Upgrade V8 to 1.3.9

106 files changed, 4662 insertions, 997 deletions

diff --git a/deps/v8/ChangeLog b/deps/v8/ChangeLog
index d9d2b02ba..b07e7cc15 100644
--- a/deps/v8/ChangeLog
+++ b/deps/v8/ChangeLog
@@ -1,3 +1,30 @@
+2009-09-02: Version 1.3.9
+
+        Optimized stack guard checks on ARM.
+
+        Optimized API operations by inlining more in the API.
+
+        Optimized creation of objects from simple constructor functions.
+
+        Enabled a number of missing optimizations in the 64-bit port.
+
+        Implemented native-code support for regular expressions on ARM.
+
+        Stopped using the 'sahf' instruction on 64-bit machines that do
+        not support it.
+
+        Fixed a bug in the support for forceful termination of JavaScript
+        execution.
+
+
+2009-08-26: Version 1.3.8
+
+        Changed the handling of idle notifications to allow idle
+        notifications when V8 has not yet been initialized.
+
+        Fixed ARM simulator compilation problem on Windows.
+        
+
 2009-08-25: Version 1.3.7
 
         Reduced the size of generated code on ARM platforms by reducing
diff --git a/deps/v8/SConstruct b/deps/v8/SConstruct
index 5e9747c93..71673c0f0 100644
--- a/deps/v8/SConstruct
+++ b/deps/v8/SConstruct
@@ -99,12 +99,10 @@ LIBRARY_FLAGS = {
     'CPPDEFINES':   ['ENABLE_LOGGING_AND_PROFILING'],
     'CPPPATH': [join(root_dir, 'src')],
     'regexp:native': {
-      'arch:ia32' : {
         'CPPDEFINES': ['V8_NATIVE_REGEXP']
-      },
-      'arch:x64' : {
-        'CPPDEFINES': ['V8_NATIVE_REGEXP']
-      }
+    },
+    'mode:debug': {
+      'CPPDEFINES': ['V8_ENABLE_CHECKS']
     }
   },
   'gcc': {
@@ -178,17 +176,25 @@ LIBRARY_FLAGS = {
   },
   'msvc': {
     'all': {
-      'DIALECTFLAGS': ['/nologo'],
       'CCFLAGS':      ['$DIALECTFLAGS', '$WARNINGFLAGS'],
       'CXXFLAGS':     ['$CCFLAGS', '/GR-', '/Gy'],
-      'CPPDEFINES':   ['WIN32', '_USE_32BIT_TIME_T'],
-      'LINKFLAGS':    ['/NOLOGO', '/MACHINE:X86', '/INCREMENTAL:NO',
-          '/NXCOMPAT', '/IGNORE:4221'],
-      'ARFLAGS':      ['/NOLOGO'],
+      'CPPDEFINES':   ['WIN32'],
+      'LINKFLAGS':    ['/INCREMENTAL:NO', '/NXCOMPAT', '/IGNORE:4221'],
       'CCPDBFLAGS':   ['/Zi']
     },
+    'verbose:off': {
+      'DIALECTFLAGS': ['/nologo'],
+      'ARFLAGS':      ['/NOLOGO']
+    },
     'arch:ia32': {
-      'CPPDEFINES':   ['V8_TARGET_ARCH_IA32']
+      'CPPDEFINES':   ['V8_TARGET_ARCH_IA32', '_USE_32BIT_TIME_T'],
+      'LINKFLAGS':    ['/MACHINE:X86'],
+      'ARFLAGS':      ['/MACHINE:X86']
+    },
+    'arch:x64': {
+      'CPPDEFINES':   ['V8_TARGET_ARCH_X64'],
+      'LINKFLAGS':    ['/MACHINE:X64'],
+      'ARFLAGS':      ['/MACHINE:X64']
     },
     'mode:debug': {
       'CCFLAGS':      ['/Od', '/Gm'],
@@ -250,11 +256,13 @@ V8_EXTRA_FLAGS = {
   },
   'msvc': {
     'all': {
-      'WARNINGFLAGS': ['/W3', '/WX', '/wd4355', '/wd4800']
+      'WARNINGFLAGS': ['/WX', '/wd4355', '/wd4800']
     },
-    'library:shared': {
-      'CPPDEFINES':   ['BUILDING_V8_SHARED'],
-      'LIBS': ['winmm', 'ws2_32']
+    'arch:ia32': {
+      'WARNINGFLAGS': ['/W3']
+    },
+    'arch:x64': {
+      'WARNINGFLAGS': ['/W2']
     },
     'arch:arm': {
       'CPPDEFINES':   ['V8_TARGET_ARCH_ARM'],
@@ -352,7 +360,10 @@ CCTEST_EXTRA_FLAGS = {
     },
     'arch:ia32': {
       'CPPDEFINES': ['V8_TARGET_ARCH_IA32']
-    }
+    },
+    'arch:x64': {
+      'CPPDEFINES':   ['V8_TARGET_ARCH_X64']
+    },
   }
 }
 
@@ -417,10 +428,15 @@ SAMPLE_FLAGS = {
   },
   'msvc': {
     'all': {
-      'CCFLAGS': ['/nologo'],
-      'LINKFLAGS': ['/nologo'],
       'LIBS': ['winmm', 'ws2_32']
     },
+    'verbose:off': {
+      'CCFLAGS': ['/nologo'],
+      'LINKFLAGS': ['/NOLOGO']
+    },
+    'verbose:on': {
+      'LINKFLAGS': ['/VERBOSE']
+    },
     'library:shared': {
       'CPPDEFINES': ['USING_V8_SHARED']
     },
@@ -442,7 +458,12 @@ SAMPLE_FLAGS = {
       }
     },
     'arch:ia32': {
-      'CPPDEFINES':     ['V8_TARGET_ARCH_IA32']
+      'CPPDEFINES': ['V8_TARGET_ARCH_IA32'],
+      'LINKFLAGS': ['/MACHINE:X86']
+    },
+    'arch:x64': {
+      'CPPDEFINES': ['V8_TARGET_ARCH_X64'],
+      'LINKFLAGS': ['/MACHINE:X64']
     },
     'mode:debug': {
       'CCFLAGS':   ['/Od'],
@@ -585,6 +606,11 @@ SIMPLE_OPTIONS = {
     'values': ['dumb', 'readline'],
     'default': 'dumb',
     'help': 'the console to use for the d8 shell'
+  },
+  'verbose': {
+    'values': ['on', 'off'],
+    'default': 'off',
+    'help': 'more output from compiler and linker'
   }
 }
 
diff --git a/deps/v8/include/v8.h b/deps/v8/include/v8.h
index a40c068ed..346050d5d 100644
--- a/deps/v8/include/v8.h
+++ b/deps/v8/include/v8.h
@@ -127,6 +127,12 @@ class FunctionTemplate;
 class ObjectTemplate;
 class Data;
 
+namespace internal {
+
+class Object;
+
+}
+
 
 // --- W e a k  H a n d l e s
 
@@ -227,8 +233,8 @@ template <class T> class V8EXPORT_INLINE Handle {
    * The handles' references are not checked.
    */
   template <class S> bool operator==(Handle<S> that) const {
-    void** a = reinterpret_cast<void**>(**this);
-    void** b = reinterpret_cast<void**>(*that);
+    internal::Object** a = reinterpret_cast<internal::Object**>(**this);
+    internal::Object** b = reinterpret_cast<internal::Object**>(*that);
     if (a == 0) return b == 0;
     if (b == 0) return false;
     return *a == *b;
@@ -245,7 +251,11 @@ template <class T> class V8EXPORT_INLINE Handle {
   }
 
   template <class S> static inline Handle<T> Cast(Handle<S> that) {
+#ifdef V8_ENABLE_CHECKS
+    // If we're going to perform the type check then we have to check
+    // that the handle isn't empty before doing the checked cast.
     if (that.IsEmpty()) return Handle<T>();
+#endif
     return Handle<T>(T::Cast(*that));
   }
 
@@ -275,7 +285,11 @@ template <class T> class V8EXPORT_INLINE Local : public Handle<T> {
   }
   template <class S> inline Local(S* that) : Handle<T>(that) { }
   template <class S> static inline Local<T> Cast(Local<S> that) {
+#ifdef V8_ENABLE_CHECKS
+    // If we're going to perform the type check then we have to check
+    // that the handle isn't empty before doing the checked cast.
     if (that.IsEmpty()) return Local<T>();
+#endif
     return Local<T>(T::Cast(*that));
   }
 
@@ -344,7 +358,11 @@ template <class T> class V8EXPORT_INLINE Persistent : public Handle<T> {
       : Handle<T>(*that) { }
 
   template <class S> static inline Persistent<T> Cast(Persistent<S> that) {
+#ifdef V8_ENABLE_CHECKS
+    // If we're going to perform the type check then we have to check
+    // that the handle isn't empty before doing the checked cast.
     if (that.IsEmpty()) return Persistent<T>();
+#endif
     return Persistent<T>(T::Cast(*that));
   }
 
@@ -423,7 +441,7 @@ class V8EXPORT HandleScope {
   /**
    * Creates a new handle with the given value.
    */
-  static void** CreateHandle(void* value);
+  static internal::Object** CreateHandle(internal::Object* value);
 
  private:
   // Make it impossible to create heap-allocated or illegal handle
@@ -438,8 +456,8 @@ class V8EXPORT HandleScope {
   class V8EXPORT Data {
    public:
     int extensions;
-    void** next;
-    void** limit;
+    internal::Object** next;
+    internal::Object** limit;
     inline void Initialize() {
       extensions = -1;
       next = limit = NULL;
@@ -451,7 +469,7 @@ class V8EXPORT HandleScope {
   // Allow for the active closing of HandleScopes which allows to pass a handle
   // from the HandleScope being closed to the next top most HandleScope.
   bool is_closed_;
-  void** RawClose(void** value);
+  internal::Object** RawClose(internal::Object** value);
 
   friend class ImplementationUtilities;
 };
@@ -671,7 +689,7 @@ class V8EXPORT Value : public Data {
    * Returns true if this value is an instance of the String type.
    * See ECMA-262 8.4.
    */
-  bool IsString() const;
+  inline bool IsString() const;
 
   /**
    * Returns true if this value is a function.
@@ -737,6 +755,10 @@ class V8EXPORT Value : public Data {
   /** JS == */
   bool Equals(Handle<Value> that) const;
   bool StrictEquals(Handle<Value> that) const;
+  
+ private:
+  inline bool QuickIsString() const;
+  bool FullIsString() const;
 };
 
 
@@ -868,7 +890,7 @@ class V8EXPORT String : public Primitive {
    * Get the ExternalStringResource for an external string.  Returns
    * NULL if IsExternal() doesn't return true.
    */
-  ExternalStringResource* GetExternalStringResource() const;
+  inline ExternalStringResource* GetExternalStringResource() const;
 
   /**
    * Get the ExternalAsciiStringResource for an external ascii string.
@@ -876,7 +898,7 @@ class V8EXPORT String : public Primitive {
    */
   ExternalAsciiStringResource* GetExternalAsciiStringResource() const;
 
-  static String* Cast(v8::Value* obj);
+  static inline String* Cast(v8::Value* obj);
 
   /**
    * Allocates a new string from either utf-8 encoded or ascii data.
@@ -1010,6 +1032,10 @@ class V8EXPORT String : public Primitive {
     Value(const Value&);
     void operator=(const Value&);
   };
+  
+ private:
+  void VerifyExternalStringResource(ExternalStringResource* val) const;
+  static void CheckCast(v8::Value* obj);
 };
 
 
@@ -1020,9 +1046,10 @@ class V8EXPORT Number : public Primitive {
  public:
   double Value() const;
   static Local<Number> New(double value);
-  static Number* Cast(v8::Value* obj);
+  static inline Number* Cast(v8::Value* obj);
  private:
   Number();
+  static void CheckCast(v8::Value* obj);
 };
 
 
@@ -1033,9 +1060,10 @@ class V8EXPORT Integer : public Number {
  public:
   static Local<Integer> New(int32_t value);
   int64_t Value() const;
-  static Integer* Cast(v8::Value* obj);
+  static inline Integer* Cast(v8::Value* obj);
  private:
   Integer();
+  static void CheckCast(v8::Value* obj);
 };
 
 
@@ -1074,7 +1102,9 @@ class V8EXPORT Date : public Value {
    */
   double NumberValue() const;
 
-  static Date* Cast(v8::Value* obj);
+  static inline Date* Cast(v8::Value* obj);
+ private:
+  static void CheckCast(v8::Value* obj);
 };
 
 
@@ -1153,14 +1183,13 @@ class V8EXPORT Object : public Value {
   /** Gets the number of internal fields for this Object. */
   int InternalFieldCount();
   /** Gets the value in an internal field. */
-  Local<Value> GetInternalField(int index);
+  inline Local<Value> GetInternalField(int index);
   /** Sets the value in an internal field. */
   void SetInternalField(int index, Handle<Value> value);
 
-  // The two functions below do not perform index bounds checks and
-  // they do not check that the VM is still running. Use with caution.
   /** Gets a native pointer from an internal field. */
-  void* GetPointerFromInternalField(int index);
+  inline void* GetPointerFromInternalField(int index);
+  
   /** Sets a native pointer in an internal field. */
   void SetPointerInInternalField(int index, void* value);
 
@@ -1223,9 +1252,17 @@ class V8EXPORT Object : public Value {
   void SetIndexedPropertiesToPixelData(uint8_t* data, int length);
 
   static Local<Object> New();
-  static Object* Cast(Value* obj);
+  static inline Object* Cast(Value* obj);
  private:
   Object();
+  static void CheckCast(Value* obj);
+  Local<Value> CheckedGetInternalField(int index);
+
+  /**
+   * If quick access to the internal field is possible this method
+   * returns the value.  Otherwise an empty handle is returned. 
+   */
+  inline Local<Value> UncheckedGetInternalField(int index);
 };
 
 
@@ -1243,9 +1280,10 @@ class V8EXPORT Array : public Object {
   Local<Object> CloneElementAt(uint32_t index);
 
   static Local<Array> New(int length = 0);
-  static Array* Cast(Value* obj);
+  static inline Array* Cast(Value* obj);
  private:
   Array();
+  static void CheckCast(Value* obj);
 };
 
 
@@ -1259,9 +1297,10 @@ class V8EXPORT Function : public Object {
   Local<Value> Call(Handle<Object> recv, int argc, Handle<Value> argv[]);
   void SetName(Handle<String> name);
   Handle<Value> GetName() const;
-  static Function* Cast(Value* obj);
+  static inline Function* Cast(Value* obj);
  private:
   Function();
+  static void CheckCast(Value* obj);
 };
 
 
@@ -1279,13 +1318,16 @@ class V8EXPORT Function : public Object {
 class V8EXPORT External : public Value {
  public:
   static Local<Value> Wrap(void* data);
-  static void* Unwrap(Handle<Value> obj);
+  static inline void* Unwrap(Handle<Value> obj);
 
   static Local<External> New(void* value);
-  static External* Cast(Value* obj);
+  static inline External* Cast(Value* obj);
   void* Value() const;
  private:
   External();
+  static void CheckCast(v8::Value* obj);
+  static inline void* QuickUnwrap(Handle<v8::Value> obj);
+  static void* FullUnwrap(Handle<v8::Value> obj);
 };
 
 
@@ -2297,12 +2339,14 @@ class V8EXPORT V8 {
  private:
   V8();
 
-  static void** GlobalizeReference(void** handle);
-  static void DisposeGlobal(void** global_handle);
-  static void MakeWeak(void** global_handle, void* data, WeakReferenceCallback);
-  static void ClearWeak(void** global_handle);
-  static bool IsGlobalNearDeath(void** global_handle);
-  static bool IsGlobalWeak(void** global_handle);
+  static internal::Object** GlobalizeReference(internal::Object** handle);
+  static void DisposeGlobal(internal::Object** global_handle);
+  static void MakeWeak(internal::Object** global_handle,
+                       void* data,
+                       WeakReferenceCallback);
+  static void ClearWeak(internal::Object** global_handle);
+  static bool IsGlobalNearDeath(internal::Object** global_handle);
+  static bool IsGlobalWeak(internal::Object** global_handle);
 
   template <class T> friend class Handle;
   template <class T> friend class Local;
@@ -2641,6 +2685,76 @@ class V8EXPORT Locker {
 
 // --- I m p l e m e n t a t i o n ---
 
+
+namespace internal {
+
+
+// Tag information for HeapObject.
+const int kHeapObjectTag = 1;
+const int kHeapObjectTagSize = 2;
+const intptr_t kHeapObjectTagMask = (1 << kHeapObjectTagSize) - 1;
+
+
+// Tag information for Smi.
+const int kSmiTag = 0;
+const int kSmiTagSize = 1;
+const intptr_t kSmiTagMask = (1 << kSmiTagSize) - 1;
+
+
+/**
+ * This class exports constants and functionality from within v8 that
+ * is necessary to implement inline functions in the v8 api.  Don't
+ * depend on functions and constants defined here.
+ */
+class Internals {
+ public:
+
+  // These values match non-compiler-dependent values defined within
+  // the implementation of v8.
+  static const int kHeapObjectMapOffset = 0;
+  static const int kMapInstanceTypeOffset = sizeof(void*) + sizeof(int);
+  static const int kStringResourceOffset = 2 * sizeof(void*);
+  static const int kProxyProxyOffset = sizeof(void*);
+  static const int kJSObjectHeaderSize = 3 * sizeof(void*);
+  static const int kFullStringRepresentationMask = 0x07;
+  static const int kExternalTwoByteRepresentationTag = 0x03;
+  static const int kAlignedPointerShift = 2;
+
+  // These constants are compiler dependent so their values must be
+  // defined within the implementation.
+  static int kJSObjectType;
+  static int kFirstNonstringType;
+  static int kProxyType;
+
+  static inline bool HasHeapObjectTag(internal::Object* value) {
+    return ((reinterpret_cast<intptr_t>(value) & kHeapObjectTagMask) ==
+            kHeapObjectTag);
+  }
+  
+  static inline bool HasSmiTag(internal::Object* value) {
+    return ((reinterpret_cast<intptr_t>(value) & kSmiTagMask) == kSmiTag);
+  }
+  
+  static inline int SmiValue(internal::Object* value) {
+    return static_cast<int>(reinterpret_cast<intptr_t>(value)) >> kSmiTagSize;
+  }
+  
+  static inline bool IsExternalTwoByteString(int instance_type) {
+    int representation = (instance_type & kFullStringRepresentationMask);
+    return representation == kExternalTwoByteRepresentationTag;
+  }
+
+  template <typename T>
+  static inline T ReadField(Object* ptr, int offset) {
+    uint8_t* addr = reinterpret_cast<uint8_t*>(ptr) + offset - kHeapObjectTag;
+    return *reinterpret_cast<T*>(addr);
+  }
+
+};
+
+}
+
+
 template <class T>
 Handle<T>::Handle() : val_(0) { }
 
@@ -2652,7 +2766,7 @@ Local<T>::Local() : Handle<T>() { }
 template <class T>
 Local<T> Local<T>::New(Handle<T> that) {
   if (that.IsEmpty()) return Local<T>();
-  void** p = reinterpret_cast<void**>(*that);
+  internal::Object** p = reinterpret_cast<internal::Object**>(*that);
   return Local<T>(reinterpret_cast<T*>(HandleScope::CreateHandle(*p)));
 }
 
@@ -2660,7 +2774,7 @@ Local<T> Local<T>::New(Handle<T> that) {
 template <class T>
 Persistent<T> Persistent<T>::New(Handle<T> that) {
   if (that.IsEmpty()) return Persistent<T>();
-  void** p = reinterpret_cast<void**>(*that);
+  internal::Object** p = reinterpret_cast<internal::Object**>(*that);
   return Persistent<T>(reinterpret_cast<T*>(V8::GlobalizeReference(p)));
 }
 
@@ -2668,21 +2782,21 @@ Persistent<T> Persistent<T>::New(Handle<T> that) {
 template <class T>
 bool Persistent<T>::IsNearDeath() const {
   if (this->IsEmpty()) return false;
-  return V8::IsGlobalNearDeath(reinterpret_cast<void**>(**this));
+  return V8::IsGlobalNearDeath(reinterpret_cast<internal::Object**>(**this));
 }
 
 
 template <class T>
 bool Persistent<T>::IsWeak() const {
   if (this->IsEmpty()) return false;
-  return V8::IsGlobalWeak(reinterpret_cast<void**>(**this));
+  return V8::IsGlobalWeak(reinterpret_cast<internal::Object**>(**this));
 }
 
 
 template <class T>
 void Persistent<T>::Dispose() {
   if (this->IsEmpty()) return;
-  V8::DisposeGlobal(reinterpret_cast<void**>(**this));
+  V8::DisposeGlobal(reinterpret_cast<internal::Object**>(**this));
 }
 
 
@@ -2691,12 +2805,14 @@ Persistent<T>::Persistent() : Handle<T>() { }
 
 template <class T>
 void Persistent<T>::MakeWeak(void* parameters, WeakReferenceCallback callback) {
-  V8::MakeWeak(reinterpret_cast<void**>(**this), parameters, callback);
+  V8::MakeWeak(reinterpret_cast<internal::Object**>(**this),
+               parameters,
+               callback);
 }
 
 template <class T>
 void Persistent<T>::ClearWeak() {
-  V8::ClearWeak(reinterpret_cast<void**>(**this));
+  V8::ClearWeak(reinterpret_cast<internal::Object**>(**this));
 }
 
 Local<Value> Arguments::operator[](int i) const {
@@ -2752,7 +2868,8 @@ Local<Object> AccessorInfo::Holder() const {
 
 template <class T>
 Local<T> HandleScope::Close(Handle<T> value) {
-  void** after = RawClose(reinterpret_cast<void**>(*value));
+  internal::Object** before = reinterpret_cast<internal::Object**>(*value);
+  internal::Object** after = RawClose(before);
   return Local<T>(reinterpret_cast<T*>(after));
 }
 
@@ -2781,6 +2898,171 @@ void Template::Set(const char* name, v8::Handle<Data> value) {
 }
 
 
+Local<Value> Object::GetInternalField(int index) {
+#ifndef V8_ENABLE_CHECKS
+  Local<Value> quick_result = UncheckedGetInternalField(index);
+  if (!quick_result.IsEmpty()) return quick_result;
+#endif
+  return CheckedGetInternalField(index);
+}
+
+
+Local<Value> Object::UncheckedGetInternalField(int index) {
+  typedef internal::Object O;
+  typedef internal::Internals I;
+  O* obj = *reinterpret_cast<O**>(this);
+  O* map = I::ReadField<O*>(obj, I::kHeapObjectMapOffset);
+  int instance_type = I::ReadField<uint8_t>(map, I::kMapInstanceTypeOffset);
+  if (instance_type == I::kJSObjectType) {
+    // If the object is a plain JSObject, which is the common case,
+    // we know where to find the internal fields and can return the
+    // value directly.
+    int offset = I::kJSObjectHeaderSize + (sizeof(void*) * index);
+    O* value = I::ReadField<O*>(obj, offset);
+    O** result = HandleScope::CreateHandle(value);
+    return Local<Value>(reinterpret_cast<Value*>(result));
+  } else {
+    return Local<Value>();
+  }
+}
+
+
+void* External::Unwrap(Handle<v8::Value> obj) {
+#ifdef V8_ENABLE_CHECKS
+  return FullUnwrap(obj);
+#else
+  return QuickUnwrap(obj);
+#endif
+}
+
+
+void* External::QuickUnwrap(Handle<v8::Value> wrapper) {
+  typedef internal::Object O;
+  typedef internal::Internals I;
+  O* obj = *reinterpret_cast<O**>(const_cast<v8::Value*>(*wrapper));
+  if (I::HasSmiTag(obj)) {
+    int value = I::SmiValue(obj) << I::kAlignedPointerShift;
+    return reinterpret_cast<void*>(value);
+  } else {
+    O* map = I::ReadField<O*>(obj, I::kHeapObjectMapOffset);
+    int instance_type = I::ReadField<uint8_t>(map, I::kMapInstanceTypeOffset);
+    if (instance_type == I::kProxyType) {
+      return I::ReadField<void*>(obj, I::kProxyProxyOffset);
+    } else {
+      return NULL;
+    }
+  }
+}
+
+
+void* Object::GetPointerFromInternalField(int index) {
+  return External::Unwrap(GetInternalField(index));
+}
+
+
+String* String::Cast(v8::Value* value) {
+#ifdef V8_ENABLE_CHECKS
+  CheckCast(value);
+#endif
+  return static_cast<String*>(value);
+}
+
+
+String::ExternalStringResource* String::GetExternalStringResource() const {
+  typedef internal::Object O;
+  typedef internal::Internals I;
+  O* obj = *reinterpret_cast<O**>(const_cast<String*>(this));
+  O* map = I::ReadField<O*>(obj, I::kHeapObjectMapOffset);
+  int instance_type = I::ReadField<uint8_t>(map, I::kMapInstanceTypeOffset);
+  String::ExternalStringResource* result;
+  if (I::IsExternalTwoByteString(instance_type)) {
+    void* value = I::ReadField<void*>(obj, I::kStringResourceOffset);
+    result = reinterpret_cast<String::ExternalStringResource*>(value);
+  } else {
+    result = NULL;
+  }
+#ifdef V8_ENABLE_CHECKS
+  VerifyExternalStringResource(result);
+#endif
+  return result;
+}
+
+
+bool Value::IsString() const {
+#ifdef V8_ENABLE_CHECKS
+  return FullIsString();
+#else
+  return QuickIsString();
+#endif
+}
+
+bool Value::QuickIsString() const {
+  typedef internal::Object O;
+  typedef internal::Internals I;
+  O* obj = *reinterpret_cast<O**>(const_cast<Value*>(this));
+  if (!I::HasHeapObjectTag(obj)) return false;
+  O* map = I::ReadField<O*>(obj, I::kHeapObjectMapOffset);
+  int instance_type = I::ReadField<uint8_t>(map, I::kMapInstanceTypeOffset);
+  return (instance_type < I::kFirstNonstringType);
+}
+
+
+Number* Number::Cast(v8::Value* value) {
+#ifdef V8_ENABLE_CHECKS
+  CheckCast(value);
+#endif
+  return static_cast<Number*>(value);
+}
+
+
+Integer* Integer::Cast(v8::Value* value) {
+#ifdef V8_ENABLE_CHECKS
+  CheckCast(value);
+#endif
+  return static_cast<Integer*>(value);
+}
+
+
+Date* Date::Cast(v8::Value* value) {
+#ifdef V8_ENABLE_CHECKS
+  CheckCast(value);
+#endif
+  return static_cast<Date*>(value);
+}
+
+
+Object* Object::Cast(v8::Value* value) {
+#ifdef V8_ENABLE_CHECKS
+  CheckCast(value);
+#endif
+  return static_cast<Object*>(value);
+}
+
+
+Array* Array::Cast(v8::Value* value) {
+#ifdef V8_ENABLE_CHECKS
+  CheckCast(value);
+#endif
+  return static_cast<Array*>(value);
+}
+
+
+Function* Function::Cast(v8::Value* value) {
+#ifdef V8_ENABLE_CHECKS
+  CheckCast(value);
+#endif
+  return static_cast<Function*>(value);
+}
+
+
+External* External::Cast(v8::Value* value) {
+#ifdef V8_ENABLE_CHECKS
+  CheckCast(value);
+#endif
+  return static_cast<External*>(value);
+}
+
+
 /**
  * \example shell.cc
  * A simple shell that takes a list of expressions on the
diff --git a/deps/v8/src/SConscript b/deps/v8/src/SConscript
index 6a38c1a79..fee3fab43 100755
--- a/deps/v8/src/SConscript
+++ b/deps/v8/src/SConscript
@@ -63,32 +63,22 @@ SOURCES = {
     'arm/register-allocator-arm.cc', 'arm/stub-cache-arm.cc',
     'arm/virtual-frame-arm.cc'
   ],
-  'arch:ia32': {
-    'all': [
-      'ia32/assembler-ia32.cc', 'ia32/builtins-ia32.cc', 'ia32/cfg-ia32.cc',
-      'ia32/codegen-ia32.cc', 'ia32/cpu-ia32.cc', 'ia32/disasm-ia32.cc',
-      'ia32/debug-ia32.cc', 'ia32/frames-ia32.cc', 'ia32/ic-ia32.cc',
-      'ia32/jump-target-ia32.cc', 'ia32/macro-assembler-ia32.cc',
-      'ia32/register-allocator-ia32.cc', 'ia32/stub-cache-ia32.cc',
-      'ia32/virtual-frame-ia32.cc'
-    ],
-    'regexp:native': [
-      'ia32/regexp-macro-assembler-ia32.cc',
-    ]
-  },
-  'arch:x64': {
-    'all': [
-      'x64/assembler-x64.cc', 'x64/builtins-x64.cc', 'x64/cfg-x64.cc',
-      'x64/codegen-x64.cc', 'x64/cpu-x64.cc', 'x64/disasm-x64.cc',
-      'x64/debug-x64.cc', 'x64/frames-x64.cc', 'x64/ic-x64.cc',
-      'x64/jump-target-x64.cc', 'x64/macro-assembler-x64.cc',
-      'x64/register-allocator-x64.cc',
-      'x64/stub-cache-x64.cc', 'x64/virtual-frame-x64.cc'
-    ],
-    'regexp:native': [
-      'x64/regexp-macro-assembler-x64.cc'
-    ]
-  },
+  'arch:ia32': [
+    'ia32/assembler-ia32.cc', 'ia32/builtins-ia32.cc', 'ia32/cfg-ia32.cc',
+    'ia32/codegen-ia32.cc', 'ia32/cpu-ia32.cc', 'ia32/disasm-ia32.cc',
+    'ia32/debug-ia32.cc', 'ia32/frames-ia32.cc', 'ia32/ic-ia32.cc',
+    'ia32/jump-target-ia32.cc', 'ia32/macro-assembler-ia32.cc',
+    'ia32/regexp-macro-assembler-ia32.cc', 'ia32/register-allocator-ia32.cc',
+    'ia32/stub-cache-ia32.cc', 'ia32/virtual-frame-ia32.cc'
+  ],
+  'arch:x64': [
+    'x64/assembler-x64.cc', 'x64/builtins-x64.cc', 'x64/cfg-x64.cc',
+    'x64/codegen-x64.cc', 'x64/cpu-x64.cc', 'x64/disasm-x64.cc',
+    'x64/debug-x64.cc', 'x64/frames-x64.cc', 'x64/ic-x64.cc',
+    'x64/jump-target-x64.cc', 'x64/macro-assembler-x64.cc',
+    'x64/regexp-macro-assembler-x64.cc', 'x64/register-allocator-x64.cc',
+    'x64/stub-cache-x64.cc', 'x64/virtual-frame-x64.cc'
+  ],
   'simulator:arm': ['arm/simulator-arm.cc'],
   'os:freebsd': ['platform-freebsd.cc', 'platform-posix.cc'],
   'os:linux':   ['platform-linux.cc', 'platform-posix.cc'],
diff --git a/deps/v8/src/api.cc b/deps/v8/src/api.cc
index bb38356ec..679e038d3 100644
--- a/deps/v8/src/api.cc
+++ b/deps/v8/src/api.cc
@@ -75,7 +75,7 @@ namespace v8 {
           i::V8::FatalProcessOutOfMemory(NULL);                                \
       }                                                                        \
       bool call_depth_is_zero = thread_local.CallDepthIsZero();                \
-      i::Top::OptionalRescheduleException(call_depth_is_zero, false);        \
+      i::Top::OptionalRescheduleException(call_depth_is_zero);                 \
       return value;                                                            \
     }                                                                          \
   } while (false)
@@ -100,7 +100,9 @@ static i::HandleScopeImplementer thread_local;
 
 
 static FatalErrorCallback exception_behavior = NULL;
-
+int i::Internals::kJSObjectType = JS_OBJECT_TYPE;
+int i::Internals::kFirstNonstringType = FIRST_NONSTRING_TYPE;
+int i::Internals::kProxyType = PROXY_TYPE;
 
 static void DefaultFatalErrorHandler(const char* location,
                                      const char* message) {
@@ -223,7 +225,8 @@ ImplementationUtilities::HandleScopeData*
 
 
 #ifdef DEBUG
-void ImplementationUtilities::ZapHandleRange(void** begin, void** end) {
+void ImplementationUtilities::ZapHandleRange(i::Object** begin,
+                                             i::Object** end) {
   i::HandleScope::ZapRange(begin, end);
 }
 #endif
@@ -349,49 +352,47 @@ bool SetResourceConstraints(ResourceConstraints* constraints) {
 }
 
 
-void** V8::GlobalizeReference(void** obj) {
+i::Object** V8::GlobalizeReference(i::Object** obj) {
   if (IsDeadCheck("V8::Persistent::New")) return NULL;
   LOG_API("Persistent::New");
   i::Handle<i::Object> result =
-      i::GlobalHandles::Create(*reinterpret_cast<i::Object**>(obj));
-  return reinterpret_cast<void**>(result.location());
+      i::GlobalHandles::Create(*obj);
+  return result.location();
 }
 
 
-void V8::MakeWeak(void** object, void* parameters,
+void V8::MakeWeak(i::Object** object, void* parameters,
                   WeakReferenceCallback callback) {
   LOG_API("MakeWeak");
-  i::GlobalHandles::MakeWeak(reinterpret_cast<i::Object**>(object), parameters,
-      callback);
+  i::GlobalHandles::MakeWeak(object, parameters, callback);
 }
 
 
-void V8::ClearWeak(void** obj) {
+void V8::ClearWeak(i::Object** obj) {
   LOG_API("ClearWeak");
-  i::GlobalHandles::ClearWeakness(reinterpret_cast<i::Object**>(obj));
+  i::GlobalHandles::ClearWeakness(obj);
 }
 
 
-bool V8::IsGlobalNearDeath(void** obj) {
+bool V8::IsGlobalNearDeath(i::Object** obj) {
   LOG_API("IsGlobalNearDeath");
   if (!i::V8::IsRunning()) return false;
-  return i::GlobalHandles::IsNearDeath(reinterpret_cast<i::Object**>(obj));
+  return i::GlobalHandles::IsNearDeath(obj);
 }
 
 
-bool V8::IsGlobalWeak(void** obj) {
+bool V8::IsGlobalWeak(i::Object** obj) {
   LOG_API("IsGlobalWeak");
   if (!i::V8::IsRunning()) return false;
-  return i::GlobalHandles::IsWeak(reinterpret_cast<i::Object**>(obj));
+  return i::GlobalHandles::IsWeak(obj);
 }
 
 
-void V8::DisposeGlobal(void** obj) {
+void V8::DisposeGlobal(i::Object** obj) {
   LOG_API("DisposeGlobal");
   if (!i::V8::IsRunning()) return;
-  i::Object** ptr = reinterpret_cast<i::Object**>(obj);
-  if ((*ptr)->IsGlobalContext()) i::Heap::NotifyContextDisposed();
-  i::GlobalHandles::Destroy(ptr);
+  if ((*obj)->IsGlobalContext()) i::Heap::NotifyContextDisposed();
+  i::GlobalHandles::Destroy(obj);
 }
 
 // --- H a n d l e s ---
@@ -415,9 +416,8 @@ int HandleScope::NumberOfHandles() {
 }
 
 
-void** v8::HandleScope::CreateHandle(void* value) {
-  return reinterpret_cast<void**>(
-      i::HandleScope::CreateHandle(reinterpret_cast<i::Object*>(value)));
+i::Object** v8::HandleScope::CreateHandle(i::Object* value) {
+  return i::HandleScope::CreateHandle(value);
 }
 
 
@@ -481,7 +481,7 @@ v8::Local<v8::Value> Context::GetData() {
 }
 
 
-void** v8::HandleScope::RawClose(void** value) {
+i::Object** v8::HandleScope::RawClose(i::Object** value) {
   if (!ApiCheck(!is_closed_,
                 "v8::HandleScope::Close()",
                 "Local scope has already been closed")) {
@@ -490,13 +490,13 @@ void** v8::HandleScope::RawClose(void** value) {
   LOG_API("CloseHandleScope");
 
   // Read the result before popping the handle block.
-  i::Object* result = reinterpret_cast<i::Object*>(*value);
+  i::Object* result = *value;
   is_closed_ = true;
   i::HandleScope::Leave(&previous_);
 
   // Allocate a new handle on the previous handle block.
   i::Handle<i::Object> handle(result);
-  return reinterpret_cast<void**>(handle.location());
+  return handle.location();
 }
 
 
@@ -1459,9 +1459,11 @@ bool Value::IsFunction() const {
 }
 
 
-bool Value::IsString() const {
+bool Value::FullIsString() const {
   if (IsDeadCheck("v8::Value::IsString()")) return false;
-  return Utils::OpenHandle(this)->IsString();
+  bool result = Utils::OpenHandle(this)->IsString();
+  ASSERT_EQ(result, QuickIsString());
+  return result;
 }
 
 
@@ -1613,83 +1615,75 @@ Local<Integer> Value::ToInteger() const {
 }
 
 
-External* External::Cast(v8::Value* that) {
-  if (IsDeadCheck("v8::External::Cast()")) return 0;
+void External::CheckCast(v8::Value* that) {
+  if (IsDeadCheck("v8::External::Cast()")) return;
   i::Handle<i::Object> obj = Utils::OpenHandle(that);
   ApiCheck(obj->IsProxy(),
            "v8::External::Cast()",
            "Could not convert to external");
-  return static_cast<External*>(that);
 }
 
 
-v8::Object* v8::Object::Cast(Value* that) {
-  if (IsDeadCheck("v8::Object::Cast()")) return 0;
+void v8::Object::CheckCast(Value* that) {
+  if (IsDeadCheck("v8::Object::Cast()")) return;
   i::Handle<i::Object> obj = Utils::OpenHandle(that);
   ApiCheck(obj->IsJSObject(),
            "v8::Object::Cast()",
            "Could not convert to object");
-  return static_cast<v8::Object*>(that);
 }
 
 
-v8::Function* v8::Function::Cast(Value* that) {
-  if (IsDeadCheck("v8::Function::Cast()")) return 0;
+void v8::Function::CheckCast(Value* that) {
+  if (IsDeadCheck("v8::Function::Cast()")) return;
   i::Handle<i::Object> obj = Utils::OpenHandle(that);
   ApiCheck(obj->IsJSFunction(),
            "v8::Function::Cast()",
            "Could not convert to function");
-  return static_cast<v8::Function*>(that);
 }
 
 
-v8::String* v8::String::Cast(v8::Value* that) {
-  if (IsDeadCheck("v8::String::Cast()")) return 0;
+void v8::String::CheckCast(v8::Value* that) {
+  if (IsDeadCheck("v8::String::Cast()")) return;
   i::Handle<i::Object> obj = Utils::OpenHandle(that);
   ApiCheck(obj->IsString(),
            "v8::String::Cast()",
            "Could not convert to string");
-  return static_cast<v8::String*>(that);
 }
 
 
-v8::Number* v8::Number::Cast(v8::Value* that) {
-  if (IsDeadCheck("v8::Number::Cast()")) return 0;
+void v8::Number::CheckCast(v8::Value* that) {
+  if (IsDeadCheck("v8::Number::Cast()")) return;
   i::Handle<i::Object> obj = Utils::OpenHandle(that);
   ApiCheck(obj->IsNumber(),
            "v8::Number::Cast()",
            "Could not convert to number");
-  return static_cast<v8::Number*>(that);
 }
 
 
-v8::Integer* v8::Integer::Cast(v8::Value* that) {
-  if (IsDeadCheck("v8::Integer::Cast()")) return 0;
+void v8::Integer::CheckCast(v8::Value* that) {
+  if (IsDeadCheck("v8::Integer::Cast()")) return;
   i::Handle<i::Object> obj = Utils::OpenHandle(that);
   ApiCheck(obj->IsNumber(),
            "v8::Integer::Cast()",
            "Could not convert to number");
-  return static_cast<v8::Integer*>(that);
 }
 
 
-v8::Array* v8::Array::Cast(Value* that) {
-  if (IsDeadCheck("v8::Array::Cast()")) return 0;
+void v8::Array::CheckCast(Value* that) {
+  if (IsDeadCheck("v8::Array::Cast()")) return;
   i::Handle<i::Object> obj = Utils::OpenHandle(that);
   ApiCheck(obj->IsJSArray(),
            "v8::Array::Cast()",
            "Could not convert to array");
-  return static_cast<v8::Array*>(that);
 }
 
 
-v8::Date* v8::Date::Cast(v8::Value* that) {
-  if (IsDeadCheck("v8::Date::Cast()")) return 0;
+void v8::Date::CheckCast(v8::Value* that) {
+  if (IsDeadCheck("v8::Date::Cast()")) return;
   i::Handle<i::Object> obj = Utils::OpenHandle(that);
   ApiCheck(obj->HasSpecificClassOf(i::Heap::Date_symbol()),
            "v8::Date::Cast()",
            "Could not convert to date");
-  return static_cast<v8::Date*>(that);
 }
 
 
@@ -2450,16 +2444,17 @@ bool v8::String::IsExternalAscii() const {
 }
 
 
-v8::String::ExternalStringResource*
-v8::String::GetExternalStringResource() const {
-  EnsureInitialized("v8::String::GetExternalStringResource()");
+void v8::String::VerifyExternalStringResource(
+    v8::String::ExternalStringResource* value) const {
   i::Handle<i::String> str = Utils::OpenHandle(this);
+  v8::String::ExternalStringResource* expected;
   if (i::StringShape(*str).IsExternalTwoByte()) {
     void* resource = i::Handle<i::ExternalTwoByteString>::cast(str)->resource();
-    return reinterpret_cast<ExternalStringResource*>(resource);
+    expected = reinterpret_cast<ExternalStringResource*>(resource);
   } else {
-    return NULL;
+    expected = NULL;
   }
+  CHECK_EQ(expected, value);
 }
 
 
@@ -2519,7 +2514,7 @@ int v8::Object::InternalFieldCount() {
 }
 
 
-Local<Value> v8::Object::GetInternalField(int index) {
+Local<Value> v8::Object::CheckedGetInternalField(int index) {
   if (IsDeadCheck("v8::Object::GetInternalField()")) return Local<Value>();
   i::Handle<i::JSObject> obj = Utils::OpenHandle(this);
   if (!ApiCheck(index < obj->GetInternalFieldCount(),
@@ -2528,7 +2523,12 @@ Local<Value> v8::Object::GetInternalField(int index) {
     return Local<Value>();
   }
   i::Handle<i::Object> value(obj->GetInternalField(index));
-  return Utils::ToLocal(value);
+  Local<Value> result = Utils::ToLocal(value);
+#ifdef DEBUG
+  Local<Value> unchecked = UncheckedGetInternalField(index);
+  ASSERT(unchecked.IsEmpty() || (unchecked == result));
+#endif
+  return result;
 }
 
 
@@ -2546,41 +2546,8 @@ void v8::Object::SetInternalField(int index, v8::Handle<Value> value) {
 }
 
 
-void* v8::Object::GetPointerFromInternalField(int index) {
-  i::Handle<i::JSObject> obj = Utils::OpenHandle(this);
-  i::Object* pointer = obj->GetInternalField(index);
-  if (pointer->IsSmi()) {
-    // Fast case, aligned native pointer.
-    return pointer;
-  }
-
-  // Read from uninitialized field.
-  if (!pointer->IsProxy()) {
-    // Play safe even if it's something unexpected.
-    ASSERT(pointer->IsUndefined());
-    return NULL;
-  }
-
-  // Unaligned native pointer.
-  return reinterpret_cast<void*>(i::Proxy::cast(pointer)->proxy());
-}
-
-
 void v8::Object::SetPointerInInternalField(int index, void* value) {
-  i::Handle<i::JSObject> obj = Utils::OpenHandle(this);
-  i::Object* as_object = reinterpret_cast<i::Object*>(value);
-  if (as_object->IsSmi()) {
-    // Aligned pointer, store as is.
-    obj->SetInternalField(index, as_object);
-  } else {
-    // Currently internal fields are used by DOM wrappers which only
-    // get garbage collected by the mark-sweep collector, so we
-    // pretenure the proxy.
-    HandleScope scope;
-    i::Handle<i::Proxy> proxy =
-        i::Factory::NewProxy(reinterpret_cast<i::Address>(value), i::TENURED);
-    if (!proxy.is_null()) obj->SetInternalField(index, *proxy);
-  }
+  SetInternalField(index, External::Wrap(value));
 }
 
 
@@ -2605,12 +2572,14 @@ bool v8::V8::Dispose() {
 
 
 bool v8::V8::IdleNotification(bool is_high_priority) {
+  if (!i::V8::IsRunning()) return false;
   return i::V8::IdleNotification(is_high_priority);
 }
 
 
 void v8::V8::LowMemoryNotification() {
 #if defined(ANDROID)
+  if (!i::V8::IsRunning()) return;
   i::Heap::CollectAllGarbage(true);
 #endif
 }
@@ -2836,8 +2805,6 @@ static void* ExternalValueImpl(i::Handle<i::Object> obj) {
 
 
 static const intptr_t kAlignedPointerMask = 3;
-static const int kAlignedPointerShift = 2;
-
 
 Local<Value> v8::External::Wrap(void* data) {
   STATIC_ASSERT(sizeof(data) == sizeof(i::Address));
@@ -2847,7 +2814,7 @@ Local<Value> v8::External::Wrap(void* data) {
   if ((reinterpret_cast<intptr_t>(data) & kAlignedPointerMask) == 0) {
     uintptr_t data_ptr = reinterpret_cast<uintptr_t>(data);
     intptr_t data_value =
-        static_cast<intptr_t>(data_ptr >> kAlignedPointerShift);
+        static_cast<intptr_t>(data_ptr >> i::Internals::kAlignedPointerShift);
     STATIC_ASSERT(sizeof(data_ptr) == sizeof(data_value));
     if (i::Smi::IsIntptrValid(data_value)) {
       i::Handle<i::Object> obj(i::Smi::FromIntptr(data_value));
@@ -2858,16 +2825,22 @@ Local<Value> v8::External::Wrap(void* data) {
 }
 
 
-void* v8::External::Unwrap(v8::Handle<v8::Value> value) {
+void* v8::External::FullUnwrap(v8::Handle<v8::Value> wrapper) {
   if (IsDeadCheck("v8::External::Unwrap()")) return 0;
-  i::Handle<i::Object> obj = Utils::OpenHandle(*value);
+  i::Handle<i::Object> obj = Utils::OpenHandle(*wrapper);
+  void* result;
   if (obj->IsSmi()) {
     // The external value was an aligned pointer.
-    uintptr_t result = static_cast<uintptr_t>(
-        i::Smi::cast(*obj)->value()) << kAlignedPointerShift;
-    return reinterpret_cast<void*>(result);
+    uintptr_t value = static_cast<uintptr_t>(
+        i::Smi::cast(*obj)->value()) << i::Internals::kAlignedPointerShift;
+    result = reinterpret_cast<void*>(value);
+  } else if (obj->IsProxy()) {
+    result = ExternalValueImpl(obj);
+  } else {
+    result = NULL;
   }
-  return ExternalValueImpl(obj);
+  ASSERT_EQ(result, QuickUnwrap(wrapper));
+  return result;
 }
 
 
@@ -3729,19 +3702,17 @@ char* HandleScopeImplementer::RestoreThreadHelper(char* storage) {
 
 void HandleScopeImplementer::Iterate(
     ObjectVisitor* v,
-    List<void**>* blocks,
+    List<i::Object**>* blocks,
     v8::ImplementationUtilities::HandleScopeData* handle_data) {
   // Iterate over all handles in the blocks except for the last.
   for (int i = blocks->length() - 2; i >= 0; --i) {
-    Object** block =
-        reinterpret_cast<Object**>(blocks->at(i));
+    Object** block = blocks->at(i);
     v->VisitPointers(block, &block[kHandleBlockSize]);
   }
 
   // Iterate over live handles in the last block (if any).
   if (!blocks->is_empty()) {
-    v->VisitPointers(reinterpret_cast<Object**>(blocks->last()),
-       reinterpret_cast<Object**>(handle_data->next));
+    v->VisitPointers(blocks->last(), handle_data->next);
   }
 }
 
@@ -3756,7 +3727,7 @@ void HandleScopeImplementer::Iterate(ObjectVisitor* v) {
 char* HandleScopeImplementer::Iterate(ObjectVisitor* v, char* storage) {
   HandleScopeImplementer* thread_local =
       reinterpret_cast<HandleScopeImplementer*>(storage);
-  List<void**>* blocks_of_archived_thread = thread_local->Blocks();
+  List<internal::Object**>* blocks_of_archived_thread = thread_local->Blocks();
   v8::ImplementationUtilities::HandleScopeData* handle_data_of_archived_thread =
       &thread_local->handle_scope_data_;
   Iterate(v, blocks_of_archived_thread, handle_data_of_archived_thread);
diff --git a/deps/v8/src/api.h b/deps/v8/src/api.h
index f1057a812..ca8f523c9 100644
--- a/deps/v8/src/api.h
+++ b/deps/v8/src/api.h
@@ -338,7 +338,7 @@ class HandleScopeImplementer {
   static char* Iterate(v8::internal::ObjectVisitor* v, char* data);
 
 
-  inline void** GetSpareOrNewBlock();
+  inline internal::Object** GetSpareOrNewBlock();
   inline void DeleteExtensions(int extensions);
 
   inline void IncrementCallDepth() {call_depth++;}
@@ -356,13 +356,13 @@ class HandleScopeImplementer {
   inline Handle<Object> RestoreContext();
   inline bool HasSavedContexts();
 
-  inline List<void**>* Blocks() { return &blocks; }
+  inline List<internal::Object**>* Blocks() { return &blocks; }
 
   inline bool IgnoreOutOfMemory() { return ignore_out_of_memory; }
   inline void SetIgnoreOutOfMemory(bool value) { ignore_out_of_memory = value; }
 
  private:
-  List<void**> blocks;
+  List<internal::Object**> blocks;
   Object** spare;
   int call_depth;
   // Used as a stack to keep track of entered contexts.
@@ -374,7 +374,7 @@ class HandleScopeImplementer {
   v8::ImplementationUtilities::HandleScopeData handle_scope_data_;
 
   static void Iterate(ObjectVisitor* v,
-      List<void**>* blocks,
+      List<internal::Object**>* blocks,
       v8::ImplementationUtilities::HandleScopeData* handle_data);
   char* RestoreThreadHelper(char* from);
   char* ArchiveThreadHelper(char* to);
@@ -420,10 +420,10 @@ Handle<Object> HandleScopeImplementer::LastEnteredContext() {
 
