pprSectionHeader section $$ vcat (map pprData dats)
-- special case for split markers:
-pprNatCmmTop (CmmProc [] lbl _ []) = pprLabel lbl
+pprNatCmmTop (CmmProc [] lbl _ (ListGraph [])) = pprLabel lbl
-pprNatCmmTop (CmmProc info lbl params blocks) =
+pprNatCmmTop (CmmProc info lbl params (ListGraph blocks)) =
pprSectionHeader Text $$
(if not (null info)
then