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-rw-r--r--lib/hipe/cerl/erl_types.erl162
1 files changed, 54 insertions, 108 deletions
diff --git a/lib/hipe/cerl/erl_types.erl b/lib/hipe/cerl/erl_types.erl
index 19396a58d8..84addcc105 100644
--- a/lib/hipe/cerl/erl_types.erl
+++ b/lib/hipe/cerl/erl_types.erl
@@ -236,7 +236,7 @@
-export([t_is_identifier/1]).
-endif.
--export_type([erl_type/0, opaques/0, type_table/0, var_table/0]).
+-export_type([erl_type/0, opaques/0, type_table/0]).
%%-define(DEBUG, true).
@@ -380,7 +380,7 @@
-type type_table() :: dict:dict(record_key() | type_key(),
record_value() | type_value()).
--opaque var_table() :: #{atom() => erl_type()}.
+-type var_table() :: #{atom() => erl_type()}.
%%-----------------------------------------------------------------------------
%% Unions
@@ -3295,87 +3295,33 @@ findfirst(N1, N2, U1, B1, U2, B2) ->
%%-----------------------------------------------------------------------------
%% Substitution of variables
%%
-%% Dialyzer versions prior to R15B used a dict data structure to map variables
-%% to types. Hans Bolinder suggested the use of lists of Key-Value pairs for
-%% this data structure and measurements showed a non-trivial speedup when using
-%% them for operations within this module (e.g. in t_unify/2). However, there
-%% is code outside erl_types that still passes a dict:dict() in the 2nd argument.
-%% So, for the time being, this module provides a t_subst/2 function for these
-%% external calls and a clone of it (t_subst_kv/2) which is used from all calls
-%% from within this module. This code duplication needs to be eliminated at
-%% some point.
-
--spec t_subst(erl_type(), #{atom() => erl_type()}) -> erl_type().
-
-t_subst(T, Dict) ->
+
+-type subst_table() :: #{any() => erl_type()}.
+
+-spec t_subst(erl_type(), subst_table()) -> erl_type().
+
+t_subst(T, Map) ->
case t_has_var(T) of
- true -> t_subst_dict(T, Dict);
+ true -> t_subst_aux(T, Map);
false -> T
end.
-t_subst_dict(?var(Id), Dict) ->
- case maps:find(Id, Dict) of
- error -> ?any;
- {ok, Type} -> Type
- end;
-t_subst_dict(?list(Contents, Termination, Size), Dict) ->
- case t_subst_dict(Contents, Dict) of
- ?none -> ?none;
- NewContents ->
- %% Be careful here to make the termination collapse if necessary.
- case t_subst_dict(Termination, Dict) of
- ?nil -> ?list(NewContents, ?nil, Size);
- ?any -> ?list(NewContents, ?any, Size);
- Other ->
- ?list(NewContents2, NewTermination, _) = t_cons(NewContents, Other),
- ?list(NewContents2, NewTermination, Size)
- end
- end;
-t_subst_dict(?function(Domain, Range), Dict) ->
- ?function(t_subst_dict(Domain, Dict), t_subst_dict(Range, Dict));
-t_subst_dict(?product(Types), Dict) ->
- ?product([t_subst_dict(T, Dict) || T <- Types]);
-t_subst_dict(?tuple(?any, ?any, ?any) = T, _Dict) ->
- T;
-t_subst_dict(?tuple(Elements, _Arity, _Tag), Dict) ->
- t_tuple([t_subst_dict(E, Dict) || E <- Elements]);
-t_subst_dict(?tuple_set(_) = TS, Dict) ->
- t_sup([t_subst_dict(T, Dict) || T <- t_tuple_subtypes(TS)]);
-t_subst_dict(?map(Pairs, DefK, DefV), Dict) ->
- t_map([{K, MNess, t_subst_dict(V, Dict)} || {K, MNess, V} <- Pairs],
- t_subst_dict(DefK, Dict), t_subst_dict(DefV, Dict));
-t_subst_dict(?opaque(Es), Dict) ->
- List = [Opaque#opaque{args = [t_subst_dict(Arg, Dict) || Arg <- Args],
- struct = t_subst_dict(S, Dict)} ||
- Opaque = #opaque{args = Args, struct = S} <- set_to_list(Es)],
- ?opaque(ordsets:from_list(List));
-t_subst_dict(?union(List), Dict) ->
- ?union([t_subst_dict(E, Dict) || E <- List]);
-t_subst_dict(T, _Dict) ->
- T.
