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author | Kostis Sagonas <[email protected]> | 2010-10-14 15:12:18 +0300 |
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committer | Björn Gustavsson <[email protected]> | 2010-10-29 10:28:55 +0200 |
commit | 0c18ec99449775f08555445957bbbc089cdc90f0 (patch) | |
tree | c87a34ff292f7b22ad66f5f55937d5afc27229b3 /lib/hipe/cerl | |
parent | d8f8eeba477fd8872f1136fc507fa299f013cc46 (diff) | |
download | otp-0c18ec99449775f08555445957bbbc089cdc90f0.tar.gz otp-0c18ec99449775f08555445957bbbc089cdc90f0.tar.bz2 otp-0c18ec99449775f08555445957bbbc089cdc90f0.zip |
Deeper unfolding of recursive types
The change of taking out some hard-coded information about the file module
uncovered that the unfolding of recursive types was probably too shallow.
This has been fixed by unfolding it until a deeper limit (REC_TYPE_LIMIT).
While at erl_types.erl also did some cleanup changes and fixed an erroneous
io:format message.
Diffstat (limited to 'lib/hipe/cerl')
-rw-r--r-- | lib/hipe/cerl/erl_types.erl | 63 |
1 files changed, 33 insertions, 30 deletions
diff --git a/lib/hipe/cerl/erl_types.erl b/lib/hipe/cerl/erl_types.erl index 9bc56c99ff..4dd124a457 100644 --- a/lib/hipe/cerl/erl_types.erl +++ b/lib/hipe/cerl/erl_types.erl @@ -29,7 +29,7 @@ %% In late 2008, Manouk Manoukian and Kostis Sagonas added support for %% opaque types to the structure-based representation of types. %% During February and March 2009, Kostis Sagonas significantly -%% cleaned up the type representation added spec declarations. +%% cleaned up the type representation and added spec declarations. %% %% ====================================================================== @@ -714,12 +714,13 @@ t_solve_remote_type(#remote{mod = RemMod, name = Name, args = Args} = RemType, case lookup_type(Name, RemDict) of {type, {_Mod, Type, ArgNames}} when ArgsLen =:= length(ArgNames) -> {NewType, NewCycle, NewRR} = - case unfold(RemType, C) of + case can_unfold_more(RemType, C) of true -> List = lists:zip(ArgNames, Args), TmpVarDict = dict:from_list(List), {t_from_form(Type, RemDict, TmpVarDict), [RemType|C], []}; - false -> {t_any(), C, [RemType]} + false -> + {t_any(), C, [RemType]} end, {RT, RR} = t_solve_remote(NewType, ET, R, NewCycle), RetRR = NewRR ++ RR, @@ -733,9 +734,11 @@ t_solve_remote_type(#remote{mod = RemMod, name = Name, args = Args} = RemType, List = lists:zip(ArgNames, Args), TmpVarDict = dict:from_list(List), {Rep, NewCycle, NewRR} = - case unfold(RemType, C) of - true -> {t_from_form(Type, RemDict, TmpVarDict), [RemType|C], []}; - false -> {t_any(), C, [RemType]} + case can_unfold_more(RemType, C) of + true -> + {t_from_form(Type, RemDict, TmpVarDict), [RemType|C], []}; + false -> + {t_any(), C, [RemType]} end, {NewRep, RR} = t_solve_remote(Rep, ET, R, NewCycle), RetRR = NewRR ++ RR, @@ -2388,9 +2391,9 @@ inf_tuple_sets([{Arity, Tuples1}|Left1], [{Arity, Tuples2}|Left2], Acc, Mode) -> [] -> inf_tuple_sets(Left1, Left2, Acc, Mode); NewTuples -> inf_tuple_sets(Left1, Left2, [{Arity, NewTuples}|Acc], Mode) end; -inf_tuple_sets(L1 = [{Arity1, _}|Left1], L2 = [{Arity2, _}|Left2], Acc, Mode) -> - if Arity1 < Arity2 -> inf_tuple_sets(Left1, L2, Acc, Mode); - Arity1 > Arity2 -> inf_tuple_sets(L1, Left2, Acc, Mode) +inf_tuple_sets([{Arity1, _}|Ts1] = L1, [{Arity2, _}|Ts2] = L2, Acc, Mode) -> + if Arity1 < Arity2 -> inf_tuple_sets(Ts1, L2, Acc, Mode); + Arity1 > Arity2 -> inf_tuple_sets(L1, Ts2, Acc, Mode) end; inf_tuple_sets([], _, Acc, _Mode) -> lists:reverse(Acc); inf_tuple_sets(_, [], Acc, _Mode) -> lists:reverse(Acc). @@ -2406,17 +2409,17 @@ inf_tuples_in_sets(L1, [?tuple(Elements2, _, ?any)], Mode) -> inf_tuples_in_sets(L1, L2, Mode) -> inf_tuples_in_sets(L1, L2, [], Mode). -inf_tuples_in_sets([?tuple(Elements1, Arity, Tag)|Left1], - [?tuple(Elements2, Arity, Tag)|Left2], Acc, Mode) -> +inf_tuples_in_sets([?tuple(Elements1, Arity, Tag)|Ts1], + [?tuple(Elements2, Arity, Tag)|Ts2], Acc, Mode) -> case