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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/95057] missing -Wunused-but-set-variable warning on multiple assignments, not all of them used
Date: Mon, 11 May 2020 12:53:56 +0000	[thread overview]
Message-ID: <bug-95057-4-uc3WgrHyI8@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-95057-4@http.gcc.gnu.org/bugzilla/>

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95057

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> ---
That is something this warning can't warn about.
The warning is a simple FE warning that uses two bits, one for whether certain
decl was used and one whether it was read.  The warning then diagnoses those
that have the former bit set and not the latter (of course, there are some
exceptions etc.).

  reply	other threads:[~2020-05-11 12:53 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-05-11 12:50 [Bug c/95057] New: " vincent-gcc at vinc17 dot net
2020-05-11 12:53 ` jakub at gcc dot gnu.org [this message]
2020-05-11 13:05 ` [Bug c/95057] " vincent-gcc at vinc17 dot net
2020-05-11 13:09 ` jakub at gcc dot gnu.org
2020-05-11 13:39 ` vincent-gcc at vinc17 dot net
2023-07-18 22:34 ` vincent-gcc at vinc17 dot net
2023-07-18 22:46 ` vincent-gcc at vinc17 dot net

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