| // 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.DexItemFactory; |
| 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.Cmp; |
| import com.android.tools.r8.ir.code.Cmp.Bias; |
| 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.structural.CompareToVisitor; |
| import com.android.tools.r8.utils.structural.HashingVisitor; |
| import org.objectweb.asm.MethodVisitor; |
| import org.objectweb.asm.Opcodes; |
| |
| public class CfCmp extends CfInstruction { |
| |
| private final Bias bias; |
| private final NumericType type; |
| |
| public CfCmp(Bias bias, NumericType type) { |
| assert bias != null; |
| assert type != null; |
| assert type == NumericType.LONG || type == NumericType.FLOAT || type == NumericType.DOUBLE; |
| assert type != NumericType.LONG || bias == Cmp.Bias.NONE; |
| assert type == NumericType.LONG || bias != Cmp.Bias.NONE; |
| this.bias = bias; |
| this.type = type; |
| } |
| |
| @Override |
| public int getCompareToId() { |
| return getAsmOpcode(); |
| } |
| |
| @Override |
| public int internalAcceptCompareTo( |
| CfInstruction other, CompareToVisitor visitor, CfCompareHelper helper) { |
| return CfCompareHelper.compareIdUniquelyDeterminesEquality(this, other); |
| } |
| |
| @Override |
| public void internalAcceptHashing(HashingVisitor visitor) { |
| // Nothing to add. |
| } |
| |
| public Bias getBias() { |
| return bias; |
| } |
| |
| public NumericType getType() { |
| return type; |
| } |
| |
| public static CfCmp fromAsm(int opcode) { |
| switch (opcode) { |
| case Opcodes.LCMP: |
| return new CfCmp(Bias.NONE, NumericType.LONG); |
| case Opcodes.FCMPL: |
| return new CfCmp(Bias.LT, NumericType.FLOAT); |
| case Opcodes.FCMPG: |
| return new CfCmp(Bias.GT, NumericType.FLOAT); |
| case Opcodes.DCMPL: |
| return new CfCmp(Bias.LT, NumericType.DOUBLE); |
| case Opcodes.DCMPG: |
| return new CfCmp(Bias.GT, NumericType.DOUBLE); |
| default: |
| throw new Unreachable("Wrong ASM opcode for CfCmp " + opcode); |
| } |
| } |
| |
| public int getAsmOpcode() { |
| switch (type) { |
| case LONG: |
| return Opcodes.LCMP; |
| case FLOAT: |
| return bias == Cmp.Bias.LT ? Opcodes.FCMPL : Opcodes.FCMPG; |
| case DOUBLE: |
| return bias == Cmp.Bias.LT ? Opcodes.DCMPL : Opcodes.DCMPG; |
| default: |
| throw new Unreachable("CfCmp has unknown type " + type); |
| } |
| } |
| |
| @Override |
| public void print(CfPrinter printer) { |
| printer.print(this); |
| } |
| |
| @Override |
| public void write( |
| AppView<?> appView, |
| ProgramMethod context, |
| DexItemFactory dexItemFactory, |
| GraphLens graphLens, |
| InitClassLens initClassLens, |
| NamingLens namingLens, |
| LensCodeRewriterUtils rewriter, |
| MethodVisitor visitor) { |
| visitor.visitInsn(getAsmOpcode()); |
| } |
| |
| @Override |
| public int bytecodeSizeUpperBound() { |
| return 1; |
| } |
| |
| @Override |
| public void buildIR(IRBuilder builder, CfState state, CfSourceCode code) { |
| int right = state.pop().register; |
| int left = state.pop().register; |
| builder.addCmp(type, bias, state.push(ValueType.INT).register, left, right); |
| } |
| |
| @Override |
| public ConstraintWithTarget inliningConstraint( |
| InliningConstraints inliningConstraints, CfCode code, ProgramMethod context) { |
| return inliningConstraints.forBinop(); |
| } |
| |
| @Override |
| public CfFrameState evaluate(CfFrameState frame, AppView<?> appView, CfAnalysisConfig config) { |
| // ..., value1, value2 → |
| // ..., result |
| return frame |
| .popInitialized(appView, config, type) |
| .popInitialized(appView, config, type) |
| .push(config, appView.dexItemFactory().intType); |
| } |
| } |