From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Paul Eggert Newsgroups: gmane.emacs.bugs Subject: bug#23640: 25.1.50; Getting rid of compiler warnings Date: Wed, 8 Jun 2016 00:18:09 -0700 Organization: UCLA Computer Science Department Message-ID: <5757C6B1.5080808@cs.ucla.edu> References: <574E9E50.6040301@cs.ucla.edu> <2b96b91c-cb05-59a5-0458-05239b26da1b@cs.ucla.edu> <57567492.2000009@cs.ucla.edu> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: quoted-printable X-Trace: ger.gmane.org 1465370367 17213 80.91.229.3 (8 Jun 2016 07:19:27 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Wed, 8 Jun 2016 07:19:27 +0000 (UTC) Cc: 23640@debbugs.gnu.org, andrewjmoreton@gmail.com To: rms@gnu.org Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Wed Jun 08 09:19:15 2016 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1bAXlh-0001C3-8S for geb-bug-gnu-emacs@m.gmane.org; Wed, 08 Jun 2016 09:19:13 +0200 Original-Received: from localhost ([::1]:54993 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bAXlg-0003vo-7G for geb-bug-gnu-emacs@m.gmane.org; Wed, 08 Jun 2016 03:19:12 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:54717) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bAXlb-0003vg-A8 for bug-gnu-emacs@gnu.org; Wed, 08 Jun 2016 03:19:08 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1bAXlW-00054G-AJ for bug-gnu-emacs@gnu.org; Wed, 08 Jun 2016 03:19:06 -0400 Original-Received: from debbugs.gnu.org ([208.118.235.43]:47320) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bAXlW-00054C-6q for bug-gnu-emacs@gnu.org; Wed, 08 Jun 2016 03:19:02 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1bAXlV-0005W1-Vs for bug-gnu-emacs@gnu.org; Wed, 08 Jun 2016 03:19:02 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Paul Eggert Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Wed, 08 Jun 2016 07:19:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 23640 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: Original-Received: via spool by 23640-submit@debbugs.gnu.org id=B23640.146537029921152 (code B ref 23640); Wed, 08 Jun 2016 07:19:01 +0000 Original-Received: (at 23640) by debbugs.gnu.org; 8 Jun 2016 07:18:19 +0000 Original-Received: from localhost ([127.0.0.1]:59657 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1bAXkp-0005V5-6L for submit@debbugs.gnu.org; Wed, 08 Jun 2016 03:18:19 -0400 Original-Received: from zimbra.cs.ucla.edu ([131.179.128.68]:35625) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1bAXkn-0005Us-EG for 23640@debbugs.gnu.org; Wed, 08 Jun 2016 03:18:17 -0400 Original-Received: from localhost (localhost [127.0.0.1]) by zimbra.cs.ucla.edu (Postfix) with ESMTP id 470351613CE; Wed, 8 Jun 2016 00:18:10 -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 XDmAfqcJBhYR; Wed, 8 Jun 2016 00:18:09 -0700 (PDT) Original-Received: from localhost (localhost [127.0.0.1]) by zimbra.cs.ucla.edu (Postfix) with ESMTP id 9BAF916142E; Wed, 8 Jun 2016 00:18:09 -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 a1zXWRtzcZku; Wed, 8 Jun 2016 00:18:09 -0700 (PDT) Original-Received: from [192.168.1.9] (unknown [100.32.155.148]) by zimbra.cs.ucla.edu (Postfix) with ESMTPSA id 7DC971613CE; Wed, 8 Jun 2016 00:18:09 -0700 (PDT) User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.8.0 In-Reply-To: X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 208.118.235.43 X-BeenThere: bug-gnu-emacs@gnu.org List-Id: "Bug reports for GNU Emacs, the Swiss army knife of text editors" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Original-Sender: "bug-gnu-emacs" Xref: news.gmane.org gmane.emacs.bugs:119263 Archived-At: Richard Stallman wrote: > I guess so -- but is it a noticeable slowdown? A priori, I doubt it. You're probably right. The major effect these days would be on cache pres= sure,=20 which is tricky to measure. > If it is not significant, why worry about it? > Better to write the code in the clean way. For me it's cleaner to think of UNINIT as an attribute for a declaration,= =20 instead of thinking of UNUSED as a special expression that neither transf= ers=20 control nor has a side effect nor yields a value. It's merely a plus that= UNINIT=20 generates code that is a tiny bit smaller and faster.