gcc/testsuite/gcc.c-torture/execute/pr34176.c

typedef __SIZE_TYPE__ size_t;
typedef unsigned int index_ty;
typedef index_ty *index_list_ty;

struct mult_index
{
  index_ty index;
  unsigned int count;
};

struct mult_index_list
{
  struct mult_index *item;
  size_t nitems;
  size_t nitems_max;

  struct mult_index *item2;
  size_t nitems2_max;
};

int __attribute__((noinline))
hash_find_entry (size_t *result)
{
    *result = 2;
    return 0;
}

extern void abort (void);
struct mult_index * __attribute__((noinline))
foo (size_t n)
{
  static count = 0;
  if (count++ > 0)
    abort ();
  return 0;
}

int
main (void)
{
    size_t nitems = 0;

    for (;;)
    {
        size_t list;

        hash_find_entry (&list);
        {
            size_t len2 = list;
            struct mult_index *destptr;
            struct mult_index *dest;
            size_t new_max  = nitems + len2;

            if (new_max != len2)
                break;
            dest = foo (new_max);

            destptr = dest;
            while (len2--)
                destptr++;

            nitems = destptr - dest;
        }
    }

    return 0;
}