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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug ipa/102982] [12 Regression] Dead Code Elimination Regression at -O3 (trunk vs 11.2.0) Date: Thu, 28 Oct 2021 11:42:10 +0000 [thread overview] Message-ID: <bug-102982-4-EM2JMCwK3u@http.gcc.gnu.org/bugzilla/> (raw) In-Reply-To: <bug-102982-4@http.gcc.gnu.org/bugzilla/> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102982 Richard Biener <rguenth at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |NEW Keywords| |missed-optimization Target Milestone|--- |12.0 Ever confirmed|0 |1 CC| |hubicka at gcc dot gnu.org, | |jamborm at gcc dot gnu.org, | |marxin at gcc dot gnu.org Last reconfirmed| |2021-10-28 Component|tree-optimization |ipa --- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> --- I'd say that's indeed "unfortunate". The main missing optimization though is treating c[0][0][0] = 0; as a "store" when trying to make 'c' constant, not realizing it stores the same value as the static initializer (after making it readonly we'd have to elide all such stores though). That would fix the testcase as to what is likely the desired trigger of the foo() call removal. Honza/Martin?
next prev parent reply other threads:[~2021-10-28 11:42 UTC|newest] Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-10-28 9:47 [Bug tree-optimization/102982] New: " theodort at inf dot ethz.ch 2021-10-28 9:48 ` [Bug tree-optimization/102982] " theodort at inf dot ethz.ch 2021-10-28 9:55 ` pinskia at gcc dot gnu.org 2021-10-28 11:42 ` rguenth at gcc dot gnu.org [this message] 2021-10-28 12:14 ` [Bug ipa/102982] " hubicka at kam dot mff.cuni.cz 2021-10-28 12:27 ` rguenth at gcc dot gnu.org 2021-10-28 12:34 ` Jan Hubicka 2021-10-28 12:34 ` hubicka at kam dot mff.cuni.cz 2022-05-06 8:31 ` [Bug ipa/102982] [12/13 " jakub at gcc dot gnu.org 2022-07-26 13:10 ` rguenth at gcc dot gnu.org 2023-05-08 12:23 ` [Bug ipa/102982] [12/13/14 " rguenth at gcc dot gnu.org
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