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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/110228] [13/14 Regression] llvm-16 miscompiled due to an maybe uninitialized variable
Date: Sat, 01 Jul 2023 21:50:23 +0000 [thread overview]
Message-ID: <bug-110228-4-qKAF21VKHO@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-110228-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110228
--- Comment #23 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #22)
> (In reply to Zhendong Su from comment #21)
> > Another very likely related reproducer.
> Yes:
> <bb 3> [local count: 82077551]:
> a.0_1 = a;
> _27 = a.0_1 == 0;
> _5 = (int) _27;
> _28 = _5 | i_14;
> pretmp_45 = b;
> ...
> <bb 7> [local count: 200189151]:
> # i_14 = PHI <i_19(D)(2), i_13(6)>
I wonder if ccp1 in this case could cause the 1 to proped out of the loop. and
maybe we need some more isolation going on when it comes to using uninitialized
variables ...
next prev parent reply other threads:[~2023-07-01 21:50 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-06-12 17:19 [Bug middle-end/110228] New: [14 Regression] llvm-16 miscompilation on small case switch, minimized slyfox at gcc dot gnu.org
2023-06-12 17:27 ` [Bug middle-end/110228] " pinskia at gcc dot gnu.org
2023-06-12 17:30 ` pinskia at gcc dot gnu.org
2023-06-12 17:32 ` pinskia at gcc dot gnu.org
2023-06-12 17:39 ` pinskia at gcc dot gnu.org
2023-06-12 17:45 ` pinskia at gcc dot gnu.org
2023-06-12 17:49 ` pinskia at gcc dot gnu.org
2023-06-12 19:03 ` [Bug middle-end/110228] [14 Regression] llvm-16 miscompiled due to an maybe uninitialized and optimizations saying that the uninitialized has a nonzero bits of 1 pinskia at gcc dot gnu.org
2023-06-12 19:17 ` pinskia at gcc dot gnu.org
2023-06-15 4:50 ` pinskia at gcc dot gnu.org
2023-06-16 22:18 ` pinskia at gcc dot gnu.org
2023-06-16 22:23 ` pinskia at gcc dot gnu.org
2023-06-17 17:52 ` pinskia at gcc dot gnu.org
2023-06-17 20:52 ` pinskia at gcc dot gnu.org
2023-06-17 20:56 ` slyfox at gcc dot gnu.org
2023-06-17 21:04 ` jakub at gcc dot gnu.org
2023-06-17 21:38 ` [Bug middle-end/110228] [13/14 " pinskia at gcc dot gnu.org
2023-06-20 8:38 ` aldyh at gcc dot gnu.org
2023-06-24 0:01 ` [Bug middle-end/110228] [13/14 Regression] llvm-16 miscompiled due to an maybe uninitialized variable pinskia at gcc dot gnu.org
2023-06-30 2:19 ` pinskia at gcc dot gnu.org
2023-07-01 5:24 ` pinskia at gcc dot gnu.org
2023-07-01 21:37 ` zhendong.su at inf dot ethz.ch
2023-07-01 21:40 ` pinskia at gcc dot gnu.org
2023-07-01 21:50 ` pinskia at gcc dot gnu.org [this message]
2023-07-03 21:04 ` slyfox at gcc dot gnu.org
2023-07-03 21:52 ` slyfox at gcc dot gnu.org
2023-07-04 6:33 ` rguenth at gcc dot gnu.org
2023-07-04 6:54 ` rguenth at gcc dot gnu.org
2023-07-04 9:15 ` cvs-commit at gcc dot gnu.org
2023-07-04 9:18 ` rguenth at gcc dot gnu.org
2023-07-04 10:06 ` zhendong.su at inf dot ethz.ch
2023-07-04 10:28 ` rguenth at gcc dot gnu.org
2023-07-04 13:36 ` slyfox at gcc dot gnu.org
2023-07-04 13:41 ` rguenther at suse dot de
2023-07-04 15:11 ` slyfox at gcc dot gnu.org
2023-07-05 7:29 ` [Bug middle-end/110228] [13 " rguenth at gcc dot gnu.org
2023-07-05 8:23 ` cvs-commit at gcc dot gnu.org
2023-07-05 8:24 ` rguenth at gcc dot gnu.org
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