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

[David Sherwood via llvm-commits]

david-arm wrote:

Abandoned as most of the work has now landed, and is being enabled by default with https://github.com/llvm/llvm-project/pull/133099

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