From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 30763 invoked by alias); 19 Jun 2014 08:17:33 -0000 Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Id: List-Archive: List-Post: List-Help: Sender: gcc-bugs-owner@gcc.gnu.org Received: (qmail 30723 invoked by uid 48); 19 Jun 2014 08:17:30 -0000 From: "vincenzo.innocente at cern dot ch" To: gcc-bugs@gcc.gnu.org Subject: [Bug target/57796] AVX2 gather vectorization: code bloat and reduction of performance Date: Thu, 19 Jun 2014 08:17:00 -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: 4.9.0 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: vincenzo.innocente at cern dot ch X-Bugzilla-Status: UNCONFIRMED 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: 7bit X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-SW-Source: 2014-06/txt/msg01617.txt.bz2 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=57796 --- Comment #5 from vincenzo Innocente --- so with latest 4.9 gcc version 4.10.0 20140611 (experimental) [trunk revision 211467] (GCC) situation has not changed much (the scalar version is now faster!): I think that the cost of gather instructions is still under-estimated