PR 8866
        * rtl.h (MEM_NOTRAP_P): New.
        (MEM_COPY_ATTRIBUTES): Copy it.
        * rtlanal.c (may_trap_p): Check it.
        * expr.c (do_tablejump): Set it.
        * doc/rtl.texi (Flags): Document it.

        * cfgrtl.c (try_redirect_by_replacing_jump): Revert last three changes.

From-SVN: r65967