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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - opt -memcpyopt crashing with Assertion `isa<X>(Val) && "cast<Ty>() argument of incompatible type!"' failed."
href="https://bugs.llvm.org/show_bug.cgi?id=48075">48075</a>
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<th>Summary</th>
<td>opt -memcpyopt crashing with Assertion `isa<X>(Val) && "cast<Ty>() argument of incompatible type!"' failed.
</td>
</tr>
<tr>
<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
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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>mikael.holmen@ericsson.com
</td>
</tr>
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org
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<pre>Created <span class=""><a href="attachment.cgi?id=24135" name="attach_24135" title="bbi-48944.ll reproducer">attachment 24135</a> <a href="attachment.cgi?id=24135&action=edit" title="bbi-48944.ll reproducer">[details]</a></span>
bbi-48944.ll reproducer
Reproduce with:
opt -S -o - bbi-48944.ll -memcpyopt
Result:
opt: ../include/llvm/Support/Casting.h:269: typename cast_retty<X, Y
*>::ret_type llvm::cast(Y *) [X = llvm::PointerType, Y = llvm::Type]: Assertion
`isa<X>(Val) && "cast<Ty>() argument of incompatible type!"' failed.
This seems to be rather old, I've reproduced it with saved builds from July
2019.</pre>
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