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Diffstat (limited to 'lib/dialyzer/test/options1_tests_SUITE_data/src/compiler/v3_core.erl')
| -rw-r--r-- | lib/dialyzer/test/options1_tests_SUITE_data/src/compiler/v3_core.erl | 1320 |
1 files changed, 0 insertions, 1320 deletions
diff --git a/lib/dialyzer/test/options1_tests_SUITE_data/src/compiler/v3_core.erl b/lib/dialyzer/test/options1_tests_SUITE_data/src/compiler/v3_core.erl deleted file mode 100644 index b561182932..0000000000 --- a/lib/dialyzer/test/options1_tests_SUITE_data/src/compiler/v3_core.erl +++ /dev/null @@ -1,1320 +0,0 @@ -%% ``The contents of this file are subject to the Erlang Public License, -%% Version 1.1, (the "License"); you may not use this file except in -%% compliance with the License. You should have received a copy of the -%% Erlang Public License along with this software. If not, it can be -%% retrieved via the world wide web at http://www.erlang.org/. -%% -%% Software distributed under the License is distributed on an "AS IS" -%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See -%% the License for the specific language governing rights and limitations -%% under the License. -%% -%% The Initial Developer of the Original Code is Ericsson Utvecklings AB. -%% Portions created by Ericsson are Copyright 1999, Ericsson Utvecklings -%% AB. All Rights Reserved.'' -%% -%% $Id: v3_core.erl,v 1.1 2008/12/17 09:53:42 mikpe Exp $ -%% -%% Purpose : Transform normal Erlang to Core Erlang - -%% At this stage all preprocessing has been done. All that is left are -%% "pure" Erlang functions. -%% -%% Core transformation is done in three stages: -%% -%% 1. Flatten expressions into an internal core form without doing -%% matching. -%% -%% 2. Step "forwards" over the icore code annotating each "top-level" -%% thing with variable usage. Detect bound variables in matching -%% and replace with explicit guard test. Annotate "internal-core" -%% expressions with variables they use and create. Convert matches -%% to cases when not pure assignments. -%% -%% 3. Step "backwards" over icore code using variable usage -%% annotations to change implicit exported variables to explicit -%% returns. -%% -%% To ensure the evaluation order we ensure that all arguments are -%% safe. A "safe" is basically a core_lib simple with VERY restricted -%% binaries. -%% -%% We have to be very careful with matches as these create variables. -%% While we try not to flatten things more than necessary we must make -%% sure that all matches are at the top level. For this we use the -%% type "novars" which are non-match expressions. Cases and receives -%% can also create problems due to exports variables so they are not -%% "novars" either. I.e. a novars will not export variables. -%% -%% Annotations in the #iset, #iletrec, and all other internal records -%% is kept in a record, #a, not in a list as in proper core. This is -%% easier and faster and creates no problems as we have complete control -%% over all annotations. -%% -%% On output, the annotation for most Core Erlang terms will contain -%% the source line number. A few terms will be marked with the atom -%% atom 'compiler_generated', to indicate that the compiler has generated -%% them and that no warning should be generated if they are optimized -%% away. -%% -%% -%% In this translation: -%% -%% call ops are safes -%% call arguments are safes -%% match arguments are novars -%% case arguments are novars -%% receive timeouts are novars -%% let/set arguments are expressions -%% fun is not a safe - --module(v3_core). - --export([module/2,format_error/1]). - --import(lists, [map/2,foldl/3,foldr/3,mapfoldl/3,splitwith/2]). --import(ordsets, [add_element/2,del_element/2,is_element/2, - union/1,union/2,intersection/2,subtract/2]). - --include("core_parse.hrl"). - --record(a, {us=[],ns=[],anno=[]}). %Internal annotation - -%% Internal core expressions and help functions. -%% N.B. annotations fields in place as normal Core expressions. - --record(iset, {anno=#a{},var,arg}). --record(iletrec, {anno=#a{},defs,body}). --record(imatch, {anno=#a{},pat,guard=[],arg,fc}). --record(icase, {anno=#a{},args,clauses,fc}). --record(iclause, {anno=#a{},pats,pguard=[],guard,body}). --record(ifun, {anno=#a{},id,vars,clauses,fc}). --record(iapply, {anno=#a{},op,args}). --record(icall, {anno=#a{},module,name,args}). --record(iprimop, {anno=#a{},name,args}). --record(itry, {anno=#a{},args,vars,body,evars,handler}). --record(icatch, {anno=#a{},body}). --record(ireceive1, {anno=#a{},clauses}). --record(ireceive2, {anno=#a{},clauses,timeout,action}). --record(iprotect, {anno=#a{},body}). --record(ibinary, {anno=#a{},segments}). %Not used in patterns. - --record(core, {vcount=0, %Variable counter - fcount=0, %Function counter - ws=[]}). %Warnings. - -module({Mod,Exp,Forms}, _Opts) -> - Cexp = map(fun ({N,A}) -> #c_fname{id=N,arity=A} end, Exp), - {Kfs,As,Ws} = foldr(fun form/2, {[],[],[]}, Forms), - {ok,#c_module{name=#c_atom{val=Mod},exports=Cexp,attrs=As,defs=Kfs},Ws}. - -form({function,_,_,_,_}=F0, {Fs,As,Ws0}) -> - {F,Ws} = function(F0, Ws0), - {[F|Fs],As,Ws}; -form({attribute,_,_,_}=F, {Fs,As,Ws}) -> - {Fs,[attribute(F)|As],Ws}. - -attribute({attribute,_,Name,Val}) -> - #c_def{name=core_lib:make_literal(Name), - val=core_lib:make_literal(Val)}. - -function({function,_,Name,Arity,Cs0}, Ws0) -> - %%ok = io:fwrite("~p - ", [{Name,Arity}]), - St0 = #core{vcount=0,ws=Ws0}, - {B0,St1} = body(Cs0, Arity, St0), - %%ok = io:fwrite("1", []), - %%ok = io:fwrite("~w:~p~n", [?LINE,B0]), - {B1,St2} = ubody(B0, St1), - %%ok = io:fwrite("2", []), - %%ok = io:fwrite("~w:~p~n", [?LINE,B1]), - {B2,#core{ws=Ws}} = cbody(B1, St2), - %%ok = io:fwrite("3~n", []), - {#c_def{name=#c_fname{id=Name,arity=Arity},val=B2},Ws}. - -body(Cs0, Arity, St0) -> - Anno = [element(2, hd(Cs0))], - {Args,St1} = new_vars(Anno, Arity, St0), - {Cs1,St2} = clauses(Cs0, St1), - {Ps,St3} = new_vars(Arity, St2), %Need new variables here - Fc = fail_clause(Ps, #c_tuple{es=[#c_atom{val=function_clause}|Ps]}), - {#ifun{anno=#a{anno=Anno},id=[],vars=Args,clauses=Cs1,fc=Fc},St3}. - -%% clause(Clause, State) -> {Cclause,State} | noclause. -%% clauses([Clause], State) -> {[Cclause],State}. -%% Convert clauses. Trap bad pattern aliases and remove clause from -%% clause list. - -clauses([C0|Cs0], St0) -> - case clause(C0, St0) of - {noclause,St} -> clauses(Cs0, St); - {C,St1} -> - {Cs,St2} = clauses(Cs0, St1), - {[C|Cs],St2} - end; -clauses([], St) -> {[],St}. - -clause({clause,Lc,H0,G0,B0}, St0) -> - case catch head(H0) of - {'EXIT',_}=Exit -> exit(Exit); %Propagate error - nomatch -> - St = add_warning(Lc, nomatch, St0), - {noclause,St}; %Bad pattern - H1 -> - {G1,St1} = guard(G0, St0), - {B1,St2} = exprs(B0, St1), - {#iclause{anno=#a{anno=[Lc]},pats=H1,guard=G1,body=B1},St2} - end. - -%% head([P]) -> [P]. - -head(Ps) -> pattern_list(Ps). - -%% guard([Expr], State) -> {[Cexpr],State}. -%% Build an explict and/or tree of guard alternatives, then traverse -%% top-level and/or tree and "protect" inner tests. - -guard([], St) -> {[],St}; -guard(Gs0, St) -> - Gs = foldr(fun (Gt0, Rhs) -> - Gt1 = guard_tests(Gt0), - L = element(2, Gt1), - {op,L,'or',Gt1,Rhs} - end, guard_tests(last(Gs0)), first(Gs0)), - gexpr_top(Gs, St). - -guard_tests([]) -> []; -guard_tests(Gs) -> - L = element(2, hd(Gs)), - {protect,L,foldr(fun (G, Rhs) -> {op,L,'and',G,Rhs} end, last(Gs), first(Gs))}. - -%% gexpr_top(Expr, State) -> {Cexpr,State}. -%% Generate an internal core expression of a guard test. Explicitly -%% handle outer boolean expressions and "protect" inner tests in a -%% reasonably smart way. - -gexpr_top(E0, St0) -> - {E1,Eps0,Bools,St1} = gexpr(E0, [], St0), - {E,Eps,St} = force_booleans(Bools, E1, Eps0, St1), - {Eps++[E],St}. - -%% gexpr(Expr, Bools, State) -> {Cexpr,[PreExp],Bools,State}. -%% Generate an internal core expression of a guard test. - -gexpr({protect,Line,Arg}, Bools0, St0) -> - case gexpr(Arg, [], St0) of - {E0,[],Bools,St1} -> - {E,Eps,St} = force_booleans(Bools, E0, [], St1), - {E,Eps,Bools0,St}; - {E0,Eps0,Bools,St1} -> - {E,Eps,St} = force_booleans(Bools, E0, Eps0, St1), - {#iprotect{anno=#a{anno=[Line]},body=Eps++[E]},[],Bools0,St} - end; -gexpr({op,Line,Op,L,R}=Call, Bools0, St0) -> - case erl_internal:bool_op(Op, 2) of - true -> - {Le,Lps,Bools1,St1} = gexpr(L, Bools0, St0), - {Ll,Llps,St2} = force_safe(Le, St1), - {Re,Rps,Bools,St3} = gexpr(R, Bools1, St2), - {Rl,Rlps,St4} = force_safe(Re, St3), - Anno = [Line], - {#icall{anno=#a{anno=Anno}, %Must have an #a{} - module=#c_atom{anno=Anno,val=erlang},name=#c_atom{anno=Anno,val=Op}, - args=[Ll,Rl]},Lps ++ Llps ++ Rps ++ Rlps,Bools,St4}; - false -> - gexpr_test(Call, Bools0, St0) - end; -gexpr({op,Line,Op,A}=Call, Bools0, St0) -> - case erl_internal:bool_op(Op, 1) of - true -> - {Ae,Aps,Bools,St1} = gexpr(A, Bools0, St0), - {Al,Alps,St2} = force_safe(Ae, St1), - Anno = [Line], - {#icall{anno=#a{anno=Anno}, %Must have an #a{} - module=#c_atom{anno=Anno,val=erlang},name=#c_atom{anno=Anno,val=Op}, - args=[Al]},Aps ++ Alps,Bools,St2}; - false -> - gexpr_test(Call, Bools0, St0) - end; -gexpr(E0, Bools, St0) -> - gexpr_test(E0, Bools, St0). - -%% gexpr_test(Expr, Bools, State) -> {Cexpr,[PreExp],Bools,State}. -%% Generate a guard test. At this stage we must be sure that we have -%% a proper boolean value here so wrap things with an true test if we -%% don't know, i.e. if it is not a comparison or a type test. - -gexpr_test({atom,L,true}, Bools, St0) -> - {#c_atom{anno=[L],val=true},[],Bools,St0}; -gexpr_test({atom,L,false}, Bools, St0) -> - {#c_atom{anno=[L],val=false},[],Bools,St0}; -gexpr_test(E0, Bools0, St0) -> - {E1,Eps0,St1} = expr(E0, St0), - %% Generate "top-level" test and argument calls. - case E1 of - #icall{anno=Anno,module=#c_atom{val=erlang},name=#c_atom{val=N},args=As} -> - Ar = length(As), - case erl_internal:type_test(N, Ar) orelse - erl_internal:comp_op(N, Ar) orelse - (N == internal_is_record andalso Ar == 3) of - true -> {E1,Eps0,Bools0,St1}; - false -> - Lanno = Anno#a.anno, - {New,St2} = new_var(Lanno, St1), - Bools = [New|Bools0], - {#icall{anno=Anno, %Must have an #a{} - module=#c_atom{anno=Lanno,val=erlang}, - name=#c_atom{anno=Lanno,val='=:='}, - args=[New,#c_atom{anno=Lanno,val=true}]}, - Eps0 ++ [#iset{anno=Anno,var=New,arg=E1}],Bools,St2} - end; - _ -> - Anno = get_ianno(E1), - Lanno = get_lineno_anno(E1), - case core_lib:is_simple(E1) of - true -> - Bools = [E1|Bools0], - {#icall{anno=Anno, %Must have an #a{} - module=#c_atom{anno=Lanno,val=erlang}, - name=#c_atom{anno=Lanno,val='=:='}, - args=[E1,#c_atom{anno=Lanno,val=true}]},Eps0,Bools,St1}; - false -> - {New,St2} = new_var(Lanno, St1), - Bools = [New|Bools0], - {#icall{anno=Anno, %Must have an #a{} - module=#c_atom{anno=Lanno,val=erlang}, - name=#c_atom{anno=Lanno,val='=:='}, - args=[New,#c_atom{anno=Lanno,val=true}]}, - Eps0 ++ [#iset{anno=Anno,var=New,arg=E1}],Bools,St2} - end - end. - -force_booleans([], E, Eps, St) -> - {E,Eps,St}; -force_booleans([V|Vs], E0, Eps0, St0) -> - {E1,Eps1,St1} = force_safe(E0, St0), - Lanno = element(2, V), - Anno = #a{anno=Lanno}, - Call = #icall{anno=Anno,module=#c_atom{anno=Lanno,val=erlang}, - name=#c_atom{anno=Lanno,val=is_boolean}, - args=[V]}, - {New,St} = new_var(Lanno, St1), - Iset = #iset{anno=Anno,var=New,arg=Call}, - Eps = Eps0 ++ Eps1 ++ [Iset], - E = #icall{anno=Anno, - module=#c_atom{anno=Lanno,val=erlang},name=#c_atom{anno=Lanno,val='and'}, - args=[E1,New]}, - force_booleans(Vs, E, Eps, St). - -%% exprs([Expr], State) -> {[Cexpr],State}. -%% Flatten top-level