[llvm] [SelectOpt] Add handling for Select-like operations. (PR #77284)

[Sjoerd Meijer via llvm-commits]

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

Looks like a good change to me, but give it a few days in case there are more comments.

https://github.com/llvm/llvm-project/pull/77284