Upgrade V8 to 3.4.12.1

128 files changed, 2317 insertions, 3190 deletions

diff --git a/deps/v8/src/SConscript b/deps/v8/src/SConscript
index 4b0ba16341..6b3059aea6 100755
--- a/deps/v8/src/SConscript
+++ b/deps/v8/src/SConscript
@@ -231,15 +231,11 @@ SOURCES = {
 PREPARSER_SOURCES = {
   'all': Split("""
     allocation.cc
-    bignum.cc
-    cached-powers.cc
-    conversions.cc
     hashmap.cc
     preparse-data.cc
     preparser.cc
     preparser-api.cc
     scanner-base.cc
-    strtod.cc
     token.cc
     unicode.cc
     utils.cc
@@ -317,10 +313,7 @@ def ConfigureObjectFiles():
   env.Replace(**context.flags['v8'])
   context.ApplyEnvOverrides(env)
   env['BUILDERS']['JS2C'] = Builder(action=js2c.JS2C)
-  if 'ENABLE_LOGGING_AND_PROFILING' in env['CPPDEFINES']:
-    env['BUILDERS']['Snapshot'] = Builder(action='$SOURCE $TARGET --logfile "$LOGFILE" --log-snapshot-positions')
-  else:
-    env['BUILDERS']['Snapshot'] = Builder(action='$SOURCE $TARGET')
+  env['BUILDERS']['Snapshot'] = Builder(action='$SOURCE $TARGET --logfile "$LOGFILE" --log-snapshot-positions')
 
   def BuildJS2CEnv(type):
     js2c_env = { 'TYPE': type, 'COMPRESSION': 'off' }
diff --git a/deps/v8/src/api.cc b/deps/v8/src/api.cc
index 71a715c1bb..dc1f90c0e2 100644
--- a/deps/v8/src/api.cc
+++ b/deps/v8/src/api.cc
@@ -54,16 +54,11 @@
 
 #define LOG_API(isolate, expr) LOG(isolate, ApiEntryCall(expr))
 
-#ifdef ENABLE_VMSTATE_TRACKING
 #define ENTER_V8(isolate)                                        \
   ASSERT((isolate)->IsInitialized());                           \
   i::VMState __state__((isolate), i::OTHER)
 #define LEAVE_V8(isolate) \
   i::VMState __state__((isolate), i::EXTERNAL)
-#else
-#define ENTER_V8(isolate) ((void) 0)
-#define LEAVE_V8(isolate) ((void) 0)
-#endif
 
 namespace v8 {
 
@@ -114,9 +109,7 @@ namespace v8 {
 
 static void DefaultFatalErrorHandler(const char* location,
                                      const char* message) {
-#ifdef ENABLE_VMSTATE_TRACKING
   i::VMState __state__(i::Isolate::Current(), i::OTHER);
-#endif
   API_Fatal(location, message);
 }
 
@@ -4832,37 +4825,20 @@ void V8::RemoveMemoryAllocationCallback(MemoryAllocationCallback callback) {
 
 
 void V8::PauseProfiler() {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   i::Isolate* isolate = i::Isolate::Current();
   isolate->logger()->PauseProfiler();
-#endif
 }
 
 
 void V8::ResumeProfiler() {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   i::Isolate* isolate = i::Isolate::Current();
   isolate->logger()->ResumeProfiler();
-#endif
 }
 
 
 bool V8::IsProfilerPaused() {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   i::Isolate* isolate = i::Isolate::Current();
   return isolate->logger()->IsProfilerPaused();
-#else
-  return true;
-#endif
-}
-
-
-int V8::GetLogLines(int from_pos, char* dest_buf, int max_size) {
-#ifdef ENABLE_LOGGING_AND_PROFILING
-  ASSERT(max_size >= kMinimumSizeForLogLinesBuffer);
-  return LOGGER->GetLogLines(from_pos, dest_buf, max_size);
-#endif
-  return 0;
 }
 
 
@@ -5327,7 +5303,6 @@ Local<Context> Debug::GetDebugContext() {
 
 
 Handle<String> CpuProfileNode::GetFunctionName() const {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   i::Isolate* isolate = i::Isolate::Current();
   IsDeadCheck(isolate, "v8::CpuProfileNode::GetFunctionName");
   const i::ProfileNode* node = reinterpret_cast<const i::ProfileNode*>(this);
@@ -5340,117 +5315,77 @@ Handle<String> CpuProfileNode::GetFunctionName() const {
         isolate->factory()->LookupAsciiSymbol(entry->name_prefix()),
         isolate->factory()->LookupAsciiSymbol(entry->name()))));
   }
-#else
-  return v8::String::Empty();
-#endif
 }
 
 
 Handle<String> CpuProfileNode::GetScriptResourceName() const {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   i::Isolate* isolate = i::Isolate::Current();
   IsDeadCheck(isolate, "v8::CpuProfileNode::GetScriptResourceName");
   const i::ProfileNode* node = reinterpret_cast<const i::ProfileNode*>(this);
   return Handle<String>(ToApi<String>(isolate->factory()->LookupAsciiSymbol(
       node->entry()->resource_name())));
-#else
-  return v8::String::Empty();
-#endif
 }
 
 
 int CpuProfileNode::GetLineNumber() const {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   i::Isolate* isolate = i::Isolate::Current();
   IsDeadCheck(isolate, "v8::CpuProfileNode::GetLineNumber");
   return reinterpret_cast<const i::ProfileNode*>(this)->entry()->line_number();
-#else
-  return 0;
-#endif
 }
 
 
 double CpuProfileNode::GetTotalTime() const {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   i::Isolate* isolate = i::Isolate::Current();
   IsDeadCheck(isolate, "v8::CpuProfileNode::GetTotalTime");
   return reinterpret_cast<const i::ProfileNode*>(this)->GetTotalMillis();
-#else
-  return 0.0;
-#endif
 }
 
 
 double CpuProfileNode::GetSelfTime() const {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   i::Isolate* isolate = i::Isolate::Current();
   IsDeadCheck(isolate, "v8::CpuProfileNode::GetSelfTime");
   return reinterpret_cast<const i::ProfileNode*>(this)->GetSelfMillis();
-#else
-  return 0.0;
-#endif
 }
 
 
 double CpuProfileNode::GetTotalSamplesCount() const {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   i::Isolate* isolate = i::Isolate::Current();
   IsDeadCheck(isolate, "v8::CpuProfileNode::GetTotalSamplesCount");
   return reinterpret_cast<const i::ProfileNode*>(this)->total_ticks();
-#else
-  return 0.0;
-#endif
 }
 
 
 double CpuProfileNode::GetSelfSamplesCount() const {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   i::Isolate* isolate = i::Isolate::Current();
   IsDeadCheck(isolate, "v8::CpuProfileNode::GetSelfSamplesCount");
   return reinterpret_cast<const i::ProfileNode*>(this)->self_ticks();
-#else
-  return 0.0;
-#endif
 }
 
 
 unsigned CpuProfileNode::GetCallUid() const {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   i::Isolate* isolate = i::Isolate::Current();
   IsDeadCheck(isolate, "v8::CpuProfileNode::GetCallUid");
   return reinterpret_cast<const i::ProfileNode*>(this)->entry()->GetCallUid();
-#else
-  return 0;
-#endif
 }
 
 
 int CpuProfileNode::GetChildrenCount() const {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   i::Isolate* isolate = i::Isolate::Current();
   IsDeadCheck(isolate, "v8::CpuProfileNode::GetChildrenCount");
   return reinterpret_cast<const i::ProfileNode*>(this)->children()->length();
-#else
-  return 0;
-#endif
 }
 
 
 const CpuProfileNode* CpuProfileNode::GetChild(int index) const {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   i::Isolate* isolate = i::Isolate::Current();
   IsDeadCheck(isolate, "v8::CpuProfileNode::GetChild");
   const i::ProfileNode* child =
       reinterpret_cast<const i::ProfileNode*>(this)->children()->at(index);
   return reinterpret_cast<const CpuProfileNode*>(child);
-#else
-  return NULL;
-#endif
 }
 
 
 void CpuProfile::Delete() {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   i::Isolate* isolate = i::Isolate::Current();
   IsDeadCheck(isolate, "v8::CpuProfile::Delete");
   i::CpuProfiler::DeleteProfile(reinterpret_cast<i::CpuProfile*>(this));
@@ -5459,153 +5394,109 @@ void CpuProfile::Delete() {
     // If this was the last profile, clean up all accessory data as well.
     i::CpuProfiler::DeleteAllProfiles();
   }
-#endif
 }
 
 
 unsigned CpuProfile::GetUid() const {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   i::Isolate* isolate = i::Isolate::Current();
   IsDeadCheck(isolate, "v8::CpuProfile::GetUid");
   return reinterpret_cast<const i::CpuProfile*>(this)->uid();
-#else
-  return 0;
-#endif
 }
 
 
 Handle<String> CpuProfile::GetTitle() const {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   i::Isolate* isolate = i::Isolate::Current();
   IsDeadCheck(isolate, "v8::CpuProfile::GetTitle");
   const i::CpuProfile* profile = reinterpret_cast<const i::CpuProfile*>(this);
   return Handle<String>(ToApi<String>(isolate->factory()->LookupAsciiSymbol(
       profile->title())));
-#else
-  return v8::String::Empty();
-#endif
 }
 
 
 const CpuProfileNode* CpuProfile::GetBottomUpRoot() const {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   i::Isolate* isolate = i::Isolate::Current();
   IsDeadCheck(isolate, "v8::CpuProfile::GetBottomUpRoot");
   const i::CpuProfile* profile = reinterpret_cast<const i::CpuProfile*>(this);
   return reinterpret_cast<const CpuProfileNode*>(profile->bottom_up()->root());
-#else
-  return NULL;
-#endif
 }
 
 
 const CpuProfileNode* CpuProfile::GetTopDownRoot() const {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   i::Isolate* isolate = i::Isolate::Current();
   IsDeadCheck(isolate, "v8::CpuProfile::GetTopDownRoot");
   const i::CpuProfile* profile = reinterpret_cast<const i::CpuProfile*>(this);
   return reinterpret_cast<const CpuProfileNode*>(profile->top_down()->root());
-#else
-  return NULL;
-#endif
 }
 
 
 int CpuProfiler::GetProfilesCount() {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   i::Isolate* isolate = i::Isolate::Current();
   IsDeadCheck(isolate, "v8::CpuProfiler::GetProfilesCount");
   return i::CpuProfiler::GetProfilesCount();
-#else
-  return 0;
-#endif
 }
 
 
 const CpuProfile* CpuProfiler::GetProfile(int index,
                                           Handle<Value> security_token) {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   i::Isolate* isolate = i::Isolate::Current();
   IsDeadCheck(isolate, "v8::CpuProfiler::GetProfile");
   return reinterpret_cast<const CpuProfile*>(
       i::CpuProfiler::GetProfile(
           security_token.IsEmpty() ? NULL : *Utils::OpenHandle(*security_token),
           index));
-#else
-  return NULL;
-#endif
 }
 
 
 const CpuProfile* CpuProfiler::FindProfile(unsigned uid,
                                            Handle<Value> security_token) {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   i::Isolate* isolate = i::Isolate::Current();
   IsDeadCheck(isolate, "v8::CpuProfiler::FindProfile");
   return reinterpret_cast<const CpuProfile*>(
       i::CpuProfiler::FindProfile(
           security_token.IsEmpty() ? NULL : *Utils::OpenHandle(*security_token),
           uid));
-#else
-  return NULL;
-#endif
 }
 
 
 void CpuProfiler::StartProfiling(Handle<String> title) {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   i::Isolate* isolate = i::Isolate::Current();
   IsDeadCheck(isolate, "v8::CpuProfiler::StartProfiling");
   i::CpuProfiler::StartProfiling(*Utils::OpenHandle(*title));
-#endif
 }
 
 
 const CpuProfile* CpuProfiler::StopProfiling(Handle<String> title,
                                              Handle<Value> security_token) {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   i::Isolate* isolate = i::Isolate::Current();
   IsDeadCheck(isolate, "v8::CpuProfiler::StopProfiling");
   return reinterpret_cast<const CpuProfile*>(
       i::CpuProfiler::StopProfiling(
           security_token.IsEmpty() ? NULL : *Utils::OpenHandle(*security_token),
           *Utils::OpenHandle(*title)));
-#else
-  return NULL;
-#endif
 }
 
 
 void CpuProfiler::DeleteAllProfiles() {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   i::Isolate* isolate = i::Isolate::Current();
   IsDeadCheck(isolate, "v8::CpuProfiler::DeleteAllProfiles");
   i::CpuProfiler::DeleteAllProfiles();
-#endif
 }
 
 
-#ifdef ENABLE_LOGGING_AND_PROFILING
 static i::HeapGraphEdge* ToInternal(const HeapGraphEdge* edge) {
   return const_cast<i::HeapGraphEdge*>(
       reinterpret_cast<const i::HeapGraphEdge*>(edge));
 }
-#endif
 
 
 HeapGraphEdge::Type HeapGraphEdge::GetType() const {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   i::Isolate* isolate = i::Isolate::Current();
   IsDeadCheck(isolate, "v8::HeapGraphEdge::GetType");
   return static_cast<HeapGraphEdge::Type>(ToInternal(this)->type());
-#else
-  return static_cast<HeapGraphEdge::Type>(0);
-#endif
 }
 
 
 Handle<Value> HeapGraphEdge::GetName() const {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   i::Isolate* isolate = i::Isolate::Current();
   IsDeadCheck(isolate, "v8::HeapGraphEdge::GetName");
   i::HeapGraphEdge* edge = ToInternal(this);
@@ -5622,166 +5513,112 @@ Handle<Value> HeapGraphEdge::GetName() const {
           edge->index())));
     default: UNREACHABLE();
   }
-#endif
   return v8::Undefined();
 }
 
 
 const HeapGraphNode* HeapGraphEdge::GetFromNode() const {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   i::Isolate* isolate = i::Isolate::Current();
   IsDeadCheck(isolate, "v8::HeapGraphEdge::GetFromNode");
   const i::HeapEntry* from = ToInternal(this)->From();
   return reinterpret_cast<const HeapGraphNode*>(from);
-#else
-  return NULL;
-#endif
 }
 
 
 const HeapGraphNode* HeapGraphEdge::GetToNode() const {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   i::Isolate* isolate = i::Isolate::Current();
   IsDeadCheck(isolate, "v8::HeapGraphEdge::GetToNode");
   const i::HeapEntry* to = ToInternal(this)->to();
   return reinterpret_cast<const HeapGraphNode*>(to);
-#else
-  return NULL;
-#endif
 }
 
 
-#ifdef ENABLE_LOGGING_AND_PROFILING
 static i::HeapEntry* ToInternal(const HeapGraphNode* entry) {
   return const_cast<i::HeapEntry*>(
       reinterpret_cast<const i::HeapEntry*>(entry));
 }
-#endif
 
 
 HeapGraphNode::Type HeapGraphNode::GetType() const {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   i::Isolate* isolate = i::Isolate::Current();
   IsDeadCheck(isolate, "v8::HeapGraphNode::GetType");
   return static_cast<HeapGraphNode::Type>(ToInternal(this)->type());
-#else
-  return static_cast<HeapGraphNode::Type>(0);
-#endif
 }
 
 
 Handle<String> HeapGraphNode::GetName() const {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   i::Isolate* isolate = i::Isolate::Current();
   IsDeadCheck(isolate, "v8::HeapGraphNode::GetName");
   return Handle<String>(ToApi<String>(isolate->factory()->LookupAsciiSymbol(
       ToInternal(this)->name())));
-#else
-  return v8::String::Empty();
-#endif
 }
 
 
 uint64_t HeapGraphNode::GetId() const {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   i::Isolate* isolate = i::Isolate::Current();
   IsDeadCheck(isolate, "v8::HeapGraphNode::GetId");
   return ToInternal(this)->id();
-#else
-  return 0;
-#endif
 }
 
 
 int HeapGraphNode::GetSelfSize() const {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   i::Isolate* isolate = i::Isolate::Current();
   IsDeadCheck(isolate, "v8::HeapGraphNode::GetSelfSize");
   return ToInternal(this)->self_size();
-#else
-  return 0;
-#endif
 }
 
 
 int HeapGraphNode::GetRetainedSize(bool exact) const {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   i::Isolate* isolate = i::Isolate::Current();
   IsDeadCheck(isolate, "v8::HeapSnapshot::GetRetainedSize");
   return ToInternal(this)->RetainedSize(exact);
-#else
-  return 0;
-#endif
 }
 
 
 int HeapGraphNode::GetChildrenCount() const {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   i::Isolate* isolate = i::Isolate::Current();
   IsDeadCheck(isolate, "v8::HeapSnapshot::GetChildrenCount");
   return ToInternal(this)->children().length();
-#else
-  return 0;
-#endif
 }
 
 
 const HeapGraphEdge* HeapGraphNode::GetChild(int index) const {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   i::Isolate* isolate = i::Isolate::Current();
   IsDeadCheck(isolate, "v8::HeapSnapshot::GetChild");
   return reinterpret_cast<const HeapGraphEdge*>(
       &ToInternal(this)->children()[index]);
-#else
-  return NULL;
-#endif
 }
 
 
 int HeapGraphNode::GetRetainersCount() const {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   i::Isolate* isolate = i::Isolate::Current();
   IsDeadCheck(isolate, "v8::HeapSnapshot::GetRetainersCount");
   return ToInternal(this)->retainers().length();
-#else
-  return 0;
-#endif
 }
 
 
 const HeapGraphEdge* HeapGraphNode::GetRetainer(int index) const {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   i::Isolate* isolate = i::Isolate::Current();
   IsDeadCheck(isolate, "v8::HeapSnapshot::GetRetainer");
   return reinterpret_cast<const HeapGraphEdge*>(
       ToInternal(this)->retainers()[index]);
-#else
-  return NULL;
-#endif
 }
 
 
 const HeapGraphNode* HeapGraphNode::GetDominatorNode() const {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   i::Isolate* isolate = i::Isolate::Current();
   IsDeadCheck(isolate, "v8::HeapSnapshot::GetDominatorNode");
   return reinterpret_cast<const HeapGraphNode*>(ToInternal(this)->dominator());
-#else
-  return NULL;
-#endif
 }
 
 
-#ifdef ENABLE_LOGGING_AND_PROFILING
 static i::HeapSnapshot* ToInternal(const HeapSnapshot* snapshot) {
   return const_cast<i::HeapSnapshot*>(
       reinterpret_cast<const i::HeapSnapshot*>(snapshot));
 }
-#endif
 
 
 void HeapSnapshot::Delete() {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   i::Isolate* isolate = i::Isolate::Current();
   IsDeadCheck(isolate, "v8::HeapSnapshot::Delete");
   if (i::HeapProfiler::GetSnapshotsCount() > 1) {
@@ -5790,93 +5627,63 @@ void HeapSnapshot::Delete() {
     // If this is the last snapshot, clean up all accessory data as well.
     i::HeapProfiler::DeleteAllSnapshots();
   }
-#endif
 }
 
 
 HeapSnapshot::Type HeapSnapshot::GetType() const {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   i::Isolate* isolate = i::Isolate::Current();
   IsDeadCheck(isolate, "v8::HeapSnapshot::GetType");
   return static_cast<HeapSnapshot::Type>(ToInternal(this)->type());
-#else
-  return static_cast<HeapSnapshot::Type>(0);
-#endif
 }
 
 
 unsigned HeapSnapshot::GetUid() const {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   i::Isolate* isolate = i::Isolate::Current();
   IsDeadCheck(isolate, "v8::HeapSnapshot::GetUid");
   return ToInternal(this)->uid();
-#else
-  return 0;
-#endif
 }
 
 
 Handle<String> HeapSnapshot::GetTitle() const {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   i::Isolate* isolate = i::Isolate::Current();
   IsDeadCheck(isolate, "v8::HeapSnapshot::GetTitle");
   return Handle<String>(ToApi<String>(isolate->factory()->LookupAsciiSymbol(
       ToInternal(this)->title())));
-#else
-  return v8::String::Empty();
-#endif
 }
 
 
 const HeapGraphNode* HeapSnapshot::GetRoot() const {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   i::Isolate* isolate = i::Isolate::Current();
   IsDeadCheck(isolate, "v8::HeapSnapshot::GetHead");
   return reinterpret_cast<const HeapGraphNode*>(ToInternal(this)->root());
-#else
-  return 0;
-#endif
 }
 
 
 const HeapGraphNode* HeapSnapshot::GetNodeById(uint64_t id) const {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   i::Isolate* isolate = i::Isolate::Current();
   IsDeadCheck(isolate, "v8::HeapSnapshot::GetNodeById");
   return reinterpret_cast<const HeapGraphNode*>(
       ToInternal(this)->GetEntryById(id));
-#else
-  return NULL;
-#endif
 }
 
 
 int HeapSnapshot::GetNodesCount() const {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   i::Isolate* isolate = i::Isolate::Current();
   IsDeadCheck(isolate, "v8::HeapSnapshot::GetNodesCount");
   return ToInternal(this)->entries()->length();
-#else
-  return 0;
-#endif
 }
 
 
 const HeapGraphNode* HeapSnapshot::GetNode(int index) const {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   i::Isolate* isolate = i::Isolate::Current();
   IsDeadCheck(isolate, "v8::HeapSnapshot::GetNode");
   return reinterpret_cast<const HeapGraphNode*>(
       ToInternal(this)->entries()->at(index));
-#else
-  return 0;
-#endif
 }
 
 
 void HeapSnapshot::Serialize(OutputStream* stream,
                              HeapSnapshot::SerializationFormat format) const {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   i::Isolate* isolate = i::Isolate::Current();
   IsDeadCheck(isolate, "v8::HeapSnapshot::Serialize");
   ApiCheck(format == kJSON,
@@ -5890,49 +5697,35 @@ void HeapSnapshot::Serialize(OutputStream* stream,
            "Invalid stream chunk size");
   i::HeapSnapshotJSONSerializer serializer(ToInternal(this));
   serializer.Serialize(stream);
-#endif
 }
 
 
 int HeapProfiler::GetSnapshotsCount() {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   i::Isolate* isolate = i::Isolate::Current();
   IsDeadCheck(isolate, "v8::HeapProfiler::GetSnapshotsCount");
   return i::HeapProfiler::GetSnapshotsCount();
-#else
-  return 0;
-#endif
 }
 
 
 const HeapSnapshot* HeapProfiler::GetSnapshot(int index) {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   i::Isolate* isolate = i::Isolate::Current();
   IsDeadCheck(isolate, "v8::HeapProfiler::GetSnapshot");
   return reinterpret_cast<const HeapSnapshot*>(
       i::HeapProfiler::GetSnapshot(index));
-#else
-  return NULL;
-#endif
 }
 
 
 const HeapSnapshot* HeapProfiler::FindSnapshot(unsigned uid) {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   i::Isolate* isolate = i::Isolate::Current();
   IsDeadCheck(isolate, "v8::HeapProfiler::FindSnapshot");
   return reinterpret_cast<const HeapSnapshot*>(
       i::HeapProfiler::FindSnapshot(uid));
-#else
-  return NULL;
-#endif
 }
 
 
 const HeapSnapshot* HeapProfiler::TakeSnapshot(Handle<String> title,
                                                HeapSnapshot::Type type,
                                                ActivityControl* control) {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   i::Isolate* isolate = i::Isolate::Current();
   IsDeadCheck(isolate, "v8::HeapProfiler::TakeSnapshot");
   i::HeapSnapshot::Type internal_type = i::HeapSnapshot::kFull;
@@ -5946,27 +5739,20 @@ const HeapSnapshot* HeapProfiler::TakeSnapshot(Handle<String> title,
   return reinterpret_cast<const HeapSnapshot*>(
       i::HeapProfiler::TakeSnapshot(
           *Utils::OpenHandle(*title), internal_type, control));
-#else
-  return NULL;
-#endif
 }
 
 
 void HeapProfiler::DeleteAllSnapshots() {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   i::Isolate* isolate = i::Isolate::Current();
   IsDeadCheck(isolate, "v8::HeapProfiler::DeleteAllSnapshots");
   i::HeapProfiler::DeleteAllSnapshots();
-#endif
 }
 
 
 void HeapProfiler::DefineWrapperClass(uint16_t class_id,
                                       WrapperInfoCallback callback) {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   i::Isolate::Current()->heap_profiler()->DefineWrapperClass(class_id,
                                                              callback);
-#endif
 }
 
 
diff --git a/deps/v8/src/arm/code-stubs-arm.cc b/deps/v8/src/arm/code-stubs-arm.cc
index 94572c92e9..ab7c6f247a 100644
--- a/deps/v8/src/arm/code-stubs-arm.cc
+++ b/deps/v8/src/arm/code-stubs-arm.cc
@@ -304,12 +304,6 @@ class ConvertToDoubleStub : public CodeStub {
   }
 
   void Generate(MacroAssembler* masm);
-
-  const char* GetName() { return "ConvertToDoubleStub"; }
-
-#ifdef DEBUG
-  void Print() { PrintF("ConvertToDoubleStub\n"); }
-#endif
 };
 
 
@@ -1689,25 +1683,17 @@ void ToBooleanStub::Generate(MacroAssembler* masm) {
 }
 
 
-const char* UnaryOpStub::GetName() {
-  if (name_ != NULL) return name_;
-  const int kMaxNameLength = 100;
-  name_ = Isolate::Current()->bootstrapper()->AllocateAutoDeletedArray(
-      kMaxNameLength);
-  if (name_ == NULL) return "OOM";
+void UnaryOpStub::PrintName(StringStream* stream) {
   const char* op_name = Token::Name(op_);
   const char* overwrite_name = NULL;  // Make g++ happy.
   switch (mode_) {
     case UNARY_NO_OVERWRITE: overwrite_name = "Alloc"; break;
     case UNARY_OVERWRITE: overwrite_name = "Overwrite"; break;
   }
-
-  OS::SNPrintF(Vector<char>(name_, kMaxNameLength),
-               "UnaryOpStub_%s_%s_%s",
-               op_name,
-               overwrite_name,
-               UnaryOpIC::GetName(operand_type_));
-  return name_;
+  stream->Add("UnaryOpStub_%s_%s_%s",
+              op_name,
+              overwrite_name,
+              UnaryOpIC::GetName(operand_type_));
 }
 
 
@@ -2043,12 +2029,7 @@ void BinaryOpStub::Generate(MacroAssembler* masm) {
 }
 
 
-const char* BinaryOpStub::GetName() {
-  if (name_ != NULL) return name_;
-  const int kMaxNameLength = 100;
-  name_ = Isolate::Current()->bootstrapper()->AllocateAutoDeletedArray(
-      kMaxNameLength);
-  if (name_ == NULL) return "OOM";
+void BinaryOpStub::PrintName(StringStream* stream) {
   const char* op_name = Token::Name(op_);
   const char* overwrite_name;
   switch (mode_) {
@@ -2057,13 +2038,10 @@ const char* BinaryOpStub::GetName() {
     case OVERWRITE_LEFT: overwrite_name = "OverwriteLeft"; break;
     default: overwrite_name = "UnknownOverwrite"; break;
   }
-
-  OS::SNPrintF(Vector<char>(name_, kMaxNameLength),
-               "BinaryOpStub_%s_%s_%s",
-               op_name,
-               overwrite_name,
-               BinaryOpIC::GetName(operands_type_));
-  return name_;
+  stream->Add("BinaryOpStub_%s_%s_%s",
+              op_name,
+              overwrite_name,
+              BinaryOpIC::GetName(operands_type_));
 }
 
 
@@ -3568,7 +3546,6 @@ void JSEntryStub::GenerateBody(MacroAssembler* masm, bool is_construct) {
   // Setup frame pointer for the frame to be pushed.
   __ add(fp, sp, Operand(-EntryFrameConstants::kCallerFPOffset));
 
-#ifdef ENABLE_LOGGING_AND_PROFILING
   // If this is the outermost JS call, set js_entry_sp value.
   Label non_outermost_js;
   ExternalReference js_entry_sp(Isolate::k_js_entry_sp_address, isolate);
@@ -3584,7 +3561,6 @@ void JSEntryStub::GenerateBody(MacroAssembler* masm, bool is_construct) {
   __ mov(ip, Operand(Smi::FromInt(StackFrame::INNER_JSENTRY_FRAME)));
   __ bind(&cont);
   __ push(ip);
-#endif
 
   // Call a faked try-block that does the invoke.
   __ bl(&invoke);
@@ -3645,7 +3621,6 @@ void JSEntryStub::GenerateBody(MacroAssembler* masm, bool is_construct) {
   __ PopTryHandler();
 
   __ bind(&exit);  // r0 holds result
-#ifdef ENABLE_LOGGING_AND_PROFILING
   // Check if the current stack frame is marked as the outermost JS frame.
   Label non_outermost_js_2;
   __ pop(r5);
@@ -3655,7 +3630,6 @@ void JSEntryStub::GenerateBody(MacroAssembler* masm, bool is_construct) {
   __ mov(r5, Operand(ExternalReference(js_entry_sp)));
   __ str(r6, MemOperand(r5));
   __ bind(&non_outermost_js_2);
-#endif
 
   // Restore the top frame descriptors from the stack.
   __ pop(r3);
@@ -4755,16 +4729,9 @@ void CallFunctionStub::Generate(MacroAssembler* masm) {
 
 // Unfortunately you have to run without snapshots to see most of these
 // names in the profile since most compare stubs end up in the snapshot.
-const char* CompareStub::GetName() {
+void CompareStub::PrintName(StringStream* stream) {
   ASSERT((lhs_.is(r0) && rhs_.is(r1)) ||
          (lhs_.is(r1) && rhs_.is(r0)));
-
-  if (name_ != NULL) return name_;
-  const int kMaxNameLength = 100;
-  name_ = Isolate::Current()->bootstrapper()->AllocateAutoDeletedArray(
-      kMaxNameLength);
-  if (name_ == NULL) return "OOM";
-
   const char* cc_name;
   switch (cc_) {
     case lt: cc_name = "LT"; break;
@@ -4775,40 +4742,14 @@ const char* CompareStub::GetName() {
     case ne: cc_name = "NE"; break;
     default: cc_name = "UnknownCondition"; break;
   }
-
-  const char* lhs_name = lhs_.is(r0) ? "_r0" : "_r1";
-  const char* rhs_name = rhs_.is(r0) ? "_r0" : "_r1";
-
-  const char* strict_name = "";
-  if (strict_ && (cc_ == eq || cc_ == ne)) {
-    strict_name = "_STRICT";
-  }
-
-  const char* never_nan_nan_name = "";
-  if (never_nan_nan_ && (cc_ == eq || cc_ == ne)) {
-    never_nan_nan_name = "_NO_NAN";
-  }
-
-  const char* include_number_compare_name = "";
-  if (!include_number_compare_) {
-    include_number_compare_name = "_NO_NUMBER";
-  }
-
-  const char* include_smi_compare_name = "";
-  if (!include_smi_compare_) {
-    include_smi_compare_name = "_NO_SMI";
-  }
-
-  OS::SNPrintF(Vector<char>(name_, kMaxNameLength),
-               "CompareStub_%s%s%s%s%s%s",
-               cc_name,
-               lhs_name,
-               rhs_name,
-               strict_name,
-               never_nan_nan_name,
-               include_number_compare_name,
-               include_smi_compare_name);
-  return name_;
+  bool is_equality = cc_ == eq || cc_ == ne;
+  stream->Add("CompareStub_%s", cc_name);
+  stream->Add(lhs_.is(r0) ? "_r0" : "_r1");
+  stream->Add(rhs_.is(r0) ? "_r0" : "_r1");
+  if (strict_ && is_equality) stream->Add("_STRICT");
+  if (never_nan_nan_ && is_equality) stream->Add("_NO_NAN");
+  if (!include_number_compare_) stream->Add("_NO_NUMBER");
+  if (!include_smi_compare_) stream->Add("_NO_SMI");
 }
 
 
diff --git a/deps/v8/src/arm/code-stubs-arm.h b/deps/v8/src/arm/code-stubs-arm.h
index 7427351308..557f7e6d41 100644
--- a/deps/v8/src/arm/code-stubs-arm.h
+++ b/deps/v8/src/arm/code-stubs-arm.h
@@ -65,8 +65,7 @@ class UnaryOpStub: public CodeStub {
               UnaryOpIC::TypeInfo operand_type = UnaryOpIC::UNINITIALIZED)
       : op_(op),
         mode_(mode),
-        operand_type_(operand_type),
-        name_(NULL) {
+        operand_type_(operand_type) {
   }
 
  private:
@@ -76,19 +75,7 @@ class UnaryOpStub: public CodeStub {
   // Operand type information determined at runtime.
   UnaryOpIC::TypeInfo operand_type_;
 
-  char* name_;
-
-  const char* GetName();
-
-#ifdef DEBUG
-  void Print() {
-    PrintF("UnaryOpStub %d (op %s), (mode %d, runtime_type_info %s)\n",
-           MinorKey(),
-           Token::String(op_),
-           static_cast<int>(mode_),
-           UnaryOpIC::GetName(operand_type_));
-  }
-#endif
+  virtual void PrintName(StringStream* stream);
 
   class ModeBits: public BitField<UnaryOverwriteMode, 0, 1> {};
   class OpBits: public BitField<Token::Value, 1, 7> {};
@@ -142,8 +129,7 @@ class BinaryOpStub: public CodeStub {
       : op_(op),
         mode_(mode),
         operands_type_(BinaryOpIC::UNINITIALIZED),
-        result_type_(BinaryOpIC::UNINITIALIZED),
-        name_(NULL) {
+        result_type_(BinaryOpIC::UNINITIALIZED) {
     use_vfp3_ = CpuFeatures::IsSupported(VFP3);
     ASSERT(OpBits::is_valid(Token::NUM_TOKENS));
   }
@@ -156,8 +142,7 @@ class BinaryOpStub: public CodeStub {
         mode_(ModeBits::decode(key)),
         use_vfp3_(VFP3Bits::decode(key)),
         operands_type_(operands_type),
-        result_type_(result_type),
-        name_(NULL) { }
+        result_type_(result_type) { }
 
  private:
   enum SmiCodeGenerateHeapNumberResults {
@@ -173,20 +158,7 @@ class BinaryOpStub: public CodeStub {
   BinaryOpIC::TypeInfo operands_type_;
   BinaryOpIC::TypeInfo result_type_;
 
-  char* name_;
-
-  const char* GetName();
-
-#ifdef DEBUG
-  void Print() {
-    PrintF("BinaryOpStub %d (op %s), "
-           "(mode %d, runtime_type_info %s)\n",
-           MinorKey(),
-           Token::String(op_),
-           static_cast<int>(mode_),
-           BinaryOpIC::GetName(operands_type_));
-  }
-#endif
+  virtual void PrintName(StringStream* stream);
 
   // Minor key encoding in 16 bits RRRTTTVOOOOOOOMM.
   class ModeBits: public BitField<OverwriteMode, 0, 2> {};
@@ -370,12 +342,6 @@ class WriteInt32ToHeapNumberStub : public CodeStub {
   }
 
   void Generate(MacroAssembler* masm);
-
-  const char* GetName() { return "WriteInt32ToHeapNumberStub"; }
-
-#ifdef DEBUG
-  void Print() { PrintF("WriteInt32ToHeapNumberStub\n"); }
-#endif
 };
 
 
@@ -402,8 +368,6 @@ class NumberToStringStub: public CodeStub {
   int MinorKey() { return 0; }
 
   void Generate(MacroAssembler* masm);
-
-  const char* GetName() { return "NumberToStringStub"; }
 };
 
 
@@ -421,8 +385,6 @@ class RegExpCEntryStub: public CodeStub {
   int MinorKey() { return 0; }
 
   bool NeedsImmovableCode() { return true; }
-
-  const char* GetName() { return "RegExpCEntryStub"; }
 };
 
 
@@ -443,8 +405,6 @@ class DirectCEntryStub: public CodeStub {
   int MinorKey() { return 0; }
 
   bool NeedsImmovableCode() { return true; }
-
-  const char* GetName() { return "DirectCEntryStub"; }
 };
 
 
@@ -627,13 +587,6 @@ class StringDictionaryLookupStub: public CodeStub {
       StringDictionary::kHeaderSize +
       StringDictionary::kElementsStartIndex * kPointerSize;
 
-
-#ifdef DEBUG
-  void Print() {
-    PrintF("StringDictionaryLookupStub\n");
-  }
-#endif
-
   Major MajorKey() { return StringDictionaryNegativeLookup; }
 
   int MinorKey() {
diff --git a/deps/v8/src/arm/codegen-arm.h b/deps/v8/src/arm/codegen-arm.h
index 01aa8052e1..d27982abac 100644
--- a/deps/v8/src/arm/codegen-arm.h
+++ b/deps/v8/src/arm/codegen-arm.h
@@ -58,9 +58,7 @@ class CodeGenerator: public AstVisitor {
   // Print the code after compiling it.
   static void PrintCode(Handle<Code> code, CompilationInfo* info);
 
-#ifdef ENABLE_LOGGING_AND_PROFILING
   static bool ShouldGenerateLog(Expression* type);
-#endif
 
   static void SetFunctionInfo(Handle<JSFunction> fun,
                               FunctionLiteral* lit,
diff --git a/deps/v8/src/arm/full-codegen-arm.cc b/deps/v8/src/arm/full-codegen-arm.cc
index 4b55915e91..c3440eb3ea 100644
--- a/deps/v8/src/arm/full-codegen-arm.cc
+++ b/deps/v8/src/arm/full-codegen-arm.cc
@@ -776,7 +776,7 @@ void FullCodeGenerator::EmitDeclaration(Variable* variable,
       // IDs for bailouts from optimized code.
       ASSERT(prop->obj()->AsVariableProxy() != NULL);
       { AccumulatorValueContext for_object(this);
-        EmitVariableLoad(prop->obj()->AsVariableProxy()->var());
+        EmitVariableLoad(prop->obj()->AsVariableProxy());
       }
 
       __ push(r0);
@@ -1113,7 +1113,7 @@ void FullCodeGenerator::EmitNewClosure(Handle<SharedFunctionInfo> info,
 
 void FullCodeGenerator::VisitVariableProxy(VariableProxy* expr) {
   Comment cmnt(masm_, "[ VariableProxy");
-  EmitVariableLoad(expr->var());
+  EmitVariableLoad(expr);
 }
 
 
@@ -1262,7 +1262,11 @@ void FullCodeGenerator::EmitDynamicLoadFromSlotFastCase(
 }
 
 
-void FullCodeGenerator::EmitVariableLoad(Variable* var) {
+void FullCodeGenerator::EmitVariableLoad(VariableProxy* proxy) {
+  // Record position before possible IC call.
+  SetSourcePosition(proxy->position());
+  Variable* var = proxy->var();
+
   // Three cases: non-this global variables, lookup slots, and all other
   // types of slots.
   Slot* slot = var->AsSlot();
@@ -1593,7 +1597,7 @@ void FullCodeGenerator::VisitAssignment(Assignment* expr) {
     { AccumulatorValueContext context(this);
       switch (assign_type) {
         case VARIABLE:
-          EmitVariableLoad(expr->target()->AsVariableProxy()->var());
+          EmitVariableLoad(expr->target()->AsVariableProxy());
           PrepareForBailout(expr->target(), TOS_REG);
           break;
         case NAMED_PROPERTY:
@@ -2772,13 +2776,12 @@ void FullCodeGenerator::EmitLog(ZoneList<Expression*>* args) {
   //     with '%2s' (see Logger::LogRuntime for all the formats).
   //   2 (array): Arguments to the format string.
   ASSERT_EQ(args->length(), 3);
-#ifdef ENABLE_LOGGING_AND_PROFILING
   if (CodeGenerator::ShouldGenerateLog(args->at(0))) {
     VisitForStackValue(args->at(1));
     VisitForStackValue(args->at(2));
     __ CallRuntime(Runtime::kLog, 2);
   }
-#endif
+
   // Finally, we're expected to leave a value on the top of the stack.
   __ LoadRoot(r0, Heap::kUndefinedValueRootIndex);
   context()->Plug(r0);
@@ -3816,7 +3819,7 @@ void FullCodeGenerator::VisitCountOperation(CountOperation* expr) {
   if (assign_type == VARIABLE) {
     ASSERT(expr->expression()->AsVariableProxy()->var() != NULL);
     AccumulatorValueContext context(this);
-    EmitVariableLoad(expr->expression()->AsVariableProxy()->var());
+    EmitVariableLoad(expr->expression()->AsVariableProxy());
   } else {
     // Reserve space for result of postfix operation.
     if (expr->is_postfix() && !context()->IsEffect()) {
diff --git a/deps/v8/src/arm/ic-arm.cc b/deps/v8/src/arm/ic-arm.cc
index dea875bad4..6038153a1a 100644
--- a/deps/v8/src/arm/ic-arm.cc
+++ b/deps/v8/src/arm/ic-arm.cc
@@ -212,101 +212,6 @@ static void GenerateDictionaryStore(MacroAssembler* masm,
 }
 
 
-static void GenerateNumberDictionaryLoad(MacroAssembler* masm,
-                                         Label* miss,
-                                         Register elements,
-                                         Register key,
-                                         Register result,
-                                         Register t0,
-                                         Register t1,
-                                         Register t2) {
-  // Register use:
-  //
-  // elements - holds the slow-case elements of the receiver on entry.
-  //            Unchanged unless 'result' is the same register.
-  //
-  // key      - holds the smi key on entry.
-  //            Unchanged unless 'result' is the same register.
-  //
-  // result   - holds the result on exit if the load succeeded.
-  //            Allowed to be the same as 'key' or 'result'.
-  //            Unchanged on bailout so 'key' or 'result' can be used
-  //            in further computation.
-  //
-  // Scratch registers:
-  //
-  // t0 - holds the untagged key on entry and holds the hash once computed.
-  //
-  // t1 - used to hold the capacity mask of the dictionary
-  //
-  // t2 - used for the index into the dictionary.
-  Label done;
-
-  // Compute the hash code from the untagged key.  This must be kept in sync
-  // with ComputeIntegerHash in utils.h.
-  //
-  // hash = ~hash + (hash << 15);
-  __ mvn(t1, Operand(t0));
-  __ add(t0, t1, Operand(t0, LSL, 15));
-  // hash = hash ^ (hash >> 12);
-  __ eor(t0, t0, Operand(t0, LSR, 12));
-  // hash = hash + (hash << 2);
-  __ add(t0, t0, Operand(t0, LSL, 2));
-  // hash = hash ^ (hash >> 4);
-  __ eor(t0, t0, Operand(t0, LSR, 4));
-  // hash = hash * 2057;
-  __ mov(t1, Operand(2057));
-  __ mul(t0, t0, t1);
-  // hash = hash ^ (hash >> 16);
-  __ eor(t0, t0, Operand(t0, LSR, 16));
-
-  // Compute the capacity mask.
-  __ ldr(t1, FieldMemOperand(elements, NumberDictionary::kCapacityOffset));
-  __ mov(t1, Operand(t1, ASR, kSmiTagSize));  // convert smi to int
-  __ sub(t1, t1, Operand(1));
-
-  // Generate an unrolled loop that performs a few probes before giving up.
-  static const int kProbes = 4;
-  for (int i = 0; i < kProbes; i++) {
-    // Use t2 for index calculations and keep the hash intact in t0.
-    __ mov(t2, t0);
-    // Compute the masked index: (hash + i + i * i) & mask.
-    if (i > 0) {
-      __ add(t2, t2, Operand(NumberDictionary::GetProbeOffset(i)));
-    }
-    __ and_(t2, t2, Operand(t1));
-
-    // Scale the index by multiplying by the element size.
-    ASSERT(NumberDictionary::kEntrySize == 3);
-    __ add(t2, t2, Operand(t2, LSL, 1));  // t2 = t2 * 3
-
-    // Check if the key is identical to the name.
-    __ add(t2, elements, Operand(t2, LSL, kPointerSizeLog2));
-    __ ldr(ip, FieldMemOperand(t2, NumberDictionary::kElementsStartOffset));
-    __ cmp(key, Operand(ip));
-    if (i != kProbes - 1) {
-      __ b(eq, &done);
-    } else {
-      __ b(ne, miss);
-    }
-  }
-
-  __ bind(&done);
-  // Check that the value is a normal property.
-  // t2: elements + (index * kPointerSize)
-  const int kDetailsOffset =
-      NumberDictionary::kElementsStartOffset + 2 * kPointerSize;
-  __ ldr(t1, FieldMemOperand(t2, kDetailsOffset));
-  __ tst(t1, Operand(Smi::FromInt(PropertyDetails::TypeField::mask())));
-  __ b(ne, miss);
-
-  // Get the value at the masked, scaled index and return.
-  const int kValueOffset =
-      NumberDictionary::kElementsStartOffset + kPointerSize;
-  __ ldr(result, FieldMemOperand(t2, kValueOffset));
-}
-
-
 void LoadIC::GenerateArrayLength(MacroAssembler* masm) {
   // ----------- S t a t e -------------
   //  -- r2    : name
@@ -738,7 +643,7 @@ void KeyedCallIC::GenerateMegamorphic(MacroAssembler* masm, int argc) {
   __ b(ne, &slow_load);
   __ mov(r0, Operand(r2, ASR, kSmiTagSize));
   // r0: untagged index
-  GenerateNumberDictionaryLoad(masm, &slow_load, r4, r2, r1, r0, r3, r5);
+  __ LoadFromNumberDictionary(&slow_load, r4, r2, r1, r0, r3, r5);
   __ IncrementCounter(counters->keyed_call_generic_smi_dict(), 1, r0, r3);
   __ jmp(&do_call);
 
@@ -1127,7 +1032,7 @@ void KeyedLoadIC::GenerateGeneric(MacroAssembler* masm) {
   __ cmp(r3, ip);
   __ b(ne, &slow);
   __ mov(r2, Operand(r0, ASR, kSmiTagSize));
-  GenerateNumberDictionaryLoad(masm, &slow, r4, r0, r0, r2, r3, r5);
+  __ LoadFromNumberDictionary(&slow, r4, r0, r0, r2, r3, r5);
   __ Ret();
 
   // Slow case, key and receiver still in r0 and r1.
diff --git a/deps/v8/src/arm/lithium-codegen-arm.cc b/deps/v8/src/arm/lithium-codegen-arm.cc
index ee36314209..dc93aea346 100644
--- a/deps/v8/src/arm/lithium-codegen-arm.cc
+++ b/deps/v8/src/arm/lithium-codegen-arm.cc
@@ -551,6 +551,13 @@ void LCodeGen::CallCodeGeneric(Handle<Code> code,
   RecordPosition(pointers->position());
   __ Call(code, mode);
   RegisterLazyDeoptimization(instr, safepoint_mode);
+
+  // Signal that we don't inline smi code before these stubs in the
+  // optimizing code generator.
+  if (code->kind() == Code::BINARY_OP_IC ||
+      code->kind() == Code::COMPARE_IC) {
+    __ nop();
+  }
 }
 
 
@@ -1506,6 +1513,7 @@ void LCodeGen::DoArithmeticT(LArithmeticT* instr) {
 
   BinaryOpStub stub(instr->op(), NO_OVERWRITE);
   CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr);
+  __ nop();  // Signals no inlined code.
 }
 
 
diff --git a/deps/v8/src/arm/macro-assembler-arm.cc b/deps/v8/src/arm/macro-assembler-arm.cc
index 08a1cb9453..320879a627 100644
--- a/deps/v8/src/arm/macro-assembler-arm.cc
+++ b/deps/v8/src/arm/macro-assembler-arm.cc
@@ -1343,6 +1343,100 @@ void MacroAssembler::CheckAccessGlobalProxy(Register holder_reg,
 }
 
 
+void MacroAssembler::LoadFromNumberDictionary(Label* miss,
+                                              Register elements,
+                                              Register key,
+                                              Register result,
+                                              Register t0,
+                                              Register t1,
+                                              Register t2) {
+  // Register use:
+  //
+  // elements - holds the slow-case elements of the receiver on entry.
+  //            Unchanged unless 'result' is the same register.
+  //
+  // key      - holds the smi key on entry.
+  //            Unchanged unless 'result' is the same register.
+  //
+  // result   - holds the result on exit if the load succeeded.
+  //            Allowed to be the same as 'key' or 'result'.
+  //            Unchanged on bailout so 'key' or 'result' can be used
+  //            in further computation.
+  //
+  // Scratch registers:
+  //
+  // t0 - holds the untagged key on entry and holds the hash once computed.
+  //
+  // t1 - used to hold the capacity mask of the dictionary
+  //
+  // t2 - used for the index into the dictionary.
+  Label done;
+
+  // Compute the hash code from the untagged key.  This must be kept in sync
+  // with ComputeIntegerHash in utils.h.
+  //
+  // hash = ~hash + (hash << 15);
+  mvn(t1, Operand(t0));
+  add(t0, t1, Operand(t0, LSL, 15));
+  // hash = hash ^ (hash >> 12);
+  eor(t0, t0, Operand(t0, LSR, 12));
+  // hash = hash + (hash << 2);
+  add(t0, t0, Operand(t0, LSL, 2));
+  // hash = hash ^ (hash >> 4);
+  eor(t0, t0, Operand(t0, LSR, 4));
+  // hash = hash * 2057;
+  mov(t1, Operand(2057));
+  mul(t0, t0, t1);
+  // hash = hash ^ (hash >> 16);
+  eor(t0, t0, Operand(t0, LSR, 16));
+
+  // Compute the capacity mask.
+  ldr(t1, FieldMemOperand(elements, NumberDictionary::kCapacityOffset));
+  mov(t1, Operand(t1, ASR, kSmiTagSize));  // convert smi to int
+  sub(t1, t1, Operand(1));
+
+  // Generate an unrolled loop that performs a few probes before giving up.
+  static const int kProbes = 4;
+  for (int i = 0; i < kProbes; i++) {
+    // Use t2 for index calculations and keep the hash intact in t0.
+    mov(t2, t0);
+    // Compute the masked index: (hash + i + i * i) & mask.
+    if (i > 0) {
+      add(t2, t2, Operand(NumberDictionary::GetProbeOffset(i)));
+    }
+    and_(t2, t2, Operand(t1));
+
+    // Scale the index by multiplying by the element size.
+    ASSERT(NumberDictionary::kEntrySize == 3);
+    add(t2, t2, Operand(t2, LSL, 1));  // t2 = t2 * 3
+
+    // Check if the key is identical to the name.
+    add(t2, elements, Operand(t2, LSL, kPointerSizeLog2));
+    ldr(ip, FieldMemOperand(t2, NumberDictionary::kElementsStartOffset));
+    cmp(key, Operand(ip));
+    if (i != kProbes - 1) {
+      b(eq, &done);
+    } else {
+      b(ne, miss);
+    }
+  }
+
+  bind(&done);
+  // Check that the value is a normal property.
+  // t2: elements + (index * kPointerSize)
+  const int kDetailsOffset =
+      NumberDictionary::kElementsStartOffset + 2 * kPointerSize;
+  ldr(t1, FieldMemOperand(t2, kDetailsOffset));
+  tst(t1, Operand(Smi::FromInt(PropertyDetails::TypeField::mask())));
+  b(ne, miss);
+
+  // Get the value at the masked, scaled index and return.
+  const int kValueOffset =
+      NumberDictionary::kElementsStartOffset + kPointerSize;
+  ldr(result, FieldMemOperand(t2, kValueOffset));
+}
+
+
 void MacroAssembler::AllocateInNewSpace(int object_size,
                                         Register result,
                                         Register scratch1,
diff --git a/deps/v8/src/arm/macro-assembler-arm.h b/deps/v8/src/arm/macro-assembler-arm.h
index 1918858ebe..07281a7caf 100644
--- a/deps/v8/src/arm/macro-assembler-arm.h
+++ b/deps/v8/src/arm/macro-assembler-arm.h
@@ -433,6 +433,16 @@ class MacroAssembler: public Assembler {
                               Register scratch,
                               Label* miss);
 
+
+  void LoadFromNumberDictionary(Label* miss,
+                                Register elements,
+                                Register key,
+                                Register result,
+                                Register t0,
+                                Register t1,
+                                Register t2);
+
+
   inline void MarkCode(NopMarkerTypes type) {
     nop(type);
   }
diff --git a/deps/v8/src/arm/regexp-macro-assembler-arm.h b/deps/v8/src/arm/regexp-macro-assembler-arm.h
index d771e4033f..0e653868b6 100644
--- a/deps/v8/src/arm/regexp-macro-assembler-arm.h
+++ b/deps/v8/src/arm/regexp-macro-assembler-arm.h
@@ -28,6 +28,9 @@
 #ifndef V8_ARM_REGEXP_MACRO_ASSEMBLER_ARM_H_
 #define V8_ARM_REGEXP_MACRO_ASSEMBLER_ARM_H_
 
+#include "arm/assembler-arm.h"
+#include "arm/assembler-arm-inl.h"
+
 namespace v8 {
 namespace internal {
 
diff --git a/deps/v8/src/arm/stub-cache-arm.cc b/deps/v8/src/arm/stub-cache-arm.cc
index caa6a0eef9..86e49716d3 100644
--- a/deps/v8/src/arm/stub-cache-arm.cc
+++ b/deps/v8/src/arm/stub-cache-arm.cc
@@ -3100,7 +3100,8 @@ MaybeObject* KeyedLoadStubCompiler::CompileLoadElement(Map* receiver_map) {
   //  -- r1    : receiver
   // -----------------------------------
   Code* stub;
-  MaybeObject* maybe_stub = ComputeSharedKeyedLoadElementStub(receiver_map);
+  JSObject::ElementsKind elements_kind = receiver_map->elements_kind();
+  MaybeObject* maybe_stub = KeyedLoadElementStub(elements_kind).TryGetCode();
   if (!maybe_stub->To(&stub)) return maybe_stub;
   __ DispatchMap(r1,
                  r2,
@@ -3193,7 +3194,10 @@ MaybeObject* KeyedStoreStubCompiler::CompileStoreElement(Map* receiver_map) {
   //  -- r3    : scratch
   // -----------------------------------
   Code* stub;
-  MaybeObject* maybe_stub = ComputeSharedKeyedStoreElementStub(receiver_map);
+  JSObject::ElementsKind elements_kind = receiver_map->elements_kind();
+  bool is_js_array = receiver_map->instance_type() == JS_ARRAY_TYPE;
+  MaybeObject* maybe_stub =
+      KeyedStoreElementStub(is_js_array, elements_kind).TryGetCode();
   if (!maybe_stub->To(&stub)) return maybe_stub;
   __ DispatchMap(r2,
                  r3,
@@ -3388,6 +3392,53 @@ MaybeObject* ConstructStubCompiler::CompileConstructStub(JSFunction* function) {
 #define __ ACCESS_MASM(masm)
 
