import VarEnv
import CoreSyn
import CoreUtils ( applyTypeToArgs, mkPiTypes )
-import CoreFVs ( exprFreeVars, exprsFreeVars, idRuleVars )
+import CoreFVs ( exprFreeVars, exprsFreeVars, idFreeVars )
import CoreTidy ( tidyRules )
import CoreLint ( showPass, endPass )
import Rules ( addIdSpecialisations, mkLocalRule, lookupRule, emptyRuleBase, rulesOfBinds )
bndrs = map fst prs
rhs_fvs = unionVarSets (map pair_fvs prs)
-pair_fvs (bndr, rhs) = exprFreeVars rhs `unionVarSet` idRuleVars bndr
+pair_fvs (bndr, rhs) = exprFreeVars rhs `unionVarSet` idFreeVars bndr
-- Don't forget variables mentioned in the
-- rules of the bndr. C.f. OccAnal.addRuleUsage
-
+ -- Also tyvars mentioned in its type; they may not appear in the RHS
+ -- type T a = Int
+ -- x :: T a = 3
addDictBind (dict,rhs) uds = uds { dict_binds = mkDB (NonRec dict rhs) `consBag` dict_binds uds }