| // 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.DexReference; |
| 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.naming.dexitembasedstring.NameComputationInfo; |
| import com.android.tools.r8.utils.structural.CompareToVisitor; |
| import java.util.ListIterator; |
| import org.objectweb.asm.MethodVisitor; |
| |
| public class CfDexItemBasedConstString extends CfInstruction { |
| |
| private final DexReference item; |
| private final NameComputationInfo<?> nameComputationInfo; |
| |
| public CfDexItemBasedConstString(DexReference item, NameComputationInfo<?> nameComputationInfo) { |
| this.item = item; |
| this.nameComputationInfo = nameComputationInfo; |
| } |
| |
| @Override |
| public int getCompareToId() { |
| return CfCompareHelper.CONST_STRING_DEX_ITEM_COMPARE_ID; |
| } |
| |
| @Override |
| public int internalAcceptCompareTo( |
| CfInstruction other, CompareToVisitor visitor, CfCompareHelper helper) { |
| return visitor.visitDexReference(item, ((CfDexItemBasedConstString) other).item); |
| } |
| |
| public DexReference getItem() { |
| return item; |
| } |
| |
| public NameComputationInfo<?> getNameComputationInfo() { |
| return nameComputationInfo; |
| } |
| |
| @Override |
| public CfDexItemBasedConstString asDexItemBasedConstString() { |
| return this; |
| } |
| |
| @Override |
| public boolean isDexItemBasedConstString() { |
| return true; |
| } |
| |
| @Override |
| public void write( |
| AppView<?> appView, |
| ProgramMethod context, |
| DexItemFactory dexItemFactory, |
| GraphLens graphLens, |
| InitClassLens initClassLens, |
| NamingLens namingLens, |
| LensCodeRewriterUtils rewriter, |
| MethodVisitor visitor) { |
| throw new Unreachable( |
| "CfDexItemBasedConstString instructions should always be rewritten into CfConstString"); |
| } |
| |
| @Override |
| public int bytecodeSizeUpperBound() { |
| // ldc or ldc_w |
| return 3; |
| } |
| |
| @Override |
| public void print(CfPrinter printer) { |
| printer.print(this); |
| } |
| |
| @Override |
| public boolean canThrow() { |
| // const-string* may throw in dex. (Not in CF, see CfSourceCode.canThrowHelper) |
| return true; |
| } |
| |
| @Override |
| void internalRegisterUse( |
| UseRegistry<?> registry, DexClassAndMethod context, ListIterator<CfInstruction> iterator) { |
| if (nameComputationInfo.needsToRegisterReference()) { |
| assert item.isDexType(); |
| registry.registerTypeReference(item.asDexType()); |
| } |
| } |
| |
| @Override |
| public void buildIR(IRBuilder builder, CfState state, CfSourceCode code) { |
| builder.addDexItemBasedConstString( |
| state.push(builder.appView.dexItemFactory().stringType).register, |
| item, |
| nameComputationInfo); |
| } |
| |
| @Override |
| public ConstraintWithTarget inliningConstraint( |
| InliningConstraints inliningConstraints, CfCode code, ProgramMethod context) { |
| return inliningConstraints.forDexItemBasedConstString(item, context); |
| } |
| |
| @Override |
| public void evaluate( |
| CfFrameVerificationHelper frameBuilder, |
| DexMethod context, |
| AppView<?> appView, |
| DexItemFactory dexItemFactory) { |
| // ... → |
| // ..., value |
| frameBuilder.push(dexItemFactory.stringType); |
| } |
| } |