1  // { dg-do compile }
       2  // { dg-options "-O2 -fno-thread-jumps -fdisable-tree-fre1 -fdump-tree-evrp" }
       3  
       4  void link_error ();
       5  
       6  float
       7  foo (float x)
       8  {
       9    if (__builtin_isnan (x))
      10      {
      11        if (!__builtin_isnan (x))
      12  	link_error ();
      13      }
      14  }
      15  
      16  // { dg-final { scan-tree-dump-not "link_error" "evrp" } }