| // Copyright (c) 2020, 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.analysis.value; |
| |
| import com.android.tools.r8.graph.AppView; |
| import com.android.tools.r8.graph.GraphLens; |
| import com.android.tools.r8.shaking.AppInfoWithLiveness; |
| |
| public class BottomValue extends AbstractValue { |
| |
| private static final BottomValue INSTANCE = new BottomValue(); |
| |
| private BottomValue() {} |
| |
| public static BottomValue getInstance() { |
| return INSTANCE; |
| } |
| |
| @Override |
| public boolean isBottom() { |
| return true; |
| } |
| |
| @Override |
| public AbstractValue rewrittenWithLens(AppView<AppInfoWithLiveness> appView, GraphLens lens) { |
| return this; |
| } |
| |
| @Override |
| public boolean isNonTrivial() { |
| return true; |
| } |
| |
| @Override |
| public boolean equals(Object o) { |
| return this == o; |
| } |
| |
| @Override |
| public int hashCode() { |
| return System.identityHashCode(this); |
| } |
| |
| @Override |
| public String toString() { |
| return "BottomValue"; |
| } |
| } |