<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/106942>106942</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            IR expand: FMINIMUM/FMAXIMUM: Payload is missing if both are NaN
        </td>
    </tr>

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

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

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

<pre>
    In llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp

```
  // Propagate any NaN of both operands
  if (!N->getFlags().hasNoNaNs() &&
 (!DAG.isKnownNeverNaN(RHS) || !DAG.isKnownNeverNaN(LHS))) {
    ConstantFP *FPNaN = ConstantFP::get(*DAG.getContext(),
 APFloat::getNaN(VT.getFltSemantics()));
    MinMax = DAG.getSelect(DL, VT, DAG.getSetCC(DL, CCVT, LHS, RHS, ISD::SETUO),
 DAG.getConstantFP(*FPNaN, DL, VT), MinMax, Flags);
 }
```
</pre>
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