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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>
</span> changed
<a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - Poor use of SIMD reduction"
href="https://bugs.llvm.org/show_bug.cgi?id=44781">bug 44781</a>
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<tr>
<th>What</th>
<th>Removed</th>
<th>Added</th>
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<td style="text-align:right;">Fixed By Commit(s)</td>
<td>
</td>
<td>82de01895455
</td>
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<td style="text-align:right;">Resolution</td>
<td>---
</td>
<td>FIXED
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<td style="text-align:right;">Status</td>
<td>NEW
</td>
<td>RESOLVED
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<b><a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - Poor use of SIMD reduction"
href="https://bugs.llvm.org/show_bug.cgi?id=44781#c4">Comment # 4</a>
on <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - Poor use of SIMD reduction"
href="https://bugs.llvm.org/show_bug.cgi?id=44781">bug 44781</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>(In reply to Simon Pilgrim from <a href="show_bug.cgi?id=44781#c3">comment #3</a>)
<span class="quote">> We can use ptest for this much more efficiently: <a href="https://godbolt.org/z/wDH426">https://godbolt.org/z/wDH426</a>
>
> .LCPI0_0:
> .quad 1095216660735 # 0xff000000ff
> .quad 1095216660735 # 0xff000000ff
> _Z5checkRK3Box: # @_Z5checkRK3Box
> vmovdqu (%rdi), %xmm0
> vptest .LCPI0_0(%rip), %xmm0
> sete %al
> retq</span >
Resolving - we use PTEST since 82de01895455</pre>
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