<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/135346>135346</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            [SystemZ][TTI]Wrong costs for insertelement with even/odd indices
        </td>
    </tr>

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

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

    <tr>
      <th>Reporter</th>
      <td>
          alexey-bataev
      </td>
    </tr>
</table>

<pre>
    Looks like there is bug in SystemZTargetTransformInfo.cpp, SystemZTTIImpl::getVectorInstrCost:

```
if (Val->isIntOrIntVectorTy(BitWidth: 64))
  return ((Index % 2 == 0) ? 1 : 0);
```

It returns cost 1 for insertion into lane 0 and cost 0 for insertion into lane 1, though looks like SystemZTTIImpl::getScalarizationOverhead implements different logic
</pre>
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