1  /* { dg-do run } */
       2  /* { dg-options "-O" } */
       3  int
       4  main (void)
       5  {
       6    /* Test constant folding.  */
       7    extern void link_error (void);
       8  
       9    if (__builtin_bswap16(0xaabb) != 0xbbaa)
      10      link_error ();
      11  
      12    if (__builtin_bswap32(0xaabbccdd) != 0xddccbbaa)
      13      link_error ();
      14  
      15    if (__builtin_bswap64(0x1122334455667788ULL) != 0x8877665544332211ULL)
      16      link_error ();
      17  
      18    return 0;
      19  }