >>= ((-561312810.0218933)|(tmp = 79838949.86521482, tmp)));
+  assertEquals(-13, x >>= ((tmp = -936543584, tmp)/(1180727664.1746705)));
+  assertEquals(-1547, x *= (((tmp = 1005197689, tmp)>>>x)>>>(tmp = 34607588, tmp)));
+  assertEquals(2393209, x *= x);
+  assertEquals(2393209, x |= x);
+  assertEquals(0, x >>= (-2691279235.1215696));
+  assertEquals(0, x *= (((896175510.4920144)*((((tmp = 1770236555.7788959, tmp)%(537168585.7310632))/x)&(tmp = 1094337576, tmp)))&(((x-x)-x)>>x)));
+  assertEquals(-1922620126, x ^= (-1922620126));
+  assertEquals(3.43481396325761, x /= (tmp = -559745053.6088333, tmp));
+  assertEquals(0, x >>= x);
+  assertEquals(0, x >>>= (tmp = 2106956255.6602135, tmp));
+  assertEquals(-1339003770, x ^= ((tmp = 2955963526.960022, tmp)+x));
+  assertEquals(-0, x *= ((((tmp = 368669994, tmp)>>>(x*x))<<(tmp = 2355889375, tmp))&(tmp = -2267550563.9174895, tmp)));
+  assertEquals(0, x >>= (753848520.8946902));
+  assertEquals(0, x >>>= x);
+  assertEquals(0, x %= ((tmp = -2872753234.2257266, tmp)|x));
+  assertEquals(NaN, x %= (x>>>(tmp = 890474186.0898918, tmp)));
+  assertEquals(NaN, x %= ((tmp = 1341133992.284471, tmp)&(tmp = -2979219283.794898, tmp)));
+  assertEquals(NaN, x += (-2865467651.1743298));
+  assertEquals(NaN, x += ((-1424445677)%(x^(tmp = 1150366884, tmp))));
+  assertEquals(0, x &= (x+((tmp = 1499426534, tmp)+x)));
+  assertEquals(0, x |= (((((tmp = -2413914642, tmp)<<((x>>>x)^(1218748804)))+((((-1085643932.2642736)-(-1199134221.533854))>>(tmp = 2148778719, tmp))-((tmp = 1589158782.0040946, tmp)/(tmp = -2485474016.1575155, tmp))))>>>(x>>x))/(2230919719)));
+  assertEquals(0, x %= ((tmp = -2576387170.517563, tmp)>>>((tmp = -2362334915.919525, tmp)>>>(((3096453582)-(700067891.4834484))^(2396394772.9253683)))));
+  assertEquals(-1798103432, x ^= (((((tmp = 2396144191, tmp)*(x>>>(1512158325)))&(((-1256228298.5444434)&(((-2963136043.434966)&((tmp = 2472984854, tmp)+(tmp = -454900927, tmp)))%(tmp = 484255852.65332687, tmp)))>>((x%x)-x)))&(tmp = 929723984, tmp))^(tmp = -1798103432.5838807, tmp)));
+  assertEquals(-2137913344, x &= ((((x|(-2970116473))&(((x/x)/((tmp = 2853070005, tmp)>>>x))%(((tmp = -3123344846, tmp)/((2224296621.6742916)-(tmp = -2246403296.455411, tmp)))+((x&(((x^(x*(2829687641)))+x)&(tmp = 988992521, tmp)))^x))))<<((((-820608336)^(tmp = 2851897085, tmp))>>(tmp = -402427624, tmp))>>>x))-(((x*(((-2287402266.4821453)%(tmp = -520664172.1831205, tmp))^(x/(1875488837))))<<(tmp = 402393637, tmp))&(tmp = 1576638746.3047547, tmp))));
+  assertEquals(-2827557853031924000, x *= (tmp = 1322578326.6507945, tmp));
+  assertEquals(6.424459501778244e+27, x *= (tmp = -2272087729.3065624, tmp));
+  assertEquals(-1586887483, x |= (-1586887483));
+  assertEquals(-567868980691736100, x *= (tmp = 357850816, tmp));
+  assertEquals(1489101591, x ^= (x%(x|(421921075))));
+  assertEquals(-801213804822328000, x *= (x|(-672326904.6888077)));
+  assertEquals(612257233.6612054, x /= (((tmp = -350127617, tmp)>>>(-1140467595.9752212))<<((x^x)+(-3117914887))));
+  assertEquals(19097.231243331422, x /= ((x^(tmp = -570012517, tmp))>>>x));
+  assertEquals(0, x >>= ((x%(((-2347648358)%((x-(tmp = -456496327, tmp))|(x^(-1977407615.4582832))))<<(x/(tmp = -2021394626.214082, tmp))))%(tmp = -949323000.2442119, tmp)));
+  assertEquals(0, x <<= x);
+  assertEquals(NaN, x %= (x^(x>>(((tmp = 597147546.7701412, tmp)&(((((-972400689.6267757)|(tmp = -2390675341.6367044, tmp))|(tmp = 1890069123.9831812, tmp))<<(((1606974563)-(tmp = -2211617255.8450356, tmp))&((((x+((2433096953)&(-2527357746.681596)))*(tmp = -313956807.55609417, tmp))|((tmp = -2146031047.968496, tmp)/(tmp = 2851650714.68952, tmp)))>>(((tmp = 2630692376.6265225, tmp)-(tmp = -3162222598, tmp))>>((tmp = 1915552466, tmp)*(x>>>(-2413248225.7536864)))))))&(x%((((1218471556)|x)+(tmp = -849693122.6355379, tmp))+x))))>>>(x/((tmp = 689889363, tmp)/x))))));
+  assertEquals(0, x >>>= (45649573.23297));
+  assertEquals(0, x >>>= (tmp = 1084439432.771266, tmp));
+  assertEquals(NaN, x /= x);
+  assertEquals(NaN, x *= (tmp = 1642750077, tmp));
+  assertEquals(0, x >>>= (tmp = -1944001182.0778434, tmp));
+  assertEquals(1682573000, x |= (tmp = -2612394296.2858696, tmp));
+  assertEquals(3041823595, x -= (((tmp = 720576773, tmp)|(x^(-1068335724.2253149)))>>(x*(-2501017061))));
+  assertEquals(6083647190, x += x);
+  assertEquals(-6536258988089986000, x *= ((tmp = 632312939.6147232, tmp)|((-1621821634)+(((tmp = -2281369913.562131, tmp)&((tmp = -381226774, tmp)|x))&(664399051)))));
+  assertEquals(4.272268155938712e+37, x *= x);
+  assertEquals(733271152, x %= (-1345127171));
+  assertEquals(847089925, x ^= (tmp = 432620917.57699084, tmp));
+  assertEquals(1337073824, x <<= x);
+  assertEquals(-25810602, x ^= (tmp = 2982414838, tmp));
+  assertEquals(-25282209, x |= ((tmp = -2927596922, tmp)>>>(-2404046645.01413)));
+  assertEquals(639190091919681, x *= x);
+  assertEquals(173568320, x &= ((((tmp = -718515534.4119437, tmp)&(tmp = 2989263401, tmp))<<x)|((tmp = 537073030.5331153, tmp)-(tmp = 883595389.314624, tmp))));
+  assertEquals(0, x -= x);
+  assertEquals(0, x >>>= (tmp = -1844717424.917882, tmp));
+  assertEquals(0, x >>= (tmp = -462881544.2225325, tmp));
+  assertEquals(0, x >>= x);
+  assertEquals(-1868450038, x ^= (2426517258.6111603));
+  assertEquals(1, x /= x);
+  assertEquals(1175936039.4202638, x += (tmp = 1175936038.4202638, tmp));
+  assertEquals(-127916015, x ^= ((x/(1841969600.3012052))-(tmp = 1099467723, tmp)));
+  assertEquals(395713785658171900, x *= (-3093543726));
+  assertEquals(395713787128560900, x += (((((-717204758)*(tmp = -588182129.6898501, tmp))-x)+(tmp = 20638023, tmp))^x));
+  assertEquals(-962609355, x |= ((x^(-3118556619.912983))<<((tmp = 876126864, tmp)&x)));
+  assertEquals(-962609355, x %= (tmp = -2079049990, tmp));
+}
+f();
diff --git a/deps/v8/test/mjsunit/numops-fuzz-part2.js b/deps/v8/test/mjsunit/numops-fuzz-part2.js
new file mode 100644
index 0000000000..51260a4492
--- /dev/null
+++ b/deps/v8/test/mjsunit/numops-fuzz-part2.js
@@ -0,0 +1,1178 @@
+// Copyright 2011 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+function f() {
+  var x = -962609355;
+  var tmp = 0;
+  assertEquals(-114583755, x -= (((-2806715240)&(((1961136061.0329285)>>>((2087162059)*x))+((tmp = -1890084022.7631018, tmp)%(tmp = 2137514142.358262, tmp))))+(x<<(tmp = 2991240918, tmp))));
+  assertEquals(-425721856, x <<= x);
+  assertEquals(3778560, x >>>= ((x|(3198503572))>>(1158434541.1099558)));
+  assertEquals(3778560, x %= (tmp = -2592585378.9592104, tmp));
+  assertEquals(624640, x &= (tmp = 2261638192.9864054, tmp));
+  assertEquals(1249280, x += x);
+  assertEquals(1048576, x &= ((tmp = -2144301819.9892588, tmp)^((x-x)<<x)));
+  assertEquals(2097152, x <<= (x/x));
+  assertEquals(5069061551149729, x *= (tmp = 2417116904.8069615, tmp));
+  assertEquals(1.4836296666029616e+25, x += ((tmp = 2926833006.7121572, tmp)*x));
+  assertEquals(-256, x >>= ((-469330345.3589895)%((x^(((2554170843.4978285)/(2495676674.815263))>>>x))*(-918892963))));
+  assertEquals(-134217728, x <<= (x|(((((1687450853.1321645)+(tmp = 2369533014.5803776, tmp))+(tmp = -2613779445, tmp))+(tmp = -2488826226.3733397, tmp))>>(tmp = -220646936.41245174, tmp))));
+  assertEquals(704164545131708400, x *= ((-2632786741)+(-2613647956)));
+  assertEquals(9216, x >>>= (-1925405359.657349));
+  assertEquals(4491403261551.008, x *= (tmp = 487348444.1787118, tmp));
+  assertEquals(4490606381829.008, x -= (tmp = 796879722, tmp));
+  assertEquals(-60294056, x >>= x);
+  assertEquals(-3193966580.494005, x += (tmp = -3133672524.494005, tmp));
+  assertEquals(550500358, x >>>= ((tmp = -2779637628.390116, tmp)-((tmp = 29230786.984039664, tmp)%(tmp = -310649504.7704866, tmp))));
+  assertEquals(68812544, x >>= (-1347584797));
+  assertEquals(1.2120221595741834e-11, x /= ((2791020260)*((((1964870148.6358237)^x)|(-3082869417))-((x^x)&((1234292117.8790703)<<(-1792461937.2469518))))));
+  assertEquals(1.2120221595741834e-11, x %= (x-(2780439348)));
+  assertEquals(-1421552183, x |= (tmp = -1421552183.5930738, tmp));
+  assertEquals(-1420954119, x |= ((((-2547788562.5735893)<<x)%(435385623))>>(x|x)));
+  assertEquals(1, x /= x);
+  assertEquals(1, x >>= (x>>>(((2975715011.501709)-(tmp = -1473273552.981069, tmp))/(1654883913.042487))));
+  assertEquals(-65382, x ^= ((x/((tmp = -2780026200, tmp)<<x))^(((-2683084424)<<x)>>(-1716245874))));
+  assertEquals(1530921106, x &= (1530940914));
+  assertEquals(1, x /= x);
+  assertEquals(0, x >>= x);
+  assertEquals(0, x /= (tmp = 773741434.1972584, tmp));
+  assertEquals(0, x |= x);
+  assertEquals(0, x <<= (-67977514.99888301));
+  assertEquals(0, x %= (2496550482.524729));
+  assertEquals(-0, x /= (tmp = -515040417, tmp));
+  assertEquals(0, x <<= (-1673460935.2858837));
+  assertEquals(-2638209488, x += (-2638209488));
+  assertEquals(-2400951839498683400, x *= (910068685));
+  assertEquals(1600582036, x ^= (((-1247602308.4812562)>>(((-2393714444.179732)>>>x)%(-778140635.7165127)))+(-1933914727.2268424)));
+  assertEquals(0, x *= ((x-x)>>(-1270234575)));
+  assertEquals(0, x >>>= (tmp = 3193676327.493656, tmp));
+  assertEquals(0, x ^= (x>>>(1148676785.389884)));
+  assertEquals(0, x >>= (tmp = -2269181763.8663893, tmp));
+  assertEquals(0, x >>= (3149450221));
+  assertEquals(0, x >>= (1069630750));
+  assertEquals(-625009654, x ^= ((-2143499112)%(-759244728.6214335)));
+  assertEquals(3583943, x >>>= (-2942645558.1204453));
+  assertEquals(1791971, x >>= (x/x));
+  assertEquals(223996, x >>= x);
+  assertEquals(6999, x >>= (tmp = -1051883611.9443719, tmp));
+  assertEquals(1459617792, x <<= (-1572314984));
+  assertEquals(2622356453.269262, x -= (tmp = -1162738661.2692618, tmp));
+  assertEquals(5103676461.269262, x += (2481320008));
+  assertEquals(823989684.2692623, x %= (x^(((((1048362966)*((tmp = -2423040747.6233954, tmp)>>>x))*((tmp = 2330818588.4081, tmp)>>(tmp = 103312020.98346841, tmp)))+(tmp = 2264492857.144133, tmp))>>>((tmp = 2523442834, tmp)<<x))));
+  assertEquals(0, x >>>= (tmp = -2018700898.531027, tmp));
+  assertEquals(NaN, x /= x);
+  assertEquals(0, x <<= (tmp = -2489442223, tmp));
+  assertEquals(0, x >>= ((3045836220)>>>x));
+  assertEquals(-1156905149, x ^= (3138062147));
+  assertEquals(-0, x %= x);
+  assertEquals(-3118433907.512866, x -= ((tmp = 1338611238, tmp)-(-1779822669.5128663)));
+  assertEquals(100679693, x &= (1040565279));
+  assertEquals(10136400582574248, x *= x);
+  assertEquals(0, x %= x);
+  assertEquals(2400318405, x += (2400318405));
+  assertEquals(1.0036190808578471, x /= (((tmp = -2313492253.9889445, tmp)|(x-((tmp = -205459123, tmp)>>x)))+x));
+  assertEquals(0, x >>>= (tmp = 882343227.1675215, tmp));
+  assertEquals(0, x &= ((tmp = 2307828832.2706165, tmp)^((((((1404388047)<<((807879382)-(-2862921873)))-x)*(tmp = -1897734732, tmp))>>(tmp = 1981888881.2306776, tmp))%x)));
+  assertEquals(0, x <<= x);
+  assertEquals(0, x *= (((x*x)*((((2764801384.171454)%(x>>>x))&(384818815))+(x>>(tmp = -1481683516, tmp))))&x));
+  assertEquals(0, x >>= (tmp = -2202536436, tmp));
+  assertEquals(0, x ^= x);
+  assertEquals(0, x &= (tmp = 15161124, tmp));
+  assertEquals(-1586110900, x ^= (-1586110900));
+  assertEquals(-1586127952, x -= ((tmp = 560737212, tmp)%((1349529668)>>>(tmp = -1956656528, tmp))));
+  assertEquals(-1174945870, x -= ((1178456190)|x));
+  assertEquals(1335167624.3422346, x -= (tmp = -2510113494.3422346, tmp));
+  assertEquals(1329952126.3422346, x -= (x>>x));
+  assertEquals(1, x >>= x);
+  assertEquals(3, x |= (x<<x));
+  assertEquals(3, x -= (x-x));
+  assertEquals(-1938525669, x |= (tmp = 2356441625.5128202, tmp));
+  assertEquals(-1938525669, x ^= ((tmp = -197149141.3622346, tmp)/(2833823156)));
+  assertEquals(-2.6292393147661324, x /= (737295254.2254335));
+  assertEquals(2925975987.370761, x -= (-2925975990));
+  assertEquals(2925975987.370761, x %= (tmp = 3041184582.8197603, tmp));
+  assertEquals(-1908068660, x ^= ((tmp = -1380575181, tmp)-(2375164084.8366547)));
+  assertEquals(-477017165, x >>= (tmp = 2420877826.353099, tmp));
+  assertEquals(-477017165, x %= ((tmp = -2919204062.3683634, tmp)-(tmp = -2263328990, tmp)));
+  assertEquals(-2105539936, x &= ((tmp = -1630795440, tmp)-(x&((933423833)>>(-475069901)))));
+  assertEquals(-4979480720, x -= (tmp = 2873940784, tmp));
+  assertEquals(-4190953472, x -= (x&(tmp = -645918862.9001305, tmp)));
+  assertEquals(17564091004468855000, x *= x);
+  assertEquals(-857277134, x |= (tmp = 2363948338, tmp));
+  assertEquals(1015632515, x -= (-1872909649));
+  assertEquals(-1150380043, x ^= (tmp = -2014853770, tmp));
+  assertEquals(1607729152, x <<= ((2194449589)+(x|(tmp = -1470075256.4605722, tmp))));
+  assertEquals(1608356496, x |= ((((x|(670426524))<<((-2415862218)>>(tmp = 1572561529.9213061, tmp)))^((-1989566800.3681061)|x))&(2170270618.3401785)));
+  assertEquals(-1836056576, x <<= (tmp = 2906301296.540217, tmp));
+  assertEquals(-2952415961567723500, x *= (tmp = 1608020145, tmp));
+  assertEquals(1435500544, x <<= x);
+  assertEquals(700928, x >>>= (tmp = 2924829771.1804566, tmp));
+  assertEquals(0, x <<= ((x^(2410009094))|(((-164334714.18698573)%(x*x))|(tmp = 2182431441.2575436, tmp))));
+  assertEquals(-143321285, x ^= (tmp = -143321285, tmp));
+  assertEquals(-2, x >>= x);
+  assertEquals(-1, x >>= (x&(1109737404)));
+  assertEquals(1, x >>>= x);
+  assertEquals(0, x ^= x);
+  assertEquals(-2463707358.165766, x += (-2463707358.165766));
+  assertEquals(1831259938, x >>= (((((x-(tmp = 1359448920.5452857, tmp))%(tmp = -104541523, tmp))/((3133289055.9780197)*x))>>x)%x));
+  assertEquals(1858895646, x ^= ((tmp = 131424376, tmp)>>(tmp = -396761023, tmp)));
+  assertEquals(1, x >>= x);
+  assertEquals(-1888369021, x |= ((tmp = -2038869285.046599, tmp)^((tmp = -1318286592.4250565, tmp)-(tmp = 2825123496, tmp))));
+  assertEquals(1036458508, x <<= ((tmp = 2722401450, tmp)/((tmp = 1090712291, tmp)>>((tmp = -2155694696.9755683, tmp)*(tmp = 1661107340, tmp)))));
+  assertEquals(1, x /= (x%((tmp = -1716050484, tmp)+(tmp = -1683833551.797319, tmp))));
+  assertEquals(0, x >>= (tmp = -2899315628, tmp));
+  assertEquals(0, x |= x);
+  assertEquals(0, x >>>= x);
+  assertEquals(0, x <<= x);
+  assertEquals(1546062911, x |= (1546062911));
+  assertEquals(1546195271, x += ((tmp = -3210667091, tmp)>>(tmp = 1323121165, tmp)));
+  assertEquals(3092390542, x += x);
+  assertEquals(-1199626354, x |= (406783756));
+  assertEquals(-3650317194584908300, x *= (tmp = 3042878461.625484, tmp));
+  assertEquals(-7.650495675092354e+27, x *= (2095844078));
+  assertEquals(0, x >>= (tmp = 342617880.3384919, tmp));
+  assertEquals(22, x ^= (((tmp = 381409558.9104688, tmp)>>((2823172888.974557)>>x))>>x));
+  assertEquals(736383550, x += (736383528));
+  assertEquals(0, x %= x);
+  assertEquals(0, x += x);
+  assertEquals(-1553157831, x -= (1553157831));
+  assertEquals(1838556960, x <<= (3158944357.262641));
+  assertEquals(5503285699.188747, x *= ((tmp = 2437440276, tmp)/(814308583.8128904)));
+  assertEquals(5824889900.188747, x -= (((tmp = 1171445694, tmp)-(tmp = -1584666956, tmp))^(tmp = 1217545373, tmp)));
+  assertEquals(747032, x >>>= (-89332085));
+  assertEquals(747032, x |= (x^(x^(x>>>x))));
+  assertEquals(747032, x >>>= ((-1558482440)*((tmp = -2413907480, tmp)+(3003996862.384156))));
+  assertEquals(7.747761349084291e+23, x += ((tmp = 518064022.64624584, tmp)*((tmp = 2001951702, tmp)*x)));
+  assertEquals(0, x <<= (2769324707.5640426));
+  assertEquals(NaN, x %= (((((((-2458056470.7717686)&x)>>(tmp = -361831232.42602444, tmp))*(2611108609.6727047))>>>x)/(-1713747021.8431413))*(-1143281532)));
+  assertEquals(NaN, x %= ((x^((-613836813)*(tmp = -3180432597.0601435, tmp)))%x));
+  assertEquals(NaN, x /= ((-1607092857)^x));
+  assertEquals(0, x &= (-1190719534));
+  assertEquals(0, x >>>= x);
+  assertEquals(0, x += (x>>(642177579.1580218)));
+  assertEquals(-3129552333, x += (-3129552333));
+  assertEquals(1165414963, x &= x);
+  assertEquals(2222, x >>= (((tmp = 2606317568, tmp)|x)+(tmp = 1844107136, tmp)));
+  assertEquals(NaN, x %= ((x^x)<<(x/(((tmp = -1362148700, tmp)&((tmp = 76371048, tmp)<<x))>>>((x^(-2605741153))>>(((tmp = -2131608159.7634726, tmp)|(((2827792229.8004875)|(((-848439251)+(-2576768890.123433))|((tmp = -2617711776, tmp)-((-199980264)&((tmp = -46967951.76266599, tmp)/(-733253537))))))*(tmp = 1820087608, tmp)))>>>(tmp = -3118359396.4298744, tmp)))))));
+  assertEquals(NaN, x /= ((2144871731)*x));
+  assertEquals(NaN, x *= x);
+  assertEquals(NaN, x %= (tmp = 234811462.08692443, tmp));
+  assertEquals(0, x >>>= ((1121416685)|(x^(((tmp = -2905413334, tmp)<<(tmp = -3091554324.030834, tmp))<<x))));
+  assertEquals(-55938048, x |= ((tmp = -55938048, tmp)+(x*(tmp = -1518809027.2695136, tmp))));
+  assertEquals(-3.3234995678333864e-10, x /= (x*(tmp = -3008876576, tmp)));
+  assertEquals(0, x <<= (x/((((((-2168824234.2418427)>>(((tmp = 1976810951, tmp)%x)<<(x*(x>>(x%(3146266192))))))%(tmp = 1756971968.122397, tmp))>>>(-2859440157.8352804))/(-1001406.1919288635))>>>(-1358031926))));
+  assertEquals(-0, x *= (tmp = -1756000533, tmp));
+  assertEquals(-0, x %= (2522761446.869926));
+  assertEquals(0, x >>>= (((1087690535)>>>(2741387979))^x));
+  assertEquals(0, x -= x);
+  assertEquals(0, x >>= (-819422694.2188396));
+  assertEquals(0, x ^= x);
+  assertEquals(NaN, x /= x);
+  assertEquals(0, x &= (tmp = 86627723, tmp));
+  assertEquals(0, x += x);
+  assertEquals(0, x %= (tmp = -2317915475, tmp));
+  assertEquals(Infinity, x += (((-3072799584)^(-2487458319))/(((tmp = -3050692353, tmp)&x)>>(-777977292.8500206))));
+  assertEquals(Infinity, x += x);
+  assertEquals(Infinity, x -= (tmp = 484428269, tmp));
+  assertEquals(Infinity, x *= x);
+  assertEquals(Infinity, x /= (2059586218.2278104));
+  assertEquals(Infinity, x *= (tmp = 415918523.8350445, tmp));
+  assertEquals(-1800869091, x |= (((-1800869091)>>>(x>>>(tmp = -2832575051, tmp)))>>>x));
+  assertEquals(6196126991451132000, x *= ((-1467292383.8458765)+(-1973339154.7911158)));
+  assertEquals(6196126992684649000, x += (1233517421));
+  assertEquals(1, x /= x);
+  assertEquals(-7153809722216516000, x -= (((-2984550787.146106)<<(tmp = 743743974, tmp))*((3155151275)/((-1771412568.8965073)%x))));
+  assertEquals(-7153809721471491000, x -= (-745024056));
+  assertEquals(5.117699353102001e+37, x *= x);
+  assertEquals(0, x >>= x);
+  assertEquals(-0, x *= ((-2651785447.666973)<<(-1124902998)));
+  assertEquals(-0, x /= (2119202944));
+  assertEquals(1042673805.5205957, x -= ((x<<x)-(tmp = 1042673805.5205957, tmp)));
+  assertEquals(62, x >>>= (tmp = 2769597912.977452, tmp));
+  assertEquals(34, x &= ((tmp = -61541150, tmp)%(x^(-943160469))));
+  assertEquals(34, x ^= ((-2625482224.4605474)<<(-2277806338.3461556)));
+  assertEquals(536870912, x <<= ((-2373927426.4757633)^x));
+  assertEquals(536870912, x &= x);
+  assertEquals(512, x >>>= ((-1626769708.310139)<<((tmp = 641796314, tmp)/(721629637.3215691))));
+  assertEquals(0, x <<= (-113973033));
+  assertEquals(NaN, x /= x);
+  assertEquals(NaN, x += (-1602711788.2390788));
+  assertEquals(NaN, x *= (x%x));
+  assertEquals(0, x &= (x<<(x|(x>>((x>>>(x%((1182960050)^(((-220896609)-((((tmp = 1518275435.360103, tmp)/(tmp = -88234820, tmp))^x)/x))>>(3169930777.548236)))))-(tmp = -2912668817.662395, tmp))))));
+  assertEquals(0, x *= ((2323969408.7524366)/(((tmp = -3089229853, tmp)>>>((((tmp = -1012580544.5631487, tmp)>>(1138049418.9023373))>>x)&x))*(tmp = 626912001, tmp))));
+  assertEquals(0, x >>>= x);
+  assertEquals(NaN, x /= (x%(-868024322)));
+  assertEquals(NaN, x /= (tmp = -1749532322, tmp));
+  assertEquals(1861918711, x |= (-2433048585.853014));
+  assertEquals(1861918711, x >>= (((102451747)>>>((((241651917.47259736)/((((((((1759022236)^(tmp = -2592022722, tmp))+((-1748044969)>>>(704597925)))/(-1639604842))%((1349846853.7345295)<<(-729695861)))/(x>>((tmp = -2654474404.7365866, tmp)>>x)))>>>(((-480356478)|(x%((tmp = -1668269244.6979945, tmp)+(tmp = -2441424458.565183, tmp))))^((1634981212.7598324)>>>(tmp = 122455570.22000062, tmp))))<<x))*((tmp = -1058636137.5037816, tmp)+((2794083757.138838)&((x/(50081370))&x))))/x))/((tmp = -243106636, tmp)<<((x*((tmp = -648475219.5971704, tmp)>>((tmp = -1568913034, tmp)-((tmp = 911458615, tmp)|x))))>>>(tmp = 2714767933.920696, tmp)))));
+  assertEquals(0, x ^= x);
+  assertEquals(-2080484602, x |= (((1544771831.4758213)|x)^(-538113039)));
+  assertEquals(696451072, x <<= (tmp = -1587032689, tmp));
+  assertEquals(-162595645, x += (tmp = -859046717, tmp));
+  assertEquals(516546456, x >>>= x);
+  assertEquals(623083588, x += ((-1371850352)^(tmp = -1469933252, tmp)));
+  assertEquals(92342412, x %= (tmp = -132685294, tmp));
+  assertEquals(500272110, x |= ((tmp = 1616032506, tmp)%((tmp = 1589569590.4269853, tmp)|(-972791738.1829333))));
+  assertEquals(3247086, x %= (((tmp = 1372216208, tmp)|(-638950076.3387425))&((-2619249161.849716)&(73957896))));
+  assertEquals(0, x >>>= (tmp = -1482343462.6911879, tmp));
+  assertEquals(1265125662, x ^= (tmp = -3029841634, tmp));
+  assertEquals(4941897, x >>>= (-2039728632));
+  assertEquals(206857, x &= (tmp = 226962365.45571184, tmp));
+  assertEquals(1.0925018562586405e+24, x += ((tmp = 2687424146, tmp)*(((-1998020319)%x)*(-2080331363))));
+  assertEquals(-1.755270751212437e+32, x *= (-160665242));
+  assertEquals(0, x <<= (3152796521.6427975));
+  assertEquals(0, x ^= ((((((tmp = -855001595, tmp)<<(2007525777))-(x-(x-x)))/(3036585090.9701214))&(1827983388))*((tmp = -915604789.0515733, tmp)&(((((tmp = -806628722.7820358, tmp)%x)/(tmp = -2773117447, tmp))|x)<<(((tmp = -2902300974.7300634, tmp)|x)/(-1608133440))))));
+  assertEquals(0, x |= ((((((119024954)*(((x^(tmp = 2939514414, tmp))|x)^(x-(tmp = -1597415597.6795669, tmp))))+(((tmp = -182277816.14547157, tmp)<<(((-2983451324.3908825)^(tmp = 1572568307, tmp))+(-1165604960.8619013)))/(x>>((tmp = -2127699399, tmp)>>((x^(((((tmp = -1968667383, tmp)^(tmp = 3120052415.9964113, tmp))|(((x|(((x^((tmp = 2831505153, tmp)<<((-3150506831.547093)+((x%(tmp = 383761651, tmp))%(2856803457)))))+(((tmp = -2426953997, tmp)^(tmp = -2667954801.1010714, tmp))*(tmp = -2707801631, tmp)))&(tmp = 2082935238.794707, tmp)))^((tmp = 697573323.5349133, tmp)-x))%(tmp = 661936357, tmp)))/(-1717944600.261446))>>>((2423776015.0968056)^((-1410322010)|((x<<(tmp = 2935993226, tmp))/(tmp = -1533896392, tmp))))))*(tmp = -596675330, tmp))))))>>>(((2944268153)^(x&(144579050.93126357)))/(-2123810677.2619643)))>>>(1473040195.9009588))*x));
+  assertEquals(0, x /= (2877666495));
+  assertEquals(2174852514, x -= (tmp = -2174852514, tmp));
+  assertEquals(543713128, x >>>= x);
+  assertEquals(2978128878.939105, x += (tmp = 2434415750.939105, tmp));
+  assertEquals(3529591145844655600, x *= (tmp = 1185170719.3753138, tmp));
+  assertEquals(659, x >>>= ((((((x<<(((((-425423078)/(((tmp = 160617689.20550323, tmp)&(-1524740325.5003028))%(tmp = -1869426475, tmp)))<<(((x^(-487449247))>>>(tmp = -1962893666.7754712, tmp))%x))*x)>>((tmp = 623413085, tmp)&(x+(((((-2200726309.083274)-(x-x))+x)&(-1304849509))|((((tmp = -431896184, tmp)>>>(x>>(-1932126133)))<<((1078543321.2196498)*(-10761352)))>>(tmp = -2681391737.5003796, tmp)))))))/x)-(tmp = -1768629117, tmp))/(((((tmp = -2320718566.0664535, tmp)%x)+(-2831503351.995921))>>>(-2695416841.3578796))*(943979723)))<<x)|((652520546.7651662)>>(1045534827.6806792))));
+  assertEquals(531, x &= (tmp = -293707149, tmp));
+  assertEquals(0, x >>= (tmp = -678056747.5701449, tmp));
+  assertEquals(1184651529.8021393, x += (tmp = 1184651529.8021393, tmp));
+  assertEquals(1721719611, x |= (tmp = 1645413178, tmp));
+  assertEquals(-406880257, x |= (tmp = 2268544460, tmp));
+  assertEquals(-4194304, x <<= (tmp = -109701322.43455839, tmp));
+  assertEquals(17592186044416, x *= x);
+  assertEquals(0, x ^= (x&x));
+  assertEquals(0, x <<= (tmp = 1715401127, tmp));
+  assertEquals(-1793087394, x |= (tmp = -1793087394.730585, tmp));
+  assertEquals(-2, x >>= x);
+  assertEquals(263607360.10747814, x += (tmp = 263607362.10747814, tmp));
+  assertEquals(1073214955, x |= (893759979.3631718));
+  assertEquals(703953930, x -= ((2738450011)%(x^(tmp = 679402836, tmp))));
+  assertEquals(1, x >>= (tmp = 2262515165.6670284, tmp));
+  assertEquals(0, x >>= (((tmp = 747896494, tmp)^((tmp = -1005070319, tmp)+x))|x));
+  assertEquals(0, x >>= ((953612771)>>>(tmp = 3066170923.3875694, tmp)));
+  assertEquals(-314941454, x -= (x+(((314941454)%(((tmp = 2200222912.9440064, tmp)>>>(2534128736.805429))>>>(x|((747716234)%(((tmp = -252254528, tmp)%(-1553513480.1875453))&x)))))<<x)));
+  assertEquals(-535686958, x &= (-522809126));
+  assertEquals(0.5480312086215239, x /= (tmp = -977475278, tmp));
+  assertEquals(-1199953459.6090598, x *= ((-2189571393)+((3186862741.37774)>>(tmp = -2193090564.5026345, tmp))));
+  assertEquals(-1199953459.6090598, x %= ((tmp = 2986532440, tmp)*(2685122845)));
+  assertEquals(-1199953459.6090598, x %= (1951182743.7399902));
+  assertEquals(51262285383887820, x *= (-42720228));
+  assertEquals(-424776752, x |= x);
+  assertEquals(166221344210236600, x *= (tmp = -391314598.6158786, tmp));
+  assertEquals(-1883425600, x >>= (((tmp = -1020679296, tmp)^((-1416867718)+(-1412351617)))<<(-2743753169)));
+  assertEquals(0, x &= (x/(-2250026610)));
+  assertEquals(-1111956501, x ^= (tmp = 3183010795, tmp));
+  assertEquals(2012059503, x ^= (tmp = -900369276, tmp));
+  assertEquals(15719214, x >>>= (tmp = -3196277049, tmp));
+  assertEquals(15719214, x |= x);
+  assertEquals(100779035, x -= ((-1245802025)^(-2964289852)));
+  assertEquals(0, x >>= x);
+  assertEquals(0, x &= (((x<<((2361941389.708063)%x))>>((328256762.09842086)>>>((((tmp = 3094192285, tmp)-(((x>>(tmp = -2920437464, tmp))<<(tmp = -2693021467, tmp))-(x>>>((2410065554)%(x%(tmp = 2487056196.689908, tmp))))))-(tmp = -866314146, tmp))^((1754098471)-((((((-2450740191)-(tmp = 1977885539.6785035, tmp))*((tmp = -1205431332, tmp)>>>x))>>(-870601854))>>(tmp = -301859264, tmp))|((tmp = -2308971516.8301244, tmp)/x))))))&((2307007357)-((tmp = -1518812934, tmp)+(2562270162)))));
+  assertEquals(0, x <<= x);
+  assertEquals(-1802124619, x |= (-1802124619));
+  assertEquals(-1802124619, x %= ((1617132364.306333)+((1678465962.079633)|((516698570)%(((569813606)*(-1800804098.6270027))%((tmp = 1976706935, tmp)-((tmp = -1830228989.5488424, tmp)>>(((x^((tmp = 1015246068.3791624, tmp)>>x))^((-2171682812.246772)-(tmp = -398330350, tmp)))&x))))))));
+  assertEquals(904564673.6237984, x -= (tmp = -2706689292.6237984, tmp));
+  assertEquals(818237248768128900, x *= x);
+  assertEquals(254842325.2585001, x %= (1550087667.9657679));
+  assertEquals(-1163919360, x <<= x);
+  assertEquals(-3.4644526843674166, x /= ((-446801454)+(x>>>(tmp = -2025151870, tmp))));
+  assertEquals(0, x &= ((((((((-1739617728)&(x&(((tmp = -2946470036.552597, tmp)/x)*x)))^(-1130501404))>>>x)/((1870230831)>>>(840301398)))%x)/x)/(-2927537567)));
+  assertEquals(0, x >>= x);
+  assertEquals(0, x >>>= (x&(x&x)));
+  assertEquals(0, x &= ((-579614044)-(-756012505.4048488)));
+  assertEquals(-2970367642, x -= (tmp = 2970367642, tmp));
+  assertEquals(-415129376, x ^= (tmp = 2847041926.060355, tmp));
+  assertEquals(-1505681312, x &= (tmp = -1225184902.9215767, tmp));
+  assertEquals(-3174471329.5807734, x += (-1668790017.5807734));
+  assertEquals(-Infinity, x /= (x>>x));
+  assertEquals(NaN, x -= x);
+  assertEquals(0, x ^= (x^(((-1407936301.5682082)<<((x^(((tmp = 3213446217.307076, tmp)|x)|((tmp = 3219810777.3171635, tmp)/(tmp = 1561807400, tmp))))>>>((tmp = 2449910203.0949173, tmp)|((((1954662538.7453175)>>(tmp = -1711636239.9916713, tmp))>>>(tmp = 406219731.214718, tmp))<<(((-907908634.4609842)^((((((tmp = 2408712345, tmp)*(tmp = 1740346634.5154347, tmp))>>(tmp = 715783991, tmp))^(tmp = -655628853.2821262, tmp))%(tmp = 2819143280.434571, tmp))/(-1240412852)))*x)))))/x)));
+  assertEquals(0, x >>>= x);
+  assertEquals(0, x <<= x);
+  assertEquals(0, x >>>= (((-3198075268.8543105)>>(((((x+((tmp = -133461401.50823164, tmp)-((x&(((((tmp = 2617977319, tmp)>>((tmp = -2704719576.8734636, tmp)|((tmp = -977362542.2423751, tmp)<<(x<<(tmp = 3054487697.1441813, tmp)))))>>>((-1635655471)%x))/(-2079513672))%(tmp = 1993563806, tmp)))<<(tmp = -1310524200.6106496, tmp))))%((((-2558804500.7722936)+(tmp = -1641265491, tmp))<<((tmp = -1309608349, tmp)>>>x))/((tmp = -2306644272, tmp)<<x)))*(-2009396162.3063657))+(267343314.3720045))-(-2212612983.661479)))|x));
+  assertEquals(NaN, x %= x);
+  assertEquals(NaN, x *= x);
+  assertEquals(-824822309, x |= (-824822309));
+  assertEquals(-807944741, x |= (((-598067403)*((x&(tmp = 2897778389, tmp))>>>(-1322468310.3699632)))|x));
+  assertEquals(90004223.44097246, x /= (((tmp = -481122620, tmp)&x)%((tmp = 1109368524, tmp)/(((-3150568522.633032)<<(tmp = 2923396776, tmp))^(x-((x/x)&(x/(-287976185.1049104))))))));
+  assertEquals(0.4521931751193329, x /= (tmp = 199039323, tmp));
+  assertEquals(1.8110466604491368e-10, x /= (2496860986.492693));
+  assertEquals(0, x |= x);
+  assertEquals(-1225944576, x += ((tmp = -807700791.631221, tmp)<<((-700782615.4781106)-((((-2954619897)>>>x)<<((tmp = 997657844, tmp)>>>(1227994596)))/((-1234591654.8495834)*((tmp = -191189053.70693636, tmp)+(tmp = -3027659304, tmp)))))));
+  assertEquals(-1225811383, x |= (-1866233271));
+  assertEquals(3069155913, x >>>= (((x/(-99524153.40911508))%(x>>>((((tmp = 2985975640, tmp)/(tmp = 2781516546.2494454, tmp))&(((2234114508)|(((x/(tmp = -1224195047, tmp))<<x)^(x>>>((537884375.5698513)+x))))^((tmp = -2144817497.5089426, tmp)|(-498079183.8178189))))>>>((x+x)&(-3086080103.6460695)))))<<(((tmp = 2151157136, tmp)*x)/(((x/x)>>>(-1149734628.4364533))-((3025445835.654089)+(tmp = 530902725.91127443, tmp))))));
+  assertEquals(-1733702568, x ^= (tmp = 776361489.423534, tmp));
+  assertEquals(8981504, x &= ((tmp = 2902581847, tmp)*(x-(-2697760560))));
+  assertEquals(1153166.8526612986, x -= ((x/(tmp = -1375025594.5027463, tmp))+((3043576689.1538706)%(x+x))));
+  assertEquals(3389855, x |= (x+x));
+  assertEquals(-488458393.17759943, x += (-491848248.17759943));
+  assertEquals(40982867145206920, x *= ((3132857155)|(tmp = -218356553, tmp)));
+  assertEquals(688, x >>= (((((tmp = 403321821, tmp)+((tmp = 2536984658, tmp)%((tmp = 2759309029.8753624, tmp)|(((tmp = 1994203554.7417293, tmp)^((704660500.434877)*(tmp = 1536292958.2691746, tmp)))+(-164139788)))))/((1205950994.1255205)+x))^((((tmp = 975272146.0133443, tmp)-(150107797))/(-1764309514))^((x>>>(x^(x^x)))+(203250124))))>>>(tmp = 1864959239.512323, tmp)));
+  assertEquals(10, x >>= ((tmp = 1631996431.9620514, tmp)>>x));
+  assertEquals(10, x %= (tmp = 2678904916, tmp));
+  assertEquals(335544320, x <<= (tmp = -2759037415.6811256, tmp));
+  assertEquals(-153389967, x |= ((tmp = -2411636565, tmp)+(tmp = -2305156154, tmp)));
+  assertEquals(-1171, x >>= x);
+  assertEquals(813080576, x &= (((tmp = -65428547, tmp)&(tmp = 3163266999, tmp))<<x));
+  assertEquals(4346532303, x += ((tmp = -761515569.0707853, tmp)>>>(((tmp = 143240971.0661509, tmp)<<x)*(x^((tmp = -271697192.8471005, tmp)&x)))));
+  assertEquals(-863299035, x ^= ((((2663001827.1492147)>>>((x/(((tmp = 482665912, tmp)-(x>>(tmp = 354425840.784659, tmp)))>>((-2012932893)>>>x)))/((tmp = -1354385830.6042836, tmp)>>>(-2149023857))))^((tmp = 585746520, tmp)+(tmp = 756104608, tmp)))^(517529841.184085)));
+  assertEquals(-997654012, x &= (((tmp = -404836025.15326166, tmp)+((tmp = 3035650114.0402126, tmp)<<((-1308209196)>>(tmp = 693748480, tmp))))<<(((465774671.4458921)<<x)/(1971108057))));
+  assertEquals(-320581507110848260, x *= ((x-(tmp = -2266777911.7123194, tmp))^(tmp = -2810021113.304348, tmp)));
+  assertEquals(-320581508271196300, x += ((-1195215841.5355926)|(x-((2715907107.4276557)+(((-843426980)>>(x&(x%(tmp = -1139279208.34768, tmp))))^x)))));
+  assertEquals(368031616, x &= x);
+  assertEquals(368031616, x %= (tmp = 1211767328, tmp));
+  assertEquals(-67505614939510744, x *= (tmp = -183423412.56766033, tmp));
+  assertEquals(959424552, x >>= ((tmp = -171120122.5083747, tmp)/x));
+  assertEquals(30949179.096774194, x /= (((x-((((x&(tmp = -180770090, tmp))<<(((tmp = -2061363045.419958, tmp)*((655711531)^((1205768703)-(tmp = 2468523718.8679857, tmp))))+(-2746704581)))+((-853685888)*(tmp = -2299124234, tmp)))|(tmp = 2429502966, tmp)))|(((-985794986.0232368)>>>(2890862426))%x))>>(tmp = 1005542138.8415397, tmp)));
+  assertEquals(30949179, x |= x);
+  assertEquals(30949179, x %= (810126097.6814196));
+  assertEquals(120895, x >>= (tmp = 3065886056.1873975, tmp));
+  assertEquals(1934320, x <<= (1478650660.7445493));
+  assertEquals(0, x >>= (1069658046.2191329));
+  assertEquals(NaN, x %= x);
+  assertEquals(NaN, x %= (x*x));
+  assertEquals(NaN, x *= ((((2148513916)+(tmp = -210070225.85489202, tmp))>>(975470028))+((-3060642402)>>x)));
+  assertEquals(NaN, x *= (2888778384));
+  assertEquals(NaN, x -= (294531300.16350067));
+  assertEquals(-465620423, x ^= (tmp = -465620423.5891335, tmp));
+  assertEquals(1613303808, x &= (-2530649850.1952305));
+  assertEquals(2045458658, x |= (tmp = 432158946.5708574, tmp));
+  assertEquals(0, x >>>= (2277328255.770018));
+  assertEquals(0, x &= (-64904722.41319156));
+  assertEquals(0, x >>= x);
+  assertEquals(3109394857.361766, x += (3109394857.361766));
+  assertEquals(1519021650, x ^= ((tmp = -2632472653, tmp)|(tmp = 2161964921.8225584, tmp)));
+  assertEquals(370854, x >>>= ((1486892931.4564312)-((tmp = 3017755741.9547133, tmp)>>>x)));
+  assertEquals(1333145110.39802, x -= ((-1051580495.39802)-(tmp = 281193761, tmp)));
+  assertEquals(0, x ^= x);
+  assertEquals(0, x |= x);
+  assertEquals(0, x <<= x);
+  assertEquals(0, x >>>= x);
+  assertEquals(799202788.1455135, x -= (tmp = -799202788.1455135, tmp));
+  assertEquals(1539080192, x <<= (x%(((((x-x)|(((((x%(959993901))+(tmp = -2647575570.092733, tmp))/(tmp = -2040600976.5104427, tmp))*(x*(tmp = 2785252760, tmp)))>>(-377867259)))/((x&(1549738240.013423))>>>(tmp = -1502185618, tmp)))*x)%(1159283801.0002391))));
+  assertEquals(0, x >>= (-268660225));
+  assertEquals(-0, x /= (-2795206270.635887));
+  assertEquals(0, x >>>= (1869556260.2489955));
+  assertEquals(64202212, x ^= ((((tmp = -942983515.5386059, tmp)*(((1057759788)-x)*(tmp = 2038041858, tmp)))>>x)+(tmp = 64202212, tmp)));
+  assertEquals(2021126977, x -= ((tmp = -2009912898, tmp)^((2240062309)%x)));
+  assertEquals(4332348265459724000, x *= (tmp = 2143530968, tmp));
+  assertEquals(1472, x >>>= ((283380755)<<x));
+  assertEquals(-1672370407872, x *= (tmp = -1136121201, tmp));
+  assertEquals(338573318, x ^= (tmp = 2329579078.4832354, tmp));
+  assertEquals(2377388772.1662374, x -= (tmp = -2038815454.1662374, tmp));
+  assertEquals(-1.264761712403516, x /= ((((tmp = -2106209534, tmp)>>((((((tmp = 626190172, tmp)/x)>>>(-824270996.8545206))/((1258369810.9498723)-(tmp = -2947556209, tmp)))^((((366784589.24711144)|(1462064104.828938))-(1571045395.777879))<<(444685689.60103726)))>>(tmp = -2757110357.410516, tmp)))/(x>>>((tmp = 829226010, tmp)>>>(629512715))))|x));
+  assertEquals(-2905481691.264762, x -= (2905481690));
+  assertEquals(-1710543566.1481905, x -= (-1194938125.1165714));
+  assertEquals(-3421087132.296381, x += x);
+  assertEquals(-884178944, x <<= ((-1820881235)|x));
+  assertEquals(-884178944, x &= (x%(tmp = -2298828530, tmp)));
+  assertEquals(1516503040, x <<= ((tmp = -3039882653, tmp)+((tmp = 1956034508, tmp)<<(x>>(tmp = 280388051, tmp)))));
+  assertEquals(3033006080, x += x);
+  assertEquals(846431222.321887, x %= (x+(-1939718651.1609435)));
+  assertEquals(-846431224, x ^= ((-1742116766.54132)/x));
+  assertEquals(1157918728, x &= (tmp = 1966568030, tmp));
+  assertEquals(1157918728, x >>>= ((((((tmp = -2392096728.184257, tmp)*(x&(-3051259597.301086)))>>>(((tmp = 1712991918.071982, tmp)*(tmp = -714525951, tmp))-((-1784801647)>>((-1270567991)%(((214272558)/(((-3110194570)|(tmp = 2558910020, tmp))&(-1266294955.717899)))*((2654922400.609189)>>>(tmp = 370485018, tmp)))))))*(((tmp = -2621203138.1838865, tmp)%(858913517))*((tmp = -1564229442.2596471, tmp)>>((tmp = 1898557618, tmp)|(-1282356275)))))*(tmp = -1253508468, tmp))+((-361964404.75944185)|x)));
+  assertEquals(961668975, x += (-196249753));
+  assertEquals(1, x >>= (tmp = 890453053, tmp));
+  assertEquals(1, x >>= (((((tmp = 871309275, tmp)/(x>>>((tmp = 2033022083, tmp)&(tmp = -1393761939, tmp))))%((437488665.104565)^(tmp = 2808776860.4572067, tmp)))-((tmp = -359283111.49483967, tmp)<<((tmp = 2985855945, tmp)%(tmp = -596479825.9114966, tmp))))/(-1965528507)));
+  assertEquals(0, x >>= ((tmp = -1753776989, tmp)%(tmp = 322622654, tmp)));
+  assertEquals(84411424, x ^= (((x|(x|(tmp = -1617122265, tmp)))&(tmp = -313813263, tmp))&(1472888112.0258927)));
+  assertEquals(67633184, x &= ((1556833131.0776267)<<(x<<(1501219716.5575724))));
+  assertEquals(68002293, x |= (((tmp = 188984203.0350548, tmp)>>>(tmp = 1356052777, tmp))%(x*(tmp = -2944960865, tmp))));
+  assertEquals(67108864, x &= (((1046644783.9042064)<<x)+((-2796345632)>>>(((-1913290350.3687286)<<(((((tmp = -2223692353, tmp)>>x)&(x<<(x>>((((tmp = -976850020, tmp)%(tmp = 1379692507, tmp))>>>(1120103052.2077985))>>(tmp = 5592070.612784743, tmp)))))<<(x+((tmp = -3154037212.9764376, tmp)%(((x-(-1961060483.6965141))+(((1920670676)-(2852444470.7530622))/(((1445954602)>>((1353665887)>>(tmp = 111411560.64111042, tmp)))<<x)))+x))))<<((-1773130852.6651905)^((1216129132)>>(1511187313.2680469)))))|((tmp = -1107142147, tmp)|(tmp = -768165441.4956136, tmp))))));
+  assertEquals(0, x -= x);
+  assertEquals(0, x %= (tmp = -1655707538.0778136, tmp));
+  assertEquals(-184120712930843900, x += (x+((tmp = -3174410166, tmp)+((tmp = -301807453, tmp)*(tmp = 610060182.1666535, tmp)))));
+  assertEquals(-54598560, x >>= (-1365351357));
+  assertEquals(-6763.94449950446, x /= (((-1953016847)<<((673287269.7002038)%(-558739761)))>>>(tmp = 1607754129, tmp)));
+  assertEquals(-1, x >>= x);
+  assertEquals(1, x >>>= x);
+  assertEquals(0, x >>>= x);
+  assertEquals(0, x >>= ((-384747983)+((((tmp = -949058352.381772, tmp)>>>(-1920744986))-(-882729639))^((x^((tmp = 2351364046, tmp)<<(((tmp = -3110165747, tmp)^(-1266489735))-((tmp = -371614326, tmp)>>((tmp = -2064968414, tmp)&(-2075036504.617934))))))&(((-2616501739)&(tmp = 2591437335.4029164, tmp))>>x)))));
+  assertEquals(0, x >>>= ((tmp = 2946468282, tmp)&((-2741453019)>>x)));
+  assertEquals(0, x -= ((x%(-134700915))&(-1955768279)));
+  assertEquals(NaN, x /= x);
+  assertEquals(NaN, x /= (x^(((((((tmp = 3185669685.772061, tmp)>>(tmp = -1973500738, tmp))-(tmp = -87401348.93002152, tmp))>>(tmp = -2813508730, tmp))&(tmp = -778957225, tmp))<<(x-(x&((-2821756608)+(((((tmp = 2475456548, tmp)/(tmp = 997998362, tmp))<<((tmp = -83043634, tmp)|x))%(636120329))%(tmp = -1910213427.7556462, tmp))))))%x)));
+  assertEquals(0, x &= x);
+  assertEquals(0, x <<= x);
+  assertEquals(0, x >>>= (x%x));
+  assertEquals(0, x %= (745221113));
+  assertEquals(0, x >>>= ((1467615554.7672596)|x));
+  assertEquals(0, x /= (tmp = 735317995, tmp));
+  assertEquals(-1513001460, x |= (2781965836));
+  assertEquals(-1513001460, x |= (x%(1970577124.3780568)));
+  assertEquals(-0, x %= x);
+  assertEquals(1864972269, x ^= (-2429995027.840316));
+  assertEquals(1226843341, x &= (tmp = -639621923.5135081, tmp));
+  assertEquals(1226843339.3171186, x += ((1297620268.272113)/(-771070549)));
+  assertEquals(76677708, x >>>= (1009134980));
+  assertEquals(0, x ^= x);
+  assertEquals(0, x ^= x);
+  assertEquals(NaN, x /= x);
+  assertEquals(716040787, x |= ((1851586229)-(1135545441.3502865)));
+  assertEquals(1385693184, x <<= x);
+  assertEquals(1321, x >>= (x^((tmp = -1576632297.0860603, tmp)>>>(405218605))));
+  assertEquals(-1319012931, x |= (-1319014243));
+  assertEquals(-1319012931, x >>= ((((1689898279.3580785)<<((((x^(x>>>((((tmp = 2635260332, tmp)*(tmp = 2053357650, tmp))*x)*(2856480122.339903))))>>x)&(-2382703000.077593))%(1183918594)))*(tmp = -1670081449, tmp))<<x));
+  assertEquals(-528327581.7646315, x %= (tmp = -790685349.2353685, tmp));
+  assertEquals(2073431790, x ^= (tmp = 2601800333, tmp));
+  assertEquals(-6514722684180, x -= (((tmp = 824141806.0668694, tmp)>>>(((-1865885282.8723454)&(x&(x|((900188006.3757659)>>>(x&x)))))+(2227126244.0526423)))*x));
+  assertEquals(1450593, x >>>= ((2157053647)>>(x+(-2934071355.418474))));
+  assertEquals(576782336, x <<= ((1054640368.827202)&((tmp = -3182236876.434615, tmp)>>(tmp = 2129856634.0328193, tmp))));
+  assertEquals(2950754326, x -= (tmp = -2373971990, tmp));
+  assertEquals(738197504, x <<= (1188157369.5988827));
+  assertEquals(0, x <<= (x+((tmp = -839533141, tmp)&((((((tmp = -1148768474.7306862, tmp)|(172650299))+(tmp = -2739838654, tmp))/(3132557129))%x)>>>(tmp = -1229961746.2466633, tmp)))));
+  assertEquals(0, x %= (tmp = -2974207636, tmp));
+  assertEquals(0, x %= ((2323482163)>>>x));
+  assertEquals(0, x &= (((x/(x+(x>>((tmp = 55935149, tmp)%x))))|((3109182235)>>>(tmp = 1217127738.8831062, tmp)))+((((tmp = -385114910, tmp)*((((((tmp = -2535158574.634239, tmp)&(x+x))<<(-2821692922.43476))&(-776804130.9457026))>>((-1374832535)^(tmp = 2175402162.701251, tmp)))%(-1646995095)))-(x*(tmp = -921556123, tmp)))^(79224621))));
+  assertEquals(128935435, x |= ((tmp = 2279459038, tmp)%(tmp = -537630900.5271742, tmp)));
+  assertEquals(128935435, x /= ((((((x<<(2750024311))-((-1332480769.4784315)&(1418160003)))&(1551783357))<<(((((-2870460218.55027)|((-1958752193.7746758)&(2551525625)))>>>((((tmp = -1698256471, tmp)^(((((((((tmp = -830799466, tmp)+x)-(-111590590))+(tmp = -1105568112.3921182, tmp))/((tmp = -3058577907, tmp)|(((-1944923240.2965696)%(-2884545285))<<(tmp = -1993196044.1645615, tmp))))^(x>>(tmp = -2961488181.3795304, tmp)))&x)*x)|(((tmp = 97259132.88922262, tmp)<<((1601451019.343733)&x))*(x|x))))+((((x>>x)<<x)+(-868409202.2512136))/(((tmp = -2893170791, tmp)-((x|(-853641616))%(((tmp = 549313922, tmp)&(-768036601.6759064))%(tmp = -543862220.9338839, tmp))))-((tmp = 1639851636, tmp)+((2164412959)/(-273028039.941242))))))>>>((((-2382311775.753495)^(-2062191030.2406163))>>>(tmp = -1054563031, tmp))/(-862111938.7009578))))%x)+(-3103170117.625942)))%((tmp = -1144062234, tmp)>>x))>>>(tmp = 1216332814.00042, tmp)));
+  assertEquals(41.631074722901715, x /= (x&(-2542806180.962227)));
+  assertEquals(41.631074722901715, x %= (-14003386.556780577));
+  assertEquals(8, x &= (x&((-2231622948)%(tmp = 488279963.9445952, tmp))));
+  assertEquals(9.002961614252625e-9, x /= ((53802728.56204891)<<(((867697152.3709695)-(538719895.5707034))&(-631307825.4491808))));
+  assertEquals(0, x >>= x);
+  assertEquals(-0, x *= (tmp = -785674989, tmp));
+  assertEquals(-0, x += x);
+  assertEquals(0, x /= (-250703244));
+  assertEquals(0, x <<= ((tmp = -661062581.5511999, tmp)|x));
+  assertEquals(0, x &= (-1299482308));
+  assertEquals(0, x &= ((-399690060)>>>(2448074202.385213)));
+  assertEquals(0, x &= (2574341201));
+  assertEquals(0, x <<= ((x|(((tmp = 2458873162.645012, tmp)+(tmp = -1999705422.8188977, tmp))<<((x^(tmp = -392530472, tmp))>>>x)))&(((tmp = 2463000826.7781224, tmp)|(tmp = 3020656037, tmp))-x)));
+  assertEquals(1397603760, x += ((tmp = -1359413071, tmp)-(tmp = -2757016831, tmp)));
+  assertEquals(513823851, x -= (883779909));
+  assertEquals(-1765712747, x ^= (2288060670.6797976));
+  assertEquals(3117741504918286000, x *= x);
+  assertEquals(3117741506284045300, x += (1365759456));
+  assertEquals(6035555595.597267, x /= (tmp = 516562470, tmp));
+  assertEquals(104203275, x &= (tmp = 376835755.32434213, tmp));
+  assertEquals(10858322520725624, x *= x);
+  assertEquals(59458951, x >>>= (153765028));
+  assertEquals(49370856, x += ((tmp = -1291276092, tmp)>>x));
+  assertEquals(0, x %= x);
+  assertEquals(0, x += x);
+  assertEquals(-1494589645, x -= (1494589645));
+  assertEquals(-0, x %= x);
+  assertEquals(0, x <<= (x&((2730708043.467806)<<x)));
+  assertEquals(0, x /= ((tmp = -1483912394.153527, tmp)>>>((tmp = 1800568769, tmp)^((((((tmp = 1351568510, tmp)>>(tmp = -1337992543.2562337, tmp))>>>(tmp = 2602239360.40513, tmp))*x)%x)+(-2095840128.0700707)))));
+  assertEquals(-0, x /= ((2363946613)^(tmp = -2227868069, tmp)));
+  assertEquals(0, x &= ((((2634933507)<<(2798775374.140882))>>>x)>>>(((tmp = 1135200853.6396222, tmp)-(tmp = -1529829490.7007523, tmp))-(((((((((x^((x|(2135742668.591568))-(924230444.8390535)))%(tmp = -2459525610.51898, tmp))+(x&((tmp = 1177231743.809653, tmp)/(tmp = 1743270357.2735395, tmp))))|(((tmp = -1894305017, tmp)^((tmp = 1791704240, tmp)&x))%(-1569751461)))>>>(tmp = -2078321944, tmp))|x)*(((x*(tmp = -163239354, tmp))<<((tmp = 2859087562.694203, tmp)&(-657988325.9410558)))^(2508013840)))-((-243572350)+(x%((-1095206140)+((tmp = 3213566608.942816, tmp)*((2256442613)%((tmp = 1723751298, tmp)^(x-((-1145710681.2693722)|x)))))))))+(1556870627)))));
+  assertEquals(130883024.97423434, x -= (-130883024.97423434));
+  assertEquals(0.046720352789736276, x /= (tmp = 2801413456, tmp));
+  assertEquals(1806558189, x |= (tmp = 1806558189.157823, tmp));
+  assertEquals(72.40475060062144, x /= (x%((1932591076.531628)>>(1982030182))));
+  assertEquals(-1077558321.5975945, x += (tmp = -1077558394.002345, tmp));
+  assertEquals(98187, x >>>= x);
+  assertEquals(97792, x &= (tmp = -1032487404, tmp));
+  assertEquals(709197609, x |= (x^(709179177)));
+  assertEquals(11081212, x >>>= (tmp = 1412940006.169063, tmp));
+  assertEquals(11081212, x &= x);
+  assertEquals(-1920311203, x -= ((tmp = 1931392415, tmp)<<((x%(tmp = -2873576383, tmp))%x)));
+  assertEquals(-1920311203, x |= (x&(-993884718.2172024)));
+  assertEquals(-4, x >>= (1409411613.0051966));
+  assertEquals(-7947632484, x *= ((-2856731734)^((-1181032235.9132767)-((tmp = 780101930, tmp)+((tmp = -1732707132.6253016, tmp)^x)))));
+  assertEquals(-2016362769, x ^= (tmp = 2711125619.2455907, tmp));
+  assertEquals(-61535, x >>= x);
+  assertEquals(-124771649, x ^= (tmp = 124726558, tmp));
+  assertEquals(-1, x >>= x);
+  assertEquals(-0, x %= (x*x));
+  assertEquals(0, x <<= x);
+  assertEquals(0, x /= (2444628112));
+  assertEquals(0, x <<= ((-38968517.72504854)<<x));
+  assertEquals(-1504619917, x |= (tmp = 2790347379, tmp));
+  assertEquals(-1504619917, x &= x);
+  assertEquals(2790347379, x >>>= ((1825218368)<<(-1843582593.2843356)));
+  assertEquals(7786038495492170000, x *= x);
+  assertEquals(-11011696, x |= (((tmp = 2931644407.4936504, tmp)-(3077095016.001658))%(tmp = -1731851949, tmp)));
+  assertEquals(-107866, x %= ((-697845074.1661191)>>(772708134)));
+  assertEquals(356779149, x ^= (-356884949.503757));
+  assertEquals(0, x %= x);
+  assertEquals(0, x *= ((tmp = 1542291783, tmp)^x));
+  assertEquals(0, x += ((tmp = 1105314644.002441, tmp)&x));
+  assertEquals(-1005882993, x ^= (-1005882993.0899806));
+  assertEquals(-1301065066, x += (tmp = -295182073, tmp));
+  assertEquals(-1454702592, x <<= ((-2440858737.390277)&(-1363565201.7888322)));
+  assertEquals(-201539012492525570, x *= ((((tmp = -1416268089, tmp)|x)-(tmp = 1669129769, tmp))&(x<<((x/(-2614041678.7423654))%x))));
+  assertEquals(-2.1995276811535986e+25, x *= (x/(-1846667987.154371)));
+  assertEquals(0, x |= ((x*(((x>>>((tmp = 1044173034, tmp)>>>((x<<((tmp = -2906412863, tmp)%((tmp = -437401503, tmp)<<(((((x|(2167319070))<<((tmp = 2766179640.1840167, tmp)&(-2372076054)))*(tmp = -241617431.06416297, tmp))*((((((tmp = 2570465382.5574293, tmp)>>>(x/((-2851324509.354545)%x)))>>(((x+((tmp = -614687945, tmp)^x))^((((tmp = 1653437743, tmp)>>x)/(tmp = 3072995069, tmp))>>x))*(((((-290508242)>>((tmp = 2969511554, tmp)<<(tmp = 158176292.95642304, tmp)))<<(32376015))+(tmp = 2391895870.4562025, tmp))*x)))&((((x/(tmp = 365292078.53605413, tmp))>>x)/(1167322811.0008812))|(((tmp = 2487970377.365221, tmp)^x)<<((tmp = 2342607988.711308, tmp)/(((2276081555.340126)-(((tmp = -2571071930, tmp)>>(tmp = -248468735.76550984, tmp))>>>(tmp = -2862254985.608489, tmp)))^(-1312017395))))))<<x)&(2762717852.949236)))+((((-2492896493)&x)<<(-2756272781.4642315))/x)))))*(2405395452))))>>((-1433975206)/((tmp = -2064757738.6740267, tmp)<<((((tmp = -1563531255, tmp)-(-589277532.2110934))<<x)^(2249328237.0923448)))))-x))-(-225624231)));
+  assertEquals(0, x *= (tmp = 1657982666.2188392, tmp));
+  assertEquals(86443387, x |= (tmp = 86443387.25165462, tmp));
+  assertEquals(86443387, x %= (-1341731981.702294));
+  assertEquals(172886774, x <<= ((-1799840391)&(1011948481.310498)));
+  assertEquals(-1115684864, x <<= x);
+  assertEquals(-2098253702059525600, x *= (1880686715.1865616));
+  assertEquals(-2098253700213206300, x -= (tmp = -1846319435.0583687, tmp));
+  assertEquals(570692096, x &= (((tmp = -1572055366.64332, tmp)%(tmp = 1720120910, tmp))%((x-(912386952.5959761))*(tmp = -1146251719.4027123, tmp))));
+  assertEquals(603979776, x <<= ((-329752233.8144052)&(tmp = -368636559, tmp)));
+  assertEquals(603979776, x <<= x);
+  assertEquals(364791569817010200, x *= x);
+  assertEquals(0, x &= ((2074587775.983799)/(tmp = 438856632.76449287, tmp)));
+  assertEquals(0, x &= (((1509671758)*(tmp = -935801537.7325008, tmp))>>>(((tmp = -1752877566, tmp)<<x)%(tmp = -517163766, tmp))));
+  assertEquals(-2031730599, x ^= ((2264285273)&(tmp = -1762662949.014101, tmp)));
+  assertEquals(-843578945, x %= (-1188151654));
+  assertEquals(-2147483648, x <<= x);
+  assertEquals(-2147483648, x >>= (tmp = -3165079200.229641, tmp));
+  assertEquals(-44086313.1323726, x %= ((x%(-254466243.48728585))-((x>>(-457411829.1063688))-((-2606923436.9333453)/x))));
+  assertEquals(-44086313, x |= x);
+  assertEquals(1037812, x >>>= ((tmp = 342497258.9786743, tmp)+(1652928385.8150895)));
+  assertEquals(-2371695599678100, x *= (tmp = -2285284425, tmp));
+  assertEquals(-2371697387004653, x += (tmp = -1787326553.0542095, tmp));
+  assertEquals(0, x ^= x);
+  assertEquals(0, x >>= ((x^(tmp = 544039787, tmp))>>>x));
+  assertEquals(0, x &= ((x%(((((((tmp = -424572417.1088555, tmp)|(-2381863189))/(tmp = -2007482475.1809125, tmp))&(((((tmp = 311016073, tmp)>>(tmp = -1548839845, tmp))+((-2557740399.7947464)<<(2399113209)))&x)>>>x))%(-297180308.7721617))-(tmp = 860906293, tmp))^x))%(-2740622304)));
+  assertEquals(4971841192462909000, x += ((tmp = -2723203837.572612, tmp)+((((-2909100706)+(-951999374))|(-3116735764))*(3087123539.422669))));
+  assertEquals(-460, x >>= (1081807537.557404));
+  assertEquals(2354165127.3906384, x += (tmp = 2354165587.3906384, tmp));
+  assertEquals(357.8680960002211, x /= ((((x<<(((x&x)+(1113841407))|((x/(tmp = 384533564, tmp))>>>(-605853882))))%x)&((tmp = 2050375842, tmp)>>>x))>>(((2745147573)^x)<<(x-(900043292)))));
+  assertEquals(0, x *= (x>>>(-295974954.5058532)));
+  assertEquals(0, x *= ((-2448592125.815531)*(tmp = -94957474.8986013, tmp)));
+  assertEquals(0, x &= ((x>>x)^(tmp = -1335129180, tmp)));
+  assertEquals(395092065, x |= ((3081659156)^(tmp = -1608334475, tmp)));
+  assertEquals(395092065, x &= x);
+  assertEquals(-413337639, x += (x^(tmp = -664996071.3641524, tmp)));
+  assertEquals(-1604423637896759800, x *= (x>>>(tmp = 1242912352.955432, tmp)));
+  assertEquals(0, x &= ((((((tmp = 651293313, tmp)|(((2541604468.635497)>>>(tmp = 758815817.7145422, tmp))>>>((-1948795647)/x)))&x)/((tmp = -3161497100, tmp)+(782910972.3648237)))>>>x)%(834206255.5560443)));
+  assertEquals(0, x >>>= (tmp = 125945571, tmp));
+  assertEquals(NaN, x -= (x%x));
+  assertEquals(NaN, x %= (tmp = 282259853, tmp));
+  assertEquals(NaN, x += (tmp = -2081332383, tmp));
+  assertEquals(0, x >>>= (((x>>(-2298589097.7522116))|((((x>>>(x-(tmp = 755218194, tmp)))|x)%x)-(tmp = 2206031927, tmp)))>>>((((x&(x-x))^(tmp = 2836686653, tmp))*((x<<(tmp = -1624140906.4099245, tmp))>>>((2942895486)|((x>>>x)>>>(-1586571476)))))|((781668993)+(-1857786909)))));
+  assertEquals(0, x &= (tmp = -708084218.9248881, tmp));
+  assertEquals(0, x %= (1645913394.5625715));
+  assertEquals(0, x <<= ((x^((tmp = 1185413900, tmp)*((-2441179733.997965)*(tmp = 2554099020.066989, tmp))))%((1704286567.29923)/x)));
+  assertEquals(0, x += x);
+  assertEquals(0, x *= x);
+  assertEquals(0, x |= (x>>>(139138112.141927)));
+  assertEquals(0, x >>>= (tmp = 2142326564, tmp));
+  assertEquals(0, x |= x);
+  assertEquals(-0, x /= ((((x+(2817799428))|x)%((1050079768)-(x>>>((1452893834.8981247)|((((tmp = -1737187310.889149, tmp)/(tmp = -362842139, tmp))%(1234225406))%(((x|x)*((-1055695643.739629)-((x-x)*(945954197.676585))))-(tmp = 786185315.346615, tmp)))))))<<(-173891691)));
+  assertEquals(0, x &= (-2842855092.319309));
+  assertEquals(0, x &= ((-3188403836.570895)/x));
+  assertEquals(0, x *= (x+x));
+  assertEquals(NaN, x /= (x>>>(((tmp = 391037497.68871593, tmp)/((192754032)*(1382659402.5745282)))/((((-2187364928)>>>x)>>(tmp = 2563448665.7594023, tmp))^(tmp = 1500866009.7632217, tmp)))));
+  assertEquals(NaN, x /= ((tmp = -935036555.2500343, tmp)-(x/(((x&(x^(tmp = -3001352832.5034075, tmp)))^x)/((1122547613)>>x)))));
+  assertEquals(0, x >>= (tmp = -2951766379.0809536, tmp));
+  assertEquals(-632945188, x ^= (-632945188.7188203));
+  assertEquals(-632945188, x %= ((((((tmp = -3181527314.82724, tmp)&(2280175415))>>(x^(x|x)))^(tmp = -524233678.52970886, tmp))*x)|((tmp = 1782882786, tmp)>>>(tmp = -592607219, tmp))));
+  assertEquals(404189184, x <<= ((tmp = -2761472127, tmp)^(36616299.88780403)));
+  assertEquals(872651572, x ^= (tmp = 739568436.6252247, tmp));
+  assertEquals(13, x >>>= ((tmp = -1033843418.865577, tmp)%(x%(1247263629.0445533))));
+  assertEquals(0, x >>>= x);
+  assertEquals(0, x >>= (3189175317));
+  assertEquals(0, x &= (((2391973519.6142406)^((-2950058736.191456)|(x*x)))>>(tmp = 343822384.294345, tmp)));
+  assertEquals(0, x >>>= (tmp = -2306246544, tmp));
+  assertEquals(-1572339598, x ^= ((tmp = 2991380083.337327, tmp)&(tmp = -1361507970, tmp)));
+  assertEquals(649, x >>>= ((1961407923.4950056)>>(x-(-872821523.7513013))));
+  assertEquals(649, x ^= (((x&(tmp = -702931788, tmp))^(((x>>x)|(((tmp = 2710759269, tmp)/(x>>(x*((((((tmp = -2428445134.9555864, tmp)+(-1859938743))%(x<<x))*((236868604)+((tmp = -3066688385, tmp)/(787503572.8839133))))/(tmp = 3215629315, tmp))>>(-1315823020)))))%(1461368627.1293125)))>>>(tmp = -2921804417.5735087, tmp)))/(x>>>(((tmp = 2175260691.824617, tmp)/((-582958935.7628009)-((((((x>>x)|(2590503723.4810824))^(tmp = -1994324549, tmp))-(-684683327))/(tmp = -3133419531, tmp))|(tmp = -328974092.05095506, tmp))))>>(-447624639.4518213)))));
+  assertEquals(649, x %= ((((1854382717)|(((x+(tmp = 2568081234, tmp))-x)+((tmp = 1043086140, tmp)<<((tmp = 2979118595.0496006, tmp)+((x&(2669577199.852803))/(-2567808445.101112))))))<<((((tmp = -1471092047, tmp)&((-3099138855.21041)-((tmp = -798574377.526715, tmp)&((2255586141)<<(-1069867774)))))>>>(((x*(tmp = -2810255707.781517, tmp))/x)*(2706435744.054121)))^(394262253)))^((844325548.0612085)/(tmp = 1434691648, tmp))));
+  assertEquals(823215943.1924392, x += (tmp = 823215294.1924392, tmp));
+  assertEquals(536872706, x &= ((-334612686)%((1303605874)|x)));
+  assertEquals(-30666374.413486242, x += ((tmp = -567539080.4134862, tmp)%(tmp = -1655555936.3195171, tmp)));
+  assertEquals(-56438727096752984, x *= (tmp = 1840410814, tmp));
+  assertEquals(-33200107.984488487, x %= (((tmp = 3007206509, tmp)-(3079337725.6659536))%(1819565202.5011497)));
+  assertEquals(-1214493182, x ^= (-3060193769));
+  assertEquals(-1214493179.1335113, x -= ((-3218099496.595745)/(1122662554)));
+  assertEquals(-1214493179, x >>= ((-375364195)<<(((tmp = 619439637.8754326, tmp)>>(-1830023279.9486575))&(tmp = -1106180387.2448823, tmp))));
+  assertEquals(-303623295, x >>= (-2109241374.3349872));
+  assertEquals(-0, x %= x);
+  assertEquals(0, x |= x);
+  assertEquals(1917126206, x -= (-1917126206));
+  assertEquals(2659779928, x -= (tmp = -742653722, tmp));
+  assertEquals(-1635187368, x >>= ((tmp = -674385169, tmp)*((9848362.783326745)|(x*(55220544.00989556)))));
+  assertEquals(-1981113695, x ^= ((tmp = 392404985, tmp)>>(((x<<((2006207061)<<(tmp = 2558988218, tmp)))*((((tmp = 1789304307.1153054, tmp)/(2538061546))<<(tmp = 556026116, tmp))&((tmp = 1076457999.6424632, tmp)*(tmp = -1822378633.2489474, tmp))))%(((((-1117046924)&((-69013651)%(x&(((-2320327696)/(x&x))-(tmp = 2458222544, tmp)))))>>((-3092360983.0037227)/(-3171415636)))*(((tmp = 2520431213, tmp)<<(1066492762.6149663))+((tmp = 1272200889, tmp)^((1687693123.2295754)+x))))-(-1096823395)))));
+  assertEquals(-990556848, x >>= x);
+  assertEquals(981202869119695100, x *= x);
+  assertEquals(981202869119695100, x -= (x/x));
+  assertEquals(0, x ^= (x>>x));
+  assertEquals(NaN, x %= x);
+  assertEquals(0, x ^= x);
+  assertEquals(0, x *= ((((2980512718)>>>x)<<((x^(-1111233869))>>((2531466092.6036797)>>>(((tmp = -1791229364, tmp)*(-2210950307.206208))%((tmp = -806645443, tmp)<<((((((((tmp = 112334634.26187229, tmp)%(x|((((2154021796.1166573)+x)&((-1047293079.9686966)^(tmp = -1894127139, tmp)))+(tmp = 1910946653.2314827, tmp))))^(293142672.5016146))-x)<<(-1593533039.8718698))+x)>>(x<<(((46359706.50393462)&(tmp = 272146661, tmp))|(tmp = 2117690168, tmp))))%(tmp = -1784737092.4924843, tmp)))))))-(1465796246)));
+  assertEquals(0, x &= x);
+  assertEquals(NaN, x %= x);
+  assertEquals(0, x &= (x+(-1612418456)));
+  assertEquals(0, x &= ((tmp = -843964311, tmp)/x));
+  assertEquals(NaN, x /= x);
+  assertEquals(NaN, x *= x);
+  assertEquals(NaN, x += (x>>>(54020240)));
+  assertEquals(489206868, x |= (489206868));
+  assertEquals(489206868, x &= x);
+  assertEquals(489206848, x &= ((tmp = -1699133906.2361684, tmp)>>(tmp = 2658633814, tmp)));
+  assertEquals(489206848, x |= x);
+  assertEquals(1910559006, x -= (tmp = -1421352158, tmp));
+  assertEquals(1, x >>= x);
+  assertEquals(0, x -= x);
+  assertEquals(0, x %= (x^(tmp = 2745376003.2927403, tmp)));
+  assertEquals(0, x %= (((tmp = 3199743302.1063356, tmp)^((-1905944176)&(x>>>(187247029.5209098))))<<((x*((-1394648387)*(1252234289)))-(3140049815))));
+  assertEquals(0, x <<= (-2567872355));
+  assertEquals(0, x %= (tmp = 1057707555.8604916, tmp));
+  assertEquals(0, x %= ((tmp = -1877857405.0228279, tmp)>>>(((tmp = 423831184, tmp)*((tmp = -2106757468.324615, tmp)%(tmp = -1197717524.6540637, tmp)))>>(tmp = -93746263.46774769, tmp))));
+  assertEquals(0, x |= x);
+  assertEquals(-0, x *= ((tmp = 1317609776.6323466, tmp)*(tmp = -26959885.89325118, tmp)));
+  assertEquals(0, x >>= (-1288116122.0091262));
+  assertEquals(0, x &= ((370818172.92511404)%((tmp = -528319853.54781747, tmp)*(x/((tmp = -2839758076, tmp)^(x+(((-1258213460.041857)<<(tmp = 302017800.72064054, tmp))|((((tmp = -624254210, tmp)^((-338165065.97507)|((623392964)-x)))>>>x)%(tmp = 2767629843.0643625, tmp)))))))));
+  assertEquals(0, x >>>= x);
+  assertEquals(0, x >>>= x);
+  assertEquals(0, x |= ((-2001549164.1988192)*x));
+  assertEquals(0, x -= x);
+  assertEquals(0, x *= (((((165836842.14390492)*(tmp = -3220002961, tmp))|(-2840620221.747431))%((x/(tmp = 3153915610, tmp))>>>(tmp = 2018941558, tmp)))>>>x));
+  assertEquals(-0, x *= (-231994402.93764925));
+  assertEquals(0, x <<= x);
+  assertEquals(0, x %= (tmp = 2702385056.1149964, tmp));
+  assertEquals(0, x <<= (tmp = 378459323, tmp));
+  assertEquals(0, x >>>= ((x&(x&(((-1014963013)<<(x&((tmp = -3110294840, tmp)|(x+(x<<(1129643420))))))+(1093795819.1853619))))+((((tmp = -2295103369.697398, tmp)&(((370501313.43019223)>>>(2465439579))/x))-x)>>x)));
+  assertEquals(0, x /= ((tmp = 1779625847, tmp)+(tmp = -662459654.6908865, tmp)));
+  assertEquals(0, x -= x);
+  assertEquals(0, x %= ((tmp = 2723291421, tmp)|(277246502.4027958)));
+  assertEquals(0, x ^= (((-2936270162)>>>((((tmp = -2019015609.1648235, tmp)|(47218153))*(-823685284))+x))&(x<<(x*(x|(((tmp = -941955398, tmp)^(tmp = -2365238993.5300865, tmp))-(778674685)))))));
+  assertEquals(0, x >>>= x);
+  assertEquals(NaN, x %= x);
+  assertEquals(0, x &= (-175235975.8858137));
+  assertEquals(-2684493800.1062117, x += (tmp = -2684493800.1062117, tmp));
+  assertEquals(-1290806265.6063132, x -= (-1393687534.4998984));
+  assertEquals(-1290806265, x >>= (((x>>(tmp = -1710112056.4935386, tmp))*(586227650.2860553))<<(tmp = -2918251533.6052856, tmp)));
+  assertEquals(23470008, x >>>= x);
+  assertEquals(1668734969, x |= ((-295560682.9663689)^(x|((((tmp = -1183847364, tmp)&(3135327694))+(1679127747.1406744))-((-1895825528)%((tmp = -3180115006, tmp)+((tmp = 2373812187, tmp)|x)))))));
+  assertEquals(1744306169, x |= (1188503928.5009093));
+  assertEquals(1744306169, x %= (tmp = -2723982401.4997177, tmp));
+  assertEquals(3488612338, x += x);
+  assertEquals(3488612337, x += (((x/(-325849204))>>x)|(-1820624550.9149108)));
+  assertEquals(-1511119305, x ^= (tmp = 1778506182.2952862, tmp));
+  assertEquals(-12211415, x %= (x^(tmp = -54943035, tmp)));
+  assertEquals(-12211415, x %= ((-1267051884)%(-643566443.0122576)));
+  assertEquals(-30.84976063258681, x /= (((1052047194)>>>x)&(1495698235.5117269)));
+  assertEquals(-61.69952126517362, x += x);
+  assertEquals(-244, x <<= (x^(x+(tmp = -2822258210.076373, tmp))));
+  assertEquals(-6652, x &= ((tmp = 2593685093, tmp)>>((((2047688852.4609032)<<((x*(-611076291))*x))^(-2665364024.817528))>>>(165267874))));
+  assertEquals(0, x -= x);
+  assertEquals(0, x /= (2454186758));
+  assertEquals(0, x &= (tmp = -2226895206, tmp));
+  assertEquals(0, x += x);
+  assertEquals(-21390701, x += ((-1369004846.0816503)>>(tmp = -2661552634.039692, tmp)));
+  assertEquals(-0.012568536912921919, x /= (1701924507.856429));
+  assertEquals(7.09517966608176e-11, x /= (tmp = -177141911.8955555, tmp));
+  assertEquals(0, x >>= (tmp = 231535697, tmp));
+  assertEquals(1383687797, x ^= (tmp = -2911279499.568808, tmp));
+  assertEquals(1383687797, x %= (tmp = -2258636646.5294995, tmp));
+  assertEquals(1319, x >>= ((tmp = -2549411892.8426056, tmp)/(((((1532476676)^(153720871.82640445))+x)/(((2988190456.3206205)&(tmp = -2920873674, tmp))-(((((tmp = -1044518167.0581458, tmp)>>x)-((((tmp = -194701879.13505793, tmp)&(498352051))&((tmp = -2167339635.6529818, tmp)^(((x>>(tmp = 700159851, tmp))*(tmp = 2874921158, tmp))/x)))-((2856128689)|((-1876321441)>>>(2110732915)))))^((((tmp = -193379494.18825436, tmp)/(-3055182489.533142))<<x)+((tmp = -2286109605, tmp)>>(tmp = 698475484.3987849, tmp))))^(3182231653.500364))))|(((tmp = -194670835, tmp)>>>((786780139)%(((2114171416.2305853)^(1703145352.8143656))/x)))>>>((tmp = -3029462067, tmp)>>((67647572.02624655)&(x*(-2394283060))))))));
+  assertEquals(13903855, x |= ((tmp = -2515306586, tmp)>>>x));
+  assertEquals(54311, x >>>= ((-2413722658)-((tmp = -2159787584, tmp)^(tmp = 949937622.9744623, tmp))));
+  assertEquals(108622, x += x);
+  assertEquals(1250717187, x ^= ((tmp = 842692148, tmp)+(((2649331689.694273)<<x)-(tmp = -2992181273, tmp))));
+  assertEquals(4536777, x %= (tmp = 73304730, tmp));
+  assertEquals(0, x -= x);
+  assertEquals(-580081499, x ^= ((tmp = -580081499.0170684, tmp)^(x%(tmp = -1542730817.88261, tmp))));
+  assertEquals(-1382738784, x <<= x);
+  assertEquals(-1382738784, x <<= x);
+  assertEquals(2912228512, x >>>= (x*(x>>>x)));
+  assertEquals(-1076374105, x |= (2589443367));
+  assertEquals(-0.2818750938197037, x /= (((tmp = -1559525732.9603848, tmp)|(-477068917.5483327))>>>((-688616257)*((((tmp = -1192490153.1226473, tmp)*(-502280624.0265591))<<(-442688727.4881985))%(x+(((((tmp = -2948836853.831935, tmp)-(tmp = -2850398330.910424, tmp))>>>(x>>>(-1947835558)))^x)+(x*x)))))));
+  assertEquals(2032826546, x |= (tmp = 2032826546.819327, tmp));
+  assertEquals(3408404827.14316, x += (tmp = 1375578281.1431599, tmp));
+  assertEquals(258183922.14315987, x %= (tmp = 350024545, tmp));
+  assertEquals(479694848, x <<= (tmp = -481187157, tmp));
+  assertEquals(-2147483648, x <<= (((tmp = -2956588045.472398, tmp)>>>(((tmp = -1838455399.1775856, tmp)&(((((tmp = -637547, tmp)/x)&(x^((-44876328.1767962)+(((-2059598286)-(1071496688))%(tmp = -1492254402, tmp)))))-(x%x))*(x|x)))>>(1226250760)))<<x));
+  assertEquals(-2288163338.9020815, x -= (140679690.9020816));
+  assertEquals(4954833118513997000, x *= (-2165419327.4906025));
+  assertEquals(1578331238, x ^= (-2410854298.2270393));
+  assertEquals(-810627292, x += (-2388958530));
+  assertEquals(-810627292, x ^= ((1495296640.4087524)/(tmp = 1561790291, tmp)));
+  assertEquals(657116606535253200, x *= x);
+  assertEquals(0.675840332689047, x %= (((-1816548473)^(((tmp = -151918689.19451094, tmp)|(1819911186.535233))/((((((1514297447)+(tmp = 856485190.9684253, tmp))&(((1809369464.4363992)<<(493538496))*x))+((x*(x>>(x&(tmp = 222293461, tmp))))>>>(((784519621)|x)^((-580766922)>>(tmp = -947264116, tmp)))))>>>((((2794210354.22964)>>>(((2896952532.0183973)*((x+(tmp = -1813175940, tmp))<<(tmp = -1302618293, tmp)))&x))>>(x-(((x|((1456466890.1952953)*x))^(-169979758.19158387))-(x-x))))>>x))&(tmp = 2671604078.3026733, tmp))))/(-1701675745)));
+  assertEquals(0.675840332689047, x %= ((tmp = 2421871143, tmp)^x));
+  assertEquals(NaN, x %= ((((tmp = 1175526323.433271, tmp)+(tmp = 2813009575.952405, tmp))%((tmp = -3112133516.3303423, tmp)&x))&((((((-424329392)^(tmp = 1430146361, tmp))+x)-(1533557337.268306))%((tmp = -3117619446, tmp)-(-3127129232)))>>>x)));
+  assertEquals(NaN, x += x);
+  assertEquals(0, x >>>= ((1710641057.7325037)%(104961723.56541145)));
+  assertEquals(0, x <<= (tmp = -970072906, tmp));
+  assertEquals(0, x *= (87768668));
+  assertEquals(-1464968122, x ^= (tmp = -1464968122, tmp));
+  assertEquals(-1467983895, x ^= ((tmp = -1204896021, tmp)>>>(((91792661)&(x>>>(((-2364345606)>>>x)*x)))+x)));
+  assertEquals(2.991581508270506, x /= (-490704963.5591147));
+  assertEquals(0, x >>>= x);
+  assertEquals(0, x >>= ((tmp = 639854873, tmp)%(tmp = 743486160.3597239, tmp)));
+  assertEquals(0, x <<= (tmp = 1045577245.3403939, tmp));
+  assertEquals(0, x >>= ((tmp = -1932462290, tmp)|(tmp = 1629217987, tmp)));
+  assertEquals(517617438, x ^= ((tmp = 2737789043, tmp)%(tmp = -2220171604.135681, tmp)));
+  assertEquals(126371, x >>>= ((tmp = 205210223.69909227, tmp)-(tmp = 598118404, tmp)));
+  assertEquals(918548455, x |= ((918228734.8363427)+(x+x)));
+  assertEquals(918548455, x |= ((tmp = 599828198, tmp)>>((tmp = -851081330, tmp)|(tmp = -1152596996.8443217, tmp))));
+  assertEquals(918548443.7739062, x -= ((tmp = 1497642976.2260938, tmp)%(x>>(tmp = -548469702.5849569, tmp))));
+  assertEquals(0.7739062309265137, x %= (x&x));
+  assertEquals(2317939163.8239403, x *= (tmp = 2995116296, tmp));
+  assertEquals(1014415360, x <<= (-279972114));
+  assertEquals(0, x &= ((296810932)/(x*(tmp = -2750499950, tmp))));
+  assertEquals(0, x *= (x%((126285451.05086231)>>>(x*(tmp = -2789790532, tmp)))));
+  assertEquals(0, x >>>= ((975695102.5771483)%(x-((-1011726540)-((tmp = 2223194882, tmp)/x)))));
+  assertEquals(-1747794584, x |= (-1747794584.3839395));
+  assertEquals(-543544679, x %= (tmp = -1204249905, tmp));
+  assertEquals(-543544679, x %= (-881024001));
+  assertEquals(1, x /= x);
+  assertEquals(-1879376393, x |= ((tmp = 161643764, tmp)|(tmp = 2281346499.9084272, tmp)));
+  assertEquals(1.321124264431369, x /= (-1422558379.7061746));
+  assertEquals(1, x >>>= (x&(tmp = -963118950.4710281, tmp)));
+  assertEquals(3, x ^= ((x+x)/x));
+  assertEquals(1, x /= x);
+  assertEquals(1, x &= (2090796073));
+  assertEquals(-1284301873, x ^= (((-11041168.146357536)+(tmp = -1273260707.8134556, tmp))+x));
+  assertEquals(292559045, x &= (x&((-2401110739)^((tmp = 630802904, tmp)^(((1012634447.0346229)+x)%((tmp = -1240091095, tmp)%(x/(-1483936527))))))));
+  assertEquals(0, x %= x);
+  assertEquals(0, x /= (tmp = 613145428.3653506, tmp));
+  assertEquals(0, x /= ((x-(tmp = 3116638456, tmp))*(-973300716)));
+  assertEquals(0, x %= (tmp = -1794741286.0464535, tmp));
+  assertEquals(0, x &= x);
+  assertEquals(0, x >>= (-551370105.0746605));
+  assertEquals(-1471996874, x ^= ((2822970422.2331414)-x));
+  assertEquals(-277914313, x |= (tmp = -818980601.2544096, tmp));
+  assertEquals(-34, x >>= x);
+  assertEquals(305422768, x -= (-305422802));
+  assertEquals(-2406146240, x += (tmp = -2711569008, tmp));
+  assertEquals(1073745408, x &= (tmp = -3046625618, tmp));
+  assertEquals(1073745408, x <<= ((-1234108306.7646303)<<((-233519302)|x)));
+  assertEquals(1073745408, x %= (tmp = 1898831268, tmp));
+  assertEquals(1073745408, x <<= (((tmp = 3089406038, tmp)/x)&(-2960027680)));
+  assertEquals(65536, x >>>= (2858188366));
+  assertEquals(128, x >>>= ((-2640257239.857275)%((tmp = -3185405235.3177376, tmp)*x)));
+  assertEquals(128, x >>>= x);
+  assertEquals(128, x -= (x&(x-(tmp = -247588018, tmp))));
+  assertEquals(81616906825.07776, x *= (tmp = 637632084.57092, tmp));
+  assertEquals(78860097686.07776, x -= (((1507215684)^((709254783)+(((x<<x)*((-2890828152.667641)%(2537817529.2041526)))^x)))+(3114024487)));
+  assertEquals(-2920545695.721283, x += (((tmp = -2555437435, tmp)>>>x)-((2920546109.72129)+x)));
+  assertEquals(-2879412281.721283, x += ((-1662428756)>>>(tmp = -1928491386.6926208, tmp)));
+  assertEquals(67403845, x &= (tmp = 2921644117, tmp));
+  assertEquals(16850961, x >>>= (((-1039328365)>>>(tmp = -768615112, tmp))<<((1037261855)*(tmp = -2906902831.4797926, tmp))));
+  assertEquals(0, x ^= x);
+  assertEquals(0, x *= ((-2729056530)/((-1776175111)%(1493002300.4604707))));
+  assertEquals(0, x *= (tmp = 370696035.22912216, tmp));
+  assertEquals(0, x ^= x);
+  assertEquals(0, x |= ((((((tmp = -1541196993, tmp)^x)/(854730380.1799632))/(2879117705.492209))+((((-2892068577)^(-2460614446.1044483))>>>((743413943)<<(-1285280084.4220598)))/(tmp = -1719994579.5141463, tmp)))%(((((tmp = 2522797851.088227, tmp)<<(tmp = 2257160597.1538725, tmp))/(-680406007))&((x>>>(tmp = -260350730, tmp))^(tmp = 1920522110.852598, tmp)))>>(-697620442))));
+  assertEquals(0, x &= x);
+  assertEquals(-591399642.958673, x += (x-(tmp = 591399642.958673, tmp)));
+  assertEquals(27, x >>>= (tmp = -726721317.2109983, tmp));
+  assertEquals(-2043736843, x -= (2043736870));
+  assertEquals(-3991674, x >>= (tmp = 1098126089, tmp));
+  assertEquals(-997919, x >>= ((x%(((x*(((-1497329257.1781685)%(2334511329.2690516))/(-3072526140.6635056)))+(-1843998852))-(tmp = 240300314.34070587, tmp)))+(714080860.6032693)));
+  assertEquals(-0, x %= x);
+  assertEquals(NaN, x /= x);
+  assertEquals(0, x >>= (tmp = 538348328.5363884, tmp));
+  assertEquals(0, x *= (800317515));
+  assertEquals(0, x -= x);
+  assertEquals(0, x >>= (984205514));
+  assertEquals(857282491, x += (tmp = 857282491, tmp));
+  assertEquals(587792897, x &= (tmp = 2951307845.164059, tmp));
+  assertEquals(595301269, x |= (tmp = 24285588.90314555, tmp));
+  assertEquals(1190602538, x += x);
+  assertEquals(0, x -= x);
+  assertEquals(-442423060, x |= ((x^((x-(tmp = 2342497475.637024, tmp))%(-1900074414.7678084)))|((tmp = 1932380130, tmp)%(x%(2291727569.817062)))));
+  assertEquals(-442423060, x %= (((tmp = 703479475.545413, tmp)>>(x-x))<<(2435723056.753845)));
+  assertEquals(1, x /= x);
+  assertEquals(0, x >>= x);
+  assertEquals(-1265317851, x |= (tmp = -1265317851, tmp));
+  assertEquals(-2, x >>= (-2015895906.8256726));
+  assertEquals(-0, x %= x);
+  assertEquals(-0, x %= (((1219237746)+(284683029))*(((tmp = 2288119628, tmp)|(-404658161.2563329))*(-265228691.74142504))));
+  assertEquals(1039509109, x -= (-1039509109));
+  assertEquals(2079018218, x += x);
+  assertEquals(-1979.9362673719077, x /= ((3219723500)>>x));
+  assertEquals(-62, x >>= ((x/(326466691))*(tmp = -607654070, tmp)));
+  assertEquals(-45, x |= (tmp = -2954888429.549882, tmp));
+  assertEquals(-1180929712, x &= (3114037588.570232));
+  assertEquals(815550480, x &= (-2302684143.3378315));
+  assertEquals(815550480, x %= (-2177479570));
+  assertEquals(815550480, x %= (tmp = 2895822167, tmp));
+  assertEquals(815550480, x %= (-1247621230.5438688));
+  assertEquals(283929811, x -= ((tmp = 251831053.17096448, tmp)|((tmp = 1140463506.004994, tmp)+(tmp = -743224673.546309, tmp))));
+  assertEquals(1825767424, x <<= (((tmp = 1732353599, tmp)^(tmp = 658726044, tmp))>>>((-2827889370.932477)%(tmp = 1950139204.3291233, tmp))));
+  assertEquals(1828450414, x |= (tmp = 1618538606, tmp));
+  assertEquals(0, x <<= (-2411670689.045702));
+  assertEquals(0, x <<= (-27744888.428537607));
+  assertEquals(-0, x /= (tmp = -1597552450, tmp));
+  assertEquals(0, x >>>= (((2165722776.7220936)>>>(tmp = 1233069931, tmp))>>>(-1120420811)));
+  assertEquals(-0, x *= ((tmp = -1505252656, tmp)>>((((3035637099.6156535)&((467761577.7669761)>>(-361034537)))^(tmp = -2347994840.6541123, tmp))*(tmp = -2191739821, tmp))));
+  assertEquals(0, x &= (795727404.0738752));
+  assertEquals(-0, x *= (tmp = -3125944685.3991394, tmp));
+  assertEquals(-0, x *= (x&x));
+  assertEquals(0, x >>= ((tmp = -2045709233, tmp)^x));
+  assertEquals(NaN, x /= (x>>(x/(3102894071))));
+  assertEquals(NaN, x += ((tmp = 2149079756.8941655, tmp)-(tmp = 810121645.305179, tmp)));
+  assertEquals(0, x >>>= (-859842989));
+  assertEquals(0, x >>>= (tmp = 2530531143.9369526, tmp));
+  assertEquals(0, x >>= (((-932981419.6254237)|(tmp = 1591591715, tmp))>>>(x+((3149795006)>>>(tmp = 613352154, tmp)))));
+  assertEquals(-4294967295, x -= ((((-2289331668)%(-282648480.0078714))>>(-1373720705.5142756))>>>((tmp = 15511563.517014384, tmp)/(360279080))));
+  assertEquals(1, x &= x);
+  assertEquals(0, x >>= (x^(-2791872557.5190563)));
+  assertEquals(0, x &= ((tmp = 336466956.7847167, tmp)>>((1235728252.053619)|(x<<((1828176636.13488)%x)))));
+  assertEquals(-0, x *= (-364042830.8894656));
+  assertEquals(0, x >>>= x);
+  assertEquals(-1675298680, x |= ((2323049541.321387)+(296619075)));
+  assertEquals(-0, x %= x);
+  assertEquals(-1583048579.4420977, x += (-1583048579.4420977));
+  assertEquals(0, x -= x);
+  assertEquals(-2, x ^= ((603171992.0545617)/(((-271888695.718297)%(tmp = -400159585, tmp))^((((tmp = 1536123971, tmp)-(tmp = -2310418666.6243773, tmp))|((tmp = 2242779597.1219435, tmp)<<(tmp = 1758127684.4745512, tmp)))/x))));
+  assertEquals(-2, x &= (x&x));
+  assertEquals(0, x &= ((tmp = -1098806007.4049063, tmp)/(((2862384059.3229523)/((((tmp = -92960842, tmp)-(x>>(tmp = 1244068344.2269042, tmp)))&x)*(tmp = -1919148313, tmp)))<<(-2486665929))));
+  assertEquals(0, x &= x);
+  assertEquals(-1441272634.582818, x -= (1441272634.582818));
+  assertEquals(-3, x >>= (tmp = 3186393693.7727594, tmp));
+  assertEquals(-1206855850, x ^= (((tmp = 607979495.303539, tmp)-(tmp = -2480131951, tmp))^(x*((tmp = 1324153477, tmp)/((1248126288)+(x|(1917331780.0741704)))))));
+  assertEquals(-1206855853, x ^= (x>>>(653288765.1749961)));
+  assertEquals(-1206857725, x &= (3149461539.6019173));
+  assertEquals(3088109571, x >>>= (x*(x<<(tmp = 1543540084, tmp))));
+  assertEquals(536903680, x &= (tmp = 644851760, tmp));
+  assertEquals(536903674.312194, x += (((-3183290076)-((tmp = 40738191.12097299, tmp)-x))/((x>>>(3151371851.9408646))^(tmp = 472698205.22445416, tmp))));
+  assertEquals(2127424750.0506563, x -= (tmp = -1590521075.7384624, tmp));
+  assertEquals(2127424750.0506563, x %= (tmp = 3027273433.361373, tmp));
+  assertEquals(0, x >>= (x>>(1445204441.702043)));
+  assertEquals(NaN, x %= (x<<x));
+  assertEquals(0, x ^= ((tmp = -2903841152.136344, tmp)-(x%(2938662860))));
+  assertEquals(0, x <<= (x<<x));
+  assertEquals(0, x >>>= (tmp = -979481631.33442, tmp));
+  assertEquals(0, x >>= x);
+  assertEquals(0, x &= (((x%((((((tmp = 1657446354.6820035, tmp)>>(-1916527001.2992697))/x)>>(tmp = 1450467955, tmp))&(277676820))+(x/(-945587805))))/((tmp = -690095354, tmp)^x))+(tmp = -2651195021, tmp)));
+  assertEquals(0, x <<= (752343428.2934296));
+  assertEquals(0, x /= (tmp = 3022310299, tmp));
+  assertEquals(0, x >>= (x%((388245402)>>>x)));
+  assertEquals(NaN, x %= x);
+  assertEquals(NaN, x %= ((tmp = 1205123529.8649468, tmp)>>>(-2848300932)));
+  assertEquals(0, x >>= ((x>>>x)<<(tmp = 487841938, tmp)));
+  assertEquals(0, x *= (((273436000.9463471)|(tmp = 141134074.27978027, tmp))^(tmp = 1220326800.7885802, tmp)));
+  assertEquals(1525600768, x |= (((x^(-2674777396))-(tmp = 1966360716.3434916, tmp))<<(794782595.9340223)));
+  assertEquals(761927595, x %= (tmp = -763673173, tmp));
+  assertEquals(1.1353588586934338, x /= ((x&((-1897159300.4789193)*(-348338328.0939896)))&(978680905.6470605)));
+  assertEquals(8.631173314966319e-10, x /= (1315416592));
+  assertEquals(0, x >>= ((tmp = -2581239435, tmp)-((-628818404.1122074)<<x)));
+  assertEquals(0, x -= x);
+  assertEquals(0, x *= (2925158236));
+  assertEquals(0, x /= (x+(tmp = 1405531594.0181243, tmp)));
+  assertEquals(0, x *= (2712022631.230831));
+  assertEquals(0, x >>= (tmp = 80518779.81608999, tmp));
+  assertEquals(1953477932.8046472, x += (tmp = 1953477932.8046472, tmp));
+  assertEquals(1953477932, x >>= (tmp = 3025539936, tmp));
+  assertEquals(1953477932, x -= ((-2675119685.8812313)>>(x/(-1808264410.9754841))));
+  assertEquals(1292620430, x += ((-660857502)%((((tmp = -698782819, tmp)%(tmp = 2847304199, tmp))<<(-2423443217.1315413))+x)));
+  assertEquals(78895, x >>>= x);
+  assertEquals(2, x >>= x);
+  assertEquals(2, x <<= (tmp = 1313641888.8301702, tmp));
+  assertEquals(1857416935.2532766, x += (tmp = 1857416933.2532766, tmp));
+  assertEquals(-1677721600, x <<= (tmp = -2482476902, tmp));
+  assertEquals(309226853.62854385, x -= (tmp = -1986948453.6285439, tmp));
+  assertEquals(33965156, x &= (2409088742));
+  assertEquals(Infinity, x /= (x-(x<<((x/(tmp = -3106546671.536726, tmp))/((tmp = 2695710176, tmp)-((((-2102442864)&(857636911.7079853))/x)%(-65640292)))))));
+  assertEquals(1270005091, x |= (tmp = 1270005091.0081215, tmp));
+  assertEquals(1270005091, x %= (tmp = -1833876598.2761571, tmp));
+  assertEquals(158750636, x >>>= x);
+  assertEquals(-1000809106.0879555, x -= (tmp = 1159559742.0879555, tmp));
+  assertEquals(72400936, x &= ((2448271389.3097963)%(tmp = 1517733861, tmp)));
+  assertEquals(282816, x >>= x);
+  assertEquals(282816, x %= (tmp = 3192677386, tmp));
+  assertEquals(0.00021521351827207216, x /= (1314118194.2040696));
+  assertEquals(Infinity, x /= (((tmp = 2822091386.1977024, tmp)&x)%(tmp = -3155658210, tmp)));
+  assertEquals(NaN, x %= (-359319199));
+  assertEquals(0, x >>>= (((tmp = -2651558483, tmp)-(x<<(tmp = 2537675226.941645, tmp)))<<(tmp = 667468049.0240343, tmp)));
+  assertEquals(-0, x *= (tmp = -2827980482.12998, tmp));
+  assertEquals(-0, x %= (((tmp = -689972329.3533998, tmp)>>>x)|(tmp = -7488144, tmp)));
+  assertEquals(0, x >>>= x);
+  assertEquals(0, x |= x);
+  assertEquals(-2410373675.2262926, x -= (2410373675.2262926));
+  assertEquals(1840423, x >>= ((-1081642113)^x));
+  assertEquals(-4829451429403412, x *= (-2624098606.35485));
+  assertEquals(-94552231, x %= (tmp = -97015883, tmp));
+  assertEquals(-94433287, x ^= (((tmp = -2297735280, tmp)&(((tmp = 2261074987.7072973, tmp)%((((2565078998)^(-2573247878))|x)|(((tmp = -2120919004.7239416, tmp)>>(tmp = -579224101, tmp))>>>(1905808441))))*(x|(3149383322))))>>(542664972)));
+  assertEquals(0, x ^= (x<<(tmp = -3112569312, tmp)));
+  assertEquals(0, x <<= (-2141934818.7052917));
+  assertEquals(0, x >>= (tmp = -2539525922, tmp));
+  assertEquals(-434467613, x ^= (tmp = -434467613, tmp));
+  assertEquals(-274792709, x |= (1233452601.462551));
+  assertEquals(-274726917, x |= (-2130333750));
+  assertEquals(-272629761, x |= (-1516071602.5622227));
+  assertEquals(-272629761, x |= ((tmp = 3012131694, tmp)&((tmp = -2595342375.8674774, tmp)-((tmp = -2710765792, tmp)>>>((x-(tmp = 2397845540, tmp))+(2496667307))))));
+  assertEquals(-4194305, x |= (1343705633.165825));
+  assertEquals(4190207, x >>>= ((tmp = 276587830, tmp)*((tmp = -1517753936, tmp)>>x)));
+  assertEquals(0, x >>= (x|((2247486919)-((-1664642412.4710495)*((((tmp = -358185292.17083216, tmp)-(tmp = -1472193444, tmp))*(tmp = 2699733752, tmp))&((x|(x<<(1137610148.1318119)))>>(((375089690.8764564)*x)&(tmp = 859788933.9560187, tmp))))))));
+  assertEquals(0, x %= (3080673960));
+  assertEquals(0, x >>>= (1328846190.1963305));
+  assertEquals(1249447579, x |= (-3045519717.580775));
+  assertEquals(-0.8743931060971377, x /= (-1428931187));
+  assertEquals(1, x |= ((tmp = -1756877535.7557893, tmp)/((-142900015.93200803)<<(1414557031.347334))));
+  assertEquals(759627265, x ^= (759627264.0514802));
+  assertEquals(741823, x >>= (1106391210));
+  assertEquals(610451, x &= ((x>>>((919849416)+((tmp = -427708986, tmp)^((x%x)|(tmp = -2853100288.932063, tmp)))))*x));
+  assertEquals(372650423401, x *= x);
+  assertEquals(410404493, x >>>= ((((-1425086765)>>>x)>>((2813118707.914771)>>(-424850240)))^x));
+  assertEquals(120511585729013, x *= ((tmp = -1889454669, tmp)>>>x));
+  assertEquals(120513295294304.22, x -= (tmp = -1709565291.2115698, tmp));
+  assertEquals(6164, x >>>= ((2244715719.397763)^(tmp = -741235818.6903033, tmp)));
+  assertEquals(937572790.468221, x -= (tmp = -937566626.468221, tmp));
+  assertEquals(937572790, x |= ((2129102867.156146)*(x%x)));
+  assertEquals(32, x &= ((2700124055.3712993)>>>((1977241506)>>>(-2915605511))));
+  assertEquals(32, x %= (tmp = -2513825862, tmp));
+  assertEquals(0, x <<= (-1379604802));
+  assertEquals(0, x >>>= (tmp = -1033248759, tmp));
+  assertEquals(-1151517050, x ^= (3143450246));
+  assertEquals(-180577, x |= ((738373819.4081701)^(-357134176)));
+  assertEquals(-0, x %= x);
+  assertEquals(-2086887759, x |= (tmp = 2208079537, tmp));
+  assertEquals(-2, x >>= (1460216478.7305799));
+  assertEquals(-2, x %= ((-1979700249.0593133)^(-3156454032.4790583)));
+  assertEquals(-256, x <<= ((1810316926)>>>(tmp = 414362256, tmp)));
+  assertEquals(-1, x >>= (((((((-1616428585.595561)*((tmp = 2574896242.9045777, tmp)|(86659152.37838173)))>>(((tmp = 2476869361, tmp)&((x+((tmp = -2445847462.1974697, tmp)>>(tmp = -1960643509.5255682, tmp)))+(x|(((((2231574372.778028)|(tmp = 1824767560, tmp))>>>((1108035230.2692142)|(tmp = 2354035815, tmp)))/((tmp = -2602922032, tmp)>>(-925080304.7681987)))-x))))-(x>>x)))>>>((tmp = 751425805.8402164, tmp)|(tmp = 1165240270.3437088, tmp)))-x)*(2870745939))-(x>>>((tmp = 2986532631.405425, tmp)>>>(((tmp = 2547448699, tmp)+(((((x<<(((((-2756908638.4197435)>>>(3134770084))-(-1147872642.3756688))%(x*(tmp = -282198341.6600039, tmp)))+(-770969864.2055655)))+((-2725270341)^x))/(-3093925722))>>(x&x))>>((tmp = -2705768192, tmp)>>>(((tmp = 577253091.6042917, tmp)/(((x&(((((x+x)>>>(-1000588972))/(x&(717414336)))^(tmp = 428782104.21504414, tmp))>>>(1084724288.953223)))%(tmp = -2130932217.4562194, tmp))&x))-(-286367389)))))+((x>>(tmp = 2001277117, tmp))>>((tmp = 1028512592, tmp)^((tmp = 2055148650, tmp)+((tmp = 1490798399, tmp)/(tmp = -2077566434.2678986, tmp))))))))));
+  assertEquals(-1, x |= (tmp = 1542129482, tmp));
+  assertEquals(-671816743, x &= (tmp = -671816743.9111726, tmp));
+  assertEquals(-1840333080, x -= (1168516337));
+  assertEquals(-1755382023, x |= ((((tmp = 2625163636.0142937, tmp)>>>((tmp = 1534304735, tmp)^x))-(tmp = -1959666777.9995313, tmp))%x));
+  assertEquals(-1750421896, x += (x>>>(tmp = -1364828055.1003118, tmp)));
+  assertEquals(-72864007, x %= (tmp = 239651127, tmp));
+  assertEquals(-72863956, x -= (((tmp = -1103261657.626319, tmp)*((tmp = 2789506613, tmp)+((tmp = 2294239314, tmp)>>>(2588428607.5454817))))>>x));
+  assertEquals(-170337477, x -= (tmp = 97473521, tmp));
+  assertEquals(-170337477, x |= (((tmp = 246292300.58998203, tmp)/(((tmp = -2664407492, tmp)|((-2416228818)^(tmp = 909802077, tmp)))%(tmp = 532643021.68109465, tmp)))/(tmp = 1015597843.8295637, tmp)));
+  assertEquals(1, x >>>= (((tmp = -2247554641.7422867, tmp)/(1186555294))%(tmp = -785511772.3124621, tmp)));
+  assertEquals(1188939891.668705, x -= (tmp = -1188939890.668705, tmp));
+  assertEquals(1188939891, x &= x);
+  assertEquals(1188413555, x &= (((tmp = -372965330.5709038, tmp)%(((tmp = 3108909487, tmp)|(x^(-1056955571.9951684)))^(-1549217484.009048)))/(x>>>(1403428437.9368362))));
+  assertEquals(-0.7343692094664643, x /= (-1618278026.4758227));
+  assertEquals(0, x -= x);
+  assertEquals(0, x &= (-2701762139.7500515));
+  assertEquals(0, x >>>= (((-1692761485.2299166)^x)+(tmp = -1221349575.938864, tmp)));
+  assertEquals(0, x <<= ((2148160230)<<x));
+  assertEquals(0, x <<= (((x<<(-740907931.38363))&(tmp = -930960051.6095045, tmp))>>(x/((tmp = -1921545150.1239789, tmp)/(-3015379806)))));
+  assertEquals(0, x <<= x);
+  assertEquals(NaN, x /= (x|x));
+  assertEquals(0, x >>= (tmp = -2265988773, tmp));
+  assertEquals(-0, x *= (((x<<(-928153614))<<(-989694208))^(2544757713.481016)));
+  assertEquals(0, x >>= ((tmp = 578009959.5299993, tmp)>>x));
+  assertEquals(0, x /= ((((tmp = 412689800.0431709, tmp)&(1630886276))*(tmp = 2028783080.7296097, tmp))/x));
+  assertEquals(0, x |= ((((x*(-2197198786))>>((2719887264.761987)<<(tmp = 2253246512, tmp)))-(tmp = -150703768.07045603, tmp))/(((-3160098146)%(((((1486098047.843547)>>(((tmp = -593773744.1144242, tmp)&(x<<(2651087978)))|((-680492758.930413)>>(tmp = 88363052.13662052, tmp))))<<x)<<(tmp = 2232672341, tmp))/((x<<x)&(((((348589117.64135563)<<(-1010050456.3097556))^(x/(tmp = -2282328795, tmp)))-(tmp = 1653716293, tmp))-((3157124731)/((tmp = 3007369535.341745, tmp)%(tmp = -2246556917, tmp)))))))+x)));
+  assertEquals(0, x >>= ((1935211663.5568764)>>(x-(tmp = 2116580032, tmp))));
+  assertEquals(-1725272693, x ^= (tmp = -1725272693, tmp));
+  assertEquals(313683, x >>>= (-1782632531.2877684));
+  assertEquals(0.009772287443565642, x /= (tmp = 32099240, tmp));
+  assertEquals(-647945916.9902277, x += (-647945917));
+  assertEquals(3647021380, x >>>= ((((((((2470411371.688199)<<x)>>x)-(x>>>((tmp = 1750747780, tmp)/x)))-x)<<(tmp = -2666186351.695101, tmp))^(((tmp = 2749205312.6666174, tmp)%x)&(2069802830.360536)))<<(tmp = 6051917.9244532585, tmp)));
+  assertEquals(-647939220, x |= ((x>>>((tmp = -2980404582.794245, tmp)>>>(-996846982)))^x));
+  assertEquals(-572178450, x |= ((-800571300.3277931)+(tmp = 2084365671, tmp)));
+  assertEquals(1172311208, x &= (x&((tmp = -1207487657.8953774, tmp)^x)));
+  assertEquals(12176516458994, x += ((((tmp = -1534997221, tmp)%(412142731))*((tmp = 2958726303, tmp)>>(1489169839)))+(((-574726407.2051775)>>>(((1772885017)<<(947804536.9958035))>>(-2406844737)))>>x)));
+  assertEquals(-1480065024, x <<= x);
+  assertEquals(-1736999042.227129, x += (tmp = -256934018.22712898, tmp));
+  assertEquals(-1338699394, x ^= ((((((x%(((tmp = -2551168455.222048, tmp)|(3213507293.930222))/((-1559278033)>>((tmp = 3107774495.3698573, tmp)-(2456375180.8660913)))))*((x*(tmp = 1088820004.8562922, tmp))+((tmp = 1850986704.9836102, tmp)%(tmp = -1226590364, tmp))))*(1786192008))&(((2193303940.310299)%(tmp = 1041726867.0602217, tmp))|((2210722848)/((-1293401295.6714435)&((tmp = 3052430315, tmp)|x)))))>>>(tmp = -2028014470.1524236, tmp))+(((1695818039.0383925)<<((1669068145)*(-2746592133.899276)))<<(tmp = 519092169, tmp))));
+  assertEquals(-334674849, x >>= (1170377794));
+  assertEquals(-10214, x >>= ((tmp = 1074704264.3712895, tmp)>>>((tmp = -1200860192, tmp)^((tmp = 539325023.4101218, tmp)*((tmp = -588989295, tmp)|x)))));
+  assertEquals(1384169472, x &= (1384171140));
+  assertEquals(1384169472, x >>>= ((tmp = -2161405973.830981, tmp)*(tmp = 2054628644, tmp)));
+  assertEquals(1610140972, x |= (527961388));
+  assertEquals(1073273198, x += ((tmp = -259650225.71344328, tmp)&(tmp = -344359694, tmp)));
+  assertEquals(65507, x >>= ((x<<((tmp = 2925070713.5245204, tmp)%(x+((tmp = -1229447799, tmp)/(((x/(x|(((-2337139694)|((((((2996268529.7965417)&x)%(((tmp = -1088587413, tmp)>>(-1384104418.90339))>>((tmp = -1643984822.3946526, tmp)+x)))%(((1118125268.4540217)-((((-1975051668.6652594)-(-704573232))+((tmp = 1674952373, tmp)/(tmp = 1321895696.0062659, tmp)))*(tmp = 1820002533.2021284, tmp)))>>>(tmp = -583960746.9993203, tmp)))|((tmp = -2577675508.550925, tmp)&x))/(tmp = 1459790066, tmp)))/(((((1051712301.7804044)&(tmp = -2726396354, tmp))^(tmp = 263937254.18934345, tmp))+(((x^x)*(((tmp = -2289491571, tmp)+x)%(-2239181148)))&x))>>(tmp = -1743418186.3030887, tmp)))))/(tmp = 1475718622, tmp))<<x)))))|(x&((((tmp = -2934707420, tmp)<<x)/x)^(1022527598.7386684)))));
+  assertEquals(2047, x >>= (x-(tmp = 2300626270, tmp)));
+  assertEquals(8384512, x <<= (tmp = -1917680820, tmp));
+  assertEquals(0, x <<= (2393691134));
+  assertEquals(0, x >>= x);
+  assertEquals(649995936.5853252, x -= (tmp = -649995936.5853252, tmp));
+  assertEquals(649995936, x &= x);
+  assertEquals(-0.33672017582945424, x /= (tmp = -1930374188, tmp));
+  assertEquals(-0.33672017582945424, x += (x&((1208055031)^(-2761287670.968586))));
+  assertEquals(0, x |= x);
+  assertEquals(0, x <<= ((-2038368978)/x));
+  assertEquals(0, x >>= (x&((tmp = 2481378057.738218, tmp)&(x+(1172701643)))));
+  assertEquals(0, x <<= ((x*(((((((tmp = 70690601.3046323, tmp)&(((((((((((x+(x+(x^(3118107461))))<<(264682213.41888392))&(tmp = -709415381.8623683, tmp))%(((((-1840054964)>>>(tmp = -405893120.89603686, tmp))|((-625507229)^(3128979265)))>>(x>>((tmp = -2480442390, tmp)*((x>>(tmp = -421414980.88330936, tmp))>>>((tmp = 1850868592, tmp)&(-2948543832.879225))))))|((2986545185)&((tmp = -1947550706, tmp)%(((tmp = 2590238422.1414256, tmp)/(((tmp = -361038812, tmp)>>x)|(((tmp = 1798444068, tmp)|((x&((tmp = -3104542069, tmp)-x))*((tmp = -1158658918, tmp)+((tmp = 2777031040.5552707, tmp)<<(-2816019335.9008327)))))<<x)))/(((2287795988.231702)/x)/(((-2588712925)>>>(2521189250))*((tmp = -2533527920, tmp)+(tmp = 1762281307.2162101, tmp)))))))))/x)/(tmp = 1047121955.5357032, tmp))|(((-121292251)<<(x^(x-(tmp = 1420006180, tmp))))%((-2278606219)>>>(((tmp = -1412487726, tmp)&(((((tmp = 253596554.16016424, tmp)/(tmp = 2083376247.0079951, tmp))^(x^((1549116789.8449988)>>>((((-1844170084)^(tmp = 1886066422, tmp))&x)<<(34918329)))))^(tmp = -440805555.3369155, tmp))-x))%(-1936512969)))))+(2911511178.4035435))|(1012059391))|(x>>>(tmp = -2551794626.158037, tmp)))+((2926596072.210515)/(tmp = -280299595.0450909, tmp))))&((tmp = 1501086971, tmp)^(tmp = 2114076983, tmp)))-((-1679390574.1466925)-(941349044)))-((x>>x)>>((-2600539474.2033434)+(tmp = 2567056503.9079475, tmp))))*(tmp = 1285896052, tmp))%(((tmp = 1191465410.7595167, tmp)>>((tmp = -2857472754, tmp)%x))>>>(((tmp = 1960819627.6552541, tmp)&(-2651207221.127376))*((((-687312743)+((x>>x)<<x))|((((((1549588195)*((tmp = 2733091019, tmp)^((527322540)<<(x>>x))))%(tmp = -2063962943, tmp))*x)*(734060600))&(-3049417708)))+(((((1084267726)+((x|x)^((tmp = -1917070472.4858549, tmp)%((690016078.9375831)*x))))%((((((tmp = -2091172769, tmp)%(2532365378))>>>(-871354260))/(tmp = 254167019.07825458, tmp))&(1330216175.9871218))>>(tmp = 1931099207, tmp)))^(-1116448185.2618852))>>((961660080.8135855)/x)))))))>>>(-1486048007.7053368)));
+  assertEquals(0, x >>= x);
+  assertEquals(0, x %= (tmp = -1202200444.6506357, tmp));
+  assertEquals(-0, x *= (-527500796.4145117));
+  assertEquals(0, x >>= (tmp = -2082822707, tmp));
+  assertEquals(0, x *= ((-1882398459.290778)>>>x));
+  assertEquals(0, x &= (x/(tmp = -1569332286.392817, tmp)));
+  assertEquals(-390169607, x |= (-390169607.11600184));
+  assertEquals(-780339214, x += x);
+  assertEquals(-780339214, x %= (2765959073));
+  assertEquals(-5954, x >>= (tmp = -1900007055, tmp));
+  assertEquals(743563420, x &= ((((-1520146483.5367205)|(-2075330284.3762321))-(tmp = -2263151872, tmp))%(-1264641939.957402)));
+  assertEquals(1487126840, x += (x>>>(((x+((tmp = -1263274491, tmp)>>>x))&(470419048.0490037))%(tmp = -2642587112, tmp))));
+  assertEquals(Infinity, x /= (x^x));
+  assertEquals(0, x ^= ((tmp = -1436368543, tmp)+(x/(tmp = -1125415374.3297129, tmp))));
+  assertEquals(0, x += x);
+  assertEquals(0, x <<= x);
+  assertEquals(0, x &= (tmp = 3101147204.2905564, tmp));
+  assertEquals(0, x &= (tmp = 2914487586.606511, tmp));
+  assertEquals(0, x += x);
+  assertEquals(0, x -= (((-1738542908.6138556)&(((x+x)-(tmp = -2801153969, tmp))%(tmp = -1206684064.1477358, tmp)))>>((-2575546469.271897)|(tmp = -2573119106, tmp))));
+  assertEquals(-1468808707, x ^= (tmp = -1468808707, tmp));
+  assertEquals(1357349882, x <<= (tmp = -2808501087.7003627, tmp));
+  assertEquals(-572025862, x |= ((((tmp = -2415486246.573399, tmp)/((tmp = -707895732.4593301, tmp)&x))%((-1960091005.0425267)*(972618070.9166157)))-(1649962343)));
+  assertEquals(327213586796843100, x *= (x%(1337884626)));
+  assertEquals(42991616, x &= (-2905576654.1280055));
+  assertEquals(-26049289585042860, x *= (-605915571.6557121));
+  assertEquals(597809748, x >>= ((362850791.077795)/(tmp = 1222777657.4401796, tmp)));
+  assertEquals(597809748, x |= x);
+  assertEquals(770065246, x -= ((-711227660)|(tmp = -508554506, tmp)));
+  assertEquals(593000483097040500, x *= x);
+  assertEquals(0, x %= x);
+  assertEquals(0, x <<= (317862995.456813));
+  assertEquals(0, x >>= ((tmp = 2518385735, tmp)+((-2973864605.267604)/(-930953312.718833))));
+  assertEquals(1227822411, x ^= (x^(1227822411.8553264)));
+  assertEquals(1090520320, x &= (x+((((-2100097959)>>(x/(tmp = -2002285068, tmp)))/(-364207954.9242482))-((tmp = 2771293106.7927113, tmp)-(tmp = -847237774, tmp)))));
+  assertEquals(1090520320, x >>= (((((2439492849)<<((-2932672756.2578926)*((743648426.7224461)+((2942284935)<<((x/(((tmp = 886289462.6565771, tmp)+(-459458622.7475352))>>(tmp = -785521448.4979162, tmp)))|(tmp = -11630282.877367258, tmp))))))-(tmp = -647511106.9602091, tmp))^x)&x));
+  assertEquals(115944291.48829031, x %= (243644007.12792742));
+  assertEquals(1, x /= x);
+  assertEquals(0, x >>>= ((tmp = -819782567, tmp)%(tmp = 2774793208.1994505, tmp)));
+  assertEquals(0, x >>= (tmp = 721096000.2409859, tmp));
+  assertEquals(0, x &= ((x%x)%x));
+  assertEquals(-0, x *= ((-1670466344)<<x));
+  assertEquals(0, x >>= (-677240844.904707));
+  assertEquals(NaN, x %= (((((-1575993236.6126876)/(-2846264078.9581823))^((((-2220459664)-(((-1809496020)>>>(tmp = -3015964803.4566207, tmp))&x))/(tmp = -3081895596.0486784, tmp))>>>(x&x)))%(x^(-1338943139)))^(x-((((2074140963.2841332)^(tmp = 1878485274, tmp))%(((x/(-2568856967.6491556))^x)<<((x+x)^((((2139002721)|(x<<(-1356174045.840464)))>>x)-(tmp = 2305062176, tmp)))))>>>(((((x<<(tmp = -1663280319.078543, tmp))-((1498355849.4158854)-((-1321681257)>>>(tmp = -1321415088.6152222, tmp))))^(-2266278142.1584673))+(858538943))&((((x-((x|(((tmp = -1576599651, tmp)+((tmp = 1595319586, tmp)&(-2736785205.9203863)))>>((x+((-1856237826)+x))<<(tmp = -1590561854.3540869, tmp))))^(((-41283672.55606127)&(tmp = 2971132248, tmp))+x)))/(-849371349.1667476))%(x*((-1705070934.6892798)>>>x)))<<((2418200640)*x)))))));
+  assertEquals(0, x >>>= (tmp = 664214199.5283061, tmp));
+  assertEquals(0, x <<= ((-2827299151)<<(1815817649)));
+  assertEquals(1405772596, x |= (tmp = 1405772596, tmp));
+  assertEquals(-1483422104, x <<= (-2791499935.6822596));
+  assertEquals(-45271, x >>= (1740128943.4254808));
+  assertEquals(-45271, x <<= ((2072269957)-((tmp = -2553664811.4472017, tmp)*(tmp = -2502730352, tmp))));
+  assertEquals(1192951471.6745887, x -= (-1192996742.6745887));
+  assertEquals(-353370112, x <<= (tmp = -1410280844, tmp));
+  assertEquals(0, x ^= (x%((2754092728)*(-1017564599.1094015))));
+  assertEquals(-2662096003.2397957, x -= (tmp = 2662096003.2397957, tmp));
+  assertEquals(-2587094028.50764, x -= (tmp = -75001974.7321558, tmp));
+  assertEquals(6693055512339889000, x *= x);
+  assertEquals(897526784, x %= (x-((tmp = 897526813, tmp)%(-1525574090))));
+  assertEquals(7011928, x >>= ((-440899641.344357)%x));
+  assertEquals(8382047686388683, x += (x*(1195398423.8538609)));
+  assertEquals(16764095372777366, x += x);
+  assertEquals(16764096859576696, x -= (tmp = -1486799329.7207344, tmp));
+  assertEquals(16764099774187724, x += (2914611029));
+  assertEquals(16764102926624664, x -= (-3152436939.724612));
+  assertEquals(-538220648, x |= x);
+  assertEquals(269110324, x /= (((-2114698894.6014318)/(tmp = 767687453, tmp))>>(623601568.1558858)));
+  assertEquals(256, x >>= x);
+  assertEquals(-293446891, x += (x+(-293447403)));
+  assertEquals(119, x >>>= ((1759400753)>>(2481263470.4489403)));
+  assertEquals(14, x >>= (762849027.89693));
+  assertEquals(16, x += (x&(x>>(1104537666.1510491))));
+  assertEquals(-12499808227.980995, x *= (tmp = -781238014.2488122, tmp));
+  assertEquals(1, x /= x);
+  assertEquals(1, x &= x);
+  assertEquals(0, x >>>= ((tmp = 1513381008, tmp)|(tmp = 1593208075.7259543, tmp)));
+  assertEquals(0, x &= (-788154636.2843091));
+  assertEquals(-0, x /= (tmp = -2124830879, tmp));
+  assertEquals(0, x &= (934237436));
+  assertEquals(0, x |= x);
+  assertEquals(-79370942.97651315, x += (-79370942.97651315));
+  assertEquals(-79370942.97651315, x %= ((tmp = -2683255523, tmp)<<(tmp = 2323123280.287587, tmp)));
+  assertEquals(-79370942, x |= x);
+  assertEquals(0.05861647801688159, x /= (-1354072177.061561));
+  assertEquals(0, x <<= (((((((tmp = 1989257036, tmp)&(tmp = 1565496213.6578887, tmp))&x)&(tmp = -2798643735.905287, tmp))&(2354854813.43784))%(tmp = 1118124748, tmp))<<((tmp = 2453617740, tmp)*(((tmp = 1762604500.492329, tmp)<<(-2865619363))%(((2474193854.640994)|((tmp = 1425847419.6256948, tmp)|(((-1271669386)%((x|((tmp = -2059795445.3607287, tmp)+x))*(x*x)))>>>(tmp = -2997360849.0750895, tmp))))/(tmp = 2326894252, tmp))))));
+  assertEquals(0, x >>>= ((-671325215)/((-727408755.8793397)>>(tmp = 315457854, tmp))));
+  assertEquals(0, x >>= (x&x));
+  assertEquals(0, x <<= ((x/x)>>>(((((x&x)-((x*(((tmp = -2689062497.0087833, tmp)^x)/((-1465906334.9701924)<<(tmp = -349000262, tmp))))*x))%(1630399442.5429945))*x)+((tmp = 605234630, tmp)%(tmp = 2325750892.5065155, tmp)))));
+  assertEquals(0, x |= (x%((x>>(((((tmp = 1622100459, tmp)<<x)&((((((tmp = 2411490075, tmp)<<x)|x)>>((x<<x)-(-2133780459)))/x)&(x+x)))%(x/((((tmp = 580125125.5035453, tmp)>>>(-470336002.1246581))|((tmp = 871348531, tmp)*x))>>(2866448831.23781))))-((2352334552)-(-562797641.6467373))))-(x^(tmp = -681731388, tmp)))));
+  assertEquals(0, x <<= (tmp = -1358347010.3729038, tmp));
+  assertEquals(-260967814, x |= ((tmp = -260967814.45976686, tmp)%(tmp = 1126020255.1772437, tmp)));
+  assertEquals(NaN, x %= ((((tmp = 3176388281, tmp)<<(tmp = 611228283.2600244, tmp))>>>((tmp = 3068009824, tmp)+(tmp = 2482705111, tmp)))>>>((tmp = -750778285.2580311, tmp)>>>x)));
+  assertEquals(0, x <<= (x>>>x));
+  assertEquals(0, x /= (1238919162));
+  assertEquals(0, x >>= (x^x));
+  assertEquals(0, x &= (-2137844801));
+  assertEquals(0, x >>>= (x^(x*(-1774217252))));
+  assertEquals(0, x >>= x);
+  assertEquals(0, x |= x);
+  assertEquals(0, x &= (x<<(tmp = 2791377560, tmp)));
+  assertEquals(-1330674638.8117397, x += (tmp = -1330674638.8117397, tmp));
+  assertEquals(353, x >>>= (-212202857.4320326));
+  assertEquals(353, x ^= ((((x+(tmp = 1448262278, tmp))-(-3141272537))>>(tmp = 1116596587.7832575, tmp))>>>((x-(((tmp = 303953098, tmp)>>>((tmp = 691514425, tmp)/((176223098)*(((2876180016)%(-1805235275.892374))|x))))<<(((tmp = 528736141.838547, tmp)^(2556817082))*(2898381286.2846575))))|((-1445518239)&(tmp = 389789481.9604758, tmp)))));
+  assertEquals(0, x >>>= (-227376461.14343977));
+  assertEquals(0, x <<= (tmp = -2575967504, tmp));
+  assertEquals(0, x <<= (x^((-2668391896)>>((x+(tmp = 598697235.9205595, tmp))+((((-2105306785)|((-1174912319.794015)>>>(x-((148979923)%((((tmp = -2459140558.4436393, tmp)|(1265905916.494016))^(tmp = 1213922357.2230597, tmp))|(1028030636))))))%x)+(((tmp = 1393280827.0135512, tmp)^((tmp = 1210906638, tmp)+(-1572777641.1396031)))<<x))))));
+  assertEquals(0, x *= (tmp = 2134187165, tmp));
+  assertEquals(-1084549964, x -= (tmp = 1084549964, tmp));
+  assertEquals(-2045706240, x &= ((tmp = -1250758905.7889671, tmp)*(x+(((x<<(x/(tmp = -738983664.845448, tmp)))>>>x)&(tmp = 2197525295, tmp)))));
+  assertEquals(-2045706240, x ^= (((522049712.14743733)>>(tmp = -2695628092, tmp))>>>(tmp = -2603972068, tmp)));
+  assertEquals(2249261056, x >>>= x);
+  assertEquals(-33291, x |= ((((1891467762)<<(184547486.213719))-((458875403.50689447)^(((x&(x*x))|x)%(-3127945140))))|(-100765232)));
+  assertEquals(-33291, x %= (1460486884.1367688));
+  assertEquals(-1, x >>= (tmp = -2667341441, tmp));
+  assertEquals(-3.6289151568259606e-10, x /= (tmp = 2755644474.4072013, tmp));
+  assertEquals(-3.6289151568259606e-10, x %= (tmp = 1186700893.0751028, tmp));
+  assertEquals(0, x <<= (tmp = -1199872107.9612694, tmp));
+  assertEquals(371216449, x ^= ((tmp = 371324611.1357789, tmp)&(x-(x|((tmp = -518410357, tmp)>>((tmp = 687379733, tmp)/x))))));
+  assertEquals(0.3561383159088311, x /= (((((x%(((((-2293101242)%((((495316779)/x)-((-3198854939.8857965)>>>((tmp = -288916023, tmp)-(x^(tmp = -2504080119.431858, tmp)))))^(-1201674989)))-((2965433901)*(405932927)))/((1974547923)|(tmp = 534069372, tmp)))-(x-((x+(-1258297330))%x))))<<(((-2648166176.4947824)^(-3043930615))&(1550481610)))<<(tmp = -3118264986.743822, tmp))<<x)|x));
+  assertEquals(-46272499.15029934, x -= (tmp = 46272499.50643766, tmp));
+  assertEquals(-6, x >>= ((tmp = -731454087.0621192, tmp)>>>x));
+  assertEquals(-2.7207928474520667e-9, x /= (((x<<(x|((tmp = -1650731700.9540024, tmp)/(tmp = -677823292, tmp))))^((((((1972576122.928667)>>x)%(2952412902.115453))<<((-2888879343)+(tmp = -425663504, tmp)))>>>(((((tmp = 1089969932, tmp)>>>(x|((-2088509661)/(1131470551))))>>>x)+x)|(tmp = 955695979.7982506, tmp)))|(((((tmp = 826954002.6188571, tmp)^(2016485728))|((x/(((x<<(tmp = 2493217141, tmp))/(-2259979800.997408))-(tmp = -427592173.41389966, tmp)))%(((-471172918)/x)>>>((383234436.16425097)&(tmp = 1664411146.5308032, tmp)))))*(tmp = 1863669754.7545495, tmp))*(x>>(2062197604)))))>>>((x-(2624545856))*(tmp = 1025803102, tmp))));
+  assertEquals(0, x >>= ((tmp = 1068702028, tmp)*(296106770)));
+  assertEquals(0, x ^= (x/x));
+  assertEquals(85359536, x ^= (((x|(((tmp = 740629227, tmp)<<(-1107397366))%((tmp = 2315368172, tmp)>>(((-2269513683)|(-2698795048))+(-396757976)))))*(929482738.803125))^(((-1415213955.4198723)-(tmp = -2885808324, tmp))>>>((tmp = -472842353.85736656, tmp)&(tmp = 1684231312.4497018, tmp)))));
+  assertEquals(2075131904, x <<= x);
+  assertEquals(123, x >>>= (x>>>(tmp = 754093009, tmp)));
+  assertEquals(0, x >>= ((-2690948145)/((1988638799)+x)));
+  assertEquals(0, x >>>= (tmp = -798849903.2467625, tmp));
+  assertEquals(NaN, x %= x);
+  assertEquals(NaN, x *= (2431863540.4609756));
+  assertEquals(484934656, x |= ((-2322193663)*(tmp = -2754666771, tmp)));
+  assertEquals(-82505091404694530, x *= (tmp = -170136513, tmp));
+  assertEquals(-82505090515370620, x += ((-148762237)&(tmp = 889417717, tmp)));
+  assertEquals(-908221124, x %= (tmp = -2346393300, tmp));
+  assertEquals(-1242515799, x ^= (2083328917));
+  assertEquals(-1126056310271520600, x *= ((((tmp = -3065605442, tmp)<<(-3012703413))|x)^(-2081329316.4781387)));
+  assertEquals(-1126056309941068000, x += ((((tmp = 1886925157, tmp)&((tmp = -163003119.31722307, tmp)/((tmp = 2094816076, tmp)>>((tmp = -706947027, tmp)^x))))^((1819889650.5261197)<<(-1641091933)))>>x));
+  assertEquals(-1864360191, x |= (((x/x)|x)|x));
+  assertEquals(-1864360191, x &= x);
+  assertEquals(-3728720382, x += x);
+  assertEquals(1042663165, x ^= (535165183.4230335));
+  assertEquals(2644530017.8833704, x += (1601866852.8833704));
+  assertEquals(-574949401, x |= ((tmp = 943193254.5210983, tmp)^((x%(tmp = -2645213497, tmp))*(-1904818769))));
+  assertEquals(1763223578, x ^= ((x^(tmp = -2244359016, tmp))^(tmp = 320955522, tmp)));
+  assertEquals(-1.9640961474334235, x /= (tmp = -897727731.0502782, tmp));
+  assertEquals(1, x >>>= (x-(-3183031393.8967886)));
+  assertEquals(1, x &= (tmp = 1732572051.4196641, tmp));
+  assertEquals(1, x >>= (-1642797568));
+  assertEquals(-2339115203.3140306, x += (-2339115204.3140306));
+  assertEquals(1955852093, x ^= (((((-1469402389)/(-2648643333.1454573))>>>x)<<(x/x))>>x));
+  assertEquals(-965322519, x ^= (3001399252));
+  assertEquals(-2139727840, x &= (tmp = 2298411812.964484, tmp));
+  assertEquals(2103328, x &= (tmp = -2488723009, tmp));
+  assertEquals(1799011007, x |= (tmp = -2498057537.226923, tmp));
+  assertEquals(1799011007, x |= ((-308193085)>>>x));
+  assertEquals(1799011007, x |= x);
+  assertEquals(818879107, x ^= (1542823996.423564));
+  assertEquals(-2601416919234843600, x *= ((-2357923057.076759)-x));
+  assertEquals(-2601416920481796600, x -= (x|(tmp = -3048039765, tmp)));
+  assertEquals(-33690112, x <<= x);
+  assertEquals(1039491072, x &= (tmp = 1039491474.3389125, tmp));
+  assertEquals(126891, x >>= (-3079837011.6151257));
+  assertEquals(-163191923097543, x *= (((tmp = -2847221258.4048786, tmp)*(x-(tmp = 1527622853.5925639, tmp)))^x));
+  assertEquals(753616551, x ^= (-946895202));
+  assertEquals(-347691264, x <<= (tmp = -433184408.33790135, tmp));
+  assertEquals(0, x <<= (x|(tmp = -1911731462.6835637, tmp)));
+  assertEquals(-0, x *= (tmp = -2616154415.1662617, tmp));
+  assertEquals(0, x >>= x);
+  assertEquals(0, x -= x);
+  assertEquals(0, x *= (2272504250.501526));
+  assertEquals(0, x ^= x);
+  assertEquals(NaN, x %= x);
+  assertEquals(0, x >>>= (2475346113));
+  assertEquals(NaN, x /= (((x+(-2646140897))&(((tmp = 1039073714.142481, tmp)-x)*x))|(x*(((-1277822905.773948)>>(tmp = 2035512354.2400663, tmp))*(77938193.80013895)))));
+  assertEquals(0, x ^= (x<<(tmp = 2491934268, tmp)));
+  assertEquals(0, x &= (tmp = 569878335.4607931, tmp));
+  assertEquals(-88575883, x ^= ((453890820.8012209)-((1569189876)%((-1280613677.7083852)^(-1902514249.29567)))));
+  assertEquals(-88575883, x %= (tmp = 257947563.19206762, tmp));
+  assertEquals(-88575881.7863678, x -= ((tmp = 1257547359.029678, tmp)/(x^(tmp = 948265672.821815, tmp))));
+  assertEquals(-169, x >>= (tmp = -2530523309.6703596, tmp));
+  assertEquals(-1, x >>= x);
+  assertEquals(-1, x |= x);
+  assertEquals(131071, x >>>= (-673590289));
+}
+f();
diff --git a/deps/v8/test/mjsunit/numops-fuzz-part3.js b/deps/v8/test/mjsunit/numops-fuzz-part3.js
new file mode 100644
index 0000000000..7813f91820
--- /dev/null
+++ b/deps/v8/test/mjsunit/numops-fuzz-part3.js
@@ -0,0 +1,1178 @@
+// Copyright 2011 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+function f() {
+  var x = 131071;
+  var tmp = 0;
+  assertEquals(1117196836, x -= (-1117065765));
+  assertEquals(3092236000.7125187, x -= (-1975039164.7125185));
+  assertEquals(1, x /= x);
+  assertEquals(-1599945863, x ^= (tmp = 2695021432.453696, tmp));
+  assertEquals(940543782, x ^= (tmp = 2561494111, tmp));
+  assertEquals(891400321673221800, x *= (tmp = 947749949.2662871, tmp));
+  assertEquals(-1509927296, x >>= ((tmp = 1113290009, tmp)-x));
+  assertEquals(-23, x >>= (tmp = 3216989626.7370152, tmp));
+  assertEquals(-0, x %= x);
+  assertEquals(0, x <<= (431687857.15246475));
+  assertEquals(-0, x /= (tmp = -1924652745.081665, tmp));
+  assertEquals(0, x <<= (1312950547.2179976));
+  assertEquals(0, x %= ((tmp = 2110842937.8580878, tmp)|(x<<x)));
+  assertEquals(0, x >>>= ((((-386879000)-((tmp = -2334036143.9396124, tmp)/((tmp = 965101904.2841234, tmp)<<(((3029227182.8426695)<<((tmp = -464466927, tmp)>>((((((tmp = 849594477.4111787, tmp)^(x&((513950657.6663146)%(x>>>x))))-((2898589263)|x))+(tmp = 2842171258.621288, tmp))>>>(tmp = -3158746843, tmp))<<(tmp = -2891369879, tmp))))-(x-(x&(tmp = -1707413686.2706504, tmp)))))))-(-2860419051))*(-1708418923)));
+  assertEquals(-328055783, x += ((((2857010474.8010874)|((tmp = -1415997622.320347, tmp)-(-1706423374)))%(tmp = 824357977.1339042, tmp))^(x>>(x|x))));
+  assertEquals(-168539902503779140, x *= ((tmp = -1057687018, tmp)<<((1408752963)-(2030056734))));
+  assertEquals(-Infinity, x /= ((x-(2232683614.320658))*(((tmp = 195551174, tmp)*((((739595970)>>>(tmp = -2218890946.8788786, tmp))>>>(((tmp = -240716255.22407627, tmp)&(((((1598029916.3478878)|((tmp = -881749732, tmp)+(x>>x)))^(4443059))<<(((tmp = 2453020763, tmp)+((x>>>(tmp = -1904203813, tmp))&(-355424604.49235344)))<<(tmp = 2814696070, tmp)))%((tmp = -250266444, tmp)>>>(((((2710614972)&(((tmp = 910572052.6994087, tmp)^(tmp = -1028443184.3220406, tmp))/((-2718010521)^(tmp = 676361106, tmp))))|x)^(-1326539884))>>(-1573782639.7129154)))))/(tmp = 1923172768, tmp)))>>>(tmp = -2858780232.4886074, tmp)))/((((((-2060319376.353397)%x)>>(tmp = -3122570085.9065285, tmp))/(tmp = -1499018723.8064275, tmp))*((-655257391)<<x))>>x))));
+  assertEquals(NaN, x += ((3059633304)%((((tmp = 2538190083, tmp)*((tmp = -2386800763.356364, tmp)/x))&(1341370996))%(-2929765076.078223))));
+  assertEquals(NaN, x %= ((x&(347774821))>>>(462318570.2578629)));
+  assertEquals(NaN, x *= ((2829810152.071517)*(tmp = 768565684.6892327, tmp)));
+  assertEquals(NaN, x -= x);
+  assertEquals(0, x >>>= (x&(tmp = 1786182552, tmp)));
+  assertEquals(973967377, x ^= ((tmp = 2115869489.836838, tmp)&(994956497)));
+  assertEquals(985246427.4230617, x += (11279050.423061728));
+  assertEquals(985246427, x &= x);
+  assertEquals(0, x >>= ((tmp = 1090502660.1867907, tmp)>>((-1599370623.5747645)-(tmp = -1321550958, tmp))));
+  assertEquals(0, x %= (tmp = -2386531950.018572, tmp));
+  assertEquals(0, x >>>= x);
+  assertEquals(NaN, x /= x);
+  assertEquals(0, x >>>= (tmp = -1535987507.682257, tmp));
+  assertEquals(-0, x /= (-2570639987));
+  assertEquals(-542895632, x |= (tmp = -542895632, tmp));
+  assertEquals(-33930977, x >>= (tmp = -861198108.1147206, tmp));
+  assertEquals(-0, x %= x);
+  assertEquals(0, x ^= (x*(-608154714.1872904)));
+  assertEquals(-140011520, x |= ((tmp = 377418995, tmp)<<((1989575902)>>(tmp = -2558458031.066773, tmp))));
+  assertEquals(-140026048, x -= ((((tmp = 1465272774.7540011, tmp)<<((2164701398)<<(tmp = -818119264, tmp)))>>((tmp = -1490486001, tmp)>>(664410099.6412607)))>>(x>>>(((tmp = -2438272073.2205153, tmp)%(tmp = 2142162105.4572072, tmp))-(tmp = 2259040711.6543813, tmp)))));
+  assertEquals(39214588236996610, x *= (x<<(-401696127.06632423)));
+  assertEquals(1, x /= x);
+  assertEquals(0, x %= x);
+  assertEquals(0, x *= ((tmp = -1709874807.176726, tmp)&(-2786424611)));
+  assertEquals(-1320474063.3408537, x += (tmp = -1320474063.3408537, tmp));
+  assertEquals(88, x >>>= (tmp = -3179247911.7094674, tmp));
+  assertEquals(1606348131, x += ((tmp = 1555621121.5726175, tmp)|(-3026277110.9493155)));
+  assertEquals(200793516, x >>>= x);
+  assertEquals(-2952688672.1074514, x -= (tmp = 3153482188.1074514, tmp));
+  assertEquals(1342278624, x >>>= ((x>>>((tmp = 1264475713, tmp)-(-913041544)))>>>((tmp = 2008379930, tmp)%(tmp = 3105129336, tmp))));
+  assertEquals(0, x ^= x);
+  assertEquals(0, x /= (tmp = 788363717, tmp));
+  assertEquals(430466213, x -= (tmp = -430466213, tmp));
+  assertEquals(164757385222499550, x *= (tmp = 382741735, tmp));
+  assertEquals(164757385222499550, x %= (((tmp = 1974063648, tmp)%((806015603)>>>x))*((tmp = 2836795324, tmp)<<(tmp = -1785878767, tmp))));
+  assertEquals(-190957725.86956096, x /= (x^((-2939333300.066044)-(x|(-2085991826)))));
+  assertEquals(-190957725.86956096, x %= (tmp = -948386352, tmp));
+  assertEquals(0.6457336106922105, x /= (-295722141));
+  assertEquals(0, x |= ((415991250)&((x>>(tmp = -3188277823, tmp))<<(511898664.1008285))));
+  assertEquals(0, x &= ((793238922)|x));
+  assertEquals(-1576701979, x ^= (2718265317));
+  assertEquals(-49271937, x >>= x);
+  assertEquals(-49271937, x |= x);
+  assertEquals(-49271937, x &= x);
+  assertEquals(775316382, x -= (-824588319));
+  assertEquals(912498176, x <<= (tmp = -2223542776.836312, tmp));
+  assertEquals(0, x -= (x&((tmp = 1999412385.1074471, tmp)/(-1628205254))));
+  assertEquals(0, x -= x);
+  assertEquals(0, x >>= (-768730139.7749677));
+  assertEquals(-1861304245, x |= (((5128483)^(((tmp = -1768372004, tmp)/(x^(tmp = 1310002444.757094, tmp)))*((tmp = 188242683.09898067, tmp)^(tmp = -2263757432, tmp))))^((tmp = 2223246327, tmp)*((tmp = -2360528979, tmp)-((tmp = 2442334308, tmp)>>(458302081))))));
+  assertEquals(1, x /= x);
+  assertEquals(2, x += x);
+  assertEquals(1, x /= x);
+  assertEquals(0, x ^= x);
+  assertEquals(-0, x *= (-1852374359.3930533));
+  assertEquals(0, x <<= (tmp = 1223645195.148961, tmp));
+  assertEquals(1789655087, x |= ((-2505312209.770559)>>x));
+  assertEquals(-65568768, x <<= x);
+  assertEquals(4229398528, x >>>= x);
+  assertEquals(-8408187, x |= (-3029781627));
+  assertEquals(-8408187, x |= (((2322165037)-((tmp = -1424506897.362995, tmp)%x))&x));
+  assertEquals(-7884926, x += (x>>>(x|(2738095820))));
+  assertEquals(-7884926, x %= (576507013));
+  assertEquals(751801768, x ^= (tmp = -750241238, tmp));
+  assertEquals(-1986010067668600800, x *= (tmp = -2641667195, tmp));
+  assertEquals(1921196240, x ^= (x%(-1954178308)));
+  assertEquals(847388880, x ^= ((tmp = 1632856124, tmp)&((tmp = -1536309755, tmp)<<(tmp = -3158362800, tmp))));
+  assertEquals(-469662000.6651099, x += (tmp = -1317050880.6651099, tmp));
+  assertEquals(-812358332, x ^= ((-2832480471)>>>(2016495937)));
+  assertEquals(21, x ^= (((tmp = 1815603134.2513008, tmp)/((tmp = 147415927, tmp)%(-1059701742)))+x));
+  assertEquals(-2844409139.792712, x += (tmp = -2844409160.792712, tmp));
+  assertEquals(177070, x >>>= x);
+  assertEquals(0, x %= x);
+  assertEquals(0, x >>= x);
+  assertEquals(1459126376, x ^= (tmp = -2835840920, tmp));
+  assertEquals(1459126376, x %= (-1462864282));
+  assertEquals(0, x >>>= (tmp = 2922724319, tmp));
+  assertEquals(338995506, x ^= (338995506.6411549));
+  assertEquals(336896258, x &= (2635904967));
+  assertEquals(336634112, x -= (x&(tmp = 1659656287, tmp)));
+  assertEquals(NaN, x %= (x-x));
+  assertEquals(NaN, x /= (tmp = -674606200, tmp));
+  assertEquals(NaN, x %= ((x|(2788108542))/(x+(tmp = 600941473, tmp))));
+  assertEquals(0, x >>>= ((-1858251597.3970242)>>>x));
+  assertEquals(1951294747, x |= (tmp = 1951294747, tmp));
+  assertEquals(1951294747, x &= x);
+  assertEquals(-153190625, x |= (-1500095737));
+  assertEquals(23467367587890624, x *= x);
+  assertEquals(346531290.1813514, x /= (((((-513617734.11148167)|x)/((tmp = -2042982150.1170752, tmp)%((x%((x%x)>>>(((-1369980151)&(((922678983)%(x&(tmp = -855337708, tmp)))-((tmp = -2717183760, tmp)>>>((1939904985.4701347)%(((tmp = -2473316858, tmp)&((tmp = -599556221.9046664, tmp)>>((tmp = -6352213, tmp)/x)))&x)))))%x)))/((tmp = -1842773812.8648412, tmp)>>>(((x>>>(tmp = 499774063, tmp))<<(((tmp = -1353532660.5755146, tmp)*(-3070956509))>>(((-905883994.0188017)>>(tmp = -16637173, tmp))<<((tmp = 471668537, tmp)*((tmp = -232036004.26637793, tmp)/x)))))&(tmp = 85227224, tmp))))))>>>(x|(-2528471983)))-((tmp = 1531574803, tmp)+((x>>>x)-(2889291290.158888)))));
+  assertEquals(-94.42225749399837, x /= (((tmp = 2381634642.1432824, tmp)>>(tmp = -2637618935, tmp))|(2307200473)));
+  assertEquals(-47, x >>= (1524333345.141235));
+  assertEquals(-2.8699253616435082e-8, x /= (1637673252));
+  assertEquals(0, x |= x);
+  assertEquals(1083427040, x += ((-2012055268)<<(tmp = -2192382589.6911573, tmp)));
+  assertEquals(1083427040, x %= (x*x));
+  assertEquals(2694039776, x += ((((-1740065704.9004602)<<(-736392934))%(2781638048.424092))>>>(x&x)));
+  assertEquals(-1600927520, x |= ((tmp = 2904430054.869525, tmp)*(((1054051883.4751332)*x)*((-939020743)-(tmp = 1636935481.1834455, tmp)))));
+  assertEquals(-1600927520, x -= (x%x));
+  assertEquals(3037584978216498700, x *= (tmp = -1897390694, tmp));
+  assertEquals(372598954.1823988, x %= (tmp = 1553763703.5082102, tmp));
+  assertEquals(-1476395008, x <<= ((x>>((tmp = 282496335.49494267, tmp)^((-1948623419.6947453)|((((((tmp = -1203306995, tmp)-(-5554612.355098486))>>>(1867254951.4836824))>>x)|(-695777865))/((-59122652.19377303)<<(-609999229.7448442))))))>>(x/(tmp = -1207010654.9993455, tmp))));
+  assertEquals(-2.2540185787941605, x /= (((tmp = 1364159859.9199843, tmp)*x)>>x));
+  assertEquals(-2, x |= x);
+  assertEquals(2241824008, x *= ((3174055292.962967)>>(((-2379151623.602476)>>(tmp = -1423760236, tmp))>>(tmp = -522536019.2225733, tmp))));
+  assertEquals(-2138158385, x ^= ((x>>((((1316131966.9180691)-((x*x)>>x))>>>x)>>((-2712430284)|(((((x<<(-616185937.6090865))-(((x-(tmp = 2957048661, tmp))<<(tmp = 617564839.888214, tmp))/(x%((tmp = -447175647.9393475, tmp)<<(2203298493.460617)))))-((x&((x<<(914944265))^(((-1294901094)*((tmp = 2512344795, tmp)+((((tmp = -1227572518, tmp)%(1831277766.4920158))*((x|x)^(tmp = 2515415182.6718826, tmp)))*x)))-(961485129))))>>>(tmp = 2079018304, tmp)))>>(tmp = 734028202, tmp))^(554858721.6149715)))))-((tmp = 1312985279.5114603, tmp)^(tmp = 2450817476.179955, tmp))));
+  assertEquals(2.759030298237921, x /= (x|(tmp = -775901745.3688724, tmp)));
+  assertEquals(8, x <<= x);
+  assertEquals(NaN, x %= (((x&((1792031228.831834)>>(-1174912501)))%(((-2351757750)+(tmp = -2610099430, tmp))*(-2811655968)))*(x&(tmp = -1881632878, tmp))));
+  assertEquals(0, x &= ((x*(616116645.7508612))^(2789436828.536846)));
+  assertEquals(0, x *= x);
+  assertEquals(35097452, x ^= ((tmp = 1023684579, tmp)%(((x|((tmp = -757953041, tmp)+(772988909)))+(tmp = -2934577578, tmp))>>>((tmp = -1973224283, tmp)>>>((x*(2244818063.270375))|(x-(-716709285)))))));
+  assertEquals(0.015207441433418992, x /= (2307913014.4056892));
+  assertEquals(-5865042.942076175, x -= (5865042.957283616));
+  assertEquals(-67719.94207617454, x %= (((1464126615.2493973)+(398302030.0108756))>>>x));
+  assertEquals(4294899577, x >>>= (x<<x));
+  assertEquals(-1, x >>= (tmp = 607447902, tmp));
+  assertEquals(-1, x >>= (3081219749.9119744));
+  assertEquals(6.53694303504065e-10, x /= (tmp = -1529767040.4034374, tmp));
+  assertEquals(6.53694303504065e-10, x %= ((tmp = 899070650.7190754, tmp)&(tmp = -1101166301, tmp)));
+  assertEquals(6.53694303504065e-10, x %= (tmp = -2207346460, tmp));
+  assertEquals(NaN, x %= (((x&x)>>x)%(((-10980184)+x)&(tmp = -1473044870.4729445, tmp))));
+  assertEquals(NaN, x -= x);
+  assertEquals(-1755985426, x ^= (tmp = 2538981870, tmp));
+  assertEquals(-13842, x %= ((((-2258237411.3816605)+(-1325704332.0531585))<<((tmp = -877665450.1877053, tmp)>>(((((2420989037)+(2084279990.6278818))*(-327869571.9348242))+x)^x)))>>>x));
+  assertEquals(1, x /= x);
+  assertEquals(1, x >>= ((2241312290)^(2859250114)));
+  assertEquals(0, x >>= x);
+  assertEquals(-1615631756, x |= (-1615631756.1469975));
+  assertEquals(-1615631756, x |= x);
+  assertEquals(-627245056, x <<= ((x*(tmp = -1308330685.5971081, tmp))|(tmp = 1479586158, tmp)));
+  assertEquals(-627245056, x |= x);
+  assertEquals(1786953888, x ^= (-1340096352.1839824));
+  assertEquals(1668014353, x -= (tmp = 118939535, tmp));
+  assertEquals(1, x /= x);
+  assertEquals(-645681, x ^= ((-1322356629)>>(tmp = 1829870283, tmp)));
+  assertEquals(-1322354688, x <<= (-794779253));
+  assertEquals(-4310084378.672725, x += (-2987729690.6727247));
+  assertEquals(-8620168757.34545, x += x);
+  assertEquals(-8720421, x |= (tmp = -748107877.6417065, tmp));
+  assertEquals(-1508858270, x ^= (1500137913));
+  assertEquals(-0.825735756765112, x /= (1827289490.1767085));
+  assertEquals(1253449509.1742642, x += (((tmp = 1253449509.9576545, tmp)-(((tmp = 2860243975, tmp)+(367947569.85976696))>>(((((530960315)>>>((((x%(tmp = -2203199228, tmp))<<(x*(((tmp = -117302283, tmp)/(x-((2579576936)%(-1225024012))))&(tmp = -2857767500.1967726, tmp))))/((x/((tmp = -166066119, tmp)<<x))|x))>>>x))|(((2771852372)>>(((tmp = -3103692094.1463976, tmp)-(tmp = 2867208546.069278, tmp))>>>(702718610.1963737)))|(tmp = 2680447361, tmp)))>>x)>>(-2006613979.051014))))^((-1665626277.9339101)/(x<<(tmp = 342268763, tmp)))));
+  assertEquals(1693336701.1742642, x += (tmp = 439887192, tmp));
+  assertEquals(0.8479581831275719, x /= ((1171383583)+(((x&x)>>>(51482548.618915915))-(tmp = -825572595.1031849, tmp))));
+  assertEquals(28, x |= ((tmp = -2355932919.6737213, tmp)>>(tmp = -2395605638, tmp)));
+  assertEquals(0, x %= x);
+  assertEquals(0, x -= x);
+  assertEquals(0, x <<= (x^((tmp = 2793423893.484949, tmp)*(1585074754.3250475))));
+  assertEquals(0, x >>= (x/(x-((957719861.9175875)&(1288527195)))));
+  assertEquals(0, x >>>= ((-1429196921.4432657)/x));
+  assertEquals(-852424225.734199, x -= (tmp = 852424225.734199, tmp));
+  assertEquals(-46674433, x |= ((tmp = -2335242963, tmp)*((2135206646.2614377)>>(tmp = 505649511.8292929, tmp))));
+  assertEquals(2944662357, x += (tmp = 2991336790, tmp));
+  assertEquals(1404, x >>>= (849155189.1503456));
+  assertEquals(-846755170, x ^= (tmp = -846753822.4471285, tmp));
+  assertEquals(52615, x >>>= ((-517068110)+x));
+  assertEquals(1475021859.9916897, x += (tmp = 1474969244.9916897, tmp));
+  assertEquals(0, x %= x);
+  assertEquals(0, x %= ((539583595.8244679)*(tmp = 1469751690.9193692, tmp)));
+  assertEquals(0, x &= (807524227.2057163));
+  assertEquals(NaN, x %= x);
+  assertEquals(NaN, x -= (x^((tmp = -362481588, tmp)%(2611296227))));
+  assertEquals(NaN, x *= x);
+  assertEquals(0, x >>= ((-2519875630.999908)<<x));
+  assertEquals(NaN, x %= x);
+  assertEquals(NaN, x += (((tmp = 2485209575, tmp)>>(tmp = 2326979823, tmp))%(x-(((-1296334640.7476478)&x)<<x))));
+  assertEquals(0, x >>= (((tmp = 1370704131, tmp)^((((tmp = 793217372.7587746, tmp)>>(((-1455696484.109328)|(((((-2186284424.5379324)<<(tmp = 3052914152.254852, tmp))-(x>>(tmp = 3121403408, tmp)))+((778194280)-(((((tmp = 2398957652, tmp)-(x+(((-2592019996.937958)>>((tmp = 1648537981, tmp)>>x))<<(-677436594))))<<(39366669.09012544))|((tmp = 3133808408.9582872, tmp)-(-2987527245.010673)))*x)))|((tmp = -2178662629, tmp)<<x)))^(((tmp = 909652440.3570575, tmp)%(-2572839902.6852217))%(-1879408081))))*(tmp = -2910988598, tmp))&(((x^x)>>(2822040993))|((x*x)^(((1072489842.6785052)|(x-(((464054192.7390214)^x)<<(tmp = -2754448095, tmp))))*((tmp = -1544182396, tmp)/(tmp = -3198554481, tmp)))))))^(tmp = 1946162396.9841106, tmp)));
+  assertEquals(371272192, x |= (((x^((x-(x/x))&(tmp = 2370429394, tmp)))-(tmp = -403692829, tmp))*(tmp = 2808636109, tmp)));
+  assertEquals(929786482, x |= ((729966239.8987448)^(x-((tmp = 120127779, tmp)^((tmp = -3088531385, tmp)>>>((x+((tmp = 2364833601, tmp)>>>(((599149090.6666714)>>(tmp = 2838821032, tmp))%(tmp = -662846011, tmp))))-(tmp = 1168491221.1813436, tmp)))))));
+  assertEquals(-681121542, x += ((-1610909505.998718)^((tmp = -957338882, tmp)>>>(tmp = 1935594133.6531684, tmp))));
+  assertEquals(-2147483648, x <<= ((tmp = 15161708, tmp)|(2453975670)));
+  assertEquals(-2147483648, x >>= x);
+  assertEquals(0, x <<= (2080486058));
+  assertEquals(0, x &= (((x&(tmp = -767821326, tmp))/((tmp = 1877040536, tmp)>>>(tmp = 2378603217.75597, tmp)))*(-1601799835)));
+  assertEquals(0, x %= (-1820240383));
+  assertEquals(1621233920, x ^= ((tmp = 820230232, tmp)*(1727283900)));
+  assertEquals(1621233920, x |= (x>>>x));
+  assertEquals(1621233931, x += ((tmp = 794966194.9011587, tmp)>>(tmp = -597737830.5450518, tmp)));
+  assertEquals(1621276543, x |= (((x^((2354444886)+(tmp = 685142845.4708651, tmp)))-(tmp = 790204976.9120214, tmp))>>>((((tmp = -2792921939, tmp)/(((((tmp = -80705524, tmp)<<x)-(((((((tmp = 1951577216.379527, tmp)>>>x)%((-529882150)>>>(tmp = -1682409624, tmp)))<<((-42043756.29025769)-(-1803729173.6855814)))/(2937202170.118023))*(tmp = -1998098798.5722106, tmp))*(tmp = -2996229463.904228, tmp)))&x)>>>(-301330643)))/(-2858859382.0050273))-(tmp = 1571854256.0740635, tmp))));
+  assertEquals(810638271, x >>>= (x/(1553632833)));
+  assertEquals(810638271, x <<= (tmp = -1467397440, tmp));
+  assertEquals(-2147483648, x <<= x);
+  assertEquals(871068871, x ^= (tmp = 3018552519, tmp));
+  assertEquals(-1073743881, x |= ((tmp = 2294122324.020989, tmp)|(tmp = -1799706842.4493146, tmp)));
+  assertEquals(-77816868, x += (((-2225296403)&x)>>(tmp = -2667103424.445239, tmp)));
+  assertEquals(-1215889, x >>= (tmp = 1876107590.8391647, tmp));
+  assertEquals(-2431778, x += x);
+  assertEquals(4292535518, x >>>= (((x>>(-1825580683))/x)%x));
+  assertEquals(4292802560, x -= (x|(1492864090)));
+  assertEquals(0, x -= x);
+  assertEquals(0, x >>= x);
+  assertEquals(0, x %= (tmp = 2173121205, tmp));
+  assertEquals(0, x *= (x>>x));
+  assertEquals(1565261471, x |= ((1565261471.323931)>>>x));
+  assertEquals(0, x -= x);
+  assertEquals(-86980804, x |= (-86980804));
+  assertEquals(-698956484, x -= (((((2754713793.1746016)*(((((-1514587465.0698888)>>(tmp = -1307050817, tmp))/(tmp = 2368054667.438519, tmp))*(-1908125943.5714772))<<(x>>>(-357164827.4932244))))+(1257487617))<<(2954979945))&(612330472)));
+  assertEquals(-1073741824, x <<= x);
+  assertEquals(54497747, x ^= (-1019244077.098908));
+  assertEquals(54501375, x |= (((tmp = 1944912427, tmp)>>>x)%x));
+  assertEquals(0, x -= x);
+  assertEquals(0, x -= x);
+  assertEquals(-0, x *= (-1748215388));
+  assertEquals(0, x >>= x);
+  assertEquals(0, x >>>= (((tmp = 988769112, tmp)%(tmp = -3133658477, tmp))<<x));
+  assertEquals(0, x %= (1685221089.2950323));
+  assertEquals(0, x >>>= (x+((793467168)-(tmp = 135877882, tmp))));
+  assertEquals(0, x %= ((tmp = -2406801984, tmp)%(tmp = -987618172, tmp)));
+  assertEquals(0, x *= ((-2943444887.953456)|(tmp = -2327469738.4544783, tmp)));
+  assertEquals(0, x >>= x);
+  assertEquals(-145484729.70167828, x += (tmp = -145484729.70167828, tmp));
+  assertEquals(1140855872, x &= (x^(tmp = 3151437967.965556, tmp)));
+  assertEquals(1486808408, x += (tmp = 345952536, tmp));
+  assertEquals(107846582.36594129, x %= (-1378961825.6340587));
+  assertEquals(-642031616, x <<= (x+x));
+  assertEquals(151747770.95108718, x *= (x/(tmp = 2716379907, tmp)));
+  assertEquals(192723456, x <<= (tmp = -1731167384, tmp));
+  assertEquals(2151208003, x -= ((-2151208003)+x));
+  assertEquals(1, x /= x);
+  assertEquals(1, x |= x);
+  assertEquals(1996766603, x |= (1996766602));
+  assertEquals(895606123, x ^= (tmp = 1113972960.966081, tmp));
+  assertEquals(-1500036886, x ^= (tmp = 2482412929, tmp));
+  assertEquals(-1542644247, x ^= (x>>>((tmp = 51449105, tmp)>>>(((-2057313176)*x)/(-1768119916)))));
+  assertEquals(-1496074063273093600, x *= ((tmp = 786152274, tmp)^(387292498)));
+  assertEquals(-794329073, x %= (((tmp = -2314637675.617696, tmp)*((((x*(411053423.29070306))-(2889448433.4240828))/((-970630131)/(tmp = -2886607600.7423067, tmp)))<<(tmp = 1263617112.9362245, tmp)))|(2816980223.8209996)));
+  assertEquals(2468008436047106600, x *= (tmp = -3107035257.725115, tmp));
+  assertEquals(3040956928, x >>>= ((tmp = 1514372119.1787262, tmp)*(3169809008)));
+  assertEquals(-19, x >>= (tmp = -266966022.10604453, tmp));
+  assertEquals(-1.6505580654964654e-8, x /= ((-3143841480)>>(x-x)));
+  assertEquals(-2.2420284729165577e-7, x *= (x*((((703414102.2523813)%(tmp = 2989948152, tmp))-((-1583401827.2949386)^((tmp = -1916731338, tmp)%((331500653.3566053)|(((tmp = 29865940, tmp)+((tmp = -2294889418.6764183, tmp)<<(tmp = -1558629267.255229, tmp)))>>>(x*(x+x)))))))|((988977957)&(-2986790281)))));
+  assertEquals(0, x ^= (x/(tmp = 781117823.345541, tmp)));
+  assertEquals(NaN, x *= (((x^((((tmp = -2969290335, tmp)+(((((tmp = -175387021, tmp)&(tmp = -1080807973, tmp))<<(tmp = -2395571076.6876855, tmp))|((tmp = -1775289899.4106793, tmp)^x))|(-2963463918)))*(tmp = -1761443911, tmp))^(tmp = 847135725, tmp)))<<((146689636)<<x))%x));
+  assertEquals(0, x ^= x);
+  assertEquals(1720182184, x -= (((tmp = 3184020508, tmp)|((-489485703)+(tmp = -2644503573, tmp)))&(tmp = 2575055579.6375213, tmp)));
+  assertEquals(1720182184, x >>= (x<<(-45408034)));
+  assertEquals(5.759243187540471e+27, x *= (((x&(1456298805))+(x<<(106573181)))*((566861317.2877743)+(2262937360.3733215))));
+  assertEquals(5.759243187540471e+27, x -= (tmp = -1365873935, tmp));
+  assertEquals(0, x <<= x);
+  assertEquals(0, x >>= (1960073319.3465362));
+  assertEquals(0, x <<= x);
+  assertEquals(560463904, x += ((tmp = 1844076589.9286406, tmp)&((((((-691675777.5800121)|(-745631201))|x)+(tmp = 1504458593.2843904, tmp))-x)<<x)));
+  assertEquals(-513210271, x -= (x|(1052702623.7761713)));
+  assertEquals(3781757025, x >>>= ((-1346666404.362477)*(tmp = 2798191459, tmp)));
+  assertEquals(1080100929, x &= (1122097879.882534));
+  assertEquals(1276833905.8093092, x *= ((1276833905.8093092)/x));
+  assertEquals(1276833905.8093092, x %= (1796226525.7152414));
+  assertEquals(1276833905, x <<= (((tmp = -491205007.83412814, tmp)*(tmp = 1496201476.496839, tmp))>>(x+((tmp = -854043282.114594, tmp)-((x|(tmp = -807842056, tmp))*x)))));
+  assertEquals(1276833905, x %= (((-1870099318)>>>(((tmp = -2689717222, tmp)/(248095232))/(tmp = 1036728800.5566598, tmp)))&(((((857866837)>>(tmp = 3034825801.740485, tmp))|(-1676371984))>>>(x<<x))%((-3035366571.0221004)*(1578324367.8819473)))));
+  assertEquals(1, x /= x);
+  assertEquals(2819223656.189109, x += (2819223655.189109));
+  assertEquals(-1475743640, x >>= (((tmp = 2586723314.38089, tmp)/(x&(tmp = -697978283.9961061, tmp)))<<(x%((-1167534676)>>(x^((tmp = -284763535, tmp)*((x%x)&((((tmp = 2916973220.726839, tmp)%x)/(tmp = -1338421209.0621986, tmp))|((tmp = -834710536.803335, tmp)%x)))))))));
+  assertEquals(-3267683406, x -= (tmp = 1791939766, tmp));
+  assertEquals(-2090420900700614100, x *= (639725653));
+  assertEquals(-1540353536, x %= ((-1800269105)<<((((x&(((tmp = 1135087416.3945065, tmp)^(613708290))>>x))>>(tmp = -1234604858.7683473, tmp))^(2404822882.7666225))>>>((tmp = -287205516, tmp)-((1648853730.1462333)^((x+(x%((tmp = 359176339, tmp)%((2856479172)<<(tmp = -1995209313, tmp)))))^(((tmp = 2857919171.839304, tmp)>>>(tmp = 2779498870, tmp))>>x)))))));
+  assertEquals(-2093767030, x ^= (654554250.498078));
+  assertEquals(1, x >>>= ((tmp = -166296226.12181997, tmp)^(x/x)));
+  assertEquals(-1487427474, x -= ((x<<x)|(1487427475.4063978)));
+  assertEquals(-1487427470.562726, x += ((-1226399959.8267038)/((tmp = 2172365551, tmp)<<x)));
+  assertEquals(-3457859227618939400, x *= (tmp = 2324724597.3686075, tmp));
+  assertEquals(396221312, x >>= (-1354035390));
+  assertEquals(0, x %= x);
+  assertEquals(0, x &= (tmp = 2733387603, tmp));
+  assertEquals(1485905453, x |= ((((tmp = -1321532329.304437, tmp)&((((tmp = 1817382709.4180388, tmp)%(((tmp = 2089156555.7749293, tmp)-(-1555460267))|(tmp = 717392475.9986715, tmp)))%(tmp = 1976713214, tmp))^x))>>>x)+(tmp = -2812404197.002721, tmp)));
+  assertEquals(1485905453, x |= x);
+  assertEquals(-997658264, x <<= (-1409757949.6038744));
+  assertEquals(-997657290, x -= ((-2041106361)>>(tmp = -2014750507, tmp)));
+  assertEquals(-2138512124, x &= (tmp = 2565597060, tmp));
+  assertEquals(8422400, x &= ((-2819342693.5172367)*(tmp = 1441722560, tmp)));
+  assertEquals(111816531.81703067, x -= (-103394131.81703067));
+  assertEquals(59606682.673836395, x *= ((tmp = -1451690098, tmp)/(x-(2835050651.717734))));
+  assertEquals(-119213365.34767279, x *= (x|((-2656365050)/((-66180492)+(tmp = 284225706.32323086, tmp)))));
+  assertEquals(-232839, x >>= (1694344809.435083));
+  assertEquals(-1, x >>= x);
+  assertEquals(1, x *= x);
+  assertEquals(1, x |= x);
+  assertEquals(0, x >>= (tmp = 397239268, tmp));
+  assertEquals(-1525784563, x -= (tmp = 1525784563, tmp));
+  assertEquals(-153.62740888512675, x /= (((tmp = -2040622579.5354173, tmp)*(tmp = -1149025861.549324, tmp))%(((tmp = 2981701364.0073133, tmp)*(tmp = 2993366361, tmp))|(x|(tmp = 1800299979, tmp)))));
+  assertEquals(-1671795135, x &= (-1671795135.6173766));
+  assertEquals(-4253, x |= ((((x*((1533721762.8796673)<<((tmp = 1026164775.0081646, tmp)<<x)))<<(((x-((((x>>((((((tmp = -481536070.7067797, tmp)&(tmp = 1663121016, tmp))>>>(-2974733313.5449667))+(tmp = -493019653, tmp))>>x)&(tmp = 879307404.8600142, tmp)))>>>x)%(x-(tmp = -1806412445.788453, tmp)))%x))<<(x<<(x+x)))+x))>>((tmp = -332473688.28477216, tmp)<<((tmp = 1701065928, tmp)+(((((tmp = -2407330783, tmp)+x)-((tmp = 584100783, tmp)%(tmp = -3077106506, tmp)))^x)>>x))))<<x));
+  assertEquals(-0, x %= x);
+  assertEquals(0, x >>>= x);
+  assertEquals(0, x >>>= (1578470476.6074834));
+  assertEquals(0, x >>>= (974609751));
+  assertEquals(-120, x += (x-((tmp = -245718438.0842378, tmp)>>>(tmp = -1870354951, tmp))));
+  assertEquals(-6.134465505515781e-8, x /= (1956160645));
+  assertEquals(-0, x %= x);
+  assertEquals(0, x *= (tmp = -399718472.70049024, tmp));
+  assertEquals(-1803198769.8413258, x += (-1803198769.8413258));
+  assertEquals(988624943, x ^= ((((tmp = 320776739.5608537, tmp)*(((tmp = -983452570.3150327, tmp)^x)&(tmp = -3181597938, tmp)))-(tmp = -1367913740.9036021, tmp))/(((tmp = -535854933.2943456, tmp)-(717666905.8122432))>>>(((((x^(tmp = 380453258.60062766, tmp))^(tmp = -1242333929, tmp))/((tmp = 1072416261, tmp)+(((2090466933)*(x*(tmp = -386283072, tmp)))|((tmp = 789259942, tmp)<<(tmp = -1475723636.1901488, tmp)))))>>>x)%((x>>(tmp = -1243048658.3818703, tmp))|((((((tmp = -619553509, tmp)|x)/(878117279.285609))|((x<<(x>>>(tmp = -749568437.7390883, tmp)))*x))/(tmp = 1674804407, tmp))-(x*(tmp = 1528620873, tmp))))))));
+  assertEquals(988625135, x |= (x>>>(tmp = 2402222006, tmp)));
+  assertEquals(988625135, x %= (-2691094165.990094));
+  assertEquals(0, x %= x);
+  assertEquals(-0, x *= (tmp = -1409904262, tmp));
+  assertEquals(-0, x /= ((1176483512.8626208)<<x));
+  assertEquals(0, x &= ((((1677892713.6240005)^(tmp = 2575724881, tmp))^(tmp = -2935655281.208194, tmp))*(216675668)));
+  assertEquals(0, x >>= (tmp = -1296960457, tmp));
+  assertEquals(0, x |= x);
+  assertEquals(NaN, x /= x);
+  assertEquals(0, x <<= (x>>(-3127984289.9112387)));
+  assertEquals(0, x %= ((tmp = 190018725.45957255, tmp)<<((x>>>x)/x)));
+  assertEquals(0, x /= (1185681972));
+  assertEquals(0, x &= ((tmp = -1285574617, tmp)>>x));
+  assertEquals(0, x >>>= ((tmp = 2498246277.2054763, tmp)+(((tmp = 924534435, tmp)&x)>>(tmp = 1379755429, tmp))));
+  assertEquals(0, x -= x);
+  assertEquals(0, x /= (3093439341));
+  assertEquals(0, x *= (x>>>x));
+  assertEquals(0, x &= (tmp = 551328367, tmp));
+  assertEquals(-0, x /= (-3153411714.834353));
+  assertEquals(1217585288, x ^= (tmp = -3077382008.637764, tmp));
+  assertEquals(-639702017, x |= ((tmp = -640922633, tmp)%(tmp = -879654762, tmp)));
+  assertEquals(-1645297680, x <<= (tmp = 1418982820.8182912, tmp));
+  assertEquals(-1.4059558868398736, x /= (1170234212.4674253));
+  assertEquals(-2650856935.66554, x *= (1885448157));
+  assertEquals(1326259953.26931, x *= (((x>>(x|(-496195134.78045774)))+((2029515886)%(tmp = 1148955580, tmp)))/(tmp = -1760016519, tmp)));
+  assertEquals(0, x &= (((((-273334205)+(tmp = 797224093.682485, tmp))/x)>>>((((tmp = -887577414, tmp)/x)+x)%(tmp = 720417467, tmp)))^(((x-(tmp = -309071035, tmp))>>(-3123114729.33889))/x)));
+  assertEquals(0, x ^= x);
+  assertEquals(0, x %= ((tmp = -2243857462, tmp)/((((((2642220700.6673346)&x)*(tmp = 1454878837, tmp))|((-25825087.30002737)%(851535616.3479034)))<<(tmp = -697581582, tmp))%(tmp = 2248990486, tmp))));
+  assertEquals(0, x >>= (((x|(((tmp = -220437911, tmp)&((((255690498)*(((2993252642)>>>(tmp = 300426048.0338713, tmp))>>x))&((-364232989)+(x<<(-1824069275))))%(x+(tmp = 2696406059.026349, tmp))))+((tmp = 2911683270, tmp)/(tmp = 2718991915, tmp))))*(x/(((tmp = -982851060.0744538, tmp)^((-2903383954)<<((-85365803.80553412)^x)))%(1489258330.5730634))))>>>x));
+  assertEquals(0.7805921633088815, x += (((-1886920875)/(-2417294156.5304217))%(tmp = -1176793645.8923106, tmp)));
+  assertEquals(0, x <<= x);
+  assertEquals(-2215008905, x -= (2215008905));
+  assertEquals(1931542900, x &= (-215923724.72133207));
+  assertEquals(907191462, x ^= (-3133954606.357727));
+  assertEquals(453595731, x >>>= (((tmp = 2726241550, tmp)/(tmp = -332682163, tmp))*((((tmp = 2500467531, tmp)>>>(((x<<(tmp = -1847200310.4863105, tmp))/x)^x))+x)<<(191688342.22953415))));
+  assertEquals(-0.21671182880645923, x /= ((((-1169180683.1316955)%x)>>>(1650525418))^((2198033206.797462)&((-6913973.910871983)%(1758398541.8440342)))));
+  assertEquals(-375102237.1603561, x += (tmp = -375102236.9436443, tmp));
+  assertEquals(1, x &= (((84374105.89811504)|((tmp = -2480295008.926951, tmp)>>((605043461)>>(tmp = -2495122811, tmp))))>>(-2129266088)));
+  assertEquals(1, x |= x);
+  assertEquals(0.0000024171579540208214, x /= (((-2600416098)>>(-2076954196))^x));
+  assertEquals(0.0000024171579540208214, x %= (tmp = -2632420148.815531, tmp));
+  assertEquals(1809220936.0126908, x -= (-1809220936.0126884));
+  assertEquals(1682452118.2686126, x += (((2358977542)<<(x/(tmp = -2862107929, tmp)))+(x+(x%((-3101674407)/(((x*((x>>(tmp = 630458691.3736696, tmp))>>>(tmp = -852137742, tmp)))/x)-((-1875892391.1022017)&(tmp = -1027359748.9533749, tmp))))))));
+  assertEquals(1682452118, x <<= (((tmp = -80832958.07816291, tmp)>>x)%(x-((x^(x<<(tmp = -156565345, tmp)))|((tmp = -1208807363.727137, tmp)/(tmp = 2614737513.304538, tmp))))));
+  assertEquals(6572078, x >>= (-1573364824));
+  assertEquals(13144156, x += x);
+  assertEquals(1731678184, x ^= ((tmp = 593370804.9985657, tmp)|(-3124896848.53273)));
+  assertEquals(845545, x >>>= (tmp = -605637621.2299933, tmp));
+  assertEquals(-1383361088, x ^= (tmp = -1383632087, tmp));
+  assertEquals(-82545896480031520, x += ((x+(1023183845.7316296))*((((tmp = 576673669, tmp)>>(((-584800080.1625061)/(2388147521.9174623))+((((x>>>(-905032341.5830328))^(tmp = -2170356357, tmp))-x)+((136459319)+(-1799824119.689473)))))|x)&(tmp = -2688743506.0257063, tmp))));
+  assertEquals(-895206176, x |= x);
+  assertEquals(-0, x %= x);
+  assertEquals(1791306023, x ^= ((tmp = -3219480856, tmp)+(tmp = 715819582.0181161, tmp)));
+  assertEquals(1791306023, x &= x);
+  assertEquals(2725167636753240600, x *= (1521330025));
+  assertEquals(-281190679, x |= (tmp = -1422045975.798171, tmp));
+  assertEquals(-281190679, x += (x%x));
+  assertEquals(-2342097426.906673, x -= (tmp = 2060906747.906673, tmp));
+  assertEquals(-4651462701.906673, x -= (2309365275));
+  assertEquals(1878, x >>>= (2544974549.345834));
+  assertEquals(1964, x += (x&((1067649861)>>(182139255.7513579))));
+  assertEquals(2209, x += (x>>(tmp = -1775039165, tmp)));
+  assertEquals(0, x -= x);
+  assertEquals(-0, x /= (tmp = -1634697185, tmp));
+  assertEquals(NaN, x /= x);
+  assertEquals(0, x >>>= ((tmp = 3075747652, tmp)&(tmp = 819236484, tmp)));
+  assertEquals(0, x /= ((1276203810.476657)%(-2434960500.784484)));
+  assertEquals(0, x >>>= (tmp = -503633649, tmp));
+  assertEquals(-982731931, x |= (-982731931));
+  assertEquals(-1965463862, x += x);
+  assertEquals(-0.221469672913716, x %= ((tmp = -1742292120, tmp)/x));
+  assertEquals(-0.221469672913716, x %= (-2021391941.1839576));
+  assertEquals(0, x <<= (((((tmp = -2802447851, tmp)>>((2534456072.6518855)&x))%(tmp = 2841162496.610816, tmp))<<((89341820)/(2565367990.0552235)))>>(tmp = 2700250984.4830647, tmp)));
+  assertEquals(0, x >>= x);
+  assertEquals(0, x >>= ((tmp = -636189745, tmp)>>>(x/(((tmp = 2634252476, tmp)%(2026595795))>>(tmp = -2048078394.743723, tmp)))));
+  assertEquals(NaN, x %= ((x%((((x%((tmp = -2583207106, tmp)&x))|(190357769))<<(tmp = 595856931.2599536, tmp))%x))*((-2433186614.6715775)<<((2856869562.1088696)^(tmp = 1112328003, tmp)))));
+  assertEquals(1621713910, x |= (tmp = 1621713910.0282416, tmp));
+  assertEquals(3243427820, x += x);
+  assertEquals(0, x *= (x&(x-x)));
+  assertEquals(0, x >>>= (((2871235439)<<((x+((tmp = -1319445828.9659343, tmp)+(tmp = 1595655077.959171, tmp)))>>(tmp = -86333903, tmp)))-(x/(2907174373.268768))));
+  assertEquals(0, x >>= (-1091774077.2173789));
+  assertEquals(NaN, x /= x);
+  assertEquals(NaN, x *= (tmp = 1976023677.7015994, tmp));
+  assertEquals(NaN, x -= (-3013707698));
+  assertEquals(NaN, x += ((x+(((tmp = -3119865782.9691515, tmp)<<(1327383504.0158405))^(((-143382411.7239611)>>>((-2157016781)+(((-335815848)/x)<<(tmp = 1953515427, tmp))))&(-2715729178))))/(413738158.2334299)));
+  assertEquals(NaN, x %= x);
+  assertEquals(NaN, x += (-845480493));
+  assertEquals(-789816013, x |= (tmp = -789816013.129916, tmp));
+  assertEquals(0, x ^= x);
+  assertEquals(0, x <<= (3032573320));
+  assertEquals(47630, x ^= ((1086705488)%((x^(tmp = -1610832418, tmp))>>>(tmp = 1136352558, tmp))));
+  assertEquals(47630, x >>= (tmp = 1035320352.4269229, tmp));
+  assertEquals(47630, x >>= ((((x^x)<<(x*((((x&((-1657468419)*((tmp = -674435523, tmp)&((tmp = 2992300334, tmp)|x))))*((tmp = -489509378.31950426, tmp)*(tmp = 2276316053, tmp)))>>>x)<<x)))%(tmp = -1209988989, tmp))/(tmp = -2080515253.3541622, tmp)));
+  assertEquals(3192518951.8129544, x += (3192471321.8129544));
+  assertEquals(648116457.8129544, x %= (-2544402494));
+  assertEquals(0, x -= x);
+  assertEquals(NaN, x /= x);
+  assertEquals(NaN, x /= x);
+  assertEquals(0, x <<= x);
+  assertEquals(0, x >>= x);
+  assertEquals(0, x *= (tmp = 30051865, tmp));
+  assertEquals(0, x ^= ((x&(((x&x)>>>(((((((x+(2319551861.0414495))>>>(tmp = -3099624461, tmp))^((((tmp = 1574312763, tmp)|x)>>>((-2723797246)&(tmp = -1993956152, tmp)))|(-1830179045)))|(((((((-2545698704.3662167)>>>x)-(((-79478653)|x)%(x+(x>>((tmp = 2386405508.2180576, tmp)/x)))))>>((((-1947911815.2808042)*((x+(368522081.2884482))-(tmp = 2452991210, tmp)))>>(343556643.1123545))>>((((tmp = 1869261547.537739, tmp)>>(3193214755))|x)&(x*(2027025120)))))<<((-1149196187)>>>(814378291.8374172)))+((((((((-160721403)/(2079201480.2186408))+((x|((((tmp = -299595483.16805863, tmp)>>>((x|((x+x)/(-2359032023.9366207)))<<(tmp = -3095108545, tmp)))>>((tmp = -1547963617.9087071, tmp)*(x>>x)))&((tmp = -1568186648.7499216, tmp)+(((2646528453)^(-2004832723.0506048))>>>(tmp = -3188715603.921877, tmp)))))+(tmp = 1578824724, tmp)))^x)^x)/(tmp = -985331362, tmp))|(tmp = 445135036, tmp))<<(tmp = -73386074.43413758, tmp)))+(((-1674995105.9837937)-(tmp = 1392915573, tmp))>>x)))%(tmp = 1215953864, tmp))&((tmp = -439264643.5238693, tmp)>>>x))+(((tmp = 2311895902, tmp)|(1604405793.6399229))&(tmp = -565192829, tmp))))-x))>>(-2455985321)));
+  assertEquals(0, x %= ((1177798817)>>(tmp = 2081394163.5420477, tmp)));
+  assertEquals(0, x >>>= ((x^(tmp = -41947528.33954811, tmp))>>(x>>>((tmp = 1367644771, tmp)+x))));
+  assertEquals(0, x %= ((x+((tmp = 163275724, tmp)<<((tmp = -514460883.3040788, tmp)+x)))|(tmp = -287112073.2482593, tmp)));
+  assertEquals(0, x &= (3067975906));
+  assertEquals(201342051, x |= (tmp = 201342051, tmp));
+  assertEquals(0, x %= (((((-2580351108.8990865)<<(tmp = 2675329316, tmp))&((1338398946)%((-1548041558)+((x>>(-1568233868.7366815))|((x>>((tmp = -1064582207, tmp)/(-1062237014)))>>(tmp = 854123209, tmp))))))<<(((989032887)*(1842748656))%(tmp = -1566983130, tmp)))-x));
+  assertEquals(-0, x /= (tmp = -828519512.617768, tmp));
+  assertEquals(0, x &= ((((1449608518)+(-1829731972))*(1828894311))*(((tmp = -1121326205.614264, tmp)^(-2057547855))<<(tmp = -2758835896, tmp))));
+  assertEquals(NaN, x %= ((tmp = -2138671333, tmp)%x));
+  assertEquals(0, x &= x);
+  assertEquals(665568613.0328879, x += (665568613.0328879));
+  assertEquals(317, x >>= (2627267349.735873));
+  assertEquals(0, x -= x);
+  assertEquals(0, x &= (((tmp = 3030611035, tmp)*(((tmp = 476143340.933007, tmp)>>(x-(2238302130.2331467)))|(x|x)))%(tmp = 320526262, tmp)));
+  assertEquals(0, x <<= (tmp = 729401206, tmp));
+  assertEquals(0, x >>>= (1721412276));
+  assertEquals(217629949.3530736, x += ((tmp = 217629949.3530736, tmp)%((-931931100.601475)%(x^(tmp = -2149340123.548764, tmp)))));
+  assertEquals(217629949.3530736, x %= (tmp = 2275384959.4243402, tmp));
+  assertEquals(0, x >>>= (1112677437.5524077));
+  assertEquals(0, x *= (500256656.7476063));
+  assertEquals(0, x >>>= x);
+  assertEquals(0, x -= x);
+  assertEquals(0, x -= x);
+  assertEquals(0, x &= (-1076968794));
+  assertEquals(0, x /= (tmp = 1774420931.0082943, tmp));
+  assertEquals(0, x |= x);
+  assertEquals(0, x >>= x);
+  assertEquals(0, x %= (-2978890122.943079));
+  assertEquals(-0, x /= (tmp = -2954608787, tmp));
+  assertEquals(-800048201, x ^= ((tmp = -800048201.7227018, tmp)>>>((-2016227566.1480863)/(tmp = -2263395521, tmp))));
+  assertEquals(3333, x >>>= (-2038839052));
+  assertEquals(487957736.625432, x += (487954403.625432));
+  assertEquals(-1650983426, x |= (2643918270));
+  assertEquals(-1861867448, x &= (tmp = -251254199.12813115, tmp));
+  assertEquals(-7.934314690172143e-18, x %= ((((x^(-703896560.6519544))>>(tmp = -1853262409, tmp))/(tmp = -1168012152.177894, tmp))/(tmp = 837616075.1097361, tmp)));
+  assertEquals(0, x ^= x);
+  assertEquals(0, x &= (tmp = -2328150260.5399947, tmp));
+  assertEquals(-1954860020, x |= (tmp = 2340107276, tmp));
+  assertEquals(-1954860020, x >>= ((tmp = 159177341, tmp)*(x&(-705832619))));
+  assertEquals(-1954895727, x -= (x>>>((-1443742544.7183702)^((((tmp = 869581714.0137681, tmp)+x)^((x%(tmp = -1036566362.5189383, tmp))^(x%x)))>>x))));
+  assertEquals(1.0241361338078498, x /= (tmp = -1908824093.2692068, tmp));
+  assertEquals(16777216, x <<= (x*(((-1925197281)^(tmp = -1392300089.4750946, tmp))|x)));
+  assertEquals(-225882765524992, x *= (tmp = -13463662, tmp));
+  assertEquals(-1845493760, x |= x);
+  assertEquals(-1845493760, x %= (tmp = 3181618519.786825, tmp));
+  assertEquals(0, x ^= x);
+  assertEquals(0, x <<= x);
+  assertEquals(0, x >>>= x);
+  assertEquals(NaN, x /= (x>>>x));
+  assertEquals(NaN, x %= (((((tmp = -521176477, tmp)>>(((tmp = 370693623, tmp)/(((tmp = -1181033022.4136918, tmp)>>(x|(x*(2601660441))))+(tmp = -1696992780, tmp)))|(x|(-1197454193.198036))))>>>(((2512453418.3855605)+((((((tmp = 799501914, tmp)&(((1788580469.7069902)*(((((1476778529.5109258)<<(tmp = -1873387738.3541565, tmp))-((tmp = -521988584.7945764, tmp)*(-1598785351.3914914)))&(-1899161721.8061454))&((x/x)*(690506460))))>>>((tmp = 2255896398.840741, tmp)>>((tmp = -1331486014.6180065, tmp)+(-1159698058.534132)))))*((1112115365.2633948)&((x>>((x>>(-784426389.4693215))&(-492064338.97227573)))>>x)))^((x-((tmp = 2986028023, tmp)>>(tmp = 2347380320.00517, tmp)))*(tmp = -1463851121, tmp)))*(tmp = -1059437133, tmp))%(x-(tmp = 1238739493.7636225, tmp))))^(2029235174)))*(-1923899530))>>>x));
+  assertEquals(0, x >>>= (2848792983.510682));
+  assertEquals(0, x >>= (((tmp = 3042817032.705198, tmp)>>>x)&((((tmp = -829389221, tmp)-((2669682285.8576303)+(tmp = 1812236814.3082042, tmp)))^x)%((tmp = -2401726554, tmp)^((tmp = 2464685683, tmp)|(-2685039620.224061))))));
+  assertEquals(2069649722, x |= (2069649722.311271));
+  assertEquals(NaN, x %= (((((-68757739.39282179)&(-1382816369))/(3122326124))<<(x-(-507995800.3369653)))<<(((-1962768567.343907)+((tmp = 1357057125, tmp)/x))^(tmp = 1997617124, tmp))));
+  assertEquals(NaN, x += x);
+  assertEquals(0, x >>= (26895919));
+  assertEquals(0, x >>>= x);
+  assertEquals(0, x %= (tmp = 1092448030, tmp));
+  assertEquals(0, x <<= (tmp = -477672441.46258235, tmp));
+  assertEquals(0, x /= (2113701907));
+  assertEquals(0, x >>>= x);
+  assertEquals(NaN, x /= x);
+  assertEquals(1341078673, x |= (-2953888623));
+  assertEquals(1341078673, x &= x);
+  assertEquals(0, x %= x);
+  assertEquals(414817852.151006, x -= (-414817852.151006));
+  assertEquals(1006632960, x <<= ((((((126465614.8316778)+(x-(2511803375)))+(tmp = 1620717148.352402, tmp))*x)/(tmp = -3013745105.5275207, tmp))-((tmp = -418034061.6865432, tmp)/(-300492911))));
+  assertEquals(1055624813, x |= (tmp = 921407085, tmp));
+  assertEquals(-3, x |= ((((tmp = 1382397819.7507677, tmp)+(tmp = -111851147.7289567, tmp))+x)/((tmp = 247980405.7238742, tmp)^(tmp = -592156399.8577058, tmp))));
+  assertEquals(35161, x &= (((((((-2973570544.725141)*(tmp = -1244715638, tmp))+x)<<(x/((x>>>(-2143371615.073137))/(226072236))))%((x-(tmp = 1971392936, tmp))^(tmp = 2653103658, tmp)))%((tmp = 2828319571.7066674, tmp)>>((1528970502)^((tmp = -55869558, tmp)%x))))>>(889380585.6738582)));
+  assertEquals(0, x ^= x);
+  assertEquals(0, x *= (2749718750));
+  assertEquals(0, x >>>= ((((-1633495402.6252813)*(tmp = 2943656739.1108646, tmp))+(tmp = 977432165, tmp))&((tmp = -2338132019, tmp)*(408176349.8061733))));
+  assertEquals(-1778794752, x -= (((tmp = -1391412154.5199084, tmp)-((-3172342474)|x))&(1854366052)));
+  assertEquals(-1778794752, x %= (tmp = 2024807296.6901965, tmp));
+  assertEquals(-1114410.466337204, x %= ((tmp = -240344444.24487805, tmp)%(-47661164)));
+  assertEquals(-0, x %= x);
+  assertEquals(0, x >>= (x>>x));
+  assertEquals(0, x *= x);
+  assertEquals(0, x /= ((-3134902611)|(tmp = -3131158951, tmp)));
+  assertEquals(-0, x /= (((tmp = 1430247610.634234, tmp)&x)+((tmp = -2047191110.8623483, tmp)-((((x%((((x/(tmp = -2599234213, tmp))|(tmp = 2650380060, tmp))|x)+x))>>>x)&(-1961373866))<<x))));
+  assertEquals(-718394682, x -= ((x|(tmp = 1764417670.8577194, tmp))%(1046022988)));
+  assertEquals(3576572614, x >>>= (((tmp = 2480472883.078992, tmp)<<x)>>((2035208402.8039393)&(tmp = 492980449, tmp))));
+  assertEquals(434034142, x %= (x&((x>>>(311110449.48751545))|(-243530647))));
+  assertEquals(524703439.3065736, x += (((tmp = 1392771723.3065736, tmp)%(x&x))%(tmp = -2199704930, tmp)));
+  assertEquals(373686272, x &= (x<<((tmp = 2103372351.9456532, tmp)%(tmp = -1367109519, tmp))));
+  assertEquals(373686272, x >>= x);
+  assertEquals(-0.12245430020241108, x /= (tmp = -3051638622.5907507, tmp));
+  assertEquals(1, x /= x);
+  assertEquals(1, x %= (3095983855));
+  assertEquals(-1454736871, x ^= (x*(tmp = -1454736872, tmp)));
+  assertEquals(-1454736866, x ^= (((724989405.7338341)|(tmp = -2834298786.384371, tmp))>>>(tmp = -2029602148.1758833, tmp)));
+  assertEquals(-1454736866, x &= x);
+  assertEquals(-197394432, x <<= (tmp = -1562128975, tmp));
+  assertEquals(251658240, x <<= (tmp = 2126510950, tmp));
+  assertEquals(3295700610.703306, x -= (tmp = -3044042370.703306, tmp));
+  assertEquals(-51152917, x |= ((949179883.1784958)|(((tmp = -2046168220, tmp)>>(x/x))/(((835064313)*(tmp = 2197600689, tmp))^(((tmp = 2717104216, tmp)&x)<<(-1402661995.3845913))))));
+  assertEquals(-1549204421, x ^= ((((tmp = -481013711, tmp)>>>((tmp = 119589341.80209589, tmp)%(-995489985.2905662)))-(635717011))^(x+(x*x))));
+  assertEquals(-1078356672.3999934, x += (470847748.6000067));
+  assertEquals(1484987268.4638166, x += (tmp = 2563343940.86381, tmp));
+  assertEquals(277020804, x &= (tmp = 2532819117, tmp));
+  assertEquals(-2097118208, x <<= (x>>>x));
+  assertEquals(-2147483648, x <<= (tmp = 761285045, tmp));
+  assertEquals(2147483648, x >>>= x);
+  assertEquals(-935909870282997800, x *= ((-2583300643)|x));
+  assertEquals(-370753566.54721737, x %= (-1084543510.4524941));
+  assertEquals(-177, x >>= (-946264747.6588805));
+  assertEquals(-416077682, x ^= (tmp = 416077761, tmp));
+  assertEquals(NaN, x %= ((((tmp = 779607408, tmp)*(((tmp = -3007128117, tmp)*(851442866.6153773))+x))&(1283388806))/(-876363553)));
+  assertEquals(NaN, x %= (x/(tmp = -1668413939.652408, tmp)));
+  assertEquals(-1726405921, x ^= (tmp = -1726405921, tmp));
+  assertEquals(-1, x >>= ((3031008213.807012)>>x));
+  assertEquals(4294967295, x >>>= ((x>>>x)&(tmp = 2788082290, tmp)));
+  assertEquals(8544111670008449000, x *= (tmp = 1989331020.0417833, tmp));
+  assertEquals(268435456, x <<= (tmp = 3121736017.2098465, tmp));
+  assertEquals(-2.1011176170964474e+26, x -= (((tmp = 1392503299, tmp)*(tmp = 1446108825.1572113, tmp))*(x^(tmp = 372776014.213725, tmp))));
+  assertEquals(0, x |= x);
+  assertEquals(0, x >>= ((-112413907.70074797)*(-702798603)));
+  assertEquals(1829518838, x |= (tmp = -2465448458, tmp));
+  assertEquals(57172463, x >>= ((tmp = 2979642955.241792, tmp)%(tmp = -2464398693.291434, tmp)));
+  assertEquals(114344926, x += x);
+  assertEquals(113279134, x &= (2397742238.6877637));
+  assertEquals(54, x >>= (1908522709.6377516));
+  assertEquals(-2.966982919573829e-7, x /= (tmp = -182003070, tmp));
+  assertEquals(0, x <<= (-1078417156));
+  assertEquals(-147831390, x ^= (((-147831390)>>>x)+x));
+  assertEquals(0, x -= x);
+  assertEquals(-242221450.44696307, x -= (tmp = 242221450.44696307, tmp));
+  assertEquals(-484442900, x <<= (((tmp = -2033947265.088614, tmp)&x)/(x^(tmp = -2893953848, tmp))));
+  assertEquals(-3227648, x <<= (x<<((tmp = -193993010, tmp)*((983187830)|(3146465242.2783365)))));
+  assertEquals(-6455296, x += x);
+  assertEquals(-1771542585, x -= (x^(tmp = -1767335879, tmp)));
+  assertEquals(-0, x %= x);
+  assertEquals(0, x >>>= ((((tmp = -1612864670.4532743, tmp)*(tmp = 786265765.210487, tmp))*((((tmp = -893735877.3250401, tmp)*((x^(tmp = -2804782464.233885, tmp))<<x))&(x-x))^x))<<x));
+  assertEquals(0, x -= (x>>>(-1648118674.380736)));
+  assertEquals(0, x >>= ((tmp = -2706058813.0028524, tmp)>>(2745047169)));
+  assertEquals(0, x += x);
+  assertEquals(0, x %= (-898267735.137356));
+  assertEquals(0, x >>>= x);
+  assertEquals(0, x >>= ((265527509)/((tmp = 2190845136.7048635, tmp)+((x>>x)>>>((x%(x-x))&((((-2080184609.8989801)&((-327231633)>>>((tmp = 864849136, tmp)%(((-524363239)*(((((tmp = 2245852565.3713694, tmp)&(1918365.8978698254))>>>(tmp = -2463081769, tmp))-(((2438244059.471446)|((((-135303645.38470244)*(-861663832.2253196))%(tmp = 1273185196.0261836, tmp))|((2261539338.832875)%((320267076.2363237)+x))))>>(tmp = -2731398821, tmp)))/(tmp = -1947938611, tmp)))^x))))>>(tmp = 833666235, tmp))|x))))));
+  assertEquals(-1116704570, x ^= (-1116704570));
+  assertEquals(1379561710, x ^= (tmp = -280362968.19654894, tmp));
+  assertEquals(-1673822208, x <<= x);
+  assertEquals(-1673822208, x |= (x<<(tmp = 1389479193.9038138, tmp)));
+  assertEquals(2559712, x >>>= (-2703763734.0354066));
+  assertEquals(2593499, x ^= (x>>>((tmp = 148668150.03291285, tmp)^(tmp = -1580360304, tmp))));
+  assertEquals(2070393855, x |= (tmp = -2227002907, tmp));
+  assertEquals(304197770, x &= (tmp = 2453257354, tmp));
+  assertEquals(304197770, x <<= ((-669331453.8814087)-(x^(x^(tmp = 33804899.98928583, tmp)))));
+  assertEquals(297068, x >>= x);
+  assertEquals(Infinity, x /= (x-x));
+  assertEquals(NaN, x %= x);
+  assertEquals(0, x ^= x);
+  assertEquals(0, x %= ((tmp = 1723087085, tmp)%(2859382131.304421)));
+  assertEquals(0, x %= (((tmp = 2935439763, tmp)<<(-3163992768.637094))%(tmp = 67176733, tmp)));
+  assertEquals(0, x &= (tmp = 2480771277, tmp));
+  assertEquals(0, x >>>= (x+(tmp = -3168690063, tmp)));
+  assertEquals(0, x *= ((tmp = -1915275449.1806245, tmp)>>>((tmp = -1644482094.1822858, tmp)/(tmp = -432927173, tmp))));
+  assertEquals(0, x += (((2766509428.071809)/(x/((942453848.5423365)/(((tmp = -1284574492, tmp)&((tmp = 760186450.7301528, tmp)-(2464974117.358138)))/((x/(x|(672536969)))*(x>>(-1272232579)))))))>>(x*(-3175565978))));
+  assertEquals(-1277710521, x -= (1277710521));
+  assertEquals(-1277710521, x >>= (((tmp = -2349135858, tmp)-x)-x));
+  assertEquals(-1277710521, x >>= ((tmp = 2135645051, tmp)*(tmp = -2468555366, tmp)));
+  assertEquals(-155971, x >>= (-1294859507));
+  assertEquals(-0, x %= x);
+  assertEquals(0, x >>>= (((861078292.6597499)|(-268063679))-(((((-221864206.9494424)-(-3186868203.2201176))&(tmp = 1287132927, tmp))<<(((tmp = 1964887915, tmp)<<((25908382)^(tmp = -688293519.875164, tmp)))*(2075946055)))&(x-((x>>x)&(1395338223.7954774))))));
+  assertEquals(788002218, x -= (-788002218));
+  assertEquals(716399906, x &= (-1145868506));
+  assertEquals(145776674, x &= (-1661931477.360386));
+  assertEquals(145776674, x |= x);
+  assertEquals(-0.05255700469257692, x /= (tmp = -2773686873, tmp));
+  assertEquals(-660918434, x |= (-660918434.2915542));
+  assertEquals(1223537346, x ^= (tmp = -1871274596, tmp));
+  assertEquals(305884336, x >>= (x&x));
+  assertEquals(-1.1123775647978218e-8, x *= ((tmp = -793393031.4229445, tmp)/((tmp = -503919284, tmp)*(((((tmp = 429810625, tmp)>>>x)-((2091544148.870375)<<(((((x^x)%x)|x)/(-260773261))<<((tmp = -1323834653, tmp)&x))))*((-1231800099.3724015)+x))*((x+((-559726167)^x))>>>((-549148877)<<((((tmp = 1196115201, tmp)/((tmp = -2654658968.390111, tmp)%(tmp = -1044419580, tmp)))*(((((x>>>(733571228))+(2919762692.511447))/(-2718451983.570547))^x)+((2891533060.1804514)^((tmp = -2514488663, tmp)&x))))<<(tmp = -2526139641.6733007, tmp))))))));
+  assertEquals(0, x >>>= x);
+  assertEquals(0, x *= x);
+  assertEquals(0, x |= x);
+  assertEquals(3076984066.336236, x -= ((tmp = -3076984066.336236, tmp)+((tmp = -446575828.5155368, tmp)&x)));
+  assertEquals(1, x /= x);
+  assertEquals(1513281647.839972, x *= (1513281647.839972));
+  assertEquals(1251138155, x ^= ((tmp = 2124481052, tmp)&(2431937351.4392214)));
+  assertEquals(1, x /= x);
+  assertEquals(0, x &= (tmp = 627050040, tmp));
+  assertEquals(497153016, x ^= (497153016));
+  assertEquals(-1112801283, x |= (tmp = 2752196557, tmp));
+  assertEquals(0.5735447276296568, x /= ((((tmp = -500878794, tmp)%(tmp = -2559962372.2930336, tmp))%(2661010102))+(tmp = -1439338297, tmp)));
+  assertEquals(1.0244795995097235e-9, x /= (559840067));
+  assertEquals(0.43468811912309857, x *= (424301391));
+  assertEquals(-1972757928, x ^= (tmp = -1972757928.9227014, tmp));
+  assertEquals(-606757265, x ^= (tmp = -2923461577.264596, tmp));
+  assertEquals(-37, x >>= (((-2736561559.7474318)%(tmp = -27668972.662741184, tmp))*(2774711606)));
+  assertEquals(-1923785671, x += ((-1923785597)+x));
+  assertEquals(-3877639176, x += (tmp = -1953853505, tmp));
+  assertEquals(-4688259242, x -= ((810620066.4394455)>>(((-1474285107.459875)>>x)/(((((-570672326.4007359)>>(tmp = -3086802075, tmp))%x)>>>(((tmp = 286938819.28193486, tmp)>>>((1712478502)>>(tmp = 3045149117.796816, tmp)))<<(tmp = 750463263.292952, tmp)))&(tmp = 2055350255.5669963, tmp)))));
+  assertEquals(-0, x %= x);
+  assertEquals(0, x <<= (1037856162.5105649));
+  assertEquals(0, x *= x);
+  assertEquals(0, x &= (997845077.4917375));
+  assertEquals(0, x *= x);
+  assertEquals(0, x *= x);
+  assertEquals(0, x <<= (((x<<x)&(57691805))>>(786927663)));
+  assertEquals(0, x ^= x);
+  assertEquals(0, x += x);
+  assertEquals(0, x &= (-2131910624.1429484));
+  assertEquals(0, x >>>= (-43787814));
+  assertEquals(-2415062021, x += (tmp = -2415062021, tmp));
+  assertEquals(-4830124042, x += x);
+  assertEquals(-186683401, x |= (tmp = 1960135383, tmp));
+  assertEquals(NaN, x *= ((tmp = -1674740173.9864025, tmp)%(((((((-432895485.7261934)-x)^x)>>>(((-1627743078.3383338)>>(179992151))<<((tmp = 911484278.0555259, tmp)|(((tmp = -3042492703, tmp)>>(((-663866035.302746)>>(((x-((440661929.50030375)>>>(tmp = 263692082, tmp)))*x)+x))/((1546004407)^(((tmp = 2023662889.1594632, tmp)*(tmp = -2456602312, tmp))+(tmp = 755602286.1810379, tmp)))))%((tmp = -336449961, tmp)|(tmp = 206780145, tmp))))))/(1068005219.1508512))<<(tmp = -474008862.6864624, tmp))/(((((((1518711056.5437899)>>>(tmp = 287418286.63085747, tmp))<<(tmp = 2823048707, tmp))^(((x<<(x^(-1600970311)))&(x>>(((tmp = 157300110.7636031, tmp)*(tmp = -3047000529, tmp))&(1743024951.3535223))))>>x))-(tmp = -2895435807, tmp))*((tmp = -314120704, tmp)&(tmp = 1759205369, tmp)))>>(tmp = 1833555960.046526, tmp)))));
+  assertEquals(NaN, x -= (tmp = 694955369, tmp));
+  assertEquals(NaN, x *= (x%x));
+  assertEquals(0, x |= x);
+  assertEquals(0, x ^= x);
+  assertEquals(0, x &= x);
+  assertEquals(NaN, x /= (x+x));
+  assertEquals(NaN, x %= ((tmp = -1595988845, tmp)*((1754043345)>>>(-601631332))));
+  assertEquals(0, x >>>= (tmp = 862768754.5445609, tmp));
+  assertEquals(NaN, x /= x);
+  assertEquals(NaN, x %= x);
+  assertEquals(NaN, x *= (tmp = -1774545519, tmp));
+  assertEquals(0, x >>>= (tmp = -2492937784, tmp));
+  assertEquals(0, x %= ((((x<<(-1657262788.2028513))&((x^(tmp = -671811451, tmp))<<(-2984124996)))^(1455422699.7504625))-((-340550620)>>x)));
+  assertEquals(918278025, x ^= ((tmp = -918278027, tmp)^((tmp = 2889422870, tmp)/(tmp = -657306935.7725658, tmp))));
+  assertEquals(918278025, x %= (2603186571.0582614));
+  assertEquals(107034679.32509923, x %= (tmp = -811243345.6749008, tmp));
+  assertEquals(53517339, x >>= (x%((((x*((tmp = -983766424, tmp)^(-1881545357.8686862)))|(tmp = -1429937087, tmp))>>((x<<x)>>((((tmp = -2347470476, tmp)&x)+((x&x)<<(396061331.6476157)))*(tmp = -3136296453.209073, tmp))))>>>(((tmp = 908427836, tmp)|(tmp = 207737064, tmp))|(((1253036041)-(tmp = 2705074182, tmp))+(-431215157.82083917))))));
+  assertEquals(53477378, x &= ((((-1128036654.165636)*x)+x)>>(x>>(3080099059))));
+  assertEquals(0, x >>= (-590692293));
+  assertEquals(0, x %= (-2395850570.9700127));
+  assertEquals(0, x *= ((tmp = 1377485272, tmp)&(1129370608)));
+  assertEquals(0, x += (x>>>(x%(((((tmp = -1746827236, tmp)+((tmp = -326913490, tmp)&((-58256967)&x)))*(tmp = -1176487022.001651, tmp))>>>(-2089147643))-x))));
+  assertEquals(0, x <<= (tmp = 1073298160.2914447, tmp));
+  assertEquals(-837811832, x ^= (-837811832));
+  assertEquals(102760448, x <<= (tmp = 2833582450.4544373, tmp));
+  assertEquals(0, x &= (((((((tmp = 2595641175, tmp)*x)+(tmp = -2049260172.1025927, tmp))%((2986747823)>>(tmp = -2120598518, tmp)))&((tmp = -2742408622, tmp)&x))>>x)*((1043474247.9601482)&(tmp = 1686365779.9885998, tmp))));
+  assertEquals(0, x >>= ((tmp = 1717862848, tmp)-(tmp = 1077024446.4160957, tmp)));
+  assertEquals(NaN, x /= x);
+  assertEquals(NaN, x /= (-1669429787.975099));
+  assertEquals(NaN, x -= (-2299895633.4807186));
+  assertEquals(138173970, x ^= (138173970.56627905));
+  assertEquals(-2084183776, x <<= (3073345316));
+  assertEquals(-0, x %= x);
+  assertEquals(0, x >>= (-3080556066.068573));
+  assertEquals(0, x &= ((tmp = -2587514820, tmp)*(x-((x^(1995672257))*(1125326747.2339358)))));
+  assertEquals(NaN, x %= x);
+  assertEquals(0, x >>= (tmp = 2139186585, tmp));
+  assertEquals(-1904096640, x |= ((-602301360.1919911)*(-1270444810)));
+  assertEquals(1073741824, x <<= (tmp = -1069467849, tmp));
+  assertEquals(1073741824, x ^= (x-x));
+  assertEquals(536870912, x >>>= (-1579466367.160293));
+  assertEquals(512, x >>= (972402804.3890183));
+  assertEquals(512, x &= (tmp = 2664796831, tmp));
+  assertEquals(16777216, x <<= (-2738292561));
+  assertEquals(0, x >>>= ((((1397663615.3889246)|(1117420260.6730964))-(-1173734560))<<((tmp = 1007006104.0172879, tmp)<<((tmp = -623002097, tmp)%(tmp = -35829654.379403114, tmp)))));
+  assertEquals(1200191544, x ^= (tmp = -3094775752, tmp));
+  assertEquals(71, x >>>= x);
+  assertEquals(71, x |= x);
+  assertEquals(1394763772, x += (1394763701));
+  assertEquals(-1.492717171027427, x /= ((x&(tmp = 1243787435, tmp))-(2043911970.26752)));
+  assertEquals(-1.1002448961224718e-8, x /= ((((835185744)*(((tmp = 2165818437, tmp)^(tmp = 2567417009.1166553, tmp))/x))/x)/(((63485842.39971793)^(2668248282.597389))/x)));
+  assertEquals(0, x <<= (tmp = 1598238578.637568, tmp));
+  assertEquals(0, x |= (x&((tmp = -1812945547.5373957, tmp)>>>x)));
+  assertEquals(0, x >>>= (x+(-1969679729.7299538)));
+  assertEquals(1582033662, x += (tmp = 1582033662, tmp));
+  assertEquals(1, x >>>= x);
+  assertEquals(-550748739, x += ((tmp = -550748740, tmp)/(x&((2537822642.235506)^((-2167656297)%(tmp = 1161201210, tmp))))));
+  assertEquals(-268921, x >>= (tmp = 1916069547.7381654, tmp));
+  assertEquals(-0.00021776939364231114, x /= (tmp = 1234888868, tmp));
+  assertEquals(0, x <<= (-1036375023));
+  assertEquals(0, x &= ((((x/(2398886792.27443))&(x|((-1813057854.1797302)-x)))&(x/(((tmp = 3091133731.4967556, tmp)|(3013139691.823039))<<x)))>>>(2542784636.963599)));
+  assertEquals(0, x += ((x*x)/(tmp = 347079383, tmp)));
+  assertEquals(788347904, x |= ((1462257124.6374629)*((3180592147.4065146)-(x&(1922244678)))));
+  assertEquals(2130672735, x |= (tmp = -2846986145, tmp));
+  assertEquals(-1331327970, x ^= ((656251304)-(tmp = 1489152359, tmp)));
+  assertEquals(-0.14377179742889856, x %= (((2889747597.813753)-(1730428996))/(((tmp = -1378710998, tmp)&x)|x)));
+  assertEquals(-1754612583.143772, x += ((-1754725729)^((-2285838408)>>>(1434074349))));
+  assertEquals(-0, x %= x);
+  assertEquals(0, x &= (tmp = -1031961332, tmp));
+  assertEquals(NaN, x /= x);
+  assertEquals(NaN, x /= (3059476325));
+  assertEquals(NaN, x *= ((x*((((tmp = 13529540.462185979, tmp)&x)^((x<<(-1312696238.1628869))&(-2029766712.3852897)))>>x))/x));
+  assertEquals(1657339940, x ^= ((tmp = -488956817.1491232, tmp)&(tmp = -2352413900.1983714, tmp)));
+  assertEquals(-530683621952432200, x *= (tmp = -320202035.2882054, tmp));
+  assertEquals(229226258, x ^= ((tmp = -1263410990.026416, tmp)+(((-808046349)&(tmp = -1294442506, tmp))&((tmp = 1147437219, tmp)<<((tmp = -820299900, tmp)-(tmp = -1947748943.3443851, tmp))))));
+  assertEquals(7163320, x >>= (-2631307131));
+  assertEquals(-68, x |= (((-1271721343)>>x)%x));
+  assertEquals(-39956523818.38862, x *= (587595938.505715));
+  assertEquals(0, x -= x);
+  assertEquals(0, x >>>= ((x^(x+x))<<(tmp = 265212367, tmp)));
+  assertEquals(0, x |= (((x>>((tmp = 2294761023, tmp)/(x>>(2125624288))))&((-2125650113)|(tmp = 1014409884, tmp)))%(tmp = -527324757, tmp)));
+  assertEquals(0, x >>= ((tmp = 2267075595, tmp)*(-1681569641.8304193)));
+  assertEquals(0, x >>>= x);
+  assertEquals(0.5738410949707031, x -= ((tmp = -1846572645.573841, tmp)%((((((x^(((-156613905.64173532)/x)<<x))+((x|((2405109060)>>>x))^x))/(570585894.8542807))+(x&(-2544708558)))^((((tmp = -2539082152.490635, tmp)+((((-657138283)/(2204743293))-((tmp = -1422552246.565012, tmp)+x))<<(x-x)))>>(x/(x>>>(tmp = -3027022305.484394, tmp))))<<x))&((-2066650303.3258202)/(tmp = -1666842593.0050385, tmp)))));
+  assertEquals(0, x >>>= ((((tmp = 2473451837.613817, tmp)>>((2526373359.1434193)>>(x<<x)))+((tmp = -579162065, tmp)+((tmp = -3115798169.551487, tmp)-(tmp = 933004398.9618305, tmp))))&(tmp = 131167062, tmp)));
+  assertEquals(-2067675316, x ^= (-2067675316.6300585));
+  assertEquals(543772, x >>>= x);
+  assertEquals(-1073741824, x <<= x);
+  assertEquals(3221225472, x >>>= ((x*(1478586441.081221))&(tmp = -3050416829.2279186, tmp)));
+  assertEquals(0, x ^= x);
+  assertEquals(0, x *= x);
+  assertEquals(-1017771903.0298333, x -= (1017771903.0298333));
+  assertEquals(0.6404112721149928, x /= ((tmp = -144667370, tmp)^(-2849599562)));
+  assertEquals(-2410517638773644000, x -= (((tmp = 1759631550, tmp)*x)*((((tmp = -2949481475, tmp)>>>x)*x)|(tmp = -2977983804, tmp))));
+  assertEquals(-0, x %= (x+((((tmp = -1307866327.7569134, tmp)<<((x&((tmp = -2380043169.8405933, tmp)|x))>>(472992789.7639668)))|(((((x<<(tmp = -1416427232.7298179, tmp))%(-1404989679.409946))*((x/(tmp = -992416608, tmp))/(tmp = 524646495, tmp)))-(tmp = 734405570, tmp))>>x))/(1079256317.7325506))));
+  assertEquals(0, x <<= (tmp = 2459834668, tmp));
+  assertEquals(-0, x /= (tmp = -1892164840.5719755, tmp));
+  assertEquals(0, x >>= (x|(((1299844244)>>>(((tmp = -2422924469.9824634, tmp)|x)-((((1914590293.2194016)+(-3033885853.8243046))-((tmp = -1720088308, tmp)%x))<<(tmp = 2210817619, tmp))))<<x)));
+  assertEquals(0, x <<= (((tmp = 3192483902.841396, tmp)>>>(((x^(2944537154))|(tmp = -1334426566, tmp))*(((((((-2705218389)&x)+(1987320749))+(tmp = -111851605, tmp))|(2894234323))-(265580345))&x)))%(((tmp = 1431928204.6987057, tmp)&(tmp = 914901046, tmp))&(x>>>x))));
+  assertEquals(0, x >>>= (tmp = 1941940941, tmp));
+  assertEquals(0, x %= (3089014384));
+  assertEquals(0, x += ((tmp = 2948646615, tmp)*x));
+  assertEquals(-0, x /= (tmp = -1480146895, tmp));
+  assertEquals(NaN, x /= x);
+  assertEquals(NaN, x %= (-2995257724.158043));
+  assertEquals(NaN, x %= (tmp = 2714835455, tmp));
+  assertEquals(NaN, x /= (tmp = -311440765.98078775, tmp));
+  assertEquals(NaN, x -= (-1600234513.697098));
+  assertEquals(0, x <<= x);
+  assertEquals(0, x <<= (-1499045929));
+  assertEquals(-0, x *= (-2491783113));
+  assertEquals(0, x ^= (x%((x>>(((1234398704.3681123)>>>x)%(x+x)))>>(402257223.4673699))));
+  assertEquals(-643225204, x ^= (((-55960194.698637486)+((((721411198)-(((tmp = 1308676208.7953796, tmp)%(2242904895))-x))>>((((tmp = 332791012, tmp)&((tmp = -2094787948, tmp)/((x/(2427791092))^(2444944499.6414557))))%(((x+(1253986263.5049214))+(((((3135584075.248715)+((tmp = -2569819028.5414333, tmp)%(440908176.1619092)))>>>(x<<((3061615025)-x)))%x)%(x+((2369612016)*((((tmp = 1173615806, tmp)*(-1910894327))&(2428053015.077821))*(-55668334.70082307))))))<<(tmp = -2129259989.0307562, tmp)))+(1579400360)))%((-3053590451.8996153)>>x)))+(x>>(x%(x^((-1772493876)^x))))));
+  assertEquals(413738663060841600, x *= x);
+  assertEquals(1581062538.4501781, x %= ((tmp = -1298397672.0300272, tmp)-((2237197923)+(tmp = -1385478459, tmp))));
+  assertEquals(755644566.8709538, x %= (tmp = -825417971.5792243, tmp));
+  assertEquals(1, x /= x);
+  assertEquals(0, x >>>= ((89330582)%(-1012731642.4855506)));
+  assertEquals(0, x >>>= x);
+  assertEquals(NaN, x %= ((x>>>((x/(tmp = -1848848941.2352903, tmp))>>>(tmp = -71862893, tmp)))&(-2385996598.2015553)));
+  assertEquals(NaN, x += (-2292484503.318904));
+  assertEquals(NaN, x *= (2961064461));
+  assertEquals(NaN, x += (x<<((2076798243.6442)/((tmp = -81541044.75366282, tmp)^((3041366498.551101)+((2126874365)/(tmp = -177610359, tmp)))))));
+  assertEquals(NaN, x %= ((x/((x/x)+x))>>>x));
+  assertEquals(NaN, x /= x);
+  assertEquals(NaN, x += (1171761980.678));
+  assertEquals(NaN, x += ((2355675823)<<(-390497521)));
+  assertEquals(NaN, x %= x);
+  assertEquals(0, x &= (tmp = -658428225.56619, tmp));
+  assertEquals(0, x ^= x);
+  assertEquals(0, x <<= (1643310725.5713737));
+  assertEquals(0, x <<= x);
+  assertEquals(0, x <<= (-397005335.3712895));
+  assertEquals(0, x >>>= (tmp = -2804713458.166788, tmp));
+  assertEquals(0, x <<= (((((((tmp = 1879988501, tmp)%(1528081313.9360204))+(1376936736))*((((x>>>((1736268617.339198)>>>(-2598735297.4277673)))<<((((((((-2742982036)/(231867353.4549594))-(875335564))<<x)|((2241386341.742653)<<((-22024910.828409433)&(x<<x))))*(-756987803.5693252))+x)^(tmp = 1084498737, tmp)))<<(1920373881.8464394))&(2370827451.82652)))&(x^(tmp = -891503574, tmp)))<<x)>>>((-1519588625.2332087)^(483024636.2600144))));
+  assertEquals(52193878.40997505, x -= ((tmp = -341753803.40997505, tmp)%(tmp = -96519975, tmp)));
+  assertEquals(-1665844168.938803, x -= (1718038047.348778));
+  assertEquals(3.6962232549405003e-19, x /= (((((-809583468.5507183)>>>((tmp = 286797763, tmp)%((1579183142.7321532)/(1853824036.001172))))<<x)>>(((x|x)^((tmp = -2641304815, tmp)<<(x<<x)))>>(((((268338128.8300134)&(-1778318362.8509881))*(751081373.346478))<<(((525066612)>>(-1139761212))*(2949167563.299916)))<<x)))+((tmp = 664905121, tmp)*((-2208280205)*(3069462420)))));
+  assertEquals(4710721795.110161, x += (((217604832)+((1307891481.781326)-x))+(tmp = 3185225481.328835, tmp)));
+  assertEquals(0, x %= x);
+  assertEquals(0, x -= (((x>>>(x/(tmp = 46977522.46204984, tmp)))>>(-2466993199.615269))&(tmp = 14524430.287991166, tmp)));
+  assertEquals(0, x >>= x);
+  assertEquals(0, x /= (tmp = 578120637, tmp));
+  assertEquals(-17267104, x -= (((tmp = 1515285919.495792, tmp)+(((tmp = -1364790286.7057304, tmp)+((954599071)>>((897770243.1509961)*x)))^x))>>>(566027942.1732262)));
+  assertEquals(-17267104, x &= x);
+  assertEquals(189138241, x ^= ((tmp = 1565742675.9503145, tmp)-((tmp = 1737806643, tmp)|((x*(tmp = -1382435297.5955122, tmp))*(-2820516692.153056)))));
+  assertEquals(189138241, x %= (x*(tmp = -1670678493, tmp)));
+  assertEquals(1693, x %= ((-2328713314)>>>(1623637325)));
+  assertEquals(1693, x %= ((-1019394014)*(x|x)));
+  assertEquals(3386, x += x);
+  assertEquals(9268970871604, x *= (2737439714));
+  assertEquals(-4720.120483643183, x /= (tmp = -1963714889, tmp));
+  assertEquals(-1, x >>= ((x^(((-2404688047.455056)|((1439590234.6203847)<<(tmp = -2496557617, tmp)))/((x<<((tmp = 1865549512.282249, tmp)/(((360384191.55661833)>>(tmp = -1225297117.344188, tmp))>>>(2703264010.4122753))))*(1521960888.0071676))))%(tmp = 2834001448.0508294, tmp)));
+  assertEquals(63, x >>>= (x&(-3079339174.6490154)));
+  assertEquals(0, x >>>= (1039770956.6196513));
+  assertEquals(0, x >>>= (-1074820214));
+  assertEquals(0, x >>>= (x/x));
+  assertEquals(0, x >>= ((tmp = -449117604.2811785, tmp)&x));
+  assertEquals(-0, x /= (tmp = -118266935.1241343, tmp));
+  assertEquals(2226140134, x += (tmp = 2226140134, tmp));
+  assertEquals(2068827161, x ^= ((tmp = -1950744808.846384, tmp)>>((2258661151)^((tmp = -1118176421.8650177, tmp)<<(2828634014)))));
+  assertEquals(123, x >>>= (-1779624840.0515127));
+  assertEquals(0, x >>>= (x|((tmp = -239082904, tmp)<<(tmp = 1404827607, tmp))));
+  assertEquals(0, x >>>= x);
+  assertEquals(1793109749, x ^= (tmp = -2501857547.710491, tmp));
+  assertEquals(855, x >>>= x);
+  assertEquals(0, x >>>= (-847289833));
+  assertEquals(0, x %= (-2271241045));
+  assertEquals(169648072, x ^= (((tmp = 169648072.66759944, tmp)^x)|x));
+  assertEquals(176025927479164930, x *= ((tmp = 1111997198.8803885, tmp)<<(tmp = 2913623691, tmp)));
+  assertEquals(176025926613281700, x += ((tmp = -865883245, tmp)<<(x+(-2624661650))));
+  assertEquals(3406506912, x >>>= ((x|(tmp = 2436016535, tmp))*(((tmp = -1222337225, tmp)<<((1765930268)&x))*(tmp = 1600702938, tmp))));
+  assertEquals(1.694694170868292, x %= (x/(-1597121830.794548)));
+  assertEquals(0, x >>= (tmp = -2443203089, tmp));
+  assertEquals(0, x >>>= (1323174858.2229874));
+  assertEquals(0, x &= ((tmp = 846556929.2764134, tmp)|(((1483000635.0020065)|(-3151225553))|(tmp = -229028309, tmp))));
+  assertEquals(0, x >>= x);
+  assertEquals(0, x >>= ((((((-2677334787)>>>x)>>((tmp = 496077992, tmp)&((((x<<(x*(tmp = 1095163344.2352686, tmp)))+(-952017952))%((x<<((x*x)/(tmp = 2983152477, tmp)))^((tmp = -939521852.1514642, tmp)^(tmp = 143967625.83755958, tmp))))*((tmp = 551827709.8366535, tmp)>>>x))))^((-1552681253.69869)-(-1874069995)))>>>(x>>(x%(tmp = -2554673215, tmp))))|(tmp = -190693051.77664518, tmp)));
+  assertEquals(0, x /= (tmp = 427402761.37668264, tmp));
+  assertEquals(0, x <<= x);
+  assertEquals(0, x |= (x>>>(((((-543326164.0673618)>>>(-2344090136.707964))>>>((((-563350246.6026886)/x)/(1525481037.3332934))&(tmp = -2917983401.88958, tmp)))^(-1094667845.1208413))^x)));
+  assertEquals(0, x &= (1080322749.897747));
+  assertEquals(0, x %= (tmp = -1572157280, tmp));
+  assertEquals(0, x >>>= x);
+  assertEquals(0, x %= ((377280936)|x));
+  assertEquals(708335912, x -= (tmp = -708335912, tmp));
+  assertEquals(2766937, x >>>= x);
+  assertEquals(547342779, x += (tmp = 544575842, tmp));
+  assertEquals(546273751, x -= ((x>>>(472833385.9560914))|((tmp = -1164832103.9970903, tmp)/(3147856452.1699758))));
+  assertEquals(546273751, x &= x);
+  assertEquals(0, x ^= x);
+  assertEquals(0, x >>>= (tmp = -3181805175, tmp));
+  assertEquals(-375546685, x |= (-375546685.08261824));
+  assertEquals(1089992785780217200, x *= (tmp = -2902416209, tmp));
+  assertEquals(0, x %= x);
+  assertEquals(-1854981526, x -= ((x-x)-(-1854981526)));
+  assertEquals(-3709963052, x += x);
+  assertEquals(-316772482, x %= (tmp = -1696595285, tmp));
+  assertEquals(-316772482, x |= x);
+  assertEquals(1, x /= x);
+  assertEquals(0, x -= x);
+  assertEquals(-1418375842, x ^= (-1418375842));
+  assertEquals(-2, x >>= x);
+  assertEquals(-4, x += x);
+  assertEquals(-8388608, x &= (x<<(-350555339.30086184)));
+  assertEquals(-16777216, x += x);
+  assertEquals(-0, x %= x);
+  assertEquals(1083355129, x += (tmp = 1083355129, tmp));
+  assertEquals(0, x &= (((tmp = 389729053, tmp)-(tmp = 2944192190.0939536, tmp))/(x-(2081712461.2657034))));
+  assertEquals(0, x += x);
+  assertEquals(-3, x += ((3147270119.5831738)>>((2455837253.1801558)%((-2100649096)>>(((290236808.01408327)|(x&((2661741230.3235292)|((tmp = 1686874589.4690177, tmp)<<x))))*(x+(tmp = 2327674670, tmp)))))));
+  assertEquals(-3, x %= ((x>>(((-2962686431)%x)>>((((2438370783)-(tmp = 2667305770.4839745, tmp))>>>x)>>>x)))<<((x&(tmp = 1428498616, tmp))|((tmp = 2621728539.102742, tmp)/(-204559901)))));
+  assertEquals(2, x ^= (x|((((tmp = 1751230118.6865973, tmp)/(-867465831.207304))>>((-808143600.0912395)+(-2882191493.0506454)))^x)));
+  assertEquals(2, x %= (-2015954220.2250996));
+  assertEquals(0, x >>>= (tmp = 401373999, tmp));
+  assertEquals(0, x >>= (2371830723));
+  assertEquals(0, x >>>= ((((tmp = 2765919396, tmp)-x)-(530310269.7131671))|(tmp = -615761207.9006102, tmp)));
+  assertEquals(-145389011, x ^= (tmp = -145389011, tmp));
+  assertEquals(-145389011, x |= x);
+  assertEquals(1632929832, x &= (-2518898392));
+  assertEquals(4190540017.751949, x += (tmp = 2557610185.751949, tmp));
+  assertEquals(4980024282.153588, x += ((1841304364.1177452)%(tmp = 1051820099.7161053, tmp)));
+  assertEquals(0, x >>>= (((((1379314342.4233718)>>((-2782805860)^((x%(tmp = 1328845288, tmp))>>>(tmp = 901403219.858733, tmp))))+(x/((tmp = -3078904299, tmp)/x)))/x)|(x|(1399702815))));
+  assertEquals(-1820494882, x ^= (tmp = -1820494882.407127, tmp));
+  assertEquals(-305870376, x %= (tmp = -757312253, tmp));
+  assertEquals(-577530443, x += (x|(tmp = -1958083619.6653333, tmp)));
+  assertEquals(333541412591776260, x *= x);
+  assertEquals(-949341696, x >>= ((((1550069663)<<((x>>>(tmp = 2406565178.902887, tmp))>>>((1844746612.632984)/((tmp = 2233757197, tmp)*((-1524891464.1028347)>>(tmp = 2498623474.5616803, tmp))))))&x)<<(x&(tmp = -370379833.3884752, tmp))));
+  assertEquals(-277202090, x |= ((-762200848.8405354)-(tmp = 1749136282, tmp)));
+  assertEquals(0.13704539927239265, x /= (tmp = -2022702633.373563, tmp));
+  assertEquals(0, x -= x);
+  assertEquals(0, x %= ((132951580.19304836)-((427623236.27544415)-(1212242858))));
+  assertEquals(0, x &= ((449148576)&(-1609588210.249217)));
+  assertEquals(0, x >>= x);
+  assertEquals(0, x -= x);
+  assertEquals(-0, x /= (tmp = -1640777090.9694843, tmp));
+  assertEquals(0, x &= (((tmp = -1923412153, tmp)>>>((x>>(tmp = 3027958119.0651507, tmp))+(60243350)))>>(tmp = -2610106062, tmp)));
+  assertEquals(0, x ^= (((-186998676)/(tmp = 2697937056, tmp))-x));
+  assertEquals(-1147950080, x |= ((2425449461)*(tmp = -2525854833, tmp)));
+  assertEquals(457688198, x ^= (2698274950.660941));
+  assertEquals(8724, x %= ((1174351031)>>>((371599047.36048746)+(3025292010))));
+  assertEquals(0, x <<= (tmp = -710011617, tmp));
+  assertEquals(0, x >>>= (1693410026));
+  assertEquals(1443005362, x ^= ((tmp = -2851961934, tmp)+((((x%x)-(tmp = 547622400, tmp))<<(((tmp = 722396486.5553623, tmp)|x)>>>((((tmp = -542268973.5080287, tmp)<<(tmp = 1347854903.771954, tmp))>>>(tmp = -889664427.7115686, tmp))&((tmp = 1549560114, tmp)*(tmp = 964918035, tmp)))))&(-2422502602.920377))));
+  assertEquals(3986573462, x -= (-2543568100));
+  assertEquals(7973146924, x += x);
+  assertEquals(-1, x >>= (-75987297));
+  assertEquals(-12, x += ((2940824338.64834)>>(tmp = 3061467355, tmp)));
+  assertEquals(-3.8229398525977614e-8, x /= (313894554));
+  assertEquals(-2.890709270374084e-17, x /= (tmp = 1322491989, tmp));
+  assertEquals(0, x |= (x-x));
+  assertEquals(0, x >>>= (tmp = -1205300664, tmp));
+  assertEquals(-0, x /= (((2869505187.6914144)>>(tmp = 1541407065, tmp))/(((-571132581)>>>(x>>x))/((x^(170373762.8793683))>>>((((tmp = -363073421.05897164, tmp)|(((tmp = -1591421637, tmp)>>(1095719702.8838692))&(636687681.9145031)))^x)^(x|x))))));
+  assertEquals(-1487828433, x ^= (-1487828433.3462324));
+  assertEquals(-0, x %= x);
+  assertEquals(1716342498, x -= ((tmp = 2578624798, tmp)^x));
+  assertEquals(1636, x >>= ((264194540)>>>(-801900756)));
+  assertEquals(0, x >>>= ((tmp = 2502688876, tmp)+((x<<(x|((-628272226.0338528)|((x<<(-2083074091))>>>(tmp = 1692123246.8418589, tmp)))))>>(1594759826.990993))));
+  assertEquals(0, x <<= (tmp = -904399643, tmp));
+  assertEquals(NaN, x /= ((x^(x-x))%((tmp = 1744962024.4882128, tmp)%x)));
+  assertEquals(NaN, x /= (-1013142883.1845908));
+  assertEquals(NaN, x /= ((tmp = 793633198, tmp)^(-2993598490.8659954)));
+  assertEquals(0, x &= (x>>((tmp = 1200937851, tmp)<<(((tmp = -2807378465, tmp)&(tmp = -143778237, tmp))|(tmp = -1200772223, tmp)))));
+  assertEquals(0, x <<= x);
+  assertEquals(88144, x |= (((((tmp = 3002723937.8560686, tmp)*(tmp = -3171720774.2612267, tmp))%(((tmp = -2586705978.7271833, tmp)%((x+(-1553704278))&(2405085526.501994)))>>((-240842053)>>>(((((tmp = -1886367228.4794896, tmp)>>>x)^(tmp = 2604098316, tmp))^(tmp = 1362808529, tmp))<<((tmp = -1062263918, tmp)|((-172718753)%(tmp = -1910172365.4882073, tmp)))))))^((1444153362)>>((x&((-1205465523.2604182)^(tmp = -2062463383, tmp)))>>(tmp = 956712476, tmp))))>>((((-1004215312)^((((-1707378612.5424936)^(tmp = 2372161553, tmp))/((tmp = 1802586581, tmp)*((2082257.1896460056)&((tmp = -1270773477, tmp)^(tmp = 942517360.3447798, tmp)))))+x))%((((666494127)^(x^x))>>>(tmp = -2592829775, tmp))+((-1601528223)+((x+(tmp = -2417034771.7409983, tmp))>>>((tmp = -730673817, tmp)*x)))))>>x)));
+  assertEquals(-2603179111.7557006, x -= ((2603267255.755627)+(x/(1200979191.2823262))));
+  assertEquals(1691788185, x >>= (tmp = 3088840032, tmp));
+  assertEquals(-168382533, x |= (tmp = -780750941.4590135, tmp));
+  assertEquals(-168382533, x >>= (60741120.48285198));
+  assertEquals(-134287365, x |= (x*(tmp = 834637940.7151251, tmp)));
+  assertEquals(-1481917089, x -= (tmp = 1347629724, tmp));
+  assertEquals(1, x >>>= x);
+  assertEquals(262144, x <<= (2680216914));
+  assertEquals(1075132032, x ^= (x-((tmp = 3220359552.3398685, tmp)^(((-434474746.6039338)|((((((((tmp = 1945689314.9683735, tmp)>>(1300022273))>>>(333705550))&x)%(588357521))-(x+(x^(((tmp = -134560382, tmp)+x)-((((994246147.7195556)-(-1506599689.7383268))%(x<<x))>>((1256426985.5269494)+(tmp = 1860295952.8232574, tmp)))))))^(((tmp = 917333220.2226384, tmp)>>x)>>>(tmp = 865898066, tmp)))%((x|(x%((tmp = -2660580370, tmp)&(tmp = 2966426022, tmp))))*x)))/(((tmp = 682585452, tmp)&(-3219368609))+((tmp = -1330253964, tmp)+((x&(2857161427))/x)))))));
+  assertEquals(274944, x &= ((2606953028.1319966)-(-1707165702)));
+  assertEquals(266752, x &= ((x<<((x+(x+(x^(-1570175484))))^x))^(x+(x<<(tmp = 90330700.84649956, tmp)))));
+  assertEquals(266752, x &= ((((x*(tmp = 2033225408, tmp))-(x-((tmp = 1507658653, tmp)/(-3016036094))))>>>((1497480588)>>(2784070758)))|(tmp = -3025904401.93921, tmp)));
+  assertEquals(-1680442631, x |= ((x/(445284843))|((tmp = 2614520057.2723284, tmp)<<x)));
+  assertEquals(40851947, x >>>= (tmp = -1577031386.938616, tmp));
+  assertEquals(2493, x >>= ((3044630989.3662357)-(-2670572992.8580284)));
+  assertEquals(-0.0000017317105653562252, x /= (-1439617017.9207587));
+  assertEquals(0, x &= (2359806567));
+  assertEquals(623768541, x ^= (623768541));
+  assertEquals(1028567149.0716183, x += (((tmp = 1307794561, tmp)%(x>>x))-(-404798608.0716183)));
+  assertEquals(-1.2971762489811298, x /= (tmp = -792927830.6471529, tmp));
+  assertEquals(-1.2971762489811298, x %= ((-2426421701.2490773)/(-689566815.3393874)));
+  assertEquals(-2147483648, x <<= x);
+  assertEquals(-2147483648, x &= (tmp = -869991477, tmp));
+  assertEquals(-268435456, x >>= (1383186659));
+  assertEquals(0, x -= x);
+  assertEquals(-2009742037, x |= (-2009742037.5389993));
+  assertEquals(-1386630820, x ^= (627864695));
+  assertEquals(-1033479103975173600, x *= (tmp = 745316697.9046186, tmp));
+  assertEquals(-1628048487, x |= (2662654361));
+  assertEquals(325551, x >>>= (340874477));
+  assertEquals(-1235730537, x ^= (tmp = 3059533880.0725217, tmp));
+  assertEquals(-1235730537, x %= (2247137328));
+  assertEquals(-220200960, x <<= ((x>>x)-x));
+  assertEquals(0, x <<= ((tmp = 337220439.90653336, tmp)|(tmp = 2901619168.375105, tmp)));
+  assertEquals(0, x >>>= ((-2114406183)/x));
+  assertEquals(0, x %= ((1425828626.3896675)/x));
+  assertEquals(0, x >>>= ((3213757494)>>>(2595550834.3436537)));
+  assertEquals(0, x <<= x);
+  assertEquals(-0, x /= ((1544519069.5634403)/((tmp = -1332146306, tmp)&(-762835430.0022461))));
+  assertEquals(0, x ^= x);
+  assertEquals(0, x >>= (x|((((x*((-786272700)+x))<<x)+((tmp = -1868484904, tmp)-(tmp = -1692200376, tmp)))+(-1010450257.6674457))));
+  assertEquals(0, x -= x);
+  assertEquals(0, x ^= (x>>>(706010741)));
+  assertEquals(-964928697, x |= (-964928697));
+  assertEquals(1, x /= x);
+  assertEquals(0, x >>= ((((tmp = 1778003555.3780043, tmp)>>(x%((tmp = -766158535, tmp)^((-2681449292.8257303)%((x-(x|(tmp = 1966478387.2443752, tmp)))^(((tmp = -1848398085, tmp)&x)>>>(tmp = -2860470842, tmp)))))))%(tmp = 2315077030, tmp))^x));
+  assertEquals(0, x ^= x);
+  assertEquals(-288007757, x ^= ((tmp = 183607156.1803962, tmp)-(tmp = 471614914, tmp)));
+  assertEquals(-270573581, x |= (tmp = -849475741.9424644, tmp));
+  assertEquals(-2129929, x |= (((((1942852445)&(tmp = 1280372312, tmp))*(x*(tmp = -1601900291, tmp)))^((509080002.81080174)-(tmp = 2699498226.9164257, tmp)))>>(((-335361221)>>(tmp = 843134832, tmp))%(-35532542))));
+  assertEquals(-232622355, x ^= ((-3060885134.5375547)-(((tmp = 1965966723, tmp)-((tmp = 1248630129.6970558, tmp)<<(tmp = 1859637857.5027392, tmp)))*x)));
+  assertEquals(-52149658093200070, x *= (224181627.31264615));
+  assertEquals(-697122968, x ^= (x-(x+(tmp = 2747211186.407712, tmp))));
+  assertEquals(-2146269688, x &= ((tmp = -1466710519, tmp)^(x/(1419998975))));
+  assertEquals(-536567422, x >>= (((((tmp = -1760701688.999274, tmp)>>(-1821976334))/(((tmp = -1660849531, tmp)>>>x)-((x+((tmp = -2489545009.4327965, tmp)>>>((tmp = -267360771.39148235, tmp)^x)))*(((-1453528661)%x)>>>(((243967010.3118453)/((((((2977476024)>>>((-1630798246)<<x))&(591563895.2506002))*(((2668543723.9720144)>>>x)|(1600638279)))^x)>>(x<<(tmp = -152589389, tmp))))>>>(x|(2821305924.9225664)))))))+(618968002.8307843))%(tmp = -1005408074.368274, tmp)));
+  assertEquals(40962, x &= (114403906));
+  assertEquals(19741977727890, x *= ((-2367133915.963945)>>>(-3119344126)));
+  assertEquals(1313341440, x <<= x);
+  assertEquals(626, x >>>= ((((-333992843)%(tmp = -2742280618.6046286, tmp))>>>x)|x));
+  assertEquals(0, x <<= (2598188575));
+  assertEquals(NaN, x %= x);
+  assertEquals(NaN, x %= x);
+  assertEquals(0, x ^= (x%((2507288229.3233204)&(tmp = -1714553169.9276752, tmp))));
+  assertEquals(0, x /= ((633436914.3859445)>>>(tmp = 1579804050.6442273, tmp)));
+  assertEquals(0, x *= ((tmp = 1172218326, tmp)<<((tmp = -2491306095.8456626, tmp)*(((tmp = 1305371897.9753594, tmp)>>((x^(((3077992060)*x)<<(492815553.904796)))>>((652151523)|x)))%x))));
+  assertEquals(0, x <<= x);
+  assertEquals(0, x %= (1118131711));
+  assertEquals(0, x &= ((tmp = 2734673884, tmp)|(x-((tmp = 2694578672.8975897, tmp)*(((x>>(2350811280.974167))*(1052548515))&(x^(x*(tmp = -1336287059.0982835, tmp))))))));
+  assertEquals(-2632782867.1256156, x += ((tmp = -2743992725.1256156, tmp)+(tmp = 111209858, tmp)));
+  assertEquals(-0, x %= x);
+  assertEquals(0, x >>>= (((tmp = -2050519887, tmp)^(106865302.74529803))>>(1642851915.2909596)));
+  assertEquals(-171964826, x |= (tmp = -171964826.6087358, tmp));
+  assertEquals(-2.113405951193522, x /= (tmp = 81368572.80206144, tmp));
+  assertEquals(3, x >>>= x);
+  assertEquals(0, x %= x);
+  assertEquals(-1717345907.837667, x += (-1717345907.837667));
+  assertEquals(-100964883, x |= (tmp = -109574931.80629134, tmp));
+  assertEquals(-33849857, x |= (-974111718.2433801));
+  assertEquals(1, x >>>= (tmp = -2556222849.005595, tmp));
+  assertEquals(1, x /= x);
+  assertEquals(0, x >>>= (-1796630999.4739401));
+  assertEquals(0, x >>>= x);
+  assertEquals(2031695758, x += (((x/(((tmp = -2364918403, tmp)%(x^((tmp = 277767803.6375599, tmp)>>((((tmp = 540036080, tmp)/(x|(2665298931)))/(x|((x>>(-2035456216.6165116))<<(2143184420.5651584))))^x))))&(tmp = 927798419.8784283, tmp)))-(-2031695758))>>>x));
+  assertEquals(2031695758, x |= x);
+  assertEquals(2031695758, x <<= (((x>>(x%x))|(tmp = -1164531232.7384055, tmp))*x));
+  assertEquals(124004, x >>>= x);
+  assertEquals(529846352, x += ((529722348)%((2417645298.865121)|(x>>(x>>>(x+x))))));
+  assertEquals(60067920, x &= (((tmp = -3166008541.8486233, tmp)-x)|(x%x)));
+  assertEquals(1415594240755200, x *= ((-2786707452.873729)>>(((tmp = -2369315809, tmp)*((1559868465)|(1011218835.1735028)))>>>x)));
+  assertEquals(1415595182259140, x += (941503939.9023957));
+  assertEquals(0, x <<= ((tmp = 2887184784.265529, tmp)/(-2575891671.0881453)));
+  assertEquals(0, x &= ((tmp = -1546339583, tmp)>>>(tmp = -587433830, tmp)));
+  assertEquals(0, x *= (((tmp = 1356991166.5990682, tmp)%(tmp = -284401292, tmp))*(1869973719.9757812)));
+  assertEquals(NaN, x %= x);
+  assertEquals(0, x ^= (((tmp = 92575404.43720293, tmp)>>>(263475358.17717505))%x));
+  assertEquals(0, x <<= (((561514358)*(tmp = -439584969, tmp))%((((-3005411368.7172136)+x)|(-2230472917))&x)));
+  assertEquals(0, x >>= ((x>>>x)-((x-(1630649280.510933))+x)));
+  assertEquals(0, x >>= (tmp = -1772403084.7012017, tmp));
+  assertEquals(0, x *= x);
+  assertEquals(0, x += x);
+  assertEquals(0, x &= x);
+  assertEquals(0, x >>= (tmp = 1622680387, tmp));
+  assertEquals(1033887633558225200, x -= ((-510616337)*(tmp = 2024783695, tmp)));
+  assertEquals(-2.8073538539158063e+27, x *= (tmp = -2715337492, tmp));
+  assertEquals(-2.8073538539158063e+27, x -= ((tmp = -1664804757, tmp)&((tmp = -226616419, tmp)>>>(1006711498))));
+  assertEquals(1894539615, x |= (tmp = -2400427681.1831083, tmp));
+  assertEquals(7400545, x >>= (774629608.4463601));
+  assertEquals(456756268, x += (449355723));
+  assertEquals(285771784, x &= (-1316427366));
+  assertEquals(17, x >>= ((tmp = -220509931.20787525, tmp)*(((tmp = 2518859292, tmp)+(-1477543005.1586645))>>(tmp = 3172820250.687789, tmp))));
+  assertEquals(85924262443, x *= (x*((tmp = -2856669745.965829, tmp)&(((tmp = 401420695, tmp)^(tmp = 2355371132, tmp))|(tmp = 590645330.021911, tmp)))));
+  assertEquals(1703875715, x ^= ((-2576394029.7843904)-x));
+  assertEquals(1703875715, x %= (tmp = 2234144310, tmp));
+  assertEquals(271405807, x ^= (1973569132));
+  assertEquals(1060178, x >>>= (tmp = -84823096, tmp));
+  assertEquals(8, x >>>= (tmp = 2246120561.905554, tmp));
+  assertEquals(-2846791089, x += (-2846791097));
+  assertEquals(104933962, x &= (x-(-2969030955.99584)));
+  assertEquals(489215611.96215343, x -= (-384281649.96215343));
+  assertEquals(489215611, x |= x);
+  assertEquals(1186191360, x <<= ((tmp = 774407142.993727, tmp)%x));
+  assertEquals(1186191360, x %= (1555004022));
+  assertEquals(-1697134080, x ^= (tmp = -597421568, tmp));
+  assertEquals(-1102053376, x <<= ((-927370769.4059179)^((tmp = 1093490918, tmp)>>(((-2522227493.3821955)%x)+(-2657319903)))));
+  assertEquals(1086450058, x ^= (-23991926.187098265));
+  assertEquals(1086450058, x |= x);
+  assertEquals(-1.6554590588410778, x /= (x|(x<<(x+x))));
+  assertEquals(67108863, x >>>= ((-926530233)+x));
+  assertEquals(494553310, x ^= (tmp = 512079649, tmp));
+  assertEquals(207751168, x &= (2892146720.6261826));
+  assertEquals(207751168, x &= x);
+  assertEquals(207751168, x |= x);
+  assertEquals(6340, x >>>= (((((x<<(x-((-2819638321)*((x<<x)+x))))>>x)+(tmp = 2016170261, tmp))+(tmp = 2755496043.772017, tmp))+(-841368625.1402085)));
+  assertEquals(6340, x ^= ((x/(tmp = -192734784, tmp))>>>(((-140306239)&x)-x)));
+  assertEquals(1, x /= x);
+  assertEquals(0, x >>= x);
+  assertEquals(26786600, x ^= (tmp = 26786600, tmp));
+  assertEquals(-0.014657576899542954, x /= ((-1454855938.0338)+(-372635753.3681567)));
+  assertEquals(0, x &= ((tmp = 2480635933, tmp)&(-2986584704.9165974)));
+  assertEquals(-2108639122, x += ((tmp = 2108639123.8683565, tmp)^((-881296055)/(((x<<(2026200582))|(tmp = -862495245.138771, tmp))-(-1111596494.892467)))));
+  assertEquals(1893466112, x <<= (tmp = 607974481, tmp));
+  assertEquals(1893466112, x |= x);
+  assertEquals(1133122783.997418, x += ((tmp = -760343332, tmp)-((x-(tmp = -878561823.4218843, tmp))/(tmp = -693454632.596637, tmp))));
+  assertEquals(8, x >>>= (tmp = 700339003.3919828, tmp));
+  assertEquals(4.605305035175536e-9, x /= (1737127060.8343256));
+  assertEquals(4.605305035175536e-9, x -= ((x%(897221779))>>>x));
+  assertEquals(-1864423625.5704088, x += (tmp = -1864423625.5704088, tmp));
+  assertEquals(1132240092, x <<= (1304417186.1193643));
+  assertEquals(-2088985380, x ^= (x<<x));
+  assertEquals(-4, x >>= ((tmp = 1959823884.0935726, tmp)%(-1679792398.569136)));
+  assertEquals(-268435456, x <<= ((tmp = 2586838136, tmp)|((tmp = -481716750.718518, tmp)>>>((1485826674.882607)/(tmp = -2826294011, tmp)))));
+  assertEquals(-32768, x >>= (2060648973));
+  assertEquals(1, x /= x);
+  assertEquals(-2838976297, x -= (tmp = 2838976298, tmp));
+  assertEquals(-1382985298, x <<= ((tmp = -2104305023, tmp)&x));
+  assertEquals(10, x >>>= (x+x));
+  assertEquals(10, x -= (x>>>(361588901.70779836)));
+  assertEquals(854603510, x -= (-854603500));
+  assertEquals(-557842432, x <<= (tmp = 1212985813.6094751, tmp));
+  assertEquals(-459390188241943040, x *= (tmp = 823512450.6304014, tmp));
+  assertEquals(-232800033621957060, x /= ((((((686635689)/(tmp = 2013252543, tmp))*(tmp = -1591617746.8678951, tmp))|(((tmp = -1777454093.5611362, tmp)>>>((tmp = 2680809394, tmp)^(((x>>((((((tmp = -265022244, tmp)%((tmp = -3075004537, tmp)>>(((((1427784269.5686688)^((tmp = -1095171528.911587, tmp)^(-942424985.7979553)))>>(-1279441481.1987405))*((2493620394)>>(-2769016043)))/(x&((tmp = 2059033657, tmp)%(((tmp = 1948606940.1488457, tmp)-(tmp = -2645984114.13219, tmp))^x))))))^x)^x)%(x%((((tmp = 3209433446.4551353, tmp)%(tmp = 1364430104.0424738, tmp))/(tmp = -2103044578.349498, tmp))+(tmp = -2613222750, tmp))))*(2099218034)))&(((tmp = -378500985.49700975, tmp)>>(((x+x)|(x%(((-1841907486)<<(-1220613546.194021))<<(tmp = -1260884176, tmp))))^(tmp = 1858784116, tmp)))>>>((x%x)%((x>>>(tmp = -2540799113.7667685, tmp))|x))))/((((tmp = 642072894.6455215, tmp)-(-324951103.6679399))*(tmp = 1424524615, tmp))+((x<<(tmp = -904578863.5945344, tmp))*(tmp = 49233475.435349464, tmp))))))<<(tmp = 1680210257, tmp)))+((tmp = -1516431503, tmp)>>>(-1105406695.3068116)))/(-275019361.6764543)));
+  assertEquals(192359387.42913792, x /= (-1210234846));
+  assertEquals(192359387.42913792, x %= (-2920206625.0154076));
+  assertEquals(192359387.42913803, x -= (((((((tmp = -1263203016.3258834, tmp)-(2432034005.6011124))&x)<<(1479434294))>>((tmp = -1695856315.523002, tmp)>>>(tmp = 557391345, tmp)))/(tmp = -1280240246.2501266, tmp))%((tmp = -2196489823.034029, tmp)>>(((x&((912221637.1101809)+((tmp = -3003677979.652423, tmp)>>(tmp = -716129460.1668484, tmp))))-((x+(x-(-2780610859)))>>>(-2445608016)))<<((x*(x+(x+(((-2124412727.9007604)%(tmp = -593539041.5539455, tmp))&(tmp = 2404054468.768749, tmp)))))%(x>>(tmp = -2913066344.404591, tmp)))))));
+  assertEquals(11740, x >>= (688848398.7228824));
+  assertEquals(11740, x >>= ((1545765912)*(307650529.9764147)));
+  assertEquals(23480, x += x);
+  assertEquals(0, x >>>= ((tmp = 1313078391, tmp)|x));
+  assertEquals(1726251264, x -= ((1939413887)<<(1004888744.2840619)));
+  assertEquals(765324793.5278986, x %= (960926470.4721014));
+  assertEquals(747387, x >>= ((2483010044)-(tmp = -413698190, tmp)));
+  assertEquals(1, x /= x);
+  assertEquals(3016811624, x *= (3016811624));
+  assertEquals(17408, x &= (((tmp = -991624868, tmp)<<(((63107932)/(tmp = 2659939199, tmp))|(tmp = -1968768911.3575773, tmp)))>>(((-2876822038.9910746)|(tmp = 2550230179.243425, tmp))<<((x*(x<<((x<<((tmp = -1627718523.616604, tmp)|((2154120561.254636)-(x%(x<<(1484563622.1791654))))))<<((((x^(tmp = 3016524169, tmp))<<(((x+(tmp = 1887816698.2455955, tmp))+x)-x))-(-3023329069))-x))))+x))));
+  assertEquals(0, x <<= (((1247441062.177967)/(-1717276234))+x));
+  assertEquals(0, x |= ((x%((-1648299429.4520087)>>(-137511052)))>>(tmp = 221301016.4926411, tmp)));
+  assertEquals(0, x /= ((-2598501544.913707)>>>(-2177037696)));
+  assertEquals(NaN, x %= (x>>x));
+  assertEquals(0, x &= (tmp = 1852419158, tmp));
+  assertEquals(-829029120, x |= (((2122339180)*((((((tmp = 768748914, tmp)<<((1008490427)&((1937367899.957056)-(((635094486)>>(((tmp = -795046025, tmp)*(2665104134.4455256))^(tmp = 706594584.2462804, tmp)))/(504397522)))))/(-556057788))>>((x/(tmp = -2732280594, tmp))-x))+(-1989667473))+(tmp = 2766802447.789895, tmp)))<<(((tmp = -2969169096, tmp)-x)+(tmp = 2093593159.0942125, tmp))));
+  assertEquals(0.6451933462602606, x /= ((-1284931292)<<(x<<(tmp = 1294716764, tmp))));
+  assertEquals(1515416866.520901, x *= (2348779440));
+  assertEquals(-1620606242886682600, x *= ((-993898625.5357854)&(((tmp = -571100481, tmp)/x)*((2428590177.311031)%(tmp = -2671379453, tmp)))));
+  assertEquals(-1137472828, x %= (tmp = -1195183004, tmp));
+  assertEquals(-3096634005473250000, x *= (tmp = 2722380640, tmp));
+  assertEquals(-3096634003996758500, x -= (-1476491033.833419));
+  assertEquals(-3096634000805538000, x += (3191220521.978341));
+  assertEquals(-3096634000805468000, x += ((((tmp = -3024976741, tmp)&(952616360))|((x*(-1547952311))+(x*x)))>>>(tmp = 981373323, tmp)));
+  assertEquals(-3096633998655594000, x += (2149873927));
+  assertEquals(-118812224101.54297, x %= (((2641881276.9898443)*(((502159480)^x)<<x))%((tmp = -2840045365.547772, tmp)*(((((-2297661528)>>>(x>>(-229103883.94961858)))&(((-1285047374.6746495)<<((-360045084)>>>((x-(tmp = -956123411.1260898, tmp))%x)))>>((tmp = -2375660287.5213504, tmp)+((((tmp = -2753478891, tmp)>>>(((tmp = 101438098, tmp)>>(((tmp = -2736502951, tmp)<<((tmp = -3084561882.368902, tmp)&(tmp = 1491700884, tmp)))|x))&(tmp = 1627412882.6404104, tmp)))>>>(tmp = 1039002116.6784904, tmp))<<((tmp = -2840130800, tmp)-(tmp = -740035567, tmp))))))&(tmp = -416316142, tmp))>>x))));
+  assertEquals(86, x >>>= (tmp = -293489896.5572462, tmp));
+  assertEquals(172, x += (x%((((-2635082487.364155)|((-2361650420.634912)&(-2147095650.7451198)))<<((tmp = 2258905145.9231243, tmp)%((((tmp = -1365987098.5130103, tmp)*(((((((932437391)/x)/(289270413.0780891))%(x-x))+((((2194986374.917528)>>(((((tmp = -1553805025, tmp)|x)^(((x>>(-564400586.0780811))^(tmp = 1738428582.0238137, tmp))>>(tmp = 1717774140, tmp)))&(tmp = -2789427438, tmp))%(((tmp = -1386118057, tmp)*(-2333221237.7915535))*(x>>>(((((41346648.46438944)&x)%(-478973697.6792319))|(tmp = 2108106738, tmp))/x)))))-(tmp = -133437701.64136505, tmp))>>>x))+(tmp = -1567210003, tmp))*(x+((x&x)-(2942851671)))))>>>(tmp = -446377136, tmp))*((((((tmp = 1597203255, tmp)>>>(619157171))|(-2766246629.005985))>>((tmp = 3130227370, tmp)%x))*(tmp = 2072227901.6101904, tmp))|((tmp = 1369019520, tmp)^(759659487))))))>>>x)));
+  assertEquals(1996475731, x ^= ((1456327892.2281098)|(1728022827)));
+  assertEquals(0, x %= x);
+  assertEquals(0, x &= (1323847974));
+  assertEquals(3076829073.8848357, x += (3076829073.8848357));
+  assertEquals(9569842648396755000, x *= (3110293883.2782717));
+  assertEquals(9569842646260304000, x -= (2136450372.9038036));
+  assertEquals(9.158188827418242e+37, x *= x);
+  assertEquals(0, x <<= ((x&(tmp = -2241179286, tmp))+((tmp = 2553144081, tmp)&((tmp = -1914709694, tmp)^(tmp = -1469651409.0651562, tmp)))));
+  assertEquals(0, x <<= x);
+  assertEquals(0, x /= (2177840666.276347));
+  assertEquals(0, x %= (-690827104));
+  assertEquals(0, x >>>= x);
+  assertEquals(0, x ^= x);
+  assertEquals(-0, x /= (tmp = -803415280, tmp));
+  assertEquals(-2355576914.316743, x += (-2355576914.316743));
+  assertEquals(-833671722514674000, x *= ((3053388806.692315)-(tmp = 2699474775.081724, tmp)));
+  assertEquals(1, x /= x);
+  assertEquals(1898147684, x += ((tmp = 1898147683, tmp)|(x<<x)));
+  assertEquals(2.192324660388075, x %= ((tmp = 2630187518, tmp)/((2868794982.790862)|(490860748))));
+  assertEquals(0, x >>>= ((2751021779)/(-952522559)));
+  assertEquals(321040461, x ^= ((321040461.153594)-x));
+  assertEquals(-2.3814602031636922, x /= ((tmp = -170472190, tmp)|x));
+  assertEquals(-1, x >>= (2200125174.177402));
+  assertEquals(-2964432647.9379396, x += (-2964432646.9379396));
+  assertEquals(-370116502.93793964, x %= (tmp = -518863229, tmp));
+  assertEquals(777927355.2283959, x -= (-1148043858.1663356));
+  assertEquals(0, x *= ((tmp = 1134913539, tmp)&(((x>>>((tmp = -989822787, tmp)>>>x))%x)&(tmp = 1078636160.7313156, tmp))));
+  assertEquals(-1089245637, x ^= (3205721659.3548856));
+  assertEquals(-1192493056, x <<= (-1173291054));
+  assertEquals(78013832, x += ((tmp = 2462999944, tmp)+x));
+  assertEquals(0, x %= x);
+  assertEquals(0, x >>>= (1794908927.7409873));
+  assertEquals(1708338504, x += ((-2586628792.3484306)<<x));
+  assertEquals(12, x >>= (-545794789.3827574));
+  assertEquals(0, x &= ((2753207225)<<(((-1776581207.557251)+((tmp = -2414140402, tmp)*x))+(x<<(x|(tmp = 772358560.3022032, tmp))))));
+  assertEquals(0, x <<= ((tmp = -2755724712.152605, tmp)/((x>>(-732875466))&x)));
+  assertEquals(NaN, x *= (((tmp = 2617815318.1134562, tmp)/x)%(x|((((((-851659337.194871)<<(tmp = 2072294700, tmp))%((x+(2193880878.5566335))^((tmp = 3005338026, tmp)-(2947963290))))/x)/(x+(2091745239.4210382)))-(x>>x)))));
+  assertEquals(NaN, x /= (tmp = -427684595.0278094, tmp));
+  assertEquals(NaN, x /= (tmp = -263945678, tmp));
+  assertEquals(0, x <<= x);
+  assertEquals(0, x <<= x);
+  assertEquals(0, x -= (((x>>((x&x)-(tmp = -673697315, tmp)))>>(((1575095242.2330558)/(x-(-1816886266)))%(-1580195729)))>>>x));
+  assertEquals(0, x >>>= x);
+  assertEquals(0, x >>= (-2815518206));
+  assertEquals(0, x -= (x/(1795634670.692437)));
+  assertEquals(-2753579891, x += (tmp = -2753579891, tmp));
+  assertEquals(2.7773776150171776, x /= (tmp = -991431585, tmp));
+  assertEquals(5.554755230034355, x += x);
+  assertEquals(3.362161997528237e-9, x /= (1652137890.4758453));
+  assertEquals(3.362161997528237e-9, x %= (tmp = -10848734.527020693, tmp));
+  assertEquals(1, x /= x);
+  assertEquals(-2978012493, x -= (x+(2978012493)));
+  assertEquals(-5.158905851797543, x /= (((x+((tmp = -2548840164, tmp)>>x))<<(x^((tmp = -533281232.7294345, tmp)&x)))&(tmp = -1502692171, tmp)));
+  assertEquals(-5.158905851797543, x %= (-3009435255.5612025));
+  assertEquals(-20971520, x <<= ((tmp = -2728812464, tmp)%(2619809573.672677)));
+  assertEquals(-1900019712, x &= (2398099552));
+  assertEquals(-1991377, x %= ((tmp = 1562364373.7334614, tmp)>>>(((x-(-946283217))<<(-2044590694))^(((tmp = 1681238509, tmp)>>(-2801649769))-x))));
+  assertEquals(1, x /= x);
+  assertEquals(1, x %= (x/(x-x)));
+  assertEquals(1.3525631913093335e-9, x /= (739336991));
+  assertEquals(0, x &= ((x&(x|(-1530424204)))<<((((tmp = -295143065.9115021, tmp)>>x)+x)<<x)));
+  assertEquals(0, x <<= (-1311017801));
+  assertEquals(-0, x /= (-667133339.1918633));
+  assertEquals(1038307283, x += (1038307283));
+  assertEquals(506985, x >>>= ((tmp = 1550624472.9157984, tmp)^x));
+  assertEquals(506985, x >>>= ((254646626)<<(tmp = 1572845412.744642, tmp)));
+  assertEquals(32447040, x <<= (tmp = -2427326042, tmp));
+  assertEquals(0, x -= (x<<((x|x)>>>x)));
+  assertEquals(0, x &= x);
+  assertEquals(0, x &= ((-484420357)|((tmp = 807540590.6132902, tmp)/(x/x))));
+}
+f();
diff --git a/deps/v8/test/mjsunit/numops-fuzz-part4.js b/deps/v8/test/mjsunit/numops-fuzz-part4.js
new file mode 100644
index 0000000000..c4ea614b32
--- /dev/null
+++ b/deps/v8/test/mjsunit/numops-fuzz-part4.js
@@ -0,0 +1,1177 @@
+// Copyright 2011 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+function f() {
+  var x = 0;
+  var tmp = 0;
+  assertEquals(-890607324, x ^= ((tmp = -890607324, tmp)>>((((-2876826295)>>x)<<((tmp = 2351495148.117994, tmp)>>(tmp = 1368611893.274765, tmp)))*(tmp = 1531795251, tmp))));
+  assertEquals(-729075363, x += (x+(tmp = 1052139285, tmp)));
+  assertEquals(531550884933581760, x *= x);
+  assertEquals(1980836332, x ^= ((-746269795.2320724)-((2400458512)>>((1290672548)>>>((((1536843439.5629003)&(3185059975.158061))*(tmp = -1339249276.2667086, tmp))&x)))));
+  assertEquals(941373096, x %= ((x+(-451098412))^(tmp = 1725497732, tmp)));
+  assertEquals(-1766019323, x += (tmp = -2707392419, tmp));
+  assertEquals(2528947973, x >>>= (x^(-896237435.3809054)));
+  assertEquals(-263192576, x <<= (-866361580));
+  assertEquals(-2008, x >>= (-2608071791));
+  assertEquals(-88, x %= (((-1076807218.4792447)&((tmp = 601044863, tmp)>>((tmp = 1228976729, tmp)+((((-2711426325)*x)|x)|(x%(-2700007330.3266068))))))&(tmp = 3147972836.778858, tmp)));
+  assertEquals(1762886843, x ^= (tmp = 2532080403, tmp));
+  assertEquals(1762886843, x %= ((((((tmp = -2059247788, tmp)>>x)/x)+(x<<x))^x)>>>(-1969283040.3683646)));
+  assertEquals(4812334726.587896, x += (tmp = 3049447883.587897, tmp));
+  assertEquals(1, x /= x);
+  assertEquals(1, x *= x);
+  assertEquals(-2150507334, x -= ((tmp = 1578221999, tmp)+(tmp = 572285336, tmp)));
+  assertEquals(-4546475858941548500, x *= ((tmp = -931533139.5546813, tmp)^(tmp = 3061503275, tmp)));
+  assertEquals(-269064192, x |= ((207217276.91936445)<<(tmp = -957353678.4997551, tmp)));
+  assertEquals(1, x /= x);
+  assertEquals(1, x <<= (((1463856021.8616743)%(x*(tmp = -2286419102, tmp)))/(-2852887593)));
+  assertEquals(2223868564.8383617, x *= (tmp = 2223868564.8383617, tmp));
+  assertEquals(918797189.9033995, x -= ((1305071374.9349623)%(x+(2211992629))));
+  assertEquals(-2212004787.4668465, x -= (tmp = 3130801977.370246, tmp));
+  assertEquals(31783, x >>= (2951958960));
+  assertEquals(31783, x ^= ((((tmp = -2441511566, tmp)&((tmp = 91427553.90168321, tmp)+((tmp = 3001737720.327718, tmp)%x)))>>>(-2263859841))>>>((2109161329)>>(tmp = -2816295136.7443414, tmp))));
+  assertEquals(4068224, x <<= (x%((tmp = -682576250.4464607, tmp)*(x/(((x-x)>>>(x&((((x<<(x<<x))>>>((((2243036981.528562)/(((-1839328916.9411087)>>(-1907748022.162144))<<(x+x)))+((tmp = 2362574171, tmp)<<(tmp = 1987834539, tmp)))|(-444329240)))|(399451601.1717081))>>x)))&(968363335.6089249))))));
+  assertEquals(0.0030991932898194294, x /= ((tmp = 1067316540.5529796, tmp)^(-2388640366)));
+  assertEquals(0, x >>= x);
+  assertEquals(0, x >>>= (tmp = -393433349.1636851, tmp));
+  assertEquals(0, x *= (((x^(((1806955787.471396)<<x)^((517668047.55566347)>>>(x%(x<<(tmp = -276586733.4844558, tmp))))))%(1661242196.1472542))|x));
+  assertEquals(0, x |= (x>>x));
+  assertEquals(-155236210, x |= (tmp = -155236210.19366312, tmp));
+  assertEquals(-606392, x >>= ((tmp = -1533446042.97781, tmp)^x));
+  assertEquals(-1, x >>= (936126810));
+  assertEquals(2325115611, x -= (-2325115612));
+  assertEquals(0, x -= x);
+  assertEquals(0, x >>= (tmp = -354826623, tmp));
+  assertEquals(-0, x *= (-1232528947.7321298));
+  assertEquals(0, x |= x);
+  assertEquals(0, x <<= (((tmp = 187758893.4254812, tmp)&(x-(tmp = 648201576, tmp)))&(385106597)));
+  assertEquals(0, x >>= (tmp = 2554891961, tmp));
+  assertEquals(-1311492611.2970417, x += (-1311492611.2970417));
+  assertEquals(-688179220.3221785, x += (623313390.9748632));
+  assertEquals(1416835528, x &= (tmp = 1953739224, tmp));
+  assertEquals(-11.04719252755072, x /= (-128252995));
+  assertEquals(-6.287413042114223e-9, x /= (tmp = 1757033052.1558928, tmp));
+  assertEquals(-4231171, x |= (((((2022730885.7773404)*((-2495777565.221855)|(tmp = 274627292, tmp)))<<(-3072596920.4902725))>>>((-2215057529)+(-1134713759.4247034)))^((tmp = -1888181788, tmp)/(572025985.2748461))));
+  assertEquals(-4194305, x |= ((tmp = 167328318.038759, tmp)>>>(153800904.34551537)));
+  assertEquals(-1316525687, x -= (1312331382));
+  assertEquals(1448723245.7863903, x += (2765248932.7863903));
+  assertEquals(1.7219707102205526, x /= (tmp = 841317008, tmp));
+  assertEquals(1872027792.5217001, x *= (x|(tmp = 1087142645.6665378, tmp)));
+  assertEquals(3504488055973669400, x *= x);
+  assertEquals(-1075254784, x |= x);
+  assertEquals(-5, x >>= (((844461331.8957539)-((x&x)<<((tmp = 1443904777, tmp)+(tmp = 736164505.3670597, tmp))))-(((tmp = 1348422110, tmp)>>((tmp = -2878252514, tmp)/(-1175443113)))|((-2138724317)%(2057081133)))));
+  assertEquals(-3.038875804165675e-9, x /= (1645345292.8698258));
+  assertEquals(1.25204541454491e-18, x /= (-2427129055.274914));
+  assertEquals(-1.7151576137235622e-9, x *= (-1369884505.6247284));
+  assertEquals(1590804618, x ^= (1590804618.4910607));
+  assertEquals(5061318665300252000, x *= (x+x));
+  assertEquals(5061318665300252000, x %= ((tmp = 1102144242, tmp)*x));
+  assertEquals(-7, x >>= (2772167516.624264));
+  assertEquals(16383, x >>>= (-2979259214.5855684));
+  assertEquals(47108415435, x *= ((2944456517.839616)>>>(1041288554.5330646)));
+  assertEquals(61, x >>>= (x^(((-1305163705)<<((948566605)-x))-x)));
+  assertEquals(0, x %= x);
+  assertEquals(0, x ^= (((tmp = 1918861879.3521824, tmp)/((x%(tmp = 945292773.7188392, tmp))%(x|x)))>>x));
+  assertEquals(-0, x *= ((((x|((2810775287)|(tmp = 1265530406, tmp)))^((tmp = 3198912504.175658, tmp)-(((tmp = 1422607729.281712, tmp)<<(tmp = 2969836271.8682737, tmp))&x)))<<((tmp = 844656612, tmp)*(((((tmp = -828311659, tmp)%(((-2083870654)>>>(x^(((((933133782)-(tmp = 1033670745, tmp))-(629026895.4391923))%((-605095673.8097742)*((((-227510375.38460112)*x)+x)&(((((tmp = 472873752.68609154, tmp)^(tmp = 2815407038.712165, tmp))+((x>>>((tmp = -1331030665.3510115, tmp)>>>(2281234581)))-(x>>>x)))&(tmp = -2160840573.325921, tmp))&x))))<<(tmp = 1411888595, tmp))))|(((tmp = -915703839.0444739, tmp)/((x+(418836101.8158506))%(-1112605325.4404268)))&((-3098311830.6721926)-x))))-((49446671.477988124)*(-2522433127)))+((tmp = 443068797, tmp)>>(tmp = 418030554.97275746, tmp)))*((tmp = 38931296.738208175, tmp)+(1842742215.3282685)))))-((tmp = 1325672181.205841, tmp)^(tmp = 669284428, tmp))));
+  assertEquals(-0, x *= (tmp = 93843030, tmp));
+  assertEquals(0, x ^= x);
+  assertEquals(0, x ^= x);
+  assertEquals(0, x <<= x);
+  assertEquals(0, x >>>= (x%((((((tmp = -107458601, tmp)>>(x*((x|((tmp = 2117286494, tmp)>>((x^(tmp = 114214295.42048478, tmp))>>>(tmp = 1032826615, tmp))))&((x*x)&(-225386977.67686415)))))^((-780566702.5911419)+(-1113319771)))|(((x^x)<<(1288064444))>>(-2292704291.619477)))>>(365125945))-((tmp = -1986270727.235776, tmp)/x))));
+  assertEquals(-0, x *= (((-18925517.67125845)|((((-1975220517)+(tmp = -1250070128.296064, tmp))+(1085931410.5895243))<<(((x|(((x*(tmp = 160207581.50536323, tmp))|(tmp = 1798744469.7958293, tmp))-x))>>>(((x+((x%x)&((((x^x)<<((tmp = 2538012074.623554, tmp)^x))*x)&x)))/(x+(tmp = -2563837407, tmp)))/(tmp = 2189564730, tmp)))/(((-1703793330.5770798)<<((176432492)|x))<<(1347017755.345185)))))<<(((tmp = -577100582.7258489, tmp)&x)/(-31246973))));
+  assertEquals(0, x >>>= x);
+  assertEquals(NaN, x %= ((x*(tmp = 1167625971, tmp))&(((tmp = -770445060, tmp)>>((339248786)^((2058689781.2387645)-((-2381162024)*(660448066)))))&x)));
+  assertEquals(NaN, x += ((3088519732.515986)-(-267270786.06493092)));
+  assertEquals(0, x &= (tmp = 2748768426.3393354, tmp));
+  assertEquals(-1109969306, x ^= ((-1109969306)>>>x));
+  assertEquals(-1109969306, x %= (tmp = 1150376563.581773, tmp));
+  assertEquals(-2058145178, x &= (-2057586057));
+  assertEquals(-850185626, x |= ((x^(tmp = 1223093422, tmp))&((-589909669)<<(2299786170))));
+  assertEquals(1489215443, x += (2339401069));
+  assertEquals(-23592960, x <<= x);
+  assertEquals(2063937322, x ^= (-2053296342.2317986));
+  assertEquals(12922122, x %= (x^((-2259987830)>>(x*(((tmp = -799867804.7716949, tmp)&(tmp = -1068744142, tmp))*(((((1091932754.8596292)-((tmp = -1778727010, tmp)>>(((tmp = 1207737073.2689717, tmp)-(x-(tmp = -1191958946, tmp)))+(-631801383.7488799))))-(-618332177))>>>(-156558558))>>>(3032101547.6262517)))))));
+  assertEquals(12922122, x &= x);
+  assertEquals(Infinity, x /= (x%x));
+  assertEquals(0, x &= (x*(-227800722.62070823)));
+  assertEquals(-865648691, x ^= (-865648691));
+  assertEquals(1, x /= (x%(tmp = 1524739353.8907173, tmp)));
+  assertEquals(16, x <<= (x<<(2335214658.789205)));
+  assertEquals(0, x &= ((tmp = 570332368.1239192, tmp)^(-2278439501)));
+  assertEquals(1881145344, x -= (((-569715735.8853142)+(2093355159))<<(tmp = 2788920949, tmp)));
+  assertEquals(0, x ^= x);
+  assertEquals(NaN, x -= ((tmp = -1427789954, tmp)%((((((411038329.49866784)-x)-(x<<((-1330832247)+x)))/x)^((x*(845763550.2134092))>>(tmp = 1427987604.5938706, tmp)))>>>(1857667535))));
+  assertEquals(NaN, x /= (-313793473));
+  assertEquals(0, x >>>= (x/x));
+  assertEquals(1869358566, x -= (-1869358566));
+  assertEquals(-1901664519209545200, x += ((tmp = 944729941.3936644, tmp)*(-2012918653)));
+  assertEquals(-1901664519209545200, x += ((tmp = 1348246793, tmp)/(x&x)));
+  assertEquals(-1576791552, x &= (tmp = 2719250966.739456, tmp));
+  assertEquals(-305087899, x ^= (-2955630491.030272));
+  assertEquals(0, x ^= (x%(1575252839.559443)));
+  assertEquals(4184604407, x += ((((tmp = -244720076.17657042, tmp)|(2819320515))^((((tmp = 1222623743.9184055, tmp)*(-95662379.577173))/(x/(x+(((x-(tmp = -3024718107.6310973, tmp))^(-1494390781))&(tmp = 2284054218.8323536, tmp)))))>>>(tmp = 2090069761, tmp)))>>>(x%x)));
+  assertEquals(3148907440, x -= (((tmp = -332379100.7695112, tmp)-(-1145399547))^(((((((tmp = 3133792677.785844, tmp)+x)<<(2306999139.5799255))>>((tmp = -2051266106, tmp)*(((((x+(((-728654312.8954825)>>(x>>>(((x%x)&(-1587152364))|(((((-2114138294)&x)&(1547554688))^x)-(-1856094268)))))*(((-1135018784)&((x+(tmp = -1444020289, tmp))|x))+x)))>>x)&x)/(2449005489))<<((131073798.64314616)%(x>>>((-2592101383.2205048)^(tmp = -757096673.0381112, tmp)))))))^(2766467316.8307915))-(-2465892914.515834))-((((tmp = 234064056, tmp)^((x>>>(1622627548.7944543))+(-1750474146)))|(-1959662039.4687617))^((-1222880974)&(-2794536175.906498))))));
+  assertEquals(-1157627488, x &= (-1156639323));
+  assertEquals(-1342170624, x <<= ((x/((((1829945345.0613894)/(x*((tmp = 1278865203.0854595, tmp)/(((tmp = -2298274086.519347, tmp)+(tmp = -545203761, tmp))-(tmp = 2712195820, tmp)))))>>>((tmp = 240870798.9384452, tmp)-(tmp = -3188865300.4768195, tmp)))>>>(x%((648799266)>>>(tmp = 24460403.864815235, tmp)))))|((tmp = 232533924, tmp)|x)));
+  assertEquals(-2684341248, x += x);
+  assertEquals(1073755136, x &= (((-662718514.9245079)>>(tmp = -1915462105, tmp))+(tmp = 1478850441.8689613, tmp)));
+  assertEquals(-1073755136, x /= (x|((tmp = -1767915185, tmp)|((325827419.1430224)|(((-1343423676)|(tmp = -1929549501, tmp))|(-866933068.9585254))))));
+  assertEquals(-1073755136, x %= ((tmp = 547342356, tmp)-((tmp = 2213249646.7047653, tmp)-((((((-2463314705)^(tmp = -993331620, tmp))^(((x%x)>>(tmp = 1798026491.3658786, tmp))-(((1024072781)/(tmp = -2407354455, tmp))%(1973295010))))<<(-1966787233))^x)|(-1787730004)))));
+  assertEquals(-1073754452, x |= (tmp = 3099823788.077907, tmp));
+  assertEquals(-1540683096, x &= (-1540674632.7013893));
+  assertEquals(-1540683052, x ^= ((tmp = -126183090, tmp)>>>((-622437575.5788481)|((((tmp = -2947914022, tmp)%(((tmp = 2512586745, tmp)>>x)>>>((27238232.23677671)/(tmp = 3203958551, tmp))))/(tmp = 2906005721.402535, tmp))^((((tmp = 1763897860.737334, tmp)^(1445562340.2485332))/x)+(-2393501217.716533))))));
+  assertEquals(-1258599433, x |= (tmp = 351291767.59661686, tmp));
+  assertEquals(-1241560065, x |= (626346046.5083935));
+  assertEquals(-1241560065, x ^= ((2263372092)/((tmp = -2868907862, tmp)>>>x)));
+  assertEquals(-893685228, x -= (tmp = -347874837, tmp));
+  assertEquals(3401282068, x >>>= (x*x));
+  assertEquals(0, x %= x);
+  assertEquals(0, x >>>= x);
+  assertEquals(-2079237393, x ^= (tmp = 2215729903, tmp));
+  assertEquals(NaN, x %= ((((tmp = 3203450436, tmp)/(2867575150.6528325))&(1864945829))&((x&((((tmp = -1927086741.3438427, tmp)|x)|(-1783290909.3240588))*((-1074778499.0697656)*(x-((tmp = -848983542.8456669, tmp)^(tmp = -1324673961, tmp))))))>>(tmp = -2144580304.245896, tmp))));
+  assertEquals(-43334009, x |= (x^(-43334009.72683525)));
+  assertEquals(-43334009, x &= x);
+  assertEquals(-43334009, x %= (tmp = 1252450645.060542, tmp));
+  assertEquals(-43334009, x |= (((((((tmp = 968062202, tmp)/(x|(tmp = 2766801984, tmp)))*((2173353793.938968)>>(((tmp = -2459317247, tmp)<<(tmp = -2333601397, tmp))>>>((tmp = -578254251.8969193, tmp)*(tmp = 839964110.7893236, tmp)))))&(((1675305119)&(tmp = -929153707, tmp))*((x*x)*x)))/x)|(x/(tmp = 384740559.43867135, tmp)))%(1657362591)));
+  assertEquals(0, x -= x);
+  assertEquals(0, x %= (-1334758781.1087842));
+  assertEquals(0, x -= x);
+  assertEquals(-54, x += ((tmp = -1787151355.470972, tmp)>>((tmp = 237028977, tmp)>>(((2829473542)<<(x>>>(((((((x-(-1950724753))*(((x>>>(2807353513.6283565))<<((-583810779.1155353)>>(x*x)))>>(-1068513265)))^(x^(-696263908.5131407)))%(((tmp = -1325619399, tmp)<<((tmp = -1030194450, tmp)-x))^x))+((-2852768585.3718724)>>(tmp = -3160022361, tmp)))%(x&x))>>(tmp = 2667222702.5454206, tmp))))+((804998368.8915854)<<x)))));
+  assertEquals(-54, x %= (-1601267268.4306633));
+  assertEquals(1, x >>>= (tmp = -543199585.579128, tmp));
+  assertEquals(4.732914708226396e-10, x /= (tmp = 2112862922, tmp));
+  assertEquals(-4266932650, x -= ((((x^((((tmp = 2784618443, tmp)^(tmp = -2271260297.9010153, tmp))|((((tmp = -599752639.7516592, tmp)*(2751967680.3680997))^(tmp = -1478450055.578217, tmp))*x))-x))&((tmp = -520061982, tmp)-((tmp = 1400176711.9637299, tmp)^(((2100417541)|(x+(tmp = -674592897.0420957, tmp)))>>x))))^(tmp = -365650686.7947228, tmp))>>>((-2943521813)&(((tmp = -1888789582, tmp)>>(tmp = 700459655.488978, tmp))+(tmp = -1725725703.655931, tmp)))));
+  assertEquals(224277168, x <<= (tmp = 2885115011.8229475, tmp));
+  assertEquals(224277168, x %= (tmp = -2655345206.442777, tmp));
+  assertEquals(850395136, x <<= (x-(((((-769868538.1729524)/((tmp = -298603579, tmp)%(x^x)))+((2691475692)|(((x>>>(628995710.4745524))^(x<<(((tmp = -1046054749, tmp)|(919868171))-x)))^((-1377678789.8170452)&((3065147797)%(tmp = 2638804433, tmp))))))^(tmp = -2036295169, tmp))&(((tmp = -157844758.08476114, tmp)*(tmp = -2819601496, tmp))&((((tmp = 78921441, tmp)<<(653551762.5197772))/(1801316098))*(-1479268961.8276927))))));
+  assertEquals(1645565728, x ^= (tmp = 1353013024, tmp));
+  assertEquals(1645565728, x >>>= x);
+  assertEquals(3020513544, x += (1374947816));
+  assertEquals(0, x %= x);
+  assertEquals(0, x %= ((((((tmp = -304228072.4115715, tmp)>>>((-90523260.45975709)-(tmp = -3013349171.084838, tmp)))%((-1640997281)*((tmp = -1600634553, tmp)%((tmp = 557387864, tmp)<<((888796080.766409)|(x^((((x%(((((tmp = 1164377954.1041703, tmp)*x)|(2742407432.192806))&((tmp = 1707928950, tmp)<<(1279554132.4481683)))+(tmp = -2108725405.7752397, tmp)))%(tmp = -465060827, tmp))^((tmp = 2422773793, tmp)+x))^((((((((tmp = -1755376249, tmp)^((-267446806)^x))/(((tmp = -1808578662.4939392, tmp)+((tmp = -1997100217, tmp)+x))+(((tmp = -2469853122.411479, tmp)/x)>>(tmp = 660624616.7956645, tmp))))%((x<<((((((tmp = -1701946558, tmp)-(tmp = 133302235, tmp))>>>x)/(738231394))<<(-1060468151.4959564))&(((((-1877380837.4678264)|(tmp = 2366186363, tmp))%x)>>>(-2382914822.1745577))>>((-1874291848.9775913)<<(tmp = 2522973186, tmp)))))<<(-2672141993)))|(tmp = 732379966, tmp))%x)^x)^x))))))))%(tmp = 2385998902.7287374, tmp))*x)+(tmp = -2195749866.017106, tmp)));
+  assertEquals(401488, x ^= (((-320896627)>>>(tmp = 2812780333.9572906, tmp))&(tmp = -2088849328, tmp)));
+  assertEquals(-1661116571.0046256, x += (tmp = -1661518059.0046256, tmp));
+  assertEquals(-1616122720, x <<= x);
+  assertEquals(-1616122720, x >>= x);
+  assertEquals(-390439413, x %= (tmp = -1225683307, tmp));
+  assertEquals(-84189205, x |= ((x|(2054757858))^(((x<<(((x|x)|(((x>>>((-2938303938.1397676)<<((2993545056)^((tmp = -643895708.5427527, tmp)/((1371449825.5345795)-(1896270238.695752))))))-(tmp = 1061837650, tmp))+(x+(tmp = 3072396681, tmp))))>>(x-((((tmp = -1877865355.1550744, tmp)&x)%(-2766344937))>>>(2055121782)))))-((x<<x)|(tmp = -2742351880.1974454, tmp)))<<((-2600270279.219802)>>(-1625612979)))));
+  assertEquals(-168378410, x += x);
+  assertEquals(-168378410, x &= x);
+  assertEquals(-1534983792, x &= (-1501412943));
+  assertEquals(-1821543761, x ^= (938439487));
+  assertEquals(-1821543761, x &= (x^(((tmp = -4237854, tmp)>>x)/x)));
+  assertEquals(2358, x >>>= (2954252724.620632));
+  assertEquals(4716, x <<= ((-75522382.8757689)/((tmp = 1074334479, tmp)|((tmp = -720387522, tmp)>>(x>>>(-3085295162.6877327))))));
+  assertEquals(-1313079316, x |= (2981887904.020387));
+  assertEquals(-1957790646, x -= (644711330));
+  assertEquals(17831, x >>>= ((tmp = -2550108342, tmp)-(((tmp = 454671414.0146706, tmp)+(-661129693.9333956))>>(x>>>(((tmp = 1752959432.3473055, tmp)*(-2619510342.1812334))%(tmp = -456773274.2411971, tmp))))));
+  assertEquals(689287937.6879716, x -= ((tmp = -397126863.6879716, tmp)-(((x>>x)^(x/(-1387467129.6278908)))|((x>>((tmp = -2361114214.8413954, tmp)<<(tmp = -805670024.4717407, tmp)))<<(-2724018098)))));
+  assertEquals(1378575875.3759432, x += x);
+  assertEquals(84112428460187.8, x *= (((((2681425112.3513584)%(tmp = -1757945333, tmp))|x)>>(-1793353713.0003397))%x));
+  assertEquals(-3221, x >>= (-1976874128));
+  assertEquals(-3221, x %= (((tmp = 2318583056.834932, tmp)|((tmp = -1016115125, tmp)+((-472566636.32567954)+x)))|(tmp = 3135899138.065598, tmp)));
+  assertEquals(-6596608, x <<= x);
+  assertEquals(-1249902592, x <<= (((tmp = -2025951709.5051148, tmp)/((-465639441)<<(-2273423897.9682302)))*((tmp = -2408892408.0294642, tmp)-(tmp = 1017739741, tmp))));
+  assertEquals(73802092170444800, x *= (tmp = -59046275, tmp));
+  assertEquals(-1619001344, x <<= x);
+  assertEquals(0, x <<= (tmp = 1610670303, tmp));
+  assertEquals(-0, x *= ((((x+(tmp = 2039867675, tmp))|(tmp = 399355061, tmp))<<(1552355369.313559))^x));
+  assertEquals(0, x *= x);
+  assertEquals(0, x >>>= (((2875576018.0610805)>>x)%(tmp = -2600467554, tmp)));
+  assertEquals(2290405226.139538, x -= (-2290405226.139538));
+  assertEquals(0, x %= x);
+  assertEquals(0, x ^= (((tmp = 2542309844.485515, tmp)-x)%((-2950029429.0027323)/(tmp = 2943628481, tmp))));
+  assertEquals(0, x += x);
+  assertEquals(0, x -= x);
+  assertEquals(0, x >>>= (tmp = 2337330038, tmp));
+  assertEquals(0, x += (x/(((292272669.0808271)&(tmp = 2923699026.224247, tmp))^(tmp = 367745855, tmp))));
+  assertEquals(0, x &= x);
+  assertEquals(0, x %= ((tmp = 1565155613.3644123, tmp)<<(-308403859.5844681)));
+  assertEquals(-1845345399.3731332, x += (tmp = -1845345399.3731332, tmp));
+  assertEquals(5158590659731951000, x *= (-2795460763.8680177));
+  assertEquals(-364664, x >>= (1837745292.5701954));
+  assertEquals(1, x /= x);
+  assertEquals(-860616114.8182092, x += ((tmp = 2076961323.1817908, tmp)+(-2937577439)));
+  assertEquals(-860616115, x ^= ((x*(tmp = 2841422442.583121, tmp))>>>((tmp = 1929082917.9039137, tmp)>>(-2602087246.7521305))));
+  assertEquals(-38387843, x |= (3114677624));
+  assertEquals(2927507837, x += (tmp = 2965895680, tmp));
+  assertEquals(1, x /= x);
+  assertEquals(-1792887531, x *= (-1792887531));
+  assertEquals(-0, x %= ((x^x)+x));
+  assertEquals(-0, x %= (tmp = 2800752702.562547, tmp));
+  assertEquals(1384510548, x ^= (tmp = 1384510548, tmp));
+  assertEquals(42251, x >>= (1645421551.363844));
+  assertEquals(0, x >>>= (17537561));
+  assertEquals(-2076742862, x ^= (tmp = 2218224434, tmp));
+  assertEquals(-2.790313825067623, x /= (744268563.3934636));
+  assertEquals(5313538, x &= (((((tmp = -2406579239.0691676, tmp)+((-1470174628)+(((tmp = -783981599, tmp)<<(tmp = -1789801141.272646, tmp))^(((((((tmp = -844643189.5616491, tmp)&(tmp = -252337862, tmp))&(x|x))%((-3159642145.7728815)+(tmp = 2149920003.9525595, tmp)))&(x>>(1737589807.9431858)))-((((((((1610161800)<<(497024994))>>x)<<x)/x)>>>x)&x)-(757420763.2141517)))-(tmp = -3061016994.9596977, tmp)))))/(tmp = 1810041920.4089384, tmp))&(tmp = 5887654.786785364, tmp))&((tmp = 1626414403.2432103, tmp)+(x%x))));
+  assertEquals(-2147483648, x <<= (tmp = 1304102366.8011155, tmp));
+  assertEquals(-208418816, x %= (((((-2850404799)*(x+(3158771063.226051)))*(-2017465205))/(x>>x))>>(x%(tmp = 2760203322, tmp))));
+  assertEquals(-2189223477, x -= (1980804661));
+  assertEquals(-859239912, x ^= (tmp = 2974421971.3544703, tmp));
+  assertEquals(-1599850415, x ^= (tmp = -2475871671.140151, tmp));
+  assertEquals(-1600636847, x += ((((tmp = -1311002944, tmp)<<((tmp = -1137871342, tmp)<<(tmp = 115719116, tmp)))/(413107255.6242596))<<(x>>((((-1908022173)&(((-1519897333)^((x>>(x*(tmp = -2886087774.426503, tmp)))*(tmp = 530910975, tmp)))+(-2579617265.889692)))+((2518127437.127563)>>>((tmp = 481642471.56441486, tmp)>>>(792447239))))^(x<<(248857393.6819017))))));
+  assertEquals(-191, x >>= (-1591265193));
+  assertEquals(-192.27421813247196, x += ((tmp = 2627329028.207775, tmp)/(tmp = -2061914644.9523563, tmp)));
+  assertEquals(1230613220, x ^= (tmp = 3064354212.307105, tmp));
+  assertEquals(1230613220, x &= x);
+  assertEquals(1230613220, x %= (1833479205.1064768));
+  assertEquals(1230613220, x >>>= ((((1559450742.1425748)|((2151905260.956583)*(1213275165)))%(514723483.12764716))>>>x));
+  assertEquals(1230613493, x |= ((((3004939197.578903)*(tmp = -576274956, tmp))+((tmp = 1037832416.2243971, tmp)^x))>>>(tmp = 2273969109.7735467, tmp)));
+  assertEquals(2461226986, x += x);
+  assertEquals(-27981, x >>= ((692831755.8048055)^((tmp = -1593598757, tmp)%(x-((((-1470536513.882593)|((tmp = -2716394020.466401, tmp)|(tmp = 2399097686, tmp)))&x)%x)))));
+  assertEquals(-1.4660454948034359e+23, x *= (((x>>>((((((tmp = -3056016696, tmp)<<(-2882888332))*(2041143608.321916))&(((tmp = -634710040, tmp)|(tmp = -2559412457, tmp))>>(1916553549.7552106)))%((-2150969350.3643866)*x))<<((x*(tmp = 2657960438.247278, tmp))|x)))%((tmp = 526041379, tmp)*(tmp = 2514771352.4509397, tmp)))*(1219908294.8107886)));
+  assertEquals(-1.4660454948034359e+23, x -= ((1709004428)>>(((x|(-422745730.626189))%x)>>x)));
+  assertEquals(-2247766068, x %= (-3105435508));
+  assertEquals(-386845856.0649812, x -= (-1860920211.9350188));
+  assertEquals(-386846803.0649812, x -= ((((-3214465921)|((tmp = -1326329034, tmp)+(((tmp = -1203188938.9833462, tmp)%((((((-1318276502)+(x+x))^((x<<x)%(x>>>x)))+(tmp = -439689881, tmp))+((-1455448168.695214)^(x-((-388589993)>>((((940252202)^(-2218777278))|x)/(tmp = -1007511556, tmp))))))&(-140407706.28176737)))-(x/((888903270.7746506)-((tmp = -2885938478.632409, tmp)<<(((((tmp = -1750518830.270917, tmp)>>(((((((tmp = 868557365.7908674, tmp)/(tmp = -2805687195.5172157, tmp))*x)|((((((-1342484550)-((tmp = 1089284576, tmp)^(tmp = 120651272, tmp)))<<(tmp = 2230578669.4642825, tmp))-(x*x))%(x^(((tmp = -3177941534, tmp)+(x>>(-1595660968)))/(-1738933247))))>>>(tmp = 2860175623, tmp)))-(((2392690115.8475947)>>>(tmp = -1754609670.2068992, tmp))>>>(tmp = 2615573062, tmp)))-(tmp = 2590387730, tmp))^((x+((((x-(tmp = -2823664112.4548965, tmp))*(200070977))>>>(((x|((((tmp = 1361398, tmp)>>((tmp = 1649209268, tmp)%x))+x)+(x>>>(tmp = -2379989262.1245675, tmp))))|(x^((tmp = -647953298.7526417, tmp)-x)))&(tmp = -1881232501.1945808, tmp)))>>>x))%(x^(tmp = -1737853471.005935, tmp)))))>>>(427363558))>>>((tmp = -3076726422.0846386, tmp)^(-1518782569.1853383)))/x)))))))|x)>>>(1854299126)));
+  assertEquals(-386846803.0649812, x -= (x%x));
+  assertEquals(238532, x >>>= (-448890706.10774803));
+  assertEquals(232, x >>>= (-791593878));
+  assertEquals(232, x <<= (((x^((x-x)&(tmp = 1219114201, tmp)))/(tmp = -427332955, tmp))%(tmp = 1076283154, tmp)));
+  assertEquals(210, x ^= (x>>>((2975097430)>>>x)));
+  assertEquals(1, x /= x);
+  assertEquals(2317899531, x *= (2317899531));
+  assertEquals(1131786, x >>>= x);
+  assertEquals(2301667519.6379366, x += ((tmp = 193109669.63793683, tmp)+(tmp = 2107426064, tmp)));
+  assertEquals(3842614963.6379366, x += (((-1676516834)>>>(tmp = -1817478916.5658965, tmp))^(((tmp = 1122659711, tmp)>>>(tmp = -2190796437, tmp))|(tmp = -2754023244, tmp))));
+  assertEquals(-452352333, x &= x);
+  assertEquals(-863, x >>= x);
+  assertEquals(-3.777863669459606e-7, x /= (2284359827.424491));
+  assertEquals(-3.777863669459606e-7, x %= ((tmp = -2509759238, tmp)>>>x));
+  assertEquals(0, x <<= (-814314066.6614306));
+  assertEquals(0, x %= (tmp = 190720260, tmp));
+  assertEquals(2301702913, x += (2301702913));
+  assertEquals(-249158048, x >>= (tmp = -2392013853.302008, tmp));
+  assertEquals(-249158048, x >>= x);
+  assertEquals(-498316096, x += x);
+  assertEquals(-498316096, x %= (tmp = 2981330372.914731, tmp));
+  assertEquals(106616.2199211318, x *= (((((tmp = 1020104482.2766557, tmp)^((tmp = -416114189.96786, tmp)>>>(1844055704)))|(tmp = 1665418123, tmp))>>(1826111980.6564898))/(-2446724367)));
+  assertEquals(106616, x |= x);
+  assertEquals(1094927345, x -= (((-1229759420)|(741260479.7854375))-x));
+  assertEquals(8353, x >>= x);
+  assertEquals(0, x >>>= (tmp = -327942828, tmp));
+  assertEquals(-953397616.8888416, x += (tmp = -953397616.8888416, tmp));
+  assertEquals(-1906641240.7776833, x += (x+((-3033450184.9106326)>>>(tmp = 2090901325.5617187, tmp))));
+  assertEquals(-1906641240.7776833, x %= (tmp = 2584965124.3953505, tmp));
+  assertEquals(-1098907671, x |= (tmp = -1272590495, tmp));
+  assertEquals(-1.8305258600334393, x /= (600323489));
+  assertEquals(-1, x &= x);
+  assertEquals(-1, x |= ((x+x)-x));
+  assertEquals(1, x *= x);
+  assertEquals(867473898, x ^= (tmp = 867473899.0274491, tmp));
+  assertEquals(6, x >>>= (tmp = 1174763611.341228, tmp));
+  assertEquals(0, x >>= ((689882795)^(2250084531)));
+  assertEquals(0, x /= (tmp = 2545625607, tmp));
+  assertEquals(0, x >>= x);
+  assertEquals(0, x += x);
+  assertEquals(0, x -= (x*(-1098372339.5157008)));
+  assertEquals(NaN, x %= x);
+  assertEquals(NaN, x -= (tmp = -1797344676.375759, tmp));
+  assertEquals(1121476698, x |= (tmp = 1121476698, tmp));
+  assertEquals(1, x /= x);
+  assertEquals(1, x &= (-191233693));
+  assertEquals(330137888.92595553, x += (330137887.92595553));
+  assertEquals(-1792236714, x ^= (tmp = 2256609910, tmp));
+  assertEquals(269000724, x &= (316405813.62093115));
+  assertEquals(256, x >>= x);
+  assertEquals(256, x %= ((2556320341.54669)|(1066176021.2344948)));
+  assertEquals(256, x |= x);
+  assertEquals(131072, x <<= ((-1650561175.8467631)|x));
+  assertEquals(-286761951, x -= ((tmp = 287024095, tmp)-((-2293511421)&(x|x))));
+  assertEquals(-1561852927, x &= (3002663949.0989227));
+  assertEquals(-460778761, x %= (tmp = -550537083, tmp));
+  assertEquals(-3023749308.0492287, x += (tmp = -2562970547.0492287, tmp));
+  assertEquals(-481313332.04922867, x %= ((x|((tmp = -855929299, tmp)%((2181641323)%(x|(220607471.33018696)))))&x));
+  assertEquals(17510668, x &= (tmp = 363557663, tmp));
+  assertEquals(12552, x &= (3020225307));
+  assertEquals(1814655896, x |= ((x<<(((-1475967464)*(-3122830185))*x))+(x^(-2480340864.2661023))));
+  assertEquals(-3209124403525266400, x -= ((1146847590)*(tmp = 2798213497, tmp)));
+  assertEquals(-6418248807050533000, x += x);
+  assertEquals(1.1856589432073933e+28, x *= (-1847324681.313275));
+  assertEquals(-1238853292, x ^= (-1238853292));
+  assertEquals(-77428331, x >>= (x&((((2043976651.8514216)>>>x)^(x>>>(((tmp = -1785122464.9720652, tmp)%x)<<(1570073474.271266))))*x)));
+  assertEquals(2011, x >>>= x);
+  assertEquals(2011, x &= x);
+  assertEquals(0, x >>= (-2682377538));
+  assertEquals(-1.1367252770299785, x -= (((tmp = 2704334195.566802, tmp)/(2379056972))%((((-1764065164)*((((468315142.8822602)>>((x%(((tmp = 2537190513.506641, tmp)+((x&(x|((tmp = -947458639, tmp)^(2653736677.417406))))*((x<<((1243371170.1759553)>>>(((tmp = 1572208816, tmp)<<((tmp = 963855806.1090456, tmp)>>>x))%((-3078281718.7743487)*x))))^(-1154518374))))^(-2839738226.6314087)))^((-2865141241.190915)*(-2400659423.8207664))))>>((tmp = 32940590, tmp)/(tmp = 2917024064.570817, tmp)))+(((27601850)/(tmp = 3168834986, tmp))>>x)))+(tmp = 2528181032.600125, tmp))/(3162473952))));
+  assertEquals(-1697395408.7948515, x -= (1697395407.6581264));
+  assertEquals(1536992607912062500, x *= (tmp = -905500627.5781817, tmp));
+  assertEquals(102759872, x >>= (tmp = -707887133.4484048, tmp));
+  assertEquals(102759872, x %= (tmp = -1764067619.7913327, tmp));
+  assertEquals(12543, x >>>= (-144142995.1469829));
+  assertEquals(-2059555229.2592103, x += ((-2059555229.2592103)-x));
+  assertEquals(-537022593, x |= (tmp = -2770761410.407701, tmp));
+  assertEquals(23777505, x ^= (-560496738.6854918));
+  assertEquals(-64329014115772310, x *= ((tmp = -2729234369.198843, tmp)+x));
+  assertEquals(189083830, x ^= (tmp = 933619934, tmp));
+  assertEquals(189083830, x %= ((tmp = -2918083254, tmp)-(x|(x^(-2481479224.0329475)))));
+  assertEquals(378167660, x += x);
+  assertEquals(-0.45833387791900504, x /= ((tmp = 2727991875.241294, tmp)<<(tmp = 2570034571.9084663, tmp)));
+  assertEquals(0, x <<= x);
+  assertEquals(-0, x /= (tmp = -67528553.30662966, tmp));
+  assertEquals(0, x <<= (938440044.3983492));
+  assertEquals(-945479171, x ^= (tmp = -945479171, tmp));
+  assertEquals(-225632619284361200, x *= (238643670.00884593));
+  assertEquals(-0, x %= x);
+  assertEquals(-585826304, x ^= ((-1256265560)<<(tmp = 1144713549, tmp)));
+  assertEquals(-671583855, x ^= (183333265.1468178));
+  assertEquals(-484311040, x <<= x);
+  assertEquals(-3969762.62295082, x /= ((((tmp = -1164308668.931008, tmp)-x)%x)>>>(((397816647)>>(-1605343671.4070785))<<x)));
+  assertEquals(758097879, x ^= ((tmp = -2871307491, tmp)^(-2043176492.646442)));
+  assertEquals(0, x *= ((x>>(tmp = 1983292927, tmp))&(tmp = -860505131.4484091, tmp)));
+  assertEquals(0, x <<= x);
+  assertEquals(0, x &= x);
+  assertEquals(0, x %= ((3132981707)-(-2832016477)));
+  assertEquals(0, x >>= (x<<((1830195133.0342631)>>>(tmp = -1003969250, tmp))));
+  assertEquals(NaN, x %= x);
+  assertEquals(NaN, x += (tmp = 273271019.87603223, tmp));
+  assertEquals(NaN, x += (625749326.1155348));
+  assertEquals(0, x >>= (tmp = -531039433.3702333, tmp));
+  assertEquals(0, x -= (((tmp = 2029464099, tmp)-(x-(tmp = -329058111.411458, tmp)))*(x<<x)));
+  assertEquals(-0, x *= ((-1112957170.5613296)|((tmp = 847344494, tmp)>>>(tmp = 2735119927, tmp))));
+  assertEquals(-0, x /= (tmp = 544636506, tmp));
+  assertEquals(0, x >>>= (x^(545093699)));
+  assertEquals(0, x %= (((tmp = -2208409647.5052004, tmp)+(3083455385.374988))+(((-482178732.7077277)*x)>>>((2661060565)*(-2125201239)))));
+  assertEquals(0, x >>>= (-212334007.34016395));
+  assertEquals(0.7004300865203454, x -= ((2032883941)/(-2902336693.0154715)));
+  assertEquals(0, x <<= (x<<((265868133.50175047)>>>(1162631094))));
+  assertEquals(604920272.4394834, x -= (-604920272.4394834));
+  assertEquals(604920272, x &= x);
+  assertEquals(0, x <<= (((-1961880051.1127694)%(tmp = 1715021796, tmp))|((tmp = 2474759639.4587016, tmp)|(243416152.55635))));
+  assertEquals(-46419074, x |= (((tmp = -518945938.5238774, tmp)%((x+(tmp = 242636408, tmp))+(-1974062910)))|(1546269242.0259726)));
+  assertEquals(-46419074, x += ((-629802130)*((tmp = -658144149, tmp)%((-905005358.5370393)>>>x))));
+  assertEquals(-46419074, x |= (x%(-1103652494)));
+  assertEquals(7892881050983985, x *= (-170035297.36469936));
+  assertEquals(1105701997.4273424, x %= ((((-490612260.0023911)>>>(tmp = 1803426906, tmp))^(x%(2725270344.2568116)))-(1010563167.8934317)));
+  assertEquals(1088619532, x &= (-2232199650));
+  assertEquals(1073807364, x &= (-888024506.5008001));
+  assertEquals(1153062254980628500, x *= x);
+  assertEquals(1153062255703627000, x -= (tmp = -722998613.897227, tmp));
+  assertEquals(-1141418584, x |= (3017232552.4814596));
+  assertEquals(-373464140, x ^= (-2914372068));
+  assertEquals(994050048, x <<= x);
+  assertEquals(0, x ^= x);
+  assertEquals(0, x &= (tmp = -3166402389, tmp));
+  assertEquals(0, x &= ((-1760842506.337213)|(tmp = 2538748127.795164, tmp)));
+  assertEquals(-0, x /= (-2635127769.808626));
+  assertEquals(0, x &= ((((tmp = 1414701581, tmp)^(((2425608769)/((x<<x)^(x-x)))^((tmp = -2641946468.737288, tmp)|(tmp = -313564549.1754241, tmp))))*(tmp = -2126027460, tmp))|(-2255015479)));
+  assertEquals(225482894, x ^= (225482894.8767246));
+  assertEquals(0, x ^= x);
+  assertEquals(306216231, x += (tmp = 306216231, tmp));
+  assertEquals(306216231, x -= ((-465875275.19848967)&((-806775661.4260025)/((((-184966089.49763203)>>>((x>>x)+((tmp = -1951107532, tmp)|x)))%x)*((2704859526.4047284)%((x*x)>>x))))));
+  assertEquals(30754, x &= (1706162402.033193));
+  assertEquals(30454.010307602264, x -= (((590456519)>>>(tmp = 2713582726.8181214, tmp))/x));
+  assertEquals(8419062, x |= ((2848886788)<<(tmp = 2993383029.402275, tmp)));
+  assertEquals(16, x >>= (tmp = -1651287021, tmp));
+  assertEquals(1, x /= x);
+  assertEquals(-1407643485, x ^= (-1407643486));
+  assertEquals(2, x >>>= (-1126004674));
+  assertEquals(470812081, x ^= ((-2411718964)>>>x));
+  assertEquals(550443688.6407901, x += (tmp = 79631607.6407901, tmp));
+  assertEquals(3669092443.64079, x -= (-3118648755));
+  assertEquals(-625874853, x <<= (((tmp = -1640437346, tmp)/(((x*x)>>>x)<<x))/x));
+  assertEquals(-1431439050363516700, x *= (2287101077));
+  assertEquals(-1921660672, x |= ((((((((-1912249689.9978154)&(-1676922742.5343294))*(2625527768))<<((820676465)^(((x+(tmp = -852743692, tmp))&((x-((((1361714551)/(311531668))>>>(tmp = -1330495518.8175917, tmp))<<(((tmp = 1369938417.8760853, tmp)*(-1217947853.8942266))<<(-2048029668))))-(-513455284)))>>>(tmp = 1980267333.6201067, tmp))))<<(((1503464217.2901971)>>(tmp = 2258265389, tmp))>>>(1868451148)))&(x-(x^(tmp = -1565209787, tmp))))*x)<<(tmp = -2426550685, tmp)));
+  assertEquals(-1921660672, x %= (((tmp = 523950472.3315773, tmp)+(((2971865706)^x)-x))&(-1773969177)));
+  assertEquals(420176973.1169958, x += (2341837645.116996));
+  assertEquals(420176973, x >>>= (((tmp = -2485489141, tmp)<<((tmp = -2520928568.360244, tmp)+x))&(543950045.0932506)));
+  assertEquals(50, x ^= (x|((tmp = 2001660699.5898843, tmp)>>>(tmp = 1209151128, tmp))));
+  assertEquals(138212770720.96973, x *= (2764255414.4193945));
+  assertEquals(-28683, x |= (((-535647551)|x)>>((((2065261509)>>(-354214733))*x)+(-3218217378.2592907))));
+  assertEquals(1627048838, x ^= (tmp = -1627044749, tmp));
+  assertEquals(-839408795, x ^= (2903337187.480303));
+  assertEquals(-1000652427, x += (tmp = -161243632, tmp));
+  assertEquals(740237908.4196916, x += ((tmp = 1587000348, tmp)+(tmp = 153889987.41969144, tmp)));
+  assertEquals(Infinity, x /= (((((-615607376.1012697)&(57343184.023578644))+((-1967741575)|(-3082318496)))<<(((tmp = -958212971.99792, tmp)>>(tmp = 2962656321.3519197, tmp))-(x|(x*(969365195)))))<<(tmp = -1739470562.344624, tmp)));
+  assertEquals(-Infinity, x /= ((tmp = -1736849852, tmp)%x));
+  assertEquals(0, x <<= x);
+  assertEquals(0, x %= (tmp = -226505646, tmp));
+  assertEquals(1982856549, x -= (((x+(-1982856549))%(-2274946222))>>(x%(((tmp = -1289577208.9097936, tmp)>>x)^(778147661)))));
+  assertEquals(1648018703, x ^= ((3085618856)+((tmp = 1546283467, tmp)&(((x|((-2376306530)*(((((((tmp = -2807616416, tmp)%(((((tmp = 347097983.1491085, tmp)<<x)|(((((1135380667)/(x>>>(tmp = 1679395106, tmp)))^((1277761947)<<((tmp = -1614841203.5244312, tmp)>>x)))%((tmp = 1552249234.2065845, tmp)>>>x))>>>(tmp = -1677859287, tmp)))>>>(2605907565))/(tmp = 2291657422.221277, tmp)))%(((tmp = 425501732.6666014, tmp)>>>(1327403879.455553))+x))>>((tmp = -3075752653.2474413, tmp)&(x-(tmp = -71834630, tmp))))|((((2532199449.6500597)*(-842197612.4577162))%x)>>x))*(((1220047194.5100307)<<((tmp = 1642962251, tmp)<<((-662340)>>>((tmp = -1672316631.3251066, tmp)<<((tmp = 1762690952.542441, tmp)-(x/(1904755683.3277364)))))))>>x))|(((((tmp = 1625817700.7052522, tmp)%(tmp = -2990984460, tmp))|(2395645662))-((2619930607.550086)>>x))^(tmp = 130618712, tmp)))))&((-3142462204.4628367)/(1078126534.8819227)))%(((tmp = -256343715.2267704, tmp)+x)^(tmp = 2009243755, tmp))))));
+  assertEquals(1937698223, x |= (((tmp = 866354374.7435778, tmp)+(tmp = 2751925259.3264275, tmp))%(-2252220455)));
+  assertEquals(0, x -= x);
+  assertEquals(-823946290.6515498, x -= (tmp = 823946290.6515498, tmp));
+  assertEquals(706970324, x ^= (-457174758));
+  assertEquals(32916, x &= (25740724));
+  assertEquals(0, x >>>= ((-1658933418.6445677)|(tmp = -846929510.4794133, tmp)));
+  assertEquals(0, x ^= ((-834208600)/((-1256752740)&(tmp = 1973248337.8973258, tmp))));
+  assertEquals(-1639195806, x += (-1639195806));
+  assertEquals(-1559416478, x ^= ((tmp = 1349893449.0193534, tmp)*(tmp = 2044785568.1713037, tmp)));
+  assertEquals(0, x &= ((x>>(tmp = 1720833612, tmp))/((x+(-1305879952.5854573))^x)));
+  assertEquals(-0, x *= (tmp = -1713182743, tmp));
+  assertEquals(0, x >>= x);
+  assertEquals(NaN, x /= (((x%((x>>>(((-1515761763.5499895)^(-3076528507.626539))<<(tmp = 1293944457.8983147, tmp)))<<(tmp = 276867491.8483894, tmp)))>>(tmp = -2831726496.6887417, tmp))%((((tmp = 1780632637.3666987, tmp)^x)%((208921173.18897665)>>(tmp = 633138136, tmp)))+x)));
+  assertEquals(0, x >>= (tmp = -2755513767.0561147, tmp));
+  assertEquals(0, x |= x);
+  assertEquals(840992300.0324914, x -= ((-840992300.0324914)+x));
+  assertEquals(840992300, x &= x);
+  assertEquals(-1094140277, x ^= (2364029095));
+  assertEquals(-Infinity, x /= ((((((1257084956)<<(2009241695))>>(x+x))*x)>>>x)>>>(205318919.85870552)));
+  assertEquals(-Infinity, x -= (((x>>>(tmp = 3037168809.20163, tmp))&x)*(x&(((806151109)*x)-(tmp = -1741679480.58333, tmp)))));
+  assertEquals(400659949, x ^= (tmp = 400659949, tmp));
+  assertEquals(5, x >>= (tmp = 1175519290, tmp));
+  assertEquals(5, x |= x);
+  assertEquals(0, x >>= x);
+  assertEquals(0, x >>= ((1317772443)&(x<<x)));
+  assertEquals(-1123981819, x ^= (tmp = 3170985477, tmp));
+  assertEquals(1123864651, x ^= ((x%(((x&x)&(-2606227299.7590737))<<((tmp = -2018123078.1859496, tmp)*x)))|(x+(((((1935939774.8139446)/((-1303958190)/(2802816697.32639)))<<((2880056582)*x))+x)+x))));
+  assertEquals(1543368927, x |= (-2795691884));
+  assertEquals(NaN, x /= (x%((tmp = -1129915114, tmp)<<x)));
+  assertEquals(NaN, x += (tmp = -3045743135, tmp));
+  assertEquals(NaN, x -= (tmp = -2849555731.8207827, tmp));
+  assertEquals(NaN, x /= (((((2127485827)>>>((((tmp = 363239924, tmp)>>x)|((((tmp = -1419142286.0523334, tmp)-(x<<x))^(tmp = -1990365089.8283136, tmp))*((tmp = 2780242444.0739098, tmp)>>>(((-2336511023.342298)&x)/(tmp = 2296926221.402897, tmp)))))>>((tmp = 1378982475.6839466, tmp)>>(tmp = -816522530, tmp))))&(x^(tmp = -1668642255.0586753, tmp)))%(((tmp = 921249300.1500335, tmp)^x)*(tmp = -2228816905, tmp)))>>x));
+  assertEquals(-1460685191, x |= (tmp = 2834282105, tmp));
+  assertEquals(-1463439264, x &= (tmp = 2881860064.146755, tmp));
+  assertEquals(20.98100714963762, x /= (((3017150580.7875347)^((250499372.5339837)<<(tmp = -42767556.30788112, tmp)))|(x%(-2829281526))));
+  assertEquals(1, x /= x);
+  assertEquals(2, x += x);
+  assertEquals(8, x <<= x);
+  assertEquals(0, x >>>= ((730174750)>>>x));
+  assertEquals(0, x ^= x);
+  assertEquals(-1459637373, x ^= (2835329923.456409));
+  assertEquals(-1233115861, x ^= (511678120));
+  assertEquals(95682857, x >>>= ((tmp = 1534570885, tmp)|(tmp = -414425499.3786578, tmp)));
+  assertEquals(70254633, x &= (-1502067585));
+  assertEquals(51384749748909710, x *= (tmp = 731407276, tmp));
+  assertEquals(9390482.873469353, x %= (tmp = -592576964.7982686, tmp));
+  assertEquals(4695241, x >>>= (tmp = -1879898431.5395758, tmp));
+  assertEquals(-3129811912538149000, x += (((-727481809)^((3106908604)%x))*((((tmp = -1218123690, tmp)^(x>>((-942923806)^x)))/(x+x))>>>(-1508881888.969373))));
+  assertEquals(1596870236, x ^= (-1135673764.9721224));
+  assertEquals(0, x ^= x);
+  assertEquals(2133782410, x |= (((-2202469371)>>((tmp = 1327588406.183342, tmp)/(tmp = 253581265.7246865, tmp)))-((tmp = 2226575446.838795, tmp)^x)));
+  assertEquals(-81895217.83608055, x -= (tmp = 2215677627.8360806, tmp));
+  assertEquals(812089344, x <<= ((tmp = 882824005, tmp)/(((x>>((((((((tmp = 1211145185, tmp)/((-137817273)-(((tmp = 2165480503.1144185, tmp)-(-1840859887.1288517))*((155886014.8393339)>>((-1984526598)<<(tmp = 1331249058.3246582, tmp))))))>>(x*x))%(2830324652))%(933701061))|(1346496215))^(tmp = -988800810, tmp))+x))>>>x)<<(-2372088384))));
+  assertEquals(812089344, x <<= x);
+  assertEquals(8472, x %= ((((x|(((x%(tmp = 2772099481.664402, tmp))+(2894690616))-x))&(x&(((-715790638.6454093)>>(tmp = -1447931029, tmp))-(tmp = 1761027889, tmp))))^x)%(((tmp = 830969811, tmp)|x)|((-1102267929)-(3193018687)))));
+  assertEquals(-0.0000028559857417864914, x /= (-2966401364));
+  assertEquals(0, x >>= x);
+  assertEquals(-701800392, x += (tmp = -701800392, tmp));
+  assertEquals(2034756873, x -= (tmp = -2736557265, tmp));
+  assertEquals(-0.9475075048394501, x /= (((((82879340.27231383)+((tmp = -2876678920.653639, tmp)*(-2801097850)))<<x)>>>((x<<(((((x|x)&(tmp = -1572694766, tmp))>>(x+(x/((x-(((tmp = 1435301275, tmp)|(tmp = 983577854.212041, tmp))>>(tmp = 632633852.1644179, tmp)))+x))))>>>x)|(-850932021)))>>x))<<(-821983991)));
+  assertEquals(0, x >>= (x>>(2424003553.0883207)));
+  assertEquals(2599386349, x -= (-2599386349));
+  assertEquals(-68157441, x |= (((tmp = -1170343454.9327996, tmp)+((((tmp = 448468098, tmp)|(x>>(x>>(((x>>(((x/(x&(x<<x)))<<(2436876051.2588806))^(3010167261)))%((tmp = 2577616315.7538686, tmp)>>>(-2953152591.015912)))%((tmp = -1304628613, tmp)/(x&((x|((-2000952119)%((691146914)/((tmp = 1480966978.7766845, tmp)<<((tmp = 2644449477.392441, tmp)|(-2143869305.871568))))))+(tmp = -315254308, tmp))))))))&(-2060205555))|((-604140518.8186448)^(x*x))))%(x*((tmp = 1383244000.2807684, tmp)/(3195793656)))));
+  assertEquals(-68157441, x |= x);
+  assertEquals(-1, x >>= x);
+  assertEquals(-2147483648, x <<= x);
+  assertEquals(-1.5257198286933313, x /= (tmp = 1407521622, tmp));
+  assertEquals(1149084989.47428, x += (((tmp = 1149084991.9004865, tmp)&x)^((((((2797053000)/(x^x))*(-2829253694))>>>((tmp = -610924351, tmp)>>x))>>>(tmp = -675681012, tmp))<<(2812852729))));
+  assertEquals(0, x %= x);
+  assertEquals(0, x <<= ((tmp = -584069073, tmp)*(-2953140326)));
+  assertEquals(0, x <<= (tmp = -481515023.6404002, tmp));
+  assertEquals(-1441535370, x ^= (2853431926));
+  assertEquals(2853431926, x >>>= (((((((tmp = 2215663525.9620194, tmp)%((-1102832735.9274108)/x))>>x)&(3220898702.76322))&(((2077584946)*((x>>x)<<((tmp = 1845701049, tmp)-x)))/(tmp = 1947184202.5737212, tmp)))|(((tmp = 2976351488, tmp)^(-42517339))%((2648230244.410125)^(1520051731.31089))))/(1761635964)));
+  assertEquals(43539, x >>>= (tmp = 1361671184.7432632, tmp));
+  assertEquals(21769, x >>= ((tmp = -804932298.9572575, tmp)>>((((tmp = 1749006993.253409, tmp)+(276536978))^x)|(2698166994))));
+  assertEquals(1103025563, x |= (tmp = 1103007891, tmp));
+  assertEquals(1327594607, x += (tmp = 224569044, tmp));
+  assertEquals(1327594607, x |= x);
+  assertEquals(-478674944, x <<= (((672378508)&x)^(((-2070209708.6470091)|x)|(x>>>x))));
+  assertEquals(-478674943, x ^= ((-1832457698.6345716)>>>((tmp = -3077714019, tmp)/(1809383028))));
+  assertEquals(229129701056053250, x *= x);
+  assertEquals(1, x /= x);
+  assertEquals(2, x <<= (-1522529727));
+  assertEquals(2, x &= x);
+  assertEquals(-2016989182, x |= ((((tmp = -1267845511, tmp)*(1225350332))+((tmp = -1397690831.5717893, tmp)>>>(tmp = -2575382994, tmp)))+x));
+  assertEquals(-241, x >>= (tmp = 931869591, tmp));
+  assertEquals(-1048087547, x &= (tmp = -1048087403.1163051, tmp));
+  assertEquals(-4004486369.844599, x += (tmp = -2956398822.844599, tmp));
+  assertEquals(-4004486368.844599, x -= (((2701878498)>>x)|(x|(-1079354967))));
+  assertEquals(1, x >>= (tmp = -1583689092, tmp));
+  assertEquals(1, x *= (x>>(x%x)));
+  assertEquals(0, x %= x);
+  assertEquals(-0, x *= (-120818969));
+  assertEquals(0, x >>= ((tmp = 1794099660, tmp)/(((x&(((-321906091)^(tmp = -3009885933.8449526, tmp))&((tmp = -140917780, tmp)|(2037803173.4075825))))&x)&(tmp = -745357154, tmp))));
+  assertEquals(0, x <<= (563984257.3493614));
+  assertEquals(NaN, x %= ((((x>>(tmp = -2190891392.320677, tmp))-x)<<(462714956))<<((tmp = -84413570, tmp)|((x|(-2787022855))-((tmp = 2028532622, tmp)|(tmp = 1103757073.9178817, tmp))))));
+  assertEquals(NaN, x *= ((2137674085.3142445)|((tmp = -1054749859.2353804, tmp)%x)));
+  assertEquals(NaN, x /= (x>>>(((((tmp = 597103360.9069608, tmp)>>>(-2850217714.1866236))-((tmp = 1125150527, tmp)*x))%(tmp = -982662312, tmp))|((x/(((968656808.6069037)*(((128484784.15362918)>>x)^x))&((((x/((((tmp = 748775979, tmp)*((x-(((tmp = 709571811.9883962, tmp)%(-2083567026))%(x/(tmp = -680467505, tmp))))/((tmp = -167543858, tmp)/(tmp = -3113588783, tmp))))/x)<<(-2605415230)))>>>(tmp = 3133054172, tmp))%(tmp = -1904650393, tmp))*((x|(-1193709562))*(tmp = -1731312795.718104, tmp)))))/((tmp = -672386301, tmp)/(tmp = 808898833.4163612, tmp))))));
+  assertEquals(-9, x |= (((((tmp = 150377964.57195818, tmp)/(tmp = 2161910879.0514045, tmp))-(-2381625849))>>(-2715928517))/(((452113643)^(-2502232011))/((-3076471740)^(((tmp = 1664851172, tmp)*(((-1460011714)>>>x)<<((-2870606437)%x)))*((tmp = -2836565755.609597, tmp)-((x/(tmp = -871461415, tmp))-(2278867564))))))));
+  assertEquals(-1, x >>= x);
+  assertEquals(-1, x |= ((-1319927272)>>>(-2866709980)));
+  assertEquals(-1, x >>= ((2345179803.155703)&(-978025218.2243443)));
+  assertEquals(1, x /= x);
+  assertEquals(-260730973, x |= (tmp = -260730973, tmp));
+  assertEquals(1174405120, x <<= (2681054073));
+  assertEquals(1174405120, x &= x);
+  assertEquals(1073741824, x &= (tmp = 2017166572.7622075, tmp));
+  assertEquals(1073741824, x |= x);
+  assertEquals(168806102, x %= ((((tmp = -2939969193.950067, tmp)|((-2325174027.614815)/(-2329212715)))*(x/(((((-2927776738)/(x|x))+(x%(tmp = -3007347037.698492, tmp)))<<(-1898633380))>>(tmp = 204338085.45241892, tmp))))^x));
+  assertEquals(168806102, x %= ((-832849739.5197744)&(tmp = -141908598, tmp)));
+  assertEquals(-401033205.05225074, x -= (tmp = 569839307.0522507, tmp));
+  assertEquals(-401033205, x &= x);
+  assertEquals(-401130402, x ^= ((x*(tmp = 311418759.22436893, tmp))>>x));
+  assertEquals(793533469, x ^= (-950312893.5201888));
+  assertEquals(756, x >>>= (-1096189516));
+  assertEquals(711, x += ((tmp = -753105189, tmp)>>(599823192.5381484)));
+  assertEquals(0, x >>>= ((tmp = -2859668634.4641137, tmp)+(-1160392986.1521513)));
+  assertEquals(2427599726.176195, x -= (-2427599726.176195));
+  assertEquals(1942312465.2523103, x -= (485287260.92388475));
+  assertEquals(0, x >>>= ((tmp = -1740656456, tmp)/(tmp = 1339746799.9335847, tmp)));
+  assertEquals(0, x <<= ((-7017077.38786912)*((-699490904.4551768)^x)));
+  assertEquals(0, x <<= (tmp = 715662384, tmp));
+  assertEquals(0, x *= (x>>>(2149735450.0758677)));
+  assertEquals(NaN, x /= x);
+  assertEquals(0, x >>= ((397078885)*((851639692.8982519)-x)));
+  assertEquals(0, x &= (-2526654445));
+  assertEquals(0, x %= (-1204924598));
+  assertEquals(251639720, x ^= (x|(tmp = 251639720, tmp)));
+  assertEquals(695433573, x ^= (663539405));
+  assertEquals(-1038050104, x -= (1733483677));
+  assertEquals(0, x ^= x);
+  assertEquals(NaN, x %= x);
+  assertEquals(0, x &= (392107269));
+  assertEquals(0, x %= (-3084908458.241551));
+  assertEquals(0, x ^= x);
+  assertEquals(-2121660509, x ^= (tmp = -2121660509.7861986, tmp));
+  assertEquals(2285041855588855800, x *= (x|(3209046634)));
+  assertEquals(54915072, x >>>= (x%(((((x%((((tmp = -1429433339.5078833, tmp)|(tmp = 2906845137, tmp))^(3207260333))&(-848438650)))-(-2721099735))&(141851917.19978714))+x)/x)));
+  assertEquals(54915072, x &= x);
+  assertEquals(54915072, x %= (x+(1855489160)));
+  assertEquals(70078753, x ^= ((((((-1648661736)+(x%((-1421237596)+(tmp = 2053180992.3857927, tmp))))+(tmp = 38606889, tmp))<<((-241334284)%((x>>(215316122))*(tmp = 396488307, tmp))))+((tmp = -2900704565, tmp)^x))^(((1103481003.1111188)^x)-(tmp = 1304113534, tmp))));
+  assertEquals(1149501440, x <<= ((x>>(tmp = 3203172843, tmp))*(tmp = -192535531, tmp)));
+  assertEquals(0, x ^= x);
+  assertEquals(0, x >>= ((tmp = 2751499787, tmp)&((tmp = 2217654798, tmp)*(tmp = -2798728014, tmp))));
+  assertEquals(NaN, x /= ((((-2019592425)>>>((((-1571930240.741224)>>>((-183952981)/((((1990518443.672842)>>(((((2051371284)%(685322833.6793983))>>>(2662885938))<<(-1212029669.6675105))|((-2790877875)<<(1546643473))))<<x)-(tmp = 804296674.4579233, tmp))))-(tmp = -417759051.68770766, tmp))/((-621859758)>>>x)))&x)<<(tmp = -48558935.55320549, tmp)));
+  assertEquals(0, x <<= (x&x));
+  assertEquals(0, x *= (x%(tmp = 301196068, tmp)));
+  assertEquals(398290944, x |= (((tmp = 1904146839, tmp)+(1521017178))*(-3174245888.562067)));
+  assertEquals(1256401076, x ^= (1566464180));
+  assertEquals(149620758, x %= ((tmp = 532626355, tmp)^(tmp = -382971203, tmp)));
+  assertEquals(149620791, x |= (x>>x));
+  assertEquals(-0.07034576194938641, x /= ((tmp = -1977313182.7573922, tmp)-x));
+  assertEquals(0, x <<= x);
+  assertEquals(0, x &= x);
+  assertEquals(0, x /= ((2182424851.139966)%(((-2768516150)+x)>>>x)));
+  assertEquals(0, x %= (-504299638.53962016));
+  assertEquals(-0, x *= (-2915134629.6909094));
+  assertEquals(0, x <<= ((tmp = 952692723.402582, tmp)%(2146335996.785011)));
+  assertEquals(230457472, x |= ((tmp = -574776101.8681948, tmp)*(683185125)));
+  assertEquals(933795934, x ^= (tmp = 974395614, tmp));
+  assertEquals(933801974, x ^= (x>>>((-148683729)*(((tmp = 2912596991.415531, tmp)^(-2883672328))/x))));
+  assertEquals(222, x >>= (-3060224682));
+  assertEquals(27, x >>>= (1429156099.1338701));
+  assertEquals(754519106, x ^= (tmp = 754519129.7281355, tmp));
+  assertEquals(188629776, x >>>= ((x>>>((1247267193)<<(tmp = -936228622, tmp)))%((tmp = 978604324.8236886, tmp)*((tmp = -3018953108, tmp)^(((tmp = 259650195, tmp)>>>(tmp = 2762928902.7901163, tmp))*(x>>((tmp = 787444263.5542864, tmp)/(x>>>(((-2039193776)<<(tmp = -1408159169, tmp))-(1238893783))))))))));
+  assertEquals(188629775.33987066, x += ((tmp = 1040520414, tmp)/((-1576237184)|((tmp = -970083705, tmp)&(((tmp = -312062761.12228274, tmp)|(1171754278.2968853))<<(-2069846597.7723892))))));
+  assertEquals(1473670, x >>>= ((tmp = 202409672, tmp)^x));
+  assertEquals(2171703268900, x *= (x>>(((tmp = 840468550, tmp)&(-3208057101.2136793))/x)));
+  assertEquals(0, x ^= x);
+  assertEquals(0, x ^= (x&((tmp = 2569871408.2405066, tmp)|((tmp = -3149374622, tmp)<<(x-(x|((tmp = -821239139.1626894, tmp)>>>x)))))));
+  assertEquals(NaN, x /= x);
+  assertEquals(NaN, x %= (tmp = 1926106354, tmp));
+  assertEquals(0, x >>= ((x/(-2848416))/(tmp = 2484293767, tmp)));
+  assertEquals(0, x <<= ((tmp = -2484137114, tmp)>>>(tmp = -887083772.8318355, tmp)));
+  assertEquals(0, x >>= (tmp = -2651389432, tmp));
+  assertEquals(0, x ^= x);
+  assertEquals(1041871201, x += ((tmp = 1041871201.9272791, tmp)|(x<<(-1136959830))));
+  assertEquals(651390879501530900, x *= ((tmp = 1250424964.0346212, tmp)>>x));
+  assertEquals(1965815296.245636, x %= ((2650603245.655831)+((-1610821947.8640454)>>>(((878987151.6917406)*((((784630543)%(((1448720244)>>(((tmp = 3036767847, tmp)+((tmp = 1012548422, tmp)<<(1957000200)))-x))/(x>>x)))<<((tmp = 914710268, tmp)*(((x^(1559603121))<<(tmp = 3181816736, tmp))|((-1964115655)+x))))-(-1055603890)))&(946797797.0616649)))));
+  assertEquals(1965815296.245636, x %= (tmp = -2601038357.593118, tmp));
+  assertEquals(-769384440.872302, x += (-2735199737.117938));
+  assertEquals(-769384440.872302, x %= (2193123162));
+  assertEquals(1, x /= x);
+  assertEquals(1, x -= (((x>>>(-1968465925))*((tmp = 563037904, tmp)>>((tmp = 3009534415.769578, tmp)>>((-2567240601.7038674)<<(tmp = -1258402723.4150183, tmp)))))%(3112239470.276867)));
+  assertEquals(1, x |= x);
+  assertEquals(1505461527, x ^= (tmp = 1505461526.5858076, tmp));
+  assertEquals(406553877, x &= (tmp = 2558242293, tmp));
+  assertEquals(406553877, x |= x);
+  assertEquals(-574902339, x |= ((-709809495)%(tmp = -2880884811.410611, tmp)));
+  assertEquals(-20281777.349363208, x %= (22184822.46602547));
+  assertEquals(1, x /= x);
+  assertEquals(-4360732, x ^= ((x|(tmp = 3178620274, tmp))>>(((2686286888)&(((-1107223053.8716578)/(((-2955575332.3675404)+(-2770518721))|(-2705016953.640522)))-x))^((1473641110.4633303)*((((-1466496401)<<x)+x)%(1805868749.082736))))));
+  assertEquals(-1158545408, x <<= ((((x/((-2710098221.691819)-(-2421462965.788145)))/(((((x>>>(tmp = 1994541591.1032422, tmp))+(tmp = -1276676679.9747126, tmp))&((tmp = 1764029634.2493339, tmp)+((x|(tmp = -3050446156, tmp))-((tmp = -9441859, tmp)/(((-2072420232)&x)*(-1003199889))))))+(tmp = -2443230628, tmp))*x))*((x&((((x|(747566933))*(((2039741506)>>>((tmp = -2456000554, tmp)>>>(-1566360933.7788877)))^((tmp = 960600745, tmp)/x)))&(x^(((-2649310348.777452)^((2224282875)-(tmp = -2129141087.3182096, tmp)))<<((x<<x)+((-1307892509.3874407)-(x|(tmp = -2831643528.9720087, tmp)))))))/(((tmp = -35502946, tmp)<<((tmp = 1091279222, tmp)>>(((-2686069468.8930416)-x)+(tmp = 367442353.2904701, tmp))))%(1218262628))))/x))^(-919079153.7857773)));
+  assertEquals(747, x >>>= (1229157974));
+  assertEquals(747, x |= x);
+  assertEquals(NaN, x %= (((3086718766.4715977)*((7912648.497568846)*((-2713828337.1659327)*(-176492425.4011252))))<<(tmp = -1074475173, tmp)));
+  assertEquals(0, x >>>= ((((444923201)<<x)>>>(-883391420.2142565))*((((617245412)<<x)>>>x)*(-913086143.2793813))));
+  assertEquals(1941802406, x ^= (tmp = -2353164890, tmp));
+  assertEquals(14, x >>>= (-1600311077.4571416));
+  assertEquals(-18229482703.7246, x += (((x+(-993157139.7880647))%x)*(1862419512.1781366)));
+  assertEquals(-14.531388114858734, x /= ((tmp = -1649072797.951641, tmp)<<x));
+  assertEquals(0, x ^= x);
+  assertEquals(0, x >>= ((x/x)^x));
+  assertEquals(2, x ^= ((-1597416259)/(-738770020)));
+  assertEquals(0, x >>= (tmp = -387850072.74833393, tmp));
+  assertEquals(0, x >>>= ((2491085477.186817)>>(x*(((tmp = -1592498533, tmp)+(tmp = 2086841852, tmp))&(-3174019330.8288536)))));
+  assertEquals(0, x >>= x);
+  assertEquals(0, x >>>= (tmp = -3045348659.45243, tmp));
+  assertEquals(-1208573479, x |= ((3086393817)-x));
+  assertEquals(1460649854142163500, x *= x);
+  assertEquals(1588199424, x <<= (-1902076952));
+  assertEquals(1586102272, x &= (tmp = 2139876091.9142454, tmp));
+  assertEquals(-460908552.5528109, x -= (tmp = 2047010824.552811, tmp));
+  assertEquals(-460908552.5528109, x %= (tmp = 507904117.09368753, tmp));
+  assertEquals(-460908552.5528109, x %= (2749577642.527038));
+  assertEquals(234012, x >>>= (-340465746.91275));
+  assertEquals(0, x >>>= x);
+  assertEquals(0, x %= (tmp = -2601875531, tmp));
+  assertEquals(0, x %= (x|(tmp = 650979981.1158671, tmp)));
+  assertEquals(0, x %= (tmp = -2286020987, tmp));
+  assertEquals(0, x |= x);
+  assertEquals(0, x &= (x|((tmp = 2568101411, tmp)-(-1438002403))));
+  assertEquals(0, x >>>= (1399248574));
+  assertEquals(0, x %= (-1906670287.2043698));
+  assertEquals(0, x >>= (1019286379.6962404));
+  assertEquals(0, x |= (x/(tmp = -82583591.62643051, tmp)));
+  assertEquals(NaN, x %= x);
+  assertEquals(NaN, x *= (x^(1874776436)));
+  assertEquals(NaN, x -= ((-1238826797)-(-2971588236.7228813)));
+  assertEquals(0, x <<= (2064632559));
+  assertEquals(-0.5967273958864694, x += (((tmp = 1502995019, tmp)>>x)/(-2518729707)));
+  assertEquals(0, x >>>= x);
+  assertEquals(-0, x /= (-1923030890));
+  assertEquals(NaN, x %= x);
+  assertEquals(0, x >>= (tmp = 1081732779.9449487, tmp));
+  assertEquals(-820183066, x |= ((tmp = -3169007292.4721155, tmp)|(-1912588318)));
+  assertEquals(0, x -= x);
+  assertEquals(NaN, x %= x);
+  assertEquals(NaN, x /= (tmp = 287181840, tmp));
+  assertEquals(0, x &= (x/((tmp = -1139766051, tmp)<<(x&(tmp = 2779004578, tmp)))));
+  assertEquals(0, x >>= (((tmp = -1816938028, tmp)+(-224851993.3139863))*(-2933829524)));
+  assertEquals(0, x |= ((((tmp = 305077929.1808746, tmp)&((x-(((((tmp = 2122810346.7475111, tmp)<<(717271979))*(tmp = 256854043.72633624, tmp))%((x+(tmp = -318657223.9992106, tmp))*((1993144830)<<(2594890698.603228))))^((((tmp = 257370667, tmp)>>>((((x^(3160746820))>>>(2049640466.8116226))>>>(2543930504.7117066))^(x-x)))^(x%(964838975)))^x)))%(x*x)))>>>x)*(tmp = -46861540, tmp)));
+  assertEquals(747575633, x ^= ((-2406502427)-(-3154078060.3794584)));
+  assertEquals(0, x *= (x%x));
+  assertEquals(0, x <<= (1313773705.3087234));
+  assertEquals(0, x >>>= ((x+x)>>>(3068164056)));
+  assertEquals(-0, x *= (tmp = -1771797797, tmp));
+  assertEquals(1784146970, x ^= (tmp = 1784146970, tmp));
+  assertEquals(1784146970, x >>>= (tmp = -2219972320.7195597, tmp));
+  assertEquals(1744830464, x <<= ((((-2769476584)-(((1798431604)>>(tmp = 1337687914.799577, tmp))>>>((-2802941943.15014)>>x)))>>>(tmp = 646033678, tmp))-x));
+  assertEquals(3044433348102455300, x *= x);
+  assertEquals(0, x >>= ((tmp = 1592076570.1900845, tmp)-((645774223.6317859)>>x)));
+  assertEquals(0, x >>= (x>>>(-3045822290.1536255)));
+  assertEquals(-0, x *= (tmp = -2450298800.986624, tmp));
+  assertEquals(0, x >>= (tmp = 1379605393, tmp));
+  assertEquals(0, x &= (((x-((((tmp = 837939461.6683749, tmp)+((((-813261853.3247359)|(x&(((-2565113940)*(tmp = -2725085381.240134, tmp))|x)))%(-1457259320))-(x+((tmp = -273947066, tmp)%((1164825698.879649)>>(1653138880.3434052))))))>>>(2823967606.411492))>>>((((((((1189235604.9646997)/(tmp = -2875620103.4002438, tmp))-(tmp = -801261493, tmp))<<(((1832556579.5095325)<<x)|((tmp = -2740330665, tmp)>>(tmp = -2352814025, tmp))))-(tmp = -1445043552.99499, tmp))&(x<<(((((445325471)*(1293047043.1808558))>>>(((1901837408.5910044)-(tmp = -2349093446.5313253, tmp))>>>(tmp = 1000847053.1861948, tmp)))*(x>>>(1771853406.6567078)))>>x)))>>>x)>>>(x^((tmp = 2813422715, tmp)-(x+(-342599947)))))))&(x>>>x))*x));
+  assertEquals(NaN, x %= ((tmp = -3027713526, tmp)-((((x%(((((x/((2711155710)^(((((x>>>x)%((1098599291.155015)^(((((tmp = 1855724377.8987885, tmp)/(x|x))*((-1963179786)*((x-((-1634717702)%x))<<x)))>>(2008859507))>>((tmp = 2635024299.7983694, tmp)^(tmp = -602049246, tmp)))))*(x>>x))&(tmp = -1925103609, tmp))*((tmp = 2106913531.2828505, tmp)%((tmp = -200970069, tmp)*(-2809001910.951446))))))%x)*((1990098169)>>((x<<(2303347904.2601404))%x)))|(2767962065.9846206))+(201589933.301661)))>>(((tmp = 1921071149.5140274, tmp)>>(1054558799.1731887))|x))*(x/((((-2833879637.345674)>>>(tmp = 2849099601, tmp))%x)+(x%(x%(((tmp = 1983018049, tmp)^(tmp = -2659637454, tmp))>>((-1335497229.6945198)-(x+(((((tmp = 1136612609.848967, tmp)%(2471741030.01762))<<(x|(((tmp = 1644081190.1972675, tmp)&(-1422527338))^(2379264356.265957))))/(tmp = 2979299484.1884174, tmp))/x)))))))))*((tmp = 1858298882, tmp)^((tmp = -547417134.9651439, tmp)*x)))));
+  assertEquals(-7664, x |= ((2286000258.825538)>>(1716389170)));
+  assertEquals(-1, x >>= x);
+  assertEquals(-1231640486.3023372, x += ((tmp = 1231640485.3023372, tmp)*x));
+  assertEquals(-2463280972.6046743, x += x);
+  assertEquals(1746, x >>>= x);
+  assertEquals(1746, x >>>= (((tmp = -562546488.0669937, tmp)*((-2475357745.8508205)&((x%(821425388.8633704))%((((-2315481592.687686)&(((tmp = 3130530521.7453523, tmp)+x)-x))^(-973033390.1773088))/x))))<<x));
+  assertEquals(1746, x %= (-1544973951.076033));
+  assertEquals(27936, x <<= (-525441532.33816123));
+  assertEquals(27936, x %= (x*((tmp = 344991423.5336287, tmp)+(-2267207281))));
+  assertEquals(27, x >>>= (tmp = 1249792906, tmp));
+  assertEquals(0, x >>>= (tmp = -1068989615, tmp));
+  assertEquals(0, x >>>= (tmp = 347969658.92579734, tmp));
+  assertEquals(-2656611892, x -= (2656611892));
+  assertEquals(1944539596, x |= (((tmp = 3000889963, tmp)-x)<<((tmp = 2917390580.5323124, tmp)^(-996041439))));
+  assertEquals(1944539596, x |= x);
+  assertEquals(-739740167.0752468, x -= ((1712009965.0752468)+(x>>((tmp = -740611560.99014, tmp)>>>((tmp = -1033267419.6253037, tmp)&(862184116.3583733))))));
+  assertEquals(-1479480334.1504936, x += x);
+  assertEquals(-4294967296.150494, x -= (x>>>((1219235492.3661718)&(3138970355.0665245))));
+  assertEquals(0, x >>= (x*x));
+  assertEquals(-0, x *= ((-2202530054.6558375)-(-676578695)));
+  assertEquals(-0, x %= (1336025846));
+  assertEquals(0, x &= x);
+  assertEquals(0, x /= (1759366510));
+  assertEquals(630007622, x |= (630007622));
+  assertEquals(-0.22460286863455903, x /= (tmp = -2804984753, tmp));
+  assertEquals(1102410276.775397, x -= (-1102410277));
+  assertEquals(1102410276.775397, x %= ((((-2569525203)&x)*(x|(-1932675298)))/((-2376634450)>>>(x>>>(tmp = 936937604.9491489, tmp)))));
+  assertEquals(33642, x >>= (3028252527));
+  assertEquals(2181106522.688034, x -= (-2181072880.688034));
+  assertEquals(-2113861630, x &= (2523921542));
+  assertEquals(-2147483646, x &= (-1996601566.9370148));
+  assertEquals(-2147483648, x &= (tmp = -665669175.1968856, tmp));
+  assertEquals(-2858673260.1367273, x -= (tmp = 711189612.1367272, tmp));
+  assertEquals(350657, x >>= (tmp = -170243892.25474262, tmp));
+  assertEquals(-0.0001405571562140975, x /= (-2494764474.7868776));
+  assertEquals(0, x ^= x);
+  assertEquals(NaN, x /= ((x&(-2041236879))*((tmp = -2182530229, tmp)^((1274197078)*x))));
+  assertEquals(0, x |= (x&(x-(1794950303))));
+  assertEquals(1222105379, x |= (tmp = 1222105379, tmp));
+  assertEquals(729884484, x ^= (tmp = 1666645607.6907792, tmp));
+  assertEquals(729884484, x %= (tmp = -2896922082, tmp));
+  assertEquals(8768, x &= ((tmp = 358940932, tmp)>>>(3159687631.3308897)));
+  assertEquals(1892384495, x |= (-2402591569));
+  assertEquals(1892470533, x += ((((x^(-2266612043))>>>(tmp = -531009952, tmp))<<(x>>>((-1365315963.5698428)>>>((x+((-3168207800.184341)-(tmp = 1776222157.609917, tmp)))+(-1588857469.3596382)))))>>>x));
+  assertEquals(143587205, x += (tmp = -1748883328, tmp));
+  assertEquals(0, x ^= x);
+  assertEquals(0, x >>= (tmp = 2334880462.3195543, tmp));
+  assertEquals(0, x &= ((tmp = 1819359625.4396145, tmp)|(tmp = -1323513565, tmp)));
+  assertEquals(-1102259874, x ^= (3192707422));
+  assertEquals(2567457772588852700, x *= (-2329267202));
+  assertEquals(-16783687, x |= ((-2212476227.060922)^(378973700.78452563)));
+  assertEquals(4278183609, x >>>= ((((((((tmp = 1766363150.197206, tmp)*(-2774552871))%x)>>>((3071429820)&((((((tmp = 351068445.27642524, tmp)<<(tmp = 2646575765, tmp))^(806452682))<<((x>>>(-2217968415.505327))<<(1564726716)))|x)-(tmp = -3110814468.9023848, tmp))))+x)^x)>>>(tmp = -617705282.0788529, tmp))>>>x));
+  assertEquals(4314933530, x -= ((1032195469.789219)|(tmp = -448053861.9531791, tmp)));
+  assertEquals(9709850, x %= (((tmp = -3056286252.5853324, tmp)*x)&x));
+  assertEquals(9709850, x %= (tmp = -2596800940, tmp));
+  assertEquals(2655489828.9461126, x -= (tmp = -2645779978.9461126, tmp));
+  assertEquals(369266212, x &= (((335712316.24874604)|(tmp = 33648215, tmp))-((x/(2639848695))<<((-499681175)<<(-2490554556)))));
+  assertEquals(-2147483648, x <<= (-834465507));
+  assertEquals(1073741824, x >>>= (((tmp = 3018385473.1824775, tmp)>>(x*(-2574502558.216812)))|(((tmp = -1742844828, tmp)*(1698724455))&x)));
+  assertEquals(-270818218, x += (-1344560042));
+  assertEquals(360710144, x <<= x);
+  assertEquals(0, x <<= (tmp = 612718075, tmp));
+  assertEquals(0, x <<= x);
+  assertEquals(-0, x /= (tmp = -1922423684, tmp));
+  assertEquals(-0, x *= ((((tmp = 741806213.3264687, tmp)%(-711184803.2022421))+((tmp = -3209040938, tmp)&(525355849.044886)))&(x<<(tmp = -698610297, tmp))));
+  assertEquals(0, x <<= (-482471790));
+  assertEquals(0, x &= ((-921538707)/(tmp = -482498765.988616, tmp)));
+  assertEquals(0, x ^= (x^x));
+  assertEquals(-351721702, x ^= (-351721702.8850286));
+  assertEquals(726242219625599900, x -= ((2064820612)*x));
+  assertEquals(1452484439251199700, x += x);
+  assertEquals(2.52318299412847e-15, x %= ((((x<<((2508143285)+x))>>(-2493225905.011774))%(1867009511.0792103))/((((x<<(2542171236))>>((x|x)&(tmp = -384528563, tmp)))+((-1168755343)*(1731980691.6745195)))+(tmp = -1608066022.71164, tmp))));
+  assertEquals(79905008, x += ((((-2702081714.590131)&(x+(tmp = -1254725471.2121565, tmp)))*(3088309981))%(((tmp = 1476844981.1453142, tmp)|((((tmp = -1243556934.7291331, tmp)%x)^(-1302096154))+((660489180)/(tmp = -681535480.8642154, tmp))))^(tmp = -8410710, tmp))));
+  assertEquals(1215822204, x ^= ((-3008054900)>>>(tmp = -1990206464.460693, tmp)));
+  assertEquals(-394790532, x |= ((((-1334779133.2038574)+(tmp = -1407958866.832946, tmp))<<(1699208315))-(((x^(x%x))<<(3216443))>>(x+((((2576716374.3081336)|((tmp = 2316167191.348064, tmp)&((51086351.20208645)&((x|(tmp = -357261999, tmp))^(x/x)))))*(-45901631.10155654))*(((-439588079)>>>((-2358959768.7634916)|(1613636894.9373643)))+(((-908627176)<<x)%(x%((-1669567978)>>>((x>>(1289400876))+(tmp = 2726174270, tmp)))))))))));
+  assertEquals(-0.17717467607696327, x /= (2228255982.974148));
+  assertEquals(-1905616474, x ^= (tmp = 2389350822.851587, tmp));
+  assertEquals(-0, x %= x);
+  assertEquals(2818124981.508915, x -= (-2818124981.508915));
+  assertEquals(-1476842315, x |= x);
+  assertEquals(73408564, x &= (-3147390604.3453345));
+  assertEquals(70, x >>>= x);
+  assertEquals(1, x >>= x);
+  assertEquals(3086527319.899181, x *= (3086527319.899181));
+  assertEquals(-145, x >>= x);
+  assertEquals(-145, x %= (tmp = -2500421077.3982406, tmp));
+  assertEquals(-1, x >>= (tmp = -2970678326.712191, tmp));
+  assertEquals(-1, x %= ((tmp = -535932632.4668834, tmp)+(((-1226598339.347982)<<((tmp = 616949449, tmp)/(tmp = 2779464046, tmp)))/(214578501.67984307))));
+  assertEquals(1, x *= x);
+  assertEquals(1, x >>= ((tmp = 11080208, tmp)<<(460763913)));
+  assertEquals(-1.8406600706723492e-19, x /= ((tmp = -2334126306.1720915, tmp)*(tmp = 2327566272.5901165, tmp)));
+  assertEquals(856681434186007200, x -= ((tmp = -2286974992.8133907, tmp)*(374591518)));
+  assertEquals(3126084224, x >>>= x);
+  assertEquals(-1160460669, x |= (tmp = 181716099, tmp));
+  assertEquals(873988096, x <<= (tmp = 406702419, tmp));
+  assertEquals(0, x <<= ((tmp = 802107965.4672925, tmp)-((tmp = 1644174603, tmp)>>((tmp = 604679952, tmp)+(tmp = -515450096.51425123, tmp)))));
+  assertEquals(NaN, x %= ((x>>(tmp = 2245570378, tmp))*(tmp = 1547616585, tmp)));
+  assertEquals(NaN, x /= ((tmp = -776657947.0382309, tmp)&(tmp = 163929332.28270507, tmp)));
+  assertEquals(NaN, x *= (tmp = 243725679.78916526, tmp));
+  assertEquals(NaN, x /= (x>>x));
+  assertEquals(0, x <<= ((tmp = -1293291295.5735884, tmp)%(((((63309078)>>>x)&(x&(-2835108260.025297)))+x)>>>(-1317213424))));
+  assertEquals(0, x *= ((((tmp = -1140319441.0068483, tmp)*(tmp = 2102496185, tmp))&(-2326380427))<<(tmp = -2765904696, tmp)));
+  assertEquals(0, x /= (tmp = 2709618593, tmp));
+  assertEquals(0, x >>= (-1753085095.7670164));
+  assertEquals(1766381484, x |= (-2528585812));
+  assertEquals(1766381484, x %= (2735943476.6363373));
+  assertEquals(1766381484, x %= (x*(tmp = 2701354268, tmp)));
+  assertEquals(-2147483648, x <<= (-323840707.4949653));
+  assertEquals(4611686018427388000, x *= (x<<x));
+  assertEquals(0, x <<= (3066735113));
+  assertEquals(0, x ^= ((((x*x)^(tmp = -2182795086.39927, tmp))<<(x^(tmp = 1661144992.4371827, tmp)))<<((((-2885512572.176741)*(tmp = 609919485, tmp))|(tmp = 929399391.0790694, tmp))>>>((((((((((399048996)>>((-107976581.61751771)>>>x))|(((-1502100015)<<(tmp = -1108852531.9494338, tmp))&(x/(tmp = -3198795871.7239237, tmp))))+((-2627653357)>>x))>>>x)*(1066736757.2718519))%(tmp = 1326732482.201604, tmp))/(tmp = 2513496019.814191, tmp))>>>((1694891519)>>>(-2860217254.378931)))<<(tmp = 31345503, tmp)))));
+  assertEquals(0, x ^= (x/((-2556481161)>>>(x/(x%(x&(1302923615.7148068)))))));
+  assertEquals(NaN, x /= x);
+  assertEquals(NaN, x += (tmp = 846522031, tmp));
+  assertEquals(0, x >>= (x+(-1420249556.419045)));
+  assertEquals(0, x ^= (((x%(-1807673170))&x)-x));
+  assertEquals(-3484.311990686845, x -= ((((((-510347602.0068991)>>>x)<<((tmp = 1647999950, tmp)&(((305407727)>>((1781066601.791009)&x))<<((tmp = -998795238, tmp)%(((x/x)+x)<<(((2586995491.434947)<<x)-((((tmp = 545715607.9395425, tmp)*x)>>>x)>>>(((((2332534960.4595165)^(-3159493972.3695474))<<(tmp = 867030294, tmp))|(2950723135.753855))^(((3150916666)<<x)>>((tmp = 414988690, tmp)|((tmp = -1879594606, tmp)/(tmp = 1485647336.933429, tmp))))))))))))>>(tmp = -2676293177, tmp))%(617312699.1995015))/((((tmp = -1742121185, tmp)^((((x&x)<<(tmp = 698266916, tmp))/(-1860886248))+((-213304430)%((((((-2508973021.1333447)+(tmp = 2678876318.4903, tmp))&(tmp = -43584540, tmp))-x)^(-2251323850.4611115))-x))))>>>(tmp = 2555971284, tmp))%((((tmp = 16925106, tmp)^x)&x)|((x/((x|(tmp = -2787677257.125139, tmp))<<(-853699567)))+(tmp = -1721553520, tmp))))));
+  assertEquals(-447873933.26863855, x += (-447870448.9566479));
+  assertEquals(200591060101520900, x *= x);
+  assertEquals(200591062202483420, x -= (-2100962536));
+  assertEquals(-5.261023346568228e+24, x *= ((tmp = -419641692.6377077, tmp)>>(tmp = -224703100, tmp)));
+  assertEquals(1269498660, x |= (195756836));
+  assertEquals(1269498660, x |= x);
+  assertEquals(1269498660, x |= x);
+  assertEquals(-37.75978948486164, x /= (((tmp = -595793780, tmp)+((tmp = 2384365752, tmp)>>>(1597707155)))|((968887032)^(tmp = 2417905313.4337964, tmp))));
+  assertEquals(-37.75978948486164, x %= (tmp = -1846958365.291661, tmp));
+  assertEquals(1102319266.6421175, x += (1102319304.401907));
+  assertEquals(-1664202255175155200, x -= ((x^(tmp = 407408729, tmp))*x));
+  assertEquals(-752874653, x ^= (tmp = 314673507, tmp));
+  assertEquals(-72474761, x |= (tmp = -2538726025.8884344, tmp));
+  assertEquals(-72474761, x |= x);
+  assertEquals(-122849418, x += ((tmp = -2332080457, tmp)|(((((30496388.145492196)*(((-1654329438.451212)|(-2205923896))&(x>>(tmp = -1179784444.957002, tmp))))&(tmp = 319312118, tmp))*(651650825))|(((-2305190283)|x)>>>(-428229803)))));
+  assertEquals(994, x >>>= x);
+  assertEquals(614292, x *= (((((2565736877)/((tmp = 649009094, tmp)>>>(((x>>>(2208471260))>>(x>>>x))%x)))&(tmp = 357846438, tmp))<<(tmp = -2175355851, tmp))%x));
+  assertEquals(1792008118, x |= (tmp = 1791924774.5121183, tmp));
+  assertEquals(1246238208, x &= (tmp = 1264064009.9569638, tmp));
+  assertEquals(-88877082, x ^= (2969289190.285704));
+  assertEquals(0.044923746573582474, x /= ((tmp = -3057438043, tmp)^(-1009304907)));
+  assertEquals(0, x <<= ((-828383918)-((((x>>(734512101))*(tmp = -3108890379, tmp))-(x|((tmp = 3081370585.3127823, tmp)^((-271087194)-(x/(tmp = -2777995324.4073873, tmp))))))%x)));
+  assertEquals(1604111507.3365753, x -= (-1604111507.3365753));
+  assertEquals(-1721314970, x ^= (tmp = -956686859, tmp));
+  assertEquals(-102247425, x |= (tmp = -2535095555, tmp));
+  assertEquals(-102247425, x %= (-955423877));
+  assertEquals(1053144489850425, x *= (((tmp = 1583243590.9550207, tmp)&(1356978114.8592746))|(tmp = -10299961.622774363, tmp)));
+  assertEquals(-0.0043728190668037336, x /= ((-1196259252.435701)*(((-689529982)|(tmp = -1698518652.4373918, tmp))<<x)));
+  assertEquals(-2, x ^= (((x+(tmp = 2961627388, tmp))>>(tmp = 231666110.84104693, tmp))|x));
+  assertEquals(-1, x >>= (tmp = -83214419.92958307, tmp));
+  assertEquals(-1, x %= (-1303878209.6288595));
+  assertEquals(2944850457.5213213, x -= (tmp = -2944850458.5213213, tmp));
+  assertEquals(-1.6607884436053055, x /= (-1773164107));
+  assertEquals(-0.6607884436053055, x %= ((x>>(1240245489.8629928))%(tmp = -3044136221, tmp)));
+  assertEquals(-0, x *= ((x*x)>>>((1069542313.7656753)+x)));
+  assertEquals(0, x >>>= (tmp = -202931587.00212693, tmp));
+  assertEquals(-0, x *= (-375274420));
+  assertEquals(0, x |= ((x/(((tmp = -876417141, tmp)*(x>>>x))&(-2406962078)))<<x));
+  assertEquals(0, x &= ((tmp = -650283599.0780096, tmp)*(tmp = 513255913.34108484, tmp)));
+  assertEquals(3027255453.458466, x += (3027255453.458466));
+  assertEquals(-12568623413253943000, x *= (((x-(198689694.92141533))|x)-x));
+  assertEquals(-12568623410285185000, x -= (tmp = -2968758030.3694654, tmp));
+  assertEquals(-2008903680, x &= (3111621747.7679076));
+  assertEquals(-110045263.26583672, x += (tmp = 1898858416.7341633, tmp));
+  assertEquals(15964, x >>>= (1141042034));
+  assertEquals(31928, x += x);
+  assertEquals(0, x ^= x);
+  assertEquals(-1159866377, x |= (-1159866377));
+  assertEquals(0, x ^= x);
+  assertEquals(3072699529.4306993, x -= (tmp = -3072699529.4306993, tmp));
+  assertEquals(1, x /= x);
+  assertEquals(-1471195029, x |= (2823772267.429641));
+  assertEquals(-4152937108, x += (-2681742079));
+  assertEquals(142030188, x |= x);
+  assertEquals(270, x >>= (tmp = 1013826483, tmp));
+  assertEquals(0, x >>>= (529670686));
+  assertEquals(-2912300367, x -= (2912300367));
+  assertEquals(2213791134963007500, x *= (x<<((((-3214746140)>>(tmp = -588929463, tmp))+((tmp = -3084290306, tmp)>>x))>>x)));
+  assertEquals(2213791133466809900, x -= (tmp = 1496197641, tmp));
+  assertEquals(69834416, x >>>= (x|(((2755815509.6323137)^(x%(((x*((((tmp = 375453453, tmp)<<(x*x))>>(tmp = -973199642, tmp))*x))>>((tmp = -356288629, tmp)>>(tmp = 2879464644, tmp)))<<((((1353647167.9291127)>>>(x/x))<<((2919449101)/(2954998123.5529594)))^x))))&((-2317273650)>>>(tmp = 34560010.71060455, tmp)))));
+  assertEquals(69834416, x >>>= (x^(-2117657680.8646245)));
+  assertEquals(2217318064, x -= ((tmp = 2035883891, tmp)<<(tmp = -1884739265, tmp)));
+  assertEquals(-1272875686, x ^= (tmp = 805889002.7165648, tmp));
+  assertEquals(-1272875686, x >>= (x&(((1750455903)*x)>>((722098015)%((tmp = 1605335626, tmp)>>(tmp = -565369634, tmp))))));
+  assertEquals(-1274351316, x -= (x>>>((tmp = 2382002632, tmp)-((tmp = -2355012843, tmp)+(1465018311.6735773)))));
+  assertEquals(-2982908522.4418216, x -= ((tmp = 1635549038.4418216, tmp)+(((1952167017.720186)&((tmp = -2284822073.1002254, tmp)>>(-1403893917)))%(tmp = 655347757, tmp))));
+  assertEquals(312, x >>>= x);
+  assertEquals(1248, x <<= (2376583906));
+  assertEquals(0, x ^= x);
+  assertEquals(0, x *= ((((tmp = 1914053541.881434, tmp)>>>(tmp = 1583032186, tmp))>>>(-2511688231))%(tmp = -2647173031, tmp)));
+  assertEquals(0, x >>>= (tmp = -2320612994.2421227, tmp));
+  assertEquals(0, x %= (((x+(tmp = -720216298.5403998, tmp))<<(414712685))>>(tmp = 480416588, tmp)));
+  assertEquals(0, x >>= ((((3039442014.271272)<<x)%(-2402430612.9724464))&((-2141451461.3664773)%((x>>(1361764256))/((tmp = -1723952801.9320493, tmp)%(477351810.2485285))))));
+  assertEquals(-0, x /= (tmp = -1627035877, tmp));
+  assertEquals(0, x >>>= (tmp = 1745193212, tmp));
+  assertEquals(0, x >>>= (2309131575));
+  assertEquals(NaN, x %= (((x*(tmp = -1730907131.6124666, tmp))%((((1481750041)|(x>>((((x>>>(tmp = 3128156522.5936565, tmp))/(tmp = -1277222645.9880452, tmp))^(tmp = -2327254789, tmp))+x)))>>>(-1161176960))>>>(tmp = 3135906272.5466847, tmp)))*(((((-2230902834.464362)^(1822893689.8183987))+(((tmp = 1597326356, tmp)/(x&((tmp = -3044163063.587389, tmp)>>(tmp = 2844997555, tmp))))%(x^x)))>>((x|x)/x))^(2634614167.2529745))));
+  assertEquals(0, x &= (3081901595));
+  assertEquals(0, x &= (-2453019214.8914948));
+  assertEquals(0, x &= x);
+  assertEquals(0, x >>>= (-596810618.3666217));
+  assertEquals(0, x >>= (((908276623)|x)/x));
+  assertEquals(0, x ^= x);
+  assertEquals(958890056, x |= (tmp = 958890056.474458, tmp));
+  assertEquals(1325436928, x <<= (tmp = -2474326583, tmp));
+  assertEquals(711588532333838300, x *= ((-148161646.68183947)<<(tmp = -1149179108.8049204, tmp)));
+  assertEquals(0, x ^= (((2862565506)%x)/(tmp = -2865813112, tmp)));
+  assertEquals(-2064806628, x += (((tmp = -2677361175.7317276, tmp)/((817159440)>>>(tmp = 1895467706, tmp)))^(x|(tmp = -2309094859, tmp))));
+  assertEquals(-69806982479424, x *= ((x&(tmp = 2857559765.1909904, tmp))&(-3166908966.754988)));
+  assertEquals(-430255744, x %= ((((((-2968574724.119535)<<x)<<((tmp = 1603913671, tmp)%((-1495838556.661653)^(tmp = 1778219751, tmp))))*(-400364265))<<((((1607866371.235576)-(1961740136))|(1259754297))&(tmp = -1018024797.1352971, tmp)))^x));
+  assertEquals(6.828637393208647e-7, x /= (x*(tmp = 1464421, tmp)));
+  assertEquals(0, x &= x);
+  assertEquals(-0, x *= (((tmp = -2510016276, tmp)-(2088209546))<<((tmp = -1609442851.3789036, tmp)+(tmp = 1919930212, tmp))));
+  assertEquals(-0, x %= (tmp = 1965117998, tmp));
+  assertEquals(-290294792.53186846, x += ((tmp = -2361555894.5318685, tmp)%(2071261102)));
+  assertEquals(-70873, x >>= (tmp = 2206814124, tmp));
+  assertEquals(-141746, x += x);
+  assertEquals(-141733.9831459089, x -= (((tmp = -806523527, tmp)>>>(tmp = 1897214891, tmp))/x));
+  assertEquals(-141733.9831459089, x %= ((tmp = 1996295696, tmp)<<(tmp = 3124244672, tmp)));
+  assertEquals(141733.9831459089, x /= (x>>(2688555704.561076)));
+  assertEquals(3196954517.3075542, x -= (tmp = -3196812783.3244085, tmp));
+  assertEquals(-19929155, x |= (((x|x)+x)^((tmp = 391754876, tmp)-(((((((tmp = -3051902902.5100636, tmp)*(x/(1546924993)))|(tmp = 1494375949, tmp))/((((-795378522)/(tmp = 509984856, tmp))>>>(tmp = -106173186, tmp))+x))|x)|(1916921307))>>>x))));
+  assertEquals(1279271449, x &= ((tmp = 1289446971, tmp)&(tmp = 1836102619, tmp)));
+  assertEquals(17876992, x <<= (-207633461));
+  assertEquals(0, x >>= (tmp = -903885218.9406946, tmp));
+  assertEquals(0, x >>>= x);
+  assertEquals(-2999, x -= (((754533336.2183633)%(tmp = 557970276.0537136, tmp))>>(tmp = -1171045520, tmp)));
+  assertEquals(-0.000003020470363504361, x /= (tmp = 992891715.2229724, tmp));
+  assertEquals(1, x /= x);
+  assertEquals(0.45768595820301217, x %= ((tmp = 673779031, tmp)/(tmp = -1242414872.3263657, tmp)));
+  assertEquals(-980843052.1872087, x += (tmp = -980843052.6448946, tmp));
+  assertEquals(-Infinity, x /= ((((tmp = 317747175.8024508, tmp)&(x&(((tmp = 1632953053, tmp)>>x)/x)))%x)/(3145184986)));
+  assertEquals(0, x &= (x<<x));
+  assertEquals(0, x ^= (x-((2969023660.5619783)/x)));
+  assertEquals(0, x *= x);
+  assertEquals(NaN, x %= (x/(((x-x)/((tmp = -1622970458.3812745, tmp)-(1626134522)))&((((((tmp = 1384729039.4149384, tmp)^(x%(tmp = -2736365959, tmp)))+((-1465172172)%x))>>(tmp = -1839184810.2603343, tmp))^(((tmp = 1756918419, tmp)>>>(x+(x%(tmp = -2011122996.9794662, tmp))))<<(-3026600748.902623)))*((tmp = -2040286580, tmp)>>(-2899217430.655154))))));
+  assertEquals(0, x >>>= (tmp = 2100066003.3046467, tmp));
+  assertEquals(1362012169, x ^= (tmp = 1362012169, tmp));
+  assertEquals(1476312683, x |= ((457898409)>>>(-3079768830.723079)));
+  assertEquals(1441711, x >>>= (905040778.7770994));
+  assertEquals(2078530607521, x *= x);
+  assertEquals(-208193103, x |= ((tmp = -241750000, tmp)^x));
+  assertEquals(745036378, x ^= (((tmp = -1737151062.4726632, tmp)<<x)|(tmp = -1900321813, tmp)));
+  assertEquals(1744830464, x <<= x);
+  assertEquals(212992, x >>>= ((1210741037)-(x-(x>>>((x^(-1273817997.0036907))+((2401915056.5471)%(x<<(tmp = 1696738364.277438, tmp))))))));
+  assertEquals(0.0001604311565639742, x /= (1327622418));
+  assertEquals(0, x <<= (tmp = 166631979.34529006, tmp));
+  assertEquals(0, x *= ((((tmp = 657814984, tmp)/(((-831055031)>>>(1531978379.1768064))|((tmp = 2470027754.302619, tmp)^(-223467597))))/(tmp = 1678697269.468965, tmp))&(tmp = -1756260071.4360774, tmp)));
+  assertEquals(-2049375053, x ^= (tmp = -2049375053, tmp));
+  assertEquals(-1879109889, x |= (tmp = -1963586818.0436726, tmp));
+  assertEquals(718239919, x ^= (tmp = -1523550640.1925273, tmp));
+  assertEquals(-1361085185, x |= (-1939964707));
+  assertEquals(2, x >>>= (1864136030.7395325));
+  assertEquals(0.794648722849246, x %= ((-668830999)*(((-2227700170.7193384)%(x^(x>>>x)))/(tmp = 399149892, tmp))));
+  assertEquals(0, x >>= x);
+  assertEquals(0, x *= x);
+  assertEquals(0, x &= ((tmp = -2389008496.5948563, tmp)|((((tmp = -2635919193.905919, tmp)*((-64464127)<<(2136112830.1317358)))>>((184057979)*(-1204959085.8362718)))>>>(-442946870.3341484))));
+  assertEquals(-243793920, x -= ((tmp = 3002998032, tmp)<<((537875759)<<x)));
+  assertEquals(0, x -= x);
+  assertEquals(0, x *= ((((66852616.82442963)/((((x^x)&(2975318321.223734))+(((tmp = -1388210811.1249495, tmp)^((((-680567297.7620237)%(x-(tmp = -672906716.4672911, tmp)))-x)*(tmp = -1452125821.0132627, tmp)))*(((2770387154.5427895)%x)%x)))-x))<<((-1481832432.924325)>>(tmp = 3109693867, tmp)))>>>(x/(((((((tmp = 928294418, tmp)^(((-1018314535)/(tmp = -3167523001, tmp))%((((((tmp = -1639338126, tmp)-(tmp = -2613558829, tmp))&x)/x)%(tmp = 513624872, tmp))/((-520660667)&x))))*(2620452414))^((tmp = 2337189239.5949326, tmp)*(3200887846.7954993)))>>>((tmp = 1173330667, tmp)^x))<<x)>>(((tmp = -2475534594.982338, tmp)*x)|x)))));
+  assertEquals(0, x /= (2520915286));
+  assertEquals(0, x &= x);
+  assertEquals(0, x >>= (-1908119327));
+  assertEquals(0, x >>>= (tmp = 549007635, tmp));
+  assertEquals(0, x >>= (-994747873.8117285));
+  assertEquals(0, x <<= ((((x>>>((-3084793026.846681)%((1107295502)&(tmp = -296613957.8133817, tmp))))&((19637717.166736007)/(x+x)))+x)/(-2479724242)));
+  assertEquals(-695401420, x += (-695401420));
+  assertEquals(-695401394, x += (x>>>(tmp = 2340097307.6556053, tmp)));
+  assertEquals(-555745552, x -= (x|(-483851950.68644)));
+  assertEquals(-17825792, x <<= x);
+  assertEquals(-17825792, x >>= x);
+  assertEquals(-17, x %= ((tmp = 1799361095, tmp)|((x>>(((-1201252592)<<((((543273288)+(-2859945716.606924))*x)<<((-3030193601)<<(3081129914.9217644))))|((1471431587.981769)>>(-246180750))))|(((tmp = -2689251055.1605787, tmp)>>x)&(((2131333169)^x)-((tmp = -951555489, tmp)/x))))));
+  assertEquals(-8912896, x <<= (1146444211));
+  assertEquals(2854567584, x += (tmp = 2863480480, tmp));
+  assertEquals(426232502.24151134, x %= (1214167540.8792443));
+  assertEquals(1806802048, x ^= (-2368317898));
+  assertEquals(432537600, x <<= (tmp = 2831272652.589364, tmp));
+  assertEquals(432537600, x %= (((1713810619.3880467)-x)&((-2853023009.553296)&(tmp = -3158798098.3355417, tmp))));
+  assertEquals(-509804066, x += (tmp = -942341666, tmp));
+  assertEquals(-509804066, x %= (-732349220));
+  assertEquals(259900185710132350, x *= x);
+  assertEquals(711598501.7021885, x %= ((tmp = 2020395586.2280731, tmp)-(tmp = 3031459563.1386633, tmp)));
+  assertEquals(711598503.0618857, x += ((tmp = 967558548.4141241, tmp)/x));
+  assertEquals(711598503, x &= x);
+  assertEquals(711598503, x ^= (((((1609355669.1963444)+((((tmp = -2660082403.258437, tmp)+(tmp = -235367868, tmp))&(x/x))*((-2595932186.69466)|((tmp = -3039202860, tmp)<<x))))>>>(-951354869))-((tmp = -691482949.6335375, tmp)/(tmp = -1735502400, tmp)))/(tmp = 798440377, tmp)));
+  assertEquals(558262613882868500, x *= (784519095.4299527));
+  assertEquals(558262611968479000, x -= ((((tmp = 1039039153.4026555, tmp)/(-3138845051.6240187))*(tmp = 633557994, tmp))&(1981507217)));
+  assertEquals(1170427648, x |= ((x>>((((-1086327124)%((tmp = -1818798806.368613, tmp)^(tmp = 2183576654.9959817, tmp)))>>x)&((((((tmp = 1315985464.0330539, tmp)&(2774283689.333836))%x)*((2722693772.8994813)&(tmp = -2720671984.945404, tmp)))^(tmp = -76808019, tmp))<<((tmp = 685037799.2336662, tmp)^((tmp = 1057250849, tmp)&(tmp = 1469205111.2989025, tmp))))))+(x*(((tmp = 448288818.47173154, tmp)-(-2527606231))-((8387088.402292728)>>x)))));
+  assertEquals(558, x >>>= (tmp = 2732701109, tmp));
+  assertEquals(558, x &= x);
+  assertEquals(-0.00015855057024653912, x /= ((x+(((tmp = -1963815633, tmp)-(x>>x))-((x|x)>>x)))/x));
+  assertEquals(1.3458861596445712e-13, x /= (-1178038492.4116466));
+  assertEquals(0, x <<= (-104550232));
+  assertEquals(0, x >>>= (x>>(tmp = -255275244.12613606, tmp)));
+  assertEquals(0, x >>= x);
+  assertEquals(375, x |= ((1576819294.6991196)>>>(-2570246122)));
+  assertEquals(96000, x <<= ((2252913843.0150948)>>>(-49239716)));
+  assertEquals(6144000, x <<= ((((tmp = -2478967279, tmp)&((x%((tmp = -1705332610.8018858, tmp)+(x+(tmp = 590766349, tmp))))<<(tmp = 1759375933, tmp)))+(-2024465658.849834))&(1564539207.3650014)));
+  assertEquals(-1149239296, x <<= (1862803657.7241006));
+  assertEquals(-9, x >>= (((tmp = 463306384.05696774, tmp)^x)|((x>>((((-2098070856.799663)<<((-2054870274.9012866)<<(((-2582579691)/(829257170.0266814))<<(((((tmp = -1753535573.7074275, tmp)<<((x>>(-197886116))%((2487188445)%(tmp = 2465391564.873364, tmp))))&(((tmp = -500069832, tmp)&(tmp = 3016637032, tmp))&((tmp = 2525942628, tmp)|((((-920996215)|x)^((((tmp = -687548533.419106, tmp)&(1423222636.058937))<<((tmp = -1096532228, tmp)>>((((tmp = -3124481449.2740726, tmp)^(tmp = 2724328271.808975, tmp))>>x)*x)))+(-1661789589.5808442)))+(((x*(tmp = -1224371664.9549093, tmp))^((tmp = 3202970043, tmp)^x))/(tmp = 131494054.58501709, tmp))))))|(((tmp = -1654136720, tmp)<<x)>>((1652979932.362416)-(tmp = -863732721, tmp))))^(-113307998)))))^(-90820449.91417909))*((tmp = 641519890, tmp)-((((x<<(tmp = 2349936514.071881, tmp))*(2324420443.587892))^x)%(x<<((tmp = -1838473742, tmp)/(((-3154172718.4274178)-x)+x)))))))|(x>>>((tmp = 2096024376.4308293, tmp)<<x)))));
+  assertEquals(81, x *= x);
+  assertEquals(81, x &= x);
+  assertEquals(81, x %= (tmp = 2223962994, tmp));
+  assertEquals(81, x ^= ((x/(((-1606183420.099584)|(-1242175583))&(((x|((tmp = 828718431.3311573, tmp)/(x>>x)))+(((-2207542725.4531174)^(x*x))*(tmp = 551575809.955105, tmp)))/x)))&((x>>x)&x)));
+  assertEquals(81, x %= (tmp = 279598358.6976975, tmp));
+  assertEquals(101.72338484518858, x -= (((tmp = 2452584495.44003, tmp)%((-1181192721)+(((x>>(((x&x)^x)+((x>>>((x+(-2472793823.57181))/(((2854104951)>>(-1208718359.6554642))>>>(1089411895.694705))))/(x|(-2821482890.1780205)))))^(-1786654551))/(-29404242.70557475))))/(((-4352531)<<((-1227287545)<<x))%(-2558589438))));
+  assertEquals(101.72338484518858, x %= (-943645643));
+  assertEquals(0, x -= x);
+  assertEquals(0, x >>>= (-2440404084));
+  assertEquals(0, x >>= (tmp = 1029680958.405923, tmp));
+  assertEquals(0, x >>>= (1213820208.7204895));
+  assertEquals(-0, x /= (tmp = -103093683, tmp));
+  assertEquals(0, x >>>= (-2098144813));
+  assertEquals(-0, x /= (((-3087283334)+(((tmp = -3129028112.6859293, tmp)%(tmp = 2413829931.1605015, tmp))-(2578195237.8071446)))|x));
+  assertEquals(-15, x |= ((((-178926550.92823577)>>>(-965071271))^((tmp = -484633724.7237625, tmp)-(tmp = 473098919.1486404, tmp)))>>((-2264998310.203265)%(tmp = -499034672, tmp))));
+  assertEquals(0, x ^= x);
+  assertEquals(0, x >>= (((-3207915976.698118)<<(tmp = 2347058630, tmp))|(tmp = -2396250098.559627, tmp)));
+  assertEquals(NaN, x %= x);
+  assertEquals(NaN, x *= (621843222));
+  assertEquals(0, x >>= (((-2409032228.7238913)*x)-(tmp = -887793239, tmp)));
+  assertEquals(NaN, x /= x);
+  assertEquals(1193017666, x ^= (tmp = 1193017666, tmp));
+  assertEquals(3.5844761899682753, x /= (tmp = 332829011.206393, tmp));
+  assertEquals(-888572929, x |= (((tmp = 1032409228, tmp)+(tmp = -1920982163.7853453, tmp))+x));
+  assertEquals(-1817051951333455600, x *= (((-1506265102)^(tmp = -775881816, tmp))-(tmp = -32116372.59181881, tmp)));
+  assertEquals(-1638479616, x |= x);
+  assertEquals(-114489, x %= (((tmp = -247137297.37866855, tmp)>>>((((((-322805409)-x)^x)>>((((((((x>>>(tmp = -900610424.7148039, tmp))/(-1155208489.6240904))|((-2874045803)|(tmp = 3050499811, tmp)))+(x/((tmp = -613902712, tmp)^((-982142626.2892077)*((((tmp = -3201753245.6026397, tmp)|((1739238762.0423079)^x))/(243217629.47237313))^((tmp = -11944405.987132788, tmp)/(tmp = 2054031985.633406, tmp)))))))*(tmp = 2696108952.450961, tmp))*x)>>>(tmp = 3058430643.0660386, tmp))>>(x<<x)))>>(-984468302.7450335))%((tmp = 1302320585.246251, tmp)>>>x)))%(tmp = -2436842285.8208156, tmp)));
+  assertEquals(2047, x >>>= (2380161237));
+  assertEquals(0, x >>= x);
+  assertEquals(0, x &= (tmp = 980821012.975836, tmp));
+  assertEquals(-1090535537, x -= ((-3064511503.1214876)&((tmp = -2598316939.163751, tmp)<<((tmp = -969452391.8925576, tmp)*x))));
+  assertEquals(-2181071074, x += x);
+  assertEquals(1, x >>>= ((2902525386.449062)>>x));
+  assertEquals(1, x += (x&(tmp = -2643758684.6636515, tmp)));
+  assertEquals(1, x %= ((tmp = -2646526891.7004848, tmp)/x));
+  assertEquals(448735695.7888887, x -= (tmp = -448735694.7888887, tmp));
+  assertEquals(1, x /= x);
+  assertEquals(1, x >>= ((-480385726)<<(2641021142)));
+  assertEquals(1, x %= (375099107.9200462));
+  assertEquals(1, x >>= (((x&((tmp = -2402469116.9903326, tmp)%(tmp = -2862459555.860298, tmp)))*(tmp = -2834162871.0586414, tmp))%(((x>>>(tmp = 721589907.5073895, tmp))*(x^x))%(((tmp = 2844611489.231776, tmp)^((983556913)&(906035409.6693488)))^(x>>>(1239322375))))));
+  assertEquals(268435456, x <<= (tmp = 178807644.80966163, tmp));
+  assertEquals(44, x %= ((tmp = 2527026779.081539, tmp)>>>(2736129559)));
+  assertEquals(88, x += x);
+  assertEquals(0, x >>>= x);
+  assertEquals(0, x -= x);
+  assertEquals(-1523121602, x |= (2771845694));
+  assertEquals(-2, x >>= x);
+  assertEquals(-4, x += x);
+  assertEquals(-256, x <<= (((2522793132.8616533)>>(tmp = 77232772.94058788, tmp))+(3118669244.49152)));
+  assertEquals(4294967040, x >>>= x);
+  assertEquals(-256, x &= x);
+  assertEquals(1278370155.835435, x -= (-1278370411.835435));
+  assertEquals(-3.488228054921667, x /= (tmp = -366481243.6881058, tmp));
+  assertEquals(1.162742684973889, x /= ((x|(((((2404819175.562809)*(tmp = -2524589506, tmp))&(tmp = -675727145, tmp))>>>(x*x))&((-413250006)<<(tmp = 2408322715, tmp))))|((2940367603)>>>x)));
+  assertEquals(0, x >>>= ((2513665793)-(tmp = 1249857454.3367786, tmp)));
+  assertEquals(0, x ^= x);
+  assertEquals(0, x ^= x);
+  assertEquals(1989998348.6336238, x -= (-1989998348.6336238));
+  assertEquals(903237918.986834, x %= (1086760429.6467898));
+  assertEquals(-4.4185765232981975, x /= (-204418304));
+  assertEquals(1471621914, x ^= (tmp = -1471621914.1771696, tmp));
+  assertEquals(1471621914, x |= ((((((x<<(tmp = -2676407394.536844, tmp))%(((343324258)+(x/(x>>(((-221193011)>>>x)|x))))>>(((-2737713893)^((tmp = -49214797.00735545, tmp)+((-2818106123.172874)/(tmp = -2361786565.3028684, tmp))))<<(1859353297.6355076))))*(tmp = -751970685, tmp))|((tmp = 2502717391.425871, tmp)/(tmp = -2647169430, tmp)))*((tmp = -1647567294, tmp)&(((tmp = 1819557651, tmp)/x)>>((((-3073469753)/x)-(((tmp = -1973810496.6407511, tmp)&((x-(x+(tmp = -2986851659, tmp)))>>>(tmp = -2226975699, tmp)))|(418770782.142766)))<<x))))*(((((tmp = 125466732, tmp)/((((1453655756.398259)|(((874792086.7064595)-(194880772.91499102))>>>x))%(x<<(tmp = -1445557137, tmp)))<<x))>>>(tmp = -1953751906, tmp))/((tmp = -2140573172.2979035, tmp)*((-108581964)^x)))|(-481484013.0393069))));
+  assertEquals(1454179065, x += ((tmp = 947147038.2829313, tmp)|(tmp = -154822975.3629098, tmp)));
+  assertEquals(1, x /= x);
+  assertEquals(1, x %= ((((((tmp = -2262250297.991866, tmp)-(tmp = 481953960, tmp))/(1629215187.6020458))|(2515244216))>>>((tmp = -3040594752.2184515, tmp)-(tmp = -1116041279, tmp)))^(((-182133502)-(1065160192.6609197))+(((((-1850040207)^(tmp = -1570328610, tmp))^(tmp = 20542725.09256518, tmp))*x)|(2386866629)))));
+  assertEquals(1, x &= (2889186303));
+  assertEquals(0, x >>= (((-1323093107.050538)>>(x%x))-(((((((-1736522840)+(tmp = -2623890690.8318863, tmp))*(959395040.5565329))*(233734920))<<((x+(x%((tmp = -2370717284.4370327, tmp)%(tmp = 2109311949, tmp))))-(tmp = -1005532894, tmp)))|(861703605))>>>((2399820772)/x))));
+  assertEquals(0, x >>= x);
+  assertEquals(57233408, x |= ((tmp = 2655923764.4179816, tmp)*(-1353634624.3025436)));
+  assertEquals(997939728, x |= (980552208.9005274));
+  assertEquals(1859642592476610800, x *= (1863481872));
+  assertEquals(-977190656, x <<= x);
+  assertEquals(4.378357529141239e+26, x *= ((((x/(((tmp = 2429520991, tmp)/(x/(tmp = 784592802, tmp)))-(tmp = -2704781982, tmp)))*(tmp = -2161015768.2322354, tmp))&((((-3164868762)>>(tmp = 2390893153.32907, tmp))^x)>>(-2422626718.322538)))*(tmp = 278291869, tmp)));
+  assertEquals(4.378357529141239e+26, x -= (1710777896.992369));
+  assertEquals(0, x &= (((((tmp = -2532956158.400033, tmp)|((2195255831.279001)|(1051047432)))|(-1628591858))|(tmp = -2042607521.947963, tmp))>>((-1471225208)/(((-133621318)>>(1980416325.7358408))*((1741069593.1036062)-(x|(2133911581.991011)))))));
+  assertEquals(-0, x /= (-656083507));
+  assertEquals(NaN, x += ((tmp = -1071410982.2789869, tmp)%x));
+  assertEquals(NaN, x *= (tmp = -1513535145.3146675, tmp));
+  assertEquals(0, x >>= ((2831245247.5267224)>>(x<<((x+(((3068824580.7922907)|(1708295544.275714))*((tmp = -1662930228.1170444, tmp)-(((tmp = 1979994889, tmp)<<(tmp = -1826911988, tmp))&((x/(x<<(1909384611.043981)))+(1958052414.7139997))))))<<(tmp = 2481909816.56558, tmp)))));
+  assertEquals(0, x *= (((tmp = -2979739958.1614842, tmp)&x)+x));
+  assertEquals(-0, x *= ((-332769864.50313234)^x));
+  assertEquals(0, x >>= ((((689018886.1436445)+(tmp = -2819546038.620694, tmp))|(((tmp = -1459669934.9066005, tmp)|x)/x))<<(((tmp = 2640360389, tmp)/((x%((-1947492547.9056122)%((1487212416.2083092)-(-1751984129))))^x))%(tmp = 2666842881, tmp))));
+  assertEquals(-1801321460, x |= (tmp = 2493645836, tmp));
+  assertEquals(-1801321460, x %= (2400405136));
+  assertEquals(-2905399858195810300, x *= (tmp = 1612926911, tmp));
+  assertEquals(-2905399858195810300, x -= (x>>(tmp = 1603910263.9593458, tmp)));
+  assertEquals(-238798848, x &= ((tmp = -2638646212.767516, tmp)/(((tmp = 1755616291.436998, tmp)>>>(tmp = 1083349775, tmp))-(x%(((tmp = 1728859105.53634, tmp)^(1931522619.0403612))/(tmp = 712460587.0025489, tmp))))));
+  assertEquals(-2363873607.2302856, x += (-2125074759.230286));
+  assertEquals(1712665, x &= (((117229515)>>>(((1707090894.1915488)>>>((-1696008695)>>(((-1045367326.7522249)<<(tmp = -209334716, tmp))-x)))|(-1707909786.080653)))%(1260761349.172689)));
+  assertEquals(1073741824, x <<= (tmp = -289437762.34742975, tmp));
+  assertEquals(1073741824, x &= (tmp = 2079141140, tmp));
+  assertEquals(0, x <<= ((x^(-3139646716.1615124))-(((-362323071.74237394)|(tmp = 2989896849, tmp))*(tmp = -218217991, tmp))));
+  assertEquals(0, x &= (tmp = -1476835288.425903, tmp));
+  assertEquals(0, x >>>= (tmp = 61945262.70868635, tmp));
+  assertEquals(0, x ^= x);
+  assertEquals(-2735263498.7189775, x -= (2735263498.7189775));
+  assertEquals(-1182289920, x <<= (x+x));
+  assertEquals(-1182289580, x ^= ((2858446263.2258)>>>(2387398039.6273785)));
+  assertEquals(696693056, x &= ((2178665823)*(-51848583)));
+  assertEquals(1652555776, x <<= (((tmp = 2943916975, tmp)-((-1544273901)>>(-1671503106.2896929)))|x));
+  assertEquals(6455296, x >>>= (tmp = 1492638248.675439, tmp));
+  assertEquals(2097152, x &= (((x|x)*(2873891571.7000637))^((2165264807)+(tmp = 451721563, tmp))));
+  assertEquals(2097152, x %= (tmp = 1089484582.1455994, tmp));
+  assertEquals(2097152, x <<= x);
+  assertEquals(2097152, x &= ((tmp = 119096343.4032247, tmp)^((-1947874541)*x)));
+  assertEquals(0, x &= (tmp = 2363070677, tmp));
+  assertEquals(0, x &= ((tmp = -1897325383, tmp)>>>((2368480527)>>>((tmp = 1837528979, tmp)*(-1838904077)))));
+  assertEquals(-1898659416, x ^= (-1898659416.1125412));
+  assertEquals(-725506048, x <<= x);
+  assertEquals(1392943104, x <<= (295287938.9104482));
+  assertEquals(-63620329, x ^= ((tmp = -3175925826.5573816, tmp)-(tmp = 2474613927, tmp)));
+  assertEquals(-1135111726, x -= ((tmp = -1133259081, tmp)^(((tmp = -742228219, tmp)>>((-7801909.587711811)%((tmp = -642758873, tmp)+(tmp = 2893927824.6036444, tmp))))^((tmp = -2145465178.9142997, tmp)+x))));
+  assertEquals(0, x ^= x);
+  assertEquals(660714589, x |= (660714589));
+  assertEquals(660714676, x ^= ((-376720042.8047826)>>>(2196220344)));
+  assertEquals(660714676, x |= ((((((((x<<(-1140465568))-(tmp = -1648489774.1573918, tmp))%(((tmp = -2955505390.573639, tmp)*x)<<((((tmp = -1769375963, tmp)*(tmp = -440619797, tmp))&((tmp = 1904284066, tmp)%(-2420852665.0629807)))+(-324601009.2063596))))>>(tmp = 2317210783.9757776, tmp))^((tmp = 750057067.4541628, tmp)^(tmp = -1391814244.7286487, tmp)))>>((344544658.6054913)%((tmp = -1508630423.218488, tmp)&(tmp = 1918909238.2974637, tmp))))>>((-647746783.685822)&(tmp = 2444858958.3595476, tmp)))&x));
+  assertEquals(-962337195, x ^= (tmp = -507358495.30825853, tmp));
+  assertEquals(-182008925.58535767, x %= (tmp = -195082067.35366058, tmp));
+  assertEquals(502070, x >>>= (tmp = 1459732237.1447744, tmp));
+  assertEquals(-2391009930.7235765, x -= (tmp = 2391512000.7235765, tmp));
+  assertEquals(1568669696, x <<= x);
+  assertEquals(0, x <<= (tmp = -571056688.2717848, tmp));
+  assertEquals(1770376226, x ^= (tmp = 1770376226.0584736, tmp));
+  assertEquals(0, x ^= x);
+  assertEquals(0, x &= ((((x<<x)>>>x)|x)|(((tmp = -2141573723, tmp)^x)|(64299956))));
+  assertEquals(0, x ^= x);
+  assertEquals(0, x &= x);
+  assertEquals(0, x <<= (1106060336.7362857));
+  assertEquals(-0, x /= (x|(tmp = 2760823963, tmp)));
+  assertEquals(0, x <<= ((-2436225757)|(-1800598694.4062433)));
+  assertEquals(0, x >>>= ((-728332508.9870625)<<x));
+  assertEquals(-173377680, x ^= ((tmp = -173377680, tmp)%(tmp = -2843994892, tmp)));
+  assertEquals(-173377680, x |= ((((-819217898)&(tmp = -1321650255, tmp))&(x+((x^x)<<((1700753064)>>((((((-1038799327)>>((782275464)^x))-(tmp = -2113814317.8539028, tmp))>>(2143804838))&x)-((2970418921)/(-3073015285.6587048)))))))&((-1759593079.4077306)%((1699128805)-((tmp = -467193967, tmp)&(((2225788267.3466334)*(((2687946762.5504274)+x)>>>x))<<(-1853556066.880512)))))));
+  assertEquals(-0.5520657226957338, x /= ((tmp = -755493878, tmp)&(tmp = 918108389, tmp)));
+  assertEquals(0.30477656217556287, x *= x);
+  assertEquals(0, x &= ((tmp = -2746007517, tmp)<<(2749629340)));
+  assertEquals(0, x ^= ((x%(tmp = 1683077876, tmp))%(-162706778)));
+  assertEquals(0, x *= (tmp = 10203423, tmp));
+  assertEquals(119043212.1461842, x += (tmp = 119043212.1461842, tmp));
+  assertEquals(587202560, x <<= (tmp = 658697910.7051642, tmp));
+  assertEquals(-138689730, x |= (x-(tmp = 1296317634.5661907, tmp)));
+  assertEquals(-138663011, x -= ((-1751010109.5506423)>>(152829872)));
+  assertEquals(-138663011, x %= (-1266200468));
+  assertEquals(-138663011, x &= (x|((tmp = -571277275.622529, tmp)<<x)));
+  assertEquals(-138663011, x >>= ((971259905.1265712)*(tmp = 2203764981, tmp)));
+  assertEquals(-138663011, x %= (-904715829));
+  assertEquals(-138663011, x |= ((tmp = -2823047885.283391, tmp)>>>(((tmp = 533217000, tmp)|(650754598.7836078))|(-1475565890))));
+  assertEquals(-1610612736, x <<= x);
+  assertEquals(-1610612736, x &= x);
+  assertEquals(163840, x >>>= (-188885010));
+  assertEquals(-1224224814, x |= (tmp = 3070742482, tmp));
+  assertEquals(1498726395213334500, x *= x);
+  assertEquals(1723591210, x |= ((tmp = 615164458, tmp)|x));
+  assertEquals(1721910480, x ^= (x>>>x));
+  assertEquals(4505284605.764313, x -= (tmp = -2783374125.7643127, tmp));
+  assertEquals(-9504912393868483000, x *= (((tmp = 2896651872, tmp)<<(-2896385692.9017262))&(((((tmp = -2081179810.20238, tmp)|(tmp = -2484863999, tmp))>>((tmp = 1560885110.2665749, tmp)/(((tmp = 934324123.4289343, tmp)<<((tmp = -1591614157.0496385, tmp)+x))/(((x%(((tmp = 1672629986.8055913, tmp)%x)>>(tmp = 2116315086.2559657, tmp)))/(((-2687682697.5806303)>>x)/(-2034391222.5029132)))%(x-((((((tmp = 2598594967, tmp)/(((((((2950032233)%x)/x)^(tmp = -2126753451.3732262, tmp))<<(tmp = -3019113473, tmp))+(tmp = -2021220129.2320697, tmp))%((((-587645875.4666483)>>(((((x+x)+x)&(tmp = 533801785, tmp))|x)-((tmp = -2224808495.678903, tmp)/(1501942300))))>>>(-2558947646))>>((2798508249.020792)>>>x))))>>>((1060584557)/((((((((x&x)|(1426725365))>>>(tmp = 1500508838, tmp))>>(-1328705938))*((tmp = -2288009425.598777, tmp)>>>(((2586897285.9759064)%((-1605651559.2122297)>>>(tmp = 1936736684.4887302, tmp)))+((tmp = 2316261040, tmp)^(570340750.353874)))))&(x^((tmp = -2266524143, tmp)-(tmp = 2358520476, tmp))))+(tmp = 1449254900.9222453, tmp))%((-100598196)%((tmp = -2985318242.153491, tmp)>>((620722274.4565848)>>(871118975)))))))<<x)*(tmp = -1287065606.4143271, tmp))>>>(1038059916.2438471)))))))+((x/(-276990308.1264961))&(tmp = 2471016351.2195315, tmp)))|(((((tmp = -1288792769.3210807, tmp)+((tmp = -641817194, tmp)*(x<<(((-1933817364)>>(((tmp = 2084673536, tmp)|x)&x))&(tmp = -2752464480, tmp)))))%((796026752)*x))+(((tmp = -3083359669, tmp)|x)-((715303522)|(tmp = 181297266, tmp))))*(-1691520182.3207517)))));
+  assertEquals(0, x <<= (-2322389800));
+  assertEquals(0, x *= (tmp = 3188682235, tmp));
+  assertEquals(0, x |= (x>>>((tmp = -2729325231.8288336, tmp)^((-393497076.96012783)*(x/(tmp = -2198942459.9466457, tmp))))));
+  assertEquals(0, x ^= x);
+  assertEquals(0, x %= (2835024997.4447937));
+  assertEquals(0, x <<= x);
+  assertEquals(0, x >>= (tmp = 1109824126, tmp));
+  assertEquals(0, x <<= (3013043386));
+  assertEquals(206825782.74659085, x -= (-206825782.74659085));
+  assertEquals(-645346761227699500, x *= (-3120243292));
+  assertEquals(6825462, x >>= ((tmp = 1457908135, tmp)<<x));
+  assertEquals(-612366097.9189918, x -= (619191559.9189918));
+  assertEquals(-612306090.9189918, x -= ((2328676543.893506)>>x));
+  assertEquals(0, x ^= (x>>(((x>>>(1856200611.2269292))&(tmp = 2003217473, tmp))%((((((-107135673)+(((3062079356.170611)<<(tmp = -676928983, tmp))>>((tmp = -1487074941.2638814, tmp)|((-1601614031)/(1317006144.5025365)))))+x)*(((1163301641)>>>(448796567))/((x%((tmp = 72293197.34410787, tmp)+(-2304112723)))/((455610361)%(-2799431520)))))>>>(-217305041.09432888))<<(x-(tmp = -2168353649, tmp))))));
+  assertEquals(0, x >>= x);
+  assertEquals(-Infinity, x -= (((-1651597599.8950624)+(1780404320))/x));
+  assertEquals(0, x <<= (tmp = 2246420272.4321294, tmp));
+  assertEquals(0, x *= ((2793605382)-(tmp = -272299011, tmp)));
+  assertEquals(0, x *= x);
+  assertEquals(0, x <<= x);
+  assertEquals(0, x >>= (tmp = 2556413090, tmp));
+  assertEquals(0, x >>= ((tmp = -1784710085, tmp)%x));
+  assertEquals(0, x %= (tmp = -1929880813, tmp));
+  assertEquals(0, x *= (2586983368));
+  assertEquals(0, x &= x);
+  assertEquals(0, x <<= (-2144588807));
+  assertEquals(0, x ^= ((x<<(((((((-596537598)+((x-(((((((tmp = -3179604796, tmp)/((tmp = 1156725365.3543215, tmp)>>>(tmp = -2762144319, tmp)))%(x<<x))&((tmp = 1750241928.1271567, tmp)&(x/((tmp = 1781306819, tmp)|x))))+((((2893068644)/((tmp = -576164593.9720252, tmp)<<((2724671.48995471)&(tmp = -573132475, tmp))))%(tmp = -1355625108, tmp))&(tmp = -302869512.5880568, tmp)))+x)<<x))>>((tmp = -2569172808, tmp)/x)))^x)-(tmp = -1174006275.2213159, tmp))&x)&(((((((-2303274799)>>(tmp = -814839320, tmp))/(tmp = 183887306.09810615, tmp))>>(((tmp = 1054106394.3704875, tmp)|x)>>>x))-(x-(tmp = 1313696830, tmp)))-((tmp = 2373274399.0742035, tmp)|((((tmp = -3163779539.4902935, tmp)*(tmp = -3056125181.726942, tmp))&(((x^(x^(x/((tmp = -576441696.6015451, tmp)<<(tmp = -26223719.920306206, tmp)))))>>(tmp = -2332835940, tmp))|((-146303509.41093707)&(tmp = -2676964025, tmp))))/((((x*(tmp = 1059918020, tmp))|((((2341797349)|(tmp = -744763805.1381104, tmp))<<x)+((2991320875.552578)^(2920702604.701831))))^(-1721756138))^(((tmp = -2794367554, tmp)>>((-2671235923.2097874)<<(x&((((tmp = -621472314.0859051, tmp)-(((x*x)+x)>>>((tmp = 1834038956, tmp)+x)))*x)^(tmp = -2090567586.321468, tmp)))))<<(321395210))))))>>>(tmp = -1207661719, tmp)))+(-2877264053.3805156)))/(x%(tmp = -2226991657.709366, tmp))));
+  assertEquals(0, x *= (tmp = 986904991.061398, tmp));
+  assertEquals(0, x -= (x%(650819306.6671969)));
+  assertEquals(0, x >>>= (905893666.2871252));
+  assertEquals(0, x += (((tmp = 2501942710.4804144, tmp)&x)/((tmp = -851080399.1751502, tmp)-(-1168623992))));
+  assertEquals(-0, x *= (tmp = -2014577821.4554045, tmp));
+  assertEquals(0, x &= (tmp = 1995246018, tmp));
+  assertEquals(0, x %= (1724355237.7031958));
+  assertEquals(-954696411, x += (((-2825222201)+(((1662353496.1795506)>>>(x-x))|(tmp = 225015046, tmp)))^(x&x)));
+  assertEquals(-2158427339993389800, x *= (2260852052.1539803));
+  assertEquals(19559, x >>>= (-862409169.4978967));
+  assertEquals(-0.000012241163878671237, x /= (x^(tmp = 2697144215.160239, tmp)));
+  assertEquals(0, x -= x);
+  assertEquals(1448177644, x |= (tmp = 1448177644.624848, tmp));
+  assertEquals(1448177644, x %= (((-1497553637.4976408)+(402228446))<<x));
+  assertEquals(2304640553, x -= (-856462909));
+  assertEquals(152436736, x &= ((766686903)*(((tmp = 660964683.1744609, tmp)|((((tmp = 297369746, tmp)-(x+((tmp = -2677127146, tmp)/x)))>>(((((((x%(x<<x))-(((((529254728)|((x|(-1407086127.6088922))&(tmp = -1968465008.5000398, tmp)))/(x%x))&((((-2761805265.92574)-x)*(x^(tmp = 110730179, tmp)))%((177220657.06030762)*(((2532585190.671373)/x)+(-1465143151)))))<<((tmp = -3008848338, tmp)<<(-2475597073))))|((-192996756.38619018)|((((1445996780)|(x>>>((((tmp = -2482370545.791443, tmp)*(tmp = -270543594, tmp))^x)*((1346780586)/(tmp = -625613363.885356, tmp)))))-(x<<(x/(-562307527))))&(-125701272))))*((x&x)%(tmp = 752963070, tmp)))>>>(tmp = 17419750.79086232, tmp))*x)^(x^((-157821212.04674292)-(tmp = 503849221.598824, tmp)))))-(tmp = 1479418449, tmp)))>>>((((((-78138548.2193842)<<(((2319032860.806689)-(tmp = -1564963892.5137577, tmp))>>>(-73673322.28957987)))<<((1797573493.3467085)*x))>>(tmp = 759994997, tmp))>>>(-1066441220))&(((((((tmp = 1972048857, tmp)*(((x&((-1347017320.0747669)>>>x))*(-2332716925.705054))%(-376976019.24362826)))>>>((tmp = -466479974, tmp)+x))&(-2282789473.3675604))|(((((((((269205423.7510414)-(tmp = 21919626.105656862, tmp))*((x-(tmp = -378670528, tmp))>>(tmp = -1045706598, tmp)))>>(tmp = -3062647341.234485, tmp))>>>x)|(tmp = -285399599.9386575, tmp))%(tmp = 2731214562, tmp))|((((tmp = 837093165.3438574, tmp)|(tmp = -2956931321, tmp))+((1871874558.3292787)<<((x|((tmp = -3169147427, tmp)%(((x^x)%(1479885041))%((1769991217)%(tmp = -1899472458, tmp)))))*(tmp = -837098563.71806, tmp))))>>(tmp = -1866722748, tmp)))-(2037734340.8345597)))>>((tmp = -1262019180.5332131, tmp)+(x*(1274173993.9800131))))*(tmp = 2336989321.855402, tmp))))));
+  assertEquals(4, x >>= (tmp = -2577728327, tmp));
+  assertEquals(16, x *= (x<<((2622323372.580596)*(tmp = -1947643367, tmp))));
+  assertEquals(33554432, x <<= (tmp = -2938370507, tmp));
+  assertEquals(-2399497018.987414, x -= (tmp = 2433051450.987414, tmp));
+  assertEquals(1, x /= x);
+  assertEquals(2, x <<= x);
+  assertEquals(0, x >>= (x&x));
+  assertEquals(0, x <<= x);
+}
+f();
diff --git a/deps/v8/test/mjsunit/numops-fuzz.js b/deps/v8/test/mjsunit/numops-fuzz.js
deleted file mode 100644
index bd7e4fa23a..0000000000
--- a/deps/v8/test/mjsunit/numops-fuzz.js
+++ /dev/null
@@ -1,4609 +0,0 @@
-// Copyright 2011 the V8 project authors. All rights reserved.
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-//       notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-//       copyright notice, this list of conditions and the following
-//       disclaimer in the documentation and/or other materials provided
-//       with the distribution.
-//     * Neither the name of Google Inc. nor the names of its
-//       contributors may be used to endorse or promote products derived
-//       from this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-function f() {
-  var x = 0;
-  var tmp = 0;
-  assertEquals(0, x /= (tmp = 798469700.4090232, tmp));
-  assertEquals(0, x *= (2714102322.365509));
-  assertEquals(0, x *= x);
-  assertEquals(139516372, x -= (tmp = -139516372, tmp));
-  assertEquals(1, x /= (x%(2620399703.344006)));
-  assertEquals(0, x >>>= x);
-  assertEquals(-2772151192.8633175, x -= (tmp = 2772151192.8633175, tmp));
-  assertEquals(-2786298206.8633175, x -= (14147014));
-  assertEquals(1509750523, x |= ((1073767916)-(tmp = 919311632.2789925, tmp)));
-  assertEquals(2262404051.926751, x += ((752653528.9267509)%x));
-  assertEquals(-270926893, x |= (tmp = 1837232194, tmp));
-  assertEquals(0.17730273401688765, x /= ((tmp = -2657202795, tmp)-(((((x|(tmp = -1187733892.282897, tmp))-x)<<(556523578))-x)+(-57905508.42881298))));
-  assertEquals(122483.56550261026, x *= ((((tmp = 2570017060.15193, tmp)%((-1862621126.9968336)>>x))>>(x>>(tmp = 2388674677, tmp)))>>>(-2919657526.470434)));
-  assertEquals(0, x ^= x);
-  assertEquals(0, x <<= (tmp = 2705124845.0455265, tmp));
-  assertEquals(0, x &= (-135286835.07069612));
-  assertEquals(-0, x *= ((tmp = -165810479.10020828, tmp)|x));
-  assertEquals(248741888, x += ((735976871.1308595)<<(-2608055185.0700903)));
-  assertEquals(139526144, x &= (tmp = -1454301068, tmp));
-  assertEquals(-0.047221345672746884, x /= (tmp = -2954726130.994727, tmp));
-  assertEquals(0, x <<= (x>>x));
-  assertEquals(0, x >>>= ((x+(912111201.488966))-(tmp = 1405800042.6070075, tmp)));
-  assertEquals(-1663642733, x |= (((-1663642733.5700119)<<(x^x))<<x));
-  assertEquals(-914358272, x <<= ((((-308411676)-(-618261840.9113789))%(-68488626.58621716))-x));
-  assertEquals(-1996488704, x &= (-1358622641.5848842));
-  assertEquals(-345978263, x += (1650510441));
-  assertEquals(3, x >>>= (-1106714178.701668));
-  assertEquals(1, x %= (((x>>(x>>(tmp = -3052773846.817114, tmp)))*(tmp = 1659218887.379526, tmp))&x));
-  assertEquals(-943225672, x += (-943225673));
-  assertEquals(-0.41714300120060854, x /= (tmp = 2261156652, tmp));
-  assertEquals(0, x >>>= ((3107060934.8863482)<<(tmp = 1902730887, tmp)));
-  assertEquals(0, x &= x);
-  assertEquals(1476628, x |= ((tmp = -2782899841.390033, tmp)>>>(2097653770)));
-  assertEquals(0.0008887648921591833, x /= ((tmp = 1661438264.5253348, tmp)%((tmp = 2555939813, tmp)*(-877024323.6515315))));
-  assertEquals(0, x <<= (tmp = -2366551345, tmp));
-  assertEquals(0, x &= (tmp = 1742843591, tmp));
-  assertEquals(0, x -= x);
-  assertEquals(4239, x += ((-3183564176.232031)>>>(349622674.1255014)));
-  assertEquals(-67560, x -= ((2352742295)>>>x));
-  assertEquals(-67560, x &= x);
-  assertEquals(-0.00003219917807302283, x /= (2098190203.699741));
-  assertEquals(0, x -= x);
-  assertEquals(0, x >>= ((((tmp = -869086522.8358297, tmp)/(187820779))-(tmp = -2000970995.1931965, tmp))|(1853528755.6064696)));
-  assertEquals(0, x >>= (-3040509919));
-  assertEquals(0, x %= (((tmp = -2386688049.194946, tmp)<<(tmp = -669711391, tmp))|x));
-  assertEquals(0, x %= (tmp = -298431511.4839926, tmp));
-  assertEquals(0, x /= (2830845091.2793818));
-  assertEquals(0, x /= ((((-2529926178)|x)^((tmp = 2139313707.0894063, tmp)%((-1825768525.0541775)-(-952600362.7758243))))+x));
-  assertEquals(NaN, x /= x);
-  assertEquals(NaN, x -= x);
-  assertEquals(NaN, x /= (tmp = -432944480, tmp));
-  assertEquals(0, x <<= (((((x^((-1777523727)+(2194962794)))>>>(((((-590335134.8224905)%(x*(2198198974)))|(tmp = -2068556796, tmp))/(1060765637))*(-147051676)))/((tmp = -477350113.92686677, tmp)<<((x/(2018712621.0397925))^((tmp = 491163813.3921983, tmp)+(((x|((((x%(1990073256.812654))%((-2024388518.9599915)>>((tmp = 223182187, tmp)*(-722241065))))>>>(tmp = 2517147885.305745, tmp))%(1189996239.11222)))&x)%(-306932860))))))&((tmp = 1117802724.485684, tmp)+((-1391614045)-x)))%((((x>>((2958453447)*x))^(((410825859)|(((tmp = -1119269292.5495896, tmp)>>>(((((((x%(tmp = 648541746.6059314, tmp))*((-2304508480)<<((((x^(1408199888.1454597))|((251623937)|x))/((-382389946.9984102)|(tmp = -2082681143.5893767, tmp)))-(((tmp = 631243472, tmp)>>>(1407556544))/(((x>>>x)>>>(tmp = -6329025.47865057, tmp))>>>(tmp = 948664752.543093, tmp))))))/((((-183248880)>>x)&x)&x))>>x)&(((-978737284.8492057)%(tmp = 2983300011.737006, tmp))&(tmp = 2641937234.2954116, tmp)))<<x)>>(2795416632.9722223)))%((((tmp = -50926632, tmp)/x)&(((tmp = -2510786916, tmp)/x)/(-699755674)))|((((tmp = 1411792593, tmp)>>(924286570.2637128))>>((1609997725)>>(2735658951.0762663)))*(tmp = 726205435, tmp)))))<<(tmp = -2135055357.3156831, tmp)))/(tmp = 1408695065, tmp))^(tmp = -1343267739.8562133, tmp))));
-  assertEquals(0, x %= (-437232116));
-  assertEquals(-2463314518.2747326, x -= (2463314518.2747326));
-  assertEquals(109, x >>= (2401429560));
-  assertEquals(-2687641732.0253763, x += (-2687641841.0253763));
-  assertEquals(-2336375490019484000, x *= (tmp = 869303174.6678596, tmp));
-  assertEquals(5.458650430363785e+36, x *= x);
-  assertEquals(0, x |= ((((-1676972008.797291)*x)*((tmp = 2606991807, tmp)-x))<<x));
-  assertEquals(0, x &= ((-3053393759.3496876)+(-1431008367)));
-  assertEquals(-856728369, x |= (x-(((((764337872)/x)<<((x|(((tmp = 1409368192.1268077, tmp)+(tmp = -848083676, tmp))|(-2797102463.7915916)))^x))/x)^(tmp = 856728369.0589117, tmp))));
-  assertEquals(-0, x %= x);
-  assertEquals(1116550103, x ^= (-3178417193));
-  assertEquals(1116550103, x %= (tmp = -1482481942, tmp));
-  assertEquals(133, x >>>= x);
-  assertEquals(-1.381429241671034e-7, x /= ((tmp = -962771116.8101778, tmp)^x));
-  assertEquals(-1092268961, x |= ((tmp = 3202672531, tmp)-((x-(tmp = 845529357, tmp))>>(tmp = -868680593, tmp))));
-  assertEquals(-1092268961, x %= (tmp = 2670840415.304719, tmp));
-  assertEquals(-122794480, x %= (tmp = 969474481, tmp));
-  assertEquals(-297606521542193600, x *= (2423614820));
-  assertEquals(72460064, x >>>= (tmp = -1230798655, tmp));
-  assertEquals(-203714325373689600, x *= (-2811401400));
-  assertEquals(2154914048, x >>>= (((2241377026.001436)/x)+x));
-  assertEquals(1177864081, x ^= (tmp = -968513903, tmp));
-  assertEquals(35947664, x &= (-2086226758.2704995));
-  assertEquals(20795732539020670, x += (x*(578500247)));
-  assertEquals(-892004992, x >>= x);
-  assertEquals(-7023661.354330708, x /= ((((((1740714214)%((tmp = -459699286, tmp)+(tmp = -1700187400, tmp)))>>(tmp = -3170295237, tmp))+(tmp = -497509780, tmp))+((1971976144.6197853)+(661992813.6077721)))>>>(-1683802728)));
-  assertEquals(-1634205696, x <<= x);
-  assertEquals(-7, x >>= (-3187653764.930914));
-  assertEquals(-5.095345981491203, x -= ((tmp = 748315289, tmp)/(tmp = -392887780, tmp)));
-  assertEquals(1486531570, x &= (1486531570.9300508));
-  assertEquals(5670, x >>= (((tmp = -2486758205.26425, tmp)*(732510414))|x));
-  assertEquals(5670, x >>= (((-1811879946.2553763)%(1797475764))/(((tmp = -2159923884, tmp)|x)+(tmp = -1774410807, tmp))));
-  assertEquals(38, x %= (x>>>x));
-  assertEquals(-151134215, x ^= (((tmp = -2593085609.5622163, tmp)+((tmp = -814992345.7516887, tmp)-(534809571)))|(tmp = -232678571, tmp)));
-  assertEquals(-234881024, x <<= x);
-  assertEquals(-234881024, x <<= (x>>>x));
-  assertEquals(55169095435288580, x *= x);
-  assertEquals(0, x >>= (tmp = 1176612256, tmp));
-  assertEquals(0, x <<= (1321866341.2486475));
-  assertEquals(0, x %= (x-(-602577995)));
-  assertEquals(0, x >>>= (((((tmp = -125628635.79970193, tmp)^(tmp = 1294209955.229382, tmp))&(((tmp = -2353256654.0725203, tmp)|((-1136743028.9425385)|((((950703429.1110399)-(x>>>x))/((((x%(-252705869.21126103))/((tmp = 886957620, tmp)<<(x%((tmp = -1952249741, tmp)*(tmp = -1998149844, tmp)))))|(tmp = 1933366713, tmp))|((tmp = -2957141565, tmp)>>>(tmp = 1408598804, tmp))))+(((((((-2455002047.4910946)%(tmp = -528017836, tmp))&((-2693432769)/(tmp = 2484427670.9045153, tmp)))%(-356969659))-((((((tmp = 3104828644.0753174, tmp)%(x>>>(tmp = 820832137.8175925, tmp)))*((tmp = 763080553.9260503, tmp)+(3173597855)))<<(((-510785437)^x)<<(x|(((x*(x%((tmp = -1391951515, tmp)/x)))-x)|(x-((-522681793.93221474)/((2514619703.2162743)*(2936688324))))))))|x)>>>(-2093210042)))&(763129279.3651779))&x))))-x))%(((-1331164821)&(tmp = 1342684586, tmp))<<(x<<(tmp = 2675008614.588005, tmp))))>>((2625292569.8984914)+(-3185992401))));
-  assertEquals(0, x *= (tmp = 671817215.1147974, tmp));
-  assertEquals(-1608821121, x ^= ((tmp = 2686146175.04077, tmp)>>>x));
-  assertEquals(-0, x %= x);
-  assertEquals(-0, x /= ((tmp = 286794551.0720866, tmp)|(x%x)));
-  assertEquals(0, x <<= (x|(tmp = 1095503996.2285218, tmp)));
-  assertEquals(443296752, x ^= (443296752));
-  assertEquals(110824188, x >>= ((184708570)>>(x&x)));
-  assertEquals(0.7908194935161674, x /= ((((167151154.63381648)&((tmp = -1434120690, tmp)-(tmp = 2346173080, tmp)))/(56656051.87305987))^(140138414)));
-  assertEquals(-0.9027245492678485, x *= ((tmp = 1724366578, tmp)/(((2979477411)<<(((897038568)>>(tmp = 348960298, tmp))%(281056223.2037884)))^((((-1383133388)-(((-1379748375)-((x>>(x&(tmp = 2456582046, tmp)))>>>(-2923911755.565961)))&x))<<(-2825791731))^(tmp = -1979992970, tmp)))));
-  assertEquals(0, x &= (2482304279));
-  assertEquals(-0, x *= (-2284213673));
-  assertEquals(0, x <<= ((2874381218.015819)|x));
-  assertEquals(0, x *= (x>>>(tmp = 2172786480, tmp)));
-  assertEquals(0, x &= (-1638727867.2978938));
-  assertEquals(0, x %= ((tmp = -2213947368.285817, tmp)>>x));
-  assertEquals(0, x >>>= (tmp = -531324706, tmp));
-  assertEquals(0, x %= (tmp = -2338792486, tmp));
-  assertEquals(0, x <<= (((tmp = 351012164, tmp)<<(x|((tmp = -3023836638.5337825, tmp)^(-2678806692))))|x));
-  assertEquals(0, x %= (x-(tmp = -3220231305.45039, tmp)));
-  assertEquals(0, x <<= (-2132833261));
-  assertEquals(0, x >>>= x);
-  assertEquals(0, x %= ((2544970469)+(((-2633093458.5911965)&(644108176))-(x>>>(tmp = -949043718, tmp)))));
-  assertEquals(-2750531265, x += (-2750531265));
-  assertEquals(0, x >>= x);
-  assertEquals(0, x *= ((tmp = 1299005700, tmp)-x));
-  assertEquals(0, x >>= x);
-  assertEquals(-1785515304, x -= (((((-806054462.5563161)/x)>>>x)+(1785515304))|((tmp = 2937069788.9396844, tmp)/x)));
-  assertEquals(-3810117159.173689, x -= (2024601855.1736891));
-  assertEquals(-6.276064139320051, x /= (607087033.3053156));
-  assertEquals(134217727, x >>>= (((x%(tmp = 924293127, tmp))^x)|((x>>>(x&((((tmp = -413386639, tmp)/(x>>(tmp = 599075308.8479941, tmp)))^(tmp = -1076703198, tmp))*((tmp = -2239117284, tmp)>>(655036983)))))-x)));
-  assertEquals(134217727, x %= (tmp = 2452642261.038778, tmp));
-  assertEquals(-569504740360507, x *= ((tmp = -1086243941, tmp)>>(tmp = 1850668904.4885683, tmp)));
-  assertEquals(113378806, x >>>= (tmp = -2558233435, tmp));
-  assertEquals(979264375, x -= (((x>>(1950008052))%((2917183569.0209)*(tmp = 1184250640.446752, tmp)))|((((tmp = -691875212, tmp)-(-2872881803))>>(tmp = 44162204.97461021, tmp))^(tmp = 865885647, tmp))));
-  assertEquals(-1127813632, x <<= ((((tmp = -2210499281, tmp)>>>x)-(tmp = 2359697240, tmp))-x));
-  assertEquals(-1707799657, x ^= (653518231.3995534));
-  assertEquals(2916579668449318000, x *= x);
-  assertEquals(2916579669254640600, x += (x&(tmp = 2986558026.399422, tmp)));
-  assertEquals(870995175, x ^= (2598813927.8991632));
-  assertEquals(870995175, x %= (-2857038782));
-  assertEquals(1869503575895591000, x *= (x|(x|(((tmp = 2478650307.4118147, tmp)*((tmp = 2576240847.476932, tmp)>>>x))<<x))));
-  assertEquals(-134947790, x |= ((tmp = 1150911808, tmp)*((2847735464)/(-2603172652.929262))));
-  assertEquals(-137053182, x -= ((tmp = 2155921819.0929346, tmp)>>>(x-(((-1960937402)-(-1907735074.2875962))%((1827808310)^(tmp = -2788307127, tmp))))));
-  assertEquals(-134824702, x |= (((2912578752.2395406)^(x%(((-2585660111.0638976)<<(((((tmp = 747742706, tmp)%(-1630261205))&((((x|(x|(-2619903144.278758)))|((2785710568.8651934)>>((-968301967.5982246)<<(x&x))))>>((x>>>((x>>>(tmp = -1402085797.0310762, tmp))*((tmp = -323729645.2250068, tmp)<<(tmp = 2234667799, tmp))))>>>(-167003745)))>>((924665972.4681011)<<x)))>>>x)<<((((x+x)+x)-(((tmp = 2399203431.0526247, tmp)-(-2872533271))-(((tmp = 914778794.2087344, tmp)-(tmp = 806353942.9502392, tmp))|(((tmp = 262924334.99231672, tmp)&x)|(tmp = -460248836.5602243, tmp)))))/x)))%((-1681000689)/(tmp = -2805054623.654228, tmp)))))*(tmp = 957346233.9619625, tmp)));
-  assertEquals(-3274838, x %= ((((tmp = 3155450543.3524327, tmp)>>>x)<<(tmp = 2103079652.3410985, tmp))>>x));
-  assertEquals(-3274838, x |= ((((tmp = 2148004645.639173, tmp)>>>(tmp = -1285119223, tmp))<<(((((-711596054)>>>(tmp = -2779776371.3473206, tmp))^(((((tmp = -1338880329.383915, tmp)<<((-1245247254.477341)>>x))*(tmp = -2649052844.20065, tmp))>>((1734345880.4600453)%(x/(2723093117.118899))))*(1252918475.3285656)))<<(2911356885))^x))<<(-1019761103)));
-  assertEquals(1703281954, x &= (((tmp = 1036570471.7412028, tmp)+((tmp = 3043119517, tmp)%(2374310816.8346715)))%(tmp = -2979155076, tmp)));
-  assertEquals(1741588391, x |= ((tmp = 1230009575.6003838, tmp)>>>(-1247515003.8152597)));
-  assertEquals(72869474.64782429, x %= (tmp = 1668718916.3521757, tmp));
-  assertEquals(770936242.104203, x += (698066767.4563787));
-  assertEquals(-0.2820604726420833, x /= (tmp = -2733230342, tmp));
-  assertEquals(403480578, x |= ((969730374)&(tmp = 1577889835, tmp)));
-  assertEquals(-1669557233, x ^= ((-1616812135)+(tmp = -456209292, tmp)));
-  assertEquals(-1630427, x >>= ((2327783031.1175823)/(226947662.4579488)));
-  assertEquals(131022, x >>>= ((tmp = -1325018897.2482083, tmp)>>(x&((((((-1588579772.9240348)<<(tmp = -1775580288.356329, tmp))<<(tmp = -1021528325.2075481, tmp))>>((tmp = 2373033451.079956, tmp)*(tmp = 810304612, tmp)))-((tmp = -639152097, tmp)<<(tmp = 513879484, tmp)))&(2593958513)))));
-  assertEquals(1, x >>= ((3033200222)-x));
-  assertEquals(-561146816.4851823, x += (tmp = -561146817.4851823, tmp));
-  assertEquals(-4.347990105831158, x /= ((((-1270435902)*x)%((tmp = 637328492.7386824, tmp)-(x>>(-749100689))))%(x+x)));
-  assertEquals(-1, x >>= x);
-  assertEquals(1, x *= x);
-  assertEquals(111316849706694460, x += ((966274056)*(x|(115202150))));
-  assertEquals(-1001883840, x >>= x);
-  assertEquals(-1001883840, x &= x);
-  assertEquals(-3006880758, x += ((((-2275110637.4054556)/((x+(tmp = -1390035090.4324536, tmp))>>(-5910593)))&(tmp = 378982420, tmp))|(tmp = 2289970378.568629, tmp)));
-  assertEquals(314474, x >>>= (x>>((tmp = -228007336.31281257, tmp)%(tmp = 1127648013, tmp))));
-  assertEquals(-17694827, x ^= ((tmp = 2095133598.1849852, tmp)|(-1978322311)));
-  assertEquals(1, x /= x);
-  assertEquals(1, x %= (-2323617209.7531185));
-  assertEquals(0, x >>>= (x*(tmp = -1574455400.489434, tmp)));
-  assertEquals(0, x >>= (3131854684));
-  assertEquals(2853609824, x += ((-231012098)-(tmp = -3084621922, tmp)));
-  assertEquals(8143089027629311000, x *= x);
-  assertEquals(313052685, x ^= (tmp = 2962303501, tmp));
-  assertEquals(4776, x >>= (tmp = 2271457232, tmp));
-  assertEquals(0.000002812258572702285, x /= (tmp = 1698279115, tmp));
-  assertEquals(0, x >>>= (tmp = 1698465782.0927145, tmp));
-  assertEquals(0, x <<= x);
-  assertEquals(0, x |= ((x<<((-1824760240.3040407)<<(2798263764.39145)))&(tmp = 1795988253.0493627, tmp)));
-  assertEquals(1782206945, x ^= (-2512760351.7881565));
-  assertEquals(7610569113843172000, x *= (((tmp = -44415823.92972565, tmp)&(tmp = 1402483498.9421625, tmp))+(tmp = 2909778666, tmp)));
-  assertEquals(15221138227873292000, x += (x-(tmp = -186948658.394145, tmp)));
-  assertEquals(0, x -= x);
-  assertEquals(-2238823252, x -= ((tmp = 2238823252, tmp)+x));
-  assertEquals(0, x -= x);
-  assertEquals(0, x >>= (2976069570));
-  assertEquals(0, x >>= ((tmp = -2358157433, tmp)/x));
-  assertEquals(-949967713, x ^= (tmp = -949967713, tmp));
-  assertEquals(-1, x >>= x);
-  assertEquals(-1522291702.1977966, x *= (1522291702.1977966));
-  assertEquals(-1522291702, x >>= ((((2290279800)|x)|(1793154434.6798015))&((-1161390929.0766077)>>>x)));
-  assertEquals(83894274, x &= (tmp = 1571058486, tmp));
-  assertEquals(43186847.90522933, x += ((tmp = -1131332988.0947707, tmp)%x));
-  assertEquals(0, x >>= (tmp = -1968312707.269359, tmp));
-  assertEquals(0, x &= (2507747643.26175));
-  assertEquals(0, x %= (tmp = 3190525303.366887, tmp));
-  assertEquals(-1968984602, x ^= (((x/(x|(-1607062026.5338054)))<<(tmp = 2207669861.8770065, tmp))+(tmp = 2325982694.956348, tmp)));
-  assertEquals(554, x >>>= (((tmp = -2302283871.993821, tmp)>>>(-3151835112))|(((((x%(-1534374264))/((731246012)<<(((883830997.1194847)<<(((-1337895080.1937215)/(tmp = 3166402571.8157315, tmp))^(tmp = -1563897595.5799441, tmp)))>>(tmp = -556816951.0537591, tmp))))>>(-2682203577))<<(x/((1654294674.865079)+x)))/((x^(-2189474695.4259806))/(-475915245.7363057)))));
-  assertEquals(1372586111, x ^= (1372586581));
-  assertEquals(1166831229, x -= ((-834168138)&(762573579)));
-  assertEquals(2333662456, x -= ((x>>x)-x));
-  assertEquals(-1961304840, x &= x);
-  assertEquals(-2130143128, x &= (2982852718.0711775));
-  assertEquals(1073741824, x <<= (-1446978661.6426942));
-  assertEquals(2097152, x >>>= ((-1424728215)-(((127872198)%(tmp = -2596923298, tmp))&x)));
-  assertEquals(2097152, x >>>= x);
-  assertEquals(0, x &= (x/(tmp = -518419194.42994523, tmp)));
-  assertEquals(0, x >>= ((x/(-1865078245))%(tmp = 2959239210, tmp)));
-  assertEquals(-0, x *= ((x|(-1721307400))|(-3206147171.9491577)));
-  assertEquals(0, x >>>= ((-694741143)&(tmp = -2196513947.699142, tmp)));
-  assertEquals(0, x <<= x);
-  assertEquals(0, x &= ((tmp = 2037824385.8836646, tmp)+((tmp = 1203034986.4647732, tmp)/(x>>>(((-1374881234)/(899771270.3237157))+((-2296524362.8020077)|(-1529870870)))))));
-  assertEquals(0, x >>= (tmp = 2770637816, tmp));
-  assertEquals(0, x ^= x);
-  assertEquals(-1861843456, x |= ((632402668)*((x|(tmp = -1032952662.8269436, tmp))|(tmp = 2671272511, tmp))));
-  assertEquals(-1861843456, x >>= (((x>>>x)+x)<<(-1600908842)));
-  assertEquals(-58182608, x >>= (x-(tmp = -2496617861, tmp)));
-  assertEquals(-3636413, x >>= (tmp = -400700028, tmp));
-  assertEquals(-7272826, x += x);
-  assertEquals(-1, x >>= ((tmp = -3184897005.3614545, tmp)-((-1799843014)|(tmp = 2832132915, tmp))));
-  assertEquals(-121800925.94209385, x *= (121800925.94209385));
-  assertEquals(-30450232, x >>= (-979274206.6261561));
-  assertEquals(-30450232, x >>= (tmp = -1028204832.5078967, tmp));
-  assertEquals(-30450232, x |= x);
-  assertEquals(965888871, x ^= (((((-2157753481.3375635)*((tmp = -1810667184.8165767, tmp)&((tmp = 2503908344.422232, tmp)|x)))>>(x>>(1601560785)))<<x)^(tmp = 943867311.6380403, tmp)));
-  assertEquals(7546006, x >>>= x);
-  assertEquals(7546006, x <<= ((tmp = 1388931761.780241, tmp)*(x-(tmp = -1245147647.0070577, tmp))));
-  assertEquals(12985628, x += (x&(-1520746354)));
-  assertEquals(12985628, x &= x);
-  assertEquals(12985628, x %= (tmp = 308641965, tmp));
-  assertEquals(685733278, x |= ((tmp = -1275653544, tmp)-((tmp = -1956798010.3773859, tmp)%(tmp = 2086889575.643448, tmp))));
-  assertEquals(679679376, x &= (2860752368));
-  assertEquals(1770773904, x |= (x<<(3200659207)));
-  assertEquals(1224886544, x &= (-585733767.6876519));
-  assertEquals(1224886544, x %= ((tmp = -114218494, tmp)-x));
-  assertEquals(1208109328, x &= (tmp = 1854361593, tmp));
-  assertEquals(18434, x >>>= x);
-  assertEquals(-349394636955256100, x *= (x*(-1028198742)));
-  assertEquals(-519536600.7713163, x %= (-1054085356.9120367));
-  assertEquals(-1610612736, x ^= ((tmp = -3126078854, tmp)&x));
-  assertEquals(-2637321565906333700, x *= (1637464740.5658746));
-  assertEquals(-2637321568051070500, x -= ((tmp = -1006718806, tmp)<<(3005848133.106345)));
-  assertEquals(368168695, x ^= (x^(tmp = 368168695.6881037, tmp)));
-  assertEquals(43, x >>>= x);
-  assertEquals(-2081297089, x |= ((167169305.77248895)+(-2248466405.3199244)));
-  assertEquals(-2474622167, x -= (tmp = 393325078, tmp));
-  assertEquals(-135109701, x %= (-1169756233));
-  assertEquals(0, x ^= x);
-  assertEquals(0, x >>= (((((tmp = -164768854, tmp)/(tmp = -1774989993.1909926, tmp))+x)-((-921438912)>>(tmp = -191772028.69249105, tmp)))-(tmp = 558728578.22033, tmp)));
-  assertEquals(0, x %= (tmp = 2188003745, tmp));
-  assertEquals(0, x <<= (((tmp = -999335540, tmp)>>((((325101977)/(tmp = -3036991542, tmp))<<(tmp = -213302488, tmp))+x))|(tmp = -1054204587, tmp)));
-  assertEquals(0, x &= ((2844053429.4720345)>>>x));
-  assertEquals(NaN, x %= x);
-  assertEquals(NaN, x -= (-1481729275.9118822));
-  assertEquals(NaN, x *= (tmp = 1098314618.2397528, tmp));
-  assertEquals(-1073741824, x ^= ((tmp = 1718545772, tmp)<<(((tmp = -81058910, tmp)-(2831123087.424368))+(tmp = 576710057.2361784, tmp))));
-  assertEquals(-2921155898.4793186, x -= (1847414074.4793184));
-  assertEquals(-1295646720, x <<= (2178621744));
-  assertEquals(-0.8906779709597907, x /= ((tmp = -2840292585.6837263, tmp)<<(x&((tmp = 892527695.6172305, tmp)>>>x))));
-  assertEquals(0, x <<= (((tmp = 3149667213.298993, tmp)>>(tmp = 1679370761.7226725, tmp))^(115417747.21537328)));
-  assertEquals(0, x |= x);
-  assertEquals(0, x %= ((-1112849427)>>(-1245508870.7514496)));
-  assertEquals(0, x &= x);
-  assertEquals(0, x |= x);
-  assertEquals(0, x >>>= ((3144100694.930459)>>>(tmp = 2408610503, tmp)));
-  assertEquals(0, x <<= ((tmp = 2671709754.0318713, tmp)%x));
-  assertEquals(0, x >>>= (x|((tmp = -3048578701, tmp)-(674147224))));
-  assertEquals(NaN, x %= x);
-  assertEquals(0, x &= ((tmp = -2084883715, tmp)|(((((-3008427069)+(875536047.4283574))>>>x)%(tmp = -450003426.1091652, tmp))%(((-2956878433.269356)|(x/((((x%((((((x<<(((tmp = -1581063482.510351, tmp)^x)-(tmp = 1364458217, tmp)))^((tmp = 1661446342, tmp)+(1307091014)))/(342270750.9901335))>>>(x&((1760980812.898993)&((tmp = 2878165745.6401143, tmp)/(((tmp = -981178013, tmp)/(-2338761668.29912))>>(-958462630))))))*((1807522840)^((tmp = 1885835034, tmp)^(-2538647938))))*(1673607540.0854697)))%x)>>x)<<x)))<<(853348877.2407281)))));
-  assertEquals(0, x >>>= x);
-  assertEquals(-1162790279, x -= (1162790279));
-  assertEquals(-1162790279, x >>= (((-490178658)*x)/((((((tmp = -1883861998.6699312, tmp)/(tmp = -2369967345.240594, tmp))+(3142759868.266447))&(508784917.8158537))&x)>>(-2129532322))));
-  assertEquals(-1360849740.9829152, x -= (x+(1360849740.9829152)));
-  assertEquals(1928392181, x ^= (-602670783));
-  assertEquals(19478708.898989897, x /= (((-2617861994)>>(tmp = 797256920, tmp))%(-1784987906)));
-  assertEquals(-8648903.575540157, x *= (((tmp = 673979276, tmp)/(-1517908716))%(x/x)));
-  assertEquals(-8648903.575540157, x %= ((((643195610.4221292)>>>(tmp = 2342669302, tmp))>>>(tmp = -1682965878, tmp))^((tmp = -208158937.63443017, tmp)>>((907286989)&(x<<(448634893))))));
-  assertEquals(1399288769, x ^= (tmp = -1407486728, tmp));
-  assertEquals(0, x &= (((1999255838.815517)/(tmp = 564646001, tmp))/(-3075888101.3274765)));
-  assertEquals(0, x ^= ((-78451711.59404826)%x));
-  assertEquals(-1351557131, x |= (2943410165));
-  assertEquals(1715626371, x -= (-3067183502));
-  assertEquals(71434240, x &= ((-1800066426)<<(((((x<<(-324796375))+x)<<(tmp = 2696824955.735132, tmp))^x)%(tmp = 444916469, tmp))));
-  assertEquals(71434240, x >>>= (((x&((x%x)|x))+(tmp = 2226992348.3050146, tmp))<<(-305526260)));
-  assertEquals(0, x -= (x%(tmp = 582790928.5832802, tmp)));
-  assertEquals(0, x *= ((x%(1865155340))>>>((x<<(2600488191))^(-308995123))));
-  assertEquals(0, x >>= (x&(-3120043868.8531103)));
-  assertEquals(0, x |= x);
-  assertEquals(-0, x *= (tmp = -172569944, tmp));
-  assertEquals(0, x <<= (-1664372874));
-  assertEquals(1377713344.6784928, x += (tmp = 1377713344.6784928, tmp));
-  assertEquals(1377713344, x |= x);
-  assertEquals(-232833282, x |= (tmp = 2685870654, tmp));
-  assertEquals(84639, x -= (((((2778531079.998492)%(2029165314))>>>(tmp = -468881172.3729558, tmp))^x)|((x>>>((((x%(3044318992.943596))&(1996754328.2214756))^(1985227172.7485228))%(tmp = -1984848676.1347625, tmp)))|((tmp = 2637662639, tmp)<<x))));
-  assertEquals(0, x ^= x);
-  assertEquals(1237720303, x -= (-1237720303));
-  assertEquals(2, x >>= (-2148785379.428976));
-  assertEquals(2, x &= (tmp = -3087007874, tmp));
-  assertEquals(0, x %= x);
-  assertEquals(0, x >>>= x);
-  assertEquals(0, x >>>= x);
-  assertEquals(0, x += x);
-  assertEquals(0, x &= (2055693082));
-  assertEquals(-1349456492, x += (x^(-1349456492.315998)));
-  assertEquals(671088640, x <<= (x>>(-2030805724.5472062)));
-  assertEquals(-417654580004782100, x *= (tmp = -622353822, tmp));
-  assertEquals(1538160360, x |= (195983080.56698656));
-  assertEquals(733, x >>>= (tmp = 661085269, tmp));
-  assertEquals(657, x &= (-1611460943.993404));
-  assertEquals(431649, x *= x);
-  assertEquals(863298, x += x);
-  assertEquals(0, x &= ((1899423003)/((472439729)>>((tmp = 2903738952, tmp)+(tmp = 2164601630.3456993, tmp)))));
-  assertEquals(0, x &= (x>>>(tmp = 1939167951.2828958, tmp)));
-  assertEquals(1557813284, x |= (x-(-1557813284)));
-  assertEquals(72876068, x &= (662438974.2372154));
-  assertEquals(0.6695448637501589, x /= (tmp = 108844189.45702457, tmp));
-  assertEquals(0, x -= x);
-  assertEquals(2944889412, x += (2944889412));
-  assertEquals(3787980288, x -= ((((tmp = -2003814373.2301111, tmp)<<x)>>>(tmp = -3088357284.4405823, tmp))-(843090884)));
-  assertEquals(1, x >>>= (729274079));
-  assertEquals(1, x %= (-148002187.33869123));
-  assertEquals(3073988415.673201, x *= (tmp = 3073988415.673201, tmp));
-  assertEquals(4839166225.673201, x += (tmp = 1765177810, tmp));
-  assertEquals(4529373898.673201, x += (-309792327));
-  assertEquals(3097903.090496063, x %= (-150875866.51942348));
-  assertEquals(1270874112, x <<= ((((((tmp = -960966763.1418135, tmp)>>((((-3208596981.613482)>>>(tmp = 746403937.6913509, tmp))>>>(-2190042854.066803))/(2449323432)))*(-1272232665.791577))<<(-99306767.7209444))^((-1942103828)/((1570981655)/(tmp = 2381666337, tmp))))+(tmp = -1946759395.1558368, tmp)));
-  assertEquals(1273845956, x |= (tmp = -3197282108.6120167, tmp));
-  assertEquals(159230744, x >>= (((tmp = -1036031403.8108604, tmp)>>>(((3084964493)>>((x*x)^x))+(((2980108409.352001)^x)-(tmp = -2501685423.513927, tmp))))&(326263839)));
-  assertEquals(-370091747145550100, x *= (tmp = -2324248055.674161, tmp));
-  assertEquals(143384219.54999557, x /= (tmp = -2581119096, tmp));
-  assertEquals(1843396287, x |= (tmp = 1842718767, tmp));
-  assertEquals(2.4895593465813803, x /= (740450831));
-  assertEquals(2.4895593465813803, x %= ((((((((-3175333618)>>>((tmp = -1403880166, tmp)<<(tmp = -134875360, tmp)))>>>(2721317334.998084))<<(x&(tmp = 2924634208.1484184, tmp)))*((((x>>(tmp = -200319931.15328693, tmp))-(tmp = -495128933, tmp))+((-788052518.6610589)*((((tmp = 107902557, tmp)&(1221562660))%(x<<(((3155498059)*(((tmp = -1354381139.4897022, tmp)^(tmp = 3084557138.332852, tmp))*((((tmp = 1855251464.8464525, tmp)/((-1857403525.2008865)>>x))|x)-(-2061968455.0023944))))*(1917481864.84619))))^(x-(-508176709.52712965)))))+((((x%(-1942063404))+(x%(tmp = 855152281.180481, tmp)))|(-522863804))>>x)))>>>((tmp = -2515550553, tmp)&(((((-801095375)-(tmp = -2298729336.9792976, tmp))^x)/(tmp = 2370468053, tmp))>>(x|(tmp = -900008879, tmp)))))>>>(((tmp = -810295719.9509168, tmp)*((tmp = -1306212963.6226444, tmp)/(((tmp = 3175881540.9514832, tmp)|(-1439142297.819246))+((tmp = -134415617, tmp)|((-245801870)+x)))))>>(tmp = 1889815478, tmp)))-(((tmp = 597031177, tmp)%(858071823.7655672))+((tmp = 2320838665.8243756, tmp)|((938555608)<<(2351739219.6461897))))));
-  assertEquals(6.197905740150709, x *= x);
-  assertEquals(1, x /= x);
-  assertEquals(0, x >>= (-1639664165.9076233));
-  assertEquals(0, x >>= (-3135317748.801177));
-  assertEquals(0, x &= (3185479232.5325994));
-  assertEquals(-0, x *= ((-119759439.19668174)/(tmp = 2123964608, tmp)));
-  assertEquals(0, x /= (-1183061929.2827876));
-  assertEquals(0, x <<= (-1981831198));
-  assertEquals(0, x >>= ((((x<<(((((((-2133752838)&((tmp = -3045157736.9331336, tmp)>>>(x%x)))>>x)%(tmp = 3082217039, tmp))&(tmp = 270770770.97558427, tmp))|((-2212037556)^((((((2089224421)|(tmp = 360979560, tmp))<<x)%((tmp = -1679487690.6940534, tmp)+((173021423)|((tmp = 560900612, tmp)+((244376267.58977115)^x)))))<<(tmp = 2534513699, tmp))^x)))>>>(2915907189.4873834)))+(x*x))%(1637581117))%(tmp = 2363861105.3786244, tmp)));
-  assertEquals(0, x &= ((-2765495757.873004)&(1727406493)));
-  assertEquals(NaN, x -= (((((-1419667515.2616255)|x)-(150530256.48022234))%((((x|x)<<x)>>>(x^x))+x))-((-1216384577.3749187)*(495244398))));
-  assertEquals(NaN, x += (x^((tmp = 2472035493, tmp)+x)));
-  assertEquals(NaN, x %= ((tmp = -1753037412.885754, tmp)|((tmp = 2507058310, tmp)<<(1475945705))));
-  assertEquals(-1008981005, x |= ((tmp = -1140889842.6099494, tmp)-(tmp = -131908837, tmp)));
-  assertEquals(999230327.5872104, x -= (tmp = -2008211332.5872104, tmp));
-  assertEquals(975810, x >>= (((-1211913874)*x)>>>((-2842129009)>>(x&(tmp = -1410865834, tmp)))));
-  assertEquals(7623, x >>= ((tmp = -1051327071, tmp)-(((tmp = -237716102.8005445, tmp)|((2938903833.416546)&x))|(((-1831064579)^x)/((tmp = 2999232092, tmp)-(981996301.2875179))))));
-  assertEquals(0, x -= x);
-  assertEquals(0, x %= (x|(tmp = -666201160.5810485, tmp)));
-  assertEquals(-1347124100, x |= (-1347124100));
-  assertEquals(-0, x %= (x&x));
-  assertEquals(-661607963, x ^= (tmp = -661607963.3794863, tmp));
-  assertEquals(3465, x >>>= (-828119020.8056595));
-  assertEquals(-268431991, x -= (((tmp = -1386256352, tmp)^((tmp = 743629575, tmp)%((x*((tmp = -1719517658, tmp)>>(2019516558)))<<((2637317661)|x))))<<(tmp = -51637065, tmp)));
-  assertEquals(1578876380, x += ((tmp = 1847308371, tmp)&(((((((tmp = 1487934776.1893163, tmp)%(tmp = 1423264469.3137975, tmp))|(((2653260792.5668964)/(-2417905016.043802))>>>(2097411118.4501896)))^x)^(((tmp = -71334226, tmp)|x)>>>(tmp = -2771758874.7696714, tmp)))^((tmp = -1464849031.3240793, tmp)%(tmp = 2349739690.6430283, tmp)))/x)));
-  assertEquals(3269293934, x += (1690417554));
-  assertEquals(4025392608.031957, x -= (((tmp = 268501120.7225704, tmp)<<(tmp = 2841620654.8903794, tmp))+((tmp = 1606704462.8455591, tmp)/((-2601879963)/(tmp = 2966620168.989736, tmp)))));
-  assertEquals(7, x >>>= (x^(-1913800035)));
-  assertEquals(1.4326776816275493e-8, x /= ((((tmp = -2703417892, tmp)/x)^((-2693772270.396241)>>>((x-(tmp = 615999818.5666655, tmp))>>((((2308121439.3702726)<<((-1794701502)>>(x+(tmp = -2253406035.972883, tmp))))<<((tmp = -197103799.0624652, tmp)|(629975898)))>>>x))))>>>((tmp = 2833656803, tmp)^(x^(tmp = -1580436025, tmp)))));
-  assertEquals(0, x >>>= (tmp = 1525372830.2126007, tmp));
-  assertEquals(0, x %= ((2354010949.24469)>>>(x<<x)));
-  assertEquals(0, x ^= (((1112335059.6922574)*(tmp = -1874363935, tmp))&(((((2154894295.8360596)<<x)&(tmp = -270736315.13505507, tmp))&x)>>>(-2205692260.552064))));
-  assertEquals(0, x >>>= (x<<((1488533932)*(tmp = 1707754286, tmp))));
-  assertEquals(0, x >>= (((tmp = 1232547376.463387, tmp)%((x>>(711691823.1608362))>>>x))>>(((895039781.7478573)*(((((-334946524)&x)*(tmp = -1214529640, tmp))^(tmp = -1586820245, tmp))*(1062595445)))+x)));
-  assertEquals(0, x *= (1863299863.2631998));
-  assertEquals(0, x /= (tmp = 1858428705.1330547, tmp));
-  assertEquals(0, x &= x);
-  assertEquals(611788028, x += (x^(611788028.1510412)));
-  assertEquals(1, x /= x);
-  assertEquals(0, x >>= ((tmp = -1617320707.1784317, tmp)-((-2139400380)-(-1402777976))));
-  assertEquals(0, x >>= (415866827.34665));
-  assertEquals(-1990811897, x -= (tmp = 1990811897, tmp));
-  assertEquals(-1990811895, x += ((x>>>(tmp = -2175453282.769696, tmp))&(tmp = -1459450498.7327478, tmp)));
-  assertEquals(-2377017935.149517, x += (-386206040.1495173));
-  assertEquals(1946129845, x |= (tmp = -2890956796.936539, tmp));
-  assertEquals(0, x %= x);
-  assertEquals(0, x <<= (1616188263));
-  assertEquals(-1081213596, x ^= (tmp = 3213753700, tmp));
-  assertEquals(3213753700, x >>>= (tmp = -3211181312, tmp));
-  assertEquals(-1081213596, x &= x);
-  assertEquals(-1081213583, x ^= (((tmp = 1599988273.4926577, tmp)>>((((-1061394954.6331315)^x)+((-1835761078)*x))+(x%(tmp = -696221869, tmp))))/((tmp = -1156966790.3436491, tmp)^x)));
-  assertEquals(0, x ^= x);
-  assertEquals(NaN, x /= x);
-  assertEquals(NaN, x += (-1257400530.9263027));
-  assertEquals(NaN, x /= (753062089));
-  assertEquals(NaN, x *= ((tmp = 305418865.57012296, tmp)^(((-2797769706)+((((tmp = -33288276.988654375, tmp)%(tmp = 1242979846, tmp))|(-316574800))-((tmp = -1766083579.4203427, tmp)*(((x*(tmp = -2400342309.2349987, tmp))>>(tmp = 2632061795, tmp))^(tmp = -1001440809, tmp)))))^((((x-(tmp = -1469542637.6925495, tmp))-x)-(3184196890))%(((((((633226688)*((tmp = -2692547856, tmp)>>(((tmp = -1244311756, tmp)>>>x)+((1746013631.405202)>>>(941829464.1962085)))))%(x-x))+(995681795))-(tmp = -3047070551.3642616, tmp))/(1968259705))-((-2853237880)^(tmp = -2746628223.4540343, tmp)))))));
-  assertEquals(0, x >>= x);
-  assertEquals(0.5713172378854926, x += (((x+(((x+x)/(tmp = 2642822318, tmp))*(-2590095885.4280834)))|(tmp = -1769210836, tmp))/(tmp = -3096722308.8665104, tmp)));
-  assertEquals(-0.000002311097780334994, x /= ((2269858877.9010344)>>(-2992512915.984787)));
-  assertEquals(-0.000002311097780334994, x %= (-1139222821));
-  assertEquals(-0.000004622195560669988, x += x);
-  assertEquals(1, x /= x);
-  assertEquals(1, x >>>= (((3002169429.6061807)/(-3068577366))>>>((tmp = -1844537620, tmp)%((((tmp = 2087505119, tmp)>>>x)+x)&(2179989542)))));
-  assertEquals(-534213071, x *= (-534213071));
-  assertEquals(-534213077.3716287, x -= (((tmp = -2390432951.154034, tmp)^x)/(-290501980)));
-  assertEquals(1836305, x >>>= (x&x));
-  assertEquals(1836305, x %= ((x|((3070123855)^(49986396)))+((-1863644960.4202995)>>>((tmp = 1886126804.6019692, tmp)^x))));
-  assertEquals(28692, x >>>= ((2561362139.491764)>>(((((tmp = -1347469854.7413375, tmp)/(((x|(x+x))^((x^(tmp = -2737413775.4595394, tmp))^x))<<(((tmp = 225344844.07128417, tmp)&x)&(tmp = 145794498, tmp))))*x)<<(1424529187))/((-2924344715)/(tmp = -2125770148, tmp)))));
-  assertEquals(-2089419535.2717648, x += (-2089448227.2717648));
-  assertEquals(18957929, x ^= (tmp = 2186590872, tmp));
-  assertEquals(-708972800, x -= (727930729));
-  assertEquals(-4198593, x |= (799483455.1885371));
-  assertEquals(-1, x >>= (-2330654693.6413193));
-  assertEquals(-1, x |= (((tmp = -116877155, tmp)>>>((((tmp = -1677422314.1333556, tmp)/(tmp = -3108738499.0798397, tmp))%((x&(x/x))%((tmp = -695607185.1561592, tmp)-(tmp = 2302449181.622259, tmp))))^(((-1482743646.5604773)^((897705064)>>>x))-(tmp = -2933836669, tmp))))%(((tmp = -2991584625, tmp)|(((x>>x)+(-1101066835))-x))>>(-33192973.819939613))));
-  assertEquals(-1, x &= x);
-  assertEquals(-524288, x <<= (-1177513101.3087924));
-  assertEquals(1978770334.9189441, x += (tmp = 1979294622.9189441, tmp));
-  assertEquals(901783582, x &= ((-368584615)^(((((-478030699.2647903)<<x)<<x)+(tmp = 708725752, tmp))^((tmp = -3081556856, tmp)/(tmp = 1149958711.0676727, tmp)))));
-  assertEquals(-1480333211.8654308, x += (tmp = -2382116793.865431, tmp));
-  assertEquals(956930239.6783283, x *= ((tmp = 956930239.6783283, tmp)/x));
-  assertEquals(1277610.4668602513, x /= ((tmp = 1571029828, tmp)>>(tmp = 2417481141, tmp)));
-  assertEquals(-1077333228, x ^= (tmp = 3218755006, tmp));
-  assertEquals(-50218, x |= (tmp = -1044436526.6435988, tmp));
-  assertEquals(-1, x >>= (-154655245.18921852));
-  assertEquals(0.00006276207290978003, x *= (((tmp = 2234286992.9800305, tmp)>>(tmp = 2132564046.0696363, tmp))/((((tmp = -2565534644.3428087, tmp)>>>(tmp = 2622809851.043325, tmp))>>>((tmp = 311277386, tmp)&x))-(tmp = -2003980974, tmp))));
-  assertEquals(0, x %= x);
-  assertEquals(1282114076, x += ((((422838227)>>>((tmp = 1024613366.1899053, tmp)-((368275340)<<(((tmp = -3066121318, tmp)+(-2319101378))&x))))^(x>>(tmp = 1920136319.803412, tmp)))^(1282264803.3968434)));
-  assertEquals(-277097604, x |= (-283585688.9123297));
-  assertEquals(553816692, x &= (x&(tmp = 554082036.676608, tmp)));
-  assertEquals(658505728, x <<= x);
-  assertEquals(658505728, x &= (x%(2846071230)));
-  assertEquals(39, x >>= (334728536.5172192));
-  assertEquals(0, x -= x);
-  assertEquals(0, x += x);
-  assertEquals(0, x &= (tmp = -335285336, tmp));
-  assertEquals(0, x <<= (tmp = 1255594828.3430014, tmp));
-  assertEquals(0, x %= (-630772751.1248167));
-  assertEquals(NaN, x /= ((((x&(tmp = -1576090612, tmp))%x)>>>x)*((-1038073094.2787619)>>>x)));
-  assertEquals(NaN, x += x);
-  assertEquals(NaN, x -= (((tmp = -2663887803, tmp)&((x+(-1402421046))/x))/(-2675654483)));
-  assertEquals(NaN, x %= (x&(tmp = 672002093, tmp)));
-  assertEquals(0, x |= x);
-  assertEquals(-2698925754, x += (tmp = -2698925754, tmp));
-  assertEquals(-2057748993, x += ((tmp = -2263466497, tmp)^x));
-  assertEquals(1, x /= x);
-  assertEquals(-2769559719.4045835, x -= (2769559720.4045835));
-  assertEquals(-1.3964174646069973, x /= (tmp = 1983332198, tmp));
-  assertEquals(-2140716624.3964174, x += (tmp = -2140716623, tmp));
-  assertEquals(0, x <<= ((2589073007)-(-816764911.8571186)));
-  assertEquals(-2837097288.161354, x -= (tmp = 2837097288.161354, tmp));
-  assertEquals(-1445059927.161354, x += (tmp = 1392037361, tmp));
-  assertEquals(155197984, x &= (tmp = -2694712730.924674, tmp));
-  assertEquals(155197984, x |= (x>>>(tmp = 69118015.20305443, tmp)));
-  assertEquals(155197984, x >>>= (((x^(-1353660241))*x)<<(((((x%(tmp = -1905584634, tmp))>>>(tmp = -860171244.5963638, tmp))&(-1084415001.7039547))+(x-(((tmp = 298064661, tmp)>>x)>>((tmp = 378629912.383446, tmp)-(x%x)))))+(((3212580683)/(((((x^x)>>(tmp = -1502887218, tmp))<<x)%(-142779025))|(((tmp = 1361745708, tmp)*(((((tmp = 1797072528.0673332, tmp)+x)%(tmp = 167297609, tmp))%(-287345856.1791787))^(((((((x*(tmp = -640510459.1514752, tmp))<<(x^(tmp = 1387982082.5646644, tmp)))>>(tmp = 2473373497.467914, tmp))^((234025940)*x))+(tmp = 520098202.9546956, tmp))*(x*(tmp = -362929250.1775775, tmp)))^(-2379972900))))*(tmp = -1385817972, tmp))))+(-1788631834)))));
-  assertEquals(0, x >>= ((tmp = -18671049, tmp)/((tmp = 651261550.6716013, tmp)>>(-58105114.70740628))));
-  assertEquals(0, x *= ((((x>>(tmp = 2256492150.737681, tmp))<<(x<<(((-2738910707)&x)<<(1892428322))))*(tmp = 1547934638, tmp))>>((((319464033.7888391)|(((((tmp = 2705641070, tmp)<<((tmp = 1566904759.36666, tmp)*((-682175559.7540412)&(-691692016.3021002))))%(tmp = 1118101737, tmp))|(902774462))<<x))^((tmp = -388997180, tmp)<<(x<<((((((-88462733)+(x>>>x))%x)*(tmp = -20297481.556210756, tmp))>>>(1927423855.1719701))-((2047811185.6278129)-(tmp = 2952219346.72126, tmp))))))|(-1685518403.7513878))));
-  assertEquals(0, x /= (tmp = 1858074757.563318, tmp));
-  assertEquals(-1351623058, x ^= (-1351623058.4756806));
-  assertEquals(1, x /= x);
-  assertEquals(0, x ^= x);
-  assertEquals(0, x -= (x&(997878144.9798675)));
-  assertEquals(-0, x /= (-2769731277));
-  assertEquals(0, x >>>= ((-2598508325)>>(-1355571351)));
-  assertEquals(0, x >>>= x);
-  assertEquals(0, x -= (x&(tmp = 1672810223, tmp)));
-  assertEquals(-924449908.1999881, x -= (924449908.1999881));
-  assertEquals(-0, x %= x);
-  assertEquals(-0, x /= (tmp = 2007131382.059545, tmp));
-  assertEquals(-0, x += x);
-  assertEquals(225132064, x += ((((tmp = -2422670578.1260514, tmp)|x)+x)^(1660142894.7066057)));
-  assertEquals(Infinity, x /= (x-x));
-  assertEquals(0, x ^= x);
-  assertEquals(0, x <<= x);
-  assertEquals(-2455424946.732606, x -= (2455424946.732606));
-  assertEquals(1208029258, x &= ((tmp = 1823728509, tmp)+x));
-  assertEquals(1.3682499724725645, x /= ((((tmp = 1267938464.3854322, tmp)%((tmp = 2510853574, tmp)+(((2979355693.866435)-(tmp = 1989726095.7746763, tmp))<<x)))%((-1382092141.1627176)+(((-901799353)+((-2936414080.8254457)>>>(2515004943.0865674)))-(2532799222.353197))))<<(tmp = -2168058960.2694826, tmp)));
-  assertEquals(0.13799826710735907, x %= ((-1090423235)/(tmp = 2659024727, tmp)));
-  assertEquals(0, x >>= (1688542889.082693));
-  assertEquals(0, x <<= x);
-  assertEquals(NaN, x %= ((((tmp = 1461037539, tmp)<<((x<<(tmp = 2101282906.5302017, tmp))>>(-2792197742)))%(((x%x)^(((tmp = 1399565526, tmp)^(tmp = 643902, tmp))-((tmp = -1449543738, tmp)|x)))/x))*(x<<(471967867))));
-  assertEquals(0, x &= ((tmp = -2121748100.6824129, tmp)>>(tmp = -2817271480.6497793, tmp)));
-  assertEquals(0, x &= (3169130964.6291866));
-  assertEquals(-0, x /= (-2303316806));
-  assertEquals(0, x <<= (tmp = 120185946.51617038, tmp));
-  assertEquals(449448375, x ^= ((((tmp = -836410266.014014, tmp)/x)&((x>>>(tmp = -2602671283, tmp))+x))+(tmp = 449448375, tmp)));
-  assertEquals(202003841790140640, x *= x);
-  assertEquals(202003840800829020, x += (((tmp = -1339865843, tmp)+(tmp = 350554234.15375435, tmp))<<((((((tmp = -1798499687.8208885, tmp)>>(((x-(x^x))|((tmp = 463627396.23932934, tmp)/(2714928060)))&(tmp = 3048222568.1103754, tmp)))&(-3127578553))<<(tmp = -2569797028.8299003, tmp))&x)<<((tmp = 2104393646, tmp)/((tmp = 2314471015.742891, tmp)<<((2704090554.1746845)>>(((tmp = 1935999696, tmp)*(((1348554815)>>>x)>>>(146665093.82445252)))%x)))))));
-  assertEquals(202003841764125400, x -= (tmp = -963296372.2846234, tmp));
-  assertEquals(-413485056, x <<= (tmp = -2474480506.6054573, tmp));
-  assertEquals(-3171894580.186845, x += ((tmp = -1261111102, tmp)+(tmp = -1497298422.1868448, tmp)));
-  assertEquals(17136, x >>= (tmp = 3055058160, tmp));
-  assertEquals(17136, x %= (tmp = 1706784063.3577294, tmp));
-  assertEquals(17136, x >>= ((tmp = 2161213808, tmp)*x));
-  assertEquals(-17136, x /= ((((tmp = -1492618154, tmp)>>x)|(1381949066))>>(tmp = 2014457960, tmp)));
-  assertEquals(-34272, x += x);
-  assertEquals(-1498690902, x += (-1498656630));
-  assertEquals(-1168674482, x ^= (486325220));
-  assertEquals(-1168674482, x <<= ((x^x)*x));
-  assertEquals(794521557347068000, x *= (-679848469));
-  assertEquals(1.3330392590424505e+26, x *= (tmp = 167778866, tmp));
-  assertEquals(0, x <<= (tmp = -2501540637.3664584, tmp));
-  assertEquals(0, x >>>= (x-(x*(-890638026.1825848))));
-  assertEquals(0, x %= ((-285010538.2813468)&(1314684460.7634423)));
-  assertEquals(0, x -= x);
-  assertEquals(0, x *= x);
-  assertEquals(NaN, x %= (x*(x<<x)));
-  assertEquals(NaN, x %= (x<<(((tmp = -1763171810.601149, tmp)&(-138151449.18303752))^(x|x))));
-  assertEquals(0, x |= (x>>x));
-  assertEquals(0, x &= (tmp = 1107152048, tmp));
-  assertEquals(0, x >>= (1489117056.8200984));
-  assertEquals(518749976, x ^= (518749976.20107937));
-  assertEquals(356718654, x += (tmp = -162031322, tmp));
-  assertEquals(356718654, x %= (((x>>>((tmp = -373747439.09634733, tmp)*(tmp = 563665566, tmp)))*(tmp = 2853322586.588251, tmp))*((1303537213)%(-2995314284))));
-  assertEquals(5573728, x >>= (tmp = -2095997978, tmp));
-  assertEquals(5573728, x <<= x);
-  assertEquals(5573728, x >>= (((((tmp = 1745399178.334154, tmp)<<(tmp = 2647999783.8219824, tmp))^(tmp = 1571286759, tmp))%x)/(2166250345.181711)));
-  assertEquals(10886, x >>>= ((682837289)+(x*x)));
-  assertEquals(170, x >>>= x);
-  assertEquals(169.95167497151652, x -= (((tmp = 527356024.19706845, tmp)+((tmp = 1263164619.2954736, tmp)|(tmp = 2942471886, tmp)))/((3017909419.131321)+(tmp = 2137746252.8006272, tmp))));
-  assertEquals(-1915170061, x ^= (tmp = -1915170214, tmp));
-  assertEquals(206045792, x &= (((tmp = 887031922, tmp)>>>x)-((-1861922770)|(9633541))));
-  assertEquals(-1940321674, x |= (tmp = -2012149162.1817405, tmp));
-  assertEquals(-1940321674, x &= x);
-  assertEquals(1128412272.160699, x += (tmp = 3068733946.160699, tmp));
-  assertEquals(0.47486363523180236, x /= (tmp = 2376286976.807289, tmp));
-  assertEquals(-1.4931079540252477e-10, x /= (tmp = -3180370407.5892467, tmp));
-  assertEquals(0, x |= (((1220765170.5933602)*(884017786))*((x%(tmp = -2538196897.226384, tmp))<<(x^x))));
-  assertEquals(-525529894, x += (tmp = -525529894, tmp));
-  assertEquals(1621426184, x &= ((3046517714)*(((((-162481040.8033898)+(x/((x&(1489724492))/((x|(tmp = 943542303, tmp))>>>((-1840491388.1365871)<<(2338177232))))))+(((-2268887573.2430763)>>>(((tmp = 2919141667, tmp)+((tmp = 1326295559.692003, tmp)<<(-2256653815)))>>>(((((tmp = 1602731976.7514615, tmp)*(856036244.3730336))^x)>>>((((2846316421.252943)&(915324162))%(tmp = 1144577211.0221815, tmp))%x))*(x*x))))%(tmp = -2641416560, tmp)))*(x+(x>>>x)))>>x)));
-  assertEquals(1621426184, x %= (tmp = 1898223948, tmp));
-  assertEquals(-3.383396676504762, x /= ((tmp = 2211088034.5234556, tmp)^x));
-  assertEquals(7120923705.122882, x *= (((((tmp = 2632382342.914504, tmp)/(-615440284.1762738))&(2162453853.6658797))<<(-849038082.5298986))|(tmp = -2104667110.5603983, tmp)));
-  assertEquals(-1469010887, x &= x);
-  assertEquals(850767635866964700, x *= (tmp = -579143179.5338116, tmp));
-  assertEquals(0, x %= x);
-  assertEquals(-571457, x |= ((2849326490.8464212)|(tmp = 1450592063, tmp)));
-  assertEquals(-571457, x &= x);
-  assertEquals(-0.00018638416434019244, x /= (3066016912.021368));
-  assertEquals(0, x <<= (2058262829));
-  assertEquals(NaN, x %= ((x|((x%x)>>>x))%((tmp = -2970314895.6974382, tmp)+x)));
-  assertEquals(NaN, x *= (-698693934.9483855));
-  assertEquals(NaN, x += (-100150720.64391875));
-  assertEquals(NaN, x %= x);
-  assertEquals(NaN, x -= (-530301478));
