[llvm] [AArch64][SME2] Add stridedorcontiguous pseudos for multi-vector-stores (PR #211551)

[Sander de Smalen via llvm-commits]

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@@ -205,6 +364,25 @@ define void @st1_x4_i32(<vscale x 16 x i8> %unused, <vscale x 4 x i32> %zn0, <vs
 ; CHECK-NEXT:    addvl sp, sp, #1
 ; CHECK-NEXT:    ldr x29, [sp], #16 // 8-byte Folded Reload
 ; CHECK-NEXT:    ret
+;
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sdesmalen-arm wrote:

Nothing needs necessarily fixing here, as this is an artificial case, but in this particular case it would have been better to pick the contiguous form to avoid the callee-save spills/fills.

https://github.com/llvm/llvm-project/pull/211551