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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/98817] Optimize if (a != b) a = b;
Date: Mon, 25 Jan 2021 09:25:05 +0000 [thread overview]
Message-ID: <bug-98817-4-XNNvOhmchW@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-98817-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98817
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
I'm not sure about this. Turning it into an unconditional store would mean
that the memory the reference points to must be writable, that might not be
always the case.
E.g. if it refers to a .rodata object, or an object within something mapped
PROT_READ only etc.
next prev parent reply other threads:[~2021-01-25 9:25 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-25 9:20 [Bug middle-end/98817] New: " antoshkka at gmail dot com
2021-01-25 9:25 ` jakub at gcc dot gnu.org [this message]
2021-01-25 9:34 ` [Bug middle-end/98817] " antoshkka at gmail dot com
2021-01-25 9:37 ` pinskia at gcc dot gnu.org
2021-01-25 9:41 ` jakub at gcc dot gnu.org
2021-01-25 9:52 ` antoshkka at gmail dot com
2021-01-25 9:57 ` rguenth at gcc dot gnu.org
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