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