1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
|
/*
* Copyright (C) 2014 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_OPTIMIZING_BUILDER_H_
#define ART_COMPILER_OPTIMIZING_BUILDER_H_
#include "utils/allocation.h"
#include "utils/growable_array.h"
namespace art {
class ArenaAllocator;
class Instruction;
class HBasicBlock;
class HGraph;
class HGraphBuilder : public ValueObject {
public:
explicit HGraphBuilder(ArenaAllocator* arena)
: arena_(arena),
branch_targets_(arena, 0),
entry_block_(nullptr),
exit_block_(nullptr),
current_block_(nullptr),
graph_(nullptr) { }
HGraph* BuildGraph(const uint16_t* start, const uint16_t* end);
private:
// Analyzes the dex instruction and adds HInstruction to the graph
// to execute that instruction. Returns whether the instruction can
// be handled.
bool AnalyzeDexInstruction(const Instruction& instruction, int32_t dex_offset);
// Finds all instructions that start a new block, and populates branch_targets_ with
// the newly created blocks.
void ComputeBranchTargets(const uint16_t* start, const uint16_t* end);
void MaybeUpdateCurrentBlock(size_t index);
HBasicBlock* FindBlockStartingAt(int32_t index) const;
ArenaAllocator* const arena_;
// A list of the size of the dex code holding block information for
// the method. If an entry contains a block, then the dex instruction
// starting at that entry is the first instruction of a new block.
GrowableArray<HBasicBlock*> branch_targets_;
HBasicBlock* entry_block_;
HBasicBlock* exit_block_;
HBasicBlock* current_block_;
HGraph* graph_;
DISALLOW_COPY_AND_ASSIGN(HGraphBuilder);
};
} // namespace art
#endif // ART_COMPILER_OPTIMIZING_BUILDER_H_
|
