Committed : [PATCH, LTO] add externally_visible attribute when necessary with -fwhole-program and resolution file.

["Bingfeng Mei" <bmei at broadcom dot com>]

Changed names of flags and committed  at r161483

2010-06-28  Bingfeng Mei <bmei@broadcom.com>

        * cgraph.h (struct varpool_node): new used_from_object_file flag.
        (struct cgraph_local_info): new used_from_object_file flag.
        * cgraph.c (dump_cgraph_node): dump used_from_object_file flag.
        (cgraph_clone_node): initialize used_from_object_file.
        (cgraph_create_virtual_clone): initialize used_from_object_file.
        * lto-symbtab.c (lto_symtab_merge_decls_1): Set
        used_from_object_file flags for symbols of LDPR_PREVAILING_DEF
        when compiling with -fwhole-program.
        (lto_symtab_resolve_symbols) Use LDPR_PREVAILING_DEF_IRONLY for
	internal resolver.
        * ipa.c (function_and_variable_visibility): Set externally_visible
        flag of varpool_node if used_from_object_file flag is set.
        (cgraph_externally_visible_p): check used_from_object_file flag.
        * doc/invoke.texi (-fwhole-program option): Change description of
        externally_visible attribute accordingly.
        * doc/extend.texi (externally_visible): Ditto.

> -----Original Message-----
> From: Jan Hubicka [mailto:hubicka@ucw.cz]
> Sent: 28 June 2010 10:47
> To: Bingfeng Mei
> Cc: Jan Hubicka; gcc-patches@gcc.gnu.org; Richard Guenther
> Subject: Re: PING: [PATCH, LTO] add externally_visible attribute when
> necessary with -fwhole-program and resolution file.
> 
> > Honza,
> >
> > Could you comment on the modified patch? As you suggested, I added
> > new "externally_visible_by_resolver" flags only for this purpose.
> > The relevant places in ipa.c are updated to check this flag. It
> passes tests
> > and is bootstrapped. OK for trunk?
> 
> The patch is OK.  Since we already have used_from_other_partition for
> similar purpose,
> I guess it would be better to call the flag used_from_object_file.
> 
> Honza
> >
> > Thanks,
> > Bingfeng
> >
> > 2010-06-21  Bingfeng Mei <bmei@broadcom.com>
> >
> >         * lto-symbtab.c (lto_symtab_merge_decls_1): Set
> >         externally_visible_by_resolver flags for symbols of
> >         LDPR_PREVAILING_DEF when compiling with -fwhole-program.
> >         (lto_symtab_resolve_symbols) Use LDPR_PREVAILING_DEF_IRONLY
> for
> > 	internal resolver.
> >         * ipa.c (function_and_variable_visibility): Set
> externally_visible
> >         flag of varpool_node if externally_visible_by_resolver flag
> is set.
> >         (cgraph_externally_visible_p): check
> externally_visible_by_resolver
> >         flag.
> >         * cgraph.h (struct varpool_node): new
> externally_visible_by_resolver
> >         flag.  (struct cgraph_local_info): new
> externally_visible_by_resolver
> >         flag.
> >         * cgraph.c (dump_cgraph_node): dump
> externally_visible_by_resolver
> >         flag.  (cgraph_clone_node): initialize
> externally_visible_by_resolver.
> >         (cgraph_create_virtual_clone): initialize
> externally_visible_by_resolver.
> >         * doc/invoke.texi (-fwhole-program option): Change
> description of
> >         externally_visible attribute accordingly.
> >         * doc/extend.texi (externally_visible): Ditto.
> >
> >
> 
>