[clang] [llvm] [AArch64][SME] Implement inline-asm clobbers for za/zt0 (PR #79276)

[Sander de Smalen via cfe-commits]

================
@@ -507,6 +507,10 @@ bool AArch64RegisterInfo::isAsmClobberable(const MachineFunction &MF,
         MCRegisterInfo::regsOverlap(PhysReg, AArch64::X16))
     return true;
 
+  // ZA/ZT0 registers are reserved but may be permitted in the clobber list.
+  if (PhysReg.id() == AArch64::ZA || PhysReg.id() == AArch64::ZT0)
----------------
sdesmalen-arm wrote:

```suggestion
  if (PhysReg == AArch64::ZA || PhysReg == AArch64::ZT0)
```

https://github.com/llvm/llvm-project/pull/79276