[AArch64] Pre-commit test for #86717. NFC

Author: topperc

llvm/test/CodeGen/AArch64/pr86717.ll

@@ -0,0 +1,22 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 4
+; RUN: llc < %s -mtriple=aarch64 | FileCheck %s
+
+define <16 x i8> @f(i32 %0) {
+; CHECK-LABEL: f:
+; CHECK:       // %bb.0:
+; CHECK-NEXT:    sub sp, sp, #16
+; CHECK-NEXT:    .cfi_def_cfa_offset 16
+; CHECK-NEXT:    movi v0.2d, #0000000000000000
+; CHECK-NEXT:    mov w8, #1 // =0x1
+; CHECK-NEXT:    mov x9, sp
+; CHECK-NEXT:    sub w8, w8, w0
+; CHECK-NEXT:    mov w10, #3 // =0x3
+; CHECK-NEXT:    orr x8, x9, x8
+; CHECK-NEXT:    str q0, [sp]
+; CHECK-NEXT:    strb w10, [x8]
+; CHECK-NEXT:    ldr q0, [sp], #16
+; CHECK-NEXT:    ret
+  %2 = sub nuw i32 1, %0
+  %3 = insertelement <16 x i8> zeroinitializer, i8 3, i32 %2
+  ret <16 x i8> %3
+}