From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 10415 invoked by alias); 29 Dec 2014 20:34:45 -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 10389 invoked by uid 48); 29 Dec 2014 20:34:40 -0000 From: "anlauf at gmx dot de" To: gcc-bugs@gcc.gnu.org Subject: [Bug target/57037] GCC does not generate non-temporal stores on i386 with SSE2+ Date: Mon, 29 Dec 2014 20:34:00 -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: 4.8.0 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: anlauf at gmx dot de 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: 2014-12/txt/msg02910.txt.bz2 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=57037 --- Comment #1 from Harald Anlauf --- (In reply to Harald Anlauf from comment #0) > gfortran (using -Ofast -fprefetch-loop-arrays) exactly > reproduces the performance of the Intel compiler without > temporal stores. It appears that this is an important > optimization. I tried a current snapshot from trunk (r219084) and found that -fprefetch-loop-arrays now gives an additional boost, matching Intel v15 for the above code, even without the streaming stores.