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

[David Sherwood via llvm-commits]

david-arm wrote:

I realise this PR is very out of date, but just for reference this work is nearing completion, but has been done through many other smaller PRs, including a nice patch by @fhahn adding support for multiple exits in VPlan. Here is one of the remaining PRs to add support for loops with live-outs: https://github.com/llvm/llvm-project/pull/120567

I also have a WIP patch to add support for versioning early exit loops with potentially faulting pointers: https://github.com/llvm/llvm-project/pull/120603

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