skip-vtable-pointer-initialization.cpp revision 1493e2369cb426da9d916949f45e62a6e6ac5ab4 
1// RUN: %clang_cc1 %s -triple=x86_64-apple-darwin10 -emit-llvm -o - | FileCheck %s
2// XFAIL: *
3
4namespace Test1 {
5
6// Check that we don't initialize the vtable pointer in A::~A(), since the destructor body is trivial.
7struct A {
8  virtual void f();
9  ~A();
10};
11
12// CHECK: define void @_ZN5Test11AD2Ev
13// CHECK-NOT: store i8** getelementptr inbounds ([3 x i8*]* @_ZTVN5Test11AE, i64 0, i64 2), i8***
14A::~A()
15{
16}
17
18}
19
20namespace Test2 {
21
22// Check that we do initialize the vtable pointer in A::~A() since the destructor body isn't trivial.
23struct A {
24  virtual void f();
25  ~A();
26};
27
28// CHECK: define void @_ZN5Test21AD2Ev
29// CHECK: store i8** getelementptr inbounds ([3 x i8*]* @_ZTVN5Test21AE, i64 0, i64 2), i8***
30A::~A() {
31  f();
32}
33
34}
35
36namespace Test3 {
37
38// Check that we don't initialize the vtable pointer in A::~A(), since the destructor body is trivial
39// and Field's destructor body is also trivial.
40struct Field {
41  ~Field() { }
42};
43
44struct A {
45  virtual void f();
46  ~A();
47
48  Field field;
49};
50
51// CHECK: define void @_ZN5Test31AD2Ev
52// CHECK-NOT: store i8** getelementptr inbounds ([3 x i8*]* @_ZTVN5Test31AE, i64 0, i64 2), i8***
53A::~A() {
54
55}
56
57}
58
59namespace Test4 {
60
61// Check that we do initialize the vtable pointer in A::~A(), since Field's destructor body
62// isn't trivial.
63
64void f();
65
66struct Field {
67  ~Field() { f(); }
68};
69
70struct A {
71  virtual void f();
72  ~A();
73
74  Field field;
75};
76
77// CHECK: define void @_ZN5Test41AD2Ev
78// CHECK: store i8** getelementptr inbounds ([3 x i8*]* @_ZTVN5Test41AE, i64 0, i64 2), i8***
79A::~A()
80{
81}
82
83}
84
85namespace Test5 {
86
87// Check that we do initialize the vtable pointer in A::~A(), since Field's destructor isn't
88// available in this translation unit.
89
90struct Field {
91  ~Field();
92};
93
94struct A {
95  virtual void f();
96  ~A();
97
98  Field field;
99};
100
101// CHECK: define void @_ZN5Test51AD2Ev
102// CHECK: store i8** getelementptr inbounds ([3 x i8*]* @_ZTVN5Test51AE, i64 0, i64 2), i8***
103A::~A()
104{
105}
106
107}