| // 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.errors.Unreachable; |
| 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.code.ValueType; |
| import com.android.tools.r8.ir.conversion.CfSourceCode; |
| import com.android.tools.r8.ir.conversion.CfState; |
| import com.android.tools.r8.ir.conversion.CfState.Slot; |
| 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 CfReturn extends CfInstruction { |
| |
| private final ValueType type; |
| |
| public CfReturn(ValueType type) { |
| this.type = type; |
| } |
| |
| public ValueType getType() { |
| return type; |
| } |
| |
| @Override |
| public int getCompareToId() { |
| return getOpcode(); |
| } |
| |
| @Override |
| public int internalAcceptCompareTo( |
| CfInstruction other, CompareToVisitor visitor, CfCompareHelper helper) { |
| return CfCompareHelper.compareIdUniquelyDeterminesEquality(this, other); |
| } |
| |
| private int getOpcode() { |
| switch (type) { |
| case INT: |
| return Opcodes.IRETURN; |
| case FLOAT: |
| return Opcodes.FRETURN; |
| case LONG: |
| return Opcodes.LRETURN; |
| case DOUBLE: |
| return Opcodes.DRETURN; |
| case OBJECT: |
| return Opcodes.ARETURN; |
| default: |
| throw new Unreachable("Unexpected return type: " + type); |
| } |
| } |
| |
| @Override |
| public boolean isJump() { |
| return true; |
| } |
| |
| @Override |
| public void write( |
| AppView<?> appView, |
| ProgramMethod context, |
| DexItemFactory dexItemFactory, |
| GraphLens graphLens, |
| InitClassLens initClassLens, |
| NamingLens namingLens, |
| LensCodeRewriterUtils rewriter, |
| MethodVisitor visitor) { |
| visitor.visitInsn(getOpcode()); |
| } |
| |
| @Override |
| public void print(CfPrinter printer) { |
| printer.print(this); |
| } |
| |
| @Override |
| public boolean isReturn() { |
| return true; |
| } |
| |
| @Override |
| public void buildIR(IRBuilder builder, CfState state, CfSourceCode code) { |
| Slot pop = state.pop(); |
| builder.addReturn(pop.register); |
| } |
| |
| @Override |
| public ConstraintWithTarget inliningConstraint( |
| InliningConstraints inliningConstraints, CfCode code, ProgramMethod context) { |
| return inliningConstraints.forReturn(); |
| } |
| |
| @Override |
| public void evaluate( |
| CfFrameVerificationHelper frameBuilder, |
| DexType context, |
| DexType returnType, |
| DexItemFactory factory, |
| InitClassLens initClassLens) { |
| assert returnType != null; |
| frameBuilder.popAndDiscardInitialized(returnType); |
| frameBuilder.setNoFrame(); |
| } |
| } |