Avoid usage of temporary MachineOperatorBuilder.

src/compiler/simplified-operator-reducer.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/compiler/generic-node-inl.h"
 #include "src/compiler/js-graph.h"
 #include "src/compiler/machine-operator.h"
 #include "src/compiler/node-matchers.h"
 #include "src/compiler/simplified-operator-reducer.h"
 
@@ skipping 119 matching lines @@
 }
 
 
 Graph* SimplifiedOperatorReducer::graph() const { return jsgraph()->graph(); }
 
 
 Factory* SimplifiedOperatorReducer::factory() const {
   return jsgraph()->isolate()->factory();
 }
 
+
+MachineOperatorBuilder* SimplifiedOperatorReducer::machine() const {
+  return jsgraph()->machine();
+}
+
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8