Date: Mon, 10 May 1999 19:21:05 +0200 From: Felix von Leitner To: pgcc AT delorie DOT com Subject: Re: Optimization question Message-ID: <19990510192104.C27542@vim.org> Mail-Followup-To: pgcc AT delorie DOT com References: <14135 DOT 5025 DOT 220697 DOT 966833 AT lrz DOT de> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Mailer: Mutt 0.95.5i In-Reply-To: <14135.5025.220697.966833@lrz.de>; from Eugene Leitl on Mon, May 10, 1999 at 10:14:14AM -0700 Reply-To: pgcc AT delorie DOT com X-Mailing-List: pgcc AT delorie DOT com X-Unsubscribes-To: listserv AT delorie DOT com Precedence: bulk Thus spake Eugene Leitl (eugene DOT leitl AT lrz DOT uni-muenchen DOT de): > > good compilers should optimize such expressions by itself, the method is > > called "common subexpression optimization". > Historically, this has never worked very well. Huh? What makes you claim that? It works quite good in commercial compilers for >10 years now, what is your problem with it. gcc uses it successfully, too. Felix