/* Copyright (C) 2018 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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#include "instruction_simplifier_x86.h"
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#include "instruction_simplifier_x86_shared.h"
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#include "code_generator_x86.h"
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namespace art {
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namespace x86 {
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class InstructionSimplifierX86Visitor : public HGraphVisitor {
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public:
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InstructionSimplifierX86Visitor(HGraph* graph,
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CodeGenerator* codegen,
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OptimizingCompilerStats* stats)
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: HGraphVisitor(graph),
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codegen_(down_cast<CodeGeneratorX86*>(codegen)),
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stats_(stats) {}
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void RecordSimplification() {
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MaybeRecordStat(stats_, MethodCompilationStat::kInstructionSimplificationsArch);
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}
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bool HasAVX2() {
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return (codegen_->GetInstructionSetFeatures().HasAVX2());
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}
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void VisitBasicBlock(HBasicBlock* block) override {
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for (HInstructionIterator it(block->GetInstructions()); !it.Done(); it.Advance()) {
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HInstruction* instruction = it.Current();
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if (instruction->IsInBlock()) {
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instruction->Accept(this);
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}
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}
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}
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void VisitAnd(HAnd * instruction) override;
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void VisitXor(HXor* instruction) override;
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private:
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CodeGeneratorX86* codegen_;
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OptimizingCompilerStats* stats_;
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};
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void InstructionSimplifierX86Visitor::VisitAnd(HAnd* instruction) {
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if (TryCombineAndNot(instruction)) {
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RecordSimplification();
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} else if (instruction->GetResultType() == DataType::Type::kInt32) {
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if (TryGenerateResetLeastSetBit(instruction)) {
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RecordSimplification();
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}
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}
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}
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void InstructionSimplifierX86Visitor::VisitXor(HXor* instruction) {
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if (instruction->GetResultType() == DataType::Type::kInt32) {
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if (TryGenerateMaskUptoLeastSetBit(instruction)) {
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RecordSimplification();
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}
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}
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}
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bool InstructionSimplifierX86::Run() {
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InstructionSimplifierX86Visitor visitor(graph_, codegen_, stats_);
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if (visitor.HasAVX2()) {
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visitor.VisitReversePostOrder();
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return true;
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}
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return false;
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}
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} // namespace x86
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} // namespace art
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