Mercurial > hg > CbC > CbC_gcc
comparison gcc/testsuite/gcc.dg/bf-no-ms-layout.c @ 111:04ced10e8804
gcc 7
author | kono |
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date | Fri, 27 Oct 2017 22:46:09 +0900 |
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68:561a7518be6b | 111:04ced10e8804 |
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1 /* bf-no-ms-layout.c */ | |
2 | |
3 /* Test for gcc bitfield layout, with -mno-ms-bitfields */ | |
4 /* Adapted from Donn Terry <donnte@microsoft.com> testcase | |
5 posted to GCC-patches | |
6 http://gcc.gnu.org/ml/gcc-patches/2000-08/msg00577.html */ | |
7 | |
8 /* { dg-do run { target *-*-mingw* *-*-cygwin* i?86-*-darwin } } */ | |
9 /* { dg-options "-mno-ms-bitfields" } */ | |
10 | |
11 #include <stddef.h> | |
12 #include <string.h> | |
13 | |
14 extern void abort(); | |
15 | |
16 #pragma pack(8) | |
17 | |
18 struct one { | |
19 int d; | |
20 unsigned char a; | |
21 unsigned short b:7; | |
22 char c; | |
23 }; | |
24 | |
25 struct two { | |
26 int d; | |
27 unsigned char a; | |
28 unsigned int b:7; | |
29 char c; | |
30 }; | |
31 | |
32 struct three { | |
33 short d; | |
34 unsigned short a:3; | |
35 unsigned short b:9; | |
36 unsigned char c:7; | |
37 }; | |
38 | |
39 | |
40 /* Bitfields of size 0 have some truly odd behaviors. */ | |
41 | |
42 struct four { | |
43 unsigned short a:3; | |
44 unsigned short b:9; | |
45 unsigned int :0; /* forces struct alignment to int */ | |
46 unsigned char c:7; | |
47 }; | |
48 | |
49 struct five { | |
50 char a; | |
51 int :0; /* ignored; prior field is not a bitfield. */ | |
52 char b; | |
53 char c; | |
54 }; | |
55 | |
56 struct six { | |
57 char a :8; | |
58 int :0; /* not ignored; prior field IS a bitfield, causes | |
59 struct alignment as well. */ | |
60 char b; | |
61 char c; | |
62 } ; | |
63 | |
64 struct seven { | |
65 char a:8; | |
66 char :0; | |
67 int :0; /* Ignored; prior field is zero size bitfield. */ | |
68 char b; | |
69 char c; | |
70 }; | |
71 | |
72 struct eight { /* ms size 4 */ | |
73 short b:3; | |
74 char c; | |
75 }; | |
76 | |
77 #ifdef _MSC_VER | |
78 #define LONGLONG __int64 | |
79 #else | |
80 #define LONGLONG long long | |
81 #endif | |
82 | |
83 union nine { /* ms size 8 */ | |
84 LONGLONG a:3; | |
85 char c; | |
86 }; | |
87 | |
88 struct ten { /* ms size 16 */ | |
89 LONGLONG a:3; | |
90 LONGLONG b:3; | |
91 char c; | |
92 }; | |
93 | |
94 | |
95 #define val(s,f) (s.f) | |
96 | |
97 #define check_struct(_X) \ | |
98 { \ | |
99 if (sizeof (struct _X) != exp_sizeof_##_X ) \ | |
100 abort(); \ | |
101 memcpy(&test_##_X, filler, sizeof(test_##_X));\ | |
102 if (val(test_##_X,c) != exp_##_X##_c) \ | |
103 abort(); \ | |
104 } | |
105 | |
106 #define check_union(_X) \ | |
107 { \ | |
108 if (sizeof (union _X) != exp_sizeof_##_X ) \ | |
109 abort(); \ | |
110 memcpy(&test_##_X, filler, sizeof(test_##_X));\ | |
111 if (val(test_##_X,c) != exp_##_X##_c) \ | |
112 abort(); \ | |
113 } | |
114 | |
115 #define check_struct_size(_X) \ | |
116 { \ | |
117 if (sizeof (struct _X) != exp_sizeof_##_X ) \ | |
118 abort(); \ | |
119 } | |
120 | |
121 #define check_struct_off(_X) \ | |
122 { \ | |
