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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Legalization failure for llvm.aarch64.neon.vcvtfp2fxs"
href="https://llvm.org/bugs/show_bug.cgi?id=28877">28877</a>
</td>
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<tr>
<th>Summary</th>
<td>Legalization failure for llvm.aarch64.neon.vcvtfp2fxs
</td>
</tr>
<tr>
<th>Product</th>
<td>new-bugs
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
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<th>OS</th>
<td>Windows NT
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>new bugs
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>pirama@google.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=16894" name="attach_16894" title="Two sources and .sh to reproduce crash">attachment 16894</a> <a href="attachment.cgi?id=16894&action=edit" title="Two sources and .sh to reproduce crash">[details]</a></span>
Two sources and .sh to reproduce crash
ToT fails legalization for two files in Android (one in pdfium and another in
tiff). The error is:
fatal error: error in backend: Do not know how to split this operator's
operand!
In both cases, an llvm.aarch64.neon.vcvtfp2fxs node is involved.
One of the files throws an assert in ReplaceAllUsesWith:
llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp:6308: void
llvm::SelectionDAG::ReplaceAllUsesWith(llvm::SDNode*, llvm:
:SDNode*): Assertion `(!From->hasAnyUseOfValue(i) || From->getValueType(i) ==
To->getValueType(i)) && "Cannot use this version of ReplaceAllUsesWith!"' f
ailed.
Source and .sh files to reproduce crash are attached.</pre>
</div>
</p>
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