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

[Sjoerd Meijer via llvm-commits]

sjoerdmeijer wrote:

I was wondering if it would be good to add some AArch64 codegen tests too so that we can look at some codegen?

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