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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Difference in undef vector simplification"
href="https://bugs.llvm.org/show_bug.cgi?id=41125">41125</a>
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</tr>
<tr>
<th>Summary</th>
<td>Difference in undef vector simplification
</td>
</tr>
<tr>
<th>Product</th>
<td>libraries
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
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<th>OS</th>
<td>Linux
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>enhancement
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>Scalar Optimizations
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>lebedev.ri@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre><a href="https://reviews.llvm.org/D59363#inline-526625">https://reviews.llvm.org/D59363#inline-526625</a>
<a href="https://reviews.llvm.org/D59363#inline-526625">https://reviews.llvm.org/D59363#inline-526625</a>
define <4 x i32> @test_urem_div_undef(<4 x i32> %X) nounwind readnone {
%urem = urem <4 x i32> %X, <i32 5, i32 5, i32 undef, i32 5>
%cmp = icmp eq <4 x i32> %urem, <i32 0, i32 0, i32 0, i32 0>
%ret = zext <4 x i1> %cmp to <4 x i32>
ret <4 x i32> %ret
}
-instsimplify says it's zeroinitializer
but codegen will say it's splat of `1`.</pre>
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