Fix cuda export test failures from #14715 (#14753)

Author: larryliu0820

backends/cuda/TARGETS

@@ -6,6 +6,7 @@ runtime.python_library(
     name = "cuda_backend",
     srcs = [
         "cuda_backend.py",
+        "replace_slice_copy_with_slice.py",
     ],
     visibility = [
         "//executorch/...",

backends/cuda/cuda_backend.py

@@ -144,7 +144,9 @@ def preprocess(
         }
 
         with collect_unsupported_fallback_kernels(), torch.nn.attention.sdpa_kernel(
-            [SDPBackend.MATH]
+            [
+                SDPBackend.MATH  # pyre-ignore[16]: Module `torch.nn.attention` has no attribute `SDPBackend`.
+            ]
         ), torch.no_grad():
             # torch._logging.set_logs(post_grad_graphs=True)
             so_path = torch._inductor.aot_compile(edge_program_module, tuple(user_input_placeholders), options=options)  # type: ignore[arg-type]

backends/cuda/replace_slice_copy_with_slice.py

@@ -6,20 +6,23 @@
 
 # pyre-strict
 
-from typing import Iterable
+from typing import Dict, Iterable, Tuple
 
 import torch
 from executorch.exir.dialects._ops import ops
+from executorch.exir.dialects.edge._ops import EdgeOpOverload
 from executorch.exir.pass_base import ExportPass, PassResult
 from torch import fx
 
 
-_SLICE_COPY_TARGETS = (
+_SLICE_COPY_TARGETS: Tuple[torch._ops.OpOverload | EdgeOpOverload] = (
     torch.ops.aten.slice_copy.Tensor,
     ops.edge.aten.slice_copy.Tensor,
 )
 
-_SLICE_TARGETS = {
+_SLICE_TARGETS: Dict[
+    torch._ops.OpOverload | EdgeOpOverload, torch._ops.OpOverload | EdgeOpOverload
+] = {
     torch.ops.aten.slice_copy.Tensor: torch.ops.aten.slice.Tensor,
     ops.edge.aten.slice_copy.Tensor: ops.edge.aten.slice.Tensor,
 }
@@ -99,8 +102,8 @@ def _is_view_user(self, node: fx.Node, user: fx.Node) -> bool:
         return False
 
     def _argument_mutates(
-        self, schema: torch._C.FunctionSchema, key
-    ) -> bool:  # pyre-ignore[11]
+        self, schema: torch._C.FunctionSchema, key: int | str
+    ) -> bool:
         arguments = schema.arguments
         if isinstance(key, int):
             if key >= len(arguments):

backends/cuda/tests/test_cuda_export.py

@@ -8,6 +8,7 @@
 from typing import Tuple
 
 import torch
+from executorch.backends.cuda.cuda_backend import CudaBackend
 from executorch.backends.cuda.cuda_partitioner import CudaPartitioner
 from executorch.exir import EdgeCompileConfig, to_edge_transform_and_lower
 from torch.export import export
@@ -30,7 +31,9 @@ def _export_to_cuda_with_lower(
         exported_program = export(module, inputs, strict=True)
 
         # Create partitioner and compile specs
-        partitioner = CudaPartitioner([])
+        partitioner = CudaPartitioner(
+            [CudaBackend.generate_method_name_compile_spec("forward")]
+        )
 
         # Use to_edge_transform_and_lower for complete pipeline
         edge_program_manager = to_edge_transform_and_lower(