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llvm-project/clang/test/CodeGenCXX/vtable-layout-abi-examples.cpp

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// RUN: %clang_cc1 %s -triple=x86_64-apple-darwin10 -emit-llvm-only -fdump-vtable-layouts > %t 2>/dev/null
// RUN: FileCheck --check-prefix=CHECK-1 %s < %t
// RUN: FileCheck --check-prefix=CHECK-2 %s < %t
// RUN: FileCheck --check-prefix=CHECK-3 %s < %t
// RUN: FileCheck --check-prefix=CHECK-4 %s < %t
// RUN: FileCheck --check-prefix=CHECK-5 %s < %t
// RUN: FileCheck --check-prefix=CHECK-6 %s < %t
// RUN: FileCheck --check-prefix=CHECK-7 %s < %t
// RUN: FileCheck --check-prefix=CHECK-8 %s < %t
// RUN: FileCheck --check-prefix=CHECK-9 %s < %t
// RUN: FileCheck --check-prefix=CHECK-10 %s < %t
// RUN: FileCheck --check-prefix=CHECK-11 %s < %t
/// Examples from the Itanium C++ ABI specification.
/// http://www.codesourcery.com/public/cxx-abi/
namespace Test1 {
// This is from http://www.codesourcery.com/public/cxx-abi/cxx-vtable-ex.html
// CHECK-1: Vtable for 'Test1::A' (5 entries).
// CHECK-1-NEXT: 0 | offset_to_top (0)
// CHECK-1-NEXT: 1 | Test1::A RTTI
// CHECK-1-NEXT: -- (Test1::A, 0) vtable address --
// CHECK-1-NEXT: 2 | void Test1::A::f()
// CHECK-1-NEXT: 3 | void Test1::A::g()
// CHECK-1-NEXT: 4 | void Test1::A::h()
struct A {
virtual void f ();
virtual void g ();
virtual void h ();
int ia;
};
void A::f() {}
// CHECK-2: Vtable for 'Test1::B' (13 entries).
// CHECK-2-NEXT: 0 | vbase_offset (16)
// CHECK-2-NEXT: 1 | offset_to_top (0)
// CHECK-2-NEXT: 2 | Test1::B RTTI
// CHECK-2-NEXT: -- (Test1::B, 0) vtable address --
// CHECK-2-NEXT: 3 | void Test1::B::f()
// CHECK-2-NEXT: 4 | void Test1::B::h()
// CHECK-2-NEXT: 5 | vcall_offset (-16)
// CHECK-2-NEXT: 6 | vcall_offset (0)
// CHECK-2-NEXT: 7 | vcall_offset (-16)
// CHECK-2-NEXT: 8 | offset_to_top (-16)
// CHECK-2-NEXT: 9 | Test1::B RTTI
// CHECK-2-NEXT: -- (Test1::A, 16) vtable address --
// CHECK-2-NEXT: 10 | void Test1::B::f()
// CHECK-2-NEXT: [this adjustment: 0 non-virtual, -24 vcall offset offset]
// CHECK-2-NEXT: 11 | void Test1::A::g()
// CHECK-2-NEXT: 12 | void Test1::B::h()
// CHECK-2-NEXT: [this adjustment: 0 non-virtual, -40 vcall offset offset]
struct B: public virtual A {
void f ();
void h ();
int ib;
};
void B::f() {}
// CHECK-3: Vtable for 'Test1::C' (13 entries).
// CHECK-3-NEXT: 0 | vbase_offset (16)
// CHECK-3-NEXT: 1 | offset_to_top (0)
// CHECK-3-NEXT: 2 | Test1::C RTTI
// CHECK-3-NEXT: -- (Test1::C, 0) vtable address --
// CHECK-3-NEXT: 3 | void Test1::C::g()
// CHECK-3-NEXT: 4 | void Test1::C::h()
// CHECK-3-NEXT: 5 | vcall_offset (-16)
// CHECK-3-NEXT: 6 | vcall_offset (-16)
// CHECK-3-NEXT: 7 | vcall_offset (0)
// CHECK-3-NEXT: 8 | offset_to_top (-16)
// CHECK-3-NEXT: 9 | Test1::C RTTI
// CHECK-3-NEXT: -- (Test1::A, 16) vtable address --
// CHECK-3-NEXT: 10 | void Test1::A::f()
// CHECK-3-NEXT: 11 | void Test1::C::g()
// CHECK-3-NEXT: [this adjustment: 0 non-virtual, -32 vcall offset offset]
// CHECK-3-NEXT: 12 | void Test1::C::h()
// CHECK-3-NEXT: [this adjustment: 0 non-virtual, -40 vcall offset offset]
struct C: public virtual A {
void g ();
void h ();
int ic;
};
void C::g() {}
// CHECK-4: Vtable for 'Test1::D' (18 entries).
