[llvm] [LoopVectorize][LAA] Hoist load in memory IV to allow vectorization (PR #168312)

[Raphael Moreira Zinsly via llvm-commits]

rzinsly wrote:

@fhahn Hi
Do you still have concerns with this approach?
Note that a big chunk of code was moved from LAA to LV
I'm interested in moving this forward, is it ok continue with this approach or is there a preferred alternative?

https://github.com/llvm/llvm-project/pull/168312