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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - coalescer crash"
href="https://bugs.llvm.org/show_bug.cgi?id=34280">34280</a>
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<th>Summary</th>
<td>coalescer crash
</td>
</tr>
<tr>
<th>Product</th>
<td>libraries
</td>
</tr>
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<th>Version</th>
<td>3.9
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Linux
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>enhancement
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>Register Allocator
</td>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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</tr>
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<th>Reporter</th>
<td>paulsson@linux.vnet.ibm.com
</td>
</tr>
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=19027" name="attach_19027" title="reduced testcase">attachment 19027</a> <a href="attachment.cgi?id=19027&action=edit" title="reduced testcase">[details]</a></span>
reduced testcase
This is a test case that crashes with seg fault during reg-coalescing. It was
discovered a while back ago and can unfortunately not be reproduced on trunk.
Looking at the logs of the RegisterCoalescer, I suspect the bud may very
well just be hidden now, since I don't see any bugfix for it.
Please check out 4b01366 (r307747) and build llc, and run with:
llc -mtriple=s390x-linux-gnu -mcpu=z13 -O3 -pre-RA-sched=source
./tc_coalescercrash.ll</pre>
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