<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/97390>97390</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            [RISCV] Node returned by foldBinOpIntoSelectIfProfitable reports error in lowerSELECT
        </td>
    </tr>

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

    <tr>
      <th>Assignees</th>
      <td>
            Yunzezhu94
      </td>
    </tr>

    <tr>
      <th>Reporter</th>
      <td>
          Yunzezhu94
      </td>
    </tr>
</table>

<pre>
    Here is a simple reduced case:
`int a = (a ? 4 : 8) / (8 ? -5141143369814759789L : 0);`
When compiling this case with order 
`clang++  -std=c++11 -march=rv64imafdc -mabi=lp64d -w -O0 -o a.o -c a.cpp`
It reports error: llvm-project/llvm/include/llvm/CodeGen/SelectionDAGNodes.h:960: const llvm::SDValue& llvm::SDNode::getOperand(unsigned int) const: Assertion `Num < NumOperands && "Invalid child # of SDNode!"' failed.

It is because for certain cases foldBinOpIntoSelectIfProfitable may return a constant node when trueVal and falseVal of the select inst have the same value, at this time in following lowerSELECT it reports error that operands cannot be get from a constant node.
</pre>
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