1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
|
// RUN: %clang_cc1 -fno-rtti -emit-llvm-only -triple i686-pc-win32 -fdump-record-layouts -fsyntax-only -cxx-abi microsoft %s 2>&1 \
// RUN: | FileCheck %s
// RUN: %clang_cc1 -fno-rtti -emit-llvm-only -triple x86_64-pc-win32 -fdump-record-layouts -fsyntax-only -cxx-abi microsoft %s 2>/dev/null \
// RUN: | FileCheck %s -check-prefix CHECK-X64
extern "C" int printf(const char *fmt, ...);
char buffer[419430400];
struct A {
char a;
A() {
printf("A = %d\n", (int)((char*)this - buffer));
printf("A.a = %d\n", (int)((char*)&a - buffer));
}
};
struct B {
__declspec(align(4)) long long a;
B() {
printf("B = %d\n", (int)((char*)this - buffer));
printf("B.a = %d\n", (int)((char*)&a - buffer));
}
};
#pragma pack(push, 2)
struct X {
B a;
char b;
int c;
X() {
printf("X = %d\n", (int)((char*)this - buffer));
printf("X.a = %d\n", (int)((char*)&a - buffer));
printf("X.b = %d\n", (int)((char*)&b - buffer));
printf("X.c = %d\n", (int)((char*)&c - buffer));
}
};
// CHECK: *** Dumping AST Record Layout
// CHECK: 0 | struct X
// CHECK: 0 | struct B a
// CHECK: 0 | long long a
// CHECK: 8 | char b
// CHECK: 10 | int c
// CHECK: | [sizeof=16, align=4
// CHECK: | nvsize=16, nvalign=4]
// CHECK-X64: *** Dumping AST Record Layout
// CHECK-X64: 0 | struct X
// CHECK-X64: 0 | struct B a
// CHECK-X64: 0 | long long a
// CHECK-X64: 8 | char b
// CHECK-X64: 10 | int c
// CHECK-X64: | [sizeof=16, align=4
// CHECK-X64: | nvsize=16, nvalign=4]
struct Y : A, B {
char a;
int b;
Y() {
printf("Y = %d\n", (int)((char*)this - buffer));
printf("Y.a = %d\n", (int)((char*)&a - buffer));
printf("Y.b = %d\n", (int)((char*)&b - buffer));
}
};
// CHECK: *** Dumping AST Record Layout
// CHECK: 0 | struct Y
// CHECK: 0 | struct A (base)
// CHECK: 0 | char a
// CHECK: 4 | struct B (base)
// CHECK: 4 | long long a
// CHECK: 12 | char a
// CHECK: 14 | int b
// CHECK: | [sizeof=20, align=4
// CHECK: | nvsize=20, nvalign=4]
// CHECK-X64: *** Dumping AST Record Layout
// CHECK-X64: 0 | struct Y
// CHECK-X64: 0 | struct A (base)
// CHECK-X64: 0 | char a
// CHECK-X64: 4 | struct B (base)
// CHECK-X64: 4 | long long a
// CHECK-X64: 12 | char a
// CHECK-X64: 14 | int b
// CHECK-X64: | [sizeof=20, align=4
// CHECK-X64: | nvsize=20, nvalign=4]
struct Z : virtual B {
char a;
int b;
Z() {
printf("Z = %d\n", (int)((char*)this - buffer));
printf("Z.a = %d\n", (int)((char*)&a - buffer));
printf("Z.b = %d\n", (int)((char*)&b - buffer));
}
};
// CHECK: *** Dumping AST Record Layout
// CHECK: 0 | struct Z
// CHECK: 0 | (Z vbtable pointer)
// CHECK: 4 | char a
// CHECK: 6 | int b
// CHECK: 12 | struct B (virtual base)
// CHECK: 12 | long long a
// CHECK: | [sizeof=20, align=4
// CHECK: | nvsize=10, nvalign=2]
// CHECK-X64: *** Dumping AST Record Layout
// CHECK-X64: 0 | struct Z
// CHECK-X64: 0 | (Z vbtable pointer)
// CHECK-X64: 8 | char a
// CHECK-X64: 10 | int b
// CHECK-X64: 16 | struct B (virtual base)
// CHECK-X64: 16 | long long a
// CHECK-X64: | [sizeof=24, align=4
// CHECK-X64: | nvsize=14, nvalign=2]
#pragma pack(pop)
struct A1 { long long a; };
#pragma pack(push, 1)
struct B1 : virtual A1 { char a; };
#pragma pack(pop)
struct C1 : B1 {};
// CHECK: *** Dumping AST Record Layout
// CHECK: 0 | struct C1
// CHECK: 0 | struct B1 (base)
// CHECK: 0 | (B1 vbtable pointer)
// CHECK: 4 | char a
// CHECK: 8 | struct A1 (virtual base)
// CHECK: 8 | long long a
// CHECK: | [sizeof=16, align=8
// CHECK: | nvsize=5, nvalign=1]
// CHECK-X64: *** Dumping AST Record Layout
// CHECK-X64: 0 | struct C1
// CHECK-X64: 0 | struct B1 (base)
// CHECK-X64: 0 | (B1 vbtable pointer)
// CHECK-X64: 8 | char a
// CHECK-X64: 16 | struct A1 (virtual base)
// CHECK-X64: 16 | long long a
// CHECK-X64: | [sizeof=24, align=8
// CHECK-X64: | nvsize=9, nvalign=1]
int a[
sizeof(X)+
sizeof(Y)+
sizeof(Z)+
sizeof(C1)];
|
