Upgrade v8 to 1.3.5

110 files changed, 6193 insertions, 1307 deletions

diff --git a/deps/v8/ChangeLog b/deps/v8/ChangeLog
index 4bfd8d5ca9..c59661d366 100644
--- a/deps/v8/ChangeLog
+++ b/deps/v8/ChangeLog
@@ -1,3 +1,30 @@
+2009-08-19: Version 1.3.5
+
+        Optimize initialization of some arrays in the builtins.
+
+        Fix mac-nm script to support filenames with spaces.
+
+        Support for using the V8 profiler when V8 is embedded in a Windows DLL.
+
+        Changed typeof RegExp from 'object' to 'function' for compatibility.
+        Fixed bug where regexps were not callable across contexts.
+
+        Added context independent script compilation to the API.
+
+        Added API call to get the stack trace for an exception.
+
+        Added API for getting object mirrors.
+
+        Make sure that SSE3 instructions are used whenever possible even when
+        running off a snapshot generated without using SSE3 instructions.
+
+        Tweaked the handling of the initial size and growth policy of the heap.
+
+        Added native code generation for RegExp to 64-bit version.
+
+        Added JavaScript debugger support to 64-bit version.
+
+
 2009-08-13: Version 1.3.4
 
         Added a readline() command to the d8 shell.
diff --git a/deps/v8/SConstruct b/deps/v8/SConstruct
index c981ef9139..efd34dbade 100644
--- a/deps/v8/SConstruct
+++ b/deps/v8/SConstruct
@@ -101,6 +101,9 @@ LIBRARY_FLAGS = {
     'regexp:native': {
       'arch:ia32' : {
         'CPPDEFINES': ['V8_NATIVE_REGEXP']
+      },
+      'arch:x64' : {
+        'CPPDEFINES': ['V8_NATIVE_REGEXP']
       }
     }
   },
@@ -166,7 +169,7 @@ LIBRARY_FLAGS = {
     },
     'arch:x64': {
       'CPPDEFINES':   ['V8_TARGET_ARCH_X64'],
-      'CCFLAGS':      ['-fno-strict-aliasing', '-m64'],
+      'CCFLAGS':      ['-m64'],
       'LINKFLAGS':    ['-m64'],
     },
     'prof:oprofile': {
@@ -716,7 +719,11 @@ class BuildContext(object):
     result = []
     result += source.get('all', [])
     for (name, value) in self.options.iteritems():
-      result += source.get(name + ':' + value, [])
+      source_value = source.get(name + ':' + value, [])
+      if type(source_value) == dict:
+        result += self.GetRelevantSources(source_value)
+      else:
+        result += source_value
     return sorted(result)
 
   def AppendFlags(self, options, added):
diff --git a/deps/v8/include/v8-debug.h b/deps/v8/include/v8-debug.h
index 345d331a12..3c5c923b3d 100644
--- a/deps/v8/include/v8-debug.h
+++ b/deps/v8/include/v8-debug.h
@@ -228,9 +228,14 @@ class EXPORT Debug {
   *   }
   * \endcode
   */
-  static Handle<Value> Call(v8::Handle<v8::Function> fun,
+  static Local<Value> Call(v8::Handle<v8::Function> fun,
                             Handle<Value> data = Handle<Value>());
 
+  /**
+   * Returns a mirror object for the given object.
+   */
+  static Local<Value> GetMirror(v8::Handle<v8::Value> obj);
+
  /**
   * Enable the V8 builtin debug agent. The debugger agent will listen on the
   * supplied TCP/IP port for remote debugger connection.
diff --git a/deps/v8/include/v8.h b/deps/v8/include/v8.h
index d8de00ceca..a0cc4ea8b0 100644
--- a/deps/v8/include/v8.h
+++ b/deps/v8/include/v8.h
@@ -513,10 +513,36 @@ class V8EXPORT ScriptOrigin {
 class V8EXPORT Script {
  public:
 
+   /**
+    * Compiles the specified script. The ScriptOrigin* and ScriptData*
+    * parameters are owned by the caller of Script::Compile. No
+    * references to these objects are kept after compilation finishes.
+    *
+    * The script object returned is context independent; when run it
+    * will use the currently entered context.
+    */
+   static Local<Script> New(Handle<String> source,
+                            ScriptOrigin* origin = NULL,
+                            ScriptData* pre_data = NULL);
+
+   /**
+    * Compiles the specified script using the specified file name
+    * object (typically a string) as the script's origin.
+    *
+    * The script object returned is context independent; when run it
+    * will use the currently entered context.
+    */
+   static Local<Script> New(Handle<String> source,
+                            Handle<Value> file_name);
+
   /**
    * Compiles the specified script. The ScriptOrigin* and ScriptData*
    * parameters are owned by the caller of Script::Compile. No
    * references to these objects are kept after compilation finishes.
+   *
+   * The script object returned is bound to the context that was active
+   * when this function was called.  When run it will always use this
+   * context.
    */
   static Local<Script> Compile(Handle<String> source,
                                ScriptOrigin* origin = NULL,
@@ -525,12 +551,20 @@ class V8EXPORT Script {
   /**
    * Compiles the specified script using the specified file name
    * object (typically a string) as the script's origin.
+   *
+   * The script object returned is bound to the context that was active
+   * when this function was called.  When run it will always use this
+   * context.
    */
   static Local<Script> Compile(Handle<String> source,
                                Handle<Value> file_name);
 
   /**
-   * Runs the script returning the resulting value.
+   * Runs the script returning the resulting value.  If the script is
+   * context independent (created using ::New) it will be run in the
+   * currently entered context.  If it is context specific (created
+   * using ::Compile) it will be run in the context in which it was
+   * compiled.
    */
   Local<Value> Run();
 
@@ -2256,6 +2290,12 @@ class V8EXPORT TryCatch {
   Local<Value> Exception() const;
 
   /**
+   * Returns the .stack property of the thrown object.  If no .stack
+   * property is present an empty handle is returned.
+   */
+  Local<Value> StackTrace() const;
+
+  /**
    * Returns the message associated with this exception.  If there is
    * no message associated an empty handle is returned.
    *
diff --git a/deps/v8/src/SConscript b/deps/v8/src/SConscript
index a9669a1229..6a38c1a79e 100755
--- a/deps/v8/src/SConscript
+++ b/deps/v8/src/SConscript
@@ -63,24 +63,32 @@ SOURCES = {
     'arm/register-allocator-arm.cc', 'arm/stub-cache-arm.cc',
     'arm/virtual-frame-arm.cc'
   ],
-  'arch:ia32': [
-    'ia32/assembler-ia32.cc', 'ia32/builtins-ia32.cc', 'ia32/cfg-ia32.cc',
-    'ia32/codegen-ia32.cc', 'ia32/cpu-ia32.cc', 'ia32/disasm-ia32.cc',
-    'ia32/debug-ia32.cc', 'ia32/frames-ia32.cc', 'ia32/ic-ia32.cc',
-    'ia32/jump-target-ia32.cc', 'ia32/macro-assembler-ia32.cc',
-    'ia32/regexp-macro-assembler-ia32.cc',
-    'ia32/register-allocator-ia32.cc', 'ia32/stub-cache-ia32.cc',
-    'ia32/virtual-frame-ia32.cc'
-  ],
-  'arch:x64': [
-    'x64/assembler-x64.cc', 'x64/builtins-x64.cc', 'x64/cfg-x64.cc',
-    'x64/codegen-x64.cc', 'x64/cpu-x64.cc', 'x64/disasm-x64.cc',
-    'x64/debug-x64.cc', 'x64/frames-x64.cc', 'x64/ic-x64.cc',
-    'x64/jump-target-x64.cc', 'x64/macro-assembler-x64.cc',
-    # 'x64/regexp-macro-assembler-x64.cc',
-    'x64/register-allocator-x64.cc',
-    'x64/stub-cache-x64.cc', 'x64/virtual-frame-x64.cc'
-  ],
+  'arch:ia32': {
+    'all': [
+      'ia32/assembler-ia32.cc', 'ia32/builtins-ia32.cc', 'ia32/cfg-ia32.cc',
+      'ia32/codegen-ia32.cc', 'ia32/cpu-ia32.cc', 'ia32/disasm-ia32.cc',
+      'ia32/debug-ia32.cc', 'ia32/frames-ia32.cc', 'ia32/ic-ia32.cc',
+      'ia32/jump-target-ia32.cc', 'ia32/macro-assembler-ia32.cc',
+      'ia32/register-allocator-ia32.cc', 'ia32/stub-cache-ia32.cc',
+      'ia32/virtual-frame-ia32.cc'
+    ],
+    'regexp:native': [
+      'ia32/regexp-macro-assembler-ia32.cc',
+    ]
+  },
+  'arch:x64': {
+    'all': [
+      'x64/assembler-x64.cc', 'x64/builtins-x64.cc', 'x64/cfg-x64.cc',
+      'x64/codegen-x64.cc', 'x64/cpu-x64.cc', 'x64/disasm-x64.cc',
+      'x64/debug-x64.cc', 'x64/frames-x64.cc', 'x64/ic-x64.cc',
+      'x64/jump-target-x64.cc', 'x64/macro-assembler-x64.cc',
+      'x64/register-allocator-x64.cc',
+      'x64/stub-cache-x64.cc', 'x64/virtual-frame-x64.cc'
+    ],
+    'regexp:native': [
+      'x64/regexp-macro-assembler-x64.cc'
+    ]
+  },
   'simulator:arm': ['arm/simulator-arm.cc'],
   'os:freebsd': ['platform-freebsd.cc', 'platform-posix.cc'],
   'os:linux':   ['platform-linux.cc', 'platform-posix.cc'],
diff --git a/deps/v8/src/api.cc b/deps/v8/src/api.cc
index 0dc4fd7c7e..88cf2bcde0 100644
--- a/deps/v8/src/api.cc
+++ b/deps/v8/src/api.cc
@@ -1046,7 +1046,7 @@ void ObjectTemplate::SetInternalFieldCount(int value) {
 
 ScriptData* ScriptData::PreCompile(const char* input, int length) {
   unibrow::Utf8InputBuffer<> buf(input, length);
-  return i::PreParse(&buf, NULL);
+  return i::PreParse(i::Handle<i::String>(), &buf, NULL);
 }
 
 
@@ -1058,11 +1058,11 @@ ScriptData* ScriptData::New(unsigned* data, int length) {
 // --- S c r i p t ---
 
 
-Local<Script> Script::Compile(v8::Handle<String> source,
-                              v8::ScriptOrigin* origin,
-                              v8::ScriptData* script_data) {
-  ON_BAILOUT("v8::Script::Compile()", return Local<Script>());
-  LOG_API("Script::Compile");
+Local<Script> Script::New(v8::Handle<String> source,
+                          v8::ScriptOrigin* origin,
+                          v8::ScriptData* script_data) {
+  ON_BAILOUT("v8::Script::New()", return Local<Script>());
+  LOG_API("Script::New");
   ENTER_V8;
   i::Handle<i::String> str = Utils::OpenHandle(*source);
   i::Handle<i::Object> name_obj;
@@ -1096,6 +1096,27 @@ Local<Script> Script::Compile(v8::Handle<String> source,
                                                               pre_data);
   has_pending_exception = boilerplate.is_null();
   EXCEPTION_BAILOUT_CHECK(Local<Script>());
+  return Local<Script>(ToApi<Script>(boilerplate));
+}
+
+
+Local<Script> Script::New(v8::Handle<String> source,
+                          v8::Handle<Value> file_name) {
+  ScriptOrigin origin(file_name);
+  return New(source, &origin);
+}
+
+
+Local<Script> Script::Compile(v8::Handle<String> source,
+                              v8::ScriptOrigin* origin,
+                              v8::ScriptData* script_data) {
+  ON_BAILOUT("v8::Script::Compile()", return Local<Script>());
+  LOG_API("Script::Compile");
+  ENTER_V8;
+  Local<Script> generic = New(source, origin, script_data);
+  if (generic.IsEmpty())
+    return generic;
+  i::Handle<i::JSFunction> boilerplate = Utils::OpenHandle(*generic);
   i::Handle<i::JSFunction> result =
       i::Factory::NewFunctionFromBoilerplate(boilerplate,
                                              i::Top::global_context());
@@ -1118,6 +1139,10 @@ Local<Value> Script::Run() {
   {
     HandleScope scope;
     i::Handle<i::JSFunction> fun = Utils::OpenHandle(this);
+    if (fun->IsBoilerplate()) {
+      fun = i::Factory::NewFunctionFromBoilerplate(fun,
+                                                   i::Top::global_context());
+    }
     EXCEPTION_PREAMBLE();
     i::Handle<i::Object> receiver(i::Top::context()->global_proxy());
     i::Handle<i::Object> result =
@@ -1194,6 +1219,22 @@ v8::Local<Value> v8::TryCatch::Exception() const {
 }
 
 
+v8::Local<Value> v8::TryCatch::StackTrace() const {
+  if (HasCaught()) {
+    i::Object* raw_obj = reinterpret_cast<i::Object*>(exception_);
+    if (!raw_obj->IsJSObject()) return v8::Local<Value>();
+    v8::HandleScope scope;
+    i::Handle<i::JSObject> obj(i::JSObject::cast(raw_obj));
+    i::Handle<i::String> name = i::Factory::LookupAsciiSymbol("stack");
+    if (!obj->HasProperty(*name))
+      return v8::Local<Value>();
+    return scope.Close(v8::Utils::ToLocal(i::GetProperty(obj, name)));
+  } else {
+    return v8::Local<Value>();
+  }
+}
+
+
 v8::Local<v8::Message> v8::TryCatch::Message() const {
   if (HasCaught() && message_ != i::Smi::FromInt(0)) {
     i::Object* message = reinterpret_cast<i::Object*>(message_);
@@ -2593,8 +2634,13 @@ Persistent<Context> v8::Context::New(
   i::Handle<i::Context> env;
   {
     ENTER_V8;
+#if defined(ANDROID)
+    // On mobile device, full GC is expensive, leave it to the system to
+    // decide when should make a full GC.
+#else
     // Give the heap a chance to cleanup if we've disposed contexts.
     i::Heap::CollectAllGarbageIfContextDisposed();
+#endif
     v8::Handle<ObjectTemplate> proxy_template = global_template;
     i::Handle<i::FunctionTemplateInfo> proxy_constructor;
     i::Handle<i::FunctionTemplateInfo> global_constructor;
@@ -3549,10 +3595,10 @@ void Debug::SetHostDispatchHandler(HostDispatchHandler handler,
 }
 
 
-Handle<Value> Debug::Call(v8::Handle<v8::Function> fun,
-                          v8::Handle<v8::Value> data) {
-  if (!i::V8::IsRunning()) return Handle<Value>();
-  ON_BAILOUT("v8::Debug::Call()", return Handle<Value>());
+Local<Value> Debug::Call(v8::Handle<v8::Function> fun,
+                         v8::Handle<v8::Value> data) {
+  if (!i::V8::IsRunning()) return Local<Value>();
+  ON_BAILOUT("v8::Debug::Call()", return Local<Value>());
   ENTER_V8;
   i::Handle<i::Object> result;
   EXCEPTION_PREAMBLE();
@@ -3570,6 +3616,28 @@ Handle<Value> Debug::Call(v8::Handle<v8::Function> fun,
 }
 
 
+Local<Value> Debug::GetMirror(v8::Handle<v8::Value> obj) {
+  if (!i::V8::IsRunning()) return Local<Value>();
+  ON_BAILOUT("v8::Debug::GetMirror()", return Local<Value>());
+  ENTER_V8;
+  v8::HandleScope scope;
+  i::Debug::Load();
+  i::Handle<i::JSObject> debug(i::Debug::debug_context()->global());
+  i::Handle<i::String> name = i::Factory::LookupAsciiSymbol("MakeMirror");
+  i::Handle<i::Object> fun_obj = i::GetProperty(debug, name);
+  i::Handle<i::JSFunction> fun = i::Handle<i::JSFunction>::cast(fun_obj);
+  v8::Handle<v8::Function> v8_fun = Utils::ToLocal(fun);
+  const int kArgc = 1;
+  v8::Handle<v8::Value> argv[kArgc] = { obj };
+  EXCEPTION_PREAMBLE();
+  v8::Handle<v8::Value> result = v8_fun->Call(Utils::ToLocal(debug),
+                                              kArgc,
+                                              argv);
+  EXCEPTION_BAILOUT_CHECK(Local<Value>());
+  return scope.Close(result);
+}
+
+
 bool Debug::EnableAgent(const char* name, int port) {
   return i::Debugger::StartAgent(name, port);
 }
diff --git a/deps/v8/src/arm/assembler-arm.h b/deps/v8/src/arm/assembler-arm.h
index eeab4a72cc..b3ebb8be8b 100644
--- a/deps/v8/src/arm/assembler-arm.h
+++ b/deps/v8/src/arm/assembler-arm.h
@@ -430,7 +430,10 @@ class Assembler : public Malloced {
 
   // Distance between the instruction referring to the address of the call
   // target (ldr pc, [target addr in const pool]) and the return address
-  static const int kTargetAddrToReturnAddrDist = sizeof(Instr);
+  static const int kPatchReturnSequenceLength = sizeof(Instr);
+  // Distance between start of patched return sequence and the emitted address
+  // to jump to.
+  static const int kPatchReturnSequenceAddressOffset = 1;
 
 
   // ---------------------------------------------------------------------------
diff --git a/deps/v8/src/arm/builtins-arm.cc b/deps/v8/src/arm/builtins-arm.cc
index b5332ece4c..28524c80ad 100644
--- a/deps/v8/src/arm/builtins-arm.cc
+++ b/deps/v8/src/arm/builtins-arm.cc
@@ -39,7 +39,7 @@ namespace internal {
 
 
 void Builtins::Generate_Adaptor(MacroAssembler* masm, CFunctionId id) {
-  // TODO(1238487): Don't pass the function in a static variable.
+  // TODO(428): Don't pass the function in a static variable.
   __ mov(ip, Operand(ExternalReference::builtin_passed_function()));
   __ str(r1, MemOperand(ip, 0));
 
diff --git a/deps/v8/src/arm/codegen-arm.cc b/deps/v8/src/arm/codegen-arm.cc
index d3507ec0e3..40b0ac8160 100644
--- a/deps/v8/src/arm/codegen-arm.cc
+++ b/deps/v8/src/arm/codegen-arm.cc
@@ -5890,16 +5890,11 @@ void CEntryStub::GenerateBody(MacroAssembler* masm, bool is_debug_break) {
   Label throw_out_of_memory_exception;
   Label throw_normal_exception;
 
-  // Call into the runtime system. Collect garbage before the call if
-  // running with --gc-greedy set.
-  if (FLAG_gc_greedy) {
-    Failure* failure = Failure::RetryAfterGC(0);
-    __ mov(r0, Operand(reinterpret_cast<intptr_t>(failure)));
-  }
+  // Call into the runtime system.
   GenerateCore(masm, &throw_normal_exception,
                &throw_out_of_memory_exception,
                frame_type,
-               FLAG_gc_greedy,
+               false,
                false);
 
   // Do space-specific GC and retry runtime call.
diff --git a/deps/v8/src/arm/codegen-arm.h b/deps/v8/src/arm/codegen-arm.h
index 80d1d56ee2..70a7b27765 100644
--- a/deps/v8/src/arm/codegen-arm.h
+++ b/deps/v8/src/arm/codegen-arm.h
@@ -152,14 +152,9 @@ class CodeGenerator: public AstVisitor {
 #endif
 
   static void SetFunctionInfo(Handle<JSFunction> fun,
-                              int length,
-                              int function_token_position,
-                              int start_position,
-                              int end_position,
-                              bool is_expression,
+                              FunctionLiteral* lit,
                               bool is_toplevel,
-                              Handle<Script> script,
-                              Handle<String> inferred_name);
+                              Handle<Script> script);
 
   // Accessors
   MacroAssembler* masm() { return masm_; }
diff --git a/deps/v8/src/arm/macro-assembler-arm.cc b/deps/v8/src/arm/macro-assembler-arm.cc
index 875c91e964..4b02e2d688 100644
--- a/deps/v8/src/arm/macro-assembler-arm.cc
+++ b/deps/v8/src/arm/macro-assembler-arm.cc
@@ -132,7 +132,7 @@ void MacroAssembler::Call(intptr_t target, RelocInfo::Mode rmode,
   // and the target address of the call would be referenced by the first
   // instruction rather than the second one, which would make it harder to patch
   // (two instructions before the return address, instead of one).
-  ASSERT(kTargetAddrToReturnAddrDist == sizeof(Instr));
+  ASSERT(kPatchReturnSequenceLength == sizeof(Instr));
 }
 
 
diff --git a/deps/v8/src/assembler.h b/deps/v8/src/assembler.h
index 879ee5410a..1ddc8a31e8 100644
--- a/deps/v8/src/assembler.h
+++ b/deps/v8/src/assembler.h
@@ -216,6 +216,9 @@ class RelocInfo BASE_EMBEDDED {
 
   // Patch the code with a call.
   void PatchCodeWithCall(Address target, int guard_bytes);
+  // Check whether the current instruction is currently a call
+  // sequence (whether naturally or a return sequence overwritten
+  // to enter the debugger).
   INLINE(bool IsCallInstruction());
 
 #ifdef ENABLE_DISASSEMBLER
diff --git a/deps/v8/src/ast.h b/deps/v8/src/ast.h
index 3a309ac96a..ea83712137 100644
--- a/deps/v8/src/ast.h
+++ b/deps/v8/src/ast.h
@@ -111,6 +111,7 @@ AST_NODE_LIST(DEF_FORWARD_DECLARATION)
 // Typedef only introduced to avoid unreadable code.
 // Please do appreciate the required space in "> >".
 typedef ZoneList<Handle<String> > ZoneStringList;
+typedef ZoneList<Handle<Object> > ZoneObjectList;
 
 
 class AstNode: public ZoneObject {
@@ -1226,6 +1227,9 @@ class FunctionLiteral: public Expression {
                   int materialized_literal_count,
                   bool contains_array_literal,
                   int expected_property_count,
+                  bool has_only_this_property_assignments,
+                  bool has_only_simple_this_property_assignments,
+                  Handle<FixedArray> this_property_assignments,
                   int num_parameters,
                   int start_position,
                   int end_position,
@@ -1236,6 +1240,10 @@ class FunctionLiteral: public Expression {
         materialized_literal_count_(materialized_literal_count),
         contains_array_literal_(contains_array_literal),
         expected_property_count_(expected_property_count),
+        has_only_this_property_assignments_(has_only_this_property_assignments),
+        has_only_simple_this_property_assignments_(
+            has_only_simple_this_property_assignments),
+        this_property_assignments_(this_property_assignments),
         num_parameters_(num_parameters),
         start_position_(start_position),
         end_position_(end_position),
@@ -1265,6 +1273,15 @@ class FunctionLiteral: public Expression {
   int materialized_literal_count() { return materialized_literal_count_; }
   bool contains_array_literal() { return contains_array_literal_; }
   int expected_property_count() { return expected_property_count_; }
+  bool has_only_this_property_assignments() {
+      return has_only_this_property_assignments_;
+  }
+  bool has_only_simple_this_property_assignments() {
+      return has_only_simple_this_property_assignments_;
+  }
+  Handle<FixedArray> this_property_assignments() {
+      return this_property_assignments_;
+  }
   int num_parameters() { return num_parameters_; }
 
   bool AllowsLazyCompilation();
@@ -1291,6 +1308,9 @@ class FunctionLiteral: public Expression {
   int materialized_literal_count_;
   bool contains_array_literal_;
   int expected_property_count_;
+  bool has_only_this_property_assignments_;
+  bool has_only_simple_this_property_assignments_;
+  Handle<FixedArray> this_property_assignments_;
   int num_parameters_;
   int start_position_;
   int end_position_;
diff --git a/deps/v8/src/builtins.cc b/deps/v8/src/builtins.cc
index 1ea0245a72..dbd18f82a5 100644
--- a/deps/v8/src/builtins.cc
+++ b/deps/v8/src/builtins.cc
@@ -61,7 +61,7 @@ namespace internal {
 // ----------------------------------------------------------------------------
 
 
-// TODO(1238487): We should consider passing whether or not the
+// TODO(428): We should consider passing whether or not the
 // builtin was invoked as a constructor as part of the
 // arguments. Maybe we also want to pass the called function?
 #define BUILTIN(name)                                                   \
@@ -336,9 +336,7 @@ BUILTIN(HandleApiCall) {
   HandleScope scope;
   bool is_construct = CalledAsConstructor();
 
-  // TODO(1238487): This is not nice. We need to get rid of this
-  // kludgy behavior and start handling API calls in a more direct
-  // way - maybe compile specialized stubs lazily?.
+  // TODO(428): Remove use of static variable, handle API callbacks directly.
   Handle<JSFunction> function =
       Handle<JSFunction>(JSFunction::cast(Builtins::builtin_passed_function));
 
diff --git a/deps/v8/src/codegen.cc b/deps/v8/src/codegen.cc
index 7a4bb12ed0..8e516c0b04 100644
--- a/deps/v8/src/codegen.cc
+++ b/deps/v8/src/codegen.cc
@@ -243,23 +243,22 @@ bool CodeGenerator::ShouldGenerateLog(Expression* type) {
 // in the full script source. When counting characters in the script source the
 // the first character is number 0 (not 1).
 void CodeGenerator::SetFunctionInfo(Handle<JSFunction> fun,
-                                    int length,
-                                    int function_token_position,
-                                    int start_position,
-                                    int end_position,
-                                    bool is_expression,
+                                    FunctionLiteral* lit,
                                     bool is_toplevel,
-                                    Handle<Script> script,
-                                    Handle<String> inferred_name) {
-  fun->shared()->set_length(length);
-  fun->shared()->set_formal_parameter_count(length);
+                                    Handle<Script> script) {
+  fun->shared()->set_length(lit->num_parameters());
+  fun->shared()->set_formal_parameter_count(lit->num_parameters());
   fun->shared()->set_script(*script);
-  fun->shared()->set_function_token_position(function_token_position);
-  fun->shared()->set_start_position(start_position);
-  fun->shared()->set_end_position(end_position);
-  fun->shared()->set_is_expression(is_expression);
+  fun->shared()->set_function_token_position(lit->function_token_position());
+  fun->shared()->set_start_position(lit->start_position());
+  fun->shared()->set_end_position(lit->end_position());
+  fun->shared()->set_is_expression(lit->is_expression());
   fun->shared()->set_is_toplevel(is_toplevel);
-  fun->shared()->set_inferred_name(*inferred_name);
+  fun->shared()->set_inferred_name(*lit->inferred_name());
+  fun->shared()->SetThisPropertyAssignmentsInfo(
+      lit->has_only_this_property_assignments(),
+      lit->has_only_simple_this_property_assignments(),
+      *lit->this_property_assignments());
 }
 
 
@@ -317,11 +316,7 @@ Handle<JSFunction> CodeGenerator::BuildBoilerplate(FunctionLiteral* node) {
                                       node->materialized_literal_count(),
                                       node->contains_array_literal(),
                                       code);
-  CodeGenerator::SetFunctionInfo(function, node->num_parameters(),
-                                 node->function_token_position(),
-                                 node->start_position(), node->end_position(),
-                                 node->is_expression(), false, script_,
-                                 node->inferred_name());
+  CodeGenerator::SetFunctionInfo(function, node, false, script_);
 
 #ifdef ENABLE_DEBUGGER_SUPPORT
   // Notify debugger that a new function has been added.
diff --git a/deps/v8/src/compilation-cache.cc b/deps/v8/src/compilation-cache.cc
index ec5b39c2fb..8dd9ec16b2 100644
--- a/deps/v8/src/compilation-cache.cc
+++ b/deps/v8/src/compilation-cache.cc
@@ -290,7 +290,6 @@ void CompilationCacheScript::Put(Handle<String> source,
   HandleScope scope;
   ASSERT(boilerplate->IsBoilerplate());
   Handle<CompilationCacheTable> table = GetTable(0);
-  // TODO(X64): -fstrict-aliasing causes a problem with table.  Fix it.
   CALL_HEAP_FUNCTION_VOID(table->Put(*source, *boilerplate));
 }
 
diff --git a/deps/v8/src/compiler.cc b/deps/v8/src/compiler.cc
index 5607f29622..feff492404 100644
--- a/deps/v8/src/compiler.cc
+++ b/deps/v8/src/compiler.cc
@@ -219,11 +219,8 @@ static Handle<JSFunction> MakeFunction(bool is_global,
                                       lit->contains_array_literal(),
                                       code);
 
-  CodeGenerator::SetFunctionInfo(fun, lit->scope()->num_parameters(),
-                                 RelocInfo::kNoPosition,
-                                 lit->start_position(), lit->end_position(),
-                                 lit->is_expression(), true, script,
-                                 lit->inferred_name());
+  ASSERT_EQ(RelocInfo::kNoPosition, lit->function_token_position());
+  CodeGenerator::SetFunctionInfo(fun, lit, true, script);
 
   // Hint to the runtime system used when allocating space for initial
   // property space by setting the expected number of properties for
@@ -269,7 +266,7 @@ Handle<JSFunction> Compiler::Compile(Handle<String> source,
     if (pre_data == NULL && source_length >= FLAG_min_preparse_length) {
       Access<SafeStringInputBuffer> buf(&safe_string_input_buffer);
       buf->Reset(source.location());
-      pre_data = PreParse(buf.value(), extension);
+      pre_data = PreParse(source, buf.value(), extension);
     }
 
     // Create a script object describing the script to be compiled.
diff --git a/deps/v8/src/debug.cc b/deps/v8/src/debug.cc
index 18536f5c7a..f2a28148b1 100644
--- a/deps/v8/src/debug.cc
+++ b/deps/v8/src/debug.cc
@@ -1452,14 +1452,15 @@ 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::kTargetAddrToReturnAddrDist;
+  Address addr = frame->pc() - Assembler::kPatchReturnSequenceLength;
 
   // Check if the location is at JS exit.
   bool at_js_exit = false;
   RelocIterator it(debug_info->code());
   while (!it.done()) {
     if (RelocInfo::IsJSReturn(it.rinfo()->rmode())) {
-      at_js_exit = it.rinfo()->pc() == addr - 1;
+      at_js_exit = (it.rinfo()->pc() ==
+                        addr - Assembler::kPatchReturnSequenceAddressOffset);
     }
     it.next();
   }
@@ -1477,8 +1478,9 @@ void Debug::SetAfterBreakTarget(JavaScriptFrame* frame) {
       addr +=  original_code->instruction_start() - code->instruction_start();
     }
 
-    // Move one byte back to where the call instruction was placed.
-    thread_local_.after_break_target_ = addr - 1;
+    // Move back to where the call instruction sequence started.
+    thread_local_.after_break_target_ =
+        addr - Assembler::kPatchReturnSequenceAddressOffset;
   } else {
     // Check if there still is a debug break call at the target address. If the
     // break point has been removed it will have disappeared. If it have
diff --git a/deps/v8/src/debug.h b/deps/v8/src/debug.h
index 970dbbe5ce..5b0273aa22 100644
--- a/deps/v8/src/debug.h
+++ b/deps/v8/src/debug.h
@@ -238,7 +238,10 @@ class Debug {
   // Returns whether the operation succeeded.
   static bool EnsureDebugInfo(Handle<SharedFunctionInfo> shared);
 
+  // Returns true if the current stub call is patched to call the debugger.
   static bool IsDebugBreak(Address addr);
+  // Returns true if the current return statement has been patched to be
+  // a debugger breakpoint.
   static bool IsDebugBreakAtReturn(RelocInfo* rinfo);
 
   // Check whether a code stub with the specified major key is a possible break
@@ -366,6 +369,7 @@ class Debug {
 
   // The x64 JS return sequence is padded with int3 to make it large
   // enough to hold a call instruction when the debugger patches it.
+  static const int kX64CallInstructionLength = 13;
   static const int kX64JSReturnSequenceLength = 13;
 
   // Code generator routines.
diff --git a/deps/v8/src/execution.cc b/deps/v8/src/execution.cc
index 4ab6b61731..9080f5eaaa 100644
--- a/deps/v8/src/execution.cc
+++ b/deps/v8/src/execution.cc
@@ -174,12 +174,7 @@ Handle<Object> Execution::GetFunctionDelegate(Handle<Object> object) {
 
   // Regular expressions can be called as functions in both Firefox
   // and Safari so we allow it too.
-  bool is_regexp =
-      object->IsHeapObject() &&
-      (HeapObject::cast(*object)->map()->constructor() ==
-       *Top::regexp_function());
-
-  if (is_regexp) {
+  if (object->IsJSRegExp()) {
     Handle<String> exec = Factory::exec_symbol();
     return Handle<Object>(object->GetProperty(*exec));
   }
diff --git a/deps/v8/src/execution.h b/deps/v8/src/execution.h
index 126b172d21..fba696e72c 100644
--- a/deps/v8/src/execution.h
+++ b/deps/v8/src/execution.h
@@ -206,8 +206,13 @@ class StackGuard BASE_EMBEDDED {
   static void DisableInterrupts();
 
   static const uintptr_t kLimitSize = kPointerSize * 128 * KB;
+#ifdef V8_TARGET_ARCH_X64
+  static const uintptr_t kInterruptLimit = V8_UINT64_C(0xfffffffffffffffe);
+  static const uintptr_t kIllegalLimit = V8_UINT64_C(0xffffffffffffffff);
+#else
   static const uintptr_t kInterruptLimit = 0xfffffffe;
   static const uintptr_t kIllegalLimit = 0xffffffff;
+#endif
 
   class ThreadLocal {
    public:
diff --git a/deps/v8/src/factory.cc b/deps/v8/src/factory.cc
index 36554df732..bb6987bb8c 100644
--- a/deps/v8/src/factory.cc
+++ b/deps/v8/src/factory.cc
@@ -87,8 +87,10 @@ Handle<String> Factory::NewStringFromUtf8(Vector<const char> string,
 }
 
 
-Handle<String> Factory::NewStringFromTwoByte(Vector<const uc16> string) {
-  CALL_HEAP_FUNCTION(Heap::AllocateStringFromTwoByte(string), String);
+Handle<String> Factory::NewStringFromTwoByte(Vector<const uc16> string,
+                                             PretenureFlag pretenure) {
+  CALL_HEAP_FUNCTION(Heap::AllocateStringFromTwoByte(string, pretenure),
+                     String);
 }
 
 
diff --git a/deps/v8/src/factory.h b/deps/v8/src/factory.h
index 4db5d4e71b..ddf71dec7a 100644
--- a/deps/v8/src/factory.h
+++ b/deps/v8/src/factory.h
@@ -92,7 +92,8 @@ class Factory : public AllStatic {
       Vector<const char> str,
       PretenureFlag pretenure = NOT_TENURED);
 
-  static Handle<String> NewStringFromTwoByte(Vector<const uc16> str);
+  static Handle<String> NewStringFromTwoByte(Vector<const uc16> str,
+      PretenureFlag pretenure = NOT_TENURED);
 
   // Allocates and partially initializes a TwoByte String. The characters of
   // the string are uninitialized. Currently used in regexp code only, where
diff --git a/deps/v8/src/handles-inl.h b/deps/v8/src/handles-inl.h
index 6013c5b51e..8478bb5cd9 100644
--- a/deps/v8/src/handles-inl.h
+++ b/deps/v8/src/handles-inl.h
@@ -39,7 +39,7 @@ namespace internal {
 template<class T>
 Handle<T>::Handle(T* obj) {
   ASSERT(!obj->IsFailure());
-  location_ = reinterpret_cast<T**>(HandleScope::CreateHandle(obj));
+  location_ = HandleScope::CreateHandle(obj);
 }
 
 
diff --git a/deps/v8/src/handles.h b/deps/v8/src/handles.h
index ba2694f509..8c9cbebfd9 100644
--- a/deps/v8/src/handles.h
+++ b/deps/v8/src/handles.h
@@ -82,7 +82,7 @@ class Handle {
   }
 
   static Handle<T> null() { return Handle<T>(); }
-  bool is_null() {return location_ == NULL; }
+  bool is_null() { return location_ == NULL; }
 
   // Closes the given scope, but lets this handle escape. See
   // implementation in api.h.
@@ -119,15 +119,18 @@ class HandleScope {
   static int NumberOfHandles();
 
   // Creates a new handle with the given value.
-  static inline Object** CreateHandle(Object* value) {
-    void** result = current_.next;
-    if (result == current_.limit) result = Extend();
+  template <typename T>
+  static inline T** CreateHandle(T* value) {
+    void** cur = current_.next;
+    if (cur == current_.limit) cur = Extend();
     // Update the current next field, set the value in the created
     // handle, and return the result.
-    ASSERT(result < current_.limit);
-    current_.next = result + 1;
-    *reinterpret_cast<Object**>(result) = value;
-    return reinterpret_cast<Object**>(result);
+    ASSERT(cur < current_.limit);
+    current_.next = cur + 1;
+
+    T** result = reinterpret_cast<T**>(cur);
+    *result = value;
+    return result;
   }
 
  private:
diff --git a/deps/v8/src/heap.cc b/deps/v8/src/heap.cc
index f8d22a2e36..7d6e442b87 100644
--- a/deps/v8/src/heap.cc
+++ b/deps/v8/src/heap.cc
@@ -73,6 +73,10 @@ int Heap::amount_of_external_allocated_memory_at_last_global_gc_ = 0;
 int Heap::semispace_size_  = 512*KB;
 int Heap::old_generation_size_ = 128*MB;
 int Heap::initial_semispace_size_ = 128*KB;
+#elseif defined(V8_TARGET_ARCH_X64)
+int Heap::semispace_size_  = 8*MB;
+int Heap::old_generation_size_ = 1*GB;
+int Heap::initial_semispace_size_ = 1*MB;
 #else
 int Heap::semispace_size_  = 4*MB;
 int Heap::old_generation_size_ = 512*MB;
@@ -277,7 +281,9 @@ void Heap::GarbageCollectionPrologue() {
 int Heap::SizeOfObjects() {
   int total = 0;
   AllSpaces spaces;
-  while (Space* space = spaces.next()) total += space->Size();
+  while (Space* space = spaces.next()) {
+    total += space->Size();
+  }
   return total;
 }
 
@@ -1048,6 +1054,7 @@ Object* Heap::AllocateMap(InstanceType instance_type, int instance_size) {
   map->set_constructor(null_value());
   map->set_instance_size(instance_size);
   map->set_inobject_properties(0);
+  map->set_pre_allocated_property_fields(0);
   map->set_instance_descriptors(empty_descriptor_array());
   map->set_code_cache(empty_fixed_array());
   map->set_unused_property_fields(0);
@@ -1605,6 +1612,9 @@ Object* Heap::AllocateSharedFunctionInfo(Object* name) {
   share->set_start_position_and_type(0);
   share->set_debug_info(undefined_value());
   share->set_inferred_name(empty_string());
+  share->set_compiler_hints(0);
+  share->set_this_property_assignments_count(0);
+  share->set_this_property_assignments(undefined_value());
   return result;
 }
 
@@ -2044,16 +2054,10 @@ Object* Heap::AllocateArgumentsObject(Object* callee, int length) {
 Object* Heap::AllocateInitialMap(JSFunction* fun) {
   ASSERT(!fun->has_initial_map());
 
-  // First create a new map with the expected number of properties being
-  // allocated in-object.
-  int expected_nof_properties = fun->shared()->expected_nof_properties();
-  int instance_size = JSObject::kHeaderSize +
-                      expected_nof_properties * kPointerSize;
-  if (instance_size > JSObject::kMaxInstanceSize) {
-    instance_size = JSObject::kMaxInstanceSize;
-    expected_nof_properties = (instance_size - JSObject::kHeaderSize) /
-                              kPointerSize;
-  }
+  // First create a new map with the size and number of in-object properties
+  // suggested by the function.
+  int instance_size = fun->shared()->CalculateInstanceSize();
+  int in_object_properties = fun->shared()->CalculateInObjectProperties();
   Object* map_obj = Heap::AllocateMap(JS_OBJECT_TYPE, instance_size);
   if (map_obj->IsFailure()) return map_obj;
 
@@ -2066,9 +2070,33 @@ Object* Heap::AllocateInitialMap(JSFunction* fun) {
     if (prototype->IsFailure()) return prototype;
   }
   Map* map = Map::cast(map_obj);
-  map->set_inobject_properties(expected_nof_properties);
-  map->set_unused_property_fields(expected_nof_properties);
+  map->set_inobject_properties(in_object_properties);
+  map->set_unused_property_fields(in_object_properties);
   map->set_prototype(prototype);
+
+  // If the function has only simple this property assignments add field
+  // descriptors for these to the initial map as the object cannot be
+  // constructed without having these properties.
+  ASSERT(in_object_properties <= Map::kMaxPreAllocatedPropertyFields);
+  if (fun->shared()->has_only_this_property_assignments() &&
+      fun->shared()->this_property_assignments_count() > 0) {
+    int count = fun->shared()->this_property_assignments_count();
+    if (count > in_object_properties) {
+      count = in_object_properties;
+    }
+    DescriptorArray* descriptors = *Factory::NewDescriptorArray(count);
+    if (descriptors->IsFailure()) return descriptors;
+    for (int i = 0; i < count; i++) {
+      String* name = fun->shared()->GetThisPropertyAssignmentName(i);
+      ASSERT(name->IsSymbol());
+      FieldDescriptor field(name, i, NONE);
+      descriptors->Set(i, &field);
+    }
+    descriptors->Sort();
+    map->set_instance_descriptors(descriptors);
+    map->set_pre_allocated_property_fields(count);
+    map->set_unused_property_fields(in_object_properties - count);
+  }
   return map;
 }
 
@@ -2100,7 +2128,11 @@ Object* Heap::AllocateJSObjectFromMap(Map* map, PretenureFlag pretenure) {
   ASSERT(map->instance_type() != JS_BUILTINS_OBJECT_TYPE);
 
   // Allocate the backing storage for the properties.
-  int prop_size = map->unused_property_fields() - map->inobject_properties();
+  int prop_size =
+      map->pre_allocated_property_fields() +
+      map->unused_property_fields() -
+      map->inobject_properties();
+  ASSERT(prop_size >= 0);
   Object* properties = AllocateFixedArray(prop_size, pretenure);
   if (properties->IsFailure()) return properties;
 
@@ -2593,6 +2625,7 @@ Object* Heap::CopyFixedArray(FixedArray* src) {
 
 
 Object* Heap::AllocateFixedArray(int length) {
+  ASSERT(length >= 0);
   if (length == 0) return empty_fixed_array();
   Object* result = AllocateRawFixedArray(length);
   if (!result->IsFailure()) {
diff --git a/deps/v8/src/heap.h b/deps/v8/src/heap.h
index 179f9af10c..ec1e21af5b 100644
--- a/deps/v8/src/heap.h
+++ b/deps/v8/src/heap.h
@@ -852,7 +852,11 @@ class Heap : public AllStatic {
 
   static const int kMaxMapSpaceSize = 8*MB;
 
+#if defined(V8_TARGET_ARCH_X64)
+  static const int kMaxObjectSizeInNewSpace = 512*KB;
+#else
   static const int kMaxObjectSizeInNewSpace = 256*KB;
+#endif
 
   static NewSpace new_space_;
   static OldSpace* old_pointer_space_;
diff --git a/deps/v8/src/ia32/assembler-ia32.h b/deps/v8/src/ia32/assembler-ia32.h
index b648055f1b..6a90e070d8 100644
--- a/deps/v8/src/ia32/assembler-ia32.h
+++ b/deps/v8/src/ia32/assembler-ia32.h
@@ -437,7 +437,10 @@ class Assembler : public Malloced {
 
   // Distance between the address of the code target in the call instruction
   // and the return address
-  static const int kTargetAddrToReturnAddrDist = kPointerSize;
+  static const int kPatchReturnSequenceLength = kPointerSize;
+  // Distance between start of patched return sequence and the emitted address
+  // to jump to.
+  static const int kPatchReturnSequenceAddressOffset = 1;  // JMP imm32.
 