// CHECK-4-NEXT: 0 | vbase_offset (32)
// CHECK-4-NEXT: 1 | offset_to_top (0)
// CHECK-4-NEXT: 2 | Test1::D RTTI
// CHECK-4-NEXT: -- (Test1::B, 0) vtable address --
// CHECK-4-NEXT: -- (Test1::D, 0) vtable address --
// CHECK-4-NEXT: 3 | void Test1::B::f()
// CHECK-4-NEXT: 4 | void Test1::D::h()
// CHECK-4-NEXT: 5 | vbase_offset (16)
// CHECK-4-NEXT: 6 | offset_to_top (-16)
// CHECK-4-NEXT: 7 | Test1::D RTTI
// CHECK-4-NEXT: -- (Test1::C, 16) vtable address --
// CHECK-4-NEXT: 8 | void Test1::C::g()
// CHECK-4-NEXT: 9 | void Test1::D::h()
// CHECK-4-NEXT: [this adjustment: -16 non-virtual]
// CHECK-4-NEXT: 10 | vcall_offset (-32)
// CHECK-4-NEXT: 11 | vcall_offset (-16)
// CHECK-4-NEXT: 12 | vcall_offset (-32)
// CHECK-4-NEXT: 13 | offset_to_top (-32)
// CHECK-4-NEXT: 14 | Test1::D RTTI
// CHECK-4-NEXT: -- (Test1::A, 32) vtable address --
// CHECK-4-NEXT: 15 | void Test1::B::f()
// CHECK-4-NEXT: [this adjustment: 0 non-virtual, -24 vcall offset offset]
// CHECK-4-NEXT: 16 | void Test1::C::g()
// CHECK-4-NEXT: [this adjustment: 0 non-virtual, -32 vcall offset offset]
// CHECK-4-NEXT: 17 | void Test1::D::h()
// CHECK-4-NEXT: [this adjustment: 0 non-virtual, -40 vcall offset offset]
struct D: public B, public C {
void h ();
int id;
};
void D::h() { }
struct X {
int ix;
virtual void x();
};
// CHECK-5: Vtable for 'Test1::E' (24 entries).
// CHECK-5-NEXT: 0 | vbase_offset (56)
// CHECK-5-NEXT: 1 | offset_to_top (0)
// CHECK-5-NEXT: 2 | Test1::E RTTI
// CHECK-5-NEXT: -- (Test1::E, 0) vtable address --
// CHECK-5-NEXT: -- (Test1::X, 0) vtable address --
// CHECK-5-NEXT: 3 | void Test1::X::x()
// CHECK-5-NEXT: 4 | void Test1::E::f()
// CHECK-5-NEXT: 5 | void Test1::E::h()
// CHECK-5-NEXT: 6 | vbase_offset (40)
// CHECK-5-NEXT: 7 | offset_to_top (-16)
// CHECK-5-NEXT: 8 | Test1::E RTTI
// CHECK-5-NEXT: -- (Test1::B, 16) vtable address --
// CHECK-5-NEXT: -- (Test1::D, 16) vtable address --
// CHECK-5-NEXT: 9 | void Test1::E::f()
// CHECK-5-NEXT: [this adjustment: -16 non-virtual]
// CHECK-5-NEXT: 10 | void Test1::E::h()
// CHECK-5-NEXT: [this adjustment: -16 non-virtual]
// CHECK-5-NEXT: 11 | vbase_offset (24)
// CHECK-5-NEXT: 12 | offset_to_top (-32)
// CHECK-5-NEXT: 13 | Test1::E RTTI
// CHECK-5-NEXT: -- (Test1::C, 32) vtable address --
// CHECK-5-NEXT: 14 | void Test1::C::g()
// CHECK-5-NEXT: 15 | void Test1::E::h()
// CHECK-5-NEXT: [this adjustment: -32 non-virtual]
// CHECK-5-NEXT: 16 | vcall_offset (-56)
// CHECK-5-NEXT: 17 | vcall_offset (-24)
// CHECK-5-NEXT: 18 | vcall_offset (-56)
// CHECK-5-NEXT: 19 | offset_to_top (-56)
// CHECK-5-NEXT: 20 | Test1::E RTTI
// CHECK-5-NEXT: -- (Test1::A, 56) vtable address --
// CHECK-5-NEXT: 21 | void Test1::E::f()
// CHECK-5-NEXT: [this adjustment: 0 non-virtual, -24 vcall offset offset]
// CHECK-5-NEXT: 22 | void Test1::C::g()
// CHECK-5-NEXT: [this adjustment: 0 non-virtual, -32 vcall offset offset]
// CHECK-5-NEXT: 23 | void Test1::E::h()
// CHECK-5-NEXT: [this adjustment: 0 non-virtual, -40 vcall offset offset]
struct E : X, D {
int ie;
void f();
void h ();
};
void E::f() { }
}
namespace Test2 {
// From http://www.codesourcery.com/public/cxx-abi/abi.html#class-types.
