From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 13477 invoked by alias); 30 Aug 2004 01:04:13 -0000 Mailing-List: contact gcc-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Archive: List-Post: List-Help: Sender: gcc-owner@gcc.gnu.org Received: (qmail 13470 invoked from network); 30 Aug 2004 01:04:12 -0000 Received: from unknown (HELO mail.codesourcery.com) (65.74.133.10) by sourceware.org with SMTP; 30 Aug 2004 01:04:12 -0000 Received: (qmail 2678 invoked from network); 30 Aug 2004 01:04:11 -0000 Received: from localhost (HELO ?192.168.0.105?) (mitchell@127.0.0.1) by mail.codesourcery.com with SMTP; 30 Aug 2004 01:04:11 -0000 Message-ID: <41327D0D.60504@codesourcery.com> Date: Mon, 30 Aug 2004 01:29:00 -0000 From: Mark Mitchell Organization: CodeSourcery, LLC User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7) Gecko/20040616 MIME-Version: 1.0 To: Andrew Pinski CC: Steven Bosscher , gcc@gcc.gnu.org, dberlin@dberlin.org Subject: Re: GCC 3.5 Status (2004-08-29) References: <4132641E.3030206@codesourcery.com> <200408300148.54421.stevenb@suse.de> <41326EBF.9020501@codesourcery.com> <200408300229.13652.stevenb@suse.de> <41327A88.5080903@codesourcery.com> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-SW-Source: 2004-08/txt/msg01433.txt.bz2 Andrew Pinski wrote: > > On Aug 29, 2004, at 5:53 PM, Mark Mitchell wrote: > >> Maintaining compilation speed was a precondition set by the SC for >> the tree-ssa merge. If that condition was not met, then perhaps the >> merge should not have been performed. The fact that it was probably >> indicates that people weren't too worried about these compile-time >> effects. > > > > There has been a couple of cases where compile time has actually speed up > a huge amount even with the new optimization so it was no a clear cut if > we should not merge or not. I am not criticizing the decision to merge. In fact, I am not at all surprised that it is faster sometimes and slower other times: the same is true of the generated code. (There are also some new bugs, and some old bugs fixed, and...) The tree-ssa changes are a huge perturbation and, as such, it's hard to make absolute "it's better" or "it's worse" statements. -- Mark Mitchell CodeSourcery, LLC (916) 791-8304 mark@codesourcery.com