 
   // ---------------------------------------------------------------------------
diff --git a/deps/v8/src/ia32/builtins-ia32.cc b/deps/v8/src/ia32/builtins-ia32.cc
index a70a9d2acf..6de9de6ee5 100644
--- a/deps/v8/src/ia32/builtins-ia32.cc
+++ b/deps/v8/src/ia32/builtins-ia32.cc
@@ -37,7 +37,7 @@ namespace internal {
 
 
 void Builtins::Generate_Adaptor(MacroAssembler* masm, CFunctionId id) {
-  // TODO(1238487): Don't pass the function in a static variable.
+  // TODO(428): Don't pass the function in a static variable.
   ExternalReference passed = ExternalReference::builtin_passed_function();
   __ mov(Operand::StaticVariable(passed), edi);
 
@@ -180,12 +180,16 @@ void Builtins::Generate_JSConstructStubGeneric(MacroAssembler* masm) {
     // eax: initial map
     // ebx: JSObject
     // edi: start of next object
+    // Calculate the total number of properties described by the map.
     __ movzx_b(edx, FieldOperand(eax, Map::kUnusedPropertyFieldsOffset));
-    __ movzx_b(ecx, FieldOperand(eax, Map::kInObjectPropertiesOffset));
+    __ movzx_b(ecx, FieldOperand(eax, Map::kPreAllocatedPropertyFieldsOffset));
+    __ add(edx, Operand(ecx));
     // Calculate unused properties past the end of the in-object properties.
+    __ movzx_b(ecx, FieldOperand(eax, Map::kInObjectPropertiesOffset));
     __ sub(edx, Operand(ecx));
     // Done if no extra properties are to be allocated.
     __ j(zero, &allocated);
+    __ Assert(positive, "Property allocation count failed.");
 
     // Scale the number of elements by pointer size and add the header for
     // FixedArrays to the start of the next object calculation from above.
@@ -321,6 +325,7 @@ void Builtins::Generate_JSConstructStubGeneric(MacroAssembler* masm) {
   __ pop(ecx);
   __ lea(esp, Operand(esp, ebx, times_2, 1 * kPointerSize));  // 1 ~ receiver
   __ push(ecx);
+  __ IncrementCounter(&Counters::constructed_objects, 1);
   __ ret(0);
 }
 
diff --git a/deps/v8/src/ia32/codegen-ia32.cc b/deps/v8/src/ia32/codegen-ia32.cc
index 9542b1646f..b8b3db64bd 100644
--- a/deps/v8/src/ia32/codegen-ia32.cc
+++ b/deps/v8/src/ia32/codegen-ia32.cc
@@ -6752,11 +6752,10 @@ void GenericBinaryOpStub::Generate(MacroAssembler* masm) {
       // Reserve space for converted numbers.
       __ sub(Operand(esp), Immediate(2 * kPointerSize));
 
-      bool use_sse3 = CpuFeatures::IsSupported(CpuFeatures::SSE3);
-      if (use_sse3) {
+      if (use_sse3_) {
         // Truncate the operands to 32-bit integers and check for
         // exceptions in doing so.
-         CpuFeatures::Scope scope(CpuFeatures::SSE3);
+        CpuFeatures::Scope scope(CpuFeatures::SSE3);
         __ fisttp_s(Operand(esp, 0 * kPointerSize));
         __ fisttp_s(Operand(esp, 1 * kPointerSize));
         __ fnstsw_ax();
@@ -6841,7 +6840,7 @@ void GenericBinaryOpStub::Generate(MacroAssembler* masm) {
       // the runtime system.
       __ bind(&operand_conversion_failure);
       __ add(Operand(esp), Immediate(2 * kPointerSize));
-      if (use_sse3) {
+      if (use_sse3_) {
         // If we've used the SSE3 instructions for truncating the
         // floating point values to integers and it failed, we have a
         // pending #IA exception. Clear it.
@@ -7671,16 +7670,11 @@ void CEntryStub::GenerateBody(MacroAssembler* masm, bool is_debug_break) {
   Label throw_out_of_memory_exception;
   Label throw_normal_exception;
 
-  // Call into the runtime system. Collect garbage before the call if
-  // running with --gc-greedy set.
-  if (FLAG_gc_greedy) {
-    Failure* failure = Failure::RetryAfterGC(0);
-    __ mov(eax, Immediate(reinterpret_cast<int32_t>(failure)));
-  }
+  // Call into the runtime system.
   GenerateCore(masm, &throw_normal_exception,
                &throw_out_of_memory_exception,
                frame_type,
-               FLAG_gc_greedy,
+               false,
                false);
 
   // Do space-specific GC and retry runtime call.
diff --git a/deps/v8/src/ia32/codegen-ia32.h b/deps/v8/src/ia32/codegen-ia32.h
index 1d0cc8bdd2..afdbffe58e 100644
--- a/deps/v8/src/ia32/codegen-ia32.h
+++ b/deps/v8/src/ia32/codegen-ia32.h
@@ -299,14 +299,9 @@ class CodeGenerator: public AstVisitor {
 #endif
 
   static void SetFunctionInfo(Handle<JSFunction> fun,
-                              int length,
-                              int function_token_position,
-                              int start_position,
-                              int end_position,
-                              bool is_expression,
+                              FunctionLiteral* lit,
                               bool is_toplevel,
-                              Handle<Script> script,
-                              Handle<String> inferred_name);
+                              Handle<Script> script);
 
   // Accessors
   MacroAssembler* masm() { return masm_; }
@@ -623,6 +618,7 @@ class GenericBinaryOpStub: public CodeStub {
                       OverwriteMode mode,
                       GenericBinaryFlags flags)
       : op_(op), mode_(mode), flags_(flags) {
+    use_sse3_ = CpuFeatures::IsSupported(CpuFeatures::SSE3);
     ASSERT(OpBits::is_valid(Token::NUM_TOKENS));
   }
 
@@ -632,6 +628,7 @@ class GenericBinaryOpStub: public CodeStub {
   Token::Value op_;
   OverwriteMode mode_;
   GenericBinaryFlags flags_;
+  bool use_sse3_;
 
   const char* GetName();
 
@@ -644,9 +641,10 @@ class GenericBinaryOpStub: public CodeStub {
   }
 #endif
 
-  // Minor key encoding in 16 bits FOOOOOOOOOOOOOMM.
+  // Minor key encoding in 16 bits FSOOOOOOOOOOOOMM.
   class ModeBits: public BitField<OverwriteMode, 0, 2> {};
-  class OpBits: public BitField<Token::Value, 2, 13> {};
+  class OpBits: public BitField<Token::Value, 2, 12> {};
+  class SSE3Bits: public BitField<bool, 14, 1> {};
   class FlagBits: public BitField<GenericBinaryFlags, 15, 1> {};
 
   Major MajorKey() { return GenericBinaryOp; }
@@ -654,7 +652,8 @@ class GenericBinaryOpStub: public CodeStub {
     // Encode the parameters in a unique 16 bit value.
     return OpBits::encode(op_)
            | ModeBits::encode(mode_)
-           | FlagBits::encode(flags_);
+           | FlagBits::encode(flags_)
+           | SSE3Bits::encode(use_sse3_);
   }
   void Generate(MacroAssembler* masm);
 };
diff --git a/deps/v8/src/ia32/debug-ia32.cc b/deps/v8/src/ia32/debug-ia32.cc
index 9913a39ba9..4ef0862af1 100644
--- a/deps/v8/src/ia32/debug-ia32.cc
+++ b/deps/v8/src/ia32/debug-ia32.cc
@@ -195,8 +195,8 @@ void Debug::GenerateReturnDebugBreak(MacroAssembler* masm) {
 
 
 void Debug::GenerateReturnDebugBreakEntry(MacroAssembler* masm) {
-  // OK to clobber ebx as we are returning from a JS function in the code
-  // generated by Ia32CodeGenerator::ExitJSFrame.
+  // OK to clobber ebx as we are returning from a JS function through the code
+  // generated by CodeGenerator::GenerateReturnSequence()
   ExternalReference debug_break_return =
       ExternalReference(Debug_Address::DebugBreakReturn());
   __ mov(ebx, Operand::StaticVariable(debug_break_return));
diff --git a/deps/v8/src/ia32/ic-ia32.cc b/deps/v8/src/ia32/ic-ia32.cc
index 08ffe2f141..fa9b8a20f6 100644
--- a/deps/v8/src/ia32/ic-ia32.cc
+++ b/deps/v8/src/ia32/ic-ia32.cc
@@ -840,7 +840,7 @@ void KeyedStoreIC::RestoreInlinedVersion(Address address) {
 bool LoadIC::PatchInlinedLoad(Address address, Object* map, int offset) {
   // The address of the instruction following the call.
   Address test_instruction_address =
-      address + Assembler::kTargetAddrToReturnAddrDist;
+      address + Assembler::kPatchReturnSequenceLength;
   // If the instruction following the call is not a test eax, nothing
   // was inlined.
   if (*test_instruction_address != kTestEaxByte) return false;
@@ -867,7 +867,7 @@ bool LoadIC::PatchInlinedLoad(Address address, Object* map, int offset) {
 
 static bool PatchInlinedMapCheck(Address address, Object* map) {
   Address test_instruction_address =
-      address + Assembler::kTargetAddrToReturnAddrDist;
+      address + Assembler::kPatchReturnSequenceLength;
   // The keyed load has a fast inlined case if the IC call instruction
   // is immediately followed by a test instruction.
   if (*test_instruction_address != kTestEaxByte) return false;
diff --git a/deps/v8/src/ia32/macro-assembler-ia32.cc b/deps/v8/src/ia32/macro-assembler-ia32.cc
index 7782aa95c6..e362cd3c5b 100644
--- a/deps/v8/src/ia32/macro-assembler-ia32.cc
+++ b/deps/v8/src/ia32/macro-assembler-ia32.cc
@@ -82,8 +82,8 @@ static void RecordWriteHelper(MacroAssembler* masm,
   //   page_start + kObjectStartOffset + objectSize
   // where objectSize is FixedArray::kHeaderSize + kPointerSize * array_length.
   // Add the delta between the end of the normal RSet and the start of the
-  // extra RSet to 'object', so that addressing the bit using 'pointer_offset'
-  // hits the extra RSet words.
+  // extra RSet to 'page_start', so that addressing the bit using
+  // 'pointer_offset' hits the extra RSet words.
   masm->lea(page_start,
             Operand(page_start, array_length, times_pointer_size,
                     Page::kObjectStartOffset + FixedArray::kHeaderSize
diff --git a/deps/v8/src/ia32/regexp-macro-assembler-ia32.cc b/deps/v8/src/ia32/regexp-macro-assembler-ia32.cc
index a49c1f510e..bc8107633e 100644
--- a/deps/v8/src/ia32/regexp-macro-assembler-ia32.cc
+++ b/deps/v8/src/ia32/regexp-macro-assembler-ia32.cc
@@ -38,6 +38,7 @@
 namespace v8 {
 namespace internal {
 
+#ifdef V8_NATIVE_REGEXP
 /*
  * This assembler uses the following register assignment convention
  * - edx : current character. Must be loaded using LoadCurrentCharacter
@@ -54,7 +55,7 @@ namespace internal {
  *
  * Each call to a public method should retain this convention.
  * The stack will have the following structure:
- *       - stack_area_top     (High end of the memory area to use as
+ *       - stack_area_base     (High end of the memory area to use as
  *                             backtracking stack)
  *       - at_start           (if 1, start at start of string, if 0, don't)
  *       - int* capture_array (int[num_saved_registers_], for output).
@@ -78,13 +79,13 @@ namespace internal {
  * character of the string). The remaining registers starts out as garbage.
  *
  * The data up to the return address must be placed there by the calling
- * code, e.g., by calling the code entry as cast to:
+ * code, by calling the code entry as cast to a function with the signature:
  * int (*match)(String* input_string,
  *              Address start,
  *              Address end,
  *              int* capture_output_array,
  *              bool at_start,
- *              byte* stack_area_top)
+ *              byte* stack_area_base)
  */
 
 #define __ ACCESS_MASM(masm_)
@@ -93,7 +94,6 @@ RegExpMacroAssemblerIA32::RegExpMacroAssemblerIA32(
     Mode mode,
     int registers_to_save)
     : masm_(new MacroAssembler(NULL, kRegExpCodeSize)),
-      constants_(kRegExpConstantsSize),
       mode_(mode),
       num_registers_(registers_to_save),
       num_saved_registers_(registers_to_save),
@@ -156,13 +156,6 @@ void RegExpMacroAssemblerIA32::Bind(Label* label) {
 }
 
 
-void RegExpMacroAssemblerIA32::CheckBitmap(uc16 start,
-                                           Label* bitmap,
-                                           Label* on_zero) {
-  UNIMPLEMENTED();
-}
-
-
 void RegExpMacroAssemblerIA32::CheckCharacter(uint32_t c, Label* on_equal) {
   __ cmp(current_character(), c);
   BranchOrBacktrack(equal, on_equal);
@@ -217,15 +210,9 @@ void RegExpMacroAssemblerIA32::CheckCharacters(Vector<const uc16> str,
     BranchOrBacktrack(greater, on_failure);
   }
 
-  Label backtrack;
   if (on_failure == NULL) {
-    // Avoid inlining the Backtrack macro for each test.
-    Label skip_backtrack;
-    __ jmp(&skip_backtrack);
-    __ bind(&backtrack);
-    Backtrack();
-    __ bind(&skip_backtrack);
-    on_failure = &backtrack;
+    // Instead of inlining a backtrack, (re)use the global backtrack target.
+    on_failure = &backtrack_label_;
   }
 
   for (int i = 0; i < str.length(); i++) {
@@ -581,34 +568,6 @@ bool RegExpMacroAssemblerIA32::CheckSpecialCharacterClass(uc16 type,
   }
 }
 
-void RegExpMacroAssemblerIA32::DispatchHalfNibbleMap(
-    uc16 start,
-    Label* half_nibble_map,
-    const Vector<Label*>& destinations) {
-  UNIMPLEMENTED();
-}
-
-
-void RegExpMacroAssemblerIA32::DispatchByteMap(
-    uc16 start,
-    Label* byte_map,
-    const Vector<Label*>& destinations) {
-  UNIMPLEMENTED();
-}
-
-
-void RegExpMacroAssemblerIA32::DispatchHighByteMap(
-    byte start,
-    Label* byte_map,
-    const Vector<Label*>& destinations) {
-  UNIMPLEMENTED();
-}
-
-
-void RegExpMacroAssemblerIA32::EmitOrLink(Label* label) {
-  UNIMPLEMENTED();  // Has no use.
-}
-
 
 void RegExpMacroAssemblerIA32::Fail() {
   ASSERT(FAILURE == 0);  // Return value for failure is zero.
@@ -668,17 +627,17 @@ Handle<Object> RegExpMacroAssemblerIA32::GetCode(Handle<String> source) {
   __ mov(edi, Operand(ebp, kInputStart));
   // Set up edi to be negative offset from string end.
   __ sub(edi, Operand(esi));
-  if (num_saved_registers_ > 0) {
+  // Set eax to address of char before start of input
+  // (effectively string position -1).
+  __ lea(eax, Operand(edi, -char_size()));
+  // Store this value in a local variable, for use when clearing
+  // position registers.
+  __ mov(Operand(ebp, kInputStartMinusOne), eax);
+  if (num_saved_registers_ > 0) {  // Always is, if generated from a regexp.
     // Fill saved registers with initial value = start offset - 1
     // Fill in stack push order, to avoid accessing across an unwritten
     // page (a problem on Windows).
     __ mov(ecx, kRegisterZero);
-    // Set eax to address of char before start of input
-    // (effectively string position -1).
-    __ lea(eax, Operand(edi, -char_size()));
-    // Store this value in a local variable, for use when clearing
-    // position registers.
-    __ mov(Operand(ebp, kInputStartMinusOne), eax);
     Label init_loop;
     __ bind(&init_loop);
     __ mov(Operand(ebp, ecx, times_1, +0), eax);
@@ -942,139 +901,8 @@ void RegExpMacroAssemblerIA32::WriteStackPointerToRegister(int reg) {
 }
 
 
-RegExpMacroAssemblerIA32::Result RegExpMacroAssemblerIA32::Match(
-    Handle<Code> regexp_code,
-    Handle<String> subject,
-    int* offsets_vector,
-    int offsets_vector_length,
-    int previous_index) {
-
-  ASSERT(subject->IsFlat());
-  ASSERT(previous_index >= 0);
-  ASSERT(previous_index <= subject->length());
-
-  // No allocations before calling the regexp, but we can't use
-  // AssertNoAllocation, since regexps might be preempted, and another thread
-  // might do allocation anyway.
-
-  String* subject_ptr = *subject;
-  // Character offsets into string.
-  int start_offset = previous_index;
-  int end_offset = subject_ptr->length();
-
-  bool is_ascii = subject->IsAsciiRepresentation();
-
-  if (StringShape(subject_ptr).IsCons()) {
-    subject_ptr = ConsString::cast(subject_ptr)->first();
-  } else if (StringShape(subject_ptr).IsSliced()) {
-    SlicedString* slice = SlicedString::cast(subject_ptr);
-    start_offset += slice->start();
-    end_offset += slice->start();
-    subject_ptr = slice->buffer();
-  }
-  // Ensure that an underlying string has the same ascii-ness.
-  ASSERT(subject_ptr->IsAsciiRepresentation() == is_ascii);
-  ASSERT(subject_ptr->IsExternalString() || subject_ptr->IsSeqString());
-  // String is now either Sequential or External
-  int char_size_shift = is_ascii ? 0 : 1;
-  int char_length = end_offset - start_offset;
-
-  const byte* input_start =
-      StringCharacterPosition(subject_ptr, start_offset);
-  int byte_length = char_length << char_size_shift;
-  const byte* input_end = input_start + byte_length;
-  RegExpMacroAssemblerIA32::Result res = Execute(*regexp_code,
-                                                 subject_ptr,
-                                                 start_offset,
-                                                 input_start,
-                                                 input_end,
-                                                 offsets_vector,
-                                                 previous_index == 0);
-
-  if (res == SUCCESS) {
-    // Capture values are relative to start_offset only.
-    // Convert them to be relative to start of string.
-    for (int i = 0; i < offsets_vector_length; i++) {
-      if (offsets_vector[i] >= 0) {
-        offsets_vector[i] += previous_index;
-      }
-    }
-  }
-
-  return res;
-}
-
 // Private methods:
 
-static unibrow::Mapping<unibrow::Ecma262Canonicalize> canonicalize;
-
-RegExpMacroAssemblerIA32::Result RegExpMacroAssemblerIA32::Execute(
-    Code* code,
-    String* input,
-    int start_offset,
-    const byte* input_start,
-    const byte* input_end,
-    int* output,
-    bool at_start) {
-  typedef int (*matcher)(String*, int, const byte*,
-                         const byte*, int*, int, Address);
-  matcher matcher_func = FUNCTION_CAST<matcher>(code->entry());
-
-  int at_start_val = at_start ? 1 : 0;
-
-  // Ensure that the minimum stack has been allocated.
-  RegExpStack stack;
-  Address stack_top = RegExpStack::stack_top();
-
-  int result = matcher_func(input,
-                            start_offset,
-                            input_start,
-                            input_end,
-                            output,
-                            at_start_val,
-                            stack_top);
-  ASSERT(result <= SUCCESS);
-  ASSERT(result >= RETRY);
-
-  if (result == EXCEPTION && !Top::has_pending_exception()) {
-    // We detected a stack overflow (on the backtrack stack) in RegExp code,
-    // but haven't created the exception yet.
-    Top::StackOverflow();
-  }
-  return static_cast<Result>(result);
-}
-
-
-int RegExpMacroAssemblerIA32::CaseInsensitiveCompareUC16(Address byte_offset1,
-                                                         Address byte_offset2,
-                                                         size_t byte_length) {
-  // This function is not allowed to cause a garbage collection.
-  // A GC might move the calling generated code and invalidate the
-  // return address on the stack.
-  ASSERT(byte_length % 2 == 0);
-  uc16* substring1 = reinterpret_cast<uc16*>(byte_offset1);
-  uc16* substring2 = reinterpret_cast<uc16*>(byte_offset2);
-  size_t length = byte_length >> 1;
-
-  for (size_t i = 0; i < length; i++) {
-    unibrow::uchar c1 = substring1[i];
-    unibrow::uchar c2 = substring2[i];
-    if (c1 != c2) {
-      unibrow::uchar s1[1] = { c1 };
-      canonicalize.get(c1, '\0', s1);
-      if (s1[0] != c2) {
-        unibrow::uchar s2[1] = { c2 };
-        canonicalize.get(c2, '\0', s2);
-        if (s1[0] != s2[0]) {
-          return 0;
-        }
-      }
-    }
-  }
-  return 1;
-}
-
-
 void RegExpMacroAssemblerIA32::CallCheckStackGuardState(Register scratch) {
   int num_arguments = 3;
   FrameAlign(num_arguments, scratch);
@@ -1096,35 +924,6 @@ static T& frame_entry(Address re_frame, int frame_offset) {
 }
 
 
-const byte* RegExpMacroAssemblerIA32::StringCharacterPosition(String* subject,
-                                                              int start_index) {
-  // Not just flat, but ultra flat.
-  ASSERT(subject->IsExternalString() || subject->IsSeqString());
-  ASSERT(start_index >= 0);
-  ASSERT(start_index <= subject->length());
-  if (subject->IsAsciiRepresentation()) {
-    const byte* address;
-    if (StringShape(subject).IsExternal()) {
-      const char* data = ExternalAsciiString::cast(subject)->resource()->data();
-      address = reinterpret_cast<const byte*>(data);
-    } else {
-      ASSERT(subject->IsSeqAsciiString());
-      char* data = SeqAsciiString::cast(subject)->GetChars();
-      address = reinterpret_cast<const byte*>(data);
-    }
-    return address + start_index;
-  }
-  const uc16* data;
-  if (StringShape(subject).IsExternal()) {
-    data = ExternalTwoByteString::cast(subject)->resource()->data();
-  } else {
-    ASSERT(subject->IsSeqTwoByteString());
-    data = SeqTwoByteString::cast(subject)->GetChars();
-  }
-  return reinterpret_cast<const byte*>(data + start_index);
-}
-
-
 int RegExpMacroAssemblerIA32::CheckStackGuardState(Address* return_address,
                                                    Code* re_code,
                                                    Address re_frame) {
@@ -1198,18 +997,18 @@ int RegExpMacroAssemblerIA32::CheckStackGuardState(Address* return_address,
 
 
 Address RegExpMacroAssemblerIA32::GrowStack(Address stack_pointer,
-                                            Address* stack_top) {
+                                            Address* stack_base) {
   size_t size = RegExpStack::stack_capacity();
-  Address old_stack_top = RegExpStack::stack_top();
-  ASSERT(old_stack_top == *stack_top);
-  ASSERT(stack_pointer <= old_stack_top);
-  ASSERT(static_cast<size_t>(old_stack_top - stack_pointer) <= size);
-  Address new_stack_top = RegExpStack::EnsureCapacity(size * 2);
-  if (new_stack_top == NULL) {
+  Address old_stack_base = RegExpStack::stack_base();
+  ASSERT(old_stack_base == *stack_base);
+  ASSERT(stack_pointer <= old_stack_base);
+  ASSERT(static_cast<size_t>(old_stack_base - stack_pointer) <= size);
+  Address new_stack_base = RegExpStack::EnsureCapacity(size * 2);
+  if (new_stack_base == NULL) {
     return NULL;
   }
-  *stack_top = new_stack_top;
-  return new_stack_top - (old_stack_top - stack_pointer);
+  *stack_base = new_stack_base;
+  return new_stack_base - (old_stack_base - stack_pointer);
 }
 
 
@@ -1373,11 +1172,8 @@ void RegExpMacroAssemblerIA32::LoadCurrentCharacterUnchecked(int cp_offset,
 }
 
 
-void RegExpMacroAssemblerIA32::LoadConstantBufferAddress(Register reg,
-                                                         ArraySlice* buffer) {
-  __ mov(reg, buffer->array());
-  __ add(Operand(reg), Immediate(buffer->base_offset()));
-}
-
 #undef __
+
+#endif  // V8_NATIVE_REGEXP
+
 }}  // namespace v8::internal
diff --git a/deps/v8/src/ia32/regexp-macro-assembler-ia32.h b/deps/v8/src/ia32/regexp-macro-assembler-ia32.h
index c3d9155700..d11439299c 100644
--- a/deps/v8/src/ia32/regexp-macro-assembler-ia32.h
+++ b/deps/v8/src/ia32/regexp-macro-assembler-ia32.h
@@ -31,21 +31,16 @@
 namespace v8 {
 namespace internal {
 
+#ifndef V8_NATIVE_REGEXP
 class RegExpMacroAssemblerIA32: public RegExpMacroAssembler {
  public:
-  // Type of input string to generate code for.
-  enum Mode { ASCII = 1, UC16 = 2 };
-  // Result of calling the generated RegExp code:
-  // RETRY: Something significant changed during execution, and the matching
-  //        should be retried from scratch.
-  // EXCEPTION: Something failed during execution. If no exception has been
-  //        thrown, it's an internal out-of-memory, and the caller should
-  //        throw the exception.
-  // FAILURE: Matching failed.
-  // SUCCESS: Matching succeeded, and the output array has been filled with
-  //        capture positions.
-  enum Result { RETRY = -2, EXCEPTION = -1, FAILURE = 0, SUCCESS = 1 };
+  RegExpMacroAssemblerIA32() { }
+  virtual ~RegExpMacroAssemblerIA32() { }
+};
 
+#else
+class RegExpMacroAssemblerIA32: public NativeRegExpMacroAssembler {
+ public:
   RegExpMacroAssemblerIA32(Mode mode, int registers_to_save);
   virtual ~RegExpMacroAssemblerIA32();
   virtual int stack_limit_slack();
@@ -54,7 +49,6 @@ class RegExpMacroAssemblerIA32: public RegExpMacroAssembler {
   virtual void Backtrack();
   virtual void Bind(Label* label);
   virtual void CheckAtStart(Label* on_at_start);
-  virtual void CheckBitmap(uc16 start, Label* bitmap, Label* on_zero);
   virtual void CheckCharacter(uint32_t c, Label* on_equal);
   virtual void CheckCharacterAfterAnd(uint32_t c,
                                       uint32_t mask,
@@ -88,16 +82,6 @@ class RegExpMacroAssemblerIA32: public RegExpMacroAssembler {
                                           int cp_offset,
                                           bool check_offset,
                                           Label* on_no_match);
-  virtual void DispatchByteMap(uc16 start,
-                               Label* byte_map,
-                               const Vector<Label*>& destinations);
-  virtual void DispatchHalfNibbleMap(uc16 start,
-                                     Label* half_nibble_map,
-                                     const Vector<Label*>& destinations);
-  virtual void DispatchHighByteMap(byte start,
-                                   Label* byte_map,
-                                   const Vector<Label*>& destinations);
-  virtual void EmitOrLink(Label* label);
   virtual void Fail();
   virtual Handle<Object> GetCode(Handle<String> source);
   virtual void GoTo(Label* label);
@@ -123,20 +107,6 @@ class RegExpMacroAssemblerIA32: public RegExpMacroAssembler {
   virtual void ClearRegisters(int reg_from, int reg_to);
   virtual void WriteStackPointerToRegister(int reg);
 
-  static Result Match(Handle<Code> regexp,
-                      Handle<String> subject,
-                      int* offsets_vector,
-                      int offsets_vector_length,
-                      int previous_index);
-
-  static Result Execute(Code* code,
-                        String* input,
-                        int start_offset,
-                        const byte* input_start,
-                        const byte* input_end,
-                        int* output,
-                        bool at_start);
-
  private:
   // Offsets from ebp of function parameters and stored registers.
   static const int kFramePointer = 0;
@@ -163,16 +133,6 @@ class RegExpMacroAssemblerIA32: public RegExpMacroAssembler {
 
   // Initial size of code buffer.
   static const size_t kRegExpCodeSize = 1024;
-  // Initial size of constant buffers allocated during compilation.
-  static const int kRegExpConstantsSize = 256;
-
-  static const byte* StringCharacterPosition(String* subject, int start_index);
-
-  // Compares two-byte strings case insensitively.
-  // Called from generated RegExp code.
-  static int CaseInsensitiveCompareUC16(Address byte_offset1,
-                                        Address byte_offset2,
-                                        size_t byte_length);
 
   // Load a number of characters at the given offset from the
   // current position, into the current-character register.
@@ -218,11 +178,6 @@ class RegExpMacroAssemblerIA32: public RegExpMacroAssembler {
   // is NULL, in which case it is a conditional Backtrack.
   void BranchOrBacktrack(Condition condition, Label* to, Hint hint = no_hint);
 
-  // Load the address of a "constant buffer" (a slice of a byte array)
-  // into a register. The address is computed from the ByteArray* address
-  // and an offset. Uses no extra registers.
-  void LoadConstantBufferAddress(Register reg, ArraySlice* buffer);
-
   // Call and return internally in the generated code in a way that
   // is GC-safe (i.e., doesn't leave absolute code addresses on the stack)
   inline void SafeCall(Label* to);
@@ -258,10 +213,6 @@ class RegExpMacroAssemblerIA32: public RegExpMacroAssembler {
 
   MacroAssembler* masm_;
 
-  // Constant buffer provider. Allocates external storage for storing
-  // constants.
-  ByteArrayProvider constants_;
-
   // Which mode to generate code for (ASCII or UC16).
   Mode mode_;
 
@@ -281,6 +232,7 @@ class RegExpMacroAssemblerIA32: public RegExpMacroAssembler {
   Label check_preempt_label_;
   Label stack_overflow_label_;
 };
+#endif  // V8_NATIVE_REGEXP
 
 }}  // namespace v8::internal
 
diff --git a/deps/v8/src/ic-inl.h b/deps/v8/src/ic-inl.h
index 08304d83e7..38d61dcbb4 100644
--- a/deps/v8/src/ic-inl.h
+++ b/deps/v8/src/ic-inl.h
@@ -38,7 +38,7 @@ namespace internal {
 
 Address IC::address() {
   // Get the address of the call.
-  Address result = pc() - Assembler::kTargetAddrToReturnAddrDist;
+  Address result = pc() - Assembler::kPatchReturnSequenceLength;
 
 #ifdef ENABLE_DEBUGGER_SUPPORT
   // First check if any break points are active if not just return the address
diff --git a/deps/v8/src/ic.cc b/deps/v8/src/ic.cc
index f4d74c9354..393ccbf6a7 100644
--- a/deps/v8/src/ic.cc
+++ b/deps/v8/src/ic.cc
@@ -122,7 +122,7 @@ Address IC::OriginalCodeAddress() {
   // 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::kTargetAddrToReturnAddrDist;
+  Address addr = pc() - Assembler::kPatchReturnSequenceLength;
   // 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.
diff --git a/deps/v8/src/ic.h b/deps/v8/src/ic.h
index 860b7e60d6..007b0352e9 100644
--- a/deps/v8/src/ic.h
+++ b/deps/v8/src/ic.h
@@ -390,7 +390,7 @@ class KeyedStoreIC: public IC {
   // Support for patching the map that is checked in an inlined
   // version of keyed store.
   // The address is the patch point for the IC call
-  // (Assembler::kTargetAddrToReturnAddrDist before the end of
+  // (Assembler::kPatchReturnSequenceLength before the end of
   // the call/return address).
   // The map is the new map that the inlined code should check against.
   static bool PatchInlinedStore(Address address, Object* map);
diff --git a/deps/v8/src/jsregexp.cc b/deps/v8/src/jsregexp.cc
index bd511024bb..06208aa50a 100644
--- a/deps/v8/src/jsregexp.cc
+++ b/deps/v8/src/jsregexp.cc
@@ -43,6 +43,7 @@
 #include "regexp-macro-assembler-irregexp.h"
 #include "regexp-stack.h"
 
+#ifdef V8_NATIVE_REGEXP
 #if V8_TARGET_ARCH_IA32
 #include "ia32/macro-assembler-ia32.h"
 #include "ia32/regexp-macro-assembler-ia32.h"
@@ -54,6 +55,7 @@
 #else
 #error Unsupported target architecture.
 #endif
+#endif
 
 #include "interpreter-irregexp.h"
 
@@ -270,10 +272,11 @@ Handle<Object> RegExpImpl::AtomExec(Handle<JSRegExp> re,
 // If compilation fails, an exception is thrown and this function
 // returns false.
 bool RegExpImpl::EnsureCompiledIrregexp(Handle<JSRegExp> re, bool is_ascii) {
+  Object* compiled_code = re->DataAt(JSRegExp::code_index(is_ascii));
 #ifdef V8_NATIVE_REGEXP
-  if (re->DataAt(JSRegExp::code_index(is_ascii))->IsCode()) return true;
+  if (compiled_code->IsCode()) return true;
 #else  // ! V8_NATIVE_REGEXP (RegExp interpreter code)
-  if (re->DataAt(JSRegExp::code_index(is_ascii))->IsByteArray()) return true;
+  if (compiled_code->IsByteArray()) return true;
 #endif
   return CompileIrregexp(re, is_ascii);
 }
@@ -414,33 +417,36 @@ Handle<Object> RegExpImpl::IrregexpExec(Handle<JSRegExp> jsregexp,
 
   // Dispatch to the correct RegExp implementation.
   Handle<FixedArray> regexp(FixedArray::cast(jsregexp->data()));
+
 #ifdef V8_NATIVE_REGEXP
-#if V8_TARGET_ARCH_IA32
+#ifdef V8_TARGET_ARCH_ARM
+  UNIMPLEMENTED();
+#else  // Native regexp supported.
   OffsetsVector captures(number_of_capture_registers);
   int* captures_vector = captures.vector();
-  RegExpMacroAssemblerIA32::Result res;
+  NativeRegExpMacroAssembler::Result res;
   do {
     bool is_ascii = subject->IsAsciiRepresentation();
     if (!EnsureCompiledIrregexp(jsregexp, is_ascii)) {
       return Handle<Object>::null();
     }
     Handle<Code> code(RegExpImpl::IrregexpNativeCode(*regexp, is_ascii));
-    res = RegExpMacroAssemblerIA32::Match(code,
-                                          subject,
-                                          captures_vector,
-                                          captures.length(),
-                                          previous_index);
+    res = NativeRegExpMacroAssembler::Match(code,
+                                            subject,
+                                            captures_vector,
+                                            captures.length(),
+                                            previous_index);
     // If result is RETRY, the string have changed representation, and we
     // must restart from scratch.
-  } while (res == RegExpMacroAssemblerIA32::RETRY);
-  if (res == RegExpMacroAssemblerIA32::EXCEPTION) {
+  } while (res == NativeRegExpMacroAssembler::RETRY);
+  if (res == NativeRegExpMacroAssembler::EXCEPTION) {
     ASSERT(Top::has_pending_exception());
     return Handle<Object>::null();
   }
-  ASSERT(res == RegExpMacroAssemblerIA32::SUCCESS
-      || res == RegExpMacroAssemblerIA32::FAILURE);
+  ASSERT(res == NativeRegExpMacroAssembler::SUCCESS
+      || res == NativeRegExpMacroAssembler::FAILURE);
 
-  if (res != RegExpMacroAssemblerIA32::SUCCESS) return Factory::null_value();
+  if (res != NativeRegExpMacroAssembler::SUCCESS) return Factory::null_value();
 
   array = Handle<FixedArray>(FixedArray::cast(last_match_info->elements()));
   ASSERT(array->length() >= number_of_capture_registers + kLastMatchOverhead);
@@ -449,10 +455,9 @@ Handle<Object> RegExpImpl::IrregexpExec(Handle<JSRegExp> jsregexp,
     SetCapture(*array, i, captures_vector[i]);
     SetCapture(*array, i + 1, captures_vector[i + 1]);
   }
-#else  // !V8_TARGET_ARCH_IA32
-    UNREACHABLE();
-#endif  // V8_TARGET_ARCH_IA32
-#else  // !V8_NATIVE_REGEXP
+#endif  // Native regexp supported.
+
+#else  // ! V8_NATIVE_REGEXP
   bool is_ascii = subject->IsAsciiRepresentation();
   if (!EnsureCompiledIrregexp(jsregexp, is_ascii)) {
     return Handle<Object>::null();
@@ -4457,38 +4462,36 @@ RegExpEngine::CompilationResult RegExpEngine::Compile(RegExpCompileData* data,
 
   NodeInfo info = *node->info();
 
+  // Create the correct assembler for the architecture.
 #ifdef V8_NATIVE_REGEXP
-#ifdef V8_TARGET_ARCH_ARM
-  // ARM native regexp not implemented yet.
-  UNREACHABLE();
-#endif
-#ifdef V8_TARGET_ARCH_X64
-  // X64 native regexp not implemented yet.
-  UNREACHABLE();
-#endif
+  // Native regexp implementation.
+
+  NativeRegExpMacroAssembler::Mode mode =
+      is_ascii ? NativeRegExpMacroAssembler::ASCII
+               : NativeRegExpMacroAssembler::UC16;
+
 #ifdef V8_TARGET_ARCH_IA32
-  RegExpMacroAssemblerIA32::Mode mode;
-  if (is_ascii) {
-    mode = RegExpMacroAssemblerIA32::ASCII;
-  } else {
-    mode = RegExpMacroAssemblerIA32::UC16;
-  }
   RegExpMacroAssemblerIA32 macro_assembler(mode,
                                            (data->capture_count + 1) * 2);
-  return compiler.Assemble(&macro_assembler,
-                           node,
-                           data->capture_count,
-                           pattern);
 #endif
+#ifdef V8_TARGET_ARCH_X64
+  RegExpMacroAssemblerX64 macro_assembler(mode,
+                                          (data->capture_count + 1) * 2);
+#endif
+#ifdef V8_TARGET_ARCH_ARM
+  UNIMPLEMENTED();
+#endif
+
 #else  // ! V8_NATIVE_REGEXP
-  // Interpreted regexp.
+  // Interpreted regexp implementation.
   EmbeddedVector<byte, 1024> codes;
   RegExpMacroAssemblerIrregexp macro_assembler(codes);
+#endif
+
   return compiler.Assemble(&macro_assembler,
                            node,
                            data->capture_count,
                            pattern);
-#endif  // V8_NATIVE_REGEXP
 }
 
 }}  // namespace v8::internal
diff --git a/deps/v8/src/math.js b/deps/v8/src/math.js
index db75cb28ae..e3d266e4be 100644
--- a/deps/v8/src/math.js
+++ b/deps/v8/src/math.js
@@ -184,6 +184,7 @@ function MathTan(x) {
 function SetupMath() {
   // Setup math constants.
   // ECMA-262, section 15.8.1.1.
+  %OptimizeObjectForAddingMultipleProperties($Math, 8);
   %SetProperty($Math,
                "E",
                2.7182818284590452354,
@@ -219,6 +220,7 @@ function SetupMath() {
                "SQRT2",
                1.4142135623730951,
                DONT_ENUM |  DONT_DELETE | READ_ONLY);
+  %TransformToFastProperties($Math);
 
   // Setup non-enumerable functions of the Math object and
   // set their names.
diff --git a/deps/v8/src/objects-debug.cc b/deps/v8/src/objects-debug.cc
index 40001f9619..e97b207bac 100644
--- a/deps/v8/src/objects-debug.cc
+++ b/deps/v8/src/objects-debug.cc
@@ -371,9 +371,9 @@ void JSObject::JSObjectVerify() {
   VerifyHeapPointer(properties());
   VerifyHeapPointer(elements());
   if (HasFastProperties()) {
-    CHECK(map()->unused_property_fields() ==
-          (map()->inobject_properties() + properties()->length() -
-           map()->NextFreePropertyIndex()));
+    CHECK_EQ(map()->unused_property_fields(),
+             (map()->inobject_properties() + properties()->length() -
+              map()->NextFreePropertyIndex()));
   }
 }
 
@@ -462,6 +462,7 @@ void Map::MapPrint() {
   HeapObject::PrintHeader("Map");
   PrintF(" - type: %s\n", TypeToString(instance_type()));
   PrintF(" - instance size: %d\n", instance_size());
+  PrintF(" - inobject properties: %d\n", inobject_properties());
   PrintF(" - unused property fields: %d\n", unused_property_fields());
   if (is_hidden_prototype()) {
     PrintF(" - hidden_prototype\n");
@@ -619,6 +620,12 @@ void SharedFunctionInfo::SharedFunctionInfoPrint() {
   PrintF("\n - debug info = ");
   debug_info()->ShortPrint();
   PrintF("\n - length = %d", length());
+  PrintF("\n - has_only_this_property_assignments = %d",
+         has_only_this_property_assignments());
+  PrintF("\n - has_only_simple_this_property_assignments = %d",
+         has_only_simple_this_property_assignments());
+  PrintF("\n - this_property_assignments = ");
+  this_property_assignments()->ShortPrint();
   PrintF("\n");
 }
 
diff --git a/deps/v8/src/objects-inl.h b/deps/v8/src/objects-inl.h
index a3bd3ce1ca..7b750b61ea 100644
--- a/deps/v8/src/objects-inl.h
+++ b/deps/v8/src/objects-inl.h
@@ -91,7 +91,13 @@ PropertyDetails PropertyDetails::AsDeleted() {
   }
 
 
-#define BOOL_ACCESSORS(holder, field, name, offset) \
+#define BOOL_GETTER(holder, field, name, offset)           \
+  bool holder::name() {                                    \
+    return BooleanBit::get(field(), offset);               \
+  }                                                        \
+
+
+#define BOOL_ACCESSORS(holder, field, name, offset)        \
   bool holder::name() {                                    \
     return BooleanBit::get(field(), offset);               \
   }                                                        \
@@ -1937,6 +1943,11 @@ int Map::inobject_properties() {
 }
 
 
+int Map::pre_allocated_property_fields() {
+  return READ_BYTE_FIELD(this, kPreAllocatedPropertyFieldsOffset);
+}
+
+
 int HeapObject::SizeFromMap(Map* map) {
   InstanceType instance_type = map->instance_type();
   // Only inline the most frequent cases.
@@ -1969,6 +1980,14 @@ void Map::set_inobject_properties(int value) {
 }
 
 
+void Map::set_pre_allocated_property_fields(int value) {
+  ASSERT(0 <= value && value < 256);
+  WRITE_BYTE_FIELD(this,
+                   kPreAllocatedPropertyFieldsOffset,
+                   static_cast<byte>(value));
+}
+
+
 InstanceType Map::instance_type() {
   return static_cast<InstanceType>(READ_BYTE_FIELD(this, kInstanceTypeOffset));
 }
@@ -2298,6 +2317,8 @@ ACCESSORS(SharedFunctionInfo, function_data, Object,
 ACCESSORS(SharedFunctionInfo, script, Object, kScriptOffset)
 ACCESSORS(SharedFunctionInfo, debug_info, Object, kDebugInfoOffset)
 ACCESSORS(SharedFunctionInfo, inferred_name, String, kInferredNameOffset)
+ACCESSORS(SharedFunctionInfo, this_property_assignments, Object,
+          kThisPropertyAssignmentsOffset)
 
 BOOL_ACCESSORS(FunctionTemplateInfo, flag, hidden_prototype,
                kHiddenPrototypeBit)
@@ -2308,6 +2329,13 @@ BOOL_ACCESSORS(SharedFunctionInfo, start_position_and_type, is_expression,
                kIsExpressionBit)
 BOOL_ACCESSORS(SharedFunctionInfo, start_position_and_type, is_toplevel,
                kIsTopLevelBit)
+BOOL_GETTER(SharedFunctionInfo, compiler_hints,
+            has_only_this_property_assignments,
+            kHasOnlyThisPropertyAssignments)
+BOOL_GETTER(SharedFunctionInfo, compiler_hints,
+            has_only_simple_this_property_assignments,
+            kHasOnlySimpleThisPropertyAssignments)
+
 
 INT_ACCESSORS(SharedFunctionInfo, length, kLengthOffset)
 INT_ACCESSORS(SharedFunctionInfo, formal_parameter_count,
@@ -2319,6 +2347,10 @@ INT_ACCESSORS(SharedFunctionInfo, start_position_and_type,
 INT_ACCESSORS(SharedFunctionInfo, end_position, kEndPositionOffset)
 INT_ACCESSORS(SharedFunctionInfo, function_token_position,
               kFunctionTokenPositionOffset)
+INT_ACCESSORS(SharedFunctionInfo, compiler_hints,
+              kCompilerHintsOffset)
+INT_ACCESSORS(SharedFunctionInfo, this_property_assignments_count,
+              kThisPropertyAssignmentsCountOffset)
 
 
 void SharedFunctionInfo::DontAdaptArguments() {
diff --git a/deps/v8/src/objects.cc b/deps/v8/src/objects.cc
index c3051b811c..e4a3a67a57 100644
--- a/deps/v8/src/objects.cc
+++ b/deps/v8/src/objects.cc
@@ -4780,6 +4780,48 @@ Object* SharedFunctionInfo::GetSourceCode() {
 }
 
 
+int SharedFunctionInfo::CalculateInstanceSize() {
+  int instance_size =
+      JSObject::kHeaderSize +
+      expected_nof_properties() * kPointerSize;
+  if (instance_size > JSObject::kMaxInstanceSize) {
+    instance_size = JSObject::kMaxInstanceSize;
+  }
+  return instance_size;
+}
+
+
+int SharedFunctionInfo::CalculateInObjectProperties() {
+  return (CalculateInstanceSize() - JSObject::kHeaderSize) / kPointerSize;
+}
+
+
+void SharedFunctionInfo::SetThisPropertyAssignmentsInfo(
+    bool only_this_property_assignments,
+    bool only_simple_this_property_assignments,
+    FixedArray* assignments) {
+  ASSERT(this_property_assignments()->IsUndefined());
+  set_compiler_hints(BooleanBit::set(compiler_hints(),
+                                     kHasOnlyThisPropertyAssignments,
+                                     only_this_property_assignments));
+  set_compiler_hints(BooleanBit::set(compiler_hints(),
+                                     kHasOnlySimpleThisPropertyAssignments,
+                                     only_simple_this_property_assignments));
+  set_this_property_assignments(assignments);
+  set_this_property_assignments_count(assignments->length() / 3);
+}
+
+
+String* SharedFunctionInfo::GetThisPropertyAssignmentName(int index) {
+  Object* obj = this_property_assignments();
+  ASSERT(obj->IsFixedArray());
+  ASSERT(index < this_property_assignments_count());
+  obj = FixedArray::cast(obj)->get(index * 3);
+  ASSERT(obj->IsString());
+  return String::cast(obj);
+}
+
+
 // Support function for printing the source code to a StringStream
 // without any allocation in the heap.
 void SharedFunctionInfo::SourceCodePrint(StringStream* accumulator,
@@ -4826,6 +4868,8 @@ void SharedFunctionInfo::SharedFunctionInfoIterateBody(ObjectVisitor* v) {
   IteratePointers(v, kNameOffset, kConstructStubOffset + kPointerSize);
   IteratePointers(v, kInstanceClassNameOffset, kScriptOffset + kPointerSize);
   IteratePointers(v, kDebugInfoOffset, kInferredNameOffset + kPointerSize);
+  IteratePointers(v, kThisPropertyAssignmentsOffset,
+      kThisPropertyAssignmentsOffset + kPointerSize);
 }
 
 
diff --git a/deps/v8/src/objects.h b/deps/v8/src/objects.h
index 03f0f3dd6b..a4029614e8 100644
--- a/deps/v8/src/objects.h
+++ b/deps/v8/src/objects.h
@@ -2704,6 +2704,10 @@ class Map: public HeapObject {
   inline int inobject_properties();
   inline void set_inobject_properties(int value);
 
+  // Count of property fields pre-allocated in the object when first allocated.
+  inline int pre_allocated_property_fields();
+  inline void set_pre_allocated_property_fields(int value);
+
   // Instance type.
   inline InstanceType instance_type();
   inline void set_instance_type(InstanceType value);
@@ -2869,6 +2873,8 @@ class Map: public HeapObject {
   void MapVerify();
 #endif
 
+  static const int kMaxPreAllocatedPropertyFields = 255;
+
   // Layout description.
   static const int kInstanceSizesOffset = HeapObject::kHeaderSize;
   static const int kInstanceAttributesOffset = kInstanceSizesOffset + kIntSize;
@@ -2882,7 +2888,8 @@ class Map: public HeapObject {
   // Byte offsets within kInstanceSizesOffset.
   static const int kInstanceSizeOffset = kInstanceSizesOffset + 0;
   static const int kInObjectPropertiesOffset = kInstanceSizesOffset + 1;
-  // The bytes at positions 2 and 3 are not in use at the moment.
+  static const int kPreAllocatedPropertyFieldsOffset = kInstanceSizesOffset + 2;
+  // The byte at position 3 is not in use at the moment.
 
