| // 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.graph.AppView; |
| import com.android.tools.r8.ir.analysis.value.AbstractValue; |
| import com.android.tools.r8.shaking.AppInfoWithLiveness; |
| |
| /** |
| * The information that we track for fields with an array type. |
| * |
| * <p>Since we don't gain much from tracking the dynamic types of arrays, this is only tracking the |
| * abstract value. |
| */ |
| public class ConcreteArrayTypeFieldState extends ConcreteReferenceTypeFieldState { |
| |
| ConcreteArrayTypeFieldState(AbstractValue abstractValue) { |
| super(abstractValue); |
| } |
| |
| public static FieldState create(AbstractValue abstractValue) { |
| return abstractValue.isUnknown() |
| ? FieldState.unknown() |
| : new ConcreteArrayTypeFieldState(abstractValue); |
| } |
| |
| @Override |
| public boolean isArray() { |
| return true; |
| } |
| |
| @Override |
| public ConcreteArrayTypeFieldState asArray() { |
| return this; |
| } |
| |
| public FieldState mutableJoin(AppView<AppInfoWithLiveness> appView, AbstractValue abstractValue) { |
| this.abstractValue = |
| this.abstractValue.joinReference(abstractValue, appView.abstractValueFactory()); |
| return isEffectivelyUnknown() ? unknown() : this; |
| } |
| |
| private boolean isEffectivelyUnknown() { |
| return abstractValue.isUnknown(); |
| } |
| } |