 
+void KeyedLoadStubCompiler::GenerateLoadDictionaryElement(
+    MacroAssembler* masm) {
+  // ---------- S t a t e --------------
+  //  -- lr     : return address
+  //  -- r0     : key
+  //  -- r1     : receiver
+  // -----------------------------------
+  Label slow, miss_force_generic;
+
+  Register key = r0;
+  Register receiver = r1;
+
+  __ JumpIfNotSmi(key, &miss_force_generic);
+  __ mov(r2, Operand(key, ASR, kSmiTagSize));
+  __ ldr(r4, FieldMemOperand(receiver, JSObject::kElementsOffset));
+  __ LoadFromNumberDictionary(&slow, r4, key, r0, r2, r3, r5);
+  __ Ret();
+
+  __ bind(&slow);
+  __ IncrementCounter(
+      masm->isolate()->counters()->keyed_load_external_array_slow(),
+      1, r2, r3);
+
+  // ---------- S t a t e --------------
+  //  -- lr     : return address
+  //  -- r0     : key
+  //  -- r1     : receiver
+  // -----------------------------------
+  Handle<Code> slow_ic =
+      masm->isolate()->builtins()->KeyedLoadIC_Slow();
+  __ Jump(slow_ic, RelocInfo::CODE_TARGET);
+
+  // Miss case, call the runtime.
+  __ bind(&miss_force_generic);
+
+  // ---------- S t a t e --------------
+  //  -- lr     : return address
+  //  -- r0     : key
+  //  -- r1     : receiver
+  // -----------------------------------
+
+  Handle<Code> miss_ic =
+      masm->isolate()->builtins()->KeyedLoadIC_MissForceGeneric();
+  __ Jump(miss_ic, RelocInfo::CODE_TARGET);
+}
+
+
 static bool IsElementTypeSigned(JSObject::ElementsKind elements_kind) {
   switch (elements_kind) {
     case JSObject::EXTERNAL_BYTE_ELEMENTS:
diff --git a/deps/v8/src/code-stubs.cc b/deps/v8/src/code-stubs.cc
index db57280f41..5c0ef5a4a5 100644
--- a/deps/v8/src/code-stubs.cc
+++ b/deps/v8/src/code-stubs.cc
@@ -61,21 +61,29 @@ void CodeStub::GenerateCode(MacroAssembler* masm) {
 }
 
 
+SmartPointer<const char> CodeStub::GetName() {
+  char buffer[100];
+  NoAllocationStringAllocator allocator(buffer,
+                                        static_cast<unsigned>(sizeof(buffer)));
+  StringStream stream(&allocator);
+  PrintName(&stream);
+  return stream.ToCString();
+}
+
+
 void CodeStub::RecordCodeGeneration(Code* code, MacroAssembler* masm) {
   code->set_major_key(MajorKey());
 
   Isolate* isolate = masm->isolate();
-  PROFILE(isolate, CodeCreateEvent(Logger::STUB_TAG, code, GetName()));
-  GDBJIT(AddCode(GDBJITInterface::STUB, GetName(), code));
+  SmartPointer<const char> name = GetName();
+  PROFILE(isolate, CodeCreateEvent(Logger::STUB_TAG, code, *name));
+  GDBJIT(AddCode(GDBJITInterface::STUB, *name, code));
   Counters* counters = isolate->counters();
   counters->total_stubs_code_size()->Increment(code->instruction_size());
 
 #ifdef ENABLE_DISASSEMBLER
   if (FLAG_print_code_stubs) {
-#ifdef DEBUG
-    Print();
-#endif
-    code->Disassemble(GetName());
+    code->Disassemble(*name);
     PrintF("\n");
   }
 #endif
@@ -170,7 +178,7 @@ MaybeObject* CodeStub::TryGetCode() {
 const char* CodeStub::MajorName(CodeStub::Major major_key,
                                 bool allow_unknown_keys) {
   switch (major_key) {
-#define DEF_CASE(name) case name: return #name;
+#define DEF_CASE(name) case name: return #name "Stub";
     CODE_STUB_LIST(DEF_CASE)
 #undef DEF_CASE
     default:
@@ -213,13 +221,7 @@ void ICCompareStub::Generate(MacroAssembler* masm) {
 }
 
 
-const char* InstanceofStub::GetName() {
-  if (name_ != NULL) return name_;
-  const int kMaxNameLength = 100;
-  name_ = Isolate::Current()->bootstrapper()->AllocateAutoDeletedArray(
-      kMaxNameLength);
-  if (name_ == NULL) return "OOM";
-
+void InstanceofStub::PrintName(StringStream* stream) {
   const char* args = "";
   if (HasArgsInRegisters()) {
     args = "_REGS";
@@ -235,33 +237,95 @@ const char* InstanceofStub::GetName() {
     return_true_false_object = "_TRUEFALSE";
   }
 
-  OS::SNPrintF(Vector<char>(name_, kMaxNameLength),
-               "InstanceofStub%s%s%s",
-               args,
-               inline_check,
-               return_true_false_object);
-  return name_;
+  stream->Add("InstanceofStub%s%s%s",
+              args,
+              inline_check,
+              return_true_false_object);
 }
 
 
-void KeyedLoadFastElementStub::Generate(MacroAssembler* masm) {
-  KeyedLoadStubCompiler::GenerateLoadFastElement(masm);
+void KeyedLoadElementStub::Generate(MacroAssembler* masm) {
+  switch (elements_kind_) {
+    case JSObject::FAST_ELEMENTS:
+      KeyedLoadStubCompiler::GenerateLoadFastElement(masm);
+      break;
+    case JSObject::FAST_DOUBLE_ELEMENTS:
+      UNIMPLEMENTED();
+      break;
+    case JSObject::EXTERNAL_BYTE_ELEMENTS:
+    case JSObject::EXTERNAL_UNSIGNED_BYTE_ELEMENTS:
+    case JSObject::EXTERNAL_SHORT_ELEMENTS:
+    case JSObject::EXTERNAL_UNSIGNED_SHORT_ELEMENTS:
+    case JSObject::EXTERNAL_INT_ELEMENTS:
+    case JSObject::EXTERNAL_UNSIGNED_INT_ELEMENTS:
+    case JSObject::EXTERNAL_FLOAT_ELEMENTS:
+    case JSObject::EXTERNAL_DOUBLE_ELEMENTS:
+    case JSObject::EXTERNAL_PIXEL_ELEMENTS:
+      KeyedLoadStubCompiler::GenerateLoadExternalArray(masm, elements_kind_);
+      break;
+    case JSObject::DICTIONARY_ELEMENTS:
+      KeyedLoadStubCompiler::GenerateLoadDictionaryElement(masm);
+      break;
+    case JSObject::NON_STRICT_ARGUMENTS_ELEMENTS:
+      UNREACHABLE();
+      break;
+  }
 }
 
 
-void KeyedStoreFastElementStub::Generate(MacroAssembler* masm) {
-  KeyedStoreStubCompiler::GenerateStoreFastElement(masm, is_js_array_);
+void KeyedStoreElementStub::Generate(MacroAssembler* masm) {
+  switch (elements_kind_) {
+    case JSObject::FAST_ELEMENTS:
+      KeyedStoreStubCompiler::GenerateStoreFastElement(masm, is_js_array_);
+      break;
+    case JSObject::FAST_DOUBLE_ELEMENTS:
+      UNIMPLEMENTED();
+      break;
+    case JSObject::EXTERNAL_BYTE_ELEMENTS:
+    case JSObject::EXTERNAL_UNSIGNED_BYTE_ELEMENTS:
+    case JSObject::EXTERNAL_SHORT_ELEMENTS:
+    case JSObject::EXTERNAL_UNSIGNED_SHORT_ELEMENTS:
+    case JSObject::EXTERNAL_INT_ELEMENTS:
+    case JSObject::EXTERNAL_UNSIGNED_INT_ELEMENTS:
+    case JSObject::EXTERNAL_FLOAT_ELEMENTS:
+    case JSObject::EXTERNAL_DOUBLE_ELEMENTS:
+    case JSObject::EXTERNAL_PIXEL_ELEMENTS:
+      KeyedStoreStubCompiler::GenerateStoreExternalArray(masm, elements_kind_);
+      break;
+    case JSObject::DICTIONARY_ELEMENTS:
+      KeyedStoreStubCompiler::GenerateStoreDictionaryElement(masm);
+      break;
+    case JSObject::NON_STRICT_ARGUMENTS_ELEMENTS:
+      UNREACHABLE();
+      break;
+  }
 }
 
 
-void KeyedLoadExternalArrayStub::Generate(MacroAssembler* masm) {
-  KeyedLoadStubCompiler::GenerateLoadExternalArray(masm, elements_kind_);
+void ArgumentsAccessStub::PrintName(StringStream* stream) {
+  const char* type_name = NULL;  // Make g++ happy.
+  switch (type_) {
+    case READ_ELEMENT: type_name = "ReadElement"; break;
+    case NEW_NON_STRICT_FAST: type_name = "NewNonStrictFast"; break;
+    case NEW_NON_STRICT_SLOW: type_name = "NewNonStrictSlow"; break;
+    case NEW_STRICT: type_name = "NewStrict"; break;
+  }
+  stream->Add("ArgumentsAccessStub_%s", type_name);
 }
 
 
-void KeyedStoreExternalArrayStub::Generate(MacroAssembler* masm) {
-  KeyedStoreStubCompiler::GenerateStoreExternalArray(masm, elements_kind_);
+void CallFunctionStub::PrintName(StringStream* stream) {
+  const char* in_loop_name = NULL;  // Make g++ happy.
+  switch (in_loop_) {
+    case NOT_IN_LOOP: in_loop_name = ""; break;
+    case IN_LOOP: in_loop_name = "_InLoop"; break;
+  }
+  const char* flags_name = NULL;  // Make g++ happy.
+  switch (flags_) {
+    case NO_CALL_FUNCTION_FLAGS: flags_name = ""; break;
+    case RECEIVER_MIGHT_BE_IMPLICIT: flags_name = "_Implicit"; break;
+  }
+  stream->Add("CallFunctionStub_Args%d%s%s", argc_, in_loop_name, flags_name);
 }
 
-
 } }  // namespace v8::internal
diff --git a/deps/v8/src/code-stubs.h b/deps/v8/src/code-stubs.h
index 3a756585e5..17c245c80e 100644
--- a/deps/v8/src/code-stubs.h
+++ b/deps/v8/src/code-stubs.h
@@ -70,10 +70,8 @@ namespace internal {
   V(NumberToString)                      \
   V(CEntry)                              \
   V(JSEntry)                             \
-  V(KeyedLoadFastElement)                \
-  V(KeyedStoreFastElement)               \
-  V(KeyedLoadExternalArray)              \
-  V(KeyedStoreExternalArray)             \
+  V(KeyedLoadElement)                    \
+  V(KeyedStoreElement)                   \
   V(DebuggerStatement)                   \
   V(StringDictionaryNegativeLookup)
 
@@ -183,16 +181,15 @@ class CodeStub BASE_EMBEDDED {
   }
 
   // Returns a name for logging/debugging purposes.
-  virtual const char* GetName() { return MajorName(MajorKey(), false); }
+  SmartPointer<const char> GetName();
+  virtual void PrintName(StringStream* stream) {
+    stream->Add("%s", MajorName(MajorKey(), false));
+  }
 
   // Returns whether the code generated for this stub needs to be allocated as
   // a fixed (non-moveable) code object.
   virtual bool NeedsImmovableCode() { return false; }
 
-  #ifdef DEBUG
-  virtual void Print() { PrintF("%s\n", GetName()); }
-#endif
-
   // Computes the key based on major and minor.
   uint32_t GetKey() {
     ASSERT(static_cast<int>(MajorKey()) < NUMBER_OF_IDS);
@@ -274,8 +271,6 @@ class StackCheckStub : public CodeStub {
   void Generate(MacroAssembler* masm);
 
  private:
-  const char* GetName() { return "StackCheckStub"; }
-
   Major MajorKey() { return StackCheck; }
   int MinorKey() { return 0; }
 };
@@ -290,7 +285,6 @@ class ToNumberStub: public CodeStub {
  private:
   Major MajorKey() { return ToNumber; }
   int MinorKey() { return 0; }
-  const char* GetName() { return "ToNumberStub"; }
 };
 
 
@@ -302,7 +296,6 @@ class FastNewClosureStub : public CodeStub {
   void Generate(MacroAssembler* masm);
 
  private:
-  const char* GetName() { return "FastNewClosureStub"; }
   Major MajorKey() { return FastNewClosure; }
   int MinorKey() { return strict_mode_; }
 
@@ -323,7 +316,6 @@ class FastNewContextStub : public CodeStub {
  private:
   int slots_;
 
-  const char* GetName() { return "FastNewContextStub"; }
   Major MajorKey() { return FastNewContext; }
   int MinorKey() { return slots_; }
 };
@@ -352,7 +344,6 @@ class FastCloneShallowArrayStub : public CodeStub {
   Mode mode_;
   int length_;
 
-  const char* GetName() { return "FastCloneShallowArrayStub"; }
   Major MajorKey() { return FastCloneShallowArray; }
   int MinorKey() {
     ASSERT(mode_ == 0 || mode_ == 1);
@@ -370,7 +361,7 @@ class InstanceofStub: public CodeStub {
     kReturnTrueFalseObject = 1 << 2
   };
 
-  explicit InstanceofStub(Flags flags) : flags_(flags), name_(NULL) { }
+  explicit InstanceofStub(Flags flags) : flags_(flags) { }
 
   static Register left();
   static Register right();
@@ -393,10 +384,9 @@ class InstanceofStub: public CodeStub {
     return (flags_ & kReturnTrueFalseObject) != 0;
   }
 
-  const char* GetName();
+  virtual void PrintName(StringStream* stream);
 
   Flags flags_;
-  char* name_;
 };
 
 
@@ -408,8 +398,6 @@ class MathPowStub: public CodeStub {
  private:
   virtual CodeStub::Major MajorKey() { return MathPow; }
   virtual int MinorKey() { return 0; }
-
-  const char* GetName() { return "MathPowStub"; }
 };
 
 
@@ -476,8 +464,7 @@ class CompareStub: public CodeStub {
       include_number_compare_((flags & NO_NUMBER_COMPARE_IN_STUB) == 0),
       include_smi_compare_((flags & NO_SMI_COMPARE_IN_STUB) == 0),
       lhs_(lhs),
-      rhs_(rhs),
-      name_(NULL) { }
+      rhs_(rhs) { }
 
   CompareStub(Condition cc,
               bool strict,
@@ -488,8 +475,7 @@ class CompareStub: public CodeStub {
       include_number_compare_((flags & NO_NUMBER_COMPARE_IN_STUB) == 0),
       include_smi_compare_((flags & NO_SMI_COMPARE_IN_STUB) == 0),
       lhs_(no_reg),
-      rhs_(no_reg),
-      name_(NULL) { }
+      rhs_(no_reg) { }
 
   void Generate(MacroAssembler* masm);
 
@@ -543,26 +529,7 @@ class CompareStub: public CodeStub {
 
   // Unfortunately you have to run without snapshots to see most of these
   // names in the profile since most compare stubs end up in the snapshot.
-  char* name_;
-  const char* GetName();
-#ifdef DEBUG
-  void Print() {
-    PrintF("CompareStub (minor %d) (cc %d), (strict %s), "
-           "(never_nan_nan %s), (smi_compare %s) (number_compare %s) ",
-           MinorKey(),
-           static_cast<int>(cc_),
-           strict_ ? "true" : "false",
-           never_nan_nan_ ? "true" : "false",
-           include_smi_compare_ ? "inluded" : "not included",
-           include_number_compare_ ? "included" : "not included");
-
-    if (!lhs_.is(no_reg) && !rhs_.is(no_reg)) {
-      PrintF("(lhs r%d), (rhs r%d)\n", lhs_.code(), rhs_.code());
-    } else {
-      PrintF("\n");
-    }
-  }
-#endif
+  virtual void PrintName(StringStream* stream);
 };
 
 
@@ -593,8 +560,6 @@ class CEntryStub : public CodeStub {
   int MinorKey();
 
   bool NeedsImmovableCode();
-
-  const char* GetName() { return "CEntryStub"; }
 };
 
 
@@ -610,8 +575,6 @@ class JSEntryStub : public CodeStub {
  private:
   Major MajorKey() { return JSEntry; }
   int MinorKey() { return 0; }
-
-  const char* GetName() { return "JSEntryStub"; }
 };
 
 
@@ -624,7 +587,9 @@ class JSConstructEntryStub : public JSEntryStub {
  private:
   int MinorKey() { return 1; }
 
-  const char* GetName() { return "JSConstructEntryStub"; }
+  virtual void PrintName(StringStream* stream) {
+    stream->Add("JSConstructEntryStub");
+  }
 };
 
 
@@ -651,13 +616,7 @@ class ArgumentsAccessStub: public CodeStub {
   void GenerateNewNonStrictFast(MacroAssembler* masm);
   void GenerateNewNonStrictSlow(MacroAssembler* masm);
 
-  const char* GetName() { return "ArgumentsAccessStub"; }
-
-#ifdef DEBUG
-  void Print() {
-    PrintF("ArgumentsAccessStub (type %d)\n", type_);
-  }
-#endif
+  virtual void PrintName(StringStream* stream);
 };
 
 
@@ -670,14 +629,6 @@ class RegExpExecStub: public CodeStub {
   int MinorKey() { return 0; }
 
   void Generate(MacroAssembler* masm);
-
-  const char* GetName() { return "RegExpExecStub"; }
-
-#ifdef DEBUG
-  void Print() {
-    PrintF("RegExpExecStub\n");
-  }
-#endif
 };
 
 
@@ -690,14 +641,6 @@ class RegExpConstructResultStub: public CodeStub {
   int MinorKey() { return 0; }
 
   void Generate(MacroAssembler* masm);
-
-  const char* GetName() { return "RegExpConstructResultStub"; }
-
-#ifdef DEBUG
-  void Print() {
-    PrintF("RegExpConstructResultStub\n");
-  }
-#endif
 };
 
 
@@ -717,14 +660,7 @@ class CallFunctionStub: public CodeStub {
   InLoopFlag in_loop_;
   CallFunctionFlags flags_;
 
-#ifdef DEBUG
-  void Print() {
-    PrintF("CallFunctionStub (args %d, in_loop %d, flags %d)\n",
-           argc_,
-           static_cast<int>(in_loop_),
-           static_cast<int>(flags_));
-  }
-#endif
+  virtual void PrintName(StringStream* stream);
 
   // Minor key encoding in 32 bits with Bitfield <Type, shift, size>.
   class InLoopBits: public BitField<InLoopFlag, 0, 1> {};
@@ -921,83 +857,44 @@ class AllowStubCallsScope {
   DISALLOW_COPY_AND_ASSIGN(AllowStubCallsScope);
 };
 
-#ifdef DEBUG
-#define DECLARE_ARRAY_STUB_PRINT(name) void Print() { PrintF(#name); }
-#else
-#define DECLARE_ARRAY_STUB_PRINT(name)
-#endif
 
-
-class KeyedLoadFastElementStub : public CodeStub {
+class KeyedLoadElementStub : public CodeStub {
  public:
-  explicit KeyedLoadFastElementStub() {
-  }
+  explicit KeyedLoadElementStub(JSObject::ElementsKind elements_kind)
+      : elements_kind_(elements_kind)
+  { }
 
-  Major MajorKey() { return KeyedLoadFastElement; }
-  int MinorKey() { return 0; }
+  Major MajorKey() { return KeyedLoadElement; }
+  int MinorKey() { return elements_kind_; }
 
   void Generate(MacroAssembler* masm);
 
-  const char* GetName() { return "KeyedLoadFastElementStub"; }
+ private:
+  JSObject::ElementsKind elements_kind_;
 
-  DECLARE_ARRAY_STUB_PRINT(KeyedLoadFastElementStub)
+  DISALLOW_COPY_AND_ASSIGN(KeyedLoadElementStub);
 };
 
 
-class KeyedStoreFastElementStub : public CodeStub {
+class KeyedStoreElementStub : public CodeStub {
  public:
-  explicit KeyedStoreFastElementStub(bool is_js_array)
-      : is_js_array_(is_js_array) { }
+  KeyedStoreElementStub(bool is_js_array,
+                        JSObject::ElementsKind elements_kind)
+    : is_js_array_(is_js_array),
+    elements_kind_(elements_kind) { }
 
-  Major MajorKey() { return KeyedStoreFastElement; }
-  int MinorKey() { return is_js_array_ ? 1 : 0; }
+  Major MajorKey() { return KeyedStoreElement; }
+  int MinorKey() {
+    return (is_js_array_ ? 0 : JSObject::kElementsKindCount) + elements_kind_;
+  }
 
   void Generate(MacroAssembler* masm);
 
-  const char* GetName() { return "KeyedStoreFastElementStub"; }
-
-  DECLARE_ARRAY_STUB_PRINT(KeyedStoreFastElementStub)
-
  private:
   bool is_js_array_;
-};
-
-
-class KeyedLoadExternalArrayStub : public CodeStub {
- public:
-  explicit KeyedLoadExternalArrayStub(JSObject::ElementsKind elements_kind)
-      : elements_kind_(elements_kind) { }
-
-  Major MajorKey() { return KeyedLoadExternalArray; }
-  int MinorKey() { return elements_kind_; }
-
-  void Generate(MacroAssembler* masm);
-
-  const char* GetName() { return "KeyedLoadExternalArrayStub"; }
-
-  DECLARE_ARRAY_STUB_PRINT(KeyedLoadExternalArrayStub)
-
- protected:
   JSObject::ElementsKind elements_kind_;
-};
-
-
-class KeyedStoreExternalArrayStub : public CodeStub {
- public:
-  explicit KeyedStoreExternalArrayStub(JSObject::ElementsKind elements_kind)
-      : elements_kind_(elements_kind) { }
-
-  Major MajorKey() { return KeyedStoreExternalArray; }
-  int MinorKey() { return elements_kind_; }
-
-  void Generate(MacroAssembler* masm);
-
-  const char* GetName() { return "KeyedStoreExternalArrayStub"; }
 
-  DECLARE_ARRAY_STUB_PRINT(KeyedStoreExternalArrayStub)
-
- protected:
-  JSObject::ElementsKind elements_kind_;
+  DISALLOW_COPY_AND_ASSIGN(KeyedStoreElementStub);
 };
 
 
diff --git a/deps/v8/src/codegen.cc b/deps/v8/src/codegen.cc
index 4e5c781361..fb723a3bcc 100644
--- a/deps/v8/src/codegen.cc
+++ b/deps/v8/src/codegen.cc
@@ -169,8 +169,6 @@ void CodeGenerator::PrintCode(Handle<Code> code, CompilationInfo* info) {
 #endif  // ENABLE_DISASSEMBLER
 }
 
-#ifdef ENABLE_LOGGING_AND_PROFILING
-
 static Vector<const char> kRegexp = CStrVector("regexp");
 
 bool CodeGenerator::ShouldGenerateLog(Expression* type) {
@@ -187,8 +185,6 @@ bool CodeGenerator::ShouldGenerateLog(Expression* type) {
   return false;
 }
 
-#endif
-
 
 bool CodeGenerator::RecordPositions(MacroAssembler* masm,
                                     int pos,
diff --git a/deps/v8/src/conversions-inl.h b/deps/v8/src/conversions-inl.h
index bb24a9c2b7..f1f526ffc0 100644
--- a/deps/v8/src/conversions-inl.h
+++ b/deps/v8/src/conversions-inl.h
@@ -43,6 +43,11 @@
 namespace v8 {
 namespace internal {
 
+static inline double JunkStringValue() {
+  return std::numeric_limits<double>::quiet_NaN();
+}
+
+
 // The fast double-to-unsigned-int conversion routine does not guarantee
 // rounding towards zero, or any reasonable value if the argument is larger
 // than what fits in an unsigned 32-bit integer.
@@ -151,7 +156,7 @@ static double InternalStringToIntDouble(UnicodeCache* unicode_cache,
           !AdvanceToNonspace(unicode_cache, &current, end)) {
         break;
       } else {
-        return JUNK_STRING_VALUE;
+        return JunkStringValue();
       }
     }
 
@@ -181,7 +186,7 @@ static double InternalStringToIntDouble(UnicodeCache* unicode_cache,
 
       if (!allow_trailing_junk &&
           AdvanceToNonspace(unicode_cache, &current, end)) {
-        return JUNK_STRING_VALUE;
+        return JunkStringValue();
       }
 
       int middle_value = (1 << (overflow_bits_count - 1));
@@ -229,7 +234,7 @@ static double InternalStringToInt(UnicodeCache* unicode_cache,
                                   EndMark end,
                                   int radix) {
   const bool allow_trailing_junk = true;
-  const double empty_string_val = JUNK_STRING_VALUE;
+  const double empty_string_val = JunkStringValue();
 
   if (!AdvanceToNonspace(unicode_cache, &current, end)) {
     return empty_string_val;
@@ -242,12 +247,12 @@ static double InternalStringToInt(UnicodeCache* unicode_cache,
     // Ignore leading sign; skip following spaces.
     ++current;
     if (current == end) {
-      return JUNK_STRING_VALUE;
+      return JunkStringValue();
     }
   } else if (*current == '-') {
     ++current;
     if (current == end) {
-      return JUNK_STRING_VALUE;
+      return JunkStringValue();
     }
     negative = true;
   }
@@ -260,7 +265,7 @@ static double InternalStringToInt(UnicodeCache* unicode_cache,
       if (*current == 'x' || *current == 'X') {
         radix = 16;
         ++current;
-        if (current == end) return JUNK_STRING_VALUE;
+        if (current == end) return JunkStringValue();
       } else {
         radix = 8;
         leading_zero = true;
@@ -275,14 +280,14 @@ static double InternalStringToInt(UnicodeCache* unicode_cache,
       if (current == end) return SignedZero(negative);
       if (*current == 'x' || *current == 'X') {
         ++current;
-        if (current == end) return JUNK_STRING_VALUE;
+        if (current == end) return JunkStringValue();
       } else {
         leading_zero = true;
       }
     }
   }
 
-  if (radix < 2 || radix > 36) return JUNK_STRING_VALUE;
+  if (radix < 2 || radix > 36) return JunkStringValue();
 
   // Skip leading zeros.
   while (*current == '0') {
@@ -292,7 +297,7 @@ static double InternalStringToInt(UnicodeCache* unicode_cache,
   }
 
   if (!leading_zero && !isDigit(*current, radix)) {
-    return JUNK_STRING_VALUE;
+    return JunkStringValue();
   }
 
   if (IsPowerOf2(radix)) {
@@ -340,7 +345,7 @@ static double InternalStringToInt(UnicodeCache* unicode_cache,
 
     if (!allow_trailing_junk &&
         AdvanceToNonspace(unicode_cache, &current, end)) {
-      return JUNK_STRING_VALUE;
+      return JunkStringValue();
     }
 
     ASSERT(buffer_pos < kBufferSize);
@@ -406,7 +411,7 @@ static double InternalStringToInt(UnicodeCache* unicode_cache,
 
   if (!allow_trailing_junk &&
       AdvanceToNonspace(unicode_cache, &current, end)) {
-    return JUNK_STRING_VALUE;
+    return JunkStringValue();
   }
 
   return negative ? -v : v;
@@ -456,22 +461,22 @@ static double InternalStringToDouble(UnicodeCache* unicode_cache,
   if (*current == '+') {
     // Ignore leading sign.
     ++current;
-    if (current == end) return JUNK_STRING_VALUE;
+    if (current == end) return JunkStringValue();
   } else if (*current == '-') {
     ++current;
-    if (current == end) return JUNK_STRING_VALUE;
+    if (current == end) return JunkStringValue();
     negative = true;
   }
 
   static const char kInfinitySymbol[] = "Infinity";
   if (*current == kInfinitySymbol[0]) {
     if (!SubStringEquals(&current, end, kInfinitySymbol)) {
-      return JUNK_STRING_VALUE;
+      return JunkStringValue();
     }
 
     if (!allow_trailing_junk &&
         AdvanceToNonspace(unicode_cache, &current, end)) {
-      return JUNK_STRING_VALUE;
+      return JunkStringValue();
     }
 
     ASSERT(buffer_pos == 0);
@@ -489,7 +494,7 @@ static double InternalStringToDouble(UnicodeCache* unicode_cache,
     if ((flags & ALLOW_HEX) && (*current == 'x' || *current == 'X')) {
       ++current;
       if (current == end || !isDigit(*current, 16)) {
-        return JUNK_STRING_VALUE;  // "0x".
+        return JunkStringValue();  // "0x".
       }
 
       return InternalStringToIntDouble<4>(unicode_cache,
@@ -529,13 +534,13 @@ static double InternalStringToDouble(UnicodeCache* unicode_cache,
   }
 
   if (*current == '.') {
-    if (octal && !allow_trailing_junk) return JUNK_STRING_VALUE;
+    if (octal && !allow_trailing_junk) return JunkStringValue();
     if (octal) goto parsing_done;
 
     ++current;
     if (current == end) {
       if (significant_digits == 0 && !leading_zero) {
-        return JUNK_STRING_VALUE;
+        return JunkStringValue();
       } else {
         goto parsing_done;
       }
@@ -576,18 +581,18 @@ static double InternalStringToDouble(UnicodeCache* unicode_cache,
     // If exponent < 0 then string was [+-]\.0*...
     // If significant_digits != 0 the string is not equal to 0.
     // Otherwise there are no digits in the string.
-    return JUNK_STRING_VALUE;
+    return JunkStringValue();
   }
 
   // Parse exponential part.
   if (*current == 'e' || *current == 'E') {
-    if (octal) return JUNK_STRING_VALUE;
+    if (octal) return JunkStringValue();
     ++current;
     if (current == end) {
       if (allow_trailing_junk) {
         goto parsing_done;
       } else {
-        return JUNK_STRING_VALUE;
+        return JunkStringValue();
       }
     }
     char sign = '+';
@@ -598,7 +603,7 @@ static double InternalStringToDouble(UnicodeCache* unicode_cache,
         if (allow_trailing_junk) {
           goto parsing_done;
         } else {
-          return JUNK_STRING_VALUE;
+          return JunkStringValue();
         }
       }
     }
@@ -607,7 +612,7 @@ static double InternalStringToDouble(UnicodeCache* unicode_cache,
       if (allow_trailing_junk) {
         goto parsing_done;
       } else {
-        return JUNK_STRING_VALUE;
+        return JunkStringValue();
       }
     }
 
@@ -631,7 +636,7 @@ static double InternalStringToDouble(UnicodeCache* unicode_cache,
 
   if (!allow_trailing_junk &&
       AdvanceToNonspace(unicode_cache, &current, end)) {
-    return JUNK_STRING_VALUE;
+    return JunkStringValue();
   }
 
   parsing_done:
diff --git a/deps/v8/src/conversions.cc b/deps/v8/src/conversions.cc
index 232eda08c9..c34fe519c4 100644
--- a/deps/v8/src/conversions.cc
+++ b/deps/v8/src/conversions.cc
@@ -430,24 +430,4 @@ char* DoubleToRadixCString(double value, int radix) {
   return builder.Finalize();
 }
 
-
-static Mutex* dtoa_lock_one = OS::CreateMutex();
-static Mutex* dtoa_lock_zero = OS::CreateMutex();
-
-
 } }  // namespace v8::internal
-
-
-extern "C" {
-void ACQUIRE_DTOA_LOCK(int n) {
-  ASSERT(n == 0 || n == 1);
-  (n == 0 ? v8::internal::dtoa_lock_zero : v8::internal::dtoa_lock_one)->Lock();
-}
-
-
-void FREE_DTOA_LOCK(int n) {
-  ASSERT(n == 0 || n == 1);
-  (n == 0 ? v8::internal::dtoa_lock_zero : v8::internal::dtoa_lock_one)->
-      Unlock();
-}
-}
diff --git a/deps/v8/src/conversions.h b/deps/v8/src/conversions.h
index c3e27b2025..7b02c47f6a 100644
--- a/deps/v8/src/conversions.h
+++ b/deps/v8/src/conversions.h
@@ -44,8 +44,6 @@ namespace internal {
 // we don't need to preserve all the digits.
 const int kMaxSignificantDigits = 772;
 
-static const double JUNK_STRING_VALUE =
-    std::numeric_limits<double>::quiet_NaN();
 
 static bool isDigit(int x, int radix) {
   return (x >= '0' && x <= '9' && x < '0' + radix)
diff --git a/deps/v8/src/cpu-profiler-inl.h b/deps/v8/src/cpu-profiler-inl.h
index d7a23a518a..938b632214 100644
--- a/deps/v8/src/cpu-profiler-inl.h
+++ b/deps/v8/src/cpu-profiler-inl.h
@@ -30,8 +30,6 @@
 
 #include "cpu-profiler.h"
 
-#ifdef ENABLE_LOGGING_AND_PROFILING
-
 #include <new>
 #include "circular-queue-inl.h"
 #include "profile-generator-inl.h"
@@ -83,6 +81,4 @@ bool ProfilerEventsProcessor::FilterOutCodeCreateEvent(
 
 } }  // namespace v8::internal
 
-#endif  // ENABLE_LOGGING_AND_PROFILING
-
 #endif  // V8_CPU_PROFILER_INL_H_
diff --git a/deps/v8/src/cpu-profiler.cc b/deps/v8/src/cpu-profiler.cc
index 8b10e8188c..bb480fc345 100644
--- a/deps/v8/src/cpu-profiler.cc
+++ b/deps/v8/src/cpu-profiler.cc
@@ -29,8 +29,6 @@
 
 #include "cpu-profiler-inl.h"
 
-#ifdef ENABLE_LOGGING_AND_PROFILING
-
 #include "frames-inl.h"
 #include "hashmap.h"
 #include "log-inl.h"
@@ -574,31 +572,21 @@ void CpuProfiler::StopProcessor() {
   logger->logging_nesting_ = saved_logging_nesting_;
 }
 
-} }  // namespace v8::internal
-
-#endif  // ENABLE_LOGGING_AND_PROFILING
-
-namespace v8 {
-namespace internal {
 
 void CpuProfiler::Setup() {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   Isolate* isolate = Isolate::Current();
   if (isolate->cpu_profiler() == NULL) {
     isolate->set_cpu_profiler(new CpuProfiler());
   }
-#endif
 }
 
 
 void CpuProfiler::TearDown() {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   Isolate* isolate = Isolate::Current();
   if (isolate->cpu_profiler() != NULL) {
     delete isolate->cpu_profiler();
   }
   isolate->set_cpu_profiler(NULL);
-#endif
 }
 
 } }  // namespace v8::internal
diff --git a/deps/v8/src/cpu-profiler.h b/deps/v8/src/cpu-profiler.h
index 42d79a578e..4175e8f680 100644
--- a/deps/v8/src/cpu-profiler.h
+++ b/deps/v8/src/cpu-profiler.h
@@ -28,8 +28,6 @@
 #ifndef V8_CPU_PROFILER_H_
 #define V8_CPU_PROFILER_H_
 
-#ifdef ENABLE_LOGGING_AND_PROFILING
-
 #include "allocation.h"
 #include "atomicops.h"
 #include "circular-queue.h"
@@ -206,9 +204,6 @@ class ProfilerEventsProcessor : public Thread {
       v8::internal::CpuProfiler::Call;                        \
     }                                                         \
   } while (false)
-#else
-#define PROFILE(isolate, Call) LOG(isolate, Call)
-#endif  // ENABLE_LOGGING_AND_PROFILING
 
 
 namespace v8 {
@@ -221,7 +216,6 @@ class CpuProfiler {
   static void Setup();
   static void TearDown();
 
-#ifdef ENABLE_LOGGING_AND_PROFILING
   static void StartProfiling(const char* title);
   static void StartProfiling(String* title);
   static CpuProfile* StopProfiling(const char* title);
@@ -289,10 +283,6 @@ class CpuProfiler {
   bool need_to_stop_sampler_;
   Atomic32 is_profiling_;
 
-#else
-  static INLINE(bool is_profiling(Isolate* isolate)) { return false; }
-#endif  // ENABLE_LOGGING_AND_PROFILING
-
  private:
   DISALLOW_COPY_AND_ASSIGN(CpuProfiler);
 };
diff --git a/deps/v8/src/d8.cc b/deps/v8/src/d8.cc
index 6f948c6e5c..5f57350093 100644
--- a/deps/v8/src/d8.cc
+++ b/deps/v8/src/d8.cc
@@ -41,6 +41,9 @@
 #include "natives.h"
 #include "platform.h"
 
+#if !defined(_WIN32) && !defined(_WIN64)
+#include <unistd.h>  // NOLINT
+#endif
 
 namespace v8 {
 
@@ -97,6 +100,8 @@ CounterCollection Shell::local_counters_;
 CounterCollection* Shell::counters_ = &local_counters_;
 Persistent<Context> Shell::utility_context_;
 Persistent<Context> Shell::evaluation_context_;
+i::Mutex* Shell::context_mutex_(i::OS::CreateMutex());
+ShellOptions Shell::options;
 
 
 bool CounterMap::Match(void* key1, void* key2) {
@@ -119,6 +124,7 @@ bool Shell::ExecuteString(Handle<String> source,
                           bool report_exceptions) {
   HandleScope handle_scope;
   TryCatch try_catch;
+  options.script_executed = true;
   if (i::FLAG_debugger) {
     // When debugging make exceptions appear to be uncaught.
     try_catch.SetVerbose(true);
@@ -238,7 +244,7 @@ Handle<Value> Shell::CreateExternalArray(const Arguments& args,
     if (raw_length < 0) {
       return ThrowException(String::New("Array length must not be negative."));
     }
-    if (raw_length > v8::internal::ExternalArray::kMaxLength) {
+    if (raw_length > i::ExternalArray::kMaxLength) {
       return ThrowException(
           String::New("Array length exceeds maximum length."));
     }
@@ -246,7 +252,7 @@ Handle<Value> Shell::CreateExternalArray(const Arguments& args,
   } else {
     return ThrowException(String::New("Array length must be a number."));
   }
-  if (length > static_cast<size_t>(internal::ExternalArray::kMaxLength)) {
+  if (length > static_cast<size_t>(i::ExternalArray::kMaxLength)) {
     return ThrowException(String::New("Array length exceeds maximum length."));
   }
   void* data = calloc(length, element_size);
@@ -540,7 +546,6 @@ void Shell::InstallUtilityScript() {
       shell_source_name.length());
   Handle<Script> script = Script::Compile(source, name);
   script->Run();
-
   // Mark the d8 shell script as native to avoid it showing up as normal source
   // in the debugger.
   i::Handle<i::Object> compiled_script = Utils::OpenHandle(*script);
@@ -550,6 +555,13 @@ void Shell::InstallUtilityScript() {
      : i::Handle<i::Script>(i::Script::cast(
          i::SharedFunctionInfo::cast(*compiled_script)->script()));
   script_object->set_type(i::Smi::FromInt(i::Script::TYPE_NATIVE));
+
+#ifdef ENABLE_DEBUGGER_SUPPORT
+  // Start the in-process debugger if requested.
+  if (i::FLAG_debugger && !i::FLAG_debugger_agent) {
+    v8::Debug::SetDebugEventListener(HandleDebugEvent);
+  }
+#endif
 }
 
 
@@ -625,7 +637,7 @@ Handle<ObjectTemplate> Shell::CreateGlobalTemplate() {
 }
 
 
-void Shell::Initialize(bool test_shell) {
+void Shell::Initialize() {
 #ifdef COMPRESS_STARTUP_DATA_BZ2
   BZip2Decompressor startup_data_decompressor;
   int bz2_result = startup_data_decompressor.Decompress();
@@ -645,7 +657,7 @@ void Shell::Initialize(bool test_shell) {
     V8::SetAddHistogramSampleFunction(AddHistogramSample);
   }
 
-  if (test_shell) return;
+  if (options.test_shell) return;
 
   Locker lock;
   HandleScope scope;
@@ -657,26 +669,17 @@ void Shell::Initialize(bool test_shell) {
   if (i::FLAG_debugger_agent) {
     v8::Debug::EnableAgent("d8 shell", i::FLAG_debugger_port, true);
   }
-
-  // Start the in-process debugger if requested.
-  if (i::FLAG_debugger && !i::FLAG_debugger_agent) {
-    v8::Debug::SetDebugEventListener(HandleDebugEvent);
-  }
 #endif
 }
 
 
-void Shell::RenewEvaluationContext() {
+Persistent<Context> Shell::CreateEvaluationContext() {
+  // This needs to be a critical section since this is not thread-safe
+  i::ScopedLock lock(context_mutex_);
   // Initialize the global objects
-  HandleScope scope;
   Handle<ObjectTemplate> global_template = CreateGlobalTemplate();
-
-  // (Re-)create the evaluation context
-  if (!evaluation_context_.IsEmpty()) {
-    evaluation_context_.Dispose();
-  }
-  evaluation_context_ = Context::New(NULL, global_template);
-  Context::Scope utility_scope(evaluation_context_);
+  Persistent<Context> context = Context::New(NULL, global_template);
+  Context::Scope scope(context);
 
   i::JSArguments js_args = i::FLAG_js_arguments;
   i::Handle<i::FixedArray> arguments_array =
@@ -688,28 +691,27 @@ void Shell::RenewEvaluationContext() {
   }
   i::Handle<i::JSArray> arguments_jsarray =
       FACTORY->NewJSArrayWithElements(arguments_array);
-  evaluation_context_->Global()->Set(String::New("arguments"),
+  context->Global()->Set(String::New("arguments"),
                                      Utils::ToLocal(arguments_jsarray));
+  return context;
 }
 
 
 void Shell::OnExit() {
   if (i::FLAG_dump_counters) {
-    ::printf("+----------------------------------------+-------------+\n");
-    ::printf("| Name                                   | Value       |\n");
-    ::printf("+----------------------------------------+-------------+\n");
+    printf("+----------------------------------------+-------------+\n");
+    printf("| Name                                   | Value       |\n");
+    printf("+----------------------------------------+-------------+\n");
     for (CounterMap::Iterator i(counter_map_); i.More(); i.Next()) {
       Counter* counter = i.CurrentValue();
       if (counter->is_histogram()) {
-        ::printf("| c:%-36s | %11i |\n", i.CurrentKey(), counter->count());
-        ::printf("| t:%-36s | %11i |\n",
-                 i.CurrentKey(),
-                 counter->sample_total());
+        printf("| c:%-36s | %11i |\n", i.CurrentKey(), counter->count());
+        printf("| t:%-36s | %11i |\n", i.CurrentKey(), counter->sample_total());
       } else {
-        ::printf("| %-38s | %11i |\n", i.CurrentKey(), counter->count());
+        printf("| %-38s | %11i |\n", i.CurrentKey(), counter->count());
       }
     }
-    ::printf("+----------------------------------------+-------------+\n");
+    printf("+----------------------------------------+-------------+\n");
   }
   if (counters_file_ != NULL)
     delete counters_file_;
@@ -717,7 +719,8 @@ void Shell::OnExit() {
 
 
 static char* ReadChars(const char* name, int* size_out) {
-  v8::Unlocker unlocker;  // Release the V8 lock while reading files.
+  // Release the V8 lock while reading files.
+  v8::Unlocker unlocker(Isolate::GetCurrent());
   FILE* file = i::OS::FOpen(name, "rb");
   if (file == NULL) return NULL;
 
@@ -806,11 +809,6 @@ class ShellThread : public i::Thread {
 
 
 void ShellThread::Run() {
-  // Prepare the context for this thread.
-  Locker locker;
-  HandleScope scope;
-  Handle<ObjectTemplate> global_template = Shell::CreateGlobalTemplate();
-
   char* ptr = const_cast<char*>(files_.start());
   while ((ptr != NULL) && (*ptr != '\0')) {
     // For each newline-separated line.
@@ -822,7 +820,10 @@ void ShellThread::Run() {
       continue;
     }
 
-    Persistent<Context> thread_context = Context::New(NULL, global_template);
+    // Prepare the context for this thread.
+    Locker locker;
+    HandleScope scope;
+    Persistent<Context> thread_context = Shell::CreateEvaluationContext();
     Context::Scope context_scope(thread_context);
 
     while ((ptr != NULL) && (*ptr != '\0')) {
@@ -848,153 +849,296 @@ void ShellThread::Run() {
   }
 }
 
-int Shell::RunMain(int argc, char* argv[], bool* executed) {
-  // Default use preemption if threads are created.
-  bool use_preemption = true;
 
-  // Default to use lowest possible thread preemption interval to test as many
-  // edgecases as possible.
-  int preemption_interval = 1;
+void SourceGroup::ExitShell(int exit_code) {
+  // Use _exit instead of exit to avoid races between isolate
+  // threads and static destructors.
+  fflush(stdout);
+  fflush(stderr);
+  _exit(exit_code);
+}
 
-  i::List<i::Thread*> threads(1);
 
-  {
-    // Since the thread below may spawn new threads accessing V8 holding the
-    // V8 lock here is mandatory.
-    Locker locker;
-    RenewEvaluationContext();
-    Context::Scope context_scope(evaluation_context_);
-    for (int i = 1; i < argc; i++) {
-      char* str = argv[i];
-      if (strcmp(str, "--preemption") == 0) {
-        use_preemption = true;
-      } else if (strcmp(str, "--no-preemption") == 0) {
-        use_preemption = false;
-      } else if (strcmp(str, "--preemption-interval") == 0) {
-        if (i + 1 < argc) {
-          char* end = NULL;
-          preemption_interval = strtol(argv[++i], &end, 10);  // NOLINT
-          if (preemption_interval <= 0 || *end != '\0' || errno == ERANGE) {
-            printf("Invalid value for --preemption-interval '%s'\n", argv[i]);
-            return 1;
-          }
-        } else {
-          printf("Missing value for --preemption-interval\n");
-          return 1;
-        }
-      } else if (strcmp(str, "-f") == 0) {
-        // Ignore any -f flags for compatibility with other stand-alone
-        // JavaScript engines.
-        continue;
-      } else if (strncmp(str, "--", 2) == 0) {
-        printf("Warning: unknown flag %s.\nTry --help for options\n", str);
-      } else if (strcmp(str, "-e") == 0 && i + 1 < argc) {
-        // Execute argument given to -e option directly.
-        v8::HandleScope handle_scope;
-        v8::Handle<v8::String> file_name = v8::String::New("unnamed");
-        v8::Handle<v8::String> source = v8::String::New(argv[++i]);
-        (*executed) = true;
-        if (!ExecuteString(source, file_name, false, true)) {
-          OnExit();
-          return 1;
-        }
-      } else if (strcmp(str, "-p") == 0 && i + 1 < argc) {
-        int size = 0;
-        const char* files = ReadChars(argv[++i], &size);
-        if (files == NULL) return 1;
-        ShellThread* thread =
-            new ShellThread(threads.length(),
-                            i::Vector<const char>(files, size));
-        thread->Start();
-        threads.Add(thread);
-        (*executed) = true;
-      } else {
-        // Use all other arguments as names of files to load and run.
-        HandleScope handle_scope;
-        Handle<String> file_name = v8::String::New(str);
-        Handle<String> source = ReadFile(str);
-        (*executed) = true;
-        if (source.IsEmpty()) {
-          printf("Error reading '%s'\n", str);
-          return 1;
-        }
-        if (!ExecuteString(source, file_name, false, true)) {
-          OnExit();
-          return 1;
-        }
+void SourceGroup::Execute() {
+  for (int i = begin_offset_; i < end_offset_; ++i) {
+    const char* arg = argv_[i];
+    if (strcmp(arg, "-e") == 0 && i + 1 < end_offset_) {
+      // Execute argument given to -e option directly.
+      HandleScope handle_scope;
+      Handle<String> file_name = String::New("unnamed");
+      Handle<String> source = String::New(argv_[i + 1]);
+      if (!Shell::ExecuteString(source, file_name, false, true)) {
+        ExitShell(1);
+        return;
+      }
+      ++i;
+    } else if (arg[0] == '-') {
+      // Ignore other options. They have been parsed already.
+    } else {
+      // Use all other arguments as names of files to load and run.
+      HandleScope handle_scope;
+      Handle<String> file_name = String::New(arg);
+      Handle<String> source = ReadFile(arg);
+      if (source.IsEmpty()) {
+        printf("Error reading '%s'\n", arg);
+        ExitShell(1);
+        return;
+      }
+      if (!Shell::ExecuteString(source, file_name, false, true)) {
+        ExitShell(1);
+        return;
       }
     }
+  }
+}
 
-    // Start preemption if threads have been created and preemption is enabled.
-    if (threads.length() > 0 && use_preemption) {
-      Locker::StartPreemption(preemption_interval);
-    }
+
+Handle<String> SourceGroup::ReadFile(const char* name) {
+  FILE* file = fopen(name, "rb");
+  if (file == NULL) return Handle<String>();
+
+  fseek(file, 0, SEEK_END);
+  int size = ftell(file);
+  rewind(file);
+
+  char* chars = new char[size + 1];
+  chars[size] = '\0';
+  for (int i = 0; i < size;) {
+    int read = fread(&chars[i], 1, size - i, file);
+    i += read;
   }
+  fclose(file);
+  Handle<String> result = String::New(chars, size);
+  delete[] chars;
+  return result;
+}
 
-  for (int i = 0; i < threads.length(); i++) {
-    i::Thread* thread = threads[i];
-    thread->Join();
-    delete thread;
+
+i::Thread::Options SourceGroup::GetThreadOptions() {
+  i::Thread::Options options;
+  options.name = "IsolateThread";
+  // On some systems (OSX 10.6) the stack size default is 0.5Mb or less
+  // which is not enough to parse the big literal expressions used in tests.
+  // The stack size should be at least StackGuard::kLimitSize + some
+  // OS-specific padding for thread startup code.
+  options.stack_size = 2 << 20;  // 2 Mb seems to be enough
+  return options;
+}
+
+
+void SourceGroup::ExecuteInThread() {
+  Isolate* isolate = Isolate::New();
+  do {
+    if (next_semaphore_ != NULL) next_semaphore_->Wait();
+    {
+      Isolate::Scope iscope(isolate);
+      Locker lock(isolate);
+      HandleScope scope;
+      Persistent<Context> context = Shell::CreateEvaluationContext();
+      {
+        Context::Scope cscope(context);
+        Execute();
+      }
+      context.Dispose();
+    }
+    if (done_semaphore_ != NULL) done_semaphore_->Signal();
+  } while (!Shell::options.last_run);
+  isolate->Dispose();
+}
+
+
+void SourceGroup::StartExecuteInThread() {
+  if (thread_ == NULL) {
+    thread_ = new IsolateThread(this);
+    thread_->Start();
   }
-  OnExit();
-  return 0;
+  next_semaphore_->Signal();
 }
 
 
-int Shell::Main(int argc, char* argv[]) {
-  // Figure out if we're requested to stress the optimization
-  // infrastructure by running tests multiple times and forcing
-  // optimization in the last run.
-  bool FLAG_stress_opt = false;
-  bool FLAG_stress_deopt = false;
-  bool FLAG_interactive_shell = false;
-  bool FLAG_test_shell = false;
-  bool script_executed = false;
+void SourceGroup::WaitForThread() {
+  if (thread_ == NULL) return;
+  if (Shell::options.last_run) {
+    thread_->Join();
+    thread_ = NULL;
+  } else {
+    done_semaphore_->Wait();
+  }
+}
 
+
+bool Shell::SetOptions(int argc, char* argv[]) {
   for (int i = 0; i < argc; i++) {
     if (strcmp(argv[i], "--stress-opt") == 0) {
-      FLAG_stress_opt = true;
+      options.stress_opt = true;
       argv[i] = NULL;
     } else if (strcmp(argv[i], "--stress-deopt") == 0) {
-      FLAG_stress_deopt = true;
+      options.stress_deopt = true;
       argv[i] = NULL;
     } else if (strcmp(argv[i], "--noalways-opt") == 0) {
       // No support for stressing if we can't use --always-opt.
-      FLAG_stress_opt = false;
-      FLAG_stress_deopt = false;
+      options.stress_opt = false;
+      options.stress_deopt = false;
     } else if (strcmp(argv[i], "--shell") == 0) {
-      FLAG_interactive_shell = true;
+      options.interactive_shell = true;
       argv[i] = NULL;
     } else if (strcmp(argv[i], "--test") == 0) {
-      FLAG_test_shell = true;
+      options.test_shell = true;
+      argv[i] = NULL;
+    } else if (strcmp(argv[i], "--preemption") == 0) {
+      options.use_preemption = true;
       argv[i] = NULL;
+    } else if (strcmp(argv[i], "--no-preemption") == 0) {
+      options.use_preemption = false;
+      argv[i] = NULL;
+    } else if (strcmp(argv[i], "--preemption-interval") == 0) {
+      if (++i < argc) {
+        argv[i-1] = NULL;
+        char* end = NULL;
+        options.preemption_interval = strtol(argv[i], &end, 10);  // NOLINT
+        if (options.preemption_interval <= 0
+            || *end != '\0'
+            || errno == ERANGE) {
+          printf("Invalid value for --preemption-interval '%s'\n", argv[i]);
+          return false;
+        }
+        argv[i] = NULL;
+      } else {
+        printf("Missing value for --preemption-interval\n");
+        return false;
+      }
+    } else if (strcmp(argv[i], "-f") == 0) {
+      // Ignore any -f flags for compatibility with other stand-alone
+      // JavaScript engines.
+      continue;
+    } else if (strcmp(argv[i], "--isolate") == 0) {
+      options.num_isolates++;
+    }
+  }
+
+  // Run parallel threads if we are not using --isolate
+  for (int i = 1; i < argc; i++) {
+    if (argv[i] == NULL) continue;
+    if (strcmp(argv[i], "-p") == 0 && i + 1 < argc) {
+      if (options.num_isolates > 1) {
+        printf("-p is not compatible with --isolate\n");
+        return false;
+      }
+      argv[i] = NULL;
+      if (options.parallel_files == NULL) {
+        options.parallel_files = new i::List<i::Vector<const char> >();
+      }
+      int size = 0;
+      const char* files = ReadChars(argv[++i], &size);
+      if (files == NULL) {
+        printf("-p option incomplete\n");
+        return false;
+      }
+      argv[i] = NULL;
+      options.parallel_files->Add(i::Vector<const char>(files, size));
     }
   }
 
   v8::V8::SetFlagsFromCommandLine(&argc, argv, true);
 