struct A { virtual void f(); };
struct B : virtual public A { int i; };
struct C : virtual public A { int j; };
// CHECK-6: Vtable for 'Test2::D' (11 entries).
// CHECK-6-NEXT: 0 | vbase_offset (0)
// CHECK-6-NEXT: 1 | vcall_offset (0)
// CHECK-6-NEXT: 2 | offset_to_top (0)
// CHECK-6-NEXT: 3 | Test2::D RTTI
// CHECK-6-NEXT: -- (Test2::A, 0) vtable address --
// CHECK-6-NEXT: -- (Test2::B, 0) vtable address --
// CHECK-6-NEXT: -- (Test2::D, 0) vtable address --
// CHECK-6-NEXT: 4 | void Test2::A::f()
// CHECK-6-NEXT: 5 | void Test2::D::d()
// CHECK-6-NEXT: 6 | vbase_offset (-16)
// CHECK-6-NEXT: 7 | vcall_offset (-16)
// CHECK-6-NEXT: 8 | offset_to_top (-16)
// CHECK-6-NEXT: 9 | Test2::D RTTI
// CHECK-6-NEXT: -- (Test2::C, 16) vtable address --
// CHECK-6-NEXT: 10 | [unused] void Test2::A::f()
struct D : public B, public C {
virtual void d();
};
void D::d() { }
}
namespace Test3 {
// From http://www.codesourcery.com/public/cxx-abi/abi-examples.html#vtable-ctor
struct V1 {
int v1;
virtual void f();
};
struct V2 : virtual V1 {
int v2;
virtual void f();
};
// CHECK-7: Vtable for 'Test3::C' (14 entries).
// CHECK-7-NEXT: 0 | vbase_offset (32)
// CHECK-7-NEXT: 1 | vbase_offset (16)
// CHECK-7-NEXT: 2 | offset_to_top (0)
// CHECK-7-NEXT: 3 | Test3::C RTTI
// CHECK-7-NEXT: -- (Test3::C, 0) vtable address --
// CHECK-7-NEXT: 4 | void Test3::C::f()
// CHECK-7-NEXT: 5 | vcall_offset (-16)
// CHECK-7-NEXT: 6 | offset_to_top (-16)
// CHECK-7-NEXT: 7 | Test3::C RTTI
// CHECK-7-NEXT: -- (Test3::V1, 16) vtable address --
// CHECK-7-NEXT: 8 | void Test3::C::f()
// CHECK-7-NEXT: [this adjustment: 0 non-virtual, -24 vcall offset offset]
// CHECK-7-NEXT: 9 | vcall_offset (-32)
// CHECK-7-NEXT: 10 | vbase_offset (-16)
// CHECK-7-NEXT: 11 | offset_to_top (-32)
// CHECK-7-NEXT: 12 | Test3::C RTTI
// CHECK-7-NEXT: -- (Test3::V2, 32) vtable address --
// CHECK-7-NEXT: 13 | void Test3::C::f()
// CHECK-7-NEXT: [this adjustment: 0 non-virtual, -32 vcall offset offset]
// CHECK-8: Construction vtable for ('Test3::V2', 32) in 'Test3::C' (9 entries).
// CHECK-8-NEXT: 0 | vcall_offset (0)
// CHECK-8-NEXT: 1 | vbase_offset (-16)
// CHECK-8-NEXT: 2 | offset_to_top (0)
// CHECK-8-NEXT: 3 | Test3::V2 RTTI
// CHECK-8-NEXT: -- (Test3::V2, 32) vtable address --
// CHECK-8-NEXT: 4 | void Test3::V2::f()
// CHECK-8-NEXT: 5 | vcall_offset (16)
// CHECK-8-NEXT: 6 | offset_to_top (16)
// CHECK-8-NEXT: 7 | Test3::V2 RTTI
// CHECK-8-NEXT: -- (Test3::V1, 16) vtable address --
// CHECK-8-NEXT: 8 | void Test3::V2::f()
// CHECK-8-NEXT: [this adjustment: 0 non-virtual, -24 vcall offset offset]
struct C : virtual V1, virtual V2 {
int c;
virtual void f();
};
void C::f() { }
struct B {
int b;
};
// CHECK-9: Vtable for 'Test3::D' (15 entries).
