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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - loop vectorizer causes dominance violation"
href="https://llvm.org/bugs/show_bug.cgi?id=30742">30742</a>
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<tr>
<th>Summary</th>
<td>loop vectorizer causes dominance violation
</td>
</tr>
<tr>
<th>Product</th>
<td>new-bugs
</td>
</tr>
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<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>
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<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>new bugs
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>eric.schweitz@pgroup.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=17462" name="attach_17462" title="-loop-vectorize bug">attachment 17462</a> <a href="attachment.cgi?id=17462&action=edit" title="-loop-vectorize bug">[details]</a></span>
-loop-vectorize bug
The attached program shows a failure in opt's loop vectorizer pass. I believe
this failure has been present for several releases, and I have replicated it
with trunk, 3.9, etc.
% opt bug.bc -verify -disable-output
% opt bug.bc -loop-vectorize -disable-output
Instruction does not dominate all uses!
%49 = select i1 %48, i32 1, i32 %47
%43 = add i32 %49, -7
LLVM ERROR: Broken function found, compilation aborted!</pre>
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