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<body><span class="vcard"><a class="email" href="mailto:llvm-dev@redking.me.uk" title="Simon Pilgrim <llvm-dev@redking.me.uk>"> <span class="fn">Simon Pilgrim</span></a>
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<a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - [X86] Failure to combine vpmovzxbw with a v16i16->v16i8 truncate implemented with extract+packuswb"
href="https://bugs.llvm.org/show_bug.cgi?id=39637">bug 39637</a>
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<table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>What</th>
<th>Removed</th>
<th>Added</th>
</tr>
<tr>
<td style="text-align:right;">Resolution</td>
<td>---
</td>
<td>FIXED
</td>
</tr>
<tr>
<td style="text-align:right;">Fixed By Commit(s)</td>
<td>
</td>
<td>r354757
</td>
</tr>
<tr>
<td style="text-align:right;">Status</td>
<td>NEW
</td>
<td>RESOLVED
</td>
</tr></table>
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<div>
<b><a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - [X86] Failure to combine vpmovzxbw with a v16i16->v16i8 truncate implemented with extract+packuswb"
href="https://bugs.llvm.org/show_bug.cgi?id=39637#c2">Comment # 2</a>
on <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - [X86] Failure to combine vpmovzxbw with a v16i16->v16i8 truncate implemented with extract+packuswb"
href="https://bugs.llvm.org/show_bug.cgi?id=39637">bug 39637</a>
from <span class="vcard"><a class="email" href="mailto:llvm-dev@redking.me.uk" title="Simon Pilgrim <llvm-dev@redking.me.uk>"> <span class="fn">Simon Pilgrim</span></a>
</span></b>
<pre>Fixed in rL354757
zext(packus(x),packus(y)) -> concat(x,y)
I'm intending to generalize the solution in the future to combine zext with any
shuffle, but until combineX86ShufflesRecursively can handle vector ops of
different sizes this basic pattern is the most stable.</pre>
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