From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 27296 invoked by alias); 9 Oct 2012 18:34:28 -0000 Received: (qmail 25074 invoked by uid 48); 9 Oct 2012 18:34:11 -0000 From: "amacleod at redhat dot com" To: gcc-bugs@gcc.gnu.org Subject: [Bug libstdc++/54861] std::atomic_signal_fence(std::memory_order_seq_cst) issues unnecessary mfence Date: Tue, 09 Oct 2012 18:34:00 -0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: libstdc++ X-Bugzilla-Keywords: X-Bugzilla-Severity: enhancement X-Bugzilla-Who: amacleod at redhat dot com X-Bugzilla-Status: NEW X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: amacleod at redhat dot com X-Bugzilla-Target-Milestone: --- X-Bugzilla-Changed-Fields: Status Last reconfirmed AssignedTo Ever Confirmed 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: 2012-10/txt/msg00864.txt.bz2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54861 Andrew Macleod changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |NEW Last reconfirmed| |2012-10-09 AssignedTo|unassigned at gcc dot |amacleod at redhat dot com |gnu.org | Ever Confirmed|0 |1 --- Comment #1 from Andrew Macleod 2012-10-09 18:34:08 UTC --- Created attachment 28402 --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=28402 patch to resolve the problem Just a typo in the header file where __atomic_thread_fence() built-in was being called instead of the __atomic_signal_fence() built-in function.