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From: "pluto at agmk dot net" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug other/28230] -O2 -fwrapv miscompiles gcc, binutils, gzip.
Date: Wed, 20 Sep 2006 20:44:00 -0000 [thread overview]
Message-ID: <20060920204425.27742.qmail@sourceware.org> (raw)
In-Reply-To: <bug-28230-7667@http.gcc.gnu.org/bugzilla/>
------- Comment #8 from pluto at agmk dot net 2006-09-20 20:44 -------
(In reply to comment #7)
> and one more misscompiled program -> gzip-1.3.5.
> this time 4.1.2 with -O2 -fwrapv produces wrong code.
>
> $ dd if=/dev/zero of=foo count=10
> $ gzip foo
> $ gzip -d foo.gz
> $ gzip: foo.gz: invalid compressed data--format violated
further investigation shows that only `-O1 -ftree-vrp -fwrapv'
miscompiles the gzip/inflate.o.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28230
next prev parent reply other threads:[~2006-09-20 20:44 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-07-03 8:40 [Bug other/28230] New: ICE during profiled bootstrap pluto at agmk dot net
2006-07-03 11:25 ` [Bug other/28230] " pluto at agmk dot net
2006-07-04 21:16 ` pluto at agmk dot net
2006-08-03 20:39 ` [Bug other/28230] ICE during bootstrap (-O2 -fwrapv issue) pluto at agmk dot net
2006-08-03 20:41 ` pluto at agmk dot net
2006-08-03 20:42 ` pluto at agmk dot net
2006-09-01 20:11 ` pluto at agmk dot net
2006-09-19 13:08 ` [Bug other/28230] -O2 -fwrapv miscompiles gcc, binutils, gzip pluto at agmk dot net
2006-09-20 20:44 ` pluto at agmk dot net [this message]
2006-09-20 20:45 ` pluto at agmk dot net
2006-09-20 23:31 ` pluto at agmk dot net
2006-09-21 3:31 ` [Bug tree-optimization/28230] [4.2 Regression] " pinskia at gcc dot gnu dot org
2006-09-21 3:37 ` pinskia at gcc dot gnu dot org
2006-09-24 9:58 ` steven at gcc dot gnu dot org
2006-09-24 10:05 ` steven at gcc dot gnu dot org
2006-09-24 10:08 ` steven at gcc dot gnu dot org
2006-09-24 10:11 ` steven at gcc dot gnu dot org
2006-10-01 22:56 ` mmitchel at gcc dot gnu dot org
2006-10-10 14:33 ` rguenth at gcc dot gnu dot org
2006-10-11 10:45 ` patchapp at dberlin dot org
2006-10-11 16:06 ` rguenth at gcc dot gnu dot org
2006-10-11 16:06 ` rguenth at gcc dot gnu dot org
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