   // Byte offsets within kInstanceAttributesOffset attributes.
   static const int kInstanceTypeOffset = kInstanceAttributesOffset + 0;
@@ -3090,10 +3097,42 @@ class SharedFunctionInfo: public HeapObject {
   inline bool is_toplevel();
   inline void set_is_toplevel(bool value);
 
+  // Bit field containing various information collected by the compiler to
+  // drive optimization.
+  inline int compiler_hints();
+  inline void set_compiler_hints(int value);
+
+  // Add information on assignments of the form this.x = ...;
+  void SetThisPropertyAssignmentsInfo(
+      bool has_only_this_property_assignments,
+      bool has_only_simple_this_property_assignments,
+      FixedArray* this_property_assignments);
+
+  // Indicate that this function only consists of assignments of the form
+  // this.x = ...;.
+  inline bool has_only_this_property_assignments();
+
+  // Indicate that this function only consists of assignments of the form
+  // this.x = y; where y is either a constant or refers to an argument.
+  inline bool has_only_simple_this_property_assignments();
+
+  // For functions which only contains this property assignments this provides
+  // access to the names for the properties assigned.
+  DECL_ACCESSORS(this_property_assignments, Object)
+  inline int this_property_assignments_count();
+  inline void set_this_property_assignments_count(int value);
+  String* GetThisPropertyAssignmentName(int index);
+
   // [source code]: Source code for the function.
   bool HasSourceCode();
   Object* GetSourceCode();
 
+  // Calculate the instance size.
+  int CalculateInstanceSize();
+
+  // Calculate the number of in-object properties.
+  int CalculateInObjectProperties();
+
   // Dispatched behavior.
   void SharedFunctionInfoIterateBody(ObjectVisitor* v);
   // Set max_length to -1 for unlimited length.
@@ -3129,7 +3168,12 @@ class SharedFunctionInfo: public HeapObject {
   static const int kScriptOffset = kExternalReferenceDataOffset + kPointerSize;
   static const int kDebugInfoOffset = kScriptOffset + kPointerSize;
   static const int kInferredNameOffset = kDebugInfoOffset + kPointerSize;
-  static const int kSize = kInferredNameOffset + kPointerSize;
+  static const int kCompilerHintsOffset = kInferredNameOffset + kPointerSize;
+  static const int kThisPropertyAssignmentsOffset =
+      kCompilerHintsOffset + kPointerSize;
+  static const int kThisPropertyAssignmentsCountOffset =
+      kThisPropertyAssignmentsOffset + kPointerSize;
+  static const int kSize = kThisPropertyAssignmentsCountOffset + kPointerSize;
 
  private:
   // Bit positions in length_and_flg.
@@ -3146,6 +3190,10 @@ class SharedFunctionInfo: public HeapObject {
   static const int kStartPositionShift = 2;
   static const int kStartPositionMask = ~((1 << kStartPositionShift) - 1);
 
+  // Bit positions in compiler_hints.
+  static const int kHasOnlyThisPropertyAssignments = 0;
+  static const int kHasOnlySimpleThisPropertyAssignments = 1;
+
   DISALLOW_IMPLICIT_CONSTRUCTORS(SharedFunctionInfo);
 };
 
diff --git a/deps/v8/src/parser.cc b/deps/v8/src/parser.cc
index 348c12a4ac..5cc6341f9a 100644
--- a/deps/v8/src/parser.cc
+++ b/deps/v8/src/parser.cc
@@ -97,7 +97,7 @@ class Parser {
 
   // Pre-parse the program from the character stream; returns true on
   // success, false if a stack-overflow happened during parsing.
-  bool PreParseProgram(unibrow::CharacterStream* stream);
+  bool PreParseProgram(Handle<String> source, unibrow::CharacterStream* stream);
 
   void ReportMessage(const char* message, Vector<const char*> args);
   virtual void ReportMessageAt(Scanner::Location loc,
@@ -678,6 +678,25 @@ class TemporaryScope BASE_EMBEDDED {
   void set_contains_array_literal() { contains_array_literal_ = true; }
   bool contains_array_literal() { return contains_array_literal_; }
 
+  void SetThisPropertyAssignmentInfo(
+      bool only_this_property_assignments,
+      bool only_simple_this_property_assignments,
+      Handle<FixedArray> this_property_assignments) {
+    only_this_property_assignments_ = only_this_property_assignments;
+    only_simple_this_property_assignments_ =
+        only_simple_this_property_assignments;
+    this_property_assignments_ = this_property_assignments;
+  }
+  bool only_this_property_assignments() {
+    return only_this_property_assignments_;
+  }
+  bool only_simple_this_property_assignments() {
+    return only_simple_this_property_assignments_;
+  }
+  Handle<FixedArray> this_property_assignments() {
+    return this_property_assignments_;
+  }
+
   void AddProperty() { expected_property_count_++; }
   int expected_property_count() { return expected_property_count_; }
  private:
@@ -695,6 +714,10 @@ class TemporaryScope BASE_EMBEDDED {
   // Properties count estimation.
   int expected_property_count_;
 
+  bool only_this_property_assignments_;
+  bool only_simple_this_property_assignments_;
+  Handle<FixedArray> this_property_assignments_;
+
   // Bookkeeping
   Parser* parser_;
   TemporaryScope* parent_;
@@ -707,6 +730,9 @@ TemporaryScope::TemporaryScope(Parser* parser)
   : materialized_literal_count_(0),
     contains_array_literal_(false),
     expected_property_count_(0),
+    only_this_property_assignments_(false),
+    only_simple_this_property_assignments_(false),
+    this_property_assignments_(Factory::empty_fixed_array()),
     parser_(parser),
     parent_(parser->temp_scope_) {
   parser->temp_scope_ = this;
@@ -1167,13 +1193,14 @@ Parser::Parser(Handle<Script> script,
 }
 
 
-bool Parser::PreParseProgram(unibrow::CharacterStream* stream) {
+bool Parser::PreParseProgram(Handle<String> source,
+                             unibrow::CharacterStream* stream) {
   HistogramTimerScope timer(&Counters::pre_parse);
   StackGuard guard;
   AssertNoZoneAllocation assert_no_zone_allocation;
   AssertNoAllocation assert_no_allocation;
   NoHandleAllocation no_handle_allocation;
-  scanner_.Init(Handle<String>(), stream, 0);
+  scanner_.Init(source, stream, 0);
   ASSERT(target_stack_ == NULL);
   mode_ = PARSE_EAGERLY;
   DummyScope top_scope;
@@ -1217,12 +1244,20 @@ FunctionLiteral* Parser::ParseProgram(Handle<String> source,
     bool ok = true;
     ParseSourceElements(&body, Token::EOS, &ok);
     if (ok) {
-      result = NEW(FunctionLiteral(no_name, top_scope_,
-                                   body.elements(),
-                                   temp_scope.materialized_literal_count(),
-                                   temp_scope.contains_array_literal(),
-                                   temp_scope.expected_property_count(),
-                                   0, 0, source->length(), false));
+      result = NEW(FunctionLiteral(
+          no_name,
+          top_scope_,
+          body.elements(),
+          temp_scope.materialized_literal_count(),
+          temp_scope.contains_array_literal(),
+          temp_scope.expected_property_count(),
+          temp_scope.only_this_property_assignments(),
+          temp_scope.only_simple_this_property_assignments(),
+          temp_scope.this_property_assignments(),
+          0,
+          0,
+          source->length(),
+          false));
     } else if (scanner().stack_overflow()) {
       Top::StackOverflow();
     }
@@ -1313,9 +1348,23 @@ void PreParser::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 x.y.z.a = ...; x.y.z.b = ...; etc.
-class InitializationBlockFinder {
+class InitializationBlockFinder : public ParserFinder {
  public:
   InitializationBlockFinder()
     : first_in_block_(NULL), last_in_block_(NULL), block_size_(0) {}
@@ -1340,13 +1389,6 @@ class InitializationBlockFinder {
   }
 
  private:
-  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();
-  }
-
   // Returns true if the expressions appear to denote the same object.
   // In the context of initialization blocks, we only consider expressions
   // of the form 'x.y.z'.
@@ -1417,6 +1459,161 @@ class InitializationBlockFinder {
 };
 
 
+// A ThisNamedPropertyAssigmentFinder 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 ThisNamedPropertyAssigmentFinder : public ParserFinder {
+ public:
+  ThisNamedPropertyAssigmentFinder()
+      : only_this_property_assignments_(true),
+        only_simple_this_property_assignments_(true),
+        names_(NULL),
+        assigned_arguments_(NULL),
+        assigned_constants_(NULL) {}
+
+  void Update(Scope* scope, Statement* stat) {
+    // Bail out if function already has non this property assignment
+    // statements.
+    if (!only_this_property_assignments_) {
+      return;
+    }
+
+    // Check whether this statement is of the form this.x = ...;
+    Assignment* assignment = AsAssignment(stat);
+    if (IsThisPropertyAssignment(assignment)) {
+      HandleThisPropertyAssignment(scope, assignment);
+    } else {
+      only_this_property_assignments_ = false;
+      only_simple_this_property_assignments_ = false;
+    }
+  }
+
+  // Returns whether only statements of the form this.x = ...; was encountered.
+  bool only_this_property_assignments() {
+    return only_this_property_assignments_;
+  }
+
+  // Returns whether only statements of the form this.x = y; where y is either a
+  // constant or a function argument was encountered.
+  bool only_simple_this_property_assignments() {
+    return only_simple_this_property_assignments_;
+  }
+
+  // Returns a fixed array containing three elements for each assignment of the
+  // form this.x = y;
+  Handle<FixedArray> GetThisPropertyAssignments() {
+    if (names_ == NULL) {
+      return Factory::empty_fixed_array();
+    }
+    ASSERT(names_ != NULL);
+    ASSERT(assigned_arguments_ != NULL);
+    ASSERT_EQ(names_->length(), assigned_arguments_->length());
+    ASSERT_EQ(names_->length(), assigned_constants_->length());
+    Handle<FixedArray> assignments =
+        Factory::NewFixedArray(names_->length() * 3);
+    for (int i = 0; i < names_->length(); i++) {
+      assignments->set(i * 3, *names_->at(i));
+      assignments->set(i * 3 + 1, Smi::FromInt(assigned_arguments_->at(i)));
+      assignments->set(i * 3 + 2, *assigned_constants_->at(i));
+    }
+    return assignments;
+  }
+
+ private:
+  bool IsThisPropertyAssignment(Assignment* assignment) {
+    if (assignment != NULL) {
+      Property* property = assignment->target()->AsProperty();
+      return assignment->op() == Token::ASSIGN
+             && property != NULL
+             && property->obj()->AsVariableProxy() != NULL
+             && property->obj()->AsVariableProxy()->is_this();
+    }
+    return false;
+  }
+
+  void HandleThisPropertyAssignment(Scope* scope, Assignment* assignment) {
+    // Check that the property assigned to is a named property.
+    Property* property = assignment->target()->AsProperty();
+    ASSERT(property != NULL);
+    Literal* literal = property->key()->AsLiteral();
+    uint32_t dummy;
+    if (literal != NULL &&
+        literal->handle()->IsString() &&
+        !String::cast(*(literal->handle()))->AsArrayIndex(&dummy)) {
+      Handle<String> key = Handle<String>::cast(literal->handle());
+
+      // Check whether the value assigned is either a constant or matches the
+      // name of one of the arguments to the function.
+      if (assignment->value()->AsLiteral() != NULL) {
+        // Constant assigned.
+        Literal* literal = assignment->value()->AsLiteral();
+        AssignmentFromConstant(key, literal->handle());
+      } else if (assignment->value()->AsVariableProxy() != NULL) {
+        // Variable assigned.
+        Handle<String> name =
+            assignment->value()->AsVariableProxy()->name();
+        // Check whether the variable assigned matches an argument name.
+        int index = -1;
+        for (int i = 0; i < scope->num_parameters(); i++) {
+          if (*scope->parameter(i)->name() == *name) {
+            // Assigned from function argument.
+            index = i;
+            break;
+          }
+        }
+        if (index != -1) {
+          AssignmentFromParameter(key, index);
+        } else {
+          AssignmentFromSomethingElse(key);
+        }
+      } else {
+        AssignmentFromSomethingElse(key);
+      }
+    }
+  }
+
+  void AssignmentFromParameter(Handle<String> name, int index) {
+    EnsureAllocation();
+    names_->Add(name);
+    assigned_arguments_->Add(index);
+    assigned_constants_->Add(Factory::undefined_value());
+  }
+
+  void AssignmentFromConstant(Handle<String> name, Handle<Object> value) {
+    EnsureAllocation();
+    names_->Add(name);
+    assigned_arguments_->Add(-1);
+    assigned_constants_->Add(value);
+  }
+
+  void AssignmentFromSomethingElse(Handle<String> name) {
+    EnsureAllocation();
+    names_->Add(name);
+    assigned_arguments_->Add(-1);
+    assigned_constants_->Add(Factory::undefined_value());
+
+    // The this assignment is not a simple one.
+    only_simple_this_property_assignments_ = false;
+  }
+
+  void EnsureAllocation() {
+    if (names_ == NULL) {
+      ASSERT(assigned_arguments_ == NULL);
+      ASSERT(assigned_constants_ == NULL);
+      names_ = new ZoneStringList(4);
+      assigned_arguments_ = new ZoneList<int>(4);
+      assigned_constants_ = new ZoneObjectList(4);
+    }
+  }
+
+  bool only_this_property_assignments_;
+  bool only_simple_this_property_assignments_;
+  ZoneStringList* names_;
+  ZoneList<int>* assigned_arguments_;
+  ZoneObjectList* assigned_constants_;
+};
+
+
 void* Parser::ParseSourceElements(ZoneListWrapper<Statement>* processor,
                                   int end_token,
                                   bool* ok) {
@@ -1431,15 +1628,33 @@ void* Parser::ParseSourceElements(ZoneListWrapper<Statement>* processor,
 
   ASSERT(processor != NULL);
   InitializationBlockFinder block_finder;
+  ThisNamedPropertyAssigmentFinder this_property_assignment_finder;
   while (peek() != end_token) {
     Statement* stat = ParseStatement(NULL, CHECK_OK);
     if (stat == NULL || stat->IsEmpty()) continue;
     // We find and mark the initialization blocks on top level 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.
-    if (top_scope_->is_global_scope()) block_finder.Update(stat);
+    if (top_scope_->is_global_scope()) {
+      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);
+    }
     processor->Add(stat);
   }
+
+  // Propagate the collected information on this property assignments.
+  if (top_scope_->is_function_scope()) {
+    if (this_property_assignment_finder.only_this_property_assignments()) {
+      temp_scope_->SetThisPropertyAssignmentInfo(
+          this_property_assignment_finder.only_this_property_assignments(),
+          this_property_assignment_finder.
+              only_simple_this_property_assignments(),
+          this_property_assignment_finder.GetThisPropertyAssignments());
+    }
+  }
   return 0;
 }
 
@@ -3506,6 +3721,9 @@ FunctionLiteral* Parser::ParseFunctionLiteral(Handle<String> var_name,
     int materialized_literal_count;
     int expected_property_count;
     bool contains_array_literal;
+    bool only_this_property_assignments;
+    bool only_simple_this_property_assignments;
+    Handle<FixedArray> this_property_assignments;
     if (is_lazily_compiled && pre_data() != NULL) {
       FunctionEntry entry = pre_data()->GetFunctionEnd(start_pos);
       int end_pos = entry.end_pos();
@@ -3513,12 +3731,20 @@ FunctionLiteral* Parser::ParseFunctionLiteral(Handle<String> var_name,
       scanner_.SeekForward(end_pos);
       materialized_literal_count = entry.literal_count();
       expected_property_count = entry.property_count();
+      only_this_property_assignments = false;
+      only_simple_this_property_assignments = false;
+      this_property_assignments = Factory::empty_fixed_array();
       contains_array_literal = entry.contains_array_literal();
     } else {
       ParseSourceElements(&body, Token::RBRACE, CHECK_OK);
       materialized_literal_count = temp_scope.materialized_literal_count();
       expected_property_count = temp_scope.expected_property_count();
       contains_array_literal = temp_scope.contains_array_literal();
+      only_this_property_assignments =
+          temp_scope.only_this_property_assignments();
+      only_simple_this_property_assignments =
+          temp_scope.only_simple_this_property_assignments();
+      this_property_assignments = temp_scope.this_property_assignments();
     }
 
     Expect(Token::RBRACE, CHECK_OK);
@@ -3533,10 +3759,18 @@ FunctionLiteral* Parser::ParseFunctionLiteral(Handle<String> var_name,
     }
 
     FunctionLiteral* function_literal =
-        NEW(FunctionLiteral(name, top_scope_,
-                            body.elements(), materialized_literal_count,
-                            contains_array_literal, expected_property_count,
-                            num_parameters, start_pos, end_pos,
+        NEW(FunctionLiteral(name,
+                            top_scope_,
+                            body.elements(),
+                            materialized_literal_count,
+                            contains_array_literal,
+                            expected_property_count,
+                            only_this_property_assignments,
+                            only_simple_this_property_assignments,
+                            this_property_assignments,
+                            num_parameters,
+                            start_pos,
+                            end_pos,
                             function_name->length() > 0));
     if (!is_pre_parsing_) {
       function_literal->set_function_token_position(function_token_position);
@@ -4593,7 +4827,8 @@ unsigned* ScriptDataImpl::Data() {
 }
 
 
-ScriptDataImpl* PreParse(unibrow::CharacterStream* stream,
+ScriptDataImpl* PreParse(Handle<String> source,
+                         unibrow::CharacterStream* stream,
                          v8::Extension* extension) {
   Handle<Script> no_script;
   bool allow_natives_syntax =
@@ -4601,7 +4836,7 @@ ScriptDataImpl* PreParse(unibrow::CharacterStream* stream,
       FLAG_allow_natives_syntax ||
       Bootstrapper::IsActive();
   PreParser parser(no_script, allow_natives_syntax, extension);
-  if (!parser.PreParseProgram(stream)) return NULL;
+  if (!parser.PreParseProgram(source, stream)) return NULL;
   // The list owns the backing store so we need to clone the vector.
   // That way, the result will be exactly the right size rather than
   // the expected 50% too large.
diff --git a/deps/v8/src/parser.h b/deps/v8/src/parser.h
index c029c4b25d..86e1f74fbe 100644
--- a/deps/v8/src/parser.h
+++ b/deps/v8/src/parser.h
@@ -143,7 +143,8 @@ FunctionLiteral* MakeAST(bool compile_in_global_context,
                          ScriptDataImpl* pre_data);
 
 
-ScriptDataImpl* PreParse(unibrow::CharacterStream* stream,
+ScriptDataImpl* PreParse(Handle<String> source,
+                         unibrow::CharacterStream* stream,
                          v8::Extension* extension);
 
 
diff --git a/deps/v8/src/platform-win32.cc b/deps/v8/src/platform-win32.cc
index 633b2c25a8..0a2d99041b 100644
--- a/deps/v8/src/platform-win32.cc
+++ b/deps/v8/src/platform-win32.cc
@@ -54,6 +54,10 @@
 #define _WIN32_WINNT 0x500
 #endif
 
+#ifdef  _WIN64
+#error Windows 64-bit blatforms not supported
+#endif
+
 #include <windows.h>
 
 #include <time.h>  // For LocalOffset() implementation.
diff --git a/deps/v8/src/regexp-macro-assembler-irregexp.cc b/deps/v8/src/regexp-macro-assembler-irregexp.cc
index eea3c23eae..21b622ef05 100644
--- a/deps/v8/src/regexp-macro-assembler-irregexp.cc
+++ b/deps/v8/src/regexp-macro-assembler-irregexp.cc
@@ -375,37 +375,6 @@ void RegExpMacroAssemblerIrregexp::CheckNotRegistersEqual(int reg1,
 }
 
 
-void RegExpMacroAssemblerIrregexp::CheckBitmap(uc16 start,
-                                           Label* bitmap,
-                                           Label* on_zero) {
-  UNIMPLEMENTED();
-}
-
-
-void RegExpMacroAssemblerIrregexp::DispatchHalfNibbleMap(
-    uc16 start,
-    Label* half_nibble_map,
-    const Vector<Label*>& table) {
-  UNIMPLEMENTED();
-}
-
-
-void RegExpMacroAssemblerIrregexp::DispatchByteMap(
-    uc16 start,
-    Label* byte_map,
-    const Vector<Label*>& table) {
-  UNIMPLEMENTED();
-}
-
-
-void RegExpMacroAssemblerIrregexp::DispatchHighByteMap(
-    byte start,
-    Label* byte_map,
-    const Vector<Label*>& table) {
-  UNIMPLEMENTED();
-}
-
-
 void RegExpMacroAssemblerIrregexp::CheckCharacters(
   Vector<const uc16> str,
   int cp_offset,
diff --git a/deps/v8/src/regexp-macro-assembler-irregexp.h b/deps/v8/src/regexp-macro-assembler-irregexp.h
index 597046c4c3..dd64e7ae83 100644
--- a/deps/v8/src/regexp-macro-assembler-irregexp.h
+++ b/deps/v8/src/regexp-macro-assembler-irregexp.h
@@ -52,7 +52,6 @@ class RegExpMacroAssemblerIrregexp: public RegExpMacroAssembler {
   // The byte-code interpreter checks on each push anyway.
   virtual int stack_limit_slack() { return 1; }
   virtual void Bind(Label* label);
-  virtual void EmitOrLink(Label* label);
   virtual void AdvanceCurrentPosition(int by);  // Signed cp change.
   virtual void PopCurrentPosition();
   virtual void PushCurrentPosition();
@@ -100,16 +99,6 @@ class RegExpMacroAssemblerIrregexp: public RegExpMacroAssembler {
                                int cp_offset,
                                Label* on_failure,
                                bool check_end_of_string);
-  virtual void CheckBitmap(uc16 start, Label* bitmap, Label* on_zero);
-  virtual void DispatchHalfNibbleMap(uc16 start,
-                                     Label* half_nibble_map,
-                                     const Vector<Label*>& destinations);
-  virtual void DispatchByteMap(uc16 start,
-                               Label* byte_map,
-                               const Vector<Label*>& destinations);
-  virtual void DispatchHighByteMap(byte start,
-                                   Label* byte_map,
-                                   const Vector<Label*>& destinations);
   virtual void IfRegisterLT(int register_index, int comparand, Label* if_lt);
   virtual void IfRegisterGE(int register_index, int comparand, Label* if_ge);
   virtual void IfRegisterEqPos(int register_index, Label* if_eq);
@@ -119,6 +108,7 @@ class RegExpMacroAssemblerIrregexp: public RegExpMacroAssembler {
  private:
   void Expand();
   // Code and bitmap emission.
+  inline void EmitOrLink(Label* label);
   inline void Emit32(uint32_t x);
   inline void Emit16(uint32_t x);
   inline void Emit(uint32_t bc, uint32_t arg);
diff --git a/deps/v8/src/regexp-macro-assembler-tracer.cc b/deps/v8/src/regexp-macro-assembler-tracer.cc
index 30eb485e37..0aad337378 100644
--- a/deps/v8/src/regexp-macro-assembler-tracer.cc
+++ b/deps/v8/src/regexp-macro-assembler-tracer.cc
@@ -53,12 +53,6 @@ void RegExpMacroAssemblerTracer::Bind(Label* label) {
 }
 
 
-void RegExpMacroAssemblerTracer::EmitOrLink(Label* label) {
-  PrintF(" EmitOrLink(label[%08x]);\n", label);
-  assembler_->EmitOrLink(label);
-}
-
-
 void RegExpMacroAssemblerTracer::AdvanceCurrentPosition(int by) {
   PrintF(" AdvanceCurrentPosition(by=%d);\n", by);
   assembler_->AdvanceCurrentPosition(by);
@@ -311,13 +305,6 @@ void RegExpMacroAssemblerTracer::CheckCharacters(Vector<const uc16> str,
 }
 
 
-void RegExpMacroAssemblerTracer::CheckBitmap(uc16 start, Label* bitmap,
-                                             Label* on_zero) {
-  PrintF(" CheckBitmap(start=u%04x, <bitmap>, label[%08x]);\n", start, on_zero);
-  assembler_->CheckBitmap(start, bitmap, on_zero);
-}
-
-
 bool RegExpMacroAssemblerTracer::CheckSpecialCharacterClass(
     uc16 type,
     int cp_offset,
@@ -338,51 +325,6 @@ bool RegExpMacroAssemblerTracer::CheckSpecialCharacterClass(
 }
 
 
-void RegExpMacroAssemblerTracer::DispatchHalfNibbleMap(
-    uc16 start,
-    Label* half_nibble_map,
-    const Vector<Label*>& destinations) {
-  PrintF(" DispatchHalfNibbleMap(start=u%04x, <half_nibble_map>, [", start);
-  for (int i = 0; i < destinations.length(); i++) {
-    if (i > 0)
-      PrintF(", ");
-    PrintF("label[%08x]", destinations[i]);
-  }
-  PrintF(");\n");
-  assembler_->DispatchHalfNibbleMap(start, half_nibble_map, destinations);
-}
-
-
-void RegExpMacroAssemblerTracer::DispatchByteMap(
-    uc16 start,
-    Label* byte_map,
-    const Vector<Label*>& destinations) {
-  PrintF(" DispatchByteMap(start=u%04x, <byte_map>, [", start);
-  for (int i = 0; i < destinations.length(); i++) {
-    if (i > 0)
-      PrintF(", ");
-    PrintF("label[%08x]", destinations[i]);
-  }
-  PrintF(");\n");
-  assembler_->DispatchByteMap(start, byte_map, destinations);
-}
-
-
-void RegExpMacroAssemblerTracer::DispatchHighByteMap(
-    byte start,
-    Label* byte_map,
-    const Vector<Label*>& destinations) {
-  PrintF(" DispatchHighByteMap(start=u%04x, <byte_map>, [", start);
-  for (int i = 0; i < destinations.length(); i++) {
-    if (i > 0)
-      PrintF(", ");
-    PrintF("label[%08x]", destinations[i]);
-  }
-  PrintF(");\n");
-  assembler_->DispatchHighByteMap(start, byte_map, destinations);
-}
-
-
 void RegExpMacroAssemblerTracer::IfRegisterLT(int register_index,
                                               int comparand, Label* if_lt) {
   PrintF(" IfRegisterLT(register=%d, number=%d, label[%08x]);\n",
diff --git a/deps/v8/src/regexp-macro-assembler-tracer.h b/deps/v8/src/regexp-macro-assembler-tracer.h
index 0fd73f3d6f..28434d7cab 100644
--- a/deps/v8/src/regexp-macro-assembler-tracer.h
+++ b/deps/v8/src/regexp-macro-assembler-tracer.h
@@ -43,7 +43,6 @@ class RegExpMacroAssemblerTracer: public RegExpMacroAssembler {
   virtual void Backtrack();
   virtual void Bind(Label* label);
   virtual void CheckAtStart(Label* on_at_start);
-  virtual void CheckBitmap(uc16 start, Label* bitmap, Label* on_zero);
   virtual void CheckCharacter(uint32_t c, Label* on_equal);
   virtual void CheckCharacterAfterAnd(uint32_t c,
                                       uint32_t and_with,
@@ -73,19 +72,6 @@ class RegExpMacroAssemblerTracer: public RegExpMacroAssembler {
                                           int cp_offset,
                                           bool check_offset,
                                           Label* on_no_match);
-  virtual void DispatchByteMap(
-      uc16 start,
-      Label* byte_map,
-      const Vector<Label*>& destinations);
-  virtual void DispatchHalfNibbleMap(
-      uc16 start,
-      Label* half_nibble_map,
-      const Vector<Label*>& destinations);
-  virtual void DispatchHighByteMap(
-      byte start,
-      Label* byte_map,
-      const Vector<Label*>& destinations);
-  virtual void EmitOrLink(Label* label);
   virtual void Fail();
   virtual Handle<Object> GetCode(Handle<String> source);
   virtual void GoTo(Label* label);
diff --git a/deps/v8/src/regexp-macro-assembler.cc b/deps/v8/src/regexp-macro-assembler.cc
index 8dede304eb..7f830fe485 100644
--- a/deps/v8/src/regexp-macro-assembler.cc
+++ b/deps/v8/src/regexp-macro-assembler.cc
@@ -25,10 +25,10 @@
 // (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 <string.h>
 #include "v8.h"
 #include "ast.h"
 #include "assembler.h"
+#include "regexp-stack.h"
 #include "regexp-macro-assembler.h"
 
 namespace v8 {
@@ -42,38 +42,176 @@ RegExpMacroAssembler::~RegExpMacroAssembler() {
 }
 
 
-ByteArrayProvider::ByteArrayProvider(unsigned int initial_size)
-  : byte_array_size_(initial_size),
-    current_byte_array_(),
-    current_byte_array_free_offset_(initial_size) {}
+#ifdef V8_NATIVE_REGEXP  // Avoid unused code, e.g., on ARM.
+
+NativeRegExpMacroAssembler::NativeRegExpMacroAssembler() {
+}
 
 
-ArraySlice ByteArrayProvider::GetBuffer(unsigned int size,
-                                        unsigned int elem_size) {
-  ASSERT(size > 0);
-  size_t byte_size = size * elem_size;
-  int free_offset = current_byte_array_free_offset_;
-  // align elements
-  free_offset += elem_size - 1;
-  free_offset = free_offset - (free_offset % elem_size);
+NativeRegExpMacroAssembler::~NativeRegExpMacroAssembler() {
+}
 
-  if (free_offset + byte_size > byte_array_size_) {
-    if (byte_size > (byte_array_size_ / 2)) {
-      Handle<ByteArray> solo_buffer(Factory::NewByteArray(byte_size, TENURED));
-      return ArraySlice(solo_buffer, 0);
+const byte* NativeRegExpMacroAssembler::StringCharacterPosition(
+    String* subject,
+    int start_index) {
+  // Not just flat, but ultra flat.
+  ASSERT(subject->IsExternalString() || subject->IsSeqString());
+  ASSERT(start_index >= 0);
+  ASSERT(start_index <= subject->length());
+  if (subject->IsAsciiRepresentation()) {
+    const byte* address;
+    if (StringShape(subject).IsExternal()) {
+      const char* data = ExternalAsciiString::cast(subject)->resource()->data();
+      address = reinterpret_cast<const byte*>(data);
+    } else {
+      ASSERT(subject->IsSeqAsciiString());
+      char* data = SeqAsciiString::cast(subject)->GetChars();
+      address = reinterpret_cast<const byte*>(data);
     }
-    current_byte_array_ = Factory::NewByteArray(byte_array_size_, TENURED);
-    free_offset = 0;
+    return address + start_index;
+  }
+  const uc16* data;
+  if (StringShape(subject).IsExternal()) {
+    data = ExternalTwoByteString::cast(subject)->resource()->data();
+  } else {
+    ASSERT(subject->IsSeqTwoByteString());
+    data = SeqTwoByteString::cast(subject)->GetChars();
   }
-  current_byte_array_free_offset_ = free_offset + byte_size;
-  return ArraySlice(current_byte_array_, free_offset);
+  return reinterpret_cast<const byte*>(data + start_index);
 }
 
 
-template <typename T>
-ArraySlice ByteArrayProvider::GetBuffer(Vector<T> values) {
-  ArraySlice slice = GetBuffer(values.length(), sizeof(T));
-  memcpy(slice.location(), values.start(), values.length() * sizeof(T));
-  return slice;
+NativeRegExpMacroAssembler::Result NativeRegExpMacroAssembler::Match(
+    Handle<Code> regexp_code,
+    Handle<String> subject,
+    int* offsets_vector,
+    int offsets_vector_length,
+    int previous_index) {
+
+  ASSERT(subject->IsFlat());
+  ASSERT(previous_index >= 0);
+  ASSERT(previous_index <= subject->length());
+
+  // No allocations before calling the regexp, but we can't use
+  // AssertNoAllocation, since regexps might be preempted, and another thread
+  // might do allocation anyway.
+
+  String* subject_ptr = *subject;
+  // Character offsets into string.
+  int start_offset = previous_index;
+  int end_offset = subject_ptr->length();
+
+  bool is_ascii = subject->IsAsciiRepresentation();
+
+  if (StringShape(subject_ptr).IsCons()) {
+    subject_ptr = ConsString::cast(subject_ptr)->first();
+  } else if (StringShape(subject_ptr).IsSliced()) {
+    SlicedString* slice = SlicedString::cast(subject_ptr);
+    start_offset += slice->start();
+    end_offset += slice->start();
+    subject_ptr = slice->buffer();
+  }
+  // Ensure that an underlying string has the same ascii-ness.
+  ASSERT(subject_ptr->IsAsciiRepresentation() == is_ascii);
+  ASSERT(subject_ptr->IsExternalString() || subject_ptr->IsSeqString());
+  // String is now either Sequential or External
+  int char_size_shift = is_ascii ? 0 : 1;
+  int char_length = end_offset - start_offset;
+
+  const byte* input_start =
+      StringCharacterPosition(subject_ptr, start_offset);
+  int byte_length = char_length << char_size_shift;
+  const byte* input_end = input_start + byte_length;
+  Result res = Execute(*regexp_code,
+                       subject_ptr,
+                       start_offset,
+                       input_start,
+                       input_end,
+                       offsets_vector,
+                       previous_index == 0);
+
+  if (res == SUCCESS) {
+    // Capture values are relative to start_offset only.
+    // Convert them to be relative to start of string.
+    for (int i = 0; i < offsets_vector_length; i++) {
+      if (offsets_vector[i] >= 0) {
+        offsets_vector[i] += previous_index;
+      }
+    }
+  }
+
+  return res;
 }
+
+
+NativeRegExpMacroAssembler::Result NativeRegExpMacroAssembler::Execute(
+    Code* code,
+    String* input,
+    int start_offset,
+    const byte* input_start,
+    const byte* input_end,
+    int* output,
+    bool at_start) {
+  typedef int (*matcher)(String*, int, const byte*,
+                         const byte*, int*, int, Address);
+  matcher matcher_func = FUNCTION_CAST<matcher>(code->entry());
+
+  int at_start_val = at_start ? 1 : 0;
+
+  // Ensure that the minimum stack has been allocated.
+  RegExpStack stack;
+  Address stack_base = RegExpStack::stack_base();
+
+  int result = matcher_func(input,
+                            start_offset,
+                            input_start,
+                            input_end,
+                            output,
+                            at_start_val,
+                            stack_base);
+  ASSERT(result <= SUCCESS);
+  ASSERT(result >= RETRY);
+
+  if (result == EXCEPTION && !Top::has_pending_exception()) {
+    // We detected a stack overflow (on the backtrack stack) in RegExp code,
+    // but haven't created the exception yet.
+    Top::StackOverflow();
+  }
+  return static_cast<Result>(result);
+}
+
+
+static unibrow::Mapping<unibrow::Ecma262Canonicalize> canonicalize;
+
+int NativeRegExpMacroAssembler::CaseInsensitiveCompareUC16(
+    Address byte_offset1,
+    Address byte_offset2,
+    size_t byte_length) {
+  // This function is not allowed to cause a garbage collection.
+  // A GC might move the calling generated code and invalidate the
+  // return address on the stack.
+  ASSERT(byte_length % 2 == 0);
+  uc16* substring1 = reinterpret_cast<uc16*>(byte_offset1);
+  uc16* substring2 = reinterpret_cast<uc16*>(byte_offset2);
+  size_t length = byte_length >> 1;
+
+  for (size_t i = 0; i < length; i++) {
+    unibrow::uchar c1 = substring1[i];
+    unibrow::uchar c2 = substring2[i];
+    if (c1 != c2) {
+      unibrow::uchar s1[1] = { c1 };
+      canonicalize.get(c1, '\0', s1);
+      if (s1[0] != c2) {
+        unibrow::uchar s2[1] = { c2 };
+        canonicalize.get(c2, '\0', s2);
+        if (s1[0] != s2[0]) {
+          return 0;
+        }
+      }
+    }
+  }
+  return 1;
+}
+
+#endif  // V8_NATIVE_REGEXP
 } }  // namespace v8::internal
diff --git a/deps/v8/src/regexp-macro-assembler.h b/deps/v8/src/regexp-macro-assembler.h
index 484986428b..e59082768a 100644
--- a/deps/v8/src/regexp-macro-assembler.h
+++ b/deps/v8/src/regexp-macro-assembler.h
@@ -46,6 +46,7 @@ class RegExpMacroAssembler {
   enum IrregexpImplementation {
     kIA32Implementation,
     kARMImplementation,
+    kX64Implementation,
     kBytecodeImplementation
   };
 
@@ -67,12 +68,6 @@ class RegExpMacroAssembler {
   virtual void Backtrack() = 0;
   virtual void Bind(Label* label) = 0;
   virtual void CheckAtStart(Label* on_at_start) = 0;
-  // Check the current character against a bitmap.  The range of the current
-  // character must be from start to start + length_of_bitmap_in_bits.
-  virtual void CheckBitmap(
-      uc16 start,           // The bitmap is indexed from this character.
-      Label* bitmap,        // Where the bitmap is emitted.
-      Label* on_zero) = 0;  // Where to go if the bit is 0.  Fall through on 1.
   // Dispatch after looking the current character up in a 2-bits-per-entry
   // map.  The destinations vector has up to 4 labels.
   virtual void CheckCharacter(uint32_t c, Label* on_equal) = 0;
@@ -132,23 +127,6 @@ class RegExpMacroAssembler {
                                           Label* on_no_match) {
     return false;
   }
-  // Dispatch after looking the current character up in a byte map.  The
-  // destinations vector has up to 256 labels.
-  virtual void DispatchByteMap(
-      uc16 start,
-      Label* byte_map,
-      const Vector<Label*>& destinations) = 0;
-  virtual void DispatchHalfNibbleMap(
-      uc16 start,
-      Label* half_nibble_map,
-      const Vector<Label*>& destinations) = 0;
-  // Dispatch after looking the high byte of the current character up in a byte
-  // map.  The destinations vector has up to 256 labels.
-  virtual void DispatchHighByteMap(
-      byte start,
-      Label* byte_map,
-      const Vector<Label*>& destinations) = 0;
-  virtual void EmitOrLink(Label* label) = 0;
   virtual void Fail() = 0;
   virtual Handle<Object> GetCode(Handle<String> source) = 0;
   virtual void GoTo(Label* label) = 0;
@@ -181,51 +159,53 @@ class RegExpMacroAssembler {
   virtual void WriteCurrentPositionToRegister(int reg, int cp_offset) = 0;
   virtual void ClearRegisters(int reg_from, int reg_to) = 0;
   virtual void WriteStackPointerToRegister(int reg) = 0;
-
- private:
 };
 
 
-struct ArraySlice {
+#ifdef V8_NATIVE_REGEXP  // Avoid compiling unused code.
+
+class NativeRegExpMacroAssembler: public RegExpMacroAssembler {
  public:
-  ArraySlice(Handle<ByteArray> array, size_t offset)
-    : array_(array), offset_(offset) {}
-  Handle<ByteArray> array() { return array_; }
-  // Offset in the byte array data.
-  size_t offset() { return offset_; }
-  // Offset from the ByteArray pointer.
-  size_t base_offset() {
-    return ByteArray::kHeaderSize - kHeapObjectTag + offset_;
-  }
-  void* location() {
-    return reinterpret_cast<void*>(array_->GetDataStartAddress() + offset_);
-  }
-  template <typename T>
-  T& at(int idx) {
-    return reinterpret_cast<T*>(array_->GetDataStartAddress() + offset_)[idx];
-  }
- private:
-  Handle<ByteArray> array_;
-  size_t offset_;
-};
+  // Type of input string to generate code for.
+  enum Mode { ASCII = 1, UC16 = 2 };
 
+  // Result of calling generated native RegExp code.
+  // RETRY: Something significant changed during execution, and the matching
+  //        should be retried from scratch.
+  // EXCEPTION: Something failed during execution. If no exception has been
+  //        thrown, it's an internal out-of-memory, and the caller should
+  //        throw the exception.
+  // FAILURE: Matching failed.
+  // SUCCESS: Matching succeeded, and the output array has been filled with
+  //        capture positions.
+  enum Result { RETRY = -2, EXCEPTION = -1, FAILURE = 0, SUCCESS = 1 };
 
-class ByteArrayProvider {
- public:
-  explicit ByteArrayProvider(unsigned int initial_size);
-  // Provides a place to put "size" elements of size "element_size".
-  // The information can be stored in the provided ByteArray at the "offset".
-  // The offset is aligned to the element size.
-  ArraySlice GetBuffer(unsigned int size,
-                       unsigned int element_size);
-  template <typename T>
-  ArraySlice GetBuffer(Vector<T> values);
- private:
-  size_t byte_array_size_;
-  Handle<ByteArray> current_byte_array_;
-  int current_byte_array_free_offset_;
-};
+  NativeRegExpMacroAssembler();
+  virtual ~NativeRegExpMacroAssembler();
+
+  static Result Match(Handle<Code> regexp,
+                      Handle<String> subject,
+                      int* offsets_vector,
+                      int offsets_vector_length,
+                      int previous_index);
 
+  // Compares two-byte strings case insensitively.
+  // Called from generated RegExp code.
+  static int CaseInsensitiveCompareUC16(Address byte_offset1,
+                                        Address byte_offset2,
+                                        size_t byte_length);
+
+  static const byte* StringCharacterPosition(String* subject, int start_index);
+
+  static Result Execute(Code* code,
+                        String* input,
+                        int start_offset,
+                        const byte* input_start,
+                        const byte* input_end,
+                        int* output,
+                        bool at_start);
+};
+#endif  // V8_NATIVE_REGEXP
 } }  // namespace v8::internal
 
 #endif  // V8_REGEXP_MACRO_ASSEMBLER_H_
diff --git a/deps/v8/src/regexp-stack.h b/deps/v8/src/regexp-stack.h
index 6c090daa65..99cf33cd32 100644
--- a/deps/v8/src/regexp-stack.h
+++ b/deps/v8/src/regexp-stack.h
@@ -48,7 +48,7 @@ class RegExpStack {
   ~RegExpStack();  // Releases the stack if it has grown.
 
   // Gives the top of the memory used as stack.
-  static Address stack_top() {
+  static Address stack_base() {
     ASSERT(thread_local_.memory_size_ != 0);
     return thread_local_.memory_ + thread_local_.memory_size_;
   }
@@ -74,7 +74,7 @@ class RegExpStack {
 
  private:
   // Artificial limit used when no memory has been allocated.
-  static const uint32_t kMemoryTop = 0xffffffff;
+  static const uintptr_t kMemoryTop = static_cast<uintptr_t>(-1);
 
   // Minimal size of allocated stack area.
   static const size_t kMinimumStackSize = 1 * KB;
diff --git a/deps/v8/src/runtime.cc b/deps/v8/src/runtime.cc
index 0da4be8216..b3e8aa477d 100644
--- a/deps/v8/src/runtime.cc
+++ b/deps/v8/src/runtime.cc
@@ -1022,6 +1022,30 @@ static Object* Runtime_InitializeConstContextSlot(Arguments args) {
 }
 
 
+static Object* Runtime_OptimizeObjectForAddingMultipleProperties(
+    Arguments args) {
+  HandleScope scope;
+  ASSERT(args.length() == 2);
+  CONVERT_ARG_CHECKED(JSObject, object, 0);
+  CONVERT_SMI_CHECKED(properties, args[1]);
+  if (object->HasFastProperties()) {
+    NormalizeProperties(object, KEEP_INOBJECT_PROPERTIES, properties);
+  }
+  return *object;
+}
+
+
+static Object* Runtime_TransformToFastProperties(Arguments args) {
+  HandleScope scope;
+  ASSERT(args.length() == 1);
+  CONVERT_ARG_CHECKED(JSObject, object, 0);
+  if (!object->HasFastProperties() && !object->IsGlobalObject()) {
+    TransformToFastProperties(object, 0);
+  }
+  return *object;
+}
+
+
 static Object* Runtime_RegExpExec(Arguments args) {
   HandleScope scope;
   ASSERT(args.length() == 4);
@@ -3075,7 +3099,7 @@ static Object* Runtime_Typeof(Arguments args) {
       }
       ASSERT(heap_obj->IsUndefined());
       return Heap::undefined_symbol();
-    case JS_FUNCTION_TYPE:
+    case JS_FUNCTION_TYPE: case JS_REGEXP_TYPE:
       return Heap::function_symbol();
     default:
       // For any kind of object not handled above, the spec rule for
@@ -4356,6 +4380,8 @@ static Object* Runtime_NewObject(Arguments args) {
     Handle<Code> stub = ComputeConstructStub(map);
     function->shared()->set_construct_stub(*stub);
   }
+  Counters::constructed_objects.Increment();
+  Counters::constructed_objects_runtime.Increment();
   return *result;
 }
 
diff --git a/deps/v8/src/runtime.h b/deps/v8/src/runtime.h
index cdf21dcabf..d47ca18e79 100644
--- a/deps/v8/src/runtime.h
+++ b/deps/v8/src/runtime.h
@@ -247,6 +247,8 @@ namespace internal {
   F(InitializeVarGlobal, -1 /* 1 or 2 */) \
   F(InitializeConstGlobal, 2) \
   F(InitializeConstContextSlot, 3) \
+  F(OptimizeObjectForAddingMultipleProperties, 2) \
+  F(TransformToFastProperties, 1) \
   \
   /* Debugging */ \
   F(DebugPrint, 1) \
diff --git a/deps/v8/src/scanner.cc b/deps/v8/src/scanner.cc
index 24a6d4be9c..720dc3536c 100644
--- a/deps/v8/src/scanner.cc
+++ b/deps/v8/src/scanner.cc
@@ -92,33 +92,35 @@ void UTF8Buffer::AddCharSlow(uc32 c) {
 
 
 UTF16Buffer::UTF16Buffer()
-  : pos_(0),
-    pushback_buffer_(0),
-    last_(0),
-    stream_(NULL) { }
+    : pos_(0), size_(0) { }
 
 
-void UTF16Buffer::Initialize(Handle<String> data,
-                             unibrow::CharacterStream* input) {
-  data_ = data;
-  pos_ = 0;
-  stream_ = input;
+Handle<String> UTF16Buffer::SubString(int start, int end) {
+  return internal::SubString(data_, start, end);
 }
 
 
-Handle<String> UTF16Buffer::SubString(int start, int end) {
-  return internal::SubString(data_, start, end);
+// CharacterStreamUTF16Buffer
+CharacterStreamUTF16Buffer::CharacterStreamUTF16Buffer()
+    : pushback_buffer_(0), last_(0), stream_(NULL) { }
+
+
+void CharacterStreamUTF16Buffer::Initialize(Handle<String> data,
+                                            unibrow::CharacterStream* input) {
+  data_ = data;
+  pos_ = 0;
+  stream_ = input;
 }
 
 
-void UTF16Buffer::PushBack(uc32 ch) {
+void CharacterStreamUTF16Buffer::PushBack(uc32 ch) {
   pushback_buffer()->Add(last_);
   last_ = ch;
   pos_--;
 }
 
 
-uc32 UTF16Buffer::Advance() {
+uc32 CharacterStreamUTF16Buffer::Advance() {
   // NOTE: It is of importance to Persian / Farsi resources that we do
   // *not* strip format control characters in the scanner; see
   //
@@ -135,7 +137,7 @@ uc32 UTF16Buffer::Advance() {
     uc32 next = stream_->GetNext();
     return last_ = next;
   } else {
-    // note: currently the following increment is necessary to avoid a
+    // Note: currently the following increment is necessary to avoid a
     // test-parser problem!
     pos_++;
     return last_ = static_cast<uc32>(-1);
@@ -143,13 +145,53 @@ uc32 UTF16Buffer::Advance() {
 }
 
 
-void UTF16Buffer::SeekForward(int pos) {
+void CharacterStreamUTF16Buffer::SeekForward(int pos) {
   pos_ = pos;
   ASSERT(pushback_buffer()->is_empty());
   stream_->Seek(pos);
 }
 
 
+// TwoByteStringUTF16Buffer
+TwoByteStringUTF16Buffer::TwoByteStringUTF16Buffer()
+    : raw_data_(NULL) { }
+
+
+void TwoByteStringUTF16Buffer::Initialize(
+     Handle<ExternalTwoByteString> data) {
+  ASSERT(!data.is_null());
+
+  data_ = data;
+  pos_ = 0;
+
+  raw_data_ = data->resource()->data();
+  size_ = data->length();
+}
+
+
+uc32 TwoByteStringUTF16Buffer::Advance() {
+  if (pos_ < size_) {
+    return raw_data_[pos_++];
+  } else {
+    // note: currently the following increment is necessary to avoid a
+    // test-parser problem!
+    pos_++;
+    return static_cast<uc32>(-1);
+  }
+}
+
+
+void TwoByteStringUTF16Buffer::PushBack(uc32 ch) {
+  pos_--;
+  ASSERT(pos_ >= 0 && raw_data_[pos_] == ch);
+}
+
+
+void TwoByteStringUTF16Buffer::SeekForward(int pos) {
+  pos_ = pos;
+}
+
+
 // ----------------------------------------------------------------------------
 // Scanner
 
@@ -161,7 +203,15 @@ Scanner::Scanner(bool pre) : stack_overflow_(false), is_pre_parsing_(pre) {
 void Scanner::Init(Handle<String> source, unibrow::CharacterStream* stream,
     int position) {
   // Initialize the source buffer.
-  source_.Initialize(source, stream);
+  if (!source.is_null() && StringShape(*source).IsExternalTwoByte()) {
+    two_byte_string_buffer_.Initialize(
+        Handle<ExternalTwoByteString>::cast(source));
+    source_ = &two_byte_string_buffer_;
+  } else {
+    char_stream_buffer_.Initialize(source, stream);
+    source_ = &char_stream_buffer_;
+  }
+
   position_ = position;
 
   // Reset literals buffer
@@ -180,7 +230,7 @@ void Scanner::Init(Handle<String> source, unibrow::CharacterStream* stream,
 
 
 Handle<String> Scanner::SubString(int start, int end) {
-  return source_.SubString(start - position_, end - position_);
+  return source_->SubString(start - position_, end - position_);
 }
 
 
@@ -223,17 +273,6 @@ void Scanner::AddCharAdvance() {
 }
 
 
-void Scanner::Advance() {
-  c0_ = source_.Advance();
-}
-
-
-void Scanner::PushBack(uc32 ch) {
-  source_.PushBack(ch);
-  c0_ = ch;
-}
-
-
 static inline bool IsByteOrderMark(uc32 c) {
   // The Unicode value U+FFFE is guaranteed never to be assigned as a
   // Unicode character; this implies that in a Unicode context the
@@ -583,7 +622,7 @@ void Scanner::Scan() {
 
 
 void Scanner::SeekForward(int pos) {
-  source_.SeekForward(pos - 1);
+  source_->SeekForward(pos - 1);
   Advance();
   Scan();
 }
diff --git a/deps/v8/src/scanner.h b/deps/v8/src/scanner.h
index eea23a70c2..340da86ed7 100644
--- a/deps/v8/src/scanner.h
+++ b/deps/v8/src/scanner.h
@@ -73,24 +73,53 @@ class UTF8Buffer {
 class UTF16Buffer {
  public:
   UTF16Buffer();
+  virtual ~UTF16Buffer() {}
+
+  virtual void PushBack(uc32 ch) = 0;
+  // returns a value < 0 when the buffer end is reached
+  virtual uc32 Advance() = 0;
+  virtual void SeekForward(int pos) = 0;
 
-  void Initialize(Handle<String> data, unibrow::CharacterStream* stream);
-  void PushBack(uc32 ch);
-  uc32 Advance();  // returns a value < 0 when the buffer end is reached
-  uint16_t CharAt(int index);
   int pos() const { return pos_; }
   int size() const { return size_; }
   Handle<String> SubString(int start, int end);
-  List<uc32>* pushback_buffer() { return &pushback_buffer_; }
-  void SeekForward(int pos);
 
