diff options
| -rw-r--r-- | lib/compiler/src/sys_core_fold.erl | 171 | ||||
| -rw-r--r-- | lib/compiler/test/andor_SUITE.erl | 8 | ||||
| -rw-r--r-- | lib/compiler/test/core_fold_SUITE.erl | 6 | ||||
| -rw-r--r-- | lib/compiler/test/record_SUITE.erl | 8 |
4 files changed, 121 insertions, 72 deletions
diff --git a/lib/compiler/src/sys_core_fold.erl b/lib/compiler/src/sys_core_fold.erl index 9c9b8031fe..b298473617 100644 --- a/lib/compiler/src/sys_core_fold.erl +++ b/lib/compiler/src/sys_core_fold.erl @@ -96,6 +96,10 @@ t=[], %Types in_guard=false}). %In guard or not. +-type type_info() :: cerl:cerl() | 'bool'. +-type yes_no_maybe() :: 'yes' | 'no' | 'maybe'. +-type sub() :: #sub{}. + -spec module(cerl:c_module(), [compile:option()]) -> {'ok', cerl:c_module(), [_]}. @@ -462,10 +466,7 @@ is_safe_simple(#c_call{module=#c_literal{val=erlang}, case erl_internal:bool_op(Name, NumArgs) of true -> %% Boolean operators are safe if the arguments are boolean. - all(fun(#c_var{name=V}) -> is_boolean_type(V, Sub); - (#c_literal{val=Lit}) -> is_boolean(Lit); - (_) -> false - end, Args); + all(fun(C) -> is_boolean_type(C, Sub) =:= yes end, Args); false -> %% We need a rather complicated test to ensure that %% we only allow safe calls that are allowed in a guard. @@ -1183,11 +1184,12 @@ fold_non_lit_args(Call, _, _, _, _) -> Call. eval_rel_op(Call, Op, [#c_var{name=V},#c_var{name=V}], _) -> Bool = erlang:Op(same, same), #c_literal{anno=cerl:get_ann(Call),val=Bool}; -eval_rel_op(Call, '=:=', [#c_var{name=V}=Var,#c_literal{val=true}], Sub) -> +eval_rel_op(Call, '=:=', [Term,#c_literal{val=true}], Sub) -> %% BoolVar =:= true ==> BoolVar - case is_boolean_type(V, Sub) of - true -> Var; - false -> Call + case is_boolean_type(Term, Sub) of + yes -> Term; + maybe -> Call; + no -> #c_literal{val=false} end; eval_rel_op(Call, '==', Ops, _Sub) -> case is_exact_eq_ok(Ops) of @@ -1235,40 +1237,31 @@ is_non_numeric_tuple(_Tuple, 0) -> true. %% there must be at least one non-literal argument (i.e. %% there is no need to handle the case that all argments %% are literal). -eval_bool_op(Call, 'and', [#c_literal{val=true},#c_var{name=V}=Res], Sub) -> - case is_boolean_type(V, Sub) of - true -> Res; - false-> Call - end; -eval_bool_op(Call, 'and', [#c_var{name=V}=Res,#c_literal{val=true}], Sub) -> - case is_boolean_type(V, Sub) of - true -> Res; - false-> Call - end; -eval_bool_op(Call, 'and', [#c_literal{val=false}=Res,#c_var{name=V}], Sub) -> - case is_boolean_type(V, Sub) of - true -> Res; - false-> Call - end; -eval_bool_op(Call, 'and', [#c_var{name=V},#c_literal{val=false}=Res], Sub) -> - case is_boolean_type(V, Sub) of - true -> Res; - false-> Call - end; + +eval_bool_op(Call, 'and', [#c_literal{val=true},Term], Sub) -> + eval_bool_op_1(Call, Term, Term, Sub); +eval_bool_op(Call, 'and', [Term,#c_literal{val=true}], Sub) -> + eval_bool_op_1(Call, Term, Term, Sub); +eval_bool_op(Call, 'and', [#c_literal{val=false}=Res,Term], Sub) -> + eval_bool_op_1(Call, Res, Term, Sub); +eval_bool_op(Call, 