hydrogen-bce.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_BCE_H_
#define V8_HYDROGEN_BCE_H_
 
#include "src/hydrogen.h"
 
namespace v8 {
namespace internal {
 
 
class BoundsCheckBbData;
class BoundsCheckKey;
class BoundsCheckTable : private ZoneHashMap {
 public:
  explicit BoundsCheckTable(Zone* zone);
 
  INLINE(BoundsCheckBbData** LookupOrInsert(BoundsCheckKey* key, Zone* zone));
  INLINE(void Insert(BoundsCheckKey* key, BoundsCheckBbData* data, Zone* zone));
  INLINE(void Delete(BoundsCheckKey* key));
 
 private:
  DISALLOW_COPY_AND_ASSIGN(BoundsCheckTable);
};
 
 
class HBoundsCheckEliminationPhase : public HPhase {
 public:
  explicit HBoundsCheckEliminationPhase(HGraph* graph)
      : HPhase("H_Bounds checks elimination", graph), table_(zone()) { }
 
  void Run() {
    EliminateRedundantBoundsChecks(graph()->entry_block());
  }
 
 private:
  void EliminateRedundantBoundsChecks(HBasicBlock* bb);
  BoundsCheckBbData* PreProcessBlock(HBasicBlock* bb);
  void PostProcessBlock(HBasicBlock* bb, BoundsCheckBbData* data);
 
  BoundsCheckTable table_;
 
  DISALLOW_COPY_AND_ASSIGN(HBoundsCheckEliminationPhase);
};
 
 
} }  // namespace v8::internal
 
#endif  // V8_HYDROGEN_BCE_H_