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

src/hydrogen-instructions.cc

Index: src/hydrogen-instructions.cc
diff --git a/src/hydrogen-instructions.cc b/src/hydrogen-instructions.cc
index 93a903adb5695afc068632f0cf5076e1713b08c8..54889f096e1585b3e75b04581ee71156a4e9dc4b 100644
--- a/src/hydrogen-instructions.cc
+++ b/src/hydrogen-instructions.cc
@@ -802,6 +802,9 @@ void HValue::ComputeInitialRange(Zone* zone) {
 
 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);