gcc/testsuite/gcc.c-torture/execute/pr41395-1.c

   1 struct VEC_char_base
   2 {
   3   unsigned num;
   4   unsigned alloc;
   5   short vec[1];
   6 };
   7
   8 short __attribute__((noinline))
   9 foo (struct VEC_char_base *p, int i)
  10 {
  11   short *q;
  12   p->vec[i] = 0;
  13   q = &p->vec[8];
  14   *q = 1;
  15   return p->vec[i];
  16 }
  17
  18 extern void abort (void);
  19 extern void *malloc (__SIZE_TYPE__);
  20
  21 int
  22 main()
  23 {
  24   struct VEC_char_base *p = malloc (sizeof (struct VEC_char_base) + 256);
  25   if (foo (p, 8) != 1)
  26     abort ();
  27   return 0;
  28 }