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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Block Frequency Analysis Crashes"
href="http://llvm.org/bugs/show_bug.cgi?id=20987">20987</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Block Frequency Analysis Crashes
</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>
<tr>
<th>OS</th>
<td>All
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>Loop Optimizer
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>kfischer@college.harvard.edu
</td>
</tr>
<tr>
<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
</td>
</tr>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
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<div>
<pre>Created <span class=""><a href="attachment.cgi?id=13049" name="attach_13049" title="Reproducer">attachment 13049</a> <a href="attachment.cgi?id=13049&action=edit" title="Reproducer">[details]</a></span>
Reproducer
Running the attached bugpoint-simplified bitcode crashes with:
$ opt block-freq-assert.ll -loop-unroll -loop-vectorize
opt:
/home/kfischer/julia-master/deps/llvm-svn/lib/Analysis/BlockFrequencyInfoImpl.cpp:605:
void findIrreducibleHeaders(const llvm::BlockFrequencyInfoImplBase &, const
llvm::bfi_detail::IrreducibleGraph &, const std::vector<const
IrreducibleGraph::IrrNode *> &, LoopData::NodeList &, LoopData::NodeList &):
Assertion `Headers.size() >= 2 && "Should be irreducible"' failed.</pre>
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