From: Jakub Jelinek <jakub@redhat.com>
To: Richard Kenner <kenner@vlsi1.ultra.nyu.edu>
Cc: ebotcazou@libertysurf.fr, gcc-patches@gcc.gnu.org, gcc@gcc.gnu.org
Subject: Re: GCC Status Report (2004-03-09)
Date: Fri, 19 Mar 2004 12:18:00 -0000 [thread overview]
Message-ID: <20040319081418.GJ31589@devserv.devel.redhat.com> (raw)
In-Reply-To: <10403190126.AA20411@vlsi1.ultra.nyu.edu>
On Thu, Mar 18, 2004 at 08:26:30PM -0500, Richard Kenner wrote:
> I don't know what to think about /u overall. It's becoming more and more
> clear that it's the source of a lot of trouble and probably is becoming
> less and less useful with aliasing code around anyway. I'd be in favor
> of trying the experiment of only using it on data that's *never* explicitly
> stored (like constant-pool or items with static initializers). So we
> disallow stores to /u.
That would be certainly safest and the UNCHANGING would really mean
unchanging. But I hope we could at least extend it to objects which are
*never* stored into in current function (see if the object is initialized
in the function currently expanded into RTL, if not, use RTX_UNCHANGING_P
for it as well, otherwise perhaps use some other bit or alias set).
Jakub
next prev parent reply other threads:[~2004-03-19 8:14 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-03-19 6:34 Richard Kenner
2004-03-19 12:18 ` Jakub Jelinek [this message]
-- strict thread matches above, loose matches on Subject: below --
2004-03-19 20:08 Richard Kenner
2004-03-19 14:22 Richard Kenner
2004-03-11 12:49 Richard Kenner
2004-03-11 14:09 ` Eric Botcazou
2004-03-11 12:15 Richard Kenner
2004-03-11 12:39 ` Eric Botcazou
2004-03-09 18:09 Mark Mitchell
2004-03-11 9:45 ` Eric Botcazou
2004-03-11 12:48 ` Jakub Jelinek
2004-03-11 21:11 ` Richard Henderson
2004-03-16 16:53 ` Mark Mitchell
2004-03-16 16:59 ` Paul Koning
2004-03-16 17:11 ` Ian Lance Taylor
2004-03-16 17:24 ` Zack Weinberg
2004-03-16 17:25 ` Paul Koning
2004-03-17 10:56 ` Eric Botcazou
2004-03-17 11:49 ` Eric Botcazou
2004-03-17 15:55 ` Mark Mitchell
2004-03-18 8:25 ` Eric Botcazou
2004-03-18 18:31 ` Eric Botcazou
2004-03-18 19:15 ` Mark Mitchell
2004-03-18 23:36 ` Eric Botcazou
2004-03-18 23:41 ` Jakub Jelinek
2004-03-19 1:23 ` Eric Botcazou
2004-03-19 14:31 ` Eric Botcazou
2004-03-19 19:29 ` Mark Mitchell
2004-03-19 20:04 ` Eric Botcazou
2004-03-19 20:23 ` Mark Mitchell
2004-03-20 19:51 ` Eric Botcazou
[not found] ` <405A3F26.2050100@codesourcery.com>
[not found] ` <200403190155.18981.ebotcazou@libertysurf.fr>
2004-03-19 6:42 ` Mark Mitchell
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