From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id 0C0D93858D1E; Sat, 26 Feb 2022 14:18:38 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 0C0D93858D1E From: "zhendong.su at inf dot ethz.ch" To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/104700] New: ICE on valid code at -O2 and -O3 with -fno-tree-ccp -fno-tree-dce -fno-tree-vrp on x86_64-linux-gnu: in find_or_generate_expression, at tree-ssa-pre.cc:2795 Date: Sat, 26 Feb 2022 14:18:37 +0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: new X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: tree-optimization X-Bugzilla-Version: unknown X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: zhendong.su at inf dot ethz.ch 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 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: Sat, 26 Feb 2022 14:18:38 -0000 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D104700 Bug ID: 104700 Summary: ICE on valid code at -O2 and -O3 with -fno-tree-ccp -fno-tree-dce -fno-tree-vrp on x86_64-linux-gnu: in find_or_generate_expression, at tree-ssa-pre.cc:2795 Product: gcc Version: unknown Status: UNCONFIRMED Severity: normal Priority: P3 Component: tree-optimization Assignee: unassigned at gcc dot gnu.org Reporter: zhendong.su at inf dot ethz.ch Target Milestone: --- It appears to be a recent regression. [627] % gcctk -v Using built-in specs. COLLECT_GCC=3Dgcctk COLLECT_LTO_WRAPPER=3D/local/suz-local/software/local/gcc-trunk/libexec/gcc= /x86_64-pc-linux-gnu/12.0.1/lto-wrapper Target: x86_64-pc-linux-gnu Configured with: ../gcc-trunk/configure --disable-bootstrap --prefix=3D/local/suz-local/software/local/gcc-trunk --enable-languages=3Dc= ,c++ --disable-werror --enable-multilib --with-system-zlib Thread model: posix Supported LTO compression algorithms: zlib gcc version 12.0.1 20220226 (experimental) [master r12-7395-gafeaaf4b352] (= GCC) [628] % [628] % gcctk -O2 -fno-tree-ccp -fno-tree-dce -fno-tree-vrp small.c during GIMPLE pass: pre small.c: In function =E2=80=98main=E2=80=99: small.c:2:5: internal compiler error: in find_or_generate_expression, at tree-ssa-pre.cc:2795 2 | int main() { | ^~~~ 0x1005c10 find_or_generate_expression ../../gcc-trunk/gcc/tree-ssa-pre.cc:2795 0x1005132 create_expression_by_pieces ../../gcc-trunk/gcc/tree-ssa-pre.cc:2951 0x10095b1 insert_into_preds_of_block ../../gcc-trunk/gcc/tree-ssa-pre.cc:3159 0x100b134 do_pre_regular_insertion ../../gcc-trunk/gcc/tree-ssa-pre.cc:3416 0x100b134 insert ../../gcc-trunk/gcc/tree-ssa-pre.cc:3809 0x100b134 execute ../../gcc-trunk/gcc/tree-ssa-pre.cc:4433 Please submit a full bug report, with preprocessed source (by using -freport-bug). Please include the complete backtrace with any bug report. See for instructions. [629] % [629] % cat small.c int a, b; int main() { int c =3D 2, d, e =3D 0; if (a) e =3D 2; int f, g =3D -(1L | (e && f && f & e)); if (g) L: g =3D c; c =3D 0; d =3D e * g; if (d) goto L; while (e) { int i =3D (a && b) * i; } return 0; }=