[llvm] [IR] Add disjoint flag for Or instructions. (PR #72583)

[Nikita Popov via llvm-commits]

https://github.com/nikic commented:

This basically looks fine to me.

This is missing the flag drop in InstCombineSimplifyDemanded.

Can you please also add a test to llvm/test/Transforms/SimplifyCFG/HoistCode.ll to cover the flag intersect?

https://github.com/llvm/llvm-project/pull/72583