-  assertEquals(NaN, x /= (1507673244));
-  assertEquals(0, x <<= (x%(tmp = 2977838420.857235, tmp)));
-  assertEquals(0, x <<= (tmp = 3200877763, tmp));
-  assertEquals(0, x <<= (tmp = -2592127060, tmp));
-  assertEquals(NaN, x -= (((((((1930632619)*(3018666359))<<((tmp = 2676511886, tmp)&(-2786714482.25468)))%x)-(-633193192))<<((tmp = 403293598, tmp)*(-2765170226)))%x));
-  assertEquals(530062092, x |= (tmp = 530062092, tmp));
-  assertEquals(129409, x >>>= x);
-  assertEquals(-152430382316341.78, x *= (-1177896300.229055));
-  assertEquals(-304860764632683.56, x += x);
-  assertEquals(0, x ^= x);
-  assertEquals(0, x %= (tmp = -63071565.367660046, tmp));
-  assertEquals(0, x &= ((((tmp = -1007464338, tmp)<<(x<<((x^(tmp = -726826835, tmp))|x)))>>>x)*(((tmp = 469293335.9161849, tmp)<<(((((tmp = 1035077379, tmp)*(tmp = -555174353.7567515, tmp))&(3109222796.8286266))-(((((x-(tmp = 1128900353.6650414, tmp))|(tmp = 3119921303, tmp))&((-1353827690)&(x%((-924615958)&x))))>>>x)+(tmp = 1167787910, tmp)))+x))%((605363594)>>(1784370958.269381)))));
-  assertEquals(0, x %= (2953812835.9781704));
-  assertEquals(0, x -= x);
-  assertEquals(0, x <<= x);
-  assertEquals(-901209266, x += (-901209266));
-  assertEquals(-901209266, x &= x);
-  assertEquals(404, x >>>= (-3195686249));
-  assertEquals(824237108, x ^= (824237472));
-  assertEquals(497790936.1853996, x /= ((tmp = 1253776028, tmp)/(757207285)));
-  assertEquals(497790936, x >>>= ((tmp = -2212598336, tmp)<<(x^(1335355792.9363852))));
-  assertEquals(0, x %= x);
-  assertEquals(-2659887352.6415873, x += (tmp = -2659887352.6415873, tmp));
-  assertEquals(1635079945, x |= ((x&(1234659380))>>((((tmp = 2694276886.979136, tmp)|x)^((tmp = 132795582, tmp)<<((-1089828902)>>>x)))<<((((tmp = -2098728613.0310376, tmp)<<(x/(tmp = -2253865599, tmp)))*((x+(x>>>((48633053.82579231)-(385301592))))*(tmp = -1847454853.333535, tmp)))/((-540428068.8583717)+x)))));
-  assertEquals(1, x /= x);
-  assertEquals(33554432, x <<= ((((2803140769)<<x)|(tmp = -1965793804, tmp))>>>(tmp = -2273336965.575082, tmp)));
-  assertEquals(67108864, x += x);
-  assertEquals(9007199254740992, x *= (x+((x>>x)%(2674760854))));
-  assertEquals(55369784, x %= (x|(-170725544.20038843)));
-  assertEquals(55369784, x %= (-1186186787));
-  assertEquals(0, x ^= x);
-  assertEquals(0, x <<= x);
-  assertEquals(NaN, x /= ((-2968110098)-((x/(x|(((((x|((x&((-130329882)>>>(((-135670650)|(x<<(tmp = 1280371822, tmp)))^x)))-(-1183024707.2230911)))&(-1072829280))>>>(-340696948.41492534))>>>(tmp = 436308526.4938295, tmp))<<(((tmp = 3113787500, tmp)*((2038309320)>>>(-1818917055)))&((2808000707)/(774731251))))))%x)));
-  assertEquals(0, x |= (x*(tmp = -843074864, tmp)));
-  assertEquals(0, x &= (tmp = -752261173.8090212, tmp));
-  assertEquals(0, x >>>= (tmp = 1532349931.7517128, tmp));
-  assertEquals(0, x <<= ((tmp = -8628768, tmp)-((((tmp = 225928543, tmp)%(x>>>(x+x)))^((tmp = -2051536806.5249376, tmp)-x))-((tmp = -2274310376.9964137, tmp)%(tmp = 2251342739, tmp)))));
-  assertEquals(0, x >>= (1011388449));
-  assertEquals(0, x += x);
-  assertEquals(0, x >>>= x);
-  assertEquals(-0, x *= ((-1781234179.8663826)>>(((1514201119.9761915)>>(((((1174857164.90042)^(tmp = 1124973934, tmp))^x)+((-1059246013.8834443)<<(2997611138.4876065)))%(((798188010)*(-1428293122))>>>(tmp = -3087267036.8035297, tmp))))<<x)));
-  assertEquals(1752554372, x ^= (tmp = -2542412924, tmp));
-  assertEquals(1752554372, x %= (tmp = 3037553410.2298307, tmp));
-  assertEquals(1859383977, x -= (x^(2446603103)));
-  assertEquals(1183048193, x &= ((tmp = -962336957, tmp)/(x/x)));
-  assertEquals(67738157, x %= ((((tmp = -1813911745.5223546, tmp)+x)<<(x-(((-1980179168)^x)|x)))|(1913769561.1308007)));
-  assertEquals(67698724, x &= ((1801574998.3142045)*((tmp = -2057492249, tmp)/((1713854494.72282)>>x))));
-  assertEquals(0, x -= x);
-  assertEquals(-25232836, x -= ((tmp = 25232836, tmp)|x));
-  assertEquals(-49, x >>= (x+((tmp = 2201204630.2897243, tmp)|(-1929326509))));
-  assertEquals(-1605632, x <<= x);
-  assertEquals(-165965313, x += (tmp = -164359681, tmp));
-  assertEquals(9.220413724941365e-10, x /= (((((tmp = 2579760013.0808706, tmp)*(tmp = -2535370639.9805303, tmp))>>((tmp = 2138199747.0301933, tmp)-(tmp = -2698019325.0972376, tmp)))*(tmp = -425284716, tmp))/((-1951538149.6611228)/(x^(2632919130)))));
-  assertEquals(0, x &= x);
-  assertEquals(0, x &= ((-645189137)/(tmp = 800952748, tmp)));
-  assertEquals(0, x &= (tmp = -1773606925, tmp));
-  assertEquals(0, x += x);
-  assertEquals(0, x >>>= (tmp = 211399355.0741787, tmp));
-  assertEquals(0, x <<= ((-1317040231.5737965)/((((((tmp = 838897586.0147077, tmp)|((-1902447594)|(tmp = 404942728.83034873, tmp)))^(2462760692.2907705))%((((((x%(tmp = -2888980287, tmp))<<(-368505224.49609876))-((x>>>(532513369))&(((((((tmp = -1298067543, tmp)^(tmp = -3130435881.100909, tmp))>>x)/(tmp = -3041161992, tmp))>>(x|(-431685991.95776653)))^((tmp = 1031777777, tmp)^((-105610810)>>>((-631433779)>>(tmp = -2577780871.167671, tmp)))))%(tmp = -3170517650.088039, tmp))))-(((tmp = 2175146237.968785, tmp)-((384631158.50508535)>>((893912279.4646157)|(tmp = -1478803924.5338967, tmp))))%(x/(-1089156420))))<<(tmp = -2024709456, tmp))>>x))*(tmp = -1423824994.6993582, tmp))%(tmp = 1739143409, tmp))));
-  assertEquals(-1799353648, x |= ((-1799353648.3589036)>>>((((x&(-923571640.1012449))%x)+((tmp = 971885508, tmp)>>((tmp = -2207464428.2123804, tmp)+(-3108177894.0459776))))-(-2048954486.7014258))));
-  assertEquals(-3666808032.2958965, x -= (tmp = 1867454384.2958965, tmp));
-  assertEquals(-260069478915415100, x *= (tmp = 70925305.23136711, tmp));
-  assertEquals(1142096768, x &= (tmp = 1866401706.9144325, tmp));
-  assertEquals(1, x >>>= (tmp = 2701377150.5717473, tmp));
-  assertEquals(1865946805, x |= (tmp = -2429020492, tmp));
-  assertEquals(1424222287, x ^= ((((tmp = 433781338, tmp)>>(x>>>((-2914418422.4829016)/(tmp = 1600920669, tmp))))|(tmp = 588320482.9566053, tmp))>>>((((((x+(tmp = -2556387365.5071325, tmp))+(tmp = -2381889946.1830974, tmp))/(3154278191))>>>(-1069701268.8022757))>>(((tmp = 182049089.28866422, tmp)>>x)>>>(tmp = -447146173, tmp)))/(x-(2103883357.0929923)))));
-  assertEquals(0, x ^= x);
-  assertEquals(0, x -= (x%(3036884806)));
-  assertEquals(0, x >>>= (tmp = -652793480.3870945, tmp));
-  assertEquals(0, x += x);
-  assertEquals(304031003, x ^= ((tmp = -900156495, tmp)^(-666397014.0711515)));
-  assertEquals(1, x /= x);
-  assertEquals(-1974501681, x |= (x^(-1974501681.4628205)));
-  assertEquals(-1.3089278317616264, x /= (((-1723703186.962839)>>>x)|((2061022161.6239533)<<x)));
-  assertEquals(-1, x |= (tmp = -1987006457, tmp));
-  assertEquals(-0.14285714285714285, x /= ((((((x|(-1767793799.7595732))-(-1391656680))<<x)|(x>>(tmp = -2301588485.2811003, tmp)))>>>(((tmp = 1812723993, tmp)>>>((x^(((tmp = -3154100157.951021, tmp)%((tmp = -1254955564.4553523, tmp)-(((x>>>(((-1762886343)*x)*x))*(x^(x*(-750918563.4387553))))*x)))|((x>>x)>>(x<<((((-1766797454.5634143)^(tmp = -2251474340, tmp))-(-787637516.5276759))<<((1390653368)^(-1937605249.245374)))))))|(((tmp = 1156611894, tmp)<<x)<<(x>>((((x+(tmp = 2170166060.881797, tmp))&(x>>>(tmp = -1749295923.1498983, tmp)))>>(((-1014973878)|x)&(1302866805.684057)))*(tmp = 560439074.4002491, tmp))))))|(-2758270803.4510045)))&x));
-  assertEquals(0, x |= x);
-  assertEquals(0, x += ((x>>((x+(tmp = -2776680860.870219, tmp))-(((688502468)<<(((tmp = 475364260.57888806, tmp)<<x)+(329071671)))/(-1097134948))))*(tmp = -1281834214.3416953, tmp)));
-  assertEquals(0, x *= ((((1159762330)<<(tmp = -1892429200, tmp))%x)<<x));
-  assertEquals(0, x >>>= (-770595225));
-  assertEquals(NaN, x += (((x>>x)/(tmp = 281621135, tmp))/x));
-  assertEquals(0, x >>= (1363890241));
-  assertEquals(1639023942.9945002, x += (1639023942.9945002));
-  assertEquals(-2568590958567747000, x *= (-1567146697));
-  assertEquals(1793554700, x ^= (tmp = 3215813388.405799, tmp));
-  assertEquals(437879, x >>= x);
-  assertEquals(1339485943, x |= (1339220210));
-  assertEquals(1, x /= x);
-  assertEquals(512, x <<= (2509226729.1477118));
-  assertEquals(512, x <<= ((x>>(1326274040.7181284))<<(tmp = -760670199, tmp)));
-  assertEquals(1, x /= (x<<(x^x)));
-  assertEquals(0, x >>>= (((((1382512625.8298302)&(x>>>x))*(tmp = -815316595, tmp))>>>x)-(-95538051)));
-  assertEquals(-544344229.3548596, x -= (tmp = 544344229.3548596, tmp));
-  assertEquals(-1088688458.7097192, x += x);
-  assertEquals(-1022850479579041900, x *= (939525418.3104812));
-  assertEquals(2069622661, x |= (-2632744187.7721186));
-  assertEquals(-1353480538017756400, x -= ((tmp = 1308085980, tmp)*((x>>>(-629663391.5165792))&(tmp = 3182319856.674114, tmp))));
-  assertEquals(1.3702811563654176e+27, x *= ((((3061414617.6321163)/(tmp = 2628865442, tmp))+(-1549548261))+(x&((tmp = 809684398, tmp)|(x^(tmp = 801765002, tmp))))));
-  assertEquals(0, x >>>= ((-2988504159)&((tmp = -260444190.02252054, tmp)^(2178729442.260293))));
-  assertEquals(-1518607002, x -= (tmp = 1518607002, tmp));
-  assertEquals(724566016, x <<= (tmp = 1042915731.7055794, tmp));
-  assertEquals(707584, x >>>= (-208959862.93305588));
-  assertEquals(0, x >>>= (((tmp = 877181764, tmp)>>(-970697753.3318911))%x));
-  assertEquals(0, x ^= x);
-  assertEquals(0, x += x);
-  assertEquals(0, x <<= x);
-  assertEquals(0, x /= (x^((x/(-2903618412.4936123))+(tmp = 1169288899, tmp))));
-  assertEquals(0, x >>>= x);
-  assertEquals(-1302645245, x ^= ((1855892732.3544865)+(tmp = 1136429319.5633948, tmp)));
-  assertEquals(0, x ^= x);
-  assertEquals(0, x &= (-1384534597.409375));
-  assertEquals(-0, x /= (tmp = -680466419.8289509, tmp));
-  assertEquals(-0, x *= (318728599.95017374));
-  assertEquals(NaN, x %= (x>>(2019695267)));
-  assertEquals(0, x >>= (tmp = 1280789995, tmp));
-  assertEquals(0, x *= (tmp = 2336951458, tmp));
-  assertEquals(0, x >>= ((2981466013.758637)%(731947033)));
-  assertEquals(0, x -= x);
-  assertEquals(0, x ^= x);
-  assertEquals(0, x /= ((((3068070149.1452317)>>x)%(((1448965452)*((tmp = -2961594129, tmp)+(1829082104.0681171)))>>(-2331499703)))>>>(tmp = -3206314941.2626476, tmp)));
-  assertEquals(0, x >>= (x%(1869217101.9823673)));
-  assertEquals(0, x <<= (x+x));
-  assertEquals(0, x >>>= ((1202130282)>>>x));
-  assertEquals(0, x += x);
-  assertEquals(2603245248.6273212, x += (tmp = 2603245248.6273212, tmp));
-  assertEquals(-1691864471, x ^= (x>>>(2504513614.117516)));
-  assertEquals(136835305, x -= ((-1618979896)&(-746953306)));
-  assertEquals(-2568499564.1261334, x += (tmp = -2705334869.1261334, tmp));
-  assertEquals(1038075700, x ^= (1530399136));
-  assertEquals(2076151400, x += x);
-  assertEquals(-524018410.1751909, x -= ((2398973627.175191)-(-201196183)));
-  assertEquals(0.327110599608614, x /= ((3181340288.602796)&x));
-  assertEquals(0.327110599608614, x %= (tmp = -2284484060, tmp));
-  assertEquals(0, x |= x);
-  assertEquals(403217947.5779772, x += (tmp = 403217947.5779772, tmp));
-  assertEquals(403217947, x |= x);
-  assertEquals(-Infinity, x *= ((58693583.845808744)+(((tmp = -1527787016, tmp)*x)/((((2532689893.3191843)/(tmp = 2781746479.850424, tmp))|(((((460850355.9211761)/((((tmp = 626683450, tmp)<<((tmp = 1349974710, tmp)-((tmp = -1349602292, tmp)/(-2199808871.1229663))))>>((x/(-3092436372.3078623))&(tmp = -1190631012.0323825, tmp)))^((-2907082828.4552956)-(tmp = 1858683340.1157017, tmp))))^(-1513755598.5398848))%x)/x))&(1147739260.136806)))));
-  assertEquals(0, x &= (tmp = -3047356844.109563, tmp));
-  assertEquals(637934616, x -= (tmp = -637934616, tmp));
-  assertEquals(-1553350083, x ^= (-2056266203.094929));
-  assertEquals(-0.13467351026547192, x %= ((tmp = 824736251, tmp)/(2544186314)));
-  assertEquals(1, x /= x);
-  assertEquals(1, x |= x);
-  assertEquals(0, x >>>= (2166609431.9515543));
-  assertEquals(0, x <<= (x|(tmp = 121899222.14603412, tmp)));
-  assertEquals(0, x *= (1300447849.6595674));
-  assertEquals(0, x %= (tmp = -2360500865.3944597, tmp));
-  assertEquals(0, x %= (tmp = -1693401247, tmp));
-  assertEquals(0, x >>= x);
-  assertEquals(0, x /= (471265307));
-  assertEquals(257349748, x ^= (257349748.689448));
-  assertEquals(257349748, x &= x);
-  assertEquals(981, x >>>= (tmp = -1959001422, tmp));
-  assertEquals(0, x >>= ((-79932778.18114972)/x));
-  assertEquals(0, x <<= (((-2599621472)^(tmp = 662071103, tmp))%(tmp = -2675822640.7641535, tmp)));
-  assertEquals(0, x &= (tmp = 2582354953.878623, tmp));
-  assertEquals(0, x /= ((-953254484)/((-2571632163.376176)-(tmp = -342034471, tmp))));
-  assertEquals(0, x <<= ((x-(tmp = -3013057672, tmp))&(tmp = -3204761036, tmp)));
-  assertEquals(0, x ^= ((x&((515934453)>>>x))/x));
-  assertEquals(1, x |= ((-1914707646.2075093)>>>(tmp = -1918045025, tmp)));
-  assertEquals(-2002844120.8792589, x += (tmp = -2002844121.8792589, tmp));
-  assertEquals(573030794, x >>>= (tmp = 1707788162, tmp));
-  assertEquals(1.917619109627369, x /= ((1909436830.484202)%((123114323)<<(tmp = -1288988388.6444468, tmp))));
-  assertEquals(-1400358045, x |= (-1400358046));
-  assertEquals(-2043022529.4273133, x += (tmp = -642664484.4273133, tmp));
-  assertEquals(-81408068.86728716, x %= (tmp = -980807230.2800131, tmp));
-  assertEquals(0.1436896445024992, x /= (((tmp = 3201789924.913518, tmp)%(tmp = -962242528.6008646, tmp))^((tmp = -338830119.55884504, tmp)*(tmp = -916120166, tmp))));
-  assertEquals(0.1436896445024992, x %= (tmp = 2598469263, tmp));
-  assertEquals(0, x *= (x-x));
-  assertEquals(-1409286144, x += (((-111514798.64745283)|(2372059654))<<(tmp = 175644313, tmp)));
-  assertEquals(-2393905467.0073113, x += (-984619323.0073113));
-  assertEquals(-835111172.0073113, x %= (x^(-765900532.5585573)));
-  assertEquals(-835111172.0073113, x %= (tmp = -946478116, tmp));
-  assertEquals(-100, x >>= ((-1020515908)>>(((x&((x^(169474253.53811646))>>(-221739002)))+x)*((201939882.92880356)/(tmp = -50402570, tmp)))));
-  assertEquals(2131506964, x &= (tmp = -2163460268, tmp));
-  assertEquals(1074275840, x &= ((-1561930379.8719592)*(tmp = -2871750052.876917, tmp)));
-  assertEquals(-954232605.5377102, x -= (tmp = 2028508445.5377102, tmp));
-  assertEquals(-29, x >>= (-279577351.87217045));
-  assertEquals(-232, x <<= x);
-  assertEquals(-70, x |= (215185578));
-  assertEquals(-1, x >>= (x>>(-1691303095)));
-  assertEquals(1, x /= x);
-  assertEquals(3149465364.2236686, x *= (3149465364.2236686));
-  assertEquals(3304787832.3790073, x += (tmp = 155322468.15533853, tmp));
-  assertEquals(100068712.23500109, x %= (tmp = 3204719120.1440063, tmp));
-  assertEquals(91628864, x &= (tmp = 629090241, tmp));
-  assertEquals(-113202292046379710, x *= (-1235443583));
-  assertEquals(122, x >>>= (tmp = 3196555256, tmp));
-  assertEquals(122, x >>>= (((2226535734)-x)^(2248399036.393125)));
-  assertEquals(6.904199169070746e-8, x /= (tmp = 1767040564.9149356, tmp));
-  assertEquals(-212687449.99999994, x += ((((2244322375)*(((2515994102)^x)>>x))<<(x-(-832407685.3251972)))^(2266670502)));
-  assertEquals(366515938514778750, x *= (tmp = -1723260768.3940866, tmp));
-  assertEquals(366515938514778750, x += ((-1643386193.9159095)/(tmp = 425161225.95316494, tmp)));
-  assertEquals(654872716.4123061, x /= ((-1377382984)-(tmp = -1937058061.811642, tmp)));
-  assertEquals(654872716, x &= x);
-  assertEquals(-86260926.17813063, x -= (tmp = 741133642.1781306, tmp));
-  assertEquals(1052176592, x >>>= x);
-  assertEquals(2020882856, x ^= (-3107796616));
-  assertEquals(0, x <<= ((606939871.9812952)|(tmp = -3127138319.1557302, tmp)));
-  assertEquals(NaN, x -= ((x%((1120711400.2242608)%x))*(tmp = -930171286.7999947, tmp)));
-  assertEquals(NaN, x %= (3215044180));
-  assertEquals(NaN, x %= (tmp = 2882893804.20102, tmp));
-  assertEquals(NaN, x %= ((217170359.5778643)^x));
-  assertEquals(0, x &= ((-1095125960.9903677)>>(x^(-2227981276))));
-  assertEquals(-748549860, x += (-748549860));
-  assertEquals(1816208256, x <<= (-610872411.3826082));
-  assertEquals(201400576, x &= (((tmp = 1910394603.4836266, tmp)<<x)^x));
-  assertEquals(0, x %= x);
-  assertEquals(NaN, x %= x);
-  assertEquals(0, x <<= (((((2670901339.6696005)%(2180020861))*((2134469504)/(2237096063.0680027)))*((tmp = 1203829756, tmp)>>((765467065)+(x|(2673651811.9494815)))))<<((-1463378514)|(((x/(tmp = -1075050081, tmp))-((-879974865)+x))>>>(tmp = 2172883926, tmp)))));
-  assertEquals(433013198, x ^= (433013198.2833413));
-  assertEquals(0, x >>= ((((-2404431196)%(x%(tmp = 1443152875.8809233, tmp)))&(x|((1414364997.0517852)/((tmp = -435854369, tmp)+(tmp = 2737625141, tmp)))))|(((tmp = 2241746562.2197237, tmp)^(tmp = -1606928010.1992552, tmp))|((tmp = -3083227418.686173, tmp)>>(tmp = -2717460410, tmp)))));
-  assertEquals(0, x >>= x);
-  assertEquals(0, x *= ((tmp = 2302521322, tmp)>>>(((((((tmp = 344089066.9725498, tmp)%(tmp = 1765830559, tmp))-x)|x)^(((-2450263325)/(tmp = 371928405.17475057, tmp))>>>(1330100413.7731652)))^(((173024329)%(tmp = -2927276187, tmp))+(x>>>(-1042229940.308507))))|(((((tmp = 379074096, tmp)+((142762508)-((-2773070834.526266)-(x&((tmp = 57957493, tmp)<<(2189553500))))))+((36991093)+(tmp = 339487168.58069587, tmp)))*(-1257565451))&(tmp = 645233114, tmp)))));
-  assertEquals(-2644503151.1185284, x += (-2644503151.1185284));
-  assertEquals(-5289006302.237057, x += x);
-  assertEquals(-4008773824.2370567, x -= (tmp = -1280232478, tmp));
-  assertEquals(1975449413, x |= ((tmp = 1957832005.4285066, tmp)>>((1681236712.9715524)&(-675823978))));
-  assertEquals(-146472960, x <<= (-648510672.5644083));
-  assertEquals(-3, x |= (((((x>>>(tmp = 2271744104, tmp))+(tmp = -210058133.30147195, tmp))+(tmp = -2827493425, tmp))/(tmp = 765962538, tmp))%(tmp = 1048631551, tmp)));
-  assertEquals(1, x /= x);
-  assertEquals(0, x >>= (1070524782.5154183));
-  assertEquals(0, x <<= (462502504));
-  assertEquals(0, x %= (540589670.0730014));
-  assertEquals(NaN, x %= x);
-  assertEquals(NaN, x /= ((-1268640098)%x));
-  assertEquals(NaN, x %= (1741157613.744652));
-  assertEquals(NaN, x += x);
-  assertEquals(NaN, x %= ((x|(tmp = 1992323492.7000637, tmp))*x));
-  assertEquals(NaN, x /= ((tmp = -2271503368.0341196, tmp)>>((tmp = 1224449194, tmp)>>>(tmp = 2976803997, tmp))));
-  assertEquals(NaN, x += (tmp = -1078313742.1633894, tmp));
-  assertEquals(NaN, x += (-787923311));
-  assertEquals(NaN, x %= x);
-  assertEquals(-1299878219, x ^= (2995089077));
-  assertEquals(536887953, x &= ((625660571.2651105)&(x^(((tmp = 950150725.2319129, tmp)+(-2122154205.466675))/(tmp = 1754964696.974752, tmp)))));
-  assertEquals(4096, x >>>= x);
-  assertEquals(1, x /= x);
-  assertEquals(-82508517, x ^= (((-930231800)%(tmp = -423861640.4356506, tmp))+x));
-  assertEquals(-82508517, x &= (x&x));
-  assertEquals(-479519, x %= ((tmp = 1861364600.595756, tmp)|x));
-  assertEquals(479518, x ^= (((x>>(-1539139751.6860313))>>(tmp = -456165734, tmp))|(-2786433531)));
-  assertEquals(959036, x += x);
-  assertEquals(29, x >>>= ((tmp = -1049329009.7632706, tmp)^(((((((1117739997)/(((-841179741.4939663)*(-1211599672))>>>((-413696355)%(tmp = -1753423217.2170188, tmp))))<<(tmp = 1599076219.09274, tmp))>>>(-1382960317))^(((x^(tmp = 515115394, tmp))>>>(tmp = -388476217, tmp))>>>(x/x)))^x)<<(136327532.213817))));
-  assertEquals(24, x &= (2388755418));
-  assertEquals(0, x >>>= (tmp = -405535917, tmp));
-  assertEquals(0, x &= (tmp = -1427139674, tmp));
-  assertEquals(NaN, x /= (x^((1530470340)%x)));
-  assertEquals(0, x |= ((x>>(-1429690909.8472774))*((((tmp = 2033516515, tmp)/(1314782862))>>>x)>>(tmp = 1737186497.6441216, tmp))));
-  assertEquals(0, x -= x);
-  assertEquals(0, x %= (3115422786));
-  assertEquals(-0, x *= (x+(tmp = -2558930842.267017, tmp)));
-  assertEquals(NaN, x %= x);
-  assertEquals(0, x &= (2695531252.254449));
-  assertEquals(-613178182, x ^= (-613178182));
-  assertEquals(54, x >>>= (x%(((tmp = 2277868389, tmp)^((((tmp = -1143932265.3616111, tmp)^((x&((x-((-2100384445.7850044)|(tmp = 908075129.3456883, tmp)))*x))+(((tmp = 1031013284.0275401, tmp)*((((tmp = -233393205, tmp)>>>(tmp = -111859419, tmp))*(-1199307178))|(tmp = -1998399599, tmp)))>>>((((-731759641.9036775)>>>(tmp = 2147849691, tmp))>>>(tmp = -2121899736, tmp))>>>(x>>>x)))))>>((1900348757.360562)^(tmp = 2726336203.6149445, tmp)))>>>((x*((tmp = -2697628471.0234947, tmp)%((x^(tmp = -2751379613.9474974, tmp))*x)))+(x>>(tmp = 42868998.384643435, tmp)))))+(598988941))));
-  assertEquals(34, x &= ((tmp = 2736218794.4991407, tmp)%(2169273288.1339874)));
-  assertEquals(2.086197133417468, x /= ((tmp = 2176358852.297597, tmp)%x));
-  assertEquals(2, x <<= (((tmp = -1767330075, tmp)|(-3107230779.8512735))&x));
-  assertEquals(4194304, x <<= (tmp = 1061841749.105744, tmp));
-  assertEquals(48609515, x ^= (44415211.320786595));
-  assertEquals(48609515, x %= (1308576139));
-  assertEquals(23735, x >>>= ((-324667786)-x));
-  assertEquals(23735, x <<= ((-1270911229)<<(((((tmp = -882992909.2692418, tmp)+(tmp = 394833767.947718, tmp))-x)<<(702856751))/x)));
-  assertEquals(-31080872939240, x *= (tmp = -1309495384, tmp));
-  assertEquals(-14625.31935626114, x /= ((668084131)+(1457057357)));
-  assertEquals(-14625.31935626114, x %= (266351304.6585492));
-  assertEquals(-12577, x |= (-945583977.619837));
-  assertEquals(-4097, x |= ((tmp = -2621808583.2322493, tmp)-(tmp = -2219802863.9072213, tmp)));
-  assertEquals(-1004843865, x &= ((-1004839768)+((tmp = 2094772311, tmp)/(-1340720370.275643))));
-  assertEquals(-31401371, x >>= ((2035921047)>>>((tmp = -1756995278, tmp)>>>(-537713689))));
-  assertEquals(1791746374.016472, x -= ((tmp = -1823147745, tmp)-(x/(tmp = -1906333520, tmp))));
-  assertEquals(3.7289343120517406, x /= (tmp = 480498240, tmp));
-  assertEquals(7.457868624103481, x += x);
-  assertEquals(234881024, x <<= (-781128807.2532628));
-  assertEquals(67108864, x &= (tmp = -2060391332, tmp));
-  assertEquals(-605958718, x -= (673067582));
-  assertEquals(-605958718, x <<= ((x%x)&((tmp = 1350579401.0801518, tmp)|x)));
-  assertEquals(-109268090.4715271, x %= (tmp = -496690627.5284729, tmp));
-  assertEquals(-109268090, x <<= (((-2004197436.8023896)%((x|((tmp = 271117765.61283946, tmp)-((1595775845.0754795)*(555248692.2512416))))/x))<<x));
-  assertEquals(-652725370, x &= (-543590449));
-  assertEquals(0.321858133298825, x /= (tmp = -2027990914.2267523, tmp));
-  assertEquals(1959498446, x ^= (1959498446));
-  assertEquals(1959498446, x &= (x%(tmp = 3155552362.973523, tmp)));
-  assertEquals(14949, x >>>= ((tmp = 586618136, tmp)>>>(tmp = 699144121.9458897, tmp)));
-  assertEquals(-28611391568319.285, x *= (tmp = -1913933478.3811147, tmp));
-  assertEquals(1680557633, x &= (((tmp = 2606436319.199714, tmp)<<(1575299025.6917372))|((-1092689109)/(735420388))));
-  assertEquals(1680361024, x &= ((tmp = 1860756552.2186172, tmp)|(-360434860.1699109)));
-  assertEquals(820488, x >>>= (1788658731));
-  assertEquals(820488, x >>= (-1555444352));
-  assertEquals(2104296413, x ^= (2103543509));
-  assertEquals(16843328, x &= ((x<<((-2920883149)/(1299091676)))-(((((tmp = 3199460211, tmp)+(-237287821.61504316))&(tmp = -1524515028.3596857, tmp))-(tmp = -700644414.6785603, tmp))+(-180715428.86124516))));
-  assertEquals(1326969834, x |= (tmp = -2968063574.793867, tmp));
-  assertEquals(0, x %= (x>>>(tmp = 1350490461.0012388, tmp)));
-  assertEquals(0, x &= ((-2620439260.902854)+x));
-  assertEquals(-1775533561, x |= ((-1775533561)|(((x>>>((861896808.2264911)>>>(970216466.6532537)))%x)%(tmp = 2007357223.8893046, tmp))));
-  assertEquals(-1775533561, x &= x);
-  assertEquals(-23058877.415584415, x /= ((tmp = -3002439857, tmp)>>((((x-(tmp = 1583620685.137125, tmp))|x)%(-2568798248.6863875))^x)));
-  assertEquals(-577.4155844151974, x %= (((-1440361053.047877)+((tmp = 821546785.0910633, tmp)-(((tmp = 1023830881.1444875, tmp)/(-754884477))+(tmp = 651938896.6258571, tmp))))>>(tmp = 346467413.8959185, tmp)));
-  assertEquals(-1, x >>= (tmp = 2993867511, tmp));
-  assertEquals(-1, x |= (tmp = 823150253.4916545, tmp));
-  assertEquals(-0, x %= x);
-  assertEquals(-0, x /= ((tmp = 997969036, tmp)&((((tmp = 928480121, tmp)>>(((-2610875857.086055)>>>(tmp = -2251704283, tmp))|x))+(10781750))>>x)));
-  assertEquals(0, x >>>= ((tmp = -1872319523, tmp)>>>(-278173884)));
-  assertEquals(0, x |= (x/(x*x)));
-  assertEquals(0, x %= ((77912826.10575807)^(tmp = 2770214585.3019757, tmp)));
-  assertEquals(0, x &= (tmp = 722275824, tmp));
-  assertEquals(-1417226266, x |= (tmp = 2877741030.1195555, tmp));
-  assertEquals(0, x ^= x);
-  assertEquals(0, x %= (tmp = -1740126105, tmp));
-  assertEquals(910709964, x |= (tmp = 910709964, tmp));
-  assertEquals(-1744830464, x <<= (tmp = -2445932551.1762686, tmp));
-  assertEquals(318767104, x >>>= (tmp = -2465332061.628887, tmp));
-  assertEquals(301989888, x &= (-2771167302.022801));
-  assertEquals(301989888, x |= x);
-  assertEquals(37748736, x >>= (tmp = -835820125, tmp));
-  assertEquals(1474977371, x ^= (tmp = -2857738661.6610327, tmp));
-  assertEquals(470467500, x += (-1004509871));
-  assertEquals(0.30466562575942585, x /= (((tmp = 1515955042, tmp)<<(x+((1607647367)-(tmp = 1427642709.697169, tmp))))^x));
-  assertEquals(1.0348231148499734e-10, x /= (tmp = 2944132397, tmp));
-  assertEquals(0, x >>= (x>>>(tmp = -2847037519.569043, tmp)));
-  assertEquals(NaN, x /= x);
-  assertEquals(0, x >>>= (-1817784819.9058492));
-  assertEquals(0, x >>= x);
-  assertEquals(-0, x *= ((tmp = -1387748473, tmp)|(x+(352432111))));
-  assertEquals(-0, x *= (((-2591789329)/(tmp = -2144460203, tmp))>>(tmp = -568837912.5033123, tmp)));
-  assertEquals(0, x <<= (-2963600437.305708));
-  assertEquals(0, x &= ((588720662)>>>x));
-  assertEquals(1561910729, x += (1561910729));
-  assertEquals(0, x ^= x);
-  assertEquals(-0, x *= (-2722445702));
-  assertEquals(0, x &= (tmp = -2738643199.732308, tmp));
-  assertEquals(0, x /= (((1859901899.227291)>>>((tmp = -1067365693, tmp)+((-1975435278)|x)))|((1844023313.3719304)&(tmp = -624215417.0227654, tmp))));
-  assertEquals(NaN, x %= x);
-  assertEquals(NaN, x %= (-2852766277));
-  assertEquals(0, x <<= (-1482859558));
-  assertEquals(0, x >>= x);
-  assertEquals(-1196775786, x += (tmp = -1196775786, tmp));
-  assertEquals(-68176201, x |= ((tmp = 2336517643, tmp)+x));
-  assertEquals(0, x ^= x);
-  assertEquals(0, x <<= x);
-  assertEquals(0, x >>= (2969141362.868086));
-  assertEquals(NaN, x %= x);
-  assertEquals(0, x >>= ((x-((((tmp = -905994835, tmp)|(tmp = 2850569869.33876, tmp))<<((-2405056608.27147)>>(tmp = 1280271785, tmp)))&(-1942926558)))*(tmp = 707499803.177796, tmp)));
-  assertEquals(0, x &= ((-697565829.8780258)+((2978584888.549406)%x)));
-  assertEquals(0, x >>= (748642824.4181392));
-  assertEquals(0, x += x);
-  assertEquals(0, x >>>= (-1701028721));
-  assertEquals(92042539, x -= ((-92042539)|(x*(x%(-293705541.00228095)))));
-  assertEquals(0, x %= x);
-  assertEquals(0, x >>= x);
-  assertEquals(0, x %= (-2278672472.458228));
-  assertEquals(0, x %= (((-2374117528.0359464)/((tmp = -2809986062, tmp)|(tmp = 895734980, tmp)))&(tmp = 1564711307.41494, tmp)));
-  assertEquals(0, x >>>= x);
-  assertEquals(0, x += x);
-  assertEquals(-0, x /= ((tmp = -2749286790.3666043, tmp)<<(x^(-2966741582.324482))));
-  assertEquals(0, x *= x);
-  assertEquals(0, x >>>= x);
-  assertEquals(-1882562314, x ^= (2412404982.782115));
-  assertEquals(-806620, x %= (((tmp = 1527219936.5232096, tmp)*(-1139841417))>>>(tmp = 201632907.3236668, tmp)));
-  assertEquals(-1613240, x += x);
-  assertEquals(-1664766177387640, x *= (1031939561));
-  assertEquals(-9.478083550117849e+23, x *= (tmp = 569334221.1571662, tmp));
-  assertEquals(-8.462574598319509e+21, x /= ((x-(tmp = -2985531211.114498, tmp))>>(tmp = 174615992.91117632, tmp)));
-  assertEquals(1638924288, x <<= (((((x>>((-1823401733.4788911)+((tmp = 1362371590, tmp)>>>x)))^(tmp = -56634380, tmp))/(tmp = 2387980757.1540084, tmp))%((((tmp = -3175469977, tmp)^(tmp = -1816794042, tmp))+(232726694))*(tmp = 822706176, tmp)))/(tmp = 1466729893.836311, tmp)));
-  assertEquals(2686072821796307000, x *= x);
-  assertEquals(-1007977445.9812208, x /= (-2664814408.800125));
-  assertEquals(-1007977445, x &= x);
-  assertEquals(322314656346249100, x *= (tmp = -319763758.54942775, tmp));
-  assertEquals(197436885.26815608, x /= (tmp = 1632494637, tmp));
-  assertEquals(-67191339, x |= ((-399580815.1746769)/((1335558363)/(tmp = 224694526, tmp))));
-  assertEquals(1229588737, x &= (tmp = 1296763683.5732255, tmp));
-  assertEquals(1229588737, x -= ((((1171546503)|((tmp = -2701891308, tmp)%(-2155432197.022206)))/(-306122816.85682726))>>x));
-  assertEquals(4162606632, x -= (tmp = -2933017895, tmp));
-  assertEquals(1.6487311395551163, x /= (2524733434.1748486));
-  assertEquals(-1929308648.9913044, x += (-1929308650.6400356));
-  assertEquals(-3858617297.982609, x += x);
-  assertEquals(788529152, x <<= (x^(1401824663)));
-  assertEquals(6160384, x >>>= ((((((x>>>x)>>((((x*(tmp = -1958877151, tmp))>>>(1310891043))-(tmp = 564909413.9962088, tmp))%(-175978438)))%x)|((tmp = -1193552419.7837512, tmp)*(tmp = 1508330424.9068346, tmp)))|(1428324616.3303494))-((1828673751)/(tmp = 1281364779, tmp))));
-  assertEquals(6160384, x |= x);
-  assertEquals(1, x /= x);
-  assertEquals(1, x &= (tmp = -855689741, tmp));
-  assertEquals(0, x >>>= x);
-  assertEquals(-1088569655.3528988, x -= (tmp = 1088569655.3528988, tmp));
-  assertEquals(-1088569655, x >>= ((tmp = 2429646226.626727, tmp)<<((-1539293782.4487276)>>(x^((tmp = 1140855945.537702, tmp)+x)))));
-  assertEquals(-311, x %= ((x/x)<<x));
-  assertEquals(1.2007722007722008, x /= (x|(tmp = 448796341.87655175, tmp)));
-  assertEquals(3, x |= (x+x));
-  assertEquals(-9.32416092168023e-10, x /= (-3217447688));
-  assertEquals(0, x >>= (615837464.0921166));
-  assertEquals(0, x >>>= (tmp = -2993750670.683118, tmp));
-  assertEquals(0, x >>>= (x%x));
-  assertEquals(1610612736, x ^= ((-1322905256.6770213)<<(-2567950598)));
-  assertEquals(1693676493, x ^= (83063757.63660407));
-  assertEquals(-758030371, x ^= (tmp = -1239274480, tmp));
-  assertEquals(-758030371, x %= (tmp = 1961339006, tmp));
-  assertEquals(-1509754528, x ^= (tmp = 1960027837, tmp));
-  assertEquals(-1509754528, x <<= x);
-  assertEquals(-1509754528, x -= (((tmp = -50690205.33559728, tmp)/((tmp = -1364565380, tmp)<<(tmp = 2585052504, tmp)))<<(tmp = -2356889596, tmp)));
-  assertEquals(1, x >>>= (-3204164321));
-  assertEquals(1, x *= x);
-  assertEquals(1114370230.591965, x *= ((tmp = 1114370229.591965, tmp)+x));
-  assertEquals(-4.886305275432552, x /= ((-228059887.33344483)%(2841553631.3685856)));
-  assertEquals(2.358309397373389e-9, x /= (((x*(tmp = 203428818.08174622, tmp))&(x-(((510438355)*x)+x)))+x));
-  assertEquals(0, x >>>= ((tmp = 1444810010, tmp)&(tmp = -3135701995.2235208, tmp)));
-  assertEquals(0, x /= (1865982928.6819582));
-  assertEquals(0, x *= x);
-  assertEquals(2078726016.3772051, x -= (tmp = -2078726016.3772051, tmp));
-  assertEquals(1580337898, x ^= ((tmp = -2714629398.447015, tmp)^x));
-  assertEquals(1268363034, x -= ((x+((tmp = 1144068248.3834887, tmp)&(-954104940.155973)))<<(tmp = 1270573731.7828264, tmp)));
-  assertEquals(1744830464, x <<= (((1444869551.7830744)>>>((((x+(tmp = -904688528, tmp))<<x)-((tmp = 121151912.85873199, tmp)/(tmp = -2414150217.66479, tmp)))|(((-472906698)|(3215236833.8417764))+(907737193.9056952))))-((x&(-732223723))|(-221800427.7392578))));
-  assertEquals(717338523283226600, x *= (x^(tmp = -2407450097.0604715, tmp)));
-  assertEquals(402653184, x >>= ((-3191405201.168252)*((tmp = -1941299639.695196, tmp)|(((x>>(((3215741220)>>>x)/(x+x)))^(((tmp = -2144862025.9842231, tmp)|((tmp = -1966913385, tmp)&x))%x))*((tmp = -1124749626.6112225, tmp)/(tmp = 837842574, tmp))))));
-  assertEquals(402653184, x &= ((x|x)>>x));
-  assertEquals(134217728, x &= ((2720231644.3849487)*x));
-  assertEquals(134217726.75839183, x -= ((2438054684.738043)/(((((-984359711)*(x|((tmp = 177559682, tmp)^x)))/(-1253443505))/((2727868438.416792)*(x+((x<<(((tmp = 3023774345, tmp)&(-705699616.0846889))/x))<<x))))^(1963626488.548761))));
-  assertEquals(1, x /= x);
-  assertEquals(245781494, x += ((tmp = 2551445099, tmp)^(2528486814)));
-  assertEquals(-1474427807, x ^= (-1497868393.342241));
-  assertEquals(-1057271682, x += ((((((x>>x)%(-1556081693))|(x/(((1166243186.6325684)-(((tmp = 2870118257.1019487, tmp)/(x+(-69909960)))^(2270610694.671496)))/((1463187204.5849519)-x))))-x)-(x<<(-3077313003)))%x));
-  assertEquals(-1065725846, x &= ((tmp = -1808223767, tmp)|(-481628214.3871765)));
-  assertEquals(-1065725846, x ^= (x&(((tmp = -1785170598, tmp)-(tmp = -2525350446.346484, tmp))/((((((-1783948056)^(tmp = 3027265884.41588, tmp))|((((tmp = 2195362566.2237773, tmp)<<(-2919444619))<<((tmp = -2507253075.2897573, tmp)^(x^((tmp = 1067516137, tmp)+((667737752)^(x*(tmp = -1187604212.7293758, tmp)))))))%(-617406719.5140038)))*(tmp = 511060465.6632478, tmp))*((tmp = 2580189800.752836, tmp)|((((tmp = 2357895660, tmp)%((-814381220)*(x-((x>>>(((x<<x)<<(tmp = 1919573020, tmp))-x))>>>((-2756011312.136148)>>(tmp = -1603458856, tmp))))))/((tmp = -1609199312, tmp)&(-3127643445)))%x)))<<(-2261731798)))));
-  assertEquals(1.6020307924030301, x /= (tmp = -665234308.2628405, tmp));
-  assertEquals(-1120020556.697667, x *= (tmp = -699125486.2321637, tmp));
-  assertEquals(-215875188, x -= (((((tmp = -1307845034, tmp)>>>((((-2820720421)^x)-(((x<<x)|(tmp = -3042092997.57406, tmp))+(((-1294857544)+((tmp = -668029108.1487186, tmp)>>(x<<x)))^(912144065.5274727))))^(389671596.2983854)))|(-2774264897.146559))%(x-((tmp = 1378085269, tmp)^x)))+((-1659377450.5247462)&(((1613063452.834885)>>>((-344896580.0694165)>>>((-13450558)+x)))^x))));
-  assertEquals(1, x /= x);
-  assertEquals(0, x >>>= (2355750790));
-  assertEquals(1969435421.4409347, x += (1969435421.4409347));
-  assertEquals(0, x -= x);
-  assertEquals(0, x >>>= (((x*((-1022802960.6953495)<<(tmp = -2848428731.8339424, tmp)))^(-1630921485))%(1532937011)));
-  assertEquals(0, x <<= ((x+((x^(x^(tmp = 2017651860, tmp)))&(((x<<(((tmp = -1913317290.8189478, tmp)|(x-((((x%((tmp = -3035245210, tmp)+(-2270863807)))>>>((-2351852712)*(x^(-2422943296.0239563))))&((((-1578312517)%x)*x)*(-65592270.28452802)))>>>(tmp = 1104329727.2094703, tmp))))-(tmp = -1431159990.3340137, tmp)))&x)|((tmp = -2589292678.801344, tmp)&(x+((((tmp = -2557773457.456996, tmp)>>(451910805.309445))-x)>>(((tmp = -1937832765.7654495, tmp)^x)%x)))))))%x));
-  assertEquals(0, x %= (tmp = -626944459, tmp));
-  assertEquals(-732310021, x |= (tmp = -732310021, tmp));
-  assertEquals(-732310021, x |= x);
-  assertEquals(671352839, x ^= (x-((-3087309090.7153115)|x)));
-  assertEquals(134479872, x &= (tmp = 2357183984, tmp));
-  assertEquals(18084835973136384, x *= x);
-  assertEquals(0, x <<= ((1040482277)-(tmp = -357113781.82650447, tmp)));
-  assertEquals(74957, x |= ((((tmp = -70789345.7489841, tmp)%(tmp = 1415750131, tmp))&x)|((307027314)>>(2284275468))));
-  assertEquals(9, x >>>= x);
-  assertEquals(0, x &= (x&((x*((x*(x%x))%(x>>x)))/x)));
-  assertEquals(-1872875060, x |= (2422092236.6850452));
-  assertEquals(9, x >>>= (-382763684));
-  assertEquals(4608, x <<= x);
-  assertEquals(40.480234260614935, x /= (((((((tmp = 814638767.5666755, tmp)&((tmp = 2081507162, tmp)^(x>>>(1460148331.2229118))))&(tmp = 1187669197.7318723, tmp))<<(412000677.93339765))^((tmp = 556111951, tmp)>>(tmp = -2232569601.292395, tmp)))&(-3006386864))/x));
-  assertEquals(32, x &= (-3053435209.383913));
-  assertEquals(418357217, x ^= (418357185));
-  assertEquals(204275, x >>= ((-1188650337.9010527)^((51494580)%(-2544545273))));
-  assertEquals(982392804, x += (((x+(((tmp = -982596937.9757051, tmp)+x)%(-2298479347)))^((((tmp = 1610297674.0732534, tmp)>>>x)*(((x>>(-2746780903.08599))&(-2376190704.247188))^(((20545353)/(tmp = 1468302977, tmp))-(x<<x))))>>(((-1434332028.0447056)/((tmp = 1983686888, tmp)&((tmp = 2324500847, tmp)%(394330230.6163173))))%(((-1129687479.2158055)+((-3127595161)*((-3066570223)&((tmp = 3192134577.4963055, tmp)/(-2697915283.3233275)))))+(-1112243977.5306559)))))|(x&(-2622725228))));
-  assertEquals(-2735750653096133600, x *= (-2784782870.9218984));
-  assertEquals(-1876329472, x |= ((((((2752866171)<<(-1681590319))/x)>>((tmp = 1451415208, tmp)>>>(1126858636.6634417)))+(((tmp = 2165569430.4844217, tmp)/x)^(((tmp = -1675421843.4364457, tmp)-(-2187743422.2866993))|x)))*x));
-  assertEquals(3520612287495799000, x *= x);
-  assertEquals(-200278016, x |= ((((-2379590931)%((((-1558827450.833285)&x)>>(-665140792))-((tmp = -445783631.05567217, tmp)+(tmp = 93938389.53113222, tmp))))/(3103476273.734701))^x));
-  assertEquals(-9178285062592.75, x *= ((2042671875.7211144)%(((tmp = 589269308.0452716, tmp)/x)<<(-130695915.9934752))));
-  assertEquals(60048960, x |= (x<<x));
-  assertEquals(60048960, x <<= ((((((tmp = -2793966650, tmp)/(-2882180652))&(((x<<((tmp = -384468710, tmp)+(2236162820.9930468)))>>>((((969371919)>>((tmp = -3153268403.2565875, tmp)-((((573811084)/x)^(tmp = -968372697.4844134, tmp))>>>(((-3096129189)>>x)/(tmp = 830228804.6249363, tmp)))))<<(((1243972633.3592157)|x)&((-1687610429)&(tmp = -1945063977.458529, tmp))))<<(((tmp = -217456781.37068868, tmp)-(400259171.68077815))^x)))>>>x))%(((2728450651.300167)/(((-2713666705.089135)%(tmp = 740472459, tmp))^x))|x))^x)*(-2463032364)));
-  assertEquals(60048960, x %= (tmp = -442107222.9513445, tmp));
-  assertEquals(-1573781504, x <<= (960581227));
-  assertEquals(1297, x >>>= (tmp = -1692919563, tmp));
-  assertEquals(1297, x &= x);
-  assertEquals(-3113308397155.233, x *= (tmp = -2400391979.3024154, tmp));
-  assertEquals(-3115513013486.233, x -= (2204616331));
-  assertEquals(-3113809649082.233, x -= (-1703364404));
-  assertEquals(0, x >>>= (((-1181206665)-(550946816.586771))|(tmp = -2346300456, tmp)));
-  assertEquals(0, x %= (tmp = 1649529739.2785435, tmp));
-  assertEquals(0, x ^= ((tmp = -2452761827.2870226, tmp)%(((1090281070.5550141)/(tmp = 992149154.6500508, tmp))*(x<<((((((x>>>x)|((tmp = -2410892363, tmp)%(tmp = 2585150431.0231533, tmp)))/x)*(tmp = 1541294271, tmp))+x)&((97566561.77126992)&((((-640933510.1287451)&(((((x>>>((-1821077041)<<((tmp = -1138504062.093695, tmp)-(tmp = -181292160, tmp))))%x)-(x>>((x&(((tmp = 1067551355, tmp)/(x|(1004837864.8550552)))&(x-(-103229639.25084043))))&((tmp = 2064184671.210937, tmp)+((((tmp = -2245728052, tmp)|(1538407002.8365717))+(x<<((x>>((76549490)/(tmp = 628901902.6084052, tmp)))<<((x<<x)^(-1907669184)))))+(-1409123688))))))>>>((((-1911547456.933543)-((-512313175)+((tmp = -2620903017, tmp)^(tmp = 2148757592.244808, tmp))))<<((-1740876865)>>>x))+((tmp = 691314720.9488736, tmp)<<(614057604.4104803))))|(x^((tmp = -3040687.291528702, tmp)/(x^(((x+(-2899641915))^((tmp = -1220211746, tmp)/x))%x))))))^(tmp = 119850608, tmp))%(2091975696))))))));
-  assertEquals(291273239, x -= (tmp = -291273239, tmp));
-  assertEquals(2206394018, x += (1915120779));
-  assertEquals(235641480, x <<= (x&(x&(-1810963865.1415658))));
-  assertEquals(28764, x >>= ((tmp = -1927011875, tmp)^((tmp = -1986461808, tmp)|((-868139264.8399222)*((421956566)%(3068424525))))));
-  assertEquals(-99780626900900, x *= ((tmp = -1512869526.3223472, tmp)+(tmp = -1956071751, tmp)));
-  assertEquals(51218520, x &= (((-2353401311)>>>x)-(2216842509)));
-  assertEquals(51218520, x >>>= ((tmp = -1534539302.6990812, tmp)<<x));
-  assertEquals(-2147483648, x <<= (-292608644));
-  assertEquals(-2147483648, x |= ((((((x<<((-2981292735)-x))>>((tmp = 2540545320.96558, tmp)&(tmp = -2343790880, tmp)))>>>((((((x^((-172697043.94487858)/((2627260337)>>(2879112814.1247935))))&(tmp = 3000943191, tmp))<<(tmp = 1094830905, tmp))-x)>>>x)>>((((tmp = 3095796200, tmp)^(x|(tmp = 1460377694, tmp)))<<(x^(tmp = -357546193, tmp)))/((2729539495)>>x))))%(tmp = 268894171.74961245, tmp))|(x>>(tmp = 2735650924, tmp)))/(-2197885357.09768)));
-  assertEquals(-2147483648, x |= x);
-  assertEquals(-1967162776824578000, x *= (tmp = 916031551, tmp));
-  assertEquals(-2147483648, x &= x);
-  assertEquals(-457743917756973060, x *= (tmp = 213153622, tmp));
-  assertEquals(0, x >>>= ((((tmp = 2930076928.480559, tmp)+(x^x))<<(tmp = -1349755597.1280541, tmp))|(x+(2865632849))));
-  assertEquals(0, x <<= ((x>>x)-(x>>(-2629977861))));
-  assertEquals(0, x <<= x);
-  assertEquals(NaN, x /= x);
-  assertEquals(0, x |= x);
-  assertEquals(0, x >>>= x);
-  assertEquals(749327478, x |= ((tmp = 749327478, tmp)^(x>>(tmp = 881107862, tmp))));
-  assertEquals(1897869364, x += (1148541886));
-  assertEquals(463347, x >>>= (tmp = -726431220, tmp));
-  assertEquals(-395990542, x += (-396453889));
-  assertEquals(-2824792585.1675367, x -= (2428802043.1675367));
-  assertEquals(-2147483648, x <<= (tmp = -1420072385.9175675, tmp));
-  assertEquals(8388608, x >>>= (-2211390680.488455));
-  assertEquals(8388608, x >>= (((x/(x|(((x^(((tmp = -2175960170.8055067, tmp)|((tmp = -1964957385.9669886, tmp)/(tmp = -475033330, tmp)))&((x|((tmp = 1386597019.2014387, tmp)>>((tmp = -2406589229.8801174, tmp)+x)))<<(tmp = -844032843.8415492, tmp))))>>(x^x))|x)))-((x&((tmp = 1858138856, tmp)*(-3156357504)))%x))<<(((2046448340)+x)/(-2645926916))));
-  assertEquals(8359470765396279, x *= ((tmp = 871437183.7888144, tmp)-(-125089387.17460155)));
-  assertEquals(0, x ^= x);
-  assertEquals(-303039014, x += ((tmp = -2475713214, tmp)|(-372871718.2343409)));
-  assertEquals(2655126577, x -= (-2958165591));
-  assertEquals(1830332793, x ^= (tmp = -212161208, tmp));
-  assertEquals(1830332793, x ^= (((2352454407.0126333)<<((((tmp = 3083552367, tmp)/x)-(-1243111279))-((tmp = -1669093976, tmp)%(((-757485455)-(tmp = -116051602, tmp))<<x))))>>(((((-2235071915.9536905)>>(tmp = -1284656185, tmp))-x)>>((-1807028069.7202528)>>>((x%((tmp = -3070857953.311804, tmp)+((tmp = 2759633693.441942, tmp)%((169489938)*(-1582267384)))))<<(x^((tmp = -787578860, tmp)<<x)))))>>((x/(x|(409464362)))-(tmp = -64033017, tmp)))));
-  assertEquals(397605933.90319204, x %= (tmp = 716363429.548404, tmp));
-  assertEquals(186400, x &= (((x%(-1745754586))>>>x)<<(x&(x&((-2163627752)-((1784050895)+(((-2864781121.899456)>>>x)&x)))))));
-  assertEquals(186400, x %= (tmp = -423209729, tmp));
-  assertEquals(186400, x <<= ((x<<(x+(1232575114.4447284)))*x));
-  assertEquals(1386299, x ^= ((tmp = -1074209615, tmp)>>>(x>>>((tmp = -1456741008.2654872, tmp)>>((1724761067)>>(-2016103779.9084842))))));
-  assertEquals(347302967.20758367, x -= (-345916668.20758367));
-  assertEquals(1.9325619389304094, x /= (179711170.03359854));
-  assertEquals(-3703324711.628227, x *= (tmp = -1916277371, tmp));
-  assertEquals(-920980517031624800, x *= (tmp = 248690187.53332615, tmp));
-  assertEquals(0, x &= (((tmp = -2753945953.082594, tmp)*x)-(172907186)));
-  assertEquals(-0, x /= (((((-2744323543.187253)>>((tmp = 2663112845, tmp)>>(((-121791600)+(x^x))*(2758944252.4214177))))|x)/(tmp = -2746716631.6805267, tmp))-x));
-  assertEquals(0, x ^= ((tmp = 983113117, tmp)&((2638307333)+((((tmp = 3076361304.56189, tmp)<<(-2663410588.5895214))%((-1109962112)-(tmp = -2381021732, tmp)))%((tmp = 410559095, tmp)&x)))));
-  assertEquals(0, x <<= (tmp = 1510895336.5111506, tmp));
-  assertEquals(0, x <<= (tmp = -1688348296.2730422, tmp));
-  assertEquals(2269471424, x -= (-2269471424));
-  assertEquals(-2022580224, x ^= (x%((tmp = 160999480.21415842, tmp)&x)));
-  assertEquals(-2077171712, x &= (tmp = 3032415014.3817654, tmp));
-  assertEquals(270727, x >>>= (2973489165.1553965));
-  assertEquals(270727, x |= x);
-  assertEquals(-1895894537, x |= ((tmp = -1895903118.129186, tmp)|x));
-  assertEquals(-1895894537, x -= ((((((((3143124509)>>>(-2866190144.8724117))*((x>>((961021882)*(tmp = 2363055833.8634424, tmp)))/((2032785518)+((2713643671.3420825)>>((-447782997.0173557)*((tmp = 1174918125.3178625, tmp)*((((tmp = -541539365.548115, tmp)%(-359633101))|(1765169562.2880063))+(tmp = -2512371966.374508, tmp))))))))/x)>>(x*((((-847238927.6399388)&(857288850))%(-2427015402))^((2221426567)%(x+x)))))>>>x)<<((tmp = 2009453564.2808268, tmp)>>((2924411494)<<(x>>(tmp = -1240031020.8711805, tmp)))))%(tmp = 3118159353, tmp)));
-  assertEquals(0, x ^= x);
-  assertEquals(0, x %= (-30151583));
-  assertEquals(-1035186736, x ^= ((tmp = -517593368, tmp)<<(tmp = 3216155585, tmp)));
-  assertEquals(49740, x >>>= x);
-  assertEquals(49740, x %= (640223506));
-  assertEquals(388, x >>>= ((x>>(tmp = 3161620923.50496, tmp))+(2605183207)));
-  assertEquals(776, x += x);
-  assertEquals(-97905, x ^= ((((((tmp = 145447047.8783008, tmp)^(((x>>>(tmp = 3014858214.2409887, tmp))>>>(629911626.132971))>>(((x+((369309637.229408)-x))<<(-2661038814.9204755))*(x+(x%(3025191323.4780884))))))+x)*(-482550691))|(-632782135))/x));
-  assertEquals(-97905, x %= ((((-492914681)-((-2508632959.269368)&(tmp = 1209318291, tmp)))>>(-723512989.459533))>>>(((-528429623.985692)&(x^(tmp = -925044503, tmp)))-(-1696531234))));
-  assertEquals(9585389025, x *= x);
-  assertEquals(-715425728, x <<= ((583763091)<<(-1223615295)));
-  assertEquals(-520093696, x <<= ((tmp = -1891357699.671592, tmp)*(((tmp = 3206095739.5163193, tmp)+(-2908596651.798733))>>>((tmp = -2820415686, tmp)>>(x|((((tmp = -566367675.6250327, tmp)*(-959117054))>>((((-187457085.89686918)*x)*(tmp = -2394776877.5373516, tmp))>>>x))|(((tmp = 80478970.46290505, tmp)<<(tmp = 2173570349.493097, tmp))-(x/((-2896765964)-((x/((tmp = 198741535.7034216, tmp)%(436741457)))%(tmp = 2936044280.0587225, tmp)))))))))));
-  assertEquals(-2520.5909527086624, x /= ((211290893.06029093)>>(663265322)));
-  assertEquals(-2520.5909527086624, x %= (x^((1057915688)<<(tmp = 1914820571.1142511, tmp))));
-  assertEquals(1, x >>>= (((894963408.7746166)+(tmp = -2888351666, tmp))|x));
-  assertEquals(-1989841636629996300, x += ((1424670316.224575)*((-2144149843.0876865)|((((421479301.0983993)|((3082651798)^(tmp = -271906497, tmp)))>>x)+((tmp = -178372083, tmp)%x)))));
-  assertEquals(17935384255.088326, x /= (((((((tmp = 1168194849.2361898, tmp)>>>(-107316520.53815603))>>>(x^(((x%((x>>>(((-2456622387)/x)&((2124689803)|(((-1130151701)^(2796315158))>>x))))-((-884686033.5491502)>>>((-2371185318.5358763)&x))))+(tmp = 558422989, tmp))|((tmp = -420359120.0596726, tmp)/((-1820568437.0587764)&(2298602280.266465))))))>>(x-((tmp = -1164568978, tmp)^x)))^x)-x)+x));
-  assertEquals(134233150, x &= ((x>>(((tmp = 98498118.13041973, tmp)-(804574397))/(tmp = -1564490985.7904541, tmp)))+x));
-  assertEquals(4, x >>= (449610809));
-  assertEquals(1912543790, x |= (1912543790));
-  assertEquals(2487274263, x += (tmp = 574730473, tmp));
-  assertEquals(-2140759118, x ^= (tmp = 338055333.9701035, tmp));
-  assertEquals(311607367, x += (2452366485));
-  assertEquals(9509, x >>= (372113647.84365284));
-  assertEquals(-2001075684.1562128, x += (-2001085193.1562128));
-  assertEquals(-638703280, x ^= (((tmp = 1096152237, tmp)&x)|((2707404245.0966487)-(((tmp = 1550233654.9691348, tmp)+(tmp = 2008619647, tmp))&((tmp = -2653266325, tmp)+(tmp = -280936332, tmp))))));
-  assertEquals(-101811850, x |= (-2250090202));
-  assertEquals(-13, x >>= ((-561312810.0218933)|(tmp = 79838949.86521482, tmp)));
-  assertEquals(-13, x >>= ((tmp = -936543584, tmp)/(1180727664.1746705)));
-  assertEquals(-1547, x *= (((tmp = 1005197689, tmp)>>>x)>>>(tmp = 34607588, tmp)));
-  assertEquals(2393209, x *= x);
-  assertEquals(2393209, x |= x);
-  assertEquals(0, x >>= (-2691279235.1215696));
-  assertEquals(0, x *= (((896175510.4920144)*((((tmp = 1770236555.7788959, tmp)%(537168585.7310632))/x)&(tmp = 1094337576, tmp)))&(((x-x)-x)>>x)));
-  assertEquals(-1922620126, x ^= (-1922620126));
-  assertEquals(3.43481396325761, x /= (tmp = -559745053.6088333, tmp));
-  assertEquals(0, x >>= x);
-  assertEquals(0, x >>>= (tmp = 2106956255.6602135, tmp));
-  assertEquals(-1339003770, x ^= ((tmp = 2955963526.960022, tmp)+x));
-  assertEquals(-0, x *= ((((tmp = 368669994, tmp)>>>(x*x))<<(tmp = 2355889375, tmp))&(tmp = -2267550563.9174895, tmp)));
-  assertEquals(0, x >>= (753848520.8946902));
-  assertEquals(0, x >>>= x);
-  assertEquals(0, x %= ((tmp = -2872753234.2257266, tmp)|x));
-  assertEquals(NaN, x %= (x>>>(tmp = 890474186.0898918, tmp)));
-  assertEquals(NaN, x %= ((tmp = 1341133992.284471, tmp)&(tmp = -2979219283.794898, tmp)));
-  assertEquals(NaN, x += (-2865467651.1743298));
-  assertEquals(NaN, x += ((-1424445677)%(x^(tmp = 1150366884, tmp))));
-  assertEquals(0, x &= (x+((tmp = 1499426534, tmp)+x)));
-  assertEquals(0, x |= (((((tmp = -2413914642, tmp)<<((x>>>x)^(1218748804)))+((((-1085643932.2642736)-(-1199134221.533854))>>(tmp = 2148778719, tmp))-((tmp = 1589158782.0040946, tmp)/(tmp = -2485474016.1575155, tmp))))>>>(x>>x))/(2230919719)));
-  assertEquals(0, x %= ((tmp = -2576387170.517563, tmp)>>>((tmp = -2362334915.919525, tmp)>>>(((3096453582)-(700067891.4834484))^(2396394772.9253683)))));
-  assertEquals(-1798103432, x ^= (((((tmp = 2396144191, tmp)*(x>>>(1512158325)))&(((-1256228298.5444434)&(((-2963136043.434966)&((tmp = 2472984854, tmp)+(tmp = -454900927, tmp)))%(tmp = 484255852.65332687, tmp)))>>((x%x)-x)))&(tmp = 929723984, tmp))^(tmp = -1798103432.5838807, tmp)));
-  assertEquals(-2137913344, x &= ((((x|(-2970116473))&(((x/x)/((tmp = 2853070005, tmp)>>>x))%(((tmp = -3123344846, tmp)/((2224296621.6742916)-(tmp = -2246403296.455411, tmp)))+((x&(((x^(x*(2829687641)))+x)&(tmp = 988992521, tmp)))^x))))<<((((-820608336)^(tmp = 2851897085, tmp))>>(tmp = -402427624, tmp))>>>x))-(((x*(((-2287402266.4821453)%(tmp = -520664172.1831205, tmp))^(x/(1875488837))))<<(tmp = 402393637, tmp))&(tmp = 1576638746.3047547, tmp))));
-  assertEquals(-2827557853031924000, x *= (tmp = 1322578326.6507945, tmp));
-  assertEquals(6.424459501778244e+27, x *= (tmp = -2272087729.3065624, tmp));
-  assertEquals(-1586887483, x |= (-1586887483));
-  assertEquals(-567868980691736100, x *= (tmp = 357850816, tmp));
-  assertEquals(1489101591, x ^= (x%(x|(421921075))));
-  assertEquals(-801213804822328000, x *= (x|(-672326904.6888077)));
-  assertEquals(612257233.6612054, x /= (((tmp = -350127617, tmp)>>>(-1140467595.9752212))<<((x^x)+(-3117914887))));
-  assertEquals(19097.231243331422, x /= ((x^(tmp = -570012517, tmp))>>>x));
-  assertEquals(0, x >>= ((x%(((-2347648358)%((x-(tmp = -456496327, tmp))|(x^(-1977407615.4582832))))<<(x/(tmp = -2021394626.214082, tmp))))%(tmp = -949323000.2442119, tmp)));
-  assertEquals(0, x <<= x);
-  assertEquals(NaN, x %= (x^(x>>(((tmp = 597147546.7701412, tmp)&(((((-972400689.6267757)|(tmp = -2390675341.6367044, tmp))|(tmp = 1890069123.9831812, tmp))<<(((1606974563)-(tmp = -2211617255.8450356, tmp))&((((x+((2433096953)&(-2527357746.681596)))*(tmp = -313956807.55609417, tmp))|((tmp = -2146031047.968496, tmp)/(tmp = 2851650714.68952, tmp)))>>(((tmp = 2630692376.6265225, tmp)-(tmp = -3162222598, tmp))>>((tmp = 1915552466, tmp)*(x>>>(-2413248225.7536864)))))))&(x%((((1218471556)|x)+(tmp = -849693122.6355379, tmp))+x))))>>>(x/((tmp = 689889363, tmp)/x))))));
-  assertEquals(0, x >>>= (45649573.23297));
-  assertEquals(0, x >>>= (tmp = 1084439432.771266, tmp));
-  assertEquals(NaN, x /= x);
-  assertEquals(NaN, x *= (tmp = 1642750077, tmp));
-  assertEquals(0, x >>>= (tmp = -1944001182.0778434, tmp));
-  assertEquals(1682573000, x |= (tmp = -2612394296.2858696, tmp));
-  assertEquals(3041823595, x -= (((tmp = 720576773, tmp)|(x^(-1068335724.2253149)))>>(x*(-2501017061))));
-  assertEquals(6083647190, x += x);
-  assertEquals(-6536258988089986000, x *= ((tmp = 632312939.6147232, tmp)|((-1621821634)+(((tmp = -2281369913.562131, tmp)&((tmp = -381226774, tmp)|x))&(664399051)))));
-  assertEquals(4.272268155938712e+37, x *= x);
-  assertEquals(733271152, x %= (-1345127171));
-  assertEquals(847089925, x ^= (tmp = 432620917.57699084, tmp));
-  assertEquals(1337073824, x <<= x);
-  assertEquals(-25810602, x ^= (tmp = 2982414838, tmp));
-  assertEquals(-25282209, x |= ((tmp = -2927596922, tmp)>>>(-2404046645.01413)));
-  assertEquals(639190091919681, x *= x);
-  assertEquals(173568320, x &= ((((tmp = -718515534.4119437, tmp)&(tmp = 2989263401, tmp))<<x)|((tmp = 537073030.5331153, tmp)-(tmp = 883595389.314624, tmp))));
-  assertEquals(0, x -= x);
-  assertEquals(0, x >>>= (tmp = -1844717424.917882, tmp));
-  assertEquals(0, x >>= (tmp = -462881544.2225325, tmp));
-  assertEquals(0, x >>= x);
-  assertEquals(-1868450038, x ^= (2426517258.6111603));
-  assertEquals(1, x /= x);
-  assertEquals(1175936039.4202638, x += (tmp = 1175936038.4202638, tmp));
-  assertEquals(-127916015, x ^= ((x/(1841969600.3012052))-(tmp = 1099467723, tmp)));
-  assertEquals(395713785658171900, x *= (-3093543726));
-  assertEquals(395713787128560900, x += (((((-717204758)*(tmp = -588182129.6898501, tmp))-x)+(tmp = 20638023, tmp))^x));
-  assertEquals(-962609355, x |= ((x^(-3118556619.912983))<<((tmp = 876126864, tmp)&x)));
-  assertEquals(-962609355, x %= (tmp = -2079049990, tmp));
-  assertEquals(-114583755, x -= (((-2806715240)&(((1961136061.0329285)>>>((2087162059)*x))+((tmp = -1890084022.7631018, tmp)%(tmp = 2137514142.358262, tmp))))+(x<<(tmp = 2991240918, tmp))));
-  assertEquals(-425721856, x <<= x);
-  assertEquals(3778560, x >>>= ((x|(3198503572))>>(1158434541.1099558)));
-  assertEquals(3778560, x %= (tmp = -2592585378.9592104, tmp));
-  assertEquals(624640, x &= (tmp = 2261638192.9864054, tmp));
-  assertEquals(1249280, x += x);
-  assertEquals(1048576, x &= ((tmp = -2144301819.9892588, tmp)^((x-x)<<x)));
-  assertEquals(2097152, x <<= (x/x));
-  assertEquals(5069061551149729, x *= (tmp = 2417116904.8069615, tmp));
-  assertEquals(1.4836296666029616e+25, x += ((tmp = 2926833006.7121572, tmp)*x));
-  assertEquals(-256, x >>= ((-469330345.3589895)%((x^(((2554170843.4978285)/(2495676674.815263))>>>x))*(-918892963))));
-  assertEquals(-134217728, x <<= (x|(((((1687450853.1321645)+(tmp = 2369533014.5803776, tmp))+(tmp = -2613779445, tmp))+(tmp = -2488826226.3733397, tmp))>>(tmp = -220646936.41245174, tmp))));
-  assertEquals(704164545131708400, x *= ((-2632786741)+(-2613647956)));
-  assertEquals(9216, x >>>= (-1925405359.657349));
-  assertEquals(4491403261551.008, x *= (tmp = 487348444.1787118, tmp));
-  assertEquals(4490606381829.008, x -= (tmp = 796879722, tmp));
-  assertEquals(-60294056, x >>= x);
-  assertEquals(-3193966580.494005, x += (tmp = -3133672524.494005, tmp));
-  assertEquals(550500358, x >>>= ((tmp = -2779637628.390116, tmp)-((tmp = 29230786.984039664, tmp)%(tmp = -310649504.7704866, tmp))));
-  assertEquals(68812544, x >>= (-1347584797));
-  assertEquals(1.2120221595741834e-11, x /= ((2791020260)*((((1964870148.6358237)^x)|(-3082869417))-((x^x)&((1234292117.8790703)<<(-1792461937.2469518))))));
-  assertEquals(1.2120221595741834e-11, x %= (x-(2780439348)));
-  assertEquals(-1421552183, x |= (tmp = -1421552183.5930738, tmp));
-  assertEquals(-1420954119, x |= ((((-2547788562.5735893)<<x)%(435385623))>>(x|x)));
-  assertEquals(1, x /= x);
-  assertEquals(1, x >>= (x>>>(((2975715011.501709)-(tmp = -1473273552.981069, tmp))/(1654883913.042487))));
-  assertEquals(-65382, x ^= ((x/((tmp = -2780026200, tmp)<<x))^(((-2683084424)<<x)>>(-1716245874))));
-  assertEquals(1530921106, x &= (1530940914));
-  assertEquals(1, x /= x);
-  assertEquals(0, x >>= x);
-  assertEquals(0, x /= (tmp = 773741434.1972584, tmp));
-  assertEquals(0, x |= x);
-  assertEquals(0, x <<= (-67977514.99888301));
-  assertEquals(0, x %= (2496550482.524729));
-  assertEquals(-0, x /= (tmp = -515040417, tmp));
-  assertEquals(0, x <<= (-1673460935.2858837));
-  assertEquals(-2638209488, x += (-2638209488));
-  assertEquals(-2400951839498683400, x *= (910068685));
-  assertEquals(1600582036, x ^= (((-1247602308.4812562)>>(((-2393714444.179732)>>>x)%(-778140635.7165127)))+(-1933914727.2268424)));
-  assertEquals(0, x *= ((x-x)>>(-1270234575)));
-  assertEquals(0, x >>>= (tmp = 3193676327.493656, tmp));
-  assertEquals(0, x ^= (x>>>(1148676785.389884)));
-  assertEquals(0, x >>= (tmp = -2269181763.8663893, tmp));
-  assertEquals(0, x >>= (3149450221));
-  assertEquals(0, x >>= (1069630750));
-  assertEquals(-625009654, x ^= ((-2143499112)%(-759244728.6214335)));
-  assertEquals(3583943, x >>>= (-2942645558.1204453));
-  assertEquals(1791971, x >>= (x/x));
-  assertEquals(223996, x >>= x);
-  assertEquals(6999, x >>= (tmp = -1051883611.9443719, tmp));
-  assertEquals(1459617792, x <<= (-1572314984));
-  assertEquals(2622356453.269262, x -= (tmp = -1162738661.2692618, tmp));
-  assertEquals(5103676461.269262, x += (2481320008));
-  assertEquals(823989684.2692623, x %= (x^(((((1048362966)*((tmp = -2423040747.6233954, tmp)>>>x))*((tmp = 2330818588.4081, tmp)>>(tmp = 103312020.98346841, tmp)))+(tmp = 2264492857.144133, tmp))>>>((tmp = 2523442834, tmp)<<x))));
-  assertEquals(0, x >>>= (tmp = -2018700898.531027, tmp));
-  assertEquals(NaN, x /= x);
-  assertEquals(0, x <<= (tmp = -2489442223, tmp));
-  assertEquals(0, x >>= ((3045836220)>>>x));
-  assertEquals(-1156905149, x ^= (3138062147));
-  assertEquals(-0, x %= x);
-  assertEquals(-3118433907.512866, x -= ((tmp = 1338611238, tmp)-(-1779822669.5128663)));
-  assertEquals(100679693, x &= (1040565279));
-  assertEquals(10136400582574248, x *= x);
-  assertEquals(0, x %= x);
-  assertEquals(2400318405, x += (2400318405));
-  assertEquals(1.0036190808578471, x /= (((tmp = -2313492253.9889445, tmp)|(x-((tmp = -205459123, tmp)>>x)))+x));
-  assertEquals(0, x >>>= (tmp = 882343227.1675215, tmp));
-  assertEquals(0, x &= ((tmp = 2307828832.2706165, tmp)^((((((1404388047)<<((807879382)-(-2862921873)))-x)*(tmp = -1897734732, tmp))>>(tmp = 1981888881.2306776, tmp))%x)));
-  assertEquals(0, x <<= x);
-  assertEquals(0, x *= (((x*x)*((((2764801384.171454)%(x>>>x))&(384818815))+(x>>(tmp = -1481683516, tmp))))&x));
-  assertEquals(0, x >>= (tmp = -2202536436, tmp));
-  assertEquals(0, x ^= x);
-  assertEquals(0, x &= (tmp = 15161124, tmp));
-  assertEquals(-1586110900, x ^= (-1586110900));
-  assertEquals(-1586127952, x -= ((tmp = 560737212, tmp)%((1349529668)>>>(tmp = -1956656528, tmp))));
-  assertEquals(-1174945870, x -= ((1178456190)|x));
-  assertEquals(1335167624.3422346, x -= (tmp = -2510113494.3422346, tmp));
-  assertEquals(1329952126.3422346, x -= (x>>x));
-  assertEquals(1, x >>= x);
-  assertEquals(3, x |= (x<<x));
-  assertEquals(3, x -= (x-x));
-  assertEquals(-1938525669, x |= (tmp = 2356441625.5128202, tmp));
-  assertEquals(-1938525669, x ^= ((tmp = -197149141.3622346, tmp)/(2833823156)));
-  assertEquals(-2.6292393147661324, x /= (737295254.2254335));
-  assertEquals(2925975987.370761, x -= (-2925975990));
-  assertEquals(2925975987.370761, x %= (tmp = 3041184582.8197603, tmp));
-  assertEquals(-1908068660, x ^= ((tmp = -1380575181, tmp)-(2375164084.8366547)));
-  assertEquals(-477017165, x >>= (tmp = 2420877826.353099, tmp));
-  assertEquals(-477017165, x %= ((tmp = -2919204062.3683634, tmp)-(tmp = -2263328990, tmp)));
-  assertEquals(-2105539936, x &= ((tmp = -1630795440, tmp)-(x&((933423833)>>(-475069901)))));
-  assertEquals(-4979480720, x -= (tmp = 2873940784, tmp));
-  assertEquals(-4190953472, x -= (x&(tmp = -645918862.9001305, tmp)));
-  assertEquals(17564091004468855000, x *= x);
-  assertEquals(-857277134, x |= (tmp = 2363948338, tmp));
-  assertEquals(1015632515, x -= (-1872909649));
-  assertEquals(-1150380043, x ^= (tmp = -2014853770, tmp));
-  assertEquals(1607729152, x <<= ((2194449589)+(x|(tmp = -1470075256.4605722, tmp))));
-  assertEquals(1608356496, x |= ((((x|(670426524))<<((-2415862218)>>(tmp = 1572561529.9213061, tmp)))^((-1989566800.3681061)|x))&(2170270618.3401785)));
-  assertEquals(-1836056576, x <<= (tmp = 2906301296.540217, tmp));
-  assertEquals(-2952415961567723500, x *= (tmp = 1608020145, tmp));
-  assertEquals(1435500544, x <<= x);
-  assertEquals(700928, x >>>= (tmp = 2924829771.1804566, tmp));
-  assertEquals(0, x <<= ((x^(2410009094))|(((-164334714.18698573)%(x*x))|(tmp = 2182431441.2575436, tmp))));
-  assertEquals(-143321285, x ^= (tmp = -143321285, tmp));
-  assertEquals(-2, x >>= x);
-  assertEquals(-1, x >>= (x&(1109737404)));
-  assertEquals(1, x >>>= x);
-  assertEquals(0, x ^= x);
-  assertEquals(-2463707358.165766, x += (-2463707358.165766));
-  assertEquals(1831259938, x >>= (((((x-(tmp = 1359448920.5452857, tmp))%(tmp = -104541523, tmp))/((3133289055.9780197)*x))>>x)%x));
-  assertEquals(1858895646, x ^= ((tmp = 131424376, tmp)>>(tmp = -396761023, tmp)));
-  assertEquals(1, x >>= x);
-  assertEquals(-1888369021, x |= ((tmp = -2038869285.046599, tmp)^((tmp = -1318286592.4250565, tmp)-(tmp = 2825123496, tmp))));
-  assertEquals(1036458508, x <<= ((tmp = 2722401450, tmp)/((tmp = 1090712291, tmp)>>((tmp = -2155694696.9755683, tmp)*(tmp = 1661107340, tmp)))));
-  assertEquals(1, x /= (x%((tmp = -1716050484, tmp)+(tmp = -1683833551.797319, tmp))));
-  assertEquals(0, x >>= (tmp = -2899315628, tmp));
-  assertEquals(0, x |= x);
-  assertEquals(0, x >>>= x);
-  assertEquals(0, x <<= x);
-  assertEquals(1546062911, x |= (1546062911));
-  assertEquals(1546195271, x += ((tmp = -3210667091, tmp)>>(tmp = 1323121165, tmp)));
-  assertEquals(3092390542, x += x);
-  assertEquals(-1199626354, x |= (406783756));
-  assertEquals(-3650317194584908300, x *= (tmp = 3042878461.625484, tmp));
-  assertEquals(-7.650495675092354e+27, x *= (2095844078));
-  assertEquals(0, x >>= (tmp = 342617880.3384919, tmp));
-  assertEquals(22, x ^= (((tmp = 381409558.9104688, tmp)>>((2823172888.974557)>>x))>>x));
-  assertEquals(736383550, x += (736383528));
-  assertEquals(0, x %= x);
-  assertEquals(0, x += x);
-  assertEquals(-1553157831, x -= (1553157831));
-  assertEquals(1838556960, x <<= (3158944357.262641));
-  assertEquals(5503285699.188747, x *= ((tmp = 2437440276, tmp)/(814308583.8128904)));
-  assertEquals(5824889900.188747, x -= (((tmp = 1171445694, tmp)-(tmp = -1584666956, tmp))^(tmp = 1217545373, tmp)));
-  assertEquals(747032, x >>>= (-89332085));
-  assertEquals(747032, x |= (x^(x^(x>>>x))));
-  assertEquals(747032, x >>>= ((-1558482440)*((tmp = -2413907480, tmp)+(3003996862.384156))));
-  assertEquals(7.747761349084291e+23, x += ((tmp = 518064022.64624584, tmp)*((tmp = 2001951702, tmp)*x)));
-  assertEquals(0, x <<= (2769324707.5640426));
-  assertEquals(NaN, x %= (((((((-2458056470.7717686)&x)>>(tmp = -361831232.42602444, tmp))*(2611108609.6727047))>>>x)/(-1713747021.8431413))*(-1143281532)));
-  assertEquals(NaN, x %= ((x^((-613836813)*(tmp = -3180432597.0601435, tmp)))%x));
-  assertEquals(NaN, x /= ((-1607092857)^x));
-  assertEquals(0, x &= (-1190719534));
-  assertEquals(0, x >>>= x);
-  assertEquals(0, x += (x>>(642177579.1580218)));
-  assertEquals(-3129552333, x += (-3129552333));
-  assertEquals(1165414963, x &= x);
-  assertEquals(2222, x >>= (((tmp = 2606317568, tmp)|x)+(tmp = 1844107136, tmp)));
-  assertEquals(NaN, x %= ((x^x)<<(x/(((tmp = -1362148700, tmp)&((tmp = 76371048, tmp)<<x))>>>((x^(-2605741153))>>(((tmp = -2131608159.7634726, tmp)|(((2827792229.8004875)|(((-848439251)+(-2576768890.123433))|((tmp = -2617711776, tmp)-((-199980264)&((tmp = -46967951.76266599, tmp)/(-733253537))))))*(tmp = 1820087608, tmp)))>>>(tmp = -3118359396.4298744, tmp)))))));
-  assertEquals(NaN, x /= ((2144871731)*x));
-  assertEquals(NaN, x *= x);
-  assertEquals(NaN, x %= (tmp = 234811462.08692443, tmp));
-  assertEquals(0, x >>>= ((1121416685)|(x^(((tmp = -2905413334, tmp)<<(tmp = -3091554324.030834, tmp))<<x))));
-  assertEquals(-55938048, x |= ((tmp = -55938048, tmp)+(x*(tmp = -1518809027.2695136, tmp))));
-  assertEquals(-3.3234995678333864e-10, x /= (x*(tmp = -3008876576, tmp)));
-  assertEquals(0, x <<= (x/((((((-2168824234.2418427)>>(((tmp = 1976810951, tmp)%x)<<(x*(x>>(x%(3146266192))))))%(tmp = 1756971968.122397, tmp))>>>(-2859440157.8352804))/(-1001406.1919288635))>>>(-1358031926))));
-  assertEquals(-0, x *= (tmp = -1756000533, tmp));
-  assertEquals(-0, x %= (2522761446.869926));
-  assertEquals(0, x >>>= (((1087690535)>>>(2741387979))^x));
-  assertEquals(0, x -= x);
-  assertEquals(0, x >>= (-819422694.2188396));
-  assertEquals(0, x ^= x);
-  assertEquals(NaN, x /= x);
-  assertEquals(0, x &= (tmp = 86627723, tmp));
-  assertEquals(0, x += x);
-  assertEquals(0, x %= (tmp = -2317915475, tmp));
-  assertEquals(Infinity, x += (((-3072799584)^(-2487458319))/(((tmp = -3050692353, tmp)&x)>>(-777977292.8500206))));
-  assertEquals(Infinity, x += x);
-  assertEquals(Infinity, x -= (tmp = 484428269, tmp));
-  assertEquals(Infinity, x *= x);
-  assertEquals(Infinity, x /= (2059586218.2278104));
-  assertEquals(Infinity, x *= (tmp = 415918523.8350445, tmp));
-  assertEquals(-1800869091, x |= (((-1800869091)>>>(x>>>(tmp = -2832575051, tmp)))>>>x));
-  assertEquals(6196126991451132000, x *= ((-1467292383.8458765)+(-1973339154.7911158)));
-  assertEquals(6196126992684649000, x += (1233517421));
-  assertEquals(1, x /= x);
-  assertEquals(-7153809722216516000, x -= (((-2984550787.146106)<<(tmp = 743743974, tmp))*((3155151275)/((-1771412568.8965073)%x))));
-  assertEquals(-7153809721471491000, x -= (-745024056));
-  assertEquals(5.117699353102001e+37, x *= x);
-  assertEquals(0, x >>= x);
-  assertEquals(-0, x *= ((-2651785447.666973)<<(-1124902998)));
-  assertEquals(-0, x /= (2119202944));
-  assertEquals(1042673805.5205957, x -= ((x<<x)-(tmp = 1042673805.5205957, tmp)));
-  assertEquals(62, x >>>= (tmp = 2769597912.977452, tmp));
-  assertEquals(34, x &= ((tmp = -61541150, tmp)%(x^(-943160469))));
-  assertEquals(34, x ^= ((-2625482224.4605474)<<(-2277806338.3461556)));
-  assertEquals(536870912, x <<= ((-2373927426.4757633)^x));
-  assertEquals(536870912, x &= x);
-  assertEquals(512, x >>>= ((-1626769708.310139)<<((tmp = 641796314, tmp)/(721629637.3215691))));
-  assertEquals(0, x <<= (-113973033));
-  assertEquals(NaN, x /= x);
-  assertEquals(NaN, x += (-1602711788.2390788));
-  assertEquals(NaN, x *= (x%x));
-  assertEquals(0, x &= (x<<(x|(x>>((x>>>(x%((1182960050)^(((-220896609)-((((tmp = 1518275435.360103, tmp)/(tmp = -88234820, tmp))^x)/x))>>(3169930777.548236)))))-(tmp = -2912668817.662395, tmp))))));
-  assertEquals(0, x *= ((2323969408.7524366)/(((tmp = -3089229853, tmp)>>>((((tmp = -1012580544.5631487, tmp)>>(1138049418.9023373))>>x)&x))*(tmp = 626912001, tmp))));
-  assertEquals(0, x >>>= x);
-  assertEquals(NaN, x /= (x%(-868024322)));
-  assertEquals(NaN, x /= (tmp = -1749532322, tmp));
-  assertEquals(1861918711, x |= (-2433048585.853014));
-  assertEquals(1861918711, x >>= (((102451747)>>>((((241651917.47259736)/((((((((1759022236)^(tmp = -2592022722, tmp))+((-1748044969)>>>(704597925)))/(-1639604842))%((1349846853.7345295)<<(-729695861)))/(x>>((tmp = -2654474404.7365866, tmp)>>x)))>>>(((-480356478)|(x%((tmp = -1668269244.6979945, tmp)+(tmp = -2441424458.565183, tmp))))^((1634981212.7598324)>>>(tmp = 122455570.22000062, tmp))))<<x))*((tmp = -1058636137.5037816, tmp)+((2794083757.138838)&((x/(50081370))&x))))/x))/((tmp = -243106636, tmp)<<((x*((tmp = -648475219.5971704, tmp)>>((tmp = -1568913034, tmp)-((tmp = 911458615, tmp)|x))))>>>(tmp = 2714767933.920696, tmp)))));
-  assertEquals(0, x ^= x);
-  assertEquals(-2080484602, x |= (((1544771831.4758213)|x)^(-538113039)));
-  assertEquals(696451072, x <<= (tmp = -1587032689, tmp));
-  assertEquals(-162595645, x += (tmp = -859046717, tmp));
-  assertEquals(516546456, x >>>= x);
-  assertEquals(623083588, x += ((-1371850352)^(tmp = -1469933252, tmp)));
-  assertEquals(92342412, x %= (tmp = -132685294, tmp));
-  assertEquals(500272110, x |= ((tmp = 1616032506, tmp)%((tmp = 1589569590.4269853, tmp)|(-972791738.1829333))));
-  assertEquals(3247086, x %= (((tmp = 1372216208, tmp)|(-638950076.3387425))&((-2619249161.849716)&(73957896))));
-  assertEquals(0, x >>>= (tmp = -1482343462.6911879, tmp));
-  assertEquals(1265125662, x ^= (tmp = -3029841634, tmp));
-  assertEquals(4941897, x >>>= (-2039728632));
-  assertEquals(206857, x &= (tmp = 226962365.45571184, tmp));
-  assertEquals(1.0925018562586405e+24, x += ((tmp = 2687424146, tmp)*(((-1998020319)%x)*(-2080331363))));
-  assertEquals(-1.755270751212437e+32, x *= (-160665242));
-  assertEquals(0, x <<= (3152796521.6427975));
-  assertEquals(0, x ^= ((((((tmp = -855001595, tmp)<<(2007525777))-(x-(x-x)))/(3036585090.9701214))&(1827983388))*((tmp = -915604789.0515733, tmp)&(((((tmp = -806628722.7820358, tmp)%x)/(tmp = -2773117447, tmp))|x)<<(((tmp = -2902300974.7300634, tmp)|x)/(-1608133440))))));
-  assertEquals(0, x |= ((((((119024954)*(((x^(tmp = 2939514414, tmp))|x)^(x-(tmp = -1597415597.6795669, tmp))))+(((tmp = -182277816.14547157, tmp)<<(((-2983451324.3908825)^(tmp = 1572568307, tmp))+(-1165604960.8619013)))/(x>>((tmp = -2127699399, tmp)>>((x^(((((tmp = -1968667383, tmp)^(tmp = 3120052415.9964113, tmp))|(((x|(((x^((tmp = 2831505153, tmp)<<((-3150506831.547093)+((x%(tmp = 383761651, tmp))%(2856803457)))))+(((tmp = -2426953997, tmp)^(tmp = -2667954801.1010714, tmp))*(tmp = -2707801631, tmp)))&(tmp = 2082935238.794707, tmp)))^((tmp = 697573323.5349133, tmp)-x))%(tmp = 661936357, tmp)))/(-1717944600.261446))>>>((2423776015.0968056)^((-1410322010)|((x<<(tmp = 2935993226, tmp))/(tmp = -1533896392, tmp))))))*(tmp = -596675330, tmp))))))>>>(((2944268153)^(x&(144579050.93126357)))/(-2123810677.2619643)))>>>(1473040195.9009588))*x));
-  assertEquals(0, x /= (2877666495));
-  assertEquals(2174852514, x -= (tmp = -2174852514, tmp));
-  assertEquals(543713128, x >>>= x);
-  assertEquals(2978128878.939105, x += (tmp = 2434415750.939105, tmp));
-  assertEquals(3529591145844655600, x *= (tmp = 1185170719.3753138, tmp));
-  assertEquals(659, x >>>= ((((((x<<(((((-425423078)/(((tmp = 160617689.20550323, tmp)&(-1524740325.5003028))%(tmp = -1869426475, tmp)))<<(((x^(-487449247))>>>(tmp = -1962893666.7754712, tmp))%x))*x)>>((tmp = 623413085, tmp)&(x+(((((-2200726309.083274)-(x-x))+x)&(-1304849509))|((((tmp = -431896184, tmp)>>>(x>>(-1932126133)))<<((1078543321.2196498)*(-10761352)))>>(tmp = -2681391737.5003796, tmp)))))))/x)-(tmp = -1768629117, tmp))/(((((tmp = -2320718566.0664535, tmp)%x)+(-2831503351.995921))>>>(-2695416841.3578796))*(943979723)))<<x)|((652520546.7651662)>>(1045534827.6806792))));
-  assertEquals(531, x &= (tmp = -293707149, tmp));
-  assertEquals(0, x >>= (tmp = -678056747.5701449, tmp));
-  assertEquals(1184651529.8021393, x += (tmp = 1184651529.8021393, tmp));
-  assertEquals(1721719611, x |= (tmp = 1645413178, tmp));
-  assertEquals(-406880257, x |= (tmp = 2268544460, tmp));
-  assertEquals(-4194304, x <<= (tmp = -109701322.43455839, tmp));
-  assertEquals(17592186044416, x *= x);
-  assertEquals(0, x ^= (x&x));
-  assertEquals(0, x <<= (tmp = 1715401127, tmp));
-  assertEquals(-1793087394, x |= (tmp = -1793087394.730585, tmp));
-  assertEquals(-2, x >>= x);
-  assertEquals(263607360.10747814, x += (tmp = 263607362.10747814, tmp));
-  assertEquals(1073214955, x |= (893759979.3631718));
-  assertEquals(703953930, x -= ((2738450011)%(x^(tmp = 679402836, tmp))));
-  assertEquals(1, x >>= (tmp = 2262515165.6670284, tmp));
-  assertEquals(0, x >>= (((tmp = 747896494, tmp)^((tmp = -1005070319, tmp)+x))|x));
-  assertEquals(0, x >>= ((953612771)>>>(tmp = 3066170923.3875694, tmp)));
-  assertEquals(-314941454, x -= (x+(((314941454)%(((tmp = 2200222912.9440064, tmp)>>>(2534128736.805429))>>>(x|((747716234)%(((tmp = -252254528, tmp)%(-1553513480.1875453))&x)))))<<x)));
-  assertEquals(-535686958, x &= (-522809126));
-  assertEquals(0.5480312086215239, x /= (tmp = -977475278, tmp));
-  assertEquals(-1199953459.6090598, x *= ((-2189571393)+((3186862741.37774)>>(tmp = -2193090564.5026345, tmp))));
-  assertEquals(-1199953459.6090598, x %= ((tmp = 2986532440, tmp)*(2685122845)));
-  assertEquals(-1199953459.6090598, x %= (1951182743.7399902));
-  assertEquals(51262285383887820, x *= (-42720228));
-  assertEquals(-424776752, x |= x);
-  assertEquals(166221344210236600, x *= (tmp = -391314598.6158786, tmp));
-  assertEquals(-1883425600, x >>= (((tmp = -1020679296, tmp)^((-1416867718)+(-1412351617)))<<(-2743753169)));
-  assertEquals(0, x &= (x/(-2250026610)));
-  assertEquals(-1111956501, x ^= (tmp = 3183010795, tmp));
-  assertEquals(2012059503, x ^= (tmp = -900369276, tmp));
-  assertEquals(15719214, x >>>= (tmp = -3196277049, tmp));
-  assertEquals(15719214, x |= x);
-  assertEquals(100779035, x -= ((-1245802025)^(-2964289852)));
-  assertEquals(0, x >>= x);
-  assertEquals(0, x &= (((x<<((2361941389.708063)%x))>>((328256762.09842086)>>>((((tmp = 3094192285, tmp)-(((x>>(tmp = -2920437464, tmp))<<(tmp = -2693021467, tmp))-(x>>>((2410065554)%(x%(tmp = 2487056196.689908, tmp))))))-(tmp = -866314146, tmp))^((1754098471)-((((((-2450740191)-(tmp = 1977885539.6785035, tmp))*((tmp = -1205431332, tmp)>>>x))>>(-870601854))>>(tmp = -301859264, tmp))|((tmp = -2308971516.8301244, tmp)/x))))))&((2307007357)-((tmp = -1518812934, tmp)+(2562270162)))));
-  assertEquals(0, x <<= x);
-  assertEquals(-1802124619, x |= (-1802124619));
-  assertEquals(-1802124619, x %= ((1617132364.306333)+((1678465962.079633)|((516698570)%(((569813606)*(-1800804098.6270027))%((tmp = 1976706935, tmp)-((tmp = -1830228989.5488424, tmp)>>(((x^((tmp = 1015246068.3791624, tmp)>>x))^((-2171682812.246772)-(tmp = -398330350, tmp)))&x))))))));
-  assertEquals(904564673.6237984, x -= (tmp = -2706689292.6237984, tmp));
-  assertEquals(818237248768128900, x *= x);
-  assertEquals(254842325.2585001, x %= (1550087667.9657679));
-  assertEquals(-1163919360, x <<= x);
-  assertEquals(-3.4644526843674166, x /= ((-446801454)+(x>>>(tmp = -2025151870, tmp))));
-  assertEquals(0, x &= ((((((((-1739617728)&(x&(((tmp = -2946470036.552597, tmp)/x)*x)))^(-1130501404))>>>x)/((1870230831)>>>(840301398)))%x)/x)/(-2927537567)));
-  assertEquals(0, x >>= x);
-  assertEquals(0, x >>>= (x&(x&x)));
-  assertEquals(0, x &= ((-579614044)-(-756012505.4048488)));
-  assertEquals(-2970367642, x -= (tmp = 2970367642, tmp));
-  assertEquals(-415129376, x ^= (tmp = 2847041926.060355, tmp));
-  assertEquals(-1505681312, x &= (tmp = -1225184902.9215767, tmp));
-  assertEquals(-3174471329.5807734, x += (-1668790017.5807734));
-  assertEquals(-Infinity, x /= (x>>x));
-  assertEquals(NaN, x -= x);
-  assertEquals(0, x ^= (x^(((-1407936301.5682082)<<((x^(((tmp = 3213446217.307076, tmp)|x)|((tmp = 3219810777.3171635, tmp)/(tmp = 1561807400, tmp))))>>>((tmp = 2449910203.0949173, tmp)|((((1954662538.7453175)>>(tmp = -1711636239.9916713, tmp))>>>(tmp = 406219731.214718, tmp))<<(((-907908634.4609842)^((((((tmp = 2408712345, tmp)*(tmp = 1740346634.5154347, tmp))>>(tmp = 715783991, tmp))^(tmp = -655628853.2821262, tmp))%(tmp = 2819143280.434571, tmp))/(-1240412852)))*x)))))/x)));
-  assertEquals(0, x >>>= x);
-  assertEquals(0, x <<= x);
-  assertEquals(0, x >>>= (((-3198075268.8543105)>>(((((x+((tmp = -133461401.50823164, tmp)-((x&(((((tmp = 2617977319, tmp)>>((tmp = -2704719576.8734636, tmp)|((tmp = -977362542.2423751, tmp)<<(x<<(tmp = 3054487697.1441813, tmp)))))>>>((-1635655471)%x))/(-2079513672))%(tmp = 1993563806, tmp)))<<(tmp = -1310524200.6106496, tmp))))%((((-2558804500.7722936)+(tmp = -1641265491, tmp))<<((tmp = -1309608349, tmp)>>>x))/((tmp = -2306644272, tmp)<<x)))*(-2009396162.3063657))+(267343314.3720045))-(-2212612983.661479)))|x));
-  assertEquals(NaN, x %= x);
-  assertEquals(NaN, x *= x);
-  assertEquals(-824822309, x |= (-824822309));
-  assertEquals(-807944741, x |= (((-598067403)*((x&(tmp = 2897778389, tmp))>>>(-1322468310.3699632)))|x));
-  assertEquals(90004223.44097246, x /= (((tmp = -481122620, tmp)&x)%((tmp = 1109368524, tmp)/(((-3150568522.633032)<<(tmp = 2923396776, tmp))^(x-((x/x)&(x/(-287976185.1049104))))))));
-  assertEquals(0.4521931751193329, x /= (tmp = 199039323, tmp));
-  assertEquals(1.8110466604491368e-10, x /= (2496860986.492693));
-  assertEquals(0, x |= x);
-  assertEquals(-1225944576, x += ((tmp = -807700791.631221, tmp)<<((-700782615.4781106)-((((-2954619897)>>>x)<<((tmp = 997657844, tmp)>>>(1227994596)))/((-1234591654.8495834)*((tmp = -191189053.70693636, tmp)+(tmp = -3027659304, tmp)))))));
-  assertEquals(-1225811383, x |= (-1866233271));
-  assertEquals(3069155913, x >>>= (((x/(-99524153.40911508))%(x>>>((((tmp = 2985975640, tmp)/(tmp = 2781516546.2494454, tmp))&(((2234114508)|(((x/(tmp = -1224195047, tmp))<<x)^(x>>>((537884375.5698513)+x))))^((tmp = -2144817497.5089426, tmp)|(-498079183.8178189))))>>>((x+x)&(-3086080103.6460695)))))<<(((tmp = 2151157136, tmp)*x)/(((x/x)>>>(-1149734628.4364533))-((3025445835.654089)+(tmp = 530902725.91127443, tmp))))));
-  assertEquals(-1733702568, x ^= (tmp = 776361489.423534, tmp));
-  assertEquals(8981504, x &= ((tmp = 2902581847, tmp)*(x-(-2697760560))));
-  assertEquals(1153166.8526612986, x -= ((x/(tmp = -1375025594.5027463, tmp))+((3043576689.1538706)%(x+x))));
-  assertEquals(3389855, x |= (x+x));
-  assertEquals(-488458393.17759943, x += (-491848248.17759943));
-  assertEquals(40982867145206920, x *= ((3132857155)|(tmp = -218356553, tmp)));
-  assertEquals(688, x >>= (((((tmp = 403321821, tmp)+((tmp = 2536984658, tmp)%((tmp = 2759309029.8753624, tmp)|(((tmp = 1994203554.7417293, tmp)^((704660500.434877)*(tmp = 1536292958.2691746, tmp)))+(-164139788)))))/((1205950994.1255205)+x))^((((tmp = 975272146.0133443, tmp)-(150107797))/(-1764309514))^((x>>>(x^(x^x)))+(203250124))))>>>(tmp = 1864959239.512323, tmp)));
-  assertEquals(10, x >>= ((tmp = 1631996431.9620514, tmp)>>x));
-  assertEquals(10, x %= (tmp = 2678904916, tmp));
-  assertEquals(335544320, x <<= (tmp = -2759037415.6811256, tmp));
-  assertEquals(-153389967, x |= ((tmp = -2411636565, tmp)+(tmp = -2305156154, tmp)));
-  assertEquals(-1171, x >>= x);
-  assertEquals(813080576, x &= (((tmp = -65428547, tmp)&(tmp = 3163266999, tmp))<<x));
-  assertEquals(4346532303, x += ((tmp = -761515569.0707853, tmp)>>>(((tmp = 143240971.0661509, tmp)<<x)*(x^((tmp = -271697192.8471005, tmp)&x)))));
-  assertEquals(-863299035, x ^= ((((2663001827.1492147)>>>((x/(((tmp = 482665912, tmp)-(x>>(tmp = 354425840.784659, tmp)))>>((-2012932893)>>>x)))/((tmp = -1354385830.6042836, tmp)>>>(-2149023857))))^((tmp = 585746520, tmp)+(tmp = 756104608, tmp)))^(517529841.184085)));
-  assertEquals(-997654012, x &= (((tmp = -404836025.15326166, tmp)+((tmp = 3035650114.0402126, tmp)<<((-1308209196)>>(tmp = 693748480, tmp))))<<(((465774671.4458921)<<x)/(1971108057))));
-  assertEquals(-320581507110848260, x *= ((x-(tmp = -2266777911.7123194, tmp))^(tmp = -2810021113.304348, tmp)));
-  assertEquals(-320581508271196300, x += ((-1195215841.5355926)|(x-((2715907107.4276557)+(((-843426980)>>(x&(x%(tmp = -1139279208.34768, tmp))))^x)))));
-  assertEquals(368031616, x &= x);
-  assertEquals(368031616, x %= (tmp = 1211767328, tmp));
-  assertEquals(-67505614939510744, x *= (tmp = -183423412.56766033, tmp));
-  assertEquals(959424552, x >>= ((tmp = -171120122.5083747, tmp)/x));
-  assertEquals(30949179.096774194, x /= (((x-((((x&(tmp = -180770090, tmp))<<(((tmp = -2061363045.419958, tmp)*((655711531)^((1205768703)-(tmp = 2468523718.8679857, tmp))))+(-2746704581)))+((-853685888)*(tmp = -2299124234, tmp)))|(tmp = 2429502966, tmp)))|(((-985794986.0232368)>>>(2890862426))%x))>>(tmp = 1005542138.8415397, tmp)));
-  assertEquals(30949179, x |= x);
-  assertEquals(30949179, x %= (810126097.6814196));
-  assertEquals(120895, x >>= (tmp = 3065886056.1873975, tmp));
-  assertEquals(1934320, x <<= (1478650660.7445493));
-  assertEquals(0, x >>= (1069658046.2191329));
-  assertEquals(NaN, x %= x);
-  assertEquals(NaN, x %= (x*x));
-  assertEquals(NaN, x *= ((((2148513916)+(tmp = -210070225.85489202, tmp))>>(975470028))+((-3060642402)>>x)));
-  assertEquals(NaN, x *= (2888778384));
-  assertEquals(NaN, x -= (294531300.16350067));
-  assertEquals(-465620423, x ^= (tmp = -465620423.5891335, tmp));
-  assertEquals(1613303808, x &= (-2530649850.1952305));
-  assertEquals(2045458658, x |= (tmp = 432158946.5708574, tmp));
-  assertEquals(0, x >>>= (2277328255.770018));
-  assertEquals(0, x &= (-64904722.41319156));
-  assertEquals(0, x >>= x);
-  assertEquals(3109394857.361766, x += (3109394857.361766));
-  assertEquals(1519021650, x ^= ((tmp = -2632472653, tmp)|(tmp = 2161964921.8225584, tmp)));
-  assertEquals(370854, x >>>= ((1486892931.4564312)-((tmp = 3017755741.9547133, tmp)>>>x)));
-  assertEquals(1333145110.39802, x -= ((-1051580495.39802)-(tmp = 281193761, tmp)));
-  assertEquals(0, x ^= x);
-  assertEquals(0, x |= x);
-  assertEquals(0, x <<= x);
-  assertEquals(0, x >>>= x);
-  assertEquals(799202788.1455135, x -= (tmp = -799202788.1455135, tmp));
-  assertEquals(1539080192, x <<= (x%(((((x-x)|(((((x%(959993901))+(tmp = -2647575570.092733, tmp))/(tmp = -2040600976.5104427, tmp))*(x*(tmp = 2785252760, tmp)))>>(-377867259)))/((x&(1549738240.013423))>>>(tmp = -1502185618, tmp)))*x)%(1159283801.0002391))));
-  assertEquals(0, x >>= (-268660225));
-  assertEquals(-0, x /= (-2795206270.635887));
-  assertEquals(0, x >>>= (1869556260.2489955));
-  assertEquals(64202212, x ^= ((((tmp = -942983515.5386059, tmp)*(((1057759788)-x)*(tmp = 2038041858, tmp)))>>x)+(tmp = 64202212, tmp)));
-  assertEquals(2021126977, x -= ((tmp = -2009912898, tmp)^((2240062309)%x)));
-  assertEquals(4332348265459724000, x *= (tmp = 2143530968, tmp));
-  assertEquals(1472, x >>>= ((283380755)<<x));
-  assertEquals(-1672370407872, x *= (tmp = -1136121201, tmp));
-  assertEquals(338573318, x ^= (tmp = 2329579078.4832354, tmp));
-  assertEquals(2377388772.1662374, x -= (tmp = -2038815454.1662374, tmp));
-  assertEquals(-1.264761712403516, x /= ((((tmp = -2106209534, tmp)>>((((((tmp = 626190172, tmp)/x)>>>(-824270996.8545206))/((1258369810.9498723)-(tmp = -2947556209, tmp)))^((((366784589.24711144)|(1462064104.828938))-(1571045395.777879))<<(444685689.60103726)))>>(tmp = -2757110357.410516, tmp)))/(x>>>((tmp = 829226010, tmp)>>>(629512715))))|x));
-  assertEquals(-2905481691.264762, x -= (2905481690));
-  assertEquals(-1710543566.1481905, x -= (-1194938125.1165714));
-  assertEquals(-3421087132.296381, x += x);
-  assertEquals(-884178944, x <<= ((-1820881235)|x));
-  assertEquals(-884178944, x &= (x%(tmp = -2298828530, tmp)));
-  assertEquals(1516503040, x <<= ((tmp = -3039882653, tmp)+((tmp = 1956034508, tmp)<<(x>>(tmp = 280388051, tmp)))));
-  assertEquals(3033006080, x += x);
-  assertEquals(846431222.321887, x %= (x+(-1939718651.1609435)));
-  assertEquals(-846431224, x ^= ((-1742116766.54132)/x));
-  assertEquals(1157918728, x &= (tmp = 1966568030, tmp));
-  assertEquals(1157918728, x >>>= ((((((tmp = -2392096728.184257, tmp)*(x&(-3051259597.301086)))>>>(((tmp = 1712991918.071982, tmp)*(tmp = -714525951, tmp))-((-1784801647)>>((-1270567991)%(((214272558)/(((-3110194570)|(tmp = 2558910020, tmp))&(-1266294955.717899)))*((2654922400.609189)>>>(tmp = 370485018, tmp)))))))*(((tmp = -2621203138.1838865, tmp)%(858913517))*((tmp = -1564229442.2596471, tmp)>>((tmp = 1898557618, tmp)|(-1282356275)))))*(tmp = -1253508468, tmp))+((-361964404.75944185)|x)));
-  assertEquals(961668975, x += (-196249753));
-  assertEquals(1, x >>= (tmp = 890453053, tmp));
-  assertEquals(1, x >>= (((((tmp = 871309275, tmp)/(x>>>((tmp = 2033022083, tmp)&(tmp = -1393761939, tmp))))%((437488665.104565)^(tmp = 2808776860.4572067, tmp)))-((tmp = -359283111.49483967, tmp)<<((tmp = 2985855945, tmp)%(tmp = -596479825.9114966, tmp))))/(-1965528507)));
-  assertEquals(0, x >>= ((tmp = -1753776989, tmp)%(tmp = 322622654, tmp)));
-  assertEquals(84411424, x ^= (((x|(x|(tmp = -1617122265, tmp)))&(tmp = -313813263, tmp))&(1472888112.0258927)));
-  assertEquals(67633184, x &= ((1556833131.0776267)<<(x<<(1501219716.5575724))));
-  assertEquals(68002293, x |= (((tmp = 188984203.0350548, tmp)>>>(tmp = 1356052777, tmp))%(x*(tmp = -2944960865, tmp))));
-  assertEquals(67108864, x &= (((1046644783.9042064)<<x)+((-2796345632)>>>(((-1913290350.3687286)<<(((((tmp = -2223692353, tmp)>>x)&(x<<(x>>((((tmp = -976850020, tmp)%(tmp = 1379692507, tmp))>>>(1120103052.2077985))>>(tmp = 5592070.612784743, tmp)))))<<(x+((tmp = -3154037212.9764376, tmp)%(((x-(-1961060483.6965141))+(((1920670676)-(2852444470.7530622))/(((1445954602)>>((1353665887)>>(tmp = 111411560.64111042, tmp)))<<x)))+x))))<<((-1773130852.6651905)^((1216129132)>>(1511187313.2680469)))))|((tmp = -1107142147, tmp)|(tmp = -768165441.4956136, tmp))))));
-  assertEquals(0, x -= x);
-  assertEquals(0, x %= (tmp = -1655707538.0778136, tmp));
-  assertEquals(-184120712930843900, x += (x+((tmp = -3174410166, tmp)+((tmp = -301807453, tmp)*(tmp = 610060182.1666535, tmp)))));
-  assertEquals(-54598560, x >>= (-1365351357));
-  assertEquals(-6763.94449950446, x /= (((-1953016847)<<((673287269.7002038)%(-558739761)))>>>(tmp = 1607754129, tmp)));
-  assertEquals(-1, x >>= x);
-  assertEquals(1, x >>>= x);
-  assertEquals(0, x >>>= x);
-  assertEquals(0, x >>= ((-384747983)+((((tmp = -949058352.381772, tmp)>>>(-1920744986))-(-882729639))^((x^((tmp = 2351364046, tmp)<<(((tmp = -3110165747, tmp)^(-1266489735))-((tmp = -371614326, tmp)>>((tmp = -2064968414, tmp)&(-2075036504.617934))))))&(((-2616501739)&(tmp = 2591437335.4029164, tmp))>>x)))));
-  assertEquals(0, x >>>= ((tmp = 2946468282, tmp)&((-2741453019)>>x)));
-  assertEquals(0, x -= ((x%(-134700915))&(-1955768279)));
-  assertEquals(NaN, x /= x);
-  assertEquals(NaN, x /= (x^(((((((tmp = 3185669685.772061, tmp)>>(tmp = -1973500738, tmp))-(tmp = -87401348.93002152, tmp))>>(tmp = -2813508730, tmp))&(tmp = -778957225, tmp))<<(x-(x&((-2821756608)+(((((tmp = 2475456548, tmp)/(tmp = 997998362, tmp))<<((tmp = -83043634, tmp)|x))%(636120329))%(tmp = -1910213427.7556462, tmp))))))%x)));
-  assertEquals(0, x &= x);
-  assertEquals(0, x <<= x);
-  assertEquals(0, x >>>= (x%x));
-  assertEquals(0, x %= (745221113));
-  assertEquals(0, x >>>= ((1467615554.7672596)|x));
-  assertEquals(0, x /= (tmp = 735317995, tmp));
-  assertEquals(-1513001460, x |= (2781965836));
-  assertEquals(-1513001460, x |= (x%(1970577124.3780568)));
-  assertEquals(-0, x %= x);
-  assertEquals(1864972269, x ^= (-2429995027.840316));
-  assertEquals(1226843341, x &= (tmp = -639621923.5135081, tmp));
-  assertEquals(1226843339.3171186, x += ((1297620268.272113)/(-771070549)));
-  assertEquals(76677708, x >>>= (1009134980));
-  assertEquals(0, x ^= x);
-  assertEquals(0, x ^= x);
-  assertEquals(NaN, x /= x);
-  assertEquals(716040787, x |= ((1851586229)-(1135545441.3502865)));
-  assertEquals(1385693184, x <<= x);
-  assertEquals(1321, x >>= (x^((tmp = -1576632297.0860603, tmp)>>>(405218605))));
-  assertEquals(-1319012931, x |= (-1319014243));
-  assertEquals(-1319012931, x >>= ((((1689898279.3580785)<<((((x^(x>>>((((tmp = 2635260332, tmp)*(tmp = 2053357650, tmp))*x)*(2856480122.339903))))>>x)&(-2382703000.077593))%(1183918594)))*(tmp = -1670081449, tmp))<<x));
-  assertEquals(-528327581.7646315, x %= (tmp = -790685349.2353685, tmp));
-  assertEquals(2073431790, x ^= (tmp = 2601800333, tmp));
-  assertEquals(-6514722684180, x -= (((tmp = 824141806.0668694, tmp)>>>(((-1865885282.8723454)&(x&(x|((900188006.3757659)>>>(x&x)))))+(2227126244.0526423)))*x));
-  assertEquals(1450593, x >>>= ((2157053647)>>(x+(-2934071355.418474))));
-  assertEquals(576782336, x <<= ((1054640368.827202)&((tmp = -3182236876.434615, tmp)>>(tmp = 2129856634.0328193, tmp))));
-  assertEquals(2950754326, x -= (tmp = -2373971990, tmp));
-  assertEquals(738197504, x <<= (1188157369.5988827));
-  assertEquals(0, x <<= (x+((tmp = -839533141, tmp)&((((((tmp = -1148768474.7306862, tmp)|(172650299))+(tmp = -2739838654, tmp))/(3132557129))%x)>>>(tmp = -1229961746.2466633, tmp)))));
-  assertEquals(0, x %= (tmp = -2974207636, tmp));
-  assertEquals(0, x %= ((2323482163)>>>x));
-  assertEquals(0, x &= (((x/(x+(x>>((tmp = 55935149, tmp)%x))))|((3109182235)>>>(tmp = 1217127738.8831062, tmp)))+((((tmp = -385114910, tmp)*((((((tmp = -2535158574.634239, tmp)&(x+x))<<(-2821692922.43476))&(-776804130.9457026))>>((-1374832535)^(tmp = 2175402162.701251, tmp)))%(-1646995095)))-(x*(tmp = -921556123, tmp)))^(79224621))));
-  assertEquals(128935435, x |= ((tmp = 2279459038, tmp)%(tmp = -537630900.5271742, tmp)));
-  assertEquals(128935435, x /= ((((((x<<(2750024311))-((-1332480769.4784315)&(1418160003)))&(1551783357))<<(((((-2870460218.55027)|((-1958752193.7746758)&(2551525625)))>>>((((tmp = -1698256471, tmp)^(((((((((tmp = -830799466, tmp)+x)-(-111590590))+(tmp = -1105568112.3921182, tmp))/((tmp = -3058577907, tmp)|(((-1944923240.2965696)%(-2884545285))<<(tmp = -1993196044.1645615, tmp))))^(x>>(tmp = -2961488181.3795304, tmp)))&x)*x)|(((tmp = 97259132.88922262, tmp)<<((1601451019.343733)&x))*(x|x))))+((((x>>x)<<x)+(-868409202.2512136))/(((tmp = -2893170791, tmp)-((x|(-853641616))%(((tmp = 549313922, tmp)&(-768036601.6759064))%(tmp = -543862220.9338839, tmp))))-((tmp = 1639851636, tmp)+((2164412959)/(-273028039.941242))))))>>>((((-2382311775.753495)^(-2062191030.2406163))>>>(tmp = -1054563031, tmp))/(-862111938.7009578))))%x)+(-3103170117.625942)))%((tmp = -1144062234, tmp)>>x))>>>(tmp = 1216332814.00042, tmp)));
-  assertEquals(41.631074722901715, x /= (x&(-2542806180.962227)));
-  assertEquals(41.631074722901715, x %= (-14003386.556780577));
-  assertEquals(8, x &= (x&((-2231622948)%(tmp = 488279963.9445952, tmp))));
-  assertEquals(9.002961614252625e-9, x /= ((53802728.56204891)<<(((867697152.3709695)-(538719895.5707034))&(-631307825.4491808))));
-  assertEquals(0, x >>= x);
-  assertEquals(-0, x *= (tmp = -785674989, tmp));
-  assertEquals(-0, x += x);
-  assertEquals(0, x /= (-250703244));
-  assertEquals(0, x <<= ((tmp = -661062581.5511999, tmp)|x));
-  assertEquals(0, x &= (-1299482308));
-  assertEquals(0, x &= ((-399690060)>>>(2448074202.385213)));
-  assertEquals(0, x &= (2574341201));
-  assertEquals(0, x <<= ((x|(((tmp = 2458873162.645012, tmp)+(tmp = -1999705422.8188977, tmp))<<((x^(tmp = -392530472, tmp))>>>x)))&(((tmp = 2463000826.7781224, tmp)|(tmp = 3020656037, tmp))-x)));
-  assertEquals(1397603760, x += ((tmp = -1359413071, tmp)-(tmp = -2757016831, tmp)));
-  assertEquals(513823851, x -= (883779909));
-  assertEquals(-1765712747, x ^= (2288060670.6797976));
-  assertEquals(3117741504918286000, x *= x);
-  assertEquals(3117741506284045300, x += (1365759456));
-  assertEquals(6035555595.597267, x /= (tmp = 516562470, tmp));
-  assertEquals(104203275, x &= (tmp = 376835755.32434213, tmp));
-  assertEquals(10858322520725624, x *= x);
-  assertEquals(59458951, x >>>= (153765028));
-  assertEquals(49370856, x += ((tmp = -1291276092, tmp)>>x));
-  assertEquals(0, x %= x);
-  assertEquals(0, x += x);
-  assertEquals(-1494589645, x -= (1494589645));
-  assertEquals(-0, x %= x);
-  assertEquals(0, x <<= (x&((2730708043.467806)<<x)));
-  assertEquals(0, x /= ((tmp = -1483912394.153527, tmp)>>>((tmp = 1800568769, tmp)^((((((tmp = 1351568510, tmp)>>(tmp = -1337992543.2562337, tmp))>>>(tmp = 2602239360.40513, tmp))*x)%x)+(-2095840128.0700707)))));
-  assertEquals(-0, x /= ((2363946613)^(tmp = -2227868069, tmp)));
-  assertEquals(0, x &= ((((2634933507)<<(2798775374.140882))>>>x)>>>(((tmp = 1135200853.6396222, tmp)-(tmp = -1529829490.7007523, tmp))-(((((((((x^((x|(2135742668.591568))-(924230444.8390535)))%(tmp = -2459525610.51898, tmp))+(x&((tmp = 1177231743.809653, tmp)/(tmp = 1743270357.2735395, tmp))))|(((tmp = -1894305017, tmp)^((tmp = 1791704240, tmp)&x))%(-1569751461)))>>>(tmp = -2078321944, tmp))|x)*(((x*(tmp = -163239354, tmp))<<((tmp = 2859087562.694203, tmp)&(-657988325.9410558)))^(2508013840)))-((-243572350)+(x%((-1095206140)+((tmp = 3213566608.942816, tmp)*((2256442613)%((tmp = 1723751298, tmp)^(x-((-1145710681.2693722)|x)))))))))+(1556870627)))));
-  assertEquals(130883024.97423434, x -= (-130883024.97423434));
-  assertEquals(0.046720352789736276, x /= (tmp = 2801413456, tmp));
-  assertEquals(1806558189, x |= (tmp = 1806558189.157823, tmp));
-  assertEquals(72.40475060062144, x /= (x%((1932591076.531628)>>(1982030182))));
-  assertEquals(-1077558321.5975945, x += (tmp = -1077558394.002345, tmp));
-  assertEquals(98187, x >>>= x);
-  assertEquals(97792, x &= (tmp = -1032487404, tmp));
-  assertEquals(709197609, x |= (x^(709179177)));
-  assertEquals(11081212, x >>>= (tmp = 1412940006.169063, tmp));
-  assertEquals(11081212, x &= x);
-  assertEquals(-1920311203, x -= ((tmp = 1931392415, tmp)<<((x%(tmp = -2873576383, tmp))%x)));
-  assertEquals(-1920311203, x |= (x&(-993884718.2172024)));
-  assertEquals(-4, x >>= (1409411613.0051966));
-  assertEquals(-7947632484, x *= ((-2856731734)^((-1181032235.9132767)-((tmp = 780101930, tmp)+((tmp = -1732707132.6253016, tmp)^x)))));
-  assertEquals(-2016362769, x ^= (tmp = 2711125619.2455907, tmp));
-  assertEquals(-61535, x >>= x);
-  assertEquals(-124771649, x ^= (tmp = 124726558, tmp));
-  assertEquals(-1, x >>= x);
-  assertEquals(-0, x %= (x*x));
-  assertEquals(0, x <<= x);
-  assertEquals(0, x /= (2444628112));
-  assertEquals(0, x <<= ((-38968517.72504854)<<x));
-  assertEquals(-1504619917, x |= (tmp = 2790347379, tmp));
-  assertEquals(-1504619917, x &= x);
-  assertEquals(2790347379, x >>>= ((1825218368)<<(-1843582593.2843356)));
-  assertEquals(7786038495492170000, x *= x);
-  assertEquals(-11011696, x |= (((tmp = 2931644407.4936504, tmp)-(3077095016.001658))%(tmp = -1731851949, tmp)));
-  assertEquals(-107866, x %= ((-697845074.1661191)>>(772708134)));
-  assertEquals(356779149, x ^= (-356884949.503757));
-  assertEquals(0, x %= x);
-  assertEquals(0, x *= ((tmp = 1542291783, tmp)^x));
-  assertEquals(0, x += ((tmp = 1105314644.002441, tmp)&x));
-  assertEquals(-1005882993, x ^= (-1005882993.0899806));
-  assertEquals(-1301065066, x += (tmp = -295182073, tmp));
-  assertEquals(-1454702592, x <<= ((-2440858737.390277)&(-1363565201.7888322)));
-  assertEquals(-201539012492525570, x *= ((((tmp = -1416268089, tmp)|x)-(tmp = 1669129769, tmp))&(x<<((x/(-2614041678.7423654))%x))));
-  assertEquals(-2.1995276811535986e+25, x *= (x/(-1846667987.154371)));
-  assertEquals(0, x |= ((x*(((x>>>((tmp = 1044173034, tmp)>>>((x<<((tmp = -2906412863, tmp)%((tmp = -437401503, tmp)<<(((((x|(2167319070))<<((tmp = 2766179640.1840167, tmp)&(-2372076054)))*(tmp = -241617431.06416297, tmp))*((((((tmp = 2570465382.5574293, tmp)>>>(x/((-2851324509.354545)%x)))>>(((x+((tmp = -614687945, tmp)^x))^((((tmp = 1653437743, tmp)>>x)/(tmp = 3072995069, tmp))>>x))*(((((-290508242)>>((tmp = 2969511554, tmp)<<(tmp = 158176292.95642304, tmp)))<<(32376015))+(tmp = 2391895870.4562025, tmp))*x)))&((((x/(tmp = 365292078.53605413, tmp))>>x)/(1167322811.0008812))|(((tmp = 2487970377.365221, tmp)^x)<<((tmp = 2342607988.711308, tmp)/(((2276081555.340126)-(((tmp = -2571071930, tmp)>>(tmp = -248468735.76550984, tmp))>>>(tmp = -2862254985.608489, tmp)))^(-1312017395))))))<<x)&(2762717852.949236)))+((((-2492896493)&x)<<(-2756272781.4642315))/x)))))*(2405395452))))>>((-1433975206)/((tmp = -2064757738.6740267, tmp)<<((((tmp = -1563531255, tmp)-(-589277532.2110934))<<x)^(2249328237.0923448)))))-x))-(-225624231)));
-  assertEquals(0, x *= (tmp = 1657982666.2188392, tmp));
-  assertEquals(86443387, x |= (tmp = 86443387.25165462, tmp));
-  assertEquals(86443387, x %= (-1341731981.702294));
-  assertEquals(172886774, x <<= ((-1799840391)&(1011948481.310498)));
-  assertEquals(-1115684864, x <<= x);
-  assertEquals(-2098253702059525600, x *= (1880686715.1865616));
-  assertEquals(-2098253700213206300, x -= (tmp = -1846319435.0583687, tmp));
-  assertEquals(570692096, x &= (((tmp = -1572055366.64332, tmp)%(tmp = 1720120910, tmp))%((x-(912386952.5959761))*(tmp = -1146251719.4027123, tmp))));
-  assertEquals(603979776, x <<= ((-329752233.8144052)&(tmp = -368636559, tmp)));
-  assertEquals(603979776, x <<= x);
-  assertEquals(364791569817010200, x *= x);
-  assertEquals(0, x &= ((2074587775.983799)/(tmp = 438856632.76449287, tmp)));
-  assertEquals(0, x &= (((1509671758)*(tmp = -935801537.7325008, tmp))>>>(((tmp = -1752877566, tmp)<<x)%(tmp = -517163766, tmp))));
-  assertEquals(-2031730599, x ^= ((2264285273)&(tmp = -1762662949.014101, tmp)));
-  assertEquals(-843578945, x %= (-1188151654));
-  assertEquals(-2147483648, x <<= x);
-  assertEquals(-2147483648, x >>= (tmp = -3165079200.229641, tmp));
-  assertEquals(-44086313.1323726, x %= ((x%(-254466243.48728585))-((x>>(-457411829.1063688))-((-2606923436.9333453)/x))));
-  assertEquals(-44086313, x |= x);
-  assertEquals(1037812, x >>>= ((tmp = 342497258.9786743, tmp)+(1652928385.8150895)));
-  assertEquals(-2371695599678100, x *= (tmp = -2285284425, tmp));
-  assertEquals(-2371697387004653, x += (tmp = -1787326553.0542095, tmp));
-  assertEquals(0, x ^= x);
-  assertEquals(0, x >>= ((x^(tmp = 544039787, tmp))>>>x));
-  assertEquals(0, x &= ((x%(((((((tmp = -424572417.1088555, tmp)|(-2381863189))/(tmp = -2007482475.1809125, tmp))&(((((tmp = 311016073, tmp)>>(tmp = -1548839845, tmp))+((-2557740399.7947464)<<(2399113209)))&x)>>>x))%(-297180308.7721617))-(tmp = 860906293, tmp))^x))%(-2740622304)));
-  assertEquals(4971841192462909000, x += ((tmp = -2723203837.572612, tmp)+((((-2909100706)+(-951999374))|(-3116735764))*(3087123539.422669))));
-  assertEquals(-460, x >>= (1081807537.557404));
-  assertEquals(2354165127.3906384, x += (tmp = 2354165587.3906384, tmp));
-  assertEquals(357.8680960002211, x /= ((((x<<(((x&x)+(1113841407))|((x/(tmp = 384533564, tmp))>>>(-605853882))))%x)&((tmp = 2050375842, tmp)>>>x))>>(((2745147573)^x)<<(x-(900043292)))));
-  assertEquals(0, x *= (x>>>(-295974954.5058532)));
-  assertEquals(0, x *= ((-2448592125.815531)*(tmp = -94957474.8986013, tmp)));
-  assertEquals(0, x &= ((x>>x)^(tmp = -1335129180, tmp)));
-  assertEquals(395092065, x |= ((3081659156)^(tmp = -1608334475, tmp)));
-  assertEquals(395092065, x &= x);
-  assertEquals(-413337639, x += (x^(tmp = -664996071.3641524, tmp)));
-  assertEquals(-1604423637896759800, x *= (x>>>(tmp = 1242912352.955432, tmp)));
-  assertEquals(0, x &= ((((((tmp = 651293313, tmp)|(((2541604468.635497)>>>(tmp = 758815817.7145422, tmp))>>>((-1948795647)/x)))&x)/((tmp = -3161497100, tmp)+(782910972.3648237)))>>>x)%(834206255.5560443)));
-  assertEquals(0, x >>>= (tmp = 125945571, tmp));
-  assertEquals(NaN, x -= (x%x));
-  assertEquals(NaN, x %= (tmp = 282259853, tmp));
-  assertEquals(NaN, x += (tmp = -2081332383, tmp));
-  assertEquals(0, x >>>= (((x>>(-2298589097.7522116))|((((x>>>(x-(tmp = 755218194, tmp)))|x)%x)-(tmp = 2206031927, tmp)))>>>((((x&(x-x))^(tmp = 2836686653, tmp))*((x<<(tmp = -1624140906.4099245, tmp))>>>((2942895486)|((x>>>x)>>>(-1586571476)))))|((781668993)+(-1857786909)))));
-  assertEquals(0, x &= (tmp = -708084218.9248881, tmp));
-  assertEquals(0, x %= (1645913394.5625715));
-  assertEquals(0, x <<= ((x^((tmp = 1185413900, tmp)*((-2441179733.997965)*(tmp = 2554099020.066989, tmp))))%((1704286567.29923)/x)));
-  assertEquals(0, x += x);
-  assertEquals(0, x *= x);
-  assertEquals(0, x |= (x>>>(139138112.141927)));
-  assertEquals(0, x >>>= (tmp = 2142326564, tmp));
-  assertEquals(0, x |= x);
-  assertEquals(-0, x /= ((((x+(2817799428))|x)%((1050079768)-(x>>>((1452893834.8981247)|((((tmp = -1737187310.889149, tmp)/(tmp = -362842139, tmp))%(1234225406))%(((x|x)*((-1055695643.739629)-((x-x)*(945954197.676585))))-(tmp = 786185315.346615, tmp)))))))<<(-173891691)));
-  assertEquals(0, x &= (-2842855092.319309));
-  assertEquals(0, x &= ((-3188403836.570895)/x));
-  assertEquals(0, x *= (x+x));
-  assertEquals(NaN, x /= (x>>>(((tmp = 391037497.68871593, tmp)/((192754032)*(1382659402.5745282)))/((((-2187364928)>>>x)>>(tmp = 2563448665.7594023, tmp))^(tmp = 1500866009.7632217, tmp)))));
-  assertEquals(NaN, x /= ((tmp = -935036555.2500343, tmp)-(x/(((x&(x^(tmp = -3001352832.5034075, tmp)))^x)/((1122547613)>>x)))));
-  assertEquals(0, x >>= (tmp = -2951766379.0809536, tmp));
-  assertEquals(-632945188, x ^= (-632945188.7188203));
-  assertEquals(-632945188, x %= ((((((tmp = -3181527314.82724, tmp)&(2280175415))>>(x^(x|x)))^(tmp = -524233678.52970886, tmp))*x)|((tmp = 1782882786, tmp)>>>(tmp = -592607219, tmp))));
-  assertEquals(404189184, x <<= ((tmp = -2761472127, tmp)^(36616299.88780403)));
-  assertEquals(872651572, x ^= (tmp = 739568436.6252247, tmp));
-  assertEquals(13, x >>>= ((tmp = -1033843418.865577, tmp)%(x%(1247263629.0445533))));
-  assertEquals(0, x >>>= x);
-  assertEquals(0, x >>= (3189175317));
-  assertEquals(0, x &= (((2391973519.6142406)^((-2950058736.191456)|(x*x)))>>(tmp = 343822384.294345, tmp)));
-  assertEquals(0, x >>>= (tmp = -2306246544, tmp));
-  assertEquals(-1572339598, x ^= ((tmp = 2991380083.337327, tmp)&(tmp = -1361507970, tmp)));
-  assertEquals(649, x >>>= ((1961407923.4950056)>>(x-(-872821523.7513013))));
-  assertEquals(649, x ^= (((x&(tmp = -702931788, tmp))^(((x>>x)|(((tmp = 2710759269, tmp)/(x>>(x*((((((tmp = -2428445134.9555864, tmp)+(-1859938743))%(x<<x))*((236868604)+((tmp = -3066688385, tmp)/(787503572.8839133))))/(tmp = 3215629315, tmp))>>(-1315823020)))))%(1461368627.1293125)))>>>(tmp = -2921804417.5735087, tmp)))/(x>>>(((tmp = 2175260691.824617, tmp)/((-582958935.7628009)-((((((x>>x)|(2590503723.4810824))^(tmp = -1994324549, tmp))-(-684683327))/(tmp = -3133419531, tmp))|(tmp = -328974092.05095506, tmp))))>>(-447624639.4518213)))));
-  assertEquals(649, x %= ((((1854382717)|(((x+(tmp = 2568081234, tmp))-x)+((tmp = 1043086140, tmp)<<((tmp = 2979118595.0496006, tmp)+((x&(2669577199.852803))/(-2567808445.101112))))))<<((((tmp = -1471092047, tmp)&((-3099138855.21041)-((tmp = -798574377.526715, tmp)&((2255586141)<<(-1069867774)))))>>>(((x*(tmp = -2810255707.781517, tmp))/x)*(2706435744.054121)))^(394262253)))^((844325548.0612085)/(tmp = 1434691648, tmp))));
-  assertEquals(823215943.1924392, x += (tmp = 823215294.1924392, tmp));
-  assertEquals(536872706, x &= ((-334612686)%((1303605874)|x)));
-  assertEquals(-30666374.413486242, x += ((tmp = -567539080.4134862, tmp)%(tmp = -1655555936.3195171, tmp)));
-  assertEquals(-56438727096752984, x *= (tmp = 1840410814, tmp));
-  assertEquals(-33200107.984488487, x %= (((tmp = 3007206509, tmp)-(3079337725.6659536))%(1819565202.5011497)));
-  assertEquals(-1214493182, x ^= (-3060193769));
-  assertEquals(-1214493179.1335113, x -= ((-3218099496.595745)/(1122662554)));
-  assertEquals(-1214493179, x >>= ((-375364195)<<(((tmp = 619439637.8754326, tmp)>>(-1830023279.9486575))&(tmp = -1106180387.2448823, tmp))));
-  assertEquals(-303623295, x >>= (-2109241374.3349872));
-  assertEquals(-0, x %= x);
-  assertEquals(0, x |= x);
-  assertEquals(1917126206, x -= (-1917126206));
-  assertEquals(2659779928, x -= (tmp = -742653722, tmp));
-  assertEquals(-1635187368, x >>= ((tmp = -674385169, tmp)*((9848362.783326745)|(x*(55220544.00989556)))));
-  assertEquals(-1981113695, x ^= ((tmp = 392404985, tmp)>>(((x<<((2006207061)<<(tmp = 2558988218, tmp)))*((((tmp = 1789304307.1153054, tmp)/(2538061546))<<(tmp = 556026116, tmp))&((tmp = 1076457999.6424632, tmp)*(tmp = -1822378633.2489474, tmp))))%(((((-1117046924)&((-69013651)%(x&(((-2320327696)/(x&x))-(tmp = 2458222544, tmp)))))>>((-3092360983.0037227)/(-3171415636)))*(((tmp = 2520431213, tmp)<<(1066492762.6149663))+((tmp = 1272200889, tmp)^((1687693123.2295754)+x))))-(-1096823395)))));
-  assertEquals(-990556848, x >>= x);
-  assertEquals(981202869119695100, x *= x);
-  assertEquals(981202869119695100, x -= (x/x));
-  assertEquals(0, x ^= (x>>x));
-  assertEquals(NaN, x %= x);
-  assertEquals(0, x ^= x);
-  assertEquals(0, x *= ((((2980512718)>>>x)<<((x^(-1111233869))>>((2531466092.6036797)>>>(((tmp = -1791229364, tmp)*(-2210950307.206208))%((tmp = -806645443, tmp)<<((((((((tmp = 112334634.26187229, tmp)%(x|((((2154021796.1166573)+x)&((-1047293079.9686966)^(tmp = -1894127139, tmp)))+(tmp = 1910946653.2314827, tmp))))^(293142672.5016146))-x)<<(-1593533039.8718698))+x)>>(x<<(((46359706.50393462)&(tmp = 272146661, tmp))|(tmp = 2117690168, tmp))))%(tmp = -1784737092.4924843, tmp)))))))-(1465796246)));
-  assertEquals(0, x &= x);
-  assertEquals(NaN, x %= x);
-  assertEquals(0, x &= (x+(-1612418456)));
-  assertEquals(0, x &= ((tmp = -843964311, tmp)/x));
-  assertEquals(NaN, x /= x);
-  assertEquals(NaN, x *= x);
-  assertEquals(NaN, x += (x>>>(54020240)));
-  assertEquals(489206868, x |= (489206868));
-  assertEquals(489206868, x &= x);
-  assertEquals(489206848, x &= ((tmp = -1699133906.2361684, tmp)>>(tmp = 2658633814, tmp)));
-  assertEquals(489206848, x |= x);
-  assertEquals(1910559006, x -= (tmp = -1421352158, tmp));
-  assertEquals(1, x >>= x);
-  assertEquals(0, x -= x);
-  assertEquals(0, x %= (x^(tmp = 2745376003.2927403, tmp)));
-  assertEquals(0, x %= (((tmp = 3199743302.1063356, tmp)^((-1905944176)&(x>>>(187247029.5209098))))<<((x*((-1394648387)*(1252234289)))-(3140049815))));
-  assertEquals(0, x <<= (-2567872355));
-  assertEquals(0, x %= (tmp = 1057707555.8604916, tmp));
-  assertEquals(0, x %= ((tmp = -1877857405.0228279, tmp)>>>(((tmp = 423831184, tmp)*((tmp = -2106757468.324615, tmp)%(tmp = -1197717524.6540637, tmp)))>>(tmp = -93746263.46774769, tmp))));
-  assertEquals(0, x |= x);
-  assertEquals(-0, x *= ((tmp = 1317609776.6323466, tmp)*(tmp = -26959885.89325118, tmp)));
-  assertEquals(0, x >>= (-1288116122.0091262));
-  assertEquals(0, x &= ((370818172.92511404)%((tmp = -528319853.54781747, tmp)*(x/((tmp = -2839758076, tmp)^(x+(((-1258213460.041857)<<(tmp = 302017800.72064054, tmp))|((((tmp = -624254210, tmp)^((-338165065.97507)|((623392964)-x)))>>>x)%(tmp = 2767629843.0643625, tmp)))))))));
-  assertEquals(0, x >>>= x);
-  assertEquals(0, x >>>= x);
-  assertEquals(0, x |= ((-2001549164.1988192)*x));
-  assertEquals(0, x -= x);
-  assertEquals(0, x *= (((((165836842.14390492)*(tmp = -3220002961, tmp))|(-2840620221.747431))%((x/(tmp = 3153915610, tmp))>>>(tmp = 2018941558, tmp)))>>>x));
-  assertEquals(-0, x *= (-231994402.93764925));
-  assertEquals(0, x <<= x);
-  assertEquals(0, x %= (tmp = 2702385056.1149964, tmp));
-  assertEquals(0, x <<= (tmp = 378459323, tmp));
-  assertEquals(0, x >>>= ((x&(x&(((-1014963013)<<(x&((tmp = -3110294840, tmp)|(x+(x<<(1129643420))))))+(1093795819.1853619))))+((((tmp = -2295103369.697398, tmp)&(((370501313.43019223)>>>(2465439579))/x))-x)>>x)));
-  assertEquals(0, x /= ((tmp = 1779625847, tmp)+(tmp = -662459654.6908865, tmp)));
-  assertEquals(0, x -= x);
-  assertEquals(0, x %= ((tmp = 2723291421, tmp)|(277246502.4027958)));
-  assertEquals(0, x ^= (((-2936270162)>>>((((tmp = -2019015609.1648235, tmp)|(47218153))*(-823685284))+x))&(x<<(x*(x|(((tmp = -941955398, tmp)^(tmp = -2365238993.5300865, tmp))-(778674685)))))));
-  assertEquals(0, x >>>= x);
-  assertEquals(NaN, x %= x);
-  assertEquals(0, x &= (-175235975.8858137));
-  assertEquals(-2684493800.1062117, x += (tmp = -2684493800.1062117, tmp));
-  assertEquals(-1290806265.6063132, x -= (-1393687534.4998984));
-  assertEquals(-1290806265, x >>= (((x>>(tmp = -1710112056.4935386, tmp))*(586227650.2860553))<<(tmp = -2918251533.6052856, tmp)));
-  assertEquals(23470008, x >>>= x);
-  assertEquals(1668734969, x |= ((-295560682.9663689)^(x|((((tmp = -1183847364, tmp)&(3135327694))+(1679127747.1406744))-((-1895825528)%((tmp = -3180115006, tmp)+((tmp = 2373812187, tmp)|x)))))));
-  assertEquals(1744306169, x |= (1188503928.5009093));
-  assertEquals(1744306169, x %= (tmp = -2723982401.4997177, tmp));
-  assertEquals(3488612338, x += x);
-  assertEquals(3488612337, x += (((x/(-325849204))>>x)|(-1820624550.9149108)));
-  assertEquals(-1511119305, x ^= (tmp = 1778506182.2952862, tmp));
-  assertEquals(-12211415, x %= (x^(tmp = -54943035, tmp)));
-  assertEquals(-12211415, x %= ((-1267051884)%(-643566443.0122576)));
-  assertEquals(-30.84976063258681, x /= (((1052047194)>>>x)&(1495698235.5117269)));
-  assertEquals(-61.69952126517362, x += x);
-  assertEquals(-244, x <<= (x^(x+(tmp = -2822258210.076373, tmp))));
-  assertEquals(-6652, x &= ((tmp = 2593685093, tmp)>>((((2047688852.4609032)<<((x*(-611076291))*x))^(-2665364024.817528))>>>(165267874))));
-  assertEquals(0, x -= x);
-  assertEquals(0, x /= (2454186758));
-  assertEquals(0, x &= (tmp = -2226895206, tmp));
-  assertEquals(0, x += x);
-  assertEquals(-21390701, x += ((-1369004846.0816503)>>(tmp = -2661552634.039692, tmp)));
-  assertEquals(-0.012568536912921919, x /= (1701924507.856429));
-  assertEquals(7.09517966608176e-11, x /= (tmp = -177141911.8955555, tmp));
-  assertEquals(0, x >>= (tmp = 231535697, tmp));
-  assertEquals(1383687797, x ^= (tmp = -2911279499.568808, tmp));
-  assertEquals(1383687797, x %= (tmp = -2258636646.5294995, tmp));
-  assertEquals(1319, x >>= ((tmp = -2549411892.8426056, tmp)/(((((1532476676)^(153720871.82640445))+x)/(((2988190456.3206205)&(tmp = -2920873674, tmp))-(((((tmp = -1044518167.0581458, tmp)>>x)-((((tmp = -194701879.13505793, tmp)&(498352051))&((tmp = -2167339635.6529818, tmp)^(((x>>(tmp = 700159851, tmp))*(tmp = 2874921158, tmp))/x)))-((2856128689)|((-1876321441)>>>(2110732915)))))^((((tmp = -193379494.18825436, tmp)/(-3055182489.533142))<<x)+((tmp = -2286109605, tmp)>>(tmp = 698475484.3987849, tmp))))^(3182231653.500364))))|(((tmp = -194670835, tmp)>>>((786780139)%(((2114171416.2305853)^(1703145352.8143656))/x)))>>>((tmp = -3029462067, tmp)>>((67647572.02624655)&(x*(-2394283060))))))));
-  assertEquals(13903855, x |= ((tmp = -2515306586, tmp)>>>x));
-  assertEquals(54311, x >>>= ((-2413722658)-((tmp = -2159787584, tmp)^(tmp = 949937622.9744623, tmp))));
-  assertEquals(108622, x += x);
-  assertEquals(1250717187, x ^= ((tmp = 842692148, tmp)+(((2649331689.694273)<<x)-(tmp = -2992181273, tmp))));
-  assertEquals(4536777, x %= (tmp = 73304730, tmp));
-  assertEquals(0, x -= x);
-  assertEquals(-580081499, x ^= ((tmp = -580081499.0170684, tmp)^(x%(tmp = -1542730817.88261, tmp))));
-  assertEquals(-1382738784, x <<= x);
-  assertEquals(-1382738784, x <<= x);
-  assertEquals(2912228512, x >>>= (x*(x>>>x)));
-  assertEquals(-1076374105, x |= (2589443367));
-  assertEquals(-0.2818750938197037, x /= (((tmp = -1559525732.9603848, tmp)|(-477068917.5483327))>>>((-688616257)*((((tmp = -1192490153.1226473, tmp)*(-502280624.0265591))<<(-442688727.4881985))%(x+(((((tmp = -2948836853.831935, tmp)-(tmp = -2850398330.910424, tmp))>>>(x>>>(-1947835558)))^x)+(x*x)))))));
-  assertEquals(2032826546, x |= (tmp = 2032826546.819327, tmp));
-  assertEquals(3408404827.14316, x += (tmp = 1375578281.1431599, tmp));
-  assertEquals(258183922.14315987, x %= (tmp = 350024545, tmp));
-  assertEquals(479694848, x <<= (tmp = -481187157, tmp));
-  assertEquals(-2147483648, x <<= (((tmp = -2956588045.472398, tmp)>>>(((tmp = -1838455399.1775856, tmp)&(((((tmp = -637547, tmp)/x)&(x^((-44876328.1767962)+(((-2059598286)-(1071496688))%(tmp = -1492254402, tmp)))))-(x%x))*(x|x)))>>(1226250760)))<<x));
-  assertEquals(-2288163338.9020815, x -= (140679690.9020816));
-  assertEquals(4954833118513997000, x *= (-2165419327.4906025));
-  assertEquals(1578331238, x ^= (-2410854298.2270393));
-  assertEquals(-810627292, x += (-2388958530));
-  assertEquals(-810627292, x ^= ((1495296640.4087524)/(tmp = 1561790291, tmp)));
-  assertEquals(657116606535253200, x *= x);
-  assertEquals(0.675840332689047, x %= (((-1816548473)^(((tmp = -151918689.19451094, tmp)|(1819911186.535233))/((((((1514297447)+(tmp = 856485190.9684253, tmp))&(((1809369464.4363992)<<(493538496))*x))+((x*(x>>(x&(tmp = 222293461, tmp))))>>>(((784519621)|x)^((-580766922)>>(tmp = -947264116, tmp)))))>>>((((2794210354.22964)>>>(((2896952532.0183973)*((x+(tmp = -1813175940, tmp))<<(tmp = -1302618293, tmp)))&x))>>(x-(((x|((1456466890.1952953)*x))^(-169979758.19158387))-(x-x))))>>x))&(tmp = 2671604078.3026733, tmp))))/(-1701675745)));
-  assertEquals(0.675840332689047, x %= ((tmp = 2421871143, tmp)^x));
-  assertEquals(NaN, x %= ((((tmp = 1175526323.433271, tmp)+(tmp = 2813009575.952405, tmp))%((tmp = -3112133516.3303423, tmp)&x))&((((((-424329392)^(tmp = 1430146361, tmp))+x)-(1533557337.268306))%((tmp = -3117619446, tmp)-(-3127129232)))>>>x)));
-  assertEquals(NaN, x += x);
-  assertEquals(0, x >>>= ((1710641057.7325037)%(104961723.56541145)));
-  assertEquals(0, x <<= (tmp = -970072906, tmp));
-  assertEquals(0, x *= (87768668));
-  assertEquals(-1464968122, x ^= (tmp = -1464968122, tmp));
-  assertEquals(-1467983895, x ^= ((tmp = -1204896021, tmp)>>>(((91792661)&(x>>>(((-2364345606)>>>x)*x)))+x)));
-  assertEquals(2.991581508270506, x /= (-490704963.5591147));
-  assertEquals(0, x >>>= x);
-  assertEquals(0, x >>= ((tmp = 639854873, tmp)%(tmp = 743486160.3597239, tmp)));
-  assertEquals(0, x <<= (tmp = 1045577245.3403939, tmp));
-  assertEquals(0, x >>= ((tmp = -1932462290, tmp)|(tmp = 1629217987, tmp)));
-  assertEquals(517617438, x ^= ((tmp = 2737789043, tmp)%(tmp = -2220171604.135681, tmp)));
-  assertEquals(126371, x >>>= ((tmp = 205210223.69909227, tmp)-(tmp = 598118404, tmp)));
-  assertEquals(918548455, x |= ((918228734.8363427)+(x+x)));
-  assertEquals(918548455, x |= ((tmp = 599828198, tmp)>>((tmp = -851081330, tmp)|(tmp = -1152596996.8443217, tmp))));
-  assertEquals(918548443.7739062, x -= ((tmp = 1497642976.2260938, tmp)%(x>>(tmp = -548469702.5849569, tmp))));
-  assertEquals(0.7739062309265137, x %= (x&x));
-  assertEquals(2317939163.8239403, x *= (tmp = 2995116296, tmp));
-  assertEquals(1014415360, x <<= (-279972114));
-  assertEquals(0, x &= ((296810932)/(x*(tmp = -2750499950, tmp))));
-  assertEquals(0, x *= (x%((126285451.05086231)>>>(x*(tmp = -2789790532, tmp)))));
-  assertEquals(0, x >>>= ((975695102.5771483)%(x-((-1011726540)-((tmp = 2223194882, tmp)/x)))));
-  assertEquals(-1747794584, x |= (-1747794584.3839395));
-  assertEquals(-543544679, x %= (tmp = -1204249905, tmp));
-  assertEquals(-543544679, x %= (-881024001));
-  assertEquals(1, x /= x);
-  assertEquals(-1879376393, x |= ((tmp = 161643764, tmp)|(tmp = 2281346499.9084272, tmp)));
-  assertEquals(1.321124264431369, x /= (-1422558379.7061746));
-  assertEquals(1, x >>>= (x&(tmp = -963118950.4710281, tmp)));
-  assertEquals(3, x ^= ((x+x)/x));
-  assertEquals(1, x /= x);
-  assertEquals(1, x &= (2090796073));
-  assertEquals(-1284301873, x ^= (((-11041168.146357536)+(tmp = -1273260707.8134556, tmp))+x));
-  assertEquals(292559045, x &= (x&((-2401110739)^((tmp = 630802904, tmp)^(((1012634447.0346229)+x)%((tmp = -1240091095, tmp)%(x/(-1483936527))))))));
-  assertEquals(0, x %= x);
-  assertEquals(0, x /= (tmp = 613145428.3653506, tmp));
-  assertEquals(0, x /= ((x-(tmp = 3116638456, tmp))*(-973300716)));
-  assertEquals(0, x %= (tmp = -1794741286.0464535, tmp));
-  assertEquals(0, x &= x);
-  assertEquals(0, x >>= (-551370105.0746605));
-  assertEquals(-1471996874, x ^= ((2822970422.2331414)-x));
-  assertEquals(-277914313, x |= (tmp = -818980601.2544096, tmp));
-  assertEquals(-34, x >>= x);
-  assertEquals(305422768, x -= (-305422802));
-  assertEquals(-2406146240, x += (tmp = -2711569008, tmp));
-  assertEquals(1073745408, x &= (tmp = -3046625618, tmp));
-  assertEquals(1073745408, x <<= ((-1234108306.7646303)<<((-233519302)|x)));
-  assertEquals(1073745408, x %= (tmp = 1898831268, tmp));
-  assertEquals(1073745408, x <<= (((tmp = 3089406038, tmp)/x)&(-2960027680)));
-  assertEquals(65536, x >>>= (2858188366));
-  assertEquals(128, x >>>= ((-2640257239.857275)%((tmp = -3185405235.3177376, tmp)*x)));
-  assertEquals(128, x >>>= x);
-  assertEquals(128, x -= (x&(x-(tmp = -247588018, tmp))));
-  assertEquals(81616906825.07776, x *= (tmp = 637632084.57092, tmp));
-  assertEquals(78860097686.07776, x -= (((1507215684)^((709254783)+(((x<<x)*((-2890828152.667641)%(2537817529.2041526)))^x)))+(3114024487)));
-  assertEquals(-2920545695.721283, x += (((tmp = -2555437435, tmp)>>>x)-((2920546109.72129)+x)));
-  assertEquals(-2879412281.721283, x += ((-1662428756)>>>(tmp = -1928491386.6926208, tmp)));
-  assertEquals(67403845, x &= (tmp = 2921644117, tmp));
-  assertEquals(16850961, x >>>= (((-1039328365)>>>(tmp = -768615112, tmp))<<((1037261855)*(tmp = -2906902831.4797926, tmp))));
-  assertEquals(0, x ^= x);
-  assertEquals(0, x *= ((-2729056530)/((-1776175111)%(1493002300.4604707))));
-  assertEquals(0, x *= (tmp = 370696035.22912216, tmp));
-  assertEquals(0, x ^= x);
-  assertEquals(0, x |= ((((((tmp = -1541196993, tmp)^x)/(854730380.1799632))/(2879117705.492209))+((((-2892068577)^(-2460614446.1044483))>>>((743413943)<<(-1285280084.4220598)))/(tmp = -1719994579.5141463, tmp)))%(((((tmp = 2522797851.088227, tmp)<<(tmp = 2257160597.1538725, tmp))/(-680406007))&((x>>>(tmp = -260350730, tmp))^(tmp = 1920522110.852598, tmp)))>>(-697620442))));
-  assertEquals(0, x &= x);
-  assertEquals(-591399642.958673, x += (x-(tmp = 591399642.958673, tmp)));
-  assertEquals(27, x >>>= (tmp = -726721317.2109983, tmp));
-  assertEquals(-2043736843, x -= (2043736870));
-  assertEquals(-3991674, x >>= (tmp = 1098126089, tmp));
-  assertEquals(-997919, x >>= ((x%(((x*(((-1497329257.1781685)%(2334511329.2690516))/(-3072526140.6635056)))+(-1843998852))-(tmp = 240300314.34070587, tmp)))+(714080860.6032693)));
-  assertEquals(-0, x %= x);
-  assertEquals(NaN, x /= x);
-  assertEquals(0, x >>= (tmp = 538348328.5363884, tmp));
-  assertEquals(0, x *= (800317515));
-  assertEquals(0, x -= x);
-  assertEquals(0, x >>= (984205514));
-  assertEquals(857282491, x += (tmp = 857282491, tmp));
-  assertEquals(587792897, x &= (tmp = 2951307845.164059, tmp));
-  assertEquals(595301269, x |= (tmp = 24285588.90314555, tmp));
-  assertEquals(1190602538, x += x);
-  assertEquals(0, x -= x);
-  assertEquals(-442423060, x |= ((x^((x-(tmp = 2342497475.637024, tmp))%(-1900074414.7678084)))|((tmp = 1932380130, tmp)%(x%(2291727569.817062)))));
-  assertEquals(-442423060, x %= (((tmp = 703479475.545413, tmp)>>(x-x))<<(2435723056.753845)));
-  assertEquals(1, x /= x);
-  assertEquals(0, x >>= x);
-  assertEquals(-1265317851, x |= (tmp = -1265317851, tmp));
-  assertEquals(-2, x >>= (-2015895906.8256726));
-  assertEquals(-0, x %= x);
-  assertEquals(-0, x %= (((1219237746)+(284683029))*(((tmp = 2288119628, tmp)|(-404658161.2563329))*(-265228691.74142504))));
-  assertEquals(1039509109, x -= (-1039509109));
-  assertEquals(2079018218, x += x);
-  assertEquals(-1979.9362673719077, x /= ((3219723500)>>x));
-  assertEquals(-62, x >>= ((x/(326466691))*(tmp = -607654070, tmp)));
-  assertEquals(-45, x |= (tmp = -2954888429.549882, tmp));
-  assertEquals(-1180929712, x &= (3114037588.570232));
-  assertEquals(815550480, x &= (-2302684143.3378315));
-  assertEquals(815550480, x %= (-2177479570));
-  assertEquals(815550480, x %= (tmp = 2895822167, tmp));
-  assertEquals(815550480, x %= (-1247621230.5438688));
-  assertEquals(283929811, x -= ((tmp = 251831053.17096448, tmp)|((tmp = 1140463506.004994, tmp)+(tmp = -743224673.546309, tmp))));
-  assertEquals(1825767424, x <<= (((tmp = 1732353599, tmp)^(tmp = 658726044, tmp))>>>((-2827889370.932477)%(tmp = 1950139204.3291233, tmp))));
-  assertEquals(1828450414, x |= (tmp = 1618538606, tmp));
-  assertEquals(0, x <<= (-2411670689.045702));
-  assertEquals(0, x <<= (-27744888.428537607));
-  assertEquals(-0, x /= (tmp = -1597552450, tmp));
-  assertEquals(0, x >>>= (((2165722776.7220936)>>>(tmp = 1233069931, tmp))>>>(-1120420811)));
-  assertEquals(-0, x *= ((tmp = -1505252656, tmp)>>((((3035637099.6156535)&((467761577.7669761)>>(-361034537)))^(tmp = -2347994840.6541123, tmp))*(tmp = -2191739821, tmp))));
-  assertEquals(0, x &= (795727404.0738752));
-  assertEquals(-0, x *= (tmp = -3125944685.3991394, tmp));
-  assertEquals(-0, x *= (x&x));
-  assertEquals(0, x >>= ((tmp = -2045709233, tmp)^x));
-  assertEquals(NaN, x /= (x>>(x/(3102894071))));
-  assertEquals(NaN, x += ((tmp = 2149079756.8941655, tmp)-(tmp = 810121645.305179, tmp)));
-  assertEquals(0, x >>>= (-859842989));
-  assertEquals(0, x >>>= (tmp = 2530531143.9369526, tmp));
-  assertEquals(0, x >>= (((-932981419.6254237)|(tmp = 1591591715, tmp))>>>(x+((3149795006)>>>(tmp = 613352154, tmp)))));
-  assertEquals(-4294967295, x -= ((((-2289331668)%(-282648480.0078714))>>(-1373720705.5142756))>>>((tmp = 15511563.517014384, tmp)/(360279080))));
-  assertEquals(1, x &= x);
-  assertEquals(0, x >>= (x^(-2791872557.5190563)));
-  assertEquals(0, x &= ((tmp = 336466956.7847167, tmp)>>((1235728252.053619)|(x<<((1828176636.13488)%x)))));
-  assertEquals(-0, x *= (-364042830.8894656));
-  assertEquals(0, x >>>= x);
-  assertEquals(-1675298680, x |= ((2323049541.321387)+(296619075)));
-  assertEquals(-0, x %= x);
-  assertEquals(-1583048579.4420977, x += (-1583048579.4420977));
-  assertEquals(0, x -= x);
-  assertEquals(-2, x ^= ((603171992.0545617)/(((-271888695.718297)%(tmp = -400159585, tmp))^((((tmp = 1536123971, tmp)-(tmp = -2310418666.6243773, tmp))|((tmp = 2242779597.1219435, tmp)<<(tmp = 1758127684.4745512, tmp)))/x))));
-  assertEquals(-2, x &= (x&x));
-  assertEquals(0, x &= ((tmp = -1098806007.4049063, tmp)/(((2862384059.3229523)/((((tmp = -92960842, tmp)-(x>>(tmp = 1244068344.2269042, tmp)))&x)*(tmp = -1919148313, tmp)))<<(-2486665929))));
-  assertEquals(0, x &= x);
-  assertEquals(-1441272634.582818, x -= (1441272634.582818));
-  assertEquals(-3, x >>= (tmp = 3186393693.7727594, tmp));
-  assertEquals(-1206855850, x ^= (((tmp = 607979495.303539, tmp)-(tmp = -2480131951, tmp))^(x*((tmp = 1324153477, tmp)/((1248126288)+(x|(1917331780.0741704)))))));
-  assertEquals(-1206855853, x ^= (x>>>(653288765.1749961)));
-  assertEquals(-1206857725, x &= (3149461539.6019173));
-  assertEquals(3088109571, x >>>= (x*(x<<(tmp = 1543540084, tmp))));
-  assertEquals(536903680, x &= (tmp = 644851760, tmp));
-  assertEquals(536903674.312194, x += (((-3183290076)-((tmp = 40738191.12097299, tmp)-x))/((x>>>(3151371851.9408646))^(tmp = 472698205.22445416, tmp))));
-  assertEquals(2127424750.0506563, x -= (tmp = -1590521075.7384624, tmp));
-  assertEquals(2127424750.0506563, x %= (tmp = 3027273433.361373, tmp));
-  assertEquals(0, x >>= (x>>(1445204441.702043)));
-  assertEquals(NaN, x %= (x<<x));
-  assertEquals(0, x ^= ((tmp = -2903841152.136344, tmp)-(x%(2938662860))));
-  assertEquals(0, x <<= (x<<x));
-  assertEquals(0, x >>>= (tmp = -979481631.33442, tmp));
-  assertEquals(0, x >>= x);
-  assertEquals(0, x &= (((x%((((((tmp = 1657446354.6820035, tmp)>>(-1916527001.2992697))/x)>>(tmp = 1450467955, tmp))&(277676820))+(x/(-945587805))))/((tmp = -690095354, tmp)^x))+(tmp = -2651195021, tmp)));
-  assertEquals(0, x <<= (752343428.2934296));
-  assertEquals(0, x /= (tmp = 3022310299, tmp));
-  assertEquals(0, x >>= (x%((388245402)>>>x)));
-  assertEquals(NaN, x %= x);
-  assertEquals(NaN, x %= ((tmp = 1205123529.8649468, tmp)>>>(-2848300932)));
-  assertEquals(0, x >>= ((x>>>x)<<(tmp = 487841938, tmp)));
-  assertEquals(0, x *= (((273436000.9463471)|(tmp = 141134074.27978027, tmp))^(tmp = 1220326800.7885802, tmp)));
-  assertEquals(1525600768, x |= (((x^(-2674777396))-(tmp = 1966360716.3434916, tmp))<<(794782595.9340223)));
-  assertEquals(761927595, x %= (tmp = -763673173, tmp));
-  assertEquals(1.1353588586934338, x /= ((x&((-1897159300.4789193)*(-348338328.0939896)))&(978680905.6470605)));
-  assertEquals(8.631173314966319e-10, x /= (1315416592));
-  assertEquals(0, x >>= ((tmp = -2581239435, tmp)-((-628818404.1122074)<<x)));
-  assertEquals(0, x -= x);
-  assertEquals(0, x *= (2925158236));
-  assertEquals(0, x /= (x+(tmp = 1405531594.0181243, tmp)));
-  assertEquals(0, x *= (2712022631.230831));
-  assertEquals(0, x >>= (tmp = 80518779.81608999, tmp));
-  assertEquals(1953477932.8046472, x += (tmp = 1953477932.8046472, tmp));
-  assertEquals(1953477932, x >>= (tmp = 3025539936, tmp));
-  assertEquals(1953477932, x -= ((-2675119685.8812313)>>(x/(-1808264410.9754841))));
-  assertEquals(1292620430, x += ((-660857502)%((((tmp = -698782819, tmp)%(tmp = 2847304199, tmp))<<(-2423443217.1315413))+x)));
-  assertEquals(78895, x >>>= x);
-  assertEquals(2, x >>= x);
-  assertEquals(2, x <<= (tmp = 1313641888.8301702, tmp));
-  assertEquals(1857416935.2532766, x += (tmp = 1857416933.2532766, tmp));
-  assertEquals(-1677721600, x <<= (tmp = -2482476902, tmp));
-  assertEquals(309226853.62854385, x -= (tmp = -1986948453.6285439, tmp));
-  assertEquals(33965156, x &= (2409088742));
-  assertEquals(Infinity, x /= (x-(x<<((x/(tmp = -3106546671.536726, tmp))/((tmp = 2695710176, tmp)-((((-2102442864)&(857636911.7079853))/x)%(-65640292)))))));
-  assertEquals(1270005091, x |= (tmp = 1270005091.0081215, tmp));
-  assertEquals(1270005091, x %= (tmp = -1833876598.2761571, tmp));
-  assertEquals(158750636, x >>>= x);
-  assertEquals(-1000809106.0879555, x -= (tmp = 1159559742.0879555, tmp));
-  assertEquals(72400936, x &= ((2448271389.3097963)%(tmp = 1517733861, tmp)));
-  assertEquals(282816, x >>= x);
-  assertEquals(282816, x %= (tmp = 3192677386, tmp));
-  assertEquals(0.00021521351827207216, x /= (1314118194.2040696));
-  assertEquals(Infinity, x /= (((tmp = 2822091386.1977024, tmp)&x)%(tmp = -3155658210, tmp)));
-  assertEquals(NaN, x %= (-359319199));
-  assertEquals(0, x >>>= (((tmp = -2651558483, tmp)-(x<<(tmp = 2537675226.941645, tmp)))<<(tmp = 667468049.0240343, tmp)));
-  assertEquals(-0, x *= (tmp = -2827980482.12998, tmp));
-  assertEquals(-0, x %= (((tmp = -689972329.3533998, tmp)>>>x)|(tmp = -7488144, tmp)));
-  assertEquals(0, x >>>= x);
-  assertEquals(0, x |= x);
-  assertEquals(-2410373675.2262926, x -= (2410373675.2262926));
-  assertEquals(1840423, x >>= ((-1081642113)^x));
-  assertEquals(-4829451429403412, x *= (-2624098606.35485));
-  assertEquals(-94552231, x %= (tmp = -97015883, tmp));
-  assertEquals(-94433287, x ^= (((tmp = -2297735280, tmp)&(((tmp = 2261074987.7072973, tmp)%((((2565078998)^(-2573247878))|x)|(((tmp = -2120919004.7239416, tmp)>>(tmp = -579224101, tmp))>>>(1905808441))))*(x|(3149383322))))>>(542664972)));
-  assertEquals(0, x ^= (x<<(tmp = -3112569312, tmp)));
-  assertEquals(0, x <<= (-2141934818.7052917));
-  assertEquals(0, x >>= (tmp = -2539525922, tmp));
-  assertEquals(-434467613, x ^= (tmp = -434467613, tmp));
-  assertEquals(-274792709, x |= (1233452601.462551));
-  assertEquals(-274726917, x |= (-2130333750));
-  assertEquals(-272629761, x |= (-1516071602.5622227));
-  assertEquals(-272629761, x |= ((tmp = 3012131694, tmp)&((tmp = -2595342375.8674774, tmp)-((tmp = -2710765792, tmp)>>>((x-(tmp = 2397845540, tmp))+(2496667307))))));
-  assertEquals(-4194305, x |= (1343705633.165825));
-  assertEquals(4190207, x >>>= ((tmp = 276587830, tmp)*((tmp = -1517753936, tmp)>>x)));
-  assertEquals(0, x >>= (x|((2247486919)-((-1664642412.4710495)*((((tmp = -358185292.17083216, tmp)-(tmp = -1472193444, tmp))*(tmp = 2699733752, tmp))&((x|(x<<(1137610148.1318119)))>>(((375089690.8764564)*x)&(tmp = 859788933.9560187, tmp))))))));
-  assertEquals(0, x %= (3080673960));
-  assertEquals(0, x >>>= (1328846190.1963305));
-  assertEquals(1249447579, x |= (-3045519717.580775));
-  assertEquals(-0.8743931060971377, x /= (-1428931187));
-  assertEquals(1, x |= ((tmp = -1756877535.7557893, tmp)/((-142900015.93200803)<<(1414557031.347334))));
-  assertEquals(759627265, x ^= (759627264.0514802));
-  assertEquals(741823, x >>= (1106391210));
-  assertEquals(610451, x &= ((x>>>((919849416)+((tmp = -427708986, tmp)^((x%x)|(tmp = -2853100288.932063, tmp)))))*x));
-  assertEquals(372650423401, x *= x);
-  assertEquals(410404493, x >>>= ((((-1425086765)>>>x)>>((2813118707.914771)>>(-424850240)))^x));
-  assertEquals(120511585729013, x *= ((tmp = -1889454669, tmp)>>>x));
-  assertEquals(120513295294304.22, x -= (tmp = -1709565291.2115698, tmp));
-  assertEquals(6164, x >>>= ((2244715719.397763)^(tmp = -741235818.6903033, tmp)));
-  assertEquals(937572790.468221, x -= (tmp = -937566626.468221, tmp));
-  assertEquals(937572790, x |= ((2129102867.156146)*(x%x)));
-  assertEquals(32, x &= ((2700124055.3712993)>>>((1977241506)>>>(-2915605511))));
-  assertEquals(32, x %= (tmp = -2513825862, tmp));
-  assertEquals(0, x <<= (-1379604802));
-  assertEquals(0, x >>>= (tmp = -1033248759, tmp));
-  assertEquals(-1151517050, x ^= (3143450246));
-  assertEquals(-180577, x |= ((738373819.4081701)^(-357134176)));
-  assertEquals(-0, x %= x);
-  assertEquals(-2086887759, x |= (tmp = 2208079537, tmp));
-  assertEquals(-2, x >>= (1460216478.7305799));
-  assertEquals(-2, x %= ((-1979700249.0593133)^(-3156454032.4790583)));
-  assertEquals(-256, x <<= ((1810316926)>>>(tmp = 414362256, tmp)));
-  assertEquals(-1, x >>= (((((((-1616428585.595561)*((tmp = 2574896242.9045777, tmp)|(86659152.37838173)))>>(((tmp = 2476869361, tmp)&((x+((tmp = -2445847462.1974697, tmp)>>(tmp = -1960643509.5255682, tmp)))+(x|(((((2231574372.778028)|(tmp = 1824767560, tmp))>>>((1108035230.2692142)|(tmp = 2354035815, tmp)))/((tmp = -2602922032, tmp)>>(-925080304.7681987)))-x))))-(x>>x)))>>>((tmp = 751425805.8402164, tmp)|(tmp = 1165240270.3437088, tmp)))-x)*(2870745939))-(x>>>((tmp = 2986532631.405425, tmp)>>>(((tmp = 2547448699, tmp)+(((((x<<(((((-2756908638.4197435)>>>(3134770084))-(-1147872642.3756688))%(x*(tmp = -282198341.6600039, tmp)))+(-770969864.2055655)))+((-2725270341)^x))/(-3093925722))>>(x&x))>>((tmp = -2705768192, tmp)>>>(((tmp = 577253091.6042917, tmp)/(((x&(((((x+x)>>>(-1000588972))/(x&(717414336)))^(tmp = 428782104.21504414, tmp))>>>(1084724288.953223)))%(tmp = -2130932217.4562194, tmp))&x))-(-286367389)))))+((x>>(tmp = 2001277117, tmp))>>((tmp = 1028512592, tmp)^((tmp = 2055148650, tmp)+((tmp = 1490798399, tmp)/(tmp = -2077566434.2678986, tmp))))))))));
-  assertEquals(-1, x |= (tmp = 1542129482, tmp));
-  assertEquals(-671816743, x &= (tmp = -671816743.9111726, tmp));
-  assertEquals(-1840333080, x -= (1168516337));
-  assertEquals(-1755382023, x |= ((((tmp = 2625163636.0142937, tmp)>>>((tmp = 1534304735, tmp)^x))-(tmp = -1959666777.9995313, tmp))%x));
-  assertEquals(-1750421896, x += (x>>>(tmp = -1364828055.1003118, tmp)));
-  assertEquals(-72864007, x %= (tmp = 239651127, tmp));
-  assertEquals(-72863956, x -= (((tmp = -1103261657.626319, tmp)*((tmp = 2789506613, tmp)+((tmp = 2294239314, tmp)>>>(2588428607.5454817))))>>x));
-  assertEquals(-170337477, x -= (tmp = 97473521, tmp));
-  assertEquals(-170337477, x |= (((tmp = 246292300.58998203, tmp)/(((tmp = -2664407492, tmp)|((-2416228818)^(tmp = 909802077, tmp)))%(tmp = 532643021.68109465, tmp)))/(tmp = 1015597843.8295637, tmp)));
-  assertEquals(1, x >>>= (((tmp = -2247554641.7422867, tmp)/(1186555294))%(tmp = -785511772.3124621, tmp)));
-  assertEquals(1188939891.668705, x -= (tmp = -1188939890.668705, tmp));
-  assertEquals(1188939891, x &= x);
-  assertEquals(1188413555, x &= (((tmp = -372965330.5709038, tmp)%(((tmp = 3108909487, tmp)|(x^(-1056955571.9951684)))^(-1549217484.009048)))/(x>>>(1403428437.9368362))));
-  assertEquals(-0.7343692094664643, x /= (-1618278026.4758227));
-  assertEquals(0, x -= x);
-  assertEquals(0, x &= (-2701762139.7500515));
-  assertEquals(0, x >>>= (((-1692761485.2299166)^x)+(tmp = -1221349575.938864, tmp)));
-  assertEquals(0, x <<= ((2148160230)<<x));
-  assertEquals(0, x <<= (((x<<(-740907931.38363))&(tmp = -930960051.6095045, tmp))>>(x/((tmp = -1921545150.1239789, tmp)/(-3015379806)))));
-  assertEquals(0, x <<= x);
-  assertEquals(NaN, x /= (x|x));
-  assertEquals(0, x >>= (tmp = -2265988773, tmp));
-  assertEquals(-0, x *= (((x<<(-928153614))<<(-989694208))^(2544757713.481016)));
-  assertEquals(0, x >>= ((tmp = 578009959.5299993, tmp)>>x));
-  assertEquals(0, x /= ((((tmp = 412689800.0431709, tmp)&(1630886276))*(tmp = 2028783080.7296097, tmp))/x));
-  assertEquals(0, x |= ((((x*(-2197198786))>>((2719887264.761987)<<(tmp = 2253246512, tmp)))-(tmp = -150703768.07045603, tmp))/(((-3160098146)%(((((1486098047.843547)>>(((tmp = -593773744.1144242, tmp)&(x<<(2651087978)))|((-680492758.930413)>>(tmp = 88363052.13662052, tmp))))<<x)<<(tmp = 2232672341, tmp))/((x<<x)&(((((348589117.64135563)<<(-1010050456.3097556))^(x/(tmp = -2282328795, tmp)))-(tmp = 1653716293, tmp))-((3157124731)/((tmp = 3007369535.341745, tmp)%(tmp = -2246556917, tmp)))))))+x)));
-  assertEquals(0, x >>= ((1935211663.5568764)>>(x-(tmp = 2116580032, tmp))));
-  assertEquals(-1725272693, x ^= (tmp = -1725272693, tmp));
-  assertEquals(313683, x >>>= (-1782632531.2877684));
-  assertEquals(0.009772287443565642, x /= (tmp = 32099240, tmp));
-  assertEquals(-647945916.9902277, x += (-647945917));
-  assertEquals(3647021380, x >>>= ((((((((2470411371.688199)<<x)>>x)-(x>>>((tmp = 1750747780, tmp)/x)))-x)<<(tmp = -2666186351.695101, tmp))^(((tmp = 2749205312.6666174, tmp)%x)&(2069802830.360536)))<<(tmp = 6051917.9244532585, tmp)));
-  assertEquals(-647939220, x |= ((x>>>((tmp = -2980404582.794245, tmp)>>>(-996846982)))^x));
-  assertEquals(-572178450, x |= ((-800571300.3277931)+(tmp = 2084365671, tmp)));
-  assertEquals(1172311208, x &= (x&((tmp = -1207487657.8953774, tmp)^x)));
-  assertEquals(12176516458994, x += ((((tmp = -1534997221, tmp)%(412142731))*((tmp = 2958726303, tmp)>>(1489169839)))+(((-574726407.2051775)>>>(((1772885017)<<(947804536.9958035))>>(-2406844737)))>>x)));
-  assertEquals(-1480065024, x <<= x);
-  assertEquals(-1736999042.227129, x += (tmp = -256934018.22712898, tmp));
-  assertEquals(-1338699394, x ^= ((((((x%(((tmp = -2551168455.222048, tmp)|(3213507293.930222))/((-1559278033)>>((tmp = 3107774495.3698573, tmp)-(2456375180.8660913)))))*((x*(tmp = 1088820004.8562922, tmp))+((tmp = 1850986704.9836102, tmp)%(tmp = -1226590364, tmp))))*(1786192008))&(((2193303940.310299)%(tmp = 1041726867.0602217, tmp))|((2210722848)/((-1293401295.6714435)&((tmp = 3052430315, tmp)|x)))))>>>(tmp = -2028014470.1524236, tmp))+(((1695818039.0383925)<<((1669068145)*(-2746592133.899276)))<<(tmp = 519092169, tmp))));
-  assertEquals(-334674849, x >>= (1170377794));
-  assertEquals(-10214, x >>= ((tmp = 1074704264.3712895, tmp)>>>((tmp = -1200860192, tmp)^((tmp = 539325023.4101218, tmp)*((tmp = -588989295, tmp)|x)))));
-  assertEquals(1384169472, x &= (1384171140));
-  assertEquals(1384169472, x >>>= ((tmp = -2161405973.830981, tmp)*(tmp = 2054628644, tmp)));
-  assertEquals(1610140972, x |= (527961388));
-  assertEquals(1073273198, x += ((tmp = -259650225.71344328, tmp)&(tmp = -344359694, tmp)));
-  assertEquals(65507, x >>= ((x<<((tmp = 2925070713.5245204, tmp)%(x+((tmp = -1229447799, tmp)/(((x/(x|(((-2337139694)|((((((2996268529.7965417)&x)%(((tmp = -1088587413, tmp)>>(-1384104418.90339))>>((tmp = -1643984822.3946526, tmp)+x)))%(((1118125268.4540217)-((((-1975051668.6652594)-(-704573232))+((tmp = 1674952373, tmp)/(tmp = 1321895696.0062659, tmp)))*(tmp = 1820002533.2021284, tmp)))>>>(tmp = -583960746.9993203, tmp)))|((tmp = -2577675508.550925, tmp)&x))/(tmp = 1459790066, tmp)))/(((((1051712301.7804044)&(tmp = -2726396354, tmp))^(tmp = 263937254.18934345, tmp))+(((x^x)*(((tmp = -2289491571, tmp)+x)%(-2239181148)))&x))>>(tmp = -1743418186.3030887, tmp)))))/(tmp = 1475718622, tmp))<<x)))))|(x&((((tmp = -2934707420, tmp)<<x)/x)^(1022527598.7386684)))));
-  assertEquals(2047, x >>= (x-(tmp = 2300626270, tmp)));
-  assertEquals(8384512, x <<= (tmp = -1917680820, tmp));
-  assertEquals(0, x <<= (2393691134));
-  assertEquals(0, x >>= x);
-  assertEquals(649995936.5853252, x -= (tmp = -649995936.5853252, tmp));
-  assertEquals(649995936, x &= x);
-  assertEquals(-0.33672017582945424, x /= (tmp = -1930374188, tmp));
-  assertEquals(-0.33672017582945424, x += (x&((1208055031)^(-2761287670.968586))));
-  assertEquals(0, x |= x);
-  assertEquals(0, x <<= ((-2038368978)/x));
-  assertEquals(0, x >>= (x&((tmp = 2481378057.738218, tmp)&(x+(1172701643)))));
-  assertEquals(0, x <<= ((x*(((((((tmp = 70690601.3046323, tmp)&(((((((((((x+(x+(x^(3118107461))))<<(264682213.41888392))&(tmp = -709415381.8623683, tmp))%(((((-1840054964)>>>(tmp = -405893120.89603686, tmp))|((-625507229)^(3128979265)))>>(x>>((tmp = -2480442390, tmp)*((x>>(tmp = -421414980.88330936, tmp))>>>((tmp = 1850868592, tmp)&(-2948543832.879225))))))|((2986545185)&((tmp = -1947550706, tmp)%(((tmp = 2590238422.1414256, tmp)/(((tmp = -361038812, tmp)>>x)|(((tmp = 1798444068, tmp)|((x&((tmp = -3104542069, tmp)-x))*((tmp = -1158658918, tmp)+((tmp = 2777031040.5552707, tmp)<<(-2816019335.9008327)))))<<x)))/(((2287795988.231702)/x)/(((-2588712925)>>>(2521189250))*((tmp = -2533527920, tmp)+(tmp = 1762281307.2162101, tmp)))))))))/x)/(tmp = 1047121955.5357032, tmp))|(((-121292251)<<(x^(x-(tmp = 1420006180, tmp))))%((-2278606219)>>>(((tmp = -1412487726, tmp)&(((((tmp = 253596554.16016424, tmp)/(tmp = 2083376247.0079951, tmp))^(x^((1549116789.8449988)>>>((((-1844170084)^(tmp = 1886066422, tmp))&x)<<(34918329)))))^(tmp = -440805555.3369155, tmp))-x))%(-1936512969)))))+(2911511178.4035435))|(1012059391))|(x>>>(tmp = -2551794626.158037, tmp)))+((2926596072.210515)/(tmp = -280299595.0450909, tmp))))&((tmp = 1501086971, tmp)^(tmp = 2114076983, tmp)))-((-1679390574.1466925)-(941349044)))-((x>>x)>>((-2600539474.2033434)+(tmp = 2567056503.9079475, tmp))))*(tmp = 1285896052, tmp))%(((tmp = 1191465410.7595167, tmp)>>((tmp = -2857472754, tmp)%x))>>>(((tmp = 1960819627.6552541, tmp)&(-2651207221.127376))*((((-687312743)+((x>>x)<<x))|((((((1549588195)*((tmp = 2733091019, tmp)^((527322540)<<(x>>x))))%(tmp = -2063962943, tmp))*x)*(734060600))&(-3049417708)))+(((((1084267726)+((x|x)^((tmp = -1917070472.4858549, tmp)%((690016078.9375831)*x))))%((((((tmp = -2091172769, tmp)%(2532365378))>>>(-871354260))/(tmp = 254167019.07825458, tmp))&(1330216175.9871218))>>(tmp = 1931099207, tmp)))^(-1116448185.2618852))>>((961660080.8135855)/x)))))))>>>(-1486048007.7053368)));
-  assertEquals(0, x >>= x);
-  assertEquals(0, x %= (tmp = -1202200444.6506357, tmp));
-  assertEquals(-0, x *= (-527500796.4145117));
-  assertEquals(0, x >>= (tmp = -2082822707, tmp));
-  assertEquals(0, x *= ((-1882398459.290778)>>>x));
-  assertEquals(0, x &= (x/(tmp = -1569332286.392817, tmp)));
-  assertEquals(-390169607, x |= (-390169607.11600184));
-  assertEquals(-780339214, x += x);
-  assertEquals(-780339214, x %= (2765959073));
-  assertEquals(-5954, x >>= (tmp = -1900007055, tmp));
-  assertEquals(743563420, x &= ((((-1520146483.5367205)|(-2075330284.3762321))-(tmp = -2263151872, tmp))%(-1264641939.957402)));
-  assertEquals(1487126840, x += (x>>>(((x+((tmp = -1263274491, tmp)>>>x))&(470419048.0490037))%(tmp = -2642587112, tmp))));
-  assertEquals(Infinity, x /= (x^x));
-  assertEquals(0, x ^= ((tmp = -1436368543, tmp)+(x/(tmp = -1125415374.3297129, tmp))));
-  assertEquals(0, x += x);
-  assertEquals(0, x <<= x);
-  assertEquals(0, x &= (tmp = 3101147204.2905564, tmp));
-  assertEquals(0, x &= (tmp = 2914487586.606511, tmp));
-  assertEquals(0, x += x);
-  assertEquals(0, x -= (((-1738542908.6138556)&(((x+x)-(tmp = -2801153969, tmp))%(tmp = -1206684064.1477358, tmp)))>>((-2575546469.271897)|(tmp = -2573119106, tmp))));
-  assertEquals(-1468808707, x ^= (tmp = -1468808707, tmp));
-  assertEquals(1357349882, x <<= (tmp = -2808501087.7003627, tmp));
-  assertEquals(-572025862, x |= ((((tmp = -2415486246.573399, tmp)/((tmp = -707895732.4593301, tmp)&x))%((-1960091005.0425267)*(972618070.9166157)))-(1649962343)));
-  assertEquals(327213586796843100, x *= (x%(1337884626)));
-  assertEquals(42991616, x &= (-2905576654.1280055));
-  assertEquals(-26049289585042860, x *= (-605915571.6557121));
-  assertEquals(597809748, x >>= ((362850791.077795)/(tmp = 1222777657.4401796, tmp)));
-  assertEquals(597809748, x |= x);
-  assertEquals(770065246, x -= ((-711227660)|(tmp = -508554506, tmp)));
-  assertEquals(593000483097040500, x *= x);
-  assertEquals(0, x %= x);
-  assertEquals(0, x <<= (317862995.456813));
-  assertEquals(0, x >>= ((tmp = 2518385735, tmp)+((-2973864605.267604)/(-930953312.718833))));
-  assertEquals(1227822411, x ^= (x^(1227822411.8553264)));
-  assertEquals(1090520320, x &= (x+((((-2100097959)>>(x/(tmp = -2002285068, tmp)))/(-364207954.9242482))-((tmp = 2771293106.7927113, tmp)-(tmp = -847237774, tmp)))));
-  assertEquals(1090520320, x >>= (((((2439492849)<<((-2932672756.2578926)*((743648426.7224461)+((2942284935)<<((x/(((tmp = 886289462.6565771, tmp)+(-459458622.7475352))>>(tmp = -785521448.4979162, tmp)))|(tmp = -11630282.877367258, tmp))))))-(tmp = -647511106.9602091, tmp))^x)&x));
-  assertEquals(115944291.48829031, x %= (243644007.12792742));
-  assertEquals(1, x /= x);
-  assertEquals(0, x >>>= ((tmp = -819782567, tmp)%(tmp = 2774793208.1994505, tmp)));
-  assertEquals(0, x >>= (tmp = 721096000.2409859, tmp));
-  assertEquals(0, x &= ((x%x)%x));
-  assertEquals(-0, x *= ((-1670466344)<<x));
-  assertEquals(0, x >>= (-677240844.904707));
-  assertEquals(NaN, x %= (((((-1575993236.6126876)/(-2846264078.9581823))^((((-2220459664)-(((-1809496020)>>>(tmp = -3015964803.4566207, tmp))&x))/(tmp = -3081895596.0486784, tmp))>>>(x&x)))%(x^(-1338943139)))^(x-((((2074140963.2841332)^(tmp = 1878485274, tmp))%(((x/(-2568856967.6491556))^x)<<((x+x)^((((2139002721)|(x<<(-1356174045.840464)))>>x)-(tmp = 2305062176, tmp)))))>>>(((((x<<(tmp = -1663280319.078543, tmp))-((1498355849.4158854)-((-1321681257)>>>(tmp = -1321415088.6152222, tmp))))^(-2266278142.1584673))+(858538943))&((((x-((x|(((tmp = -1576599651, tmp)+((tmp = 1595319586, tmp)&(-2736785205.9203863)))>>((x+((-1856237826)+x))<<(tmp = -1590561854.3540869, tmp))))^(((-41283672.55606127)&(tmp = 2971132248, tmp))+x)))/(-849371349.1667476))%(x*((-1705070934.6892798)>>>x)))<<((2418200640)*x)))))));
-  assertEquals(0, x >>>= (tmp = 664214199.5283061, tmp));
-  assertEquals(0, x <<= ((-2827299151)<<(1815817649)));
-  assertEquals(1405772596, x |= (tmp = 1405772596, tmp));
-  assertEquals(-1483422104, x <<= (-2791499935.6822596));
-  assertEquals(-45271, x >>= (1740128943.4254808));
-  assertEquals(-45271, x <<= ((2072269957)-((tmp = -2553664811.4472017, tmp)*(tmp = -2502730352, tmp))));
-  assertEquals(1192951471.6745887, x -= (-1192996742.6745887));
-  assertEquals(-353370112, x <<= (tmp = -1410280844, tmp));
-  assertEquals(0, x ^= (x%((2754092728)*(-1017564599.1094015))));
-  assertEquals(-2662096003.2397957, x -= (tmp = 2662096003.2397957, tmp));
-  assertEquals(-2587094028.50764, x -= (tmp = -75001974.7321558, tmp));
-  assertEquals(6693055512339889000, x *= x);
-  assertEquals(897526784, x %= (x-((tmp = 897526813, tmp)%(-1525574090))));
-  assertEquals(7011928, x >>= ((-440899641.344357)%x));
-  assertEquals(8382047686388683, x += (x*(1195398423.8538609)));
-  assertEquals(16764095372777366, x += x);
-  assertEquals(16764096859576696, x -= (tmp = -1486799329.7207344, tmp));
-  assertEquals(16764099774187724, x += (2914611029));
-  assertEquals(16764102926624664, x -= (-3152436939.724612));
-  assertEquals(-538220648, x |= x);
-  assertEquals(269110324, x /= (((-2114698894.6014318)/(tmp = 767687453, tmp))>>(623601568.1558858)));
-  assertEquals(256, x >>= x);
-  assertEquals(-293446891, x += (x+(-293447403)));
-  assertEquals(119, x >>>= ((1759400753)>>(2481263470.4489403)));
-  assertEquals(14, x >>= (762849027.89693));
-  assertEquals(16, x += (x&(x>>(1104537666.1510491))));
-  assertEquals(-12499808227.980995, x *= (tmp = -781238014.2488122, tmp));
-  assertEquals(1, x /= x);
-  assertEquals(1, x &= x);
-  assertEquals(0, x >>>= ((tmp = 1513381008, tmp)|(tmp = 1593208075.7259543, tmp)));
-  assertEquals(0, x &= (-788154636.2843091));
-  assertEquals(-0, x /= (tmp = -2124830879, tmp));
-  assertEquals(0, x &= (934237436));
-  assertEquals(0, x |= x);
-  assertEquals(-79370942.97651315, x += (-79370942.97651315));
-  assertEquals(-79370942.97651315, x %= ((tmp = -2683255523, tmp)<<(tmp = 2323123280.287587, tmp)));
-  assertEquals(-79370942, x |= x);
-  assertEquals(0.05861647801688159, x /= (-1354072177.061561));
-  assertEquals(0, x <<= (((((((tmp = 1989257036, tmp)&(tmp = 1565496213.6578887, tmp))&x)&(tmp = -2798643735.905287, tmp))&(2354854813.43784))%(tmp = 1118124748, tmp))<<((tmp = 2453617740, tmp)*(((tmp = 1762604500.492329, tmp)<<(-2865619363))%(((2474193854.640994)|((tmp = 1425847419.6256948, tmp)|(((-1271669386)%((x|((tmp = -2059795445.3607287, tmp)+x))*(x*x)))>>>(tmp = -2997360849.0750895, tmp))))/(tmp = 2326894252, tmp))))));
-  assertEquals(0, x >>>= ((-671325215)/((-727408755.8793397)>>(tmp = 315457854, tmp))));
-  assertEquals(0, x >>= (x&x));
-  assertEquals(0, x <<= ((x/x)>>>(((((x&x)-((x*(((tmp = -2689062497.0087833, tmp)^x)/((-1465906334.9701924)<<(tmp = -349000262, tmp))))*x))%(1630399442.5429945))*x)+((tmp = 605234630, tmp)%(tmp = 2325750892.5065155, tmp)))));
-  assertEquals(0, x |= (x%((x>>(((((tmp = 1622100459, tmp)<<x)&((((((tmp = 2411490075, tmp)<<x)|x)>>((x<<x)-(-2133780459)))/x)&(x+x)))%(x/((((tmp = 580125125.5035453, tmp)>>>(-470336002.1246581))|((tmp = 871348531, tmp)*x))>>(2866448831.23781))))-((2352334552)-(-562797641.6467373))))-(x^(tmp = -681731388, tmp)))));
-  assertEquals(0, x <<= (tmp = -1358347010.3729038, tmp));
-  assertEquals(-260967814, x |= ((tmp = -260967814.45976686, tmp)%(tmp = 1126020255.1772437, tmp)));
-  assertEquals(NaN, x %= ((((tmp = 3176388281, tmp)<<(tmp = 611228283.2600244, tmp))>>>((tmp = 3068009824, tmp)+(tmp = 2482705111, tmp)))>>>((tmp = -750778285.2580311, tmp)>>>x)));
-  assertEquals(0, x <<= (x>>>x));
-  assertEquals(0, x /= (1238919162));
-  assertEquals(0, x >>= (x^x));
-  assertEquals(0, x &= (-2137844801));
-  assertEquals(0, x >>>= (x^(x*(-1774217252))));
-  assertEquals(0, x >>= x);
-  assertEquals(0, x |= x);
-  assertEquals(0, x &= (x<<(tmp = 2791377560, tmp)));
-  assertEquals(-1330674638.8117397, x += (tmp = -1330674638.8117397, tmp));
-  assertEquals(353, x >>>= (-212202857.4320326));
-  assertEquals(353, x ^= ((((x+(tmp = 1448262278, tmp))-(-3141272537))>>(tmp = 1116596587.7832575, tmp))>>>((x-(((tmp = 303953098, tmp)>>>((tmp = 691514425, tmp)/((176223098)*(((2876180016)%(-1805235275.892374))|x))))<<(((tmp = 528736141.838547, tmp)^(2556817082))*(2898381286.2846575))))|((-1445518239)&(tmp = 389789481.9604758, tmp)))));
-  assertEquals(0, x >>>= (-227376461.14343977));
-  assertEquals(0, x <<= (tmp = -2575967504, tmp));
-  assertEquals(0, x <<= (x^((-2668391896)>>((x+(tmp = 598697235.9205595, tmp))+((((-2105306785)|((-1174912319.794015)>>>(x-((148979923)%((((tmp = -2459140558.4436393, tmp)|(1265905916.494016))^(tmp = 1213922357.2230597, tmp))|(1028030636))))))%x)+(((tmp = 1393280827.0135512, tmp)^((tmp = 1210906638, tmp)+(-1572777641.1396031)))<<x))))));
-  assertEquals(0, x *= (tmp = 2134187165, tmp));
-  assertEquals(-1084549964, x -= (tmp = 1084549964, tmp));
-  assertEquals(-2045706240, x &= ((tmp = -1250758905.7889671, tmp)*(x+(((x<<(x/(tmp = -738983664.845448, tmp)))>>>x)&(tmp = 2197525295, tmp)))));
-  assertEquals(-2045706240, x ^= (((522049712.14743733)>>(tmp = -2695628092, tmp))>>>(tmp = -2603972068, tmp)));
-  assertEquals(2249261056, x >>>= x);
-  assertEquals(-33291, x |= ((((1891467762)<<(184547486.213719))-((458875403.50689447)^(((x&(x*x))|x)%(-3127945140))))|(-100765232)));
-  assertEquals(-33291, x %= (1460486884.1367688));
-  assertEquals(-1, x >>= (tmp = -2667341441, tmp));
-  assertEquals(-3.6289151568259606e-10, x /= (tmp = 2755644474.4072013, tmp));
-  assertEquals(-3.6289151568259606e-10, x %= (tmp = 1186700893.0751028, tmp));
-  assertEquals(0, x <<= (tmp = -1199872107.9612694, tmp));
-  assertEquals(371216449, x ^= ((tmp = 371324611.1357789, tmp)&(x-(x|((tmp = -518410357, tmp)>>((tmp = 687379733, tmp)/x))))));
-  assertEquals(0.3561383159088311, x /= (((((x%(((((-2293101242)%((((495316779)/x)-((-3198854939.8857965)>>>((tmp = -288916023, tmp)-(x^(tmp = -2504080119.431858, tmp)))))^(-1201674989)))-((2965433901)*(405932927)))/((1974547923)|(tmp = 534069372, tmp)))-(x-((x+(-1258297330))%x))))<<(((-2648166176.4947824)^(-3043930615))&(1550481610)))<<(tmp = -3118264986.743822, tmp))<<x)|x));
-  assertEquals(-46272499.15029934, x -= (tmp = 46272499.50643766, tmp));
-  assertEquals(-6, x >>= ((tmp = -731454087.0621192, tmp)>>>x));
-  assertEquals(-2.7207928474520667e-9, x /= (((x<<(x|((tmp = -1650731700.9540024, tmp)/(tmp = -677823292, tmp))))^((((((1972576122.928667)>>x)%(2952412902.115453))<<((-2888879343)+(tmp = -425663504, tmp)))>>>(((((tmp = 1089969932, tmp)>>>(x|((-2088509661)/(1131470551))))>>>x)+x)|(tmp = 955695979.7982506, tmp)))|(((((tmp = 826954002.6188571, tmp)^(2016485728))|((x/(((x<<(tmp = 2493217141, tmp))/(-2259979800.997408))-(tmp = -427592173.41389966, tmp)))%(((-471172918)/x)>>>((383234436.16425097)&(tmp = 1664411146.5308032, tmp)))))*(tmp = 1863669754.7545495, tmp))*(x>>(2062197604)))))>>>((x-(2624545856))*(tmp = 1025803102, tmp))));
-  assertEquals(0, x >>= ((tmp = 1068702028, tmp)*(296106770)));
-  assertEquals(0, x ^= (x/x));
-  assertEquals(85359536, x ^= (((x|(((tmp = 740629227, tmp)<<(-1107397366))%((tmp = 2315368172, tmp)>>(((-2269513683)|(-2698795048))+(-396757976)))))*(929482738.803125))^(((-1415213955.4198723)-(tmp = -2885808324, tmp))>>>((tmp = -472842353.85736656, tmp)&(tmp = 1684231312.4497018, tmp)))));
-  assertEquals(2075131904, x <<= x);
-  assertEquals(123, x >>>= (x>>>(tmp = 754093009, tmp)));
-  assertEquals(0, x >>= ((-2690948145)/((1988638799)+x)));
-  assertEquals(0, x >>>= (tmp = -798849903.2467625, tmp));
-  assertEquals(NaN, x %= x);
-  assertEquals(NaN, x *= (2431863540.4609756));
-  assertEquals(484934656, x |= ((-2322193663)*(tmp = -2754666771, tmp)));
-  assertEquals(-82505091404694530, x *= (tmp = -170136513, tmp));
-  assertEquals(-82505090515370620, x += ((-148762237)&(tmp = 889417717, tmp)));
-  assertEquals(-908221124, x %= (tmp = -2346393300, tmp));
-  assertEquals(-1242515799, x ^= (2083328917));
-  assertEquals(-1126056310271520600, x *= ((((tmp = -3065605442, tmp)<<(-3012703413))|x)^(-2081329316.4781387)));
-  assertEquals(-1126056309941068000, x += ((((tmp = 1886925157, tmp)&((tmp = -163003119.31722307, tmp)/((tmp = 2094816076, tmp)>>((tmp = -706947027, tmp)^x))))^((1819889650.5261197)<<(-1641091933)))>>x));
-  assertEquals(-1864360191, x |= (((x/x)|x)|x));
-  assertEquals(-1864360191, x &= x);
-  assertEquals(-3728720382, x += x);
-  assertEquals(1042663165, x ^= (535165183.4230335));
-  assertEquals(2644530017.8833704, x += (1601866852.8833704));
-  assertEquals(-574949401, x |= ((tmp = 943193254.5210983, tmp)^((x%(tmp = -2645213497, tmp))*(-1904818769))));
-  assertEquals(1763223578, x ^= ((x^(tmp = -2244359016, tmp))^(tmp = 320955522, tmp)));
-  assertEquals(-1.9640961474334235, x /= (tmp = -897727731.0502782, tmp));
-  assertEquals(1, x >>>= (x-(-3183031393.8967886)));
-  assertEquals(1, x &= (tmp = 1732572051.4196641, tmp));
-  assertEquals(1, x >>= (-1642797568));
-  assertEquals(-2339115203.3140306, x += (-2339115204.3140306));
-  assertEquals(1955852093, x ^= (((((-1469402389)/(-2648643333.1454573))>>>x)<<(x/x))>>x));
-  assertEquals(-965322519, x ^= (3001399252));
-  assertEquals(-2139727840, x &= (tmp = 2298411812.964484, tmp));
-  assertEquals(2103328, x &= (tmp = -2488723009, tmp));
-  assertEquals(1799011007, x |= (tmp = -2498057537.226923, tmp));
-  assertEquals(1799011007, x |= ((-308193085)>>>x));
-  assertEquals(1799011007, x |= x);
-  assertEquals(818879107, x ^= (1542823996.423564));
-  assertEquals(-2601416919234843600, x *= ((-2357923057.076759)-x));
-  assertEquals(-2601416920481796600, x -= (x|(tmp = -3048039765, tmp)));
-  assertEquals(-33690112, x <<= x);
-  assertEquals(1039491072, x &= (tmp = 1039491474.3389125, tmp));
-  assertEquals(126891, x >>= (-3079837011.6151257));
-  assertEquals(-163191923097543, x *= (((tmp = -2847221258.4048786, tmp)*(x-(tmp = 1527622853.5925639, tmp)))^x));
-  assertEquals(753616551, x ^= (-946895202));
-  assertEquals(-347691264, x <<= (tmp = -433184408.33790135, tmp));
-  assertEquals(0, x <<= (x|(tmp = -1911731462.6835637, tmp)));
-  assertEquals(-0, x *= (tmp = -2616154415.1662617, tmp));
-  assertEquals(0, x >>= x);
-  assertEquals(0, x -= x);
-  assertEquals(0, x *= (2272504250.501526));
-  assertEquals(0, x ^= x);
-  assertEquals(NaN, x %= x);
-  assertEquals(0, x >>>= (2475346113));
-  assertEquals(NaN, x /= (((x+(-2646140897))&(((tmp = 1039073714.142481, tmp)-x)*x))|(x*(((-1277822905.773948)>>(tmp = 2035512354.2400663, tmp))*(77938193.80013895)))));
-  assertEquals(0, x ^= (x<<(tmp = 2491934268, tmp)));
-  assertEquals(0, x &= (tmp = 569878335.4607931, tmp));
-  assertEquals(-88575883, x ^= ((453890820.8012209)-((1569189876)%((-1280613677.7083852)^(-1902514249.29567)))));
-  assertEquals(-88575883, x %= (tmp = 257947563.19206762, tmp));
-  assertEquals(-88575881.7863678, x -= ((tmp = 1257547359.029678, tmp)/(x^(tmp = 948265672.821815, tmp))));
-  assertEquals(-169, x >>= (tmp = -2530523309.6703596, tmp));
-  assertEquals(-1, x >>= x);
-  assertEquals(-1, x |= x);
-  assertEquals(131071, x >>>= (-673590289));
-  assertEquals(1117196836, x -= (-1117065765));
-  assertEquals(3092236000.7125187, x -= (-1975039164.7125185));
-  assertEquals(1, x /= x);
-  assertEquals(-1599945863, x ^= (tmp = 2695021432.453696, tmp));
-  assertEquals(940543782, x ^= (tmp = 2561494111, tmp));
-  assertEquals(891400321673221800, x *= (tmp = 947749949.2662871, tmp));
-  assertEquals(-1509927296, x >>= ((tmp = 1113290009, tmp)-x));
-  assertEquals(-23, x >>= (tmp = 3216989626.7370152, tmp));
-  assertEquals(-0, x %= x);
-  assertEquals(0, x <<= (431687857.15246475));
-  assertEquals(-0, x /= (tmp = -1924652745.081665, tmp));
-  assertEquals(0, x <<= (1312950547.2179976));
-  assertEquals(0, x %= ((tmp = 2110842937.8580878, tmp)|(x<<x)));
-  assertEquals(0, x >>>= ((((-386879000)-((tmp = -2334036143.9396124, tmp)/((tmp = 965101904.2841234, tmp)<<(((3029227182.8426695)<<((tmp = -464466927, tmp)>>((((((tmp = 849594477.4111787, tmp)^(x&((513950657.6663146)%(x>>>x))))-((2898589263)|x))+(tmp = 2842171258.621288, tmp))>>>(tmp = -3158746843, tmp))<<(tmp = -2891369879, tmp))))-(x-(x&(tmp = -1707413686.2706504, tmp)))))))-(-2860419051))*(-1708418923)));
-  assertEquals(-328055783, x += ((((2857010474.8010874)|((tmp = -1415997622.320347, tmp)-(-1706423374)))%(tmp = 824357977.1339042, tmp))^(x>>(x|x))));
-  assertEquals(-168539902503779140, x *= ((tmp = -1057687018, tmp)<<((1408752963)-(2030056734))));
-  assertEquals(-Infinity, x /= ((x-(2232683614.320658))*(((tmp = 195551174, tmp)*((((739595970)>>>(tmp = -2218890946.8788786, tmp))>>>(((tmp = -240716255.22407627, tmp)&(((((1598029916.3478878)|((tmp = -881749732, tmp)+(x>>x)))^(4443059))<<(((tmp = 2453020763, tmp)+((x>>>(tmp = -1904203813, tmp))&(-355424604.49235344)))<<(tmp = 2814696070, tmp)))%((tmp = -250266444, tmp)>>>(((((2710614972)&(((tmp = 910572052.6994087, tmp)^(tmp = -1028443184.3220406, tmp))/((-2718010521)^(tmp = 676361106, tmp))))|x)^(-1326539884))>>(-1573782639.7129154)))))/(tmp = 1923172768, tmp)))>>>(tmp = -2858780232.4886074, tmp)))/((((((-2060319376.353397)%x)>>(tmp = -3122570085.9065285, tmp))/(tmp = -1499018723.8064275, tmp))*((-655257391)<<x))>>x))));
-  assertEquals(NaN, x += ((3059633304)%((((tmp = 2538190083, tmp)*((tmp = -2386800763.356364, tmp)/x))&(1341370996))%(-2929765076.078223))));
-  assertEquals(NaN, x %= ((x&(347774821))>>>(462318570.2578629)));
-  assertEquals(NaN, x *= ((2829810152.071517)*(tmp = 768565684.6892327, tmp)));
-  assertEquals(NaN, x -= x);
-  assertEquals(0, x >>>= (x&(tmp = 1786182552, tmp)));
-  assertEquals(973967377, x ^= ((tmp = 2115869489.836838, tmp)&(994956497)));
-  assertEquals(985246427.4230617, x += (11279050.423061728));
-  assertEquals(985246427, x &= x);
-  assertEquals(0, x >>= ((tmp = 1090502660.1867907, tmp)>>((-1599370623.5747645)-(tmp = -1321550958, tmp))));
-  assertEquals(0, x %= (tmp = -2386531950.018572, tmp));
-  assertEquals(0, x >>>= x);
-  assertEquals(NaN, x /= x);
-  assertEquals(0, x >>>= (tmp = -1535987507.682257, tmp));
-  assertEquals(-0, x /= (-2570639987));
-  assertEquals(-542895632, x |= (tmp = -542895632, tmp));
-  assertEquals(-33930977, x >>= (tmp = -861198108.1147206, tmp));
-  assertEquals(-0, x %= x);
-  assertEquals(0, x ^= (x*(-608154714.1872904)));
-  assertEquals(-140011520, x |= ((tmp = 377418995, tmp)<<((1989575902)>>(tmp = -2558458031.066773, tmp))));
-  assertEquals(-140026048, x -= ((((tmp = 1465272774.7540011, tmp)<<((2164701398)<<(tmp = -818119264, tmp)))>>((tmp = -1490486001, tmp)>>(664410099.6412607)))>>(x>>>(((tmp = -2438272073.2205153, tmp)%(tmp = 2142162105.4572072, tmp))-(tmp = 2259040711.6543813, tmp)))));
-  assertEquals(39214588236996610, x *= (x<<(-401696127.06632423)));
-  assertEquals(1, x /= x);
-  assertEquals(0, x %= x);
-  assertEquals(0, x *= ((tmp = -1709874807.176726, tmp)&(-2786424611)));
-  assertEquals(-1320474063.3408537, x += (tmp = -1320474063.3408537, tmp));
-  assertEquals(88, x >>>= (tmp = -3179247911.7094674, tmp));
-  assertEquals(1606348131, x += ((tmp = 1555621121.5726175, tmp)|(-3026277110.9493155)));
-  assertEquals(200793516, x >>>= x);
-  assertEquals(-2952688672.1074514, x -= (tmp = 3153482188.1074514, tmp));
-  assertEquals(1342278624, x >>>= ((x>>>((tmp = 1264475713, tmp)-(-913041544)))>>>((tmp = 2008379930, tmp)%(tmp = 3105129336, tmp))));
-  assertEquals(0, x ^= x);
-  assertEquals(0, x /= (tmp = 788363717, tmp));
-  assertEquals(430466213, x -= (tmp = -430466213, tmp));
-  assertEquals(164757385222499550, x *= (tmp = 382741735, tmp));
-  assertEquals(164757385222499550, x %= (((tmp = 1974063648, tmp)%((806015603)>>>x))*((tmp = 2836795324, tmp)<<(tmp = -1785878767, tmp))));
-  assertEquals(-190957725.86956096, x /= (x^((-2939333300.066044)-(x|(-2085991826)))));
-  assertEquals(-190957725.86956096, x %= (tmp = -948386352, tmp));
-  assertEquals(0.6457336106922105, x /= (-295722141));
-  assertEquals(0, x |= ((415991250)&((x>>(tmp = -3188277823, tmp))<<(511898664.1008285))));
-  assertEquals(0, x &= ((793238922)|x));
-  assertEquals(-1576701979, x ^= (2718265317));
-  assertEquals(-49271937, x >>= x);
-  assertEquals(-49271937, x |= x);
-  assertEquals(-49271937, x &= x);
-  assertEquals(775316382, x -= (-824588319));
-  assertEquals(912498176, x <<= (tmp = -2223542776.836312, tmp));
-  assertEquals(0, x -= (x&((tmp = 1999412385.1074471, tmp)/(-1628205254))));
-  assertEquals(0, x -= x);
-  assertEquals(0, x >>= (-768730139.7749677));
-  assertEquals(-1861304245, x |= (((5128483)^(((tmp = -1768372004, tmp)/(x^(tmp = 1310002444.757094, tmp)))*((tmp = 188242683.09898067, tmp)^(tmp = -2263757432, tmp))))^((tmp = 2223246327, tmp)*((tmp = -2360528979, tmp)-((tmp = 2442334308, tmp)>>(458302081))))));
-  assertEquals(1, x /= x);
-  assertEquals(2, x += x);
-  assertEquals(1, x /= x);
-  assertEquals(0, x ^= x);
-  assertEquals(-0, x *= (-1852374359.3930533));
-  assertEquals(0, x <<= (tmp = 1223645195.148961, tmp));
-  assertEquals(1789655087, x |= ((-2505312209.770559)>>x));
-  assertEquals(-65568768, x <<= x);
-  assertEquals(4229398528, x >>>= x);
-  assertEquals(-8408187, x |= (-3029781627));
-  assertEquals(-8408187, x |= (((2322165037)-((tmp = -1424506897.362995, tmp)%x))&x));
-  assertEquals(-7884926, x += (x>>>(x|(2738095820))));
-  assertEquals(-7884926, x %= (576507013));
-  assertEquals(751801768, x ^= (tmp = -750241238, tmp));
-  assertEquals(-1986010067668600800, x *= (tmp = -2641667195, tmp));
-  assertEquals(1921196240, x ^= (x%(-1954178308)));
-  assertEquals(847388880, x ^= ((tmp = 1632856124, tmp)&((tmp = -1536309755, tmp)<<(tmp = -3158362800, tmp))));
-  assertEquals(-469662000.6651099, x += (tmp = -1317050880.6651099, tmp));
-  assertEquals(-812358332, x ^= ((-2832480471)>>>(2016495937)));
-  assertEquals(21, x ^= (((tmp = 1815603134.2513008, tmp)/((tmp = 147415927, tmp)%(-1059701742)))+x));
-  assertEquals(-2844409139.792712, x += (tmp = -2844409160.792712, tmp));
-  assertEquals(177070, x >>>= x);
-  assertEquals(0, x %= x);
-  assertEquals(0, x >>= x);
-  assertEquals(1459126376, x ^= (tmp = -2835840920, tmp));
-  assertEquals(1459126376, x %= (-1462864282));
-  assertEquals(0, x >>>= (tmp = 2922724319, tmp));
-  assertEquals(338995506, x ^= (338995506.6411549));
-  assertEquals(336896258, x &= (2635904967));
-  assertEquals(336634112, x -= (x&(tmp = 1659656287, tmp)));
-  assertEquals(NaN, x %= (x-x));
-  assertEquals(NaN, x /= (tmp = -674606200, tmp));
-  assertEquals(NaN, x %= ((x|(2788108542))/(x+(tmp = 600941473, tmp))));
-  assertEquals(0, x >>>= ((-1858251597.3970242)>>>x));
-  assertEquals(1951294747, x |= (tmp = 1951294747, tmp));
-  assertEquals(1951294747, x &= x);
-  assertEquals(-153190625, x |= (-1500095737));
-  assertEquals(23467367587890624, x *= x);
-  assertEquals(346531290.1813514, x /= (((((-513617734.11148167)|x)/((tmp = -2042982150.1170752, tmp)%((x%((x%x)>>>(((-1369980151)&(((922678983)%(x&(tmp = -855337708, tmp)))-((tmp = -2717183760, tmp)>>>((1939904985.4701347)%(((tmp = -2473316858, tmp)&((tmp = -599556221.9046664, tmp)>>((tmp = -6352213, tmp)/x)))&x)))))%x)))/((tmp = -1842773812.8648412, tmp)>>>(((x>>>(tmp = 499774063, tmp))<<(((tmp = -1353532660.5755146, tmp)*(-3070956509))>>(((-905883994.0188017)>>(tmp = -16637173, tmp))<<((tmp = 471668537, tmp)*((tmp = -232036004.26637793, tmp)/x)))))&(tmp = 85227224, tmp))))))>>>(x|(-2528471983)))-((tmp = 1531574803, tmp)+((x>>>x)-(2889291290.158888)))));
-  assertEquals(-94.42225749399837, x /= (((tmp = 2381634642.1432824, tmp)>>(tmp = -2637618935, tmp))|(2307200473)));
-  assertEquals(-47, x >>= (1524333345.141235));
-  assertEquals(-2.8699253616435082e-8, x /= (1637673252));
-  assertEquals(0, x |= x);
-  assertEquals(1083427040, x += ((-2012055268)<<(tmp = -2192382589.6911573, tmp)));
-  assertEquals(1083427040, x %= (x*x));
-  assertEquals(2694039776, x += ((((-1740065704.9004602)<<(-736392934))%(2781638048.424092))>>>(x&x)));
-  assertEquals(-1600927520, x |= ((tmp = 2904430054.869525, tmp)*(((1054051883.4751332)*x)*((-939020743)-(tmp = 1636935481.1834455, tmp)))));
-  assertEquals(-1600927520, x -= (x%x));
-  assertEquals(3037584978216498700, x *= (tmp = -1897390694, tmp));
-  assertEquals(372598954.1823988, x %= (tmp = 1553763703.5082102, tmp));
-  assertEquals(-1476395008, x <<= ((x>>((tmp = 282496335.49494267, tmp)^((-1948623419.6947453)|((((((tmp = -1203306995, tmp)-(-5554612.355098486))>>>(1867254951.4836824))>>x)|(-695777865))/((-59122652.19377303)<<(-609999229.7448442))))))>>(x/(tmp = -1207010654.9993455, tmp))));
-  assertEquals(-2.2540185787941605, x /= (((tmp = 1364159859.9199843, tmp)*x)>>x));
-  assertEquals(-2, x |= x);
-  assertEquals(2241824008, x *= ((3174055292.962967)>>(((-2379151623.602476)>>(tmp = -1423760236, tmp))>>(tmp = -522536019.2225733, tmp))));
-  assertEquals(-2138158385, x ^= ((x>>((((1316131966.9180691)-((x*x)>>x))>>>x)>>((-2712430284)|(((((x<<(-616185937.6090865))-(((x-(tmp = 2957048661, tmp))<<(tmp = 617564839.888214, tmp))/(x%((tmp = -447175647.9393475, tmp)<<(2203298493.460617)))))-((x&((x<<(914944265))^(((-1294901094)*((tmp = 2512344795, tmp)+((((tmp = -1227572518, tmp)%(1831277766.4920158))*((x|x)^(tmp = 2515415182.6718826, tmp)))*x)))-(961485129))))>>>(tmp = 2079018304, tmp)))>>(tmp = 734028202, tmp))^(554858721.6149715)))))-((tmp = 1312985279.5114603, tmp)^(tmp = 2450817476.179955, tmp))));
-  assertEquals(2.759030298237921, x /= (x|(tmp = -775901745.3688724, tmp)));
-  assertEquals(8, x <<= x);
-  assertEquals(NaN, x %= (((x&((1792031228.831834)>>(-1174912501)))%(((-2351757750)+(tmp = -2610099430, tmp))*(-2811655968)))*(x&(tmp = -1881632878, tmp))));
-  assertEquals(0, x &= ((x*(616116645.7508612))^(2789436828.536846)));
-  assertEquals(0, x *= x);
-  assertEquals(35097452, x ^= ((tmp = 1023684579, tmp)%(((x|((tmp = -757953041, tmp)+(772988909)))+(tmp = -2934577578, tmp))>>>((tmp = -1973224283, tmp)>>>((x*(2244818063.270375))|(x-(-716709285)))))));
-  assertEquals(0.015207441433418992, x /= (2307913014.4056892));
-  assertEquals(-5865042.942076175, x -= (5865042.957283616));
-  assertEquals(-67719.94207617454, x %= (((1464126615.2493973)+(398302030.0108756))>>>x));
-  assertEquals(4294899577, x >>>= (x<<x));
-  assertEquals(-1, x >>= (tmp = 607447902, tmp));
-  assertEquals(-1, x >>= (3081219749.9119744));
-  assertEquals(6.53694303504065e-10, x /= (tmp = -1529767040.4034374, tmp));
-  assertEquals(6.53694303504065e-10, x %= ((tmp = 899070650.7190754, tmp)&(tmp = -1101166301, tmp)));
-  assertEquals(6.53694303504065e-10, x %= (tmp = -2207346460, tmp));
-  assertEquals(NaN, x %= (((x&x)>>x)%(((-10980184)+x)&(tmp = -1473044870.4729445, tmp))));
-  assertEquals(NaN, x -= x);
-  assertEquals(-1755985426, x ^= (tmp = 2538981870, tmp));
-  assertEquals(-13842, x %= ((((-2258237411.3816605)+(-1325704332.0531585))<<((tmp = -877665450.1877053, tmp)>>(((((2420989037)+(2084279990.6278818))*(-327869571.9348242))+x)^x)))>>>x));
-  assertEquals(1, x /= x);
-  assertEquals(1, x >>= ((2241312290)^(2859250114)));
-  assertEquals(0, x >>= x);
-  assertEquals(-1615631756, x |= (-1615631756.1469975));
-  assertEquals(-1615631756, x |= x);
-  assertEquals(-627245056, x <<= ((x*(tmp = -1308330685.5971081, tmp))|(tmp = 1479586158, tmp)));
-  assertEquals(-627245056, x |= x);
-  assertEquals(1786953888, x ^= (-1340096352.1839824));
-  assertEquals(1668014353, x -= (tmp = 118939535, tmp));
-  assertEquals(1, x /= x);
-  assertEquals(-645681, x ^= ((-1322356629)>>(tmp = 1829870283, tmp)));
-  assertEquals(-1322354688, x <<= (-794779253));
-  assertEquals(-4310084378.672725, x += (-2987729690.6727247));
-  assertEquals(-8620168757.34545, x += x);
-  assertEquals(-8720421, x |= (tmp = -748107877.6417065, tmp));
-  assertEquals(-1508858270, x ^= (1500137913));
-  assertEquals(-0.825735756765112, x /= (1827289490.1767085));
-  assertEquals(1253449509.1742642, x += (((tmp = 1253449509.9576545, tmp)-(((tmp = 2860243975, tmp)+(367947569.85976696))>>(((((530960315)>>>((((x%(tmp = -2203199228, tmp))<<(x*(((tmp = -117302283, tmp)/(x-((2579576936)%(-1225024012))))&(tmp = -2857767500.1967726, tmp))))/((x/((tmp = -166066119, tmp)<<x))|x))>>>x))|(((2771852372)>>(((tmp = -3103692094.1463976, tmp)-(tmp = 2867208546.069278, tmp))>>>(702718610.1963737)))|(tmp = 2680447361, tmp)))>>x)>>(-2006613979.051014))))^((-1665626277.9339101)/(x<<(tmp = 342268763, tmp)))));
-  assertEquals(1693336701.1742642, x += (tmp = 439887192, tmp));
-  assertEquals(0.8479581831275719, x /= ((1171383583)+(((x&x)>>>(51482548.618915915))-(tmp = -825572595.1031849, tmp))));
-  assertEquals(28, x |= ((tmp = -2355932919.6737213, tmp)>>(tmp = -2395605638, tmp)));
-  assertEquals(0, x %= x);
-  assertEquals(0, x -= x);
-  assertEquals(0, x <<= (x^((tmp = 2793423893.484949, tmp)*(1585074754.3250475))));
-  assertEquals(0, x >>= (x/(x-((957719861.9175875)&(1288527195)))));
-  assertEquals(0, x >>>= ((-1429196921.4432657)/x));
-  assertEquals(-852424225.734199, x -= (tmp = 852424225.734199, tmp));
-  assertEquals(-46674433, x |= ((tmp = -2335242963, tmp)*((2135206646.2614377)>>(tmp = 505649511.8292929, tmp))));
-  assertEquals(2944662357, x += (tmp = 2991336790, tmp));
-  assertEquals(1404, x >>>= (849155189.1503456));
-  assertEquals(-846755170, x ^= (tmp = -846753822.4471285, tmp));
-  assertEquals(52615, x >>>= ((-517068110)+x));
-  assertEquals(1475021859.9916897, x += (tmp = 1474969244.9916897, tmp));
-  assertEquals(0, x %= x);
-  assertEquals(0, x %= ((539583595.8244679)*(tmp = 1469751690.9193692, tmp)));
-  assertEquals(0, x &= (807524227.2057163));
-  assertEquals(NaN, x %= x);
-  assertEquals(NaN, x -= (x^((tmp = -362481588, tmp)%(2611296227))));
-  assertEquals(NaN, x *= x);
-  assertEquals(0, x >>= ((-2519875630.999908)<<x));
-  assertEquals(NaN, x %= x);
-  assertEquals(NaN, x += (((tmp = 2485209575, tmp)>>(tmp = 2326979823, tmp))%(x-(((-1296334640.7476478)&x)<<x))));
-  assertEquals(0, x >>= (((tmp = 1370704131, tmp)^((((tmp = 793217372.7587746, tmp)>>(((-1455696484.109328)|(((((-2186284424.5379324)<<(tmp = 3052914152.254852, tmp))-(x>>(tmp = 3121403408, tmp)))+((778194280)-(((((tmp = 2398957652, tmp)-(x+(((-2592019996.937958)>>((tmp = 1648537981, tmp)>>x))<<(-677436594))))<<(39366669.09012544))|((tmp = 3133808408.9582872, tmp)-(-2987527245.010673)))*x)))|((tmp = -2178662629, tmp)<<x)))^(((tmp = 909652440.3570575, tmp)%(-2572839902.6852217))%(-1879408081))))*(tmp = -2910988598, tmp))&(((x^x)>>(2822040993))|((x*x)^(((1072489842.6785052)|(x-(((464054192.7390214)^x)<<(tmp = -2754448095, tmp))))*((tmp = -1544182396, tmp)/(tmp = -3198554481, tmp)))))))^(tmp = 1946162396.9841106, tmp)));
-  assertEquals(371272192, x |= (((x^((x-(x/x))&(tmp = 2370429394, tmp)))-(tmp = -403692829, tmp))*(tmp = 2808636109, tmp)));
-  assertEquals(929786482, x |= ((729966239.8987448)^(x-((tmp = 120127779, tmp)^((tmp = -3088531385, tmp)>>>((x+((tmp = 2364833601, tmp)>>>(((599149090.6666714)>>(tmp = 2838821032, tmp))%(tmp = -662846011, tmp))))-(tmp = 1168491221.1813436, tmp)))))));
-  assertEquals(-681121542, x += ((-1610909505.998718)^((tmp = -957338882, tmp)>>>(tmp = 1935594133.6531684, tmp))));
-  assertEquals(-2147483648, x <<= ((tmp = 15161708, tmp)|(2453975670)));
-  assertEquals(-2147483648, x >>= x);
-  assertEquals(0, x <<= (2080486058));
-  assertEquals(0, x &= (((x&(tmp = -767821326, tmp))/((tmp = 1877040536, tmp)>>>(tmp = 2378603217.75597, tmp)))*(-1601799835)));
-  assertEquals(0, x %= (-1820240383));
-  assertEquals(1621233920, x ^= ((tmp = 820230232, tmp)*(1727283900)));
-  assertEquals(1621233920, x |= (x>>>x));
-  assertEquals(1621233931, x += ((tmp = 794966194.9011587, tmp)>>(tmp = -597737830.5450518, tmp)));
-  assertEquals(1621276543, x |= (((x^((2354444886)+(tmp = 685142845.4708651, tmp)))-(tmp = 790204976.9120214, tmp))>>>((((tmp = -2792921939, tmp)/(((((tmp = -80705524, tmp)<<x)-(((((((tmp = 1951577216.379527, tmp)>>>x)%((-529882150)>>>(tmp = -1682409624, tmp)))<<((-42043756.29025769)-(-1803729173.6855814)))/(2937202170.118023))*(tmp = -1998098798.5722106, tmp))*(tmp = -2996229463.904228, tmp)))&x)>>>(-301330643)))/(-2858859382.0050273))-(tmp = 1571854256.0740635, tmp))));
-  assertEquals(810638271, x >>>= (x/(1553632833)));
-  assertEquals(810638271, x <<= (tmp = -1467397440, tmp));
-  assertEquals(-2147483648, x <<= x);
-  assertEquals(871068871, x ^= (tmp = 3018552519, tmp));
-  assertEquals(-1073743881, x |= ((tmp = 2294122324.020989, tmp)|(tmp = -1799706842.4493146, tmp)));
-  assertEquals(-77816868, x += (((-2225296403)&x)>>(tmp = -2667103424.445239, tmp)));
-  assertEquals(-1215889, x >>= (tmp = 1876107590.8391647, tmp));
-  assertEquals(-2431778, x += x);
-  assertEquals(4292535518, x >>>= (((x>>(-1825580683))/x)%x));
-  assertEquals(4292802560, x -= (x|(1492864090)));
-  assertEquals(0, x -= x);
-  assertEquals(0, x >>= x);
-  assertEquals(0, x %= (tmp = 2173121205, tmp));
-  assertEquals(0, x *= (x>>x));
-  assertEquals(1565261471, x |= ((1565261471.323931)>>>x));
-  assertEquals(0, x -= x);
-  assertEquals(-86980804, x |= (-86980804));
-  assertEquals(-698956484, x -= (((((2754713793.1746016)*(((((-1514587465.0698888)>>(tmp = -1307050817, tmp))/(tmp = 2368054667.438519, tmp))*(-1908125943.5714772))<<(x>>>(-357164827.4932244))))+(1257487617))<<(2954979945))&(612330472)));
-  assertEquals(-1073741824, x <<= x);
-  assertEquals(54497747, x ^= (-1019244077.098908));
-  assertEquals(54501375, x |= (((tmp = 1944912427, tmp)>>>x)%x));
-  assertEquals(0, x -= x);
-  assertEquals(0, x -= x);
-  assertEquals(-0, x *= (-1748215388));
-  assertEquals(0, x >>= x);
-  assertEquals(0, x >>>= (((tmp = 988769112, tmp)%(tmp = -3133658477, tmp))<<x));
-  assertEquals(0, x %= (1685221089.2950323));
-  assertEquals(0, x >>>= (x+((793467168)-(tmp = 135877882, tmp))));
-  assertEquals(0, x %= ((tmp = -2406801984, tmp)%(tmp = -987618172, tmp)));
-  assertEquals(0, x *= ((-2943444887.953456)|(tmp = -2327469738.4544783, tmp)));
-  assertEquals(0, x >>= x);
-  assertEquals(-145484729.70167828, x += (tmp = -145484729.70167828, tmp));
-  assertEquals(1140855872, x &= (x^(tmp = 3151437967.965556, tmp)));
-  assertEquals(1486808408, x += (tmp = 345952536, tmp));
-  assertEquals(107846582.36594129, x %= (-1378961825.6340587));
-  assertEquals(-642031616, x <<= (x+x));
-  assertEquals(151747770.95108718, x *= (x/(tmp = 2716379907, tmp)));
-  assertEquals(192723456, x <<= (tmp = -1731167384, tmp));
-  assertEquals(2151208003, x -= ((-2151208003)+x));
-  assertEquals(1, x /= x);
-  assertEquals(1, x |= x);
-  assertEquals(1996766603, x |= (1996766602));
-  assertEquals(895606123, x ^= (tmp = 1113972960.966081, tmp));
-  assertEquals(-1500036886, x ^= (tmp = 2482412929, tmp));
-  assertEquals(-1542644247, x ^= (x>>>((tmp = 51449105, tmp)>>>(((-2057313176)*x)/(-1768119916)))));
-  assertEquals(-1496074063273093600, x *= ((tmp = 786152274, tmp)^(387292498)));
-  assertEquals(-794329073, x %= (((tmp = -2314637675.617696, tmp)*((((x*(411053423.29070306))-(2889448433.4240828))/((-970630131)/(tmp = -2886607600.7423067, tmp)))<<(tmp = 1263617112.9362245, tmp)))|(2816980223.8209996)));
-  assertEquals(2468008436047106600, x *= (tmp = -3107035257.725115, tmp));
-  assertEquals(3040956928, x >>>= ((tmp = 1514372119.1787262, tmp)*(3169809008)));
-  assertEquals(-19, x >>= (tmp = -266966022.10604453, tmp));
-  assertEquals(-1.6505580654964654e-8, x /= ((-3143841480)>>(x-x)));
-  assertEquals(-2.2420284729165577e-7, x *= (x*((((703414102.2523813)%(tmp = 2989948152, tmp))-((-1583401827.2949386)^((tmp = -1916731338, tmp)%((331500653.3566053)|(((tmp = 29865940, tmp)+((tmp = -2294889418.6764183, tmp)<<(tmp = -1558629267.255229, tmp)))>>>(x*(x+x)))))))|((988977957)&(-2986790281)))));
-  assertEquals(0, x ^= (x/(tmp = 781117823.345541, tmp)));
-  assertEquals(NaN, x *= (((x^((((tmp = -2969290335, tmp)+(((((tmp = -175387021, tmp)&(tmp = -1080807973, tmp))<<(tmp = -2395571076.6876855, tmp))|((tmp = -1775289899.4106793, tmp)^x))|(-2963463918)))*(tmp = -1761443911, tmp))^(tmp = 847135725, tmp)))<<((146689636)<<x))%x));
-  assertEquals(0, x ^= x);
-  assertEquals(1720182184, x -= (((tmp = 3184020508, tmp)|((-489485703)+(tmp = -2644503573, tmp)))&(tmp = 2575055579.6375213, tmp)));
-  assertEquals(1720182184, x >>= (x<<(-45408034)));
-  assertEquals(5.759243187540471e+27, x *= (((x&(1456298805))+(x<<(106573181)))*((566861317.2877743)+(2262937360.3733215))));
-  assertEquals(5.759243187540471e+27, x -= (tmp = -1365873935, tmp));
-  assertEquals(0, x <<= x);
-  assertEquals(0, x >>= (1960073319.3465362));
-  assertEquals(0, x <<= x);
-  assertEquals(560463904, x += ((tmp = 1844076589.9286406, tmp)&((((((-691675777.5800121)|(-745631201))|x)+(tmp = 1504458593.2843904, tmp))-x)<<x)));
-  assertEquals(-513210271, x -= (x|(1052702623.7761713)));
-  assertEquals(3781757025, x >>>= ((-1346666404.362477)*(tmp = 2798191459, tmp)));
-  assertEquals(1080100929, x &= (1122097879.882534));
-  assertEquals(1276833905.8093092, x *= ((1276833905.8093092)/x));
-  assertEquals(1276833905.8093092, x %= (1796226525.7152414));
-  assertEquals(1276833905, x <<= (((tmp = -491205007.83412814, tmp)*(tmp = 1496201476.496839, tmp))>>(x+((tmp = -854043282.114594, tmp)-((x|(tmp = -807842056, tmp))*x)))));
-  assertEquals(1276833905, x %= (((-1870099318)>>>(((tmp = -2689717222, tmp)/(248095232))/(tmp = 1036728800.5566598, tmp)))&(((((857866837)>>(tmp = 3034825801.740485, tmp))|(-1676371984))>>>(x<<x))%((-3035366571.0221004)*(1578324367.8819473)))));
-  assertEquals(1, x /= x);
-  assertEquals(2819223656.189109, x += (2819223655.189109));
-  assertEquals(-1475743640, x >>= (((tmp = 2586723314.38089, tmp)/(x&(tmp = -697978283.9961061, tmp)))<<(x%((-1167534676)>>(x^((tmp = -284763535, tmp)*((x%x)&((((tmp = 2916973220.726839, tmp)%x)/(tmp = -1338421209.0621986, tmp))|((tmp = -834710536.803335, tmp)%x)))))))));
-  assertEquals(-3267683406, x -= (tmp = 1791939766, tmp));
-  assertEquals(-2090420900700614100, x *= (639725653));
-  assertEquals(-1540353536, x %= ((-1800269105)<<((((x&(((tmp = 1135087416.3945065, tmp)^(613708290))>>x))>>(tmp = -1234604858.7683473, tmp))^(2404822882.7666225))>>>((tmp = -287205516, tmp)-((1648853730.1462333)^((x+(x%((tmp = 359176339, tmp)%((2856479172)<<(tmp = -1995209313, tmp)))))^(((tmp = 2857919171.839304, tmp)>>>(tmp = 2779498870, tmp))>>x)))))));
-  assertEquals(-2093767030, x ^= (654554250.498078));
-  assertEquals(1, x >>>= ((tmp = -166296226.12181997, tmp)^(x/x)));
-  assertEquals(-1487427474, x -= ((x<<x)|(1487427475.4063978)));
-  assertEquals(-1487427470.562726, x += ((-1226399959.8267038)/((tmp = 2172365551, tmp)<<x)));
-  assertEquals(-3457859227618939400, x *= (tmp = 2324724597.3686075, tmp));
-  assertEquals(396221312, x >>= (-1354035390));
-  assertEquals(0, x %= x);
-  assertEquals(0, x &= (tmp = 2733387603, tmp));
-  assertEquals(1485905453, x |= ((((tmp = -1321532329.304437, tmp)&((((tmp = 1817382709.4180388, tmp)%(((tmp = 2089156555.7749293, tmp)-(-1555460267))|(tmp = 717392475.9986715, tmp)))%(tmp = 1976713214, tmp))^x))>>>x)+(tmp = -2812404197.002721, tmp)));
-  assertEquals(1485905453, x |= x);
-  assertEquals(-997658264, x <<= (-1409757949.6038744));
-  assertEquals(-997657290, x -= ((-2041106361)>>(tmp = -2014750507, tmp)));
-  assertEquals(-2138512124, x &= (tmp = 2565597060, tmp));
-  assertEquals(8422400, x &= ((-2819342693.5172367)*(tmp = 1441722560, tmp)));
-  assertEquals(111816531.81703067, x -= (-103394131.81703067));
-  assertEquals(59606682.673836395, x *= ((tmp = -1451690098, tmp)/(x-(2835050651.717734))));
-  assertEquals(-119213365.34767279, x *= (x|((-2656365050)/((-66180492)+(tmp = 284225706.32323086, tmp)))));
-  assertEquals(-232839, x >>= (1694344809.435083));
-  assertEquals(-1, x >>= x);
-  assertEquals(1, x *= x);
-  assertEquals(1, x |= x);
-  assertEquals(0, x >>= (tmp = 397239268, tmp));
-  assertEquals(-1525784563, x -= (tmp = 1525784563, tmp));
-  assertEquals(-153.62740888512675, x /= (((tmp = -2040622579.5354173, tmp)*(tmp = -1149025861.549324, tmp))%(((tmp = 2981701364.0073133, tmp)*(tmp = 2993366361, tmp))|(x|(tmp = 1800299979, tmp)))));
-  assertEquals(-1671795135, x &= (-1671795135.6173766));
-  assertEquals(-4253, x |= ((((x*((1533721762.8796673)<<((tmp = 1026164775.0081646, tmp)<<x)))<<(((x-((((x>>((((((tmp = -481536070.7067797, tmp)&(tmp = 1663121016, tmp))>>>(-2974733313.5449667))+(tmp = -493019653, tmp))>>x)&(tmp = 879307404.8600142, tmp)))>>>x)%(x-(tmp = -1806412445.788453, tmp)))%x))<<(x<<(x+x)))+x))>>((tmp = -332473688.28477216, tmp)<<((tmp = 1701065928, tmp)+(((((tmp = -2407330783, tmp)+x)-((tmp = 584100783, tmp)%(tmp = -3077106506, tmp)))^x)>>x))))<<x));
-  assertEquals(-0, x %= x);
-  assertEquals(0, x >>>= x);
-  assertEquals(0, x >>>= (1578470476.6074834));
-  assertEquals(0, x >>>= (974609751));
-  assertEquals(-120, x += (x-((tmp = -245718438.0842378, tmp)>>>(tmp = -1870354951, tmp))));
-  assertEquals(-6.134465505515781e-8, x /= (1956160645));
-  assertEquals(-0, x %= x);
-  assertEquals(0, x *= (tmp = -399718472.70049024, tmp));
-  assertEquals(-1803198769.8413258, x += (-1803198769.8413258));
-  assertEquals(988624943, x ^= ((((tmp = 320776739.5608537, tmp)*(((tmp = -983452570.3150327, tmp)^x)&(tmp = -3181597938, tmp)))-(tmp = -1367913740.9036021, tmp))/(((tmp = -535854933.2943456, tmp)-(717666905.8122432))>>>(((((x^(tmp = 380453258.60062766, tmp))^(tmp = -1242333929, tmp))/((tmp = 1072416261, tmp)+(((2090466933)*(x*(tmp = -386283072, tmp)))|((tmp = 789259942, tmp)<<(tmp = -1475723636.1901488, tmp)))))>>>x)%((x>>(tmp = -1243048658.3818703, tmp))|((((((tmp = -619553509, tmp)|x)/(878117279.285609))|((x<<(x>>>(tmp = -749568437.7390883, tmp)))*x))/(tmp = 1674804407, tmp))-(x*(tmp = 1528620873, tmp))))))));
-  assertEquals(988625135, x |= (x>>>(tmp = 2402222006, tmp)));
-  assertEquals(988625135, x %= (-2691094165.990094));
-  assertEquals(0, x %= x);
-  assertEquals(-0, x *= (tmp = -1409904262, tmp));
-  assertEquals(-0, x /= ((1176483512.8626208)<<x));
-  assertEquals(0, x &= ((((1677892713.6240005)^(tmp = 2575724881, tmp))^(tmp = -2935655281.208194, tmp))*(216675668)));
-  assertEquals(0, x >>= (tmp = -1296960457, tmp));
-  assertEquals(0, x |= x);
-  assertEquals(NaN, x /= x);
-  assertEquals(0, x <<= (x>>(-3127984289.9112387)));
-  assertEquals(0, x %= ((tmp = 190018725.45957255, tmp)<<((x>>>x)/x)));
-  assertEquals(0, x /= (1185681972));
-  assertEquals(0, x &= ((tmp = -1285574617, tmp)>>x));
-  assertEquals(0, x >>>= ((tmp = 2498246277.2054763, tmp)+(((tmp = 924534435, tmp)&x)>>(tmp = 1379755429, tmp))));
-  assertEquals(0, x -= x);
-  assertEquals(0, x /= (3093439341));
-  assertEquals(0, x *= (x>>>x));
-  assertEquals(0, x &= (tmp = 551328367, tmp));
-  assertEquals(-0, x /= (-3153411714.834353));
-  assertEquals(1217585288, x ^= (tmp = -3077382008.637764, tmp));
-  assertEquals(-639702017, x |= ((tmp = -640922633, tmp)%(tmp = -879654762, tmp)));
-  assertEquals(-1645297680, x <<= (tmp = 1418982820.8182912, tmp));
-  assertEquals(-1.4059558868398736, x /= (1170234212.4674253));
-  assertEquals(-2650856935.66554, x *= (1885448157));
-  assertEquals(1326259953.26931, x *= (((x>>(x|(-496195134.78045774)))+((2029515886)%(tmp = 1148955580, tmp)))/(tmp = -1760016519, tmp)));
-  assertEquals(0, x &= (((((-273334205)+(tmp = 797224093.682485, tmp))/x)>>>((((tmp = -887577414, tmp)/x)+x)%(tmp = 720417467, tmp)))^(((x-(tmp = -309071035, tmp))>>(-3123114729.33889))/x)));
-  assertEquals(0, x ^= x);
-  assertEquals(0, x %= ((tmp = -2243857462, tmp)/((((((2642220700.6673346)&x)*(tmp = 1454878837, tmp))|((-25825087.30002737)%(851535616.3479034)))<<(tmp = -697581582, tmp))%(tmp = 2248990486, tmp))));
-  assertEquals(0, x >>= (((x|(((tmp = -220437911, tmp)&((((255690498)*(((2993252642)>>>(tmp = 300426048.0338713, tmp))>>x))&((-364232989)+(x<<(-1824069275))))%(x+(tmp = 2696406059.026349, tmp))))+((tmp = 2911683270, tmp)/(tmp = 2718991915, tmp))))*(x/(((tmp = -982851060.0744538, tmp)^((-2903383954)<<((-85365803.80553412)^x)))%(1489258330.5730634))))>>>x));
-  assertEquals(0.7805921633088815, x += (((-1886920875)/(-2417294156.5304217))%(tmp = -1176793645.8923106, tmp)));
-  assertEquals(0, x <<= x);
-  assertEquals(-2215008905, x -= (2215008905));
-  assertEquals(1931542900, x &= (-215923724.72133207));
-  assertEquals(907191462, x ^= (-3133954606.357727));
-  assertEquals(453595731, x >>>= (((tmp = 2726241550, tmp)/(tmp = -332682163, tmp))*((((tmp = 2500467531, tmp)>>>(((x<<(tmp = -1847200310.4863105, tmp))/x)^x))+x)<<(191688342.22953415))));
-  assertEquals(-0.21671182880645923, x /= ((((-1169180683.1316955)%x)>>>(1650525418))^((2198033206.797462)&((-6913973.910871983)%(1758398541.8440342)))));
-  assertEquals(-375102237.1603561, x += (tmp = -375102236.9436443, tmp));
-  assertEquals(1, x &= (((84374105.89811504)|((tmp = -2480295008.926951, tmp)>>((605043461)>>(tmp = -2495122811, tmp))))>>(-2129266088)));
-  assertEquals(1, x |= x);
-  assertEquals(0.0000024171579540208214, x /= (((-2600416098)>>(-2076954196))^x));
-  assertEquals(0.0000024171579540208214, x %= (tmp = -2632420148.815531, tmp));
-  assertEquals(1809220936.0126908, x -= (-1809220936.0126884));
-  assertEquals(1682452118.2686126, x += (((2358977542)<<(x/(tmp = -2862107929, tmp)))+(x+(x%((-3101674407)/(((x*((x>>(tmp = 630458691.3736696, tmp))>>>(tmp = -852137742, tmp)))/x)-((-1875892391.1022017)&(tmp = -1027359748.9533749, tmp))))))));
-  assertEquals(1682452118, x <<= (((tmp = -80832958.07816291, tmp)>>x)%(x-((x^(x<<(tmp = -156565345, tmp)))|((tmp = -1208807363.727137, tmp)/(tmp = 2614737513.304538, tmp))))));
-  assertEquals(6572078, x >>= (-1573364824));
-  assertEquals(13144156, x += x);
-  assertEquals(1731678184, x ^= ((tmp = 593370804.9985657, tmp)|(-3124896848.53273)));
-  assertEquals(845545, x >>>= (tmp = -605637621.2299933, tmp));
-  assertEquals(-1383361088, x ^= (tmp = -1383632087, tmp));
-  assertEquals(-82545896480031520, x += ((x+(1023183845.7316296))*((((tmp = 576673669, tmp)>>(((-584800080.1625061)/(2388147521.9174623))+((((x>>>(-905032341.5830328))^(tmp = -2170356357, tmp))-x)+((136459319)+(-1799824119.689473)))))|x)&(tmp = -2688743506.0257063, tmp))));
-  assertEquals(-895206176, x |= x);
-  assertEquals(-0, x %= x);
-  assertEquals(1791306023, x ^= ((tmp = -3219480856, tmp)+(tmp = 715819582.0181161, tmp)));
-  assertEquals(1791306023, x &= x);
-  assertEquals(2725167636753240600, x *= (1521330025));
-  assertEquals(-281190679, x |= (tmp = -1422045975.798171, tmp));
-  assertEquals(-281190679, x += (x%x));
-  assertEquals(-2342097426.906673, x -= (tmp = 2060906747.906673, tmp));
-  assertEquals(-4651462701.906673, x -= (2309365275));
-  assertEquals(1878, x >>>= (2544974549.345834));
-  assertEquals(1964, x += (x&((1067649861)>>(182139255.7513579))));
-  assertEquals(2209, x += (x>>(tmp = -1775039165, tmp)));
-  assertEquals(0, x -= x);
-  assertEquals(-0, x /= (tmp = -1634697185, tmp));
-  assertEquals(NaN, x /= x);
-  assertEquals(0, x >>>= ((tmp = 3075747652, tmp)&(tmp = 819236484, tmp)));
-  assertEquals(0, x /= ((1276203810.476657)%(-2434960500.784484)));
-  assertEquals(0, x >>>= (tmp = -503633649, tmp));
-  assertEquals(-982731931, x |= (-982731931));
-  assertEquals(-1965463862, x += x);
-  assertEquals(-0.221469672913716, x %= ((tmp = -1742292120, tmp)/x));
-  assertEquals(-0.221469672913716, x %= (-2021391941.1839576));
-  assertEquals(0, x <<= (((((tmp = -2802447851, tmp)>>((2534456072.6518855)&x))%(tmp = 2841162496.610816, tmp))<<((89341820)/(2565367990.0552235)))>>(tmp = 2700250984.4830647, tmp)));
-  assertEquals(0, x >>= x);
-  assertEquals(0, x >>= ((tmp = -636189745, tmp)>>>(x/(((tmp = 2634252476, tmp)%(2026595795))>>(tmp = -2048078394.743723, tmp)))));
-  assertEquals(NaN, x %= ((x%((((x%((tmp = -2583207106, tmp)&x))|(190357769))<<(tmp = 595856931.2599536, tmp))%x))*((-2433186614.6715775)<<((2856869562.1088696)^(tmp = 1112328003, tmp)))));
-  assertEquals(1621713910, x |= (tmp = 1621713910.0282416, tmp));
-  assertEquals(3243427820, x += x);
-  assertEquals(0, x *= (x&(x-x)));
-  assertEquals(0, x >>>= (((2871235439)<<((x+((tmp = -1319445828.9659343, tmp)+(tmp = 1595655077.959171, tmp)))>>(tmp = -86333903, tmp)))-(x/(2907174373.268768))));
-  assertEquals(0, x >>= (-1091774077.2173789));
-  assertEquals(NaN, x /= x);
-  assertEquals(NaN, x *= (tmp = 1976023677.7015994, tmp));
-  assertEquals(NaN, x -= (-3013707698));
-  assertEquals(NaN, x += ((x+(((tmp = -3119865782.9691515, tmp)<<(1327383504.0158405))^(((-143382411.7239611)>>>((-2157016781)+(((-335815848)/x)<<(tmp = 1953515427, tmp))))&(-2715729178))))/(413738158.2334299)));
-  assertEquals(NaN, x %= x);
-  assertEquals(NaN, x += (-845480493));
-  assertEquals(-789816013, x |= (tmp = -789816013.129916, tmp));
-  assertEquals(0, x ^= x);
-  assertEquals(0, x <<= (3032573320));
-  assertEquals(47630, x ^= ((1086705488)%((x^(tmp = -1610832418, tmp))>>>(tmp = 1136352558, tmp))));
-  assertEquals(47630, x >>= (tmp = 1035320352.4269229, tmp));
-  assertEquals(47630, x >>= ((((x^x)<<(x*((((x&((-1657468419)*((tmp = -674435523, tmp)&((tmp = 2992300334, tmp)|x))))*((tmp = -489509378.31950426, tmp)*(tmp = 2276316053, tmp)))>>>x)<<x)))%(tmp = -1209988989, tmp))/(tmp = -2080515253.3541622, tmp)));
-  assertEquals(3192518951.8129544, x += (3192471321.8129544));
-  assertEquals(648116457.8129544, x %= (-2544402494));
-  assertEquals(0, x -= x);
-  assertEquals(NaN, x /= x);
-  assertEquals(NaN, x /= x);
-  assertEquals(0, x <<= x);
-  assertEquals(0, x >>= x);
-  assertEquals(0, x *= (tmp = 30051865, tmp));
-  assertEquals(0, x ^= ((x&(((x&x)>>>(((((((x+(2319551861.0414495))>>>(tmp = -3099624461, tmp))^((((tmp = 1574312763, tmp)|x)>>>((-2723797246)&(tmp = -1993956152, tmp)))|(-1830179045)))|(((((((-2545698704.3662167)>>>x)-(((-79478653)|x)%(x+(x>>((tmp = 2386405508.2180576, tmp)/x)))))>>((((-1947911815.2808042)*((x+(368522081.2884482))-(tmp = 2452991210, tmp)))>>(343556643.1123545))>>((((tmp = 1869261547.537739, tmp)>>(3193214755))|x)&(x*(2027025120)))))<<((-1149196187)>>>(814378291.8374172)))+((((((((-160721403)/(2079201480.2186408))+((x|((((tmp = -299595483.16805863, tmp)>>>((x|((x+x)/(-2359032023.9366207)))<<(tmp = -3095108545, tmp)))>>((tmp = -1547963617.9087071, tmp)*(x>>x)))&((tmp = -1568186648.7499216, tmp)+(((2646528453)^(-2004832723.0506048))>>>(tmp = -3188715603.921877, tmp)))))+(tmp = 1578824724, tmp)))^x)^x)/(tmp = -985331362, tmp))|(tmp = 445135036, tmp))<<(tmp = -73386074.43413758, tmp)))+(((-1674995105.9837937)-(tmp = 1392915573, tmp))>>x)))%(tmp = 1215953864, tmp))&((tmp = -439264643.5238693, tmp)>>>x))+(((tmp = 2311895902, tmp)|(1604405793.6399229))&(tmp = -565192829, tmp))))-x))>>(-2455985321)));
-  assertEquals(0, x %= ((1177798817)>>(tmp = 2081394163.5420477, tmp)));
-  assertEquals(0, x >>>= ((x^(tmp = -41947528.33954811, tmp))>>(x>>>((tmp = 1367644771, tmp)+x))));
-  assertEquals(0, x %= ((x+((tmp = 163275724, tmp)<<((tmp = -514460883.3040788, tmp)+x)))|(tmp = -287112073.2482593, tmp)));
-  assertEquals(0, x &= (3067975906));
-  assertEquals(201342051, x |= (tmp = 201342051, tmp));
-  assertEquals(0, x %= (((((-2580351108.8990865)<<(tmp = 2675329316, tmp))&((1338398946)%((-1548041558)+((x>>(-1568233868.7366815))|((x>>((tmp = -1064582207, tmp)/(-1062237014)))>>(tmp = 854123209, tmp))))))<<(((989032887)*(1842748656))%(tmp = -1566983130, tmp)))-x));
-  assertEquals(-0, x /= (tmp = -828519512.617768, tmp));
-  assertEquals(0, x &= ((((1449608518)+(-1829731972))*(1828894311))*(((tmp = -1121326205.614264, tmp)^(-2057547855))<<(tmp = -2758835896, tmp))));
-  assertEquals(NaN, x %= ((tmp = -2138671333, tmp)%x));
-  assertEquals(0, x &= x);
-  assertEquals(665568613.0328879, x += (665568613.0328879));
-  assertEquals(317, x >>= (2627267349.735873));
-  assertEquals(0, x -= x);
-  assertEquals(0, x &= (((tmp = 3030611035, tmp)*(((tmp = 476143340.933007, tmp)>>(x-(2238302130.2331467)))|(x|x)))%(tmp = 320526262, tmp)));
-  assertEquals(0, x <<= (tmp = 729401206, tmp));
-  assertEquals(0, x >>>= (1721412276));
-  assertEquals(217629949.3530736, x += ((tmp = 217629949.3530736, tmp)%((-931931100.601475)%(x^(tmp = -2149340123.548764, tmp)))));
-  assertEquals(217629949.3530736, x %= (tmp = 2275384959.4243402, tmp));
-  assertEquals(0, x >>>= (1112677437.5524077));
-  assertEquals(0, x *= (500256656.7476063));
-  assertEquals(0, x >>>= x);
-  assertEquals(0, x -= x);
-  assertEquals(0, x -= x);
-  assertEquals(0, x &= (-1076968794));
-  assertEquals(0, x /= (tmp = 1774420931.0082943, tmp));
-  assertEquals(0, x |= x);
-  assertEquals(0, x >>= x);
-  assertEquals(0, x %= (-2978890122.943079));
-  assertEquals(-0, x /= (tmp = -2954608787, tmp));
-  assertEquals(-800048201, x ^= ((tmp = -800048201.7227018, tmp)>>>((-2016227566.1480863)/(tmp = -2263395521, tmp))));
-  assertEquals(3333, x >>>= (-2038839052));
-  assertEquals(487957736.625432, x += (487954403.625432));
-  assertEquals(-1650983426, x |= (2643918270));
-  assertEquals(-1861867448, x &= (tmp = -251254199.12813115, tmp));
-  assertEquals(-7.934314690172143e-18, x %= ((((x^(-703896560.6519544))>>(tmp = -1853262409, tmp))/(tmp = -1168012152.177894, tmp))/(tmp = 837616075.1097361, tmp)));
-  assertEquals(0, x ^= x);
-  assertEquals(0, x &= (tmp = -2328150260.5399947, tmp));
-  assertEquals(-1954860020, x |= (tmp = 2340107276, tmp));
-  assertEquals(-1954860020, x >>= ((tmp = 159177341, tmp)*(x&(-705832619))));
-  assertEquals(-1954895727, x -= (x>>>((-1443742544.7183702)^((((tmp = 869581714.0137681, tmp)+x)^((x%(tmp = -1036566362.5189383, tmp))^(x%x)))>>x))));
-  assertEquals(1.0241361338078498, x /= (tmp = -1908824093.2692068, tmp));
-  assertEquals(16777216, x <<= (x*(((-1925197281)^(tmp = -1392300089.4750946, tmp))|x)));
-  assertEquals(-225882765524992, x *= (tmp = -13463662, tmp));
-  assertEquals(-1845493760, x |= x);
-  assertEquals(-1845493760, x %= (tmp = 3181618519.786825, tmp));
-  assertEquals(0, x ^= x);
-  assertEquals(0, x <<= x);
-  assertEquals(0, x >>>= x);
-  assertEquals(NaN, x /= (x>>>x));
-  assertEquals(NaN, x %= (((((tmp = -521176477, tmp)>>(((tmp = 370693623, tmp)/(((tmp = -1181033022.4136918, tmp)>>(x|(x*(2601660441))))+(tmp = -1696992780, tmp)))|(x|(-1197454193.198036))))>>>(((2512453418.3855605)+((((((tmp = 799501914, tmp)&(((1788580469.7069902)*(((((1476778529.5109258)<<(tmp = -1873387738.3541565, tmp))-((tmp = -521988584.7945764, tmp)*(-1598785351.3914914)))&(-1899161721.8061454))&((x/x)*(690506460))))>>>((tmp = 2255896398.840741, tmp)>>((tmp = -1331486014.6180065, tmp)+(-1159698058.534132)))))*((1112115365.2633948)&((x>>((x>>(-784426389.4693215))&(-492064338.97227573)))>>x)))^((x-((tmp = 2986028023, tmp)>>(tmp = 2347380320.00517, tmp)))*(tmp = -1463851121, tmp)))*(tmp = -1059437133, tmp))%(x-(tmp = 1238739493.7636225, tmp))))^(2029235174)))*(-1923899530))>>>x));
-  assertEquals(0, x >>>= (2848792983.510682));
-  assertEquals(0, x >>= (((tmp = 3042817032.705198, tmp)>>>x)&((((tmp = -829389221, tmp)-((2669682285.8576303)+(tmp = 1812236814.3082042, tmp)))^x)%((tmp = -2401726554, tmp)^((tmp = 2464685683, tmp)|(-2685039620.224061))))));
-  assertEquals(2069649722, x |= (2069649722.311271));
-  assertEquals(NaN, x %= (((((-68757739.39282179)&(-1382816369))/(3122326124))<<(x-(-507995800.3369653)))<<(((-1962768567.343907)+((tmp = 1357057125, tmp)/x))^(tmp = 1997617124, tmp))));
-  assertEquals(NaN, x += x);
-  assertEquals(0, x >>= (26895919));
-  assertEquals(0, x >>>= x);
-  assertEquals(0, x %= (tmp = 1092448030, tmp));
-  assertEquals(0, x <<= (tmp = -477672441.46258235, tmp));
-  assertEquals(0, x /= (2113701907));
-  assertEquals(0, x >>>= x);
-  assertEquals(NaN, x /= x);
-  assertEquals(1341078673, x |= (-2953888623));
-  assertEquals(1341078673, x &= x);
-  assertEquals(0, x %= x);
-  assertEquals(414817852.151006, x -= (-414817852.151006));
-  assertEquals(1006632960, x <<= ((((((126465614.8316778)+(x-(2511803375)))+(tmp = 1620717148.352402, tmp))*x)/(tmp = -3013745105.5275207, tmp))-((tmp = -418034061.6865432, tmp)/(-300492911))));
-  assertEquals(1055624813, x |= (tmp = 921407085, tmp));
-  assertEquals(-3, x |= ((((tmp = 1382397819.7507677, tmp)+(tmp = -111851147.7289567, tmp))+x)/((tmp = 247980405.7238742, tmp)^(tmp = -592156399.8577058, tmp))));
-  assertEquals(35161, x &= (((((((-2973570544.725141)*(tmp = -1244715638, tmp))+x)<<(x/((x>>>(-2143371615.073137))/(226072236))))%((x-(tmp = 1971392936, tmp))^(tmp = 2653103658, tmp)))%((tmp = 2828319571.7066674, tmp)>>((1528970502)^((tmp = -55869558, tmp)%x))))>>(889380585.6738582)));
-  assertEquals(0, x ^= x);
-  assertEquals(0, x *= (2749718750));
-  assertEquals(0, x >>>= ((((-1633495402.6252813)*(tmp = 2943656739.1108646, tmp))+(tmp = 977432165, tmp))&((tmp = -2338132019, tmp)*(408176349.8061733))));
-  assertEquals(-1778794752, x -= (((tmp = -1391412154.5199084, tmp)-((-3172342474)|x))&(1854366052)));
-  assertEquals(-1778794752, x %= (tmp = 2024807296.6901965, tmp));
-  assertEquals(-1114410.466337204, x %= ((tmp = -240344444.24487805, tmp)%(-47661164)));
-  assertEquals(-0, x %= x);
-  assertEquals(0, x >>= (x>>x));
-  assertEquals(0, x *= x);
-  assertEquals(0, x /= ((-3134902611)|(tmp = -3131158951, tmp)));
-  assertEquals(-0, x /= (((tmp = 1430247610.634234, tmp)&x)+((tmp = -2047191110.8623483, tmp)-((((x%((((x/(tmp = -2599234213, tmp))|(tmp = 2650380060, tmp))|x)+x))>>>x)&(-1961373866))<<x))));
-  assertEquals(-718394682, x -= ((x|(tmp = 1764417670.8577194, tmp))%(1046022988)));
-  assertEquals(3576572614, x >>>= (((tmp = 2480472883.078992, tmp)<<x)>>((2035208402.8039393)&(tmp = 492980449, tmp))));
-  assertEquals(434034142, x %= (x&((x>>>(311110449.48751545))|(-243530647))));
-  assertEquals(524703439.3065736, x += (((tmp = 1392771723.3065736, tmp)%(x&x))%(tmp = -2199704930, tmp)));
-  assertEquals(373686272, x &= (x<<((tmp = 2103372351.9456532, tmp)%(tmp = -1367109519, tmp))));
-  assertEquals(373686272, x >>= x);
-  assertEquals(-0.12245430020241108, x /= (tmp = -3051638622.5907507, tmp));
-  assertEquals(1, x /= x);
-  assertEquals(1, x %= (3095983855));
-  assertEquals(-1454736871, x ^= (x*(tmp = -1454736872, tmp)));
-  assertEquals(-1454736866, x ^= (((724989405.7338341)|(tmp = -2834298786.384371, tmp))>>>(tmp = -2029602148.1758833, tmp)));
-  assertEquals(-1454736866, x &= x);
-  assertEquals(-197394432, x <<= (tmp = -1562128975, tmp));
-  assertEquals(251658240, x <<= (tmp = 2126510950, tmp));
-  assertEquals(3295700610.703306, x -= (tmp = -3044042370.703306, tmp));
-  assertEquals(-51152917, x |= ((949179883.1784958)|(((tmp = -2046168220, tmp)>>(x/x))/(((835064313)*(tmp = 2197600689, tmp))^(((tmp = 2717104216, tmp)&x)<<(-1402661995.3845913))))));
-  assertEquals(-1549204421, x ^= ((((tmp = -481013711, tmp)>>>((tmp = 119589341.80209589, tmp)%(-995489985.2905662)))-(635717011))^(x+(x*x))));
-  assertEquals(-1078356672.3999934, x += (470847748.6000067));
-  assertEquals(1484987268.4638166, x += (tmp = 2563343940.86381, tmp));
-  assertEquals(277020804, x &= (tmp = 2532819117, tmp));
-  assertEquals(-2097118208, x <<= (x>>>x));
-  assertEquals(-2147483648, x <<= (tmp = 761285045, tmp));
-  assertEquals(2147483648, x >>>= x);
-  assertEquals(-935909870282997800, x *= ((-2583300643)|x));
-  assertEquals(-370753566.54721737, x %= (-1084543510.4524941));
-  assertEquals(-177, x >>= (-946264747.6588805));
-  assertEquals(-416077682, x ^= (tmp = 416077761, tmp));
-  assertEquals(NaN, x %= ((((tmp = 779607408, tmp)*(((tmp = -3007128117, tmp)*(851442866.6153773))+x))&(1283388806))/(-876363553)));
-  assertEquals(NaN, x %= (x/(tmp = -1668413939.652408, tmp)));
-  assertEquals(-1726405921, x ^= (tmp = -1726405921, tmp));
-  assertEquals(-1, x >>= ((3031008213.807012)>>x));
-  assertEquals(4294967295, x >>>= ((x>>>x)&(tmp = 2788082290, tmp)));
-  assertEquals(8544111670008449000, x *= (tmp = 1989331020.0417833, tmp));
-  assertEquals(268435456, x <<= (tmp = 3121736017.2098465, tmp));
-  assertEquals(-2.1011176170964474e+26, x -= (((tmp = 1392503299, tmp)*(tmp = 1446108825.1572113, tmp))*(x^(tmp = 372776014.213725, tmp))));
-  assertEquals(0, x |= x);
-  assertEquals(0, x >>= ((-112413907.70074797)*(-702798603)));
-  assertEquals(1829518838, x |= (tmp = -2465448458, tmp));
-  assertEquals(57172463, x >>= ((tmp = 2979642955.241792, tmp)%(tmp = -2464398693.291434, tmp)));
-  assertEquals(114344926, x += x);
-  assertEquals(113279134, x &= (2397742238.6877637));
-  assertEquals(54, x >>= (1908522709.6377516));
-  assertEquals(-2.966982919573829e-7, x /= (tmp = -182003070, tmp));
-  assertEquals(0, x <<= (-1078417156));
-  assertEquals(-147831390, x ^= (((-147831390)>>>x)+x));
-  assertEquals(0, x -= x);
-  assertEquals(-242221450.44696307, x -= (tmp = 242221450.44696307, tmp));
-  assertEquals(-484442900, x <<= (((tmp = -2033947265.088614, tmp)&x)/(x^(tmp = -2893953848, tmp))));
-  assertEquals(-3227648, x <<= (x<<((tmp = -193993010, tmp)*((983187830)|(3146465242.2783365)))));
-  assertEquals(-6455296, x += x);
-  assertEquals(-1771542585, x -= (x^(tmp = -1767335879, tmp)));
-  assertEquals(-0, x %= x);
-  assertEquals(0, x >>>= ((((tmp = -1612864670.4532743, tmp)*(tmp = 786265765.210487, tmp))*((((tmp = -893735877.3250401, tmp)*((x^(tmp = -2804782464.233885, tmp))<<x))&(x-x))^x))<<x));
-  assertEquals(0, x -= (x>>>(-1648118674.380736)));
-  assertEquals(0, x >>= ((tmp = -2706058813.0028524, tmp)>>(2745047169)));
-  assertEquals(0, x += x);
-  assertEquals(0, x %= (-898267735.137356));
-  assertEquals(0, x >>>= x);
-  assertEquals(0, x >>= ((265527509)/((tmp = 2190845136.7048635, tmp)+((x>>x)>>>((x%(x-x))&((((-2080184609.8989801)&((-327231633)>>>((tmp = 864849136, tmp)%(((-524363239)*(((((tmp = 2245852565.3713694, tmp)&(1918365.8978698254))>>>(tmp = -2463081769, tmp))-(((2438244059.471446)|((((-135303645.38470244)*(-861663832.2253196))%(tmp = 1273185196.0261836, tmp))|((2261539338.832875)%((320267076.2363237)+x))))>>(tmp = -2731398821, tmp)))/(tmp = -1947938611, tmp)))^x))))>>(tmp = 833666235, tmp))|x))))));
-  assertEquals(-1116704570, x ^= (-1116704570));
-  assertEquals(1379561710, x ^= (tmp = -280362968.19654894, tmp));
-  assertEquals(-1673822208, x <<= x);
-  assertEquals(-1673822208, x |= (x<<(tmp = 1389479193.9038138, tmp)));
-  assertEquals(2559712, x >>>= (-2703763734.0354066));
-  assertEquals(2593499, x ^= (x>>>((tmp = 148668150.03291285, tmp)^(tmp = -1580360304, tmp))));
-  assertEquals(2070393855, x |= (tmp = -2227002907, tmp));
-  assertEquals(304197770, x &= (tmp = 2453257354, tmp));
-  assertEquals(304197770, x <<= ((-669331453.8814087)-(x^(x^(tmp = 33804899.98928583, tmp)))));
-  assertEquals(297068, x >>= x);
-  assertEquals(Infinity, x /= (x-x));
-  assertEquals(NaN, x %= x);
-  assertEquals(0, x ^= x);
-  assertEquals(0, x %= ((tmp = 1723087085, tmp)%(2859382131.304421)));
-  assertEquals(0, x %= (((tmp = 2935439763, tmp)<<(-3163992768.637094))%(tmp = 67176733, tmp)));
-  assertEquals(0, x &= (tmp = 2480771277, tmp));
-  assertEquals(0, x >>>= (x+(tmp = -3168690063, tmp)));
-  assertEquals(0, x *= ((tmp = -1915275449.1806245, tmp)>>>((tmp = -1644482094.1822858, tmp)/(tmp = -432927173, tmp))));
-  assertEquals(0, x += (((2766509428.071809)/(x/((942453848.5423365)/(((tmp = -1284574492, tmp)&((tmp = 760186450.7301528, tmp)-(2464974117.358138)))/((x/(x|(672536969)))*(x>>(-1272232579)))))))>>(x*(-3175565978))));
-  assertEquals(-1277710521, x -= (1277710521));
-  assertEquals(-1277710521, x >>= (((tmp = -2349135858, tmp)-x)-x));
-  assertEquals(-1277710521, x >>= ((tmp = 2135645051, tmp)*(tmp = -2468555366, tmp)));
-  assertEquals(-155971, x >>= (-1294859507));
-  assertEquals(-0, x %= x);
-  assertEquals(0, x >>>= (((861078292.6597499)|(-268063679))-(((((-221864206.9494424)-(-3186868203.2201176))&(tmp = 1287132927, tmp))<<(((tmp = 1964887915, tmp)<<((25908382)^(tmp = -688293519.875164, tmp)))*(2075946055)))&(x-((x>>x)&(1395338223.7954774))))));
-  assertEquals(788002218, x -= (-788002218));
-  assertEquals(716399906, x &= (-1145868506));
-  assertEquals(145776674, x &= (-1661931477.360386));
-  assertEquals(145776674, x |= x);
-  assertEquals(-0.05255700469257692, x /= (tmp = -2773686873, tmp));
-  assertEquals(-660918434, x |= (-660918434.2915542));
-  assertEquals(1223537346, x ^= (tmp = -1871274596, tmp));
-  assertEquals(305884336, x >>= (x&x));
-  assertEquals(-1.1123775647978218e-8, x *= ((tmp = -793393031.4229445, tmp)/((tmp = -503919284, tmp)*(((((tmp = 429810625, tmp)>>>x)-((2091544148.870375)<<(((((x^x)%x)|x)/(-260773261))<<((tmp = -1323834653, tmp)&x))))*((-1231800099.3724015)+x))*((x+((-559726167)^x))>>>((-549148877)<<((((tmp = 1196115201, tmp)/((tmp = -2654658968.390111, tmp)%(tmp = -1044419580, tmp)))*(((((x>>>(733571228))+(2919762692.511447))/(-2718451983.570547))^x)+((2891533060.1804514)^((tmp = -2514488663, tmp)&x))))<<(tmp = -2526139641.6733007, tmp))))))));
-  assertEquals(0, x >>>= x);
-  assertEquals(0, x *= x);
-  assertEquals(0, x |= x);
-  assertEquals(3076984066.336236, x -= ((tmp = -3076984066.336236, tmp)+((tmp = -446575828.5155368, tmp)&x)));
-  assertEquals(1, x /= x);
-  assertEquals(1513281647.839972, x *= (1513281647.839972));
-  assertEquals(1251138155, x ^= ((tmp = 2124481052, tmp)&(2431937351.4392214)));
-  assertEquals(1, x /= x);
-  assertEquals(0, x &= (tmp = 627050040, tmp));
-  assertEquals(497153016, x ^= (497153016));
-  assertEquals(-1112801283, x |= (tmp = 2752196557, tmp));
-  assertEquals(0.5735447276296568, x /= ((((tmp = -500878794, tmp)%(tmp = -2559962372.2930336, tmp))%(2661010102))+(tmp = -1439338297, tmp)));
-  assertEquals(1.0244795995097235e-9, x /= (559840067));
-  assertEquals(0.43468811912309857, x *= (424301391));
-  assertEquals(-1972757928, x ^= (tmp = -1972757928.9227014, tmp));
-  assertEquals(-606757265, x ^= (tmp = -2923461577.264596, tmp));
-  assertEquals(-37, x >>= (((-2736561559.7474318)%(tmp = -27668972.662741184, tmp))*(2774711606)));
-  assertEquals(-1923785671, x += ((-1923785597)+x));
-  assertEquals(-3877639176, x += (tmp = -1953853505, tmp));
-  assertEquals(-4688259242, x -= ((810620066.4394455)>>(((-1474285107.459875)>>x)/(((((-570672326.4007359)>>(tmp = -3086802075, tmp))%x)>>>(((tmp = 286938819.28193486, tmp)>>>((1712478502)>>(tmp = 3045149117.796816, tmp)))<<(tmp = 750463263.292952, tmp)))&(tmp = 2055350255.5669963, tmp)))));
-  assertEquals(-0, x %= x);
-  assertEquals(0, x <<= (1037856162.5105649));
-  assertEquals(0, x *= x);
-  assertEquals(0, x &= (997845077.4917375));
-  assertEquals(0, x *= x);
-  assertEquals(0, x *= x);
-  assertEquals(0, x <<= (((x<<x)&(57691805))>>(786927663)));
-  assertEquals(0, x ^= x);
-  assertEquals(0, x += x);
-  assertEquals(0, x &= (-2131910624.1429484));
-  assertEquals(0, x >>>= (-43787814));
-  assertEquals(-2415062021, x += (tmp = -2415062021, tmp));
-  assertEquals(-4830124042, x += x);
-  assertEquals(-186683401, x |= (tmp = 1960135383, tmp));
-  assertEquals(NaN, x *= ((tmp = -1674740173.9864025, tmp)%(((((((-432895485.7261934)-x)^x)>>>(((-1627743078.3383338)>>(179992151))<<((tmp = 911484278.0555259, tmp)|(((tmp = -3042492703, tmp)>>(((-663866035.302746)>>(((x-((440661929.50030375)>>>(tmp = 263692082, tmp)))*x)+x))/((1546004407)^(((tmp = 2023662889.1594632, tmp)*(tmp = -2456602312, tmp))+(tmp = 755602286.1810379, tmp)))))%((tmp = -336449961, tmp)|(tmp = 206780145, tmp))))))/(1068005219.1508512))<<(tmp = -474008862.6864624, tmp))/(((((((1518711056.5437899)>>>(tmp = 287418286.63085747, tmp))<<(tmp = 2823048707, tmp))^(((x<<(x^(-1600970311)))&(x>>(((tmp = 157300110.7636031, tmp)*(tmp = -3047000529, tmp))&(1743024951.3535223))))>>x))-(tmp = -2895435807, tmp))*((tmp = -314120704, tmp)&(tmp = 1759205369, tmp)))>>(tmp = 1833555960.046526, tmp)))));
-  assertEquals(NaN, x -= (tmp = 694955369, tmp));
-  assertEquals(NaN, x *= (x%x));
-  assertEquals(0, x |= x);
-  assertEquals(0, x ^= x);
-  assertEquals(0, x &= x);
-  assertEquals(NaN, x /= (x+x));
-  assertEquals(NaN, x %= ((tmp = -1595988845, tmp)*((1754043345)>>>(-601631332))));
-  assertEquals(0, x >>>= (tmp = 862768754.5445609, tmp));
-  assertEquals(NaN, x /= x);
-  assertEquals(NaN, x %= x);
-  assertEquals(NaN, x *= (tmp = -1774545519, tmp));
-  assertEquals(0, x >>>= (tmp = -2492937784, tmp));
-  assertEquals(0, x %= ((((x<<(-1657262788.2028513))&((x^(tmp = -671811451, tmp))<<(-2984124996)))^(1455422699.7504625))-((-340550620)>>x)));
-  assertEquals(918278025, x ^= ((tmp = -918278027, tmp)^((tmp = 2889422870, tmp)/(tmp = -657306935.7725658, tmp))));
-  assertEquals(918278025, x %= (2603186571.0582614));
-  assertEquals(107034679.32509923, x %= (tmp = -811243345.6749008, tmp));
-  assertEquals(53517339, x >>= (x%((((x*((tmp = -983766424, tmp)^(-1881545357.8686862)))|(tmp = -1429937087, tmp))>>((x<<x)>>((((tmp = -2347470476, tmp)&x)+((x&x)<<(396061331.6476157)))*(tmp = -3136296453.209073, tmp))))>>>(((tmp = 908427836, tmp)|(tmp = 207737064, tmp))|(((1253036041)-(tmp = 2705074182, tmp))+(-431215157.82083917))))));
-  assertEquals(53477378, x &= ((((-1128036654.165636)*x)+x)>>(x>>(3080099059))));
-  assertEquals(0, x >>= (-590692293));
-  assertEquals(0, x %= (-2395850570.9700127));
-  assertEquals(0, x *= ((tmp = 1377485272, tmp)&(1129370608)));
-  assertEquals(0, x += (x>>>(x%(((((tmp = -1746827236, tmp)+((tmp = -326913490, tmp)&((-58256967)&x)))*(tmp = -1176487022.001651, tmp))>>>(-2089147643))-x))));
-  assertEquals(0, x <<= (tmp = 1073298160.2914447, tmp));
-  assertEquals(-837811832, x ^= (-837811832));
-  assertEquals(102760448, x <<= (tmp = 2833582450.4544373, tmp));
-  assertEquals(0, x &= (((((((tmp = 2595641175, tmp)*x)+(tmp = -2049260172.1025927, tmp))%((2986747823)>>(tmp = -2120598518, tmp)))&((tmp = -2742408622, tmp)&x))>>x)*((1043474247.9601482)&(tmp = 1686365779.9885998, tmp))));
-  assertEquals(0, x >>= ((tmp = 1717862848, tmp)-(tmp = 1077024446.4160957, tmp)));
-  assertEquals(NaN, x /= x);
-  assertEquals(NaN, x /= (-1669429787.975099));
-  assertEquals(NaN, x -= (-2299895633.4807186));
-  assertEquals(138173970, x ^= (138173970.56627905));
-  assertEquals(-2084183776, x <<= (3073345316));
-  assertEquals(-0, x %= x);
-  assertEquals(0, x >>= (-3080556066.068573));
-  assertEquals(0, x &= ((tmp = -2587514820, tmp)*(x-((x^(1995672257))*(1125326747.2339358)))));
-  assertEquals(NaN, x %= x);
-  assertEquals(0, x >>= (tmp = 2139186585, tmp));
-  assertEquals(-1904096640, x |= ((-602301360.1919911)*(-1270444810)));
-  assertEquals(1073741824, x <<= (tmp = -1069467849, tmp));
-  assertEquals(1073741824, x ^= (x-x));
-  assertEquals(536870912, x >>>= (-1579466367.160293));
-  assertEquals(512, x >>= (972402804.3890183));
-  assertEquals(512, x &= (tmp = 2664796831, tmp));
-  assertEquals(16777216, x <<= (-2738292561));
-  assertEquals(0, x >>>= ((((1397663615.3889246)|(1117420260.6730964))-(-1173734560))<<((tmp = 1007006104.0172879, tmp)<<((tmp = -623002097, tmp)%(tmp = -35829654.379403114, tmp)))));
-  assertEquals(1200191544, x ^= (tmp = -3094775752, tmp));
-  assertEquals(71, x >>>= x);
-  assertEquals(71, x |= x);
-  assertEquals(1394763772, x += (1394763701));
-  assertEquals(-1.492717171027427, x /= ((x&(tmp = 1243787435, tmp))-(2043911970.26752)));
-  assertEquals(-1.1002448961224718e-8, x /= ((((835185744)*(((tmp = 2165818437, tmp)^(tmp = 2567417009.1166553, tmp))/x))/x)/(((63485842.39971793)^(2668248282.597389))/x)));
-  assertEquals(0, x <<= (tmp = 1598238578.637568, tmp));
-  assertEquals(0, x |= (x&((tmp = -1812945547.5373957, tmp)>>>x)));
-  assertEquals(0, x >>>= (x+(-1969679729.7299538)));
-  assertEquals(1582033662, x += (tmp = 1582033662, tmp));
-  assertEquals(1, x >>>= x);
-  assertEquals(-550748739, x += ((tmp = -550748740, tmp)/(x&((2537822642.235506)^((-2167656297)%(tmp = 1161201210, tmp))))));
-  assertEquals(-268921, x >>= (tmp = 1916069547.7381654, tmp));
-  assertEquals(-0.00021776939364231114, x /= (tmp = 1234888868, tmp));
-  assertEquals(0, x <<= (-1036375023));
-  assertEquals(0, x &= ((((x/(2398886792.27443))&(x|((-1813057854.1797302)-x)))&(x/(((tmp = 3091133731.4967556, tmp)|(3013139691.823039))<<x)))>>>(2542784636.963599)));
-  assertEquals(0, x += ((x*x)/(tmp = 347079383, tmp)));
-  assertEquals(788347904, x |= ((1462257124.6374629)*((3180592147.4065146)-(x&(1922244678)))));
-  assertEquals(2130672735, x |= (tmp = -2846986145, tmp));
-  assertEquals(-1331327970, x ^= ((656251304)-(tmp = 1489152359, tmp)));
-  assertEquals(-0.14377179742889856, x %= (((2889747597.813753)-(1730428996))/(((tmp = -1378710998, tmp)&x)|x)));
-  assertEquals(-1754612583.143772, x += ((-1754725729)^((-2285838408)>>>(1434074349))));
-  assertEquals(-0, x %= x);
-  assertEquals(0, x &= (tmp = -1031961332, tmp));
-  assertEquals(NaN, x /= x);
-  assertEquals(NaN, x /= (3059476325));
-  assertEquals(NaN, x *= ((x*((((tmp = 13529540.462185979, tmp)&x)^((x<<(-1312696238.1628869))&(-2029766712.3852897)))>>x))/x));
-  assertEquals(1657339940, x ^= ((tmp = -488956817.1491232, tmp)&(tmp = -2352413900.1983714, tmp)));
-  assertEquals(-530683621952432200, x *= (tmp = -320202035.2882054, tmp));
-  assertEquals(229226258, x ^= ((tmp = -1263410990.026416, tmp)+(((-808046349)&(tmp = -1294442506, tmp))&((tmp = 1147437219, tmp)<<((tmp = -820299900, tmp)-(tmp = -1947748943.3443851, tmp))))));
-  assertEquals(7163320, x >>= (-2631307131));
-  assertEquals(-68, x |= (((-1271721343)>>x)%x));
-  assertEquals(-39956523818.38862, x *= (587595938.505715));
-  assertEquals(0, x -= x);
-  assertEquals(0, x >>>= ((x^(x+x))<<(tmp = 265212367, tmp)));
-  assertEquals(0, x |= (((x>>((tmp = 2294761023, tmp)/(x>>(2125624288))))&((-2125650113)|(tmp = 1014409884, tmp)))%(tmp = -527324757, tmp)));
-  assertEquals(0, x >>= ((tmp = 2267075595, tmp)*(-1681569641.8304193)));
-  assertEquals(0, x >>>= x);
-  assertEquals(0.5738410949707031, x -= ((tmp = -1846572645.573841, tmp)%((((((x^(((-156613905.64173532)/x)<<x))+((x|((2405109060)>>>x))^x))/(570585894.8542807))+(x&(-2544708558)))^((((tmp = -2539082152.490635, tmp)+((((-657138283)/(2204743293))-((tmp = -1422552246.565012, tmp)+x))<<(x-x)))>>(x/(x>>>(tmp = -3027022305.484394, tmp))))<<x))&((-2066650303.3258202)/(tmp = -1666842593.0050385, tmp)))));
-  assertEquals(0, x >>>= ((((tmp = 2473451837.613817, tmp)>>((2526373359.1434193)>>(x<<x)))+((tmp = -579162065, tmp)+((tmp = -3115798169.551487, tmp)-(tmp = 933004398.9618305, tmp))))&(tmp = 131167062, tmp)));
-  assertEquals(-2067675316, x ^= (-2067675316.6300585));
-  assertEquals(543772, x >>>= x);
-  assertEquals(-1073741824, x <<= x);
-  assertEquals(3221225472, x >>>= ((x*(1478586441.081221))&(tmp = -3050416829.2279186, tmp)));
-  assertEquals(0, x ^= x);
-  assertEquals(0, x *= x);
-  assertEquals(-1017771903.0298333, x -= (1017771903.0298333));
-  assertEquals(0.6404112721149928, x /= ((tmp = -144667370, tmp)^(-2849599562)));
-  assertEquals(-2410517638773644000, x -= (((tmp = 1759631550, tmp)*x)*((((tmp = -2949481475, tmp)>>>x)*x)|(tmp = -2977983804, tmp))));
-  assertEquals(-0, x %= (x+((((tmp = -1307866327.7569134, tmp)<<((x&((tmp = -2380043169.8405933, tmp)|x))>>(472992789.7639668)))|(((((x<<(tmp = -1416427232.7298179, tmp))%(-1404989679.409946))*((x/(tmp = -992416608, tmp))/(tmp = 524646495, tmp)))-(tmp = 734405570, tmp))>>x))/(1079256317.7325506))));
-  assertEquals(0, x <<= (tmp = 2459834668, tmp));
-  assertEquals(-0, x /= (tmp = -1892164840.5719755, tmp));
-  assertEquals(0, x >>= (x|(((1299844244)>>>(((tmp = -2422924469.9824634, tmp)|x)-((((1914590293.2194016)+(-3033885853.8243046))-((tmp = -1720088308, tmp)%x))<<(tmp = 2210817619, tmp))))<<x)));
-  assertEquals(0, x <<= (((tmp = 3192483902.841396, tmp)>>>(((x^(2944537154))|(tmp = -1334426566, tmp))*(((((((-2705218389)&x)+(1987320749))+(tmp = -111851605, tmp))|(2894234323))-(265580345))&x)))%(((tmp = 1431928204.6987057, tmp)&(tmp = 914901046, tmp))&(x>>>x))));
-  assertEquals(0, x >>>= (tmp = 1941940941, tmp));
-  assertEquals(0, x %= (3089014384));
-  assertEquals(0, x += ((tmp = 2948646615, tmp)*x));
-  assertEquals(-0, x /= (tmp = -1480146895, tmp));
-  assertEquals(NaN, x /= x);
-  assertEquals(NaN, x %= (-2995257724.158043));
-  assertEquals(NaN, x %= (tmp = 2714835455, tmp));
-  assertEquals(NaN, x /= (tmp = -311440765.98078775, tmp));
-  assertEquals(NaN, x -= (-1600234513.697098));
-  assertEquals(0, x <<= x);
-  assertEquals(0, x <<= (-1499045929));
-  assertEquals(-0, x *= (-2491783113));
-  assertEquals(0, x ^= (x%((x>>(((1234398704.3681123)>>>x)%(x+x)))>>(402257223.4673699))));
-  assertEquals(-643225204, x ^= (((-55960194.698637486)+((((721411198)-(((tmp = 1308676208.7953796, tmp)%(2242904895))-x))>>((((tmp = 332791012, tmp)&((tmp = -2094787948, tmp)/((x/(2427791092))^(2444944499.6414557))))%(((x+(1253986263.5049214))+(((((3135584075.248715)+((tmp = -2569819028.5414333, tmp)%(440908176.1619092)))>>>(x<<((3061615025)-x)))%x)%(x+((2369612016)*((((tmp = 1173615806, tmp)*(-1910894327))&(2428053015.077821))*(-55668334.70082307))))))<<(tmp = -2129259989.0307562, tmp)))+(1579400360)))%((-3053590451.8996153)>>x)))+(x>>(x%(x^((-1772493876)^x))))));
-  assertEquals(413738663060841600, x *= x);
-  assertEquals(1581062538.4501781, x %= ((tmp = -1298397672.0300272, tmp)-((2237197923)+(tmp = -1385478459, tmp))));
-  assertEquals(755644566.8709538, x %= (tmp = -825417971.5792243, tmp));
-  assertEquals(1, x /= x);
-  assertEquals(0, x >>>= ((89330582)%(-1012731642.4855506)));
-  assertEquals(0, x >>>= x);
-  assertEquals(NaN, x %= ((x>>>((x/(tmp = -1848848941.2352903, tmp))>>>(tmp = -71862893, tmp)))&(-2385996598.2015553)));
-  assertEquals(NaN, x += (-2292484503.318904));
-  assertEquals(NaN, x *= (2961064461));
-  assertEquals(NaN, x += (x<<((2076798243.6442)/((tmp = -81541044.75366282, tmp)^((3041366498.551101)+((2126874365)/(tmp = -177610359, tmp)))))));
-  assertEquals(NaN, x %= ((x/((x/x)+x))>>>x));
-  assertEquals(NaN, x /= x);
-  assertEquals(NaN, x += (1171761980.678));
-  assertEquals(NaN, x += ((2355675823)<<(-390497521)));
-  assertEquals(NaN, x %= x);
-  assertEquals(0, x &= (tmp = -658428225.56619, tmp));
-  assertEquals(0, x ^= x);
-  assertEquals(0, x <<= (1643310725.5713737));
-  assertEquals(0, x <<= x);
-  assertEquals(0, x <<= (-397005335.3712895));
-  assertEquals(0, x >>>= (tmp = -2804713458.166788, tmp));
-  assertEquals(0, x <<= (((((((tmp = 1879988501, tmp)%(1528081313.9360204))+(1376936736))*((((x>>>((1736268617.339198)>>>(-2598735297.4277673)))<<((((((((-2742982036)/(231867353.4549594))-(875335564))<<x)|((2241386341.742653)<<((-22024910.828409433)&(x<<x))))*(-756987803.5693252))+x)^(tmp = 1084498737, tmp)))<<(1920373881.8464394))&(2370827451.82652)))&(x^(tmp = -891503574, tmp)))<<x)>>>((-1519588625.2332087)^(483024636.2600144))));
-  assertEquals(52193878.40997505, x -= ((tmp = -341753803.40997505, tmp)%(tmp = -96519975, tmp)));
-  assertEquals(-1665844168.938803, x -= (1718038047.348778));
-  assertEquals(3.6962232549405003e-19, x /= (((((-809583468.5507183)>>>((tmp = 286797763, tmp)%((1579183142.7321532)/(1853824036.001172))))<<x)>>(((x|x)^((tmp = -2641304815, tmp)<<(x<<x)))>>(((((268338128.8300134)&(-1778318362.8509881))*(751081373.346478))<<(((525066612)>>(-1139761212))*(2949167563.299916)))<<x)))+((tmp = 664905121, tmp)*((-2208280205)*(3069462420)))));
-  assertEquals(4710721795.110161, x += (((217604832)+((1307891481.781326)-x))+(tmp = 3185225481.328835, tmp)));
-  assertEquals(0, x %= x);
-  assertEquals(0, x -= (((x>>>(x/(tmp = 46977522.46204984, tmp)))>>(-2466993199.615269))&(tmp = 14524430.287991166, tmp)));
-  assertEquals(0, x >>= x);
-  assertEquals(0, x /= (tmp = 578120637, tmp));
-  assertEquals(-17267104, x -= (((tmp = 1515285919.495792, tmp)+(((tmp = -1364790286.7057304, tmp)+((954599071)>>((897770243.1509961)*x)))^x))>>>(566027942.1732262)));
-  assertEquals(-17267104, x &= x);
-  assertEquals(189138241, x ^= ((tmp = 1565742675.9503145, tmp)-((tmp = 1737806643, tmp)|((x*(tmp = -1382435297.5955122, tmp))*(-2820516692.153056)))));
-  assertEquals(189138241, x %= (x*(tmp = -1670678493, tmp)));
-  assertEquals(1693, x %= ((-2328713314)>>>(1623637325)));
-  assertEquals(1693, x %= ((-1019394014)*(x|x)));
-  assertEquals(3386, x += x);
-  assertEquals(9268970871604, x *= (2737439714));
-  assertEquals(-4720.120483643183, x /= (tmp = -1963714889, tmp));
-  assertEquals(-1, x >>= ((x^(((-2404688047.455056)|((1439590234.6203847)<<(tmp = -2496557617, tmp)))/((x<<((tmp = 1865549512.282249, tmp)/(((360384191.55661833)>>(tmp = -1225297117.344188, tmp))>>>(2703264010.4122753))))*(1521960888.0071676))))%(tmp = 2834001448.0508294, tmp)));
-  assertEquals(63, x >>>= (x&(-3079339174.6490154)));
-  assertEquals(0, x >>>= (1039770956.6196513));
-  assertEquals(0, x >>>= (-1074820214));
-  assertEquals(0, x >>>= (x/x));
-  assertEquals(0, x >>= ((tmp = -449117604.2811785, tmp)&x));
-  assertEquals(-0, x /= (tmp = -118266935.1241343, tmp));
-  assertEquals(2226140134, x += (tmp = 2226140134, tmp));
-  assertEquals(2068827161, x ^= ((tmp = -1950744808.846384, tmp)>>((2258661151)^((tmp = -1118176421.8650177, tmp)<<(2828634014)))));
-  assertEquals(123, x >>>= (-1779624840.0515127));
-  assertEquals(0, x >>>= (x|((tmp = -239082904, tmp)<<(tmp = 1404827607, tmp))));
-  assertEquals(0, x >>>= x);
-  assertEquals(1793109749, x ^= (tmp = -2501857547.710491, tmp));
-  assertEquals(855, x >>>= x);
-  assertEquals(0, x >>>= (-847289833));
-  assertEquals(0, x %= (-2271241045));
-  assertEquals(169648072, x ^= (((tmp = 169648072.66759944, tmp)^x)|x));
-  assertEquals(176025927479164930, x *= ((tmp = 1111997198.8803885, tmp)<<(tmp = 2913623691, tmp)));
-  assertEquals(176025926613281700, x += ((tmp = -865883245, tmp)<<(x+(-2624661650))));
-  assertEquals(3406506912, x >>>= ((x|(tmp = 2436016535, tmp))*(((tmp = -1222337225, tmp)<<((1765930268)&x))*(tmp = 1600702938, tmp))));
-  assertEquals(1.694694170868292, x %= (x/(-1597121830.794548)));
-  assertEquals(0, x >>= (tmp = -2443203089, tmp));
-  assertEquals(0, x >>>= (1323174858.2229874));
-  assertEquals(0, x &= ((tmp = 846556929.2764134, tmp)|(((1483000635.0020065)|(-3151225553))|(tmp = -229028309, tmp))));
-  assertEquals(0, x >>= x);
-  assertEquals(0, x >>= ((((((-2677334787)>>>x)>>((tmp = 496077992, tmp)&((((x<<(x*(tmp = 1095163344.2352686, tmp)))+(-952017952))%((x<<((x*x)/(tmp = 2983152477, tmp)))^((tmp = -939521852.1514642, tmp)^(tmp = 143967625.83755958, tmp))))*((tmp = 551827709.8366535, tmp)>>>x))))^((-1552681253.69869)-(-1874069995)))>>>(x>>(x%(tmp = -2554673215, tmp))))|(tmp = -190693051.77664518, tmp)));
-  assertEquals(0, x /= (tmp = 427402761.37668264, tmp));
-  assertEquals(0, x <<= x);
-  assertEquals(0, x |= (x>>>(((((-543326164.0673618)>>>(-2344090136.707964))>>>((((-563350246.6026886)/x)/(1525481037.3332934))&(tmp = -2917983401.88958, tmp)))^(-1094667845.1208413))^x)));
-  assertEquals(0, x &= (1080322749.897747));
-  assertEquals(0, x %= (tmp = -1572157280, tmp));
-  assertEquals(0, x >>>= x);
-  assertEquals(0, x %= ((377280936)|x));
-  assertEquals(708335912, x -= (tmp = -708335912, tmp));
-  assertEquals(2766937, x >>>= x);
-  assertEquals(547342779, x += (tmp = 544575842, tmp));
-  assertEquals(546273751, x -= ((x>>>(472833385.9560914))|((tmp = -1164832103.9970903, tmp)/(3147856452.1699758))));
-  assertEquals(546273751, x &= x);
-  assertEquals(0, x ^= x);
-  assertEquals(0, x >>>= (tmp = -3181805175, tmp));
-  assertEquals(-375546685, x |= (-375546685.08261824));
-  assertEquals(1089992785780217200, x *= (tmp = -2902416209, tmp));
-  assertEquals(0, x %= x);
-  assertEquals(-1854981526, x -= ((x-x)-(-1854981526)));
-  assertEquals(-3709963052, x += x);
-  assertEquals(-316772482, x %= (tmp = -1696595285, tmp));
-  assertEquals(-316772482, x |= x);
-  assertEquals(1, x /= x);
-  assertEquals(0, x -= x);
-  assertEquals(-1418375842, x ^= (-1418375842));
-  assertEquals(-2, x >>= x);
-  assertEquals(-4, x += x);
-  assertEquals(-8388608, x &= (x<<(-350555339.30086184)));
-  assertEquals(-16777216, x += x);
-  assertEquals(-0, x %= x);
-  assertEquals(1083355129, x += (tmp = 1083355129, tmp));
-  assertEquals(0, x &= (((tmp = 389729053, tmp)-(tmp = 2944192190.0939536, tmp))/(x-(2081712461.2657034))));
-  assertEquals(0, x += x);
-  assertEquals(-3, x += ((3147270119.5831738)>>((2455837253.1801558)%((-2100649096)>>(((290236808.01408327)|(x&((2661741230.3235292)|((tmp = 1686874589.4690177, tmp)<<x))))*(x+(tmp = 2327674670, tmp)))))));
-  assertEquals(-3, x %= ((x>>(((-2962686431)%x)>>((((2438370783)-(tmp = 2667305770.4839745, tmp))>>>x)>>>x)))<<((x&(tmp = 1428498616, tmp))|((tmp = 2621728539.102742, tmp)/(-204559901)))));
-  assertEquals(2, x ^= (x|((((tmp = 1751230118.6865973, tmp)/(-867465831.207304))>>((-808143600.0912395)+(-2882191493.0506454)))^x)));
-  assertEquals(2, x %= (-2015954220.2250996));
-  assertEquals(0, x >>>= (tmp = 401373999, tmp));
-  assertEquals(0, x >>= (2371830723));
-  assertEquals(0, x >>>= ((((tmp = 2765919396, tmp)-x)-(530310269.7131671))|(tmp = -615761207.9006102, tmp)));
-  assertEquals(-145389011, x ^= (tmp = -145389011, tmp));
-  assertEquals(-145389011, x |= x);
-  assertEquals(1632929832, x &= (-2518898392));
-  assertEquals(4190540017.751949, x += (tmp = 2557610185.751949, tmp));
-  assertEquals(4980024282.153588, x += ((1841304364.1177452)%(tmp = 1051820099.7161053, tmp)));
-  assertEquals(0, x >>>= (((((1379314342.4233718)>>((-2782805860)^((x%(tmp = 1328845288, tmp))>>>(tmp = 901403219.858733, tmp))))+(x/((tmp = -3078904299, tmp)/x)))/x)|(x|(1399702815))));
-  assertEquals(-1820494882, x ^= (tmp = -1820494882.407127, tmp));
-  assertEquals(-305870376, x %= (tmp = -757312253, tmp));
-  assertEquals(-577530443, x += (x|(tmp = -1958083619.6653333, tmp)));
-  assertEquals(333541412591776260, x *= x);
-  assertEquals(-949341696, x >>= ((((1550069663)<<((x>>>(tmp = 2406565178.902887, tmp))>>>((1844746612.632984)/((tmp = 2233757197, tmp)*((-1524891464.1028347)>>(tmp = 2498623474.5616803, tmp))))))&x)<<(x&(tmp = -370379833.3884752, tmp))));
-  assertEquals(-277202090, x |= ((-762200848.8405354)-(tmp = 1749136282, tmp)));
-  assertEquals(0.13704539927239265, x /= (tmp = -2022702633.373563, tmp));
-  assertEquals(0, x -= x);
-  assertEquals(0, x %= ((132951580.19304836)-((427623236.27544415)-(1212242858))));
-  assertEquals(0, x &= ((449148576)&(-1609588210.249217)));
-  assertEquals(0, x >>= x);
-  assertEquals(0, x -= x);
-  assertEquals(-0, x /= (tmp = -1640777090.9694843, tmp));
-  assertEquals(0, x &= (((tmp = -1923412153, tmp)>>>((x>>(tmp = 3027958119.0651507, tmp))+(60243350)))>>(tmp = -2610106062, tmp)));
-  assertEquals(0, x ^= (((-186998676)/(tmp = 2697937056, tmp))-x));
-  assertEquals(-1147950080, x |= ((2425449461)*(tmp = -2525854833, tmp)));
-  assertEquals(457688198, x ^= (2698274950.660941));
-  assertEquals(8724, x %= ((1174351031)>>>((371599047.36048746)+(3025292010))));
-  assertEquals(0, x <<= (tmp = -710011617, tmp));
-  assertEquals(0, x >>>= (1693410026));
-  assertEquals(1443005362, x ^= ((tmp = -2851961934, tmp)+((((x%x)-(tmp = 547622400, tmp))<<(((tmp = 722396486.5553623, tmp)|x)>>>((((tmp = -542268973.5080287, tmp)<<(tmp = 1347854903.771954, tmp))>>>(tmp = -889664427.7115686, tmp))&((tmp = 1549560114, tmp)*(tmp = 964918035, tmp)))))&(-2422502602.920377))));
-  assertEquals(3986573462, x -= (-2543568100));
-  assertEquals(7973146924, x += x);
-  assertEquals(-1, x >>= (-75987297));
-  assertEquals(-12, x += ((2940824338.64834)>>(tmp = 3061467355, tmp)));
-  assertEquals(-3.8229398525977614e-8, x /= (313894554));
-  assertEquals(-2.890709270374084e-17, x /= (tmp = 1322491989, tmp));
-  assertEquals(0, x |= (x-x));
-  assertEquals(0, x >>>= (tmp = -1205300664, tmp));
-  assertEquals(-0, x /= (((2869505187.6914144)>>(tmp = 1541407065, tmp))/(((-571132581)>>>(x>>x))/((x^(170373762.8793683))>>>((((tmp = -363073421.05897164, tmp)|(((tmp = -1591421637, tmp)>>(1095719702.8838692))&(636687681.9145031)))^x)^(x|x))))));
-  assertEquals(-1487828433, x ^= (-1487828433.3462324));
-  assertEquals(-0, x %= x);
-  assertEquals(1716342498, x -= ((tmp = 2578624798, tmp)^x));
-  assertEquals(1636, x >>= ((264194540)>>>(-801900756)));
-  assertEquals(0, x >>>= ((tmp = 2502688876, tmp)+((x<<(x|((-628272226.0338528)|((x<<(-2083074091))>>>(tmp = 1692123246.8418589, tmp)))))>>(1594759826.990993))));
-  assertEquals(0, x <<= (tmp = -904399643, tmp));
-  assertEquals(NaN, x /= ((x^(x-x))%((tmp = 1744962024.4882128, tmp)%x)));
-  assertEquals(NaN, x /= (-1013142883.1845908));
-  assertEquals(NaN, x /= ((tmp = 793633198, tmp)^(-2993598490.8659954)));
-  assertEquals(0, x &= (x>>((tmp = 1200937851, tmp)<<(((tmp = -2807378465, tmp)&(tmp = -143778237, tmp))|(tmp = -1200772223, tmp)))));
-  assertEquals(0, x <<= x);
-  assertEquals(88144, x |= (((((tmp = 3002723937.8560686, tmp)*(tmp = -3171720774.2612267, tmp))%(((tmp = -2586705978.7271833, tmp)%((x+(-1553704278))&(2405085526.501994)))>>((-240842053)>>>(((((tmp = -1886367228.4794896, tmp)>>>x)^(tmp = 2604098316, tmp))^(tmp = 1362808529, tmp))<<((tmp = -1062263918, tmp)|((-172718753)%(tmp = -1910172365.4882073, tmp)))))))^((1444153362)>>((x&((-1205465523.2604182)^(tmp = -2062463383, tmp)))>>(tmp = 956712476, tmp))))>>((((-1004215312)^((((-1707378612.5424936)^(tmp = 2372161553, tmp))/((tmp = 1802586581, tmp)*((2082257.1896460056)&((tmp = -1270773477, tmp)^(tmp = 942517360.3447798, tmp)))))+x))%((((666494127)^(x^x))>>>(tmp = -2592829775, tmp))+((-1601528223)+((x+(tmp = -2417034771.7409983, tmp))>>>((tmp = -730673817, tmp)*x)))))>>x)));
-  assertEquals(-2603179111.7557006, x -= ((2603267255.755627)+(x/(1200979191.2823262))));
-  assertEquals(1691788185, x >>= (tmp = 3088840032, tmp));
-  assertEquals(-168382533, x |= (tmp = -780750941.4590135, tmp));
-  assertEquals(-168382533, x >>= (60741120.48285198));
-  assertEquals(-134287365, x |= (x*(tmp = 834637940.7151251, tmp)));
-  assertEquals(-1481917089, x -= (tmp = 1347629724, tmp));
-  assertEquals(1, x >>>= x);
-  assertEquals(262144, x <<= (2680216914));
-  assertEquals(1075132032, x ^= (x-((tmp = 3220359552.3398685, tmp)^(((-434474746.6039338)|((((((((tmp = 1945689314.9683735, tmp)>>(1300022273))>>>(333705550))&x)%(588357521))-(x+(x^(((tmp = -134560382, tmp)+x)-((((994246147.7195556)-(-1506599689.7383268))%(x<<x))>>((1256426985.5269494)+(tmp = 1860295952.8232574, tmp)))))))^(((tmp = 917333220.2226384, tmp)>>x)>>>(tmp = 865898066, tmp)))%((x|(x%((tmp = -2660580370, tmp)&(tmp = 2966426022, tmp))))*x)))/(((tmp = 682585452, tmp)&(-3219368609))+((tmp = -1330253964, tmp)+((x&(2857161427))/x)))))));
-  assertEquals(274944, x &= ((2606953028.1319966)-(-1707165702)));
-  assertEquals(266752, x &= ((x<<((x+(x+(x^(-1570175484))))^x))^(x+(x<<(tmp = 90330700.84649956, tmp)))));
-  assertEquals(266752, x &= ((((x*(tmp = 2033225408, tmp))-(x-((tmp = 1507658653, tmp)/(-3016036094))))>>>((1497480588)>>(2784070758)))|(tmp = -3025904401.93921, tmp)));
-  assertEquals(-1680442631, x |= ((x/(445284843))|((tmp = 2614520057.2723284, tmp)<<x)));
-  assertEquals(40851947, x >>>= (tmp = -1577031386.938616, tmp));
-  assertEquals(2493, x >>= ((3044630989.3662357)-(-2670572992.8580284)));
-  assertEquals(-0.0000017317105653562252, x /= (-1439617017.9207587));
-  assertEquals(0, x &= (2359806567));
-  assertEquals(623768541, x ^= (623768541));
-  assertEquals(1028567149.0716183, x += (((tmp = 1307794561, tmp)%(x>>x))-(-404798608.0716183)));
-  assertEquals(-1.2971762489811298, x /= (tmp = -792927830.6471529, tmp));
-  assertEquals(-1.2971762489811298, x %= ((-2426421701.2490773)/(-689566815.3393874)));
-  assertEquals(-2147483648, x <<= x);
-  assertEquals(-2147483648, x &= (tmp = -869991477, tmp));
-  assertEquals(-268435456, x >>= (1383186659));
-  assertEquals(0, x -= x);
-  assertEquals(-2009742037, x |= (-2009742037.5389993));
-  assertEquals(-1386630820, x ^= (627864695));
-  assertEquals(-1033479103975173600, x *= (tmp = 745316697.9046186, tmp));
-  assertEquals(-1628048487, x |= (2662654361));
-  assertEquals(325551, x >>>= (340874477));
-  assertEquals(-1235730537, x ^= (tmp = 3059533880.0725217, tmp));
-  assertEquals(-1235730537, x %= (2247137328));
-  assertEquals(-220200960, x <<= ((x>>x)-x));
-  assertEquals(0, x <<= ((tmp = 337220439.90653336, tmp)|(tmp = 2901619168.375105, tmp)));
-  assertEquals(0, x >>>= ((-2114406183)/x));
-  assertEquals(0, x %= ((1425828626.3896675)/x));
-  assertEquals(0, x >>>= ((3213757494)>>>(2595550834.3436537)));
-  assertEquals(0, x <<= x);
-  assertEquals(-0, x /= ((1544519069.5634403)/((tmp = -1332146306, tmp)&(-762835430.0022461))));
-  assertEquals(0, x ^= x);
-  assertEquals(0, x >>= (x|((((x*((-786272700)+x))<<x)+((tmp = -1868484904, tmp)-(tmp = -1692200376, tmp)))+(-1010450257.6674457))));
-  assertEquals(0, x -= x);
-  assertEquals(0, x ^= (x>>>(706010741)));
-  assertEquals(-964928697, x |= (-964928697));
-  assertEquals(1, x /= x);
-  assertEquals(0, x >>= ((((tmp = 1778003555.3780043, tmp)>>(x%((tmp = -766158535, tmp)^((-2681449292.8257303)%((x-(x|(tmp = 1966478387.2443752, tmp)))^(((tmp = -1848398085, tmp)&x)>>>(tmp = -2860470842, tmp)))))))%(tmp = 2315077030, tmp))^x));
-  assertEquals(0, x ^= x);
-  assertEquals(-288007757, x ^= ((tmp = 183607156.1803962, tmp)-(tmp = 471614914, tmp)));
-  assertEquals(-270573581, x |= (tmp = -849475741.9424644, tmp));
-  assertEquals(-2129929, x |= (((((1942852445)&(tmp = 1280372312, tmp))*(x*(tmp = -1601900291, tmp)))^((509080002.81080174)-(tmp = 2699498226.9164257, tmp)))>>(((-335361221)>>(tmp = 843134832, tmp))%(-35532542))));
-  assertEquals(-232622355, x ^= ((-3060885134.5375547)-(((tmp = 1965966723, tmp)-((tmp = 1248630129.6970558, tmp)<<(tmp = 1859637857.5027392, tmp)))*x)));
-  assertEquals(-52149658093200070, x *= (224181627.31264615));
-  assertEquals(-697122968, x ^= (x-(x+(tmp = 2747211186.407712, tmp))));
-  assertEquals(-2146269688, x &= ((tmp = -1466710519, tmp)^(x/(1419998975))));
-  assertEquals(-536567422, x >>= (((((tmp = -1760701688.999274, tmp)>>(-1821976334))/(((tmp = -1660849531, tmp)>>>x)-((x+((tmp = -2489545009.4327965, tmp)>>>((tmp = -267360771.39148235, tmp)^x)))*(((-1453528661)%x)>>>(((243967010.3118453)/((((((2977476024)>>>((-1630798246)<<x))&(591563895.2506002))*(((2668543723.9720144)>>>x)|(1600638279)))^x)>>(x<<(tmp = -152589389, tmp))))>>>(x|(2821305924.9225664)))))))+(618968002.8307843))%(tmp = -1005408074.368274, tmp)));
-  assertEquals(40962, x &= (114403906));
-  assertEquals(19741977727890, x *= ((-2367133915.963945)>>>(-3119344126)));
-  assertEquals(1313341440, x <<= x);
-  assertEquals(626, x >>>= ((((-333992843)%(tmp = -2742280618.6046286, tmp))>>>x)|x));
-  assertEquals(0, x <<= (2598188575));
-  assertEquals(NaN, x %= x);
-  assertEquals(NaN, x %= x);
-  assertEquals(0, x ^= (x%((2507288229.3233204)&(tmp = -1714553169.9276752, tmp))));
-  assertEquals(0, x /= ((633436914.3859445)>>>(tmp = 1579804050.6442273, tmp)));
-  assertEquals(0, x *= ((tmp = 1172218326, tmp)<<((tmp = -2491306095.8456626, tmp)*(((tmp = 1305371897.9753594, tmp)>>((x^(((3077992060)*x)<<(492815553.904796)))>>((652151523)|x)))%x))));
-  assertEquals(0, x <<= x);
-  assertEquals(0, x %= (1118131711));
-  assertEquals(0, x &= ((tmp = 2734673884, tmp)|(x-((tmp = 2694578672.8975897, tmp)*(((x>>(2350811280.974167))*(1052548515))&(x^(x*(tmp = -1336287059.0982835, tmp))))))));
-  assertEquals(-2632782867.1256156, x += ((tmp = -2743992725.1256156, tmp)+(tmp = 111209858, tmp)));
-  assertEquals(-0, x %= x);
-  assertEquals(0, x >>>= (((tmp = -2050519887, tmp)^(106865302.74529803))>>(1642851915.2909596)));
-  assertEquals(-171964826, x |= (tmp = -171964826.6087358, tmp));
-  assertEquals(-2.113405951193522, x /= (tmp = 81368572.80206144, tmp));
-  assertEquals(3, x >>>= x);
-  assertEquals(0, x %= x);
-  assertEquals(-1717345907.837667, x += (-1717345907.837667));
-  assertEquals(-100964883, x |= (tmp = -109574931.80629134, tmp));
-  assertEquals(-33849857, x |= (-974111718.2433801));
-  assertEquals(1, x >>>= (tmp = -2556222849.005595, tmp));
-  assertEquals(1, x /= x);
-  assertEquals(0, x >>>= (-1796630999.4739401));
-  assertEquals(0, x >>>= x);
-  assertEquals(2031695758, x += (((x/(((tmp = -2364918403, tmp)%(x^((tmp = 277767803.6375599, tmp)>>((((tmp = 540036080, tmp)/(x|(2665298931)))/(x|((x>>(-2035456216.6165116))<<(2143184420.5651584))))^x))))&(tmp = 927798419.8784283, tmp)))-(-2031695758))>>>x));
-  assertEquals(2031695758, x |= x);
-  assertEquals(2031695758, x <<= (((x>>(x%x))|(tmp = -1164531232.7384055, tmp))*x));
-  assertEquals(124004, x >>>= x);
-  assertEquals(529846352, x += ((529722348)%((2417645298.865121)|(x>>(x>>>(x+x))))));
-  assertEquals(60067920, x &= (((tmp = -3166008541.8486233, tmp)-x)|(x%x)));
-  assertEquals(1415594240755200, x *= ((-2786707452.873729)>>(((tmp = -2369315809, tmp)*((1559868465)|(1011218835.1735028)))>>>x)));
-  assertEquals(1415595182259140, x += (941503939.9023957));
-  assertEquals(0, x <<= ((tmp = 2887184784.265529, tmp)/(-2575891671.0881453)));
-  assertEquals(0, x &= ((tmp = -1546339583, tmp)>>>(tmp = -587433830, tmp)));
-  assertEquals(0, x *= (((tmp = 1356991166.5990682, tmp)%(tmp = -284401292, tmp))*(1869973719.9757812)));
-  assertEquals(NaN, x %= x);
-  assertEquals(0, x ^= (((tmp = 92575404.43720293, tmp)>>>(263475358.17717505))%x));
-  assertEquals(0, x <<= (((561514358)*(tmp = -439584969, tmp))%((((-3005411368.7172136)+x)|(-2230472917))&x)));
-  assertEquals(0, x >>= ((x>>>x)-((x-(1630649280.510933))+x)));
-  assertEquals(0, x >>= (tmp = -1772403084.7012017, tmp));
-  assertEquals(0, x *= x);
-  assertEquals(0, x += x);
-  assertEquals(0, x &= x);
-  assertEquals(0, x >>= (tmp = 1622680387, tmp));
-  assertEquals(1033887633558225200, x -= ((-510616337)*(tmp = 2024783695, tmp)));
-  assertEquals(-2.8073538539158063e+27, x *= (tmp = -2715337492, tmp));
-  assertEquals(-2.8073538539158063e+27, x -= ((tmp = -1664804757, tmp)&((tmp = -226616419, tmp)>>>(1006711498))));
-  assertEquals(1894539615, x |= (tmp = -2400427681.1831083, tmp));
-  assertEquals(7400545, x >>= (774629608.4463601));
-  assertEquals(456756268, x += (449355723));
-  assertEquals(285771784, x &= (-1316427366));
-  assertEquals(17, x >>= ((tmp = -220509931.20787525, tmp)*(((tmp = 2518859292, tmp)+(-1477543005.1586645))>>(tmp = 3172820250.687789, tmp))));
-  assertEquals(85924262443, x *= (x*((tmp = -2856669745.965829, tmp)&(((tmp = 401420695, tmp)^(tmp = 2355371132, tmp))|(tmp = 590645330.021911, tmp)))));
-  assertEquals(1703875715, x ^= ((-2576394029.7843904)-x));
-  assertEquals(1703875715, x %= (tmp = 2234144310, tmp));
-  assertEquals(271405807, x ^= (1973569132));
-  assertEquals(1060178, x >>>= (tmp = -84823096, tmp));
-  assertEquals(8, x >>>= (tmp = 2246120561.905554, tmp));
-  assertEquals(-2846791089, x += (-2846791097));
-  assertEquals(104933962, x &= (x-(-2969030955.99584)));
-  assertEquals(489215611.96215343, x -= (-384281649.96215343));
-  assertEquals(489215611, x |= x);
-  assertEquals(1186191360, x <<= ((tmp = 774407142.993727, tmp)%x));
-  assertEquals(1186191360, x %= (1555004022));
-  assertEquals(-1697134080, x ^= (tmp = -597421568, tmp));
-  assertEquals(-1102053376, x <<= ((-927370769.4059179)^((tmp = 1093490918, tmp)>>(((-2522227493.3821955)%x)+(-2657319903)))));
-  assertEquals(1086450058, x ^= (-23991926.187098265));
-  assertEquals(1086450058, x |= x);
-  assertEquals(-1.6554590588410778, x /= (x|(x<<(x+x))));
-  assertEquals(67108863, x >>>= ((-926530233)+x));
-  assertEquals(494553310, x ^= (tmp = 512079649, tmp));
-  assertEquals(207751168, x &= (2892146720.6261826));
-  assertEquals(207751168, x &= x);
-  assertEquals(207751168, x |= x);
-  assertEquals(6340, x >>>= (((((x<<(x-((-2819638321)*((x<<x)+x))))>>x)+(tmp = 2016170261, tmp))+(tmp = 2755496043.772017, tmp))+(-841368625.1402085)));
-  assertEquals(6340, x ^= ((x/(tmp = -192734784, tmp))>>>(((-140306239)&x)-x)));
-  assertEquals(1, x /= x);
-  assertEquals(0, x >>= x);
-  assertEquals(26786600, x ^= (tmp = 26786600, tmp));
-  assertEquals(-0.014657576899542954, x /= ((-1454855938.0338)+(-372635753.3681567)));
-  assertEquals(0, x &= ((tmp = 2480635933, tmp)&(-2986584704.9165974)));
-  assertEquals(-2108639122, x += ((tmp = 2108639123.8683565, tmp)^((-881296055)/(((x<<(2026200582))|(tmp = -862495245.138771, tmp))-(-1111596494.892467)))));
-  assertEquals(1893466112, x <<= (tmp = 607974481, tmp));
-  assertEquals(1893466112, x |= x);
-  assertEquals(1133122783.997418, x += ((tmp = -760343332, tmp)-((x-(tmp = -878561823.4218843, tmp))/(tmp = -693454632.596637, tmp))));
-  assertEquals(8, x >>>= (tmp = 700339003.3919828, tmp));
-  assertEquals(4.605305035175536e-9, x /= (1737127060.8343256));
-  assertEquals(4.605305035175536e-9, x -= ((x%(897221779))>>>x));
-  assertEquals(-1864423625.5704088, x += (tmp = -1864423625.5704088, tmp));
-  assertEquals(1132240092, x <<= (1304417186.1193643));
-  assertEquals(-2088985380, x ^= (x<<x));
-  assertEquals(-4, x >>= ((tmp = 1959823884.0935726, tmp)%(-1679792398.569136)));
-  assertEquals(-268435456, x <<= ((tmp = 2586838136, tmp)|((tmp = -481716750.718518, tmp)>>>((1485826674.882607)/(tmp = -2826294011, tmp)))));
-  assertEquals(-32768, x >>= (2060648973));
-  assertEquals(1, x /= x);
-  assertEquals(-2838976297, x -= (tmp = 2838976298, tmp));
-  assertEquals(-1382985298, x <<= ((tmp = -2104305023, tmp)&x));
-  assertEquals(10, x >>>= (x+x));
-  assertEquals(10, x -= (x>>>(361588901.70779836)));
-  assertEquals(854603510, x -= (-854603500));
-  assertEquals(-557842432, x <<= (tmp = 1212985813.6094751, tmp));
-  assertEquals(-459390188241943040, x *= (tmp = 823512450.6304014, tmp));
-  assertEquals(-232800033621957060, x /= ((((((686635689)/(tmp = 2013252543, tmp))*(tmp = -1591617746.8678951, tmp))|(((tmp = -1777454093.5611362, tmp)>>>((tmp = 2680809394, tmp)^(((x>>((((((tmp = -265022244, tmp)%((tmp = -3075004537, tmp)>>(((((1427784269.5686688)^((tmp = -1095171528.911587, tmp)^(-942424985.7979553)))>>(-1279441481.1987405))*((2493620394)>>(-2769016043)))/(x&((tmp = 2059033657, tmp)%(((tmp = 1948606940.1488457, tmp)-(tmp = -2645984114.13219, tmp))^x))))))^x)^x)%(x%((((tmp = 3209433446.4551353, tmp)%(tmp = 1364430104.0424738, tmp))/(tmp = -2103044578.349498, tmp))+(tmp = -2613222750, tmp))))*(2099218034)))&(((tmp = -378500985.49700975, tmp)>>(((x+x)|(x%(((-1841907486)<<(-1220613546.194021))<<(tmp = -1260884176, tmp))))^(tmp = 1858784116, tmp)))>>>((x%x)%((x>>>(tmp = -2540799113.7667685, tmp))|x))))/((((tmp = 642072894.6455215, tmp)-(-324951103.6679399))*(tmp = 1424524615, tmp))+((x<<(tmp = -904578863.5945344, tmp))*(tmp = 49233475.435349464, tmp))))))<<(tmp = 1680210257, tmp)))+((tmp = -1516431503, tmp)>>>(-1105406695.3068116)))/(-275019361.6764543)));
-  assertEquals(192359387.42913792, x /= (-1210234846));
-  assertEquals(192359387.42913792, x %= (-2920206625.0154076));
-  assertEquals(192359387.42913803, x -= (((((((tmp = -1263203016.3258834, tmp)-(2432034005.6011124))&x)<<(1479434294))>>((tmp = -1695856315.523002, tmp)>>>(tmp = 557391345, tmp)))/(tmp = -1280240246.2501266, tmp))%((tmp = -2196489823.034029, tmp)>>(((x&((912221637.1101809)+((tmp = -3003677979.652423, tmp)>>(tmp = -716129460.1668484, tmp))))-((x+(x-(-2780610859)))>>>(-2445608016)))<<((x*(x+(x+(((-2124412727.9007604)%(tmp = -593539041.5539455, tmp))&(tmp = 2404054468.768749, tmp)))))%(x>>(tmp = -2913066344.404591, tmp)))))));
-  assertEquals(11740, x >>= (688848398.7228824));
-  assertEquals(11740, x >>= ((1545765912)*(307650529.9764147)));
-  assertEquals(23480, x += x);
-  assertEquals(0, x >>>= ((tmp = 1313078391, tmp)|x));
-  assertEquals(1726251264, x -= ((1939413887)<<(1004888744.2840619)));
-  assertEquals(765324793.5278986, x %= (960926470.4721014));
-  assertEquals(747387, x >>= ((2483010044)-(tmp = -413698190, tmp)));
-  assertEquals(1, x /= x);
-  assertEquals(3016811624, x *= (3016811624));
-  assertEquals(17408, x &= (((tmp = -991624868, tmp)<<(((63107932)/(tmp = 2659939199, tmp))|(tmp = -1968768911.3575773, tmp)))>>(((-2876822038.9910746)|(tmp = 2550230179.243425, tmp))<<((x*(x<<((x<<((tmp = -1627718523.616604, tmp)|((2154120561.254636)-(x%(x<<(1484563622.1791654))))))<<((((x^(tmp = 3016524169, tmp))<<(((x+(tmp = 1887816698.2455955, tmp))+x)-x))-(-3023329069))-x))))+x))));
-  assertEquals(0, x <<= (((1247441062.177967)/(-1717276234))+x));
-  assertEquals(0, x |= ((x%((-1648299429.4520087)>>(-137511052)))>>(tmp = 221301016.4926411, tmp)));
-  assertEquals(0, x /= ((-2598501544.913707)>>>(-2177037696)));
-  assertEquals(NaN, x %= (x>>x));
-  assertEquals(0, x &= (tmp = 1852419158, tmp));
-  assertEquals(-829029120, x |= (((2122339180)*((((((tmp = 768748914, tmp)<<((1008490427)&((1937367899.957056)-(((635094486)>>(((tmp = -795046025, tmp)*(2665104134.4455256))^(tmp = 706594584.2462804, tmp)))/(504397522)))))/(-556057788))>>((x/(tmp = -2732280594, tmp))-x))+(-1989667473))+(tmp = 2766802447.789895, tmp)))<<(((tmp = -2969169096, tmp)-x)+(tmp = 2093593159.0942125, tmp))));
-  assertEquals(0.6451933462602606, x /= ((-1284931292)<<(x<<(tmp = 1294716764, tmp))));
-  assertEquals(1515416866.520901, x *= (2348779440));
-  assertEquals(-1620606242886682600, x *= ((-993898625.5357854)&(((tmp = -571100481, tmp)/x)*((2428590177.311031)%(tmp = -2671379453, tmp)))));
-  assertEquals(-1137472828, x %= (tmp = -1195183004, tmp));
-  assertEquals(-3096634005473250000, x *= (tmp = 2722380640, tmp));
-  assertEquals(-3096634003996758500, x -= (-1476491033.833419));
-  assertEquals(-3096634000805538000, x += (3191220521.978341));
-  assertEquals(-3096634000805468000, x += ((((tmp = -3024976741, tmp)&(952616360))|((x*(-1547952311))+(x*x)))>>>(tmp = 981373323, tmp)));
-  assertEquals(-3096633998655594000, x += (2149873927));
-  assertEquals(-118812224101.54297, x %= (((2641881276.9898443)*(((502159480)^x)<<x))%((tmp = -2840045365.547772, tmp)*(((((-2297661528)>>>(x>>(-229103883.94961858)))&(((-1285047374.6746495)<<((-360045084)>>>((x-(tmp = -956123411.1260898, tmp))%x)))>>((tmp = -2375660287.5213504, tmp)+((((tmp = -2753478891, tmp)>>>(((tmp = 101438098, tmp)>>(((tmp = -2736502951, tmp)<<((tmp = -3084561882.368902, tmp)&(tmp = 1491700884, tmp)))|x))&(tmp = 1627412882.6404104, tmp)))>>>(tmp = 1039002116.6784904, tmp))<<((tmp = -2840130800, tmp)-(tmp = -740035567, tmp))))))&(tmp = -416316142, tmp))>>x))));
-  assertEquals(86, x >>>= (tmp = -293489896.5572462, tmp));
-  assertEquals(172, x += (x%((((-2635082487.364155)|((-2361650420.634912)&(-2147095650.7451198)))<<((tmp = 2258905145.9231243, tmp)%((((tmp = -1365987098.5130103, tmp)*(((((((932437391)/x)/(289270413.0780891))%(x-x))+((((2194986374.917528)>>(((((tmp = -1553805025, tmp)|x)^(((x>>(-564400586.0780811))^(tmp = 1738428582.0238137, tmp))>>(tmp = 1717774140, tmp)))&(tmp = -2789427438, tmp))%(((tmp = -1386118057, tmp)*(-2333221237.7915535))*(x>>>(((((41346648.46438944)&x)%(-478973697.6792319))|(tmp = 2108106738, tmp))/x)))))-(tmp = -133437701.64136505, tmp))>>>x))+(tmp = -1567210003, tmp))*(x+((x&x)-(2942851671)))))>>>(tmp = -446377136, tmp))*((((((tmp = 1597203255, tmp)>>>(619157171))|(-2766246629.005985))>>((tmp = 3130227370, tmp)%x))*(tmp = 2072227901.6101904, tmp))|((tmp = 1369019520, tmp)^(759659487))))))>>>x)));
-  assertEquals(1996475731, x ^= ((1456327892.2281098)|(1728022827)));
-  assertEquals(0, x %= x);
-  assertEquals(0, x &= (1323847974));
-  assertEquals(3076829073.8848357, x += (3076829073.8848357));
-  assertEquals(9569842648396755000, x *= (3110293883.2782717));
-  assertEquals(9569842646260304000, x -= (2136450372.9038036));
-  assertEquals(9.158188827418242e+37, x *= x);
-  assertEquals(0, x <<= ((x&(tmp = -2241179286, tmp))+((tmp = 2553144081, tmp)&((tmp = -1914709694, tmp)^(tmp = -1469651409.0651562, tmp)))));
-  assertEquals(0, x <<= x);
-  assertEquals(0, x /= (2177840666.276347));
-  assertEquals(0, x %= (-690827104));
-  assertEquals(0, x >>>= x);
-  assertEquals(0, x ^= x);
-  assertEquals(-0, x /= (tmp = -803415280, tmp));
-  assertEquals(-2355576914.316743, x += (-2355576914.316743));
-  assertEquals(-833671722514674000, x *= ((3053388806.692315)-(tmp = 2699474775.081724, tmp)));
-  assertEquals(1, x /= x);
-  assertEquals(1898147684, x += ((tmp = 1898147683, tmp)|(x<<x)));
-  assertEquals(2.192324660388075, x %= ((tmp = 2630187518, tmp)/((2868794982.790862)|(490860748))));
-  assertEquals(0, x >>>= ((2751021779)/(-952522559)));
-  assertEquals(321040461, x ^= ((321040461.153594)-x));
-  assertEquals(-2.3814602031636922, x /= ((tmp = -170472190, tmp)|x));
-  assertEquals(-1, x >>= (2200125174.177402));
-  assertEquals(-2964432647.9379396, x += (-2964432646.9379396));
-  assertEquals(-370116502.93793964, x %= (tmp = -518863229, tmp));
-  assertEquals(777927355.2283959, x -= (-1148043858.1663356));
-  assertEquals(0, x *= ((tmp = 1134913539, tmp)&(((x>>>((tmp = -989822787, tmp)>>>x))%x)&(tmp = 1078636160.7313156, tmp))));
-  assertEquals(-1089245637, x ^= (3205721659.3548856));
-  assertEquals(-1192493056, x <<= (-1173291054));
-  assertEquals(78013832, x += ((tmp = 2462999944, tmp)+x));
-  assertEquals(0, x %= x);
-  assertEquals(0, x >>>= (1794908927.7409873));
-  assertEquals(1708338504, x += ((-2586628792.3484306)<<x));
-  assertEquals(12, x >>= (-545794789.3827574));
-  assertEquals(0, x &= ((2753207225)<<(((-1776581207.557251)+((tmp = -2414140402, tmp)*x))+(x<<(x|(tmp = 772358560.3022032, tmp))))));
-  assertEquals(0, x <<= ((tmp = -2755724712.152605, tmp)/((x>>(-732875466))&x)));
-  assertEquals(NaN, x *= (((tmp = 2617815318.1134562, tmp)/x)%(x|((((((-851659337.194871)<<(tmp = 2072294700, tmp))%((x+(2193880878.5566335))^((tmp = 3005338026, tmp)-(2947963290))))/x)/(x+(2091745239.4210382)))-(x>>x)))));
-  assertEquals(NaN, x /= (tmp = -427684595.0278094, tmp));
-  assertEquals(NaN, x /= (tmp = -263945678, tmp));
-  assertEquals(0, x <<= x);
-  assertEquals(0, x <<= x);
-  assertEquals(0, x -= (((x>>((x&x)-(tmp = -673697315, tmp)))>>(((1575095242.2330558)/(x-(-1816886266)))%(-1580195729)))>>>x));
-  assertEquals(0, x >>>= x);
-  assertEquals(0, x >>= (-2815518206));
-  assertEquals(0, x -= (x/(1795634670.692437)));
-  assertEquals(-2753579891, x += (tmp = -2753579891, tmp));
-  assertEquals(2.7773776150171776, x /= (tmp = -991431585, tmp));
-  assertEquals(5.554755230034355, x += x);
-  assertEquals(3.362161997528237e-9, x /= (1652137890.4758453));
-  assertEquals(3.362161997528237e-9, x %= (tmp = -10848734.527020693, tmp));
-  assertEquals(1, x /= x);
-  assertEquals(-2978012493, x -= (x+(2978012493)));
-  assertEquals(-5.158905851797543, x /= (((x+((tmp = -2548840164, tmp)>>x))<<(x^((tmp = -533281232.7294345, tmp)&x)))&(tmp = -1502692171, tmp)));
-  assertEquals(-5.158905851797543, x %= (-3009435255.5612025));
-  assertEquals(-20971520, x <<= ((tmp = -2728812464, tmp)%(2619809573.672677)));
-  assertEquals(-1900019712, x &= (2398099552));
-  assertEquals(-1991377, x %= ((tmp = 1562364373.7334614, tmp)>>>(((x-(-946283217))<<(-2044590694))^(((tmp = 1681238509, tmp)>>(-2801649769))-x))));
-  assertEquals(1, x /= x);
-  assertEquals(1, x %= (x/(x-x)));
-  assertEquals(1.3525631913093335e-9, x /= (739336991));
-  assertEquals(0, x &= ((x&(x|(-1530424204)))<<((((tmp = -295143065.9115021, tmp)>>x)+x)<<x)));
-  assertEquals(0, x <<= (-1311017801));
-  assertEquals(-0, x /= (-667133339.1918633));
-  assertEquals(1038307283, x += (1038307283));
-  assertEquals(506985, x >>>= ((tmp = 1550624472.9157984, tmp)^x));
-  assertEquals(506985, x >>>= ((254646626)<<(tmp = 1572845412.744642, tmp)));
-  assertEquals(32447040, x <<= (tmp = -2427326042, tmp));
-  assertEquals(0, x -= (x<<((x|x)>>>x)));
-  assertEquals(0, x &= x);
-  assertEquals(0, x &= ((-484420357)|((tmp = 807540590.6132902, tmp)/(x/x))));
-  assertEquals(-890607324, x ^= ((tmp = -890607324, tmp)>>((((-2876826295)>>x)<<((tmp = 2351495148.117994, tmp)>>(tmp = 1368611893.274765, tmp)))*(tmp = 1531795251, tmp))));
-  assertEquals(-729075363, x += (x+(tmp = 1052139285, tmp)));
-  assertEquals(531550884933581760, x *= x);
-  assertEquals(1980836332, x ^= ((-746269795.2320724)-((2400458512)>>((1290672548)>>>((((1536843439.5629003)&(3185059975.158061))*(tmp = -1339249276.2667086, tmp))&x)))));
-  assertEquals(941373096, x %= ((x+(-451098412))^(tmp = 1725497732, tmp)));
-  assertEquals(-1766019323, x += (tmp = -2707392419, tmp));
-  assertEquals(2528947973, x >>>= (x^(-896237435.3809054)));
-  assertEquals(-263192576, x <<= (-866361580));
-  assertEquals(-2008, x >>= (-2608071791));
-  assertEquals(-88, x %= (((-1076807218.4792447)&((tmp = 601044863, tmp)>>((tmp = 1228976729, tmp)+((((-2711426325)*x)|x)|(x%(-2700007330.3266068))))))&(tmp = 3147972836.778858, tmp)));
-  assertEquals(1762886843, x ^= (tmp = 2532080403, tmp));
-  assertEquals(1762886843, x %= ((((((tmp = -2059247788, tmp)>>x)/x)+(x<<x))^x)>>>(-1969283040.3683646)));
-  assertEquals(4812334726.587896, x += (tmp = 3049447883.587897, tmp));
-  assertEquals(1, x /= x);
-  assertEquals(1, x *= x);
-  assertEquals(-2150507334, x -= ((tmp = 1578221999, tmp)+(tmp = 572285336, tmp)));
-  assertEquals(-4546475858941548500, x *= ((tmp = -931533139.5546813, tmp)^(tmp = 3061503275, tmp)));
-  assertEquals(-269064192, x |= ((207217276.91936445)<<(tmp = -957353678.4997551, tmp)));
-  assertEquals(1, x /= x);
-  assertEquals(1, x <<= (((1463856021.8616743)%(x*(tmp = -2286419102, tmp)))/(-2852887593)));
-  assertEquals(2223868564.8383617, x *= (tmp = 2223868564.8383617, tmp));
-  assertEquals(918797189.9033995, x -= ((1305071374.9349623)%(x+(2211992629))));
-  assertEquals(-2212004787.4668465, x -= (tmp = 3130801977.370246, tmp));
-  assertEquals(31783, x >>= (2951958960));
-  assertEquals(31783, x ^= ((((tmp = -2441511566, tmp)&((tmp = 91427553.90168321, tmp)+((tmp = 3001737720.327718, tmp)%x)))>>>(-2263859841))>>>((2109161329)>>(tmp = -2816295136.7443414, tmp))));
-  assertEquals(4068224, x <<= (x%((tmp = -682576250.4464607, tmp)*(x/(((x-x)>>>(x&((((x<<(x<<x))>>>((((2243036981.528562)/(((-1839328916.9411087)>>(-1907748022.162144))<<(x+x)))+((tmp = 2362574171, tmp)<<(tmp = 1987834539, tmp)))|(-444329240)))|(399451601.1717081))>>x)))&(968363335.6089249))))));
-  assertEquals(0.0030991932898194294, x /= ((tmp = 1067316540.5529796, tmp)^(-2388640366)));
-  assertEquals(0, x >>= x);
-  assertEquals(0, x >>>= (tmp = -393433349.1636851, tmp));
-  assertEquals(0, x *= (((x^(((1806955787.471396)<<x)^((517668047.55566347)>>>(x%(x<<(tmp = -276586733.4844558, tmp))))))%(1661242196.1472542))|x));
-  assertEquals(0, x |= (x>>x));
-  assertEquals(-155236210, x |= (tmp = -155236210.19366312, tmp));
-  assertEquals(-606392, x >>= ((tmp = -1533446042.97781, tmp)^x));
-  assertEquals(-1, x >>= (936126810));
-  assertEquals(2325115611, x -= (-2325115612));
-  assertEquals(0, x -= x);
-  assertEquals(0, x >>= (tmp = -354826623, tmp));
-  assertEquals(-0, x *= (-1232528947.7321298));
-  assertEquals(0, x |= x);
-  assertEquals(0, x <<= (((tmp = 187758893.4254812, tmp)&(x-(tmp = 648201576, tmp)))&(385106597)));
-  assertEquals(0, x >>= (tmp = 2554891961, tmp));
-  assertEquals(-1311492611.2970417, x += (-1311492611.2970417));
-  assertEquals(-688179220.3221785, x += (623313390.9748632));
-  assertEquals(1416835528, x &= (tmp = 1953739224, tmp));
-  assertEquals(-11.04719252755072, x /= (-128252995));
-  assertEquals(-6.287413042114223e-9, x /= (tmp = 1757033052.1558928, tmp));
-  assertEquals(-4231171, x |= (((((2022730885.7773404)*((-2495777565.221855)|(tmp = 274627292, tmp)))<<(-3072596920.4902725))>>>((-2215057529)+(-1134713759.4247034)))^((tmp = -1888181788, tmp)/(572025985.2748461))));
-  assertEquals(-4194305, x |= ((tmp = 167328318.038759, tmp)>>>(153800904.34551537)));
-  assertEquals(-1316525687, x -= (1312331382));
-  assertEquals(1448723245.7863903, x += (2765248932.7863903));
-  assertEquals(1.7219707102205526, x /= (tmp = 841317008, tmp));
-  assertEquals(1872027792.5217001, x *= (x|(tmp = 1087142645.6665378, tmp)));
-  assertEquals(3504488055973669400, x *= x);
-  assertEquals(-1075254784, x |= x);
-  assertEquals(-5, x >>= (((844461331.8957539)-((x&x)<<((tmp = 1443904777, tmp)+(tmp = 736164505.3670597, tmp))))-(((tmp = 1348422110, tmp)>>((tmp = -2878252514, tmp)/(-1175443113)))|((-2138724317)%(2057081133)))));
-  assertEquals(-3.038875804165675e-9, x /= (1645345292.8698258));
-  assertEquals(1.25204541454491e-18, x /= (-2427129055.274914));
-  assertEquals(-1.7151576137235622e-9, x *= (-1369884505.6247284));
-  assertEquals(1590804618, x ^= (1590804618.4910607));
-  assertEquals(5061318665300252000, x *= (x+x));
-  assertEquals(5061318665300252000, x %= ((tmp = 1102144242, tmp)*x));
-  assertEquals(-7, x >>= (2772167516.624264));
-  assertEquals(16383, x >>>= (-2979259214.5855684));
-  assertEquals(47108415435, x *= ((2944456517.839616)>>>(1041288554.5330646)));
-  assertEquals(61, x >>>= (x^(((-1305163705)<<((948566605)-x))-x)));
-  assertEquals(0, x %= x);
-  assertEquals(0, x ^= (((tmp = 1918861879.3521824, tmp)/((x%(tmp = 945292773.7188392, tmp))%(x|x)))>>x));
-  assertEquals(-0, x *= ((((x|((2810775287)|(tmp = 1265530406, tmp)))^((tmp = 3198912504.175658, tmp)-(((tmp = 1422607729.281712, tmp)<<(tmp = 2969836271.8682737, tmp))&x)))<<((tmp = 844656612, tmp)*(((((tmp = -828311659, tmp)%(((-2083870654)>>>(x^(((((933133782)-(tmp = 1033670745, tmp))-(629026895.4391923))%((-605095673.8097742)*((((-227510375.38460112)*x)+x)&(((((tmp = 472873752.68609154, tmp)^(tmp = 2815407038.712165, tmp))+((x>>>((tmp = -1331030665.3510115, tmp)>>>(2281234581)))-(x>>>x)))&(tmp = -2160840573.325921, tmp))&x))))<<(tmp = 1411888595, tmp))))|(((tmp = -915703839.0444739, tmp)/((x+(418836101.8158506))%(-1112605325.4404268)))&((-3098311830.6721926)-x))))-((49446671.477988124)*(-2522433127)))+((tmp = 443068797, tmp)>>(tmp = 418030554.97275746, tmp)))*((tmp = 38931296.738208175, tmp)+(1842742215.3282685)))))-((tmp = 1325672181.205841, tmp)^(tmp = 669284428, tmp))));
-  assertEquals(-0, x *= (tmp = 93843030, tmp));
-  assertEquals(0, x ^= x);
-  assertEquals(0, x ^= x);
-  assertEquals(0, x <<= x);
-  assertEquals(0, x >>>= (x%((((((tmp = -107458601, tmp)>>(x*((x|((tmp = 2117286494, tmp)>>((x^(tmp = 114214295.42048478, tmp))>>>(tmp = 1032826615, tmp))))&((x*x)&(-225386977.67686415)))))^((-780566702.5911419)+(-1113319771)))|(((x^x)<<(1288064444))>>(-2292704291.619477)))>>(365125945))-((tmp = -1986270727.235776, tmp)/x))));
-  assertEquals(-0, x *= (((-18925517.67125845)|((((-1975220517)+(tmp = -1250070128.296064, tmp))+(1085931410.5895243))<<(((x|(((x*(tmp = 160207581.50536323, tmp))|(tmp = 1798744469.7958293, tmp))-x))>>>(((x+((x%x)&((((x^x)<<((tmp = 2538012074.623554, tmp)^x))*x)&x)))/(x+(tmp = -2563837407, tmp)))/(tmp = 2189564730, tmp)))/(((-1703793330.5770798)<<((176432492)|x))<<(1347017755.345185)))))<<(((tmp = -577100582.7258489, tmp)&x)/(-31246973))));
-  assertEquals(0, x >>>= x);
-  assertEquals(NaN, x %= ((x*(tmp = 1167625971, tmp))&(((tmp = -770445060, tmp)>>((339248786)^((2058689781.2387645)-((-2381162024)*(660448066)))))&x)));
-  assertEquals(NaN, x += ((3088519732.515986)-(-267270786.06493092)));
-  assertEquals(0, x &= (tmp = 2748768426.3393354, tmp));
-  assertEquals(-1109969306, x ^= ((-1109969306)>>>x));
-  assertEquals(-1109969306, x %= (tmp = 1150376563.581773, tmp));
-  assertEquals(-2058145178, x &= (-2057586057));
-  assertEquals(-850185626, x |= ((x^(tmp = 1223093422, tmp))&((-589909669)<<(2299786170))));
-  assertEquals(1489215443, x += (2339401069));
-  assertEquals(-23592960, x <<= x);
-  assertEquals(2063937322, x ^= (-2053296342.2317986));
-  assertEquals(12922122, x %= (x^((-2259987830)>>(x*(((tmp = -799867804.7716949, tmp)&(tmp = -1068744142, tmp))*(((((1091932754.8596292)-((tmp = -1778727010, tmp)>>(((tmp = 1207737073.2689717, tmp)-(x-(tmp = -1191958946, tmp)))+(-631801383.7488799))))-(-618332177))>>>(-156558558))>>>(3032101547.6262517)))))));
-  assertEquals(12922122, x &= x);
-  assertEquals(Infinity, x /= (x%x));
-  assertEquals(0, x &= (x*(-227800722.62070823)));
-  assertEquals(-865648691, x ^= (-865648691));
-  assertEquals(1, x /= (x%(tmp = 1524739353.8907173, tmp)));
-  assertEquals(16, x <<= (x<<(2335214658.789205)));
-  assertEquals(0, x &= ((tmp = 570332368.1239192, tmp)^(-2278439501)));
-  assertEquals(1881145344, x -= (((-569715735.8853142)+(2093355159))<<(tmp = 2788920949, tmp)));
-  assertEquals(0, x ^= x);
-  assertEquals(NaN, x -= ((tmp = -1427789954, tmp)%((((((411038329.49866784)-x)-(x<<((-1330832247)+x)))/x)^((x*(845763550.2134092))>>(tmp = 1427987604.5938706, tmp)))>>>(1857667535))));
-  assertEquals(NaN, x /= (-313793473));
-  assertEquals(0, x >>>= (x/x));
-  assertEquals(1869358566, x -= (-1869358566));
-  assertEquals(-1901664519209545200, x += ((tmp = 944729941.3936644, tmp)*(-2012918653)));
-  assertEquals(-1901664519209545200, x += ((tmp = 1348246793, tmp)/(x&x)));
-  assertEquals(-1576791552, x &= (tmp = 2719250966.739456, tmp));
-  assertEquals(-305087899, x ^= (-2955630491.030272));
-  assertEquals(0, x ^= (x%(1575252839.559443)));
-  assertEquals(4184604407, x += ((((tmp = -244720076.17657042, tmp)|(2819320515))^((((tmp = 1222623743.9184055, tmp)*(-95662379.577173))/(x/(x+(((x-(tmp = -3024718107.6310973, tmp))^(-1494390781))&(tmp = 2284054218.8323536, tmp)))))>>>(tmp = 2090069761, tmp)))>>>(x%x)));
-  assertEquals(3148907440, x -= (((tmp = -332379100.7695112, tmp)-(-1145399547))^(((((((tmp = 3133792677.785844, tmp)+x)<<(2306999139.5799255))>>((tmp = -2051266106, tmp)*(((((x+(((-728654312.8954825)>>(x>>>(((x%x)&(-1587152364))|(((((-2114138294)&x)&(1547554688))^x)-(-1856094268)))))*(((-1135018784)&((x+(tmp = -1444020289, tmp))|x))+x)))>>x)&x)/(2449005489))<<((131073798.64314616)%(x>>>((-2592101383.2205048)^(tmp = -757096673.0381112, tmp)))))))^(2766467316.8307915))-(-2465892914.515834))-((((tmp = 234064056, tmp)^((x>>>(1622627548.7944543))+(-1750474146)))|(-1959662039.4687617))^((-1222880974)&(-2794536175.906498))))));
-  assertEquals(-1157627488, x &= (-1156639323));
-  assertEquals(-1342170624, x <<= ((x/((((1829945345.0613894)/(x*((tmp = 1278865203.0854595, tmp)/(((tmp = -2298274086.519347, tmp)+(tmp = -545203761, tmp))-(tmp = 2712195820, tmp)))))>>>((tmp = 240870798.9384452, tmp)-(tmp = -3188865300.4768195, tmp)))>>>(x%((648799266)>>>(tmp = 24460403.864815235, tmp)))))|((tmp = 232533924, tmp)|x)));
-  assertEquals(-2684341248, x += x);
-  assertEquals(1073755136, x &= (((-662718514.9245079)>>(tmp = -1915462105, tmp))+(tmp = 1478850441.8689613, tmp)));
-  assertEquals(-1073755136, x /= (x|((tmp = -1767915185, tmp)|((325827419.1430224)|(((-1343423676)|(tmp = -1929549501, tmp))|(-866933068.9585254))))));
-  assertEquals(-1073755136, x %= ((tmp = 547342356, tmp)-((tmp = 2213249646.7047653, tmp)-((((((-2463314705)^(tmp = -993331620, tmp))^(((x%x)>>(tmp = 1798026491.3658786, tmp))-(((1024072781)/(tmp = -2407354455, tmp))%(1973295010))))<<(-1966787233))^x)|(-1787730004)))));
-  assertEquals(-1073754452, x |= (tmp = 3099823788.077907, tmp));
-  assertEquals(-1540683096, x &= (-1540674632.7013893));
-  assertEquals(-1540683052, x ^= ((tmp = -126183090, tmp)>>>((-622437575.5788481)|((((tmp = -2947914022, tmp)%(((tmp = 2512586745, tmp)>>x)>>>((27238232.23677671)/(tmp = 3203958551, tmp))))/(tmp = 2906005721.402535, tmp))^((((tmp = 1763897860.737334, tmp)^(1445562340.2485332))/x)+(-2393501217.716533))))));
-  assertEquals(-1258599433, x |= (tmp = 351291767.59661686, tmp));
-  assertEquals(-1241560065, x |= (626346046.5083935));
-  assertEquals(-1241560065, x ^= ((2263372092)/((tmp = -2868907862, tmp)>>>x)));
-  assertEquals(-893685228, x -= (tmp = -347874837, tmp));
-  assertEquals(3401282068, x >>>= (x*x));
-  assertEquals(0, x %= x);
-  assertEquals(0, x >>>= x);
-  assertEquals(-2079237393, x ^= (tmp = 2215729903, tmp));
-  assertEquals(NaN, x %= ((((tmp = 3203450436, tmp)/(2867575150.6528325))&(1864945829))&((x&((((tmp = -1927086741.3438427, tmp)|x)|(-1783290909.3240588))*((-1074778499.0697656)*(x-((tmp = -848983542.8456669, tmp)^(tmp = -1324673961, tmp))))))>>(tmp = -2144580304.245896, tmp))));
-  assertEquals(-43334009, x |= (x^(-43334009.72683525)));
-  assertEquals(-43334009, x &= x);
-  assertEquals(-43334009, x %= (tmp = 1252450645.060542, tmp));
-  assertEquals(-43334009, x |= (((((((tmp = 968062202, tmp)/(x|(tmp = 2766801984, tmp)))*((2173353793.938968)>>(((tmp = -2459317247, tmp)<<(tmp = -2333601397, tmp))>>>((tmp = -578254251.8969193, tmp)*(tmp = 839964110.7893236, tmp)))))&(((1675305119)&(tmp = -929153707, tmp))*((x*x)*x)))/x)|(x/(tmp = 384740559.43867135, tmp)))%(1657362591)));
-  assertEquals(0, x -= x);
-  assertEquals(0, x %= (-1334758781.1087842));
-  assertEquals(0, x -= x);
-  assertEquals(-54, x += ((tmp = -1787151355.470972, tmp)>>((tmp = 237028977, tmp)>>(((2829473542)<<(x>>>(((((((x-(-1950724753))*(((x>>>(2807353513.6283565))<<((-583810779.1155353)>>(x*x)))>>(-1068513265)))^(x^(-696263908.5131407)))%(((tmp = -1325619399, tmp)<<((tmp = -1030194450, tmp)-x))^x))+((-2852768585.3718724)>>(tmp = -3160022361, tmp)))%(x&x))>>(tmp = 2667222702.5454206, tmp))))+((804998368.8915854)<<x)))));
-  assertEquals(-54, x %= (-1601267268.4306633));
-  assertEquals(1, x >>>= (tmp = -543199585.579128, tmp));
-  assertEquals(4.732914708226396e-10, x /= (tmp = 2112862922, tmp));
-  assertEquals(-4266932650, x -= ((((x^((((tmp = 2784618443, tmp)^(tmp = -2271260297.9010153, tmp))|((((tmp = -599752639.7516592, tmp)*(2751967680.3680997))^(tmp = -1478450055.578217, tmp))*x))-x))&((tmp = -520061982, tmp)-((tmp = 1400176711.9637299, tmp)^(((2100417541)|(x+(tmp = -674592897.0420957, tmp)))>>x))))^(tmp = -365650686.7947228, tmp))>>>((-2943521813)&(((tmp = -1888789582, tmp)>>(tmp = 700459655.488978, tmp))+(tmp = -1725725703.655931, tmp)))));
-  assertEquals(224277168, x <<= (tmp = 2885115011.8229475, tmp));
-  assertEquals(224277168, x %= (tmp = -2655345206.442777, tmp));
-  assertEquals(850395136, x <<= (x-(((((-769868538.1729524)/((tmp = -298603579, tmp)%(x^x)))+((2691475692)|(((x>>>(628995710.4745524))^(x<<(((tmp = -1046054749, tmp)|(919868171))-x)))^((-1377678789.8170452)&((3065147797)%(tmp = 2638804433, tmp))))))^(tmp = -2036295169, tmp))&(((tmp = -157844758.08476114, tmp)*(tmp = -2819601496, tmp))&((((tmp = 78921441, tmp)<<(653551762.5197772))/(1801316098))*(-1479268961.8276927))))));
-  assertEquals(1645565728, x ^= (tmp = 1353013024, tmp));
-  assertEquals(1645565728, x >>>= x);
-  assertEquals(3020513544, x += (1374947816));
-  assertEquals(0, x %= x);
-  assertEquals(0, x %= ((((((tmp = -304228072.4115715, tmp)>>>((-90523260.45975709)-(tmp = -3013349171.084838, tmp)))%((-1640997281)*((tmp = -1600634553, tmp)%((tmp = 557387864, tmp)<<((888796080.766409)|(x^((((x%(((((tmp = 1164377954.1041703, tmp)*x)|(2742407432.192806))&((tmp = 1707928950, tmp)<<(1279554132.4481683)))+(tmp = -2108725405.7752397, tmp)))%(tmp = -465060827, tmp))^((tmp = 2422773793, tmp)+x))^((((((((tmp = -1755376249, tmp)^((-267446806)^x))/(((tmp = -1808578662.4939392, tmp)+((tmp = -1997100217, tmp)+x))+(((tmp = -2469853122.411479, tmp)/x)>>(tmp = 660624616.7956645, tmp))))%((x<<((((((tmp = -1701946558, tmp)-(tmp = 133302235, tmp))>>>x)/(738231394))<<(-1060468151.4959564))&(((((-1877380837.4678264)|(tmp = 2366186363, tmp))%x)>>>(-2382914822.1745577))>>((-1874291848.9775913)<<(tmp = 2522973186, tmp)))))<<(-2672141993)))|(tmp = 732379966, tmp))%x)^x)^x))))))))%(tmp = 2385998902.7287374, tmp))*x)+(tmp = -2195749866.017106, tmp)));
-  assertEquals(401488, x ^= (((-320896627)>>>(tmp = 2812780333.9572906, tmp))&(tmp = -2088849328, tmp)));
-  assertEquals(-1661116571.0046256, x += (tmp = -1661518059.0046256, tmp));
-  assertEquals(-1616122720, x <<= x);
-  assertEquals(-1616122720, x >>= x);
-  assertEquals(-390439413, x %= (tmp = -1225683307, tmp));
-  assertEquals(-84189205, x |= ((x|(2054757858))^(((x<<(((x|x)|(((x>>>((-2938303938.1397676)<<((2993545056)^((tmp = -643895708.5427527, tmp)/((1371449825.5345795)-(1896270238.695752))))))-(tmp = 1061837650, tmp))+(x+(tmp = 3072396681, tmp))))>>(x-((((tmp = -1877865355.1550744, tmp)&x)%(-2766344937))>>>(2055121782)))))-((x<<x)|(tmp = -2742351880.1974454, tmp)))<<((-2600270279.219802)>>(-1625612979)))));
-  assertEquals(-168378410, x += x);
-  assertEquals(-168378410, x &= x);
-  assertEquals(-1534983792, x &= (-1501412943));
-  assertEquals(-1821543761, x ^= (938439487));
-  assertEquals(-1821543761, x &= (x^(((tmp = -4237854, tmp)>>x)/x)));
-  assertEquals(2358, x >>>= (2954252724.620632));
-  assertEquals(4716, x <<= ((-75522382.8757689)/((tmp = 1074334479, tmp)|((tmp = -720387522, tmp)>>(x>>>(-3085295162.6877327))))));
-  assertEquals(-1313079316, x |= (2981887904.020387));
-  assertEquals(-1957790646, x -= (644711330));
-  assertEquals(17831, x >>>= ((tmp = -2550108342, tmp)-(((tmp = 454671414.0146706, tmp)+(-661129693.9333956))>>(x>>>(((tmp = 1752959432.3473055, tmp)*(-2619510342.1812334))%(tmp = -456773274.2411971, tmp))))));
-  assertEquals(689287937.6879716, x -= ((tmp = -397126863.6879716, tmp)-(((x>>x)^(x/(-1387467129.6278908)))|((x>>((tmp = -2361114214.8413954, tmp)<<(tmp = -805670024.4717407, tmp)))<<(-2724018098)))));
-  assertEquals(1378575875.3759432, x += x);
-  assertEquals(84112428460187.8, x *= (((((2681425112.3513584)%(tmp = -1757945333, tmp))|x)>>(-1793353713.0003397))%x));
-  assertEquals(-3221, x >>= (-1976874128));
-  assertEquals(-3221, x %= (((tmp = 2318583056.834932, tmp)|((tmp = -1016115125, tmp)+((-472566636.32567954)+x)))|(tmp = 3135899138.065598, tmp)));
-  assertEquals(-6596608, x <<= x);
-  assertEquals(-1249902592, x <<= (((tmp = -2025951709.5051148, tmp)/((-465639441)<<(-2273423897.9682302)))*((tmp = -2408892408.0294642, tmp)-(tmp = 1017739741, tmp))));
-  assertEquals(73802092170444800, x *= (tmp = -59046275, tmp));
-  assertEquals(-1619001344, x <<= x);
-  assertEquals(0, x <<= (tmp = 1610670303, tmp));
-  assertEquals(-0, x *= ((((x+(tmp = 2039867675, tmp))|(tmp = 399355061, tmp))<<(1552355369.313559))^x));
-  assertEquals(0, x *= x);
-  assertEquals(0, x >>>= (((2875576018.0610805)>>x)%(tmp = -2600467554, tmp)));
-  assertEquals(2290405226.139538, x -= (-2290405226.139538));
-  assertEquals(0, x %= x);
-  assertEquals(0, x ^= (((tmp = 2542309844.485515, tmp)-x)%((-2950029429.0027323)/(tmp = 2943628481, tmp))));
-  assertEquals(0, x += x);
-  assertEquals(0, x -= x);
-  assertEquals(0, x >>>= (tmp = 2337330038, tmp));
-  assertEquals(0, x += (x/(((292272669.0808271)&(tmp = 2923699026.224247, tmp))^(tmp = 367745855, tmp))));
-  assertEquals(0, x &= x);
-  assertEquals(0, x %= ((tmp = 1565155613.3644123, tmp)<<(-308403859.5844681)));
-  assertEquals(-1845345399.3731332, x += (tmp = -1845345399.3731332, tmp));
-  assertEquals(5158590659731951000, x *= (-2795460763.8680177));
-  assertEquals(-364664, x >>= (1837745292.5701954));
-  assertEquals(1, x /= x);
-  assertEquals(-860616114.8182092, x += ((tmp = 2076961323.1817908, tmp)+(-2937577439)));
-  assertEquals(-860616115, x ^= ((x*(tmp = 2841422442.583121, tmp))>>>((tmp = 1929082917.9039137, tmp)>>(-2602087246.7521305))));
-  assertEquals(-38387843, x |= (3114677624));
-  assertEquals(2927507837, x += (tmp = 2965895680, tmp));
-  assertEquals(1, x /= x);
-  assertEquals(-1792887531, x *= (-1792887531));
-  assertEquals(-0, x %= ((x^x)+x));
-  assertEquals(-0, x %= (tmp = 2800752702.562547, tmp));
-  assertEquals(1384510548, x ^= (tmp = 1384510548, tmp));
-  assertEquals(42251, x >>= (1645421551.363844));
-  assertEquals(0, x >>>= (17537561));
-  assertEquals(-2076742862, x ^= (tmp = 2218224434, tmp));
-  assertEquals(-2.790313825067623, x /= (744268563.3934636));
-  assertEquals(5313538, x &= (((((tmp = -2406579239.0691676, tmp)+((-1470174628)+(((tmp = -783981599, tmp)<<(tmp = -1789801141.272646, tmp))^(((((((tmp = -844643189.5616491, tmp)&(tmp = -252337862, tmp))&(x|x))%((-3159642145.7728815)+(tmp = 2149920003.9525595, tmp)))&(x>>(1737589807.9431858)))-((((((((1610161800)<<(497024994))>>x)<<x)/x)>>>x)&x)-(757420763.2141517)))-(tmp = -3061016994.9596977, tmp)))))/(tmp = 1810041920.4089384, tmp))&(tmp = 5887654.786785364, tmp))&((tmp = 1626414403.2432103, tmp)+(x%x))));
-  assertEquals(-2147483648, x <<= (tmp = 1304102366.8011155, tmp));
-  assertEquals(-208418816, x %= (((((-2850404799)*(x+(3158771063.226051)))*(-2017465205))/(x>>x))>>(x%(tmp = 2760203322, tmp))));
-  assertEquals(-2189223477, x -= (1980804661));
-  assertEquals(-859239912, x ^= (tmp = 2974421971.3544703, tmp));
-  assertEquals(-1599850415, x ^= (tmp = -2475871671.140151, tmp));
-  assertEquals(-1600636847, x += ((((tmp = -1311002944, tmp)<<((tmp = -1137871342, tmp)<<(tmp = 115719116, tmp)))/(413107255.6242596))<<(x>>((((-1908022173)&(((-1519897333)^((x>>(x*(tmp = -2886087774.426503, tmp)))*(tmp = 530910975, tmp)))+(-2579617265.889692)))+((2518127437.127563)>>>((tmp = 481642471.56441486, tmp)>>>(792447239))))^(x<<(248857393.6819017))))));
-  assertEquals(-191, x >>= (-1591265193));
-  assertEquals(-192.27421813247196, x += ((tmp = 2627329028.207775, tmp)/(tmp = -2061914644.9523563, tmp)));
-  assertEquals(1230613220, x ^= (tmp = 3064354212.307105, tmp));
-  assertEquals(1230613220, x &= x);
-  assertEquals(1230613220, x %= (1833479205.1064768));
-  assertEquals(1230613220, x >>>= ((((1559450742.1425748)|((2151905260.956583)*(1213275165)))%(514723483.12764716))>>>x));
-  assertEquals(1230613493, x |= ((((3004939197.578903)*(tmp = -576274956, tmp))+((tmp = 1037832416.2243971, tmp)^x))>>>(tmp = 2273969109.7735467, tmp)));
-  assertEquals(2461226986, x += x);
-  assertEquals(-27981, x >>= ((692831755.8048055)^((tmp = -1593598757, tmp)%(x-((((-1470536513.882593)|((tmp = -2716394020.466401, tmp)|(tmp = 2399097686, tmp)))&x)%x)))));
-  assertEquals(-1.4660454948034359e+23, x *= (((x>>>((((((tmp = -3056016696, tmp)<<(-2882888332))*(2041143608.321916))&(((tmp = -634710040, tmp)|(tmp = -2559412457, tmp))>>(1916553549.7552106)))%((-2150969350.3643866)*x))<<((x*(tmp = 2657960438.247278, tmp))|x)))%((tmp = 526041379, tmp)*(tmp = 2514771352.4509397, tmp)))*(1219908294.8107886)));
-  assertEquals(-1.4660454948034359e+23, x -= ((1709004428)>>(((x|(-422745730.626189))%x)>>x)));
-  assertEquals(-2247766068, x %= (-3105435508));
-  assertEquals(-386845856.0649812, x -= (-1860920211.9350188));
-  assertEquals(-386846803.0649812, x -= ((((-3214465921)|((tmp = -1326329034, tmp)+(((tmp = -1203188938.9833462, tmp)%((((((-1318276502)+(x+x))^((x<<x)%(x>>>x)))+(tmp = -439689881, tmp))+((-1455448168.695214)^(x-((-388589993)>>((((940252202)^(-2218777278))|x)/(tmp = -1007511556, tmp))))))&(-140407706.28176737)))-(x/((888903270.7746506)-((tmp = -2885938478.632409, tmp)<<(((((tmp = -1750518830.270917, tmp)>>(((((((tmp = 868557365.7908674, tmp)/(tmp = -2805687195.5172157, tmp))*x)|((((((-1342484550)-((tmp = 1089284576, tmp)^(tmp = 120651272, tmp)))<<(tmp = 2230578669.4642825, tmp))-(x*x))%(x^(((tmp = -3177941534, tmp)+(x>>(-1595660968)))/(-1738933247))))>>>(tmp = 2860175623, tmp)))-(((2392690115.8475947)>>>(tmp = -1754609670.2068992, tmp))>>>(tmp = 2615573062, tmp)))-(tmp = 2590387730, tmp))^((x+((((x-(tmp = -2823664112.4548965, tmp))*(200070977))>>>(((x|((((tmp = 1361398, tmp)>>((tmp = 1649209268, tmp)%x))+x)+(x>>>(tmp = -2379989262.1245675, tmp))))|(x^((tmp = -647953298.7526417, tmp)-x)))&(tmp = -1881232501.1945808, tmp)))>>>x))%(x^(tmp = -1737853471.005935, tmp)))))>>>(427363558))>>>((tmp = -3076726422.0846386, tmp)^(-1518782569.1853383)))/x)))))))|x)>>>(1854299126)));
-  assertEquals(-386846803.0649812, x -= (x%x));
-  assertEquals(238532, x >>>= (-448890706.10774803));
-  assertEquals(232, x >>>= (-791593878));
-  assertEquals(232, x <<= (((x^((x-x)&(tmp = 1219114201, tmp)))/(tmp = -427332955, tmp))%(tmp = 1076283154, tmp)));
-  assertEquals(210, x ^= (x>>>((2975097430)>>>x)));
-  assertEquals(1, x /= x);
-  assertEquals(2317899531, x *= (2317899531));
-  assertEquals(1131786, x >>>= x);
-  assertEquals(2301667519.6379366, x += ((tmp = 193109669.63793683, tmp)+(tmp = 2107426064, tmp)));
-  assertEquals(3842614963.6379366, x += (((-1676516834)>>>(tmp = -1817478916.5658965, tmp))^(((tmp = 1122659711, tmp)>>>(tmp = -2190796437, tmp))|(tmp = -2754023244, tmp))));
-  assertEquals(-452352333, x &= x);
-  assertEquals(-863, x >>= x);
-  assertEquals(-3.777863669459606e-7, x /= (2284359827.424491));
-  assertEquals(-3.777863669459606e-7, x %= ((tmp = -2509759238, tmp)>>>x));
-  assertEquals(0, x <<= (-814314066.6614306));
-  assertEquals(0, x %= (tmp = 190720260, tmp));
-  assertEquals(2301702913, x += (2301702913));
-  assertEquals(-249158048, x >>= (tmp = -2392013853.302008, tmp));
-  assertEquals(-249158048, x >>= x);
-  assertEquals(-498316096, x += x);
-  assertEquals(-498316096, x %= (tmp = 2981330372.914731, tmp));
-  assertEquals(106616.2199211318, x *= (((((tmp = 1020104482.2766557, tmp)^((tmp = -416114189.96786, tmp)>>>(1844055704)))|(tmp = 1665418123, tmp))>>(1826111980.6564898))/(-2446724367)));
-  assertEquals(106616, x |= x);
-  assertEquals(1094927345, x -= (((-1229759420)|(741260479.7854375))-x));
-  assertEquals(8353, x >>= x);
-  assertEquals(0, x >>>= (tmp = -327942828, tmp));
-  assertEquals(-953397616.8888416, x += (tmp = -953397616.8888416, tmp));
-  assertEquals(-1906641240.7776833, x += (x+((-3033450184.9106326)>>>(tmp = 2090901325.5617187, tmp))));
-  assertEquals(-1906641240.7776833, x %= (tmp = 2584965124.3953505, tmp));
-  assertEquals(-1098907671, x |= (tmp = -1272590495, tmp));
-  assertEquals(-1.8305258600334393, x /= (600323489));
-  assertEquals(-1, x &= x);
-  assertEquals(-1, x |= ((x+x)-x));
-  assertEquals(1, x *= x);
-  assertEquals(867473898, x ^= (tmp = 867473899.0274491, tmp));
-  assertEquals(6, x >>>= (tmp = 1174763611.341228, tmp));
-  assertEquals(0, x >>= ((689882795)^(2250084531)));
-  assertEquals(0, x /= (tmp = 2545625607, tmp));
-  assertEquals(0, x >>= x);
-  assertEquals(0, x += x);
-  assertEquals(0, x -= (x*(-1098372339.5157008)));
-  assertEquals(NaN, x %= x);
-  assertEquals(NaN, x -= (tmp = -1797344676.375759, tmp));
-  assertEquals(1121476698, x |= (tmp = 1121476698, tmp));
-  assertEquals(1, x /= x);
-  assertEquals(1, x &= (-191233693));
-  assertEquals(330137888.92595553, x += (330137887.92595553));
-  assertEquals(-1792236714, x ^= (tmp = 2256609910, tmp));
-  assertEquals(269000724, x &= (316405813.62093115));
-  assertEquals(256, x >>= x);
-  assertEquals(256, x %= ((2556320341.54669)|(1066176021.2344948)));
-  assertEquals(256, x |= x);
-  assertEquals(131072, x <<= ((-1650561175.8467631)|x));
-  assertEquals(-286761951, x -= ((tmp = 287024095, tmp)-((-2293511421)&(x|x))));
-  assertEquals(-1561852927, x &= (3002663949.0989227));
-  assertEquals(-460778761, x %= (tmp = -550537083, tmp));
-  assertEquals(-3023749308.0492287, x += (tmp = -2562970547.0492287, tmp));
-  assertEquals(-481313332.04922867, x %= ((x|((tmp = -855929299, tmp)%((2181641323)%(x|(220607471.33018696)))))&x));
-  assertEquals(17510668, x &= (tmp = 363557663, tmp));
-  assertEquals(12552, x &= (3020225307));
-  assertEquals(1814655896, x |= ((x<<(((-1475967464)*(-3122830185))*x))+(x^(-2480340864.2661023))));
-  assertEquals(-3209124403525266400, x -= ((1146847590)*(tmp = 2798213497, tmp)));
-  assertEquals(-6418248807050533000, x += x);
-  assertEquals(1.1856589432073933e+28, x *= (-1847324681.313275));
-  assertEquals(-1238853292, x ^= (-1238853292));
-  assertEquals(-77428331, x >>= (x&((((2043976651.8514216)>>>x)^(x>>>(((tmp = -1785122464.9720652, tmp)%x)<<(1570073474.271266))))*x)));
-  assertEquals(2011, x >>>= x);
-  assertEquals(2011, x &= x);
-  assertEquals(0, x >>= (-2682377538));
-  assertEquals(-1.1367252770299785, x -= (((tmp = 2704334195.566802, tmp)/(2379056972))%((((-1764065164)*((((468315142.8822602)>>((x%(((tmp = 2537190513.506641, tmp)+((x&(x|((tmp = -947458639, tmp)^(2653736677.417406))))*((x<<((1243371170.1759553)>>>(((tmp = 1572208816, tmp)<<((tmp = 963855806.1090456, tmp)>>>x))%((-3078281718.7743487)*x))))^(-1154518374))))^(-2839738226.6314087)))^((-2865141241.190915)*(-2400659423.8207664))))>>((tmp = 32940590, tmp)/(tmp = 2917024064.570817, tmp)))+(((27601850)/(tmp = 3168834986, tmp))>>x)))+(tmp = 2528181032.600125, tmp))/(3162473952))));
-  assertEquals(-1697395408.7948515, x -= (1697395407.6581264));
-  assertEquals(1536992607912062500, x *= (tmp = -905500627.5781817, tmp));
-  assertEquals(102759872, x >>= (tmp = -707887133.4484048, tmp));
-  assertEquals(102759872, x %= (tmp = -1764067619.7913327, tmp));
-  assertEquals(12543, x >>>= (-144142995.1469829));
-  assertEquals(-2059555229.2592103, x += ((-2059555229.2592103)-x));
-  assertEquals(-537022593, x |= (tmp = -2770761410.407701, tmp));
-  assertEquals(23777505, x ^= (-560496738.6854918));
-  assertEquals(-64329014115772310, x *= ((tmp = -2729234369.198843, tmp)+x));
-  assertEquals(189083830, x ^= (tmp = 933619934, tmp));
-  assertEquals(189083830, x %= ((tmp = -2918083254, tmp)-(x|(x^(-2481479224.0329475)))));
-  assertEquals(378167660, x += x);
-  assertEquals(-0.45833387791900504, x /= ((tmp = 2727991875.241294, tmp)<<(tmp = 2570034571.9084663, tmp)));
-  assertEquals(0, x <<= x);
-  assertEquals(-0, x /= (tmp = -67528553.30662966, tmp));
-  assertEquals(0, x <<= (938440044.3983492));
-  assertEquals(-945479171, x ^= (tmp = -945479171, tmp));
-  assertEquals(-225632619284361200, x *= (238643670.00884593));
-  assertEquals(-0, x %= x);
-  assertEquals(-585826304, x ^= ((-1256265560)<<(tmp = 1144713549, tmp)));
-  assertEquals(-671583855, x ^= (183333265.1468178));
-  assertEquals(-484311040, x <<= x);
-  assertEquals(-3969762.62295082, x /= ((((tmp = -1164308668.931008, tmp)-x)%x)>>>(((397816647)>>(-1605343671.4070785))<<x)));
-  assertEquals(758097879, x ^= ((tmp = -2871307491, tmp)^(-2043176492.646442)));
-  assertEquals(0, x *= ((x>>(tmp = 1983292927, tmp))&(tmp = -860505131.4484091, tmp)));
-  assertEquals(0, x <<= x);
-  assertEquals(0, x &= x);
-  assertEquals(0, x %= ((3132981707)-(-2832016477)));
-  assertEquals(0, x >>= (x<<((1830195133.0342631)>>>(tmp = -1003969250, tmp))));
-  assertEquals(NaN, x %= x);
-  assertEquals(NaN, x += (tmp = 273271019.87603223, tmp));
-  assertEquals(NaN, x += (625749326.1155348));
-  assertEquals(0, x >>= (tmp = -531039433.3702333, tmp));
-  assertEquals(0, x -= (((tmp = 2029464099, tmp)-(x-(tmp = -329058111.411458, tmp)))*(x<<x)));
-  assertEquals(-0, x *= ((-1112957170.5613296)|((tmp = 847344494, tmp)>>>(tmp = 2735119927, tmp))));
-  assertEquals(-0, x /= (tmp = 544636506, tmp));
-  assertEquals(0, x >>>= (x^(545093699)));
-  assertEquals(0, x %= (((tmp = -2208409647.5052004, tmp)+(3083455385.374988))+(((-482178732.7077277)*x)>>>((2661060565)*(-2125201239)))));
-  assertEquals(0, x >>>= (-212334007.34016395));
-  assertEquals(0.7004300865203454, x -= ((2032883941)/(-2902336693.0154715)));
-  assertEquals(0, x <<= (x<<((265868133.50175047)>>>(1162631094))));
-  assertEquals(604920272.4394834, x -= (-604920272.4394834));
-  assertEquals(604920272, x &= x);
-  assertEquals(0, x <<= (((-1961880051.1127694)%(tmp = 1715021796, tmp))|((tmp = 2474759639.4587016, tmp)|(243416152.55635))));
-  assertEquals(-46419074, x |= (((tmp = -518945938.5238774, tmp)%((x+(tmp = 242636408, tmp))+(-1974062910)))|(1546269242.0259726)));
-  assertEquals(-46419074, x += ((-629802130)*((tmp = -658144149, tmp)%((-905005358.5370393)>>>x))));
-  assertEquals(-46419074, x |= (x%(-1103652494)));
-  assertEquals(7892881050983985, x *= (-170035297.36469936));
-  assertEquals(1105701997.4273424, x %= ((((-490612260.0023911)>>>(tmp = 1803426906, tmp))^(x%(2725270344.2568116)))-(1010563167.8934317)));
-  assertEquals(1088619532, x &= (-2232199650));
-  assertEquals(1073807364, x &= (-888024506.5008001));
-  assertEquals(1153062254980628500, x *= x);
-  assertEquals(1153062255703627000, x -= (tmp = -722998613.897227, tmp));
-  assertEquals(-1141418584, x |= (3017232552.4814596));
-  assertEquals(-373464140, x ^= (-2914372068));
-  assertEquals(994050048, x <<= x);
-  assertEquals(0, x ^= x);
-  assertEquals(0, x &= (tmp = -3166402389, tmp));
-  assertEquals(0, x &= ((-1760842506.337213)|(tmp = 2538748127.795164, tmp)));
-  assertEquals(-0, x /= (-2635127769.808626));
-  assertEquals(0, x &= ((((tmp = 1414701581, tmp)^(((2425608769)/((x<<x)^(x-x)))^((tmp = -2641946468.737288, tmp)|(tmp = -313564549.1754241, tmp))))*(tmp = -2126027460, tmp))|(-2255015479)));
-  assertEquals(225482894, x ^= (225482894.8767246));
-  assertEquals(0, x ^= x);
-  assertEquals(306216231, x += (tmp = 306216231, tmp));
-  assertEquals(306216231, x -= ((-465875275.19848967)&((-806775661.4260025)/((((-184966089.49763203)>>>((x>>x)+((tmp = -1951107532, tmp)|x)))%x)*((2704859526.4047284)%((x*x)>>x))))));
-  assertEquals(30754, x &= (1706162402.033193));
-  assertEquals(30454.010307602264, x -= (((590456519)>>>(tmp = 2713582726.8181214, tmp))/x));
-  assertEquals(8419062, x |= ((2848886788)<<(tmp = 2993383029.402275, tmp)));
-  assertEquals(16, x >>= (tmp = -1651287021, tmp));
-  assertEquals(1, x /= x);
-  assertEquals(-1407643485, x ^= (-1407643486));
-  assertEquals(2, x >>>= (-1126004674));
-  assertEquals(470812081, x ^= ((-2411718964)>>>x));
-  assertEquals(550443688.6407901, x += (tmp = 79631607.6407901, tmp));
-  assertEquals(3669092443.64079, x -= (-3118648755));
-  assertEquals(-625874853, x <<= (((tmp = -1640437346, tmp)/(((x*x)>>>x)<<x))/x));
-  assertEquals(-1431439050363516700, x *= (2287101077));
-  assertEquals(-1921660672, x |= ((((((((-1912249689.9978154)&(-1676922742.5343294))*(2625527768))<<((820676465)^(((x+(tmp = -852743692, tmp))&((x-((((1361714551)/(311531668))>>>(tmp = -1330495518.8175917, tmp))<<(((tmp = 1369938417.8760853, tmp)*(-1217947853.8942266))<<(-2048029668))))-(-513455284)))>>>(tmp = 1980267333.6201067, tmp))))<<(((1503464217.2901971)>>(tmp = 2258265389, tmp))>>>(1868451148)))&(x-(x^(tmp = -1565209787, tmp))))*x)<<(tmp = -2426550685, tmp)));
-  assertEquals(-1921660672, x %= (((tmp = 523950472.3315773, tmp)+(((2971865706)^x)-x))&(-1773969177)));
-  assertEquals(420176973.1169958, x += (2341837645.116996));
-  assertEquals(420176973, x >>>= (((tmp = -2485489141, tmp)<<((tmp = -2520928568.360244, tmp)+x))&(543950045.0932506)));
-  assertEquals(50, x ^= (x|((tmp = 2001660699.5898843, tmp)>>>(tmp = 1209151128, tmp))));
-  assertEquals(138212770720.96973, x *= (2764255414.4193945));
-  assertEquals(-28683, x |= (((-535647551)|x)>>((((2065261509)>>(-354214733))*x)+(-3218217378.2592907))));
-  assertEquals(1627048838, x ^= (tmp = -1627044749, tmp));
-  assertEquals(-839408795, x ^= (2903337187.480303));
-  assertEquals(-1000652427, x += (tmp = -161243632, tmp));
-  assertEquals(740237908.4196916, x += ((tmp = 1587000348, tmp)+(tmp = 153889987.41969144, tmp)));
-  assertEquals(Infinity, x /= (((((-615607376.1012697)&(57343184.023578644))+((-1967741575)|(-3082318496)))<<(((tmp = -958212971.99792, tmp)>>(tmp = 2962656321.3519197, tmp))-(x|(x*(969365195)))))<<(tmp = -1739470562.344624, tmp)));
-  assertEquals(-Infinity, x /= ((tmp = -1736849852, tmp)%x));
-  assertEquals(0, x <<= x);
-  assertEquals(0, x %= (tmp = -226505646, tmp));
-  assertEquals(1982856549, x -= (((x+(-1982856549))%(-2274946222))>>(x%(((tmp = -1289577208.9097936, tmp)>>x)^(778147661)))));
-  assertEquals(1648018703, x ^= ((3085618856)+((tmp = 1546283467, tmp)&(((x|((-2376306530)*(((((((tmp = -2807616416, tmp)%(((((tmp = 347097983.1491085, tmp)<<x)|(((((1135380667)/(x>>>(tmp = 1679395106, tmp)))^((1277761947)<<((tmp = -1614841203.5244312, tmp)>>x)))%((tmp = 1552249234.2065845, tmp)>>>x))>>>(tmp = -1677859287, tmp)))>>>(2605907565))/(tmp = 2291657422.221277, tmp)))%(((tmp = 425501732.6666014, tmp)>>>(1327403879.455553))+x))>>((tmp = -3075752653.2474413, tmp)&(x-(tmp = -71834630, tmp))))|((((2532199449.6500597)*(-842197612.4577162))%x)>>x))*(((1220047194.5100307)<<((tmp = 1642962251, tmp)<<((-662340)>>>((tmp = -1672316631.3251066, tmp)<<((tmp = 1762690952.542441, tmp)-(x/(1904755683.3277364)))))))>>x))|(((((tmp = 1625817700.7052522, tmp)%(tmp = -2990984460, tmp))|(2395645662))-((2619930607.550086)>>x))^(tmp = 130618712, tmp)))))&((-3142462204.4628367)/(1078126534.8819227)))%(((tmp = -256343715.2267704, tmp)+x)^(tmp = 2009243755, tmp))))));
-  assertEquals(1937698223, x |= (((tmp = 866354374.7435778, tmp)+(tmp = 2751925259.3264275, tmp))%(-2252220455)));
-  assertEquals(0, x -= x);
-  assertEquals(-823946290.6515498, x -= (tmp = 823946290.6515498, tmp));
-  assertEquals(706970324, x ^= (-457174758));
-  assertEquals(32916, x &= (25740724));
-  assertEquals(0, x >>>= ((-1658933418.6445677)|(tmp = -846929510.4794133, tmp)));
-  assertEquals(0, x ^= ((-834208600)/((-1256752740)&(tmp = 1973248337.8973258, tmp))));
-  assertEquals(-1639195806, x += (-1639195806));
-  assertEquals(-1559416478, x ^= ((tmp = 1349893449.0193534, tmp)*(tmp = 2044785568.1713037, tmp)));
-  assertEquals(0, x &= ((x>>(tmp = 1720833612, tmp))/((x+(-1305879952.5854573))^x)));
-  assertEquals(-0, x *= (tmp = -1713182743, tmp));
-  assertEquals(0, x >>= x);
-  assertEquals(NaN, x /= (((x%((x>>>(((-1515761763.5499895)^(-3076528507.626539))<<(tmp = 1293944457.8983147, tmp)))<<(tmp = 276867491.8483894, tmp)))>>(tmp = -2831726496.6887417, tmp))%((((tmp = 1780632637.3666987, tmp)^x)%((208921173.18897665)>>(tmp = 633138136, tmp)))+x)));
-  assertEquals(0, x >>= (tmp = -2755513767.0561147, tmp));
-  assertEquals(0, x |= x);
-  assertEquals(840992300.0324914, x -= ((-840992300.0324914)+x));
-  assertEquals(840992300, x &= x);
-  assertEquals(-1094140277, x ^= (2364029095));
-  assertEquals(-Infinity, x /= ((((((1257084956)<<(2009241695))>>(x+x))*x)>>>x)>>>(205318919.85870552)));
-  assertEquals(-Infinity, x -= (((x>>>(tmp = 3037168809.20163, tmp))&x)*(x&(((806151109)*x)-(tmp = -1741679480.58333, tmp)))));
-  assertEquals(400659949, x ^= (tmp = 400659949, tmp));
-  assertEquals(5, x >>= (tmp = 1175519290, tmp));
-  assertEquals(5, x |= x);
-  assertEquals(0, x >>= x);
-  assertEquals(0, x >>= ((1317772443)&(x<<x)));
-  assertEquals(-1123981819, x ^= (tmp = 3170985477, tmp));
-  assertEquals(1123864651, x ^= ((x%(((x&x)&(-2606227299.7590737))<<((tmp = -2018123078.1859496, tmp)*x)))|(x+(((((1935939774.8139446)/((-1303958190)/(2802816697.32639)))<<((2880056582)*x))+x)+x))));
-  assertEquals(1543368927, x |= (-2795691884));
-  assertEquals(NaN, x /= (x%((tmp = -1129915114, tmp)<<x)));
-  assertEquals(NaN, x += (tmp = -3045743135, tmp));
-  assertEquals(NaN, x -= (tmp = -2849555731.8207827, tmp));
-  assertEquals(NaN, x /= (((((2127485827)>>>((((tmp = 363239924, tmp)>>x)|((((tmp = -1419142286.0523334, tmp)-(x<<x))^(tmp = -1990365089.8283136, tmp))*((tmp = 2780242444.0739098, tmp)>>>(((-2336511023.342298)&x)/(tmp = 2296926221.402897, tmp)))))>>((tmp = 1378982475.6839466, tmp)>>(tmp = -816522530, tmp))))&(x^(tmp = -1668642255.0586753, tmp)))%(((tmp = 921249300.1500335, tmp)^x)*(tmp = -2228816905, tmp)))>>x));
-  assertEquals(-1460685191, x |= (tmp = 2834282105, tmp));
-  assertEquals(-1463439264, x &= (tmp = 2881860064.146755, tmp));
-  assertEquals(20.98100714963762, x /= (((3017150580.7875347)^((250499372.5339837)<<(tmp = -42767556.30788112, tmp)))|(x%(-2829281526))));
-  assertEquals(1, x /= x);
-  assertEquals(2, x += x);
-  assertEquals(8, x <<= x);
-  assertEquals(0, x >>>= ((730174750)>>>x));
-  assertEquals(0, x ^= x);
-  assertEquals(-1459637373, x ^= (2835329923.456409));
-  assertEquals(-1233115861, x ^= (511678120));
-  assertEquals(95682857, x >>>= ((tmp = 1534570885, tmp)|(tmp = -414425499.3786578, tmp)));
-  assertEquals(70254633, x &= (-1502067585));
-  assertEquals(51384749748909710, x *= (tmp = 731407276, tmp));
-  assertEquals(9390482.873469353, x %= (tmp = -592576964.7982686, tmp));
-  assertEquals(4695241, x >>>= (tmp = -1879898431.5395758, tmp));
-  assertEquals(-3129811912538149000, x += (((-727481809)^((3106908604)%x))*((((tmp = -1218123690, tmp)^(x>>((-942923806)^x)))/(x+x))>>>(-1508881888.969373))));
-  assertEquals(1596870236, x ^= (-1135673764.9721224));
-  assertEquals(0, x ^= x);
-  assertEquals(2133782410, x |= (((-2202469371)>>((tmp = 1327588406.183342, tmp)/(tmp = 253581265.7246865, tmp)))-((tmp = 2226575446.838795, tmp)^x)));
-  assertEquals(-81895217.83608055, x -= (tmp = 2215677627.8360806, tmp));
-  assertEquals(812089344, x <<= ((tmp = 882824005, tmp)/(((x>>((((((((tmp = 1211145185, tmp)/((-137817273)-(((tmp = 2165480503.1144185, tmp)-(-1840859887.1288517))*((155886014.8393339)>>((-1984526598)<<(tmp = 1331249058.3246582, tmp))))))>>(x*x))%(2830324652))%(933701061))|(1346496215))^(tmp = -988800810, tmp))+x))>>>x)<<(-2372088384))));
-  assertEquals(812089344, x <<= x);
-  assertEquals(8472, x %= ((((x|(((x%(tmp = 2772099481.664402, tmp))+(2894690616))-x))&(x&(((-715790638.6454093)>>(tmp = -1447931029, tmp))-(tmp = 1761027889, tmp))))^x)%(((tmp = 830969811, tmp)|x)|((-1102267929)-(3193018687)))));
-  assertEquals(-0.0000028559857417864914, x /= (-2966401364));
-  assertEquals(0, x >>= x);
-  assertEquals(-701800392, x += (tmp = -701800392, tmp));
-  assertEquals(2034756873, x -= (tmp = -2736557265, tmp));
-  assertEquals(-0.9475075048394501, x /= (((((82879340.27231383)+((tmp = -2876678920.653639, tmp)*(-2801097850)))<<x)>>>((x<<(((((x|x)&(tmp = -1572694766, tmp))>>(x+(x/((x-(((tmp = 1435301275, tmp)|(tmp = 983577854.212041, tmp))>>(tmp = 632633852.1644179, tmp)))+x))))>>>x)|(-850932021)))>>x))<<(-821983991)));
-  assertEquals(0, x >>= (x>>(2424003553.0883207)));
-  assertEquals(2599386349, x -= (-2599386349));
-  assertEquals(-68157441, x |= (((tmp = -1170343454.9327996, tmp)+((((tmp = 448468098, tmp)|(x>>(x>>(((x>>(((x/(x&(x<<x)))<<(2436876051.2588806))^(3010167261)))%((tmp = 2577616315.7538686, tmp)>>>(-2953152591.015912)))%((tmp = -1304628613, tmp)/(x&((x|((-2000952119)%((691146914)/((tmp = 1480966978.7766845, tmp)<<((tmp = 2644449477.392441, tmp)|(-2143869305.871568))))))+(tmp = -315254308, tmp))))))))&(-2060205555))|((-604140518.8186448)^(x*x))))%(x*((tmp = 1383244000.2807684, tmp)/(3195793656)))));
-  assertEquals(-68157441, x |= x);
-  assertEquals(-1, x >>= x);
-  assertEquals(-2147483648, x <<= x);
-  assertEquals(-1.5257198286933313, x /= (tmp = 1407521622, tmp));
-  assertEquals(1149084989.47428, x += (((tmp = 1149084991.9004865, tmp)&x)^((((((2797053000)/(x^x))*(-2829253694))>>>((tmp = -610924351, tmp)>>x))>>>(tmp = -675681012, tmp))<<(2812852729))));
-  assertEquals(0, x %= x);
-  assertEquals(0, x <<= ((tmp = -584069073, tmp)*(-2953140326)));
-  assertEquals(0, x <<= (tmp = -481515023.6404002, tmp));
-  assertEquals(-1441535370, x ^= (2853431926));
-  assertEquals(2853431926, x >>>= (((((((tmp = 2215663525.9620194, tmp)%((-1102832735.9274108)/x))>>x)&(3220898702.76322))&(((2077584946)*((x>>x)<<((tmp = 1845701049, tmp)-x)))/(tmp = 1947184202.5737212, tmp)))|(((tmp = 2976351488, tmp)^(-42517339))%((2648230244.410125)^(1520051731.31089))))/(1761635964)));
-  assertEquals(43539, x >>>= (tmp = 1361671184.7432632, tmp));
-  assertEquals(21769, x >>= ((tmp = -804932298.9572575, tmp)>>((((tmp = 1749006993.253409, tmp)+(276536978))^x)|(2698166994))));
-  assertEquals(1103025563, x |= (tmp = 1103007891, tmp));
-  assertEquals(1327594607, x += (tmp = 224569044, tmp));
-  assertEquals(1327594607, x |= x);
-  assertEquals(-478674944, x <<= (((672378508)&x)^(((-2070209708.6470091)|x)|(x>>>x))));
-  assertEquals(-478674943, x ^= ((-1832457698.6345716)>>>((tmp = -3077714019, tmp)/(1809383028))));
-  assertEquals(229129701056053250, x *= x);
-  assertEquals(1, x /= x);
-  assertEquals(2, x <<= (-1522529727));
-  assertEquals(2, x &= x);
-  assertEquals(-2016989182, x |= ((((tmp = -1267845511, tmp)*(1225350332))+((tmp = -1397690831.5717893, tmp)>>>(tmp = -2575382994, tmp)))+x));
-  assertEquals(-241, x >>= (tmp = 931869591, tmp));
-  assertEquals(-1048087547, x &= (tmp = -1048087403.1163051, tmp));
-  assertEquals(-4004486369.844599, x += (tmp = -2956398822.844599, tmp));
-  assertEquals(-4004486368.844599, x -= (((2701878498)>>x)|(x|(-1079354967))));
-  assertEquals(1, x >>= (tmp = -1583689092, tmp));
-  assertEquals(1, x *= (x>>(x%x)));
-  assertEquals(0, x %= x);
-  assertEquals(-0, x *= (-120818969));
-  assertEquals(0, x >>= ((tmp = 1794099660, tmp)/(((x&(((-321906091)^(tmp = -3009885933.8449526, tmp))&((tmp = -140917780, tmp)|(2037803173.4075825))))&x)&(tmp = -745357154, tmp))));
-  assertEquals(0, x <<= (563984257.3493614));
-  assertEquals(NaN, x %= ((((x>>(tmp = -2190891392.320677, tmp))-x)<<(462714956))<<((tmp = -84413570, tmp)|((x|(-2787022855))-((tmp = 2028532622, tmp)|(tmp = 1103757073.9178817, tmp))))));
-  assertEquals(NaN, x *= ((2137674085.3142445)|((tmp = -1054749859.2353804, tmp)%x)));
-  assertEquals(NaN, x /= (x>>>(((((tmp = 597103360.9069608, tmp)>>>(-2850217714.1866236))-((tmp = 1125150527, tmp)*x))%(tmp = -982662312, tmp))|((x/(((968656808.6069037)*(((128484784.15362918)>>x)^x))&((((x/((((tmp = 748775979, tmp)*((x-(((tmp = 709571811.9883962, tmp)%(-2083567026))%(x/(tmp = -680467505, tmp))))/((tmp = -167543858, tmp)/(tmp = -3113588783, tmp))))/x)<<(-2605415230)))>>>(tmp = 3133054172, tmp))%(tmp = -1904650393, tmp))*((x|(-1193709562))*(tmp = -1731312795.718104, tmp)))))/((tmp = -672386301, tmp)/(tmp = 808898833.4163612, tmp))))));
-  assertEquals(-9, x |= (((((tmp = 150377964.57195818, tmp)/(tmp = 2161910879.0514045, tmp))-(-2381625849))>>(-2715928517))/(((452113643)^(-2502232011))/((-3076471740)^(((tmp = 1664851172, tmp)*(((-1460011714)>>>x)<<((-2870606437)%x)))*((tmp = -2836565755.609597, tmp)-((x/(tmp = -871461415, tmp))-(2278867564))))))));
-  assertEquals(-1, x >>= x);
-  assertEquals(-1, x |= ((-1319927272)>>>(-2866709980)));
-  assertEquals(-1, x >>= ((2345179803.155703)&(-978025218.2243443)));
-  assertEquals(1, x /= x);
-  assertEquals(-260730973, x |= (tmp = -260730973, tmp));
-  assertEquals(1174405120, x <<= (2681054073));
-  assertEquals(1174405120, x &= x);
-  assertEquals(1073741824, x &= (tmp = 2017166572.7622075, tmp));
-  assertEquals(1073741824, x |= x);
-  assertEquals(168806102, x %= ((((tmp = -2939969193.950067, tmp)|((-2325174027.614815)/(-2329212715)))*(x/(((((-2927776738)/(x|x))+(x%(tmp = -3007347037.698492, tmp)))<<(-1898633380))>>(tmp = 204338085.45241892, tmp))))^x));
-  assertEquals(168806102, x %= ((-832849739.5197744)&(tmp = -141908598, tmp)));
-  assertEquals(-401033205.05225074, x -= (tmp = 569839307.0522507, tmp));
-  assertEquals(-401033205, x &= x);
-  assertEquals(-401130402, x ^= ((x*(tmp = 311418759.22436893, tmp))>>x));
-  assertEquals(793533469, x ^= (-950312893.5201888));
-  assertEquals(756, x >>>= (-1096189516));
-  assertEquals(711, x += ((tmp = -753105189, tmp)>>(599823192.5381484)));
-  assertEquals(0, x >>>= ((tmp = -2859668634.4641137, tmp)+(-1160392986.1521513)));
-  assertEquals(2427599726.176195, x -= (-2427599726.176195));
-  assertEquals(1942312465.2523103, x -= (485287260.92388475));
-  assertEquals(0, x >>>= ((tmp = -1740656456, tmp)/(tmp = 1339746799.9335847, tmp)));
-  assertEquals(0, x <<= ((-7017077.38786912)*((-699490904.4551768)^x)));
-  assertEquals(0, x <<= (tmp = 715662384, tmp));
-  assertEquals(0, x *= (x>>>(2149735450.0758677)));
-  assertEquals(NaN, x /= x);
-  assertEquals(0, x >>= ((397078885)*((851639692.8982519)-x)));
-  assertEquals(0, x &= (-2526654445));
-  assertEquals(0, x %= (-1204924598));
-  assertEquals(251639720, x ^= (x|(tmp = 251639720, tmp)));
-  assertEquals(695433573, x ^= (663539405));
-  assertEquals(-1038050104, x -= (1733483677));
-  assertEquals(0, x ^= x);
-  assertEquals(NaN, x %= x);
-  assertEquals(0, x &= (392107269));
-  assertEquals(0, x %= (-3084908458.241551));
-  assertEquals(0, x ^= x);
-  assertEquals(-2121660509, x ^= (tmp = -2121660509.7861986, tmp));
-  assertEquals(2285041855588855800, x *= (x|(3209046634)));
-  assertEquals(54915072, x >>>= (x%(((((x%((((tmp = -1429433339.5078833, tmp)|(tmp = 2906845137, tmp))^(3207260333))&(-848438650)))-(-2721099735))&(141851917.19978714))+x)/x)));
-  assertEquals(54915072, x &= x);
-  assertEquals(54915072, x %= (x+(1855489160)));
-  assertEquals(70078753, x ^= ((((((-1648661736)+(x%((-1421237596)+(tmp = 2053180992.3857927, tmp))))+(tmp = 38606889, tmp))<<((-241334284)%((x>>(215316122))*(tmp = 396488307, tmp))))+((tmp = -2900704565, tmp)^x))^(((1103481003.1111188)^x)-(tmp = 1304113534, tmp))));
-  assertEquals(1149501440, x <<= ((x>>(tmp = 3203172843, tmp))*(tmp = -192535531, tmp)));
-  assertEquals(0, x ^= x);
-  assertEquals(0, x >>= ((tmp = 2751499787, tmp)&((tmp = 2217654798, tmp)*(tmp = -2798728014, tmp))));
-  assertEquals(NaN, x /= ((((-2019592425)>>>((((-1571930240.741224)>>>((-183952981)/((((1990518443.672842)>>(((((2051371284)%(685322833.6793983))>>>(2662885938))<<(-1212029669.6675105))|((-2790877875)<<(1546643473))))<<x)-(tmp = 804296674.4579233, tmp))))-(tmp = -417759051.68770766, tmp))/((-621859758)>>>x)))&x)<<(tmp = -48558935.55320549, tmp)));
-  assertEquals(0, x <<= (x&x));
-  assertEquals(0, x *= (x%(tmp = 301196068, tmp)));
-  assertEquals(398290944, x |= (((tmp = 1904146839, tmp)+(1521017178))*(-3174245888.562067)));
-  assertEquals(1256401076, x ^= (1566464180));
-  assertEquals(149620758, x %= ((tmp = 532626355, tmp)^(tmp = -382971203, tmp)));
-  assertEquals(149620791, x |= (x>>x));
-  assertEquals(-0.07034576194938641, x /= ((tmp = -1977313182.7573922, tmp)-x));
-  assertEquals(0, x <<= x);
-  assertEquals(0, x &= x);
-  assertEquals(0, x /= ((2182424851.139966)%(((-2768516150)+x)>>>x)));
-  assertEquals(0, x %= (-504299638.53962016));
-  assertEquals(-0, x *= (-2915134629.6909094));
-  assertEquals(0, x <<= ((tmp = 952692723.402582, tmp)%(2146335996.785011)));
-  assertEquals(230457472, x |= ((tmp = -574776101.8681948, tmp)*(683185125)));
-  assertEquals(933795934, x ^= (tmp = 974395614, tmp));
-  assertEquals(933801974, x ^= (x>>>((-148683729)*(((tmp = 2912596991.415531, tmp)^(-2883672328))/x))));
-  assertEquals(222, x >>= (-3060224682));
-  assertEquals(27, x >>>= (1429156099.1338701));
-  assertEquals(754519106, x ^= (tmp = 754519129.7281355, tmp));
-  assertEquals(188629776, x >>>= ((x>>>((1247267193)<<(tmp = -936228622, tmp)))%((tmp = 978604324.8236886, tmp)*((tmp = -3018953108, tmp)^(((tmp = 259650195, tmp)>>>(tmp = 2762928902.7901163, tmp))*(x>>((tmp = 787444263.5542864, tmp)/(x>>>(((-2039193776)<<(tmp = -1408159169, tmp))-(1238893783))))))))));
-  assertEquals(188629775.33987066, x += ((tmp = 1040520414, tmp)/((-1576237184)|((tmp = -970083705, tmp)&(((tmp = -312062761.12228274, tmp)|(1171754278.2968853))<<(-2069846597.7723892))))));
-  assertEquals(1473670, x >>>= ((tmp = 202409672, tmp)^x));
-  assertEquals(2171703268900, x *= (x>>(((tmp = 840468550, tmp)&(-3208057101.2136793))/x)));
-  assertEquals(0, x ^= x);
-  assertEquals(0, x ^= (x&((tmp = 2569871408.2405066, tmp)|((tmp = -3149374622, tmp)<<(x-(x|((tmp = -821239139.1626894, tmp)>>>x)))))));
-  assertEquals(NaN, x /= x);
-  assertEquals(NaN, x %= (tmp = 1926106354, tmp));
-  assertEquals(0, x >>= ((x/(-2848416))/(tmp = 2484293767, tmp)));
-  assertEquals(0, x <<= ((tmp = -2484137114, tmp)>>>(tmp = -887083772.8318355, tmp)));
-  assertEquals(0, x >>= (tmp = -2651389432, tmp));
-  assertEquals(0, x ^= x);
-  assertEquals(1041871201, x += ((tmp = 1041871201.9272791, tmp)|(x<<(-1136959830))));
-  assertEquals(651390879501530900, x *= ((tmp = 1250424964.0346212, tmp)>>x));
-  assertEquals(1965815296.245636, x %= ((2650603245.655831)+((-1610821947.8640454)>>>(((878987151.6917406)*((((784630543)%(((1448720244)>>(((tmp = 3036767847, tmp)+((tmp = 1012548422, tmp)<<(1957000200)))-x))/(x>>x)))<<((tmp = 914710268, tmp)*(((x^(1559603121))<<(tmp = 3181816736, tmp))|((-1964115655)+x))))-(-1055603890)))&(946797797.0616649)))));
-  assertEquals(1965815296.245636, x %= (tmp = -2601038357.593118, tmp));
-  assertEquals(-769384440.872302, x += (-2735199737.117938));
-  assertEquals(-769384440.872302, x %= (2193123162));
-  assertEquals(1, x /= x);
-  assertEquals(1, x -= (((x>>>(-1968465925))*((tmp = 563037904, tmp)>>((tmp = 3009534415.769578, tmp)>>((-2567240601.7038674)<<(tmp = -1258402723.4150183, tmp)))))%(3112239470.276867)));
-  assertEquals(1, x |= x);
-  assertEquals(1505461527, x ^= (tmp = 1505461526.5858076, tmp));
-  assertEquals(406553877, x &= (tmp = 2558242293, tmp));
-  assertEquals(406553877, x |= x);
-  assertEquals(-574902339, x |= ((-709809495)%(tmp = -2880884811.410611, tmp)));
-  assertEquals(-20281777.349363208, x %= (22184822.46602547));
-  assertEquals(1, x /= x);
-  assertEquals(-4360732, x ^= ((x|(tmp = 3178620274, tmp))>>(((2686286888)&(((-1107223053.8716578)/(((-2955575332.3675404)+(-2770518721))|(-2705016953.640522)))-x))^((1473641110.4633303)*((((-1466496401)<<x)+x)%(1805868749.082736))))));
-  assertEquals(-1158545408, x <<= ((((x/((-2710098221.691819)-(-2421462965.788145)))/(((((x>>>(tmp = 1994541591.1032422, tmp))+(tmp = -1276676679.9747126, tmp))&((tmp = 1764029634.2493339, tmp)+((x|(tmp = -3050446156, tmp))-((tmp = -9441859, tmp)/(((-2072420232)&x)*(-1003199889))))))+(tmp = -2443230628, tmp))*x))*((x&((((x|(747566933))*(((2039741506)>>>((tmp = -2456000554, tmp)>>>(-1566360933.7788877)))^((tmp = 960600745, tmp)/x)))&(x^(((-2649310348.777452)^((2224282875)-(tmp = -2129141087.3182096, tmp)))<<((x<<x)+((-1307892509.3874407)-(x|(tmp = -2831643528.9720087, tmp)))))))/(((tmp = -35502946, tmp)<<((tmp = 1091279222, tmp)>>(((-2686069468.8930416)-x)+(tmp = 367442353.2904701, tmp))))%(1218262628))))/x))^(-919079153.7857773)));
-  assertEquals(747, x >>>= (1229157974));
-  assertEquals(747, x |= x);
-  assertEquals(NaN, x %= (((3086718766.4715977)*((7912648.497568846)*((-2713828337.1659327)*(-176492425.4011252))))<<(tmp = -1074475173, tmp)));
-  assertEquals(0, x >>>= ((((444923201)<<x)>>>(-883391420.2142565))*((((617245412)<<x)>>>x)*(-913086143.2793813))));
-  assertEquals(1941802406, x ^= (tmp = -2353164890, tmp));
-  assertEquals(14, x >>>= (-1600311077.4571416));
-  assertEquals(-18229482703.7246, x += (((x+(-993157139.7880647))%x)*(1862419512.1781366)));
-  assertEquals(-14.531388114858734, x /= ((tmp = -1649072797.951641, tmp)<<x));
-  assertEquals(0, x ^= x);
-  assertEquals(0, x >>= ((x/x)^x));
-  assertEquals(2, x ^= ((-1597416259)/(-738770020)));
-  assertEquals(0, x >>= (tmp = -387850072.74833393, tmp));
-  assertEquals(0, x >>>= ((2491085477.186817)>>(x*(((tmp = -1592498533, tmp)+(tmp = 2086841852, tmp))&(-3174019330.8288536)))));
-  assertEquals(0, x >>= x);
-  assertEquals(0, x >>>= (tmp = -3045348659.45243, tmp));
-  assertEquals(-1208573479, x |= ((3086393817)-x));
-  assertEquals(1460649854142163500, x *= x);
-  assertEquals(1588199424, x <<= (-1902076952));
-  assertEquals(1586102272, x &= (tmp = 2139876091.9142454, tmp));
-  assertEquals(-460908552.5528109, x -= (tmp = 2047010824.552811, tmp));
-  assertEquals(-460908552.5528109, x %= (tmp = 507904117.09368753, tmp));
-  assertEquals(-460908552.5528109, x %= (2749577642.527038));
-  assertEquals(234012, x >>>= (-340465746.91275));
-  assertEquals(0, x >>>= x);
-  assertEquals(0, x %= (tmp = -2601875531, tmp));
-  assertEquals(0, x %= (x|(tmp = 650979981.1158671, tmp)));
-  assertEquals(0, x %= (tmp = -2286020987, tmp));
-  assertEquals(0, x |= x);
-  assertEquals(0, x &= (x|((tmp = 2568101411, tmp)-(-1438002403))));
-  assertEquals(0, x >>>= (1399248574));
-  assertEquals(0, x %= (-1906670287.2043698));
-  assertEquals(0, x >>= (1019286379.6962404));
-  assertEquals(0, x |= (x/(tmp = -82583591.62643051, tmp)));
-  assertEquals(NaN, x %= x);
-  assertEquals(NaN, x *= (x^(1874776436)));
-  assertEquals(NaN, x -= ((-1238826797)-(-2971588236.7228813)));
-  assertEquals(0, x <<= (2064632559));
-  assertEquals(-0.5967273958864694, x += (((tmp = 1502995019, tmp)>>x)/(-2518729707)));
-  assertEquals(0, x >>>= x);
-  assertEquals(-0, x /= (-1923030890));
-  assertEquals(NaN, x %= x);
-  assertEquals(0, x >>= (tmp = 1081732779.9449487, tmp));
-  assertEquals(-820183066, x |= ((tmp = -3169007292.4721155, tmp)|(-1912588318)));
-  assertEquals(0, x -= x);
-  assertEquals(NaN, x %= x);
-  assertEquals(NaN, x /= (tmp = 287181840, tmp));
-  assertEquals(0, x &= (x/((tmp = -1139766051, tmp)<<(x&(tmp = 2779004578, tmp)))));
-  assertEquals(0, x >>= (((tmp = -1816938028, tmp)+(-224851993.3139863))*(-2933829524)));
-  assertEquals(0, x |= ((((tmp = 305077929.1808746, tmp)&((x-(((((tmp = 2122810346.7475111, tmp)<<(717271979))*(tmp = 256854043.72633624, tmp))%((x+(tmp = -318657223.9992106, tmp))*((1993144830)<<(2594890698.603228))))^((((tmp = 257370667, tmp)>>>((((x^(3160746820))>>>(2049640466.8116226))>>>(2543930504.7117066))^(x-x)))^(x%(964838975)))^x)))%(x*x)))>>>x)*(tmp = -46861540, tmp)));
-  assertEquals(747575633, x ^= ((-2406502427)-(-3154078060.3794584)));
-  assertEquals(0, x *= (x%x));
-  assertEquals(0, x <<= (1313773705.3087234));
-  assertEquals(0, x >>>= ((x+x)>>>(3068164056)));
-  assertEquals(-0, x *= (tmp = -1771797797, tmp));
-  assertEquals(1784146970, x ^= (tmp = 1784146970, tmp));
-  assertEquals(1784146970, x >>>= (tmp = -2219972320.7195597, tmp));
-  assertEquals(1744830464, x <<= ((((-2769476584)-(((1798431604)>>(tmp = 1337687914.799577, tmp))>>>((-2802941943.15014)>>x)))>>>(tmp = 646033678, tmp))-x));
-  assertEquals(3044433348102455300, x *= x);
-  assertEquals(0, x >>= ((tmp = 1592076570.1900845, tmp)-((645774223.6317859)>>x)));
-  assertEquals(0, x >>= (x>>>(-3045822290.1536255)));
-  assertEquals(-0, x *= (tmp = -2450298800.986624, tmp));
-  assertEquals(0, x >>= (tmp = 1379605393, tmp));
-  assertEquals(0, x &= (((x-((((tmp = 837939461.6683749, tmp)+((((-813261853.3247359)|(x&(((-2565113940)*(tmp = -2725085381.240134, tmp))|x)))%(-1457259320))-(x+((tmp = -273947066, tmp)%((1164825698.879649)>>(1653138880.3434052))))))>>>(2823967606.411492))>>>((((((((1189235604.9646997)/(tmp = -2875620103.4002438, tmp))-(tmp = -801261493, tmp))<<(((1832556579.5095325)<<x)|((tmp = -2740330665, tmp)>>(tmp = -2352814025, tmp))))-(tmp = -1445043552.99499, tmp))&(x<<(((((445325471)*(1293047043.1808558))>>>(((1901837408.5910044)-(tmp = -2349093446.5313253, tmp))>>>(tmp = 1000847053.1861948, tmp)))*(x>>>(1771853406.6567078)))>>x)))>>>x)>>>(x^((tmp = 2813422715, tmp)-(x+(-342599947)))))))&(x>>>x))*x));
-  assertEquals(NaN, x %= ((tmp = -3027713526, tmp)-((((x%(((((x/((2711155710)^(((((x>>>x)%((1098599291.155015)^(((((tmp = 1855724377.8987885, tmp)/(x|x))*((-1963179786)*((x-((-1634717702)%x))<<x)))>>(2008859507))>>((tmp = 2635024299.7983694, tmp)^(tmp = -602049246, tmp)))))*(x>>x))&(tmp = -1925103609, tmp))*((tmp = 2106913531.2828505, tmp)%((tmp = -200970069, tmp)*(-2809001910.951446))))))%x)*((1990098169)>>((x<<(2303347904.2601404))%x)))|(2767962065.9846206))+(201589933.301661)))>>(((tmp = 1921071149.5140274, tmp)>>(1054558799.1731887))|x))*(x/((((-2833879637.345674)>>>(tmp = 2849099601, tmp))%x)+(x%(x%(((tmp = 1983018049, tmp)^(tmp = -2659637454, tmp))>>((-1335497229.6945198)-(x+(((((tmp = 1136612609.848967, tmp)%(2471741030.01762))<<(x|(((tmp = 1644081190.1972675, tmp)&(-1422527338))^(2379264356.265957))))/(tmp = 2979299484.1884174, tmp))/x)))))))))*((tmp = 1858298882, tmp)^((tmp = -547417134.9651439, tmp)*x)))));
-  assertEquals(-7664, x |= ((2286000258.825538)>>(1716389170)));
-  assertEquals(-1, x >>= x);
-  assertEquals(-1231640486.3023372, x += ((tmp = 1231640485.3023372, tmp)*x));
-  assertEquals(-2463280972.6046743, x += x);
-  assertEquals(1746, x >>>= x);
-  assertEquals(1746, x >>>= (((tmp = -562546488.0669937, tmp)*((-2475357745.8508205)&((x%(821425388.8633704))%((((-2315481592.687686)&(((tmp = 3130530521.7453523, tmp)+x)-x))^(-973033390.1773088))/x))))<<x));
-  assertEquals(1746, x %= (-1544973951.076033));
-  assertEquals(27936, x <<= (-525441532.33816123));
-  assertEquals(27936, x %= (x*((tmp = 344991423.5336287, tmp)+(-2267207281))));
-  assertEquals(27, x >>>= (tmp = 1249792906, tmp));
-  assertEquals(0, x >>>= (tmp = -1068989615, tmp));
-  assertEquals(0, x >>>= (tmp = 347969658.92579734, tmp));
-  assertEquals(-2656611892, x -= (2656611892));
-  assertEquals(1944539596, x |= (((tmp = 3000889963, tmp)-x)<<((tmp = 2917390580.5323124, tmp)^(-996041439))));
-  assertEquals(1944539596, x |= x);
-  assertEquals(-739740167.0752468, x -= ((1712009965.0752468)+(x>>((tmp = -740611560.99014, tmp)>>>((tmp = -1033267419.6253037, tmp)&(862184116.3583733))))));
-  assertEquals(-1479480334.1504936, x += x);
-  assertEquals(-4294967296.150494, x -= (x>>>((1219235492.3661718)&(3138970355.0665245))));
-  assertEquals(0, x >>= (x*x));
-  assertEquals(-0, x *= ((-2202530054.6558375)-(-676578695)));
-  assertEquals(-0, x %= (1336025846));
-  assertEquals(0, x &= x);
-  assertEquals(0, x /= (1759366510));
-  assertEquals(630007622, x |= (630007622));
-  assertEquals(-0.22460286863455903, x /= (tmp = -2804984753, tmp));
-  assertEquals(1102410276.775397, x -= (-1102410277));
-  assertEquals(1102410276.775397, x %= ((((-2569525203)&x)*(x|(-1932675298)))/((-2376634450)>>>(x>>>(tmp = 936937604.9491489, tmp)))));
-  assertEquals(33642, x >>= (3028252527));
-  assertEquals(2181106522.688034, x -= (-2181072880.688034));
-  assertEquals(-2113861630, x &= (2523921542));
-  assertEquals(-2147483646, x &= (-1996601566.9370148));
-  assertEquals(-2147483648, x &= (tmp = -665669175.1968856, tmp));
-  assertEquals(-2858673260.1367273, x -= (tmp = 711189612.1367272, tmp));
-  assertEquals(350657, x >>= (tmp = -170243892.25474262, tmp));
-  assertEquals(-0.0001405571562140975, x /= (-2494764474.7868776));
-  assertEquals(0, x ^= x);
-  assertEquals(NaN, x /= ((x&(-2041236879))*((tmp = -2182530229, tmp)^((1274197078)*x))));
-  assertEquals(0, x |= (x&(x-(1794950303))));
-  assertEquals(1222105379, x |= (tmp = 1222105379, tmp));
-  assertEquals(729884484, x ^= (tmp = 1666645607.6907792, tmp));
-  assertEquals(729884484, x %= (tmp = -2896922082, tmp));
-  assertEquals(8768, x &= ((tmp = 358940932, tmp)>>>(3159687631.3308897)));
-  assertEquals(1892384495, x |= (-2402591569));
-  assertEquals(1892470533, x += ((((x^(-2266612043))>>>(tmp = -531009952, tmp))<<(x>>>((-1365315963.5698428)>>>((x+((-3168207800.184341)-(tmp = 1776222157.609917, tmp)))+(-1588857469.3596382)))))>>>x));
-  assertEquals(143587205, x += (tmp = -1748883328, tmp));
-  assertEquals(0, x ^= x);
-  assertEquals(0, x >>= (tmp = 2334880462.3195543, tmp));
-  assertEquals(0, x &= ((tmp = 1819359625.4396145, tmp)|(tmp = -1323513565, tmp)));
-  assertEquals(-1102259874, x ^= (3192707422));
-  assertEquals(2567457772588852700, x *= (-2329267202));
-  assertEquals(-16783687, x |= ((-2212476227.060922)^(378973700.78452563)));
-  assertEquals(4278183609, x >>>= ((((((((tmp = 1766363150.197206, tmp)*(-2774552871))%x)>>>((3071429820)&((((((tmp = 351068445.27642524, tmp)<<(tmp = 2646575765, tmp))^(806452682))<<((x>>>(-2217968415.505327))<<(1564726716)))|x)-(tmp = -3110814468.9023848, tmp))))+x)^x)>>>(tmp = -617705282.0788529, tmp))>>>x));
-  assertEquals(4314933530, x -= ((1032195469.789219)|(tmp = -448053861.9531791, tmp)));
-  assertEquals(9709850, x %= (((tmp = -3056286252.5853324, tmp)*x)&x));
-  assertEquals(9709850, x %= (tmp = -2596800940, tmp));
-  assertEquals(2655489828.9461126, x -= (tmp = -2645779978.9461126, tmp));
-  assertEquals(369266212, x &= (((335712316.24874604)|(tmp = 33648215, tmp))-((x/(2639848695))<<((-499681175)<<(-2490554556)))));
-  assertEquals(-2147483648, x <<= (-834465507));
-  assertEquals(1073741824, x >>>= (((tmp = 3018385473.1824775, tmp)>>(x*(-2574502558.216812)))|(((tmp = -1742844828, tmp)*(1698724455))&x)));
-  assertEquals(-270818218, x += (-1344560042));
-  assertEquals(360710144, x <<= x);
-  assertEquals(0, x <<= (tmp = 612718075, tmp));
-  assertEquals(0, x <<= x);
-  assertEquals(-0, x /= (tmp = -1922423684, tmp));
-  assertEquals(-0, x *= ((((tmp = 741806213.3264687, tmp)%(-711184803.2022421))+((tmp = -3209040938, tmp)&(525355849.044886)))&(x<<(tmp = -698610297, tmp))));
-  assertEquals(0, x <<= (-482471790));
-  assertEquals(0, x &= ((-921538707)/(tmp = -482498765.988616, tmp)));
-  assertEquals(0, x ^= (x^x));
-  assertEquals(-351721702, x ^= (-351721702.8850286));
-  assertEquals(726242219625599900, x -= ((2064820612)*x));
-  assertEquals(1452484439251199700, x += x);
-  assertEquals(2.52318299412847e-15, x %= ((((x<<((2508143285)+x))>>(-2493225905.011774))%(1867009511.0792103))/((((x<<(2542171236))>>((x|x)&(tmp = -384528563, tmp)))+((-1168755343)*(1731980691.6745195)))+(tmp = -1608066022.71164, tmp))));
-  assertEquals(79905008, x += ((((-2702081714.590131)&(x+(tmp = -1254725471.2121565, tmp)))*(3088309981))%(((tmp = 1476844981.1453142, tmp)|((((tmp = -1243556934.7291331, tmp)%x)^(-1302096154))+((660489180)/(tmp = -681535480.8642154, tmp))))^(tmp = -8410710, tmp))));
-  assertEquals(1215822204, x ^= ((-3008054900)>>>(tmp = -1990206464.460693, tmp)));
-  assertEquals(-394790532, x |= ((((-1334779133.2038574)+(tmp = -1407958866.832946, tmp))<<(1699208315))-(((x^(x%x))<<(3216443))>>(x+((((2576716374.3081336)|((tmp = 2316167191.348064, tmp)&((51086351.20208645)&((x|(tmp = -357261999, tmp))^(x/x)))))*(-45901631.10155654))*(((-439588079)>>>((-2358959768.7634916)|(1613636894.9373643)))+(((-908627176)<<x)%(x%((-1669567978)>>>((x>>(1289400876))+(tmp = 2726174270, tmp)))))))))));
-  assertEquals(-0.17717467607696327, x /= (2228255982.974148));
-  assertEquals(-1905616474, x ^= (tmp = 2389350822.851587, tmp));
-  assertEquals(-0, x %= x);
-  assertEquals(2818124981.508915, x -= (-2818124981.508915));
-  assertEquals(-1476842315, x |= x);
-  assertEquals(73408564, x &= (-3147390604.3453345));
-  assertEquals(70, x >>>= x);
-  assertEquals(1, x >>= x);
-  assertEquals(3086527319.899181, x *= (3086527319.899181));
-  assertEquals(-145, x >>= x);
-  assertEquals(-145, x %= (tmp = -2500421077.3982406, tmp));
-  assertEquals(-1, x >>= (tmp = -2970678326.712191, tmp));
-  assertEquals(-1, x %= ((tmp = -535932632.4668834, tmp)+(((-1226598339.347982)<<((tmp = 616949449, tmp)/(tmp = 2779464046, tmp)))/(214578501.67984307))));
-  assertEquals(1, x *= x);
-  assertEquals(1, x >>= ((tmp = 11080208, tmp)<<(460763913)));
-  assertEquals(-1.8406600706723492e-19, x /= ((tmp = -2334126306.1720915, tmp)*(tmp = 2327566272.5901165, tmp)));
-  assertEquals(856681434186007200, x -= ((tmp = -2286974992.8133907, tmp)*(374591518)));
-  assertEquals(3126084224, x >>>= x);
-  assertEquals(-1160460669, x |= (tmp = 181716099, tmp));
-  assertEquals(873988096, x <<= (tmp = 406702419, tmp));
-  assertEquals(0, x <<= ((tmp = 802107965.4672925, tmp)-((tmp = 1644174603, tmp)>>((tmp = 604679952, tmp)+(tmp = -515450096.51425123, tmp)))));
-  assertEquals(NaN, x %= ((x>>(tmp = 2245570378, tmp))*(tmp = 1547616585, tmp)));
-  assertEquals(NaN, x /= ((tmp = -776657947.0382309, tmp)&(tmp = 163929332.28270507, tmp)));
-  assertEquals(NaN, x *= (tmp = 243725679.78916526, tmp));
-  assertEquals(NaN, x /= (x>>x));
-  assertEquals(0, x <<= ((tmp = -1293291295.5735884, tmp)%(((((63309078)>>>x)&(x&(-2835108260.025297)))+x)>>>(-1317213424))));
-  assertEquals(0, x *= ((((tmp = -1140319441.0068483, tmp)*(tmp = 2102496185, tmp))&(-2326380427))<<(tmp = -2765904696, tmp)));
-  assertEquals(0, x /= (tmp = 2709618593, tmp));
-  assertEquals(0, x >>= (-1753085095.7670164));
-  assertEquals(1766381484, x |= (-2528585812));
-  assertEquals(1766381484, x %= (2735943476.6363373));
-  assertEquals(1766381484, x %= (x*(tmp = 2701354268, tmp)));
-  assertEquals(-2147483648, x <<= (-323840707.4949653));
-  assertEquals(4611686018427388000, x *= (x<<x));
-  assertEquals(0, x <<= (3066735113));
-  assertEquals(0, x ^= ((((x*x)^(tmp = -2182795086.39927, tmp))<<(x^(tmp = 1661144992.4371827, tmp)))<<((((-2885512572.176741)*(tmp = 609919485, tmp))|(tmp = 929399391.0790694, tmp))>>>((((((((((399048996)>>((-107976581.61751771)>>>x))|(((-1502100015)<<(tmp = -1108852531.9494338, tmp))&(x/(tmp = -3198795871.7239237, tmp))))+((-2627653357)>>x))>>>x)*(1066736757.2718519))%(tmp = 1326732482.201604, tmp))/(tmp = 2513496019.814191, tmp))>>>((1694891519)>>>(-2860217254.378931)))<<(tmp = 31345503, tmp)))));
-  assertEquals(0, x ^= (x/((-2556481161)>>>(x/(x%(x&(1302923615.7148068)))))));
-  assertEquals(NaN, x /= x);
-  assertEquals(NaN, x += (tmp = 846522031, tmp));
-  assertEquals(0, x >>= (x+(-1420249556.419045)));
-  assertEquals(0, x ^= (((x%(-1807673170))&x)-x));
-  assertEquals(-3484.311990686845, x -= ((((((-510347602.0068991)>>>x)<<((tmp = 1647999950, tmp)&(((305407727)>>((1781066601.791009)&x))<<((tmp = -998795238, tmp)%(((x/x)+x)<<(((2586995491.434947)<<x)-((((tmp = 545715607.9395425, tmp)*x)>>>x)>>>(((((2332534960.4595165)^(-3159493972.3695474))<<(tmp = 867030294, tmp))|(2950723135.753855))^(((3150916666)<<x)>>((tmp = 414988690, tmp)|((tmp = -1879594606, tmp)/(tmp = 1485647336.933429, tmp))))))))))))>>(tmp = -2676293177, tmp))%(617312699.1995015))/((((tmp = -1742121185, tmp)^((((x&x)<<(tmp = 698266916, tmp))/(-1860886248))+((-213304430)%((((((-2508973021.1333447)+(tmp = 2678876318.4903, tmp))&(tmp = -43584540, tmp))-x)^(-2251323850.4611115))-x))))>>>(tmp = 2555971284, tmp))%((((tmp = 16925106, tmp)^x)&x)|((x/((x|(tmp = -2787677257.125139, tmp))<<(-853699567)))+(tmp = -1721553520, tmp))))));
-  assertEquals(-447873933.26863855, x += (-447870448.9566479));
-  assertEquals(200591060101520900, x *= x);
-  assertEquals(200591062202483420, x -= (-2100962536));
-  assertEquals(-5.261023346568228e+24, x *= ((tmp = -419641692.6377077, tmp)>>(tmp = -224703100, tmp)));
-  assertEquals(1269498660, x |= (195756836));
-  assertEquals(1269498660, x |= x);
-  assertEquals(1269498660, x |= x);
-  assertEquals(-37.75978948486164, x /= (((tmp = -595793780, tmp)+((tmp = 2384365752, tmp)>>>(1597707155)))|((968887032)^(tmp = 2417905313.4337964, tmp))));
-  assertEquals(-37.75978948486164, x %= (tmp = -1846958365.291661, tmp));
-  assertEquals(1102319266.6421175, x += (1102319304.401907));
-  assertEquals(-1664202255175155200, x -= ((x^(tmp = 407408729, tmp))*x));
-  assertEquals(-752874653, x ^= (tmp = 314673507, tmp));
-  assertEquals(-72474761, x |= (tmp = -2538726025.8884344, tmp));
-  assertEquals(-72474761, x |= x);
-  assertEquals(-122849418, x += ((tmp = -2332080457, tmp)|(((((30496388.145492196)*(((-1654329438.451212)|(-2205923896))&(x>>(tmp = -1179784444.957002, tmp))))&(tmp = 319312118, tmp))*(651650825))|(((-2305190283)|x)>>>(-428229803)))));
-  assertEquals(994, x >>>= x);
-  assertEquals(614292, x *= (((((2565736877)/((tmp = 649009094, tmp)>>>(((x>>>(2208471260))>>(x>>>x))%x)))&(tmp = 357846438, tmp))<<(tmp = -2175355851, tmp))%x));
-  assertEquals(1792008118, x |= (tmp = 1791924774.5121183, tmp));
-  assertEquals(1246238208, x &= (tmp = 1264064009.9569638, tmp));
-  assertEquals(-88877082, x ^= (2969289190.285704));
-  assertEquals(0.044923746573582474, x /= ((tmp = -3057438043, tmp)^(-1009304907)));
-  assertEquals(0, x <<= ((-828383918)-((((x>>(734512101))*(tmp = -3108890379, tmp))-(x|((tmp = 3081370585.3127823, tmp)^((-271087194)-(x/(tmp = -2777995324.4073873, tmp))))))%x)));
-  assertEquals(1604111507.3365753, x -= (-1604111507.3365753));
-  assertEquals(-1721314970, x ^= (tmp = -956686859, tmp));
-  assertEquals(-102247425, x |= (tmp = -2535095555, tmp));
-  assertEquals(-102247425, x %= (-955423877));
-  assertEquals(1053144489850425, x *= (((tmp = 1583243590.9550207, tmp)&(1356978114.8592746))|(tmp = -10299961.622774363, tmp)));
-  assertEquals(-0.0043728190668037336, x /= ((-1196259252.435701)*(((-689529982)|(tmp = -1698518652.4373918, tmp))<<x)));
-  assertEquals(-2, x ^= (((x+(tmp = 2961627388, tmp))>>(tmp = 231666110.84104693, tmp))|x));
-  assertEquals(-1, x >>= (tmp = -83214419.92958307, tmp));
-  assertEquals(-1, x %= (-1303878209.6288595));
-  assertEquals(2944850457.5213213, x -= (tmp = -2944850458.5213213, tmp));
-  assertEquals(-1.6607884436053055, x /= (-1773164107));
-  assertEquals(-0.6607884436053055, x %= ((x>>(1240245489.8629928))%(tmp = -3044136221, tmp)));
-  assertEquals(-0, x *= ((x*x)>>>((1069542313.7656753)+x)));
-  assertEquals(0, x >>>= (tmp = -202931587.00212693, tmp));
-  assertEquals(-0, x *= (-375274420));
-  assertEquals(0, x |= ((x/(((tmp = -876417141, tmp)*(x>>>x))&(-2406962078)))<<x));
-  assertEquals(0, x &= ((tmp = -650283599.0780096, tmp)*(tmp = 513255913.34108484, tmp)));
-  assertEquals(3027255453.458466, x += (3027255453.458466));
-  assertEquals(-12568623413253943000, x *= (((x-(198689694.92141533))|x)-x));
-  assertEquals(-12568623410285185000, x -= (tmp = -2968758030.3694654, tmp));
-  assertEquals(-2008903680, x &= (3111621747.7679076));
-  assertEquals(-110045263.26583672, x += (tmp = 1898858416.7341633, tmp));
-  assertEquals(15964, x >>>= (1141042034));
-  assertEquals(31928, x += x);
-  assertEquals(0, x ^= x);
-  assertEquals(-1159866377, x |= (-1159866377));
-  assertEquals(0, x ^= x);
-  assertEquals(3072699529.4306993, x -= (tmp = -3072699529.4306993, tmp));
-  assertEquals(1, x /= x);
-  assertEquals(-1471195029, x |= (2823772267.429641));
-  assertEquals(-4152937108, x += (-2681742079));
-  assertEquals(142030188, x |= x);
-  assertEquals(270, x >>= (tmp = 1013826483, tmp));
-  assertEquals(0, x >>>= (529670686));
-  assertEquals(-2912300367, x -= (2912300367));
-  assertEquals(2213791134963007500, x *= (x<<((((-3214746140)>>(tmp = -588929463, tmp))+((tmp = -3084290306, tmp)>>x))>>x)));
-  assertEquals(2213791133466809900, x -= (tmp = 1496197641, tmp));
-  assertEquals(69834416, x >>>= (x|(((2755815509.6323137)^(x%(((x*((((tmp = 375453453, tmp)<<(x*x))>>(tmp = -973199642, tmp))*x))>>((tmp = -356288629, tmp)>>(tmp = 2879464644, tmp)))<<((((1353647167.9291127)>>>(x/x))<<((2919449101)/(2954998123.5529594)))^x))))&((-2317273650)>>>(tmp = 34560010.71060455, tmp)))));
-  assertEquals(69834416, x >>>= (x^(-2117657680.8646245)));
-  assertEquals(2217318064, x -= ((tmp = 2035883891, tmp)<<(tmp = -1884739265, tmp)));
-  assertEquals(-1272875686, x ^= (tmp = 805889002.7165648, tmp));
-  assertEquals(-1272875686, x >>= (x&(((1750455903)*x)>>((722098015)%((tmp = 1605335626, tmp)>>(tmp = -565369634, tmp))))));
-  assertEquals(-1274351316, x -= (x>>>((tmp = 2382002632, tmp)-((tmp = -2355012843, tmp)+(1465018311.6735773)))));
-  assertEquals(-2982908522.4418216, x -= ((tmp = 1635549038.4418216, tmp)+(((1952167017.720186)&((tmp = -2284822073.1002254, tmp)>>(-1403893917)))%(tmp = 655347757, tmp))));
-  assertEquals(312, x >>>= x);
-  assertEquals(1248, x <<= (2376583906));
-  assertEquals(0, x ^= x);
-  assertEquals(0, x *= ((((tmp = 1914053541.881434, tmp)>>>(tmp = 1583032186, tmp))>>>(-2511688231))%(tmp = -2647173031, tmp)));
-  assertEquals(0, x >>>= (tmp = -2320612994.2421227, tmp));
-  assertEquals(0, x %= (((x+(tmp = -720216298.5403998, tmp))<<(414712685))>>(tmp = 480416588, tmp)));
-  assertEquals(0, x >>= ((((3039442014.271272)<<x)%(-2402430612.9724464))&((-2141451461.3664773)%((x>>(1361764256))/((tmp = -1723952801.9320493, tmp)%(477351810.2485285))))));
-  assertEquals(-0, x /= (tmp = -1627035877, tmp));
-  assertEquals(0, x >>>= (tmp = 1745193212, tmp));
-  assertEquals(0, x >>>= (2309131575));
-  assertEquals(NaN, x %= (((x*(tmp = -1730907131.6124666, tmp))%((((1481750041)|(x>>((((x>>>(tmp = 3128156522.5936565, tmp))/(tmp = -1277222645.9880452, tmp))^(tmp = -2327254789, tmp))+x)))>>>(-1161176960))>>>(tmp = 3135906272.5466847, tmp)))*(((((-2230902834.464362)^(1822893689.8183987))+(((tmp = 1597326356, tmp)/(x&((tmp = -3044163063.587389, tmp)>>(tmp = 2844997555, tmp))))%(x^x)))>>((x|x)/x))^(2634614167.2529745))));
-  assertEquals(0, x &= (3081901595));
-  assertEquals(0, x &= (-2453019214.8914948));
-  assertEquals(0, x &= x);
-  assertEquals(0, x >>>= (-596810618.3666217));
-  assertEquals(0, x >>= (((908276623)|x)/x));
-  assertEquals(0, x ^= x);
-  assertEquals(958890056, x |= (tmp = 958890056.474458, tmp));
-  assertEquals(1325436928, x <<= (tmp = -2474326583, tmp));
-  assertEquals(711588532333838300, x *= ((-148161646.68183947)<<(tmp = -1149179108.8049204, tmp)));
-  assertEquals(0, x ^= (((2862565506)%x)/(tmp = -2865813112, tmp)));
-  assertEquals(-2064806628, x += (((tmp = -2677361175.7317276, tmp)/((817159440)>>>(tmp = 1895467706, tmp)))^(x|(tmp = -2309094859, tmp))));
-  assertEquals(-69806982479424, x *= ((x&(tmp = 2857559765.1909904, tmp))&(-3166908966.754988)));
-  assertEquals(-430255744, x %= ((((((-2968574724.119535)<<x)<<((tmp = 1603913671, tmp)%((-1495838556.661653)^(tmp = 1778219751, tmp))))*(-400364265))<<((((1607866371.235576)-(1961740136))|(1259754297))&(tmp = -1018024797.1352971, tmp)))^x));
-  assertEquals(6.828637393208647e-7, x /= (x*(tmp = 1464421, tmp)));
-  assertEquals(0, x &= x);
-  assertEquals(-0, x *= (((tmp = -2510016276, tmp)-(2088209546))<<((tmp = -1609442851.3789036, tmp)+(tmp = 1919930212, tmp))));
-  assertEquals(-0, x %= (tmp = 1965117998, tmp));
-  assertEquals(-290294792.53186846, x += ((tmp = -2361555894.5318685, tmp)%(2071261102)));
-  assertEquals(-70873, x >>= (tmp = 2206814124, tmp));
-  assertEquals(-141746, x += x);
-  assertEquals(-141733.9831459089, x -= (((tmp = -806523527, tmp)>>>(tmp = 1897214891, tmp))/x));
-  assertEquals(-141733.9831459089, x %= ((tmp = 1996295696, tmp)<<(tmp = 3124244672, tmp)));
-  assertEquals(141733.9831459089, x /= (x>>(2688555704.561076)));
-  assertEquals(3196954517.3075542, x -= (tmp = -3196812783.3244085, tmp));
-  assertEquals(-19929155, x |= (((x|x)+x)^((tmp = 391754876, tmp)-(((((((tmp = -3051902902.5100636, tmp)*(x/(1546924993)))|(tmp = 1494375949, tmp))/((((-795378522)/(tmp = 509984856, tmp))>>>(tmp = -106173186, tmp))+x))|x)|(1916921307))>>>x))));
-  assertEquals(1279271449, x &= ((tmp = 1289446971, tmp)&(tmp = 1836102619, tmp)));
-  assertEquals(17876992, x <<= (-207633461));
-  assertEquals(0, x >>= (tmp = -903885218.9406946, tmp));
-  assertEquals(0, x >>>= x);
-  assertEquals(-2999, x -= (((754533336.2183633)%(tmp = 557970276.0537136, tmp))>>(tmp = -1171045520, tmp)));
-  assertEquals(-0.000003020470363504361, x /= (tmp = 992891715.2229724, tmp));
-  assertEquals(1, x /= x);
-  assertEquals(0.45768595820301217, x %= ((tmp = 673779031, tmp)/(tmp = -1242414872.3263657, tmp)));
-  assertEquals(-980843052.1872087, x += (tmp = -980843052.6448946, tmp));
-  assertEquals(-Infinity, x /= ((((tmp = 317747175.8024508, tmp)&(x&(((tmp = 1632953053, tmp)>>x)/x)))%x)/(3145184986)));
-  assertEquals(0, x &= (x<<x));
-  assertEquals(0, x ^= (x-((2969023660.5619783)/x)));
-  assertEquals(0, x *= x);
-  assertEquals(NaN, x %= (x/(((x-x)/((tmp = -1622970458.3812745, tmp)-(1626134522)))&((((((tmp = 1384729039.4149384, tmp)^(x%(tmp = -2736365959, tmp)))+((-1465172172)%x))>>(tmp = -1839184810.2603343, tmp))^(((tmp = 1756918419, tmp)>>>(x+(x%(tmp = -2011122996.9794662, tmp))))<<(-3026600748.902623)))*((tmp = -2040286580, tmp)>>(-2899217430.655154))))));
-  assertEquals(0, x >>>= (tmp = 2100066003.3046467, tmp));
-  assertEquals(1362012169, x ^= (tmp = 1362012169, tmp));
-  assertEquals(1476312683, x |= ((457898409)>>>(-3079768830.723079)));
-  assertEquals(1441711, x >>>= (905040778.7770994));
-  assertEquals(2078530607521, x *= x);
-  assertEquals(-208193103, x |= ((tmp = -241750000, tmp)^x));
-  assertEquals(745036378, x ^= (((tmp = -1737151062.4726632, tmp)<<x)|(tmp = -1900321813, tmp)));
-  assertEquals(1744830464, x <<= x);
-  assertEquals(212992, x >>>= ((1210741037)-(x-(x>>>((x^(-1273817997.0036907))+((2401915056.5471)%(x<<(tmp = 1696738364.277438, tmp))))))));
-  assertEquals(0.0001604311565639742, x /= (1327622418));
-  assertEquals(0, x <<= (tmp = 166631979.34529006, tmp));
-  assertEquals(0, x *= ((((tmp = 657814984, tmp)/(((-831055031)>>>(1531978379.1768064))|((tmp = 2470027754.302619, tmp)^(-223467597))))/(tmp = 1678697269.468965, tmp))&(tmp = -1756260071.4360774, tmp)));
-  assertEquals(-2049375053, x ^= (tmp = -2049375053, tmp));
-  assertEquals(-1879109889, x |= (tmp = -1963586818.0436726, tmp));
-  assertEquals(718239919, x ^= (tmp = -1523550640.1925273, tmp));
-  assertEquals(-1361085185, x |= (-1939964707));
-  assertEquals(2, x >>>= (1864136030.7395325));
-  assertEquals(0.794648722849246, x %= ((-668830999)*(((-2227700170.7193384)%(x^(x>>>x)))/(tmp = 399149892, tmp))));
-  assertEquals(0, x >>= x);
-  assertEquals(0, x *= x);
-  assertEquals(0, x &= ((tmp = -2389008496.5948563, tmp)|((((tmp = -2635919193.905919, tmp)*((-64464127)<<(2136112830.1317358)))>>((184057979)*(-1204959085.8362718)))>>>(-442946870.3341484))));
-  assertEquals(-243793920, x -= ((tmp = 3002998032, tmp)<<((537875759)<<x)));
-  assertEquals(0, x -= x);
-  assertEquals(0, x *= ((((66852616.82442963)/((((x^x)&(2975318321.223734))+(((tmp = -1388210811.1249495, tmp)^((((-680567297.7620237)%(x-(tmp = -672906716.4672911, tmp)))-x)*(tmp = -1452125821.0132627, tmp)))*(((2770387154.5427895)%x)%x)))-x))<<((-1481832432.924325)>>(tmp = 3109693867, tmp)))>>>(x/(((((((tmp = 928294418, tmp)^(((-1018314535)/(tmp = -3167523001, tmp))%((((((tmp = -1639338126, tmp)-(tmp = -2613558829, tmp))&x)/x)%(tmp = 513624872, tmp))/((-520660667)&x))))*(2620452414))^((tmp = 2337189239.5949326, tmp)*(3200887846.7954993)))>>>((tmp = 1173330667, tmp)^x))<<x)>>(((tmp = -2475534594.982338, tmp)*x)|x)))));
-  assertEquals(0, x /= (2520915286));
-  assertEquals(0, x &= x);
-  assertEquals(0, x >>= (-1908119327));
-  assertEquals(0, x >>>= (tmp = 549007635, tmp));
-  assertEquals(0, x >>= (-994747873.8117285));
-  assertEquals(0, x <<= ((((x>>>((-3084793026.846681)%((1107295502)&(tmp = -296613957.8133817, tmp))))&((19637717.166736007)/(x+x)))+x)/(-2479724242)));
-  assertEquals(-695401420, x += (-695401420));
-  assertEquals(-695401394, x += (x>>>(tmp = 2340097307.6556053, tmp)));
-  assertEquals(-555745552, x -= (x|(-483851950.68644)));
-  assertEquals(-17825792, x <<= x);
-  assertEquals(-17825792, x >>= x);
-  assertEquals(-17, x %= ((tmp = 1799361095, tmp)|((x>>(((-1201252592)<<((((543273288)+(-2859945716.606924))*x)<<((-3030193601)<<(3081129914.9217644))))|((1471431587.981769)>>(-246180750))))|(((tmp = -2689251055.1605787, tmp)>>x)&(((2131333169)^x)-((tmp = -951555489, tmp)/x))))));
-  assertEquals(-8912896, x <<= (1146444211));
-  assertEquals(2854567584, x += (tmp = 2863480480, tmp));
-  assertEquals(426232502.24151134, x %= (1214167540.8792443));
-  assertEquals(1806802048, x ^= (-2368317898));
-  assertEquals(432537600, x <<= (tmp = 2831272652.589364, tmp));
-  assertEquals(432537600, x %= (((1713810619.3880467)-x)&((-2853023009.553296)&(tmp = -3158798098.3355417, tmp))));
-  assertEquals(-509804066, x += (tmp = -942341666, tmp));
-  assertEquals(-509804066, x %= (-732349220));
-  assertEquals(259900185710132350, x *= x);
-  assertEquals(711598501.7021885, x %= ((tmp = 2020395586.2280731, tmp)-(tmp = 3031459563.1386633, tmp)));
-  assertEquals(711598503.0618857, x += ((tmp = 967558548.4141241, tmp)/x));
-  assertEquals(711598503, x &= x);
-  assertEquals(711598503, x ^= (((((1609355669.1963444)+((((tmp = -2660082403.258437, tmp)+(tmp = -235367868, tmp))&(x/x))*((-2595932186.69466)|((tmp = -3039202860, tmp)<<x))))>>>(-951354869))-((tmp = -691482949.6335375, tmp)/(tmp = -1735502400, tmp)))/(tmp = 798440377, tmp)));
-  assertEquals(558262613882868500, x *= (784519095.4299527));
-  assertEquals(558262611968479000, x -= ((((tmp = 1039039153.4026555, tmp)/(-3138845051.6240187))*(tmp = 633557994, tmp))&(1981507217)));
-  assertEquals(1170427648, x |= ((x>>((((-1086327124)%((tmp = -1818798806.368613, tmp)^(tmp = 2183576654.9959817, tmp)))>>x)&((((((tmp = 1315985464.0330539, tmp)&(2774283689.333836))%x)*((2722693772.8994813)&(tmp = -2720671984.945404, tmp)))^(tmp = -76808019, tmp))<<((tmp = 685037799.2336662, tmp)^((tmp = 1057250849, tmp)&(tmp = 1469205111.2989025, tmp))))))+(x*(((tmp = 448288818.47173154, tmp)-(-2527606231))-((8387088.402292728)>>x)))));
-  assertEquals(558, x >>>= (tmp = 2732701109, tmp));
-  assertEquals(558, x &= x);
-  assertEquals(-0.00015855057024653912, x /= ((x+(((tmp = -1963815633, tmp)-(x>>x))-((x|x)>>x)))/x));
-  assertEquals(1.3458861596445712e-13, x /= (-1178038492.4116466));
-  assertEquals(0, x <<= (-104550232));
-  assertEquals(0, x >>>= (x>>(tmp = -255275244.12613606, tmp)));
-  assertEquals(0, x >>= x);
-  assertEquals(375, x |= ((1576819294.6991196)>>>(-2570246122)));
-  assertEquals(96000, x <<= ((2252913843.0150948)>>>(-49239716)));
-  assertEquals(6144000, x <<= ((((tmp = -2478967279, tmp)&((x%((tmp = -1705332610.8018858, tmp)+(x+(tmp = 590766349, tmp))))<<(tmp = 1759375933, tmp)))+(-2024465658.849834))&(1564539207.3650014)));
-  assertEquals(-1149239296, x <<= (1862803657.7241006));
-  assertEquals(-9, x >>= (((tmp = 463306384.05696774, tmp)^x)|((x>>((((-2098070856.799663)<<((-2054870274.9012866)<<(((-2582579691)/(829257170.0266814))<<(((((tmp = -1753535573.7074275, tmp)<<((x>>(-197886116))%((2487188445)%(tmp = 2465391564.873364, tmp))))&(((tmp = -500069832, tmp)&(tmp = 3016637032, tmp))&((tmp = 2525942628, tmp)|((((-920996215)|x)^((((tmp = -687548533.419106, tmp)&(1423222636.058937))<<((tmp = -1096532228, tmp)>>((((tmp = -3124481449.2740726, tmp)^(tmp = 2724328271.808975, tmp))>>x)*x)))+(-1661789589.5808442)))+(((x*(tmp = -1224371664.9549093, tmp))^((tmp = 3202970043, tmp)^x))/(tmp = 131494054.58501709, tmp))))))|(((tmp = -1654136720, tmp)<<x)>>((1652979932.362416)-(tmp = -863732721, tmp))))^(-113307998)))))^(-90820449.91417909))*((tmp = 641519890, tmp)-((((x<<(tmp = 2349936514.071881, tmp))*(2324420443.587892))^x)%(x<<((tmp = -1838473742, tmp)/(((-3154172718.4274178)-x)+x)))))))|(x>>>((tmp = 2096024376.4308293, tmp)<<x)))));
-  assertEquals(81, x *= x);
-  assertEquals(81, x &= x);
-  assertEquals(81, x %= (tmp = 2223962994, tmp));
-  assertEquals(81, x ^= ((x/(((-1606183420.099584)|(-1242175583))&(((x|((tmp = 828718431.3311573, tmp)/(x>>x)))+(((-2207542725.4531174)^(x*x))*(tmp = 551575809.955105, tmp)))/x)))&((x>>x)&x)));
-  assertEquals(81, x %= (tmp = 279598358.6976975, tmp));
-  assertEquals(101.72338484518858, x -= (((tmp = 2452584495.44003, tmp)%((-1181192721)+(((x>>(((x&x)^x)+((x>>>((x+(-2472793823.57181))/(((2854104951)>>(-1208718359.6554642))>>>(1089411895.694705))))/(x|(-2821482890.1780205)))))^(-1786654551))/(-29404242.70557475))))/(((-4352531)<<((-1227287545)<<x))%(-2558589438))));
-  assertEquals(101.72338484518858, x %= (-943645643));
-  assertEquals(0, x -= x);
-  assertEquals(0, x >>>= (-2440404084));
-  assertEquals(0, x >>= (tmp = 1029680958.405923, tmp));
-  assertEquals(0, x >>>= (1213820208.7204895));
-  assertEquals(-0, x /= (tmp = -103093683, tmp));
-  assertEquals(0, x >>>= (-2098144813));
-  assertEquals(-0, x /= (((-3087283334)+(((tmp = -3129028112.6859293, tmp)%(tmp = 2413829931.1605015, tmp))-(2578195237.8071446)))|x));
-  assertEquals(-15, x |= ((((-178926550.92823577)>>>(-965071271))^((tmp = -484633724.7237625, tmp)-(tmp = 473098919.1486404, tmp)))>>((-2264998310.203265)%(tmp = -499034672, tmp))));
-  assertEquals(0, x ^= x);
-  assertEquals(0, x >>= (((-3207915976.698118)<<(tmp = 2347058630, tmp))|(tmp = -2396250098.559627, tmp)));
-  assertEquals(NaN, x %= x);
-  assertEquals(NaN, x *= (621843222));
-  assertEquals(0, x >>= (((-2409032228.7238913)*x)-(tmp = -887793239, tmp)));
-  assertEquals(NaN, x /= x);
-  assertEquals(1193017666, x ^= (tmp = 1193017666, tmp));
-  assertEquals(3.5844761899682753, x /= (tmp = 332829011.206393, tmp));
-  assertEquals(-888572929, x |= (((tmp = 1032409228, tmp)+(tmp = -1920982163.7853453, tmp))+x));
-  assertEquals(-1817051951333455600, x *= (((-1506265102)^(tmp = -775881816, tmp))-(tmp = -32116372.59181881, tmp)));
-  assertEquals(-1638479616, x |= x);
-  assertEquals(-114489, x %= (((tmp = -247137297.37866855, tmp)>>>((((((-322805409)-x)^x)>>((((((((x>>>(tmp = -900610424.7148039, tmp))/(-1155208489.6240904))|((-2874045803)|(tmp = 3050499811, tmp)))+(x/((tmp = -613902712, tmp)^((-982142626.2892077)*((((tmp = -3201753245.6026397, tmp)|((1739238762.0423079)^x))/(243217629.47237313))^((tmp = -11944405.987132788, tmp)/(tmp = 2054031985.633406, tmp)))))))*(tmp = 2696108952.450961, tmp))*x)>>>(tmp = 3058430643.0660386, tmp))>>(x<<x)))>>(-984468302.7450335))%((tmp = 1302320585.246251, tmp)>>>x)))%(tmp = -2436842285.8208156, tmp)));
-  assertEquals(2047, x >>>= (2380161237));
-  assertEquals(0, x >>= x);
-  assertEquals(0, x &= (tmp = 980821012.975836, tmp));
-  assertEquals(-1090535537, x -= ((-3064511503.1214876)&((tmp = -2598316939.163751, tmp)<<((tmp = -969452391.8925576, tmp)*x))));
-  assertEquals(-2181071074, x += x);
-  assertEquals(1, x >>>= ((2902525386.449062)>>x));
-  assertEquals(1, x += (x&(tmp = -2643758684.6636515, tmp)));
-  assertEquals(1, x %= ((tmp = -2646526891.7004848, tmp)/x));
-  assertEquals(448735695.7888887, x -= (tmp = -448735694.7888887, tmp));
-  assertEquals(1, x /= x);
-  assertEquals(1, x >>= ((-480385726)<<(2641021142)));
-  assertEquals(1, x %= (375099107.9200462));
-  assertEquals(1, x >>= (((x&((tmp = -2402469116.9903326, tmp)%(tmp = -2862459555.860298, tmp)))*(tmp = -2834162871.0586414, tmp))%(((x>>>(tmp = 721589907.5073895, tmp))*(x^x))%(((tmp = 2844611489.231776, tmp)^((983556913)&(906035409.6693488)))^(x>>>(1239322375))))));
-  assertEquals(268435456, x <<= (tmp = 178807644.80966163, tmp));
-  assertEquals(44, x %= ((tmp = 2527026779.081539, tmp)>>>(2736129559)));
-  assertEquals(88, x += x);
-  assertEquals(0, x >>>= x);
-  assertEquals(0, x -= x);
-  assertEquals(-1523121602, x |= (2771845694));
-  assertEquals(-2, x >>= x);
-  assertEquals(-4, x += x);
-  assertEquals(-256, x <<= (((2522793132.8616533)>>(tmp = 77232772.94058788, tmp))+(3118669244.49152)));
-  assertEquals(4294967040, x >>>= x);
-  assertEquals(-256, x &= x);
-  assertEquals(1278370155.835435, x -= (-1278370411.835435));
-  assertEquals(-3.488228054921667, x /= (tmp = -366481243.6881058, tmp));
-  assertEquals(1.162742684973889, x /= ((x|(((((2404819175.562809)*(tmp = -2524589506, tmp))&(tmp = -675727145, tmp))>>>(x*x))&((-413250006)<<(tmp = 2408322715, tmp))))|((2940367603)>>>x)));
-  assertEquals(0, x >>>= ((2513665793)-(tmp = 1249857454.3367786, tmp)));
-  assertEquals(0, x ^= x);
-  assertEquals(0, x ^= x);
-  assertEquals(1989998348.6336238, x -= (-1989998348.6336238));
-  assertEquals(903237918.986834, x %= (1086760429.6467898));
-  assertEquals(-4.4185765232981975, x /= (-204418304));
-  assertEquals(1471621914, x ^= (tmp = -1471621914.1771696, tmp));
-  assertEquals(1471621914, x |= ((((((x<<(tmp = -2676407394.536844, tmp))%(((343324258)+(x/(x>>(((-221193011)>>>x)|x))))>>(((-2737713893)^((tmp = -49214797.00735545, tmp)+((-2818106123.172874)/(tmp = -2361786565.3028684, tmp))))<<(1859353297.6355076))))*(tmp = -751970685, tmp))|((tmp = 2502717391.425871, tmp)/(tmp = -2647169430, tmp)))*((tmp = -1647567294, tmp)&(((tmp = 1819557651, tmp)/x)>>((((-3073469753)/x)-(((tmp = -1973810496.6407511, tmp)&((x-(x+(tmp = -2986851659, tmp)))>>>(tmp = -2226975699, tmp)))|(418770782.142766)))<<x))))*(((((tmp = 125466732, tmp)/((((1453655756.398259)|(((874792086.7064595)-(194880772.91499102))>>>x))%(x<<(tmp = -1445557137, tmp)))<<x))>>>(tmp = -1953751906, tmp))/((tmp = -2140573172.2979035, tmp)*((-108581964)^x)))|(-481484013.0393069))));
-  assertEquals(1454179065, x += ((tmp = 947147038.2829313, tmp)|(tmp = -154822975.3629098, tmp)));
-  assertEquals(1, x /= x);
-  assertEquals(1, x %= ((((((tmp = -2262250297.991866, tmp)-(tmp = 481953960, tmp))/(1629215187.6020458))|(2515244216))>>>((tmp = -3040594752.2184515, tmp)-(tmp = -1116041279, tmp)))^(((-182133502)-(1065160192.6609197))+(((((-1850040207)^(tmp = -1570328610, tmp))^(tmp = 20542725.09256518, tmp))*x)|(2386866629)))));
-  assertEquals(1, x &= (2889186303));
-  assertEquals(0, x >>= (((-1323093107.050538)>>(x%x))-(((((((-1736522840)+(tmp = -2623890690.8318863, tmp))*(959395040.5565329))*(233734920))<<((x+(x%((tmp = -2370717284.4370327, tmp)%(tmp = 2109311949, tmp))))-(tmp = -1005532894, tmp)))|(861703605))>>>((2399820772)/x))));
-  assertEquals(0, x >>= x);
-  assertEquals(57233408, x |= ((tmp = 2655923764.4179816, tmp)*(-1353634624.3025436)));
-  assertEquals(997939728, x |= (980552208.9005274));
-  assertEquals(1859642592476610800, x *= (1863481872));
-  assertEquals(-977190656, x <<= x);
-  assertEquals(4.378357529141239e+26, x *= ((((x/(((tmp = 2429520991, tmp)/(x/(tmp = 784592802, tmp)))-(tmp = -2704781982, tmp)))*(tmp = -2161015768.2322354, tmp))&((((-3164868762)>>(tmp = 2390893153.32907, tmp))^x)>>(-2422626718.322538)))*(tmp = 278291869, tmp)));
-  assertEquals(4.378357529141239e+26, x -= (1710777896.992369));
-  assertEquals(0, x &= (((((tmp = -2532956158.400033, tmp)|((2195255831.279001)|(1051047432)))|(-1628591858))|(tmp = -2042607521.947963, tmp))>>((-1471225208)/(((-133621318)>>(1980416325.7358408))*((1741069593.1036062)-(x|(2133911581.991011)))))));
-  assertEquals(-0, x /= (-656083507));
-  assertEquals(NaN, x += ((tmp = -1071410982.2789869, tmp)%x));
-  assertEquals(NaN, x *= (tmp = -1513535145.3146675, tmp));
-  assertEquals(0, x >>= ((2831245247.5267224)>>(x<<((x+(((3068824580.7922907)|(1708295544.275714))*((tmp = -1662930228.1170444, tmp)-(((tmp = 1979994889, tmp)<<(tmp = -1826911988, tmp))&((x/(x<<(1909384611.043981)))+(1958052414.7139997))))))<<(tmp = 2481909816.56558, tmp)))));
-  assertEquals(0, x *= (((tmp = -2979739958.1614842, tmp)&x)+x));
-  assertEquals(-0, x *= ((-332769864.50313234)^x));
-  assertEquals(0, x >>= ((((689018886.1436445)+(tmp = -2819546038.620694, tmp))|(((tmp = -1459669934.9066005, tmp)|x)/x))<<(((tmp = 2640360389, tmp)/((x%((-1947492547.9056122)%((1487212416.2083092)-(-1751984129))))^x))%(tmp = 2666842881, tmp))));
-  assertEquals(-1801321460, x |= (tmp = 2493645836, tmp));
-  assertEquals(-1801321460, x %= (2400405136));
-  assertEquals(-2905399858195810300, x *= (tmp = 1612926911, tmp));
-  assertEquals(-2905399858195810300, x -= (x>>(tmp = 1603910263.9593458, tmp)));
-  assertEquals(-238798848, x &= ((tmp = -2638646212.767516, tmp)/(((tmp = 1755616291.436998, tmp)>>>(tmp = 1083349775, tmp))-(x%(((tmp = 1728859105.53634, tmp)^(1931522619.0403612))/(tmp = 712460587.0025489, tmp))))));
-  assertEquals(-2363873607.2302856, x += (-2125074759.230286));
-  assertEquals(1712665, x &= (((117229515)>>>(((1707090894.1915488)>>>((-1696008695)>>(((-1045367326.7522249)<<(tmp = -209334716, tmp))-x)))|(-1707909786.080653)))%(1260761349.172689)));
-  assertEquals(1073741824, x <<= (tmp = -289437762.34742975, tmp));
-  assertEquals(1073741824, x &= (tmp = 2079141140, tmp));
-  assertEquals(0, x <<= ((x^(-3139646716.1615124))-(((-362323071.74237394)|(tmp = 2989896849, tmp))*(tmp = -218217991, tmp))));
-  assertEquals(0, x &= (tmp = -1476835288.425903, tmp));
-  assertEquals(0, x >>>= (tmp = 61945262.70868635, tmp));
-  assertEquals(0, x ^= x);
-  assertEquals(-2735263498.7189775, x -= (2735263498.7189775));
-  assertEquals(-1182289920, x <<= (x+x));
-  assertEquals(-1182289580, x ^= ((2858446263.2258)>>>(2387398039.6273785)));
-  assertEquals(696693056, x &= ((2178665823)*(-51848583)));
-  assertEquals(1652555776, x <<= (((tmp = 2943916975, tmp)-((-1544273901)>>(-1671503106.2896929)))|x));
-  assertEquals(6455296, x >>>= (tmp = 1492638248.675439, tmp));
-  assertEquals(2097152, x &= (((x|x)*(2873891571.7000637))^((2165264807)+(tmp = 451721563, tmp))));
-  assertEquals(2097152, x %= (tmp = 1089484582.1455994, tmp));
-  assertEquals(2097152, x <<= x);
-  assertEquals(2097152, x &= ((tmp = 119096343.4032247, tmp)^((-1947874541)*x)));
-  assertEquals(0, x &= (tmp = 2363070677, tmp));
-  assertEquals(0, x &= ((tmp = -1897325383, tmp)>>>((2368480527)>>>((tmp = 1837528979, tmp)*(-1838904077)))));
-  assertEquals(-1898659416, x ^= (-1898659416.1125412));
-  assertEquals(-725506048, x <<= x);
-  assertEquals(1392943104, x <<= (295287938.9104482));
-  assertEquals(-63620329, x ^= ((tmp = -3175925826.5573816, tmp)-(tmp = 2474613927, tmp)));
-  assertEquals(-1135111726, x -= ((tmp = -1133259081, tmp)^(((tmp = -742228219, tmp)>>((-7801909.587711811)%((tmp = -642758873, tmp)+(tmp = 2893927824.6036444, tmp))))^((tmp = -2145465178.9142997, tmp)+x))));
-  assertEquals(0, x ^= x);
-  assertEquals(660714589, x |= (660714589));
-  assertEquals(660714676, x ^= ((-376720042.8047826)>>>(2196220344)));
-  assertEquals(660714676, x |= ((((((((x<<(-1140465568))-(tmp = -1648489774.1573918, tmp))%(((tmp = -2955505390.573639, tmp)*x)<<((((tmp = -1769375963, tmp)*(tmp = -440619797, tmp))&((tmp = 1904284066, tmp)%(-2420852665.0629807)))+(-324601009.2063596))))>>(tmp = 2317210783.9757776, tmp))^((tmp = 750057067.4541628, tmp)^(tmp = -1391814244.7286487, tmp)))>>((344544658.6054913)%((tmp = -1508630423.218488, tmp)&(tmp = 1918909238.2974637, tmp))))>>((-647746783.685822)&(tmp = 2444858958.3595476, tmp)))&x));
-  assertEquals(-962337195, x ^= (tmp = -507358495.30825853, tmp));
-  assertEquals(-182008925.58535767, x %= (tmp = -195082067.35366058, tmp));
-  assertEquals(502070, x >>>= (tmp = 1459732237.1447744, tmp));
-  assertEquals(-2391009930.7235765, x -= (tmp = 2391512000.7235765, tmp));
-  assertEquals(1568669696, x <<= x);
-  assertEquals(0, x <<= (tmp = -571056688.2717848, tmp));
-  assertEquals(1770376226, x ^= (tmp = 1770376226.0584736, tmp));
-  assertEquals(0, x ^= x);
-  assertEquals(0, x &= ((((x<<x)>>>x)|x)|(((tmp = -2141573723, tmp)^x)|(64299956))));
-  assertEquals(0, x ^= x);
-  assertEquals(0, x &= x);
-  assertEquals(0, x <<= (1106060336.7362857));
-  assertEquals(-0, x /= (x|(tmp = 2760823963, tmp)));
-  assertEquals(0, x <<= ((-2436225757)|(-1800598694.4062433)));
-  assertEquals(0, x >>>= ((-728332508.9870625)<<x));
-  assertEquals(-173377680, x ^= ((tmp = -173377680, tmp)%(tmp = -2843994892, tmp)));
-  assertEquals(-173377680, x |= ((((-819217898)&(tmp = -1321650255, tmp))&(x+((x^x)<<((1700753064)>>((((((-1038799327)>>((782275464)^x))-(tmp = -2113814317.8539028, tmp))>>(2143804838))&x)-((2970418921)/(-3073015285.6587048)))))))&((-1759593079.4077306)%((1699128805)-((tmp = -467193967, tmp)&(((2225788267.3466334)*(((2687946762.5504274)+x)>>>x))<<(-1853556066.880512)))))));
-  assertEquals(-0.5520657226957338, x /= ((tmp = -755493878, tmp)&(tmp = 918108389, tmp)));
-  assertEquals(0.30477656217556287, x *= x);
-  assertEquals(0, x &= ((tmp = -2746007517, tmp)<<(2749629340)));
-  assertEquals(0, x ^= ((x%(tmp = 1683077876, tmp))%(-162706778)));
-  assertEquals(0, x *= (tmp = 10203423, tmp));
-  assertEquals(119043212.1461842, x += (tmp = 119043212.1461842, tmp));
-  assertEquals(587202560, x <<= (tmp = 658697910.7051642, tmp));
-  assertEquals(-138689730, x |= (x-(tmp = 1296317634.5661907, tmp)));
-  assertEquals(-138663011, x -= ((-1751010109.5506423)>>(152829872)));
-  assertEquals(-138663011, x %= (-1266200468));
-  assertEquals(-138663011, x &= (x|((tmp = -571277275.622529, tmp)<<x)));
-  assertEquals(-138663011, x >>= ((971259905.1265712)*(tmp = 2203764981, tmp)));
-  assertEquals(-138663011, x %= (-904715829));
-  assertEquals(-138663011, x |= ((tmp = -2823047885.283391, tmp)>>>(((tmp = 533217000, tmp)|(650754598.7836078))|(-1475565890))));
-  assertEquals(-1610612736, x <<= x);
-  assertEquals(-1610612736, x &= x);
-  assertEquals(163840, x >>>= (-188885010));
-  assertEquals(-1224224814, x |= (tmp = 3070742482, tmp));
-  assertEquals(1498726395213334500, x *= x);
-  assertEquals(1723591210, x |= ((tmp = 615164458, tmp)|x));
-  assertEquals(1721910480, x ^= (x>>>x));
-  assertEquals(4505284605.764313, x -= (tmp = -2783374125.7643127, tmp));
-  assertEquals(-9504912393868483000, x *= (((tmp = 2896651872, tmp)<<(-2896385692.9017262))&(((((tmp = -2081179810.20238, tmp)|(tmp = -2484863999, tmp))>>((tmp = 1560885110.2665749, tmp)/(((tmp = 934324123.4289343, tmp)<<((tmp = -1591614157.0496385, tmp)+x))/(((x%(((tmp = 1672629986.8055913, tmp)%x)>>(tmp = 2116315086.2559657, tmp)))/(((-2687682697.5806303)>>x)/(-2034391222.5029132)))%(x-((((((tmp = 2598594967, tmp)/(((((((2950032233)%x)/x)^(tmp = -2126753451.3732262, tmp))<<(tmp = -3019113473, tmp))+(tmp = -2021220129.2320697, tmp))%((((-587645875.4666483)>>(((((x+x)+x)&(tmp = 533801785, tmp))|x)-((tmp = -2224808495.678903, tmp)/(1501942300))))>>>(-2558947646))>>((2798508249.020792)>>>x))))>>>((1060584557)/((((((((x&x)|(1426725365))>>>(tmp = 1500508838, tmp))>>(-1328705938))*((tmp = -2288009425.598777, tmp)>>>(((2586897285.9759064)%((-1605651559.2122297)>>>(tmp = 1936736684.4887302, tmp)))+((tmp = 2316261040, tmp)^(570340750.353874)))))&(x^((tmp = -2266524143, tmp)-(tmp = 2358520476, tmp))))+(tmp = 1449254900.9222453, tmp))%((-100598196)%((tmp = -2985318242.153491, tmp)>>((620722274.4565848)>>(871118975)))))))<<x)*(tmp = -1287065606.4143271, tmp))>>>(1038059916.2438471)))))))+((x/(-276990308.1264961))&(tmp = 2471016351.2195315, tmp)))|(((((tmp = -1288792769.3210807, tmp)+((tmp = -641817194, tmp)*(x<<(((-1933817364)>>(((tmp = 2084673536, tmp)|x)&x))&(tmp = -2752464480, tmp)))))%((796026752)*x))+(((tmp = -3083359669, tmp)|x)-((715303522)|(tmp = 181297266, tmp))))*(-1691520182.3207517)))));
-  assertEquals(0, x <<= (-2322389800));
-  assertEquals(0, x *= (tmp = 3188682235, tmp));
-  assertEquals(0, x |= (x>>>((tmp = -2729325231.8288336, tmp)^((-393497076.96012783)*(x/(tmp = -2198942459.9466457, tmp))))));
-  assertEquals(0, x ^= x);
-  assertEquals(0, x %= (2835024997.4447937));
-  assertEquals(0, x <<= x);
-  assertEquals(0, x >>= (tmp = 1109824126, tmp));
-  assertEquals(0, x <<= (3013043386));
-  assertEquals(206825782.74659085, x -= (-206825782.74659085));
-  assertEquals(-645346761227699500, x *= (-3120243292));
-  assertEquals(6825462, x >>= ((tmp = 1457908135, tmp)<<x));
-  assertEquals(-612366097.9189918, x -= (619191559.9189918));
-  assertEquals(-612306090.9189918, x -= ((2328676543.893506)>>x));
-  assertEquals(0, x ^= (x>>(((x>>>(1856200611.2269292))&(tmp = 2003217473, tmp))%((((((-107135673)+(((3062079356.170611)<<(tmp = -676928983, tmp))>>((tmp = -1487074941.2638814, tmp)|((-1601614031)/(1317006144.5025365)))))+x)*(((1163301641)>>>(448796567))/((x%((tmp = 72293197.34410787, tmp)+(-2304112723)))/((455610361)%(-2799431520)))))>>>(-217305041.09432888))<<(x-(tmp = -2168353649, tmp))))));
-  assertEquals(0, x >>= x);
-  assertEquals(-Infinity, x -= (((-1651597599.8950624)+(1780404320))/x));
-  assertEquals(0, x <<= (tmp = 2246420272.4321294, tmp));
-  assertEquals(0, x *= ((2793605382)-(tmp = -272299011, tmp)));
-  assertEquals(0, x *= x);
-  assertEquals(0, x <<= x);
-  assertEquals(0, x >>= (tmp = 2556413090, tmp));
-  assertEquals(0, x >>= ((tmp = -1784710085, tmp)%x));
-  assertEquals(0, x %= (tmp = -1929880813, tmp));
-  assertEquals(0, x *= (2586983368));
-  assertEquals(0, x &= x);
-  assertEquals(0, x <<= (-2144588807));
-  assertEquals(0, x ^= ((x<<(((((((-596537598)+((x-(((((((tmp = -3179604796, tmp)/((tmp = 1156725365.3543215, tmp)>>>(tmp = -2762144319, tmp)))%(x<<x))&((tmp = 1750241928.1271567, tmp)&(x/((tmp = 1781306819, tmp)|x))))+((((2893068644)/((tmp = -576164593.9720252, tmp)<<((2724671.48995471)&(tmp = -573132475, tmp))))%(tmp = -1355625108, tmp))&(tmp = -302869512.5880568, tmp)))+x)<<x))>>((tmp = -2569172808, tmp)/x)))^x)-(tmp = -1174006275.2213159, tmp))&x)&(((((((-2303274799)>>(tmp = -814839320, tmp))/(tmp = 183887306.09810615, tmp))>>(((tmp = 1054106394.3704875, tmp)|x)>>>x))-(x-(tmp = 1313696830, tmp)))-((tmp = 2373274399.0742035, tmp)|((((tmp = -3163779539.4902935, tmp)*(tmp = -3056125181.726942, tmp))&(((x^(x^(x/((tmp = -576441696.6015451, tmp)<<(tmp = -26223719.920306206, tmp)))))>>(tmp = -2332835940, tmp))|((-146303509.41093707)&(tmp = -2676964025, tmp))))/((((x*(tmp = 1059918020, tmp))|((((2341797349)|(tmp = -744763805.1381104, tmp))<<x)+((2991320875.552578)^(2920702604.701831))))^(-1721756138))^(((tmp = -2794367554, tmp)>>((-2671235923.2097874)<<(x&((((tmp = -621472314.0859051, tmp)-(((x*x)+x)>>>((tmp = 1834038956, tmp)+x)))*x)^(tmp = -2090567586.321468, tmp)))))<<(321395210))))))>>>(tmp = -1207661719, tmp)))+(-2877264053.3805156)))/(x%(tmp = -2226991657.709366, tmp))));
-  assertEquals(0, x *= (tmp = 986904991.061398, tmp));
-  assertEquals(0, x -= (x%(650819306.6671969)));
-  assertEquals(0, x >>>= (905893666.2871252));
-  assertEquals(0, x += (((tmp = 2501942710.4804144, tmp)&x)/((tmp = -851080399.1751502, tmp)-(-1168623992))));
-  assertEquals(-0, x *= (tmp = -2014577821.4554045, tmp));
-  assertEquals(0, x &= (tmp = 1995246018, tmp));
-  assertEquals(0, x %= (1724355237.7031958));
-  assertEquals(-954696411, x += (((-2825222201)+(((1662353496.1795506)>>>(x-x))|(tmp = 225015046, tmp)))^(x&x)));
-  assertEquals(-2158427339993389800, x *= (2260852052.1539803));
-  assertEquals(19559, x >>>= (-862409169.4978967));
-  assertEquals(-0.000012241163878671237, x /= (x^(tmp = 2697144215.160239, tmp)));
-  assertEquals(0, x -= x);
-  assertEquals(1448177644, x |= (tmp = 1448177644.624848, tmp));
-  assertEquals(1448177644, x %= (((-1497553637.4976408)+(402228446))<<x));
-  assertEquals(2304640553, x -= (-856462909));
-  assertEquals(152436736, x &= ((766686903)*(((tmp = 660964683.1744609, tmp)|((((tmp = 297369746, tmp)-(x+((tmp = -2677127146, tmp)/x)))>>(((((((x%(x<<x))-(((((529254728)|((x|(-1407086127.6088922))&(tmp = -1968465008.5000398, tmp)))/(x%x))&((((-2761805265.92574)-x)*(x^(tmp = 110730179, tmp)))%((177220657.06030762)*(((2532585190.671373)/x)+(-1465143151)))))<<((tmp = -3008848338, tmp)<<(-2475597073))))|((-192996756.38619018)|((((1445996780)|(x>>>((((tmp = -2482370545.791443, tmp)*(tmp = -270543594, tmp))^x)*((1346780586)/(tmp = -625613363.885356, tmp)))))-(x<<(x/(-562307527))))&(-125701272))))*((x&x)%(tmp = 752963070, tmp)))>>>(tmp = 17419750.79086232, tmp))*x)^(x^((-157821212.04674292)-(tmp = 503849221.598824, tmp)))))-(tmp = 1479418449, tmp)))>>>((((((-78138548.2193842)<<(((2319032860.806689)-(tmp = -1564963892.5137577, tmp))>>>(-73673322.28957987)))<<((1797573493.3467085)*x))>>(tmp = 759994997, tmp))>>>(-1066441220))&(((((((tmp = 1972048857, tmp)*(((x&((-1347017320.0747669)>>>x))*(-2332716925.705054))%(-376976019.24362826)))>>>((tmp = -466479974, tmp)+x))&(-2282789473.3675604))|(((((((((269205423.7510414)-(tmp = 21919626.105656862, tmp))*((x-(tmp = -378670528, tmp))>>(tmp = -1045706598, tmp)))>>(tmp = -3062647341.234485, tmp))>>>x)|(tmp = -285399599.9386575, tmp))%(tmp = 2731214562, tmp))|((((tmp = 837093165.3438574, tmp)|(tmp = -2956931321, tmp))+((1871874558.3292787)<<((x|((tmp = -3169147427, tmp)%(((x^x)%(1479885041))%((1769991217)%(tmp = -1899472458, tmp)))))*(tmp = -837098563.71806, tmp))))>>(tmp = -1866722748, tmp)))-(2037734340.8345597)))>>((tmp = -1262019180.5332131, tmp)+(x*(1274173993.9800131))))*(tmp = 2336989321.855402, tmp))))));
-  assertEquals(4, x >>= (tmp = -2577728327, tmp));
-  assertEquals(16, x *= (x<<((2622323372.580596)*(tmp = -1947643367, tmp))));
-  assertEquals(33554432, x <<= (tmp = -2938370507, tmp));
-  assertEquals(-2399497018.987414, x -= (tmp = 2433051450.987414, tmp));
-  assertEquals(1, x /= x);
-  assertEquals(2, x <<= x);
-  assertEquals(0, x >>= (x&x));
-  assertEquals(0, x <<= x);
-}
-f();
diff --git a/deps/v8/test/mjsunit/object-define-property.js b/deps/v8/test/mjsunit/object-define-property.js
index bd104aaf0b..970a803349 100644
--- a/deps/v8/test/mjsunit/object-define-property.js
+++ b/deps/v8/test/mjsunit/object-define-property.js
@@ -1057,7 +1057,7 @@ assertEquals(999, o[999]);
 
