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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/98973] [11 regression] Wrong code with gcse store motion pass
Date: Fri, 05 Feb 2021 11:54:27 +0000 [thread overview]
Message-ID: <bug-98973-4-AWOAs9dxQF@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-98973-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98973
--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
Btw, -fgcse-sm is nowhere enabled by default (same applies to -fgcse-las), we
should consider removing these optimizations (though -fgcse-las at least sounds
useful and I wonder why it is not enabled). GCSE store-motion should be
re-implemented on GIMPLE, replacing the sink pass (there were previous
attempts in implementing SSU-PRE).
A comment in store-motion.c claims
/* This pass implements downward store motion.
As of May 1, 2009, the pass is not enabled by default on any target,
but bootstrap completes on ia64 and x86_64 with the pass enabled. */
I'm trying if enabling it by default still bootstraps & tests OK on x86-64
(also enabling gcse-las at the same time..)
next prev parent reply other threads:[~2021-02-05 11:54 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-05 9:10 [Bug rtl-optimization/98973] New: " krebbel at gcc dot gnu.org
2021-02-05 9:15 ` [Bug rtl-optimization/98973] " rguenth at gcc dot gnu.org
2021-02-05 10:02 ` krebbel at gcc dot gnu.org
2021-02-05 10:03 ` krebbel at gcc dot gnu.org
2021-02-05 10:04 ` krebbel at gcc dot gnu.org
2021-02-05 10:11 ` krebbel at gcc dot gnu.org
2021-02-05 11:54 ` rguenth at gcc dot gnu.org [this message]
2021-02-05 12:19 ` jakub at gcc dot gnu.org
2021-02-05 12:39 ` rguenth at gcc dot gnu.org
2021-02-26 12:51 ` rguenth at gcc dot gnu.org
2021-04-09 8:16 ` rguenth at gcc dot gnu.org
2021-04-12 13:16 ` ebotcazou at gcc dot gnu.org
2021-04-13 15:58 ` law at gcc dot gnu.org
2021-04-27 11:40 ` [Bug rtl-optimization/98973] [11/12 " jakub at gcc dot gnu.org
2021-07-28 7:05 ` rguenth at gcc dot gnu.org
2022-04-21 7:48 ` rguenth at gcc dot gnu.org
2023-05-29 10:04 ` [Bug rtl-optimization/98973] [11/12/13/14 " jakub at gcc dot gnu.org
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