[llvm] [InstCombine] Simplify and/or of icmp eq with op replacement (PR #70335)

[Nikita Popov via llvm-commits]

nikic wrote:

@amykhuang Do you still see a size increase with the reapplied version of the patch?

I think it's plausible that the llvm.is.constant issue could have resulted in a binary size increase, in which case that should be resolved now. If it's not, I'd expect that this is some kind of second order effect not directly related to this patch.

https://github.com/llvm/llvm-project/pull/70335