| // 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}} |
| } |
| |