diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/compiler/src/Makefile | 4 | ||||
| -rw-r--r-- | lib/compiler/src/beam_block.erl | 19 | ||||
| -rw-r--r-- | lib/compiler/src/beam_bool.erl | 3 | ||||
| -rw-r--r-- | lib/compiler/src/beam_dead.erl | 24 | ||||
| -rw-r--r-- | lib/compiler/src/beam_peep.erl | 15 | ||||
| -rw-r--r-- | lib/compiler/src/cerl.erl | 3 | ||||
| -rw-r--r-- | lib/compiler/src/sys_core_fold.erl | 512 | ||||
| -rw-r--r-- | lib/compiler/src/v3_codegen.erl | 6 | ||||
| -rw-r--r-- | lib/compiler/src/v3_core.erl | 87 | ||||
| -rw-r--r-- | lib/compiler/src/v3_life.erl | 56 | ||||
| -rw-r--r-- | lib/compiler/test/andor_SUITE.erl | 12 | ||||
| -rw-r--r-- | lib/compiler/test/core_fold_SUITE.erl | 2 | ||||
| -rw-r--r-- | lib/compiler/test/match_SUITE.erl | 13 | ||||
| -rw-r--r-- | lib/compiler/test/warnings_SUITE.erl | 26 |
14 files changed, 534 insertions, 248 deletions
diff --git a/lib/compiler/src/Makefile b/lib/compiler/src/Makefile index 2032392821..7c4cebdc28 100644 --- a/lib/compiler/src/Makefile +++ b/lib/compiler/src/Makefile @@ -159,6 +159,10 @@ $(EBIN)/beam_asm.beam: $(ESRC)/beam_asm.erl $(EGEN)/beam_opcodes.hrl $(EBIN)/cerl_inline.beam: $(ESRC)/cerl_inline.erl $(V_ERLC) $(ERL_COMPILE_FLAGS) +nowarn_shadow_vars -o$(EBIN) $< +# Inlining core_parse is slow and has no benefit. +$(EBIN)/core_parse.beam: $(EGEN)/core_parse.erl + $(V_ERLC) $(subst +inline,,$(ERL_COMPILE_FLAGS)) -o$(EBIN) $< + # ---------------------------------------------------- # Release Target # ---------------------------------------------------- diff --git a/lib/compiler/src/beam_block.erl b/lib/compiler/src/beam_block.erl index 92f09e400c..5216f39296 100644 --- a/lib/compiler/src/beam_block.erl +++ b/lib/compiler/src/beam_block.erl @@ -252,13 +252,6 @@ combine_alloc({_,Ns,Nh1,Init}, {_,nostack,Nh2,[]}) -> %% opt([Instruction]) -> [Instruction] %% Optimize the instruction stream inside a basic block. -opt([{set,[Dst],As,{bif,Bif,Fail}}=I1, - {set,[Dst],[Dst],{bif,'not',Fail}}=I2|Is]) -> - %% Get rid of the 'not' if the operation can be inverted. - case inverse_comp_op(Bif) of - none -> [I1,I2|opt(Is)]; - RevBif -> [{set,[Dst],As,{bif,RevBif,Fail}}|opt(Is)] - end; opt([{set,[X],[X],move}|Is]) -> opt(Is); opt([{set,_,_,{line,_}}=Line1, {set,[D1],[{integer,Idx1},Reg],{bif,element,{f,0}}}=I1, @@ -428,18 +421,6 @@ x_live([{x,N}|Rs], Regs) -> x_live(Rs, Regs bor (1 bsl N)); x_live([_|Rs], Regs) -> x_live(Rs, Regs); x_live([], Regs) -> Regs. -%% inverse_comp_op(Op) -> none|RevOp - -inverse_comp_op('=:=') -> '=/='; -inverse_comp_op('=/=') -> '=:='; -inverse_comp_op('==') -> '/='; -inverse_comp_op('/=') -> '=='; -inverse_comp_op('>') -> '=<'; -inverse_comp_op('<') -> '>='; -inverse_comp_op('>=') -> '<'; -inverse_comp_op('=<') -> '>'; -inverse_comp_op(_) -> none. - %%% %%% Evaluation of constant bit fields. %%% diff --git a/lib/compiler/src/beam_bool.erl b/lib/compiler/src/beam_bool.erl index a452d30b61..5ed9c16d61 100644 --- a/lib/compiler/src/beam_bool.erl +++ b/lib/compiler/src/beam_bool.erl @@ -787,6 +787,9 @@ is_not_used(R, Is, Label, #st{ll=Ll}) -> initialized_regs(Is) -> initialized_regs(Is, ordsets:new()). +initialized_regs([{set,Dst,_Src,{alloc,Live,_}}|_], Regs0) -> + Regs = add_init_regs(free_vars_regs(Live), Regs0), + add_init_regs(Dst, Regs); initialized_regs([{set,Dst,Src,_}|Is], Regs) -> initialized_regs(Is, add_init_regs(Dst, add_init_regs(Src, Regs))); initialized_regs([{test,_,_,Src}|Is], Regs) -> diff --git a/lib/compiler/src/beam_dead.erl b/lib/compiler/src/beam_dead.erl index 7cd07dc3be..f4515ba2a7 100644 --- a/lib/compiler/src/beam_dead.erl +++ b/lib/compiler/src/beam_dead.erl @@ -98,6 +98,12 @@ move_move_into_block([], Acc) -> reverse(Acc). forward(Is, Lc) -> forward(Is, gb_trees:empty(), Lc, []). +forward([{move,_,_}=Move|[{label,L}|_]=Is], D, Lc, Acc) -> + %% move/2 followed by jump/1 is optimized by backward/3. + forward([Move,{jump,{f,L}}|Is], D, Lc, Acc); +forward([{bif,_,_,_,_}=Bif|[{label,L}|_]=Is], D, Lc, Acc) -> + %% bif/4 followed by jump/1 is optimized by backward/3. + forward([Bif,{jump,{f,L}}|Is], D, Lc, Acc); forward([{block,[]}|Is], D, Lc, Acc) -> %% Empty blocks can prevent optimizations. forward(Is, D, Lc, Acc); @@ -124,6 +130,8 @@ forward([{label,Lbl}=LblI|[{move,Lit,Dst}|Is1]=Is0], D, Lc, Acc) -> _ -> Is0 %Keep move instruction. end, forward(Is, D, Lc, [LblI|Acc]); +forward([{test,is_eq_exact,_,[Same,Same]}|Is], D, Lc, Acc) -> + forward(Is, D, Lc, Acc); forward([{test,is_eq_exact,_,[Dst,Src]}=I, {block,[{set,[Dst],[Src],move}|Bl]}|Is], D, Lc, Acc) -> forward([I,{block,Bl}|Is], D, Lc, Acc); @@ -234,10 +242,8 @@ backward([{select,select_val,Reg,{f,Fail0},List0}|Is], D, Acc) -> Fail = shortcut_bs_test(Fail1, Is, D), Sel = {select,select_val,Reg,{f,Fail},List}, backward(Is, D, [Sel|Acc]); -backward([{jump,{f,To0}},{move,Src0,Reg}|Is], D, Acc) -> - To1 = shortcut_select_label(To0, Reg, Src0, D), - {To,Src} = shortcut_boolean_label(To1, Reg, Src0, D), - Move = {move,Src,Reg}, +backward([{jump,{f,To0}},{move,Src,Reg}=Move|Is], D, Acc) -> + To = shortcut_select_label(To0, Reg, Src, D), Jump = {jump,{f,To}}, case beam_utils:is_killed_at(Reg, To, D) of false -> backward([Move|Is], D, [Jump|Acc]); @@ -330,16 +336,6 @@ shortcut_label(To0, D) -> shortcut_select_label(To, Reg, Lit, D) -> shortcut_rel_op(To, is_ne_exact, [Reg,Lit], D). -shortcut_boolean_label(To0, Reg, {atom,Bool0}=Lit, D) when is_boolean(Bool0) -> - case beam_utils:code_at(To0, D) of - [{line,_},{bif,'not',_,[Reg],Reg},{jump,{f,To}}|_] -> - Bool = {atom,not Bool0}, - {shortcut_select_label(To, Reg, Bool, D),Bool}; - _ -> - {To0,Lit} - end; -shortcut_boolean_label(To, _, Bool, _) -> {To,Bool}. - %% Replace a comparison operator with a test instruction and a jump. %% For example, if we have this code: %% diff --git a/lib/compiler/src/beam_peep.erl b/lib/compiler/src/beam_peep.erl index 97a8c7ba70..5abacc8d5d 100644 --- a/lib/compiler/src/beam_peep.erl +++ b/lib/compiler/src/beam_peep.erl @@ -108,14 +108,14 @@ peep([{test,Op,_,Ops}=I|Is], SeenTests0, Acc) -> %% has succeeded. peep(Is, gb_sets:empty(), [I|Acc]); true -> - Test = {Op,Ops}, - case gb_sets:is_element(Test, SeenTests0) of + case is_test_redundant(Op, Ops, SeenTests0) of true -> - %% This test has already succeeded and + %% This test or a similar test has already succeeded and %% is therefore redundant. peep(Is, SeenTests0, Acc); false -> %% Remember that we have seen this test. + Test = {Op,Ops}, SeenTests = gb_sets:insert(Test, SeenTests0), peep(Is, SeenTests, [I|Acc]) end @@ -136,6 +136,15 @@ peep([I|Is], _, Acc) -> peep(Is, gb_sets:empty(), [I|Acc]); peep([], _, Acc) -> reverse(Acc). +is_test_redundant(Op, Ops, Seen) -> + gb_sets:is_element({Op,Ops}, Seen) orelse + is_test_redundant_1(Op, Ops, Seen). + +is_test_redundant_1(is_boolean, [R], Seen) -> + gb_sets:is_element({is_eq_exact,[R,{atom,false}]}, Seen) orelse + gb_sets:is_element({is_eq_exact,[R,{atom,true}]}, Seen); +is_test_redundant_1(_, _, _) -> false. + kill_seen(Dst, Seen0) -> gb_sets:from_ordset(kill_seen_1(gb_sets:to_list(Seen0), Dst)). diff --git a/lib/compiler/src/cerl.erl b/lib/compiler/src/cerl.erl index 3d4b9ee0c6..8367a1e19e 100644 --- a/lib/compiler/src/cerl.erl +++ b/lib/compiler/src/cerl.erl @@ -138,7 +138,8 @@ ]). -export_type([c_binary/0, c_bitstr/0, c_call/0, c_clause/0, c_cons/0, c_fun/0, - c_literal/0, c_map/0, c_map_pair/0, c_module/0, c_tuple/0, + c_let/0, c_literal/0, c_map/0, c_map_pair/0, + c_module/0, c_tuple/0, c_values/0, c_var/0, cerl/0, var_name/0]). -include("core_parse.hrl"). diff --git a/lib/compiler/src/sys_core_fold.erl b/lib/compiler/src/sys_core_fold.erl index ea1959d0f8..0d020578f5 100644 --- a/lib/compiler/src/sys_core_fold.erl +++ b/lib/compiler/src/sys_core_fold.erl @@ -96,7 +96,7 @@ t=[], %Types in_guard=false}). %In guard or not. --type type_info() :: cerl:cerl() | 'bool'. +-type type_info() :: cerl:cerl() | 'bool' | 'integer'. -type yes_no_maybe() :: 'yes' | 'no' | 'maybe'. -type sub() :: #sub{}. @@ -297,7 +297,8 @@ expr(#c_seq{arg=Arg0,body=B0}=Seq0, Ctxt, Sub) -> false -> Seq0#c_seq{arg=Arg,body=B1} end end; -expr(#c_let{}=Let, Ctxt, Sub) -> +expr(#c_let{}=Let0, Ctxt, Sub) -> + Let = opt_case_in_let(Let0), case simplify_let(Let, Sub) of impossible -> %% The argument for the let is "simple", i.e. has no @@ -829,16 +830,16 @@ eval_rel_op(Call, '=:=', [Term,#c_literal{val=true}], Sub) -> maybe -> Call; no -> #c_literal{val=false} end; -eval_rel_op(Call, '==', Ops, _Sub) -> - case is_exact_eq_ok(Ops) of +eval_rel_op(Call, '==', Ops, Sub) -> + case is_exact_eq_ok(Ops, Sub) of true -> Name = #c_literal{anno=cerl:get_ann(Call),val='=:='}, Call#c_call{name=Name}; false -> Call end; -eval_rel_op(Call, '/=', Ops, _Sub) -> - case is_exact_eq_ok(Ops) of +eval_rel_op(Call, '/=', Ops, Sub) -> + case is_exact_eq_ok(Ops, Sub) of true -> Name = #c_literal{anno=cerl:get_ann(Call),val='=/='}, Call#c_call{name=Name}; @@ -847,11 +848,17 @@ eval_rel_op(Call, '/=', Ops, _Sub) -> end; eval_rel_op(Call, _, _, _) -> Call. -is_exact_eq_ok([#c_literal{val=Lit}|_]) -> +is_exact_eq_ok([A,B]=L, Sub) -> + case is_int_type(A, Sub) =:= yes andalso is_int_type(B, Sub) =:= yes of + true -> true; + false -> is_exact_eq_ok_1(L) + end. + +is_exact_eq_ok_1([#c_literal{val=Lit}|_]) -> is_non_numeric(Lit); -is_exact_eq_ok([_|T]) -> - is_exact_eq_ok(T); -is_exact_eq_ok([]) -> false. +is_exact_eq_ok_1([_|T]) -> + is_exact_eq_ok_1(T); +is_exact_eq_ok_1([]) -> false. is_non_numeric([H|T]) -> is_non_numeric(H) andalso is_non_numeric(T); @@ -963,7 +970,7 @@ eval_element(Call, #c_literal{val=Pos}, Tuple, Types) 1 =< Pos, Pos =< length(Es) -> El = lists:nth(Pos, Es), try - pat_to_expr(El) + cerl:set_ann(pat_to_expr(El), [compiler_generated]) catch throw:impossible -> Call @@ -1008,28 +1015,32 @@ eval_is_record(Call, _, _, _, _) -> Call. %% eval_setelement(Call, Pos, Tuple, NewVal) -> Core. %% Evaluates setelement/3 if position Pos is an integer -%% the shape of the tuple Tuple is known. +%% and the shape of the tuple Tuple is known. %% -eval_setelement(Call, Pos, Tuple, NewVal) -> - try - eval_setelement_1(Pos, Tuple, NewVal) - catch - error:_ -> - Call - end. - -eval_setelement_1(#c_literal{val=Pos}, #c_tuple{anno=A,es=Es}, NewVal) - when is_integer(Pos) -> - ann_c_tuple(A, eval_setelement_2(Pos, Es, NewVal)); -eval_setelement_1(#c_literal{val=Pos}, #c_literal{anno=A,val=Es0}, NewVal) +eval_setelement(Call, #c_literal{val=Pos}, Tuple, NewVal) when is_integer(Pos) -> - Es = [#c_literal{anno=A,val=E} || E <- tuple_to_list(Es0)], - ann_c_tuple(A, eval_setelement_2(Pos, Es, NewVal)). + case cerl:is_data(Tuple) of + false -> + Call; + true -> + Es0 = case cerl:is_c_tuple(Tuple) of + false -> []; + true -> cerl:tuple_es(Tuple) + end, + if + 1 =< Pos, Pos =< length(Es0) -> + Es = eval_setelement_1(Pos, Es0, NewVal), + cerl:update_c_tuple(Tuple, Es); + true -> + eval_failure(Call, badarg) + end + end; +eval_setelement(Call, _, _, _) -> Call. -eval_setelement_2(1, [_|T], NewVal) -> +eval_setelement_1(1, [_|T], NewVal) -> [NewVal|T]; -eval_setelement_2(Pos, [H|T], NewVal) when Pos > 1 -> - [H|eval_setelement_2(Pos-1, T, NewVal)]. +eval_setelement_1(Pos, [H|T], NewVal) when Pos > 1 -> + [H|eval_setelement_1(Pos-1, T, NewVal)]. %% eval_failure(Call, Reason) -> Core. %% Warn for a call that will fail and replace the call with @@ -1955,46 +1966,125 @@ letify(Bs, Body) -> cerl:ann_c_let(Ann, [V], Val, B) end, Body, Bs). -%% opt_case_in_let(LetExpr) -> LetExpr' +%% opt_not_in_let(Let) -> Cerl +%% Try to optimize away a 'not' operator in a 'let'. -opt_case_in_let(#c_let{vars=Vs,arg=Arg,body=B}=Let, Sub) -> - opt_case_in_let_0(Vs, Arg, B, Let, Sub). +-spec opt_not_in_let(cerl:c_let()) -> cerl:cerl(). -opt_case_in_let_0([#c_var{name=V}], Arg, - #c_case{arg=#c_var{name=V},clauses=Cs}=Case, Let, Sub) -> - case opt_case_in_let_1(V, Arg, Cs) of - impossible -> - case is_simple_case_arg(Arg) andalso - not core_lib:is_var_used(V, Case#c_case{arg=#c_literal{val=nil}}) of - true -> - expr(opt_bool_case(Case#c_case{arg=Arg,clauses=Cs}), sub_new(Sub)); - false -> - Let +opt_not_in_let(#c_let{vars=[_]=Vs0,arg=Arg0,body=Body0}=Let) -> + case opt_not_in_let(Vs0, Arg0, Body0) of + {[],#c_values{es=[]},Body} -> + Body; + {Vs,Arg,Body} -> + Let#c_let{vars=Vs,arg=Arg,body=Body} + end; +opt_not_in_let(Let) -> Let. + +%% opt_not_in_let(Vs, Arg, Body) -> {Vs',Arg',Body'} +%% Try to optimize away a 'not' operator in a 'let'. + +-spec opt_not_in_let([cerl:c_var()], cerl:cerl(), cerl:cerl()) -> + {[cerl:c_var()],cerl:cerl(),cerl:cerl()}. + +opt_not_in_let([#c_var{name=V}]=Vs0, Arg0, Body0) -> + case cerl:type(Body0) of + call -> + %% let <V> = Expr in not V ==> + %% let <> = <> in notExpr + case opt_not_in_let_1(V, Body0, Arg0) of + no -> + {Vs0,Arg0,Body0}; + {yes,Body} -> + {[],#c_values{es=[]},Body} end; - Expr -> Expr + 'let' -> + %% let <V> = Expr in let <Var> = not V in Body ==> + %% let <Var> = notExpr in Body + %% V must not be used in Body. + LetArg = cerl:let_arg(Body0), + case opt_not_in_let_1(V, LetArg, Arg0) of + no -> + {Vs0,Arg0,Body0}; + {yes,Arg} -> + LetBody = cerl:let_body(Body0), + case core_lib:is_var_used(V, LetBody) of + true -> + {Vs0,Arg0,Body0}; + false -> + LetVars = cerl:let_vars(Body0), + {LetVars,Arg,LetBody} + end + end; + _ -> + {Vs0,Arg0,Body0} end; -opt_case_in_let_0(_, _, _, Let, _) -> Let. - -opt_case_in_let_1(V, Arg, Cs) -> - try - opt_case_in_let_2(V, Arg, Cs) - catch - _:_ -> impossible +opt_not_in_let(Vs, Arg, Body) -> + {Vs,Arg,Body}. + +opt_not_in_let_1(V, Call, Body) -> + case Call of + #c_call{module=#c_literal{val=erlang}, + name=#c_literal{val='not'}, + args=[#c_var{name=V}]} -> + opt_not_in_let_2(Body); + _ -> + no end. -opt_case_in_let_2(V, Arg0, - [#c_clause{pats=[#c_tuple{es=Es}], - guard=#c_literal{val=true},body=B}|_]) -> +opt_not_in_let_2(#c_case{clauses=Cs0}=Case) -> + Vars = make_vars([], 1), + Body = #c_call{module=#c_literal{val=erlang}, + name=#c_literal{val='not'}, + args=Vars}, + Cs = [begin + Let = #c_let{vars=Vars,arg=B,body=Body}, + C#c_clause{body=opt_not_in_let(Let)} + end || #c_clause{body=B}=C <- Cs0], + {yes,Case#c_case{clauses=Cs}}; +opt_not_in_let_2(#c_call{}=Call0) -> + invert_call(Call0); +opt_not_in_let_2(_) -> no. + +invert_call(#c_call{module=#c_literal{val=erlang}, + name=#c_literal{val=Name0}, + args=[_,_]}=Call) -> + case inverse_rel_op(Name0) of + no -> no; + Name -> {yes,Call#c_call{name=#c_literal{val=Name}}} + end; +invert_call(#c_call{}) -> no. + +%% inverse_rel_op(Op) -> no | RevOp + +inverse_rel_op('=:=') -> '=/='; +inverse_rel_op('=/=') -> '=:='; +inverse_rel_op('==') -> '/='; +inverse_rel_op('/=') -> '=='; +inverse_rel_op('>') -> '=<'; +inverse_rel_op('<') -> '>='; +inverse_rel_op('>=') -> '<'; +inverse_rel_op('=<') -> '>'; +inverse_rel_op(_) -> no. - %% In {V1,V2,...} = case E of P -> ... {Val1,Val2,...