From: "mjw at redhat dot com" <sourceware-bugzilla@sourceware.org>
To: systemtap@sources.redhat.com
Subject: [Bug translator/11590] optimized pre/postfix operators on variable throw away initial variable assignment
Date: Wed, 12 May 2010 15:20:00 -0000 [thread overview]
Message-ID: <20100512094432.9117.qmail@sourceware.org> (raw)
In-Reply-To: <20100512092821.11590.mjw@redhat.com>
------- 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
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next prev parent reply other threads:[~2010-05-12 9:44 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-05-12 13:08 [Bug translator/11590] New: " mjw at redhat dot com
2010-05-12 15:20 ` mjw at redhat dot com [this message]
2010-05-12 15:24 ` [Bug translator/11590] " mjw at redhat dot com
[not found] <bug-11590-6586@http.sourceware.org/bugzilla/>
2021-10-19 7:05 ` davidjohnn51 at gmail dot com
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