This is the mail archive of the
systemtap@sourceware.org
mailing list for the systemtap project.
[Bug translator/11590] optimized pre/postfix operators on variable throw away initial variable assignment
- From: "mjw at redhat dot com" <sourceware-bugzilla at sourceware dot org>
- To: systemtap at sources dot redhat dot com
- Date: 12 May 2010 09:44:32 -0000
- Subject: [Bug translator/11590] optimized pre/postfix operators on variable throw away initial variable assignment
- References: <20100512092821.11590.mjw@redhat.com>
- Reply-to: sourceware-bugzilla at sourceware dot org
------- 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 <wenji.huang@oracle.com>
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.