gcc/testsuite/gcc.c-torture/execute/20051113-1.c

   1 extern void *malloc(__SIZE_TYPE__);
   2 extern void *memset(void *, int, __SIZE_TYPE__);
   3 typedef 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
  12 typedef 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
  22 typedef union
  23 {
  24   Struct1 a;
  25   Struct2 b;
  26 } Union;
  27
  28 typedef struct
  29 {
  30   int Count;
  31   Union List[0];
  32 } __attribute__((packed)) Struct3;
  33
  34 unsigned long long Sum (Struct3 *instrs) __attribute__((noinline));
  35 unsigned 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 }
  45 long long Sum2 (Struct3 *instrs) __attribute__((noinline));
  46 long 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 }
  56 main() {
  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 }