HStoreKeyed for Smis optimized for x64 + related redundant moves of elements removed

src/hydrogen.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 1254 matching lines @@
   HValue* BuildCheckMap(HValue* obj, Handle<Map> map);
   HValue* BuildCheckString(HValue* string);
   HValue* BuildWrapReceiver(HValue* object, HValue* function);
 
   // Building common constructs
   HValue* BuildCheckForCapacityGrow(HValue* object,
                                     HValue* elements,
                                     ElementsKind kind,
                                     HValue* length,
                                     HValue* key,
-                                    bool is_js_array);
+                                    bool is_js_array,
+                                    bool is_store);
 
   HValue* BuildCopyElementsOnWrite(HValue* object,
                                    HValue* elements,
                                    ElementsKind kind,
                                    HValue* length);
 
   void BuildTransitionElementsKind(HValue* object,
                                    HValue* map,
                                    ElementsKind from_kind,
                                    ElementsKind to_kind,
@@ skipping 1344 matching lines @@
   }
 
  private:
   HGraphBuilder* builder_;
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_HYDROGEN_H_