From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 20434 invoked by alias); 14 Dec 2010 13:28:32 -0000 Received: (qmail 20368 invoked by uid 22791); 14 Dec 2010 13:28:31 -0000 X-SWARE-Spam-Status: No, hits=-2.8 required=5.0 tests=ALL_TRUSTED,AWL,BAYES_00,TW_CF X-Spam-Check-By: sourceware.org Received: from localhost (HELO gcc.gnu.org) (127.0.0.1) by sourceware.org (qpsmtpd/0.43rc1) with ESMTP; Tue, 14 Dec 2010 13:28:27 +0000 From: "amonakov at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug rtl-optimization/46649] [4.6 Regression] ICE: in move_bb_info, at sel-sched-ir.c:5080 with -fschedule-insns -fselective-scheduling X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: rtl-optimization X-Bugzilla-Keywords: ice-on-valid-code X-Bugzilla-Severity: normal X-Bugzilla-Who: amonakov at gcc dot gnu.org X-Bugzilla-Status: ASSIGNED X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: amonakov at gcc dot gnu.org X-Bugzilla-Target-Milestone: 4.6.0 X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated Content-Type: text/plain; charset="UTF-8" MIME-Version: 1.0 Date: Tue, 14 Dec 2010 13:28:00 -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 X-SW-Source: 2010-12/txt/msg01580.txt.bz2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46649 --- Comment #6 from Alexander Monakov 2010-12-14 13:28:06 UTC --- Even though it is possible to unbreak purge_empty_blocks/maybe_tidy_empty_bb/sel_merge_blocks for this case, I think it's not worth it given that sel-sched generally expects somewhat clean CFG. So, just cleanup CFG at -O0. I'll submit the following patch in a moment. diff --git a/gcc/sel-sched.c b/gcc/sel-sched.c index 3b5603c..5fe9ccb 100644 --- a/gcc/sel-sched.c +++ b/gcc/sel-sched.c @@ -7648,6 +7648,11 @@ run_selective_scheduling (void) if (n_basic_blocks == NUM_FIXED_BLOCKS) return; + /* Drop empty basic blocks, unreachable code, etc. if the scheduler is + invoked at -O0. */ + if (!optimize) + cleanup_cfg (0); + sel_global_init (); for (rgn = 0; rgn < nr_regions; rgn++)