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From: "sgk at troutmask dot apl.washington.edu" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/51218] [4.7 Regression] Potential optimization bug
Date: Sat, 19 Nov 2011 05:39:00 -0000 [thread overview]
Message-ID: <bug-51218-4-WcxDq4B2oC@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-51218-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51218
--- Comment #5 from Steve Kargl <sgk at troutmask dot apl.washington.edu> 2011-11-19 03:47:39 UTC ---
On Sat, Nov 19, 2011 at 12:40:49AM +0000, kargl at gcc dot gnu.org wrote:
> > The miscompilation is triggered by -ffrontend-optimize, work-around: use
> > -fno-frontend-optimize.
> > Revision 171653 is dealing with the frontend optimization. If I am not
> > mistaken, it is the only change dealing with frontend optimization after
> > r171100, although I don't understand how this revision could cause a
> > miscompilation.
> >
> > The crash occurs in __mo_dec_matrix_MOD_sum_vector.
>
> Looks like a bug in the application, but the interesting
> coding style makes it hard for me to read. If one removes
>
> call delete_storage (x)
>
> in sum_vector the problem goes away. That is, it looks like
> over-active memory management hidden beneath a layer of
> obfusication.
>
Having looked at the code some more, I believe it is noconforming,
and this PR should be closed with INVALID,
next prev parent reply other threads:[~2011-11-19 3:48 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-11-18 23:14 [Bug fortran/51218] New: " anlauf at gmx dot de
2011-11-18 23:24 ` [Bug fortran/51218] " anlauf at gmx dot de
2011-11-19 0:05 ` dominiq at lps dot ens.fr
2011-11-19 0:41 ` dominiq at lps dot ens.fr
2011-11-19 2:06 ` kargl at gcc dot gnu.org
2011-11-19 5:39 ` sgk at troutmask dot apl.washington.edu [this message]
2011-11-19 9:28 ` anlauf at gmx dot de
2011-11-19 9:29 ` tkoenig at gcc dot gnu.org
2011-11-19 10:35 ` [Bug fortran/51218] [4.7 Regression] Potential optimization bug due to implicit_pure? anlauf at gmx dot de
2011-11-19 10:58 ` burnus at gcc dot gnu.org
2011-11-19 11:31 ` anlauf at gmx dot de
2011-11-19 11:44 ` tkoenig at netcologne dot de
2011-11-19 12:11 ` anlauf at gmx dot de
2011-11-19 16:34 ` sgk at troutmask dot apl.washington.edu
2011-11-19 16:48 ` sgk at troutmask dot apl.washington.edu
2011-11-19 17:44 ` kargl at gcc dot gnu.org
2011-11-21 9:05 ` burnus at gcc dot gnu.org
2011-11-21 19:48 ` anlauf at gmx dot de
2011-11-21 20:40 ` burnus at gcc dot gnu.org
2011-11-21 21:08 ` sgk at troutmask dot apl.washington.edu
2011-11-21 21:25 ` [Bug fortran/51218] [4.6/4.7 " burnus at gcc dot gnu.org
2011-11-22 23:11 ` anlauf at gmx dot de
2011-11-24 18:31 ` burnus at gcc dot gnu.org
2011-11-24 21:54 ` burnus at gcc dot gnu.org
2011-11-24 21:57 ` burnus at gcc dot gnu.org
2011-11-25 17:42 ` tkoenig at netcologne dot de
2011-11-25 18:49 ` burnus at gcc dot gnu.org
2011-11-26 12:15 ` tkoenig at netcologne dot de
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