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 33 namespace v8 { 34 namespace internal { 35 36 37 class BoundsCheckBbData; 38 class BoundsCheckKey; 39 class 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 52 class HBoundsCheckEliminationPhase : public HPhase { 53 public: HBoundsCheckEliminationPhase(HGraph * graph)54 explicit HBoundsCheckEliminationPhase(HGraph* graph) 55 : HPhase("H_Bounds checks elimination", graph), table_(zone()) { } 56 Run()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