t_inf_lists_strict(Elements1, Elements2, Mode) of - bottom -> inf_tuples_in_sets(Left1, Left2, Acc, Mode); - NewElements -> - inf_tuples_in_sets(Left1, Left2, [?tuple(NewElements, Arity, Tag)|Acc], Mode) + bottom -> inf_tuples_in_sets(Ts1, Ts2, Acc, Mode); + NewElements -> + inf_tuples_in_sets(Ts1, Ts2, [?tuple(NewElements, Arity, Tag)|Acc], Mode) end; -inf_tuples_in_sets([?tuple(_, _, Tag1)|Left1] = L1, - [?tuple(_, _, Tag2)|Left2] = L2, Acc, Mode) -> - if Tag1 < Tag2 -> inf_tuples_in_sets(Left1, L2, Acc, Mode); - Tag1 > Tag2 -> inf_tuples_in_sets(L1, Left2, Acc, Mode) +inf_tuples_in_sets([?tuple(_, _, Tag1)|Ts1] = L1, + [?tuple(_, _, Tag2)|Ts2] = L2, Acc, Mode) -> + if Tag1 < Tag2 -> inf_tuples_in_sets(Ts1, L2, Acc, Mode); + Tag1 > Tag2 -> inf_tuples_in_sets(L1, Ts2, Acc, Mode) end; inf_tuples_in_sets([], _, Acc, _Mode) -> lists:reverse(Acc); inf_tuples_in_sets(_, [], Acc, _Mode) -> lists:reverse(Acc). @@ -2791,13 +2794,13 @@ t_subtract(?opaque(Set1), ?opaque(Set2)) -> Set -> ?opaque(Set) end; t_subtract(?matchstate(Pres1, Slots1), ?matchstate(Pres2, _Slots2)) -> - Pres = t_subtract(Pres1,Pres2), + Pres = t_subtract(Pres1, Pres2), case t_is_none(Pres) of true -> ?none; - false -> ?matchstate(Pres,Slots1) + false -> ?matchstate(Pres, Slots1) end; -t_subtract(?matchstate(Present,Slots),_) -> - ?matchstate(Present,Slots); +t_subtract(?matchstate(Present, Slots), _) -> + ?matchstate(Present, Slots); t_subtract(?nil, ?nil) -> ?none; t_subtract(?nil, ?nonempty_list(_, _)) -> @@ -3634,7 +3637,7 @@ t_from_form({type, _L, union, Args}, TypeNames, InOpaque, RecDict, VarDict) -> t_from_form({type, _L, Name, Args}, TypeNames, InOpaque, RecDict, VarDict) -> case lookup_type(Name, RecDict) of {type, {_Module, Type, ArgNames}} when length(Args) =:= length(ArgNames) -> - case unfold({type, Name}, TypeNames) of + case can_unfold_more({type, Name}, TypeNames) of true -> List = lists:zipwith( fun(ArgName, ArgType) -> @@ -3655,7 +3658,7 @@ t_from_form({type, _L, Name, Args}, TypeNames, InOpaque, RecDict, VarDict) -> end; {opaque, {Module, Type, ArgNames}} when length(Args) =:= length(ArgNames) -> {Rep, Rret} = - case unfold({opaque, Name}, TypeNames) of + case can_unfold_more({opaque, Name}, TypeNames) of true -> List = lists:zipwith( fun(ArgName, ArgType) -> @@ -3698,7 +3701,7 @@ t_from_form({opaque, _L, Name, {Mod, Args, Rep}}, _TypeNames, _InOpaque, record_from_form({atom, _, Name}, ModFields, TypeNames, InOpaque, RecDict, VarDict) -> - case unfold({record, Name}, TypeNames) of + case can_unfold_more({record, Name}, TypeNames) of true -> case lookup_record(Name, RecDict) of {ok, DeclFields} -> @@ -3716,7 +3719,7 @@ record_from_form({atom, _, Name}, ModFields, TypeNames, InOpaque, RecDict, RecDict, VarDict), case GetModRec of {error, FieldName} -> - throw({error, io_lib:format("Illegal declaration of ~w#{~w}\n", + throw({error, io_lib:format("Illegal declaration of #~w{~w}\n", [Name, FieldName])}); {ok, NewFields} -> {t_tuple( @@ -3724,8 +3727,7 @@ record_from_form({atom, _, Name}, ModFields, TypeNames, InOpaque, RecDict, R1 ++ R2} end; error -> - throw({error, erlang:error(io_lib:format("Unknown record #~w{}\n", - [Name]))}) + throw({error, io_lib:format("Unknown record #~w{}\n", [Name])}) end; false -> {t_any(), []} end. @@ -3946,8 +3948,9 @@ lookup_type(Name, RecDict) -> type_is_defined(TypeOrOpaque, Name, RecDict) -> dict:is_key({TypeOrOpaque, Name}, RecDict). -unfold(TypeName, TypeNames) -> - not lists:member(TypeName, TypeNames). +can_unfold_more(TypeName, TypeNames) -> + Fun = fun(E, Acc) -> case E of TypeName -> Acc + 1; _ -> Acc end end, + lists:foldl(Fun, 0, TypeNames) < ?REC_TYPE_LIMIT. %% ----------------------------------- %% Set |