From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id 3317B385AC26; Thu, 18 Nov 2021 16:02:07 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 3317B385AC26 From: "meissner at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/103317] New: Spec 2017 benchmark blender_r fails with -Ofast on PowerPc (power9, power10) Date: Thu, 18 Nov 2021 16:02:07 +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: 12.0 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: meissner 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 attachments.created 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, 18 Nov 2021 16:02:07 -0000 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D103317 Bug ID: 103317 Summary: Spec 2017 benchmark blender_r fails with -Ofast on PowerPc (power9, power10) Product: gcc Version: 12.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: tree-optimization Assignee: unassigned at gcc dot gnu.org Reporter: meissner at gcc dot gnu.org Target Milestone: --- Created attachment 51832 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=3D51832&action=3Dedit Preprocessed .i file that shows the bug (gzipped). As of November 17th, the current trunk compiler for GCC 12 fails when compi= ling the Spec 2017 benchmark blender_r for PowerPC using -Ofast. I see failures= for both power9 and power10 systems. Here is the traceback: libpng/png.c: In function 'png_build_gamma_table': libpng/png.c:2872:1: error: definition in block 19 does not dominate use in block 18 2872 | } | ^ for SSA_NAME: _57 in statement: shift_48 =3D PHI <_57(18), _58(19)> PHI argument _57 for PHI node shift_48 =3D PHI <_57(18), _58(19)> during GIMPLE pass: phiopt libpng/png.c:2872:1: internal compiler error: verify_ssa failed 0x10c5f64b verify_ssa(bool, bool) /home/meissner/fsf-src/trunk-2021-11-17/gcc/tree-ssa.c:1211 0x1080e97f execute_function_todo /home/meissner/fsf-src/trunk-2021-11-17/gcc/passes.c:2049 0x1080f613 execute_todo /home/meissner/fsf-src/trunk-2021-11-17/gcc/passes.c:2096 Please submit a full bug report, with preprocessed source if appropriate. I see it with -O2, -O3, and -Ofast, using -mcpu=3Dpower8, -mcpu=3Dpower9, a= nd -mcpu=3Dpower10 on PowerPC little endian systems. It did compile with the compiler I checked out on November 4th. I will attach the .i file compressed with gzip.=