diff --git a/loopy/preprocess.py b/loopy/preprocess.py
index b3e2496adfcb17e21078d5399e98b449127bb271..622590c7179f077f49acec04ba4f9de1c650f0df 100644
--- a/loopy/preprocess.py
+++ b/loopy/preprocess.py
@@ -2181,6 +2181,10 @@ def preprocess_kernel(kernel, device=None):
 
     kernel = infer_unknown_types(kernel, expect_completion=False)
 
+    # TODO: Specializng based on:
+    # 1. ArgDescriptors
+    # 2. InameTags
+
     check_for_writes_to_predicates(kernel)
     check_reduction_iname_uniqueness(kernel)