diff options
Diffstat (limited to 'lib/compiler/src')
27 files changed, 1367 insertions, 836 deletions
diff --git a/lib/compiler/src/Makefile b/lib/compiler/src/Makefile index 299b2892fc..f75beaba20 100644 --- a/lib/compiler/src/Makefile +++ b/lib/compiler/src/Makefile @@ -50,6 +50,7 @@ MODULES = \ beam_asm \ beam_block \ beam_bool \ + beam_bs \ beam_bsm \ beam_clean \ beam_dead \ @@ -62,6 +63,7 @@ MODULES = \ beam_opcodes \ beam_peep \ beam_receive \ + beam_reorder \ beam_split \ beam_trim \ beam_type \ diff --git a/lib/compiler/src/beam_asm.erl b/lib/compiler/src/beam_asm.erl index a3201b0f4a..95be471de3 100644 --- a/lib/compiler/src/beam_asm.erl +++ b/lib/compiler/src/beam_asm.erl @@ -30,11 +30,12 @@ module(Code, Abst, SourceFile, Opts) -> {ok,assemble(Code, Abst, SourceFile, Opts)}. -assemble({Mod,Exp,Attr0,Asm0,NumLabels}, Abst, SourceFile, Opts) -> +assemble({Mod,Exp0,Attr0,Asm0,NumLabels}, Abst, SourceFile, Opts) -> {1,Dict0} = beam_dict:atom(Mod, beam_dict:new()), {0,Dict1} = beam_dict:fname(atom_to_list(Mod) ++ ".erl", Dict0), NumFuncs = length(Asm0), {Asm,Attr} = on_load(Asm0, Attr0), + Exp = cerl_sets:from_list(Exp0), {Code,Dict2} = assemble_1(Asm, Exp, Dict1, []), build_file(Code, Attr, Dict2, NumLabels, NumFuncs, Abst, SourceFile, Opts). @@ -61,7 +62,7 @@ insert_on_load_instruction(Is0, Entry) -> Bef ++ [El,on_load|Is]. assemble_1([{function,Name,Arity,Entry,Asm}|T], Exp, Dict0, Acc) -> - Dict1 = case member({Name,Arity}, Exp) of + Dict1 = case cerl_sets:is_element({Name,Arity}, Exp) of true -> beam_dict:export(Name, Arity, Entry, Dict0); false -> diff --git a/lib/compiler/src/beam_block.erl b/lib/compiler/src/beam_block.erl index 0321b1c07b..d1052303e0 100644 --- a/lib/compiler/src/beam_block.erl +++ b/lib/compiler/src/beam_block.erl @@ -23,14 +23,13 @@ -module(beam_block). -export([module/2]). --import(lists, [mapfoldl/3,reverse/1,reverse/2,foldl/3,member/2]). --define(MAXREG, 1024). +-import(lists, [reverse/1,reverse/2,foldl/3,member/2]). -module({Mod,Exp,Attr,Fs0,Lc0}, _Opt) -> - {Fs,Lc} = mapfoldl(fun function/2, Lc0, Fs0), +module({Mod,Exp,Attr,Fs0,Lc}, _Opt) -> + Fs = [function(F) || F <- Fs0], {ok,{Mod,Exp,Attr,Fs,Lc}}. -function({function,Name,Arity,CLabel,Is0}, Lc0) -> +function({function,Name,Arity,CLabel,Is0}) -> try %% Collect basic blocks and optimize them. Is1 = blockify(Is0), @@ -40,11 +39,8 @@ function({function,Name,Arity,CLabel,Is0}, Lc0) -> Is5 = opt_blocks(Is4), Is6 = beam_utils:delete_live_annos(Is5), - %% Optimize bit syntax. - {Is,Lc} = bsm_opt(Is6, Lc0), - %% Done. - {{function,Name,Arity,CLabel,Is},Lc} + {function,Name,Arity,CLabel,Is6} catch Class:Error -> Stack = erlang:get_stacktrace(), @@ -62,56 +58,22 @@ blockify(Is) -> blockify([{loop_rec,{f,Fail},{x,0}},{loop_rec_end,_Lbl},{label,Fail}|Is], Acc) -> %% Useless instruction sequence. blockify(Is, Acc); -blockify([{test,is_atom,{f,Fail},[Reg]}=I| - [{select,select_val,Reg,{f,Fail}, - [{atom,false},{f,_}=BrFalse, - {atom,true}=AtomTrue,{f,_}=BrTrue]}|Is]=Is0], - [{block,Bl}|_]=Acc) -> - case is_last_bool(Bl, Reg) of - false -> - blockify(Is0, [I|Acc]); - true -> - %% The last instruction is a boolean operator/guard BIF that can't fail. - %% We can convert the three-way branch to a two-way branch (eliminating - %% the reference to the failure label). - blockify(Is, [{jump,BrTrue}, - {test,is_eq_exact,BrFalse,[Reg,AtomTrue]}|Acc]) - end; -blockify([{test,is_atom,{f,Fail},[Reg]}=I| - [{select,select_val,Reg,{f,Fail}, - [{atom,true}=AtomTrue,{f,_}=BrTrue, - {atom,false},{f,_}=BrFalse]}|Is]=Is0], - [{block,Bl}|_]=Acc) -> - case is_last_bool(Bl, Reg) of - false -> - blockify(Is0, [I|Acc]); - true -> - blockify(Is, [{jump,BrTrue}, - {test,is_eq_exact,BrFalse,[Reg,AtomTrue]}|Acc]) - end; +blockify([{get_map_elements,F,S,{list,Gets}}|Is0], Acc) -> + %% A get_map_elements instruction is only safe at the beginning of + %% a block because of the failure label. + {Ss,Ds} = beam_utils:split_even(Gets), + I = {set,Ds,[S|Ss],{get_map_elements,F}}, + {Block,Is} = collect_block(Is0, [I]), + blockify(Is, [{block,Block}|Acc]); blockify([I|Is0]=IsAll, Acc) -> - case is_bs_put(I) of - true -> - {BsPuts0,Is} = collect_bs_puts(IsAll), - BsPuts = opt_bs_puts(BsPuts0), - blockify(Is, reverse(BsPuts, Acc)); - false -> - case collect(I) of - error -> blockify(Is0, [I|Acc]); - Instr when is_tuple(Instr) -> - {Block,Is} = collect_block(IsAll), - blockify(Is, [{block,Block}|Acc]) - end + case collect(I) of + error -> blockify(Is0, [I|Acc]); + Instr when is_tuple(Instr) -> + {Block,Is} = collect_block(IsAll), + blockify(Is, [{block,Block}|Acc]) end; blockify([], Acc) -> reverse(Acc). -is_last_bool([{set,[Reg],As,{bif,N,_}}], Reg) -> - Ar = length(As), - erl_internal:new_type_test(N, Ar) orelse erl_internal:comp_op(N, Ar) - orelse