[llvm] [AArch64][SME] Disable hazard padding when there is only PPRs and GPRs (PR #137817)

[Gaëtan Bossu via llvm-commits]

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@@ -3552,11 +3558,12 @@ void AArch64FrameLowering::determineStackHazardSlot(
 
   // Add a hazard slot if there are any CSR FPR registers, or are any fp-only
   // stack objects.
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gbossu wrote:

Noob question: It's not really clear to me what a hazard slot is. I first assumed it was an emergency spill slot, but it seems to be different?

https://github.com/llvm/llvm-project/pull/137817