<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/119014>119014</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            [HLSL] Generate Root Signature metadata from AST
        </td>
    </tr>

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

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

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

<pre>
    This issue handles the generation of root signature LLVM IR metadata from the parsed AST.

We will again follow the representation of a list of "root elements" following the defined [metadata representation](https://github.com/llvm/wg-hlsl/blob/main/proposals/0002-root-signature-in-clang.md#metadata-schema).

AC:
- [ ] Define `CGHLSLRuntime::addRootSignature` in `CGRuntime.h`
- [ ] Implement `CGHLSLRuntime::addRootSignature` in `CGRuntime.cpp`
- [ ] Add usage of `addRootSignature` to `emitEntryFunction` in `CGRuntime.cpp`
- [ ] Add tests of generated metadata using `emit-llvm` in `CodeGenHLSL/RootSignatures.hlsl`
</pre>
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