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// RUN: %clang_cc1 %s -triple=x86_64-pc-linux -emit-llvm -o %t
// RUN: %clang_cc1 %s -triple=x86_64-pc-linux -emit-llvm -std=c++03 -o %t.03
// RUN: %clang_cc1 %s -triple=x86_64-pc-linux -emit-llvm -std=c++11 -o %t.11
// RUN: %clang_cc1 %s -triple=x86_64-apple-darwin10 -disable-llvm-passes -O3 -emit-llvm -o %t.opt
// RUN: FileCheck %s < %t
// RUN: FileCheck %s < %t.03
// RUN: FileCheck %s < %t.11
// RUN: FileCheck --check-prefix=CHECK-OPT %s < %t.opt
namespace {
struct A {
virtual void f() { }
};
}
void f() { A b; }
struct B {
B();
virtual void f();
};
B::B() { }
struct C : virtual B {
C();
virtual void f() { }
};
C::C() { }
struct D {
virtual void f();
};
void D::f() { }
static struct : D { } e;
// Force 'e' to be constructed and therefore have a vtable defined.
void use_e() {
e.f();
}
// The destructor is the key function.
template<typename T>
struct E {
virtual ~E();
};
template<typename T> E<T>::~E() { }
// Anchor is the key function
template<>
struct E<char> {
virtual void anchor();
};
void E<char>::anchor() { }
template struct E<short>;
extern template struct E<int>;
void use_E() {
E<int> ei;
(void)ei;
E<long> el;
(void)el;
}
// No key function
template<typename T>
struct F {
virtual void foo() { }
};
// No key function
template<>
struct F<char> {
virtual void foo() { }
};
template struct F<short>;
extern template struct F<int>;
void use_F() {
F<char> fc;
fc.foo();
F<int> fi;
fi.foo();
F<long> fl;
(void)fl;
}
// B has a key function that is not defined in this translation unit so its vtable
// has external linkage.
// CHECK-DAG: @_ZTV1B = external unnamed_addr constant
// C has no key function, so its vtable should have weak_odr linkage
// and hidden visibility (rdar://problem/7523229).
// CHECK-DAG: @_ZTV1C = linkonce_odr unnamed_addr constant {{.*}}, comdat,
// CHECK-DAG: @_ZTS1C = linkonce_odr constant {{.*}}, comdat{{$}}
// CHECK-DAG: @_ZTI1C = linkonce_odr constant {{.*}}, comdat{{$}}
// CHECK-DAG: @_ZTT1C = linkonce_odr unnamed_addr constant {{.*}}, comdat{{$}}
// D has a key function that is defined in this translation unit so its vtable is
// defined in the translation unit.
// CHECK-DAG: @_ZTV1D = unnamed_addr constant
// CHECK-DAG: @_ZTS1D = constant
// CHECK-DAG: @_ZTI1D = constant
// E<char> is an explicit specialization with a key function defined
// in this translation unit, so its vtable should have external
// linkage.
// CHECK-DAG: @_ZTV1EIcE = unnamed_addr constant
// CHECK-DAG: @_ZTS1EIcE = constant
// CHECK-DAG: @_ZTI1EIcE = constant
// E<short> is an explicit template instantiation with a key function
// defined in this translation unit, so its vtable should have
// weak_odr linkage.
// CHECK-DAG: @_ZTV1EIsE = weak_odr unnamed_addr constant {{.*}}, comdat,
// CHECK-DAG: @_ZTS1EIsE = weak_odr constant {{.*}}, comdat{{$}}
// CHECK-DAG: @_ZTI1EIsE = weak_odr constant {{.*}}, comdat{{$}}
// F<short> is an explicit template instantiation without a key
// function, so its vtable should have weak_odr linkage
// CHECK-DAG: @_ZTV1FIsE = weak_odr unnamed_addr constant {{.*}}, comdat,
// CHECK-DAG: @_ZTS1FIsE = weak_odr constant {{.*}}, comdat{{$}}
// CHECK-DAG: @_ZTI1FIsE = weak_odr constant {{.*}}, comdat{{$}}
// E<long> is an implicit template instantiation with a key function
// defined in this translation unit, so its vtable should have
// linkonce_odr linkage.
