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/*
* Copyright (C) 2013 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef ART_COMPILER_UTILS_ARENA_BIT_VECTOR_H_
#define ART_COMPILER_UTILS_ARENA_BIT_VECTOR_H_
#include "base/bit_vector.h"
#include "utils/arena_allocator.h"
namespace art {
// Type of growable bitmap for memory tuning.
enum OatBitMapKind {
kBitMapMisc = 0,
kBitMapUse,
kBitMapDef,
kBitMapLiveIn,
kBitMapBMatrix,
kBitMapDominators,
kBitMapIDominated,
kBitMapDomFrontier,
kBitMapPhi,
kBitMapTmpBlocks,
kBitMapInputBlocks,
kBitMapRegisterV,
kBitMapTempSSARegisterV,
kBitMapNullCheck,
kBitMapTmpBlockV,
kBitMapPredecessors,
kNumBitMapKinds
};
std::ostream& operator<<(std::ostream& os, const OatBitMapKind& kind);
/*
* A BitVector implementation that uses Arena allocation.
*/
class ArenaBitVector : public BitVector {
public:
ArenaBitVector(ArenaAllocator* arena, uint32_t start_bits, bool expandable,
OatBitMapKind kind = kBitMapMisc);
~ArenaBitVector() {}
static void* operator new(size_t size, ArenaAllocator* arena) {
return arena->Alloc(sizeof(ArenaBitVector), ArenaAllocator::kAllocGrowableBitMap);
}
static void operator delete(void* p) {} // Nop.
private:
const OatBitMapKind kind_; // for memory use tuning. TODO: currently unused.
};
} // namespace art
#endif // ART_COMPILER_UTILS_ARENA_BIT_VECTOR_H_
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