[llvm] [LV] Introduce the EVLIVSimplify Pass for EVL-vectorized loops (PR #91796)

[Florian Hahn via llvm-commits]

https://github.com/fhahn commented:

as this is a backend pass, wouldn't it be better suited in `llvm/lib/Codegen` like other IR codegen passes?

https://github.com/llvm/llvm-project/pull/91796