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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - opt -memoryssa -loop-deletion -loop-simplifycfg -verify-memoryssa failing with "Memory Def does not dominate it's uses""
href="https://bugs.llvm.org/show_bug.cgi?id=46275">46275</a>
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<th>Summary</th>
<td>opt -memoryssa -loop-deletion -loop-simplifycfg -verify-memoryssa failing with "Memory Def does not dominate it's uses"
</td>
</tr>
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<th>Product</th>
<td>libraries
</td>
</tr>
<tr>
<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
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<th>Priority</th>
<td>P
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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>mikael.holmen@ericsson.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=23600" name="attach_23600" title="bbi-43779.ll reproducer">attachment 23600</a> <a href="attachment.cgi?id=23600&action=edit" title="bbi-43779.ll reproducer">[details]</a></span>
bbi-43779.ll reproducer
Reproduce with:
opt -memoryssa -loop-deletion -loop-simplifycfg -verify-memoryssa -S -o -
bbi-43779.ll
Result:
opt: ../lib/Analysis/MemorySSA.cpp:2013: void
llvm::MemorySSA::verifyOrderingDominationAndDefUses(llvm::Function &) const:
Assertion `dominates(MD, U) && "Memory Def does not dominate it's uses"'
failed.
This starts happening with efb130fc930:
[LoopDeletion] Teach LoopDeletion to preserve MemorySSA if available.
If MemorySSA analysis is analysis, LoopDeletion now preserves it.</pre>
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