| // 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.horizontalclassmerging.policies; |
| |
| import com.android.tools.r8.graph.AppView; |
| import com.android.tools.r8.graph.DexProgramClass; |
| import com.android.tools.r8.horizontalclassmerging.HorizontalClassMerger.Mode; |
| import com.android.tools.r8.horizontalclassmerging.SingleClassPolicy; |
| import com.android.tools.r8.shaking.AppInfoWithLiveness; |
| |
| public class NoVerticallyMergedClasses extends SingleClassPolicy { |
| private final AppView<AppInfoWithLiveness> appView; |
| |
| public NoVerticallyMergedClasses(AppView<AppInfoWithLiveness> appView, Mode mode) { |
| // This policy is only relevant for the initial round, since all vertically merged classes have |
| // been removed from the application in the final round of horizontal class merging. |
| assert mode.isInitial(); |
| this.appView = appView; |
| } |
| |
| @Override |
| public boolean canMerge(DexProgramClass program) { |
| if (appView.verticallyMergedClasses() == null) { |
| return true; |
| } |
| return !appView.verticallyMergedClasses().hasBeenMergedIntoSubtype(program.type); |
| } |
| |
| @Override |
| public String getName() { |
| return "NotVerticallyMergedIntoSubtype"; |
| } |
| } |