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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_SSA_TYPE_PROPAGATION_H_
#define ART_COMPILER_OPTIMIZING_SSA_TYPE_PROPAGATION_H_
#include "nodes.h"
namespace art {
// Compute and propagate types of phis in the graph.
class SsaTypePropagation : public ValueObject {
public:
explicit SsaTypePropagation(HGraph* graph)
: graph_(graph), worklist_(graph->GetArena(), kDefaultWorklistSize) {}
void Run();
private:
void VisitBasicBlock(HBasicBlock* block);
void ProcessWorklist();
void AddToWorklist(HPhi* phi);
void AddDependentInstructionsToWorklist(HPhi* phi);
HGraph* const graph_;
GrowableArray<HPhi*> worklist_;
static constexpr size_t kDefaultWorklistSize = 8;
DISALLOW_COPY_AND_ASSIGN(SsaTypePropagation);
};
} // namespace art
#endif // ART_COMPILER_OPTIMIZING_SSA_TYPE_PROPAGATION_H_
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