liftExpr expr@(StgPrim op args lvs) = returnLM (expr, emptyLiftInfo)
liftExpr expr@(StgApp (StgLitArg lit) args lvs) = returnLM (expr, emptyLiftInfo)
+liftExpr expr@(StgApp (StgConArg con) args lvs) = returnLM (expr, emptyLiftInfo)
liftExpr expr@(StgApp (StgVarArg v) args lvs)
= lookUp v `thenLM` \ ~(sc, sc_args) -> -- NB the ~. We don't want to
-- poke these bindings too early!