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

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