-  Initialize(FLAG_test_shell);
+  // set up isolated source groups
+  options.isolate_sources = new SourceGroup[options.num_isolates];
+  SourceGroup* current = options.isolate_sources;
+  current->Begin(argv, 1);
+  for (int i = 1; i < argc; i++) {
+    const char* str = argv[i];
+    if (strcmp(str, "--isolate") == 0) {
+      current->End(i);
+      current++;
+      current->Begin(argv, i + 1);
+    } else if (strncmp(argv[i], "--", 2) == 0) {
+      printf("Warning: unknown flag %s.\nTry --help for options\n", argv[i]);
+    }
+  }
+  current->End(argc);
+
+  return true;
+}
+
+
+int Shell::RunMain(int argc, char* argv[]) {
+  i::List<i::Thread*> threads(1);
+
+  {
+    if (options.parallel_files != NULL)
+      for (int i = 0; i < options.parallel_files->length(); i++) {
+        i::Vector<const char> files = options.parallel_files->at(i);
+        ShellThread* thread = new ShellThread(threads.length(), files);
+        thread->Start();
+        threads.Add(thread);
+      }
+
+    for (int i = 1; i < options.num_isolates; ++i) {
+      options.isolate_sources[i].StartExecuteInThread();
+    }
+
+    Locker lock;
+    HandleScope scope;
+    Persistent<Context> context = CreateEvaluationContext();
+    {
+      Context::Scope cscope(context);
+      options.isolate_sources[0].Execute();
+    }
+    if (options.last_run) {
+      // Keep using the same context in the interactive shell
+      evaluation_context_ = context;
+    } else {
+      context.Dispose();
+    }
+    // Start preemption if threads have been created and preemption is enabled.
+    if (options.parallel_files != NULL
+        && threads.length() > 0
+        && options.use_preemption) {
+      Locker::StartPreemption(options.preemption_interval);
+    }
+  }
+
+  for (int i = 1; i < options.num_isolates; ++i) {
+    options.isolate_sources[i].WaitForThread();
+  }
+
+  if (options.parallel_files != NULL)
+    for (int i = 0; i < threads.length(); i++) {
+      i::Thread* thread = threads[i];
+      thread->Join();
+      delete thread;
+    }
+
+  OnExit();
+  return 0;
+}
+
+
+int Shell::Main(int argc, char* argv[]) {
+  if (!SetOptions(argc, argv)) return 1;
+  Initialize();
 
   int result = 0;
-  if (FLAG_stress_opt || FLAG_stress_deopt) {
-    v8::Testing::SetStressRunType(
-        FLAG_stress_opt ? v8::Testing::kStressTypeOpt
-            : v8::Testing::kStressTypeDeopt);
-    int stress_runs = v8::Testing::GetStressRuns();
+  if (options.stress_opt || options.stress_deopt) {
+    Testing::SetStressRunType(
+        options.stress_opt ? Testing::kStressTypeOpt
+                           : Testing::kStressTypeDeopt);
+    int stress_runs = Testing::GetStressRuns();
     for (int i = 0; i < stress_runs && result == 0; i++) {
       printf("============ Stress %d/%d ============\n", i + 1, stress_runs);
-      v8::Testing::PrepareStressRun(i);
-      result = RunMain(argc, argv, &script_executed);
+      Testing::PrepareStressRun(i);
+      options.last_run = (i == stress_runs - 1);
+      result = RunMain(argc, argv);
     }
     printf("======== Full Deoptimization =======\n");
-    v8::Testing::DeoptimizeAll();
+    Testing::DeoptimizeAll();
   } else {
-    result = RunMain(argc, argv, &script_executed);
+    result = RunMain(argc, argv);
   }
 
 #ifdef ENABLE_DEBUGGER_SUPPORT
   // Run remote debugger if requested, but never on --test
-  if (i::FLAG_remote_debugger && !FLAG_test_shell) {
+  if (i::FLAG_remote_debugger && !options.test_shell) {
     InstallUtilityScript();
     RunRemoteDebugger(i::FLAG_debugger_port);
     return 0;
@@ -1003,12 +1147,15 @@ int Shell::Main(int argc, char* argv[]) {
 
   // Run interactive shell if explicitly requested or if no script has been
   // executed, but never on --test
-  if ((FLAG_interactive_shell || !script_executed) && !FLAG_test_shell) {
+
+  if (( options.interactive_shell
+      || !options.script_executed )
+      && !options.test_shell ) {
     InstallUtilityScript();
     RunShell();
   }
 
-  v8::V8::Dispose();
+  V8::Dispose();
 
   return result;
 }
diff --git a/deps/v8/src/d8.gyp b/deps/v8/src/d8.gyp
index 8b52ed9a9a..85914ec672 100644
--- a/deps/v8/src/d8.gyp
+++ b/deps/v8/src/d8.gyp
@@ -38,10 +38,7 @@
         '../src',
       ],
       'defines': [
-        'ENABLE_LOGGING_AND_PROFILING',
         'ENABLE_DEBUGGER_SUPPORT',
-        'ENABLE_VMSTATE_TRACKING',
-        'V8_FAST_TLS',
       ],
       'sources': [
         'd8.cc',
diff --git a/deps/v8/src/d8.h b/deps/v8/src/d8.h
index e225469993..7f0272710b 100644
--- a/deps/v8/src/d8.h
+++ b/deps/v8/src/d8.h
@@ -112,6 +112,87 @@ class CounterMap {
 };
 
 
+class SourceGroup {
+ public:
+  SourceGroup()
+      : next_semaphore_(v8::internal::OS::CreateSemaphore(0)),
+        done_semaphore_(v8::internal::OS::CreateSemaphore(0)),
+        thread_(NULL),
+        argv_(NULL),
+        begin_offset_(0),
+        end_offset_(0) { }
+
+  void Begin(char** argv, int offset) {
+    argv_ = const_cast<const char**>(argv);
+    begin_offset_ = offset;
+  }
+
+  void End(int offset) { end_offset_ = offset; }
+
+  void Execute();
+
+  void StartExecuteInThread();
+  void WaitForThread();
+
+ private:
+  class IsolateThread : public i::Thread {
+   public:
+    explicit IsolateThread(SourceGroup* group)
+        : i::Thread(GetThreadOptions()), group_(group) {}
+
+    virtual void Run() {
+      group_->ExecuteInThread();
+    }
+
+   private:
+    SourceGroup* group_;
+  };
+
+  static i::Thread::Options GetThreadOptions();
+  void ExecuteInThread();
+
+  i::Semaphore* next_semaphore_;
+  i::Semaphore* done_semaphore_;
+  i::Thread* thread_;
+
+  void ExitShell(int exit_code);
+  Handle<String> ReadFile(const char* name);
+
+  const char** argv_;
+  int begin_offset_;
+  int end_offset_;
+};
+
+
+class ShellOptions {
+ public:
+  ShellOptions()
+     : script_executed(false),
+       last_run(true),
+       stress_opt(false),
+       stress_deopt(false),
+       interactive_shell(false),
+       test_shell(false),
+       use_preemption(true),
+       preemption_interval(10),
+       num_isolates(1),
+       isolate_sources(NULL),
+       parallel_files(NULL) { }
+
+  bool script_executed;
+  bool last_run;
+  bool stress_opt;
+  bool stress_deopt;
+  bool interactive_shell;
+  bool test_shell;
+  bool use_preemption;
+  int preemption_interval;
+  int num_isolates;
+  SourceGroup* isolate_sources;
+  i::List< i::Vector<const char> >* parallel_files;
+};
+
+
 class Shell: public i::AllStatic {
  public:
   static bool ExecuteString(Handle<String> source,
@@ -129,12 +210,13 @@ class Shell: public i::AllStatic {
   static void AddHistogramSample(void* histogram, int sample);
   static void MapCounters(const char* name);
   static Handle<String> ReadFile(const char* name);
-  static void Initialize(bool test_shell);
-  static void RenewEvaluationContext();
+  static void Initialize();
+  static Persistent<Context> CreateEvaluationContext();
   static void InstallUtilityScript();
   static void RunShell();
+  static bool SetOptions(int argc, char* argv[]);
   static int RunScript(char* filename);
-  static int RunMain(int argc, char* argv[], bool* executed);
+  static int RunMain(int argc, char* argv[]);
   static int Main(int argc, char* argv[]);
   static Handle<ObjectTemplate> CreateGlobalTemplate();
   static Handle<Array> GetCompletions(Handle<String> text,
@@ -205,6 +287,8 @@ class Shell: public i::AllStatic {
   static const char* kHistoryFileName;
   static const char* kPrompt;
 
+  static ShellOptions options;
+
  private:
   static Persistent<Context> utility_context_;
   static Persistent<Context> evaluation_context_;
@@ -214,6 +298,7 @@ class Shell: public i::AllStatic {
   static CounterCollection local_counters_;
   static CounterCollection* counters_;
   static i::OS::MemoryMappedFile* counters_file_;
+  static i::Mutex* context_mutex_;
   static Counter* GetCounter(const char* name, bool is_histogram);
   static Handle<Value> CreateExternalArray(const Arguments& args,
                                            ExternalArrayType type,
diff --git a/deps/v8/src/debug.cc b/deps/v8/src/debug.cc
index f341fc6f1f..c48e514ab8 100644
--- a/deps/v8/src/debug.cc
+++ b/deps/v8/src/debug.cc
@@ -1821,6 +1821,13 @@ void Debug::SetAfterBreakTarget(JavaScriptFrame* frame) {
 bool Debug::IsBreakAtReturn(JavaScriptFrame* frame) {
   HandleScope scope(isolate_);
 
+  // If there are no break points this cannot be break at return, as
+  // the debugger statement and stack guard bebug break cannot be at
+  // return.
+  if (!has_break_points_) {
+    return false;
+  }
+
   // Get the executing function in which the debug break occurred.
   Handle<SharedFunctionInfo> shared =
       Handle<SharedFunctionInfo>(JSFunction::cast(frame->function())->shared());
diff --git a/deps/v8/src/debug.h b/deps/v8/src/debug.h
index c4d3c7e373..c614844ab5 100644
--- a/deps/v8/src/debug.h
+++ b/deps/v8/src/debug.h
@@ -1,4 +1,4 @@
-// Copyright 2006-2008 the V8 project authors. All rights reserved.
+// Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
@@ -35,6 +35,7 @@
 #include "execution.h"
 #include "factory.h"
 #include "flags.h"
+#include "frames-inl.h"
 #include "hashmap.h"
 #include "platform.h"
 #include "string-stream.h"
diff --git a/deps/v8/src/deoptimizer.cc b/deps/v8/src/deoptimizer.cc
index e8c659718f..175ee6e1fb 100644
--- a/deps/v8/src/deoptimizer.cc
+++ b/deps/v8/src/deoptimizer.cc
@@ -161,8 +161,7 @@ DeoptimizedFrameInfo* Deoptimizer::DebuggerInspectableFrame(
   // Get the "simulated" top and size for the requested frame.
   Address top =
       reinterpret_cast<Address>(deoptimizer->output_[frame_index]->GetTop());
-  unsigned size =
-      deoptimizer->output_[frame_index]->GetFrameSize() / kPointerSize;
+  uint32_t size = deoptimizer->output_[frame_index]->GetFrameSize();
 
   // Done with the GC-unsafe frame descriptions. This re-enables allocation.
   deoptimizer->DeleteFrameDescriptions();
@@ -547,7 +546,7 @@ void Deoptimizer::MaterializeHeapNumbers() {
 
 #ifdef ENABLE_DEBUGGER_SUPPORT
 void Deoptimizer::MaterializeHeapNumbersForDebuggerInspectableFrame(
-    Address top, intptr_t size, DeoptimizedFrameInfo* info) {
+    Address top, uint32_t size, DeoptimizedFrameInfo* info) {
   ASSERT_EQ(DEBUGGER, bailout_type_);
   for (int i = 0; i < deferred_heap_numbers_.length(); i++) {
     HeapNumberMaterializationDescriptor d = deferred_heap_numbers_[i];
@@ -557,17 +556,29 @@ void Deoptimizer::MaterializeHeapNumbersForDebuggerInspectableFrame(
     Address slot = d.slot_address();
     if (top <= slot && slot < top + size) {
       Handle<Object> num = isolate_->factory()->NewNumber(d.value());
-      int expression_index = static_cast<int>(
+      // Calculate the index with the botton of the expression stack
+      // at index 0, and the fixed part (including incoming arguments)
+      // at negative indexes.
+      int index = static_cast<int>(
           info->expression_count_ - (slot - top) / kPointerSize - 1);
       if (FLAG_trace_deopt) {
         PrintF("Materializing a new heap number %p [%e] in slot %p"
-               "for expression stack index %d\n",
+               "for stack index %d\n",
                reinterpret_cast<void*>(*num),
                d.value(),
                d.slot_address(),
-               expression_index);
+               index);
+      }
+      if (index >=0) {
+        info->SetExpression(index, *num);
+      } else {
+        // Calculate parameter index subtracting one for the receiver.
+        int parameter_index =
+            index +
+            static_cast<int>(size) / kPointerSize -
+            info->expression_count_ - 1;
+        info->SetParameter(parameter_index, *num);
       }
-      info->SetExpression(expression_index, *num);
     }
   }
 }
@@ -1126,6 +1137,22 @@ unsigned FrameDescription::GetOffsetFromSlotIndex(Deoptimizer* deoptimizer,
 }
 
 
+int FrameDescription::ComputeParametersCount() {
+  return function_->shared()->formal_parameter_count();
+}
+
+
+Object* FrameDescription::GetParameter(Deoptimizer* deoptimizer, int index) {
+  ASSERT_EQ(Code::FUNCTION, kind_);
+  ASSERT(index >= 0);
+  ASSERT(index < ComputeParametersCount());
+  // The slot indexes for incoming arguments are negative.
+  unsigned offset = GetOffsetFromSlotIndex(deoptimizer,
+                                           index - ComputeParametersCount());
+  return reinterpret_cast<Object*>(*GetFrameSlotPointer(offset));
+}
+
+
 unsigned FrameDescription::GetExpressionCount(Deoptimizer* deoptimizer) {
   ASSERT_EQ(Code::FUNCTION, kind_);
   unsigned size = GetFrameSize() - deoptimizer->ComputeFixedSize(GetFunction());
@@ -1415,7 +1442,13 @@ void SlotRef::ComputeSlotMappingForArguments(JavaScriptFrame* frame,
 DeoptimizedFrameInfo::DeoptimizedFrameInfo(
     Deoptimizer* deoptimizer, int frame_index) {
   FrameDescription* output_frame = deoptimizer->output_[frame_index];
+  SetFunction(output_frame->GetFunction());
   expression_count_ = output_frame->GetExpressionCount(deoptimizer);
+  parameters_count_ = output_frame->ComputeParametersCount();
+  parameters_ = new Object*[parameters_count_];
+  for (int i = 0; i < parameters_count_; i++) {
+    SetParameter(i, output_frame->GetParameter(deoptimizer, i));
+  }
   expression_stack_ = new Object*[expression_count_];
   for (int i = 0; i < expression_count_; i++) {
     SetExpression(i, output_frame->GetExpression(deoptimizer, i));
@@ -1424,10 +1457,13 @@ DeoptimizedFrameInfo::DeoptimizedFrameInfo(
 
 
 DeoptimizedFrameInfo::~DeoptimizedFrameInfo() {
-  delete expression_stack_;
+  delete[] expression_stack_;
+  delete[] parameters_;
 }
 
 void DeoptimizedFrameInfo::Iterate(ObjectVisitor* v) {
+  v->VisitPointer(reinterpret_cast<Object**>(&function_));
+  v->VisitPointers(parameters_, parameters_ + parameters_count_);
   v->VisitPointers(expression_stack_, expression_stack_ + expression_count_);
 }
 
diff --git a/deps/v8/src/deoptimizer.h b/deps/v8/src/deoptimizer.h
index 64823183a5..9265905366 100644
--- a/deps/v8/src/deoptimizer.h
+++ b/deps/v8/src/deoptimizer.h
@@ -194,7 +194,7 @@ class Deoptimizer : public Malloced {
   void MaterializeHeapNumbers();
 #ifdef ENABLE_DEBUGGER_SUPPORT
   void MaterializeHeapNumbersForDebuggerInspectableFrame(
-      Address top, intptr_t size, DeoptimizedFrameInfo* info);
+      Address top, uint32_t size, DeoptimizedFrameInfo* info);
 #endif
 
   static void ComputeOutputFrames(Deoptimizer* deoptimizer);
@@ -400,6 +400,12 @@ class FrameDescription {
   void SetKind(Code::Kind kind) { kind_ = kind; }
 #endif
 
+  // Get the incoming arguments count.
+  int ComputeParametersCount();
+
+  // Get a parameter value for an unoptimized frame.
+  Object* GetParameter(Deoptimizer* deoptimizer, int index);
+
   // Get the expression stack height for a unoptimized frame.
   unsigned GetExpressionCount(Deoptimizer* deoptimizer);
 
@@ -662,9 +668,23 @@ class DeoptimizedFrameInfo : public Malloced {
   // GC support.
   void Iterate(ObjectVisitor* v);
 
+  // Return the number of incoming arguments.
+  int parameters_count() { return parameters_count_; }
+
   // Return the height of the expression stack.
   int expression_count() { return expression_count_; }
 
+  // Get the frame function.
+  JSFunction* GetFunction() {
+    return function_;
+  }
+
+  // Get an incoming argument.
+  Object* GetParameter(int index) {
+    ASSERT(0 <= index && index < parameters_count());
+    return parameters_[index];
+  }
+
   // Get an expression from the expression stack.
   Object* GetExpression(int index) {
     ASSERT(0 <= index && index < expression_count());
@@ -672,13 +692,27 @@ class DeoptimizedFrameInfo : public Malloced {
   }
 
  private:
+  // Set the frame function.
+  void SetFunction(JSFunction* function) {
+    function_ = function;
+  }
+
+  // Set an incoming argument.
+  void SetParameter(int index, Object* obj) {
+    ASSERT(0 <= index && index < parameters_count());
+    parameters_[index] = obj;
+  }
+
   // Set an expression on the expression stack.
   void SetExpression(int index, Object* obj) {
     ASSERT(0 <= index && index < expression_count());
     expression_stack_[index] = obj;
   }
 
+  JSFunction* function_;
+  int parameters_count_;
   int expression_count_;
+  Object** parameters_;
   Object** expression_stack_;
 
   friend class Deoptimizer;
diff --git a/deps/v8/src/flag-definitions.h b/deps/v8/src/flag-definitions.h
index 6e13dd2d0a..2db44c3067 100644
--- a/deps/v8/src/flag-definitions.h
+++ b/deps/v8/src/flag-definitions.h
@@ -452,14 +452,10 @@ DEFINE_bool(trace_regexp_assembler,
             "trace regexp macro assembler calls.")
 
 //
-// Logging and profiling only flags
+// Logging and profiling flags
 //
 #undef FLAG
-#ifdef ENABLE_LOGGING_AND_PROFILING
 #define FLAG FLAG_FULL
-#else
-#define FLAG FLAG_READONLY
-#endif
 
 // log.cc
 DEFINE_bool(log, false,
@@ -491,19 +487,6 @@ DEFINE_string(logfile, "v8.log", "Specify the name of the log file.")
 DEFINE_bool(ll_prof, false, "Enable low-level linux profiler.")
 
 //
-// Heap protection flags
-// Using heap protection requires ENABLE_LOGGING_AND_PROFILING as well.
-//
-#ifdef ENABLE_HEAP_PROTECTION
-#undef FLAG
-#define FLAG FLAG_FULL
-
-DEFINE_bool(protect_heap, false,
-            "Protect/unprotect V8's heap when leaving/entring the VM.")
-
-#endif
-
-//
 // Disassembler only flags
 //
 #undef FLAG
diff --git a/deps/v8/src/frames.cc b/deps/v8/src/frames.cc
index 4e67463f1f..eaf09ebaf5 100644
--- a/deps/v8/src/frames.cc
+++ b/deps/v8/src/frames.cc
@@ -36,6 +36,8 @@
 #include "scopeinfo.h"
 #include "string-stream.h"
 
+#include "allocation-inl.h"
+
 namespace v8 {
 namespace internal {
 
@@ -346,7 +348,6 @@ void SafeStackFrameIterator::Reset() {
 // -------------------------------------------------------------------------
 
 
-#ifdef ENABLE_LOGGING_AND_PROFILING
 SafeStackTraceFrameIterator::SafeStackTraceFrameIterator(
     Isolate* isolate,
     Address fp, Address sp, Address low_bound, Address high_bound) :
@@ -362,7 +363,6 @@ void SafeStackTraceFrameIterator::Advance() {
     if (frame()->is_java_script()) return;
   }
 }
-#endif
 
 
 Code* StackFrame::GetSafepointData(Isolate* isolate,
diff --git a/deps/v8/src/frames.h b/deps/v8/src/frames.h
index 9e93daef3d..f542a92d96 100644
--- a/deps/v8/src/frames.h
+++ b/deps/v8/src/frames.h
@@ -843,7 +843,6 @@ class SafeStackFrameIterator BASE_EMBEDDED {
 };
 
 
-#ifdef ENABLE_LOGGING_AND_PROFILING
 typedef JavaScriptFrameIteratorTemp<SafeStackFrameIterator>
     SafeJavaScriptFrameIterator;
 
@@ -855,7 +854,6 @@ class SafeStackTraceFrameIterator: public SafeJavaScriptFrameIterator {
                                        Address low_bound, Address high_bound);
   void Advance();
 };
-#endif
 
 
 class StackFrameLocator BASE_EMBEDDED {
diff --git a/deps/v8/src/full-codegen.h b/deps/v8/src/full-codegen.h
index d25ca490f6..6b174f7427 100644
--- a/deps/v8/src/full-codegen.h
+++ b/deps/v8/src/full-codegen.h
@@ -444,7 +444,7 @@ class FullCodeGenerator: public AstVisitor {
                                        TypeofState typeof_state,
                                        Label* slow,
                                        Label* done);
-  void EmitVariableLoad(Variable* expr);
+  void EmitVariableLoad(VariableProxy* proxy);
 
   enum ResolveEvalFlag {
     SKIP_CONTEXT_LOOKUP,
diff --git a/deps/v8/src/handles.cc b/deps/v8/src/handles.cc
index d8cc742576..d73aaf0fca 100644
--- a/deps/v8/src/handles.cc
+++ b/deps/v8/src/handles.cc
@@ -543,11 +543,6 @@ Handle<Object> SetAccessor(Handle<JSObject> obj, Handle<AccessorInfo> info) {
 // associated with the wrapper and get rid of both the wrapper and the
 // handle.
 static void ClearWrapperCache(Persistent<v8::Value> handle, void*) {
-#ifdef ENABLE_HEAP_PROTECTION
-  // Weak reference callbacks are called as if from outside V8.  We
-  // need to reeenter to unprotect the heap.
-  VMState state(OTHER);
-#endif
   Handle<Object> cache = Utils::OpenHandle(*handle);
   JSValue* wrapper = JSValue::cast(*cache);
   Foreign* foreign = Script::cast(wrapper->value())->wrapper();
diff --git a/deps/v8/src/heap-profiler.cc b/deps/v8/src/heap-profiler.cc
index fb1ea8a641..7e613e9173 100644
--- a/deps/v8/src/heap-profiler.cc
+++ b/deps/v8/src/heap-profiler.cc
@@ -34,7 +34,6 @@ namespace v8 {
 namespace internal {
 
 
-#ifdef ENABLE_LOGGING_AND_PROFILING
 HeapProfiler::HeapProfiler()
     : snapshots_(new HeapSnapshotsCollection()),
       next_snapshot_uid_(1) {
@@ -52,29 +51,21 @@ void HeapProfiler::ResetSnapshots() {
 }
 
 
-#endif  // ENABLE_LOGGING_AND_PROFILING
-
 void HeapProfiler::Setup() {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   Isolate* isolate = Isolate::Current();
   if (isolate->heap_profiler() == NULL) {
     isolate->set_heap_profiler(new HeapProfiler());
   }
-#endif
 }
 
 
 void HeapProfiler::TearDown() {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   Isolate* isolate = Isolate::Current();
   delete isolate->heap_profiler();
   isolate->set_heap_profiler(NULL);
-#endif
 }
 
 
-#ifdef ENABLE_LOGGING_AND_PROFILING
-
 HeapSnapshot* HeapProfiler::TakeSnapshot(const char* name,
                                          int type,
                                          v8::ActivityControl* control) {
@@ -179,7 +170,5 @@ void HeapProfiler::ObjectMoveEvent(Address from, Address to) {
   snapshots_->ObjectMoveEvent(from, to);
 }
 
-#endif  // ENABLE_LOGGING_AND_PROFILING
-
 
 } }  // namespace v8::internal
diff --git a/deps/v8/src/heap-profiler.h b/deps/v8/src/heap-profiler.h
index c32f4c425f..b1bc91c307 100644
--- a/deps/v8/src/heap-profiler.h
+++ b/deps/v8/src/heap-profiler.h
@@ -33,8 +33,6 @@
 namespace v8 {
 namespace internal {
 
-#ifdef ENABLE_LOGGING_AND_PROFILING
-
 class HeapSnapshot;
 class HeapSnapshotsCollection;
 
@@ -45,9 +43,6 @@ class HeapSnapshotsCollection;
       profiler->call;                                                        \
     }                                                                        \
   } while (false)
-#else
-#define HEAP_PROFILE(heap, call) ((void) 0)
-#endif  // ENABLE_LOGGING_AND_PROFILING
 
 // The HeapProfiler writes data to the log files, which can be postprocessed
 // to generate .hp files for use by the GHC/Valgrind tool hp2ps.
@@ -56,7 +51,6 @@ class HeapProfiler {
   static void Setup();
   static void TearDown();
 
-#ifdef ENABLE_LOGGING_AND_PROFILING
   static HeapSnapshot* TakeSnapshot(const char* name,
                                     int type,
                                     v8::ActivityControl* control);
@@ -93,8 +87,6 @@ class HeapProfiler {
   HeapSnapshotsCollection* snapshots_;
   unsigned next_snapshot_uid_;
   List<v8::HeapProfiler::WrapperInfoCallback> wrapper_callbacks_;
-
-#endif  // ENABLE_LOGGING_AND_PROFILING
 };
 
 } }  // namespace v8::internal
diff --git a/deps/v8/src/heap.cc b/deps/v8/src/heap.cc
index 508bdf3c49..98a2d3374b 100644
--- a/deps/v8/src/heap.cc
+++ b/deps/v8/src/heap.cc
@@ -293,12 +293,11 @@ GarbageCollector Heap::SelectGarbageCollector(AllocationSpace space) {
 
 // TODO(1238405): Combine the infrastructure for --heap-stats and
 // --log-gc to avoid the complicated preprocessor and flag testing.
-#if defined(DEBUG) || defined(ENABLE_LOGGING_AND_PROFILING)
 void Heap::ReportStatisticsBeforeGC() {
   // Heap::ReportHeapStatistics will also log NewSpace statistics when
-  // compiled with ENABLE_LOGGING_AND_PROFILING and --log-gc is set.  The
-  // following logic is used to avoid double logging.
-#if defined(DEBUG) && defined(ENABLE_LOGGING_AND_PROFILING)
+  // compiled --log-gc is set.  The following logic is used to avoid
+  // double logging.
+#ifdef DEBUG
   if (FLAG_heap_stats || FLAG_log_gc) new_space_.CollectStatistics();
   if (FLAG_heap_stats) {
     ReportHeapStatistics("Before GC");
@@ -306,23 +305,16 @@ void Heap::ReportStatisticsBeforeGC() {
     new_space_.ReportStatistics();
   }
   if (FLAG_heap_stats || FLAG_log_gc) new_space_.ClearHistograms();
-#elif defined(DEBUG)
-  if (FLAG_heap_stats) {
-    new_space_.CollectStatistics();
-    ReportHeapStatistics("Before GC");
-    new_space_.ClearHistograms();
-  }
-#elif defined(ENABLE_LOGGING_AND_PROFILING)
+#else
   if (FLAG_log_gc) {
     new_space_.CollectStatistics();
     new_space_.ReportStatistics();
     new_space_.ClearHistograms();
   }
-#endif
+#endif  // DEBUG
 }
 
 
-#if defined(ENABLE_LOGGING_AND_PROFILING)
 void Heap::PrintShortHeapStatistics() {
   if (!FLAG_trace_gc_verbose) return;
   PrintF("Memory allocator,   used: %8" V8_PTR_PREFIX "d"
@@ -368,7 +360,6 @@ void Heap::PrintShortHeapStatistics() {
          lo_space_->Size(),
          lo_space_->Available());
 }
-#endif
 
 
 // TODO(1238405): Combine the infrastructure for --heap-stats and
@@ -376,20 +367,17 @@ void Heap::PrintShortHeapStatistics() {
 void Heap::ReportStatisticsAfterGC() {
   // Similar to the before GC, we use some complicated logic to ensure that
   // NewSpace statistics are logged exactly once when --log-gc is turned on.
-#if defined(DEBUG) && defined(ENABLE_LOGGING_AND_PROFILING)
+#if defined(DEBUG)
   if (FLAG_heap_stats) {
     new_space_.CollectStatistics();
     ReportHeapStatistics("After GC");
   } else if (FLAG_log_gc) {
     new_space_.ReportStatistics();
   }
-#elif defined(DEBUG)
-  if (FLAG_heap_stats) ReportHeapStatistics("After GC");
-#elif defined(ENABLE_LOGGING_AND_PROFILING)
+#else
   if (FLAG_log_gc) new_space_.ReportStatistics();
-#endif
+#endif  // DEBUG
 }
-#endif  // defined(DEBUG) || defined(ENABLE_LOGGING_AND_PROFILING)
 
 
 void Heap::GarbageCollectionPrologue() {
@@ -406,11 +394,11 @@ void Heap::GarbageCollectionPrologue() {
   }
 
   if (FLAG_gc_verbose) Print();
-#endif
+#endif  // DEBUG
 
-#if defined(DEBUG) || defined(ENABLE_LOGGING_AND_PROFILING)
+#if defined(DEBUG)
   ReportStatisticsBeforeGC();
-#endif
+#endif  // DEBUG
 
   LiveObjectList::GCPrologue();
 }
@@ -447,12 +435,10 @@ void Heap::GarbageCollectionEpilogue() {
       symbol_table()->Capacity());
   isolate_->counters()->number_of_symbols()->Set(
       symbol_table()->NumberOfElements());
-#if defined(DEBUG) || defined(ENABLE_LOGGING_AND_PROFILING)
+#if defined(DEBUG)
   ReportStatisticsAfterGC();
-#endif
-#ifdef ENABLE_DEBUGGER_SUPPORT
+#endif  // DEBUG
   isolate_->debug()->AfterGarbageCollection();
-#endif
 }
 
 
@@ -1335,15 +1321,12 @@ class ScavengingVisitor : public StaticVisitorBase {
   enum ObjectContents  { DATA_OBJECT, POINTER_OBJECT };
   enum SizeRestriction { SMALL, UNKNOWN_SIZE };
 
-#if defined(DEBUG) || defined(ENABLE_LOGGING_AND_PROFILING)
   static void RecordCopiedObject(Heap* heap, HeapObject* obj) {
     bool should_record = false;
 #ifdef DEBUG
     should_record = FLAG_heap_stats;
 #endif
-#ifdef ENABLE_LOGGING_AND_PROFILING
     should_record = should_record || FLAG_log_gc;
-#endif
     if (should_record) {
       if (heap->new_space()->Contains(obj)) {
         heap->new_space()->RecordAllocation(obj);
@@ -1352,7 +1335,6 @@ class ScavengingVisitor : public StaticVisitorBase {
       }
     }
   }
-#endif  // defined(DEBUG) || defined(ENABLE_LOGGING_AND_PROFILING)
 
   // Helper function used by CopyObject to copy a source object to an
   // allocated target object and update the forwarding pointer in the source
@@ -1368,12 +1350,9 @@ class ScavengingVisitor : public StaticVisitorBase {
     source->set_map_word(MapWord::FromForwardingAddress(target));
 
     if (logging_and_profiling_mode == LOGGING_AND_PROFILING_ENABLED) {
-#if defined(DEBUG) || defined(ENABLE_LOGGING_AND_PROFILING)
       // Update NewSpace stats if necessary.
       RecordCopiedObject(heap, target);
-#endif
       HEAP_PROFILE(heap, ObjectMoveEvent(source->address(), target->address()));
-#if defined(ENABLE_LOGGING_AND_PROFILING)
       Isolate* isolate = heap->isolate();
       if (isolate->logger()->is_logging() ||
           CpuProfiler::is_profiling(isolate)) {
@@ -1382,7 +1361,6 @@ class ScavengingVisitor : public StaticVisitorBase {
               source->address(), target->address()));
         }
       }
-#endif
     }
 
     return target;
@@ -1558,7 +1536,6 @@ static void InitializeScavengingVisitorsTables() {
 
 
 void Heap::SwitchScavengingVisitorsTableIfProfilingWasEnabled() {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   if (scavenging_visitors_table_mode_ == LOGGING_AND_PROFILING_ENABLED) {
     // Table was already updated by some isolate.
     return;
@@ -1584,7 +1561,6 @@ void Heap::SwitchScavengingVisitorsTableIfProfilingWasEnabled() {
     Release_Store(&scavenging_visitors_table_mode_,
                   LOGGING_AND_PROFILING_ENABLED);
   }
-#endif
 }
 
 
@@ -5213,28 +5189,6 @@ void Heap::Shrink() {
 }
 
 
-#ifdef ENABLE_HEAP_PROTECTION
-
-void Heap::Protect() {
-  if (HasBeenSetup()) {
-    AllSpaces spaces;
-    for (Space* space = spaces.next(); space != NULL; space = spaces.next())
-      space->Protect();
-  }
-}
-
-
-void Heap::Unprotect() {
-  if (HasBeenSetup()) {
-    AllSpaces spaces;
-    for (Space* space = spaces.next(); space != NULL; space = spaces.next())
-      space->Unprotect();
-  }
-}
-
-#endif
-
-
 void Heap::AddGCPrologueCallback(GCPrologueCallback callback, GCType gc_type) {
   ASSERT(callback != NULL);
   GCPrologueCallbackPair pair(callback, gc_type);
@@ -5930,9 +5884,7 @@ GCTracer::~GCTracer() {
     PrintF("\n");
   }
 
-#if defined(ENABLE_LOGGING_AND_PROFILING)
   heap_->PrintShortHeapStatistics();
-#endif
 }
 
 
diff --git a/deps/v8/src/heap.h b/deps/v8/src/heap.h
index 5aba05d9e7..d90a681d43 100644
--- a/deps/v8/src/heap.h
+++ b/deps/v8/src/heap.h
@@ -409,12 +409,6 @@ class Heap {
   // Uncommit unused semi space.
   bool UncommitFromSpace() { return new_space_.UncommitFromSpace(); }
 
-#ifdef ENABLE_HEAP_PROTECTION
-  // Protect/unprotect the heap by marking all spaces read-only/writable.
-  void Protect();
-  void Unprotect();
-#endif
-
   // Allocates and initializes a new JavaScript object based on a
   // constructor.
   // Returns Failure::RetryAfterGC(requested_bytes, space) if the allocation
@@ -1052,10 +1046,8 @@ class Heap {
   void ZapFromSpace();
 #endif
 
-#if defined(ENABLE_LOGGING_AND_PROFILING)
   // Print short heap statistics.
   void PrintShortHeapStatistics();
-#endif
 
   // Makes a new symbol object
   // Returns Failure::RetryAfterGC(requested_bytes, space) if the allocation
@@ -1514,11 +1506,9 @@ class Heap {
   // around a GC).
   inline void CompletelyClearInstanceofCache();
 
-#if defined(DEBUG) || defined(ENABLE_LOGGING_AND_PROFILING)
   // Record statistics before and after garbage collection.
   void ReportStatisticsBeforeGC();
   void ReportStatisticsAfterGC();
-#endif
 
   // Slow part of scavenge object.
   static void ScavengeObjectSlow(HeapObject** p, HeapObject* object);
diff --git a/deps/v8/src/hydrogen-instructions.cc b/deps/v8/src/hydrogen-instructions.cc
index e28b9efd8f..50f2f6df6c 100644
--- a/deps/v8/src/hydrogen-instructions.cc
+++ b/deps/v8/src/hydrogen-instructions.cc
@@ -784,6 +784,21 @@ void HChange::PrintDataTo(StringStream* stream) {
 }
 
 
+HValue* HCheckInstanceType::Canonicalize() {
+  if (check_ == IS_STRING &&
+      !value()->type().IsUninitialized() &&
+      value()->type().IsString()) {
+    return NULL;
+  }
+  if (check_ == IS_SYMBOL &&
+      value()->IsConstant() &&
+      HConstant::cast(value())->handle()->IsSymbol()) {
+    return NULL;
+  }
+  return this;
+}
+
+
 void HCheckInstanceType::GetCheckInterval(InstanceType* first,
                                           InstanceType* last) {
   ASSERT(is_interval_check());
diff --git a/deps/v8/src/hydrogen-instructions.h b/deps/v8/src/hydrogen-instructions.h
index cc32b93831..401c2e4a03 100644
--- a/deps/v8/src/hydrogen-instructions.h
+++ b/deps/v8/src/hydrogen-instructions.h
@@ -2003,14 +2003,7 @@ class HCheckInstanceType: public HUnaryOperation {
   virtual void Verify();
 #endif
 
-  virtual HValue* Canonicalize() {
-    if (!value()->type().IsUninitialized() &&
-        value()->type().IsString() &&
-        check_ == IS_STRING) {
-      return NULL;
-    }
-    return this;
-  }
+  virtual HValue* Canonicalize();
 
   bool is_interval_check() const { return check_ <= LAST_INTERVAL_CHECK; }
   void GetCheckInterval(InstanceType* first, InstanceType* last);
@@ -3362,8 +3355,9 @@ class HLoadContextSlot: public HUnaryOperation {
 
 
 static inline bool StoringValueNeedsWriteBarrier(HValue* value) {
-  return !value->type().IsSmi() &&
-      !(value->IsConstant() && HConstant::cast(value)->InOldSpace());
+  return !value->type().IsBoolean()
+      && !value->type().IsSmi()
+      && !(value->IsConstant() && HConstant::cast(value)->InOldSpace());
 }
 
 
diff --git a/deps/v8/src/ia32/code-stubs-ia32.cc b/deps/v8/src/ia32/code-stubs-ia32.cc
index e3eb122bc6..48bd8b1a57 100644
--- a/deps/v8/src/ia32/code-stubs-ia32.cc
+++ b/deps/v8/src/ia32/code-stubs-ia32.cc
@@ -511,25 +511,17 @@ static void IntegerConvert(MacroAssembler* masm,
 }
 
 
-const char* UnaryOpStub::GetName() {
-  if (name_ != NULL) return name_;
-  const int kMaxNameLength = 100;
-  name_ = Isolate::Current()->bootstrapper()->AllocateAutoDeletedArray(
-      kMaxNameLength);
-  if (name_ == NULL) return "OOM";
+void UnaryOpStub::PrintName(StringStream* stream) {
   const char* op_name = Token::Name(op_);
   const char* overwrite_name = NULL;  // Make g++ happy.
   switch (mode_) {
     case UNARY_NO_OVERWRITE: overwrite_name = "Alloc"; break;
     case UNARY_OVERWRITE: overwrite_name = "Overwrite"; break;
   }
-
-  OS::SNPrintF(Vector<char>(name_, kMaxNameLength),
-               "UnaryOpStub_%s_%s_%s",
-               op_name,
-               overwrite_name,
-               UnaryOpIC::GetName(operand_type_));
-  return name_;
+  stream->Add("UnaryOpStub_%s_%s_%s",
+              op_name,
+              overwrite_name,
+              UnaryOpIC::GetName(operand_type_));
 }
 
 
@@ -914,12 +906,7 @@ void BinaryOpStub::Generate(MacroAssembler* masm) {
 }
 
 
-const char* BinaryOpStub::GetName() {
-  if (name_ != NULL) return name_;
-  const int kMaxNameLength = 100;
-  name_ = Isolate::Current()->bootstrapper()->AllocateAutoDeletedArray(
-      kMaxNameLength);
-  if (name_ == NULL) return "OOM";
+void BinaryOpStub::PrintName(StringStream* stream) {
   const char* op_name = Token::Name(op_);
   const char* overwrite_name;
   switch (mode_) {
@@ -928,13 +915,10 @@ const char* BinaryOpStub::GetName() {
     case OVERWRITE_LEFT: overwrite_name = "OverwriteLeft"; break;
     default: overwrite_name = "UnknownOverwrite"; break;
   }
-
-  OS::SNPrintF(Vector<char>(name_, kMaxNameLength),
-               "BinaryOpStub_%s_%s_%s",
-               op_name,
-               overwrite_name,
-               BinaryOpIC::GetName(operands_type_));
-  return name_;
+  stream->Add("BinaryOpStub_%s_%s_%s",
+              op_name,
+              overwrite_name,
+              BinaryOpIC::GetName(operands_type_));
 }
 
 
@@ -4380,9 +4364,7 @@ void CEntryStub::Generate(MacroAssembler* masm) {
 
 void JSEntryStub::GenerateBody(MacroAssembler* masm, bool is_construct) {
   Label invoke, exit;
-#ifdef ENABLE_LOGGING_AND_PROFILING
   Label not_outermost_js, not_outermost_js_2;
-#endif
 
   // Setup frame.
   __ push(ebp);
@@ -4401,7 +4383,6 @@ void JSEntryStub::GenerateBody(MacroAssembler* masm, bool is_construct) {
   ExternalReference c_entry_fp(Isolate::k_c_entry_fp_address, masm->isolate());
   __ push(Operand::StaticVariable(c_entry_fp));
 
-#ifdef ENABLE_LOGGING_AND_PROFILING
   // If this is the outermost JS call, set js_entry_sp value.
   ExternalReference js_entry_sp(Isolate::k_js_entry_sp_address,
                                 masm->isolate());
@@ -4414,7 +4395,6 @@ void JSEntryStub::GenerateBody(MacroAssembler* masm, bool is_construct) {
   __ bind(&not_outermost_js);
   __ push(Immediate(Smi::FromInt(StackFrame::INNER_JSENTRY_FRAME)));
   __ bind(&cont);
-#endif
 
   // Call a faked try-block that does the invoke.
   __ call(&invoke);
@@ -4462,7 +4442,6 @@ void JSEntryStub::GenerateBody(MacroAssembler* masm, bool is_construct) {
   __ PopTryHandler();
 
   __ bind(&exit);
-#ifdef ENABLE_LOGGING_AND_PROFILING
   // Check if the current stack frame is marked as the outermost JS frame.
   __ pop(ebx);
   __ cmp(Operand(ebx),
@@ -4470,7 +4449,6 @@ void JSEntryStub::GenerateBody(MacroAssembler* masm, bool is_construct) {
   __ j(not_equal, &not_outermost_js_2);
   __ mov(Operand::StaticVariable(js_entry_sp), Immediate(0));
   __ bind(&not_outermost_js_2);
-#endif
 
   // Restore the top frame descriptor from the stack.
   __ pop(Operand::StaticVariable(ExternalReference(
@@ -4732,15 +4710,8 @@ int CompareStub::MinorKey() {
 
 // Unfortunately you have to run without snapshots to see most of these
 // names in the profile since most compare stubs end up in the snapshot.
-const char* CompareStub::GetName() {
+void CompareStub::PrintName(StringStream* stream) {
   ASSERT(lhs_.is(no_reg) && rhs_.is(no_reg));
-
-  if (name_ != NULL) return name_;
-  const int kMaxNameLength = 100;
-  name_ = Isolate::Current()->bootstrapper()->AllocateAutoDeletedArray(
-      kMaxNameLength);
-  if (name_ == NULL) return "OOM";
-
   const char* cc_name;
   switch (cc_) {
     case less: cc_name = "LT"; break;
@@ -4751,35 +4722,12 @@ const char* CompareStub::GetName() {
     case not_equal: cc_name = "NE"; break;
     default: cc_name = "UnknownCondition"; break;
   }
-
-  const char* strict_name = "";
-  if (strict_ && (cc_ == equal || cc_ == not_equal)) {
-    strict_name = "_STRICT";
-  }
-
-  const char* never_nan_nan_name = "";
-  if (never_nan_nan_ && (cc_ == equal || cc_ == not_equal)) {
-    never_nan_nan_name = "_NO_NAN";
-  }
-
-  const char* include_number_compare_name = "";
-  if (!include_number_compare_) {
-    include_number_compare_name = "_NO_NUMBER";
-  }
-
-  const char* include_smi_compare_name = "";
-  if (!include_smi_compare_) {
-    include_smi_compare_name = "_NO_SMI";
-  }
-
-  OS::SNPrintF(Vector<char>(name_, kMaxNameLength),
-               "CompareStub_%s%s%s%s%s",
-               cc_name,
-               strict_name,
-               never_nan_nan_name,
-               include_number_compare_name,
-               include_smi_compare_name);
-  return name_;
+  bool is_equality = cc_ == equal || cc_ == not_equal;
+  stream->Add("CompareStub_%s", cc_name);
+  if (strict_ && is_equality) stream->Add("_STRICT");
+  if (never_nan_nan_ && is_equality) stream->Add("_NO_NAN");
+  if (!include_number_compare_) stream->Add("_NO_NUMBER");
+  if (!include_smi_compare_) stream->Add("_NO_SMI");
 }
 
 
diff --git a/deps/v8/src/ia32/code-stubs-ia32.h b/deps/v8/src/ia32/code-stubs-ia32.h
index d02aa01d7b..fa255da1fd 100644
--- a/deps/v8/src/ia32/code-stubs-ia32.h
+++ b/deps/v8/src/ia32/code-stubs-ia32.h
@@ -67,8 +67,7 @@ class UnaryOpStub: public CodeStub {
               UnaryOpIC::TypeInfo operand_type = UnaryOpIC::UNINITIALIZED)
       : op_(op),
         mode_(mode),
-        operand_type_(operand_type),
-        name_(NULL) {
+        operand_type_(operand_type) {
   }
 
  private:
@@ -78,19 +77,7 @@ class UnaryOpStub: public CodeStub {
   // Operand type information determined at runtime.
   UnaryOpIC::TypeInfo operand_type_;
 
-  char* name_;
-
-  const char* GetName();
-
-#ifdef DEBUG
-  void Print() {
-    PrintF("UnaryOpStub %d (op %s), (mode %d, runtime_type_info %s)\n",
-           MinorKey(),
-           Token::String(op_),
-           static_cast<int>(mode_),
-           UnaryOpIC::GetName(operand_type_));
-  }
-#endif
+  virtual void PrintName(StringStream* stream);
 
   class ModeBits: public BitField<UnaryOverwriteMode, 0, 1> {};
   class OpBits: public BitField<Token::Value, 1, 7> {};
@@ -153,8 +140,7 @@ class BinaryOpStub: public CodeStub {
       : op_(op),
         mode_(mode),
         operands_type_(BinaryOpIC::UNINITIALIZED),
-        result_type_(BinaryOpIC::UNINITIALIZED),
-        name_(NULL) {
+        result_type_(BinaryOpIC::UNINITIALIZED) {
     use_sse3_ = CpuFeatures::IsSupported(SSE3);
     ASSERT(OpBits::is_valid(Token::NUM_TOKENS));
   }
@@ -167,8 +153,7 @@ class BinaryOpStub: public CodeStub {
         mode_(ModeBits::decode(key)),
         use_sse3_(SSE3Bits::decode(key)),
         operands_type_(operands_type),
-        result_type_(result_type),
-        name_(NULL) { }
+        result_type_(result_type) { }
 
  private:
   enum SmiCodeGenerateHeapNumberResults {
@@ -184,20 +169,7 @@ class BinaryOpStub: public CodeStub {
   BinaryOpIC::TypeInfo operands_type_;
   BinaryOpIC::TypeInfo result_type_;
 
-  char* name_;
-
-  const char* GetName();
-
-#ifdef DEBUG
-  void Print() {
-    PrintF("BinaryOpStub %d (op %s), "
-           "(mode %d, runtime_type_info %s)\n",
-           MinorKey(),
-           Token::String(op_),
-           static_cast<int>(mode_),
-           BinaryOpIC::GetName(operands_type_));
-  }
-#endif
+  virtual void PrintName(StringStream* stream);
 
   // Minor key encoding in 16 bits RRRTTTSOOOOOOOMM.
   class ModeBits: public BitField<OverwriteMode, 0, 2> {};
@@ -415,14 +387,6 @@ class NumberToStringStub: public CodeStub {
   int MinorKey() { return 0; }
 
   void Generate(MacroAssembler* masm);
-
-  const char* GetName() { return "NumberToStringStub"; }
-
-#ifdef DEBUG
-  void Print() {
-    PrintF("NumberToStringStub\n");
-  }
-#endif
 };
 
 
@@ -466,13 +430,6 @@ class StringDictionaryLookupStub: public CodeStub {
       StringDictionary::kHeaderSize +
       StringDictionary::kElementsStartIndex * kPointerSize;
 
-
-#ifdef DEBUG
-  void Print() {
-    PrintF("StringDictionaryLookupStub\n");
-  }
-#endif
-
   Major MajorKey() { return StringDictionaryNegativeLookup; }
 
   int MinorKey() {
diff --git a/deps/v8/src/ia32/codegen-ia32.h b/deps/v8/src/ia32/codegen-ia32.h
index 8f090b124e..c85fa83e9e 100644
--- a/deps/v8/src/ia32/codegen-ia32.h
+++ b/deps/v8/src/ia32/codegen-ia32.h
@@ -53,9 +53,7 @@ class CodeGenerator {
   // Print the code after compiling it.
   static void PrintCode(Handle<Code> code, CompilationInfo* info);
 
-#ifdef ENABLE_LOGGING_AND_PROFILING
   static bool ShouldGenerateLog(Expression* type);
-#endif
 
   static bool RecordPositions(MacroAssembler* masm,
                               int pos,
diff --git a/deps/v8/src/ia32/full-codegen-ia32.cc b/deps/v8/src/ia32/full-codegen-ia32.cc
index 75cc4b8608..f9f63a70ed 100644
--- a/deps/v8/src/ia32/full-codegen-ia32.cc
+++ b/deps/v8/src/ia32/full-codegen-ia32.cc
@@ -744,7 +744,7 @@ void FullCodeGenerator::EmitDeclaration(Variable* variable,
       // IDs for bailouts from optimized code.
       ASSERT(prop->obj()->AsVariableProxy() != NULL);
       { AccumulatorValueContext for_object(this);
-        EmitVariableLoad(prop->obj()->AsVariableProxy()->var());
+        EmitVariableLoad(prop->obj()->AsVariableProxy());
       }
 
       __ push(eax);
@@ -1064,7 +1064,7 @@ void FullCodeGenerator::EmitNewClosure(Handle<SharedFunctionInfo> info,
 
 void FullCodeGenerator::VisitVariableProxy(VariableProxy* expr) {
   Comment cmnt(masm_, "[ VariableProxy");
-  EmitVariableLoad(expr->var());
+  EmitVariableLoad(expr);
 }
 
 
@@ -1214,7 +1214,11 @@ void FullCodeGenerator::EmitDynamicLoadFromSlotFastCase(
 }
 
 
-void FullCodeGenerator::EmitVariableLoad(Variable* var) {
+void FullCodeGenerator::EmitVariableLoad(VariableProxy* proxy) {
+  // Record position before possible IC call.
+  SetSourcePosition(proxy->position());
+  Variable* var = proxy->var();
+
   // Three cases: non-this global variables, lookup slots, and all other
   // types of slots.
   Slot* slot = var->AsSlot();
@@ -1540,7 +1544,7 @@ void FullCodeGenerator::VisitAssignment(Assignment* expr) {
     { AccumulatorValueContext context(this);
       switch (assign_type) {
         case VARIABLE:
-          EmitVariableLoad(expr->target()->AsVariableProxy()->var());
+          EmitVariableLoad(expr->target()->AsVariableProxy());
           PrepareForBailout(expr->target(), TOS_REG);
           break;
         case NAMED_PROPERTY:
@@ -1769,7 +1773,7 @@ void FullCodeGenerator::EmitAssignment(Expression* expr, int bailout_ast_id) {
         ASSERT(prop->obj()->AsVariableProxy() != NULL);
         ASSERT(prop->key()->AsLiteral() != NULL);
         { AccumulatorValueContext for_object(this);
-          EmitVariableLoad(prop->obj()->AsVariableProxy()->var());
+          EmitVariableLoad(prop->obj()->AsVariableProxy());
         }
         __ mov(edx, eax);
         __ SafeSet(ecx, Immediate(prop->key()->AsLiteral()->handle()));
@@ -2701,13 +2705,11 @@ void FullCodeGenerator::EmitLog(ZoneList<Expression*>* args) {
   //     with '%2s' (see Logger::LogRuntime for all the formats).
   //   2 (array): Arguments to the format string.
   ASSERT_EQ(args->length(), 3);
-#ifdef ENABLE_LOGGING_AND_PROFILING
   if (CodeGenerator::ShouldGenerateLog(args->at(0))) {
     VisitForStackValue(args->at(1));
     VisitForStackValue(args->at(2));
     __ CallRuntime(Runtime::kLog, 2);
   }
-#endif
   // Finally, we're expected to leave a value on the top of the stack.
   __ mov(eax, isolate()->factory()->undefined_value());
   context()->Plug(eax);
@@ -3768,7 +3770,7 @@ void FullCodeGenerator::VisitCountOperation(CountOperation* expr) {
   if (assign_type == VARIABLE) {
     ASSERT(expr->expression()->AsVariableProxy()->var() != NULL);
     AccumulatorValueContext context(this);
-    EmitVariableLoad(expr->expression()->AsVariableProxy()->var());
+    EmitVariableLoad(expr->expression()->AsVariableProxy());
   } else {
     // Reserve space for result of postfix operation.
     if (expr->is_postfix() && !context()->IsEffect()) {
diff --git a/deps/v8/src/ia32/ic-ia32.cc b/deps/v8/src/ia32/ic-ia32.cc
index be5910a124..5f143b104f 100644
--- a/deps/v8/src/ia32/ic-ia32.cc
+++ b/deps/v8/src/ia32/ic-ia32.cc
@@ -216,105 +216,6 @@ static void GenerateDictionaryStore(MacroAssembler* masm,
 }
 
