llvm-project

ec1a65ff - [DAGCombiner] Relax nsz constraint with fp->int->fp optimizations (#164503)

[DAGCombiner] Relax nsz constraint with fp->int->fp optimizations (#164503) `NoSignedZerosFPMath` isn't a hard requirements and in some contexts we can still apply the truncation without worrying. For example, in cases where the users of this sequence are overwriting the sign-bit (fabs) or simply ignoring it (fcmp). I think the same logic can be applied elsewhere for other DAG optimizations.