break;
}
case Intrinsic::copysign: {
- if (SignBitMustBeZero(II->getArgOperand(1), &TLI)) {
+ Value *Mag = II->getArgOperand(0), *Sign = II->getArgOperand(1);
+ if (SignBitMustBeZero(Sign, &TLI)) {
// If we know that the sign argument is positive, reduce to FABS:
- // copysign X, Pos --> fabs X
- Value *Fabs = Builder.CreateUnaryIntrinsic(Intrinsic::fabs,
- II->getArgOperand(0), II);
+ // copysign Mag, +Sign --> fabs Mag
+ Value *Fabs = Builder.CreateUnaryIntrinsic(Intrinsic::fabs, Mag, II);
return replaceInstUsesWith(*II, Fabs);
}
// TODO: There should be a ValueTracking sibling like SignBitMustBeOne.
const APFloat *C;
- if (match(II->getArgOperand(1), m_APFloat(C)) && C->isNegative()) {
+ if (match(Sign, m_APFloat(C)) && C->isNegative()) {
// If we know that the sign argument is negative, reduce to FNABS:
- // copysign X, Neg --> fneg (fabs X)
- Value *Fabs = Builder.CreateUnaryIntrinsic(Intrinsic::fabs,
- II->getArgOperand(0), II);
+ // copysign Mag, -Sign --> fneg (fabs Mag)
+ Value *Fabs = Builder.CreateUnaryIntrinsic(Intrinsic::fabs, Mag, II);
return replaceInstUsesWith(*II, Builder.CreateFNegFMF(Fabs, II));
}
// Propagate sign argument through nested calls:
- // copysign X, (copysign ?, SignArg) --> copysign X, SignArg
- Value *SignArg;
- if (match(II->getArgOperand(1),
- m_Intrinsic<Intrinsic::copysign>(m_Value(), m_Value(SignArg))))
- return replaceOperand(*II, 1, SignArg);
+ // copysign Mag, (copysign ?, X) --> copysign Mag, X
+ Value *X;
+ if (match(Sign, m_Intrinsic<Intrinsic::copysign>(m_Value(), m_Value(X))))
+ return replaceOperand(*II, 1, X);
break;
}