value-init.cpp revision d1d56df188e25c633f9bc65d229897b42442b0f7 
1// RUN: %clang_cc1 %s -triple x86_64-apple-darwin10 -emit-llvm -o - | FileCheck %s
2
3struct A {
4  virtual ~A();
5};
6
7struct B : A { };
8
9struct C {
10  int i;
11  B b;
12};
13
14// CHECK: _Z15test_value_initv
15void test_value_init() {
16  // This value initialization requires zero initialization of the 'B'
17  // subobject followed by a call to its constructor.
18  // PR5800
19
20  // CHECK: store i32 17
21  // CHECK: call void @llvm.memset.p0i8.i64
22  // CHECK: call void @_ZN1BC1Ev
23  C c = { 17 } ;
24  // CHECK: call void @_ZN1CD1Ev
25}
26
27enum enum_type { negative_number = -1, magic_number = 42 };
28
29class enum_holder
30{
31  enum_type m_enum;
32
33public:
34  enum_holder() : m_enum(magic_number) { }
35};
36
37struct enum_holder_and_int
38{
39  enum_holder e;
40  int i;
41};
42
43// CHECK: _Z24test_enum_holder_and_intv()
44void test_enum_holder_and_int() {
45  // CHECK: alloca
46  // CHECK-NEXT: bitcast
47  // CHECK-NEXT: call void @llvm.memset
48  // CHECK-NEXT: call void @_ZN19enum_holder_and_intC1Ev
49  enum_holder_and_int();
50  // CHECK-NEXT: ret void
51}
52
53// PR7834: don't crash.
54namespace test1 {
55  struct A {
56    int A::*f;
57    A();
58    A(const A&);
59    A &operator=(const A &);
60  };
61
62  struct B {
63    A base;
64  };
65
66  void foo() {
67    B();
68  }
69}
70
71namespace ptrmem {
72  struct S {
73    int mem1;
74    int S::*mem2;
75  };
76
77  // CHECK: define i32 @_ZN6ptrmem4testEPNS_1SE
78  int test(S *s) {
79    // CHECK: call void @llvm.memcpy.p0i8.p0i8.i64
80    // CHECK: getelementptr
81    // CHECK: ret
82    return s->*S().mem2;
83  }
84}
85
86namespace zeroinit {
87  struct S { int i; };
88
89  // CHECK: define i32 @_ZN8zeroinit4testEv()
90  int test() {
91    // CHECK: call void @llvm.memset.p0i8.i64
92    // CHECK: getelementptr
93    // CHECK: ret i32
94    return S().i;
95  }
96
97  struct X0 {
98    X0() { }
99    int x;
100  };
101
102  struct X1 : X0 {
103    int x1;
104    void f();
105  };
106
107  // CHECK: define void @_ZN8zeroinit9testX0_X1Ev
108  void testX0_X1() {
109    // CHECK: call void @llvm.memset.p0i8.i64
110    // CHECK-NEXT: call void @_ZN8zeroinit2X1C1Ev
111    // CHECK-NEXT: call void @_ZN8zeroinit2X11fEv
112    X1().f();
113  }
114
115  template<typename>
116  struct X2 : X0 {
117    int x2;
118    void f();
119  };
120
121  template<typename>
122  struct X3 : X2<int> {
123    X3() : X2<int>() { }
124  };
125
126
127  // CHECK: define void @_ZN8zeroinit9testX0_X3Ev
128  void testX0_X3() {
129    // CHECK-NOT: call void @llvm.memset
130    // CHECK: call void @_ZN8zeroinit2X3IiEC1Ev
131    // CHECK: call void @_ZN8zeroinit2X2IiE1fEv
132    // CHECK-NEXT: ret void
133    X3<int>().f();
134  }
135
136  // CHECK: define linkonce_odr void @_ZN8zeroinit2X3IiEC2Ev
137  // CHECK: call void @llvm.memset.p0i8.i64
138  // CHECK-NEXT: call void @_ZN8zeroinit2X2IiEC2Ev
139  // CHECK-NEXT: ret void
140}
141
142namespace PR8726 {
143class C;
144struct S {
145  const C &c1;
146  int i;
147  const C &c2;
148};
149void f(const C& c) {
150  S s = {c, 42, c};
151}
152
153}