Merge branch 'maint'

* maint:
  dialyzer: Compact 'file' annotations in Core code
  dialyzer: Try to reduce memory usage
  dialyzer: Use less memory when translating contracts
  dialyzer: Use maps instaed of dict
  dialyzer: Use maps instead of dict for module contracts map
  dialyzer: Compress a few more ETS tables
  dialyzer: Optimize memory consumption
  dialyzer: Reduce memory consumption during 'remote' phase
  dialyzer: Update code for finding parallelism
  compiler: Do not spawn process when dialyzing
  dialyzer: Reduce ETS usage during the typesig phase
  dialyzer: Optimize graph condensation
  dialyzer: Do not send full PLTs as messages

12 files changed, 529 insertions, 321 deletions

diff --git a/lib/dialyzer/src/dialyzer_analysis_callgraph.erl b/lib/dialyzer/src/dialyzer_analysis_callgraph.erl
index b5510731e0..ae1e4d8c38 100644
--- a/lib/dialyzer/src/dialyzer_analysis_callgraph.erl
+++ b/lib/dialyzer/src/dialyzer_analysis_callgraph.erl
@@ -94,9 +94,9 @@ loop(#server_state{parent = Parent} = State,
     {AnalPid, cserver, CServer, Plt} ->
       send_codeserver_plt(Parent, CServer, Plt),
       loop(State, Analysis, ExtCalls);
-    {AnalPid, done, Plt, DocPlt} ->
+    {AnalPid, done, MiniPlt, DocPlt} ->
       send_ext_calls(Parent, ExtCalls),
-      send_analysis_done(Parent, Plt, DocPlt);
+      send_analysis_done(Parent, MiniPlt, DocPlt);
     {AnalPid, ext_calls, NewExtCalls} ->
       loop(State, Analysis, NewExtCalls);
     {AnalPid, ext_types, ExtTypes} ->
@@ -114,6 +114,7 @@ loop(#server_state{parent = Parent} = State,
 %% The Analysis
 %%--------------------------------------------------------------------
 
+%% Calls to erlang:garbage_collect() help to reduce the heap size.
 analysis_start(Parent, Analysis, LegalWarnings) ->
   CServer = dialyzer_codeserver:new(),
   Plt = Analysis#analysis.plt,
@@ -150,12 +151,9 @@ analysis_start(Parent, Analysis, LegalWarnings) ->
       TmpCServer1 = dialyzer_codeserver:set_temp_records(MergedRecords, TmpCServer0),
       TmpCServer2 =
         dialyzer_codeserver:finalize_exported_types(MergedExpTypes, TmpCServer1),
+      erlang:garbage_collect(),
       ?timing(State#analysis_state.timing_server, "remote",
-              begin
-                TmpCServer3 =
-                  dialyzer_utils:process_record_remote_types(TmpCServer2),
-                dialyzer_contracts:process_contract_remote_types(TmpCServer3)
-              end)
+              contracts_and_records(TmpCServer2))
     catch
       throw:{error, _ErrorMsg} = Error -> exit(Error)
     end,
@@ -164,48 +162,75 @@ analysis_start(Parent, Analysis, LegalWarnings) ->
   NewPlt1 = dialyzer_plt:insert_exported_types(NewPlt0, ExpTypes),
   State0 = State#analysis_state{plt = NewPlt1},
   dump_callgraph(Callgraph, State0, Analysis),
-  State1 = State0#analysis_state{codeserver = NewCServer},
   %% Remove all old versions of the files being analyzed
   AllNodes = dialyzer_callgraph:all_nodes(Callgraph),
-  Plt1 = dialyzer_plt:delete_list(NewPlt1, AllNodes),
+  Plt1_a = dialyzer_plt:delete_list(NewPlt1, AllNodes),
+  Plt1 = dialyzer_plt:insert_callbacks(Plt1_a, NewCServer),
+  State1 = State0#analysis_state{codeserver = NewCServer, plt = Plt1},
   Exports = dialyzer_codeserver:get_exports(NewCServer),
+  NonExports = sets:subtract(sets:from_list(AllNodes), Exports),
+  NonExportsList = sets:to_list(NonExports),
   NewCallgraph =
     case Analysis#analysis.race_detection of
       true -> dialyzer_callgraph:put_race_detection(true, Callgraph);
       false -> Callgraph
     end,
-  State2 = analyze_callgraph(NewCallgraph, State1#analysis_state{plt = Plt1}),
+  State2 = analyze_callgraph(NewCallgraph, State1),
+  #analysis_state{plt = MiniPlt2, doc_plt = DocPlt} = State2,
   dialyzer_callgraph:dispose_race_server(NewCallgraph),
   rcv_and_send_ext_types(Parent),
-  NonExports = sets:subtract(sets:from_list(AllNodes), Exports),
-  NonExportsList = sets:to_list(NonExports),
-  Plt2 = dialyzer_plt:delete_list(State2#analysis_state.plt, NonExportsList),
-  send_codeserver_plt(Parent, CServer, State2#analysis_state.plt),
-  send_analysis_done(Parent, Plt2, State2#analysis_state.doc_plt).
+  %% Since the PLT is never used, a dummy is sent:
+  DummyPlt = dialyzer_plt:new(),
+  send_codeserver_plt(Parent, CServer, DummyPlt),
+  MiniPlt3 = dialyzer_plt:delete_list(MiniPlt2, NonExportsList),
+  send_analysis_done(Parent, MiniPlt3, DocPlt).
+
+contracts_and_records(CodeServer) ->
+  Fun = contrs_and_recs(CodeServer),
+  {Pid, Ref} = erlang:spawn_monitor(Fun),
+  dialyzer_codeserver:give_away(CodeServer, Pid),
+  Pid ! {self(), go},
+  receive {'DOWN', Ref, process, Pid, Return} ->
+      Return
+  end.
+
+-spec contrs_and_recs(dialyzer_codeserver:codeserver()) ->
+                         fun(() -> no_return()).
+
+contrs_and_recs(TmpCServer2) ->
+  fun() ->
+      Parent = receive {Pid, go} -> Pid end,
+      {TmpCServer3, RecordDict} =
+        dialyzer_utils:process_record_remote_types(TmpCServer2),
+      TmpServer4 =
+        dialyzer_contracts:process_contract_remote_types(TmpCServer3,
+                                                         RecordDict),
+      dialyzer_codeserver:give_away(TmpServer4, Parent),
+      exit(TmpServer4)
+  end.
 
 analyze_callgraph(Callgraph, #analysis_state{codeserver = Codeserver,
 					     doc_plt = DocPlt,
+                                             plt = Plt,
 					     timing_server = TimingServer,
 					     parent = Parent,
                                              solvers = Solvers} = State) ->
-  Plt = dialyzer_plt:insert_callbacks(State#analysis_state.plt, Codeserver),
-  {NewPlt, NewDocPlt} =
-    case State#analysis_state.analysis_type of
-      plt_build ->
-	NewPlt0 =
-	  dialyzer_succ_typings:analyze_callgraph(Callgraph, Plt, Codeserver,
-						  TimingServer, Solvers, Parent),
-	{NewPlt0, DocPlt};
-      succ_typings ->
-	{Warnings, NewPlt0, NewDocPlt0} =
-	  dialyzer_succ_typings:get_warnings(Callgraph, Plt, DocPlt, Codeserver,
-					     TimingServer, Solvers, Parent),
-        Warnings1 = filter_warnings(Warnings, Codeserver),
-	send_warnings(State#analysis_state.parent, Warnings1),
-	{NewPlt0, NewDocPlt0}
-    end,
-  dialyzer_callgraph:delete(Callgraph),
-  State#analysis_state{plt = NewPlt, doc_plt = NewDocPlt}.
+  case State#analysis_state.analysis_type of
+    plt_build ->
+      NewMiniPlt =
+        dialyzer_succ_typings:analyze_callgraph(Callgraph, Plt, Codeserver,
+                                                TimingServer, Solvers, Parent),
+      dialyzer_callgraph:delete(Callgraph),
+      State#analysis_state{plt = NewMiniPlt, doc_plt = DocPlt};
+    succ_typings ->
+      {Warnings, NewMiniPlt, NewDocPlt} =
+        dialyzer_succ_typings:get_warnings(Callgraph, Plt, DocPlt, Codeserver,
+                                           TimingServer, Solvers, Parent),
+      dialyzer_callgraph:delete(Callgraph),
+      Warnings1 = filter_warnings(Warnings, Codeserver),
+      send_warnings(State#analysis_state.parent, Warnings1),
+      State#analysis_state{plt = NewMiniPlt, doc_plt = NewDocPlt}
+    end.
 
 %%--------------------------------------------------------------------
 %% Build the callgraph and fill the codeserver.
@@ -562,8 +587,9 @@ is_ok_fun({_Filename, _Line, {_M, _F, _A} = MFA}, Codeserver) ->
 is_ok_tag(Tag, {_F, _L, MorMFA}, Codeserver) ->
   not dialyzer_utils:is_suppressed_tag(MorMFA, Tag, Codeserver).
   
-send_analysis_done(Parent, Plt, DocPlt) ->
-  Parent ! {self(), done, Plt, DocPlt},
+send_analysis_done(Parent, MiniPlt, DocPlt) ->
+  ok = dialyzer_plt:give_away(MiniPlt, Parent),
+  Parent ! {self(), done, MiniPlt, DocPlt},
   ok.
 
 send_ext_calls(_Parent, none) ->
@@ -576,7 +602,7 @@ send_ext_types(Parent, ExtTypes) ->
   Parent ! {self(), ext_types, ExtTypes},
   ok.
 
-send_codeserver_plt(Parent, CServer, Plt ) ->
+send_codeserver_plt(Parent, CServer, Plt) ->
   Parent ! {self(), cserver, CServer, Plt},
   ok.
 
@@ -595,14 +621,14 @@ format_bad_calls([{{_, _, _}, {_, module_info, A}}|Left], CodeServer, Acc)
 format_bad_calls([{FromMFA, {M, F, A} = To}|Left], CodeServer, Acc) ->
   {_Var, FunCode} = dialyzer_codeserver:lookup_mfa_code(FromMFA, CodeServer),
   Msg = {call_to_missing, [M, F, A]},
-  {File, Line} = find_call_file_and_line(FunCode, To),
+  {File, Line} = find_call_file_and_line(FromMFA, FunCode, To, CodeServer),
   WarningInfo = {File, Line, FromMFA},
   NewAcc = [{?WARN_CALLGRAPH, WarningInfo, Msg}|Acc],
   format_bad_calls(Left, CodeServer, NewAcc);
 format_bad_calls([], _CodeServer, Acc) ->
   Acc.
 