123 memcpy(&test_##_X, filler, sizeof(test_##_X));\ | |
124 if (val(test_##_X,c) != exp_##_X##_c) \ | |
125 abort(); \ | |
126 } | |
127 | |
128 #define check_union_size(_X) \ | |
129 { \ | |
130 if (sizeof (union _X) != exp_sizeof_##_X ) \ | |
131 abort(); \ | |
132 } | |
133 | |
134 #define check_union_off(_X) \ | |
135 { \ | |
136 memcpy(&test_##_X, filler, sizeof(test_##_X));\ | |
137 if (val(test_##_X,c) != exp_##_X##_c) \ | |
138 abort(); \ | |
139 } | |
140 | |
141 int main(){ | |
142 | |
143 unsigned char filler[16]; | |
144 struct one test_one; | |
145 struct two test_two; | |
146 struct three test_three; | |
147 struct four test_four; | |
148 struct five test_five; | |
149 struct six test_six; | |
150 struct seven test_seven; | |
151 struct eight test_eight; | |
152 union nine test_nine; | |
153 struct ten test_ten; | |
154 | |
155 #if defined (_TEST_MS_LAYOUT) || defined (_MSC_VER) | |
156 size_t exp_sizeof_one = 12; | |
157 size_t exp_sizeof_two = 16; | |
158 size_t exp_sizeof_three =6; | |
159 size_t exp_sizeof_four = 8; | |
160 size_t exp_sizeof_five = 3; | |
161 size_t exp_sizeof_six = 8; | |
162 size_t exp_sizeof_seven = 3; | |
163 size_t exp_sizeof_eight = 4; | |
164 size_t exp_sizeof_nine = 8; | |
165 size_t exp_sizeof_ten = 16; | |
166 | |
167 unsigned char exp_one_c = 8; | |
168 unsigned char exp_two_c = 12; | |
169 unsigned char exp_three_c = 4; | |
170 unsigned char exp_four_c = 4; | |
171 char exp_five_c = 2; | |
172 char exp_six_c = 5; | |
173 char exp_seven_c = 2; | |
174 char exp_eight_c = 2; | |
175 char exp_nine_c = 0; | |
176 char exp_ten_c = 8; | |
177 | |
178 #else /* testing -mno-ms-bitfields */ | |
179 | |
180 size_t exp_sizeof_one = 8; | |
181 size_t exp_sizeof_two = 8; | |
182 size_t exp_sizeof_three = 6; | |
183 size_t exp_sizeof_four = 6; | |
184 size_t exp_sizeof_five = 6; | |
185 size_t exp_sizeof_six = 6; | |
186 size_t exp_sizeof_seven = 6; | |
187 size_t exp_sizeof_eight = 2; | |
188 size_t exp_sizeof_nine = 8; | |
189 size_t exp_sizeof_ten = 8; | |
190 | |
191 unsigned short exp_one_c = 6; | |
192 unsigned int exp_two_c = 6; | |
193 unsigned char exp_three_c = 64; | |
194 unsigned char exp_four_c = 4; | |
195 char exp_five_c = 5; | |
196 char exp_six_c = 5; | |
197 char exp_seven_c = 5; | |
198 char exp_eight_c = 1; | |
199 char exp_nine_c = 0; | |
200 char exp_ten_c = 1; | |
201 | |
202 #endif | |
203 | |
204 unsigned char i; | |
205 for ( i = 0; i < 16; i++ ) | |
206 filler[i] = i; | |
207 | |
208 check_struct_off (one); | |
209 check_struct_off (two); | |
210 check_struct_off (three); | |
211 check_struct_off (four); | |
212 check_struct_off (five); | |
213 check_struct_off (six); | |
214 check_struct_off (seven); | |
215 check_struct_off (eight); | |
216 check_union_off (nine); | |
217 check_struct_off (ten); | |
218 | |
219 check_struct_size (one); | |
220 check_struct_size (two); | |
221 check_struct_size (three); | |
222 check_struct_size (four); | |
223 check_struct_size (five); | |
224 check_struct_size (six); | |
225 check_struct_size (seven); | |
226 check_struct_size (eight); | |
227 check_union_size (nine); | |
228 check_struct_size (ten); | |
229 | |
230 return 0; | |
231 }; |