1  /* Test for bit-field widths not integer constant expressions but
       2     folding to integer constants: PR 42439.  */
       3  /* { dg-do compile } */
       4  /* { dg-options "-O2" } */
       5  
       6  void
       7  f (void)
       8  {
       9    const int m = 1;
      10    ((void)(sizeof(struct { int i:!!m; })));
      11  }