-find_call_file_and_line(Tree, MFA) ->
+find_call_file_and_line({Module, _, _}, Tree, MFA, CodeServer) ->
   Fun =
     fun(SubTree, Acc) ->
 	case cerl:is_c_call(SubTree) of
@@ -615,7 +641,7 @@ find_call_file_and_line(Tree, MFA) ->
 		case {cerl:concrete(M), cerl:concrete(F), A} of
 		  MFA ->
 		    Ann = cerl:get_ann(SubTree),
-		    [{get_file(Ann), get_line(Ann)}|Acc];
+		    [{get_file(CodeServer, Module, Ann), get_line(Ann)}|Acc];
 		  {erlang, make_fun, 3} ->
 		    [CA1, CA2, CA3] = cerl:call_args(SubTree),
 		    case
@@ -631,7 +657,8 @@ find_call_file_and_line(Tree, MFA) ->
 			of
 			  MFA ->
 			    Ann = cerl:get_ann(SubTree),
-			    [{get_file(Ann), get_line(Ann)}|Acc];
+			    [{get_file(CodeServer, Module, Ann),
+                              get_line(Ann)}|Acc];
 			  _ ->
 			    Acc
 			end;
@@ -651,8 +678,10 @@ get_line([Line|_]) when is_integer(Line) -> Line;
 get_line([_|Tail]) -> get_line(Tail);
 get_line([]) -> -1.
 
-get_file([{file, File}|_]) -> File;
-get_file([_|Tail]) -> get_file(Tail).
+get_file(Codeserver, Module, [{file, FakeFile}|_]) ->
+  dialyzer_codeserver:translate_fake_file(Codeserver, Module, FakeFile);
+get_file(Codeserver, Module, [_|Tail]) ->
+  get_file(Codeserver, Module, Tail).
 
 -spec dump_callgraph(dialyzer_callgraph:callgraph(), #analysis_state{}, #analysis{}) ->
   'ok'.
diff --git a/lib/dialyzer/src/dialyzer_behaviours.erl b/lib/dialyzer/src/dialyzer_behaviours.erl
index e79a5d1cd9..d380ab2a50 100644
--- a/lib/dialyzer/src/dialyzer_behaviours.erl
+++ b/lib/dialyzer/src/dialyzer_behaviours.erl
@@ -55,9 +55,9 @@ check_callbacks(Module, Attrs, Records, Plt, Codeserver) ->
     _ ->
       MFA = {Module,module_info,0},
       {_Var,Code} = dialyzer_codeserver:lookup_mfa_code(MFA, Codeserver),
-      File = get_file(cerl:get_ann(Code)),
+      File = get_file(Codeserver, Module, cerl:get_ann(Code)),
       State = #state{plt = Plt, filename = File, behlines = BehLines,
-		     codeserver = Codeserver, records = Records},
+                     codeserver = Codeserver, records = Records},
       Warnings = get_warnings(Module, Behaviours, State),
       [add_tag_warning_info(Module, W, State) || W <- Warnings]
   end.
@@ -206,12 +206,15 @@ add_tag_warning_info(Module, {_Tag, [_B, Fun, Arity|_R]} = Warn, State) ->
     dialyzer_codeserver:lookup_mfa_code({Module, Fun, Arity},
 					State#state.codeserver),
   Anns = cerl:get_ann(FunCode),
-  WarningInfo = {get_file(Anns), get_line(Anns), {Module, Fun, Arity}},
+  File = get_file(State#state.codeserver, Module, Anns),
+  WarningInfo = {File, get_line(Anns), {Module, Fun, Arity}},
   {?WARN_BEHAVIOUR, WarningInfo, Warn}.
 
 get_line([Line|_]) when is_integer(Line) -> Line;
 get_line([_|Tail]) -> get_line(Tail);
 get_line([]) -> -1.
 
-get_file([{file, File}|_]) -> File;
-get_file([_|Tail]) -> get_file(Tail).
+get_file(Codeserver, Module, [{file, FakeFile}|_]) ->
+  dialyzer_codeserver:translate_fake_file(Codeserver, Module, FakeFile);
+get_file(Codeserver, Module, [_|Tail]) ->
+  get_file(Codeserver, Module, Tail).
diff --git a/lib/dialyzer/src/dialyzer_callgraph.erl b/lib/dialyzer/src/dialyzer_callgraph.erl
index 227ee2a892..68f3d7a240 100644
--- a/lib/dialyzer/src/dialyzer_callgraph.erl
+++ b/lib/dialyzer/src/dialyzer_callgraph.erl
@@ -112,7 +112,11 @@
 
 -opaque callgraph() :: #callgraph{}.
 
--type active_digraph() :: {'d', digraph:graph()} | {'e', ets:tid(), ets:tid()}.
+-type active_digraph() :: {'d', digraph:graph()}
+                        | {'e',
+                           Out :: ets:tid(),
+                           In :: ets:tid(),
+                           Map :: ets:tid()}.
 
 %%----------------------------------------------------------------------
 
@@ -241,24 +245,30 @@ find_non_local_calls([], Set) ->
 
 -spec get_depends_on(scc() | module(), callgraph()) -> [scc()].
 
-get_depends_on(SCC, #callgraph{active_digraph = {'e', Out, _In}}) ->
-  case ets_lookup_dict(SCC, Out) of
-    {ok, Value} -> Value;
-    error -> []
-  end;
+get_depends_on(SCC, #callgraph{active_digraph = {'e', Out, _In, Maps}}) ->
+  lookup_scc(SCC, Out, Maps);
 get_depends_on(SCC, #callgraph{active_digraph = {'d', DG}}) ->
   digraph:out_neighbours(DG, SCC).
 
 -spec get_required_by(scc() | module(), callgraph()) -> [scc()].
 
-get_required_by(SCC, #callgraph{active_digraph = {'e', _Out, In}}) ->
-  case ets_lookup_dict(SCC, In) of
-    {ok, Value} -> Value;
-    error -> []
-  end;
+get_required_by(SCC, #callgraph{active_digraph = {'e', _Out, In, Maps}}) ->
+  lookup_scc(SCC, In, Maps);
 get_required_by(SCC, #callgraph{active_digraph = {'d', DG}}) ->
   digraph:in_neighbours(DG, SCC).
 
+lookup_scc(SCC, Table, Maps) ->
+  case ets_lookup_dict({'scc', SCC}, Maps) of
+    {ok, SCCInt} ->
+      case ets_lookup_dict(SCCInt, Table) of
+        {ok, Ints} ->
+          [ets:lookup_element(Maps, Int, 2) || Int <- Ints];
+        error ->
+          []
+      end;
+    error -> []
+  end.
+
 %%----------------------------------------------------------------------
 %% Handling of modules & SCCs
 %%----------------------------------------------------------------------
@@ -575,9 +585,10 @@ digraph_delete(DG) ->
 
 active_digraph_delete({'d', DG}) ->
   digraph:delete(DG);
-active_digraph_delete({'e', Out, In}) ->
+active_digraph_delete({'e', Out, In, Maps}) ->
   ets:delete(Out),
-  ets:delete(In).
+  ets:delete(In),
+  ets:delete(Maps).
 
 digraph_edges(DG) ->
   digraph:edges(DG).
@@ -751,37 +762,28 @@ to_ps(#callgraph{} = CG, File, Args) ->
   ok.
 
 condensation(G) ->
-  SCs = digraph_utils:strong_components(G),
-  V2I = ets:new(condensation_v2i, []),
-  I2C = ets:new(condensation_i2c, []),
-  I2I = ets:new(condensation_i2i, [bag]),
-  CFun =
-    fun(SC, N) ->
-	lists:foreach(fun(V) -> true = ets:insert(V2I, {V,N}) end, SC),
-	true = ets:insert(I2C, {N, SC}),
-	N + 1
-    end,
-  lists:foldl(CFun, 1, SCs),
-  Fun1 =
-    fun({V1, V2}) ->
-        I1 = ets:lookup_element(V2I, V1, 2),
-        I2 = ets:lookup_element(V2I, V2, 2),
-	I1 =:= I2 orelse ets:insert(I2I, {I1, I2})
-    end,
-  lists:foreach(Fun1, digraph:edges(G)),
-  Fun3 =
-    fun({I1, I2}, {Out, In}) ->
-        SC1 = ets:lookup_element(I2C, I1, 2),
-        SC2 = ets:lookup_element(I2C, I2, 2),
-        {dict:append(SC1, SC2, Out), dict:append(SC2, SC1, In)}
-    end,
-  {OutDict, InDict} = ets:foldl(Fun3, {dict:new(), dict:new()}, I2I),
-  [OutETS, InETS] =
+  SCCs = digraph_utils:strong_components(G),
+  %% Assign unique numbers to SCCs:
+  Ints = lists:seq(1, length(SCCs)),
+  IntToSCC = lists:zip(Ints, SCCs),
+  IntScc = sofs:relation(IntToSCC, [{int, scc}]),
+  %% Subsitute strong components for vertices in edges using the
+  %% unique numbers:
+  C2V = sofs:relation([{SC, V} || SC <- SCCs, V <- SC], [{scc, v}]),
+  I2V = sofs:relative_product(IntScc, C2V), % [{v, int}]
+  Es = sofs:relation(digraph:edges(G), [{v, v}]),
+  R1 = sofs:relative_product(I2V, Es),
+  R2 = sofs:relative_product(I2V, sofs:converse(R1)),
+  %% Create in- and out-neighbours:
+  In = sofs:relation_to_family(sofs:strict_relation(R2)),
+  R3 = sofs:converse(R2),
+  Out = sofs:relation_to_family(sofs:strict_relation(R3)),
+  [OutETS, InETS, MapsETS] =
     [ets:new(Name,[{read_concurrency, true}]) ||
-      Name <- [callgraph_deps_out, callgraph_deps_in]],
-  ets:insert(OutETS, dict:to_list(OutDict)),
-  ets:insert(InETS, dict:to_list(InDict)),
-  ets:delete(V2I),
-  ets:delete(I2C),
-  ets:delete(I2I),
-  {{'e', OutETS, InETS}, SCs}.
+      Name <- [callgraph_deps_out, callgraph_deps_in, callgraph_scc_map]],
+  ets:insert(OutETS, sofs:to_external(Out)),
+  ets:insert(InETS, sofs:to_external(In)),
+  %% Create mappings from SCCs to unique integers, and the inverse:
+  ets:insert(MapsETS, lists:zip([{'scc', SCC} || SCC<- SCCs], Ints)),
+  ets:insert(MapsETS, IntToSCC),
+  {{'e', OutETS, InETS, MapsETS}, SCCs}.
diff --git a/lib/dialyzer/src/dialyzer_cl.erl b/lib/dialyzer/src/dialyzer_cl.erl
index b43711446b..158ee761af 100644
--- a/lib/dialyzer/src/dialyzer_cl.erl
+++ b/lib/dialyzer/src/dialyzer_cl.erl
@@ -630,8 +630,8 @@ cl_loop(State, LogCache) ->
     {BackendPid, warnings, Warnings} ->
       NewState = store_warnings(State, Warnings),
       cl_loop(NewState, LogCache);
-    {BackendPid, done, NewPlt, _NewDocPlt} ->
-      return_value(State, NewPlt);
+    {BackendPid, done, NewMiniPlt, _NewDocPlt} ->
+      return_value(State, NewMiniPlt);
     {BackendPid, ext_calls, ExtCalls} ->
       cl_loop(State#cl_state{external_calls = ExtCalls}, LogCache);
     {BackendPid, ext_types, ExtTypes} ->
@@ -647,6 +647,7 @@ cl_loop(State, LogCache) ->
       cl_error(State, Msg);
     _Other ->
       %% io:format("Received ~p\n", [_Other]),
+      %% Note: {BackendPid, cserver, CodeServer, Plt} is ignored.
       cl_loop(State, LogCache)
   end.
 