 
 // If there's a spare block, use it for growing the current scope.
-void** HandleScopeImplementer::GetSpareOrNewBlock() {
-  void** block = (spare != NULL) ?
-      reinterpret_cast<void**>(spare) :
-      NewArray<void*>(kHandleBlockSize);
+internal::Object** HandleScopeImplementer::GetSpareOrNewBlock() {
+  internal::Object** block = (spare != NULL) ?
+      spare :
+      NewArray<internal::Object*>(kHandleBlockSize);
   spare = NULL;
   return block;
 }
@@ -435,18 +435,18 @@ void HandleScopeImplementer::DeleteExtensions(int extensions) {
     spare = NULL;
   }
   for (int i = extensions; i > 1; --i) {
-    void** block = blocks.RemoveLast();
+    internal::Object** block = blocks.RemoveLast();
 #ifdef DEBUG
     v8::ImplementationUtilities::ZapHandleRange(block,
                                                 &block[kHandleBlockSize]);
 #endif
     DeleteArray(block);
   }
-  spare = reinterpret_cast<Object**>(blocks.RemoveLast());
+  spare = blocks.RemoveLast();
 #ifdef DEBUG
   v8::ImplementationUtilities::ZapHandleRange(
-      reinterpret_cast<void**>(spare),
-      reinterpret_cast<void**>(&spare[kHandleBlockSize]));
+      spare,
+      &spare[kHandleBlockSize]);
 #endif
 }
 
diff --git a/deps/v8/src/apiutils.h b/deps/v8/src/apiutils.h
index 57453438e..8c791ebdd 100644
--- a/deps/v8/src/apiutils.h
+++ b/deps/v8/src/apiutils.h
@@ -60,7 +60,7 @@ class ImplementationUtilities {
   static HandleScopeData* CurrentHandleScope();
 
 #ifdef DEBUG
-  static void ZapHandleRange(void** begin, void** end);
+  static void ZapHandleRange(internal::Object** begin, internal::Object** end);
 #endif
 };
 
diff --git a/deps/v8/src/arm/assembler-arm-inl.h b/deps/v8/src/arm/assembler-arm-inl.h
index 4dda7ec5b..cb5faa234 100644
--- a/deps/v8/src/arm/assembler-arm-inl.h
+++ b/deps/v8/src/arm/assembler-arm-inl.h
@@ -204,7 +204,7 @@ void Assembler::CheckBuffer() {
   if (buffer_space() <= kGap) {
     GrowBuffer();
   }
-  if (pc_offset() > next_buffer_check_) {
+  if (pc_offset() >= next_buffer_check_) {
     CheckConstPool(false, true);
   }
 }
diff --git a/deps/v8/src/arm/assembler-arm.cc b/deps/v8/src/arm/assembler-arm.cc
index 3ed99f9e1..8bd06dbfe 100644
--- a/deps/v8/src/arm/assembler-arm.cc
+++ b/deps/v8/src/arm/assembler-arm.cc
@@ -329,19 +329,30 @@ const int kEndOfChain = -4;
 
 int Assembler::target_at(int pos)  {
   Instr instr = instr_at(pos);
+  if ((instr & ~Imm24Mask) == 0) {
+    // Emitted label constant, not part of a branch.
+    return instr - (Code::kHeaderSize - kHeapObjectTag);
+  }
   ASSERT((instr & 7*B25) == 5*B25);  // b, bl, or blx imm24
   int imm26 = ((instr & Imm24Mask) << 8) >> 6;
   if ((instr & CondMask) == nv && (instr & B24) != 0)
     // blx uses bit 24 to encode bit 2 of imm26
     imm26 += 2;
 
-  return pos + 8 + imm26;
+  return pos + kPcLoadDelta + imm26;
 }
 
 
 void Assembler::target_at_put(int pos, int target_pos) {
-  int imm26 = target_pos - pos - 8;
   Instr instr = instr_at(pos);
+  if ((instr & ~Imm24Mask) == 0) {
+    ASSERT(target_pos == kEndOfChain || target_pos >= 0);
+    // Emitted label constant, not part of a branch.
+    // Make label relative to Code* of generated Code object.
+    instr_at_put(pos, target_pos + (Code::kHeaderSize - kHeapObjectTag));
+    return;
+  }
+  int imm26 = target_pos - (pos + kPcLoadDelta);
   ASSERT((instr & 7*B25) == 5*B25);  // b, bl, or blx imm24
   if ((instr & CondMask) == nv) {
     // blx uses bit 24 to encode bit 2 of imm26
@@ -368,41 +379,45 @@ void Assembler::print(Label* L) {
     while (l.is_linked()) {
       PrintF("@ %d ", l.pos());
       Instr instr = instr_at(l.pos());
-      ASSERT((instr & 7*B25) == 5*B25);  // b, bl, or blx
-      int cond = instr & CondMask;
-      const char* b;
-      const char* c;
-      if (cond == nv) {
-        b = "blx";
-        c = "";
+      if ((instr & ~Imm24Mask) == 0) {
+        PrintF("value\n");
       } else {
-        if ((instr & B24) != 0)
-          b = "bl";
-        else
-          b = "b";
-
-        switch (cond) {
-          case eq: c = "eq"; break;
-          case ne: c = "ne"; break;
-          case hs: c = "hs"; break;
-          case lo: c = "lo"; break;
-          case mi: c = "mi"; break;
-          case pl: c = "pl"; break;
-          case vs: c = "vs"; break;
-          case vc: c = "vc"; break;
-          case hi: c = "hi"; break;
-          case ls: c = "ls"; break;
-          case ge: c = "ge"; break;
-          case lt: c = "lt"; break;
-          case gt: c = "gt"; break;
-          case le: c = "le"; break;
-          case al: c = ""; break;
-          default:
-            c = "";
-            UNREACHABLE();
+        ASSERT((instr & 7*B25) == 5*B25);  // b, bl, or blx
+        int cond = instr & CondMask;
+        const char* b;
+        const char* c;
+        if (cond == nv) {
+          b = "blx";
+          c = "";
+        } else {
+          if ((instr & B24) != 0)
+            b = "bl";
+          else
+            b = "b";
+
+          switch (cond) {
+            case eq: c = "eq"; break;
+            case ne: c = "ne"; break;
+            case hs: c = "hs"; break;
+            case lo: c = "lo"; break;
+            case mi: c = "mi"; break;
+            case pl: c = "pl"; break;
+            case vs: c = "vs"; break;
+            case vc: c = "vc"; break;
+            case hi: c = "hi"; break;
+            case ls: c = "ls"; break;
+            case ge: c = "ge"; break;
+            case lt: c = "lt"; break;
+            case gt: c = "gt"; break;
+            case le: c = "le"; break;
+            case al: c = ""; break;
+            default:
+              c = "";
+              UNREACHABLE();
+          }
         }
+        PrintF("%s%s\n", b, c);
       }
-      PrintF("%s%s\n", b, c);
       next(&l);
     }
   } else {
@@ -670,8 +685,23 @@ int Assembler::branch_offset(Label* L, bool jump_elimination_allowed) {
   // Block the emission of the constant pool, since the branch instruction must
   // be emitted at the pc offset recorded by the label
   BlockConstPoolBefore(pc_offset() + kInstrSize);
+  return target_pos - (pc_offset() + kPcLoadDelta);
+}
 
-  return target_pos - pc_offset() - 8;
+
+void Assembler::label_at_put(Label* L, int at_offset) {
+  int target_pos;
+  if (L->is_bound()) {
+    target_pos = L->pos();
+  } else {
+    if (L->is_linked()) {
+      target_pos = L->pos();  // L's link
+    } else {
+      target_pos = kEndOfChain;
+    }
+    L->link_to(at_offset);
+    instr_at_put(at_offset, target_pos + (Code::kHeaderSize - kHeapObjectTag));
+  }
 }
 
 
diff --git a/deps/v8/src/arm/assembler-arm.h b/deps/v8/src/arm/assembler-arm.h
index b3ebb8be8..63f04473e 100644
--- a/deps/v8/src/arm/assembler-arm.h
+++ b/deps/v8/src/arm/assembler-arm.h
@@ -39,7 +39,7 @@
 
 #ifndef V8_ARM_ASSEMBLER_ARM_H_
 #define V8_ARM_ASSEMBLER_ARM_H_
-
+#include <stdio.h>
 #include "assembler.h"
 
 namespace v8 {
@@ -165,9 +165,10 @@ enum Coprocessor {
 enum Condition {
   eq =  0 << 28,  // Z set            equal.
   ne =  1 << 28,  // Z clear          not equal.
-  cs =  2 << 28,  // C set            unsigned higher or same.
+  nz =  1 << 28,  // Z clear          not zero.
+  cs =  2 << 28,  // C set            carry set.
   hs =  2 << 28,  // C set            unsigned higher or same.
-  cc =  3 << 28,  // C clear          unsigned lower.
+  cc =  3 << 28,  // C clear          carry clear.
   lo =  3 << 28,  // C clear          unsigned lower.
   mi =  4 << 28,  // N set            negative.
   pl =  5 << 28,  // N clear          positive or zero.
@@ -420,6 +421,10 @@ class Assembler : public Malloced {
   // Manages the jump elimination optimization if the second parameter is true.
   int branch_offset(Label* L, bool jump_elimination_allowed);
 
+  // Puts a labels target address at the given position.
+  // The high 8 bits are set to zero.
+  void label_at_put(Label* L, int at_offset);
+
   // Return the address in the constant pool of the code target address used by
   // the branch/call instruction at pc.
   INLINE(static Address target_address_address_at(Address pc));
@@ -435,6 +440,10 @@ class Assembler : public Malloced {
   // to jump to.
   static const int kPatchReturnSequenceAddressOffset = 1;
 
+  // Difference between address of current opcode and value read from pc
+  // register.
+  static const int kPcLoadDelta = 8;
+
 
   // ---------------------------------------------------------------------------
   // Code generation
@@ -784,6 +793,8 @@ class Assembler : public Malloced {
 
   // Record reloc info for current pc_
   void RecordRelocInfo(RelocInfo::Mode rmode, intptr_t data = 0);
+
+  friend class RegExpMacroAssemblerARM;
 };
 
 } }  // namespace v8::internal
diff --git a/deps/v8/src/arm/builtins-arm.cc b/deps/v8/src/arm/builtins-arm.cc
index 5745a06e8..daf2378eb 100644
--- a/deps/v8/src/arm/builtins-arm.cc
+++ b/deps/v8/src/arm/builtins-arm.cc
@@ -573,7 +573,7 @@ void Builtins::Generate_FunctionApply(MacroAssembler* masm) {
 
 static void EnterArgumentsAdaptorFrame(MacroAssembler* masm) {
   __ mov(r0, Operand(r0, LSL, kSmiTagSize));
-  __ mov(r4, Operand(ArgumentsAdaptorFrame::SENTINEL));
+  __ mov(r4, Operand(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR)));
   __ stm(db_w, sp, r0.bit() | r1.bit() | r4.bit() | fp.bit() | lr.bit());
   __ add(fp, sp, Operand(3 * kPointerSize));
 }
diff --git a/deps/v8/src/arm/codegen-arm.cc b/deps/v8/src/arm/codegen-arm.cc
index 12d828d7e..b94aa10bd 100644
--- a/deps/v8/src/arm/codegen-arm.cc
+++ b/deps/v8/src/arm/codegen-arm.cc
@@ -176,7 +176,8 @@ void CodeGenerator::GenCode(FunctionLiteral* fun) {
     }
 #endif
 
-    // Allocate space for locals and initialize them.
+    // Allocate space for locals and initialize them.  This also checks
+    // for stack overflow.
     frame_->AllocateStackSlots();
     // Initialize the function return target after the locals are set
     // up, because it needs the expected frame height from the frame.
@@ -278,7 +279,6 @@ void CodeGenerator::GenCode(FunctionLiteral* fun) {
       frame_->CallRuntime(Runtime::kTraceEnter, 0);
       // Ignore the return value.
     }
-    CheckStack();
 
     // Compile the body of the function in a vanilla state. Don't
     // bother compiling all the code if the scope has an illegal
@@ -1110,8 +1110,19 @@ void CodeGenerator::CheckStack() {
   VirtualFrame::SpilledScope spilled_scope;
   if (FLAG_check_stack) {
     Comment cmnt(masm_, "[ check stack");
+    __ LoadRoot(ip, Heap::kStackLimitRootIndex);
+    // Put the lr setup instruction in the delay slot.  The 'sizeof(Instr)' is
+    // added to the implicit 8 byte offset that always applies to operations
+    // with pc and gives a return address 12 bytes down.
+    masm_->add(lr, pc, Operand(sizeof(Instr)));
+    masm_->cmp(sp, Operand(ip));
     StackCheckStub stub;
-    frame_->CallStub(&stub, 0);
+    // Call the stub if lower.
+    masm_->mov(pc,
+               Operand(reinterpret_cast<intptr_t>(stub.GetCode().location()),
+                       RelocInfo::CODE_TARGET),
+               LeaveCC,
+               lo);
   }
 }
 
@@ -3322,7 +3333,7 @@ void CodeGenerator::GenerateIsConstructCall(ZoneList<Expression*>* args) {
   // Skip the arguments adaptor frame if it exists.
   Label check_frame_marker;
   __ ldr(r1, MemOperand(r2, StandardFrameConstants::kContextOffset));
-  __ cmp(r1, Operand(ArgumentsAdaptorFrame::SENTINEL));
+  __ cmp(r1, Operand(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR)));
   __ b(ne, &check_frame_marker);
   __ ldr(r2, MemOperand(r2, StandardFrameConstants::kCallerFPOffset));
 
@@ -4934,36 +4945,21 @@ void CompareStub::Generate(MacroAssembler* masm) {
 static void AllocateHeapNumber(
     MacroAssembler* masm,
     Label* need_gc,       // Jump here if young space is full.
-    Register result_reg,  // The tagged address of the new heap number.
-    Register allocation_top_addr_reg,  // A scratch register.
+    Register result,  // The tagged address of the new heap number.
+    Register scratch1,  // A scratch register.
     Register scratch2) {  // Another scratch register.
-  ExternalReference allocation_top =
-      ExternalReference::new_space_allocation_top_address();
-  ExternalReference allocation_limit =
-      ExternalReference::new_space_allocation_limit_address();
-
-  // allocat := the address of the allocation top variable.
-  __ mov(allocation_top_addr_reg, Operand(allocation_top));
-  // result_reg := the old allocation top.
-  __ ldr(result_reg, MemOperand(allocation_top_addr_reg));
-  // scratch2 := the address of the allocation limit.
-  __ mov(scratch2, Operand(allocation_limit));
-  // scratch2 := the allocation limit.
-  __ ldr(scratch2, MemOperand(scratch2));
-  // result_reg := the new allocation top.
-  __ add(result_reg, result_reg, Operand(HeapNumber::kSize));
-  // Compare new new allocation top and limit.
-  __ cmp(result_reg, Operand(scratch2));
-  // Branch if out of space in young generation.
-  __ b(hi, need_gc);
-  // Store new allocation top.
-  __ str(result_reg, MemOperand(allocation_top_addr_reg));  // store new top
-  // Tag and adjust back to start of new object.
-  __ sub(result_reg, result_reg, Operand(HeapNumber::kSize - kHeapObjectTag));
-  // Get heap number map into scratch2.
-  __ LoadRoot(scratch2, Heap::kHeapNumberMapRootIndex);
-  // Store heap number map in new object.
-  __ str(scratch2, FieldMemOperand(result_reg, HeapObject::kMapOffset));
+  // Allocate an object in the heap for the heap number and tag it as a heap
+  // object.
+  __ AllocateObjectInNewSpace(HeapNumber::kSize,
+                              result,
+                              scratch1,
+                              scratch2,
+                              need_gc,
+                              true);
+
+  // Get heap number map and store it in the allocated object.
+  __ LoadRoot(scratch1, Heap::kHeapNumberMapRootIndex);
+  __ str(scratch1, FieldMemOperand(result, HeapObject::kMapOffset));
 }
 
 
@@ -5623,17 +5619,11 @@ void GenericBinaryOpStub::Generate(MacroAssembler* masm) {
 
 
 void StackCheckStub::Generate(MacroAssembler* masm) {
-  Label within_limit;
-  __ mov(ip, Operand(ExternalReference::address_of_stack_guard_limit()));
-  __ ldr(ip, MemOperand(ip));
-  __ cmp(sp, Operand(ip));
-  __ b(hs, &within_limit);
   // Do tail-call to runtime routine.  Runtime routines expect at least one
   // argument, so give it a Smi.
   __ mov(r0, Operand(Smi::FromInt(0)));
   __ push(r0);
   __ TailCallRuntime(ExternalReference(Runtime::kStackGuard), 1);
-  __ bind(&within_limit);
 
   __ StubReturn(1);
 }
@@ -5677,9 +5667,9 @@ void UnarySubStub::Generate(MacroAssembler* masm) {
     __ str(r2, FieldMemOperand(r0, HeapNumber::kExponentOffset));
   } else {
     AllocateHeapNumber(masm, &slow, r1, r2, r3);
-    __ ldr(r2, FieldMemOperand(r0, HeapNumber::kMantissaOffset));
-    __ str(r2, FieldMemOperand(r1, HeapNumber::kMantissaOffset));
+    __ ldr(r3, FieldMemOperand(r0, HeapNumber::kMantissaOffset));
     __ ldr(r2, FieldMemOperand(r0, HeapNumber::kExponentOffset));
+    __ str(r3, FieldMemOperand(r1, HeapNumber::kMantissaOffset));
     __ eor(r2, r2, Operand(HeapNumber::kSignMask));  // Flip sign.
     __ str(r2, FieldMemOperand(r1, HeapNumber::kExponentOffset));
     __ mov(r0, Operand(r1));
@@ -5984,9 +5974,9 @@ void JSEntryStub::GenerateBody(MacroAssembler* masm, bool is_construct) {
   // r2: receiver
   // r3: argc
   // r4: argv
-  int marker = is_construct ? StackFrame::ENTRY_CONSTRUCT : StackFrame::ENTRY;
   __ mov(r8, Operand(-1));  // Push a bad frame pointer to fail if it is used.
-  __ mov(r7, Operand(~ArgumentsAdaptorFrame::SENTINEL));
+  int marker = is_construct ? StackFrame::ENTRY_CONSTRUCT : StackFrame::ENTRY;
+  __ mov(r7, Operand(Smi::FromInt(marker)));
   __ mov(r6, Operand(Smi::FromInt(marker)));
   __ mov(r5, Operand(ExternalReference(Top::k_c_entry_fp_address)));
   __ ldr(r5, MemOperand(r5));
@@ -6143,7 +6133,7 @@ void ArgumentsAccessStub::GenerateReadLength(MacroAssembler* masm) {
   Label adaptor;
   __ ldr(r2, MemOperand(fp, StandardFrameConstants::kCallerFPOffset));
   __ ldr(r3, MemOperand(r2, StandardFrameConstants::kContextOffset));
-  __ cmp(r3, Operand(ArgumentsAdaptorFrame::SENTINEL));
+  __ cmp(r3, Operand(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR)));
   __ b(eq, &adaptor);
 
   // Nothing to do: The formal number of parameters has already been
@@ -6172,7 +6162,7 @@ void ArgumentsAccessStub::GenerateReadElement(MacroAssembler* masm) {
   Label adaptor;
   __ ldr(r2, MemOperand(fp, StandardFrameConstants::kCallerFPOffset));
   __ ldr(r3, MemOperand(r2, StandardFrameConstants::kContextOffset));
-  __ cmp(r3, Operand(ArgumentsAdaptorFrame::SENTINEL));
+  __ cmp(r3, Operand(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR)));
   __ b(eq, &adaptor);
 
   // Check index against formal parameters count limit passed in
@@ -6214,7 +6204,7 @@ void ArgumentsAccessStub::GenerateNewObject(MacroAssembler* masm) {
   Label runtime;
   __ ldr(r2, MemOperand(fp, StandardFrameConstants::kCallerFPOffset));
   __ ldr(r3, MemOperand(r2, StandardFrameConstants::kContextOffset));
-  __ cmp(r3, Operand(ArgumentsAdaptorFrame::SENTINEL));
+  __ cmp(r3, Operand(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR)));
   __ b(ne, &runtime);
 
   // Patch the arguments.length and the parameters pointer.
diff --git a/deps/v8/src/arm/disasm-arm.cc b/deps/v8/src/arm/disasm-arm.cc
index 0abe35b9e..2638409e8 100644
--- a/deps/v8/src/arm/disasm-arm.cc
+++ b/deps/v8/src/arm/disasm-arm.cc
@@ -119,6 +119,7 @@ class Decoder {
   void DecodeType5(Instr* instr);
   void DecodeType6(Instr* instr);
   void DecodeType7(Instr* instr);
+  void DecodeUnconditional(Instr* instr);
 
   const disasm::NameConverter& converter_;
   v8::internal::Vector<char> out_buffer_;
@@ -774,6 +775,67 @@ void Decoder::DecodeType7(Instr* instr) {
 }
 
 
+void Decoder::DecodeUnconditional(Instr* instr) {
+  if (instr->Bits(7, 4) == 0xB && instr->Bits(27, 25) == 0 && instr->HasL()) {
+    Format(instr, "'memop'h'pu 'rd, ");
+    bool immediate = instr->HasB();
+    switch (instr->PUField()) {
+      case 0: {
+        // Post index, negative.
+        if (instr->HasW()) {
+          Unknown(instr);
+          break;
+        }
+        if (immediate) {
+          Format(instr, "['rn], #-'imm12");
+        } else {
+          Format(instr, "['rn], -'rm");
+        }
+        break;
+      }
+      case 1: {
+        // Post index, positive.
+        if (instr->HasW()) {
+          Unknown(instr);
+          break;
+        }
+        if (immediate) {
+          Format(instr, "['rn], #+'imm12");
+        } else {
+          Format(instr, "['rn], +'rm");
+        }
+        break;
+      }
+      case 2: {
+        // Pre index or offset, negative.
+        if (immediate) {
+          Format(instr, "['rn, #-'imm12]'w");
+        } else {
+          Format(instr, "['rn, -'rm]'w");
+        }
+        break;
+      }
+      case 3: {
+        // Pre index or offset, positive.
+        if (immediate) {
+          Format(instr, "['rn, #+'imm12]'w");
+        } else {
+          Format(instr, "['rn, +'rm]'w");
+        }
+        break;
+      }
+      default: {
+        // The PU field is a 2-bit field.
+        UNREACHABLE();
+        break;
+      }
+    }
+    return;
+  }
+  Format(instr, "break 'msg");
+}
+
+
 // Disassemble the instruction at *instr_ptr into the output buffer.
 int Decoder::InstructionDecode(byte* instr_ptr) {
   Instr* instr = Instr::At(instr_ptr);
@@ -782,7 +844,7 @@ int Decoder::InstructionDecode(byte* instr_ptr) {
                                        "%08x       ",
                                        instr->InstructionBits());
   if (instr->ConditionField() == special_condition) {
-    Format(instr, "break 'msg");
+    DecodeUnconditional(instr);
     return Instr::kInstrSize;
   }
   switch (instr->TypeField()) {
diff --git a/deps/v8/src/arm/macro-assembler-arm.cc b/deps/v8/src/arm/macro-assembler-arm.cc
index 4e337c4bb..2ca489868 100644
--- a/deps/v8/src/arm/macro-assembler-arm.cc
+++ b/deps/v8/src/arm/macro-assembler-arm.cc
@@ -768,6 +768,44 @@ void MacroAssembler::CheckAccessGlobalProxy(Register holder_reg,
 }
 
 
+void MacroAssembler::AllocateObjectInNewSpace(int object_size,
+                                              Register result,
+                                              Register scratch1,
+                                              Register scratch2,
+                                              Label* gc_required,
+                                              bool tag_allocated_object) {
+  ASSERT(!result.is(scratch1));
+  ASSERT(!scratch1.is(scratch2));
+
+  // Load address of new object into result and allocation top address into
+  // scratch1.
+  ExternalReference new_space_allocation_top =
+      ExternalReference::new_space_allocation_top_address();
+  mov(scratch1, Operand(new_space_allocation_top));
+  ldr(result, MemOperand(scratch1));
+
+  // Calculate new top and bail out if new space is exhausted. Use result
+  // to calculate the new top.
+  ExternalReference new_space_allocation_limit =
+      ExternalReference::new_space_allocation_limit_address();
+  mov(scratch2, Operand(new_space_allocation_limit));
+  ldr(scratch2, MemOperand(scratch2));
+  add(result, result, Operand(object_size));
+  cmp(result, Operand(scratch2));
+  b(hi, gc_required);
+
+  // Update allocation top. result temporarily holds the new top,
+  str(result, MemOperand(scratch1));
+
+  // Tag and adjust back to start of new object.
+  if (tag_allocated_object) {
+    sub(result, result, Operand(object_size - kHeapObjectTag));
+  } else {
+    sub(result, result, Operand(object_size));
+  }
+}
+
+
 void MacroAssembler::CompareObjectType(Register function,
                                        Register map,
                                        Register type_reg,
@@ -825,9 +863,9 @@ void MacroAssembler::TryGetFunctionPrototype(Register function,
 }
 
 
-void MacroAssembler::CallStub(CodeStub* stub) {
+void MacroAssembler::CallStub(CodeStub* stub, Condition cond) {
   ASSERT(allow_stub_calls());  // stub calls are not allowed in some stubs
-  Call(stub->GetCode(), RelocInfo::CODE_TARGET);
+  Call(stub->GetCode(), RelocInfo::CODE_TARGET, cond);
 }
 
 
@@ -1022,4 +1060,5 @@ void MacroAssembler::Abort(const char* msg) {
   // will not return here
 }
 
+
 } }  // namespace v8::internal
diff --git a/deps/v8/src/arm/macro-assembler-arm.h b/deps/v8/src/arm/macro-assembler-arm.h
index a35c98a20..4bbd9802f 100644
--- a/deps/v8/src/arm/macro-assembler-arm.h
+++ b/deps/v8/src/arm/macro-assembler-arm.h
@@ -188,6 +188,20 @@ class MacroAssembler: public Assembler {
 
 
   // ---------------------------------------------------------------------------
+  // Allocation support
+
+  // Allocate an object in new space. If the new space is exhausted control
+  // continues at the gc_required label. The allocated object is returned in
+  // result. If the flag tag_allocated_object is true the result is tagged as
+  // as a heap object.
+  void AllocateObjectInNewSpace(int object_size,
+                                Register result,
+                                Register scratch1,
+                                Register scratch2,
+                                Label* gc_required,
+                                bool tag_allocated_object);
+
+  // ---------------------------------------------------------------------------
   // Support functions.
 
   // Try to get function prototype of a function and puts the value in
@@ -231,7 +245,7 @@ class MacroAssembler: public Assembler {
   // Runtime calls
 
   // Call a code stub.
-  void CallStub(CodeStub* stub);
+  void CallStub(CodeStub* stub, Condition cond = al);
   void CallJSExitStub(CodeStub* stub);
 
   // Return from a code stub after popping its arguments.
diff --git a/deps/v8/src/arm/regexp-macro-assembler-arm.cc b/deps/v8/src/arm/regexp-macro-assembler-arm.cc
index 78ebc7e80..252d7839f 100644
--- a/deps/v8/src/arm/regexp-macro-assembler-arm.cc
+++ b/deps/v8/src/arm/regexp-macro-assembler-arm.cc
@@ -1,4 +1,4 @@
-// Copyright 2006-2008 the V8 project authors. All rights reserved.
+// Copyright 2009 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:
@@ -26,19 +26,1201 @@
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 #include "v8.h"
+#include "unicode.h"
+#include "log.h"
 #include "ast.h"
+#include "regexp-stack.h"
+#include "macro-assembler.h"
 #include "regexp-macro-assembler.h"
+#include "arm/macro-assembler-arm.h"
 #include "arm/regexp-macro-assembler-arm.h"
 
 namespace v8 {
 namespace internal {
 
-RegExpMacroAssemblerARM::RegExpMacroAssemblerARM() {
-  UNIMPLEMENTED();
+#ifdef V8_NATIVE_REGEXP
+/*
+ * This assembler uses the following register assignment convention
+ * - r5 : Pointer to current code object (Code*) including heap object tag.
+ * - r6 : Current position in input, as negative offset from end of string.
+ *        Please notice that this is the byte offset, not the character offset!
+ * - r7 : Currently loaded character. Must be loaded using
+ *        LoadCurrentCharacter before using any of the dispatch methods.
+ * - r8 : points to tip of backtrack stack
+ * - r9 : Unused, might be used by C code and expected unchanged.
+ * - r10 : End of input (points to byte after last character in input).
+ * - r11 : Frame pointer. Used to access arguments, local variables and
+ *         RegExp registers.
+ * - r12 : IP register, used by assembler. Very volatile.
+ * - r13/sp : points to tip of C stack.
+ *
+ * The remaining registers are free for computations.
+ *
+ * Each call to a public method should retain this convention.
+ * The stack will have the following structure:
+ *       - stack_area_base    (High end of the memory area to use as
+ *                             backtracking stack)
+ *       - at_start           (if 1, start at start of string, if 0, don't)
+ *       --- sp when called ---
+ *       - link address
+ *       - backup of registers r4..r11
+ *       - int* capture_array (int[num_saved_registers_], for output).
+ *       - end of input       (Address of end of string)
+ *       - start of input     (Address of first character in string)
+ *       --- frame pointer ----
+ *       - void* input_string (location of a handle containing the string)
+ *       - Offset of location before start of input (effectively character
+ *         position -1). Used to initialize capture registers to a non-position.
+ *       - register 0         (Only positions must be stored in the first
+ *       - register 1          num_saved_registers_ registers)
+ *       - ...
+ *       - register num_registers-1
+ *       --- sp ---
+ *
+ * The first num_saved_registers_ registers are initialized to point to
+ * "character -1" in the string (i.e., char_size() bytes before the first
+ * character of the string). The remaining registers start out as garbage.
+ *
+ * The data up to the return address must be placed there by the calling
+ * code, by calling the code entry as cast to a function with the signature:
+ * int (*match)(String* input_string,
+ *              Address start,
+ *              Address end,
+ *              int* capture_output_array,
+ *              bool at_start,
+ *              byte* stack_area_base)
+ * The call is performed by NativeRegExpMacroAssembler::Execute()
+ * (in regexp-macro-assembler.cc).
+ */
+
+#define __ ACCESS_MASM(masm_)
+
+RegExpMacroAssemblerARM::RegExpMacroAssemblerARM(
+    Mode mode,
+    int registers_to_save)
+    : masm_(new MacroAssembler(NULL, kRegExpCodeSize)),
+      mode_(mode),
+      num_registers_(registers_to_save),
+      num_saved_registers_(registers_to_save),
+      entry_label_(),
+      start_label_(),
+      success_label_(),
+      backtrack_label_(),
+      exit_label_() {
+  ASSERT_EQ(0, registers_to_save % 2);
+  __ jmp(&entry_label_);   // We'll write the entry code later.
+  EmitBacktrackConstantPool();
+  __ bind(&start_label_);  // And then continue from here.
 }
 
 
-RegExpMacroAssemblerARM::~RegExpMacroAssemblerARM() {}
+RegExpMacroAssemblerARM::~RegExpMacroAssemblerARM() {
+  delete masm_;
+  // Unuse labels in case we throw away the assembler without calling GetCode.
+  entry_label_.Unuse();
+  start_label_.Unuse();
+  success_label_.Unuse();
+  backtrack_label_.Unuse();
+  exit_label_.Unuse();
+  check_preempt_label_.Unuse();
+  stack_overflow_label_.Unuse();
+}
+
+
+int RegExpMacroAssemblerARM::stack_limit_slack()  {
+  return RegExpStack::kStackLimitSlack;
+}
+
+
+void RegExpMacroAssemblerARM::AdvanceCurrentPosition(int by) {
+  if (by != 0) {
+    Label inside_string;
+    __ add(current_input_offset(),
+           current_input_offset(), Operand(by * char_size()));
+  }
+}
+
+
+void RegExpMacroAssemblerARM::AdvanceRegister(int reg, int by) {
+  ASSERT(reg >= 0);
+  ASSERT(reg < num_registers_);
+  if (by != 0) {
+    __ ldr(r0, register_location(reg));
+    __ add(r0, r0, Operand(by));
+    __ str(r0, register_location(reg));
+  }
+}
+
+
+void RegExpMacroAssemblerARM::Backtrack() {
+  CheckPreemption();
+  // Pop Code* offset from backtrack stack, add Code* and jump to location.
+  Pop(r0);
+  __ add(pc, r0, Operand(r5));
+}
+
+
+void RegExpMacroAssemblerARM::Bind(Label* label) {
+  __ bind(label);
+}
+
+
+void RegExpMacroAssemblerARM::CheckCharacter(uint32_t c, Label* on_equal) {
+  __ cmp(current_character(), Operand(c));
+  BranchOrBacktrack(eq, on_equal);
+}
+
+
+void RegExpMacroAssemblerARM::CheckCharacterGT(uc16 limit, Label* on_greater) {
+  __ cmp(current_character(), Operand(limit));
+  BranchOrBacktrack(gt, on_greater);
+}
+
+
+void RegExpMacroAssemblerARM::CheckAtStart(Label* on_at_start) {
+  Label not_at_start;
+  // Did we start the match at the start of the string at all?
+  __ ldr(r0, MemOperand(frame_pointer(), kAtStart));
+  __ cmp(r0, Operand(0));
+  BranchOrBacktrack(eq, &not_at_start);
+
+  // If we did, are we still at the start of the input?
+  __ ldr(r1, MemOperand(frame_pointer(), kInputStart));
+  __ add(r0, end_of_input_address(), Operand(current_input_offset()));
+  __ cmp(r0, r1);
+  BranchOrBacktrack(eq, on_at_start);
+  __ bind(&not_at_start);
+}
+
+
+void RegExpMacroAssemblerARM::CheckNotAtStart(Label* on_not_at_start) {
+  // Did we start the match at the start of the string at all?
+  __ ldr(r0, MemOperand(frame_pointer(), kAtStart));
+  __ cmp(r0, Operand(0));
+  BranchOrBacktrack(eq, on_not_at_start);
+  // If we did, are we still at the start of the input?
+  __ ldr(r1, MemOperand(frame_pointer(), kInputStart));
+  __ add(r0, end_of_input_address(), Operand(current_input_offset()));
+  __ cmp(r0, r1);
+  BranchOrBacktrack(ne, on_not_at_start);
+}
+
+
+void RegExpMacroAssemblerARM::CheckCharacterLT(uc16 limit, Label* on_less) {
+  __ cmp(current_character(), Operand(limit));
+  BranchOrBacktrack(lt, on_less);
+}
+
+
+void RegExpMacroAssemblerARM::CheckCharacters(Vector<const uc16> str,
+                                              int cp_offset,
+                                              Label* on_failure,
+                                              bool check_end_of_string) {
+  int byte_length = str.length() * char_size();
+  int byte_offset = cp_offset * char_size();
+  if (check_end_of_string) {
+    // Check that there are at least str.length() characters left in the input.
+    __ cmp(end_of_input_address(), Operand(-(byte_offset + byte_length)));
+    BranchOrBacktrack(gt, on_failure);
+  }
+
+  if (on_failure == NULL) {
+    // Instead of inlining a backtrack, (re)use the global backtrack target.
+    on_failure = &backtrack_label_;
+  }
+
+  __ add(r0, end_of_input_address(), Operand(current_input_offset()));
+  int stored_high_byte = 0;
+  for (int i = 0; i < str.length(); i++) {
+    if (mode_ == ASCII) {
+      __ ldrb(r1, MemOperand(r0, char_size(), PostIndex));
+      // str[i] is known to be an ASCII character.
+      __ cmp(r1, Operand(str[i]));
+    } else {
+      __ ldrh(r1, MemOperand(r0, char_size(), PostIndex));
+      uc16 match_char = str[i];
+      int match_high_byte = (match_char >> 8);
+      if (match_high_byte == 0) {
+        __ cmp(r1, Operand(str[i]));
+      } else {
+        if (match_high_byte != stored_high_byte) {
+          __ mov(r2, Operand(match_high_byte));
+          stored_high_byte = match_high_byte;
+        }
+        __ add(r3, r2, Operand(match_char & 0xff));
+        __ cmp(r1, r3);
+      }
+    }
+    BranchOrBacktrack(ne, on_failure);
+  }
+}
+
+
+void RegExpMacroAssemblerARM::CheckGreedyLoop(Label* on_equal) {
+  __ ldr(r0, MemOperand(backtrack_stackpointer(), 0));
+  __ cmp(current_input_offset(), r0);
+  __ add(backtrack_stackpointer(),
+         backtrack_stackpointer(), Operand(kPointerSize), LeaveCC, eq);
+  BranchOrBacktrack(eq, on_equal);
+}
+
+
+void RegExpMacroAssemblerARM::CheckNotBackReferenceIgnoreCase(
+    int start_reg,
+    Label* on_no_match) {
+  Label fallthrough;
+  __ ldr(r0, register_location(start_reg));  // Index of start of capture
+  __ ldr(r1, register_location(start_reg + 1));  // Index of end of capture
+  __ sub(r1, r1, r0, SetCC);  // Length of capture.
+
+  // If length is zero, either the capture is empty or it is not participating.
+  // In either case succeed immediately.
+  __ b(eq, &fallthrough);
+
+  // Check that there are enough characters left in the input.
+  __ cmn(r1, Operand(current_input_offset()));
+  BranchOrBacktrack(gt, on_no_match);
+
+  if (mode_ == ASCII) {
+    Label success;
+    Label fail;
+    Label loop_check;
+
+    // r0 - offset of start of capture
+    // r1 - length of capture
+    __ add(r0, r0, Operand(end_of_input_address()));
+    __ add(r2, end_of_input_address(), Operand(current_input_offset()));
+    __ add(r1, r0, Operand(r1));
+
+    // r0 - Address of start of capture.
+    // r1 - Address of end of capture
+    // r2 - Address of current input position.
+
+    Label loop;
+    __ bind(&loop);
+    __ ldrb(r3, MemOperand(r0, char_size(), PostIndex));
+    __ ldrb(r4, MemOperand(r2, char_size(), PostIndex));
+    __ cmp(r4, r3);
+    __ b(eq, &loop_check);
+
+    // Mismatch, try case-insensitive match (converting letters to lower-case).
+    __ orr(r3, r3, Operand(0x20));  // Convert capture character to lower-case.
+    __ orr(r4, r4, Operand(0x20));  // Also convert input character.
+    __ cmp(r4, r3);
+    __ b(ne, &fail);
+    __ sub(r3, r3, Operand('a'));
+    __ cmp(r3, Operand('z' - 'a'));  // Is r3 a lowercase letter?
+    __ b(hi, &fail);
+
+
+    __ bind(&loop_check);
+    __ cmp(r0, r1);
+    __ b(lt, &loop);
+    __ jmp(&success);
+
+    __ bind(&fail);
+    BranchOrBacktrack(al, on_no_match);
+
+    __ bind(&success);
+    // Compute new value of character position after the matched part.
+    __ sub(current_input_offset(), r2, end_of_input_address());
+  } else {
+    ASSERT(mode_ == UC16);
+    int argument_count = 3;
+    FrameAlign(argument_count, r2);
+
+    // r0 - offset of start of capture
+    // r1 - length of capture
+
+    // Put arguments into arguments registers.
+    // Parameters are
+    //   r0: Address byte_offset1 - Address captured substring's start.
+    //   r1: Address byte_offset2 - Address of current character position.
+    //   r2: size_t byte_length - length of capture in bytes(!)
+
+    // Address of start of capture.
+    __ add(r0, r0, Operand(end_of_input_address()));
+    // Length of capture.
+    __ mov(r2, Operand(r1));
+    // Save length in callee-save register for use on return.
+    __ mov(r4, Operand(r1));
+    // Address of current input position.
+    __ add(r1, current_input_offset(), Operand(end_of_input_address()));
+
+    ExternalReference function =
+        ExternalReference::re_case_insensitive_compare_uc16();
+    CallCFunction(function, argument_count);
+
+    // Check if function returned non-zero for success or zero for failure.
+    __ cmp(r0, Operand(0));
+    BranchOrBacktrack(eq, on_no_match);
+    // On success, increment position by length of capture.
+    __ add(current_input_offset(), current_input_offset(), Operand(r4));
+  }
+
+  __ bind(&fallthrough);
+}
+
+
+void RegExpMacroAssemblerARM::CheckNotBackReference(
+    int start_reg,
+    Label* on_no_match) {
+  Label fallthrough;
+  Label success;
+
+  // Find length of back-referenced capture.
+  __ ldr(r0, register_location(start_reg));
+  __ ldr(r1, register_location(start_reg + 1));
+  __ sub(r1, r1, r0, SetCC);  // Length to check.
+  // Succeed on empty capture (including no capture).
+  __ b(eq, &fallthrough);
+
+  // Check that there are enough characters left in the input.
+  __ cmn(r1, Operand(current_input_offset()));
+  BranchOrBacktrack(gt, on_no_match);
+
+  // Compute pointers to match string and capture string
+  __ add(r0, r0, Operand(end_of_input_address()));
+  __ add(r2, end_of_input_address(), Operand(current_input_offset()));
+  __ add(r1, r1, Operand(r0));
+
+  Label loop;
+  __ bind(&loop);
+  if (mode_ == ASCII) {
+    __ ldrb(r3, MemOperand(r0, char_size(), PostIndex));
+    __ ldrb(r4, MemOperand(r2, char_size(), PostIndex));
+  } else {
+    ASSERT(mode_ == UC16);
+    __ ldrh(r3, MemOperand(r0, char_size(), PostIndex));
+    __ ldrh(r4, MemOperand(r2, char_size(), PostIndex));
+  }
+  __ cmp(r3, r4);
+  BranchOrBacktrack(ne, on_no_match);
+  __ cmp(r0, r1);
+  __ b(lt, &loop);
+
+  // Move current character position to position after match.
+  __ sub(current_input_offset(), r2, end_of_input_address());
+  __ bind(&fallthrough);
+}
+
+
+void RegExpMacroAssemblerARM::CheckNotRegistersEqual(int reg1,
+                                                      int reg2,
+                                                      Label* on_not_equal) {
+  __ ldr(r0, register_location(reg1));
+  __ ldr(r1, register_location(reg2));
+  __ cmp(r0, r1);
+  BranchOrBacktrack(ne, on_not_equal);
+}
+
+
+void RegExpMacroAssemblerARM::CheckNotCharacter(uint32_t c,
+                                                Label* on_not_equal) {
+  __ cmp(current_character(), Operand(c));
+  BranchOrBacktrack(ne, on_not_equal);
+}
+
+
+void RegExpMacroAssemblerARM::CheckCharacterAfterAnd(uint32_t c,
+                                                     uint32_t mask,
+                                                     Label* on_equal) {
+  __ and_(r0, current_character(), Operand(mask));
+  __ cmp(r0, Operand(c));
+  BranchOrBacktrack(eq, on_equal);
+}
+
+
+void RegExpMacroAssemblerARM::CheckNotCharacterAfterAnd(uint32_t c,
+                                                        uint32_t mask,
+                                                        Label* on_not_equal) {
+  __ and_(r0, current_character(), Operand(mask));
+  __ cmp(r0, Operand(c));
+  BranchOrBacktrack(ne, on_not_equal);
+}
+
+
+void RegExpMacroAssemblerARM::CheckNotCharacterAfterMinusAnd(
+    uc16 c,
+    uc16 minus,
+    uc16 mask,
+    Label* on_not_equal) {
+  ASSERT(minus < String::kMaxUC16CharCode);
+  __ sub(r0, current_character(), Operand(minus));
+  __ and_(r0, r0, Operand(mask));
+  __ cmp(r0, Operand(c));
+  BranchOrBacktrack(ne, on_not_equal);
+}
+
+
+bool RegExpMacroAssemblerARM::CheckSpecialCharacterClass(uc16 type,
+                                                         int cp_offset,
+                                                         bool check_offset,
+                                                         Label* on_no_match) {
+  // Range checks (c in min..max) are generally implemented by an unsigned
+  // (c - min) <= (max - min) check
+  switch (type) {
+  case 's':
+    // Match space-characters
+    if (mode_ == ASCII) {
+      // ASCII space characters are '\t'..'\r' and ' '.
+      if (check_offset) {
+        LoadCurrentCharacter(cp_offset, on_no_match);
+      } else {
+        LoadCurrentCharacterUnchecked(cp_offset, 1);
+      }
+      Label success;
+      __ cmp(current_character(), Operand(' '));
+      __ b(eq, &success);
+      // Check range 0x09..0x0d
+      __ sub(r0, current_character(), Operand('\t'));
+      __ cmp(r0, Operand('\r' - '\t'));
+      BranchOrBacktrack(hi, on_no_match);
+      __ bind(&success);
+      return true;
+    }
+    return false;
+  case 'S':
+    // Match non-space characters.
+    if (check_offset) {
+      LoadCurrentCharacter(cp_offset, on_no_match, 1);
+    } else {
+      LoadCurrentCharacterUnchecked(cp_offset, 1);
+    }
+    if (mode_ == ASCII) {
+      // ASCII space characters are '\t'..'\r' and ' '.
+      __ cmp(current_character(), Operand(' '));
+      BranchOrBacktrack(eq, on_no_match);
+      __ sub(r0, current_character(), Operand('\t'));
+      __ cmp(r0, Operand('\r' - '\t'));
+      BranchOrBacktrack(ls, on_no_match);
+      return true;
+    }
+    return false;
+  case 'd':
+    // Match ASCII digits ('0'..'9')
+    if (check_offset) {
+      LoadCurrentCharacter(cp_offset, on_no_match, 1);
+    } else {
+      LoadCurrentCharacterUnchecked(cp_offset, 1);
+    }
+    __ sub(r0, current_character(), Operand('0'));
+    __ cmp(current_character(), Operand('9' - '0'));
+    BranchOrBacktrack(hi, on_no_match);
+    return true;
+  case 'D':
+    // Match non ASCII-digits
+    if (check_offset) {
+      LoadCurrentCharacter(cp_offset, on_no_match, 1);
+    } else {
+      LoadCurrentCharacterUnchecked(cp_offset, 1);
+    }
+    __ sub(r0, current_character(), Operand('0'));
+    __ cmp(r0, Operand('9' - '0'));
+    BranchOrBacktrack(ls, on_no_match);
+    return true;
+  case '.': {
+    // Match non-newlines (not 0x0a('\n'), 0x0d('\r'), 0x2028 and 0x2029)
+    if (check_offset) {
+      LoadCurrentCharacter(cp_offset, on_no_match, 1);
+    } else {
+      LoadCurrentCharacterUnchecked(cp_offset, 1);
+    }
+    __ eor(r0, current_character(), Operand(0x01));
+    // See if current character is '\n'^1 or '\r'^1, i.e., 0x0b or 0x0c
+    __ sub(r0, r0, Operand(0x0b));
+    __ cmp(r0, Operand(0x0c - 0x0b));
+    BranchOrBacktrack(ls, on_no_match);
+    if (mode_ == UC16) {
+      // Compare original value to 0x2028 and 0x2029, using the already
+      // computed (current_char ^ 0x01 - 0x0b). I.e., check for
+      // 0x201d (0x2028 - 0x0b) or 0x201e.
+      __ sub(r0, r0, Operand(0x2028 - 0x0b));
+      __ cmp(r0, Operand(1));
+      BranchOrBacktrack(ls, on_no_match);
+    }
+    return true;
+  }
+  case '*':
+    // Match any character.
+    if (check_offset) {
+      CheckPosition(cp_offset, on_no_match);
+    }
+    return true;
+  // No custom implementation (yet): w, W, s(UC16), S(UC16).
+  default:
+    return false;
+  }
+}
+
+
+void RegExpMacroAssemblerARM::Fail() {
+  __ mov(r0, Operand(FAILURE));
+  __ jmp(&exit_label_);
+}
+
+
+Handle<Object> RegExpMacroAssemblerARM::GetCode(Handle<String> source) {
+  // Finalize code - write the entry point code now we know how many
+  // registers we need.
+
+  // Entry code:
+  __ bind(&entry_label_);
+  // Push Link register.
+  // Push arguments
+  // Save callee-save registers.
+  // Start new stack frame.
+  // Order here should correspond to order of offset constants in header file.
+  RegList registers_to_retain = r4.bit() | r5.bit() | r6.bit() |
+      r7.bit() | r8.bit() | r9.bit() | r10.bit() | fp.bit();
+  RegList argument_registers = r0.bit() | r1.bit() | r2.bit() | r3.bit();
+  __ stm(db_w, sp, argument_registers | registers_to_retain | lr.bit());
+  // Set frame pointer just above the arguments.
+  __ add(frame_pointer(), sp, Operand(4 * kPointerSize));
+  __ push(r0);  // Make room for "position - 1" constant (value is irrelevant).
+
+  // Check if we have space on the stack for registers.
+  Label stack_limit_hit;
+  Label stack_ok;
+
+  ExternalReference stack_guard_limit =
+      ExternalReference::address_of_stack_guard_limit();
+  __ mov(r0, Operand(stack_guard_limit));
+  __ ldr(r0, MemOperand(r0));
+  __ sub(r0, sp, r0, SetCC);
+  // Handle it if the stack pointer is already below the stack limit.
+  __ b(ls, &stack_limit_hit);
+  // Check if there is room for the variable number of registers above
+  // the stack limit.
+  __ cmp(r0, Operand(num_registers_ * kPointerSize));
+  __ b(hs, &stack_ok);
+  // Exit with OutOfMemory exception. There is not enough space on the stack
+  // for our working registers.
+  __ mov(r0, Operand(EXCEPTION));
+  __ jmp(&exit_label_);
+
+  __ bind(&stack_limit_hit);
+  CallCheckStackGuardState(r0);
+  __ cmp(r0, Operand(0));
+  // If returned value is non-zero, we exit with the returned value as result.
+  __ b(ne, &exit_label_);
+
+  __ bind(&stack_ok);
+
+  // Allocate space on stack for registers.
+  __ sub(sp, sp, Operand(num_registers_ * kPointerSize));
+  // Load string end.
+  __ ldr(end_of_input_address(), MemOperand(frame_pointer(), kInputEnd));
+  // Load input start.
+  __ ldr(r0, MemOperand(frame_pointer(), kInputStart));
+  // Find negative length (offset of start relative to end).
+  __ sub(current_input_offset(), r0, end_of_input_address());
+  // Set r0 to address of char before start of input
+  // (effectively string position -1).
+  __ sub(r0, current_input_offset(), Operand(char_size()));
+  // Store this value in a local variable, for use when clearing
+  // position registers.
+  __ str(r0, MemOperand(frame_pointer(), kInputStartMinusOne));
+  if (num_saved_registers_ > 0) {  // Always is, if generated from a regexp.
+    // Fill saved registers with initial value = start offset - 1
+
+    // Address of register 0.
+    __ add(r1, frame_pointer(), Operand(kRegisterZero));
+    __ mov(r2, Operand(num_saved_registers_));
+    Label init_loop;
+    __ bind(&init_loop);
+    __ str(r0, MemOperand(r1, kPointerSize, NegPostIndex));
+    __ sub(r2, r2, Operand(1), SetCC);
+    __ b(ne, &init_loop);
+  }
+
+  // Initialize backtrack stack pointer.
+  __ ldr(backtrack_stackpointer(), MemOperand(frame_pointer(), kStackHighEnd));
+  // Initialize code pointer register
+  __ mov(code_pointer(), Operand(masm_->CodeObject()));
+  // Load previous char as initial value of current character register.
+  Label at_start;
+  __ ldr(r0, MemOperand(frame_pointer(), kAtStart));
+  __ cmp(r0, Operand(0));
+  __ b(ne, &at_start);
+  LoadCurrentCharacterUnchecked(-1, 1);  // Load previous char.
+  __ jmp(&start_label_);
+  __ bind(&at_start);
+  __ mov(current_character(), Operand('\n'));
+  __ jmp(&start_label_);
+
+
+  // Exit code:
+  if (success_label_.is_linked()) {
+    // Save captures when successful.
+    __ bind(&success_label_);
+    if (num_saved_registers_ > 0) {
+      // copy captures to output
+      __ ldr(r1, MemOperand(frame_pointer(), kInputStart));
+      __ ldr(r0, MemOperand(frame_pointer(), kRegisterOutput));
+      __ sub(r1, end_of_input_address(), r1);
+      // r1 is length of input in bytes.
+      if (mode_ == UC16) {
+        __ mov(r1, Operand(r1, LSR, 1));
+      }
+      // r1 is length of input in characters.
+
+      ASSERT_EQ(0, num_saved_registers_ % 2);
+      // Always an even number of capture registers. This allows us to
+      // unroll the loop once to add an operation between a load of a register
+      // and the following use of that register.
+      for (int i = 0; i < num_saved_registers_; i += 2) {
+        __ ldr(r2, register_location(i));
+        __ ldr(r3, register_location(i + 1));
+        if (mode_ == UC16) {
+          __ add(r2, r1, Operand(r2, ASR, 1));
+          __ add(r3, r1, Operand(r3, ASR, 1));
+        } else {
+          __ add(r2, r1, Operand(r2));
+          __ add(r3, r1, Operand(r3));
+        }
+        __ str(r2, MemOperand(r0, kPointerSize, PostIndex));
+        __ str(r3, MemOperand(r0, kPointerSize, PostIndex));
+      }
+    }
+    __ mov(r0, Operand(SUCCESS));
+  }
+  // Exit and return r0
+  __ bind(&exit_label_);
+  // Skip sp past regexp registers and local variables..
+  __ mov(sp, frame_pointer());
+  // Restore registers r4..r11 and return (restoring lr to pc).
+  __ ldm(ia_w, sp, registers_to_retain | pc.bit());
+
+  // Backtrack code (branch target for conditional backtracks).
+  if (backtrack_label_.is_linked()) {
+    __ bind(&backtrack_label_);
+    Backtrack();
+  }
+
+  Label exit_with_exception;
+
+  // Preempt-code
+  if (check_preempt_label_.is_linked()) {
+    SafeCallTarget(&check_preempt_label_);
+
+    CallCheckStackGuardState(r0);
+    __ cmp(r0, Operand(0));
+    // If returning non-zero, we should end execution with the given
+    // result as return value.
+    __ b(ne, &exit_label_);
+
+    // String might have moved: Reload end of string from frame.
+    __ ldr(end_of_input_address(), MemOperand(frame_pointer(), kInputEnd));
+    SafeReturn();
+  }
+
+  // Backtrack stack overflow code.
+  if (stack_overflow_label_.is_linked()) {
+    SafeCallTarget(&stack_overflow_label_);
+    // Reached if the backtrack-stack limit has been hit.
+
+    Label grow_failed;
+
+    // Call GrowStack(backtrack_stackpointer())
+    int num_arguments = 2;
+    FrameAlign(num_arguments, r0);
+    __ mov(r0, backtrack_stackpointer());
+    __ add(r1, frame_pointer(), Operand(kStackHighEnd));
+    ExternalReference grow_stack =
+      ExternalReference::re_grow_stack();
+    CallCFunction(grow_stack, num_arguments);
+    // If return NULL, we have failed to grow the stack, and
+    // must exit with a stack-overflow exception.
+    __ cmp(r0, Operand(0));
+    __ b(eq, &exit_with_exception);
+    // Otherwise use return value as new stack pointer.
+    __ mov(backtrack_stackpointer(), r0);
+    // Restore saved registers and continue.
+    SafeReturn();
+  }
+
+  if (exit_with_exception.is_linked()) {
+    // If any of the code above needed to exit with an exception.
+    __ bind(&exit_with_exception);
+    // Exit with Result EXCEPTION(-1) to signal thrown exception.
+    __ mov(r0, Operand(EXCEPTION));
+    __ jmp(&exit_label_);
+  }
+
+  CodeDesc code_desc;
+  masm_->GetCode(&code_desc);
+  Handle<Code> code = Factory::NewCode(code_desc,
+                                       NULL,
+                                       Code::ComputeFlags(Code::REGEXP),
+                                       masm_->CodeObject());
+  LOG(RegExpCodeCreateEvent(*code, *source));
+  return Handle<Object>::cast(code);
+}
+
+
+void RegExpMacroAssemblerARM::GoTo(Label* to) {
+  BranchOrBacktrack(al, to);
+}
+
+
+void RegExpMacroAssemblerARM::IfRegisterGE(int reg,
+                                           int comparand,
+                                           Label* if_ge) {
+  __ ldr(r0, register_location(reg));
+  __ cmp(r0, Operand(comparand));
+  BranchOrBacktrack(ge, if_ge);
+}
+
+
+void RegExpMacroAssemblerARM::IfRegisterLT(int reg,
+                                           int comparand,
+                                           Label* if_lt) {
+  __ ldr(r0, register_location(reg));
+  __ cmp(r0, Operand(comparand));
+  BranchOrBacktrack(lt, if_lt);
+}
 
