[llvm] [VPlan] Dispatch to multiple exit blocks via middle blocks. (PR #112138)

[David Sherwood via llvm-commits]

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

Thanks for this! I realise you're busy with the LLVM dev conference, but thought I'd leave a few comments I have so far ...

https://github.com/llvm/llvm-project/pull/112138