From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 2592 invoked by alias); 24 Oct 2002 23:26:49 -0000 Mailing-List: contact gcc-patches-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Archive: List-Post: List-Help: Sender: gcc-patches-owner@gcc.gnu.org Received: (qmail 2533 invoked from network); 24 Oct 2002 23:26:48 -0000 Received: from unknown (HELO hiauly1.hia.nrc.ca) (132.246.100.193) by sources.redhat.com with SMTP; 24 Oct 2002 23:26:48 -0000 Received: from hiauly1.hia.nrc.ca (localhost [127.0.0.1]) by hiauly1.hia.nrc.ca (8.12.0.Beta16/8.12.0.Beta16) with ESMTP id g9ONQl00027213; Thu, 24 Oct 2002 19:26:47 -0400 (EDT) Received: (from dave@localhost) by hiauly1.hia.nrc.ca (8.12.0.Beta16/8.12.0.Beta16) id g9ONQkob027212; Thu, 24 Oct 2002 19:26:46 -0400 (EDT) Message-Id: <200210242326.g9ONQkob027212@hiauly1.hia.nrc.ca> Subject: Re: Reload patch for PA call rewrite. To: dave@hiauly1.hia.nrc.ca (John David Anglin) Date: Thu, 24 Oct 2002 16:26:00 -0000 From: "John David Anglin" Cc: law@redhat.com, rth@redhat.com, gcc-patches@gcc.gnu.org In-Reply-To: from "John David Anglin" at Oct 24, 2002 05:49:09 pm MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-SW-Source: 2002-10/txt/msg01499.txt.bz2 > I did see a small but consistent improvement in the running time > of genattrtab with sibcalls enabled. I don't know where this arises > but I doubt it is from any saving in the call sequence itself. > There are small differences in how the delay slot is used. For > regular calls, we use a branch and link, and for sibcalls, we just > branch. That's the sum of the differences as I see it. I just rechecked the above. With the only change being the value for FUNCTION_OK_FOR_SIBCALL, the times for genattrtab on an a500 running hppa64-hp-hpux11.11 with the call rewrite were 13.24 seconds with sibcalls and 13.71 seconds without sibcalls, respectively. These numbers are consistent with what I measured using an earlier version of the patch. I think the 3 percent improvement is worthwhile. Dave -- J. David Anglin dave.anglin@nrc.ca National Research Council of Canada (613) 990-0752 (FAX: 952-6605)