<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/114081>114081</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            LLVM Windows build fails on `TestPDLLPatterns`
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            new issue
      </td>
    </tr>

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

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

<pre>
    Hi!

I'm trying to build LLVM in a `windows-2022` GitHub Action runner but it fails on:
```
FAILED: tools/mlir/test/lib/Tools/PDLL/TestPDLLPatterns.h.inc
```

Here's a full log: https://gist.github.com/mtsokol/553993820b096cc276e5a82389f1de6d
And here's a job: https://github.com/finch-tensor/Finch-mlir/actions/runs/11575086119/job/32220837863

I'd appreciate any tips on how to debug this issue!
</pre>
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