From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Andrea Corallo via "Emacs development discussions." Newsgroups: gmane.emacs.devel Subject: Re: feature/native-comp 5bc0855 2/2: Don't treat '=' as simple equality emitting constraints (bug#46812) Date: Tue, 02 Mar 2021 14:30:37 +0000 Message-ID: References: <20210228230215.15472.12941@vcs0.savannah.gnu.org> <20210228230217.1971E20E1B@vcs0.savannah.gnu.org> Reply-To: Andrea Corallo Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="2155"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux) Cc: emacs-devel@gnu.org To: Pip Cet Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Tue Mar 02 15:32:12 2021 Return-path: Envelope-to: ged-emacs-devel@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 1lH64K-0000SE-JN for ged-emacs-devel@m.gmane-mx.org; Tue, 02 Mar 2021 15:32:12 +0100 Original-Received: from localhost ([::1]:43040 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lH64J-0003mg-G2 for ged-emacs-devel@m.gmane-mx.org; Tue, 02 Mar 2021 09:32:11 -0500 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:35788) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lH62u-0002a1-LK for emacs-devel@gnu.org; Tue, 02 Mar 2021 09:30:44 -0500 Original-Received: from mx.sdf.org ([205.166.94.24]:59356) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lH62r-0001Go-Py for emacs-devel@gnu.org; Tue, 02 Mar 2021 09:30:44 -0500 Original-Received: from mab (ma.sdf.org [205.166.94.33]) by mx.sdf.org (8.15.2/8.14.5) with ESMTPS id 122EUbSl018214 (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256 bits) verified NO); Tue, 2 Mar 2021 14:30:38 GMT In-Reply-To: (Pip Cet's message of "Tue, 2 Mar 2021 14:16:24 +0000") Received-SPF: pass client-ip=205.166.94.24; envelope-from=akrl@sdf.org; helo=mx.sdf.org X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.23 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-mx.org@gnu.org Original-Sender: "Emacs-devel" Xref: news.gmane.io gmane.emacs.devel:265831 Archived-At: Pip Cet writes: > On Tue, Mar 2, 2021 at 1:47 PM Andrea Corallo wrote: >> > It's not working either, as far as I can tell: (lambda (x) (and >> > (floatp x) (= x 0) x)) always returns nil when compiled. >> >> Right, I think a better approach is to relax the inputs before >> intersecting them so intersection is not cutting off already constrained >> inputs. > > That should work. > >> 8c7228e8cd for now follows this conservative approach and adds >> some testing for the case. > > Indeed, and it breaks trying to compile (lambda (x) (unless (= x > 1.0e+INF) (error "")) x). (And please don't forget NaNs, they're > numbers too! Except they're not.) Is there a better way to guard against these cases than catching the error around truncate? Andrea