-}}  // namespace v8::internal
 
+void RegExpMacroAssemblerARM::IfRegisterEqPos(int reg,
+                                              Label* if_eq) {
+  __ ldr(r0, register_location(reg));
+  __ cmp(r0, Operand(current_input_offset()));
+  BranchOrBacktrack(eq, if_eq);
+}
+
+
+RegExpMacroAssembler::IrregexpImplementation
+    RegExpMacroAssemblerARM::Implementation() {
+  return kARMImplementation;
+}
+
+
+void RegExpMacroAssemblerARM::LoadCurrentCharacter(int cp_offset,
+                                                   Label* on_end_of_input,
+                                                   bool check_bounds,
+                                                   int characters) {
+  ASSERT(cp_offset >= -1);      // ^ and \b can look behind one character.
+  ASSERT(cp_offset < (1<<30));  // Be sane! (And ensure negation works)
+  if (check_bounds) {
+    CheckPosition(cp_offset + characters - 1, on_end_of_input);
+  }
+  LoadCurrentCharacterUnchecked(cp_offset, characters);
+}
+
+
+void RegExpMacroAssemblerARM::PopCurrentPosition() {
+  Pop(current_input_offset());
+}
+
+
+void RegExpMacroAssemblerARM::PopRegister(int register_index) {
+  Pop(r0);
+  __ str(r0, register_location(register_index));
+}
+
+
+static bool is_valid_memory_offset(int value) {
+  if (value < 0) value = -value;
+  return value < (1<<12);
+}
+
+
+void RegExpMacroAssemblerARM::PushBacktrack(Label* label) {
+  if (label->is_bound()) {
+    int target = label->pos();
+    __ mov(r0, Operand(target + Code::kHeaderSize - kHeapObjectTag));
+  } else {
+    int constant_offset = GetBacktrackConstantPoolEntry();
+    masm_->label_at_put(label, constant_offset);
+    // Reading pc-relative is based on the address 8 bytes ahead of
+    // the current opcode.
+    unsigned int offset_of_pc_register_read =
+      masm_->pc_offset() + Assembler::kPcLoadDelta;
+    int pc_offset_of_constant =
+      constant_offset - offset_of_pc_register_read;
+    ASSERT(pc_offset_of_constant < 0);
+    if (is_valid_memory_offset(pc_offset_of_constant)) {
+      masm_->BlockConstPoolBefore(masm_->pc_offset() + Assembler::kInstrSize);
+      __ ldr(r0, MemOperand(pc, pc_offset_of_constant));
+    } else {
+      // Not a 12-bit offset, so it needs to be loaded from the constant
+      // pool.
+      masm_->BlockConstPoolBefore(
+          masm_->pc_offset() + 2 * Assembler::kInstrSize);
+      __ mov(r0, Operand(pc_offset_of_constant + Assembler::kInstrSize));
+      __ ldr(r0, MemOperand(pc, r0));
+    }
+  }
+  Push(r0);
+  CheckStackLimit();
+}
+
+
+void RegExpMacroAssemblerARM::PushCurrentPosition() {
+  Push(current_input_offset());
+}
+
+
+void RegExpMacroAssemblerARM::PushRegister(int register_index,
+                                           StackCheckFlag check_stack_limit) {
+  __ ldr(r0, register_location(register_index));
+  Push(r0);
+  if (check_stack_limit) CheckStackLimit();
+}
+
+
+void RegExpMacroAssemblerARM::ReadCurrentPositionFromRegister(int reg) {
+  __ ldr(current_input_offset(), register_location(reg));
+}
+
+
+void RegExpMacroAssemblerARM::ReadStackPointerFromRegister(int reg) {
+  __ ldr(backtrack_stackpointer(), register_location(reg));
+  __ ldr(r0, MemOperand(frame_pointer(), kStackHighEnd));
+  __ add(backtrack_stackpointer(), backtrack_stackpointer(), Operand(r0));
+}
+
+
+void RegExpMacroAssemblerARM::SetRegister(int register_index, int to) {
+  ASSERT(register_index >= num_saved_registers_);  // Reserved for positions!
+  __ mov(r0, Operand(to));
+  __ str(r0, register_location(register_index));
+}
+
+
+void RegExpMacroAssemblerARM::Succeed() {
+  __ jmp(&success_label_);
+}
+
+
+void RegExpMacroAssemblerARM::WriteCurrentPositionToRegister(int reg,
+                                                             int cp_offset) {
+  if (cp_offset == 0) {
+    __ str(current_input_offset(), register_location(reg));
+  } else {
+    __ add(r0, current_input_offset(), Operand(cp_offset * char_size()));
+    __ str(r0, register_location(reg));
+  }
+}
+
+
+void RegExpMacroAssemblerARM::ClearRegisters(int reg_from, int reg_to) {
+  ASSERT(reg_from <= reg_to);
+  __ ldr(r0, MemOperand(frame_pointer(), kInputStartMinusOne));
+  for (int reg = reg_from; reg <= reg_to; reg++) {
+    __ str(r0, register_location(reg));
+  }
+}
+
+
+void RegExpMacroAssemblerARM::WriteStackPointerToRegister(int reg) {
+  __ ldr(r1, MemOperand(frame_pointer(), kStackHighEnd));
+  __ sub(r0, backtrack_stackpointer(), r1);
+  __ str(r0, register_location(reg));
+}
+
+
+// Private methods:
+
+void RegExpMacroAssemblerARM::CallCheckStackGuardState(Register scratch) {
+  int num_arguments = 3;
+  FrameAlign(num_arguments, scratch);
+  // RegExp code frame pointer.
+  __ mov(r2, frame_pointer());
+  // Code* of self.
+  __ mov(r1, Operand(masm_->CodeObject()));
+  // r0 becomes return address pointer.
+  ExternalReference stack_guard_check =
+      ExternalReference::re_check_stack_guard_state();
+  CallCFunctionUsingStub(stack_guard_check, num_arguments);
+}
+
+
+// Helper function for reading a value out of a stack frame.
+template <typename T>
+static T& frame_entry(Address re_frame, int frame_offset) {
+  return reinterpret_cast<T&>(Memory::int32_at(re_frame + frame_offset));
+}
+
+
+int RegExpMacroAssemblerARM::CheckStackGuardState(Address* return_address,
+                                                  Code* re_code,
+                                                  Address re_frame) {
+  if (StackGuard::IsStackOverflow()) {
+    Top::StackOverflow();
+    return EXCEPTION;
+  }
+
+  // If not real stack overflow the stack guard was used to interrupt
+  // execution for another purpose.
+
+  // Prepare for possible GC.
+  HandleScope handles;
+  Handle<Code> code_handle(re_code);
+
+  Handle<String> subject(frame_entry<String*>(re_frame, kInputString));
+  // Current string.
+  bool is_ascii = subject->IsAsciiRepresentation();
+
+  ASSERT(re_code->instruction_start() <= *return_address);
+  ASSERT(*return_address <=
+      re_code->instruction_start() + re_code->instruction_size());
+
+  Object* result = Execution::HandleStackGuardInterrupt();
+
+  if (*code_handle != re_code) {  // Return address no longer valid
+    int delta = *code_handle - re_code;
+    // Overwrite the return address on the stack.
+    *return_address += delta;
+  }
+
+  if (result->IsException()) {
+    return EXCEPTION;
+  }
+
+  // String might have changed.
+  if (subject->IsAsciiRepresentation() != is_ascii) {
+    // If we changed between an ASCII and an UC16 string, the specialized
+    // code cannot be used, and we need to restart regexp matching from
+    // scratch (including, potentially, compiling a new version of the code).
+    return RETRY;
+  }
+
+  // Otherwise, the content of the string might have moved. It must still
+  // be a sequential or external string with the same content.
+  // Update the start and end pointers in the stack frame to the current
+  // location (whether it has actually moved or not).
+  ASSERT(StringShape(*subject).IsSequential() ||
+      StringShape(*subject).IsExternal());
+
+  // The original start address of the characters to match.
+  const byte* start_address = frame_entry<const byte*>(re_frame, kInputStart);
+
+  // Find the current start address of the same character at the current string
+  // position.
+  int start_index = frame_entry<int>(re_frame, kStartIndex);
+  const byte* new_address = StringCharacterPosition(*subject, start_index);
+
+  if (start_address != new_address) {
+    // If there is a difference, update the object pointer and start and end
+    // addresses in the RegExp stack frame to match the new value.
+    const byte* end_address = frame_entry<const byte* >(re_frame, kInputEnd);
+    int byte_length = end_address - start_address;
+    frame_entry<const String*>(re_frame, kInputString) = *subject;
+    frame_entry<const byte*>(re_frame, kInputStart) = new_address;
+    frame_entry<const byte*>(re_frame, kInputEnd) = new_address + byte_length;
+  }
+
+  return 0;
+}
+
+
+MemOperand RegExpMacroAssemblerARM::register_location(int register_index) {
+  ASSERT(register_index < (1<<30));
+  if (num_registers_ <= register_index) {
+    num_registers_ = register_index + 1;
+  }
+  return MemOperand(frame_pointer(),
+                    kRegisterZero - register_index * kPointerSize);
+}
+
+
+void RegExpMacroAssemblerARM::CheckPosition(int cp_offset,
+                                            Label* on_outside_input) {
+  __ cmp(current_input_offset(), Operand(-cp_offset * char_size()));
+  BranchOrBacktrack(ge, on_outside_input);
+}
+
+
+void RegExpMacroAssemblerARM::BranchOrBacktrack(Condition condition,
+                                                Label* to) {
+  if (condition == al) {  // Unconditional.
+    if (to == NULL) {
+      Backtrack();
+      return;
+    }
+    __ jmp(to);
+    return;
+  }
+  if (to == NULL) {
+    __ b(condition, &backtrack_label_);
+    return;
+  }
+  __ b(condition, to);
+}
+
+
+void RegExpMacroAssemblerARM::SafeCall(Label* to, Condition cond) {
+  __ bl(to, cond);
+}
+
+
+void RegExpMacroAssemblerARM::SafeReturn() {
+  __ pop(lr);
+  __ add(pc, lr, Operand(masm_->CodeObject()));
+}
+
+
+void RegExpMacroAssemblerARM::SafeCallTarget(Label* name) {
+  __ bind(name);
+  __ sub(lr, lr, Operand(masm_->CodeObject()));
+  __ push(lr);
+}
+
+
+void RegExpMacroAssemblerARM::Push(Register source) {
+  ASSERT(!source.is(backtrack_stackpointer()));
+  __ str(source,
+         MemOperand(backtrack_stackpointer(), kPointerSize, NegPreIndex));
+}
+
+
+void RegExpMacroAssemblerARM::Pop(Register target) {
+  ASSERT(!target.is(backtrack_stackpointer()));
+  __ ldr(target,
+         MemOperand(backtrack_stackpointer(), kPointerSize, PostIndex));
+}
+
+
+void RegExpMacroAssemblerARM::CheckPreemption() {
+  // Check for preemption.
+  ExternalReference stack_guard_limit =
+      ExternalReference::address_of_stack_guard_limit();
+  __ mov(r0, Operand(stack_guard_limit));
+  __ ldr(r0, MemOperand(r0));
+  __ cmp(sp, r0);
+  SafeCall(&check_preempt_label_, ls);
+}
+
+
+void RegExpMacroAssemblerARM::CheckStackLimit() {
+  if (FLAG_check_stack) {
+    ExternalReference stack_limit =
+        ExternalReference::address_of_regexp_stack_limit();
+    __ mov(r0, Operand(stack_limit));
+    __ ldr(r0, MemOperand(r0));
+    __ cmp(backtrack_stackpointer(), Operand(r0));
+    SafeCall(&stack_overflow_label_, ls);
+  }
+}
+
+
+void RegExpMacroAssemblerARM::EmitBacktrackConstantPool() {
+  __ CheckConstPool(false, false);
+  __ BlockConstPoolBefore(
+      masm_->pc_offset() + kBacktrackConstantPoolSize * Assembler::kInstrSize);
+  backtrack_constant_pool_offset_ = masm_->pc_offset();
+  for (int i = 0; i < kBacktrackConstantPoolSize; i++) {
+    __ emit(0);
+  }
+
+  backtrack_constant_pool_capacity_ = kBacktrackConstantPoolSize;
+}
+
+
+int RegExpMacroAssemblerARM::GetBacktrackConstantPoolEntry() {
+  while (backtrack_constant_pool_capacity_ > 0) {
+    int offset = backtrack_constant_pool_offset_;
+    backtrack_constant_pool_offset_ += kPointerSize;
+    backtrack_constant_pool_capacity_--;
+    if (masm_->pc_offset() - offset < 2 * KB) {
+      return offset;
+    }
+  }
+  Label new_pool_skip;
+  __ jmp(&new_pool_skip);
+  EmitBacktrackConstantPool();
+  __ bind(&new_pool_skip);
+  int offset = backtrack_constant_pool_offset_;
+  backtrack_constant_pool_offset_ += kPointerSize;
+  backtrack_constant_pool_capacity_--;
+  return offset;
+}
+
+
+void RegExpMacroAssemblerARM::FrameAlign(int num_arguments, Register scratch) {
+  int frameAlignment = OS::ActivationFrameAlignment();
+  // Up to four simple arguments are passed in registers r0..r3.
+  int stack_passed_arguments = (num_arguments <= 4) ? 0 : num_arguments - 4;
+  if (frameAlignment != 0) {
+    // Make stack end at alignment and make room for num_arguments - 4 words
+    // and the original value of sp.
+    __ mov(scratch, sp);
+    __ sub(sp, sp, Operand((stack_passed_arguments + 1) * kPointerSize));
+    ASSERT(IsPowerOf2(frameAlignment));
+    __ and_(sp, sp, Operand(-frameAlignment));
+    __ str(scratch, MemOperand(sp, stack_passed_arguments * kPointerSize));
+  } else {
+    __ sub(sp, sp, Operand(stack_passed_arguments * kPointerSize));
+  }
+}
+
+
+void RegExpMacroAssemblerARM::CallCFunction(ExternalReference function,
+                                            int num_arguments) {
+  __ mov(r5, Operand(function));
+  // Just call directly. The function called cannot cause a GC, or
+  // allow preemption, so the return address in the link register
+  // stays correct.
+  __ Call(r5);
+  int stack_passed_arguments = (num_arguments <= 4) ? 0 : num_arguments - 4;
+  if (OS::ActivationFrameAlignment() > kIntSize) {
+    __ ldr(sp, MemOperand(sp, stack_passed_arguments * kPointerSize));
+  } else {
+    __ add(sp, sp, Operand(stack_passed_arguments * sizeof(kPointerSize)));
+  }
+  __ mov(code_pointer(), Operand(masm_->CodeObject()));
+}
+
+
+void RegExpMacroAssemblerARM::CallCFunctionUsingStub(
+    ExternalReference function,
+    int num_arguments) {
+  // Must pass all arguments in registers. The stub pushes on the stack.
+  ASSERT(num_arguments <= 4);
+  __ mov(r5, Operand(function));
+  RegExpCEntryStub stub;
+  __ CallStub(&stub);
+  if (OS::ActivationFrameAlignment() != 0) {
+    __ ldr(sp, MemOperand(sp, 0));
+  }
+  __ mov(code_pointer(), Operand(masm_->CodeObject()));
+}
+
+
+void RegExpMacroAssemblerARM::LoadCurrentCharacterUnchecked(int cp_offset,
+                                                            int characters) {
+  Register offset = current_input_offset();
+  if (cp_offset != 0) {
+    __ add(r0, current_input_offset(), Operand(cp_offset * char_size()));
+    offset = r0;
+  }
+  // We assume that we cannot do unaligned loads on ARM, so this function
+  // must only be used to load a single character at a time.
+  ASSERT(characters == 1);
+  if (mode_ == ASCII) {
+    __ ldrb(current_character(), MemOperand(end_of_input_address(), offset));
+  } else {
+    ASSERT(mode_ == UC16);
+    __ ldrh(current_character(), MemOperand(end_of_input_address(), offset));
+  }
+}
+
+
+void RegExpCEntryStub::Generate(MacroAssembler* masm_) {
+  int stack_alignment = OS::ActivationFrameAlignment();
+  if (stack_alignment < kPointerSize) stack_alignment = kPointerSize;
+  // Stack is already aligned for call, so decrement by alignment
+  // to make room for storing the link register.
+  __ str(lr, MemOperand(sp, stack_alignment, NegPreIndex));
+  __ mov(r0, sp);
+  __ Call(r5);
+  __ ldr(pc, MemOperand(sp, stack_alignment, PostIndex));
+}
+
+#undef __
+
+#endif  // V8_NATIVE_REGEXP
+
+}}  // namespace v8::internal
diff --git a/deps/v8/src/arm/regexp-macro-assembler-arm.h b/deps/v8/src/arm/regexp-macro-assembler-arm.h
index de5518379..0711ac19f 100644
--- a/deps/v8/src/arm/regexp-macro-assembler-arm.h
+++ b/deps/v8/src/arm/regexp-macro-assembler-arm.h
@@ -31,12 +31,238 @@
 namespace v8 {
 namespace internal {
 
+
+#ifndef V8_NATIVE_REGEXP
 class RegExpMacroAssemblerARM: public RegExpMacroAssembler {
  public:
   RegExpMacroAssemblerARM();
   virtual ~RegExpMacroAssemblerARM();
 };
 
+#else
+class RegExpMacroAssemblerARM: public NativeRegExpMacroAssembler {
+ public:
+  RegExpMacroAssemblerARM(Mode mode, int registers_to_save);
+  virtual ~RegExpMacroAssemblerARM();
+  virtual int stack_limit_slack();
+  virtual void AdvanceCurrentPosition(int by);
+  virtual void AdvanceRegister(int reg, int by);
+  virtual void Backtrack();
+  virtual void Bind(Label* label);
+  virtual void CheckAtStart(Label* on_at_start);
+  virtual void CheckCharacter(uint32_t c, Label* on_equal);
+  virtual void CheckCharacterAfterAnd(uint32_t c,
+                                      uint32_t mask,
+                                      Label* on_equal);
+  virtual void CheckCharacterGT(uc16 limit, Label* on_greater);
+  virtual void CheckCharacterLT(uc16 limit, Label* on_less);
+  virtual void CheckCharacters(Vector<const uc16> str,
+                               int cp_offset,
+                               Label* on_failure,
+                               bool check_end_of_string);
+  // A "greedy loop" is a loop that is both greedy and with a simple
+  // body. It has a particularly simple implementation.
+  virtual void CheckGreedyLoop(Label* on_tos_equals_current_position);
+  virtual void CheckNotAtStart(Label* on_not_at_start);
+  virtual void CheckNotBackReference(int start_reg, Label* on_no_match);
+  virtual void CheckNotBackReferenceIgnoreCase(int start_reg,
+                                               Label* on_no_match);
+  virtual void CheckNotRegistersEqual(int reg1, int reg2, Label* on_not_equal);
+  virtual void CheckNotCharacter(uint32_t c, Label* on_not_equal);
+  virtual void CheckNotCharacterAfterAnd(uint32_t c,
+                                         uint32_t mask,
+                                         Label* on_not_equal);
+  virtual void CheckNotCharacterAfterMinusAnd(uc16 c,
+                                              uc16 minus,
+                                              uc16 mask,
+                                              Label* on_not_equal);
+  // Checks whether the given offset from the current position is before
+  // the end of the string.
+  virtual void CheckPosition(int cp_offset, Label* on_outside_input);
+  virtual bool CheckSpecialCharacterClass(uc16 type,
+                                          int cp_offset,
+                                          bool check_offset,
+                                          Label* on_no_match);
+  virtual void Fail();
+  virtual Handle<Object> GetCode(Handle<String> source);
+  virtual void GoTo(Label* label);
+  virtual void IfRegisterGE(int reg, int comparand, Label* if_ge);
+  virtual void IfRegisterLT(int reg, int comparand, Label* if_lt);
+  virtual void IfRegisterEqPos(int reg, Label* if_eq);
+  virtual IrregexpImplementation Implementation();
+  virtual void LoadCurrentCharacter(int cp_offset,
+                                    Label* on_end_of_input,
+                                    bool check_bounds = true,
+                                    int characters = 1);
+  virtual void PopCurrentPosition();
+  virtual void PopRegister(int register_index);
+  virtual void PushBacktrack(Label* label);
+  virtual void PushCurrentPosition();
+  virtual void PushRegister(int register_index,
+                            StackCheckFlag check_stack_limit);
+  virtual void ReadCurrentPositionFromRegister(int reg);
+  virtual void ReadStackPointerFromRegister(int reg);
+  virtual void SetRegister(int register_index, int to);
+  virtual void Succeed();
+  virtual void WriteCurrentPositionToRegister(int reg, int cp_offset);
+  virtual void ClearRegisters(int reg_from, int reg_to);
+  virtual void WriteStackPointerToRegister(int reg);
+
+  // Called from RegExp if the stack-guard is triggered.
+  // If the code object is relocated, the return address is fixed before
+  // returning.
+  static int CheckStackGuardState(Address* return_address,
+                                  Code* re_code,
+                                  Address re_frame);
+ private:
+  // Offsets from frame_pointer() of function parameters and stored registers.
+  static const int kFramePointer = 0;
+
+  // Above the frame pointer - Stored registers and stack passed parameters.
+  // Register 4..11.
+  static const int kStoredRegisters = kFramePointer;
+  // Return address (stored from link register, read into pc on return).
+  static const int kReturnAddress = kStoredRegisters + 8 * kPointerSize;
+  // Stack parameters placed by caller.
+  static const int kRegisterOutput = kReturnAddress + kPointerSize;
+  static const int kAtStart = kRegisterOutput + kPointerSize;
+  static const int kStackHighEnd = kAtStart + kPointerSize;
+
+  // Below the frame pointer.
+  // Register parameters stored by setup code.
+  static const int kInputEnd = kFramePointer - kPointerSize;
+  static const int kInputStart = kInputEnd - kPointerSize;
+  static const int kStartIndex = kInputStart - kPointerSize;
+  static const int kInputString = kStartIndex - kPointerSize;
+  // When adding local variables remember to push space for them in
+  // the frame in GetCode.
+  static const int kInputStartMinusOne = kInputString - kPointerSize;
+  // First register address. Following registers are below it on the stack.
+  static const int kRegisterZero = kInputStartMinusOne - kPointerSize;
+
+  // Initial size of code buffer.
+  static const size_t kRegExpCodeSize = 1024;
+
+  static const int kBacktrackConstantPoolSize = 4;
+
+  // Load a number of characters at the given offset from the
+  // current position, into the current-character register.
+  void LoadCurrentCharacterUnchecked(int cp_offset, int character_count);
+
+  // Check whether preemption has been requested.
+  void CheckPreemption();
+
+  // Check whether we are exceeding the stack limit on the backtrack stack.
+  void CheckStackLimit();
+
+  void EmitBacktrackConstantPool();
+  int GetBacktrackConstantPoolEntry();
+
+
+  // Generate a call to CheckStackGuardState.
+  void CallCheckStackGuardState(Register scratch);
+
+  // The ebp-relative location of a regexp register.
+  MemOperand register_location(int register_index);
+
+  // Register holding the current input position as negative offset from
+  // the end of the string.
+  inline Register current_input_offset() { return r6; }
+
+  // The register containing the current character after LoadCurrentCharacter.
+  inline Register current_character() { return r7; }
+
+  // Register holding address of the end of the input string.
+  inline Register end_of_input_address() { return r10; }
+
+  // Register holding the frame address. Local variables, parameters and
+  // regexp registers are addressed relative to this.
+  inline Register frame_pointer() { return fp; }
+
+  // The register containing the backtrack stack top. Provides a meaningful
+  // name to the register.
+  inline Register backtrack_stackpointer() { return r8; }
+
+  // Register holding pointer to the current code object.
+  inline Register code_pointer() { return r5; }
+
+  // Byte size of chars in the string to match (decided by the Mode argument)
+  inline int char_size() { return static_cast<int>(mode_); }
+
+  // Equivalent to a conditional branch to the label, unless the label
+  // is NULL, in which case it is a conditional Backtrack.
+  void BranchOrBacktrack(Condition condition, Label* to);
+
+  // Call and return internally in the generated code in a way that
+  // is GC-safe (i.e., doesn't leave absolute code addresses on the stack)
+  inline void SafeCall(Label* to, Condition cond = al);
+  inline void SafeReturn();
+  inline void SafeCallTarget(Label* name);
+
+  // Pushes the value of a register on the backtrack stack. Decrements the
+  // stack pointer by a word size and stores the register's value there.
+  inline void Push(Register source);
+
+  // Pops a value from the backtrack stack. Reads the word at the stack pointer
+  // and increments it by a word size.
+  inline void Pop(Register target);
+
+  // Before calling a C-function from generated code, align arguments on stack.
+  // After aligning the frame, non-register arguments must be stored in
+  // sp[0], sp[4], etc., not pushed. The argument count assumes all arguments
+  // are word sized.
+  // Some compilers/platforms require the stack to be aligned when calling
+  // C++ code.
+  // Needs a scratch register to do some arithmetic. This register will be
+  // trashed.
+  inline void FrameAlign(int num_arguments, Register scratch);
+
+  // Calls a C function and cleans up the space for arguments allocated
+  // by FrameAlign. The called function is not allowed to trigger a garbage
+  // collection.
+  inline void CallCFunction(ExternalReference function,
+                            int num_arguments);
+
+  // Calls a C function and cleans up the frame alignment done by
+  // by FrameAlign. The called function *is* allowed to trigger a garbage
+  // collection, but may not take more than four arguments (no arguments
+  // passed on the stack), and the first argument will be a pointer to the
+  // return address.
+  inline void CallCFunctionUsingStub(ExternalReference function,
+                                     int num_arguments);
+
+
+  MacroAssembler* masm_;
+
+  // Which mode to generate code for (ASCII or UC16).
+  Mode mode_;
+
+  // One greater than maximal register index actually used.
+  int num_registers_;
+
+  // Number of registers to output at the end (the saved registers
+  // are always 0..num_saved_registers_-1)
+  int num_saved_registers_;
+
+  // Manage a small pre-allocated pool for writing label targets
+  // to for pushing backtrack addresses.
+  int backtrack_constant_pool_offset_;
+  int backtrack_constant_pool_capacity_;
+
+  // Labels used internally.
+  Label entry_label_;
+  Label start_label_;
+  Label success_label_;
+  Label backtrack_label_;
+  Label exit_label_;
+  Label check_preempt_label_;
+  Label stack_overflow_label_;
+};
+
+
+#endif  // V8_NATIVE_REGEXP
+
+
 }}  // namespace v8::internal
 
 #endif  // V8_ARM_REGEXP_MACRO_ASSEMBLER_ARM_H_
diff --git a/deps/v8/src/arm/simulator-arm.cc b/deps/v8/src/arm/simulator-arm.cc
index e5500aad5..e258e5a68 100644
--- a/deps/v8/src/arm/simulator-arm.cc
+++ b/deps/v8/src/arm/simulator-arm.cc
@@ -26,7 +26,7 @@
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 #include <stdlib.h>
-
+#include <cstdarg>
 #include "v8.h"
 
 #include "disasm.h"
@@ -598,7 +598,7 @@ uint16_t Simulator::ReadHU(int32_t addr, Instr* instr) {
     uint16_t* ptr = reinterpret_cast<uint16_t*>(addr);
     return *ptr;
   }
-  PrintF("Unaligned read at %x, pc=%p\n", addr, instr);
+  PrintF("Unaligned unsigned halfword read at %x, pc=%p\n", addr, instr);
   UNIMPLEMENTED();
   return 0;
 }
@@ -609,7 +609,7 @@ int16_t Simulator::ReadH(int32_t addr, Instr* instr) {
     int16_t* ptr = reinterpret_cast<int16_t*>(addr);
     return *ptr;
   }
-  PrintF("Unaligned read at %x\n", addr);
+  PrintF("Unaligned signed halfword read at %x\n", addr);
   UNIMPLEMENTED();
   return 0;
 }
@@ -621,7 +621,7 @@ void Simulator::WriteH(int32_t addr, uint16_t value, Instr* instr) {
     *ptr = value;
     return;
   }
-  PrintF("Unaligned write at %x, pc=%p\n", addr, instr);
+  PrintF("Unaligned unsigned halfword write at %x, pc=%p\n", addr, instr);
   UNIMPLEMENTED();
 }
 
@@ -632,7 +632,7 @@ void Simulator::WriteH(int32_t addr, int16_t value, Instr* instr) {
     *ptr = value;
     return;
   }
-  PrintF("Unaligned write at %x, pc=%p\n", addr, instr);
+  PrintF("Unaligned halfword write at %x, pc=%p\n", addr, instr);
   UNIMPLEMENTED();
 }
 
@@ -1051,7 +1051,6 @@ void Simulator::SoftwareInterrupt(Instr* instr) {
         }
         set_register(r0, lo_res);
         set_register(r1, hi_res);
-        set_register(r0, result);
       }
       set_register(lr, saved_lr);
       set_pc(get_register(lr));
@@ -1417,8 +1416,12 @@ void Simulator::DecodeType01(Instr* instr) {
 
       case CMN: {
         if (instr->HasS()) {
-          Format(instr, "cmn'cond 'rn, 'shift_rm");
-          Format(instr, "cmn'cond 'rn, 'imm");
+          // Format(instr, "cmn'cond 'rn, 'shift_rm");
+          // Format(instr, "cmn'cond 'rn, 'imm");
+          alu_out = rn_val + shifter_operand;
+          SetNZFlags(alu_out);
+          SetCFlag(!CarryFrom(rn_val, shifter_operand));
+          SetVFlag(OverflowFrom(alu_out, rn_val, shifter_operand, true));
         } else {
           ASSERT(type == 0);
           int rm = instr->RmField();
@@ -1567,6 +1570,7 @@ void Simulator::DecodeType2(Instr* instr) {
 
 
 void Simulator::DecodeType3(Instr* instr) {
+  ASSERT(instr->Bit(4) == 0);
   int rd = instr->RdField();
   int rn = instr->RnField();
   int32_t rn_val = get_register(rn);
@@ -1606,7 +1610,12 @@ void Simulator::DecodeType3(Instr* instr) {
     }
   }
   if (instr->HasB()) {
-    UNIMPLEMENTED();
+    if (instr->HasL()) {
+      uint8_t byte = ReadB(addr);
+      set_register(rd, byte);
+    } else {
+      UNIMPLEMENTED();
+    }
   } else {
     if (instr->HasL()) {
       set_register(rd, ReadW(addr, instr));
@@ -1631,12 +1640,13 @@ void Simulator::DecodeType4(Instr* instr) {
 
 void Simulator::DecodeType5(Instr* instr) {
   // Format(instr, "b'l'cond 'target");
-  int off = (instr->SImmed24Field() << 2) + 8;
-  intptr_t pc = get_pc();
+  int off = (instr->SImmed24Field() << 2);
+  intptr_t pc_address = get_pc();
   if (instr->HasLink()) {
-    set_register(lr, pc + Instr::kInstrSize);
+    set_register(lr, pc_address + Instr::kInstrSize);
   }
-  set_pc(pc+off);
+  int pc_reg = get_register(pc);
+  set_pc(pc_reg + off);
 }
 
 
@@ -1655,14 +1665,75 @@ void Simulator::DecodeType7(Instr* instr) {
 }
 
 
+void Simulator::DecodeUnconditional(Instr* instr) {
+  if (instr->Bits(7, 4) == 0x0B && instr->Bits(27, 25) == 0 && instr->HasL()) {
+    // Load halfword instruction, either register or immediate offset.
+    int rd = instr->RdField();
+    int rn = instr->RnField();
+    int32_t rn_val = get_register(rn);
+    int32_t addr = 0;
+    int32_t offset;
+    if (instr->Bit(22) == 0) {
+      // Register offset.
+      int rm = instr->RmField();
+      offset = get_register(rm);
+    } else {
+      // Immediate offset
+      offset = instr->Bits(3, 0) + (instr->Bits(11, 8) << 4);
+    }
+    switch (instr->PUField()) {
+      case 0: {
+        // Post index, negative.
+        ASSERT(!instr->HasW());
+        addr = rn_val;
+        rn_val -= offset;
+        set_register(rn, rn_val);
+        break;
+      }
+      case 1: {
+        // Post index, positive.
+        ASSERT(!instr->HasW());
+        addr = rn_val;
+        rn_val += offset;
+        set_register(rn, rn_val);
+        break;
+      }
+      case 2: {
+        // Pre index or offset, negative.
+        rn_val -= offset;
+        addr = rn_val;
+        if (instr->HasW()) {
+          set_register(rn, rn_val);
+        }
+        break;
+      }
+      case 3: {
+        // Pre index or offset, positive.
+        rn_val += offset;
+        addr = rn_val;
+        if (instr->HasW()) {
+          set_register(rn, rn_val);
+        }
+        break;
+      }
+      default: {
+        // The PU field is a 2-bit field.
+        UNREACHABLE();
+        break;
+      }
+    }
+    // Not sign extending, so load as unsigned.
+    uint16_t halfword = ReadH(addr, instr);
+    set_register(rd, halfword);
+  } else {
+    UNIMPLEMENTED();
+  }
+}
+
+
 // Executes the current instruction.
 void Simulator::InstructionDecode(Instr* instr) {
   pc_modified_ = false;
-  if (instr->ConditionField() == special_condition) {
-    Debugger dbg(this);
-    dbg.Stop(instr);
-    return;
-  }
   if (::v8::internal::FLAG_trace_sim) {
     disasm::NameConverter converter;
     disasm::Disassembler dasm(converter);
@@ -1672,7 +1743,9 @@ void Simulator::InstructionDecode(Instr* instr) {
                            reinterpret_cast<byte*>(instr));
     PrintF("  0x%x  %s\n", instr, buffer.start());
   }
-  if (ConditionallyExecute(instr)) {
+  if (instr->ConditionField() == special_condition) {
+    DecodeUnconditional(instr);
+  } else if (ConditionallyExecute(instr)) {
     switch (instr->TypeField()) {
       case 0:
       case 1: {
@@ -1748,19 +1821,35 @@ void Simulator::Execute() {
 }
 
 
-Object* Simulator::Call(int32_t entry, int32_t p0, int32_t p1, int32_t p2,
-                        int32_t p3, int32_t p4) {
-  // Setup parameters
-  set_register(r0, p0);
-  set_register(r1, p1);
-  set_register(r2, p2);
-  set_register(r3, p3);
-  intptr_t* stack_pointer = reinterpret_cast<intptr_t*>(get_register(sp));
-  *(--stack_pointer) = p4;
-  set_register(sp, reinterpret_cast<int32_t>(stack_pointer));
+int32_t Simulator::Call(byte* entry, int argument_count, ...) {
+  va_list parameters;
+  va_start(parameters, argument_count);
+  // Setup arguments
+
+  // First four arguments passed in registers.
+  ASSERT(argument_count >= 4);
+  set_register(r0, va_arg(parameters, int32_t));
+  set_register(r1, va_arg(parameters, int32_t));
+  set_register(r2, va_arg(parameters, int32_t));
+  set_register(r3, va_arg(parameters, int32_t));
+
+  // Remaining arguments passed on stack.
+  int original_stack = get_register(sp);
+  // Compute position of stack on entry to generated code.
+  int entry_stack = (original_stack - (argument_count - 4) * sizeof(int32_t));
+  if (OS::ActivationFrameAlignment() != 0) {
+    entry_stack &= -OS::ActivationFrameAlignment();
+  }
+  // Store remaining arguments on stack, from low to high memory.
+  intptr_t* stack_argument = reinterpret_cast<intptr_t*>(entry_stack);
+  for (int i = 4; i < argument_count; i++) {
+    stack_argument[i - 4] = va_arg(parameters, int32_t);
+  }
+  va_end(parameters);
+  set_register(sp, entry_stack);
 
   // Prepare to execute the code at entry
-  set_register(pc, entry);
+  set_register(pc, reinterpret_cast<int32_t>(entry));
   // Put down marker for end of simulation. The simulator will stop simulation
   // when the PC reaches this value. By saving the "end simulation" value into
   // the LR the simulation stops when returning to this call point.
@@ -1794,14 +1883,14 @@ Object* Simulator::Call(int32_t entry, int32_t p0, int32_t p1, int32_t p2,
   Execute();
 
   // Check that the callee-saved registers have been preserved.
-  CHECK_EQ(get_register(r4), callee_saved_value);
-  CHECK_EQ(get_register(r5), callee_saved_value);
-  CHECK_EQ(get_register(r6), callee_saved_value);
-  CHECK_EQ(get_register(r7), callee_saved_value);
-  CHECK_EQ(get_register(r8), callee_saved_value);
-  CHECK_EQ(get_register(r9), callee_saved_value);
-  CHECK_EQ(get_register(r10), callee_saved_value);
-  CHECK_EQ(get_register(r11), callee_saved_value);
+  CHECK_EQ(callee_saved_value, get_register(r4));
+  CHECK_EQ(callee_saved_value, get_register(r5));
+  CHECK_EQ(callee_saved_value, get_register(r6));
+  CHECK_EQ(callee_saved_value, get_register(r7));
+  CHECK_EQ(callee_saved_value, get_register(r8));
+  CHECK_EQ(callee_saved_value, get_register(r9));
+  CHECK_EQ(callee_saved_value, get_register(r10));
+  CHECK_EQ(callee_saved_value, get_register(r11));
 
   // Restore callee-saved registers with the original value.
   set_register(r4, r4_val);
@@ -1813,8 +1902,12 @@ Object* Simulator::Call(int32_t entry, int32_t p0, int32_t p1, int32_t p2,
   set_register(r10, r10_val);
   set_register(r11, r11_val);
 
-  int result = get_register(r0);
-  return reinterpret_cast<Object*>(result);
+  // Pop stack passed arguments.
+  CHECK_EQ(entry_stack, get_register(sp));
+  set_register(sp, original_stack);
+
+  int32_t result = get_register(r0);
+  return result;
 }
 
 } }  // namespace assembler::arm
diff --git a/deps/v8/src/arm/simulator-arm.h b/deps/v8/src/arm/simulator-arm.h
index 15b92a5f8..3917d6a5a 100644
--- a/deps/v8/src/arm/simulator-arm.h
+++ b/deps/v8/src/arm/simulator-arm.h
@@ -40,7 +40,7 @@
 
 // When running without a simulator we call the entry directly.
 #define CALL_GENERATED_CODE(entry, p0, p1, p2, p3, p4) \
-  reinterpret_cast<Object*>(entry(p0, p1, p2, p3, p4))
+  (entry(p0, p1, p2, p3, p4))
 
 // Calculated the stack limit beyond which we will throw stack overflow errors.
 // This macro must be called from a C++ method. It relies on being able to take
@@ -49,13 +49,20 @@
 #define GENERATED_CODE_STACK_LIMIT(limit) \
   (reinterpret_cast<uintptr_t>(this) - limit)
 
+
+// Call the generated regexp code directly. The entry function pointer should
+// expect seven int/pointer sized arguments and return an int.
+#define CALL_GENERATED_REGEXP_CODE(entry, p0, p1, p2, p3, p4, p5, p6) \
+  entry(p0, p1, p2, p3, p4, p5, p6)
+
 #else  // defined(__arm__)
 
 // When running with the simulator transition into simulated execution at this
 // point.
 #define CALL_GENERATED_CODE(entry, p0, p1, p2, p3, p4) \
-  assembler::arm::Simulator::current()->Call((int32_t)entry, (int32_t)p0, \
-    (int32_t)p1, (int32_t)p2, (int32_t)p3, (int32_t)p4)
+  reinterpret_cast<Object*>( \
+      assembler::arm::Simulator::current()->Call(FUNCTION_ADDR(entry), 5, \
+                                                 p0, p1, p2, p3, p4))
 
 // The simulator has its own stack. Thus it has a different stack limit from
 // the C-based native code.
@@ -63,6 +70,10 @@
   (assembler::arm::Simulator::current()->StackLimit())
 
 
+#define CALL_GENERATED_REGEXP_CODE(entry, p0, p1, p2, p3, p4, p5, p6) \
+  assembler::arm::Simulator::current()->Call( \
+    FUNCTION_ADDR(entry), 7, p0, p1, p2, p3, p4, p5, p6)
+
 #include "constants-arm.h"
 
 
@@ -109,11 +120,10 @@ class Simulator {
   // Call on program start.
   static void Initialize();
 
-  // V8 generally calls into generated code with 5 parameters. This is a
-  // convenience function, which sets up the simulator state and grabs the
-  // result on return.
-  v8::internal::Object* Call(int32_t entry, int32_t p0, int32_t p1,
-                             int32_t p2, int32_t p3, int32_t p4);
+  // V8 generally calls into generated JS code with 5 parameters and into
+  // generated RegExp code with 7 parameters. This is a convenience function,
+  // which sets up the simulator state and grabs the result on return.
+  int32_t Call(byte* entry, int argument_count, ...);
 
  private:
   enum special_values {
@@ -174,6 +184,7 @@ class Simulator {
   void DecodeType5(Instr* instr);
   void DecodeType6(Instr* instr);
   void DecodeType7(Instr* instr);
+  void DecodeUnconditional(Instr* instr);
 
   // Executes one instruction.
   void InstructionDecode(Instr* instr);
diff --git a/deps/v8/src/arm/stub-cache-arm.cc b/deps/v8/src/arm/stub-cache-arm.cc
index 03e077940..745b541e5 100644
--- a/deps/v8/src/arm/stub-cache-arm.cc
+++ b/deps/v8/src/arm/stub-cache-arm.cc
@@ -791,7 +791,7 @@ Object* CallStubCompiler::CompileCallGlobal(JSObject* object,
   __ ldr(cp, FieldMemOperand(r1, JSFunction::kContextOffset));
 
   // Jump to the cached code (tail call).
-  __ IncrementCounter(&Counters::call_global_inline, 1, r1, r3);
+  __ IncrementCounter(&Counters::call_global_inline, 1, r2, r3);
   ASSERT(function->is_compiled());
   Handle<Code> code(function->code());
   ParameterCount expected(function->shared()->formal_parameter_count());
@@ -1342,6 +1342,18 @@ Object* KeyedStoreStubCompiler::CompileStoreField(JSObject* object,
 }
 
 
+Object* ConstructStubCompiler::CompileConstructStub(
+    SharedFunctionInfo* shared) {
+  // Not implemented yet - just jump to generic stub.
+  Code* code = Builtins::builtin(Builtins::JSConstructStubGeneric);
+  Handle<Code> generic_construct_stub(code);
+  __ Jump(generic_construct_stub, RelocInfo::CODE_TARGET);
+
+  // Return the generated code.
+  return GetCode();
+}
+
+
 #undef __
 
