Revert "Use the same registers for StoreIC and KeyedStoreIC."

src/ic.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_IC_H_
 #define V8_IC_H_
 
 #include "src/macro-assembler.h"
 
 namespace v8 {
@@ skipping 687 matching lines @@
 
   static KeyedAccessStoreMode GetKeyedAccessStoreMode(
       ExtraICState extra_state) {
     return ExtraICStateKeyedAccessStoreMode::decode(extra_state);
   }
 
   static const Register ReceiverRegister();
   static const Register NameRegister();
   static const Register ValueRegister();
 
-  // The map register isn't part of the normal call specification, but
-  // ElementsTransitionAndStoreStub, used in polymorphic keyed store
-  // stub implementations requires it to be initialized.
-  static const Register MapRegister();
-
   KeyedStoreIC(FrameDepth depth, Isolate* isolate)
       : StoreIC(depth, isolate) {
     ASSERT(target()->is_keyed_store_stub());
   }
 
   MUST_USE_RESULT MaybeHandle<Object> Store(Handle<Object> object,
                                             Handle<Object> name,
                                             Handle<Object> value);
 
   // Code generators for stub routines.  Only called once at startup.
@@ skipping 320 matching lines @@
 DECLARE_RUNTIME_FUNCTION(ElementsTransitionAndStoreIC_Miss);
 DECLARE_RUNTIME_FUNCTION(BinaryOpIC_Miss);
 DECLARE_RUNTIME_FUNCTION(BinaryOpIC_MissWithAllocationSite);
 DECLARE_RUNTIME_FUNCTION(CompareNilIC_Miss);
 DECLARE_RUNTIME_FUNCTION(ToBooleanIC_Miss);
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_IC_H_