[llvm] [InstCombine] Explicitly mark select weights from e4722c6 as unknown (PR #174134)

[Nikita Popov via llvm-commits]

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

LGTM, but I wonder whether it would make sense to add a CreateSelectWithUnknownProfile variant for CreateSelectFMF?

https://github.com/llvm/llvm-project/pull/174134