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: HDeadCodeEliminationPhase(HGraph * graph)16 explicit HDeadCodeEliminationPhase(HGraph* graph) 17 : HPhase("H_Dead code elimination", graph) { } 18 Run()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