 } }  // namespace v8::internal
diff --git a/deps/v8/src/arm/virtual-frame-arm.cc b/deps/v8/src/arm/virtual-frame-arm.cc
index 91952f375..5b5c870ae 100644
--- a/deps/v8/src/arm/virtual-frame-arm.cc
+++ b/deps/v8/src/arm/virtual-frame-arm.cc
@@ -102,7 +102,8 @@ void VirtualFrame::Enter() {
 #ifdef DEBUG
   // Verify that r1 contains a JS function.  The following code relies
   // on r2 being available for use.
-  { Label map_check, done;
+  if (FLAG_debug_code) {
+    Label map_check, done;
     __ tst(r1, Operand(kSmiTagMask));
     __ b(ne, &map_check);
     __ stop("VirtualFrame::Enter - r1 is not a function (smi check).");
@@ -140,9 +141,26 @@ void VirtualFrame::AllocateStackSlots() {
     Adjust(count);
       // Initialize stack slots with 'undefined' value.
     __ LoadRoot(ip, Heap::kUndefinedValueRootIndex);
-    for (int i = 0; i < count; i++) {
-      __ push(ip);
-    }
+  }
+  if (FLAG_check_stack) {
+    __ LoadRoot(r2, Heap::kStackLimitRootIndex);
+  }
+  for (int i = 0; i < count; i++) {
+    __ push(ip);
+  }
+  if (FLAG_check_stack) {
+    // Put the lr setup instruction in the delay slot.  The 'sizeof(Instr)' is
+    // added to the implicit 8 byte offset that always applies to operations
+    // with pc and gives a return address 12 bytes down.
+    masm()->add(lr, pc, Operand(sizeof(Instr)));
+    masm()->cmp(sp, Operand(r2));
+    StackCheckStub stub;
+    // Call the stub if lower.
+    masm()->mov(pc,
+                Operand(reinterpret_cast<intptr_t>(stub.GetCode().location()),
+                        RelocInfo::CODE_TARGET),
+                LeaveCC,
+                lo);
   }
 }
 
diff --git a/deps/v8/src/assembler.cc b/deps/v8/src/assembler.cc
index 546490ee3..3563ebd2e 100644
--- a/deps/v8/src/assembler.cc
+++ b/deps/v8/src/assembler.cc
@@ -42,6 +42,20 @@
 #include "serialize.h"
 #include "stub-cache.h"
 #include "regexp-stack.h"
+#include "ast.h"
+#include "regexp-macro-assembler.h"
+// Include native regexp-macro-assembler.
+#ifdef V8_NATIVE_REGEXP
+#if V8_TARGET_ARCH_IA32
+#include "ia32/regexp-macro-assembler-ia32.h"
+#elif V8_TARGET_ARCH_X64
+#include "x64/regexp-macro-assembler-x64.h"
+#elif V8_TARGET_ARCH_ARM
+#include "arm/regexp-macro-assembler-arm.h"
+#else  // Unknown architecture.
+#error "Unknown architecture."
+#endif  // Target architecture.
+#endif  // V8_NATIVE_REGEXP
 
 namespace v8 {
 namespace internal {
@@ -597,6 +611,34 @@ ExternalReference ExternalReference::new_space_allocation_limit_address() {
   return ExternalReference(Heap::NewSpaceAllocationLimitAddress());
 }
 
+#ifdef V8_NATIVE_REGEXP
+
+ExternalReference ExternalReference::re_check_stack_guard_state() {
+  Address function;
+#ifdef V8_TARGET_ARCH_X64
+  function = FUNCTION_ADDR(RegExpMacroAssemblerX64::CheckStackGuardState);
+#elif V8_TARGET_ARCH_IA32
+  function = FUNCTION_ADDR(RegExpMacroAssemblerIA32::CheckStackGuardState);
+#elif V8_TARGET_ARCH_ARM
+  function = FUNCTION_ADDR(RegExpMacroAssemblerARM::CheckStackGuardState);
+#else
+  UNREACHABLE("Unexpected architecture");
+#endif
+  return ExternalReference(Redirect(function));
+}
+
+ExternalReference ExternalReference::re_grow_stack() {
+  return ExternalReference(
+      Redirect(FUNCTION_ADDR(NativeRegExpMacroAssembler::GrowStack)));
+}
+
+ExternalReference ExternalReference::re_case_insensitive_compare_uc16() {
+  return ExternalReference(Redirect(
+      FUNCTION_ADDR(NativeRegExpMacroAssembler::CaseInsensitiveCompareUC16)));
+}
+
+#endif
+
 
 static double add_two_doubles(double x, double y) {
   return x + y;
diff --git a/deps/v8/src/assembler.h b/deps/v8/src/assembler.h
index e217918ce..827389a1b 100644
--- a/deps/v8/src/assembler.h
+++ b/deps/v8/src/assembler.h
@@ -431,6 +431,19 @@ class ExternalReference BASE_EMBEDDED {
   static ExternalReference debug_step_in_fp_address();
 #endif
 
+#ifdef V8_NATIVE_REGEXP
+  // C functions called from RegExp generated code.
+
+  // Function NativeRegExpMacroAssembler::CaseInsensitiveCompareUC16()
+  static ExternalReference re_case_insensitive_compare_uc16();
+
+  // Function RegExpMacroAssembler*::CheckStackGuardState()
+  static ExternalReference re_check_stack_guard_state();
+
+  // Function NativeRegExpMacroAssembler::GrowStack()
+  static ExternalReference re_grow_stack();
+#endif
+
   // This lets you register a function that rewrites all external references.
   // Used by the ARM simulator to catch calls to external references.
   static void set_redirector(ExternalReferenceRedirector* redirector) {
diff --git a/deps/v8/src/builtins.cc b/deps/v8/src/builtins.cc
index dbd18f82a..4262dd2a8 100644
--- a/deps/v8/src/builtins.cc
+++ b/deps/v8/src/builtins.cc
@@ -28,6 +28,7 @@
 #include "v8.h"
 
 #include "api.h"
+#include "arguments.h"
 #include "bootstrapper.h"
 #include "builtins.h"
 #include "ic-inl.h"
@@ -47,17 +48,13 @@ namespace internal {
 //   BUILTIN_END
 //
 // In the body of the builtin function, the variable 'receiver' is visible.
-// The arguments can be accessed through:
+// The arguments can be accessed through the Arguments object args.
 //
-//   BUILTIN_ARG(0): Receiver (also available as 'receiver')
-//   BUILTIN_ARG(1): First argument
+//   args[0]: Receiver (also available as 'receiver')
+//   args[1]: First argument
 //     ...
-//   BUILTIN_ARG(n): Last argument
-//
-// and they evaluate to undefined values if too few arguments were
-// passed to the builtin function invocation.
-//
-// __argc__ is the number of arguments including the receiver.
+//   args[n]: Last argument
+//   args.length(): Number of arguments including the receiver.
 // ----------------------------------------------------------------------------
 
 
@@ -65,21 +62,8 @@ namespace internal {
 // builtin was invoked as a constructor as part of the
 // arguments. Maybe we also want to pass the called function?
 #define BUILTIN(name)                                                   \
-  static Object* Builtin_##name(int __argc__, Object** __argv__) {      \
-    Handle<Object> receiver(&__argv__[0]);
-
-
-// Use an inline function to avoid evaluating the index (n) more than
-// once in the BUILTIN_ARG macro.
-static inline Object* __builtin_arg__(int n, int argc, Object** argv) {
-  ASSERT(n >= 0);
-  return (argc > n) ? argv[-n] : Heap::undefined_value();
-}
-
-
-// NOTE: Argument 0 is the receiver. The first 'real' argument is
-// argument 1 - BUILTIN_ARG(1).
-#define BUILTIN_ARG(n) (__builtin_arg__(n, __argc__, __argv__))
+  static Object* Builtin_##name(Arguments args) {      \
+    Handle<Object> receiver = args.at<Object>(0);
 
 
 #define BUILTIN_END                             \
@@ -168,8 +152,8 @@ BUILTIN(ArrayCode) {
 
   // Optimize the case where there is one argument and the argument is a
   // small smi.
-  if (__argc__ == 2) {
-    Object* obj = BUILTIN_ARG(1);
+  if (args.length() == 2) {
+    Object* obj = args[1];
     if (obj->IsSmi()) {
       int len = Smi::cast(obj)->value();
       if (len >= 0 && len < JSObject::kInitialMaxFastElementArray) {
@@ -182,14 +166,14 @@ BUILTIN(ArrayCode) {
     // Take the argument as the length.
     obj = array->Initialize(0);
     if (obj->IsFailure()) return obj;
-    if (__argc__ == 2) return array->SetElementsLength(BUILTIN_ARG(1));
+    if (args.length() == 2) return array->SetElementsLength(args[1]);
   }
 
   // Optimize the case where there are no parameters passed.
-  if (__argc__ == 1) return array->Initialize(4);
+  if (args.length() == 1) return array->Initialize(4);
 
   // Take the arguments as elements.
-  int number_of_elements = __argc__ - 1;
+  int number_of_elements = args.length() - 1;
   Smi* len = Smi::FromInt(number_of_elements);
   Object* obj = Heap::AllocateFixedArrayWithHoles(len->value());
   if (obj->IsFailure()) return obj;
@@ -197,7 +181,7 @@ BUILTIN(ArrayCode) {
   WriteBarrierMode mode = elms->GetWriteBarrierMode();
   // Fill in the content
   for (int index = 0; index < number_of_elements; index++) {
-    elms->set(index, BUILTIN_ARG(index+1), mode);
+    elms->set(index, args[index+1], mode);
   }
 
   // Set length and elements on the array.
@@ -217,13 +201,13 @@ BUILTIN(ArrayPush) {
   int len = Smi::cast(array->length())->value();
 
   // Set new length.
-  int new_length = len + __argc__ - 1;
+  int new_length = len + args.length() - 1;
   FixedArray* elms = FixedArray::cast(array->elements());
 
   if (new_length <= elms->length()) {
     // Backing storage has extra space for the provided values.
-    for (int index = 0; index < __argc__ - 1; index++) {
-      elms->set(index + len, BUILTIN_ARG(index+1));
+    for (int index = 0; index < args.length() - 1; index++) {
+      elms->set(index + len, args[index+1]);
     }
   } else {
     // New backing storage is needed.
@@ -235,8 +219,8 @@ BUILTIN(ArrayPush) {
     // Fill out the new array with old elements.
     for (int i = 0; i < len; i++) new_elms->set(i, elms->get(i), mode);
     // Add the provided values.
-    for (int index = 0; index < __argc__ - 1; index++) {
-      new_elms->set(index + len, BUILTIN_ARG(index+1), mode);
+    for (int index = 0; index < args.length() - 1; index++) {
+      new_elms->set(index + len, args[index+1], mode);
     }
     // Set the new backing storage.
     array->set_elements(new_elms);
@@ -353,7 +337,7 @@ BUILTIN(HandleApiCall) {
 
   FunctionTemplateInfo* fun_data =
       FunctionTemplateInfo::cast(function->shared()->function_data());
-  Object* raw_holder = TypeCheck(__argc__, __argv__, fun_data);
+  Object* raw_holder = TypeCheck(args.length(), &args[0], fun_data);
 
   if (raw_holder->IsNull()) {
     // This function cannot be called with the given receiver.  Abort!
@@ -380,19 +364,19 @@ BUILTIN(HandleApiCall) {
     Handle<JSObject> holder_handle(JSObject::cast(raw_holder));
     v8::Local<v8::Object> holder = v8::Utils::ToLocal(holder_handle);
     LOG(ApiObjectAccess("call", JSObject::cast(*receiver)));
-    v8::Arguments args = v8::ImplementationUtilities::NewArguments(
+    v8::Arguments new_args = v8::ImplementationUtilities::NewArguments(
         data,
         holder,
         callee,
         is_construct,
-        reinterpret_cast<void**>(__argv__ - 1),
-        __argc__ - 1);
+        reinterpret_cast<void**>(&args[0] - 1),
+        args.length() - 1);
 
     v8::Handle<v8::Value> value;
     {
       // Leaving JavaScript.
       VMState state(EXTERNAL);
-      value = callback(args);
+      value = callback(new_args);
     }
     if (value.IsEmpty()) {
       result = Heap::undefined_value();
@@ -413,13 +397,12 @@ BUILTIN_END
 // API. The object can be called as either a constructor (using new) or just as
 // a function (without new).
 static Object* HandleApiCallAsFunctionOrConstructor(bool is_construct_call,
-                                                    int __argc__,
-                                                    Object** __argv__) {
+                                                    Arguments args) {
   // Non-functions are never called as constructors. Even if this is an object
   // called as a constructor the delegate call is not a construct call.
   ASSERT(!CalledAsConstructor());
 
-  Handle<Object> receiver(&__argv__[0]);
+  Handle<Object> receiver = args.at<Object>(0);
 
   // Get the object called.
   JSObject* obj = JSObject::cast(*receiver);
@@ -448,18 +431,18 @@ static Object* HandleApiCallAsFunctionOrConstructor(bool is_construct_call,
     Handle<JSFunction> callee_handle(constructor);
     v8::Local<v8::Function> callee = v8::Utils::ToLocal(callee_handle);
     LOG(ApiObjectAccess("call non-function", JSObject::cast(*receiver)));
-    v8::Arguments args = v8::ImplementationUtilities::NewArguments(
+    v8::Arguments new_args = v8::ImplementationUtilities::NewArguments(
         data,
         self,
         callee,
         is_construct_call,
-        reinterpret_cast<void**>(__argv__ - 1),
-        __argc__ - 1);
+        reinterpret_cast<void**>(&args[0] - 1),
+        args.length() - 1);
     v8::Handle<v8::Value> value;
     {
       // Leaving JavaScript.
       VMState state(EXTERNAL);
-      value = callback(args);
+      value = callback(new_args);
     }
     if (value.IsEmpty()) {
       result = Heap::undefined_value();
@@ -476,7 +459,7 @@ static Object* HandleApiCallAsFunctionOrConstructor(bool is_construct_call,
 // Handle calls to non-function objects created through the API. This delegate
 // function is used when the call is a normal function call.
 BUILTIN(HandleApiCallAsFunction) {
-  return HandleApiCallAsFunctionOrConstructor(false, __argc__, __argv__);
+  return HandleApiCallAsFunctionOrConstructor(false, args);
 }
 BUILTIN_END
 
@@ -484,7 +467,7 @@ BUILTIN_END
 // Handle calls to non-function objects created through the API. This delegate
 // function is used when the call is a construct call.
 BUILTIN(HandleApiCallAsConstructor) {
-  return HandleApiCallAsFunctionOrConstructor(true, __argc__, __argv__);
+  return HandleApiCallAsFunctionOrConstructor(true, args);
 }
 BUILTIN_END
 
diff --git a/deps/v8/src/checks.h b/deps/v8/src/checks.h
index b302e5bee..4ecbaf4cf 100644
--- a/deps/v8/src/checks.h
+++ b/deps/v8/src/checks.h
@@ -95,6 +95,38 @@ static inline void CheckNonEqualsHelper(const char* file,
   }
 }
 
+#ifdef V8_TARGET_ARCH_X64
+// Helper function used by the CHECK_EQ function when given intptr_t
+// arguments.  Should not be called directly.
+static inline void CheckEqualsHelper(const char* file,
+                                     int line,
+                                     const char* expected_source,
+                                     intptr_t expected,
+                                     const char* value_source,
+                                     intptr_t value) {
+  if (expected != value) {
+    V8_Fatal(file, line,
+             "CHECK_EQ(%s, %s) failed\n#   Expected: %i\n#   Found: %i",
+             expected_source, value_source, expected, value);
+  }
+}
+
+
+// Helper function used by the CHECK_NE function when given intptr_t
+// arguments.  Should not be called directly.
+static inline void CheckNonEqualsHelper(const char* file,
+                                        int line,
+                                        const char* unexpected_source,
+                                        intptr_t unexpected,
+                                        const char* value_source,
+                                        intptr_t value) {
+  if (unexpected == value) {
+    V8_Fatal(file, line, "CHECK_NE(%s, %s) failed\n#   Value: %i",
+             unexpected_source, value_source, value);
+  }
+}
+#endif  // V8_TARGET_ARCH_X64
+
 
 // Helper function used by the CHECK function when given string
 // arguments.  Should not be called directly.
diff --git a/deps/v8/src/code-stubs.h b/deps/v8/src/code-stubs.h
index 76ec7870f..ae86c20ef 100644
--- a/deps/v8/src/code-stubs.h
+++ b/deps/v8/src/code-stubs.h
@@ -57,6 +57,7 @@ class CodeStub BASE_EMBEDDED {
     SetProperty,   // ARM only
     InvokeBuiltin,  // ARM only
     JSExit,        // ARM only
+    RegExpCEntry,  // ARM only
     NUMBER_OF_IDS
   };
 
diff --git a/deps/v8/src/compiler.cc b/deps/v8/src/compiler.cc
index feff49240..15f64794d 100644
--- a/deps/v8/src/compiler.cc
+++ b/deps/v8/src/compiler.cc
@@ -425,6 +425,13 @@ bool Compiler::CompileLazy(Handle<SharedFunctionInfo> shared,
   // Set the expected number of properties for instances.
   SetExpectedNofPropertiesFromEstimate(shared, lit->expected_property_count());
 
+  // Set the optimication hints after performing lazy compilation, as these are
+  // not set when the function is set up as a lazily compiled function.
+  shared->SetThisPropertyAssignmentsInfo(
+      lit->has_only_this_property_assignments(),
+      lit->has_only_simple_this_property_assignments(),
+      *lit->this_property_assignments());
+
   // Check the function has compiled code.
   ASSERT(shared->is_compiled());
   return true;
diff --git a/deps/v8/src/d8.js b/deps/v8/src/d8.js
index 3a0eedbf1..da5be1f3d 100644
--- a/deps/v8/src/d8.js
+++ b/deps/v8/src/d8.js
@@ -1143,7 +1143,7 @@ function DebugResponseDetails(response) {
  * @constructor
  */
 function ProtocolPackage(json) {
-  this.packet_ = eval('(' + json + ')');
+  this.packet_ = JSON.parse(json);
   this.refs_ = [];
   if (this.packet_.refs) {
     for (var i = 0; i < this.packet_.refs.length; i++) {
diff --git a/deps/v8/src/debug-delay.js b/deps/v8/src/debug-delay.js
index 4f6085128..ce70c75b4 100644
--- a/deps/v8/src/debug-delay.js
+++ b/deps/v8/src/debug-delay.js
@@ -466,9 +466,14 @@ Debug.source = function(f) {
   return %FunctionGetSourceCode(f);
 };
 
-Debug.assembler = function(f) {
+Debug.disassemble = function(f) {
   if (!IS_FUNCTION(f)) throw new Error('Parameters have wrong types.');
-  return %FunctionGetAssemblerCode(f);
+  return %DebugDisassembleFunction(f);
+};
+
+Debug.disassembleConstructor = function(f) {
+  if (!IS_FUNCTION(f)) throw new Error('Parameters have wrong types.');
+  return %DebugDisassembleConstructor(f);
 };
 
 Debug.sourcePosition = function(f) {
diff --git a/deps/v8/src/debug.cc b/deps/v8/src/debug.cc
index faeb29ba4..e341022aa 100644
--- a/deps/v8/src/debug.cc
+++ b/deps/v8/src/debug.cc
@@ -661,7 +661,7 @@ bool Debug::CompileDebuggerScript(int index) {
   // Check for caught exceptions.
   if (caught_exception) {
     Handle<Object> message = MessageHandler::MakeMessageObject(
-        "error_loading_debugger", NULL, HandleVector<Object>(&result, 1),
+        "error_loading_debugger", NULL, Vector<Handle<Object> >::empty(),
         Handle<String>());
     MessageHandler::ReportMessage(NULL, message);
     return false;
@@ -2001,9 +2001,7 @@ void Debugger::ProcessDebugEvent(v8::DebugEvent event,
                               event_listener_data_.location() };
       Handle<Object> result = Execution::TryCall(fun, Top::global(),
                                                  argc, argv, &caught_exception);
-      if (caught_exception) {
-        // Silently ignore exceptions from debug event listeners.
-      }
+      // Silently ignore exceptions from debug event listeners.
     }
   }
 }
diff --git a/deps/v8/src/execution.cc b/deps/v8/src/execution.cc
index 7c42e5e74..04ec9059f 100644
--- a/deps/v8/src/execution.cc
+++ b/deps/v8/src/execution.cc
@@ -156,9 +156,12 @@ Handle<Object> Execution::TryCall(Handle<JSFunction> func,
     ASSERT(catcher.HasCaught());
     ASSERT(Top::has_pending_exception());
     ASSERT(Top::external_caught_exception());
-    bool is_bottom_call = HandleScopeImplementer::instance()->CallDepthIsZero();
-    Top::OptionalRescheduleException(is_bottom_call, true);
-    result = v8::Utils::OpenHandle(*catcher.Exception());
+    if (Top::pending_exception() == Heap::termination_exception()) {
+      result = Factory::termination_exception();
+    } else {
+      result = v8::Utils::OpenHandle(*catcher.Exception());
+    }
+    Top::OptionalRescheduleException(true);
   }
 
   ASSERT(!Top::has_pending_exception());
@@ -234,8 +237,9 @@ StackGuard::StackGuard() {
            (thread_local_.climit_ == kInterruptLimit &&
             thread_local_.interrupt_flags_ != 0));
 
-    thread_local_.initial_jslimit_ = thread_local_.jslimit_ =
-        GENERATED_CODE_STACK_LIMIT(kLimitSize);
+    uintptr_t limit = GENERATED_CODE_STACK_LIMIT(kLimitSize);
+    thread_local_.initial_jslimit_ = thread_local_.jslimit_ = limit;
+    Heap::SetStackLimit(limit);
     // NOTE: The check for overflow is not safe as there is no guarantee that
     // the running thread has its stack in all memory up to address 0x00000000.
     thread_local_.initial_climit_ = thread_local_.climit_ =
@@ -283,6 +287,7 @@ void StackGuard::SetStackLimit(uintptr_t limit) {
   // leave them alone.
   if (thread_local_.jslimit_ == thread_local_.initial_jslimit_) {
     thread_local_.jslimit_ = limit;
+    Heap::SetStackLimit(limit);
   }
   if (thread_local_.climit_ == thread_local_.initial_climit_) {
     thread_local_.climit_ = limit;
@@ -397,6 +402,7 @@ char* StackGuard::ArchiveStackGuard(char* to) {
 char* StackGuard::RestoreStackGuard(char* from) {
   ExecutionAccess access;
   memcpy(reinterpret_cast<char*>(&thread_local_), from, sizeof(ThreadLocal));
+  Heap::SetStackLimit(thread_local_.jslimit_);
   return from + sizeof(ThreadLocal);
 }
 
diff --git a/deps/v8/src/execution.h b/deps/v8/src/execution.h
index 456cbe74d..4cdfd2be6 100644
--- a/deps/v8/src/execution.h
+++ b/deps/v8/src/execution.h
@@ -175,6 +175,10 @@ class StackGuard BASE_EMBEDDED {
 #endif
   static void Continue(InterruptFlag after_what);
 
+  static uintptr_t jslimit() {
+    return thread_local_.jslimit_;
+  }
+
  private:
   // You should hold the ExecutionAccess lock when calling this method.
   static bool IsSet(const ExecutionAccess& lock);
@@ -188,6 +192,7 @@ class StackGuard BASE_EMBEDDED {
 
   // You should hold the ExecutionAccess lock when calling this method.
   static void set_limits(uintptr_t value, const ExecutionAccess& lock) {
+    Heap::SetStackLimit(value);
     thread_local_.jslimit_ = value;
     thread_local_.climit_ = value;
   }
@@ -200,6 +205,7 @@ class StackGuard BASE_EMBEDDED {
       set_limits(kIllegalLimit, lock);
     } else {
       thread_local_.jslimit_ = thread_local_.initial_jslimit_;
+      Heap::SetStackLimit(thread_local_.jslimit_);
       thread_local_.climit_ = thread_local_.initial_climit_;
     }
   }
@@ -220,13 +226,15 @@ class StackGuard BASE_EMBEDDED {
   class ThreadLocal {
    public:
     ThreadLocal()
-     : initial_jslimit_(kIllegalLimit),
-       jslimit_(kIllegalLimit),
-       initial_climit_(kIllegalLimit),
-       climit_(kIllegalLimit),
-       nesting_(0),
-       postpone_interrupts_nesting_(0),
-       interrupt_flags_(0) {}
+      : initial_jslimit_(kIllegalLimit),
+        jslimit_(kIllegalLimit),
+        initial_climit_(kIllegalLimit),
+        climit_(kIllegalLimit),
+        nesting_(0),
+        postpone_interrupts_nesting_(0),
+        interrupt_flags_(0) {
+      Heap::SetStackLimit(kIllegalLimit);
+    }
     uintptr_t initial_jslimit_;
     uintptr_t jslimit_;
     uintptr_t initial_climit_;
diff --git a/deps/v8/src/frames-inl.h b/deps/v8/src/frames-inl.h
index b04cf506d..c5f2f1a33 100644
--- a/deps/v8/src/frames-inl.h
+++ b/deps/v8/src/frames-inl.h
@@ -128,8 +128,9 @@ inline Address StandardFrame::ComputePCAddress(Address fp) {
 
 
 inline bool StandardFrame::IsArgumentsAdaptorFrame(Address fp) {
-  int context = Memory::int_at(fp + StandardFrameConstants::kContextOffset);
-  return context == ArgumentsAdaptorFrame::SENTINEL;
+  Object* marker =
+      Memory::Object_at(fp + StandardFrameConstants::kContextOffset);
+  return marker == Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR);
 }
 
 
diff --git a/deps/v8/src/frames.h b/deps/v8/src/frames.h
index f002e1216..768196d3c 100644
--- a/deps/v8/src/frames.h
+++ b/deps/v8/src/frames.h
@@ -434,15 +434,6 @@ class JavaScriptFrame: public StandardFrame {
 // match the formal number of parameters.
 class ArgumentsAdaptorFrame: public JavaScriptFrame {
  public:
-  // This sentinel value is temporarily used to distinguish arguments
-  // adaptor frames from ordinary JavaScript frames. If a frame has
-  // the sentinel as its context, it is an arguments adaptor frame. It
-  // must be tagged as a small integer to avoid GC issues. Crud.
-  enum {
-    SENTINEL = (1 << kSmiTagSize) | kSmiTag,
-    NON_SENTINEL = ~SENTINEL
-  };
-
   virtual Type type() const { return ARGUMENTS_ADAPTOR; }
 
   // Determine the code for the frame.
diff --git a/deps/v8/src/globals.h b/deps/v8/src/globals.h
index 195a2e2fc..efe0127e0 100644
--- a/deps/v8/src/globals.h
+++ b/deps/v8/src/globals.h
@@ -47,7 +47,14 @@ namespace internal {
 #define V8_HOST_ARCH_ARM 1
 #define V8_HOST_ARCH_32_BIT 1
 #else
-#error Your architecture was not detected as supported by v8
+#error Your host architecture was not detected as supported by v8
+#endif
+
+#if defined(V8_TARGET_ARCH_X64) || defined(V8_TARGET_ARCH_IA32)
+#define V8_TARGET_CAN_READ_UNALIGNED 1
+#elif V8_TARGET_ARCH_ARM
+#else
+#error Your target architecture is not supported by v8
 #endif
 
 // Support for alternative bool type. This is only enabled if the code is
@@ -134,17 +141,6 @@ const intptr_t kObjectAlignmentMask = kObjectAlignment - 1;
 const intptr_t kPointerAlignment = (1 << kPointerSizeLog2);
 const intptr_t kPointerAlignmentMask = kPointerAlignment - 1;
 
-// Tag information for HeapObject.
-const int kHeapObjectTag = 1;
-const int kHeapObjectTagSize = 2;
-const intptr_t kHeapObjectTagMask = (1 << kHeapObjectTagSize) - 1;
-
-
-// Tag information for Smi.
-const int kSmiTag = 0;
-const int kSmiTagSize = 1;
-const intptr_t kSmiTagMask = (1 << kSmiTagSize) - 1;
-
 
 // Tag information for Failure.
 const int kFailureTag = 3;
@@ -429,9 +425,6 @@ enum StateTag {
 #define HAS_FAILURE_TAG(value) \
   ((reinterpret_cast<intptr_t>(value) & kFailureTagMask) == kFailureTag)
 
-#define HAS_HEAP_OBJECT_TAG(value) \
-  ((reinterpret_cast<intptr_t>(value) & kHeapObjectTagMask) == kHeapObjectTag)
-
 // OBJECT_SIZE_ALIGN returns the value aligned HeapObject size
 #define OBJECT_SIZE_ALIGN(value)                                \
   (((value) + kObjectAlignmentMask) & ~kObjectAlignmentMask)
diff --git a/deps/v8/src/handles.cc b/deps/v8/src/handles.cc
index 6345d4181..fae006a4d 100644
--- a/deps/v8/src/handles.cc
+++ b/deps/v8/src/handles.cc
@@ -53,8 +53,8 @@ int HandleScope::NumberOfHandles() {
 }
 
 
-void** HandleScope::Extend() {
-  void** result = current_.next;
+Object** HandleScope::Extend() {
+  Object** result = current_.next;
 
   ASSERT(result == current_.limit);
   // Make sure there's at least one scope on the stack and that the
@@ -68,7 +68,7 @@ void** HandleScope::Extend() {
   // If there's more room in the last block, we use that. This is used
   // for fast creation of scopes after scope barriers.
   if (!impl->Blocks()->is_empty()) {
-    void** limit = &impl->Blocks()->last()[kHandleBlockSize];
+    Object** limit = &impl->Blocks()->last()[kHandleBlockSize];
     if (current_.limit != limit) {
       current_.limit = limit;
     }
@@ -96,10 +96,10 @@ void HandleScope::DeleteExtensions() {
 }
 
 
-void HandleScope::ZapRange(void** start, void** end) {
+void HandleScope::ZapRange(Object** start, Object** end) {
   if (start == NULL) return;
-  for (void** p = start; p < end; p++) {
-    *p = reinterpret_cast<void*>(v8::internal::kHandleZapValue);
+  for (Object** p = start; p < end; p++) {
+    *reinterpret_cast<Address*>(p) = v8::internal::kHandleZapValue;
   }
 }
 
diff --git a/deps/v8/src/handles.h b/deps/v8/src/handles.h
index 8c9cbebfd..847aebb3b 100644
--- a/deps/v8/src/handles.h
+++ b/deps/v8/src/handles.h
@@ -121,7 +121,7 @@ class HandleScope {
   // Creates a new handle with the given value.
   template <typename T>
   static inline T** CreateHandle(T* value) {
-    void** cur = current_.next;
+    internal::Object** cur = current_.next;
     if (cur == current_.limit) cur = Extend();
     // Update the current next field, set the value in the created
     // handle, and return the result.
@@ -164,13 +164,13 @@ class HandleScope {
   }
 
   // Extend the handle scope making room for more handles.
-  static void** Extend();
+  static internal::Object** Extend();
 
   // Deallocates any extensions used by the current scope.
   static void DeleteExtensions();
 
   // Zaps the handles in the half-open interval [start, end).
-  static void ZapRange(void** start, void** end);
+  static void ZapRange(internal::Object** start, internal::Object** end);
 
   friend class v8::HandleScope;
   friend class v8::ImplementationUtilities;
diff --git a/deps/v8/src/heap.cc b/deps/v8/src/heap.cc
index ef4c2d4b0..c29815e55 100644
--- a/deps/v8/src/heap.cc
+++ b/deps/v8/src/heap.cc
@@ -39,6 +39,9 @@
 #include "scanner.h"
 #include "scopeinfo.h"
 #include "v8threads.h"
+#if V8_TARGET_ARCH_ARM && V8_NATIVE_REGEXP
+#include "regexp-macro-assembler.h"
+#endif
 
 namespace v8 {
 namespace internal {
@@ -254,6 +257,7 @@ void Heap::ReportStatisticsAfterGC() {
 
 
 void Heap::GarbageCollectionPrologue() {
+  TranscendentalCache::Clear();
   gc_count_++;
 #ifdef DEBUG
   ASSERT(allocation_allowed_ && gc_state_ == NOT_IN_GC);
@@ -465,9 +469,9 @@ void Heap::PerformGarbageCollection(AllocationSpace space,
     old_gen_allocation_limit_ =
         old_gen_size + Max(kMinimumAllocationLimit, old_gen_size / 2);
     old_gen_exhausted_ = false;
-  } else {
-    Scavenge();
   }
+  Scavenge();
+
   Counters::objs_since_last_young.Set(0);
 
   PostGarbageCollectionProcessing();
@@ -521,12 +525,6 @@ void Heap::MarkCompact(GCTracer* tracer) {
 
   Counters::objs_since_last_full.Set(0);
   context_disposed_pending_ = false;
-
-  Scavenge();
-
-  // Shrink new space as much as possible after compacting full
-  // garbage collections.
-  if (is_compacting) new_space_.Shrink();
 }
 
 
@@ -1326,6 +1324,14 @@ void Heap::CreateCEntryStub() {
 }
 
 
+#if V8_TARGET_ARCH_ARM && V8_NATIVE_REGEXP
+void Heap::CreateRegExpCEntryStub() {
+  RegExpCEntryStub stub;
+  set_re_c_entry_code(*stub.GetCode());
+}
+#endif
+
+
 void Heap::CreateCEntryDebugBreakStub() {
   CEntryDebugBreakStub stub;
   set_c_entry_debug_break_code(*stub.GetCode());
@@ -1362,6 +1368,9 @@ void Heap::CreateFixedStubs() {
   Heap::CreateCEntryDebugBreakStub();
   Heap::CreateJSEntryStub();
   Heap::CreateJSConstructEntryStub();
+#if V8_TARGET_ARCH_ARM && V8_NATIVE_REGEXP
+  Heap::CreateRegExpCEntryStub();
+#endif
 }
 
 
@@ -2785,6 +2794,41 @@ STRUCT_LIST(MAKE_CASE)
 }
 
 
+bool Heap::IdleNotification() {
+  static const int kIdlesBeforeCollection = 7;
+  static int number_idle_notifications = 0;
+  static int last_gc_count = gc_count_;
+
+  bool finished = false;
+
+  if (last_gc_count == gc_count_) {
+    number_idle_notifications++;
+  } else {
+    number_idle_notifications = 0;
+    last_gc_count = gc_count_;
+  }
+
+  if (number_idle_notifications >= kIdlesBeforeCollection) {
+    // The first time through we collect without forcing compaction.
+    // The second time through we force compaction and quit.
+    bool force_compaction =
+        number_idle_notifications > kIdlesBeforeCollection;
+    CollectAllGarbage(force_compaction);
+    last_gc_count = gc_count_;
+    if (force_compaction) {
+      // Shrink new space.
+      new_space_.Shrink();
+      number_idle_notifications = 0;
+      finished = true;
+    }
+  }
+
+  // Uncommit unused memory in new space.
+  Heap::UncommitFromSpace();
+  return finished;
+}
+
+
 #ifdef DEBUG
 
 void Heap::Print() {
@@ -2950,7 +2994,7 @@ bool Heap::LookupSymbolIfExists(String* string, String** symbol) {
 
 #ifdef DEBUG
 void Heap::ZapFromSpace() {
-  ASSERT(HAS_HEAP_OBJECT_TAG(kFromSpaceZapValue));
+  ASSERT(reinterpret_cast<Object*>(kFromSpaceZapValue)->IsHeapObject());
   for (Address a = new_space_.FromSpaceLow();
        a < new_space_.FromSpaceHigh();
        a += kPointerSize) {
@@ -3223,6 +3267,17 @@ bool Heap::Setup(bool create_heap_objects) {
 }
 
 
+void Heap::SetStackLimit(intptr_t limit) {
+  // On 64 bit machines, pointers are generally out of range of Smis.  We write
+  // something that looks like an out of range Smi to the GC.
+
+  // Set up the special root array entry containing the stack guard.
+  // This is actually an address, but the tag makes the GC ignore it.
+  roots_[kStackLimitRootIndex] =
+    reinterpret_cast<Object*>((limit & ~kSmiTagMask) | kSmiTag);
+}
+
+
 void Heap::TearDown() {
   GlobalHandles::TearDown();
 
@@ -3932,4 +3987,30 @@ bool Heap::GarbageCollectionGreedyCheck() {
 }
 #endif
 
+
+TranscendentalCache::TranscendentalCache(TranscendentalCache::Type t)
+  : type_(t) {
+  uint32_t in0 = 0xffffffffu;  // Bit-pattern for a NaN that isn't
+  uint32_t in1 = 0xffffffffu;  // generated by the FPU.
+  for (int i = 0; i < kCacheSize; i++) {
+    elements_[i].in[0] = in0;
+    elements_[i].in[1] = in1;
+    elements_[i].output = NULL;
+  }
+}
+
+
+TranscendentalCache* TranscendentalCache::caches_[kNumberOfCaches];
+
+
+void TranscendentalCache::Clear() {
+  for (int i = 0; i < kNumberOfCaches; i++) {
+    if (caches_[i] != NULL) {
+      delete caches_[i];
+      caches_[i] = NULL;
+    }
+  }
+}
+
+
 } }  // namespace v8::internal
diff --git a/deps/v8/src/heap.h b/deps/v8/src/heap.h
index 9fd3fecb7..028dd1118 100644
--- a/deps/v8/src/heap.h
+++ b/deps/v8/src/heap.h
@@ -28,15 +28,31 @@
 #ifndef V8_HEAP_H_
 #define V8_HEAP_H_
 
+#include <math.h>
+
 #include "zone-inl.h"
 
+
 namespace v8 {
 namespace internal {
 
 // Defines all the roots in Heap.
-#define STRONG_ROOT_LIST(V)                                                    \
-  V(Map, meta_map, MetaMap)                                                    \
+#define UNCONDITIONAL_STRONG_ROOT_LIST(V)                                      \
+  /* Cluster the most popular ones in a few cache lines here at the top. */    \
+  V(Smi, stack_limit, StackLimit)                                              \
+  V(Object, undefined_value, UndefinedValue)                                   \
+  V(Object, the_hole_value, TheHoleValue)                                      \
+  V(Object, null_value, NullValue)                                             \
+  V(Object, true_value, TrueValue)                                             \
+  V(Object, false_value, FalseValue)                                           \
   V(Map, heap_number_map, HeapNumberMap)                                       \
+  V(Map, global_context_map, GlobalContextMap)                                 \
+  V(Map, fixed_array_map, FixedArrayMap)                                       \
+  V(Object, no_interceptor_result_sentinel, NoInterceptorResultSentinel)       \
+  V(Map, meta_map, MetaMap)                                                    \
+  V(Object, termination_exception, TerminationException)                       \
+  V(Map, hash_table_map, HashTableMap)                                         \
+  V(FixedArray, empty_fixed_array, EmptyFixedArray)                            \
   V(Map, short_string_map, ShortStringMap)                                     \
   V(Map, medium_string_map, MediumStringMap)                                   \
   V(Map, long_string_map, LongStringMap)                                       \
@@ -95,11 +111,8 @@ namespace internal {
   V(Map, undetectable_long_ascii_string_map, UndetectableLongAsciiStringMap)   \
   V(Map, byte_array_map, ByteArrayMap)                                         \
   V(Map, pixel_array_map, PixelArrayMap)                                       \
-  V(Map, fixed_array_map, FixedArrayMap)                                       \
-  V(Map, hash_table_map, HashTableMap)                                         \
   V(Map, context_map, ContextMap)                                              \
   V(Map, catch_context_map, CatchContextMap)                                   \
-  V(Map, global_context_map, GlobalContextMap)                                 \
   V(Map, code_map, CodeMap)                                                    \
   V(Map, oddball_map, OddballMap)                                              \
   V(Map, global_property_cell_map, GlobalPropertyCellMap)                      \
@@ -109,17 +122,9 @@ namespace internal {
   V(Map, one_pointer_filler_map, OnePointerFillerMap)                          \
   V(Map, two_pointer_filler_map, TwoPointerFillerMap)                          \
   V(Object, nan_value, NanValue)                                               \
-  V(Object, undefined_value, UndefinedValue)                                   \
-  V(Object, no_interceptor_result_sentinel, NoInterceptorResultSentinel)       \
-  V(Object, termination_exception, TerminationException)                       \
   V(Object, minus_zero_value, MinusZeroValue)                                  \
-  V(Object, null_value, NullValue)                                             \
-  V(Object, true_value, TrueValue)                                             \
-  V(Object, false_value, FalseValue)                                           \
   V(String, empty_string, EmptyString)                                         \
-  V(FixedArray, empty_fixed_array, EmptyFixedArray)                            \
   V(DescriptorArray, empty_descriptor_array, EmptyDescriptorArray)             \
-  V(Object, the_hole_value, TheHoleValue)                                      \
   V(Map, neander_map, NeanderMap)                                              \
   V(JSObject, message_listeners, MessageListeners)                             \
   V(Proxy, prototype_accessors, PrototypeAccessors)                            \
@@ -132,8 +137,15 @@ namespace internal {
   V(FixedArray, number_string_cache, NumberStringCache)                        \
   V(FixedArray, single_character_string_cache, SingleCharacterStringCache)     \
   V(FixedArray, natives_source_cache, NativesSourceCache)                      \
-  V(Object, last_script_id, LastScriptId)
+  V(Object, last_script_id, LastScriptId)                                      \
 
+#if V8_TARGET_ARCH_ARM && V8_NATIVE_REGEXP
+#define STRONG_ROOT_LIST(V)                                                    \
+  UNCONDITIONAL_STRONG_ROOT_LIST(V)                                            \
+  V(Code, re_c_entry_code, RegExpCEntryCode)
+#else
+#define STRONG_ROOT_LIST(V) UNCONDITIONAL_STRONG_ROOT_LIST(V)
+#endif
 
 #define ROOT_LIST(V)                                  \
   STRONG_ROOT_LIST(V)                                 \
@@ -227,6 +239,11 @@ class Heap : public AllStatic {
   // Destroys all memory allocated by the heap.
   static void TearDown();
 
+  // Sets the stack limit in the roots_ array.  Some architectures generate code
+  // that looks here, because it is faster than loading from the static jslimit_
+  // variable.
+  static void SetStackLimit(intptr_t limit);
+
   // Returns whether Setup has been called.
   static bool HasBeenSetup();
 
@@ -843,37 +860,7 @@ class Heap : public AllStatic {
   }
 
   // Can be called when the embedding application is idle.
-  static bool IdleNotification() {
-    static const int kIdlesBeforeCollection = 7;
-    static int number_idle_notifications = 0;
-    static int last_gc_count = gc_count_;
-
-    bool finished = false;
-
-    if (last_gc_count == gc_count_) {
-      number_idle_notifications++;
-    } else {
-      number_idle_notifications = 0;
-      last_gc_count = gc_count_;
-    }
-
-    if (number_idle_notifications >= kIdlesBeforeCollection) {
-      // The first time through we collect without forcing compaction.
-      // The second time through we force compaction and quit.
-      bool force_compaction =
-          number_idle_notifications > kIdlesBeforeCollection;
-      CollectAllGarbage(force_compaction);
-      last_gc_count = gc_count_;
-      if (force_compaction) {
-        number_idle_notifications = 0;
-        finished = true;
-      }
-    }
-
-    // Uncommit unused memory in new space.
-    Heap::UncommitFromSpace();
-    return finished;
-  }
+  static bool IdleNotification();
 
   // Declare all the root indices.
   enum RootListIndex {
@@ -1048,6 +1035,8 @@ class Heap : public AllStatic {
   static void CreateCEntryDebugBreakStub();
   static void CreateJSEntryStub();
   static void CreateJSConstructEntryStub();
+  static void CreateRegExpCEntryStub();
+
   static void CreateFixedStubs();
 
   static Object* CreateOddball(Map* map,
@@ -1533,6 +1522,91 @@ class GCTracer BASE_EMBEDDED {
   int previous_marked_count_;
 };
 
+
+class TranscendentalCache {
+ public:
+  enum Type {ACOS, ASIN, ATAN, COS, EXP, LOG, SIN, TAN, kNumberOfCaches};
+
+  explicit TranscendentalCache(Type t);
+
+  // Returns a heap number with f(input), where f is a math function specified
+  // by the 'type' argument.
+  static inline Object* Get(Type type, double input) {
+    TranscendentalCache* cache = caches_[type];
+    if (cache == NULL) {
+      caches_[type] = cache = new TranscendentalCache(type);
+    }
+    return cache->Get(input);
+  }
+
+  // The cache contains raw Object pointers.  This method disposes of
+  // them before a garbage collection.
+  static void Clear();
+
+ private:
+  inline Object* Get(double input) {
+    Converter c;
+    c.dbl = input;
+    int hash = Hash(c);
+    Element e = elements_[hash];
+    if (e.in[0] == c.integers[0] &&
+        e.in[1] == c.integers[1]) {
+      ASSERT(e.output != NULL);
+      return e.output;
+    }
+    double answer = Calculate(input);
+    Object* heap_number = Heap::AllocateHeapNumber(answer);
+    if (!heap_number->IsFailure()) {
+      elements_[hash].in[0] = c.integers[0];
+      elements_[hash].in[1] = c.integers[1];
+      elements_[hash].output = heap_number;
+    }
+    return heap_number;
+  }
+
+  inline double Calculate(double input) {
+    switch (type_) {
+      case ACOS:
+        return acos(input);
+      case ASIN:
+        return asin(input);
+      case ATAN:
+        return atan(input);
+      case COS:
+        return cos(input);
+      case EXP:
+        return exp(input);
+      case LOG:
+        return log(input);
+      case SIN:
+        return sin(input);
+      case TAN:
+        return tan(input);
+      default:
+        return 0.0;  // Never happens.
+    }
+  }
+  static const int kCacheSize = 512;
+  struct Element {
+    uint32_t in[2];
+    Object* output;
+  };
+  union Converter {
+    double dbl;
+    uint32_t integers[2];
+  };
+  inline static int Hash(const Converter& c) {
+    uint32_t hash = (c.integers[0] ^ c.integers[1]);
+    hash ^= hash >> 16;
+    hash ^= hash >> 8;
+    return (hash & (kCacheSize - 1));
+  }
+  static TranscendentalCache* caches_[kNumberOfCaches];
+  Element elements_[kCacheSize];
+  Type type_;
+};
+
+
 } }  // namespace v8::internal
 
 #endif  // V8_HEAP_H_
diff --git a/deps/v8/src/ia32/builtins-ia32.cc b/deps/v8/src/ia32/builtins-ia32.cc
index 6de9de6ee..55dc92dd9 100644
--- a/deps/v8/src/ia32/builtins-ia32.cc
+++ b/deps/v8/src/ia32/builtins-ia32.cc
@@ -132,15 +132,8 @@ void Builtins::Generate_JSConstructStubGeneric(MacroAssembler* masm) {
     // Make sure that the maximum heap object size will never cause us
     // problem here, because it is always greater than the maximum
     // instance size that can be represented in a byte.
-    ASSERT(Heap::MaxObjectSizeInPagedSpace() >= (1 << kBitsPerByte));
-    ExternalReference new_space_allocation_top =
-        ExternalReference::new_space_allocation_top_address();
-    __ mov(ebx, Operand::StaticVariable(new_space_allocation_top));
-    __ add(edi, Operand(ebx));  // Calculate new top
-    ExternalReference new_space_allocation_limit =
-        ExternalReference::new_space_allocation_limit_address();
-    __ cmp(edi, Operand::StaticVariable(new_space_allocation_limit));
-    __ j(above_equal, &rt_call);
+    ASSERT(Heap::MaxObjectSizeInPagedSpace() >= JSObject::kMaxInstanceSize);
+    __ AllocateObjectInNewSpace(edi, ebx, edi, no_reg, &rt_call, false);
     // Allocated the JSObject, now initialize the fields.
     // eax: initial map
     // ebx: JSObject
@@ -165,15 +158,14 @@ void Builtins::Generate_JSConstructStubGeneric(MacroAssembler* masm) {
       __ j(less, &loop);
     }
 
-    // Mostly done with the JSObject. Add the heap tag and store the new top, so
-    // that we can continue and jump into the continuation code at any time from
-    // now on. Any failures need to undo the setting of the new top, so that the
-    // heap is in a consistent state and verifiable.
+    // Add the object tag to make the JSObject real, so that we can continue and
+    // jump into the continuation code at any time from now on. Any failures
+    // need to undo the allocation, so that the heap is in a consistent state
+    // and verifiable.
     // eax: initial map
     // ebx: JSObject
     // edi: start of next object
     __ or_(Operand(ebx), Immediate(kHeapObjectTag));
-    __ mov(Operand::StaticVariable(new_space_allocation_top), edi);
 
     // Check if a non-empty properties array is needed.
     // Allocate and initialize a FixedArray if it is.
@@ -198,10 +190,14 @@ void Builtins::Generate_JSConstructStubGeneric(MacroAssembler* masm) {
     // edx: number of elements in properties array
     ASSERT(Heap::MaxObjectSizeInPagedSpace() >
            (FixedArray::kHeaderSize + 255*kPointerSize));
-    __ lea(ecx, Operand(edi, edx, times_pointer_size, FixedArray::kHeaderSize));
-    __ cmp(ecx, Operand::StaticVariable(new_space_allocation_limit));
-    __ j(above_equal, &undo_allocation);
-    __ mov(Operand::StaticVariable(new_space_allocation_top), ecx);
+    __ AllocateObjectInNewSpace(FixedArray::kHeaderSize,
+                                times_pointer_size,
+                                edx,
+                                edi,
+                                ecx,
+                                no_reg,
+                                &undo_allocation,
+                                true);
 
     // Initialize the FixedArray.
     // ebx: JSObject
@@ -245,8 +241,7 @@ void Builtins::Generate_JSConstructStubGeneric(MacroAssembler* masm) {
     // allocated objects unused properties.
     // ebx: JSObject (previous new top)
     __ bind(&undo_allocation);
-    __ xor_(Operand(ebx), Immediate(kHeapObjectTag));  // clear the heap tag
-    __ mov(Operand::StaticVariable(new_space_allocation_top), ebx);
+    __ UndoAllocationInNewSpace(ebx);
   }
 
   // Allocate the new receiver object using the runtime call.
@@ -669,7 +664,7 @@ static void EnterArgumentsAdaptorFrame(MacroAssembler* masm) {
   __ mov(ebp, Operand(esp));
 
   // Store the arguments adaptor context sentinel.
-  __ push(Immediate(ArgumentsAdaptorFrame::SENTINEL));
+  __ push(Immediate(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR)));
 
   // Push the function on the stack.
   __ push(edi);
diff --git a/deps/v8/src/ia32/codegen-ia32.cc b/deps/v8/src/ia32/codegen-ia32.cc
index bf1f81b13..a9face1d7 100644
--- a/deps/v8/src/ia32/codegen-ia32.cc
+++ b/deps/v8/src/ia32/codegen-ia32.cc
@@ -2139,7 +2139,8 @@ void CodeGenerator::CallApplyLazy(Property* apply,
     Label invoke, adapted;
     __ mov(edx, Operand(ebp, StandardFrameConstants::kCallerFPOffset));
     __ mov(ecx, Operand(edx, StandardFrameConstants::kContextOffset));
-    __ cmp(ecx, ArgumentsAdaptorFrame::SENTINEL);
+    __ cmp(Operand(ecx),
+           Immediate(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR)));
     __ j(equal, &adapted);
 