exprs. - -exprs([E0|Es0], St0) -> - {E1,Eps,St1} = expr(E0, St0), - {Es1,St2} = exprs(Es0, St1), - {Eps ++ [E1] ++ Es1,St2}; -exprs([], St) -> {[],St}. - -%% expr(Expr, State) -> {Cexpr,[PreExp],State}. -%% Generate an internal core expression. - -expr({var,L,V}, St) -> {#c_var{anno=[L],name=V},[],St}; -expr({char,L,C}, St) -> {#c_char{anno=[L],val=C},[],St}; -expr({integer,L,I}, St) -> {#c_int{anno=[L],val=I},[],St}; -expr({float,L,F}, St) -> {#c_float{anno=[L],val=F},[],St}; -expr({atom,L,A}, St) -> {#c_atom{anno=[L],val=A},[],St}; -expr({nil,L}, St) -> {#c_nil{anno=[L]},[],St}; -expr({string,L,S}, St) -> {#c_string{anno=[L],val=S},[],St}; -expr({cons,L,H0,T0}, St0) -> - {H1,Hps,St1} = safe(H0, St0), - {T1,Tps,St2} = safe(T0, St1), - {#c_cons{anno=[L],hd=H1,tl=T1},Hps ++ Tps,St2}; -expr({lc,L,E,Qs}, St) -> - lc_tq(L, E, Qs, {nil,L}, St); -expr({tuple,L,Es0}, St0) -> - {Es1,Eps,St1} = safe_list(Es0, St0), - {#c_tuple{anno=[L],es=Es1},Eps,St1}; -expr({bin,L,Es0}, St0) -> - {Es1,Eps,St1} = expr_bin(Es0, St0), - {#ibinary{anno=#a{anno=[L]},segments=Es1},Eps,St1}; -expr({block,_,Es0}, St0) -> - %% Inline the block directly. - {Es1,St1} = exprs(first(Es0), St0), - {E1,Eps,St2} = expr(last(Es0), St1), - {E1,Es1 ++ Eps,St2}; -expr({'if',L,Cs0}, St0) -> - {Cs1,St1} = clauses(Cs0, St0), - Fc = fail_clause([], #c_atom{val=if_clause}), - {#icase{anno=#a{anno=[L]},args=[],clauses=Cs1,fc=Fc},[],St1}; -expr({'case',L,E0,Cs0}, St0) -> - {E1,Eps,St1} = novars(E0, St0), - {Cs1,St2} = clauses(Cs0, St1), - {Fpat,St3} = new_var(St2), - Fc = fail_clause([Fpat], #c_tuple{es=[#c_atom{val=case_clause},Fpat]}), - {#icase{anno=#a{anno=[L]},args=[E1],clauses=Cs1,fc=Fc},Eps,St3}; -expr({'receive',L,Cs0}, St0) -> - {Cs1,St1} = clauses(Cs0, St0), - {#ireceive1{anno=#a{anno=[L]},clauses=Cs1}, [], St1}; -expr({'receive',L,Cs0,Te0,Tes0}, St0) -> - {Te1,Teps,St1} = novars(Te0, St0), - {Tes1,St2} = exprs(Tes0, St1), - {Cs1,St3} = clauses(Cs0, St2), - {#ireceive2{anno=#a{anno=[L]}, - clauses=Cs1,timeout=Te1,action=Tes1},Teps,St3}; -expr({'try',L,Es0,[],Ecs,[]}, St0) -> - %% 'try ... catch ... end' - {Es1,St1} = exprs(Es0, St0), - {V,St2} = new_var(St1), %This name should be arbitrary - {Evs,Hs,St3} = try_exception(Ecs, St2), - {#itry{anno=#a{anno=[L]},args=Es1,vars=[V],body=[V], - evars=Evs,handler=Hs}, - [],St3}; -expr({'try',L,Es0,Cs0,Ecs,[]}, St0) -> - %% 'try ... of ... catch ... end' - {Es1,St1} = exprs(Es0, St0), - {V,St2} = new_var(St1), %This name should be arbitrary - {Cs1,St3} = clauses(Cs0, St2), - {Fpat,St4} = new_var(St3), - Fc = fail_clause([Fpat], #c_tuple{es=[#c_atom{val=try_clause},Fpat]}), - {Evs,Hs,St5} = try_exception(Ecs, St4), - {#itry{anno=#a{anno=[L]},args=Es1, - vars=[V],body=[#icase{anno=#a{},args=[V],clauses=Cs1,fc=Fc}], - evars=Evs,handler=Hs}, - [],St5}; -expr({'try',L,Es0,[],[],As0}, St0) -> - %% 'try ... after ... end' - {Es1,St1} = exprs(Es0, St0), - {As1,St2} = exprs(As0, St1), - {Evs,Hs,St3} = try_after(As1,St2), - {V,St4} = new_var(St3), % (must not exist in As1) - %% TODO: this duplicates the 'after'-code; should lift to function. - {#itry{anno=#a{anno=[L]},args=Es1,vars=[V],body=As1++[V], - evars=Evs,handler=Hs}, - [],St4}; -expr({'try',L,Es,Cs,Ecs,As}, St0) -> - %% 'try ... [of ...] [catch ...] after ... end' - expr({'try',L,[{'try',L,Es,Cs,Ecs,[]}],[],[],As}, St0); -expr({'catch',L,E0}, St0) -> - {E1,Eps,St1} = expr(E0, St0), - {#icatch{anno=#a{anno=[L]},body=Eps ++ [E1]},[],St1}; -expr({'fun',L,{function,F,A},{_,_,_}=Id}, St) -> - {#c_fname{anno=[L,{id,Id}],id=F,arity=A},[],St}; -expr({'fun',L,{clauses,Cs},Id}, St) -> - fun_tq(Id, Cs, L, St); -expr({call,L0,{remote,_,{atom,_,erlang},{atom,_,is_record}},[_,_,_]=As}, St) - when L0 < 0 -> - %% Compiler-generated erlang:is_record/3 should be converted to - %% erlang:internal_is_record/3. - L = -L0, - expr({call,L,{remote,L,{atom,L,erlang},{atom,L,internal_is_record}},As}, St); -expr({call,L,{remote,_,M,F},As0}, St0) -> - {[M1,F1|As1],Aps,St1} = safe_list([M,F|As0], St0), - {#icall{anno=#a{anno=[L]},module=M1,name=F1,args=As1},Aps,St1}; -expr({call,Lc,{atom,Lf,F},As0}, St0) -> - {As1,Aps,St1} = safe_list(As0, St0), - Op = #c_fname{anno=[Lf],id=F,arity=length(As1)}, - {#iapply{anno=#a{anno=[Lc]},op=Op,args=As1},Aps,St1}; -expr({call,L,FunExp,As0}, St0) -> - {Fun,Fps,St1} = safe(FunExp, St0), - {As1,Aps,St2} = safe_list(As0, St1), - {#iapply{anno=#a{anno=[L]},op=Fun,args=As1},Fps ++ Aps,St2}; -expr({match,L,P0,E0}, St0) -> - %% First fold matches together to create aliases. - {P1,E1} = fold_match(E0, P0), - {E2,Eps,St1} = novars(E1, St0), - P2 = (catch pattern(P1)), - {Fpat,St2} = new_var(St1), - Fc = fail_clause([Fpat], #c_tuple{es=[#c_atom{val=badmatch},Fpat]}), - case P2 of - {'EXIT',_}=Exit -> exit(Exit); %Propagate error - nomatch -> - St = add_warning(L, nomatch, St2), - {#icase{anno=#a{anno=[L]}, - args=[E2],clauses=[],fc=Fc},Eps,St}; - _Other -> - {#imatch{anno=#a{anno=[L]},pat=P2,arg=E2,fc=Fc},Eps,St2} - end; -expr({op,_,'++',{lc,Llc,E,Qs},L2}, St) -> - %% Optimise this here because of the list comprehension algorithm. - lc_tq(Llc, E, Qs, L2, St); -expr({op,L,Op,A0}, St0) -> - {A1,Aps,St1} = safe(A0, St0), - LineAnno = [L], - {#icall{anno=#a{anno=LineAnno}, %Must have an #a{} - module=#c_atom{anno=LineAnno,val=erlang}, - name=#c_atom{anno=LineAnno,val=Op},args=[A1]},Aps,St1}; -expr({op,L,Op,L0,R0}, St0) -> - {As,Aps,St1} = safe_list([L0,R0], St0), - LineAnno = [L], - {#icall{anno=#a{anno=LineAnno}, %Must have an #a{} - module=#c_atom{anno=LineAnno,val=erlang}, - name=#c_atom{anno=LineAnno,val=Op},args=As},Aps,St1}. - -%% try_exception([ExcpClause], St) -> {[ExcpVar],Handler,St}. - -try_exception(Ecs0, St0) -> - %% Note that Tag is not needed for rethrow - it is already in Info. - {Evs,St1} = new_vars(3, St0), % Tag, Value, Info - {Ecs1,St2} = clauses(Ecs0, St1), - [_,Value,Info] = Evs, - Ec = #iclause{anno=#a{anno=[compiler_generated]}, - pats=[#c_tuple{es=Evs}],guard=[#c_atom{val=true}], - body=[#iprimop{anno=#a{}, %Must have an #a{} - name=#c_atom{val=raise}, - args=[Info,Value]}]}, - Hs = [#icase{anno=#a{},args=[#c_tuple{es=Evs}],clauses=Ecs1,fc=Ec}], - {Evs,Hs,St2}. - -try_after(As, St0) -> - %% See above. - {Evs,St1} = new_vars(3, St0), % Tag, Value, Info - [_,Value,Info] = Evs, - B = As ++ [#iprimop{anno=#a{}, %Must have an #a{} - name=#c_atom{val=raise}, - args=[Info,Value]}], - Ec = #iclause{anno=#a{anno=[compiler_generated]}, - pats=[#c_tuple{es=Evs}],guard=[#c_atom{val=true}], - body=B}, - Hs = [#icase{anno=#a{},args=[#c_tuple{es=Evs}],clauses=[],fc=Ec}], - {Evs,Hs,St1}. - -%% expr_bin([ArgExpr], St) -> {[Arg],[PreExpr],St}. -%% Flatten the arguments of a bin. Do this straight left to right! - -expr_bin(Es, St) -> - foldr(fun (E, {Ces,Esp,St0}) -> - {Ce,Ep,St1} = bitstr(E, St0), - {[Ce|Ces],Ep ++ Esp,St1} - end, {[],[],St}, Es). - -bitstr({bin_element,_,E0,Size0,[Type,{unit,Unit}|Flags]}, St0) -> - {E1,Eps,St1} = safe(E0, St0), - {Size1,Eps2,St2} = safe(Size0, St1), - {#c_bitstr{val=E1,size=Size1, - unit=core_lib:make_literal(Unit), - type=core_lib:make_literal(Type), - flags=core_lib:make_literal(Flags)}, - Eps ++ Eps2,St2}. - -%% fun_tq(Id, [Clauses], Line, State) -> {Fun,[PreExp],State}. - -fun_tq(Id, Cs0, L, St0) -> - {Cs1,St1} = clauses(Cs0, St0), - Arity = length((hd(Cs1))#iclause.pats), - {Args,St2} = new_vars(Arity, St1), - {Ps,St3} = new_vars(Arity, St2), %Need new variables here - Fc = fail_clause(Ps, #c_tuple{es=[#c_atom{val=function_clause}|Ps]}), - Fun = #ifun{anno=#a{anno=[L]}, - id=[{id,Id}], %We KNOW! - vars=Args,clauses=Cs1,fc=Fc}, - {Fun,[],St3}. - -%% lc_tq(Line, Exp, [Qualifier], More, State) -> {LetRec,[PreExp],State}. -%% This TQ from Simon PJ pp 127-138. -%% This gets a bit messy as we must transform all directly here. We -%% recognise guard tests and try to fold them together and join to a -%% preceding generators, this should give us better and more compact -%% code. -%% More could be transformed before calling lc_tq. - -lc_tq(Line, E, [{generate,Lg,P,G}|Qs0], More, St0) -> - {Gs,Qs1} = splitwith(fun is_guard_test/1, Qs0), - {Name,St1} = new_fun_name("lc", St0), - {Head,St2} = new_var(St1), - {Tname,St3} = new_var_name(St2), - LA = [Line], - LAnno = #a{anno=LA}, - Tail = #c_var{anno=LA,name=Tname}, - {Arg,St4} = new_var(St3), - NewMore = {call,Lg,{atom,Lg,Name},[{var,Lg,Tname}]}, - {Guardc,St5} = lc_guard_tests(Gs, St4), %These are always flat! - {Lc,Lps,St6} = lc_tq(Line, E, Qs1, NewMore, St5), - {Mc,Mps,St7} = expr(More, St6), - {Nc,Nps,St8} = expr(NewMore, St7), - case catch pattern(P) of - {'EXIT',_}=Exit -> - St9 = St8, - Pc = nomatch, - exit(Exit); %Propagate error - nomatch -> - St9 = add_warning(Line, nomatch, St8), - Pc = nomatch; - Pc -> - St9 = St8 - end, - {Gc,Gps,St10} = safe(G, St9), %Will be a function argument! - Fc = fail_clause([Arg], #c_tuple{anno=LA, - es=[#c_atom{val=function_clause},Arg]}), - Cs0 = [#iclause{anno=#a{anno=[compiler_generated|LA]}, - pats=[#c_cons{anno=LA,hd=Head,tl=Tail}], - guard=[], - body=Nps ++ [Nc]}, - #iclause{anno=LAnno, - pats=[#c_nil{anno=LA}],guard=[], - body=Mps ++ [Mc]}], - Cs = case Pc of - nomatch -> Cs0; - _ -> - [#iclause{anno=LAnno, - pats=[#c_cons{anno=LA,hd=Pc,tl=Tail}], - guard=Guardc, - body=Lps ++ [Lc]}|Cs0] - end, - Fun = #ifun{anno=LAnno,id=[],vars=[Arg],clauses=Cs,fc=Fc}, - {#iletrec{anno=LAnno,defs=[{Name,Fun}], - body=Gps ++ [#iapply{anno=LAnno, - op=#c_fname{anno=LA,id=Name,arity=1}, - args=[Gc]}]}, - [],St10}; -lc_tq(Line, E, [Fil0|Qs0], More, St0) -> - %% Special case sequences guard tests. - LA = [Line], - LAnno = #a{anno=LA}, - case is_guard_test(Fil0) of - true -> - {Gs0,Qs1} = splitwith(fun is_guard_test/1, Qs0), - {Lc,Lps,St1} = lc_tq(Line, E, Qs1, More, St0), - {Mc,Mps,St2} = expr(More, St1), - {Gs,St3} = lc_guard_tests([Fil0|Gs0], St2), %These are always flat! - {#icase{anno=LAnno, - args=[], - clauses=[#iclause{anno=LAnno,pats=[], - guard=Gs,body=Lps ++ [Lc]}], - fc=#iclause{anno=LAnno,pats=[],guard=[],body=Mps ++ [Mc]}}, - [],St3}; - false -> - {Lc,Lps,St1} = lc_tq(Line, E, Qs0, More, St0), - {Mc,Mps,St2} = expr(More, St1), - {Fpat,St3} = new_var(St2), - Fc = fail_clause([Fpat], #c_tuple{es=[#c_atom{val=case_clause},Fpat]}), - %% Do a novars little optimisation here. - case Fil0 of - {op,_,'not',Fil1} -> - {Filc,Fps,St4} = novars(Fil1, St3), - {#icase{anno=LAnno, - args=[Filc], - clauses=[#iclause{anno=LAnno, - pats=[#c_atom{anno=LA,val=true}], - guard=[], - body=Mps ++ [Mc]}, - #iclause{anno=LAnno, - pats=[#c_atom{anno=LA,val=false}], - guard=[], - body=Lps ++ [Lc]}], - fc=Fc}, - Fps,St4}; - _Other -> - {Filc,Fps,St4} = novars(Fil0, St3), - {#icase{anno=LAnno, - args=[Filc], - clauses=[#iclause{anno=LAnno, - pats=[#c_atom{anno=LA,val=true}], - guard=[], - body=Lps ++ [Lc]}, - #iclause{anno=LAnno, - pats=[#c_atom{anno=LA,val=false}], - guard=[], - body=Mps ++ [Mc]}], - fc=Fc}, - Fps,St4} - end - end; -lc_tq(Line, E, [], More, St) -> - expr({cons,Line,E,More}, St). - -lc_guard_tests([], St) -> {[],St}; -lc_guard_tests(Gs0, St) -> - Gs = guard_tests(Gs0), - gexpr_top(Gs, St). - -%% is_guard_test(Expression) -> true | false. -%% Test if a general expression is a guard test. Use erl_lint here -%% as it now allows sys_pre_expand transformed source. - -is_guard_test(E) -> erl_lint:is_guard_test(E). - -%% novars(Expr, State) -> {Novars,[PreExpr],State}. -%% Generate a novars expression, basically a call or a safe. At this -%% level we do not need to do a deep check. - -novars(E0, St0) -> - {E1,Eps,St1} = expr(E0, St0), - {Se,Sps,St2} = force_novars(E1, St1), - {Se,Eps ++ Sps,St2}. - -force_novars(#iapply{}=App, St) -> {App,[],St}; -force_novars(#icall{}=Call, St) -> {Call,[],St}; -force_novars(#iprimop{}=Prim, St) -> {Prim,[],St}; -force_novars(#ifun{}=Fun, St) -> {Fun,[],St}; %These are novars too -force_novars(#ibinary{}=Bin, St) -> {Bin,[],St}; -force_novars(Ce, St) -> - force_safe(Ce, St). - -%% safe(Expr, State) -> {Safe,[PreExpr],State}. -%% Generate an internal safe expression. These are simples without -%% binaries which can fail. At this level we do not need to do a -%% deep check. Must do special things with matches here. - -safe(E0, St0) -> - {E1,Eps,St1} = expr(E0, St0), - {Se,Sps,St2} = force_safe(E1, St1), - {Se,Eps ++ Sps,St2}. - -safe_list(Es, St) -> - foldr(fun (E, {Ces,Esp,St0}) -> - {Ce,Ep,St1} = safe(E, St0), - {[Ce|Ces],Ep ++ Esp,St1} - end, {[],[],St}, Es). - -force_safe(#imatch{anno=Anno,pat=P,arg=E,fc=Fc}, St0) -> - {Le,Lps,St1} = force_safe(E, St0), - {Le,Lps ++ [#imatch{anno=Anno,pat=P,arg=Le,fc=Fc}],St1}; -force_safe(Ce, St0) -> - case is_safe(Ce) of - true -> {Ce,[],St0}; - false -> - {V,St1} = new_var(St0), - {V,[#iset{var=V,arg=Ce}],St1} - end. - -is_safe(#c_cons{}) -> true; -is_safe(#c_tuple{}) -> true; -is_safe(#c_var{}) -> true; -is_safe(E) -> core_lib:is_atomic(E). - -%%% %% variable(Expr, State) -> {Variable,[PreExpr],State}. -%%% %% force_variable(Expr, State) -> {Variable,[PreExpr],State}. -%%% %% Generate a variable. - -%%% variable(E0, St0) -> -%%% {E1,Eps,St1} = expr(E0, St0), -%%% {V,Vps,St2} = force_variable(E1, St1), -%%% {V,Eps ++ Vps,St2}. - -%%% force_variable(#c_var{}=Var, St) -> {Var,[],St}; -%%% force_variable(Ce, St0) -> -%%% {V,St1} = new_var(St0), -%%% {V,[#iset{var=V,arg=Ce}],St1}. - -%%% %% atomic(Expr, State) -> {Atomic,[PreExpr],State}. -%%% %% force_atomic(Expr, State) -> {Atomic,[PreExpr],State}. - -%%% atomic(E0, St0) -> -%%% {E1,Eps,St1} = expr(E0, St0), -%%% {A,Aps,St2} = force_atomic(E1, St1), -%%% {A,Eps ++ Aps,St2}. - -%%% force_atomic(Ce, St0) -> -%%% case core_lib:is_atomic(Ce) of -%%% true -> {Ce,[],St0}; -%%% false -> -%%% {V,St1} = new_var(St0), -%%% {V,[#iset{var=V,arg=Ce}],St1} -%%% end. - -%% fold_match(MatchExpr, Pat) -> {MatchPat,Expr}. -%% Fold nested matches into one match with aliased patterns. - -fold_match({match,L,P0,E0}, P) -> - {P1,E1} = fold_match(E0, P), - {{match,L,P0,P1},E1}; -fold_match(E, P) -> {P,E}. - -%% pattern(Pattern) -> CorePat. -%% Transform a pattern by removing line numbers. We also normalise -%% aliases in patterns to standard form, {alias,Pat,[Var]}. - -pattern({var,L,V}) -> #c_var{anno=[L],name=V}; -pattern({char,L,C}) -> #c_char{anno=[L],val=C}; -pattern({integer,L,I}) -> #c_int{anno=[L],val=I}; -pattern({float,L,F}) -> #c_float{anno=[L],val=F}; -pattern({atom,L,A}) -> #c_atom{anno=[L],val=A}; -pattern({string,L,S}) -> #c_string{anno=[L],val=S}; -pattern({nil,L}) -> #c_nil{anno=[L]}; -pattern({cons,L,H,T}) -> - #c_cons{anno=[L],hd=pattern(H),tl=pattern(T)}; -pattern({tuple,L,Ps}) -> - #c_tuple{anno=[L],es=pattern_list(Ps)}; -pattern({bin,L,Ps}) -> - %% We don't create a #ibinary record here, since there is - %% no need to hold any used/new annoations in a pattern. - #c_binary{anno=[L],segments=pat_bin(Ps)}; -pattern({match,_,P1,P2}) -> - pat_alias(pattern(P1), pattern(P2)). - -%% bin_pattern_list([BinElement]) -> [BinSeg]. - -pat_bin(Ps) -> map(fun pat_segment/1, Ps). - -pat_segment({bin_element,_,Term,Size,[Type,{unit,Unit}|Flags]}) -> - #c_bitstr{val=pattern(Term),size=pattern(Size), - unit=core_lib:make_literal(Unit), - type=core_lib:make_literal(Type), - flags=core_lib:make_literal(Flags)}. - -%% pat_alias(CorePat, CorePat) -> AliasPat. -%% Normalise aliases. Trap bad aliases by throwing 'nomatch'. - -pat_alias(#c_var{name=V1}, P2) -> #c_alias{var=#c_var{name=V1},pat=P2}; -pat_alias(P1, #c_var{name=V2}) -> #c_alias{var=#c_var{name=V2},pat=P1}; -pat_alias(#c_cons{}=Cons, #c_string{anno=A,val=[H|T]}=S) -> - pat_alias(Cons, #c_cons{anno=A,hd=#c_char{anno=A,val=H}, - tl=S#c_string{val=T}}); -pat_alias(#c_string{anno=A,val=[H|T]}=S, #c_cons{}=Cons) -> - pat_alias(#c_cons{anno=A,hd=#c_char{anno=A,val=H}, - tl=S#c_string{val=T}}, Cons); -pat_alias(#c_nil{}=Nil, #c_string{val=[]}) -> - Nil; -pat_alias(#c_string{val=[]}, #c_nil{}=Nil) -> - Nil; -pat_alias(#c_cons{anno=A,hd=H1,tl=T1}, #c_cons{hd=H2,tl=T2}) -> - #c_cons{anno=A,hd=pat_alias(H1, H2),tl=pat_alias(T1, T2)}; -pat_alias(#c_tuple{es=Es1}, #c_tuple{es=Es2}) -> - #c_tuple{es=pat_alias_list(Es1, Es2)}; -pat_alias(#c_char{val=C}=Char, #c_int{val=C}) -> - Char; -pat_alias(#c_int{val=C}, #c_char{val=C}=Char) -> - Char; -pat_alias(#c_alias{var=V1,pat=P1}, - #c_alias{var=V2,pat=P2}) -> - if V1 == V2 -> pat_alias(P1, P2); - true -> #c_alias{var=V1,pat=#c_alias{var=V2,pat=pat_alias(P1, P2)}} - end; -pat_alias(#c_alias{var=V1,pat=P1}, P2) -> - #c_alias{var=V1,pat=pat_alias(P1, P2)}; -pat_alias(P1, #c_alias{var=V2,pat=P2}) -> - #c_alias{var=V2,pat=pat_alias(P1, P2)}; -pat_alias(P, P) -> P; -pat_alias(_, _) -> throw(nomatch). - -%% pat_alias_list([A1], [A2]) -> [A]. - -pat_alias_list([A1|A1s], [A2|A2s]) -> - [pat_alias(A1, A2)|pat_alias_list(A1s, A2s)]; -pat_alias_list([], []) -> []; -pat_alias_list(_, _) -> throw(nomatch). - -%% pattern_list([P]) -> [P]. - -pattern_list(Ps) -> map(fun pattern/1, Ps). - -%% first([A]) -> [A]. -%% last([A]) -> A. - -first([_]) -> []; -first([H|T]) -> [H|first(T)]. - -last([L]) -> L; -last([_|T]) -> last(T). - -%% make_vars([Name]) -> [{Var,Name}]. - -make_vars(Vs) -> [ #c_var{name=V} || V <- Vs ]. - -%% new_fun_name(Type, State) -> {FunName,State}. - -new_fun_name(Type, #core{fcount=C}=St) -> - {list_to_atom(Type ++ "$^" ++ integer_to_list(C)),St#core{fcount=C+1}}. - -%% new_var_name(State) -> {VarName,State}. - -new_var_name(#core{vcount=C}=St) -> - {list_to_atom("cor" ++ integer_to_list(C)),St#core{vcount=C + 