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From: "dcb314 at hotmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/105210] gcc/auto-profile.cc:391:11: warning: variable 'level' set but not used
Date: Sun, 10 Apr 2022 20:12:17 +0000	[thread overview]
Message-ID: <bug-105210-4-HI1wWDyszu@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-105210-4@http.gcc.gnu.org/bugzilla/>

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105210

--- Comment #2 from David Binderman <dcb314 at hotmail dot com> ---
It seems that recent gcc trunk can't detect set-but-not-used in this code:

extern int g( int);

void f( int m)
{
        int n;

        n = 0;

        for (int i = 0; i < m; ++i)
        {
                if (g( i))
                {
                        ++n;
                }
        }
}

$ /home/dcb/gcc/results/bin/g++ -c -g -O2  -Wall -Wextra -pedantic apr10b.cc
$

Recent clang trunk can:

$ /home/dcb/llvm/results/bin/clang++ -c -g -O2  -Wall  apr10b.cc
apr10b.cc:8:6: warning: variable 'n' set but not used
[-Wunused-but-set-variable]
        int n;
            ^
1 warning generated.
$

  parent reply	other threads:[~2022-04-10 20:12 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-04-10 19:54 [Bug c/105210] New: " dcb314 at hotmail dot com
2022-04-10 20:04 ` [Bug c/105210] " dcb314 at hotmail dot com
2022-04-10 20:12 ` dcb314 at hotmail dot com [this message]
2022-04-10 21:58 ` [Bug gcov-profile/105210] " pinskia at gcc dot gnu.org
2022-04-10 22:10 ` egallager at gcc dot gnu.org
2022-04-10 22:29 ` pinskia at gcc dot gnu.org
2022-04-11  8:13 ` marxin at gcc dot gnu.org
2022-04-11 14:24 ` marxin at gcc dot gnu.org
2022-04-12 17:56 ` dcb314 at hotmail dot com
2022-04-12 18:45 ` marxin at gcc dot gnu.org
2022-05-05 13:05 ` marxin at gcc dot gnu.org
2022-05-05 15:43 ` dcb314 at hotmail dot com
2022-05-05 18:31 ` marxin at gcc dot gnu.org

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