Replace store array length builtin with codestub.

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 32 matching lines @@
   V(BinaryOp)                            \
   V(StringAdd)                           \
   V(SubString)                           \
   V(StringCompare)                       \
   V(Compare)                             \
   V(CompareIC)                           \
   V(MathPow)                             \
   V(ArrayLength)                         \
   V(StringLength)                        \
   V(FunctionPrototype)                   \
+  V(StoreArrayLength)                    \
   V(RecordWrite)                         \
   V(StoreBufferOverflow)                 \
   V(RegExpExec)                          \
   V(TranscendentalCache)                 \
   V(Instanceof)                          \
   V(ConvertToDouble)                     \
   V(WriteInt32ToHeapNumber)              \
   V(StackCheck)                          \
   V(Interrupt)                           \
   V(FastNewClosure)                      \
@@ skipping 109 matching lines @@
  protected:
   static bool CanUseFPRegisters();
 
   // Generates the assembler code for the stub.
   virtual Handle<Code> GenerateCode() = 0;
 
   // BinaryOpStub needs to override this.
   virtual InlineCacheState GetICState() {
     return UNINITIALIZED;
   }
+  virtual Code::ExtraICState GetExtraICState() {
+    return Code::kNoExtraICState;
+  }
 
   // Returns whether the code generated for this stub needs to be allocated as
   // a fixed (non-moveable) code object.
   virtual bool NeedsImmovableCode() { return false; }
 
  private:
   // Perform bookkeeping required after code generation when stub code is
   // initially generated.
   void RecordCodeGeneration(Code* code, Isolate* isolate);
 
@@ skipping 406 matching lines @@
   class WrapperModeBits: public BitField<bool, 4, 1> {};
   virtual CodeStub::Major MajorKey() { return StringLength; }
   virtual int MinorKey() {
     return KindBits::encode(kind()) | WrapperModeBits::encode(support_wrapper_);
   }
 
   bool support_wrapper_;
 };
 
 
+class StoreICStub: public ICStub {
+ public:
+  StoreICStub(Code::Kind kind, StrictModeFlag strict_mode)
+      : ICStub(kind), strict_mode_(strict_mode) { }
+
+ protected:
+  virtual Code::ExtraICState GetExtraICState() {
+    return strict_mode_;
+  }
+
+ private:
+  class StrictModeBits: public BitField<bool, 4, 1> {};
+  virtual int MinorKey() {
+    return KindBits::encode(kind()) | StrictModeBits::encode(strict_mode_);
+  }
+
+  StrictModeFlag strict_mode_;
+};
+
+
+class StoreArrayLengthStub: public StoreICStub {
+ public:
+  explicit StoreArrayLengthStub(Code::Kind kind, StrictModeFlag strict_mode)
+      : StoreICStub(kind, strict_mode) { }
+  virtual void Generate(MacroAssembler* masm);
+
+ private:
+  virtual CodeStub::Major MajorKey() { return StoreArrayLength; }
+};
+
+
 class BinaryOpStub: public PlatformCodeStub {
  public:
   BinaryOpStub(Token::Value op, OverwriteMode mode)
       : op_(op),
         mode_(mode),
         platform_specific_bit_(false),
         left_type_(BinaryOpIC::UNINITIALIZED),
         right_type_(BinaryOpIC::UNINITIALIZED),
         result_type_(BinaryOpIC::UNINITIALIZED) {
     Initialize();
@@ skipping 760 matching lines @@
 
   // The current function entry hook.
   static FunctionEntryHook entry_hook_;
 
   DISALLOW_COPY_AND_ASSIGN(ProfileEntryHookStub);
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_CODE_STUBS_H_