<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/145940>145940</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            [HLSL][DirectX][NFC] Move validations from `DXILRootSignature` pass to `Frontend/HLSL/RootSignature`
        </td>
    </tr>

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

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

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

<pre>
    This issue tracks a non-functional change to move all, currently static, validations functions into a common interface in `Fronted/HLSL/RootSignature`.

This will allow the re-use of these verification functions for https://github.com/llvm/llvm-project/issues/129940.

AC:
- [ ] Extend `HLSLRootSignature.[h|cpp]` to provide an interface for the basic validations of root signatures
- [ ] `DXILRootSignature` should be updated to depend on `Frontend/HLSL/RootSignature` and use the validation interface provided there
</pre>
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