From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 9597 invoked by alias); 12 May 2010 09:44:44 -0000 Received: (qmail 9122 invoked by uid 48); 12 May 2010 09:44:32 -0000 Date: Wed, 12 May 2010 15:20:00 -0000 Message-ID: <20100512094432.9117.qmail@sourceware.org> From: "mjw at redhat dot com" To: systemtap@sources.redhat.com In-Reply-To: <20100512092821.11590.mjw@redhat.com> References: <20100512092821.11590.mjw@redhat.com> Reply-To: sourceware-bugzilla@sourceware.org Subject: [Bug translator/11590] optimized pre/postfix operators on variable throw away initial variable assignment X-Bugzilla-Reason: AssignedTo Mailing-List: contact systemtap-help@sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Subscribe: List-Post: List-Help: , Sender: systemtap-owner@sourceware.org X-SW-Source: 2010-q2/txt/msg00318.txt.bz2 ------- Additional Comments From mjw at redhat dot com 2010-05-12 09:44 ------- This seems to have been caused by commit 982b88bd which solved bug #6954. commit 982b88bd950381434a8325e550eff9df59f59dcd Author: Wenji Huang Date: Thu Jan 28 14:16:43 2010 +0800 PR6954: make ++/-- operation trigger automatic global printing * staptree.cxx (varuse_collecting_visitor::visit_arrayindex): Regard operations as pure writes. * testsuite/systemtap.base/global_end.exp: Add test case. * testsuite/systemtap.base/global_end.stp: Ditto. Note comment #3 of that bug: "FWIW, I wonder why we didn't just go this route earlier. I worry that pretending that ++ only writes to its argument may mess up some optimization, I can't think of one right now. We'll keep this special case in mind." Reverting this commit fixes this bug (but obviously introduces bug #6954 again). -- http://sourceware.org/bugzilla/show_bug.cgi?id=11590 ------- You are receiving this mail because: ------- You are the assignee for the bug, or are watching the assignee.