From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Stefan Monnier Newsgroups: gmane.emacs.devel Subject: Re: Floating-point constant folding in Emacs byte compiler Date: Mon, 26 Mar 2018 13:52:33 -0400 Message-ID: References: <2ce39e5c-cd1b-65d6-b125-719caad67932@cs.ucla.edu> <83vadmgfbz.fsf@gnu.org> <87d0zr2n1u.fsf@gmail.com> <83h8p2g99p.fsf@gnu.org> NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: blaine.gmane.org 1522086972 17327 195.159.176.226 (26 Mar 2018 17:56:12 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Mon, 26 Mar 2018 17:56:12 +0000 (UTC) User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.0.50 (gnu/linux) To: emacs-devel@gnu.org Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Mon Mar 26 19:56:08 2018 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1f0WLm-0004Mh-Ie for ged-emacs-devel@m.gmane.org; Mon, 26 Mar 2018 19:56:06 +0200 Original-Received: from localhost ([::1]:58320 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1f0WNq-0002lG-2p for ged-emacs-devel@m.gmane.org; Mon, 26 Mar 2018 13:58:14 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:60909) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1f0WMw-0002jY-VJ for emacs-devel@gnu.org; Mon, 26 Mar 2018 13:57:19 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1f0WMt-0005NQ-VB for emacs-devel@gnu.org; Mon, 26 Mar 2018 13:57:19 -0400 Original-Received: from [195.159.176.226] (port=36784 helo=blaine.gmane.org) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1f0WMt-0005N0-O4 for emacs-devel@gnu.org; Mon, 26 Mar 2018 13:57:15 -0400 Original-Received: from list by blaine.gmane.org with local (Exim 4.84_2) (envelope-from ) id 1f0WKl-0003BU-OD for emacs-devel@gnu.org; Mon, 26 Mar 2018 19:55:03 +0200 X-Injected-Via-Gmane: http://gmane.org/ Original-Lines: 9 Original-X-Complaints-To: usenet@blaine.gmane.org Cancel-Lock: sha1:RhBvhVk5WTGfPV7IlHqtvEII0Co= X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 195.159.176.226 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:224056 Archived-At: >> Hmm, would it be worthwhile to have Emacs signal overflow in such a >> situation (perhaps controlled by a configuration variable) so we could >> fix such issues? I think TRT is for the byte-compiler to refrain from performing this optimization when the result doesn't fit within 30bits. Stefan