From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 17352 invoked by alias); 16 May 2014 08:03:13 -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 17299 invoked by uid 48); 16 May 2014 08:03:09 -0000 From: "jakub at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug rtl-optimization/61094] [4.9/4.10 Regression] -O3 insn Internal compiler error in copyprop_hardreg_forward_1, at regcprop.c:775 Date: Fri, 16 May 2014 08:03:00 -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: 4.9.0 X-Bugzilla-Keywords: X-Bugzilla-Severity: major X-Bugzilla-Who: jakub at gcc dot gnu.org X-Bugzilla-Status: NEW X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: law at redhat dot com X-Bugzilla-Target-Milestone: 4.9.1 X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: 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: 2014-05/txt/msg01431.txt.bz2 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61094 --- Comment #13 from Jakub Jelinek --- I vaguely remember it has been seen in the wild, not sure how often, but there were several bugreports about that. In any case, I'd say it is a pitty to stop optimizing this case for the unlikely case there is no move insn, the needed pending moves should be around and thus can be also verified in the wider mode, the question is if we want to do a linear search for them, or have some faster way to find them.