Improve keyed loads on strings by using a new stub

src/builtins.cc

 // Copyright 2006-2008 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 526 matching lines @@
 static void Generate_KeyedLoadIC_Miss(MacroAssembler* masm) {
   KeyedLoadIC::GenerateMiss(masm);
 }
 
 
 static void Generate_KeyedLoadIC_Generic(MacroAssembler* masm) {
   KeyedLoadIC::GenerateGeneric(masm);
 }
 
 
+static void Generate_KeyedLoadIC_String(MacroAssembler* masm) {
+  KeyedLoadIC::GenerateString(masm);
+}
+
+
 static void Generate_KeyedLoadIC_ExternalByteArray(MacroAssembler* masm) {
   KeyedLoadIC::GenerateExternalArray(masm, kExternalByteArray);
 }
 
 
 static void Generate_KeyedLoadIC_ExternalUnsignedByteArray(
     MacroAssembler* masm) {
   KeyedLoadIC::GenerateExternalArray(masm, kExternalUnsignedByteArray);
 }
 
@@ skipping 280 matching lines @@
       if (entry->contains(pc)) {
         return names_[i];
       }
     }
   }
   return NULL;
 }
 
 
 } }  // namespace v8::internal