}; ... end. - %% avoid building tuples, by converting tuples to multiple values. - %% (The optimisation is not done if the built tuple is used or returned.) - true = all(fun (#c_var{}) -> true; - (_) -> false end, Es), %Only variables in tuple - false = core_lib:is_var_used(V, B), %Built tuple must not be used. - Arg1 = tuple_to_values(Arg0, length(Es)), %Might fail. - #c_let{vars=Es,arg=Arg1,body=B}. +%% opt_bool_case_in_let(LetExpr, Sub) -> Core + +opt_bool_case_in_let(#c_let{vars=Vs,arg=Arg,body=B}=Let, Sub) -> + opt_case_in_let_1(Vs, Arg, B, Let, Sub). + +opt_case_in_let_1([#c_var{name=V}], Arg, + #c_case{arg=#c_var{name=V}}=Case0, Let, Sub) -> + case is_simple_case_arg(Arg) of + true -> + Case = opt_bool_case(Case0#c_case{arg=Arg}), + case core_lib:is_var_used(V, Case) of + false -> expr(Case, sub_new(Sub)); + true -> Let + end; + false -> + Let + end; +opt_case_in_let_1(_, _, _, Let, _) -> Let. %% is_simple_case_arg(Expr) -> true|false %% Determine whether the Expr is simple enough to be worth @@ -2036,7 +2126,7 @@ is_bool_expr(#c_clause{body=B}, Sub) -> is_bool_expr(B, Sub); is_bool_expr(#c_let{vars=[V],arg=Arg,body=B}, Sub0) -> Sub = case is_bool_expr(Arg, Sub0) of - true -> update_types(V, [#c_literal{val=true}], Sub0); + true -> update_types(V, [bool], Sub0); false -> Sub0 end, is_bool_expr(B, Sub); @@ -2122,38 +2212,6 @@ is_safe_bool_expr_list([C|Cs], Sub, BoolVars) -> end; is_safe_bool_expr_list([], _, _) -> true. -%% tuple_to_values(Expr, TupleArity) -> Expr' -%% Convert tuples in return position of arity TupleArity to values. -%% Throws an exception for constructs that are not handled. - -tuple_to_values(#c_tuple{es=Es}, Arity) when length(Es) =:= Arity -> - core_lib:make_values(Es); -tuple_to_values(#c_literal{val=Tuple}=Lit, Arity) when tuple_size(Tuple) =:= Arity -> - Es = [Lit#c_literal{val=E} || E <- tuple_to_list(Tuple)], - core_lib:make_values(Es); -tuple_to_values(#c_case{clauses=Cs0}=Case, Arity) -> - Cs1 = [tuple_to_values(E, Arity) || E <- Cs0], - Case#c_case{clauses=Cs1}; -tuple_to_values(#c_seq{body=B0}=Seq, Arity) -> - Seq#c_seq{body=tuple_to_values(B0, Arity)}; -tuple_to_values(#c_let{body=B0}=Let, Arity) -> - Let#c_let{body=tuple_to_values(B0, Arity)}; -tuple_to_values(#c_receive{clauses=Cs0,timeout=Timeout,action=A0}=Rec, Arity) -> - Cs = [tuple_to_values(E, Arity) || E <- Cs0], - A = case Timeout of - #c_literal{val=infinity} -> A0; - _ -> tuple_to_values(A0, Arity) - end, - Rec#c_receive{clauses=Cs,action=A}; -tuple_to_values(#c_clause{body=B0}=Clause, Arity) -> - B = tuple_to_values(B0, Arity), - Clause#c_clause{body=B}; -tuple_to_values(Expr, _) -> - case will_fail(Expr) of - true -> Expr; - false -> erlang:error({not_handled,Expr}) - end. - %% simplify_let(Let, Sub) -> Expr | impossible %% If the argument part of an let contains a complex expression, such %% as a let or a sequence, move the original let body into the complex @@ -2180,7 +2238,7 @@ move_let_into_expr(#c_let{vars=InnerVs0,body=InnerBody0}=Inner, Arg = body(Arg0, Sub0), ScopeSub0 = sub_subst_scope(Sub0#sub{t=[]}), {OuterVs,ScopeSub} = pattern_list(OuterVs0, ScopeSub0), - + OuterBody = body(OuterBody0, ScopeSub), {InnerVs,Sub} = pattern_list(InnerVs0, Sub0), @@ -2258,50 +2316,179 @@ move_let_into_expr(_Let, _Expr, _Sub) -> impossible. is_failing_clause(#c_clause{body=B}) -> will_fail(B). +%% opt_case_in_let(Let) -> Let' +%% Try to avoid building tuples that are immediately matched. +%% A common pattern is: +%% +%% {V1,V2,...} = case E of P -> ... {Val1,Val2,...}; ... end +%% +%% In Core Erlang the pattern would look like this: +%% +%% let <V> = case E of +%% ... -> ... {Val1,Val2} +%% ... +%% end, +%% in case V of +%% {A,B} -> ... <use A and B> ... +%% end +%% +%% Rewrite this to: +%% +%% let <V1,V2> = case E of +%% ... -> ... <Val1,Val2> +%% ... +%% end, +%% in +%% let <V> = {V1,V2} +%% in case V of +%% {A,B} -> ... <use A and B> ... +%% end +%% +%% Note that the second 'case' is unchanged. The other optimizations +%% in this module will eliminate the building of the tuple and +%% rewrite the second case to: +%% +%% case <V1,V2> of +%% <A,B> -> ... <use A and B> ... +%% end +%% + +opt_case_in_let(#c_let{vars=Vs,arg=Arg0,body=B}=Let0) -> + case matches_data(Vs, B) of + {yes,TypeSig} -> + case delay_build(Arg0, TypeSig) of + no -> + Let0; + {yes,Vars,Arg,Data} -> + InnerLet = Let0#c_let{arg=Data}, + Let0#c_let{vars=Vars,arg=Arg,body=InnerLet} + end; + no -> + Let0 + end. + +matches_data([#c_var{name=V}], #c_case{arg=#c_var{name=V}, + clauses=[#c_clause{pats=[P]}|_]}) -> + case cerl:is_data(P) of + false -> + no; + true -> + case cerl:data_type(P) of + {atomic,_} -> + no; + Type -> + {yes,{Type,cerl:data_arity(P)}} + end + end; +matches_data(_, _) -> no. + +delay_build(Core, TypeSig) -> + case cerl:is_data(Core) of + true -> no; + false -> delay_build_1(Core, TypeSig) + end. + +delay_build_1(Core0, TypeSig) -> + try delay_build_expr(Core0, TypeSig) of + Core -> + {Type,Arity} = TypeSig, + Vars = make_vars([], Arity), + Data = cerl:ann_make_data([compiler_generated], Type, Vars), + {yes,Vars,Core,Data} + catch + throw:impossible -> + no + end. + +delay_build_cs([#c_clause{body=B0}=C0|Cs], TypeSig) -> + B = delay_build_expr(B0, TypeSig), + C = C0#c_clause{body=B}, + [C|delay_build_cs(Cs, TypeSig)]; +delay_build_cs([], _) -> []. + +delay_build_expr(Core, {Type,Arity}=TypeSig) -> + case cerl:is_data(Core) of + false -> + delay_build_expr_1(Core, TypeSig); + true -> + case {cerl:data_type(Core),cerl:data_arity(Core)} of + {Type,Arity} -> + core_lib:make_values(cerl:data_es(Core)); + {_,_} -> + throw(impossible) + end + end. + +delay_build_expr_1(#c_case{clauses=Cs0}=Case, TypeSig) -> + Cs = delay_build_cs(Cs0, TypeSig), + Case#c_case{clauses=Cs}; +delay_build_expr_1(#c_let{body=B0}=Let, TypeSig) -> + B = delay_build_expr(B0, TypeSig), + Let#c_let{body=B}; +delay_build_expr_1(#c_receive{clauses=Cs0, + timeout=Timeout, + action=A0}=Rec, TypeSig) -> + Cs = delay_build_cs(Cs0, TypeSig), + A = case Timeout of + #c_literal{val=infinity} -> A0; + _ -> delay_build_expr(A0, TypeSig) + end, + Rec#c_receive{clauses=Cs,action=A}; +delay_build_expr_1(#c_seq{body=B0}=Seq, TypeSig) -> + B = delay_build_expr(B0, TypeSig), + Seq#c_seq{body=B}; +delay_build_expr_1(Core, _TypeSig) -> + case will_fail(Core) of + true -> Core; + false -> throw(impossible) + end. + %% opt_simple_let(#c_let{}, Context, Sub) -> CoreTerm %% Optimize a let construct that does not contain any lets in %% in its argument. -opt_simple_let(#c_let{arg=Arg0}=Let, Ctxt, Sub0) -> - Arg = body(Arg0, value, Sub0), %This is a body +opt_simple_let(Let0, Ctxt, Sub) -> + case opt_not_in_let(Let0) of + #c_let{}=Let -> + opt_simple_let_0(Let, Ctxt, Sub); + Expr -> + expr(Expr, Ctxt, Sub) + end. + +opt_simple_let_0(#c_let{arg=Arg0}=Let, Ctxt, Sub) -> + Arg = body(Arg0, value, Sub), %This is a body case will_fail(Arg) of true -> Arg; - false -> opt_simple_let_1(Let, Arg, Ctxt, Sub0) + false -> opt_simple_let_1(Let, Arg, Ctxt, Sub) end. opt_simple_let_1(#c_let{vars=Vs0,body=B0}=Let, Arg0, Ctxt, Sub0) -> %% Optimise let and add new substitutions. - {Vs,Args,Sub1} = let_substs(Vs0, Arg0, Sub0), - BodySub = case {Vs,Args} of - {[V],[A]} -> - case is_bool_expr(A, Sub0) of - true -> - update_types(V, [#c_literal{val=true}], Sub1); - false -> - Sub1 - end; - {_,_} -> Sub1 - end, - B = body(B0, Ctxt, BodySub), - Arg = core_lib:make_values(Args), - opt_simple_let_2(Let, Vs, Arg, B, Ctxt, Sub1). - -opt_simple_let_2(Let0, Vs0, Arg0, Body, Ctxt, Sub) -> + {Vs1,Args,Sub1} = let_substs(Vs0, Arg0, Sub0), + BodySub = update_let_types(Vs1, Args, Sub1), + B1 = body(B0, Ctxt, BodySub), + Arg1 = core_lib:make_values(Args), + {Vs,Arg,B} = opt_not_in_let(Vs1, Arg1, B1), + opt_simple_let_2(Let, Vs, Arg, B, B0, Ctxt, Sub1). + +opt_simple_let_2(Let0, Vs0, Arg0, Body, PrevBody, Ctxt, Sub) -> case {Vs0,Arg0,Body} of - {[#c_var{name=N1}],Arg,#c_var{name=N2}} -> + {[#c_var{name=N1}],Arg1,#c_var{name=N2}} -> case N1 =:= N2 of true -> %% let <Var> = Arg in <Var> ==> Arg - Arg; + Arg1; false -> %% let <Var> = Arg in <OtherVar> ==> seq Arg OtherVar + Arg = maybe_suppress_warnings(Arg1, Vs0, PrevBody, Ctxt), expr(#c_seq{arg=Arg,body=Body}, Ctxt, sub_new_preserve_types(Sub)) end; {[],#c_values{es=[]},_} -> %% No variables left. Body; - {_,Arg,#c_literal{}} -> + {Vs,Arg1,#c_literal{}} -> + Arg = maybe_suppress_warnings(Arg1, Vs, PrevBody, Ctxt), E = case Ctxt of effect -> %% Throw away the literal body. @@ -2313,22 +2500,50 @@ opt_simple_let_2(Let0, Vs0, Arg0, Body, Ctxt, Sub) -> #c_seq{arg=Arg,body=Body} end, expr(E, Ctxt, sub_new_preserve_types(Sub)); - {Vs,Arg,Body} -> + {Vs,Arg1,Body} -> %% If none of the variables are used in the body, we can %% rewrite the let to a sequence: %% let <Var> = Arg in BodyWithoutVar ==> %% seq Arg BodyWithoutVar case is_any_var_used(Vs, Body) of false -> + Arg = maybe_suppress_warnings(Arg1, Vs, PrevBody, Ctxt), expr(#c_seq{arg=Arg,body=Body}, Ctxt, sub_new_preserve_types(Sub)); true -> - Let1 = Let0#c_let{vars=Vs,arg=Arg,body=Body}, - Let2 = opt_case_in_let(Let1, Sub), + Let1 = Let0#c_let{vars=Vs,arg=Arg1,body=Body}, + Let2 = opt_bool_case_in_let(Let1, Sub), opt_case_in_let_arg(Let2, Ctxt, Sub) end end. +%% maybe_suppress_warnings(Arg, [#c_var{}], PreviousBody, Context) -> Arg' +%% Try to suppress false warnings when a variable is not used. +%% For instance, we don't expect a warning for useless building in: +%% +%% R = #r{}, %No warning expected. +%% R#r.f %Optimization would remove the reference to R. +%% +%% To avoid false warnings, we will check whether the variables were +%% referenced in the original unoptimized code. If they were, we will +%% consider the warning false and suppress it. + +maybe_suppress_warnings(Arg, _, _, effect) -> + %% Don't suppress any warnings in effect context. + Arg; +maybe_suppress_warnings(Arg, Vs, PrevBody, value) -> + case suppress_warning(Arg) of + true -> + Arg; %Already suppressed. + false -> + case is_any_var_used(Vs, PrevBody) of + true -> + cerl:set_ann(Arg, [compiler_generated]); + false -> + Arg + end + end. + move_case_into_arg(#c_case{arg=#c_let{vars=OuterVars0,arg=OuterArg, body=InnerArg0}=Outer, clauses=InnerClauses}=Inner, Sub) -> @@ -2416,7 +2631,7 @@ move_case_into_arg(_, _) -> %% <> when 'true' -> %% let <Var> = Literal2 in LetBody %% end -%% +%% %% In the worst case, the size of the code could increase. %% In practice, though, substituting the literals into %% LetBody and doing