@@ -692,10 +693,13 @@ return_value(State = #cl_state{erlang_mode = ErlangMode,
 			       output_plt = OutputPlt,
 			       plt_info = PltInfo,
 			       stored_warnings = StoredWarnings},
-	     Plt) ->
+	     MiniPlt) ->
   case OutputPlt =:= none of
-    true -> ok;
-    false -> dialyzer_plt:to_file(OutputPlt, Plt, ModDeps, PltInfo)
+    true ->
+      dialyzer_plt:delete(MiniPlt);
+    false ->
+      Plt = dialyzer_plt:restore_full_plt(MiniPlt),
+      dialyzer_plt:to_file(OutputPlt, Plt, ModDeps, PltInfo)
   end,
   UnknownWarnings = unknown_warnings(State),
   RetValue =
diff --git a/lib/dialyzer/src/dialyzer_codeserver.erl b/lib/dialyzer/src/dialyzer_codeserver.erl
index dd383ea828..f53c713bfe 100644
--- a/lib/dialyzer/src/dialyzer_codeserver.erl
+++ b/lib/dialyzer/src/dialyzer_codeserver.erl
@@ -22,7 +22,9 @@
 -module(dialyzer_codeserver).
 
 -export([delete/1,
-	 finalize_contracts/3,
+	 store_temp_contracts/4,
+         give_away/2,
+	 finalize_contracts/1,
          finalize_exported_types/2,
 	 finalize_records/2,
 	 get_contracts/1,
@@ -31,7 +33,9 @@
 	 get_exports/1,
 	 get_records/1,
 	 get_next_core_label/1,
-	 get_temp_contracts/1,
+         get_temp_contracts/2,
+         contracts_modules/1,
+         store_contracts/4,
          get_temp_exported_types/1,
 	 get_temp_records/1,
 	 insert/3,
@@ -41,6 +45,7 @@
 	 is_exported/2,
 	 lookup_mod_code/2,
 	 lookup_mfa_code/2,
+	 lookup_mfa_var_label/2,
 	 lookup_mod_records/2,
 	 lookup_mod_contracts/2,
 	 lookup_mfa_contract/2,
@@ -49,21 +54,22 @@
 	 set_next_core_label/2,
 	 set_temp_records/2,
 	 store_temp_records/3,
-	 store_temp_contracts/4]).
+         translate_fake_file/3]).
 
--export_type([codeserver/0, fun_meta_info/0]).
+-export_type([codeserver/0, fun_meta_info/0, contracts/0]).
 
 -include("dialyzer.hrl").
 
 %%--------------------------------------------------------------------
 
 -type dict_ets() :: ets:tid().
+-type map_ets()  :: ets:tid().
 -type  set_ets() :: ets:tid().
 
 -type types()         :: erl_types:type_table().
--type mod_records()   :: dict:dict(module(), types()).
+-type mod_records()   :: erl_types:mod_records().
 
--type contracts()     :: dict:dict(mfa(),dialyzer_contracts:file_contract()).
+-type contracts()     :: #{mfa() => dialyzer_contracts:file_contract()}.
 -type mod_contracts() :: dict:dict(module(), contracts()).
 
 %% A property-list of data compiled from -compile and -dialyzer attributes.
@@ -74,16 +80,16 @@
 
 -record(codeserver, {next_core_label = 0 :: label(),
 		     code		 :: dict_ets(),
-                     exported_types      :: set_ets() | 'undefined', % set(mfa())
-		     records             :: dict_ets() | 'undefined',
-		     contracts           :: dict_ets() | 'undefined',
-		     callbacks           :: dict_ets() | 'undefined',
+                     exported_types      :: set_ets(), % set(mfa())
+		     records             :: map_ets(),
+		     contracts           :: map_ets(),
+		     callbacks           :: map_ets(),
                      fun_meta_info       :: dict_ets(), % {mfa(), meta_info()}
 		     exports             :: 'clean' | set_ets(), % set(mfa())
                      temp_exported_types :: 'clean' | set_ets(), % set(mfa())
-		     temp_records        :: 'clean' | dict_ets(),
-		     temp_contracts      :: 'clean' | dict_ets(),
-		     temp_callbacks      :: 'clean' | dict_ets()
+		     temp_records        :: 'clean' | map_ets(),
+		     temp_contracts      :: 'clean' | map_ets(),
+		     temp_callbacks      :: 'clean' | map_ets()
 		    }).
 
 -opaque codeserver() :: #codeserver{}.
@@ -97,7 +103,7 @@ ets_dict_find(Key, Table) ->
     _:_ -> error
   end.
 
-ets_dict_store(Key, Element, Table) ->
+ets_map_store(Key, Element, Table) ->
   true = ets:insert(Table, {Key, Element}),
   Table.
 
@@ -121,9 +127,6 @@ ets_set_to_set(Table) ->
   Fold = fun({E}, Set) -> sets:add_element(E, Set) end,
   ets:foldl(Fold, sets:new(), Table).
 
-ets_read_concurrent_table(Name) ->
-  ets:new(Name, [{read_concurrency, true}]).
-
 %%--------------------------------------------------------------------
 
 -spec new() -> codeserver().
@@ -131,6 +134,13 @@ ets_read_concurrent_table(Name) ->
 new() ->
   CodeOptions = [compressed, public, {read_concurrency, true}],
   Code = ets:new(dialyzer_codeserver_code, CodeOptions),
+  ReadOptions = [compressed, {read_concurrency, true}],
+  [Contracts, Callbacks, Records, ExportedTypes] =
+    [ets:new(Name, ReadOptions) ||
+      Name <- [dialyzer_codeserver_contracts,
+               dialyzer_codeserver_callbacks,
+               dialyzer_codeserver_records,
+               dialyzer_codeserver_exported_types]],
   TempOptions = [public, {write_concurrency, true}],
   [Exports, FunMetaInfo, TempExportedTypes, TempRecords, TempContracts,
    TempCallbacks] =
@@ -143,6 +153,10 @@ new() ->
   #codeserver{code                = Code,
 	      exports             = Exports,
               fun_meta_info       = FunMetaInfo,
+              exported_types      = ExportedTypes,
+              records             = Records,
+              contracts           = Contracts,
+              callbacks           = Callbacks,
 	      temp_exported_types = TempExportedTypes,
 	      temp_records        = TempRecords,
 	      temp_contracts      = TempContracts,
@@ -163,13 +177,15 @@ insert(Mod, ModCode, CS) ->
   Exports = cerl:module_exports(ModCode),
   Attrs = cerl:module_attrs(ModCode),
   Defs = cerl:module_defs(ModCode),
+  {Files, SmallDefs} = compress_file_anno(Defs),
   As = cerl:get_ann(ModCode),
   Funs =
     [{{Mod, cerl:fname_id(Var), cerl:fname_arity(Var)},
-      Val} || Val = {Var, _Fun} <- Defs],
-  Keys = [Key || {Key, _Value} <- Funs],
+      Val, {Var, cerl_trees:get_label(Fun)}} || Val = {Var, Fun} <- SmallDefs],
+  Keys = [Key || {Key, _Value, _Label} <- Funs],
   ModEntry = {Mod, {Name, Exports, Attrs, Keys, As}},
-  true = ets:insert(CS#codeserver.code, [ModEntry|Funs]),
+  ModFileEntry = {{mod, Mod}, Files},
+  true = ets:insert(CS#codeserver.code, [ModEntry, ModFileEntry|Funs]),
   CS.
 
 -spec get_temp_exported_types(codeserver()) -> sets:set(mfa()).
@@ -213,12 +229,12 @@ get_exports(#codeserver{exports = Exports}) ->
 
 -spec finalize_exported_types(sets:set(mfa()), codeserver()) -> codeserver().
 
-finalize_exported_types(Set, CS) ->
-  ExportedTypes = ets_read_concurrent_table(dialyzer_codeserver_exported_types),
+finalize_exported_types(Set,
+                        #codeserver{exported_types = ExportedTypes,
+                                    temp_exported_types = TempETypes} = CS) ->
   true = ets_set_insert_set(Set, ExportedTypes),
-  TempExpTypes = CS#codeserver.temp_exported_types,
-  true = ets:delete(TempExpTypes),
-  CS#codeserver{exported_types = ExportedTypes, temp_exported_types = clean}.
+  true = ets:delete(TempETypes),
+  CS#codeserver{temp_exported_types = clean}.
 
 -spec lookup_mod_code(atom(), codeserver()) -> cerl:c_module().
 
@@ -230,6 +246,11 @@ lookup_mod_code(Mod, CS) when is_atom(Mod) ->
 lookup_mfa_code({_M, _F, _A} = MFA, CS) ->
   table__lookup(CS#codeserver.code, MFA).
 
+-spec lookup_mfa_var_label(mfa(), codeserver()) -> {cerl:c_var(), label()}.
+
+lookup_mfa_var_label({_M, _F, _A} = MFA, CS) ->
+  ets:lookup_element(CS#codeserver.code, MFA, 3).
+
 -spec get_next_core_label(codeserver()) -> label().
 
 get_next_core_label(#codeserver{next_core_label = NCL}) ->
@@ -244,8 +265,8 @@ set_next_core_label(NCL, CS) ->
 
 lookup_mod_records(Mod, #codeserver{records = RecDict}) when is_atom(Mod) ->
   case ets_dict_find(Mod, RecDict) of
-    error -> dict:new();
-    {ok, Dict} -> Dict
+    error -> maps:new();
+    {ok, Map} -> Map
   end.
 
 -spec get_records(codeserver()) -> mod_records().
@@ -255,11 +276,11 @@ get_records(#codeserver{records = RecDict}) ->
 
 -spec store_temp_records(module(), types(), codeserver()) -> codeserver().
 
-store_temp_records(Mod, Dict, #codeserver{temp_records = TempRecDict} = CS)
+store_temp_records(Mod, Map, #codeserver{temp_records = TempRecDict} = CS)
   when is_atom(Mod) ->
-  case dict:size(Dict) =:= 0 of
+  case maps:size(Map) =:= 0 of
     true -> CS;
-    false -> CS#codeserver{temp_records = ets_dict_store(Mod, Dict, TempRecDict)}
+    false -> CS#codeserver{temp_records = ets_map_store(Mod, Map, TempRecDict)}
   end.
 
 -spec get_temp_records(codeserver()) -> mod_records().
@@ -277,20 +298,20 @@ set_temp_records(Dict, CS) ->
 
 -spec finalize_records(mod_records(), codeserver()) -> codeserver().
 
