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[Bug target/56560] [4.6/4.7 regression] vzeroupper clobbers argument with AVX
- From: "hjl.tools at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Mon, 11 Mar 2013 19:34:29 +0000
- Subject: [Bug target/56560] [4.6/4.7 regression] vzeroupper clobbers argument with AVX
- Auto-submitted: auto-generated
- References: <bug-56560-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56560
--- Comment #6 from H.J. Lu <hjl.tools at gmail dot com> 2013-03-11 19:34:29 UTC ---
Created attachment 29645
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=29645
A patch
This patch adds expand_args to track library calls to
expend arguments. We add vzeroupper when expand_args == 1,
which indicates we are expanding the actual function.