[llvm] [InstCombine] Fix pointer replacement in `foldSelectValueEquivalence` (PR #161701)

[Antonio Frighetto via llvm-commits]

antoniofrighetto wrote:

Maybe I'm missing something, but at least from the tests, aren't the three canReplacePointersIfEqual being invoked on the same pointers all the times? Couldn't this be done only once?

https://github.com/llvm/llvm-project/pull/161701