     // No arguments adaptor frame. Copy fixed number of arguments.
@@ -4912,7 +4913,7 @@ void CodeGenerator::GenerateIsConstructCall(ZoneList<Expression*>* args) {
   // Skip the arguments adaptor frame if it exists.
   Label check_frame_marker;
   __ cmp(Operand(fp.reg(), StandardFrameConstants::kContextOffset),
-         Immediate(ArgumentsAdaptorFrame::SENTINEL));
+         Immediate(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR)));
   __ j(not_equal, &check_frame_marker);
   __ mov(fp.reg(), Operand(fp.reg(), StandardFrameConstants::kCallerFPOffset));
 
@@ -6947,21 +6948,18 @@ void FloatingPointHelper::AllocateHeapNumber(MacroAssembler* masm,
                                              Register scratch1,
                                              Register scratch2,
                                              Register result) {
-  ExternalReference allocation_top =
-      ExternalReference::new_space_allocation_top_address();
-  ExternalReference allocation_limit =
-      ExternalReference::new_space_allocation_limit_address();
-  __ mov(Operand(scratch1), Immediate(allocation_top));
-  __ mov(result, Operand(scratch1, 0));
-  __ lea(scratch2, Operand(result, HeapNumber::kSize));  // scratch2: new top
-  __ cmp(scratch2, Operand::StaticVariable(allocation_limit));
-  __ j(above, need_gc, not_taken);
-
-  __ mov(Operand(scratch1, 0), scratch2);  // store new top
+  // Allocate heap number in new space.
+  __ AllocateObjectInNewSpace(HeapNumber::kSize,
+                              result,
+                              scratch1,
+                              scratch2,
+                              need_gc,
+                              false);
+
+  // Set the map and tag the result.
   __ mov(Operand(result, HeapObject::kMapOffset),
          Immediate(Factory::heap_number_map()));
-  // Tag old top and use as result.
-  __ add(Operand(result), Immediate(kHeapObjectTag));
+  __ or_(Operand(result), Immediate(kHeapObjectTag));
 }
 
 
@@ -7109,7 +7107,7 @@ void ArgumentsAccessStub::GenerateReadLength(MacroAssembler* masm) {
   Label adaptor;
   __ mov(edx, Operand(ebp, StandardFrameConstants::kCallerFPOffset));
   __ mov(ecx, Operand(edx, StandardFrameConstants::kContextOffset));
-  __ cmp(ecx, ArgumentsAdaptorFrame::SENTINEL);
+  __ cmp(Operand(ecx), Immediate(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR)));
   __ j(equal, &adaptor);
 
   // Nothing to do: The formal number of parameters has already been
@@ -7141,7 +7139,7 @@ void ArgumentsAccessStub::GenerateReadElement(MacroAssembler* masm) {
   Label adaptor;
   __ mov(ebx, Operand(ebp, StandardFrameConstants::kCallerFPOffset));
   __ mov(ecx, Operand(ebx, StandardFrameConstants::kContextOffset));
-  __ cmp(ecx, ArgumentsAdaptorFrame::SENTINEL);
+  __ cmp(Operand(ecx), Immediate(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR)));
   __ j(equal, &adaptor);
 
   // Check index against formal parameters count limit passed in
@@ -7192,7 +7190,7 @@ void ArgumentsAccessStub::GenerateNewObject(MacroAssembler* masm) {
   Label runtime;
   __ mov(edx, Operand(ebp, StandardFrameConstants::kCallerFPOffset));
   __ mov(ecx, Operand(edx, StandardFrameConstants::kContextOffset));
-  __ cmp(ecx, ArgumentsAdaptorFrame::SENTINEL);
+  __ cmp(Operand(ecx), Immediate(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR)));
   __ j(not_equal, &runtime);
 
   // Patch the arguments.length and the parameters pointer.
@@ -7724,11 +7722,11 @@ void JSEntryStub::GenerateBody(MacroAssembler* masm, bool is_construct) {
   __ push(ebp);
   __ mov(ebp, Operand(esp));
 
-  // Save callee-saved registers (C calling conventions).
+  // Push marker in two places.
   int marker = is_construct ? StackFrame::ENTRY_CONSTRUCT : StackFrame::ENTRY;
-  // Push something that is not an arguments adaptor.
-  __ push(Immediate(~ArgumentsAdaptorFrame::SENTINEL));
-  __ push(Immediate(Smi::FromInt(marker)));  // @ function offset
+  __ push(Immediate(Smi::FromInt(marker)));  // context slot
+  __ push(Immediate(Smi::FromInt(marker)));  // function slot
+  // Save callee-saved registers (C calling conventions).
   __ push(edi);
   __ push(esi);
   __ push(ebx);
diff --git a/deps/v8/src/ia32/ic-ia32.cc b/deps/v8/src/ia32/ic-ia32.cc
index fa9b8a20f..e39808b2e 100644
--- a/deps/v8/src/ia32/ic-ia32.cc
+++ b/deps/v8/src/ia32/ic-ia32.cc
@@ -604,7 +604,7 @@ void CallIC::GenerateNormal(MacroAssembler* masm, int argc) {
   __ mov(ebx, FieldOperand(edx, HeapObject::kMapOffset));
   __ movzx_b(eax, FieldOperand(ebx, Map::kInstanceTypeOffset));
   __ cmp(eax, FIRST_JS_OBJECT_TYPE);
-  __ j(less, &miss, not_taken);
+  __ j(below, &miss, not_taken);
 
   // If this assert fails, we have to check upper bound too.
   ASSERT(LAST_TYPE == JS_FUNCTION_TYPE);
diff --git a/deps/v8/src/ia32/macro-assembler-ia32.cc b/deps/v8/src/ia32/macro-assembler-ia32.cc
index e362cd3c5..754b74abe 100644
--- a/deps/v8/src/ia32/macro-assembler-ia32.cc
+++ b/deps/v8/src/ia32/macro-assembler-ia32.cc
@@ -620,6 +620,146 @@ void MacroAssembler::CheckAccessGlobalProxy(Register holder_reg,
 }
 
 
+void MacroAssembler::LoadAllocationTopHelper(
+    Register result,
+    Register result_end,
+    Register scratch,
+    bool result_contains_top_on_entry) {
+  ExternalReference new_space_allocation_top =
+      ExternalReference::new_space_allocation_top_address();
+
+  // Just return if allocation top is already known.
+  if (result_contains_top_on_entry) {
+    // No use of scratch if allocation top is provided.
+    ASSERT(scratch.is(no_reg));
+    return;
+  }
+
+  // Move address of new object to result. Use scratch register if available.
+  if (scratch.is(no_reg)) {
+    mov(result, Operand::StaticVariable(new_space_allocation_top));
+  } else {
+    ASSERT(!scratch.is(result_end));
+    mov(Operand(scratch), Immediate(new_space_allocation_top));
+    mov(result, Operand(scratch, 0));
+  }
+}
+
+
+void MacroAssembler::UpdateAllocationTopHelper(Register result_end,
+                                               Register scratch) {
+  ExternalReference new_space_allocation_top =
+      ExternalReference::new_space_allocation_top_address();
+
+  // Update new top. Use scratch if available.
+  if (scratch.is(no_reg)) {
+    mov(Operand::StaticVariable(new_space_allocation_top), result_end);
+  } else {
+    mov(Operand(scratch, 0), result_end);
+  }
+}
+
+void MacroAssembler::AllocateObjectInNewSpace(
+    int object_size,
+    Register result,
+    Register result_end,
+    Register scratch,
+    Label* gc_required,
+    bool result_contains_top_on_entry) {
+  ASSERT(!result.is(result_end));
+
+  // Load address of new object into result.
+  LoadAllocationTopHelper(result,
+                          result_end,
+                          scratch,
+                          result_contains_top_on_entry);
+
+  // Calculate new top and bail out if new space is exhausted.
+  ExternalReference new_space_allocation_limit =
+      ExternalReference::new_space_allocation_limit_address();
+  lea(result_end, Operand(result, object_size));
+  cmp(result_end, Operand::StaticVariable(new_space_allocation_limit));
+  j(above, gc_required, not_taken);
+
+  // Update allocation top.
+  UpdateAllocationTopHelper(result_end, scratch);
+}
+
+
+void MacroAssembler::AllocateObjectInNewSpace(
+    int header_size,
+    ScaleFactor element_size,
+    Register element_count,
+    Register result,
+    Register result_end,
+    Register scratch,
+    Label* gc_required,
+    bool result_contains_top_on_entry) {
+  ASSERT(!result.is(result_end));
+
+  // Load address of new object into result.
+  LoadAllocationTopHelper(result,
+                          result_end,
+                          scratch,
+                          result_contains_top_on_entry);
+
+  // Calculate new top and bail out if new space is exhausted.
+  ExternalReference new_space_allocation_limit =
+      ExternalReference::new_space_allocation_limit_address();
+  lea(result_end, Operand(result, element_count, element_size, header_size));
+  cmp(result_end, Operand::StaticVariable(new_space_allocation_limit));
+  j(above, gc_required);
+
+  // Update allocation top.
+  UpdateAllocationTopHelper(result_end, scratch);
+}
+
+
+void MacroAssembler::AllocateObjectInNewSpace(
+    Register object_size,
+    Register result,
+    Register result_end,
+    Register scratch,
+    Label* gc_required,
+    bool result_contains_top_on_entry) {
+  ASSERT(!result.is(result_end));
+
+  // Load address of new object into result.
+  LoadAllocationTopHelper(result,
+                          result_end,
+                          scratch,
+                          result_contains_top_on_entry);
+
+
+  // Calculate new top and bail out if new space is exhausted.
+  ExternalReference new_space_allocation_limit =
+      ExternalReference::new_space_allocation_limit_address();
+  if (!object_size.is(result_end)) {
+    mov(result_end, object_size);
+  }
+  add(result_end, Operand(result));
+  cmp(result_end, Operand::StaticVariable(new_space_allocation_limit));
+  j(above, gc_required, not_taken);
+
+  // Update allocation top.
+  UpdateAllocationTopHelper(result_end, scratch);
+}
+
+
+void MacroAssembler::UndoAllocationInNewSpace(Register object) {
+  ExternalReference new_space_allocation_top =
+      ExternalReference::new_space_allocation_top_address();
+
+  // Make sure the object has no tag before resetting top.
+  and_(Operand(object), Immediate(~kHeapObjectTagMask));
+#ifdef DEBUG
+  cmp(object, Operand::StaticVariable(new_space_allocation_top));
+  Check(below, "Undo allocation of non allocated memory");
+#endif
+  mov(Operand::StaticVariable(new_space_allocation_top), object);
+}
+
+
 void MacroAssembler::NegativeZeroTest(CodeGenerator* cgen,
                                       Register result,
                                       Register op,
diff --git a/deps/v8/src/ia32/macro-assembler-ia32.h b/deps/v8/src/ia32/macro-assembler-ia32.h
index 42620dd8c..f10ec16aa 100644
--- a/deps/v8/src/ia32/macro-assembler-ia32.h
+++ b/deps/v8/src/ia32/macro-assembler-ia32.h
@@ -184,6 +184,48 @@ class MacroAssembler: public Assembler {
 
 
   // ---------------------------------------------------------------------------
+  // Allocation support
+
+  // Allocate an object in new space. If the new space is exhausted control
+  // continues at the gc_required label. The allocated object is returned in
+  // result and end of the new object is returned in result_end. The register
+  // scratch can be passed as no_reg in which case an additional object
+  // reference will be added to the reloc info. The returned pointers in result
+  // and result_end have not yet been tagged as heap objects. If
+  // result_contains_top_on_entry is true the contnt of result is known to be
+  // the allocation top on entry (could be result_end from a previous call to
+  // AllocateObjectInNewSpace). If result_contains_top_on_entry is true scratch
+  // should be no_reg as it is never used.
+  void AllocateObjectInNewSpace(int object_size,
+                                Register result,
+                                Register result_end,
+                                Register scratch,
+                                Label* gc_required,
+                                bool result_contains_top_on_entry);
+
+  void AllocateObjectInNewSpace(int header_size,
+                                ScaleFactor element_size,
+                                Register element_count,
+                                Register result,
+                                Register result_end,
+                                Register scratch,
+                                Label* gc_required,
+                                bool result_contains_top_on_entry);
+
+  void AllocateObjectInNewSpace(Register object_size,
+                                Register result,
+                                Register result_end,
+                                Register scratch,
+                                Label* gc_required,
+                                bool result_contains_top_on_entry);
+
+  // Undo allocation in new space. The object passed and objects allocated after
+  // it will no longer be allocated. Make sure that no pointers are left to the
+  // object(s) no longer allocated as they would be invalid when allocation is
+  // un-done.
+  void UndoAllocationInNewSpace(Register object);
+
+  // ---------------------------------------------------------------------------
   // Support functions.
 
   // Check if result is zero and op is negative.
@@ -303,6 +345,13 @@ class MacroAssembler: public Assembler {
   // Activation support.
   void EnterFrame(StackFrame::Type type);
   void LeaveFrame(StackFrame::Type type);
+
+  // Allocation support helpers.
+  void LoadAllocationTopHelper(Register result,
+                               Register result_end,
+                               Register scratch,
+                               bool result_contains_top_on_entry);
+  void UpdateAllocationTopHelper(Register result_end, Register scratch);
 };
 
 
diff --git a/deps/v8/src/ia32/regexp-macro-assembler-ia32.cc b/deps/v8/src/ia32/regexp-macro-assembler-ia32.cc
index bc8107633..7af4e89e0 100644
--- a/deps/v8/src/ia32/regexp-macro-assembler-ia32.cc
+++ b/deps/v8/src/ia32/regexp-macro-assembler-ia32.cc
@@ -102,6 +102,7 @@ RegExpMacroAssemblerIA32::RegExpMacroAssemblerIA32(
       success_label_(),
       backtrack_label_(),
       exit_label_() {
+  ASSERT_EQ(0, registers_to_save % 2);
   __ jmp(&entry_label_);   // We'll write the entry code later.
   __ bind(&start_label_);  // And then continue from here.
 }
@@ -337,8 +338,9 @@ void RegExpMacroAssemblerIA32::CheckNotBackReferenceIgnoreCase(
     __ add(edx, Operand(esi));
     __ mov(Operand(esp, 0 * kPointerSize), edx);
 
-    Address function_address = FUNCTION_ADDR(&CaseInsensitiveCompareUC16);
-    CallCFunction(function_address, argument_count);
+    ExternalReference compare =
+        ExternalReference::re_case_insensitive_compare_uc16();
+    CallCFunction(compare, argument_count);
     // Pop original values before reacting on result value.
     __ pop(ebx);
     __ pop(backtrack_stackpointer());
@@ -745,7 +747,8 @@ Handle<Object> RegExpMacroAssemblerIA32::GetCode(Handle<String> source) {
     __ lea(eax, Operand(ebp, kStackHighEnd));
     __ mov(Operand(esp, 1 * kPointerSize), eax);
     __ mov(Operand(esp, 0 * kPointerSize), backtrack_stackpointer());
-    CallCFunction(FUNCTION_ADDR(&GrowStack), num_arguments);
+    ExternalReference grow_stack = ExternalReference::re_grow_stack();
+    CallCFunction(grow_stack, num_arguments);
     // If return NULL, we have failed to grow the stack, and
     // must exit with a stack-overflow exception.
     __ or_(eax, Operand(eax));
@@ -817,7 +820,9 @@ void RegExpMacroAssemblerIA32::LoadCurrentCharacter(int cp_offset,
                                                     int characters) {
   ASSERT(cp_offset >= -1);      // ^ and \b can look behind one character.
   ASSERT(cp_offset < (1<<30));  // Be sane! (And ensure negation works)
-  CheckPosition(cp_offset + characters - 1, on_end_of_input);
+  if (check_bounds) {
+    CheckPosition(cp_offset + characters - 1, on_end_of_input);
+  }
   LoadCurrentCharacterUnchecked(cp_offset, characters);
 }
 
@@ -913,7 +918,9 @@ void RegExpMacroAssemblerIA32::CallCheckStackGuardState(Register scratch) {
   // Next address on the stack (will be address of return address).
   __ lea(eax, Operand(esp, -kPointerSize));
   __ mov(Operand(esp, 0 * kPointerSize), eax);
-  CallCFunction(FUNCTION_ADDR(&CheckStackGuardState), num_arguments);
+  ExternalReference check_stack_guard =
+      ExternalReference::re_check_stack_guard_state();
+  CallCFunction(check_stack_guard, num_arguments);
 }
 
 
@@ -996,22 +1003,6 @@ int RegExpMacroAssemblerIA32::CheckStackGuardState(Address* return_address,
 }
 
 
-Address RegExpMacroAssemblerIA32::GrowStack(Address stack_pointer,
-                                            Address* stack_base) {
-  size_t size = RegExpStack::stack_capacity();
-  Address old_stack_base = RegExpStack::stack_base();
-  ASSERT(old_stack_base == *stack_base);
-  ASSERT(stack_pointer <= old_stack_base);
-  ASSERT(static_cast<size_t>(old_stack_base - stack_pointer) <= size);
-  Address new_stack_base = RegExpStack::EnsureCapacity(size * 2);
-  if (new_stack_base == NULL) {
-    return NULL;
-  }
-  *stack_base = new_stack_base;
-  return new_stack_base - (old_stack_base - stack_pointer);
-}
-
-
 Operand RegExpMacroAssemblerIA32::register_location(int register_index) {
   ASSERT(register_index < (1<<30));
   if (num_registers_ <= register_index) {
@@ -1135,9 +1126,9 @@ void RegExpMacroAssemblerIA32::FrameAlign(int num_arguments, Register scratch) {
 }
 
 
-void RegExpMacroAssemblerIA32::CallCFunction(Address function_address,
+void RegExpMacroAssemblerIA32::CallCFunction(ExternalReference function,
                                              int num_arguments) {
-  __ mov(Operand(eax), Immediate(reinterpret_cast<int32_t>(function_address)));
+  __ mov(Operand(eax), Immediate(function));
   __ call(Operand(eax));
   if (OS::ActivationFrameAlignment() != 0) {
     __ mov(esp, Operand(esp, num_arguments * kPointerSize));
@@ -1172,6 +1163,10 @@ void RegExpMacroAssemblerIA32::LoadCurrentCharacterUnchecked(int cp_offset,
 }
 
 
+void RegExpCEntryStub::Generate(MacroAssembler* masm_) {
+  __ int3();  // Unused on ia32.
+}
+
 #undef __
 
 #endif  // V8_NATIVE_REGEXP
diff --git a/deps/v8/src/ia32/regexp-macro-assembler-ia32.h b/deps/v8/src/ia32/regexp-macro-assembler-ia32.h
index d11439299..5ffd46275 100644
--- a/deps/v8/src/ia32/regexp-macro-assembler-ia32.h
+++ b/deps/v8/src/ia32/regexp-macro-assembler-ia32.h
@@ -107,6 +107,13 @@ class RegExpMacroAssemblerIA32: public NativeRegExpMacroAssembler {
   virtual void ClearRegisters(int reg_from, int reg_to);
   virtual void WriteStackPointerToRegister(int reg);
 
+  // Called from RegExp if the stack-guard is triggered.
+  // If the code object is relocated, the return address is fixed before
+  // returning.
+  static int CheckStackGuardState(Address* return_address,
+                                  Code* re_code,
+                                  Address re_frame);
+
  private:
   // Offsets from ebp of function parameters and stored registers.
   static const int kFramePointer = 0;
@@ -144,23 +151,9 @@ class RegExpMacroAssemblerIA32: public NativeRegExpMacroAssembler {
   // Check whether we are exceeding the stack limit on the backtrack stack.
   void CheckStackLimit();
 
-  // Called from RegExp if the stack-guard is triggered.
-  // If the code object is relocated, the return address is fixed before
-  // returning.
-  static int CheckStackGuardState(Address* return_address,
-                                  Code* re_code,
-                                  Address re_frame);
-
   // Generate a call to CheckStackGuardState.
   void CallCheckStackGuardState(Register scratch);
 
-  // Called from RegExp if the backtrack stack limit is hit.
-  // Tries to expand the stack. Returns the new stack-pointer if
-  // successful, and updates the stack_top address, or returns 0 if unable
-  // to grow the stack.
-  // This function must not trigger a garbage collection.
-  static Address GrowStack(Address stack_pointer, Address* stack_top);
-
   // The ebp-relative location of a regexp register.
   Operand register_location(int register_index);
 
@@ -209,7 +202,7 @@ class RegExpMacroAssemblerIA32: public NativeRegExpMacroAssembler {
   // by FrameAlign. The called function is not allowed to trigger a garbage
   // collection, since that might move the code and invalidate the return
   // address (unless this is somehow accounted for).
-  inline void CallCFunction(Address function_address, int num_arguments);
+  inline void CallCFunction(ExternalReference function, int num_arguments);
 
   MacroAssembler* masm_;
 
diff --git a/deps/v8/src/ia32/simulator-ia32.h b/deps/v8/src/ia32/simulator-ia32.h
index 4d02c03ab..3bed2681f 100644
--- a/deps/v8/src/ia32/simulator-ia32.h
+++ b/deps/v8/src/ia32/simulator-ia32.h
@@ -44,4 +44,9 @@
   (reinterpret_cast<uintptr_t>(this) >= limit ? \
       reinterpret_cast<uintptr_t>(this) - limit : 0)
 
+// Call the generated regexp code directly. The entry function pointer should
+// expect seven int/pointer sized arguments and return an int.
+#define CALL_GENERATED_REGEXP_CODE(entry, p0, p1, p2, p3, p4, p5, p6) \
+  entry(p0, p1, p2, p3, p4, p5, p6)
+
 #endif  // V8_IA32_SIMULATOR_IA32_H_
diff --git a/deps/v8/src/ia32/stub-cache-ia32.cc b/deps/v8/src/ia32/stub-cache-ia32.cc
index a626377e4..049c57e4f 100644
--- a/deps/v8/src/ia32/stub-cache-ia32.cc
+++ b/deps/v8/src/ia32/stub-cache-ia32.cc
@@ -1740,6 +1740,135 @@ Object* KeyedLoadStubCompiler::CompileLoadFunctionPrototype(String* name) {
 }
 
 
+// Specialized stub for constructing objects from functions which only have only
+// simple assignments of the form this.x = ...; in their body.
+Object* ConstructStubCompiler::CompileConstructStub(
+    SharedFunctionInfo* shared) {
+  // ----------- S t a t e -------------
+  //  -- eax : argc
+  //  -- edi : constructor
+  //  -- esp[0] : return address
+  //  -- esp[4] : last argument
+  // -----------------------------------
+  Label generic_stub_call;
+#ifdef ENABLE_DEBUGGER_SUPPORT
+  // Check to see whether there are any break points in the function code. If
+  // there are jump to the generic constructor stub which calls the actual
+  // code for the function thereby hitting the break points.
+  __ mov(ebx, FieldOperand(edi, JSFunction::kSharedFunctionInfoOffset));
+  __ mov(ebx, FieldOperand(ebx, SharedFunctionInfo::kDebugInfoOffset));
+  __ cmp(ebx, Factory::undefined_value());
+  __ j(not_equal, &generic_stub_call, not_taken);
+#endif
+
+  // Load the initial map and verify that it is in fact a map.
+  __ mov(ebx, FieldOperand(edi, JSFunction::kPrototypeOrInitialMapOffset));
+  // Will both indicate a NULL and a Smi.
+  __ test(ebx, Immediate(kSmiTagMask));
+  __ j(zero, &generic_stub_call);
+  __ CmpObjectType(ebx, MAP_TYPE, ecx);
+  __ j(not_equal, &generic_stub_call);
+
+#ifdef DEBUG
+  // Cannot construct functions this way.
+  // edi: constructor
+  // ebx: initial map
+  __ CmpInstanceType(ebx, JS_FUNCTION_TYPE);
+  __ Assert(not_equal, "Function constructed by construct stub.");
+#endif
+
+  // Now allocate the JSObject on the heap by moving the new space allocation
+  // top forward.
+  // edi: constructor
+  // ebx: initial map
+  __ movzx_b(ecx, FieldOperand(ebx, Map::kInstanceSizeOffset));
+  __ shl(ecx, kPointerSizeLog2);
+  // Make sure that the maximum heap object size will never cause us
+  // problems here.
+  ASSERT(Heap::MaxObjectSizeInPagedSpace() >= JSObject::kMaxInstanceSize);
+  __ AllocateObjectInNewSpace(ecx, edx, ecx, no_reg, &generic_stub_call, false);
+
+  // Allocated the JSObject, now initialize the fields and add the heap tag.
+  // ebx: initial map
+  // edx: JSObject (untagged)
+  __ mov(Operand(edx, JSObject::kMapOffset), ebx);
+  __ mov(ebx, Factory::empty_fixed_array());
+  __ mov(Operand(edx, JSObject::kPropertiesOffset), ebx);
+  __ mov(Operand(edx, JSObject::kElementsOffset), ebx);
+
+  // Push the allocated object to the stack. This is the object that will be
+  // returned (after it is tagged).
+  __ push(edx);
+
+  // eax: argc
+  // edx: JSObject (untagged)
+  // Load the address of the first in-object property into edx.
+  __ lea(edx, Operand(edx, JSObject::kHeaderSize));
+  // Calculate the location of the first argument. The stack contains the
+  // allocated object and the return address on top of the argc arguments.
+  __ lea(ecx, Operand(esp, eax, times_4, 1 * kPointerSize));
+
+  // Use edi for holding undefined which is used in several places below.
+  __ mov(edi, Factory::undefined_value());
+
+  // eax: argc
+  // ecx: first argument
+  // edx: first in-object property of the JSObject
+  // edi: undefined
+  // Fill the initialized properties with a constant value or a passed argument
+  // depending on the this.x = ...; assignment in the function.
+  for (int i = 0; i < shared->this_property_assignments_count(); i++) {
+    if (shared->IsThisPropertyAssignmentArgument(i)) {
+      Label not_passed;
+      // Set the property to undefined.
+      __ mov(Operand(edx, i * kPointerSize), edi);
+      // Check if the argument assigned to the property is actually passed.
+      int arg_number = shared->GetThisPropertyAssignmentArgument(i);
+      __ cmp(eax, arg_number);
+      __ j(below_equal, &not_passed);
+      // Argument passed - find it on the stack.
+      __ mov(ebx, Operand(ecx, arg_number * -kPointerSize));
+      __ mov(Operand(edx, i * kPointerSize), ebx);
+      __ bind(&not_passed);
+    } else {
+      // Set the property to the constant value.
+      Handle<Object> constant(shared->GetThisPropertyAssignmentConstant(i));
+      __ mov(Operand(edx, i * kPointerSize), Immediate(constant));
+    }
+  }
+
+  // Fill the unused in-object property fields with undefined.
+  for (int i = shared->this_property_assignments_count();
+       i < shared->CalculateInObjectProperties();
+       i++) {
+    __ mov(Operand(edx, i * kPointerSize), edi);
+  }
+
+  // Move argc to ebx and retrieve and tag the JSObject to return.
+  __ mov(ebx, eax);
+  __ pop(eax);
+  __ or_(Operand(eax), Immediate(kHeapObjectTag));
+
+  // Remove caller arguments and receiver from the stack and return.
+  __ pop(ecx);
+  __ lea(esp, Operand(esp, ebx, times_pointer_size, 1 * kPointerSize));
+  __ push(ecx);
+  __ IncrementCounter(&Counters::constructed_objects, 1);
+  __ IncrementCounter(&Counters::constructed_objects_stub, 1);
+  __ ret(0);
+
+  // Jump to the generic stub in case the specialized code cannot handle the
+  // construction.
+  __ bind(&generic_stub_call);
+  Code* code = Builtins::builtin(Builtins::JSConstructStubGeneric);
+  Handle<Code> generic_construct_stub(code);
+  __ jmp(generic_construct_stub, RelocInfo::CODE_TARGET);
+
+  // Return the generated code.
+  return GetCode();
+}
+
+
 #undef __
 
 } }  // namespace v8::internal
diff --git a/deps/v8/src/jsregexp.cc b/deps/v8/src/jsregexp.cc
index 06208aa50..e518662d0 100644
--- a/deps/v8/src/jsregexp.cc
+++ b/deps/v8/src/jsregexp.cc
@@ -51,6 +51,7 @@
 #include "x64/macro-assembler-x64.h"
 #include "x64/regexp-macro-assembler-x64.h"
 #elif V8_TARGET_ARCH_ARM
+#include "arm/macro-assembler-arm.h"
 #include "arm/regexp-macro-assembler-arm.h"
 #else
 #error Unsupported target architecture.
@@ -419,9 +420,7 @@ Handle<Object> RegExpImpl::IrregexpExec(Handle<JSRegExp> jsregexp,
   Handle<FixedArray> regexp(FixedArray::cast(jsregexp->data()));
 
 #ifdef V8_NATIVE_REGEXP
-#ifdef V8_TARGET_ARCH_ARM
-  UNIMPLEMENTED();
-#else  // Native regexp supported.
+
   OffsetsVector captures(number_of_capture_registers);
   int* captures_vector = captures.vector();
   NativeRegExpMacroAssembler::Result res;
@@ -455,9 +454,9 @@ Handle<Object> RegExpImpl::IrregexpExec(Handle<JSRegExp> jsregexp,
     SetCapture(*array, i, captures_vector[i]);
     SetCapture(*array, i + 1, captures_vector[i + 1]);
   }
-#endif  // Native regexp supported.
 
 #else  // ! V8_NATIVE_REGEXP
+
   bool is_ascii = subject->IsAsciiRepresentation();
   if (!EnsureCompiledIrregexp(jsregexp, is_ascii)) {
     return Handle<Object>::null();
@@ -487,6 +486,7 @@ Handle<Object> RegExpImpl::IrregexpExec(Handle<JSRegExp> jsregexp,
     SetCapture(*array, i, register_vector[i]);
     SetCapture(*array, i + 1, register_vector[i + 1]);
   }
+
 #endif  // V8_NATIVE_REGEXP
 
   SetLastCaptureCount(*array, number_of_capture_registers);
@@ -1723,6 +1723,8 @@ bool RegExpNode::EmitQuickCheck(RegExpCompiler* compiler,
   GetQuickCheckDetails(details, compiler, 0, trace->at_start() == Trace::FALSE);
   if (details->cannot_match()) return false;
   if (!details->Rationalize(compiler->ascii())) return false;
+  ASSERT(details->characters() == 1 ||
+         compiler->macro_assembler()->CanReadUnaligned());
   uint32_t mask = details->mask();
   uint32_t value = details->value();
 
@@ -2522,20 +2524,20 @@ void LoopChoiceNode::Emit(RegExpCompiler* compiler, Trace* trace) {
 
 int ChoiceNode::CalculatePreloadCharacters(RegExpCompiler* compiler) {
   int preload_characters = EatsAtLeast(4, 0);
-#ifdef V8_HOST_CAN_READ_UNALIGNED
-  bool ascii = compiler->ascii();
-  if (ascii) {
-    if (preload_characters > 4) preload_characters = 4;
-    // We can't preload 3 characters because there is no machine instruction
-    // to do that.  We can't just load 4 because we could be reading
-    // beyond the end of the string, which could cause a memory fault.
-    if (preload_characters == 3) preload_characters = 2;
+  if (compiler->macro_assembler()->CanReadUnaligned()) {
+    bool ascii = compiler->ascii();
+    if (ascii) {
+      if (preload_characters > 4) preload_characters = 4;
+      // We can't preload 3 characters because there is no machine instruction
+      // to do that.  We can't just load 4 because we could be reading
+      // beyond the end of the string, which could cause a memory fault.
+      if (preload_characters == 3) preload_characters = 2;
+    } else {
+      if (preload_characters > 2) preload_characters = 2;
+    }
   } else {
-    if (preload_characters > 2) preload_characters = 2;
+    if (preload_characters > 1) preload_characters = 1;
   }
-#else
-  if (preload_characters > 1) preload_characters = 1;
-#endif
   return preload_characters;
 }
 
@@ -4470,16 +4472,12 @@ RegExpEngine::CompilationResult RegExpEngine::Compile(RegExpCompileData* data,
       is_ascii ? NativeRegExpMacroAssembler::ASCII
                : NativeRegExpMacroAssembler::UC16;
 
-#ifdef V8_TARGET_ARCH_IA32
-  RegExpMacroAssemblerIA32 macro_assembler(mode,
-                                           (data->capture_count + 1) * 2);
-#endif
-#ifdef V8_TARGET_ARCH_X64
-  RegExpMacroAssemblerX64 macro_assembler(mode,
-                                          (data->capture_count + 1) * 2);
-#endif
-#ifdef V8_TARGET_ARCH_ARM
-  UNIMPLEMENTED();
+#if V8_TARGET_ARCH_IA32
+  RegExpMacroAssemblerIA32 macro_assembler(mode, (data->capture_count + 1) * 2);
+#elif V8_TARGET_ARCH_X64
+  RegExpMacroAssemblerX64 macro_assembler(mode, (data->capture_count + 1) * 2);
+#elif V8_TARGET_ARCH_ARM
+  RegExpMacroAssemblerARM macro_assembler(mode, (data->capture_count + 1) * 2);
 #endif
 
 #else  // ! V8_NATIVE_REGEXP
diff --git a/deps/v8/src/mark-compact.cc b/deps/v8/src/mark-compact.cc
index 10e81ac6a..d139093a1 100644
--- a/deps/v8/src/mark-compact.cc
+++ b/deps/v8/src/mark-compact.cc
@@ -76,7 +76,7 @@ void MarkCompactCollector::CollectGarbage() {
 
   SweepLargeObjectSpace();
 
-  if (compacting_collection_) {
+  if (IsCompacting()) {
     EncodeForwardingAddresses();
 
     UpdatePointers();
diff --git a/deps/v8/src/messages.js b/deps/v8/src/messages.js
index 8328fe5c4..255e54409 100644
--- a/deps/v8/src/messages.js
+++ b/deps/v8/src/messages.js
@@ -163,7 +163,7 @@ function FormatMessage(message) {
       illegal_break:                "Illegal break statement",
       illegal_continue:             "Illegal continue statement",
       illegal_return:               "Illegal return statement",
-      error_loading_debugger:       "Error loading debugger %0",
+      error_loading_debugger:       "Error loading debugger",
       no_input_to_regexp:           "No input to %0",
       result_not_primitive:         "Result of %0 must be a primitive, was %1",
       invalid_json:                 "String '%0' is not valid JSON",
diff --git a/deps/v8/src/objects-debug.cc b/deps/v8/src/objects-debug.cc
index f71317117..ef4aae531 100644
--- a/deps/v8/src/objects-debug.cc
+++ b/deps/v8/src/objects-debug.cc
@@ -463,6 +463,8 @@ void Map::MapPrint() {
   PrintF(" - type: %s\n", TypeToString(instance_type()));
   PrintF(" - instance size: %d\n", instance_size());
   PrintF(" - inobject properties: %d\n", inobject_properties());
+  PrintF(" - pre-allocated property fields: %d\n",
+      pre_allocated_property_fields());
   PrintF(" - unused property fields: %d\n", unused_property_fields());
   if (is_hidden_prototype()) {
     PrintF(" - hidden_prototype\n");
diff --git a/deps/v8/src/objects-inl.h b/deps/v8/src/objects-inl.h
index 7f3628d8d..cabc8a218 100644
--- a/deps/v8/src/objects-inl.h
+++ b/deps/v8/src/objects-inl.h
@@ -131,7 +131,7 @@ bool Object::IsSmi() {
 
 
 bool Object::IsHeapObject() {
-  return HAS_HEAP_OBJECT_TAG(this);
+  return Internals::HasHeapObjectTag(this);
 }
 
 
@@ -300,6 +300,10 @@ uint32_t StringShape::full_representation_tag() {
 }
 
 
+STATIC_CHECK((kStringRepresentationMask | kStringEncodingMask) ==
+             Internals::kFullStringRepresentationMask);
+
+
 uint32_t StringShape::size_tag() {
   return (type_ & kStringSizeMask);
 }
@@ -325,6 +329,10 @@ bool StringShape::IsExternalTwoByte() {
 }
 
 
+STATIC_CHECK((kExternalStringTag | kTwoByteStringTag) ==
+             Internals::kExternalTwoByteRepresentationTag);
+
+
 uc32 FlatStringReader::Get(int index) {
   ASSERT(0 <= index && index <= length_);
   if (is_ascii_) {
@@ -730,7 +738,7 @@ Object** HeapObject::RawField(HeapObject* obj, int byte_offset) {
 
 
 int Smi::value() {
-  return static_cast<int>(reinterpret_cast<intptr_t>(this)) >> kSmiTagSize;
+  return Internals::SmiValue(this);
 }
 
 
diff --git a/deps/v8/src/objects.cc b/deps/v8/src/objects.cc
index e4a3a67a5..9ea131fa7 100644
--- a/deps/v8/src/objects.cc
+++ b/deps/v8/src/objects.cc
@@ -2923,6 +2923,20 @@ Object* Map::CopyDropDescriptors() {
   // Please note instance_type and instance_size are set when allocated.
   Map::cast(result)->set_inobject_properties(inobject_properties());
   Map::cast(result)->set_unused_property_fields(unused_property_fields());
+
+  // If the map has pre-allocated properties always start out with a descriptor
+  // array describing these properties.
+  if (pre_allocated_property_fields() > 0) {
+    ASSERT(constructor()->IsJSFunction());
+    JSFunction* ctor = JSFunction::cast(constructor());
+    Object* descriptors =
+        ctor->initial_map()->instance_descriptors()->RemoveTransitions();
+    if (descriptors->IsFailure()) return descriptors;
+    Map::cast(result)->set_instance_descriptors(
+        DescriptorArray::cast(descriptors));
+    Map::cast(result)->set_pre_allocated_property_fields(
+        pre_allocated_property_fields());
+  }
   Map::cast(result)->set_bit_field(bit_field());
   Map::cast(result)->set_bit_field2(bit_field2());
   Map::cast(result)->ClearCodeCache();
@@ -4800,7 +4814,6 @@ void SharedFunctionInfo::SetThisPropertyAssignmentsInfo(
     bool only_this_property_assignments,
     bool only_simple_this_property_assignments,
     FixedArray* assignments) {
-  ASSERT(this_property_assignments()->IsUndefined());
   set_compiler_hints(BooleanBit::set(compiler_hints(),
                                      kHasOnlyThisPropertyAssignments,
                                      only_this_property_assignments));
@@ -4812,6 +4825,18 @@ void SharedFunctionInfo::SetThisPropertyAssignmentsInfo(
 }
 
 
+void SharedFunctionInfo::ClearThisPropertyAssignmentsInfo() {
+  set_compiler_hints(BooleanBit::set(compiler_hints(),
+                                     kHasOnlyThisPropertyAssignments,
+                                     false));
+  set_compiler_hints(BooleanBit::set(compiler_hints(),
+                                     kHasOnlySimpleThisPropertyAssignments,
+                                     false));
+  set_this_property_assignments(Heap::undefined_value());
+  set_this_property_assignments_count(0);
+}
+
+
 String* SharedFunctionInfo::GetThisPropertyAssignmentName(int index) {
   Object* obj = this_property_assignments();
   ASSERT(obj->IsFixedArray());
@@ -4822,6 +4847,32 @@ String* SharedFunctionInfo::GetThisPropertyAssignmentName(int index) {
 }
 
 
+bool SharedFunctionInfo::IsThisPropertyAssignmentArgument(int index) {
+  Object* obj = this_property_assignments();
+  ASSERT(obj->IsFixedArray());
+  ASSERT(index < this_property_assignments_count());
+  obj = FixedArray::cast(obj)->get(index * 3 + 1);
+  return Smi::cast(obj)->value() != -1;
+}
+
+
+int SharedFunctionInfo::GetThisPropertyAssignmentArgument(int index) {
+  ASSERT(IsThisPropertyAssignmentArgument(index));
+  Object* obj =
+      FixedArray::cast(this_property_assignments())->get(index * 3 + 1);
+  return Smi::cast(obj)->value();
+}
+
+
+Object* SharedFunctionInfo::GetThisPropertyAssignmentConstant(int index) {
+  ASSERT(!IsThisPropertyAssignmentArgument(index));
+  Object* obj =
+      FixedArray::cast(this_property_assignments())->get(index * 3 + 2);
+  return obj;
+}
+
+
+
 // Support function for printing the source code to a StringStream
 // without any allocation in the heap.
 void SharedFunctionInfo::SourceCodePrint(StringStream* accumulator,
diff --git a/deps/v8/src/objects.h b/deps/v8/src/objects.h
index 763752b27..3f6f5fff5 100644
--- a/deps/v8/src/objects.h
+++ b/deps/v8/src/objects.h
@@ -1234,6 +1234,8 @@ class HeapObject: public Object {
   static const int kMapOffset = Object::kHeaderSize;
   static const int kHeaderSize = kMapOffset + kPointerSize;
 
+  STATIC_CHECK(kMapOffset == Internals::kHeapObjectMapOffset);
+
  protected:
   // helpers for calling an ObjectVisitor to iterate over pointers in the
   // half-open range [start, end) specified as integer offsets
@@ -1664,6 +1666,8 @@ class JSObject: public HeapObject {
   static const int kElementsOffset = kPropertiesOffset + kPointerSize;
   static const int kHeaderSize = kElementsOffset + kPointerSize;
 
+  STATIC_CHECK(kHeaderSize == Internals::kJSObjectHeaderSize);
+
   Object* GetElementWithInterceptor(JSObject* receiver, uint32_t index);
 
  private:
@@ -2631,7 +2635,7 @@ class Code: public HeapObject {
   int ExecutableSize() {
     // Check that the assumptions about the layout of the code object holds.
     ASSERT_EQ(instruction_start() - address(),
-              Code::kHeaderSize);
+              static_cast<intptr_t>(Code::kHeaderSize));
     return instruction_size() + Code::kHeaderSize;
   }
 
@@ -2897,6 +2901,8 @@ class Map: public HeapObject {
   static const int kBitFieldOffset = kInstanceAttributesOffset + 2;
   static const int kBitField2Offset = kInstanceAttributesOffset + 3;
 
+  STATIC_CHECK(kInstanceTypeOffset == Internals::kMapInstanceTypeOffset);
+
   // Bit positions for bit field.
   static const int kUnused = 0;  // To be used for marking recently used maps.
   static const int kHasNonInstancePrototype = 1;
@@ -3108,6 +3114,9 @@ class SharedFunctionInfo: public HeapObject {
       bool has_only_simple_this_property_assignments,
       FixedArray* this_property_assignments);
 
+  // Clear information on assignments of the form this.x = ...;
+  void ClearThisPropertyAssignmentsInfo();
+
   // Indicate that this function only consists of assignments of the form
   // this.x = ...;.
   inline bool has_only_this_property_assignments();
@@ -3122,6 +3131,9 @@ class SharedFunctionInfo: public HeapObject {
   inline int this_property_assignments_count();
   inline void set_this_property_assignments_count(int value);
   String* GetThisPropertyAssignmentName(int index);
+  bool IsThisPropertyAssignmentArgument(int index);
+  int GetThisPropertyAssignmentArgument(int index);
+  Object* GetThisPropertyAssignmentConstant(int index);
 
   // [source code]: Source code for the function.
   bool HasSourceCode();
@@ -4128,6 +4140,8 @@ class ExternalString: public String {
   static const int kResourceOffset = POINTER_SIZE_ALIGN(String::kSize);
   static const int kSize = kResourceOffset + kPointerSize;
 
+  STATIC_CHECK(kResourceOffset == Internals::kStringResourceOffset);
+
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(ExternalString);
 };
@@ -4341,6 +4355,8 @@ class Proxy: public HeapObject {
   static const int kProxyOffset = HeapObject::kHeaderSize;
   static const int kSize = kProxyOffset + kPointerSize;
 
+  STATIC_CHECK(kProxyOffset == Internals::kProxyProxyOffset);
+
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(Proxy);
 };
diff --git a/deps/v8/src/parser.cc b/deps/v8/src/parser.cc
index 5cc6341f9..0abb9ed77 100644
--- a/deps/v8/src/parser.cc
+++ b/deps/v8/src/parser.cc
@@ -2397,12 +2397,6 @@ Statement* Parser::ParseWithStatement(ZoneStringList* labels, bool* ok) {
   // WithStatement ::
   //   'with' '(' Expression ')' Statement
 
-  // We do not allow the use of 'with' statements in the internal JS
-  // code. If 'with' statements were allowed, the simplified setup of
-  // the runtime context chain would allow access to properties in the
-  // global object from within a 'with' statement.
-  ASSERT(extension_ != NULL || !Bootstrapper::IsActive());
-
   Expect(Token::WITH, CHECK_OK);
   Expect(Token::LPAREN, CHECK_OK);
   Expression* expr = ParseExpression(true, CHECK_OK);
@@ -3088,9 +3082,6 @@ Expression* Parser::ParseLeftHandSideExpression(bool* ok) {
             Handle<String> name = callee->name();
             Variable* var = top_scope_->Lookup(name);
             if (var == NULL) {
-              // We do not allow direct calls to 'eval' in our internal
-              // JS files. Use builtin functions instead.
-              ASSERT(extension_ != NULL || !Bootstrapper::IsActive());
               top_scope_->RecordEvalCall();
               is_potentially_direct_eval = true;
             }
diff --git a/deps/v8/src/platform-win32.cc b/deps/v8/src/platform-win32.cc
index de6cd125b..d4a183d94 100644
--- a/deps/v8/src/platform-win32.cc
+++ b/deps/v8/src/platform-win32.cc
@@ -1317,8 +1317,11 @@ double OS::nan_value() {
 
 
 int OS::ActivationFrameAlignment() {
-  // Floating point code runs faster if the stack is 8-byte aligned.
-  return 8;
+#ifdef _WIN64
+  return 16;  // Windows 64-bit ABI requires the stack to be 16-byte aligned.
+#else
+  return 8;  // Floating-point math runs faster with 8-byte alignment.
+#endif
 }
 
 
diff --git a/deps/v8/src/regexp-macro-assembler-irregexp-inl.h b/deps/v8/src/regexp-macro-assembler-irregexp-inl.h
index 5074f210a..b487468ef 100644
--- a/deps/v8/src/regexp-macro-assembler-irregexp-inl.h
+++ b/deps/v8/src/regexp-macro-assembler-irregexp-inl.h
@@ -38,6 +38,7 @@
 namespace v8 {
 namespace internal {
 
+#ifndef V8_NATIVE_REGEXP
 
 void RegExpMacroAssemblerIrregexp::Emit(uint32_t byte,
                                         uint32_t twenty_four_bits) {
@@ -70,6 +71,7 @@ void RegExpMacroAssemblerIrregexp::Emit32(uint32_t word) {
   pc_ += 4;
 }
 
+#endif  // ! V8_NATIVE_REGEXP
 
 } }  // namespace v8::internal
 
diff --git a/deps/v8/src/regexp-macro-assembler-irregexp.cc b/deps/v8/src/regexp-macro-assembler-irregexp.cc
index 21b622ef0..f9c7eeee0 100644
--- a/deps/v8/src/regexp-macro-assembler-irregexp.cc
+++ b/deps/v8/src/regexp-macro-assembler-irregexp.cc
@@ -36,6 +36,7 @@
 namespace v8 {
 namespace internal {
 
+#ifndef V8_NATIVE_REGEXP
 
 RegExpMacroAssemblerIrregexp::RegExpMacroAssemblerIrregexp(Vector<byte> buffer)
     : buffer_(buffer),
@@ -458,5 +459,6 @@ void RegExpMacroAssemblerIrregexp::Expand() {
   }
 }
 
+#endif  // !V8_NATIVE_REGEXP
 
 } }  // namespace v8::internal
diff --git a/deps/v8/src/regexp-macro-assembler-irregexp.h b/deps/v8/src/regexp-macro-assembler-irregexp.h
index dd64e7ae8..642a28390 100644
--- a/deps/v8/src/regexp-macro-assembler-irregexp.h
+++ b/deps/v8/src/regexp-macro-assembler-irregexp.h
@@ -31,6 +31,7 @@
 namespace v8 {
 namespace internal {
 
+#ifndef V8_NATIVE_REGEXP
 
 class RegExpMacroAssemblerIrregexp: public RegExpMacroAssembler {
  public:
@@ -133,6 +134,8 @@ class RegExpMacroAssemblerIrregexp: public RegExpMacroAssembler {
   DISALLOW_IMPLICIT_CONSTRUCTORS(RegExpMacroAssemblerIrregexp);
 };
 
+#endif  // !V8_NATIVE_REGEXP
+
 } }  // namespace v8::internal
 
 #endif  // V8_REGEXP_MACRO_ASSEMBLER_IRREGEXP_H_
diff --git a/deps/v8/src/regexp-macro-assembler-tracer.h b/deps/v8/src/regexp-macro-assembler-tracer.h
index 28434d7ca..28ca5f340 100644
--- a/deps/v8/src/regexp-macro-assembler-tracer.h
+++ b/deps/v8/src/regexp-macro-assembler-tracer.h
@@ -37,7 +37,7 @@ class RegExpMacroAssemblerTracer: public RegExpMacroAssembler {
   explicit RegExpMacroAssemblerTracer(RegExpMacroAssembler* assembler);
   virtual ~RegExpMacroAssemblerTracer();
   virtual int stack_limit_slack() { return assembler_->stack_limit_slack(); }
-
+  virtual bool CanReadUnaligned() { return assembler_->CanReadUnaligned(); }
   virtual void AdvanceCurrentPosition(int by);  // Signed cp change.
   virtual void AdvanceRegister(int reg, int by);  // r[reg] += by.
   virtual void Backtrack();
diff --git a/deps/v8/src/regexp-macro-assembler.cc b/deps/v8/src/regexp-macro-assembler.cc
index 7f830fe48..0d00ceec3 100644
--- a/deps/v8/src/regexp-macro-assembler.cc
+++ b/deps/v8/src/regexp-macro-assembler.cc
@@ -30,6 +30,13 @@
 #include "assembler.h"
 #include "regexp-stack.h"
 #include "regexp-macro-assembler.h"
+#if V8_TARGET_ARCH_ARM
+#include "arm/simulator-arm.h"
+#elif V8_TARGET_ARCH_IA32
+#include "ia32/simulator-ia32.h"
+#elif V8_TARGET_ARCH_X64
+#include "x64/simulator-x64.h"
+#endif
 
 namespace v8 {
 namespace internal {
@@ -42,6 +49,15 @@ RegExpMacroAssembler::~RegExpMacroAssembler() {
 }
 
 
+bool RegExpMacroAssembler::CanReadUnaligned() {
+#ifdef V8_HOST_CAN_READ_UNALIGNED
+  return true;
+#else
+  return false;
+#endif
+}
+
+
 #ifdef V8_NATIVE_REGEXP  // Avoid unused code, e.g., on ARM.
 
