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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - InstCombine: assert in canonicalizeCmpWithConstant"
href="https://llvm.org/bugs/show_bug.cgi?id=27786">27786</a>
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<th>Summary</th>
<td>InstCombine: assert in canonicalizeCmpWithConstant
</td>
</tr>
<tr>
<th>Product</th>
<td>tools
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
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<th>Hardware</th>
<td>PC
</td>
</tr>
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<th>OS</th>
<td>Linux
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>opt
</td>
</tr>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>silviu.baranga@arm.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=16377" name="attach_16377" title="Reproduce with: opt -instcombine reproducer.ll -o - -S">attachment 16377</a> <a href="attachment.cgi?id=16377&action=edit" title="Reproduce with: opt -instcombine reproducer.ll -o - -S">[details]</a></span>
Reproduce with: opt -instcombine reproducer.ll -o - -S
Instcombine asserts for the attached reproducer on ToT. This seems to be a
result of the recent changes to canonicalizeCmpWithConstant.
The assert is:
opt: /work/llvm/llvm/include/llvm/Support/Casting.h:95: static bool
llvm::isa_impl_cl<To, const From*>::doit(const From*) [with To =
llvm::UndefValue; From = llvm::Constant]: Assertion `Val && "isa<> used on a
null pointer"' failed.</pre>
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