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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Failure to scalarize comparison of unform-op(broadcast) vs broadcast"
href="https://bugs.llvm.org/show_bug.cgi?id=37463">37463</a>
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<th>Summary</th>
<td>Failure to scalarize comparison of unform-op(broadcast) vs broadcast
</td>
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<th>Product</th>
<td>libraries
</td>
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<th>Version</th>
<td>trunk
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Linux
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>enhancement
</td>
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>Scalar Optimizations
</td>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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</tr>
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<th>Reporter</th>
<td>listmail@philipreames.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
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<p>
<div>
<pre>In the example below, we should be able to replace the sequence with a
broadcast of a scalar comparison:
%52 = insertelement <4 x i64*> undef, i64* %51, i32 0
%53 = shufflevector <4 x i64*> %52, <4 x i64*> undef, <4 x i32>
zeroinitializer
%54 = lshr <4 x i64> %33, <i64 21, i64 21, i64 21, i64 21>
%55 = insertelement <4 x i64> undef, i64 %35, i32 0
%56 = shufflevector <4 x i64> %55, <4 x i64> undef, <4 x i32> zeroinitializer
%57 = icmp eq <4 x i64> %56, %54
Even if we don't get to the scalar form, we definitely should be sinking the
lsr to be a scalar computation before the broadcast given both arguments are
broadcasts of scalars.</pre>
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</p>
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