 NativeRegExpMacroAssembler::NativeRegExpMacroAssembler() {
@@ -51,6 +67,15 @@ NativeRegExpMacroAssembler::NativeRegExpMacroAssembler() {
 NativeRegExpMacroAssembler::~NativeRegExpMacroAssembler() {
 }
 
+
+bool NativeRegExpMacroAssembler::CanReadUnaligned() {
+#ifdef V8_TARGET_CAN_READ_UNALIGNED
+  return true;
+#else
+  return false;
+#endif
+}
+
 const byte* NativeRegExpMacroAssembler::StringCharacterPosition(
     String* subject,
     int start_index) {
@@ -162,13 +187,14 @@ NativeRegExpMacroAssembler::Result NativeRegExpMacroAssembler::Execute(
   RegExpStack stack;
   Address stack_base = RegExpStack::stack_base();
 
-  int result = matcher_func(input,
-                            start_offset,
-                            input_start,
-                            input_end,
-                            output,
-                            at_start_val,
-                            stack_base);
+  int result = CALL_GENERATED_REGEXP_CODE(matcher_func,
+                                          input,
+                                          start_offset,
+                                          input_start,
+                                          input_end,
+                                          output,
+                                          at_start_val,
+                                          stack_base);
   ASSERT(result <= SUCCESS);
   ASSERT(result >= RETRY);
 
@@ -213,5 +239,22 @@ int NativeRegExpMacroAssembler::CaseInsensitiveCompareUC16(
   return 1;
 }
 
+
+Address NativeRegExpMacroAssembler::GrowStack(Address stack_pointer,
+                                              Address* stack_base) {
+  size_t size = RegExpStack::stack_capacity();
+  Address old_stack_base = RegExpStack::stack_base();
+  ASSERT(old_stack_base == *stack_base);
+  ASSERT(stack_pointer <= old_stack_base);
+  ASSERT(static_cast<size_t>(old_stack_base - stack_pointer) <= size);
+  Address new_stack_base = RegExpStack::EnsureCapacity(size * 2);
+  if (new_stack_base == NULL) {
+    return NULL;
+  }
+  *stack_base = new_stack_base;
+  intptr_t stack_content_size = old_stack_base - stack_pointer;
+  return new_stack_base - stack_content_size;
+}
+
 #endif  // V8_NATIVE_REGEXP
 } }  // namespace v8::internal
diff --git a/deps/v8/src/regexp-macro-assembler.h b/deps/v8/src/regexp-macro-assembler.h
index e59082768..26aab2c72 100644
--- a/deps/v8/src/regexp-macro-assembler.h
+++ b/deps/v8/src/regexp-macro-assembler.h
@@ -61,6 +61,7 @@ class RegExpMacroAssembler {
   // kCheckStackLimit flag to push operations (instead of kNoStackLimitCheck)
   // at least once for every stack_limit() pushes that are executed.
   virtual int stack_limit_slack() = 0;
+  virtual bool CanReadUnaligned();
   virtual void AdvanceCurrentPosition(int by) = 0;  // Signed cp change.
   virtual void AdvanceRegister(int reg, int by) = 0;  // r[reg] += by.
   // Continues execution from the position pushed on the top of the backtrack
@@ -182,6 +183,7 @@ class NativeRegExpMacroAssembler: public RegExpMacroAssembler {
 
   NativeRegExpMacroAssembler();
   virtual ~NativeRegExpMacroAssembler();
+  virtual bool CanReadUnaligned();
 
   static Result Match(Handle<Code> regexp,
                       Handle<String> subject,
@@ -195,6 +197,13 @@ class NativeRegExpMacroAssembler: public RegExpMacroAssembler {
                                         Address byte_offset2,
                                         size_t byte_length);
 
+  // Called from RegExp if the backtrack stack limit is hit.
+  // Tries to expand the stack. Returns the new stack-pointer if
+  // successful, and updates the stack_top address, or returns 0 if unable
+  // to grow the stack.
+  // This function must not trigger a garbage collection.
+  static Address GrowStack(Address stack_pointer, Address* stack_top);
+
   static const byte* StringCharacterPosition(String* subject, int start_index);
 
   static Result Execute(Code* code,
@@ -205,7 +214,25 @@ class NativeRegExpMacroAssembler: public RegExpMacroAssembler {
                         int* output,
                         bool at_start);
 };
+
+
+// Enter C code from generated RegExp code in a way that allows
+// the C code to fix the return address in case of a GC.
+// Currently only needed on ARM.
+class RegExpCEntryStub: public CodeStub {
+ public:
+  RegExpCEntryStub() {}
+  virtual ~RegExpCEntryStub() {}
+  void Generate(MacroAssembler* masm);
+
+ private:
+  Major MajorKey() { return RegExpCEntry; }
+  int MinorKey() { return 0; }
+  const char* GetName() { return "RegExpCEntryStub"; }
+};
+
 #endif  // V8_NATIVE_REGEXP
+
 } }  // namespace v8::internal
 
 #endif  // V8_REGEXP_MACRO_ASSEMBLER_H_
diff --git a/deps/v8/src/runtime.cc b/deps/v8/src/runtime.cc
index 845ac6308..f772d32d9 100644
--- a/deps/v8/src/runtime.cc
+++ b/deps/v8/src/runtime.cc
@@ -45,6 +45,7 @@
 #include "v8threads.h"
 #include "smart-pointer.h"
 #include "parser.h"
+#include "stub-cache.h"
 
 namespace v8 {
 namespace internal {
@@ -1235,6 +1236,9 @@ static Object* Runtime_SetCode(Arguments args) {
     // Array, and Object, and some web code
     // doesn't like seeing source code for constructors.
     target->shared()->set_script(Heap::undefined_value());
+    // Clear the optimization hints related to the compiled code as these are no
+    // longer valid when the code is overwritten.
+    target->shared()->ClearThisPropertyAssignmentsInfo();
     context = Handle<Context>(fun->context());
 
     // Make sure we get a fresh copy of the literal vector to avoid
@@ -4054,7 +4058,7 @@ static Object* Runtime_Math_acos(Arguments args) {
   ASSERT(args.length() == 1);
 
   CONVERT_DOUBLE_CHECKED(x, args[0]);
-  return Heap::AllocateHeapNumber(acos(x));
+  return TranscendentalCache::Get(TranscendentalCache::ACOS, x);
 }
 
 
@@ -4063,7 +4067,7 @@ static Object* Runtime_Math_asin(Arguments args) {
   ASSERT(args.length() == 1);
 
   CONVERT_DOUBLE_CHECKED(x, args[0]);
-  return Heap::AllocateHeapNumber(asin(x));
+  return TranscendentalCache::Get(TranscendentalCache::ASIN, x);
 }
 
 
@@ -4072,7 +4076,7 @@ static Object* Runtime_Math_atan(Arguments args) {
   ASSERT(args.length() == 1);
 
   CONVERT_DOUBLE_CHECKED(x, args[0]);
-  return Heap::AllocateHeapNumber(atan(x));
+  return TranscendentalCache::Get(TranscendentalCache::ATAN, x);
 }
 
 
@@ -4113,7 +4117,7 @@ static Object* Runtime_Math_cos(Arguments args) {
   ASSERT(args.length() == 1);
 
   CONVERT_DOUBLE_CHECKED(x, args[0]);
-  return Heap::AllocateHeapNumber(cos(x));
+  return TranscendentalCache::Get(TranscendentalCache::COS, x);
 }
 
 
@@ -4122,7 +4126,7 @@ static Object* Runtime_Math_exp(Arguments args) {
   ASSERT(args.length() == 1);
 
   CONVERT_DOUBLE_CHECKED(x, args[0]);
-  return Heap::AllocateHeapNumber(exp(x));
+  return TranscendentalCache::Get(TranscendentalCache::EXP, x);
 }
 
 
@@ -4140,7 +4144,7 @@ static Object* Runtime_Math_log(Arguments args) {
   ASSERT(args.length() == 1);
 
   CONVERT_DOUBLE_CHECKED(x, args[0]);
-  return Heap::AllocateHeapNumber(log(x));
+  return TranscendentalCache::Get(TranscendentalCache::LOG, x);
 }
 
 
@@ -4228,7 +4232,7 @@ static Object* Runtime_Math_sin(Arguments args) {
   ASSERT(args.length() == 1);
 
   CONVERT_DOUBLE_CHECKED(x, args[0]);
-  return Heap::AllocateHeapNumber(sin(x));
+  return TranscendentalCache::Get(TranscendentalCache::SIN, x);
 }
 
 
@@ -4246,7 +4250,7 @@ static Object* Runtime_Math_tan(Arguments args) {
   ASSERT(args.length() == 1);
 
   CONVERT_DOUBLE_CHECKED(x, args[0]);
-  return Heap::AllocateHeapNumber(tan(x));
+  return TranscendentalCache::Get(TranscendentalCache::TAN, x);
 }
 
 
@@ -4326,11 +4330,21 @@ static Object* Runtime_NewClosure(Arguments args) {
 }
 
 
-static Handle<Code> ComputeConstructStub(Handle<Map> map) {
+static Code* ComputeConstructStub(Handle<SharedFunctionInfo> shared) {
   // TODO(385): Change this to create a construct stub specialized for
   // the given map to make allocation of simple objects - and maybe
   // arrays - much faster.
-  return Handle<Code>(Builtins::builtin(Builtins::JSConstructStubGeneric));
+  if (FLAG_inline_new
+      && shared->has_only_simple_this_property_assignments()) {
+    ConstructStubCompiler compiler;
+    Object* code = compiler.CompileConstructStub(*shared);
+    if (code->IsFailure()) {
+      return Builtins::builtin(Builtins::JSConstructStubGeneric);
+    }
+    return Code::cast(code);
+  }
+
+  return Builtins::builtin(Builtins::JSConstructStubGeneric);
 }
 
 
@@ -4373,15 +4387,25 @@ static Object* Runtime_NewObject(Arguments args) {
     }
   }
 
+  // The function should be compiled for the optimization hints to be available.
+  if (!function->shared()->is_compiled()) {
+    CompileLazyShared(Handle<SharedFunctionInfo>(function->shared()),
+                                                 CLEAR_EXCEPTION,
+                                                 0);
+  }
+
   bool first_allocation = !function->has_initial_map();
   Handle<JSObject> result = Factory::NewJSObject(function);
   if (first_allocation) {
     Handle<Map> map = Handle<Map>(function->initial_map());
-    Handle<Code> stub = ComputeConstructStub(map);
+    Handle<Code> stub = Handle<Code>(
+        ComputeConstructStub(Handle<SharedFunctionInfo>(function->shared())));
     function->shared()->set_construct_stub(*stub);
   }
+
   Counters::constructed_objects.Increment();
   Counters::constructed_objects_runtime.Increment();
+
   return *result;
 }
 
@@ -7386,7 +7410,7 @@ static Object* Runtime_SystemBreak(Arguments args) {
 }
 
 
-static Object* Runtime_FunctionGetAssemblerCode(Arguments args) {
+static Object* Runtime_DebugDisassembleFunction(Arguments args) {
 #ifdef DEBUG
   HandleScope scope;
   ASSERT(args.length() == 1);
@@ -7401,6 +7425,21 @@ static Object* Runtime_FunctionGetAssemblerCode(Arguments args) {
 }
 
 
+static Object* Runtime_DebugDisassembleConstructor(Arguments args) {
+#ifdef DEBUG
+  HandleScope scope;
+  ASSERT(args.length() == 1);
+  // Get the function and make sure it is compiled.
+  CONVERT_ARG_CHECKED(JSFunction, func, 0);
+  if (!func->is_compiled() && !CompileLazy(func, KEEP_EXCEPTION)) {
+    return Failure::Exception();
+  }
+  func->shared()->construct_stub()->PrintLn();
+#endif  // DEBUG
+  return Heap::undefined_value();
+}
+
+
 static Object* Runtime_FunctionGetInferredName(Arguments args) {
   NoHandleAllocation ha;
   ASSERT(args.length() == 1);
diff --git a/deps/v8/src/runtime.h b/deps/v8/src/runtime.h
index d47ca18e7..1be677a11 100644
--- a/deps/v8/src/runtime.h
+++ b/deps/v8/src/runtime.h
@@ -303,7 +303,8 @@ namespace internal {
   F(DebugConstructedBy, 2) \
   F(DebugGetPrototype, 1) \
   F(SystemBreak, 0) \
-  F(FunctionGetAssemblerCode, 1) \
+  F(DebugDisassembleFunction, 1) \
+  F(DebugDisassembleConstructor, 1) \
   F(FunctionGetInferredName, 1)
 #else
 #define RUNTIME_FUNCTION_LIST_DEBUGGER_SUPPORT(F)
diff --git a/deps/v8/src/serialize.cc b/deps/v8/src/serialize.cc
index d2fd1e4fc..a16032ad3 100644
--- a/deps/v8/src/serialize.cc
+++ b/deps/v8/src/serialize.cc
@@ -734,6 +734,20 @@ void ExternalReferenceTable::PopulateTable() {
       UNCLASSIFIED,
       17,
       "compare_doubles");
+#ifdef V8_NATIVE_REGEXP
+  Add(ExternalReference::re_case_insensitive_compare_uc16().address(),
+      UNCLASSIFIED,
+      18,
+      "NativeRegExpMacroAssembler::CaseInsensitiveCompareUC16()");
+  Add(ExternalReference::re_check_stack_guard_state().address(),
+      UNCLASSIFIED,
+      19,
+      "RegExpMacroAssembler*::CheckStackGuardState()");
+  Add(ExternalReference::re_grow_stack().address(),
+      UNCLASSIFIED,
+      20,
+      "NativeRegExpMacroAssembler::GrowStack()");
+#endif
 }
 
 
@@ -1119,6 +1133,11 @@ void Serializer::PutHeader() {
 #else
   writer_->PutC('0');
 #endif
+#ifdef V8_NATIVE_REGEXP
+  writer_->PutC('N');
+#else  // Interpreted regexp
+  writer_->PutC('I');
+#endif
   // Write sizes of paged memory spaces. Allocate extra space for the old
   // and code spaces, because objects in new space will be promoted to them.
   writer_->PutC('S');
@@ -1238,7 +1257,7 @@ Address Serializer::PutObject(HeapObject* obj) {
 
   // Write out the object prologue: type, size, and simulated address of obj.
   writer_->PutC('[');
-  CHECK_EQ(0, size & kObjectAlignmentMask);
+  CHECK_EQ(0, static_cast<int>(size & kObjectAlignmentMask));
   writer_->PutInt(type);
   writer_->PutInt(size >> kObjectAlignmentBits);
   PutEncodedAddress(addr);  // encodes AllocationSpace
@@ -1475,6 +1494,11 @@ void Deserializer::GetHeader() {
   // synchronization tags.
   if (reader_.GetC() != '0') FATAL("Snapshot contains synchronization tags.");
 #endif
+#ifdef V8_NATIVE_REGEXP
+  reader_.ExpectC('N');
+#else  // Interpreted regexp.
+  reader_.ExpectC('I');
+#endif
   // Ensure sufficient capacity in paged memory spaces to avoid growth
   // during deserialization.
   reader_.ExpectC('S');
diff --git a/deps/v8/src/stub-cache.cc b/deps/v8/src/stub-cache.cc
index b25f5b4bb..2906c2292 100644
--- a/deps/v8/src/stub-cache.cc
+++ b/deps/v8/src/stub-cache.cc
@@ -1097,4 +1097,16 @@ Object* CallStubCompiler::GetCode(PropertyType type, String* name) {
 }
 
 
+Object* ConstructStubCompiler::GetCode() {
+  Code::Flags flags = Code::ComputeFlags(Code::STUB);
+  Object* result = GetCodeWithFlags(flags, "ConstructStub");
+  if (!result->IsFailure()) {
+    Code* code = Code::cast(result);
+    USE(code);
+    LOG(CodeCreateEvent(Logger::STUB_TAG, code, "ConstructStub"));
+  }
+  return result;
+}
+
+
 } }  // namespace v8::internal
diff --git a/deps/v8/src/stub-cache.h b/deps/v8/src/stub-cache.h
index 3b3caad56..e26892026 100644
--- a/deps/v8/src/stub-cache.h
+++ b/deps/v8/src/stub-cache.h
@@ -561,6 +561,17 @@ class CallStubCompiler: public StubCompiler {
 };
 
 
+class ConstructStubCompiler: public StubCompiler {
+ public:
+  explicit ConstructStubCompiler() {}
+
+  Object* CompileConstructStub(SharedFunctionInfo* shared);
+
+ private:
+  Object* GetCode();
+};
+
+
 } }  // namespace v8::internal
 
 #endif  // V8_STUB_CACHE_H_
diff --git a/deps/v8/src/top.cc b/deps/v8/src/top.cc
index 550703aa1..5c22bcf3c 100644
--- a/deps/v8/src/top.cc
+++ b/deps/v8/src/top.cc
@@ -855,23 +855,18 @@ void Top::TraceException(bool flag) {
 }
 
 
-bool Top::OptionalRescheduleException(bool is_bottom_call,
-                                      bool force_clear_catchable) {
+bool Top::OptionalRescheduleException(bool is_bottom_call) {
   // Allways reschedule out of memory exceptions.
   if (!is_out_of_memory()) {
     bool is_termination_exception =
         pending_exception() == Heap::termination_exception();
 
-    // Do not reschedule the exception if this is the bottom call or
-    // if we are asked to clear catchable exceptions.  Termination
-    // exceptions are not catchable and are only cleared if this is
-    // the bottom call.
-    bool clear_exception = is_bottom_call ||
-        (force_clear_catchable && !is_termination_exception);
+    // Do not reschedule the exception if this is the bottom call.
+    bool clear_exception = is_bottom_call;
 
     if (is_termination_exception) {
-      thread_local_.external_caught_exception_ = false;
       if (is_bottom_call) {
+        thread_local_.external_caught_exception_ = false;
         clear_pending_exception();
         return false;
       }
diff --git a/deps/v8/src/top.h b/deps/v8/src/top.h
index d4d73c21f..5b3d6a075 100644
--- a/deps/v8/src/top.h
+++ b/deps/v8/src/top.h
@@ -157,8 +157,8 @@ class Top {
   // exceptions.  If an exception was thrown and not handled by an external
   // handler the exception is scheduled to be rethrown when we return to running
   // JavaScript code.  If an exception is scheduled true is returned.
-  static bool OptionalRescheduleException(bool is_bottom_call,
-                                          bool force_clear_catchable);
+  static bool OptionalRescheduleException(bool is_bottom_call);
+
 
   static bool* external_caught_exception_address() {
     return &thread_local_.external_caught_exception_;
diff --git a/deps/v8/src/v8-counters.h b/deps/v8/src/v8-counters.h
index 43cd5e3d6..0b941f672 100644
--- a/deps/v8/src/v8-counters.h
+++ b/deps/v8/src/v8-counters.h
@@ -141,6 +141,7 @@ namespace internal {
   SC(call_global_inline_miss, V8.CallGlobalInlineMiss)              \
   SC(constructed_objects, V8.ConstructedObjects)                    \
   SC(constructed_objects_runtime, V8.ConstructedObjectsRuntime)     \
+  SC(constructed_objects_stub, V8.ConstructedObjectsStub)           \
   SC(for_in, V8.ForIn)                                              \
   SC(enum_cache_hits, V8.EnumCacheHits)                             \
   SC(enum_cache_misses, V8.EnumCacheMisses)                         \
diff --git a/deps/v8/src/v8.cc b/deps/v8/src/v8.cc
index bbcc9d1f1..a20415875 100644
--- a/deps/v8/src/v8.cc
+++ b/deps/v8/src/v8.cc
@@ -98,6 +98,10 @@ bool V8::Initialize(Deserializer *des) {
     StubCache::Clear();
   }
 
+  // Deserializing may put strange things in the root array's copy of the
+  // stack guard.
+  Heap::SetStackLimit(StackGuard::jslimit());
+
   // Setup the CPU support. Must be done after heap setup and after
   // any deserialization because we have to have the initial heap
   // objects in place for creating the code object used for probing.
diff --git a/deps/v8/src/version.cc b/deps/v8/src/version.cc
index 65fd116bf..39d18fd4d 100644
--- a/deps/v8/src/version.cc
+++ b/deps/v8/src/version.cc
@@ -34,7 +34,7 @@
 // cannot be changed without changing the SCons build script.
 #define MAJOR_VERSION     1
 #define MINOR_VERSION     3
-#define BUILD_NUMBER      7
+#define BUILD_NUMBER      9
 #define PATCH_LEVEL       0
 #define CANDIDATE_VERSION false
 
diff --git a/deps/v8/src/x64/assembler-x64.cc b/deps/v8/src/x64/assembler-x64.cc
index a02557e96..6304324da 100644
--- a/deps/v8/src/x64/assembler-x64.cc
+++ b/deps/v8/src/x64/assembler-x64.cc
@@ -120,13 +120,23 @@ void CpuFeatures::Probe()  {
   supported_ = kDefaultCpuFeatures | (1 << CPUID);
   { Scope fscope(CPUID);
     __ cpuid();
+    // Move the result from ecx:edx to rdi.
+    __ movl(rdi, rdx);  // Zero-extended to 64 bits.
+    __ shl(rcx, Immediate(32));
+    __ or_(rdi, rcx);
+
+    // Get the sahf supported flag, from CPUID(0x80000001)
+    __ movq(rax, 0x80000001, RelocInfo::NONE);
+    __ cpuid();
   }
   supported_ = kDefaultCpuFeatures;
 
-  // Move the result from ecx:edx to rax and make sure to mark the
-  // CPUID feature as supported.
-  __ movl(rax, rdx);  // Zero-extended to 64 bits.
-  __ shl(rcx, Immediate(32));
+  // Put the CPU flags in rax.
+  // rax = (rcx & 1) | (rdi & ~1) | (1 << CPUID).
+  __ movl(rax, Immediate(1));
+  __ and_(rcx, rax);  // Bit 0 is set if SAHF instruction supported.
+  __ not_(rax);
+  __ and_(rax, rdi);
   __ or_(rax, rcx);
   __ or_(rax, Immediate(1 << CPUID));
 
diff --git a/deps/v8/src/x64/assembler-x64.h b/deps/v8/src/x64/assembler-x64.h
index 9d602b9ef..4d341c672 100644
--- a/deps/v8/src/x64/assembler-x64.h
+++ b/deps/v8/src/x64/assembler-x64.h
@@ -361,7 +361,12 @@ class CpuFeatures : public AllStatic {
   // Feature flags bit positions. They are mostly based on the CPUID spec.
   // (We assign CPUID itself to one of the currently reserved bits --
   // feel free to change this if needed.)
-  enum Feature { SSE3 = 32, SSE2 = 26, CMOV = 15, RDTSC = 4, CPUID = 10 };
+  enum Feature { SSE3 = 32,
+                 SSE2 = 26,
+                 CMOV = 15,
+                 RDTSC = 4,
+                 CPUID = 10,
+                 SAHF = 0};
   // Detect features of the target CPU. Set safe defaults if the serializer
   // is enabled (snapshots must be portable).
   static void Probe();
diff --git a/deps/v8/src/x64/builtins-x64.cc b/deps/v8/src/x64/builtins-x64.cc
index 6988d7208..44d8b46c0 100644
--- a/deps/v8/src/x64/builtins-x64.cc
+++ b/deps/v8/src/x64/builtins-x64.cc
@@ -53,7 +53,7 @@ static void EnterArgumentsAdaptorFrame(MacroAssembler* masm) {
   __ movq(rbp, rsp);
 
   // Store the arguments adaptor context sentinel.
-  __ push(Immediate(ArgumentsAdaptorFrame::SENTINEL));
+  __ push(Immediate(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR)));
 
   // Push the function on the stack.
   __ push(rdi);
@@ -139,9 +139,7 @@ void Builtins::Generate_ArgumentsAdaptorTrampoline(MacroAssembler* masm) {
 
     // Fill remaining expected arguments with undefined values.
     Label fill;
-    __ movq(kScratchRegister,
-            Factory::undefined_value(),
-            RelocInfo::EMBEDDED_OBJECT);
+    __ LoadRoot(kScratchRegister, Heap::kUndefinedValueRootIndex);
     __ bind(&fill);
     __ incq(rcx);
     __ push(kScratchRegister);
@@ -218,9 +216,9 @@ void Builtins::Generate_FunctionCall(MacroAssembler* masm) {
     __ testl(rbx, Immediate(kSmiTagMask));
     __ j(zero, &call_to_object);
 
-    __ Cmp(rbx, Factory::null_value());
+    __ CompareRoot(rbx, Heap::kNullValueRootIndex);
     __ j(equal, &use_global_receiver);
-    __ Cmp(rbx, Factory::undefined_value());
+    __ CompareRoot(rbx, Heap::kUndefinedValueRootIndex);
     __ j(equal, &use_global_receiver);
 
     __ CmpObjectType(rbx, FIRST_JS_OBJECT_TYPE, rcx);
@@ -386,9 +384,9 @@ void Builtins::Generate_FunctionApply(MacroAssembler* masm) {
   __ movq(rbx, Operand(rbp, kReceiverOffset));
   __ testl(rbx, Immediate(kSmiTagMask));
   __ j(zero, &call_to_object);
-  __ Cmp(rbx, Factory::null_value());
+  __ CompareRoot(rbx, Heap::kNullValueRootIndex);
   __ j(equal, &use_global_receiver);
-  __ Cmp(rbx, Factory::undefined_value());
+  __ CompareRoot(rbx, Heap::kUndefinedValueRootIndex);
   __ j(equal, &use_global_receiver);
 
   // If given receiver is already a JavaScript object then there's no
@@ -542,22 +540,13 @@ void Builtins::Generate_JSConstructStubGeneric(MacroAssembler* masm) {
     // problem here, because it is always greater than the maximum
     // instance size that can be represented in a byte.
     ASSERT(Heap::MaxObjectSizeInPagedSpace() >= (1 << kBitsPerByte));
-    ExternalReference new_space_allocation_top =
-        ExternalReference::new_space_allocation_top_address();
-    __ movq(kScratchRegister, new_space_allocation_top);
-    __ movq(rbx, Operand(kScratchRegister, 0));
-    __ addq(rdi, rbx);  // Calculate new top
-    ExternalReference new_space_allocation_limit =
-        ExternalReference::new_space_allocation_limit_address();
-    __ movq(kScratchRegister, new_space_allocation_limit);
-    __ cmpq(rdi, Operand(kScratchRegister, 0));
-    __ j(above_equal, &rt_call);
+    __ AllocateObjectInNewSpace(rdi, rbx, rdi, no_reg, &rt_call, false);
     // Allocated the JSObject, now initialize the fields.
     // rax: initial map
     // rbx: JSObject (not HeapObject tagged - the actual address).
     // rdi: start of next object
     __ movq(Operand(rbx, JSObject::kMapOffset), rax);
-    __ Move(rcx, Factory::empty_fixed_array());
+    __ LoadRoot(rcx, Heap::kEmptyFixedArrayRootIndex);
     __ movq(Operand(rbx, JSObject::kPropertiesOffset), rcx);
     __ movq(Operand(rbx, JSObject::kElementsOffset), rcx);
     // Set extra fields in the newly allocated object.
@@ -565,7 +554,7 @@ void Builtins::Generate_JSConstructStubGeneric(MacroAssembler* masm) {
     // rbx: JSObject
     // rdi: start of next object
     { Label loop, entry;
-      __ Move(rdx, Factory::undefined_value());
+      __ LoadRoot(rdx, Heap::kUndefinedValueRootIndex);
       __ lea(rcx, Operand(rbx, JSObject::kHeaderSize));
       __ jmp(&entry);
       __ bind(&loop);
@@ -576,16 +565,14 @@ void Builtins::Generate_JSConstructStubGeneric(MacroAssembler* masm) {
       __ j(less, &loop);
     }
 
-    // Mostly done with the JSObject. Add the heap tag and store the new top, so
-    // that we can continue and jump into the continuation code at any time from
-    // now on. Any failures need to undo the setting of the new top, so that the
-    // heap is in a consistent state and verifiable.
+    // Add the object tag to make the JSObject real, so that we can continue and
+    // jump into the continuation code at any time from now on. Any failures
+    // need to undo the allocation, so that the heap is in a consistent state
+    // and verifiable.
     // rax: initial map
     // rbx: JSObject
     // rdi: start of next object
     __ or_(rbx, Immediate(kHeapObjectTag));
-    __ movq(kScratchRegister, new_space_allocation_top);
-    __ movq(Operand(kScratchRegister, 0), rdi);
 
     // Check if a non-empty properties array is needed.
     // Allocate and initialize a FixedArray if it is.
@@ -610,18 +597,21 @@ void Builtins::Generate_JSConstructStubGeneric(MacroAssembler* masm) {
     // rdx: number of elements in properties array
     ASSERT(Heap::MaxObjectSizeInPagedSpace() >
            (FixedArray::kHeaderSize + 255*kPointerSize));
-    __ lea(rax, Operand(rdi, rdx, times_pointer_size, FixedArray::kHeaderSize));
-    __ movq(kScratchRegister, new_space_allocation_limit);
-    __ cmpq(rax, Operand(kScratchRegister, 0));
-    __ j(above_equal, &undo_allocation);
-    __ store_rax(new_space_allocation_top);
+    __ AllocateObjectInNewSpace(FixedArray::kHeaderSize,
+                                times_pointer_size,
+                                rdx,
+                                rdi,
+                                rax,
+                                no_reg,
+                                &undo_allocation,
+                                true);
 
     // Initialize the FixedArray.
     // rbx: JSObject
     // rdi: FixedArray
     // rdx: number of elements
     // rax: start of next object
-    __ Move(rcx, Factory::fixed_array_map());
+    __ LoadRoot(rcx, Heap::kFixedArrayMapRootIndex);
     __ movq(Operand(rdi, JSObject::kMapOffset), rcx);  // setup the map
     __ movl(Operand(rdi, FixedArray::kLengthOffset), rdx);  // and length
 
@@ -631,7 +621,7 @@ void Builtins::Generate_JSConstructStubGeneric(MacroAssembler* masm) {
     // rax: start of next object
     // rdx: number of elements
     { Label loop, entry;
-      __ Move(rdx, Factory::undefined_value());
+      __ LoadRoot(rdx, Heap::kUndefinedValueRootIndex);
       __ lea(rcx, Operand(rdi, FixedArray::kHeaderSize));
       __ jmp(&entry);
       __ bind(&loop);
@@ -659,9 +649,7 @@ void Builtins::Generate_JSConstructStubGeneric(MacroAssembler* masm) {
     // allocated objects unused properties.
     // rbx: JSObject (previous new top)
     __ bind(&undo_allocation);
-    __ xor_(rbx, Immediate(kHeapObjectTag));  // clear the heap tag
-    __ movq(kScratchRegister, new_space_allocation_top);
-    __ movq(Operand(kScratchRegister, 0), rbx);
+    __ UndoAllocationInNewSpace(rbx);
   }
 
   // Allocate the new receiver object using the runtime call.
@@ -756,7 +744,7 @@ static void Generate_JSEntryTrampolineHelper(MacroAssembler* masm,
   // an internal frame and the pushed function and receiver, and
   // register rax and rbx holds the argument count and argument array,
   // while rdi holds the function pointer and rsi the context.
-#ifdef __MSVC__
+#ifdef _WIN64
   // MSVC parameters in:
   // rcx : entry (ignored)
   // rdx : function
@@ -766,7 +754,6 @@ static void Generate_JSEntryTrampolineHelper(MacroAssembler* masm,
 
   // Clear the context before we push it when entering the JS frame.
   __ xor_(rsi, rsi);
-  // Enter an internal frame.
   __ EnterInternalFrame();
 
   // Load the function context into rsi.
@@ -783,7 +770,7 @@ static void Generate_JSEntryTrampolineHelper(MacroAssembler* masm,
   __ movq(rbx, Operand(kScratchRegister, EntryFrameConstants::kArgvOffset));
   // Load the function pointer into rdi.
   __ movq(rdi, rdx);
-#else  // !defined(__MSVC__)
+#else  // !defined(_WIN64)
   // GCC parameters in:
   // rdi : entry (ignored)
   // rsi : function
@@ -807,7 +794,12 @@ static void Generate_JSEntryTrampolineHelper(MacroAssembler* masm,
   // Load the number of arguments and setup pointer to the arguments.
   __ movq(rax, rcx);
   __ movq(rbx, r8);
-#endif  // __MSVC__
+#endif  // _WIN64
+
+  // Set up the roots register.
+  ExternalReference roots_address = ExternalReference::roots_address();
+  __ movq(r13, roots_address);
+
   // Current stack contents:
   // [rsp + 2 * kPointerSize ... ]: Internal frame
   // [rsp + kPointerSize]         : function
diff --git a/deps/v8/src/x64/cfg-x64.cc b/deps/v8/src/x64/cfg-x64.cc
index 34ddbbf02..0b71d8ec7 100644
--- a/deps/v8/src/x64/cfg-x64.cc
+++ b/deps/v8/src/x64/cfg-x64.cc
@@ -71,8 +71,7 @@ void EntryNode::Compile(MacroAssembler* masm) {
     __ push(rdi);
     int count = CfgGlobals::current()->fun()->scope()->num_stack_slots();
     if (count > 0) {
-      __ movq(kScratchRegister, Factory::undefined_value(),
-              RelocInfo::EMBEDDED_OBJECT);
+      __ LoadRoot(kScratchRegister, Heap::kUndefinedValueRootIndex);
       for (int i = 0; i < count; i++) {
         __ push(kScratchRegister);
       }
diff --git a/deps/v8/src/x64/codegen-x64.cc b/deps/v8/src/x64/codegen-x64.cc
index d61b37b2c..8d313c951 100644
--- a/deps/v8/src/x64/codegen-x64.cc
+++ b/deps/v8/src/x64/codegen-x64.cc
@@ -537,7 +537,6 @@ bool CodeGenerator::HasValidEntryRegisters() {
       && (allocator()->count(r11) == (frame()->is_used(r11) ? 1 : 0))
       && (allocator()->count(r14) == (frame()->is_used(r14) ? 1 : 0))
       && (allocator()->count(r15) == (frame()->is_used(r15) ? 1 : 0))
-      && (allocator()->count(r13) == (frame()->is_used(r13) ? 1 : 0))
       && (allocator()->count(r12) == (frame()->is_used(r12) ? 1 : 0));
 }
 #endif
@@ -649,6 +648,196 @@ void DeferredReferenceSetKeyedValue::Generate() {
 }
 
 
+class CallFunctionStub: public CodeStub {
+ public:
+  CallFunctionStub(int argc, InLoopFlag in_loop)
+      : argc_(argc), in_loop_(in_loop) { }
+
+  void Generate(MacroAssembler* masm);
+
+ private:
+  int argc_;
+  InLoopFlag in_loop_;
+
+#ifdef DEBUG
+  void Print() { PrintF("CallFunctionStub (args %d)\n", argc_); }
+#endif
+
+  Major MajorKey() { return CallFunction; }
+  int MinorKey() { return argc_; }
+  InLoopFlag InLoop() { return in_loop_; }
+};
+
+
+void CodeGenerator::CallApplyLazy(Property* apply,
+                                  Expression* receiver,
+                                  VariableProxy* arguments,
+                                  int position) {
+  ASSERT(ArgumentsMode() == LAZY_ARGUMENTS_ALLOCATION);
+  ASSERT(arguments->IsArguments());
+
+  JumpTarget slow, done;
+
+  // Load the apply function onto the stack. This will usually
+  // give us a megamorphic load site. Not super, but it works.
+  Reference ref(this, apply);
+  ref.GetValue(NOT_INSIDE_TYPEOF);
+  ASSERT(ref.type() == Reference::NAMED);
+
+  // Load the receiver and the existing arguments object onto the
+  // expression stack. Avoid allocating the arguments object here.
+  Load(receiver);
+  LoadFromSlot(scope_->arguments()->var()->slot(), NOT_INSIDE_TYPEOF);
+
+  // Emit the source position information after having loaded the
+  // receiver and the arguments.
+  CodeForSourcePosition(position);
+
+  // Check if the arguments object has been lazily allocated
+  // already. If so, just use that instead of copying the arguments
+  // from the stack. This also deals with cases where a local variable
+  // named 'arguments' has been introduced.
+  frame_->Dup();
+  Result probe = frame_->Pop();
+  bool try_lazy = true;
+  if (probe.is_constant()) {
+    try_lazy = probe.handle()->IsTheHole();
+  } else {
+    __ Cmp(probe.reg(), Factory::the_hole_value());
+    probe.Unuse();
+    slow.Branch(not_equal);
+  }
+
+  if (try_lazy) {
+    JumpTarget build_args;
+
+    // Get rid of the arguments object probe.
+    frame_->Drop();
+
+    // Before messing with the execution stack, we sync all
+    // elements. This is bound to happen anyway because we're
+    // about to call a function.
+    frame_->SyncRange(0, frame_->element_count() - 1);
+
+    // Check that the receiver really is a JavaScript object.
+    { frame_->PushElementAt(0);
+      Result receiver = frame_->Pop();
+      receiver.ToRegister();
+      __ testl(receiver.reg(), Immediate(kSmiTagMask));
+      build_args.Branch(zero);
+      // We allow all JSObjects including JSFunctions.  As long as
+      // JS_FUNCTION_TYPE is the last instance type and it is right
+      // after LAST_JS_OBJECT_TYPE, we do not have to check the upper
+      // bound.
+      ASSERT(LAST_TYPE == JS_FUNCTION_TYPE);
+      ASSERT(JS_FUNCTION_TYPE == LAST_JS_OBJECT_TYPE + 1);
+      __ CmpObjectType(receiver.reg(), FIRST_JS_OBJECT_TYPE, kScratchRegister);
+      build_args.Branch(below);
+    }
+
+    // Verify that we're invoking Function.prototype.apply.
+    { frame_->PushElementAt(1);
+      Result apply = frame_->Pop();
+      apply.ToRegister();
+      __ testl(apply.reg(), Immediate(kSmiTagMask));
+      build_args.Branch(zero);
+      Result tmp = allocator_->Allocate();
+      __ CmpObjectType(apply.reg(), JS_FUNCTION_TYPE, tmp.reg());
+      build_args.Branch(not_equal);
+      __ movq(tmp.reg(),
+              FieldOperand(apply.reg(), JSFunction::kSharedFunctionInfoOffset));
+      Handle<Code> apply_code(Builtins::builtin(Builtins::FunctionApply));
+      __ Cmp(FieldOperand(tmp.reg(), SharedFunctionInfo::kCodeOffset),
+             apply_code);
+      build_args.Branch(not_equal);
+    }
+
+    // Get the function receiver from the stack. Check that it
+    // really is a function.
+    __ movq(rdi, Operand(rsp, 2 * kPointerSize));
+    __ testl(rdi, Immediate(kSmiTagMask));
+    build_args.Branch(zero);
+    __ CmpObjectType(rdi, JS_FUNCTION_TYPE, rcx);
+    build_args.Branch(not_equal);
+
+    // Copy the arguments to this function possibly from the
+    // adaptor frame below it.
+    Label invoke, adapted;
+    __ movq(rdx, Operand(rbp, StandardFrameConstants::kCallerFPOffset));
+    __ movq(rcx, Operand(rdx, StandardFrameConstants::kContextOffset));
+    __ cmpq(rcx, Immediate(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR)));
+    __ j(equal, &adapted);
+
+    // No arguments adaptor frame. Copy fixed number of arguments.
+    __ movq(rax, Immediate(scope_->num_parameters()));
+    for (int i = 0; i < scope_->num_parameters(); i++) {
+      __ push(frame_->ParameterAt(i));
+    }
+    __ jmp(&invoke);
+
+    // Arguments adaptor frame present. Copy arguments from there, but
+    // avoid copying too many arguments to avoid stack overflows.
+    __ bind(&adapted);
+    static const uint32_t kArgumentsLimit = 1 * KB;
+    __ movq(rax, Operand(rdx, ArgumentsAdaptorFrameConstants::kLengthOffset));
+    __ shrl(rax, Immediate(kSmiTagSize));
+    __ movq(rcx, rax);
+    __ cmpq(rax, Immediate(kArgumentsLimit));
+    build_args.Branch(above);
+
+    // Loop through the arguments pushing them onto the execution
+    // stack. We don't inform the virtual frame of the push, so we don't
+    // have to worry about getting rid of the elements from the virtual
+    // frame.
+    Label loop;
+    __ bind(&loop);
+    __ testl(rcx, rcx);
+    __ j(zero, &invoke);
+    __ push(Operand(rdx, rcx, times_pointer_size, 1 * kPointerSize));
+    __ decl(rcx);
+    __ jmp(&loop);
+
+    // Invoke the function. The virtual frame knows about the receiver
+    // so make sure to forget that explicitly.
+    __ bind(&invoke);
+    ParameterCount actual(rax);
+    __ InvokeFunction(rdi, actual, CALL_FUNCTION);
+    frame_->Forget(1);
+    Result result = allocator()->Allocate(rax);
+    frame_->SetElementAt(0, &result);
+    done.Jump();
+
+    // Slow-case: Allocate the arguments object since we know it isn't
+    // there, and fall-through to the slow-case where we call
+    // Function.prototype.apply.
+    build_args.Bind();
+    Result arguments_object = StoreArgumentsObject(false);
+    frame_->Push(&arguments_object);
+    slow.Bind();
+  }
+
+  // Flip the apply function and the function to call on the stack, so
+  // the function looks like the receiver of the apply call. This way,
+  // the generic Function.prototype.apply implementation can deal with
+  // the call like it usually does.
+  Result a2 = frame_->Pop();
+  Result a1 = frame_->Pop();
+  Result ap = frame_->Pop();
+  Result fn = frame_->Pop();
+  frame_->Push(&ap);
+  frame_->Push(&fn);
+  frame_->Push(&a1);
+  frame_->Push(&a2);
+  CallFunctionStub call_function(2, NOT_IN_LOOP);
+  Result res = frame_->CallStub(&call_function, 3);
+  frame_->Push(&res);
+
+  // All done. Restore context register after call.
+  if (try_lazy) done.Bind();
+  frame_->RestoreContextRegister();
+}
+
+
 class DeferredStackCheck: public DeferredCode {
  public:
   DeferredStackCheck() {
@@ -668,37 +857,13 @@ void DeferredStackCheck::Generate() {
 void CodeGenerator::CheckStack() {
   if (FLAG_check_stack) {
     DeferredStackCheck* deferred = new DeferredStackCheck;
-    ExternalReference stack_guard_limit =
-        ExternalReference::address_of_stack_guard_limit();
-    __ movq(kScratchRegister, stack_guard_limit);
-    __ cmpq(rsp, Operand(kScratchRegister, 0));
+    __ CompareRoot(rsp, Heap::kStackLimitRootIndex);
     deferred->Branch(below);
     deferred->BindExit();
   }
 }
 
 
-class CallFunctionStub: public CodeStub {
- public:
-  CallFunctionStub(int argc, InLoopFlag in_loop)
-      : argc_(argc), in_loop_(in_loop) { }
-
-  void Generate(MacroAssembler* masm);
-
- private:
-  int argc_;
-  InLoopFlag in_loop_;
-
-#ifdef DEBUG
-  void Print() { PrintF("CallFunctionStub (args %d)\n", argc_); }
-#endif
-
-  Major MajorKey() { return CallFunction; }
-  int MinorKey() { return argc_; }
-  InLoopFlag InLoop() { return in_loop_; }
-};
-
-
 void CodeGenerator::VisitAndSpill(Statement* statement) {
   // TODO(X64): No architecture specific code. Move to shared location.
   ASSERT(in_spilled_code());
@@ -772,9 +937,7 @@ void CodeGenerator::VisitDeclaration(Declaration* node) {
     // 'undefined') because we may have a (legal) redeclaration and we
     // must not destroy the current value.
     if (node->mode() == Variable::CONST) {
-      __ movq(kScratchRegister, Factory::the_hole_value(),
-              RelocInfo::EMBEDDED_OBJECT);
-      frame_->EmitPush(kScratchRegister);
+      frame_->EmitPush(Heap::kTheHoleValueRootIndex);
     } else if (node->fun() != NULL) {
       Load(node->fun());
     } else {
@@ -1480,9 +1643,9 @@ void CodeGenerator::VisitForInStatement(ForInStatement* node) {
   frame_->EmitPop(rax);
 
   // rax: value to be iterated over
-  __ Cmp(rax, Factory::undefined_value());
+  __ CompareRoot(rax, Heap::kUndefinedValueRootIndex);
   exit.Branch(equal);
-  __ Cmp(rax, Factory::null_value());
+  __ CompareRoot(rax, Heap::kNullValueRootIndex);
   exit.Branch(equal);
 
   // Stack layout in body:
@@ -1518,7 +1681,7 @@ void CodeGenerator::VisitForInStatement(ForInStatement* node) {
   // Runtime::kGetPropertyNamesFast)
   __ movq(rdx, rax);
   __ movq(rcx, FieldOperand(rdx, HeapObject::kMapOffset));
-  __ Cmp(rcx, Factory::meta_map());
+  __ CompareRoot(rcx, Heap::kMetaMapRootIndex);
   fixed_array.Branch(not_equal);
 
   // Get enum cache
@@ -1587,7 +1750,7 @@ void CodeGenerator::VisitForInStatement(ForInStatement* node) {
   __ movq(rbx, rax);
 
   // If the property has been removed while iterating, we just skip it.
-  __ Cmp(rbx, Factory::null_value());
+  __ CompareRoot(rbx, Heap::kNullValueRootIndex);
   node->continue_target()->Branch(equal);
 
   end_del_check.Bind();
@@ -1862,10 +2025,7 @@ void CodeGenerator::VisitTryFinally(TryFinally* node) {
 
     // Fake a top of stack value (unneeded when FALLING) and set the
     // state in ecx, then jump around the unlink blocks if any.
-    __ movq(kScratchRegister,
-            Factory::undefined_value(),
-            RelocInfo::EMBEDDED_OBJECT);
-    frame_->EmitPush(kScratchRegister);
+    frame_->EmitPush(Heap::kUndefinedValueRootIndex);
     __ movq(rcx, Immediate(Smi::FromInt(FALLING)));
     if (nof_unlinks > 0) {
       finally_block.Jump();
@@ -1910,10 +2070,7 @@ void CodeGenerator::VisitTryFinally(TryFinally* node) {
         frame_->EmitPush(rax);
       } else {
         // Fake TOS for targets that shadowed breaks and continues.
-        __ movq(kScratchRegister,
-                Factory::undefined_value(),
-                RelocInfo::EMBEDDED_OBJECT);
-        frame_->EmitPush(kScratchRegister);
+        frame_->EmitPush(Heap::kUndefinedValueRootIndex);
       }
       __ movq(rcx, Immediate(Smi::FromInt(JUMPING + i)));
       if (--nof_unlinks > 0) {
@@ -2155,7 +2312,7 @@ void CodeGenerator::VisitRegExpLiteral(RegExpLiteral* node) {
   // jump to the deferred code passing the literals array.
   DeferredRegExpLiteral* deferred =
       new DeferredRegExpLiteral(boilerplate.reg(), literals.reg(), node);
-  __ Cmp(boilerplate.reg(), Factory::undefined_value());
+  __ CompareRoot(boilerplate.reg(), Heap::kUndefinedValueRootIndex);
   deferred->Branch(equal);
   deferred->BindExit();
   literals.Unuse();
@@ -2226,7 +2383,7 @@ void CodeGenerator::VisitObjectLiteral(ObjectLiteral* node) {
   // If so, jump to the deferred code passing the literals array.
   DeferredObjectLiteral* deferred =
       new DeferredObjectLiteral(boilerplate.reg(), literals.reg(), node);
-  __ Cmp(boilerplate.reg(), Factory::undefined_value());
+  __ CompareRoot(boilerplate.reg(), Heap::kUndefinedValueRootIndex);
   deferred->Branch(equal);
   deferred->BindExit();
   literals.Unuse();
@@ -2359,7 +2516,7 @@ void CodeGenerator::VisitArrayLiteral(ArrayLiteral* node) {
   // If so, jump to the deferred code passing the literals array.
   DeferredArrayLiteral* deferred =
       new DeferredArrayLiteral(boilerplate.reg(), literals.reg(), node);
-  __ Cmp(boilerplate.reg(), Factory::undefined_value());
+  __ CompareRoot(boilerplate.reg(), Heap::kUndefinedValueRootIndex);
   deferred->Branch(equal);
   deferred->BindExit();
   literals.Unuse();
@@ -2612,27 +2769,40 @@ void CodeGenerator::VisitCall(Call* node) {
       // JavaScript example: 'object.foo(1, 2, 3)' or 'map["key"](1, 2, 3)'
       // ------------------------------------------------------------------
 
-      // TODO(X64): Consider optimizing Function.prototype.apply calls
-      // with arguments object. Requires lazy arguments allocation;
-      // see http://codereview.chromium.org/147075.
+      Handle<String> name = Handle<String>::cast(literal->handle());
 
-      // Push the name of the function and the receiver onto the stack.
-      frame_->Push(literal->handle());
-      Load(property->obj());
+      if (ArgumentsMode() == LAZY_ARGUMENTS_ALLOCATION &&
+          name->IsEqualTo(CStrVector("apply")) &&
+          args->length() == 2 &&
+          args->at(1)->AsVariableProxy() != NULL &&
+          args->at(1)->AsVariableProxy()->IsArguments()) {
+        // Use the optimized Function.prototype.apply that avoids
+        // allocating lazily allocated arguments objects.
+        CallApplyLazy(property,
+                      args->at(0),
+                      args->at(1)->AsVariableProxy(),
+                      node->position());
 
-      // Load the arguments.
-      int arg_count = args->length();
-      for (int i = 0; i < arg_count; i++) {
-        Load(args->at(i));
-      }
+      } else {
+        // Push the name of the function and the receiver onto the stack.
+        frame_->Push(name);
+        Load(property->obj());
+
+        // Load the arguments.
+        int arg_count = args->length();
+        for (int i = 0; i < arg_count; i++) {
+          Load(args->at(i));
+        }
 
-      // Call the IC initialization code.
-      CodeForSourcePosition(node->position());
-      Result result =
-          frame_->CallCallIC(RelocInfo::CODE_TARGET, arg_count, loop_nesting());
-      frame_->RestoreContextRegister();
-      // Replace the function on the stack with the result.
-      frame_->SetElementAt(0, &result);
+        // Call the IC initialization code.
+        CodeForSourcePosition(node->position());
+        Result result = frame_->CallCallIC(RelocInfo::CODE_TARGET,
+                                           arg_count,
+                                           loop_nesting());
+        frame_->RestoreContextRegister();
+        // Replace the function on the stack with the result.
+        frame_->SetElementAt(0, &result);
+      }
 
     } else {
       // -------------------------------------------
@@ -3304,7 +3474,7 @@ void CodeGenerator::VisitCompareOperation(CompareOperation* node) {
       destination()->true_target()->Branch(zero);
       frame_->Spill(answer.reg());
       __ movq(answer.reg(), FieldOperand(answer.reg(), HeapObject::kMapOffset));
-      __ Cmp(answer.reg(), Factory::heap_number_map());
+      __ CompareRoot(answer.reg(), Heap::kHeapNumberMapRootIndex);
       answer.Unuse();
       destination()->Split(equal);
 
@@ -3323,14 +3493,14 @@ void CodeGenerator::VisitCompareOperation(CompareOperation* node) {
       destination()->Split(below);  // Unsigned byte comparison needed.
 
