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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [AMDGPU] *** Couldn't join subrange! whne compiling kernel that use 3 element vectors"
href="https://bugs.llvm.org/show_bug.cgi?id=36679">36679</a>
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<th>Summary</th>
<td>[AMDGPU] *** Couldn't join subrange! whne compiling kernel that use 3 element vectors
</td>
</tr>
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<th>Product</th>
<td>libraries
</td>
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<th>Version</th>
<td>6.0
</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
</td>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>Backend: AMDGPU
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>jan.vesely@rutgers.edu
</td>
</tr>
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
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<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=20030" name="attach_20030" title="lgamma_r.link-1.ll">attachment 20030</a> <a href="attachment.cgi?id=20030&action=edit" title="lgamma_r.link-1.ll">[details]</a></span>
lgamma_r.link-1.ll
(CARRIZO / DRM 3.23.0 / 4.15.6-300.fc27.x86_64, LLVM 6.0.0)
Running OpenCL CTS:
./conformance_bruteforce lgamma_r -3
results in:
*** Couldn't join subrange!
UNREACHABLE executed at
/home/jvesely/llvm/lib/CodeGen/RegisterCoalescer.cpp:2916!
Note that other vector widths do not crash.
Linked .ll file is attached. The crash can be reproduced running:
llc -march=amdgcn -mcpu=carrizo < lgamma_r.link-1.ll</pre>
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