constant folding will decrease the code @@ -2490,6 +2705,7 @@ is_boolean_type(Var, Sub) -> is_int_type(Var, Sub) -> case get_type(Var, Sub) of none -> maybe; + integer -> yes; C -> yes_no(cerl:is_c_int(C)) end. @@ -2504,8 +2720,58 @@ is_tuple_type(Var, Sub) -> yes_no(true) -> yes; yes_no(false) -> no. +%%% +%%% Update type information. +%%% + +update_let_types(Vs, Args, Sub) when is_list(Args) -> + update_let_types_1(Vs, Args, Sub); +update_let_types(_Vs, _Arg, Sub) -> + %% The argument is a complex expression (such as a 'case') + %% that returns multiple values. + Sub. + +update_let_types_1([#c_var{}=V|Vs], [A|As], Sub0) -> + Sub = update_types_from_expr(V, A, Sub0), + update_let_types_1(Vs, As, Sub); +update_let_types_1([], [], Sub) -> Sub. + +update_types_from_expr(V, Expr, Sub) -> + Type = extract_type(Expr, Sub), + update_types(V, [Type], Sub). + +extract_type(#c_call{module=#c_literal{val=erlang}, + name=#c_literal{val=Name}, + args=Args}=Call, Sub) -> + case returns_integer(Name, Args) of + true -> integer; + false -> extract_type_1(Call, Sub) + end; +extract_type(Expr, Sub) -> + extract_type_1(Expr, Sub). + +extract_type_1(Expr, Sub) -> + case is_bool_expr(Expr, Sub) of + false -> Expr; + true -> bool + end. + +returns_integer(bit_size, [_]) -> true; +returns_integer('bsl', [_,_]) -> true; +returns_integer('bsr', [_,_]) -> true; +returns_integer(byte_size, [_]) -> true; +returns_integer(length, [_]) -> true; +returns_integer('rem', [_,_]) -> true; +returns_integer(size, [_]) -> true; +returns_integer(tuple_size, [_]) -> true; +returns_integer(trunc, [_]) -> true; +returns_integer(_, _) -> false. + %% update_types(Expr, Pattern, Sub) -> Sub' %% Update the type database. + +-spec update_types(cerl:cerl(), [type_info()], sub()) -> sub(). + update_types(Expr, Pat, #sub{t=Tdb0}=Sub) -> Tdb = update_types_1(Expr, Pat, Tdb0), Sub#sub{t=Tdb}. @@ -2525,6 +2791,8 @@ update_types_2(V, [#c_tuple{}=P], Types) -> orddict:store(V, P, Types); update_types_2(V, [#c_literal{val=Bool}], Types) when is_boolean(Bool) -> orddict:store(V, bool, Types); +update_types_2(V, [Type], Types) when is_atom(Type) -> + orddict:store(V, Type, Types); update_types_2(_, _, Types) -> Types. %% kill_types(V, Tdb) -> Tdb' @@ -2791,7 +3059,7 @@ bsm_ensure_no_partition_after([#c_clause{pats=Ps}|Cs], Pos) -> bsm_problem(P, bin_partition) end; bsm_ensure_no_partition_after([], _) -> ok. - + bsm_could_match_binary(#c_alias{pat=P}) -> bsm_could_match_binary(P); bsm_could_match_binary(#c_cons{}) -> false; bsm_could_match_binary(#c_tuple{}) -> false; diff --git a/lib/compiler/src/v3_codegen.erl b/lib/compiler/src/v3_codegen.erl index cbe50b93b0..7eec9dd62b 100644 --- a/lib/compiler/src/v3_codegen.erl +++ b/lib/compiler/src/v3_codegen.erl @@ -69,10 +69,8 @@ stk=[], %Stack table res=[]}). %Reserved regs: [{reserved,I,V}] -module({Mod,Exp,Attr,Forms}, Options) -> - put(?MODULE, Options), +module({Mod,Exp,Attr,Forms}, _Options) -> {Fs,St} = functions(Forms, {atom,Mod}), - erase(?MODULE), {ok,{Mod,Exp,Attr,Fs,St#cg.lcount}}. functions(Forms, AtomMod) -> @@ -924,7 +922,7 @@ select_extract_tuple(Src, Vs, I, Vdb, Bef, St) -> select_map(Scs, V, Tf, Vf, Bef, St0) -> Reg = fetch_var(V, Bef), {Is,Aft,St1} = - match_fmf(fun(#l{ke={val_clause,{map,_,Es},B},i=I,vdb=Vdb}, Fail, St1) -> + match_fmf(fun(#l{ke={val_clause,{map,exact,_,Es},B},i=I,vdb=Vdb}, Fail, St1) -> select_map_val(V, Es, B, Fail, I, Vdb, Bef, St1) end, Vf, St0, Scs), {[{test,is_map,{f,Tf},[Reg]}|Is],Aft,St1}. diff --git a/lib/compiler/src/v3_core.erl b/lib/compiler/src/v3_core.erl index 3c19a209c0..c954d21e59 100644 --- a/lib/compiler/src/v3_core.erl +++ b/lib/compiler/src/v3_core.erl @@ -78,7 +78,7 @@ splitwith/2,keyfind/3,sort/1,foreach/2,droplast/1,last/1]). -import(ordsets, [add_element/2,del_element/2,is_element/2, union/1,union/2,intersection/2,subtract/2]). --import(cerl, [ann_c_cons/3,ann_c_cons_skel/3,ann_c_tuple/2,c_tuple/1, +-import(cerl, [ann_c_cons/3,ann_c_tuple/2,c_tuple/1, ann_c_map/3]). -include("core_parse.hrl"). @@ -1660,48 +1660,55 @@ pat_segment({bin_element,_,Val,Size,[Type,{unit,Unit}|Flags]}, St) -> %% 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}; - -%% alias cons -pat_alias(#c_cons{}=Cons, #c_literal{anno=A,val=[H|T]}=S) -> - pat_alias(Cons, ann_c_cons_skel(A, #c_literal{anno=A,val=H}, - S#c_literal{val=T})); -pat_alias(#c_literal{anno=A,val=[H|T]}=S, #c_cons{}=Cons) -> - pat_alias(ann_c_cons_skel(A, #c_literal{anno=A,val=H}, - S#c_literal{val=T}), Cons); -pat_alias(#c_cons{anno=Anno,hd=H1,tl=T1}, #c_cons{hd=H2,tl=T2}) -> - ann_c_cons(Anno, pat_alias(H1, H2), pat_alias(T1, T2)); - -%% alias tuples -pat_alias(#c_tuple{anno=Anno,es=Es1}, #c_literal{val=T}) when is_tuple(T) -> - Es2 = [#c_literal{val=E} || E <- tuple_to_list(T)], - ann_c_tuple(Anno, pat_alias_list(Es1, Es2)); -pat_alias(#c_literal{anno=Anno,val=T}, #c_tuple{es=Es2}) when is_tuple(T) -> - Es1 = [#c_literal{val=E} || E <- tuple_to_list(T)], - ann_c_tuple(Anno, pat_alias_list(Es1, Es2)); -pat_alias(#c_tuple{anno=Anno,es=Es1}, #c_tuple{es=Es2}) -> - ann_c_tuple(Anno, pat_alias_list(Es1, Es2)); - -%% alias