 
 // Regression test: Bizzare behavior on non-strict arguments object.
-// TODO(mstarzinger): Tests disabled, see bug 2261
+// TODO(yangguo): Tests disabled, needs investigation!
 /*
 (function test(arg0) {
   // Here arguments[0] is a fast alias on arg0.
diff --git a/deps/v8/test/mjsunit/pixel-array-rounding.js b/deps/v8/test/mjsunit/pixel-array-rounding.js
index 0c307e62e5..0c307e62e5 100644..100755
--- a/deps/v8/test/mjsunit/pixel-array-rounding.js
+++ b/deps/v8/test/mjsunit/pixel-array-rounding.js
diff --git a/deps/v8/test/mjsunit/regexp-capture-3.js b/deps/v8/test/mjsunit/regexp-capture-3.js
index b676f01c2c..b676f01c2c 100644..100755
--- a/deps/v8/test/mjsunit/regexp-capture-3.js
+++ b/deps/v8/test/mjsunit/regexp-capture-3.js
diff --git a/deps/v8/test/mjsunit/regress/regress-1117.js b/deps/v8/test/mjsunit/regress/regress-1117.js
index b013a223ec..981a1b7a3f 100644
--- a/deps/v8/test/mjsunit/regress/regress-1117.js
+++ b/deps/v8/test/mjsunit/regress/regress-1117.js
@@ -25,11 +25,20 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+// Flags: --allow-natives-syntax
+
 // Test that we actually return the right value (-0) when we multiply
 // constant 0 with a negative integer.
 
