12   struct __attribute__((packed)) S {  struct
13     unsigned b00 : 14;
14     unsigned b01 : 2;
15     unsigned b20 : 6;
16     unsigned b21 : 2;
17     unsigned b30 : 30;
18     unsigned b31 : 2;
19     unsigned b70 : 6;
20     unsigned b71 : 2;
163   struct S {  struct
164     char a;
165     unsigned b : 1;
166     char c;
208   struct S {  struct
209     unsigned b : 24;
210     void *p;
248   struct S {  struct
249     unsigned b : 24;
384   struct S {  struct
385     unsigned b1 : 24;
386     unsigned char : 0;
387     unsigned char b2 : 8;