[llvm] [AArch64] SME implementation for agnostic-ZA functions (PR #120150)

[Paul Walker via llvm-commits]

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@@ -3252,6 +3287,31 @@ MachineBasicBlock *AArch64TargetLowering::EmitInstrWithCustomInserter(
     return EmitInitTPIDR2Object(MI, BB);
   case AArch64::AllocateZABuffer:
     return EmitAllocateZABuffer(MI, BB);
+  case AArch64::AllocateSMESaveBuffer:
+    return EmitAllocateSMESaveBuffer(MI, BB);
+  case AArch64::GetSMESaveSize: {
+    // If the buffer is used, emit a call to __arm_sme_state_size()
+    MachineFunction *MF = BB->getParent();
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paulwalker-arm wrote:

Any reason for not having a dedicated function like the other opcodes?

https://github.com/llvm/llvm-project/pull/120150