[turbofan] Remove locally constructed simplified builders.

src/compiler/js-typed-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/compiler/access-builder.h"
 #include "src/compiler/js-graph.h"
 #include "src/compiler/js-typed-lowering.h"
 #include "src/compiler/linkage.h"
 #include "src/compiler/node-matchers.h"
 #include "src/compiler/node-properties.h"
 #include "src/compiler/operator-properties.h"
 #include "src/types.h"
 
 namespace v8 {
 namespace internal {
 namespace compiler {
 
 // TODO(turbofan): js-typed-lowering improvements possible
 // - immediately put in type bounds for all new nodes
 // - relax effects from generic but not-side-effecting operations
 
 
 JSTypedLowering::JSTypedLowering(Editor* editor, JSGraph* jsgraph, Zone* zone)
-    : AdvancedReducer(editor), jsgraph_(jsgraph), simplified_(graph()->zone()) {
+    : AdvancedReducer(editor), jsgraph_(jsgraph) {
   for (size_t k = 0; k < arraysize(shifted_int32_ranges_); ++k) {
     double min = kMinInt / (1 << k);
     double max = kMaxInt / (1 << k);
     shifted_int32_ranges_[k] = Type::Range(min, max, graph()->zone());
   }
 }
 
 
 // A helper class to construct inline allocations on the simplified operator
 // level. This keeps track of the effect chain for initial stores on a newly
@@ skipping 1793 matching lines @@
 JSOperatorBuilder* JSTypedLowering::javascript() const {
   return jsgraph()->javascript();
 }
 
 
 CommonOperatorBuilder* JSTypedLowering::common() const {
   return jsgraph()->common();
 }
 
 
+SimplifiedOperatorBuilder* JSTypedLowering::simplified() const {
+  return jsgraph()->simplified();
+}
+
+
 MachineOperatorBuilder* JSTypedLowering::machine() const {
   return jsgraph()->machine();
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8