* rtl.h (rebuild_jump_labels): Declare.
        * jump.c (jump_optimize_1): Renamed from jump_optimize.  Make static.
        Add new argument MARK_LABELS_ONLY.  Quit after mark_all_labels if
        requested.
        (jump_optimize, rebuild_jump_labels): New wrapper functions for
        jump_optimize_1.
        * toplev.c (rest_of_compilation): Use rebuild_jump_labels instead of
        running the entire jump optimizer.

From-SVN: r26327