| // 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.library; |
| |
| import com.android.tools.r8.graph.AppView; |
| import com.android.tools.r8.graph.DexClassAndMethod; |
| import com.android.tools.r8.graph.DexItemFactory; |
| import com.android.tools.r8.graph.DexType; |
| import com.android.tools.r8.ir.code.IRCode; |
| import com.android.tools.r8.ir.code.InstructionListIterator; |
| import com.android.tools.r8.ir.code.InvokeMethod; |
| import com.android.tools.r8.ir.code.Value; |
| import java.util.Set; |
| |
| public class ObjectMethodOptimizer extends StatelessLibraryMethodModelCollection { |
| |
| private final DexItemFactory dexItemFactory; |
| |
| ObjectMethodOptimizer(AppView<?> appView) { |
| this.dexItemFactory = appView.dexItemFactory(); |
| } |
| |
| @Override |
| public DexType getType() { |
| return dexItemFactory.objectType; |
| } |
| |
| @Override |
| public void optimize( |
| IRCode code, |
| InstructionListIterator instructionIterator, |
| InvokeMethod invoke, |
| DexClassAndMethod singleTarget, |
| Set<Value> affectedValues) { |
| if (singleTarget.getReference() == dexItemFactory.objectMembers.getClass) { |
| optimizeGetClass(instructionIterator, invoke); |
| } |
| } |
| |
| private void optimizeGetClass(InstructionListIterator instructionIterator, InvokeMethod invoke) { |
| if ((!invoke.hasOutValue() || !invoke.outValue().hasAnyUsers()) |
| && invoke.inValues().get(0).isNeverNull()) { |
| instructionIterator.removeOrReplaceByDebugLocalRead(); |
| } |
| } |
| } |