From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 14874 invoked by alias); 27 Feb 2012 23:16:59 -0000 Received: (qmail 14862 invoked by uid 22791); 27 Feb 2012 23:16:58 -0000 X-SWARE-Spam-Status: No, hits=-2.8 required=5.0 tests=ALL_TRUSTED,AWL,BAYES_00 X-Spam-Check-By: sourceware.org Received: from localhost (HELO gcc.gnu.org) (127.0.0.1) by sourceware.org (qpsmtpd/0.43rc1) with ESMTP; Mon, 27 Feb 2012 23:16:45 +0000 From: "jakub at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug bootstrap/52391] [4.7 regression] genattrtab almost 5X slower for m68k than in 4.6 and earlier releases Date: Mon, 27 Feb 2012 23:35:00 -0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: bootstrap X-Bugzilla-Keywords: build X-Bugzilla-Severity: normal X-Bugzilla-Who: jakub at gcc dot gnu.org X-Bugzilla-Status: NEW X-Bugzilla-Priority: P4 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: 4.7.0 X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated Content-Type: text/plain; charset="UTF-8" MIME-Version: 1.0 Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Id: List-Archive: List-Post: List-Help: Sender: gcc-bugs-owner@gcc.gnu.org X-SW-Source: 2012-02/txt/msg02634.txt.bz2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52391 --- Comment #8 from Jakub Jelinek 2012-02-27 23:16:09 UTC --- Yeah, before that the huge conditions wouldn't be optimized, because the SYMBOL_REFs in them wouldn't rtx_equal_p even when they had the same strings. The question is if the test optimization can be improved, but in any case this doesn't look like a very important regression, it is much more important how fast is the insn-attrtab.c code than how long it takes to generate it. The former is used for all compilations, the latter only once (or 3 times for bootstrap) during gcc build.