Correctify instanceof and make it optimizable.

src/compiler/js-generic-lowering.cc

 // Copyright 2014 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-factory.h"
 #include "src/code-stubs.h"
 #include "src/compiler/common-operator.h"
 #include "src/compiler/js-generic-lowering.h"
 #include "src/compiler/js-graph.h"
 #include "src/compiler/machine-operator.h"
@@ skipping 425 matching lines @@
 }
 
 
 void JSGenericLowering::LowerJSHasProperty(Node* node) {
   ReplaceWithBuiltinCall(node, Builtins::IN, 2);
 }
 
 
 void JSGenericLowering::LowerJSInstanceOf(Node* node) {
   CallDescriptor::Flags flags = AdjustFrameStatesForCall(node);
-  InstanceofStub::Flags stub_flags = static_cast<InstanceofStub::Flags>(
-      InstanceofStub::kReturnTrueFalseObject |
-      InstanceofStub::kArgsInRegisters);
-  Callable callable = CodeFactory::Instanceof(isolate(), stub_flags);
+  Callable callable = CodeFactory::InstanceOf(isolate());
   ReplaceWithStubCall(node, callable, flags);
 }
 
 
 void JSGenericLowering::LowerJSLoadContext(Node* node) {
   const ContextAccess& access = ContextAccessOf(node->op());
   for (size_t i = 0; i < access.depth(); ++i) {
     node->ReplaceInput(
         0, graph()->NewNode(machine()->Load(kMachAnyTagged),
                             NodeProperties::GetValueInput(node, 0),
@@ skipping 389 matching lines @@
 }
 
 
 MachineOperatorBuilder* JSGenericLowering::machine() const {
   return jsgraph()->machine();
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8