[llvm] [SelectionDAG] Move VSelect sign pattern check from AArch64 to general SelectionDAG (PR #151840)

[Craig Topper via llvm-commits]

topperc wrote:

> > > For some reason the check is already there, but it bails out. Probably to allow aarch64 to transform it, but why not have the logic in SelectionDAG then?
> > 
> > 
> > Have you consulted git blame and git log to see if you can find an answer?
> 
> I did actually.

And that didn't give any answers?

https://github.com/llvm/llvm-project/pull/151840