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/arena_object.h"
21 #include "base/bit_vector.h"
22 
23 namespace art {
24 
25 class ArenaAllocator;
26 class ScopedArenaAllocator;
27 
28 // Type of growable bitmap for memory tuning.
29 enum OatBitMapKind {
30   kBitMapMisc = 0,
31   kBitMapUse,
32   kBitMapDef,
33   kBitMapLiveIn,
34   kBitMapBMatrix,
35   kBitMapDominators,
36   kBitMapIDominated,
37   kBitMapDomFrontier,
38   kBitMapRegisterV,
39   kBitMapTempSSARegisterV,
40   kBitMapNullCheck,
41   kBitMapClInitCheck,
42   kBitMapPredecessors,
43   kNumBitMapKinds
44 };
45 
46 std::ostream& operator<<(std::ostream& os, const OatBitMapKind& kind);
47 
48 /*
49  * A BitVector implementation that uses Arena allocation.
50  */
51 class ArenaBitVector : public BitVector, public ArenaObject<kArenaAllocGrowableBitMap> {
52  public:
53   ArenaBitVector(ArenaAllocator* arena, uint32_t start_bits, bool expandable,
54                  OatBitMapKind kind = kBitMapMisc);
55   ArenaBitVector(ScopedArenaAllocator* arena, uint32_t start_bits, bool expandable,
56                  OatBitMapKind kind = kBitMapMisc);
~ArenaBitVector()57   ~ArenaBitVector() {}
58 
59  private:
60   const OatBitMapKind kind_;      // for memory use tuning. TODO: currently unused.
61 
62   DISALLOW_COPY_AND_ASSIGN(ArenaBitVector);
63 };
64 
65 
66 }  // namespace art
67 
68 #endif  // ART_COMPILER_UTILS_ARENA_BIT_VECTOR_H_
69