'and', [Term,#c_literal{val=false}=Res], Sub) -> + eval_bool_op_1(Call, Res, Term, Sub); eval_bool_op(Call, _, _, _) -> Call. +eval_bool_op_1(Call, Res, Term, Sub) -> + case is_boolean_type(Term, Sub) of + yes -> Res; + no -> eval_failure(Call, badarg); + maybe -> Call + end. + %% Evaluate is_boolean/1 using type information. -eval_is_boolean(Call, #c_var{name=V}, Sub) -> - case is_boolean_type(V, Sub) of - true -> #c_literal{val=true}; - false -> Call - end; -eval_is_boolean(_, #c_cons{}, _) -> - #c_literal{val=false}; -eval_is_boolean(_, #c_tuple{}, _) -> - #c_literal{val=false}; -eval_is_boolean(Call, _, _) -> - Call. +eval_is_boolean(Call, Term, Sub) -> + case is_boolean_type(Term, Sub) of + no -> #c_literal{val=false}; + yes -> #c_literal{val=true}; + maybe -> Call + end. %% eval_length(Call, List) -> Val. %% Evaluates the length for the prefix of List which has a known @@ -1318,20 +1311,19 @@ eval_append(Call, X, Y) -> %% Evaluates element/2 if the position Pos is a literal and %% the shape of the tuple Tuple is known. %% -eval_element(Call, #c_literal{val=Pos}, #c_tuple{es=Es}, _Types) when is_integer(Pos) -> - if - 1 =< Pos, Pos =< length(Es) -> - lists:nth(Pos, Es); - true -> - eval_failure(Call, badarg) - end; -eval_element(Call, #c_literal{val=Pos}, #c_var{name=V}, Types) +eval_element(Call, #c_literal{val=Pos}, Tuple, Types) when is_integer(Pos) -> - case orddict:find(V, Types#sub.t) of - {ok,#c_tuple{es=Elements}} -> + case get_type(Tuple, Types) of + none -> + Call; + Type -> + Es = case cerl:is_c_tuple(Type) of + false -> []; + true -> cerl:tuple_es(Type) + end, if - 1 =< Pos, Pos =< length(Elements) -> - El = lists:nth(Pos, Elements), + 1 =< Pos, Pos =< length(Es) -> + El = lists:nth(Pos, Es), try pat_to_expr(El) catch @@ -1339,12 +1331,9 @@ eval_element(Call, #c_literal{val=Pos}, #c_var{name=V}, Types) Call end; true -> + %% Index outside tuple or not a tuple. eval_failure(Call, badarg) - end; - {ok,_} -> - eval_failure(Call, badarg); - error -> - Call + end end; eval_element(Call, Pos, Tuple, _Types) -> case is_not_integer(Pos) orelse is_not_tuple(Tuple) of @@ -1357,14 +1346,24 @@ eval_element(Call, Pos, Tuple, _Types) -> %% eval_is_record(Call, Var, Tag, Size, Types) -> Val. %% Evaluates is_record/3 using type information. %% -eval_is_record(Call, #c_var{name=V}, #c_literal{val=NeededTag}=Lit, +eval_is_record(Call, Term, #c_literal{val=NeededTag}, #c_literal{val=Size}, Types) -> - case orddict:find(V, Types#sub.t) of - {ok,#c_tuple{es=[#c_literal{val=Tag}|_]=Es}} -> - Lit#c_literal{val=Tag =:= NeededTag andalso - length(Es) =:= Size}; - _ -> - Call + case get_type(Term, Types) of + none -> + Call; + Type -> + Es = case cerl:is_c_tuple(Type) of + false -> []; + true -> cerl:tuple_es(Type) + end, + case Es of + [#c_literal{val=Tag}|_] -> + Bool = Tag =:= NeededTag andalso + length(Es) =:= Size, + #c_literal{val=Bool}; + _ -> + #c_literal{val=false} + end