1  /* { dg-do compile } */
       2  /* { dg-options "-std=iso9899:1999 -pedantic-errors -Wno-shift-overflow" } */
       3  
       4  #define INTM1 (sizeof (int) * __CHAR_BIT__ - 1)
       5  
       6  enum { A = 1 << INTM1 }; /* { dg-error "constant expression" } */
       7  int k = 1 << INTM1; /* { dg-error "constant expression" } */
       8  
       9  void
      10  fn (int i)
      11  {
      12    switch (i)
      13    case 1 << INTM1: break; /* { dg-error "constant expression" } */
      14  }