- private:
+ protected:
   Handle<String> data_;
   int pos_;
   int size_;
+};
+
+
+class CharacterStreamUTF16Buffer: public UTF16Buffer {
+ public:
+  CharacterStreamUTF16Buffer();
+  virtual ~CharacterStreamUTF16Buffer() {}
+  void Initialize(Handle<String> data, unibrow::CharacterStream* stream);
+  virtual void PushBack(uc32 ch);
+  virtual uc32 Advance();
+  virtual void SeekForward(int pos);
+
+ private:
   List<uc32> pushback_buffer_;
   uc32 last_;
   unibrow::CharacterStream* stream_;
+
+  List<uc32>* pushback_buffer() { return &pushback_buffer_; }
+};
+
+
+class TwoByteStringUTF16Buffer: public UTF16Buffer {
+ public:
+  TwoByteStringUTF16Buffer();
+  virtual ~TwoByteStringUTF16Buffer() {}
+  void Initialize(Handle<ExternalTwoByteString> data);
+  virtual void PushBack(uc32 ch);
+  virtual uc32 Advance();
+  virtual void SeekForward(int pos);
+
+ private:
+  const uint16_t* raw_data_;
 };
 
 
@@ -184,8 +213,11 @@ class Scanner {
   static unibrow::Predicate<unibrow::WhiteSpace, 128> kIsWhiteSpace;
 
  private:
+  CharacterStreamUTF16Buffer char_stream_buffer_;
+  TwoByteStringUTF16Buffer two_byte_string_buffer_;
+
   // Source.
-  UTF16Buffer source_;
+  UTF16Buffer* source_;
   int position_;
 
   // Buffer to hold literal values (identifiers, strings, numbers)
@@ -219,8 +251,11 @@ class Scanner {
   void TerminateLiteral();
 
   // Low-level scanning support.
-  void Advance();
-  void PushBack(uc32 ch);
+  void Advance() { c0_ = source_->Advance(); }
+  void PushBack(uc32 ch) {
+    source_->PushBack(ch);
+    c0_ = ch;
+  }
 
   bool SkipWhiteSpace();
   Token::Value SkipSingleLineComment();
@@ -243,7 +278,7 @@ class Scanner {
 
   // Return the current source position.
   int source_pos() {
-    return source_.pos() - kCharacterLookaheadBufferSize + position_;
+    return source_->pos() - kCharacterLookaheadBufferSize + position_;
   }
 
   // Decodes a unicode escape-sequence which is part of an identifier.
diff --git a/deps/v8/src/scopes.cc b/deps/v8/src/scopes.cc
index 78ed035180..25873fac1d 100644
--- a/deps/v8/src/scopes.cc
+++ b/deps/v8/src/scopes.cc
@@ -108,14 +108,31 @@ Variable* VariableMap::Lookup(Handle<String> name) {
 
 
 // Dummy constructor
-Scope::Scope()
-  : inner_scopes_(0),
+Scope::Scope(Type type)
+  : outer_scope_(NULL),
+    inner_scopes_(0),
+    type_(type),
+    scope_name_(Factory::empty_symbol()),
     variables_(false),
     temps_(0),
     params_(0),
     dynamics_(NULL),
     unresolved_(0),
-    decls_(0) {
+    decls_(0),
+    receiver_(NULL),
+    function_(NULL),
+    arguments_(NULL),
+    arguments_shadow_(NULL),
+    illegal_redecl_(NULL),
+    scope_inside_with_(false),
+    scope_contains_with_(false),
+    scope_calls_eval_(false),
+    outer_scope_calls_eval_(false),
+    inner_scope_calls_eval_(false),
+    outer_scope_is_eval_scope_(false),
+    force_eager_compilation_(false),
+    num_stack_slots_(0),
+    num_heap_slots_(0) {
 }
 
 
diff --git a/deps/v8/src/scopes.h b/deps/v8/src/scopes.h
index 5767d9f017..fc627df619 100644
--- a/deps/v8/src/scopes.h
+++ b/deps/v8/src/scopes.h
@@ -93,7 +93,6 @@ class Scope: public ZoneObject {
     GLOBAL_SCOPE    // the top-level scope for a program or a top-level eval
   };
 
-  Scope();
   Scope(Scope* outer_scope, Type type);
 
   virtual ~Scope() { }
@@ -130,7 +129,7 @@ class Scope: public ZoneObject {
   Variable* DeclareGlobal(Handle<String> name);
 
   // Add a parameter to the parameter list. The parameter must have been
-  // declared via Declare. The same parameter may occur more then once in
+  // declared via Declare. The same parameter may occur more than once in
   // the parameter list; they must be added in source order, from left to
   // right.
   void AddParameter(Variable* var);
@@ -286,6 +285,8 @@ class Scope: public ZoneObject {
  protected:
   friend class ParserFactory;
 
+  explicit Scope(Type type);
+
   // Scope tree.
   Scope* outer_scope_;  // the immediately enclosing outer scope, or NULL
   ZoneList<Scope*> inner_scopes_;  // the immediately enclosed inner scopes
@@ -375,7 +376,7 @@ class Scope: public ZoneObject {
 
 class DummyScope : public Scope {
  public:
-  DummyScope() {
+  DummyScope() : Scope(GLOBAL_SCOPE) {
     outer_scope_ = this;
   }
 
diff --git a/deps/v8/src/spaces.cc b/deps/v8/src/spaces.cc
index 9f266cb0ea..9227a87f3c 100644
--- a/deps/v8/src/spaces.cc
+++ b/deps/v8/src/spaces.cc
@@ -726,47 +726,25 @@ void PagedSpace::Shrink() {
   Page* top_page = AllocationTopPage();
   ASSERT(top_page->is_valid());
 
-  // Loop over the pages from the top page to the end of the space to count
-  // the number of pages to keep and find the last page to keep.
-  int free_pages = 0;
-  int pages_to_keep = 0;  // Of the free pages.
-  Page* last_page_to_keep = top_page;
-  Page* current_page = top_page->next_page();
-  // Loop over the pages to the end of the space.
-  while (current_page->is_valid()) {
-#if defined(ANDROID)
-    // Free all chunks if possible
-#else
-    // Advance last_page_to_keep every other step to end up at the midpoint.
-    if ((free_pages & 0x1) == 1) {
-      pages_to_keep++;
-      last_page_to_keep = last_page_to_keep->next_page();
-    }
-#endif
-    free_pages++;
-    current_page = current_page->next_page();
+  // Count the number of pages we would like to free.
+  int pages_to_free = 0;
+  for (Page* p = top_page->next_page(); p->is_valid(); p = p->next_page()) {
+    pages_to_free++;
   }
 
-  // Free pages after last_page_to_keep, and adjust the next_page link.
-  Page* p = MemoryAllocator::FreePages(last_page_to_keep->next_page());
-  MemoryAllocator::SetNextPage(last_page_to_keep, p);
+  // Free pages after top_page.
+  Page* p = MemoryAllocator::FreePages(top_page->next_page());
+  MemoryAllocator::SetNextPage(top_page, p);
 
-  // Since pages are only freed in whole chunks, we may have kept more
-  // than pages_to_keep.  Count the extra pages and cache the new last
-  // page in the space.
-  last_page_ = last_page_to_keep;
-  while (p->is_valid()) {
-    pages_to_keep++;
+  // Find out how many pages we failed to free and update last_page_.
+  // Please note pages can only be freed in whole chunks.
+  last_page_ = top_page;
+  for (Page* p = top_page->next_page(); p->is_valid(); p = p->next_page()) {
+    pages_to_free--;
     last_page_ = p;
-    p = p->next_page();
   }
 
-  // The difference between free_pages and pages_to_keep is the number of
-  // pages actually freed.
-  ASSERT(pages_to_keep <= free_pages);
-  int bytes_freed = (free_pages - pages_to_keep) * Page::kObjectAreaSize;
-  accounting_stats_.ShrinkSpace(bytes_freed);
-
+  accounting_stats_.ShrinkSpace(pages_to_free * Page::kObjectAreaSize);
   ASSERT(Capacity() == CountTotalPages() * Page::kObjectAreaSize);
 }
 
@@ -884,8 +862,6 @@ bool NewSpace::Setup(Address start, int size) {
 
   ASSERT(initial_semispace_capacity <= maximum_semispace_capacity);
   ASSERT(IsPowerOf2(maximum_semispace_capacity));
-  maximum_capacity_ = maximum_semispace_capacity;
-  capacity_ = initial_semispace_capacity;
 
   // Allocate and setup the histogram arrays if necessary.
 #if defined(DEBUG) || defined(ENABLE_LOGGING_AND_PROFILING)
@@ -898,15 +874,17 @@ bool NewSpace::Setup(Address start, int size) {
 #undef SET_NAME
 #endif
 
-  ASSERT(size == 2 * maximum_capacity_);
+  ASSERT(size == 2 * maximum_semispace_capacity);
   ASSERT(IsAddressAligned(start, size, 0));
 
-  if (!to_space_.Setup(start, capacity_, maximum_capacity_)) {
+  if (!to_space_.Setup(start,
+                       initial_semispace_capacity,
+                       maximum_semispace_capacity)) {
     return false;
   }
-  if (!from_space_.Setup(start + maximum_capacity_,
-                         capacity_,
-                         maximum_capacity_)) {
+  if (!from_space_.Setup(start + maximum_semispace_capacity,
+                         initial_semispace_capacity,
+                         maximum_semispace_capacity)) {
     return false;
   }
 
@@ -938,7 +916,6 @@ void NewSpace::TearDown() {
 #endif
 
   start_ = NULL;
-  capacity_ = 0;
   allocation_info_.top = NULL;
   allocation_info_.limit = NULL;
   mc_forwarding_info_.top = NULL;
@@ -975,12 +952,11 @@ void NewSpace::Flip() {
 
 
 bool NewSpace::Grow() {
-  ASSERT(capacity_ < maximum_capacity_);
+  ASSERT(Capacity() < MaximumCapacity());
   // TODO(1240712): Failure to double the from space can result in
   // semispaces of different sizes.  In the event of that failure, the
   // to space doubling should be rolled back before returning false.
   if (!to_space_.Grow() || !from_space_.Grow()) return false;
-  capacity_ = to_space_.Capacity() + from_space_.Capacity();
   allocation_info_.limit = to_space_.high();
   ASSERT_SEMISPACE_ALLOCATION_INFO(allocation_info_, to_space_);
   return true;
@@ -1104,10 +1080,9 @@ void SemiSpace::TearDown() {
 
 bool SemiSpace::Grow() {
   // Commit 50% extra space but only up to maximum capacity.
-  int extra = RoundUp(capacity_ / 2, OS::AllocateAlignment());
-  if (capacity_ + extra > maximum_capacity_) {
-    extra = maximum_capacity_ - capacity_;
-  }
+  int maximum_extra = maximum_capacity_ - capacity_;
+  int extra = Min(RoundUp(capacity_ / 2, OS::AllocateAlignment()),
+                  maximum_extra);
   if (!MemoryAllocator::CommitBlock(high(), extra, executable())) {
     return false;
   }
diff --git a/deps/v8/src/spaces.h b/deps/v8/src/spaces.h
index 4760a42402..f12e0e4f47 100644
--- a/deps/v8/src/spaces.h
+++ b/deps/v8/src/spaces.h
@@ -1054,6 +1054,10 @@ class SemiSpace : public Space {
   // Returns the current capacity of the semi space.
   int Capacity() { return capacity_; }
 
+  // Returns the maximum capacity of the semi space.
+  int MaximumCapacity() { return maximum_capacity_; }
+
+
  private:
   // The current and maximum capacity of the space.
   int capacity_;
@@ -1164,12 +1168,18 @@ class NewSpace : public Space {
   // Return the allocated bytes in the active semispace.
   virtual int Size() { return top() - bottom(); }
   // Return the current capacity of a semispace.
-  int Capacity() { return capacity_; }
+  int Capacity() {
+    ASSERT(to_space_.Capacity() == from_space_.Capacity());
+    return to_space_.Capacity();
+  }
   // Return the available bytes without growing in the active semispace.
   int Available() { return Capacity() - Size(); }
 
   // Return the maximum capacity of a semispace.
-  int MaximumCapacity() { return maximum_capacity_; }
+  int MaximumCapacity() {
+    ASSERT(to_space_.MaximumCapacity() == from_space_.MaximumCapacity());
+    return to_space_.MaximumCapacity();
+  }
 
   // Return the address of the allocation pointer in the active semispace.
   Address top() { return allocation_info_.top; }
@@ -1275,10 +1285,6 @@ class NewSpace : public Space {
   }
 
  private:
-  // The current and maximum capacities of a semispace.
-  int capacity_;
-  int maximum_capacity_;
-
   // The semispaces.
   SemiSpace to_space_;
   SemiSpace from_space_;
@@ -1574,7 +1580,7 @@ class FixedSpace : public PagedSpace {
   // Give a fixed sized block of memory to the space's free list.
   void Free(Address start) {
     free_list_.Free(start);
-    accounting_stats_.DeallocateBytes(Map::kSize);
+    accounting_stats_.DeallocateBytes(object_size_in_bytes_);
   }
 
   // Prepares for a mark-compact GC.
diff --git a/deps/v8/src/v8-counters.h b/deps/v8/src/v8-counters.h
index a62cd74465..43cd5e3d60 100644
--- a/deps/v8/src/v8-counters.h
+++ b/deps/v8/src/v8-counters.h
@@ -139,6 +139,8 @@ namespace internal {
   SC(named_store_global_inline_miss, V8.NamedStoreGlobalInlineMiss) \
   SC(call_global_inline, V8.CallGlobalInline)                       \
   SC(call_global_inline_miss, V8.CallGlobalInlineMiss)              \
+  SC(constructed_objects, V8.ConstructedObjects)                    \
+  SC(constructed_objects_runtime, V8.ConstructedObjectsRuntime)     \
   SC(for_in, V8.ForIn)                                              \
   SC(enum_cache_hits, V8.EnumCacheHits)                             \
   SC(enum_cache_misses, V8.EnumCacheMisses)                         \
diff --git a/deps/v8/src/v8natives.js b/deps/v8/src/v8natives.js
index 841c920852..be92347768 100644
--- a/deps/v8/src/v8natives.js
+++ b/deps/v8/src/v8natives.js
@@ -46,12 +46,16 @@ const $isFinite = GlobalIsFinite;
 
 // Helper function used to install functions on objects.
 function InstallFunctions(object, attributes, functions) {
+  if (functions.length >= 8) {
+    %OptimizeObjectForAddingMultipleProperties(object, functions.length >> 1);
+  }
   for (var i = 0; i < functions.length; i += 2) {
     var key = functions[i];
     var f = functions[i + 1];
     %FunctionSetName(f, key);
     %SetProperty(object, key, f, attributes);
   }
+  %TransformToFastProperties(object);
 }
 
 // Emulates JSC by installing functions on a hidden prototype that
@@ -453,9 +457,11 @@ function NumberToJSON(key) {
 // ----------------------------------------------------------------------------
 
 function SetupNumber() {
+  %OptimizeObjectForAddingMultipleProperties($Number.prototype, 8);
   // Setup the constructor property on the Number prototype object.
   %SetProperty($Number.prototype, "constructor", $Number, DONT_ENUM);
 
+  %OptimizeObjectForAddingMultipleProperties($Number, 5);
   // ECMA-262 section 15.7.3.1.
   %SetProperty($Number,
                "MAX_VALUE",
@@ -479,6 +485,7 @@ function SetupNumber() {
                "POSITIVE_INFINITY",
                1/0,
                DONT_ENUM | DONT_DELETE | READ_ONLY);
+  %TransformToFastProperties($Number);
 
   // Setup non-enumerable functions on the Number prototype object.
   InstallFunctions($Number.prototype, DONT_ENUM, $Array(
diff --git a/deps/v8/src/version.cc b/deps/v8/src/version.cc
index 7bc52a8490..26b009c78d 100644
--- a/deps/v8/src/version.cc
+++ b/deps/v8/src/version.cc
@@ -34,7 +34,7 @@
 // cannot be changed without changing the SCons build script.
 #define MAJOR_VERSION     1
 #define MINOR_VERSION     3
-#define BUILD_NUMBER      4
+#define BUILD_NUMBER      5
 #define PATCH_LEVEL       0
 #define CANDIDATE_VERSION false
 
diff --git a/deps/v8/src/x64/assembler-x64-inl.h b/deps/v8/src/x64/assembler-x64-inl.h
index 196f2eedbd..f51a3ea887 100644
--- a/deps/v8/src/x64/assembler-x64-inl.h
+++ b/deps/v8/src/x64/assembler-x64-inl.h
@@ -228,43 +228,47 @@ void RelocInfo::set_target_object(Object* target) {
 
 
 bool RelocInfo::IsCallInstruction() {
-  UNIMPLEMENTED();  // IA32 code below.
-  return *pc_ == 0xE8;
+  // The recognized call sequence is:
+  //  movq(kScratchRegister, immediate64); call(kScratchRegister);
+  // It only needs to be distinguished from a return sequence
+  //  movq(rsp, rbp); pop(rbp); ret(n); int3 *6
+  // The 11th byte is int3 (0xCC) in the return sequence and
+  // REX.WB (0x48+register bit) for the call sequence.
+  return pc_[10] != 0xCC;
 }
 
 
 Address RelocInfo::call_address() {
-  UNIMPLEMENTED();  // IA32 code below.
   ASSERT(IsCallInstruction());
-  return Assembler::target_address_at(pc_ + 1);
+  return Assembler::target_address_at(
+      pc_ + Assembler::kPatchReturnSequenceAddressOffset);
 }
 
 
 void RelocInfo::set_call_address(Address target) {
-  UNIMPLEMENTED();  // IA32 code below.
   ASSERT(IsCallInstruction());
-  Assembler::set_target_address_at(pc_ + 1, target);
+  Assembler::set_target_address_at(
+      pc_ + Assembler::kPatchReturnSequenceAddressOffset,
+      target);
 }
 
 
 Object* RelocInfo::call_object() {
-  UNIMPLEMENTED();  // IA32 code below.
   ASSERT(IsCallInstruction());
   return *call_object_address();
 }
 
 
 void RelocInfo::set_call_object(Object* target) {
-  UNIMPLEMENTED();  // IA32 code below.
   ASSERT(IsCallInstruction());
   *call_object_address() = target;
 }
 
 
 Object** RelocInfo::call_object_address() {
-  UNIMPLEMENTED();  // IA32 code below.
   ASSERT(IsCallInstruction());
-  return reinterpret_cast<Object**>(pc_ + 1);
+  return reinterpret_cast<Object**>(
+      pc_ + Assembler::kPatchReturnSequenceAddressOffset);
 }
 
 // -----------------------------------------------------------------------------
diff --git a/deps/v8/src/x64/assembler-x64.cc b/deps/v8/src/x64/assembler-x64.cc
index b4fd678e17..a02557e96a 100644
--- a/deps/v8/src/x64/assembler-x64.cc
+++ b/deps/v8/src/x64/assembler-x64.cc
@@ -178,6 +178,13 @@ void RelocInfo::PatchCodeWithCall(Address target, int guard_bytes) {
 }
 
 
+void RelocInfo::PatchCode(byte* instructions, int instruction_count) {
+  // Patch the code at the current address with the supplied instructions.
+  for (int i = 0; i < instruction_count; i++) {
+    *(pc_ + i) = *(instructions + i);
+  }
+}
+
 // -----------------------------------------------------------------------------
 // Implementation of Operand
 
@@ -437,21 +444,43 @@ void Assembler::arithmetic_op(byte opcode, Register reg, const Operand& op) {
 }
 
 
-void Assembler::arithmetic_op(byte opcode, Register dst, Register src) {
+void Assembler::arithmetic_op(byte opcode, Register reg, Register rm_reg) {
   EnsureSpace ensure_space(this);
   last_pc_ = pc_;
-  emit_rex_64(dst, src);
+  emit_rex_64(reg, rm_reg);
   emit(opcode);
-  emit_modrm(dst, src);
+  emit_modrm(reg, rm_reg);
 }
 
 
-void Assembler::arithmetic_op_32(byte opcode, Register dst, Register src) {
+void Assembler::arithmetic_op_16(byte opcode, Register reg, Register rm_reg) {
   EnsureSpace ensure_space(this);
   last_pc_ = pc_;
-  emit_optional_rex_32(dst, src);
+  emit(0x66);
+  emit_optional_rex_32(reg, rm_reg);
   emit(opcode);
-  emit_modrm(dst, src);
+  emit_modrm(reg, rm_reg);
+}
+
+
+void Assembler::arithmetic_op_16(byte opcode,
+                                 Register reg,
+                                 const Operand& rm_reg) {
+  EnsureSpace ensure_space(this);
+  last_pc_ = pc_;
+  emit(0x66);
+  emit_optional_rex_32(reg, rm_reg);
+  emit(opcode);
+  emit_operand(reg, rm_reg);
+}
+
+
+void Assembler::arithmetic_op_32(byte opcode, Register reg, Register rm_reg) {
+  EnsureSpace ensure_space(this);
+  last_pc_ = pc_;
+  emit_optional_rex_32(reg, rm_reg);
+  emit(opcode);
+  emit_modrm(reg, rm_reg);
 }
 
 
@@ -504,6 +533,47 @@ void Assembler::immediate_arithmetic_op(byte subcode,
 }
 
 
+void Assembler::immediate_arithmetic_op_16(byte subcode,
+                                           Register dst,
+                                           Immediate src) {
+  EnsureSpace ensure_space(this);
+  last_pc_ = pc_;
+  emit(0x66);  // Operand size override prefix.
+  emit_optional_rex_32(dst);
+  if (is_int8(src.value_)) {
+    emit(0x83);
+    emit_modrm(subcode, dst);
+    emit(src.value_);
+  } else if (dst.is(rax)) {
+    emit(0x05 | (subcode << 3));
+    emitl(src.value_);
+  } else {
+    emit(0x81);
+    emit_modrm(subcode, dst);
+    emitl(src.value_);
+  }
+}
+
+
+void Assembler::immediate_arithmetic_op_16(byte subcode,
+                                           const Operand& dst,
+                                           Immediate src) {
+  EnsureSpace ensure_space(this);
+  last_pc_ = pc_;
+  emit(0x66);  // Operand size override prefix.
+  emit_optional_rex_32(dst);
+  if (is_int8(src.value_)) {
+    emit(0x83);
+    emit_operand(subcode, dst);
+    emit(src.value_);
+  } else {
+    emit(0x81);
+    emit_operand(subcode, dst);
+    emitl(src.value_);
+  }
+}
+
+
 void Assembler::immediate_arithmetic_op_32(byte subcode,
                                            Register dst,
                                            Immediate src) {
@@ -744,6 +814,14 @@ void Assembler::cmovl(Condition cc, Register dst, const Operand& src) {
 }
 
 
+void Assembler::cmpb_al(Immediate imm8) {
+  ASSERT(is_int8(imm8.value_) || is_uint8(imm8.value_));
+  EnsureSpace ensure_space(this);
+  last_pc_ = pc_;
+  emit(0x3c);
+  emit(imm8.value_);
+}
+
 
 void Assembler::cpuid() {
   ASSERT(CpuFeatures::IsEnabled(CpuFeatures::CPUID));
@@ -1000,6 +1078,16 @@ void Assembler::jmp(Register target) {
 }
 
 
+void Assembler::jmp(const Operand& src) {
+  EnsureSpace ensure_space(this);
+  last_pc_ = pc_;
+  // Opcode FF/4 m64
+  emit_optional_rex_32(src);
+  emit(0xFF);
+  emit_operand(0x4, src);
+}
+
+
 void Assembler::lea(Register dst, const Operand& src) {
   EnsureSpace ensure_space(this);
   last_pc_ = pc_;
@@ -1193,6 +1281,32 @@ void Assembler::movq(const Operand& dst, Immediate value) {
 }
 
 
+/*
+ * Loads the ip-relative location of the src label into the target
+ * location (as a 32-bit offset sign extended to 64-bit).
+ */
+void Assembler::movl(const Operand& dst, Label* src) {
+  EnsureSpace ensure_space(this);
+  last_pc_ = pc_;
+  emit_optional_rex_32(dst);
+  emit(0xC7);
+  emit_operand(0, dst);
+  if (src->is_bound()) {
+    int offset = src->pos() - pc_offset() - sizeof(int32_t);
+    ASSERT(offset <= 0);
+    emitl(offset);
+  } else if (src->is_linked()) {
+    emitl(src->pos());
+    src->link_to(pc_offset() - sizeof(int32_t));
+  } else {
+    ASSERT(src->is_unused());
+    int32_t current = pc_offset();
+    emitl(current);
+    src->link_to(current);
+  }
+}
+
+
 void Assembler::movq(Register dst, Handle<Object> value, RelocInfo::Mode mode) {
   // If there is no relocation info, emit the value of the handle efficiently
   // (possibly using less that 8 bytes for the value).
@@ -1608,6 +1722,11 @@ void Assembler::testl(Register dst, Register src) {
 
 
 void Assembler::testl(Register reg, Immediate mask) {
+  // testl with a mask that fits in the low byte is exactly testb.
+  if (is_uint8(mask.value_)) {
+    testb(reg, mask);
+    return;
+  }
   EnsureSpace ensure_space(this);
   last_pc_ = pc_;
   if (reg.is(rax)) {
@@ -1623,6 +1742,11 @@ void Assembler::testl(Register reg, Immediate mask) {
 
 
 void Assembler::testl(const Operand& op, Immediate mask) {
+  // testl with a mask that fits in the low byte is exactly testb.
+  if (is_uint8(mask.value_)) {
+    testb(op, mask);
+    return;
+  }
   EnsureSpace ensure_space(this);
   last_pc_ = pc_;
   emit_optional_rex_32(rax, op);
diff --git a/deps/v8/src/x64/assembler-x64.h b/deps/v8/src/x64/assembler-x64.h
index 015fa68237..9d602b9ef1 100644
--- a/deps/v8/src/x64/assembler-x64.h
+++ b/deps/v8/src/x64/assembler-x64.h
@@ -442,8 +442,10 @@ class Assembler : public Malloced {
 
   // Distance between the address of the code target in the call instruction
   // and the return address.  Checked in the debug build.
-  static const int kTargetAddrToReturnAddrDist = 3 + kPointerSize;
-
+  static const int kPatchReturnSequenceLength = 3 + kPointerSize;
+  // Distance between start of patched return sequence and the emitted address
+  // to jump to (movq = REX.W 0xB8+r.).
+  static const int kPatchReturnSequenceAddressOffset = 2;
 
   // ---------------------------------------------------------------------------
   // Code generation
@@ -496,13 +498,17 @@ class Assembler : public Malloced {
   // Load a 32-bit immediate value, zero-extended to 64 bits.
   void movl(Register dst, Immediate imm32);
 
+  // Move 64 bit register value to 64-bit memory location.
+  void movq(const Operand& dst, Register src);
+  // Move 64 bit memory location to 64-bit register value.
   void movq(Register dst, const Operand& src);
+  void movq(Register dst, Register src);
   // Sign extends immediate 32-bit value to 64 bits.
   void movq(Register dst, Immediate x);
-  void movq(Register dst, Register src);
+  // Move the offset of the label location relative to the current
+  // position (after the move) to the destination.
+  void movl(const Operand& dst, Label* src);
 
-  // Move 64 bit register value to 64-bit memory location.
-  void movq(const Operand& dst, Register src);
   // Move sign extended immediate to memory location.
   void movq(const Operand& dst, Immediate value);
   // New x64 instructions to load a 64-bit immediate into a register.
@@ -535,7 +541,11 @@ class Assembler : public Malloced {
 
   // Arithmetics
   void addl(Register dst, Register src) {
-    arithmetic_op_32(0x03, dst, src);
+    if (dst.low_bits() == 4) {  // Forces SIB byte.
+      arithmetic_op_32(0x01, src, dst);
+    } else {
+      arithmetic_op_32(0x03, dst, src);
+    }
   }
 
   void addl(Register dst, Immediate src) {
@@ -574,10 +584,44 @@ class Assembler : public Malloced {
     immediate_arithmetic_op_8(0x7, dst, src);
   }
 
+  void cmpb_al(Immediate src);
+
+  void cmpb(Register dst, Register src) {
+    arithmetic_op(0x3A, dst, src);
+  }
+
+  void cmpb(Register dst, const Operand& src) {
+    arithmetic_op(0x3A, dst, src);
+  }
+
+  void cmpb(const Operand& dst, Register src) {
+    arithmetic_op(0x38, src, dst);
+  }
+
   void cmpb(const Operand& dst, Immediate src) {
     immediate_arithmetic_op_8(0x7, dst, src);
   }
 
+  void cmpw(const Operand& dst, Immediate src) {
+    immediate_arithmetic_op_16(0x7, dst, src);
+  }
+
+  void cmpw(Register dst, Immediate src) {
+    immediate_arithmetic_op_16(0x7, dst, src);
+  }
+
+  void cmpw(Register dst, const Operand& src) {
+    arithmetic_op_16(0x3B, dst, src);
+  }
+
+  void cmpw(Register dst, Register src) {
+    arithmetic_op_16(0x3B, dst, src);
+  }
+
+  void cmpw(const Operand& dst, Register src) {
+    arithmetic_op_16(0x39, src, dst);
+  }
+
   void cmpl(Register dst, Register src) {
     arithmetic_op_32(0x3B, dst, src);
   }
@@ -794,6 +838,10 @@ class Assembler : public Malloced {
     immediate_arithmetic_op_32(0x5, dst, src);
   }
 
+  void subb(Register dst, Immediate src) {
+    immediate_arithmetic_op_8(0x5, dst, src);
+  }
+
   void testb(Register reg, Immediate mask);
   void testb(const Operand& op, Immediate mask);
   void testl(Register dst, Register src);
@@ -871,6 +919,9 @@ class Assembler : public Malloced {
   // Jump near absolute indirect (r64)
   void jmp(Register adr);
 
+  // Jump near absolute indirect (m64)
+  void jmp(const Operand& src);
+
   // Conditional jumps
   void j(Condition cc, Label* L);
 
@@ -1141,26 +1192,36 @@ class Assembler : public Malloced {
   // AND, OR, XOR, or CMP.  The encodings of these operations are all
   // similar, differing just in the opcode or in the reg field of the
   // ModR/M byte.
-  void arithmetic_op(byte opcode, Register dst, Register src);
-  void arithmetic_op_32(byte opcode, Register dst, Register src);
+  void arithmetic_op_16(byte opcode, Register reg, Register rm_reg);
+  void arithmetic_op_16(byte opcode, Register reg, const Operand& rm_reg);
+  void arithmetic_op_32(byte opcode, Register reg, Register rm_reg);
   void arithmetic_op_32(byte opcode, Register reg, const Operand& rm_reg);
+  void arithmetic_op(byte opcode, Register reg, Register rm_reg);
   void arithmetic_op(byte opcode, Register reg, const Operand& rm_reg);
   void immediate_arithmetic_op(byte subcode, Register dst, Immediate src);
   void immediate_arithmetic_op(byte subcode, const Operand& dst, Immediate src);
-  // Operate on a 32-bit word in memory or register.
-  void immediate_arithmetic_op_32(byte subcode,
-                                  const Operand& dst,
-                                  Immediate src);
-  void immediate_arithmetic_op_32(byte subcode,
-                                  Register dst,
-                                  Immediate src);
   // Operate on a byte in memory or register.
   void immediate_arithmetic_op_8(byte subcode,
-                                 const Operand& dst,
+                                 Register dst,
                                  Immediate src);
   void immediate_arithmetic_op_8(byte subcode,
-                                 Register dst,
+                                 const Operand& dst,
                                  Immediate src);
+  // Operate on a word in memory or register.
+  void immediate_arithmetic_op_16(byte subcode,
+                                  Register dst,
+                                  Immediate src);
+  void immediate_arithmetic_op_16(byte subcode,
+                                  const Operand& dst,
+                                  Immediate src);
+  // Operate on a 32-bit word in memory or register.
+  void immediate_arithmetic_op_32(byte subcode,
+                                  Register dst,
+                                  Immediate src);
+  void immediate_arithmetic_op_32(byte subcode,
+                                  const Operand& dst,
+                                  Immediate src);
+
   // Emit machine code for a shift operation.
   void shift(Register dst, Immediate shift_amount, int subcode);
   void shift_32(Register dst, Immediate shift_amount, int subcode);
@@ -1180,6 +1241,7 @@ class Assembler : public Malloced {
 
   friend class CodePatcher;
   friend class EnsureSpace;
+  friend class RegExpMacroAssemblerX64;
 
   // Code buffer:
   // The buffer into which code and relocation info are generated.
diff --git a/deps/v8/src/x64/builtins-x64.cc b/deps/v8/src/x64/builtins-x64.cc
index 087aaff2cb..6988d72082 100644
--- a/deps/v8/src/x64/builtins-x64.cc
+++ b/deps/v8/src/x64/builtins-x64.cc
@@ -35,7 +35,7 @@ namespace internal {
 #define __ ACCESS_MASM(masm)
 
 void Builtins::Generate_Adaptor(MacroAssembler* masm, CFunctionId id) {
-  // TODO(1238487): Don't pass the function in a static variable.
+  // TODO(428): Don't pass the function in a static variable.
   ExternalReference passed = ExternalReference::builtin_passed_function();
   __ movq(kScratchRegister, passed.address(), RelocInfo::EXTERNAL_REFERENCE);
   __ movq(Operand(kScratchRegister, 0), rdi);
@@ -505,7 +505,14 @@ void Builtins::Generate_JSConstructStubGeneric(MacroAssembler* masm) {
   Label rt_call, allocated;
   if (FLAG_inline_new) {
     Label undo_allocation;
-    // TODO(X64): Enable debugger support, using debug_step_in_fp.
+
+#ifdef ENABLE_DEBUGGER_SUPPORT
+    ExternalReference debug_step_in_fp =
+        ExternalReference::debug_step_in_fp_address();
+    __ movq(kScratchRegister, debug_step_in_fp);
+    __ cmpq(Operand(kScratchRegister, 0), Immediate(0));
+    __ j(not_equal, &rt_call);
+#endif
 
     // Verified that the constructor is a JSFunction.
     // Load the initial map and verify that it is in fact a map.
@@ -585,12 +592,16 @@ void Builtins::Generate_JSConstructStubGeneric(MacroAssembler* masm) {
     // rax: initial map
     // rbx: JSObject
     // rdi: start of next object
+    // Calculate total properties described map.
     __ movzxbq(rdx, FieldOperand(rax, Map::kUnusedPropertyFieldsOffset));
-    __ movzxbq(rcx, FieldOperand(rax, Map::kInObjectPropertiesOffset));
+    __ movzxbq(rcx, FieldOperand(rax, Map::kPreAllocatedPropertyFieldsOffset));
+    __ addq(rdx, rcx);
     // Calculate unused properties past the end of the in-object properties.
+    __ movzxbq(rcx, FieldOperand(rax, Map::kInObjectPropertiesOffset));
     __ subq(rdx, rcx);
     // Done if no extra properties are to be allocated.
     __ j(zero, &allocated);
+    __ Assert(positive, "Property allocation count failed.");
 
     // Scale the number of elements by pointer size and add the header for
     // FixedArrays to the start of the next object calculation from above.
@@ -726,6 +737,7 @@ void Builtins::Generate_JSConstructStubGeneric(MacroAssembler* masm) {
   __ pop(rcx);
   __ lea(rsp, Operand(rsp, rbx, times_4, 1 * kPointerSize));  // 1 ~ receiver
   __ push(rcx);
+  __ IncrementCounter(&Counters::constructed_objects, 1);
   __ ret(0);
 }
 
@@ -823,10 +835,8 @@ static void Generate_JSEntryTrampolineHelper(MacroAssembler* masm,
   // Invoke the code.
   if (is_construct) {
     // Expects rdi to hold function pointer.
-    __ movq(kScratchRegister,
-            Handle<Code>(Builtins::builtin(Builtins::JSConstructCall)),
+    __ Call(Handle<Code>(Builtins::builtin(Builtins::JSConstructCall)),
             RelocInfo::CODE_TARGET);
-    __ call(kScratchRegister);
   } else {
     ParameterCount actual(rax);
     // Function must be in rdi.
diff --git a/deps/v8/src/x64/cfg-x64.cc b/deps/v8/src/x64/cfg-x64.cc
index 8d01ed28e1..34ddbbf025 100644
--- a/deps/v8/src/x64/cfg-x64.cc
+++ b/deps/v8/src/x64/cfg-x64.cc
@@ -114,8 +114,8 @@ void ExitNode::Compile(MacroAssembler* masm) {
   int count = CfgGlobals::current()->fun()->scope()->num_parameters();
   __ ret((count + 1) * kPointerSize);
   // Add padding that will be overwritten by a debugger breakpoint.
-  // "movq rsp, rbp; pop rbp" has length 5.  "ret k" has length 2.
-  const int kPadding = Debug::kX64JSReturnSequenceLength - 5 - 2;
+  // "movq rsp, rbp; pop rbp" has length 4.  "ret k" has length 3.
+  const int kPadding = Debug::kX64JSReturnSequenceLength - 4 - 3;
   for (int i = 0; i < kPadding; ++i) {
     __ int3();
   }
diff --git a/deps/v8/src/x64/codegen-x64.cc b/deps/v8/src/x64/codegen-x64.cc
index b3df929d78..7fe6ebdb8b 100644
--- a/deps/v8/src/x64/codegen-x64.cc
+++ b/deps/v8/src/x64/codegen-x64.cc
@@ -500,17 +500,19 @@ void CodeGenerator::GenerateReturnSequence(Result* return_value) {
   return_value->ToRegister(rax);
 
   // Add a label for checking the size of the code used for returning.
+#ifdef DEBUG
   Label check_exit_codesize;
   masm_->bind(&check_exit_codesize);
+#endif
 
   // Leave the frame and return popping the arguments and the
   // receiver.
   frame_->Exit();
   masm_->ret((scope_->num_parameters() + 1) * kPointerSize);
   // Add padding that will be overwritten by a debugger breakpoint.
-  // frame_->Exit() generates "movq rsp, rbp; pop rbp" length 5.
-  // "ret k" has length 2.
-  const int kPadding = Debug::kX64JSReturnSequenceLength - 5 - 2;
+  // frame_->Exit() generates "movq rsp, rbp; pop rbp; ret k"
+  // with length 7 (3 + 1 + 3).
+  const int kPadding = Debug::kX64JSReturnSequenceLength - 7;
   for (int i = 0; i < kPadding; ++i) {
     masm_->int3();
   }
@@ -3084,26 +3086,19 @@ void CodeGenerator::VisitCountOperation(CountOperation* node) {
                                                   is_increment);
     }
 
-    Result tmp = allocator_->AllocateWithoutSpilling();
-    ASSERT(kSmiTagMask == 1 && kSmiTag == 0);
-    __ movl(tmp.reg(), Immediate(kSmiTagMask));
-    // Smi test.
     __ movq(kScratchRegister, new_value.reg());
     if (is_increment) {
       __ addl(kScratchRegister, Immediate(Smi::FromInt(1)));
     } else {
       __ subl(kScratchRegister, Immediate(Smi::FromInt(1)));
     }
-    // deferred->Branch(overflow);
-    __ cmovl(overflow, kScratchRegister, tmp.reg());
-    __ testl(kScratchRegister, tmp.reg());
-    tmp.Unuse();
+    // Smi test.
+    deferred->Branch(overflow);
+    __ testl(kScratchRegister, Immediate(kSmiTagMask));
     deferred->Branch(not_zero);
     __ movq(new_value.reg(), kScratchRegister);
-
     deferred->BindExit();
 
-
     // Postfix: store the old value in the allocated slot under the
     // reference.
     if (is_postfix) frame_->SetElementAt(target.size(), &old_value);
@@ -5738,6 +5733,13 @@ void Reference::GetValue(TypeofState typeof_state) {
   ASSERT(cgen_->HasValidEntryRegisters());
   ASSERT(!is_illegal());
   MacroAssembler* masm = cgen_->masm();
+
+  // Record the source position for the property load.
+  Property* property = expression_->AsProperty();
+  if (property != NULL) {
+    cgen_->CodeForSourcePosition(property->position());
+  }
+
   switch (type_) {
     case SLOT: {
       Comment cmnt(masm, "[ Load from Slot");
@@ -6957,17 +6959,12 @@ void CEntryStub::GenerateBody(MacroAssembler* masm, bool is_debug_break) {
   Label throw_out_of_memory_exception;
   Label throw_normal_exception;
 
-  // Call into the runtime system. Collect garbage before the call if
-  // running with --gc-greedy set.
-  if (FLAG_gc_greedy) {
-    Failure* failure = Failure::RetryAfterGC(0);
-    __ movq(rax, failure, RelocInfo::NONE);
-  }
+  // Call into the runtime system.
   GenerateCore(masm,
                &throw_normal_exception,
                &throw_out_of_memory_exception,
                frame_type,
-               FLAG_gc_greedy,
+               false,
                false);
 
   // Do space-specific GC and retry runtime call.
@@ -7536,11 +7533,10 @@ void GenericBinaryOpStub::Generate(MacroAssembler* masm) {
       // Reserve space for converted numbers.
       __ subq(rsp, Immediate(2 * kPointerSize));
 
-      bool use_sse3 = CpuFeatures::IsSupported(CpuFeatures::SSE3);
-      if (use_sse3) {
+      if (use_sse3_) {
         // Truncate the operands to 32-bit integers and check for
         // exceptions in doing so.
-         CpuFeatures::Scope scope(CpuFeatures::SSE3);
+        CpuFeatures::Scope scope(CpuFeatures::SSE3);
         __ fisttp_s(Operand(rsp, 0 * kPointerSize));
         __ fisttp_s(Operand(rsp, 1 * kPointerSize));
         __ fnstsw_ax();
@@ -7625,7 +7621,7 @@ void GenericBinaryOpStub::Generate(MacroAssembler* masm) {
       // the runtime system.
       __ bind(&operand_conversion_failure);
       __ addq(rsp, Immediate(2 * kPointerSize));
-      if (use_sse3) {
+      if (use_sse3_) {
         // If we've used the SSE3 instructions for truncating the
         // floating point values to integers and it failed, we have a
         // pending #IA exception. Clear it.
diff --git a/deps/v8/src/x64/codegen-x64.h b/deps/v8/src/x64/codegen-x64.h
index b1c61d8688..bfdff56744 100644
--- a/deps/v8/src/x64/codegen-x64.h
+++ b/deps/v8/src/x64/codegen-x64.h
@@ -299,14 +299,9 @@ class CodeGenerator: public AstVisitor {
 #endif
 
   static void SetFunctionInfo(Handle<JSFunction> fun,
-                              int length,
-                              int function_token_position,
-                              int start_position,
-                              int end_position,
-                              bool is_expression,
+                              FunctionLiteral* lit,
                               bool is_toplevel,
-                              Handle<Script> script,
-                              Handle<String> inferred_name);
+                              Handle<Script> script);
 
   // Accessors
   MacroAssembler* masm() { return masm_; }
@@ -624,6 +619,7 @@ class GenericBinaryOpStub: public CodeStub {
                       OverwriteMode mode,
                       GenericBinaryFlags flags)
       : op_(op), mode_(mode), flags_(flags) {
+    use_sse3_ = CpuFeatures::IsSupported(CpuFeatures::SSE3);
     ASSERT(OpBits::is_valid(Token::NUM_TOKENS));
   }
 
@@ -633,6 +629,7 @@ class GenericBinaryOpStub: public CodeStub {
   Token::Value op_;
   OverwriteMode mode_;
   GenericBinaryFlags flags_;
+  bool use_sse3_;
 
   const char* GetName();
 
@@ -645,17 +642,19 @@ class GenericBinaryOpStub: public CodeStub {
   }
 #endif
 
-  // Minor key encoding in 16 bits FOOOOOOOOOOOOOMM.
+  // Minor key encoding in 16 bits FSOOOOOOOOOOOOMM.
   class ModeBits: public BitField<OverwriteMode, 0, 2> {};
-  class OpBits: public BitField<Token::Value, 2, 13> {};
+  class OpBits: public BitField<Token::Value, 2, 12> {};
+  class SSE3Bits: public BitField<bool, 14, 1> {};
   class FlagBits: public BitField<GenericBinaryFlags, 15, 1> {};
 
   Major MajorKey() { return GenericBinaryOp; }
   int MinorKey() {
     // Encode the parameters in a unique 16 bit value.
     return OpBits::encode(op_)
-           | ModeBits::encode(mode_)
-           | FlagBits::encode(flags_);
+        | ModeBits::encode(mode_)
+        | FlagBits::encode(flags_)
+        | SSE3Bits::encode(use_sse3_);
   }
   void Generate(MacroAssembler* masm);
 };
diff --git a/deps/v8/src/x64/debug-x64.cc b/deps/v8/src/x64/debug-x64.cc
index 177eb90a49..f2bb62bc69 100644
--- a/deps/v8/src/x64/debug-x64.cc
+++ b/deps/v8/src/x64/debug-x64.cc
@@ -39,60 +39,176 @@ namespace internal {
 
 bool Debug::IsDebugBreakAtReturn(v8::internal::RelocInfo* rinfo) {
   ASSERT(RelocInfo::IsJSReturn(rinfo->rmode()));
-  // 11th byte of patch is 0x49, 11th byte of JS return is 0xCC (int3).
+  // 11th byte of patch is 0x49 (REX.WB byte of computed jump/call to r10),
+  // 11th byte of JS return is 0xCC (int3).
   ASSERT(*(rinfo->pc() + 10) == 0x49 || *(rinfo->pc() + 10) == 0xCC);
-  return (*(rinfo->pc() + 10) == 0x49);
+  return (*(rinfo->pc() + 10) != 0xCC);
 }
 
+#define __ ACCESS_MASM(masm)
+
+static void Generate_DebugBreakCallHelper(MacroAssembler* masm,
+                                          RegList pointer_regs,
+                                          bool convert_call_to_jmp) {
+  // Save the content of all general purpose registers in memory. This copy in
+  // memory is later pushed onto the JS expression stack for the fake JS frame
+  // generated and also to the C frame generated on top of that. In the JS
+  // frame ONLY the registers containing pointers will be pushed on the
+  // expression stack. This causes the GC to update these pointers so that
+  // they will have the correct value when returning from the debugger.
+  __ SaveRegistersToMemory(kJSCallerSaved);
+
+  // Enter an internal frame.
+  __ EnterInternalFrame();
+
+  // Store the registers containing object pointers on the expression stack to
+  // make sure that these are correctly updated during GC.
+  __ PushRegistersFromMemory(pointer_regs);
+
+#ifdef DEBUG
+  __ RecordComment("// Calling from debug break to runtime - come in - over");
+#endif
+  __ xor_(rax, rax);  // No arguments (argc == 0).
+  __ movq(rbx, ExternalReference::debug_break());
+
+  CEntryDebugBreakStub ceb;
+  __ CallStub(&ceb);
+
+  // Restore the register values containing object pointers from the expression
+  // stack in the reverse order as they where pushed.
+  __ PopRegistersToMemory(pointer_regs);
+
+  // Get rid of the internal frame.
+  __ LeaveInternalFrame();
+
+  // If this call did not replace a call but patched other code then there will
+  // be an unwanted return address left on the stack. Here we get rid of that.
+  if (convert_call_to_jmp) {
+    __ pop(rax);
+  }
+
+  // Finally restore all registers.
+  __ RestoreRegistersFromMemory(kJSCallerSaved);
+
+  // Now that the break point has been handled, resume normal execution by
+  // jumping to the target address intended by the caller and that was
+  // overwritten by the address of DebugBreakXXX.
+  ExternalReference after_break_target =
+      ExternalReference(Debug_Address::AfterBreakTarget());
+  __ movq(kScratchRegister, after_break_target);
+  __ jmp(Operand(kScratchRegister, 0));
+}
+
+
 void Debug::GenerateCallICDebugBreak(MacroAssembler* masm) {
-  masm->int3();  // UNIMPLEMENTED
+  // Register state for keyed IC call call (from ic-x64.cc)
+  // ----------- S t a t e -------------
+  //  -- rax: number of arguments
+  // -----------------------------------
+  // The number of arguments in rax is not smi encoded.
+  Generate_DebugBreakCallHelper(masm, 0, false);
 }
 
+
 void Debug::GenerateConstructCallDebugBreak(MacroAssembler* masm) {
-  masm->int3();  // UNIMPLEMENTED
+  // Register state just before return from JS function (from codegen-x64.cc).
+  // rax is the actual number of arguments not encoded as a smi, see comment
+  // above IC call.
+  // ----------- S t a t e -------------
+  //  -- rax: number of arguments
+  // -----------------------------------
+  // The number of arguments in rax is not smi encoded.
+  Generate_DebugBreakCallHelper(masm, 0, false);
 }
 