end; eval_is_record(Call, _, _, _, _) -> Call. @@ -2406,11 +2405,8 @@ is_bool_expr(#c_let{vars=[V],arg=Arg,body=B}, Sub0) -> is_bool_expr(#c_let{body=B}, Sub) -> %% Binding of multiple variables. is_bool_expr(B, Sub); -is_bool_expr(#c_literal{val=Bool}, _) when is_boolean(Bool) -> - true; -is_bool_expr(#c_var{name=V}, Sub) -> - is_boolean_type(V, Sub); -is_bool_expr(_, _) -> false. +is_bool_expr(C, Sub) -> + is_boolean_type(C, Sub) =:= yes. is_bool_expr_list([C|Cs], Sub) -> is_bool_expr(C, Sub) andalso is_bool_expr_list(Cs, Sub); @@ -2828,12 +2824,45 @@ is_any_var_used([#c_var{name=V}|Vs], Expr) -> end; is_any_var_used([], _) -> false. -is_boolean_type(V, #sub{t=Tdb}) -> +%%% +%%% Retrieving information about types. +%%% + +-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,bool} -> true; - _ -> false + {ok,Type} -> Type; + error -> none + end; +get_type(C, _) -> + case cerl:type(C) of + binary -> C; + map -> C; + _ -> + case cerl:is_data(C) of + true -> C; + false -> none + end + end. + +-spec is_boolean_type(cerl:cerl(), sub()) -> yes_no_maybe(). + +is_boolean_type(Var, Sub) -> + case get_type(Var, Sub) of + none -> + maybe; + bool -> + yes; + C -> + B = cerl:is_c_atom(C) andalso + is_boolean(cerl:atom_val(C)), + yes_no(B) end. +yes_no(true) -> yes; +yes_no(false) -> no. + %% update_types(Expr, Pattern, Sub) -> Sub' %% Update the type database. update_types(Expr, Pat, #sub{t=Tdb0}=Sub) -> diff --git a/lib/compiler/test/andor_SUITE.erl b/lib/compiler/test/andor_SUITE.erl index 22aa19522d..3199440d84 100644 --- a/lib/compiler/test/andor_SUITE.erl +++ b/lib/compiler/test/andor_SUITE.erl @@ -173,7 +173,13 @@ t_and_or(Config) when is_list(Config) -> true = (fun (X = true) when X or true or X -> true end)(True), - ok. + Tuple = id({a,b}), + case Tuple of + {_,_} -> + {'EXIT',{badarg,_}} = (catch true and Tuple) + end, + + ok. t_andalso(Config) when is_list(Config) -> Bs = [true,false], diff --git a/lib/compiler/test/core_fold_SUITE.erl b/lib/compiler/test/core_fold_SUITE.erl index 40a5ba2b17..a52610497f 100644 --- a/lib/compiler/test/core_fold_SUITE.erl +++ b/lib/compiler/test/core_fold_SUITE.erl @@ -280,6 +280,12 @@ coverage(Config) when is_list(Config) -> error = bsm_an_inlined(<<1,2,3>>, Config), error = bsm_an_inlined([], Config), + %% Cover eval_rel_op/4. + Tuple = id({a,b}), + false = case Tuple of + {_,_} -> + Tuple =:= true + end, ok. cover_will_match_list_type(A) -> diff --git a/lib/compiler/test/record_SUITE.erl b/lib/compiler/test/record_SUITE.erl index f736e14bf6..8cc90026ec 100644 --- a/lib/compiler/test/record_SUITE.erl +++ b/lib/compiler/test/record_SUITE.erl @@ -246,6 +246,14 @@ record_test_2(Config) when is_list(Config) -> ?line Barf = update_barf(Barf0), ?line #barf{a="abc",b=1} = id(Barf), + %% Test optimization of is_record/3. + false = case id({a,b}) of + {_,_}=Tuple -> is_record(Tuple, foo) + end, + false = case id(true) of + true=Bool -> is_record(Bool, foo) + end, + ok. record_test_3(Config) when is_list(Config) -> |