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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [RegisterCoalescer] Assertion `ASubValNo != nullptr' failed."
href="https://bugs.llvm.org/show_bug.cgi?id=40215">40215</a>
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<th>Summary</th>
<td>[RegisterCoalescer] Assertion `ASubValNo != nullptr' 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>
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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>enhancement
</td>
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<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
</td>
</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, quentin.colombet@gmail.com
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<div>
<pre>Created <span class=""><a href="attachment.cgi?id=21290" name="attach_21290" title="reduced test case">attachment 21290</a> <a href="attachment.cgi?id=21290&action=edit" title="reduced test case">[details]</a></span>
reduced test case
bin/llc -mcpu=z13 -O3 -systemz-subreg-liveness tc_asubvalno.ll
lib/CodeGen/RegisterCoalescer.cpp:908: std::pair<bool, bool>
{anonymous}::RegisterCoalescer::removeCopyByCommutingDef(const
llvm::CoalescerPair&, llvm::MachineInstr*): Assertion `ASubValNo != nullptr'
failed.</pre>
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