[llvm] [AArch64] Fix the assertion failure on `RegisterVT == PartVT && "Part… (PR #170632)

[Cheng Lingfei via llvm-commits]

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@@ -0,0 +1,19 @@
+; RUN: llc -mtriple=aarch64--linux-gnu < %s | FileCheck %s
+
+define dso_local void @_Z3fooi(ptr %x, ptr %y) #0 {
+; CHECK-LABEL: _Z3fooi:
+; CHECK:       // %bb.0:
+; CHECK-NEXT:    //APP
+; CHECK-NEXT:    //NO_APP
+; CHECK-NEXT:    stp	q1, q2, [x1]
+; CHECK-NEXT:    ldp	q0, q1, [x0]
+; CHECK-NEXT:    //APP
+; CHECK-NEXT:    //NO_APP
+; CHECK-NEXT:    ret
+entry:
+  %0 = call <8 x i32> asm sideeffect "", "={z1}"()
+  store <8 x i32> %0, ptr %y, align 16
+  %13 = load <8 x i32>, ptr %x, align 16
+  call void asm sideeffect "", "{z0}"(<8 x i32> %13)
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clingfei wrote:

Currently, I couldn't find a way to trigger it via a function call, maybe it can only be triggered on asm.

https://github.com/llvm/llvm-project/pull/170632