1  /* PR rtl-optimization/44838 */
       2  /* { dg-do run } */
       3  /* { dg-options "-O2 -funroll-loops" } */
       4  
       5  extern void abort ();
       6  
       7  void
       8  foo (int *a, int n)
       9  {
      10    int *lasta = a + n;
      11    for (; a != lasta; a++)
      12      {
      13        *a *= 2;
      14        a[1] = a[-1] + a[-2];
      15      }
      16  }
      17  
      18  int a[16];
      19  int ref[16] = { 0, 1, 4, 2, 10, 12, 24, 44,
      20                  72, 136, 232, 416, 736, 1296, 2304, 2032 };
      21  
      22  int
      23  main ()
      24  {
      25    int i;
      26    for (i = 0; i < 16; i++)
      27      a[i] = i;
      28    foo (a + 2, 16 - 3);
      29    for (i = 0; i < 16; i++)
      30      if (ref[i] != a[i])
      31        abort ();
      32    return 0;
      33  }