     } else if (check->Equals(Heap::boolean_symbol())) {
-      __ Cmp(answer.reg(), Factory::true_value());
+      __ CompareRoot(answer.reg(), Heap::kTrueValueRootIndex);
       destination()->true_target()->Branch(equal);
-      __ Cmp(answer.reg(), Factory::false_value());
+      __ CompareRoot(answer.reg(), Heap::kFalseValueRootIndex);
       answer.Unuse();
       destination()->Split(equal);
 
     } else if (check->Equals(Heap::undefined_symbol())) {
-      __ Cmp(answer.reg(), Factory::undefined_value());
+      __ CompareRoot(answer.reg(), Heap::kUndefinedValueRootIndex);
       destination()->true_target()->Branch(equal);
 
       __ testl(answer.reg(), Immediate(kSmiTagMask));
@@ -3355,7 +3525,7 @@ void CodeGenerator::VisitCompareOperation(CompareOperation* node) {
     } else if (check->Equals(Heap::object_symbol())) {
       __ testl(answer.reg(), Immediate(kSmiTagMask));
       destination()->false_target()->Branch(zero);
-      __ Cmp(answer.reg(), Factory::null_value());
+      __ CompareRoot(answer.reg(), Heap::kNullValueRootIndex);
       destination()->true_target()->Branch(equal);
 
       // It can be an undetectable object.
@@ -3473,7 +3643,7 @@ void CodeGenerator::GenerateIsConstructCall(ZoneList<Expression*>* args) {
   // Skip the arguments adaptor frame if it exists.
   Label check_frame_marker;
   __ cmpq(Operand(fp.reg(), StandardFrameConstants::kContextOffset),
-          Immediate(ArgumentsAdaptorFrame::SENTINEL));
+          Immediate(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR)));
   __ j(not_equal, &check_frame_marker);
   __ movq(fp.reg(), Operand(fp.reg(), StandardFrameConstants::kCallerFPOffset));
 
@@ -3564,7 +3734,7 @@ void CodeGenerator::GenerateFastCharCodeAt(ZoneList<Expression*>* args) {
   // If the index is negative or non-smi trigger the slow case.
   ASSERT(kSmiTag == 0);
   __ testl(index.reg(),
-           Immediate(static_cast<int32_t>(kSmiTagMask | 0x80000000U)));
+           Immediate(static_cast<uint32_t>(kSmiTagMask | 0x80000000U)));
   __ j(not_zero, &slow_case);
   // Untag the index.
   __ sarl(index.reg(), Immediate(kSmiTagSize));
@@ -3649,7 +3819,7 @@ void CodeGenerator::GenerateFastCharCodeAt(ZoneList<Expression*>* args) {
   __ bind(&slow_case);
   // Move the undefined value into the result register, which will
   // trigger the slow case.
-  __ Move(temp.reg(), Factory::undefined_value());
+  __ LoadRoot(temp.reg(), Heap::kUndefinedValueRootIndex);
 
   __ bind(&end);
   frame_->Push(&temp);
@@ -4092,15 +4262,15 @@ void CodeGenerator::ToBoolean(ControlDestination* dest) {
   // Fast case checks.
 
   // 'false' => false.
-  __ Cmp(value.reg(), Factory::false_value());
+  __ CompareRoot(value.reg(), Heap::kFalseValueRootIndex);
   dest->false_target()->Branch(equal);
 
   // 'true' => true.
-  __ Cmp(value.reg(), Factory::true_value());
+  __ CompareRoot(value.reg(), Heap::kTrueValueRootIndex);
   dest->true_target()->Branch(equal);
 
   // 'undefined' => false.
-  __ Cmp(value.reg(), Factory::undefined_value());
+  __ CompareRoot(value.reg(), Heap::kUndefinedValueRootIndex);
   dest->false_target()->Branch(equal);
 
   // Smi => false iff zero.
@@ -4319,10 +4489,9 @@ void CodeGenerator::LoadFromSlot(Slot* slot, TypeofState typeof_state) {
                                                  value,
                                                  &slow));
         if (potential_slot->var()->mode() == Variable::CONST) {
-          __ Cmp(value.reg(), Factory::the_hole_value());
+          __ CompareRoot(value.reg(), Heap::kTheHoleValueRootIndex);
           done.Branch(not_equal, &value);
-          __ movq(value.reg(), Factory::undefined_value(),
-                  RelocInfo::EMBEDDED_OBJECT);
+          __ LoadRoot(value.reg(), Heap::kUndefinedValueRootIndex);
         }
         // There is always control flow to slow from
         // ContextSlotOperandCheckExtensions so we have to jump around
@@ -4360,9 +4529,9 @@ void CodeGenerator::LoadFromSlot(Slot* slot, TypeofState typeof_state) {
     Comment cmnt(masm_, "[ Load const");
     JumpTarget exit;
     __ movq(rcx, SlotOperand(slot, rcx));
-    __ Cmp(rcx, Factory::the_hole_value());
+    __ CompareRoot(rcx, Heap::kTheHoleValueRootIndex);
     exit.Branch(not_equal);
-    __ movq(rcx, Factory::undefined_value(), RelocInfo::EMBEDDED_OBJECT);
+    __ LoadRoot(rcx, Heap::kUndefinedValueRootIndex);
     exit.Bind();
     frame_->EmitPush(rcx);
 
@@ -4416,7 +4585,7 @@ void CodeGenerator::LoadFromSlotCheckForArguments(Slot* slot,
   // indicates that we haven't loaded the arguments object yet, we
   // need to do it now.
   JumpTarget exit;
-  __ Cmp(value.reg(), Factory::the_hole_value());
+  __ CompareRoot(value.reg(), Heap::kTheHoleValueRootIndex);
   frame_->Push(&value);
   exit.Branch(not_equal);
   Result arguments = StoreArgumentsObject(false);
@@ -4477,7 +4646,7 @@ void CodeGenerator::StoreToSlot(Slot* slot, InitState init_state) {
       VirtualFrame::SpilledScope spilled_scope;
       Comment cmnt(masm_, "[ Init const");
       __ movq(rcx, SlotOperand(slot, rcx));
-      __ Cmp(rcx, Factory::the_hole_value());
+      __ CompareRoot(rcx, Heap::kTheHoleValueRootIndex);
       exit.Branch(not_equal);
     }
 
@@ -4561,7 +4730,7 @@ Result CodeGenerator::LoadFromGlobalSlotCheckExtensions(
       __ movq(tmp.reg(), context);
     }
     // Load map for comparison into register, outside loop.
-    __ Move(kScratchRegister, Factory::global_context_map());
+    __ LoadRoot(kScratchRegister, Heap::kGlobalContextMapRootIndex);
     __ bind(&next);
     // Terminate at global context.
     __ cmpq(kScratchRegister, FieldOperand(tmp.reg(), HeapObject::kMapOffset));
@@ -4665,7 +4834,7 @@ Result CodeGenerator::StoreArgumentsObject(bool initial) {
         // been assigned a proper value.
         skip_arguments = !arguments.handle()->IsTheHole();
       } else {
-        __ Cmp(arguments.reg(), Factory::the_hole_value());
+        __ CompareRoot(arguments.reg(), Heap::kTheHoleValueRootIndex);
         arguments.Unuse();
         done.Branch(not_equal);
       }
@@ -4803,7 +4972,7 @@ void CodeGenerator::Comparison(Condition cc,
     right_side.Unuse();
     left_side.Unuse();
     operand.ToRegister();
-    __ Cmp(operand.reg(), Factory::null_value());
+    __ CompareRoot(operand.reg(), Heap::kNullValueRootIndex);
     if (strict) {
       operand.Unuse();
       dest->Split(equal);
@@ -4811,7 +4980,7 @@ void CodeGenerator::Comparison(Condition cc,
       // The 'null' value is only equal to 'undefined' if using non-strict
       // comparisons.
       dest->true_target()->Branch(equal);
-      __ Cmp(operand.reg(), Factory::undefined_value());
+      __ CompareRoot(operand.reg(), Heap::kUndefinedValueRootIndex);
       dest->true_target()->Branch(equal);
       __ testl(operand.reg(), Immediate(kSmiTagMask));
       dest->false_target()->Branch(equal);
@@ -5354,7 +5523,7 @@ void CodeGenerator::ConstantSmiBinaryOperation(Token::Value op,
                                                                 overwrite_mode);
         // Check for negative or non-Smi left hand side.
         __ testl(operand->reg(),
-                 Immediate(static_cast<int32_t>(kSmiTagMask | 0x80000000)));
+                 Immediate(static_cast<uint32_t>(kSmiTagMask | 0x80000000)));
         deferred->Branch(not_zero);
         if (int_value < 0) int_value = -int_value;
         if (int_value == 1) {
@@ -5894,7 +6063,7 @@ void Reference::GetValue(TypeofState typeof_state) {
 
         // Check that the key is a non-negative smi.
         __ testl(key.reg(),
-                 Immediate(static_cast<int32_t>(kSmiTagMask | 0x80000000u)));
+                 Immediate(static_cast<uint32_t>(kSmiTagMask | 0x80000000u)));
         deferred->Branch(not_zero);
 
         // Get the elements array from the receiver and check that it
@@ -5931,7 +6100,7 @@ void Reference::GetValue(TypeofState typeof_state) {
                         FixedArray::kHeaderSize - kHeapObjectTag));
         elements.Unuse();
         index.Unuse();
-        __ Cmp(value.reg(), Factory::the_hole_value());
+        __ CompareRoot(value.reg(), Heap::kTheHoleValueRootIndex);
         deferred->Branch(equal);
         __ IncrementCounter(&Counters::keyed_load_inline, 1);
 
@@ -6140,7 +6309,7 @@ void ToBooleanStub::Generate(MacroAssembler* masm) {
   __ movq(rax, Operand(rsp, 1 * kPointerSize));
 
   // 'null' => false.
-  __ Cmp(rax, Factory::null_value());
+  __ CompareRoot(rax, Heap::kNullValueRootIndex);
   __ j(equal, &false_result);
 
   // Get the map and type of the heap object.
@@ -6171,7 +6340,7 @@ void ToBooleanStub::Generate(MacroAssembler* masm) {
   __ bind(&not_string);
   // HeapNumber => false iff +0, -0, or NaN.
   // These three cases set C3 when compared to zero in the FPU.
-  __ Cmp(rdx, Factory::heap_number_map());
+  __ CompareRoot(rdx, Heap::kHeapNumberMapRootIndex);
   __ j(not_equal, &true_result);
   // TODO(x64): Don't use fp stack, use MMX registers?
   __ fldz();  // Load zero onto fp stack
@@ -6217,7 +6386,7 @@ bool CodeGenerator::FoldConstantSmis(Token::Value op, int left, int right) {
         if (answer >= Smi::kMinValue && answer <= Smi::kMaxValue) {
           // If the product is zero and the non-zero factor is negative,
           // the spec requires us to return floating point negative zero.
-          if (answer != 0 || (left >= 0 && right >= 0)) {
+          if (answer != 0 || (left + right) >= 0) {
             answer_object = Smi::FromInt(static_cast<int>(answer));
           }
         }
@@ -6285,24 +6454,54 @@ bool CodeGenerator::FoldConstantSmis(Token::Value op, int left, int right) {
 void UnarySubStub::Generate(MacroAssembler* masm) {
   Label slow;
   Label done;
-
+  Label try_float;
+  Label special;
   // Check whether the value is a smi.
   __ testl(rax, Immediate(kSmiTagMask));
-  // TODO(X64): Add inline code that handles floats, as on ia32 platform.
-  __ j(not_zero, &slow);
+  __ j(not_zero, &try_float);
+
   // Enter runtime system if the value of the smi is zero
   // to make sure that we switch between 0 and -0.
   // Also enter it if the value of the smi is Smi::kMinValue
   __ testl(rax, Immediate(0x7FFFFFFE));
-  __ j(zero, &slow);
+  __ j(zero, &special);
   __ neg(rax);
   __ jmp(&done);
+
+  __ bind(&special);
+  // Either zero or -0x4000000, neither of which become a smi when negated.
+  __ testl(rax, rax);
+  __ j(not_zero, &slow);
+  __ Move(rax, Factory::minus_zero_value());
+  __ jmp(&done);
+
   // Enter runtime system.
   __ bind(&slow);
   __ pop(rcx);  // pop return address
   __ push(rax);
   __ push(rcx);  // push return address
   __ InvokeBuiltin(Builtins::UNARY_MINUS, JUMP_FUNCTION);
+  __ jmp(&done);
+
+  // Try floating point case.
+  __ bind(&try_float);
+  __ movq(rdx, FieldOperand(rax, HeapObject::kMapOffset));
+  __ Cmp(rdx, Factory::heap_number_map());
+  __ j(not_equal, &slow);
+  // Operand is a float, negate its value by flipping sign bit.
+  __ movq(rdx, FieldOperand(rax, HeapNumber::kValueOffset));
+  __ movq(kScratchRegister, Immediate(0x01));
+  __ shl(kScratchRegister, Immediate(63));
+  __ xor_(rdx, kScratchRegister);  // Flip sign.
+  // rdx is value to store.
+  if (overwrite_) {
+    __ movq(FieldOperand(rax, HeapNumber::kValueOffset), rdx);
+  } else {
+    FloatingPointHelper::AllocateHeapNumber(masm, &slow, rbx, rcx);
+    // rcx: allocated 'empty' number
+    __ movq(FieldOperand(rcx, HeapNumber::kValueOffset), rdx);
+    __ movq(rax, rcx);
+  }
 
   __ bind(&done);
   __ StubReturn(1);
@@ -6377,7 +6576,7 @@ void CompareStub::Generate(MacroAssembler* masm) {
         // One operand is a smi.
 
         // Check whether the non-smi is a heap number.
-        ASSERT_EQ(1, kSmiTagMask);
+        ASSERT_EQ(static_cast<intptr_t>(1), kSmiTagMask);
         // rcx still holds rax & kSmiTag, which is either zero or one.
         __ decq(rcx);  // If rax is a smi, all 1s, else all 0s.
         __ movq(rbx, rdx);
@@ -6584,7 +6783,7 @@ void InstanceofStub::Generate(MacroAssembler* masm) {
 
   // Loop through the prototype chain looking for the function prototype.
   Label loop, is_instance, is_not_instance;
-  __ Move(kScratchRegister, Factory::null_value());
+  __ LoadRoot(kScratchRegister, Heap::kNullValueRootIndex);
   __ bind(&loop);
   __ cmpq(rcx, rbx);
   __ j(equal, &is_instance);
@@ -6618,7 +6817,7 @@ void ArgumentsAccessStub::GenerateNewObject(MacroAssembler* masm) {
   Label runtime;
   __ movq(rdx, Operand(rbp, StandardFrameConstants::kCallerFPOffset));
   __ movq(rcx, Operand(rdx, StandardFrameConstants::kContextOffset));
-  __ cmpq(rcx, Immediate(ArgumentsAdaptorFrame::SENTINEL));
+  __ cmpq(rcx, Immediate(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR)));
   __ j(not_equal, &runtime);
   // Value in rcx is Smi encoded.
 
@@ -6651,7 +6850,7 @@ void ArgumentsAccessStub::GenerateReadElement(MacroAssembler* masm) {
   Label adaptor;
   __ movq(rbx, Operand(rbp, StandardFrameConstants::kCallerFPOffset));
   __ movq(rcx, Operand(rbx, StandardFrameConstants::kContextOffset));
-  __ cmpq(rcx, Immediate(ArgumentsAdaptorFrame::SENTINEL));
+  __ cmpq(rcx, Immediate(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR)));
   __ j(equal, &adaptor);
 
   // Check index against formal parameters count limit passed in
@@ -6701,7 +6900,7 @@ void ArgumentsAccessStub::GenerateReadLength(MacroAssembler* masm) {
   Label adaptor;
   __ movq(rdx, Operand(rbp, StandardFrameConstants::kCallerFPOffset));
   __ movq(rcx, Operand(rdx, StandardFrameConstants::kContextOffset));
-  __ cmpq(rcx, Immediate(ArgumentsAdaptorFrame::SENTINEL));
+  __ cmpq(rcx, Immediate(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR)));
   __ j(equal, &adaptor);
 
   // Nothing to do: The formal number of parameters has already been
@@ -6763,10 +6962,10 @@ void CEntryStub::GenerateCore(MacroAssembler* masm,
 
   if (do_gc) {
     // Pass failure code returned from last attempt as first argument to GC.
-#ifdef __MSVC__
-    __ movq(rcx, rax);  // argc.
-#else  // ! defined(__MSVC__)
-    __ movq(rdi, rax);  // argv.
+#ifdef _WIN64
+    __ movq(rcx, rax);
+#else  // ! defined(_WIN64)
+    __ movq(rdi, rax);
 #endif
     __ movq(kScratchRegister,
             FUNCTION_ADDR(Runtime::PerformGC),
@@ -6782,11 +6981,14 @@ void CEntryStub::GenerateCore(MacroAssembler* masm,
   }
 
   // Call C function.
-#ifdef __MSVC__
-  // MSVC passes arguments in rcx, rdx, r8, r9
-  __ movq(rcx, r14);  // argc.
-  __ movq(rdx, r15);  // argv.
-#else  // ! defined(__MSVC__)
+#ifdef _WIN64
+  // Windows 64-bit ABI passes arguments in rcx, rdx, r8, r9
+  // Store Arguments object on stack, below the 4 WIN64 ABI parameter slots.
+  __ movq(Operand(rsp, 4 * kPointerSize), r14);  // argc.
+  __ movq(Operand(rsp, 5 * kPointerSize), r15);  // argv.
+  // Pass a pointer to the Arguments object as the first argument.
+  __ lea(rcx, Operand(rsp, 4 * kPointerSize));
+#else  // ! defined(_WIN64)
   // GCC passes arguments in rdi, rsi, rdx, rcx, r8, r9.
   __ movq(rdi, r14);  // argc.
   __ movq(rsi, r15);  // argv.
@@ -6835,7 +7037,7 @@ void CEntryStub::GenerateCore(MacroAssembler* masm,
 
   // Special handling of termination exceptions which are uncatchable
   // by javascript code.
-  __ Cmp(rax, Factory::termination_exception());
+  __ CompareRoot(rax, Heap::kTerminationExceptionRootIndex);
   __ j(equal, throw_termination_exception);
 
   // Handle normal exception.
@@ -7012,11 +7214,11 @@ void JSEntryStub::GenerateBody(MacroAssembler* masm, bool is_construct) {
   __ push(rbp);
   __ movq(rbp, rsp);
 
-  // Save callee-saved registers (X64 calling conventions).
+  // Push the stack frame type marker twice.
   int marker = is_construct ? StackFrame::ENTRY_CONSTRUCT : StackFrame::ENTRY;
-  // Push something that is not an arguments adaptor.
-  __ push(Immediate(ArgumentsAdaptorFrame::NON_SENTINEL));
-  __ push(Immediate(Smi::FromInt(marker)));  // @ function offset
+  __ push(Immediate(Smi::FromInt(marker)));  // context slot
+  __ push(Immediate(Smi::FromInt(marker)));  // function slot
+  // Save callee-saved registers (X64 calling conventions).
   __ push(r12);
   __ push(r13);
   __ push(r14);
@@ -7139,24 +7341,18 @@ void FloatingPointHelper::AllocateHeapNumber(MacroAssembler* masm,
                                              Label* need_gc,
                                              Register scratch,
                                              Register result) {
-  ExternalReference allocation_top =
-      ExternalReference::new_space_allocation_top_address();
-  ExternalReference allocation_limit =
-      ExternalReference::new_space_allocation_limit_address();
-  __ movq(scratch, allocation_top);  // scratch: address of allocation top.
-  __ movq(result, Operand(scratch, 0));
-  __ addq(result, Immediate(HeapNumber::kSize));  // New top.
-  __ movq(kScratchRegister, allocation_limit);
-  __ cmpq(result, Operand(kScratchRegister, 0));
-  __ j(above, need_gc);
-
-  __ movq(Operand(scratch, 0), result);  // store new top
-  __ addq(result, Immediate(kHeapObjectTag - HeapNumber::kSize));
-  __ movq(kScratchRegister,
-          Factory::heap_number_map(),
-          RelocInfo::EMBEDDED_OBJECT);
+  // Allocate heap number in new space.
+  __ AllocateObjectInNewSpace(HeapNumber::kSize,
+                              result,
+                              scratch,
+                              no_reg,
+                              need_gc,
+                              false);
+
+  // Set the map and tag the result.
+  __ addq(result, Immediate(kHeapObjectTag));
+  __ LoadRoot(kScratchRegister, Heap::kHeapNumberMapRootIndex);
   __ movq(FieldOperand(result, HeapObject::kMapOffset), kScratchRegister);
-  // Tag old top and use as result.
 }
 
 
@@ -7556,18 +7752,29 @@ void GenericBinaryOpStub::Generate(MacroAssembler* masm) {
         __ fild_s(Operand(rsp, 0 * kPointerSize));
         __ fucompp();
         __ fnstsw_ax();
-        __ sahf();  // TODO(X64): Not available.
-        __ j(not_zero, &operand_conversion_failure);
-        __ j(parity_even, &operand_conversion_failure);
-
+        if (CpuFeatures::IsSupported(CpuFeatures::SAHF)) {
+          __ sahf();
+          __ j(not_zero, &operand_conversion_failure);
+          __ j(parity_even, &operand_conversion_failure);
+        } else {
+          __ and_(rax, Immediate(0x4400));
+          __ cmpl(rax, Immediate(0x4000));
+          __ j(not_zero, &operand_conversion_failure);
+        }
         // Check if left operand is int32.
         __ fist_s(Operand(rsp, 1 * kPointerSize));
         __ fild_s(Operand(rsp, 1 * kPointerSize));
         __ fucompp();
         __ fnstsw_ax();
-        __ sahf();  // TODO(X64): Not available. Test bits in ax directly
-        __ j(not_zero, &operand_conversion_failure);
-        __ j(parity_even, &operand_conversion_failure);
+        if (CpuFeatures::IsSupported(CpuFeatures::SAHF)) {
+          __ sahf();
+          __ j(not_zero, &operand_conversion_failure);
+          __ j(parity_even, &operand_conversion_failure);
+        } else {
+          __ and_(rax, Immediate(0x4400));
+          __ cmpl(rax, Immediate(0x4000));
+          __ j(not_zero, &operand_conversion_failure);
+        }
       }
 
       // Get int32 operands and perform bitop.
diff --git a/deps/v8/src/x64/codegen-x64.h b/deps/v8/src/x64/codegen-x64.h
index bfdff5674..2ae8145e8 100644
--- a/deps/v8/src/x64/codegen-x64.h
+++ b/deps/v8/src/x64/codegen-x64.h
@@ -481,6 +481,14 @@ class CodeGenerator: public AstVisitor {
 
   void CallWithArguments(ZoneList<Expression*>* arguments, int position);
 
+  // Use an optimized version of Function.prototype.apply that avoid
+  // allocating the arguments object and just copies the arguments
+  // from the stack.
+  void CallApplyLazy(Property* apply,
+                     Expression* receiver,
+                     VariableProxy* arguments,
+                     int position);
+
   void CheckStack();
 
   struct InlineRuntimeLUT {
diff --git a/deps/v8/src/x64/frames-x64.h b/deps/v8/src/x64/frames-x64.h
index 24c78da99..5442be960 100644
--- a/deps/v8/src/x64/frames-x64.h
+++ b/deps/v8/src/x64/frames-x64.h
@@ -60,6 +60,7 @@ class StackHandlerConstants : public AllStatic {
 class EntryFrameConstants : public AllStatic {
  public:
   static const int kCallerFPOffset      = -10 * kPointerSize;
+  static const int kArgvOffset          = 6 * kPointerSize;
 };
 
 
@@ -90,10 +91,12 @@ class StandardFrameConstants : public AllStatic {
 
 class JavaScriptFrameConstants : public AllStatic {
  public:
+  // FP-relative.
   static const int kLocal0Offset = StandardFrameConstants::kExpressionsOffset;
   static const int kSavedRegistersOffset = +2 * kPointerSize;
   static const int kFunctionOffset = StandardFrameConstants::kMarkerOffset;
 
+  // Caller SP-relative.
   static const int kParam0Offset   = -2 * kPointerSize;
   static const int kReceiverOffset = -1 * kPointerSize;
 };
diff --git a/deps/v8/src/x64/ic-x64.cc b/deps/v8/src/x64/ic-x64.cc
index 1c74a44d0..e2f7c30d2 100644
--- a/deps/v8/src/x64/ic-x64.cc
+++ b/deps/v8/src/x64/ic-x64.cc
@@ -339,7 +339,7 @@ void KeyedLoadIC::GenerateGeneric(MacroAssembler* masm) {
   __ bind(&fast);
   __ movq(rax, Operand(rcx, rax, times_pointer_size,
                       FixedArray::kHeaderSize - kHeapObjectTag));
-  __ Cmp(rax, Factory::the_hole_value());
+  __ CompareRoot(rax, Heap::kTheHoleValueRootIndex);
   // In case the loaded value is the_hole we have to consult GetProperty
   // to ensure the prototype chain is searched.
   __ j(equal, &slow);
@@ -613,9 +613,9 @@ void CallIC::GenerateMegamorphic(MacroAssembler* masm, int argc) {
 
   // Check for boolean.
   __ bind(&non_string);
-  __ Cmp(rdx, Factory::true_value());
+  __ CompareRoot(rdx, Heap::kTrueValueRootIndex);
   __ j(equal, &boolean);
-  __ Cmp(rdx, Factory::false_value());
+  __ CompareRoot(rdx, Heap::kFalseValueRootIndex);
   __ j(not_equal, &miss);
   __ bind(&boolean);
   StubCompiler::GenerateLoadGlobalFunctionPrototype(
@@ -785,7 +785,19 @@ void LoadIC::GenerateArrayLength(MacroAssembler* masm) {
 
 
 void LoadIC::GenerateFunctionPrototype(MacroAssembler* masm) {
-  Generate(masm, ExternalReference(IC_Utility(kLoadIC_Miss)));
+  // ----------- S t a t e -------------
+  //  -- rcx    : name
+  //  -- rsp[0] : return address
+  //  -- rsp[8] : receiver
+  // -----------------------------------
+
+  Label miss;
+
+  __ movq(rax, Operand(rsp, kPointerSize));
+
+  StubCompiler::GenerateLoadFunctionPrototype(masm, rax, rdx, rbx, &miss);
+  __ bind(&miss);
+  StubCompiler::GenerateLoadMiss(masm, Code::LOAD_IC);
 }
 
 
@@ -805,7 +817,7 @@ void LoadIC::GenerateMegamorphic(MacroAssembler* masm) {
   StubCache::GenerateProbe(masm, flags, rax, rcx, rbx, rdx);
 
   // Cache miss: Jump to runtime.
-  Generate(masm, ExternalReference(IC_Utility(kLoadIC_Miss)));
+  StubCompiler::GenerateLoadMiss(masm, Code::LOAD_IC);
 }
 
 
@@ -819,7 +831,52 @@ void LoadIC::GenerateMiss(MacroAssembler* masm) {
   Generate(masm, ExternalReference(IC_Utility(kLoadIC_Miss)));
 }
 
+
 void LoadIC::GenerateNormal(MacroAssembler* masm) {
+  // ----------- S t a t e -------------
+  //  -- rcx    : name
+  //  -- rsp[0] : return address
+  //  -- rsp[8] : receiver
+  // -----------------------------------
+
+  Label miss, probe, global;
+
+  __ movq(rax, Operand(rsp, kPointerSize));
+
+  // Check that the receiver isn't a smi.
+  __ testl(rax, Immediate(kSmiTagMask));
+  __ j(zero, &miss);
+
+  // Check that the receiver is a valid JS object.
+  __ CmpObjectType(rax, FIRST_JS_OBJECT_TYPE, rbx);
+  __ j(below, &miss);
+
+  // If this assert fails, we have to check upper bound too.
+  ASSERT(LAST_TYPE == JS_FUNCTION_TYPE);
+
+  // Check for access to global object (unlikely).
+  __ CmpInstanceType(rbx, JS_GLOBAL_PROXY_TYPE);
+  __ j(equal, &global);
+
+  // Check for non-global object that requires access check.
+  __ testl(FieldOperand(rbx, Map::kBitFieldOffset),
+          Immediate(1 << Map::kIsAccessCheckNeeded));
+  __ j(not_zero, &miss);
+
+  // Search the dictionary placing the result in eax.
+  __ bind(&probe);
+  GenerateDictionaryLoad(masm, &miss, rdx, rax, rbx, rcx);
+  GenerateCheckNonObjectOrLoaded(masm, &miss, rax);
+  __ ret(0);
+
+  // Global object access: Check access rights.
+  __ bind(&global);
+  __ CheckAccessGlobalProxy(rax, rdx, &miss);
+  __ jmp(&probe);
+
+  // Cache miss: Restore receiver from stack and jump to runtime.
+  __ bind(&miss);
+  __ movq(rax, Operand(rsp, 1 * kPointerSize));
   Generate(masm, ExternalReference(IC_Utility(kLoadIC_Miss)));
 }
 
@@ -906,6 +963,21 @@ void StoreIC::GenerateExtendStorage(MacroAssembler* masm) {
 }
 
 void StoreIC::GenerateMegamorphic(MacroAssembler* masm) {
+  // ----------- S t a t e -------------
+  //  -- rax    : value
+  //  -- rcx    : name
+  //  -- rsp[0] : return address
+  //  -- rsp[8] : receiver
+  // -----------------------------------
+
+  // Get the receiver from the stack and probe the stub cache.
+  __ movq(rdx, Operand(rsp, kPointerSize));
+  Code::Flags flags = Code::ComputeFlags(Code::STORE_IC,
+                                         NOT_IN_LOOP,
+                                         MONOMORPHIC);
+  StubCache::GenerateProbe(masm, flags, rdx, rcx, rbx, no_reg);
+
+  // Cache miss: Jump to runtime.
   Generate(masm, ExternalReference(IC_Utility(kStoreIC_Miss)));
 }
 
diff --git a/deps/v8/src/x64/macro-assembler-x64.cc b/deps/v8/src/x64/macro-assembler-x64.cc
index 8f8398dc9..ae45eaba5 100644
--- a/deps/v8/src/x64/macro-assembler-x64.cc
+++ b/deps/v8/src/x64/macro-assembler-x64.cc
@@ -46,6 +46,22 @@ MacroAssembler::MacroAssembler(void* buffer, int size)
 }
 
 
+void MacroAssembler::LoadRoot(Register destination,
+                              Heap::RootListIndex index) {
+  movq(destination, Operand(r13, index << kPointerSizeLog2));
+}
+
+
+void MacroAssembler::PushRoot(Heap::RootListIndex index) {
+  push(Operand(r13, index << kPointerSizeLog2));
+}
+
+
+void MacroAssembler::CompareRoot(Register with,
+                                 Heap::RootListIndex index) {
+  cmpq(with, Operand(r13, index << kPointerSizeLog2));
+}
+
 
 static void RecordWriteHelper(MacroAssembler* masm,
                               Register object,
@@ -276,7 +292,7 @@ void MacroAssembler::IllegalOperation(int num_arguments) {
   if (num_arguments > 0) {
     addq(rsp, Immediate(num_arguments * kPointerSize));
   }
-  movq(rax, Factory::undefined_value(), RelocInfo::EMBEDDED_OBJECT);
+  LoadRoot(rax, Heap::kUndefinedValueRootIndex);
 }
 
 
@@ -584,8 +600,14 @@ void MacroAssembler::FCmp() {
   fcompp();
   push(rax);
   fnstsw_ax();
-  // TODO(X64): Check that sahf is safe to use, using CPUProbe.
-  sahf();
+  if (CpuFeatures::IsSupported(CpuFeatures::SAHF)) {
+    sahf();
+  } else {
+    shrl(rax, Immediate(8));
+    and_(rax, Immediate(0xFF));
+    push(rax);
+    popfq();
+  }
   pop(rax);
 }
 
@@ -628,7 +650,7 @@ void MacroAssembler::TryGetFunctionPrototype(Register function,
   // If the prototype or initial map is the hole, don't return it and
   // simply miss the cache instead. This will allow us to allocate a
   // prototype object on-demand in the runtime system.
-  Cmp(result, Factory::the_hole_value());
+  CompareRoot(result, Heap::kTheHoleValueRootIndex);
   j(equal, miss);
 
   // If the function does not have an initial map, we're done.
@@ -994,9 +1016,6 @@ void MacroAssembler::EnterExitFrame(StackFrame::Type type) {
   }
 #endif
 
-  // Reserve space for two arguments: argc and argv
-  subq(rsp, Immediate(2 * kPointerSize));
-
   // Get the required frame alignment for the OS.
   static const int kFrameAlignment = OS::ActivationFrameAlignment();
   if (kFrameAlignment > 0) {
@@ -1005,6 +1024,17 @@ void MacroAssembler::EnterExitFrame(StackFrame::Type type) {
     and_(rsp, kScratchRegister);
   }
 
+#ifdef _WIN64
+  // Reserve space for the Arguments object.  The Windows 64-bit ABI
+  // requires us to pass this structure as a pointer to its location on
+  // the stack.  The structure contains 2 pointers.
+  // The structure on the stack must be 16-byte aligned.
+  // We also need backing space for 4 parameters, even though
+  // we only pass one parameter, and it is in a register.
+  subq(rsp, Immediate(6 * kPointerSize));
+  ASSERT(kFrameAlignment == 2 * kPointerSize);  // Change the padding if needed.
+#endif
+
   // Patch the saved entry sp.
   movq(Operand(rbp, ExitFrameConstants::kSPOffset), rsp);
 }
@@ -1179,12 +1209,12 @@ void MacroAssembler::CheckAccessGlobalProxy(Register holder_reg,
     // Preserve original value of holder_reg.
     push(holder_reg);
     movq(holder_reg, FieldOperand(holder_reg, JSGlobalProxy::kContextOffset));
-    Cmp(holder_reg, Factory::null_value());
+    CompareRoot(holder_reg, Heap::kNullValueRootIndex);
     Check(not_equal, "JSGlobalProxy::context() should not be null.");
 
     // Read the first word and compare to global_context_map(),
     movq(holder_reg, FieldOperand(holder_reg, HeapObject::kMapOffset));
-    Cmp(holder_reg, Factory::global_context_map());
+    CompareRoot(holder_reg, Heap::kGlobalContextMapRootIndex);
     Check(equal, "JSGlobalObject::global_context should be a global context.");
     pop(holder_reg);
   }
@@ -1201,4 +1231,156 @@ void MacroAssembler::CheckAccessGlobalProxy(Register holder_reg,
 }
 
 
+void MacroAssembler::LoadAllocationTopHelper(
+    Register result,
+    Register result_end,
+    Register scratch,
+    bool result_contains_top_on_entry) {
+  ExternalReference new_space_allocation_top =
+      ExternalReference::new_space_allocation_top_address();
+
+  // Just return if allocation top is already known.
+  if (result_contains_top_on_entry) {
+    // No use of scratch if allocation top is provided.
+    ASSERT(scratch.is(no_reg));
+    return;
+  }
+
+  // Move address of new object to result. Use scratch register if available.
+  if (scratch.is(no_reg)) {
+    movq(kScratchRegister, new_space_allocation_top);
+    movq(result, Operand(kScratchRegister, 0));
+  } else {
+    ASSERT(!scratch.is(result_end));
+    movq(scratch, new_space_allocation_top);
+    movq(result, Operand(scratch, 0));
+  }
+}
+
+
+void MacroAssembler::UpdateAllocationTopHelper(Register result_end,
+                                               Register scratch) {
+  ExternalReference new_space_allocation_top =
+      ExternalReference::new_space_allocation_top_address();
+
+  // Update new top.
+  if (result_end.is(rax)) {
+    // rax can be stored directly to a memory location.
+    store_rax(new_space_allocation_top);
+  } else {
+    // Register required - use scratch provided if available.
+    if (scratch.is(no_reg)) {
+      movq(kScratchRegister, new_space_allocation_top);
+      movq(Operand(kScratchRegister, 0), result_end);
+    } else {
+      movq(Operand(scratch, 0), result_end);
+    }
+  }
+}
+
+
+void MacroAssembler::AllocateObjectInNewSpace(
+    int object_size,
+    Register result,
+    Register result_end,
+    Register scratch,
+    Label* gc_required,
+    bool result_contains_top_on_entry) {
+  ASSERT(!result.is(result_end));
+
+  // Load address of new object into result.
+  LoadAllocationTopHelper(result,
+                          result_end,
+                          scratch,
+                          result_contains_top_on_entry);
+
+  // Calculate new top and bail out if new space is exhausted.
+  ExternalReference new_space_allocation_limit =
+      ExternalReference::new_space_allocation_limit_address();
+  lea(result_end, Operand(result, object_size));
+  movq(kScratchRegister, new_space_allocation_limit);
+  cmpq(result_end, Operand(kScratchRegister, 0));
+  j(above, gc_required);
+
+  // Update allocation top.
+  UpdateAllocationTopHelper(result_end, scratch);
+}
+
+
+void MacroAssembler::AllocateObjectInNewSpace(
+    int header_size,
+    ScaleFactor element_size,
+    Register element_count,
+    Register result,
+    Register result_end,
+    Register scratch,
+    Label* gc_required,
+    bool result_contains_top_on_entry) {
+  ASSERT(!result.is(result_end));
+
+  // Load address of new object into result.
+  LoadAllocationTopHelper(result,
+                          result_end,
+                          scratch,
+                          result_contains_top_on_entry);
+
+  // Calculate new top and bail out if new space is exhausted.
+  ExternalReference new_space_allocation_limit =
+      ExternalReference::new_space_allocation_limit_address();
+  lea(result_end, Operand(result, element_count, element_size, header_size));
+  movq(kScratchRegister, new_space_allocation_limit);
+  cmpq(result_end, Operand(kScratchRegister, 0));
+  j(above, gc_required);
+
+  // Update allocation top.
+  UpdateAllocationTopHelper(result_end, scratch);
+}
+
+
+void MacroAssembler::AllocateObjectInNewSpace(
+    Register object_size,
+    Register result,
+    Register result_end,
+    Register scratch,
+    Label* gc_required,
+    bool result_contains_top_on_entry) {
+
+  // Load address of new object into result.
+  LoadAllocationTopHelper(result,
+                          result_end,
+                          scratch,
+                          result_contains_top_on_entry);
+
+
+  // Calculate new top and bail out if new space is exhausted.
+  ExternalReference new_space_allocation_limit =
+      ExternalReference::new_space_allocation_limit_address();
+  if (!object_size.is(result_end)) {
+    movq(result_end, object_size);
+  }
+  addq(result_end, result);
+  movq(kScratchRegister, new_space_allocation_limit);
+  cmpq(result_end, Operand(kScratchRegister, 0));
+  j(above, gc_required);
+
+  // Update allocation top.
+  UpdateAllocationTopHelper(result_end, scratch);
+}
+
+
+void MacroAssembler::UndoAllocationInNewSpace(Register object) {
+  ExternalReference new_space_allocation_top =
+      ExternalReference::new_space_allocation_top_address();
+
+  // Make sure the object has no tag before resetting top.
+  and_(object, Immediate(~kHeapObjectTagMask));
+  movq(kScratchRegister, new_space_allocation_top);
+#ifdef DEBUG
+  cmpq(object, Operand(kScratchRegister, 0));
+  Check(below, "Undo allocation of non allocated memory");
+#endif
+  movq(Operand(kScratchRegister, 0), object);
+}
+
+
 } }  // namespace v8::internal
diff --git a/deps/v8/src/x64/macro-assembler-x64.h b/deps/v8/src/x64/macro-assembler-x64.h
index cba55eb27..6f5c32c2b 100644
--- a/deps/v8/src/x64/macro-assembler-x64.h
+++ b/deps/v8/src/x64/macro-assembler-x64.h
@@ -66,6 +66,10 @@ class MacroAssembler: public Assembler {
  public:
   MacroAssembler(void* buffer, int size);
 
+  void LoadRoot(Register destination, Heap::RootListIndex index);
+  void CompareRoot(Register with, Heap::RootListIndex index);
+  void PushRoot(Heap::RootListIndex index);
+
   // ---------------------------------------------------------------------------
   // GC Support
 
@@ -223,6 +227,48 @@ class MacroAssembler: public Assembler {
 
 
   // ---------------------------------------------------------------------------
+  // Allocation support
+
+  // Allocate an object in new space. If the new space is exhausted control
+  // continues at the gc_required label. The allocated object is returned in
+  // result and end of the new object is returned in result_end. The register
+  // scratch can be passed as no_reg in which case an additional object
+  // reference will be added to the reloc info. The returned pointers in result
+  // and result_end have not yet been tagged as heap objects. If
+  // result_contains_top_on_entry is true the content of result is known to be
+  // the allocation top on entry (could be result_end from a previous call to
+  // AllocateObjectInNewSpace). If result_contains_top_on_entry is true scratch
+  // should be no_reg as it is never used.
+  void AllocateObjectInNewSpace(int object_size,
+                                Register result,
+                                Register result_end,
+                                Register scratch,
+                                Label* gc_required,
+                                bool result_contains_top_on_entry);
+
+  void AllocateObjectInNewSpace(int header_size,
+                                ScaleFactor element_size,
+                                Register element_count,
+                                Register result,
+                                Register result_end,
+                                Register scratch,
+                                Label* gc_required,
+                                bool result_contains_top_on_entry);
+
+  void AllocateObjectInNewSpace(Register object_size,
+                                Register result,
+                                Register result_end,
+                                Register scratch,
+                                Label* gc_required,
+                                bool result_contains_top_on_entry);
+
+  // Undo allocation in new space. The object passed and objects allocated after
+  // it will no longer be allocated. Make sure that no pointers are left to the
+  // object(s) no longer allocated as they would be invalid when allocation is
+  // un-done.
+  void UndoAllocationInNewSpace(Register object);
+
+  // ---------------------------------------------------------------------------
   // Support functions.
 
