From: Jan Hubicka <hubicka@ucw.cz>
To: Jason Merrill <jason@redhat.com>
Cc: Jan Hubicka <hubicka@ucw.cz>, gcc-patches@gcc.gnu.org
Subject: Re: ODR merging and implicit typedefs
Date: Tue, 19 May 2015 22:17:00 -0000 [thread overview]
Message-ID: <20150519215636.GB93618@kam.mff.cuni.cz> (raw)
In-Reply-To: <555B9320.8060505@redhat.com>
> On 05/19/2015 01:33 PM, Jan Hubicka wrote:
> >I tracked down that those are implicit typedef created by create_implicit_typedef.
> >My patch made them no longer anonymous that in turn triggers the bogus diagnostics.
> >I do not think it is fully correct though - those types are not anonymous.
>
> Hmm? The types are anonymous:
>
> static struct
> {
> int moves_inserted;
> int copies_inserted;
> int insns_deleted;
> } stats;
>
> Here there is a variable named 'stats', but its type has no name.
Ah, sorry. I misread the declaration and thought it produce type stats. I suppose this cost
me an afternoon yesterday :)
Indeed this is anonymous type. I see it is anonymous even though it is not in
any namespace, so it makes sense that I needed to make an exception to my hack
looking for explicit namespace in the DECL_CONTEXT.
>
> >(I also wonder we we need to introdce a type name "._134") and pass it all the way down
> >to LTO.
>
> Anonymous types do need to have some name, so that we can mangle
> them. But I don't know if they need to remain past free_lang_data.
I think they can be killed there, as a minor optimization. I will look into it.
Thanks for the explanation.
Honza
>
> Jason
next prev parent reply other threads:[~2015-05-19 21:56 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-05-19 17:38 Jan Hubicka
2015-05-19 18:07 ` Markus Trippelsdorf
2015-05-19 21:56 ` Jason Merrill
2015-05-19 22:17 ` Jan Hubicka [this message]
2015-05-20 9:32 ` Eric Botcazou
2015-05-20 14:42 ` Jan Hubicka
2015-05-22 9:31 ` Eric Botcazou
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