- record = any (not . isTyVarTy) (catMaybes spec_tys)
-
- lookup = lookupSpecEnv (getIdSpecialisation id) tys
- in
- if (not enough_args) then
- pprPanic "Specialise:recordCallInst: Unsaturated Type & Dict Application:\n\t"
- (ppCat [ppr PprDebug id, ppr PprDebug [arg | (arg,_,_) <- args] ])
- else
- case record_spec id tys of
- (False, _, _)
- -> -- pprTrace "CallInst:NotReqd\n"
- -- (ppCat [ppr PprDebug id, ppCat (map (ppr PprDebug) args)])
- (returnSM emptyUDs)
-
- (True, Nothing, spec_tys)
- -> if isClassOpId id then -- No CIs for class ops, dfun will give SPEC inst
- returnSM emptyUDs
- else
- -- pprTrace "CallInst:Reqd\n"
- -- (ppAboves [ppCat [ppr PprDebug id, ppCat (map (ppr PprDebug) args)],
- -- ppCat [ppStr "CI", ppCat (map (pprMaybeTy PprDebug) spec_tys),
- -- ppCat (map (ppr PprDebug) dicts)]])
- (returnSM (singleCI new_id spec_tys dicts))
-
- (True, Just (spec_id, tys_left, toss), _)
- -> if maybeToBool (isConstMethodId_maybe spec_id) then
- -- If we got a const method spec_id see if further spec required
- -- NB: const method is top-level so spec_id will not be cloned
- case record_spec spec_id tys_left of
- (False, _, _)
- -> -- pprTrace "CallInst:Exists\n"
- -- (ppAboves [ppCat [ppr PprDebug id, ppCat (map (ppr PprDebug) args)],
- -- ppCat [ppStr "->", ppr PprDebug spec_id,
- -- ppr PprDebug (tys_left ++ drop toss dicts)]])
- (returnSM emptyUDs)
-
- (True, Nothing, spec_tys)
- -> -- pprTrace "CallInst:Exists:Reqd\n"
- -- (ppAboves [ppCat [ppr PprDebug id, ppCat (map (ppr PprDebug) args)],
- -- ppCat [ppStr "->", ppr PprDebug spec_id,
- -- ppr PprDebug (tys_left ++ drop toss dicts)],
- -- ppCat [ppStr "CI", ppCat (map (pprMaybeTy PprDebug) spec_tys),
- -- ppCat (map (ppr PprDebug) (drop toss dicts))]])
- (returnSM (singleCI spec_id spec_tys (drop toss dicts)))
-
- (True, Just (spec_spec_id, tys_left_left, toss_toss), _)
- -> -- pprTrace "CallInst:Exists:Exists\n"
- -- (ppAboves [ppCat [ppr PprDebug id, ppCat (map (ppr PprDebug) args)],
- -- ppCat [ppStr "->", ppr PprDebug spec_id,
- -- ppr PprDebug (tys_left ++ drop toss dicts)],
- -- ppCat [ppStr "->", ppr PprDebug spec_spec_id,
- -- ppr PprDebug (tys_left_left ++ drop (toss + toss_toss) dicts)]])
- (returnSM emptyUDs)
-
- else
- -- pprTrace "CallInst:Exists\n"
- -- (ppAboves [ppCat [ppr PprDebug id, ppCat (map (ppr PprDebug) args)],
- -- ppCat [ppStr "->", ppr PprDebug spec_id,
- -- ppr PprDebug (tys_left ++ drop toss dicts)]])
- (returnSM emptyUDs)
-
-
-take_type_args (_:tyvars) class_tyvar_pairs ((TypeArg ty,_,_):args)
- = case take_type_args tyvars class_tyvar_pairs args of
- Nothing -> Nothing
- Just (tys, dicts, others) -> Just (ty:tys, dicts, others)
-take_type_args (_:tyvars) class_tyvar_pairs []
- = Nothing
-take_type_args [] class_tyvar_pairs args
- = case take_dict_args class_tyvar_pairs args of
- Nothing -> Nothing
- Just (dicts, others) -> Just ([], dicts, others)
-
