Migrate in d2go

Summary:
Pull Request resolved: https://github.com/facebookresearch/d2go/pull/678

capture_pre_autograd_graph is deprecating. Migrate to use the new API.

Reviewed By: navsud, tugsbayasgalan

Differential Revision: D63859679

fbshipit-source-id: f14def6bc622cc451020d0edcc312330fa626943

d2go/quantization/modeling.py

@@ -22,7 +22,6 @@ from mobile_cv.arch.quantization.observer import update_stat as observer_update_
 from mobile_cv.arch.utils import fuse_utils
 from mobile_cv.common.misc.iter_utils import recursive_iterate
 from torch import nn
-from torch._export import capture_pre_autograd_graph
 from torch.ao.quantization.quantize_pt2e import (
     convert_pt2e,
     prepare_pt2e,
@@ -32,6 +31,7 @@ from torch.ao.quantization.quantizer.xnnpack_quantizer import (
     get_symmetric_quantization_config,
     XNNPACKQuantizer,
 )
+from torch.export import export_for_training
 
 TORCH_VERSION: Tuple[int, ...] = tuple(int(x) for x in torch.__version__.split(".")[:2])
 # some tests still import prepare/convert from below. So don't remove these.
@@ -39,8 +39,7 @@ if TORCH_VERSION > (1, 10):
     from torch.ao.quantization.quantize import convert
     from torch.ao.quantization.quantize_fx import convert_fx, prepare_fx, prepare_qat_fx
 else:
-    from torch.quantization.quantize import convert
-    from torch.quantization.quantize_fx import convert_fx, prepare_fx, prepare_qat_fx
+    pass
 
 logger = logging.getLogger(__name__)
 
@@ -368,7 +367,7 @@ def prepare_fake_quant_model(cfg, model, is_qat, example_input=None):
             )
         else:
             logger.info("Using default pt2e quantization APIs with XNNPACKQuantizer")
-            captured_model = capture_pre_autograd_graph(model, example_input)
+            captured_model = export_for_training(model, example_input).module()
             quantizer = _get_symmetric_xnnpack_quantizer()
             if is_qat:
                 model = prepare_qat_pt2e(captured_model, quantizer)