[llvm] Allow folding icmp eq (add X, C2), C when there is more than one-use when we can compute the range (PR #144566)

[via llvm-commits]

AZero13 wrote:

@topperc this is having too many side effects. I think we should do what I originally did for now and then I will invest working on a proper fix because this is not going to be easily done in one PR

https://github.com/llvm/llvm-project/pull/144566