1; RUN: llc < %s -O2 -march=x86-64 -verify-machineinstrs | FileCheck %s
2
3define void @pr21099(i64* %p) {
4; CHECK-LABEL: pr21099
5; CHECK: lock
6; CHECK-NEXT: addq $-2147483648
7; This number is INT32_MIN: 0x80000000UL
8  %1 = atomicrmw add i64* %p, i64 -2147483648 seq_cst
9  ret void
10}
11