[llvm] [AArch64] Enable RT and partial unrolling with reductions for Apple CPUs. (PR #149699)

[Florian Hahn via llvm-commits]

fhahn wrote:

> Can you add one or two examples of loops that can be handled by unrolling, but not interleaving, so we have them for reference?

Yep, added them in the PR that adds the new capability to LoopUnroll: https://github.com/llvm/llvm-project/pull/149470/commits/ea20c672e8b184ec302bd9b68ad8aa111f2fa21b

https://github.com/llvm/llvm-project/pull/149699