Disallow dereferencing deferred handles when generating optimized code.

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 2182 matching lines @@
   if (has_int32_value_) {
     stream->Add("%d ", int32_value_);
   } else if (has_double_value_) {
     stream->Add("%f ", FmtElm(double_value_));
   } else {
     handle()->ShortPrint(stream);
   }
 }
 
 
-bool HArrayLiteral::IsCopyOnWrite() const {
-  if (!boilerplate_object_->IsJSObject()) return false;
-  return Handle<JSObject>::cast(boilerplate_object_)->elements()->map() ==
-      HEAP->fixed_cow_array_map();
-}
-
-
 void HBinaryOperation::PrintDataTo(StringStream* stream) {
   left()->PrintNameTo(stream);
   stream->Add(" ");
   right()->PrintNameTo(stream);
   if (CheckFlag(kCanOverflow)) stream->Add(" !");
   if (CheckFlag(kBailoutOnMinusZero)) stream->Add(" -0?");
 }
 
 
 void HBinaryOperation::InferRepresentation(HInferRepresentation* h_infer) {
@@ skipping 1377 matching lines @@
 
 
 void HCheckFunction::Verify() {
   HInstruction::Verify();
   ASSERT(HasNoUses());
 }
 
 #endif
 
 } }  // namespace v8::internal