<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/98280>98280</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            Reland D133036 [InstCombine] Treat passing undef to noundef params as UB
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            llvm:instcombine,
            missed-optimization
      </td>
    </tr>

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

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

<pre>
    [D133036](https://reviews.llvm.org/D133036) was reverted by https://github.com/llvm/llvm-project/commit/18de7c6a3b3689bf69215429bde1fb2330a3e69d due to lldb test failures. Would you like to give it a second try?

cc @nikic @aeubanks 

</pre>
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