// CHECK-DAG: @_ZTV1EIlE = linkonce_odr unnamed_addr constant {{.*}}, comdat,
// CHECK-DAG: @_ZTS1EIlE = linkonce_odr constant {{.*}}, comdat{{$}}
// CHECK-DAG: @_ZTI1EIlE = linkonce_odr constant {{.*}}, comdat{{$}}
// F<long> is an implicit template instantiation with no key function,
// so its vtable should have linkonce_odr linkage.
// CHECK-DAG: @_ZTV1FIlE = linkonce_odr unnamed_addr constant {{.*}}, comdat,
// CHECK-DAG: @_ZTS1FIlE = linkonce_odr constant {{.*}}, comdat{{$}}
// CHECK-DAG: @_ZTI1FIlE = linkonce_odr constant {{.*}}, comdat{{$}}
// F<int> is an explicit template instantiation declaration without a
// key function, so its vtable should have external linkage.
// CHECK-DAG: @_ZTV1FIiE = external unnamed_addr constant
// CHECK-OPT-DAG: @_ZTV1FIiE = available_externally unnamed_addr constant
// E<int> is an explicit template instantiation declaration. It has a
// key function is not instantiated, so we know that vtable definition
// will be generated in TU where key function will be defined
// so we can mark it as external (without optimizations) and
// available_externally (with optimizations) because all of the inline
// virtual functions have been emitted.
// CHECK-DAG: @_ZTV1EIiE = external unnamed_addr constant
// CHECK-OPT-DAG: @_ZTV1EIiE = available_externally unnamed_addr constant
// The anonymous struct for e has no linkage, so the vtable should have
// internal linkage.
// CHECK-DAG: @"_ZTV3$_0" = internal unnamed_addr constant
// CHECK-DAG: @"_ZTS3$_0" = internal constant
// CHECK-DAG: @"_ZTI3$_0" = internal constant
// The A vtable should have internal linkage since it is inside an anonymous
// namespace.
// CHECK-DAG: @_ZTVN12_GLOBAL__N_11AE = internal unnamed_addr constant
// CHECK-DAG: @_ZTSN12_GLOBAL__N_11AE = internal constant
// CHECK-DAG: @_ZTIN12_GLOBAL__N_11AE = internal constant
// F<char> is an explicit specialization without a key function, so
// its vtable should have linkonce_odr linkage.
// CHECK-DAG: @_ZTV1FIcE = linkonce_odr unnamed_addr constant {{.*}}, comdat,
// CHECK-DAG: @_ZTS1FIcE = linkonce_odr constant {{.*}}, comdat{{$}}
// CHECK-DAG: @_ZTI1FIcE = linkonce_odr constant {{.*}}, comdat{{$}}
// CHECK-DAG: @_ZTV1GIiE = linkonce_odr unnamed_addr constant {{.*}}, comdat,
template <typename T>
class G {
public:
G() {}
virtual void f0();
virtual void f1();
};
template <>
void G<int>::f1() {}
template <typename T>
void G<T>::f0() {}
void G_f0() { new G<int>(); }
// H<int> has a key function without a body but it's a template instantiation
// so its VTable must be emitted.
// CHECK-DAG: @_ZTV1HIiE = linkonce_odr unnamed_addr constant {{.*}}, comdat,
template <typename T>
class H {
public:
virtual ~H();
};
void use_H() {
H<int> h;
}
// I<int> has an explicit instantiation declaration and needs a VTT and
// construction vtables.
// CHECK-DAG: @_ZTV1IIiE = external unnamed_addr constant
// CHECK-DAG: @_ZTT1IIiE = external unnamed_addr constant
// CHECK-NOT: @_ZTC1IIiE
//
// CHECK-OPT-DAG: @_ZTV1IIiE = available_externally unnamed_addr constant
// CHECK-OPT-DAG: @_ZTT1IIiE = available_externally unnamed_addr constant
struct VBase1 { virtual void f(); }; struct VBase2 : virtual VBase1 {};
template<typename T>
struct I : VBase2 {};
extern template struct I<int>;
I<int> i;
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