[turbofan] Next step towards shared operators.

src/compiler/graph-builder.h

 // Copyright 2013 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_GRAPH_BUILDER_H_
 #define V8_COMPILER_GRAPH_BUILDER_H_
 
 #include "src/v8.h"
 
 #include "src/allocation.h"
 #include "src/compiler/common-operator.h"
 #include "src/compiler/graph.h"
 #include "src/unique.h"
 
 namespace v8 {
 namespace internal {
 namespace compiler {
 
 class Node;
 
 // A common base class for anything that creates nodes in a graph.
 class GraphBuilder {
  public:
   explicit GraphBuilder(Graph* graph) : graph_(graph) {}
   virtual ~GraphBuilder() {}
 
-  Node* NewNode(Operator* op) {
+  Node* NewNode(const Operator* op) {
     return MakeNode(op, 0, static_cast<Node**>(NULL));
   }
 
-  Node* NewNode(Operator* op, Node* n1) { return MakeNode(op, 1, &n1); }
+  Node* NewNode(const Operator* op, Node* n1) { return MakeNode(op, 1, &n1); }
 
-  Node* NewNode(Operator* op, Node* n1, Node* n2) {
+  Node* NewNode(const Operator* op, Node* n1, Node* n2) {
     Node* buffer[] = {n1, n2};
     return MakeNode(op, arraysize(buffer), buffer);
   }
 
-  Node* NewNode(Operator* op, Node* n1, Node* n2, Node* n3) {
+  Node* NewNode(const Operator* op, Node* n1, Node* n2, Node* n3) {
     Node* buffer[] = {n1, n2, n3};
     return MakeNode(op, arraysize(buffer), buffer);
   }
 
-  Node* NewNode(Operator* op, Node* n1, Node* n2, Node* n3, Node* n4) {
+  Node* NewNode(const Operator* op, Node* n1, Node* n2, Node* n3, Node* n4) {
     Node* buffer[] = {n1, n2, n3, n4};
     return MakeNode(op, arraysize(buffer), buffer);
   }
 
-  Node* NewNode(Operator* op, Node* n1, Node* n2, Node* n3, Node* n4,
+  Node* NewNode(const Operator* op, Node* n1, Node* n2, Node* n3, Node* n4,
                 Node* n5) {
     Node* buffer[] = {n1, n2, n3, n4, n5};
     return MakeNode(op, arraysize(buffer), buffer);
   }
 
-  Node* NewNode(Operator* op, Node* n1, Node* n2, Node* n3, Node* n4, Node* n5,
-                Node* n6) {
+  Node* NewNode(const Operator* op, Node* n1, Node* n2, Node* n3, Node* n4,
+                Node* n5, Node* n6) {
     Node* nodes[] = {n1, n2, n3, n4, n5, n6};
     return MakeNode(op, arraysize(nodes), nodes);
   }
 
-  Node* NewNode(Operator* op, int value_input_count, Node** value_inputs) {
+  Node* NewNode(const Operator* op, int value_input_count,
+                Node** value_inputs) {
     return MakeNode(op, value_input_count, value_inputs);
   }
 
   Graph* graph() const { return graph_; }
 
  protected:
   // Base implementation used by all factory methods.
-  virtual Node* MakeNode(Operator* op, int value_input_count,
+  virtual Node* MakeNode(const Operator* op, int value_input_count,
                          Node** value_inputs) = 0;
 
  private:
   Graph* graph_;
 };
 
 
 // The StructuredGraphBuilder produces a high-level IR graph. It is used as the
 // base class for concrete implementations (e.g the AstGraphBuilder or the
 // StubGraphBuilder).
@@ skipping 21 matching lines @@
   }
 
  protected:
   class Environment;
   friend class Environment;
   friend class ControlBuilder;
 
   // The following method creates a new node having the specified operator and
   // ensures effect and control dependencies are wired up. The dependencies
   // tracked by the environment might be mutated.
-  virtual Node* MakeNode(Operator* op, int value_input_count,
-                         Node** value_inputs);
+  virtual Node* MakeNode(const Operator* op, int value_input_count,
+                         Node** value_inputs) FINAL;
 
   Environment* environment() const { return environment_; }
   void set_environment(Environment* env) { environment_ = env; }
 
   Node* current_context() const { return current_context_; }
   void set_current_context(Node* context) { current_context_ = context; }
 
   Node* exit_control() const { return exit_control_; }
   void set_exit_control(Node* node) { exit_control_ = node; }
 
@@ skipping 98 matching lines @@
   StructuredGraphBuilder* builder_;
   Node* control_dependency_;
   Node* effect_dependency_;
   NodeVector values_;
 };
 }
 }
 }  // namespace v8::internal::compiler
 
 #endif  // V8_COMPILER_GRAPH_BUILDER_H__