[llvm] Fix Failure to fold (and %x, (sext i1 %m)) -> (select %m, %x, 0) with multiple uses of %m Resolve #81288 (PR #81409)

[Simon Pilgrim via llvm-commits]

RKSimon wrote:

@nikic are you happy with the test coverage here?

https://github.com/llvm/llvm-project/pull/81409