1  /* PR tree-optimization/53550 */
       2  /* { dg-do compile } */
       3  /* { dg-options "-O2 -fprefetch-loop-arrays -w" } */
       4  
       5  int *
       6  foo (int *x)
       7  {
       8    int *a = x + 10, *b = x, *c = a;
       9    while (b != c)
      10      *--c = *b++;
      11    return x;
      12  }