Line data    Source code

       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_REDUNDANT_PHI_H_
       6             : #define V8_CRANKSHAFT_HYDROGEN_REDUNDANT_PHI_H_
       7             : 
       8             : #include "src/crankshaft/hydrogen.h"
       9             : 
      10             : namespace v8 {
      11             : namespace internal {
      12             : 
      13             : 
      14             : // Replace all phis consisting of a single non-loop operand plus any number of
      15             : // loop operands by that single non-loop operand.
      16      567464 : class HRedundantPhiEliminationPhase : public HPhase {
      17             :  public:
      18             :   explicit HRedundantPhiEliminationPhase(HGraph* graph)
      19             :       : HPhase("H_Redundant phi elimination", graph) { }
      20             : 
      21             :   void Run();
      22             :   void ProcessBlock(HBasicBlock* block);
      23             : 
      24             :  private:
      25             :   void ProcessPhis(const ZoneList<HPhi*>* phis);
      26             : 
      27             :   DISALLOW_COPY_AND_ASSIGN(HRedundantPhiEliminationPhase);
      28             : };
      29             : 
      30             : 
      31             : }  // namespace internal
      32             : }  // namespace v8
      33             : 
      34             : #endif  // V8_CRANKSHAFT_HYDROGEN_REDUNDANT_PHI_H_