Separate MEGAMORPHIC and GENERIC ic states

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 79 matching lines @@
 
   // Construct the IC structure with the given number of extra
   // JavaScript frames on the stack.
   IC(FrameDepth depth, Isolate* isolate);
   virtual ~IC() {}
 
   // Get the call-site target; used for determining the state.
   Code* target() const { return GetTargetAtAddress(address()); }
   inline Address address() const;
 
-  virtual bool IsGeneric() const { return false; }
-
   // Compute the current IC state based on the target stub, receiver and name.
   static State StateFrom(Code* target, Object* receiver, Object* name);
 
   // Clear the inline cache to initial state.
   static void Clear(Address address);
 
   // Computes the reloc info for this IC. This is a fairly expensive
   // operation as it has to search through the heap to find the code
   // object that contains this IC site.
   RelocInfo::Mode ComputeMode();
@@ skipping 400 matching lines @@
   // Access check is necessary explicitly since generic stub does not perform
   // map checks.
   static const int kSlowCaseBitFieldMask =
       (1 << Map::kIsAccessCheckNeeded) | (1 << Map::kHasIndexedInterceptor);
 
   virtual Handle<Code> GetElementStubWithoutMapCheck(
       bool is_js_array,
       ElementsKind elements_kind,
       KeyedAccessGrowMode grow_mode);
 
-  virtual bool IsGeneric() const {
-    return target() == *generic_stub();
-  }
-
  protected:
   virtual Code::Kind kind() const { return Code::KEYED_LOAD_IC; }
 
   virtual Handle<Code> ComputePolymorphicStub(MapHandleList* receiver_maps,
                                               StrictModeFlag strict_mode,
                                               KeyedAccessGrowMode grow_mode);
 
   virtual Handle<Code> string_stub() {
     return isolate()->builtins()->KeyedLoadIC_String();
   }
@@ skipping 137 matching lines @@
   static void GenerateGeneric(MacroAssembler* masm, StrictModeFlag strict_mode);
   static void GenerateNonStrictArguments(MacroAssembler* masm);
   static void GenerateTransitionElementsSmiToDouble(MacroAssembler* masm);
   static void GenerateTransitionElementsDoubleToObject(MacroAssembler* masm);
 
   virtual Handle<Code> GetElementStubWithoutMapCheck(
       bool is_js_array,
       ElementsKind elements_kind,
       KeyedAccessGrowMode grow_mode);
 
-  virtual bool IsGeneric() const {
-    return target() == *generic_stub() ||
-        target() == *generic_stub_strict();
-  }
-
  protected:
   virtual Code::Kind kind() const { return Code::KEYED_STORE_IC; }
 
   virtual Handle<Code> ComputePolymorphicStub(MapHandleList* receiver_maps,
                                               StrictModeFlag strict_mode,
                                               KeyedAccessGrowMode grow_mode);
 
  private:
   // Update the inline cache.
   void UpdateCaches(LookupResult* lookup,
@@ skipping 154 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_