[llvm] [LV, VP]VP intrinsics support for the Loop Vectorizer (PR #76172)

[Alexey Bataev via llvm-commits]

alexey-bataev wrote:

> Oh right, surprised it is already used by PPC. EVL LV won't work on PPC due to them not using scalable vectors? At least I cannot find a test that uses vscale. But would it make sense to support EVL on PPC, if it supports active-vector-length?

Currently it won't work for PPC, since it has some specific checks in TTI. We (or PPC developers) can enable it later.

https://github.com/llvm/llvm-project/pull/76172