Subversion Repositories openrisc

/* Tail call optimizations would convert func() into the moral equivalent of:
 
       double acc = 0.0;
       for (int i = 0; i <= n; i++)
	 acc += d;
       return acc;
 
   which mishandles the case where 'd' is -0.  They also initialised 'acc'
   to a zero int rather than a zero double.  */
 
double func (double d, int n)
{
  if (n == 0)
    return d;
  else
    return d + func (d, n - 1);
}
 
int main ()
{
  if (__builtin_copysign (1.0, func (0.0 / -5.0, 10)) != -1.0)
    abort ();
  exit (0);
}