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From: "rguenther at suse dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/57359] store motion causes wrong code for union access at -O3
Date: Mon, 20 Apr 2020 12:39:01 +0000 [thread overview]
Message-ID: <bug-57359-4-fPKEcqOgZh@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-57359-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=57359
--- Comment #26 from rguenther at suse dot de <rguenther at suse dot de> ---
On Mon, 20 Apr 2020, pascal_cuoq at hotmail dot com wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=57359
>
> --- Comment #25 from Pascal Cuoq <pascal_cuoq at hotmail dot com> ---
> Would it be reasonable to have three settings for -fstrict-aliasing, rather
> then the current two?
>
> - off
> - strict
> - assume-no-reuse
>
> (I would let you find a better name for the third one.)
I think it's clearly a GCC bug we need to fix, for users we might want to
give more control in telling the compiler about loop dependences.
So no, I don't like another -f[no-]strict-* option.
next prev parent reply other threads:[~2020-04-20 12:39 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-05-21 18:20 [Bug rtl-optimization/57359] New: wrong code for union access at -O3 on x86_64-linux dhazeghi at yahoo dot com
2013-05-21 18:26 ` [Bug rtl-optimization/57359] " pinskia at gcc dot gnu.org
2013-05-21 18:33 ` jakub at gcc dot gnu.org
2013-05-23 19:51 ` dhazeghi at yahoo dot com
2013-05-29 21:14 ` dhazeghi at yahoo dot com
2013-05-30 7:13 ` jakub at gcc dot gnu.org
2013-05-31 8:48 ` rguenth at gcc dot gnu.org
2013-05-31 16:32 ` dhazeghi at yahoo dot com
2013-05-31 21:07 ` joseph at codesourcery dot com
2013-06-03 19:15 ` dhazeghi at yahoo dot com
2013-06-04 12:37 ` [Bug tree-optimization/57359] " rguenth at gcc dot gnu.org
2020-04-20 7:15 ` [Bug tree-optimization/57359] store motion causes wrong code for union access at -O3 rguenth at gcc dot gnu.org
2020-04-20 8:57 ` rguenth at gcc dot gnu.org
2020-04-20 10:50 ` rguenth at gcc dot gnu.org
2020-04-20 12:03 ` rguenth at gcc dot gnu.org
2020-04-20 12:34 ` pascal_cuoq at hotmail dot com
2020-04-20 12:39 ` rguenther at suse dot de [this message]
2020-04-21 7:22 ` rguenth at gcc dot gnu.org
2020-04-27 9:17 ` rguenth at gcc dot gnu.org
2020-04-27 9:35 ` rguenth at gcc dot gnu.org
2020-04-27 12:48 ` rguenth at gcc dot gnu.org
2020-04-30 12:25 ` rguenth at gcc dot gnu.org
2020-05-07 10:12 ` cvs-commit at gcc dot gnu.org
2020-05-07 10:13 ` rguenth at gcc dot gnu.org
2020-05-11 12:56 ` rguenth at gcc dot gnu.org
2020-05-11 12:56 ` rguenth at gcc dot gnu.org
2020-05-11 14:53 ` rguenth at gcc dot gnu.org
2020-05-11 14:57 ` rguenth at gcc dot gnu.org
2020-05-12 6:26 ` rguenth at gcc dot gnu.org
2020-05-12 11:53 ` ro at gcc dot gnu.org
2020-05-12 12:13 ` rguenth at gcc dot gnu.org
2020-05-18 9:50 ` rguenth at gcc dot gnu.org
2020-06-11 15:55 ` pinskia at gcc dot gnu.org
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