 
-static void GenerateNumberDictionaryLoad(MacroAssembler* masm,
-                                         Label* miss,
-                                         Register elements,
-                                         Register key,
-                                         Register r0,
-                                         Register r1,
-                                         Register r2,
-                                         Register result) {
-  // Register use:
-  //
-  // elements - holds the slow-case elements of the receiver and is unchanged.
-  //
-  // key      - holds the smi key on entry and is unchanged.
-  //
-  // Scratch registers:
-  //
-  // r0 - holds the untagged key on entry and holds the hash once computed.
-  //
-  // r1 - used to hold the capacity mask of the dictionary
-  //
-  // r2 - used for the index into the dictionary.
-  //
-  // result - holds the result on exit if the load succeeds and we fall through.
-
-  Label done;
-
-  // Compute the hash code from the untagged key.  This must be kept in sync
-  // with ComputeIntegerHash in utils.h.
-  //
-  // hash = ~hash + (hash << 15);
-  __ mov(r1, r0);
-  __ not_(r0);
-  __ shl(r1, 15);
-  __ add(r0, Operand(r1));
-  // hash = hash ^ (hash >> 12);
-  __ mov(r1, r0);
-  __ shr(r1, 12);
-  __ xor_(r0, Operand(r1));
-  // hash = hash + (hash << 2);
-  __ lea(r0, Operand(r0, r0, times_4, 0));
-  // hash = hash ^ (hash >> 4);
-  __ mov(r1, r0);
-  __ shr(r1, 4);
-  __ xor_(r0, Operand(r1));
-  // hash = hash * 2057;
-  __ imul(r0, r0, 2057);
-  // hash = hash ^ (hash >> 16);
-  __ mov(r1, r0);
-  __ shr(r1, 16);
-  __ xor_(r0, Operand(r1));
-
-  // Compute capacity mask.
-  __ mov(r1, FieldOperand(elements, NumberDictionary::kCapacityOffset));
-  __ shr(r1, kSmiTagSize);  // convert smi to int
-  __ dec(r1);
-
-  // Generate an unrolled loop that performs a few probes before giving up.
-  const int kProbes = 4;
-  for (int i = 0; i < kProbes; i++) {
-    // Use r2 for index calculations and keep the hash intact in r0.
-    __ mov(r2, r0);
-    // Compute the masked index: (hash + i + i * i) & mask.
-    if (i > 0) {
-      __ add(Operand(r2), Immediate(NumberDictionary::GetProbeOffset(i)));
-    }
-    __ and_(r2, Operand(r1));
-
-    // Scale the index by multiplying by the entry size.
-    ASSERT(NumberDictionary::kEntrySize == 3);
-    __ lea(r2, Operand(r2, r2, times_2, 0));  // r2 = r2 * 3
-
-    // Check if the key matches.
-    __ cmp(key, FieldOperand(elements,
-                             r2,
-                             times_pointer_size,
-                             NumberDictionary::kElementsStartOffset));
-    if (i != (kProbes - 1)) {
-      __ j(equal, &done);
-    } else {
-      __ j(not_equal, miss);
-    }
-  }
-
-  __ bind(&done);
-  // Check that the value is a normal propety.
-  const int kDetailsOffset =
-      NumberDictionary::kElementsStartOffset + 2 * kPointerSize;
-  ASSERT_EQ(NORMAL, 0);
-  __ test(FieldOperand(elements, r2, times_pointer_size, kDetailsOffset),
-          Immediate(PropertyDetails::TypeField::mask() << kSmiTagSize));
-  __ j(not_zero, miss);
-
-  // Get the value at the masked, scaled index.
-  const int kValueOffset =
-      NumberDictionary::kElementsStartOffset + kPointerSize;
-  __ mov(result, FieldOperand(elements, r2, times_pointer_size, kValueOffset));
-}
-
-
 void LoadIC::GenerateArrayLength(MacroAssembler* masm) {
   // ----------- S t a t e -------------
   //  -- eax    : receiver
@@ -591,14 +492,13 @@ void KeyedLoadIC::GenerateGeneric(MacroAssembler* masm) {
   // Push receiver on the stack to free up a register for the dictionary
   // probing.
   __ push(edx);
-  GenerateNumberDictionaryLoad(masm,
-                               &slow_pop_receiver,
-                               ecx,
-                               eax,
-                               ebx,
-                               edx,
-                               edi,
-                               eax);
+  __ LoadFromNumberDictionary(&slow_pop_receiver,
+                              ecx,
+                              eax,
+                              ebx,
+                              edx,
+                              edi,
+                              eax);
   // Pop receiver before returning.
   __ pop(edx);
   __ ret(0);
@@ -1200,8 +1100,8 @@ void KeyedCallIC::GenerateMegamorphic(MacroAssembler* masm, int argc) {
   __ SmiUntag(ebx);
   // ebx: untagged index
   // Receiver in edx will be clobbered, need to reload it on miss.
-  GenerateNumberDictionaryLoad(
-      masm, &slow_reload_receiver, eax, ecx, ebx, edx, edi, edi);
+  __ LoadFromNumberDictionary(
+      &slow_reload_receiver, eax, ecx, ebx, edx, edi, edi);
   __ IncrementCounter(counters->keyed_call_generic_smi_dict(), 1);
   __ jmp(&do_call);
 
diff --git a/deps/v8/src/ia32/lithium-codegen-ia32.cc b/deps/v8/src/ia32/lithium-codegen-ia32.cc
index 2f1b88e789..6293718f62 100644
--- a/deps/v8/src/ia32/lithium-codegen-ia32.cc
+++ b/deps/v8/src/ia32/lithium-codegen-ia32.cc
@@ -1345,6 +1345,7 @@ void LCodeGen::DoArithmeticT(LArithmeticT* instr) {
 
   BinaryOpStub stub(instr->op(), NO_OVERWRITE);
   CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr);
+  __ nop();  // Signals no inlined code.
 }
 
 
diff --git a/deps/v8/src/ia32/lithium-gap-resolver-ia32.cc b/deps/v8/src/ia32/lithium-gap-resolver-ia32.cc
index 9d91c61840..fcf1f91378 100644
--- a/deps/v8/src/ia32/lithium-gap-resolver-ia32.cc
+++ b/deps/v8/src/ia32/lithium-gap-resolver-ia32.cc
@@ -305,8 +305,13 @@ void LGapResolver::EmitMove(int index) {
   } else if (source->IsConstantOperand()) {
     ASSERT(destination->IsRegister() || destination->IsStackSlot());
     Immediate src = cgen_->ToImmediate(source);
-    Operand dst = cgen_->ToOperand(destination);
-    __ mov(dst, src);
+    if (destination->IsRegister()) {
+      Register dst = cgen_->ToRegister(destination);
+      __ Set(dst, src);
+    } else {
+      Operand dst = cgen_->ToOperand(destination);
+      __ Set(dst, src);
+    }
 
   } else if (source->IsDoubleRegister()) {
     XMMRegister src = cgen_->ToDoubleRegister(source);
diff --git a/deps/v8/src/ia32/macro-assembler-ia32.cc b/deps/v8/src/ia32/macro-assembler-ia32.cc
index 020acded7d..136b24c981 100644
--- a/deps/v8/src/ia32/macro-assembler-ia32.cc
+++ b/deps/v8/src/ia32/macro-assembler-ia32.cc
@@ -734,6 +734,104 @@ void MacroAssembler::CheckAccessGlobalProxy(Register holder_reg,
 }
 
 
+void MacroAssembler::LoadFromNumberDictionary(Label* miss,
+                                              Register elements,
+                                              Register key,
+                                              Register r0,
+                                              Register r1,
+                                              Register r2,
+                                              Register result) {
+  // Register use:
+  //
+  // elements - holds the slow-case elements of the receiver and is unchanged.
+  //
+  // key      - holds the smi key on entry and is unchanged.
+  //
+  // Scratch registers:
+  //
+  // r0 - holds the untagged key on entry and holds the hash once computed.
+  //
+  // r1 - used to hold the capacity mask of the dictionary
+  //
+  // r2 - used for the index into the dictionary.
+  //
+  // result - holds the result on exit if the load succeeds and we fall through.
+
+  Label done;
+
+  // Compute the hash code from the untagged key.  This must be kept in sync
+  // with ComputeIntegerHash in utils.h.
+  //
+  // hash = ~hash + (hash << 15);
+  mov(r1, r0);
+  not_(r0);
+  shl(r1, 15);
+  add(r0, Operand(r1));
+  // hash = hash ^ (hash >> 12);
+  mov(r1, r0);
+  shr(r1, 12);
+  xor_(r0, Operand(r1));
+  // hash = hash + (hash << 2);
+  lea(r0, Operand(r0, r0, times_4, 0));
+  // hash = hash ^ (hash >> 4);
+  mov(r1, r0);
+  shr(r1, 4);
+  xor_(r0, Operand(r1));
+  // hash = hash * 2057;
+  imul(r0, r0, 2057);
+  // hash = hash ^ (hash >> 16);
+  mov(r1, r0);
+  shr(r1, 16);
+  xor_(r0, Operand(r1));
+
+  // Compute capacity mask.
+  mov(r1, FieldOperand(elements, NumberDictionary::kCapacityOffset));
+  shr(r1, kSmiTagSize);  // convert smi to int
+  dec(r1);
+
+  // Generate an unrolled loop that performs a few probes before giving up.
+  const int kProbes = 4;
+  for (int i = 0; i < kProbes; i++) {
+    // Use r2 for index calculations and keep the hash intact in r0.
+    mov(r2, r0);
+    // Compute the masked index: (hash + i + i * i) & mask.
+    if (i > 0) {
+      add(Operand(r2), Immediate(NumberDictionary::GetProbeOffset(i)));
+    }
+    and_(r2, Operand(r1));
+
+    // Scale the index by multiplying by the entry size.
+    ASSERT(NumberDictionary::kEntrySize == 3);
+    lea(r2, Operand(r2, r2, times_2, 0));  // r2 = r2 * 3
+
+    // Check if the key matches.
+    cmp(key, FieldOperand(elements,
+                          r2,
+                          times_pointer_size,
+                          NumberDictionary::kElementsStartOffset));
+    if (i != (kProbes - 1)) {
+      j(equal, &done);
+    } else {
+      j(not_equal, miss);
+    }
+  }
+
+  bind(&done);
+  // Check that the value is a normal propety.
+  const int kDetailsOffset =
+      NumberDictionary::kElementsStartOffset + 2 * kPointerSize;
+  ASSERT_EQ(NORMAL, 0);
+  test(FieldOperand(elements, r2, times_pointer_size, kDetailsOffset),
+       Immediate(PropertyDetails::TypeField::mask() << kSmiTagSize));
+  j(not_zero, miss);
+
+  // Get the value at the masked, scaled index.
+  const int kValueOffset =
+      NumberDictionary::kElementsStartOffset + kPointerSize;
+  mov(result, FieldOperand(elements, r2, times_pointer_size, kValueOffset));
+}
+
+
 void MacroAssembler::LoadAllocationTopHelper(Register result,
                                              Register scratch,
                                              AllocationFlags flags) {
diff --git a/deps/v8/src/ia32/macro-assembler-ia32.h b/deps/v8/src/ia32/macro-assembler-ia32.h
index 837c500e9a..dac22731a9 100644
--- a/deps/v8/src/ia32/macro-assembler-ia32.h
+++ b/deps/v8/src/ia32/macro-assembler-ia32.h
@@ -352,6 +352,15 @@ class MacroAssembler: public Assembler {
                               Label* miss);
 
 
+  void LoadFromNumberDictionary(Label* miss,
+                                Register elements,
+                                Register key,
+                                Register r0,
+                                Register r1,
+                                Register r2,
+                                Register result);
+
+
   // ---------------------------------------------------------------------------
   // Allocation support
 
diff --git a/deps/v8/src/ia32/regexp-macro-assembler-ia32.h b/deps/v8/src/ia32/regexp-macro-assembler-ia32.h
index 21c86d050a..d504470280 100644
--- a/deps/v8/src/ia32/regexp-macro-assembler-ia32.h
+++ b/deps/v8/src/ia32/regexp-macro-assembler-ia32.h
@@ -28,6 +28,9 @@
 #ifndef V8_IA32_REGEXP_MACRO_ASSEMBLER_IA32_H_
 #define V8_IA32_REGEXP_MACRO_ASSEMBLER_IA32_H_
 
+#include "ia32/assembler-ia32.h"
+#include "ia32/assembler-ia32-inl.h"
+
 namespace v8 {
 namespace internal {
 
diff --git a/deps/v8/src/ia32/stub-cache-ia32.cc b/deps/v8/src/ia32/stub-cache-ia32.cc
index e53cc0839b..2660850889 100644
--- a/deps/v8/src/ia32/stub-cache-ia32.cc
+++ b/deps/v8/src/ia32/stub-cache-ia32.cc
@@ -2679,7 +2679,10 @@ MaybeObject* KeyedStoreStubCompiler::CompileStoreElement(Map* receiver_map) {
   //  -- esp[0] : return address
   // -----------------------------------
   Code* stub;
-  MaybeObject* maybe_stub = ComputeSharedKeyedStoreElementStub(receiver_map);
+  JSObject::ElementsKind elements_kind = receiver_map->elements_kind();
+  bool is_jsarray = receiver_map->instance_type() == JS_ARRAY_TYPE;
+  MaybeObject* maybe_stub =
+      KeyedStoreElementStub(is_jsarray, elements_kind).TryGetCode();
   if (!maybe_stub->To(&stub)) return maybe_stub;
   __ DispatchMap(edx,
                  Handle<Map>(receiver_map),
@@ -3137,7 +3140,8 @@ MaybeObject* KeyedLoadStubCompiler::CompileLoadElement(Map* receiver_map) {
   //  -- esp[0] : return address
   // -----------------------------------
   Code* stub;
-  MaybeObject* maybe_stub = ComputeSharedKeyedLoadElementStub(receiver_map);
+  JSObject::ElementsKind elements_kind = receiver_map->elements_kind();
+  MaybeObject* maybe_stub = KeyedLoadElementStub(elements_kind).TryGetCode();
   if (!maybe_stub->To(&stub)) return maybe_stub;
   __ DispatchMap(edx,
                  Handle<Map>(receiver_map),
@@ -3321,6 +3325,64 @@ MaybeObject* ConstructStubCompiler::CompileConstructStub(JSFunction* function) {
 #define __ ACCESS_MASM(masm)
 
 
+void KeyedLoadStubCompiler::GenerateLoadDictionaryElement(
+    MacroAssembler* masm) {
+  // ----------- S t a t e -------------
+  //  -- eax    : key
+  //  -- edx    : receiver
+  //  -- esp[0] : return address
+  // -----------------------------------
+  Label slow, miss_force_generic;
+
+  // This stub is meant to be tail-jumped to, the receiver must already
+  // have been verified by the caller to not be a smi.
+  __ JumpIfNotSmi(eax, &miss_force_generic);
+  __ mov(ebx, eax);
+  __ SmiUntag(ebx);
+  __ mov(ecx, FieldOperand(edx, JSObject::kElementsOffset));
+
+  // Push receiver on the stack to free up a register for the dictionary
+  // probing.
+  __ push(edx);
+  __ LoadFromNumberDictionary(&slow,
+                              ecx,
+                              eax,
+                              ebx,
+                              edx,
+                              edi,
+                              eax);
+  // Pop receiver before returning.
+  __ pop(edx);
+  __ ret(0);
+
+  __ bind(&slow);
+  __ pop(edx);
+
+  // ----------- S t a t e -------------
+  //  -- eax    : value
+  //  -- ecx    : key
+  //  -- edx    : receiver
+  //  -- esp[0] : return address
+  // -----------------------------------
+
+  Handle<Code> slow_ic =
+      masm->isolate()->builtins()->KeyedLoadIC_Slow();
+  __ jmp(slow_ic, RelocInfo::CODE_TARGET);
+
+  __ bind(&miss_force_generic);
+  // ----------- S t a t e -------------
+  //  -- eax    : value
+  //  -- ecx    : key
+  //  -- edx    : receiver
+  //  -- esp[0] : return address
+  // -----------------------------------
+
+  Handle<Code> miss_force_generic_ic =
+      masm->isolate()->builtins()->KeyedLoadIC_MissForceGeneric();
+  __ jmp(miss_force_generic_ic, RelocInfo::CODE_TARGET);
+}
+
+
 void KeyedLoadStubCompiler::GenerateLoadExternalArray(
     MacroAssembler* masm,
     JSObject::ElementsKind elements_kind) {
@@ -3731,7 +3793,8 @@ void KeyedLoadStubCompiler::GenerateLoadFastElement(MacroAssembler* masm) {
 void KeyedStoreStubCompiler::GenerateStoreFastElement(MacroAssembler* masm,
                                                       bool is_js_array) {
   // ----------- S t a t e -------------
-  //  -- eax    : key
+  //  -- eax    : value
+  //  -- ecx    : key
   //  -- edx    : receiver
   //  -- esp[0] : return address
   // -----------------------------------
diff --git a/deps/v8/src/ic.cc b/deps/v8/src/ic.cc
index eb0f12a394..f70f75a7f6 100644
--- a/deps/v8/src/ic.cc
+++ b/deps/v8/src/ic.cc
@@ -1097,15 +1097,10 @@ void LoadIC::UpdateCaches(LookupResult* lookup,
 }
 
 
-MaybeObject* KeyedLoadIC::GetFastElementStubWithoutMapCheck(
-    bool is_js_array) {
-  return KeyedLoadFastElementStub().TryGetCode();
-}
-
-
-MaybeObject* KeyedLoadIC::GetExternalArrayStubWithoutMapCheck(
+MaybeObject* KeyedLoadIC::GetElementStubWithoutMapCheck(
+    bool is_js_array,
     JSObject::ElementsKind elements_kind) {
-  return KeyedLoadExternalArrayStub(elements_kind).TryGetCode();
+  return KeyedLoadElementStub(elements_kind).TryGetCode();
 }
 
 
@@ -1675,7 +1670,7 @@ MaybeObject* KeyedIC::ComputeStub(JSObject* receiver,
   for (int i = 0; i < target_receiver_maps.length(); ++i) {
     Map* receiver_map(target_receiver_maps.at(i));
     MaybeObject* maybe_cached_stub = ComputeMonomorphicStubWithoutMapCheck(
-        receiver_map, strict_mode, generic_stub);
+        receiver_map, strict_mode);
     Code* cached_stub;
     if (!maybe_cached_stub->To(&cached_stub)) return maybe_cached_stub;
     handler_ics.Add(cached_stub);
@@ -1694,18 +1689,18 @@ MaybeObject* KeyedIC::ComputeStub(JSObject* receiver,
 
 MaybeObject* KeyedIC::ComputeMonomorphicStubWithoutMapCheck(
     Map* receiver_map,
-    StrictModeFlag strict_mode,
-    Code* generic_stub) {
+    StrictModeFlag strict_mode) {
   if ((receiver_map->instance_type() & kNotStringTag) == 0) {
     ASSERT(string_stub() != NULL);
     return string_stub();
-  } else if (receiver_map->has_external_array_elements()) {
-    return GetExternalArrayStubWithoutMapCheck(receiver_map->elements_kind());
-  } else if (receiver_map->has_fast_elements()) {
-    bool is_js_array = receiver_map->instance_type() == JS_ARRAY_TYPE;
-    return GetFastElementStubWithoutMapCheck(is_js_array);
   } else {
-    return generic_stub;
+    ASSERT(receiver_map->has_dictionary_elements() ||
+           receiver_map->has_fast_elements() ||
+           receiver_map->has_fast_double_elements() ||
+           receiver_map->has_external_array_elements());
+    bool is_js_array = receiver_map->instance_type() == JS_ARRAY_TYPE;
+    return GetElementStubWithoutMapCheck(is_js_array,
+                                         receiver_map->elements_kind());
   }
 }
 
@@ -1717,6 +1712,7 @@ MaybeObject* KeyedIC::ComputeMonomorphicStub(JSObject* receiver,
   Code* result = NULL;
   if (receiver->HasFastElements() ||
       receiver->HasExternalArrayElements() ||
+      receiver->HasFastDoubleElements() ||
       receiver->HasDictionaryElements()) {
     MaybeObject* maybe_stub =
         isolate()->stub_cache()->ComputeKeyedLoadOrStoreElement(
@@ -1729,15 +1725,10 @@ MaybeObject* KeyedIC::ComputeMonomorphicStub(JSObject* receiver,
 }
 
 
-MaybeObject* KeyedStoreIC::GetFastElementStubWithoutMapCheck(
-    bool is_js_array) {
-  return KeyedStoreFastElementStub(is_js_array).TryGetCode();
-}
-
-
-MaybeObject* KeyedStoreIC::GetExternalArrayStubWithoutMapCheck(
+MaybeObject* KeyedStoreIC::GetElementStubWithoutMapCheck(
+    bool is_js_array,
     JSObject::ElementsKind elements_kind) {
-  return KeyedStoreExternalArrayStub(elements_kind).TryGetCode();
+  return KeyedStoreElementStub(is_js_array, elements_kind).TryGetCode();
 }
 
 
diff --git a/deps/v8/src/ic.h b/deps/v8/src/ic.h
index 9a663ba6aa..11c2e3af45 100644
--- a/deps/v8/src/ic.h
+++ b/deps/v8/src/ic.h
@@ -345,10 +345,8 @@ class KeyedIC: public IC {
   explicit KeyedIC(Isolate* isolate) : IC(NO_EXTRA_FRAME, isolate) {}
   virtual ~KeyedIC() {}
 
-  virtual MaybeObject* GetFastElementStubWithoutMapCheck(
-      bool is_js_array) = 0;
-
-  virtual MaybeObject* GetExternalArrayStubWithoutMapCheck(
+  virtual MaybeObject* GetElementStubWithoutMapCheck(
+      bool is_js_array,
       JSObject::ElementsKind elements_kind) = 0;
 
  protected:
@@ -373,8 +371,7 @@ class KeyedIC: public IC {
 
   MaybeObject* ComputeMonomorphicStubWithoutMapCheck(
       Map* receiver_map,
-      StrictModeFlag strict_mode,
-      Code* generic_stub);
+      StrictModeFlag strict_mode);
 
   MaybeObject* ComputeMonomorphicStub(JSObject* receiver,
                                       bool is_store,
@@ -415,10 +412,8 @@ class KeyedLoadIC: public KeyedIC {
   static const int kSlowCaseBitFieldMask =
       (1 << Map::kIsAccessCheckNeeded) | (1 << Map::kHasIndexedInterceptor);
 
-  virtual MaybeObject* GetFastElementStubWithoutMapCheck(
-      bool is_js_array);
-
-  virtual MaybeObject* GetExternalArrayStubWithoutMapCheck(
+  virtual MaybeObject* GetElementStubWithoutMapCheck(
+      bool is_js_array,
       JSObject::ElementsKind elements_kind);
 
  protected:
@@ -568,10 +563,8 @@ class KeyedStoreIC: public KeyedIC {
   static void GenerateGeneric(MacroAssembler* masm, StrictModeFlag strict_mode);
   static void GenerateNonStrictArguments(MacroAssembler* masm);
 
-  virtual MaybeObject* GetFastElementStubWithoutMapCheck(
-      bool is_js_array);
-
-  virtual MaybeObject* GetExternalArrayStubWithoutMapCheck(
+  virtual MaybeObject* GetElementStubWithoutMapCheck(
+      bool is_js_array,
       JSObject::ElementsKind elements_kind);
 
  protected:
diff --git a/deps/v8/src/isolate.cc b/deps/v8/src/isolate.cc
index 7423274a1e..8a30e7924f 100644
--- a/deps/v8/src/isolate.cc
+++ b/deps/v8/src/isolate.cc
@@ -85,13 +85,9 @@ void ThreadLocalTop::InitializeInternal() {
 #ifdef USE_SIMULATOR
   simulator_ = NULL;
 #endif
-#ifdef ENABLE_LOGGING_AND_PROFILING
   js_entry_sp_ = NULL;
   external_callback_ = NULL;
-#endif
-#ifdef ENABLE_VMSTATE_TRACKING
   current_vm_state_ = EXTERNAL;
-#endif
   try_catch_handler_address_ = NULL;
   context_ = NULL;
   thread_id_ = ThreadId::Invalid();
@@ -1279,11 +1275,9 @@ Handle<Context> Isolate::GetCallingGlobalContext() {
 
 
 char* Isolate::ArchiveThread(char* to) {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   if (RuntimeProfiler::IsEnabled() && current_vm_state() == JS) {
     RuntimeProfiler::IsolateExitedJS(this);
   }
-#endif
   memcpy(to, reinterpret_cast<char*>(thread_local_top()),
          sizeof(ThreadLocalTop));
   InitializeThreadLocal();
@@ -1303,12 +1297,10 @@ char* Isolate::RestoreThread(char* from) {
   thread_local_top()->simulator_ = Simulator::current(this);
 #endif
 #endif
-#ifdef ENABLE_LOGGING_AND_PROFILING
   if (RuntimeProfiler::IsEnabled() && current_vm_state() == JS) {
     RuntimeProfiler::IsolateEnteredJS(this);
   }
   ASSERT(context() == NULL || context()->IsContext());
-#endif
   return from + sizeof(ThreadLocalTop);
 }
 
@@ -1627,7 +1619,6 @@ bool Isolate::PreInit() {
 #define C(name) isolate_addresses_[Isolate::k_##name] =                        \
     reinterpret_cast<Address>(name());
   ISOLATE_ADDRESS_LIST(C)
-  ISOLATE_ADDRESS_LIST_PROF(C)
 #undef C
 
   string_tracker_ = new StringTracker();
diff --git a/deps/v8/src/isolate.h b/deps/v8/src/isolate.h
index a4af1362a3..f2281aa418 100644
--- a/deps/v8/src/isolate.h
+++ b/deps/v8/src/isolate.h
@@ -125,14 +125,8 @@ typedef ZoneList<Handle<Object> > ZoneObjectList;
   C(c_entry_fp_address)                    \
   C(context_address)                       \
   C(pending_exception_address)             \
-  C(external_caught_exception_address)
-
-#ifdef ENABLE_LOGGING_AND_PROFILING
-#define ISOLATE_ADDRESS_LIST_PROF(C)       \
+  C(external_caught_exception_address)     \
   C(js_entry_sp_address)
-#else
-#define ISOLATE_ADDRESS_LIST_PROF(C)
-#endif
 
 
 // Platform-independent, reliable thread identifier.
@@ -252,14 +246,9 @@ class ThreadLocalTop BASE_EMBEDDED {
 #endif
 #endif  // USE_SIMULATOR
 
-#ifdef ENABLE_LOGGING_AND_PROFILING
   Address js_entry_sp_;  // the stack pointer of the bottom js entry frame
   Address external_callback_;  // the external callback we're currently in
-#endif
-
-#ifdef ENABLE_VMSTATE_TRACKING
   StateTag current_vm_state_;
-#endif
 
   // Generated code scratch locations.
   int32_t formal_count_;
@@ -313,18 +302,6 @@ class HashMap;
 
 #endif
 
-#ifdef ENABLE_LOGGING_AND_PROFILING
-
-#define ISOLATE_LOGGING_INIT_LIST(V)                                           \
-  V(CpuProfiler*, cpu_profiler, NULL)                                          \
-  V(HeapProfiler*, heap_profiler, NULL)
-
-#else
-
-#define ISOLATE_LOGGING_INIT_LIST(V)
-
-#endif
-
 #define ISOLATE_INIT_ARRAY_LIST(V)                                             \
   /* SerializerDeserializer state. */                                          \
   V(Object*, serialize_partial_snapshot_cache, kPartialSnapshotCacheCapacity)  \
@@ -373,8 +350,9 @@ typedef List<HeapObject*, PreallocatedStorage> DebugObjectCache;
   /* SafeStackFrameIterator activations count. */                              \
   V(int, safe_stack_iterator_counter, 0)                                       \
   V(uint64_t, enabled_cpu_features, 0)                                         \
+  V(CpuProfiler*, cpu_profiler, NULL)                                          \
+  V(HeapProfiler*, heap_profiler, NULL)                                        \
   ISOLATE_PLATFORM_INIT_LIST(V)                                                \
-  ISOLATE_LOGGING_INIT_LIST(V)                                                 \
   ISOLATE_DEBUGGER_INIT_LIST(V)
 
 class Isolate {
@@ -445,7 +423,6 @@ class Isolate {
   enum AddressId {
 #define C(name) k_##name,
     ISOLATE_ADDRESS_LIST(C)
-    ISOLATE_ADDRESS_LIST_PROF(C)
 #undef C
     k_isolate_address_count
   };
@@ -620,7 +597,6 @@ class Isolate {
   }
   inline Address* handler_address() { return &thread_local_top_.handler_; }
 
-#ifdef ENABLE_LOGGING_AND_PROFILING
   // Bottom JS entry (see StackTracer::Trace in log.cc).
   static Address js_entry_sp(ThreadLocalTop* thread) {
     return thread->js_entry_sp_;
@@ -628,7 +604,6 @@ class Isolate {
   inline Address* js_entry_sp_address() {
     return &thread_local_top_.js_entry_sp_;
   }
-#endif
 
   // Generated code scratch locations.
   void* formal_count_address() { return &thread_local_top_.formal_count_; }
@@ -945,16 +920,13 @@ class Isolate {
 
   static const int kJSRegexpStaticOffsetsVectorSize = 50;
 
-#ifdef ENABLE_LOGGING_AND_PROFILING
   Address external_callback() {
     return thread_local_top_.external_callback_;
   }
   void set_external_callback(Address callback) {
     thread_local_top_.external_callback_ = callback;
   }
-#endif
 
-#ifdef ENABLE_VMSTATE_TRACKING
   StateTag current_vm_state() {
     return thread_local_top_.current_vm_state_;
   }
@@ -980,7 +952,6 @@ class Isolate {
     }
     thread_local_top_.current_vm_state_ = state;
   }
-#endif
 
   void SetData(void* data) { embedder_data_ = data; }
   void* GetData() { return embedder_data_; }
@@ -1356,10 +1327,4 @@ inline void Context::mark_out_of_memory() {
 
 } }  // namespace v8::internal
 
-// TODO(isolates): Get rid of these -inl.h includes and place them only where
-//                 they're needed.
-#include "allocation-inl.h"
-#include "zone-inl.h"
-#include "frames-inl.h"
-
 #endif  // V8_ISOLATE_H_
diff --git a/deps/v8/src/jsregexp.cc b/deps/v8/src/jsregexp.cc
index 3b521f648f..45a39ffbc2 100644
--- a/deps/v8/src/jsregexp.cc
+++ b/deps/v8/src/jsregexp.cc
@@ -491,6 +491,7 @@ RegExpImpl::IrregexpResult RegExpImpl::IrregexpExecOnce(
   ASSERT(output.length() >= (IrregexpNumberOfCaptures(*irregexp) + 1) * 2);
   do {
     bool is_ascii = subject->IsAsciiRepresentation();
+    EnsureCompiledIrregexp(regexp, is_ascii);
     Handle<Code> code(IrregexpNativeCode(*irregexp, is_ascii), isolate);
     NativeRegExpMacroAssembler::Result res =
         NativeRegExpMacroAssembler::Match(code,
diff --git a/deps/v8/src/jsregexp.h b/deps/v8/src/jsregexp.h
index 58958d8513..13f9e2ea06 100644
--- a/deps/v8/src/jsregexp.h
+++ b/deps/v8/src/jsregexp.h
@@ -29,7 +29,6 @@
 #define V8_JSREGEXP_H_
 
 #include "allocation.h"
-#include "macro-assembler.h"
 #include "zone-inl.h"
 
 namespace v8 {
diff --git a/deps/v8/src/lithium-allocator.cc b/deps/v8/src/lithium-allocator.cc
index dcdc5d9b7d..466110678a 100644
--- a/deps/v8/src/lithium-allocator.cc
+++ b/deps/v8/src/lithium-allocator.cc
@@ -1024,7 +1024,7 @@ void LAllocator::ResolvePhis(HBasicBlock* block) {
         operand = chunk_->DefineConstantOperand(constant);
       } else {
         ASSERT(!op->EmitAtUses());
-        LUnallocated* unalloc = new LUnallocated(LUnallocated::NONE);
+        LUnallocated* unalloc = new LUnallocated(LUnallocated::ANY);
         unalloc->set_virtual_register(op->id());
         operand = unalloc;
       }
diff --git a/deps/v8/src/log-inl.h b/deps/v8/src/log-inl.h
index 02238fe921..8aebbc7dde 100644
--- a/deps/v8/src/log-inl.h
+++ b/deps/v8/src/log-inl.h
@@ -34,8 +34,6 @@
 namespace v8 {
 namespace internal {
 
-#ifdef ENABLE_LOGGING_AND_PROFILING
-
 Logger::LogEventsAndTags Logger::ToNativeByScript(Logger::LogEventsAndTags tag,
                                                   Script* script) {
   if ((tag == FUNCTION_TAG || tag == LAZY_COMPILE_TAG || tag == SCRIPT_TAG)
@@ -51,8 +49,6 @@ Logger::LogEventsAndTags Logger::ToNativeByScript(Logger::LogEventsAndTags tag,
   }
 }
 
-#endif  // ENABLE_LOGGING_AND_PROFILING
-
 
 } }  // namespace v8::internal
 
diff --git a/deps/v8/src/log-utils.cc b/deps/v8/src/log-utils.cc
index 1bba7cd54e..2d1ce23dc0 100644
--- a/deps/v8/src/log-utils.cc
+++ b/deps/v8/src/log-utils.cc
@@ -33,101 +33,14 @@
 namespace v8 {
 namespace internal {
 
-#ifdef ENABLE_LOGGING_AND_PROFILING
-
-LogDynamicBuffer::LogDynamicBuffer(
-    int block_size, int max_size, const char* seal, int seal_size)
-    : block_size_(block_size),
-      max_size_(max_size - (max_size % block_size_)),
-      seal_(seal),
-      seal_size_(seal_size),
-      blocks_(max_size_ / block_size_ + 1),
-      write_pos_(0), block_index_(0), block_write_pos_(0), is_sealed_(false) {
-  ASSERT(BlocksCount() > 0);
-  AllocateBlock(0);
-  for (int i = 1; i < BlocksCount(); ++i) {
-    blocks_[i] = NULL;
-  }
-}
-
 
-LogDynamicBuffer::~LogDynamicBuffer() {
-  for (int i = 0; i < BlocksCount(); ++i) {
-    DeleteArray(blocks_[i]);
-  }
-}
+const char* Log::kLogToTemporaryFile = "&";
 
 
-int LogDynamicBuffer::Read(int from_pos, char* dest_buf, int buf_size) {
-  if (buf_size == 0) return 0;
-  int read_pos = from_pos;
-  int block_read_index = BlockIndex(from_pos);
-  int block_read_pos = PosInBlock(from_pos);
-  int dest_buf_pos = 0;
-  // Read until dest_buf is filled, or write_pos_ encountered.
-  while (read_pos < write_pos_ && dest_buf_pos < buf_size) {
-    const int read_size = Min(write_pos_ - read_pos,
-        Min(buf_size - dest_buf_pos, block_size_ - block_read_pos));
-    memcpy(dest_buf + dest_buf_pos,
-           blocks_[block_read_index] + block_read_pos, read_size);
-    block_read_pos += read_size;
-    dest_buf_pos += read_size;
-    read_pos += read_size;
-    if (block_read_pos == block_size_) {
-      block_read_pos = 0;
-      ++block_read_index;
-    }
-  }
-  return dest_buf_pos;
-}
-
-
-int LogDynamicBuffer::Seal() {
-  WriteInternal(seal_, seal_size_);
-  is_sealed_ = true;
-  return 0;
-}
-
-
-int LogDynamicBuffer::Write(const char* data, int data_size) {
-  if (is_sealed_) {
-    return 0;
-  }
-  if ((write_pos_ + data_size) <= (max_size_ - seal_size_)) {
-    return WriteInternal(data, data_size);
-  } else {
-    return Seal();
-  }
-}
-
-
-int LogDynamicBuffer::WriteInternal(const char* data, int data_size) {
-  int data_pos = 0;
-  while (data_pos < data_size) {
-    const int write_size =
-        Min(data_size - data_pos, block_size_ - block_write_pos_);
-    memcpy(blocks_[block_index_] + block_write_pos_, data + data_pos,
-           write_size);
-    block_write_pos_ += write_size;
-    data_pos += write_size;
-    if (block_write_pos_ == block_size_) {
-      block_write_pos_ = 0;
-      AllocateBlock(++block_index_);
-    }
-  }
-  write_pos_ += data_size;
-  return data_size;
-}
-
-// Must be the same message as in Logger::PauseProfiler.
-const char* const Log::kDynamicBufferSeal = "profiler,\"pause\"\n";
-
 Log::Log(Logger* logger)
-  : write_to_file_(false),
-    is_stopped_(false),
+  : is_stopped_(false),
     output_handle_(NULL),
     ll_output_handle_(NULL),
-    output_buffer_(NULL),
     mutex_(NULL),
     message_buffer_(NULL),
     logger_(logger) {
@@ -142,7 +55,6 @@ static void AddIsolateIdIfNeeded(StringStream* stream) {
 
 
 void Log::Initialize() {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   mutex_ = OS::CreateMutex();
   message_buffer_ = NewArray<char>(kMessageBufferSize);
 
@@ -166,19 +78,19 @@ void Log::Initialize() {
     FLAG_prof_auto = false;
   }
 
-  bool start_logging = FLAG_log || FLAG_log_runtime || FLAG_log_api
+  bool open_log_file = FLAG_log || FLAG_log_runtime || FLAG_log_api
       || FLAG_log_code || FLAG_log_gc || FLAG_log_handles || FLAG_log_suspect
       || FLAG_log_regexp || FLAG_log_state_changes || FLAG_ll_prof;
 
-  bool open_log_file = start_logging || FLAG_prof_lazy;
-
   // If we're logging anything, we need to open the log file.
   if (open_log_file) {
     if (strcmp(FLAG_logfile, "-") == 0) {
       OpenStdout();
     } else if (strcmp(FLAG_logfile, "*") == 0) {
-      OpenMemoryBuffer();
-    } else  {
+      // Does nothing for now. Will be removed.
+    } else if (strcmp(FLAG_logfile, kLogToTemporaryFile) == 0) {
+      OpenTemporaryFile();
+    } else {
       if (strchr(FLAG_logfile, '%') != NULL ||
           !Isolate::Current()->IsDefaultIsolate()) {
         // If there's a '%' in the log file name we have to expand
@@ -222,14 +134,18 @@ void Log::Initialize() {
       }
     }
   }
-#endif
 }
 
 
 void Log::OpenStdout() {
   ASSERT(!IsEnabled());
   output_handle_ = stdout;
-  write_to_file_ = true;
+}
+
+
+void Log::OpenTemporaryFile() {
+  ASSERT(!IsEnabled());
+  output_handle_ = i::OS::OpenTemporaryFile();
 }
 
 
@@ -244,7 +160,6 @@ static const int kLowLevelLogBufferSize = 2 * MB;
 void Log::OpenFile(const char* name) {
   ASSERT(!IsEnabled());
   output_handle_ = OS::FOpen(name, OS::LogFileOpenMode);
-  write_to_file_ = true;
   if (FLAG_ll_prof) {
     // Open the low-level log file.
     size_t len = strlen(name);
@@ -257,25 +172,18 @@ void Log::OpenFile(const char* name) {
 }
 
 
-void Log::OpenMemoryBuffer() {
-  ASSERT(!IsEnabled());
-  output_buffer_ = new LogDynamicBuffer(
-      kDynamicBufferBlockSize, kMaxDynamicBufferSize,
-      kDynamicBufferSeal, StrLength(kDynamicBufferSeal));
-  write_to_file_ = false;
-}
-
-
-void Log::Close() {
-  if (write_to_file_) {
-    if (output_handle_ != NULL) fclose(output_handle_);
-    output_handle_ = NULL;
-    if (ll_output_handle_ != NULL) fclose(ll_output_handle_);
-    ll_output_handle_ = NULL;
-  } else {
-    delete output_buffer_;
-    output_buffer_ = NULL;
+FILE* Log::Close() {
+  FILE* result = NULL;
+  if (output_handle_ != NULL) {
+    if (strcmp(FLAG_logfile, kLogToTemporaryFile) != 0) {
+      fclose(output_handle_);
+    } else {
+      result = output_handle_;
+    }
   }
+  output_handle_ = NULL;
+  if (ll_output_handle_ != NULL) fclose(ll_output_handle_);
+  ll_output_handle_ = NULL;
 
   DeleteArray(message_buffer_);
   message_buffer_ = NULL;
@@ -284,27 +192,7 @@ void Log::Close() {
   mutex_ = NULL;
 
   is_stopped_ = false;
-}
-
-
-int Log::GetLogLines(int from_pos, char* dest_buf, int max_size) {
-  if (write_to_file_) return 0;
-  ASSERT(output_buffer_ != NULL);
-  ASSERT(from_pos >= 0);
-  ASSERT(max_size >= 0);
-  int actual_size = output_buffer_->Read(from_pos, dest_buf, max_size);
-  ASSERT(actual_size <= max_size);
-  if (actual_size == 0) return 0;
-
-  // Find previous log line boundary.
-  char* end_pos = dest_buf + actual_size - 1;
-  while (end_pos >= dest_buf && *end_pos != '\n') --end_pos;
-  actual_size = static_cast<int>(end_pos - dest_buf + 1);
-  // If the assertion below is hit, it means that there was no line end
-  // found --- something wrong has happened.
-  ASSERT(actual_size > 0);
-  ASSERT(actual_size <= max_size);
-  return actual_size;
+  return result;
 }
 
 
@@ -413,9 +301,7 @@ void LogMessageBuilder::AppendStringPart(const char* str, int len) {
 
 void LogMessageBuilder::WriteToLogFile() {
   ASSERT(pos_ <= Log::kMessageBufferSize);
-  const int written = log_->write_to_file_ ?
-      log_->WriteToFile(log_->message_buffer_, pos_) :
-      log_->WriteToMemory(log_->message_buffer_, pos_);
+  const int written = log_->WriteToFile(log_->message_buffer_, pos_);
   if (written != pos_) {
     log_->stop();
     log_->logger_->LogFailure();
@@ -423,6 +309,4 @@ void LogMessageBuilder::WriteToLogFile() {
 }
 
 
-#endif  // ENABLE_LOGGING_AND_PROFILING
-
 } }  // namespace v8::internal
diff --git a/deps/v8/src/log-utils.h b/deps/v8/src/log-utils.h
index 81bbf779f3..d336d714b9 100644
--- a/deps/v8/src/log-utils.h
+++ b/deps/v8/src/log-utils.h
@@ -33,69 +33,11 @@
 namespace v8 {
 namespace internal {
 
-#ifdef ENABLE_LOGGING_AND_PROFILING
-
 class Logger;
 
-// A memory buffer that increments its size as you write in it.  Size
-// is incremented with 'block_size' steps, never exceeding 'max_size'.
-// During growth, memory contents are never copied.  At the end of the
-// buffer an amount of memory specified in 'seal_size' is reserved.
-// When writing position reaches max_size - seal_size, buffer auto-seals
-// itself with 'seal' and allows no further writes. Data pointed by
-// 'seal' must be available during entire LogDynamicBuffer lifetime.
-//
-// An instance of this class is created dynamically by Log.
-class LogDynamicBuffer {
- public:
-  LogDynamicBuffer(
-      int block_size, int max_size, const char* seal, int seal_size);
-
-  ~LogDynamicBuffer();
-
-  // Reads contents of the buffer starting from 'from_pos'.  Upon
-  // return, 'dest_buf' is filled with the data. Actual amount of data
-  // filled is returned, it is <= 'buf_size'.
-  int Read(int from_pos, char* dest_buf, int buf_size);
-
-  // Writes 'data' to the buffer, making it larger if necessary.  If
-  // data is too big to fit in the buffer, it doesn't get written at
-  // all. In that case, buffer auto-seals itself and stops to accept
-  // any incoming writes. Returns amount of data written (it is either
-  // 'data_size', or 0, if 'data' is too big).
-  int Write(const char* data, int data_size);
-
- private:
-  void AllocateBlock(int index) {
-    blocks_[index] = NewArray<char>(block_size_);
-  }
-
-  int BlockIndex(int pos) const { return pos / block_size_; }
-
-  int BlocksCount() const { return BlockIndex(max_size_) + 1; }
-
-  int PosInBlock(int pos) const { return pos % block_size_; }
-
-  int Seal();
-
-  int WriteInternal(const char* data, int data_size);
-
-  const int block_size_;
-  const int max_size_;
-  const char* seal_;
-  const int seal_size_;
-  ScopedVector<char*> blocks_;
-  int write_pos_;
-  int block_index_;
-  int block_write_pos_;
-  bool is_sealed_;
-};
-
-
 // Functions and data for performing output of log messages.
 class Log {
  public:
-
   // Performs process-wide initialization.
   void Initialize();
 
@@ -103,18 +45,21 @@ class Log {
   void stop() { is_stopped_ = true; }
 
   // Frees all resources acquired in Initialize and Open... functions.
-  void Close();
-
-  // See description in include/v8.h.
-  int GetLogLines(int from_pos, char* dest_buf, int max_size);
+  // When a temporary file is used for the log, returns its stream descriptor,
+  // leaving the file open.
+  FILE* Close();
 
   // Returns whether logging is enabled.
   bool IsEnabled() {
-    return !is_stopped_ && (output_handle_ != NULL || output_buffer_ != NULL);
+    return !is_stopped_ && output_handle_ != NULL;
   }
 
   // Size of buffer used for formatting log messages.
-  static const int kMessageBufferSize = v8::V8::kMinimumSizeForLogLinesBuffer;
+  static const int kMessageBufferSize = 2048;
+
+  // This mode is only used in tests, as temporary files are automatically
+  // deleted on close and thus can't be accessed afterwards.
+  static const char* kLogToTemporaryFile;
 
  private:
   explicit Log(Logger* logger);
@@ -125,8 +70,8 @@ class Log {
   // Opens file for logging.
   void OpenFile(const char* name);
 
-  // Opens memory buffer for logging.
-  void OpenMemoryBuffer();
+  // Opens a temporary file for logging.
+  void OpenTemporaryFile();
 
   // Implementation of writing to a log file.
   int WriteToFile(const char* msg, int length) {
@@ -138,38 +83,16 @@ class Log {
     return length;
   }
 
-  // Implementation of writing to a memory buffer.
-  int WriteToMemory(const char* msg, int length) {
-    ASSERT(output_buffer_ != NULL);
-    return output_buffer_->Write(msg, length);
-  }
-
-  bool write_to_file_;
-
   // Whether logging is stopped (e.g. due to insufficient resources).
   bool is_stopped_;
 
-  // When logging is active, either output_handle_ or output_buffer_ is used
-  // to store a pointer to log destination. If logging was opened via OpenStdout
-  // or OpenFile, then output_handle_ is used. If logging was opened
-  // via OpenMemoryBuffer, then output_buffer_ is used.
-  // mutex_ should be acquired before using output_handle_ or output_buffer_.
+  // When logging is active output_handle_ is used to store a pointer to log
+  // destination.  mutex_ should be acquired before using output_handle_.
   FILE* output_handle_;
 
   // Used when low-level profiling is active.
   FILE* ll_output_handle_;
 
-  LogDynamicBuffer* output_buffer_;
-
-  // Size of dynamic buffer block (and dynamic buffer initial size).
-  static const int kDynamicBufferBlockSize = 65536;
-
-  // Maximum size of dynamic buffer.
-  static const int kMaxDynamicBufferSize = 50 * 1024 * 1024;
-
-  // Message to "seal" dynamic buffer with.
-  static const char* const kDynamicBufferSeal;
-
   // mutex_ is a Mutex used for enforcing exclusive
   // access to the formatting buffer and the log file or log memory buffer.
   Mutex* mutex_;
@@ -224,8 +147,6 @@ class LogMessageBuilder BASE_EMBEDDED {
   int pos_;
 };
 
-#endif  // ENABLE_LOGGING_AND_PROFILING
-
 } }  // namespace v8::internal
 
 #endif  // V8_LOG_UTILS_H_
diff --git a/deps/v8/src/log.cc b/deps/v8/src/log.cc
index 004e21a650..04fd22ef5c 100644
--- a/deps/v8/src/log.cc
+++ b/deps/v8/src/log.cc
@@ -43,8 +43,6 @@
 namespace v8 {
 namespace internal {
 
-#ifdef ENABLE_LOGGING_AND_PROFILING
-
 //
 // Sliding state window.  Updates counters to keep track of the last
 // window of kBufferSize states.  This is useful to track where we
@@ -554,71 +552,54 @@ void Logger::ProfilerBeginEvent() {
   msg.WriteToLogFile();
 }
 
-#endif  // ENABLE_LOGGING_AND_PROFILING
-
 
 void Logger::StringEvent(const char* name, const char* value) {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   if (FLAG_log) UncheckedStringEvent(name, value);
-#endif
 }
 
 
-#ifdef ENABLE_LOGGING_AND_PROFILING
 void Logger::UncheckedStringEvent(const char* name, const char* value) {
   if (!log_->IsEnabled()) return;
   LogMessageBuilder msg(this);
   msg.Append("%s,\"%s\"\n", name, value);
   msg.WriteToLogFile();
 }
-#endif
 
 
 void Logger::IntEvent(const char* name, int value) {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   if (FLAG_log) UncheckedIntEvent(name, value);
-#endif
 }
 
 
 void Logger::IntPtrTEvent(const char* name, intptr_t value) {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   if (FLAG_log) UncheckedIntPtrTEvent(name, value);
-#endif
 }
 
 
-#ifdef ENABLE_LOGGING_AND_PROFILING
 void Logger::UncheckedIntEvent(const char* name, int value) {
   if (!log_->IsEnabled()) return;
   LogMessageBuilder msg(this);
   msg.Append("%s,%d\n", name, value);
   msg.WriteToLogFile();
 }
-#endif
 
 
-#ifdef ENABLE_LOGGING_AND_PROFILING
 void Logger::UncheckedIntPtrTEvent(const char* name, intptr_t value) {
   if (!log_->IsEnabled()) return;
   LogMessageBuilder msg(this);
   msg.Append("%s,%" V8_PTR_PREFIX "d\n", name, value);
   msg.WriteToLogFile();
 }
-#endif
 
 
 void Logger::HandleEvent(const char* name, Object** location) {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   if (!log_->IsEnabled() || !FLAG_log_handles) return;
   LogMessageBuilder msg(this);
   msg.Append("%s,0x%" V8PRIxPTR "\n", name, location);
   msg.WriteToLogFile();
-#endif
 }
 
 
-#ifdef ENABLE_LOGGING_AND_PROFILING
 // ApiEvent is private so all the calls come from the Logger class.  It is the
 // caller's responsibility to ensure that log is enabled and that
 // FLAG_log_api is true.
@@ -631,11 +612,9 @@ void Logger::ApiEvent(const char* format, ...) {
   va_end(ap);
   msg.WriteToLogFile();
 }
-#endif
 
 
 void Logger::ApiNamedSecurityCheck(Object* key) {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   if (!log_->IsEnabled() || !FLAG_log_api) return;
   if (key->IsString()) {
     SmartPointer<char> str =
@@ -646,14 +625,12 @@ void Logger::ApiNamedSecurityCheck(Object* key) {
   } else {
     ApiEvent("api,check-security,['no-name']\n");
   }
-#endif
 }
 
 
 void Logger::SharedLibraryEvent(const char* library_path,
                                 uintptr_t start,
                                 uintptr_t end) {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   if (!log_->IsEnabled() || !FLAG_prof) return;
   LogMessageBuilder msg(this);
   msg.Append("shared-library,\"%s\",0x%08" V8PRIxPTR ",0x%08" V8PRIxPTR "\n",
@@ -661,14 +638,12 @@ void Logger::SharedLibraryEvent(const char* library_path,
              start,
              end);
   msg.WriteToLogFile();
-#endif
 }
 
 
 void Logger::SharedLibraryEvent(const wchar_t* library_path,
                                 uintptr_t start,
                                 uintptr_t end) {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   if (!log_->IsEnabled() || !FLAG_prof) return;
   LogMessageBuilder msg(this);
   msg.Append("shared-library,\"%ls\",0x%08" V8PRIxPTR ",0x%08" V8PRIxPTR "\n",
@@ -676,11 +651,9 @@ void Logger::SharedLibraryEvent(const wchar_t* library_path,
              start,
              end);
   msg.WriteToLogFile();
-#endif
 }
 
 
-#ifdef ENABLE_LOGGING_AND_PROFILING
 void Logger::LogRegExpSource(Handle<JSRegExp> regexp) {
   // Prints "/" + re.source + "/" +
   //      (re.global?"g":"") + (re.ignorecase?"i":"") + (re.multiline?"m":"")
@@ -721,23 +694,19 @@ void Logger::LogRegExpSource(Handle<JSRegExp> regexp) {
 
   msg.WriteToLogFile();
 }
-#endif  // ENABLE_LOGGING_AND_PROFILING
 
 
 void Logger::RegExpCompileEvent(Handle<JSRegExp> regexp, bool in_cache) {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   if (!log_->IsEnabled() || !FLAG_log_regexp) return;
   LogMessageBuilder msg(this);
   msg.Append("regexp-compile,");
   LogRegExpSource(regexp);
   msg.Append(in_cache ? ",hit\n" : ",miss\n");
   msg.WriteToLogFile();
-#endif
 }
 
 
 void Logger::LogRuntime(Vector<const char> format, JSArray* args) {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   if (!log_->IsEnabled() || !FLAG_log_runtime) return;
   HandleScope scope;
   LogMessageBuilder msg(this);
@@ -778,22 +747,18 @@ void Logger::LogRuntime(Vector<const char> format, JSArray* args) {
   }
   msg.Append('\n');
   msg.WriteToLogFile();
-#endif
 }
 
 
 void Logger::ApiIndexedSecurityCheck(uint32_t index) {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   if (!log_->IsEnabled() || !FLAG_log_api) return;
   ApiEvent("api,check-security,%u\n", index);
-#endif
 }
 
 
 void Logger::ApiNamedPropertyAccess(const char* tag,
                                     JSObject* holder,
                                     Object* name) {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   ASSERT(name->IsString());
   if (!log_->IsEnabled() || !FLAG_log_api) return;
   String* class_name_obj = holder->class_name();
@@ -802,58 +767,47 @@ void Logger::ApiNamedPropertyAccess(const char* tag,
   SmartPointer<char> property_name =
       String::cast(name)->ToCString(DISALLOW_NULLS, ROBUST_STRING_TRAVERSAL);
   ApiEvent("api,%s,\"%s\",\"%s\"\n", tag, *class_name, *property_name);
-#endif
 }
 
 void Logger::ApiIndexedPropertyAccess(const char* tag,
                                       JSObject* holder,
                                       uint32_t index) {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   if (!log_->IsEnabled() || !FLAG_log_api) return;
   String* class_name_obj = holder->class_name();
   SmartPointer<char> class_name =
       class_name_obj->ToCString(DISALLOW_NULLS, ROBUST_STRING_TRAVERSAL);
   ApiEvent("api,%s,\"%s\",%u\n", tag, *class_name, index);
-#endif
 }
 
 void Logger::ApiObjectAccess(const char* tag, JSObject* object) {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   if (!log_->IsEnabled() || !FLAG_log_api) return;
   String* class_name_obj = object->class_name();
   SmartPointer<char> class_name =
       class_name_obj->ToCString(DISALLOW_NULLS, ROBUST_STRING_TRAVERSAL);
   ApiEvent("api,%s,\"%s\"\n", tag, *class_name);
-#endif
 }
 
 
 void Logger::ApiEntryCall(const char* name) {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   if (!log_->IsEnabled() || !FLAG_log_api) return;
   ApiEvent("api,%s\n", name);
-#endif
 }
 
 
 void Logger::NewEvent(const char* name, void* object, size_t size) {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   if (!log_->IsEnabled() || !FLAG_log) return;
   LogMessageBuilder msg(this);
   msg.Append("new,%s,0x%" V8PRIxPTR ",%u\n", name, object,
              static_cast<unsigned int>(size));
   msg.WriteToLogFile();
-#endif
 }
 
 
 void Logger::DeleteEvent(const char* name, void* object) {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   if (!log_->IsEnabled() || !FLAG_log) return;
   LogMessageBuilder msg(this);
   msg.Append("delete,%s,0x%" V8PRIxPTR "\n", name, object);
   msg.WriteToLogFile();
-#endif
 }
 
 
@@ -866,7 +820,6 @@ void Logger::DeleteEventStatic(const char* name, void* object) {
   LOGGER->DeleteEvent(name, object);
 }
 
