| // Copyright (c) 2017, 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.cf.code; |
| |
| import com.android.tools.r8.cf.CfPrinter; |
| import com.android.tools.r8.graph.AppView; |
| import com.android.tools.r8.graph.CfCompareHelper; |
| import com.android.tools.r8.graph.DexItemFactory; |
| import com.android.tools.r8.graph.DexProgramClass; |
| import com.android.tools.r8.graph.DexType; |
| import com.android.tools.r8.graph.GraphLens; |
| import com.android.tools.r8.graph.InitClassLens; |
| import com.android.tools.r8.graph.ProgramMethod; |
| import com.android.tools.r8.ir.conversion.CfSourceCode; |
| import com.android.tools.r8.ir.conversion.CfState; |
| import com.android.tools.r8.ir.conversion.IRBuilder; |
| import com.android.tools.r8.ir.conversion.LensCodeRewriterUtils; |
| import com.android.tools.r8.ir.optimize.Inliner.ConstraintWithTarget; |
| import com.android.tools.r8.ir.optimize.InliningConstraints; |
| import com.android.tools.r8.naming.NamingLens; |
| import org.objectweb.asm.Label; |
| import org.objectweb.asm.MethodVisitor; |
| |
| public class CfLabel extends CfInstruction { |
| |
| private Label label = null; |
| |
| public Label getLabel() { |
| if (label == null) { |
| label = new Label(); |
| } |
| return label; |
| } |
| |
| @Override |
| public int getCompareToId() { |
| return CfCompareHelper.LABEL_COMPARE_ID; |
| } |
| |
| @Override |
| public int internalCompareTo(CfInstruction other, CfCompareHelper helper) { |
| return helper.compareLabels(this, other.asLabel()); |
| } |
| |
| @Override |
| public CfLabel asLabel() { |
| return this; |
| } |
| |
| @Override |
| public boolean isLabel() { |
| return true; |
| } |
| |
| @Override |
| public void print(CfPrinter printer) { |
| printer.print(this); |
| } |
| |
| @Override |
| public void write( |
| AppView<?> appView, |
| ProgramMethod context, |
| DexItemFactory dexItemFactory, |
| GraphLens graphLens, |
| InitClassLens initClassLens, |
| NamingLens namingLens, |
| LensCodeRewriterUtils rewriter, |
| MethodVisitor visitor) { |
| visitor.visitLabel(getLabel()); |
| } |
| |
| @Override |
| public void buildIR(IRBuilder builder, CfState state, CfSourceCode code) { |
| // Intentionally left empty. |
| } |
| |
| @Override |
| public boolean emitsIR() { |
| return false; |
| } |
| |
| @Override |
| public ConstraintWithTarget inliningConstraint( |
| InliningConstraints inliningConstraints, DexProgramClass context) { |
| return ConstraintWithTarget.ALWAYS; |
| } |
| |
| @Override |
| public void evaluate( |
| CfFrameVerificationHelper frameBuilder, |
| DexType context, |
| DexType returnType, |
| DexItemFactory factory, |
| InitClassLens initClassLens) { |
| // This is a no-op. |
| } |
| } |