diff --git a/llvm/test/CodeGen/AArch64/pr40091.ll b/llvm/test/CodeGen/AArch64/pr40091.ll
new file mode 100644
index 000000000000..8cf51f4beb5f
--- /dev/null
+++ b/llvm/test/CodeGen/AArch64/pr40091.ll
@@ -0,0 +1,22 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
+; RUN: llc < %s -mtriple=aarch64-arm-none-eabi | FileCheck %s
+
+define i64 @test(i64 %aa) {
+; CHECK-LABEL: test:
+; CHECK:       // %bb.0: // %entry
+; CHECK-NEXT:    movi v0.2d, #0xffffffffffffffff
+; CHECK-NEXT:    fmov x0, d0
+; CHECK-NEXT:    ret
+entry:
+  %a = bitcast i64 %aa to  <1 x i64>
+  %k = icmp sgt <1 x i64> %a, zeroinitializer
+  %l = zext <1 x i1> %k to <1 x i64>
+  %o = and <1 x i64> %l, %a
+  %p = xor <1 x i64> %l, <i64 -1>
+  %q = and <1 x i64> %p, <i64 81985529216486895>
+  %r = or <1 x i64> %q, %o
+  %s = bitcast <1 x i64> %r to <8 x i8>
+  %t = shufflevector <8 x i8> %s, <8 x i8> %s, <8 x i32> <i32 3, i32 3, i32 3, i32 3, i32 3, i32 3, i32 3, i32 3>
+  %u = bitcast <8 x i8> %t to i64
+  ret i64 %u
+}