1  /* { dg-do compile } */
       2  /* { dg-options "-O2 -march=nocona" } */
       3  /* { dg-final { scan-assembler-not "bswap\[ \t\]" } } */
       4  
       5  int foo(int x)
       6  {
       7    int t = __builtin_bswap32 (x);
       8    return __builtin_bswap32 (t);
       9  }
      10