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-rw-r--r--lib/compiler/src/sys_core_fold.erl64
1 files changed, 34 insertions, 30 deletions
diff --git a/lib/compiler/src/sys_core_fold.erl b/lib/compiler/src/sys_core_fold.erl
index fa6362b7f1..102a6951e8 100644
--- a/lib/compiler/src/sys_core_fold.erl
+++ b/lib/compiler/src/sys_core_fold.erl
@@ -92,10 +92,10 @@
-endif.
%% Variable value info.
--record(sub, {v=[], %Variable substitutions
+-record(sub, {v=[], %Variable substitutions
s=cerl_sets:new() :: cerl_sets:set(), %Variables in scope
- t=[], %Types
- in_guard=false}). %In guard or not.
+ t=#{} :: map(), %Types
+ in_guard=false}). %In guard or not.
-type type_info() :: cerl:cerl() | 'bool' | 'integer'.
-type yes_no_maybe() :: 'yes' | 'no' | 'maybe'.
@@ -1123,7 +1123,7 @@ let_substs(Vs0, As0, Sub0) ->
{Vs2,As1,Ss} = let_substs_1(Vs1, As0, Sub1),
Sub2 = sub_add_scope([V || #c_var{name=V} <- Vs2], Sub1),
{Vs2,As1,
- foldl(fun ({V,S}, Sub) -> sub_set_name(V, S, Sub) end, Sub2, Ss)}.
+ foldl(fun ({V,S}, Sub) -> sub_set_name(V, S, Sub) end, Sub2, Ss)}.
let_substs_1(Vs, #c_values{es=As}, Sub) ->
let_subst_list(Vs, As, Sub);
@@ -1242,10 +1242,10 @@ is_subst(_) -> false.
%% to force renaming if variables in the scope occurs as pattern
%% variables.
-sub_new() -> #sub{v=orddict:new(),s=cerl_sets:new(),t=[]}.
+sub_new() -> #sub{v=orddict:new(),s=cerl_sets:new(),t=#{}}.
sub_new(#sub{}=Sub) ->
- Sub#sub{v=orddict:new(),t=[]}.
+ Sub#sub{v=orddict:new(),t=#{}}.
sub_new_preserve_types(#sub{}=Sub) ->
Sub#sub{v=orddict:new()}.
@@ -1760,8 +1760,9 @@ case_opt_compiler_generated(Core) ->
%% return Expr0 unchanged.
%%
case_expand_var(E, #sub{t=Tdb}) ->
- case orddict:find(cerl:var_name(E), Tdb) of
- {ok,T0} ->
+ Key = cerl:var_name(E),
+ case Tdb of
+ #{Key:=T0} ->
case cerl:is_c_tuple(T0) of
false ->
E;
@@ -1785,7 +1786,7 @@ case_expand_var(E, #sub{t=Tdb}) ->
E
end
end;
- error ->
+ _ ->
E
end.
@@ -2236,7 +2237,7 @@ move_let_into_expr(#c_let{vars=InnerVs0,body=InnerBody0}=Inner,
%% in <InnerBody>
%%
Arg = body(Arg0, Sub0),
- ScopeSub0 = sub_subst_scope(Sub0#sub{t=[]}),
+ ScopeSub0 = sub_subst_scope(Sub0#sub{t=#{}}),
{OuterVs,ScopeSub} = pattern_list(OuterVs0, ScopeSub0),
OuterBody = body(OuterBody0, ScopeSub),
@@ -2275,7 +2276,7 @@ move_let_into_expr(#c_let{vars=Lvs0,body=Lbody0}=Let,
CaVars0 = Ca0#c_clause.pats,
G0 = Ca0#c_clause.guard,
B0 = Ca0#c_clause.body,
- ScopeSub0 = sub_subst_scope(Sub0#sub{t=[]}),
+ ScopeSub0 = sub_subst_scope(Sub0#sub{t=#{}}),
{CaVars,ScopeSub} = pattern_list(CaVars0, ScopeSub0),
G = guard(G0, ScopeSub),
@@ -2574,7 +2575,7 @@ move_case_into_arg(#c_case{arg=#c_let{vars=OuterVars0,arg=OuterArg,
%% let <OuterVars> = <OuterArg>
%% in case <InnerArg> of <InnerClauses> end
%%
- ScopeSub0 = sub_subst_scope(Sub#sub{t=[]}),
+ ScopeSub0 = sub_subst_scope(Sub#sub{t=#{}}),
{OuterVars,ScopeSub} = pattern_list(OuterVars0, ScopeSub0),
InnerArg = body(InnerArg0, ScopeSub),
Outer#c_let{vars=OuterVars,arg=OuterArg,
@@ -2603,7 +2604,7 @@ move_case_into_arg(#c_case{arg=#c_case{arg=OuterArg,
%% <OuterCb>
%% end
%%
- ScopeSub0 = sub_subst_scope(Sub#sub{t=[]}),
+ ScopeSub0 = sub_subst_scope(Sub#sub{t=#{}}),
{OuterPats,ScopeSub} = pattern_list(OuterPats0, ScopeSub0),
OuterGuard = guard(OuterGuard0, ScopeSub),
InnerArg = body(InnerArg0, ScopeSub),
@@ -2688,9 +2689,9 @@ is_any_var_used([], _) -> false.
