[llvm] [DAG] Refactor X86 combineVSelectWithAllOnesOrZeros fold into a generic DAG Combine (PR #145298)

[David Green via llvm-commits]

davemgreen wrote:

Oh - that sounds OK. I had misread the new code, it doesn't create new nodes though, only bails out.

https://github.com/llvm/llvm-project/pull/145298