gcc/testsuite/gcc.dg/atomic-fence.c

/* Test __atomic routines for existence and execution with each valid 
   memory model.  */
/* { dg-do run } */
/* { dg-require-effective-target sync_char_short } */


/* Test that __atomic_{thread,signal}_fence builtins execute.  */

int
main ()
{
  __atomic_thread_fence (__ATOMIC_RELAXED);
  __atomic_thread_fence (__ATOMIC_CONSUME);
  __atomic_thread_fence (__ATOMIC_ACQUIRE);
  __atomic_thread_fence (__ATOMIC_RELEASE);
  __atomic_thread_fence (__ATOMIC_ACQ_REL);
  __atomic_thread_fence (__ATOMIC_SEQ_CST);

  __atomic_signal_fence (__ATOMIC_RELAXED);
  __atomic_signal_fence (__ATOMIC_CONSUME);
  __atomic_signal_fence (__ATOMIC_ACQUIRE);
  __atomic_signal_fence (__ATOMIC_RELEASE);
  __atomic_signal_fence (__ATOMIC_ACQ_REL);
  __atomic_signal_fence (__ATOMIC_SEQ_CST);

  return 0;
}