-finalize_records(Dict, CS) ->
-  true = ets:delete(CS#codeserver.temp_records),
-  Records = ets_read_concurrent_table(dialyzer_codeserver_records),
+finalize_records(Dict, #codeserver{temp_records = TmpRecords,
+                                   records = Records} = CS) ->
+  true = ets:delete(TmpRecords),
   true = ets_dict_store_dict(Dict, Records),
-  CS#codeserver{records = Records, temp_records = clean}.
+  CS#codeserver{temp_records = clean}.
 
 -spec lookup_mod_contracts(atom(), codeserver()) -> contracts().
 
 lookup_mod_contracts(Mod, #codeserver{contracts = ContDict})
   when is_atom(Mod) ->
   case ets_dict_find(Mod, ContDict) of
-    error -> dict:new();
+    error -> maps:new();
     {ok, Keys} ->
-      dict:from_list([get_file_contract(Key, ContDict)|| Key <- Keys])
+      maps:from_list([get_file_contract(Key, ContDict)|| Key <- Keys])
   end.
 
 get_file_contract(Key, ContDict) ->
@@ -323,48 +344,69 @@ get_callbacks(#codeserver{callbacks = CallbDict}) ->
 -spec store_temp_contracts(module(), contracts(), contracts(), codeserver()) ->
 	 codeserver().
 
-store_temp_contracts(Mod, SpecDict, CallbackDict,
+store_temp_contracts(Mod, SpecMap, CallbackMap,
 		     #codeserver{temp_contracts = Cn,
 				 temp_callbacks = Cb} = CS)
   when is_atom(Mod) ->
-  CS1 =
-    case dict:size(SpecDict) =:= 0 of
-      true -> CS;
-      false ->
-	CS#codeserver{temp_contracts = ets_dict_store(Mod, SpecDict, Cn)}
-    end,
-  case dict:size(CallbackDict) =:= 0 of
-    true -> CS1;
-    false ->
-      CS1#codeserver{temp_callbacks = ets_dict_store(Mod, CallbackDict, Cb)}
-  end.
-
--spec get_temp_contracts(codeserver()) -> {mod_contracts(), mod_contracts()}.
+  CS1 = CS#codeserver{temp_contracts = ets_map_store(Mod, SpecMap, Cn)},
+  CS1#codeserver{temp_callbacks = ets_map_store(Mod, CallbackMap, Cb)}.
 
-get_temp_contracts(#codeserver{temp_contracts = TempContDict,
-			       temp_callbacks = TempCallDict}) ->
-  {ets_dict_to_dict(TempContDict), ets_dict_to_dict(TempCallDict)}.
+-spec contracts_modules(codeserver()) -> [module()].
 
--spec finalize_contracts(mod_contracts(), mod_contracts(), codeserver()) ->
-                           codeserver().
+contracts_modules(#codeserver{temp_contracts = TempContTable}) ->
+  ets:select(TempContTable, [{{'$1', '$2'}, [], ['$1']}]).
 
-finalize_contracts(SpecDict, CallbackDict, CS)  ->
-  Contracts = ets_read_concurrent_table(dialyzer_codeserver_contracts),
-  Callbacks = ets_read_concurrent_table(dialyzer_codeserver_callbacks),
-  Contracts = dict:fold(fun decompose_spec_dict/3, Contracts, SpecDict),
-  Callbacks = dict:fold(fun decompose_cb_dict/3, Callbacks, CallbackDict),
-  CS#codeserver{contracts = Contracts, callbacks = Callbacks,
-		temp_contracts = clean, temp_callbacks = clean}.
+-spec store_contracts(module(), contracts(), contracts(), codeserver()) ->
+                         codeserver().
 
-decompose_spec_dict(Mod, Dict, Table) ->
-  Keys = dict:fetch_keys(Dict),
-  true = ets:insert(Table, dict:to_list(Dict)),
-  true = ets:insert(Table, {Mod, Keys}),
-  Table.
+store_contracts(Mod, SpecMap, CallbackMap, CS) ->
+  #codeserver{contracts = SpecDict, callbacks = CallbackDict} = CS,
+  Keys = maps:keys(SpecMap),
+  true = ets:insert(SpecDict, maps:to_list(SpecMap)),
+  true = ets:insert(SpecDict, {Mod, Keys}),
+  true = ets:insert(CallbackDict, maps:to_list(CallbackMap)),
+  CS.
 
-decompose_cb_dict(_Mod, Dict, Table) ->
-  true = ets:insert(Table, dict:to_list(Dict)),
-  Table.
+-spec get_temp_contracts(module(), codeserver()) ->
+                            {contracts(), contracts()}.
+
+get_temp_contracts(Mod, #codeserver{temp_contracts = TempContDict,
+                                    temp_callbacks = TempCallDict}) ->
+  [{Mod, Contracts}] = ets:lookup(TempContDict, Mod),
+  true = ets:delete(TempContDict, Mod),
+  [{Mod, Callbacks}] = ets:lookup(TempCallDict, Mod),
+  true = ets:delete(TempCallDict, Mod),
+  {Contracts, Callbacks}.
+
+-spec give_away(codeserver(), pid()) -> 'ok'.
+
+give_away(#codeserver{temp_records = TempRecords,
+                      temp_contracts = TempContracts,
+                      temp_callbacks = TempCallbacks,
+                      records = Records,
+                      contracts = Contracts,
+                      callbacks = Callbacks}, Pid) ->
+  _ = [true = ets:give_away(Table, Pid, any) ||
+        Table <- [TempRecords, TempContracts, TempCallbacks,
+                  Records, Contracts, Callbacks],
+        Table =/= clean],
+  ok.
+
+-spec finalize_contracts(codeserver()) -> codeserver().
+
+finalize_contracts(#codeserver{temp_contracts = TempContDict,
+                               temp_callbacks = TempCallDict} = CS)  ->
+  true = ets:delete(TempContDict),
+  true = ets:delete(TempCallDict),
+  CS#codeserver{temp_contracts = clean, temp_callbacks = clean}.
+
+-spec translate_fake_file(codeserver(), module(), file:filename()) ->
+                             file:filename().
+
+translate_fake_file(#codeserver{code = Code}, Module, FakeFile) ->
+  Files = ets:lookup_element(Code, {mod, Module}, 2),
+  {FakeFile, File} = lists:keyfind(FakeFile, 1, Files),
+  File.
 
 table__lookup(TablePid, M) when is_atom(M) ->
   {Name, Exports, Attrs, Keys, As} = ets:lookup_element(TablePid, M, 2),
@@ -372,3 +414,25 @@ table__lookup(TablePid, M) when is_atom(M) ->
   cerl:ann_c_module(As, Name, Exports, Attrs, Defs);
 table__lookup(TablePid, MFA) ->
   ets:lookup_element(TablePid, MFA, 2).
+
+compress_file_anno(Term) ->
+  {Files, SmallTerm} = compress_file_anno(Term, []),
+  {[{FakeFile, File} || {File, {file, FakeFile}} <- Files], SmallTerm}.
+
+compress_file_anno({file, F}, Fs) when is_list(F) ->
+  case lists:keyfind(F, 1, Fs) of
+    false ->
+      I = integer_to_list(length(Fs)),
+      FileI = {file, I},
+      NFs = [{F, FileI}|Fs],
+      {NFs, FileI};
+    {F, FileI} -> {Fs, FileI}
+  end;
+compress_file_anno(T, Fs) when is_tuple(T) ->
+  {NFs, NL} = compress_file_anno(tuple_to_list(T), Fs),
+  {NFs, list_to_tuple(NL)};
+compress_file_anno([E|L], Fs) ->
+  {Fs1, NE} = compress_file_anno(E, Fs),
+  {NFs, NL} = compress_file_anno(L, Fs1),
+  {NFs, [NE|NL]};
+compress_file_anno(T, Fs) -> {Fs, T}.
diff --git a/lib/dialyzer/src/dialyzer_contracts.erl b/lib/dialyzer/src/dialyzer_contracts.erl
index 7cc4a9d3eb..2078e58ce8 100644
--- a/lib/dialyzer/src/dialyzer_contracts.erl
+++ b/lib/dialyzer/src/dialyzer_contracts.erl
@@ -24,7 +24,7 @@
 	 get_contract_return/2,
 	 %% get_contract_signature/1,
 	 is_overloaded/1,
-	 process_contract_remote_types/1,
+	 process_contract_remote_types/2,
 	 store_tmp_contract/5]).
 
 -export_type([file_contract/0, plt_contracts/0]).
@@ -139,14 +139,13 @@ sequence([], _Delimiter) -> "";
 sequence([H], _Delimiter) -> H;
 sequence([H|T], Delimiter) -> H ++ Delimiter ++ sequence(T, Delimiter).
 
--spec process_contract_remote_types(dialyzer_codeserver:codeserver()) ->
-	  dialyzer_codeserver:codeserver().
+-spec process_contract_remote_types(dialyzer_codeserver:codeserver(),
+                                    erl_types:mod_records()) ->
+                                       dialyzer_codeserver:codeserver().
 
-process_contract_remote_types(CodeServer) ->
-  {TmpContractDict, TmpCallbackDict} =
-    dialyzer_codeserver:get_temp_contracts(CodeServer),
+process_contract_remote_types(CodeServer, RecordDict) ->
+  Mods = dialyzer_codeserver:contracts_modules(CodeServer),
   ExpTypes = dialyzer_codeserver:get_exported_types(CodeServer),
-  RecordDict = dialyzer_codeserver:get_records(CodeServer),
   ContractFun =
     fun({{_M, _F, _A}=MFA, {File, TmpContract, Xtra}}, C0) ->
         #tmp_contract{contract_funs = CFuns, forms = Forms} = TmpContract,
@@ -158,20 +157,21 @@ process_contract_remote_types(CodeServer) ->
         {{MFA, {File, Contract, Xtra}}, C2}
     end,
   ModuleFun =
-    fun({ModuleName, ContractDict}, C3) ->
-        {NewContractList, C4} =
-          lists:mapfoldl(ContractFun, C3, dict:to_list(ContractDict)),
-        {{ModuleName, dict:from_list(NewContractList)}, C4}
+    fun(ModuleName) ->
+        Cache = erl_types:cache__new(),
+        {ContractMap, CallbackMap} =
+          dialyzer_codeserver:get_temp_contracts(ModuleName, CodeServer),
+        {NewContractList, Cache1} =
+          lists:mapfoldl(ContractFun, Cache, maps:to_list(ContractMap)),
+        {NewCallbackList, _NewCache} =
+          lists:mapfoldl(ContractFun, Cache1, maps:to_list(CallbackMap)),
+        dialyzer_codeserver:store_contracts(ModuleName,
+                                            maps:from_list(NewContractList),
+                                            maps:from_list(NewCallbackList),
+                                            CodeServer)
     end,
-  Cache = erl_types:cache__new(),
-  {NewContractList, C5} =
-    lists:mapfoldl(ModuleFun, Cache, dict:to_list(TmpContractDict)),
-  {NewCallbackList, _C6} =
-    lists:mapfoldl(ModuleFun, C5, dict:to_list(TmpCallbackDict)),
-  NewContractDict = dict:from_list(NewContractList),
-  NewCallbackDict = dict:from_list(NewCallbackList),
-  dialyzer_codeserver:finalize_contracts(NewContractDict, NewCallbackDict,
-                                         CodeServer).
+  lists:foreach(ModuleFun, Mods),
+  dialyzer_codeserver:finalize_contracts(CodeServer).
 
