1  /* PR rtl-optimization/55838 */
       2  /* { dg-do compile } */
       3  /* { dg-options "-O2 -funroll-loops" } */
       4  
       5  int a;
       6  unsigned char c;
       7  
       8  void
       9  f (void)
      10  {
      11    while (c++ < 2)
      12      c = a += 129;
      13  }