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_CRANKSHAFT_HYDROGEN_DCE_H_
6 #define V8_CRANKSHAFT_HYDROGEN_DCE_H_
7 
8 #include "src/crankshaft/hydrogen.h"
9 
10 namespace v8 {
11 namespace internal {
12 
13 
14 class 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 internal
33 }  // namespace v8
34 
35 #endif  // V8_CRANKSHAFT_HYDROGEN_DCE_H_
36