 -type opaques_fun() :: fun((module()) -> [erl_types:erl_type()]).
 
@@ -390,7 +390,7 @@ solve_constraints(Contract, Call, Constraints) ->
   %%  ?debug("Inf: ~s\n", [erl_types:t_to_string(Inf)]),
   %%  erl_types:t_assign_variables_to_subtype(Contract, Inf).
 
--type contracts() :: dict:dict(mfa(),dialyzer_contracts:file_contract()).
+-type contracts() :: dialyzer_codeserver:contracts().
 
 %% Checks the contracts for functions that are not implemented
 -spec contracts_without_fun(contracts(), [_], dialyzer_callgraph:callgraph()) ->
@@ -400,12 +400,12 @@ contracts_without_fun(Contracts, AllFuns0, Callgraph) ->
   AllFuns1 = [{dialyzer_callgraph:lookup_name(Label, Callgraph), Arity}
 	      || {Label, Arity} <- AllFuns0],
   AllFuns2 = [{M, F, A} || {{ok, {M, F, _}}, A} <- AllFuns1],
-  AllContractMFAs = dict:fetch_keys(Contracts),
+  AllContractMFAs = maps:keys(Contracts),
   ErrorContractMFAs = AllContractMFAs -- AllFuns2,
   [warn_spec_missing_fun(MFA, Contracts) || MFA <- ErrorContractMFAs].
 
 warn_spec_missing_fun({M, F, A} = MFA, Contracts) ->
-  {{File, Line}, _Contract, _Xtra} = dict:fetch(MFA, Contracts),
+  {{File, Line}, _Contract, _Xtra} = maps:get(MFA, Contracts),
   WarningInfo = {File, Line, MFA},
   {?WARN_CONTRACT_SYNTAX, WarningInfo, {spec_missing_fun, [M, F, A]}}.
 
@@ -438,11 +438,11 @@ insert_constraints([], Map) -> Map.
 -spec store_tmp_contract(mfa(), file_line(), spec_data(), contracts(), types()) ->
         contracts().
 
-store_tmp_contract(MFA, FileLine, {TypeSpec, Xtra}, SpecDict, RecordsDict) ->
+store_tmp_contract(MFA, FileLine, {TypeSpec, Xtra}, SpecMap, RecordsDict) ->
   %% io:format("contract from form: ~p\n", [TypeSpec]),
   TmpContract = contract_from_form(TypeSpec, MFA, RecordsDict, FileLine),
   %% io:format("contract: ~p\n", [TmpContract]),
-  dict:store(MFA, {FileLine, TmpContract, Xtra}, SpecDict).
+  maps:put(MFA, {FileLine, TmpContract, Xtra}, SpecMap).
 
 contract_from_form(Forms, MFA, RecDict, FileLine) ->
   {CFuns, Forms1} = contract_from_form(Forms, MFA, RecDict, FileLine, [], []),
@@ -670,7 +670,7 @@ get_invalid_contract_warnings(Modules, CodeServer, Plt, FindOpaques) ->
 
 get_invalid_contract_warnings_modules([Mod|Mods], CodeServer, Plt, FindOpaques, Acc) ->
   Contracts1 = dialyzer_codeserver:lookup_mod_contracts(Mod, CodeServer),
-  Contracts2 = dict:to_list(Contracts1),
+  Contracts2 = maps:to_list(Contracts1),
   Records = dialyzer_codeserver:lookup_mod_records(Mod, CodeServer),
   NewAcc = get_invalid_contract_warnings_funs(Contracts2, Plt, Records, FindOpaques, Acc),
   get_invalid_contract_warnings_modules(Mods, CodeServer, Plt, FindOpaques, NewAcc);
diff --git a/lib/dialyzer/src/dialyzer_dataflow.erl b/lib/dialyzer/src/dialyzer_dataflow.erl
index fdcf8269e4..f706ebfb02 100644
--- a/lib/dialyzer/src/dialyzer_dataflow.erl
+++ b/lib/dialyzer/src/dialyzer_dataflow.erl
@@ -522,7 +522,7 @@ handle_apply_or_call([{TypeOfApply, {Fun, Sig, Contr, LocalRet}}|Left],
     case is_race_analysis_enabled(State) of
       true ->
         Ann = cerl:get_ann(Tree),
-        File = get_file(Ann),
+        File = get_file(Ann, State),
         Line = abs(get_line(Ann)),
         dialyzer_races:store_race_call(Fun, ArgTypes, Args,
                                        {File, Line}, State);
@@ -3083,7 +3083,7 @@ state__add_warning(#state{warnings = Warnings, warning_mode = true} = State,
   Ann = cerl:get_ann(Tree),
   case Force of
     true ->
-      WarningInfo = {get_file(Ann),
+      WarningInfo = {get_file(Ann, State),
                      abs(get_line(Ann)),
                      State#state.curr_fun},
       Warn = {Tag, WarningInfo, Msg},
@@ -3093,7 +3093,9 @@ state__add_warning(#state{warnings = Warnings, warning_mode = true} = State,
       case is_compiler_generated(Ann) of
         true -> State;
         false ->
-          WarningInfo = {get_file(Ann), get_line(Ann), State#state.curr_fun},
+          WarningInfo = {get_file(Ann, State),
+                         get_line(Ann),
+                         State#state.curr_fun},
           Warn = {Tag, WarningInfo, Msg},
           case Tag of
             ?WARN_CONTRACT_RANGE -> ok;
@@ -3492,6 +3494,12 @@ state__put_races(Races, State) ->
 state__records_only(#state{records = Records}) ->
   #state{records = Records}.
 
+-spec state__translate_file(file:filename(), state()) -> file:filename().
+
+state__translate_file(FakeFile, State) ->
+  #state{codeserver = CodeServer, module = Module} = State,
+  dialyzer_codeserver:translate_fake_file(CodeServer, Module, FakeFile).
+
 %%% ===========================================================================
 %%%
 %%%  Races
@@ -3563,9 +3571,11 @@ get_line([Line|_]) when is_integer(Line) -> Line;
 get_line([_|Tail]) -> get_line(Tail);
 get_line([]) -> -1.
 
-get_file([]) -> [];
-get_file([{file, File}|_]) -> File;
-get_file([_|Tail]) -> get_file(Tail).
+get_file([], _State) -> [];
+get_file([{file, FakeFile}|_], State) ->
+  state__translate_file(FakeFile, State);
+get_file([_|Tail], State) ->
+  get_file(Tail, State).
 
 is_compiler_generated(Ann) ->
   lists:member(compiler_generated, Ann) orelse (get_line(Ann) < 1).
diff --git a/lib/dialyzer/src/dialyzer_gui_wx.erl b/lib/dialyzer/src/dialyzer_gui_wx.erl
index 91f7fbe467..d1b955044b 100644
--- a/lib/dialyzer/src/dialyzer_gui_wx.erl
+++ b/lib/dialyzer/src/dialyzer_gui_wx.erl
@@ -498,8 +498,9 @@ gui_loop(#gui_state{backend_pid = BackendPid, doc_plt = DocPlt,
 	end,
       ExplanationPid = spawn_link(Fun),
       gui_loop(State#gui_state{expl_pid = ExplanationPid});
-    {BackendPid, done, _NewPlt, NewDocPlt} ->
+    {BackendPid, done, NewMiniPlt, NewDocPlt} ->
       message(State, "Analysis done"),
+      dialyzer_plt:delete(NewMiniPlt),
       config_gui_stop(State),
       gui_loop(State#gui_state{doc_plt = NewDocPlt});
     {'EXIT', BackendPid, {error, Reason}} ->
diff --git a/lib/dialyzer/src/dialyzer_plt.erl b/lib/dialyzer/src/dialyzer_plt.erl
index 64b10af1ba..37c22fef48 100644
--- a/lib/dialyzer/src/dialyzer_plt.erl
+++ b/lib/dialyzer/src/dialyzer_plt.erl
@@ -51,7 +51,9 @@
 	 get_specs/4,
 	 to_file/4,
 	 get_mini_plt/1,
-	 restore_full_plt/2
+	 restore_full_plt/1,
+         delete/1,
+         give_away/2
 	]).
 
 %% Debug utilities
@@ -75,14 +77,16 @@
 %%----------------------------------------------------------------------
 
 -record(plt, {info           = table_new() :: dict:dict(),
-	      types          = table_new() :: dict:dict(),
+	      types          = table_new() :: erl_types:mod_records(),
 	      contracts      = table_new() :: dict:dict(),
 	      callbacks      = table_new() :: dict:dict(),
               exported_types = sets:new()  :: sets:set()}).
 
 -record(mini_plt, {info      :: ets:tid(),
+                   types     :: ets:tid(),
 		   contracts :: ets:tid(),
-		   callbacks :: ets:tid()
+		   callbacks :: ets:tid(),
+                   exported_types :: ets:tid()
 		  }).
 
 -opaque plt() :: #plt{} | #mini_plt{}.
@@ -123,6 +127,10 @@ delete_module(#plt{info = Info, types = Types,
 
 -spec delete_list(plt(), [mfa() | integer()]) -> plt().
 
+delete_list(#mini_plt{info = Info,
+                      contracts = Contracts}=Plt, List) ->
+  Plt#mini_plt{info = ets_table_delete_list(Info, List),
+               contracts = ets_table_delete_list(Contracts, List)};
 delete_list(#plt{info = Info, types = Types,
 		 contracts = Contracts,
 		 callbacks = Callbacks,
@@ -176,7 +184,7 @@ lookup(Plt, Label) when is_integer(Label) ->
 lookup_1(#mini_plt{info = Info}, MFAorLabel) ->
   ets_table_lookup(Info, MFAorLabel).
 
--spec insert_types(plt(), dict:dict()) -> plt().
+-spec insert_types(plt(), erl_types:mod_records()) -> plt().
 
 insert_types(PLT, Rec) ->
   PLT#plt{types = Rec}.
@@ -186,7 +194,7 @@ insert_types(PLT, Rec) ->
 insert_exported_types(PLT, Set) ->
   PLT#plt{exported_types = Set}.
 
