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151 lines
4.7 KiB
151 lines
4.7 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_OPTIMIZATION_H_
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#define ART_COMPILER_OPTIMIZING_OPTIMIZATION_H_
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#include "base/arena_object.h"
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#include "nodes.h"
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#include "optimizing_compiler_stats.h"
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namespace art {
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class CodeGenerator;
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class DexCompilationUnit;
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/**
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* Abstraction to implement an optimization pass.
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*/
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class HOptimization : public ArenaObject<kArenaAllocOptimization> {
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public:
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HOptimization(HGraph* graph,
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const char* pass_name,
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OptimizingCompilerStats* stats = nullptr)
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: graph_(graph),
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stats_(stats),
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pass_name_(pass_name) {}
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virtual ~HOptimization() {}
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// Return the name of the pass. Pass names for a single HOptimization should be of form
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// <optimization_name> or <optimization_name>$<pass_name> for common <optimization_name> prefix.
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// Example: 'instruction_simplifier', 'instruction_simplifier$after_bce',
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// 'instruction_simplifier$before_codegen'.
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const char* GetPassName() const { return pass_name_; }
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// Perform the pass or analysis. Returns false if no optimizations occurred or no useful
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// information was computed (this is best effort, returning true is always ok).
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virtual bool Run() = 0;
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protected:
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HGraph* const graph_;
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// Used to record stats about the optimization.
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OptimizingCompilerStats* const stats_;
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private:
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// Optimization pass name.
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const char* pass_name_;
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DISALLOW_COPY_AND_ASSIGN(HOptimization);
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};
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// Optimization passes that can be constructed by the helper method below. An enum
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// field is preferred over a string lookup at places where performance matters.
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// TODO: generate this table and lookup methods below automatically?
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enum class OptimizationPass {
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kAggressiveInstructionSimplifier,
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kBoundsCheckElimination,
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kCHAGuardOptimization,
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kCodeSinking,
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kConstantFolding,
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kConstructorFenceRedundancyElimination,
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kDeadCodeElimination,
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kGlobalValueNumbering,
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kInductionVarAnalysis,
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kInliner,
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kInstructionSimplifier,
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kInvariantCodeMotion,
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kLoadStoreElimination,
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kLoopOptimization,
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kScheduling,
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kSelectGenerator,
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kSideEffectsAnalysis,
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#ifdef ART_ENABLE_CODEGEN_arm
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kInstructionSimplifierArm,
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kCriticalNativeAbiFixupArm,
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#endif
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#ifdef ART_ENABLE_CODEGEN_arm64
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kInstructionSimplifierArm64,
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#endif
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#ifdef ART_ENABLE_CODEGEN_x86
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kPcRelativeFixupsX86,
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kInstructionSimplifierX86,
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#endif
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#ifdef ART_ENABLE_CODEGEN_x86_64
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kInstructionSimplifierX86_64,
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#endif
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#if defined(ART_ENABLE_CODEGEN_x86) || defined(ART_ENABLE_CODEGEN_x86_64)
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kX86MemoryOperandGeneration,
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#endif
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kNone,
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kLast = kNone
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};
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// Lookup name of optimization pass.
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const char* OptimizationPassName(OptimizationPass pass);
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// Lookup optimization pass by name.
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OptimizationPass OptimizationPassByName(const std::string& pass_name);
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// Optimization definition consisting of an optimization pass
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// an optional alternative name (nullptr denotes default), and
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// an optional pass dependence (kNone denotes no dependence).
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struct OptimizationDef {
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OptimizationDef(OptimizationPass p, const char* pn, OptimizationPass d)
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: pass(p), pass_name(pn), depends_on(d) {}
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OptimizationPass pass;
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const char* pass_name;
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OptimizationPass depends_on;
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};
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// Helper method for optimization definition array entries.
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inline OptimizationDef OptDef(OptimizationPass pass,
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const char* pass_name = nullptr,
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OptimizationPass depends_on = OptimizationPass::kNone) {
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return OptimizationDef(pass, pass_name, depends_on);
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}
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// Helper method to construct series of optimization passes.
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// The array should consist of the requested optimizations
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// and optional alternative names for repeated passes.
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// Example:
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// { OptPass(kConstantFolding),
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// OptPass(Inliner),
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// OptPass(kConstantFolding, "constant_folding$after_inlining")
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// }
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ArenaVector<HOptimization*> ConstructOptimizations(
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const OptimizationDef definitions[],
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size_t length,
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ArenaAllocator* allocator,
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HGraph* graph,
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OptimizingCompilerStats* stats,
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CodeGenerator* codegen,
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const DexCompilationUnit& dex_compilation_unit);
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} // namespace art
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#endif // ART_COMPILER_OPTIMIZING_OPTIMIZATION_H_
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