From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 13826 invoked by alias); 30 Jan 2015 10:10:37 -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 13764 invoked by uid 48); 30 Jan 2015 10:10:30 -0000 From: "jakub at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug debug/64817] [5 Regression] compilation hangs at -O3 with -g enabled on x86_64-linux-gnu Date: Fri, 30 Jan 2015 10:10:00 -0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: debug X-Bugzilla-Version: 5.0 X-Bugzilla-Keywords: 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: 5.0 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: 2015-01/txt/msg03495.txt.bz2 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64817 --- Comment #3 from Jakub Jelinek --- Alex mentioned this is related to PR48866 and it is also related to PR56510. Since the latter, we actually break too complex debug insn expressions into simpler ones (with maximum depth of 4), and it would do its job in this case too, but the problem is that already the simplify_gen_* has the undesirable complexity on the expressions.