Compile FastCloneShallowObjectStub using Crankshaft.

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 246 matching lines @@
         extra_expression_stack_count_(0),
         register_params_(NULL) { }
   int register_param_count_;
   const Register* stack_parameter_count_;
   int extra_expression_stack_count_;
   Register* register_params_;
   Address deoptimization_handler_;
 };
 
 
-class HGraph;
-struct Register;
 class HydrogenCodeStub : public CodeStub {
  public:
   // Retrieve the code for the stub. Generate the code if needed.
   virtual Handle<Code> GenerateCode() = 0;
 
   virtual int GetCodeKind() { return Code::COMPILED_STUB; }
 
   CodeStubInterfaceDescriptor* GetInterfaceDescriptor(Isolate* isolate) {
     return isolate->code_stub_interface_descriptor(MajorKey());
   }
@@ skipping 189 matching lines @@
   STATIC_ASSERT(kMaximumClonedLength < 16);
   Major MajorKey() { return FastCloneShallowArray; }
   int MinorKey() {
     return AllocationSiteModeBits::encode(allocation_site_mode_)
         | ModeBits::encode(mode_)
         | LengthBits::encode(length_);
   }
 };
 
 
-class FastCloneShallowObjectStub : public PlatformCodeStub {
+class FastCloneShallowObjectStub : public HydrogenCodeStub {
  public:
   // Maximum number of properties in copied object.
   static const int kMaximumClonedProperties = 6;
 
   explicit FastCloneShallowObjectStub(int length) : length_(length) {
     ASSERT_GE(length_, 0);
     ASSERT_LE(length_, kMaximumClonedProperties);
   }
 
-  void Generate(MacroAssembler* masm);
+  int length() const { return length_; }
+
+  virtual Handle<Code> GenerateCode();
+
+  virtual void InitializeInterfaceDescriptor(
+      Isolate* isolate,
+      CodeStubInterfaceDescriptor* descriptor);
 
  private:
   int length_;
 
   Major MajorKey() { return FastCloneShallowObject; }
   int MinorKey() { return length_; }
+
+  DISALLOW_COPY_AND_ASSIGN(FastCloneShallowObjectStub);
 };
 
 
 class InstanceofStub: public PlatformCodeStub {
  public:
   enum Flags {
     kNoFlags = 0,
     kArgsInRegisters = 1 << 0,
     kCallSiteInlineCheck = 1 << 1,
     kReturnTrueFalseObject = 1 << 2
@@ skipping 710 matching lines @@
 };
 
 
 class KeyedLoadFastElementStub : public HydrogenCodeStub {
  public:
   KeyedLoadFastElementStub(bool is_js_array, ElementsKind elements_kind) {
     bit_field_ = ElementsKindBits::encode(elements_kind) |
         IsJSArrayBits::encode(is_js_array);
   }
 
-  Major MajorKey() { return KeyedLoadElement; }
-  int MinorKey() { return bit_field_; }
-
   bool is_js_array() const {
     return IsJSArrayBits::decode(bit_field_);
   }
 
   ElementsKind elements_kind() const {
     return ElementsKindBits::decode(bit_field_);
   }
 
   virtual Handle<Code> GenerateCode();
 
   virtual void InitializeInterfaceDescriptor(
       Isolate* isolate,
       CodeStubInterfaceDescriptor* descriptor);
 
  private:
   class IsJSArrayBits: public BitField<bool, 8, 1> {};
   class ElementsKindBits: public BitField<ElementsKind, 0, 8> {};
   uint32_t bit_field_;
 
+  Major MajorKey() { return KeyedLoadElement; }
+  int MinorKey() { return bit_field_; }
+
   DISALLOW_COPY_AND_ASSIGN(KeyedLoadFastElementStub);
 };
 
 
 class TransitionElementsKindStub : public HydrogenCodeStub {
  public:
   TransitionElementsKindStub(ElementsKind from_kind,
                              ElementsKind to_kind) {
     bit_field_ = FromKindBits::encode(from_kind) |
         ToKindBits::encode(to_kind);
   }
 
-  Major MajorKey() { return TransitionElementsKind; }
-  int MinorKey() { return bit_field_; }
-
   ElementsKind from_kind() const {
     return FromKindBits::decode(bit_field_);
   }
 
   ElementsKind to_kind() const {
     return ToKindBits::decode(bit_field_);
   }
 
   virtual Handle<Code> GenerateCode();
 
   virtual void InitializeInterfaceDescriptor(
       Isolate* isolate,
       CodeStubInterfaceDescriptor* descriptor);
 
  private:
   class FromKindBits: public BitField<ElementsKind, 8, 8> {};
   class ToKindBits: public BitField<ElementsKind, 0, 8> {};
   uint32_t bit_field_;
 
+  Major MajorKey() { return TransitionElementsKind; }
+  int MinorKey() { return bit_field_; }
+
   DISALLOW_COPY_AND_ASSIGN(TransitionElementsKindStub);
 };
 
 
 class KeyedStoreElementStub : public PlatformCodeStub {
  public:
   KeyedStoreElementStub(bool is_js_array,
                         ElementsKind elements_kind,
                         KeyedAccessGrowMode grow_mode)
       : is_js_array_(is_js_array),
@@ skipping 207 matching lines @@
 
   // The current function entry hook.
   static FunctionEntryHook entry_hook_;
 
   DISALLOW_COPY_AND_ASSIGN(ProfileEntryHookStub);
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_CODE_STUBS_H_