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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Orphaned task reduction should be allowed."
href="https://bugs.llvm.org/show_bug.cgi?id=45117">45117</a>
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<th>Summary</th>
<td>Orphaned task reduction should be allowed.
</td>
</tr>
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<th>Product</th>
<td>OpenMP
</td>
</tr>
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<th>Version</th>
<td>unspecified
</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>
</tr>
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<th>Component</th>
<td>Clang Compiler Support
</td>
</tr>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>andrey.churbanov@intel.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=23205" name="attach_23205" title="Bug reproducer.">attachment 23205</a> <a href="attachment.cgi?id=23205&action=edit" title="Bug reproducer.">[details]</a></span>
Bug reproducer.
OpenMP specification allows task reduction to be orphaned. Issue reported by
Olivier, Stephen Lecler (SNL), and confirmed by other members of OpenMP
language committee.
Blog article link:
<a href="https://developers.redhat.com/blog/2019/03/19/whats-new-in-openmp-5-0/">https://developers.redhat.com/blog/2019/03/19/whats-new-in-openmp-5-0/</a>
To reproduce:
$ clang -fopenmp omp_task_red_orphaned.c
omp_task_red_orphaned.c:14:35: error: in_reduction variable must appear in a
task_reduction clause
#pragma omp task in_reduction(+:r) firstprivate(i, th_gen)
^
omp_task_red_orphaned.c:19:35: error: in_reduction variable must appear in a
task_reduction clause
#pragma omp task in_reduction(+:r) firstprivate(i, th_gen)
^
2 errors generated.
There is also corresponding bug in the runtime library prevented the test to
run to completion, the fix for which posted for review:
<a href="https://reviews.llvm.org/D75673">https://reviews.llvm.org/D75673</a>.</pre>
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