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

[Vineet Kumar via llvm-commits]

vntkmr wrote:

> > @alexey-bataev I just noticed that this patch is merged, good work! As you might remember, I was the original author of this patch [back in 2021 while at BSC](https://lists.llvm.org/pipermail/llvm-dev/2021-April/149580.html), before you took over.
> > I noticed that because of the move from phabricator to github, some of the history of this patch is now lost - I can't find a way to access the initial commits and discussions on the patch from 2021. I will appreciate if you can add an acknowledgement for the initial work on this patch.
> > CC: @rofirrim @simoll
> > Vineet Kumar
> 
> Hi, sure! Sorry, forgot about that :(

Thank you! 

For those interested in the initial version and older discussion on this patch, it is recorded on the internet archive at https://web.archive.org/web/20230128111909/https://reviews.llvm.org/D99750.
"Show Older Changes" link on the archived phabricator page does not work anymore, unfortunately.

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