Turn ArrayPush into a stub specialized on the elements kind and argc.

src/code-stubs.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 60 matching lines @@
   V(CreateAllocationSite)                \
   V(ToBoolean)                           \
   V(ToNumber)                            \
   V(ArgumentsAccess)                     \
   V(RegExpConstructResult)               \
   V(NumberToString)                      \
   V(DoubleToI)                           \
   V(CEntry)                              \
   V(JSEntry)                             \
   V(KeyedLoadElement)                    \
+  V(ArrayPush)                           \
   V(ArrayNoArgumentConstructor)          \
   V(ArraySingleArgumentConstructor)      \
   V(ArrayNArgumentsConstructor)          \
   V(InternalArrayNoArgumentConstructor)  \
   V(InternalArraySingleArgumentConstructor)      \
   V(InternalArrayNArgumentsConstructor)  \
   V(KeyedStoreElement)                   \
   V(DebuggerStatement)                   \
   V(NameDictionaryLookup)                \
   V(ElementsTransitionAndStore)          \
@@ skipping 1053 matching lines @@
  private:
   static void GenerateAheadOfTime(Isolate* isolate,
                                   const BinaryOpIC::State& state);
 
   BinaryOpIC::State state_;
 
   DISALLOW_COPY_AND_ASSIGN(BinaryOpICStub);
 };
 
 
+class ArrayPushStub: public PlatformCodeStub {
+ public:
+  ArrayPushStub(ElementsKind kind, int argc) {
+    bit_field_ = ElementsKindBits::encode(kind) | ArgcBits::encode(argc);
+  }
+
+  void Generate(MacroAssembler* masm);
+
+ private:
+  int arguments_count() { return ArgcBits::decode(bit_field_); }
+  ElementsKind elements_kind() {
+    return ElementsKindBits::decode(bit_field_);
+  }
+
+  virtual CodeStub::Major MajorKey() { return ArrayPush; }
+  virtual int MinorKey() { return bit_field_; }
+
+  class ElementsKindBits: public BitField<ElementsKind, 0, 3> {};
+  class ArgcBits: public BitField<int, 3, Code::kArgumentsBits> {};
+
+  int bit_field_;
+};
+
+
 // TODO(bmeurer): Merge this into the BinaryOpICStub once we have proper tail
 // call support for stubs in Hydrogen.
 class BinaryOpICWithAllocationSiteStub V8_FINAL : public PlatformCodeStub {
  public:
   explicit BinaryOpICWithAllocationSiteStub(const BinaryOpIC::State& state)
       : state_(state) {}
 
   static void GenerateAheadOfTime(Isolate* isolate);
 
   Handle<Code> GetCodeCopyFromTemplate(Isolate* isolate,
@@ skipping 1302 matching lines @@
 
 
 class CallDescriptors {
  public:
   static void InitializeForIsolate(Isolate* isolate);
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_CODE_STUBS_H_