Inline in-object property stores when in loop and not in top-level

src/ic.h

 // Copyright 2006-2009 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
@@ skipping 373 matching lines @@
                 Handle<String> name,
                 Handle<Object> value);
 
   // Code generators for stub routines. Only called once at startup.
   static void GenerateInitialize(MacroAssembler* masm) { GenerateMiss(masm); }
   static void GenerateMiss(MacroAssembler* masm);
   static void GenerateMegamorphic(MacroAssembler* masm);
   static void GenerateArrayLength(MacroAssembler* masm);
   static void GenerateNormal(MacroAssembler* masm);
 
+  // Clear the use of an inlined version.
+  static void ClearInlinedVersion(Address address);
+
+  // The offset from the inlined patch site to the start of the
+  // inlined store instruction.
+  static const int kOffsetToStoreInstruction;
+
  private:
   // Update the inline cache and the global stub cache based on the
   // lookup result.
   void UpdateCaches(LookupResult* lookup,
                     State state, Handle<JSObject> receiver,
                     Handle<String> name,
                     Handle<Object> value);
 
   // Stub accessors.
   static Code* megamorphic_stub() {
     return Builtins::builtin(Builtins::StoreIC_Megamorphic);
   }
   static Code* initialize_stub() {
     return Builtins::builtin(Builtins::StoreIC_Initialize);
   }
 
   static void Clear(Address address, Code* target);
+
+  // Support for patching the index and the map that is checked in an
+  // inlined version of the named store.
+  static bool PatchInlinedStore(Address address, Object* map, int index);
+
   friend class IC;
 };
 
 
 class KeyedStoreIC: public IC {
  public:
   KeyedStoreIC() : IC(NO_EXTRA_FRAME) { }
 
   Object* Store(State state,
                 Handle<Object> object,
@@ skipping 73 matching lines @@
   static const char* GetName(TypeInfo type_info);
 
   static State ToState(TypeInfo type_info);
 
   static TypeInfo GetTypeInfo(Object* left, Object* right);
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_IC_H_