[llvm-branch-commits] [llvm] [AArch64][SME] Support split ZPR and PPR area allocation (PR #142392)

[Benjamin Maxwell via llvm-branch-commits]

MacDue wrote:

> In the implementation you're interested in, is there not a hazard between PPRs and GPRs?

There are no hazards between PPRs and GPRs (those types of memory accesses can both be considered as occurring on the CPU). 

> What's the interaction between this and aarch64-enable-zpr-predicate-spills?

It cannot be enabled at the same time. We intend to remove `aarch64-enable-zpr-predicate-spills` after this lands (as it was a stopgap solution). 

https://github.com/llvm/llvm-project/pull/142392