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authorHans Bolinder <[email protected]>2017-01-25 12:51:34 +0100
committerHans Bolinder <[email protected]>2017-02-01 09:14:57 +0100
commit7db0ed6161a68ab7608abe98947ae209da31ae33 (patch)
tree35ca8995f75da262854e5c2cfe94ee7ffd33015a /lib/hipe/cerl
parent21d21786abdaae2ae0a601baf5102412399d7af6 (diff)
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dialyzer: Optimize collection of variables
Diffstat (limited to 'lib/hipe/cerl')
-rw-r--r--lib/hipe/cerl/erl_types.erl15
1 files changed, 10 insertions, 5 deletions
diff --git a/lib/hipe/cerl/erl_types.erl b/lib/hipe/cerl/erl_types.erl
index 7edfbf65df..10e97ff54d 100644
--- a/lib/hipe/cerl/erl_types.erl
+++ b/lib/hipe/cerl/erl_types.erl
@@ -2243,16 +2243,21 @@ t_has_var_list([]) -> false.
-spec t_collect_vars(erl_type()) -> [erl_type()].
t_collect_vars(T) ->
- t_collect_vars(T, []).
+ Vs = t_collect_vars(T, maps:new()),
+ [V || {V, _} <- maps:to_list(Vs)].
--spec t_collect_vars(erl_type(), [erl_type()]) -> [erl_type()].
+-type ctab() :: #{erl_type() => 'any'}.
+
+-spec t_collect_vars(erl_type(), ctab()) -> ctab().
t_collect_vars(?var(_) = Var, Acc) ->
- ordsets:add_element(Var, Acc);
+ maps:put(Var, any, Acc);
t_collect_vars(?function(Domain, Range), Acc) ->
- ordsets:union(t_collect_vars(Domain, Acc), t_collect_vars(Range, []));
+ Acc1 = t_collect_vars(Domain, Acc),
+ t_collect_vars(Range, Acc1);
t_collect_vars(?list(Contents, Termination, _), Acc) ->
- ordsets:union(t_collect_vars(Contents, Acc), t_collect_vars(Termination, []));
+ Acc1 = t_collect_vars(Contents, Acc),
+ t_collect_vars(Termination, Acc1);
t_collect_vars(?product(Types), Acc) ->
t_collect_vars_list(Types, Acc);
t_collect_vars(?tuple(?any, ?any, ?any), Acc) ->