[llvm] [LV] Apply urem folds to preheader (PR #213928)

[David Sherwood via llvm-commits]

david-arm wrote:

> It's just some best-effort to unstage some hunks, to compensate for UTC's deficiencies -- I personally always try to do it, and don't mind if others don't, but just noting that it's maybe 30 mins of grunt work with the right tools for 100+ files?

I don't mind having a look at seeing how prevalent this is and find a solution, but just saying in general I prefer not to manually edit files that claim to be auto-generated that's all.

https://github.com/llvm/llvm-project/pull/213928