[turbofan] Output file for C1 visualizer.

src/compiler/schedule.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_SCHEDULE_H_
 #define V8_COMPILER_SCHEDULE_H_
 
 #include <iosfwd>
 #include <vector>
 
@@ skipping 200 matching lines @@
 
   // BasicBlock building: add a return at the end of {block}.
   void AddReturn(BasicBlock* block, Node* input);
 
   // BasicBlock building: add a throw at the end of {block}.
   void AddThrow(BasicBlock* block, Node* input);
 
   void AddSuccessor(BasicBlock* block, BasicBlock* succ);
 
   BasicBlockVector* rpo_order() { return &rpo_order_; }
+  const BasicBlockVector* rpo_order() const { return &rpo_order_; }
 
   BasicBlock* start() { return start_; }
   BasicBlock* end() { return end_; }
 
-  Zone* zone() { return zone_; }
+  Zone* zone() const { return zone_; }
 
  private:
   friend class Scheduler;
   friend class CodeGenerator;
   friend class ScheduleVisualizer;
   friend class BasicBlockInstrumentor;
 
   void SetControlInput(BasicBlock* block, Node* node);
   void SetBlockForNode(BasicBlock* block, Node* node);
 
   Zone* zone_;
   BasicBlockVector all_blocks_;           // All basic blocks in the schedule.
   BasicBlockVector nodeid_to_block_;      // Map from node to containing block.
   BasicBlockVector rpo_order_;            // Reverse-post-order block list.
   BasicBlock* start_;
   BasicBlock* end_;
 };
 
 std::ostream& operator<<(std::ostream& os, const Schedule& s);
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_SCHEDULE_H_