-
-spec subst_all_vars_to_any(erl_type()) -> erl_type().
subst_all_vars_to_any(T) ->
- t_subst_kv(T, []).
+ t_subst(T, #{}).
-t_subst_kv(T, KVMap) ->
- case t_has_var(T) of
- true -> t_subst_aux(T, KVMap);
- false -> T
- end.
-
-t_subst_aux(?var(Id), VarMap) ->
- case lists:keyfind(Id, 1, VarMap) of
- false -> ?any;
- {Id, Type} -> Type
+t_subst_aux(?var(Id), Map) ->
+ case maps:find(Id, Map) of
+ error -> ?any;
+ {ok, Type} -> Type
end;
-t_subst_aux(?list(Contents, Termination, Size), VarMap) ->
- case t_subst_aux(Contents, VarMap) of
+t_subst_aux(?list(Contents, Termination, Size), Map) ->
+ case t_subst_aux(Contents, Map) of
?none -> ?none;
NewContents ->
%% Be careful here to make the termination collapse if necessary.
- case t_subst_aux(Termination, VarMap) of
+ case t_subst_aux(Termination, Map) of
?nil -> ?list(NewContents, ?nil, Size);
?any -> ?list(NewContents, ?any, Size);
Other ->
@@ -3383,27 +3329,27 @@ t_subst_aux(?list(Contents, Termination, Size), VarMap) ->
?list(NewContents2, NewTermination, Size)
end
end;
-t_subst_aux(?function(Domain, Range), VarMap) ->
- ?function(t_subst_aux(Domain, VarMap), t_subst_aux(Range, VarMap));
-t_subst_aux(?product(Types), VarMap) ->
- ?product([t_subst_aux(T, VarMap) || T <- Types]);
-t_subst_aux(?tuple(?any, ?any, ?any) = T, _VarMap) ->
+t_subst_aux(?function(Domain, Range), Map) ->
+ ?function(t_subst_aux(Domain, Map), t_subst_aux(Range, Map));
+t_subst_aux(?product(Types), Map) ->
+ ?product([t_subst_aux(T, Map) || T <- Types]);
+t_subst_aux(?tuple(?any, ?any, ?any) = T, _Map) ->
T;
-t_subst_aux(?tuple(Elements, _Arity, _Tag), VarMap) ->
- t_tuple([t_subst_aux(E, VarMap) || E <- Elements]);
-t_subst_aux(?tuple_set(_) = TS, VarMap) ->
- t_sup([t_subst_aux(T, VarMap) || T <- t_tuple_subtypes(TS)]);
-t_subst_aux(?map(Pairs, DefK, DefV), VarMap) ->
- t_map([{K, MNess, t_subst_aux(V, VarMap)} || {K, MNess, V} <- Pairs],
- t_subst_aux(DefK, VarMap), t_subst_aux(DefV, VarMap));
-t_subst_aux(?opaque(Es), VarMap) ->
- List = [Opaque#opaque{args = [t_subst_aux(Arg, VarMap) || Arg <- Args],
- struct = t_subst_aux(S, VarMap)} ||
- Opaque = #opaque{args = Args, struct = S} <- set_to_list(Es)],
- ?opaque(ordsets:from_list(List));
-t_subst_aux(?union(List), VarMap) ->
- ?union([t_subst_aux(E, VarMap) || E <- List]);
-t_subst_aux(T, _VarMap) ->
+t_subst_aux(?tuple(Elements, _Arity, _Tag), Map) ->
+ t_tuple([t_subst_aux(E, Map) || E <- Elements]);
+t_subst_aux(?tuple_set(_) = TS, Map) ->
+ t_sup([t_subst_aux(T, Map) || T <- t_tuple_subtypes(TS)]);
+t_subst_aux(?map(Pairs, DefK, DefV), Map) ->
+ t_map([{K, MNess, t_subst_aux(V, Map)} || {K, MNess, V} <- Pairs],
+ t_subst_aux(DefK, Map), t_subst_aux(DefV, Map));
+t_subst_aux(?opaque(Es), Map) ->
+ List = [Opaque#opaque{args = [t_subst_aux(Arg, Map) || Arg <- Args],
+ struct = t_subst_aux(S, Map)} ||
+ Opaque = #opaque{args = Args, struct = S} <- set_to_list(Es)],
+ ?opaque(ordsets:from_list(List));
+t_subst_aux(?union(List), Map) ->
+ ?union([t_subst_aux(E, Map) || E <- List]);
+t_subst_aux(T, _Map) ->
T.
