| // 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.conversion; |
| |
| import com.android.tools.r8.cf.code.CfInstruction; |
| import com.android.tools.r8.cf.code.CfLabel; |
| import java.util.List; |
| |
| public class CfSourceUtils { |
| |
| public static CfLabel ensureLabel(List<CfInstruction> instructions) { |
| CfInstruction last = getLastInstruction(instructions); |
| if (last != null && last.isLabel()) { |
| return last.asLabel(); |
| } |
| CfLabel label = new CfLabel(); |
| instructions.add(label); |
| return label; |
| } |
| |
| private static CfInstruction getLastInstruction(List<CfInstruction> instructions) { |
| return instructions.isEmpty() ? null : instructions.get(instructions.size() - 1); |
| } |
| } |