jump.c (redirect_jump): Add delete_unused argument.

        * jump.c (redirect_jump): Add delete_unused argument.  Don't
        remove labels and code following when LABEL_NUSES goes to zero.
        (invert_jump): Likewise.
        (jump_optimize_1): Fix redirect/invert arguments.
        (do_cross_jump, thread_jumps): Likewise.
        * flow.c (split_edge): Likewise.
        * reorg.c (optimize_skip): Likewise.
        (reorg_redirect_jump, relax_delay_slots, dbr_schedule): Likewise.
        * profile.c (instrument_arcs): Likewise.
        * loop.c (find_and_verify_loops): Likewise.  Fix indentation.
        * rtl.h: Update prototypes.

From-SVN: r34033