1  /* { dg-do compile } */
       2  /* { dg-options "-O2 -fdump-tree-cfg" } */
       3  extern void foo (void);
       4  extern int i;
       5  void
       6  bar (void)
       7  {
       8    switch (i)
       9      {
      10      case 0:
      11        foo ();
      12        break;
      13      case 1:
      14        break;
      15      }
      16  
      17  
      18    switch (i)
      19      {
      20      case 0:
      21        foo ();
      22        break;
      23      case 1:
      24        break;
      25      }
      26  }
      27  /* { dg-final { scan-tree-dump-times "case 1:" 0 "cfg" } } */