+
+-- 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. This checks whether all the arguments and (optionally)
+-- the return value are
+-- representable.
+isNormalizeable ::
+ Bool -- ^ Allow the result to be unrepresentable?
+ -> CoreBndr -- ^ The binder to check
+ -> TranslatorSession Bool -- ^ Is it normalizeable?
+isNormalizeable result_nonrep bndr = do
+ let ty = Id.idType bndr
+ let (arg_tys, res_ty) = Type.splitFunTys ty
+ let check_tys = if result_nonrep then arg_tys else (res_ty:arg_tys)
+ andM $ mapM isRepr' check_tys