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[Bug target/56560] [4.6/4.7 regression] vzeroupper clobbers argument with AVX
- From: "ebotcazou at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Thu, 07 Mar 2013 10:17:56 +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 #2 from Eric Botcazou <ebotcazou at gcc dot gnu.org> 2013-03-07 10:17:56 UTC ---
> Confirmed, same code generated on the 4.6 branch. Works on the 4.5 branch
> where no vzeroupper is inserted. Likewise no vzeroupper on trunk.
Thanks for confirming. The vzeroupper pass didn't exist on the 4.5 branch and
has been rewritten to use the mode-switching machinery on mainline.