<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/138950>138950</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            [flang] Flang goes into infinite loop when compiling gfortran test: strictly-structured-block-1.f90
        </td>
    </tr>

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

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

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

<pre>
    Steps to reproduce:

Assuming that the [LLVM test suite](https://github.com/llvm/llvm-test-suite) is checked out in `./llvm-test-suite`, compile the test as follows
```
$ flang -fopenmp ./llvm-test-suite/Fortran/gfortran/regression/gomp/strictly-structured-block-1.f90
```

Actual behavior: the compiler seems to be in an infinite loop. The memory usage as reported by `top` seems to be insignificant. Compilation did not terminate even after at least 5 minutes on both x86_64 and aarch64. 

Expected behavior: Compilation should terminate successfully. If some OpenMP construct used in the test is not supported yet, flang should crash with a TODO message.
</pre>
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