| // 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.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.DexClassAndMethod; |
| import com.android.tools.r8.graph.DexItemFactory; |
| import com.android.tools.r8.graph.DexMethod; |
| 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.graph.UseRegistry; |
| 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 java.util.ListIterator; |
| import org.objectweb.asm.MethodVisitor; |
| import org.objectweb.asm.Type; |
| |
| public class CfConstClass extends CfInstruction implements CfTypeInstruction { |
| |
| private final DexType type; |
| private final boolean ignoreCompatRules; |
| |
| public CfConstClass(DexType type) { |
| this(type, false); |
| } |
| |
| public CfConstClass(DexType type, boolean ignoreCompatRules) { |
| // Primitive types and void should be retrieved using, for example, java.lang.Integer.TYPE. |
| assert !type.isPrimitiveType(); |
| assert !type.isVoidType(); |
| this.type = type; |
| this.ignoreCompatRules = ignoreCompatRules; |
| } |
| |
| public boolean ignoreCompatRules() { |
| return ignoreCompatRules; |
| } |
| |
| @Override |
| public int getCompareToId() { |
| return CfCompareHelper.CONST_CLASS_COMPARE_ID; |
| } |
| |
| @Override |
| public int internalAcceptCompareTo( |
| CfInstruction other, CompareToVisitor visitor, CfCompareHelper helper) { |
| return type.acceptCompareTo(((CfConstClass) other).type, visitor); |
| } |
| |
| @Override |
| public CfTypeInstruction asTypeInstruction() { |
| return this; |
| } |
| |
| @Override |
| public boolean isTypeInstruction() { |
| return true; |
| } |
| |
| @Override |
| public DexType getType() { |
| return type; |
| } |
| |
| @Override |
| public CfInstruction withType(DexType newType) { |
| return new CfConstClass(newType); |
| } |
| |
| @Override |
| public void write( |
| AppView<?> appView, |
| ProgramMethod context, |
| DexItemFactory dexItemFactory, |
| GraphLens graphLens, |
| InitClassLens initClassLens, |
| NamingLens namingLens, |
| LensCodeRewriterUtils rewriter, |
| MethodVisitor visitor) { |
| visitor.visitLdcInsn(Type.getObjectType(getInternalName(graphLens, namingLens))); |
| } |
| |
| @Override |
| public int bytecodeSizeUpperBound() { |
| // ldc or ldc_w |
| return 3; |
| } |
| |
| @Override |
| public void print(CfPrinter printer) { |
| printer.print(this); |
| } |
| |
| @Override |
| public boolean canThrow() { |
| return true; |
| } |
| |
| private String getInternalName(GraphLens graphLens, NamingLens namingLens) { |
| DexType rewrittenType = graphLens.lookupType(type); |
| switch (rewrittenType.toShorty()) { |
| case '[': |
| case 'L': |
| return namingLens.lookupInternalName(rewrittenType); |
| default: |
| throw new Unreachable("Unexpected type in const-class: " + rewrittenType); |
| } |
| } |
| |
| @Override |
| void internalRegisterUse( |
| UseRegistry<?> registry, DexClassAndMethod context, ListIterator<CfInstruction> iterator) { |
| registry.registerConstClass(type, iterator, ignoreCompatRules()); |
| } |
| |
| @Override |
| public void buildIR(IRBuilder builder, CfState state, CfSourceCode code) { |
| builder.addConstClass(state.push(builder.appView.dexItemFactory().classType).register, type); |
| } |
| |
| @Override |
| public ConstraintWithTarget inliningConstraint( |
| InliningConstraints inliningConstraints, CfCode code, ProgramMethod context) { |
| return inliningConstraints.forConstClass(type, context); |
| } |
| |
| @Override |
| public void evaluate( |
| CfFrameVerificationHelper frameBuilder, |
| DexMethod context, |
| AppView<?> appView, |
| DexItemFactory dexItemFactory) { |
| // ... → |
| // ..., value |
| frameBuilder.push(dexItemFactory.classType); |
| } |
| } |