A_ALLOCNOS.  */
  int n;
};

/* Initialize the iterator I.  */
inline void
ira_allocno_iter_init (ira_allocno_iterator *i)
{
  i->n = 0;
}

/* Return TRUE if we have more allocnos to visit, in which case *A is
   set to the allocno to be visited.  Otherwise, return FALSE.  */
inline bool
ira_allocno_iter_cond (ira_allocno_iterator *i, ira_allocno_t *a)
{
  int n;

  for (n = i->n; n < ira_allocnos_num; n++)
    if (ira_allocnos[n] != NULL)
      {
	*a = ira_allocnos[n];
	i->n = n + 1;
	return true;
      }
  return false;
}

/* Loop over all allocnos.  In each iteration, A is set to the next
   allocno.  ITER is an instance of ira_allocno_iterator used to iterate
   the allocnos.  */
#define FOR_EACH_ALLOCNO(A, ITER)			\
  for (ira_allocno_iter_init (&(ITER));			\
       ira_allocno_iter_cond (&(ITER), &(A));)