Replace special IC builtins and stubs in the map's cache by codestubs.

src/ic.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 115 matching lines @@
   // Determines which map must be used for keeping the code stub.
   // These methods should not be called with undefined or null.
   static inline InlineCacheHolderFlag GetCodeCacheForObject(Object* object,
                                                             JSObject* holder);
   static inline InlineCacheHolderFlag GetCodeCacheForObject(JSObject* object,
                                                             JSObject* holder);
   static inline JSObject* GetCodeCacheHolder(Object* object,
                                              InlineCacheHolderFlag holder);
 
  protected:
+  virtual Handle<Code> pre_monomorphic_stub() {
+    UNREACHABLE();
+    return Handle<Code>::null();
+  }
+  virtual Handle<Code> megamorphic_stub() {
+    UNREACHABLE();
+    return Handle<Code>::null();
+  }
+  virtual Code::Kind kind() const {
+    UNREACHABLE();
+    return Code::STUB;
+  }
   Address fp() const { return fp_; }
   Address pc() const { return *pc_address_; }
   Isolate* isolate() const { return isolate_; }
 
 #ifdef ENABLE_DEBUGGER_SUPPORT
   // Computes the address in the original code when the code running is
   // containing break points (calls to DebugBreakXXX builtins).
   Address OriginalCodeAddress() const;
 #endif
 
@@ skipping 12 matching lines @@
   Failure* TypeError(const char* type,
                      Handle<Object> object,
                      Handle<Object> key);
   Failure* ReferenceError(const char* type, Handle<String> name);
 
   // Access the target code for the given IC address.
   static inline Code* GetTargetAtAddress(Address address);
   static inline void SetTargetAtAddress(Address address, Code* target);
   static void PostPatching(Address address, Code* target, Code* old_target);
 
+  bool HandleLoad(State state,
+                  Handle<Object> object,
+                  Handle<String> name,
+                  MaybeObject** result);
+
  private:
   // Frame pointer for the frame that uses (calls) the IC.
   Address fp_;
 
   // All access to the program counter of an IC structure is indirect
   // to make the code GC safe. This feature is crucial since
   // GetProperty and SetProperty are called and they in turn might
   // invoke the garbage collector.
   Address* pc_address_;
 
@@ skipping 153 matching lines @@
   static void GenerateInitialize(MacroAssembler* masm) { GenerateMiss(masm); }
   static void GeneratePreMonomorphic(MacroAssembler* masm) {
     GenerateMiss(masm);
   }
   static void GenerateMiss(MacroAssembler* masm);
   static void GenerateMegamorphic(MacroAssembler* masm);
   static void GenerateNormal(MacroAssembler* masm);
 
   // Specialized code generator routines.
   static void GenerateArrayLength(MacroAssembler* masm);
-  static void GenerateStringLength(MacroAssembler* masm,
-                                   bool support_wrappers);
   static void GenerateFunctionPrototype(MacroAssembler* masm);
 
+ protected:
+  virtual Code::Kind kind() const { return Code::LOAD_IC; }
+
+  virtual Handle<Code> megamorphic_stub() {
+    return isolate()->builtins()->LoadIC_Megamorphic();
+  }
+
  private:
   // Update the inline cache and the global stub cache based on the
   // lookup result.
   void UpdateCaches(LookupResult* lookup,
                     State state,
                     Handle<Object> object,
                     Handle<String> name);
 
   // Stub accessors.
-  Handle<Code> megamorphic_stub() {
-    return isolate()->builtins()->LoadIC_Megamorphic();
-  }
   static Code* initialize_stub() {
     return Isolate::Current()->builtins()->builtin(
         Builtins::kLoadIC_Initialize);
   }
-  Handle<Code> pre_monomorphic_stub() {
+  virtual Handle<Code> pre_monomorphic_stub() {
     return isolate()->builtins()->LoadIC_PreMonomorphic();
   }
 
   static void Clear(Address address, Code* target);
 
   friend class IC;
 };
 
 
 class KeyedIC: public IC {
@@ skipping 50 matching lines @@
   virtual Handle<Code> GetElementStubWithoutMapCheck(
       bool is_js_array,
       ElementsKind elements_kind,
       KeyedAccessGrowMode grow_mode) = 0;
 
  protected:
   virtual Handle<Code> string_stub() {
     return Handle<Code>::null();
   }
 
