1  /* { dg-do compile } */
       2  /* { dg-options "-O -fdump-tree-forwprop4" } */
       3  
       4  __UINT8_TYPE__
       5  f(__UINT16_TYPE__ b)
       6  {
       7    __UINT8_TYPE__ a;
       8  #if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
       9    __builtin_memcpy(&a, &b, sizeof a);
      10  #elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
      11    __builtin_memcpy(&a, (char *)&b + sizeof a, sizeof a);
      12  #else
      13    a = b;
      14  #endif
      15    return a;
      16  }
      17  
      18  /* { dg-final { scan-tree-dump "_\[0-9\]+ = \\(\[^)\]+\\) b" "forwprop4" } } */