| // 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.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.ProgramMethod; |
| import com.android.tools.r8.graph.lens.GraphLens; |
| import com.android.tools.r8.graph.lens.InitClassLens; |
| import com.android.tools.r8.ir.code.NumericType; |
| 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.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.optimize.interfaces.analysis.CfAnalysisConfig; |
| import com.android.tools.r8.optimize.interfaces.analysis.CfFrameState; |
| import com.android.tools.r8.utils.FunctionUtils; |
| import com.android.tools.r8.utils.structural.CompareToVisitor; |
| import com.android.tools.r8.utils.structural.HashingVisitor; |
| import com.android.tools.r8.utils.structural.StructuralSpecification; |
| import org.objectweb.asm.MethodVisitor; |
| import org.objectweb.asm.Opcodes; |
| |
| public class CfIinc extends CfInstruction { |
| |
| private final int var; |
| private final int increment; |
| |
| private static void specify(StructuralSpecification<CfIinc, ?> spec) { |
| spec.withInt(CfIinc::getLocalIndex).withInt(CfIinc::getIncrement); |
| } |
| |
| public CfIinc(int var, int increment) { |
| this.var = var; |
| this.increment = increment; |
| } |
| |
| @Override |
| public int getCompareToId() { |
| return Opcodes.IINC; |
| } |
| |
| @Override |
| public int internalAcceptCompareTo( |
| CfInstruction other, CompareToVisitor visitor, CfCompareHelper helper) { |
| return visitor.visit(this, (CfIinc) other, CfIinc::specify); |
| } |
| |
| @Override |
| public void internalAcceptHashing(HashingVisitor visitor) { |
| visitor.visit(this, CfIinc::specify); |
| } |
| |
| @Override |
| public void write( |
| AppView<?> appView, |
| ProgramMethod context, |
| DexItemFactory dexItemFactory, |
| GraphLens graphLens, |
| InitClassLens initClassLens, |
| NamingLens namingLens, |
| LensCodeRewriterUtils rewriter, |
| MethodVisitor visitor) { |
| visitor.visitIincInsn(var, increment); |
| } |
| |
| @Override |
| public int bytecodeSizeUpperBound() { |
| // iinc or wide iinc |
| return var < 256 && increment < 256 ? 3 : 6; |
| } |
| |
| @Override |
| public void print(CfPrinter printer) { |
| printer.print(this); |
| } |
| |
| public int getLocalIndex() { |
| return var; |
| } |
| |
| public int getIncrement() { |
| return increment; |
| } |
| |
| @Override |
| public void buildIR(IRBuilder builder, CfState state, CfSourceCode code) { |
| int local = state.read(var).register; |
| builder.addAddLiteral(NumericType.INT, local, local, increment); |
| } |
| |
| @Override |
| public ConstraintWithTarget inliningConstraint( |
| InliningConstraints inliningConstraints, CfCode code, ProgramMethod context) { |
| return ConstraintWithTarget.ALWAYS; |
| } |
| |
| @Override |
| public CfFrameState evaluate(CfFrameState frame, AppView<?> appView, CfAnalysisConfig config) { |
| return frame.readLocal( |
| appView, config, getLocalIndex(), ValueType.INT, FunctionUtils::getFirst); |
| } |
| } |