   // Check if result is zero and op is negative.
@@ -341,6 +387,13 @@ class MacroAssembler: public Assembler {
   // Activation support.
   void EnterFrame(StackFrame::Type type);
   void LeaveFrame(StackFrame::Type type);
+
+  // Allocation support helpers.
+  void LoadAllocationTopHelper(Register result,
+                               Register result_end,
+                               Register scratch,
+                               bool result_contains_top_on_entry);
+  void UpdateAllocationTopHelper(Register result_end, Register scratch);
 };
 
 
diff --git a/deps/v8/src/x64/regexp-macro-assembler-x64.cc b/deps/v8/src/x64/regexp-macro-assembler-x64.cc
index 1e38d6da9..373f35949 100644
--- a/deps/v8/src/x64/regexp-macro-assembler-x64.cc
+++ b/deps/v8/src/x64/regexp-macro-assembler-x64.cc
@@ -39,6 +39,8 @@
 namespace v8 {
 namespace internal {
 
+#ifdef V8_NATIVE_REGEXP
+
 /*
  * This assembler uses the following register assignment convention
  * - rdx : currently loaded character(s) as ASCII or UC16. Must be loaded using
@@ -110,6 +112,7 @@ RegExpMacroAssemblerX64::RegExpMacroAssemblerX64(
       success_label_(),
       backtrack_label_(),
       exit_label_() {
+  ASSERT_EQ(0, registers_to_save % 2);
   __ jmp(&entry_label_);   // We'll write the entry code when we know more.
   __ bind(&start_label_);  // And then continue from here.
 }
@@ -319,7 +322,7 @@ void RegExpMacroAssemblerX64::CheckNotBackReferenceIgnoreCase(
   } else {
     ASSERT(mode_ == UC16);
     // Save important/volatile registers before calling C function.
-#ifndef __MSVC__
+#ifndef _WIN64
     // Callee save on Win64
     __ push(rsi);
     __ push(rdi);
@@ -333,7 +336,7 @@ void RegExpMacroAssemblerX64::CheckNotBackReferenceIgnoreCase(
     //   Address byte_offset1 - Address captured substring's start.
     //   Address byte_offset2 - Address of current character position.
     //   size_t byte_length - length of capture in bytes(!)
-#ifdef __MSVC__
+#ifdef _WIN64
     // Compute and set byte_offset1 (start of capture).
     __ lea(rcx, Operand(rsi, rdx, times_1, 0));
     // Set byte_offset2.
@@ -350,13 +353,14 @@ void RegExpMacroAssemblerX64::CheckNotBackReferenceIgnoreCase(
     // Set byte_length.
     __ movq(rdx, rbx);
 #endif
-    Address function_address = FUNCTION_ADDR(&CaseInsensitiveCompareUC16);
-    CallCFunction(function_address, num_arguments);
+    ExternalReference compare =
+        ExternalReference::re_case_insensitive_compare_uc16();
+    CallCFunction(compare, num_arguments);
 
     // Restore original values before reacting on result value.
     __ Move(code_object_pointer(), masm_->CodeObject());
     __ pop(backtrack_stackpointer());
-#ifndef __MSVC__
+#ifndef _WIN64
     __ pop(rdi);
     __ pop(rsi);
 #endif
@@ -604,7 +608,7 @@ Handle<Object> RegExpMacroAssemblerX64::GetCode(Handle<String> source) {
   __ movq(rbp, rsp);
   // Save parameters and callee-save registers. Order here should correspond
   //  to order of kBackup_ebx etc.
-#ifdef __MSVC__
+#ifdef _WIN64
   // MSVC passes arguments in rcx, rdx, r8, r9, with backing stack slots.
   // Store register parameters in pre-allocated stack slots,
   __ movq(Operand(rbp, kInputString), rcx);
@@ -740,7 +744,7 @@ Handle<Object> RegExpMacroAssemblerX64::GetCode(Handle<String> source) {
   // Exit and return rax
   __ bind(&exit_label_);
 
-#ifdef __MSVC__
+#ifdef _WIN64
   // Restore callee save registers.
   __ lea(rsp, Operand(rbp, kLastCalleeSaveRegister));
   __ pop(rbx);
@@ -794,7 +798,7 @@ Handle<Object> RegExpMacroAssemblerX64::GetCode(Handle<String> source) {
 
     Label grow_failed;
     // Save registers before calling C function
-#ifndef __MSVC__
+#ifndef _WIN64
     // Callee-save in Microsoft 64-bit ABI, but not in AMD64 ABI.
     __ push(rsi);
     __ push(rdi);
@@ -803,16 +807,17 @@ Handle<Object> RegExpMacroAssemblerX64::GetCode(Handle<String> source) {
     // Call GrowStack(backtrack_stackpointer())
     int num_arguments = 2;
     FrameAlign(num_arguments);
-#ifdef __MSVC__
+#ifdef _WIN64
     // Microsoft passes parameters in rcx, rdx.
     // First argument, backtrack stackpointer, is already in rcx.
     __ lea(rdx, Operand(rbp, kStackHighEnd));  // Second argument
 #else
-    // AMD64 ABI passes paremeters in rdi, rsi.
+    // AMD64 ABI passes parameters in rdi, rsi.
     __ movq(rdi, backtrack_stackpointer());   // First argument.
     __ lea(rsi, Operand(rbp, kStackHighEnd));  // Second argument.
 #endif
-    CallCFunction(FUNCTION_ADDR(&GrowStack), num_arguments);
+    ExternalReference grow_stack = ExternalReference::re_grow_stack();
+    CallCFunction(grow_stack, num_arguments);
     // If return NULL, we have failed to grow the stack, and
     // must exit with a stack-overflow exception.
     __ testq(rax, rax);
@@ -821,7 +826,7 @@ Handle<Object> RegExpMacroAssemblerX64::GetCode(Handle<String> source) {
     __ movq(backtrack_stackpointer(), rax);
     // Restore saved registers and continue.
     __ Move(code_object_pointer(), masm_->CodeObject());
-#ifndef __MSVC__
+#ifndef _WIN64
     __ pop(rdi);
     __ pop(rsi);
 #endif
@@ -889,7 +894,9 @@ void RegExpMacroAssemblerX64::LoadCurrentCharacter(int cp_offset,
                                                    int characters) {
   ASSERT(cp_offset >= -1);      // ^ and \b can look behind one character.
   ASSERT(cp_offset < (1<<30));  // Be sane! (And ensure negation works)
-  CheckPosition(cp_offset + characters - 1, on_end_of_input);
+  if (check_bounds) {
+    CheckPosition(cp_offset + characters - 1, on_end_of_input);
+  }
   LoadCurrentCharacterUnchecked(cp_offset, characters);
 }
 
@@ -980,7 +987,7 @@ void RegExpMacroAssemblerX64::CallCheckStackGuardState() {
   // store anything volatile in a C call or overwritten by this function.
   int num_arguments = 3;
   FrameAlign(num_arguments);
-#ifdef __MSVC__
+#ifdef _WIN64
   // Second argument: Code* of self. (Do this before overwriting r8).
   __ movq(rdx, code_object_pointer());
   // Third argument: RegExp code frame pointer.
@@ -997,7 +1004,9 @@ void RegExpMacroAssemblerX64::CallCheckStackGuardState() {
   // return address).
   __ lea(rdi, Operand(rsp, -kPointerSize));
 #endif
-  CallCFunction(FUNCTION_ADDR(&CheckStackGuardState), num_arguments);
+  ExternalReference stack_check =
+      ExternalReference::re_check_stack_guard_state();
+  CallCFunction(stack_check, num_arguments);
 }
 
 
@@ -1080,23 +1089,6 @@ int RegExpMacroAssemblerX64::CheckStackGuardState(Address* return_address,
 }
 
 
-Address RegExpMacroAssemblerX64::GrowStack(Address stack_pointer,
-                                           Address* stack_base) {
-  size_t size = RegExpStack::stack_capacity();
-  Address old_stack_base = RegExpStack::stack_base();
-  ASSERT(old_stack_base == *stack_base);
-  ASSERT(stack_pointer <= old_stack_base);
-  ASSERT(static_cast<size_t>(old_stack_base - stack_pointer) <= size);
-  Address new_stack_base = RegExpStack::EnsureCapacity(size * 2);
-  if (new_stack_base == NULL) {
-    return NULL;
-  }
-  *stack_base = new_stack_base;
-  intptr_t stack_content_size = old_stack_base - stack_pointer;
-  return new_stack_base - stack_content_size;
-}
-
-
 Operand RegExpMacroAssemblerX64::register_location(int register_index) {
   ASSERT(register_index < (1<<30));
   if (num_registers_ <= register_index) {
@@ -1242,10 +1234,10 @@ void RegExpMacroAssemblerX64::FrameAlign(int num_arguments) {
   // (on Win64 only) and the original value of rsp.
   __ movq(kScratchRegister, rsp);
   ASSERT(IsPowerOf2(frameAlignment));
-#ifdef __MSVC__
+#ifdef _WIN64
   // Allocate space for parameters and old rsp.
   __ subq(rsp, Immediate((num_arguments + 1) * kPointerSize));
-  __ and_(rsp, -frameAlignment);
+  __ and_(rsp, Immediate(-frameAlignment));
   __ movq(Operand(rsp, num_arguments * kPointerSize), kScratchRegister);
 #else
   // Allocate space for old rsp.
@@ -1256,17 +1248,16 @@ void RegExpMacroAssemblerX64::FrameAlign(int num_arguments) {
 }
 
 
-void RegExpMacroAssemblerX64::CallCFunction(Address function_address,
+void RegExpMacroAssemblerX64::CallCFunction(ExternalReference function,
                                             int num_arguments) {
-  // Don't compile regexps with serialization enabled. The addresses of the C++
-  // function being called isn't relocatable.
-  ASSERT(!Serializer::enabled());
-  __ movq(rax, reinterpret_cast<intptr_t>(function_address), RelocInfo::NONE);
+  __ movq(rax, function);
   __ call(rax);
   ASSERT(OS::ActivationFrameAlignment() != 0);
-#ifdef __MSVC__
+#ifdef _WIN64
   __ movq(rsp, Operand(rsp, num_arguments * kPointerSize));
 #else
+  // All arguments passed in registers.
+  ASSERT(num_arguments <= 6);
   __ pop(rsp);
 #endif
 }
@@ -1297,5 +1288,12 @@ void RegExpMacroAssemblerX64::LoadCurrentCharacterUnchecked(int cp_offset,
 }
 
 
+void RegExpCEntryStub::Generate(MacroAssembler* masm_) {
+  __ int3();  // Unused on x64.
+}
+
 #undef __
+
+#endif  // V8_NATIVE_REGEXP
+
 }}  // namespace v8::internal
diff --git a/deps/v8/src/x64/regexp-macro-assembler-x64.h b/deps/v8/src/x64/regexp-macro-assembler-x64.h
index a270bc186..ab9647704 100644
--- a/deps/v8/src/x64/regexp-macro-assembler-x64.h
+++ b/deps/v8/src/x64/regexp-macro-assembler-x64.h
@@ -31,6 +31,8 @@
 namespace v8 {
 namespace internal {
 
+#ifdef V8_NATIVE_REGEXP
+
 class RegExpMacroAssemblerX64: public NativeRegExpMacroAssembler {
  public:
   RegExpMacroAssemblerX64(Mode mode, int registers_to_save);
@@ -113,6 +115,13 @@ class RegExpMacroAssemblerX64: public NativeRegExpMacroAssembler {
                         int* output,
                         bool at_start);
 
+  // Called from RegExp if the stack-guard is triggered.
+  // If the code object is relocated, the return address is fixed before
+  // returning.
+  static int CheckStackGuardState(Address* return_address,
+                                  Code* re_code,
+                                  Address re_frame);
+
  private:
   // Offsets from rbp of function parameters and stored registers.
   static const int kFramePointer = 0;
@@ -181,23 +190,9 @@ class RegExpMacroAssemblerX64: public NativeRegExpMacroAssembler {
   // Check whether we are exceeding the stack limit on the backtrack stack.
   void CheckStackLimit();
 
-  // Called from RegExp if the stack-guard is triggered.
-  // If the code object is relocated, the return address is fixed before
-  // returning.
-  static int CheckStackGuardState(Address* return_address,
-                                  Code* re_code,
-                                  Address re_frame);
-
   // Generate a call to CheckStackGuardState.
   void CallCheckStackGuardState();
 
-  // Called from RegExp if the backtrack stack limit is hit.
-  // Tries to expand the stack. Returns the new stack-pointer if
-  // successful, and updates the stack_top address, or returns 0 if unable
-  // to grow the stack.
-  // This function must not trigger a garbage collection.
-  static Address GrowStack(Address stack_pointer, Address* stack_top);
-
   // The rbp-relative location of a regexp register.
   Operand register_location(int register_index);
 
@@ -264,7 +259,7 @@ class RegExpMacroAssemblerX64: public NativeRegExpMacroAssembler {
   // by FrameAlign. The called function is not allowed to trigger a garbage
   // collection, since that might move the code and invalidate the return
   // address (unless this is somehow accounted for by the called function).
-  inline void CallCFunction(Address function_address, int num_arguments);
+  inline void CallCFunction(ExternalReference function, int num_arguments);
 
   MacroAssembler* masm_;
 
@@ -290,6 +285,8 @@ class RegExpMacroAssemblerX64: public NativeRegExpMacroAssembler {
   Label stack_overflow_label_;
 };
 
+#endif  // V8_NATIVE_REGEXP
+
 }}  // namespace v8::internal
 
 #endif  // V8_X64_REGEXP_MACRO_ASSEMBLER_X64_H_
diff --git a/deps/v8/src/x64/register-allocator-x64-inl.h b/deps/v8/src/x64/register-allocator-x64-inl.h
index 54729d6d9..d630b335a 100644
--- a/deps/v8/src/x64/register-allocator-x64-inl.h
+++ b/deps/v8/src/x64/register-allocator-x64-inl.h
@@ -51,18 +51,18 @@ int RegisterAllocator::ToNumber(Register reg) {
     2,   // rcx
     3,   // rdx
     1,   // rbx
-    -1,  // rsp
-    -1,  // rbp
-    -1,  // rsi
+    -1,  // rsp  Stack pointer.
+    -1,  // rbp  Frame pointer.
+    -1,  // rsi  Context.
     4,   // rdi
     5,   // r8
     6,   // r9
-    -1,  // r10
-    7,   // r11
-    11,  // r12
-    10,   // r13
-    8,   // r14
-    9   // r15
+    -1,  // r10  Scratch register.
+    9,   // r11
+    10,  // r12
+    -1,  // r13  Roots array.  This is callee saved.
+    7,   // r14
+    8    // r15
   };
   return kNumbers[reg.code()];
 }
@@ -71,7 +71,7 @@ int RegisterAllocator::ToNumber(Register reg) {
 Register RegisterAllocator::ToRegister(int num) {
   ASSERT(num >= 0 && num < kNumRegisters);
   const Register kRegisters[] =
-      { rax, rbx, rcx, rdx, rdi, r8, r9, r11, r14, r15, r13, r12 };
+      { rax, rbx, rcx, rdx, rdi, r8, r9, r14, r15, r11, r12 };
   return kRegisters[num];
 }
 
diff --git a/deps/v8/src/x64/register-allocator-x64.h b/deps/v8/src/x64/register-allocator-x64.h
index 86727962e..8d666d223 100644
--- a/deps/v8/src/x64/register-allocator-x64.h
+++ b/deps/v8/src/x64/register-allocator-x64.h
@@ -33,9 +33,7 @@ namespace internal {
 
 class RegisterAllocatorConstants : public AllStatic {
  public:
-  // Register allocation is not yet implemented on x64, but C++
-  // forbids 0-length arrays so we use 1 as the number of registers.
-  static const int kNumRegisters = 12;
+  static const int kNumRegisters = 11;
   static const int kInvalidRegister = -1;
 };
 
diff --git a/deps/v8/src/x64/simulator-x64.h b/deps/v8/src/x64/simulator-x64.h
index 6b4d718f6..184c166bc 100644
--- a/deps/v8/src/x64/simulator-x64.h
+++ b/deps/v8/src/x64/simulator-x64.h
@@ -45,4 +45,9 @@
   (reinterpret_cast<uintptr_t>(this) >= limit ? \
       reinterpret_cast<uintptr_t>(this) - limit : 0)
 
+// Call the generated regexp code directly. The entry function pointer should
+// expect seven int/pointer sized arguments and return an int.
+#define CALL_GENERATED_REGEXP_CODE(entry, p0, p1, p2, p3, p4, p5, p6) \
+  entry(p0, p1, p2, p3, p4, p5, p6)
+
 #endif  // V8_X64_SIMULATOR_X64_H_
diff --git a/deps/v8/src/x64/stub-cache-x64.cc b/deps/v8/src/x64/stub-cache-x64.cc
index 091c826cc..fcddfc4e7 100644
--- a/deps/v8/src/x64/stub-cache-x64.cc
+++ b/deps/v8/src/x64/stub-cache-x64.cc
@@ -434,7 +434,7 @@ class LoadInterceptorCompiler BASE_EMBEDDED {
                                            holder_obj);
 
     Label interceptor_failed;
-    __ Cmp(rax, Factory::no_interceptor_result_sentinel());
+    __ CompareRoot(rax, Heap::kNoInterceptorResultSentinelRootIndex);
     __ j(equal, &interceptor_failed);
     __ LeaveInternalFrame();
     __ ret(0);
@@ -612,7 +612,7 @@ class CallInterceptorCompiler BASE_EMBEDDED {
     __ pop(receiver);  // restore holder
     __ LeaveInternalFrame();
 
-    __ Cmp(rax, Factory::no_interceptor_result_sentinel());
+    __ CompareRoot(rax, Heap::kNoInterceptorResultSentinelRootIndex);
     Label invoke;
     __ j(not_equal, &invoke);
 
@@ -755,9 +755,9 @@ Object* CallStubCompiler::CompileCallConstant(Object* object,
     case BOOLEAN_CHECK: {
       Label fast;
       // Check that the object is a boolean.
-      __ Cmp(rdx, Factory::true_value());
+      __ CompareRoot(rdx, Heap::kTrueValueRootIndex);
       __ j(equal, &fast);
-      __ Cmp(rdx, Factory::false_value());
+      __ CompareRoot(rdx, Heap::kFalseValueRootIndex);
       __ j(not_equal, &miss);
       __ bind(&fast);
       // Check that the maps starting from the prototype haven't changed.
@@ -1125,10 +1125,10 @@ Object* LoadStubCompiler::CompileLoadGlobal(JSObject* object,
 
   // Check for deleted property if property can actually be deleted.
   if (!is_dont_delete) {
-    __ Cmp(rax, Factory::the_hole_value());
+    __ CompareRoot(rax, Heap::kTheHoleValueRootIndex);
     __ j(equal, &miss);
   } else if (FLAG_debug_code) {
-    __ Cmp(rax, Factory::the_hole_value());
+    __ CompareRoot(rax, Heap::kTheHoleValueRootIndex);
     __ Check(not_equal, "DontDelete cells can't contain the hole");
   }
 
@@ -1738,6 +1738,136 @@ void StubCompiler::GenerateLoadConstant(JSObject* object,
 }
 
 
+// Specialized stub for constructing objects from functions which only have only
+// simple assignments of the form this.x = ...; in their body.
+Object* ConstructStubCompiler::CompileConstructStub(
+    SharedFunctionInfo* shared) {
+  // ----------- S t a t e -------------
+  //  -- rax : argc
+  //  -- rdi : constructor
+  //  -- rsp[0] : return address
+  //  -- rsp[4] : last argument
+  // -----------------------------------
+  Label generic_stub_call;
+
+  // Use r8 for holding undefined which is used in several places below.
+  __ Move(r8, Factory::undefined_value());
+
+#ifdef ENABLE_DEBUGGER_SUPPORT
+  // Check to see whether there are any break points in the function code. If
+  // there are jump to the generic constructor stub which calls the actual
+  // code for the function thereby hitting the break points.
+  __ movq(rbx, FieldOperand(rdi, JSFunction::kSharedFunctionInfoOffset));
+  __ movq(rbx, FieldOperand(rbx, SharedFunctionInfo::kDebugInfoOffset));
+  __ cmpq(rbx, r8);
+  __ j(not_equal, &generic_stub_call);
+#endif
+
+  // Load the initial map and verify that it is in fact a map.
+  __ movq(rbx, FieldOperand(rdi, JSFunction::kPrototypeOrInitialMapOffset));
+  // Will both indicate a NULL and a Smi.
+  __ testq(rbx, Immediate(kSmiTagMask));
+  __ j(zero, &generic_stub_call);
+  __ CmpObjectType(rbx, MAP_TYPE, rcx);
+  __ j(not_equal, &generic_stub_call);
+
+#ifdef DEBUG
+  // Cannot construct functions this way.
+  // rdi: constructor
+  // rbx: initial map
+  __ CmpInstanceType(rbx, JS_FUNCTION_TYPE);
+  __ Assert(not_equal, "Function constructed by construct stub.");
+#endif
+
+  // Now allocate the JSObject in new space.
+  // rdi: constructor
+  // rbx: initial map
+  __ movzxbq(rcx, FieldOperand(rbx, Map::kInstanceSizeOffset));
+  __ shl(rcx, Immediate(kPointerSizeLog2));
+  // Make sure that the maximum heap object size will never cause us
+  // problems here.
+  ASSERT(Heap::MaxObjectSizeInPagedSpace() >= JSObject::kMaxInstanceSize);
+  __ AllocateObjectInNewSpace(rcx, rdx, rcx, no_reg, &generic_stub_call, false);
+
+  // Allocated the JSObject, now initialize the fields and add the heap tag.
+  // rbx: initial map
+  // rdx: JSObject (untagged)
+  __ movq(Operand(rdx, JSObject::kMapOffset), rbx);
+  __ Move(rbx, Factory::empty_fixed_array());
+  __ movq(Operand(rdx, JSObject::kPropertiesOffset), rbx);
+  __ movq(Operand(rdx, JSObject::kElementsOffset), rbx);
+
+  // rax: argc
+  // rdx: JSObject (untagged)
+  // Load the address of the first in-object property into r9.
+  __ lea(r9, Operand(rdx, JSObject::kHeaderSize));
+  // Calculate the location of the first argument. The stack contains only the
+  // return address on top of the argc arguments.
+  __ lea(rcx, Operand(rsp, rax, times_pointer_size, 0));
+
+  // rax: argc
+  // rcx: first argument
+  // rdx: JSObject (untagged)
+  // r8: undefined
+  // r9: first in-object property of the JSObject
+  // Fill the initialized properties with a constant value or a passed argument
+  // depending on the this.x = ...; assignment in the function.
+  for (int i = 0; i < shared->this_property_assignments_count(); i++) {
+    if (shared->IsThisPropertyAssignmentArgument(i)) {
+      Label not_passed;
+      // Set the property to undefined.
+      __ movq(Operand(r9, i * kPointerSize), r8);
+      // Check if the argument assigned to the property is actually passed.
+      int arg_number = shared->GetThisPropertyAssignmentArgument(i);
+      __ cmpq(rax, Immediate(arg_number));
+      __ j(below_equal, &not_passed);
+      // Argument passed - find it on the stack.
+      __ movq(rbx, Operand(rcx, arg_number * -kPointerSize));
+      __ movq(Operand(r9, i * kPointerSize), rbx);
+      __ bind(&not_passed);
+    } else {
+      // Set the property to the constant value.
+      Handle<Object> constant(shared->GetThisPropertyAssignmentConstant(i));
+      __ Move(Operand(r9, i * kPointerSize), constant);
+    }
+  }
+
+  // Fill the unused in-object property fields with undefined.
+  for (int i = shared->this_property_assignments_count();
+       i < shared->CalculateInObjectProperties();
+       i++) {
+    __ movq(Operand(r9, i * kPointerSize), r8);
+  }
+
+  // rax: argc
+  // rdx: JSObject (untagged)
+  // Move argc to rbx and the JSObject to return to rax and tag it.
+  __ movq(rbx, rax);
+  __ movq(rax, rdx);
+  __ or_(rax, Immediate(kHeapObjectTag));
+
+  // rax: JSObject
+  // rbx: argc
+  // Remove caller arguments and receiver from the stack and return.
+  __ pop(rcx);
+  __ lea(rsp, Operand(rsp, rbx, times_pointer_size, 1 * kPointerSize));
+  __ push(rcx);
+  __ IncrementCounter(&Counters::constructed_objects, 1);
+  __ IncrementCounter(&Counters::constructed_objects_stub, 1);
+  __ ret(0);
+
+  // Jump to the generic stub in case the specialized code cannot handle the
+  // construction.
+  __ bind(&generic_stub_call);
+  Code* code = Builtins::builtin(Builtins::JSConstructStubGeneric);
+  Handle<Code> generic_construct_stub(code);
+  __ Jump(generic_construct_stub, RelocInfo::CODE_TARGET);
+
+  // Return the generated code.
+  return GetCode();
+}
+
+
 #undef __
 
 } }  // namespace v8::internal
diff --git a/deps/v8/src/x64/virtual-frame-x64.cc b/deps/v8/src/x64/virtual-frame-x64.cc
index fb911a187..c2866a714 100644
--- a/deps/v8/src/x64/virtual-frame-x64.cc
+++ b/deps/v8/src/x64/virtual-frame-x64.cc
@@ -205,6 +205,14 @@ void VirtualFrame::EmitPush(Handle<Object> value) {
 }
 
 
+void VirtualFrame::EmitPush(Heap::RootListIndex index) {
+  ASSERT(stack_pointer_ == element_count() - 1);
+  elements_.Add(FrameElement::MemoryElement());
+  stack_pointer_++;
+  __ PushRoot(index);
+}
+
+
 void VirtualFrame::Drop(int count) {
   ASSERT(count >= 0);
   ASSERT(height() >= count);
diff --git a/deps/v8/src/x64/virtual-frame-x64.h b/deps/v8/src/x64/virtual-frame-x64.h
index 577a18bd4..006148d7d 100644
--- a/deps/v8/src/x64/virtual-frame-x64.h
+++ b/deps/v8/src/x64/virtual-frame-x64.h
@@ -375,6 +375,7 @@ class VirtualFrame : public ZoneObject {
   // corresponding push instruction.
   void EmitPush(Register reg);
   void EmitPush(const Operand& operand);
+  void EmitPush(Heap::RootListIndex index);
   void EmitPush(Immediate immediate);
   // Uses kScratchRegister, emits appropriate relocation info.
   void EmitPush(Handle<Object> value);
diff --git a/deps/v8/test/cctest/cctest.status b/deps/v8/test/cctest/cctest.status
index 68aabb516..67e9d8a45 100644
--- a/deps/v8/test/cctest/cctest.status
+++ b/deps/v8/test/cctest/cctest.status
@@ -50,6 +50,10 @@ test-api/RegExpInterruption: SKIP
 test-api/OutOfMemory: SKIP
 test-api/OutOfMemoryNested: SKIP
 
+# BUG(432): Fail on ARM hardware.
+test-regexp/MacroAssemblerNativeSimple: PASS || FAIL
+test-regexp/MacroAssemblerNativeSimpleUC16: PASS || FAIL
+
 # BUG(355): Test crashes on ARM.
 test-log/ProfLazyMode: SKIP
 
diff --git a/deps/v8/test/cctest/test-api.cc b/deps/v8/test/cctest/test-api.cc
index c8f855b11..80f91d39b 100644
--- a/deps/v8/test/cctest/test-api.cc
+++ b/deps/v8/test/cctest/test-api.cc
@@ -2673,40 +2673,67 @@ THREADED_TEST(SimpleExtensions) {
 }
 
 
-static const char* kEvalExtensionSource =
-  "function UseEval() {"
+static const char* kEvalExtensionSource1 =
+  "function UseEval1() {"
   "  var x = 42;"
   "  return eval('x');"
   "}";
 
 
+static const char* kEvalExtensionSource2 =
+  "(function() {"
+  "  var x = 42;"
+  "  function e() {"
+  "    return eval('x');"
+  "  }"
+  "  this.UseEval2 = e;"
+  "})()";
+
+
 THREADED_TEST(UseEvalFromExtension) {
   v8::HandleScope handle_scope;
-  v8::RegisterExtension(new Extension("evaltest", kEvalExtensionSource));
-  const char* extension_names[] = { "evaltest" };
-  v8::ExtensionConfiguration extensions(1, extension_names);
+  v8::RegisterExtension(new Extension("evaltest1", kEvalExtensionSource1));
+  v8::RegisterExtension(new Extension("evaltest2", kEvalExtensionSource2));
+  const char* extension_names[] = { "evaltest1", "evaltest2" };
+  v8::ExtensionConfiguration extensions(2, extension_names);
   v8::Handle<Context> context = Context::New(&extensions);
   Context::Scope lock(context);
-  v8::Handle<Value> result = Script::Compile(v8_str("UseEval()"))->Run();
+  v8::Handle<Value> result = Script::Compile(v8_str("UseEval1()"))->Run();
+  CHECK_EQ(result, v8::Integer::New(42));
+  result = Script::Compile(v8_str("UseEval2()"))->Run();
   CHECK_EQ(result, v8::Integer::New(42));
 }
 
 
-static const char* kWithExtensionSource =
-  "function UseWith() {"
+static const char* kWithExtensionSource1 =
+  "function UseWith1() {"
   "  var x = 42;"
   "  with({x:87}) { return x; }"
   "}";
 
 
+
+static const char* kWithExtensionSource2 =
+  "(function() {"
+  "  var x = 42;"
+  "  function e() {"
+  "    with ({x:87}) { return x; }"
+  "  }"
+  "  this.UseWith2 = e;"
+  "})()";
+
+
 THREADED_TEST(UseWithFromExtension) {
   v8::HandleScope handle_scope;
-  v8::RegisterExtension(new Extension("withtest", kWithExtensionSource));
-  const char* extension_names[] = { "withtest" };
-  v8::ExtensionConfiguration extensions(1, extension_names);
+  v8::RegisterExtension(new Extension("withtest1", kWithExtensionSource1));
+  v8::RegisterExtension(new Extension("withtest2", kWithExtensionSource2));
+  const char* extension_names[] = { "withtest1", "withtest2" };
+  v8::ExtensionConfiguration extensions(2, extension_names);
   v8::Handle<Context> context = Context::New(&extensions);
   Context::Scope lock(context);
-  v8::Handle<Value> result = Script::Compile(v8_str("UseWith()"))->Run();
+  v8::Handle<Value> result = Script::Compile(v8_str("UseWith1()"))->Run();
+  CHECK_EQ(result, v8::Integer::New(87));
+  result = Script::Compile(v8_str("UseWith2()"))->Run();
   CHECK_EQ(result, v8::Integer::New(87));
 }
 
@@ -7815,6 +7842,7 @@ THREADED_TEST(PixelArray) {
   free(pixel_data);
 }
 
+
 THREADED_TEST(ScriptContextDependence) {
   v8::HandleScope scope;
   LocalContext c1;
@@ -7830,6 +7858,7 @@ THREADED_TEST(ScriptContextDependence) {
   CHECK_EQ(indep->Run()->Int32Value(), 101);
 }
 
+
 THREADED_TEST(StackTrace) {
   v8::HandleScope scope;
   LocalContext context;
@@ -7842,3 +7871,11 @@ THREADED_TEST(StackTrace) {
   v8::String::Utf8Value stack(try_catch.StackTrace());
   CHECK(strstr(*stack, "at foo (stack-trace-test") != NULL);
 }
+
+
+// Test that idle notification can be handled when V8 has not yet been
+// set up.
+THREADED_TEST(IdleNotification) {
+  for (int i = 0; i < 100; i++) v8::V8::IdleNotification(true);
+  for (int i = 0; i < 100; i++) v8::V8::IdleNotification(false);
+}
diff --git a/deps/v8/test/cctest/test-assembler-arm.cc b/deps/v8/test/cctest/test-assembler-arm.cc
index fe1621c2a..34f16395e 100644
--- a/deps/v8/test/cctest/test-assembler-arm.cc
+++ b/deps/v8/test/cctest/test-assembler-arm.cc
@@ -185,7 +185,7 @@ TEST(3) {
   Label L, C;
 
   __ mov(ip, Operand(sp));
-  __ stm(db_w, sp, r4.bit() | fp.bit() | sp.bit() | lr.bit());
+  __ stm(db_w, sp, r4.bit() | fp.bit() | lr.bit());
   __ sub(fp, ip, Operand(4));
   __ mov(r4, Operand(r0));
   __ ldr(r0, MemOperand(r4, OFFSET_OF(T, i)));
@@ -199,7 +199,7 @@ TEST(3) {
   __ add(r0, r2, Operand(r0));
   __ mov(r2, Operand(r2, ASR, 3));
   __ strh(r2, MemOperand(r4, OFFSET_OF(T, s)));
-  __ ldm(ia, sp, r4.bit() | fp.bit() | sp.bit() | pc.bit());
+  __ ldm(ia_w, sp, r4.bit() | fp.bit() | pc.bit());
 
   CodeDesc desc;
   assm.GetCode(&desc);
diff --git a/deps/v8/test/cctest/test-heap.cc b/deps/v8/test/cctest/test-heap.cc
index 37dbdd7c6..eb32b6539 100644
--- a/deps/v8/test/cctest/test-heap.cc
+++ b/deps/v8/test/cctest/test-heap.cc
@@ -179,7 +179,7 @@ TEST(HeapObjects) {
 TEST(Tagging) {
   InitializeVM();
   int request = 24;
-  ASSERT_EQ(request, OBJECT_SIZE_ALIGN(request));
+  CHECK_EQ(request, static_cast<int>(OBJECT_SIZE_ALIGN(request)));
   CHECK(Smi::FromInt(42)->IsSmi());
   CHECK(Failure::RetryAfterGC(request, NEW_SPACE)->IsFailure());
   CHECK_EQ(request, Failure::RetryAfterGC(request, NEW_SPACE)->requested());
diff --git a/deps/v8/test/cctest/test-log-stack-tracer.cc b/deps/v8/test/cctest/test-log-stack-tracer.cc
index 1ef0a93d9..43df6ba7a 100644
--- a/deps/v8/test/cctest/test-log-stack-tracer.cc
+++ b/deps/v8/test/cctest/test-log-stack-tracer.cc
@@ -336,8 +336,10 @@ static void CFuncDoTrace() {
 #elif defined _MSC_VER && defined V8_TARGET_ARCH_IA32
   __asm mov [fp], ebp  // NOLINT
 #elif defined _MSC_VER && defined V8_TARGET_ARCH_X64
-  // FIXME: I haven't really tried to compile it.
-  __asm movq [fp], rbp  // NOLINT
+  // TODO(X64): __asm extension is not supported by the Microsoft Visual C++
+  // 64-bit compiler.
+  fp = 0;
+  UNIMPLEMENTED();
 #endif
   DoTrace(fp);
 }
diff --git a/deps/v8/test/cctest/test-regexp.cc b/deps/v8/test/cctest/test-regexp.cc
index 89c7868d8..81c220520 100644
--- a/deps/v8/test/cctest/test-regexp.cc
+++ b/deps/v8/test/cctest/test-regexp.cc
@@ -40,6 +40,7 @@
 #include "regexp-macro-assembler-irregexp.h"
 #ifdef V8_NATIVE_REGEXP
 #ifdef V8_TARGET_ARCH_ARM
+#include "arm/macro-assembler-arm.h"
 #include "arm/regexp-macro-assembler-arm.h"
 #endif
 #ifdef V8_TARGET_ARCH_X64
@@ -605,11 +606,12 @@ TEST(DispatchTableConstruction) {
 
 #ifdef V8_NATIVE_REGEXP
 
-#ifdef V8_TARGET_ARCH_IA32
+#if V8_TARGET_ARCH_IA32
 typedef RegExpMacroAssemblerIA32 ArchRegExpMacroAssembler;
-#endif
-#ifdef V8_TARGET_ARCH_X64
+#elif V8_TARGET_ARCH_X64
 typedef RegExpMacroAssemblerX64 ArchRegExpMacroAssembler;
+#elif V8_TARGET_ARCH_ARM
+typedef RegExpMacroAssemblerARM ArchRegExpMacroAssembler;
 #endif
 
 class ContextInitializer {
@@ -845,7 +847,7 @@ TEST(MacroAssemblerNativeBackReferenceASCII) {
   v8::V8::Initialize();
   ContextInitializer initializer;
 
-  ArchRegExpMacroAssembler m(NativeRegExpMacroAssembler::ASCII, 3);
+  ArchRegExpMacroAssembler m(NativeRegExpMacroAssembler::ASCII, 4);
 
   m.WriteCurrentPositionToRegister(0, 0);
   m.AdvanceCurrentPosition(2);
@@ -870,7 +872,7 @@ TEST(MacroAssemblerNativeBackReferenceASCII) {
   Handle<SeqAsciiString> seq_input = Handle<SeqAsciiString>::cast(input);
   Address start_adr = seq_input->GetCharsAddress();
 
-  int output[3];
+  int output[4];
   NativeRegExpMacroAssembler::Result result =
       Execute(*code,
               *input,
@@ -884,6 +886,7 @@ TEST(MacroAssemblerNativeBackReferenceASCII) {
   CHECK_EQ(0, output[0]);
   CHECK_EQ(2, output[1]);
   CHECK_EQ(6, output[2]);
+  CHECK_EQ(-1, output[3]);
 }
 
 
@@ -891,7 +894,7 @@ TEST(MacroAssemblerNativeBackReferenceUC16) {
   v8::V8::Initialize();
   ContextInitializer initializer;
 
-  ArchRegExpMacroAssembler m(NativeRegExpMacroAssembler::UC16, 3);
+  ArchRegExpMacroAssembler m(NativeRegExpMacroAssembler::UC16, 4);
 
   m.WriteCurrentPositionToRegister(0, 0);
   m.AdvanceCurrentPosition(2);
@@ -918,7 +921,7 @@ TEST(MacroAssemblerNativeBackReferenceUC16) {
   Handle<SeqTwoByteString> seq_input = Handle<SeqTwoByteString>::cast(input);
   Address start_adr = seq_input->GetCharsAddress();
 
-  int output[3];
+  int output[4];
   NativeRegExpMacroAssembler::Result result =
       Execute(*code,
                   *input,
@@ -932,6 +935,7 @@ TEST(MacroAssemblerNativeBackReferenceUC16) {
   CHECK_EQ(0, output[0]);
   CHECK_EQ(2, output[1]);
   CHECK_EQ(6, output[2]);
+  CHECK_EQ(-1, output[3]);
 }
 
 
@@ -1055,12 +1059,12 @@ TEST(MacroAssemblerNativeRegisters) {
   v8::V8::Initialize();
   ContextInitializer initializer;
 
-  ArchRegExpMacroAssembler m(NativeRegExpMacroAssembler::ASCII, 5);
+  ArchRegExpMacroAssembler m(NativeRegExpMacroAssembler::ASCII, 6);
 
   uc16 foo_chars[3] = {'f', 'o', 'o'};
   Vector<const uc16> foo(foo_chars, 3);
 
-  enum registers { out1, out2, out3, out4, out5, sp, loop_cnt };
+  enum registers { out1, out2, out3, out4, out5, out6, sp, loop_cnt };
   Label fail;
   Label backtrack;
   m.WriteCurrentPositionToRegister(out1, 0);  // Output: [0]
@@ -1114,7 +1118,7 @@ TEST(MacroAssemblerNativeRegisters) {
   m.GoTo(&loop3);
   m.Bind(&exit_loop3);
   m.PopCurrentPosition();
-  m.WriteCurrentPositionToRegister(out5, 0);  // [0,3,6,9,9]
+  m.WriteCurrentPositionToRegister(out5, 0);  // [0,3,6,9,9,-1]
 
   m.Succeed();
 
@@ -1132,15 +1136,15 @@ TEST(MacroAssemblerNativeRegisters) {
   Handle<SeqAsciiString> seq_input = Handle<SeqAsciiString>::cast(input);
   Address start_adr = seq_input->GetCharsAddress();
 
-  int output[5];
+  int output[6];
   NativeRegExpMacroAssembler::Result result =
       Execute(*code,
-                  *input,
-                  0,
-                  start_adr,
-                  start_adr + input->length(),
-                  output,
-                  true);
+              *input,
+              0,
+              start_adr,
+              start_adr + input->length(),
+              output,
+              true);
 
   CHECK_EQ(NativeRegExpMacroAssembler::SUCCESS, result);
   CHECK_EQ(0, output[0]);
@@ -1148,6 +1152,7 @@ TEST(MacroAssemblerNativeRegisters) {
   CHECK_EQ(6, output[2]);
   CHECK_EQ(9, output[3]);
   CHECK_EQ(9, output[4]);
+  CHECK_EQ(-1, output[5]);
 }
 
 
diff --git a/deps/v8/test/cctest/test-thread-termination.cc b/deps/v8/test/cctest/test-thread-termination.cc
index 323be1d77..552f49df1 100644
--- a/deps/v8/test/cctest/test-thread-termination.cc
+++ b/deps/v8/test/cctest/test-thread-termination.cc
@@ -193,3 +193,63 @@ TEST(TerminateMultipleV8Threads) {
   delete semaphore;
   semaphore = NULL;
 }
+
+
+int call_count = 0;
+
+
+v8::Handle<v8::Value> TerminateOrReturnObject(const v8::Arguments& args) {
+  if (++call_count == 10) {
+    v8::V8::TerminateExecution();
+    return v8::Undefined();
+  }
+  v8::Local<v8::Object> result = v8::Object::New();
+  result->Set(v8::String::New("x"), v8::Integer::New(42));
+  return result;
+}
+
+
+v8::Handle<v8::Value> LoopGetProperty(const v8::Arguments& args) {
+  v8::TryCatch try_catch;
+  v8::Script::Compile(v8::String::New("function f() {"
+                                      "  try {"
+                                      "    while(true) {"
+                                      "      terminate_or_return_object().x;"
+                                      "    }"
+                                      "    fail();"
+                                      "  } catch(e) {"
+                                      "    fail();"
+                                      "  }"
+                                      "}"
+                                      "f()"))->Run();
+  CHECK(try_catch.HasCaught());
+  CHECK(try_catch.Exception()->IsNull());
+  CHECK(try_catch.Message().IsEmpty());
+  CHECK(!try_catch.CanContinue());
+  return v8::Undefined();
+}
+
+
+// Test that we correctly handle termination exceptions if they are
+// triggered by the creation of error objects in connection with ICs.
+TEST(TerminateLoadICException) {
+  v8::HandleScope scope;
+  v8::Handle<v8::ObjectTemplate> global = v8::ObjectTemplate::New();
+  global->Set(v8::String::New("terminate_or_return_object"),
+              v8::FunctionTemplate::New(TerminateOrReturnObject));
+  global->Set(v8::String::New("fail"), v8::FunctionTemplate::New(Fail));
+  global->Set(v8::String::New("loop"),
+              v8::FunctionTemplate::New(LoopGetProperty));
+
+  v8::Persistent<v8::Context> context = v8::Context::New(NULL, global);
+  v8::Context::Scope context_scope(context);
+  // Run a loop that will be infinite if thread termination does not work.
+  v8::Handle<v8::String> source =
+      v8::String::New("try { loop(); fail(); } catch(e) { fail(); }");
+  call_count = 0;
+  v8::Script::Compile(source)->Run();
+  // Test that we can run the code again after thread termination.
+  call_count = 0;
+  v8::Script::Compile(source)->Run();
+  context.Dispose();
+}
diff --git a/deps/v8/test/cctest/test-utils.cc b/deps/v8/test/cctest/test-utils.cc
index 23b3254c2..ffcaf8abc 100644
--- a/deps/v8/test/cctest/test-utils.cc
+++ b/deps/v8/test/cctest/test-utils.cc
@@ -158,7 +158,7 @@ TEST(Utils1) {
   // int8_t and intptr_t signed integers.
   CHECK_EQ(-2, -8 >> 2);
   CHECK_EQ(-2, static_cast<int8_t>(-8) >> 2);
-  CHECK_EQ(-2, static_cast<intptr_t>(-8) >> 2);
+  CHECK_EQ(-2, static_cast<int>(static_cast<intptr_t>(-8) >> 2));
 }
 
 
diff --git a/deps/v8/test/mjsunit/debug-stepin-constructor.js b/deps/v8/test/mjsunit/debug-stepin-constructor.js
index 6dbe5d192..6ee334735 100644
--- a/deps/v8/test/mjsunit/debug-stepin-constructor.js
+++ b/deps/v8/test/mjsunit/debug-stepin-constructor.js
@@ -59,6 +59,10 @@ function f() {
 break_break_point_hit_count = 0;
 f();
 assertEquals(5, break_break_point_hit_count);
+f();
+assertEquals(10, break_break_point_hit_count);
+f();
+assertEquals(15, break_break_point_hit_count);
 
 // Test step into constructor with builtin constructor.
 function g() {
diff --git a/deps/v8/test/mjsunit/simple-constructor.js b/deps/v8/test/mjsunit/simple-constructor.js
index b26d6519b..e9ae92100 100755
--- a/deps/v8/test/mjsunit/simple-constructor.js
+++ b/deps/v8/test/mjsunit/simple-constructor.js
@@ -53,9 +53,11 @@ function f4(x) {
 }
 
 o1_1 = new f1();
+assertEquals(1, o1_1.x, "1");
 o1_2 = new f1();
-assertArrayEquals(["x"], props(o1_1));
-assertArrayEquals(["x"], props(o1_2));
+assertEquals(1, o1_1.x, "2");
+assertArrayEquals(["x"], props(o1_1), "3");
+assertArrayEquals(["x"], props(o1_2), "4");
 
 o2_1 = new f2(0);
 o2_2 = new f2(0);
@@ -76,3 +78,63 @@ o4_1_1 = new f4(1);
 o4_1_2 = new f4(1);
 assertArrayEquals(["x", "y"], props(o4_1_1));
 assertArrayEquals(["x", "y"], props(o4_1_2));
+
+function f5(x, y) {
+  this.x = x;
+  this.y = y;
+}
+
+function f6(x, y) {
+  this.y = y;
+  this.x = x;
+}
+
+function f7(x, y, z) {
+  this.x = x;
+  this.y = y;
+}
+
+function testArgs(fun) {
+  obj = new fun();
+  assertArrayEquals(["x", "y"], props(obj));
+  assertEquals(void 0, obj.x);
+  assertEquals(void 0, obj.y);
+
+  obj = new fun("x");
+  assertArrayEquals(["x", "y"], props(obj));
+  assertEquals("x", obj.x);
+  assertEquals(void 0, obj.y);
+
+  obj = new fun("x", "y");
+  assertArrayEquals(["x", "y"], props(obj));
+  assertEquals("x", obj.x);
+  assertEquals("y", obj.y);
+
+  obj = new fun("x", "y", "z");
+  assertArrayEquals(["x", "y"], props(obj));
+  assertEquals("x", obj.x);
+  assertEquals("y", obj.y);
+}
+
+for (var i = 0; i < 10; i++) {
+  testArgs(f5);
+  testArgs(f6);
+  testArgs(f7);
+}
+
+function g(){
+  this.x=1
+}
+
+o = new g();
+assertEquals(1, o.x);
+o = new g();
+assertEquals(1, o.x);
+g.prototype = {y:2}
+o = new g();
+assertEquals(1, o.x);
+assertEquals(2, o.y);
+o = new g();
+assertEquals(1, o.x);
+assertEquals(2, o.y);
+
diff --git a/deps/v8/test/mjsunit/transcendentals.js b/deps/v8/test/mjsunit/transcendentals.js
new file mode 100644
index 000000000..78e6c4807
--- /dev/null
+++ b/deps/v8/test/mjsunit/transcendentals.js
@@ -0,0 +1,49 @@
+// Copyright 2009 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+
+// Two fp numbers that have the same hash value (see TranscendentalCache
+// in heap.h).
+var x = 0x123456789ABCD / 0x2000000000000;
+var y = 0x1134567899BCD / 0x2000000000000;
+
+assertTrue(Math.sin(x) != Math.sin(y));
+
+assertTrue(Math.cos(x) != Math.cos(y));
+
+assertTrue(Math.tan(x) != Math.tan(y));
+
+assertTrue(Math.log(x) != Math.log(y));
+
+assertTrue(Math.asin(x) != Math.asin(y));
+
+assertTrue(Math.acos(x) != Math.acos(y));
+
+assertTrue(Math.atan(x) != Math.atan(y));
+
+assertTrue(Math.exp(x) != Math.exp(y));
+
diff --git a/deps/v8/tools/gyp/v8.gyp b/deps/v8/tools/gyp/v8.gyp
index c57419879..1222ea9c9 100644
--- a/deps/v8/tools/gyp/v8.gyp
+++ b/deps/v8/tools/gyp/v8.gyp
@@ -66,6 +66,7 @@
           'DEBUG',
           '_DEBUG',
           'ENABLE_DISASSEMBLER',
+          'V8_ENABLE_CHECKS'
         ],
         'msvs_settings': {
           'VCCLCompilerTool': {
@@ -432,18 +433,14 @@
             '../../src/ia32/jump-target-ia32.cc',
             '../../src/ia32/macro-assembler-ia32.cc',
             '../../src/ia32/macro-assembler-ia32.h',
+            '../../src/ia32/regexp-macro-assembler-ia32.cc',
+            '../../src/ia32/regexp-macro-assembler-ia32.h',
             '../../src/ia32/register-allocator-ia32.cc',
             '../../src/ia32/stub-cache-ia32.cc',
             '../../src/ia32/virtual-frame-ia32.cc',
             '../../src/ia32/virtual-frame-ia32.h',
           ],
         }],
-        ['target_arch=="ia32" and v8_regexp=="native"', {
-          'sources': [
-            '../../src/ia32/regexp-macro-assembler-ia32.cc',
-            '../../src/ia32/regexp-macro-assembler-ia32.h',
-          ],
-        }],
         ['target_arch=="x64"', {
           'include_dirs+': [
             '../../src/x64',
@@ -465,18 +462,14 @@
             '../../src/x64/jump-target-x64.cc',
             '../../src/x64/macro-assembler-x64.cc',
             '../../src/x64/macro-assembler-x64.h',
+            '../../src/x64/regexp-macro-assembler-x64.cc',
+            '../../src/x64/regexp-macro-assembler-x64.h',
             '../../src/x64/register-allocator-x64.cc',
             '../../src/x64/stub-cache-x64.cc',
             '../../src/x64/virtual-frame-x64.cc',
             '../../src/x64/virtual-frame-x64.h',
           ],
         }],
-        ['target_arch=="x64" and v8_regexp=="native"', {
-          'sources': [
-            '../../src/x64/regexp-macro-assembler-x64.cc',
-            '../../src/x64/regexp-macro-assembler-x64.h',
-          ],
-        }],
         ['OS=="linux"', {
             'link_settings': {
               'libraries': [
diff --git a/deps/v8/tools/js2c.py b/deps/v8/tools/js2c.py
index 52fe35c9c..cae39e897 100755
--- a/deps/v8/tools/js2c.py
+++ b/deps/v8/tools/js2c.py
@@ -45,6 +45,13 @@ def ToCArray(lines):
   return ", ".join(result)
 
 
+def RemoveCommentsAndTrailingWhitespace(lines):
+  lines = re.sub(r'//.*\n', '\n', lines) # end-of-line comments
+  lines = re.sub(re.compile(r'/\*.*?\*/', re.DOTALL), '', lines) # comments.
+  lines = re.sub(r'\s+\n+', '\n', lines) # trailing whitespace
+  return lines
+
+
 def CompressScript(lines, do_jsmin):
   # If we're not expecting this code to be user visible, we can run it through
   # a more aggressive minifier.
@@ -55,9 +62,7 @@ def CompressScript(lines, do_jsmin):
   # people print the source code using Function.prototype.toString().
   # Note that we could easily compress the scripts mode but don't
   # since we want it to remain readable.
-  lines = re.sub('//.*\n', '\n', lines) # end-of-line comments
-  lines = re.sub(re.compile(r'/\*.*?\*/', re.DOTALL), '', lines) # comments.
-  lines = re.sub('\s+\n+', '\n', lines) # trailing whitespace
+  lines = RemoveCommentsAndTrailingWhitespace(lines)
   return lines
 
 
@@ -96,6 +101,22 @@ def ParseValue(string):
     return string
 
 
+EVAL_PATTERN = re.compile(r'\beval\s*\(');
+WITH_PATTERN = re.compile(r'\bwith\s*\(');
+
+
+def Validate(lines, file):
+  lines = RemoveCommentsAndTrailingWhitespace(lines)
+  # Because of simplified context setup, eval and with is not
+  # allowed in the natives files.
+  eval_match = EVAL_PATTERN.search(lines)
+  if eval_match:
+    raise ("Eval disallowed in natives: %s" % file)
+  with_match = WITH_PATTERN.search(lines)
+  if with_match:
+    raise ("With statements disallowed in natives: %s" % file)
+
+
 def ExpandConstants(lines, constants):
   for key, value in constants.items():
     lines = lines.replace(key, str(value))
@@ -155,9 +176,9 @@ class PythonMacro:
       args.append(mapping[arg])
     return str(self.fun(*args))
 
-CONST_PATTERN = re.compile('^const\s+([a-zA-Z0-9_]+)\s*=\s*([^;]*);$')
-MACRO_PATTERN = re.compile('^macro\s+([a-zA-Z0-9_]+)\s*\(([^)]*)\)\s*=\s*([^;]*);$')
-PYTHON_MACRO_PATTERN = re.compile('^python\s+macro\s+([a-zA-Z0-9_]+)\s*\(([^)]*)\)\s*=\s*([^;]*);$')
+CONST_PATTERN = re.compile(r'^const\s+([a-zA-Z0-9_]+)\s*=\s*([^;]*);$')
+MACRO_PATTERN = re.compile(r'^macro\s+([a-zA-Z0-9_]+)\s*\(([^)]*)\)\s*=\s*([^;]*);$')
+PYTHON_MACRO_PATTERN = re.compile(r'^python\s+macro\s+([a-zA-Z0-9_]+)\s*\(([^)]*)\)\s*=\s*([^;]*);$')
 
 def ReadMacros(lines):
   constants = { }
@@ -275,15 +296,17 @@ def JS2C(source, target, env):
   # Build source code lines
   source_lines = [ ]
   source_lines_empty = []
-  for s in modules:
-    delay = str(s).endswith('-delay.js')
-    lines = ReadFile(str(s))
+  for module in modules:
+    filename = str(module)
+    delay = filename.endswith('-delay.js')
+    lines = ReadFile(filename)
     do_jsmin = lines.find('// jsminify this file, js2c: jsmin') != -1
     lines = ExpandConstants(lines, consts)
     lines = ExpandMacros(lines, macros)
+    Validate(lines, filename)
     lines = CompressScript(lines, do_jsmin)
     data = ToCArray(lines)
-    id = (os.path.split(str(s))[1])[:-3]
+    id = (os.path.split(filename)[1])[:-3]
     if delay: id = id[:-6]
     if delay:
       delay_ids.append((id, len(lines)))
@@ -291,7 +314,7 @@ def JS2C(source, target, env):
       ids.append((id, len(lines)))
     source_lines.append(SOURCE_DECLARATION % { 'id': id, 'data': data })
     source_lines_empty.append(SOURCE_DECLARATION % { 'id': id, 'data': 0 })
-  
+
   # Build delay support functions
   get_index_cases = [ ]
   get_script_source_cases = [ ]
diff --git a/deps/v8/tools/v8.xcodeproj/project.pbxproj b/deps/v8/tools/v8.xcodeproj/project.pbxproj
index 45e63612e..f9241f99e 100644
--- a/deps/v8/tools/v8.xcodeproj/project.pbxproj
+++ b/deps/v8/tools/v8.xcodeproj/project.pbxproj
@@ -1394,6 +1394,7 @@
 				GCC_PREPROCESSOR_DEFINITIONS = (
 					"$(GCC_PREPROCESSOR_DEFINITIONS)",
 					DEBUG,
+					V8_ENABLE_CHECKS,
 				);
 				GCC_SYMBOLS_PRIVATE_EXTERN = YES;
 				GCC_TREAT_WARNINGS_AS_ERRORS = YES;
@@ -1457,6 +1458,7 @@
 					V8_TARGET_ARCH_IA32,
 					V8_NATIVE_REGEXP,
 					DEBUG,
+					V8_ENABLE_CHECKS,
 				);
 				HEADER_SEARCH_PATHS = ../src;
 				PRODUCT_NAME = v8_shell;
diff --git a/deps/v8/tools/visual_studio/debug.vsprops b/deps/v8/tools/visual_studio/debug.vsprops
index 0abf92447..5e3555a9d 100644
--- a/deps/v8/tools/visual_studio/debug.vsprops
+++ b/deps/v8/tools/visual_studio/debug.vsprops
@@ -7,7 +7,7 @@
 	<Tool
 		Name="VCCLCompilerTool"
 		Optimization="0"
-		PreprocessorDefinitions="DEBUG;_DEBUG;ENABLE_DISASSEMBLER"
+		PreprocessorDefinitions="DEBUG;_DEBUG;ENABLE_DISASSEMBLER;V8_ENABLE_CHECKS"
 		RuntimeLibrary="1"
 	/>
 	<Tool