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From: "rguenther at suse dot de" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug middle-end/104550] bogus warning from -Wuninitialized + -ftrivial-auto-var-init=pattern Date: Thu, 17 Feb 2022 07:54:55 +0000 [thread overview] Message-ID: <bug-104550-4-HkVQPPH0Z8@http.gcc.gnu.org/bugzilla/> (raw) In-Reply-To: <bug-104550-4@http.gcc.gnu.org/bugzilla/> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104550 --- Comment #12 from rguenther at suse dot de <rguenther at suse dot de> --- On Wed, 16 Feb 2022, qinzhao at gcc dot gnu.org wrote: > https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104550 > > --- Comment #7 from qinzhao at gcc dot gnu.org --- > (In reply to rguenther@suse.de from comment #6) > > > --- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> --- > > > Maybe __builtin_clear_padding lowering should mark the load "MEM[(struct > > > vx_audio_level *)&info]" as not needing a warning. > > > > Maybe padding clearing shouldn’t be exposed early but handled by > > .DEFFEREd_INIT expansion? > > > > If padding clearing is exposed too late till RTL expansion, some tree > optimization will not be able to be applied on the expanded stores? Doesn't the same argument apply to .DEFERRED_INIT itself? Dependent on the .DEFERRED_INIT expansion strathegy the padding clearing might be unneccessary (for example when using memset())? > the approach to mark the load "MEM" as not needing a warning might be better? It's probably a good thing anyway, the 'R' in the RMW cycle isn't really a use.
next prev parent reply other threads:[~2022-02-17 7:54 UTC|newest] Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top 2022-02-15 15:49 [Bug middle-end/104550] New: " qinzhao at gcc dot gnu.org 2022-02-15 15:50 ` [Bug middle-end/104550] " qinzhao at gcc dot gnu.org 2022-02-15 15:52 ` qinzhao at gcc dot gnu.org 2022-02-15 21:33 ` qinzhao at gcc dot gnu.org 2022-02-15 21:38 ` pinskia at gcc dot gnu.org 2022-02-15 22:38 ` qing.zhao at oracle dot com 2022-02-16 10:33 ` rguenther at suse dot de 2022-02-16 15:05 ` qinzhao at gcc dot gnu.org 2022-02-16 15:38 ` jakub at gcc dot gnu.org 2022-02-16 16:24 ` qinzhao at gcc dot gnu.org 2022-02-16 16:44 ` jakub at gcc dot gnu.org 2022-02-16 16:57 ` qinzhao at gcc dot gnu.org 2022-02-17 7:54 ` rguenther at suse dot de [this message] 2022-02-17 8:01 ` rguenther at suse dot de 2022-02-17 16:47 ` qing.zhao at oracle dot com 2022-02-17 16:53 ` jakub at gcc dot gnu.org 2022-02-18 6:53 ` rguenther at suse dot de 2022-02-18 17:16 ` qinzhao at gcc dot gnu.org 2022-02-18 20:14 ` qinzhao at gcc dot gnu.org 2022-02-21 7:56 ` rguenth at gcc dot gnu.org 2022-02-21 15:21 ` qing.zhao at oracle dot com 2022-02-28 15:58 ` cvs-commit at gcc dot gnu.org 2022-02-28 16:00 ` qinzhao at gcc dot gnu.org
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