From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 7931 invoked by alias); 19 Nov 2004 22:30:47 -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 6161 invoked from network); 19 Nov 2004 22:29:23 -0000 Received: from unknown (HELO mx1.redhat.com) (66.187.233.31) by sourceware.org with SMTP; 19 Nov 2004 22:29:23 -0000 Received: from int-mx1.corp.redhat.com (int-mx1.corp.redhat.com [172.16.52.254]) by mx1.redhat.com (8.12.11/8.12.11) with ESMTP id iAJMTNRb026754; Fri, 19 Nov 2004 17:29:23 -0500 Received: from potter.sfbay.redhat.com (potter.sfbay.redhat.com [172.16.27.15]) by int-mx1.corp.redhat.com (8.11.6/8.11.6) with ESMTP id iAJMTHr28401; Fri, 19 Nov 2004 17:29:17 -0500 Received: from frothingslosh.sfbay.redhat.com (frothingslosh.sfbay.redhat.com [172.16.24.27]) by potter.sfbay.redhat.com (8.12.8/8.12.8) with ESMTP id iAJMTFcv029904; Fri, 19 Nov 2004 17:29:16 -0500 Received: from frothingslosh.sfbay.redhat.com (localhost.localdomain [127.0.0.1]) by frothingslosh.sfbay.redhat.com (8.13.1/8.13.1) with ESMTP id iAJMTF8B028092; Fri, 19 Nov 2004 14:29:15 -0800 Received: (from rth@localhost) by frothingslosh.sfbay.redhat.com (8.13.1/8.13.1/Submit) id iAJMTFeg028091; Fri, 19 Nov 2004 14:29:15 -0800 X-Authentication-Warning: frothingslosh.sfbay.redhat.com: rth set sender to rth@redhat.com using -f Date: Fri, 19 Nov 2004 22:46:00 -0000 From: Richard Henderson To: Eric Botcazou Cc: gcc@gcc.gnu.org Subject: Re: [cft] subreg validation round 2 Message-ID: <20041119222915.GB27917@redhat.com> Mail-Followup-To: Richard Henderson , Eric Botcazou , gcc@gcc.gnu.org References: <20041117184009.GA12257@redhat.com> <200411172021.21297.ebotcazou@libertysurf.fr> <20041119210240.GA18341@redhat.com> <200411192323.54912.ebotcazou@libertysurf.fr> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <200411192323.54912.ebotcazou@libertysurf.fr> User-Agent: Mutt/1.4.1i X-SW-Source: 2004-11/txt/msg00703.txt.bz2 On Fri, Nov 19, 2004 at 11:24:40PM +0100, Eric Botcazou wrote: > Would you see any advantage in manually building the hard regs within the > splitters? No. Indeed, it can hurt, since using gen_lowpart helps arrange for proper debugging information to be generated. I.e. it updates the REG_ATTRS information properly. I'm sure there's lots of backends that could do well to not JUST call gen_rtx_REG (mode, REGNO (x)). Using gen_rtx_REG_offset instead would be much preferred. r~