1extern void *malloc(__SIZE_TYPE__);
2extern void *memset(void *, int, __SIZE_TYPE__);
3typedef struct
4{
5  short a;
6  unsigned short b;
7  unsigned short c;
8  unsigned long long Count;
9  long long Count2;
10} __attribute__((packed)) Struct1;
11
12typedef struct
13{
14  short a;
15  unsigned short b;
16  unsigned short c;
17  unsigned long long d;
18  long long e;
19  long long f;
20} __attribute__((packed)) Struct2;
21
22typedef union
23{
24  Struct1 a;
25  Struct2 b;
26} Union;
27
28typedef struct
29{
30  int Count;
31  Union List[0];
32} __attribute__((packed)) Struct3;
33
34unsigned long long Sum (Struct3 *instrs) __attribute__((noinline));
35unsigned long long Sum (Struct3 *instrs)
36{
37    unsigned long long  count = 0;
38    int     i;
39
40    for (i = 0; i < instrs->Count; i++) {
41        count += instrs->List[i].a.Count;
42    }
43    return count;
44}
45long long Sum2 (Struct3 *instrs) __attribute__((noinline));
46long long Sum2 (Struct3 *instrs)
47{
48    long long  count = 0;
49    int     i;
50
51    for (i = 0; i < instrs->Count; i++) {
52        count += instrs->List[i].a.Count2;
53    }
54    return count;
55}
56main() {
57  Struct3 *p = malloc (sizeof (int) + 3 * sizeof(Union));
58  memset(p, 0, sizeof(int) + 3*sizeof(Union));
59  p->Count = 3;
60  p->List[0].a.Count = 555;
61  p->List[1].a.Count = 999;
62  p->List[2].a.Count = 0x101010101ULL;
63  p->List[0].a.Count2 = 555;
64  p->List[1].a.Count2 = 999;
65  p->List[2].a.Count2 = 0x101010101LL;
66  if (Sum(p) != 555 + 999 + 0x101010101ULL)
67    abort();
68  if (Sum2(p) != 555 + 999 + 0x101010101LL)
69    abort();
70  return 0;
71}
72