 function foo(y) {return 0 * y; }
-for( var i = 0; i< 1000000; i++){
-  foo(42);
-}
 assertEquals(1/foo(-42), -Infinity);
+assertEquals(1/foo(-42), -Infinity);
+%OptimizeFunctionOnNextCall(foo);
+assertEquals(1/foo(-42), -Infinity);
+
+function bar(x) { return x * 0; }
+assertEquals(Infinity, 1/bar(5));
+assertEquals(Infinity, 1/bar(5));
+%OptimizeFunctionOnNextCall(bar);
+assertEquals(-Infinity, 1/bar(-5));
+
diff --git a/deps/v8/test/mjsunit/regress/regress-121407.js b/deps/v8/test/mjsunit/regress/regress-121407.js
index 25033fb525..4403708184 100644
--- a/deps/v8/test/mjsunit/regress/regress-121407.js
+++ b/deps/v8/test/mjsunit/regress/regress-121407.js
@@ -37,4 +37,4 @@ a[2000000] = 2000000;
 a.length=2000;
 for (var i = 0; i <= 256; i++) {
     a[i] = new Object();
-}
\ No newline at end of file
+}
diff --git a/deps/v8/test/mjsunit/regress/regress-143967.js b/deps/v8/test/mjsunit/regress/regress-143967.js
new file mode 100644
index 0000000000..7c12e67153
--- /dev/null
+++ b/deps/v8/test/mjsunit/regress/regress-143967.js
@@ -0,0 +1,34 @@
+// Copyright 2012 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Check that Accessors::FunctionGetPrototype traverses the prototype
+// chain correctly and doesn't get stuck.
+
+var functionWithoutProto = [].filter;
+var obj = Object.create(functionWithoutProto);
+functionWithoutProto.__proto__ = function() {};
+assertEquals(functionWithoutProto.prototype, obj.prototype);
diff --git a/deps/v8/test/mjsunit/regress/regress-1692.js b/deps/v8/test/mjsunit/regress/regress-1692.js
index 06bd66cf7f..32be87f989 100644
--- a/deps/v8/test/mjsunit/regress/regress-1692.js
+++ b/deps/v8/test/mjsunit/regress/regress-1692.js
@@ -82,7 +82,7 @@ var o = Object("string");
 // Non-string property on String object.
 o[10] = 42;
 assertTrue(o.propertyIsEnumerable(10));
-assertFalse(o.propertyIsEnumerable(0));
+assertTrue(o.propertyIsEnumerable(0));
 
