[turbofan] Next step towards shared operators.

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 84 matching lines @@
       if (m.HasValue()) return ReplaceNumber(FastUI2D(m.Value()));
       break;
     }
     default:
       break;
   }
   return NoChange();
 }
 
 
-Reduction SimplifiedOperatorReducer::Change(Node* node, Operator* op, Node* a) {
+Reduction SimplifiedOperatorReducer::Change(Node* node, const Operator* op,
+                                            Node* a) {
   node->set_op(op);
   node->ReplaceInput(0, a);
   return Changed(node);
 }
 
 
 Reduction SimplifiedOperatorReducer::ReplaceFloat64(double value) {
   return Replace(jsgraph()->Float64Constant(value));
 }
 
@@ skipping 16 matching lines @@
 Graph* SimplifiedOperatorReducer::graph() const { return jsgraph()->graph(); }
 
 
 Factory* SimplifiedOperatorReducer::factory() const {
   return jsgraph()->isolate()->factory();
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8