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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Assertion `Headers.size() >= 2 && "Expected irreducible CFG; -loop-info is likely invalid"' failed."
href="https://llvm.org/bugs/show_bug.cgi?id=28888">28888</a>
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<th>Summary</th>
<td>Assertion `Headers.size() >= 2 && "Expected irreducible CFG; -loop-info is likely invalid"' failed.
</td>
</tr>
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<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>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
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<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>Core LLVM classes
</td>
</tr>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>chisophugis@gmail.com
</td>
</tr>
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<th>CC</th>
<td>dberlin@dberlin.org, llvm-bugs@lists.llvm.org, michael.v.zolotukhin@gmail.com
</td>
</tr>
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<th>Blocks</th>
<td>28315
</td>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=16905" name="attach_16905" title="Failing test case.">attachment 16905</a> <a href="attachment.cgi?id=16905&action=edit" title="Failing test case.">[details]</a></span>
Failing test case.
Stacktrace here: <a href="https://reviews.llvm.org/P7179">https://reviews.llvm.org/P7179</a>
opt
'-passes=require<targetir>,require<assumptions>,require<scalar-evolution>,require<opt-remark-emit>,loop(unroll),require<block-freq>'
-disable-output $1
(
Does not reproduce with old PM (loop-vectorize was the thing that used
block-freq):
opt -loop-unroll -loop-vectorize -disable-output $1
)
The test case is still quite large, but it seems like the best that bugpoint
can currently do. DannyB, this might be a useful test case for any new magic in
bugpoint.
Michael Z., if you have a moment, could you look at this?</pre>
</div>
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