--spec get_types(plt()) -> dict:dict().
+-spec get_types(plt()) -> erl_types:mod_records().
 
 get_types(#plt{types = Types}) ->
   Types.
@@ -246,8 +254,10 @@ from_file(FileName, ReturnInfo) ->
 	  Msg = io_lib:format("Old PLT file ~s\n", [FileName]),
 	  plt_error(Msg);
 	ok ->
+          Types = [{Mod, maps:from_list(dict:to_list(Types))} ||
+                    {Mod, Types} <- dict:to_list(Rec#file_plt.types)],
 	  Plt = #plt{info = Rec#file_plt.info,
-		     types = Rec#file_plt.types,
+		     types = dict:from_list(Types),
 		     contracts = Rec#file_plt.contracts,
 		     callbacks = Rec#file_plt.callbacks,
                      exported_types = Rec#file_plt.exported_types},
@@ -364,12 +374,14 @@ to_file(FileName,
 			  end,
 			  OldModDeps, ModDeps),
   ImplMd5 = compute_implementation_md5(),
+  FileTypes = dict:from_list([{Mod, dict:from_list(maps:to_list(MTypes))} ||
+                               {Mod, MTypes} <- dict:to_list(Types)]),
   Record = #file_plt{version = ?VSN,
 		     file_md5_list = MD5,
 		     info = Info,
 		     contracts = Contracts,
 		     callbacks = Callbacks,
-		     types = Types,
+		     types = FileTypes,
                      exported_types = ExpTypes,
 		     mod_deps = NewModDeps,
 		     implementation_md5 = ImplMd5},
@@ -503,32 +515,100 @@ init_md5_list_1(Md5List, [], Acc) ->
 
 -spec get_mini_plt(plt()) -> plt().
 
-get_mini_plt(#plt{info = Info, contracts = Contracts, callbacks = Callbacks}) ->
-  [ETSInfo, ETSContracts, ETSCallbacks] =
-    [ets:new(Name, [public]) || Name <- [plt_info, plt_contracts, plt_callbacks]],
+get_mini_plt(#plt{info = Info,
+                  types = Types,
+                  contracts = Contracts,
+                  callbacks = Callbacks,
+                  exported_types = ExpTypes}) ->
+  [ETSInfo, ETSTypes, ETSContracts, ETSCallbacks, ETSExpTypes] =
+    [ets:new(Name, [public]) ||
+      Name <- [plt_info, plt_types, plt_contracts, plt_callbacks,
+               plt_exported_types]],
   CallbackList = dict:to_list(Callbacks),
   CallbacksByModule =
     [{M, [Cb || {{M1,_,_},_} = Cb <- CallbackList, M1 =:= M]} ||
       M <- lists:usort([M || {{M,_,_},_} <- CallbackList])],
-  [true, true] =
+  [true, true, true] =
     [ets:insert(ETS, dict:to_list(Data)) ||
-      {ETS, Data} <- [{ETSInfo, Info}, {ETSContracts, Contracts}]],
+      {ETS, Data} <- [{ETSInfo, Info},
+                      {ETSTypes, Types},
+                      {ETSContracts, Contracts}]],
   true = ets:insert(ETSCallbacks, CallbacksByModule),
-  #mini_plt{info = ETSInfo, contracts = ETSContracts, callbacks = ETSCallbacks};
+  true = ets:insert(ETSExpTypes, [{ET} || ET <- sets:to_list(ExpTypes)]),
+  #mini_plt{info = ETSInfo,
+            types = ETSTypes,
+            contracts = ETSContracts,
+            callbacks = ETSCallbacks,
+            exported_types = ETSExpTypes};
 get_mini_plt(undefined) ->
   undefined.
 
--spec restore_full_plt(plt(), plt()) -> plt().
-
-restore_full_plt(#mini_plt{info = ETSInfo, contracts = ETSContracts}, Plt) ->
-  Info = dict:from_list(ets:tab2list(ETSInfo)),
-  Contracts = dict:from_list(ets:tab2list(ETSContracts)),
-  ets:delete(ETSContracts),
-  ets:delete(ETSInfo),
-  Plt#plt{info = Info, contracts = Contracts};
-restore_full_plt(undefined, undefined) ->
+-spec restore_full_plt(plt()) -> plt().
+
+restore_full_plt(#mini_plt{info = ETSInfo,
+                           types = ETSTypes,
+                           contracts = ETSContracts,
+                           callbacks = ETSCallbacks,
+                           exported_types = ETSExpTypes} = MiniPlt) ->
+  Info = dict:from_list(tab2list(ETSInfo)),
+  Contracts = dict:from_list(tab2list(ETSContracts)),
+  Types = dict:from_list(tab2list(ETSTypes)),
+  Callbacks =
+    dict:from_list([Cb || {_M, Cbs} <- tab2list(ETSCallbacks), Cb <- Cbs]),
+  ExpTypes = sets:from_list([E || {E} <- tab2list(ETSExpTypes)]),
+  ok = delete(MiniPlt),
+  #plt{info = Info,
+       types = Types,
+       contracts = Contracts,
+       callbacks = Callbacks,
+       exported_types = ExpTypes};
+restore_full_plt(undefined) ->
   undefined.
 
+-spec delete(plt()) -> 'ok'.
+
+delete(#mini_plt{info = ETSInfo,
+                 types = ETSTypes,
+                 contracts = ETSContracts,
+                 callbacks = ETSCallbacks,
+                 exported_types = ETSExpTypes}) ->
+  true = ets:delete(ETSContracts),
+  true = ets:delete(ETSTypes),
+  true = ets:delete(ETSInfo),
+  true = ets:delete(ETSCallbacks),
+  true = ets:delete(ETSExpTypes),
+  ok.
+
+-spec give_away(plt(), pid()) -> 'ok'.
+
+give_away(#mini_plt{info = ETSInfo,
+                    types = ETSTypes,
+                    contracts = ETSContracts,
+                    callbacks = ETSCallbacks,
+                    exported_types = ETSExpTypes},
+          Pid) ->
+  true = ets:give_away(ETSContracts, Pid, any),
+  true = ets:give_away(ETSTypes, Pid, any),
+  true = ets:give_away(ETSInfo, Pid, any),
+  true = ets:give_away(ETSCallbacks, Pid, any),
+  true = ets:give_away(ETSExpTypes, Pid, any),
+  ok.
+
+%% Somewhat slower than ets:tab2list(), but uses less memory.
+tab2list(T) ->
+  tab2list(ets:first(T), T, []).
+
+tab2list('$end_of_table', T, A) ->
+  case ets:first(T) of % no safe_fixtable()...
+    '$end_of_table' -> A;
+    Key -> tab2list(Key, T, A)
+  end;
+tab2list(Key, T, A) ->
+  Vs = ets:lookup(T, Key),
+  Key1 = ets:next(T, Key),
+  ets:delete(T, Key),
+  tab2list(Key1, T, Vs ++ A).
+
 %%---------------------------------------------------------------------------
 %% Edoc
 
@@ -600,6 +680,12 @@ table_delete_module1(Plt, Mod) ->
 table_delete_module2(Plt, Mod) ->
   dict:filter(fun(M, _Val) -> M =/= Mod end, Plt).
 
+ets_table_delete_list(Tab, [H|T]) ->
+  ets:delete(Tab, H),
+  ets_table_delete_list(Tab, T);
+ets_table_delete_list(Tab, []) ->
+  Tab.
+
 table_delete_list(Plt, [H|T]) ->
   table_delete_list(dict:erase(H, Plt), T);
 table_delete_list(Plt, []) ->
diff --git a/lib/dialyzer/src/dialyzer_succ_typings.erl b/lib/dialyzer/src/dialyzer_succ_typings.erl
index df12796dd4..3c90f46e95 100644
--- a/lib/dialyzer/src/dialyzer_succ_typings.erl
+++ b/lib/dialyzer/src/dialyzer_succ_typings.erl
@@ -89,7 +89,7 @@ analyze_callgraph(Callgraph, Plt, Codeserver, TimingServer, Solvers, Parent) ->
   NewState =
     init_state_and_get_success_typings(Callgraph, Plt, Codeserver,
 				       TimingServer, Solvers, Parent),
-  dialyzer_plt:restore_full_plt(NewState#st.plt, Plt).
+  NewState#st.plt.
 
 %%--------------------------------------------------------------------
 
@@ -104,6 +104,7 @@ init_state_and_get_success_typings(Callgraph, Plt, Codeserver,
 
 get_refined_success_typings(SCCs, #st{callgraph = Callgraph,
 				      timing_server = TimingServer} = State) ->
+  erlang:garbage_collect(),
   case find_succ_typings(SCCs, State) of
     {fixpoint, State1} -> State1;
     {not_fixpoint, NotFixpoint1, State1} ->
@@ -148,8 +149,8 @@ get_warnings(Callgraph, Plt, DocPlt, Codeserver,
     ?timing(TimingServer, "warning",
 	    get_warnings_from_modules(Mods, InitState, MiniDocPlt)),
   {postprocess_warnings(CWarns ++ ModWarns, Codeserver),
-   dialyzer_plt:restore_full_plt(MiniPlt, Plt),
-   dialyzer_plt:restore_full_plt(MiniDocPlt, DocPlt)}.
+   MiniPlt,
+   dialyzer_plt:restore_full_plt(MiniDocPlt)}.
 
 get_warnings_from_modules(Mods, State, DocPlt) ->
   #st{callgraph = Callgraph, codeserver = Codeserver,
@@ -167,10 +168,10 @@ collect_warnings(M, {Codeserver, Callgraph, Plt, DocPlt}) ->
   %% Check if there are contracts for functions that do not exist
   Warnings1 =
     dialyzer_contracts:contracts_without_fun(Contracts, AllFuns, Callgraph),
+  Attrs = cerl:module_attrs(ModCode),
   {Warnings2, FunTypes} =
     dialyzer_dataflow:get_warnings(ModCode, Plt, Callgraph, Codeserver,
 				   Records),
-  Attrs = cerl:module_attrs(ModCode),
   Warnings3 =
     dialyzer_behaviours:check_callbacks(M, Attrs, Records, Plt, Codeserver),
   DocPlt = insert_into_doc_plt(FunTypes, Callgraph, DocPlt),
@@ -255,7 +256,7 @@ refine_one_module(M, {CodeServer, Callgraph, Plt, _Solvers}) ->
   NewFunTypes =
     dialyzer_dataflow:get_fun_types(ModCode, Plt, Callgraph, CodeServer, Records),
   Contracts1 = dialyzer_codeserver:lookup_mod_contracts(M, CodeServer),
-  Contracts = orddict:from_list(dict:to_list(Contracts1)),
+  Contracts = orddict:from_list(maps:to_list(Contracts1)),
   FindOpaques = find_opaques_fun(Records),
   DecoratedFunTypes =
     decorate_succ_typings(Contracts, Callgraph, NewFunTypes, FindOpaques),
@@ -341,21 +342,25 @@ find_succ_typings(SCCs, #st{codeserver = Codeserver, callgraph = Callgraph,
 
 -spec find_succ_types_for_scc(scc(), typesig_init_data()) -> [mfa_or_funlbl()].
 
