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      1 // RUN: %clang_cc1 -triple x86_64-apple-darwin10.0.0 -fsyntax-only -verify %s -Winvalid-offsetof
      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