<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/138684>138684</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            [DebugInfo][LICM] Debug value info loss caused by removing dead instructions without salvaging
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            debuginfo
      </td>
    </tr>

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

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

<pre>
    1. Removing the dead instruction without salvaging the debug value info in `hoistAdd`:

https://github.com/llvm/llvm-project/blob/393c783a10052b14d2b76b3ee930b3d83e7f1a16/llvm/lib/Transforms/Scalar/LICM.cpp#L2597

**Code example:** https://godbolt.org/z/TbjdP5Y1d

2. Removing the dead instruction without salvaging the debug value info in `hoistSub`:

https://github.com/llvm/llvm-project/blob/393c783a10052b14d2b76b3ee930b3d83e7f1a16/llvm/lib/Transforms/Scalar/LICM.cpp#L2675

**Code example:** https://godbolt.org/z/h3veE8fj9

3. Removing the dead instruction without salvaging the debug value info in `hoistBOAssociation`:

https://github.com/llvm/llvm-project/blob/393c783a10052b14d2b76b3ee930b3d83e7f1a16/llvm/lib/Transforms/Scalar/LICM.cpp#L2882-L2883

**Code example:** https://godbolt.org/z/9nE7Tob6E
</pre>
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