[turbofan] Remove locally constructed simplified builders.

src/compiler/js-type-feedback.h

 // 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.
 
 #ifndef V8_COMPILER_JS_TYPE_FEEDBACK_H_
 #define V8_COMPILER_JS_TYPE_FEEDBACK_H_
 
 #include "src/utils.h"
 
 #include "src/compiler/graph-reducer.h"
 #include "src/compiler/js-graph.h"
 #include "src/compiler/node-aux-data.h"
-#include "src/compiler/simplified-operator.h"
 
 namespace v8 {
 namespace internal {
 
 class TypeFeedbackOracle;
 class SmallMapList;
 class CompilationDependencies;
 
 namespace compiler {
 
@@ skipping 39 matching lines @@
   enum DeoptimizationMode { kDeoptimizationEnabled, kDeoptimizationDisabled };
 
   JSTypeFeedbackSpecializer(Editor* editor, JSGraph* jsgraph,
                             JSTypeFeedbackTable* js_type_feedback,
                             TypeFeedbackOracle* oracle,
                             Handle<GlobalObject> global_object,
                             DeoptimizationMode mode,
                             CompilationDependencies* dependencies)
       : AdvancedReducer(editor),
         jsgraph_(jsgraph),
-        simplified_(jsgraph->graph()->zone()),
         js_type_feedback_(js_type_feedback),
         oracle_(oracle),
         global_object_(global_object),
         mode_(mode),
         dependencies_(dependencies) {
     CHECK_NOT_NULL(js_type_feedback);
   }
 
   Reduction Reduce(Node* node) override;
 
   // Visible for unit testing.
   Reduction ReduceJSLoadGlobal(Node* node);
   Reduction ReduceJSLoadNamed(Node* node);
   Reduction ReduceJSLoadProperty(Node* node);
   Reduction ReduceJSStoreNamed(Node* node);
   Reduction ReduceJSStoreProperty(Node* node);
 
  private:
   JSGraph* jsgraph_;
-  SimplifiedOperatorBuilder simplified_;
   JSTypeFeedbackTable* js_type_feedback_;
   TypeFeedbackOracle* oracle_;
   Handle<GlobalObject> global_object_;
   DeoptimizationMode const mode_;
   CompilationDependencies* dependencies_;
 
   TypeFeedbackOracle* oracle() { return oracle_; }
   Graph* graph() { return jsgraph_->graph(); }
   JSGraph* jsgraph() { return jsgraph_; }
   CommonOperatorBuilder* common() { return jsgraph_->common(); }
+  SimplifiedOperatorBuilder* simplified() { return jsgraph_->simplified(); }
   DeoptimizationMode mode() const { return mode_; }
-  SimplifiedOperatorBuilder* simplified() { return &simplified_; }
 
   void BuildMapCheck(Node* receiver, Handle<Map> map, bool smi_check,
                      Node* effect, Node* control, Node** success, Node** fail);
 
   Node* GetFrameStateBefore(Node* node);
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif