From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id 203D43858032; Wed, 19 Jan 2022 06:03:27 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 203D43858032 From: "crazylht at gmail dot com" To: gcc-bugs@gcc.gnu.org Subject: [Bug target/103771] [12 Regression] Missed vectorization under -mavx512f -mavx512vl after r12-5489 Date: Wed, 19 Jan 2022 06:03:26 +0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: target X-Bugzilla-Version: 12.0 X-Bugzilla-Keywords: missed-optimization X-Bugzilla-Severity: normal X-Bugzilla-Who: crazylht at gmail dot com 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: 12.0 X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: 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: Wed, 19 Jan 2022 06:03:27 -0000 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D103771 --- Comment #25 from Hongtao.liu --- in fold_unary_loc ---cut from fold-const.cc----- 9276 else if (TREE_CODE (arg0) =3D=3D COND_EXPR) 9277 { 9278 tree arg01 =3D TREE_OPERAND (arg0, 1); 9279 tree arg02 =3D TREE_OPERAND (arg0, 2); 9280 if (! VOID_TYPE_P (TREE_TYPE (arg01))) 9281 arg01 =3D fold_build1_loc (loc, code, type, 9282 fold_convert_loc (loc, 9283 TREE_TYPE (op0), arg01)); 9284 if (! VOID_TYPE_P (TREE_TYPE (arg02))) 9285 arg02 =3D fold_build1_loc (loc, code, type, 9286 fold_convert_loc (loc, 9287 TREE_TYPE (op0), arg02)); 9288=3D> tem =3D fold_build3_loc (loc, COND_EXPR, type, TREE_OPERAN= D (arg0, 0), 9289 arg01, arg02); -----------end--------------- gcc always tries to simplify (convert (cond (cmp a b) c d) ---- > (cond (cm= p a b) (convert c) (convert d))=EF=BC=8C exactly the opposite of what this case= wants.=