| // 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.optimize.info.field; |
| |
| import com.android.tools.r8.graph.AppView; |
| import com.android.tools.r8.graph.DexDefinitionSupplier; |
| import com.android.tools.r8.graph.DexEncodedField; |
| import com.android.tools.r8.graph.DexField; |
| import com.android.tools.r8.graph.GraphLense; |
| import com.android.tools.r8.shaking.AppInfoWithLiveness; |
| import java.util.IdentityHashMap; |
| import java.util.Map; |
| import java.util.function.BiConsumer; |
| |
| /** |
| * A mapping from instance fields of a class to information about how a particular constructor |
| * initializes these instance fields. |
| * |
| * <p>Returns {@link UnknownInstanceFieldInitializationInfo} if no information is known about the |
| * initialization of a given instance field. |
| */ |
| public abstract class InstanceFieldInitializationInfoCollection { |
| |
| public static Builder builder() { |
| return new Builder(); |
| } |
| |
| public abstract void forEach( |
| DexDefinitionSupplier definitions, |
| BiConsumer<DexEncodedField, InstanceFieldInitializationInfo> consumer); |
| |
| public abstract InstanceFieldInitializationInfo get(DexEncodedField field); |
| |
| public abstract boolean isEmpty(); |
| |
| public abstract InstanceFieldInitializationInfoCollection rewrittenWithLens( |
| AppView<AppInfoWithLiveness> appView, GraphLense lens); |
| |
| public static class Builder { |
| |
| Map<DexField, InstanceFieldInitializationInfo> infos = new IdentityHashMap<>(); |
| |
| public void recordInitializationInfo( |
| DexEncodedField field, InstanceFieldInitializationInfo info) { |
| recordInitializationInfo(field.field, info); |
| } |
| |
| public void recordInitializationInfo(DexField field, InstanceFieldInitializationInfo info) { |
| assert !infos.containsKey(field); |
| infos.put(field, info); |
| } |
| |
| public InstanceFieldInitializationInfoCollection build() { |
| if (infos.isEmpty()) { |
| return EmptyInstanceFieldInitializationInfoCollection.getInstance(); |
| } |
| return new NonTrivialInstanceFieldInitializationInfoCollection(infos); |
| } |
| } |
| } |