From nobody Fri Nov 05 20:13:23 2021 X-Original-To: freebsd-current@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id E6B60184F3CE for ; Fri, 5 Nov 2021 20:13:26 +0000 (UTC) (envelope-from sgk@troutmask.apl.washington.edu) Received: from troutmask.apl.washington.edu (troutmask.apl.washington.edu [128.95.76.21]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (2048 bits) client-digest SHA256) (Client CN "troutmask", Issuer "troutmask" (not verified)) by mx1.freebsd.org (Postfix) with ESMTPS id 4HmBXP4nnRz557j; Fri, 5 Nov 2021 20:13:25 +0000 (UTC) (envelope-from sgk@troutmask.apl.washington.edu) Received: from troutmask.apl.washington.edu (localhost [127.0.0.1]) by troutmask.apl.washington.edu (8.16.1/8.16.1) with ESMTPS id 1A5KDNFw026780 (version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384 bits=256 verify=NO); Fri, 5 Nov 2021 13:13:24 -0700 (PDT) (envelope-from sgk@troutmask.apl.washington.edu) Received: (from sgk@localhost) by troutmask.apl.washington.edu (8.16.1/8.16.1/Submit) id 1A5KDNrM026779; Fri, 5 Nov 2021 13:13:23 -0700 (PDT) (envelope-from sgk) Date: Fri, 5 Nov 2021 13:13:23 -0700 From: Steve Kargl To: freebsd-current@freebsd.org, lwhsu@freebsd.org, dim@freebsd.org Subject: WHY? commit ac76bc1145dd7f4476e5d982ce8f355f71015713 Message-ID: <20211105201323.GA26765@troutmask.apl.washington.edu> List-Id: Discussions about the use of FreeBSD-current List-Archive: https://lists.freebsd.org/archives/freebsd-current List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-current@freebsd.org MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline X-Rspamd-Queue-Id: 4HmBXP4nnRz557j X-Spamd-Bar: - Authentication-Results: mx1.freebsd.org; dkim=none; dmarc=fail reason="No valid SPF, No valid DKIM" header.from=washington.edu (policy=none); spf=none (mx1.freebsd.org: domain of sgk@troutmask.apl.washington.edu has no SPF policy when checking 128.95.76.21) smtp.mailfrom=sgk@troutmask.apl.washington.edu X-Spamd-Result: default: False [-1.92 / 15.00]; RCVD_TLS_ALL(0.00)[]; ARC_NA(0.00)[]; MID_RHS_MATCH_FROM(0.00)[]; FROM_HAS_DN(0.00)[]; RCPT_COUNT_THREE(0.00)[3]; TO_MATCH_ENVRCPT_ALL(0.00)[]; NEURAL_HAM_LONG(-1.00)[-1.000]; MIME_GOOD(-0.10)[text/plain]; TO_DN_NONE(0.00)[]; NEURAL_SPAM_MEDIUM(0.08)[0.083]; NEURAL_HAM_SHORT(-1.00)[-1.000]; R_SPF_NA(0.00)[no SPF record]; FROM_EQ_ENVFROM(0.00)[]; R_DKIM_NA(0.00)[]; MIME_TRACE(0.00)[0:+]; ASN(0.00)[asn:73, ipnet:128.95.0.0/16, country:US]; RCVD_COUNT_TWO(0.00)[2]; SUBJECT_HAS_QUESTION(0.00)[]; DMARC_POLICY_SOFTFAIL(0.10)[washington.edu : No valid SPF, No valid DKIM,none] X-ThisMailContainsUnwantedMimeParts: N Why was this committed? commit ac76bc1145dd7f4476e5d982ce8f355f71015713 Author: Dimitry Andric Date: Tue Feb 9 22:06:51 2021 +0100 Fix lib/msun's ctrig_test/test_inf_inputs test case with clang >= 10 This sprinkles a few strategic volatiles in an attempt to defeat clang's optimization interfering with the expected floating-point exception flags. There is nothing, and I mean, nothing strategic about "sprinkling" volatile onto the declaration of "float x, y, h;" These variables are referenced in all floating pointing operations in the file, which means that there are needless reloading of x, y, and h from memory. -- Steve