llvm-project/clang/test/CodeGenCXX/microsoft-abi-vtables-virtu...

605 lines
16 KiB
C++

// RUN: %clang_cc1 -fno-rtti -emit-llvm -o %t.ll -fdump-vtable-layouts %s -triple=i386-pc-win32 >%t
// RUN: FileCheck --check-prefix=VTABLE-C %s < %t
// RUN: FileCheck --check-prefix=VTABLE-D %s < %t
// RUN: FileCheck --check-prefix=TEST1 %s < %t
// RUN: FileCheck --check-prefix=TEST2 %s < %t
// RUN: FileCheck --check-prefix=TEST3 %s < %t
// RUN: FileCheck --check-prefix=TEST4 %s < %t
// RUN: FileCheck --check-prefix=TEST5 %s < %t
// RUN: FileCheck --check-prefix=TEST6 %s < %t
// RUN: FileCheck --check-prefix=TEST7 %s < %t
// RUN: FileCheck --check-prefix=TEST8-X %s < %t
// RUN: FileCheck --check-prefix=TEST8-Z %s < %t
// RUN: FileCheck --check-prefix=TEST9-Y %s < %t
// RUN: FileCheck --check-prefix=TEST9-Z %s < %t
// RUN: FileCheck --check-prefix=TEST9-W %s < %t
// RUN: FileCheck --check-prefix=TEST9-T %s < %t
// RUN: FileCheck --check-prefix=TEST10 %s < %t
// RUN: FileCheck --check-prefix=VDTORS-Y %s < %t
// RUN: FileCheck --check-prefix=VDTORS-U %s < %t
// RUN: FileCheck --check-prefix=VDTORS-V %s < %t
// RUN: FileCheck --check-prefix=VDTORS-P %s < %t
// RUN: FileCheck --check-prefix=RET-W %s < %t
// RUN: FileCheck --check-prefix=RET-T %s < %t
// RUN: FileCheck --check-prefix=RET-V %s < %t
// RUN: FileCheck --check-prefix=MANGLING %s < %t.ll
struct Empty { };
struct A {
virtual void f();
virtual void z(); // Useful to check there are no thunks for f() when appropriate.
};
struct B {
virtual void g();
};
struct C: virtual A {
// VTABLE-C: VFTable for 'A' in 'C' (2 entries)
// VTABLE-C-NEXT: 0 | void C::f()
// VTABLE-C-NEXT: 1 | void A::z()
// VTABLE-C: VFTable indices for 'C' (1 entry)
// VTABLE-C-NEXT: vbtable index 1, vfptr at offset 0
// VTABLE-C-NEXT: 0 | void C::f()
// MANGLING-DAG: @"\01??_7C@@6B@"
virtual void f();
};
C c;
struct D: virtual A {
// VTABLE-D: VFTable for 'D' (1 entry).
// VTABLE-D-NEXT: 0 | void D::h()
// VTABLE-D: VFTable for 'A' in 'D' (2 entries).
// VTABLE-D-NEXT: 0 | void D::f()
// VTABLE-D-NEXT: 1 | void A::z()
// VTABLE-D: VFTable indices for 'D' (2 entries).
// VTABLE-D-NEXT: via vfptr at offset 0
// VTABLE-D-NEXT: 0 | void D::h()
// VTABLE-D-NEXT: via vbtable index 1, vfptr at offset 0
// VTABLE-D-NEXT: 0 | void D::f()
// MANGLING-DAG: @"\01??_7D@@6B0@@"
// MANGLING-DAG: @"\01??_7D@@6BA@@@"
virtual void f();
virtual void h();
};
void D::h() {}
D d;
namespace Test1 {
struct X { int x; };
// X and A get reordered in the layout since X doesn't have a vfptr while A has.
struct Y : X, A { };
// MANGLING-DAG: @"\01??_7Y@Test1@@6B@"
struct Z : virtual Y {
// TEST1: VFTable for 'A' in 'Test1::Y' in 'Test1::Z' (2 entries).
