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// 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.CfCode;
import com.android.tools.r8.graph.CfCompareHelper;
import com.android.tools.r8.graph.DexItemFactory;
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 com.android.tools.r8.utils.structural.CompareToVisitor;
import org.objectweb.asm.MethodVisitor;
import org.objectweb.asm.Opcodes;
public class CfGoto extends CfInstruction {
private final CfLabel target;
public CfGoto(CfLabel target) {
this.target = target;
}
@Override
public int getCompareToId() {
return Opcodes.GOTO;
}
@Override
public int internalAcceptCompareTo(
CfInstruction other, CompareToVisitor visitor, CfCompareHelper helper) {
return helper.compareLabels(target, ((CfGoto) other).target, visitor);
}
@Override
public CfGoto asGoto() {
return this;
}
@Override
public boolean isGoto() {
return true;
}
@Override
public boolean isJump() {
return true;
}
@Override
public CfLabel getTarget() {
return target;
}
@Override
public void write(
AppView<?> appView,
ProgramMethod context,
DexItemFactory dexItemFactory,
GraphLens graphLens,
InitClassLens initClassLens,
NamingLens namingLens,
LensCodeRewriterUtils rewriter,
MethodVisitor visitor) {
visitor.visitJumpInsn(Opcodes.GOTO, target.getLabel());
}
@Override
public void print(CfPrinter printer) {
printer.print(this);
}
@Override
public void buildIR(IRBuilder builder, CfState state, CfSourceCode code) {
builder.addGoto(code.getLabelOffset(target));
}
@Override
public ConstraintWithTarget inliningConstraint(
InliningConstraints inliningConstraints, CfCode code, ProgramMethod context) {
return inliningConstraints.forJumpInstruction();
}
@Override
public void evaluate(
CfFrameVerificationHelper frameBuilder,
DexType context,
DexType returnType,
DexItemFactory factory,
InitClassLens initClassLens) {
frameBuilder.checkTarget(target);
frameBuilder.setNoFrame();
}
}