-spec get_type(cerl:cerl(), #sub{}) -> type_info() | 'none'.
get_type(#c_var{name=V}, #sub{t=Tdb}) ->
- case orddict:find(V, Tdb) of
- {ok,Type} -> Type;
- error -> none
+ case Tdb of
+ #{V:=Type} -> Type;
+ _ -> none
end;
get_type(C, _) ->
case cerl:type(C) of
@@ -2805,35 +2806,38 @@ update_types_1(#c_var{name=V,anno=Anno}, Pat, Types) ->
update_types_1(_, _, Types) -> Types.
update_types_2(V, [#c_tuple{}=P], Types) ->
- orddict:store(V, P, Types);
+ Types#{V=>P};
update_types_2(V, [#c_literal{val=Bool}], Types) when is_boolean(Bool) ->
- orddict:store(V, bool, Types);
+ Types#{V=>bool};
update_types_2(V, [Type], Types) when is_atom(Type) ->
- orddict:store(V, Type, Types);
+ Types#{V=>Type};
update_types_2(_, _, Types) -> Types.
%% kill_types(V, Tdb) -> Tdb'
%% Kill any entries that references the variable,
%% either in the key or in the value.
-kill_types(V, [{V,_}|Tdb]) ->
- kill_types(V, Tdb);
-kill_types(V, [{_,#c_tuple{}=Tuple}=Entry|Tdb]) ->
+kill_types(V, Tdb) ->
+ maps:from_list(kill_types2(V,maps:to_list(Tdb))).
+
+kill_types2(V, [{V,_}|Tdb]) ->
+ kill_types2(V, Tdb);
+kill_types2(V, [{_,#c_tuple{}=Tuple}=Entry|Tdb]) ->
case core_lib:is_var_used(V, Tuple) of
- false -> [Entry|kill_types(V, Tdb)];
- true -> kill_types(V, Tdb)
+ false -> [Entry|kill_types2(V, Tdb)];
+ true -> kill_types2(V, Tdb)
end;
-kill_types(V, [{_,Atom}=Entry|Tdb]) when is_atom(Atom) ->
- [Entry|kill_types(V, Tdb)];
-kill_types(_, []) -> [].
+kill_types2(V, [{_,Atom}=Entry|Tdb]) when is_atom(Atom) ->
+ [Entry|kill_types2(V, Tdb)];
+kill_types2(_, []) -> [].
%% copy_type(DestVar, SrcVar, Tdb) -> Tdb'
%% If the SrcVar has a type, assign it to DestVar.
%%
copy_type(V, #c_var{name=Src}, Tdb) ->
- case orddict:find(Src, Tdb) of
- {ok,Type} -> orddict:store(V, Type, Tdb);
- error -> Tdb
+ case Tdb of
+ #{Src:=Type} -> Tdb#{V=>Type};
+ _ -> Tdb
end;
copy_type(_, _, Tdb) -> Tdb.