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// 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.cf.code.CfFrame.FrameType;
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.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.utils.structural.CompareToVisitor;
import org.objectweb.asm.MethodVisitor;
import org.objectweb.asm.Opcodes;
public class CfNeg extends CfInstruction {
private final NumericType type;
public CfNeg(NumericType type) {
this.type = type;
}
public NumericType getType() {
return 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 write(
AppView<?> appView,
ProgramMethod context,
DexItemFactory dexItemFactory,
GraphLens graphLens,
InitClassLens initClassLens,
NamingLens namingLens,
LensCodeRewriterUtils rewriter,
MethodVisitor visitor) {
visitor.visitInsn(getAsmOpcode());
}
@Override
public void print(CfPrinter printer) {
printer.print(this);
}
public int getAsmOpcode() {
switch (type) {
case BYTE:
case CHAR:
case SHORT:
case INT:
return Opcodes.INEG;
case LONG:
return Opcodes.LNEG;
case FLOAT:
return Opcodes.FNEG;
case DOUBLE:
return Opcodes.DNEG;
default:
throw new Unreachable("Invalid type for CfNeg " + type);
}
}
public static CfNeg fromAsm(int opcode) {
switch (opcode) {
case Opcodes.INEG:
return new CfNeg(NumericType.INT);
case Opcodes.LNEG:
return new CfNeg(NumericType.LONG);
case Opcodes.FNEG:
return new CfNeg(NumericType.FLOAT);
case Opcodes.DNEG:
return new CfNeg(NumericType.DOUBLE);
default:
throw new Unreachable("Invalid opcode for CfNeg " + opcode);
}
}
@Override
public void buildIR(IRBuilder builder, CfState state, CfSourceCode code) {
int value = state.pop().register;
builder.addNeg(type, state.push(ValueType.fromNumericType(type)).register, value);
}
@Override
public ConstraintWithTarget inliningConstraint(
InliningConstraints inliningConstraints, CfCode code, ProgramMethod context) {
return inliningConstraints.forUnop();
}
@Override
public void evaluate(
CfFrameVerificationHelper frameBuilder,
DexType context,
DexType returnType,
DexItemFactory factory,
InitClassLens initClassLens) {
// ..., value →
// ..., result
FrameType frameType = FrameType.fromNumericType(type, factory);
frameBuilder.popAndDiscard(frameType).push(frameType);
}
}