[llvm] [AArch64][SME2] Add FORM_STRIDED_TUPLE pseudo nodes (PR #116399)

[Sander de Smalen via llvm-commits]

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@@ -8666,6 +8671,77 @@ void AArch64TargetLowering::AdjustInstrPostInstrSelection(MachineInstr &MI,
     }
   }
 
+  if (MI.getOpcode() == AArch64::FORM_STRIDED_TUPLE_X2_PSEUDO ||
+      MI.getOpcode() == AArch64::FORM_STRIDED_TUPLE_X4_PSEUDO) {
+    MachineRegisterInfo &MRI = MI.getMF()->getRegInfo();
+    bool UseFormStrided = false;
+    unsigned Size =
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sdesmalen-arm wrote:

nit:
```suggestion
    unsigned NumOpnds =
```

https://github.com/llvm/llvm-project/pull/116399