-find_succ_types_for_scc(SCC, {Codeserver, Callgraph, Plt, Solvers}) ->
-  SCC_Info = [{MFA, 
-	       dialyzer_codeserver:lookup_mfa_code(MFA, Codeserver),
-	       dialyzer_codeserver:lookup_mod_records(M, Codeserver)}
-	      || {M, _, _} = MFA <- SCC],
+find_succ_types_for_scc(SCC0, {Codeserver, Callgraph, Plt, Solvers}) ->
+  SCC = [MFA || {_, _, _} = MFA <- SCC0],
   Contracts1 = [{MFA, dialyzer_codeserver:lookup_mfa_contract(MFA, Codeserver)}
-		|| {_, _, _} = MFA <- SCC],
+		|| MFA <- SCC],
   Contracts2 = [{MFA, Contract} || {MFA, {ok, Contract}} <- Contracts1],
   Contracts3 = orddict:from_list(Contracts2),
   Label = dialyzer_codeserver:get_next_core_label(Codeserver),
-  AllFuns = collect_fun_info([Fun || {_MFA, {_Var, Fun}, _Rec} <- SCC_Info]),
+  AllFuns = lists:append(
+              [begin
+                 {_Var, Fun} =
+                   dialyzer_codeserver:lookup_mfa_code(MFA, Codeserver),
+                 collect_fun_info([Fun])
+               end || MFA <- SCC]),
+  erlang:garbage_collect(),
   PropTypes = get_fun_types_from_plt(AllFuns, Callgraph, Plt),
   %% Assume that the PLT contains the current propagated types
-  FunTypes = dialyzer_typesig:analyze_scc(SCC_Info, Label, Callgraph,
-                                          Plt, PropTypes, Solvers),
+  FunTypes = dialyzer_typesig:analyze_scc(SCC, Label, Callgraph,
+                                          Codeserver, Plt, PropTypes,
+                                          Solvers),
   AllFunSet = sets:from_list([X || {X, _} <- AllFuns]),
   FilteredFunTypes =
     dict:filter(fun(X, _) -> sets:is_element(X, AllFunSet) end, FunTypes),
diff --git a/lib/dialyzer/src/dialyzer_typesig.erl b/lib/dialyzer/src/dialyzer_typesig.erl
index 457db9df83..b33484bda4 100644
--- a/lib/dialyzer/src/dialyzer_typesig.erl
+++ b/lib/dialyzer/src/dialyzer_typesig.erl
@@ -22,7 +22,7 @@
 
 -module(dialyzer_typesig).
 
--export([analyze_scc/6]).
+-export([analyze_scc/7]).
 -export([get_safe_underapprox/2]).
 
 %%-import(helper, %% 'helper' could be any module doing sanity checks...
@@ -94,10 +94,9 @@
 
 -type types() :: erl_types:type_table().
 
--type typesig_scc()    :: [{mfa(), {cerl:c_var(), cerl:c_fun()}, types()}].
 -type typesig_funmap() :: #{type_var() => type_var()}.
 
--type prop_types() :: dict:dict(label(), types()).
+-type prop_types() :: dict:dict(label(), erl_types:erl_type()).
 
 -record(state, {callgraph                :: dialyzer_callgraph:callgraph()
                                           | 'undefined',
@@ -114,7 +113,7 @@
 		plt                      :: dialyzer_plt:plt()
                                           | 'undefined',
 		prop_types  = dict:new() :: prop_types(),
-		records     = dict:new() :: types(),
+		records     = maps:new() :: types(),
 		scc         = []         :: ordsets:ordset(type_var()),
 		mfas                     :: [mfa()],
                 solvers     = []         :: [solver()]
@@ -153,11 +152,10 @@
 %%-----------------------------------------------------------------------------
 %% Analysis of strongly connected components.
 %%
-%% analyze_scc(SCC, NextLabel, CallGraph, PLT, PropTypes, Solvers) -> FunTypes
+%% analyze_scc(SCC, NextLabel, CallGraph, CodeServer,
+%%             PLT, PropTypes, Solvers) -> FunTypes
 %%
-%% SCC       - [{MFA, Def, Records}]
-%%             where Def = {Var, Fun} as in the Core Erlang module definitions.
-%%                   Records = dict(RecName, {Arity, [{FieldName, FieldType}]})
+%% SCC       - [{MFA}]
 %% NextLabel - An integer that is higher than any label in the code.
 %% CallGraph - A callgraph as produced by dialyzer_callgraph.erl
 %%             Note: The callgraph must have been built with all the
@@ -169,28 +167,27 @@
 %% Solvers   - User specified solvers.
 %%-----------------------------------------------------------------------------
 
--spec analyze_scc(typesig_scc(), label(),
+-spec analyze_scc([mfa()], label(),
 		  dialyzer_callgraph:callgraph(),
+                  dialyzer_codeserver:codeserver(),
 		  dialyzer_plt:plt(), prop_types(), [solver()]) -> prop_types().
 
-analyze_scc(SCC, NextLabel, CallGraph, Plt, PropTypes, Solvers0) ->
+analyze_scc(SCC, NextLabel, CallGraph, CServer, Plt, PropTypes, Solvers0) ->
   Solvers = solvers(Solvers0),
-  assert_format_of_scc(SCC),
-  State1 = new_state(SCC, NextLabel, CallGraph, Plt, PropTypes, Solvers),
-  DefSet = add_def_list([Var || {_MFA, {Var, _Fun}, _Rec} <- SCC], sets:new()),
-  State2 = traverse_scc(SCC, DefSet, State1),
+  State1 = new_state(SCC, NextLabel, CallGraph, CServer, Plt, PropTypes,
+                     Solvers),
+  DefSet = add_def_list(maps:values(State1#state.name_map), sets:new()),
+  ModRecs = [{M, dialyzer_codeserver:lookup_mod_records(M, CServer)} ||
+              M <- lists:usort([M || {M, _, _} <- SCC])],
+  State2 = traverse_scc(SCC, CServer, DefSet, ModRecs, State1),
   State3 = state__finalize(State2),
+  erlang:garbage_collect(),
   Funs = state__scc(State3),
   pp_constrs_scc(Funs, State3),
   constraints_to_dot_scc(Funs, State3),
   T = solve(Funs, State3),
   dict:from_list(maps:to_list(T)).
 
-assert_format_of_scc([{_MFA, {_Var, _Fun}, _Records}|Left]) ->
-  assert_format_of_scc(Left);
-assert_format_of_scc([]) ->
-  ok.
-
 solvers([]) -> [v2];
 solvers(Solvers) -> Solvers.
 
@@ -200,12 +197,14 @@ solvers(Solvers) -> Solvers.
 %%
 %% ============================================================================
 
-traverse_scc([{_MFA, Def, Rec}|Left], DefSet, AccState) ->
+traverse_scc([{M,_,_}=MFA|Left], Codeserver, DefSet, ModRecs, AccState) ->
+  Def = dialyzer_codeserver:lookup_mfa_code(MFA, Codeserver),
+  {M, Rec} = lists:keyfind(M, 1, ModRecs),
   TmpState1 = state__set_rec_dict(AccState, Rec),
   DummyLetrec = cerl:c_letrec([Def], cerl:c_atom(foo)),
   {NewAccState, _} = traverse(DummyLetrec, DefSet, TmpState1),
-  traverse_scc(Left, DefSet, NewAccState);
-traverse_scc([], _DefSet, AccState) ->
+  traverse_scc(Left, Codeserver, DefSet, ModRecs, NewAccState);
+traverse_scc([], _Codeserver, _DefSet, _ModRecs, AccState) ->
   AccState.
 
 traverse(Tree, DefinedVars, State) ->
@@ -2695,11 +2694,14 @@ pp_map(_S, _Map) ->
 %%
 %% ============================================================================
 
-new_state(SCC0, NextLabel, CallGraph, Plt, PropTypes, Solvers) ->
-  List = [{MFA, Var} || {MFA, {Var, _Fun}, _Rec} <- SCC0],
+new_state(MFAs, NextLabel, CallGraph, CServer, Plt, PropTypes, Solvers) ->
+  List_SCC =
+    [begin
+       {Var, Label} = dialyzer_codeserver:lookup_mfa_var_label(MFA, CServer),
+       {{MFA, Var}, t_var(Label)}
+   end || MFA <- MFAs],
+  {List, SCC} = lists:unzip(List_SCC),
   NameMap = maps:from_list(List),
-  MFAs = [MFA || {MFA, _Var} <- List],
-  SCC = [mk_var(Fun) || {_MFA, {_Var, Fun}, _Rec} <- SCC0],
   SelfRec =
     case SCC of
       [OneF] ->
diff --git a/lib/dialyzer/src/dialyzer_utils.erl b/lib/dialyzer/src/dialyzer_utils.erl
index 8480129dab..432d27571b 100644
--- a/lib/dialyzer/src/dialyzer_utils.erl
+++ b/lib/dialyzer/src/dialyzer_utils.erl
@@ -195,7 +195,7 @@ get_core_from_abstract_code(AbstrCode, Opts) ->
 
 get_record_and_type_info(AbstractCode) ->
   Module = get_module(AbstractCode),
-  get_record_and_type_info(AbstractCode, Module, dict:new()).
+  get_record_and_type_info(AbstractCode, Module, maps:new()).
 
 -spec get_record_and_type_info(abstract_code(), module(), type_table()) ->
 	{'ok', type_table()} | {'error', string()}.
@@ -208,7 +208,7 @@ get_record_and_type_info([{attribute, A, record, {Name, Fields0}}|Left],
   {ok, Fields} = get_record_fields(Fields0, RecDict),
   Arity = length(Fields),
   FN = {File, erl_anno:line(A)},
-  NewRecDict = dict:store({record, Name}, {FN, [{Arity,Fields}]}, RecDict),
+  NewRecDict = maps:put({record, Name}, {FN, [{Arity,Fields}]}, RecDict),
   get_record_and_type_info(Left, Module, NewRecDict, File);
 get_record_and_type_info([{attribute, A, type, {{record, Name}, Fields0, []}}
 			  |Left], Module, RecDict, File) ->
@@ -216,7 +216,7 @@ get_record_and_type_info([{attribute, A, type, {{record, Name}, Fields0, []}}
   {ok, Fields} = get_record_fields(Fields0, RecDict),
   Arity = length(Fields),
   FN = {File, erl_anno:line(A)},
-  NewRecDict = dict:store({record, Name}, {FN, [{Arity, Fields}]}, RecDict),
+  NewRecDict = maps:put({record, Name}, {FN, [{Arity, Fields}]}, RecDict),
   get_record_and_type_info(Left, Module, NewRecDict, File);
 get_record_and_type_info([{attribute, A, Attr, {Name, TypeForm}}|Left],
 			 Module, RecDict, File)
@@ -256,9 +256,9 @@ add_new_type(TypeOrOpaque, Name, TypeForm, ArgForms, Module, FN,
     false ->
       try erl_types:t_var_names(ArgForms) of
         ArgNames ->
-	  dict:store({TypeOrOpaque, Name, Arity},
-                     {{Module, FN, TypeForm, ArgNames},
-                      erl_types:t_any()}, RecDict)
+	  maps:put({TypeOrOpaque, Name, Arity},
+                   {{Module, FN, TypeForm, ArgNames},
+                    erl_types:t_any()}, RecDict)
       catch
         _:_ ->
 	  throw({error, flat_format("Type declaration for ~w does not "
@@ -289,19 +289,18 @@ get_record_fields([{record_field, _Line, Name, _Init}|Left], RecDict, Acc) ->
 get_record_fields([], _RecDict, Acc) ->
   lists:reverse(Acc).
 
