1  // { dg-do compile }
       2  // { dg-options "-O2 -fdisable-tree-ethread -fdump-tree-evrp" }
       3  
       4  void link_error ();
       5  
       6  void
       7  foo (double x, double y)
       8  {
       9    if (x == y)
      10      {
      11        if (__builtin_isnan (x))
      12          link_error ();
      13        if (__builtin_isnan (y))
      14          link_error ();
      15      }
      16  }
      17  
      18  // { dg-final { scan-tree-dump-not "link_error" "evrp" } }