[es6] Reintroduce the instanceof operator in the backends.

src/compiler/js-intrinsic-lowering.cc

 // Copyright 2015 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/compiler/js-intrinsic-lowering.h"
 
 #include <stack>
 
 #include "src/code-factory.h"
 #include "src/compiler/access-builder.h"
@@ skipping 68 matching lines @@
     case Runtime::kInlineToPrimitive:
       return ReduceToPrimitive(node);
     case Runtime::kInlineToString:
       return ReduceToString(node);
     case Runtime::kInlineCall:
       return ReduceCall(node);
     case Runtime::kInlineNewObject:
       return ReduceNewObject(node);
     case Runtime::kInlineGetSuperConstructor:
       return ReduceGetSuperConstructor(node);
-    case Runtime::kInlineGetOrdinaryHasInstance:
-      return ReduceGetOrdinaryHasInstance(node);
     default:
       break;
   }
   return NoChange();
 }
 
 
 Reduction JSIntrinsicLowering::ReduceCreateIterResultObject(Node* node) {
   Node* const value = NodeProperties::GetValueInput(node, 0);
   Node* const done = NodeProperties::GetValueInput(node, 1);
@@ skipping 303 matching lines @@
   Node* active_function = NodeProperties::GetValueInput(node, 0);
   Node* effect = NodeProperties::GetEffectInput(node);
   Node* control = NodeProperties::GetControlInput(node);
   Node* active_function_map = effect =
       graph()->NewNode(simplified()->LoadField(AccessBuilder::ForMap()),
                        active_function, effect, control);
   return Change(node, simplified()->LoadField(AccessBuilder::ForMapPrototype()),
                 active_function_map, effect, control);
 }
 
-Reduction JSIntrinsicLowering::ReduceGetOrdinaryHasInstance(Node* node) {
-  Node* effect = NodeProperties::GetEffectInput(node);
-  Node* context = NodeProperties::GetContextInput(node);
-  Node* native_context = effect = graph()->NewNode(
-      javascript()->LoadContext(0, Context::NATIVE_CONTEXT_INDEX, true),
-      context, context, effect);
-  return Change(node, javascript()->LoadContext(
-                          0, Context::ORDINARY_HAS_INSTANCE_INDEX, true),
-                native_context, context, effect);
-}
-
 Reduction JSIntrinsicLowering::Change(Node* node, const Operator* op, Node* a,
                                       Node* b) {
   RelaxControls(node);
   node->ReplaceInput(0, a);
   node->ReplaceInput(1, b);
   node->TrimInputCount(2);
   NodeProperties::ChangeOp(node, op);
   return Changed(node);
 }
 
@@ skipping 55 matching lines @@
 }
 
 
 SimplifiedOperatorBuilder* JSIntrinsicLowering::simplified() const {
   return jsgraph()->simplified();
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8