<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/159429>159429</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            [DirectX] Simplify errors from `RootSignatureMetadata.h`
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            backend:DirectX
      </td>
    </tr>

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

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

<pre>
    `RootSignatureMetadata.h` defines a bunch of `ErrorInfo` classes, we likely don't need as much as are currently defined. This task goal is to refactor and remove those error messages into a single or a handful amount of error messages. Previous discussion suggests making it similar to `StringError`, but with more structure.

First suggested here: https://github.com/llvm/llvm-project/pull/153276#discussion_r2356112836
</pre>
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