-  virtual Code::Kind kind() const = 0;
-
   Handle<Code> ComputeStub(Handle<JSObject> receiver,
                            StubKind stub_kind,
                            StrictModeFlag strict_mode,
                            Handle<Code> default_stub);
 
   virtual Handle<Code> ComputePolymorphicStub(
       MapHandleList* receiver_maps,
       StrictModeFlag strict_mode,
       KeyedAccessGrowMode grow_mode) = 0;
 
@@ skipping 69 matching lines @@
       (1 << Map::kIsAccessCheckNeeded) | (1 << Map::kHasIndexedInterceptor);
 
   virtual Handle<Code> GetElementStubWithoutMapCheck(
       bool is_js_array,
       ElementsKind elements_kind,
       KeyedAccessGrowMode grow_mode);
 
  protected:
   virtual Code::Kind kind() const { return Code::KEYED_LOAD_IC; }
 
+  virtual Handle<Code> megamorphic_stub() {
+    return isolate()->builtins()->KeyedLoadIC_Generic();
+  }
+
   virtual Handle<Code> ComputePolymorphicStub(MapHandleList* receiver_maps,
                                               StrictModeFlag strict_mode,
                                               KeyedAccessGrowMode grow_mode);
 
   virtual Handle<Code> string_stub() {
     return isolate()->builtins()->KeyedLoadIC_String();
   }
 
  private:
   // Update the inline cache.
   void UpdateCaches(LookupResult* lookup,
                     State state,
                     Handle<Object> object,
                     Handle<String> name);
 
   // Stub accessors.
   static Code* initialize_stub() {
     return Isolate::Current()->builtins()->builtin(
         Builtins::kKeyedLoadIC_Initialize);
   }
-  Handle<Code> megamorphic_stub() {
-    return isolate()->builtins()->KeyedLoadIC_Generic();
-  }
   Handle<Code> generic_stub() const {
     return isolate()->builtins()->KeyedLoadIC_Generic();
   }
-  Handle<Code> pre_monomorphic_stub() {
+  virtual Handle<Code> pre_monomorphic_stub() {
     return isolate()->builtins()->KeyedLoadIC_PreMonomorphic();
   }
   Handle<Code> indexed_interceptor_stub() {
     return isolate()->builtins()->KeyedLoadIC_IndexedInterceptor();
   }
   Handle<Code> non_strict_arguments_stub() {
     return isolate()->builtins()->KeyedLoadIC_NonStrictArguments();
   }
 
   static void Clear(Address address, Code* target);
@@ skipping 17 matching lines @@
   // 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,
                                   StrictModeFlag strict_mode);
   static void GenerateArrayLength(MacroAssembler* masm);
   static void GenerateNormal(MacroAssembler* masm);
   static void GenerateGlobalProxy(MacroAssembler* masm,
                                   StrictModeFlag strict_mode);
 
+ protected:
+  virtual Code::Kind kind() const { return Code::STORE_IC; }
+  virtual Handle<Code> megamorphic_stub() {
+    return isolate()->builtins()->StoreIC_Megamorphic();
+  }
+
  private:
   // Update the inline cache and the global stub cache based on the
   // lookup result.
   void UpdateCaches(LookupResult* lookup,
                     State state,
                     StrictModeFlag strict_mode,
                     Handle<JSObject> receiver,
                     Handle<String> name,
                     Handle<Object> value);
 
   void set_target(Code* code) {
     // Strict mode must be preserved across IC patching.
     ASSERT(Code::GetStrictMode(code->extra_ic_state()) ==
            Code::GetStrictMode(target()->extra_ic_state()));
     IC::set_target(code);
   }
 
   // Stub accessors.
-  Code* megamorphic_stub() {
-    return isolate()->builtins()->builtin(
-        Builtins::kStoreIC_Megamorphic);
-  }
   Code* megamorphic_stub_strict() {
     return isolate()->builtins()->builtin(
         Builtins::kStoreIC_Megamorphic_Strict);
   }
   static Code* initialize_stub() {
     return Isolate::Current()->builtins()->builtin(
         Builtins::kStoreIC_Initialize);
   }
   static Code* initialize_stub_strict() {
     return Isolate::Current()->builtins()->builtin(
@@ skipping 222 matching lines @@
 
 // Helper for BinaryOpIC and CompareIC.
 enum InlinedSmiCheck { ENABLE_INLINED_SMI_CHECK, DISABLE_INLINED_SMI_CHECK };
 void PatchInlinedSmiCode(Address address, InlinedSmiCheck check);
 
 DECLARE_RUNTIME_FUNCTION(MaybeObject*, KeyedLoadIC_Miss);
 
 } }  // namespace v8::internal
 
 #endif  // V8_IC_H_