Arm backend: Cast int64 buffers to int32

Cast int64 buffers using get_attr in the same way as
regular placeholders.

Signed-off-by: Adrian Lundell <adrian.lundell@arm.com>
Change-Id: Id3f9acda8f2d21fc582f743b1f59911f11e6c8d7

Author: AdrianLundell

backends/arm/_passes/insert_int32_casts_after_int64_placeholders.py

@@ -89,7 +89,7 @@ def _insert_placeholder_i64_to_i32_casts(self, graph_module: torch.fx.GraphModul
         modified = False
         graph = graph_module.graph
         for node in graph.nodes:
-            if node.op != "placeholder":
+            if node.op not in ("placeholder", "get_attr"):
                 continue
             node_val = node.meta["val"]
             if not self._is_tensor_of_dtype(node_val, torch.int64):

backends/arm/test/ops/test_clamp.py

@@ -257,7 +257,10 @@ def test_clamp_vgf_quant(test_data):
     pipeline.run()
 
 
-aten_op_tensor = "torch.ops.aten.clamp.Tensor"
+aten_op_tensor = [
+    "torch.ops.aten.clamp.Tensor",
+    "torch.ops.dim_order_ops._to_dim_order_copy.default",
+]
 exir_op_tensor = "executorch_exir_dialects_edge__ops_aten_clamp_Tensor"
 
 test_data_suite_tensor_FP = {