gnu/dist/gcc4/gcc/testsuite/gcc.c-torture/execute/991014-1.c

   1
   2 typedef typeof(sizeof(char)) Size_t;
   3
   4 #define bufsize ((1L << (8 * sizeof(Size_t) - 2))-256)
   5
   6 struct huge_struct
   7 {
   8   short buf[bufsize];
   9   int a;
  10   int b;
  11   int c;
  12   int d;
  13 };
  14
  15 union huge_union
  16 {
  17   int a;
  18   char buf[bufsize];
  19 };
  20
  21 unsigned long union_size()
  22 {
  23   return sizeof(union huge_union);
  24 }
  25
  26 unsigned long struct_size()
  27 {
  28   return sizeof(struct huge_struct);
  29 }
  30
  31 unsigned long struct_a_offset()
  32 {
  33   return (unsigned long)(&((struct huge_struct *) 0)->a);
  34 }
  35
  36 int main()
  37 {
  38   /* Check the exact sizeof value. bufsize is aligned on 256b. */
  39   if (union_size() != sizeof(char) * bufsize)
  40     abort();
  41
  42   if (struct_size() != sizeof(short) * bufsize + 4*sizeof(int))
  43     abort();
  44
  45   if (struct_a_offset() < sizeof(short) * bufsize)
  46     abort();
  47
  48   return 0;
  49 }
  50