| John Bauman | 66b8ab2 | 2014-05-06 15:57:45 -0400 | [diff] [blame] | 1 | ; RUN: llc < %s -march=x86-64 | FileCheck %s |
| 2 | |||||
| 3 | @var = external global i64 ; <i64*> [#uses=1] | ||||
| 4 | |||||
| 5 | define i32 @main() nounwind { | ||||
| 6 | entry: | ||||
| 7 | ; CHECK: main: | ||||
| 8 | ; CHECK: lock | ||||
| 9 | ; CHECK: decq | ||||
| 10 | atomicrmw sub i64* @var, i64 1 monotonic | ||||
| 11 | unreachable | ||||
| 12 | } | ||||