1  /* PR tree-optimization/101741 */
       2  /* { dg-do compile } */
       3  /* { dg-options "-O2 " } */
       4  
       5  int
       6  foo (void);
       7  
       8  unsigned int
       9  toupper (int c)
      10  {
      11    c = foo ();
      12    while (c)
      13      c = toupper (c);
      14  
      15    return c;
      16  }