1  /* PR optimization/8423.  */
       2  
       3  #define btest(x) __builtin_constant_p(x) ? "1" : "0"
       4  
       5  #ifdef __OPTIMIZE__
       6  void
       7  foo (char *i)
       8  {
       9    if (*i == '0')
      10      abort ();
      11  }
      12  #else
      13  void
      14  foo (char *i)
      15  {
      16  }
      17  #endif
      18  
      19  int
      20  main (void)
      21  {
      22    int size = sizeof (int);
      23    foo (btest (size));
      24    foo (btest (size));
      25    exit (0);
      26  }