[PATCH] D25297: [DAG] use SDNode flags 'nsz' to enable fadd/fsub with zero folds

[Sanjay Patel via llvm-commits]

spatel added a comment.

In https://reviews.llvm.org/D25297#575826, @echristo wrote:

> This seems reasonable to me. I'd like to see something that adds the attribute to the instructions at some point, but as an intermediate step this is fine.


Do you mean propagate the FMF flags on the returned SDNode? Eg:

  return DAG.getNode(ISD::FNEG, DL, VT, N1, Flags);

Oops...I forgot to do that in *this* patch.


https://reviews.llvm.org/D25297