Shalini Salomi Bodapati | dd121f6 | 2018-10-26 15:03:53 +0530 | [diff] [blame] | 1 | /* Copyright (C) 2018 The Android Open Source Project |
| 2 | * |
| 3 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 4 | * you may not use this file except in compliance with the License. |
| 5 | * You may obtain a copy of the License at |
| 6 | * |
| 7 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 8 | * |
| 9 | * Unless required by applicable law or agreed to in writing, software |
| 10 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 11 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 12 | * See the License for the specific language governing permissions and |
| 13 | * limitations under the License. |
| 14 | */ |
| 15 | |
| 16 | #include "instruction_simplifier_x86.h" |
| 17 | #include "instruction_simplifier_x86_shared.h" |
| 18 | #include "code_generator_x86.h" |
| 19 | |
Vladimir Marko | 0a51605 | 2019-10-14 13:00:44 +0000 | [diff] [blame] | 20 | namespace art { |
Shalini Salomi Bodapati | dd121f6 | 2018-10-26 15:03:53 +0530 | [diff] [blame] | 21 | |
| 22 | namespace x86 { |
| 23 | |
| 24 | class InstructionSimplifierX86Visitor : public HGraphVisitor { |
| 25 | public: |
| 26 | InstructionSimplifierX86Visitor(HGraph* graph, |
| 27 | CodeGenerator* codegen, |
| 28 | OptimizingCompilerStats* stats) |
| 29 | : HGraphVisitor(graph), |
| 30 | codegen_(down_cast<CodeGeneratorX86*>(codegen)), |
| 31 | stats_(stats) {} |
| 32 | |
| 33 | void RecordSimplification() { |
| 34 | MaybeRecordStat(stats_, MethodCompilationStat::kInstructionSimplificationsArch); |
| 35 | } |
| 36 | |
| 37 | bool HasAVX2() { |
| 38 | return (codegen_->GetInstructionSetFeatures().HasAVX2()); |
| 39 | } |
| 40 | |
| 41 | void VisitBasicBlock(HBasicBlock* block) override { |
| 42 | for (HInstructionIterator it(block->GetInstructions()); !it.Done(); it.Advance()) { |
| 43 | HInstruction* instruction = it.Current(); |
| 44 | if (instruction->IsInBlock()) { |
| 45 | instruction->Accept(this); |
| 46 | } |
| 47 | } |
| 48 | } |
| 49 | |
| 50 | void VisitAnd(HAnd * instruction) override; |
| 51 | void VisitXor(HXor* instruction) override; |
| 52 | |
| 53 | private: |
| 54 | CodeGeneratorX86* codegen_; |
| 55 | OptimizingCompilerStats* stats_; |
| 56 | }; |
| 57 | |
| 58 | |
| 59 | void InstructionSimplifierX86Visitor::VisitAnd(HAnd* instruction) { |
| 60 | if (TryCombineAndNot(instruction)) { |
| 61 | RecordSimplification(); |
| 62 | } else if (instruction->GetResultType() == DataType::Type::kInt32) { |
| 63 | if (TryGenerateResetLeastSetBit(instruction)) { |
| 64 | RecordSimplification(); |
| 65 | } |
| 66 | } |
| 67 | } |
| 68 | |
| 69 | void InstructionSimplifierX86Visitor::VisitXor(HXor* instruction) { |
| 70 | if (instruction->GetResultType() == DataType::Type::kInt32) { |
| 71 | if (TryGenerateMaskUptoLeastSetBit(instruction)) { |
| 72 | RecordSimplification(); |
| 73 | } |
| 74 | } |
| 75 | } |
| 76 | |
| 77 | bool InstructionSimplifierX86::Run() { |
| 78 | InstructionSimplifierX86Visitor visitor(graph_, codegen_, stats_); |
| 79 | if (visitor.HasAVX2()) { |
| 80 | visitor.VisitReversePostOrder(); |
| 81 | return true; |
| 82 | } |
| 83 | return false; |
| 84 | } |
| 85 | |
| 86 | } // namespace x86 |
| 87 | } // namespace art |
| 88 | |