Added non observable side effects scope and removed unnecessary calls to AddSimulate.

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 784 matching lines @@
 
 void HValue::ComputeInitialRange(Zone* zone) {
   ASSERT(!HasRange());
   range_ = InferRange(zone);
   ASSERT(HasRange());
 }
 
 
 void HInstruction::PrintTo(StringStream* stream) {
   PrintMnemonicTo(stream);
+  const char* side_effects =
+      CheckFlag(HValue::kHasNoObservableSideEffects) ? "-" : "+";
+  stream->Add("ose%s ", side_effects);
   PrintDataTo(stream);
   PrintRangeTo(stream);
   PrintChangesTo(stream);
   PrintTypeTo(stream);
 }
 
 
 void HInstruction::PrintMnemonicTo(StringStream* stream) {
   stream->Add("%s ", Mnemonic());
 }
@@ skipping 2715 matching lines @@
 
 
 void HCheckFunction::Verify() {
   HInstruction::Verify();
   ASSERT(HasNoUses());
 }
 
 #endif
 
 } }  // namespace v8::internal