<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/63212>63212</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            MLIR, TOSA: Zero-size tensor crashes tosa-to-tensor
        </td>
    </tr>

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

    <tr>
      <th>Assignees</th>
      <td>
            eric-k256
      </td>
    </tr>

    <tr>
      <th>Reporter</th>
      <td>
          mgehre-amd
      </td>
    </tr>
</table>

<pre>
    ```
func.func @test_reshape_downrank_zero(%arg0: tensor<6x1x0xf32>) -> tensor<6x0xf32> {
  %0 = "tosa.reshape"(%arg0) {new_shape = array<i64: 6, 0>} : (tensor<6x1x0xf32>) -> tensor<6x0xf32>
  return %0 : tensor<6x0xf32>
}
```
run with
`mlir-opt test.mlir --tosa-to-tensor`
crashes in `createReassociationMapsForCollapse` due to https://github.com/llvm/llvm-project/blob/9bccb5ba0ddec929b4cb54825331fcb548b495e3/mlir/lib/Conversion/TosaToTensor/TosaToTensor.cpp#L107
being out of bounds.

I'm not sure how the correct tensor IR would look like for this case.
Tensors where a dimension have zero size seems to be allowed by the TOSA spec.
</pre>
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