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<div class="moz-cite-prefix">On 12/8/2016 12:05 PM, Jim Lewis wrote:<br>
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<p class="MsoNormal"><span style="font-family:"Times New
Roman"">>> Are you sure there isn't any test
coverage? As far as I can tell, the tests from
<a moz-do-not-send="true"
href="https://reviews.llvm.org/rL133503">https://reviews.llvm.org/rL133503</a>
are still in the tree.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Times New
Roman""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Times New
Roman"">I looked at those, but none of them include the
full pattern that decomposes into bswap and rol. I debugged
through the X86 bswap.ll test and verified none of those
cases make it through MatchBSwapHWord (they get handled in
MatchBSwapHWordLow instead).</span></p>
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<br>
The x86 tests don't, but the ARM tests do: see, for example, test6
in test/CodeGen/ARM/rev.ll. If you compile that for x86, you get
the expected bswap+rol.<br>
<br>
-Eli<br>
<br>
<pre class="moz-signature" cols="72">--
Employee of Qualcomm Innovation Center, Inc.
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, a Linux Foundation Collaborative Project</pre>
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