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55 lines
1.8 KiB
55 lines
1.8 KiB
/*
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* Copyright (C) 2014 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef ART_COMPILER_OPTIMIZING_CONSTANT_FOLDING_H_
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#define ART_COMPILER_OPTIMIZING_CONSTANT_FOLDING_H_
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#include "nodes.h"
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#include "optimization.h"
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namespace art {
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/**
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* Optimization pass performing a simple constant-expression
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* evaluation on the SSA form.
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*
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* Note that graph simplifications producing a constant should be
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* implemented in art::HConstantFolding, while graph simplifications
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* not producing constants should be implemented in
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* art::InstructionSimplifier. (This convention is a choice that was
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* made during the development of these parts of the compiler and is
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* not bound by any technical requirement.)
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*
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* This class is named art::HConstantFolding to avoid name
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* clashes with the art::ConstantPropagation class defined in
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* compiler/dex/post_opt_passes.h.
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*/
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class HConstantFolding : public HOptimization {
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public:
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HConstantFolding(HGraph* graph, const char* name) : HOptimization(graph, name) {}
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bool Run() override;
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static constexpr const char* kConstantFoldingPassName = "constant_folding";
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private:
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DISALLOW_COPY_AND_ASSIGN(HConstantFolding);
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};
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} // namespace art
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#endif // ART_COMPILER_OPTIMIZING_CONSTANT_FOLDING_H_
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