offsetof.c revision 601bae3b1d3c06e8c91f6ea77dd2b0315353ee0b 
1// RUN: clang -fsyntax-only -verify %s
2
3#define offsetof(TYPE, MEMBER) __builtin_offsetof (TYPE, MEMBER)
4
5typedef struct P { int i; float f; } PT;
6struct external_sun3_core
7{
8 unsigned c_regs;
9
10  PT  X[100];
11
12};
13
14void swap()
15{
16  int x;
17  x = offsetof(struct external_sun3_core, c_regs);
18  x = __builtin_offsetof(struct external_sun3_core, X[42].f);
19
20  x = __builtin_offsetof(struct external_sun3_core, X[42].f2);  // expected-error {{no member named 'f2'}}
21  x = __builtin_offsetof(int, X[42].f2);  // expected-error {{offsetof requires struct}}
22
23  int a[__builtin_offsetof(struct external_sun3_core, X) == 4 ? 1 : -1];
24  int b[__builtin_offsetof(struct external_sun3_core, X[42]) == 340 ? 1 : -1];
25  int c[__builtin_offsetof(struct external_sun3_core, X[42].f2) == 344 ? 1 : -1];  // expected-error {{no member named 'f2'}}
26}
27
28extern int f();
29
30struct s1 { int a; };
31int v1 = offsetof (struct s1, a) == 0 ? 0 : f();
32
33struct s2 { int a; };
34int v2 = (int)(&((struct s2 *) 0)->a) == 0 ? 0 : f();
35
36struct s3 { int a; };
37int v3 = __builtin_offsetof(struct s3, a) == 0 ? 0 : f();
38