From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id 61E38385042E; Tue, 27 Jul 2021 11:21:50 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 61E38385042E From: "rguenth at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/101639] vectorization with bool reduction Date: Tue, 27 Jul 2021 11:21:50 +0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: tree-optimization X-Bugzilla-Version: 12.0 X-Bugzilla-Keywords: missed-optimization X-Bugzilla-Severity: enhancement X-Bugzilla-Who: rguenth at gcc dot gnu.org X-Bugzilla-Status: NEW 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: blocked cf_reconfirmed_on bug_status everconfirmed Message-ID: In-Reply-To: References: 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: Tue, 27 Jul 2021 11:21:50 -0000 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D101639 Richard Biener changed: What |Removed |Added ---------------------------------------------------------------------------- Blocks| |53947 Last reconfirmed| |2021-07-27 Status|UNCONFIRMED |NEW Ever confirmed|0 |1 --- Comment #1 from Richard Biener --- vectorizable_reduction fails the 6692 scalar_dest =3D gimple_assign_lhs (stmt); 6693 scalar_type =3D TREE_TYPE (scalar_dest); 6694 if (!POINTER_TYPE_P (scalar_type) && !INTEGRAL_TYPE_P (scalar_typ= e) 6695 && !SCALAR_FLOAT_TYPE_P (scalar_type)) 6696 return false; 6697 6698 /* Do not try to vectorize bit-precision reductions. */ 6699 if (!type_has_mode_precision_p (scalar_type)) 6700 return false; check. I guess we could relax that for BIT_*_EXPR reductions. But then we run into t5.c:4:21: note: vect_is_simple_use: vectype vector(16) unsigned char t5.c:4:21: missed: mixed mask and nonmask vector types t5.c:1:6: missed: not vectorized: relevant stmt not supported: _7 =3D _4 & r_14; t5.c:4:21: missed: bad operation or unsupported loop bound. I guess that's mainly a fault of missed bool pattern handling of the reduction - we fail to make p[i] !=3D 0 available as non-boolean vector. Referenced Bugs: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D53947 [Bug 53947] [meta-bug] vectorizer missed-optimizations=