1  /* PR tree-optimization/84503 */
       2  /* { dg-do run } */
       3  /* { dg-options "-O3" } */
       4  
       5  typedef __SIZE_TYPE__ size_t;
       6  typedef __UINTPTR_TYPE__ uintptr_t;
       7  
       8  struct S { int a; unsigned short b; int c, d, e; long f, g, h; int i, j; };
       9  static struct S *k;
      10  static size_t l = 0;
      11  int m;
      12  
      13  static int
      14  bar (void)
      15  {
      16    unsigned i;
      17    int j;
      18    if (k[0].c == 0)
      19      {
      20        ++m;
      21        size_t n = l * 2;
      22        struct S *o;
      23        o = (struct S *) __builtin_realloc (k, sizeof (struct S) * n);
      24        if (!o)
      25  	__builtin_exit (0);
      26        k = o;
      27        for (i = l; i < n; i++)
      28  	{
      29  	  void *p = (void *) &k[i];
      30  	  int q = 0;
      31  	  size_t r = sizeof (struct S);
      32  	  if ((((uintptr_t) p) % __alignof__ (long)) == 0
      33  	      && r % sizeof (long) == 0)
      34  	    {
      35  	      long __attribute__ ((may_alias)) *s = (long *) p;
      36  	      long *t = (long *) ((char *) s + r);
      37  	      while (s < t)
      38  		*s++ = 0;
      39  	    }
      40  	  else
      41  	    __builtin_memset (p, q, r);
      42  	  k[i].c = i + 1;
      43  	  k[i].a = -1;
      44  	}
      45        k[n - 1].c = 0;
      46        k[0].c = l;
      47        l = n;
      48      }
      49    j = k[0].c;
      50    k[0].c = k[j].c;
      51    return j;
      52  }
      53  
      54  int
      55  main ()
      56  {
      57    k = (struct S *) __builtin_malloc (sizeof (struct S));
      58    if (!k)
      59      __builtin_exit (0);
      60    __builtin_memset (k, '\0', sizeof (struct S));
      61    k->a = -1;
      62    l = 1;
      63    for (int i = 0; i < 15; ++i)
      64      bar ();
      65    if (m != 4)
      66      __builtin_abort ();
      67    return 0;
      68  }