<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/91640>91640</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            [HLSL] vector subscript indexing
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            HLSL
      </td>
    </tr>

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

    <tr>
      <th>Reporter</th>
      <td>
          llvm-beanz
      </td>
    </tr>
</table>

<pre>
    HLSL vectors allow subscript indexing for individual elements.

## Acceptance Criteria
* Specify the expected behavior for out-of-range subscript access
* Implementation and tests for vector subscript access
</pre>
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