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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - opt -O3 crashes with debug-only=loop-unroll"
href="https://llvm.org/bugs/show_bug.cgi?id=27157">27157</a>
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<th>Summary</th>
<td>opt -O3 crashes with debug-only=loop-unroll
</td>
</tr>
<tr>
<th>Product</th>
<td>libraries
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
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<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
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<th>OS</th>
<td>Linux
</td>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Severity</th>
<td>normal
</td>
</tr>
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<th>Priority</th>
<td>P
</td>
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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>paulsson@linux.vnet.ibm.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org, michael.v.zolotukhin@gmail.com
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=16139" name="attach_16139" title="opt input">attachment 16139</a> <a href="attachment.cgi?id=16139&action=edit" title="opt input">[details]</a></span>
opt input
For the supplied test case, the LoopUnroll pass crashes in DT->verifyDomTree()
if debug output is enabled. This causes the verifyDomTree() function to be
called.
if (DT && !CompletelyUnroll)
DT->recalculate(*L->getHeader()->getParent());
else
DEBUG(DT->verifyDomTree()); <<<<<<<<<<<<<<<<<<
bin/opt ./reg-stack.bc -O3 -mtriple=s390x-linux-gnu -mcpu=z13
-debug-only=loop-unroll</pre>
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