From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id 324253858418; Thu, 23 Dec 2021 14:11:52 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 324253858418 From: "k.even-mendoza at imperial dot ac.uk" To: gcc-bugs@gcc.gnu.org Subject: [Bug c/103816] New: ICE: in vect_build_slp_tree_2, at tree-vect-slp.c:1748 Date: Thu, 23 Dec 2021 14:11:52 +0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: new X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: c X-Bugzilla-Version: 12.0 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: k.even-mendoza at imperial dot ac.uk 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: Thu, 23 Dec 2021 14:11:52 -0000 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D103816 Bug ID: 103816 Summary: ICE: in vect_build_slp_tree_2, at tree-vect-slp.c:1748 Product: gcc Version: 12.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c Assignee: unassigned at gcc dot gnu.org Reporter: k.even-mendoza at imperial dot ac.uk Target Milestone: --- This program crashed with GCC-12 with -O2 and -O3: typedef enum { e } f; struct { f __attribute__((mode(__byte__))) a; f __attribute__((mode(__byte__))) b; f __attribute__((mode(__byte__))) c; f __attribute__((mode(__byte__))) d } g[]; void main() { g[0].b =3D (g[0].b & g[4].b) * g[2305843009213693952].c; } This code works fine with GCC-11. I tried several versions of GCC-12: 20211= 023, 20211118, and 20211216 on Ubuntu-18. The trace looks like this: =3D=3D=3D fuzzer-file-54092.c:7:1: warning: no semicolon at end of struct or union 7 | } g[]; | ^ fuzzer-file-54092.c:7:3: warning: array =E2=80=98g=E2=80=99 assumed to have= one element 7 | } g[]; | ^ during GIMPLE pass: slp fuzzer-file-54092.c: In function =E2=80=98main=E2=80=99: fuzzer-file-54092.c:8:6: internal compiler error: in vect_build_slp_tree_2,= at tree-vect-slp.c:1748 8 | void main() { g[0].b =3D (g[0].b & g[4].b) * g[2305843009213693952]= .c; } | ^~~~ 0x7d2c1c vect_build_slp_tree_2 .././../gcc-source/gcc/tree-vect-slp.c:1748 0x119b89d vect_build_slp_tree .././../gcc-source/gcc/tree-vect-slp.c:1549 0x119fe30 vect_build_slp_instance .././../gcc-source/gcc/tree-vect-slp.c:3025 0x11a5966 vect_analyze_slp(vec_info*, unsigned int) .././../gcc-source/gcc/tree-vect-slp.c:3388 0x11aa0ea vect_slp_analyze_bb_1 .././../gcc-source/gcc/tree-vect-slp.c:5762 0x11aa0ea vect_slp_region .././../gcc-source/gcc/tree-vect-slp.c:5864 0x11aa0ea vect_slp_bbs .././../gcc-source/gcc/tree-vect-slp.c:6056 0x11ac131 vect_slp_function(function*) .././../gcc-source/gcc/tree-vect-slp.c:6144 0x11b36e2 execute .././../gcc-source/gcc/tree-vectorizer.c:1503 Please submit a full bug report,=