1  /* { dg-do compile } */
       2  /* { dg-options "-std=iso9899:1990 -pedantic-errors" } */
       3  
       4  enum E { A = -2 << 1 };
       5  int i = -1 << 0;
       6  
       7  int
       8  f (int i)
       9  {
      10    switch (i)
      11    case -1 << 0: break;
      12  }