aboutsummaryrefslogtreecommitdiffstats
path: root/gcc-4.9/gcc/testsuite/gcc.dg/bf-ms-layout.c
blob: 109a01b0a07ea309100eed32e98478c2facba042 (plain)
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
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
/* bf-ms-layout.c */

/* Test for MS bitfield layout */
/* Adapted from Donn Terry <donnte@microsoft.com> testcase
   posted to GCC-patches
   http://gcc.gnu.org/ml/gcc-patches/2000-08/msg00577.html */

/* { dg-do run { target *-*-interix* *-*-mingw* *-*-cygwin* i?86-*-darwin* } } */
/* { dg-options "-mms-bitfields -D_TEST_MS_LAYOUT" } */

#include <stddef.h>
#include <string.h>

extern void abort();

#pragma pack(8)

struct one {
  int d;
  unsigned char a;
  unsigned short b:7;
  char c;
} ;

struct two {
  int d;
  unsigned char a;
  unsigned int b:7;
  char c;
} ;

struct three {
  short d;
  unsigned short a:3;
  unsigned short b:9;
  unsigned char c:7;
} ;


/* Bitfields of size 0 have some truly odd behaviors. */

struct four {
  unsigned short a:3;
  unsigned short b:9;
  unsigned int :0;  /* forces struct alignment to int */
  unsigned char c:7;
} ;

struct five {
  char a;
  int :0;        /* ignored; prior field is not a bitfield. */
  char b;
  char c;
} ;

struct six {
  char a :8;
  int :0;	/* not ignored; prior field IS a bitfield, causes
		   struct alignment as well. */
  char b;
  char c;
} ;

struct seven {
  char a:8;
  char :0;
  int  :0;	/* Ignored; prior field is zero size bitfield. */
  char b;
  char c;
} ;

struct eight { /* ms size 4 */
  short b:3;
  char  c;
} ;

#ifdef _MSC_VER
#define LONGLONG __int64
#else
#define LONGLONG long long
#endif

union nine {   /* ms size 8 */
  LONGLONG a:3;
  char  c;
} ;

struct ten {   /* ms size 16 */
  LONGLONG a:3;
  LONGLONG b:3;
  char  c;
} ;


#define val(s,f) (s.f)

#define check_struct(_X) \
{ \
  if (sizeof (struct _X) != exp_sizeof_##_X )	\
    abort();					\
  memcpy(&test_##_X, filler, sizeof(test_##_X));\
  if (val(test_##_X,c) != exp_##_X##_c) 	\
     abort();					\
}

#define check_union(_X) \
{ \
  if (sizeof (union _X) != exp_sizeof_##_X )	\
    abort();                                    \
  memcpy(&test_##_X, filler, sizeof(test_##_X));\
  if (val(test_##_X,c) != exp_##_X##_c) 	\
     abort();					\
}

#define check_struct_size(_X) \
{ \
  if (sizeof (struct _X) != exp_sizeof_##_X )	\
    abort();                                    \
}

#define check_struct_off(_X) \
{ \
  memcpy(&test_##_X, filler, sizeof(test_##_X));\
  if (val(test_##_X,c) != exp_##_X##_c) 	\
    abort();                                    \
}

#define check_union_size(_X) \
{ \
  if (sizeof (union _X) != exp_sizeof_##_X )	\
    abort();                                    \
}

#define check_union_off(_X) \
{ \
  memcpy(&test_##_X, filler, sizeof(test_##_X));\
  if (val(test_##_X,c) != exp_##_X##_c) 	\
    abort();                                    \
}

int main(){

  unsigned char filler[16];
  struct one test_one;
  struct two test_two;
  struct three test_three;
  struct four test_four;
  struct five test_five;
  struct six test_six;
  struct seven test_seven;
  struct eight test_eight;
  union nine test_nine;
  struct ten test_ten;

#if defined (_TEST_MS_LAYOUT) || defined (_MSC_VER)
  size_t exp_sizeof_one = 8;
  size_t exp_sizeof_two = 12;
  size_t exp_sizeof_three =6;
  size_t exp_sizeof_four = 8;
  size_t exp_sizeof_five = 3;
  size_t exp_sizeof_six = 8;
  size_t exp_sizeof_seven = 3;
  size_t exp_sizeof_eight = 2;
  size_t exp_sizeof_nine = 8;
  size_t exp_sizeof_ten = 8;

  unsigned char exp_one_c = 7;
  unsigned char exp_two_c  = 9;
  unsigned char exp_three_c = 4;
  unsigned char exp_four_c = 4;
  char exp_five_c = 2;
  char exp_six_c = 5;
  char exp_seven_c = 2;
  char exp_eight_c = 1;
  char exp_nine_c = 0;
  char exp_ten_c = 1;

#else /* testing -mno-ms-bitfields */

  size_t exp_sizeof_one = 8;
  size_t exp_sizeof_two = 8;
  size_t exp_sizeof_three = 6;
  size_t exp_sizeof_four = 6;
  size_t exp_sizeof_five = 6;
  size_t exp_sizeof_six = 6;
  size_t exp_sizeof_seven = 6;
  size_t exp_sizeof_eight = 2;
  size_t exp_sizeof_nine = 8;
  size_t exp_sizeof_ten = 8;

  unsigned short exp_one_c = 6;
  unsigned int exp_two_c  = 6;
  unsigned char exp_three_c = 64;
  unsigned char exp_four_c = 4;
  char exp_five_c = 5;
  char exp_six_c = 5;
  char exp_seven_c = 5;
  char exp_eight_c = 1;
  char exp_nine_c = 0;
  char exp_ten_c = 1;

#endif

  unsigned char i;
  for ( i = 0; i < 16; i++ )
    filler[i] = i;

  check_struct_off (one);
  check_struct_off (two);
  check_struct_off (three);
  check_struct_off (four);
  check_struct_off (five);
  check_struct_off (six);
  check_struct_off (seven);
  check_struct_off (eight);
  check_union_off (nine);
  check_struct_off (ten);

  check_struct_size (one);
  check_struct_size (two);
  check_struct_size (three);
  check_struct_size (four);
  check_struct_size (five);
  check_struct_size (six);
  check_struct_size (seven);
  check_struct_size (eight);
  check_union_size (nine);
  check_struct_size (ten);

  return 0;
};