Arm backend: Fix helper method for getting input names (#7996)

The previous version missed ConstantInputs which
caused problems in the runtime when the provided
inputs did not match the GraphSignature.

You could argue that having to provide constant inputs
that are already encoded in the graph as arguments is
unnecessary. However, this solution is more general
and does not stop us from adding a pass that prunes
unwanted inputs from the graph signature in the future.
(if that is possible)

Encountered an issue with too long input names,
had to rename some parameters in testcases to
shorter names (added ticket to adress this, #MLETORCH-628)

Signed-off-by: Erik Lundell <[email protected]>

Author: Erik-Lundell

backends/arm/test/ops/test_cat.py

@@ -1,5 +1,5 @@
 # Copyright (c) Meta Platforms, Inc. and affiliates.
-# Copyright 2024 Arm Limited and/or its affiliates.
+# Copyright 2024-2025 Arm Limited and/or its affiliates.
 # All rights reserved.
 #
 # This source code is licensed under the BSD-style license found in the
@@ -33,6 +33,8 @@ class Cat(torch.nn.Module):
                 ),
                 -1,
             ),
+            ((torch.randn(1, 2, 4, 4), torch.randn(1, 2, 4, 1)), 3),
+            ((torch.randn(1, 2, 4, 4), torch.randn(1, 2, 4, 4)), 0),
             ((torch.randn(2, 2, 4, 4), torch.randn(2, 2, 4, 1)), 3),
             (
                 (
@@ -47,8 +49,8 @@ class Cat(torch.nn.Module):
         def __init__(self):
             super().__init__()
 
-        def forward(self, tensors: tuple[torch.Tensor, ...], dim: int) -> torch.Tensor:
-            return torch.cat(tensors, dim=dim)
+        def forward(self, t: tuple[torch.Tensor, ...], dim: int) -> torch.Tensor:
+            return torch.cat(t, dim=dim)
 
     def _test_cat_tosa_MI_pipeline(
         self, module: torch.nn.Module, test_data: Tuple[tuple[torch.Tensor, ...], int]
@@ -134,22 +136,38 @@ def test_cat_tosa_BI(self, operands: tuple[torch.Tensor, ...], dim: int):
         test_data = (operands, dim)
         self._test_cat_tosa_BI_pipeline(self.Cat(), test_data)
 
-    # Mismatch in provided number of inputs and model signature, MLETORCH 519
-    @parameterized.expand(Cat.test_parameters)
+    @parameterized.expand(Cat.test_parameters[:-3])
     @pytest.mark.corstone_fvp
-    @conftest.expectedFailureOnFVP
     def test_cat_u55_BI(self, operands: tuple[torch.Tensor, ...], dim: int):
         test_data = (operands, dim)
         self._test_cat_ethosu_BI_pipeline(
             self.Cat(), common.get_u55_compile_spec(), test_data
         )
 
-    # Mismatch in provided number of inputs and model signature, MLETORCH 519
-    @parameterized.expand(Cat.test_parameters)
+    # MLETORCH-630 Cat does not work on FVP with batch>1
+    @parameterized.expand(Cat.test_parameters[-3:])
     @pytest.mark.corstone_fvp
     @conftest.expectedFailureOnFVP
+    def test_cat_u55_BI_xfails(self, operands: tuple[torch.Tensor, ...], dim: int):
+        test_data = (operands, dim)
+        self._test_cat_ethosu_BI_pipeline(
+            self.Cat(), common.get_u55_compile_spec(), test_data
+        )
+
+    @parameterized.expand(Cat.test_parameters[:-3])
+    @pytest.mark.corstone_fvp
     def test_cat_u85_BI(self, operands: tuple[torch.Tensor, ...], dim: int):
         test_data = (operands, dim)
         self._test_cat_ethosu_BI_pipeline(
             self.Cat(), common.get_u85_compile_spec(), test_data
         )
+
+    # MLETORCH-630 Cat does not work on FVP with batch>1
+    @parameterized.expand(Cat.test_parameters[-3:])
+    @pytest.mark.corstone_fvp
+    @conftest.expectedFailureOnFVP
+    def test_cat_u85_BI_xfails(self, operands: tuple[torch.Tensor, ...], dim: int):
+        test_data = (operands, dim)
+        self._test_cat_ethosu_BI_pipeline(
+            self.Cat(), common.get_u85_compile_spec(), test_data
+        )

backends/arm/test/ops/test_expand.py

@@ -37,15 +37,17 @@ class Expand(torch.nn.Module):
         test_parameters = [
             (torch.rand(1), (2,)),
             (torch.randn(1, 4), (1, -1)),
-            (torch.rand(1, 1, 2, 2), (4, 3, -1, 2)),
             (torch.randn(1), (2, 2, 4)),
-            (torch.rand(3, 2, 4, 1), (-1, -1, -1, 3)),
+            (torch.randn(1, 1, 1, 5), (1, 4, -1, -1)),
             (torch.randn(1, 1, 192), (1, -1, -1)),
+            (torch.randn(1, 1), (1, 2, 2, 4)),
+            (torch.randn(1, 1), (2, 2, 2, 4)),
             (torch.randn(10, 1, 1, 97), (-1, 4, -1, -1)),
+            (torch.rand(1, 1, 2, 2), (4, 3, -1, 2)),
         ]
 
