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<body><span class="vcard"><a class="email" href="mailto:michael.liao@intel.com" title="Michael Liao <michael.liao@intel.com>"> <span class="fn">Michael Liao</span></a>
</span> changed
<a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - llc inserts vzeroupper before a call and spoils avx registers, which lives across the call"
href="http://llvm.org/bugs/show_bug.cgi?id=17631">bug 17631</a>
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<th>What</th>
<th>Removed</th>
<th>Added</th>
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<td style="text-align:right;">Status</td>
<td>NEW
</td>
<td>RESOLVED
</td>
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<td style="text-align:right;">CC</td>
<td>
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<td>michael.liao@intel.com
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<td style="text-align:right;">Resolution</td>
<td>---
</td>
<td>FIXED
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<b><a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - llc inserts vzeroupper before a call and spoils avx registers, which lives across the call"
href="http://llvm.org/bugs/show_bug.cgi?id=17631#c1">Comment # 1</a>
on <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - llc inserts vzeroupper before a call and spoils avx registers, which lives across the call"
href="http://llvm.org/bugs/show_bug.cgi?id=17631">bug 17631</a>
from <span class="vcard"><a class="email" href="mailto:michael.liao@intel.com" title="Michael Liao <michael.liao@intel.com>"> <span class="fn">Michael Liao</span></a>
</span></b>
<pre>It's turned out to be an issue specific to Windows where a special helper needs
inserting in function prologue. However, that helper is (and should be) simple,
has minimal registers clobbered and won't use/def XMM/YMM/ZMM registers. The
simple solution is to skip them during 'vzeroupper' insertion.
Fixed in r193261.</pre>
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