 // Fast elements.
 var o = [1,2,3,4,5];
diff --git a/deps/v8/test/mjsunit/regress/regress-1969.js b/deps/v8/test/mjsunit/regress/regress-1969.js
deleted file mode 100644
index 2728c2cae7..0000000000
--- a/deps/v8/test/mjsunit/regress/regress-1969.js
+++ /dev/null
@@ -1,5045 +0,0 @@
-// Copyright 2012 the V8 project authors. All rights reserved.
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-//       notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-//       copyright notice, this list of conditions and the following
-//       disclaimer in the documentation and/or other materials provided
-//       with the distribution.
-//     * Neither the name of Google Inc. nor the names of its
-//       contributors may be used to endorse or promote products derived
-//       from this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// Flags: --allow-natives-syntax
-
-f();
-f();
-%OptimizeFunctionOnNextCall(f);
-var start = (new Date()).getTime();
-var array = f();
-var end = (new Date()).getTime();
-
-// Assert that recompiling and executing f() takes less than a second.
-assertTrue((end - start) < 1000);
-
-for (var i = 0; i < 5000; i++) assertEquals(0, array[i]);
-
-function f() {
-  var a = new Array(5000);
-  a[0]=0;
-  a[1]=0;
-  a[2]=0;
-  a[3]=0;
-  a[4]=0;
-  a[5]=0;
-  a[6]=0;
-  a[7]=0;
-  a[8]=0;
-  a[9]=0;
-  a[10]=0;
-  a[11]=0;
-  a[12]=0;
-  a[13]=0;
-  a[14]=0;
-  a[15]=0;
-  a[16]=0;
-  a[17]=0;
-  a[18]=0;
-  a[19]=0;
-  a[20]=0;
-  a[21]=0;
-  a[22]=0;
-  a[23]=0;
-  a[24]=0;
-  a[25]=0;
-  a[26]=0;
-  a[27]=0;
-  a[28]=0;
-  a[29]=0;
-  a[30]=0;
-  a[31]=0;
-  a[32]=0;
-  a[33]=0;
-  a[34]=0;
-  a[35]=0;
-  a[36]=0;
-  a[37]=0;
-  a[38]=0;
-  a[39]=0;
-  a[40]=0;
-  a[41]=0;
-  a[42]=0;
-  a[43]=0;
-  a[44]=0;
-  a[45]=0;
-  a[46]=0;
-  a[47]=0;
-  a[48]=0;
-  a[49]=0;
-  a[50]=0;
-  a[51]=0;
-  a[52]=0;
-  a[53]=0;
-  a[54]=0;
-  a[55]=0;
-  a[56]=0;
-  a[57]=0;
-  a[58]=0;
-  a[59]=0;
-  a[60]=0;
-  a[61]=0;
-  a[62]=0;
-  a[63]=0;
-  a[64]=0;
-  a[65]=0;
-  a[66]=0;
-  a[67]=0;
-  a[68]=0;
-  a[69]=0;
-  a[70]=0;
-  a[71]=0;
-  a[72]=0;
-  a[73]=0;
-  a[74]=0;
-  a[75]=0;
-  a[76]=0;
-  a[77]=0;
-  a[78]=0;
-  a[79]=0;
-  a[80]=0;
-  a[81]=0;
-  a[82]=0;
-  a[83]=0;
-  a[84]=0;
-  a[85]=0;
-  a[86]=0;
-  a[87]=0;
-  a[88]=0;
-  a[89]=0;
-  a[90]=0;
-  a[91]=0;
-  a[92]=0;
-  a[93]=0;
-  a[94]=0;
-  a[95]=0;
-  a[96]=0;
-  a[97]=0;
-  a[98]=0;
-  a[99]=0;
-  a[100]=0;
-  a[101]=0;
-  a[102]=0;
-  a[103]=0;
-  a[104]=0;
-  a[105]=0;
-  a[106]=0;
-  a[107]=0;
-  a[108]=0;
-  a[109]=0;
-  a[110]=0;
-  a[111]=0;
-  a[112]=0;
-  a[113]=0;
-  a[114]=0;
-  a[115]=0;
-  a[116]=0;
-  a[117]=0;
-  a[118]=0;
-  a[119]=0;
-  a[120]=0;
-  a[121]=0;
-  a[122]=0;
-  a[123]=0;
-  a[124]=0;
-  a[125]=0;
-  a[126]=0;
-  a[127]=0;
-  a[128]=0;
-  a[129]=0;
-  a[130]=0;
-  a[131]=0;
-  a[132]=0;
-  a[133]=0;
-  a[134]=0;
-  a[135]=0;
-  a[136]=0;
-  a[137]=0;
-  a[138]=0;
-  a[139]=0;
-  a[140]=0;
-  a[141]=0;
-  a[142]=0;
-  a[143]=0;
-  a[144]=0;
-  a[145]=0;
-  a[146]=0;
-  a[147]=0;
-  a[148]=0;
-  a[149]=0;
-  a[150]=0;
-  a[151]=0;
-  a[152]=0;
-  a[153]=0;
-  a[154]=0;
-  a[155]=0;
-  a[156]=0;
-  a[157]=0;
-  a[158]=0;
-  a[159]=0;
-  a[160]=0;
-  a[161]=0;
-  a[162]=0;
-  a[163]=0;
-  a[164]=0;
-  a[165]=0;
-  a[166]=0;
-  a[167]=0;
-  a[168]=0;
-  a[169]=0;
-  a[170]=0;
-  a[171]=0;
-  a[172]=0;
-  a[173]=0;
-  a[174]=0;
-  a[175]=0;
-  a[176]=0;
-  a[177]=0;
-  a[178]=0;
-  a[179]=0;
-  a[180]=0;
-  a[181]=0;
-  a[182]=0;
-  a[183]=0;
-  a[184]=0;
-  a[185]=0;
-  a[186]=0;
-  a[187]=0;
-  a[188]=0;
-  a[189]=0;
-  a[190]=0;
-  a[191]=0;
-  a[192]=0;
-  a[193]=0;
-  a[194]=0;
-  a[195]=0;
-  a[196]=0;
-  a[197]=0;
-  a[198]=0;
-  a[199]=0;
-  a[200]=0;
-  a[201]=0;
-  a[202]=0;
-  a[203]=0;
-  a[204]=0;
-  a[205]=0;
-  a[206]=0;
-  a[207]=0;
-  a[208]=0;
-  a[209]=0;
-  a[210]=0;
-  a[211]=0;
-  a[212]=0;
-  a[213]=0;
-  a[214]=0;
-  a[215]=0;
-  a[216]=0;
-  a[217]=0;
-  a[218]=0;
-  a[219]=0;
-  a[220]=0;
-  a[221]=0;
-  a[222]=0;
-  a[223]=0;
-  a[224]=0;
-  a[225]=0;
-  a[226]=0;
-  a[227]=0;
-  a[228]=0;
-  a[229]=0;
-  a[230]=0;
-  a[231]=0;
-  a[232]=0;
-  a[233]=0;
-  a[234]=0;
-  a[235]=0;
-  a[236]=0;
-  a[237]=0;
-  a[238]=0;
-  a[239]=0;
-  a[240]=0;
-  a[241]=0;
-  a[242]=0;
-  a[243]=0;
-  a[244]=0;
-  a[245]=0;
-  a[246]=0;
-  a[247]=0;
-  a[248]=0;
-  a[249]=0;
-  a[250]=0;
-  a[251]=0;
-  a[252]=0;
-  a[253]=0;
-  a[254]=0;
-  a[255]=0;
-  a[256]=0;
-  a[257]=0;
-  a[258]=0;
-  a[259]=0;
-  a[260]=0;
-  a[261]=0;
-  a[262]=0;
-  a[263]=0;
-  a[264]=0;
-  a[265]=0;
-  a[266]=0;
-  a[267]=0;
-  a[268]=0;
-  a[269]=0;
-  a[270]=0;
-  a[271]=0;
-  a[272]=0;
-  a[273]=0;
-  a[274]=0;
-  a[275]=0;
-  a[276]=0;
-  a[277]=0;
-  a[278]=0;
-  a[279]=0;
-  a[280]=0;
-  a[281]=0;
-  a[282]=0;
-  a[283]=0;
-  a[284]=0;
-  a[285]=0;
-  a[286]=0;
-  a[287]=0;
-  a[288]=0;
-  a[289]=0;
-  a[290]=0;
-  a[291]=0;
-  a[292]=0;
-  a[293]=0;
-  a[294]=0;
-  a[295]=0;
-  a[296]=0;
-  a[297]=0;
-  a[298]=0;
-  a[299]=0;
-  a[300]=0;
-  a[301]=0;
-  a[302]=0;
-  a[303]=0;
-  a[304]=0;
-  a[305]=0;
-  a[306]=0;
-  a[307]=0;
-  a[308]=0;
-  a[309]=0;
-  a[310]=0;
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-  a[4828]=0;
-  a[4829]=0;
-  a[4830]=0;
-  a[4831]=0;
-  a[4832]=0;
-  a[4833]=0;
-  a[4834]=0;
-  a[4835]=0;
-  a[4836]=0;
-  a[4837]=0;
-  a[4838]=0;
-  a[4839]=0;
-  a[4840]=0;
-  a[4841]=0;
-  a[4842]=0;
-  a[4843]=0;
-  a[4844]=0;
-  a[4845]=0;
-  a[4846]=0;
-  a[4847]=0;
-  a[4848]=0;
-  a[4849]=0;
-  a[4850]=0;
-  a[4851]=0;
-  a[4852]=0;
-  a[4853]=0;
-  a[4854]=0;
-  a[4855]=0;
-  a[4856]=0;
-  a[4857]=0;
-  a[4858]=0;
-  a[4859]=0;
-  a[4860]=0;
-  a[4861]=0;
-  a[4862]=0;
-  a[4863]=0;
-  a[4864]=0;
-  a[4865]=0;
-  a[4866]=0;
-  a[4867]=0;
-  a[4868]=0;
-  a[4869]=0;
-  a[4870]=0;
-  a[4871]=0;
-  a[4872]=0;
-  a[4873]=0;
-  a[4874]=0;
-  a[4875]=0;
-  a[4876]=0;
-  a[4877]=0;
-  a[4878]=0;
-  a[4879]=0;
-  a[4880]=0;
-  a[4881]=0;
-  a[4882]=0;
-  a[4883]=0;
-  a[4884]=0;
-  a[4885]=0;
-  a[4886]=0;
-  a[4887]=0;
-  a[4888]=0;
-  a[4889]=0;
-  a[4890]=0;
-  a[4891]=0;
-  a[4892]=0;
-  a[4893]=0;
-  a[4894]=0;
-  a[4895]=0;
-  a[4896]=0;
-  a[4897]=0;
-  a[4898]=0;
-  a[4899]=0;
-  a[4900]=0;
-  a[4901]=0;
-  a[4902]=0;
-  a[4903]=0;
-  a[4904]=0;
-  a[4905]=0;
-  a[4906]=0;
-  a[4907]=0;
-  a[4908]=0;
-  a[4909]=0;
-  a[4910]=0;
-  a[4911]=0;
-  a[4912]=0;
-  a[4913]=0;
-  a[4914]=0;
-  a[4915]=0;
-  a[4916]=0;
-  a[4917]=0;
-  a[4918]=0;
-  a[4919]=0;
-  a[4920]=0;
-  a[4921]=0;
-  a[4922]=0;
-  a[4923]=0;
-  a[4924]=0;
-  a[4925]=0;
-  a[4926]=0;
-  a[4927]=0;
-  a[4928]=0;
-  a[4929]=0;
-  a[4930]=0;
-  a[4931]=0;
-  a[4932]=0;
-  a[4933]=0;
-  a[4934]=0;
-  a[4935]=0;
-  a[4936]=0;
-  a[4937]=0;
-  a[4938]=0;
-  a[4939]=0;
-  a[4940]=0;
-  a[4941]=0;
-  a[4942]=0;
-  a[4943]=0;
-  a[4944]=0;
-  a[4945]=0;
-  a[4946]=0;
-  a[4947]=0;
-  a[4948]=0;
-  a[4949]=0;
-  a[4950]=0;
-  a[4951]=0;
-  a[4952]=0;
-  a[4953]=0;
-  a[4954]=0;
-  a[4955]=0;
-  a[4956]=0;
-  a[4957]=0;
-  a[4958]=0;
-  a[4959]=0;
-  a[4960]=0;
-  a[4961]=0;
-  a[4962]=0;
-  a[4963]=0;
-  a[4964]=0;
-  a[4965]=0;
-  a[4966]=0;
-  a[4967]=0;
-  a[4968]=0;
-  a[4969]=0;
-  a[4970]=0;
-  a[4971]=0;
-  a[4972]=0;
-  a[4973]=0;
-  a[4974]=0;
-  a[4975]=0;
-  a[4976]=0;
-  a[4977]=0;
-  a[4978]=0;
-  a[4979]=0;
-  a[4980]=0;
-  a[4981]=0;
-  a[4982]=0;
-  a[4983]=0;
-  a[4984]=0;
-  a[4985]=0;
-  a[4986]=0;
-  a[4987]=0;
-  a[4988]=0;
-  a[4989]=0;
-  a[4990]=0;
-  a[4991]=0;
-  a[4992]=0;
-  a[4993]=0;
-  a[4994]=0;
-  a[4995]=0;
-  a[4996]=0;
-  a[4997]=0;
-  a[4998]=0;
-  a[4999]=0;
-  return a;
-}
diff --git a/deps/v8/test/mjsunit/regress/regress-1980.js b/deps/v8/test/mjsunit/regress/regress-1980.js
index 49dfd063ba..d87ff45074 100644
--- a/deps/v8/test/mjsunit/regress/regress-1980.js
+++ b/deps/v8/test/mjsunit/regress/regress-1980.js
@@ -34,7 +34,7 @@ for (var i = 0; i < invalid_this.length; i++) {
     Error.prototype.toString.call(invalid_this[i]);
   } catch (e) {
     exception = true;
-    assertTrue("called_on_non_object" == e.type);
+    assertEquals("Error.prototype.toString called on non-object", e.message);
   }
   assertTrue(exception);
 }
diff --git a/deps/v8/test/mjsunit/regress/regress-2261.js b/deps/v8/test/mjsunit/regress/regress-2261.js
new file mode 100644
index 0000000000..000e07de5b
--- /dev/null
+++ b/deps/v8/test/mjsunit/regress/regress-2261.js
@@ -0,0 +1,113 @@
+// Copyright 2012 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Flags: --allow-natives-syntax
+
+// Test materialization of the arguments object when deoptimizing a
+// strict mode closure after modifying an argument.
+
+(function () {
+  var forceDeopt = 0;
+  function inner(x) {
+    "use strict";
+    x = 2;
+    // Do not remove this %DebugPrint as it makes sure the deopt happens
+    // after the assignment and is not hoisted above the assignment.
+    %DebugPrint(arguments[0]);
+    forceDeopt + 1;
+    return arguments[0];
+  }
+
+  assertEquals(1, inner(1));
+  assertEquals(1, inner(1));
+  %OptimizeFunctionOnNextCall(inner);
+  assertEquals(1, inner(1));
+  forceDeopt = "not a number";
+  assertEquals(1, inner(1));
+})();
+
+
+// Test materialization of the arguments object when deoptimizing an
+// inlined strict mode closure after modifying an argument.
+
+(function () {
+  var forceDeopt = 0;
+  function inner(x) {
+    "use strict";
+    x = 2;
+    // Do not remove this %DebugPrint as it makes sure the deopt happens
+    // after the assignment and is not hoisted above the assignment.
+    %DebugPrint(arguments[0]);
+    forceDeopt + 1;
+    return arguments[0];
+  }
+
+  function outer(x) {
+    return inner(x);
+  }
+
+  assertEquals(1, outer(1));
+  assertEquals(1, outer(1));
+  %OptimizeFunctionOnNextCall(outer);
+  assertEquals(1, outer(1));
+  forceDeopt = "not a number";
+  assertEquals(1, outer(1));
+})();
+
+
+// Test materialization of the multiple arguments objects when
+// deoptimizing several inlined closure after modifying an argument.
+
+(function () {
+  var forceDeopt = 0;
+  function inner(x,y,z) {
+    "use strict";
+    x = 3;
+    // Do not remove this %DebugPrint as it makes sure the deopt happens
+    // after the assignment and is not hoisted above the assignment.
+    %DebugPrint(arguments[0]);
+    forceDeopt + 1;
+    return arguments[0];
+  }
+
+  function middle(x) {
+    "use strict";
+    x = 2;
+    return inner(10*x, 20*x, 30*x) + arguments[0];
+  }
+
+  function outer(x) {
+   return middle(x);
+  }
+
+  assertEquals(21, outer(1));
+  assertEquals(21, outer(1));
+  %OptimizeFunctionOnNextCall(outer);
+  assertEquals(21, outer(1));
+  forceDeopt = "not a number";
+  assertEquals(21, outer(1));
+})();
diff --git a/deps/v8/test/mjsunit/regress/regress-2263.js b/deps/v8/test/mjsunit/regress/regress-2263.js
new file mode 100644
index 0000000000..9a9db58773
--- /dev/null
+++ b/deps/v8/test/mjsunit/regress/regress-2263.js
@@ -0,0 +1,30 @@
+// Copyright 2012 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+var obj = { length: { valueOf: function(){ throw { type: "length" }}}};
+var sep = { toString: function(){ throw { type: "toString" }}};
+assertThrows("Array.prototype.join.call(obj, sep)", undefined, "length");
diff --git a/deps/v8/test/mjsunit/regress-2286.js b/deps/v8/test/mjsunit/regress/regress-2286.js
index 372451ec44..372451ec44 100644
--- a/deps/v8/test/mjsunit/regress-2286.js
+++ b/deps/v8/test/mjsunit/regress/regress-2286.js
diff --git a/deps/v8/test/mjsunit/regress/regress-2315.js b/deps/v8/test/mjsunit/regress/regress-2315.js
new file mode 100644
index 0000000000..a3f9182c95
--- /dev/null
+++ b/deps/v8/test/mjsunit/regress/regress-2315.js
@@ -0,0 +1,40 @@
+// Copyright 2012 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Flags: --allow-natives-syntax
+
+var foo = (function() {
+  return eval("(function bar() { return 1; })");
+})();
+
+foo();
+foo();
+%OptimizeFunctionOnNextCall(foo);
+foo();
+
+// Function should be optimized now.
+assertTrue(%GetOptimizationStatus(foo) != 2);
diff --git a/deps/v8/test/mjsunit/regress/regress-2318.js b/deps/v8/test/mjsunit/regress/regress-2318.js
new file mode 100644
index 0000000000..ca67ab2ca5
--- /dev/null
+++ b/deps/v8/test/mjsunit/regress/regress-2318.js
@@ -0,0 +1,66 @@
+// Copyright 2012 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Flags: --expose-debug-as debug --nostack-trace-on-abort
+
+function f() {
+  var i = 0;
+
+  // Stack-allocate to reach the end of stack quickly.
+  var _A0 = 00; var _A1 = 01; var _A2 = 02; var _A3 = 03; var _A4 = 04;
+  var _B0 = 05; var _B1 = 06; var _B2 = 07; var _B3 = 08; var _B4 = 09;
+  var _C0 = 10; var _C1 = 11; var _C2 = 12; var _C3 = 13; var _C4 = 14;
+  var _D0 = 15; var _D1 = 16; var _D2 = 17; var _D3 = 18; var _D4 = 19;
+  var _E0 = 20; var _E1 = 21; var _E2 = 22; var _E3 = 23; var _E4 = 24;
+  var _F0 = 25; var _F1 = 26; var _F2 = 27; var _F3 = 28; var _F4 = 29;
+  var _G0 = 30; var _G1 = 31; var _G2 = 32; var _G3 = 33; var _G4 = 34;
+  var _H0 = 35; var _H1 = 36; var _H2 = 37; var _H3 = 38; var _H4 = 39;
+  var _I0 = 40; var _I1 = 41; var _I2 = 42; var _I3 = 43; var _I4 = 44;
+  var _J0 = 45; var _J1 = 46; var _J2 = 47; var _J3 = 48; var _J4 = 49;
+  var _K0 = 50; var _K1 = 51; var _K2 = 52; var _K3 = 53; var _K4 = 54;
+  var _L0 = 55; var _L1 = 56; var _L2 = 57; var _L3 = 58; var _L4 = 59;
+  var _M0 = 60; var _M1 = 61; var _M2 = 62; var _M3 = 63; var _M4 = 64;
+  var _N0 = 65; var _N1 = 66; var _N2 = 67; var _N3 = 68; var _N4 = 69;
+  var _O0 = 70; var _O1 = 71; var _O2 = 72; var _O3 = 73; var _O4 = 74;
+  var _P0 = 75; var _P1 = 76; var _P2 = 77; var _P3 = 78; var _P4 = 79;
+  var _Q0 = 80; var _Q1 = 81; var _Q2 = 82; var _Q3 = 83; var _Q4 = 84;
+  var _R0 = 85; var _R1 = 86; var _R2 = 87; var _R3 = 88; var _R4 = 89;
+  var _S0 = 90; var _S1 = 91; var _S2 = 92; var _S3 = 93; var _S4 = 94;
+  var _T0 = 95; var _T1 = 96; var _T2 = 97; var _T3 = 98; var _T4 = 99;
+
+  f();
+};
+
+Debug = debug.Debug;
+var bp = Debug.setBreakPoint(f, 0);
+
+function listener(event, exec_state, event_data, data) {
+  result = exec_state.frame().evaluate("i").value();
+};
+
+Debug.setListener(listener);
+assertThrows(function() { f(); }, RangeError);
diff --git a/deps/v8/test/mjsunit/regress/regress-2322.js b/deps/v8/test/mjsunit/regress/regress-2322.js
new file mode 100644
index 0000000000..1195bab67c
--- /dev/null
+++ b/deps/v8/test/mjsunit/regress/regress-2322.js
@@ -0,0 +1,36 @@
+// Copyright 2012 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Flags: --harmony-scoping
+
+"use strict";
+
+assertThrows("'use strict'; for (let x in x);", ReferenceError);
+
+let s;
+for (let pppp in {}) {};
+assertThrows(function() { pppp = true }, ReferenceError);
diff --git a/deps/v8/test/mjsunit/regress/regress-2336.js b/deps/v8/test/mjsunit/regress/regress-2336.js
new file mode 100644
index 0000000000..edfff60211
--- /dev/null
+++ b/deps/v8/test/mjsunit/regress/regress-2336.js
@@ -0,0 +1,53 @@
+// Copyright 2012 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Flags: --expose-debug-as debug --expose-gc
+
+// Check that we can cope with a debug listener that runs in the
+// GC epilogue and causes enough allocation to trigger a new GC during
+// the epilogue.
+
+var f = eval("(function f() { return 42; })");
+
+Debug = debug.Debug;
+
+var called = false;
+
+function listener(event, exec_state, event_data, data) {
+  if (event == Debug.DebugEvent.ScriptCollected) {
+    if (!called) {
+      called = true;
+      gc();
+    }
+  }
+};
+
+Debug.scripts();
+Debug.setListener(listener);
+f = void 0;
+gc();
+assertTrue(called);
diff --git a/deps/v8/test/mjsunit/regress/regress-2339.js b/deps/v8/test/mjsunit/regress/regress-2339.js
new file mode 100644
index 0000000000..b16821dbad
--- /dev/null
+++ b/deps/v8/test/mjsunit/regress/regress-2339.js
@@ -0,0 +1,59 @@
+// Copyright 2012 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Flags: --allow-natives-syntax --expose-gc
+
+/**
+ * The possible optimization states of a function. Must be in sync with the
+ * return values of Runtime_GetOptimizationStatus() in runtime.cc!
+ */
+
+var OptimizationState = {
+    YES: 1,
+    NO: 2,
+    ALWAYS: 3,
+    NEVER: 4
+};
+
+function simple() {
+  return simple_two_args(0, undefined);
+}
+
+function simple_two_args(always_zero, always_undefined) {
+  var always_five = always_undefined || 5;
+  return always_zero * always_five * .5;
+}
+
+
+simple();
+simple();
+%OptimizeFunctionOnNextCall(simple);
+simple();
+var raw_optimized = %GetOptimizationStatus(simple);
+assertFalse(raw_optimized == OptimizationState.NO);
+gc();
+
diff --git a/deps/v8/test/mjsunit/regress/regress-2346.js b/deps/v8/test/mjsunit/regress/regress-2346.js
new file mode 100644
index 0000000000..4c88b3e284
--- /dev/null
+++ b/deps/v8/test/mjsunit/regress/regress-2346.js
@@ -0,0 +1,123 @@
+// Copyright 2010 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// This file only tests very simple descriptors that always have
+// configurable, enumerable, and writable set to true.
+// A range of more elaborate tests are performed in
+// object-define-property.js
+
+// Flags: --stress-runs=5
+
+function get() { return x; }
+function set(x) { this.x = x; }
+
+var obj = {x: 1};
+obj.__defineGetter__("accessor", get);
+obj.__defineSetter__("accessor", set);
+var a = new Array();
+a[1] = 42;
+obj[1] = 42;
+
+var descIsData = Object.getOwnPropertyDescriptor(obj, 'x');
+assertTrue(descIsData.enumerable);
+assertTrue(descIsData.writable);
+assertTrue(descIsData.configurable);
+
+var descIsAccessor = Object.getOwnPropertyDescriptor(obj, 'accessor');
+assertTrue(descIsAccessor.enumerable);
+assertTrue(descIsAccessor.configurable);
+assertTrue(descIsAccessor.get == get);
+assertTrue(descIsAccessor.set == set);
+
+var descIsNotData = Object.getOwnPropertyDescriptor(obj, 'not-x');
+assertTrue(descIsNotData == undefined);
+
+var descIsNotAccessor = Object.getOwnPropertyDescriptor(obj, 'not-accessor');
+assertTrue(descIsNotAccessor == undefined);
+
+var descArray = Object.getOwnPropertyDescriptor(a, '1');
+assertTrue(descArray.enumerable);
+assertTrue(descArray.configurable);
+assertTrue(descArray.writable);
+assertEquals(descArray.value, 42);
+
+var descObjectElement = Object.getOwnPropertyDescriptor(obj, '1');
+assertTrue(descObjectElement.enumerable);
+assertTrue(descObjectElement.configurable);
+assertTrue(descObjectElement.writable);
+assertEquals(descObjectElement.value, 42);
+
+// String objects.
+var a = new String('foobar');
+for (var i = 0; i < a.length; i++) {
+  var descStringObject = Object.getOwnPropertyDescriptor(a, i);
+  assertTrue(descStringObject.enumerable);
+  assertFalse(descStringObject.configurable);
+  assertFalse(descStringObject.writable);
+  assertEquals(descStringObject.value, a.substring(i, i+1));
+}
+
+// Support for additional attributes on string objects.
+a.x = 42;
+a[10] = 'foo';
+var descStringProperty = Object.getOwnPropertyDescriptor(a, 'x');
+assertTrue(descStringProperty.enumerable);
+assertTrue(descStringProperty.configurable);
+assertTrue(descStringProperty.writable);
+assertEquals(descStringProperty.value, 42);
+
+var descStringElement = Object.getOwnPropertyDescriptor(a, '10');
+assertTrue(descStringElement.enumerable);
+assertTrue(descStringElement.configurable);
+assertTrue(descStringElement.writable);
+assertEquals(descStringElement.value, 'foo');
+
+// Test that elements in the prototype chain is not returned.
+var proto = {};
+proto[10] = 42;
+
+var objWithProto = new Array();
+objWithProto.prototype = proto;
+objWithProto[0] = 'bar';
+var descWithProto = Object.getOwnPropertyDescriptor(objWithProto, '10');
+assertEquals(undefined, descWithProto);
+
+// Test elements on global proxy object.
+var global = (function() { return this; })();
+
+global[42] = 42;
+
+function el_getter() { return 239; };
+function el_setter() {};
+Object.defineProperty(global, '239', {get: el_getter, set: el_setter});
+
+var descRegularElement = Object.getOwnPropertyDescriptor(global, '42');
+assertEquals(42, descRegularElement.value);
+
+var descAccessorElement = Object.getOwnPropertyDescriptor(global, '239');
+assertEquals(el_getter, descAccessorElement.get);
+assertEquals(el_setter, descAccessorElement.set);
diff --git a/deps/v8/test/mjsunit/regress/regress-2373.js b/deps/v8/test/mjsunit/regress/regress-2373.js
new file mode 100644
index 0000000000..16a87ece6f
--- /dev/null
+++ b/deps/v8/test/mjsunit/regress/regress-2373.js
@@ -0,0 +1,29 @@
+// Copyright 2012 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+var o = JSON.parse('{"a":2600753951}');
+assertEquals(2600753951, o.a);
diff --git a/deps/v8/test/mjsunit/regress/regress-2374.js b/deps/v8/test/mjsunit/regress/regress-2374.js
new file mode 100644
index 0000000000..b12e5f28c2
--- /dev/null
+++ b/deps/v8/test/mjsunit/regress/regress-2374.js
@@ -0,0 +1,33 @@
+// Copyright 2012 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+var msg = '{"result":{"profile":{"head":{"functionName":"(root)","url":"","lineNumber":0,"totalTime":495.7243772462511,"selfTime":0,"numberOfCalls":0,"visible":true,"callUID":2771605942,"children":[{"functionName":"(program)","url":"","lineNumber":0,"totalTime":495.7243772462511,"selfTime":495.7243772462511,"numberOfCalls":0,"visible":true,"callUID":1902715303,"children":[]}]},"bottomUpHead":{"functionName":"(root)","url":"","lineNumber":0,"totalTime":495.7243772462511,"selfTime":0,"numberOfCalls":0,"visible":true,"callUID":2771605942,"children":[{"functionName":"(program)","url":"","lineNumber":0,"totalTime":495.7243772462511,"selfTime":495.7243772462511,"numberOfCalls":0,"visible":true,"callUID":1902715303,"children":[]}]}}},"id":41}';
+
+var obj = JSON.parse(msg);
+var obj2 = JSON.parse(msg);
+
+assertEquals(JSON.stringify(obj), JSON.stringify(obj2));
diff --git a/deps/v8/test/mjsunit/regress/regress-2398.js b/deps/v8/test/mjsunit/regress/regress-2398.js
new file mode 100644
index 0000000000..1c66e7f84c
--- /dev/null
+++ b/deps/v8/test/mjsunit/regress/regress-2398.js
@@ -0,0 +1,41 @@
+// Copyright 2012 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+"use strict";
+
+var observed = false;
+
+var object = { get toString() { observed = true; } };
+Object.defineProperty(object, "ro", { value: 1 });
+
+try {
+  object.ro = 2;  // TypeError caused by trying to write to read-only.
+} catch (e) {
+  e.message;  // Forces formatting of the message object.
+}
+
+assertFalse(observed);
diff --git a/deps/v8/test/mjsunit/regress/regress-2410.js b/deps/v8/test/mjsunit/regress/regress-2410.js
new file mode 100644
index 0000000000..c16fd14cdc
--- /dev/null
+++ b/deps/v8/test/mjsunit/regress/regress-2410.js
@@ -0,0 +1,36 @@
+// Copyright 2012 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Object.prototype should be ignored in Object.getOwnPropertyNames
+//
+// See http://code.google.com/p/v8/issues/detail?id=2410 for details.
+
+Object.defineProperty(Object.prototype,
+                      'thrower',
+                      { get: function() { throw Error('bug') } });
+var obj = { thrower: 'local' };
+assertEquals(['thrower'], Object.getOwnPropertyNames(obj));
diff --git a/deps/v8/test/mjsunit/regress/regress-2416.js b/deps/v8/test/mjsunit/regress/regress-2416.js
new file mode 100644
index 0000000000..02afeb9a59
--- /dev/null
+++ b/deps/v8/test/mjsunit/regress/regress-2416.js
@@ -0,0 +1,75 @@
+// Copyright 2012 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+assertFalse(2147483647 < -2147483648)
+assertFalse(2147483647 <= -2147483648)
+assertFalse(2147483647 == -2147483648)
+assertTrue(2147483647 >= -2147483648)
+assertTrue(2147483647 > -2147483648)
+
+assertTrue(-2147483648 < 2147483647)
+assertTrue(-2147483648 <= 2147483647)
+assertFalse(-2147483648 == 2147483647)
+assertFalse(-2147483648 >= 2147483647)
+assertFalse(-2147483648 > 2147483647)
+
+assertFalse(2147483647 < 2147483647)
+assertTrue(2147483647 <= 2147483647)
+assertTrue(2147483647 == 2147483647)
+assertTrue(2147483647 >= 2147483647)
+assertFalse(2147483647 > 2147483647)
+
+assertFalse(-2147483648 < -2147483648)
+assertTrue(-2147483648 <= -2147483648)
+assertTrue(-2147483648 == -2147483648)
+assertTrue(-2147483648 >= -2147483648)
+assertFalse(-2147483648 > -2147483648)
+
+
+assertFalse(1073741823 < -1073741824)
+assertFalse(1073741823 <= -1073741824)
+assertFalse(1073741823 == -1073741824)
+assertTrue(1073741823 >= -1073741824)
+assertTrue(1073741823 > -1073741824)
+
+assertTrue(-1073741824 < 1073741823)
+assertTrue(-1073741824 <= 1073741823)
+assertFalse(-1073741824 == 1073741823)
+assertFalse(-1073741824 >= 1073741823)
+assertFalse(-1073741824 > 1073741823)
+
+assertFalse(1073741823 < 1073741823)
+assertTrue(1073741823 <= 1073741823)
+assertTrue(1073741823 == 1073741823)
+assertTrue(1073741823 >= 1073741823)
+assertFalse(1073741823 > 1073741823)
+
+assertFalse(-1073741824 < -1073741824)
+assertTrue(-1073741824 <= -1073741824)
+assertTrue(-1073741824 == -1073741824)
+assertTrue(-1073741824 >= -1073741824)
+assertFalse(-1073741824 > -1073741824)
diff --git a/deps/v8/test/mjsunit/regress/regress-2433.js b/deps/v8/test/mjsunit/regress/regress-2433.js
new file mode 100644
index 0000000000..dfe7131b59
--- /dev/null
+++ b/deps/v8/test/mjsunit/regress/regress-2433.js
@@ -0,0 +1,36 @@
+// Copyright 2012 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Transitioning from a PackedSmi to PackedDouble should fill the destination
+// with holes.
+//
+// See http://code.google.com/p/v8/issues/detail?id=2433 for details.
+
+arr = [];
+arr[0] = 0;
+arr[0] = 1.1;
+assertEquals(undefined, arr[1]);
diff --git a/deps/v8/test/mjsunit/regress/regress-2437.js b/deps/v8/test/mjsunit/regress/regress-2437.js
new file mode 100644
index 0000000000..06b69b23db
--- /dev/null
+++ b/deps/v8/test/mjsunit/regress/regress-2437.js
@@ -0,0 +1,75 @@
+// Copyright 2012 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Test Regexp.prototype.exec
+r = /a/;
+r.lastIndex = 1;
+r.exec("zzzz");
+assertEquals(0, r.lastIndex);
+
+// Test Regexp.prototype.test
+r = /a/;
+r.lastIndex = 1;
+r.test("zzzz");
+assertEquals(0, r.lastIndex);
+
+// Test String.prototype.match
+r = /a/;
+r.lastIndex = 1;
+"zzzz".match(r);
+assertEquals(0, r.lastIndex);
+
+// Test String.prototype.replace with atomic regexp and empty string.
+r = /a/;
+r.lastIndex = 1;
+"zzzz".replace(r, "");
+assertEquals(0, r.lastIndex);
+
+// Test String.prototype.replace with non-atomic regexp and empty string.
+r = /\d/;
+r.lastIndex = 1;
+"zzzz".replace(r, "");
+assertEquals(0, r.lastIndex);
+
+// Test String.prototype.replace with atomic regexp and non-empty string.
+r = /a/;
+r.lastIndex = 1;
+"zzzz".replace(r, "a");
+assertEquals(0, r.lastIndex);
+
+// Test String.prototype.replace with non-atomic regexp and non-empty string.
+r = /\d/;
+r.lastIndex = 1;
+"zzzz".replace(r, "a");
+assertEquals(0, r.lastIndex);
+
+// Test String.prototype.replace with replacement function
+r = /a/;
+r.lastIndex = 1;
+"zzzz".replace(r, function() { return ""; });
+assertEquals(0, r.lastIndex);
+
diff --git a/deps/v8/test/mjsunit/regress/regress-2438.js b/deps/v8/test/mjsunit/regress/regress-2438.js
new file mode 100644
index 0000000000..3f4fd7df57
--- /dev/null
+++ b/deps/v8/test/mjsunit/regress/regress-2438.js
@@ -0,0 +1,52 @@
+// Copyright 2012 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+function testSideEffects(subject, re) {
+  var counter = 0;
+  var side_effect_object = { valueOf: function() { return counter++; } };
+  re.lastIndex = side_effect_object;
+  re.exec(subject);
+  assertEquals(1, counter);
+
+  re.lastIndex = side_effect_object;
+  re.test(subject);
+  assertEquals(2, counter);
+
+  re.lastIndex = side_effect_object;
+  subject.match(re);
+  assertEquals(3, counter);
+
+  re.lastIndex = side_effect_object;
+  subject.replace(re, "");
+  assertEquals(4, counter);
+}
+
+testSideEffects("zzzz", /a/);
+testSideEffects("zzzz", /a/g);
+testSideEffects("xaxa", /a/);
+testSideEffects("xaxa", /a/g);
+
diff --git a/deps/v8/test/mjsunit/regress/regress-2443.js b/deps/v8/test/mjsunit/regress/regress-2443.js
new file mode 100644
index 0000000000..0800c45c02
--- /dev/null
+++ b/deps/v8/test/mjsunit/regress/regress-2443.js
@@ -0,0 +1,129 @@
+// Copyright 2012 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Number.prototype methods on non-Numbers.
+
+assertThrows(function() { Number.prototype.toExponential.call({}) },
+             TypeError);
+
+assertThrows(function() { Number.prototype.toPrecision.call({}) },
+             TypeError);
+
+assertThrows(function() { Number.prototype.toFixed.call({}) },
+             TypeError);
+
+assertThrows(function() { Number.prototype.toString.call({}) },
+             TypeError);
+
+assertThrows(function() { Number.prototype.toLocaleString.call({}) },
+             TypeError);
+
+assertThrows(function() { Number.prototype.ValueOf.call({}) },
+             TypeError);
+
+
+// Call on Number objects with custom valueOf method.
+
+var x_obj = new Number(1);
+x_obj.valueOf = function() { assertUnreachable(); };
+
+assertEquals("1.00e+0",
+             Number.prototype.toExponential.call(x_obj, 2));
+
+assertEquals("1.0",
+             Number.prototype.toPrecision.call(x_obj, 2));
+
+assertEquals("1.00",
+             Number.prototype.toFixed.call(x_obj, 2));
+
+// Call on primitive numbers.
+assertEquals("1.00e+0",
+             Number.prototype.toExponential.call(1, 2));
+
+assertEquals("1.0",
+             Number.prototype.toPrecision.call(1, 2));
+
+assertEquals("1.00",
+             Number.prototype.toFixed.call(1, 2));
+
+
+// toExponential and toPrecision does following steps in order
+// 1) convert the argument using ToInteger
+// 2) check for non-finite receiver, on which it returns,
+// 3) check argument range and throw exception if out of range.
+// Note that the the last two steps are reversed for toFixed.
+// Luckily, the receiver is expected to be a number or number
+// wrapper, so that getting its value is not observable.
+
+var f_flag = false;
+var f_obj = { valueOf: function() { f_flag = true; return 1000; } };
+
+assertEquals("NaN",
+             Number.prototype.toExponential.call(NaN, f_obj));
+assertTrue(f_flag);
+
+f_flag = false;
+assertEquals("Infinity",
+             Number.prototype.toExponential.call(1/0, f_obj));
+assertTrue(f_flag);
+
+f_flag = false;
+assertEquals("-Infinity",
+             Number.prototype.toExponential.call(-1/0, f_obj));
+assertTrue(f_flag);
+
+f_flag = false;
+assertEquals("NaN",
+             Number.prototype.toPrecision.call(NaN, f_obj));
+assertTrue(f_flag);
+
+f_flag = false;
+assertEquals("Infinity",
+             Number.prototype.toPrecision.call(1/0, f_obj));
+assertTrue(f_flag);
+
+f_flag = false;
+assertEquals("-Infinity",
+             Number.prototype.toPrecision.call(-1/0, f_obj));
+assertTrue(f_flag);
+
+// The odd man out: toFixed.
+
+f_flag = false;
+assertThrows(function() { Number.prototype.toFixed.call(NaN, f_obj) },
+             RangeError);
+assertTrue(f_flag);
+
+f_flag = false;
+assertThrows(function() { Number.prototype.toFixed.call(1/0, f_obj) },
+             RangeError);
+assertTrue(f_flag);
+
+f_flag = false;
+assertThrows(function() { Number.prototype.toFixed.call(-1/0, f_obj) },
+             RangeError);
+assertTrue(f_flag);
diff --git a/deps/v8/test/mjsunit/regress/regress-2444.js b/deps/v8/test/mjsunit/regress/regress-2444.js
new file mode 100644
index 0000000000..8fb8d8b52e
--- /dev/null
+++ b/deps/v8/test/mjsunit/regress/regress-2444.js
@@ -0,0 +1,120 @@
+// Copyright 2012 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+
+var flags;
+
+function resetFlags(size) {
+  flags = Array(size);
+  while (size--) flags[size] = 0;
+}
+
+function assertFlags(array) {
+  assertArrayEquals(array, flags);
+}
+
+function object_factory(flag_index, value, expected_flags) {
+  var obj = {};
+  obj.valueOf = function() {
+    assertFlags(expected_flags);
+    flags[flag_index]++;
+    return value;
+  }
+  return obj;
+}
+
+
+assertEquals(-Infinity, Math.max());
+
+resetFlags(1);
+assertEquals(NaN,
+             Math.max(object_factory(0, NaN, [0])));
+assertFlags([1]);
+
+resetFlags(2);
+assertEquals(NaN,
+             Math.max(object_factory(0, NaN, [0, 0]),
+                      object_factory(1,   0, [1, 0])));
+assertFlags([1, 1]);
+
+resetFlags(3);
+assertEquals(NaN,
+             Math.max(object_factory(0, NaN, [0, 0, 0]),
+                      object_factory(1,   0, [1, 0, 0]),
+                      object_factory(2,   1, [1, 1, 0])));
+assertFlags([1, 1, 1]);
+
+resetFlags(3);
+assertEquals(NaN,
+             Math.max(object_factory(0,   2, [0, 0, 0]),
+                      object_factory(1,   0, [1, 0, 0]),
+                      object_factory(2, NaN, [1, 1, 0])));
+assertFlags([1, 1, 1]);
+
+resetFlags(3);
+assertEquals(2,
+             Math.max(object_factory(0,   2, [0, 0, 0]),
+                      object_factory(1,   0, [1, 0, 0]),
+                      object_factory(2,   1, [1, 1, 0])));
+assertFlags([1, 1, 1]);
+
+
+assertEquals(+Infinity, Math.min());
+
+resetFlags(1);
+assertEquals(NaN,
+             Math.min(object_factory(0, NaN, [0])));
+assertFlags([1]);
+
+resetFlags(2);
+assertEquals(NaN,
+             Math.min(object_factory(0, NaN, [0, 0]),
+                      object_factory(1,   0, [1, 0])));
+assertFlags([1, 1]);
+
+resetFlags(3);
+assertEquals(NaN,
+             Math.min(object_factory(0, NaN, [0, 0, 0]),
+                      object_factory(1,   0, [1, 0, 0]),
+                      object_factory(2,   1, [1, 1, 0])));
+assertFlags([1, 1, 1]);
+
+resetFlags(3);
+assertEquals(NaN,
+             Math.min(object_factory(0,   2, [0, 0, 0]),
+                      object_factory(1,   0, [1, 0, 0]),
+                      object_factory(2, NaN, [1, 1, 0])));
+assertFlags([1, 1, 1]);
+
+resetFlags(3);
+assertEquals(0,
+             Math.min(object_factory(0,   2, [0, 0, 0]),
+                      object_factory(1,   0, [1, 0, 0]),
+                      object_factory(2,   1, [1, 1, 0])));
+assertFlags([1, 1, 1]);
+
+
diff --git a/deps/v8/test/mjsunit/regress/regress-492.js b/deps/v8/test/mjsunit/regress/regress-492.js
index a8b783b301..53b3195cfe 100644
--- a/deps/v8/test/mjsunit/regress/regress-492.js
+++ b/deps/v8/test/mjsunit/regress/regress-492.js
@@ -29,7 +29,7 @@
 // This should not hit any asserts in debug mode on ARM.
 
