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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Question about several ordered directives in the single region"
href="https://bugs.llvm.org/show_bug.cgi?id=47230">47230</a>
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<th>Summary</th>
<td>Question about several ordered directives in the single region
</td>
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<th>Product</th>
<td>OpenMP
</td>
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<th>Version</th>
<td>unspecified
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Windows NT
</td>
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<th>Status</th>
<td>NEW
</td>
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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>Clang Compiler Support
</td>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>yangzh.fnst@cn.fujitsu.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>Follow the Restrictions in OpenMP 5.0, 2.17.9:
During execution of an iteration of a worksharing-loop or a loop nest within a
worksharing-loop, simd, or worksharing-loop SIMD region, a thread must not
execute more than one ordered region corresponding to an ordered construct
without a depend clause.
I think the following case should be ok although several ordered directives in
the single region.
void work(int i) {}
void ordered_good(int n)
{
int i;
#pragma omp for ordered
for (i=0; i<n; i++) {
if (i <= 10) {
#pragma omp ordered
work(i);
}
if (i > 10) {
#pragma omp ordered
work(i+1);
}
}
}
int main() {
ordered_good(100);
return 0;
}</pre>
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