1// RUN: %clang_cc1 -triple x86_64-apple-darwin10.0.0 -fsyntax-only -verify %s -Winvalid-offsetof 2 3struct NonPOD { 4 virtual void f(); 5 int m; 6}; 7 8struct P { 9 NonPOD fieldThatPointsToANonPODType; 10}; 11 12void f() { 13 int i = __builtin_offsetof(P, fieldThatPointsToANonPODType.m); // expected-warning{{offset of on non-POD type 'P'}} 14} 15 16struct Base { int x; }; 17struct Derived : Base { int y; }; 18int o = __builtin_offsetof(Derived, x); // expected-warning{{offset of on non-POD type}} 19 20const int o2 = sizeof(__builtin_offsetof(Derived, x)); 21 22struct HasArray { 23 int array[17]; 24}; 25 26// Constant and non-constant offsetof expressions 27void test_ice(int i) { 28 int array0[__builtin_offsetof(HasArray, array[5])]; 29 int array1[__builtin_offsetof(HasArray, array[i])]; 30} 31 32// Bitfields 33struct has_bitfields { 34 int i : 7; 35 int j : 12; // expected-note{{bit-field is declared here}} 36}; 37 38int test3 = __builtin_offsetof(struct has_bitfields, j); // expected-error{{cannot compute offset of bit-field 'j'}} 39 40// offsetof referring to members of a base class. 41struct Base1 { 42 int x; 43}; 44 45struct Base2 { 46 int y; 47}; 48 49struct Derived2 : public Base1, public Base2 { 50 int z; 51}; 52 53int derived1[__builtin_offsetof(Derived2, x) == 0? 1 : -1]; 54int derived2[__builtin_offsetof(Derived2, y) == 4? 1 : -1]; 55int derived3[__builtin_offsetof(Derived2, z) == 8? 1 : -1]; 56 57// offsetof referring to anonymous struct in base. 58// PR7769 59struct foo { 60 struct { 61 int x; 62 }; 63}; 64 65struct bar : public foo { 66}; 67 68int anonstruct[__builtin_offsetof(bar, x) == 0 ? 1 : -1]; 69 70struct LtoRCheck { 71 int a[10]; 72 int f(); 73}; 74int ltor = __builtin_offsetof(struct LtoRCheck, a[LtoRCheck().f]); // \ 75 expected-error {{reference to non-static member function must be called}} 76