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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_INSTRUCTION_SIMPLIFIER_H_
#define ART_COMPILER_OPTIMIZING_INSTRUCTION_SIMPLIFIER_H_
#include "nodes.h"
#include "optimization.h"
#include "optimizing_compiler_stats.h"
namespace art {
class CodeGenerator;
/**
* Implements optimizations specific to each instruction.
*
* Note that graph simplifications producing a constant should be
* implemented in art::HConstantFolding, while graph simplifications
* not producing constants should be implemented in
* art::InstructionSimplifier. (This convention is a choice that was
* made during the development of these parts of the compiler and is
* not bound by any technical requirement.)
*/
class InstructionSimplifier : public HOptimization {
public:
InstructionSimplifier(HGraph* graph,
CodeGenerator* codegen,
OptimizingCompilerStats* stats = nullptr,
const char* name = kInstructionSimplifierPassName,
bool use_all_optimizations = false)
: HOptimization(graph, name, stats),
codegen_(codegen),
use_all_optimizations_(use_all_optimizations) {}
static constexpr const char* kInstructionSimplifierPassName = "instruction_simplifier";
bool Run() override;
private:
CodeGenerator* codegen_;
// Use all optimizations without restrictions.
bool use_all_optimizations_;
DISALLOW_COPY_AND_ASSIGN(InstructionSimplifier);
};
} // namespace art
#endif // ART_COMPILER_OPTIMIZING_INSTRUCTION_SIMPLIFIER_H_
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