erl_internal:bool_op(N, Ar); -is_last_bool([_|Is], Reg) -> is_last_bool(Is, Reg); -is_last_bool([], _) -> false. - collect_block(Is) -> collect_block(Is, []). @@ -146,10 +108,10 @@ collect({get_list,S,D1,D2}) -> {set,[D1,D2],[S],get_list}; collect(remove_message) -> {set,[],[],remove_message}; collect({put_map,F,Op,S,D,R,{list,Puts}}) -> {set,[D],[S|Puts],{alloc,R,{put_map,Op,F}}}; -collect({get_map_elements,F,S,{list,Gets}}) -> - {Ss,Ds} = beam_utils:split_even(Gets), - {set,Ds,[S|Ss],{get_map_elements,F}}; -collect({'catch',R,L}) -> {set,[R],[],{'catch',L}}; +collect({'catch'=Op,R,L}) -> + {set,[R],[],{try_catch,Op,L}}; +collect({'try'=Op,R,L}) -> + {set,[R],[],{try_catch,Op,L}}; collect(fclearerror) -> {set,[],[],fclearerror}; collect({fcheckerror,{f,0}}) -> {set,[],[],fcheckerror}; collect({fmove,S,D}) -> {set,[D],[S],fmove}; @@ -183,7 +145,9 @@ opt_blocks([I|Is]) -> opt_blocks([]) -> []. opt_block(Is0) -> - Is = find_fixpoint(fun opt/1, Is0), + Is = find_fixpoint(fun(Is) -> + opt_tuple_element(opt(Is)) + end, Is0), opt_alloc(Is). find_fixpoint(OptFun, Is0) -> @@ -279,76 +243,151 @@ opt_moves([X0,Y0], Is0) -> not_possible -> {[X,Y0],Is2}; {X,_} -> {[X,Y0],Is2}; {Y,Is} -> {[X,Y],Is} - end; -opt_moves(Ds, Is) -> - %% multiple destinations -> pass through - {Ds,Is}. - + end. %% opt_move(Dest, [Instruction]) -> {UpdatedDest,[Instruction]} | not_possible %% If there is a {move,Dest,FinalDest} instruction %% in the instruction stream, remove the move instruction %% and let FinalDest be the destination. -%% -%% For this optimization to be safe, we must be sure that -%% Dest will not be referenced in any other by other instructions -%% in the rest of the instruction stream. Not even the indirect -%% reference by an instruction that may allocate (such as -%% test_heap/2 or a GC Bif) is allowed. opt_move(Dest, Is) -> - opt_move_1(Dest, Is, ?MAXREG, []). - -opt_move_1(R, [{set,_,_,{alloc,Live,_}}|_]=Is, SafeRegs, Acc) when Live < SafeRegs -> - %% Downgrade number of safe regs and rescan the instruction, as it most probably - %% is a gc_bif instruction. - opt_move_1(R, Is, Live, Acc); -opt_move_1(R, [{set,[{x,X}=D],[R],move}|Is], SafeRegs, Acc) -> - case X < SafeRegs andalso beam_utils:is_killed_block(R, Is) of - true -> opt_move_2(D, Acc, Is); - false -> not_possible + opt_move_1(Dest, Is, []). + +opt_move_1(R, [{set,[D],[R],move}|Is0], Acc) -> + %% Provided that the source register is killed by instructions + %% that follow, the optimization is safe. + case eliminate_use_of_from_reg(Is0, R, D, []) of + {yes,Is} -> opt_move_rev(D, Acc, Is); + no -> not_possible end; -opt_move_1(R, [{set,[D],[R],move}|Is], _SafeRegs, Acc) -> - case beam_utils:is_killed_block(R, Is) of - true -> opt_move_2(D, Acc, Is); - false -> not_possible +opt_move_1({x,_}, [{set,_,_,{alloc,_,_}}|_], _) -> + %% The optimization is not possible. If the X register is not + %% killed by allocation, the optimization would not be safe. + %% If the X register is killed, it means that there cannot + %% follow a 'move' instruction with this X register as the + %% source. + not_possible; +opt_move_1(R, [{set,_,_,_}=I|Is], Acc) -> + %% If the source register is either killed or used by this + %% instruction, the optimimization is not possible. + case is_killed_or_used(R, I) of + true -> not_possible; + false -> opt_move_1(R, Is, [I|Acc]) end; -opt_move_1(R, [I|Is], SafeRegs, Acc) -> - case is_transparent(R, I) of - false -> not_possible; - true -> opt_move_1(R, Is, SafeRegs, [I|Acc]) - end. +opt_move_1(_, _, _) -> + not_possible. + +%% opt_tuple_element([Instruction]) -> [Instruction] +%% If possible, move get_tuple_element instructions forward +%% in the instruction stream to a move instruction, eliminating +%% the move instruction. Example: +%% +%% get_tuple_element Tuple Pos Dst1 +%% ... +%% move Dst1 Dst2 +%% +%% This code may be possible to rewrite to: +%% +%% %%(Moved get_tuple_element instruction) +%% ... +%% get_tuple_element Tuple Pos Dst2 +%% + +opt_tuple_element([{set,[D],[S],{get_tuple_element,_}}=I|Is0]) -> + case opt_tuple_element_1(Is0, I, {S,D}, []) of + no -> + [I|opt_tuple_element(Is0)]; + {yes,Is} -> + opt_tuple_element(Is) + end; +opt_tuple_element([I|Is]) -> + [I|opt_tuple_element(Is)]; +opt_tuple_element([]) -> []. + +opt_tuple_element_1([{set,_,_,{alloc,_,_}}|_], _, _, _) -> + no; +opt_tuple_element_1([{set,_,_,{try_catch,_,_}}|_], _, _, _) -> + no; +opt_tuple_element_1([{set,[D],[S],move}|Is0], I0, {_,S}, Acc) -> + case eliminate_use_of_from_reg(Is0, S, D, []) of + no -> + no; + {yes,Is} -> + {set,[S],Ss,Op} = I0, + I = {set,[D],Ss,Op}, + {yes,reverse(Acc, [I|Is])} + end; +opt_tuple_element_1([{set,Ds,Ss,_}=I|Is], MovedI, {S,D}=Regs, Acc) -> + case member(S, Ds) orelse member(D, Ss) of + true -> + no; + false -> + opt_tuple_element_1(Is, MovedI, Regs, [I|Acc]) + end; +opt_tuple_element_1(_, _, _, _) -> no. -%% Reverse the instructions, while checking that there are no instructions that -%% would interfere with using the new destination register chosen. +%% Reverse the instructions, while checking that there are no +%% instructions that would interfere with using the new destination +%% register (D). -opt_move_2(D, [I|Is], Acc) -> - case is_transparent(D, I) of - false -> not_possible; - true -> opt_move_2(D, Is, [I|Acc]) +opt_move_rev(D, [I|Is], Acc) -> + case is_killed_or_used(D, I) of + true -> not_possible; + false -> opt_move_rev(D, Is, [I|Acc]) end; -opt_move_2(D, [], Acc) -> {D,Acc}. - -%% is_transparent(Register, Instruction) -> true | false -%% Returns true if Instruction does not in any way references Register -%% (even indirectly by an allocation instruction). -%% Returns false if Instruction does reference Register, or we are -%% not sure. - -is_transparent({x,X}, {set,_,_,{alloc,Live,_}}) when X < Live -> - false; -is_transparent(R, {set,Ds,Ss,_Op}) -> - case member(R, Ds) of - true -> false; - false -> not member(R, Ss) +opt_move_rev(D, [], Acc) -> {D,Acc}. + +%% is_killed_or_used(Register, {set,_,_,_}) -> bool() +%% Test whether the register is used by the instruction. + +is_killed_or_used(R, {set,Ss,Ds,_}) -> + member(R, Ds) orelse member(R, Ss). + +%% eliminate_use_of_from_reg([Instruction], FromRegister, ToRegister, Acc) -> +%% {yes,Is} | no +%% Eliminate any use of FromRegister in the instruction sequence +%% by replacing uses of FromRegister with ToRegister. If FromRegister +%% is referenced by an allocation instruction, return 'no' to indicate +%% that FromRegister is still used and that the optimization is not +%% possible. + +eliminate_use_of_from_reg([{set,_,_,{alloc,Live,_}}|_]=Is0, {x,X}, _, Acc) -> + if + X < Live -> + no; + true -> + {yes,reverse(Acc, Is0)} + end; +eliminate_use_of_from_reg([{set,Ds,Ss0,Op}=I0|Is], From, To, Acc) -> + I = case member(From, Ss0) of + true -> + Ss = [case S of + From -> To; + _ -> S + end || S <- Ss0], + {set,Ds,Ss,Op}; + false -> + I0 + end, + case member(From, Ds) of + true -> + {yes,reverse(Acc, [I|Is])}; + false -> + eliminate_use_of_from_reg(Is, From, To, [I|Acc]) end; -is_transparent(_, _) -> false. +eliminate_use_of_from_reg([I]=Is, From, _To, Acc) -> + case beam_utils:is_killed_block(From, [I]) of + true -> + {yes,reverse(Acc, Is)}; + false -> + no + end. %% opt_alloc(Instructions) -> Instructions' %% Optimises all allocate instructions. opt_alloc([{set,[],[],{alloc,R,{_,Ns,Nh,[]}}}|Is]) -> - [{set,[],[],opt_alloc(Is, Ns, Nh, R)}|opt(Is)]; + [{set,[],[],opt_alloc(Is, Ns, Nh, R)}|Is]; opt_alloc([I|Is]) -> [I|opt_alloc(Is)]; opt_alloc([]) -> []. @@ -414,234 +453,3 @@ x_dead([], Regs) -> Regs. 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. - -%%% -%%% Evaluation of constant bit fields. -%%% - -is_bs_put({bs_put,_,{bs_put_integer,_,_},_}) -> true; -is_bs_put({bs_put,_,{bs_put_float,_,_},_}) -> true; -is_bs_put(_) -> false. - -collect_bs_puts(Is) -> - collect_bs_puts_1(Is, []). - -collect_bs_puts_1([I|Is]=Is0, Acc) -> - case is_bs_put(I) of - false -> {reverse(Acc),Is0}; - true -> collect_bs_puts_1(Is, [I|Acc]) - end. - -opt_bs_puts(Is) -> - opt_bs_1(Is, []). - -opt_bs_1([{bs_put,Fail, - {bs_put_float,1,Flags0},[{integer,Sz},Src]}=I0|Is], Acc) -> - try eval_put_float(Src, Sz, Flags0) of - <<Int:Sz>> -> - Flags = force_big(Flags0), - I = {bs_put,Fail,{bs_put_integer,1,Flags}, - [{integer,Sz},{integer,Int}]}, - opt_bs_1([I|Is], Acc) - catch - error:_ -> - opt_bs_1(Is, [I0|Acc]) - end; -opt_bs_1([{bs_put,_,{bs_put_integer,1,_},[{integer,8},{integer,_}]}|_]=IsAll, - Acc0) -> - {Is,Acc} = bs_collect_string(IsAll, Acc0), - opt_bs_1(Is, Acc); -opt_bs_1([{bs_put,Fail,{bs_put_integer,1,F},[{integer,Sz},{integer,N}]}=I|Is0], - Acc) when Sz > 8 -> - case field_endian(F) of - big -> - %% We can do this optimization for any field size without risk - %% for code explosion. - case bs_split_int(N, Sz, Fail, Is0) of - no_split -> opt_bs_1(Is0, [I|Acc]); - Is -> opt_bs_1(Is, Acc) - end; - little when Sz < 128 -> - %% We only try to optimize relatively small fields, to avoid - %% an explosion in code size. - <<Int:Sz>> = <<N:Sz/little>>, - Flags = force_big(F), - Is = [{bs_put,Fail,{bs_put_integer,1,Flags}, - [{integer,Sz},{integer,Int}]}|Is0], - opt_bs_1(Is, Acc); - _ -> %native or too wide little field - opt_bs_1(Is0, [I|Acc]) - end; -opt_bs_1([{bs_put,Fail,{Op,U,F},[{integer,Sz},Src]}|Is], Acc) when U > 1 -> - opt_bs_1([{bs_put,Fail,{Op,1,F},[{integer,U*Sz},Src]}|Is], Acc); -opt_bs_1([I|Is], Acc) -> - opt_bs_1(Is, [I|Acc]); -opt_bs_1([], Acc) -> reverse(Acc). - -eval_put_float(Src, Sz, Flags) when Sz =< 256 -> %Only evaluate if Sz is reasonable. - Val = value(Src), - case field_endian(Flags) of - little -> <<Val:Sz/little-float-unit:1>>; - big -> <<Val:Sz/big-float-unit:1>> - %% native intentionally not handled here - we can't optimize it. - end. - -value({integer,I}) -> I; -value({float,F}) -> F. - -bs_collect_string(Is, [{bs_put,_,{bs_put_string,Len,{string,Str}},[]}|Acc]) -> - bs_coll_str_1(Is, Len, reverse(Str), Acc); -bs_collect_string(Is, Acc) -> - bs_coll_str_1(Is, 0, [], Acc). - -bs_coll_str_1([{bs_put,_,{bs_put_integer,U,_},[{integer,Sz},{integer,V}]}|Is], - Len, StrAcc, IsAcc) when U*Sz =:= 8 -> - Byte = V band 16#FF, - bs_coll_str_1(Is, Len+1, [Byte|StrAcc], IsAcc); -bs_coll_str_1(Is, Len, StrAcc, IsAcc) -> - {Is,[{bs_put,{f,0},{bs_put_string,Len,{string,reverse(StrAcc)}},[]}|IsAcc]}. - -field_endian({field_flags,F}) -> field_endian_1(F). - -field_endian_1([big=E|_]) -> E; -field_endian_1([little=E|_]) -> E; -field_endian_1([native=E|_]) -> E; -field_endian_1([_|Fs]) -> field_endian_1(Fs). - -force_big({field_flags,F}) -> - {field_flags,force_big_1(F)}. - -force_big_1([big|_]=Fs) -> Fs; -force_big_1([little|Fs]) -> [big|Fs]; -force_big_1([F|Fs]) -> [F|force_big_1(Fs)]. - -bs_split_int(0, Sz, _, _) when Sz > 64 -> - %% We don't want to split in this case because the - %% string will consist of only zeroes. - no_split; -bs_split_int(-1, Sz, _, _) when Sz > 64 -> - %% We don't want to split in this case because the - %% string will consist of only 255 bytes. - no_split; -bs_split_int(N, Sz, Fail, Acc) -> - FirstByteSz = case Sz rem 8 of - 0 -> 8; - Rem -> Rem - end, - bs_split_int_1(N, FirstByteSz, Sz, Fail, Acc). - -bs_split_int_1(-1, _, Sz, Fail, Acc) when Sz > 64 -> - I = {bs_put,Fail,{bs_put_integer,1,{field_flags,[big]}}, - [{integer,Sz},{integer,-1}]}, - [I|Acc]; -bs_split_int_1(0, _, Sz, Fail, Acc) when Sz > 64 -> - I = {bs_put,Fail,{bs_put_integer,1,{field_flags,[big]}}, - [{integer,Sz},{integer,0}]}, - [I|Acc]; -bs_split_int_1(N, ByteSz, Sz, Fail, Acc) when Sz > 0 -> - Mask = (1 bsl ByteSz) - 1, - I = {bs_put,Fail,{bs_put_integer,1,{field_flags,[big]}}, - [{integer,ByteSz},{integer,N band Mask}]}, - bs_split_int_1(N bsr ByteSz, 8, Sz-ByteSz, Fail, [I|Acc]); -bs_split_int_1(_, _, _, _, Acc) -> Acc. - - -%%% -%%% Optimization of new bit syntax matching: get rid -%%% of redundant bs_restore2/2 instructions across select_val -%%% instructions, as well as a few other simple peep-hole optimizations. -%%% - -bsm_opt(Is0, Lc0) -> - {Is1,D0,Lc} = bsm_scan(Is0, [], Lc0, []), - Is2 = case D0 of - [] -> - Is1; - _ -> - D = gb_trees:from_orddict(orddict:from_list(D0)), - bsm_reroute(Is1, D, none, []) - end, - Is = beam_clean:bs_clean_saves(Is2), - {bsm_opt_2(Is, []),Lc}. - -bsm_scan([{label,L}=Lbl,{bs_restore2,_,Save}=R|Is], D0, Lc, Acc0) -> - D = [{{L,Save},Lc}|D0], - Acc = [{label,Lc},R,Lbl|Acc0], - bsm_scan(Is, D, Lc+1, Acc); -bsm_scan([I|Is], D, Lc, Acc) -> - bsm_scan(Is, D, Lc, [I|Acc]); -bsm_scan([], D, Lc, Acc) -> - {reverse(Acc),D,Lc}. - -bsm_reroute([{bs_save2,Reg,Save}=I|Is], D, _, Acc) -> - bsm_reroute(Is, D, {Reg,Save}, [I|Acc]); -bsm_reroute([{bs_restore2,Reg,Save}=I|Is], D, _, Acc) -> - bsm_reroute(Is, D, {Reg,Save}, [I|Acc]); -bsm_reroute([{label,_}=I|Is], D, S, Acc) -> - bsm_reroute(Is, D, S, [I|Acc]); -bsm_reroute([{select,select_val,Reg,F0,Lbls0}|Is], D, {_,Save}=S, Acc0) -> - [F|Lbls] = bsm_subst_labels([F0|Lbls0], Save, D), - Acc = [{select,select_val,Reg,F,Lbls}|Acc0], - bsm_reroute(Is, D, S, Acc); -bsm_reroute([{test,TestOp,F0,TestArgs}=I|Is], D, {_,Save}=S, Acc0) -> - F = bsm_subst_label(F0, Save, D), - Acc = [{test,TestOp,F,TestArgs}|Acc0], - case bsm_not_bs_test(I) of - true -> - %% The test instruction will not update the bit offset for the - %% binary being matched. Therefore the save position can be kept. - bsm_reroute(Is, D, S, Acc); - false -> - %% The test instruction might update the bit offset. Kill our - %% remembered Save position. - bsm_reroute(Is, D, none, Acc) - end; -bsm_reroute([{test,TestOp,F0,Live,TestArgs,Dst}|Is], D, {_,Save}, Acc0) -> - F = bsm_subst_label(F0, Save, D), - Acc = [{test,TestOp,F,Live,TestArgs,Dst}|Acc0], - %% The test instruction will update the bit offset. Kill our - %% remembered Save position. - bsm_reroute(Is, D, none, Acc); -bsm_reroute([{block,[{set,[],[],{alloc,_,_}}]}=Bl, - {bs_context_to_binary,_}=I|Is], D, S, Acc) -> - %% To help further bit syntax optimizations. - bsm_reroute([I,Bl|Is], D, S, Acc); -bsm_reroute([I|Is], D, _, Acc) -> - bsm_reroute(Is, D, none, [I|Acc]); -bsm_reroute([], _, _, Acc) -> reverse(Acc). - -bsm_opt_2([{test,bs_test_tail2,F,[Ctx,Bits]}|Is], - [{test,bs_skip_bits2,F,[Ctx,{integer,I},Unit,_Flags]}|Acc]) -> - bsm_opt_2(Is, [{test,bs_test_tail2,F,[Ctx,Bits+I*Unit]}|Acc]); -bsm_opt_2([{test,bs_skip_bits2,F,[Ctx,{integer,I1},Unit1,_]}|Is], - [{test,bs_skip_bits2,F,[Ctx,{integer,I2},Unit2,Flags]}|Acc]) -> - bsm_opt_2(Is, [{test,bs_skip_bits2,F, - [Ctx,{integer,I1*Unit1+I2*Unit2},1,Flags]}|Acc]); -bsm_opt_2([I|Is], Acc) -> - bsm_opt_2(Is, [I|Acc]); -bsm_opt_2([], Acc) -> reverse(Acc). - -%% bsm_not_bs_test({test,Name,_,Operands}) -> true|false. -%% Test