| // Copyright (c) 2021, the R8 project authors. Please see the AUTHORS file |
| // for details. All rights reserved. Use of this source code is governed by a |
| // BSD-style license that can be found in the LICENSE file. |
| |
| package com.android.tools.r8.ir.optimize.classinliner.analysis; |
| |
| import com.android.tools.r8.graph.AppView; |
| import com.android.tools.r8.graph.ProgramMethod; |
| import com.android.tools.r8.ir.analysis.framework.intraprocedural.DataflowAnalysisResult.SuccessfulDataflowAnalysisResult; |
| import com.android.tools.r8.ir.analysis.framework.intraprocedural.IntraproceduralDataflowAnalysis; |
| import com.android.tools.r8.ir.code.IRCode; |
| import com.android.tools.r8.ir.optimize.classinliner.constraint.ClassInlinerMethodConstraint; |
| import com.android.tools.r8.ir.optimize.classinliner.constraint.ConditionalClassInlinerMethodConstraint; |
| import com.android.tools.r8.shaking.AppInfoWithLiveness; |
| |
| public class ClassInlinerMethodConstraintAnalysis { |
| |
| public static ClassInlinerMethodConstraint analyze( |
| AppView<AppInfoWithLiveness> appView, ProgramMethod method, IRCode code) { |
| if (method.getDefinition().isClassInitializer() |
| || method.getDefinition().getNumberOfArguments() == 0) { |
| return ClassInlinerMethodConstraint.alwaysFalse(); |
| } |
| |
| // Analyze code. |
| IntraproceduralDataflowAnalysis<ParameterUsages> analysis = |
| new IntraproceduralDataflowAnalysis<>( |
| ParameterUsages.bottom(), new TransferFunction(appView, method, code)); |
| SuccessfulDataflowAnalysisResult<ParameterUsages> result = |
| analysis.run(code.entryBlock()).asSuccessfulAnalysisResult(); |
| if (result == null) { |
| return ClassInlinerMethodConstraint.alwaysFalse(); |
| } |
| ParameterUsages usages = result.join().externalize(); |
| if (usages.isBottom()) { |
| return ClassInlinerMethodConstraint.alwaysTrue(); |
| } |
| if (usages.isTop()) { |
| return ClassInlinerMethodConstraint.alwaysFalse(); |
| } |
| return new ConditionalClassInlinerMethodConstraint(usages); |
| } |
| } |