[llvm] [RISCV] Optimize divide by constant for VP intrinsics (PR #125991)

[Luke Lau via llvm-commits]

lukel97 wrote:

> > @lukel97 if the vectorizer is moving away from using VP intrinsics, I guess we don't need this patch anymore?
> 
> IIUC, it it temporary? We may add it back in some day.

Users can also still write VP intrinsics by hand, I'm not sure how common this is though. I don't have a particularly strong opinion either way. Lifting InstCombine/DAGCombiner is still on the VP roadmap https://llvm.org/docs/Proposals/VectorPredication.html

https://github.com/llvm/llvm-project/pull/125991