1  /* { dg-do compile } */
       2  /* { dg-options "-O2 -fschedule-insns -funroll-all-loops -fcompare-debug" } */
       3  
       4  typedef void block128_f (int *, int);
       5  
       6  void
       7  foo (int *out, int *iv, block128_f block)
       8  {
       9    while (1)
      10      {
      11        *out = *out ^ *iv;
      12        block (out, *out);
      13        iv = out;
      14      }
      15  }