From: Rich Felker <dalias@libc.org>
To: James Cloos <cloos@jhcloos.com>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>,
musl@lists.openwall.com
Subject: Re: Broken GCC versions: 4.8.2 and 4.9.0
Date: Sun, 11 May 2014 17:20:30 -0400 [thread overview]
Message-ID: <20140511212030.GY26358@brightrain.aerifal.cx> (raw)
In-Reply-To: <m3vbtc5b8h.fsf@carbon.jhcloos.org>
On Sun, May 11, 2014 at 04:08:37PM -0400, James Cloos wrote:
> >>>>> "RF" == Rich Felker <dalias@libc.org> writes:
>
> RF> I've tested it on gcc.godbolt.org and others have tested with local
> RF> gcc 4.8.2 and 4.9.0, probably distro-provided (I didn't ask).
>
> I just tried debian-sid's 4.9. That does show the bug. As does their
> gcc-snapshot version (a 4.10 pre).
>
> Perhaps the distro(s) which have the bug with 4.8.2 backported the commit
> where the bug first occurs?
Sounds plausible. Maybe that will help find the offending commit.
> RF> I wonder if the broken GCC is using isl/cloog
>
> I use the graphite optimizer on my Gentoo box (which generated the
> assembly I quoted). The graphite code is only used when one or more
> of -floop-interchange -floop-strip-mine -floop-block are specified.
>
> Testing with those options doesn't change the results.
OK, ruled that out then.
Rich
next prev parent reply other threads:[~2014-05-11 21:20 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-05-11 1:05 Rich Felker
2014-05-11 16:10 ` Thomas Petazzoni
2014-05-11 16:19 ` Rich Felker
2014-05-11 18:46 ` James Cloos
2014-05-11 19:03 ` Rich Felker
2014-05-11 20:08 ` James Cloos
2014-05-11 21:20 ` Rich Felker [this message]
2014-05-12 1:23 ` Stephen Thomas
2014-05-12 9:28 ` Natanael Copa
2014-05-12 14:30 ` Anthony G. Basile
2014-05-14 7:49 ` Natanael Copa
2014-05-12 12:13 ` Rich Felker
2014-05-12 13:49 ` Thorsten Glaser
2014-05-12 13:56 ` James Cloos
2014-05-11 20:20 ` Matias A. Fonzo
2014-05-15 4:45 ` Rich Felker
2014-05-19 0:47 ` Rich Felker
2014-05-19 11:47 ` Szabolcs Nagy
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