// CHECK-9-NEXT: 0 | vbase_offset (40)
// CHECK-9-NEXT: 1 | vbase_offset (24)
// CHECK-9-NEXT: 2 | offset_to_top (0)
// CHECK-9-NEXT: 3 | Test3::D RTTI
// CHECK-9-NEXT: -- (Test3::C, 0) vtable address --
// CHECK-9-NEXT: -- (Test3::D, 0) vtable address --
// CHECK-9-NEXT: 4 | void Test3::C::f()
// CHECK-9-NEXT: 5 | void Test3::D::g()
// CHECK-9-NEXT: 6 | vcall_offset (-24)
// CHECK-9-NEXT: 7 | offset_to_top (-24)
// CHECK-9-NEXT: 8 | Test3::D RTTI
// CHECK-9-NEXT: -- (Test3::V1, 24) vtable address --
// CHECK-9-NEXT: 9 | void Test3::C::f()
// CHECK-9-NEXT: [this adjustment: 0 non-virtual, -24 vcall offset offset]
// CHECK-9-NEXT: 10 | vcall_offset (-40)
// CHECK-9-NEXT: 11 | vbase_offset (-16)
// CHECK-9-NEXT: 12 | offset_to_top (-40)
// CHECK-9-NEXT: 13 | Test3::D RTTI
// CHECK-9-NEXT: -- (Test3::V2, 40) vtable address --
// CHECK-9-NEXT: 14 | void Test3::C::f()
// CHECK-9-NEXT: [this adjustment: 0 non-virtual, -32 vcall offset offset]
// CHECK-10: Construction vtable for ('Test3::C', 0) in 'Test3::D' (14 entries).
// CHECK-10-NEXT: 0 | vbase_offset (40)
// CHECK-10-NEXT: 1 | vbase_offset (24)
// CHECK-10-NEXT: 2 | offset_to_top (0)
// CHECK-10-NEXT: 3 | Test3::C RTTI
// CHECK-10-NEXT: -- (Test3::C, 0) vtable address --
// CHECK-10-NEXT: 4 | void Test3::C::f()
// CHECK-10-NEXT: 5 | vcall_offset (-24)
// CHECK-10-NEXT: 6 | offset_to_top (-24)
// CHECK-10-NEXT: 7 | Test3::C RTTI
// CHECK-10-NEXT: -- (Test3::V1, 24) vtable address --
// CHECK-10-NEXT: 8 | void Test3::C::f()
// CHECK-10-NEXT: [this adjustment: 0 non-virtual, -24 vcall offset offset]
// CHECK-10-NEXT: 9 | vcall_offset (-40)
// CHECK-10-NEXT: 10 | vbase_offset (-16)
// CHECK-10-NEXT: 11 | offset_to_top (-40)
// CHECK-10-NEXT: 12 | Test3::C RTTI
// CHECK-10-NEXT: -- (Test3::V2, 40) vtable address --
// CHECK-10-NEXT: 13 | void Test3::C::f()
// CHECK-10-NEXT: [this adjustment: 0 non-virtual, -32 vcall offset offset]
// CHECK-11: Construction vtable for ('Test3::V2', 40) in 'Test3::D' (9 entries).
// CHECK-11-NEXT: 0 | vcall_offset (0)
// CHECK-11-NEXT: 1 | vbase_offset (-16)
// CHECK-11-NEXT: 2 | offset_to_top (0)
// CHECK-11-NEXT: 3 | Test3::V2 RTTI
// CHECK-11-NEXT: -- (Test3::V2, 40) vtable address --
// CHECK-11-NEXT: 4 | void Test3::V2::f()
// CHECK-11-NEXT: 5 | vcall_offset (16)
// CHECK-11-NEXT: 6 | offset_to_top (16)
// CHECK-11-NEXT: 7 | Test3::V2 RTTI
// CHECK-11-NEXT: -- (Test3::V1, 24) vtable address --
// CHECK-11-NEXT: 8 | void Test3::V2::f()
// CHECK-11-NEXT: [this adjustment: 0 non-virtual, -24 vcall offset offset]
struct D : B, C {
int d;
virtual void g();
};
void D::g() { }
}
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