| // 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.optimize.argumentpropagation.codescanner; |
| |
| import com.android.tools.r8.graph.AppView; |
| import com.android.tools.r8.graph.DexMethodSignature; |
| import com.android.tools.r8.shaking.AppInfoWithLiveness; |
| import java.util.function.Function; |
| |
| public class BottomMethodState extends MethodStateBase |
| implements ConcreteMonomorphicMethodStateOrBottom, ConcretePolymorphicMethodStateOrBottom { |
| |
| private static final BottomMethodState INSTANCE = new BottomMethodState(); |
| |
| private BottomMethodState() {} |
| |
| public static BottomMethodState get() { |
| return INSTANCE; |
| } |
| |
| @Override |
| public boolean isBottom() { |
| return true; |
| } |
| |
| @Override |
| public ConcreteMonomorphicMethodStateOrBottom asMonomorphicOrBottom() { |
| return this; |
| } |
| |
| @Override |
| public ConcretePolymorphicMethodStateOrBottom asPolymorphicOrBottom() { |
| return this; |
| } |
| |
| @Override |
| public MethodState mutableCopy() { |
| return this; |
| } |
| |
| @Override |
| public MethodState mutableJoin( |
| AppView<AppInfoWithLiveness> appView, |
| DexMethodSignature methodSignature, |
| MethodState methodState, |
| StateCloner cloner) { |
| return methodState.mutableCopy(); |
| } |
| |
| @Override |
| public MethodState mutableJoin( |
| AppView<AppInfoWithLiveness> appView, |
| DexMethodSignature methodSignature, |
| Function<MethodState, MethodState> methodStateSupplier, |
| StateCloner cloner) { |
| return mutableJoin(appView, methodSignature, methodStateSupplier.apply(this), cloner); |
| } |
| } |