+
 void Debug::GenerateKeyedLoadICDebugBreak(MacroAssembler* masm) {
-  masm->int3();  // UNIMPLEMENTED
+  // Register state for keyed IC load call (from ic-x64.cc).
+  // ----------- S t a t e -------------
+  //  No registers used on entry.
+  // -----------------------------------
+  Generate_DebugBreakCallHelper(masm, 0, false);
 }
 
+
 void Debug::GenerateKeyedStoreICDebugBreak(MacroAssembler* masm) {
-  masm->int3();  // UNIMPLEMENTED
+  // Register state for keyed IC load call (from ic-x64.cc).
+  // ----------- S t a t e -------------
+  //  -- rax    : value
+  // -----------------------------------
+  // Register rax contains an object that needs to be pushed on the
+  // expression stack of the fake JS frame.
+  Generate_DebugBreakCallHelper(masm, rax.bit(), false);
 }
 
+
 void Debug::GenerateLoadICDebugBreak(MacroAssembler* masm) {
-  masm->int3();  // UNIMPLEMENTED
+  // Register state for IC load call (from ic-x64.cc).
+  // ----------- S t a t e -------------
+  //  -- rcx    : name
+  // -----------------------------------
+  Generate_DebugBreakCallHelper(masm, rcx.bit(), false);
 }
 
+
 void Debug::GenerateReturnDebugBreak(MacroAssembler* masm) {
-  masm->int3();  // UNIMPLEMENTED
+  // Register state just before return from JS function (from codegen-x64.cc).
+  // ----------- S t a t e -------------
+  //  -- rax: return value
+  // -----------------------------------
+  Generate_DebugBreakCallHelper(masm, rax.bit(), true);
 }
 
+
 void Debug::GenerateReturnDebugBreakEntry(MacroAssembler* masm) {
-  masm->int3();  // UNIMPLEMENTED
+  // OK to clobber rbx as we are returning from a JS function through the code
+  // generated by CodeGenerator::GenerateReturnSequence()
+  ExternalReference debug_break_return =
+      ExternalReference(Debug_Address::DebugBreakReturn());
+  __ movq(rbx, debug_break_return);
+  __ movq(rbx, Operand(rbx, 0));
+  __ addq(rbx, Immediate(Code::kHeaderSize - kHeapObjectTag));
+  __ jmp(rbx);
 }
 
+
 void Debug::GenerateStoreICDebugBreak(MacroAssembler* masm) {
-  masm->int3();  // UNIMPLEMENTED
+  // REgister state for IC store call (from ic-x64.cc).
+  // ----------- S t a t e -------------
+  //  -- rax    : value
+  //  -- rcx    : name
+  // -----------------------------------
+  Generate_DebugBreakCallHelper(masm, rax.bit() | rcx.bit(), false);
 }
 
+
 void Debug::GenerateStubNoRegistersDebugBreak(MacroAssembler* masm) {
-  masm->int3();  // UNIMPLEMENTED
+  // Register state for stub CallFunction (from CallFunctionStub in ic-x64.cc).
+  // ----------- S t a t e -------------
+  //  No registers used on entry.
+  // -----------------------------------
+  Generate_DebugBreakCallHelper(masm, 0, false);
 }
 
+
+#undef __
+
+
 void BreakLocationIterator::ClearDebugBreakAtReturn() {
-  // TODO(X64): Implement this when we start setting Debug breaks.
-  UNIMPLEMENTED();
+  rinfo()->PatchCode(original_rinfo()->pc(),
+                     Debug::kX64JSReturnSequenceLength);
 }
 
+
 bool BreakLocationIterator::IsDebugBreakAtReturn()  {
-  // TODO(X64): Implement this when we start setting Debug breaks.
-  UNIMPLEMENTED();
-  return false;
+  return Debug::IsDebugBreakAtReturn(rinfo());
 }
 
+
 void BreakLocationIterator::SetDebugBreakAtReturn()  {
-  UNIMPLEMENTED();
+  ASSERT(Debug::kX64JSReturnSequenceLength >= Debug::kX64CallInstructionLength);
+  rinfo()->PatchCodeWithCall(Debug::debug_break_return_entry()->entry(),
+      Debug::kX64JSReturnSequenceLength - Debug::kX64CallInstructionLength);
 }
 
 #endif  // ENABLE_DEBUGGER_SUPPORT
diff --git a/deps/v8/src/x64/ic-x64.cc b/deps/v8/src/x64/ic-x64.cc
index 86008eb325..1c74a44d02 100644
--- a/deps/v8/src/x64/ic-x64.cc
+++ b/deps/v8/src/x64/ic-x64.cc
@@ -167,7 +167,7 @@ static bool PatchInlinedMapCheck(Address address, Object* map) {
   // Arguments are address of start of call sequence that called
   // the IC,
   Address test_instruction_address =
-      address + Assembler::kTargetAddrToReturnAddrDist;
+      address + Assembler::kPatchReturnSequenceLength;
   // The keyed load has a fast inlined case if the IC call instruction
   // is immediately followed by a test instruction.
   if (*test_instruction_address != kTestEaxByte) return false;
@@ -845,7 +845,7 @@ void LoadIC::GenerateStringLength(MacroAssembler* masm) {
 bool LoadIC::PatchInlinedLoad(Address address, Object* map, int offset) {
   // The address of the instruction following the call.
   Address test_instruction_address =
-      address + Assembler::kTargetAddrToReturnAddrDist;
+      address + Assembler::kPatchReturnSequenceLength;
   // If the instruction following the call is not a test eax, nothing
   // was inlined.
   if (*test_instruction_address != kTestEaxByte) return false;
diff --git a/deps/v8/src/x64/macro-assembler-x64.cc b/deps/v8/src/x64/macro-assembler-x64.cc
index 2219a5a0ee..8f8398dc9d 100644
--- a/deps/v8/src/x64/macro-assembler-x64.cc
+++ b/deps/v8/src/x64/macro-assembler-x64.cc
@@ -262,8 +262,7 @@ void MacroAssembler::Abort(const char* msg) {
 
 void MacroAssembler::CallStub(CodeStub* stub) {
   ASSERT(allow_stub_calls());  // calls are not allowed in some stubs
-  movq(kScratchRegister, stub->GetCode(), RelocInfo::CODE_TARGET);
-  call(kScratchRegister);
+  Call(stub->GetCode(), RelocInfo::CODE_TARGET);
 }
 
 
@@ -495,7 +494,6 @@ void MacroAssembler::Jump(Address destination, RelocInfo::Mode rmode) {
 
 
 void MacroAssembler::Jump(Handle<Code> code_object, RelocInfo::Mode rmode) {
-  WriteRecordedPositions();
   ASSERT(RelocInfo::IsCodeTarget(rmode));
   movq(kScratchRegister, code_object, rmode);
 #ifdef DEBUG
@@ -504,7 +502,7 @@ void MacroAssembler::Jump(Handle<Code> code_object, RelocInfo::Mode rmode) {
 #endif
   jmp(kScratchRegister);
 #ifdef DEBUG
-  ASSERT_EQ(kTargetAddrToReturnAddrDist,
+  ASSERT_EQ(kPatchReturnSequenceLength,
             SizeOfCodeGeneratedSince(&target) + kPointerSize);
 #endif
 }
@@ -523,8 +521,8 @@ void MacroAssembler::Call(Address destination, RelocInfo::Mode rmode) {
 
 
 void MacroAssembler::Call(Handle<Code> code_object, RelocInfo::Mode rmode) {
-  WriteRecordedPositions();
   ASSERT(RelocInfo::IsCodeTarget(rmode));
+  WriteRecordedPositions();
   movq(kScratchRegister, code_object, rmode);
 #ifdef DEBUG
   // Patch target is kPointer size bytes *before* target label.
@@ -533,7 +531,7 @@ void MacroAssembler::Call(Handle<Code> code_object, RelocInfo::Mode rmode) {
 #endif
   call(kScratchRegister);
 #ifdef DEBUG
-  ASSERT_EQ(kTargetAddrToReturnAddrDist,
+  ASSERT_EQ(kPatchReturnSequenceLength,
             SizeOfCodeGeneratedSince(&target) + kPointerSize);
 #endif
 }
@@ -799,7 +797,7 @@ void MacroAssembler::InvokeBuiltin(Builtins::JavaScript id, InvokeFlag flag) {
         Bootstrapper::FixupFlagsIsPCRelative::encode(false) |
         Bootstrapper::FixupFlagsUseCodeObject::encode(false);
     Unresolved entry =
-        { pc_offset() - kTargetAddrToReturnAddrDist, flags, name };
+        { pc_offset() - kPatchReturnSequenceLength, flags, name };
     unresolved_.Add(entry);
   }
 }
@@ -859,12 +857,11 @@ void MacroAssembler::InvokePrologue(const ParameterCount& expected,
       movq(rdx, code_register);
     }
 
-    movq(kScratchRegister, adaptor, RelocInfo::CODE_TARGET);
     if (flag == CALL_FUNCTION) {
-      call(kScratchRegister);
+      Call(adaptor, RelocInfo::CODE_TARGET);
       jmp(done);
     } else {
-      jmp(kScratchRegister);
+      Jump(adaptor, RelocInfo::CODE_TARGET);
     }
     bind(&invoke);
   }
diff --git a/deps/v8/src/x64/regexp-macro-assembler-x64.cc b/deps/v8/src/x64/regexp-macro-assembler-x64.cc
index 209aa2d307..1e38d6da97 100644
--- a/deps/v8/src/x64/regexp-macro-assembler-x64.cc
+++ b/deps/v8/src/x64/regexp-macro-assembler-x64.cc
@@ -25,3 +25,1277 @@
 // (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 "serialize.h"
+#include "unicode.h"
+#include "log.h"
+#include "ast.h"
+#include "regexp-stack.h"
+#include "macro-assembler.h"
+#include "regexp-macro-assembler.h"
+#include "x64/macro-assembler-x64.h"
+#include "x64/regexp-macro-assembler-x64.h"
+
+namespace v8 {
+namespace internal {
+
+/*
+ * This assembler uses the following register assignment convention
+ * - rdx : currently loaded character(s) as ASCII or UC16. Must be loaded using
+ *         LoadCurrentCharacter before using any of the dispatch methods.
+ * - rdi : current position in input, as negative offset from end of string.
+ *         Please notice that this is the byte offset, not the character
+ *         offset! Is always a 32-bit signed (negative) offset, but must be
+ *         maintained sign-extended to 64 bits, since it is used as index.
+ * - rsi : end of input (points to byte after last character in input),
+ *         so that rsi+rdi points to the current character.
+ * - rbp : frame pointer. Used to access arguments, local variables and
+ *         RegExp registers.
+ * - rsp : points to tip of C stack.
+ * - rcx : points to tip of backtrack stack. The backtrack stack contains
+ *         only 32-bit values. Most are offsets from some base (e.g., character
+ *         positions from end of string or code location from Code* pointer).
+ * - r8  : code object pointer. Used to convert between absolute and
+ *         code-object-relative addresses.
+ *
+ * The registers rax, rbx, rcx, r9 and r11 are free to use for computations.
+ * If changed to use r12+, they should be saved as callee-save registers.
+ *
+ * Each call to a C++ method should retain these registers.
+ *
+ * The stack will have the following content, in some order, indexable from the
+ * frame pointer (see, e.g., kStackHighEnd):
+ *    - stack_area_base       (High end of the memory area to use as
+ *                             backtracking stack)
+ *    - at_start              (if 1, start at start of string, if 0, don't)
+ *    - int* capture_array    (int[num_saved_registers_], for output).
+ *    - end of input          (Address of end of string)
+ *    - start of input        (Address of first character in string)
+ *    - String** input_string (location of a handle containing the string)
+ *    - return address
+ *    - backup of callee save registers (rbx, possibly rsi and rdi).
+ *    - Offset of location before start of input (effectively character
+ *      position -1). Used to initialize capture registers to a non-position.
+ *    - register 0  rbp[-n]   (Only positions must be stored in the first
+ *    - register 1  rbp[-n-8]  num_saved_registers_ registers)
+ *    - ...
+ *
+ * The first num_saved_registers_ registers are initialized to point to
+ * "character -1" in the string (i.e., char_size() bytes before the first
+ * character of the string). The remaining registers starts out uninitialized.
+ *
+ * The first seven values must be provided by the calling code by
+ * calling the code's entry address cast to a function pointer with the
+ * following signature:
+ * int (*match)(String* input_string,
+ *              Address start,
+ *              Address end,
+ *              int* capture_output_array,
+ *              bool at_start,
+ *              byte* stack_area_base)
+ */
+
+#define __ ACCESS_MASM(masm_)
+
+RegExpMacroAssemblerX64::RegExpMacroAssemblerX64(
+    Mode mode,
+    int registers_to_save)
+    : masm_(new MacroAssembler(NULL, kRegExpCodeSize)),
+      code_relative_fixup_positions_(4),
+      mode_(mode),
+      num_registers_(registers_to_save),
+      num_saved_registers_(registers_to_save),
+      entry_label_(),
+      start_label_(),
+      success_label_(),
+      backtrack_label_(),
+      exit_label_() {
+  __ jmp(&entry_label_);   // We'll write the entry code when we know more.
+  __ bind(&start_label_);  // And then continue from here.
+}
+
+
+RegExpMacroAssemblerX64::~RegExpMacroAssemblerX64() {
+  delete masm_;
+  // Unuse labels in case we throw away the assembler without calling GetCode.
+  entry_label_.Unuse();
+  start_label_.Unuse();
+  success_label_.Unuse();
+  backtrack_label_.Unuse();
+  exit_label_.Unuse();
+  check_preempt_label_.Unuse();
+  stack_overflow_label_.Unuse();
+}
+
+
+int RegExpMacroAssemblerX64::stack_limit_slack()  {
+  return RegExpStack::kStackLimitSlack;
+}
+
+
+void RegExpMacroAssemblerX64::AdvanceCurrentPosition(int by) {
+  if (by != 0) {
+    Label inside_string;
+    __ addq(rdi, Immediate(by * char_size()));
+  }
+}
+
+
+void RegExpMacroAssemblerX64::AdvanceRegister(int reg, int by) {
+  ASSERT(reg >= 0);
+  ASSERT(reg < num_registers_);
+  if (by != 0) {
+    __ addq(register_location(reg), Immediate(by));
+  }
+}
+
+
+void RegExpMacroAssemblerX64::Backtrack() {
+  CheckPreemption();
+  // Pop Code* offset from backtrack stack, add Code* and jump to location.
+  Pop(rbx);
+  __ addq(rbx, code_object_pointer());
+  __ jmp(rbx);
+}
+
+
+void RegExpMacroAssemblerX64::Bind(Label* label) {
+  __ bind(label);
+}
+
+
+void RegExpMacroAssemblerX64::CheckCharacter(uint32_t c, Label* on_equal) {
+  __ cmpl(current_character(), Immediate(c));
+  BranchOrBacktrack(equal, on_equal);
+}
+
+
+void RegExpMacroAssemblerX64::CheckCharacterGT(uc16 limit, Label* on_greater) {
+  __ cmpl(current_character(), Immediate(limit));
+  BranchOrBacktrack(greater, on_greater);
+}
+
+
+void RegExpMacroAssemblerX64::CheckAtStart(Label* on_at_start) {
+  Label not_at_start;
+  // Did we start the match at the start of the string at all?
+  __ cmpb(Operand(rbp, kAtStart), Immediate(0));
+  BranchOrBacktrack(equal, &not_at_start);
+  // If we did, are we still at the start of the input?
+  __ lea(rax, Operand(rsi, rdi, times_1, 0));
+  __ cmpq(rax, Operand(rbp, kInputStart));
+  BranchOrBacktrack(equal, on_at_start);
+  __ bind(&not_at_start);
+}
+
+
+void RegExpMacroAssemblerX64::CheckNotAtStart(Label* on_not_at_start) {
+  // Did we start the match at the start of the string at all?
+  __ cmpb(Operand(rbp, kAtStart), Immediate(0));
+  BranchOrBacktrack(equal, on_not_at_start);
+  // If we did, are we still at the start of the input?
+  __ lea(rax, Operand(rsi, rdi, times_1, 0));
+  __ cmpq(rax, Operand(rbp, kInputStart));
+  BranchOrBacktrack(not_equal, on_not_at_start);
+}
+
+
+void RegExpMacroAssemblerX64::CheckCharacterLT(uc16 limit, Label* on_less) {
+  __ cmpl(current_character(), Immediate(limit));
+  BranchOrBacktrack(less, on_less);
+}
+
+
+void RegExpMacroAssemblerX64::CheckCharacters(Vector<const uc16> str,
+                                              int cp_offset,
+                                              Label* on_failure,
+                                              bool check_end_of_string) {
+  int byte_length = str.length() * char_size();
+  int byte_offset = cp_offset * char_size();
+  if (check_end_of_string) {
+    // Check that there are at least str.length() characters left in the input.
+    __ cmpl(rdi, Immediate(-(byte_offset + byte_length)));
+    BranchOrBacktrack(greater, on_failure);
+  }
+
+  if (on_failure == NULL) {
+    // Instead of inlining a backtrack, (re)use the global backtrack target.
+    on_failure = &backtrack_label_;
+  }
+
+  // TODO(lrn): Test multiple characters at a time by loading 4 or 8 bytes
+  // at a time.
+  for (int i = 0; i < str.length(); i++) {
+    if (mode_ == ASCII) {
+      __ cmpb(Operand(rsi, rdi, times_1, byte_offset + i),
+              Immediate(static_cast<int8_t>(str[i])));
+    } else {
+      ASSERT(mode_ == UC16);
+      __ cmpw(Operand(rsi, rdi, times_1, byte_offset + i * sizeof(uc16)),
+              Immediate(str[i]));
+    }
+    BranchOrBacktrack(not_equal, on_failure);
+  }
+}
+
+
+void RegExpMacroAssemblerX64::CheckGreedyLoop(Label* on_equal) {
+  Label fallthrough;
+  __ cmpl(rdi, Operand(backtrack_stackpointer(), 0));
+  __ j(not_equal, &fallthrough);
+  Drop();
+  BranchOrBacktrack(no_condition, on_equal);
+  __ bind(&fallthrough);
+}
+
+
+void RegExpMacroAssemblerX64::CheckNotBackReferenceIgnoreCase(
+    int start_reg,
+    Label* on_no_match) {
+  Label fallthrough;
+  __ movq(rdx, register_location(start_reg));  // Offset of start of capture
+  __ movq(rbx, register_location(start_reg + 1));  // Offset of end of capture
+  __ subq(rbx, rdx);  // Length of capture.
+
+  // -----------------------
+  // rdx  = Start offset of capture.
+  // rbx = Length of capture
+
+  // If length is negative, this code will fail (it's a symptom of a partial or
+  // illegal capture where start of capture after end of capture).
+  // This must not happen (no back-reference can reference a capture that wasn't
+  // closed before in the reg-exp, and we must not generate code that can cause
+  // this condition).
+
+  // If length is zero, either the capture is empty or it is nonparticipating.
+  // In either case succeed immediately.
+  __ j(equal, &fallthrough);
+
+  if (mode_ == ASCII) {
+    Label loop_increment;
+    if (on_no_match == NULL) {
+      on_no_match = &backtrack_label_;
+    }
+
+    __ lea(r9, Operand(rsi, rdx, times_1, 0));
+    __ lea(r11, Operand(rsi, rdi, times_1, 0));
+    __ addq(rbx, r9);  // End of capture
+    // ---------------------
+    // r11 - current input character address
+    // r9 - current capture character address
+    // rbx - end of capture
+
+    Label loop;
+    __ bind(&loop);
+    __ movzxbl(rdx, Operand(r9, 0));
+    __ movzxbl(rax, Operand(r11, 0));
+    // al - input character
+    // dl - capture character
+    __ cmpb(rax, rdx);
+    __ j(equal, &loop_increment);
+
+    // Mismatch, try case-insensitive match (converting letters to lower-case).
+    // I.e., if or-ing with 0x20 makes values equal and in range 'a'-'z', it's
+    // a match.
+    __ or_(rax, Immediate(0x20));  // Convert match character to lower-case.
+    __ or_(rdx, Immediate(0x20));  // Convert capture character to lower-case.
+    __ cmpb(rax, rdx);
+    __ j(not_equal, on_no_match);  // Definitely not equal.
+    __ subb(rax, Immediate('a'));
+    __ cmpb(rax, Immediate('z' - 'a'));
+    __ j(above, on_no_match);  // Weren't letters anyway.
+
+    __ bind(&loop_increment);
+    // Increment pointers into match and capture strings.
+    __ addq(r11, Immediate(1));
+    __ addq(r9, Immediate(1));
+    // Compare to end of capture, and loop if not done.
+    __ cmpq(r9, rbx);
+    __ j(below, &loop);
+
+    // Compute new value of character position after the matched part.
+    __ movq(rdi, r11);
+    __ subq(rdi, rsi);
+  } else {
+    ASSERT(mode_ == UC16);
+    // Save important/volatile registers before calling C function.
+#ifndef __MSVC__
+    // Callee save on Win64
+    __ push(rsi);
+    __ push(rdi);
+#endif
+    __ push(backtrack_stackpointer());
+
+    int num_arguments = 3;
+    FrameAlign(num_arguments);
+
+    // Put arguments into parameter registers. Parameters are
+    //   Address byte_offset1 - Address captured substring's start.
+    //   Address byte_offset2 - Address of current character position.
+    //   size_t byte_length - length of capture in bytes(!)
+#ifdef __MSVC__
+    // Compute and set byte_offset1 (start of capture).
+    __ lea(rcx, Operand(rsi, rdx, times_1, 0));
+    // Set byte_offset2.
+    __ lea(rdx, Operand(rsi, rdi, times_1, 0));
+    // Set byte_length.
+    __ movq(r8, rbx);
+#else  // AMD64 calling convention
+    // Compute byte_offset2 (current position = rsi+rdi).
+    __ lea(rax, Operand(rsi, rdi, times_1, 0));
+    // Compute and set byte_offset1 (start of capture).
+    __ lea(rdi, Operand(rsi, rdx, times_1, 0));
+    // Set byte_offset2.
+    __ movq(rsi, rax);
+    // Set byte_length.
+    __ movq(rdx, rbx);
+#endif
+    Address function_address = FUNCTION_ADDR(&CaseInsensitiveCompareUC16);
+    CallCFunction(function_address, num_arguments);
+
+    // Restore original values before reacting on result value.
+    __ Move(code_object_pointer(), masm_->CodeObject());
+    __ pop(backtrack_stackpointer());
+#ifndef __MSVC__
+    __ pop(rdi);
+    __ pop(rsi);
+#endif
+
+    // Check if function returned non-zero for success or zero for failure.
+    __ testq(rax, rax);
+    BranchOrBacktrack(zero, on_no_match);
+    // On success, increment position by length of capture.
+    // Requires that rbx is callee save (true for both Win64 and AMD64 ABIs).
+    __ addq(rdi, rbx);
+  }
+  __ bind(&fallthrough);
+}
+
+
+void RegExpMacroAssemblerX64::CheckNotBackReference(
+    int start_reg,
+    Label* on_no_match) {
+  Label fallthrough;
+
+  // Find length of back-referenced capture.
+  __ movq(rdx, register_location(start_reg));
+  __ movq(rax, register_location(start_reg + 1));
+  __ subq(rax, rdx);  // Length to check.
+
+  // Fail on partial or illegal capture (start of capture after end of capture).
+  // This must not happen (no back-reference can reference a capture that wasn't
+  // closed before in the reg-exp).
+  __ Check(greater_equal, "Invalid capture referenced");
+
+  // Succeed on empty capture (including non-participating capture)
+  __ j(equal, &fallthrough);
+
+  // -----------------------
+  // rdx - Start of capture
+  // rax - length of capture
+
+  // Check that there are sufficient characters left in the input.
+  __ movl(rbx, rdi);
+  __ addl(rbx, rax);
+  BranchOrBacktrack(greater, on_no_match);
+
+  // Compute pointers to match string and capture string
+  __ lea(rbx, Operand(rsi, rdi, times_1, 0));  // Start of match.
+  __ addq(rdx, rsi);  // Start of capture.
+  __ lea(r9, Operand(rdx, rax, times_1, 0));  // End of capture
+
+  // -----------------------
+  // rbx - current capture character address.
+  // rbx - current input character address .
+  // r9 - end of input to match (capture length after rbx).
+
+  Label loop;
+  __ bind(&loop);
+  if (mode_ == ASCII) {
+    __ movzxbl(rax, Operand(rdx, 0));
+    __ cmpb(rax, Operand(rbx, 0));
+  } else {
+    ASSERT(mode_ == UC16);
+    __ movzxwl(rax, Operand(rdx, 0));
+    __ cmpw(rax, Operand(rbx, 0));
+  }
+  BranchOrBacktrack(not_equal, on_no_match);
+  // Increment pointers into capture and match string.
+  __ addq(rbx, Immediate(char_size()));
+  __ addq(rdx, Immediate(char_size()));
+  // Check if we have reached end of match area.
+  __ cmpq(rdx, r9);
+  __ j(below, &loop);
+
+  // Success.
+  // Set current character position to position after match.
+  __ movq(rdi, rbx);
+  __ subq(rdi, rsi);
+
+  __ bind(&fallthrough);
+}
+
+
+void RegExpMacroAssemblerX64::CheckNotRegistersEqual(int reg1,
+                                                     int reg2,
+                                                     Label* on_not_equal) {
+  __ movq(rax, register_location(reg1));
+  __ cmpq(rax, register_location(reg2));
+  BranchOrBacktrack(not_equal, on_not_equal);
+}
+
+
+void RegExpMacroAssemblerX64::CheckNotCharacter(uint32_t c,
+                                                Label* on_not_equal) {
+  __ cmpl(current_character(), Immediate(c));
+  BranchOrBacktrack(not_equal, on_not_equal);
+}
+
+
+void RegExpMacroAssemblerX64::CheckCharacterAfterAnd(uint32_t c,
+                                                     uint32_t mask,
+                                                     Label* on_equal) {
+  __ movl(rax, current_character());
+  __ and_(rax, Immediate(mask));
+  __ cmpl(rax, Immediate(c));
+  BranchOrBacktrack(equal, on_equal);
+}
+
+
+void RegExpMacroAssemblerX64::CheckNotCharacterAfterAnd(uint32_t c,
+                                                        uint32_t mask,
+                                                        Label* on_not_equal) {
+  __ movl(rax, current_character());
+  __ and_(rax, Immediate(mask));
+  __ cmpl(rax, Immediate(c));
+  BranchOrBacktrack(not_equal, on_not_equal);
+}
+
+
+void RegExpMacroAssemblerX64::CheckNotCharacterAfterMinusAnd(
+    uc16 c,
+    uc16 minus,
+    uc16 mask,
+    Label* on_not_equal) {
+  ASSERT(minus < String::kMaxUC16CharCode);
+  __ lea(rax, Operand(current_character(), -minus));
+  __ and_(rax, Immediate(mask));
+  __ cmpl(rax, Immediate(c));
+  BranchOrBacktrack(not_equal, on_not_equal);
+}
+
+
+bool RegExpMacroAssemblerX64::CheckSpecialCharacterClass(uc16 type,
+                                                         int cp_offset,
+                                                         bool check_offset,
+                                                         Label* on_no_match) {
+  // Range checks (c in min..max) are generally implemented by an unsigned
+  // (c - min) <= (max - min) check
+  switch (type) {
+  case 's':
+    // Match space-characters
+    if (mode_ == ASCII) {
+      // ASCII space characters are '\t'..'\r' and ' '.
+      if (check_offset) {
+        LoadCurrentCharacter(cp_offset, on_no_match);
+      } else {
+        LoadCurrentCharacterUnchecked(cp_offset, 1);
+      }
+      Label success;
+      __ cmpl(current_character(), Immediate(' '));
+      __ j(equal, &success);
+      // Check range 0x09..0x0d
+      __ subl(current_character(), Immediate('\t'));
+      __ cmpl(current_character(), Immediate('\r' - '\t'));
+      BranchOrBacktrack(above, on_no_match);
+      __ bind(&success);
+      return true;
+    }
+    return false;
+  case 'S':
+    // Match non-space characters.
+    if (check_offset) {
+      LoadCurrentCharacter(cp_offset, on_no_match, 1);
+    } else {
+      LoadCurrentCharacterUnchecked(cp_offset, 1);
+    }
+    if (mode_ == ASCII) {
+      // ASCII space characters are '\t'..'\r' and ' '.
+      __ cmpl(current_character(), Immediate(' '));
+      BranchOrBacktrack(equal, on_no_match);
+      __ subl(current_character(), Immediate('\t'));
+      __ cmpl(current_character(), Immediate('\r' - '\t'));
+      BranchOrBacktrack(below_equal, on_no_match);
+      return true;
+    }
+    return false;
+  case 'd':
+    // Match ASCII digits ('0'..'9')
+    if (check_offset) {
+      LoadCurrentCharacter(cp_offset, on_no_match, 1);
+    } else {
+      LoadCurrentCharacterUnchecked(cp_offset, 1);
+    }
+    __ subl(current_character(), Immediate('0'));
+    __ cmpl(current_character(), Immediate('9' - '0'));
+    BranchOrBacktrack(above, on_no_match);
+    return true;
+  case 'D':
+    // Match non ASCII-digits
+    if (check_offset) {
+      LoadCurrentCharacter(cp_offset, on_no_match, 1);
+    } else {
+      LoadCurrentCharacterUnchecked(cp_offset, 1);
+    }
+    __ subl(current_character(), Immediate('0'));
+    __ cmpl(current_character(), Immediate('9' - '0'));
+    BranchOrBacktrack(below_equal, on_no_match);
+    return true;
+  case '.': {
+    // Match non-newlines (not 0x0a('\n'), 0x0d('\r'), 0x2028 and 0x2029)
+    if (check_offset) {
+      LoadCurrentCharacter(cp_offset, on_no_match, 1);
+    } else {
+      LoadCurrentCharacterUnchecked(cp_offset, 1);
+    }
+    __ xor_(current_character(), Immediate(0x01));
+    // See if current character is '\n'^1 or '\r'^1, i.e., 0x0b or 0x0c
+    __ subl(current_character(), Immediate(0x0b));
+    __ cmpl(current_character(), Immediate(0x0c - 0x0b));
+    BranchOrBacktrack(below_equal, on_no_match);
+    if (mode_ == UC16) {
+      // Compare original value to 0x2028 and 0x2029, using the already
+      // computed (current_char ^ 0x01 - 0x0b). I.e., check for
+      // 0x201d (0x2028 - 0x0b) or 0x201e.
+      __ subl(current_character(), Immediate(0x2028 - 0x0b));
+      __ cmpl(current_character(), Immediate(1));
+      BranchOrBacktrack(below_equal, on_no_match);
+    }
+    return true;
+  }
+  case '*':
+    // Match any character.
+    if (check_offset) {
+      CheckPosition(cp_offset, on_no_match);
+    }
+    return true;
+  // No custom implementation (yet): w, W, s(UC16), S(UC16).
+  default:
+    return false;
+  }
+}
+
+
+void RegExpMacroAssemblerX64::Fail() {
+  ASSERT(FAILURE == 0);  // Return value for failure is zero.
+  __ xor_(rax, rax);  // zero rax.
+  __ jmp(&exit_label_);
+}
+
+
+Handle<Object> RegExpMacroAssemblerX64::GetCode(Handle<String> source) {
+  // Finalize code - write the entry point code now we know how many
+  // registers we need.
+
+  // Entry code:
+  __ bind(&entry_label_);
+  // Start new stack frame.
+  __ push(rbp);
+  __ movq(rbp, rsp);
+  // Save parameters and callee-save registers. Order here should correspond
+  //  to order of kBackup_ebx etc.
+#ifdef __MSVC__
+  // MSVC passes arguments in rcx, rdx, r8, r9, with backing stack slots.
+  // Store register parameters in pre-allocated stack slots,
+  __ movq(Operand(rbp, kInputString), rcx);
+  __ movq(Operand(rbp, kStartIndex), rdx);
+  __ movq(Operand(rbp, kInputStart), r8);
+  __ movq(Operand(rbp, kInputEnd), r9);
+  // Callee-save on Win64.
+  __ push(rsi);
+  __ push(rdi);
+  __ push(rbx);
+#else
+  // GCC passes arguments in rdi, rsi, rdx, rcx, r8, r9 (and then on stack).
+  // Push register parameters on stack for reference.
+  ASSERT_EQ(kInputString, -1 * kPointerSize);
+  ASSERT_EQ(kStartIndex, -2 * kPointerSize);
+  ASSERT_EQ(kInputStart, -3 * kPointerSize);
+  ASSERT_EQ(kInputEnd, -4 * kPointerSize);
+  ASSERT_EQ(kRegisterOutput, -5 * kPointerSize);
+  ASSERT_EQ(kAtStart, -6 * kPointerSize);
+  __ push(rdi);
+  __ push(rsi);
+  __ push(rdx);
+  __ push(rcx);
+  __ push(r8);
+  __ push(r9);
+
+  __ push(rbx);  // Callee-save
+#endif
+  __ push(Immediate(0));  // Make room for "input start - 1" constant.
+
+  // Check if we have space on the stack for registers.
+  Label stack_limit_hit;
+  Label stack_ok;
+
+  ExternalReference stack_guard_limit =
+      ExternalReference::address_of_stack_guard_limit();
+  __ movq(rcx, rsp);
+  __ movq(kScratchRegister, stack_guard_limit);
+  __ subq(rcx, Operand(kScratchRegister, 0));
+  // Handle it if the stack pointer is already below the stack limit.
+  __ j(below_equal, &stack_limit_hit);
+  // Check if there is room for the variable number of registers above
+  // the stack limit.
+  __ cmpq(rcx, Immediate(num_registers_ * kPointerSize));
+  __ j(above_equal, &stack_ok);
+  // Exit with OutOfMemory exception. There is not enough space on the stack
+  // for our working registers.
+  __ movq(rax, Immediate(EXCEPTION));
+  __ jmp(&exit_label_);
+
+  __ bind(&stack_limit_hit);
+  __ Move(code_object_pointer(), masm_->CodeObject());
+  CallCheckStackGuardState();  // Preserves no registers beside rbp and rsp.
+  __ testq(rax, rax);
+  // If returned value is non-zero, we exit with the returned value as result.
+  __ j(not_zero, &exit_label_);
+
+  __ bind(&stack_ok);
+
+  // Allocate space on stack for registers.
+  __ subq(rsp, Immediate(num_registers_ * kPointerSize));
+  // Load string length.
+  __ movq(rsi, Operand(rbp, kInputEnd));
+  // Load input position.
+  __ movq(rdi, Operand(rbp, kInputStart));
+  // Set up rdi to be negative offset from string end.
+  __ subq(rdi, rsi);
+  // Set rax to address of char before start of input
+  // (effectively string position -1).
+  __ lea(rax, Operand(rdi, -char_size()));
+  // Store this value in a local variable, for use when clearing
+  // position registers.
+  __ movq(Operand(rbp, kInputStartMinusOne), rax);
+  if (num_saved_registers_ > 0) {
+    // Fill saved registers with initial value = start offset - 1
+    // Fill in stack push order, to avoid accessing across an unwritten
+    // page (a problem on Windows).
+    __ movq(rcx, Immediate(kRegisterZero));
+    Label init_loop;
+    __ bind(&init_loop);
+    __ movq(Operand(rbp, rcx, times_1, 0), rax);
+    __ subq(rcx, Immediate(kPointerSize));
+    __ cmpq(rcx,
+            Immediate(kRegisterZero - num_saved_registers_ * kPointerSize));
+    __ j(greater, &init_loop);
+  }
+  // Ensure that we have written to each stack page, in order. Skipping a page
+  // on Windows can cause segmentation faults. Assuming page size is 4k.
+  const int kPageSize = 4096;
+  const int kRegistersPerPage = kPageSize / kPointerSize;
+  for (int i = num_saved_registers_ + kRegistersPerPage - 1;
+      i < num_registers_;
+      i += kRegistersPerPage) {
+    __ movq(register_location(i), rax);  // One write every page.
+  }
+
+  // Initialize backtrack stack pointer.
+  __ movq(backtrack_stackpointer(), Operand(rbp, kStackHighEnd));
+  // Initialize code object pointer.
+  __ Move(code_object_pointer(), masm_->CodeObject());
+  // Load previous char as initial value of current-character.
+  Label at_start;
+  __ cmpq(Operand(rbp, kAtStart), Immediate(0));
+  __ j(not_equal, &at_start);
+  LoadCurrentCharacterUnchecked(-1, 1);  // Load previous char.
+  __ jmp(&start_label_);
+  __ bind(&at_start);
+  __ movq(current_character(), Immediate('\n'));
+  __ jmp(&start_label_);
+
+
+  // Exit code:
+  if (success_label_.is_linked()) {
+    // Save captures when successful.
+    __ bind(&success_label_);
+    if (num_saved_registers_ > 0) {
+      // copy captures to output
+      __ movq(rbx, Operand(rbp, kRegisterOutput));
+      __ movq(rcx, Operand(rbp, kInputEnd));
+      __ subq(rcx, Operand(rbp, kInputStart));
+      for (int i = 0; i < num_saved_registers_; i++) {
+        __ movq(rax, register_location(i));
+        __ addq(rax, rcx);  // Convert to index from start, not end.
+        if (mode_ == UC16) {
+          __ sar(rax, Immediate(1));  // Convert byte index to character index.
+        }
+        __ movl(Operand(rbx, i * kIntSize), rax);
+      }
+    }
+    __ movq(rax, Immediate(SUCCESS));
+  }
+
+  // Exit and return rax
+  __ bind(&exit_label_);
+
+#ifdef __MSVC__
+  // Restore callee save registers.
+  __ lea(rsp, Operand(rbp, kLastCalleeSaveRegister));
+  __ pop(rbx);
+  __ pop(rdi);
+  __ pop(rsi);
+  // Stack now at rbp.
+#else
+  // Restore callee save register.
+  __ movq(rbx, Operand(rbp, kBackup_rbx));
+  // Skip rsp to rbp.
+  __ movq(rsp, rbp);
+#endif
+  // Exit function frame, restore previous one.
+  __ pop(rbp);
+  __ ret(0);
+
+  // Backtrack code (branch target for conditional backtracks).
+  if (backtrack_label_.is_linked()) {
+    __ bind(&backtrack_label_);
+    Backtrack();
+  }
+
+  Label exit_with_exception;
+
+  // Preempt-code
+  if (check_preempt_label_.is_linked()) {
+    SafeCallTarget(&check_preempt_label_);
+
+    __ push(backtrack_stackpointer());
+    __ push(rdi);
+
+    CallCheckStackGuardState();
+    __ testq(rax, rax);
+    // If returning non-zero, we should end execution with the given
+    // result as return value.
+    __ j(not_zero, &exit_label_);
+
+    // Restore registers.
+    __ Move(code_object_pointer(), masm_->CodeObject());
+    __ pop(rdi);
+    __ pop(backtrack_stackpointer());
+    // String might have moved: Reload esi from frame.
+    __ movq(rsi, Operand(rbp, kInputEnd));
+    SafeReturn();
+  }
+
+  // Backtrack stack overflow code.
+  if (stack_overflow_label_.is_linked()) {
+    SafeCallTarget(&stack_overflow_label_);
+    // Reached if the backtrack-stack limit has been hit.
+
+    Label grow_failed;
+    // Save registers before calling C function
+#ifndef __MSVC__
+    // Callee-save in Microsoft 64-bit ABI, but not in AMD64 ABI.
+    __ push(rsi);
+    __ push(rdi);
+#endif
+
+    // Call GrowStack(backtrack_stackpointer())
+    int num_arguments = 2;
+    FrameAlign(num_arguments);
+#ifdef __MSVC__
+    // Microsoft passes parameters in rcx, rdx.
+    // First argument, backtrack stackpointer, is already in rcx.
+    __ lea(rdx, Operand(rbp, kStackHighEnd));  // Second argument
+#else
+    // AMD64 ABI passes paremeters in rdi, rsi.
+    __ movq(rdi, backtrack_stackpointer());   // First argument.
+    __ lea(rsi, Operand(rbp, kStackHighEnd));  // Second argument.
+#endif
+    CallCFunction(FUNCTION_ADDR(&GrowStack), num_arguments);
+    // If return NULL, we have failed to grow the stack, and
+    // must exit with a stack-overflow exception.
+    __ testq(rax, rax);
+    __ j(equal, &exit_with_exception);
+    // Otherwise use return value as new stack pointer.
+    __ movq(backtrack_stackpointer(), rax);
+    // Restore saved registers and continue.
+    __ Move(code_object_pointer(), masm_->CodeObject());
+#ifndef __MSVC__
+    __ pop(rdi);
+    __ pop(rsi);
+#endif
+    SafeReturn();
+  }
+
+  if (exit_with_exception.is_linked()) {
+    // If any of the code above needed to exit with an exception.
+    __ bind(&exit_with_exception);
+    // Exit with Result EXCEPTION(-1) to signal thrown exception.
+    __ movq(rax, Immediate(EXCEPTION));
+    __ jmp(&exit_label_);
+  }
+
+  FixupCodeRelativePositions();
+
+  CodeDesc code_desc;
+  masm_->GetCode(&code_desc);
+  Handle<Code> code = Factory::NewCode(code_desc,
+                                       NULL,
+                                       Code::ComputeFlags(Code::REGEXP),
+                                       masm_->CodeObject());
+  LOG(RegExpCodeCreateEvent(*code, *source));
+  return Handle<Object>::cast(code);
+}
+
+
+void RegExpMacroAssemblerX64::GoTo(Label* to) {
+  BranchOrBacktrack(no_condition, to);
+}
+
+
+void RegExpMacroAssemblerX64::IfRegisterGE(int reg,
+                                           int comparand,
+                                           Label* if_ge) {
+  __ cmpq(register_location(reg), Immediate(comparand));
+  BranchOrBacktrack(greater_equal, if_ge);
+}
+
+
+void RegExpMacroAssemblerX64::IfRegisterLT(int reg,
+                                           int comparand,
+                                           Label* if_lt) {
+  __ cmpq(register_location(reg), Immediate(comparand));
+  BranchOrBacktrack(less, if_lt);
+}
+
+
+void RegExpMacroAssemblerX64::IfRegisterEqPos(int reg,
+                                              Label* if_eq) {
+  __ cmpq(rdi, register_location(reg));
+  BranchOrBacktrack(equal, if_eq);
+}
+
+
+RegExpMacroAssembler::IrregexpImplementation
+    RegExpMacroAssemblerX64::Implementation() {
+  return kX64Implementation;
+}
+
+
+void RegExpMacroAssemblerX64::LoadCurrentCharacter(int cp_offset,
+                                                   Label* on_end_of_input,
+                                                   bool check_bounds,
+                                                   int characters) {
+  ASSERT(cp_offset >= -1);      // ^ and \b can look behind one character.
+  ASSERT(cp_offset < (1<<30));  // Be sane! (And ensure negation works)
+  CheckPosition(cp_offset + characters - 1, on_end_of_input);
+  LoadCurrentCharacterUnchecked(cp_offset, characters);
+}
+
+
+void RegExpMacroAssemblerX64::PopCurrentPosition() {
+  Pop(rdi);
+}
+
+
+void RegExpMacroAssemblerX64::PopRegister(int register_index) {
+  Pop(rax);
+  __ movq(register_location(register_index), rax);
+}
+
+
+void RegExpMacroAssemblerX64::PushBacktrack(Label* label) {
+  Push(label);
+  CheckStackLimit();
+}
+
+
+void RegExpMacroAssemblerX64::PushCurrentPosition() {
+  Push(rdi);
+}
+
+
+void RegExpMacroAssemblerX64::PushRegister(int register_index,
+                                           StackCheckFlag check_stack_limit) {
+  __ movq(rax, register_location(register_index));
+  Push(rax);
+  if (check_stack_limit) CheckStackLimit();
+}
+
+
+void RegExpMacroAssemblerX64::ReadCurrentPositionFromRegister(int reg) {
+  __ movq(rdi, register_location(reg));
+}
+
+
+void RegExpMacroAssemblerX64::ReadStackPointerFromRegister(int reg) {
+  __ movq(backtrack_stackpointer(), register_location(reg));
+  __ addq(backtrack_stackpointer(), Operand(rbp, kStackHighEnd));
+}
+
+
+void RegExpMacroAssemblerX64::SetRegister(int register_index, int to) {
+  ASSERT(register_index >= num_saved_registers_);  // Reserved for positions!
+  __ movq(register_location(register_index), Immediate(to));
+}
+
+
+void RegExpMacroAssemblerX64::Succeed() {
+  __ jmp(&success_label_);
+}
+
+
+void RegExpMacroAssemblerX64::WriteCurrentPositionToRegister(int reg,
+                                                             int cp_offset) {
+  if (cp_offset == 0) {
+    __ movq(register_location(reg), rdi);
+  } else {
+    __ lea(rax, Operand(rdi, cp_offset * char_size()));
+    __ movq(register_location(reg), rax);
+  }
+}
+
+
+void RegExpMacroAssemblerX64::ClearRegisters(int reg_from, int reg_to) {
+  ASSERT(reg_from <= reg_to);
+  __ movq(rax, Operand(rbp, kInputStartMinusOne));
+  for (int reg = reg_from; reg <= reg_to; reg++) {
+    __ movq(register_location(reg), rax);
+  }
+}
+
+
+void RegExpMacroAssemblerX64::WriteStackPointerToRegister(int reg) {
+  __ movq(rax, backtrack_stackpointer());
+  __ subq(rax, Operand(rbp, kStackHighEnd));
+  __ movq(register_location(reg), rax);
+}
+
+
+// Private methods:
+
+void RegExpMacroAssemblerX64::CallCheckStackGuardState() {
+  // This function call preserves no register values. Caller should
+  // store anything volatile in a C call or overwritten by this function.
+  int num_arguments = 3;
+  FrameAlign(num_arguments);
+#ifdef __MSVC__
+  // Second argument: Code* of self. (Do this before overwriting r8).
+  __ movq(rdx, code_object_pointer());
+  // Third argument: RegExp code frame pointer.
+  __ movq(r8, rbp);
+  // First argument: Next address on the stack (will be address of
+  // return address).
+  __ lea(rcx, Operand(rsp, -kPointerSize));
+#else
+  // Third argument: RegExp code frame pointer.
+  __ movq(rdx, rbp);
+  // Second argument: Code* of self.
+  __ movq(rsi, code_object_pointer());
+  // First argument: Next address on the stack (will be address of
+  // return address).
+  __ lea(rdi, Operand(rsp, -kPointerSize));
+#endif
+  CallCFunction(FUNCTION_ADDR(&CheckStackGuardState), num_arguments);
+}
+
+
+// Helper function for reading a value out of a stack frame.
+template <typename T>
+static T& frame_entry(Address re_frame, int frame_offset) {
+  return reinterpret_cast<T&>(Memory::int32_at(re_frame + frame_offset));
+}
+
+
+int RegExpMacroAssemblerX64::CheckStackGuardState(Address* return_address,
+                                                  Code* re_code,
+                                                  Address re_frame) {
+  if (StackGuard::IsStackOverflow()) {
+    Top::StackOverflow();
+    return EXCEPTION;
+  }
+
+  // If not real stack overflow the stack guard was used to interrupt
+  // execution for another purpose.
+
+  // Prepare for possible GC.
+  HandleScope handles;
+  Handle<Code> code_handle(re_code);
+
+  Handle<String> subject(frame_entry<String*>(re_frame, kInputString));
+  // Current string.
+  bool is_ascii = subject->IsAsciiRepresentation();
+
+  ASSERT(re_code->instruction_start() <= *return_address);
+  ASSERT(*return_address <=
+      re_code->instruction_start() + re_code->instruction_size());
+
+  Object* result = Execution::HandleStackGuardInterrupt();
+
+  if (*code_handle != re_code) {  // Return address no longer valid
+    intptr_t delta = *code_handle - re_code;
+    // Overwrite the return address on the stack.
+    *return_address += delta;
+  }
+
+  if (result->IsException()) {
+    return EXCEPTION;
+  }
+
+  // String might have changed.
+  if (subject->IsAsciiRepresentation() != 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).
+    return RETRY;
+  }
+
+  // Otherwise, the content of the string might have moved. It must still
+  // be a sequential or external string with the same content.
+  // Update the start and end pointers in the stack frame to the current
+  // location (whether it has actually moved or not).
+  ASSERT(StringShape(*subject).IsSequential() ||
+      StringShape(*subject).IsExternal());
+
+  // The original start address of the characters to match.
+  const byte* start_address = frame_entry<const byte*>(re_frame, kInputStart);
+
+  // Find the current start address of the same character at the current string
+  // position.
+  int start_index = frame_entry<int>(re_frame, kStartIndex);
+  const byte* new_address = StringCharacterPosition(*subject, start_index);
+
+  if (start_address != new_address) {
+    // If there is a difference, update the object pointer and start and end
+    // addresses in the RegExp stack frame to match the new value.
+    const byte* end_address = frame_entry<const byte* >(re_frame, kInputEnd);
+    int byte_length = end_address - start_address;
+    frame_entry<const String*>(re_frame, kInputString) = *subject;
+    frame_entry<const byte*>(re_frame, kInputStart) = new_address;
+    frame_entry<const byte*>(re_frame, kInputEnd) = new_address + byte_length;
+  }
+
+  return 0;
+}
+
+
+Address RegExpMacroAssemblerX64::GrowStack(Address stack_pointer,
+                                           Address* stack_base) {
+  size_t size = RegExpStack::stack_capacity();
+  Address old_stack_base = RegExpStack::stack_base();
+  ASSERT(old_stack_base == *stack_base);
+  ASSERT(stack_pointer <= old_stack_base);
+  ASSERT(static_cast<size_t>(old_stack_base - stack_pointer) <= size);
+  Address new_stack_base = RegExpStack::EnsureCapacity(size * 2);
+  if (new_stack_base == NULL) {
+    return NULL;
+  }
+  *stack_base = new_stack_base;
+  intptr_t stack_content_size = old_stack_base - stack_pointer;
+  return new_stack_base - stack_content_size;
+}
+
+
+Operand RegExpMacroAssemblerX64::register_location(int register_index) {
+  ASSERT(register_index < (1<<30));
+  if (num_registers_ <= register_index) {
+    num_registers_ = register_index + 1;
+  }
+  return Operand(rbp, kRegisterZero - register_index * kPointerSize);
+}
+
+
+void RegExpMacroAssemblerX64::CheckPosition(int cp_offset,
+                                            Label* on_outside_input) {
+  __ cmpl(rdi, Immediate(-cp_offset * char_size()));
+  BranchOrBacktrack(greater_equal, on_outside_input);
+}
+
+
+void RegExpMacroAssemblerX64::BranchOrBacktrack(Condition condition,
+                                                Label* to) {
+  if (condition < 0) {  // No condition
+    if (to == NULL) {
+      Backtrack();
+      return;
+    }
+    __ jmp(to);
+    return;
+  }
+  if (to == NULL) {
+    __ j(condition, &backtrack_label_);
+    return;
+  }
+  __ j(condition, to);
+}
+
+
+void RegExpMacroAssemblerX64::SafeCall(Label* to) {
+  __ call(to);
+}
+
+
+void RegExpMacroAssemblerX64::SafeCallTarget(Label* label) {
+  __ bind(label);
+  __ subq(Operand(rsp, 0), code_object_pointer());
+}
+
+
+void RegExpMacroAssemblerX64::SafeReturn() {
+  __ addq(Operand(rsp, 0), code_object_pointer());
+  __ ret(0);
+}
+
+
+void RegExpMacroAssemblerX64::Push(Register source) {
+  ASSERT(!source.is(backtrack_stackpointer()));
+  // Notice: This updates flags, unlike normal Push.
+  __ subq(backtrack_stackpointer(), Immediate(kIntSize));
+  __ movl(Operand(backtrack_stackpointer(), 0), source);
+}
+
+
+void RegExpMacroAssemblerX64::Push(Immediate value) {
+  // Notice: This updates flags, unlike normal Push.
+  __ subq(backtrack_stackpointer(), Immediate(kIntSize));
+  __ movl(Operand(backtrack_stackpointer(), 0), value);
+}
+
+
+void RegExpMacroAssemblerX64::FixupCodeRelativePositions() {
+  for (int i = 0, n = code_relative_fixup_positions_.length(); i < n; i++) {
+    int position = code_relative_fixup_positions_[i];
+    // The position succeeds a relative label offset from position.
+    // Patch the relative offset to be relative to the Code object pointer
+    // instead.
+    int patch_position = position - kIntSize;
+    int offset = masm_->long_at(patch_position);
+    masm_->long_at_put(patch_position,
+                       offset
+                       + position
+                       + Code::kHeaderSize
+                       - kHeapObjectTag);
+  }
+  code_relative_fixup_positions_.Clear();
+}
+
+
+void RegExpMacroAssemblerX64::Push(Label* backtrack_target) {
+  __ subq(backtrack_stackpointer(), Immediate(kIntSize));
+  __ movl(Operand(backtrack_stackpointer(), 0), backtrack_target);
+  MarkPositionForCodeRelativeFixup();
+}
+
+
+void RegExpMacroAssemblerX64::Pop(Register target) {
+  ASSERT(!target.is(backtrack_stackpointer()));
+  __ movsxlq(target, Operand(backtrack_stackpointer(), 0));
+  // Notice: This updates flags, unlike normal Pop.
+  __ addq(backtrack_stackpointer(), Immediate(kIntSize));
+}
+
+
+void RegExpMacroAssemblerX64::Drop() {
+  __ addq(backtrack_stackpointer(), Immediate(kIntSize));
+}
+
+
+void RegExpMacroAssemblerX64::CheckPreemption() {
+  // Check for preemption.
+  Label no_preempt;
+  ExternalReference stack_guard_limit =
+      ExternalReference::address_of_stack_guard_limit();
+  __ load_rax(stack_guard_limit);
+  __ cmpq(rsp, rax);
+  __ j(above, &no_preempt);
+
+  SafeCall(&check_preempt_label_);
+
+  __ bind(&no_preempt);
+}
+
+
+void RegExpMacroAssemblerX64::CheckStackLimit() {
+  if (FLAG_check_stack) {
+    Label no_stack_overflow;
+    ExternalReference stack_limit =
+        ExternalReference::address_of_regexp_stack_limit();
+    __ load_rax(stack_limit);
+    __ cmpq(backtrack_stackpointer(), rax);
+    __ j(above, &no_stack_overflow);
+
+    SafeCall(&stack_overflow_label_);
+
+    __ bind(&no_stack_overflow);
+  }
+}
+
+
+void RegExpMacroAssemblerX64::FrameAlign(int num_arguments) {
+  // TODO(lrn): Since we no longer use the system stack arbitrarily (but we do
+  // use it, e.g., for SafeCall), we know the number of elements on the stack
+  // since the last frame alignment. We might be able to do this simpler then.
+  int frameAlignment = OS::ActivationFrameAlignment();
+  ASSERT(frameAlignment != 0);
+  // Make stack end at alignment and make room for num_arguments pointers
+  // (on Win64 only) and the original value of rsp.
+  __ movq(kScratchRegister, rsp);
+  ASSERT(IsPowerOf2(frameAlignment));
+#ifdef __MSVC__
+  // Allocate space for parameters and old rsp.
+  __ subq(rsp, Immediate((num_arguments + 1) * kPointerSize));
+  __ and_(rsp, -frameAlignment);
+  __ movq(Operand(rsp, num_arguments * kPointerSize), kScratchRegister);
+#else
+  // Allocate space for old rsp.
+  __ subq(rsp, Immediate(kPointerSize));
+  __ and_(rsp, Immediate(-frameAlignment));
+  __ movq(Operand(rsp, 0), kScratchRegister);
+#endif
+}
+
+
+void RegExpMacroAssemblerX64::CallCFunction(Address function_address,
+                                            int num_arguments) {
+  // Don't compile regexps with serialization enabled. The addresses of the C++
+  // function being called isn't relocatable.
+  ASSERT(!Serializer::enabled());
+  __ movq(rax, reinterpret_cast<intptr_t>(function_address), RelocInfo::NONE);
+  __ call(rax);
+  ASSERT(OS::ActivationFrameAlignment() != 0);
+#ifdef __MSVC__
+  __ movq(rsp, Operand(rsp, num_arguments * kPointerSize));
+#else
+  __ pop(rsp);
+#endif
+}
+
+
+void RegExpMacroAssemblerX64::LoadCurrentCharacterUnchecked(int cp_offset,
+                                                            int characters) {
+  if (mode_ == ASCII) {
+    if (characters == 4) {
+      __ movl(current_character(), Operand(rsi, rdi, times_1, cp_offset));
+    } else if (characters == 2) {
+      __ movzxwl(current_character(), Operand(rsi, rdi, times_1, cp_offset));
+    } else {
+      ASSERT(characters == 1);
+      __ movzxbl(current_character(), Operand(rsi, rdi, times_1, cp_offset));
+    }
+  } else {
+    ASSERT(mode_ == UC16);
+    if (characters == 2) {
+      __ movl(current_character(),
+              Operand(rsi, rdi, times_1, cp_offset * sizeof(uc16)));
+    } else {
+      ASSERT(characters == 1);
+      __ movzxwl(current_character(),
+                 Operand(rsi, rdi, times_1, cp_offset * sizeof(uc16)));
+    }
+  }
+}
+
+
+#undef __
+}}  // namespace v8::internal
diff --git a/deps/v8/src/x64/regexp-macro-assembler-x64.h b/deps/v8/src/x64/regexp-macro-assembler-x64.h
index 209aa2d307..a270bc1865 100644
--- a/deps/v8/src/x64/regexp-macro-assembler-x64.h
+++ b/deps/v8/src/x64/regexp-macro-assembler-x64.h
@@ -25,3 +25,271 @@
 // (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_X64_REGEXP_MACRO_ASSEMBLER_X64_H_
+#define V8_X64_REGEXP_MACRO_ASSEMBLER_X64_H_
+
+namespace v8 {
+namespace internal {
+
+class RegExpMacroAssemblerX64: public NativeRegExpMacroAssembler {
+ public:
+  RegExpMacroAssemblerX64(Mode mode, int registers_to_save);
+  virtual ~RegExpMacroAssemblerX64();
+  virtual int stack_limit_slack();
+  virtual void AdvanceCurrentPosition(int by);
+  virtual void AdvanceRegister(int reg, int by);
+  virtual void Backtrack();
+  virtual void Bind(Label* label);
+  virtual void CheckAtStart(Label* on_at_start);
+  virtual void CheckCharacter(uint32_t c, Label* on_equal);
+  virtual void CheckCharacterAfterAnd(uint32_t c,
+                                      uint32_t mask,
+                                      Label* on_equal);
+  virtual void CheckCharacterGT(uc16 limit, Label* on_greater);
+  virtual void CheckCharacterLT(uc16 limit, Label* on_less);
+  virtual void CheckCharacters(Vector<const uc16> str,
+                               int cp_offset,
+                               Label* on_failure,
+                               bool check_end_of_string);
+  // A "greedy loop" is a loop that is both greedy and with a simple
+  // body. It has a particularly simple implementation.
+  virtual void CheckGreedyLoop(Label* on_tos_equals_current_position);
+  virtual void CheckNotAtStart(Label* on_not_at_start);
+  virtual void CheckNotBackReference(int start_reg, Label* on_no_match);
+  virtual void CheckNotBackReferenceIgnoreCase(int start_reg,
+                                               Label* on_no_match);
+  virtual void CheckNotRegistersEqual(int reg1, int reg2, Label* on_not_equal);
+  virtual void CheckNotCharacter(uint32_t c, Label* on_not_equal);
+  virtual void CheckNotCharacterAfterAnd(uint32_t c,
+                                         uint32_t mask,
+                                         Label* on_not_equal);
+  virtual void CheckNotCharacterAfterMinusAnd(uc16 c,
+                                              uc16 minus,
+                                              uc16 mask,
+                                              Label* on_not_equal);
+  // Checks whether the given offset from the current position is before
+  // the end of the string.
+  virtual void CheckPosition(int cp_offset, Label* on_outside_input);
+  virtual bool CheckSpecialCharacterClass(uc16 type,
+                                          int cp_offset,
+                                          bool check_offset,
+                                          Label* on_no_match);
+  virtual void Fail();
+  virtual Handle<Object> GetCode(Handle<String> source);
+  virtual void GoTo(Label* label);
+  virtual void IfRegisterGE(int reg, int comparand, Label* if_ge);
+  virtual void IfRegisterLT(int reg, int comparand, Label* if_lt);
+  virtual void IfRegisterEqPos(int reg, Label* if_eq);
+  virtual IrregexpImplementation Implementation();
+  virtual void LoadCurrentCharacter(int cp_offset,
+                                    Label* on_end_of_input,
+                                    bool check_bounds = true,
+                                    int characters = 1);
+  virtual void PopCurrentPosition();
+  virtual void PopRegister(int register_index);
+  virtual void PushBacktrack(Label* label);
+  virtual void PushCurrentPosition();
+  virtual void PushRegister(int register_index,
+                            StackCheckFlag check_stack_limit);
+  virtual void ReadCurrentPositionFromRegister(int reg);
+  virtual void ReadStackPointerFromRegister(int reg);
+  virtual void SetRegister(int register_index, int to);
+  virtual void Succeed();
+  virtual void WriteCurrentPositionToRegister(int reg, int cp_offset);
+  virtual void ClearRegisters(int reg_from, int reg_to);
+  virtual void WriteStackPointerToRegister(int reg);
+
+  static Result Match(Handle<Code> regexp,
+                      Handle<String> subject,
+                      int* offsets_vector,
+                      int offsets_vector_length,
+                      int previous_index);
+
+  static Result Execute(Code* code,
+                        String* input,
+                        int start_offset,
+                        const byte* input_start,
+                        const byte* input_end,
+                        int* output,
+                        bool at_start);
+
+ private:
+  // Offsets from rbp of function parameters and stored registers.
+  static const int kFramePointer = 0;
+  // Above the frame pointer - function parameters and return address.
+  static const int kReturn_eip = kFramePointer + kPointerSize;
+  static const int kFrameAlign = kReturn_eip + kPointerSize;
+
+#ifdef __MSVC__
+  // Parameters (first four passed as registers, but with room on stack).
+  // In Microsoft 64-bit Calling Convention, there is room on the callers
+  // stack (before the return address) to spill parameter registers. We
+  // use this space to store the register passed parameters.
+  static const int kInputString = kFrameAlign;
+  static const int kStartIndex = kInputString + kPointerSize;
+  static const int kInputStart = kStartIndex + kPointerSize;
+  static const int kInputEnd = kInputStart + kPointerSize;
+  static const int kRegisterOutput = kInputEnd + kPointerSize;
+  static const int kAtStart = kRegisterOutput + kPointerSize;
+  static const int kStackHighEnd = kAtStart + kPointerSize;
+#else
+  // In AMD64 ABI Calling Convention, the first six integer parameters
+  // are passed as registers, and caller must allocate space on the stack
+  // if it wants them stored. We push the parameters after the frame pointer.
+  static const int kInputString = kFramePointer - kPointerSize;
+  static const int kStartIndex = kInputString - kPointerSize;
+  static const int kInputStart = kStartIndex - kPointerSize;
+  static const int kInputEnd = kInputStart - kPointerSize;
+  static const int kRegisterOutput = kInputEnd - kPointerSize;
+  static const int kAtStart = kRegisterOutput - kPointerSize;
+  static const int kStackHighEnd = kFrameAlign;
+#endif
+
+#ifdef __MSVC__
+  // Microsoft calling convention has three callee-saved registers
+  // (that we are using). We push these after the frame pointer.
+  static const int kBackup_rsi = kFramePointer - kPointerSize;
+  static const int kBackup_rdi = kBackup_rsi - kPointerSize;
+  static const int kBackup_rbx = kBackup_rdi - kPointerSize;
+  static const int kLastCalleeSaveRegister = kBackup_rbx;
+#else
+  // AMD64 Calling Convention has only one callee-save register that
+  // we use. We push this after the frame pointer (and after the
+  // parameters).
+  static const int kBackup_rbx = kAtStart - kPointerSize;
+  static const int kLastCalleeSaveRegister = kBackup_rbx;
+#endif
+
+  // When adding local variables remember to push space for them in
+  // the frame in GetCode.
+  static const int kInputStartMinusOne =
+      kLastCalleeSaveRegister - kPointerSize;
+
+  // First register address. Following registers are below it on the stack.
+  static const int kRegisterZero = kInputStartMinusOne - kPointerSize;
+
+  // Initial size of code buffer.
+  static const size_t kRegExpCodeSize = 1024;
+
+  // Load a number of characters at the given offset from the
+  // current position, into the current-character register.
+  void LoadCurrentCharacterUnchecked(int cp_offset, int character_count);
+
+  // Check whether preemption has been requested.
+  void CheckPreemption();
+
+  // Check whether we are exceeding the stack limit on the backtrack stack.
+  void CheckStackLimit();
+
+  // Called from RegExp if the stack-guard is triggered.
+  // If the code object is relocated, the return address is fixed before
+  // returning.
+  static int CheckStackGuardState(Address* return_address,
+                                  Code* re_code,
+                                  Address re_frame);
+
+  // Generate a call to CheckStackGuardState.
+  void CallCheckStackGuardState();
+
+  // Called from RegExp if the backtrack stack limit is hit.
+  // Tries to expand the stack. Returns the new stack-pointer if
+  // successful, and updates the stack_top address, or returns 0 if unable
+  // to grow the stack.
+  // This function must not trigger a garbage collection.
+  static Address GrowStack(Address stack_pointer, Address* stack_top);
+
+  // The rbp-relative location of a regexp register.
+  Operand register_location(int register_index);
+
+  // The register containing the current character after LoadCurrentCharacter.
+  inline Register current_character() { return rdx; }
+
+  // The register containing the backtrack stack top. Provides a meaningful
+  // name to the register.
+  inline Register backtrack_stackpointer() { return rcx; }
+
+  // The registers containing a self pointer to this code's Code object.
+  inline Register code_object_pointer() { return r8; }
+
+  // Byte size of chars in the string to match (decided by the Mode argument)
+  inline int char_size() { return static_cast<int>(mode_); }
+
+  // Equivalent to a conditional branch to the label, unless the label
+  // is NULL, in which case it is a conditional Backtrack.
+  void BranchOrBacktrack(Condition condition, Label* to);
+
+  void MarkPositionForCodeRelativeFixup() {
+    code_relative_fixup_positions_.Add(masm_->pc_offset());
+  }
+
+  void FixupCodeRelativePositions();
+
+  // Call and return internally in the generated code in a way that
+  // is GC-safe (i.e., doesn't leave absolute code addresses on the stack)
+  inline void SafeCall(Label* to);
+  inline void SafeCallTarget(Label* label);
+  inline void SafeReturn();
+
+  // Pushes the value of a register on the backtrack stack. Decrements the
+  // stack pointer (rcx) by a word size and stores the register's value there.
+  inline void Push(Register source);
+
+  // Pushes a value on the backtrack stack. Decrements the stack pointer (rcx)
+  // by a word size and stores the value there.
+  inline void Push(Immediate value);
+
+  // Pushes the Code object relative offset of a label on the backtrack stack
+  // (i.e., a backtrack target). Decrements the stack pointer (rcx)
+  // by a word size and stores the value there.
+  inline void Push(Label* label);
+
+  // Pops a value from the backtrack stack. Reads the word at the stack pointer
+  // (rcx) and increments it by a word size.
+  inline void Pop(Register target);
+
+  // Drops the top value from the backtrack stack without reading it.
+  // Increments the stack pointer (rcx) by a word size.
+  inline void Drop();
+
+  // Before calling a C-function from generated code, align arguments on stack.
+  // After aligning the frame, arguments must be stored in esp[0], esp[4],
+  // etc., not pushed. The argument count assumes all arguments are word sized.
+  // Some compilers/platforms require the stack to be aligned when calling
+  // C++ code.
+  // Needs a scratch register to do some arithmetic. This register will be
+  // trashed.
+  inline void FrameAlign(int num_arguments);
+
+  // Calls a C function and cleans up the space for arguments allocated
+  // by FrameAlign. The called function is not allowed to trigger a garbage
+  // collection, since that might move the code and invalidate the return
+  // address (unless this is somehow accounted for by the called function).
+  inline void CallCFunction(Address function_address, int num_arguments);
+
+  MacroAssembler* masm_;
+
+  ZoneList<int> code_relative_fixup_positions_;
+
+  // Which mode to generate code for (ASCII or UC16).
+  Mode mode_;
+
+  // One greater than maximal register index actually used.
+  int num_registers_;
+
+  // Number of registers to output at the end (the saved registers
+  // are always 0..num_saved_registers_-1)
+  int num_saved_registers_;
+
+  // Labels used internally.
+  Label entry_label_;
+  Label start_label_;
+  Label success_label_;
+  Label backtrack_label_;
+  Label exit_label_;
+  Label check_preempt_label_;
+  Label stack_overflow_label_;
+};
+
+}}  // namespace v8::internal
+
+#endif  // V8_X64_REGEXP_MACRO_ASSEMBLER_X64_H_
diff --git a/deps/v8/test/cctest/cctest.status b/deps/v8/test/cctest/cctest.status
index 9abe408948..68aabb5165 100644
--- a/deps/v8/test/cctest/cctest.status
+++ b/deps/v8/test/cctest/cctest.status
@@ -60,61 +60,3 @@ test-log/ProfLazyMode: SKIP
 # the JavaScript stacks are separate.
 test-api/ExceptionOrder: FAIL
 test-api/TryCatchInTryFinally: FAIL
-
-
-[ $arch == x64 ]
-test-decls/Present: CRASH || FAIL
-test-decls/Unknown: CRASH || FAIL
-test-decls/Appearing: CRASH || FAIL
-test-decls/Absent: CRASH || FAIL
-test-debug/DebugStub: CRASH || FAIL
-test-decls/AbsentInPrototype: CRASH || FAIL
-test-decls/Reappearing: CRASH || FAIL
-test-debug/DebugInfo: CRASH || FAIL
-test-decls/ExistsInPrototype: CRASH || FAIL
-test-debug/BreakPointICStore: CRASH || FAIL
-test-debug/BreakPointICLoad: CRASH || FAIL
-test-debug/BreakPointICCall: CRASH || FAIL
-test-debug/BreakPointReturn: CRASH || FAIL
-test-debug/GCDuringBreakPointProcessing: CRASH || FAIL
-test-debug/BreakPointSurviveGC: CRASH || FAIL
-test-debug/BreakPointThroughJavaScript: CRASH || FAIL
-test-debug/ScriptBreakPointByNameThroughJavaScript: CRASH || FAIL
-test-debug/ScriptBreakPointByIdThroughJavaScript: CRASH || FAIL
-test-debug/EnableDisableScriptBreakPoint: CRASH || FAIL
-test-debug/ConditionalScriptBreakPoint: CRASH || FAIL
-test-debug/ScriptBreakPointIgnoreCount: CRASH || FAIL
-test-debug/ScriptBreakPointReload: CRASH || FAIL
-test-debug/ScriptBreakPointMultiple: CRASH || FAIL
-test-debug/RemoveBreakPointInBreak: CRASH || FAIL
-test-debug/DebugEvaluate: CRASH || FAIL
-test-debug/ScriptBreakPointLine: CRASH || FAIL
-test-debug/ScriptBreakPointLineOffset: CRASH || FAIL
-test-debug/DebugStepLinear: CRASH || FAIL
-test-debug/DebugStepKeyedLoadLoop: CRASH || FAIL
-test-debug/DebugStepKeyedStoreLoop: CRASH || FAIL
-test-debug/DebugStepLinearMixedICs: CRASH || FAIL
-test-debug/DebugStepFor: CRASH || FAIL
-test-debug/DebugStepIf: CRASH || FAIL
-test-debug/DebugStepSwitch: CRASH || FAIL
-test-debug/StepInOutSimple: CRASH || FAIL
-test-debug/StepInOutBranch: CRASH || FAIL
-test-debug/StepInOutTree: CRASH || FAIL
-test-debug/DebugStepNatives: CRASH || FAIL
-test-debug/DebugStepFunctionApply: CRASH || FAIL
-test-debug/DebugStepFunctionCall: CRASH || FAIL
-test-debug/StepWithException: CRASH || FAIL
-test-debug/DebugBreak: CRASH || FAIL
-test-debug/DisableBreak: CRASH || FAIL
-test-debug/MessageQueues: CRASH || FAIL
-test-debug/CallFunctionInDebugger: SKIP
-test-debug/RecursiveBreakpoints: CRASH || FAIL
-test-debug/DebuggerUnload: CRASH || FAIL
-test-debug/DebuggerHostDispatch: CRASH || FAIL
-test-debug/DebugBreakInMessageHandler: CRASH || FAIL
-test-debug/NoDebugBreakInAfterCompileMessageHandler: CRASH || FAIL
-test-api/Threading: CRASH || FAIL
-test-api/Threading2: PASS || TIMEOUT
-test-api/TryCatchSourceInfo: CRASH || FAIL
-test-api/RegExpInterruption: PASS || TIMEOUT
-test-api/RegExpStringModification: PASS || TIMEOUT
diff --git a/deps/v8/test/cctest/test-api.cc b/deps/v8/test/cctest/test-api.cc
index 35ac031a55..e1caba3c83 100644
--- a/deps/v8/test/cctest/test-api.cc
+++ b/deps/v8/test/cctest/test-api.cc
@@ -7738,3 +7738,31 @@ THREADED_TEST(PixelArray) {
 
