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<base href="https://bugs.llvm.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [OpenMP 5.0] Undefined reference error with task reduction in target region"
href="https://bugs.llvm.org/show_bug.cgi?id=49150">49150</a>
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<th>Summary</th>
<td>[OpenMP 5.0] Undefined reference error with task reduction in target region
</td>
</tr>
<tr>
<th>Product</th>
<td>OpenMP
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<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>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>Runtime Library
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>jhdavis@udel.edu
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
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<div>
<pre>Created <span class=""><a href="attachment.cgi?id=24516" name="attach_24516" title="Source of reproducer for the OpenMP task reduction on target bug.">attachment 24516</a> <a href="attachment.cgi?id=24516&action=edit" title="Source of reproducer for the OpenMP task reduction on target bug.">[details]</a></span>
Source of reproducer for the OpenMP task reduction on target bug.
Overview: Clang 12 crashes at compile with undefined reference errors for a
program using a target parallel construct with reduction(task...) and a task
clause with in_reduction within.
Steps to reproduce:
1. Compile attached reproducer with `clang -lm -fopenmp
-fopenmp-targets=nvptx64-nvidia-cuda task_reduction_device_bug.c`
Actual results:
`nvlink error : Undefined reference to '__kmpc_taskred_modifier_init' in
'/tmp/task_reduction_device_bug-fd3d8f.cubin'
nvlink error : Undefined reference to '__kmpc_task_reduction_modifier_fini'
in '/tmp/task_reduction_device_bug-fd3d8f.cubin'
nvlink error : Undefined reference to '__kmpc_task_reduction_get_th_data' in
'/tmp/task_reduction_device_bug-fd3d8f.cubin'
clang-12: error: nvlink command failed with exit code 255 (use -v to see
invocation)
clang version 12.0.0 (<a href="https://github.com/llvm/llvm-project.git">https://github.com/llvm/llvm-project.git</a>
d36812892c16b551f058774babbc8727737f80cd)
Target: powerpc64le-unknown-linux-gnu
Thread model: posix
InstalledDir: /sw/summit/ums/stf010/llvm/12.0.0-20210125/bin
clang-12: note: diagnostic msg: Error generating preprocessed source(s).`
Expected results:
Successful compilation.
Build & Hardware:
clang version 12.0.0 (<a href="https://github.com/llvm/llvm-project.git">https://github.com/llvm/llvm-project.git</a>
d36812892c16b551f058774babbc8727737f80cd)
Target: powerpc64le-unknown-linux-gnu
Thread model: posix
InstalledDir: /sw/summit/ums/stf010/llvm/12.0.0-20210125/bin
Additional information:
Reproducer source attached.</pre>
</div>
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