 function function_with_n_args(n) {
-  var source = '(function f(';
+  var source = '(function f' + n + '(';
   for (var arg = 0; arg < n; arg++) {
     if (arg != 0) source += ',';
     source += 'arg' + arg;
@@ -50,3 +50,41 @@ for (args = 500; args < 520; args++) {
 for (args = 1019; args < 1041; args++) {
   function_with_n_args(args);
 }
+
+
+function foo(
+  x, x, x, x, x, x, x, x, x, x, x, x, x, x, x, x,
+  x, x, x, x, x, x, x, x, x, x, x, x, x, x, x, x,
+  x, x, x, x, x, x, x, x, x, x, x, x, x, x, x, x,
+  x, x, x, x, x, x, x, x, x, x, x, x, x, x, x, x,
+  x, x, x, x, x, x, x, x, x, x, x, x, x, x, x, x,
+  x, x, x, x, x, x, x, x, x, x, x, x, x, x, x, x,
+  x, x, x, x, x, x, x, x, x, x, x, x, x, x, x, x,
+  x, x, x, x, x, x, x, x, x, x, x, x, x, x, x, x,
+  x, x, x, x, x, x, x, x, x, x, x, x, x, x, x, x,
+  x, x, x, x, x, x, x, x, x, x, x, x, x, x, x, x,
+  x, x, x, x, x, x, x, x, x, x, x, x, x, x, x, x,
+  x, x, x, x, x, x, x, x, x, x, x, x, x, x, x, x,
+  x, x, x, x, x, x, x, x, x, x, x, x, x, x, x, x,
+  x, x, x, x, x, x, x, x, x, x, x, x, x, x, x, x,
+  x, x, x, x, x, x, x, x, x, x, x, x, x, x, x, x,
+  x, x, x, x, x, x, x, x, x, x, x, x, x, x, x, x,
+  x, x, x, x, x, x, x, x, x, x, x, x, x, x, x, x,
+  x, x, x, x, x, x, x, x, x, x, x, x, x, x, x, x,
+  x, x, x, x, x, x, x, x, x, x, x, x, x, x, x, x,
+  x, x, x, x, x, x, x, x, x, x, x, x, x, x, x, x,
+  x, x, x, x, x, x, x, x, x, x, x, x, x, x, x, x,
+  x, x, x, x, x, x, x, x, x, x, x, x, x, x, x, x,
+  x, x, x, x, x, x, x, x, x, x, x, x, x, x, x, x,
+  x, x, x, x, x, x, x, x, x, x, x, x, x, x, x, x,
+  x, x, x, x, x, x, x, x, x, x, x, x, x, x, x, x,
+  x, x, x, x, x, x, x, x, x, x, x, x, x, x, x, x,
+  x, x, x, x, x, x, x, x, x, x, x, x, x, x, x, x,
+  x, x, x, x, x, x, x, x, x, x, x, x, x, x, x, x,
+  x, x, x, x, x, x, x, x, x, x, x, x, x, x, x, x,
+  x, x, x, x, x, x, x, x, x, x, x, x, x, x, x, x,
+  x, x, x, x, x, x, x, x, x, x, x, x, x, x, x, x,
+  x, x, x, x, x, x, x, x, x, x, x, x, x, x, x, x
+) {}
+
+for (var i = 0; i < 10000; ++i) foo();
diff --git a/deps/v8/test/mjsunit/regress/regress-builtin-array-op.js b/deps/v8/test/mjsunit/regress/regress-builtin-array-op.js
new file mode 100644
index 0000000000..1e37af3648
--- /dev/null
+++ b/deps/v8/test/mjsunit/regress/regress-builtin-array-op.js
@@ -0,0 +1,38 @@
+// Copyright 2012 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Test that we invoke the correct sort function in
+// array operations.
+
+var foo =  "hest";
+Array.prototype.sort = function(fn) { foo = "fisk"; };
+Function.prototype.call = function() { foo = "caramel"; };
+var a = [2,3,1];
+a[100000] = 0;
+a.join();
+assertEquals("hest", foo);
+
diff --git a/deps/v8/test/mjsunit/regress/regress-cnlt-elements.js b/deps/v8/test/mjsunit/regress/regress-cnlt-elements.js
new file mode 100644
index 0000000000..634534c533
--- /dev/null
+++ b/deps/v8/test/mjsunit/regress/regress-cnlt-elements.js
@@ -0,0 +1,43 @@
+// Copyright 2012 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Flags: --expose-gc
+
+var a = JSON.parse('{"b":1,"c":2,"d":3,"e":4}');
+var b = JSON.parse('{"12040200":1, "a":2, "b":2}');
+var c = JSON.parse('{"24050300":1}');
+b = null;
+gc();
+gc();
+c.a1 = 2;
+c.a2 = 2;
+c.a3 = 2;
+c.a4 = 2;
+c.a5 = 2;
+c.a6 = 2;
+c.a7 = 2;
+c.a8 = 2;
diff --git a/deps/v8/test/mjsunit/regress/regress-cnlt-enum-indices.js b/deps/v8/test/mjsunit/regress/regress-cnlt-enum-indices.js
new file mode 100644
index 0000000000..03582bbbe4
--- /dev/null
+++ b/deps/v8/test/mjsunit/regress/regress-cnlt-enum-indices.js
@@ -0,0 +1,45 @@
+// Copyright 2012 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Flags: --allow-natives-syntax --expose-gc
+
+var o = {};
+var o2 = {};
+
+o.a = 1;
+o2.a = 1;
+function f() { return 10; }
+// Adds a non-field enumerable property.
+Object.defineProperty(o, "b", { get: f, enumerable: true });
+Object.defineProperty(o2, "b", { get: f, enumerable: true });
+assertTrue(%HaveSameMap(o, o2));
+o.c = 2;
+
+for (var x in o) { }
+o = null;
+
+gc();
diff --git a/deps/v8/test/mjsunit/regress/regress-cntl-descriptors-enum.js b/deps/v8/test/mjsunit/regress/regress-cntl-descriptors-enum.js
new file mode 100644
index 0000000000..ee72fafc8a
--- /dev/null
+++ b/deps/v8/test/mjsunit/regress/regress-cntl-descriptors-enum.js
@@ -0,0 +1,46 @@
+// Copyright 2012 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Flags: --allow-natives-syntax --expose-gc
+
+DontEnum = 2;
+
+var o = {};
+%SetProperty(o, "a", 0, DontEnum);
+
+var o2 = {};
+%SetProperty(o2, "a", 0, DontEnum);
+
+assertTrue(%HaveSameMap(o, o2));
+
+o.y = 2;
+
+for (var v in o) { print(v); }
+o = {};
+gc();
+
+for (var v in o2) { print(v); }
diff --git a/deps/v8/test/mjsunit/regress/regress-convert-enum.js b/deps/v8/test/mjsunit/regress/regress-convert-enum.js
new file mode 100644
index 0000000000..c624cad5af
--- /dev/null
+++ b/deps/v8/test/mjsunit/regress/regress-convert-enum.js
@@ -0,0 +1,60 @@
+// Copyright 2012 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Flags: --expose-gc
+
+// Create a transition tree A (no descriptors) -> B (descriptor for a) -> C
+// (descriptor for a and c), that all share the descriptor array [a,c]. C is the
+// owner of the descriptor array.
+var o = {};
+o.a = 1;
+o.c = 2;
+
+// Add a transition B -> D where D has its own descriptor array [a,b] where b is
+// a constant function.
+var o1 = {};
+o1.a = 1;
+
+// Install an enumeration cache in the descriptor array [a,c] at map B.
+for (var x in o1) { }
+o1.b = function() { return 1; };
+
+// Return ownership of the descriptor array [a,c] to B and trim it to [a].
+o = null;
+gc();
+
+// Convert the transition B -> D into a transition to B -> E so that E uses the
+// instance descriptors [a,b] with b being a field.
+var o2 = {};
+o2.a = 1;
+o2.b = 10;
+
+// Create an object with map B and iterate over it.
+var o3 = {};
+o3.a = 1;
+
+for (var y in o3) { }
diff --git a/deps/v8/test/mjsunit/regress/regress-convert-enum2.js b/deps/v8/test/mjsunit/regress/regress-convert-enum2.js
new file mode 100644
index 0000000000..cdc7fbe2b6
--- /dev/null
+++ b/deps/v8/test/mjsunit/regress/regress-convert-enum2.js
@@ -0,0 +1,46 @@
+// Copyright 2012 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+var o = {};
+o.a = 1;
+o.b = function() { return 1; };
+o.d = 2;
+
+for (var x in o) { }
+
+var o1 = {};
+o1.a = 1;
+o1.b = 10;
+o1.c = 20;
+
+var keys = ["a", "b", "c"];
+
+var i = 0;
+for (var y in o1) {
+  assertEquals(keys[i], y);
+  i += 1;
+}
diff --git a/deps/v8/test/mjsunit/regress/regress-convert-transition.js b/deps/v8/test/mjsunit/regress/regress-convert-transition.js
new file mode 100644
index 0000000000..057dc8045c
--- /dev/null
+++ b/deps/v8/test/mjsunit/regress/regress-convert-transition.js
@@ -0,0 +1,40 @@
+// Copyright 2012 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+var input = '{ "a1":1, "a2":1, "a3":1, "a4":1, "a5":1, "a6":1, "a7":1,\
+               "a8":1, "a9":1, "a10":1, "a11":1, "a12":1, "a13":1}';
+var a = JSON.parse(input);
+a.a = function() { return 10; };
+
+// Force conversion of field to slow mode.
+var b = JSON.parse(input);
+b.a = 10;
+
+// Add another property to the object that would transition to a.
+var c = JSON.parse(input);
+c.x = 10;
+assertEquals(undefined, c.a);
diff --git a/deps/v8/test/mjsunit/regress/regress-crbug-119926.js b/deps/v8/test/mjsunit/regress/regress-crbug-119926.js
index 26b84fad7f..1ad250a2b8 100644
--- a/deps/v8/test/mjsunit/regress/regress-crbug-119926.js
+++ b/deps/v8/test/mjsunit/regress/regress-crbug-119926.js
@@ -25,9 +25,11 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+// Flags: --gc-global
+
 // Test that array elements don't break upon garbage collection.
 