whether is the test is a "safe", i.e. does not move the -%% bit offset for a binary. -%% -%% 'true' means that the test is safe, 'false' that we don't know or -%% that the test moves the offset (e.g. bs_get_integer2). - -bsm_not_bs_test({test,bs_test_tail2,_,[_,_]}) -> true; -bsm_not_bs_test(Test) -> beam_utils:is_pure_test(Test). - -bsm_subst_labels(Fs, Save, D) -> - bsm_subst_labels_1(Fs, Save, D, []). - -bsm_subst_labels_1([F|Fs], Save, D, Acc) -> - bsm_subst_labels_1(Fs, Save, D, [bsm_subst_label(F, Save, D)|Acc]); -bsm_subst_labels_1([], _, _, Acc) -> - reverse(Acc). - -bsm_subst_label({f,Lbl0}=F, Save, D) -> - case gb_trees:lookup({Lbl0,Save}, D) of - {value,Lbl} -> {f,Lbl}; - none -> F - end; -bsm_subst_label(Other, _, _) -> Other. diff --git a/lib/compiler/src/beam_bool.erl b/lib/compiler/src/beam_bool.erl index d14be83496..efd935f666 100644 --- a/lib/compiler/src/beam_bool.erl +++ b/lib/compiler/src/beam_bool.erl @@ -25,8 +25,6 @@ -import(lists, [reverse/1,reverse/2,foldl/3,mapfoldl/3,map/2]). --define(MAXREG, 1024). - -record(st, {next, %Next label number. ll %Live regs at labels. diff --git a/lib/compiler/src/beam_bs.erl b/lib/compiler/src/beam_bs.erl new file mode 100644 index 0000000000..55fa7ce10c --- /dev/null +++ b/lib/compiler/src/beam_bs.erl @@ -0,0 +1,278 @@ +%% +%% %CopyrightBegin% +%% +%% Copyright Ericsson AB 1999-2013. All Rights Reserved. +%% +%% Licensed under the Apache License, Version 2.0 (the "License"); +%% you may not use this file except in compliance with the License. +%% You may obtain a copy of the License at +%% +%% http://www.apache.org/licenses/LICENSE-2.0 +%% +%% Unless required by applicable law or agreed to in writing, software +%% distributed under the License is distributed on an "AS IS" BASIS, +%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +%% See the License for the specific language governing permissions and +%% limitations under the License. +%% +%% %CopyrightEnd% +%% +%% Purpose : Partitions assembly instructions into basic blocks and +%% optimizes them. + +-module(beam_bs). + +-export([module/2]). +-import(lists, [mapfoldl/3,reverse/1]). + +module({Mod,Exp,Attr,Fs0,Lc0}, _Opt) -> + {Fs,Lc} = mapfoldl(fun function/2, Lc0, Fs0), + {ok,{Mod,Exp,Attr,Fs,Lc}}. + +function({function,Name,Arity,CLabel,Is0}, Lc0) -> + try + Is1 = bs_put_opt(Is0), + {Is,Lc} = bsm_opt(Is1, Lc0), + {{function,Name,Arity,CLabel,Is},Lc} + catch + Class:Error -> + Stack = erlang:get_stacktrace(), + io:fwrite("Function: ~w/~w\n", [Name,Arity]), + erlang:raise(Class, Error, Stack) + end. + +%%% +%%% Evaluation of constant bit fields. +%%% + +bs_put_opt([{bs_put,_,_,_}=I|Is0]) -> + {BsPuts0,Is} = collect_bs_puts(Is0, [I]), + BsPuts = opt_bs_puts(BsPuts0), + BsPuts ++ bs_put_opt(Is); +bs_put_opt([I|Is]) -> + [I|bs_put_opt(Is)]; +bs_put_opt([]) -> []. + +collect_bs_puts([{bs_put,_,_,_}=I|Is], Acc) -> + collect_bs_puts(Is, [I|Acc]); +collect_bs_puts([_|_]=Is, Acc) -> + {reverse(Acc),Is}. + +opt_bs_puts(Is) -> + opt_bs_1(Is, []). + +opt_bs_1([{bs_put,Fail, + {bs_put_float,1,Flags0},[{integer,Sz},Src]}=I0|Is], Acc) -> + try eval_put_float(Src, Sz, Flags0) of + <<Int:Sz>> -> + Flags = force_big(Flags0), + I = {bs_put,Fail,{bs_put_integer,1,Flags}, + [{integer,Sz},{integer,Int}]}, + opt_bs_1([I|Is], Acc) + catch + error:_ -> + opt_bs_1(Is, [I0|Acc]) + end; +opt_bs_1([{bs_put,_,{bs_put_integer,1,_},[{integer,8},{integer,_}]}|_]=IsAll, + Acc0) -> + {Is,Acc} = bs_collect_string(IsAll, Acc0), + opt_bs_1(Is, Acc); +opt_bs_1([{bs_put,Fail,{bs_put_integer,1,F},[{integer,Sz},{integer,N}]}=I|Is0], + Acc) when Sz > 8 -> + case field_endian(F) of + big -> + %% We can do this optimization for any field size without + %% risk for code explosion. + case bs_split_int(N, Sz, Fail, Is0) of + no_split -> opt_bs_1(Is0, [I|Acc]); + Is -> opt_bs_1(Is, Acc) + end; + little when Sz < 128 -> + %% We only try to optimize relatively small fields, to + %% avoid an explosion in code size. + <<Int:Sz>> = <<N:Sz/little>>, + Flags = force_big(F), + Is = [{bs_put,Fail,{bs_put_integer,1,Flags}, + [{integer,Sz},{integer,Int}]}|Is0], + opt_bs_1(Is, Acc); + _ -> %native or too wide little field + opt_bs_1(Is0, [I|Acc]) + end; +opt_bs_1([{bs_put,Fail,{Op,U,F},[{integer,Sz},Src]}|Is], Acc) when U > 1 -> + opt_bs_1([{bs_put,Fail,{Op,1,F},[{integer,U*Sz},Src]}|Is], Acc); +opt_bs_1([I|Is], Acc) -> + opt_bs_1(Is, [I|Acc]); +opt_bs_1([], Acc) -> reverse(Acc). + +eval_put_float(Src, Sz, Flags) when Sz =< 256 -> + %%Only evaluate