// TEST1-NEXT: 0 | void A::f()
// TEST1-NEXT: 1 | void A::z()
// TEST1-NOT: VFTable indices for 'Test1::Z'
// MANGLING-DAG: @"\01??_7Z@Test1@@6B@"
};
Z z;
}
namespace Test2 {
struct X: virtual A, virtual B {
// TEST2: VFTable for 'Test2::X' (1 entry).
// TEST2-NEXT: 0 | void Test2::X::h()
// TEST2: VFTable for 'A' in 'Test2::X' (2 entries).
// TEST2-NEXT: 0 | void A::f()
// TEST2-NEXT: 1 | void A::z()
// TEST2: VFTable for 'B' in 'Test2::X' (1 entry).
// TEST2-NEXT: 0 | void B::g()
// TEST2: VFTable indices for 'Test2::X' (1 entry).
// TEST2-NEXT: 0 | void Test2::X::h()
// MANGLING-DAG: @"\01??_7X@Test2@@6B01@@"
// MANGLING-DAG: @"\01??_7X@Test2@@6BA@@@"
// MANGLING-DAG: @"\01??_7X@Test2@@6BB@@@"
virtual void h();
};
X x;
}
namespace Test3 {
struct X : virtual A {
// MANGLING-DAG: @"\01??_7X@Test3@@6B@"
};
struct Y: virtual X {
// TEST3: VFTable for 'A' in 'Test3::X' in 'Test3::Y' (2 entries).
// TEST3-NEXT: 0 | void A::f()
// TEST3-NEXT: 1 | void A::z()
// TEST3-NOT: VFTable indices for 'Test3::Y'
// MANGLING-DAG: @"\01??_7Y@Test3@@6B@"
};
Y y;
}
namespace Test4 {
struct X: virtual C {
// This one's interesting. C::f expects (A*) to be passed as 'this' and does
// ECX-=4 to cast to (C*). In X, C and A vbases are reordered, so the thunk
// should pass a pointer to the end of X in order
// for ECX-=4 to point at the C part.
// TEST4: VFTable for 'A' in 'C' in 'Test4::X' (2 entries).
// TEST4-NEXT: 0 | void C::f()
// TEST4-NEXT: [this adjustment: 8 non-virtual]
// TEST4-NEXT: 1 | void A::z()
// TEST4-NOT: VFTable indices for 'Test4::X'
// MANGLING-DAG: @"\01??_7X@Test4@@6B@"
// Also check the mangling of the thunk.
// MANGLING-DAG: define weak x86_thiscallcc void @"\01?f@C@@WPPPPPPPI@AEXXZ"
};
X x;
}
namespace Test5 {
// New methods are added to the base's vftable.
struct X : A {
// MANGLING-DAG: @"\01??_7X@Test5@@6B@"
virtual void g();
};
struct Y : virtual X {
// TEST5: VFTable for 'Test5::Y' (1 entry).
// TEST5-NEXT: 0 | void Test5::Y::h()
// TEST5: VFTable for 'A' in 'Test5::X' in 'Test5::Y' (3 entries).
// TEST5-NEXT: 0 | void A::f()
// TEST5-NEXT: 1 | void A::z()
// TEST5-NEXT: 2 | void Test5::X::g()
// TEST5: VFTable indices for 'Test5::Y' (1 entry).
// TEST5-NEXT: 0 | void Test5::Y::h()
// MANGLING-DAG: @"\01??_7Y@Test5@@6B01@@"
// MANGLING-DAG: @"\01??_7Y@Test5@@6BX@1@@"
virtual void h();
};
Y y;
}
namespace Test6 {
struct X : A, virtual Empty {
// TEST6: VFTable for 'A' in 'Test6::X' (2 entries).
