1  /* { dg-do compile } */
       2  /* { dg-options "-O2 -fdump-tree-optimized" } */
       3  
       4  int spinlock[2];
       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" } } */