From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 21529 invoked by alias); 23 Mar 2015 17:02:56 -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 21410 invoked by uid 48); 23 Mar 2015 17:02:51 -0000 From: "jakub at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug lto/65515] [5 Regression] FAIL: gcc.c-torture/compile/limits-fndefn.c -O2 -flto -flto-partition=none (ICE) -- SIGSEGV for stack growth failure Date: Mon, 23 Mar 2015 17:38:00 -0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: lto X-Bugzilla-Version: 5.0 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: 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: 2015-03/txt/msg02429.txt.bz2 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65515 --- Comment #4 from Jakub Jelinek --- This is from: 644 else if (TREE_CODE (expr) == FUNCTION_TYPE 645 || TREE_CODE (expr) == METHOD_TYPE) 646 DFS_follow_tree_edge (TYPE_ARG_TYPES (expr)); where TYPE_ARG_TYPES contains a huge TREE_LIST chain (100001 TREE_LIST nodes). >>From quick look at DFS::DFS_write_tree and DFS::DFS_write_tree_body, we don't really have anything there like GTY chain_next, which is clearly highly desirable here. Dunno if order matters here, if not, then for TS_LIST counting number of elements and if it is longer than say 10 or 100, use the vector + DFS_write_node from the end to start, could work.