gcc/testsuite/gcc.dg/pr32721.c

   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" } } */
  19 /* { dg-final { cleanup-tree-dump "optimized" } } */