// TEST6-NEXT: 0 | void A::f()
// TEST6-NEXT: 1 | void A::z()
// TEST6-NOT: VFTable indices for 'Test6::X'
// MANGLING-DAG: @"\01??_7X@Test6@@6B@"
};
X x;
}
namespace Test7 {
struct X : C {
// MANGLING-DAG: @"\01??_7X@Test7@@6B@"
};
struct Y : virtual X {
// TEST7: VFTable for 'A' in 'C' in 'Test7::X' in 'Test7::Y' (2 entries).
// TEST7-NEXT: 0 | void C::f()
// TEST7-NEXT: [this adjustment: 8 non-virtual]
// TEST7-NEXT: 1 | void A::z()
// TEST7: Thunks for 'void C::f()' (1 entry).
// TEST7-NEXT: 0 | [this adjustment: 8 non-virtual]
// TEST7-NOT: VFTable indices for 'Test7::Y'
// MANGLING-DAG: @"\01??_7Y@Test7@@6B@"
};
Y y;
}
namespace Test8 {
// This is a typical diamond inheritance with a shared 'A' vbase.
struct X : D, C {
// TEST8-X: VFTable for 'D' in 'Test8::X' (1 entry).
// TEST8-X-NEXT: 0 | void D::h()
// TEST8-X: VFTable for 'A' in 'D' in 'Test8::X' (2 entries).
// TEST8-X-NEXT: 0 | void Test8::X::f()
// TEST8-X-NEXT: 1 | void A::z()
// TEST8-X: VFTable indices for 'Test8::X' (1 entry).
// TEST8-X-NEXT: via vbtable index 1, vfptr at offset 0
// TEST8-X-NEXT: 0 | void Test8::X::f()
// MANGLING-DAG: @"\01??_7X@Test8@@6BA@@@"
// MANGLING-DAG: @"\01??_7X@Test8@@6BD@@@"
virtual void f();
};
X x;
// Another diamond inheritance which led to AST crashes.
struct Y : virtual A {};
class Z : Y, C {
// TEST8-Z: VFTable for 'A' in 'Test8::Y' in 'Test8::Z' (2 entries).
// TEST8-Z-NEXT: 0 | void Test8::Z::f()
// TEST8-Z-NEXT: 1 | void A::z()
// TEST8-Z: VFTable indices for 'Test8::Z' (1 entry).
// TEST8-Z-NEXT: via vbtable index 1, vfptr at offset 0
// TEST8-Z-NEXT: 0 | void Test8::Z::f()
virtual void f();
};
Z z;
}
namespace Test9 {
struct X : A { };
struct Y : virtual X {
// TEST9-Y: VFTable for 'Test9::Y' (1 entry).
// TEST9-Y-NEXT: 0 | void Test9::Y::h()
// TEST9-Y: VFTable for 'A' in 'Test9::X' in 'Test9::Y' (2 entries).
// TEST9-Y-NEXT: 0 | void A::f()
// TEST9-Y-NEXT: 1 | void A::z()
// TEST9-Y: VFTable indices for 'Test9::Y' (1 entry).
// TEST9-Y-NEXT: 0 | void Test9::Y::h()
// MANGLING-DAG: @"\01??_7Y@Test9@@6B01@@"
// MANGLING-DAG: @"\01??_7Y@Test9@@6BX@1@@"
virtual void h();
};
Y y;
struct Z : Y, virtual B {
// TEST9-Z: VFTable for 'Test9::Y' in 'Test9::Z' (1 entry).
// TEST9-Z-NEXT: 0 | void Test9::Y::h()
// TEST9-Z: VFTable for 'A' in 'Test9::X' in 'Test9::Y' in 'Test9::Z' (2 entries).
// TEST9-Z-NEXT: 0 | void A::f()
// TEST9-Z-NEXT: 1 | void A::z()
// TEST9-Z: VFTable for 'B' in 'Test9::Z' (1 entry).
