[Bug middle-end/67239] [6 Regression] FAIL: 23_containers/unordered_set/insert/hash_policy.cc execution test

["hjl.tools at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67239

--- Comment #10 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to Richard Biener from comment #7)
> No, even for the false edge we can record proper expressions, see
> record_conds and how it handles the cases if the condition was true or false.
>

record_conds inserted many temporary expressions with both TRUE and FALSE
values. But

       /* If that didn't simplify to a constant see if we have recorded
           temporary expressions from taken edges.  */
        if (!val || TREE_CODE (val) != INTEGER_CST)
          {
            tree ops[2];
            ops[0] = lhs; 
            ops[1] = rhs; 
            val = vn_nary_op_lookup_pieces (2, gimple_cond_code (stmt),
                                            boolean_type_node, ops, NULL);
          }

only lookups and uses one value.