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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Assertion `MSSA->dominates(NewDef, FirstDef) && "Should have dominated the new access"' failed when running GVN"
href="https://bugs.llvm.org/show_bug.cgi?id=51915">51915</a>
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<th>Summary</th>
<td>Assertion `MSSA->dominates(NewDef, FirstDef) && "Should have dominated the new access"' failed when running GVN
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<th>Product</th>
<td>new-bugs
</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
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<th>Status</th>
<td>NEW
</td>
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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>new bugs
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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</tr>
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<th>Reporter</th>
<td>david.stenberg@ericsson.com
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<th>CC</th>
<td>alina.sbirlea@gmail.com, htmldeveloper@gmail.com, llvm-bugs@lists.llvm.org
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<p>
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<pre>Created <span class=""><a href="attachment.cgi?id=25274" name="attach_25274" title="IR reproducer.">attachment 25274</a> <a href="attachment.cgi?id=25274&action=edit" title="IR reproducer.">[details]</a></span>
IR reproducer.
LLVM commit: 15feaaa359c7245bb59ff0a2aa3b806682f44286
$ opt -enable-new-pm=0 -licm -gvn -memcpyopt -S
should-have-dominated-the-new-access.ll
opt: /llvm/lib/Analysis/MemorySSAUpdater.cpp:505: void
llvm::MemorySSAUpdater::fixupDefs(const llvm::SmallVectorImpl<llvm::WeakVH>&):
Assertion `MSSA->dominates(NewDef, FirstDef) && "Should have dominated the new
access"' failed.
I have not been able to reduce this to a single-pass opt invocation, nor
reproduce this with the new pass manager.</pre>
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