-        def forward(self, x: torch.Tensor, multiples: Sequence):
-            return x.expand(multiples)
+        def forward(self, x: torch.Tensor, m: Sequence):
+            return x.expand(m)
 
     def _test_expand_tosa_MI_pipeline(self, module: torch.nn.Module, test_data: Tuple):
         (
@@ -113,20 +115,34 @@ def test_expand_tosa_MI(self, test_input, multiples):
     def test_expand_tosa_BI(self, test_input, multiples):
         self._test_expand_tosa_BI_pipeline(self.Expand(), (test_input, multiples))
 
-    # Mismatch in provided number of inputs and model signature, MLETORCH 519
-    @parameterized.expand(Expand.test_parameters)
+    @parameterized.expand(Expand.test_parameters[:-3])
     @pytest.mark.corstone_fvp
-    @conftest.expectedFailureOnFVP
     def test_expand_u55_BI(self, test_input, multiples):
         self._test_expand_ethosu_BI_pipeline(
             common.get_u55_compile_spec(), self.Expand(), (test_input, multiples)
         )
 
-    # Mismatch in provided number of inputs and model signature, MLETORCH 519
-    @parameterized.expand(Expand.test_parameters)
+    # MLETORCH-629: Expand does not work on FVP with batch>1
+    @parameterized.expand(Expand.test_parameters[-3:])
     @pytest.mark.corstone_fvp
     @conftest.expectedFailureOnFVP
+    def test_expand_u55_BI_xfails(self, test_input, multiples):
+        self._test_expand_ethosu_BI_pipeline(
+            common.get_u55_compile_spec(), self.Expand(), (test_input, multiples)
+        )
+
+    @parameterized.expand(Expand.test_parameters[:-3])
+    @pytest.mark.corstone_fvp
     def test_expand_u85_BI(self, test_input, multiples):
         self._test_expand_ethosu_BI_pipeline(
             common.get_u85_compile_spec(), self.Expand(), (test_input, multiples)
         )
+
+    # MLETORCH-629: Expand does not work on FVP with batch>1
+    @parameterized.expand(Expand.test_parameters[-3:])
+    @pytest.mark.corstone_fvp
+    @conftest.expectedFailureOnFVP
+    def test_expand_u85_BI_xfails(self, test_input, multiples):
+        self._test_expand_ethosu_BI_pipeline(
+            common.get_u85_compile_spec(), self.Expand(), (test_input, multiples)
+        )

backends/arm/test/ops/test_full.py

@@ -143,20 +143,16 @@ def test_full_tosa_MI(self, test_tensor: Tuple):
     def test_full_tosa_BI(self, test_tensor: Tuple):
         self._test_full_tosa_BI_pipeline(self.AddVariableFull(), test_tensor)
 
-    # Mismatch in provided number of inputs and model signature, MLETORCH 519
     @parameterized.expand(AddVariableFull.test_parameters)
     @pytest.mark.corstone_fvp
-    @conftest.expectedFailureOnFVP
     def test_full_u55_BI(self, test_tensor: Tuple):
         self._test_full_tosa_u55_pipeline(
             self.AddVariableFull(),
             test_tensor,
         )
 
-    # Mismatch in provided number of inputs and model signature, MLETORCH 519
     @parameterized.expand(AddVariableFull.test_parameters)
     @pytest.mark.corstone_fvp
-    @conftest.expectedFailureOnFVP
     def test_full_u85_BI(self, test_tensor: Tuple):
         self._test_full_tosa_u85_pipeline(
             self.AddVariableFull(),

backends/arm/test/runner_utils.py

@@ -65,16 +65,7 @@ def get_input_names(program: ExportedProgram) -> list[str]:
     Returns:
         A list of strings with the names of the model input.
     """
-    input_names = []
-
-    # E.g. bias and weights are 'placeholders' as well. This is used to
-    # get only the use inputs.
-    usr_inputs = program.graph_signature.user_inputs
-    for node in program.graph.nodes:
-        if node.op == "placeholder" and node.name in usr_inputs:
-            input_names.append(node.name)
-
-    return input_names
+    return [spec.arg.name for spec in program.graph_signature.input_specs]
 
 
 def get_input_quantization_params(
@@ -334,13 +325,16 @@ def run_corstone(
 
 
 def prep_data_for_save(
-    data: torch.Tensor,
+    data,
     input_name: str,
     quant_param: Optional[QuantizationParams] = None,
 ):
-    data_np = np.array(data.detach(), order="C").astype(
-        torch_to_numpy_dtype_dict[data.dtype]
-    )
+    if isinstance(data, torch.Tensor):
+        data_np = np.array(data.detach(), order="C").astype(
+            torch_to_numpy_dtype_dict[data.dtype]
+        )
+    else:
+        data_np = np.array(data)
     if quant_param is not None:
         assert quant_param.node_name in input_name, (
             f"The quantization params name '{quant_param.node_name}' does not "