73 lines
2.2 KiB
C
73 lines
2.2 KiB
C
|
// RUN: %clang_cc1 -Wno-pointer-to-int-cast -fsyntax-only -verify %s
|
||
|
|
|
||
|
|
#define offsetof(TYPE, MEMBER) __builtin_offsetof (TYPE, MEMBER)
|
||
|
|
|
||
|
|
typedef struct P { int i; float f; } PT;
|
||
|
|
struct external_sun3_core
|
||
|
|
{
|
||
|
|
unsigned c_regs;
|
||
|
|
|
||
|
|
PT X[100];
|
||
|
|
|
||
|
|
};
|
||
|
|
|
||
|
|
void swap()
|
||
|
|
{
|
||
|
|
int x;
|
||
|
|
x = offsetof(struct external_sun3_core, c_regs);
|
||
|
|
x = __builtin_offsetof(struct external_sun3_core, X[42].f);
|
||
|
|
|
||
|
|
x = __builtin_offsetof(struct external_sun3_core, X[42].f2); // expected-error {{no member named 'f2'}}
|
||
|
|
x = __builtin_offsetof(int, X[42].f2); // expected-error {{offsetof requires struct}}
|
||
|
|
|
||
|
|
int a[__builtin_offsetof(struct external_sun3_core, X) == 4 ? 1 : -1];
|
||
|
|
int b[__builtin_offsetof(struct external_sun3_core, X[42]) == 340 ? 1 : -1];
|
||
|
|
int c[__builtin_offsetof(struct external_sun3_core, X[42].f2) == 344 ? 1 : -1]; // expected-error {{no member named 'f2'}}
|
||
|
|
}
|
||
|
|
|
||
|
|
extern int f();
|
||
|
|
|
||
|
|
struct s1 { int a; };
|
||
|
|
int v1 = offsetof (struct s1, a) == 0 ? 0 : f();
|
||
|
|
|
||
|
|
struct s2 { int a; };
|
||
|
|
int v2 = (int)(&((struct s2 *) 0)->a) == 0 ? 0 : f();
|
||
|
|
|
||
|
|
struct s3 { int a; };
|
||
|
|
int v3 = __builtin_offsetof(struct s3, a) == 0 ? 0 : f();
|
||
|
|
|
||
|
|
// PR3396
|
||
|
|
struct sockaddr_un {
|
||
|
|
unsigned char sun_len;
|
||
|
|
char sun_path[104];
|
||
|
|
};
|
||
|
|
int a(int len) {
|
||
|
|
int a[__builtin_offsetof(struct sockaddr_un, sun_path[len+1])];
|
||
|
|
}
|
||
|
|
|
||
|
|
// PR4079
|
||
|
|
union x {struct {int x;};};
|
||
|
|
int x[__builtin_offsetof(union x, x)];
|
||
|
|
|
||
|
|
// rdar://problem/7222956
|
||
|
|
struct incomplete; // expected-note 2 {{forward declaration of 'struct incomplete'}}
|
||
|
|
int test1[__builtin_offsetof(struct incomplete, foo)]; // expected-error {{offsetof of incomplete type 'struct incomplete'}}
|
||
|
|
|
||
|
|
int test2[__builtin_offsetof(struct incomplete[10], [4].foo)]; // expected-error {{array has incomplete element type 'struct incomplete'}}
|
||
|
|
|
||
|
|
// Bitfields
|
||
|
|
struct has_bitfields {
|
||
|
|
int i : 7;
|
||
|
|
int j : 12; // expected-note{{bit-field is declared here}}
|
||
|
|
};
|
||
|
|
|
||
|
|
int test3 = __builtin_offsetof(struct has_bitfields, j); // expected-error{{cannot compute offset of bit-field 'j'}}
|
||
|
|
|
||
|
|
typedef struct Array { int array[1]; } Array;
|
||
|
|
int test4 = __builtin_offsetof(Array, array);
|
||
|
|
|
||
|
|
int test5() {
|
||
|
|
return __builtin_offsetof(Array, array[*(int*)0]); // expected-warning{{indirection of non-volatile null pointer}} expected-note{{__builtin_trap}}
|
||
|
|
}
|
||
|
|
|