[llvm] [AArch64] Use a frame record for non-leaf outlined functions on MachO (PR #213711)

[Kyungwoo Lee via llvm-commits]

kyulee-com wrote:

Thanks for the reviews!

@cofibrant Agreed, I refactored this so the final decision helper takes the outlined MBB and checks the unwind/FP conditions itself. I kept a separate prediction helper for the cost model because the outlined MBB does not exist yet at that point.

@jroelofs I folded the unwind-info check into the frame-record predicate, so this path is only reached when unwind info is needed.

https://github.com/llvm/llvm-project/pull/213711