<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/101030>101030</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            Downstream `builtin.unrealized_conversion_cast` error following PR #99890, `[MLIR][GPUToNVVM] support fastMath and other non-supported mathOp`
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            mlir
      </td>
    </tr>

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

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

<pre>
    https://github.com/iree-org/iree is a downstream with a `third_party/llvm-project` submodule tracking upstream with daily syncs.

The last sync, https://github.com/iree-org/iree/pull/18019, had to locally revert #99890 to temporarily fix compilation failures.

Details in https://github.com/iree-org/iree/pull/18010#issuecomment-2253215720 and more details in [this Discord chat](https://discord.com/channels/689900678990135345/1266421307285966859).

```
<unknown>:0: error: LLVM Translation failed for operation: builtin.unrealized_conversion_cast
<unknown>:0: note: see current operation: %71 = "builtin.unrealized_conversion_cast"(%70) : (!llvm.array<1 x vector<1xf32>>) -> vector<1x1xf32>
model.mlir:7:10: error: failed to translate the MLIR LLVM dialect to the native llvm::Module
```

@ScottTodd @runseny @joker-eph 
</pre>
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