hydrogen-redundant-phi.h

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// 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_HYDROGEN_REDUNDANT_PHI_H_
#define V8_HYDROGEN_REDUNDANT_PHI_H_
 
#include "src/hydrogen.h"
 
namespace v8 {
namespace internal {
 
 
// Replace all phis consisting of a single non-loop operand plus any number of
// loop operands by that single non-loop operand.
class HRedundantPhiEliminationPhase : public HPhase {
 public:
  explicit HRedundantPhiEliminationPhase(HGraph* graph)
      : HPhase("H_Redundant phi elimination", graph) { }
 
  void Run();
  void ProcessBlock(HBasicBlock* block);
 
 private:
  void ProcessPhis(const ZoneList<HPhi*>* phis);
 
  DISALLOW_COPY_AND_ASSIGN(HRedundantPhiEliminationPhase);
};
 
 
} }  // namespace v8::internal
 
#endif  // V8_HYDROGEN_REDUNDANT_PHI_H_