From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 27320 invoked by alias); 20 Dec 2013 22:27:34 -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 27237 invoked by uid 48); 20 Dec 2013 22:27:29 -0000 From: "law at redhat dot com" To: gcc-bugs@gcc.gnu.org Subject: [Bug middle-end/57904] [4.9 Regression] Bogus(?) "invokes undefined behavior" warning with Fortran's finalization wrapper (gfortran.dg/class_48.f90) Date: Fri, 20 Dec 2013 22:27:00 -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-Version: 4.9.0 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: law at redhat dot com X-Bugzilla-Status: NEW X-Bugzilla-Priority: P1 X-Bugzilla-Assigned-To: law at redhat dot com X-Bugzilla-Target-Milestone: 4.9.0 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: 2013-12/txt/msg01968.txt.bz2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57904 --- Comment #17 from Jeffrey A. Law --- Dominique, thanks for verifying that 58746 is a duplicate. I was wondering about that. Richi, we've known for a long time (since the early 90s) that running CSE soon after loop unrolling is profitable. Soooo, why not run conditionally run DOM after unrolling? That wouldn't create a compile-time hit for a typical -O2 compilation.