<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/65965>65965</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            InternalizePass should consider built-in functions.
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            miscompilation,
            llvm:optimizations
      </td>
    </tr>

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

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

<pre>
    We should preserve built-in functions when running `InternalizePass`.

Similar to https://github.com/llvm/llvm-project/blob/39d8e6e22cd192db6ace37a4c842265058dcddb8/llvm/lib/Transforms/IPO/Internalize.cpp#L230-L234 and https://github.com/llvm/llvm-project/blob/7021182d6b43de9488ab70de626192ce70b3a4a6/llvm/lib/Object/IRSymtab.cpp#L48-L57.

Related issue: https://github.com/rust-lang/rust/pull/113923.
</pre>
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