   free(pixel_data);
 }
+
+THREADED_TEST(ScriptContextDependence) {
+  v8::HandleScope scope;
+  LocalContext c1;
+  const char *source = "foo";
+  v8::Handle<v8::Script> dep = v8::Script::Compile(v8::String::New(source));
+  v8::Handle<v8::Script> indep = v8::Script::New(v8::String::New(source));
+  c1->Global()->Set(v8::String::New("foo"), v8::Integer::New(100));
+  CHECK_EQ(dep->Run()->Int32Value(), 100);
+  CHECK_EQ(indep->Run()->Int32Value(), 100);
+  LocalContext c2;
+  c2->Global()->Set(v8::String::New("foo"), v8::Integer::New(101));
+  CHECK_EQ(dep->Run()->Int32Value(), 100);
+  CHECK_EQ(indep->Run()->Int32Value(), 101);
+}
+
+THREADED_TEST(StackTrace) {
+  v8::HandleScope scope;
+  LocalContext context;
+  v8::TryCatch try_catch;
+  const char *source = "function foo() { FAIL.FAIL; }; foo();";
+  v8::Handle<v8::String> src = v8::String::New(source);
+  v8::Handle<v8::String> origin = v8::String::New("stack-trace-test");
+  v8::Script::New(src, origin)->Run();
+  CHECK(try_catch.HasCaught());
+  v8::String::Utf8Value stack(try_catch.StackTrace());
+  CHECK(strstr(*stack, "at foo (stack-trace-test") != NULL);
+}
diff --git a/deps/v8/test/cctest/test-debug.cc b/deps/v8/test/cctest/test-debug.cc
index 9e2c38dbee..f5e4f3a4fc 100644
--- a/deps/v8/test/cctest/test-debug.cc
+++ b/deps/v8/test/cctest/test-debug.cc
@@ -487,9 +487,7 @@ void CheckDebugBreakFunction(DebugLocalContext* env,
     CHECK_EQ(debug_break,
         Code::GetCodeFromTargetAddress(it1.it()->rinfo()->target_address()));
   } else {
-    // TODO(1240753): Make the test architecture independent or split
-    // parts of the debugger into architecture dependent files.
-    CHECK_EQ(0xE8, *(it1.rinfo()->pc()));
+    CHECK(Debug::IsDebugBreakAtReturn(it1.it()->rinfo()));
   }
 
   // Clear the break point and check that the debug break function is no longer
@@ -501,9 +499,7 @@ void CheckDebugBreakFunction(DebugLocalContext* env,
   it2.FindBreakLocationFromPosition(position);
   CHECK_EQ(mode, it2.it()->rinfo()->rmode());
   if (mode == v8::internal::RelocInfo::JS_RETURN) {
-    // TODO(1240753): Make the test architecture independent or split
-    // parts of the debugger into architecture dependent files.
-    CHECK_NE(0xE8, *(it2.rinfo()->pc()));
+    CHECK(!Debug::IsDebugBreakAtReturn(it2.it()->rinfo()));
   }
 }
 
@@ -5357,3 +5353,20 @@ TEST(NoDebugBreakInAfterCompileMessageHandler) {
   v8::Debug::SetMessageHandler2(NULL);
   CheckDebuggerUnloaded();
 }
+
+
+TEST(GetMirror) {
+  v8::HandleScope scope;
+  DebugLocalContext env;
+  v8::Handle<v8::Value> obj = v8::Debug::GetMirror(v8::String::New("hodja"));
+  v8::Handle<v8::Function> run_test = v8::Handle<v8::Function>::Cast(
+      v8::Script::New(
+          v8::String::New(
+              "function runTest(mirror) {"
+              "  return mirror.isString() && (mirror.length() == 5);"
+              "}"
+              ""
+              "runTest;"))->Run());
+  v8::Handle<v8::Value> result = run_test->Call(env->Global(), 1, &obj);
+  CHECK(result->IsTrue());
+}
diff --git a/deps/v8/test/cctest/test-decls.cc b/deps/v8/test/cctest/test-decls.cc
index 6c48f64f72..f083027d0b 100644
--- a/deps/v8/test/cctest/test-decls.cc
+++ b/deps/v8/test/cctest/test-decls.cc
@@ -111,7 +111,7 @@ void DeclarationContext::InitializeIfNeeded() {
   if (is_initialized_) return;
   HandleScope scope;
   Local<FunctionTemplate> function = FunctionTemplate::New();
-  Local<Value> data = Integer::New(reinterpret_cast<intptr_t>(this));
+  Local<Value> data = External::New(this);
   GetHolder(function)->SetNamedPropertyHandler(&HandleGet,
                                                &HandleSet,
                                                &HandleHas,
@@ -179,8 +179,7 @@ v8::Handle<Boolean> DeclarationContext::HandleHas(Local<String> key,
 
 
 DeclarationContext* DeclarationContext::GetInstance(const AccessorInfo& info) {
-  Local<Value> data = info.Data();
-  return reinterpret_cast<DeclarationContext*>(Int32::Cast(*data)->Value());
+  return static_cast<DeclarationContext*>(External::Unwrap(info.Data()));
 }
 
 
diff --git a/deps/v8/test/cctest/test-heap.cc b/deps/v8/test/cctest/test-heap.cc
index 6b5907c2e8..37dbdd7c60 100644
--- a/deps/v8/test/cctest/test-heap.cc
+++ b/deps/v8/test/cctest/test-heap.cc
@@ -44,35 +44,26 @@ TEST(HeapMaps) {
 
 static void CheckOddball(Object* obj, const char* string) {
   CHECK(obj->IsOddball());
-#ifndef V8_HOST_ARCH_64_BIT
-// TODO(X64): Reenable when native builtins work.
   bool exc;
   Object* print_string = *Execution::ToString(Handle<Object>(obj), &exc);
   CHECK(String::cast(print_string)->IsEqualTo(CStrVector(string)));
-#endif  // V8_HOST_ARCH_64_BIT
 }
 
 
 static void CheckSmi(int value, const char* string) {
-#ifndef V8_HOST_ARCH_64_BIT
-// TODO(X64): Reenable when native builtins work.
   bool exc;
   Object* print_string =
       *Execution::ToString(Handle<Object>(Smi::FromInt(value)), &exc);
   CHECK(String::cast(print_string)->IsEqualTo(CStrVector(string)));
-#endif  // V8_HOST_ARCH_64_BIT
 }
 
 
 static void CheckNumber(double value, const char* string) {
   Object* obj = Heap::NumberFromDouble(value);
   CHECK(obj->IsNumber());
-#ifndef V8_HOST_ARCH_64_BIT
-// TODO(X64): Reenable when native builtins work.
   bool exc;
   Object* print_string = *Execution::ToString(Handle<Object>(obj), &exc);
   CHECK(String::cast(print_string)->IsEqualTo(CStrVector(string)));
-#endif  // V8_HOST_ARCH_64_BIT
 }
 
 
@@ -492,8 +483,11 @@ static const char* not_so_random_string_table[] = {
 static void CheckSymbols(const char** strings) {
   for (const char* string = *strings; *strings != 0; string = *strings++) {
     Object* a = Heap::LookupAsciiSymbol(string);
+    // LookupAsciiSymbol may return a failure if a GC is needed.
+    if (a->IsFailure()) continue;
     CHECK(a->IsSymbol());
     Object* b = Heap::LookupAsciiSymbol(string);
+    if (b->IsFailure()) continue;
     CHECK_EQ(b, a);
     CHECK(String::cast(b)->IsEqualTo(CStrVector(string)));
   }
diff --git a/deps/v8/test/cctest/test-regexp.cc b/deps/v8/test/cctest/test-regexp.cc
index 8d8326ccad..89c7868d83 100644
--- a/deps/v8/test/cctest/test-regexp.cc
+++ b/deps/v8/test/cctest/test-regexp.cc
@@ -38,18 +38,21 @@
 #include "jsregexp.h"
 #include "regexp-macro-assembler.h"
 #include "regexp-macro-assembler-irregexp.h"
+#ifdef V8_NATIVE_REGEXP
 #ifdef V8_TARGET_ARCH_ARM
 #include "arm/regexp-macro-assembler-arm.h"
 #endif
 #ifdef V8_TARGET_ARCH_X64
-// No X64-implementation yet.
+#include "x64/macro-assembler-x64.h"
+#include "x64/regexp-macro-assembler-x64.h"
 #endif
 #ifdef V8_TARGET_ARCH_IA32
 #include "ia32/macro-assembler-ia32.h"
 #include "ia32/regexp-macro-assembler-ia32.h"
 #endif
+#else
 #include "interpreter-irregexp.h"
-
+#endif
 
 using namespace v8::internal;
 
@@ -599,75 +602,20 @@ TEST(DispatchTableConstruction) {
 
 // Tests of interpreter.
 
-TEST(MacroAssembler) {
-  V8::Initialize(NULL);
-  byte codes[1024];
-  RegExpMacroAssemblerIrregexp m(Vector<byte>(codes, 1024));
-  // ^f(o)o.
-  Label fail, fail2, start;
-  uc16 foo_chars[3];
-  foo_chars[0] = 'f';
-  foo_chars[1] = 'o';
-  foo_chars[2] = 'o';
-  Vector<const uc16> foo(foo_chars, 3);
-  m.SetRegister(4, 42);
-  m.PushRegister(4, RegExpMacroAssembler::kNoStackLimitCheck);
-  m.AdvanceRegister(4, 42);
-  m.GoTo(&start);
-  m.Fail();
-  m.Bind(&start);
-  m.PushBacktrack(&fail2);
-  m.CheckCharacters(foo, 0, &fail, true);
-  m.WriteCurrentPositionToRegister(0, 0);
-  m.PushCurrentPosition();
-  m.AdvanceCurrentPosition(3);
-  m.WriteCurrentPositionToRegister(1, 0);
-  m.PopCurrentPosition();
-  m.AdvanceCurrentPosition(1);
-  m.WriteCurrentPositionToRegister(2, 0);
-  m.AdvanceCurrentPosition(1);
-  m.WriteCurrentPositionToRegister(3, 0);
-  m.Succeed();
-
-  m.Bind(&fail);
-  m.Backtrack();
-  m.Succeed();
 
-  m.Bind(&fail2);
-  m.PopRegister(0);
-  m.Fail();
-
-  v8::HandleScope scope;
-
-  Handle<String> source = Factory::NewStringFromAscii(CStrVector("^f(o)o"));
-  Handle<ByteArray> array = Handle<ByteArray>::cast(m.GetCode(source));
-  int captures[5];
-
-  const uc16 str1[] = {'f', 'o', 'o', 'b', 'a', 'r'};
-  Handle<String> f1_16 =
-      Factory::NewStringFromTwoByte(Vector<const uc16>(str1, 6));
-
-  CHECK(IrregexpInterpreter::Match(array, f1_16, captures, 0));
-  CHECK_EQ(0, captures[0]);
-  CHECK_EQ(3, captures[1]);
-  CHECK_EQ(1, captures[2]);
-  CHECK_EQ(2, captures[3]);
-  CHECK_EQ(84, captures[4]);
-
-  const uc16 str2[] = {'b', 'a', 'r', 'f', 'o', 'o'};
-  Handle<String> f2_16 =
-      Factory::NewStringFromTwoByte(Vector<const uc16>(str2, 6));
-
-  CHECK(!IrregexpInterpreter::Match(array, f2_16, captures, 0));
-  CHECK_EQ(42, captures[0]);
-}
-
-#ifdef V8_TARGET_ARCH_IA32  // IA32 Native Regexp only tests.
 #ifdef V8_NATIVE_REGEXP
 
+#ifdef V8_TARGET_ARCH_IA32
+typedef RegExpMacroAssemblerIA32 ArchRegExpMacroAssembler;
+#endif
+#ifdef V8_TARGET_ARCH_X64
+typedef RegExpMacroAssemblerX64 ArchRegExpMacroAssembler;
+#endif
+
 class ContextInitializer {
  public:
-  ContextInitializer() : env_(), scope_(), stack_guard_() {
+  ContextInitializer()
+      : env_(), scope_(), zone_(DELETE_ON_EXIT), stack_guard_() {
     env_ = v8::Context::New();
     env_->Enter();
   }
@@ -678,18 +626,19 @@ class ContextInitializer {
  private:
   v8::Persistent<v8::Context> env_;
   v8::HandleScope scope_;
+  v8::internal::ZoneScope zone_;
   v8::internal::StackGuard stack_guard_;
 };
 
 
-static RegExpMacroAssemblerIA32::Result ExecuteIA32(Code* code,
-                                                    String* input,
-                                                    int start_offset,
-                                                    const byte* input_start,
-                                                    const byte* input_end,
-                                                    int* captures,
-                                                    bool at_start) {
-  return RegExpMacroAssemblerIA32::Execute(
+static ArchRegExpMacroAssembler::Result Execute(Code* code,
+                                                String* input,
+                                                int start_offset,
+                                                const byte* input_start,
+                                                const byte* input_end,
+                                                int* captures,
+                                                bool at_start) {
+  return NativeRegExpMacroAssembler::Execute(
       code,
       input,
       start_offset,
@@ -700,11 +649,11 @@ static RegExpMacroAssemblerIA32::Result ExecuteIA32(Code* code,
 }
 
 
-TEST(MacroAssemblerIA32Success) {
+TEST(MacroAssemblerNativeSuccess) {
   v8::V8::Initialize();
   ContextInitializer initializer;
 
-  RegExpMacroAssemblerIA32 m(RegExpMacroAssemblerIA32::ASCII, 4);
+  ArchRegExpMacroAssembler m(NativeRegExpMacroAssembler::ASCII, 4);
 
   m.Succeed();
 
@@ -718,16 +667,16 @@ TEST(MacroAssemblerIA32Success) {
   const byte* start_adr =
       reinterpret_cast<const byte*>(seq_input->GetCharsAddress());
 
-  RegExpMacroAssemblerIA32::Result result =
-      ExecuteIA32(*code,
-                  *input,
-                  0,
-                  start_adr,
-                  start_adr + seq_input->length(),
-                  captures,
-                  true);
+  NativeRegExpMacroAssembler::Result result =
+      Execute(*code,
+              *input,
+              0,
+              start_adr,
+              start_adr + seq_input->length(),
+              captures,
+              true);
 
-  CHECK_EQ(RegExpMacroAssemblerIA32::SUCCESS, result);
+  CHECK_EQ(NativeRegExpMacroAssembler::SUCCESS, result);
   CHECK_EQ(-1, captures[0]);
   CHECK_EQ(-1, captures[1]);
   CHECK_EQ(-1, captures[2]);
@@ -735,11 +684,11 @@ TEST(MacroAssemblerIA32Success) {
 }
 
 
-TEST(MacroAssemblerIA32Simple) {
+TEST(MacroAssemblerNativeSimple) {
   v8::V8::Initialize();
   ContextInitializer initializer;
 
-  RegExpMacroAssemblerIA32 m(RegExpMacroAssemblerIA32::ASCII, 4);
+  ArchRegExpMacroAssembler m(NativeRegExpMacroAssembler::ASCII, 4);
 
   uc16 foo_chars[3] = {'f', 'o', 'o'};
   Vector<const uc16> foo(foo_chars, 3);
@@ -762,16 +711,16 @@ TEST(MacroAssemblerIA32Simple) {
   Handle<SeqAsciiString> seq_input = Handle<SeqAsciiString>::cast(input);
   Address start_adr = seq_input->GetCharsAddress();
 
-  RegExpMacroAssemblerIA32::Result result =
-      ExecuteIA32(*code,
-                  *input,
-                  0,
-                  start_adr,
-                  start_adr + input->length(),
-                  captures,
-                  true);
+  NativeRegExpMacroAssembler::Result result =
+      Execute(*code,
+              *input,
+              0,
+              start_adr,
+              start_adr + input->length(),
+              captures,
+              true);
 
-  CHECK_EQ(RegExpMacroAssemblerIA32::SUCCESS, result);
+  CHECK_EQ(NativeRegExpMacroAssembler::SUCCESS, result);
   CHECK_EQ(0, captures[0]);
   CHECK_EQ(3, captures[1]);
   CHECK_EQ(-1, captures[2]);
@@ -781,23 +730,23 @@ TEST(MacroAssemblerIA32Simple) {
   seq_input = Handle<SeqAsciiString>::cast(input);
   start_adr = seq_input->GetCharsAddress();
 
-  result = ExecuteIA32(*code,
-                       *input,
-                       0,
-                       start_adr,
-                       start_adr + input->length(),
-                       captures,
-                       true);
+  result = Execute(*code,
+                   *input,
+                   0,
+                   start_adr,
+                   start_adr + input->length(),
+                   captures,
+                   true);
 
-  CHECK_EQ(RegExpMacroAssemblerIA32::FAILURE, result);
+  CHECK_EQ(NativeRegExpMacroAssembler::FAILURE, result);
 }
 
 
-TEST(MacroAssemblerIA32SimpleUC16) {
+TEST(MacroAssemblerNativeSimpleUC16) {
   v8::V8::Initialize();
   ContextInitializer initializer;
 
-  RegExpMacroAssemblerIA32 m(RegExpMacroAssemblerIA32::UC16, 4);
+  ArchRegExpMacroAssembler m(NativeRegExpMacroAssembler::UC16, 4);
 
   uc16 foo_chars[3] = {'f', 'o', 'o'};
   Vector<const uc16> foo(foo_chars, 3);
@@ -822,16 +771,16 @@ TEST(MacroAssemblerIA32SimpleUC16) {
   Handle<SeqTwoByteString> seq_input = Handle<SeqTwoByteString>::cast(input);
   Address start_adr = seq_input->GetCharsAddress();
 
-  RegExpMacroAssemblerIA32::Result result =
-      ExecuteIA32(*code,
-                  *input,
-                  0,
-                  start_adr,
-                  start_adr + input->length(),
-                  captures,
-                  true);
+  NativeRegExpMacroAssembler::Result result =
+      Execute(*code,
+              *input,
+              0,
+              start_adr,
+              start_adr + input->length(),
+              captures,
+              true);
 
-  CHECK_EQ(RegExpMacroAssemblerIA32::SUCCESS, result);
+  CHECK_EQ(NativeRegExpMacroAssembler::SUCCESS, result);
   CHECK_EQ(0, captures[0]);
   CHECK_EQ(3, captures[1]);
   CHECK_EQ(-1, captures[2]);
@@ -842,23 +791,23 @@ TEST(MacroAssemblerIA32SimpleUC16) {
   seq_input = Handle<SeqTwoByteString>::cast(input);
   start_adr = seq_input->GetCharsAddress();
 
-  result = ExecuteIA32(*code,
-                       *input,
-                       0,
-                       start_adr,
-                       start_adr + input->length() * 2,
-                       captures,
-                       true);
+  result = Execute(*code,
+                   *input,
+                   0,
+                   start_adr,
+                   start_adr + input->length() * 2,
+                   captures,
+                   true);
 
-  CHECK_EQ(RegExpMacroAssemblerIA32::FAILURE, result);
+  CHECK_EQ(NativeRegExpMacroAssembler::FAILURE, result);
 }
 
 
-TEST(MacroAssemblerIA32Backtrack) {
+TEST(MacroAssemblerNativeBacktrack) {
   v8::V8::Initialize();
   ContextInitializer initializer;
 
-  RegExpMacroAssemblerIA32 m(RegExpMacroAssemblerIA32::ASCII, 0);
+  ArchRegExpMacroAssembler m(NativeRegExpMacroAssembler::ASCII, 0);
 
   Label fail;
   Label backtrack;
@@ -879,24 +828,24 @@ TEST(MacroAssemblerIA32Backtrack) {
   Handle<SeqAsciiString> seq_input = Handle<SeqAsciiString>::cast(input);
   Address start_adr = seq_input->GetCharsAddress();
 
-  RegExpMacroAssemblerIA32::Result result =
-      ExecuteIA32(*code,
-                  *input,
-                  0,
-                  start_adr,
-                  start_adr + input->length(),
-                  NULL,
-                  true);
+  NativeRegExpMacroAssembler::Result result =
+      Execute(*code,
+              *input,
+              0,
+              start_adr,
+              start_adr + input->length(),
+              NULL,
+              true);
 
-  CHECK_EQ(RegExpMacroAssemblerIA32::FAILURE, result);
+  CHECK_EQ(NativeRegExpMacroAssembler::FAILURE, result);
 }
 
 
-TEST(MacroAssemblerIA32BackReferenceASCII) {
+TEST(MacroAssemblerNativeBackReferenceASCII) {
   v8::V8::Initialize();
   ContextInitializer initializer;
 
-  RegExpMacroAssemblerIA32 m(RegExpMacroAssemblerIA32::ASCII, 3);
+  ArchRegExpMacroAssembler m(NativeRegExpMacroAssembler::ASCII, 3);
 
   m.WriteCurrentPositionToRegister(0, 0);
   m.AdvanceCurrentPosition(2);
@@ -922,27 +871,27 @@ TEST(MacroAssemblerIA32BackReferenceASCII) {
   Address start_adr = seq_input->GetCharsAddress();
 
   int output[3];
-  RegExpMacroAssemblerIA32::Result result =
-      ExecuteIA32(*code,
-                  *input,
-                  0,
-                  start_adr,
-                  start_adr + input->length(),
-                  output,
-                  true);
-
-  CHECK_EQ(RegExpMacroAssemblerIA32::SUCCESS, result);
+  NativeRegExpMacroAssembler::Result result =
+      Execute(*code,
+              *input,
+              0,
+              start_adr,
+              start_adr + input->length(),
+              output,
+              true);
+
+  CHECK_EQ(NativeRegExpMacroAssembler::SUCCESS, result);
   CHECK_EQ(0, output[0]);
   CHECK_EQ(2, output[1]);
   CHECK_EQ(6, output[2]);
 }
 
 
-TEST(MacroAssemblerIA32BackReferenceUC16) {
+TEST(MacroAssemblerNativeBackReferenceUC16) {
   v8::V8::Initialize();
   ContextInitializer initializer;
 
-  RegExpMacroAssemblerIA32 m(RegExpMacroAssemblerIA32::UC16, 3);
+  ArchRegExpMacroAssembler m(NativeRegExpMacroAssembler::UC16, 3);
 
   m.WriteCurrentPositionToRegister(0, 0);
   m.AdvanceCurrentPosition(2);
@@ -970,8 +919,8 @@ TEST(MacroAssemblerIA32BackReferenceUC16) {
   Address start_adr = seq_input->GetCharsAddress();
 
   int output[3];
-  RegExpMacroAssemblerIA32::Result result =
-      ExecuteIA32(*code,
+  NativeRegExpMacroAssembler::Result result =
+      Execute(*code,
                   *input,
                   0,
                   start_adr,
@@ -979,7 +928,7 @@ TEST(MacroAssemblerIA32BackReferenceUC16) {
                   output,
                   true);
 