// TEST9-Z-NEXT: 0 | void B::g()
// TEST9-Z-NOT: VFTable indices for 'Test9::Z'
// MANGLING-DAG: @"\01??_7Z@Test9@@6BX@1@@"
// MANGLING-DAG: @"\01??_7Z@Test9@@6BY@1@@"
// MANGLING-DAG: @"\01??_7Z@Test9@@6B@"
};
Z z;
struct W : Z, D, virtual A, virtual B {
// TEST9-W: VFTable for 'Test9::Y' in 'Test9::Z' in 'Test9::W' (1 entry).
// TEST9-W-NEXT: 0 | void Test9::Y::h()
// TEST9-W: VFTable for 'A' in 'Test9::X' in 'Test9::Y' in 'Test9::Z' in 'Test9::W' (2 entries).
// TEST9-W-NEXT: 0 | void A::f()
// TEST9-W-NEXT: 1 | void A::z()
// TEST9-W: VFTable for 'B' in 'Test9::Z' in 'Test9::W' (1 entry).
// TEST9-W-NEXT: 0 | void B::g()
// TEST9-W: VFTable for 'D' in 'Test9::W' (1 entry).
// TEST9-W-NEXT: 0 | void D::h()
// TEST9-W: VFTable for 'A' in 'D' in 'Test9::W' (2 entries).
// TEST9-W-NEXT: 0 | void D::f()
// TEST9-W-NEXT: [this adjustment: -8 non-virtual]
// TEST9-W-NEXT: 1 | void A::z()
// TEST9-W: Thunks for 'void D::f()' (1 entry).
// TEST9-W-NEXT: 0 | [this adjustment: -8 non-virtual]
// TEST9-W-NOT: VFTable indices for 'Test9::W'
// MANGLING-DAG: @"\01??_7W@Test9@@6BA@@@"
// MANGLING-DAG: @"\01??_7W@Test9@@6BD@@@"
// MANGLING-DAG: @"\01??_7W@Test9@@6BX@1@@"
// MANGLING-DAG: @"\01??_7W@Test9@@6B@"
// MANGLING-DAG: @"\01??_7W@Test9@@6BY@1@@"
};
W w;
struct T : Z, D, virtual A, virtual B {
// TEST9-T: VFTable for 'Test9::Y' in 'Test9::Z' in 'Test9::T' (1 entry).
// TEST9-T-NEXT: 0 | void Test9::T::h()
// TEST9-T: VFTable for 'A' in 'Test9::X' in 'Test9::Y' in 'Test9::Z' in 'Test9::T' (2 entries).
// TEST9-T-NEXT: 0 | void Test9::T::f()
// TEST9-T-NEXT: 1 | void Test9::T::z()
// TEST9-T: VFTable for 'B' in 'Test9::Z' in 'Test9::T' (1 entry).
// TEST9-T-NEXT: 0 | void Test9::T::g()
// TEST9-T: VFTable for 'D' in 'Test9::T' (1 entry).
// TEST9-T-NEXT: 0 | void Test9::T::h()
// TEST9-T-NEXT: [this adjustment: -8 non-virtual]
// TEST9-T: Thunks for 'void Test9::T::h()' (1 entry).
// TEST9-T-NEXT: 0 | [this adjustment: -8 non-virtual]
// TEST9-T: VFTable for 'A' in 'D' in 'Test9::T' (2 entries).
// TEST9-T-NEXT: 0 | void Test9::T::f()
// TEST9-T-NEXT: [this adjustment: -8 non-virtual]
// TEST9-T-NEXT: 1 | void Test9::T::z()
// TEST9-T-NEXT: [this adjustment: -8 non-virtual]
// TEST9-T: Thunks for 'void Test9::T::f()' (1 entry).
// TEST9-T-NEXT: 0 | [this adjustment: -8 non-virtual]
// TEST9-T: Thunks for 'void Test9::T::z()' (1 entry).
// TEST9-T-NEXT: 0 | [this adjustment: -8 non-virtual]
// TEST9-T: VFTable indices for 'Test9::T' (4 entries).
