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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - thread_limit clause on target directive not supported"
href="https://bugs.llvm.org/show_bug.cgi?id=48986">48986</a>
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<th>Summary</th>
<td>thread_limit clause on target directive not supported
</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>
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<th>OS</th>
<td>All
</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>Clang Compiler Support
</td>
</tr>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>tom.deakin@bristol.ac.uk
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>The `thread_limit` clause is not supported on the `target` directive.
This is a valid clause in OpenMP 5.1, but the top of LLVM 12 currently emits
this error:
Code:
#include <stdio.h>
int main(void) {
int A[16];
#pragma omp target thread_limit(16)
#pragma omp teams distribute parallel for
for (int i = 0; i < 16; ++i)
A[i] = i;
printf("A[15]=%d\n", A[15]);
return 0;
}
Compile:
$ clang -O3 -fopenmp -fopenmp-targets=nvptx64-nvidia-cuda -Xopenmp-target
-march=sm_75 omp_target_thread_limit.c
Output:
omp_target_thread_limit.c:7:22: error: unexpected OpenMP clause 'thread_limit'
in directive '#pragma omp target'
#pragma omp target thread_limit(16)
^
1 error generated.</pre>
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