Fix bug in constant folding object comparisons.

src/hydrogen-instructions.cc

 // 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 3038 matching lines @@
 void HCompareObjectEqAndBranch::PrintDataTo(StringStream* stream) {
   left()->PrintNameTo(stream);
   stream->Add(" ");
   right()->PrintNameTo(stream);
   HControlInstruction::PrintDataTo(stream);
 }
 
 
 bool HCompareObjectEqAndBranch::KnownSuccessorBlock(HBasicBlock** block) {
   if (FLAG_fold_constants && left()->IsConstant() && right()->IsConstant()) {
-    *block = HConstant::cast(left())->Equals(HConstant::cast(right()))
+    *block = HConstant::cast(left())->DataEquals(HConstant::cast(right()))
         ? FirstSuccessor() : SecondSuccessor();
     return true;
   }
   *block = NULL;
   return false;
 }
 
 
 bool ConstantIsObject(HConstant* constant, Isolate* isolate) {
   if (constant->HasNumberValue()) return false;
@@ skipping 1473 matching lines @@
       break;
     case kExternalMemory:
       stream->Add("[external-memory]");
       break;
   }
 
   stream->Add("@%d", offset());
 }
 
 } }  // namespace v8::internal