1 /* { dg-do compile } */
2 /* { dg-options "-O2 -fdump-tree-optimized" } */
3 
4 int spinlock[2];
main()5 int main ()
6 {
7 volatile int * spinlock0;
8 volatile int * spinlock1;
9 spinlock0 = &spinlock[0];
10 spinlock1 = &spinlock[1];
11 
12 *spinlock0 = 0;
13 *spinlock1 = 0;
14  while (*spinlock0);
15 }
16 
17 /* { dg-final { scan-tree-dump "={v} .*spinlock" "optimized" } } */
18 /* { dg-final { scan-tree-dump "spinlock.* ={v}" "optimized" } } */
19