1  /* { dg-do compile } */
       2  /* { dg-options "-O2" } */
       3  /* { dg-final { scan-assembler-not "builtin_bswap" } } */
       4  
       5  long foo (long a)
       6  {
       7    long b;
       8  
       9  #if __LP64__
      10    b = __builtin_bswap64 (a);
      11  #else
      12    b = __builtin_bswap32 (a);
      13  #endif
      14  
      15    return b;
      16  }