| // 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.ir.desugar.backports; |
| |
| import com.android.tools.r8.graph.DexItemFactory; |
| import com.android.tools.r8.graph.DexMethod; |
| import com.android.tools.r8.ir.code.InstructionListIterator; |
| import com.android.tools.r8.ir.code.InvokeMethod; |
| import com.android.tools.r8.ir.code.InvokeStatic; |
| import com.android.tools.r8.ir.code.Value; |
| import java.util.Collections; |
| import java.util.Set; |
| |
| public final class CollectionMethodRewrites { |
| |
| private CollectionMethodRewrites() {} |
| |
| public static void rewriteListOfEmpty( |
| InvokeMethod invoke, |
| InstructionListIterator iterator, |
| DexItemFactory factory, |
| Set<Value> affectedValues) { |
| rewriteToCollectionMethod(invoke, iterator, factory, "emptyList"); |
| } |
| |
| public static void rewriteSetOfEmpty( |
| InvokeMethod invoke, |
| InstructionListIterator iterator, |
| DexItemFactory factory, |
| Set<Value> affectedValues) { |
| rewriteToCollectionMethod(invoke, iterator, factory, "emptySet"); |
| } |
| |
| public static void rewriteMapOfEmpty( |
| InvokeMethod invoke, |
| InstructionListIterator iterator, |
| DexItemFactory factory, |
| Set<Value> affectedValues) { |
| rewriteToCollectionMethod(invoke, iterator, factory, "emptyMap"); |
| } |
| |
| private static void rewriteToCollectionMethod(InvokeMethod invoke, |
| InstructionListIterator iterator, DexItemFactory factory, String methodName) { |
| assert invoke.inValues().isEmpty(); |
| |
| DexMethod collectionsEmptyList = |
| factory.createMethod(factory.collectionsType, invoke.getInvokedMethod().proto, methodName); |
| InvokeStatic newInvoke = |
| new InvokeStatic(collectionsEmptyList, invoke.outValue(), Collections.emptyList()); |
| iterator.replaceCurrentInstruction(newInvoke); |
| } |
| } |