--spec process_record_remote_types(codeserver()) -> codeserver().
+-spec process_record_remote_types(codeserver()) ->
+                                     {codeserver(), mod_records()}.
 
 %% The field types are cached. Used during analysis when handling records.
 process_record_remote_types(CServer) ->
   TempRecords = dialyzer_codeserver:get_temp_records(CServer),
   ExpTypes = dialyzer_codeserver:get_exported_types(CServer),
-  Cache = erl_types:cache__new(),
-  {TempRecords1, Cache1} =
-    process_opaque_types0(TempRecords, ExpTypes, Cache),
+  TempRecords1 = process_opaque_types0(TempRecords, ExpTypes),
   %% A cache (not the field type cache) is used for speeding things up a bit.
   VarTable = erl_types:var_table__new(),
   ModuleFun =
-    fun({Module, Record}, C0) ->
+    fun({Module, Record}) ->
         RecordFun =
           fun({Key, Value}, C2) ->
               case Key of
@@ -327,24 +326,27 @@ process_record_remote_types(CServer) ->
                 _Other -> {{Key, Value}, C2}
               end
           end,
-        {RecordList, C1} =
-          lists:mapfoldl(RecordFun, C0, dict:to_list(Record)),
-        {{Module, dict:from_list(RecordList)}, C1}
+        Cache = erl_types:cache__new(),
+        {RecordList, _NewCache} =
+          lists:mapfoldl(RecordFun, Cache, maps:to_list(Record)),
+        {Module, maps:from_list(RecordList)}
     end,
-  {NewRecordsList, C1} =
-    lists:mapfoldl(ModuleFun, Cache1, dict:to_list(TempRecords1)),
+  NewRecordsList = lists:map(ModuleFun, dict:to_list(TempRecords1)),
   NewRecords = dict:from_list(NewRecordsList),
-  _C8 = check_record_fields(NewRecords, ExpTypes, C1),
-  dialyzer_codeserver:finalize_records(NewRecords, CServer).
+  check_record_fields(NewRecords, ExpTypes),
+  {dialyzer_codeserver:finalize_records(NewRecords, CServer), NewRecords}.
 
 %% erl_types:t_from_form() substitutes the declaration of opaque types
 %% for the expanded type in some cases. To make sure the initial type,
 %% any(), is not used, the expansion is done twice.
 %% XXX: Recursive opaque types are not handled well.
-process_opaque_types0(TempRecords0, TempExpTypes, Cache) ->
-  {TempRecords1, NewCache} =
+process_opaque_types0(TempRecords0, TempExpTypes) ->
+  Cache = erl_types:cache__new(),
+  {TempRecords1, Cache1} =
     process_opaque_types(TempRecords0, TempExpTypes, Cache),
-  process_opaque_types(TempRecords1, TempExpTypes, NewCache).
+  {TempRecords, _NewCache} =
+    process_opaque_types(TempRecords1, TempExpTypes, Cache1),
+  TempRecords.
 
 process_opaque_types(TempRecords, TempExpTypes, Cache) ->
   VarTable = erl_types:var_table__new(),
@@ -364,8 +366,8 @@ process_opaque_types(TempRecords, TempExpTypes, Cache) ->
               end
           end,
         {RecordList, C1} =
-          lists:mapfoldl(RecordFun, C0, dict:to_list(Record)),
-        {{Module, dict:from_list(RecordList)}, C1}
+          lists:mapfoldl(RecordFun, C0, maps:to_list(Record)),
+        {{Module, maps:from_list(RecordList)}, C1}
         %% dict:map(RecordFun, Record)
     end,
   {TempRecordList, NewCache} =
@@ -373,7 +375,8 @@ process_opaque_types(TempRecords, TempExpTypes, Cache) ->
   {dict:from_list(TempRecordList), NewCache}.
   %% dict:map(ModuleFun, TempRecords).
 
-check_record_fields(Records, TempExpTypes, Cache) ->
+check_record_fields(Records, TempExpTypes) ->
+  Cache = erl_types:cache__new(),
   VarTable = erl_types:var_table__new(),
   CheckFun =
     fun({Module, Element}, C0) ->
@@ -403,9 +406,10 @@ check_record_fields(Records, TempExpTypes, Cache) ->
                   msg_with_position(Fun, FileLine)
               end
           end,
-        lists:foldl(ElemFun, C0, dict:to_list(Element))
+        lists:foldl(ElemFun, C0, maps:to_list(Element))
     end,
-  lists:foldl(CheckFun, Cache, dict:to_list(Records)).
+  _NewCache = lists:foldl(CheckFun, Cache, dict:to_list(Records)),
+  ok.
 
 msg_with_position(Fun, FileLine) ->
   try Fun()
@@ -428,17 +432,17 @@ merge_records(NewRecords, OldRecords) ->
 %%
 %% ============================================================================
 
--type spec_dict()     :: dict:dict().
--type callback_dict() :: dict:dict().
+-type spec_map()     :: dialyzer_codeserver:contracts().
+-type callback_map() :: dialyzer_codeserver:contracts().
 
 -spec get_spec_info(module(), abstract_code(), type_table()) ->
-        {'ok', spec_dict(), callback_dict()} | {'error', string()}.
+        {'ok', spec_map(), callback_map()} | {'error', string()}.
 
-get_spec_info(ModName, AbstractCode, RecordsDict) ->
+get_spec_info(ModName, AbstractCode, RecordsMap) ->
   OptionalCallbacks0 = get_optional_callbacks(AbstractCode, ModName),
   OptionalCallbacks = gb_sets:from_list(OptionalCallbacks0),
-  get_spec_info(AbstractCode, dict:new(), dict:new(),
-		RecordsDict, ModName, OptionalCallbacks, "nofile").
+  get_spec_info(AbstractCode, maps:new(), maps:new(),
+		RecordsMap, ModName, OptionalCallbacks, "nofile").
 
 get_optional_callbacks(Abs, ModName) ->
   [{ModName, F, A} || {F, A} <- get_optional_callbacks(Abs)].
@@ -456,7 +460,7 @@ get_optional_callbacks(Abs) ->
 %%    are erl_types:erl_type()
 
 get_spec_info([{attribute, Anno, Contract, {Id, TypeSpec}}|Left],
-	      SpecDict, CallbackDict, RecordsDict, ModName, OptCb, File)
+	      SpecMap, CallbackMap, RecordsMap, ModName, OptCb, File)
   when ((Contract =:= 'spec') or (Contract =:= 'callback')),
        is_list(TypeSpec) ->
   Ln = erl_anno:line(Anno),
@@ -465,24 +469,24 @@ get_spec_info([{attribute, Anno, Contract, {Id, TypeSpec}}|Left],
 	  {F, A} -> {ModName, F, A}
 	end,
   Xtra = [optional_callback || gb_sets:is_member(MFA, OptCb)],
-  ActiveDict =
+  ActiveMap =
     case Contract of
-      spec     -> SpecDict;
-      callback -> CallbackDict
+      spec     -> SpecMap;
+      callback -> CallbackMap
     end,
-  try dict:find(MFA, ActiveDict) of
+  try maps:find(MFA, ActiveMap) of
     error ->
       SpecData = {TypeSpec, Xtra},
-      NewActiveDict =
+      NewActiveMap =
 	dialyzer_contracts:store_tmp_contract(MFA, {File, Ln}, SpecData,
-					      ActiveDict, RecordsDict),
-      {NewSpecDict, NewCallbackDict} =
+					      ActiveMap, RecordsMap),
+      {NewSpecMap, NewCallbackMap} =
 	case Contract of
-	  spec     -> {NewActiveDict, CallbackDict};
-	  callback -> {SpecDict, NewActiveDict}
+	  spec     -> {NewActiveMap, CallbackMap};
+	  callback -> {SpecMap, NewActiveMap}
 	end,
-      get_spec_info(Left, NewSpecDict, NewCallbackDict,
-		    RecordsDict, ModName, OptCb, File);
+      get_spec_info(Left, NewSpecMap, NewCallbackMap,
+		    RecordsMap, ModName, OptCb, File);
     {ok, {{OtherFile, L}, _D}} ->
       {Mod, Fun, Arity} = MFA,
       Msg = flat_format("  Contract/callback for function ~w:~w/~w "
@@ -495,16 +499,16 @@ get_spec_info([{attribute, Anno, Contract, {Id, TypeSpec}}|Left],
 			  [Ln, Error])}
   end;
 get_spec_info([{attribute, _, file, {IncludeFile, _}}|Left],
-	      SpecDict, CallbackDict, RecordsDict, ModName, OptCb, _File) ->
-  get_spec_info(Left, SpecDict, CallbackDict,
-		RecordsDict, ModName, OptCb, IncludeFile);
-get_spec_info([_Other|Left], SpecDict, CallbackDict,
-	      RecordsDict, ModName, OptCb, File) ->
-  get_spec_info(Left, SpecDict, CallbackDict,
-                RecordsDict, ModName, OptCb, File);
-get_spec_info([], SpecDict, CallbackDict,
-              _RecordsDict, _ModName, _OptCb, _File) ->
-  {ok, SpecDict, CallbackDict}.
+	      SpecMap, CallbackMap, RecordsMap, ModName, OptCb, _File) ->
+  get_spec_info(Left, SpecMap, CallbackMap,
+		RecordsMap, ModName, OptCb, IncludeFile);
+get_spec_info([_Other|Left], SpecMap, CallbackMap,
+	      RecordsMap, ModName, OptCb, File) ->
+  get_spec_info(Left, SpecMap, CallbackMap,
+                RecordsMap, ModName, OptCb, File);
+get_spec_info([], SpecMap, CallbackMap,
+              _RecordsMap, _ModName, _OptCb, _File) ->
+  {ok, SpecMap, CallbackMap}.
 
 -spec get_fun_meta_info(module(), abstract_code(), [dial_warn_tag()]) ->
                 dialyzer_codeserver:fun_meta_info() | {'error', string()}.
@@ -700,7 +704,7 @@ format_errors([]) ->
 -spec format_sig(erl_types:erl_type()) -> string().
 
 format_sig(Type) ->
-  format_sig(Type, dict:new()).
+  format_sig(Type, maps:new()).
 
 -spec format_sig(erl_types:erl_type(), type_table()) -> string().
 
@@ -952,9 +956,7 @@ label(Tree) ->
 -spec parallelism() -> integer().
 
 parallelism() ->
-  CPUs = erlang:system_info(logical_processors_available),
-  Schedulers = erlang:system_info(schedulers),
-  min(CPUs, Schedulers).
+  erlang:system_info(schedulers_online).
 
 -spec family([{K,V}]) -> [{K,[V]}].