Let BuildStore/BuildLoad distinguish between keyed/named load/stores.

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 2020 matching lines @@
                                           Handle<String> name,
                                           Handle<Map> map);
 
   HCheckMaps* AddCheckMap(HValue* object, Handle<Map> map);
 
   void BuildLoad(Property* property,
                  int position,
                  BailoutId ast_id);
   void PushLoad(Property* property,
                 HValue* object,
+                HValue* key,
                 int position);
 
-  void BuildStoreInEffect(Expression* expression,
-                          Property* prop,
-                          BailoutId ast_id,
-                          BailoutId return_id,
-                          HValue* object,
-                          HValue* value);
+  void BuildStoreForEffect(Expression* expression,
+                           Property* prop,
+                           BailoutId ast_id,
+                           BailoutId return_id,
+                           HValue* object,
+                           HValue* key,
+                           HValue* value);
 
-  void BuildStoreNamed(Expression* expression,
-                       BailoutId id,
-                       BailoutId assignment_id,
-                       Property* prop,
-                       HValue* object,
-                       HValue* value);
+  void BuildStore(Expression* expression,
+                  Property* prop,
+                  BailoutId ast_id,
+                  BailoutId return_id,
+                  bool is_uninitialized = false);
 
   HInstruction* BuildStoreNamedField(HValue* object,
                                      Handle<String> name,
                                      HValue* value,
                                      Handle<Map> map,
                                      LookupResult* lookup);
   HInstruction* BuildStoreNamedGeneric(HValue* object,
                                        Handle<String> name,
                                        HValue* value);
   HInstruction* BuildStoreNamedMonomorphic(HValue* object,
@@ skipping 230 matching lines @@
   }
 
  private:
   HGraphBuilder* builder_;
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_HYDROGEN_H_