-#ifdef ENABLE_LOGGING_AND_PROFILING
 void Logger::CallbackEventInternal(const char* prefix, const char* name,
                                    Address entry_point) {
   if (!log_->IsEnabled() || !FLAG_log_code) return;
@@ -879,43 +832,35 @@ void Logger::CallbackEventInternal(const char* prefix, const char* name,
   msg.Append('\n');
   msg.WriteToLogFile();
 }
-#endif
 
 
 void Logger::CallbackEvent(String* name, Address entry_point) {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   if (!log_->IsEnabled() || !FLAG_log_code) return;
   SmartPointer<char> str =
       name->ToCString(DISALLOW_NULLS, ROBUST_STRING_TRAVERSAL);
   CallbackEventInternal("", *str, entry_point);
-#endif
 }
 
 
 void Logger::GetterCallbackEvent(String* name, Address entry_point) {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   if (!log_->IsEnabled() || !FLAG_log_code) return;
   SmartPointer<char> str =
       name->ToCString(DISALLOW_NULLS, ROBUST_STRING_TRAVERSAL);
   CallbackEventInternal("get ", *str, entry_point);
-#endif
 }
 
 
 void Logger::SetterCallbackEvent(String* name, Address entry_point) {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   if (!log_->IsEnabled() || !FLAG_log_code) return;
   SmartPointer<char> str =
       name->ToCString(DISALLOW_NULLS, ROBUST_STRING_TRAVERSAL);
   CallbackEventInternal("set ", *str, entry_point);
-#endif
 }
 
 
 void Logger::CodeCreateEvent(LogEventsAndTags tag,
                              Code* code,
                              const char* comment) {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   if (!log_->IsEnabled()) return;
   if (FLAG_ll_prof || Serializer::enabled()) {
     name_buffer_->Reset();
@@ -945,14 +890,12 @@ void Logger::CodeCreateEvent(LogEventsAndTags tag,
   msg.Append('"');
   msg.Append('\n');
   msg.WriteToLogFile();
-#endif
 }
 
 
 void Logger::CodeCreateEvent(LogEventsAndTags tag,
                              Code* code,
                              String* name) {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   if (!log_->IsEnabled()) return;
   if (FLAG_ll_prof || Serializer::enabled()) {
     name_buffer_->Reset();
@@ -977,11 +920,9 @@ void Logger::CodeCreateEvent(LogEventsAndTags tag,
   msg.Append('"');
   msg.Append('\n');
   msg.WriteToLogFile();
-#endif
 }
 
 
-#ifdef ENABLE_LOGGING_AND_PROFILING
 // ComputeMarker must only be used when SharedFunctionInfo is known.
 static const char* ComputeMarker(Code* code) {
   switch (code->kind()) {
@@ -990,14 +931,12 @@ static const char* ComputeMarker(Code* code) {
     default: return "";
   }
 }
-#endif
 
 
 void Logger::CodeCreateEvent(LogEventsAndTags tag,
                              Code* code,
                              SharedFunctionInfo* shared,
                              String* name) {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   if (!log_->IsEnabled()) return;
   if (FLAG_ll_prof || Serializer::enabled()) {
     name_buffer_->Reset();
@@ -1029,7 +968,6 @@ void Logger::CodeCreateEvent(LogEventsAndTags tag,
   msg.Append(",%s", ComputeMarker(code));
   msg.Append('\n');
   msg.WriteToLogFile();
-#endif
 }
 
 
@@ -1040,7 +978,6 @@ void Logger::CodeCreateEvent(LogEventsAndTags tag,
                              Code* code,
                              SharedFunctionInfo* shared,
                              String* source, int line) {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   if (!log_->IsEnabled()) return;
   if (FLAG_ll_prof || Serializer::enabled()) {
     name_buffer_->Reset();
@@ -1078,12 +1015,10 @@ void Logger::CodeCreateEvent(LogEventsAndTags tag,
   msg.Append(",%s", ComputeMarker(code));
   msg.Append('\n');
   msg.WriteToLogFile();
-#endif
 }
 
 
 void Logger::CodeCreateEvent(LogEventsAndTags tag, Code* code, int args_count) {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   if (!log_->IsEnabled()) return;
   if (FLAG_ll_prof || Serializer::enabled()) {
     name_buffer_->Reset();
@@ -1106,21 +1041,17 @@ void Logger::CodeCreateEvent(LogEventsAndTags tag, Code* code, int args_count) {
   msg.Append(",%d,\"args_count: %d\"", code->ExecutableSize(), args_count);
   msg.Append('\n');
   msg.WriteToLogFile();
-#endif
 }
 
 
 void Logger::CodeMovingGCEvent() {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   if (!log_->IsEnabled() || !FLAG_ll_prof) return;
   LowLevelLogWriteBytes(&kCodeMovingGCTag, sizeof(kCodeMovingGCTag));
   OS::SignalCodeMovingGC();
-#endif
 }
 
 
 void Logger::RegExpCodeCreateEvent(Code* code, String* source) {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   if (!log_->IsEnabled()) return;
   if (FLAG_ll_prof || Serializer::enabled()) {
     name_buffer_->Reset();
@@ -1145,36 +1076,30 @@ void Logger::RegExpCodeCreateEvent(Code* code, String* source) {
   msg.Append('\"');
   msg.Append('\n');
   msg.WriteToLogFile();
-#endif
 }
 
 
 void Logger::CodeMoveEvent(Address from, Address to) {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   if (!log_->IsEnabled()) return;
   if (FLAG_ll_prof) LowLevelCodeMoveEvent(from, to);
   if (Serializer::enabled() && address_to_name_map_ != NULL) {
     address_to_name_map_->Move(from, to);
   }
   MoveEventInternal(CODE_MOVE_EVENT, from, to);
-#endif
 }
 
 
 void Logger::CodeDeleteEvent(Address from) {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   if (!log_->IsEnabled()) return;
   if (FLAG_ll_prof) LowLevelCodeDeleteEvent(from);
   if (Serializer::enabled() && address_to_name_map_ != NULL) {
     address_to_name_map_->Remove(from);
   }
   DeleteEventInternal(CODE_DELETE_EVENT, from);
-#endif
 }
 
 
 void Logger::SnapshotPositionEvent(Address addr, int pos) {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   if (!log_->IsEnabled()) return;
   if (FLAG_ll_prof) LowLevelSnapshotPositionEvent(addr, pos);
   if (Serializer::enabled() && address_to_name_map_ != NULL) {
@@ -1196,18 +1121,14 @@ void Logger::SnapshotPositionEvent(Address addr, int pos) {
   msg.Append(",%d", pos);
   msg.Append('\n');
   msg.WriteToLogFile();
-#endif
 }
 
 
 void Logger::SharedFunctionInfoMoveEvent(Address from, Address to) {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   MoveEventInternal(SHARED_FUNC_MOVE_EVENT, from, to);
-#endif
 }
 
 
-#ifdef ENABLE_LOGGING_AND_PROFILING
 void Logger::MoveEventInternal(LogEventsAndTags event,
                                Address from,
                                Address to) {
@@ -1220,10 +1141,8 @@ void Logger::MoveEventInternal(LogEventsAndTags event,
   msg.Append('\n');
   msg.WriteToLogFile();
 }
-#endif
 
 
-#ifdef ENABLE_LOGGING_AND_PROFILING
 void Logger::DeleteEventInternal(LogEventsAndTags event, Address from) {
   if (!log_->IsEnabled() || !FLAG_log_code) return;
   LogMessageBuilder msg(this);
@@ -1232,11 +1151,9 @@ void Logger::DeleteEventInternal(LogEventsAndTags event, Address from) {
   msg.Append('\n');
   msg.WriteToLogFile();
 }
-#endif
 
 
 void Logger::ResourceEvent(const char* name, const char* tag) {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   if (!log_->IsEnabled() || !FLAG_log) return;
   LogMessageBuilder msg(this);
   msg.Append("%s,%s,", name, tag);
@@ -1249,12 +1166,10 @@ void Logger::ResourceEvent(const char* name, const char* tag) {
 
   msg.Append('\n');
   msg.WriteToLogFile();
-#endif
 }
 
 
 void Logger::SuspectReadEvent(String* name, Object* obj) {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   if (!log_->IsEnabled() || !FLAG_log_suspect) return;
   LogMessageBuilder msg(this);
   String* class_name = obj->IsJSObject()
@@ -1268,12 +1183,10 @@ void Logger::SuspectReadEvent(String* name, Object* obj) {
   msg.Append('"');
   msg.Append('\n');
   msg.WriteToLogFile();
-#endif
 }
 
 
 void Logger::HeapSampleBeginEvent(const char* space, const char* kind) {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   if (!log_->IsEnabled() || !FLAG_log_gc) return;
   LogMessageBuilder msg(this);
   // Using non-relative system time in order to be able to synchronize with
@@ -1281,42 +1194,34 @@ void Logger::HeapSampleBeginEvent(const char* space, const char* kind) {
   msg.Append("heap-sample-begin,\"%s\",\"%s\",%.0f\n",
              space, kind, OS::TimeCurrentMillis());
   msg.WriteToLogFile();
-#endif
 }
 
 
 void Logger::HeapSampleEndEvent(const char* space, const char* kind) {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   if (!log_->IsEnabled() || !FLAG_log_gc) return;
   LogMessageBuilder msg(this);
   msg.Append("heap-sample-end,\"%s\",\"%s\"\n", space, kind);
   msg.WriteToLogFile();
-#endif
 }
 
 
 void Logger::HeapSampleItemEvent(const char* type, int number, int bytes) {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   if (!log_->IsEnabled() || !FLAG_log_gc) return;
   LogMessageBuilder msg(this);
   msg.Append("heap-sample-item,%s,%d,%d\n", type, number, bytes);
   msg.WriteToLogFile();
-#endif
 }
 
 
 void Logger::DebugTag(const char* call_site_tag) {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   if (!log_->IsEnabled() || !FLAG_log) return;
   LogMessageBuilder msg(this);
   msg.Append("debug-tag,%s\n", call_site_tag);
   msg.WriteToLogFile();
-#endif
 }
 
 
 void Logger::DebugEvent(const char* event_type, Vector<uint16_t> parameter) {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   if (!log_->IsEnabled() || !FLAG_log) return;
   StringBuilder s(parameter.length() + 1);
   for (int i = 0; i < parameter.length(); ++i) {
@@ -1330,11 +1235,9 @@ void Logger::DebugEvent(const char* event_type, Vector<uint16_t> parameter) {
              parameter_string);
   DeleteArray(parameter_string);
   msg.WriteToLogFile();
-#endif
 }
 
 
-#ifdef ENABLE_LOGGING_AND_PROFILING
 void Logger::TickEvent(TickSample* sample, bool overflow) {
   if (!log_->IsEnabled() || !FLAG_prof) return;
   LogMessageBuilder msg(this);
@@ -1378,7 +1281,6 @@ void Logger::PauseProfiler() {
           ticker_->Stop();
         }
         FLAG_log_code = false;
-        // Must be the same message as Log::kDynamicBufferSeal.
         LOG(ISOLATE, UncheckedStringEvent("profiler", "pause"));
       }
       --logging_nesting_;
@@ -1420,11 +1322,6 @@ bool Logger::IsProfilerSamplerActive() {
 }
 
 
-int Logger::GetLogLines(int from_pos, char* dest_buf, int max_size) {
-  return log_->GetLogLines(from_pos, dest_buf, max_size);
-}
-
-
 class EnumerateOptimizedFunctionsVisitor: public OptimizedFunctionVisitor {
  public:
   EnumerateOptimizedFunctionsVisitor(Handle<SharedFunctionInfo>* sfis,
@@ -1545,7 +1442,6 @@ void Logger::LogCodeObject(Object* object) {
 
 
 void Logger::LogCodeInfo() {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   if (!log_->IsEnabled() || !FLAG_ll_prof) return;
 #if V8_TARGET_ARCH_IA32
   const char arch[] = "ia32";
@@ -1557,7 +1453,6 @@ void Logger::LogCodeInfo() {
   const char arch[] = "unknown";
 #endif
   LowLevelLogWriteBytes(arch, sizeof(arch));
-#endif  // ENABLE_LOGGING_AND_PROFILING
 }
 
 
@@ -1710,11 +1605,8 @@ void Logger::LogAccessorCallbacks() {
   }
 }
 
-#endif
-
 
 bool Logger::Setup() {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   // Tests and EnsureInitialize() can call this twice in a row. It's harmless.
   if (is_initialized_) return true;
   is_initialized_ = true;
@@ -1766,40 +1658,27 @@ bool Logger::Setup() {
   }
 
   return true;
-
-#else
-  return false;
-#endif
 }
 
 
 Sampler* Logger::sampler() {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   return ticker_;
-#else
-  return NULL;
-#endif
 }
 
 
 void Logger::EnsureTickerStarted() {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   ASSERT(ticker_ != NULL);
   if (!ticker_->IsActive()) ticker_->Start();
-#endif
 }
 
 
 void Logger::EnsureTickerStopped() {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   if (ticker_ != NULL && ticker_->IsActive()) ticker_->Stop();
-#endif
 }
 
 
-void Logger::TearDown() {
-#ifdef ENABLE_LOGGING_AND_PROFILING
-  if (!is_initialized_) return;
+FILE* Logger::TearDown() {
+  if (!is_initialized_) return NULL;
   is_initialized_ = false;
 
   // Stop the profiler before closing the file.
@@ -1815,13 +1694,11 @@ void Logger::TearDown() {
   delete ticker_;
   ticker_ = NULL;
 
-  log_->Close();
-#endif
+  return log_->Close();
 }
 
 
 void Logger::EnableSlidingStateWindow() {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   // If the ticker is NULL, Logger::Setup has not been called yet.  In
   // that case, we set the sliding_state_window flag so that the
   // sliding window computation will be started when Logger::Setup is
@@ -1835,7 +1712,6 @@ void Logger::EnableSlidingStateWindow() {
   if (sliding_state_window_ == NULL) {
     sliding_state_window_ = new SlidingStateWindow(Isolate::Current());
   }
-#endif
 }
 
 
@@ -1855,10 +1731,8 @@ bool SamplerRegistry::IterateActiveSamplers(VisitSampler func, void* param) {
 
 
 static void ComputeCpuProfiling(Sampler* sampler, void* flag_ptr) {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   bool* flag = reinterpret_cast<bool*>(flag_ptr);
   *flag |= sampler->IsProfiling();
-#endif
 }
 
 
diff --git a/deps/v8/src/log.h b/deps/v8/src/log.h
index 6ffd18c61b..02250595f8 100644
--- a/deps/v8/src/log.h
+++ b/deps/v8/src/log.h
@@ -78,7 +78,6 @@ class SlidingStateWindow;
 class Ticker;
 
 #undef LOG
-#ifdef ENABLE_LOGGING_AND_PROFILING
 #define LOG(isolate, Call)                          \
   do {                                              \
     v8::internal::Logger* logger =                  \
@@ -86,9 +85,6 @@ class Ticker;
     if (logger->is_logging())                       \
       logger->Call;                                 \
   } while (false)
-#else
-#define LOG(isolate, Call) ((void) 0)
-#endif
 
 #define LOG_EVENTS_AND_TAGS_LIST(V)                                     \
   V(CODE_CREATION_EVENT,            "code-creation")                    \
@@ -161,7 +157,9 @@ class Logger {
   Sampler* sampler();
 
   // Frees resources acquired in Setup.
-  void TearDown();
+  // When a temporary file is used for the log, returns its stream descriptor,
+  // leaving the file open.
+  FILE* TearDown();
 
   // Enable the computation of a sliding window of states.
   void EnableSlidingStateWindow();
@@ -272,7 +270,6 @@ class Logger {
   // Log an event reported from generated code
   void LogRuntime(Vector<const char> format, JSArray* args);
 
-#ifdef ENABLE_LOGGING_AND_PROFILING
   bool is_logging() {
     return logging_nesting_ > 0;
   }
@@ -284,10 +281,6 @@ class Logger {
   void ResumeProfiler();
   bool IsProfilerPaused();
 
-  // If logging is performed into a memory buffer, allows to
-  // retrieve previously written messages. See v8.h.
-  int GetLogLines(int from_pos, char* dest_buf, int max_size);
-
   // Logs all compiled functions found in the heap.
   void LogCompiledFunctions();
   // Logs all accessor callbacks found in the heap.
@@ -424,9 +417,6 @@ class Logger {
   Address prev_code_;
 
   friend class CpuProfiler;
-#else
-  bool is_logging() { return false; }
-#endif
 };
 
 
diff --git a/deps/v8/src/mark-compact.cc b/deps/v8/src/mark-compact.cc
index 5792f6c403..0bf82863d7 100644
--- a/deps/v8/src/mark-compact.cc
+++ b/deps/v8/src/mark-compact.cc
@@ -1661,31 +1661,34 @@ void MarkCompactCollector::ClearNonLiveTransitions() {
 
     // Clear dead prototype transitions.
     int number_of_transitions = map->NumberOfProtoTransitions();
-    FixedArray* prototype_transitions = map->unchecked_prototype_transitions();
-    int new_number_of_transitions = 0;
-    const int header = Map::kProtoTransitionHeaderSize;
-    const int proto_offset =
-        header + Map::kProtoTransitionPrototypeOffset;
-    const int map_offset = header + Map::kProtoTransitionMapOffset;
-    const int step = Map::kProtoTransitionElementsPerEntry;
-    for (int i = 0; i < number_of_transitions; i++) {
-      Object* prototype = prototype_transitions->get(proto_offset + i * step);
-      Object* cached_map = prototype_transitions->get(map_offset + i * step);
-      if (HeapObject::cast(prototype)->IsMarked() &&
-          HeapObject::cast(cached_map)->IsMarked()) {
-        if (new_number_of_transitions != i) {
-          prototype_transitions->set_unchecked(
-              heap_,
-              proto_offset + new_number_of_transitions * step,
-              prototype,
-              UPDATE_WRITE_BARRIER);
-          prototype_transitions->set_unchecked(
-              heap_,
-              map_offset + new_number_of_transitions * step,
-              cached_map,
-              SKIP_WRITE_BARRIER);
+    if (number_of_transitions > 0) {
+      FixedArray* prototype_transitions =
+          map->unchecked_prototype_transitions();
+      int new_number_of_transitions = 0;
+      const int header = Map::kProtoTransitionHeaderSize;
+      const int proto_offset =
+          header + Map::kProtoTransitionPrototypeOffset;
+      const int map_offset = header + Map::kProtoTransitionMapOffset;
+      const int step = Map::kProtoTransitionElementsPerEntry;
+      for (int i = 0; i < number_of_transitions; i++) {
+        Object* prototype = prototype_transitions->get(proto_offset + i * step);
+        Object* cached_map = prototype_transitions->get(map_offset + i * step);
+        if (HeapObject::cast(prototype)->IsMarked() &&
+            HeapObject::cast(cached_map)->IsMarked()) {
+          if (new_number_of_transitions != i) {
+            prototype_transitions->set_unchecked(
+                heap_,
+                proto_offset + new_number_of_transitions * step,
+                prototype,
+                UPDATE_WRITE_BARRIER);
+            prototype_transitions->set_unchecked(
+                heap_,
+                map_offset + new_number_of_transitions * step,
+                cached_map,
+                SKIP_WRITE_BARRIER);
+          }
+          new_number_of_transitions++;
         }
-        new_number_of_transitions++;
       }
 
       // Fill slots that became free with undefined value.
@@ -3255,11 +3258,9 @@ void MarkCompactCollector::ReportDeleteIfNeeded(HeapObject* obj,
     GDBJITInterface::RemoveCode(reinterpret_cast<Code*>(obj));
   }
 #endif
-#ifdef ENABLE_LOGGING_AND_PROFILING
   if (obj->IsCode()) {
     PROFILE(isolate, CodeDeleteEvent(obj->address()));
   }
-#endif
 }
 
 
diff --git a/deps/v8/src/messages.js b/deps/v8/src/messages.js
index 841c5180a3..b9281070a7 100644
--- a/deps/v8/src/messages.js
+++ b/deps/v8/src/messages.js
@@ -195,6 +195,7 @@ function FormatMessage(message) {
       non_extensible_proto:         ["%0", " is not extensible"],
       handler_non_object:           ["Proxy.", "%0", " called with non-object as handler"],
       handler_trap_missing:         ["Proxy handler ", "%0", " has no '", "%1", "' trap"],
+      handler_failed:               ["Proxy handler ", "%0", " returned false for '", "%1", "' trap"],
       proxy_prop_not_configurable:  ["Trap ", "%1", " of proxy handler ", "%0", " returned non-configurable descriptor for property ", "%2"],
       proxy_non_object_prop_names:  ["Trap ", "%1", " returned non-object ", "%0"],
       proxy_repeated_prop_name:     ["Trap ", "%1", " returned repeated property name ", "%2"],
diff --git a/deps/v8/src/mips/assembler-mips.h b/deps/v8/src/mips/assembler-mips.h
index 92c958b962..f3730d6f31 100644
--- a/deps/v8/src/mips/assembler-mips.h
+++ b/deps/v8/src/mips/assembler-mips.h
@@ -779,8 +779,13 @@ class Assembler : public AssemblerBase {
   void fcmp(FPURegister src1, const double src2, FPUCondition cond);
 
   // Check the code size generated from label to here.
-  int InstructionsGeneratedSince(Label* l) {
-    return (pc_offset() - l->pos()) / kInstrSize;
+  int SizeOfCodeGeneratedSince(Label* label) {
+    return pc_offset() - label->pos();
+  }
+
+  // Check the number of instructions generated from label to here.
+  int InstructionsGeneratedSince(Label* label) {
+    return SizeOfCodeGeneratedSince(label) / kInstrSize;
   }
 
   // Class for scoping postponing the trampoline pool generation.
diff --git a/deps/v8/src/mips/builtins-mips.cc b/deps/v8/src/mips/builtins-mips.cc
index 4bb1d8cba7..1555653f0a 100644
--- a/deps/v8/src/mips/builtins-mips.cc
+++ b/deps/v8/src/mips/builtins-mips.cc
@@ -634,7 +634,7 @@ void Builtins::Generate_JSConstructCall(MacroAssembler* masm) {
   __ lw(a2, FieldMemOperand(a1, JSFunction::kSharedFunctionInfoOffset));
   __ lw(a2, FieldMemOperand(a2, SharedFunctionInfo::kConstructStubOffset));
   __ Addu(t9, a2, Operand(Code::kHeaderSize - kHeapObjectTag));
-  __ Jump(Operand(t9));
+  __ Jump(t9);
 
   // a0: number of arguments
   // a1: called object
@@ -1075,8 +1075,7 @@ static void Generate_JSEntryTrampolineHelper(MacroAssembler* masm,
   // Invoke the code and pass argc as a0.
   __ mov(a0, a3);
   if (is_construct) {
-    __ Call(masm->isolate()->builtins()->JSConstructCall(),
-            RelocInfo::CODE_TARGET);
+    __ Call(masm->isolate()->builtins()->JSConstructCall());
   } else {
     ParameterCount actual(a0);
     __ InvokeFunction(a1, actual, CALL_FUNCTION,
diff --git a/deps/v8/src/mips/code-stubs-mips.cc b/deps/v8/src/mips/code-stubs-mips.cc
index d7fac867f3..d03443f272 100644
--- a/deps/v8/src/mips/code-stubs-mips.cc
+++ b/deps/v8/src/mips/code-stubs-mips.cc
@@ -305,12 +305,6 @@ class ConvertToDoubleStub : public CodeStub {
   }
 
   void Generate(MacroAssembler* masm);
-
-  const char* GetName() { return "ConvertToDoubleStub"; }
-
-#ifdef DEBUG
-  void Print() { PrintF("ConvertToDoubleStub\n"); }
-#endif
 };
 
 
@@ -396,11 +390,11 @@ void FloatingPointHelper::LoadSmis(MacroAssembler* masm,
     __ mov(scratch1, a0);
     ConvertToDoubleStub stub1(a3, a2, scratch1, scratch2);
     __ push(ra);
-    __ Call(stub1.GetCode(), RelocInfo::CODE_TARGET);
+    __ Call(stub1.GetCode());
     // Write Smi from a1 to a1 and a0 in double format.
     __ mov(scratch1, a1);
     ConvertToDoubleStub stub2(a1, a0, scratch1, scratch2);
-    __ Call(stub2.GetCode(), RelocInfo::CODE_TARGET);
+    __ Call(stub2.GetCode());
     __ pop(ra);
   }
 }
@@ -482,7 +476,7 @@ void FloatingPointHelper::LoadNumber(MacroAssembler* masm,
     __ mov(scratch1, object);
     ConvertToDoubleStub stub(dst2, dst1, scratch1, scratch2);
     __ push(ra);
-    __ Call(stub.GetCode(), RelocInfo::CODE_TARGET);
+    __ Call(stub.GetCode());
     __ pop(ra);
   }
 
@@ -1107,7 +1101,7 @@ static void EmitSmiNonsmiComparison(MacroAssembler* masm,
     __ mov(t6, rhs);
     ConvertToDoubleStub stub1(a1, a0, t6, t5);
     __ push(ra);
-    __ Call(stub1.GetCode(), RelocInfo::CODE_TARGET);
+    __ Call(stub1.GetCode());
 
     __ pop(ra);
   }
@@ -1142,7 +1136,7 @@ static void EmitSmiNonsmiComparison(MacroAssembler* masm,
     __ mov(t6, lhs);
     ConvertToDoubleStub stub2(a3, a2, t6, t5);
     __ push(ra);
-    __ Call(stub2.GetCode(), RelocInfo::CODE_TARGET);
+    __ Call(stub2.GetCode());
     __ pop(ra);
     // Load rhs to a double in a1, a0.
     if (rhs.is(a0)) {
@@ -1803,25 +1797,17 @@ void ToBooleanStub::Generate(MacroAssembler* masm) {
 }
 
 
-const char* UnaryOpStub::GetName() {
-  if (name_ != NULL) return name_;
-  const int kMaxNameLength = 100;
-  name_ = Isolate::Current()->bootstrapper()->AllocateAutoDeletedArray(
-      kMaxNameLength);
-  if (name_ == NULL) return "OOM";
+void UnaryOpStub::PrintName(StringStream* stream) {
   const char* op_name = Token::Name(op_);
   const char* overwrite_name = NULL;  // Make g++ happy.
   switch (mode_) {
     case UNARY_NO_OVERWRITE: overwrite_name = "Alloc"; break;
     case UNARY_OVERWRITE: overwrite_name = "Overwrite"; break;
   }
-
-  OS::SNPrintF(Vector<char>(name_, kMaxNameLength),
-               "UnaryOpStub_%s_%s_%s",
-               op_name,
-               overwrite_name,
-               UnaryOpIC::GetName(operand_type_));
-  return name_;
+  stream->Add("UnaryOpStub_%s_%s_%s",
+              op_name,
+              overwrite_name,
+              UnaryOpIC::GetName(operand_type_));
 }
 
 
@@ -2160,12 +2146,7 @@ void BinaryOpStub::Generate(MacroAssembler* masm) {
 }
 
 
-const char* BinaryOpStub::GetName() {
-  if (name_ != NULL) return name_;
-  const int kMaxNameLength = 100;
-  name_ = Isolate::Current()->bootstrapper()->AllocateAutoDeletedArray(
-      kMaxNameLength);
-  if (name_ == NULL) return "OOM";
+void BinaryOpStub::PrintName(StringStream* stream) {
   const char* op_name = Token::Name(op_);
   const char* overwrite_name;
   switch (mode_) {
@@ -2174,13 +2155,10 @@ const char* BinaryOpStub::GetName() {
     case OVERWRITE_LEFT: overwrite_name = "OverwriteLeft"; break;
     default: overwrite_name = "UnknownOverwrite"; break;
   }
-
-  OS::SNPrintF(Vector<char>(name_, kMaxNameLength),
-               "BinaryOpStub_%s_%s_%s",
-               op_name,
-               overwrite_name,
-               BinaryOpIC::GetName(operands_type_));
-  return name_;
+  stream->Add("BinaryOpStub_%s_%s_%s",
+              op_name,
+              overwrite_name,
+              BinaryOpIC::GetName(operands_type_));
 }
 
 
@@ -3749,24 +3727,22 @@ void JSEntryStub::GenerateBody(MacroAssembler* masm, bool is_construct) {
   // 4 args slots
   // args
 
-  #ifdef ENABLE_LOGGING_AND_PROFILING
-    // If this is the outermost JS call, set js_entry_sp value.
-    Label non_outermost_js;
-    ExternalReference js_entry_sp(Isolate::k_js_entry_sp_address,
-                                  masm->isolate());
-    __ li(t1, Operand(ExternalReference(js_entry_sp)));
-    __ lw(t2, MemOperand(t1));
-    __ Branch(&non_outermost_js, ne, t2, Operand(zero_reg));
-    __ sw(fp, MemOperand(t1));
-    __ li(t0, Operand(Smi::FromInt(StackFrame::OUTERMOST_JSENTRY_FRAME)));
-    Label cont;
-    __ b(&cont);
-    __ nop();   // Branch delay slot nop.
-    __ bind(&non_outermost_js);
-    __ li(t0, Operand(Smi::FromInt(StackFrame::INNER_JSENTRY_FRAME)));
-    __ bind(&cont);
-    __ push(t0);
-  #endif
+  // If this is the outermost JS call, set js_entry_sp value.
+  Label non_outermost_js;
+  ExternalReference js_entry_sp(Isolate::k_js_entry_sp_address,
+                                masm->isolate());
+  __ li(t1, Operand(ExternalReference(js_entry_sp)));
+  __ lw(t2, MemOperand(t1));
+  __ Branch(&non_outermost_js, ne, t2, Operand(zero_reg));
+  __ sw(fp, MemOperand(t1));
+  __ li(t0, Operand(Smi::FromInt(StackFrame::OUTERMOST_JSENTRY_FRAME)));
+  Label cont;
+  __ b(&cont);
+  __ nop();   // Branch delay slot nop.
+  __ bind(&non_outermost_js);
+  __ li(t0, Operand(Smi::FromInt(StackFrame::INNER_JSENTRY_FRAME)));
+  __ bind(&cont);
+  __ push(t0);
 
   // Call a faked try-block that does the invoke.
   __ bal(&invoke);  // bal exposes branch delay slot.
@@ -3835,16 +3811,14 @@ void JSEntryStub::GenerateBody(MacroAssembler* masm, bool is_construct) {
   __ PopTryHandler();
 
   __ bind(&exit);  // v0 holds result
-  #ifdef ENABLE_LOGGING_AND_PROFILING
-    // Check if the current stack frame is marked as the outermost JS frame.
-    Label non_outermost_js_2;
-    __ pop(t1);
-    __ Branch(&non_outermost_js_2, ne, t1,
-              Operand(Smi::FromInt(StackFrame::OUTERMOST_JSENTRY_FRAME)));
-    __ li(t1, Operand(ExternalReference(js_entry_sp)));
-    __ sw(zero_reg, MemOperand(t1));
-    __ bind(&non_outermost_js_2);
-  #endif
+  // Check if the current stack frame is marked as the outermost JS frame.
+  Label non_outermost_js_2;
+  __ pop(t1);
+  __ Branch(&non_outermost_js_2, ne, t1,
+            Operand(Smi::FromInt(StackFrame::OUTERMOST_JSENTRY_FRAME)));
+  __ li(t1, Operand(ExternalReference(js_entry_sp)));
+  __ sw(zero_reg, MemOperand(t1));
+  __ bind(&non_outermost_js_2);
 
   // Restore the top frame descriptors from the stack.
   __ pop(t1);
@@ -4592,10 +4566,9 @@ void RegExpExecStub::Generate(MacroAssembler* masm) {
   __ movz(t9, t0, a0);  // If UC16 (a0 is 0), replace t9 w/kDataUC16CodeOffset.
 
   // Check that the irregexp code has been generated for the actual string
-  // encoding. If it has, the field contains a code object otherwise it
-  // contains the hole.
-  __ GetObjectType(t9, a0, a0);
-  __ Branch(&runtime, ne, a0, Operand(CODE_TYPE));
+  // encoding. If it has, the field contains a code object otherwise it contains
+  // a smi (code flushing support).
+  __ JumpIfSmi(t9, &runtime);
 
   // a3: encoding of subject string (1 if ASCII, 0 if two_byte);
   // t9: code
@@ -4947,16 +4920,9 @@ void CallFunctionStub::Generate(MacroAssembler* masm) {
 
 // Unfortunately you have to run without snapshots to see most of these
 // names in the profile since most compare stubs end up in the snapshot.
-const char* CompareStub::GetName() {
+void CompareStub::PrintName(StringStream* stream) {
   ASSERT((lhs_.is(a0) && rhs_.is(a1)) ||
          (lhs_.is(a1) && rhs_.is(a0)));
-
-  if (name_ != NULL) return name_;
-  const int kMaxNameLength = 100;
-  name_ = Isolate::Current()->bootstrapper()->AllocateAutoDeletedArray(
-      kMaxNameLength);
-  if (name_ == NULL) return "OOM";
-
   const char* cc_name;
   switch (cc_) {
     case lt: cc_name = "LT"; break;
@@ -4967,40 +4933,14 @@ const char* CompareStub::GetName() {
     case ne: cc_name = "NE"; break;
     default: cc_name = "UnknownCondition"; break;
   }
-
-  const char* lhs_name = lhs_.is(a0) ? "_a0" : "_a1";
-  const char* rhs_name = rhs_.is(a0) ? "_a0" : "_a1";
-
-  const char* strict_name = "";
-  if (strict_ && (cc_ == eq || cc_ == ne)) {
-    strict_name = "_STRICT";
-  }
-
-  const char* never_nan_nan_name = "";
-  if (never_nan_nan_ && (cc_ == eq || cc_ == ne)) {
-    never_nan_nan_name = "_NO_NAN";
-  }
-
-  const char* include_number_compare_name = "";
-  if (!include_number_compare_) {
-    include_number_compare_name = "_NO_NUMBER";
-  }
-
-  const char* include_smi_compare_name = "";
-  if (!include_smi_compare_) {
-    include_smi_compare_name = "_NO_SMI";
-  }
-
-  OS::SNPrintF(Vector<char>(name_, kMaxNameLength),
-               "CompareStub_%s%s%s%s%s%s",
-               cc_name,
-               lhs_name,
-               rhs_name,
-               strict_name,
-               never_nan_nan_name,
-               include_number_compare_name,
-               include_smi_compare_name);
-  return name_;
+  bool is_equality = cc_ == eq || cc_ == ne;
+  stream->Add("CompareStub_%s", cc_name);
+  stream->Add(lhs_.is(a0) ? "_a0" : "_a1");
+  stream->Add(rhs_.is(a0) ? "_a0" : "_a1");
+  if (strict_ && is_equality) stream->Add("_STRICT");
+  if (never_nan_nan_ && is_equality) stream->Add("_NO_NAN");
+  if (!include_number_compare_) stream->Add("_NO_NUMBER");
+  if (!include_smi_compare_) stream->Add("_NO_SMI");
 }
 
 
diff --git a/deps/v8/src/mips/code-stubs-mips.h b/deps/v8/src/mips/code-stubs-mips.h
index 6c70bdd70a..aa224bcfa6 100644
--- a/deps/v8/src/mips/code-stubs-mips.h
+++ b/deps/v8/src/mips/code-stubs-mips.h
@@ -66,8 +66,7 @@ class UnaryOpStub: public CodeStub {
               UnaryOpIC::TypeInfo operand_type = UnaryOpIC::UNINITIALIZED)
       : op_(op),
         mode_(mode),
-        operand_type_(operand_type),
-        name_(NULL) {
+        operand_type_(operand_type) {
   }
 
  private:
@@ -77,19 +76,7 @@ class UnaryOpStub: public CodeStub {
   // Operand type information determined at runtime.
   UnaryOpIC::TypeInfo operand_type_;
 
-  char* name_;
-
-  const char* GetName();
-
-#ifdef DEBUG
-  void Print() {
-    PrintF("UnaryOpStub %d (op %s), (mode %d, runtime_type_info %s)\n",
-           MinorKey(),
-           Token::String(op_),
-           static_cast<int>(mode_),
-           UnaryOpIC::GetName(operand_type_));
-  }
-#endif
+  virtual void PrintName(StringStream* stream);
 
   class ModeBits: public BitField<UnaryOverwriteMode, 0, 1> {};
   class OpBits: public BitField<Token::Value, 1, 7> {};
@@ -143,8 +130,7 @@ class BinaryOpStub: public CodeStub {
       : op_(op),
         mode_(mode),
         operands_type_(BinaryOpIC::UNINITIALIZED),
-        result_type_(BinaryOpIC::UNINITIALIZED),
-        name_(NULL) {
+        result_type_(BinaryOpIC::UNINITIALIZED) {
     use_fpu_ = CpuFeatures::IsSupported(FPU);
     ASSERT(OpBits::is_valid(Token::NUM_TOKENS));
   }
@@ -157,8 +143,7 @@ class BinaryOpStub: public CodeStub {
         mode_(ModeBits::decode(key)),
         use_fpu_(FPUBits::decode(key)),
         operands_type_(operands_type),
-        result_type_(result_type),
-        name_(NULL) { }
+        result_type_(result_type) { }
 
  private:
   enum SmiCodeGenerateHeapNumberResults {
@@ -174,20 +159,7 @@ class BinaryOpStub: public CodeStub {
   BinaryOpIC::TypeInfo operands_type_;
   BinaryOpIC::TypeInfo result_type_;
 
-  char* name_;
-
-  const char* GetName();
-
-#ifdef DEBUG
-  void Print() {
-    PrintF("BinaryOpStub %d (op %s), "
-           "(mode %d, runtime_type_info %s)\n",
-           MinorKey(),
-           Token::String(op_),
-           static_cast<int>(mode_),
-           BinaryOpIC::GetName(operands_type_));
-  }
-#endif
+  virtual void PrintName(StringStream* stream);
 
   // Minor key encoding in 16 bits RRRTTTVOOOOOOOMM.
   class ModeBits: public BitField<OverwriteMode, 0, 2> {};
@@ -374,12 +346,6 @@ class WriteInt32ToHeapNumberStub : public CodeStub {
   }
 
   void Generate(MacroAssembler* masm);
-
-  const char* GetName() { return "WriteInt32ToHeapNumberStub"; }
-
-#ifdef DEBUG
-  void Print() { PrintF("WriteInt32ToHeapNumberStub\n"); }
-#endif
 };
 
 
@@ -406,14 +372,6 @@ class NumberToStringStub: public CodeStub {
   int MinorKey() { return 0; }
 
   void Generate(MacroAssembler* masm);
-
-  const char* GetName() { return "NumberToStringStub"; }
-
-#ifdef DEBUG
-  void Print() {
-    PrintF("NumberToStringStub\n");
-  }
-#endif
 };
 
 
@@ -431,8 +389,6 @@ class RegExpCEntryStub: public CodeStub {
   int MinorKey() { return 0; }
 
   bool NeedsImmovableCode() { return true; }
-
-  const char* GetName() { return "RegExpCEntryStub"; }
 };
 
 // Trampoline stub to call into native code. To call safely into native code
@@ -453,8 +409,6 @@ class DirectCEntryStub: public CodeStub {
   int MinorKey() { return 0; }
 
   bool NeedsImmovableCode() { return true; }
-
-  const char* GetName() { return "DirectCEntryStub"; }
 };
 
 class FloatingPointHelper : public AllStatic {
@@ -636,13 +590,6 @@ class StringDictionaryLookupStub: public CodeStub {
       StringDictionary::kHeaderSize +
       StringDictionary::kElementsStartIndex * kPointerSize;
 
-
-#ifdef DEBUG
-  void Print() {
-    PrintF("StringDictionaryLookupStub\n");
-  }
-#endif
-
   Major MajorKey() { return StringDictionaryNegativeLookup; }
 
   int MinorKey() {
diff --git a/deps/v8/src/mips/codegen-mips.h b/deps/v8/src/mips/codegen-mips.h
index fecd321fad..a8de9c8610 100644
--- a/deps/v8/src/mips/codegen-mips.h
+++ b/deps/v8/src/mips/codegen-mips.h
@@ -60,9 +60,7 @@ class CodeGenerator: public AstVisitor {
   // Print the code after compiling it.
   static void PrintCode(Handle<Code> code, CompilationInfo* info);
 
-#ifdef ENABLE_LOGGING_AND_PROFILING
   static bool ShouldGenerateLog(Expression* type);
-#endif
 
   static void SetFunctionInfo(Handle<JSFunction> fun,
                               FunctionLiteral* lit,
diff --git a/deps/v8/src/mips/full-codegen-mips.cc b/deps/v8/src/mips/full-codegen-mips.cc
index 5b9bbb5789..3f5ea7b914 100644
--- a/deps/v8/src/mips/full-codegen-mips.cc
+++ b/deps/v8/src/mips/full-codegen-mips.cc
@@ -783,7 +783,7 @@ void FullCodeGenerator::EmitDeclaration(Variable* variable,
       // IDs for bailouts from optimized code.
       ASSERT(prop->obj()->AsVariableProxy() != NULL);
       { AccumulatorValueContext for_object(this);
-        EmitVariableLoad(prop->obj()->AsVariableProxy()->var());
+        EmitVariableLoad(prop->obj()->AsVariableProxy());
       }
 
       __ push(result_register());
@@ -798,7 +798,7 @@ void FullCodeGenerator::EmitDeclaration(Variable* variable,
       Handle<Code> ic = is_strict_mode()
           ? isolate()->builtins()->KeyedStoreIC_Initialize_Strict()
           : isolate()->builtins()->KeyedStoreIC_Initialize();
-      __ CallWithAstId(ic);
+      __ Call(ic);
       // Value in v0 is ignored (declarations are statements).
     }
   }
@@ -873,7 +873,7 @@ void FullCodeGenerator::VisitSwitchStatement(SwitchStatement* stmt) {
     // Record position before stub call for type feedback.
     SetSourcePosition(clause->position());
     Handle<Code> ic = CompareIC::GetUninitialized(Token::EQ_STRICT);
-    __ CallWithAstId(ic, RelocInfo::CODE_TARGET, clause->CompareId());
+    __ Call(ic, RelocInfo::CODE_TARGET, clause->CompareId());
     patch_site.EmitPatchInfo();
 
     __ Branch(&next_test, ne, v0, Operand(zero_reg));
@@ -1117,7 +1117,7 @@ void FullCodeGenerator::EmitNewClosure(Handle<SharedFunctionInfo> info,
 
 void FullCodeGenerator::VisitVariableProxy(VariableProxy* expr) {
   Comment cmnt(masm_, "[ VariableProxy");
-  EmitVariableLoad(expr->var());
+  EmitVariableLoad(expr);
 }
 
 
@@ -1173,7 +1173,7 @@ void FullCodeGenerator::EmitLoadGlobalSlotCheckExtensions(
       ? RelocInfo::CODE_TARGET
       : RelocInfo::CODE_TARGET_CONTEXT;
   Handle<Code> ic = isolate()->builtins()->LoadIC_Initialize();
-  __ CallWithAstId(ic, mode);
+  __ Call(ic, mode);
 }
 
 
@@ -1253,7 +1253,7 @@ void FullCodeGenerator::EmitDynamicLoadFromSlotFastCase(
           __ li(a0, Operand(key_literal->handle()));
           Handle<Code> ic =
               isolate()->builtins()->KeyedLoadIC_Initialize();
-          __ CallWithAstId(ic, RelocInfo::CODE_TARGET, GetPropertyId(property));
+          __ Call(ic, RelocInfo::CODE_TARGET, GetPropertyId(property));
           __ Branch(done);
         }
       }
@@ -1262,7 +1262,11 @@ void FullCodeGenerator::EmitDynamicLoadFromSlotFastCase(
 }
 
 
-void FullCodeGenerator::EmitVariableLoad(Variable* var) {
+void FullCodeGenerator::EmitVariableLoad(VariableProxy* proxy) {
+  // Record position before possible IC call.
+  SetSourcePosition(proxy->position());
+  Variable* var = proxy->var();
+
   // Three cases: non-this global variables, lookup slots, and all other
   // types of slots.
   Slot* slot = var->AsSlot();
@@ -1275,7 +1279,7 @@ void FullCodeGenerator::EmitVariableLoad(Variable* var) {
     __ lw(a0, GlobalObjectOperand());
     __ li(a2, Operand(var->name()));
     Handle<Code> ic = isolate()->builtins()->LoadIC_Initialize();
-    __ CallWithAstId(ic, RelocInfo::CODE_TARGET_CONTEXT);
+    __ Call(ic, RelocInfo::CODE_TARGET_CONTEXT);
     context()->Plug(v0);
 
   } else if (slot->type() == Slot::LOOKUP) {
@@ -1421,7 +1425,7 @@ void FullCodeGenerator::VisitObjectLiteral(ObjectLiteral* expr) {
             Handle<Code> ic = is_strict_mode()
                 ? isolate()->builtins()->StoreIC_Initialize_Strict()
                 : isolate()->builtins()->StoreIC_Initialize();
-            __ CallWithAstId(ic, RelocInfo::CODE_TARGET, key->id());
+            __ Call(ic, RelocInfo::CODE_TARGET, key->id());
             PrepareForBailoutForId(key->id(), NO_REGISTERS);
           } else {
             VisitForEffect(value);
@@ -1598,7 +1602,7 @@ void FullCodeGenerator::VisitAssignment(Assignment* expr) {
     { AccumulatorValueContext context(this);
       switch (assign_type) {
         case VARIABLE:
-          EmitVariableLoad(expr->target()->AsVariableProxy()->var());
+          EmitVariableLoad(expr->target()->AsVariableProxy());
           PrepareForBailout(expr->target(), TOS_REG);
           break;
         case NAMED_PROPERTY:
@@ -1665,7 +1669,7 @@ void FullCodeGenerator::EmitNamedPropertyLoad(Property* prop) {
   __ li(a2, Operand(key->handle()));
   // Call load IC. It has arguments receiver and property name a0 and a2.
   Handle<Code> ic = isolate()->builtins()->LoadIC_Initialize();
-  __ CallWithAstId(ic, RelocInfo::CODE_TARGET, GetPropertyId(prop));
+  __ Call(ic, RelocInfo::CODE_TARGET, GetPropertyId(prop));
 }
 
 
@@ -1674,7 +1678,7 @@ void FullCodeGenerator::EmitKeyedPropertyLoad(Property* prop) {
   __ mov(a0, result_register());
   // Call keyed load IC. It has arguments key and receiver in a0 and a1.
   Handle<Code> ic = isolate()->builtins()->KeyedLoadIC_Initialize();
-  __ CallWithAstId(ic, RelocInfo::CODE_TARGET, GetPropertyId(prop));
+  __ Call(ic, RelocInfo::CODE_TARGET, GetPropertyId(prop));
 }
 
 
@@ -1702,7 +1706,7 @@ void FullCodeGenerator::EmitInlineSmiBinaryOp(BinaryOperation* expr,
 
   __ bind(&stub_call);
   BinaryOpStub stub(op, mode);
-  __ CallWithAstId(stub.GetCode(), RelocInfo::CODE_TARGET, expr->id());
+  __ Call(stub.GetCode(), RelocInfo::CODE_TARGET, expr->id());
   patch_site.EmitPatchInfo();
   __ jmp(&done);
 
@@ -1785,7 +1789,7 @@ void FullCodeGenerator::EmitBinaryOp(BinaryOperation* expr,
   __ pop(a1);
   BinaryOpStub stub(op, mode);
   JumpPatchSite patch_site(masm_);    // unbound, signals no inlined smi code.
-  __ CallWithAstId(stub.GetCode(), RelocInfo::CODE_TARGET, expr->id());
+  __ Call(stub.GetCode(), RelocInfo::CODE_TARGET, expr->id());
   patch_site.EmitPatchInfo();
   context()->Plug(v0);
 }
@@ -1826,7 +1830,7 @@ void FullCodeGenerator::EmitAssignment(Expression* expr, int bailout_ast_id) {
       Handle<Code> ic = is_strict_mode()
           ? isolate()->builtins()->StoreIC_Initialize_Strict()
           : isolate()->builtins()->StoreIC_Initialize();
-      __ CallWithAstId(ic);
+      __ Call(ic);
       break;
     }
     case KEYED_PROPERTY: {
@@ -1839,7 +1843,7 @@ void FullCodeGenerator::EmitAssignment(Expression* expr, int bailout_ast_id) {
       Handle<Code> ic = is_strict_mode()
         ? isolate()->builtins()->KeyedStoreIC_Initialize_Strict()
         : isolate()->builtins()->KeyedStoreIC_Initialize();
-      __ CallWithAstId(ic);
+      __ Call(ic);
       break;
     }
   }
@@ -1864,7 +1868,7 @@ void FullCodeGenerator::EmitVariableAssignment(Variable* var,
     Handle<Code> ic = is_strict_mode()
         ? isolate()->builtins()->StoreIC_Initialize_Strict()
         : isolate()->builtins()->StoreIC_Initialize();
-    __ CallWithAstId(ic, RelocInfo::CODE_TARGET_CONTEXT);
+    __ Call(ic, RelocInfo::CODE_TARGET_CONTEXT);
 
   } else if (op == Token::INIT_CONST) {
     // Like var declarations, const declarations are hoisted to function
@@ -1962,7 +1966,7 @@ void FullCodeGenerator::EmitNamedPropertyAssignment(Assignment* expr) {
   Handle<Code> ic = is_strict_mode()
         ? isolate()->builtins()->StoreIC_Initialize_Strict()
         : isolate()->builtins()->StoreIC_Initialize();
-  __ CallWithAstId(ic, RelocInfo::CODE_TARGET, expr->id());
+  __ Call(ic, RelocInfo::CODE_TARGET, expr->id());
 
   // If the assignment ends an initialization block, revert to fast case.
   if (expr->ends_initialization_block()) {
@@ -2014,7 +2018,7 @@ void FullCodeGenerator::EmitKeyedPropertyAssignment(Assignment* expr) {
   Handle<Code> ic = is_strict_mode()
       ? isolate()->builtins()->KeyedStoreIC_Initialize_Strict()
       : isolate()->builtins()->KeyedStoreIC_Initialize();
-  __ CallWithAstId(ic, RelocInfo::CODE_TARGET, expr->id());
+  __ Call(ic, RelocInfo::CODE_TARGET, expr->id());
 
   // If the assignment ends an initialization block, revert to fast case.
   if (expr->ends_initialization_block()) {
@@ -2067,7 +2071,7 @@ void FullCodeGenerator::EmitCallWithIC(Call* expr,
   InLoopFlag in_loop = (loop_depth() > 0) ? IN_LOOP : NOT_IN_LOOP;
   Handle<Code> ic =
       isolate()->stub_cache()->ComputeCallInitialize(arg_count, in_loop, mode);
-  __ CallWithAstId(ic, mode, expr->id());
+  __ Call(ic, mode, expr->id());
   RecordJSReturnSite(expr);
   // Restore context register.
   __ lw(cp, MemOperand(fp, StandardFrameConstants::kContextOffset));
@@ -2101,7 +2105,7 @@ void FullCodeGenerator::EmitKeyedCallWithIC(Call* expr,
   Handle<Code> ic =
       isolate()->stub_cache()->ComputeKeyedCallInitialize(arg_count, in_loop);
   __ lw(a2, MemOperand(sp, (arg_count + 1) * kPointerSize));  // Key.
-  __ CallWithAstId(ic, RelocInfo::CODE_TARGET, expr->id());
+  __ Call(ic, RelocInfo::CODE_TARGET, expr->id());
   RecordJSReturnSite(expr);
   // Restore context register.
   __ lw(cp, MemOperand(fp, StandardFrameConstants::kContextOffset));
@@ -2301,7 +2305,7 @@ void FullCodeGenerator::VisitCall(Call* expr) {
         SetSourcePosition(prop->position());
 
         Handle<Code> ic = isolate()->builtins()->KeyedLoadIC_Initialize();
-        __ CallWithAstId(ic, RelocInfo::CODE_TARGET, GetPropertyId(prop));
+        __ Call(ic, RelocInfo::CODE_TARGET, GetPropertyId(prop));
         __ lw(a1, GlobalObjectOperand());
         __ lw(a1, FieldMemOperand(a1, GlobalObject::kGlobalReceiverOffset));
         __ Push(v0, a1);  // Function, receiver.
@@ -2780,13 +2784,12 @@ void FullCodeGenerator::EmitLog(ZoneList<Expression*>* args) {
   //     with '%2s' (see Logger::LogRuntime for all the formats).
   //   2 (array): Arguments to the format string.
   ASSERT_EQ(args->length(), 3);
-#ifdef ENABLE_LOGGING_AND_PROFILING
   if (CodeGenerator::ShouldGenerateLog(args->at(0))) {
     VisitForStackValue(args->at(1));
     VisitForStackValue(args->at(2));
     __ CallRuntime(Runtime::kLog, 2);
   }
-#endif
+
   // Finally, we're expected to leave a value on the top of the stack.
   __ LoadRoot(v0, Heap::kUndefinedValueRootIndex);
   context()->Plug(v0);
@@ -3664,7 +3667,7 @@ void FullCodeGenerator::VisitCallRuntime(CallRuntime* expr) {
         isolate()->stub_cache()->ComputeCallInitialize(arg_count,
                                                        NOT_IN_LOOP,
                                                        mode);
-    __ CallWithAstId(ic, mode, expr->id());
+    __ Call(ic, mode, expr->id());
     // Restore context register.
     __ lw(cp, MemOperand(fp, StandardFrameConstants::kContextOffset));
   } else {
@@ -3807,7 +3810,7 @@ void FullCodeGenerator::EmitUnaryOperation(UnaryOperation* expr,
   VisitForAccumulatorValue(expr->expression());
   SetSourcePosition(expr->position());
   __ mov(a0, result_register());
-  __ CallWithAstId(stub.GetCode(), RelocInfo::CODE_TARGET, expr->id());
+  __ Call(stub.GetCode(), RelocInfo::CODE_TARGET, expr->id());
   context()->Plug(v0);
 }
 
@@ -3839,7 +3842,7 @@ void FullCodeGenerator::VisitCountOperation(CountOperation* expr) {
   if (assign_type == VARIABLE) {
     ASSERT(expr->expression()->AsVariableProxy()->var() != NULL);
     AccumulatorValueContext context(this);
-    EmitVariableLoad(expr->expression()->AsVariableProxy()->var());
+    EmitVariableLoad(expr->expression()->AsVariableProxy());
   } else {
     // Reserve space for result of postfix operation.
     if (expr->is_postfix() && !context()->IsEffect()) {
@@ -3918,7 +3921,7 @@ void FullCodeGenerator::VisitCountOperation(CountOperation* expr) {
   SetSourcePosition(expr->position());
 
   BinaryOpStub stub(Token::ADD, NO_OVERWRITE);
-  __ CallWithAstId(stub.GetCode(), RelocInfo::CODE_TARGET, expr->CountId());
+  __ Call(stub.GetCode(), RelocInfo::CODE_TARGET, expr->CountId());
   patch_site.EmitPatchInfo();
   __ bind(&done);
 
