1// Copyright 2013 the V8 project authors. All rights reserved. 2// Redistribution and use in source and binary forms, with or without 3// modification, are permitted provided that the following conditions are 4// met: 5// 6// * Redistributions of source code must retain the above copyright 7// notice, this list of conditions and the following disclaimer. 8// * Redistributions in binary form must reproduce the above 9// copyright notice, this list of conditions and the following 10// disclaimer in the documentation and/or other materials provided 11// with the distribution. 12// * Neither the name of Google Inc. nor the names of its 13// contributors may be used to endorse or promote products derived 14// from this software without specific prior written permission. 15// 16// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 28#ifndef V8_HYDROGEN_BCE_H_ 29#define V8_HYDROGEN_BCE_H_ 30 31#include "hydrogen.h" 32 33namespace v8 { 34namespace internal { 35 36 37class BoundsCheckBbData; 38class BoundsCheckKey; 39class BoundsCheckTable : private ZoneHashMap { 40 public: 41 explicit BoundsCheckTable(Zone* zone); 42 43 INLINE(BoundsCheckBbData** LookupOrInsert(BoundsCheckKey* key, Zone* zone)); 44 INLINE(void Insert(BoundsCheckKey* key, BoundsCheckBbData* data, Zone* zone)); 45 INLINE(void Delete(BoundsCheckKey* key)); 46 47 private: 48 DISALLOW_COPY_AND_ASSIGN(BoundsCheckTable); 49}; 50 51 52class HBoundsCheckEliminationPhase : public HPhase { 53 public: 54 explicit HBoundsCheckEliminationPhase(HGraph* graph) 55 : HPhase("H_Bounds checks elimination", graph), table_(zone()) { } 56 57 void Run() { 58 EliminateRedundantBoundsChecks(graph()->entry_block()); 59 } 60 61 private: 62 void EliminateRedundantBoundsChecks(HBasicBlock* bb); 63 BoundsCheckBbData* PreProcessBlock(HBasicBlock* bb); 64 void PostProcessBlock(HBasicBlock* bb, BoundsCheckBbData* data); 65 66 BoundsCheckTable table_; 67 68 DISALLOW_COPY_AND_ASSIGN(HBoundsCheckEliminationPhase); 69}; 70 71 72} } // namespace v8::internal 73 74#endif // V8_HYDROGEN_BCE_H_ 75