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Fix optimizer check edge case #3058

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aporialiao
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Summary:
There's an edge case for detecting an optimizer - where no optimizer is applied during backwards, but the compute kernel is fused, so techncially an EBC.optimizer would be created.

In this case for dynamic sharding, we still don't need to store any optimizers - I've added the condition to properly check for optimizers to pass the unit test.

Differential Revision: D76203188

@facebook-github-bot facebook-github-bot added CLA Signed This label is managed by the Facebook bot. Authors need to sign the CLA before a PR can be reviewed. fb-exported labels Jun 7, 2025
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This pull request was exported from Phabricator. Differential Revision: D76203188

Summary:

There's an edge case for detecting an optimizer - where no optimizer is applied during backwards, but the compute kernel is fused, so techncially an EBC.optimizer would be created. 

In this case for dynamic sharding, we still don't need to store any optimizers - I've added the condition to properly check for optimizers to pass the unit test.

Differential Revision: D76203188
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This pull request was exported from Phabricator. Differential Revision: D76203188

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