Add Arm conformer unit test

Change-Id: Ic0aefae51312c533acc761d38437f4d79408a940
Signed-off-by: Fredrik Knutsson <[email protected]>

Author: freddan80

backends/arm/test/models/test_conformer.py

@@ -0,0 +1,49 @@
+# Copyright 2024 Arm Limited and/or its affiliates.
+# All rights reserved.
+#
+# This source code is licensed under the BSD-style license found in the
+# LICENSE file in the root directory of this source tree.
+
+
+import torch
+from executorch.backends.arm.test import common
+
+from executorch.backends.arm.test.tester.arm_tester import ArmTester
+from executorch.exir import EdgeCompileConfig
+
+from torchaudio.models import Conformer
+
+
+dim = 16
+lengths = torch.randint(1, 100, (10,), dtype=torch.int32)
+input_data = torch.rand(10, int(lengths.max()), dim)
+
+conformer = Conformer(
+    input_dim=dim,
+    num_heads=4,
+    ffn_dim=64,
+    num_layers=2,
+    depthwise_conv_kernel_size=31,
+)
+conformer = conformer.eval()
+
+_edge_compile_config: EdgeCompileConfig = EdgeCompileConfig(
+    _skip_dim_order=True,  # TODO(T182928844): Delegate dim order op to backend.
+)
+
+
+def test_conformer_tosa_MI():
+    (
+        ArmTester(
+            conformer,
+            example_inputs=(input_data, lengths),
+            compile_spec=common.get_tosa_compile_spec(tosa_version="TOSA-0.80+MI"),
+        )
+        .export()
+        .dump_operator_distribution("ta_conformer_ops_export.txt")
+        .to_edge()  # todo: .to_edge_transform_and_lower(edge_compile_config=_edge_compile_config)
+        .dump_operator_distribution("ta_conformer_ops_toedge.txt")
+        # .to_executorch()
+        # .run_method_and_compare_outputs(inputs=(input_data, lengths))
+        # .serialize(PATH)
+    )