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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 - teams construct in implicit parallel has incorrect number of threads/teams"
href="https://bugs.llvm.org/show_bug.cgi?id=47419">47419</a>
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<th>Summary</th>
<td>teams construct in implicit parallel has incorrect number of threads/teams
</td>
</tr>
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<th>Product</th>
<td>OpenMP
</td>
</tr>
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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>Linux
</td>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Severity</th>
<td>normal
</td>
</tr>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>Runtime Library
</td>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>jacob.weightman@hpe.com
</td>
</tr>
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>Consider the following program:
```
#include <omp.h>
#include <stdio.h>
int main(void) {
printf("num_teams = %d\n", omp_get_num_teams());
printf("num_threads = %d\n", omp_get_num_threads());
#pragma omp teams num_teams(4)
{
if(omp_get_team_num() == 0) {
printf("num_teams = %d\n", omp_get_num_teams());
printf("num_threads = %d\n", omp_get_num_threads());
}
printf("team: %d; thread: %d\n",
omp_get_team_num(),
omp_get_thread_num());
}
}
```
At present, Clang prints out (up to the ordering of the print statements):
```
num_teams = 1
num_threads = 1
num_teams = 4
num_threads = 12
team: 0; thread: 0
team: 1; thread: 0
team: 2; thread: 0
team: 3; thread: 0
```
The OpenMP 5.0 spec (section 2.7) states that
<span class="quote">> The teams construct creates a league of initial teams and the initial thread in each team executes the region.</span >
and (section 3.2.2):
<span class="quote">> The omp_get_num_threads routine returns the number of threads in the current team.</span >
The latter print statements indicate that the num_teams clause is respected,
and there is 1 thread per team. Therefore, one should expect that
omp_get_num_threads should return 1 inside of the teams region.</pre>
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