 var a = new Array(500);
-for (var i = 0; i < 500000; i++) {
+for (var i = 0; i < 100000; i++) {
   a[i] = new Object();
 }
diff --git a/deps/v8/test/mjsunit/regress/regress-crbug-135066.js b/deps/v8/test/mjsunit/regress/regress-crbug-135066.js
index 1aeca8b1a3..35e9ff8c87 100644
--- a/deps/v8/test/mjsunit/regress/regress-crbug-135066.js
+++ b/deps/v8/test/mjsunit/regress/regress-crbug-135066.js
@@ -29,25 +29,27 @@
 var filler = "//" + new Array(1024).join('x');
 
 // Test strict eval in global context.
-eval(
+assertEquals(23, eval(
   "'use strict';" +
   "var x = 23;" +
   "var f = function bozo1() {" +
   "  return x;" +
   "};" +
   "assertSame(23, f());" +
+  "f;" +
   filler
-);
+)());
 
 // Test default eval in strict context.
-(function() {
+assertEquals(42, (function() {
   "use strict";
-  eval(
+  return eval(
     "var y = 42;" +
     "var g = function bozo2() {" +
     "  return y;" +
     "};" +
     "assertSame(42, g());" +
+    "g;" +
     filler
-  );
-})();
+  )();
+})());
diff --git a/deps/v8/test/mjsunit/regress/regress-crbug-146910.js b/deps/v8/test/mjsunit/regress/regress-crbug-146910.js
new file mode 100644
index 0000000000..120f809731
--- /dev/null
+++ b/deps/v8/test/mjsunit/regress/regress-crbug-146910.js
@@ -0,0 +1,38 @@
+// Copyright 2012 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+var x = [];
+assertSame(0, x.length);
+assertSame(undefined, x[0]);
+
+Object.defineProperty(x, '0', { value: 7, configurable: false });
+assertSame(1, x.length);
+assertSame(7, x[0]);
+
+x.length = 0;
+assertSame(1, x.length);
+assertSame(7, x[0]);
diff --git a/deps/v8/test/mjsunit/regress/regress-crbug-150545.js b/deps/v8/test/mjsunit/regress/regress-crbug-150545.js
new file mode 100644
index 0000000000..68efdbf2d7
--- /dev/null
+++ b/deps/v8/test/mjsunit/regress/regress-crbug-150545.js
@@ -0,0 +1,53 @@
+// Copyright 2012 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Flags: --allow-natives-syntax
+
+// Test that we do not generate OSR entry points that have an arguments
+// stack height different from zero. The OSR machinery cannot generate
+// frames for that.
+
+(function() {
+  "use strict";
+
+  var instantReturn = false;
+  function inner() {
+    if (instantReturn) return;
+    assertSame(3, arguments.length);
+    assertSame(1, arguments[0]);
+    assertSame(2, arguments[1]);
+    assertSame(3, arguments[2]);
+  }
+
+  function outer() {
+    inner(1,2,3);
+    // Trigger OSR.
+    while (%GetOptimizationStatus(outer) == 2) {}
+  }
+
+  outer();
+})();
diff --git a/deps/v8/test/mjsunit/regress/regress-crbug-157019.js b/deps/v8/test/mjsunit/regress/regress-crbug-157019.js
new file mode 100644
index 0000000000..1c54089ff9
--- /dev/null
+++ b/deps/v8/test/mjsunit/regress/regress-crbug-157019.js
@@ -0,0 +1,54 @@
+// Copyright 2012 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Flags: --allow-natives-syntax --nocrankshaft
+
+function makeConstructor() {
+  return function() {
+    this.a = 1;
+    this.b = 2;
+  };
+}
+
+var c1 = makeConstructor();
+var o1 = new c1();
+
+c1.prototype = {};
+
+for (var i = 0; i < 10; i++) {
+  var o = new c1();
+  for (var j = 0; j < 8; j++) {
+    o["x" + j] = 0;
+  }
+}
+
+var c2 = makeConstructor();
+var o2 = new c2();
+
+for (var i = 0; i < 50000; i++) {
+  new c2();
+}
diff --git a/deps/v8/test/mjsunit/regress/regress-crbug-157520.js b/deps/v8/test/mjsunit/regress/regress-crbug-157520.js
new file mode 100644
index 0000000000..17081dfa52
--- /dev/null
+++ b/deps/v8/test/mjsunit/regress/regress-crbug-157520.js
@@ -0,0 +1,38 @@
+// Copyright 2012 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Flags: --nocrankshaft
+
+(function(){
+  var f = function(arg) {
+    arg = 2;
+    return arguments[0];
+  };
+  for (var i = 0; i < 50000; i++) {
+    assertSame(2, f(1));
+  }
+})();
diff --git a/deps/v8/test/mjsunit/regress/regress-crbug-158185.js b/deps/v8/test/mjsunit/regress/regress-crbug-158185.js
new file mode 100644
index 0000000000..99f19c72fd
--- /dev/null
+++ b/deps/v8/test/mjsunit/regress/regress-crbug-158185.js
@@ -0,0 +1,39 @@
+// Copyright 2012 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+assertEquals("0023456",
+             Object.keys(JSON.parse('{"0023456": 1}'))[0]);
+assertEquals("1234567890123",
+             Object.keys(JSON.parse('{"1234567890123": 1}'))[0]);
+assertEquals("123456789ABCD",
+             Object.keys(JSON.parse('{"123456789ABCD": 1}'))[0]);
+assertEquals("12A",
+             Object.keys(JSON.parse('{"12A": 1}'))[0]);
+
+assertEquals(1, JSON.parse('{"0":1}')[0]);
+assertEquals(undefined, JSON.parse('{"00":1}')[0]);
+
diff --git a/deps/v8/test/mjsunit/regress/regress-crbug-160010.js b/deps/v8/test/mjsunit/regress/regress-crbug-160010.js
new file mode 100644
index 0000000000..266e545325
--- /dev/null
+++ b/deps/v8/test/mjsunit/regress/regress-crbug-160010.js
@@ -0,0 +1,33 @@
+// Copyright 2012 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+var str = "a";
+for (var i = 0; i < 28; i++) {
+  str += str;
+}
+JSON.stringify(str);
+
diff --git a/deps/v8/test/mjsunit/regress/regress-crbug-162085.js b/deps/v8/test/mjsunit/regress/regress-crbug-162085.js
new file mode 100644
index 0000000000..a53b2c9987
--- /dev/null
+++ b/deps/v8/test/mjsunit/regress/regress-crbug-162085.js
@@ -0,0 +1,71 @@
+// Copyright 2012 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Ensure extending an empty packed smi array with a double initializes the
+// array with holes.
+var a = [1,2,3];
+a.length = 0;
+a[0] = 1.4;
+assertEquals(1.4, a[0]);
+assertEquals(undefined, a[1]);
+assertEquals(undefined, a[2]);
+assertEquals(undefined, a[3]);
+
+// Ensure the double array growstub initializes the array with holes.
+function grow_store(a,i,v) {
+  a[i] = v;
+}
+
+var a2 = [1.3];
+grow_store(a2,1,1.4);
+a2.length = 0;
+grow_store(a2,0,1.5);
+assertEquals(1.5, a2[0]);
+assertEquals(undefined, a2[1]);
+assertEquals(undefined, a2[2]);
+assertEquals(undefined, a2[3]);
+
+// Check storing objects using the double grow stub.
+var a3 = [1.3];
+var o = {};
+grow_store(a3, 1, o);
+assertEquals(1.3, a3[0]);
+assertEquals(o, a3[1]);
+
+// Ensure the double array growstub initializes the array with holes.
+function grow_store2(a,i,v) {
+  a[i] = v;
+}
+
+var a4 = [1.3];
+grow_store2(a4,1,1.4);
+a4.length = 0;
+grow_store2(a4,0,1);
+assertEquals(1, a4[0]);
+assertEquals(undefined, a4[1]);
+assertEquals(undefined, a4[2]);
+assertEquals(undefined, a4[3]);
diff --git a/deps/v8/test/mjsunit/regress/regress-crbug-18639.js b/deps/v8/test/mjsunit/regress/regress-crbug-18639.js
index 23e225a4f4..4f4bb7c796 100644
--- a/deps/v8/test/mjsunit/regress/regress-crbug-18639.js
+++ b/deps/v8/test/mjsunit/regress/regress-crbug-18639.js
@@ -27,8 +27,12 @@
 
 // See http://crbug.com/18639
 
-toString = toString;
-__defineGetter__("z", (0).toLocaleString);
-z;
-z;
-((0).toLocaleString)();
+try {
+  toString = toString;
+  __defineGetter__("z", (0).toLocaleString);
+  z;
+  z;
+  ((0).toLocaleString)();
+} catch (e) {
+  assertInstanceof(e, TypeError);
+}
\ No newline at end of file
diff --git a/deps/v8/test/mjsunit/regress/regress-delete-empty-double.js b/deps/v8/test/mjsunit/regress/regress-delete-empty-double.js
new file mode 100644
index 0000000000..f7af2b1e31
--- /dev/null
+++ b/deps/v8/test/mjsunit/regress/regress-delete-empty-double.js
@@ -0,0 +1,40 @@
+// Copyright 2012 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Flags: --allow-natives-syntax
+
+a = [1.1,2.2,3.3];
+a.length = 1;
+delete a[1];
+
+assertTrue(%HasFastDoubleElements(a));
+assertFalse(%HasFastHoleyElements(a));
+
+delete a[0];
+
+assertTrue(%HasFastDoubleElements(a));
+assertTrue(%HasFastHoleyElements(a));
diff --git a/deps/v8/test/mjsunit/regress/regress-json-stringify-gc.js b/deps/v8/test/mjsunit/regress/regress-json-stringify-gc.js
new file mode 100644
index 0000000000..c0a71bf4a1
--- /dev/null
+++ b/deps/v8/test/mjsunit/regress/regress-json-stringify-gc.js
@@ -0,0 +1,41 @@
+// Copyright 2012 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+var a = [];
+var new_space_string = "";
+for (var i = 0; i < 128; i++) {
+  new_space_string += String.fromCharCode((Math.random() * 26 + 65) | 0);
+}
+for (var i = 0; i < 10000; i++) a.push(new_space_string);
+
+// At some point during the first stringify, allocation causes a GC and
+// new_space_string is moved to old space. Make sure that this does not
+// screw up reading from the correct location.
+json1 = JSON.stringify(a);
+json2 = JSON.stringify(a);
+assertTrue(json1 == json2, "GC caused JSON.stringify to fail.");
+
diff --git a/deps/v8/test/mjsunit/regress/regress-observe-empty-double-array.js b/deps/v8/test/mjsunit/regress/regress-observe-empty-double-array.js
new file mode 100644
index 0000000000..aea9c73b22
--- /dev/null
+++ b/deps/v8/test/mjsunit/regress/regress-observe-empty-double-array.js
@@ -0,0 +1,37 @@
+// Copyright 2012 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Flags: --harmony-observation --allow-natives-syntax
+//
+// Test passes if it does not crash.
+
+arr = [1.1];
+Object.observe(arr, function(){});
+arr.length = 0;
+assertTrue(%HasFastDoubleElements(arr));
+// Should not crash
+arr.push(1.1);
diff --git a/deps/v8/test/mjsunit/regress/regress-undefined-store-keyed-fast-element.js b/deps/v8/test/mjsunit/regress/regress-undefined-store-keyed-fast-element.js
new file mode 100644
index 0000000000..9e6ec9db07
--- /dev/null
+++ b/deps/v8/test/mjsunit/regress/regress-undefined-store-keyed-fast-element.js
@@ -0,0 +1,37 @@
+// Copyright 2012 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Flags: --allow-natives-syntax
+
+function f(v) {
+  return [0.0, 0.1, 0.2, v];
+}
+
+assertEquals([0.0, 0.1, 0.2, NaN], f(NaN));
+assertEquals([0.0, 0.1, 0.2, NaN], f(NaN));
+%OptimizeFunctionOnNextCall(f);
+assertEquals([0.0, 0.1, 0.2, undefined], f(undefined));
diff --git a/deps/v8/test/mjsunit/shift-for-integer-div.js b/deps/v8/test/mjsunit/shift-for-integer-div.js
new file mode 100644
index 0000000000..0fe1262292
--- /dev/null
+++ b/deps/v8/test/mjsunit/shift-for-integer-div.js
@@ -0,0 +1,59 @@
+// Copyright 2012 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+function divp4(x) {
+  return x / 4;
+}
+
+for (var i = 0; i < 10000; i+=4) {
+  assertEquals(i >> 2, divp4(i));
+}
+
+assertEquals(0.5, divp4(2));
+
+function divn4(x) {
+  return x / (-4);
+}
+
+for (var i = 0; i < 10000; i+=4) {
+  assertEquals(-(i >> 2), divn4(i));
+}
+
+assertEquals(-0, divn4(0));
+
+
+function divn1(x) {
+  return x / (-1);
+}
+
+for (var i = 0; i < 10000; i++) {
+  assertEquals(-i, divn1(i));
+}
+
+var min_int = -(0x7FFFFFFF)-1;
+assertEquals(-min_int, divn1(min_int));
+
diff --git a/deps/v8/test/mjsunit/stack-traces-overflow.js b/deps/v8/test/mjsunit/stack-traces-overflow.js
new file mode 100644
index 0000000000..7722e93bd2
--- /dev/null
+++ b/deps/v8/test/mjsunit/stack-traces-overflow.js
@@ -0,0 +1,122 @@
+// Copyright 2012 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+function rec1(a) { rec1(a+1); }
+function rec2(a) { rec3(a+1); }
+function rec3(a) { rec2(a+1); }
+
+// Test stack trace getter and setter.
+try {
+  rec1(0);
+} catch (e) {
+  assertTrue(e.stack.indexOf("rec1") > 0);
+  e.stack = "123";
+  assertEquals("123", e.stack);
+}
+
+// Test setter w/o calling the getter.
+try {
+  rec2(0);
+} catch (e) {
+  assertTrue(e.stack.indexOf("rec2") > 0);
+  assertTrue(e.stack.indexOf("rec3") > 0);
+  e.stack = "123";
+  assertEquals("123", e.stack);
+}
+
+// Test getter to make sure setter does not affect the boilerplate.
+try {
+  rec1(0);
+} catch (e) {
+  assertTrue(e.stack.indexOf("rec1") > 0);
+  assertInstanceof(e, RangeError);
+}
+
+
+// Check setting/getting stack property on the prototype chain.
+function testErrorPrototype(prototype) {
+  var object = {};
+  object.__proto__ = prototype;
+  object.stack = "123";
+  assertEquals("123", object.stack);
+  assertTrue("123" != prototype.stack);
+}
+
+try {
+  rec1(0);
+} catch (e) {
+  e.stack;
+  testErrorPrototype(e);
+}
+
+try {
+  rec1(0);
+} catch (e) {
+  testErrorPrototype(e);
+}
+
+try {
+  throw new Error();
+} catch (e) {
+  testErrorPrototype(e);
+}
+
+Error.stackTraceLimit = 3;
+try {
+  rec1(0);
+} catch (e) {
+  assertEquals(4, e.stack.split('\n').length);
+}
+
+Error.stackTraceLimit = 25.9;
+try {
+  rec1(0);
+} catch (e) {
+  assertEquals(26, e.stack.split('\n').length);
+}
+
+Error.stackTraceLimit = NaN;
+try {
+  rec1(0);
+} catch (e) {
+  assertEquals(1, e.stack.split('\n').length);
+}
+
+Error.stackTraceLimit = "not a number";
+try {
+  rec1(0);
+} catch (e) {
+  assertEquals(undefined, e.stack);
+}
+
+Error.stackTraceLimit = 3;
+Error = "";  // Overwrite Error in the global object.
+try {
+  rec1(0);
+} catch (e) {
+  assertEquals(4, e.stack.split('\n').length);
+}
diff --git a/deps/v8/test/mjsunit/strict-mode.js b/deps/v8/test/mjsunit/strict-mode.js
index 9c9bdfd52d..5fb404a799 100644
--- a/deps/v8/test/mjsunit/strict-mode.js
+++ b/deps/v8/test/mjsunit/strict-mode.js
@@ -1141,9 +1141,9 @@ function CheckPillDescriptor(func, name) {
 
   function strict() {
     "use strict";
-    return_my_caller();
+    return return_my_caller();
   }
-  assertThrows(strict, TypeError);
+  assertSame(null, strict());
 
   function non_strict() {
     return return_my_caller();
@@ -1155,32 +1155,57 @@ function CheckPillDescriptor(func, name) {
 (function TestNonStrictFunctionCallerPill() {
   function strict(n) {
     "use strict";
-    non_strict(n);
+    return non_strict(n);
   }
 
   function recurse(n, then) {
     if (n > 0) {
-      recurse(n - 1);
+      return recurse(n - 1, then);
     } else {
       return then();
     }
   }
 
   function non_strict(n) {
-    recurse(n, function() { non_strict.caller; });
+    return recurse(n, function() { return non_strict.caller; });
   }
 
   function test(n) {
-    try {
-      recurse(n, function() { strict(n); });
-    } catch(e) {
-      return e instanceof TypeError;
+    return recurse(n, function() { return strict(n); });
+  }
+
+  for (var i = 0; i < 10; i ++) {
+    assertSame(null, test(i));
+  }
+})();
+
+
+(function TestNonStrictFunctionCallerDescriptorPill() {
+  function strict(n) {
+    "use strict";
+    return non_strict(n);
+  }
+
+  function recurse(n, then) {
+    if (n > 0) {
+      return recurse(n - 1, then);
+    } else {
+      return then();
     }
-    return false;
+  }
+
+  function non_strict(n) {
+    return recurse(n, function() {
+      return Object.getOwnPropertyDescriptor(non_strict, "caller").value;
+    });
+  }
+
+  function test(n) {
+    return recurse(n, function() { return strict(n); });
   }
 
   for (var i = 0; i < 10; i ++) {
-    assertEquals(test(i), true);
+    assertSame(null, test(i));
   }
 })();
 
diff --git a/deps/v8/test/mjsunit/string-natives.js b/deps/v8/test/mjsunit/string-natives.js
new file mode 100644
index 0000000000..b1ec875420
--- /dev/null
+++ b/deps/v8/test/mjsunit/string-natives.js
@@ -0,0 +1,72 @@
+// Copyright 2012 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Flags: --expose-gc --allow-natives-syntax
+
+function test() {
+  var s1 = %NewString(26, true);
+  for (i = 0; i < 26; i++) %_OneByteSeqStringSetChar(s1, i, i+65);
+  assertEquals("ABCDEFGHIJKLMNOPQRSTUVWXYZ", s1);
+  s1 = %TruncateString(s1, 13);
+  assertEquals("ABCDEFGHIJKLM", s1);
+
+  var s2 = %NewString(26, false);
+  for (i = 0; i < 26; i++) %_TwoByteSeqStringSetChar(s2, i, i+65);
+  assertEquals("ABCDEFGHIJKLMNOPQRSTUVWXYZ", s2);
+  s2 = %TruncateString(s1, 13);
+  assertEquals("ABCDEFGHIJKLM", s2);
+
+  var s3 = %NewString(26, false);
+  for (i = 0; i < 26; i++) %_TwoByteSeqStringSetChar(s3, i, i+1000);
+  for (i = 0; i < 26; i++) assertEquals(s3[i], String.fromCharCode(i+1000));
+
+  var a = [];
+  for (var i = 0; i < 1000; i++) {
+    var s = %NewString(10000, i % 2 == 1);
+    a.push(s);
+  }
+
+  gc();
+
+  for (var i = 0; i < 1000; i++) {
+    assertEquals(10000, a[i].length);
+    a[i] = %TruncateString(a[i], 5000);
+  }
+
+  gc();
+
+  for (var i = 0; i < 1000; i++) {
+    assertEquals(5000, a[i].length);
+  }
+}
+
+
+test();
+test();
+%OptimizeFunctionOnNextCall(test);
+test();
+
diff --git a/deps/v8/test/mjsunit/string-split.js b/deps/v8/test/mjsunit/string-split.js
index d8412f0eed..1308244cab 100644
--- a/deps/v8/test/mjsunit/string-split.js
+++ b/deps/v8/test/mjsunit/string-split.js
@@ -66,6 +66,23 @@ assertArrayEquals(["div", "#i", "d", ".class"], "div#id.class".split(/(?=[d#.])/
 
 assertArrayEquals(["a", "b", "c"], "abc".split(/(?=.)/));
 
+assertArrayEquals(["Wenige", "sind", "auserwählt."],
+                  "Wenige sind auserwählt.".split(" "));
+
+assertArrayEquals([], "Wenige sind auserwählt.".split(" ", 0));
+
+assertArrayEquals(["Wenige"], "Wenige sind auserwählt.".split(" ", 1));
+
+assertArrayEquals(["Wenige", "sind"], "Wenige sind auserwählt.".split(" ", 2));
+
+assertArrayEquals(["Wenige", "sind", "auserwählt."],
+                  "Wenige sind auserwählt.".split(" ", 3));
+
+assertArrayEquals(["Wenige sind auserw", "hlt."],
+                  "Wenige sind auserwählt.".split("ä"));
+
+assertArrayEquals(["Wenige sind ", "."],
+                  "Wenige sind auserwählt.".split("auserwählt"));
 
 /* "ab".split(/((?=.))/)
  *
diff --git a/deps/v8/test/mjsunit/testcfg.py b/deps/v8/test/mjsunit/testcfg.py
index 5a2f31481e..c8b972c12f 100644
--- a/deps/v8/test/mjsunit/testcfg.py
+++ b/deps/v8/test/mjsunit/testcfg.py
@@ -25,17 +25,87 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-import test
 import os
-from os.path import join, dirname, exists
 import re
-import tempfile
+
+from testrunner.local import testsuite
+from testrunner.objects import testcase
 
 FLAGS_PATTERN = re.compile(r"//\s+Flags:(.*)")
 FILES_PATTERN = re.compile(r"//\s+Files:(.*)")
 SELF_SCRIPT_PATTERN = re.compile(r"//\s+Env: TEST_FILE_NAME")
 
 
+class MjsunitTestSuite(testsuite.TestSuite):
+
+  def __init__(self, name, root):
+    super(MjsunitTestSuite, self).__init__(name, root)
+
+  def ListTests(self, context):
+    tests = []
+    for dirname, dirs, files in os.walk(self.root):
+      for dotted in [x for x in dirs if x.startswith('.')]:
+        dirs.remove(dotted)
+      dirs.sort()
+      files.sort()
+      for filename in files:
+        if filename.endswith(".js") and filename != "mjsunit.js":
+          testname = join(dirname[len(self.root) + 1:], filename[:-3])
+          test = testcase.TestCase(self, testname)
+          tests.append(test)
+    return tests
+
+  def GetFlagsForTestCase(self, testcase, context):
+    source = self.GetSourceForTest(testcase)
+    flags = [] + context.mode_flags
+    flags_match = re.findall(FLAGS_PATTERN, source)
+    for match in flags_match:
+      flags += match.strip().split()
+
+    files_list = []  # List of file names to append to command arguments.
+    files_match = FILES_PATTERN.search(source);
+    # Accept several lines of 'Files:'.
+    while True:
+      if files_match:
+        files_list += files_match.group(1).strip().split()
+        files_match = FILES_PATTERN.search(source, files_match.end())
+      else:
+        break
+    files = [ os.path.normpath(os.path.join(self.root, '..', '..', f))
+              for f in files_list ]
+    testfilename = os.path.join(self.root, testcase.path + self.suffix())
+    if SELF_SCRIPT_PATTERN.search(source):
+      env = ["-e", "TEST_FILE_NAME=\"%s\"" % testfilename]
+      files = env + files
+    files.append(os.path.join(self.root, "mjsunit.js"))
+    files.append(testfilename)
+
+    flags += files
+    if context.isolates:
+      flags.append("--isolate")
+      flags += files
+
+    return testcase.flags + flags
+
+  def GetSourceForTest(self, testcase):
+    filename = os.path.join(self.root, testcase.path + self.suffix())
+    with open(filename) as f:
+      return f.read()
+
+
+def GetSuite(name, root):
+  return MjsunitTestSuite(name, root)
+
+
+# Deprecated definitions below.
+# TODO(jkummerow): Remove when SCons is no longer supported.
+
+
+from os.path import dirname, exists, join, normpath
+import tempfile
+import test
+
+
 class MjsunitTestCase(test.TestCase):
 
   def __init__(self, path, file, mode, context, config, isolates):
diff --git a/deps/v8/test/mjsunit/tools/tickprocessor-test.log b/deps/v8/test/mjsunit/tools/tickprocessor-test.log
index db8be79fa9..5ddad89a55 100644
--- a/deps/v8/test/mjsunit/tools/tickprocessor-test.log
+++ b/deps/v8/test/mjsunit/tools/tickprocessor-test.log
@@ -2,24 +2,24 @@ shared-library,"shell",0x08048000,0x081ee000
 shared-library,"/lib32/libm-2.7.so",0xf7db6000,0xf7dd9000
 shared-library,"ffffe000-fffff000",0xffffe000,0xfffff000
 profiler,"begin",1
-code-creation,Stub,0xf540a100,474,"CEntryStub"
-code-creation,Script,0xf541cd80,736,"exp.js"
-code-creation,Stub,0xf541d0e0,47,"RuntimeStub_Math_exp"
-code-creation,LazyCompile,0xf541d120,145,"exp native math.js:41"
+code-creation,Stub,0,0xf540a100,474,"CEntryStub"
+code-creation,Script,0,0xf541cd80,736,"exp.js"
+code-creation,Stub,0,0xf541d0e0,47,"RuntimeStub_Math_exp"
+code-creation,LazyCompile,0,0xf541d120,145,"exp native math.js:41"
 function-creation,0xf441d280,0xf541d120
-code-creation,LoadIC,0xf541d280,117,"j"
-code-creation,LoadIC,0xf541d360,63,"i"
-tick,0x80f82d1,0xffdfe880,0,0,0,0xf541ce5c
-tick,0x80f89a1,0xffdfecf0,0,0,0,0xf541ce5c
-tick,0x8123b5c,0xffdff1a0,0,0,0,0xf541d1a1,0xf541ceea
-tick,0x8123b65,0xffdff1a0,0,0,0,0xf541d1a1,0xf541ceea
-tick,0xf541d2be,0xffdff1e4,0,0,0
-tick,0xf541d320,0xffdff1dc,0,0,0
-tick,0xf541d384,0xffdff1d8,0,0,0
-tick,0xf7db94da,0xffdff0ec,0,0,0,0xf541d1a1,0xf541ceea
-tick,0xf7db951c,0xffdff0f0,0,0,0,0xf541d1a1,0xf541ceea
-tick,0xf7dbc508,0xffdff14c,0,0,0,0xf541d1a1,0xf541ceea
-tick,0xf7dbff21,0xffdff198,0,0,0,0xf541d1a1,0xf541ceea
-tick,0xf7edec90,0xffdff0ec,0,0,0,0xf541d1a1,0xf541ceea
-tick,0xffffe402,0xffdff488,0,0,0
+code-creation,LoadIC,0,0xf541d280,117,"j"
+code-creation,LoadIC,0,0xf541d360,63,"i"
+tick,0x80f82d1,0xffdfe880,0,0,0,0,0xf541ce5c
+tick,0x80f89a1,0xffdfecf0,0,0,0,0,0xf541ce5c
+tick,0x8123b5c,0xffdff1a0,0,0,0,0,0xf541d1a1,0xf541ceea
+tick,0x8123b65,0xffdff1a0,0,0,0,0,0xf541d1a1,0xf541ceea
+tick,0xf541d2be,0xffdff1e4,0,0,0,0
+tick,0xf541d320,0xffdff1dc,0,0,0,0
+tick,0xf541d384,0xffdff1d8,0,0,0,0
+tick,0xf7db94da,0xffdff0ec,0,0,0,0,0xf541d1a1,0xf541ceea
+tick,0xf7db951c,0xffdff0f0,0,0,0,0,0xf541d1a1,0xf541ceea
+tick,0xf7dbc508,0xffdff14c,0,0,0,0,0xf541d1a1,0xf541ceea
+tick,0xf7dbff21,0xffdff198,0,0,0,0,0xf541d1a1,0xf541ceea
+tick,0xf7edec90,0xffdff0ec,0,0,0,0,0xf541d1a1,0xf541ceea
+tick,0xffffe402,0xffdff488,0,0,0,0
 profiler,"end"
diff --git a/deps/v8/test/mjsunit/uri.js b/deps/v8/test/mjsunit/uri.js
index 178ff1f2a7..fae349f439 100644
--- a/deps/v8/test/mjsunit/uri.js
+++ b/deps/v8/test/mjsunit/uri.js
@@ -76,3 +76,15 @@ assertEquals(cc8_2, decodeURI(encodeURI(s8)).charCodeAt(1));
 assertEquals(cc9_1, decodeURI(encodeURI(s9)).charCodeAt(0));
 assertEquals(cc9_2, decodeURI(encodeURI(s9)).charCodeAt(1));
 assertEquals(cc10, decodeURI(encodeURI(s10)).charCodeAt(0));
+
+assertEquals("", decodeURI(""));
+assertEquals("", encodeURI(""));
+
+function test(string) {
+  assertEquals(string, decodeURI(encodeURI(string)));
+}
+
+test("\u1234\u0123\uabcd");
+test("abcd");
+test("ab<\u1234\u0123");
+test("ab\u1234<\u0123");
diff --git a/deps/v8/test/mozilla/mozilla.status b/deps/v8/test/mozilla/mozilla.status
index 4f2fbdea5a..f915459d61 100644
--- a/deps/v8/test/mozilla/mozilla.status
+++ b/deps/v8/test/mozilla/mozilla.status
@@ -212,6 +212,9 @@ js1_5/Array/regress-101964: PASS || FAIL if $mode == debug
 # This section is for tests that fail in both V8 and JSC.  Thus they
 # have been determined to be incompatible between Mozilla and V8/JSC.
 
+# toPrecision argument restricted to range 1..21 in JSC/V8 and ECMA-262
+js1_5/Regress/regress-452346: FAIL_OK
+
 # Fail because it calls builtins as functions and do not expect the
 # builtin to have undefined as the receiver.
 ecma/String/15.5.4.6-2: FAIL_OK
@@ -245,13 +248,6 @@ js1_5/Function/regress-338121-03: FAIL_OK
 # Expectes 'prototype' property of functions to be enumerable.
 js1_5/Function/10.1.6-01: FAIL_OK
 
-# toPrecision argument restricted to range 1..21 in JSC/V8
-js1_5/Regress/regress-452346: FAIL_OK
-ecma_3/Number/15.7.4.7-1: FAIL_OK
-
-# toExponential argument restricted to range 0..20 in JSC/V8
-ecma_3/Number/15.7.4.6-1: FAIL_OK
-
 #:=== RegExp:===
 # We don't match the syntax error message of Mozilla for invalid
 # RegExp flags.
diff --git a/deps/v8/test/mozilla/testcfg.py b/deps/v8/test/mozilla/testcfg.py
index e88164d22c..5aeac4cc67 100644
--- a/deps/v8/test/mozilla/testcfg.py
+++ b/deps/v8/test/mozilla/testcfg.py
@@ -26,12 +26,19 @@
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 
-import test
 import os
-from os.path import join, exists
+import shutil
+import subprocess
+import tarfile
+
+from testrunner.local import testsuite
+from testrunner.objects import testcase
+
 
+MOZILLA_VERSION = "2010-06-29"
 
-EXCLUDED = ['CVS']
+
+EXCLUDED = ["CVS"]
 
 
 FRAMEWORK = """
@@ -54,6 +61,117 @@ TEST_DIRS = """
 """.split()
 
 
+class MozillaTestSuite(testsuite.TestSuite):
+
+  def __init__(self, name, root):
+    super(MozillaTestSuite, self).__init__(name, root)
+    self.testroot = os.path.join(root, "data")
+
+  def ListTests(self, context):
+    tests = []
+    for testdir in TEST_DIRS:
+      current_root = os.path.join(self.testroot, testdir)
+      for dirname, dirs, files in os.walk(current_root):
+        for dotted in [x for x in dirs if x.startswith(".")]:
+          dirs.remove(dotted)
+        for excluded in EXCLUDED:
+          if excluded in dirs:
+            dirs.remove(excluded)
+        dirs.sort()
+        files.sort()
+        for filename in files:
+          if filename.endswith(".js") and not filename in FRAMEWORK:
+            testname = os.path.join(dirname[len(self.testroot) + 1:],
+                                    filename[:-3])
+            case = testcase.TestCase(self, testname)
+            tests.append(case)
+    return tests
+
+  def GetFlagsForTestCase(self, testcase, context):
+    result = []
+    result += context.mode_flags
+    result += ["--expose-gc"]
+    result += [os.path.join(self.root, "mozilla-shell-emulation.js")]
+    testfilename = testcase.path + ".js"
+    testfilepath = testfilename.split(os.path.sep)
+    for i in xrange(len(testfilepath)):
+      script = os.path.join(self.testroot,
+                            reduce(os.path.join, testfilepath[:i], ""),
+                            "shell.js")
+      if os.path.exists(script):
+        result.append(script)
+    result.append(os.path.join(self.testroot, testfilename))
+    return testcase.flags + result
+
+  def GetSourceForTest(self, testcase):
+    filename = join(self.testroot, testcase.path + ".js")
+    with open(filename) as f:
+      return f.read()
+
+  def IsNegativeTest(self, testcase):
+    return testcase.path.endswith("-n")
+
+  def IsFailureOutput(self, output, testpath):
+    if output.exit_code != 0:
+      return True
+    return "FAILED!" in output.stdout
+
+  def DownloadData(self):
+    old_cwd = os.getcwd()
+    os.chdir(os.path.abspath(self.root))
+
+    # Maybe we're still up to date?
+    versionfile = "CHECKED_OUT_VERSION"
+    checked_out_version = None
+    if os.path.exists(versionfile):
+      with open(versionfile) as f:
+        checked_out_version = f.read()
+    if checked_out_version == MOZILLA_VERSION:
+      os.chdir(old_cwd)
+      return
+
+    # If we have a local archive file with the test data, extract it.
+    directory_name = "data"
+    if os.path.exists(directory_name):
+      os.rename(directory_name, "data.old")
+    archive_file = "downloaded_%s.tar.gz" % MOZILLA_VERSION
+    if os.path.exists(archive_file):
+      with tarfile.open(archive_file, "r:gz") as tar:
+        tar.extractall()
+      with open(versionfile, "w") as f:
+        f.write(MOZILLA_VERSION)
+      os.chdir(old_cwd)
+      return
+
+    # No cached copy. Check out via CVS, and pack as .tar.gz for later use.
+    command = ("cvs -d :pserver:anonymous@cvs-mirror.mozilla.org:/cvsroot"
+               " co -D %s mozilla/js/tests" % MOZILLA_VERSION)
+    code = subprocess.call(command, shell=True)
+    if code != 0:
+      os.chdir(old_cwd)
+      raise Exception("Error checking out Mozilla test suite!")
+    os.rename(join("mozilla", "js", "tests"), directory_name)
+    shutil.rmtree("mozilla")
+    with tarfile.open(archive_file, "w:gz") as tar:
+      tar.add("data")
+    with open(versionfile, "w") as f:
+      f.write(MOZILLA_VERSION)
+    os.chdir(old_cwd)
+
+
+def GetSuite(name, root):
+  return MozillaTestSuite(name, root)
+
+
+# Deprecated definitions below.
+# TODO(jkummerow): Remove when SCons is no longer supported.
+
+
+from os.path import exists
+from os.path import join
+import test
+
+
 class MozillaTestCase(test.TestCase):
 
   def __init__(self, filename, path, context, root, mode, framework):
diff --git a/deps/v8/test/preparser/preparser.status b/deps/v8/test/preparser/preparser.status
index 6f15fedd8f..40c5caf742 100644
--- a/deps/v8/test/preparser/preparser.status
+++ b/deps/v8/test/preparser/preparser.status
@@ -31,3 +31,8 @@ prefix preparser
 # escapes (we need to parse to distinguish octal escapes from valid
 # back-references).
 strict-octal-regexp: FAIL
+
+[ $arch == android_arm || $arch == android_ia32 ]
+# Remove this once the issue above is fixed. Android test runner does not
+# handle "FAIL" test expectation correctly.
+strict-octal-regexp: SKIP
diff --git a/deps/v8/test/preparser/testcfg.py b/deps/v8/test/preparser/testcfg.py
index 88c06a31ad..61c14c9bd3 100644
--- a/deps/v8/test/preparser/testcfg.py
+++ b/deps/v8/test/preparser/testcfg.py
@@ -25,13 +25,109 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-import test
+
 import os
-from os.path import join, dirname, exists, isfile
-import platform
-import utils
 import re
 
+from testrunner.local import testsuite
+from testrunner.local import utils
+from testrunner.objects import testcase
+
+
+class PreparserTestSuite(testsuite.TestSuite):
+  def __init__(self, name, root):
+    super(PreparserTestSuite, self).__init__(name, root)
+
+  def shell(self):
+    return "preparser"
+
+  def _GetExpectations(self):
+    expects_file = join(self.root, "preparser.expectation")
+    expectations_map = {}
+    if not os.path.exists(expects_file): return expectations_map
+    rule_regex = re.compile("^([\w\-]+)(?::([\w\-]+))?(?::(\d+),(\d+))?$")
+    for line in utils.ReadLinesFrom(expects_file):
+      rule_match = rule_regex.match(line)
+      if not rule_match: continue
+      expects = []
+      if (rule_match.group(2)):
+        expects += [rule_match.group(2)]
+        if (rule_match.group(3)):
+          expects += [rule_match.group(3), rule_match.group(4)]
+      expectations_map[rule_match.group(1)] = " ".join(expects)
+    return expectations_map
+
+  def _ParsePythonTestTemplates(self, result, filename):
+    pathname = join(self.root, filename + ".pyt")
+    def Test(name, source, expectation):
+      source = source.replace("\n", " ")
+      testname = os.path.join(filename, name)
+      flags = ["-e", source]
+      if expectation:
+        flags += ["throws", expectation]
+      test = testcase.TestCase(self, testname, flags=flags)
+      result.append(test)
+    def Template(name, source):
+      def MkTest(replacement, expectation):
+        testname = name
+        testsource = source
+        for key in replacement.keys():
+          testname = testname.replace("$" + key, replacement[key]);
+          testsource = testsource.replace("$" + key, replacement[key]);
+        Test(testname, testsource, expectation)
+      return MkTest
+    execfile(pathname, {"Test": Test, "Template": Template})
+
+  def ListTests(self, context):
+    expectations = self._GetExpectations()
+    result = []
+
+    # Find all .js files in this directory.
+    filenames = [f[:-3] for f in os.listdir(self.root) if f.endswith(".js")]
+    filenames.sort()
+    for f in filenames:
+      throws = expectations.get(f, None)
+      flags = [f + ".js"]
+      if throws:
+        flags += ["throws", throws]
+      test = testcase.TestCase(self, f, flags=flags)
+      result.append(test)
+
+    # Find all .pyt files in this directory.
+    filenames = [f[:-4] for f in os.listdir(self.root) if f.endswith(".pyt")]
+    filenames.sort()
+    for f in filenames:
+      self._ParsePythonTestTemplates(result, f)
+    return result
+
+  def GetFlagsForTestCase(self, testcase, context):
+    first = testcase.flags[0]
+    if first != "-e":
+      testcase.flags[0] = os.path.join(self.root, first)
+    return testcase.flags
+
+  def GetSourceForTest(self, testcase):
+    if testcase.flags[0] == "-e":
+      return testcase.flags[1]
+    with open(testcase.flags[0]) as f:
+      return f.read()
+
+  def VariantFlags(self):
+    return [[]];
+
+
+def GetSuite(name, root):
+  return PreparserTestSuite(name, root)
+
+
+# Deprecated definitions below.
+# TODO(jkummerow): Remove when SCons is no longer supported.
+
+
+from os.path import join, exists, isfile
+import test
+
+
 class PreparserTestCase(test.TestCase):
 
   def __init__(self, root, path, executable, mode, throws, context, source):
@@ -50,7 +146,7 @@ class PreparserTestCase(test.TestCase):
   def HasSource(self):
     return self.source is not None
 
-  def GetSource():
+  def GetSource(self):
     return self.source
 
   def BuildCommand(self, path):
diff --git a/deps/v8/test/sputnik/testcfg.py b/deps/v8/test/sputnik/testcfg.py
index 1032c134f6..b6f374667c 100644
--- a/deps/v8/test/sputnik/testcfg.py
+++ b/deps/v8/test/sputnik/testcfg.py
@@ -33,6 +33,11 @@ import test
 import time
 
 
+def GetSuite(name, root):
+  # Not implemented.
+  return None
+
+
 class SputnikTestCase(test.TestCase):
 
   def __init__(self, case, path, context, mode):
diff --git a/deps/v8/test/test262/README b/deps/v8/test/test262/README
index 59e7f5eb8b..1ddbc709be 100644
--- a/deps/v8/test/test262/README
+++ b/deps/v8/test/test262/README
@@ -4,11 +4,11 @@ tests from
 
   http://hg.ecmascript.org/tests/test262
 
-at revision 334 as 'data' in this directory.  Using later version
+at revision 360 as 'data' in this directory.  Using later version
 may be possible but the tests are only known to pass (and indeed run)
 with that revision.
 
-hg clone -r 334 http://hg.ecmascript.org/tests/test262 data
+hg clone -r 360 http://hg.ecmascript.org/tests/test262 data
 
 If you do update to a newer revision you may have to change the test
 harness adapter code since it uses internal functionality from the
diff --git a/deps/v8/test/test262/test262.status b/deps/v8/test/test262/test262.status
index 06b43c717e..8eaa3657fa 100644
--- a/deps/v8/test/test262/test262.status
+++ b/deps/v8/test/test262/test262.status
@@ -39,14 +39,20 @@ S15.12.2_A1: FAIL
 # V8 Bug: http://code.google.com/p/v8/issues/detail?id=691
 11.2.3-3_3: FAIL
 
+# Strings that are considered canonically equivalent by the Unicode standard
+# return a non-zero value on String.prototype.localeCompare calls.
+# V8 Bug: http://code.google.com/p/v8/issues/detail?id=2413
+15.5.4.9_CE: FAIL
+
 ##################### DELIBERATE INCOMPATIBILITIES #####################
 
-# This tests precision of Math.tan and Math.sin.  The implementation for those
+# This tests precision of Math functions.  The implementation for those
 # trigonometric functions are platform/compiler dependent.  Furthermore, the
 # expectation values by far deviates from the actual result given by an
 # arbitrary-precision calculator, making those tests partly bogus.
-S15.8.2.16_A7: PASS || FAIL_OK
-S15.8.2.18_A7: PASS || FAIL_OK
+S15.8.2.8_A6: PASS || FAIL_OK   # Math.exp (less precise with --fast-math)
+S15.8.2.16_A7: PASS || FAIL_OK  # Math.sin
+S15.8.2.18_A7: PASS || FAIL_OK  # Math.tan
 
 # Linux for ia32 (and therefore simulators) default to extended 80 bit floating
 # point formats, so these tests checking 64-bit FP precision fail. The other
diff --git a/deps/v8/test/test262/testcfg.py b/deps/v8/test/test262/testcfg.py
index c394cc8a5f..f937442f5d 100644
--- a/deps/v8/test/test262/testcfg.py
+++ b/deps/v8/test/test262/testcfg.py
@@ -26,19 +26,110 @@
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 
-import test
-import os
-from os.path import join, exists
-import urllib
 import hashlib
+import os
 import sys
 import tarfile
+import urllib
+
+from testrunner.local import testsuite
+from testrunner.objects import testcase
+
+
+TEST_262_ARCHIVE_REVISION = "53c4ade82d14"  # This is the r360 revision.
+TEST_262_ARCHIVE_MD5 = "5fa4918b00e5d60e57bdd3c05deaeb0c"
+TEST_262_URL = "http://hg.ecmascript.org/tests/test262/archive/%s.tar.bz2"
+TEST_262_HARNESS = ["sta.js", "testBuiltInObject.js"]
+TEST_262_SKIP = ["intl402"]
+
+
+class Test262TestSuite(testsuite.TestSuite):
+
+  def __init__(self, name, root):
+    super(Test262TestSuite, self).__init__(name, root)
+    self.testroot = os.path.join(root, "data", "test", "suite")
+    self.harness = [os.path.join(self.root, "data", "test", "harness", f)
+                    for f in TEST_262_HARNESS]
+    self.harness += [os.path.join(self.root, "harness-adapt.js")]
+
+  def CommonTestName(self, testcase):
+    return testcase.path.split(os.path.sep)[-1]
 
+  def ListTests(self, context):
+    tests = []
+    for dirname, dirs, files in os.walk(self.testroot):
+      for dotted in [x for x in dirs if x.startswith(".")]:
+        dirs.remove(dotted)
+      for skipped in [x for x in dirs if x in TEST_262_SKIP]:
+        dirs.remove(skipped)
+      dirs.sort()
+      files.sort()
+      for filename in files:
+        if filename.endswith(".js"):
+          testname = os.path.join(dirname[len(self.testroot) + 1:],
+                                  filename[:-3])
+          case = testcase.TestCase(self, testname)
+          tests.append(case)
+    return tests
+
+  def GetFlagsForTestCase(self, testcase, context):
+    return (testcase.flags + context.mode_flags + self.harness +
+            [os.path.join(self.testroot, testcase.path + ".js")])
+
+  def GetSourceForTest(self, testcase):
+    filename = os.path.join(self.testroot, testcase.path + ".js")
+    with open(filename) as f:
+      return f.read()
+
+  def IsNegativeTest(self, testcase):
+    return "@negative" in self.GetSourceForTest(testcase)
+
+  def IsFailureOutput(self, output, testpath):
+    if output.exit_code != 0:
+      return True
+    return "FAILED!" in output.stdout
 
-TEST_262_ARCHIVE_REVISION = 'fb327c439e20'  # This is the r334 revision.
-TEST_262_ARCHIVE_MD5 = '307acd166ec34629592f240dc12d57ed'
-TEST_262_URL = 'http://hg.ecmascript.org/tests/test262/archive/%s.tar.bz2'
-TEST_262_HARNESS = ['sta.js']
+  def DownloadData(self):
+    revision = TEST_262_ARCHIVE_REVISION
+    archive_url = TEST_262_URL % revision
+    archive_name = os.path.join(self.root, "test262-%s.tar.bz2" % revision)
+    directory_name = os.path.join(self.root, "data")
+    directory_old_name = os.path.join(self.root, "data.old")
+    if not os.path.exists(archive_name):
+      print "Downloading test data from %s ..." % archive_url
+      urllib.urlretrieve(archive_url, archive_name)
+      if os.path.exists(directory_name):
+        os.rename(directory_name, directory_old_name)
+    if not os.path.exists(directory_name):
+      print "Extracting test262-%s.tar.bz2 ..." % revision
+      md5 = hashlib.md5()
+      with open(archive_name, "rb") as f:
+        for chunk in iter(lambda: f.read(8192), ""):
+          md5.update(chunk)
+      if md5.hexdigest() != TEST_262_ARCHIVE_MD5:
+        os.remove(archive_name)
+        raise Exception("Hash mismatch of test data file")
+      archive = tarfile.open(archive_name, "r:bz2")
+      if sys.platform in ("win32", "cygwin"):
+        # Magic incantation to allow longer path names on Windows.
+        archive.extractall(u"\\\\?\\%s" % self.root)
+      else:
+        archive.extractall(self.root)
+      os.rename(os.path.join(self.root, "test262-%s" % revision),
+                directory_name)
+
+
+def GetSuite(name, root):
+  return Test262TestSuite(name, root)
+
+
+# Deprecated definitions below.
+# TODO(jkummerow): Remove when SCons is no longer supported.
+
+
+from os.path import exists
+from os.path import join
+import test
 
 
 class Test262TestCase(test.TestCase):
@@ -88,6 +179,8 @@ class Test262TestConfiguration(test.TestConfiguration):
     for root, dirs, files in os.walk(testroot):
       for dotted in [x for x in dirs if x.startswith('.')]:
         dirs.remove(dotted)
+      for skipped in [x for x in dirs if x in TEST_262_SKIP]:
+        dirs.remove(skipped)
       dirs.sort()
       root_path = root[len(self.root):].split(os.path.sep)
       root_path = current_path + [x for x in root_path if x]
diff --git a/deps/v8/tools/android-build.sh b/deps/v8/tools/android-build.sh
index e69de29bb2..e69de29bb2 100644..100755
--- a/deps/v8/tools/android-build.sh
+++ b/deps/v8/tools/android-build.sh
diff --git a/deps/v8/tools/android-ll-prof.sh b/deps/v8/tools/android-ll-prof.sh
index 78790ecb62..436f262bb3 100644..100755
--- a/deps/v8/tools/android-ll-prof.sh
+++ b/deps/v8/tools/android-ll-prof.sh
@@ -60,7 +60,7 @@ adb pull /data/local/tmp/v8/v8.log .
 adb pull /data/local/tmp/v8/v8.log.ll .
 adb pull /data/perf.data .
 
-ARCH=arm-linux-androideabi-4.4.3
+ARCH=arm-linux-androideabi-4.6
 TOOLCHAIN="${ANDROID_NDK_ROOT}/toolchains/$ARCH/prebuilt/linux-x86/bin"
 
 $BASE/tools/ll_prof.py --host-root="$BASE/deploy" \
diff --git a/deps/v8/tools/android-run.py b/deps/v8/tools/android-run.py
index 1693c5b064..1693c5b064 100644..100755
--- a/deps/v8/tools/android-run.py
+++ b/deps/v8/tools/android-run.py
diff --git a/deps/v8/tools/android-sync.sh b/deps/v8/tools/android-sync.sh
index 5d4ef2effd..5d4ef2effd 100644..100755
--- a/deps/v8/tools/android-sync.sh
+++ b/deps/v8/tools/android-sync.sh
diff --git a/deps/v8/tools/bash-completion.sh b/deps/v8/tools/bash-completion.sh
index 9f65c67731..9f65c67731 100644..100755
--- a/deps/v8/tools/bash-completion.sh
+++ b/deps/v8/tools/bash-completion.sh
diff --git a/deps/v8/tools/check-static-initializers.sh b/deps/v8/tools/check-static-initializers.sh
index 1103a97787..1103a97787 100644..100755
--- a/deps/v8/tools/check-static-initializers.sh
+++ b/deps/v8/tools/check-static-initializers.sh
diff --git a/deps/v8/tools/common-includes.sh b/deps/v8/tools/common-includes.sh
index 2b806caa5f..7785e9fc30 100644
--- a/deps/v8/tools/common-includes.sh
+++ b/deps/v8/tools/common-includes.sh
@@ -36,9 +36,7 @@ TEMP_BRANCH=$BRANCHNAME-temporary-branch-created-by-script
 VERSION_FILE="src/version.cc"
 CHANGELOG_ENTRY_FILE="$PERSISTFILE_BASENAME-changelog-entry"
 PATCH_FILE="$PERSISTFILE_BASENAME-patch"
-PATCH_OUTPUT_FILE="$PERSISTFILE_BASENAME-patch-output"
 COMMITMSG_FILE="$PERSISTFILE_BASENAME-commitmsg"
-TOUCHED_FILES_FILE="$PERSISTFILE_BASENAME-touched-files"
 TRUNK_REVISION_FILE="$PERSISTFILE_BASENAME-trunkrevision"
 START_STEP=0
 CURRENT_STEP=0
@@ -180,26 +178,21 @@ the uploaded CL."
   done
 }
 
-# Takes a file containing the patch to apply as first argument.
-apply_patch() {
-  patch $REVERSE_PATCH -p1 < "$1" > "$PATCH_OUTPUT_FILE" || \
-    { cat "$PATCH_OUTPUT_FILE" && die "Applying the patch failed."; }
-  tee < "$PATCH_OUTPUT_FILE" >(grep "patching file" \
-                               | awk '{print $NF}' >> "$TOUCHED_FILES_FILE")
-  rm "$PATCH_OUTPUT_FILE"
+wait_for_resolving_conflicts() {
+  echo "Applying the patch \"$1\" failed. Either type \"ABORT<Return>\", or \
+resolve the conflicts, stage *all* touched files with 'git add', and \
+type \"RESOLVED<Return>\""
+  unset ANSWER
+  while [ "$ANSWER" != "RESOLVED" ] ; do
+    [[ "$ANSWER" == "ABORT" ]] && die "Applying the patch failed."
+    [[ -n "$ANSWER" ]] && echo "That was not 'RESOLVED' or 'ABORT'."
+    echo -n "> "
+    read ANSWER
+  done
 }
 
-stage_files() {
-  # Stage added and modified files.
-  TOUCHED_FILES=$(cat "$TOUCHED_FILES_FILE")
-  for FILE in $TOUCHED_FILES ; do
-    git add "$FILE"
-  done
-  # Stage deleted files.
-  DELETED_FILES=$(git status -s -uno --porcelain | grep "^ D" \
-                                                 | awk '{print $NF}')
-  for FILE in $DELETED_FILES ; do
-    git rm "$FILE"
-  done
-  rm -f "$TOUCHED_FILES_FILE"
+# Takes a file containing the patch to apply as first argument.
+apply_patch() {
+  git apply --index --reject $REVERSE_PATCH "$1" || \
+    wait_for_resolving_conflicts "$1";
 }
diff --git a/deps/v8/tools/fuzz-harness.sh b/deps/v8/tools/fuzz-harness.sh
index efbf8646ce..efbf8646ce 100644..100755
--- a/deps/v8/tools/fuzz-harness.sh
+++ b/deps/v8/tools/fuzz-harness.sh
diff --git a/deps/v8/tools/gen-postmortem-metadata.py b/deps/v8/tools/gen-postmortem-metadata.py
index 3145610c5d..b4b79aada4 100644
--- a/deps/v8/tools/gen-postmortem-metadata.py
+++ b/deps/v8/tools/gen-postmortem-metadata.py
@@ -61,7 +61,7 @@ consts_misc = [
 
     { 'name': 'StringEncodingMask',     'value': 'kStringEncodingMask' },
     { 'name': 'TwoByteStringTag',       'value': 'kTwoByteStringTag' },
-    { 'name': 'AsciiStringTag',         'value': 'kAsciiStringTag' },
+    { 'name': 'AsciiStringTag',         'value': 'kOneByteStringTag' },
 
     { 'name': 'StringRepresentationMask',
         'value': 'kStringRepresentationMask' },
@@ -76,25 +76,13 @@ consts_misc = [
     { 'name': 'SmiTag',                 'value': 'kSmiTag' },
     { 'name': 'SmiTagMask',             'value': 'kSmiTagMask' },
     { 'name': 'SmiValueShift',          'value': 'kSmiTagSize' },
+    { 'name': 'SmiShiftSize',           'value': 'kSmiShiftSize' },
     { 'name': 'PointerSizeLog2',        'value': 'kPointerSizeLog2' },
 
-    { 'name': 'transitions_idx_descriptors',
-        'value': 'TransitionArray::kDescriptorsIndex' },
-
-    { 'name': 'prop_desc_key',
-        'value': 'DescriptorArray::kDescriptorKey' },
-    { 'name': 'prop_desc_details',
-        'value': 'DescriptorArray::kDescriptorDetails' },
-    { 'name': 'prop_desc_value',
-        'value': 'DescriptorArray::kDescriptorValue' },
-    { 'name': 'prop_desc_size',
-        'value': 'DescriptorArray::kDescriptorSize' },
     { 'name': 'prop_idx_first',
         'value': 'DescriptorArray::kFirstIndex' },
     { 'name': 'prop_type_field',
         'value': 'FIELD' },
-    { 'name': 'prop_type_first_phantom',
-        'value': 'Code::MAP_TRANSITION' },
     { 'name': 'prop_type_mask',
         'value': 'PropertyDetails::TypeField::kMask' },
 
@@ -116,14 +104,13 @@ extras_accessors = [
     'JSObject, elements, Object, kElementsOffset',
     'FixedArray, data, uintptr_t, kHeaderSize',
     'Map, instance_attributes, int, kInstanceAttributesOffset',
-    'Map, transitions, uintptr_t, kTransitionsOrBackPointerOffset',
     'Map, inobject_properties, int, kInObjectPropertiesOffset',
     'Map, instance_size, int, kInstanceSizeOffset',
     'HeapNumber, value, double, kValueOffset',
     'ConsString, first, String, kFirstOffset',
     'ConsString, second, String, kSecondOffset',
     'ExternalString, resource, Object, kResourceOffset',
-    'SeqAsciiString, chars, char, kHeaderSize',
+    'SeqOneByteString, chars, char, kHeaderSize',
     'SharedFunctionInfo, code, Code, kCodeOffset',
     'Code, instruction_start, uintptr_t, kHeaderSize',
     'Code, instruction_size, int, kInstructionSizeOffset',
@@ -137,7 +124,7 @@ extras_accessors = [
 expected_classes = [
     'ConsString', 'FixedArray', 'HeapNumber', 'JSArray', 'JSFunction',
     'JSObject', 'JSRegExp', 'JSValue', 'Map', 'Oddball', 'Script',
-    'SeqAsciiString', 'SharedFunctionInfo'
+    'SeqOneByteString', 'SharedFunctionInfo'
 ];
 
 
@@ -302,7 +289,7 @@ def load_objects():
                             cctype.find('Sliced') == -1):
                                 if (cctype.find('Ascii') != -1):
                                         cctype = re.sub('AsciiString$',
-                                            'SeqAsciiString', cctype);
+                                            'SeqOneByteString', cctype);
                                 else:
                                         cctype = re.sub('String$',
                                             'SeqString', cctype);
diff --git a/deps/v8/tools/grokdump.py b/deps/v8/tools/grokdump.py
index 5d9a053afd..b51e4e0e7f 100755
--- a/deps/v8/tools/grokdump.py
+++ b/deps/v8/tools/grokdump.py
@@ -27,17 +27,18 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+import bisect
 import cmd
+import codecs
 import ctypes
+import disasm
 import mmap
 import optparse
 import os
-import disasm
-import sys
-import types
-import codecs
 import re
 import struct
+import sys
+import types
 
 
 USAGE="""usage: %prog [OPTIONS] [DUMP-FILE]
@@ -180,6 +181,11 @@ MINIDUMP_LOCATION_DESCRIPTOR = Descriptor([
   ("rva", ctypes.c_uint32)
 ])
 
+MINIDUMP_STRING = Descriptor([
+  ("length", ctypes.c_uint32),
+  ("buffer", lambda t: ctypes.c_uint8 * (t.length + 2))
+])
+
 MINIDUMP_DIRECTORY = Descriptor([
   ("stream_type", ctypes.c_uint32),
   ("location", MINIDUMP_LOCATION_DESCRIPTOR.ctype)
@@ -400,6 +406,24 @@ MINIDUMP_THREAD_LIST = Descriptor([
   ("threads", lambda t: MINIDUMP_THREAD.ctype * t.thread_count)
 ])
 
+MINIDUMP_RAW_MODULE = Descriptor([
+  ("base_of_image", ctypes.c_uint64),
+  ("size_of_image", ctypes.c_uint32),
+  ("checksum", ctypes.c_uint32),
+  ("time_date_stamp", ctypes.c_uint32),
+  ("module_name_rva", ctypes.c_uint32),
+  ("version_info", ctypes.c_uint32 * 13),
+  ("cv_record", MINIDUMP_LOCATION_DESCRIPTOR.ctype),
+  ("misc_record", MINIDUMP_LOCATION_DESCRIPTOR.ctype),
+  ("reserved0", ctypes.c_uint32 * 2),
+  ("reserved1", ctypes.c_uint32 * 2)
+])
+
+MINIDUMP_MODULE_LIST = Descriptor([
+  ("number_of_modules", ctypes.c_uint32),
+  ("modules", lambda t: MINIDUMP_RAW_MODULE.ctype * t.number_of_modules)
+])
+
 MINIDUMP_RAW_SYSTEM_INFO = Descriptor([
   ("processor_architecture", ctypes.c_uint16)
 ])
@@ -407,6 +431,20 @@ MINIDUMP_RAW_SYSTEM_INFO = Descriptor([
 MD_CPU_ARCHITECTURE_X86 = 0
 MD_CPU_ARCHITECTURE_AMD64 = 9
 
+class FuncSymbol:
+  def __init__(self, start, size, name):
+    self.start = start
+    self.end = self.start + size
+    self.name = name
+
+  def __cmp__(self, other):
+    if isinstance(other, FuncSymbol):
+      return self.start - other.start
+    return self.start - other
+
+  def Covers(self, addr):
+    return (self.start <= addr) and (addr < self.end)
+
 class MinidumpReader(object):
   """Minidump (.dmp) reader."""
 
@@ -430,8 +468,13 @@ class MinidumpReader(object):
     self.exception_context = None
     self.memory_list = None
     self.memory_list64 = None
+    self.module_list = None
     self.thread_map = {}
 
+    self.symdir = options.symdir
+    self.modules_with_symbols = []
+    self.symbols = []
+
     # Find MDRawSystemInfo stream and determine arch.
     for d in directories:
       if d.stream_type == MD_SYSTEM_INFO_STREAM:
@@ -461,6 +504,11 @@ class MinidumpReader(object):
         for thread in thread_list.threads:
           DebugPrint(thread)
           self.thread_map[thread.id] = thread
+      elif d.stream_type == MD_MODULE_LIST_STREAM:
+        assert self.module_list is None
+        self.module_list = MINIDUMP_MODULE_LIST.Read(
+          self.minidump, d.location.rva)
+        assert ctypes.sizeof(self.module_list) == d.location.data_size
       elif d.stream_type == MD_MEMORY_LIST_STREAM:
         print >>sys.stderr, "Warning: This is not a full minidump!"
         assert self.memory_list is None
@@ -644,6 +692,66 @@ class MinidumpReader(object):
   def Register(self, name):
     return self.exception_context.__getattribute__(name)
 
+  def ReadMinidumpString(self, rva):
+    string = bytearray(MINIDUMP_STRING.Read(self.minidump, rva).buffer)
+    string = string.decode("utf16")
+    return string[0:len(string) - 1]
+
+  # Load FUNC records from a BreakPad symbol file
+  #
+  #    http://code.google.com/p/google-breakpad/wiki/SymbolFiles
+  #
+  def _LoadSymbolsFrom(self, symfile, baseaddr):
+    print "Loading symbols from %s" % (symfile)
+    funcs = []
+    with open(symfile) as f:
+      for line in f:
+        result = re.match(
+            r"^FUNC ([a-f0-9]+) ([a-f0-9]+) ([a-f0-9]+) (.*)$", line)
+        if result is not None:
+          start = int(result.group(1), 16)
+          size = int(result.group(2), 16)
+          name = result.group(4).rstrip()
+          bisect.insort_left(self.symbols,
+                             FuncSymbol(baseaddr + start, size, name))
+    print " ... done"
+
+  def TryLoadSymbolsFor(self, modulename, module):
+    try:
+      symfile = os.path.join(self.symdir,
+                             modulename.replace('.', '_') + ".pdb.sym")
+      self._LoadSymbolsFrom(symfile, module.base_of_image)
+      self.modules_with_symbols.append(module)
+    except Exception as e:
+      print "  ... failure (%s)" % (e)
+
+  # Returns true if address is covered by some module that has loaded symbols.
+  def _IsInModuleWithSymbols(self, addr):
+    for module in self.modules_with_symbols:
+      start = module.base_of_image
+      end = start + module.size_of_image
+      if (start <= addr) and (addr < end):
+        return True
+    return False
+
+  # Find symbol covering the given address and return its name in format
+  #     <symbol name>+<offset from the start>
+  def FindSymbol(self, addr):
+    if not self._IsInModuleWithSymbols(addr):
+      return None
+
+    i = bisect.bisect_left(self.symbols, addr)
+    symbol = None
+    if (0 < i) and self.symbols[i - 1].Covers(addr):
+      symbol = self.symbols[i - 1]
+    elif (i < len(self.symbols)) and self.symbols[i].Covers(addr):
+      symbol = self.symbols[i]
+    else:
+      return None
+    diff = addr - symbol.start
+    return "%s+0x%x" % (symbol.name, diff)
+
+
 
 # List of V8 instance types. Obtained by adding the code below to any .cc file.
 #
@@ -755,80 +863,83 @@ INSTANCE_TYPES = {
 # }
 # printf("}\n");
 KNOWN_MAPS = {
-  0x08081: (134, "ByteArrayMap"),
-  0x080a1: (128, "MetaMap"),
-  0x080c1: (130, "OddballMap"),
-  0x080e1: (163, "FixedArrayMap"),
-  0x08101: (68, "AsciiSymbolMap"),
-  0x08121: (132, "HeapNumberMap"),
-  0x08141: (135, "FreeSpaceMap"),
-  0x08161: (146, "OnePointerFillerMap"),
-  0x08181: (146, "TwoPointerFillerMap"),
-  0x081a1: (131, "GlobalPropertyCellMap"),
-  0x081c1: (164, "SharedFunctionInfoMap"),
-  0x081e1: (4, "AsciiStringMap"),
-  0x08201: (163, "GlobalContextMap"),
-  0x08221: (129, "CodeMap"),
-  0x08241: (163, "ScopeInfoMap"),
-  0x08261: (163, "FixedCOWArrayMap"),
-  0x08281: (145, "FixedDoubleArrayMap"),
-  0x082a1: (163, "HashTableMap"),
-  0x082c1: (0, "StringMap"),
-  0x082e1: (64, "SymbolMap"),
-  0x08301: (1, "ConsStringMap"),
-  0x08321: (5, "ConsAsciiStringMap"),
-  0x08341: (3, "SlicedStringMap"),
-  0x08361: (7, "SlicedAsciiStringMap"),
-  0x08381: (65, "ConsSymbolMap"),
-  0x083a1: (69, "ConsAsciiSymbolMap"),
-  0x083c1: (66, "ExternalSymbolMap"),
-  0x083e1: (74, "ExternalSymbolWithAsciiDataMap"),
-  0x08401: (70, "ExternalAsciiSymbolMap"),
-  0x08421: (2, "ExternalStringMap"),
-  0x08441: (10, "ExternalStringWithAsciiDataMap"),
-  0x08461: (6, "ExternalAsciiStringMap"),
-  0x08481: (82, "ShortExternalSymbolMap"),
-  0x084a1: (90, "ShortExternalSymbolWithAsciiDataMap"),
-  0x084c1: (86, "ShortExternalAsciiSymbolMap"),
-  0x084e1: (18, "ShortExternalStringMap"),
-  0x08501: (26, "ShortExternalStringWithAsciiDataMap"),
-  0x08521: (22, "ShortExternalAsciiStringMap"),
-  0x08541: (0, "UndetectableStringMap"),
-  0x08561: (4, "UndetectableAsciiStringMap"),
-  0x08581: (144, "ExternalPixelArrayMap"),
-  0x085a1: (136, "ExternalByteArrayMap"),
-  0x085c1: (137, "ExternalUnsignedByteArrayMap"),
-  0x085e1: (138, "ExternalShortArrayMap"),
-  0x08601: (139, "ExternalUnsignedShortArrayMap"),
-  0x08621: (140, "ExternalIntArrayMap"),
-  0x08641: (141, "ExternalUnsignedIntArrayMap"),
-  0x08661: (142, "ExternalFloatArrayMap"),
-  0x08681: (143, "ExternalDoubleArrayMap"),
-  0x086a1: (163, "NonStrictArgumentsElementsMap"),
-  0x086c1: (163, "FunctionContextMap"),
-  0x086e1: (163, "CatchContextMap"),
-  0x08701: (163, "WithContextMap"),
-  0x08721: (163, "BlockContextMap"),
-  0x08741: (163, "ModuleContextMap"),
-  0x08761: (165, "JSMessageObjectMap"),
-  0x08781: (133, "ForeignMap"),
-  0x087a1: (170, "NeanderMap"),
-  0x087c1: (158, "PolymorphicCodeCacheMap"),
-  0x087e1: (156, "ScriptMap"),
-  0x08801: (147, "AccessorInfoMap"),
-  0x08821: (148, "AccessorPairMap"),
-  0x08841: (149, "AccessCheckInfoMap"),
-  0x08861: (150, "InterceptorInfoMap"),
-  0x08881: (151, "CallHandlerInfoMap"),
-  0x088a1: (152, "FunctionTemplateInfoMap"),
-  0x088c1: (153, "ObjectTemplateInfoMap"),
-  0x088e1: (154, "SignatureInfoMap"),
-  0x08901: (155, "TypeSwitchInfoMap"),
-  0x08921: (157, "CodeCacheMap"),
-  0x08941: (159, "TypeFeedbackInfoMap"),
-  0x08961: (160, "AliasedArgumentsEntryMap"),
-  0x08981: (161, "DebugInfoMap"),
-  0x089a1: (162, "BreakPointInfoMap"),
+  0x08081: (128, "MetaMap"),
+  0x080a5: (163, "FixedArrayMap"),
+  0x080c9: (130, "OddballMap"),
+  0x080ed: (163, "FixedCOWArrayMap"),
+  0x08111: (163, "ScopeInfoMap"),
+  0x08135: (132, "HeapNumberMap"),
+  0x08159: (133, "ForeignMap"),
+  0x0817d: (64, "SymbolMap"),
+  0x081a1: (68, "AsciiSymbolMap"),
+  0x081c5: (65, "ConsSymbolMap"),
+  0x081e9: (69, "ConsAsciiSymbolMap"),
+  0x0820d: (66, "ExternalSymbolMap"),
+  0x08231: (74, "ExternalSymbolWithAsciiDataMap"),
+  0x08255: (70, "ExternalAsciiSymbolMap"),
+  0x08279: (82, "ShortExternalSymbolMap"),
+  0x0829d: (90, "ShortExternalSymbolWithAsciiDataMap"),
+  0x082c1: (86, "ShortExternalAsciiSymbolMap"),
+  0x082e5: (0, "StringMap"),
+  0x08309: (4, "AsciiStringMap"),
+  0x0832d: (1, "ConsStringMap"),
+  0x08351: (5, "ConsAsciiStringMap"),
+  0x08375: (3, "SlicedStringMap"),
+  0x08399: (7, "SlicedAsciiStringMap"),
+  0x083bd: (2, "ExternalStringMap"),
+  0x083e1: (10, "ExternalStringWithAsciiDataMap"),
+  0x08405: (6, "ExternalAsciiStringMap"),
+  0x08429: (18, "ShortExternalStringMap"),
+  0x0844d: (26, "ShortExternalStringWithAsciiDataMap"),
+  0x08471: (22, "ShortExternalAsciiStringMap"),
+  0x08495: (0, "UndetectableStringMap"),
+  0x084b9: (4, "UndetectableAsciiStringMap"),
+  0x084dd: (145, "FixedDoubleArrayMap"),
+  0x08501: (134, "ByteArrayMap"),
+  0x08525: (135, "FreeSpaceMap"),
+  0x08549: (144, "ExternalPixelArrayMap"),
+  0x0856d: (136, "ExternalByteArrayMap"),
+  0x08591: (137, "ExternalUnsignedByteArrayMap"),
+  0x085b5: (138, "ExternalShortArrayMap"),
+  0x085d9: (139, "ExternalUnsignedShortArrayMap"),
+  0x085fd: (140, "ExternalIntArrayMap"),
+  0x08621: (141, "ExternalUnsignedIntArrayMap"),
+  0x08645: (142, "ExternalFloatArrayMap"),
+  0x08669: (163, "NonStrictArgumentsElementsMap"),
+  0x0868d: (143, "ExternalDoubleArrayMap"),
+  0x086b1: (129, "CodeMap"),
+  0x086d5: (131, "GlobalPropertyCellMap"),
+  0x086f9: (146, "OnePointerFillerMap"),
+  0x0871d: (146, "TwoPointerFillerMap"),
+  0x08741: (147, "AccessorInfoMap"),
+  0x08765: (148, "AccessorPairMap"),
+  0x08789: (149, "AccessCheckInfoMap"),
+  0x087ad: (150, "InterceptorInfoMap"),
+  0x087d1: (151, "CallHandlerInfoMap"),
+  0x087f5: (152, "FunctionTemplateInfoMap"),
+  0x08819: (153, "ObjectTemplateInfoMap"),
+  0x0883d: (154, "SignatureInfoMap"),
+  0x08861: (155, "TypeSwitchInfoMap"),
+  0x08885: (156, "ScriptMap"),
+  0x088a9: (157, "CodeCacheMap"),
+  0x088cd: (158, "PolymorphicCodeCacheMap"),
+  0x088f1: (159, "TypeFeedbackInfoMap"),
+  0x08915: (160, "AliasedArgumentsEntryMap"),
+  0x08939: (161, "DebugInfoMap"),
+  0x0895d: (162, "BreakPointInfoMap"),
+  0x08981: (163, "HashTableMap"),
+  0x089a5: (163, "FunctionContextMap"),
+  0x089c9: (163, "CatchContextMap"),
+  0x089ed: (163, "WithContextMap"),
+  0x08a11: (163, "BlockContextMap"),
+  0x08a35: (163, "ModuleContextMap"),
+  0x08a59: (163, "GlobalContextMap"),
+  0x08a7d: (163, "NativeContextMap"),
+  0x08aa1: (164, "SharedFunctionInfoMap"),
+  0x08ac5: (165, "JSMessageObjectMap"),
+  0x08ae9: (170, "ExternalMap"),
+  0x08b0d: (170, "NeanderMap"),
+  0x08b31: (170, ""),
 }
 
 
@@ -1639,6 +1750,11 @@ CONTEXT_FOR_ARCH = {
       ['eax', 'ebx', 'ecx', 'edx', 'edi', 'esi', 'ebp', 'esp', 'eip']
 }
 
+KNOWN_MODULES = {'chrome.exe', 'chrome.dll'}
+
+def GetModuleName(reader, module):
+  name = reader.ReadMinidumpString(module.module_name_rva)
+  return str(os.path.basename(str(name).replace("\\", "/")))
 
 def AnalyzeMinidump(options, minidump_name):
   reader = MinidumpReader(options, minidump_name)
@@ -1657,6 +1773,13 @@ def AnalyzeMinidump(options, minidump_name):
     # TODO(vitalyr): decode eflags.
     print "    eflags: %s" % bin(reader.exception_context.eflags)[2:]
     print
+    print "  modules:"
+    for module in reader.module_list.modules:
+      name = GetModuleName(reader, module)
+      if name in KNOWN_MODULES:
+        print "    %s at %08X" % (name, module.base_of_image)
+        reader.TryLoadSymbolsFor(name, module)
+    print
 
     stack_top = reader.ExceptionSP()
     stack_bottom = exception_thread.stack.start + \
@@ -1669,6 +1792,9 @@ def AnalyzeMinidump(options, minidump_name):
     heap = V8Heap(reader, stack_map)
 
     print "Disassembly around exception.eip:"
+    eip_symbol = reader.FindSymbol(reader.ExceptionIP())
+    if eip_symbol is not None:
+      print eip_symbol
     disasm_start = reader.ExceptionIP() - EIP_PROXIMITY
     disasm_bytes = 2 * EIP_PROXIMITY
     if (options.full):
@@ -1697,8 +1823,10 @@ def AnalyzeMinidump(options, minidump_name):
       for slot in xrange(stack_top, stack_bottom, reader.PointerSize()):
         maybe_address = reader.ReadUIntPtr(slot)
         heap_object = heap.FindObject(maybe_address)
-        print "%s: %s" % (reader.FormatIntPtr(slot),
-                          reader.FormatIntPtr(maybe_address))
+        maybe_symbol = reader.FindSymbol(maybe_address)
+        print "%s: %s %s" % (reader.FormatIntPtr(slot),
+                             reader.FormatIntPtr(maybe_address),
+                             maybe_symbol or "")
         if heap_object:
           heap_object.Print(Printer())
           print
@@ -1712,6 +1840,8 @@ if __name__ == "__main__":
                     help="start an interactive inspector shell")
   parser.add_option("-f", "--full", dest="full", action="store_true",
                     help="dump all information contained in the minidump")
+  parser.add_option("--symdir", dest="symdir", default=".",
+                    help="directory containing *.pdb.sym file with symbols")
   options, args = parser.parse_args()
   if len(args) != 1:
     parser.print_help()
diff --git a/deps/v8/tools/gyp/v8.gyp b/deps/v8/tools/gyp/v8.gyp
index 5d3cad526f..aad07c7094 100644
--- a/deps/v8/tools/gyp/v8.gyp
+++ b/deps/v8/tools/gyp/v8.gyp
@@ -69,6 +69,14 @@
                 ],
               },
               'conditions': [
+                ['OS=="android"', {
+                  'libraries': [
+                    '-llog',
+                  ],
+                  'include_dirs': [
+                    'src/common/android/include',
+                  ],
+                }],
                 ['OS=="mac"', {
                   'xcode_settings': {
                     'OTHER_LDFLAGS': ['-dynamiclib', '-all_load']
@@ -353,6 +361,7 @@
             '../../src/isolate.cc',
             '../../src/isolate.h',
             '../../src/json-parser.h',
+            '../../src/json-stringifier.h',
             '../../src/jsregexp.cc',
             '../../src/jsregexp.h',
             '../../src/lazy-instance.h',
@@ -678,14 +687,6 @@
                   'libraries': [
                     '-L/usr/local/lib -lexecinfo',
                 ]},
-            }],
-            ['OS=="dragonflybsd"', {
-                'link_settings': {
-                  'libraries': [
-                    '-pthread',
-                ]},
-            }],
-            ['OS=="freebsd" or OS=="dragonflybsd"', {
                 'sources': [
                   '../../src/platform-freebsd.cc',
                   '../../src/platform-posix.cc'
@@ -738,9 +739,6 @@
                 '../../src/win32-math.h',
               ],
               'msvs_disabled_warnings': [4351, 4355, 4800],
-              'direct_dependent_settings': {
-                'msvs_disabled_warnings': [4351, 4355, 4800],
-              },
               'link_settings':  {
                 'libraries': [ '-lwinmm.lib', '-lws2_32.lib' ],
               },
@@ -754,8 +752,7 @@
             ['v8_postmortem_support=="true"', {
               'sources': [
                 '<(SHARED_INTERMEDIATE_DIR)/debug-support.cc',
-              ],
-              'dependencies': ['postmortem-metadata']
+              ]
             }],
           ],
         },
@@ -791,6 +788,7 @@
               '../../src/macros.py',
               '../../src/proxy.js',
               '../../src/collection.js',
+              '../../src/object-observe.js'
             ],
           },
           'actions': [
@@ -804,7 +802,7 @@
                 '<(SHARED_INTERMEDIATE_DIR)/libraries.cc',
               ],
               'action': [
-                '<(python)',
+                'python',
                 '../../tools/js2c.py',
                 '<@(_outputs)',
                 'CORE',
@@ -822,7 +820,7 @@
                 '<(SHARED_INTERMEDIATE_DIR)/experimental-libraries.cc',
               ],
               'action': [
-                '<(python)',
+                'python',
                 '../../tools/js2c.py',
                 '<@(_outputs)',
                 'EXPERIMENTAL',
@@ -852,7 +850,7 @@
                   '<(SHARED_INTERMEDIATE_DIR)/debug-support.cc',
                 ],
                 'action': [
-                  '<(python)',
+                  'python',
                   '../../tools/gen-postmortem-metadata.py',
                   '<@(_outputs)',
                   '<@(heapobject_files)'
diff --git a/deps/v8/tools/ll_prof.py b/deps/v8/tools/ll_prof.py
index 3afe179d2f..216929d1e2 100755
--- a/deps/v8/tools/ll_prof.py
+++ b/deps/v8/tools/ll_prof.py
@@ -45,7 +45,7 @@ USAGE="""usage: %prog [OPTION]...
 Analyses V8 and perf logs to produce profiles.
 
 Perf logs can be collected using a command like:
-  $ perf record -R -e cycles -c 10000 -f -i ./shell bench.js --ll-prof
+  $ perf record -R -e cycles -c 10000 -f -i ./d8 bench.js --ll-prof
   # -R: collect all data
   # -e cycles: use cpu-cycles event (run "perf list" for details)
   # -c 10000: write a sample after each 10000 events
@@ -54,6 +54,16 @@ Perf logs can be collected using a command like:
   # --ll-prof shell flag enables the right V8 logs
 This will produce a binary trace file (perf.data) that %prog can analyse.
 
+IMPORTANT:
+  The kernel has an internal maximum for events per second, it is 100K by
+  default. That's not enough for "-c 10000". Set it to some higher value:
+  $ echo 10000000 | sudo tee /proc/sys/kernel/perf_event_max_sample_rate
+  You can also make the warning about kernel address maps go away:
+  $ echo 0 | sudo tee /proc/sys/kernel/kptr_restrict
+
+We have a convenience script that handles all of the above for you:
+  $ tools/run-llprof.sh ./d8 bench.js
+
 Examples:
   # Print flat profile with annotated disassembly for the 10 top
   # symbols. Use default log names and include the snapshot log.
@@ -75,6 +85,10 @@ class Code(object):
   """Code object."""
 
   _id = 0
+  UNKNOWN = 0
+  V8INTERNAL = 1
+  FULL_CODEGEN = 2
+  OPTIMIZED = 3
 
   def __init__(self, name, start_address, end_address, origin, origin_offset):
     self.id = Code._id
@@ -88,6 +102,14 @@ class Code(object):
     self.self_ticks = 0
     self.self_ticks_map = None
     self.callee_ticks = None
+    if name.startswith("LazyCompile:*"):
+      self.codetype = Code.OPTIMIZED
+    elif name.startswith("LazyCompile:"):
+      self.codetype = Code.FULL_CODEGEN
+    elif name.startswith("v8::internal::"):
+      self.codetype = Code.V8INTERNAL
+    else:
+      self.codetype = Code.UNKNOWN
 
   def AddName(self, name):
     assert self.name != name
@@ -185,7 +207,7 @@ class Code(object):
 class CodePage(object):
   """Group of adjacent code objects."""
 
-  SHIFT = 12  # 4K pages
+  SHIFT = 20  # 1M pages
   SIZE = (1 << SHIFT)
   MASK = ~(SIZE - 1)
 
@@ -507,6 +529,7 @@ class Descriptor(object):
 # for the gory details.
 
