[llvm] [GlobalISel] Combine (X == 0) & (Y == 0) -> (X | Y) == 0 (PR #69017)

[Dávid Ferenc Szabó via llvm-commits]

dfszabo wrote:

> Can you try doing this with the new tablegen combiner support?

Good idea, but for the reason @aemerson mentioned it does not seem feasible.

https://github.com/llvm/llvm-project/pull/69017