maps -%% There are no literals in maps patterns (patterns are always abstract) -pat_alias(#c_map{es=Es1}=M,#c_map{es=Es2}) -> - M#c_map{es=pat_alias_map_pairs(Es1++Es2)}; - -pat_alias(#c_alias{var=V1,pat=P1}, - #c_alias{var=V2,pat=P2}) -> - if V1 =:= V2 -> #c_alias{var=V1,pat=pat_alias(P1, P2)}; - true -> #c_alias{var=V1,pat=#c_alias{var=V2,pat=pat_alias(P1, P2)}} +pat_alias(#c_var{name=V1}=P, #c_var{name=V1}) -> P; +pat_alias(#c_var{name=V1}=Var, + #c_alias{var=#c_var{name=V2},pat=Pat}=Alias) -> + if + V1 =:= V2 -> + Alias; + true -> + Alias#c_alias{pat=pat_alias(Var, Pat)} + end; +pat_alias(#c_var{}=P1, P2) -> #c_alias{var=P1,pat=P2}; + +pat_alias(#c_alias{var=#c_var{name=V1}}=Alias, #c_var{name=V1}) -> + Alias; +pat_alias(#c_alias{var=#c_var{name=V1}=Var1,pat=P1}, + #c_alias{var=#c_var{name=V2}=Var2,pat=P2}) -> + Pat = pat_alias(P1, P2), + if + V1 =:= V2 -> + #c_alias{var=Var1,pat=Pat}; + true -> + pat_alias(Var1, pat_alias(Var2, Pat)) 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(#c_alias{var=#c_var{}=Var,pat=P1}, P2) -> + #c_alias{var=Var,pat=pat_alias(P1, P2)}; + +pat_alias(#c_map{es=Es1}=M, #c_map{es=Es2}) -> + M#c_map{es=pat_alias_map_pairs(Es1 ++ Es2)}; + +pat_alias(P1, #c_var{}=Var) -> + #c_alias{var=Var,pat=P1}; +pat_alias(P1, #c_alias{pat=P2}=Alias) -> + Alias#c_alias{pat=pat_alias(P1, P2)}; + pat_alias(P1, P2) -> - case {set_anno(P1, []),set_anno(P2, [])} of - {P,P} -> P; + %% Aliases between binaries are not allowed, so the only + %% legal patterns that remain are data patterns. + case cerl:is_data(P1) andalso cerl:is_data(P2) of + false -> throw(nomatch); + true -> ok + end, + Type = cerl:data_type(P1), + case cerl:data_type(P2) of + Type -> ok; _ -> throw(nomatch) - end. + end, + Es1 = cerl:data_es(P1), + Es2 = cerl:data_es(P2), + Es = pat_alias_list(Es1, Es2), + cerl:make_data(Type, Es). %% pat_alias_list([A1], [A2]) -> [A]. diff --git a/lib/compiler/src/v3_life.erl b/lib/compiler/src/v3_life.erl index cd4b5fd674..75bd188479 100644 --- a/lib/compiler/src/v3_life.erl +++ b/lib/compiler/src/v3_life.erl @@ -270,7 +270,7 @@ match(#k_select{anno=A,var=V,types=Kts}, Ls0, I, Ctxt, Vdb0) -> end, Vdb1 = use_vars(union(A#k.us, Ls1), I, Vdb0), Ts = [type_clause(Tc, Ls1, I+1, Ctxt, Vdb1) || Tc <- Kts], - #l{ke={select,literal2(V, Ctxt),Ts},i=I,vdb=Vdb1,a=Anno}; + #l{ke={select,literal(V, Ctxt),Ts},i=I,vdb=Vdb1,a=Anno}; match(#k_guard{anno=A,clauses=Kcs}, Ls, I, Ctxt, Vdb0) -> Vdb1 = use_vars(union(A#k.us, Ls), I, Vdb0), Cs = [guard_clause(G, Ls, I+1, Ctxt, Vdb1) || G <- Kcs], @@ -297,7 +297,7 @@ val_clause(#k_val_clause{anno=A,val=V,body=Kb}, Ls0, I, Ctxt0, Vdb0) -> _ -> Ctxt0 end, B = match(Kb, Ls1, I+1, Ctxt, Vdb1), - #l{ke={val_clause,literal2(V, Ctxt),B},i=I,vdb=use_vars(Bus, I+1, Vdb1),a=A#k.a}. + #l{ke={val_clause,literal(V, Ctxt),B},i=I,vdb=use_vars(Bus, I+1, Vdb1),a=A#k.a}. guard_clause(#k_guard_clause{anno=A,guard=Kg,body=Kb}, Ls, I, Ctxt, Vdb0) -> Vdb1 = use_vars(union(A#k.us, Ls), I+2, Vdb0), @@ -350,6 +350,7 @@ atomic_list(Ks) -> [atomic(K) || K <- Ks]. %% literal_list([Klit]) -> [Lit]. literal(#k_var{name=N}, _) -> {var,N}; +literal(#k_literal{val=I}, _) -> {literal,I}; literal(#k_int{val=I}, _) -> {integer,I}; literal(#k_float{val=F}, _) -> {float,F}; literal(#k_atom{val=N}, _) -> {atom,N}; @@ -358,58 +359,29 @@ literal(#k_nil{}, _) -> nil; literal(#k_cons{hd=H,tl=T}, Ctxt) -> {cons,[literal(H, Ctxt),literal(T, Ctxt)]}; literal(#k_binary{segs=V}, Ctxt) -> - {binary,literal(V, Ctxt)}; + {binary,literal(V, Ctxt)}; +literal(#k_bin_seg{size=S,unit=U,type=T,flags=Fs,seg=Seg,next=[]}, Ctxt) -> + %% Only occurs in patterns. + {bin_seg,Ctxt,literal(S, Ctxt),U,T,Fs,[literal(Seg, Ctxt)]}; literal(#k_bin_seg{size=S,unit=U,type=T,flags=Fs,seg=Seg,next=N}, Ctxt) -> {bin_seg,Ctxt,literal(S, Ctxt),U,T,Fs, [literal(Seg, Ctxt),literal(N, Ctxt)]}; +literal(#k_bin_int{size=S,unit=U,flags=Fs,val=Int,next=N}, Ctxt) -> + %% Only occurs in patterns. + {bin_int,Ctxt,literal(S, Ctxt),U,Fs,Int, + [literal(N, Ctxt)]}; literal(#k_bin_end{}, Ctxt) -> {bin_end,Ctxt}; literal(#k_tuple{es=Es}, Ctxt) -> {tuple,literal_list(Es, Ctxt)}; -literal(#k_map{op=Op,var=Var,es=Es}, Ctxt) -> - {map,Op,literal(Var, Ctxt),literal_list(Es, Ctxt)}; +literal(#k_map{op=Op,var=Var,es=Es0}, Ctxt) -> + {map,Op,literal(Var, Ctxt),literal_list(Es0, Ctxt)}; literal(#k_map_pair{key=K,val=V}, Ctxt) -> - {map_pair,literal(K, Ctxt),literal(V, Ctxt)}; -literal(#k_literal{val=V}, _Ctxt) -> - {literal,V}. + {map_pair,literal(K, Ctxt),literal(V, Ctxt)}. literal_list(Ks, Ctxt) -> [literal(K, Ctxt) || K <- Ks]. -literal2(#k_var{name=N}, _) -> {var,N}; -literal2(#k_literal{val=I}, _) -> {literal,I}; -literal2(#k_int{val=I}, _) -> {integer,I}; -literal2(#k_float{val=F}, _) -> {float,F}; -literal2(#k_atom{val=N}, _) -> {atom,N}; -%%literal2(#k_char{val=C}, _) -> {char,C}; -literal2(#k_nil{}, _) -> nil; -literal2(#k_cons{hd=H,tl=T}, Ctxt) -> - {cons,[literal2(H, Ctxt),literal2(T, Ctxt)]}; -literal2(#k_binary{segs=V}, Ctxt) -> - {binary,literal2(V, Ctxt)}; -literal2(#k_bin_seg{size=S,unit=U,type=T,flags=Fs,seg=Seg,next=[]}, Ctxt) -> - {bin_seg,Ctxt,literal2(S, Ctxt),U,T,Fs,[literal2(Seg, Ctxt)]}; -literal2(#k_bin_seg{size=S,unit=U,type=T,flags=Fs,seg=Seg,next=N}, Ctxt) -> - {bin_seg,Ctxt,literal2(S, Ctxt),U,T,Fs, - [literal2(Seg, Ctxt),literal2(N, Ctxt)]}; -literal2(#k_bin_int{size=S,unit=U,flags=Fs,val=Int,next=N}, Ctxt) -> - {bin_int,Ctxt,literal2(S, Ctxt),U,Fs,Int, - [literal2(N, Ctxt)]}; -literal2(#k_bin_end{}, Ctxt) -> - {bin_end,Ctxt}; -literal2(#k_tuple{es=Es}, Ctxt) -> - {tuple,literal_list2(Es, Ctxt)}; -literal2(#k_map{op=Op,es=Es}, Ctxt) -> - {map,Op,literal_list2(Es, Ctxt)}; -literal2(#k_map_pair{key=K,val=V}, Ctxt) -> - {map_pair,literal2(K, Ctxt),literal2(V, Ctxt)}. - -literal_list2(Ks, Ctxt) -> - [literal2(K, Ctxt) || K <- Ks]. - -%% literal_bin(#k_bin_seg{size=S,unit=U,type=T,flags=Fs,seg=Seg,next=N}) -> -%% {bin_seg,literal(S),U,T,Fs,[literal(Seg),literal(N)]} - %% is_gc_bif(Name, Arity) -> true|false %% Determines whether the BIF Name/Arity might do a GC. diff --git a/lib/compiler/test/andor_SUITE.erl b/lib/compiler/test/andor_SUITE.erl index 3199440d84..4d7f444c4f 100644 --- a/lib/compiler/test/andor_SUITE.erl +++ b/lib/compiler/test/andor_SUITE.erl @@ -370,6 +370,11 @@ combined(Config) when is_list(Config) -> ?line true = ?COMB(false, blurf, true), ?line true = ?COMB(true, true, blurf), + false = simple_comb(false, false), + false = simple_comb(false, true), + false = simple_comb(true, false), + true = simple_comb(true, true), + ok. -undef(COMB). @@ -396,6 +401,13 @@ comb(A, B, C) -> end, id(Res). +simple_comb(A, B) -> + %% Use Res twice, to ensure that a careless optimization of 'not' + %% doesn't leave Res as a free variable. + Res = A andalso B, + _ = id(not Res), + Res. + %% Test that a boolean expression in a case expression is properly %% optimized (in particular, that the error behaviour is correct). in_case(Config) when is_list(Config) -> diff --git a/lib/compiler/test/core_fold_SUITE.erl b/lib/compiler/test/core_fold_SUITE.erl index 512aada203..bc82eaf5aa 100644 --- a/lib/compiler/test/core_fold_SUITE.erl +++ b/lib/compiler/test/core_fold_SUITE.erl @@ -88,6 +88,7 @@ t_element(Config) when is_list(Config) -> {_,_,_}=Tup -> ?line {'EXIT',{badarg,_}} = (catch element(4, Tup)) end, + {'EXIT',{badarg,_}} = (catch element(1, tuple_size(Tuple))), ok. @@ -106,6 +107,7 @@ setelement(Config) when is_list(Config) -> ?line error = setelement_crash_2({a,b,c,d,e,f}, <<42>>), {'EXIT',{badarg,_}} = (catch setelement(1, not_a_tuple, New)), + {'EXIT',{badarg,_}} = (catch setelement(3, {a,b}, New)), ok. diff --git a/lib/compiler/test/match_SUITE.erl b/lib/compiler/test/match_SUITE.erl index 7522ee985f..9aec0b3d4e 100644 --- a/lib/compiler/test/match_SUITE.erl +++ b/lib/compiler/test/match_SUITE.erl @@ -141,6 +141,13 @@ aliases(Config) when is_list(Config) -> ?line {a,b} = list_alias2([a,b]), ?line {a,b} = list_alias3([a,b]), + %% Non-matching aliases. + none = mixed_aliases(<<42>>), + none = mixed_aliases([b]), + none = mixed_aliases([d]), + none = mixed_aliases({a,42}), + none = mixed_aliases(42), + ok. str_alias(V) -> @@ -244,6 +251,12 @@ list_alias2([X,Y]=[a,b]) -> list_alias3([X,b]=[a,Y]) -> {X,Y}. +mixed_aliases(<<X:8>> = x) -> {a,X}; +mixed_aliases([b] = <<X:8>>) -> {b,X}; +mixed_aliases(<<X:8>> = {a,X}) -> {c,X}; +mixed_aliases([X] = <<X:8>>) -> {d,X}; +mixed_aliases(_) -> none. + %% OTP-7018. match_in_call(Config) when is_list(Config) -> diff --git a/lib/compiler/test/warnings_SUITE.erl b/lib/compiler/test/warnings_SUITE.erl index dcd3910926..d0b7c71be8 100644 --- a/lib/compiler/test/warnings_SUITE.erl +++ b/lib/compiler/test/warnings_SUITE.erl @@ -39,7 +39,7 @@ guard/1,bad_arith/1,bool_cases/1,bad_apply/1, files/1,effect/1,bin_opt_info/1,bin_construction/1, comprehensions/1,maps/1,redundant_boolean_clauses/1, - latin1_fallback/1,underscore/1]). + latin1_fallback/1,underscore/1,no_warnings/1]). % Default timetrap timeout (set in init_per_testcase). -define(default_timeout, ?t:minutes(2)). @@ -65,7 +65,7 @@ groups() -> bad_arith,bool_cases,bad_apply,files,effect, bin_opt_info,bin_construction,comprehensions,maps, redundant_boolean_clauses,latin1_fallback, - underscore]}]. + underscore,no_warnings]}]. init_per_suite(Config) -> Config. @@ -281,7 +281,6 @@ bad_arith(Config) when is_list(Config) -> {3,sys_core_fold,{eval_failure,badarith}}, {9,sys_core_fold,nomatch_guard}, {9,sys_core_fold,{eval_failure,badarith}}, - {9,sys_core_fold,{no_effect,{erlang,is_integer,1}}}, {10,sys_core_fold,nomatch_guard}, {10,sys_core_fold,{eval_failure,badarith}}, {15,sys_core_fold,{eval_failure,badarith}} @@ -719,6 +718,27 @@ underscore(Config) when is_list(Config) -> ok. +no_warnings(Config) when is_list(Config) -> + Ts = [{no_warnings, + <<"-record(r, {s=ordsets:new(),a,b}). + + a() -> + R = #r{}, %No warning expected. + {R#r.a,R#r.b}. + + b(X) -> + T = true, + Var = [X], %No warning expected. + case T of + false -> Var; + true -> [] + end. + ">>, + [], + []}], + run(Config, Ts), + ok. + %%% %%% End of test cases. %%% |