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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Missed bit pattern"
href="https://bugs.llvm.org/show_bug.cgi?id=38349">38349</a>
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<th>Summary</th>
<td>Missed bit pattern
</td>
</tr>
<tr>
<th>Product</th>
<td>libraries
</td>
</tr>
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<th>Version</th>
<td>trunk
</td>
</tr>
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<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>
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<th>Severity</th>
<td>enhancement
</td>
</tr>
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<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>Scalar Optimizations
</td>
</tr>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>david.bolvansky@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>According to <a href="https://blog.regehr.org/archives/1192">https://blog.regehr.org/archives/1192</a> this pattern occurs often in
SPEC2006
int foo(int x, int y) {
int k = x & 15;
if(k == 0) {
int p = x & 7;
return p == 0; // true
}
return y;
}
Alive proof: <a href="https://rise4fun.com/Alive/OhV">https://rise4fun.com/Alive/OhV</a></pre>
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