[llvm] [InstCombine] Fold (X == 0 ? Y : 0) | X to X == 0 ? Y : X (PR #138373)

[Nikita Popov via llvm-commits]

https://github.com/nikic commented:

At a high level, this seems like we should be able to handle it generically with a FoldOpIntoSelect-style transform, but that currently only works with a constant binop operand.

https://github.com/llvm/llvm-project/pull/138373