| // 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.analysis.fieldaccess.state; |
| |
| import com.android.tools.r8.ir.analysis.value.AbstractValue; |
| import com.android.tools.r8.ir.analysis.value.AbstractValueFactory; |
| |
| /** Used to represent the state for fields that have never been assigned in the program. */ |
| public class BottomFieldState extends FieldState { |
| |
| private static final BottomFieldState INSTANCE = new BottomFieldState(); |
| |
| private BottomFieldState() {} |
| |
| public static BottomFieldState getInstance() { |
| return INSTANCE; |
| } |
| |
| @Override |
| public AbstractValue getAbstractValue(AbstractValueFactory abstractValueFactory) { |
| return abstractValueFactory.createNullValue(); |
| } |
| |
| @Override |
| public boolean isBottom() { |
| return true; |
| } |
| } |