[llvm] [X86] visitSelect - widen select(cond,extract_subvector(shuffle(vec0)),vec1) if it will create a mask instruction (PR #115223)

[Phoebe Wang via llvm-commits]

https://github.com/phoebewang approved this pull request.

LGTM.

https://github.com/llvm/llvm-project/pull/115223