@@ -3951,7 +3954,7 @@ void FullCodeGenerator::VisitCountOperation(CountOperation* expr) {
       Handle<Code> ic = is_strict_mode()
           ? isolate()->builtins()->StoreIC_Initialize_Strict()
           : isolate()->builtins()->StoreIC_Initialize();
-      __ CallWithAstId(ic, RelocInfo::CODE_TARGET, expr->id());
+      __ Call(ic, RelocInfo::CODE_TARGET, expr->id());
       PrepareForBailoutForId(expr->AssignmentId(), TOS_REG);
       if (expr->is_postfix()) {
         if (!context()->IsEffect()) {
@@ -3969,7 +3972,7 @@ void FullCodeGenerator::VisitCountOperation(CountOperation* expr) {
       Handle<Code> ic = is_strict_mode()
           ? isolate()->builtins()->KeyedStoreIC_Initialize_Strict()
           : isolate()->builtins()->KeyedStoreIC_Initialize();
-      __ CallWithAstId(ic, RelocInfo::CODE_TARGET, expr->id());
+      __ Call(ic, RelocInfo::CODE_TARGET, expr->id());
       PrepareForBailoutForId(expr->AssignmentId(), TOS_REG);
       if (expr->is_postfix()) {
         if (!context()->IsEffect()) {
@@ -3993,7 +3996,7 @@ void FullCodeGenerator::VisitForTypeofValue(Expression* expr) {
     Handle<Code> ic = isolate()->builtins()->LoadIC_Initialize();
     // Use a regular load, not a contextual load, to avoid a reference
     // error.
-    __ CallWithAstId(ic);
+    __ Call(ic);
     PrepareForBailout(expr, TOS_REG);
     context()->Plug(v0);
   } else if (proxy != NULL &&
@@ -4190,7 +4193,7 @@ void FullCodeGenerator::VisitCompareOperation(CompareOperation* expr) {
       // Record position and call the compare IC.
       SetSourcePosition(expr->position());
       Handle<Code> ic = CompareIC::GetUninitialized(op);
-      __ CallWithAstId(ic, RelocInfo::CODE_TARGET, expr->id());
+      __ Call(ic, RelocInfo::CODE_TARGET, expr->id());
       patch_site.EmitPatchInfo();
       PrepareForBailoutBeforeSplit(TOS_REG, true, if_true, if_false);
       Split(cc, v0, Operand(zero_reg), if_true, if_false, fall_through);
diff --git a/deps/v8/src/mips/ic-mips.cc b/deps/v8/src/mips/ic-mips.cc
index cbae8e46e6..da39962691 100644
--- a/deps/v8/src/mips/ic-mips.cc
+++ b/deps/v8/src/mips/ic-mips.cc
@@ -214,115 +214,6 @@ static void GenerateDictionaryStore(MacroAssembler* masm,
 }
 
 
-static void GenerateNumberDictionaryLoad(MacroAssembler* masm,
-                                         Label* miss,
-                                         Register elements,
-                                         Register key,
-                                         Register result,
-                                         Register reg0,
-                                         Register reg1,
-                                         Register reg2) {
-  // Register use:
-  //
-  // elements - holds the slow-case elements of the receiver on entry.
-  //            Unchanged unless 'result' is the same register.
-  //
-  // key      - holds the smi key on entry.
-  //            Unchanged unless 'result' is the same register.
-  //
-  //
-  // result   - holds the result on exit if the load succeeded.
-  //            Allowed to be the same as 'key' or 'result'.
-  //            Unchanged on bailout so 'key' or 'result' can be used
-  //            in further computation.
-  //
-  // Scratch registers:
-  //
-  // reg0 - holds the untagged key on entry and holds the hash once computed.
-  //
-  // reg1 - Used to hold the capacity mask of the dictionary.
-  //
-  // reg2 - Used for the index into the dictionary.
-  // at   - Temporary (avoid MacroAssembler instructions also using 'at').
-  Label done;
-
-  // Compute the hash code from the untagged key.  This must be kept in sync
-  // with ComputeIntegerHash in utils.h.
-  //
-  // hash = ~hash + (hash << 15);
-  __ nor(reg1, reg0, zero_reg);
-  __ sll(at, reg0, 15);
-  __ addu(reg0, reg1, at);
-
-  // hash = hash ^ (hash >> 12);
-  __ srl(at, reg0, 12);
-  __ xor_(reg0, reg0, at);
-
-  // hash = hash + (hash << 2);
-  __ sll(at, reg0, 2);
-  __ addu(reg0, reg0, at);
-
-  // hash = hash ^ (hash >> 4);
-  __ srl(at, reg0, 4);
-  __ xor_(reg0, reg0, at);
-
-  // hash = hash * 2057;
-  __ li(reg1, Operand(2057));
-  __ mul(reg0, reg0, reg1);
-
-  // hash = hash ^ (hash >> 16);
-  __ srl(at, reg0, 16);
-  __ xor_(reg0, reg0, at);
-
-  // Compute the capacity mask.
-  __ lw(reg1, FieldMemOperand(elements, NumberDictionary::kCapacityOffset));
-  __ sra(reg1, reg1, kSmiTagSize);
-  __ Subu(reg1, reg1, Operand(1));
-
-  // Generate an unrolled loop that performs a few probes before giving up.
-  static const int kProbes = 4;
-  for (int i = 0; i < kProbes; i++) {
-    // Use reg2 for index calculations and keep the hash intact in reg0.
-    __ mov(reg2, reg0);
-    // Compute the masked index: (hash + i + i * i) & mask.
-    if (i > 0) {
-      __ Addu(reg2, reg2, Operand(NumberDictionary::GetProbeOffset(i)));
-    }
-    __ and_(reg2, reg2, reg1);
-
-    // Scale the index by multiplying by the element size.
-    ASSERT(NumberDictionary::kEntrySize == 3);
-    __ sll(at, reg2, 1);  // 2x.
-    __ addu(reg2, reg2, at);  // reg2 = reg2 * 3.
-
-    // Check if the key is identical to the name.
-    __ sll(at, reg2, kPointerSizeLog2);
-    __ addu(reg2, elements, at);
-
-    __ lw(at, FieldMemOperand(reg2, NumberDictionary::kElementsStartOffset));
-    if (i != kProbes - 1) {
-      __ Branch(&done, eq, key, Operand(at));
-    } else {
-      __ Branch(miss, ne, key, Operand(at));
-    }
-  }
-
-  __ bind(&done);
-  // Check that the value is a normal property.
-  // reg2: elements + (index * kPointerSize).
-  const int kDetailsOffset =
-      NumberDictionary::kElementsStartOffset + 2 * kPointerSize;
-  __ lw(reg1, FieldMemOperand(reg2, kDetailsOffset));
-  __ And(at, reg1, Operand(Smi::FromInt(PropertyDetails::TypeField::mask())));
-  __ Branch(miss, ne, at, Operand(zero_reg));
-
-  // Get the value at the masked, scaled index and return.
-  const int kValueOffset =
-      NumberDictionary::kElementsStartOffset + kPointerSize;
-  __ lw(result, FieldMemOperand(reg2, kValueOffset));
-}
-
-
 void LoadIC::GenerateArrayLength(MacroAssembler* masm) {
   // ----------- S t a t e -------------
   //  -- a2    : name
@@ -751,7 +642,7 @@ void KeyedCallIC::GenerateMegamorphic(MacroAssembler* masm, int argc) {
   __ Branch(&slow_load, ne, a3, Operand(at));
   __ sra(a0, a2, kSmiTagSize);
   // a0: untagged index
-  GenerateNumberDictionaryLoad(masm, &slow_load, t0, a2, a1, a0, a3, t1);
+  __ LoadFromNumberDictionary(&slow_load, t0, a2, a1, a0, a3, t1);
   __ IncrementCounter(counters->keyed_call_generic_smi_dict(), 1, a0, a3);
   __ jmp(&do_call);
 
@@ -963,6 +854,9 @@ static MemOperand GenerateUnmappedArgumentsLookup(MacroAssembler* masm,
   const int kBackingStoreOffset = FixedArray::kHeaderSize + kPointerSize;
   Register backing_store = parameter_map;
   __ lw(backing_store, FieldMemOperand(parameter_map, kBackingStoreOffset));
+  Handle<Map> fixed_array_map(masm->isolate()->heap()->fixed_array_map());
+  __ CheckMap(backing_store, scratch, fixed_array_map, slow_case,
+              DONT_DO_SMI_CHECK);
   __ lw(scratch, FieldMemOperand(backing_store, FixedArray::kLengthOffset));
   __ Branch(slow_case, Ugreater_equal, key, Operand(scratch));
   __ li(scratch, Operand(kPointerSize >> 1));
@@ -1136,7 +1030,7 @@ void KeyedLoadIC::GenerateGeneric(MacroAssembler* masm) {
   __ LoadRoot(at, Heap::kHashTableMapRootIndex);
   __ Branch(&slow, ne, a3, Operand(at));
   __ sra(a2, a0, kSmiTagSize);
-  GenerateNumberDictionaryLoad(masm, &slow, t0, a0, v0, a2, a3, t1);
+  __ LoadFromNumberDictionary(&slow, t0, a0, v0, a2, a3, t1);
   __ Ret();
 
   // Slow case, key and receiver still in a0 and a1.
diff --git a/deps/v8/src/mips/macro-assembler-mips.cc b/deps/v8/src/mips/macro-assembler-mips.cc
index 7c085baac0..712ceec957 100644
--- a/deps/v8/src/mips/macro-assembler-mips.cc
+++ b/deps/v8/src/mips/macro-assembler-mips.cc
@@ -50,87 +50,6 @@ MacroAssembler::MacroAssembler(Isolate* arg_isolate, void* buffer, int size)
 }
 
 
-// Arguments macros.
-#define COND_TYPED_ARGS Condition cond, Register r1, const Operand& r2
-#define COND_ARGS cond, r1, r2
-
-#define REGISTER_TARGET_BODY(Name) \
-void MacroAssembler::Name(Register target, \
-                          BranchDelaySlot bd) { \
-  Name(Operand(target), bd); \
-} \
-void MacroAssembler::Name(Register target, COND_TYPED_ARGS, \
-                          BranchDelaySlot bd) { \
-  Name(Operand(target), COND_ARGS, bd); \
-}
-
-
-#define INT_PTR_TARGET_BODY(Name) \
-void MacroAssembler::Name(intptr_t target, RelocInfo::Mode rmode, \
-                          BranchDelaySlot bd) { \
-  Name(Operand(target, rmode), bd); \
-} \
-void MacroAssembler::Name(intptr_t target, \
-                          RelocInfo::Mode rmode, \
-                          COND_TYPED_ARGS, \
-                          BranchDelaySlot bd) { \
-  Name(Operand(target, rmode), COND_ARGS, bd); \
-}
-
-
-#define BYTE_PTR_TARGET_BODY(Name) \
-void MacroAssembler::Name(byte* target, RelocInfo::Mode rmode, \
-                          BranchDelaySlot bd) { \
-  Name(reinterpret_cast<intptr_t>(target), rmode, bd); \
-} \
-void MacroAssembler::Name(byte* target, \
-                          RelocInfo::Mode rmode, \
-                          COND_TYPED_ARGS, \
-                          BranchDelaySlot bd) { \
-  Name(reinterpret_cast<intptr_t>(target), rmode, COND_ARGS, bd); \
-}
-
-
-#define CODE_TARGET_BODY(Name) \
-void MacroAssembler::Name(Handle<Code> target, RelocInfo::Mode rmode, \
-                          BranchDelaySlot bd) { \
-  Name(reinterpret_cast<intptr_t>(target.location()), rmode, bd); \
-} \
-void MacroAssembler::Name(Handle<Code> target, \
-                          RelocInfo::Mode rmode, \
-                          COND_TYPED_ARGS, \
-                          BranchDelaySlot bd) { \
-  Name(reinterpret_cast<intptr_t>(target.location()), rmode, COND_ARGS, bd); \
-}
-
-
-REGISTER_TARGET_BODY(Jump)
-REGISTER_TARGET_BODY(Call)
-INT_PTR_TARGET_BODY(Jump)
-INT_PTR_TARGET_BODY(Call)
-BYTE_PTR_TARGET_BODY(Jump)
-BYTE_PTR_TARGET_BODY(Call)
-CODE_TARGET_BODY(Jump)
-CODE_TARGET_BODY(Call)
-
-#undef COND_TYPED_ARGS
-#undef COND_ARGS
-#undef REGISTER_TARGET_BODY
-#undef BYTE_PTR_TARGET_BODY
-#undef CODE_TARGET_BODY
-
-
-void MacroAssembler::Ret(BranchDelaySlot bd) {
-  Jump(Operand(ra), bd);
-}
-
-
-void MacroAssembler::Ret(Condition cond, Register r1, const Operand& r2,
-    BranchDelaySlot bd) {
-  Jump(Operand(ra), cond, r1, r2, bd);
-}
-
-
 void MacroAssembler::LoadRoot(Register destination,
                               Heap::RootListIndex index) {
   lw(destination, MemOperand(s6, index << kPointerSizeLog2));
@@ -424,6 +343,114 @@ void MacroAssembler::CheckAccessGlobalProxy(Register holder_reg,
 }
 
 
+void MacroAssembler::LoadFromNumberDictionary(Label* miss,
+                                              Register elements,
+                                              Register key,
+                                              Register result,
+                                              Register reg0,
+                                              Register reg1,
+                                              Register reg2) {
+  // Register use:
+  //
+  // elements - holds the slow-case elements of the receiver on entry.
+  //            Unchanged unless 'result' is the same register.
+  //
+  // key      - holds the smi key on entry.
+  //            Unchanged unless 'result' is the same register.
+  //
+  //
+  // result   - holds the result on exit if the load succeeded.
+  //            Allowed to be the same as 'key' or 'result'.
+  //            Unchanged on bailout so 'key' or 'result' can be used
+  //            in further computation.
+  //
+  // Scratch registers:
+  //
+  // reg0 - holds the untagged key on entry and holds the hash once computed.
+  //
+  // reg1 - Used to hold the capacity mask of the dictionary.
+  //
+  // reg2 - Used for the index into the dictionary.
+  // at   - Temporary (avoid MacroAssembler instructions also using 'at').
+  Label done;
+
+  // Compute the hash code from the untagged key.  This must be kept in sync
+  // with ComputeIntegerHash in utils.h.
+  //
+  // hash = ~hash + (hash << 15);
+  nor(reg1, reg0, zero_reg);
+  sll(at, reg0, 15);
+  addu(reg0, reg1, at);
+
+  // hash = hash ^ (hash >> 12);
+  srl(at, reg0, 12);
+  xor_(reg0, reg0, at);
+
+  // hash = hash + (hash << 2);
+  sll(at, reg0, 2);
+  addu(reg0, reg0, at);
+
+  // hash = hash ^ (hash >> 4);
+  srl(at, reg0, 4);
+  xor_(reg0, reg0, at);
+
+  // hash = hash * 2057;
+  li(reg1, Operand(2057));
+  mul(reg0, reg0, reg1);
+
+  // hash = hash ^ (hash >> 16);
+  srl(at, reg0, 16);
+  xor_(reg0, reg0, at);
+
+  // Compute the capacity mask.
+  lw(reg1, FieldMemOperand(elements, NumberDictionary::kCapacityOffset));
+  sra(reg1, reg1, kSmiTagSize);
+  Subu(reg1, reg1, Operand(1));
+
+  // Generate an unrolled loop that performs a few probes before giving up.
+  static const int kProbes = 4;
+  for (int i = 0; i < kProbes; i++) {
+    // Use reg2 for index calculations and keep the hash intact in reg0.
+    mov(reg2, reg0);
+    // Compute the masked index: (hash + i + i * i) & mask.
+    if (i > 0) {
+      Addu(reg2, reg2, Operand(NumberDictionary::GetProbeOffset(i)));
+    }
+    and_(reg2, reg2, reg1);
+
+    // Scale the index by multiplying by the element size.
+    ASSERT(NumberDictionary::kEntrySize == 3);
+    sll(at, reg2, 1);  // 2x.
+    addu(reg2, reg2, at);  // reg2 = reg2 * 3.
+
+    // Check if the key is identical to the name.
+    sll(at, reg2, kPointerSizeLog2);
+    addu(reg2, elements, at);
+
+    lw(at, FieldMemOperand(reg2, NumberDictionary::kElementsStartOffset));
+    if (i != kProbes - 1) {
+      Branch(&done, eq, key, Operand(at));
+    } else {
+      Branch(miss, ne, key, Operand(at));
+    }
+  }
+
+  bind(&done);
+  // Check that the value is a normal property.
+  // reg2: elements + (index * kPointerSize).
+  const int kDetailsOffset =
+      NumberDictionary::kElementsStartOffset + 2 * kPointerSize;
+  lw(reg1, FieldMemOperand(reg2, kDetailsOffset));
+  And(at, reg1, Operand(Smi::FromInt(PropertyDetails::TypeField::mask())));
+  Branch(miss, ne, at, Operand(zero_reg));
+
+  // Get the value at the masked, scaled index and return.
+  const int kValueOffset =
+      NumberDictionary::kElementsStartOffset + kPointerSize;
+  lw(result, FieldMemOperand(reg2, kValueOffset));
+}
+
+
 // ---------------------------------------------------------------------------
 // Instruction macros.
 
@@ -1901,6 +1928,176 @@ void MacroAssembler::BranchAndLinkShort(Label* L, Condition cond, Register rs,
 }
 
 
+void MacroAssembler::Jump(Register target,
+                          Condition cond,
+                          Register rs,
+                          const Operand& rt,
+                          BranchDelaySlot bd) {
+  BlockTrampolinePoolScope block_trampoline_pool(this);
+  if (cond == cc_always) {
+    jr(target);
+  } else {
+    BRANCH_ARGS_CHECK(cond, rs, rt);
+    Branch(2, NegateCondition(cond), rs, rt);
+    jr(target);
+  }
+  // Emit a nop in the branch delay slot if required.
+  if (bd == PROTECT)
+    nop();
+}
+
+
+void MacroAssembler::Jump(intptr_t target,
+                          RelocInfo::Mode rmode,
+                          Condition cond,
+                          Register rs,
+                          const Operand& rt,
+                          BranchDelaySlot bd) {
+  li(t9, Operand(target, rmode));
+  Jump(t9, cond, rs, rt, bd);
+}
+
+
+void MacroAssembler::Jump(Address target,
+                          RelocInfo::Mode rmode,
+                          Condition cond,
+                          Register rs,
+                          const Operand& rt,
+                          BranchDelaySlot bd) {
+  ASSERT(!RelocInfo::IsCodeTarget(rmode));
+  Jump(reinterpret_cast<intptr_t>(target), rmode, cond, rs, rt, bd);
+}
+
+
+void MacroAssembler::Jump(Handle<Code> code,
+                          RelocInfo::Mode rmode,
+                          Condition cond,
+                          Register rs,
+                          const Operand& rt,
+                          BranchDelaySlot bd) {
+  ASSERT(RelocInfo::IsCodeTarget(rmode));
+  Jump(reinterpret_cast<intptr_t>(code.location()), rmode, cond, rs, rt, bd);
+}
+
+
+int MacroAssembler::CallSize(Register target,
+                             Condition cond,
+                             Register rs,
+                             const Operand& rt,
+                             BranchDelaySlot bd) {
+  int size = 0;
+
+  if (cond == cc_always) {
+    size += 1;
+  } else {
+    size += 3;
+  }
+
+  if (bd == PROTECT)
+    size += 1;
+
+  return size * kInstrSize;
+}
+
+
+// Note: To call gcc-compiled C code on mips, you must call thru t9.
+void MacroAssembler::Call(Register target,
+                          Condition cond,
+                          Register rs,
+                          const Operand& rt,
+                          BranchDelaySlot bd) {
+  BlockTrampolinePoolScope block_trampoline_pool(this);
+  Label start;
+  bind(&start);
+  if (cond == cc_always) {
+    jalr(target);
+  } else {
+    BRANCH_ARGS_CHECK(cond, rs, rt);
+    Branch(2, NegateCondition(cond), rs, rt);
+    jalr(target);
+  }
+  // Emit a nop in the branch delay slot if required.
+  if (bd == PROTECT)
+    nop();
+
+  ASSERT_EQ(CallSize(target, cond, rs, rt, bd),
+            SizeOfCodeGeneratedSince(&start));
+}
+
+
+int MacroAssembler::CallSize(Address target,
+                             RelocInfo::Mode rmode,
+                             Condition cond,
+                             Register rs,
+                             const Operand& rt,
+                             BranchDelaySlot bd) {
+  int size = CallSize(t9, cond, rs, rt, bd);
+  return size + 2 * kInstrSize;
+}
+
+
+void MacroAssembler::Call(Address target,
+                          RelocInfo::Mode rmode,
+                          Condition cond,
+                          Register rs,
+                          const Operand& rt,
+                          BranchDelaySlot bd) {
+  BlockTrampolinePoolScope block_trampoline_pool(this);
+  Label start;
+  bind(&start);
+  int32_t target_int = reinterpret_cast<int32_t>(target);
+  // Must record previous source positions before the
+  // li() generates a new code target.
+  positions_recorder()->WriteRecordedPositions();
+  li(t9, Operand(target_int, rmode), true);
+  Call(t9, cond, rs, rt, bd);
+  ASSERT_EQ(CallSize(target, rmode, cond, rs, rt, bd),
+            SizeOfCodeGeneratedSince(&start));
+}
+
+
+int MacroAssembler::CallSize(Handle<Code> code,
+                             RelocInfo::Mode rmode,
+                             unsigned ast_id,
+                             Condition cond,
+                             Register rs,
+                             const Operand& rt,
+                             BranchDelaySlot bd) {
+  return CallSize(reinterpret_cast<Address>(code.location()),
+      rmode, cond, rs, rt, bd);
+}
+
+
+void MacroAssembler::Call(Handle<Code> code,
+                          RelocInfo::Mode rmode,
+                          unsigned ast_id,
+                          Condition cond,
+                          Register rs,
+                          const Operand& rt,
+                          BranchDelaySlot bd) {
+  BlockTrampolinePoolScope block_trampoline_pool(this);
+  Label start;
+  bind(&start);
+  ASSERT(RelocInfo::IsCodeTarget(rmode));
+  if (rmode == RelocInfo::CODE_TARGET && ast_id != kNoASTId) {
+    ASSERT(ast_id_for_reloc_info_ == kNoASTId);
+    ast_id_for_reloc_info_ = ast_id;
+    rmode = RelocInfo::CODE_TARGET_WITH_ID;
+  }
+  Call(reinterpret_cast<Address>(code.location()), rmode, cond, rs, rt, bd);
+  ASSERT_EQ(CallSize(code, rmode, ast_id, cond, rs, rt),
+            SizeOfCodeGeneratedSince(&start));
+}
+
+
+void MacroAssembler::Ret(Condition cond,
+                         Register rs,
+                         const Operand& rt,
+                         BranchDelaySlot bd) {
+  Jump(ra, cond, rs, rt, bd);
+}
+
+
 void MacroAssembler::J(Label* L, BranchDelaySlot bdslot) {
   BlockTrampolinePoolScope block_trampoline_pool(this);
 
@@ -1959,142 +2156,24 @@ void MacroAssembler::Jalr(Label* L, BranchDelaySlot bdslot) {
 }
 
 
-void MacroAssembler::Jump(const Operand& target, BranchDelaySlot bdslot) {
-  BlockTrampolinePoolScope block_trampoline_pool(this);
-  if (target.is_reg()) {
-      jr(target.rm());
-  } else {
-    if (!MustUseReg(target.rmode_)) {
-        j(target.imm32_);
-    } else {
-      li(t9, target);
-      jr(t9);
-    }
-  }
-  // Emit a nop in the branch delay slot if required.
-  if (bdslot == PROTECT)
-    nop();
-}
-
-
-void MacroAssembler::Jump(const Operand& target,
-                          Condition cond, Register rs, const Operand& rt,
-                          BranchDelaySlot bdslot) {
-  BlockTrampolinePoolScope block_trampoline_pool(this);
-  BRANCH_ARGS_CHECK(cond, rs, rt);
-  if (target.is_reg()) {
-    if (cond == cc_always) {
-      jr(target.rm());
-    } else {
-      Branch(2, NegateCondition(cond), rs, rt);
-      jr(target.rm());
-    }
-  } else {  // Not register target.
-    if (!MustUseReg(target.rmode_)) {
-      if (cond == cc_always) {
-        j(target.imm32_);
-      } else {
-        Branch(2, NegateCondition(cond), rs, rt);
-        j(target.imm32_);  // Will generate only one instruction.
-      }
-    } else {  // MustUseReg(target).
-      li(t9, target);
-      if (cond == cc_always) {
-        jr(t9);
-      } else {
-        Branch(2, NegateCondition(cond), rs, rt);
-        jr(t9);  // Will generate only one instruction.
-      }
-    }
-  }
-  // Emit a nop in the branch delay slot if required.
-  if (bdslot == PROTECT)
-    nop();
-}
-
-
-int MacroAssembler::CallSize(Handle<Code> code, RelocInfo::Mode rmode) {
-  return 4 * kInstrSize;
-}
-
-
-int MacroAssembler::CallSize(Register reg) {
-  return 2 * kInstrSize;
-}
-
-
-// Note: To call gcc-compiled C code on mips, you must call thru t9.
-void MacroAssembler::Call(const Operand& target, BranchDelaySlot bdslot) {
-  BlockTrampolinePoolScope block_trampoline_pool(this);
-  if (target.is_reg()) {
-      jalr(target.rm());
-  } else {  // !target.is_reg().
-    if (!MustUseReg(target.rmode_)) {
-      jal(target.imm32_);
-    } else {  // MustUseReg(target).
-      // Must record previous source positions before the
-      // li() generates a new code target.
-      positions_recorder()->WriteRecordedPositions();
-      li(t9, target);
-      jalr(t9);
-    }
-  }
-  // Emit a nop in the branch delay slot if required.
-  if (bdslot == PROTECT)
-    nop();
-}
-
-
-// Note: To call gcc-compiled C code on mips, you must call thru t9.
-void MacroAssembler::Call(const Operand& target,
-                          Condition cond, Register rs, const Operand& rt,
-                          BranchDelaySlot bdslot) {
-  BlockTrampolinePoolScope block_trampoline_pool(this);
-  BRANCH_ARGS_CHECK(cond, rs, rt);
-  if (target.is_reg()) {
-    if (cond == cc_always) {
-      jalr(target.rm());
-    } else {
-      Branch(2, NegateCondition(cond), rs, rt);
-      jalr(target.rm());
-    }
-  } else {  // !target.is_reg().
-    if (!MustUseReg(target.rmode_)) {
-      if (cond == cc_always) {
-        jal(target.imm32_);
-      } else {
-        Branch(2, NegateCondition(cond), rs, rt);
-        jal(target.imm32_);  // Will generate only one instruction.
-      }
-    } else {  // MustUseReg(target)
-      li(t9, target);
-      if (cond == cc_always) {
-        jalr(t9);
-      } else {
-        Branch(2, NegateCondition(cond), rs, rt);
-        jalr(t9);  // Will generate only one instruction.
-      }
-    }
+void MacroAssembler::DropAndRet(int drop,
+                                Condition cond,
+                                Register r1,
+                                const Operand& r2) {
+  // This is a workaround to make sure only one branch instruction is
+  // generated. It relies on Drop and Ret not creating branches if
+  // cond == cc_always.
+  Label skip;
+  if (cond != cc_always) {
+    Branch(&skip, NegateCondition(cond), r1, r2);
   }
-  // Emit a nop in the branch delay slot if required.
-  if (bdslot == PROTECT)
-    nop();
-}
 
+  Drop(drop);
+  Ret();
 
-void MacroAssembler::CallWithAstId(Handle<Code> code,
-                                   RelocInfo::Mode rmode,
-                                   unsigned ast_id,
-                                   Condition cond,
-                                   Register r1,
-                                   const Operand& r2) {
-  ASSERT(RelocInfo::IsCodeTarget(rmode));
-  if (rmode == RelocInfo::CODE_TARGET && ast_id != kNoASTId) {
-    ASSERT(ast_id_for_reloc_info_ == kNoASTId);
-    ast_id_for_reloc_info_ = ast_id;
-    rmode = RelocInfo::CODE_TARGET_WITH_ID;
+  if (cond != cc_always) {
+    bind(&skip);
   }
-  Call(reinterpret_cast<intptr_t>(code.location()), rmode, cond, r1, r2);
 }
 
 
@@ -2109,12 +2188,10 @@ void MacroAssembler::Drop(int count,
   Label skip;
 
   if (cond != al) {
-    Branch(&skip, NegateCondition(cond), reg, op);
+     Branch(&skip, NegateCondition(cond), reg, op);
   }
 
-  if (count > 0) {
-    addiu(sp, sp, count * kPointerSize);
-  }
+  addiu(sp, sp, count * kPointerSize);
 
   if (cond != al) {
     bind(&skip);
@@ -2122,26 +2199,6 @@ void MacroAssembler::Drop(int count,
 }
 
 
-void MacroAssembler::DropAndRet(int drop,
-                                Condition cond,
-                                Register r1,
-                                const Operand& r2) {
-  // This is a workaround to make sure only one branch instruction is
-  // generated. It relies on Drop and Ret not creating branches if
-  // cond == cc_always.
-  Label skip;
-  if (cond != cc_always) {
-    Branch(&skip, NegateCondition(cond), r1, r2);
-  }
-
-  Drop(drop);
-  Ret();
-
-  if (cond != cc_always) {
-    bind(&skip);
-  }
-}
-
 
 void MacroAssembler::Swap(Register reg1,
                           Register reg2,
@@ -2804,7 +2861,7 @@ void MacroAssembler::CheckFastElements(Register map,
                                        Register scratch,
                                        Label* fail) {
   STATIC_ASSERT(JSObject::FAST_ELEMENTS == 0);
-  lbu(scratch, FieldMemOperand(map, Map::kInstanceTypeOffset));
+  lbu(scratch, FieldMemOperand(map, Map::kBitField2Offset));
   Branch(fail, hi, scratch, Operand(Map::kMaximumBitField2FastElementValue));
 }
 
@@ -2979,9 +3036,9 @@ void MacroAssembler::InvokePrologue(const ParameterCount& expected,
     Handle<Code> adaptor =
         isolate()->builtins()->ArgumentsAdaptorTrampoline();
     if (flag == CALL_FUNCTION) {
-      call_wrapper.BeforeCall(CallSize(adaptor, RelocInfo::CODE_TARGET));
+      call_wrapper.BeforeCall(CallSize(adaptor));
       SetCallKind(t1, call_kind);
-      Call(adaptor, RelocInfo::CODE_TARGET);
+      Call(adaptor);
       call_wrapper.AfterCall();
       jmp(done);
     } else {
@@ -3178,7 +3235,7 @@ void MacroAssembler::GetObjectType(Register object,
 void MacroAssembler::CallStub(CodeStub* stub, Condition cond,
                               Register r1, const Operand& r2) {
   ASSERT(allow_stub_calls());  // Stub calls are not allowed in some stubs.
-  Call(stub->GetCode(), RelocInfo::CODE_TARGET, cond, r1, r2);
+  Call(stub->GetCode(), RelocInfo::CODE_TARGET, kNoASTId, cond, r1, r2);
 }
 
 
@@ -3189,7 +3246,8 @@ MaybeObject* MacroAssembler::TryCallStub(CodeStub* stub, Condition cond,
   { MaybeObject* maybe_result = stub->TryGetCode();
     if (!maybe_result->ToObject(&result)) return maybe_result;
   }
-  Call(Handle<Code>(Code::cast(result)), RelocInfo::CODE_TARGET, cond, r1, r2);
+  Call(Handle<Code>(Code::cast(result)), RelocInfo::CODE_TARGET,
+      kNoASTId, cond, r1, r2);
   return result;
 }
 
diff --git a/deps/v8/src/mips/macro-assembler-mips.h b/deps/v8/src/mips/macro-assembler-mips.h
index 985ef0c830..4994516ea7 100644
--- a/deps/v8/src/mips/macro-assembler-mips.h
+++ b/deps/v8/src/mips/macro-assembler-mips.h
@@ -99,44 +99,11 @@ class MacroAssembler: public Assembler {
   // macro assembler.
   MacroAssembler(Isolate* isolate, void* buffer, int size);
 
-// Arguments macros.
+  // Arguments macros.
 #define COND_TYPED_ARGS Condition cond, Register r1, const Operand& r2
 #define COND_ARGS cond, r1, r2
 
-// Prototypes.
-
-// Prototypes for functions with no target (eg Ret()).
-#define DECLARE_NOTARGET_PROTOTYPE(Name) \
-  void Name(BranchDelaySlot bd = PROTECT); \
-  void Name(COND_TYPED_ARGS, BranchDelaySlot bd = PROTECT); \
-  inline void Name(BranchDelaySlot bd, COND_TYPED_ARGS) { \
-    Name(COND_ARGS, bd); \
-  }
-
-// Prototypes for functions with a target.
-
-// Cases when relocation may be needed.
-#define DECLARE_RELOC_PROTOTYPE(Name, target_type) \
-  void Name(target_type target, \
-            RelocInfo::Mode rmode, \
-            BranchDelaySlot bd = PROTECT); \
-  inline void Name(BranchDelaySlot bd, \
-                   target_type target, \
-                   RelocInfo::Mode rmode) { \
-    Name(target, rmode, bd); \
-  } \
-  void Name(target_type target, \
-            RelocInfo::Mode rmode, \
-            COND_TYPED_ARGS, \
-            BranchDelaySlot bd = PROTECT); \
-  inline void Name(BranchDelaySlot bd, \
-                   target_type target, \
-                   RelocInfo::Mode rmode, \
-                   COND_TYPED_ARGS) { \
-    Name(target, rmode, COND_ARGS, bd); \
-  }
-
-// Cases when relocation is not needed.
+  // Cases when relocation is not needed.
 #define DECLARE_NORELOC_PROTOTYPE(Name, target_type) \
   void Name(target_type target, BranchDelaySlot bd = PROTECT); \
   inline void Name(BranchDelaySlot bd, target_type target) { \
@@ -151,44 +118,44 @@ class MacroAssembler: public Assembler {
     Name(target, COND_ARGS, bd); \
   }
 
-// Target prototypes.
-
-#define DECLARE_JUMP_CALL_PROTOTYPES(Name) \
-  DECLARE_NORELOC_PROTOTYPE(Name, Register) \
-  DECLARE_NORELOC_PROTOTYPE(Name, const Operand&) \
-  DECLARE_RELOC_PROTOTYPE(Name, byte*) \
-  DECLARE_RELOC_PROTOTYPE(Name, Handle<Code>)
-
 #define DECLARE_BRANCH_PROTOTYPES(Name) \
   DECLARE_NORELOC_PROTOTYPE(Name, Label*) \
   DECLARE_NORELOC_PROTOTYPE(Name, int16_t)
 
+  DECLARE_BRANCH_PROTOTYPES(Branch)
+  DECLARE_BRANCH_PROTOTYPES(BranchAndLink)
 
-DECLARE_JUMP_CALL_PROTOTYPES(Jump)
-DECLARE_JUMP_CALL_PROTOTYPES(Call)
-
-DECLARE_BRANCH_PROTOTYPES(Branch)
-DECLARE_BRANCH_PROTOTYPES(BranchAndLink)
-
-DECLARE_NOTARGET_PROTOTYPE(Ret)
-
+#undef DECLARE_BRANCH_PROTOTYPES
 #undef COND_TYPED_ARGS
 #undef COND_ARGS
-#undef DECLARE_NOTARGET_PROTOTYPE
-#undef DECLARE_NORELOC_PROTOTYPE
-#undef DECLARE_RELOC_PROTOTYPE
-#undef DECLARE_JUMP_CALL_PROTOTYPES
-#undef DECLARE_BRANCH_PROTOTYPES
 
-  void CallWithAstId(Handle<Code> code,
-                     RelocInfo::Mode rmode = RelocInfo::CODE_TARGET,
-                     unsigned ast_id = kNoASTId,
-                     Condition cond = al,
-                     Register r1 = zero_reg,
-                     const Operand& r2 = Operand(zero_reg));
 
-  int CallSize(Register reg);
-  int CallSize(Handle<Code> code, RelocInfo::Mode rmode);
+  // Jump, Call, and Ret pseudo instructions implementing inter-working.
+#define COND_ARGS Condition cond = al, Register rs = zero_reg, \
+  const Operand& rt = Operand(zero_reg), BranchDelaySlot bd = PROTECT
+
+  void Jump(Register target, COND_ARGS);
+  void Jump(intptr_t target, RelocInfo::Mode rmode, COND_ARGS);
+  void Jump(Address target, RelocInfo::Mode rmode, COND_ARGS);
+  void Jump(Handle<Code> code, RelocInfo::Mode rmode, COND_ARGS);
+  int CallSize(Register target, COND_ARGS);
+  void Call(Register target, COND_ARGS);
+  int CallSize(Address target, RelocInfo::Mode rmode, COND_ARGS);
+  void Call(Address target, RelocInfo::Mode rmode, COND_ARGS);
+  int CallSize(Handle<Code> code,
+               RelocInfo::Mode rmode = RelocInfo::CODE_TARGET,
+               unsigned ast_id = kNoASTId,
+               COND_ARGS);
+  void Call(Handle<Code> code,
+            RelocInfo::Mode rmode = RelocInfo::CODE_TARGET,
+            unsigned ast_id = kNoASTId,
+            COND_ARGS);
+  void Ret(COND_ARGS);
+  inline void Ret(BranchDelaySlot bd) {
+    Ret(al, zero_reg, Operand(zero_reg), bd);
+  }
+
+#undef COND_ARGS
 
   // Emit code to discard a non-negative number of pointer-sized elements
   // from the stack, clobbering only the sp register.
@@ -299,6 +266,16 @@ DECLARE_NOTARGET_PROTOTYPE(Ret)
                               Register scratch,
                               Label* miss);
 
+
+  void LoadFromNumberDictionary(Label* miss,
+                                Register elements,
+                                Register key,
+                                Register result,
+                                Register reg0,
+                                Register reg1,
+                                Register reg2);
+
+
   inline void MarkCode(NopMarkerTypes type) {
     nop(type);
   }
@@ -1125,17 +1102,6 @@ DECLARE_NOTARGET_PROTOTYPE(Ret)
   void Jr(Label* L, BranchDelaySlot bdslot);
   void Jalr(Label* L, BranchDelaySlot bdslot);
 
-  void Jump(intptr_t target, RelocInfo::Mode rmode,
-            BranchDelaySlot bd = PROTECT);
-  void Jump(intptr_t target, RelocInfo::Mode rmode, Condition cond = cc_always,
-            Register r1 = zero_reg, const Operand& r2 = Operand(zero_reg),
-            BranchDelaySlot bd = PROTECT);
-  void Call(intptr_t target, RelocInfo::Mode rmode,
-            BranchDelaySlot bd = PROTECT);
-  void Call(intptr_t target, RelocInfo::Mode rmode, Condition cond = cc_always,
-            Register r1 = zero_reg, const Operand& r2 = Operand(zero_reg),
-            BranchDelaySlot bd = PROTECT);
-
   // Helper functions for generating invokes.
   void InvokePrologue(const ParameterCount& expected,
                       const ParameterCount& actual,
diff --git a/deps/v8/src/mips/regexp-macro-assembler-mips.cc b/deps/v8/src/mips/regexp-macro-assembler-mips.cc
index cfc8f651c7..9935ef9b5b 100644
--- a/deps/v8/src/mips/regexp-macro-assembler-mips.cc
+++ b/deps/v8/src/mips/regexp-macro-assembler-mips.cc
@@ -179,7 +179,7 @@ void RegExpMacroAssemblerMIPS::Backtrack() {
   // Pop Code* offset from backtrack stack, add Code* and jump to location.
   Pop(a0);
   __ Addu(a0, a0, code_pointer());
-  __ Jump(Operand(a0));
+  __ Jump(a0);
 }
 
 
@@ -1238,7 +1238,7 @@ void RegExpCEntryStub::Generate(MacroAssembler* masm_) {
   __ Call(t9);
   __ lw(ra, MemOperand(sp, 0));
   __ Addu(sp, sp, Operand(stack_alignment));
-  __ Jump(Operand(ra));
+  __ Jump(ra);
 }
 
 
diff --git a/deps/v8/src/mips/regexp-macro-assembler-mips.h b/deps/v8/src/mips/regexp-macro-assembler-mips.h
index ad7ada5473..7fe0c8865e 100644
--- a/deps/v8/src/mips/regexp-macro-assembler-mips.h
+++ b/deps/v8/src/mips/regexp-macro-assembler-mips.h
@@ -29,6 +29,12 @@
 #ifndef V8_MIPS_REGEXP_MACRO_ASSEMBLER_MIPS_H_
 #define V8_MIPS_REGEXP_MACRO_ASSEMBLER_MIPS_H_
 
+#include "mips/assembler-mips.h"
+#include "mips/assembler-mips-inl.h"
+#include "macro-assembler.h"
+#include "code.h"
+#include "mips/macro-assembler-mips.h"
+
 namespace v8 {
 namespace internal {
 
@@ -249,4 +255,3 @@ class RegExpMacroAssemblerMIPS: public NativeRegExpMacroAssembler {
 }}  // namespace v8::internal
 
 #endif  // V8_MIPS_REGEXP_MACRO_ASSEMBLER_MIPS_H_
-
diff --git a/deps/v8/src/mips/stub-cache-mips.cc b/deps/v8/src/mips/stub-cache-mips.cc
index 3e5a0091ca..919bdc40c2 100644
--- a/deps/v8/src/mips/stub-cache-mips.cc
+++ b/deps/v8/src/mips/stub-cache-mips.cc
@@ -3099,7 +3099,8 @@ MaybeObject* KeyedLoadStubCompiler::CompileLoadElement(Map* receiver_map) {
   //  -- a1    : receiver
   // -----------------------------------
   Code* stub;
-  MaybeObject* maybe_stub = ComputeSharedKeyedLoadElementStub(receiver_map);
+  JSObject::ElementsKind elements_kind = receiver_map->elements_kind();
+  MaybeObject* maybe_stub = KeyedLoadElementStub(elements_kind).TryGetCode();
   if (!maybe_stub->To(&stub)) return maybe_stub;
   __ DispatchMap(a1,
                  a2,
@@ -3190,7 +3191,10 @@ MaybeObject* KeyedStoreStubCompiler::CompileStoreElement(Map* receiver_map) {
   //  -- a3    : scratch
   // -----------------------------------
   Code* stub;
-  MaybeObject* maybe_stub = ComputeSharedKeyedStoreElementStub(receiver_map);
+  JSObject::ElementsKind elements_kind = receiver_map->elements_kind();
+  bool is_js_array = receiver_map->instance_type() == JS_ARRAY_TYPE;
+  MaybeObject* maybe_stub =
+      KeyedStoreElementStub(is_js_array, elements_kind).TryGetCode();
   if (!maybe_stub->To(&stub)) return maybe_stub;
   __ DispatchMap(a2,
                  a3,
@@ -3390,6 +3394,54 @@ MaybeObject* ConstructStubCompiler::CompileConstructStub(JSFunction* function) {
 #define __ ACCESS_MASM(masm)
 
 
+void KeyedLoadStubCompiler::GenerateLoadDictionaryElement(
+    MacroAssembler* masm) {
+  // ---------- S t a t e --------------
+  //  -- ra     : return address
+  //  -- a0     : key
+  //  -- a1     : receiver
+  // -----------------------------------
+  Label slow, miss_force_generic;
+
+  Register key = a0;
+  Register receiver = a1;
+
+  __ JumpIfNotSmi(key, &miss_force_generic);
+  __ lw(t0, FieldMemOperand(receiver, JSObject::kElementsOffset));
+  __ sra(a2, a0, kSmiTagSize);
+  __ LoadFromNumberDictionary(&slow, t0, a0, v0, a2, a3, t1);
+  __ Ret();
+
+  // Slow case, key and receiver still in a0 and a1.
+  __ bind(&slow);
+  __ IncrementCounter(
+      masm->isolate()->counters()->keyed_load_external_array_slow(),
+      1, a2, a3);
+  // Entry registers are intact.
+  // ---------- S t a t e --------------
+  //  -- ra     : return address
+  //  -- a0     : key
+  //  -- a1     : receiver
+  // -----------------------------------
+  Handle<Code> slow_ic =
+      masm->isolate()->builtins()->KeyedLoadIC_Slow();
+  __ Jump(slow_ic, RelocInfo::CODE_TARGET);
+
+  // Miss case, call the runtime.
+  __ bind(&miss_force_generic);
+
+  // ---------- S t a t e --------------
+  //  -- ra     : return address
+  //  -- a0     : key
+  //  -- a1     : receiver
+  // -----------------------------------
+
+  Handle<Code> miss_ic =
+     masm->isolate()->builtins()->KeyedLoadIC_MissForceGeneric();
+  __ Jump(miss_ic, RelocInfo::CODE_TARGET);
+}
+
+
 static bool IsElementTypeSigned(JSObject::ElementsKind elements_kind) {
   switch (elements_kind) {
     case JSObject::EXTERNAL_BYTE_ELEMENTS:
@@ -4201,7 +4253,7 @@ void KeyedStoreStubCompiler::GenerateStoreFastElement(MacroAssembler* masm,
   // have been verified by the caller to not be a smi.
 
   // Check that the key is a smi.
-  __ JumpIfNotSmi(a0, &miss_force_generic);
+  __ JumpIfNotSmi(key_reg, &miss_force_generic);
 
   // Get the elements array and make sure it is a fast element array, not 'cow'.
   __ lw(elements_reg,
diff --git a/deps/v8/src/mksnapshot.cc b/deps/v8/src/mksnapshot.cc
index 1ed610341e..c5ce12f0ec 100644
--- a/deps/v8/src/mksnapshot.cc
+++ b/deps/v8/src/mksnapshot.cc
@@ -296,10 +296,9 @@ class BZip2Decompressor : public StartupDataDecompressor {
 
 
 int main(int argc, char** argv) {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   // By default, log code create information in the snapshot.
   i::FLAG_log_code = true;
-#endif
+
   // Print the usage if an error occurs when parsing the command line
   // flags or if the help flag is set.
   int result = i::FlagList::SetFlagsFromCommandLine(&argc, argv, true);
diff --git a/deps/v8/src/objects-visiting.h b/deps/v8/src/objects-visiting.h
index a2b1c4fc24..cc64763b5f 100644
--- a/deps/v8/src/objects-visiting.h
+++ b/deps/v8/src/objects-visiting.h
@@ -30,6 +30,22 @@
 
 #include "allocation.h"
 
+#if V8_TARGET_ARCH_IA32
+#include "ia32/assembler-ia32.h"
+#include "ia32/assembler-ia32-inl.h"
+#elif V8_TARGET_ARCH_X64
+#include "x64/assembler-x64.h"
+#include "x64/assembler-x64-inl.h"
+#elif V8_TARGET_ARCH_ARM
+#include "arm/assembler-arm.h"
+#include "arm/assembler-arm-inl.h"
+#elif V8_TARGET_ARCH_MIPS
+#include "mips/assembler-mips.h"
+#include "mips/assembler-mips-inl.h"
+#else
+#error Unsupported target architecture.
+#endif
+
 // This file provides base classes and auxiliary methods for defining
 // static object visitors used during GC.
 // Visiting HeapObject body with a normal ObjectVisitor requires performing
diff --git a/deps/v8/src/objects.cc b/deps/v8/src/objects.cc
index 6242198ec3..ca780dbe0e 100644
--- a/deps/v8/src/objects.cc
+++ b/deps/v8/src/objects.cc
@@ -1883,13 +1883,9 @@ void JSObject::LookupCallbackSetterInPrototypes(String* name,
        pt = pt->GetPrototype()) {
     JSObject::cast(pt)->LocalLookupRealNamedProperty(name, result);
     if (result->IsProperty()) {
-      if (result->IsReadOnly()) {
-        result->NotFound();
-        return;
-      }
-      if (result->type() == CALLBACKS) {
-        return;
-      }
+      if (result->type() == CALLBACKS && !result->IsReadOnly()) return;
+      // Found non-callback or read-only callback, stop looking.
+      break;
     }
   }
   result->NotFound();
@@ -2273,10 +2269,10 @@ MUST_USE_RESULT PropertyAttributes JSProxy::GetPropertyAttributeWithHandler(
 
 
 MaybeObject* JSObject::SetPropertyForResult(LookupResult* result,
-                                   String* name,
-                                   Object* value,
-                                   PropertyAttributes attributes,
-                                   StrictModeFlag strict_mode) {
+                                            String* name,
+                                            Object* value,
+                                            PropertyAttributes attributes,
+                                            StrictModeFlag strict_mode) {
   Heap* heap = GetHeap();
   // Make sure that the top context does not change when doing callbacks or
   // interceptor calls.
@@ -3068,7 +3064,9 @@ MaybeObject* JSObject::DeleteDictionaryElement(uint32_t index,
   Isolate* isolate = GetIsolate();
   Heap* heap = isolate->heap();
   FixedArray* backing_store = FixedArray::cast(elements());
-  if (backing_store->map() == heap->non_strict_arguments_elements_map()) {
+  bool is_arguments =
+      (GetElementsKind() == JSObject::NON_STRICT_ARGUMENTS_ELEMENTS);
+  if (is_arguments) {
     backing_store = FixedArray::cast(backing_store->get(1));
   }
   NumberDictionary* dictionary = NumberDictionary::cast(backing_store);
@@ -3081,7 +3079,11 @@ MaybeObject* JSObject::DeleteDictionaryElement(uint32_t index,
       if (!maybe_elements->To(&new_elements)) {
         return maybe_elements;
       }
-      set_elements(new_elements);
+      if (is_arguments) {
+        FixedArray::cast(elements())->set(1, new_elements);
+      } else {
+        set_elements(new_elements);
+      }
     }
     if (mode == STRICT_DELETION && result == heap->false_value()) {
       // In strict mode, attempting to delete a non-configurable property
@@ -3375,23 +3377,22 @@ MaybeObject* JSObject::PreventExtensions() {
   }
 
   // If there are fast elements we normalize.
-  if (HasFastElements()) {
-    MaybeObject* result = NormalizeElements();
-    if (result->IsFailure()) return result;
+  NumberDictionary* dictionary = NULL;
+  { MaybeObject* maybe = NormalizeElements();
+    if (!maybe->To<NumberDictionary>(&dictionary)) return maybe;
   }
-  // TODO(kmillikin): Handle arguments object with dictionary elements.
-  ASSERT(HasDictionaryElements());
+  ASSERT(HasDictionaryElements() || HasDictionaryArgumentsElements());
   // Make sure that we never go back to fast case.
-  element_dictionary()->set_requires_slow_elements();
+  dictionary->set_requires_slow_elements();
 
   // Do a map transition, other objects with this map may still
   // be extensible.
-  Object* new_map;
-  { MaybeObject* maybe_new_map = map()->CopyDropTransitions();
-    if (!maybe_new_map->ToObject(&new_map)) return maybe_new_map;
+  Map* new_map;
+  { MaybeObject* maybe = map()->CopyDropTransitions();
+    if (!maybe->To<Map>(&new_map)) return maybe;
   }
-  Map::cast(new_map)->set_is_extensible(false);
-  set_map(Map::cast(new_map));
+  new_map->set_is_extensible(false);
+  set_map(new_map);
   ASSERT(!map()->is_extensible());
   return new_map;
 }
@@ -4117,6 +4118,8 @@ void Map::TraverseTransitionTree(TraverseCallback callback, void* data) {
         }
       }
       if (!map_done) continue;
+    } else {
+      map_or_index_field = NULL;
     }
     // That was the regular transitions, now for the prototype transitions.
     FixedArray* prototype_transitions =
@@ -9428,7 +9431,7 @@ void JSObject::GetLocalPropertyNames(FixedArray* storage, int index) {
     }
     ASSERT(storage->length() >= index);
   } else {
-    property_dictionary()->CopyKeysTo(storage);
+    property_dictionary()->CopyKeysTo(storage, StringDictionary::UNSORTED);
   }
 }
 
@@ -9505,33 +9508,49 @@ int JSObject::GetLocalElementKeys(FixedArray* storage,
       break;
     case DICTIONARY_ELEMENTS: {
       if (storage != NULL) {
-        element_dictionary()->CopyKeysTo(storage, filter);
+        element_dictionary()->CopyKeysTo(storage,
+                                         filter,
+                                         NumberDictionary::SORTED);
       }
       counter += element_dictionary()->NumberOfElementsFilterAttributes(filter);
       break;
     }
     case NON_STRICT_ARGUMENTS_ELEMENTS: {
       FixedArray* parameter_map = FixedArray::cast(elements());
-      int length = parameter_map->length();
-      for (int i = 2; i < length; ++i) {
-        if (!parameter_map->get(i)->IsTheHole()) {
-          if (storage != NULL) storage->set(i - 2, Smi::FromInt(i - 2));
-          ++counter;
-        }
-      }
+      int mapped_length = parameter_map->length() - 2;
       FixedArray* arguments = FixedArray::cast(parameter_map->get(1));
       if (arguments->IsDictionary()) {
+        // Copy the keys from arguments first, because Dictionary::CopyKeysTo
+        // will insert in storage starting at index 0.
         NumberDictionary* dictionary = NumberDictionary::cast(arguments);
-        if (storage != NULL) dictionary->CopyKeysTo(storage, filter);
+        if (storage != NULL) {
+          dictionary->CopyKeysTo(storage, filter, NumberDictionary::UNSORTED);
+        }
         counter += dictionary->NumberOfElementsFilterAttributes(filter);
+        for (int i = 0; i < mapped_length; ++i) {
+          if (!parameter_map->get(i + 2)->IsTheHole()) {
+            if (storage != NULL) storage->set(counter, Smi::FromInt(i));
+            ++counter;
+          }
+        }
+        if (storage != NULL) storage->SortPairs(storage, counter);
+
       } else {
-        int length = arguments->length();
-        for (int i = 0; i < length; ++i) {
-          if (!arguments->get(i)->IsTheHole()) {
-            if (storage != NULL) storage->set(i, Smi::FromInt(i));
+        int backing_length = arguments->length();
+        int i = 0;
+        for (; i < mapped_length; ++i) {
+          if (!parameter_map->get(i + 2)->IsTheHole()) {
+            if (storage != NULL) storage->set(counter, Smi::FromInt(i));
+            ++counter;
+          } else if (i < backing_length && !arguments->get(i)->IsTheHole()) {
+            if (storage != NULL) storage->set(counter, Smi::FromInt(i));
             ++counter;
           }
         }
+        for (; i < backing_length; ++i) {
+          if (storage != NULL) storage->set(counter, Smi::FromInt(i));
+          ++counter;
+        }
       }
       break;
     }
@@ -10132,7 +10151,9 @@ template Object* Dictionary<StringDictionaryShape, String*>::SlowReverseLookup(
     Object*);
 
 template void Dictionary<NumberDictionaryShape, uint32_t>::CopyKeysTo(
-    FixedArray*, PropertyAttributes);
+    FixedArray*,
+    PropertyAttributes,
+    Dictionary<NumberDictionaryShape, uint32_t>::SortMode);
 
 template Object* Dictionary<StringDictionaryShape, String*>::DeleteProperty(
     int, JSObject::DeleteMode);
@@ -10147,7 +10168,8 @@ template MaybeObject* Dictionary<NumberDictionaryShape, uint32_t>::Shrink(
     uint32_t);
 
 template void Dictionary<StringDictionaryShape, String*>::CopyKeysTo(
-    FixedArray*);
+    FixedArray*,
+    Dictionary<StringDictionaryShape, String*>::SortMode);
 
 template int
 Dictionary<StringDictionaryShape, String*>::NumberOfElementsFilterAttributes(
@@ -11199,8 +11221,10 @@ int Dictionary<Shape, Key>::NumberOfEnumElements() {
 
 
 template<typename Shape, typename Key>
-void Dictionary<Shape, Key>::CopyKeysTo(FixedArray* storage,
-                                        PropertyAttributes filter) {
+void Dictionary<Shape, Key>::CopyKeysTo(
+    FixedArray* storage,
+    PropertyAttributes filter,
+    typename Dictionary<Shape, Key>::SortMode sort_mode) {
   ASSERT(storage->length() >= NumberOfEnumElements());
   int capacity = HashTable<Shape, Key>::Capacity();
   int index = 0;
@@ -11213,7 +11237,9 @@ void Dictionary<Shape, Key>::CopyKeysTo(FixedArray* storage,
        if ((attr & filter) == 0) storage->set(index++, k);
      }
   }
-  storage->SortPairs(storage, index);
+  if (sort_mode == Dictionary<Shape, Key>::SORTED) {
+    storage->SortPairs(storage, index);
+  }
   ASSERT(storage->length() >= index);
 }
 
@@ -11239,7 +11265,9 @@ void StringDictionary::CopyEnumKeysTo(FixedArray* storage,
 
 
 template<typename Shape, typename Key>
-void Dictionary<Shape, Key>::CopyKeysTo(FixedArray* storage) {
+void Dictionary<Shape, Key>::CopyKeysTo(
+    FixedArray* storage,
+    typename Dictionary<Shape, Key>::SortMode sort_mode) {
   ASSERT(storage->length() >= NumberOfElementsFilterAttributes(
       static_cast<PropertyAttributes>(NONE)));
   int capacity = HashTable<Shape, Key>::Capacity();
@@ -11252,6 +11280,9 @@ void Dictionary<Shape, Key>::CopyKeysTo(FixedArray* storage) {
       storage->set(index++, k);
     }
   }
+  if (sort_mode == Dictionary<Shape, Key>::SORTED) {
+    storage->SortPairs(storage, index);
+  }
   ASSERT(storage->length() >= index);
 }
 
diff --git a/deps/v8/src/objects.h b/deps/v8/src/objects.h
index c34efdd4c7..9765fe2a0a 100644
--- a/deps/v8/src/objects.h
+++ b/deps/v8/src/objects.h
@@ -2770,10 +2770,13 @@ class Dictionary: public HashTable<Shape, Key> {
   // Returns the number of enumerable elements in the dictionary.
   int NumberOfEnumElements();
 
+  enum SortMode { UNSORTED, SORTED };
   // Copies keys to preallocated fixed array.
-  void CopyKeysTo(FixedArray* storage, PropertyAttributes filter);
+  void CopyKeysTo(FixedArray* storage,
+                  PropertyAttributes filter,
+                  SortMode sort_mode);
   // Fill in details for properties into storage.
-  void CopyKeysTo(FixedArray* storage);
+  void CopyKeysTo(FixedArray* storage, SortMode sort_mode);
 
   // Accessors for next enumeration index.
   void SetNextEnumerationIndex(int index) {
diff --git a/deps/v8/src/parser.cc b/deps/v8/src/parser.cc
index 184f0a2a27..3085ef86be 100644
--- a/deps/v8/src/parser.cc
+++ b/deps/v8/src/parser.cc
@@ -823,14 +823,24 @@ class ParserFinder {
 // form expr.a = ...; expr.b = ...; etc.
 class InitializationBlockFinder : public ParserFinder {
  public:
-  InitializationBlockFinder()
-    : first_in_block_(NULL), last_in_block_(NULL), block_size_(0) {}
+  // We find and mark the initialization blocks in top level
+  // non-looping code only. This is because the optimization prevents
+  // reuse of the map transitions, so it should be used only for code
+  // that will only be run once.
+  InitializationBlockFinder(Scope* top_scope, Target* target)
+      : enabled_(top_scope->DeclarationScope()->is_global_scope() &&
+                 !IsLoopTarget(target)),
+        first_in_block_(NULL),
+        last_in_block_(NULL),
+        block_size_(0) {}
 
   ~InitializationBlockFinder() {
+    if (!enabled_) return;
     if (InBlock()) EndBlock();
   }
 
   void Update(Statement* stat) {
+    if (!enabled_) return;
     Assignment* assignment = AsAssignment(stat);
     if (InBlock()) {
       if (BlockContinues(assignment)) {
@@ -851,6 +861,14 @@ class InitializationBlockFinder : public ParserFinder {
   // the overhead exceeds the savings below this limit.
   static const int kMinInitializationBlock = 3;
 
+  static bool IsLoopTarget(Target* target) {
+    while (target != NULL) {
+      if (target->node()->AsIterationStatement() != NULL) return true;
+      target = target->previous();
+    }
+    return false;
+  }
+
   // Returns true if the expressions appear to denote the same object.
   // In the context of initialization blocks, we only consider expressions
   // of the form 'expr.x' or expr["x"].
@@ -913,6 +931,7 @@ class InitializationBlockFinder : public ParserFinder {
 
   bool InBlock() { return first_in_block_ != NULL; }
 
+  const bool enabled_;
   Assignment* first_in_block_;
   Assignment* last_in_block_;
   int block_size_;
@@ -1078,7 +1097,7 @@ void* Parser::ParseSourceElements(ZoneList<Statement*>* processor,
   TargetScope scope(&this->target_stack_);
 
   ASSERT(processor != NULL);
-  InitializationBlockFinder block_finder;
+  InitializationBlockFinder block_finder(top_scope_, target_stack_);
   ThisNamedPropertyAssigmentFinder this_property_assignment_finder(isolate());
   bool directive_prologue = true;     // Parsing directive prologue.
 