// TEST9-T-NEXT: via vfptr at offset 0
// TEST9-T-NEXT: 0 | void Test9::T::h()
// TEST9-T-NEXT: via vbtable index 1, vfptr at offset 0
// TEST9-T-NEXT: 0 | void Test9::T::f()
// TEST9-T-NEXT: 1 | void Test9::T::z()
// TEST9-T-NEXT: via vbtable index 2, vfptr at offset 0
// TEST9-T-NEXT: 0 | void Test9::T::g()
// MANGLING-DAG: @"\01??_7T@Test9@@6BA@@@"
// MANGLING-DAG: @"\01??_7T@Test9@@6BD@@@"
// MANGLING-DAG: @"\01??_7T@Test9@@6BX@1@@"
// MANGLING-DAG: @"\01??_7T@Test9@@6B@"
// MANGLING-DAG: @"\01??_7T@Test9@@6BY@1@@"
virtual void f();
virtual void g();
virtual void h();
virtual void z();
};
T t;
}
namespace Test10 {
struct X : virtual C, virtual A {
// TEST10: VFTable for 'A' in 'C' in 'Test10::X' (2 entries).
// TEST10-NEXT: 0 | void Test10::X::f()
// TEST10-NEXT: 1 | void A::z()
// TEST10: VFTable indices for 'Test10::X' (1 entry).
// TEST10-NEXT: via vbtable index 1, vfptr at offset 0
// TEST10-NEXT: 0 | void Test10::X::f()
virtual void f();
};
void X::f() {}
X x;
}
namespace Test11 {
struct X : virtual A {};
struct Y { virtual void g(); };
struct Z : virtual X, Y {
// MANGLING-DAG: @"\01??_7Z@Test11@@6BY@1@@"
// MANGLING-DAG: @"\01??_7Z@Test11@@6BX@1@@"
};
Z z;
struct W : virtual X, A {};
// PR17748 FIXME this one hits UNREACHABLE:
// W w;
}
namespace vdtors {
struct X {
virtual ~X();
virtual void zzz();
};
struct Y : virtual X {
// VDTORS-Y: VFTable for 'vdtors::X' in 'vdtors::Y' (2 entries).
// VDTORS-Y-NEXT: 0 | vdtors::Y::~Y() [scalar deleting]
// VDTORS-Y-NEXT: 1 | void vdtors::X::zzz()
// VDTORS-Y-NOT: Thunks for 'vdtors::Y::~Y()'
virtual ~Y();
};
Y y;
struct Z {
virtual void z();
};
struct W : Z, X {
// Implicit virtual dtor.
};
struct U : virtual W {
// VDTORS-U: VFTable for 'vdtors::Z' in 'vdtors::W' in 'vdtors::U' (1 entry).
// VDTORS-U-NEXT: 0 | void vdtors::Z::z()
// VDTORS-U: VFTable for 'vdtors::X' in 'vdtors::W' in 'vdtors::U' (2 entries).
// VDTORS-U-NEXT: 0 | vdtors::U::~U() [scalar deleting]
// VDTORS-U-NEXT: [this adjustment: -4 non-virtual]
// VDTORS-U-NEXT: 1 | void vdtors::X::zzz()
// VDTORS-U: Thunks for 'vdtors::W::~W()' (1 entry).
// VDTORS-U-NEXT: 0 | [this adjustment: -4 non-virtual]
// VDTORS-U: VFTable indices for 'vdtors::U' (1 entry).
// VDTORS-U-NEXT: -- accessible via vbtable index 1, vfptr at offset 4 --
// VDTORS-U-NEXT: 0 | vdtors::U::~U() [scalar deleting]
virtual ~U();
};
U u;
struct V : virtual W {
// VDTORS-V: VFTable for 'vdtors::Z' in 'vdtors::W' in 'vdtors::V' (1 entry).
// VDTORS-V-NEXT: 0 | void vdtors::Z::z()
// VDTORS-V: VFTable for 'vdtors::X' in 'vdtors::W' in 'vdtors::V' (2 entries).
