From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 21912 invoked by alias); 12 Oct 2008 21:18:29 -0000 Received: (qmail 20362 invoked by alias); 12 Oct 2008 21:17:08 -0000 Date: Sun, 12 Oct 2008 21:18:00 -0000 Message-ID: <20081012211708.20361.qmail@sourceware.org> X-Bugzilla-Reason: CC References: Subject: [Bug target/37808] [4.4 Regression]: Revision 141067 breaks Linux/x86 In-Reply-To: Reply-To: gcc-bugzilla@gcc.gnu.org To: gcc-bugs@gcc.gnu.org From: "richard dot guenther at gmail dot com" 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: 2008-10/txt/msg00814.txt.bz2 ------- Comment #9 from richard dot guenther at gmail dot com 2008-10-12 21:17 ------- Subject: Re: [4.4 Regression]: Revision 141067 breaks Linux/x86 On Sun, Oct 12, 2008 at 11:12 PM, Kenneth Zadeck wrote: > andreast at gcc dot gnu dot org wrote: >> ------- Comment #7 from andreast at gcc dot gnu dot org 2008-10-12 20:31 ------- >> I see a failure on sparc-solaris8/10 too. Configury of stage2 fails. >> Applying the mentioned patch cures compilation. >> My sparc config is with multilib. 32-bit/64-bit. >> >> >> > The problem is that the bb is no longer kept in the df-ref, and is > instead extracted from the insn. > This particular problem was caused by insns being deleted in a pass that > defers rescanning but that also changes register numbers. The fix > checks to make sure the insn is still in a basic block before trying to > mark the block as being dirty. Ok. I think it's odd that we keep refs to deleted insns - but that's probably because of the deferred re-scan, right? Thanks, Richard. > 2008-10-12 Kenneth Zadeck > > PR middle-end/37808 > * df-scan.c (df_ref_change_reg_with_loc_1): Added test to make > sure that ref has valid bb. > > Tested by me on both x86-32 and x86-64. Also tested by andreast on > spark-solaris and by keating. > > OK to commit? > > kenny > -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37808