[llvm] [LV, VP]VP intrinsics support for the Loop Vectorizer + adding new tail-folding mode using EVL. (PR #76172)

[Alexey Bataev via llvm-commits]

alexey-bataev wrote:

Hi Alex, yes, at least one builder should enable this option. I think we need to test both configs for now, with and without this option.

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