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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
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D80379

--- 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 tha=
t 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 :(=