<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/155273>155273</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            [flang] Failure with do_concurrent: redefinition of symbol named 'add_reduction_f64.omp'
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            flang:openmp
      </td>
    </tr>

    <tr>
      <th>Assignees</th>
      <td>
            ergawy
      </td>
    </tr>

    <tr>
      <th>Reporter</th>
      <td>
          vzakhari
      </td>
    </tr>
</table>

<pre>
    The issue appears in 800.pot3d_s with `-fdo-concurrent-to-openmp=host`:
```
flang -c -o pot3d.fppized.o -O1 -fopenmp -fdo-concurrent-to-openmp=host pot3d.fppized.f90
warning: Mapping `do concurrent` to OpenMP is still experimental.
error: loc("pot3d.fppized.f90":6723:7): redefinition of symbol named 'add_reduction_f64.omp'
error: verification of lowering to FIR failed
```

Simple reprorucer:
```
subroutine test1(x,s,N)
  real :: x(N), s
  integer :: N
  do concurrent(i=1:N) reduce(+:s)
     s=s+x(i)
 end do
end subroutine test1
subroutine test2(x,s,N)
  real :: x(N), s
 integer :: N
  do concurrent(i=1:N) reduce(+:s)
     s=s+x(i)
  end do
end subroutine test2
```
</pre>
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