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-rw-r--r--lib/compiler/src/beam_validator.erl60
1 files changed, 60 insertions, 0 deletions
diff --git a/lib/compiler/src/beam_validator.erl b/lib/compiler/src/beam_validator.erl
index 8ca90870c4..5175be3ad5 100644
--- a/lib/compiler/src/beam_validator.erl
+++ b/lib/compiler/src/beam_validator.erl
@@ -2502,6 +2502,8 @@ call_return_type_1(erlang, '--', 2, _Vst) ->
list;
call_return_type_1(erlang, F, A, _) ->
erlang_mod_return_type(F, A);
+call_return_type_1(lists, F, A, Vst) ->
+ lists_mod_return_type(F, A, Vst);
call_return_type_1(math, F, A, _) ->
math_mod_return_type(F, A);
call_return_type_1(M, F, A, _) when is_atom(M), is_atom(F), is_integer(A), A >= 0 ->
@@ -2540,6 +2542,64 @@ math_mod_return_type(fmod, 2) -> {float,[]};
math_mod_return_type(pi, 0) -> {float,[]};
math_mod_return_type(F, A) when is_atom(F), is_integer(A), A >= 0 -> term.
+lists_mod_return_type(dropwhile, 2, _Vst) ->
+ list;
+lists_mod_return_type(duplicate, 2, _Vst) ->
+ list;
+lists_mod_return_type(filter, 2, _Vst) ->
+ list;
+lists_mod_return_type(flatten, 2, _Vst) ->
+ list;
+lists_mod_return_type(map, 2, Vst) ->
+ same_length_type({x,1}, Vst);
+lists_mod_return_type(MF, 3, Vst) when MF =:= mapfoldl; MF =:= mapfoldr ->
+ ListType = same_length_type({x,2}, Vst),
+ {tuple,2,#{1=>ListType}};
+lists_mod_return_type(partition, 2, _Vst) ->
+ two_tuple(list, list);
+lists_mod_return_type(reverse, 1, Vst) ->
+ same_length_type({x,0}, Vst);
+lists_mod_return_type(seq, 2, _Vst) ->
+ list;
+lists_mod_return_type(seq, 3, _Vst) ->
+ list;
+lists_mod_return_type(sort, 1, Vst) ->
+ same_length_type({x,0}, Vst);
+lists_mod_return_type(sort, 2, Vst) ->
+ same_length_type({x,1}, Vst);
+lists_mod_return_type(splitwith, 2, _Vst) ->
+ two_tuple(list, list);
+lists_mod_return_type(takewhile, 2, _Vst) ->
+ list;
+lists_mod_return_type(unzip, 1, Vst) ->
+ ListType = same_length_type({x,0}, Vst),
+ two_tuple(ListType, ListType);
+lists_mod_return_type(usort, 1, Vst) ->
+ same_length_type({x,0}, Vst);
+lists_mod_return_type(usort, 2, Vst) ->
+ same_length_type({x,1}, Vst);
+lists_mod_return_type(zip, 2, _Vst) ->
+ list;
+lists_mod_return_type(zip3, 3, _Vst) ->
+ list;
+lists_mod_return_type(zipwith, 3, _Vst) ->
+ list;
+lists_mod_return_type(zipwith3, 4, _Vst) ->
+ list;
+lists_mod_return_type(_, _, _) ->
+ term.
+
+two_tuple(Type1, Type2) ->
+ {tuple,2,#{1=>Type1,2=>Type2}}.
+
+same_length_type(Reg, Vst) ->
+ case get_term_type(Reg, Vst) of
+ {literal,[_|_]} -> cons;
+ cons -> cons;
+ nil -> nil;
+ _ -> list
+ end.
+
check_limit({x,X}) when is_integer(X), X < 1023 ->
%% Note: x(1023) is reserved for use by the BEAM loader.
ok;