[llvm] [AArch64] Separate PNR into its own Register Class (PR #65306)

[via llvm-commits]

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@@ -3658,6 +3658,32 @@ void AArch64InstrInfo::copyPhysReg(MachineBasicBlock &MBB,
     return;
   }
 
+  if (AArch64::PNRRegClass.contains(DestReg) &&
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sdesmalen-arm wrote:

Could you add some tests for these COPYs?

https://github.com/llvm/llvm-project/pull/65306