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From: "cvs-commit at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/101523] Huge number of combine attempts
Date: Wed, 27 Mar 2024 16:10:21 +0000	[thread overview]
Message-ID: <bug-101523-4-USFYV2outZ@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-101523-4@http.gcc.gnu.org/bugzilla/>

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101523

--- Comment #50 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Segher Boessenkool <segher@gcc.gnu.org>:

https://gcc.gnu.org/g:839bc42772ba7af66af3bd16efed4a69511312ae

commit r14-9692-g839bc42772ba7af66af3bd16efed4a69511312ae
Author: Segher Boessenkool <segher@kernel.crashing.org>
Date:   Wed Mar 27 14:09:52 2024 +0000

    combine: Don't combine if I2 does not change

    In some cases combine will "combine" an I2 and I3, but end up putting
    exactly the same thing back as I2 as was there before.  This is never
    progress, so we shouldn't do it, it will lead to oscillating behaviour
    and the like.

    If we want to canonicalise things, that's fine, but this is not the
    way to do it.

    2024-03-27  Segher Boessenkool  <segher@kernel.crashing.org>

            PR rtl-optimization/101523
            * combine.cc (try_combine): Don't do a 2-insn combination if
            it does not in fact change I2.

  parent reply	other threads:[~2024-03-27 16:10 UTC|newest]

Thread overview: 68+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-20  9:35 [Bug rtl-optimization/101523] New: " krebbel at gcc dot gnu.org
2021-07-20  9:41 ` [Bug rtl-optimization/101523] " krebbel at gcc dot gnu.org
2021-07-20  9:42 ` krebbel at gcc dot gnu.org
2021-07-20 21:27 ` segher at gcc dot gnu.org
2024-02-24  5:45 ` krebbel at gcc dot gnu.org
2024-02-25 10:53 ` segher at gcc dot gnu.org
2024-02-25 15:06 ` segher at gcc dot gnu.org
2024-03-02 18:43 ` sarah.kriesch at opensuse dot org
2024-03-02 21:04 ` sjames at gcc dot gnu.org
2024-03-03 19:32 ` segher at gcc dot gnu.org
2024-03-04  8:18 ` krebbel at gcc dot gnu.org
2024-03-04 16:31 ` segher at gcc dot gnu.org
2024-03-04 16:49 ` sarah.kriesch at opensuse dot org
2024-03-04 21:26 ` segher at gcc dot gnu.org
2024-03-05  7:31 ` krebbel at gcc dot gnu.org
2024-03-05 10:36 ` sarah.kriesch at opensuse dot org
2024-03-06 22:49 ` segher at gcc dot gnu.org
2024-03-06 22:53 ` segher at gcc dot gnu.org
2024-03-06 23:15 ` pinskia at gcc dot gnu.org
2024-03-07  9:26 ` krebbel at gcc dot gnu.org
2024-03-07  9:28 ` krebbel at gcc dot gnu.org
2024-03-07  9:34 ` krebbel at gcc dot gnu.org
2024-03-07 15:51 ` krebbel at gcc dot gnu.org
2024-03-07 15:52 ` krebbel at gcc dot gnu.org
2024-03-07 16:11 ` segher at gcc dot gnu.org
2024-03-07 16:19 ` segher at gcc dot gnu.org
2024-03-07 16:53 ` pinskia at gcc dot gnu.org
2024-03-07 16:57 ` pinskia at gcc dot gnu.org
2024-03-07 18:15 ` segher at gcc dot gnu.org
2024-03-07 19:42 ` segher at gcc dot gnu.org
2024-03-07 19:45 ` jakub at gcc dot gnu.org
2024-03-07 20:10 ` segher at gcc dot gnu.org
2024-03-07 20:17 ` krebbel at gcc dot gnu.org
2024-03-07 20:53 ` krebbel at gcc dot gnu.org
2024-03-20 11:53 ` [Bug target/101523] " rguenth at gcc dot gnu.org
2024-03-21  7:56 ` segher at gcc dot gnu.org
2024-03-21  8:15 ` rguenth at gcc dot gnu.org
2024-03-21  8:27 ` rguenth at gcc dot gnu.org
2024-03-21 12:57 ` segher at gcc dot gnu.org
2024-03-21 12:58 ` segher at gcc dot gnu.org
2024-03-21 13:15 ` rguenth at gcc dot gnu.org
2024-03-21 13:22 ` rguenth at gcc dot gnu.org
2024-03-22  8:07 ` rguenth at gcc dot gnu.org
2024-03-22  9:41 ` rguenth at gcc dot gnu.org
2024-03-22  9:42 ` sjames at gcc dot gnu.org
2024-03-22  9:42 ` sjames at gcc dot gnu.org
2024-03-22  9:52 ` rguenth at gcc dot gnu.org
2024-03-22 12:17 ` rguenth at gcc dot gnu.org
2024-03-22 12:38 ` rguenth at gcc dot gnu.org
2024-03-27 14:35 ` sarah.kriesch at opensuse dot org
2024-03-27 16:10 ` cvs-commit at gcc dot gnu.org [this message]
2024-03-27 16:53 ` [Bug rtl-optimization/101523] " segher at gcc dot gnu.org
2024-03-27 16:55 ` segher at gcc dot gnu.org
2024-04-03 10:58 ` rguenth at gcc dot gnu.org
2024-04-05 11:48 ` segher at gcc dot gnu.org
2024-04-05 12:20 ` rguenth at gcc dot gnu.org
2024-04-10  6:02 ` rguenth at gcc dot gnu.org
2024-04-10 15:51 ` segher at gcc dot gnu.org
2024-04-10 15:57 ` jakub at gcc dot gnu.org
2024-04-10 17:03 ` rguenth at gcc dot gnu.org
2024-04-10 17:45 ` sarah.kriesch at opensuse dot org
2024-05-04  6:00 ` segher at gcc dot gnu.org
2024-05-04 13:14 ` sarah.kriesch at opensuse dot org
2024-05-04 17:30 ` segher at gcc dot gnu.org
2024-05-06  9:21 ` rguenther at suse dot de
2024-05-06  9:40 ` segher at kernel dot crashing.org
2024-05-06  9:42 ` segher at gcc dot gnu.org
2024-05-06  9:46 ` rguenth at gcc dot gnu.org

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