<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/123812>123812</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            [HLSL][DirectX] determine intrinsics that need to be backported codegen for older shader models
        </td>
    </tr>

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

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

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

<pre>
    Tickets like `IsHelperLane`  #99233 have  codeGen that varier by shader model to support the use of new HLSL intrinsics with older DXIL versions. 

1. Determine the list of intrinsics that need a backport strategy
2. Determine how many shader models have unique code gen per intrinsic
3. update existing intrinsic tickets to account for special backport codegen requirements.
</pre>
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