[llvm] [SCEV] Introduce UDiv::mayTriggerUB (NFC) (PR #217064)

[Ramkumar Ramachandra via llvm-commits]

artagnon wrote:

> > Some good improvements: https://github.com/dtcxzyw/llvm-opt-benchmark-nightly/pull/959/changes.
> 
> There are a lot of changes, but a lot of them look like regressions after first glance? It changes how/where runtime checks are emitted. this needs a test

Thanks, made it NFC for now. I just wanted to reduce the diff for the scev-sdiv patch, and this patch doesn't really have free-standing merit or motivation.

https://github.com/llvm/llvm-project/pull/217064