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From: "hubicka at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug lto/80379] Redundant note: code may be misoptimized unless -fno-strict-aliasing is used
Date: Mon, 09 Nov 2020 07:30:30 +0000 [thread overview]
Message-ID: <bug-80379-4-nsrWjnqOj8@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-80379-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80379
--- Comment #3 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
The problem here is that the hint is output at decl merging and
-fno-strict-aliasing is a function local flag. At that time we do not even know
what functions will be since units are not streamed in yet. This means that we
do not know if some unit has function that is -fno-strict-aliasing. So
supressing the warning does not fit the implementation very easily :(
next parent reply other threads:[~2020-11-09 7:30 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <bug-80379-4@http.gcc.gnu.org/bugzilla/>
2020-11-09 7:30 ` hubicka at gcc dot gnu.org [this message]
2024-06-11 10:21 ` Eric.Diaz.Fernandez at eurid dot eu
2024-06-11 15:26 ` andi-gcc at firstfloor dot org
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