From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Mark H Weaver Newsgroups: gmane.lisp.guile.bugs Subject: bug#15533: optimizing away noticeable effects Date: Sat, 05 Oct 2013 16:28:02 -0400 Message-ID: <87ioxba2el.fsf@netris.org> References: <87bo33cybo.fsf@Kagami.home> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: ger.gmane.org 1381004954 29892 80.91.229.3 (5 Oct 2013 20:29:14 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Sat, 5 Oct 2013 20:29:14 +0000 (UTC) Cc: 15533@debbugs.gnu.org To: Ian Price Original-X-From: bug-guile-bounces+guile-bugs=m.gmane.org@gnu.org Sat Oct 05 22:29:16 2013 Return-path: Envelope-to: guile-bugs@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 1VSYTU-0003kd-J2 for guile-bugs@m.gmane.org; Sat, 05 Oct 2013 22:29:16 +0200 Original-Received: from localhost ([::1]:52935 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1VSYTT-0004FJ-UX for guile-bugs@m.gmane.org; Sat, 05 Oct 2013 16:29:15 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:51260) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1VSYTM-0004F9-2U for bug-guile@gnu.org; Sat, 05 Oct 2013 16:29:13 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1VSYTG-0003Jz-8W for bug-guile@gnu.org; Sat, 05 Oct 2013 16:29:08 -0400 Original-Received: from debbugs.gnu.org ([140.186.70.43]:48270) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1VSYTG-0003Ji-5Z for bug-guile@gnu.org; Sat, 05 Oct 2013 16:29:02 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.80) (envelope-from ) id 1VSYTF-0004kS-K4 for bug-guile@gnu.org; Sat, 05 Oct 2013 16:29:01 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Mark H Weaver Original-Sender: "Debbugs-submit" Resent-CC: bug-guile@gnu.org Resent-Date: Sat, 05 Oct 2013 20:29:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 15533 X-GNU-PR-Package: guile X-GNU-PR-Keywords: Original-Received: via spool by 15533-submit@debbugs.gnu.org id=B15533.138100491418208 (code B ref 15533); Sat, 05 Oct 2013 20:29:01 +0000 Original-Received: (at 15533) by debbugs.gnu.org; 5 Oct 2013 20:28:34 +0000 Original-Received: from localhost ([127.0.0.1]:56562 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1VSYSn-0004jc-KD for submit@debbugs.gnu.org; Sat, 05 Oct 2013 16:28:33 -0400 Original-Received: from world.peace.net ([96.39.62.75]:59749) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1VSYSm-0004jU-12 for 15533@debbugs.gnu.org; Sat, 05 Oct 2013 16:28:32 -0400 Original-Received: from 209-6-91-212.c3-0.smr-ubr1.sbo-smr.ma.cable.rcn.com ([209.6.91.212] helo=yeeloong) by world.peace.net with esmtpsa (TLS1.0:DHE_RSA_AES_128_CBC_SHA1:16) (Exim 4.72) (envelope-from ) id 1VSYSf-00014e-Tg; Sat, 05 Oct 2013 16:28:26 -0400 In-Reply-To: <87bo33cybo.fsf@Kagami.home> (Ian Price's message of "Sat, 05 Oct 2013 20:27:55 +0100") User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.3 (gnu/linux) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.15 Precedence: list X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x X-Received-From: 140.186.70.43 X-BeenThere: bug-guile@gnu.org List-Id: "Bug reports for GUILE, GNU's Ubiquitous Extension Language" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-guile-bounces+guile-bugs=m.gmane.org@gnu.org Original-Sender: bug-guile-bounces+guile-bugs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.lisp.guile.bugs:7292 Archived-At: Ian Price writes: > scheme@(guile-user)> ,optimize (define (foo f arg) > (let* ((l '()) > (m (if (pair? arg) > (begin > (set! l (cdr arg)) > (car arg)) > arg))) > (lambda () (apply f m l)))) > $14 = (define (foo f arg) > (let ((m (if (pair? arg) > (begin (begin (cdr arg) (if #f #f)) (car arg)) > arg))) > (lambda () (f m)))) I can confirm that the same thing happens on the stable-2.0 branch. Mark