%%-----------------------------------------------------------------------------
@@ -3415,33 +3361,33 @@ t_subst_aux(T, _VarMap) ->
-spec t_unify(erl_type(), erl_type()) -> t_unify_ret().
t_unify(T1, T2) ->
- {T, VarMap} = t_unify(T1, T2, []),
- {t_subst_kv(T, VarMap), lists:keysort(1, VarMap)}.
+ {T, VarMap} = t_unify(T1, T2, #{}),
+ {t_subst(T, VarMap), lists:keysort(1, maps:to_list(VarMap))}.
t_unify(?var(Id) = T, ?var(Id), VarMap) ->
{T, VarMap};
t_unify(?var(Id1) = T, ?var(Id2), VarMap) ->
- case lists:keyfind(Id1, 1, VarMap) of
- false ->
- case lists:keyfind(Id2, 1, VarMap) of
- false -> {T, [{Id2, T} | VarMap]};
- {Id2, Type} -> t_unify(T, Type, VarMap)
+ case maps:find(Id1, VarMap) of
+ error ->
+ case maps:find(Id2, VarMap) of
+ error -> {T, VarMap#{Id2 => T}};
+ {ok, Type} -> t_unify(T, Type, VarMap)
end;
- {Id1, Type1} ->
- case lists:keyfind(Id2, 1, VarMap) of
- false -> {Type1, [{Id2, T} | VarMap]};
- {Id2, Type2} -> t_unify(Type1, Type2, VarMap)
+ {ok, Type1} ->
+ case maps:find(Id2, VarMap) of
+ error -> {Type1, VarMap#{Id2 => T}};
+ {ok, Type2} -> t_unify(Type1, Type2, VarMap)
end
end;
t_unify(?var(Id), Type, VarMap) ->
- case lists:keyfind(Id, 1, VarMap) of
- false -> {Type, [{Id, Type} | VarMap]};
- {Id, VarType} -> t_unify(VarType, Type, VarMap)
+ case maps:find(Id, VarMap) of
+ error -> {Type, VarMap#{Id => Type}};
+ {ok, VarType} -> t_unify(VarType, Type, VarMap)
end;
t_unify(Type, ?var(Id), VarMap) ->
- case lists:keyfind(Id, 1, VarMap) of
- false -> {Type, [{Id, Type} | VarMap]};
- {Id, VarType} -> t_unify(VarType, Type, VarMap)
+ case maps:find(Id, VarMap) of
+ error -> {Type, VarMap#{Id => Type}};
+ {ok, VarType} -> t_unify(VarType, Type, VarMap)
end;
t_unify(?function(Domain1, Range1), ?function(Domain2, Range2), VarMap) ->
{Domain, VarMap1} = t_unify(Domain1, Domain2, VarMap),
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-30 04:30:32 +0000