verify tvm-ffi cpp wrapper on vector-add.py

Signed-off-by: jinjieliu <jinjie.liu@usc.edu>

python/triton_tvm_ffi/utils.py

@@ -0,0 +1,10 @@
+from typing import Optional
+
+from triton.backends.nvidia.driver import ty_to_cpp
+
+
+def type_canonicalize(ty: str) -> Optional[str]:
+    if ty == "constexpr":
+        return None
+    else:
+        return ty_to_cpp(ty)