| // Copyright (c) 2018, 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.code; |
| |
| import com.android.tools.r8.cf.LoadStoreHelper; |
| import com.android.tools.r8.errors.Unreachable; |
| import com.android.tools.r8.graph.DexType; |
| import com.android.tools.r8.ir.conversion.CfBuilder; |
| import com.android.tools.r8.ir.conversion.DexBuilder; |
| import com.android.tools.r8.ir.optimize.Inliner.Constraint; |
| import com.android.tools.r8.ir.optimize.InliningConstraints; |
| import com.android.tools.r8.utils.InternalOptions; |
| |
| public class AlwaysMaterializingUser extends Instruction { |
| |
| public AlwaysMaterializingUser(Value src) { |
| super(null, src); |
| // The user instruction never materializes so ensure it has position none. |
| setPosition(Position.none()); |
| } |
| |
| @Override |
| public boolean canBeDeadCode(IRCode code, InternalOptions options) { |
| // This instruction may never be considered dead as it must remain. |
| return false; |
| } |
| |
| @Override |
| public void buildDex(DexBuilder builder) { |
| builder.addNop(this); |
| } |
| |
| @Override |
| public void buildCf(CfBuilder builder) { |
| throw new Unreachable(); |
| } |
| |
| @Override |
| public boolean identicalNonValueNonPositionParts(Instruction other) { |
| return false; |
| } |
| |
| @Override |
| public int compareNonValueParts(Instruction other) { |
| return 0; |
| } |
| |
| @Override |
| public int maxInValueRegister() { |
| assert inValues.get(0).definition instanceof AlwaysMaterializingDefinition; |
| return inValues.get(0).definition.maxOutValueRegister(); |
| } |
| |
| @Override |
| public int maxOutValueRegister() { |
| throw new Unreachable(); |
| } |
| |
| @Override |
| public Constraint inliningConstraint( |
| InliningConstraints inliningConstraints, DexType invocationContext) { |
| return inliningConstraints.forAlwaysMaterializingUser(); |
| } |
| |
| @Override |
| public void insertLoadAndStores(InstructionListIterator it, LoadStoreHelper helper) { |
| throw new Unreachable(); |
| } |
| } |