[llvm] [InstCombine] Fold `select (a == b | other_cond), a, b` to `select (other_cond), a, b` (PR #76203)

[Nikita Popov via llvm-commits]

https://github.com/nikic commented:

It should be possible to generalize the fold via simplifyWithOpReplaced(), but this seems like a reasonable starting point.

https://github.com/llvm/llvm-project/pull/76203