/*
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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_PREPARE_FOR_REGISTER_ALLOCATION_H_
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#define ART_COMPILER_OPTIMIZING_PREPARE_FOR_REGISTER_ALLOCATION_H_
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#include "nodes.h"
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namespace art {
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class CompilerOptions;
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class OptimizingCompilerStats;
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/**
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* A simplification pass over the graph before doing register allocation.
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* For example it changes uses of null checks and bounds checks to the original
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* objects, to avoid creating a live range for these checks.
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*/
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class PrepareForRegisterAllocation : public HGraphDelegateVisitor {
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public:
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PrepareForRegisterAllocation(HGraph* graph,
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const CompilerOptions& compiler_options,
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OptimizingCompilerStats* stats = nullptr)
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: HGraphDelegateVisitor(graph, stats),
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compiler_options_(compiler_options) {}
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void Run();
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static constexpr const char* kPrepareForRegisterAllocationPassName =
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"prepare_for_register_allocation";
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private:
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void VisitCheckCast(HCheckCast* check_cast) override;
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void VisitInstanceOf(HInstanceOf* instance_of) override;
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void VisitNullCheck(HNullCheck* check) override;
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void VisitDivZeroCheck(HDivZeroCheck* check) override;
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void VisitBoundsCheck(HBoundsCheck* check) override;
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void VisitBoundType(HBoundType* bound_type) override;
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void VisitArraySet(HArraySet* instruction) override;
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void VisitClinitCheck(HClinitCheck* check) override;
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void VisitCondition(HCondition* condition) override;
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void VisitConstructorFence(HConstructorFence* constructor_fence) override;
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void VisitInvokeStaticOrDirect(HInvokeStaticOrDirect* invoke) override;
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void VisitDeoptimize(HDeoptimize* deoptimize) override;
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void VisitTypeConversion(HTypeConversion* instruction) override;
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bool CanMoveClinitCheck(HInstruction* input, HInstruction* user) const;
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bool CanEmitConditionAt(HCondition* condition, HInstruction* user) const;
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const CompilerOptions& compiler_options_;
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DISALLOW_COPY_AND_ASSIGN(PrepareForRegisterAllocation);
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};
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} // namespace art
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#endif // ART_COMPILER_OPTIMIZING_PREPARE_FOR_REGISTER_ALLOCATION_H_
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