From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 20444 invoked by alias); 16 Feb 2008 09:34:28 -0000 Received: (qmail 20319 invoked by uid 48); 16 Feb 2008 09:33:44 -0000 Date: Sat, 16 Feb 2008 09:34:00 -0000 Message-ID: <20080216093344.20318.qmail@sourceware.org> X-Bugzilla-Reason: CC References: Subject: [Bug middle-end/35204] [4.3 Regression] crash by too deep recursion in DFS tree-ssa-sccvn.c:1898 In-Reply-To: Reply-To: gcc-bugzilla@gcc.gnu.org To: gcc-bugs@gcc.gnu.org From: "steven at gcc dot gnu dot org" 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: 2008-02/txt/msg01772.txt.bz2 ------- Comment #13 from steven at gcc dot gnu dot org 2008-02-16 09:33 ------- Re. comment #8 You can't terminate the DFS before a complete SCC is found, it will break the correctness of the SCC-VN algorithm. You'd start another DFS from a not-yet-marked SSA name that is in the SCC's DFS subtree, but you won't find the comoplete SCC. I have no idea exactly what would happen, but I'm sure it would be something bad ;-) -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35204