-take_dict_args (_:class_tyvar_pairs) ((dict@(ValArg _),_,_):args)
- = case take_dict_args class_tyvar_pairs args of
- Nothing -> Nothing
- Just (dicts, others) -> Just (dict:dicts, others)
-take_dict_args (_:class_tyvar_pairs) []
- = Nothing
-take_dict_args [] args
- = Just ([], args)
-\end{code}
-
-\begin{code}
-mkCall :: Id
- -> [(CoreArg, UsageDetails, CoreExpr -> CoreExpr)]
- -> SpecM (Bool, CoreExpr)
-
-mkCall new_id args
- | maybeToBool (isSuperDictSelId_maybe new_id)
- && any isUnboxedDataType ty_args
- -- No specialisations for super-dict selectors
- -- Specialise unboxed calls to SuperDictSelIds by extracting
- -- the super class dictionary directly form the super class
- -- NB: This should be dead code since all uses of this dictionary should
- -- have been specialised. We only do this to keep core-lint happy.
- = let
- Just (_, super_class) = isSuperDictSelId_maybe new_id
- super_dict_id = case lookupClassInstAtSimpleType super_class (head ty_args) of
- Nothing -> panic "Specialise:mkCall:SuperDictId"
- Just id -> id
- in
- returnSM (False, Var super_dict_id)
-
- | otherwise
- = case lookupSpecEnv (getIdSpecialisation new_id) ty_args of
- Nothing -> checkUnspecOK new_id ty_args (
- returnSM (False, unspec_call)
- )
-
- Just spec_1_details@(spec_id_1, tys_left_1, dicts_to_toss_1)
- -> let
- -- It may be necessary to specialsie a constant method spec_id again
- (spec_id, tys_left, dicts_to_toss) =
- case (maybeToBool (isConstMethodId_maybe spec_id_1),
- lookupSpecEnv (getIdSpecialisation spec_id_1) tys_left_1) of
- (False, _ ) -> spec_1_details
- (True, Nothing) -> spec_1_details
- (True, Just (spec_id_2, tys_left_2, dicts_to_toss_2))
- -> (spec_id_2, tys_left_2, dicts_to_toss_1 + dicts_to_toss_2)
-
- args_left = toss_dicts dicts_to_toss val_args
- in
- checkSpecOK new_id ty_args spec_id tys_left (
-
- -- The resulting spec_id may be a top-level unboxed value
- -- This can arise for:
- -- 1) constant method values
- -- eq: class Num a where pi :: a
- -- instance Num Double# where pi = 3.141#
- -- 2) specilised overloaded values
- -- eq: i1 :: Num a => a
- -- i1 Int# d.Num.Int# ==> i1.Int#
- -- These top level defns should have been lifted.
- -- We must add code to unlift such a spec_id.
-
- if isUnboxedDataType (idType spec_id) then
- ASSERT (null tys_left && null args_left)
- if toplevelishId spec_id then
- liftId spec_id `thenSM` \ (lift_spec_id, unlift_spec_id) ->
- returnSM (True, bindUnlift lift_spec_id unlift_spec_id
- (Var unlift_spec_id))
- else
- pprPanic "Specialise:mkCall: unboxed spec_id not top-level ...\n"
- (ppCat [ppr PprDebug new_id,
- ppInterleave ppNil (map (pprParendType PprDebug) ty_args),
- ppStr "==>",
- ppr PprDebug spec_id])
- else
- let
- (vals_left, _, unlifts_left) = unzip3 args_left
- applied_tys = mkCoTyApps (Var spec_id) tys_left
- applied_vals = mkGenApp applied_tys vals_left
- in
- returnSM (True, applyBindUnlifts unlifts_left applied_vals)
- )