From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Andrea Corallo Newsgroups: gmane.emacs.devel Subject: Re: Suppressing native compilation (short and long term) Date: Mon, 17 Oct 2022 07:34:02 +0000 Message-ID: References: <87ill8paw7.fsf@trouble.defaultvalue.org> <83o7uzivey.fsf@gnu.org> <3ac9d2b9632f75018327a1bcde0c373f152c404a.camel@gmail.com> <835ygob7ja.fsf@gnu.org> <8335bra2rl.fsf@gnu.org> <87ilkncugg.fsf@gnus.org> <83zgdz7x8u.fsf@gnu.org> <83leph7e4c.fsf@gnu.org> <83y1th5fe7.fsf@gnu.org> Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="36520"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/29.0.50 (gnu/linux) Cc: Eli Zaretskii , Stefan Monnier , Lars Ingebrigtsen , liliana.prikler@gmail.com, rlb@defaultvalue.org, emacs-devel To: Lynn Winebarger Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Mon Oct 17 09:52:05 2022 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 1okKur-0009IU-8o for ged-emacs-devel@m.gmane-mx.org; Mon, 17 Oct 2022 09:52:05 +0200 Original-Received: from localhost ([::1]:33280 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1okKup-0003SY-Uc for ged-emacs-devel@m.gmane-mx.org; Mon, 17 Oct 2022 03:52:04 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:36010) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1okKdS-0008Fn-RW for emacs-devel@gnu.org; Mon, 17 Oct 2022 03:34:06 -0400 Original-Received: from mx.sdf.org ([205.166.94.24]:63397) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1okKdR-0002B1-4s for emacs-devel@gnu.org; Mon, 17 Oct 2022 03:34:06 -0400 Original-Received: from ma.sdf.org (ma.sdf.org [205.166.94.33]) by mx.sdf.org (8.15.2/8.14.5) with ESMTPS id 29H7Y2Z5012633 (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256 bits) verified NO); Mon, 17 Oct 2022 07:34:03 GMT In-Reply-To: (Lynn Winebarger's message of "Sun, 16 Oct 2022 07:55:21 -0400") 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: 2.1.29 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:297934 Archived-At: Lynn Winebarger writes: > On Sat, Oct 15, 2022, 10:29 AM Eli Zaretskii wrote: > > > From: Lynn Winebarger > > Date: Sat, 15 Oct 2022 10:10:23 -0400 > > Cc: Eli Zaretskii , Andrea Corallo , Lars Ingebrigtsen , > > liliana.prikler@gmail.com, rlb@defaultvalue.org, > > emacs-devel > > > > Didn't you, a couple of years ago, suggest generating generic trampolines (per function signature), compile > > those with gccjit, then just use them as needed rather than compiling separate trampolines for every subr? > > Presumably the system would still occasionally need to compile a trampoline for a new signature, but the > > generic trampoline would not be named so it couldn't cause an infinite recursion by being advised before > > being compiled. > > If we want to compile all the trampolines AOT, that is already > possible in Emacs 29, one just needs to actually do it when building > Emacs. > > The question was about whether trampolines could be designed in such a way as to avoid invoking a separate compiler > process without requiring architecture-dependent binary hacking on templates. > I believe I was recalling one of Stefan M's suggestions for just this problem from a couple of years ago. > Also, my understanding from this conversation is that trampolines may be required at run-time that aren't known at > build-time. The list of primitives is known at build time, so is the list of possibly needed trampolines. Andrea