From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 5801 invoked by alias); 27 Jan 2012 14:12:46 -0000 Received: (qmail 5789 invoked by uid 22791); 27 Jan 2012 14:12:45 -0000 X-SWARE-Spam-Status: No, hits=-2.9 required=5.0 tests=ALL_TRUSTED,AWL,BAYES_00 X-Spam-Check-By: sourceware.org Received: from localhost (HELO gcc.gnu.org) (127.0.0.1) by sourceware.org (qpsmtpd/0.43rc1) with ESMTP; Fri, 27 Jan 2012 14:12:33 +0000 From: "eric.batut at allegorithmic dot com" To: gcc-bugs@gcc.gnu.org Subject: [Bug target/48941] [arm gcc] NEON: Stack pointer operations performed even tho stack is not accessed at all in function. Date: Fri, 27 Jan 2012 14:40:00 -0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: target X-Bugzilla-Keywords: missed-optimization X-Bugzilla-Severity: normal X-Bugzilla-Who: eric.batut at allegorithmic dot com X-Bugzilla-Status: NEW X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Changed-Fields: CC Message-ID: In-Reply-To: References: X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated Content-Type: text/plain; charset="UTF-8" MIME-Version: 1.0 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 X-SW-Source: 2012-01/txt/msg03158.txt.bz2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48941 Eric Batut changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |eric.batut at allegorithmic | |dot com, Greta.Yorsh at arm | |dot com --- Comment #8 from Eric Batut 2012-01-27 14:11:34 UTC --- Any chance of seeing the work on this restart ? I found this bug while looking for something that would help (I raised bug 51980 for the same kind of issue, still seen on trunk), but the patch attached to this bug does not solve the issue for code that is rich with zip/uzp/trn intrinsics. This is a major limitation of arm-gcc with respect to performance-critical Neon code in my opinion.