<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/78153>78153</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            reused pch
        </td>
    </tr>

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

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

    <tr>
      <th>Reporter</th>
      <td>
          lw1thirteen
      </td>
    </tr>
</table>

<pre>
    My environment is vscode+clangd, the version of vscode is 1.84.0, and the version of clangd is 17.0.3. When I open a file in vscode, pch file will be produced, and when I close this file, it will be deleted. Could you please let me control whether to close or delete it? And I can reuse the generated pch when I open the same file again. Sometimes when you close vscode directly, the pch file is not deleted, but when you open the same file again, the pch will be generated again, and the previous pch cannot be reused
</pre>
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