From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id D4AA0385841C; Thu, 15 Aug 2024 07:45:55 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org D4AA0385841C DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1723707955; bh=Ui+SF0uaS/z/yjv3jYk0sVs2jfdRv6ZHErk8VN7vsbg=; h=From:To:Subject:Date:From; b=TYzQUNBIvJECnWUIP49YHBVPCSA/RkPLZ5KsRCx0LLVS1PGjV7gz2sROaXENVbOVF XufjM3rGxuH7lVmzdmvNTPGw1uIyzP63UJa1F8ESaK4MSAi1Ap+9a6IZ0p4qSlHVfY GRs7gZYnAhHG9A84zXfK3hOiLT13IR6bpBk5UwOE= From: "zhendong.su at inf dot ethz.ch" To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/116380] New: ICE on valid code at -O3 with "-fno-tree-scev-cprop" on x86_64-linux-gnu: Segmentation fault Date: Thu, 15 Aug 2024 07:45:55 +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 List-Id: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D116380 Bug ID: 116380 Summary: ICE on valid code at -O3 with "-fno-tree-scev-cprop" on x86_64-linux-gnu: Segmentation fault 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 regression from 12.*, and affects 13.* and later.=20 Compiler Explorer: https://godbolt.org/z/bvq6qbf4n [516] % 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/15.0.0/lto-wrapper Target: x86_64-pc-linux-gnu Configured with: ../gcc-trunk/configure --disable-bootstrap --enable-checking=3Dyes --prefix=3D/local/suz-local/software/local/gcc-trunk --enable-sanitizers --enable-languages=3Dc,c++ --disable-werror --enable-mu= ltilib Thread model: posix Supported LTO compression algorithms: zlib gcc version 15.0.0 20240815 (experimental) (GCC)=20 [517] %=20 [517] % gcctk -O3 -fno-tree-scev-cprop small.c during GIMPLE pass: ldist small.c: In function =E2=80=98main=E2=80=99: small.c:2:5: internal compiler error: Segmentation fault 2 | int main() { | ^~~~ 0x2505c05 internal_error(char const*, ...) ../../gcc-trunk/gcc/diagnostic-global-context.cc:491 0x119da33 crash_signal ../../gcc-trunk/gcc/toplev.cc:321 0x7f1ecfbec08f ??? =20=20=20=20=20=20=20 /build/glibc-LcI20x/glibc-2.31/signal/../sysdeps/unix/sysv/linux/x86_64/sig= action.c:0 0x13358d1 find_uses_to_rename_use ../../gcc-trunk/gcc/tree-ssa-loop-manip.cc:414 0x13358d1 find_uses_to_rename_bb ../../gcc-trunk/gcc/tree-ssa-loop-manip.cc:489 0x133742d find_uses_to_rename ../../gcc-trunk/gcc/tree-ssa-loop-manip.cc:521 0x133742d rewrite_into_loop_closed_ssa_1 ../../gcc-trunk/gcc/tree-ssa-loop-manip.cc:588 0x133742d rewrite_into_loop_closed_ssa(bitmap_head*, unsigned int) ../../gcc-trunk/gcc/tree-ssa-loop-manip.cc:628 0x124c35f loop_distribution::execute(function*) ../../gcc-trunk/gcc/tree-loop-distribution.cc:3969 0x124c82f execute ../../gcc-trunk/gcc/tree-loop-distribution.cc:4016 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. [518] %=20 [518] % cat small.c int a[3], b, c, d[3], e; int main() { for (; e < 3; e++) { a[0] =3D 0; b && (c =3D b); d[e] =3D 0; a[e] =3D 0; } return 0; }=