[llvm] [LoopVectorize] Add support for vectorisation of more early exit loops (PR #88385)

[David Sherwood via llvm-commits]

https://github.com/david-arm commented:

Hi @fhahn, thanks for taking a look. I've left some replies and I'll take a look at refactoring LoopVectorizationLegality to pull some of the logic out into a common place in lib/Analysis.

https://github.com/llvm/llvm-project/pull/88385