<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/124802>124802</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            [AMDGPU] Review intrinsic flags for `int_amdgcn_s_sendmsg`
        </td>
    </tr>

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

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

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

<pre>
    This intrinsic and others in the immediate area are not setting the `IntrNoCallback` flag. Not having this intrinsic prevents `PostOrderFunctionAttrsPass` from marking a function that uses the intrinsic from having the `norecurse` flag applied. Ultimately, that then causes the `amdhsa_uses_dynamic_stack` flag to be set for the kernel.

The use case for this is in our implementation of `print()` for Mojo that uses the intrinsic to build a native `hostcall()` implementation. Fixing the intrinsic to have this flag set fixes the problem locally. Other intrinsics such as `int_amdgcn_s_sleep` do not have the same problem because they derive from `DefaultAttrsIntrinsic`. Other options are likely available in our LLVM pipeline config, but fixing the intrinsic so far has been the easiest path.

cc: @arsenm 
</pre>
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