| // 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.DexType; |
| import com.android.tools.r8.ir.analysis.type.DynamicType; |
| import com.android.tools.r8.ir.analysis.value.AbstractValue; |
| import com.android.tools.r8.optimize.argumentpropagation.utils.WideningUtils; |
| import com.android.tools.r8.shaking.AppInfoWithLiveness; |
| import com.android.tools.r8.utils.Action; |
| |
| public class BottomClassTypeValueState extends BottomValueState { |
| |
| private static final BottomClassTypeValueState INSTANCE = new BottomClassTypeValueState(); |
| |
| private BottomClassTypeValueState() {} |
| |
| public static BottomClassTypeValueState get() { |
| return INSTANCE; |
| } |
| |
| @Override |
| public ValueState mutableJoin( |
| AppView<AppInfoWithLiveness> appView, |
| ValueState state, |
| DexType staticType, |
| StateCloner cloner, |
| Action onChangedAction) { |
| if (state.isBottom()) { |
| return this; |
| } |
| if (state.isUnknown()) { |
| return state; |
| } |
| assert state.isConcrete(); |
| assert state.asConcrete().isReferenceState(); |
| ConcreteReferenceTypeValueState concreteState = state.asConcrete().asReferenceState(); |
| AbstractValue abstractValue = concreteState.getAbstractValue(appView); |
| DynamicType dynamicType = concreteState.getDynamicType(); |
| DynamicType widenedDynamicType = |
| WideningUtils.widenDynamicNonReceiverType(appView, dynamicType, staticType); |
| if (concreteState.isClassState() && !widenedDynamicType.isUnknown()) { |
| return cloner.mutableCopy(concreteState); |
| } |
| return abstractValue.isUnknown() && widenedDynamicType.isUnknown() |
| ? unknown() |
| : new ConcreteClassTypeValueState( |
| abstractValue, widenedDynamicType, concreteState.copyInFlow()); |
| } |
| } |