@@ -1133,12 +1152,7 @@ void* Parser::ParseSourceElements(ZoneList<Statement*>* processor,
       }
     }
 
-    // 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);
-    }
+    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);
@@ -1478,9 +1492,13 @@ Block* Parser::ParseBlock(ZoneStringList* labels, bool* ok) {
   Block* result = new(zone()) Block(labels, 16, false);
   Target target(&this->target_stack_, result);
   Expect(Token::LBRACE, CHECK_OK);
+  InitializationBlockFinder block_finder(top_scope_, target_stack_);
   while (peek() != Token::RBRACE) {
     Statement* stat = ParseStatement(NULL, CHECK_OK);
-    if (stat && !stat->IsEmpty()) result->AddStatement(stat);
+    if (stat && !stat->IsEmpty()) {
+      result->AddStatement(stat);
+      block_finder.Update(stat);
+    }
   }
   Expect(Token::RBRACE, CHECK_OK);
   return result;
diff --git a/deps/v8/src/platform-cygwin.cc b/deps/v8/src/platform-cygwin.cc
index 0242f7b2bd..5f283c3571 100644
--- a/deps/v8/src/platform-cygwin.cc
+++ b/deps/v8/src/platform-cygwin.cc
@@ -166,23 +166,6 @@ void OS::Free(void* address, const size_t size) {
 }
 
 
-#ifdef ENABLE_HEAP_PROTECTION
-
-void OS::Protect(void* address, size_t size) {
-  // TODO(1240712): mprotect has a return value which is ignored here.
-  mprotect(address, size, PROT_READ);
-}
-
-
-void OS::Unprotect(void* address, size_t size, bool is_executable) {
-  // TODO(1240712): mprotect has a return value which is ignored here.
-  int prot = PROT_READ | PROT_WRITE | (is_executable ? PROT_EXEC : 0);
-  mprotect(address, size, prot);
-}
-
-#endif
-
-
 void OS::Sleep(int milliseconds) {
   unsigned int ms = static_cast<unsigned int>(milliseconds);
   usleep(1000 * ms);
@@ -249,7 +232,6 @@ PosixMemoryMappedFile::~PosixMemoryMappedFile() {
 
 
 void OS::LogSharedLibraryAddresses() {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   // This function assumes that the layout of the file is as follows:
   // hex_start_addr-hex_end_addr rwxp <unused data> [binary_file_name]
   // If we encounter an unexpected situation we abort scanning further entries.
@@ -306,7 +288,6 @@ void OS::LogSharedLibraryAddresses() {
   }
   free(lib_name);
   fclose(fp);
-#endif
 }
 
 
@@ -591,8 +572,6 @@ Semaphore* OS::CreateSemaphore(int count) {
 }
 
 
-#ifdef ENABLE_LOGGING_AND_PROFILING
-
 // ----------------------------------------------------------------------------
 // Cygwin profiler support.
 //
@@ -769,7 +748,5 @@ void Sampler::Stop() {
   SetActive(false);
 }
 
-#endif  // ENABLE_LOGGING_AND_PROFILING
 
 } }  // namespace v8::internal
-
diff --git a/deps/v8/src/platform-freebsd.cc b/deps/v8/src/platform-freebsd.cc
index 755475a8a0..9d9f1b795a 100644
--- a/deps/v8/src/platform-freebsd.cc
+++ b/deps/v8/src/platform-freebsd.cc
@@ -181,20 +181,6 @@ void OS::Free(void* buf, const size_t length) {
 }
 
 
-#ifdef ENABLE_HEAP_PROTECTION
-
-void OS::Protect(void* address, size_t size) {
-  UNIMPLEMENTED();
-}
-
-
-void OS::Unprotect(void* address, size_t size, bool is_executable) {
-  UNIMPLEMENTED();
-}
-
-#endif
-
-
 void OS::Sleep(int milliseconds) {
   unsigned int ms = static_cast<unsigned int>(milliseconds);
   usleep(1000 * ms);
@@ -266,15 +252,12 @@ PosixMemoryMappedFile::~PosixMemoryMappedFile() {
 }
 
 
-#ifdef ENABLE_LOGGING_AND_PROFILING
 static unsigned StringToLong(char* buffer) {
   return static_cast<unsigned>(strtol(buffer, NULL, 16));  // NOLINT
 }
-#endif
 
 
 void OS::LogSharedLibraryAddresses() {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   static const int MAP_LENGTH = 1024;
   int fd = open("/proc/self/maps", O_RDONLY);
   if (fd < 0) return;
@@ -311,7 +294,6 @@ void OS::LogSharedLibraryAddresses() {
     LOG(i::Isolate::Current(), SharedLibraryEvent(start_of_path, start, end));
   }
   close(fd);
-#endif
 }
 
 
@@ -588,8 +570,6 @@ Semaphore* OS::CreateSemaphore(int count) {
 }
 
 
-#ifdef ENABLE_LOGGING_AND_PROFILING
-
 static pthread_t GetThreadID() {
   pthread_t thread_id = pthread_self();
   return thread_id;
@@ -817,6 +797,5 @@ void Sampler::Stop() {
   SetActive(false);
 }
 
-#endif  // ENABLE_LOGGING_AND_PROFILING
 
 } }  // namespace v8::internal
diff --git a/deps/v8/src/platform-linux.cc b/deps/v8/src/platform-linux.cc
index d2866cae45..ab22a79cd4 100644
--- a/deps/v8/src/platform-linux.cc
+++ b/deps/v8/src/platform-linux.cc
@@ -390,23 +390,6 @@ void OS::Free(void* address, const size_t size) {
 }
 
 
-#ifdef ENABLE_HEAP_PROTECTION
-
-void OS::Protect(void* address, size_t size) {
-  // TODO(1240712): mprotect has a return value which is ignored here.
-  mprotect(address, size, PROT_READ);
-}
-
-
-void OS::Unprotect(void* address, size_t size, bool is_executable) {
-  // TODO(1240712): mprotect has a return value which is ignored here.
-  int prot = PROT_READ | PROT_WRITE | (is_executable ? PROT_EXEC : 0);
-  mprotect(address, size, prot);
-}
-
-#endif
-
-
 void OS::Sleep(int milliseconds) {
   unsigned int ms = static_cast<unsigned int>(milliseconds);
   usleep(1000 * ms);
@@ -483,7 +466,6 @@ PosixMemoryMappedFile::~PosixMemoryMappedFile() {
 
 
 void OS::LogSharedLibraryAddresses() {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   // This function assumes that the layout of the file is as follows:
   // hex_start_addr-hex_end_addr rwxp <unused data> [binary_file_name]
   // If we encounter an unexpected situation we abort scanning further entries.
@@ -540,7 +522,6 @@ void OS::LogSharedLibraryAddresses() {
   }
   free(lib_name);
   fclose(fp);
-#endif
 }
 
 
@@ -548,7 +529,6 @@ static const char kGCFakeMmap[] = "/tmp/__v8_gc__";
 
 
 void OS::SignalCodeMovingGC() {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   // Support for ll_prof.py.
   //
   // The Linux profiler built into the kernel logs all mmap's with
@@ -564,7 +544,6 @@ void OS::SignalCodeMovingGC() {
   ASSERT(addr != MAP_FAILED);
   munmap(addr, size);
   fclose(f);
-#endif
 }
 
 
@@ -859,8 +838,6 @@ Semaphore* OS::CreateSemaphore(int count) {
 }
 
 
-#ifdef ENABLE_LOGGING_AND_PROFILING
-
 #if !defined(__GLIBC__) && (defined(__arm__) || defined(__thumb__))
 // Android runs a fairly new Linux kernel, so signal info is there,
 // but the C library doesn't have the structs defined.
@@ -1148,6 +1125,5 @@ void Sampler::Stop() {
   SetActive(false);
 }
 
-#endif  // ENABLE_LOGGING_AND_PROFILING
 
 } }  // namespace v8::internal
diff --git a/deps/v8/src/platform-macos.cc b/deps/v8/src/platform-macos.cc
index 104729af5d..be6e1572dc 100644
--- a/deps/v8/src/platform-macos.cc
+++ b/deps/v8/src/platform-macos.cc
@@ -169,20 +169,6 @@ void OS::Free(void* address, const size_t size) {
 }
 
 
-#ifdef ENABLE_HEAP_PROTECTION
-
-void OS::Protect(void* address, size_t size) {
-  UNIMPLEMENTED();
-}
-
-
-void OS::Unprotect(void* address, size_t size, bool is_executable) {
-  UNIMPLEMENTED();
-}
-
-#endif
-
-
 void OS::Sleep(int milliseconds) {
   usleep(1000 * milliseconds);
 }
@@ -248,7 +234,6 @@ PosixMemoryMappedFile::~PosixMemoryMappedFile() {
 
 
 void OS::LogSharedLibraryAddresses() {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   unsigned int images_count = _dyld_image_count();
   for (unsigned int i = 0; i < images_count; ++i) {
     const mach_header* header = _dyld_get_image_header(i);
@@ -270,7 +255,6 @@ void OS::LogSharedLibraryAddresses() {
     LOG(Isolate::Current(),
         SharedLibraryEvent(_dyld_get_image_name(i), start, start + size));
   }
-#endif  // ENABLE_LOGGING_AND_PROFILING
 }
 
 
@@ -644,8 +628,6 @@ Semaphore* OS::CreateSemaphore(int count) {
 }
 
 
-#ifdef ENABLE_LOGGING_AND_PROFILING
-
 class Sampler::PlatformData : public Malloced {
  public:
   PlatformData() : profiled_thread_(mach_thread_self()) {}
@@ -821,6 +803,5 @@ void Sampler::Stop() {
   SetActive(false);
 }
 
-#endif  // ENABLE_LOGGING_AND_PROFILING
 
 } }  // namespace v8::internal
diff --git a/deps/v8/src/platform-nullos.cc b/deps/v8/src/platform-nullos.cc
index d309806ec7..08480ca800 100644
--- a/deps/v8/src/platform-nullos.cc
+++ b/deps/v8/src/platform-nullos.cc
@@ -217,20 +217,6 @@ void OS::Free(void* buf, const size_t length) {
 }
 
 
-#ifdef ENABLE_HEAP_PROTECTION
-
-void OS::Protect(void* address, size_t size) {
-  UNIMPLEMENTED();
-}
-
-
-void OS::Unprotect(void* address, size_t size, bool is_executable) {
-  UNIMPLEMENTED();
-}
-
-#endif
-
-
 void OS::Sleep(int milliseconds) {
   UNIMPLEMENTED();
 }
@@ -437,7 +423,6 @@ Semaphore* OS::CreateSemaphore(int count) {
   return new NullSemaphore(count);
 }
 
-#ifdef ENABLE_LOGGING_AND_PROFILING
 
 class ProfileSampler::PlatformData  : public Malloced {
  public:
@@ -472,6 +457,5 @@ void ProfileSampler::Stop() {
   UNIMPLEMENTED();
 }
 
-#endif  // ENABLE_LOGGING_AND_PROFILING
 
 } }  // namespace v8::internal
diff --git a/deps/v8/src/platform-openbsd.cc b/deps/v8/src/platform-openbsd.cc
index ceabb51f10..973329b9b1 100644
--- a/deps/v8/src/platform-openbsd.cc
+++ b/deps/v8/src/platform-openbsd.cc
@@ -179,20 +179,6 @@ void OS::Free(void* buf, const size_t length) {
 }
 
 
-#ifdef ENABLE_HEAP_PROTECTION
-
-void OS::Protect(void* address, size_t size) {
-  UNIMPLEMENTED();
-}
-
-
-void OS::Unprotect(void* address, size_t size, bool is_executable) {
-  UNIMPLEMENTED();
-}
-
-#endif
-
-
 void OS::Sleep(int milliseconds) {
   unsigned int ms = static_cast<unsigned int>(milliseconds);
   usleep(1000 * ms);
@@ -264,15 +250,12 @@ PosixMemoryMappedFile::~PosixMemoryMappedFile() {
 }
 
 
-#ifdef ENABLE_LOGGING_AND_PROFILING
 static unsigned StringToLong(char* buffer) {
   return static_cast<unsigned>(strtol(buffer, NULL, 16));  // NOLINT
 }
-#endif
 
 
 void OS::LogSharedLibraryAddresses() {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   static const int MAP_LENGTH = 1024;
   int fd = open("/proc/self/maps", O_RDONLY);
   if (fd < 0) return;
@@ -309,7 +292,6 @@ void OS::LogSharedLibraryAddresses() {
     LOG(i::Isolate::Current(), SharedLibraryEvent(start_of_path, start, end));
   }
   close(fd);
-#endif
 }
 
 
@@ -590,8 +572,6 @@ Semaphore* OS::CreateSemaphore(int count) {
 }
 
 
-#ifdef ENABLE_LOGGING_AND_PROFILING
-
 static pthread_t GetThreadID() {
   pthread_t thread_id = pthread_self();
   return thread_id;
@@ -818,6 +798,5 @@ void Sampler::Stop() {
   SetActive(false);
 }
 
-#endif  // ENABLE_LOGGING_AND_PROFILING
 
 } }  // namespace v8::internal
diff --git a/deps/v8/src/platform-posix.cc b/deps/v8/src/platform-posix.cc
index 83f6c8112e..5be305af92 100644
--- a/deps/v8/src/platform-posix.cc
+++ b/deps/v8/src/platform-posix.cc
@@ -37,6 +37,7 @@
 #include <sys/resource.h>
 #include <sys/time.h>
 #include <sys/types.h>
+#include <sys/stat.h>
 
 #include <arpa/inet.h>
 #include <netinet/in.h>
@@ -130,7 +131,14 @@ int OS::GetLastError() {
 //
 
 FILE* OS::FOpen(const char* path, const char* mode) {
-  return fopen(path, mode);
+  FILE* file = fopen(path, mode);
+  if (file == NULL) return NULL;
+  struct stat file_stat;
+  if (fstat(fileno(file), &file_stat) != 0) return NULL;
+  bool is_regular_file = ((file_stat.st_mode & S_IFREG) != 0);
+  if (is_regular_file) return file;
+  fclose(file);
+  return NULL;
 }
 
 
@@ -139,6 +147,11 @@ bool OS::Remove(const char* path) {
 }
 
 
+FILE* OS::OpenTemporaryFile() {
+  return tmpfile();
+}
+
+
 const char* const OS::LogFileOpenMode = "w";
 
 
diff --git a/deps/v8/src/platform-solaris.cc b/deps/v8/src/platform-solaris.cc
index ca15b07f11..1e79f102f5 100644
--- a/deps/v8/src/platform-solaris.cc
+++ b/deps/v8/src/platform-solaris.cc
@@ -192,23 +192,6 @@ void OS::Free(void* address, const size_t size) {
 }
 
 
-#ifdef ENABLE_HEAP_PROTECTION
-
-void OS::Protect(void* address, size_t size) {
-  // TODO(1240712): mprotect has a return value which is ignored here.
-  mprotect(address, size, PROT_READ);
-}
-
-
-void OS::Unprotect(void* address, size_t size, bool is_executable) {
-  // TODO(1240712): mprotect has a return value which is ignored here.
-  int prot = PROT_READ | PROT_WRITE | (is_executable ? PROT_EXEC : 0);
-  mprotect(address, size, prot);
-}
-
-#endif
-
-
 void OS::Sleep(int milliseconds) {
   useconds_t ms = static_cast<useconds_t>(milliseconds);
   usleep(1000 * ms);
@@ -589,8 +572,6 @@ Semaphore* OS::CreateSemaphore(int count) {
 }
 
 
-#ifdef ENABLE_LOGGING_AND_PROFILING
-
 static pthread_t GetThreadID() {
   return pthread_self();
 }
@@ -817,6 +798,4 @@ void Sampler::Stop() {
   SetActive(false);
 }
 
-#endif  // ENABLE_LOGGING_AND_PROFILING
-
 } }  // namespace v8::internal
diff --git a/deps/v8/src/platform-tls.h b/deps/v8/src/platform-tls.h
index 564917540b..32516636be 100644
--- a/deps/v8/src/platform-tls.h
+++ b/deps/v8/src/platform-tls.h
@@ -30,7 +30,7 @@
 #ifndef V8_PLATFORM_TLS_H_
 #define V8_PLATFORM_TLS_H_
 
-#ifdef V8_FAST_TLS
+#ifndef V8_NO_FAST_TLS
 
 // When fast TLS is requested we include the appropriate
 // implementation header.
diff --git a/deps/v8/src/platform-win32.cc b/deps/v8/src/platform-win32.cc
index c226e2f3f8..35b1a8eced 100644
--- a/deps/v8/src/platform-win32.cc
+++ b/deps/v8/src/platform-win32.cc
@@ -44,11 +44,6 @@
 namespace v8 {
 namespace internal {
 
-intptr_t OS::MaxVirtualMemory() {
-  return 0;
-}
-
-
 // Test for finite value - usually defined in math.h
 int isfinite(double x) {
   return _finite(x);
@@ -143,16 +138,39 @@ int fopen_s(FILE** pFile, const char* filename, const char* mode) {
 }
 
 
+#define _TRUNCATE 0
+#define STRUNCATE 80
+
 int _vsnprintf_s(char* buffer, size_t sizeOfBuffer, size_t count,
                  const char* format, va_list argptr) {
+  ASSERT(count == _TRUNCATE);
   return _vsnprintf(buffer, sizeOfBuffer, format, argptr);
 }
-#define _TRUNCATE 0
 
 
-int strncpy_s(char* strDest, size_t numberOfElements,
-              const char* strSource, size_t count) {
-  strncpy(strDest, strSource, count);
+int strncpy_s(char* dest, size_t dest_size, const char* source, size_t count) {
+  CHECK(source != NULL);
+  CHECK(dest != NULL);
+  CHECK_GT(dest_size, 0);
+
+  if (count == _TRUNCATE) {
+    while (dest_size > 0 && *source != 0) {
+      *(dest++) = *(source++);
+      --dest_size;
+    }
+    if (dest_size == 0) {
+      *(dest - 1) = 0;
+      return STRUNCATE;
+    }
+  } else {
+    while (dest_size > 0 && count > 0 && *source != 0) {
+      *(dest++) = *(source++);
+      --dest_size;
+      --count;
+    }
+  }
+  CHECK_GT(dest_size, 0);
+  *dest = 0;
   return 0;
 }
 
@@ -174,6 +192,11 @@ int random() {
 namespace v8 {
 namespace internal {
 
+intptr_t OS::MaxVirtualMemory() {
+  return 0;
+}
+
+
 double ceiling(double x) {
   return ceil(x);
 }
@@ -717,6 +740,24 @@ bool OS::Remove(const char* path) {
 }
 
 
+FILE* OS::OpenTemporaryFile() {
+  // tmpfile_s tries to use the root dir, don't use it.
+  char tempPathBuffer[MAX_PATH];
+  DWORD path_result = 0;
+  path_result = GetTempPathA(MAX_PATH, tempPathBuffer);
+  if (path_result > MAX_PATH || path_result == 0) return NULL;
+  UINT name_result = 0;
+  char tempNameBuffer[MAX_PATH];
+  name_result = GetTempFileNameA(tempPathBuffer, "", 0, tempNameBuffer);
+  if (name_result == 0) return NULL;
+  FILE* result = FOpen(tempNameBuffer, "w+");  // Same mode as tmpfile uses.
+  if (result != NULL) {
+    Remove(tempNameBuffer);  // Delete on close.
+  }
+  return result;
+}
+
+
 // Open log file in binary mode to avoid /n -> /r/n conversion.
 const char* const OS::LogFileOpenMode = "wb";
 
@@ -916,25 +957,6 @@ void OS::Free(void* address, const size_t size) {
 }
 
 
-#ifdef ENABLE_HEAP_PROTECTION
-
-void OS::Protect(void* address, size_t size) {
-  // TODO(1240712): VirtualProtect has a return value which is ignored here.
-  DWORD old_protect;
-  VirtualProtect(address, size, PAGE_READONLY, &old_protect);
-}
-
-
-void OS::Unprotect(void* address, size_t size, bool is_executable) {
-  // TODO(1240712): VirtualProtect has a return value which is ignored here.
-  DWORD new_protect = is_executable ? PAGE_EXECUTE_READWRITE : PAGE_READWRITE;
-  DWORD old_protect;
-  VirtualProtect(address, size, new_protect, &old_protect);
-}
-
-#endif
-
-
 void OS::Sleep(int milliseconds) {
   ::Sleep(milliseconds);
 }
@@ -1835,8 +1857,6 @@ Socket* OS::CreateSocket() {
 }
 
 
-#ifdef ENABLE_LOGGING_AND_PROFILING
-
 // ----------------------------------------------------------------------------
 // Win32 profiler support.
 
@@ -2011,6 +2031,5 @@ void Sampler::Stop() {
   SetActive(false);
 }
 
-#endif  // ENABLE_LOGGING_AND_PROFILING
 
 } }  // namespace v8::internal
diff --git a/deps/v8/src/platform.h b/deps/v8/src/platform.h
index 06d3ca4676..c7fe984c45 100644
--- a/deps/v8/src/platform.h
+++ b/deps/v8/src/platform.h
@@ -177,6 +177,9 @@ class OS {
   static FILE* FOpen(const char* path, const char* mode);
   static bool Remove(const char* path);
 
+  // Opens a temporary file, the file is auto removed on close.
+  static FILE* OpenTemporaryFile();
+
   // Log file open mode is platform-dependent due to line ends issues.
   static const char* const LogFileOpenMode;
 
@@ -206,12 +209,6 @@ class OS {
   // Get the Alignment guaranteed by Allocate().
   static size_t AllocateAlignment();
 
-#ifdef ENABLE_HEAP_PROTECTION
-  // Protect/unprotect a block of memory by marking it read-only/writable.
-  static void Protect(void* address, size_t size);
-  static void Unprotect(void* address, size_t size, bool is_executable);
-#endif
-
   // Returns an indication of whether a pointer is in a space that
   // has been allocated by Allocate().  This method may conservatively
   // always return false, but giving more accurate information may
@@ -603,7 +600,6 @@ class TickSample {
   bool has_external_callback : 1;
 };
 
-#ifdef ENABLE_LOGGING_AND_PROFILING
 class Sampler {
  public:
   // Initialize sampler.
@@ -662,8 +658,6 @@ class Sampler {
 };
 
 
-#endif  // ENABLE_LOGGING_AND_PROFILING
-
 } }  // namespace v8::internal
 
 #endif  // V8_PLATFORM_H_
diff --git a/deps/v8/src/profile-generator-inl.h b/deps/v8/src/profile-generator-inl.h
index 747e5c7271..8f4bc6c1f2 100644
--- a/deps/v8/src/profile-generator-inl.h
+++ b/deps/v8/src/profile-generator-inl.h
@@ -28,8 +28,6 @@
 #ifndef V8_PROFILE_GENERATOR_INL_H_
 #define V8_PROFILE_GENERATOR_INL_H_
 
-#ifdef ENABLE_LOGGING_AND_PROFILING
-
 #include "profile-generator.h"
 
 namespace v8 {
@@ -123,6 +121,4 @@ uint64_t HeapEntry::id() {
 
 } }  // namespace v8::internal
 
-#endif  // ENABLE_LOGGING_AND_PROFILING
-
 #endif  // V8_PROFILE_GENERATOR_INL_H_
diff --git a/deps/v8/src/profile-generator.cc b/deps/v8/src/profile-generator.cc
index 34d7aa6347..07426f2939 100644
--- a/deps/v8/src/profile-generator.cc
+++ b/deps/v8/src/profile-generator.cc
@@ -25,8 +25,6 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-#ifdef ENABLE_LOGGING_AND_PROFILING
-
 #include "v8.h"
 
 #include "profile-generator-inl.h"
@@ -3259,5 +3257,3 @@ String* GetConstructorNameForHeapProfile(JSObject* object) {
 }
 
 } }  // namespace v8::internal
-
-#endif  // ENABLE_LOGGING_AND_PROFILING
diff --git a/deps/v8/src/profile-generator.h b/deps/v8/src/profile-generator.h
index 3d0584b630..d1c2b3804a 100644
--- a/deps/v8/src/profile-generator.h
+++ b/deps/v8/src/profile-generator.h
@@ -28,8 +28,6 @@
 #ifndef V8_PROFILE_GENERATOR_H_
 #define V8_PROFILE_GENERATOR_H_
 
-#ifdef ENABLE_LOGGING_AND_PROFILING
-
 #include "allocation.h"
 #include "hashmap.h"
 #include "../include/v8-profiler.h"
@@ -1126,6 +1124,4 @@ String* GetConstructorNameForHeapProfile(JSObject* object);
 
 } }  // namespace v8::internal
 
-#endif  // ENABLE_LOGGING_AND_PROFILING
-
 #endif  // V8_PROFILE_GENERATOR_H_
diff --git a/deps/v8/src/property.h b/deps/v8/src/property.h
index 87f9ea3d54..ddecc92198 100644
--- a/deps/v8/src/property.h
+++ b/deps/v8/src/property.h
@@ -206,6 +206,7 @@ class LookupResult BASE_EMBEDDED {
     lookup_type_ = HANDLER_TYPE;
     holder_ = NULL;
     details_ = PropertyDetails(NONE, HANDLER);
+    cacheable_ = false;
   }
 
   void InterceptorResult(JSObject* holder) {
diff --git a/deps/v8/src/proxy.js b/deps/v8/src/proxy.js
index cb9c020e35..27524bd918 100644
--- a/deps/v8/src/proxy.js
+++ b/deps/v8/src/proxy.js
@@ -135,3 +135,15 @@ function DerivedSetTrap(receiver, name, val) {
 function DerivedHasTrap(name) {
   return !!this.getPropertyDescriptor(name)
 }
+
+function DerivedKeysTrap() {
+  var names = this.getOwnPropertyNames()
+  var enumerableNames = []
+  for (var i = 0, count = 0; i < names.length; ++i) {
+    var name = names[i]
+    if (this.getOwnPropertyDescriptor(TO_STRING_INLINE(name)).enumerable) {
+      enumerableNames[count++] = names[i]
+    }
+  }
+  return enumerableNames
+}
diff --git a/deps/v8/src/runtime-profiler.cc b/deps/v8/src/runtime-profiler.cc
index 7a0dd91f70..917f6d0d66 100644
--- a/deps/v8/src/runtime-profiler.cc
+++ b/deps/v8/src/runtime-profiler.cc
@@ -61,9 +61,7 @@ static const int kSizeLimit = 1500;
 Atomic32 RuntimeProfiler::state_ = 0;
 // TODO(isolates): Create the semaphore lazily and clean it up when no
 // longer required.
-#ifdef ENABLE_LOGGING_AND_PROFILING
 Semaphore* RuntimeProfiler::semaphore_ = OS::CreateSemaphore(0);
-#endif
 
 #ifdef DEBUG
 bool RuntimeProfiler::has_been_globally_setup_ = false;
@@ -245,9 +243,7 @@ void RuntimeProfiler::OptimizeNow() {
 
 
 void RuntimeProfiler::NotifyTick() {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   isolate_->stack_guard()->RequestRuntimeProfilerTick();
-#endif
 }
 
 
@@ -295,7 +291,6 @@ void RuntimeProfiler::UpdateSamplesAfterScavenge() {
 
 
 void RuntimeProfiler::HandleWakeUp(Isolate* isolate) {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   // The profiler thread must still be waiting.
   ASSERT(NoBarrier_Load(&state_) >= 0);
   // In IsolateEnteredJS we have already incremented the counter and
@@ -303,7 +298,6 @@ void RuntimeProfiler::HandleWakeUp(Isolate* isolate) {
   // to get the right count of active isolates.
   NoBarrier_AtomicIncrement(&state_, 1);
   semaphore_->Signal();
-#endif
 }
 
 
@@ -313,18 +307,15 @@ bool RuntimeProfiler::IsSomeIsolateInJS() {
 
 
 bool RuntimeProfiler::WaitForSomeIsolateToEnterJS() {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   Atomic32 old_state = NoBarrier_CompareAndSwap(&state_, 0, -1);
   ASSERT(old_state >= -1);
   if (old_state != 0) return false;
   semaphore_->Wait();
-#endif
   return true;
 }
 
 
 void RuntimeProfiler::StopRuntimeProfilerThreadBeforeShutdown(Thread* thread) {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   // Do a fake increment. If the profiler is waiting on the semaphore,
   // the returned state is 0, which can be left as an initial state in
   // case profiling is restarted later. If the profiler is not
@@ -343,7 +334,6 @@ void RuntimeProfiler::StopRuntimeProfilerThreadBeforeShutdown(Thread* thread) {
   if (new_state != 0) {
     NoBarrier_AtomicIncrement(&state_, -1);
   }
-#endif
 }
 
 
@@ -365,11 +355,9 @@ void RuntimeProfiler::UpdateSamplesAfterCompact(ObjectVisitor* visitor) {
 
 
 bool RuntimeProfilerRateLimiter::SuspendIfNecessary() {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   if (!RuntimeProfiler::IsSomeIsolateInJS()) {
     return RuntimeProfiler::WaitForSomeIsolateToEnterJS();
   }
-#endif
   return false;
 }
 
diff --git a/deps/v8/src/runtime.cc b/deps/v8/src/runtime.cc
index 5e96ef8e1c..56507aeb42 100644
--- a/deps/v8/src/runtime.cc
+++ b/deps/v8/src/runtime.cc
@@ -628,11 +628,10 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_GetPrototype) {
   NoHandleAllocation ha;
   ASSERT(args.length() == 1);
   Object* obj = args[0];
-  obj = obj->GetPrototype();
-  while (obj->IsJSObject() &&
-         JSObject::cast(obj)->map()->is_hidden_prototype()) {
+  do {
     obj = obj->GetPrototype();
-  }
+  } while (obj->IsJSObject() &&
+           JSObject::cast(obj)->map()->is_hidden_prototype());
   return obj;
 }
 
@@ -10060,8 +10059,10 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_GetFrameDetails) {
   int position =
       it.frame()->LookupCode()->SourcePosition(it.frame()->pc());
 
-  // Check for constructor frame.
-  bool constructor = it.frame()->IsConstructor();
+  // Check for constructor frame. Inlined frames cannot be construct calls.
+  bool inlined_frame =
+      it.frame()->is_optimized() && deoptimized_frame_index != 0;
+  bool constructor = !inlined_frame && it.frame()->IsConstructor();
 
   // Get scope info and read from it for local variable information.
   Handle<JSFunction> function(JSFunction::cast(it.frame()->function()));
@@ -10151,8 +10152,12 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_GetFrameDetails) {
   // Find the number of arguments to fill. At least fill the number of
   // parameters for the function and fill more if more parameters are provided.
   int argument_count = info.number_of_parameters();
-  if (argument_count < it.frame()->ComputeParametersCount()) {
-    argument_count = it.frame()->ComputeParametersCount();
+  if (it.frame()->is_optimized()) {
+    ASSERT_EQ(argument_count, deoptimized_frame->parameters_count());
+  } else {
+    if (argument_count < it.frame()->ComputeParametersCount()) {
+      argument_count = it.frame()->ComputeParametersCount();
+    }
   }
 
   // Calculate the size of the result.
@@ -10165,7 +10170,13 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_GetFrameDetails) {
   details->set(kFrameDetailsFrameIdIndex, *frame_id);
 
   // Add the function (same as in function frame).
-  details->set(kFrameDetailsFunctionIndex, it.frame()->function());
+  if (it.frame()->is_optimized()) {
+    // Get the function from the deoptimized frame.
+    details->set(kFrameDetailsFunctionIndex, deoptimized_frame->GetFunction());
+  } else {
+    // Get the function from the stack.
+    details->set(kFrameDetailsFunctionIndex, it.frame()->function());
+  }
 
   // Add the arguments count.
   details->set(kFrameDetailsArgumentCountIndex, Smi::FromInt(argument_count));
@@ -10215,16 +10226,17 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_GetFrameDetails) {
       details->set(details_index++, heap->undefined_value());
     }
 
-    // Parameter value. If we are inspecting an optimized frame, use
-    // undefined as the value.
-    //
-    // TODO(3141533): We should be able to get the actual parameter
-    // value for optimized frames.
-    if (!it.frame()->is_optimized() &&
-        (i < it.frame()->ComputeParametersCount())) {
-      details->set(details_index++, it.frame()->GetParameter(i));
+    // Parameter value.
+    if (it.frame()->is_optimized()) {
+      // Get the value from the deoptimized frame.
+      details->set(details_index++, deoptimized_frame->GetParameter(i));
     } else {
-      details->set(details_index++, heap->undefined_value());
+      if (i < it.frame()->ComputeParametersCount()) {
+        // Get the value from the stack.
+        details->set(details_index++, it.frame()->GetParameter(i));
+      } else {
+        details->set(details_index++, heap->undefined_value());
+      }
     }
   }
 
@@ -12133,7 +12145,6 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_SummarizeLOL) {
 #endif  // ENABLE_DEBUGGER_SUPPORT
 
 
-#ifdef ENABLE_LOGGING_AND_PROFILING
 RUNTIME_FUNCTION(MaybeObject*, Runtime_ProfilerResume) {
   NoHandleAllocation ha;
   v8::V8::ResumeProfiler();
@@ -12147,7 +12158,6 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_ProfilerPause) {
   return isolate->heap()->undefined_value();
 }
 
-#endif  // ENABLE_LOGGING_AND_PROFILING
 
 // Finds the script object from the script data. NOTE: This operation uses
 // heap traversal to find the function generated for the source position
diff --git a/deps/v8/src/runtime.h b/deps/v8/src/runtime.h
index 0900fd3606..e59c82cd64 100644
--- a/deps/v8/src/runtime.h
+++ b/deps/v8/src/runtime.h
@@ -349,7 +349,10 @@ namespace internal {
   F(HasExternalIntElements, 1, 1) \
   F(HasExternalUnsignedIntElements, 1, 1) \
   F(HasExternalFloatElements, 1, 1) \
-  F(HasExternalDoubleElements, 1, 1)
+  F(HasExternalDoubleElements, 1, 1) \
+  /* profiler */ \
+  F(ProfilerResume, 0, 1) \
+  F(ProfilerPause, 0, 1)
 
 
 #ifdef ENABLE_DEBUGGER_SUPPORT
@@ -427,14 +430,6 @@ namespace internal {
 #define RUNTIME_FUNCTION_LIST_DEBUGGER_SUPPORT(F)
 #endif
 
-#ifdef ENABLE_LOGGING_AND_PROFILING
-#define RUNTIME_FUNCTION_LIST_PROFILER_SUPPORT(F) \
-  F(ProfilerResume, 0, 1) \
-  F(ProfilerPause, 0, 1)
-#else
-#define RUNTIME_FUNCTION_LIST_PROFILER_SUPPORT(F)
-#endif
-
 #ifdef DEBUG
 #define RUNTIME_FUNCTION_LIST_DEBUG(F) \
   /* Testing */ \
@@ -452,8 +447,7 @@ namespace internal {
   RUNTIME_FUNCTION_LIST_ALWAYS_1(F) \
   RUNTIME_FUNCTION_LIST_ALWAYS_2(F) \
   RUNTIME_FUNCTION_LIST_DEBUG(F) \
-  RUNTIME_FUNCTION_LIST_DEBUGGER_SUPPORT(F) \
-  RUNTIME_FUNCTION_LIST_PROFILER_SUPPORT(F)
+  RUNTIME_FUNCTION_LIST_DEBUGGER_SUPPORT(F)
 
 // ----------------------------------------------------------------------------
 // INLINE_FUNCTION_LIST defines all inlined functions accessed
diff --git a/deps/v8/src/scopeinfo.cc b/deps/v8/src/scopeinfo.cc
index ccc2cc8200..3e18368f74 100644
--- a/deps/v8/src/scopeinfo.cc
+++ b/deps/v8/src/scopeinfo.cc
@@ -32,6 +32,8 @@
 #include "scopeinfo.h"
 #include "scopes.h"
 
+#include "allocation-inl.h"
+
 namespace v8 {
 namespace internal {
 
diff --git a/deps/v8/src/scopes.cc b/deps/v8/src/scopes.cc
index 5546875c4b..c6e2a4650e 100644
--- a/deps/v8/src/scopes.cc
+++ b/deps/v8/src/scopes.cc
@@ -34,6 +34,8 @@
 #include "prettyprinter.h"
 #include "scopeinfo.h"
 
+#include "allocation-inl.h"
+
 namespace v8 {
 namespace internal {
 
diff --git a/deps/v8/src/serialize.cc b/deps/v8/src/serialize.cc
index d960afde40..8cde580fbb 100644
--- a/deps/v8/src/serialize.cc
+++ b/deps/v8/src/serialize.cc
@@ -284,7 +284,6 @@ void ExternalReferenceTable::PopulateTable(Isolate* isolate) {
   const char* AddressNames[] = {
 #define C(name) "Isolate::" #name,
     ISOLATE_ADDRESS_LIST(C)
-    ISOLATE_ADDRESS_LIST_PROF(C)
     NULL
 #undef C
   };
diff --git a/deps/v8/src/spaces-inl.h b/deps/v8/src/spaces-inl.h
index 070f970577..ca1177f33c 100644
--- a/deps/v8/src/spaces-inl.h
+++ b/deps/v8/src/spaces-inl.h
@@ -378,35 +378,6 @@ bool MemoryAllocator::InInitialChunk(Address address) {
 }
 
 
-#ifdef ENABLE_HEAP_PROTECTION
-
-void MemoryAllocator::Protect(Address start, size_t size) {
-  OS::Protect(start, size);
-}
-
-
-void MemoryAllocator::Unprotect(Address start,
-                                size_t size,
-                                Executability executable) {
-  OS::Unprotect(start, size, executable);
-}
-
-
-void MemoryAllocator::ProtectChunkFromPage(Page* page) {
-  int id = GetChunkId(page);
-  OS::Protect(chunks_[id].address(), chunks_[id].size());
-}
-
-
-void MemoryAllocator::UnprotectChunkFromPage(Page* page) {
-  int id = GetChunkId(page);
-  OS::Unprotect(chunks_[id].address(), chunks_[id].size(),
-                chunks_[id].owner()->executable() == EXECUTABLE);
-}
-
-#endif
-
-
 // --------------------------------------------------------------------------
 // PagedSpace
 
diff --git a/deps/v8/src/spaces.cc b/deps/v8/src/spaces.cc
index 23c87cd0c5..d41ce5589c 100644
--- a/deps/v8/src/spaces.cc
+++ b/deps/v8/src/spaces.cc
@@ -868,30 +868,6 @@ void PagedSpace::TearDown() {
 }
 
 
-#ifdef ENABLE_HEAP_PROTECTION
-
-void PagedSpace::Protect() {
-  Page* page = first_page_;
-  while (page->is_valid()) {
-    Isolate::Current()->memory_allocator()->ProtectChunkFromPage(page);
-    page = Isolate::Current()->memory_allocator()->
-        FindLastPageInSameChunk(page)->next_page();
-  }
-}
-
-
-void PagedSpace::Unprotect() {
-  Page* page = first_page_;
-  while (page->is_valid()) {
-    Isolate::Current()->memory_allocator()->UnprotectChunkFromPage(page);
-    page = Isolate::Current()->memory_allocator()->
-        FindLastPageInSameChunk(page)->next_page();
-  }
-}
-
-#endif
-
-
 void PagedSpace::MarkAllPagesClean() {
   PageIterator it(this, PageIterator::ALL_PAGES);
   while (it.has_next()) {
@@ -1196,7 +1172,6 @@ bool NewSpace::Setup(Address start, int size) {
   ASSERT(IsPowerOf2(maximum_semispace_capacity));
 
   // Allocate and setup the histogram arrays if necessary.
-#if defined(DEBUG) || defined(ENABLE_LOGGING_AND_PROFILING)
   allocated_histogram_ = NewArray<HistogramInfo>(LAST_TYPE + 1);
   promoted_histogram_ = NewArray<HistogramInfo>(LAST_TYPE + 1);
 
@@ -1204,7 +1179,6 @@ bool NewSpace::Setup(Address start, int size) {
                        promoted_histogram_[name].set_name(#name);
   INSTANCE_TYPE_LIST(SET_NAME)
 #undef SET_NAME
-#endif
 
   ASSERT(size == 2 * heap()->ReservedSemiSpaceSize());
   ASSERT(IsAddressAligned(start, size, 0));
@@ -1236,7 +1210,6 @@ bool NewSpace::Setup(Address start, int size) {
 
 
 void NewSpace::TearDown() {
-#if defined(DEBUG) || defined(ENABLE_LOGGING_AND_PROFILING)
   if (allocated_histogram_) {
     DeleteArray(allocated_histogram_);
     allocated_histogram_ = NULL;
@@ -1245,7 +1218,6 @@ void NewSpace::TearDown() {
     DeleteArray(promoted_histogram_);
     promoted_histogram_ = NULL;
   }
-#endif
 
   start_ = NULL;
   allocation_info_.top = NULL;
@@ -1258,24 +1230,6 @@ void NewSpace::TearDown() {
 }
 
 
-#ifdef ENABLE_HEAP_PROTECTION
-
-void NewSpace::Protect() {
-  heap()->isolate()->memory_allocator()->Protect(ToSpaceLow(), Capacity());
-  heap()->isolate()->memory_allocator()->Protect(FromSpaceLow(), Capacity());
-}
-
-
-void NewSpace::Unprotect() {
-  heap()->isolate()->memory_allocator()->Unprotect(ToSpaceLow(), Capacity(),
-                                                   to_space_.executable());
-  heap()->isolate()->memory_allocator()->Unprotect(FromSpaceLow(), Capacity(),
-                                                   from_space_.executable());
-}
-
-#endif
-
-
 void NewSpace::Flip() {
   SemiSpace tmp = from_space_;
   from_space_ = to_space_;
@@ -1638,7 +1592,6 @@ static void ReportHistogram(bool print_spill) {
 
 
 // Support for statistics gathering for --heap-stats and --log-gc.
-#if defined(DEBUG) || defined(ENABLE_LOGGING_AND_PROFILING)
 void NewSpace::ClearHistograms() {
   for (int i = 0; i <= LAST_TYPE; i++) {
     allocated_histogram_[i].clear();
@@ -1648,9 +1601,7 @@ void NewSpace::ClearHistograms() {
 
 // Because the copying collector does not touch garbage objects, we iterate
 // the new space before a collection to get a histogram of allocated objects.
-// This only happens (1) when compiled with DEBUG and the --heap-stats flag is
-// set, or when compiled with ENABLE_LOGGING_AND_PROFILING and the --log-gc
-// flag is set.
+// This only happens when --log-gc flag is set.
 void NewSpace::CollectStatistics() {
   ClearHistograms();
   SemiSpaceIterator it(this);
@@ -1659,7 +1610,6 @@ void NewSpace::CollectStatistics() {
 }
 
 
-#ifdef ENABLE_LOGGING_AND_PROFILING
 static void DoReportStatistics(Isolate* isolate,
                                HistogramInfo* info, const char* description) {
   LOG(isolate, HeapSampleBeginEvent("NewSpace", description));
@@ -1686,7 +1636,6 @@ static void DoReportStatistics(Isolate* isolate,
   }
   LOG(isolate, HeapSampleEndEvent("NewSpace", description));
 }
-#endif  // ENABLE_LOGGING_AND_PROFILING
 
 
 void NewSpace::ReportStatistics() {
@@ -1709,13 +1658,11 @@ void NewSpace::ReportStatistics() {
   }
 #endif  // DEBUG
 
-#ifdef ENABLE_LOGGING_AND_PROFILING
   if (FLAG_log_gc) {
     Isolate* isolate = ISOLATE;
     DoReportStatistics(isolate, allocated_histogram_, "allocated");
     DoReportStatistics(isolate, promoted_histogram_, "promoted");
   }
-#endif  // ENABLE_LOGGING_AND_PROFILING
 }
 
 
@@ -1733,7 +1680,6 @@ void NewSpace::RecordPromotion(HeapObject* obj) {
   promoted_histogram_[type].increment_number(1);
   promoted_histogram_[type].increment_bytes(obj->Size());
 }
-#endif  // defined(DEBUG) || defined(ENABLE_LOGGING_AND_PROFILING)
 
 
 // -----------------------------------------------------------------------------
@@ -2809,31 +2755,6 @@ void LargeObjectSpace::TearDown() {
 }
 
 
-#ifdef ENABLE_HEAP_PROTECTION
-
-void LargeObjectSpace::Protect() {
-  LargeObjectChunk* chunk = first_chunk_;
-  while (chunk != NULL) {
-    heap()->isolate()->memory_allocator()->Protect(chunk->address(),
-                                                   chunk->size());
-    chunk = chunk->next();
-  }
-}
-
-
-void LargeObjectSpace::Unprotect() {
-  LargeObjectChunk* chunk = first_chunk_;
-  while (chunk != NULL) {
-    bool is_code = chunk->GetObject()->IsCode();
-    heap()->isolate()->memory_allocator()->Unprotect(chunk->address(),
-        chunk->size(), is_code ? EXECUTABLE : NOT_EXECUTABLE);
-    chunk = chunk->next();
-  }
-}
-
-#endif
-
-
 MaybeObject* LargeObjectSpace::AllocateRawInternal(int requested_size,
                                                    int object_size,
                                                    Executability executable) {
diff --git a/deps/v8/src/spaces.h b/deps/v8/src/spaces.h
index 4024387cd8..c554a37771 100644
--- a/deps/v8/src/spaces.h
+++ b/deps/v8/src/spaces.h
@@ -380,12 +380,6 @@ class Space : public Malloced {
   // (e.g. see LargeObjectSpace).
   virtual intptr_t SizeOfObjects() { return Size(); }
 
-#ifdef ENABLE_HEAP_PROTECTION
-  // Protect/unprotect the space by marking it read-only/writable.
-  virtual void Protect() = 0;
-  virtual void Unprotect() = 0;
-#endif
-
 #ifdef DEBUG
   virtual void Print() = 0;
 #endif
@@ -641,17 +635,6 @@ class MemoryAllocator {
                                   Page** last_page,
                                   Page** last_page_in_use);
 
-#ifdef ENABLE_HEAP_PROTECTION
-  // Protect/unprotect a block of memory by marking it read-only/writable.
-  inline void Protect(Address start, size_t size);
-  inline void Unprotect(Address start, size_t size,
-                        Executability executable);
-
-  // Protect/unprotect a chunk given a page in the chunk.
-  inline void ProtectChunkFromPage(Page* page);
-  inline void UnprotectChunkFromPage(Page* page);
-#endif
-
 #ifdef DEBUG
   // Reports statistic info of the space.
   void ReportStatistics();
@@ -1157,12 +1140,6 @@ class PagedSpace : public Space {
   // Ensures that the capacity is at least 'capacity'. Returns false on failure.
   bool EnsureCapacity(int capacity);
 
-#ifdef ENABLE_HEAP_PROTECTION
-  // Protect/unprotect the space by marking it read-only/writable.
-  void Protect();
-  void Unprotect();
-#endif
-
 #ifdef DEBUG
   // Print meta info and objects in this space.
   virtual void Print();
@@ -1270,7 +1247,6 @@ class PagedSpace : public Space {
 };
 
 
-#if defined(DEBUG) || defined(ENABLE_LOGGING_AND_PROFILING)
 class NumberAndSizeInfo BASE_EMBEDDED {
  public:
   NumberAndSizeInfo() : number_(0), bytes_(0) {}
@@ -1293,9 +1269,7 @@ class NumberAndSizeInfo BASE_EMBEDDED {
 
 
 // HistogramInfo class for recording a single "bar" of a histogram.  This
-// class is used for collecting statistics to print to stdout (when compiled
-// with DEBUG) or to the log file (when compiled with
-// ENABLE_LOGGING_AND_PROFILING).
+// class is used for collecting statistics to print to the log file.
 class HistogramInfo: public NumberAndSizeInfo {
  public:
   HistogramInfo() : NumberAndSizeInfo() {}
@@ -1306,7 +1280,6 @@ class HistogramInfo: public NumberAndSizeInfo {
  private:
   const char* name_;
 };
-#endif
 
 
 // -----------------------------------------------------------------------------
@@ -1392,12 +1365,6 @@ class SemiSpace : public Space {
   bool Commit();
   bool Uncommit();
 
-#ifdef ENABLE_HEAP_PROTECTION
-  // Protect/unprotect the space by marking it read-only/writable.
-  virtual void Protect() {}
-  virtual void Unprotect() {}
-#endif
-
 #ifdef DEBUG
   virtual void Print();
   virtual void Verify();
@@ -1628,12 +1595,6 @@ class NewSpace : public Space {
   template <typename StringType>
   inline void ShrinkStringAtAllocationBoundary(String* string, int len);
 
-#ifdef ENABLE_HEAP_PROTECTION
-  // Protect/unprotect the space by marking it read-only/writable.
-  virtual void Protect();
-  virtual void Unprotect();
-#endif
-
 #ifdef DEBUG
   // Verify the active semispace.
   virtual void Verify();
@@ -1641,7 +1602,6 @@ class NewSpace : public Space {
   virtual void Print() { to_space_.Print(); }
 #endif
 
-#if defined(DEBUG) || defined(ENABLE_LOGGING_AND_PROFILING)
   // Iterates the active semispace to collect statistics.
   void CollectStatistics();
   // Reports previously collected statistics of the active semispace.
@@ -1654,7 +1614,6 @@ class NewSpace : public Space {
   // to space during a scavenge GC.
   void RecordAllocation(HeapObject* obj);
   void RecordPromotion(HeapObject* obj);
-#endif
 
   // Return whether the operation succeded.
   bool CommitFromSpaceIfNeeded() {
@@ -1683,10 +1642,8 @@ class NewSpace : public Space {
   AllocationInfo allocation_info_;
   AllocationInfo mc_forwarding_info_;
 
-#if defined(DEBUG) || defined(ENABLE_LOGGING_AND_PROFILING)
   HistogramInfo* allocated_histogram_;
   HistogramInfo* promoted_histogram_;
-#endif
 
   // Implementation of AllocateRaw and MCAllocateRaw.
   MUST_USE_RESULT inline MaybeObject* AllocateRawInternal(
@@ -2296,12 +2253,6 @@ class LargeObjectSpace : public Space {
   // may use some memory, leaving less for large objects.
   virtual bool ReserveSpace(int bytes);
 
-#ifdef ENABLE_HEAP_PROTECTION
-  // Protect/unprotect the space by marking it read-only/writable.
-  void Protect();
-  void Unprotect();
-#endif
-
 #ifdef DEBUG
   virtual void Verify();
   virtual void Print();
diff --git a/deps/v8/src/string-stream.cc b/deps/v8/src/string-stream.cc
index aea142042b..9002593bdd 100644
--- a/deps/v8/src/string-stream.cc
+++ b/deps/v8/src/string-stream.cc
@@ -1,4 +1,4 @@
-// Copyright 2006-2008 the V8 project authors. All rights reserved.
+// Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
@@ -30,6 +30,8 @@
 #include "factory.h"
 #include "string-stream.h"
 
+#include "allocation-inl.h"
+
 namespace v8 {
 namespace internal {
 
diff --git a/deps/v8/src/stub-cache.cc b/deps/v8/src/stub-cache.cc
index eb813814d4..79cd7a0d22 100644
--- a/deps/v8/src/stub-cache.cc
+++ b/deps/v8/src/stub-cache.cc
@@ -1686,23 +1686,6 @@ MaybeObject* KeyedLoadStubCompiler::GetCode(PropertyType type,
 }
 
 
-MaybeObject* KeyedLoadStubCompiler::ComputeSharedKeyedLoadElementStub(
-    Map* receiver_map) {
-  MaybeObject* maybe_stub = NULL;
-  if (receiver_map->has_fast_elements()) {
-    maybe_stub = KeyedLoadFastElementStub().TryGetCode();
-  } else if (receiver_map->has_external_array_elements()) {
-    JSObject::ElementsKind elements_kind = receiver_map->elements_kind();
-    maybe_stub = KeyedLoadExternalArrayStub(elements_kind).TryGetCode();
-  } else if (receiver_map->has_dictionary_elements()) {
-    maybe_stub = isolate()->builtins()->builtin(Builtins::kKeyedLoadIC_Slow);
-  } else {
-    UNREACHABLE();
-  }
-  return maybe_stub;
-}
-
-
 MaybeObject* StoreStubCompiler::GetCode(PropertyType type, String* name) {
   Code::Flags flags = Code::ComputeMonomorphicFlags(
       Code::STORE_IC, type, strict_mode_);
@@ -1739,21 +1722,9 @@ MaybeObject* KeyedStoreStubCompiler::GetCode(PropertyType type,
 }
 
 
-MaybeObject* KeyedStoreStubCompiler::ComputeSharedKeyedStoreElementStub(
-    Map* receiver_map) {
-  MaybeObject* maybe_stub = NULL;
-  if (receiver_map->has_fast_elements()) {
-    bool is_js_array = receiver_map->instance_type() == JS_ARRAY_TYPE;
-    maybe_stub = KeyedStoreFastElementStub(is_js_array).TryGetCode();
-  } else if (receiver_map->has_external_array_elements()) {
-    JSObject::ElementsKind elements_kind = receiver_map->elements_kind();
-    maybe_stub = KeyedStoreExternalArrayStub(elements_kind).TryGetCode();
-  } else if (receiver_map->has_dictionary_elements()) {
-    maybe_stub = isolate()->builtins()->builtin(Builtins::kKeyedStoreIC_Slow);
-  } else {
-    UNREACHABLE();
-  }
-  return maybe_stub;
+void KeyedStoreStubCompiler::GenerateStoreDictionaryElement(
+    MacroAssembler* masm) {
+  KeyedStoreIC::GenerateSlow(masm);
 }
 
 
diff --git a/deps/v8/src/stub-cache.h b/deps/v8/src/stub-cache.h
index fa2676061d..93c50fa988 100644
--- a/deps/v8/src/stub-cache.h
+++ b/deps/v8/src/stub-cache.h
@@ -662,12 +662,12 @@ class KeyedLoadStubCompiler: public StubCompiler {
 
   static void GenerateLoadFastElement(MacroAssembler* masm);
 
+  static void GenerateLoadDictionaryElement(MacroAssembler* masm);
+
  private:
   MaybeObject* GetCode(PropertyType type,
                        String* name,
                        InlineCacheState state = MONOMORPHIC);
-
-  MaybeObject* ComputeSharedKeyedLoadElementStub(Map* receiver_map);
 };
 
 
@@ -720,13 +720,13 @@ class KeyedStoreStubCompiler: public StubCompiler {
   static void GenerateStoreExternalArray(MacroAssembler* masm,
                                          JSObject::ElementsKind elements_kind);
 
+  static void GenerateStoreDictionaryElement(MacroAssembler* masm);
+
  private:
   MaybeObject* GetCode(PropertyType type,
                        String* name,
                        InlineCacheState state = MONOMORPHIC);
 
-  MaybeObject* ComputeSharedKeyedStoreElementStub(Map* receiver_map);
-
   StrictModeFlag strict_mode_;
 };
 
diff --git a/deps/v8/src/type-info.h b/deps/v8/src/type-info.h
index 75aabe8c62..0a8c935dfa 100644
--- a/deps/v8/src/type-info.h
+++ b/deps/v8/src/type-info.h
@@ -30,7 +30,6 @@
 
 #include "allocation.h"
 #include "globals.h"
-#include "zone.h"
 #include "zone-inl.h"
 
 namespace v8 {
diff --git a/deps/v8/src/v8globals.h b/deps/v8/src/v8globals.h
index a23ca194aa..d86f299f4e 100644
--- a/deps/v8/src/v8globals.h
+++ b/deps/v8/src/v8globals.h
@@ -395,12 +395,11 @@ struct AccessorDescriptor {
 };
 
 
-// Logging and profiling.
-// A StateTag represents a possible state of the VM.  When compiled with
-// ENABLE_VMSTATE_TRACKING, the logger maintains a stack of these.
-// Creating a VMState object enters a state by pushing on the stack, and
-// destroying a VMState object leaves a state by popping the current state
-// from the stack.
+// Logging and profiling.  A StateTag represents a possible state of
+// the VM. The logger maintains a stack of these. Creating a VMState
+// object enters a state by pushing on the stack, and destroying a
+// VMState object leaves a state by popping the current state from the
+// stack.
 
