From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Paul Eggert Newsgroups: gmane.comp.lib.gnulib.bugs,gmane.emacs.devel Subject: Re: more macOS Clang assume warnings Date: Tue, 25 Aug 2020 17:44:48 -0700 Organization: UCLA Computer Science Department Message-ID: <6c0625f1-1c9c-0a0a-b598-fbd79452f6ee@cs.ucla.edu> References: <5B1F57F1-C671-40D8-8272-2C90E42F2538@acm.org> <87c35fba-515b-18ca-598c-72a0baa94113@cs.ucla.edu> <1637416.KCIPBWfl1D@omega> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="11561"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 Cc: =?UTF-8?Q?Mattias_Engdeg=c3=a5rd?= , bug-gnulib@gnu.org, emacs-devel To: Bruno Haible Original-X-From: bug-gnulib-bounces+gnu-bug-gnulib=m.gmane-mx.org@gnu.org Wed Aug 26 02:45:02 2020 Return-path: Envelope-to: gnu-bug-gnulib@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1kAjYj-0002rz-E6 for gnu-bug-gnulib@m.gmane-mx.org; Wed, 26 Aug 2020 02:45:01 +0200 Original-Received: from localhost ([::1]:39238 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kAjYh-0007sQ-4p for gnu-bug-gnulib@m.gmane-mx.org; Tue, 25 Aug 2020 20:44:59 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:56624) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kAjYe-0007ry-8m; Tue, 25 Aug 2020 20:44:56 -0400 Original-Received: from zimbra.cs.ucla.edu ([131.179.128.68]:46766) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kAjYa-00048S-Ua; Tue, 25 Aug 2020 20:44:54 -0400 Original-Received: from localhost (localhost [127.0.0.1]) by zimbra.cs.ucla.edu (Postfix) with ESMTP id 88F6E1600A5; Tue, 25 Aug 2020 17:44:49 -0700 (PDT) Original-Received: from zimbra.cs.ucla.edu ([127.0.0.1]) by localhost (zimbra.cs.ucla.edu [127.0.0.1]) (amavisd-new, port 10032) with ESMTP id 5ApEktXxsdHV; Tue, 25 Aug 2020 17:44:48 -0700 (PDT) Original-Received: from localhost (localhost [127.0.0.1]) by zimbra.cs.ucla.edu (Postfix) with ESMTP id D7F221600BA; Tue, 25 Aug 2020 17:44:48 -0700 (PDT) X-Virus-Scanned: amavisd-new at zimbra.cs.ucla.edu Original-Received: from zimbra.cs.ucla.edu ([127.0.0.1]) by localhost (zimbra.cs.ucla.edu [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id CHqOBy_4Uox5; Tue, 25 Aug 2020 17:44:48 -0700 (PDT) Original-Received: from [192.168.1.9] (cpe-75-82-69-226.socal.res.rr.com [75.82.69.226]) by zimbra.cs.ucla.edu (Postfix) with ESMTPSA id A56881600A5; Tue, 25 Aug 2020 17:44:48 -0700 (PDT) Autocrypt: addr=eggert@cs.ucla.edu; prefer-encrypt=mutual; keydata= LS0tLS1CRUdJTiBQR1AgUFVCTElDIEtFWSBCTE9DSy0tLS0tCgptUUlOQkV5QWNtUUJFQURB QXlIMnhvVHU3cHBHNUQzYThGTVpFb243NGRDdmM0K3ExWEEySjJ0QnkycHdhVHFmCmhweHhk R0E5Smo1MFVKM1BENGJTVUVnTjh0TFowc2FuNDdsNVhUQUZMaTI0NTZjaVNsNW04c0thSGxH ZHQ5WG0KQUF0bVhxZVpWSVlYL1VGUzk2ZkR6ZjR4aEVtbS95N0xiWUVQUWRVZHh1NDd4QTVL aFRZcDVibHRGM1dZRHoxWQpnZDdneDA3QXV3cDdpdzdlTnZub0RUQWxLQWw4S1lEWnpiRE5D UUdFYnBZM2VmWkl2UGRlSStGV1FONFcra2doCnkrUDZhdTZQcklJaFlyYWV1YTdYRGRiMkxT MWVuM1NzbUUzUWpxZlJxSS9BMnVlOEpNd3N2WGUvV0szOEV6czYKeDc0aVRhcUkzQUZINmls QWhEcXBNbmQvbXNTRVNORnQ3NkRpTzFaS1FNcjlhbVZQa25qZlBtSklTcWRoZ0IxRApsRWR3 MzRzUk9mNlY4bVp3MHhmcVQ2UEtFNDZMY0ZlZnpzMGtiZzRHT1JmOHZqRzJTZjF0azVlVThN Qml5Ti9iClowM2JLTmpOWU1wT0REUVF3dVA4NGtZTGtYMndCeHhNQWhCeHdiRFZadWR6eERa SjFDMlZYdWpDT0pWeHEya2wKakJNOUVUWXVVR3FkNzVBVzJMWHJMdzYrTXVJc0hGQVlBZ1Jy NytLY3dEZ0JBZndoU In-Reply-To: <1637416.KCIPBWfl1D@omega> Content-Language: en-US Received-SPF: pass client-ip=131.179.128.68; envelope-from=eggert@cs.ucla.edu; helo=zimbra.cs.ucla.edu X-detected-operating-system: by eggs.gnu.org: First seen = 2020/08/25 20:44:49 X-ACL-Warn: Detected OS = Linux 3.1-3.10 X-Spam_score_int: -67 X-Spam_score: -6.8 X-Spam_bar: ------ X-Spam_report: (-6.8 / 5.0 requ) BAYES_00=-1.9, NICE_REPLY_A=-2.602, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: bug-gnulib@gnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Gnulib discussion list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-gnulib-bounces+gnu-bug-gnulib=m.gmane-mx.org@gnu.org Original-Sender: "bug-gnulib" Xref: news.gmane.io gmane.comp.lib.gnulib.bugs:42754 gmane.emacs.devel:254234 Archived-At: On 8/25/20 5:01 PM, Bruno Haible wrote: > It has already been fixed: clang >= 9 optimizes well with just > __builtin_unreachable and no use of __builtin_assume. So we're adding all this complexity just for a minor performance tweak for an old Clang version? Seems overkill. Even if we keep this stuff, a comment should mention that it's just for Clang 8 (or is it Clang 8 and earlier?).