Update IR for Torch-TensorRT userbenchmark (#1946)
Summary:
- Update IR from `default` to `torch_compile`, to ensure testing is against the desired `torch_compile` backend
Pull Request resolved: https://github.com/pytorch/benchmark/pull/1946
Reviewed By: davidberard98
Differential Revision: D49739908
Pulled By: xuzhao9
fbshipit-source-id: 77b9a6ef2880db8f0b234a552aea27290d559f69