 
+# Reference: struct perf_file_header in kernel/tools/perf/util/header.h
 TRACE_HEADER_DESC = Descriptor([
   ("magic", "u64"),
   ("size", "u64"),
@@ -520,6 +543,7 @@ TRACE_HEADER_DESC = Descriptor([
 ])
 
 
+# Reference: /usr/include/linux/perf_event.h
 PERF_EVENT_ATTR_DESC = Descriptor([
   ("type", "u32"),
   ("size", "u32"),
@@ -529,12 +553,13 @@ PERF_EVENT_ATTR_DESC = Descriptor([
   ("read_format", "u64"),
   ("flags", "u64"),
   ("wakeup_events_or_watermark", "u32"),
-  ("bt_type", "u32"),
+  ("bp_type", "u32"),
   ("bp_addr", "u64"),
-  ("bp_len", "u64"),
+  ("bp_len", "u64")
 ])
 
 
+# Reference: /usr/include/linux/perf_event.h
 PERF_EVENT_HEADER_DESC = Descriptor([
   ("type", "u32"),
   ("misc", "u16"),
@@ -542,6 +567,7 @@ PERF_EVENT_HEADER_DESC = Descriptor([
 ])
 
 
+# Reference: kernel/events/core.c
 PERF_MMAP_EVENT_BODY_DESC = Descriptor([
   ("pid", "u32"),
   ("tid", "u32"),
@@ -566,6 +592,7 @@ PERF_SAMPLE_STREAM_ID = 1 << 9
 PERF_SAMPLE_RAW = 1 << 10
 
 
+# Reference: /usr/include/perf_event.h, the comment for PERF_RECORD_SAMPLE.
 PERF_SAMPLE_EVENT_BODY_FIELDS = [
   ("ip", "u64", PERF_SAMPLE_IP),
   ("pid", "u32", PERF_SAMPLE_TID),
@@ -702,8 +729,12 @@ class LibraryRepo(object):
     # Unfortunately, section headers span two lines, so we have to
     # keep the just seen section name (from the first line in each
     # section header) in the after_section variable.
+    if mmap_info.filename.endswith(".ko"):
+      dynamic_symbols = ""
+    else:
+      dynamic_symbols = "-T"
     process = subprocess.Popen(
-      "%s -h -t -T -C %s" % (OBJDUMP_BIN, mmap_info.filename),
+      "%s -h -t %s -C %s" % (OBJDUMP_BIN, dynamic_symbols, mmap_info.filename),
       shell=True, stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
     pipe = process.stdout
     after_section = None
@@ -795,7 +826,7 @@ def PrintReport(code_map, library_repo, arch, ticks, options):
       code.PrintAnnotated(arch, options)
   print
   print "Ticks per library:"
-  mmap_infos = [m for m in library_repo.infos]
+  mmap_infos = [m for m in library_repo.infos if m.ticks > 0]
   mmap_infos.sort(key=lambda m: m.ticks, reverse=True)
   for mmap_info in mmap_infos:
     mmap_ticks = mmap_info.ticks
@@ -885,6 +916,9 @@ if __name__ == "__main__":
   ticks = 0
   missed_ticks = 0
   really_missed_ticks = 0
+  optimized_ticks = 0
+  generated_ticks = 0
+  v8_internal_ticks = 0
   mmap_time = 0
   sample_time = 0
 
@@ -928,6 +962,12 @@ if __name__ == "__main__":
       code = code_map.Find(sample.ip)
       if code:
         code.Tick(sample.ip)
+        if code.codetype == Code.OPTIMIZED:
+          optimized_ticks += 1
+        elif code.codetype == Code.FULL_CODEGEN:
+          generated_ticks += 1
+        elif code.codetype == Code.V8INTERNAL:
+          v8_internal_ticks += 1
       else:
         missed_ticks += 1
       if not library_repo.Tick(sample.ip) and not code:
@@ -947,12 +987,21 @@ if __name__ == "__main__":
     PrintReport(code_map, library_repo, log_reader.arch, ticks, options)
 
     if not options.quiet:
+      def PrintTicks(number, total, description):
+        print("%10d %5.1f%% ticks in %s" %
+              (number, 100.0*number/total, description))
       print
       print "Stats:"
       print "%10d total trace events" % events
       print "%10d total ticks" % ticks
       print "%10d ticks not in symbols" % missed_ticks
-      print "%10d unaccounted ticks" % really_missed_ticks
+      unaccounted = "unaccounted ticks"
+      if really_missed_ticks > 0:
+        unaccounted += " (probably in the kernel, try --kernel)"
+      PrintTicks(really_missed_ticks, ticks, unaccounted)
+      PrintTicks(optimized_ticks, ticks, "ticks in optimized code")
+      PrintTicks(generated_ticks, ticks, "ticks in other lazily compiled code")
+      PrintTicks(v8_internal_ticks, ticks, "ticks in v8::internal::*")
       print "%10d total symbols" % len([c for c in code_map.AllCode()])
       print "%10d used symbols" % len([c for c in code_map.UsedCode()])
       print "%9.2fs library processing time" % mmap_time
diff --git a/deps/v8/tools/merge-to-branch.sh b/deps/v8/tools/merge-to-branch.sh
index aa590a313c..e0011edff0 100644..100755
--- a/deps/v8/tools/merge-to-branch.sh
+++ b/deps/v8/tools/merge-to-branch.sh
@@ -186,7 +186,6 @@ if [ $START_STEP -le $CURRENT_STEP ] ; then
   if [ -n "$EXTRA_PATCH" ] ; then
     apply_patch "$EXTRA_PATCH"
   fi
-  stage_files
 fi
 
 let CURRENT_STEP+=1
@@ -205,8 +204,9 @@ if [ $START_STEP -le $CURRENT_STEP ] ; then
 your EDITOR on $VERSION_FILE so you can make arbitrary changes. When \
 you're done, save the file and exit your EDITOR.)"
   if [ $? -eq 0 ] ; then
+    echo $NEWPATCH $VERSION_FILE
     sed -e "/#define PATCH_LEVEL/s/[0-9]*$/$NEWPATCH/" \
-        -i "$VERSION_FILE"
+        -i.bak "$VERSION_FILE" || die "Could not increment patch level"
   else
     $EDITOR "$VERSION_FILE"
   fi
diff --git a/deps/v8/tools/plot-timer-events b/deps/v8/tools/plot-timer-events
new file mode 100755
index 0000000000..581e0ae333
--- /dev/null
+++ b/deps/v8/tools/plot-timer-events
@@ -0,0 +1,71 @@
+#!/bin/sh
+
+# find the name of the log file to process, it must not start with a dash.
+log_file="v8.log"
+for arg in "$@"
+do
+  if ! expr "X${arg}" : "^X-" > /dev/null; then
+    log_file=${arg}
+  fi
+done
+
+tools_path=`cd $(dirname "$0");pwd`
+if [ ! "$D8_PATH" ]; then
+  d8_public=`which d8`
+  if [ -x "$d8_public" ]; then D8_PATH=$(dirname "$d8_public"); fi
+fi
+[ -n "$D8_PATH" ] || D8_PATH=$tools_path/..
+d8_exec=$D8_PATH/d8
+
+if [ ! -x "$d8_exec" ]; then
+  D8_PATH=`pwd`/out/native
+  d8_exec=$D8_PATH/d8
+fi
+
+if [ ! -x "$d8_exec" ]; then
+  d8_exec=`grep -m 1 -o '".*/d8"' $log_file | sed 's/"//g'`
+fi
+
+if [ ! -x "$d8_exec" ]; then
+  echo "d8 shell not found in $D8_PATH"
+  echo "To build, execute 'make native' from the V8 directory"
+  exit 1
+fi
+
+if [ -n "$DISTORTION" ]; then
+  distortion=$DISTORTION
+else
+  # Try to find out how much the instrumentation overhead is.
+  calibration_log=calibration.log
+  calibration_script="for (var i = 0; i < 1000000; i++) print();"
+
+  $d8_exec --nocrankshaft --prof --logfile $calibration_log \
+       --log-timer-events -e "$calibration_script" > /dev/null
+  t_1=`grep "V8.Execute" $calibration_log  | tail -n1 | awk -F, '{print $4}'`
+  n_1=`grep "timer-event" $calibration_log  | wc -l`
+
+  $d8_exec --nocrankshaft --prof --logfile $calibration_log \
+       --log-internal-timer-events -e "$calibration_script" > /dev/null
+  t_2=`grep "V8.Execute" $calibration_log  | tail -n1 | awk -F, '{print $4}'`
+  n_2=`grep "timer-event" $calibration_log  | wc -l`
+
+  rm $calibration_log
+
+  # Overhead in picoseconds.
+  distortion=`echo "1000*($t_1 - $t_2)/($n_1 - $n_2)" | bc`
+fi
+
+if [ -n "$PLOT_RANGE" ]; then
+  plot_range=$PLOT_RANGE
+else
+  plot_range=auto,auto
+fi
+
+echo "DISTORTION=$distortion"
+echo "PLOT_RANGE=$plot_range"
+
+echo -e "plot-range,$plot_range\ndistortion,$distortion" | cat - $log_file |
+    $d8_exec $tools_path/csvparser.js \
+    $tools_path/splaytree.js $tools_path/codemap.js \
+    $tools_path/logreader.js $tools_path/plot-timer-events.js \
+    2>/dev/null | gnuplot > timer-events.png
diff --git a/deps/v8/tools/plot-timer-events.js b/deps/v8/tools/plot-timer-events.js
new file mode 100644
index 0000000000..4b17e76740
--- /dev/null
+++ b/deps/v8/tools/plot-timer-events.js
@@ -0,0 +1,576 @@
+// Copyright 2012 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+var kV8BinarySuffixes = ["/d8", "/libv8.so"];
+var kStackFrames = 8;
+
+var kTimerEventWidth = 0.33;
+var kExecutionFrameWidth = 0.2;
+var kStackFrameWidth = 0.1;
+var kGapWidth = 0.05;
+
+var kPauseTolerance = 0.1;  // Milliseconds.
+var kY1Offset = 10;
+
+var kResX = 1600;
+var kResY = 600;
+var kPauseLabelPadding = 5;
+var kNumPauseLabels = 7;
+var kTickHalfDuration = 0.5;  // Milliseconds
+var kCodeKindLabelPadding = 100;
+
+var num_timer_event = kY1Offset + 0.5;
+
+
+function TimerEvent(color, pause, no_execution) {
+  this.color = color;
+  this.pause = pause;
+  this.ranges = [];
+  this.no_execution = no_execution;
+  this.index = ++num_timer_event;
+}
+
+
+var TimerEvents = {
+  'V8.Execute':              new TimerEvent("#000000", false, false),
+  'V8.External':             new TimerEvent("#3399FF", false,  true),
+  'V8.CompileFullCode':      new TimerEvent("#CC0000",  true,  true),
+  'V8.RecompileSynchronous': new TimerEvent("#CC0044",  true,  true),
+  'V8.RecompileParallel':    new TimerEvent("#CC4499", false, false),
+  'V8.CompileEval':          new TimerEvent("#CC4400",  true,  true),
+  'V8.Parse':                new TimerEvent("#00CC00",  true,  true),
+  'V8.PreParse':             new TimerEvent("#44CC00",  true,  true),
+  'V8.ParseLazy':            new TimerEvent("#00CC44",  true,  true),
+  'V8.GCScavenger':          new TimerEvent("#0044CC",  true,  true),
+  'V8.GCCompactor':          new TimerEvent("#4444CC",  true,  true),
+  'V8.GCContext':            new TimerEvent("#4400CC",  true,  true),
+}
+
+var kExecutionEvent = TimerEvents['V8.Execute'];
+
+
+function CodeKind(color, kinds) {
+  this.color = color;
+  this.in_execution = [];
+  this.stack_frames = [];
+  for (var i = 0; i < kStackFrames; i++) this.stack_frames.push([]);
+  this.kinds = kinds;
+}
+
+
+var CodeKinds = {
+  'external ': new CodeKind("#3399FF", [-3]),
+  'reg.exp. ': new CodeKind("#0000FF", [-2]),
+  'runtime  ': new CodeKind("#000000", [-1]),
+  'full code': new CodeKind("#DD0000", [0]),
+  'opt code ': new CodeKind("#00EE00", [1]),
+  'code stub': new CodeKind("#FF00FF", [2]),
+  'built-in ': new CodeKind("#AA00AA", [3]),
+  'inl.cache': new CodeKind("#4444AA", [4, 5, 6, 7, 8, 9, 10, 11, 12, 13]),
+}
+
+
+var xrange_start = Infinity;
+var xrange_end = 0;
+var obj_index = 0;
+var execution_pauses = [];
+var code_map = new CodeMap();
+
+var xrange_start_override = undefined;
+var xrange_end_override = undefined;
+var distortion_per_entry = 0.005;  // Milliseconds
+
+var sort_by_start = [];
+var sort_by_end = [];
+var sorted_ticks = [];
+
+
+function Range(start, end) {
+  // Everthing from here are in milliseconds.
+  this.start = start;
+  this.end = end;
+}
+
+
+function Tick(tick) {
+  this.tick = tick;
+}
+
+
+Range.prototype.duration = function() { return this.end - this.start; }
+
+
+function ProcessTimerEvent(name, start, length) {
+  var event = TimerEvents[name];
+  if (event === undefined) return;
+  start /= 1000;  // Convert to milliseconds.
+  length /= 1000;
+  var end = start + length;
+  var range = new Range(start, end);
+  event.ranges.push(range);
+  sort_by_start.push(range);
+  sort_by_end.push(range);
+}
+
+
+function ProcessCodeCreateEvent(type, kind, address, size, name) {
+  var code_entry = new CodeMap.CodeEntry(size, name);
+  code_entry.kind = kind;
+  code_map.addCode(address, code_entry);
+}
+
+
+function ProcessCodeMoveEvent(from, to) {
+  code_map.moveCode(from, to);
+}
+
+
+function ProcessCodeDeleteEvent(address) {
+  code_map.deleteCode(address);
+}
+
+
+function ProcessSharedLibrary(name, start, end) {
+  var code_entry = new CodeMap.CodeEntry(end - start, name);
+  code_entry.kind = -3;  // External code kind.
+  for (var i = 0; i < kV8BinarySuffixes.length; i++) {
+    var suffix = kV8BinarySuffixes[i];
+    if (name.indexOf(suffix, name.length - suffix.length) >= 0) {
+      code_entry.kind = -1;  // V8 runtime code kind.
+      break;
+    }
+  }
+  code_map.addLibrary(start, code_entry);
+}
+
+
+function FindCodeKind(kind) {
+  for (name in CodeKinds) {
+    if (CodeKinds[name].kinds.indexOf(kind) >= 0) {
+      return CodeKinds[name];
+    }
+  }
+}
+
+
+function ProcessTickEvent(pc, sp, timer, unused_x, unused_y, vmstate, stack) {
+  timer /= 1000;
+  var tick = new Tick(timer);
+
+  var entered = false;
+  var entry = code_map.findEntry(pc);
+  if (entry) {
+    FindCodeKind(entry.kind).in_execution.push(tick);
+    entered = true;
+  }
+
+  for (var i = 0; i < kStackFrames; i++) {
+    if (!stack[i]) break;
+    var entry = code_map.findEntry(stack[i]);
+    if (entry) {
+      FindCodeKind(entry.kind).stack_frames[i].push(tick);
+      entered = true;
+    }
+  }
+
+  if (entered) sorted_ticks.push(tick);
+}
+
+
+function ProcessDistortion(distortion_in_picoseconds) {
+  distortion_per_entry = distortion_in_picoseconds / 1000000;
+}
+
+
+function ProcessPlotRange(start, end) {
+  xrange_start_override = start;
+  xrange_end_override = end;
+}
+
+
+function Undistort() {
+  // Undistort timers wrt instrumentation overhead.
+  sort_by_start.sort(function(a, b) { return b.start - a.start; });
+  sort_by_end.sort(function(a, b) { return b.end - a.end; });
+  sorted_ticks.sort(function(a, b) { return b.tick - a.tick; });
+  var distortion = 0;
+
+  var next_start = sort_by_start.pop();
+  var next_end = sort_by_end.pop();
+  var next_tick = sorted_ticks.pop();
+
+  function UndistortTicksUntil(tick) {
+    while (next_tick) {
+      if (next_tick.tick > tick) return;
+      next_tick.tick -= distortion;
+      next_tick = sorted_ticks.pop();
+    }
+  }
+
+  while (true) {
+    var next_start_start = next_start ? next_start.start : Infinity;
+    var next_end_end = next_end ? next_end.end : Infinity;
+    if (!next_start && !next_end) {
+      UndistortTicksUntil(Infinity);
+      break;
+    }
+    if (next_start_start <= next_end_end) {
+      UndistortTicksUntil(next_start_start);
+      // Undistort the start time stamp.
+      next_start.start -= distortion;
+      next_start = sort_by_start.pop();
+    } else {
+      // Undistort the end time stamp.  We completely attribute the overhead
+      // to the point when we stop and log the timer, so we increase the
+      // distortion only here.
+      UndistortTicksUntil(next_end_end);
+      next_end.end -= distortion;
+      distortion += distortion_per_entry;
+      next_end = sort_by_end.pop();
+    }
+  }
+
+  sort_by_start = undefined;
+  sort_by_end = undefined;
+  sorted_ticks = undefined;
+
+  // Make sure that start <= end applies for every range.
+  for (name in TimerEvents) {
+    var ranges = TimerEvents[name].ranges;
+    for (var j = 0; j < ranges.length; j++) {
+      if (ranges[j].end < ranges[j].start) ranges[j].end = ranges[j].start;
+    }
+  }
+}
+
+
+function CollectData() {
+  // Collect data from log.
+  var logreader = new LogReader(
+    { 'timer-event' :   { parsers: [null, parseInt, parseInt],
+                          processor: ProcessTimerEvent },
+      'shared-library': { parsers: [null, parseInt, parseInt],
+                          processor: ProcessSharedLibrary },
+      'code-creation':  { parsers: [null, parseInt, parseInt, parseInt, null],
+                          processor: ProcessCodeCreateEvent },
+      'code-move':      { parsers: [parseInt, parseInt],
+                          processor: ProcessCodeMoveEvent },
+      'code-delete':    { parsers: [parseInt],
+                          processor: ProcessCodeDeleteEvent },
+      'tick':           { parsers: [parseInt, parseInt, parseInt,
+                                    null, null, parseInt, 'var-args'],
+                          processor: ProcessTickEvent },
+      'distortion':     { parsers: [parseInt],
+                          processor: ProcessDistortion },
+      'plot-range':     { parsers: [parseInt, parseInt],
+                          processor: ProcessPlotRange },
+    });
+
+  var line;
+  while (line = readline()) {
+    logreader.processLogLine(line);
+  }
+
+  Undistort();
+
+  // Figure out plot range.
+  var execution_ranges = kExecutionEvent.ranges;
+  for (var i = 0; i < execution_ranges.length; i++) {
+    if (execution_ranges[i].start < xrange_start) {
+      xrange_start = execution_ranges[i].start;
+    }
+    if (execution_ranges[i].end > xrange_end) {
+      xrange_end = execution_ranges[i].end;
+    }
+  }
+
+  // Collect execution pauses.
+  for (name in TimerEvents) {
+    var event = TimerEvents[name];
+    if (!event.pause) continue;
+    var ranges = event.ranges;
+    for (var j = 0; j < ranges.length; j++) execution_pauses.push(ranges[j]);
+  }
+  execution_pauses = MergeRanges(execution_pauses);
+
+  // Knock out time not spent in javascript execution.  Note that this also
+  // includes time spent external code, which do not contribute to execution
+  // pauses.
+  var exclude_ranges = [];
+  for (name in TimerEvents) {
+    var event = TimerEvents[name];
+    if (!event.no_execution) continue;
+    var ranges = event.ranges;
+    // Add ranges of this event to the pause list.
+    for (var j = 0; j < ranges.length; j++) {
+      exclude_ranges.push(ranges[j]);
+    }
+  }
+
+  kExecutionEvent.ranges = MergeRanges(kExecutionEvent.ranges);
+  exclude_ranges = MergeRanges(exclude_ranges);
+  kExecutionEvent.ranges = ExcludeRanges(kExecutionEvent.ranges,
+                                         exclude_ranges);
+}
+
+
+function DrawBar(row, color, start, end, width) {
+  obj_index++;
+  command = "set object " + obj_index + " rect";
+  command += " from " + start + ", " + (row - width);
+  command += " to " + end + ", " + (row + width);
+  command += " fc rgb \"" + color + "\"";
+  print(command);
+}
+
+
+function TicksToRanges(ticks) {
+  var ranges = [];
+  for (var i = 0; i < ticks.length; i++) {
+    var tick = ticks[i].tick;
+    ranges.push(new Range(tick - kTickHalfDuration, tick + kTickHalfDuration));
+  }
+  return ranges;
+}
+
+
+function MergeRanges(ranges) {
+  ranges.sort(function(a, b) { return a.start - b.start; });
+  var result = [];
+  var j = 0;
+  for (var i = 0; i < ranges.length; i = j) {
+    var merge_start = ranges[i].start;
+    if (merge_start > xrange_end) break;  // Out of plot range.
+    var merge_end = ranges[i].end;
+    for (j = i + 1; j < ranges.length; j++) {
+      var next_range = ranges[j];
+      // Don't merge ranges if there is no overlap (including merge tolerance).
+      if (next_range.start > merge_end + kPauseTolerance) break;
+      // Merge ranges.
+      if (next_range.end > merge_end) {  // Extend range end.
+        merge_end = next_range.end;
+      }
+    }
+    if (merge_end < xrange_start) continue;  // Out of plot range.
+    if (merge_end < merge_start) continue;  // Not an actual range.
+    result.push(new Range(merge_start, merge_end));
+  }
+  return result;
+}
+
+
+function ExcludeRanges(include, exclude) {
+  // We assume that both input lists are sorted and merged with MergeRanges.
+  var result = [];
+  var exclude_index = 0;
+  var include_index = 0;
+  var include_start, include_end, exclude_start, exclude_end;
+
+  function NextInclude() {
+    if (include_index >= include.length) return false;
+    include_start = include[include_index].start;
+    include_end = include[include_index].end;
+    include_index++;
+    return true;
+  }
+
+  function NextExclude() {
+    if (exclude_index >= exclude.length) {
+      // No more exclude, finish by repeating case (2).
+      exclude_start = Infinity;
+      exclude_end = Infinity;
+      return false;
+    }
+    exclude_start = exclude[exclude_index].start;
+    exclude_end = exclude[exclude_index].end;
+    exclude_index++;
+    return true;
+  }
+
+  if (!NextInclude() || !NextExclude()) return include;
+
+  while (true) {
+    if (exclude_end <= include_start) {
+      // (1) Exclude and include do not overlap.
+      // Include       #####
+      // Exclude   ##
+      NextExclude();
+    } else if (include_end <= exclude_start) {
+      // (2) Exclude and include do not overlap.
+      // Include   #####
+      // Exclude         ###
+      result.push(new Range(include_start, include_end));
+      if (!NextInclude()) break;
+    } else if (exclude_start <= include_start &&
+               exclude_end < include_end &&
+               include_start < exclude_end) {
+      // (3) Exclude overlaps with begin of include.
+      // Include    #######
+      // Exclude  #####
+      // Result        ####
+      include_start = exclude_end;
+      NextExclude();
+    } else if (include_start < exclude_start &&
+               include_end <= exclude_end &&
+               exclude_start < include_end) {
+      // (4) Exclude overlaps with end of include.
+      // Include    #######
+      // Exclude        #####
+      // Result     ####
+      result.push(new Range(include_start, exclude_start));
+      if (!NextInclude()) break;
+    } else if (exclude_start > include_start && exclude_end < include_end) {
+      // (5) Exclude splits include into two parts.
+      // Include    #######
+      // Exclude      ##
+      // Result     ##  ###
+      result.push(new Range(include_start, exclude_start));
+      include_start = exclude_end;
+      NextExclude();
+    } else if (exclude_start <= include_start && exclude_end >= include_end) {
+      // (6) Exclude entirely covers include.
+      // Include    ######
+      // Exclude   #########
+      if (!NextInclude()) break;
+    } else {
+      throw new Error("this should not happen!");
+    }
+  }
+
+  return result;
+}
+
+
+function GnuplotOutput() {
+  xrange_start = (xrange_start_override || xrange_start_override == 0)
+                     ? xrange_start_override : xrange_start;
+  xrange_end = (xrange_end_override || xrange_end_override == 0)
+                   ? xrange_end_override : xrange_end;
+  print("set terminal pngcairo size " + kResX + "," + kResY +
+        " enhanced font 'Helvetica,10'");
+  print("set yrange [0:" + (num_timer_event + 1) + "]");
+  print("set xlabel \"execution time in ms\"");
+  print("set xrange [" + xrange_start + ":" + xrange_end + "]");
+  print("set style fill pattern 2 bo 1");
+  print("set style rect fs solid 1 noborder");
+  print("set style line 1 lt 1 lw 1 lc rgb \"#000000\"");
+  print("set xtics out nomirror");
+  print("unset key");
+
+  // Name Y-axis.
+  var ytics = [];
+  for (name in TimerEvents) {
+    var index = TimerEvents[name].index;
+    ytics.push('"' + name + '"' + ' ' + index);
+  }
+  ytics.push('"code kind being executed"' + ' ' + (kY1Offset - 1));
+  ytics.push('"top ' + kStackFrames + ' js stack frames"' + ' ' +
+             (kY1Offset - 2));
+  ytics.push('"pause times" 0');
+  print("set ytics out nomirror (" + ytics.join(', ') + ")");
+
+  // Plot timeline.
+  for (var name in TimerEvents) {
+    var event = TimerEvents[name];
+    var ranges = MergeRanges(event.ranges);
+    for (var i = 0; i < ranges.length; i++) {
+      DrawBar(event.index, event.color,
+              ranges[i].start, ranges[i].end,
+              kTimerEventWidth);
+    }
+  }
+
+  // Plot code kind gathered from ticks.
+  for (var name in CodeKinds) {
+    var code_kind = CodeKinds[name];
+    var offset = kY1Offset - 1;
+    // Top most frame.
+    var row = MergeRanges(TicksToRanges(code_kind.in_execution));
+    for (var j = 0; j < row.length; j++) {
+      DrawBar(offset, code_kind.color,
+              row[j].start, row[j].end, kExecutionFrameWidth);
+    }
+    offset = offset - 2 * kExecutionFrameWidth - kGapWidth;
+    // Javascript frames.
+    for (var i = 0; i < kStackFrames; i++) {
+      offset = offset - 2 * kStackFrameWidth - kGapWidth;
+      row = MergeRanges(TicksToRanges(code_kind.stack_frames[i]));
+      for (var j = 0; j < row.length; j++) {
+        DrawBar(offset, code_kind.color,
+                row[j].start, row[j].end, kStackFrameWidth);
+      }
+    }
+  }
+
+  // Add labels as legend for code kind colors.
+  var padding = kCodeKindLabelPadding * (xrange_end - xrange_start) / kResX;
+  var label_x = xrange_start;
+  var label_y = kY1Offset;
+  for (var name in CodeKinds) {
+    label_x += padding;
+    print("set label \"" + name + "\" at " + label_x + "," + label_y +
+          " textcolor rgb \"" + CodeKinds[name].color + "\"" +
+          " font \"Helvetica,9'\"");
+  }
+
+  if (execution_pauses.length == 0) {
+    // Force plot and return without plotting execution pause impulses.
+    print("plot 1/0");
+    return;
+  }
+
+  // Label the longest pauses.
+  execution_pauses.sort(
+      function(a, b) { return b.duration() - a.duration(); });
+
+  var max_pause_time = execution_pauses[0].duration();
+  padding = kPauseLabelPadding * (xrange_end - xrange_start) / kResX;
+  var y_scale = kY1Offset / max_pause_time / 2;
+  for (var i = 0; i < execution_pauses.length && i < kNumPauseLabels; i++) {
+    var pause = execution_pauses[i];
+    var label_content = (pause.duration() | 0) + " ms";
+    var label_x = pause.end + padding;
+    var label_y = Math.max(1, (pause.duration() * y_scale));
+    print("set label \"" + label_content + "\" at " +
+          label_x + "," + label_y + " font \"Helvetica,7'\"");
+  }
+
+  // Scale second Y-axis appropriately.
+  var y2range = max_pause_time * num_timer_event / kY1Offset * 2;
+  print("set y2range [0:" + y2range + "]");
+  // Plot graph with impulses as data set.
+  print("plot '-' using 1:2 axes x1y2 with impulses ls 1");
+  for (var i = 0; i < execution_pauses.length; i++) {
+    var pause = execution_pauses[i];
+    print(pause.end + " " + pause.duration());
+  }
+  print("e");
+}
+
+
+CollectData();
+GnuplotOutput();
diff --git a/deps/v8/tools/presubmit.py b/deps/v8/tools/presubmit.py
index a0b81e85f4..efa8724e76 100755
--- a/deps/v8/tools/presubmit.py
+++ b/deps/v8/tools/presubmit.py
@@ -307,6 +307,7 @@ class SourceProcessor(SourceFileProcessor):
               or (name == 'DerivedSources'))
 
   IGNORE_COPYRIGHTS = ['cpplint.py',
+                       'daemon.py',
                        'earley-boyer.js',
                        'raytrace.js',
                        'crypto.js',
diff --git a/deps/v8/tools/push-to-trunk.sh b/deps/v8/tools/push-to-trunk.sh
index a193d57384..8512d12877 100755
--- a/deps/v8/tools/push-to-trunk.sh
+++ b/deps/v8/tools/push-to-trunk.sh
@@ -268,7 +268,6 @@ if [ $START_STEP -le $CURRENT_STEP ] ; then
   echo ">>> Step $CURRENT_STEP: Apply squashed changes."
   rm -f "$TOUCHED_FILES_FILE"
   apply_patch "$PATCH_FILE"
-  stage_files
   rm -f "$PATCH_FILE"
 fi
 
diff --git a/deps/v8/tools/run-llprof.sh b/deps/v8/tools/run-llprof.sh
new file mode 100755
index 0000000000..d526170d1f
--- /dev/null
+++ b/deps/v8/tools/run-llprof.sh
@@ -0,0 +1,69 @@
+#!/bin/sh
+#
+# Copyright 2012 the V8 project authors. All rights reserved.
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+#       notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+#       copyright notice, this list of conditions and the following
+#       disclaimer in the documentation and/or other materials provided
+#       with the distribution.
+#     * Neither the name of Google Inc. nor the names of its
+#       contributors may be used to endorse or promote products derived
+#       from this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+########## Global variable definitions
+
+# Ensure that <your CPU clock> / $SAMPLE_EVERY_N_CYCLES < $MAXIMUM_SAMPLE_RATE.
+MAXIMUM_SAMPLE_RATE=10000000
+SAMPLE_EVERY_N_CYCLES=10000
+SAMPLE_RATE_CONFIG_FILE="/proc/sys/kernel/perf_event_max_sample_rate"
+KERNEL_MAP_CONFIG_FILE="/proc/sys/kernel/kptr_restrict"
+
+########## Usage
+
+usage() {
+cat << EOF
+usage: $0 <benchmark_command>
+
+Executes <benchmark_command> under observation by the kernel's "perf" \
+framework, then calls the low level tick processor to analyze the results.
+EOF
+}
+
+if [ $# -eq 0 ] || [ "$1" == "-h" ]  || [ "$1" == "--help" ] ; then
+  usage
+  exit 1
+fi
+
+########## Actual script execution
+
+ACTUAL_SAMPLE_RATE=$(cat $SAMPLE_RATE_CONFIG_FILE)
+if [ "$ACTUAL_SAMPLE_RATE" -lt "$MAXIMUM_SAMPLE_RATE" ] ; then
+  echo "Setting appropriate maximum sample rate..."
+  echo $MAXIMUM_SAMPLE_RATE | sudo tee $SAMPLE_RATE_CONFIG_FILE
+fi
+
+ACTUAL_KERNEL_MAP_RESTRICTION=$(cat $KERNEL_MAP_CONFIG_FILE)
+if [ "$ACTUAL_KERNEL_MAP_RESTRICTION" -ne "0" ] ; then
+  echo "Disabling kernel address map restriction..."
+  echo 0 | sudo tee $KERNEL_MAP_CONFIG_FILE
+fi
+
+echo "Running benchmark..."
+perf record -R -e cycles -c $SAMPLE_EVERY_N_CYCLES -f -i $@ --ll-prof
diff --git a/deps/v8/tools/run-tests.py b/deps/v8/tools/run-tests.py
new file mode 100755
index 0000000000..c09ea064d9
--- /dev/null
+++ b/deps/v8/tools/run-tests.py
@@ -0,0 +1,369 @@
+#!/usr/bin/env python
+#
+# Copyright 2012 the V8 project authors. All rights reserved.
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+#       notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+#       copyright notice, this list of conditions and the following
+#       disclaimer in the documentation and/or other materials provided
+#       with the distribution.
+#     * Neither the name of Google Inc. nor the names of its
+#       contributors may be used to endorse or promote products derived
+#       from this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+
+import multiprocessing
+import optparse
+import os
+from os.path import join
+import subprocess
+import sys
+import time
+
+from testrunner.local import execution
+from testrunner.local import progress
+from testrunner.local import testsuite
+from testrunner.local import utils
+from testrunner.local import verbose
+from testrunner.network import network_execution
+from testrunner.objects import context
+
+
+ARCH_GUESS = utils.DefaultArch()
+DEFAULT_TESTS = ["mjsunit", "cctest", "message", "preparser"]
+TIMEOUT_DEFAULT = 60
+TIMEOUT_SCALEFACTOR = {"debug"   : 4,
+                       "release" : 1 }
+
+# Use this to run several variants of the tests.
+VARIANT_FLAGS = [[],
+                 ["--stress-opt", "--always-opt"],
+                 ["--nocrankshaft"]]
+MODE_FLAGS = {
+    "debug"   : ["--nobreak-on-abort", "--nodead-code-elimination",
+                 "--enable-slow-asserts", "--debug-code", "--verify-heap"],
+    "release" : ["--nobreak-on-abort", "--nodead-code-elimination"]}
+
+SUPPORTED_ARCHS = ["android_arm",
+                   "android_ia32",
+                   "arm",
+                   "ia32",
+                   "mipsel",
+                   "x64"]
+# Double the timeout for these:
+SLOW_ARCHS = ["android_arm",
+              "android_ia32",
+              "arm",
+              "mipsel"]
+
+
+def BuildOptions():
+  result = optparse.OptionParser()
+  result.add_option("--arch",
+                    help=("The architecture to run tests for, "
+                          "'auto' or 'native' for auto-detect"),
+                    default="ia32,x64,arm")
+  result.add_option("--arch-and-mode",
+                    help="Architecture and mode in the format 'arch.mode'",
+                    default=None)
+  result.add_option("--buildbot",
+                    help="Adapt to path structure used on buildbots",
+                    default=False, action="store_true")
+  result.add_option("--cat", help="Print the source of the tests",
+                    default=False, action="store_true")
+  result.add_option("--command-prefix",
+                    help="Prepended to each shell command used to run a test",
+                    default="")
+  result.add_option("--download-data", help="Download missing test suite data",
+                    default=False, action="store_true")
+  result.add_option("--extra-flags",
+                    help="Additional flags to pass to each test command",
+                    default="")
+  result.add_option("--isolates", help="Whether to test isolates",
+                    default=False, action="store_true")
+  result.add_option("-j", help="The number of parallel tasks to run",
+                    default=0, type="int")
+  result.add_option("-m", "--mode",
+                    help="The test modes in which to run (comma-separated)",
+                    default="release,debug")
+  result.add_option("--no-network", "--nonetwork",
+                    help="Don't distribute tests on the network",
+                    default=(utils.GuessOS() != "linux"),
+                    dest="no_network", action="store_true")
+  result.add_option("--no-presubmit", "--nopresubmit",
+                    help='Skip presubmit checks',
+                    default=False, dest="no_presubmit", action="store_true")
+  result.add_option("--no-stress", "--nostress",
+                    help="Don't run crankshaft --always-opt --stress-op test",
+                    default=False, dest="no_stress", action="store_true")
+  result.add_option("--outdir", help="Base directory with compile output",
+                    default="out")
+  result.add_option("-p", "--progress",
+                    help=("The style of progress indicator"
+                          " (verbose, dots, color, mono)"),
+                    choices=progress.PROGRESS_INDICATORS.keys(), default="mono")
+  result.add_option("--report", help="Print a summary of the tests to be run",
+                    default=False, action="store_true")
+  result.add_option("--shard-count",
+                    help="Split testsuites into this number of shards",
+                    default=1, type="int")
+  result.add_option("--shard-run",
+                    help="Run this shard from the split up tests.",
+                    default=1, type="int")
+  result.add_option("--shell", help="DEPRECATED! use --shell-dir", default="")
+  result.add_option("--shell-dir", help="Directory containing executables",
+                    default="")
+  result.add_option("--stress-only",
+                    help="Only run tests with --always-opt --stress-opt",
+                    default=False, action="store_true")
+  result.add_option("--time", help="Print timing information after running",
+                    default=False, action="store_true")
+  result.add_option("-t", "--timeout", help="Timeout in seconds",
+                    default= -1, type="int")
+  result.add_option("-v", "--verbose", help="Verbose output",
+                    default=False, action="store_true")
+  result.add_option("--valgrind", help="Run tests through valgrind",
+                    default=False, action="store_true")
+  result.add_option("--warn-unused", help="Report unused rules",
+                    default=False, action="store_true")
+  return result
+
+
+def ProcessOptions(options):
+  global VARIANT_FLAGS
+
+  # Architecture and mode related stuff.
+  if options.arch_and_mode:
+    tokens = options.arch_and_mode.split(".")
+    options.arch = tokens[0]
+    options.mode = tokens[1]
+  options.mode = options.mode.split(",")
+  for mode in options.mode:
+    if not mode in ["debug", "release"]:
+      print "Unknown mode %s" % mode
+      return False
+  if options.arch in ["auto", "native"]:
+    options.arch = ARCH_GUESS
+  options.arch = options.arch.split(",")
+  for arch in options.arch:
+    if not arch in SUPPORTED_ARCHS:
+      print "Unknown architecture %s" % arch
+      return False
+
+  # Special processing of other options, sorted alphabetically.
+
+  if options.buildbot:
+    # Buildbots run presubmit tests as a separate step.
+    options.no_presubmit = True
+    options.no_network = True
+  if options.command_prefix:
+    print("Specifying --command-prefix disables network distribution, "
+          "running tests locally.")
+    options.no_network = True
+  if options.j == 0:
+    options.j = multiprocessing.cpu_count()
+  if options.no_stress:
+    VARIANT_FLAGS = [[], ["--nocrankshaft"]]
+  if not options.shell_dir:
+    if options.shell:
+      print "Warning: --shell is deprecated, use --shell-dir instead."
+      options.shell_dir = os.path.dirname(options.shell)
+  if options.stress_only:
+    VARIANT_FLAGS = [["--stress-opt", "--always-opt"]]
+  if options.valgrind:
+    run_valgrind = os.path.join("tools", "run-valgrind.py")
+    # This is OK for distributed running, so we don't need to set no_network.
+    options.command_prefix = ("python -u " + run_valgrind +
+                              options.command_prefix)
+  return True
+
+
+def ShardTests(tests, shard_count, shard_run):
+  if shard_count < 2:
+    return tests
+  if shard_run < 1 or shard_run > shard_count:
+    print "shard-run not a valid number, should be in [1:shard-count]"
+    print "defaulting back to running all tests"
+    return tests
+  count = 0
+  shard = []
+  for test in tests:
+    if count % shard_count == shard_run - 1:
+      shard.append(test)
+    count += 1
+  return shard
+
+
+def Main():
+  parser = BuildOptions()
+  (options, args) = parser.parse_args()
+  if not ProcessOptions(options):
+    parser.print_help()
+    return 1
+
+  exit_code = 0
+  workspace = os.path.abspath(join(os.path.dirname(sys.argv[0]), ".."))
+  if not options.no_presubmit:
+    print ">>> running presubmit tests"
+    code = subprocess.call(
+        [sys.executable, join(workspace, "tools", "presubmit.py")])
+    exit_code = code
+
+  suite_paths = utils.GetSuitePaths(join(workspace, "test"))
+
+  if len(args) == 0:
+    suite_paths = [ s for s in suite_paths if s in DEFAULT_TESTS ]
+  else:
+    args_suites = set()
+    for arg in args:
+      suite = arg.split(os.path.sep)[0]
+      if not suite in args_suites:
+        args_suites.add(suite)
+    suite_paths = [ s for s in suite_paths if s in args_suites ]
+
+  suites = []
+  for root in suite_paths:
+    suite = testsuite.TestSuite.LoadTestSuite(
+        os.path.join(workspace, "test", root))
+    if suite:
+      suites.append(suite)
+
+  if options.download_data:
+    for s in suites:
+      s.DownloadData()
+
+  for mode in options.mode:
+    for arch in options.arch:
+      code = Execute(arch, mode, args, options, suites, workspace)
+      exit_code = exit_code or code
+  return exit_code
+
+
+def Execute(arch, mode, args, options, suites, workspace):
+  print(">>> Running tests for %s.%s" % (arch, mode))
+
+  shell_dir = options.shell_dir
+  if not shell_dir:
+    if options.buildbot:
+      shell_dir = os.path.join(workspace, options.outdir, mode)
+      mode = mode.lower()
+    else:
+      shell_dir = os.path.join(workspace, options.outdir,
+                               "%s.%s" % (arch, mode))
+  shell_dir = os.path.relpath(shell_dir)
+
+  # Populate context object.
+  mode_flags = MODE_FLAGS[mode]
+  timeout = options.timeout
+  if timeout == -1:
+    # Simulators are slow, therefore allow a longer default timeout.
+    if arch in SLOW_ARCHS:
+      timeout = 2 * TIMEOUT_DEFAULT;
+    else:
+      timeout = TIMEOUT_DEFAULT;
+
+  timeout *= TIMEOUT_SCALEFACTOR[mode]
+  ctx = context.Context(arch, mode, shell_dir,
+                        mode_flags, options.verbose,
+                        timeout, options.isolates,
+                        options.command_prefix,
+                        options.extra_flags)
+
+  # Find available test suites and read test cases from them.
+  variables = {
+    "mode": mode,
+    "arch": arch,
+    "system": utils.GuessOS(),
+    "isolates": options.isolates
+  }
+  all_tests = []
+  num_tests = 0
+  test_id = 0
+  for s in suites:
+    s.ReadStatusFile(variables)
+    s.ReadTestCases(ctx)
+    if len(args) > 0:
+      s.FilterTestCasesByArgs(args)
+    all_tests += s.tests
+    s.FilterTestCasesByStatus(options.warn_unused)
+    if options.cat:
+      verbose.PrintTestSource(s.tests)
+      continue
+    variant_flags = s.VariantFlags() or VARIANT_FLAGS
+    s.tests = [ t.CopyAddingFlags(v) for t in s.tests for v in variant_flags ]
+    s.tests = ShardTests(s.tests, options.shard_count, options.shard_run)
+    num_tests += len(s.tests)
+    for t in s.tests:
+      t.id = test_id
+      test_id += 1
+
+  if options.cat:
+    return 0  # We're done here.
+
+  if options.report:
+    verbose.PrintReport(all_tests)
+
+  if num_tests == 0:
+    print "No tests to run."
+    return 0
+
+  # Run the tests, either locally or distributed on the network.
+  try:
+    start_time = time.time()
+    progress_indicator = progress.PROGRESS_INDICATORS[options.progress]()
+
+    run_networked = not options.no_network
+    if not run_networked:
+      print("Network distribution disabled, running tests locally.")
+    elif utils.GuessOS() != "linux":
+      print("Network distribution is only supported on Linux, sorry!")
+      run_networked = False
+    peers = []
+    if run_networked:
+      peers = network_execution.GetPeers()
+      if not peers:
+        print("No connection to distribution server; running tests locally.")
+        run_networked = False
+      elif len(peers) == 1:
+        print("No other peers on the network; running tests locally.")
+        run_networked = False
+      elif num_tests <= 100:
+        print("Less than 100 tests, running them locally.")
+        run_networked = False
+
+    if run_networked:
+      runner = network_execution.NetworkedRunner(suites, progress_indicator,
+                                                 ctx, peers, workspace)
+    else:
+      runner = execution.Runner(suites, progress_indicator, ctx)
+
+    exit_code = runner.Run(options.j)
+    if runner.terminate:
+      return exit_code
+    overall_duration = time.time() - start_time
+  except KeyboardInterrupt:
+    return 1
+
+  if options.time:
+    verbose.PrintTestDurations(suites, overall_duration)
+  return exit_code
+
+
+if __name__ == "__main__":
+  sys.exit(Main())
diff --git a/deps/v8/tools/status-file-converter.py b/deps/v8/tools/status-file-converter.py
new file mode 100755
index 0000000000..ba063ee8c7
--- /dev/null
+++ b/deps/v8/tools/status-file-converter.py
@@ -0,0 +1,39 @@
+#!/usr/bin/env python
+#
+# Copyright 2012 the V8 project authors. All rights reserved.
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+#       notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+#       copyright notice, this list of conditions and the following
+#       disclaimer in the documentation and/or other materials provided
+#       with the distribution.
+#     * Neither the name of Google Inc. nor the names of its
+#       contributors may be used to endorse or promote products derived
+#       from this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+
+import sys
+from testrunner.local import old_statusfile
+
+if len(sys.argv) != 2:
+  print "Usage: %s foo.status" % sys.argv[0]
+  print "Will read foo.status and print the converted version to stdout."
+  sys.exit(1)
+
+print old_statusfile.ConvertNotation(sys.argv[1]).GetOutput()
diff --git a/deps/v8/tools/test-server.py b/deps/v8/tools/test-server.py
new file mode 100755
index 0000000000..df547ed94d
--- /dev/null
+++ b/deps/v8/tools/test-server.py
@@ -0,0 +1,224 @@
+#!/usr/bin/env python
+#
+# Copyright 2012 the V8 project authors. All rights reserved.
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+#       notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+#       copyright notice, this list of conditions and the following
+#       disclaimer in the documentation and/or other materials provided
+#       with the distribution.
+#     * Neither the name of Google Inc. nor the names of its
+#       contributors may be used to endorse or promote products derived
+#       from this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+
+import os
+import subprocess
+import sys
+
+
+PIDFILE = "/tmp/v8-distributed-testing-server.pid"
+ROOT = os.path.abspath(os.path.dirname(sys.argv[0]))
+
+
+def _PrintUsage():
+  print("""Usage: python %s COMMAND
+
+Where COMMAND can be any of:
+  start     Starts the server. Forks to the background.
+  stop      Stops the server.
+  restart   Stops, then restarts the server.
+  setup     Creates or updates the environment for the server to run.
+  update    Alias for "setup".
+  trust <keyfile>  Adds the given public key to the list of trusted keys.
+  help      Displays this help text.
+  """ % sys.argv[0])
+
+
+def _IsDaemonRunning():
+  return os.path.exists(PIDFILE)
+
+
+def _Cmd(cmd):
+  code = subprocess.call(cmd, shell=True)
+  if code != 0:
+    print("Command '%s' returned error code %d" % (cmd, code))
+    sys.exit(code)
+
+
+def Update():
+  # Create directory for private data storage.
+  data_dir = os.path.join(ROOT, "data")
+  if not os.path.exists(data_dir):
+    os.makedirs(data_dir)
+
+  # Create directory for trusted public keys of peers (and self).
+  trusted_dir = os.path.join(ROOT, "trusted")
+  if not os.path.exists(trusted_dir):
+    os.makedirs(trusted_dir)
+
+  # Install UltraJSON. It is much faster than Python's builtin json.
+  try:
+    import ujson  #@UnusedImport
+  except ImportError:
+    # Install pip if it doesn't exist.
+    code = subprocess.call("which pip > /dev/null", shell=True)
+    if code != 0:
+      apt_get_code = subprocess.call("which apt-get > /dev/null", shell=True)
+      if apt_get_code == 0:
+        print("Installing pip...")
+        _Cmd("sudo apt-get install python-pip")
+      else:
+        print("Please install pip on your machine. You can get it at: "
+              "http://www.pip-installer.org/en/latest/installing.html "
+              "or via your distro's package manager.")
+        sys.exit(1)
+    print("Using pip to install UltraJSON...")
+    _Cmd("sudo pip install ujson")
+
+  # Make sure we have a key pair for signing binaries.
+  privkeyfile = os.path.expanduser("~/.ssh/v8_dtest")
+  if not os.path.exists(privkeyfile):
+    _Cmd("ssh-keygen -t rsa -f %s -N '' -q" % privkeyfile)
+  fingerprint = subprocess.check_output("ssh-keygen -lf %s" % privkeyfile,
+                                        shell=True)
+  fingerprint = fingerprint.split(" ")[1].replace(":", "")[:16]
+  pubkeyfile = os.path.join(trusted_dir, "%s.pem" % fingerprint)
+  if (not os.path.exists(pubkeyfile) or
+      os.path.getmtime(pubkeyfile) < os.path.getmtime(privkeyfile)):
+    _Cmd("openssl rsa -in %s -out %s -pubout" % (privkeyfile, pubkeyfile))
+    with open(pubkeyfile, "a") as f:
+      f.write(fingerprint + "\n")
+    datafile = os.path.join(data_dir, "mypubkey")
+    with open(datafile, "w") as f:
+      f.write(fingerprint + "\n")
+
+  # Check out or update the server implementation in the current directory.
+  testrunner_dir = os.path.join(ROOT, "testrunner")
+  if os.path.exists(os.path.join(testrunner_dir, "server/daemon.py")):
+    _Cmd("cd %s; svn up" % testrunner_dir)
+  else:
+    path = ("http://v8.googlecode.com/svn/branches/bleeding_edge/"
+            "tools/testrunner")
+    _Cmd("svn checkout --force %s %s" % (path, testrunner_dir))
+
+  # Update this very script.
+  path = ("http://v8.googlecode.com/svn/branches/bleeding_edge/"
+          "tools/test-server.py")
+  scriptname = os.path.abspath(sys.argv[0])
+  _Cmd("svn cat %s > %s" % (path, scriptname))
+
+  # The testcfg.py files currently need to be able to import the old test.py
+  # script, so we temporarily need to make that available.
+  # TODO(jkummerow): Remove this when removing test.py.
+  for filename in ("test.py", "utils.py"):
+    url = ("http://v8.googlecode.com/svn/branches/bleeding_edge/"
+           "tools/%s" % filename)
+    filepath = os.path.join(os.path.dirname(scriptname), filename)
+    _Cmd("svn cat %s > %s" % (url, filepath))
+
+  # Check out or update V8.
+  v8_dir = os.path.join(ROOT, "v8")
+  if os.path.exists(v8_dir):
+    _Cmd("cd %s; git fetch" % v8_dir)
+  else:
+    _Cmd("git clone git://github.com/v8/v8.git %s" % v8_dir)
+
+  print("Finished.")
+
+
+# Handle "setup" here, because when executing that we can't import anything
+# else yet.
+if __name__ == "__main__" and len(sys.argv) == 2:
+  if sys.argv[1] in ("setup", "update"):
+    if _IsDaemonRunning():
+      print("Please stop the server before updating. Exiting.")
+      sys.exit(1)
+    Update()
+    sys.exit(0)
+  # Other parameters are handled below.
+
+
+#==========================================================
+# At this point we can assume that the implementation is available,
+# so we can import it.
+try:
+  from testrunner.server import constants
+  from testrunner.server import local_handler
+  from testrunner.server import main
+except Exception, e:
+  print(e)
+  print("Failed to import implementation. Have you run 'setup'?")
+  sys.exit(1)
+
+
+def _StartDaemon(daemon):
+  if not os.path.isdir(os.path.join(ROOT, "v8")):
+    print("No 'v8' working directory found. Have you run 'setup'?")
+    sys.exit(1)
+  daemon.start()
+
+
+if __name__ == "__main__":
+  if len(sys.argv) == 2:
+    arg = sys.argv[1]
+    if arg == "start":
+      daemon = main.Server(PIDFILE, ROOT)
+      _StartDaemon(daemon)
+    elif arg == "stop":
+      daemon = main.Server(PIDFILE, ROOT)
+      daemon.stop()
+    elif arg == "restart":
+      daemon = main.Server(PIDFILE, ROOT)
+      daemon.stop()
+      _StartDaemon(daemon)
+    elif arg in ("help", "-h", "--help"):
+      _PrintUsage()
+    elif arg == "status":
+      if not _IsDaemonRunning():
+        print("Server not running.")
+      else:
+        print(local_handler.LocalQuery([constants.REQUEST_STATUS]))
+    else:
+      print("Unknown command")
+      _PrintUsage()
+      sys.exit(2)
+  elif len(sys.argv) == 3:
+    arg = sys.argv[1]
+    if arg == "approve":
+      filename = sys.argv[2]
+      if not os.path.exists(filename):
+        print("%s does not exist.")
+        sys.exit(1)
+      filename = os.path.abspath(filename)
+      if _IsDaemonRunning():
+        response = local_handler.LocalQuery([constants.ADD_TRUSTED, filename])
+      else:
+        daemon = main.Server(PIDFILE, ROOT)
+        response = daemon.CopyToTrusted(filename)
+      print("Added certificate %s to trusted certificates." % response)
+    else:
+      print("Unknown command")
+      _PrintUsage()
+      sys.exit(2)
+  else:
+    print("Unknown command")
+    _PrintUsage()
+    sys.exit(2)
+  sys.exit(0)
diff --git a/deps/v8/tools/test.py b/deps/v8/tools/test.py
index c361f93737..b3b62b3a63 100755
--- a/deps/v8/tools/test.py
+++ b/deps/v8/tools/test.py
@@ -684,8 +684,9 @@ SUFFIX = {
     'debug'   : '_g',
     'release' : '' }
 FLAGS = {
-    'debug'   : ['--nobreak-on-abort', '--enable-slow-asserts', '--debug-code', '--verify-heap'],
-    'release' : ['--nobreak-on-abort']}
+    'debug'   : ['--nobreak-on-abort', '--nodead-code-elimination',
+                 '--enable-slow-asserts', '--debug-code', '--verify-heap'],
+    'release' : ['--nobreak-on-abort', '--nodead-code-elimination']}
 TIMEOUT_SCALEFACTOR = {
     'debug'   : 4,
     'release' : 1 }
@@ -1370,8 +1371,9 @@ def GetSpecialCommandProcessor(value):
   else:
     pos = value.find('@')
     import urllib
-    prefix = urllib.unquote(value[:pos]).split()
-    suffix = urllib.unquote(value[pos+1:]).split()
+    import shlex
+    prefix = shlex.split(urllib.unquote(value[:pos]))
+    suffix = shlex.split(urllib.unquote(value[pos+1:]))
     def ExpandCommand(args):
       return prefix + args + suffix
     return ExpandCommand
diff --git a/deps/v8/tools/testrunner/README b/deps/v8/tools/testrunner/README
new file mode 100644
index 0000000000..8f0c01f52a
--- /dev/null
+++ b/deps/v8/tools/testrunner/README
@@ -0,0 +1,174 @@
+Test suite runner for V8, including support for distributed running.
+====================================================================
+
+
+Local usage instructions:
+=========================
+
+Run the main script with --help to get detailed usage instructions:
+
+$ tools/run-tests.py --help
+
+The interface is mostly the same as it was for the old test runner.
+You'll likely want something like this:
+
+$ tools/run-tests.py --nonetwork --arch ia32 --mode release
+
+--nonetwork is the default on Mac and Windows. If you don't specify --arch
+and/or --mode, all available values will be used and run in turn (e.g.,
+omitting --mode from the above example will run ia32 in both Release and Debug
+modes).
+
+
+Networked usage instructions:
+=============================
+
+Networked running is only supported on Linux currently. Make sure that all
+machines participating in the cluster are binary-compatible (e.g. mixing
+Ubuntu Lucid and Precise doesn't work).
+
+Setup:
+------
+
+1.) Copy tools/test-server.py to a new empty directory anywhere on your hard
+    drive (preferably not inside your V8 checkout just to keep things clean).
+    Please do create a copy, not just a symlink.
+
+2.) Navigate to the new directory and let the server setup itself:
+
+$ ./test-server.py setup
+
+    This will install PIP and UltraJSON, create a V8 working directory, and
+    generate a keypair.
+
+3.) Swap public keys with someone who's already part of the networked cluster.
+
+$ cp trusted/`cat data/mypubkey`.pem /where/peers/can/see/it/myname.pem
+$ ./test-server.py approve /wherever/they/put/it/yourname.pem
+
+
+Usage:
+------
+
+1.) Start your server:
+
+$ ./test-server.py start
+
+2.) (Optionally) inspect the server's status:
+
+$ ./test-server.py status
+
+3.) From your regular V8 working directory, run tests:
+
+$ tool/run-tests.py --arch ia32 --mode debug
+
+4.) (Optionally) enjoy the speeeeeeeeeeeeeeeed
+
+
+Architecture overview:
+======================
+
+Code organization:
+------------------
+
+This section is written from the point of view of the tools/ directory.
+
+./run-tests.py:
+  Main script. Parses command-line options and drives the test execution
+  procedure from a high level. Imports the actual implementation of all
+  steps from the testrunner/ directory.
+
+./test-server.py:
+  Interface to interact with the server. Contains code to setup the server's
+  working environment and can start and stop server daemon processes.
+  Imports some stuff from the testrunner/server/ directory.
+
+./testrunner/local/*:
+  Implementation needed to run tests locally. Used by run-tests.py. Inspired by
+  (and partly copied verbatim from) the original test.py script.
+
+./testrunner/local/old_statusfile.py:
+  Provides functionality to read an old-style <testsuite>.status file and
+  convert it to new-style syntax. This can be removed once the new-style
+  syntax becomes authoritative (and old-style syntax is no longer supported).
+  ./status-file-converter.py provides a stand-alone interface to this.
+
+./testrunner/objects/*:
+  A bunch of data container classes, used by the scripts in the various other
+  directories; serializable for transmission over the network.
+
+./testrunner/network/*:
+  Equivalents and extensions of some of the functionality in ./testrunner/local/
+  as required when dispatching tests to peers on the network.
+
+./testrunner/network/network_execution.py:
+  Drop-in replacement for ./testrunner/local/execution that distributes
+  test jobs to network peers instead of running them locally.
+
+./testrunner/network/endpoint.py:
+  Receiving end of a network distributed job, uses the implementation
+  in ./testrunner/local/execution.py for actually running the tests.
+
+./testrunner/server/*:
+  Implementation of the daemon that accepts and runs test execution jobs from
+  peers on the network. Should ideally have no dependencies on any of the other
+  directories, but that turned out to be impractical, so there are a few
+  exceptions.
+
+./testrunner/server/compression.py:
+  Defines a wrapper around Python TCP sockets that provides JSON based
+  serialization, gzip based compression, and ensures message completeness.
+
+
+Networking architecture:
+------------------------
+
+The distribution stuff is designed to be a layer between deciding which tests
+to run on the one side, and actually running them on the other. The frontend
+that the user interacts with is the same for local and networked execution,
+and the actual test execution and result gathering code is the same too.
+
+The server daemon starts four separate servers, each listening on another port:
+- "Local": Communication with a run-tests.py script running on the same host.
+  The test driving script e.g. needs to ask for available peers. It then talks
+  to those peers directly (one of them will be the locally running server).
+- "Work": Listens for test job requests from run-tests.py scripts on the network
+  (including localhost). Accepts an arbitrary number of connections at the
+  same time, but only works on them in a serialized fashion.
+- "Status": Used for communication with other servers on the network, e.g. for
+  exchanging trusted public keys to create the transitive trust closure.
+- "Discovery": Used to detect presence of other peers on the network.
+  In contrast to the other three, this uses UDP (as opposed to TCP).
+
+
+Give us a diagram! We love diagrams!
+------------------------------------
+                                     .
+                         Machine A   .  Machine B
+                                     .
++------------------------------+     .
+|        run-tests.py          |     .
+|         with flag:           |     .
+|--nonetwork   --network       |     .
+|   |          /    |          |     .
+|   |         /     |          |     .
+|   v        /      v          |     .
+|BACKEND    /   distribution   |     .
++--------- / --------| \ ------+     .
+          /          |  \_____________________
+         /           |               .        \
+        /            |               .         \
++----- v ----------- v --------+     .    +---- v -----------------------+
+| LocalHandler | WorkHandler   |     .    | WorkHandler   | LocalHandler |
+|              |     |         |     .    |     |         |              |
+|              |     v         |     .    |     v         |              |
+|              |  BACKEND      |     .    |  BACKEND      |              |
+|------------- +---------------|     .    |---------------+--------------|
+| Discovery    | StatusHandler <----------> StatusHandler | Discovery    |
++---- ^ -----------------------+     .    +-------------------- ^ -------+
+      |                              .                          |
+      +---------------------------------------------------------+
+
+Note that the three occurrences of "BACKEND" are the same code
+(testrunner/local/execution.py and its imports), but running from three
+distinct directories (and on two different machines).
diff --git a/deps/v8/tools/testrunner/__init__.py b/deps/v8/tools/testrunner/__init__.py
new file mode 100644
index 0000000000..202a262709
--- /dev/null
+++ b/deps/v8/tools/testrunner/__init__.py
@@ -0,0 +1,26 @@
+# Copyright 2012 the V8 project authors. All rights reserved.
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+#       notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+#       copyright notice, this list of conditions and the following
+#       disclaimer in the documentation and/or other materials provided
+#       with the distribution.
+#     * Neither the name of Google Inc. nor the names of its
+#       contributors may be used to endorse or promote products derived
+#       from this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/deps/v8/tools/testrunner/local/__init__.py b/deps/v8/tools/testrunner/local/__init__.py
new file mode 100644
index 0000000000..202a262709
--- /dev/null
+++ b/deps/v8/tools/testrunner/local/__init__.py
@@ -0,0 +1,26 @@
+# Copyright 2012 the V8 project authors. All rights reserved.
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+#       notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+#       copyright notice, this list of conditions and the following
+#       disclaimer in the documentation and/or other materials provided
+#       with the distribution.
+#     * Neither the name of Google Inc. nor the names of its
+#       contributors may be used to endorse or promote products derived
+#       from this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/deps/v8/tools/testrunner/local/commands.py b/deps/v8/tools/testrunner/local/commands.py
new file mode 100644
index 0000000000..01f170dc87
--- /dev/null
+++ b/deps/v8/tools/testrunner/local/commands.py
@@ -0,0 +1,153 @@
+# Copyright 2012 the V8 project authors. All rights reserved.
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+#       notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+#       copyright notice, this list of conditions and the following
+#       disclaimer in the documentation and/or other materials provided
+#       with the distribution.
+#     * Neither the name of Google Inc. nor the names of its
+#       contributors may be used to endorse or promote products derived
+#       from this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+
+import os
+import signal
+import subprocess
+import sys
+import tempfile
+import time
+
+from ..local import utils
+from ..objects import output
+
+
+def KillProcessWithID(pid):
+  if utils.IsWindows():
+    os.popen('taskkill /T /F /PID %d' % pid)
+  else:
+    os.kill(pid, signal.SIGTERM)
+
+
+MAX_SLEEP_TIME = 0.1
+INITIAL_SLEEP_TIME = 0.0001
+SLEEP_TIME_FACTOR = 1.25
+
+SEM_INVALID_VALUE = -1
+SEM_NOGPFAULTERRORBOX = 0x0002  # Microsoft Platform SDK WinBase.h
+
+
+def Win32SetErrorMode(mode):
+  prev_error_mode = SEM_INVALID_VALUE
+  try:
+    import ctypes
+    prev_error_mode = \
+        ctypes.windll.kernel32.SetErrorMode(mode)  #@UndefinedVariable
+  except ImportError:
+    pass
+  return prev_error_mode
+
+
+def RunProcess(verbose, timeout, args, **rest):
+  if verbose: print "#", " ".join(args)
+  popen_args = args
+  prev_error_mode = SEM_INVALID_VALUE
+  if utils.IsWindows():
+    popen_args = subprocess.list2cmdline(args)
+    # Try to change the error mode to avoid dialogs on fatal errors. Don't
+    # touch any existing error mode flags by merging the existing error mode.
+    # See http://blogs.msdn.com/oldnewthing/archive/2004/07/27/198410.aspx.
+    error_mode = SEM_NOGPFAULTERRORBOX
+    prev_error_mode = Win32SetErrorMode(error_mode)
+    Win32SetErrorMode(error_mode | prev_error_mode)
+  process = subprocess.Popen(
+    shell=utils.IsWindows(),
+    args=popen_args,
+    **rest
+  )
+  if (utils.IsWindows() and prev_error_mode != SEM_INVALID_VALUE):
+    Win32SetErrorMode(prev_error_mode)
+  # Compute the end time - if the process crosses this limit we
+  # consider it timed out.
+  if timeout is None: end_time = None
+  else: end_time = time.time() + timeout
+  timed_out = False
+  # Repeatedly check the exit code from the process in a
+  # loop and keep track of whether or not it times out.
+  exit_code = None
+  sleep_time = INITIAL_SLEEP_TIME
+  try:
+    while exit_code is None:
+      if (not end_time is None) and (time.time() >= end_time):
+        # Kill the process and wait for it to exit.
+        KillProcessWithID(process.pid)
+        exit_code = process.wait()
+        timed_out = True
+      else:
+        exit_code = process.poll()
+        time.sleep(sleep_time)
+        sleep_time = sleep_time * SLEEP_TIME_FACTOR
+        if sleep_time > MAX_SLEEP_TIME:
+          sleep_time = MAX_SLEEP_TIME
+    return (exit_code, timed_out)
+  except KeyboardInterrupt:
+    raise
+
+
+def PrintError(string):
+  sys.stderr.write(string)
+  sys.stderr.write("\n")
+
+
+def CheckedUnlink(name):
+  # On Windows, when run with -jN in parallel processes,
+  # OS often fails to unlink the temp file. Not sure why.
+  # Need to retry.
+  # Idea from https://bugs.webkit.org/attachment.cgi?id=75982&action=prettypatch
+  retry_count = 0
+  while retry_count < 30:
+    try:
+      os.unlink(name)
+      return
+    except OSError, e:
+      retry_count += 1
+      time.sleep(retry_count * 0.1)
+  PrintError("os.unlink() " + str(e))
+
+
+def Execute(args, verbose=False, timeout=None):
+  args = [ c for c in args if c != "" ]
+  (fd_out, outname) = tempfile.mkstemp()
+  (fd_err, errname) = tempfile.mkstemp()
+  try:
+    (exit_code, timed_out) = RunProcess(
+      verbose,
+      timeout,
+      args=args,
+      stdout=fd_out,
+      stderr=fd_err
+    )
+  except:
+    raise
+  os.close(fd_out)
+  os.close(fd_err)
+  out = file(outname).read()
+  errors = file(errname).read()
+  CheckedUnlink(outname)
+  CheckedUnlink(errname)
+  return output.Output(exit_code, timed_out, out, errors)
diff --git a/deps/v8/tools/testrunner/local/execution.py b/deps/v8/tools/testrunner/local/execution.py
new file mode 100644
index 0000000000..6004367913
--- /dev/null
+++ b/deps/v8/tools/testrunner/local/execution.py
@@ -0,0 +1,182 @@
+# Copyright 2012 the V8 project authors. All rights reserved.
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+#       notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+#       copyright notice, this list of conditions and the following
+#       disclaimer in the documentation and/or other materials provided
+#       with the distribution.
+#     * Neither the name of Google Inc. nor the names of its
+#       contributors may be used to endorse or promote products derived
+#       from this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+
+import multiprocessing
+import os
+import threading
+import time
+
+from . import commands
+from . import utils
+
+
+BREAK_NOW = -1
+EXCEPTION = -2
+
+
+class Job(object):
+  def __init__(self, command, dep_command, test_id, timeout, verbose):
+    self.command = command
+    self.dep_command = dep_command
+    self.id = test_id
+    self.timeout = timeout
+    self.verbose = verbose
+
+
+def RunTest(job):
+  try:
+    start_time = time.time()
+    if job.dep_command is not None:
+      dep_output = commands.Execute(job.dep_command, job.verbose, job.timeout)
+      # TODO(jkummerow): We approximate the test suite specific function
+      # IsFailureOutput() by just checking the exit code here. Currently
+      # only cctests define dependencies, for which this simplification is
+      # correct.
+      if dep_output.exit_code != 0:
+        return (job.id, dep_output, time.time() - start_time)
+    output = commands.Execute(job.command, job.verbose, job.timeout)
+    return (job.id, output, time.time() - start_time)
+  except KeyboardInterrupt:
+    return (-1, BREAK_NOW, 0)
+  except Exception, e:
+    print(">>> EXCEPTION: %s" % e)
+    return (-1, EXCEPTION, 0)
+
+
+class Runner(object):
+
+  def __init__(self, suites, progress_indicator, context):
+    self.tests = [ t for s in suites for t in s.tests ]
+    self._CommonInit(len(self.tests), progress_indicator, context)
+
+  def _CommonInit(self, num_tests, progress_indicator, context):
+    self.indicator = progress_indicator
+    progress_indicator.runner = self
+    self.context = context
+    self.succeeded = 0
+    self.total = num_tests
+    self.remaining = num_tests
+    self.failed = []
+    self.crashed = 0
+    self.terminate = False
+    self.lock = threading.Lock()
+
+  def Run(self, jobs):
+    self.indicator.Starting()
+    self._RunInternal(jobs)
+    self.indicator.Done()
+    if self.failed:
+      return 1
+    return 0
+
+  def _RunInternal(self, jobs):
+    pool = multiprocessing.Pool(processes=jobs)
+    test_map = {}
+    queue = []
+    queued_exception = None
+    for test in self.tests:
+      assert test.id >= 0
+      test_map[test.id] = test
+      try:
+        command = self.GetCommand(test)
+      except Exception, e:
+        # If this failed, save the exception and re-raise it later (after
+        # all other tests have had a chance to run).
+        queued_exception = e
+        continue
+      timeout = self.context.timeout
+      if ("--stress-opt" in test.flags or
+          "--stress-opt" in self.context.mode_flags or
+          "--stress-opt" in self.context.extra_flags):
+        timeout *= 4
+      if test.dependency is not None:
+        dep_command = [ c.replace(test.path, test.dependency) for c in command ]
+      else:
+        dep_command = None
+      job = Job(command, dep_command, test.id, timeout, self.context.verbose)
+      queue.append(job)
+    try:
+      kChunkSize = 1
+      it = pool.imap_unordered(RunTest, queue, kChunkSize)
+      for result in it:
+        test_id = result[0]
+        if test_id < 0:
+          if result[1] == BREAK_NOW:
+            self.terminate = True
+          else:
+            continue
+        if self.terminate:
+          pool.terminate()
+          pool.join()
+          raise BreakNowException("User pressed Ctrl+C or IO went wrong")
+        test = test_map[test_id]
+        self.indicator.AboutToRun(test)
+        test.output = result[1]
+        test.duration = result[2]
+        if test.suite.HasUnexpectedOutput(test):
+          self.failed.append(test)
+          if test.output.HasCrashed():
+            self.crashed += 1
+        else:
+          self.succeeded += 1
+        self.remaining -= 1
+        self.indicator.HasRun(test)
+    except KeyboardInterrupt:
+      pool.terminate()
+      pool.join()
+      raise
+    except Exception, e:
+      print("Exception: %s" % e)
+      pool.terminate()
+      pool.join()
+      raise
+    if queued_exception:
+      raise queued_exception
+    return
+
+
+  def GetCommand(self, test):
+    d8testflag = []
+    shell = test.suite.shell()
+    if shell == "d8":
+      d8testflag = ["--test"]
+    if utils.IsWindows():
+      shell += ".exe"
+    cmd = ([self.context.command_prefix] +
+           [os.path.abspath(os.path.join(self.context.shell_dir, shell))] +
+           d8testflag +
+           test.suite.GetFlagsForTestCase(test, self.context) +
+           [self.context.extra_flags])
+    return cmd
+
+
+class BreakNowException(Exception):
+  def __init__(self, value):
+    self.value = value
+  def __str__(self):
+    return repr(self.value)
diff --git a/deps/v8/tools/testrunner/local/old_statusfile.py b/deps/v8/tools/testrunner/local/old_statusfile.py
new file mode 100644
index 0000000000..a16941b83b
--- /dev/null
+++ b/deps/v8/tools/testrunner/local/old_statusfile.py
@@ -0,0 +1,460 @@
+# Copyright 2012 the V8 project authors. All rights reserved.
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+#       notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+#       copyright notice, this list of conditions and the following
+#       disclaimer in the documentation and/or other materials provided
+#       with the distribution.
+#     * Neither the name of Google Inc. nor the names of its
+#       contributors may be used to endorse or promote products derived
+#       from this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+
+import cStringIO
+import re
+
+# These outcomes can occur in a TestCase's outcomes list:
+SKIP = 'SKIP'
+FAIL = 'FAIL'
+PASS = 'PASS'
+OKAY = 'OKAY'
+TIMEOUT = 'TIMEOUT'
+CRASH = 'CRASH'
+SLOW = 'SLOW'
+# These are just for the status files and are mapped below in DEFS:
+FAIL_OK = 'FAIL_OK'
+PASS_OR_FAIL = 'PASS_OR_FAIL'
+
+KEYWORDS = {SKIP: SKIP,
+            FAIL: FAIL,
+            PASS: PASS,
+            OKAY: OKAY,
+            TIMEOUT: TIMEOUT,
+            CRASH: CRASH,
+            SLOW: SLOW,
+            FAIL_OK: FAIL_OK,
+            PASS_OR_FAIL: PASS_OR_FAIL}
+
+class Expression(object):
+  pass
+
+
+class Constant(Expression):
+
+  def __init__(self, value):
+    self.value = value
+
+  def Evaluate(self, env, defs):
+    return self.value
+
+
+class Variable(Expression):
+
+  def __init__(self, name):
+    self.name = name
+
+  def GetOutcomes(self, env, defs):
+    if self.name in env: return set([env[self.name]])
+    else: return set([])
+
+  def Evaluate(self, env, defs):
+    return env[self.name]
+
+  def __str__(self):
+    return self.name
+
+  def string(self, logical):
+    return self.__str__()
+
+
+class Outcome(Expression):
+
+  def __init__(self, name):
+    self.name = name
+
+  def GetOutcomes(self, env, defs):
+    if self.name in defs:
+      return defs[self.name].GetOutcomes(env, defs)
+    else:
+      return set([self.name])
+
+  def __str__(self):
+    if self.name in KEYWORDS:
+      return "%s" % KEYWORDS[self.name]
+    return "'%s'" % self.name
+
+  def string(self, logical):
+    if logical:
+      return "%s" % self.name
+    return self.__str__()
+
+
+class Operation(Expression):
+
+  def __init__(self, left, op, right):
+    self.left = left
+    self.op = op
+    self.right = right
+
+  def Evaluate(self, env, defs):
+    if self.op == '||' or self.op == ',':
+      return self.left.Evaluate(env, defs) or self.right.Evaluate(env, defs)
+    elif self.op == 'if':
+      return False
+    elif self.op == '==':
+      return not self.left.GetOutcomes(env, defs).isdisjoint(self.right.GetOutcomes(env, defs))
+    elif self.op == '!=':
+      return self.left.GetOutcomes(env, defs).isdisjoint(self.right.GetOutcomes(env, defs))
+    else:
+      assert self.op == '&&'
+      return self.left.Evaluate(env, defs) and self.right.Evaluate(env, defs)
+
+  def GetOutcomes(self, env, defs):
+    if self.op == '||' or self.op == ',':
+      return self.left.GetOutcomes(env, defs) | self.right.GetOutcomes(env, defs)
+    elif self.op == 'if':
+      if self.right.Evaluate(env, defs): return self.left.GetOutcomes(env, defs)
+      else: return set([])
+    else:
+      assert self.op == '&&'
+      return self.left.GetOutcomes(env, defs) & self.right.GetOutcomes(env, defs)
+
+  def __str__(self):
+    return self.string(False)
+
+  def string(self, logical=False):
+    if self.op == 'if':
+      return "['%s', %s]" % (self.right.string(True), self.left.string(logical))
+    elif self.op == "||" or self.op == ",":
+      if logical:
+        return "%s or %s" % (self.left.string(True), self.right.string(True))
+      else:
+        return "%s, %s" % (self.left, self.right)
+    elif self.op == "&&":
+      return "%s and %s" % (self.left.string(True), self.right.string(True))
+    return "%s %s %s" % (self.left.string(logical), self.op,
+                         self.right.string(logical))
+
+
+def IsAlpha(string):
+  for char in string:
+    if not (char.isalpha() or char.isdigit() or char == '_'):
+      return False
+  return True
+
+
+class Tokenizer(object):
+  """A simple string tokenizer that chops expressions into variables,
+  parens and operators"""
+
+  def __init__(self, expr):
+    self.index = 0
+    self.expr = expr
+    self.length = len(expr)
+    self.tokens = None
+
+  def Current(self, length=1):
+    if not self.HasMore(length): return ""
+    return self.expr[self.index:self.index + length]
+
+  def HasMore(self, length=1):
+    return self.index < self.length + (length - 1)
+
+  def Advance(self, count=1):
+    self.index = self.index + count
+
+  def AddToken(self, token):
+    self.tokens.append(token)
+
+  def SkipSpaces(self):
+    while self.HasMore() and self.Current().isspace():
+      self.Advance()
+
+  def Tokenize(self):
+    self.tokens = [ ]
+    while self.HasMore():
+      self.SkipSpaces()
+      if not self.HasMore():
+        return None
+      if self.Current() == '(':
+        self.AddToken('(')
+        self.Advance()
+      elif self.Current() == ')':
+        self.AddToken(')')
+        self.Advance()
+      elif self.Current() == '$':
+        self.AddToken('$')
+        self.Advance()
+      elif self.Current() == ',':
+        self.AddToken(',')
+        self.Advance()
+      elif IsAlpha(self.Current()):
+        buf = ""
+        while self.HasMore() and IsAlpha(self.Current()):
+          buf += self.Current()
+          self.Advance()
+        self.AddToken(buf)
+      elif self.Current(2) == '&&':
+        self.AddToken('&&')
+        self.Advance(2)
+      elif self.Current(2) == '||':
+        self.AddToken('||')
+        self.Advance(2)
+      elif self.Current(2) == '==':
+        self.AddToken('==')
+        self.Advance(2)
+      elif self.Current(2) == '!=':
+        self.AddToken('!=')
+        self.Advance(2)
+      else:
+        return None
+    return self.tokens
+
+
+class Scanner(object):
+  """A simple scanner that can serve out tokens from a given list"""
+
+  def __init__(self, tokens):
+    self.tokens = tokens
+    self.length = len(tokens)
+    self.index = 0
+
+  def HasMore(self):
+    return self.index < self.length
+
+  def Current(self):
+    return self.tokens[self.index]
+
+  def Advance(self):
+    self.index = self.index + 1
+
+
+def ParseAtomicExpression(scan):
+  if scan.Current() == "true":
+    scan.Advance()
+    return Constant(True)
+  elif scan.Current() == "false":
+    scan.Advance()
+    return Constant(False)
+  elif IsAlpha(scan.Current()):
+    name = scan.Current()
+    scan.Advance()
+    return Outcome(name)
+  elif scan.Current() == '$':
+    scan.Advance()
+    if not IsAlpha(scan.Current()):
+      return None
+    name = scan.Current()
+    scan.Advance()
+    return Variable(name.lower())
+  elif scan.Current() == '(':
+    scan.Advance()
+    result = ParseLogicalExpression(scan)
+    if (not result) or (scan.Current() != ')'):
+      return None
+    scan.Advance()
+    return result
+  else:
+    return None
+
+
+BINARIES = ['==', '!=']
+def ParseOperatorExpression(scan):
+  left = ParseAtomicExpression(scan)
+  if not left: return None
+  while scan.HasMore() and (scan.Current() in BINARIES):
+    op = scan.Current()
+    scan.Advance()
+    right = ParseOperatorExpression(scan)
+    if not right:
+      return None
+    left = Operation(left, op, right)
+  return left
+
+
+def ParseConditionalExpression(scan):
+  left = ParseOperatorExpression(scan)
+  if not left: return None
+  while scan.HasMore() and (scan.Current() == 'if'):
+    scan.Advance()
+    right = ParseOperatorExpression(scan)
+    if not right:
+      return None
+    left = Operation(left, 'if', right)
+  return left
+
+
+LOGICALS = ["&&", "||", ","]
+def ParseLogicalExpression(scan):
+  left = ParseConditionalExpression(scan)
+  if not left: return None
+  while scan.HasMore() and (scan.Current() in LOGICALS):
+    op = scan.Current()
+    scan.Advance()
+    right = ParseConditionalExpression(scan)
+    if not right:
+      return None
+    left = Operation(left, op, right)
+  return left
+
+
+def ParseCondition(expr):
+  """Parses a logical expression into an Expression object"""
+  tokens = Tokenizer(expr).Tokenize()
+  if not tokens:
+    print "Malformed expression: '%s'" % expr
+    return None
+  scan = Scanner(tokens)
+  ast = ParseLogicalExpression(scan)
+  if not ast:
+    print "Malformed expression: '%s'" % expr
+    return None
+  if scan.HasMore():
+    print "Malformed expression: '%s'" % expr
+    return None
+  return ast
+
+
+class Section(object):
+  """A section of the configuration file.  Sections are enabled or
+  disabled prior to running the tests, based on their conditions"""
+
+  def __init__(self, condition):
+    self.condition = condition
+    self.rules = [ ]
+
+  def AddRule(self, rule):
+    self.rules.append(rule)
+
+
+class Rule(object):
+  """A single rule that specifies the expected outcome for a single
+  test."""
+
+  def __init__(self, raw_path, path, value):
+    self.raw_path = raw_path
+    self.path = path
+    self.value = value
+
+  def GetOutcomes(self, env, defs):
+    return self.value.GetOutcomes(env, defs)
+
+  def Contains(self, path):
+    if len(self.path) > len(path):
+      return False
+    for i in xrange(len(self.path)):
+      if not self.path[i].match(path[i]):
+        return False
+    return True
+
+
+HEADER_PATTERN = re.compile(r'\[([^]]+)\]')
+RULE_PATTERN = re.compile(r'\s*([^: ]*)\s*:(.*)')
+DEF_PATTERN = re.compile(r'^def\s*(\w+)\s*=(.*)$')
+PREFIX_PATTERN = re.compile(r'^\s*prefix\s+([\w\_\.\-\/]+)$')
+
+
+class ConvertNotation(object):
+  def __init__(self, path):
+    self.path = path
+    self.indent = ""
+    self.comment = []
+    self.init = False
+    self.section = False
+    self.out = cStringIO.StringIO()
+
+  def OpenGlobal(self):
+    if self.init: return
+    self.WriteComment()
+    print >> self.out, "["
+    self.init = True
+
+  def CloseGlobal(self):
+    if not self.init: return
+    print >> self.out, "]"
+    self.init = False
+
+  def OpenSection(self, condition="ALWAYS"):
+    if self.section: return
+    self.OpenGlobal()
+    if type(condition) != str:
+      condition = "'%s'" % condition.string(True)
+    print >> self.out, "%s[%s, {" % (self.indent, condition)
+    self.indent += " " * 2
+    self.section = condition
+
+  def CloseSection(self):
+    if not self.section: return
+    self.indent = self.indent[:-2]
+    print >> self.out, "%s}],  # %s" % (self.indent, self.section)
+    self.section = False
+
+  def WriteComment(self):
+    if not self.comment: return
+    for c in self.comment:
+      if len(c.strip()) == 0:
+        print >> self.out, ""
+      else:
+        print >> self.out, "%s%s" % (self.indent, c),
+    self.comment = []
+
+  def GetOutput(self):
+    with open(self.path) as f:
+      for line in f:
+        if line[0] == '#':
+          self.comment += [line]
+          continue
+        if len(line.strip()) == 0:
+          self.comment += [line]
+          continue
+        header_match = HEADER_PATTERN.match(line)
+        if header_match:
+          condition = ParseCondition(header_match.group(1).strip())
+          self.CloseSection()
+          self.WriteComment()
+          self.OpenSection(condition)
+          continue
+        rule_match = RULE_PATTERN.match(line)
+        if rule_match:
+          self.OpenSection()
+          self.WriteComment()
+          path = rule_match.group(1).strip()
+          value_str = rule_match.group(2).strip()
+          comment = ""
+          if '#' in value_str:
+            pos = value_str.find('#')
+            comment = "  %s" % value_str[pos:].strip()
+            value_str = value_str[:pos].strip()
+          value = ParseCondition(value_str)
+          print >> self.out, ("%s'%s': [%s],%s" %
+                              (self.indent, path, value, comment))
+          continue
+        def_match = DEF_PATTERN.match(line)
+        if def_match:
+          # Custom definitions are deprecated.
+          continue
+        prefix_match = PREFIX_PATTERN.match(line)
+        if prefix_match:
+          continue
+        print "Malformed line: '%s'." % line
+    self.CloseSection()
+    self.CloseGlobal()
+    result = self.out.getvalue()
+    self.out.close()
+    return result
diff --git a/deps/v8/tools/testrunner/local/progress.py b/deps/v8/tools/testrunner/local/progress.py
new file mode 100644
index 0000000000..9075a954fa
--- /dev/null
+++ b/deps/v8/tools/testrunner/local/progress.py
@@ -0,0 +1,238 @@
+# Copyright 2012 the V8 project authors. All rights reserved.
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+#       notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+#       copyright notice, this list of conditions and the following
+#       disclaimer in the documentation and/or other materials provided
+#       with the distribution.
+#     * Neither the name of Google Inc. nor the names of its
+#       contributors may be used to endorse or promote products derived
+#       from this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+
+import sys
+import time
+
+def EscapeCommand(command):
+  parts = []
+  for part in command:
+    if ' ' in part:
+      # Escape spaces.  We may need to escape more characters for this
+      # to work properly.
+      parts.append('"%s"' % part)
+    else:
+      parts.append(part)
+  return " ".join(parts)
+
+
+class ProgressIndicator(object):
+
+  def __init__(self):
+    self.runner = None
+
+  def Starting(self):
+    pass
+
+  def Done(self):
+    pass
+
+  def AboutToRun(self, test):
+    pass
+
+  def HasRun(self, test):
+    pass
+
+  def PrintFailureHeader(self, test):
+    if test.suite.IsNegativeTest(test):
+      negative_marker = '[negative] '
+    else:
+      negative_marker = ''
+    print "=== %(label)s %(negative)s===" % {
+      'label': test.GetLabel(),
+      'negative': negative_marker
+    }
+
+
+class SimpleProgressIndicator(ProgressIndicator):
+  """Abstract base class for {Verbose,Dots}ProgressIndicator"""
+
+  def Starting(self):
+    print 'Running %i tests' % self.runner.total
+
+  def Done(self):
+    print
+    for failed in self.runner.failed:
+      self.PrintFailureHeader(failed)
+      if failed.output.stderr:
+        print "--- stderr ---"
+        print failed.output.stderr.strip()
+      if failed.output.stdout:
+        print "--- stdout ---"
+        print failed.output.stdout.strip()
+      print "Command: %s" % EscapeCommand(self.runner.GetCommand(failed))
+      if failed.output.HasCrashed():
+        print "--- CRASHED ---"
+      if failed.output.HasTimedOut():
+        print "--- TIMEOUT ---"
+    if len(self.runner.failed) == 0:
+      print "==="
+      print "=== All tests succeeded"
+      print "==="
+    else:
+      print
+      print "==="
+      print "=== %i tests failed" % len(self.runner.failed)
+      if self.runner.crashed > 0:
+        print "=== %i tests CRASHED" % self.runner.crashed
+      print "==="
+
+
+class VerboseProgressIndicator(SimpleProgressIndicator):
+
+  def AboutToRun(self, test):
+    print 'Starting %s...' % test.GetLabel()
+    sys.stdout.flush()
+
+  def HasRun(self, test):
+    if test.suite.HasUnexpectedOutput(test):
+      if test.output.HasCrashed():
+        outcome = 'CRASH'
+      else:
+        outcome = 'FAIL'
+    else:
+      outcome = 'pass'
+    print 'Done running %s: %s' % (test.GetLabel(), outcome)
+
+
+class DotsProgressIndicator(SimpleProgressIndicator):
+
+  def HasRun(self, test):
+    total = self.runner.succeeded + len(self.runner.failed)
+    if (total > 1) and (total % 50 == 1):
+      sys.stdout.write('\n')
+    if test.suite.HasUnexpectedOutput(test):
+      if test.output.HasCrashed():
+        sys.stdout.write('C')
+        sys.stdout.flush()
+      elif test.output.HasTimedOut():
+        sys.stdout.write('T')
+        sys.stdout.flush()
+      else:
+        sys.stdout.write('F')
+        sys.stdout.flush()
+    else:
+      sys.stdout.write('.')
+      sys.stdout.flush()
+
+
+class CompactProgressIndicator(ProgressIndicator):
+  """Abstract base class for {Color,Monochrome}ProgressIndicator"""
+
+  def __init__(self, templates):
+    super(CompactProgressIndicator, self).__init__()
+    self.templates = templates
+    self.last_status_length = 0
+    self.start_time = time.time()
+
+  def Done(self):
+    self.PrintProgress('Done')
+    print ""  # Line break.
+
+  def AboutToRun(self, test):
+    self.PrintProgress(test.GetLabel())
+
+  def HasRun(self, test):
+    if test.suite.HasUnexpectedOutput(test):
+      self.ClearLine(self.last_status_length)
+      self.PrintFailureHeader(test)
+      stdout = test.output.stdout.strip()
+      if len(stdout):
+        print self.templates['stdout'] % stdout
+      stderr = test.output.stderr.strip()
+      if len(stderr):
+        print self.templates['stderr'] % stderr
+      print "Command: %s" % EscapeCommand(self.runner.GetCommand(test))
+      if test.output.HasCrashed():
+        print "exit code: %d" % test.output.exit_code
+        print "--- CRASHED ---"
+      if test.output.HasTimedOut():
+        print "--- TIMEOUT ---"
+
+  def Truncate(self, string, length):
+    if length and (len(string) > (length - 3)):
+      return string[:(length - 3)] + "..."
+    else:
+      return string
+
+  def PrintProgress(self, name):
+    self.ClearLine(self.last_status_length)
+    elapsed = time.time() - self.start_time
+    status = self.templates['status_line'] % {
+      'passed': self.runner.succeeded,
+      'remaining': (((self.runner.total - self.runner.remaining) * 100) //
+                    self.runner.total),
+      'failed': len(self.runner.failed),
+      'test': name,
+      'mins': int(elapsed) / 60,
+      'secs': int(elapsed) % 60
+    }
+    status = self.Truncate(status, 78)
+    self.last_status_length = len(status)
+    print status,
+    sys.stdout.flush()
+
+
+class ColorProgressIndicator(CompactProgressIndicator):
+
+  def __init__(self):
+    templates = {
+      'status_line': ("[%(mins)02i:%(secs)02i|"
+                      "\033[34m%%%(remaining) 4d\033[0m|"
+                      "\033[32m+%(passed) 4d\033[0m|"
+                      "\033[31m-%(failed) 4d\033[0m]: %(test)s"),
+      'stdout': "\033[1m%s\033[0m",
+      'stderr': "\033[31m%s\033[0m",
+    }
+    super(ColorProgressIndicator, self).__init__(templates)
+
+  def ClearLine(self, last_line_length):
+    print "\033[1K\r",
+
+
+class MonochromeProgressIndicator(CompactProgressIndicator):
+
+  def __init__(self):
+    templates = {
+      'status_line': ("[%(mins)02i:%(secs)02i|%%%(remaining) 4d|"
+                      "+%(passed) 4d|-%(failed) 4d]: %(test)s"),
+      'stdout': '%s',
+      'stderr': '%s',
+    }
+    super(MonochromeProgressIndicator, self).__init__(templates)
+
+  def ClearLine(self, last_line_length):
+    print ("\r" + (" " * last_line_length) + "\r"),
+
+
+PROGRESS_INDICATORS = {
+  'verbose': VerboseProgressIndicator,
+  'dots': DotsProgressIndicator,
+  'color': ColorProgressIndicator,
+  'mono': MonochromeProgressIndicator
+}
diff --git a/deps/v8/tools/testrunner/local/statusfile.py b/deps/v8/tools/testrunner/local/statusfile.py
new file mode 100644
index 0000000000..bf1de45f66
--- /dev/null
+++ b/deps/v8/tools/testrunner/local/statusfile.py
@@ -0,0 +1,145 @@
+# Copyright 2012 the V8 project authors. All rights reserved.
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+#       notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+#       copyright notice, this list of conditions and the following
+#       disclaimer in the documentation and/or other materials provided
+#       with the distribution.
+#     * Neither the name of Google Inc. nor the names of its
+#       contributors may be used to endorse or promote products derived
+#       from this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+
+# These imports are required for the on-demand conversion from
+# old to new status file format.
+from os.path import exists
+from os.path import getmtime
+
+from . import old_statusfile
+
+
+# These outcomes can occur in a TestCase's outcomes list:
+SKIP = "SKIP"
+FAIL = "FAIL"
+PASS = "PASS"
+OKAY = "OKAY"
+TIMEOUT = "TIMEOUT"
+CRASH = "CRASH"
+SLOW = "SLOW"
+# These are just for the status files and are mapped below in DEFS:
+FAIL_OK = "FAIL_OK"
+PASS_OR_FAIL = "PASS_OR_FAIL"
+
+ALWAYS = "ALWAYS"
+
+KEYWORDS = {}
+for key in [SKIP, FAIL, PASS, OKAY, TIMEOUT, CRASH, SLOW, FAIL_OK,
+            PASS_OR_FAIL, ALWAYS]:
+  KEYWORDS[key] = key
+
+DEFS = {FAIL_OK: [FAIL, OKAY],
+        PASS_OR_FAIL: [PASS, FAIL]}
+
+# Support arches, modes to be written as keywords instead of strings.
+VARIABLES = {ALWAYS: True}
+for var in ["debug", "release", "android_arm", "android_ia32", "arm", "ia32",
+            "mipsel", "x64"]:
+  VARIABLES[var] = var
+
+
+def DoSkip(outcomes):
+  return SKIP in outcomes or SLOW in outcomes
+
+
+def IsFlaky(outcomes):
+  return ((PASS in outcomes) and (FAIL in outcomes) and
+          (not CRASH in outcomes) and (not OKAY in outcomes))
+
+
+def IsFailOk(outcomes):
+    return (FAIL in outcomes) and (OKAY in outcomes)
+
+
+def _AddOutcome(result, new):
+  global DEFS
+  if new in DEFS:
+    mapped = DEFS[new]
+    if type(mapped) == list:
+      for m in mapped:
+        _AddOutcome(result, m)
+    elif type(mapped) == str:
+      _AddOutcome(result, mapped)
+  else:
+    result.add(new)
+
+
+def _ParseOutcomeList(rule, outcomes, target_dict, variables):
+  result = set([])
+  if type(outcomes) == str:
+   outcomes = [outcomes]
+  for item in outcomes:
+    if type(item) == str:
+      _AddOutcome(result, item)
+    elif type(item) == list:
+      if not eval(item[0], variables): continue
+      for outcome in item[1:]:
+        assert type(outcome) == str
+        _AddOutcome(result, outcome)
+    else:
+      assert False
+  if len(result) == 0: return
+  if rule in target_dict:
+    target_dict[rule] |= result
+  else:
+    target_dict[rule] = result
+
+
+def ReadStatusFile(path, variables):
+  # As long as the old-format .status files are authoritative, just
+  # create the converted version on demand and cache it to speed up
+  # subsequent runs.
+  if path.endswith(".status"):
+    newpath = path + "2"
+    if not exists(newpath) or getmtime(newpath) < getmtime(path):
+      print "Converting status file."
+      converted = old_statusfile.ConvertNotation(path).GetOutput()
+      with open(newpath, 'w') as f:
+        f.write(converted)
+    path = newpath
+
+  with open(path) as f:
+    global KEYWORDS
+    contents = eval(f.read(), KEYWORDS)
+
+  rules = {}
+  wildcards = {}
+  variables.update(VARIABLES)
+  for section in contents:
+    assert type(section) == list
+    assert len(section) == 2
+    if not eval(section[0], variables): continue
+    section = section[1]
+    assert type(section) == dict
+    for rule in section:
+      assert type(rule) == str
+      if rule[-1] == '*':
+        _ParseOutcomeList(rule, section[rule], wildcards, variables)
+      else:
+        _ParseOutcomeList(rule, section[rule], rules, variables)
+  return rules, wildcards
diff --git a/deps/v8/tools/testrunner/local/testsuite.py b/deps/v8/tools/testrunner/local/testsuite.py
new file mode 100644
index 0000000000..de5cddd115
--- /dev/null
+++ b/deps/v8/tools/testrunner/local/testsuite.py
@@ -0,0 +1,184 @@
+# Copyright 2012 the V8 project authors. All rights reserved.
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+#       notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+#       copyright notice, this list of conditions and the following
+#       disclaimer in the documentation and/or other materials provided
+#       with the distribution.
+#     * Neither the name of Google Inc. nor the names of its
+#       contributors may be used to endorse or promote products derived
+#       from this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+
+import imp
+import os
+
+from . import statusfile
+
+class TestSuite(object):
+
+  @staticmethod
+  def LoadTestSuite(root):
+    name = root.split(os.path.sep)[-1]
+    f = None
+    try:
+      (f, pathname, description) = imp.find_module("testcfg", [root])
+      module = imp.load_module("testcfg", f, pathname, description)
+      suite = module.GetSuite(name, root)
+    finally:
+      if f:
+        f.close()
+    return suite
+
+  def __init__(self, name, root):
+    self.name = name  # string
+    self.root = root  # string containing path
+    self.tests = None  # list of TestCase objects
+    self.rules = None  # dictionary mapping test path to list of outcomes
+    self.wildcards = None  # dictionary mapping test paths to list of outcomes
+    self.total_duration = None  # float, assigned on demand
+
+  def shell(self):
+    return "d8"
+
+  def suffix(self):
+    return ".js"
+
+  def status_file(self):
+    return "%s/%s.status" % (self.root, self.name)
+
+  # Used in the status file and for stdout printing.
+  def CommonTestName(self, testcase):
+    return testcase.path
+
+  def ListTests(self, context):
+    raise NotImplementedError
+
+  def VariantFlags(self):
+    return None
+
+  def DownloadData(self):
+    pass
+
+  def ReadStatusFile(self, variables):
+    (self.rules, self.wildcards) = \
+        statusfile.ReadStatusFile(self.status_file(), variables)
+
+  def ReadTestCases(self, context):
+    self.tests = self.ListTests(context)
+
+  def FilterTestCasesByStatus(self, warn_unused_rules):
+    filtered = []
+    used_rules = set()
+    for t in self.tests:
+      testname = self.CommonTestName(t)
+      if testname in self.rules:
+        used_rules.add(testname)
+        outcomes = self.rules[testname]
+        t.outcomes = outcomes  # Even for skipped tests, as the TestCase
+        # object stays around and PrintReport() uses it.
+        if statusfile.DoSkip(outcomes):
+          continue  # Don't add skipped tests to |filtered|.
+      if len(self.wildcards) != 0:
+        skip = False
+        for rule in self.wildcards:
+          assert rule[-1] == '*'
+          if testname.startswith(rule[:-1]):
+            used_rules.add(rule)
+            outcomes = self.wildcards[rule]
+            t.outcomes = outcomes
+            if statusfile.DoSkip(outcomes):
+              skip = True
+              break  # "for rule in self.wildcards"
+        if skip: continue  # "for t in self.tests"
+      filtered.append(t)
+    self.tests = filtered
+
+    if not warn_unused_rules:
+      return
+
+    for rule in self.rules:
+      if rule not in used_rules:
+        print("Unused rule: %s -> %s" % (rule, self.rules[rule]))
+    for rule in self.wildcards:
+      if rule not in used_rules:
+        print("Unused rule: %s -> %s" % (rule, self.wildcards[rule]))
+
+  def FilterTestCasesByArgs(self, args):
+    filtered = []
+    filtered_args = []
+    for a in args:
+      argpath = a.split(os.path.sep)
+      if argpath[0] != self.name:
+        continue
+      if len(argpath) == 1 or (len(argpath) == 2 and argpath[1] == '*'):
+        return  # Don't filter, run all tests in this suite.
+      path = os.path.sep.join(argpath[1:])
+      if path[-1] == '*':
+        path = path[:-1]
+      filtered_args.append(path)
+    for t in self.tests:
+      for a in filtered_args:
+        if t.path.startswith(a):
+          filtered.append(t)
+          break
+    self.tests = filtered
+
+  def GetFlagsForTestCase(self, testcase, context):
+    raise NotImplementedError
+
+  def GetSourceForTest(self, testcase):
+    return "(no source available)"
+
+  def IsFailureOutput(self, output, testpath):
+    return output.exit_code != 0
+
+  def IsNegativeTest(self, testcase):
+    return False
+
+  def HasFailed(self, testcase):
+    execution_failed = self.IsFailureOutput(testcase.output, testcase.path)
+    if self.IsNegativeTest(testcase):
+      return not execution_failed
+    else:
+      return execution_failed
+
+  def HasUnexpectedOutput(self, testcase):
+    if testcase.output.HasCrashed():
+      outcome = statusfile.CRASH
+    elif testcase.output.HasTimedOut():
+      outcome = statusfile.TIMEOUT
+    elif self.HasFailed(testcase):
+      outcome = statusfile.FAIL
+    else:
+      outcome = statusfile.PASS
+    if not testcase.outcomes:
+      return outcome != statusfile.PASS
+    return not outcome in testcase.outcomes
+
+  def StripOutputForTransmit(self, testcase):
+    if not self.HasUnexpectedOutput(testcase):
+      testcase.output.stdout = ""
+      testcase.output.stderr = ""
+
+  def CalculateTotalDuration(self):
+    self.total_duration = 0.0
+    for t in self.tests:
+      self.total_duration += t.duration
+    return self.total_duration
diff --git a/deps/v8/tools/testrunner/local/utils.py b/deps/v8/tools/testrunner/local/utils.py
new file mode 100644
index 0000000000..b7caa121f3
--- /dev/null
+++ b/deps/v8/tools/testrunner/local/utils.py
@@ -0,0 +1,108 @@
+# Copyright 2012 the V8 project authors. All rights reserved.
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+#       notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+#       copyright notice, this list of conditions and the following
+#       disclaimer in the documentation and/or other materials provided
+#       with the distribution.
+#     * Neither the name of Google Inc. nor the names of its
+#       contributors may be used to endorse or promote products derived
+#       from this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+
+import os
+from os.path import exists
+from os.path import isdir
+from os.path import join
+import platform
+import re
+
+
+def GetSuitePaths(test_root):
+  def IsSuite(path):
+    return isdir(path) and exists(join(path, 'testcfg.py'))
+  return [ f for f in os.listdir(test_root) if IsSuite(join(test_root, f)) ]
+
+
+# Reads a file into an array of strings
+def ReadLinesFrom(name):
+  lines = []
+  with open(name) as f:
+    for line in f:
+      if line.startswith('#'): continue
+      if '#' in line:
+        line = line[:line.find('#')]
+      line = line.strip()
+      if not line: continue
+      lines.append(line)
+  return lines
+
+
+def GuessOS():
+  system = platform.system()
+  if system == 'Linux':
+    return 'linux'
+  elif system == 'Darwin':
+    return 'macos'
+  elif system.find('CYGWIN') >= 0:
+    return 'cygwin'
+  elif system == 'Windows' or system == 'Microsoft':
+    # On Windows Vista platform.system() can return 'Microsoft' with some
+    # versions of Python, see http://bugs.python.org/issue1082
+    return 'win32'
+  elif system == 'FreeBSD':
+    return 'freebsd'
+  elif system == 'OpenBSD':
+    return 'openbsd'
+  elif system == 'SunOS':
+    return 'solaris'
+  elif system == 'NetBSD':
+    return 'netbsd'
+  else:
+    return None
+
+
+# This will default to building the 32 bit VM even on machines that are
+# capable of running the 64 bit VM.
+def DefaultArch():
+  machine = platform.machine()
+  machine = machine.lower()  # Windows 7 capitalizes 'AMD64'.
+  if machine.startswith('arm'):
+    return 'arm'
+  elif (not machine) or (not re.match('(x|i[3-6])86$', machine) is None):
+    return 'ia32'
+  elif machine == 'i86pc':
+    return 'ia32'
+  elif machine == 'x86_64':
+    return 'ia32'
+  elif machine == 'amd64':
+    return 'ia32'
+  else:
+    return None
+
+
+def GuessWordsize():
+  if '64' in platform.machine():
+    return '64'
+  else:
+    return '32'
+
+
+def IsWindows():
+  return GuessOS() == 'win32'
diff --git a/deps/v8/tools/testrunner/local/verbose.py b/deps/v8/tools/testrunner/local/verbose.py
new file mode 100644
index 0000000000..f693467523
--- /dev/null
+++ b/deps/v8/tools/testrunner/local/verbose.py
@@ -0,0 +1,99 @@
+# Copyright 2012 the V8 project authors. All rights reserved.
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+#       notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+#       copyright notice, this list of conditions and the following
+#       disclaimer in the documentation and/or other materials provided
+#       with the distribution.
+#     * Neither the name of Google Inc. nor the names of its
+#       contributors may be used to endorse or promote products derived
+#       from this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+
+import sys
+import time
+
+from . import statusfile
+
+
+REPORT_TEMPLATE = (
+"""Total: %(total)i tests
+ * %(skipped)4d tests will be skipped
+ * %(timeout)4d tests are expected to timeout sometimes
+ * %(nocrash)4d tests are expected to be flaky but not crash
+ * %(pass)4d tests are expected to pass
+ * %(fail_ok)4d tests are expected to fail that we won't fix
+ * %(fail)4d tests are expected to fail that we should fix""")
+
+
+def PrintReport(tests):
+  total = len(tests)
+  skipped = timeout = nocrash = passes = fail_ok = fail = 0
+  for t in tests:
+    if "outcomes" not in dir(t) or not t.outcomes:
+      passes += 1
+      continue
+    o = t.outcomes
+    if statusfile.DoSkip(o):
+      skipped += 1
+      continue
+    if statusfile.TIMEOUT in o: timeout += 1
+    if statusfile.IsFlaky(o): nocrash += 1
+    if list(o) == [statusfile.PASS]: passes += 1
+    if statusfile.IsFailOk(o): fail_ok += 1
+    if list(o) == [statusfile.FAIL]: fail += 1
+  print REPORT_TEMPLATE % {
+    "total": total,
+    "skipped": skipped,
+    "timeout": timeout,
+    "nocrash": nocrash,
+    "pass": passes,
+    "fail_ok": fail_ok,
+    "fail": fail
+  }
+
+
+def PrintTestSource(tests):
+  for test in tests:
+    suite = test.suite
+    source = suite.GetSourceForTest(test).strip()
+    if len(source) > 0:
+      print "--- begin source: %s/%s ---" % (suite.name, test.path)
+      print source
+      print "--- end source: %s/%s ---" % (suite.name, test.path)
+
+
+def FormatTime(d):
+  millis = round(d * 1000) % 1000
+  return time.strftime("%M:%S.", time.gmtime(d)) + ("%03i" % millis)
+
+
+def PrintTestDurations(suites, overall_time):
+    # Write the times to stderr to make it easy to separate from the
+    # test output.
+    print
+    sys.stderr.write("--- Total time: %s ---\n" % FormatTime(overall_time))
+    timed_tests = [ t for s in suites for t in s.tests
+                    if t.duration is not None ]
+    timed_tests.sort(lambda a, b: cmp(b.duration, a.duration))
+    index = 1
+    for entry in timed_tests[:20]:
+      t = FormatTime(entry.duration)
+      sys.stderr.write("%4i (%s) %s\n" % (index, t, entry.GetLabel()))
+      index += 1
diff --git a/deps/v8/tools/testrunner/network/__init__.py b/deps/v8/tools/testrunner/network/__init__.py
new file mode 100644
index 0000000000..202a262709
--- /dev/null
+++ b/deps/v8/tools/testrunner/network/__init__.py
@@ -0,0 +1,26 @@
+# Copyright 2012 the V8 project authors. All rights reserved.
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+#       notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+#       copyright notice, this list of conditions and the following
+#       disclaimer in the documentation and/or other materials provided
+#       with the distribution.
+#     * Neither the name of Google Inc. nor the names of its
+#       contributors may be used to endorse or promote products derived
+#       from this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/deps/v8/tools/testrunner/network/distro.py b/deps/v8/tools/testrunner/network/distro.py
new file mode 100644
index 0000000000..9d5a471d44
--- /dev/null
+++ b/deps/v8/tools/testrunner/network/distro.py
@@ -0,0 +1,90 @@
+# Copyright 2012 the V8 project authors. All rights reserved.
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+#       notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+#       copyright notice, this list of conditions and the following
+#       disclaimer in the documentation and/or other materials provided
+#       with the distribution.
+#     * Neither the name of Google Inc. nor the names of its
+#       contributors may be used to endorse or promote products derived
+#       from this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+
+class Shell(object):
+  def __init__(self, shell):
+    self.shell = shell
+    self.tests = []
+    self.total_duration = 0.0
+
+  def AddSuite(self, suite):
+    self.tests += suite.tests
+    self.total_duration += suite.total_duration
+
+  def SortTests(self):
+    self.tests.sort(cmp=lambda x, y: cmp(x.duration, y.duration))
+
+
+def Assign(suites, peers):
+  total_work = 0.0
+  for s in suites:
+    total_work += s.CalculateTotalDuration()
+
+  total_power = 0.0
+  for p in peers:
+    p.assigned_work = 0.0
+    total_power += p.jobs * p.relative_performance
+  for p in peers:
+    p.needed_work = total_work * p.jobs * p.relative_performance / total_power
+
+  shells = {}
+  for s in suites:
+    shell = s.shell()
+    if not shell in shells:
+      shells[shell] = Shell(shell)
+    shells[shell].AddSuite(s)
+  # Convert |shells| to list and sort it, shortest total_duration first.
+  shells = [ shells[s] for s in shells ]
+  shells.sort(cmp=lambda x, y: cmp(x.total_duration, y.total_duration))
+  # Sort tests within each shell, longest duration last (so it's
+  # pop()'ed first).
+  for s in shells: s.SortTests()
+  # Sort peers, least needed_work first.
+  peers.sort(cmp=lambda x, y: cmp(x.needed_work, y.needed_work))
+  index = 0
+  for shell in shells:
+    while len(shell.tests) > 0:
+      while peers[index].needed_work <= 0:
+        index += 1
+        if index == len(peers):
+          print("BIG FAT WARNING: Assigning tests to peers failed. "
+                "Remaining tests: %d. Going to slow mode." % len(shell.tests))
+          # Pick the least-busy peer. Sorting the list for each test
+          # is terribly slow, but this is just an emergency fallback anyway.
+          peers.sort(cmp=lambda x, y: cmp(x.needed_work, y.needed_work))
+          peers[0].ForceAddOneTest(shell.tests.pop(), shell)
+      # If the peer already has a shell assigned and would need this one
+      # and then yet another, try to avoid it.
+      peer = peers[index]
+      if (shell.total_duration < peer.needed_work and
+          len(peer.shells) > 0 and
+          index < len(peers) - 1 and
+          shell.total_duration <= peers[index + 1].needed_work):
+        peers[index + 1].AddTests(shell)
+      else:
+        peer.AddTests(shell)
diff --git a/deps/v8/tools/testrunner/network/endpoint.py b/deps/v8/tools/testrunner/network/endpoint.py
new file mode 100644
index 0000000000..5dc2b9f902
--- /dev/null
+++ b/deps/v8/tools/testrunner/network/endpoint.py
@@ -0,0 +1,124 @@
+# Copyright 2012 the V8 project authors. All rights reserved.
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+#       notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+#       copyright notice, this list of conditions and the following
+#       disclaimer in the documentation and/or other materials provided
+#       with the distribution.
+#     * Neither the name of Google Inc. nor the names of its
+#       contributors may be used to endorse or promote products derived
+#       from this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+
+import multiprocessing
+import os
+import Queue
+import threading
+import time
+
+from ..local import execution
+from ..local import progress
+from ..local import testsuite
+from ..local import utils
+from ..server import compression
+
+
+class EndpointProgress(progress.ProgressIndicator):
+  def __init__(self, sock, server, ctx):
+    super(EndpointProgress, self).__init__()
+    self.sock = sock
+    self.server = server
+    self.context = ctx
+    self.results_queue = []  # Accessors must synchronize themselves.
+    self.sender_lock = threading.Lock()
+    self.senderthread = threading.Thread(target=self._SenderThread)
+    self.senderthread.start()
+
+  def HasRun(self, test):
+    # The runners that call this have a lock anyway, so this is safe.
+    self.results_queue.append(test)
+
+  def _SenderThread(self):
+    keep_running = True
+    tests = []
+    self.sender_lock.acquire()
+    while keep_running:
+      time.sleep(0.1)
+      # This should be "atomic enough" without locking :-)
+      # (We don't care which list any new elements get appended to, as long
+      # as we don't lose any and the last one comes last.)
+      current = self.results_queue
+      self.results_queue = []
+      for c in current:
+        if c is None:
+          keep_running = False
+        else:
+          tests.append(c)
+      if keep_running and len(tests) < 1:
+        continue  # Wait for more results.
+      if len(tests) < 1: break  # We're done here.
+      result = []
+      for t in tests:
+        result.append(t.PackResult())
+      try:
+        compression.Send(result, self.sock)
+      except:
+        self.runner.terminate = True
+      for t in tests:
+        self.server.CompareOwnPerf(t, self.context.arch, self.context.mode)
+      tests = []
+    self.sender_lock.release()
+
+
+def Execute(workspace, ctx, tests, sock, server):
+  suite_paths = utils.GetSuitePaths(os.path.join(workspace, "test"))
+  suites = []
+  for root in suite_paths:
+    suite = testsuite.TestSuite.LoadTestSuite(
+        os.path.join(workspace, "test", root))
+    if suite:
+      suites.append(suite)
+
+  suites_dict = {}
+  for s in suites:
+    suites_dict[s.name] = s
+    s.tests = []
+  for t in tests:
+    suite = suites_dict[t.suite]
+    t.suite = suite
+    suite.tests.append(t)
+
+  suites = [ s for s in suites if len(s.tests) > 0 ]
+  for s in suites:
+    s.DownloadData()
+
+  progress_indicator = EndpointProgress(sock, server, ctx)
+  runner = execution.Runner(suites, progress_indicator, ctx)
+  try:
+    runner.Run(server.jobs)
+  except IOError, e:
+    if e.errno == 2:
+      message = ("File not found: %s, maybe you forgot to 'git add' it?" %
+                 e.filename)
+    else:
+      message = "%s" % e
+    compression.Send([[-1, message]], sock)
+  progress_indicator.HasRun(None)  # Sentinel to signal the end.
+  progress_indicator.sender_lock.acquire()  # Released when sending is done.
+  progress_indicator.sender_lock.release()
diff --git a/deps/v8/tools/testrunner/network/network_execution.py b/deps/v8/tools/testrunner/network/network_execution.py
new file mode 100644
index 0000000000..ddb59e60b7
--- /dev/null
+++ b/deps/v8/tools/testrunner/network/network_execution.py
@@ -0,0 +1,253 @@
+# Copyright 2012 the V8 project authors. All rights reserved.
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+#       notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+#       copyright notice, this list of conditions and the following
+#       disclaimer in the documentation and/or other materials provided
+#       with the distribution.
+#     * Neither the name of Google Inc. nor the names of its
+#       contributors may be used to endorse or promote products derived
+#       from this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+
+import os
+import socket
+import subprocess
+import threading
+import time
+
+from . import distro
+from . import perfdata
+from ..local import execution
+from ..objects import peer
+from ..objects import workpacket
+from ..server import compression
+from ..server import constants
+from ..server import local_handler
+from ..server import signatures
+
+
+def GetPeers():
+  data = local_handler.LocalQuery([constants.REQUEST_PEERS])
+  if not data: return []
+  return [ peer.Peer.Unpack(p) for p in data ]
+
+
+class NetworkedRunner(execution.Runner):
+  def __init__(self, suites, progress_indicator, context, peers, workspace):
+    self.suites = suites
+    num_tests = 0
+    datapath = os.path.join("out", "testrunner_data")
+    self.perf_data_manager = perfdata.PerfDataManager(datapath)
+    self.perfdata = self.perf_data_manager.GetStore(context.arch, context.mode)
+    for s in suites:
+      for t in s.tests:
+        t.duration = self.perfdata.FetchPerfData(t) or 1.0
+      num_tests += len(s.tests)
+    self._CommonInit(num_tests, progress_indicator, context)
+    self.tests = []  # Only used if we need to fall back to local execution.
+    self.tests_lock = threading.Lock()
+    self.peers = peers
+    self.pubkey_fingerprint = None  # Fetched later.
+    self.base_rev = subprocess.check_output(
+        "cd %s; git log -1 --format=%%H --grep=git-svn-id" % workspace,
+        shell=True).strip()
+    self.base_svn_rev = subprocess.check_output(
+        "cd %s; git log -1 %s"          # Get commit description.
+        " | grep -e '^\s*git-svn-id:'"  # Extract "git-svn-id" line.
+        " | awk '{print $2}'"           # Extract "repository@revision" part.
+        " | sed -e 's/.*@//'" %         # Strip away "repository@".
+        (workspace, self.base_rev), shell=True).strip()
+    self.patch = subprocess.check_output(
+        "cd %s; git diff %s" % (workspace, self.base_rev), shell=True)
+    self.binaries = {}
+    self.initialization_lock = threading.Lock()
+    self.initialization_lock.acquire()  # Released when init is done.
+    self._OpenLocalConnection()
+    self.local_receiver_thread = threading.Thread(
+        target=self._ListenLocalConnection)
+    self.local_receiver_thread.daemon = True
+    self.local_receiver_thread.start()
+    self.initialization_lock.acquire()
+    self.initialization_lock.release()
+
+  def _OpenLocalConnection(self):
+    self.local_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+    code = self.local_socket.connect_ex(("localhost", constants.CLIENT_PORT))
+    if code != 0:
+      raise RuntimeError("Failed to connect to local server")
+    compression.Send([constants.REQUEST_PUBKEY_FINGERPRINT], self.local_socket)
+
+  def _ListenLocalConnection(self):
+    release_lock_countdown = 1  # Pubkey.
+    self.local_receiver = compression.Receiver(self.local_socket)
+    while not self.local_receiver.IsDone():
+      data = self.local_receiver.Current()
+      if data[0] == constants.REQUEST_PUBKEY_FINGERPRINT:
+        pubkey = data[1]
+        if not pubkey: raise RuntimeError("Received empty public key")
+        self.pubkey_fingerprint = pubkey
+        release_lock_countdown -= 1
+      if release_lock_countdown == 0:
+        self.initialization_lock.release()
+        release_lock_countdown -= 1  # Prevent repeated triggering.
+      self.local_receiver.Advance()
+
+  def Run(self, jobs):
+    self.indicator.Starting()
+    need_libv8 = False
+    for s in self.suites:
+      shell = s.shell()
+      if shell not in self.binaries:
+        path = os.path.join(self.context.shell_dir, shell)
+        # Check if this is a shared library build.
+        try:
+          ldd = subprocess.check_output("ldd %s | grep libv8\\.so" % (path),
+                                        shell=True)
+          ldd = ldd.strip().split(" ")
+          assert ldd[0] == "libv8.so"
+          assert ldd[1] == "=>"
+          need_libv8 = True
+          binary_needs_libv8 = True
+          libv8 = signatures.ReadFileAndSignature(ldd[2])
+        except:
+          binary_needs_libv8 = False
+        binary = signatures.ReadFileAndSignature(path)
+        if binary[0] is None:
+          print("Error: Failed to create signature.")
+          assert binary[1] != 0
+          return binary[1]
+        binary.append(binary_needs_libv8)
+        self.binaries[shell] = binary
+    if need_libv8:
+      self.binaries["libv8.so"] = libv8
+    distro.Assign(self.suites, self.peers)
+    # Spawn one thread for each peer.
+    threads = []
+    for p in self.peers:
+      thread = threading.Thread(target=self._TalkToPeer, args=[p])
+      threads.append(thread)
+      thread.start()
+    try:
+      for thread in threads:
+        # Use a timeout so that signals (Ctrl+C) will be processed.
+        thread.join(timeout=10000000)
+      self._AnalyzePeerRuntimes()
+    except KeyboardInterrupt:
+      self.terminate = True
+      raise
+    except Exception, _e:
+      # If there's an exception we schedule an interruption for any
+      # remaining threads...
+      self.terminate = True
+      # ...and then reraise the exception to bail out.
+      raise
+    compression.Send(constants.END_OF_STREAM, self.local_socket)
+    self.local_socket.close()
+    if self.tests:
+      self._RunInternal(jobs)
+    self.indicator.Done()
+    return not self.failed
+
+  def _TalkToPeer(self, peer):
+    sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+    sock.settimeout(self.context.timeout + 10)
+    code = sock.connect_ex((peer.address, constants.PEER_PORT))
+    if code == 0:
+      try:
+        peer.runtime = None
+        start_time = time.time()
+        packet = workpacket.WorkPacket(peer=peer, context=self.context,
+                                       base_revision=self.base_svn_rev,
+                                       patch=self.patch,
+                                       pubkey=self.pubkey_fingerprint)
+        data, test_map = packet.Pack(self.binaries)
+        compression.Send(data, sock)
+        compression.Send(constants.END_OF_STREAM, sock)
+        rec = compression.Receiver(sock)
+        while not rec.IsDone() and not self.terminate:
+          data_list = rec.Current()
+          for data in data_list:
+            test_id = data[0]
+            if test_id < 0:
+              # The peer is reporting an error.
+              with self.lock:
+                print("\nPeer %s reports error: %s" % (peer.address, data[1]))
+              continue
+            test = test_map.pop(test_id)
+            test.MergeResult(data)
+            try:
+              self.perfdata.UpdatePerfData(test)
+            except Exception, e:
+              print("UpdatePerfData exception: %s" % e)
+              pass  # Just keep working.
+            with self.lock:
+              perf_key = self.perfdata.GetKey(test)
+              compression.Send(
+                  [constants.INFORM_DURATION, perf_key, test.duration,
+                   self.context.arch, self.context.mode],
+                  self.local_socket)
+              self.indicator.AboutToRun(test)
+              if test.suite.HasUnexpectedOutput(test):
+                self.failed.append(test)
+                if test.output.HasCrashed():
+                  self.crashed += 1
+              else:
+                self.succeeded += 1
+              self.remaining -= 1
+              self.indicator.HasRun(test)
+          rec.Advance()
+        peer.runtime = time.time() - start_time
+      except KeyboardInterrupt:
+        sock.close()
+        raise
+      except Exception, e:
+        print("Got exception: %s" % e)
+        pass  # Fall back to local execution.
+    else:
+      compression.Send([constants.UNRESPONSIVE_PEER, peer.address],
+                       self.local_socket)
+    sock.close()
+    if len(test_map) > 0:
+      # Some tests have not received any results. Run them locally.
+      print("\nNo results for %d tests, running them locally." % len(test_map))
+      self._EnqueueLocally(test_map)
+
+  def _EnqueueLocally(self, test_map):
+    with self.tests_lock:
+      for test in test_map:
+        self.tests.append(test_map[test])
+
+  def _AnalyzePeerRuntimes(self):
+    total_runtime = 0.0
+    total_work = 0.0
+    for p in self.peers:
+      if p.runtime is None:
+        return
+      total_runtime += p.runtime
+      total_work += p.assigned_work
+    for p in self.peers:
+      p.assigned_work /= total_work
+      p.runtime /= total_runtime
+      perf_correction = p.assigned_work / p.runtime
+      old_perf = p.relative_performance
+      p.relative_performance = (old_perf + perf_correction) / 2.0
+      compression.Send([constants.UPDATE_PERF, p.address,
+                        p.relative_performance],
+                       self.local_socket)
diff --git a/deps/v8/tools/testrunner/network/perfdata.py b/deps/v8/tools/testrunner/network/perfdata.py
new file mode 100644
index 0000000000..2979dc4866
--- /dev/null
+++ b/deps/v8/tools/testrunner/network/perfdata.py
@@ -0,0 +1,120 @@
+# Copyright 2012 the V8 project authors. All rights reserved.
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+#       notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+#       copyright notice, this list of conditions and the following
+#       disclaimer in the documentation and/or other materials provided
+#       with the distribution.
+#     * Neither the name of Google Inc. nor the names of its
+#       contributors may be used to endorse or promote products derived
+#       from this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+
+import os
+import shelve
+import threading
+
+
+class PerfDataEntry(object):
+  def __init__(self):
+    self.avg = 0.0
+    self.count = 0
+
+  def AddResult(self, result):
+    kLearnRateLimiter = 99  # Greater value means slower learning.
+    # We use an approximation of the average of the last 100 results here:
+    # The existing average is weighted with kLearnRateLimiter (or less
+    # if there are fewer data points).
+    effective_count = min(self.count, kLearnRateLimiter)
+    self.avg = self.avg * effective_count + result
+    self.count = effective_count + 1
+    self.avg /= self.count
+
+
+class PerfDataStore(object):
+  def __init__(self, datadir, arch, mode):
+    filename = os.path.join(datadir, "%s.%s.perfdata" % (arch, mode))
+    self.database = shelve.open(filename, protocol=2)
+    self.closed = False
+    self.lock = threading.Lock()
+
+  def __del__(self):
+    self.close()
+
+  def close(self):
+    if self.closed: return
+    self.database.close()
+    self.closed = True
+
+  def GetKey(self, test):
+    """Computes the key used to access data for the given testcase."""
+    flags = "".join(test.flags)
+    return str("%s.%s.%s" % (test.suitename(), test.path, flags))
+
+  def FetchPerfData(self, test):
+    """Returns the observed duration for |test| as read from the store."""
+    key = self.GetKey(test)
+    if key in self.database:
+      return self.database[key].avg
+    return None
+
+  def UpdatePerfData(self, test):
+    """Updates the persisted value in the store with test.duration."""
+    testkey = self.GetKey(test)
+    self.RawUpdatePerfData(testkey, test.duration)
+
+  def RawUpdatePerfData(self, testkey, duration):
+    with self.lock:
+      if testkey in self.database:
+        entry = self.database[testkey]
+      else:
+        entry = PerfDataEntry()
+      entry.AddResult(duration)
+      self.database[testkey] = entry
+
+
+class PerfDataManager(object):
+  def __init__(self, datadir):
+    self.datadir = os.path.abspath(datadir)
+    if not os.path.exists(self.datadir):
+      os.makedirs(self.datadir)
+    self.stores = {}  # Keyed by arch, then mode.
+    self.closed = False
+    self.lock = threading.Lock()
+
+  def __del__(self):
+    self.close()
+
+  def close(self):
+    if self.closed: return
+    for arch in self.stores:
+      modes = self.stores[arch]
+      for mode in modes:
+        store = modes[mode]
+        store.close()
+    self.closed = True
+
+  def GetStore(self, arch, mode):
+    with self.lock:
+      if not arch in self.stores:
+        self.stores[arch] = {}
+      modes = self.stores[arch]
+      if not mode in modes:
+        modes[mode] = PerfDataStore(self.datadir, arch, mode)
+      return modes[mode]
diff --git a/deps/v8/tools/testrunner/objects/__init__.py b/deps/v8/tools/testrunner/objects/__init__.py
new file mode 100644
index 0000000000..202a262709
--- /dev/null
+++ b/deps/v8/tools/testrunner/objects/__init__.py
@@ -0,0 +1,26 @@
+# Copyright 2012 the V8 project authors. All rights reserved.
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+#       notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+#       copyright notice, this list of conditions and the following
+#       disclaimer in the documentation and/or other materials provided
+#       with the distribution.
+#     * Neither the name of Google Inc. nor the names of its
+#       contributors may be used to endorse or promote products derived
+#       from this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/deps/v8/tools/testrunner/objects/context.py b/deps/v8/tools/testrunner/objects/context.py
new file mode 100644
index 0000000000..b72284b648
--- /dev/null
+++ b/deps/v8/tools/testrunner/objects/context.py
@@ -0,0 +1,50 @@
+# Copyright 2012 the V8 project authors. All rights reserved.
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+#       notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+#       copyright notice, this list of conditions and the following
+#       disclaimer in the documentation and/or other materials provided
+#       with the distribution.
+#     * Neither the name of Google Inc. nor the names of its
+#       contributors may be used to endorse or promote products derived
+#       from this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+
+class Context():
+  def __init__(self, arch, mode, shell_dir, mode_flags, verbose, timeout,
+               isolates, command_prefix, extra_flags):
+    self.arch = arch
+    self.mode = mode
+    self.shell_dir = shell_dir
+    self.mode_flags = mode_flags
+    self.verbose = verbose
+    self.timeout = timeout
+    self.isolates = isolates
+    self.command_prefix = command_prefix
+    self.extra_flags = extra_flags
+
+  def Pack(self):
+    return [self.arch, self.mode, self.mode_flags, self.timeout, self.isolates,
+            self.extra_flags]
+
+  @staticmethod
+  def Unpack(packed):
+    # For the order of the fields, refer to Pack() above.
+    return Context(packed[0], packed[1], None, packed[2], False,
+                   packed[3], packed[4], "", packed[5])
diff --git a/deps/v8/tools/testrunner/objects/output.py b/deps/v8/tools/testrunner/objects/output.py
new file mode 100644
index 0000000000..87b4c84e19
--- /dev/null
+++ b/deps/v8/tools/testrunner/objects/output.py
@@ -0,0 +1,60 @@
+# Copyright 2012 the V8 project authors. All rights reserved.
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+#       notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+#       copyright notice, this list of conditions and the following
+#       disclaimer in the documentation and/or other materials provided
+#       with the distribution.
+#     * Neither the name of Google Inc. nor the names of its
+#       contributors may be used to endorse or promote products derived
+#       from this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+
+import signal
+
+from ..local import utils
+
+class Output(object):
+
+  def __init__(self, exit_code, timed_out, stdout, stderr):
+    self.exit_code = exit_code
+    self.timed_out = timed_out
+    self.stdout = stdout
+    self.stderr = stderr
+
+  def HasCrashed(self):
+    if utils.IsWindows():
+      return 0x80000000 & self.exit_code and not (0x3FFFFF00 & self.exit_code)
+    else:
+      # Timed out tests will have exit_code -signal.SIGTERM.
+      if self.timed_out:
+        return False
+      return (self.exit_code < 0 and
+              self.exit_code != -signal.SIGABRT)
+
+  def HasTimedOut(self):
+    return self.timed_out
+
+  def Pack(self):
+    return [self.exit_code, self.timed_out, self.stdout, self.stderr]
+
+  @staticmethod
+  def Unpack(packed):
+    # For the order of the fields, refer to Pack() above.
+    return Output(packed[0], packed[1], packed[2], packed[3])
diff --git a/deps/v8/tools/testrunner/objects/peer.py b/deps/v8/tools/testrunner/objects/peer.py
new file mode 100644
index 0000000000..18a6bec7a8
--- /dev/null
+++ b/deps/v8/tools/testrunner/objects/peer.py
@@ -0,0 +1,80 @@
+# Copyright 2012 the V8 project authors. All rights reserved.
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+#       notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+#       copyright notice, this list of conditions and the following
+#       disclaimer in the documentation and/or other materials provided
+#       with the distribution.
+#     * Neither the name of Google Inc. nor the names of its
+#       contributors may be used to endorse or promote products derived
+#       from this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+
+class Peer(object):
+  def __init__(self, address, jobs, rel_perf, pubkey):
+    self.address = address  # string: IP address
+    self.jobs = jobs  # integer: number of CPUs
+    self.relative_performance = rel_perf
+    self.pubkey = pubkey # string: pubkey's fingerprint
+    self.shells = set()  # set of strings
+    self.needed_work = 0
+    self.assigned_work = 0
+    self.tests = []  # list of TestCase objects
+    self.trusting_me = False  # This peer trusts my public key.
+    self.trusted = False  # I trust this peer's public key.
+
+  def __str__(self):
+    return ("Peer at %s, jobs: %d, performance: %.2f, trust I/O: %s/%s" %
+            (self.address, self.jobs, self.relative_performance,
+             self.trusting_me, self.trusted))
+
+  def AddTests(self, shell):
+    """Adds tests from |shell| to this peer.
+
+    Stops when self.needed_work reaches zero, or when all of shell's tests
+    are assigned."""
+    assert self.needed_work > 0
+    if shell.shell not in self.shells:
+      self.shells.add(shell.shell)
+    while len(shell.tests) > 0 and self.needed_work > 0:
+      t = shell.tests.pop()
+      self.needed_work -= t.duration
+      self.assigned_work += t.duration
+      shell.total_duration -= t.duration
+      self.tests.append(t)
+
+  def ForceAddOneTest(self, test, shell):
+    """Forcibly adds another test to this peer, disregarding needed_work."""
+    if shell.shell not in self.shells:
+      self.shells.add(shell.shell)
+    self.needed_work -= test.duration
+    self.assigned_work += test.duration
+    shell.total_duration -= test.duration
+    self.tests.append(test)
+
+
+  def Pack(self):
+    """Creates a JSON serializable representation of this Peer."""
+    return [self.address, self.jobs, self.relative_performance]
+
+  @staticmethod
+  def Unpack(packed):
+    """Creates a Peer object built from a packed representation."""
+    pubkey_dummy = ""  # Callers of this don't care (only the server does).
+    return Peer(packed[0], packed[1], packed[2], pubkey_dummy)
diff --git a/deps/v8/tools/testrunner/objects/testcase.py b/deps/v8/tools/testrunner/objects/testcase.py
new file mode 100644
index 0000000000..cfc522ea73
--- /dev/null
+++ b/deps/v8/tools/testrunner/objects/testcase.py
@@ -0,0 +1,83 @@
+# Copyright 2012 the V8 project authors. All rights reserved.
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+#       notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+#       copyright notice, this list of conditions and the following
+#       disclaimer in the documentation and/or other materials provided
+#       with the distribution.
+#     * Neither the name of Google Inc. nor the names of its
+#       contributors may be used to endorse or promote products derived
+#       from this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+
+from . import output
+
+class TestCase(object):
+  def __init__(self, suite, path, flags=[], dependency=None):
+    self.suite = suite  # TestSuite object
+    self.path = path    # string, e.g. 'div-mod', 'test-api/foo'
+    self.flags = flags  # list of strings, flags specific to this test case
+    self.dependency = dependency  # |path| for testcase that must be run first
+    self.outcomes = None
+    self.output = None
+    self.id = None  # int, used to map result back to TestCase instance
+    self.duration = None  # assigned during execution
+
+  def CopyAddingFlags(self, flags):
+    copy = TestCase(self.suite, self.path, self.flags + flags, self.dependency)
+    copy.outcomes = self.outcomes
+    return copy
+
+  def PackTask(self):
+    """
+    Extracts those parts of this object that are required to run the test
+    and returns them as a JSON serializable object.
+    """
+    assert self.id is not None
+    return [self.suitename(), self.path, self.flags,
+            self.dependency, list(self.outcomes or []), self.id]
+
+  @staticmethod
+  def UnpackTask(task):
+    """Creates a new TestCase object based on packed task data."""
+    # For the order of the fields, refer to PackTask() above.
+    test = TestCase(str(task[0]), task[1], task[2], task[3])
+    test.outcomes = set(task[4])
+    test.id = task[5]
+    return test
+
+  def SetSuiteObject(self, suites):
+    self.suite = suites[self.suite]
+
+  def PackResult(self):
+    """Serializes the output of the TestCase after it has run."""
+    self.suite.StripOutputForTransmit(self)
+    return [self.id, self.output.Pack(), self.duration]
+
+  def MergeResult(self, result):
+    """Applies the contents of a Result to this object."""
+    assert result[0] == self.id
+    self.output = output.Output.Unpack(result[1])
+    self.duration = result[2]
+
+  def suitename(self):
+    return self.suite.name
+
+  def GetLabel(self):
+    return self.suitename() + "/" + self.suite.CommonTestName(self)
diff --git a/deps/v8/tools/testrunner/objects/workpacket.py b/deps/v8/tools/testrunner/objects/workpacket.py
new file mode 100644
index 0000000000..d07efe76ec
--- /dev/null
+++ b/deps/v8/tools/testrunner/objects/workpacket.py
@@ -0,0 +1,90 @@
+# Copyright 2012 the V8 project authors. All rights reserved.
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+#       notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+#       copyright notice, this list of conditions and the following
+#       disclaimer in the documentation and/or other materials provided
+#       with the distribution.
+#     * Neither the name of Google Inc. nor the names of its
+#       contributors may be used to endorse or promote products derived
+#       from this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+
+from . import context
+from . import testcase
+
+class WorkPacket(object):
+  def __init__(self, peer=None, context=None, tests=None, binaries=None,
+               base_revision=None, patch=None, pubkey=None):
+    self.peer = peer
+    self.context = context
+    self.tests = tests
+    self.binaries = binaries
+    self.base_revision = base_revision
+    self.patch = patch
+    self.pubkey_fingerprint = pubkey
+
+  def Pack(self, binaries_dict):
+    """
+    Creates a JSON serializable object containing the data of this
+    work packet.
+    """
+    need_libv8 = False
+    binaries = []
+    for shell in self.peer.shells:
+      prefetched_binary = binaries_dict[shell]
+      binaries.append({"name": shell,
+                       "blob": prefetched_binary[0],
+                       "sign": prefetched_binary[1]})
+      if prefetched_binary[2]:
+        need_libv8 = True
+    if need_libv8:
+      libv8 = binaries_dict["libv8.so"]
+      binaries.append({"name": "libv8.so",
+                       "blob": libv8[0],
+                       "sign": libv8[1]})
+    tests = []
+    test_map = {}
+    for t in self.peer.tests:
+      test_map[t.id] = t
+      tests.append(t.PackTask())
+    result = {
+      "binaries": binaries,
+      "pubkey": self.pubkey_fingerprint,
+      "context": self.context.Pack(),
+      "base_revision": self.base_revision,
+      "patch": self.patch,
+      "tests": tests
+    }
+    return result, test_map
+
+  @staticmethod
+  def Unpack(packed):
+    """
+    Creates a WorkPacket object from the given packed representation.
+    """
+    binaries = packed["binaries"]
+    pubkey_fingerprint = packed["pubkey"]
+    ctx = context.Context.Unpack(packed["context"])
+    base_revision = packed["base_revision"]
+    patch = packed["patch"]
+    tests = [ testcase.TestCase.UnpackTask(t) for t in packed["tests"] ]
+    return WorkPacket(context=ctx, tests=tests, binaries=binaries,
+                      base_revision=base_revision, patch=patch,
+                      pubkey=pubkey_fingerprint)
diff --git a/deps/v8/tools/testrunner/server/__init__.py b/deps/v8/tools/testrunner/server/__init__.py
new file mode 100644
index 0000000000..202a262709
--- /dev/null
+++ b/deps/v8/tools/testrunner/server/__init__.py
@@ -0,0 +1,26 @@
+# Copyright 2012 the V8 project authors. All rights reserved.
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+#       notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+#       copyright notice, this list of conditions and the following
+#       disclaimer in the documentation and/or other materials provided
+#       with the distribution.
+#     * Neither the name of Google Inc. nor the names of its
+#       contributors may be used to endorse or promote products derived
+#       from this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/deps/v8/tools/testrunner/server/compression.py b/deps/v8/tools/testrunner/server/compression.py
new file mode 100644
index 0000000000..ce90c4f597
--- /dev/null
+++ b/deps/v8/tools/testrunner/server/compression.py
@@ -0,0 +1,112 @@
+# Copyright 2012 the V8 project authors. All rights reserved.
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+#       notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+#       copyright notice, this list of conditions and the following
+#       disclaimer in the documentation and/or other materials provided
+#       with the distribution.
+#     * Neither the name of Google Inc. nor the names of its
+#       contributors may be used to endorse or promote products derived
+#       from this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+
+import cStringIO as StringIO
+try:
+  import ujson as json
+except ImportError:
+  print("You should install UltraJSON, it is much faster!")
+  import json
+import os
+import struct
+import zlib
+
+from . import constants
+
+def Send(obj, sock):
+  """
+  Sends a JSON encodable object over the specified socket (zlib-compressed).
+  """
+  obj = json.dumps(obj)
+  compression_level = 2  # 1 = fastest, 9 = best compression
+  compressed = zlib.compress(obj, compression_level)
+  payload = struct.pack('>i', len(compressed)) + compressed
+  sock.sendall(payload)
+
+
+class Receiver(object):
+  def __init__(self, sock):
+    self.sock = sock
+    self.data = StringIO.StringIO()
+    self.datalength = 0
+    self._next = self._GetNext()
+
+  def IsDone(self):
+    return self._next == None
+
+  def Current(self):
+    return self._next
+
+  def Advance(self):
+    try:
+      self._next = self._GetNext()
+    except:
+      raise
+
+  def _GetNext(self):
+    try:
+      while self.datalength < constants.SIZE_T:
+        try:
+          chunk = self.sock.recv(8192)
+        except:
+          raise
+        if not chunk: return None
+        self._AppendData(chunk)
+      size = self._PopData(constants.SIZE_T)
+      size = struct.unpack(">i", size)[0]
+      while self.datalength < size:
+        try:
+          chunk = self.sock.recv(8192)
+        except:
+          raise
+        if not chunk: return None
+        self._AppendData(chunk)
+      result = self._PopData(size)
+      result = zlib.decompress(result)
+      result = json.loads(result)
+      if result == constants.END_OF_STREAM:
+        return None
+      return result
+    except:
+      raise
+
+  def _AppendData(self, new):
+    self.data.seek(0, os.SEEK_END)
+    self.data.write(new)
+    self.datalength += len(new)
+
+  def _PopData(self, length):
+    self.data.seek(0)
+    chunk = self.data.read(length)
+    remaining = self.data.read()
+    self.data.close()
+    self.data = StringIO.StringIO()
+    self.data.write(remaining)
+    assert self.datalength - length == len(remaining)
+    self.datalength = len(remaining)
+    return chunk
diff --git a/deps/v8/tools/testrunner/server/constants.py b/deps/v8/tools/testrunner/server/constants.py
new file mode 100644
index 0000000000..5aefcbad0d
--- /dev/null
+++ b/deps/v8/tools/testrunner/server/constants.py
@@ -0,0 +1,51 @@
+# Copyright 2012 the V8 project authors. All rights reserved.
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+#       notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+#       copyright notice, this list of conditions and the following
+#       disclaimer in the documentation and/or other materials provided
+#       with the distribution.
+#     * Neither the name of Google Inc. nor the names of its
+#       contributors may be used to endorse or promote products derived
+#       from this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+
+CLIENT_PORT = 9991  # Port for the local client to connect to.
+PEER_PORT = 9992  # Port for peers on the network to connect to.
+PRESENCE_PORT = 9993  # Port for presence daemon.
+STATUS_PORT = 9994  # Port for network requests not related to workpackets.
+
+END_OF_STREAM = "end of dtest stream"  # Marker for end of network requests.
+SIZE_T = 4  # Number of bytes used for network request size header.
+
+# Messages understood by the local request handler.
+ADD_TRUSTED = "add trusted"
+INFORM_DURATION = "inform about duration"
+REQUEST_PEERS = "get peers"
+UNRESPONSIVE_PEER = "unresponsive peer"
+REQUEST_PUBKEY_FINGERPRINT = "get pubkey fingerprint"
+REQUEST_STATUS = "get status"
+UPDATE_PERF = "update performance"
+
+# Messages understood by the status request handler.
+LIST_TRUSTED_PUBKEYS = "list trusted pubkeys"
+GET_SIGNED_PUBKEY = "pass on signed pubkey"
+NOTIFY_NEW_TRUSTED = "new trusted peer"
+TRUST_YOU_NOW = "trust you now"
+DO_YOU_TRUST = "do you trust"
diff --git a/deps/v8/tools/testrunner/server/daemon.py b/deps/v8/tools/testrunner/server/daemon.py
new file mode 100644
index 0000000000..baa66fbea9
--- /dev/null
+++ b/deps/v8/tools/testrunner/server/daemon.py
@@ -0,0 +1,147 @@
+#!/usr/bin/env python
+
+# This code has been written by Sander Marechal and published at:
+# http://www.jejik.com/articles/2007/02/a_simple_unix_linux_daemon_in_python/
+# where the author has placed it in the public domain (see comment #6 at
+# http://www.jejik.com/articles/2007/02/a_simple_unix_linux_daemon_in_python/#c6
+# ).
+# Some minor modifications have been made by the V8 authors. The work remains
+# in the public domain.
+
+import atexit
+import os
+from signal import SIGTERM
+from signal import SIGINT
+import sys
+import time
+
+
+class Daemon(object):
+  """
+  A generic daemon class.
+
+  Usage: subclass the Daemon class and override the run() method
+  """
+  def __init__(self, pidfile, stdin='/dev/null',
+               stdout='/dev/null', stderr='/dev/null'):
+    self.stdin = stdin
+    self.stdout = stdout
+    self.stderr = stderr
+    self.pidfile = pidfile
+
+  def daemonize(self):
+    """
+    do the UNIX double-fork magic, see Stevens' "Advanced
+    Programming in the UNIX Environment" for details (ISBN 0201563177)
+    http://www.erlenstar.demon.co.uk/unix/faq_2.html#SEC16
+    """
+    try:
+      pid = os.fork()
+      if pid > 0:
+        # exit first parent
+        sys.exit(0)
+    except OSError, e:
+      sys.stderr.write("fork #1 failed: %d (%s)\n" % (e.errno, e.strerror))
+      sys.exit(1)
+
+    # decouple from parent environment
+    os.chdir("/")
+    os.setsid()
+    os.umask(0)
+
+    # do second fork
+    try:
+      pid = os.fork()
+      if pid > 0:
+        # exit from second parent
+        sys.exit(0)
+    except OSError, e:
+      sys.stderr.write("fork #2 failed: %d (%s)\n" % (e.errno, e.strerror))
+      sys.exit(1)
+
+    # redirect standard file descriptors
+    sys.stdout.flush()
+    sys.stderr.flush()
+    si = file(self.stdin, 'r')
+    so = file(self.stdout, 'a+')
+    se = file(self.stderr, 'a+', 0)
+    # TODO: (debug) re-enable this!
+    #os.dup2(si.fileno(), sys.stdin.fileno())
+    #os.dup2(so.fileno(), sys.stdout.fileno())
+    #os.dup2(se.fileno(), sys.stderr.fileno())
+
+    # write pidfile
+    atexit.register(self.delpid)
+    pid = str(os.getpid())
+    file(self.pidfile, 'w+').write("%s\n" % pid)
+
+  def delpid(self):
+    os.remove(self.pidfile)
+
+  def start(self):
+    """
+    Start the daemon
+    """
+    # Check for a pidfile to see if the daemon already runs
+    try:
+      pf = file(self.pidfile, 'r')
+      pid = int(pf.read().strip())
+      pf.close()
+    except IOError:
+      pid = None
+
+    if pid:
+      message = "pidfile %s already exist. Daemon already running?\n"
+      sys.stderr.write(message % self.pidfile)
+      sys.exit(1)
+
+    # Start the daemon
+    self.daemonize()
+    self.run()
+
+  def stop(self):
+    """
+    Stop the daemon
+    """
+    # Get the pid from the pidfile
+    try:
+      pf = file(self.pidfile, 'r')
+      pid = int(pf.read().strip())
+      pf.close()
+    except IOError:
+      pid = None
+
+    if not pid:
+      message = "pidfile %s does not exist. Daemon not running?\n"
+      sys.stderr.write(message % self.pidfile)
+      return # not an error in a restart
+
+    # Try killing the daemon process
+    try:
+      # Give the process a one-second chance to exit gracefully.
+      os.kill(pid, SIGINT)
+      time.sleep(1)
+      while 1:
+        os.kill(pid, SIGTERM)
+        time.sleep(0.1)
+    except OSError, err:
+      err = str(err)
+      if err.find("No such process") > 0:
+        if os.path.exists(self.pidfile):
+          os.remove(self.pidfile)
+      else:
+        print str(err)
+        sys.exit(1)
+
+  def restart(self):
+    """
+    Restart the daemon
+    """
+    self.stop()
+    self.start()
+
+  def run(self):
+    """
+    You should override this method when you subclass Daemon. It will be
+    called after the process has been daemonized by start() or restart().
+    """
diff --git a/deps/v8/tools/testrunner/server/local_handler.py b/deps/v8/tools/testrunner/server/local_handler.py
new file mode 100644
index 0000000000..3b3ac495d0
--- /dev/null
+++ b/deps/v8/tools/testrunner/server/local_handler.py
@@ -0,0 +1,119 @@
+# Copyright 2012 the V8 project authors. All rights reserved.
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+#       notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+#       copyright notice, this list of conditions and the following
+#       disclaimer in the documentation and/or other materials provided
+#       with the distribution.
+#     * Neither the name of Google Inc. nor the names of its
+#       contributors may be used to endorse or promote products derived
+#       from this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+
+import socket
+import SocketServer
+import StringIO
+
+from . import compression
+from . import constants
+
+
+def LocalQuery(query):
+  sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+  code = sock.connect_ex(("localhost", constants.CLIENT_PORT))
+  if code != 0: return None
+  compression.Send(query, sock)
+  compression.Send(constants.END_OF_STREAM, sock)
+  rec = compression.Receiver(sock)
+  data = None
+  while not rec.IsDone():
+    data = rec.Current()
+    assert data[0] == query[0]
+    data = data[1]
+    rec.Advance()
+  sock.close()
+  return data
+
+
+class LocalHandler(SocketServer.BaseRequestHandler):
+  def handle(self):
+    rec = compression.Receiver(self.request)
+    while not rec.IsDone():
+      data = rec.Current()
+      action = data[0]
+
+      if action == constants.REQUEST_PEERS:
+        with self.server.daemon.peer_list_lock:
+          response = [ p.Pack() for p in self.server.daemon.peers
+                       if p.trusting_me ]
+        compression.Send([action, response], self.request)
+
+      elif action == constants.UNRESPONSIVE_PEER:
+        self.server.daemon.DeletePeer(data[1])
+
+      elif action == constants.REQUEST_PUBKEY_FINGERPRINT:
+        compression.Send([action, self.server.daemon.pubkey_fingerprint],
+                         self.request)
+
+      elif action == constants.REQUEST_STATUS:
+        compression.Send([action, self._GetStatusMessage()], self.request)
+
+      elif action == constants.ADD_TRUSTED:
+        fingerprint = self.server.daemon.CopyToTrusted(data[1])
+        compression.Send([action, fingerprint], self.request)
+
+      elif action == constants.INFORM_DURATION:
+        test_key = data[1]
+        test_duration = data[2]
+        arch = data[3]
+        mode = data[4]
+        self.server.daemon.AddPerfData(test_key, test_duration, arch, mode)
+
+      elif action == constants.UPDATE_PERF:
+        address = data[1]
+        perf = data[2]
+        self.server.daemon.UpdatePeerPerformance(data[1], data[2])
+
+      rec.Advance()
+    compression.Send(constants.END_OF_STREAM, self.request)
+
+  def _GetStatusMessage(self):
+    sio = StringIO.StringIO()
+    sio.write("Peers:\n")
+    with self.server.daemon.peer_list_lock:
+      for p in self.server.daemon.peers:
+        sio.write("%s\n" % p)
+    sio.write("My own jobs: %d, relative performance: %.2f\n" %
+              (self.server.daemon.jobs, self.server.daemon.relative_perf))
+    # Low-priority TODO: Return more information. Ideas:
+    #   - currently running anything,
+    #   - time since last job,
+    #   - time since last repository fetch
+    #   - number of workpackets/testcases handled since startup
+    #   - slowest test(s)
+    result = sio.getvalue()
+    sio.close()
+    return result
+
+
+class LocalSocketServer(SocketServer.ThreadingMixIn, SocketServer.TCPServer):
+  def __init__(self, daemon):
+    SocketServer.TCPServer.__init__(self, ("localhost", constants.CLIENT_PORT),
+                                    LocalHandler)
+    self.daemon = daemon
diff --git a/deps/v8/tools/testrunner/server/main.py b/deps/v8/tools/testrunner/server/main.py
new file mode 100644
index 0000000000..1000713ca9
--- /dev/null
+++ b/deps/v8/tools/testrunner/server/main.py
@@ -0,0 +1,245 @@
+# Copyright 2012 the V8 project authors. All rights reserved.
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+#       notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+#       copyright notice, this list of conditions and the following
+#       disclaimer in the documentation and/or other materials provided
+#       with the distribution.
+#     * Neither the name of Google Inc. nor the names of its
+#       contributors may be used to endorse or promote products derived
+#       from this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+
+import multiprocessing
+import os
+import shutil
+import subprocess
+import threading
+import time
+
+from . import daemon
+from . import local_handler
+from . import presence_handler
+from . import signatures
+from . import status_handler
+from . import work_handler
+from ..network import perfdata
+
+
+class Server(daemon.Daemon):
+
+  def __init__(self, pidfile, root, stdin="/dev/null",
+               stdout="/dev/null", stderr="/dev/null"):
+    super(Server, self).__init__(pidfile, stdin, stdout, stderr)
+    self.root = root
+    self.local_handler = None
+    self.local_handler_thread = None
+    self.work_handler = None
+    self.work_handler_thread = None
+    self.status_handler = None
+    self.status_handler_thread = None
+    self.presence_daemon = None
+    self.presence_daemon_thread = None
+    self.peers = []
+    self.jobs = multiprocessing.cpu_count()
+    self.peer_list_lock = threading.Lock()
+    self.perf_data_lock = None
+    self.presence_daemon_lock = None
+    self.datadir = os.path.join(self.root, "data")
+    pubkey_fingerprint_filename = os.path.join(self.datadir, "mypubkey")
+    with open(pubkey_fingerprint_filename) as f:
+      self.pubkey_fingerprint = f.read().strip()
+    self.relative_perf_filename = os.path.join(self.datadir, "myperf")
+    if os.path.exists(self.relative_perf_filename):
+      with open(self.relative_perf_filename) as f:
+        try:
+          self.relative_perf = float(f.read())
+        except:
+          self.relative_perf = 1.0
+    else:
+      self.relative_perf = 1.0
+
+  def run(self):
+    os.nice(20)
+    self.ip = presence_handler.GetOwnIP()
+    self.perf_data_manager = perfdata.PerfDataManager(self.datadir)
+    self.perf_data_lock = threading.Lock()
+
+    self.local_handler = local_handler.LocalSocketServer(self)
+    self.local_handler_thread = threading.Thread(
+        target=self.local_handler.serve_forever)
+    self.local_handler_thread.start()
+
+    self.work_handler = work_handler.WorkSocketServer(self)
+    self.work_handler_thread = threading.Thread(
+        target=self.work_handler.serve_forever)
+    self.work_handler_thread.start()
+
+    self.status_handler = status_handler.StatusSocketServer(self)
+    self.status_handler_thread = threading.Thread(
+        target=self.status_handler.serve_forever)
+    self.status_handler_thread.start()
+
+    self.presence_daemon = presence_handler.PresenceDaemon(self)
+    self.presence_daemon_thread = threading.Thread(
+        target=self.presence_daemon.serve_forever)
+    self.presence_daemon_thread.start()
+
+    self.presence_daemon.FindPeers()
+    time.sleep(0.5)  # Give those peers some time to reply.
+
+    with self.peer_list_lock:
+      for p in self.peers:
+        if p.address == self.ip: continue
+        status_handler.RequestTrustedPubkeys(p, self)
+
+    while True:
+      try:
+        self.PeriodicTasks()
+        time.sleep(60)
+      except Exception, e:
+        print("MAIN LOOP EXCEPTION: %s" % e)
+        self.Shutdown()
+        break
+      except KeyboardInterrupt:
+        self.Shutdown()
+        break
+
+  def Shutdown(self):
+    with open(self.relative_perf_filename, "w") as f:
+      f.write("%s" % self.relative_perf)
+    self.presence_daemon.shutdown()
+    self.presence_daemon.server_close()
+    self.local_handler.shutdown()
+    self.local_handler.server_close()
+    self.work_handler.shutdown()
+    self.work_handler.server_close()
+    self.status_handler.shutdown()
+    self.status_handler.server_close()
+
+  def PeriodicTasks(self):
+    # If we know peers we don't trust, see if someone else trusts them.
+    with self.peer_list_lock:
+      for p in self.peers:
+        if p.trusted: continue
+        if self.IsTrusted(p.pubkey):
+          p.trusted = True
+          status_handler.ITrustYouNow(p)
+          continue
+        for p2 in self.peers:
+          if not p2.trusted: continue
+          status_handler.TryTransitiveTrust(p2, p.pubkey, self)
+    # TODO: Ping for more peers waiting to be discovered.
+    # TODO: Update the checkout (if currently idle).
+
+  def AddPeer(self, peer):
+    with self.peer_list_lock:
+      for p in self.peers:
+        if p.address == peer.address:
+          return
+      self.peers.append(peer)
+    if peer.trusted:
+      status_handler.ITrustYouNow(peer)
+
+  def DeletePeer(self, peer_address):
+    with self.peer_list_lock:
+      for i in xrange(len(self.peers)):
+        if self.peers[i].address == peer_address:
+          del self.peers[i]
+          return
+
+  def MarkPeerAsTrusting(self, peer_address):
+    with self.peer_list_lock:
+      for p in self.peers:
+        if p.address == peer_address:
+          p.trusting_me = True
+          break
+
+  def UpdatePeerPerformance(self, peer_address, performance):
+    with self.peer_list_lock:
+      for p in self.peers:
+        if p.address == peer_address:
+          p.relative_performance = performance
+
+  def CopyToTrusted(self, pubkey_filename):
+    with open(pubkey_filename, "r") as f:
+      lines = f.readlines()
+      fingerprint = lines[-1].strip()
+    target_filename = self._PubkeyFilename(fingerprint)
+    shutil.copy(pubkey_filename, target_filename)
+    with self.peer_list_lock:
+      for peer in self.peers:
+        if peer.address == self.ip: continue
+        if peer.pubkey == fingerprint:
+          status_handler.ITrustYouNow(peer)
+        else:
+          result = self.SignTrusted(fingerprint)
+          status_handler.NotifyNewTrusted(peer, result)
+    return fingerprint
+
+  def _PubkeyFilename(self, pubkey_fingerprint):
+    return os.path.join(self.root, "trusted", "%s.pem" % pubkey_fingerprint)
+
+  def IsTrusted(self, pubkey_fingerprint):
+    return os.path.exists(self._PubkeyFilename(pubkey_fingerprint))
+
+  def ListTrusted(self):
+    path = os.path.join(self.root, "trusted")
+    if not os.path.exists(path): return []
+    return [ f[:-4] for f in os.listdir(path) if f.endswith(".pem") ]
+
+  def SignTrusted(self, pubkey_fingerprint):
+    if not self.IsTrusted(pubkey_fingerprint):
+      return []
+    filename = self._PubkeyFilename(pubkey_fingerprint)
+    result = signatures.ReadFileAndSignature(filename)  # Format: [key, sig].
+    return [pubkey_fingerprint, result[0], result[1], self.pubkey_fingerprint]
+
+  def AcceptNewTrusted(self, data):
+    # The format of |data| matches the return value of |SignTrusted()|.
+    if not data: return
+    fingerprint = data[0]
+    pubkey = data[1]
+    signature = data[2]
+    signer = data[3]
+    if not self.IsTrusted(signer):
+      return
+    if self.IsTrusted(fingerprint):
+      return  # Already trust this guy.
+    filename = self._PubkeyFilename(fingerprint)
+    signer_pubkeyfile = self._PubkeyFilename(signer)
+    if not signatures.VerifySignature(filename, pubkey, signature,
+                                      signer_pubkeyfile):
+      return
+    return  # Nothing more to do.
+
+  def AddPerfData(self, test_key, duration, arch, mode):
+    data_store = self.perf_data_manager.GetStore(arch, mode)
+    data_store.RawUpdatePerfData(str(test_key), duration)
+
+  def CompareOwnPerf(self, test, arch, mode):
+    data_store = self.perf_data_manager.GetStore(arch, mode)
+    observed = data_store.FetchPerfData(test)
+    if not observed: return
+    own_perf_estimate = observed / test.duration
+    with self.perf_data_lock:
+      kLearnRateLimiter = 9999
+      self.relative_perf *= kLearnRateLimiter
+      self.relative_perf += own_perf_estimate
+      self.relative_perf /= (kLearnRateLimiter + 1)
diff --git a/deps/v8/tools/testrunner/server/presence_handler.py b/deps/v8/tools/testrunner/server/presence_handler.py
new file mode 100644
index 0000000000..1dc2ef163a
--- /dev/null
+++ b/deps/v8/tools/testrunner/server/presence_handler.py
@@ -0,0 +1,120 @@
+# Copyright 2012 the V8 project authors. All rights reserved.
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+#       notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+#       copyright notice, this list of conditions and the following
+#       disclaimer in the documentation and/or other materials provided
+#       with the distribution.
+#     * Neither the name of Google Inc. nor the names of its
+#       contributors may be used to endorse or promote products derived
+#       from this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+
+import socket
+import SocketServer
+import threading
+try:
+  import ujson as json
+except:
+  import json
+
+from . import constants
+from ..objects import peer
+
+
+STARTUP_REQUEST = "V8 test peer starting up"
+STARTUP_RESPONSE = "Let's rock some tests!"
+EXIT_REQUEST = "V8 testing peer going down"
+
+
+def GetOwnIP():
+  s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
+  s.connect(("8.8.8.8", 80))
+  ip = s.getsockname()[0]
+  s.close()
+  return ip
+
+
+class PresenceHandler(SocketServer.BaseRequestHandler):
+
+  def handle(self):
+    data = json.loads(self.request[0].strip())
+
+    if data[0] == STARTUP_REQUEST:
+      jobs = data[1]
+      relative_perf = data[2]
+      pubkey_fingerprint = data[3]
+      trusted = self.server.daemon.IsTrusted(pubkey_fingerprint)
+      response = [STARTUP_RESPONSE, self.server.daemon.jobs,
+                  self.server.daemon.relative_perf,
+                  self.server.daemon.pubkey_fingerprint, trusted]
+      response = json.dumps(response)
+      self.server.SendTo(self.client_address[0], response)
+      p = peer.Peer(self.client_address[0], jobs, relative_perf,
+                    pubkey_fingerprint)
+      p.trusted = trusted
+      self.server.daemon.AddPeer(p)
+
+    elif data[0] == STARTUP_RESPONSE:
+      jobs = data[1]
+      perf = data[2]
+      pubkey_fingerprint = data[3]
+      p = peer.Peer(self.client_address[0], jobs, perf, pubkey_fingerprint)
+      p.trusted = self.server.daemon.IsTrusted(pubkey_fingerprint)
+      p.trusting_me = data[4]
+      self.server.daemon.AddPeer(p)
+
+    elif data[0] == EXIT_REQUEST:
+      self.server.daemon.DeletePeer(self.client_address[0])
+      if self.client_address[0] == self.server.daemon.ip:
+        self.server.shutdown_lock.release()
+
+
+class PresenceDaemon(SocketServer.ThreadingMixIn, SocketServer.UDPServer):
+  def __init__(self, daemon):
+    self.daemon = daemon
+    address = (daemon.ip, constants.PRESENCE_PORT)
+    SocketServer.UDPServer.__init__(self, address, PresenceHandler)
+    self.shutdown_lock = threading.Lock()
+
+  def shutdown(self):
+    self.shutdown_lock.acquire()
+    self.SendToAll(json.dumps([EXIT_REQUEST]))
+    self.shutdown_lock.acquire()
+    self.shutdown_lock.release()
+    SocketServer.UDPServer.shutdown(self)
+
+  def SendTo(self, target, message):
+    sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
+    sock.sendto(message, (target, constants.PRESENCE_PORT))
+    sock.close()
+
+  def SendToAll(self, message):
+    sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
+    ip = self.daemon.ip.split(".")
+    for i in range(1, 254):
+      ip[-1] = str(i)
+      sock.sendto(message, (".".join(ip), constants.PRESENCE_PORT))
+    sock.close()
+
+  def FindPeers(self):
+    request = [STARTUP_REQUEST, self.daemon.jobs, self.daemon.relative_perf,
+               self.daemon.pubkey_fingerprint]
+    request = json.dumps(request)
+    self.SendToAll(request)
diff --git a/deps/v8/tools/testrunner/server/signatures.py b/deps/v8/tools/testrunner/server/signatures.py
new file mode 100644
index 0000000000..9957a18a26
--- /dev/null
+++ b/deps/v8/tools/testrunner/server/signatures.py
@@ -0,0 +1,63 @@
+# Copyright 2012 the V8 project authors. All rights reserved.
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+#       notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+#       copyright notice, this list of conditions and the following
+#       disclaimer in the documentation and/or other materials provided
+#       with the distribution.
+#     * Neither the name of Google Inc. nor the names of its
+#       contributors may be used to endorse or promote products derived
+#       from this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+
+import base64
+import os
+import subprocess
+
+
+def ReadFileAndSignature(filename):
+  with open(filename, "rb") as f:
+    file_contents = base64.b64encode(f.read())
+  signature_file = filename + ".signature"
+  if (not os.path.exists(signature_file) or
+      os.path.getmtime(signature_file) < os.path.getmtime(filename)):
+    private_key = "~/.ssh/v8_dtest"
+    code = subprocess.call("openssl dgst -out %s -sign %s %s" %
+                           (signature_file, private_key, filename),
+                           shell=True)
+    if code != 0: return [None, code]
+  with open(signature_file) as f:
+    signature = base64.b64encode(f.read())
+  return [file_contents, signature]
+
+
+def VerifySignature(filename, file_contents, signature, pubkeyfile):
+  with open(filename, "wb") as f:
+    f.write(base64.b64decode(file_contents))
+  signature_file = filename + ".foreign_signature"
+  with open(signature_file, "wb") as f:
+    f.write(base64.b64decode(signature))
+  code = subprocess.call("openssl dgst -verify %s -signature %s %s" %
+                         (pubkeyfile, signature_file, filename),
+                         shell=True)
+  matched = (code == 0)
+  if not matched:
+    os.remove(signature_file)
+    os.remove(filename)
+  return matched
diff --git a/deps/v8/tools/testrunner/server/status_handler.py b/deps/v8/tools/testrunner/server/status_handler.py
new file mode 100644
index 0000000000..3f2271dc69
--- /dev/null
+++ b/deps/v8/tools/testrunner/server/status_handler.py
@@ -0,0 +1,112 @@
+# Copyright 2012 the V8 project authors. All rights reserved.
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+#       notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+#       copyright notice, this list of conditions and the following
+#       disclaimer in the documentation and/or other materials provided
+#       with the distribution.
+#     * Neither the name of Google Inc. nor the names of its
+#       contributors may be used to endorse or promote products derived
+#       from this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+
+import socket
+import SocketServer
+
+from . import compression
+from . import constants
+
+
+def _StatusQuery(peer, query):
+  sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+  code = sock.connect_ex((peer.address, constants.STATUS_PORT))
+  if code != 0:
+    # TODO(jkummerow): disconnect (after 3 failures?)
+    return
+  compression.Send(query, sock)
+  compression.Send(constants.END_OF_STREAM, sock)
+  rec = compression.Receiver(sock)
+  data = None
+  while not rec.IsDone():
+    data = rec.Current()
+    assert data[0] == query[0]
+    data = data[1]
+    rec.Advance()
+  sock.close()
+  return data
+
+
+def RequestTrustedPubkeys(peer, server):
+  pubkey_list = _StatusQuery(peer, [constants.LIST_TRUSTED_PUBKEYS])
+  for pubkey in pubkey_list:
+    if server.IsTrusted(pubkey): continue
+    result = _StatusQuery(peer, [constants.GET_SIGNED_PUBKEY, pubkey])
+    server.AcceptNewTrusted(result)
+
+
+def NotifyNewTrusted(peer, data):
+  _StatusQuery(peer, [constants.NOTIFY_NEW_TRUSTED] + data)
+
+
+def ITrustYouNow(peer):
+  _StatusQuery(peer, [constants.TRUST_YOU_NOW])
+
+
+def TryTransitiveTrust(peer, pubkey, server):
+  if _StatusQuery(peer, [constants.DO_YOU_TRUST, pubkey]):
+    result = _StatusQuery(peer, [constants.GET_SIGNED_PUBKEY, pubkey])
+    server.AcceptNewTrusted(result)
+
+
+class StatusHandler(SocketServer.BaseRequestHandler):
+  def handle(self):
+    rec = compression.Receiver(self.request)
+    while not rec.IsDone():
+      data = rec.Current()
+      action = data[0]
+
+      if action == constants.LIST_TRUSTED_PUBKEYS:
+        response = self.server.daemon.ListTrusted()
+        compression.Send([action, response], self.request)
+
+      elif action == constants.GET_SIGNED_PUBKEY:
+        response = self.server.daemon.SignTrusted(data[1])
+        compression.Send([action, response], self.request)
+
+      elif action == constants.NOTIFY_NEW_TRUSTED:
+        self.server.daemon.AcceptNewTrusted(data[1:])
+        pass  # No response.
+
+      elif action == constants.TRUST_YOU_NOW:
+        self.server.daemon.MarkPeerAsTrusting(self.client_address[0])
+        pass  # No response.
+
+      elif action == constants.DO_YOU_TRUST:
+        response = self.server.daemon.IsTrusted(data[1])
+        compression.Send([action, response], self.request)
+
+      rec.Advance()
+    compression.Send(constants.END_OF_STREAM, self.request)
+
+
+class StatusSocketServer(SocketServer.ThreadingMixIn, SocketServer.TCPServer):
+  def __init__(self, daemon):
+    address = (daemon.ip, constants.STATUS_PORT)
+    SocketServer.TCPServer.__init__(self, address, StatusHandler)
+    self.daemon = daemon
diff --git a/deps/v8/tools/testrunner/server/work_handler.py b/deps/v8/tools/testrunner/server/work_handler.py
new file mode 100644
index 0000000000..6bf7d43cf9
--- /dev/null
+++ b/deps/v8/tools/testrunner/server/work_handler.py
@@ -0,0 +1,150 @@
+# Copyright 2012 the V8 project authors. All rights reserved.
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+#       notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+#       copyright notice, this list of conditions and the following
+#       disclaimer in the documentation and/or other materials provided
+#       with the distribution.
+#     * Neither the name of Google Inc. nor the names of its
+#       contributors may be used to endorse or promote products derived
+#       from this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+
+import os
+import SocketServer
+import stat
+import subprocess
+import threading
+
+from . import compression
+from . import constants
+from . import signatures
+from ..network import endpoint
+from ..objects import workpacket
+
+
+class WorkHandler(SocketServer.BaseRequestHandler):
+
+  def handle(self):
+    rec = compression.Receiver(self.request)
+    while not rec.IsDone():
+      data = rec.Current()
+      with self.server.job_lock:
+        self._WorkOnWorkPacket(data)
+      rec.Advance()
+
+  def _WorkOnWorkPacket(self, data):
+    server_root = self.server.daemon.root
+    v8_root = os.path.join(server_root, "v8")
+    os.chdir(v8_root)
+    packet = workpacket.WorkPacket.Unpack(data)
+    self.ctx = packet.context
+    self.ctx.shell_dir = os.path.join("out",
+                                      "%s.%s" % (self.ctx.arch, self.ctx.mode))
+    if not os.path.isdir(self.ctx.shell_dir):
+      os.makedirs(self.ctx.shell_dir)
+    for binary in packet.binaries:
+      if not self._UnpackBinary(binary, packet.pubkey_fingerprint):
+        return
+
+    if not self._CheckoutRevision(packet.base_revision):
+      return
+
+    if not self._ApplyPatch(packet.patch):
+      return
+
+    tests = packet.tests
+    endpoint.Execute(v8_root, self.ctx, tests, self.request, self.server.daemon)
+    self._SendResponse()
+
+  def _SendResponse(self, error_message=None):
+    try:
+      if error_message:
+        compression.Send([[-1, error_message]], self.request)
+      compression.Send(constants.END_OF_STREAM, self.request)
+      return
+    except Exception, e:
+      pass  # Peer is gone. There's nothing we can do.
+    # Clean up.
+    self._Call("git checkout -f")
+    self._Call("git clean -f -d")
+    self._Call("rm -rf %s" % self.ctx.shell_dir)
+
+  def _UnpackBinary(self, binary, pubkey_fingerprint):
+    binary_name = binary["name"]
+    if binary_name == "libv8.so":
+      libdir = os.path.join(self.ctx.shell_dir, "lib.target")
+      if not os.path.exists(libdir): os.makedirs(libdir)
+      target = os.path.join(libdir, binary_name)
+    else:
+      target = os.path.join(self.ctx.shell_dir, binary_name)
+    pubkeyfile = "../trusted/%s.pem" % pubkey_fingerprint
+    if not signatures.VerifySignature(target, binary["blob"],
+                                      binary["sign"], pubkeyfile):
+      self._SendResponse("Signature verification failed")
+      return False
+    os.chmod(target, stat.S_IRWXU)
+    return True
+
+  def _CheckoutRevision(self, base_svn_revision):
+    get_hash_cmd = (
+        "git log -1 --format=%%H --remotes --grep='^git-svn-id:.*@%s'" %
+        base_svn_revision)
+    try:
+      base_revision = subprocess.check_output(get_hash_cmd, shell=True)
+      if not base_revision: raise ValueError
+    except:
+      self._Call("git fetch")
+      try:
+        base_revision = subprocess.check_output(get_hash_cmd, shell=True)
+        if not base_revision: raise ValueError
+      except:
+        self._SendResponse("Base revision not found.")
+        return False
+    code = self._Call("git checkout -f %s" % base_revision)
+    if code != 0:
+      self._SendResponse("Error trying to check out base revision.")
+      return False
+    code = self._Call("git clean -f -d")
+    if code != 0:
+      self._SendResponse("Failed to reset checkout")
+      return False
+    return True
+
+  def _ApplyPatch(self, patch):
+    if not patch: return True  # Just skip if the patch is empty.
+    patchfilename = "_dtest_incoming_patch.patch"
+    with open(patchfilename, "w") as f:
+      f.write(patch)
+    code = self._Call("git apply %s" % patchfilename)
+    if code != 0:
+      self._SendResponse("Error applying patch.")
+      return False
+    return True
+
+  def _Call(self, cmd):
+    return subprocess.call(cmd, shell=True)
+
+
+class WorkSocketServer(SocketServer.ThreadingMixIn, SocketServer.TCPServer):
+  def __init__(self, daemon):
+    address = (daemon.ip, constants.PEER_PORT)
+    SocketServer.TCPServer.__init__(self, address, WorkHandler)
+    self.job_lock = threading.Lock()
+    self.daemon = daemon
diff --git a/deps/v8/tools/tickprocessor.js b/deps/v8/tools/tickprocessor.js
index 4c4886d878..7530c6b37d 100644
--- a/deps/v8/tools/tickprocessor.js
+++ b/deps/v8/tools/tickprocessor.js
@@ -73,7 +73,7 @@ function parseState(s) {
 function SnapshotLogProcessor() {
   LogReader.call(this, {
       'code-creation': {
-          parsers: [null, parseInt, parseInt, null, 'var-args'],
+          parsers: [null, parseInt, parseInt, parseInt, null, 'var-args'],
           processor: this.processCodeCreation },
       'code-move': { parsers: [parseInt, parseInt],
           processor: this.processCodeMove },
@@ -107,7 +107,7 @@ inherits(SnapshotLogProcessor, LogReader);
 
 
 SnapshotLogProcessor.prototype.processCodeCreation = function(
-    type, start, size, name, maybe_func) {
+    type, kind, start, size, name, maybe_func) {
   if (maybe_func.length) {
     var funcAddr = parseInt(maybe_func[0]);
     var state = parseState(maybe_func[1]);
@@ -156,7 +156,7 @@ function TickProcessor(
       'shared-library': { parsers: [null, parseInt, parseInt],
           processor: this.processSharedLibrary },
       'code-creation': {
-          parsers: [null, parseInt, parseInt, null, 'var-args'],
+          parsers: [null, parseInt, parseInt, parseInt, null, 'var-args'],
           processor: this.processCodeCreation },
       'code-move': { parsers: [parseInt, parseInt],
           processor: this.processCodeMove },
@@ -167,7 +167,7 @@ function TickProcessor(
       'snapshot-pos': { parsers: [parseInt, parseInt],
           processor: this.processSnapshotPosition },
       'tick': {
-          parsers: [parseInt, parseInt, parseInt,
+          parsers: [parseInt, parseInt, parseInt, parseInt,
                     parseInt, parseInt, 'var-args'],
           processor: this.processTick },
       'heap-sample-begin': { parsers: [null, null, parseInt],
@@ -231,8 +231,9 @@ TickProcessor.VmStates = {
   JS: 0,
   GC: 1,
   COMPILER: 2,
-  OTHER: 3,
-  EXTERNAL: 4
+  PARALLEL_COMPILER: 3,
+  OTHER: 4,
+  EXTERNAL: 5
 };
 
 
@@ -308,7 +309,7 @@ TickProcessor.prototype.processSharedLibrary = function(
 
 
 TickProcessor.prototype.processCodeCreation = function(
-    type, start, size, name, maybe_func) {
+    type, kind, start, size, name, maybe_func) {
   name = this.deserializedEntriesNames_[start] || name;
   if (maybe_func.length) {
     var funcAddr = parseInt(maybe_func[0]);
@@ -349,6 +350,7 @@ TickProcessor.prototype.includeTick = function(vmState) {
 
 TickProcessor.prototype.processTick = function(pc,
                                                sp,
+                                               ns_since_start,
                                                is_external_callback,
                                                tos_or_external_callback,
                                                vmState,