* config/arc/arc.md (annul_ret_delay_insn): New attribute.
        Use it in type "return" define_delay.
        * config/arc/arc.md (casesi_load): Use next_nonnote_insn to
        find JUMP_TABLE_DATA.
        * config/arc/arc.c (arc_pad_return): Save current_insn_predicate
        before / restore it after call to final_scan_insn.