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 };
30