[llvm] [LoopVectorize] Don't scalarize predicated instruction with optsize (PR #129265)

[John Brawn via llvm-commits]

john-brawn-arm wrote:

> I like this patch - it seems very sensible! However, as I mentioned in one of the comments I think it would be good to split the NFC parts out into their own patch because they are a useful clean-up by themselves.

I've split this off into #130752.


https://github.com/llvm/llvm-project/pull/129265