From: Jan Hubicka <hubicka@ucw.cz>
To: "H.J. Lu" <hjl.tools@gmail.com>
Cc: "Jan Hubicka" <hubicka@ucw.cz>, "Martin Liška" <mliska@suse.cz>,
"gcc-pat >> GCC Patches" <gcc-patches@gcc.gnu.org>
Subject: Re: [PATCH] ICF: move readonly decision for variables to the right place
Date: Fri, 06 Mar 2015 19:08:00 -0000 [thread overview]
Message-ID: <20150306190808.GA7764@kam.mff.cuni.cz> (raw)
In-Reply-To: <CAMe9rOpOYpXoHiHZq1o1TvkZHwr1JjeJQvCCSSYkpLvyMyz49Q@mail.gmail.com>
>
> This caused:
>
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65334
This is another alias issue exposed by ICF. Vectorizer attempts to increase an alignment of alias
by modifying its DECL_ALIGN, but it doesnot really achieve it - when outputting the definition we
use DECL_ALIGN of the ultimate_alias_target.
Frankly, increasing alias target is not safe thing to do: alias may be static,
while target interposable and we do not want code touching actual target to
assume greater alignment. I suppose only way to get this right is to make
varasm to walk all aliases and figure largest alignment assumed. I am workign
on a patch.
Honza
>
> --
> H.J.
prev parent reply other threads:[~2015-03-06 19:08 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-03-01 0:15 Martin Liška
2015-03-01 0:26 ` Jan Hubicka
2015-03-02 0:58 ` Jan Hubicka
2015-03-02 7:53 ` Jan Hubicka
2015-03-02 9:47 ` Martin Liška
2015-03-06 14:38 ` H.J. Lu
2015-03-06 19:08 ` Jan Hubicka [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20150306190808.GA7764@kam.mff.cuni.cz \
--to=hubicka@ucw.cz \
--cc=gcc-patches@gcc.gnu.org \
--cc=hjl.tools@gmail.com \
--cc=mliska@suse.cz \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).