From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED.blaine.gmane.org!not-for-mail From: Paul Eggert Newsgroups: gmane.emacs.devel Subject: Re: Using __builtin_expect (likely/unlikely macros) Date: Sun, 14 Apr 2019 21:41:02 -0700 Organization: UCLA Computer Science Department Message-ID: <6919a4c8-df76-ea1e-34db-1fa62a360e5a@cs.ucla.edu> References: <87a7gst973.fsf@gmail.com> <875zrgt12q.fsf@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Injection-Info: blaine.gmane.org; posting-host="blaine.gmane.org:195.159.176.226"; logging-data="59438"; mail-complaints-to="usenet@blaine.gmane.org" User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.6.1 Cc: emacs-devel@gnu.org To: Alex Gramiak Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Mon Apr 15 06:41:15 2019 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([209.51.188.17]) by blaine.gmane.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:256) (Exim 4.89) (envelope-from ) id 1hFtQg-000FK4-DZ for ged-emacs-devel@m.gmane.org; Mon, 15 Apr 2019 06:41:14 +0200 Original-Received: from localhost ([127.0.0.1]:44584 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1hFtQf-0000Y1-Bd for ged-emacs-devel@m.gmane.org; Mon, 15 Apr 2019 00:41:13 -0400 Original-Received: from eggs.gnu.org ([209.51.188.92]:58073) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1hFtQY-0000XS-Pl for emacs-devel@gnu.org; Mon, 15 Apr 2019 00:41:07 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1hFtQX-0001me-Ta for emacs-devel@gnu.org; Mon, 15 Apr 2019 00:41:06 -0400 Original-Received: from zimbra.cs.ucla.edu ([131.179.128.68]:41348) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1hFtQX-0001mA-MB for emacs-devel@gnu.org; Mon, 15 Apr 2019 00:41:05 -0400 Original-Received: from localhost (localhost [127.0.0.1]) by zimbra.cs.ucla.edu (Postfix) with ESMTP id EFB66161515; Sun, 14 Apr 2019 21:41:03 -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 xTf9yCx6dhR7; Sun, 14 Apr 2019 21:41:03 -0700 (PDT) Original-Received: from localhost (localhost [127.0.0.1]) by zimbra.cs.ucla.edu (Postfix) with ESMTP id 43A11161727; Sun, 14 Apr 2019 21:41:03 -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 9IJBhFXHFEVF; Sun, 14 Apr 2019 21:41:03 -0700 (PDT) Original-Received: from [192.168.1.9] (cpe-23-242-74-103.socal.res.rr.com [23.242.74.103]) by zimbra.cs.ucla.edu (Postfix) with ESMTPSA id 1CD73161718; Sun, 14 Apr 2019 21:41:03 -0700 (PDT) In-Reply-To: <875zrgt12q.fsf@gmail.com> Content-Language: en-US X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x X-Received-From: 131.179.128.68 X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Original-Sender: "Emacs-devel" Xref: news.gmane.org gmane.emacs.devel:235473 Archived-At: Alex Gramiak wrote: > Though I don't think that these macros, used sparingly around code such > as emacs_abort, would make it harder to read/write/maintain. These macro calls would not help near calls to emacs_abort, as it should already be obvious to a careful human reader that the jump to emacs_abort is the road less traveled. (That's also obvious to GCC, since emacs_abort is _Noreturn.)