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Message-ID: <m3vbtc5b8h.fsf@carbon.jhcloos.org>
Date: Sun, 11 May 2014 16:08:37 -0400
From: James Cloos <cloos@...loos.com>
To: Rich Felker <dalias@...c.org>
Cc: Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>, musl@...ts.openwall.com
Subject: Re: Broken GCC versions: 4.8.2 and 4.9.0
>>>>> "RF" == Rich Felker <dalias@...c.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?
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.
-JimC
--
James Cloos <cloos@...loos.com> OpenPGP: 0x997A9F17ED7DAEA6
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