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From: Eric Botcazou <ebotcazou@libertysurf.fr> To: nobody@gcc.gnu.org Cc: gcc-prs@gcc.gnu.org, Subject: Re: optimization/8794: [3.2/3.3 regression] optimization improperly eliminates certain expressions Date: Thu, 05 Dec 2002 10:56:00 -0000 [thread overview] Message-ID: <20021205185601.26690.qmail@sources.redhat.com> (raw) The following reply was made to PR optimization/8794; it has been noted by GNATS. From: Eric Botcazou <ebotcazou@libertysurf.fr> To: reichelt@igpm.rwth-aachen.de Cc: gcc-bugs@gcc.gnu.org, gcc-prs@gcc.gnu.org, nobody@gcc.gnu.org, pageexec@freemail.hu, gcc-gnats@gcc.gnu.org Subject: Re: optimization/8794: [3.2/3.3 regression] optimization improperly eliminates certain expressions Date: Thu, 5 Dec 2002 19:49:40 +0100 > Old Synopsis: optimization improperly eliminates certain expressions > New Synopsis: [3.2/3.3 regression] optimization improperly eliminates > certain expressions > > State-Changed-From-To: open->analyzed > State-Changed-By: reichelt > State-Changed-When: Tue Dec 3 08:10:01 2002 > State-Changed-Why: > Confirmed. > > OK with gcc 2.95.x, but fails with gcc 3.0.x, 3.2-branch, > and mainline. (Checked also on mips-sgi-irix6.5.) Are you sure for mainline ? I can't reproduce it with: gcc version 3.3 20021205 (experimental) The fix seems to be: 2002-11-20 Jakub Jelinek <jakub@redhat.com> =09* combine.c (force_to_mode): Only replace with (not Y) if all bits in =09fuller_mask (not just mask) are set in C. http://gcc.gnu.org/ml/gcc-patches/2002-11/msg01045.html --=20 Eric Botcazou
next reply other threads:[~2002-12-05 18:56 UTC|newest] Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top 2002-12-05 10:56 Eric Botcazou [this message] -- strict thread matches above, loose matches on Subject: below -- 2002-12-06 0:56 Volker Reichelt 2002-12-05 12:06 Eric Botcazou 2002-12-05 11:06 Paolo Carlini 2002-12-03 8:10 reichelt
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