-  CHECK_EQ(RegExpMacroAssemblerIA32::SUCCESS, result);
+  CHECK_EQ(NativeRegExpMacroAssembler::SUCCESS, result);
   CHECK_EQ(0, output[0]);
   CHECK_EQ(2, output[1]);
   CHECK_EQ(6, output[2]);
@@ -987,11 +936,11 @@ TEST(MacroAssemblerIA32BackReferenceUC16) {
 
 
 
-TEST(MacroAssemblerIA32AtStart) {
+TEST(MacroAssemblernativeAtStart) {
   v8::V8::Initialize();
   ContextInitializer initializer;
 
-  RegExpMacroAssemblerIA32 m(RegExpMacroAssemblerIA32::ASCII, 0);
+  ArchRegExpMacroAssembler m(NativeRegExpMacroAssembler::ASCII, 0);
 
   Label not_at_start, newline, fail;
   m.CheckNotAtStart(&not_at_start);
@@ -1022,34 +971,34 @@ TEST(MacroAssemblerIA32AtStart) {
   Handle<SeqAsciiString> seq_input = Handle<SeqAsciiString>::cast(input);
   Address start_adr = seq_input->GetCharsAddress();
 
-  RegExpMacroAssemblerIA32::Result result =
-      ExecuteIA32(*code,
-                  *input,
-                  0,
-                  start_adr,
-                  start_adr + input->length(),
-                  NULL,
-                  true);
-
-  CHECK_EQ(RegExpMacroAssemblerIA32::SUCCESS, result);
-
-  result = ExecuteIA32(*code,
-                       *input,
-                       3,
-                       start_adr + 3,
-                       start_adr + input->length(),
-                       NULL,
-                       false);
-
-  CHECK_EQ(RegExpMacroAssemblerIA32::SUCCESS, result);
+  NativeRegExpMacroAssembler::Result result =
+      Execute(*code,
+              *input,
+              0,
+              start_adr,
+              start_adr + input->length(),
+              NULL,
+              true);
+
+  CHECK_EQ(NativeRegExpMacroAssembler::SUCCESS, result);
+
+  result = Execute(*code,
+                   *input,
+                   3,
+                   start_adr + 3,
+                   start_adr + input->length(),
+                   NULL,
+                   false);
+
+  CHECK_EQ(NativeRegExpMacroAssembler::SUCCESS, result);
 }
 
 
-TEST(MacroAssemblerIA32BackRefNoCase) {
+TEST(MacroAssemblerNativeBackRefNoCase) {
   v8::V8::Initialize();
   ContextInitializer initializer;
 
-  RegExpMacroAssemblerIA32 m(RegExpMacroAssemblerIA32::ASCII, 4);
+  ArchRegExpMacroAssembler m(NativeRegExpMacroAssembler::ASCII, 4);
 
   Label fail, succ;
 
@@ -1084,16 +1033,16 @@ TEST(MacroAssemblerIA32BackRefNoCase) {
   Address start_adr = seq_input->GetCharsAddress();
 
   int output[4];
-  RegExpMacroAssemblerIA32::Result result =
-      ExecuteIA32(*code,
-                  *input,
-                  0,
-                  start_adr,
-                  start_adr + input->length(),
-                  output,
-                  true);
-
-  CHECK_EQ(RegExpMacroAssemblerIA32::SUCCESS, result);
+  NativeRegExpMacroAssembler::Result result =
+      Execute(*code,
+              *input,
+              0,
+              start_adr,
+              start_adr + input->length(),
+              output,
+              true);
+
+  CHECK_EQ(NativeRegExpMacroAssembler::SUCCESS, result);
   CHECK_EQ(0, output[0]);
   CHECK_EQ(12, output[1]);
   CHECK_EQ(0, output[2]);
@@ -1102,11 +1051,11 @@ TEST(MacroAssemblerIA32BackRefNoCase) {
 
 
 
-TEST(MacroAssemblerIA32Registers) {
+TEST(MacroAssemblerNativeRegisters) {
   v8::V8::Initialize();
   ContextInitializer initializer;
 
-  RegExpMacroAssemblerIA32 m(RegExpMacroAssemblerIA32::ASCII, 5);
+  ArchRegExpMacroAssembler m(NativeRegExpMacroAssembler::ASCII, 5);
 
   uc16 foo_chars[3] = {'f', 'o', 'o'};
   Vector<const uc16> foo(foo_chars, 3);
@@ -1184,8 +1133,8 @@ TEST(MacroAssemblerIA32Registers) {
   Address start_adr = seq_input->GetCharsAddress();
 
   int output[5];
-  RegExpMacroAssemblerIA32::Result result =
-      ExecuteIA32(*code,
+  NativeRegExpMacroAssembler::Result result =
+      Execute(*code,
                   *input,
                   0,
                   start_adr,
@@ -1193,7 +1142,7 @@ TEST(MacroAssemblerIA32Registers) {
                   output,
                   true);
 
-  CHECK_EQ(RegExpMacroAssemblerIA32::SUCCESS, result);
+  CHECK_EQ(NativeRegExpMacroAssembler::SUCCESS, result);
   CHECK_EQ(0, output[0]);
   CHECK_EQ(3, output[1]);
   CHECK_EQ(6, output[2]);
@@ -1202,11 +1151,11 @@ TEST(MacroAssemblerIA32Registers) {
 }
 
 
-TEST(MacroAssemblerIA32StackOverflow) {
+TEST(MacroAssemblerStackOverflow) {
   v8::V8::Initialize();
   ContextInitializer initializer;
 
-  RegExpMacroAssemblerIA32 m(RegExpMacroAssemblerIA32::ASCII, 0);
+  ArchRegExpMacroAssembler m(NativeRegExpMacroAssembler::ASCII, 0);
 
   Label loop;
   m.Bind(&loop);
@@ -1224,26 +1173,26 @@ TEST(MacroAssemblerIA32StackOverflow) {
   Handle<SeqAsciiString> seq_input = Handle<SeqAsciiString>::cast(input);
   Address start_adr = seq_input->GetCharsAddress();
 
-  RegExpMacroAssemblerIA32::Result result =
-      ExecuteIA32(*code,
-                  *input,
-                  0,
-                  start_adr,
-                  start_adr + input->length(),
-                  NULL,
-                  true);
+  NativeRegExpMacroAssembler::Result result =
+      Execute(*code,
+              *input,
+              0,
+              start_adr,
+              start_adr + input->length(),
+              NULL,
+              true);
 
-  CHECK_EQ(RegExpMacroAssemblerIA32::EXCEPTION, result);
+  CHECK_EQ(NativeRegExpMacroAssembler::EXCEPTION, result);
   CHECK(Top::has_pending_exception());
   Top::clear_pending_exception();
 }
 
 
-TEST(MacroAssemblerIA32LotsOfRegisters) {
+TEST(MacroAssemblerNativeLotsOfRegisters) {
   v8::V8::Initialize();
   ContextInitializer initializer;
 
-  RegExpMacroAssemblerIA32 m(RegExpMacroAssemblerIA32::ASCII, 2);
+  ArchRegExpMacroAssembler m(NativeRegExpMacroAssembler::ASCII, 2);
 
   // At least 2048, to ensure the allocated space for registers
   // span one full page.
@@ -1270,24 +1219,88 @@ TEST(MacroAssemblerIA32LotsOfRegisters) {
   Address start_adr = seq_input->GetCharsAddress();
 
   int captures[2];
-  RegExpMacroAssemblerIA32::Result result =
-      ExecuteIA32(*code,
-                  *input,
-                  0,
-                  start_adr,
-                  start_adr + input->length(),
-                  captures,
-                  true);
-
-  CHECK_EQ(RegExpMacroAssemblerIA32::SUCCESS, result);
+  NativeRegExpMacroAssembler::Result result =
+      Execute(*code,
+              *input,
+              0,
+              start_adr,
+              start_adr + input->length(),
+              captures,
+              true);
+
+  CHECK_EQ(NativeRegExpMacroAssembler::SUCCESS, result);
   CHECK_EQ(0, captures[0]);
   CHECK_EQ(42, captures[1]);
 
   Top::clear_pending_exception();
 }
 
-#endif  // V8_REGEXP_NATIVE
-#endif  // V8_TARGET_ARCH_IA32
+#else  // ! V8_REGEX_NATIVE
+
+TEST(MacroAssembler) {
+  V8::Initialize(NULL);
+  byte codes[1024];
+  RegExpMacroAssemblerIrregexp m(Vector<byte>(codes, 1024));
+  // ^f(o)o.
+  Label fail, fail2, start;
+  uc16 foo_chars[3];
+  foo_chars[0] = 'f';
+  foo_chars[1] = 'o';
+  foo_chars[2] = 'o';
+  Vector<const uc16> foo(foo_chars, 3);
+  m.SetRegister(4, 42);
+  m.PushRegister(4, RegExpMacroAssembler::kNoStackLimitCheck);
+  m.AdvanceRegister(4, 42);
+  m.GoTo(&start);
+  m.Fail();
+  m.Bind(&start);
+  m.PushBacktrack(&fail2);
+  m.CheckCharacters(foo, 0, &fail, true);
+  m.WriteCurrentPositionToRegister(0, 0);
+  m.PushCurrentPosition();
+  m.AdvanceCurrentPosition(3);
+  m.WriteCurrentPositionToRegister(1, 0);
+  m.PopCurrentPosition();
+  m.AdvanceCurrentPosition(1);
+  m.WriteCurrentPositionToRegister(2, 0);
+  m.AdvanceCurrentPosition(1);
+  m.WriteCurrentPositionToRegister(3, 0);
+  m.Succeed();
+
+  m.Bind(&fail);
+  m.Backtrack();
+  m.Succeed();
+
+  m.Bind(&fail2);
+  m.PopRegister(0);
+  m.Fail();
+
+  v8::HandleScope scope;
+
+  Handle<String> source = Factory::NewStringFromAscii(CStrVector("^f(o)o"));
+  Handle<ByteArray> array = Handle<ByteArray>::cast(m.GetCode(source));
+  int captures[5];
+
+  const uc16 str1[] = {'f', 'o', 'o', 'b', 'a', 'r'};
+  Handle<String> f1_16 =
+      Factory::NewStringFromTwoByte(Vector<const uc16>(str1, 6));
+
+  CHECK(IrregexpInterpreter::Match(array, f1_16, captures, 0));
+  CHECK_EQ(0, captures[0]);
+  CHECK_EQ(3, captures[1]);
+  CHECK_EQ(1, captures[2]);
+  CHECK_EQ(2, captures[3]);
+  CHECK_EQ(84, captures[4]);
+
+  const uc16 str2[] = {'b', 'a', 'r', 'f', 'o', 'o'};
+  Handle<String> f2_16 =
+      Factory::NewStringFromTwoByte(Vector<const uc16>(str2, 6));
+
+  CHECK(!IrregexpInterpreter::Match(array, f2_16, captures, 0));
+  CHECK_EQ(42, captures[0]);
+}
+
+#endif  // ! V8_REGEXP_NATIVE
 
 
 TEST(AddInverseToTable) {
diff --git a/deps/v8/test/message/message.status b/deps/v8/test/message/message.status
index 9afaa0f148..fc2896b1c9 100644
--- a/deps/v8/test/message/message.status
+++ b/deps/v8/test/message/message.status
@@ -29,16 +29,3 @@ prefix message
 
 # All tests in the bug directory are expected to fail.
 bugs: FAIL
-
-[ $arch == x64 ]
-
-simple-throw: FAIL
-try-catch-finally-throw-in-catch-and-finally: FAIL
-try-catch-finally-throw-in-catch: FAIL
-try-catch-finally-throw-in-finally: FAIL
-try-finally-throw-in-finally: FAIL
-try-finally-throw-in-try-and-finally: FAIL
-try-finally-throw-in-try: FAIL
-overwritten-builtins: FAIL
-regress/regress-73: FAIL
-regress/regress-75: FAIL
diff --git a/deps/v8/test/mjsunit/div-mod.js b/deps/v8/test/mjsunit/div-mod.js
index 39fab27829..a8a19b30c1 100644
--- a/deps/v8/test/mjsunit/div-mod.js
+++ b/deps/v8/test/mjsunit/div-mod.js
@@ -48,7 +48,7 @@ function run_tests_for(divisor) {
   divmod(div_func, mod_func, 0, divisor);
   divmod(div_func, mod_func, 1 / 0, divisor);
   // Floating point number test.
-  for (exp = -1024; exp <= 1024; exp += 4) {
+  for (exp = -1024; exp <= 1024; exp += 8) {
     divmod(div_func, mod_func, Math.pow(2, exp), divisor);
     divmod(div_func, mod_func, 0.9999999 * Math.pow(2, exp), divisor);
     divmod(div_func, mod_func, 1.0000001 * Math.pow(2, exp), divisor);
@@ -76,13 +76,7 @@ var divisors = [
   8,
   9,
   10,
-  // These ones in the middle don't add much apart from slowness to the test.
   0x1000000,
-  0x2000000,
-  0x4000000,
-  0x8000000,
-  0x10000000,
-  0x20000000,
   0x40000000,
   12,
   60,
@@ -92,4 +86,3 @@ var divisors = [
 for (var i = 0; i < divisors.length; i++) {
   run_tests_for(divisors[i]);
 }
-
diff --git a/deps/v8/test/mjsunit/mjsunit.js b/deps/v8/test/mjsunit/mjsunit.js
index 2c52a31e60..1fb3f02afb 100644
--- a/deps/v8/test/mjsunit/mjsunit.js
+++ b/deps/v8/test/mjsunit/mjsunit.js
@@ -179,9 +179,13 @@ function assertInstanceof(obj, type) {
 
 function assertDoesNotThrow(code) {
   try {
-    eval(code);
+    if (typeof code == 'function') {
+      code();
+    } else {
+      eval(code);
+    }
   } catch (e) {
-    assertTrue(false, "threw an exception");
+    assertTrue(false, "threw an exception: " + (e.message || e));
   }
 }
 
diff --git a/deps/v8/test/mjsunit/mjsunit.status b/deps/v8/test/mjsunit/mjsunit.status
index 6853cdc65a..4bf67e80d6 100644
--- a/deps/v8/test/mjsunit/mjsunit.status
+++ b/deps/v8/test/mjsunit/mjsunit.status
@@ -73,33 +73,3 @@ string-compare-alignment: PASS || FAIL
 
 # Times out often in release mode on ARM.
 array-splice: PASS || TIMEOUT
-
-[ $arch == x64 ]
-
-debug-backtrace: CRASH || FAIL
-debug-backtrace-text: CRASH || FAIL
-debug-multiple-breakpoints: CRASH || FAIL
-debug-breakpoints: CRASH || FAIL
-debug-changebreakpoint: CRASH || FAIL
-debug-clearbreakpoint: CRASH || FAIL
-debug-conditional-breakpoints: CRASH || FAIL
-debug-constructor: CRASH || FAIL
-debug-continue: CRASH || FAIL
-debug-enable-disable-breakpoints: CRASH || FAIL
-debug-evaluate-recursive: CRASH || FAIL
-debug-event-listener: CRASH || FAIL
-debug-evaluate: CRASH || FAIL
-debug-ignore-breakpoints: CRASH || FAIL
-debug-setbreakpoint: CRASH || FAIL
-debug-step-stub-callfunction: CRASH || FAIL
-debug-step: CRASH || FAIL
-debug-stepin-builtin: CRASH || FAIL
-debug-stepin-constructor: CRASH || FAIL
-debug-stepin-function-call: CRASH || FAIL
-debug-stepin-accessor: CRASH || FAIL
-fuzz-natives: PASS || TIMEOUT
-debug-handle: CRASH || FAIL
-debug-clearbreakpointgroup: CRASH || FAIL
-regress/regress-269: CRASH || FAIL
-regress/regress-998565: CRASH || FAIL
-tools/tickprocessor: PASS || CRASH || FAIL
diff --git a/deps/v8/test/mjsunit/simple-constructor.js b/deps/v8/test/mjsunit/simple-constructor.js
new file mode 100755
index 0000000000..b26d6519b0
--- /dev/null
+++ b/deps/v8/test/mjsunit/simple-constructor.js
@@ -0,0 +1,78 @@
+// 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.
+
+function props(x) {
+  var array = [];
+  for (var p in x) array.push(p);
+  return array.sort();
+}
+
+function f1() {
+  this.x = 1;
+}
+
+function f2(x) {
+  this.x = x;
+}
+
+function f3(x) {
+  this.x = x;
+  this.y = 1;
+  this.z = f1;
+}
+
+function f4(x) {
+  this.x = x;
+  this.y = 1;
+  if (x == 1) return;
+  this.z = f1;
+}
+
+o1_1 = new f1();
+o1_2 = new f1();
+assertArrayEquals(["x"], props(o1_1));
+assertArrayEquals(["x"], props(o1_2));
+
+o2_1 = new f2(0);
+o2_2 = new f2(0);
+assertArrayEquals(["x"], props(o2_1));
+assertArrayEquals(["x"], props(o2_2));
+
+o3_1 = new f3(0);
+o3_2 = new f3(0);
+assertArrayEquals(["x", "y", "z"], props(o3_1));
+assertArrayEquals(["x", "y", "z"], props(o3_2));
+
+o4_0_1 = new f4(0);
+o4_0_2 = new f4(0);
+assertArrayEquals(["x", "y", "z"], props(o4_0_1));
+assertArrayEquals(["x", "y", "z"], props(o4_0_2));
+
+o4_1_1 = new f4(1);
+o4_1_2 = new f4(1);
+assertArrayEquals(["x", "y"], props(o4_1_1));
+assertArrayEquals(["x", "y"], props(o4_1_2));
diff --git a/deps/v8/test/mjsunit/stack-traces.js b/deps/v8/test/mjsunit/stack-traces.js
index 3bb5755aed..d7ece2c6f2 100644
--- a/deps/v8/test/mjsunit/stack-traces.js
+++ b/deps/v8/test/mjsunit/stack-traces.js
@@ -103,22 +103,24 @@ function testStrippedCustomError() {
 
 // Utility function for testing that the expected strings occur
 // in the stack trace produced when running the given function.
-function testTrace(fun, expected, unexpected) {
+function testTrace(name, fun, expected, unexpected) {
   var threw = false;
   try {
     fun();
   } catch (e) {
     for (var i = 0; i < expected.length; i++) {
-      assertTrue(e.stack.indexOf(expected[i]) != -1);
+      assertTrue(e.stack.indexOf(expected[i]) != -1,
+                 name + " doesn't contain expected[" + i + "]");
     }
     if (unexpected) {
       for (var i = 0; i < unexpected.length; i++) {
-        assertEquals(e.stack.indexOf(unexpected[i]), -1);
+        assertEquals(e.stack.indexOf(unexpected[i]), -1,
+                     name + " contains unexpected[" + i + "]");
       }
     }
     threw = true;
   }
-  assertTrue(threw);
+  assertTrue(threw, name + " didn't throw");
 }
 
 // Test that the error constructor is not shown in the trace
@@ -127,10 +129,11 @@ function testCallerCensorship() {
   try {
     FAIL;
   } catch (e) {
-    assertEquals(-1, e.stack.indexOf('at new ReferenceError'));
+    assertEquals(-1, e.stack.indexOf('at new ReferenceError'),
+                 "CallerCensorship contained new ReferenceError");
     threw = true;
   }
-  assertTrue(threw);
+  assertTrue(threw, "CallerCensorship didn't throw");
 }
 
 // Test that the explicit constructor call is shown in the trace
@@ -143,10 +146,11 @@ function testUnintendedCallerCensorship() {
       }
     });
   } catch (e) {
-    assertTrue(e.stack.indexOf('at new ReferenceError') != -1);
+    assertTrue(e.stack.indexOf('at new ReferenceError') != -1,
+               "UnintendedCallerCensorship didn't contain new ReferenceError");
     threw = true;
   }
-  assertTrue(threw);
+  assertTrue(threw, "UnintendedCallerCensorship didn't throw");
 }
 
 // If an error occurs while the stack trace is being formatted it should
@@ -161,9 +165,10 @@ function testErrorsDuringFormatting() {
     n.foo();
   } catch (e) {
     threw = true;
-    assertTrue(e.stack.indexOf('<error: ReferenceError') != -1);
+    assertTrue(e.stack.indexOf('<error: ReferenceError') != -1,
+               "ErrorsDuringFormatting didn't contain error: ReferenceError");
   }
-  assertTrue(threw);
+  assertTrue(threw, "ErrorsDuringFormatting didn't throw");
   threw = false;
   // Now we can't even format the message saying that we couldn't format
   // the stack frame.  Put that in your pipe and smoke it!
@@ -172,26 +177,28 @@ function testErrorsDuringFormatting() {
     n.foo();
   } catch (e) {
     threw = true;
-    assertTrue(e.stack.indexOf('<error>') != -1);
+    assertTrue(e.stack.indexOf('<error>') != -1,
+               "ErrorsDuringFormatting didn't contain <error>");
   }
-  assertTrue(threw);
-}
-
-testTrace(testArrayNative, ["Array.map (native)"]);
-testTrace(testNested, ["at one", "at two", "at three"]);
-testTrace(testMethodNameInference, ["at Foo.bar"]);
-testTrace(testImplicitConversion, ["at Nirk.valueOf"]);
-testTrace(testEval, ["at Doo (eval at testEval"]);
-testTrace(testNestedEval, ["eval at Inner (eval at Outer"]);
-testTrace(testValue, ["at Number.causeError"]);
-testTrace(testConstructor, ["new Plonk"]);
-testTrace(testRenamedMethod, ["Wookie.a$b$c$d [as d]"]);
-testTrace(testAnonymousMethod, ["Array.<anonymous>"]);
-testTrace(testDefaultCustomError, ["hep-hey", "new CustomError"],
+  assertTrue(threw, "ErrorsDuringFormatting didnt' throw (2)");
+}
+
+
+testTrace("testArrayNative", testArrayNative, ["Array.map (native)"]);
+testTrace("testNested", testNested, ["at one", "at two", "at three"]);
+testTrace("testMethodNameInference", testMethodNameInference, ["at Foo.bar"]);
+testTrace("testImplicitConversion", testImplicitConversion, ["at Nirk.valueOf"]);
+testTrace("testEval", testEval, ["at Doo (eval at testEval"]);
+testTrace("testNestedEval", testNestedEval, ["eval at Inner (eval at Outer"]);
+testTrace("testValue", testValue, ["at Number.causeError"]);
+testTrace("testConstructor", testConstructor, ["new Plonk"]);
+testTrace("testRenamedMethod", testRenamedMethod, ["Wookie.a$b$c$d [as d]"]);
+testTrace("testAnonymousMethod", testAnonymousMethod, ["Array.<anonymous>"]);
+testTrace("testDefaultCustomError", testDefaultCustomError,
+    ["hep-hey", "new CustomError"],
     ["collectStackTrace"]);
-testTrace(testStrippedCustomError, ["hep-hey"], ["new CustomError",
-    "collectStackTrace"]);
-
+testTrace("testStrippedCustomError", testStrippedCustomError, ["hep-hey"],
+    ["new CustomError", "collectStackTrace"]);
 testCallerCensorship();
 testUnintendedCallerCensorship();
 testErrorsDuringFormatting();
diff --git a/deps/v8/test/mjsunit/tools/logreader.js b/deps/v8/test/mjsunit/tools/logreader.js
index dfd7f9f54e..8ed5ffd267 100644
--- a/deps/v8/test/mjsunit/tools/logreader.js
+++ b/deps/v8/test/mjsunit/tools/logreader.js
@@ -80,3 +80,19 @@
   assertEquals('bbbbaaaa', reader.expandBackRef_('bbbb#2:4'));
   assertEquals('"#1:1"', reader.expandBackRef_('"#1:1"'));
 })();
+
+
+// See http://code.google.com/p/v8/issues/detail?id=420
+(function testReadingTruncatedLog() {
+  // Having an incorrect event in the middle of a log should throw an exception.
+  var reader1 = new devtools.profiler.LogReader({});
+  assertThrows(function() {
+    reader1.processLogChunk('alias,a,b\nxxxx\nalias,c,d\n');
+  });
+
+  // But having it as the last record should not.
+  var reader2 = new devtools.profiler.LogReader({});
+  assertDoesNotThrow(function() {
+    reader2.processLogChunk('alias,a,b\nalias,c,d\nxxxx');
+  });
+})();
diff --git a/deps/v8/test/mjsunit/tools/tickprocessor.js b/deps/v8/test/mjsunit/tools/tickprocessor.js
index 00c3fb176b..83bdac8ab8 100644
--- a/deps/v8/test/mjsunit/tools/tickprocessor.js
+++ b/deps/v8/test/mjsunit/tools/tickprocessor.js
@@ -227,6 +227,78 @@
 })();
 
 
+// http://code.google.com/p/v8/issues/detail?id=427
+(function testWindowsProcessExeAndDllMapFile() {
+  function exeSymbols(exeName) {
+    return [
+      ' 0000:00000000       ___ImageBase               00400000     <linker-defined>',
+      ' 0001:00000780       ?RunMain@@YAHHQAPAD@Z      00401780 f   shell.obj',
+      ' 0001:00000ac0       _main                      00401ac0 f   shell.obj',
+      ''
+    ].join('\r\n');
+  }
+
+  function dllSymbols(dllName) {
+    return [
+      ' 0000:00000000       ___ImageBase               01c30000     <linker-defined>',
+      ' 0001:00000780       _DllMain@12                01c31780 f   libcmt:dllmain.obj',
+      ' 0001:00000ac0       ___DllMainCRTStartup       01c31ac0 f   libcmt:dllcrt0.obj',
+      ''
+    ].join('\r\n');
+  }
+
+  var oldRead = read;
+
+  read = exeSymbols;
+  var exe_exe_syms = [];
+  (new WindowsCppEntriesProvider()).parseVmSymbols(
+      'chrome.exe', 0x00400000, 0x00472000,
+      function (name, start, end) {
+        exe_exe_syms.push(Array.prototype.slice.apply(arguments, [0]));
+      });
+  assertEquals(
+      [['RunMain', 0x00401780, 0x00401ac0],
+       ['_main', 0x00401ac0, 0x00472000]],
+      exe_exe_syms, '.exe with .exe symbols');
+
+  read = dllSymbols;
+  var exe_dll_syms = [];
+  (new WindowsCppEntriesProvider()).parseVmSymbols(
+      'chrome.exe', 0x00400000, 0x00472000,
+      function (name, start, end) {
+        exe_dll_syms.push(Array.prototype.slice.apply(arguments, [0]));
+      });
+  assertEquals(
+      [],
+      exe_dll_syms, '.exe with .dll symbols');
+
+  read = dllSymbols;
+  var dll_dll_syms = [];
+  (new WindowsCppEntriesProvider()).parseVmSymbols(
+      'chrome.dll', 0x01c30000, 0x02b80000,
+      function (name, start, end) {
+        dll_dll_syms.push(Array.prototype.slice.apply(arguments, [0]));
+      });
+  assertEquals(
+      [['_DllMain@12', 0x01c31780, 0x01c31ac0],
+       ['___DllMainCRTStartup', 0x01c31ac0, 0x02b80000]],
+      dll_dll_syms, '.dll with .dll symbols');
+
+  read = exeSymbols;
+  var dll_exe_syms = [];
+  (new WindowsCppEntriesProvider()).parseVmSymbols(
+      'chrome.dll', 0x01c30000, 0x02b80000,
+      function (name, start, end) {
+        dll_exe_syms.push(Array.prototype.slice.apply(arguments, [0]));
+      });
+  assertEquals(
+      [],
+      dll_exe_syms, '.dll with .exe symbols');
+
+  read = oldRead;
+})();
+
+
 function CppEntriesProviderMock() {
 };
 
diff --git a/deps/v8/test/mozilla/mozilla.status b/deps/v8/test/mozilla/mozilla.status
index c4628a00b0..a1551dcdd4 100644
--- a/deps/v8/test/mozilla/mozilla.status
+++ b/deps/v8/test/mozilla/mozilla.status
@@ -278,6 +278,11 @@ js1_2/regexp/beginLine: FAIL_OK
 js1_2/regexp/endLine: FAIL_OK
 
 
+# To be compatible with safari typeof a regexp yields 'function';
+# in firefox it yields 'object'.
+js1_2/function/regexparg-1: FAIL_OK
+
+
 # Date trouble?
 js1_5/Date/regress-301738-02: FAIL_OK
 
@@ -803,10 +808,3 @@ ecma/Expressions/11.7.3: SKIP
 ecma/Expressions/11.10-3: SKIP
 ecma/Expressions/11.7.1: SKIP
 ecma_3/RegExp/regress-209067: SKIP
-
-[ $ARCH == x64 ]
-
-# Tests that fail on the 64-bit port.  This section should be empty
-# when the 64-bit port is fully debugged.
-
-js1_2/regexp/regress-9141: FAIL
diff --git a/deps/v8/tools/gyp/v8.gyp b/deps/v8/tools/gyp/v8.gyp
index 365d87cff4..b0c33318fe 100644
--- a/deps/v8/tools/gyp/v8.gyp
+++ b/deps/v8/tools/gyp/v8.gyp
@@ -32,6 +32,7 @@
     'gcc_version%': 'unknown',
     'target_arch%': 'ia32',
     'v8_use_snapshot%': 'true',
+    'v8_regexp%': 'native',
   },
   'includes': [
     '../../../build/common.gypi',
@@ -55,6 +56,7 @@
       ['target_arch=="x64"', {
         'defines': [
           'V8_TARGET_ARCH_X64',
+          'V8_NATIVE_REGEXP',
         ],
       }],
     ],
@@ -428,14 +430,18 @@
             '../../src/ia32/jump-target-ia32.cc',
             '../../src/ia32/macro-assembler-ia32.cc',
             '../../src/ia32/macro-assembler-ia32.h',
-            '../../src/ia32/regexp-macro-assembler-ia32.cc',
-            '../../src/ia32/regexp-macro-assembler-ia32.h',
             '../../src/ia32/register-allocator-ia32.cc',
             '../../src/ia32/stub-cache-ia32.cc',
             '../../src/ia32/virtual-frame-ia32.cc',
             '../../src/ia32/virtual-frame-ia32.h',
           ],
         }],
+        ['target_arch=="ia32" and v8_regexp=="native"', {
+          'sources': [
+            '../../src/ia32/regexp-macro-assembler-ia32.cc',
+            '../../src/ia32/regexp-macro-assembler-ia32.h',
+          ],
+        }],
         ['target_arch=="x64"', {
           'include_dirs+': [
             '../../src/x64',
@@ -457,14 +463,18 @@
             '../../src/x64/jump-target-x64.cc',
             '../../src/x64/macro-assembler-x64.cc',
             '../../src/x64/macro-assembler-x64.h',
-            #'../../src/x64/regexp-macro-assembler-x64.cc',
-            #'../../src/x64/regexp-macro-assembler-x64.h',
             '../../src/x64/register-allocator-x64.cc',
             '../../src/x64/stub-cache-x64.cc',
             '../../src/x64/virtual-frame-x64.cc',
             '../../src/x64/virtual-frame-x64.h',
           ],
         }],
+        ['target_arch=="x64" and v8_regexp=="native"', {
+          'sources': [
+            '../../src/x64/regexp-macro-assembler-x64.cc',
+            '../../src/x64/regexp-macro-assembler-x64.h',
+          ],
+        }],
         ['OS=="linux"', {
             'link_settings': {
               'libraries': [
diff --git a/deps/v8/tools/logreader.js b/deps/v8/tools/logreader.js
index 78085a451e..88ab907740 100644
--- a/deps/v8/tools/logreader.js
+++ b/deps/v8/tools/logreader.js
@@ -294,8 +294,11 @@ devtools.profiler.LogReader.prototype.processLog_ = function(lines) {
       this.dispatchLogRow_(fields);
     }
   } catch (e) {
-    this.printError('line ' + (i + 1) + ': ' + (e.message || e));
-    throw e;
+    // An error on the last line is acceptable since log file can be truncated.
+    if (i < n - 1) {
+      this.printError('line ' + (i + 1) + ': ' + (e.message || e));
+      throw e;
+    }
   }
 };
 
diff --git a/deps/v8/tools/mac-nm b/deps/v8/tools/mac-nm
index 9c18177978..07efb07bae 100755
--- a/deps/v8/tools/mac-nm
+++ b/deps/v8/tools/mac-nm
@@ -12,7 +12,7 @@
 # needs to be parsed, which requires a lot of knowledge to be coded in.
 
 if [ "`which c++filt`" == "" ]; then
-  nm $@
+  nm "$@"
 else
-  nm $@ | c++filt -p -i
+  nm "$@" | c++filt -p -i
 fi
diff --git a/deps/v8/tools/tickprocessor.js b/deps/v8/tools/tickprocessor.js
index 34c6195d9a..72b3059dca 100644
--- a/deps/v8/tools/tickprocessor.js
+++ b/deps/v8/tools/tickprocessor.js
@@ -499,19 +499,32 @@ function WindowsCppEntriesProvider() {
 inherits(WindowsCppEntriesProvider, CppEntriesProvider);
 
 
-WindowsCppEntriesProvider.FILENAME_RE = /^(.*)\.exe$/;
+WindowsCppEntriesProvider.FILENAME_RE = /^(.*)\.([^.]+)$/;
 
 
 WindowsCppEntriesProvider.FUNC_RE =
-    /^ 0001:[0-9a-fA-F]{8}\s+([_\?@$0-9a-zA-Z]+)\s+([0-9a-fA-F]{8}).*$/;
+    /^\s+0001:[0-9a-fA-F]{8}\s+([_\?@$0-9a-zA-Z]+)\s+([0-9a-fA-F]{8}).*$/;
+
+
+WindowsCppEntriesProvider.IMAGE_BASE_RE =
+    /^\s+0000:00000000\s+___ImageBase\s+([0-9a-fA-F]{8}).*$/;
+
+
+// This is almost a constant on Windows.
+WindowsCppEntriesProvider.EXE_IMAGE_BASE = 0x00400000;
 
 
 WindowsCppEntriesProvider.prototype.loadSymbols = function(libName) {
   var fileNameFields = libName.match(WindowsCppEntriesProvider.FILENAME_RE);
-  // Only try to load symbols for the .exe file.
   if (!fileNameFields) return;
   var mapFileName = fileNameFields[1] + '.map';
-  this.symbols = readFile(mapFileName);
+  this.moduleType_ = fileNameFields[2].toLowerCase();
+  try {
+    this.symbols = read(mapFileName);
+  } catch (e) {
+    // If .map file cannot be found let's not panic.
+    this.symbols = '';
+  }
 };
 
 
@@ -523,6 +536,18 @@ WindowsCppEntriesProvider.prototype.parseNextLine = function() {
 
