From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id 9C1F23858D33; Sun, 5 May 2024 10:08:13 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 9C1F23858D33 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1714903693; bh=ZOYeZmKnWHOrXxHaQSTNZIMaSUD2xTBfT1GdLTSergc=; h=From:To:Subject:Date:From; b=JsErhshaJWVEKOSZVfdttCubiNgio87oUhEFcq3e3ptYiauoYUO+vYyTAjSsiV7mN 1fWZzMOTWHUuBczrd5NJEQ8xHvU5zaOpW+9IoX5R3gWXKmQYIJHlwPN3y6ZFoRU0zA WDo/tngUUfDeX8YrdK95uTxno8dnOtWkSDfmjk/k= From: "zhendong.su at inf dot ethz.ch" To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/114948] New: ICE on valid code at -O3 with "-fno-tree-ccp -fno-tree-ch" on x86_64-linux-gnu: in check_loop_closed_ssa_def, at tree-ssa-loop-manip.cc:647 Date: Sun, 05 May 2024 10:08:13 +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=3D114948 Bug ID: 114948 Summary: ICE on valid code at -O3 with "-fno-tree-ccp -fno-tree-ch" on x86_64-linux-gnu: in check_loop_closed_ssa_def, at tree-ssa-loop-manip.cc:647 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 as it doesn't reproduce with 13.2 and earlier. Compiler Explorer: https://godbolt.org/z/szY6nz1W3 [522] % 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 20240505 (experimental) (GCC)=20 [523] %=20 [523] % gcctk -O3 -fno-tree-ccp -fno-tree-ch small.c during GIMPLE pass: cunroll small.c: In function =E2=80=98main=E2=80=99: small.c:2:5: internal compiler error: in check_loop_closed_ssa_def, at tree-ssa-loop-manip.cc:647 2 | int main() { | ^~~~ 0x89471d check_loop_closed_ssa_def ../../gcc-trunk/gcc/tree-ssa-loop-manip.cc:647 0x130e654 check_loop_closed_ssa_bb ../../gcc-trunk/gcc/tree-ssa-loop-manip.cc:661 0x131023e verify_loop_closed_ssa(bool, loop*) ../../gcc-trunk/gcc/tree-ssa-loop-manip.cc:697 0x131023e verify_loop_closed_ssa(bool, loop*) ../../gcc-trunk/gcc/tree-ssa-loop-manip.cc:681 0x12f54fe tree_unroll_loops_completely ../../gcc-trunk/gcc/tree-ssa-loop-ivcanon.cc:1569 0x12f5583 execute ../../gcc-trunk/gcc/tree-ssa-loop-ivcanon.cc:1673 0x12f5583 execute ../../gcc-trunk/gcc/tree-ssa-loop-ivcanon.cc:1663 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. [524] %=20 [524] % cat small.c int a, b, c, d; int main() { int *e =3D 0; for (; d; d++) L1: ; L2: if (a) { for (c =3D 0; c < 2; ++c) { int *h; int **i =3D &h; int **const *j =3D &i; int **const **k =3D &j; if (c) { if (b) goto L2; a =3D *e; } } goto L1; } return 0; }=