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<body><span class="vcard"><a class="email" href="mailto:nicolasweber@gmx.de" title="Nico Weber <nicolasweber@gmx.de>"> <span class="fn">Nico Weber</span></a>
</span> changed
<a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - clang-cl doesn't support SSSE3"
href="https://bugs.llvm.org/show_bug.cgi?id=20213">bug 20213</a>
<br>
<table border="1" cellspacing="0" cellpadding="8">
<tr>
<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>
</tr>
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<td style="text-align:right;">Resolution</td>
<td>---
</td>
<td>FIXED
</td>
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<td style="text-align:right;">CC</td>
<td>
</td>
<td>nicolasweber@gmx.de
</td>
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<b><a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - clang-cl doesn't support SSSE3"
href="https://bugs.llvm.org/show_bug.cgi?id=20213#c10">Comment # 10</a>
on <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - clang-cl doesn't support SSSE3"
href="https://bugs.llvm.org/show_bug.cgi?id=20213">bug 20213</a>
from <span class="vcard"><a class="email" href="mailto:nicolasweber@gmx.de" title="Nico Weber <nicolasweber@gmx.de>"> <span class="fn">Nico Weber</span></a>
</span></b>
<pre>I think this is as fixed as it's going to get.
clang's model here is different from cl.exe's: You need to tell the compiler
that ssse3 is available (with -mssse3) and then both you and the compiler can
use ssse3 intrinsics. It's on you to only call functions in such TUs. (cl.exe
on the other hand never emits ssse3 instructions itself (maybe unles syou pass
/arch:avx, not sure), and you only need to check before explicit intrin calls.)
(There _is_
<a href="https://llvm.org/devmtg/2014-10/Slides/Christopher-Function%20Multiversioning%20Talk.pdf">https://llvm.org/devmtg/2014-10/Slides/Christopher-Function%20Multiversioning%20Talk.pdf</a>
as of a while ago, so you probably can do this on a per-function basis instead
of on a per-tu basis.)</pre>
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