   var line = this.symbols.substring(this.parsePos, lineEndPos);
   this.parsePos = lineEndPos + 2;
+
+  // Image base entry is above all other symbols, so we can just
+  // terminate parsing.
+  var imageBaseFields = line.match(WindowsCppEntriesProvider.IMAGE_BASE_RE);
+  if (imageBaseFields) {
+    var imageBase = parseInt(imageBaseFields[1], 16);
+    if ((this.moduleType_ == 'exe') !=
+        (imageBase == WindowsCppEntriesProvider.EXE_IMAGE_BASE)) {
+      return false;
+    }
+  }
+
   var fields = line.match(WindowsCppEntriesProvider.FUNC_RE);
   return fields ?
       { name: this.unmangleName(fields[1]), start: parseInt(fields[2], 16) } :
diff --git a/deps/v8/tools/visual_studio/common.vsprops b/deps/v8/tools/visual_studio/common.vsprops
index f131a4a0ca..d23e4fcfe8 100644
--- a/deps/v8/tools/visual_studio/common.vsprops
+++ b/deps/v8/tools/visual_studio/common.vsprops
@@ -10,7 +10,7 @@
 	<Tool
 		Name="VCCLCompilerTool"
 		AdditionalIncludeDirectories="$(ProjectDir)\..\..\src;$(IntDir)\DerivedSources"
-		PreprocessorDefinitions="WIN32;_CRT_SECURE_NO_DEPRECATE;_CRT_NONSTDC_NO_DEPRECATE;_USE_32BIT_TIME_T;_HAS_EXCEPTIONS=0;ENABLE_LOGGING_AND_PROFILING"
+		PreprocessorDefinitions="WIN32;_CRT_SECURE_NO_DEPRECATE;_CRT_NONSTDC_NO_DEPRECATE;_HAS_EXCEPTIONS=0;ENABLE_LOGGING_AND_PROFILING"
 		MinimalRebuild="false"
 		ExceptionHandling="0"
 		RuntimeTypeInfo="false"
diff --git a/deps/v8/tools/visual_studio/d8_x64.vcproj b/deps/v8/tools/visual_studio/d8_x64.vcproj
new file mode 100644
index 0000000000..dd2b83d06e
--- /dev/null
+++ b/deps/v8/tools/visual_studio/d8_x64.vcproj
@@ -0,0 +1,199 @@
+<?xml version="1.0" encoding="Windows-1252"?>
+<VisualStudioProject
+	ProjectType="Visual C++"
+	Version="8.00"
+	Name="d8"
+	ProjectGUID="{7E4C7D2D-A4B9-40B9-8192-22654E626F6C}"
+	RootNamespace="d8"
+	Keyword="Win32Proj"
+	>
+	<Platforms>
+		<Platform
+			Name="x64"
+		/>
+	</Platforms>
+	<ToolFiles>
+	</ToolFiles>
+	<Configurations>
+		<Configuration
+			Name="Debug|x64"
+			ConfigurationType="1"
+			InheritedPropertySheets=".\common.vsprops;.\x64.vsprops;.\debug.vsprops"
+			>
+			<Tool
+				Name="VCPreBuildEventTool"
+			/>
+			<Tool
+				Name="VCCustomBuildTool"
+			/>
+			<Tool
+				Name="VCXMLDataGeneratorTool"
+			/>
+			<Tool
+				Name="VCWebServiceProxyGeneratorTool"
+			/>
+			<Tool
+				Name="VCMIDLTool"
+			/>
+			<Tool
+				Name="VCCLCompilerTool"
+			/>
+			<Tool
+				Name="VCManagedResourceCompilerTool"
+			/>
+			<Tool
+				Name="VCResourceCompilerTool"
+			/>
+			<Tool
+				Name="VCPreLinkEventTool"
+			/>
+			<Tool
+				Name="VCLinkerTool"
+				AdditionalDependencies="winmm.lib Ws2_32.lib"
+			/>
+			<Tool
+				Name="VCALinkTool"
+			/>
+			<Tool
+				Name="VCManifestTool"
+			/>
+			<Tool
+				Name="VCXDCMakeTool"
+			/>
+			<Tool
+				Name="VCBscMakeTool"
+			/>
+			<Tool
+				Name="VCFxCopTool"
+			/>
+			<Tool
+				Name="VCAppVerifierTool"
+			/>
+			<Tool
+				Name="VCWebDeploymentTool"
+			/>
+			<Tool
+				Name="VCPostBuildEventTool"
+			/>
+		</Configuration>
+		<Configuration
+			Name="Release|x64"
+			ConfigurationType="1"
+			InheritedPropertySheets=".\common.vsprops;.\x64.vsprops;.\release.vsprops"
+			>
+			<Tool
+				Name="VCPreBuildEventTool"
+			/>
+			<Tool
+				Name="VCCustomBuildTool"
+			/>
+			<Tool
+				Name="VCXMLDataGeneratorTool"
+			/>
+			<Tool
+				Name="VCWebServiceProxyGeneratorTool"
+			/>
+			<Tool
+				Name="VCMIDLTool"
+			/>
+			<Tool
+				Name="VCCLCompilerTool"
+			/>
+			<Tool
+				Name="VCManagedResourceCompilerTool"
+			/>
+			<Tool
+				Name="VCResourceCompilerTool"
+			/>
+			<Tool
+				Name="VCPreLinkEventTool"
+			/>
+			<Tool
+				Name="VCLinkerTool"
+				AdditionalDependencies="winmm.lib Ws2_32.lib"
+			/>
+			<Tool
+				Name="VCALinkTool"
+			/>
+			<Tool
+				Name="VCManifestTool"
+			/>
+			<Tool
+				Name="VCXDCMakeTool"
+			/>
+			<Tool
+				Name="VCBscMakeTool"
+			/>
+			<Tool
+				Name="VCFxCopTool"
+			/>
+			<Tool
+				Name="VCAppVerifierTool"
+			/>
+			<Tool
+				Name="VCWebDeploymentTool"
+			/>
+			<Tool
+				Name="VCPostBuildEventTool"
+			/>
+		</Configuration>
+	</Configurations>
+	<References>
+	</References>
+	<Files>
+		<File
+			RelativePath="..\..\src\d8.cc"
+			>
+		</File>
+		<File
+			RelativePath="..\..\src\d8.h"
+			>
+		</File>
+		<File
+			RelativePath="..\..\src\d8-debug.cc"
+			>
+		</File>
+		<File
+			RelativePath="..\..\src\d8-debug.h"
+			>
+		</File>
+		<File
+			RelativePath="..\..\src\d8-windows.cc"
+			>
+		</File>
+		<File
+			RelativePath="..\..\src\d8.js"
+			>
+				<FileConfiguration
+					Name="Debug|x64"
+					>
+					<Tool
+						Name="VCCustomBuildTool"
+						Description="Processing js files..."
+						CommandLine=".\d8js2c.cmd ..\..\src &quot;$(IntDir)\DerivedSources&quot;"
+												Outputs="$(IntDir)\DerivedSources\natives.cc;$(IntDir)\DerivedSources\natives-empty.cc"
+					/>
+				</FileConfiguration>
+				<FileConfiguration
+					Name="Release|x64"
+					>
+					<Tool
+						Name="VCCustomBuildTool"
+						Description="Processing js files..."
+						CommandLine=".\d8js2c.cmd ..\..\src &quot;$(IntDir)\DerivedSources&quot;"
+						Outputs="$(IntDir)\DerivedSources\natives.cc;$(IntDir)\DerivedSources\natives-empty.cc"
+					/>
+				</FileConfiguration>
+		</File>
+		<Filter
+			Name="generated files"
+			>
+			<File
+				RelativePath="$(IntDir)\DerivedSources\natives.cc"
+				>
+			</File>
+		</Filter>
+	</Files>
+	<Globals>
+	</Globals>
+</VisualStudioProject>
diff --git a/deps/v8/tools/visual_studio/ia32.vsprops b/deps/v8/tools/visual_studio/ia32.vsprops
index aff08716fd..f48e808d84 100644
--- a/deps/v8/tools/visual_studio/ia32.vsprops
+++ b/deps/v8/tools/visual_studio/ia32.vsprops
@@ -6,6 +6,6 @@
 	>
 	<Tool
 		Name="VCCLCompilerTool"
-		PreprocessorDefinitions="V8_TARGET_ARCH_IA32;V8_NATIVE_REGEXP"
+		PreprocessorDefinitions="_USE_32BIT_TIME_T;V8_TARGET_ARCH_IA32;V8_NATIVE_REGEXP"
 	/>
 </VisualStudioPropertySheet>
diff --git a/deps/v8/tools/visual_studio/v8_base_x64.vcproj b/deps/v8/tools/visual_studio/v8_base_x64.vcproj
new file mode 100644
index 0000000000..1e27824629
--- /dev/null
+++ b/deps/v8/tools/visual_studio/v8_base_x64.vcproj
@@ -0,0 +1,963 @@
+<?xml version="1.0" encoding="Windows-1252"?>
+<VisualStudioProject
+	ProjectType="Visual C++"
+	Version="8.00"
+	Name="v8_base"
+	ProjectGUID="{EC8B7909-62AF-470D-A75D-E1D89C837142}"
+	RootNamespace="v8_base"
+	Keyword="Win32Proj"
+	>
+	<Platforms>
+		<Platform
+			Name="x64"
+		/>
+	</Platforms>
+	<ToolFiles>
+	</ToolFiles>
+	<Configurations>
+		<Configuration
+			Name="Debug|x64"
+			ConfigurationType="4"
+			InheritedPropertySheets=".\common.vsprops;.\x64.vsprops;.\debug.vsprops"
+			>
+			<Tool
+				Name="VCPreBuildEventTool"
+			/>
+			<Tool
+				Name="VCCustomBuildTool"
+			/>
+			<Tool
+				Name="VCXMLDataGeneratorTool"
+			/>
+			<Tool
+				Name="VCWebServiceProxyGeneratorTool"
+			/>
+			<Tool
+				Name="VCMIDLTool"
+			/>
+			<Tool
+				Name="VCCLCompilerTool"
+			/>
+			<Tool
+				Name="VCManagedResourceCompilerTool"
+			/>
+			<Tool
+				Name="VCResourceCompilerTool"
+			/>
+			<Tool
+				Name="VCPreLinkEventTool"
+			/>
+			<Tool
+				Name="VCLibrarianTool"
+			/>
+			<Tool
+				Name="VCALinkTool"
+			/>
+			<Tool
+				Name="VCXDCMakeTool"
+			/>
+			<Tool
+				Name="VCBscMakeTool"
+			/>
+			<Tool
+				Name="VCFxCopTool"
+			/>
+			<Tool
+				Name="VCPostBuildEventTool"
+			/>
+		</Configuration>
+		<Configuration
+			Name="Release|x64"
+			ConfigurationType="4"
+			InheritedPropertySheets=".\common.vsprops;.\x64.vsprops;.\release.vsprops"
+			>
+			<Tool
+				Name="VCPreBuildEventTool"
+			/>
+			<Tool
+				Name="VCCustomBuildTool"
+			/>
+			<Tool
+				Name="VCXMLDataGeneratorTool"
+			/>
+			<Tool
+				Name="VCWebServiceProxyGeneratorTool"
+			/>
+			<Tool
+				Name="VCMIDLTool"
+			/>
+			<Tool
+				Name="VCCLCompilerTool"
+			/>
+			<Tool
+				Name="VCManagedResourceCompilerTool"
+			/>
+			<Tool
+				Name="VCResourceCompilerTool"
+			/>
+			<Tool
+				Name="VCPreLinkEventTool"
+			/>
+			<Tool
+				Name="VCLibrarianTool"
+			/>
+			<Tool
+				Name="VCALinkTool"
+			/>
+			<Tool
+				Name="VCXDCMakeTool"
+			/>
+			<Tool
+				Name="VCBscMakeTool"
+			/>
+			<Tool
+				Name="VCFxCopTool"
+			/>
+			<Tool
+				Name="VCPostBuildEventTool"
+			/>
+		</Configuration>
+	</Configurations>
+	<References>
+	</References>
+	<Files>
+		<Filter
+			Name="dtoa"
+			>
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+				>
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+					>
+					<Tool
+						Name="VCCLCompilerTool"
+						DisableSpecificWarnings="4018;4244"
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+		</Filter>
+		<Filter
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+				RelativePath="..\..\src\regexp-macro-assembler.cc"
+				>
+			</File>
+			<File
+				RelativePath="..\..\src\regexp-macro-assembler.h"
+				>
+			</File>
+			<File
+				RelativePath="..\..\src\regexp-macro-assembler-tracer.cc"
+				>
+			</File>
+			<File
+				RelativePath="..\..\src\regexp-macro-assembler-tracer.h"
+				>
+			</File>
+			<File
+				RelativePath="..\..\src\regexp-stack.cc"
+				>
+			</File>
+			<File
+				RelativePath="..\..\src\register-allocator.h"
+				>
+			</File>
+			<File
+				RelativePath="..\..\src\register-allocator.cc"
+				>
+			</File>
+			<File
+				RelativePath="..\..\src\x64\register-allocator-x64.cc"
+				>
+			</File>
+			<File
+				RelativePath="..\..\src\rewriter.cc"
+				>
+			</File>
+			<File
+				RelativePath="..\..\src\rewriter.h"
+				>
+			</File>
+			<File
+				RelativePath="..\..\src\runtime.cc"
+				>
+			</File>
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+				RelativePath="..\..\src\runtime.h"
+				>
+			</File>
+			<File
+				RelativePath="..\..\src\scanner.cc"
+				>
+			</File>
+			<File
+				RelativePath="..\..\src\scanner.h"
+				>
+			</File>
+			<File
+				RelativePath="..\..\src\scopeinfo.cc"
+				>
+			</File>
+			<File
+				RelativePath="..\..\src\scopeinfo.h"
+				>
+			</File>
+			<File
+				RelativePath="..\..\src\scopes.cc"
+				>
+			</File>
+			<File
+				RelativePath="..\..\src\scopes.h"
+				>
+			</File>
+			<File
+				RelativePath="..\..\src\serialize.cc"
+				>
+			</File>
+			<File
+				RelativePath="..\..\src\serialize.h"
+				>
+			</File>
+			<File
+				RelativePath="..\..\src\shell.h"
+				>
+			</File>
+			<File
+				RelativePath="..\..\src\snapshot-common.cc"
+				>
+			</File>
+			<File
+				RelativePath="..\..\src\snapshot.h"
+				>
+			</File>
+			<File
+				RelativePath="..\..\src\spaces-inl.h"
+				>
+			</File>
+			<File
+				RelativePath="..\..\src\spaces.cc"
+				>
+			</File>
+			<File
+				RelativePath="..\..\src\spaces.h"
+				>
+			</File>
+			<File
+				RelativePath="..\..\src\string-stream.cc"
+				>
+			</File>
+			<File
+				RelativePath="..\..\src\string-stream.h"
+				>
+			</File>
+			<File
+				RelativePath="..\..\src\x64\stub-cache-x64.cc"
+				>
+			</File>
+			<File
+				RelativePath="..\..\src\stub-cache.cc"
+				>
+			</File>
+			<File
+				RelativePath="..\..\src\stub-cache.h"
+				>
+			</File>
+			<File
+				RelativePath="..\..\src\token.cc"
+				>
+			</File>
+			<File
+				RelativePath="..\..\src\token.h"
+				>
+			</File>
+			<File
+				RelativePath="..\..\src\top.cc"
+				>
+			</File>
+			<File
+				RelativePath="..\..\src\top.h"
+				>
+			</File>
+			<File
+				RelativePath="..\..\src\unicode-inl.h"
+				>
+			</File>
+			<File
+				RelativePath="..\..\src\unicode.h"
+				>
+			</File>
+			<File
+				RelativePath="..\..\src\usage-analyzer.cc"
+				>
+			</File>
+			<File
+				RelativePath="..\..\src\usage-analyzer.h"
+				>
+			</File>
+			<File
+				RelativePath="..\..\src\utils.cc"
+				>
+			</File>
+			<File
+				RelativePath="..\..\src\utils.h"
+				>
+			</File>
+			<File
+				RelativePath="..\..\src\v8-counters.cc"
+				>
+			</File>
+			<File
+				RelativePath="..\..\src\v8-counters.h"
+				>
+			</File>
+			<File
+				RelativePath="..\..\src\v8.cc"
+				>
+			</File>
+			<File
+				RelativePath="..\..\src\v8.h"
+				>
+			</File>
+			<File
+				RelativePath="..\..\src\v8threads.cc"
+				>
+			</File>
+			<File
+				RelativePath="..\..\src\v8threads.h"
+				>
+			</File>
+			<File
+				RelativePath="..\..\src\variables.cc"
+				>
+			</File>
+			<File
+				RelativePath="..\..\src\variables.h"
+				>
+			</File>
+			<File
+				RelativePath="..\..\src\version.cc"
+				>
+			</File>
+			<File
+				RelativePath="..\..\src\version.h"
+				>
+			</File>
+			<File
+				RelativePath="..\..\src\virtual-frame.h"
+				>
+			</File>
+			<File
+				RelativePath="..\..\src\x64\virtual-frame-x64.h"
+				>
+			</File>
+			<File
+				RelativePath="..\..\src\virtual-frame.cc"
+				>
+			</File>
+			<File
+				RelativePath="..\..\src\x64\virtual-frame-x64.cc"
+				>
+			</File>
+			<File
+				RelativePath="..\..\src\zone-inl.h"
+				>
+			</File>
+			<File
+				RelativePath="..\..\src\zone.cc"
+				>
+			</File>
+			<File
+				RelativePath="..\..\src\zone.h"
+				>
+			</File>
+			<Filter
+				Name="third party"
+				>
+				<File
+					RelativePath="..\..\src\x64\disasm-x64.cc"
+					>
+				</File>
+				<File
+					RelativePath="..\..\src\disasm.h"
+					>
+				</File>
+			</Filter>
+			<Filter
+				Name="generated files"
+				>
+				<File
+					RelativePath="..\..\src\unicode.cc"
+					>
+				</File>
+			</Filter>
+		</Filter>
+		<Filter
+			Name="include"
+			>
+			<File
+				RelativePath="..\..\include\debug.h"
+				>
+			</File>
+			<File
+				RelativePath="..\..\include\v8.h"
+				>
+			</File>
+		</Filter>
+	</Files>
+	<Globals>
+	</Globals>
+</VisualStudioProject>
diff --git a/deps/v8/tools/visual_studio/v8_cctest_x64.vcproj b/deps/v8/tools/visual_studio/v8_cctest_x64.vcproj
new file mode 100644
index 0000000000..fc7ac4be8b
--- /dev/null
+++ b/deps/v8/tools/visual_studio/v8_cctest_x64.vcproj
@@ -0,0 +1,251 @@
+<?xml version="1.0" encoding="Windows-1252"?>
+<VisualStudioProject
+	ProjectType="Visual C++"
+	Version="8.00"
+	Name="v8_cctest"
+	ProjectGUID="{97ECC711-7430-4FC4-90FD-004DA880E72A}"
+	RootNamespace="v8_cctest"
+	Keyword="Win32Proj"
+	>
+	<Platforms>
+		<Platform
+			Name="x64"
+		/>
+	</Platforms>
+	<ToolFiles>
+	</ToolFiles>
+	<Configurations>
+		<Configuration
+			Name="Debug|x64"
+			ConfigurationType="1"
+			InheritedPropertySheets=".\common.vsprops;.\x64.vsprops;.\debug.vsprops"
+			>
+			<Tool
+				Name="VCPreBuildEventTool"
+			/>
+			<Tool
+				Name="VCCustomBuildTool"
+			/>
+			<Tool
+				Name="VCXMLDataGeneratorTool"
+			/>
+			<Tool
+				Name="VCWebServiceProxyGeneratorTool"
+			/>
+			<Tool
+				Name="VCMIDLTool"
+			/>
+			<Tool
+				Name="VCCLCompilerTool"
+			/>
+			<Tool
+				Name="VCManagedResourceCompilerTool"
+			/>
+			<Tool
+				Name="VCResourceCompilerTool"
+			/>
+			<Tool
+				Name="VCPreLinkEventTool"
+			/>
+			<Tool
+				Name="VCLinkerTool"
+				AdditionalDependencies="winmm.lib Ws2_32.lib"
+			/>
+			<Tool
+				Name="VCALinkTool"
+			/>
+			<Tool
+				Name="VCManifestTool"
+			/>
+			<Tool
+				Name="VCXDCMakeTool"
+			/>
+			<Tool
+				Name="VCBscMakeTool"
+			/>
+			<Tool
+				Name="VCFxCopTool"
+			/>
+			<Tool
+				Name="VCAppVerifierTool"
+			/>
+			<Tool
+				Name="VCWebDeploymentTool"
+			/>
+			<Tool
+				Name="VCPostBuildEventTool"
+			/>
+		</Configuration>
+		<Configuration
+			Name="Release|x64"
+			ConfigurationType="1"
+			InheritedPropertySheets=".\common.vsprops;.\x64.vsprops;.\release.vsprops"
+			>
+			<Tool
+				Name="VCPreBuildEventTool"
+			/>
+			<Tool
+				Name="VCCustomBuildTool"
+			/>
+			<Tool
+				Name="VCXMLDataGeneratorTool"
+			/>
+			<Tool
+				Name="VCWebServiceProxyGeneratorTool"
+			/>
+			<Tool
+				Name="VCMIDLTool"
+			/>
+			<Tool
+				Name="VCCLCompilerTool"
+			/>
+			<Tool
+				Name="VCManagedResourceCompilerTool"
+			/>
+			<Tool
+				Name="VCResourceCompilerTool"
+			/>
+			<Tool
+				Name="VCPreLinkEventTool"
+			/>
+			<Tool
+				Name="VCLinkerTool"
+				AdditionalDependencies="winmm.lib Ws2_32.lib"
+			/>
+			<Tool
+				Name="VCALinkTool"
+			/>
+			<Tool
+				Name="VCManifestTool"
+			/>
+			<Tool
+				Name="VCXDCMakeTool"
+			/>
+			<Tool
+				Name="VCBscMakeTool"
+			/>
+			<Tool
+				Name="VCFxCopTool"
+			/>
+			<Tool
+				Name="VCAppVerifierTool"
+			/>
+			<Tool
+				Name="VCWebDeploymentTool"
+			/>
+			<Tool
+				Name="VCPostBuildEventTool"
+			/>
+		</Configuration>
+	</Configurations>
+	<References>
+	</References>
+	<Files>
+		<File
+			RelativePath="..\..\test\cctest\cctest.cc"
+			>
+		</File>
+		<File
+			RelativePath="..\..\test\cctest\test-alloc.cc"
+			>
+		</File>
+		<File
+			RelativePath="..\..\test\cctest\test-api.cc"
+			>
+		</File>
+		<File
+			RelativePath="..\..\test\cctest\test-assembler-x64.cc"
+			>
+		</File>
+		<File
+			RelativePath="..\..\test\cctest\test-ast.cc"
+			>
+		</File>
+		<File
+			RelativePath="..\..\test\cctest\test-compiler.cc"
+			>
+		</File>
+		<File
+			RelativePath="..\..\test\cctest\test-conversions.cc"
+			>
+		</File>
+		<File
+			RelativePath="..\..\test\cctest\test-debug.cc"
+			>
+		</File>
+		<File
+			RelativePath="..\..\test\cctest\test-decls.cc"
+			>
+		</File>
+		<File
+			RelativePath="..\..\test\cctest\test-disasm-x64.cc"
+			>
+		</File>
+		<File
+			RelativePath="..\..\test\cctest\test-flags.cc"
+			>
+		</File>
+		<File
+			RelativePath="..\..\test\cctest\test-func-name-inference.cc"
+			>
+		</File>
+		<File
+			RelativePath="..\..\test\cctest\test-hashmap.cc"
+			>
+		</File>
+		<File
+			RelativePath="..\..\test\cctest\test-heap.cc"
+			>
+		</File>
+		<File
+			RelativePath="..\..\test\cctest\test-lock.cc"
+			>
+		</File>
+		<File
+			RelativePath="..\..\test\cctest\test-log.cc"
+			>
+		</File>
+		<File
+			RelativePath="..\..\test\cctest\test-log-utils.cc"
+			>
+		</File>
+		<File
+			RelativePath="..\..\test\cctest\test-log-stack-tracer.cc"
+			>
+		</File>
+		<File
+			RelativePath="..\..\test\cctest\test-mark-compact.cc"
+			>
+		</File>
+		<File
+			RelativePath="..\..\test\cctest\test-platform-win32.cc"
+			>
+		</File>
+		<File
+			RelativePath="..\..\test\cctest\test-serialize.cc"
+			>
+		</File>
+		<File
+			RelativePath="..\..\test\cctest\test-sockets.cc"
+			>
+		</File>
+		<File
+			RelativePath="..\..\test\cctest\test-spaces.cc"
+			>
+		</File>
+		<File
+			RelativePath="..\..\test\cctest\test-strings.cc"
+			>
+		</File>
+		<File
+			RelativePath="..\..\test\cctest\test-utils.cc"
+			>
+		</File>
+		<File
+			RelativePath="..\..\test\cctest\test-version.cc"
+			>
+		</File>
+	</Files>
+	<Globals>
+	</Globals>
+</VisualStudioProject>
diff --git a/deps/v8/tools/visual_studio/v8_mksnapshot_x64.vcproj b/deps/v8/tools/visual_studio/v8_mksnapshot_x64.vcproj
new file mode 100644
index 0000000000..1c460e4db6
--- /dev/null
+++ b/deps/v8/tools/visual_studio/v8_mksnapshot_x64.vcproj
@@ -0,0 +1,151 @@
+<?xml version="1.0" encoding="Windows-1252"?>
+<VisualStudioProject
+	ProjectType="Visual C++"
+	Version="8.00"
+	Name="v8_mksnapshot"
+	ProjectGUID="{865575D0-37E2-405E-8CBA-5F6C485B5A26}"
+	RootNamespace="v8_mksnapshot"
+	Keyword="Win32Proj"
+	>
+	<Platforms>
+		<Platform
+			Name="x64"
+		/>
+	</Platforms>
+	<ToolFiles>
+	</ToolFiles>
+	<Configurations>
+		<Configuration
+			Name="Debug|x64"
+			ConfigurationType="1"
+			InheritedPropertySheets=".\common.vsprops;.\x64.vsprops;.\debug.vsprops"
+			>
+			<Tool
+				Name="VCPreBuildEventTool"
+			/>
+			<Tool
+				Name="VCCustomBuildTool"
+			/>
+			<Tool
+				Name="VCXMLDataGeneratorTool"
+			/>
+			<Tool
+				Name="VCWebServiceProxyGeneratorTool"
+			/>
+			<Tool
+				Name="VCMIDLTool"
+			/>
+			<Tool
+				Name="VCCLCompilerTool"
+			/>
+			<Tool
+				Name="VCManagedResourceCompilerTool"
+			/>
+			<Tool
+				Name="VCResourceCompilerTool"
+			/>
+			<Tool
+				Name="VCPreLinkEventTool"
+			/>
+			<Tool
+				Name="VCLinkerTool"
+				AdditionalDependencies="winmm.lib Ws2_32.lib"
+			/>
+			<Tool
+				Name="VCALinkTool"
+			/>
+			<Tool
+				Name="VCManifestTool"
+			/>
+			<Tool
+				Name="VCXDCMakeTool"
+			/>
+			<Tool
+				Name="VCBscMakeTool"
+			/>
+			<Tool
+				Name="VCFxCopTool"
+			/>
+			<Tool
+				Name="VCAppVerifierTool"
+			/>
+			<Tool
+				Name="VCWebDeploymentTool"
+			/>
+			<Tool
+				Name="VCPostBuildEventTool"
+			/>
+		</Configuration>
+		<Configuration
+			Name="Release|x64"
+			ConfigurationType="1"
+			InheritedPropertySheets=".\common.vsprops;.\x64.vsprops;.\release.vsprops"
+			>
+			<Tool
+				Name="VCPreBuildEventTool"
+			/>
+			<Tool
+				Name="VCCustomBuildTool"
+			/>
+			<Tool
+				Name="VCXMLDataGeneratorTool"
+			/>
+			<Tool
+				Name="VCWebServiceProxyGeneratorTool"
+			/>
+			<Tool
+				Name="VCMIDLTool"
+			/>
+			<Tool
+				Name="VCCLCompilerTool"
+			/>
+			<Tool
+				Name="VCManagedResourceCompilerTool"
+			/>
+			<Tool
+				Name="VCResourceCompilerTool"
+			/>
+			<Tool
+				Name="VCPreLinkEventTool"
+			/>
+			<Tool
+				Name="VCLinkerTool"
+				AdditionalDependencies="winmm.lib Ws2_32.lib"
+			/>
+			<Tool
+				Name="VCALinkTool"
+			/>
+			<Tool
+				Name="VCManifestTool"
+			/>
+			<Tool
+				Name="VCXDCMakeTool"
+			/>
+			<Tool
+				Name="VCBscMakeTool"
+			/>
+			<Tool
+				Name="VCFxCopTool"
+			/>
+			<Tool
+				Name="VCAppVerifierTool"
+			/>
+			<Tool
+				Name="VCWebDeploymentTool"
+			/>
+			<Tool
+				Name="VCPostBuildEventTool"
+			/>
+		</Configuration>
+	</Configurations>
+	<References>
+	</References>
+	<Files>
+		<File
+			RelativePath="..\..\src\mksnapshot.cc"
+			>
+		</File>
+	</Files>
+	<Globals>
+	</Globals>
+</VisualStudioProject>
diff --git a/deps/v8/tools/visual_studio/v8_process_sample_x64.vcproj b/deps/v8/tools/visual_studio/v8_process_sample_x64.vcproj
new file mode 100644
index 0000000000..81adbe0fb4
--- /dev/null
+++ b/deps/v8/tools/visual_studio/v8_process_sample_x64.vcproj
@@ -0,0 +1,151 @@
+<?xml version="1.0" encoding="Windows-1252"?>
+<VisualStudioProject
+	ProjectType="Visual C++"
+	Version="8.00"
+	Name="v8_process_sample"
+	ProjectGUID="{EF019874-D38A-40E3-B17C-DB5923F0A79C}"
+	RootNamespace="v8_process_sample"
+	Keyword="Win32Proj"
+	>
+	<Platforms>
+		<Platform
+			Name="x64"
+		/>
+	</Platforms>
+	<ToolFiles>
+	</ToolFiles>
+	<Configurations>
+		<Configuration
+			Name="Debug|x64"
+			ConfigurationType="1"
+			InheritedPropertySheets=".\common.vsprops;.\x64.vsprops;.\debug.vsprops"
+			>
+			<Tool
+				Name="VCPreBuildEventTool"
+			/>
+			<Tool
+				Name="VCCustomBuildTool"
+			/>
+			<Tool
+				Name="VCXMLDataGeneratorTool"
+			/>
+			<Tool
+				Name="VCWebServiceProxyGeneratorTool"
+			/>
+			<Tool
+				Name="VCMIDLTool"
+			/>
+			<Tool
+				Name="VCCLCompilerTool"
+			/>
+			<Tool
+				Name="VCManagedResourceCompilerTool"
+			/>
+			<Tool
+				Name="VCResourceCompilerTool"
+			/>
+			<Tool
+				Name="VCPreLinkEventTool"
+			/>
+			<Tool
+				Name="VCLinkerTool"
+				AdditionalDependencies="winmm.lib Ws2_32.lib"
+			/>
+			<Tool
+				Name="VCALinkTool"
+			/>
+			<Tool
+				Name="VCManifestTool"
+			/>
+			<Tool
+				Name="VCXDCMakeTool"
+			/>
+			<Tool
+				Name="VCBscMakeTool"
+			/>
+			<Tool
+				Name="VCFxCopTool"
+			/>
+			<Tool
+				Name="VCAppVerifierTool"
+			/>
+			<Tool
+				Name="VCWebDeploymentTool"
+			/>
+			<Tool
+				Name="VCPostBuildEventTool"
+			/>
+		</Configuration>
+		<Configuration
+			Name="Release|x64"
+			ConfigurationType="1"
+			InheritedPropertySheets=".\common.vsprops;.\x64.vsprops;.\release.vsprops"
+			>
+			<Tool
+				Name="VCPreBuildEventTool"
+			/>
+			<Tool
+				Name="VCCustomBuildTool"
+			/>
+			<Tool
+				Name="VCXMLDataGeneratorTool"
+			/>
+			<Tool
+				Name="VCWebServiceProxyGeneratorTool"
+			/>
+			<Tool
+				Name="VCMIDLTool"
+			/>
+			<Tool
+				Name="VCCLCompilerTool"
+			/>
+			<Tool
+				Name="VCManagedResourceCompilerTool"
+			/>
+			<Tool
+				Name="VCResourceCompilerTool"
+			/>
+			<Tool
+				Name="VCPreLinkEventTool"
+			/>
+			<Tool
+				Name="VCLinkerTool"
+				AdditionalDependencies="winmm.lib Ws2_32.lib"
+			/>
+			<Tool
+				Name="VCALinkTool"
+			/>
+			<Tool
+				Name="VCManifestTool"
+			/>
+			<Tool
+				Name="VCXDCMakeTool"
+			/>
+			<Tool
+				Name="VCBscMakeTool"
+			/>
+			<Tool
+				Name="VCFxCopTool"
+			/>
+			<Tool
+				Name="VCAppVerifierTool"
+			/>
+			<Tool
+				Name="VCWebDeploymentTool"
+			/>
+			<Tool
+				Name="VCPostBuildEventTool"
+			/>
+		</Configuration>
+	</Configurations>
+	<References>
+	</References>
+	<Files>
+		<File
+			RelativePath="..\..\samples\process.cc"
+			>
+		</File>
+	</Files>
+	<Globals>
+	</Globals>
+</VisualStudioProject>
diff --git a/deps/v8/tools/visual_studio/v8_shell_sample_x64.vcproj b/deps/v8/tools/visual_studio/v8_shell_sample_x64.vcproj
new file mode 100644
index 0000000000..ab276f4876
--- /dev/null
+++ b/deps/v8/tools/visual_studio/v8_shell_sample_x64.vcproj
@@ -0,0 +1,151 @@
+<?xml version="1.0" encoding="Windows-1252"?>
+<VisualStudioProject
+	ProjectType="Visual C++"
+	Version="8.00"
+	Name="v8_shell_sample"
+	ProjectGUID="{2DE20FFA-6F5E-48D9-84D8-09B044A5B119}"
+	RootNamespace="v8_shell_sample"
+	Keyword="Win32Proj"
+	>
+	<Platforms>
+		<Platform
+			Name="x64"
+		/>
+	</Platforms>
+	<ToolFiles>
+	</ToolFiles>
+	<Configurations>
+		<Configuration
+			Name="Debug|x64"
+			ConfigurationType="1"
+			InheritedPropertySheets=".\common.vsprops;.\x64.vsprops;.\debug.vsprops"
+			>
+			<Tool
+				Name="VCPreBuildEventTool"
+			/>
+			<Tool
+				Name="VCCustomBuildTool"
+			/>
+			<Tool
+				Name="VCXMLDataGeneratorTool"
+			/>
+			<Tool
+				Name="VCWebServiceProxyGeneratorTool"
+			/>
+			<Tool
+				Name="VCMIDLTool"
+			/>
+			<Tool
+				Name="VCCLCompilerTool"
+			/>
+			<Tool
+				Name="VCManagedResourceCompilerTool"
+			/>
+			<Tool
+				Name="VCResourceCompilerTool"
+			/>
+			<Tool
+				Name="VCPreLinkEventTool"
+			/>
+			<Tool
+				Name="VCLinkerTool"
+				AdditionalDependencies="winmm.lib Ws2_32.lib"
+			/>
+			<Tool
+				Name="VCALinkTool"
+			/>
+			<Tool
+				Name="VCManifestTool"
+			/>
+			<Tool
+				Name="VCXDCMakeTool"
+			/>
+			<Tool
+				Name="VCBscMakeTool"
+			/>
+			<Tool
+				Name="VCFxCopTool"
+			/>
+			<Tool
+				Name="VCAppVerifierTool"
+			/>
+			<Tool
+				Name="VCWebDeploymentTool"
+			/>
+			<Tool
+				Name="VCPostBuildEventTool"
+			/>
+		</Configuration>
+		<Configuration
+			Name="Release|x64"
+			ConfigurationType="1"
+			InheritedPropertySheets=".\common.vsprops;.\x64.vsprops;.\release.vsprops"
+			>
+			<Tool
+				Name="VCPreBuildEventTool"
+			/>
+			<Tool
+				Name="VCCustomBuildTool"
+			/>
+			<Tool
+				Name="VCXMLDataGeneratorTool"
+			/>
+			<Tool
+				Name="VCWebServiceProxyGeneratorTool"
+			/>
+			<Tool
+				Name="VCMIDLTool"
+			/>
+			<Tool
+				Name="VCCLCompilerTool"
+			/>
+			<Tool
+				Name="VCManagedResourceCompilerTool"
+			/>
+			<Tool
+				Name="VCResourceCompilerTool"
+			/>
+			<Tool
+				Name="VCPreLinkEventTool"
+			/>
+			<Tool
+				Name="VCLinkerTool"
+				AdditionalDependencies="winmm.lib Ws2_32.lib"
+			/>
+			<Tool
+				Name="VCALinkTool"
+			/>
+			<Tool
+				Name="VCManifestTool"
+			/>
+			<Tool
+				Name="VCXDCMakeTool"
+			/>
+			<Tool
+				Name="VCBscMakeTool"
+			/>
+			<Tool
+				Name="VCFxCopTool"
+			/>
+			<Tool
+				Name="VCAppVerifierTool"
+			/>
+			<Tool
+				Name="VCWebDeploymentTool"
+			/>
+			<Tool
+				Name="VCPostBuildEventTool"
+			/>
+		</Configuration>
+	</Configurations>
+	<References>
+	</References>
+	<Files>
+		<File
+			RelativePath="..\..\samples\shell.cc"
+			>
+		</File>
+	</Files>
+	<Globals>
+	</Globals>
+</VisualStudioProject>
diff --git a/deps/v8/tools/visual_studio/v8_snapshot_cc_x64.vcproj b/deps/v8/tools/visual_studio/v8_snapshot_cc_x64.vcproj
new file mode 100644
index 0000000000..9c6f9d2f00
--- /dev/null
+++ b/deps/v8/tools/visual_studio/v8_snapshot_cc_x64.vcproj
@@ -0,0 +1,92 @@
+<?xml version="1.0" encoding="Windows-1252"?>
+<VisualStudioProject
+	ProjectType="Visual C++"
+	Version="8.00"
+	Name="v8_snapshot_cc"
+	ProjectGUID="{0DDBDA8B-A49F-4CC7-A1D5-5BB8297C8A3F}"
+	RootNamespace="v8_snapshot_cc"
+	Keyword="Win32Proj"
+	>
+	<Platforms>
+		<Platform
+			Name="x64"
+		/>
+	</Platforms>
+	<ToolFiles>
+	</ToolFiles>
+	<Configurations>
+		<Configuration
+			Name="Debug|x64"
+			ConfigurationType="10"
+			InheritedPropertySheets=".\common.vsprops;.\x64.vsprops;.\debug.vsprops"
+			>
+			<Tool
+				Name="VCPreBuildEventTool"
+			/>
+			<Tool
+				Name="VCCustomBuildTool"
+			/>
+			<Tool
+				Name="VCMIDLTool"
+			/>
+			<Tool
+				Name="VCPostBuildEventTool"
+			/>
+		</Configuration>
+		<Configuration
+			Name="Release|x64"
+			ConfigurationType="10"
+			InheritedPropertySheets=".\common.vsprops;.\x64.vsprops;.\release.vsprops"
+			>
+			<Tool
+				Name="VCPreBuildEventTool"
+			/>
+			<Tool
+				Name="VCCustomBuildTool"
+			/>
+			<Tool
+				Name="VCMIDLTool"
+			/>
+			<Tool
+				Name="VCPostBuildEventTool"
+			/>
+		</Configuration>
+	</Configurations>
+	<References>
+	</References>
+	<Files>
+		<Filter
+			Name="generated files"
+			SourceControlFiles="false"
+			>
+      <File
+        RelativePath="$(OutDir)\v8_mksnapshot.exe"
+        >
+        <FileConfiguration
+          Name="Debug|x64"
+          >
+          <Tool
+            Name="VCCustomBuildTool"
+            Description="Building snapshot..."
+            CommandLine="&quot;$(OutDir)\v8_mksnapshot.exe&quot; &quot;$(IntDir)\DerivedSources\snapshot.cc&quot;&#x0D;&#x0A;"
+            AdditionalDependencies="$(OutDir)\v8_mksnapshot.exe"
+            Outputs="$(IntDir)\DerivedSources\snapshot.cc"
+          />
+        </FileConfiguration>
+        <FileConfiguration
+          Name="Release|x64"
+          >
+          <Tool
+            Name="VCCustomBuildTool"
+            Description="Building snapshot..."
+            CommandLine="&quot;$(OutDir)\v8_mksnapshot.exe&quot; &quot;$(IntDir)\DerivedSources\snapshot.cc&quot;&#x0D;&#x0A;"
+            AdditionalDependencies="$(OutDir)\v8_mksnapshot.exe"
+            Outputs="$(IntDir)\DerivedSources\snapshot.cc"
+          />
+        </FileConfiguration>
+      </File>
+		</Filter>
+	</Files>
+	<Globals>
+	</Globals>
+</VisualStudioProject>
diff --git a/deps/v8/tools/visual_studio/v8_snapshot_x64.vcproj b/deps/v8/tools/visual_studio/v8_snapshot_x64.vcproj
new file mode 100644
index 0000000000..0f6c70faf9
--- /dev/null
+++ b/deps/v8/tools/visual_studio/v8_snapshot_x64.vcproj
@@ -0,0 +1,142 @@
+<?xml version="1.0" encoding="Windows-1252"?>
+<VisualStudioProject
+	ProjectType="Visual C++"
+	Version="8.00"
+	Name="v8_snapshot"
+	ProjectGUID="{C0334F9A-1168-4101-9DD8-C30FB252D435}"
+	RootNamespace="v8_snapshot"
+	Keyword="Win32Proj"
+	>
+	<Platforms>
+		<Platform
+			Name="x64"
+		/>
+	</Platforms>
+	<ToolFiles>
+	</ToolFiles>
+	<Configurations>
+		<Configuration
+			Name="Debug|x64"
+			ConfigurationType="4"
+			InheritedPropertySheets=".\common.vsprops;.\x64.vsprops;.\debug.vsprops"
+			>
+			<Tool
+				Name="VCPreBuildEventTool"
+			/>
+			<Tool
+				Name="VCCustomBuildTool"
+			/>
+			<Tool
+				Name="VCXMLDataGeneratorTool"
+			/>
+			<Tool
+				Name="VCWebServiceProxyGeneratorTool"
+			/>
+			<Tool
+				Name="VCMIDLTool"
+			/>
+			<Tool
+				Name="VCCLCompilerTool"
+			/>
+			<Tool
+				Name="VCManagedResourceCompilerTool"
+			/>
+			<Tool
+				Name="VCResourceCompilerTool"
+			/>
+			<Tool
+				Name="VCPreLinkEventTool"
+			/>
+			<Tool
+				Name="VCLibrarianTool"
+				LinkLibraryDependencies="true"
+			/>
+			<Tool
+				Name="VCALinkTool"
+			/>
+			<Tool
+				Name="VCXDCMakeTool"
+			/>
+			<Tool
+				Name="VCBscMakeTool"
+			/>
+			<Tool
+				Name="VCFxCopTool"
+			/>
+			<Tool
+				Name="VCPostBuildEventTool"
+			/>
+		</Configuration>
+		<Configuration
+			Name="Release|x64"
+			ConfigurationType="4"
+			InheritedPropertySheets=".\common.vsprops;.\x64.vsprops;.\release.vsprops"
+			>
+			<Tool
+				Name="VCPreBuildEventTool"
+			/>
+			<Tool
+				Name="VCCustomBuildTool"
+			/>
+			<Tool
+				Name="VCXMLDataGeneratorTool"
+			/>
+			<Tool
+				Name="VCWebServiceProxyGeneratorTool"
+			/>
+			<Tool
+				Name="VCMIDLTool"
+			/>
+			<Tool
+				Name="VCCLCompilerTool"
+			/>
+			<Tool
+				Name="VCManagedResourceCompilerTool"
+			/>
+			<Tool
+				Name="VCResourceCompilerTool"
+			/>
+			<Tool
+				Name="VCPreLinkEventTool"
+			/>
+			<Tool
+				Name="VCLibrarianTool"
+				LinkLibraryDependencies="true"
+			/>
+			<Tool
+				Name="VCALinkTool"
+			/>
+			<Tool
+				Name="VCXDCMakeTool"
+			/>
+			<Tool
+				Name="VCBscMakeTool"
+			/>
+			<Tool
+				Name="VCFxCopTool"
+			/>
+			<Tool
+				Name="VCPostBuildEventTool"
+			/>
+		</Configuration>
+	</Configurations>
+	<References>
+	</References>
+	<Files>
+		<Filter
+			Name="generated files"
+			SourceControlFiles="false"
+			>
+			<File
+				RelativePath="$(IntDir)\..\v8\DerivedSources\natives-empty.cc"
+				>
+			</File>
+			<File
+				RelativePath="$(IntDir)\..\v8_snapshot_cc\DerivedSources\snapshot.cc"
+				>
+			</File>
+		</Filter>
+	</Files>
+	<Globals>
+	</Globals>
+</VisualStudioProject>
diff --git a/deps/v8/tools/visual_studio/v8_x64.sln b/deps/v8/tools/visual_studio/v8_x64.sln
new file mode 100644
index 0000000000..1fa2f16cb7
--- /dev/null
+++ b/deps/v8/tools/visual_studio/v8_x64.sln
@@ -0,0 +1,101 @@
+Microsoft Visual Studio Solution File, Format Version 9.00
+# Visual Studio 2005
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "v8_base", "v8_base_x64.vcproj", "{EC8B7909-62AF-470D-A75D-E1D89C837142}"
+EndProject
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "v8", "v8_x64.vcproj", "{21E22961-22BF-4493-BD3A-868F93DA5179}"
+	ProjectSection(ProjectDependencies) = postProject
+		{EC8B7909-62AF-470D-A75D-E1D89C837142} = {EC8B7909-62AF-470D-A75D-E1D89C837142}
+	EndProjectSection
+EndProject
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "v8_mksnapshot", "v8_mksnapshot_x64.vcproj", "{865575D0-37E2-405E-8CBA-5F6C485B5A26}"
+	ProjectSection(ProjectDependencies) = postProject
+		{21E22961-22BF-4493-BD3A-868F93DA5179} = {21E22961-22BF-4493-BD3A-868F93DA5179}
+	EndProjectSection
+EndProject
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "v8_snapshot", "v8_snapshot_x64.vcproj", "{C0334F9A-1168-4101-9DD8-C30FB252D435}"
+	ProjectSection(ProjectDependencies) = postProject
+		{0DDBDA8B-A49F-4CC7-A1D5-5BB8297C8A3F} = {0DDBDA8B-A49F-4CC7-A1D5-5BB8297C8A3F}
+		{EC8B7909-62AF-470D-A75D-E1D89C837142} = {EC8B7909-62AF-470D-A75D-E1D89C837142}
+	EndProjectSection
+EndProject
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "v8_shell_sample", "v8_shell_sample_x64.vcproj", "{2DE20FFA-6F5E-48D9-84D8-09B044A5B119}"
+	ProjectSection(ProjectDependencies) = postProject
+		{C0334F9A-1168-4101-9DD8-C30FB252D435} = {C0334F9A-1168-4101-9DD8-C30FB252D435}
+	EndProjectSection
+EndProject
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "samples", "samples", "{E131F77D-B713-48F3-B86D-097ECDCC4C3A}"
+EndProject
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "v8_process_sample", "v8_process_sample_x64.vcproj", "{EF019874-D38A-40E3-B17C-DB5923F0A79C}"
+	ProjectSection(ProjectDependencies) = postProject
+		{C0334F9A-1168-4101-9DD8-C30FB252D435} = {C0334F9A-1168-4101-9DD8-C30FB252D435}
+	EndProjectSection
+EndProject
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "v8_cctest", "v8_cctest_x64.vcproj", "{97ECC711-7430-4FC4-90FD-004DA880E72A}"
+	ProjectSection(ProjectDependencies) = postProject
+		{C0334F9A-1168-4101-9DD8-C30FB252D435} = {C0334F9A-1168-4101-9DD8-C30FB252D435}
+	EndProjectSection
+EndProject
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "test", "test", "{AD933CE2-1303-448E-89C8-60B1FDD18EC3}"
+EndProject
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "d8", "d8_x64.vcproj", "{7E4C7D2D-A4B9-40B9-8192-22654E626F6C}"
+	ProjectSection(ProjectDependencies) = postProject
+		{C0334F9A-1168-4101-9DD8-C30FB252D435} = {C0334F9A-1168-4101-9DD8-C30FB252D435}
+	EndProjectSection
+EndProject
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "v8_snapshot_cc", "v8_snapshot_cc_x64.vcproj", "{0DDBDA8B-A49F-4CC7-A1D5-5BB8297C8A3F}"
+	ProjectSection(ProjectDependencies) = postProject
+		{865575D0-37E2-405E-8CBA-5F6C485B5A26} = {865575D0-37E2-405E-8CBA-5F6C485B5A26}
+	EndProjectSection
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|x64 = Debug|x64
+		Release|x64 = Release|x64
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{0DDBDA8B-A49F-4CC7-A1D5-5BB8297C8A3F}.Debug|x64.ActiveCfg = Debug|x64
+		{0DDBDA8B-A49F-4CC7-A1D5-5BB8297C8A3F}.Debug|x64.Build.0 = Debug|x64
+		{0DDBDA8B-A49F-4CC7-A1D5-5BB8297C8A3F}.Release|x64.ActiveCfg = Release|x64
+		{0DDBDA8B-A49F-4CC7-A1D5-5BB8297C8A3F}.Release|x64.Build.0 = Release|x64
+		{21E22961-22BF-4493-BD3A-868F93DA5179}.Debug|x64.ActiveCfg = Debug|x64
+		{21E22961-22BF-4493-BD3A-868F93DA5179}.Debug|x64.Build.0 = Debug|x64
+		{21E22961-22BF-4493-BD3A-868F93DA5179}.Release|x64.ActiveCfg = Release|x64
+		{21E22961-22BF-4493-BD3A-868F93DA5179}.Release|x64.Build.0 = Release|x64
+		{2DE20FFA-6F5E-48D9-84D8-09B044A5B119}.Debug|x64.ActiveCfg = Debug|x64
+		{2DE20FFA-6F5E-48D9-84D8-09B044A5B119}.Debug|x64.Build.0 = Debug|x64
+		{2DE20FFA-6F5E-48D9-84D8-09B044A5B119}.Release|x64.ActiveCfg = Release|x64
+		{2DE20FFA-6F5E-48D9-84D8-09B044A5B119}.Release|x64.Build.0 = Release|x64
+		{7E4C7D2D-A4B9-40B9-8192-22654E626F6C}.Debug|x64.ActiveCfg = Debug|x64
+		{7E4C7D2D-A4B9-40B9-8192-22654E626F6C}.Debug|x64.Build.0 = Debug|x64
+		{7E4C7D2D-A4B9-40B9-8192-22654E626F6C}.Release|x64.ActiveCfg = Release|x64
+		{7E4C7D2D-A4B9-40B9-8192-22654E626F6C}.Release|x64.Build.0 = Release|x64
+		{865575D0-37E2-405E-8CBA-5F6C485B5A26}.Debug|x64.ActiveCfg = Debug|x64
+		{865575D0-37E2-405E-8CBA-5F6C485B5A26}.Debug|x64.Build.0 = Debug|x64
+		{865575D0-37E2-405E-8CBA-5F6C485B5A26}.Release|x64.ActiveCfg = Release|x64
+		{865575D0-37E2-405E-8CBA-5F6C485B5A26}.Release|x64.Build.0 = Release|x64
+		{97ECC711-7430-4FC4-90FD-004DA880E72A}.Debug|x64.ActiveCfg = Debug|x64
+		{97ECC711-7430-4FC4-90FD-004DA880E72A}.Debug|x64.Build.0 = Debug|x64
+		{97ECC711-7430-4FC4-90FD-004DA880E72A}.Release|x64.ActiveCfg = Release|x64
+		{97ECC711-7430-4FC4-90FD-004DA880E72A}.Release|x64.Build.0 = Release|x64
+		{C0334F9A-1168-4101-9DD8-C30FB252D435}.Debug|x64.ActiveCfg = Debug|x64
+		{C0334F9A-1168-4101-9DD8-C30FB252D435}.Debug|x64.Build.0 = Debug|x64
+		{C0334F9A-1168-4101-9DD8-C30FB252D435}.Release|x64.ActiveCfg = Release|x64
+		{C0334F9A-1168-4101-9DD8-C30FB252D435}.Release|x64.Build.0 = Release|x64
+		{EC8B7909-62AF-470D-A75D-E1D89C837142}.Debug|x64.ActiveCfg = Debug|x64
+		{EC8B7909-62AF-470D-A75D-E1D89C837142}.Debug|x64.Build.0 = Debug|x64
+		{EC8B7909-62AF-470D-A75D-E1D89C837142}.Release|x64.ActiveCfg = Release|x64
+		{EC8B7909-62AF-470D-A75D-E1D89C837142}.Release|x64.Build.0 = Release|x64
+		{EF019874-D38A-40E3-B17C-DB5923F0A79C}.Debug|x64.ActiveCfg = Debug|x64
+		{EF019874-D38A-40E3-B17C-DB5923F0A79C}.Debug|x64.Build.0 = Debug|x64
+		{EF019874-D38A-40E3-B17C-DB5923F0A79C}.Release|x64.ActiveCfg = Release|x64
+		{EF019874-D38A-40E3-B17C-DB5923F0A79C}.Release|x64.Build.0 = Release|x64
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(NestedProjects) = preSolution
+		{2DE20FFA-6F5E-48D9-84D8-09B044A5B119} = {E131F77D-B713-48F3-B86D-097ECDCC4C3A}
+		{97ECC711-7430-4FC4-90FD-004DA880E72A} = {AD933CE2-1303-448E-89C8-60B1FDD18EC3}
+		{EF019874-D38A-40E3-B17C-DB5923F0A79C} = {E131F77D-B713-48F3-B86D-097ECDCC4C3A}
+	EndGlobalSection
+EndGlobal
diff --git a/deps/v8/tools/visual_studio/v8_x64.vcproj b/deps/v8/tools/visual_studio/v8_x64.vcproj
new file mode 100644
index 0000000000..cbf88c918d
--- /dev/null
+++ b/deps/v8/tools/visual_studio/v8_x64.vcproj
@@ -0,0 +1,223 @@
+<?xml version="1.0" encoding="Windows-1252"?>
+<VisualStudioProject
+	ProjectType="Visual C++"
+	Version="8.00"
+	Name="v8"
+	ProjectGUID="{21E22961-22BF-4493-BD3A-868F93DA5179}"
+	RootNamespace="v8"
+	Keyword="Win32Proj"
+	>
+	<Platforms>
+		<Platform
+			Name="x64"
+		/>
+	</Platforms>
+	<ToolFiles>
+	</ToolFiles>
+	<Configurations>
+		<Configuration
+			Name="Debug|x64"
+			ConfigurationType="4"
+			InheritedPropertySheets=".\common.vsprops;.\x64.vsprops;.\debug.vsprops"
+			>
+			<Tool
+				Name="VCPreBuildEventTool"
+			/>
+			<Tool
+				Name="VCCustomBuildTool"
+			/>
+			<Tool
+				Name="VCXMLDataGeneratorTool"
+			/>
+			<Tool
+				Name="VCWebServiceProxyGeneratorTool"
+			/>
+			<Tool
+				Name="VCMIDLTool"
+			/>
+			<Tool
+				Name="VCCLCompilerTool"
+			/>
+			<Tool
+				Name="VCManagedResourceCompilerTool"
+			/>
+			<Tool
+				Name="VCResourceCompilerTool"
+			/>
+			<Tool
+				Name="VCPreLinkEventTool"
+			/>
+			<Tool
+				Name="VCLibrarianTool"
+				LinkLibraryDependencies="true"
+			/>
+			<Tool
+				Name="VCALinkTool"
+			/>
+			<Tool
+				Name="VCXDCMakeTool"
+			/>
+			<Tool
+				Name="VCBscMakeTool"
+			/>
+			<Tool
+				Name="VCFxCopTool"
+			/>
+			<Tool
+				Name="VCPostBuildEventTool"
+			/>
+		</Configuration>
+		<Configuration
+			Name="Release|x64"
+			ConfigurationType="4"
+			InheritedPropertySheets=".\common.vsprops;.\x64.vsprops;.\release.vsprops"
+			>
+			<Tool
+				Name="VCPreBuildEventTool"
+			/>
+			<Tool
+				Name="VCCustomBuildTool"
+			/>
+			<Tool
+				Name="VCXMLDataGeneratorTool"
+			/>
+			<Tool
+				Name="VCWebServiceProxyGeneratorTool"
+			/>
+			<Tool
+				Name="VCMIDLTool"
+			/>
+			<Tool
+				Name="VCCLCompilerTool"
+			/>
+			<Tool
+				Name="VCManagedResourceCompilerTool"
+			/>
+			<Tool
+				Name="VCResourceCompilerTool"
+			/>
+			<Tool
+				Name="VCPreLinkEventTool"
+			/>
+			<Tool
+				Name="VCLibrarianTool"
+				LinkLibraryDependencies="true"
+			/>
+			<Tool
+				Name="VCALinkTool"
+			/>
+			<Tool
+				Name="VCXDCMakeTool"
+			/>
+			<Tool
+				Name="VCBscMakeTool"
+			/>
+			<Tool
+				Name="VCFxCopTool"
+			/>
+			<Tool
+				Name="VCPostBuildEventTool"
+			/>
+		</Configuration>
+	</Configurations>
+	<References>
+	</References>
+	<Files>
+		<Filter
+			Name="js"
+			>
+			<File
+				RelativePath="..\..\src\apinatives.js"
+				>
+			</File>
+			<File
+				RelativePath="..\..\src\array.js"
+				>
+			</File>
+			<File
+				RelativePath="..\..\src\date-delay.js"
+				>
+			</File>
+			<File
+				RelativePath="..\..\src\debug-delay.js"
+				>
+			</File>
+			<File
+				RelativePath="..\..\src\macros.py"
+				>
+			</File>
+			<File
+				RelativePath="..\..\src\math.js"
+				>
+			</File>
+			<File
+				RelativePath="..\..\src\messages.js"
+				>
+			</File>
+			<File
+				RelativePath="..\..\src\mirror-delay.js"
+				>
+			</File>
+			<File
+				RelativePath="..\..\src\regexp-delay.js"
+				>
+			</File>
+			<File
+				RelativePath="..\..\src\json-delay.js"
+				>
+			</File>
+			<File
+				RelativePath="..\..\src\runtime.js"
+				>
+			</File>
+			<File
+				RelativePath="..\..\src\string.js"
+				>
+			</File>
+			<File
+				RelativePath="..\..\src\uri.js"
+				>
+			</File>
+			<File
+				RelativePath="..\..\src\v8natives.js"
+				>
+				<FileConfiguration
+					Name="Debug|x64"
+					>
+					<Tool
+						Name="VCCustomBuildTool"
+						Description="Processing js files..."
+						CommandLine=".\js2c.cmd ..\..\src &quot;$(IntDir)\DerivedSources&quot;"
+						AdditionalDependencies="..\..\src\macros.py;..\..\src\runtime.js;..\..\src\v8natives.js;..\..\src\array.js;..\..\src\string.js;..\..\src\uri.js;..\..\src\math.js;..\..\src\messages.js;..\..\src\apinatives.js;..\..\src\debug-delay.js;..\..\src\mirror-delay.js;..\..\src\date-delay.js;..\..\src\regexp-delay.js;..\..\src\json-delay.js"
+						Outputs="$(IntDir)\DerivedSources\natives.cc;$(IntDir)\DerivedSources\natives-empty.cc"
+					/>
+				</FileConfiguration>
+				<FileConfiguration
+					Name="Release|x64"
+					>
+					<Tool
+						Name="VCCustomBuildTool"
+						Description="Processing js files..."
+						CommandLine=".\js2c.cmd ..\..\src &quot;$(IntDir)\DerivedSources&quot;"
+						AdditionalDependencies="..\..\src\macros.py;..\..\src\runtime.js;..\..\src\v8natives.js;..\..\src\array.js;..\..\src\string.js;..\..\src\uri.js;..\..\src\math.js;..\..\src\messages.js;..\..\src\apinatives.js;..\..\src\debug-delay.js;..\..\src\mirror-delay.js;..\..\src\date-delay.js;..\..\src\regexp-delay.js;..\..\src\json-delay.js"
+						Outputs="$(IntDir)\DerivedSources\natives.cc;$(IntDir)\DerivedSources\natives-empty.cc"
+					/>
+				</FileConfiguration>
+			</File>
+		</Filter>
+		<Filter
+			Name="generated files"
+			>
+			<File
+				RelativePath="$(IntDir)\DerivedSources\natives.cc"
+				>
+			</File>
+		</Filter>
+		<File
+			RelativePath="..\..\src\snapshot-empty.cc"
+			>
+		</File>
+	</Files>
+	<Globals>
+	</Globals>
+</VisualStudioProject>
diff --git a/deps/v8/tools/visual_studio/x64.vsprops b/deps/v8/tools/visual_studio/x64.vsprops
new file mode 100644
index 0000000000..af0e47c4b6
--- /dev/null
+++ b/deps/v8/tools/visual_studio/x64.vsprops
@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="Windows-1252"?>
+<VisualStudioPropertySheet
+	ProjectType="Visual C++"
+	Version="8.00"
+	Name="x64"
+	>
+	<Tool
+		Name="VCCLCompilerTool"
+		PreprocessorDefinitions="V8_TARGET_ARCH_X64;V8_NATIVE_REGEXP"
+	/>
+</VisualStudioPropertySheet>