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/*
* 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 "base/arena_containers.h"
#include "nodes.h"
#include "optimization.h"
namespace art {
class SideEffectsAnalysis : public HOptimization {
public:
explicit SideEffectsAnalysis(HGraph* graph, const char* pass_name = kSideEffectsAnalysisPassName)
: HOptimization(graph, pass_name),
graph_(graph),
block_effects_(graph->GetBlocks().size(),
graph->GetAllocator()->Adapter(kArenaAllocSideEffectsAnalysis)),
loop_effects_(graph->GetBlocks().size(),
graph->GetAllocator()->Adapter(kArenaAllocSideEffectsAnalysis)) {}
SideEffects GetLoopEffects(HBasicBlock* block) const;
SideEffects GetBlockEffects(HBasicBlock* block) const;
// Compute side effects of individual blocks and loops.
bool Run();
bool HasRun() const { return has_run_; }
static constexpr const char* kSideEffectsAnalysisPassName = "side_effects";
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.
ArenaVector<SideEffects> block_effects_;
// Side effects of loops, that is the union of the side effects of the
// blocks contained in that loop.
ArenaVector<SideEffects> loop_effects_;
ART_FRIEND_TEST(GVNTest, LoopSideEffects);
DISALLOW_COPY_AND_ASSIGN(SideEffectsAnalysis);
};
} // namespace art
#endif // ART_COMPILER_OPTIMIZING_SIDE_EFFECTS_ANALYSIS_H_
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