1  /* { dg-do compile } */
       2  /* { dg-options "-O2 -ftree-tail-merge -fdump-tree-pre" } */
       3  
       4  int
       5  f (int c, int b, int d)
       6  {
       7    int r, e;
       8  
       9    if (c)
      10      r = b + d;
      11    else
      12      {
      13        e = b + d;
      14        r = e;
      15      }
      16  
      17    return r;
      18  }
      19  
      20  /* { dg-final { scan-tree-dump-times "if " 0 "pre"} } */
      21  /* { dg-final { scan-tree-dump-times "(?n)_.*\\+.*_" 1 "pre"} } */
      22  /* { dg-final { scan-tree-dump-not "Invalid sum" "pre"} } */