tree-ssa-dom.c (record_temporary_equivalences): New function split out of dom_opt_dom_walker::after_dom_children.

       * tree-ssa-dom.c (record_temporary_equivalences): New function
        split out of dom_opt_dom_walker::after_dom_children.
        (dom_opt_dom_walker::thread_across_edge): Move common code
        in here from dom_opt_dom_walker::after_dom_children.
        (dom_opt_dom_walker::after_dom_children): Corresponding simplifictions.

From-SVN: r202742