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

[Florian Hahn via llvm-commits]

https://github.com/fhahn commented:

> Instruction::Add still does not work, crashes the compiler because this VPInstruction returns that it "does not use only first lane".

Can you push that commit somewhere so I can have a look? Looks like only-first-lane-used analysis might need some additional info.

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