From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 24949 invoked by alias); 29 Oct 2012 17:24:36 -0000 Received: (qmail 24887 invoked by uid 48); 29 Oct 2012 17:24:18 -0000 From: "jakub at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug debug/54402] [4.8 Regression] var-tracking does not scale Date: Mon, 29 Oct 2012 17:24:00 -0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: debug X-Bugzilla-Keywords: compile-time-hog X-Bugzilla-Severity: normal X-Bugzilla-Who: jakub at gcc dot gnu.org X-Bugzilla-Status: ASSIGNED X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: jakub at gcc dot gnu.org X-Bugzilla-Target-Milestone: 4.8.0 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: 2012-10/txt/msg02734.txt.bz2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54402 --- Comment #9 from Jakub Jelinek 2012-10-29 17:24:15 UTC --- Created attachment 28563 --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=28563 gcc48-pr54402-2.patch Just for completeness, I'm attaching my earlier attempt to fix the reflect/check compile time, but unfortunately that only gave speedup from around 49minutes to 19minutes. With the huge number of locs values before gcc48-pr54402.patch the problem was that find_base_term was extremely expensive, and not cached in any way. Once var-tracking finishes initialization, what is find_base_term of some value shouldn't IMHO change.