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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Unsupported ARM Neon intrinsics in Target-specific DAG combine function for VLDDUP"
href="https://bugs.llvm.org/show_bug.cgi?id=38031">38031</a>
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<th>Summary</th>
<td>Unsupported ARM Neon intrinsics in Target-specific DAG combine function for VLDDUP
</td>
</tr>
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<th>Product</th>
<td>tools
</td>
</tr>
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<th>Version</th>
<td>trunk
</td>
</tr>
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<th>Hardware</th>
<td>Other
</td>
</tr>
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<th>OS</th>
<td>Linux
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Keywords</th>
<td>compile-fail, crash-on-invalid
</td>
</tr>
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<th>Severity</th>
<td>normal
</td>
</tr>
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<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>llc
</td>
</tr>
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<th>Assignee</th>
<td>ikosarev@accesssoftek.com
</td>
</tr>
<tr>
<th>Reporter</th>
<td>diogo.sampaio@arm.com
</td>
</tr>
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org, sjoerd.meijer@arm.com
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=20511" name="attach_20511" title="LLVM IR that generates crash-on-invalid">attachment 20511</a> <a href="attachment.cgi?id=20511&action=edit" title="LLVM IR that generates crash-on-invalid">[details]</a></span>
LLVM IR that generates crash-on-invalid
The new VLDDUP operations inserted in <a href="https://reviews.llvm.org/D48439">https://reviews.llvm.org/D48439</a>
are not handled in the target-specific DAG combine function.
ARMISelLowering.cpp::11443 - CombineBaseUpdate
How to reproduce:
llc -debug < problem-9bb6ba.ll
Combining: t637: ch = TokenFactor t635:3, t636:3
Combining: t636: v4i16,v4i16,v4i16,ch = llvm.arm.neon.vld3lane<(load 24 from
%ir.32, align 2)> t634, TargetConstant:i32<1048>, FrameIndex:i32<32>, t635,
t635:1, t635:2, Constant:i32<0>, Constant:i32<2>
Combining: t635: v4i16,v4i16,v4i16,ch = llvm.arm.neon.vld3dup<(load 24 from
%ir.33, align 2)> t634, TargetConstant:i32<1047>, FrameIndex:i32<33>,
Constant:i32<2>
unexpected intrinsic for Neon base update
UNREACHABLE executed at
/work/bf/LLVM/local/src/lib/Target/ARM/ARMISelLowering.cpp:11483!</pre>
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