1 /* Test for MS bitfield layout */
2 /* { dg-do run { target *-*-mingw* *-*-cygwin* i?86-*-* x86_64-*-* } } */
3 
4 extern void abort();
5 
6 struct s1_t {
7     char a;
8     char b __attribute__ ((aligned (16)));
9 } __attribute__ ((ms_struct));
10 struct s1_t s1;
11 
12 struct s2_t {
13   char a;
14   char b;
15 } __attribute__ ((ms_struct));
16 struct s2_t s2;
17 
18 struct s3_t {
19   __extension__ char a : 6;
20   char b __attribute__ ((aligned (16)));
21 } __attribute__ ((ms_struct));
22 struct s3_t s3;
23 
24 struct s4_t {
25   __extension__ char a : 6;
26   char b __attribute__ ((aligned (2)));
27 } __attribute__ ((ms_struct));
28 struct s4_t s4;
29 
30 struct s5_t {
31   __extension__ char a : 6;
32   char b __attribute__ ((aligned (1)));
33 } __attribute__ ((ms_struct));
34 struct s5_t s5;
35 
36 __extension__
offs(const void * a,const void * b)37 static __PTRDIFF_TYPE__ offs (const void *a, const void *b)
38 {
39   return (__PTRDIFF_TYPE__) ((const char*)a  - (const char*)b);
40 }
41 
main()42 int main()
43 {
44   if (offs (&s1.b, &s1) != 16
45       || offs (&s2.b, &s2) != 1
46       || offs (&s3.b, &s3) != 16
47       || offs (&s4.b, &s4) != 2
48       || offs (&s5.b, &s5) != 1)
49     abort ();
50   return 0;
51 }
52 
53