From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 27369 invoked by alias); 16 May 2013 08:16:04 -0000 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 Received: (qmail 27310 invoked by uid 48); 16 May 2013 08:16:00 -0000 From: "jakub at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug rtl-optimization/57300] [4.8/4.9 Regression] statement in expression miscompiled at -O3 in 32-bit mode Date: Thu, 16 May 2013 08:16:00 -0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: rtl-optimization X-Bugzilla-Version: 4.8.1 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: jakub at gcc dot gnu.org X-Bugzilla-Status: UNCONFIRMED X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: 4.8.1 X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: cc Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-SW-Source: 2013-05/txt/msg01083.txt.bz2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57300 Jakub Jelinek changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |ebotcazou at gcc dot gnu.org, | |krebbel at gcc dot gnu.org, | |steven at gcc dot gnu.org --- Comment #3 from Jakub Jelinek --- I'm worried if this isn't too expensive, as there are just 3 dead_or_set_p uses in define_split patterns in the compiler apparently, one in i386.md (the one hitting in this and the other PR), guarded with reload_completed, and two for movdi splitters in s390.md (not guarded by that). If the s390.md splitters could be guarded by reload_completed, we could at least avoid the df_analyze in split1 pass.