From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id A6CC8398680D; Wed, 9 Jun 2021 14:29:28 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org A6CC8398680D From: "suochenyao at 163 dot com" To: gcc-bugs@gcc.gnu.org Subject: [Bug ipa/100994] New: wrong code with "-O1 -finline-small-functions -fipa-cp" Date: Wed, 09 Jun 2021 14:29:28 +0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: new X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: ipa X-Bugzilla-Version: 12.0 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: suochenyao at 163 dot com X-Bugzilla-Status: UNCONFIRMED X-Bugzilla-Resolution: X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: bug_id short_desc product version bug_status bug_severity priority component assigned_to reporter cc target_milestone Message-ID: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-BeenThere: gcc-bugs@gcc.gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Gcc-bugs mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 09 Jun 2021 14:29:28 -0000 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D100994 Bug ID: 100994 Summary: wrong code with "-O1 -finline-small-functions -fipa-cp" Product: gcc Version: 12.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: ipa Assignee: unassigned at gcc dot gnu.org Reporter: suochenyao at 163 dot com CC: marxin at gcc dot gnu.org Target Milestone: --- ***************************************************************************= **** OS and Platform: CentOS Linux release 7.8.2003 (Core), x86_64 GNU/Linux ***************************************************************************= **** Program: struct a { unsigned b : 4; unsigned c : 9; } const d; int e, f, g; char h; short i; static int(j)() { return 0; } static int k(const struct a l) { for (; g; j() & l.c) ; e =3D 1; i =3D e + 6; for (; e !=3D 7; e =3D i) h =3D f || l.b; int m =3D l.c; return 0; } void main() { k(d); } ***************************************************************************= **** gcc version: $ gcc -v Using built-in specs. COLLECT_GCC=3D/data/bin/gcc-dev/bin/gcc COLLECT_LTO_WRAPPER=3D/data/bin/gcc-dev/libexec/gcc/x86_64-pc-linux-gnu/12.= 0.0/lto-wrapper Target: x86_64-pc-linux-gnu Configured with: ../configure --prefix=3D/data/bin/gcc-dev --disable-multil= ib --enable-languages=3Dc,c++ Thread model: posix Supported LTO compression algorithms: zlib gcc version 12.0.0 20210608 (experimental) (GCC) git version: 1afa4facb9348cac0349ff9c30066aa25a3608f7 ***************************************************************************= **** Command Lines: $ gcc -O1 -finline-small-functions -fipa-cp -Wall -Wextra -fno-strict-alias= ing -fwrapv a.c -o a1.out a.c: In function =E2=80=98k=E2=80=99: a.c:10:17: warning: value computed is not used [-Wunused-value] 10 | for (; g; j() & l.c) | ~~~~^~~~~ a.c:16:7: warning: unused variable =E2=80=98m=E2=80=99 [-Wunused-variable] 16 | int m =3D l.c; | ^ a.c: At top level: a.c:19:6: warning: return type of =E2=80=98main=E2=80=99 is not =E2=80=98in= t=E2=80=99 [-Wmain] 19 | void main() { k(d); } | ^~~~ $ /data/bin/gcc-dev/bin/gcc a.c -o a2.out $ ./a1.out Segmentation fault (core dumped) $ ./a2.out $=