From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 1363 invoked by alias); 26 Dec 2014 11:23:44 -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 1315 invoked by uid 48); 26 Dec 2014 11:23:38 -0000 From: "conradsand.arma at gmail dot com" To: gcc-bugs@gcc.gnu.org Subject: [Bug c++/64410] gcc 25% slower than clang 3.5 for adding complex numbers Date: Fri, 26 Dec 2014 11:23:00 -0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: c++ X-Bugzilla-Version: 4.9.2 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: conradsand.arma at gmail dot com 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/msg02750.txt.bz2 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64410 --- Comment #2 from Conrad --- (In reply to Marc Glisse from comment #1) > 3) the ABI for complex uses 2 separate double instead of a vector of 2 > double. Technically yes, but in practice aren't the 2 separate doubles guaranteed to be consecutive in memory?