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
|
/*
* 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_SIDE_EFFECTS_ANALYSIS_H_
#define ART_COMPILER_OPTIMIZING_SIDE_EFFECTS_ANALYSIS_H_
#include "nodes.h"
#include "optimization.h"
namespace art {
class SideEffectsAnalysis : public HOptimization {
public:
explicit SideEffectsAnalysis(HGraph* graph)
: HOptimization(graph, true, "SideEffects"),
graph_(graph),
block_effects_(graph->GetArena(), graph->GetBlocks().Size(), SideEffects::None()),
loop_effects_(graph->GetArena(), graph->GetBlocks().Size(), SideEffects::None()) {}
SideEffects GetLoopEffects(HBasicBlock* block) const;
SideEffects GetBlockEffects(HBasicBlock* block) const;
// Compute side effects of individual blocks and loops.
void Run();
bool HasRun() const { return has_run_; }
private:
void UpdateLoopEffects(HLoopInformation* info, SideEffects effects);
HGraph* graph_;
// Checked in debug build, to ensure the pass has been run prior to
// running a pass that depends on it.
bool has_run_ = false;
// Side effects of individual blocks, that is the union of the side effects
// of the instructions in the block.
GrowableArray<SideEffects> block_effects_;
// Side effects of loops, that is the union of the side effects of the
// blocks contained in that loop.
GrowableArray<SideEffects> loop_effects_;
ART_FRIEND_TEST(GVNTest, LoopSideEffects);
DISALLOW_COPY_AND_ASSIGN(SideEffectsAnalysis);
};
} // namespace art
#endif // ART_COMPILER_OPTIMIZING_SIDE_EFFECTS_ANALYSIS_H_
|
