gcc/testsuite/gcc.c-torture/execute/20050826-1.c

   1 /* PR rtl-optimization/23561 */
   2
   3 struct A
   4 {
   5   char a1[1];
   6   char a2[5];
   7   char a3[1];
   8   char a4[2048 - 7];
   9 } a;
  10
  11 typedef __SIZE_TYPE__ size_t;
  12 extern void *memset (void *, int, size_t);
  13 extern void *memcpy (void *, const void *, size_t);
  14 extern int memcmp (const void *, const void *, size_t);
  15 extern void abort (void);
  16
  17 void
  18 bar (struct A *x)
  19 {
  20   size_t i;
  21   if (memcmp (x, "\1HELLO\1", sizeof "\1HELLO\1"))
  22     abort ();
  23   for (i = 0; i < sizeof (x->a4); i++)
  24     if (x->a4[i])
  25       abort ();
  26 }
  27
  28 int
  29 foo (void)
  30 {
  31   memset (&a, 0, sizeof (a));
  32   a.a1[0] = 1;
  33   memcpy (a.a2, "HELLO", sizeof "HELLO");
  34   a.a3[0] = 1;
  35   bar (&a);
  36   return 0;
  37 }
  38
  39 int
  40 main (void)
  41 {
  42   foo ();
  43   return 0;
  44 }