Simplify CheckPrototypeMaps.

src/ia32/lithium-ia32.h

 // Copyright 2011 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 59 matching lines @@
 //     LShiftI
 //     LSubI
 //   LCallConstantFunction
 //   LCallFunction
 //   LCallGlobal
 //   LCallKeyed
 //   LCallKnownGlobal
 //   LCallNamed
 //   LCallRuntime
 //   LCallStub
+//   LCheckPrototypeMaps
 //   LConstant
 //     LConstantD
 //     LConstantI
 //     LConstantT
 //   LDeoptimize
 //   LFunctionLiteral
 //   LGap
 //     LLabel
 //   LGlobalObject
 //   LGlobalReceiver
@@ skipping 14 matching lines @@
 //   LStoreNamed
 //     LStoreNamedField
 //     LStoreNamedGeneric
 //   LUnaryOperation
 //     LBitNotI
 //     LBranch
 //     LCallNew
 //     LCheckFunction
 //     LCheckInstanceType
 //     LCheckMap
-//     LCheckPrototypeMaps
 //     LCheckSmi
 //     LClassOfTest
 //     LClassOfTestAndBranch
 //     LDeleteProperty
 //     LDoubleToI
 //     LFixedArrayLength
 //     LHasCachedArrayIndex
 //     LHasCachedArrayIndexAndBranch
 //     LHasInstanceType
 //     LHasInstanceTypeAndBranch
@@ skipping 1555 matching lines @@
 };
 
 
 class LCheckPrototypeMaps: public LTemplateInstruction<0, 0, 0> {
  public:
   explicit LCheckPrototypeMaps(LOperand* temp) : temp_(temp) { }
 
   DECLARE_CONCRETE_INSTRUCTION(CheckPrototypeMaps, "check-prototype-maps")
   DECLARE_HYDROGEN_ACCESSOR(CheckPrototypeMaps)
 
+  Handle<JSObject> prototype() const { return hydrogen()->prototype(); }
   Handle<JSObject> holder() const { return hydrogen()->holder(); }
-  Handle<Map> receiver_map() const { return hydrogen()->receiver_map(); }
 
   LOperand* temp() const { return temp_; }
 
  private:
   LOperand* temp_;
 };
 
 
 class LCheckSmi: public LUnaryOperation<0> {
  public:
@@ skipping 337 matching lines @@
   DISALLOW_COPY_AND_ASSIGN(LChunkBuilder);
 };
 
 #undef DECLARE_HYDROGEN_ACCESSOR
 #undef DECLARE_INSTRUCTION
 #undef DECLARE_CONCRETE_INSTRUCTION
 
 } }  // namespace v8::internal
 
 #endif  // V8_IA32_LITHIUM_IA32_H_