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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/108552] Linux i386 kernel 5.14 memory corruption for pre_compound_page() when gcov is enabled
Date: Fri, 27 Jan 2023 15:01:00 +0000 [thread overview]
Message-ID: <bug-108552-4-rKxMJZ5O9F@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-108552-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108552
--- Comment #25 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #24)
> Does
>
> diff --git a/gcc/tree-ssa-loop-ivopts.cc b/gcc/tree-ssa-loop-ivopts.cc
> index 0dd47910f97..f780c0ce08c 100644
> --- a/gcc/tree-ssa-loop-ivopts.cc
> +++ b/gcc/tree-ssa-loop-ivopts.cc
> @@ -2241,7 +2241,7 @@ may_be_nonaddressable_p (tree expr)
> {
> case VAR_DECL:
> /* Check if it's a register variable. */
> - return DECL_HARD_REGISTER (expr);
> + return DECL_HARD_REGISTER (expr) || DECL_NONALIASED (expr);
>
> case TARGET_MEM_REF:
> /* TARGET_MEM_REFs are translated directly to valid MEMs on the
>
> fix it?
Ah, reading more comments, no - it probably doesn't. Jakub correctly says
that there seems to be a data race necessary to trigger this, so it doesn't
seem to be a GCC issue?
next prev parent reply other threads:[~2023-01-27 15:01 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-01-26 8:00 [Bug c/108552] New: " feng.tang at intel dot com
2023-01-26 8:01 ` [Bug c/108552] " feng.tang at intel dot com
2023-01-26 8:02 ` [Bug target/108552] " pinskia at gcc dot gnu.org
2023-01-26 8:05 ` pinskia at gcc dot gnu.org
2023-01-26 8:13 ` feng.tang at intel dot com
2023-01-26 8:19 ` pinskia at gcc dot gnu.org
2023-01-26 11:35 ` feng.tang at intel dot com
2023-01-26 11:37 ` feng.tang at intel dot com
2023-01-26 11:39 ` feng.tang at intel dot com
2023-01-26 16:03 ` feng.tang at intel dot com
2023-01-26 16:07 ` feng.tang at intel dot com
2023-01-26 19:06 ` pinskia at gcc dot gnu.org
2023-01-26 19:22 ` torvalds@linux-foundation.org
2023-01-27 9:52 ` ubizjak at gmail dot com
2023-01-27 10:47 ` ubizjak at gmail dot com
2023-01-27 10:56 ` ubizjak at gmail dot com
2023-01-27 12:23 ` ubizjak at gmail dot com
2023-01-27 12:29 ` ubizjak at gmail dot com
2023-01-27 12:31 ` [Bug tree-optimization/108552] " ubizjak at gmail dot com
2023-01-27 12:51 ` ubizjak at gmail dot com
2023-01-27 12:52 ` ubizjak at gmail dot com
2023-01-27 13:17 ` jakub at gcc dot gnu.org
2023-01-27 13:40 ` ubizjak at gmail dot com
2023-01-27 14:14 ` jakub at gcc dot gnu.org
2023-01-27 14:59 ` rguenth at gcc dot gnu.org
2023-01-27 15:01 ` rguenth at gcc dot gnu.org [this message]
2023-01-27 15:13 ` rguenth at gcc dot gnu.org
2023-01-27 15:15 ` jakub at gcc dot gnu.org
2023-01-27 15:18 ` rguenth at gcc dot gnu.org
2023-01-27 15:20 ` jakub at gcc dot gnu.org
2023-01-27 17:00 ` torvalds@linux-foundation.org
2023-01-27 17:05 ` torvalds@linux-foundation.org
2023-01-27 17:15 ` torvalds@linux-foundation.org
2023-01-27 17:19 ` jakub at gcc dot gnu.org
2023-01-27 17:29 ` jakub at gcc dot gnu.org
2023-01-27 22:30 ` vmakarov at gcc dot gnu.org
2023-01-28 14:20 ` feng.tang at intel dot com
2023-01-28 14:27 ` feng.tang at intel dot com
2023-01-28 14:29 ` feng.tang at intel dot com
2023-01-28 23:40 ` hubicka at ucw dot cz
2023-01-29 10:08 ` jakub at gcc dot gnu.org
2023-01-30 7:05 ` rguenth at gcc dot gnu.org
2023-01-30 7:09 ` rguenth at gcc dot gnu.org
2023-01-30 8:06 ` torvalds@linux-foundation.org
2023-01-30 8:30 ` jakub at gcc dot gnu.org
2023-01-30 8:44 ` rguenth at gcc dot gnu.org
2023-01-30 8:46 ` rguenther at suse dot de
2023-01-30 18:54 ` torvalds@linux-foundation.org
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