| Dan Gohman | 0a06310 | 2009-09-08 23:54:48 +0000 | [diff] [blame] | 1 | ; RUN: llc < %s -march=x86-64 | FileCheck %s |
| Bill Wendling | 6f189e2 | 2008-08-19 23:09:18 +0000 | [diff] [blame] | 2 | |
| 3 | @var = external global i64 ; <i64*> [#uses=1] |
| 4 | |
| 5 | define i32 @main() nounwind { |
| 6 | entry: |
| Evan Cheng | b723fb5 | 2009-07-30 08:33:02 +0000 | [diff] [blame] | 7 | ; CHECK: main: |
| 8 | ; CHECK: lock |
| 9 | ; CHECK: decq |
| Bill Wendling | 6f189e2 | 2008-08-19 23:09:18 +0000 | [diff] [blame] | 10 | tail call i64 @llvm.atomic.load.sub.i64.p0i64( i64* @var, i64 1 ) ; <i64>:0 [#uses=0] |
| 11 | unreachable |
| 12 | } |
| 13 | |
| 14 | declare i64 @llvm.atomic.load.sub.i64.p0i64(i64*, i64) nounwind |