1  /* Test for constant expressions: __builtin_offsetof allowed in
       2     integer constant expressions but not traditional offsetof
       3     expansion.  */
       4  /* Origin: Joseph Myers <joseph@codesourcery.com> */
       5  /* { dg-do compile } */
       6  /* { dg-options "-std=iso9899:1990 -pedantic-errors -ftrack-macro-expansion=0" } */
       7  
       8  struct s {
       9    int a;
      10  };
      11  
      12  struct t {
      13    struct s a;
      14    int b[2];
      15  };
      16  
      17  __extension__ typedef __SIZE_TYPE__ size_t;
      18  __extension__ typedef __UINTPTR_TYPE__ uintptr_t;
      19  
      20  #define old_offsetof(TYPE, MEMBER) ((size_t) (uintptr_t) &((TYPE *)0)->MEMBER)
      21  
      22  enum e {
      23    E1 = old_offsetof (struct s, a), /* { dg-error "constant" } */
      24    E2 = old_offsetof (struct t, a.a), /* { dg-error "constant" } */
      25    E3 = old_offsetof (struct t, b[1]), /* { dg-error "constant" } */
      26    E4 = __builtin_offsetof (struct s, a),
      27    E5 = __builtin_offsetof (struct t, a.a),
      28    E6 = __builtin_offsetof (struct t, b[1])
      29  };