microsoft-abi-vtables-ambiguous.cpp
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// RUN: %clang_cc1 %s -emit-llvm-only -triple=i386-pc-win32 -verify -DTEST1
// RUN: %clang_cc1 %s -emit-llvm-only -triple=i386-pc-win32 -verify -DTEST2
#ifdef TEST1
struct A {
virtual A *foo(); // in vftable slot #0.
virtual A *bar(); // in vftable slot #1.
};
struct B : virtual A {
// appended to the A subobject's vftable in slot #2.
virtual B *foo(); // expected-note{{covariant thunk required by 'foo'}}
};
struct C : virtual A {
// appended to the A subobject's vftable in slot #2.
virtual C *bar(); // expected-note{{covariant thunk required by 'bar'}}
};
struct D : B, C { D(); }; // expected-error{{ambiguous vftable component}}
D::D() {}
#endif
#ifdef TEST2
struct A {
virtual A *foo(); // in vftable slot #0
};
struct B : virtual A {
// appended to the A subobject's vftable in slot #1.
virtual B *foo(); // expected-note{{covariant thunk required by 'foo'}}
};
struct C : virtual A {
// appended to the A subobject's vftable in slot #1.
virtual C *foo(); // expected-note{{covariant thunk required by 'foo'}}
};
struct D : B, C { // expected-error{{ambiguous vftable component}}
virtual D *foo();
D();
};
D::D() {}
#endif