tree-ssa-threadupdate.c (struct redirection_data): Delete outgoing_edge and intermediate_edge fields.

       * tree-ssa-threadupdate.c (struct redirection_data): Delete
        outgoing_edge and intermediate_edge fields.  Instead store the path.
        (redirection_data::hash): Hash on the last edge's destination index.
        (redirection_data::equal): Check the entire thread path.
        (lookup_redirectio_data): Corresponding changes.
        (create_edge_and_update_destination_phis): Likewise.
        (thread_single_edge): Likewise.

From-SVN: r203091