| // Copyright (c) 2019, 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.graph.classmerging; |
| |
| import com.android.tools.r8.graph.AppView; |
| import com.android.tools.r8.graph.DexType; |
| import com.android.tools.r8.ir.optimize.lambda.LambdaGroup; |
| import com.android.tools.r8.shaking.AppInfoWithLiveness; |
| import com.android.tools.r8.utils.collections.BidirectionalManyToOneHashMap; |
| import com.android.tools.r8.utils.collections.BidirectionalManyToOneMap; |
| import com.android.tools.r8.utils.collections.MutableBidirectionalManyToOneMap; |
| import java.util.Collections; |
| import java.util.Map; |
| import java.util.Set; |
| import java.util.function.BiConsumer; |
| |
| public class HorizontallyMergedLambdaClasses implements MergedClasses { |
| |
| private final BidirectionalManyToOneMap<DexType, DexType> mergedClasses; |
| |
| public HorizontallyMergedLambdaClasses(Map<DexType, LambdaGroup> lambdas) { |
| MutableBidirectionalManyToOneMap<DexType, DexType> mergedClasses = |
| new BidirectionalManyToOneHashMap<>(); |
| lambdas.forEach((lambda, group) -> mergedClasses.put(lambda, group.getGroupClassType())); |
| this.mergedClasses = mergedClasses; |
| } |
| |
| public static HorizontallyMergedLambdaClasses empty() { |
| return new HorizontallyMergedLambdaClasses(Collections.emptyMap()); |
| } |
| |
| @Override |
| public void forEachMergeGroup(BiConsumer<Set<DexType>, DexType> consumer) { |
| mergedClasses.forEachManyToOneMapping(consumer); |
| } |
| |
| @Override |
| public boolean hasBeenMergedIntoDifferentType(DexType type) { |
| return mergedClasses.containsKey(type); |
| } |
| |
| @Override |
| public boolean isMergeTarget(DexType type) { |
| return mergedClasses.containsValue(type); |
| } |
| |
| @Override |
| public boolean verifyAllSourcesPruned(AppView<AppInfoWithLiveness> appView) { |
| for (DexType source : mergedClasses.keySet()) { |
| assert appView.appInfo().wasPruned(source) |
| : "Expected horizontally merged lambda class `" |
| + source.toSourceString() |
| + "` to be absent"; |
| } |
| return true; |
| } |
| } |