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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [Loop unswitch + MemSSA Loop Dep] Assertion "Trying to remove memory access that still has uses"' failed."
href="https://bugs.llvm.org/show_bug.cgi?id=40782">40782</a>
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<th>Summary</th>
<td>[Loop unswitch + MemSSA Loop Dep] Assertion "Trying to remove memory access that still has uses"' failed.
</td>
</tr>
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<th>Product</th>
<td>libraries
</td>
</tr>
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<th>Version</th>
<td>trunk
</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>
</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>Scalar Optimizations
</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
</td>
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<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=21495" name="attach_21495" title="reduced testcase">attachment 21495</a> <a href="attachment.cgi?id=21495&action=edit" title="reduced testcase">[details]</a></span>
reduced testcase
bin/opt -mtriple=systemz-unknown -mcpu=z13 ./tc_rem_stilluses.ll -O3 -S -o
out.opt.ll -enable-mssa-loop-dependency -enable-simple-loop-unswitch
lib/Analysis/MemorySSA.cpp:1714: void
llvm::MemorySSA::removeFromLookups(llvm::MemoryAccess*): Assertion
`MA->use_empty() && "Trying to remove memory access that still has uses"'
failed.</pre>
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