[Bug tree-optimization/34385] [4.3 Regression] new miscompilation after PR34148 fix

["rguenth at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

------- Comment #6 from rguenth at gcc dot gnu dot org  2007-12-07 23:57 -------
First we hit

/* XXX: don't get into structures for now.  It brings much            
complication
     and little benefit.  */
if (struct_class_union_p (ptr_type) || struct_class_union_p 
               (alias_type))
  return false;

and then if you fix that

  /* If they are not SSA names, but contain SSA names, drop the warning
     because it cannot be displayed well.
     Also drop it if they both contain artificials.
     XXX: this is a hack, must figure out a better way to display them.  */
  if (filter_artificials)
    if ((find_first_artificial_name (get_ssa_base (object1))
         && find_first_artificial_name (get_ssa_base (object2)))
        || (TREE_CODE (object1) != SSA_NAME
            && contains_node_type_p (object1, SSA_NAME))
        || (TREE_CODE (object2) != SSA_NAME
            && contains_node_type_p (object2, SSA_NAME)))
      return false;


.....


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34385