+
+-- Is the given binder defined by the user?
+isUserDefined :: CoreSyn.CoreBndr -> Bool
+-- System names are certain to not be user defined
+isUserDefined bndr | Name.isSystemName (Id.idName bndr) = False
+-- Builtin functions are usually not user-defined either (and would
+-- break currently if they are...)
+isUserDefined bndr = str `notElem` builtinIds
+ where
+ str = Name.getOccString bndr
+
+-- Is the given binder normalizable? This means that its type signature can be
+-- represented in hardware, which should (?) guarantee that it can be made
+-- into hardware. Note that if a binder is not normalizable, it might become
+-- so using argument propagation.
+isNormalizeable :: CoreBndr -> TransformMonad Bool
+isNormalizeable bndr = Trans.lift (isNormalizeable' bndr)
+
+isNormalizeable' :: CoreBndr -> TranslatorSession Bool
+isNormalizeable' bndr = do
+ let ty = Id.idType bndr
+ let (arg_tys, res_ty) = Type.splitFunTys ty
+ -- This function is normalizable if all its arguments and return value are
+ -- representable.
+ andM $ mapM isRepr' (res_ty:arg_tys)