From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 52028 invoked by alias); 19 Apr 2019 02:03:03 -0000 Mailing-List: contact gcc-help-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Id: List-Archive: List-Post: List-Help: Sender: gcc-help-owner@gcc.gnu.org Received: (qmail 52019 invoked by uid 89); 19 Apr 2019 02:03:03 -0000 Authentication-Results: sourceware.org; auth=none X-Spam-SWARE-Status: No, score=-0.8 required=5.0 tests=AWL,BAYES_00,FORGED_HOTMAIL_RCVD2,FREEMAIL_FROM,HTML_MESSAGE,KAM_NUMSUBJECT,RCVD_IN_DNSWL_NONE,SPF_HELO_PASS,SPF_PASS autolearn=no version=3.3.1 spammy=UD:*.ii, *.ii, H*c:alternative, H*c:HHH X-HELO: NAM04-CO1-obe.outbound.protection.outlook.com Received: from mail-oln040092010069.outbound.protection.outlook.com (HELO NAM04-CO1-obe.outbound.protection.outlook.com) (40.92.10.69) by sourceware.org (qpsmtpd/0.93/v0.84-503-g423c35a) with ESMTP; Fri, 19 Apr 2019 02:03:02 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=hotmail.com; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=PRMTxbbjuV90QqPnZmres0xVv/RIiGWiUwPrNjU/0Gg=; b=KzqVoscl4k6LCT4a4cFkb8NlPuqwSm0Wl4IAzcQk+/p+XGtQMdAbM3lZ5fHXZse3U+yH4QO6PGKVvl7AuyjP7zQ/5+I7KB9TXDpNI7axVB9EXUABFdOKpHMxJ4qQf1utbp6ntRv6ZKqI2pBeS3k4xOsfEOQHEkldQAAfDXQRa4Nm7dOH16B5cXNlg3UazpIMzrvu87mio7i38+9psRmP1Im2ZxICtl9nUjniC/jp6iov2/dykxFhI+J/BhcbcWFQBxf+9Y8j9LOKIsDlzCgMfzOv3bw9siattpZ9YmUCossXpk/llCIXT4Q6l+lVK/2a+RglH8jwxEruqgd2A7/O+Q== Received: from CO1NAM04FT047.eop-NAM04.prod.protection.outlook.com (10.152.90.60) by CO1NAM04HT198.eop-NAM04.prod.protection.outlook.com (10.152.91.68) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384) id 15.20.1771.16; Fri, 19 Apr 2019 02:03:00 +0000 Received: from BYAPR06MB4710.namprd06.prod.outlook.com (10.152.90.52) by CO1NAM04FT047.mail.protection.outlook.com (10.152.90.126) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384) id 15.20.1771.16 via Frontend Transport; Fri, 19 Apr 2019 02:03:00 +0000 Received: from BYAPR06MB4710.namprd06.prod.outlook.com ([fe80::9434:3c1a:d14d:e06a]) by BYAPR06MB4710.namprd06.prod.outlook.com ([fe80::9434:3c1a:d14d:e06a%3]) with mapi id 15.20.1813.011; Fri, 19 Apr 2019 02:03:00 +0000 From: Jason Mancini To: Jeff Law , Segher Boessenkool CC: Jonathan Wakely , "gcc-help@gcc.gnu.org" Subject: Re: gcc9 snapshot 20190414 is 30x slower than gcc 6.3 Date: Fri, 19 Apr 2019 02:03:00 -0000 Message-ID: References: <20190418190754.GH8599@gate.crashing.org>, In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable X-SW-Source: 2019-04/txt/msg00094.txt.bz2 Working on getting a testcase prepared to file a bug report. The trimmed d= own case shows a 6x degradation instead of 45x at -O0, but hopefully that's= enough to pinpoint the reason. (15 vs 85 seconds.) Seems like some O(n^2= ) behavior, 15s becomes 90s, but 40s becomes 30m. I used "gcc -E" to generate the output. Is that what we're looking for her= e? I'm not familiar with *.ii files (or is that the typical extension used= for preprocessor output?) Thanks!