forward fix for D81697327

backends/vulkan/_passes/remove_redundant_ops.py

@@ -30,6 +30,7 @@ class RemoveRedundantOpsTransform(ExportPass):
         exir_ops.edge.aten.alias.default,
         exir_ops.edge.aten.lift_fresh_copy.default,
         exir_ops.edge.dim_order_ops._to_dim_order_copy.default,
+        exir_ops.edge.dim_order_ops._clone_dim_order.default
     }
 
     def __init__(self) -> None:

backends/vulkan/op_registry.py

@@ -301,6 +301,34 @@ def check_dim_order_copy_node(node: torch.fx.Node) -> bool:
     )
 
 
+@update_features(exir_ops.edge.dim_order_ops._clone_dim_order.default)
+def register_clone_dim_order_op():
+    # Similar to to_dim_order_copy, _clone_dim_order can be removed as long as the
+    # operator is not changing the dtype, i.e. the operator call is modifying the dim
+    # order only. Therefore, check that the input and output dtypes are the same, if so
+    # the operator is safe to remove.
+    def check_clone_dim_order_node(node: torch.fx.Node) -> bool:
+        in_arg = node.args[0]
+        if not isinstance(in_arg, torch.fx.Node):
+            return False
+
+        in_tensor = in_arg.meta.get("val", None)
+        out_tensor = node.meta.get("val", None)
+
+        if in_tensor.dtype != out_tensor.dtype:
+            return False
+
+        return True
+
+    return OpFeatures(
+        inputs_storage=utils.ANY_STORAGE,
+        supports_resize=True,
+        are_node_inputs_supported_fn=check_clone_dim_order_node,
+    )
+
+
+
+
 @update_features(
     [
         exir_ops.edge.aten.bmm.default,

exir/passes/constant_prop_pass.py

@@ -294,8 +294,9 @@ def create_constant_nodes_and_return_specs(
         )
     return name_to_spec_dict
 
-
-def _update_output_node_and_specs(exported_program: ExportedProgram) -> None:
+# add _skip_dim_order to ensure the introduced correct clone node for different dim order schema
+# TODO(gasoonjia): only relying on _clone_dim_order once we remove _skip_dim_order option in the EdgeCompileConfig
+def _update_output_node_and_specs(exported_program: ExportedProgram, _skip_dim_order: bool) -> None:
     """
     Update the output node and output specs in the exported program.
     In case a constant node is used as output, we replace it with a clone of the constant node.
@@ -307,14 +308,16 @@ def _update_output_node_and_specs(exported_program: ExportedProgram) -> None:
     output_specs = exported_program.graph_signature.output_specs
     assert len(output_nodes) == len(output_specs)
 
+    clone_op = exir_ops.edge.aten.clone.default if _skip_dim_order else exir_ops.edge.dim_order_ops._clone_dim_order.default
+
     for i in range(len(output_specs)):
         out_node = output_nodes[i]
         if out_node not in updated_constant_placeholders:
             continue
 
         with exported_program.graph.inserting_after(out_node):
             new_node = exported_program.graph.call_function(
-                exir_ops.edge.aten.clone.default, (out_node,)
+                clone_op, (out_node,)
             )
         assert "val" in out_node.meta
         new_node.meta["val"] = out_node.meta["val"]
@@ -329,6 +332,7 @@ def _update_output_node_and_specs(exported_program: ExportedProgram) -> None:
 def constant_prop_pass(
     exported_program: ExportedProgram,
     custom_skip_targets: Optional[set[EdgeOpOverload]] = None,
+    _skip_dim_order: bool = True,
 ) -> ExportedProgram:
     """
     This pass is for constant propagation for Exported Program with lifted parameters,
@@ -376,7 +380,7 @@ def constant_prop_pass(
         new_input_specs.append(name_to_spec_dict[node.name])
     exported_program.graph_signature.input_specs = new_input_specs
 
-    _update_output_node_and_specs(exported_program)
+    _update_output_node_and_specs(exported_program, _skip_dim_order=_skip_dim_order)
 
     # Cleanup the graph.
     exported_program.graph.eliminate_dead_code()

exir/passes/memory_format_ops_pass.py

@@ -19,9 +19,6 @@
 logger = logging.getLogger(__file__)
 logger.setLevel(logging.INFO)
 
-# TODO - these passes are too specialized on a single to_copy op.
-# We should be able to replace (or revert) any of the dim_order ops in the future.
-
 
 class MemoryFormatOpsPass(ExportPass):
     """
@@ -43,7 +40,7 @@ def call_operator(self, op, args, kwargs, meta):
         # new kwargs with dim_order, and no memory_format for the new op
         nkwargs = dict(copy.deepcopy(kwargs))  # orig kwargs are immutable
 
-        # get the "to" memory format for the EdgeOp
+        # get the target memory format for the EdgeOp
         mem_format = nkwargs.pop("memory_format", torch.contiguous_format)
 
         # can always get the shape, assuming rank is specialized

exir/tests/test_passes.py

@@ -1192,7 +1192,7 @@ def forward(self) -> torch.Tensor:
         )
 
         edge._edge_programs["forward"] = constant_prop_pass(
-            edge.exported_program("forward")
+            edge.exported_program("forward"), _skip_dim_order=False
         )
 
         # Check (c_lifted_tensor_*) nodes are all replaced by _prop_tensor_constant.