From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 9058 invoked by alias); 20 Jan 2012 09:08:47 -0000 Received: (qmail 9047 invoked by uid 22791); 20 Jan 2012 09:08:46 -0000 X-SWARE-Spam-Status: No, hits=-2.9 required=5.0 tests=ALL_TRUSTED,AWL,BAYES_00 X-Spam-Check-By: sourceware.org Received: from localhost (HELO gcc.gnu.org) (127.0.0.1) by sourceware.org (qpsmtpd/0.43rc1) with ESMTP; Fri, 20 Jan 2012 09:07:59 +0000 From: "jakub at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug middle-end/51895] [4.7 Regression] ICE in simplify_subreg Date: Fri, 20 Jan 2012 09:42:00 -0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: middle-end X-Bugzilla-Keywords: ice-on-valid-code X-Bugzilla-Severity: normal X-Bugzilla-Who: jakub at gcc dot gnu.org X-Bugzilla-Status: NEW X-Bugzilla-Priority: P1 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: 4.7.0 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: 2012-01/txt/msg02277.txt.bz2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51895 --- Comment #11 from Jakub Jelinek 2012-01-20 09:07:54 UTC --- (In reply to comment #10) > > I wonder why it does this, instead of just using type S, and if it really has > > to for some reason, why it can't at least make sure it has the same TYPE_MODE. > > Changing a TImode argument to a BLKmode argument doesn't look at least like a > > good optimization. > > I concur, BLKmode means spilling to memory at some point, so this looks like a > clear pessimization to me. Sure, but I believe just that eipa_sra is what is causing this pessimization by doing a bad decision. Anyway, if you prefer one of the other 3 patches (for now?), which one it is? Or some other place to handle it?