[llvm] [InstCombine] Fold comparison of adding two z/sext booleans (PR #67895)

[Nikita Popov via llvm-commits]

nikic wrote:

@elhewaty Given that the implementation is predicate-independent, I don't think you need the complete test matrix, just some representative tests for other predicates. Also keep in mind that uge, ule, sge, sle will be canonicalized to ugt, ult, sgt, slt, so it will not be possible to test those predicates in the first place.

https://github.com/llvm/llvm-project/pull/67895