if Sz is reasonable. + Val = value(Src), + case field_endian(Flags) of + little -> <<Val:Sz/little-float-unit:1>>; + big -> <<Val:Sz/big-float-unit:1>> + %% native intentionally not handled here - we can't optimize + %% it. + end. + +value({integer,I}) -> I; +value({float,F}) -> F. + +bs_collect_string(Is, [{bs_put,_,{bs_put_string,Len,{string,Str}},[]}|Acc]) -> + bs_coll_str_1(Is, Len, reverse(Str), Acc); +bs_collect_string(Is, Acc) -> + bs_coll_str_1(Is, 0, [], Acc). + +bs_coll_str_1([{bs_put,_,{bs_put_integer,U,_},[{integer,Sz},{integer,V}]}|Is], + Len, StrAcc, IsAcc) when U*Sz =:= 8 -> + Byte = V band 16#FF, + bs_coll_str_1(Is, Len+1, [Byte|StrAcc], IsAcc); +bs_coll_str_1(Is, Len, StrAcc, IsAcc) -> + {Is,[{bs_put,{f,0},{bs_put_string,Len,{string,reverse(StrAcc)}},[]}|IsAcc]}. + +field_endian({field_flags,F}) -> field_endian_1(F). + +field_endian_1([big=E|_]) -> E; +field_endian_1([little=E|_]) -> E; +field_endian_1([native=E|_]) -> E; +field_endian_1([_|Fs]) -> field_endian_1(Fs). + +force_big({field_flags,F}) -> + {field_flags,force_big_1(F)}. + +force_big_1([big|_]=Fs) -> Fs; +force_big_1([little|Fs]) -> [big|Fs]; +force_big_1([F|Fs]) -> [F|force_big_1(Fs)]. + +bs_split_int(0, Sz, _, _) when Sz > 64 -> + %% We don't want to split in this case because the + %% string will consist of only zeroes. + no_split; +bs_split_int(-1, Sz, _, _) when Sz > 64 -> + %% We don't want to split in this case because the + %% string will consist of only 255 bytes. + no_split; +bs_split_int(N, Sz, Fail, Acc) -> + FirstByteSz = case Sz rem 8 of + 0 -> 8; + Rem -> Rem + end, + bs_split_int_1(N, FirstByteSz, Sz, Fail, Acc). + +bs_split_int_1(-1, _, Sz, Fail, Acc) when Sz > 64 -> + I = {bs_put,Fail,{bs_put_integer,1,{field_flags,[big]}}, + [{integer,Sz},{integer,-1}]}, + [I|Acc]; +bs_split_int_1(0, _, Sz, Fail, Acc) when Sz > 64 -> + I = {bs_put,Fail,{bs_put_integer,1,{field_flags,[big]}}, + [{integer,Sz},{integer,0}]}, + [I|Acc]; +bs_split_int_1(N, ByteSz, Sz, Fail, Acc) when Sz > 0 -> + Mask = (1 bsl ByteSz) - 1, + I = {bs_put,Fail,{bs_put_integer,1,{field_flags,[big]}}, + [{integer,ByteSz},{integer,N band Mask}]}, + bs_split_int_1(N bsr ByteSz, 8, Sz-ByteSz, Fail, [I|Acc]); +bs_split_int_1(_, _, _, _, Acc) -> Acc. + +%%% +%%% Optimization of bit syntax matching: get rid +%%% of redundant bs_restore2/2 instructions across select_val +%%% instructions, as well as a few other simple peep-hole +%%% optimizations. +%%% + +bsm_opt(Is0, Lc0) -> + {Is1,D0,Lc} = bsm_scan(Is0, [], Lc0, []), + Is2 = case D0 of + [] -> + %% No bit syntax matching in this function. + Is1; + [_|_] -> + %% Optimize the bit syntax matching. + D = gb_trees:from_orddict(orddict:from_list(D0)), + bsm_reroute(Is1, D, none, []) + end, + Is = beam_clean:bs_clean_saves(Is2), + {bsm_opt_2(Is, []),Lc}. + +bsm_scan([{label,L}=Lbl,{bs_restore2,_,Save}=R|Is], D0, Lc, Acc0) -> + D = [{{L,Save},Lc}|D0], + Acc = [{label,Lc},R,Lbl|Acc0], + bsm_scan(Is, D, Lc+1, Acc); +bsm_scan([I|Is], D, Lc, Acc) -> + bsm_scan(Is, D, Lc, [I|Acc]); +bsm_scan([], D, Lc, Acc) -> + {reverse(Acc),D,Lc}. + +bsm_reroute([{bs_save2,Reg,Save}=I|Is], D, _, Acc) -> + bsm_reroute(Is, D, {Reg,Save}, [I|Acc]); +bsm_reroute([{bs_restore2,Reg,Save}=I|Is], D, _, Acc) -> + bsm_reroute(Is, D, {Reg,Save}, [I|Acc]); +bsm_reroute([{label,_}=I|Is], D, S, Acc) -> + bsm_reroute(Is, D, S, [I|Acc]); +bsm_reroute([{select,select_val,Reg,F0,Lbls0}|Is], D, {_,Save}=S, Acc0) -> + [F|Lbls] = bsm_subst_labels([F0|Lbls0], Save, D), + Acc = [{select,select_val,Reg,F,Lbls}|Acc0], + bsm_reroute(Is, D, S, Acc); +bsm_reroute([{test,TestOp,F0,TestArgs}=I|Is], D, {_,Save}=S, Acc0) -> + F = bsm_subst_label(F0, Save, D), + Acc = [{test,TestOp,F,TestArgs}|Acc0], + case bsm_not_bs_test(I) of + true -> + %% The test instruction will not update the bit offset for + %% the binary being matched. Therefore the save position + %% can be kept. + bsm_reroute(Is, D, S, Acc); + false -> + %% The test instruction might update the bit offset. Kill + %% our remembered Save position. + bsm_reroute(Is, D, none, Acc) + end; +bsm_reroute([{test,TestOp,F0,Live,TestArgs,Dst}|Is], D, {_,Save}, Acc0) -> + F = bsm_subst_label(F0, Save, D), + Acc = [{test,TestOp,F,Live,TestArgs,Dst}|Acc0], + %% The test instruction will update the bit offset. Kill our + %% remembered Save position. + bsm_reroute(Is, D, none, Acc); +bsm_reroute([{block,[{set,[],[],{alloc,_,_}}]}=Bl, + {bs_context_to_binary,_}=I|Is], D, S, Acc) -> + %% To help further bit syntax