Correctify instanceof and make it optimizable.

src/code-stubs.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/code-stubs.h"
 
 #include <sstream>
 
 #include "src/bootstrapper.h"
 #include "src/cpu-profiler.h"
@@ skipping 576 matching lines @@
 void CallIC_ArrayStub::PrintState(std::ostream& os) const {  // NOLINT
   os << state() << " (Array)";
 }
 
 
 void CallICStub::PrintState(std::ostream& os) const {  // NOLINT
   os << state();
 }
 
 
-void InstanceofStub::PrintName(std::ostream& os) const {  // NOLINT
-  os << "InstanceofStub";
-  if (HasArgsInRegisters()) os << "_REGS";
-  if (HasCallSiteInlineCheck()) os << "_INLINE";
-  if (ReturnTrueFalseObject()) os << "_TRUEFALSE";
-}
-
-
 void JSEntryStub::FinishCode(Handle<Code> code) {
   Handle<FixedArray> handler_table =
       code->GetIsolate()->factory()->NewFixedArray(1, TENURED);
   handler_table->set(0, Smi::FromInt(handler_offset_));
   code->set_handler_table(*handler_table);
 }
 
 
 void LoadDictionaryElementStub::InitializeDescriptor(
     CodeStubDescriptor* descriptor) {
@@ skipping 459 matching lines @@
 
   if (type->Is(Type::UntaggedPointer())) {
     return Representation::External();
   }
 
   DCHECK(!type->Is(Type::Untagged()));
   return Representation::Tagged();
 }
 }  // namespace internal
 }  // namespace v8