From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id ABA5B3858037; Tue, 25 Jan 2022 09:06:19 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org ABA5B3858037 From: "crazylht at gmail dot com" To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/102583] [x86] Failure to optimize 32-byte integer vector conversion to 16-byte float vector properly when converting upper part with -mavx2 Date: Tue, 25 Jan 2022 09:06:19 +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: 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: --- 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: Tue, 25 Jan 2022 09:06:19 -0000 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D102583 --- Comment #3 from Hongtao.liu --- (In reply to Hongtao.liu from comment #2) > Simplify > _4 =3D VEC_PERM_EXPR <_1, _1, { 4, 5, 6, 7, 4, 5, 6, 7 }>; > _5 =3D BIT_FIELD_REF <_4, 128, 0>; >=20 > to >=20 > _5 =3D BIT_FIELD_REF <_1, 128, 128>; >=20 > in match.pd? maybe forwprop this 15 _1 =3D *srcp_7(D); 16 _2 =3D BIT_FIELD_REF <_1, 32, 128>; 17 _3 =3D BIT_FIELD_REF <_1, 32, 160>; 18 _4 =3D BIT_FIELD_REF <_1, 32, 192>; 19 _5 =3D BIT_FIELD_REF <_1, 32, 224>; 20 b_9 =3D {_2, _3, _4, _5}; directly into b_9 =3D BIT_FIELD_REF <*srcp_7, 128, 128>;=