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From: "aoliva at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/103302] wrong code with -fharden-compares
Date: Sun, 28 Nov 2021 21:24:34 +0000	[thread overview]
Message-ID: <bug-103302-4-xMeJT1KkyH@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-103302-4@http.gcc.gnu.org/bugzilla/>

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103302

--- Comment #5 from Alexandre Oliva <aoliva at gcc dot gnu.org> ---
Hello, Jim,

Thanks for the investigation, that's useful.  I guess the register allocator
shouldn't choose to coalesce registers when there's a clobber afterwards, or it
should drop the clobber, since otherwise it clobbers the coalesced set.

Anyway, I'm reworking the asm that prevents optimization because of bug 103149
and bug 103097, it might end up avoiding this unfortunate situation.  We'll
see...

  parent reply	other threads:[~2021-11-28 21:24 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-11-17 14:13 [Bug target/103302] New: " zsojka at seznam dot cz
2021-11-19 11:24 ` [Bug target/103302] " aoliva at gcc dot gnu.org
2021-11-26  0:30 ` wilson at gcc dot gnu.org
2021-11-26  3:28 ` wilson at gcc dot gnu.org
2021-11-26  5:20 ` wilson at gcc dot gnu.org
2021-11-28 21:24 ` aoliva at gcc dot gnu.org [this message]
2021-12-02  1:48 ` aoliva at gcc dot gnu.org
2021-12-02  6:18 ` zsojka at seznam dot cz
2021-12-02  6:25 ` zsojka at seznam dot cz
2021-12-03  9:29 ` aoliva at gcc dot gnu.org
2021-12-08  3:42 ` aoliva at gcc dot gnu.org
2021-12-08 18:19 ` wilson at gcc dot gnu.org
2021-12-09  2:39 ` cvs-commit at gcc dot gnu.org
2021-12-09  2:52 ` aoliva at gcc dot gnu.org
2022-02-23  7:42 ` aoliva at gcc dot gnu.org
2022-02-25  1:20 ` cvs-commit at gcc dot gnu.org
2022-02-25 23:28 ` aoliva at gcc dot gnu.org
2022-03-24 13:14 ` aoliva at gcc dot gnu.org
2022-12-07  2:21 ` pinskia at gcc dot gnu.org

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