Address comments iree-org#2

Signed-off-by: Harsh Menon <harsh@nod-labs.com>

shark_turbine/kernel/wave/index_sequence_analysis.py

@@ -36,7 +36,12 @@ def has_strided_access(node: fx.Node) -> bool:
         custom = get_custom(node)
         if isinstance(custom, Write) and len(custom.type.symbolic_shape) == 2:
             strides = [simplify_index(custom.index[dim]).stride for dim in custom.index]
-            return sum(1 for stride in strides if stride > 1) == 1
+            num_strided_accesses = sum(1 for stride in strides if stride > 1)
+            if num_strided_accesses > 1:
+                raise NotImplementedError(
+                    "Support for strided accesses on more than one dimension not implemented yet!"
+                )
+            return num_strided_accesses == 1
         return False
 
     strided_operators = trace.walk(has_strided_access)