 #define STATE_TAG_LIST(V) \
   V(JS)                   \
diff --git a/deps/v8/src/v8natives.js b/deps/v8/src/v8natives.js
index 0afe231c8c..53a03173b3 100644
--- a/deps/v8/src/v8natives.js
+++ b/deps/v8/src/v8natives.js
@@ -308,6 +308,13 @@ function ObjectLookupSetter(name) {
 function ObjectKeys(obj) {
   if (!IS_SPEC_OBJECT(obj))
     throw MakeTypeError("obj_ctor_property_non_object", ["keys"]);
+  if (%IsJSProxy(obj)) {
+    var handler = %GetHandler(obj);
+    var keys = handler.keys;
+    if (IS_UNDEFINED(keys)) keys = DerivedKeysTrap;
+    var names = %_CallFunction(handler, keys);
+    return ToStringArray(names);
+  }
   return %LocalKeys(obj);
 }
 
@@ -315,14 +322,14 @@ function ObjectKeys(obj) {
 // ES5 8.10.1.
 function IsAccessorDescriptor(desc) {
   if (IS_UNDEFINED(desc)) return false;
-  return desc.hasGetter_ || desc.hasSetter_;
+  return desc.hasGetter() || desc.hasSetter();
 }
 
 
 // ES5 8.10.2.
 function IsDataDescriptor(desc) {
   if (IS_UNDEFINED(desc)) return false;
-  return desc.hasValue_ || desc.hasWritable_;
+  return desc.hasValue() || desc.hasWritable();
 }
 
 
@@ -354,6 +361,19 @@ function FromPropertyDescriptor(desc) {
   return obj;
 }
 
+// Harmony Proxies
+function FromGenericPropertyDescriptor(desc) {
+  if (IS_UNDEFINED(desc)) return desc;
+  var obj = new $Object();
+  if (desc.hasValue()) obj.value = desc.getValue();
+  if (desc.hasWritable()) obj.writable = desc.isWritable();
+  if (desc.hasGetter()) obj.get = desc.getGet();
+  if (desc.hasSetter()) obj.set = desc.getSet();
+  if (desc.hasEnumerable()) obj.enumerable = desc.isEnumerable();
+  if (desc.hasConfigurable()) obj.configurable = desc.isConfigurable();
+  return obj;
+}
+
 // ES5 8.10.5.
 function ToPropertyDescriptor(obj) {
   if (!IS_SPEC_OBJECT(obj)) {
@@ -404,15 +424,15 @@ function ToPropertyDescriptor(obj) {
 function ToCompletePropertyDescriptor(obj) {
   var desc = ToPropertyDescriptor(obj)
   if (IsGenericDescriptor(desc) || IsDataDescriptor(desc)) {
-    if (!("value" in desc)) desc.value = void 0;
-    if (!("writable" in desc)) desc.writable = false;
+    if (!desc.hasValue()) desc.setValue(void 0);
+    if (!desc.hasWritable()) desc.setWritable(false);
   } else {
     // Is accessor descriptor.
-    if (!("get" in desc)) desc.get = void 0;
-    if (!("set" in desc)) desc.set = void 0;
+    if (!desc.hasGetter()) desc.setGet(void 0);
+    if (!desc.hasSetter()) desc.setSet(void 0);
   }
-  if (!("enumerable" in desc)) desc.enumerable = false;
-  if (!("configurable" in desc)) desc.configurable = false;
+  if (!desc.hasEnumerable()) desc.setEnumerable(false);
+  if (!desc.hasConfigurable()) desc.setConfigurable(false);
   return desc;
 }
 
@@ -572,10 +592,10 @@ function GetProperty(obj, p) {
       throw MakeTypeError("handler_trap_missing",
                           [handler, "getPropertyDescriptor"]);
     }
-    var descriptor = getProperty.call(handler, p);
+    var descriptor = %_CallFunction(handler, p, getProperty);
     if (IS_UNDEFINED(descriptor)) return descriptor;
     var desc = ToCompletePropertyDescriptor(descriptor);
-    if (!desc.configurable) {
+    if (!desc.isConfigurable()) {
       throw MakeTypeError("proxy_prop_not_configurable",
                           [handler, "getPropertyDescriptor", p, descriptor]);
     }
@@ -595,7 +615,7 @@ function HasProperty(obj, p) {
     var handler = %GetHandler(obj);
     var has = handler.has;
     if (IS_UNDEFINED(has)) has = DerivedHasTrap;
-    return ToBoolean(has.call(handler, obj, p));
+    return ToBoolean(%_CallFunction(handler, obj, p, has));
   }
   var desc = GetProperty(obj, p);
   return IS_UNDEFINED(desc) ? false : true;
@@ -604,6 +624,23 @@ function HasProperty(obj, p) {
 
 // ES5 section 8.12.1.
 function GetOwnProperty(obj, p) {
+  if (%IsJSProxy(obj)) {
+    var handler = %GetHandler(obj);
+    var getOwnProperty = handler.getOwnPropertyDescriptor;
+    if (IS_UNDEFINED(getOwnProperty)) {
+      throw MakeTypeError("handler_trap_missing",
+                          [handler, "getOwnPropertyDescriptor"]);
+    }
+    var descriptor = %_CallFunction(handler, p, getOwnProperty);
+    if (IS_UNDEFINED(descriptor)) return descriptor;
+    var desc = ToCompletePropertyDescriptor(descriptor);
+    if (!desc.isConfigurable()) {
+      throw MakeTypeError("proxy_prop_not_configurable",
+                          [handler, "getOwnPropertyDescriptor", p, descriptor]);
+    }
+    return desc;
+  }
+
   // GetOwnProperty returns an array indexed by the constants
   // defined in macros.py.
   // If p is not a property on obj undefined is returned.
@@ -616,8 +653,32 @@ function GetOwnProperty(obj, p) {
 }
 
 
+// Harmony proxies.
+function DefineProxyProperty(obj, p, attributes, should_throw) {
+  var handler = %GetHandler(obj);
+  var defineProperty = handler.defineProperty;
+  if (IS_UNDEFINED(defineProperty)) {
+    throw MakeTypeError("handler_trap_missing", [handler, "defineProperty"]);
+  }
+  var result = %_CallFunction(handler, p, attributes, defineProperty);
+  if (!ToBoolean(result)) {
+    if (should_throw) {
+      throw MakeTypeError("handler_failed", [handler, "defineProperty"]);
+    } else {
+      return false;
+    }
+  }
+  return true;
+}
+
+
 // ES5 8.12.9.
 function DefineOwnProperty(obj, p, desc, should_throw) {
+  if (%IsJSProxy(obj)) {
+    var attributes = FromGenericPropertyDescriptor(desc);
+    return DefineProxyProperty(obj, p, attributes, should_throw);
+  }
+
   var current_or_access = %GetOwnProperty(ToObject(obj), ToString(p));
   // A false value here means that access checks failed.
   if (current_or_access === false) return void 0;
@@ -792,7 +853,8 @@ function ObjectGetPrototypeOf(obj) {
 // ES5 section 15.2.3.3
 function ObjectGetOwnPropertyDescriptor(obj, p) {
   if (!IS_SPEC_OBJECT(obj))
-    throw MakeTypeError("obj_ctor_property_non_object", ["getOwnPropertyDescriptor"]);
+    throw MakeTypeError("obj_ctor_property_non_object",
+                        ["getOwnPropertyDescriptor"]);
   var desc = GetOwnProperty(obj, p);
   return FromPropertyDescriptor(desc);
 }
@@ -831,7 +893,7 @@ function ObjectGetOwnPropertyNames(obj) {
       throw MakeTypeError("handler_trap_missing",
                           [handler, "getOwnPropertyNames"]);
     }
-    var names = getOwnPropertyNames.call(handler);
+    var names = %_CallFunction(handler, getOwnPropertyNames);
     return ToStringArray(names, "getOwnPropertyNames");
   }
 
@@ -900,8 +962,37 @@ function ObjectDefineProperty(obj, p, attributes) {
     throw MakeTypeError("obj_ctor_property_non_object", ["defineProperty"]);
   }
   var name = ToString(p);
-  var desc = ToPropertyDescriptor(attributes);
-  DefineOwnProperty(obj, name, desc, true);
+  if (%IsJSProxy(obj)) {
+    // Clone the attributes object for protection.
+    // TODO(rossberg): not spec'ed yet, so not sure if this should involve
+    // non-own properties as it does (or non-enumerable ones, as it doesn't?).
+    var attributesClone = {}
+    for (var a in attributes) {
+      attributesClone[a] = attributes[a];
+    }
+    DefineProxyProperty(obj, name, attributesClone, true);
+    // The following would implement the spec as in the current proposal,
+    // but after recent comments on es-discuss, is most likely obsolete.
+    /*
+    var defineObj = FromGenericPropertyDescriptor(desc);
+    var names = ObjectGetOwnPropertyNames(attributes);
+    var standardNames =
+      {value: 0, writable: 0, get: 0, set: 0, enumerable: 0, configurable: 0};
+    for (var i = 0; i < names.length; i++) {
+      var N = names[i];
+      if (!(%HasLocalProperty(standardNames, N))) {
+        var attr = GetOwnProperty(attributes, N);
+        DefineOwnProperty(descObj, N, attr, true);
+      }
+    }
+    // This is really confusing the types, but it is what the proxies spec
+    // currently requires:
+    desc = descObj;
+    */
+  } else {
+    var desc = ToPropertyDescriptor(attributes);
+    DefineOwnProperty(obj, name, desc, true);
+  }
   return obj;
 }
 
diff --git a/deps/v8/src/v8utils.cc b/deps/v8/src/v8utils.cc
index 89f9d953ee..bf0e05d05b 100644
--- a/deps/v8/src/v8utils.cc
+++ b/deps/v8/src/v8utils.cc
@@ -110,11 +110,11 @@ char* ReadLine(const char* prompt) {
 }
 
 
-char* ReadCharsFromFile(const char* filename,
+char* ReadCharsFromFile(FILE* file,
                         int* size,
                         int extra_space,
-                        bool verbose) {
-  FILE* file = OS::FOpen(filename, "rb");
+                        bool verbose,
+                        const char* filename) {
   if (file == NULL || fseek(file, 0, SEEK_END) != 0) {
     if (verbose) {
       OS::PrintError("Cannot read from file %s.\n", filename);
@@ -127,16 +127,26 @@ char* ReadCharsFromFile(const char* filename,
   rewind(file);
 
   char* result = NewArray<char>(*size + extra_space);
-  for (int i = 0; i < *size;) {
+  for (int i = 0; i < *size && feof(file) == 0;) {
     int read = static_cast<int>(fread(&result[i], 1, *size - i, file));
-    if (read <= 0) {
+    if (read != (*size - i) && ferror(file) != 0) {
       fclose(file);
       DeleteArray(result);
       return NULL;
     }
     i += read;
   }
-  fclose(file);
+  return result;
+}
+
+
+char* ReadCharsFromFile(const char* filename,
+                        int* size,
+                        int extra_space,
+                        bool verbose) {
+  FILE* file = OS::FOpen(filename, "rb");
+  char* result = ReadCharsFromFile(file, size, extra_space, verbose, filename);
+  if (file != NULL) fclose(file);
   return result;
 }
 
@@ -147,18 +157,34 @@ byte* ReadBytes(const char* filename, int* size, bool verbose) {
 }
 
 
+static Vector<const char> SetVectorContents(char* chars,
+                                            int size,
+                                            bool* exists) {
+  if (!chars) {
+    *exists = false;
+    return Vector<const char>::empty();
+  }
+  chars[size] = '\0';
+  *exists = true;
+  return Vector<const char>(chars, size);
+}
+
+
 Vector<const char> ReadFile(const char* filename,
                             bool* exists,
                             bool verbose) {
   int size;
   char* result = ReadCharsFromFile(filename, &size, 1, verbose);
-  if (!result) {
-    *exists = false;
-    return Vector<const char>::empty();
-  }
-  result[size] = '\0';
-  *exists = true;
-  return Vector<const char>(result, size);
+  return SetVectorContents(result, size, exists);
+}
+
+
+Vector<const char> ReadFile(FILE* file,
+                            bool* exists,
+                            bool verbose) {
+  int size;
+  char* result = ReadCharsFromFile(file, &size, 1, verbose, "");
+  return SetVectorContents(result, size, exists);
 }
 
 
diff --git a/deps/v8/src/v8utils.h b/deps/v8/src/v8utils.h
index 498e23dc7b..aada521e4c 100644
--- a/deps/v8/src/v8utils.h
+++ b/deps/v8/src/v8utils.h
@@ -188,6 +188,9 @@ class AsciiStringAdapter: public v8::String::ExternalAsciiStringResource {
 Vector<const char> ReadFile(const char* filename,
                             bool* exists,
                             bool verbose = true);
+Vector<const char> ReadFile(FILE* file,
+                            bool* exists,
+                            bool verbose = true);
 
 
 
diff --git a/deps/v8/src/version.cc b/deps/v8/src/version.cc
index f744d4e1d6..ee5411d888 100644
--- a/deps/v8/src/version.cc
+++ b/deps/v8/src/version.cc
@@ -34,8 +34,8 @@
 // cannot be changed without changing the SCons build script.
 #define MAJOR_VERSION     3
 #define MINOR_VERSION     4
-#define BUILD_NUMBER      10
-#define PATCH_LEVEL       0
+#define BUILD_NUMBER      12
+#define PATCH_LEVEL       1
 // Use 1 for candidates and 0 otherwise.
 // (Boolean macro values are not supported by all preprocessors.)
 #define IS_CANDIDATE_VERSION 0
diff --git a/deps/v8/src/vm-state-inl.h b/deps/v8/src/vm-state-inl.h
index 1f363de626..c647e56c97 100644
--- a/deps/v8/src/vm-state-inl.h
+++ b/deps/v8/src/vm-state-inl.h
@@ -39,7 +39,6 @@ namespace internal {
 // logger and partially threaded through the call stack.  States are pushed by
 // VMState construction and popped by destruction.
 //
-#ifdef ENABLE_VMSTATE_TRACKING
 inline const char* StateToString(StateTag state) {
   switch (state) {
     case JS:
@@ -61,32 +60,16 @@ inline const char* StateToString(StateTag state) {
 
 VMState::VMState(Isolate* isolate, StateTag tag)
     : isolate_(isolate), previous_tag_(isolate->current_vm_state()) {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   if (FLAG_log_state_changes) {
     LOG(isolate, UncheckedStringEvent("Entering", StateToString(tag)));
     LOG(isolate, UncheckedStringEvent("From", StateToString(previous_tag_)));
   }
-#endif
 
   isolate_->SetCurrentVMState(tag);
-
-#ifdef ENABLE_HEAP_PROTECTION
-  if (FLAG_protect_heap) {
-    if (tag == EXTERNAL) {
-      // We are leaving V8.
-      ASSERT(previous_tag_ != EXTERNAL);
-      isolate_->heap()->Protect();
-    } else if (previous_tag_ = EXTERNAL) {
-      // We are entering V8.
-      isolate_->heap()->Unprotect();
-    }
-  }
-#endif
 }
 
 
 VMState::~VMState() {
-#ifdef ENABLE_LOGGING_AND_PROFILING
   if (FLAG_log_state_changes) {
     LOG(isolate_,
         UncheckedStringEvent("Leaving",
@@ -94,32 +77,10 @@ VMState::~VMState() {
     LOG(isolate_,
         UncheckedStringEvent("To", StateToString(previous_tag_)));
   }
-#endif  // ENABLE_LOGGING_AND_PROFILING
-
-#ifdef ENABLE_HEAP_PROTECTION
-  StateTag tag = isolate_->current_vm_state();
-#endif
 
   isolate_->SetCurrentVMState(previous_tag_);
-
-#ifdef ENABLE_HEAP_PROTECTION
-  if (FLAG_protect_heap) {
-    if (tag == EXTERNAL) {
-      // We are reentering V8.
-      ASSERT(previous_tag_ != EXTERNAL);
-      isolate_->heap()->Unprotect();
-    } else if (previous_tag_ == EXTERNAL) {
-      // We are leaving V8.
-      isolate_->heap()->Protect();
-    }
-  }
-#endif  // ENABLE_HEAP_PROTECTION
 }
 
-#endif  // ENABLE_VMSTATE_TRACKING
-
-
-#ifdef ENABLE_LOGGING_AND_PROFILING
 
 ExternalCallbackScope::ExternalCallbackScope(Isolate* isolate, Address callback)
     : isolate_(isolate), previous_callback_(isolate->external_callback()) {
@@ -130,8 +91,6 @@ ExternalCallbackScope::~ExternalCallbackScope() {
   isolate_->set_external_callback(previous_callback_);
 }
 
-#endif  // ENABLE_LOGGING_AND_PROFILING
-
 
 } }  // namespace v8::internal
 
diff --git a/deps/v8/src/vm-state.h b/deps/v8/src/vm-state.h
index 2062340f9b..831e2d396b 100644
--- a/deps/v8/src/vm-state.h
+++ b/deps/v8/src/vm-state.h
@@ -35,7 +35,6 @@ namespace v8 {
 namespace internal {
 
 class VMState BASE_EMBEDDED {
-#ifdef ENABLE_VMSTATE_TRACKING
  public:
   inline VMState(Isolate* isolate, StateTag tag);
   inline ~VMState();
@@ -43,26 +42,16 @@ class VMState BASE_EMBEDDED {
  private:
   Isolate* isolate_;
   StateTag previous_tag_;
-
-#else
- public:
-  VMState(Isolate* isolate, StateTag state) {}
-#endif
 };
 
 
 class ExternalCallbackScope BASE_EMBEDDED {
-#ifdef ENABLE_LOGGING_AND_PROFILING
  public:
   inline ExternalCallbackScope(Isolate* isolate, Address callback);
   inline ~ExternalCallbackScope();
  private:
   Isolate* isolate_;
   Address previous_callback_;
-#else
- public:
-  ExternalCallbackScope(Isolate* isolate, Address callback) {}
-#endif
 };
 
 } }  // namespace v8::internal
diff --git a/deps/v8/src/x64/code-stubs-x64.cc b/deps/v8/src/x64/code-stubs-x64.cc
index 2f40251841..3cf7840d54 100644
--- a/deps/v8/src/x64/code-stubs-x64.cc
+++ b/deps/v8/src/x64/code-stubs-x64.cc
@@ -642,25 +642,17 @@ void UnaryOpStub::GenerateGenericCodeFallback(MacroAssembler* masm) {
 }
 
 
-const char* UnaryOpStub::GetName() {
-  if (name_ != NULL) return name_;
-  const int kMaxNameLength = 100;
-  name_ = Isolate::Current()->bootstrapper()->AllocateAutoDeletedArray(
-      kMaxNameLength);
-  if (name_ == NULL) return "OOM";
+void UnaryOpStub::PrintName(StringStream* stream) {
   const char* op_name = Token::Name(op_);
   const char* overwrite_name = NULL;  // Make g++ happy.
   switch (mode_) {
     case UNARY_NO_OVERWRITE: overwrite_name = "Alloc"; break;
     case UNARY_OVERWRITE: overwrite_name = "Overwrite"; break;
   }
-
-  OS::SNPrintF(Vector<char>(name_, kMaxNameLength),
-               "UnaryOpStub_%s_%s_%s",
-               op_name,
-               overwrite_name,
-               UnaryOpIC::GetName(operand_type_));
-  return name_;
+  stream->Add("UnaryOpStub_%s_%s_%s",
+              op_name,
+              overwrite_name,
+              UnaryOpIC::GetName(operand_type_));
 }
 
 
@@ -721,12 +713,7 @@ void BinaryOpStub::Generate(MacroAssembler* masm) {
 }
 
 
-const char* BinaryOpStub::GetName() {
-  if (name_ != NULL) return name_;
-  const int kMaxNameLength = 100;
-  name_ = Isolate::Current()->bootstrapper()->AllocateAutoDeletedArray(
-      kMaxNameLength);
-  if (name_ == NULL) return "OOM";
+void BinaryOpStub::PrintName(StringStream* stream) {
   const char* op_name = Token::Name(op_);
   const char* overwrite_name;
   switch (mode_) {
@@ -735,13 +722,10 @@ const char* BinaryOpStub::GetName() {
     case OVERWRITE_LEFT: overwrite_name = "OverwriteLeft"; break;
     default: overwrite_name = "UnknownOverwrite"; break;
   }
-
-  OS::SNPrintF(Vector<char>(name_, kMaxNameLength),
-               "BinaryOpStub_%s_%s_%s",
-               op_name,
-               overwrite_name,
-               BinaryOpIC::GetName(operands_type_));
-  return name_;
+  stream->Add("BinaryOpStub_%s_%s_%s",
+              op_name,
+              overwrite_name,
+              BinaryOpIC::GetName(operands_type_));
 }
 
 
@@ -3450,9 +3434,7 @@ void CEntryStub::Generate(MacroAssembler* masm) {
 
 void JSEntryStub::GenerateBody(MacroAssembler* masm, bool is_construct) {
   Label invoke, exit;
-#ifdef ENABLE_LOGGING_AND_PROFILING
   Label not_outermost_js, not_outermost_js_2;
-#endif
   {  // NOLINT. Scope block confuses linter.
     MacroAssembler::NoRootArrayScope uninitialized_root_register(masm);
     // Setup frame.
@@ -3497,7 +3479,6 @@ void JSEntryStub::GenerateBody(MacroAssembler* masm, bool is_construct) {
     __ push(c_entry_fp_operand);
   }
 
-#ifdef ENABLE_LOGGING_AND_PROFILING
   // If this is the outermost JS call, set js_entry_sp value.
   ExternalReference js_entry_sp(Isolate::k_js_entry_sp_address, isolate);
   __ Load(rax, js_entry_sp);
@@ -3511,7 +3492,6 @@ void JSEntryStub::GenerateBody(MacroAssembler* masm, bool is_construct) {
   __ bind(&not_outermost_js);
   __ Push(Smi::FromInt(StackFrame::INNER_JSENTRY_FRAME));
   __ bind(&cont);
-#endif
 
   // Call a faked try-block that does the invoke.
   __ call(&invoke);
@@ -3555,7 +3535,6 @@ void JSEntryStub::GenerateBody(MacroAssembler* masm, bool is_construct) {
   __ PopTryHandler();
 
   __ bind(&exit);
-#ifdef ENABLE_LOGGING_AND_PROFILING
   // Check if the current stack frame is marked as the outermost JS frame.
   __ pop(rbx);
   __ Cmp(rbx, Smi::FromInt(StackFrame::OUTERMOST_JSENTRY_FRAME));
@@ -3563,7 +3542,6 @@ void JSEntryStub::GenerateBody(MacroAssembler* masm, bool is_construct) {
   __ movq(kScratchRegister, js_entry_sp);
   __ movq(Operand(kScratchRegister, 0), Immediate(0));
   __ bind(&not_outermost_js_2);
-#endif
 
   // Restore the top frame descriptor from the stack.
   { Operand c_entry_fp_operand = masm->ExternalOperand(c_entry_fp);
@@ -3772,15 +3750,8 @@ int CompareStub::MinorKey() {
 
 // Unfortunately you have to run without snapshots to see most of these
 // names in the profile since most compare stubs end up in the snapshot.
-const char* CompareStub::GetName() {
+void CompareStub::PrintName(StringStream* stream) {
   ASSERT(lhs_.is(no_reg) && rhs_.is(no_reg));
-
-  if (name_ != NULL) return name_;
-  const int kMaxNameLength = 100;
-  name_ = Isolate::Current()->bootstrapper()->AllocateAutoDeletedArray(
-      kMaxNameLength);
-  if (name_ == NULL) return "OOM";
-
   const char* cc_name;
   switch (cc_) {
     case less: cc_name = "LT"; break;
@@ -3791,35 +3762,12 @@ const char* CompareStub::GetName() {
     case not_equal: cc_name = "NE"; break;
     default: cc_name = "UnknownCondition"; break;
   }
-
-  const char* strict_name = "";
-  if (strict_ && (cc_ == equal || cc_ == not_equal)) {
-    strict_name = "_STRICT";
-  }
-
-  const char* never_nan_nan_name = "";
-  if (never_nan_nan_ && (cc_ == equal || cc_ == not_equal)) {
-    never_nan_nan_name = "_NO_NAN";
-  }
-
-  const char* include_number_compare_name = "";
-  if (!include_number_compare_) {
-    include_number_compare_name = "_NO_NUMBER";
-  }
-
-  const char* include_smi_compare_name = "";
-  if (!include_smi_compare_) {
-    include_smi_compare_name = "_NO_SMI";
-  }
-
-  OS::SNPrintF(Vector<char>(name_, kMaxNameLength),
-               "CompareStub_%s%s%s%s",
-               cc_name,
-               strict_name,
-               never_nan_nan_name,
-               include_number_compare_name,
-               include_smi_compare_name);
-  return name_;
+  bool is_equality = cc_ == equal || cc_ == not_equal;
+  stream->Add("CompareStub_%s", cc_name);
+  if (strict_ && is_equality) stream->Add("_STRICT");
+  if (never_nan_nan_ && is_equality) stream->Add("_NO_NAN");
+  if (!include_number_compare_) stream->Add("_NO_NUMBER");
+  if (!include_smi_compare_) stream->Add("_NO_SMI");
 }
 
 
diff --git a/deps/v8/src/x64/code-stubs-x64.h b/deps/v8/src/x64/code-stubs-x64.h
index 6a07b3b84d..4058118eef 100644
--- a/deps/v8/src/x64/code-stubs-x64.h
+++ b/deps/v8/src/x64/code-stubs-x64.h
@@ -66,8 +66,7 @@ class UnaryOpStub: public CodeStub {
               UnaryOpIC::TypeInfo operand_type = UnaryOpIC::UNINITIALIZED)
       : op_(op),
         mode_(mode),
-        operand_type_(operand_type),
-        name_(NULL) {
+        operand_type_(operand_type) {
   }
 
  private:
@@ -77,19 +76,7 @@ class UnaryOpStub: public CodeStub {
   // Operand type information determined at runtime.
   UnaryOpIC::TypeInfo operand_type_;
 
-  char* name_;
-
-  const char* GetName();
-
-#ifdef DEBUG
-  void Print() {
-    PrintF("UnaryOpStub %d (op %s), (mode %d, runtime_type_info %s)\n",
-           MinorKey(),
-           Token::String(op_),
-           static_cast<int>(mode_),
-           UnaryOpIC::GetName(operand_type_));
-  }
-#endif
+  virtual void PrintName(StringStream* stream);
 
   class ModeBits: public BitField<UnaryOverwriteMode, 0, 1> {};
   class OpBits: public BitField<Token::Value, 1, 7> {};
@@ -149,8 +136,7 @@ class BinaryOpStub: public CodeStub {
       : op_(op),
         mode_(mode),
         operands_type_(BinaryOpIC::UNINITIALIZED),
-        result_type_(BinaryOpIC::UNINITIALIZED),
-        name_(NULL) {
+        result_type_(BinaryOpIC::UNINITIALIZED) {
     ASSERT(OpBits::is_valid(Token::NUM_TOKENS));
   }
 
@@ -161,8 +147,7 @@ class BinaryOpStub: public CodeStub {
       : op_(OpBits::decode(key)),
         mode_(ModeBits::decode(key)),
         operands_type_(operands_type),
-        result_type_(result_type),
-        name_(NULL) { }
+        result_type_(result_type) { }
 
  private:
   enum SmiCodeGenerateHeapNumberResults {
@@ -177,20 +162,7 @@ class BinaryOpStub: public CodeStub {
   BinaryOpIC::TypeInfo operands_type_;
   BinaryOpIC::TypeInfo result_type_;
 
-  char* name_;
-
-  const char* GetName();
-
-#ifdef DEBUG
-  void Print() {
-    PrintF("BinaryOpStub %d (op %s), "
-           "(mode %d, runtime_type_info %s)\n",
-           MinorKey(),
-           Token::String(op_),
-           static_cast<int>(mode_),
-           BinaryOpIC::GetName(operands_type_));
-  }
-#endif
+  virtual void PrintName(StringStream* stream);
 
   // Minor key encoding in 15 bits RRRTTTOOOOOOOMM.
   class ModeBits: public BitField<OverwriteMode, 0, 2> {};
@@ -410,14 +382,6 @@ class NumberToStringStub: public CodeStub {
   int MinorKey() { return 0; }
 
   void Generate(MacroAssembler* masm);
-
-  const char* GetName() { return "NumberToStringStub"; }
-
-#ifdef DEBUG
-  void Print() {
-    PrintF("NumberToStringStub\n");
-  }
-#endif
 };
 
 
@@ -461,13 +425,6 @@ class StringDictionaryLookupStub: public CodeStub {
       StringDictionary::kHeaderSize +
       StringDictionary::kElementsStartIndex * kPointerSize;
 
-
-#ifdef DEBUG
-  void Print() {
-    PrintF("StringDictionaryLookupStub\n");
-  }
-#endif
-
   Major MajorKey() { return StringDictionaryNegativeLookup; }
 
   int MinorKey() {
diff --git a/deps/v8/src/x64/codegen-x64.h b/deps/v8/src/x64/codegen-x64.h
index 94c7850289..a0648cec64 100644
--- a/deps/v8/src/x64/codegen-x64.h
+++ b/deps/v8/src/x64/codegen-x64.h
@@ -58,9 +58,7 @@ class CodeGenerator: public AstVisitor {
   // Print the code after compiling it.
   static void PrintCode(Handle<Code> code, CompilationInfo* info);
 
-#ifdef ENABLE_LOGGING_AND_PROFILING
   static bool ShouldGenerateLog(Expression* type);
-#endif
 
   static bool RecordPositions(MacroAssembler* masm,
                               int pos,
diff --git a/deps/v8/src/x64/full-codegen-x64.cc b/deps/v8/src/x64/full-codegen-x64.cc
index 6629927675..a54bff59bd 100644
--- a/deps/v8/src/x64/full-codegen-x64.cc
+++ b/deps/v8/src/x64/full-codegen-x64.cc
@@ -741,7 +741,7 @@ void FullCodeGenerator::EmitDeclaration(Variable* variable,
       // IDs for bailouts from optimized code.
       ASSERT(prop->obj()->AsVariableProxy() != NULL);
       { AccumulatorValueContext for_object(this);
-        EmitVariableLoad(prop->obj()->AsVariableProxy()->var());
+        EmitVariableLoad(prop->obj()->AsVariableProxy());
       }
       __ push(rax);
       VisitForAccumulatorValue(function);
@@ -1071,7 +1071,7 @@ void FullCodeGenerator::EmitNewClosure(Handle<SharedFunctionInfo> info,
 
 void FullCodeGenerator::VisitVariableProxy(VariableProxy* expr) {
   Comment cmnt(masm_, "[ VariableProxy");
-  EmitVariableLoad(expr->var());
+  EmitVariableLoad(expr);
 }
 
 
@@ -1222,7 +1222,11 @@ void FullCodeGenerator::EmitDynamicLoadFromSlotFastCase(
 }
 
 
-void FullCodeGenerator::EmitVariableLoad(Variable* var) {
+void FullCodeGenerator::EmitVariableLoad(VariableProxy* proxy) {
+  // Record position before possible IC call.
+  SetSourcePosition(proxy->position());
+  Variable* var = proxy->var();
+
   // Three cases: non-this global variables, lookup slots, and all other
   // types of slots.
   Slot* slot = var->AsSlot();
@@ -1548,7 +1552,7 @@ void FullCodeGenerator::VisitAssignment(Assignment* expr) {
     { AccumulatorValueContext context(this);
       switch (assign_type) {
         case VARIABLE:
-          EmitVariableLoad(expr->target()->AsVariableProxy()->var());
+          EmitVariableLoad(expr->target()->AsVariableProxy());
           PrepareForBailout(expr->target(), TOS_REG);
           break;
         case NAMED_PROPERTY:
@@ -2664,13 +2668,11 @@ void FullCodeGenerator::EmitLog(ZoneList<Expression*>* args) {
   //     with '%2s' (see Logger::LogRuntime for all the formats).
   //   2 (array): Arguments to the format string.
   ASSERT_EQ(args->length(), 3);
-#ifdef ENABLE_LOGGING_AND_PROFILING
   if (CodeGenerator::ShouldGenerateLog(args->at(0))) {
     VisitForStackValue(args->at(1));
     VisitForStackValue(args->at(2));
     __ CallRuntime(Runtime::kLog, 2);
   }
-#endif
   // Finally, we're expected to leave a value on the top of the stack.
   __ LoadRoot(rax, Heap::kUndefinedValueRootIndex);
   context()->Plug(rax);
@@ -3746,7 +3748,7 @@ void FullCodeGenerator::VisitCountOperation(CountOperation* expr) {
   if (assign_type == VARIABLE) {
     ASSERT(expr->expression()->AsVariableProxy()->var() != NULL);
     AccumulatorValueContext context(this);
-    EmitVariableLoad(expr->expression()->AsVariableProxy()->var());
+    EmitVariableLoad(expr->expression()->AsVariableProxy());
   } else {
     // Reserve space for result of postfix operation.
     if (expr->is_postfix() && !context()->IsEffect()) {
diff --git a/deps/v8/src/x64/ic-x64.cc b/deps/v8/src/x64/ic-x64.cc
index 342f672e64..339d2c19ce 100644
--- a/deps/v8/src/x64/ic-x64.cc
+++ b/deps/v8/src/x64/ic-x64.cc
@@ -225,110 +225,6 @@ static void GenerateDictionaryStore(MacroAssembler* masm,
 }
 
 
-static void GenerateNumberDictionaryLoad(MacroAssembler* masm,
-                                         Label* miss,
-                                         Register elements,
-                                         Register key,
-                                         Register r0,
-                                         Register r1,
-                                         Register r2,
-                                         Register result) {
-  // Register use:
-  //
-  // elements - holds the slow-case elements of the receiver on entry.
-  //            Unchanged unless 'result' is the same register.
-  //
-  // key      - holds the smi key on entry.
-  //            Unchanged unless 'result' is the same register.
-  //
-  // Scratch registers:
-  //
-  // r0 - holds the untagged key on entry and holds the hash once computed.
-  //
-  // r1 - used to hold the capacity mask of the dictionary
-  //
-  // r2 - used for the index into the dictionary.
-  //
-  // result - holds the result on exit if the load succeeded.
-  //          Allowed to be the same as 'key' or 'result'.
-  //          Unchanged on bailout so 'key' or 'result' can be used
-  //          in further computation.
-
-  Label done;
-
-  // Compute the hash code from the untagged key.  This must be kept in sync
-  // with ComputeIntegerHash in utils.h.
-  //
-  // hash = ~hash + (hash << 15);
-  __ movl(r1, r0);
-  __ notl(r0);
-  __ shll(r1, Immediate(15));
-  __ addl(r0, r1);
-  // hash = hash ^ (hash >> 12);
-  __ movl(r1, r0);
-  __ shrl(r1, Immediate(12));
-  __ xorl(r0, r1);
-  // hash = hash + (hash << 2);
-  __ leal(r0, Operand(r0, r0, times_4, 0));
-  // hash = hash ^ (hash >> 4);
-  __ movl(r1, r0);
-  __ shrl(r1, Immediate(4));
-  __ xorl(r0, r1);
-  // hash = hash * 2057;
-  __ imull(r0, r0, Immediate(2057));
-  // hash = hash ^ (hash >> 16);
-  __ movl(r1, r0);
-  __ shrl(r1, Immediate(16));
-  __ xorl(r0, r1);
-
-  // Compute capacity mask.
-  __ SmiToInteger32(r1,
-                    FieldOperand(elements, NumberDictionary::kCapacityOffset));
-  __ decl(r1);
-
-  // Generate an unrolled loop that performs a few probes before giving up.
-  const int kProbes = 4;
-  for (int i = 0; i < kProbes; i++) {
-    // Use r2 for index calculations and keep the hash intact in r0.
-    __ movq(r2, r0);
-    // Compute the masked index: (hash + i + i * i) & mask.
-    if (i > 0) {
-      __ addl(r2, Immediate(NumberDictionary::GetProbeOffset(i)));
-    }
-    __ and_(r2, r1);
-
-    // Scale the index by multiplying by the entry size.
-    ASSERT(NumberDictionary::kEntrySize == 3);
-    __ lea(r2, Operand(r2, r2, times_2, 0));  // r2 = r2 * 3
-
-    // Check if the key matches.
-    __ cmpq(key, FieldOperand(elements,
-                              r2,
-                              times_pointer_size,
-                              NumberDictionary::kElementsStartOffset));
-    if (i != (kProbes - 1)) {
-      __ j(equal, &done);
-    } else {
-      __ j(not_equal, miss);
-    }
-  }
-
-  __ bind(&done);
-  // Check that the value is a normal propety.
-  const int kDetailsOffset =
-      NumberDictionary::kElementsStartOffset + 2 * kPointerSize;
-  ASSERT_EQ(NORMAL, 0);
-  __ Test(FieldOperand(elements, r2, times_pointer_size, kDetailsOffset),
-          Smi::FromInt(PropertyDetails::TypeField::mask()));
-  __ j(not_zero, miss);
-
-  // Get the value at the masked, scaled index.
-  const int kValueOffset =
-      NumberDictionary::kElementsStartOffset + kPointerSize;
-  __ movq(result, FieldOperand(elements, r2, times_pointer_size, kValueOffset));
-}
-
-
 void LoadIC::GenerateArrayLength(MacroAssembler* masm) {
   // ----------- S t a t e -------------
   //  -- rax    : receiver
@@ -535,7 +431,7 @@ void KeyedLoadIC::GenerateGeneric(MacroAssembler* masm) {
   __ CompareRoot(FieldOperand(rcx, HeapObject::kMapOffset),
                  Heap::kHashTableMapRootIndex);
   __ j(not_equal, &slow);
-  GenerateNumberDictionaryLoad(masm, &slow, rcx, rax, rbx, r9, rdi, rax);
+  __ LoadFromNumberDictionary(&slow, rcx, rax, rbx, r9, rdi, rax);
   __ ret(0);
 
   __ bind(&slow);
@@ -1099,7 +995,7 @@ void KeyedCallIC::GenerateMegamorphic(MacroAssembler* masm, int argc) {
   __ j(not_equal, &slow_load);
   __ SmiToInteger32(rbx, rcx);
   // ebx: untagged index
-  GenerateNumberDictionaryLoad(masm, &slow_load, rax, rcx, rbx, r9, rdi, rdi);
+  __ LoadFromNumberDictionary(&slow_load, rax, rcx, rbx, r9, rdi, rdi);
   __ IncrementCounter(counters->keyed_call_generic_smi_dict(), 1);
   __ jmp(&do_call);
 
diff --git a/deps/v8/src/x64/lithium-codegen-x64.cc b/deps/v8/src/x64/lithium-codegen-x64.cc
index 3ebdc7cee7..98667ce87e 100644
--- a/deps/v8/src/x64/lithium-codegen-x64.cc
+++ b/deps/v8/src/x64/lithium-codegen-x64.cc
@@ -1341,6 +1341,7 @@ void LCodeGen::DoArithmeticT(LArithmeticT* instr) {
 
   BinaryOpStub stub(instr->op(), NO_OVERWRITE);
   CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr);
+  __ nop();  // Signals no inlined code.
 }
 
 
diff --git a/deps/v8/src/x64/macro-assembler-x64.cc b/deps/v8/src/x64/macro-assembler-x64.cc
index dbed6e0fda..1df0228434 100644
--- a/deps/v8/src/x64/macro-assembler-x64.cc
+++ b/deps/v8/src/x64/macro-assembler-x64.cc
@@ -3204,6 +3204,109 @@ void MacroAssembler::CheckAccessGlobalProxy(Register holder_reg,
 }
 
 
+void MacroAssembler::LoadFromNumberDictionary(Label* miss,
+                                              Register elements,
+                                              Register key,
+                                              Register r0,
+                                              Register r1,
+                                              Register r2,
+                                              Register result) {
+  // Register use:
+  //
+  // elements - holds the slow-case elements of the receiver on entry.
+  //            Unchanged unless 'result' is the same register.
+  //
+  // key      - holds the smi key on entry.
+  //            Unchanged unless 'result' is the same register.
+  //
+  // Scratch registers:
+  //
+  // r0 - holds the untagged key on entry and holds the hash once computed.
+  //
+  // r1 - used to hold the capacity mask of the dictionary
+  //
+  // r2 - used for the index into the dictionary.
+  //
+  // result - holds the result on exit if the load succeeded.
+  //          Allowed to be the same as 'key' or 'result'.
+  //          Unchanged on bailout so 'key' or 'result' can be used
+  //          in further computation.
+
+  Label done;
+
+  // Compute the hash code from the untagged key.  This must be kept in sync
+  // with ComputeIntegerHash in utils.h.
+  //
+  // hash = ~hash + (hash << 15);
+  movl(r1, r0);
+  notl(r0);
+  shll(r1, Immediate(15));
+  addl(r0, r1);
+  // hash = hash ^ (hash >> 12);
+  movl(r1, r0);
+  shrl(r1, Immediate(12));
+  xorl(r0, r1);
+  // hash = hash + (hash << 2);
+  leal(r0, Operand(r0, r0, times_4, 0));
+  // hash = hash ^ (hash >> 4);
+  movl(r1, r0);
+  shrl(r1, Immediate(4));
+  xorl(r0, r1);
+  // hash = hash * 2057;
+  imull(r0, r0, Immediate(2057));
+  // hash = hash ^ (hash >> 16);
+  movl(r1, r0);
+  shrl(r1, Immediate(16));
+  xorl(r0, r1);
+
+  // Compute capacity mask.
+  SmiToInteger32(r1,
+                 FieldOperand(elements, NumberDictionary::kCapacityOffset));
+  decl(r1);
+
+  // Generate an unrolled loop that performs a few probes before giving up.
+  const int kProbes = 4;
+  for (int i = 0; i < kProbes; i++) {
+    // Use r2 for index calculations and keep the hash intact in r0.
+    movq(r2, r0);
+    // Compute the masked index: (hash + i + i * i) & mask.
+    if (i > 0) {
+      addl(r2, Immediate(NumberDictionary::GetProbeOffset(i)));
+    }
+    and_(r2, r1);
+
+    // Scale the index by multiplying by the entry size.
+    ASSERT(NumberDictionary::kEntrySize == 3);
+    lea(r2, Operand(r2, r2, times_2, 0));  // r2 = r2 * 3
+
+    // Check if the key matches.
+    cmpq(key, FieldOperand(elements,
+                           r2,
+                           times_pointer_size,
+                           NumberDictionary::kElementsStartOffset));
+    if (i != (kProbes - 1)) {
+      j(equal, &done);
+    } else {
+      j(not_equal, miss);
+    }
+  }
+
+  bind(&done);
+  // Check that the value is a normal propety.
+  const int kDetailsOffset =
+      NumberDictionary::kElementsStartOffset + 2 * kPointerSize;
+  ASSERT_EQ(NORMAL, 0);
+  Test(FieldOperand(elements, r2, times_pointer_size, kDetailsOffset),
+       Smi::FromInt(PropertyDetails::TypeField::mask()));
+  j(not_zero, miss);
+
+  // Get the value at the masked, scaled index.
+  const int kValueOffset =
+      NumberDictionary::kElementsStartOffset + kPointerSize;
+  movq(result, FieldOperand(elements, r2, times_pointer_size, kValueOffset));
+}
+
+
 void MacroAssembler::LoadAllocationTopHelper(Register result,
                                              Register scratch,
                                              AllocationFlags flags) {
diff --git a/deps/v8/src/x64/macro-assembler-x64.h b/deps/v8/src/x64/macro-assembler-x64.h
index f09fafc202..47ce01bd0c 100644
--- a/deps/v8/src/x64/macro-assembler-x64.h
+++ b/deps/v8/src/x64/macro-assembler-x64.h
@@ -846,6 +846,15 @@ class MacroAssembler: public Assembler {
                               Label* miss);
 
 
+  void LoadFromNumberDictionary(Label* miss,
+                                Register elements,
+                                Register key,
+                                Register r0,
+                                Register r1,
+                                Register r2,
+                                Register result);
+
+
   // ---------------------------------------------------------------------------
   // Allocation support
 
diff --git a/deps/v8/src/x64/regexp-macro-assembler-x64.h b/deps/v8/src/x64/regexp-macro-assembler-x64.h
index 02b510fa07..7102225e64 100644
--- a/deps/v8/src/x64/regexp-macro-assembler-x64.h
+++ b/deps/v8/src/x64/regexp-macro-assembler-x64.h
@@ -28,6 +28,12 @@
 #ifndef V8_X64_REGEXP_MACRO_ASSEMBLER_X64_H_
 #define V8_X64_REGEXP_MACRO_ASSEMBLER_X64_H_
 
+#include "x64/assembler-x64.h"
+#include "x64/assembler-x64-inl.h"
+#include "macro-assembler.h"
+#include "code.h"
+#include "x64/macro-assembler-x64.h"
+
 namespace v8 {
 namespace internal {
 
diff --git a/deps/v8/src/x64/stub-cache-x64.cc b/deps/v8/src/x64/stub-cache-x64.cc
index da27fdf050..71ce856169 100644
--- a/deps/v8/src/x64/stub-cache-x64.cc
+++ b/deps/v8/src/x64/stub-cache-x64.cc
@@ -2538,7 +2538,10 @@ MaybeObject* KeyedStoreStubCompiler::CompileStoreElement(Map* receiver_map) {
   //  -- rsp[0] : return address
   // -----------------------------------
   Code* stub;
-  MaybeObject* maybe_stub = ComputeSharedKeyedStoreElementStub(receiver_map);
+  JSObject::ElementsKind elements_kind = receiver_map->elements_kind();
+  bool is_js_array = receiver_map->instance_type() == JS_ARRAY_TYPE;
+  MaybeObject* maybe_stub =
+      KeyedStoreElementStub(is_js_array, elements_kind).TryGetCode();
   if (!maybe_stub->To(&stub)) return maybe_stub;
   __ DispatchMap(rdx,
                  Handle<Map>(receiver_map),
@@ -2994,7 +2997,8 @@ MaybeObject* KeyedLoadStubCompiler::CompileLoadElement(Map* receiver_map) {
   //  -- rsp[0] : return address
   // -----------------------------------
   Code* stub;
-  MaybeObject* maybe_stub = ComputeSharedKeyedLoadElementStub(receiver_map);
+  JSObject::ElementsKind elements_kind = receiver_map->elements_kind();
+  MaybeObject* maybe_stub = KeyedLoadElementStub(elements_kind).TryGetCode();
   if (!maybe_stub->To(&stub)) return maybe_stub;
   __ DispatchMap(rdx,
                  Handle<Map>(receiver_map),
@@ -3177,6 +3181,51 @@ MaybeObject* ConstructStubCompiler::CompileConstructStub(JSFunction* function) {
 #define __ ACCESS_MASM(masm)
 
 
+void KeyedLoadStubCompiler::GenerateLoadDictionaryElement(
+    MacroAssembler* masm) {
+  // ----------- S t a t e -------------
+  //  -- rax    : key
+  //  -- rdx    : receiver
+  //  -- rsp[0] : return address
+  // -----------------------------------
+  Label slow, miss_force_generic;
+
+  // This stub is meant to be tail-jumped to, the receiver must already
+  // have been verified by the caller to not be a smi.
+
+  __ JumpIfNotSmi(rax, &miss_force_generic);
+  __ SmiToInteger32(rbx, rax);
+  __ movq(rcx, FieldOperand(rdx, JSObject::kElementsOffset));
+
+  // Check whether the elements is a number dictionary.
+  // rdx: receiver
+  // rax: key
+  // rbx: key as untagged int32
+  // rcx: elements
+  __ LoadFromNumberDictionary(&slow, rcx, rax, rbx, r9, rdi, rax);
+  __ ret(0);
+
+  __ bind(&slow);
+  // ----------- S t a t e -------------
+  //  -- rax    : key
+  //  -- rdx    : receiver
+  //  -- rsp[0]  : return address
+  // -----------------------------------
+  Handle<Code> slow_ic =
+      masm->isolate()->builtins()->KeyedLoadIC_Slow();
+  __ jmp(slow_ic, RelocInfo::CODE_TARGET);
+
+  __ bind(&miss_force_generic);
+  // ----------- S t a t e -------------
+  //  -- rax    : key
+  //  -- rdx    : receiver
+  //  -- rsp[0]  : return address
+  // -----------------------------------
+  Handle<Code> miss_ic =
+      masm->isolate()->builtins()->KeyedLoadIC_MissForceGeneric();
+  __ jmp(miss_ic, RelocInfo::CODE_TARGET);
+}
+
 void KeyedLoadStubCompiler::GenerateLoadExternalArray(
     MacroAssembler* masm,
     JSObject::ElementsKind elements_kind) {
diff --git a/deps/v8/src/zone.h b/deps/v8/src/zone.h
index a5e437f7fa..af9c916d70 100644
--- a/deps/v8/src/zone.h
+++ b/deps/v8/src/zone.h
@@ -164,7 +164,7 @@ class AssertNoZoneAllocation {
 class ZoneListAllocationPolicy {
  public:
   // Allocate 'size' bytes of memory in the zone.
-  INLINE(static void* New(int size));
+  static void* New(int size);
 
   // De-allocation attempts are silently ignored.
   static void Delete(void* p) { }