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
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