From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id BFCA23858030; Thu, 21 Dec 2023 05:27:41 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org BFCA23858030 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1703136461; bh=6fIs/1ZyyPob0aNk1AJNnN1Zk7JQaZETqMDHXmcmngM=; h=From:To:Subject:Date:In-Reply-To:References:From; b=tkPmU6AIvZbCMyg62vEnLBRt/UlAKWH6p+7hZ8VVCI43BnkzvL3y4ci2hnQ580w6j u+nR2bR4REV7yjoa74sBkDSJhPJslUduu/V0eHK1zvwJsXJjqwcUfAsuw6JOnBTU5G BYRtvLxy8fnB06U3Pi9PCOssIClWC8r+RTcJ5V1Y= From: "fxue at os dot amperecomputing.com" To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/113091] Over-estimate SLP vector-to-scalar cost for non-live pattern statement Date: Thu, 21 Dec 2023 05:27:41 +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: 14.0 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: fxue at os dot amperecomputing.com 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: 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 List-Id: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D113091 --- Comment #3 from Feng Xue --- The function vect_bb_vectorization_profitable_p resorts to a recursive way = to identify scalar use, for this case, setting STMT_VINFO_LIVE_P or not would = not change scalar cost computation.=