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=iso9899:1999 -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 #define old_offsetof(TYPE, MEMBER) ((__SIZE_TYPE__)(__UINTPTR_TYPE__) &((TYPE *)0)->MEMBER) 18 19 enum e { 20 E1 = old_offsetof (struct s, a), /* { dg-error "constant" } */ 21 E2 = old_offsetof (struct t, a.a), /* { dg-error "constant" } */ 22 E3 = old_offsetof (struct t, b[1]), /* { dg-error "constant" } */ 23 E4 = __builtin_offsetof (struct s, a), 24 E5 = __builtin_offsetof (struct t, a.a), 25 E6 = __builtin_offsetof (struct t, b[1]) 26 }; 27