From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id 1FE91385842E; Fri, 18 Nov 2022 07:27:14 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 1FE91385842E DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1668756434; bh=g2qimo4j14HMfqxPzZI9dx/dQT3pKwpNkEnk7ilx8ik=; h=From:To:Subject:Date:From; b=DrTN/4c999srxM7HnKher2LX571mdErUWr56Bw3w325kxGb6zYS849y2cotOiX5wx du/Su8eP9h/8PwdYiosVgoon624gYOXiiH2vADmHgtBC67mykTFbsV3+Qnh34tQXKV d0xJZIxTw9X5Vzjzd5HU76jwW3qmZ9OulClE9kxo= From: "aldot at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug middle-end/107743] New: expmed: extract_bit_field_1: maybe-uninitialized warning Date: Fri, 18 Nov 2022 07:27:13 +0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: new X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: middle-end X-Bugzilla-Version: 13.0 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: aldot at gcc dot gnu.org 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 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 List-Id: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D107743 Bug ID: 107743 Summary: expmed: extract_bit_field_1: maybe-uninitialized warning Product: gcc Version: 13.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: middle-end Assignee: unassigned at gcc dot gnu.org Reporter: aldot at gcc dot gnu.org Target Milestone: --- current trunk around r13-4134 /scratch/obj.x86_64/gcc-13.mine/./prev-gcc/xg++ -B/scratch/obj.x86_64/gcc-13.mine/./prev-gcc/ -B/opt/x86_64/gcc-13.mine/x86_64-pc-linux-gnu/bin/ -nostdinc++ -B/scratch/obj.x86_64/gcc-13.mine/prev-x86_64-pc-linux-gnu/libstdc++-v3/src= /.libs -B/scratch/obj.x86_64/gcc-13.mine/prev-x86_64-pc-linux-gnu/libstdc++-v3/lib= supc++/.libs -I/scratch/obj.x86_64/gcc-13.mine/prev-x86_64-pc-linux-gnu/libstdc++-v3/inc= lude/x86_64-pc-linux-gnu -I/scratch/obj.x86_64/gcc-13.mine/prev-x86_64-pc-linux-gnu/libstdc++-v3/inc= lude -I/scratch/src/gcc-13.mine/libstdc++-v3/libsupc++ -L/scratch/obj.x86_64/gcc-13.mine/prev-x86_64-pc-linux-gnu/libstdc++-v3/src= /.libs -L/scratch/obj.x86_64/gcc-13.mine/prev-x86_64-pc-linux-gnu/libstdc++-v3/lib= supc++/.libs -fno-PIE -c -O2 -g3 -ggdb3 -gdwarf-5 -pipe -fno-checking -gtoggle -DIN_G= CC=20=20 -fno-exceptions -fno-rtti -fasynchronous-unwind-tables -W -Wall -Wno-narrowing -Wwrite-strings -Wcast-qual -Wmissing-format-attribute -Woverloaded-virtual -pedantic -Wno-long-long -Wno-variadic-macros -Wno-overlength-strings -fno-common -DHAVE_CONFIG_H -I. -I. -I../../../src/gcc-13.mine/gcc -I../../../src/gcc-13.mine/gcc/. -I../../../src/gcc-13.mine/gcc/../include -I../../../src/gcc-13.mine/gcc/../libcpp/include -I../../../src/gcc-13.mine/gcc/../libcody=20 -I../../../src/gcc-13.mine/gcc/../libdecnumber -I../../../src/gcc-13.mine/gcc/../libdecnumber/bid -I../libdecnumber -I../../../src/gcc-13.mine/gcc/../libbacktrace -o expmed.o -MT expmed.o -= MMD -MP -MF ./.deps/expmed.TPo ../../../src/gcc-13.mine/gcc/expmed.cc ../../../src/gcc-13.mine/gcc/expmed.cc: In function 'rtx_def* extract_bit_field_1(rtx, poly_uint64, poly_uint64, int, rtx, machine_mode, machine_mode, bool, bool, rtx_def**)': ../../../src/gcc-13.mine/gcc/expmed.cc:1838:45: warning: '*(unsigned int*)((char*)&imode + offsetof(scalar_int_mode, scalar_int_mode::m_mode))' = may be used uninitialized [-Wmaybe-uninitialized] 1838 | rtx sub =3D extract_bit_field_as_subreg (mode1, op0, imode, | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~ 1839 | bitsize, bitnum); | ~~~~~~~~~~~~~~~~ ../../../src/gcc-13.mine/gcc/expmed.cc:1798:19: note: '*(unsigned int*)((char*)&imode + offsetof(scalar_int_mode, scalar_int_mode::m_mode))' = was declared here 1798 | scalar_int_mode imode; | ^~~~~=