1// Copyright 2013 the V8 project authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#ifndef V8_HYDROGEN_DCE_H_
6#define V8_HYDROGEN_DCE_H_
7
8#include "src/hydrogen.h"
9
10namespace v8 {
11namespace internal {
12
13
14class HDeadCodeEliminationPhase : public HPhase {
15 public:
16  explicit HDeadCodeEliminationPhase(HGraph* graph)
17      : HPhase("H_Dead code elimination", graph) { }
18
19  void Run() {
20    MarkLiveInstructions();
21    RemoveDeadInstructions();
22  }
23
24 private:
25  void MarkLive(HValue* instr, ZoneList<HValue*>* worklist);
26  void PrintLive(HValue* ref, HValue* instr);
27  void MarkLiveInstructions();
28  void RemoveDeadInstructions();
29};
30
31
32} }  // namespace v8::internal
33
34#endif  // V8_HYDROGEN_DCE_H_
35