<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=http://email.email.llvm.org/c/eJylk81u2zAMx5_GvhAxHDtOnYMPW7cUA1ZgGPoCtEzbWmUpk6hkeftRzoal6HGAAEGk9OePH-rdcO0eo_dk2Vyz6hF4JiDvnYeFQsCJQNvRY2AfFUdPMCaX0X7DvZnIgg7wM2omCHo5GR1Yq6z-AM4SKLSymyvQohmYfnFEc1MPcNYI2b785rXlIzKaz8kuFrhonl1kQGZUs7ZTglqAHaC9QnDRKwLjFLJ2toCXWRBkoQkOrGNQbjmJrze0Sq0pDRon6xIcnMnrUd9ew7JGIL_mfpm1msX0SiLIIPm4EFYdic0UGGiYUlpBLrgx4d9VIqH3qF7JDqGAJ32W4qTQScYzWoGWNy8oek9kN72oDKmaC7KEs_D89cv3lV2bG9vJOyU9SGRCc3HRDNCTmGkkj3-wZjwTICxOWjPQmYw7iSzaYQVeb93l_raXRT509XCoD5hjlJr7buSrDZRHb7qZ-RSkk1l1lDVJIWNfCJ4cjDn_3TYC-YMUy1GHEEloj0293x3yuRvLh6pqmy0d6rLaP9Q73PbYYEvVtty3vcoN9mRClzUfs6pKlZRwShKRU9Z8yv-fQXdVWckq27KtD01b7Hdt3VCJ-2qoelVjtitpQW2KpFM4P-W-WyX7OAVxpnkO_5wo4zBZohVZCFmzoe5ZBiZ16N203H-TN38q5Ctot1L-Bhc2Ohc>53649</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            Make it possible to test mlir-tblgen error messages
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            mlir:core
      </td>
    </tr>

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

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

<pre>
    Currently, the error message infrastructure for mlir-tblgen is quite simplistic: one can only emit textual errors via `PrintFatalError` without attaching them to any source location. This is also not compatible with the diagnostic verification machinery, which makes it impossible to test edge cases of `mlir-tblgen` backends. Given the importance of TableGen-based formats in MLIR compilation process, it would be preferable to have a more developed and testable diagnostic infrastructure.
</pre>
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