1 // RUN: %clang_cc1 -triple x86_64-apple-darwin10.0.0 -fsyntax-only -verify %s -Winvalid-offsetof -std=c++98 2 3 struct NonPOD { 4 virtual void f(); 5 int m; 6 }; 7 8 struct P { 9 NonPOD fieldThatPointsToANonPODType; 10 }; 11 12 void f() { 13 int i = __builtin_offsetof(P, fieldThatPointsToANonPODType.m); // expected-warning{{offset of on non-POD type 'P'}} 14 } 15 16 struct Base { int x; }; 17 struct Derived : Base { int y; }; 18 int o = __builtin_offsetof(Derived, x); // expected-warning{{offset of on non-POD type}} 19 20 const int o2 = sizeof(__builtin_offsetof(Derived, x)); 21 22 struct HasArray { 23 int array[17]; 24 }; 25 26 // Constant and non-constant offsetof expressions 27 void test_ice(int i) { 28 int array0[__builtin_offsetof(HasArray, array[5])]; 29 int array1[__builtin_offsetof(HasArray, array[i])]; 30 } 31 32 // Bitfields 33 struct has_bitfields { 34 int i : 7; 35 int j : 12; // expected-note{{bit-field is declared here}} 36 }; 37 38 int 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. 41 struct Base1 { 42 int x; 43 }; 44 45 struct Base2 { 46 int y; 47 }; 48 49 struct Derived2 : public Base1, public Base2 { 50 int z; 51 }; 52 53 int derived1[__builtin_offsetof(Derived2, x) == 0? 1 : -1]; 54 int derived2[__builtin_offsetof(Derived2, y) == 4? 1 : -1]; 55 int derived3[__builtin_offsetof(Derived2, z) == 8? 1 : -1]; 56 57 // offsetof referring to anonymous struct in base. 58 // PR7769 59 struct foo { 60 struct { 61 int x; 62 }; 63 }; 64 65 struct bar : public foo { 66 }; 67 68 int anonstruct[__builtin_offsetof(bar, x) == 0 ? 1 : -1]; 69 70 struct LtoRCheck { 71 int a[10]; 72 int f(); 73 }; 74 int ltor = __builtin_offsetof(struct LtoRCheck, a[LtoRCheck().f]); // \ 75 expected-error {{reference to non-static member function must be called}} 76 77 namespace PR17578 { 78 struct Base { 79 int Field; 80 }; 81 struct Derived : virtual Base { 82 void Fun() { (void)__builtin_offsetof(Derived, Field); } // expected-warning {{offset of on non-POD type}} \ 83 expected-error {{invalid application of 'offsetof' to a field of a virtual base}} 84 }; 85 } 86
