From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 23668 invoked by alias); 12 Aug 2010 00:38:52 -0000 Received: (qmail 23546 invoked by uid 48); 12 Aug 2010 00:38:33 -0000 Date: Thu, 12 Aug 2010 00:38:00 -0000 Message-ID: <20100812003833.23545.qmail@sourceware.org> X-Bugzilla-Reason: CC References: Subject: [Bug tree-optimization/45260] [4.5/4.6 Regression] g++4.5: -prefetch-loop-arrays internal compiler error: in verify_expr, at tree-cfg.c:2541 In-Reply-To: Reply-To: gcc-bugzilla@gcc.gnu.org To: gcc-bugs@gcc.gnu.org From: "changpeng dot fang at amd 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: 2010-08/txt/msg00924.txt.bz2 ------- Comment #3 from changpeng dot fang at amd dot com 2010-08-12 00:38 ------- (In reply to comment #2) > It was caused by revision 153878: > > http://gcc.gnu.org/ml/gcc-cvs/2009-11/msg00094.html > I think the same patch was also committed to 4.4 branch. Maybe some prefetch work(s) in 4.5 triggered the bug. > and disappeared with revision 159514: > > http://gcc.gnu.org/ml/gcc-cvs/2010-05/msg00566.html > > I am not if it really fixed the bug. > This could not be a valid fix, because it just disable some prefetches based on performance concern. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45260