vtable-layout.cpp revision 96058953c72355efb266abe8e333db4f5715dbd2 
1// RUN: %clang_cc1 %s -triple=x86_64-apple-darwin10 -emit-llvm-only -fdump-vtable-layouts 2>&1 | FileCheck %s
2namespace Test1 {
3
4// CHECK:      Vtable for 'Test1::A' (3 entries).
5// CHECK-NEXT:   0 | offset_to_top (0)
6// CHECK-NEXT:   1 | Test1::A RTTI
7// CHECK-NEXT:       -- (Test1::A, 0) vtable address --
8// CHECK-NEXT:   2 | void Test1::A::f()
9struct A {
10  virtual void f();
11};
12void A::f() { }
13
14}
15
16namespace Test2 {
17
18// This is a smoke test of the vtable dumper.
19// CHECK:      Vtable for 'Test2::A' (9 entries).
20// CHECK-NEXT:   0 | offset_to_top (0)
21// CHECK-NEXT:   1 | Test2::A RTTI
22// CHECK-NEXT:       -- (Test2::A, 0) vtable address --
23// CHECK-NEXT:   2 | void Test2::A::f()
24// CHECK-NEXT:   3 | void Test2::A::f() const
25// CHECK-NEXT:   4 | Test2::A *Test2::A::g(int)
26// CHECK-NEXT:   5 | Test2::A::~A() [complete]
27// CHECK-NEXT:   6 | Test2::A::~A() [deleting]
28// CHECK-NEXT:   7 | void Test2::A::h()
29// CHECK-NEXT:   8 | Test2::A &Test2::A::operator=(Test2::A const &)
30struct A {
31  virtual void f();
32  virtual void f() const;
33
34  virtual A* g(int a);
35  virtual ~A();
36  virtual void h();
37  virtual A& operator=(const A&);
38};
39void A::f() { }
40
41// Another simple vtable dumper test.
42
43// CHECK:     Vtable for 'Test2::B' (6 entries).
44// CHECK-NEXT:  0 | offset_to_top (0)
45// CHECK-NEXT:  1 | Test2::B RTTI
46// CHECK-NEXT:    -- (Test2::B, 0) vtable address --
47// CHECK-NEXT:  2 | void Test2::B::f()
48// CHECK-NEXT:  3 | void Test2::B::g() [pure]
49// CHECK-NEXT:  4 | Test2::B::~B() [complete] [pure]
50// CHECK-NEXT:  5 | Test2::B::~B() [deleting] [pure]
51struct B {
52  virtual void f();
53  virtual void g() = 0;
54  virtual ~B() = 0;
55};
56void B::f() { }
57
58}
59
60namespace Test3 {
61
62// If a function in a derived class overrides a function in a primary base,
63// then the function should not have an entry in the derived class (unless the return
64// value requires adjusting).
65
66// CHECK:      Vtable for 'Test3::A' (3 entries).
67// CHECK-NEXT:   0 | offset_to_top (0)
68// CHECK-NEXT:   1 | Test3::A RTTI
69// CHECK-NEXT:       -- (Test3::A, 0) vtable address --
70// CHECK-NEXT:   2 | void Test3::A::f()
71struct A {
72  virtual void f();
73};
74void A::f() { }
75
76// CHECK:     Vtable for 'Test3::B' (4 entries).
77// CHECK-NEXT:  0 | offset_to_top (0)
78// CHECK-NEXT:  1 | Test3::B RTTI
79// CHECK-NEXT:      -- (Test3::B, 0) vtable address --
80// CHECK-NEXT:  2 | void Test3::A::f()
81// CHECK-NEXT:  3 | void Test3::B::g()
82struct B : A {
83  virtual void f();
84  virtual void g();
85};
86void B::f() { }
87
88// CHECK:     Vtable for 'Test3::C' (5 entries).
89// CHECK-NEXT:  0 | offset_to_top (0)
90// CHECK-NEXT:  1 | Test3::C RTTI
91// CHECK-NEXT:     -- (Test3::C, 0) vtable address --
92// CHECK-NEXT:  2 | void Test3::A::f()
93// CHECK-NEXT:  3 | void Test3::C::g()
94// CHECK-NEXT:  4 | void Test3::C::h()
95struct C : A {
96  virtual void g();
97  virtual void h();
98};
99void C::g() { }
100
101// CHECK:     Vtable for 'Test3::D' (5 entries).
102// CHECK-NEXT:  0 | offset_to_top (0)
103// CHECK-NEXT:  1 | Test3::D RTTI
104// CHECK-NEXT:     -- (Test3::D, 0) vtable address --
105// CHECK-NEXT:  2 | void Test3::A::f()
106// CHECK-NEXT:  3 | void Test3::B::g()
107// CHECK-NEXT:  4 | void Test3::D::h()
108struct D : B {
109  virtual void f();
110  virtual void g();
111  virtual void h();
112};
113
114void D::f() { }
115}
116
117// For now, just verify this doesn't crash.
118namespace test0 {
119  struct Obj {};
120
121  struct Base {           virtual const Obj *foo() = 0; };
122  struct Derived : Base { virtual       Obj *foo() { return new Obj(); } };
123
124  void test(Derived *D) { D->foo(); }
125}
126