[llvm] [InstSimplify] `A == MIN_INT ? B != MIN_INT : A < B` to `A < B` (PR #120177)

[Nikita Popov via llvm-commits]

nikic wrote:

> You should either implement this fold and drop the flag in InstCombine or bail out on icmps with `samesign` in InstSimplify.

The first option is preferred.

https://github.com/llvm/llvm-project/pull/120177