<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/143764>143764</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            [flang][OpenMP] Failures with Fujitsu 0521_0030 and 0686_0024 (OMP PARALLEL)
        </td>
    </tr>

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

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

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

<pre>
    Test files:
- https://github.com/fujitsu/compiler-test-suite/blob/main/Fortran/0521/0521_0030.f90
- https://github.com/fujitsu/compiler-test-suite/blob/main/Fortran/0686/0686_0024.f90

Sorry, I attempted to bisect this, but ran into LLVM build issues during the bisection that I couldn't get past. Perhaps bisect landed on a patch that just happened to have LLVM build issue, but I wasn't able to get past it.

The failures started around 4-Jun-2025 and both tests started failing with the same build. This LLVM commit is known to work: 54d836a0807c8b1fe11024e3886141dfcbab3880

The first test outputs `err` line, which should not be in the successful output:
```
$ flang -fopenmp 0521_0030.f90 && ./a.out
flang-21: warning: OpenMP support in flang is still experimental [-Wexperimental-option]
 err var i1= 1
 pass
```

The second test currently hangs:
```
$ flang -fopenmp 0686_0024.f90 && ./a.out
flang-21: warning: OpenMP support in flang is still experimental [-Wexperimental-option]
^C
```

At some point I saw it failing as follows:
```
 10011 10011 10011 0
 10011 10011 10011 0
 pass
```
(Only `pass` should be printed upon successful output.)

Compiler version:
```
$ flang --version
flang version 21.0.0git (https://github.com/eugeneepshteyn/llvm-project.git ddef9ce8dad611c2fef172f3b08c5c98235a3b41)
Target: x86_64-unknown-linux-gnu
Thread model: posix
...
```


</pre>
<img width="1" height="1" alt="" src="http://email.email.llvm.org/o/eJzEVc1u4zgTfBr60pBAUj-WDj54JiNgPiRI8G2wewwoqSUxQ5ECf-Lk7ReU7EkyGQR7WSxgWDLJdld1VxeFc3LUiAdSfCHF1U4EPxl7wDCiRlzc5PFF71rTvxzu0XkYpEJHsiOhxwQm75f1B28Ib0bpp9CmnZkJb4bwKL0LhDedmRep0CYenU9ckB4Jb1plWsKbWUhNeNMY662Ib7Tg7Px4oDSj6VDTfy1XWZXnxwOlPD_nIvT4h7H2hfCv8B2E9zgvHnvwBlrpsPPgJ-nibhs8WKFBam_g-vrPG2iDVD1I5wI66IOVegQ_4TlQGg1-Eh6-Q2eC6jXhew8jeliE8yncoZ3E4i5plNA99mA0CFiE76Yt-DE4D5NYFtQbqkk84Yf0F3zf4STclki0CuP5S0KQPt343k8Ig5AqWHTgvLCRr7Am6B7y5H9BJ5zyAoTuoTV-glje14MxMhI9ybg1ITgx44YlhftJug1cZ-ZZepAOfmhz0hHJydgfJDtCkfdVVgpa0X1XtWxAxijPMauqkuWsH7pWtFlV0TdopXV-xQEm-CV4B6SkaC0pKSipV_6nSXYTuCnWGrTx0CJIvUEMXYfODUGd4zdNk5KeP_RIeA6DEnqEZDAL6nmBd7IEwkvCS0gJb0Rqgif0uJ5POIukTsJqqcf4erugvrkDF5bFWB8xbH8sYxGlUoDPC1o5o_ZCASm-JH-9XUnMErVDiitCj4DWwpOwIBnJroDFpUU49yv6rU4OO6P7rVBdsBa1Vy8wCT26f8b47XD8R4xJ8e3rR3ZHD87MCIuROsrciRNI_1OMwsFglDKn3_AERilj774_W_5ddXl1q9VL1Ny6W9KLzFqExUod5yIsRn8UWkp4vTH4enYreELrItvPGpJcDp1LfgkCzlKa0lF6ILz6xCXfWzrhjVJPc7JY84idT2N83-NQd1j1oi8Z6_iAA9vzIWtp1RVdXfGsEFmbs43AvbAjxrGB56p8KPMk6HWuEyV1eE5GHVYJWhQ9zKZHFY8uxslnQo9pmn7s6K4_ZH2d1WKHB7bP67Isiz3dTYeODbxmXYadyLt9We6Lrt-XOVZc1G3X0p08RH-iJWOs4jWv03YoMacs27d1i3WdkZziLKRKI-nU2HG3muSB5dm-zHdKtKjc5Q60h7U0bRgdyamSzrvXOC-9Wm_LtQtRoMWXTeykuILmYqKrFzbbxfRqG6uD_hyp2LDbmzu4O_7_eH397ZrwehesOnzSxAjjl9YR3mz3DeHNmc7Tgf8dAAD__21LdXs">