Fix a regression in character-at stub when doing a keyed load on a string. ...

src/ia32/ic-ia32.cc

 // Copyright 2010 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 674 matching lines @@
 }
 
 
 void KeyedLoadIC::GenerateString(MacroAssembler* masm) {
   // ----------- S t a t e -------------
   //  -- eax    : key (index)
   //  -- edx    : receiver
   //  -- esp[0] : return address
   // -----------------------------------
   Label miss;
-  Label index_out_of_range;
 
   Register receiver = edx;
   Register index = eax;
   Register scratch1 = ebx;
   Register scratch2 = ecx;
   Register result = eax;
 
   StringCharAtGenerator char_at_generator(receiver,
                                           index,
                                           scratch1,
                                           scratch2,
                                           result,
                                           &miss,  // When not a string.
                                           &miss,  // When not a number.
-                                          &index_out_of_range,
+                                          &miss,  // When index out of range.
                                           STRING_INDEX_IS_ARRAY_INDEX);
   char_at_generator.GenerateFast(masm);
   __ ret(0);
 
   ICRuntimeCallHelper call_helper;
   char_at_generator.GenerateSlow(masm, call_helper);
 
-  __ bind(&index_out_of_range);
-  __ Set(eax, Immediate(Factory::undefined_value()));
-  __ ret(0);
-
   __ bind(&miss);
   GenerateMiss(masm);
 }
 
 
 void KeyedLoadIC::GenerateExternalArray(MacroAssembler* masm,
                                         ExternalArrayType array_type) {
   // ----------- S t a t e -------------
   //  -- eax    : key
   //  -- edx    : receiver
@@ skipping 1221 matching lines @@
   ExternalReference ref = ExternalReference(IC_Utility(kKeyedStoreIC_Miss));
   __ TailCallExternalReference(ref, 3, 1);
 }
 
 #undef __
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_IA32