1}}. - -%% new_var(State) -> {{var,Name},State}. -%% new_var(LineAnno, State) -> {{var,Name},State}. - -new_var(St) -> - new_var([], St). - -new_var(Anno, St0) -> - {New,St} = new_var_name(St0), - {#c_var{anno=Anno,name=New},St}. - -%% new_vars(Count, State) -> {[Var],State}. -%% new_vars(Anno, Count, State) -> {[Var],State}. -%% Make Count new variables. - -new_vars(N, St) -> new_vars_1(N, [], St, []). -new_vars(Anno, N, St) -> new_vars_1(N, Anno, St, []). - -new_vars_1(N, Anno, St0, Vs) when N > 0 -> - {V,St1} = new_var(Anno, St0), - new_vars_1(N-1, Anno, St1, [V|Vs]); -new_vars_1(0, _, St, Vs) -> {Vs,St}. - -fail_clause(Pats, A) -> - #iclause{anno=#a{anno=[compiler_generated]}, - pats=Pats,guard=[], - body=[#iprimop{anno=#a{},name=#c_atom{val=match_fail},args=[A]}]}. - -ubody(B, St) -> uexpr(B, [], St). - -%% uclauses([Lclause], [KnownVar], State) -> {[Lclause],State}. - -uclauses(Lcs, Ks, St0) -> - mapfoldl(fun (Lc, St) -> uclause(Lc, Ks, St) end, St0, Lcs). - -%% uclause(Lclause, [KnownVar], State) -> {Lclause,State}. - -uclause(Cl0, Ks, St0) -> - {Cl1,_Pvs,Used,New,St1} = uclause(Cl0, Ks, Ks, St0), - A0 = get_ianno(Cl1), - A = A0#a{us=Used,ns=New}, - {Cl1#iclause{anno=A},St1}. - -uclause(#iclause{anno=Anno,pats=Ps0,guard=G0,body=B0}, Pks, Ks0, St0) -> - {Ps1,Pg,Pvs,Pus,St1} = upattern_list(Ps0, Pks, St0), - Pu = union(Pus, intersection(Pvs, Ks0)), - Pn = subtract(Pvs, Pu), - Ks1 = union(Pn, Ks0), - {G1,St2} = uguard(Pg, G0, Ks1, St1), - Gu = used_in_any(G1), - Gn = new_in_any(G1), - Ks2 = union(Gn, Ks1), - {B1,St3} = uexprs(B0, Ks2, St2), - Used = intersection(union([Pu,Gu,used_in_any(B1)]), Ks0), - New = union([Pn,Gn,new_in_any(B1)]), - {#iclause{anno=Anno,pats=Ps1,guard=G1,body=B1},Pvs,Used,New,St3}. - -%% uguard([Test], [Kexpr], [KnownVar], State) -> {[Kexpr],State}. -%% Build a guard expression list by folding in the equality tests. - -uguard([], [], _, St) -> {[],St}; -uguard(Pg, [], Ks, St) -> - %% No guard, so fold together equality tests. - uguard(first(Pg), [last(Pg)], Ks, St); -uguard(Pg, Gs0, Ks, St0) -> - %% Gs0 must contain at least one element here. - {Gs3,St5} = foldr(fun (T, {Gs1,St1}) -> - {L,St2} = new_var(St1), - {R,St3} = new_var(St2), - {[#iset{var=L,arg=T}] ++ first(Gs1) ++ - [#iset{var=R,arg=last(Gs1)}, - #icall{anno=#a{}, %Must have an #a{} - module=#c_atom{val=erlang}, - name=#c_atom{val='and'}, - args=[L,R]}], - St3} - end, {Gs0,St0}, Pg), - %%ok = io:fwrite("core ~w: ~p~n", [?LINE,Gs3]), - uexprs(Gs3, Ks, St5). - -%% uexprs([Kexpr], [KnownVar], State) -> {[Kexpr],State}. - -uexprs([#imatch{anno=A,pat=P0,arg=Arg,fc=Fc}|Les], Ks, St0) -> - %% Optimise for simple set of unbound variable. - case upattern(P0, Ks, St0) of - {#c_var{},[],_Pvs,_Pus,_} -> - %% Throw our work away and just set to iset. - uexprs([#iset{var=P0,arg=Arg}|Les], Ks, St0); - _Other -> - %% Throw our work away and set to icase. - if - Les == [] -> - %% Need to explicitly return match "value", make - %% safe for efficiency. - {La,Lps,St1} = force_safe(Arg, St0), - Mc = #iclause{anno=A,pats=[P0],guard=[],body=[La]}, - uexprs(Lps ++ [#icase{anno=A, - args=[La],clauses=[Mc],fc=Fc}], Ks, St1); - true -> - Mc = #iclause{anno=A,pats=[P0],guard=[],body=Les}, - uexprs([#icase{anno=A,args=[Arg], - clauses=[Mc],fc=Fc}], Ks, St0) - end - end; -uexprs([Le0|Les0], Ks, St0) -> - {Le1,St1} = uexpr(Le0, Ks, St0), - {Les1,St2} = uexprs(Les0, union((core_lib:get_anno(Le1))#a.ns, Ks), St1), - {[Le1|Les1],St2}; -uexprs([], _, St) -> {[],St}. - -uexpr(#iset{anno=A,var=V,arg=A0}, Ks, St0) -> - {A1,St1} = uexpr(A0, Ks, St0), - {#iset{anno=A#a{us=del_element(V#c_var.name, (core_lib:get_anno(A1))#a.us), - ns=add_element(V#c_var.name, (core_lib:get_anno(A1))#a.ns)}, - var=V,arg=A1},St1}; -%% imatch done in uexprs. -uexpr(#iletrec{anno=A,defs=Fs0,body=B0}, Ks, St0) -> - %%ok = io:fwrite("~w: ~p~n", [?LINE,{Fs0,B0}]), - {Fs1,St1} = mapfoldl(fun ({Name,F0}, St0) -> - {F1,St1} = uexpr(F0, Ks, St0), - {{Name,F1},St1} - end, St0, Fs0), - {B1,St2} = uexprs(B0, Ks, St1), - Used = used_in_any(map(fun ({_,F}) -> F end, Fs1) ++ B1), - {#iletrec{anno=A#a{us=Used,ns=[]},defs=Fs1,body=B1},St2}; -uexpr(#icase{anno=A,args=As0,clauses=Cs0,fc=Fc0}, Ks, St0) -> - %% As0 will never generate new variables. - {As1,St1} = uexpr_list(As0, Ks, St0), - {Cs1,St2} = uclauses(Cs0, Ks, St1), - {Fc1,St3} = uclause(Fc0, Ks, St2), - Used = union(used_in_any(As1), used_in_any(Cs1)), - New = new_in_all(Cs1), - {#icase{anno=A#a{us=Used,ns=New},args=As1,clauses=Cs1,fc=Fc1},St3}; -uexpr(#ifun{anno=A,id=Id,vars=As,clauses=Cs0,fc=Fc0}, Ks0, St0) -> - Avs = lit_list_vars(As), - Ks1 = union(Avs, Ks0), - {Cs1,St1} = ufun_clauses(Cs0, Ks1, St0), - {Fc1,St2} = ufun_clause(Fc0, Ks1, St1), - Used = subtract(intersection(used_in_any(Cs1), Ks0), Avs), - {#ifun{anno=A#a{us=Used,ns=[]},id=Id,vars=As,clauses=Cs1,fc=Fc1},St2}; -uexpr(#iapply{anno=A,op=Op,args=As}, _, St) -> - Used = union(lit_vars(Op), lit_list_vars(As)), - {#iapply{anno=A#a{us=Used},op=Op,args=As},St}; -uexpr(#iprimop{anno=A,name=Name,args=As}, _, St) -> - Used = lit_list_vars(As), - {#iprimop{anno=A#a{us=Used},name=Name,args=As},St}; -uexpr(#icall{anno=A,module=Mod,name=Name,args=As}, _, St) -> - Used = union([lit_vars(Mod),lit_vars(Name),lit_list_vars(As)]), - {#icall{anno=A#a{us=Used},module=Mod,name=Name,args=As},St}; -uexpr(#itry{anno=A,args=As0,vars=Vs,body=Bs0,evars=Evs,handler=Hs0}, Ks, St0) -> - %% Note that we export only from body and exception. - {As1,St1} = uexprs(As0, Ks, St0), - {Bs1,St2} = uexprs(Bs0, Ks, St1), - {Hs1,St3} = uexprs(Hs0, Ks, St2), - Used = intersection(used_in_any(Bs1++Hs1++As1), Ks), - New = new_in_all(Bs1++Hs1), - {#itry{anno=A#a{us=Used,ns=New}, - args=As1,vars=Vs,body=Bs1,evars=Evs,handler=Hs1},St3}; -uexpr(#icatch{anno=A,body=Es0}, Ks, St0) -> - {Es1,St1} = uexprs(Es0, Ks, St0), - {#icatch{anno=A#a{us=used_in_any(Es1)},body=Es1},St1}; -uexpr(#ireceive1{anno=A,clauses=Cs0}, Ks, St0) -> - {Cs1,St1} = uclauses(Cs0, Ks, St0), - {#ireceive1{anno=A#a{us=used_in_any(Cs1),ns=new_in_all(Cs1)}, - clauses=Cs1},St1}; -uexpr(#ireceive2{anno=A,clauses=Cs0,timeout=Te0,action=Tes0}, Ks, St0) -> - %% Te0 will never generate new variables. - {Te1,St1} = uexpr(Te0, Ks, St0), - {Cs1,St2} = uclauses(Cs0, Ks, St1), - {Tes1,St3} = uexprs(Tes0, Ks, St2), - Used = union([used_in_any(Cs1),used_in_any(Tes1), - (core_lib:get_anno(Te1))#a.us]), - New = case Cs1 of - [] -> new_in_any(Tes1); - _ -> intersection(new_in_all(Cs1), new_in_any(Tes1)) - end, - {#ireceive2{anno=A#a{us=Used,ns=New}, - clauses=Cs1,timeout=Te1,action=Tes1},St3}; -uexpr(#iprotect{anno=A,body=Es0}, Ks, St0) -> - {Es1,St1} = uexprs(Es0, Ks, St0), - Used = used_in_any(Es1), - {#iprotect{anno=A#a{us=Used},body=Es1},St1}; %No new variables escape! -uexpr(#ibinary{anno=A,segments=Ss}, _, St) -> - Used = bitstr_vars(Ss), - {#ibinary{anno=A#a{us=Used},segments=Ss},St}; -uexpr(Lit, _, St) -> - true = core_lib:is_simple(Lit), %Sanity check! - Vs = lit_vars(Lit), - Anno = core_lib:get_anno(Lit), - {core_lib:set_anno(Lit, #a{us=Vs,anno=Anno}),St}. - -uexpr_list(Les0, Ks, St0) -> - mapfoldl(fun (Le, St) -> uexpr(Le, Ks, St) end, St0, Les0). - -%% ufun_clauses([Lclause], [KnownVar], State) -> {[Lclause],State}. - -ufun_clauses(Lcs, Ks, St0) -> - mapfoldl(fun (Lc, St) -> ufun_clause(Lc, Ks, St) end, St0, Lcs). - -%% ufun_clause(Lclause, [KnownVar], State) -> {Lclause,State}. - -ufun_clause(Cl0, Ks, St0) -> - {Cl1,Pvs,Used,_,St1} = uclause(Cl0, [], Ks, St0), - A0 = get_ianno(Cl1), - A = A0#a{us=subtract(intersection(Used, Ks), Pvs),ns=[]}, - {Cl1#iclause{anno=A},St1}. - -%% upattern(Pat, [KnownVar], State) -> -%% {Pat,[GuardTest],[NewVar],[UsedVar],State}. - -upattern(#c_var{name='_'}, _, St0) -> - {New,St1} = new_var_name(St0), - {#c_var{name=New},[],[New],[],St1}; -upattern(#c_var{name=V}=Var, Ks, St0) -> - case is_element(V, Ks) of - true -> - {N,St1} = new_var_name(St0), - New = #c_var{name=N}, - Test = #icall{anno=#a{us=add_element(N, [V])}, - module=#c_atom{val=erlang}, - name=#c_atom{val='=:='}, - args=[New,Var]}, - %% Test doesn't need protecting. - {New,[Test],[N],[],St1}; - false -> {Var,[],[V],[],St0} - end; -upattern(#c_cons{hd=H0,tl=T0}=Cons, Ks, St0) -> - {H1,Hg,Hv,Hu,St1} = upattern(H0, Ks, St0), - {T1,Tg,Tv,Tu,St2} = upattern(T0, union(Hv, Ks), St1), - {Cons#c_cons{hd=H1,tl=T1},Hg ++ Tg,union(Hv, Tv),union(Hu, Tu),St2}; -upattern(#c_tuple{es=Es0}=Tuple, Ks, St0) -> - {Es1,Esg,Esv,Eus,St1} = upattern_list(Es0, Ks, St0), - {Tuple#c_tuple{es=Es1},Esg,Esv,Eus,St1}; -upattern(#c_binary{segments=Es0}=Bin, Ks, St0) -> - {Es1,Esg,Esv,Eus,St1} = upat_bin(Es0, Ks, St0), - {Bin#c_binary{segments=Es1},Esg,Esv,Eus,St1}; -upattern(#c_alias{var=V0,pat=P0}=Alias, Ks, St0) -> - {V1,Vg,Vv,Vu,St1} = upattern(V0, Ks, St0), - {P1,Pg,Pv,Pu,St2} = upattern(P0, union(Vv, Ks), St1), - {Alias#c_alias{var=V1,pat=P1},Vg ++ Pg,union(Vv, Pv),union(Vu, Pu),St2}; -upattern(Other, _, St) -> {Other,[],[],[],St}. %Constants - -%% upattern_list([Pat], [KnownVar], State) -> -%% {[Pat],[GuardTest],[NewVar],[UsedVar],State}. - -upattern_list([P0|Ps0], Ks, St0) -> - {P1,Pg,Pv,Pu,St1} = upattern(P0, Ks, St0), - {Ps1,Psg,Psv,Psu,St2} = upattern_list(Ps0, union(Pv, Ks), St1), - {[P1|Ps1],Pg ++ Psg,union(Pv, Psv),union(Pu, Psu),St2}; -upattern_list([], _, St) -> {[],[],[],[],St}. - -%% upat_bin([Pat], [KnownVar], State) -> -%% {[Pat],[GuardTest],[NewVar],[UsedVar],State}. -upat_bin(Es0, Ks, St0) -> - upat_bin(Es0, Ks, [], St0). - -%% upat_bin([Pat], [KnownVar], [LocalVar], State) -> -%% {[Pat],[GuardTest],[NewVar],[UsedVar],State}. -upat_bin([P0|Ps0], Ks, Bs, St0) -> - {P1,Pg,Pv,Pu,Bs1,St1} = upat_element(P0, Ks, Bs, St0), - {Ps1,Psg,Psv,Psu,St2} = upat_bin(Ps0, union(Pv, Ks), Bs1, St1), - {[P1|Ps1],Pg ++ Psg,union(Pv, Psv),union(Pu, Psu),St2}; -upat_bin([], _, _, St) -> {[],[],[],[],St}. - - -%% upat_element(Segment, [KnownVar], [LocalVar], State) -> -%% {Segment,[GuardTest],[NewVar],[UsedVar],[LocalVar],State} -upat_element(#c_bitstr{val=H0,size=Sz}=Seg, Ks, Bs, St0) -> - {H1,Hg,Hv,[],St1} = upattern(H0, Ks, St0), - Bs1 = case H0 of - #c_var{name=Hname} -> - case H1 of - #c_var{name=Hname} -> - Bs; - #c_var{name=Other} -> - [{Hname, Other}|Bs] - end; - _ -> - Bs - end, - {Sz1, Us} = case Sz of - #c_var{name=Vname} -> - rename_bitstr_size(Vname, Bs); - _Other -> {Sz, []} - end, - {Seg#c_bitstr{val=H1, size=Sz1},Hg,Hv,Us,Bs1,St1}. - -rename_bitstr_size(V, [{V, N}|_]) -> - New = #c_var{name=N}, - {New, [N]}; -rename_bitstr_size(V, [_|Rest]) -> - rename_bitstr_size(V, Rest); -rename_bitstr_size(V, []) -> - Old = #c_var{name=V}, - {Old, [V]}. - -used_in_any(Les) -> - foldl(fun (Le, Ns) -> union((core_lib:get_anno(Le))#a.us, Ns) end, - [], Les). - -new_in_any(Les) -> - foldl(fun (Le, Ns) -> union((core_lib:get_anno(Le))#a.ns, Ns) end, - [], Les). - -new_in_all([Le|Les]) -> - foldl(fun (L, Ns) -> intersection((core_lib:get_anno(L))#a.ns, Ns) end, - (core_lib:get_anno(Le))#a.ns, Les); -new_in_all([]) -> []. - -%% The AfterVars are the variables which are used afterwards. We need -%% this to work out which variables are actually exported and used -%% from case/receive. In subblocks/clauses the AfterVars of the block -%% are just the exported variables. - -cbody(B0, St0) -> - {B1,_,_,St1} = cexpr(B0, [], St0), - {B1,St1}. - -%% cclause(Lclause, [AfterVar], State) -> {Cclause,State}. -%% The AfterVars are the exported variables. - -cclause(#iclause{anno=#a{anno=Anno},pats=Ps,guard=G0,body=B0}, Exp, St0) -> - {B1,_Us1,St1} = cexprs(B0, Exp, St0), - {G1,St2} = cguard(G0, St1), - {#c_clause{anno=Anno,pats=Ps,guard=G1,body=B1},St2}. - -cclauses(Lcs, Es, St0) -> - mapfoldl(fun (Lc, St) -> cclause(Lc, Es, St) end, St0, Lcs). - -cguard([], St) -> {#c_atom{val=true},St}; -cguard(Gs, St0) -> - {G,_,St1} = cexprs(Gs, [], St0), - {G,St1}. - -%% cexprs([Lexpr], [AfterVar], State) -> {Cexpr,[AfterVar],State}. -%% Must be sneaky here at the last expr when combining exports for the -%% whole sequence and exports for that expr. - -cexprs([#iset{var=#c_var{name=Name}=Var}=Iset], As, St) -> - %% Make return value explicit, and make Var true top level. - cexprs([Iset,Var#c_var{anno=#a{us=[Name]}}], As, St); -cexprs([Le], As, St0) -> - {Ce,Es,Us,St1} = cexpr(Le, As, St0), - Exp = make_vars(As), %The export variables - if - Es == [] -> {core_lib:make_values([Ce|Exp]),union(Us, As),St1}; - true -> - {R,St2} = new_var(St1), - {#c_let{anno=get_lineno_anno(Ce), - vars=[R|make_vars(Es)],arg=Ce, - body=core_lib:make_values([R|Exp])}, - union(Us, As),St2} - end; -cexprs([#iset{anno=#a{anno=A},var=V,arg=A0}|Les], As0, St0) -> - {Ces,As1,St1} = cexprs(Les, As0, St0), - {A1,Es,Us,St2} = cexpr(A0, As1, St1), - {#c_let{anno=A,vars=[V|make_vars(Es)],arg=A1,body=Ces}, - union(Us, As1),St2}; -cexprs([Le|Les], As0, St0) -> - {Ces,As1,St1} = cexprs(Les, As0, St0), - {Ce,Es,Us,St2} = cexpr(Le, As1, St1), - if - Es == [] -> - {#c_seq{arg=Ce,body=Ces},union(Us, As1),St2}; - true -> - {R,St3} = new_var(St2), - {#c_let{vars=[R|make_vars(Es)],arg=Ce,body=Ces}, - union(Us, As1),St3} - end. - -%% cexpr(Lexpr, [AfterVar], State) -> {Cexpr,[ExpVar],[UsedVar],State}. - -cexpr(#iletrec{anno=A,defs=Fs0,body=B0}, As, St0) -> - {Fs1,{_,St1}} = mapfoldl(fun ({Name,F0}, {Used,St0}) -> - {F1,[],Us,St1} = cexpr(F0, [], St0), - {#c_def{name=#c_fname{id=Name,arity=1}, - val=F1}, - {union(Us, Used),St1}} - end, {[],St0}, Fs0), - Exp = intersection(A#a.ns, As), - {B1,_Us,St2} = cexprs(B0, Exp, St1), - {#c_letrec{anno=A#a.anno,defs=Fs1,body=B1},Exp,A#a.us,St2}; -cexpr(#icase{anno=A,args=Largs,clauses=Lcs,fc=Lfc}, As, St0) -> - Exp = intersection(A#a.ns, As), %Exports - {Cargs,St1} = foldr(fun (La, {Cas,Sta}) -> - {Ca,[],_Us1,Stb} = cexpr(La, As, Sta), - {[Ca|Cas],Stb} - end, {[],St0}, Largs), - {Ccs,St2} = cclauses(Lcs, Exp, St1), - {Cfc,St3} = cclause(Lfc, [], St2), %Never exports - {#c_case{anno=A#a.anno, - arg=core_lib:make_values(Cargs),clauses=Ccs ++ [Cfc]}, - Exp,A#a.us,St3}; -cexpr(#ireceive1{anno=A,clauses=Lcs}, As, St0) -> - Exp = intersection(A#a.ns, As), %Exports - {Ccs,St1} = cclauses(Lcs, Exp, St0), - {#c_receive{anno=A#a.anno, - clauses=Ccs, - timeout=#c_atom{val=infinity},action=#c_atom{val=true}}, - Exp,A#a.us,St1}; -cexpr(#ireceive2{anno=A,clauses=Lcs,timeout=Lto,action=Les}, As, St0) -> - Exp = intersection(A#a.ns, As), %Exports - {Cto,[],_Us1,St1} = cexpr(Lto, As, St0), - {Ccs,St2} = cclauses(Lcs, Exp, St1), - {Ces,_Us2,St3} = cexprs(Les, Exp, St2), - {#c_receive{anno=A#a.anno, - clauses=Ccs,timeout=Cto,action=Ces}, - Exp,A#a.us,St3}; -cexpr(#itry{anno=A,args=La,vars=Vs,body=Lb,evars=Evs,handler=Lh}, As, St0) -> - Exp = intersection(A#a.ns, As), %Exports - {Ca,_Us1,St1} = cexprs(La, [], St0), - {Cb,_Us2,St2} = cexprs(Lb, Exp, St1), - {Ch,_Us3,St3} = cexprs(Lh, Exp, St2), - {#c_try{anno=A#a.anno,arg=Ca,vars=Vs,body=Cb,evars=Evs,handler=Ch}, - Exp,A#a.us,St3}; -cexpr(#icatch{anno=A,body=Les}, _As, St0) -> - {Ces,_Us1,St1} = cexprs(Les, [], St0), %Never export! - {#c_catch{body=Ces},[],A#a.us,St1}; -cexpr(#ifun{anno=A,id=Id,vars=Args,clauses=Lcs,fc=Lfc}, _As, St0) -> - {Ccs,St1} = cclauses(Lcs, [], St0), %NEVER export! - {Cfc,St2} = cclause(Lfc, [], St1), - Anno = A#a.anno, - {#c_fun{anno=Id++Anno,vars=Args, - body=#c_case{anno=Anno, - arg=core_lib:set_anno(core_lib:make_values(Args), Anno), - clauses=Ccs ++ [Cfc]}}, - [],A#a.us,St2}; -cexpr(#iapply{anno=A,op=Op,args=Args}, _As, St) -> - {#c_apply{anno=A#a.anno,op=Op,args=Args},[],A#a.us,St}; -cexpr(#icall{anno=A,module=Mod,name=Name,args=Args}, _As, St) -> - {#c_call{anno=A#a.anno,module=Mod,name=Name,args=Args},[],A#a.us,St}; -cexpr(#iprimop{anno=A,name=Name,args=Args}, _As, St) -> - {#c_primop{anno=A#a.anno,name=Name,args=Args},[],A#a.us,St}; -cexpr(#iprotect{anno=A,body=Es}, _As, St0) -> - {Ce,_,St1} = cexprs(Es, [], St0), - V = #c_var{name='Try'}, %The names are arbitrary - Vs = [#c_var{name='T'},#c_var{name='R'}], - {#c_try{anno=A#a.anno,arg=Ce,vars=[V],body=V, - evars=Vs,handler=#c_atom{val=false}}, - [],A#a.us,St1}; -cexpr(#ibinary{anno=#a{anno=Anno,us=Us},segments=Segs}, _As, St) -> - {#c_binary{anno=Anno,segments=Segs},[],Us,St}; -cexpr(Lit, _As, St) -> - true = core_lib:is_simple(Lit), %Sanity check! - Anno = core_lib:get_anno(Lit), - Vs = Anno#a.us, - %%Vs = lit_vars(Lit), - {core_lib:set_anno(Lit, Anno#a.anno),[],Vs,St}. - -%% lit_vars(Literal) -> [Var]. - -lit_vars(Lit) -> lit_vars(Lit, []). - -lit_vars(#c_cons{hd=H,tl=T}, Vs) -> lit_vars(H, lit_vars(T, Vs)); -lit_vars(#c_tuple{es=Es}, Vs) -> lit_list_vars(Es, Vs); -lit_vars(#c_var{name=V}, Vs) -> add_element(V, Vs); -lit_vars(_, Vs) -> Vs. %These are atomic - -% lit_bin_vars(Segs, Vs) -> -% foldl(fun (#c_bitstr{val=V,size=S}, Vs0) -> -% lit_vars(V, lit_vars(S, Vs0)) -% end, Vs, Segs). - -lit_list_vars(Ls) -> lit_list_vars(Ls, []). - -lit_list_vars(Ls, Vs) -> - foldl(fun (L, Vs0) -> lit_vars(L, Vs0) end, Vs, Ls). - -bitstr_vars(Segs) -> - bitstr_vars(Segs, []). - -bitstr_vars(Segs, Vs) -> - foldl(fun (#c_bitstr{val=V,size=S}, Vs0) -> - lit_vars(V, lit_vars(S, Vs0)) - end, Vs, Segs). - -get_ianno(Ce) -> - case core_lib:get_anno(Ce) of - #a{}=A -> A; - A when is_list(A) -> #a{anno=A} - end. - -get_lineno_anno(Ce) -> - case core_lib:get_anno(Ce) of - #a{anno=A} -> A; - A when is_list(A) -> A - end. - - -%%% -%%% Handling of warnings. -%%% - -format_error(nomatch) -> "pattern cannot possibly match". - -add_warning(Line, Term, #core{ws=Ws}=St) when Line >= 0 -> - St#core{ws=[{Line,?MODULE,Term}|Ws]}; -add_warning(_, _, St) -> St. - |