// VDTORS-V-NEXT: 0 | vdtors::V::~V() [scalar deleting]
// VDTORS-V-NEXT: [this adjustment: -4 non-virtual]
// VDTORS-V-NEXT: 1 | void vdtors::X::zzz()
// VDTORS-V: Thunks for 'vdtors::W::~W()' (1 entry).
// VDTORS-V-NEXT: 0 | [this adjustment: -4 non-virtual]
// VDTORS-V: VFTable indices for 'vdtors::V' (1 entry).
// VDTORS-V-NEXT: -- accessible via vbtable index 1, vfptr at offset 4 --
// VDTORS-V-NEXT: 0 | vdtors::V::~V() [scalar deleting]
};
V v;
struct T : virtual X {
virtual ~T();
};
struct P : T, Y {
// VDTORS-P: VFTable for 'vdtors::X' in 'vdtors::T' in 'vdtors::P' (2 entries).
// VDTORS-P-NEXT: 0 | vdtors::P::~P() [scalar deleting]
// VDTORS-P-NEXT: 1 | void vdtors::X::zzz()
// VDTORS-P-NOT: Thunks for 'vdtors::P::~P()'
virtual ~P();
};
P p;
}
namespace return_adjustment {
struct X : virtual A {
virtual void f();
};
struct Y : virtual A, virtual X {
virtual void f();
};
struct Z {
virtual A* foo();
};
struct W : Z {
// RET-W: VFTable for 'return_adjustment::Z' in 'return_adjustment::W' (2 entries).
// RET-W-NEXT: 0 | return_adjustment::X *return_adjustment::W::foo()
// RET-W-NEXT: [return adjustment: vbase #1, 0 non-virtual]
// RET-W-NEXT: 1 | return_adjustment::X *return_adjustment::W::foo()
// RET-W: VFTable indices for 'return_adjustment::W' (1 entry).
// RET-W-NEXT: 1 | return_adjustment::X *return_adjustment::W::foo()
virtual X* foo();
};
W y;
struct T : W {
// RET-T: VFTable for 'return_adjustment::Z' in 'return_adjustment::W' in 'return_adjustment::T' (3 entries).
// RET-T-NEXT: 0 | return_adjustment::Y *return_adjustment::T::foo()
// RET-T-NEXT: [return adjustment: vbase #1, 0 non-virtual]
// RET-T-NEXT: 1 | return_adjustment::Y *return_adjustment::T::foo()
// RET-T-NEXT: [return adjustment: vbase #2, 0 non-virtual]
// RET-T-NEXT: 2 | return_adjustment::Y *return_adjustment::T::foo()
// RET-T: VFTable indices for 'return_adjustment::T' (1 entry).
// RET-T-NEXT: 2 | return_adjustment::Y *return_adjustment::T::foo()
virtual Y* foo();
};
T t;
struct U : virtual A {
virtual void g(); // adds a vfptr
};
struct V : Z {
// RET-V: VFTable for 'return_adjustment::Z' in 'return_adjustment::V' (2 entries).
// RET-V-NEXT: 0 | return_adjustment::U *return_adjustment::V::foo()
// RET-V-NEXT: [return adjustment: vbptr at offset 4, vbase #1, 0 non-virtual]
// RET-V-NEXT: 1 | return_adjustment::U *return_adjustment::V::foo()
// RET-V: VFTable indices for 'return_adjustment::V' (1 entry).
// RET-V-NEXT: 1 | return_adjustment::U *return_adjustment::V::foo()
virtual U* foo();
};
V v;
}
namespace pr17748 {
struct A {
virtual void f() {}
};
struct B : virtual A {
B() {}
};
struct C : virtual B, A {
C() {}
};
C c;
// MANGLING-DAG: @"\01??_7A@pr17748@@6B@"
// MANGLING-DAG: @"\01??_7B@pr17748@@6B@"
// MANGLING-DAG: @"\01??_7C@pr17748@@6BA@1@@"
// MANGLING-DAG: @"\01??_7C@pr17748@@6BB@1@@"
}