From owner-freebsd-arm@FreeBSD.ORG Sun Apr 28 02:45:14 2013 Return-Path: Delivered-To: arm@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by hub.freebsd.org (Postfix) with ESMTP id AC8FAADC for ; Sun, 28 Apr 2013 02:45:14 +0000 (UTC) (envelope-from gonzo@id.bluezbox.com) Received: from id.bluezbox.com (id.bluezbox.com [88.198.91.248]) by mx1.freebsd.org (Postfix) with ESMTP id 690E914FF for ; Sun, 28 Apr 2013 02:45:14 +0000 (UTC) Received: from [88.198.91.248] (helo=[IPv6:::1]) by id.bluezbox.com with esmtpsa (TLSv1:CAMELLIA256-SHA:256) (Exim 4.77 (FreeBSD)) (envelope-from ) id 1UWHAS-000Iw6-T0 for arm@freebsd.org; Sat, 27 Apr 2013 19:16:46 -0700 Message-ID: <517C868B.4060002@bluezbox.com> Date: Sat, 27 Apr 2013 19:16:43 -0700 From: Oleksandr Tymoshenko User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:17.0) Gecko/20130328 Thunderbird/17.0.5 MIME-Version: 1.0 To: arm@freebsd.org Subject: clang/ARM regression Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: gonzo@id.bluezbox.com X-Spam-Level: -- X-Spam-Report: Spam detection software, running on the system "id.bluezbox.com", has identified this incoming email as possible spam. The original message has been attached to this so you can view it (if it isn't spam) or label similar future email. If you have any questions, see The administrator of that system for details. Content preview: Hi, There seems to be some kind of regression in recently imported clang on ARM. Beaglebone kernel built using clang with WITNESS enabled panics on boot. If I change optimization flags from -O to -O0 it works fine. I'm trying to isolate test case but it panics fairly early in boot process so it's not easy. If somebody tracks clang development and aware of known issues that might cause it - please share. [...] Content analysis details: (-2.9 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -1.0 ALL_TRUSTED Passed through trusted hosts only via SMTP -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] X-BeenThere: freebsd-arm@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: Porting FreeBSD to the StrongARM Processor List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 28 Apr 2013 02:45:14 -0000 Hi, There seems to be some kind of regression in recently imported clang on ARM. Beaglebone kernel built using clang with WITNESS enabled panics on boot. If I change optimization flags from -O to -O0 it works fine. I'm trying to isolate test case but it panics fairly early in boot process so it's not easy. If somebody tracks clang development and aware of known issues that might cause it - please share. So far I tried fix from this bug but it didn't help: http://llvm.org/bugs/show_bug.cgi?id=15581