[llvm] [GlobalISel] Combine (X == 0) & (Y == 0) -> (X | Y) == 0 (PR #71949)

[Dávid Ferenc Szabó via llvm-commits]

dfszabo wrote:

> Was this crash fixed by [8e8c954](https://github.com/llvm/llvm-project/commit/8e8c954a173e0e814de1207513f357e99dff2e85)?

Yes! Nice, I rebased the PR and did some minor change to make it work.

https://github.com/llvm/llvm-project/pull/71949