1 /* 2 * Copyright (C) 2013 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef ART_COMPILER_UTILS_ARENA_BIT_VECTOR_H_ 18 #define ART_COMPILER_UTILS_ARENA_BIT_VECTOR_H_ 19 20 #include "base/bit_vector.h" 21 #include "utils/arena_allocator.h" 22 #include "utils/scoped_arena_allocator.h" 23 24 namespace art { 25 26 // Type of growable bitmap for memory tuning. 27 enum OatBitMapKind { 28 kBitMapMisc = 0, 29 kBitMapUse, 30 kBitMapDef, 31 kBitMapLiveIn, 32 kBitMapBMatrix, 33 kBitMapDominators, 34 kBitMapIDominated, 35 kBitMapDomFrontier, 36 kBitMapPhi, 37 kBitMapTmpBlocks, 38 kBitMapInputBlocks, 39 kBitMapRegisterV, 40 kBitMapTempSSARegisterV, 41 kBitMapNullCheck, 42 kBitMapClInitCheck, 43 kBitMapTmpBlockV, 44 kBitMapPredecessors, 45 kNumBitMapKinds 46 }; 47 48 std::ostream& operator<<(std::ostream& os, const OatBitMapKind& kind); 49 50 /* 51 * A BitVector implementation that uses Arena allocation. 52 */ 53 class ArenaBitVector : public BitVector { 54 public: 55 ArenaBitVector(ArenaAllocator* arena, uint32_t start_bits, bool expandable, 56 OatBitMapKind kind = kBitMapMisc); 57 ArenaBitVector(ScopedArenaAllocator* arena, uint32_t start_bits, bool expandable, 58 OatBitMapKind kind = kBitMapMisc); 59 ~ArenaBitVector() {} 60 61 static void* operator new(size_t size, ArenaAllocator* arena) { 62 return arena->Alloc(sizeof(ArenaBitVector), kArenaAllocGrowableBitMap); 63 } 64 static void* operator new(size_t size, ScopedArenaAllocator* arena) { 65 return arena->Alloc(sizeof(ArenaBitVector), kArenaAllocGrowableBitMap); 66 } 67 static void operator delete(void* p) {} // Nop. 68 69 private: 70 const OatBitMapKind kind_; // for memory use tuning. TODO: currently unused. 71 }; 72 73 74 } // namespace art 75 76 #endif // ART_COMPILER_UTILS_ARENA_BIT_VECTOR_H_ 77