optimizations. + bsm_reroute([I,Bl|Is], D, S, Acc); +bsm_reroute([I|Is], D, _, Acc) -> + bsm_reroute(Is, D, none, [I|Acc]); +bsm_reroute([], _, _, Acc) -> reverse(Acc). + +bsm_opt_2([{test,bs_test_tail2,F,[Ctx,Bits]}|Is], + [{test,bs_skip_bits2,F,[Ctx,{integer,I},Unit,_Flags]}|Acc]) -> + bsm_opt_2(Is, [{test,bs_test_tail2,F,[Ctx,Bits+I*Unit]}|Acc]); +bsm_opt_2([{test,bs_skip_bits2,F,[Ctx,{integer,I1},Unit1,_]}|Is], + [{test,bs_skip_bits2,F,[Ctx,{integer,I2},Unit2,Flags]}|Acc]) -> + bsm_opt_2(Is, [{test,bs_skip_bits2,F, + [Ctx,{integer,I1*Unit1+I2*Unit2},1,Flags]}|Acc]); +bsm_opt_2([I|Is], Acc) -> + bsm_opt_2(Is, [I|Acc]); +bsm_opt_2([], Acc) -> reverse(Acc). + +%% bsm_not_bs_test({test,Name,_,Operands}) -> true|false. +%% Test whether is the test is a "safe", i.e. does not move the +%% bit offset for a binary. +%% +%% 'true' means that the test is safe, 'false' that we don't know or +%% that the test moves the offset (e.g. bs_get_integer2). + +bsm_not_bs_test({test,bs_test_tail2,_,[_,_]}) -> true; +bsm_not_bs_test(Test) -> beam_utils:is_pure_test(Test). + +bsm_subst_labels(Fs, Save, D) -> + bsm_subst_labels_1(Fs, Save, D, []). + +bsm_subst_labels_1([F|Fs], Save, D, Acc) -> + bsm_subst_labels_1(Fs, Save, D, [bsm_subst_label(F, Save, D)|Acc]); +bsm_subst_labels_1([], _, _, Acc) -> + reverse(Acc). + +bsm_subst_label({f,Lbl0}=F, Save, D) -> + case gb_trees:lookup({Lbl0,Save}, D) of + {value,Lbl} -> {f,Lbl}; + none -> F + end; +bsm_subst_label(Other, _, _) -> Other. diff --git a/lib/compiler/src/beam_clean.erl b/lib/compiler/src/beam_clean.erl index 919ee3ee7d..d9108c383d 100644 --- a/lib/compiler/src/beam_clean.erl +++ b/lib/compiler/src/beam_clean.erl @@ -141,7 +141,7 @@ renumber_labels([{bif,is_record,{f,_}, renumber_labels(Is, Acc, St); renumber_labels([{test,is_record,{f,_}=Fail, [Term,{atom,Tag}=TagAtom,{integer,Arity}]}|Is0], Acc, St) -> - Tmp = {x,1023}, + Tmp = {x,1022}, Is = case is_record_tuple(Term, Tag, Arity) of yes -> Is0; @@ -190,17 +190,11 @@ replace([{test,Test,{f,Lbl},Ops}|Is], Acc, D) -> replace([{test,Test,{f,Lbl},Live,Ops,Dst}|Is], Acc, D) -> replace(Is, [{test,Test,{f,label(Lbl, D)},Live,Ops,Dst}|Acc], D); replace([{select,I,R,{f,Fail0},Vls0}|Is], Acc, D) -> - Vls1 = map(fun ({f,L}) -> {f,label(L, D)}; - (Other) -> Other end, Vls0), + Vls = map(fun ({f,L}) -> {f,label(L, D)}; + (Other) -> Other + end, Vls0), Fail = label(Fail0, D), - case redundant_values(Vls1, Fail, []) of - [] -> - %% Oops, no choices left. The loader will not accept that. - %% Convert to a plain jump. - replace(Is, [{jump,{f,Fail}}|Acc], D); - Vls -> - replace(Is, [{select,I,R,{f,Fail},Vls}|Acc], D) - end; + replace(Is, [{select,I,R,{f,Fail},Vls}|Acc], D); replace([{'try',R,{f,Lbl}}|Is], Acc, D) -> replace(Is, [{'try',R,{f,label(Lbl, D)}}|Acc], D); replace([{'catch',R,{f,Lbl}}|Is], Acc, D) -> @@ -241,12 +235,6 @@ label(Old, D) -> {value,Val} -> Val; none -> throw({error,{undefined_label,Old}}) end. - -redundant_values([_,{f,Fail}|Vls], Fail, Acc) -> - redundant_values(Vls, Fail, Acc); -redundant_values([Val,Lbl|Vls], Fail, Acc) -> - redundant_values(Vls, Fail, [Lbl,Val|Acc]); -redundant_values([], _, Acc) -> reverse(Acc). %%% %%% Final fixup of bs_start_match2/5,bs_save2/bs_restore2 instructions for diff --git a/lib/compiler/src/beam_dead.erl b/lib/compiler/src/beam_dead.erl index ead88b57e9..11129c39bc 100644 --- a/lib/compiler/src/beam_dead.erl +++ b/lib/compiler/src/beam_dead.erl @@ -239,11 +239,26 @@ backward([{test,is_eq_exact,Fail,[Dst,{integer,Arity}]}=I| backward([{label,Lbl}=L|Is], D, Acc) -> backward(Is, beam_utils:index_label(Lbl, Acc, D), [L|Acc]); backward([{select,select_val,Reg,{f,Fail0},List0}|Is], D, Acc) -> - List = shortcut_select_list(List0, Reg, D, []), + List1 = shortcut_select_list(List0, Reg, D, []), Fail1 = shortcut_label(Fail0, D), Fail = shortcut_bs_test(Fail1, Is, D), - Sel = {select,select_val,Reg,{f,Fail},List}, - backward(Is, D, [Sel|Acc]); + List = prune_redundant(List1, Fail), + case List of + [] -> + Jump = {jump,{f,Fail}}, + backward([Jump|Is], D, Acc); + [V,F] -> + Test = {test,is_eq_exact,{f,Fail},[Reg,V]}, + Jump = {jump,F}, + backward([Jump,Test|Is], D, Acc); + [{atom,B1},F,{atom,B2},F] when B1 =:= not B2 -> + Test = {test,is_boolean,{f,Fail},[Reg]}, + Jump = {jump,F}, + backward([Jump,Test|Is], D, Acc); + [_|_] -> + Sel = {select,select_val,Reg,{f,Fail},List}, + backward(Is, D, [Sel|Acc]) + end; backward([{jump,{f,To0}},{move,Src,Reg}=Move|Is], D, Acc) -> To = shortcut_select_label(To0, Reg, Src, D), Jump = {jump,{f,To}}, @@ -257,14 +272,17 @@ backward([{jump,{f,To}}=J|[{bif,Op,_,Ops,Reg}|Is]=Is0], D, Acc) -> catch throw:not_possible -> backward(Is0, D, [J|Acc]) end; -backward([{test,bs_start_match2,F,_,[R,_],Ctxt}=I|Is], D, +backward([{test,bs_start_match2,F,Live,[R,_]=Args,Ctxt}|Is], D, [{test,bs_match_string,F,[Ctxt,Bs]}, {test,bs_test_tail2,F,[Ctxt,0]}|Acc0]=Acc) -> + {f,To0} = F, + To = shortcut_bs_start_match(To0, R, D), case beam_utils:is_killed(Ctxt, Acc0, D) of true -> - Eq = {test,is_eq_exact,F,[R,{literal,Bs}]}, + Eq = {test,is_eq_exact,{f,To},[R,{literal,Bs}]}, backward(Is, D, [Eq|Acc0]); false -> + I = {test,bs_start_match2,{f,To},Live,Args,Ctxt}, backward(Is, D, [I|Acc]) end; backward([{test,bs_start_match2,{f,To0},Live,[Src|_]=Info,Dst}|Is], D, Acc) -> @@ -295,7 +313,28 @@ backward([{test,Op,{f,To0},Ops0}|Is], D, Acc) -> is_eq_exact -> combine_eqs(To, Ops0, D, Acc); _ -> {test,Op,{f,To},Ops0} end, - backward(Is, D, [I|Acc]); + case {I,Acc} of + {{test,is_atom,Fail,Ops0},[{test,is_boolean,Fail,Ops0}|_]} -> + %% An is_atom test before an is_boolean test (with the + %% same failure label) is redundant. + backward(Is, D, Acc); + {{test,is_atom,Fail,[R]}, + [{test,is_eq_exact,Fail,[R,{atom,_}]}|_]} -> + %% An is_atom test before a comparison with an atom (with + %% the same failure label) is redundant. + backward(Is, D, Acc); + {{test,is_integer,Fail,[R]}, + [{test,is_eq_exact,Fail,[R,{integer,_}]}|_]} -> + %% An is_integer test before a comparison with an integer + %% (with the same failure label) is redundant. + backward(Is, D, Acc); + {{test,_,_,_},_} -> + %% Still a test instruction. Done. + backward(Is, D, [I|Acc]); + {_,_} -> + %% Rewritten to a select_val. Rescan. + backward([I|Is], D, Acc) + end; backward([{test,Op,{f,To0},Live,Ops0,Dst}|Is], D, Acc) -> To1 = shortcut_bs_test(To0, Is, D), To2 = shortcut_label(To1, D), @@ -348,6 +387,12 @@ shortcut_label(To0, D) -> shortcut_select_label(To, Reg, Lit, D) -> shortcut_rel_op(To, is_ne_exact, [Reg,Lit], D). +prune_redundant([_,{f,Fail}|T], Fail) -> + prune_redundant(T, Fail); +prune_redundant([V,F|T], Fail) -> + [V,F|prune_redundant(T, Fail)]; +prune_redundant([], _) -> []. + %% 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_dict.erl b/lib/compiler/src/beam_dict.erl index 2b5f8c1b7f..654fb47dbd 100644 --- a/lib/compiler/src/beam_dict.erl +++ b/lib/compiler/src/beam_dict.erl @@ -44,7 +44,7 @@ locals = [] :: [{label(), arity(), label()}], imports = gb_trees:empty() :: import_tab(), strings = <<>> :: binary(), %String pool - lambdas = [], %[{...}] + lambdas = {0,[]}, %[{...}] literals = dict:new() :: literal_tab(), fnames = #{} :: fname_tab(), lines = #{} :: line_tab(), @@ -145,15 +145,14 @@ string(Str, Dict) when is_list(Str) -> -spec lambda(label(), non_neg_integer(), bdict()) -> {non_neg_integer(), bdict()}. -lambda(Lbl, NumFree, #asm{lambdas=Lambdas0}=Dict) -> - OldIndex = length(Lambdas0), +lambda(Lbl, NumFree, #asm{lambdas={OldIndex,Lambdas0}}=Dict) -> %% Set Index the same as OldIndex. Index = OldIndex, %% Initialize OldUniq to 0. It will be set to an unique value %% based on the MD5 checksum of the BEAM code for the module. OldUniq = 0, Lambdas = [{Lbl,{OldIndex,Lbl,Index,NumFree,OldUniq}}|Lambdas0], - {OldIndex,Dict#asm{lambdas=Lambdas}}. + {OldIndex,Dict#asm{lambdas={OldIndex+1,Lambdas}}}. %% Returns the index for a literal (adding it to the literal table if necessary). %% literal(Literal, Dict) -> {Index,Dict'} @@ -236,13 +235,13 @@ string_table(#asm{strings=Strings,string_offset=Size}) -> -spec lambda_table(bdict()) -> {non_neg_integer(), [<<_:192>>]}. -lambda_table(#asm{locals=Loc0,lambdas=Lambdas0}) -> +lambda_table(#asm{locals=Loc0,lambdas={NumLambdas,Lambdas0}}) -> Lambdas1 = sofs:relation(Lambdas0), Loc = sofs:relation([{Lbl,{F,A}} || {F,A,Lbl} <- Loc0]), Lambdas2 = sofs:relative_product1(Lambdas1, Loc), Lambdas = [<<F:32,A:32,Lbl:32,Index:32,NumFree:32,OldUniq:32>> || {{_,Lbl,Index,NumFree,OldUniq},{F,A}} <- sofs:to_external(Lambdas2)], - {length(Lambdas),Lambdas}. + {NumLambdas,Lambdas}. %% Returns the literal table. %% literal_table(Dict) -> {NumLiterals, [<<TermSize>>,TermInExternalFormat]} diff --git a/lib/compiler/src/beam_jump.erl b/lib/compiler/src/beam_jump.erl index 5e58e0f6ac..3b6eb19fe8 100644 --- a/lib/compiler/src/beam_jump.erl +++ b/lib/compiler/src/beam_jump.erl @@ -495,7 +495,7 @@ is_label_used_in_block({set,_,_,Info}, Lbl) -> {alloc,_,{gc_bif,_,{f,F}}} -> F =:= Lbl; {alloc,_,{put_map,_,{f,F}}} -> F =:= Lbl; {get_map_elements,{f,F}} -> F =:= Lbl; - {'catch',{f,F}} -> F =:= Lbl; + {try_catch,_,{f,F}} -> F =:= Lbl; {alloc,_,_} -> false; {put_tuple,_} -> false; {get_tuple_element,_} -> false; diff --git a/lib/compiler/src/beam_peep.erl b/lib/compiler/src/beam_peep.erl index 17fd2e502a..0c1abfe6a0 100644 --- a/lib/compiler/src/beam_peep.erl +++ b/lib/compiler/src/beam_peep.erl @@ -65,18 +65,6 @@ function({function,Name,Arity,CLabel,Is0}) -> %% InEncoding =:= latin1, OutEncoding =:= unicode; %% InEncoding =:= latin1, OutEncoding =:= utf8 -> %% -%% (2) A select_val/4 instruction that only verifies that -%% its argument is either 'true' or 'false' can be -%% be replaced with an is_boolean/2 instruction. That is: -%% -%% select_val Reg Fail [ true Next false Next ] -%% Next: ... -%% -%% can be rewritten to -%% -%% is_boolean Fail Reg -%% Next: ... -%% peep(Is) -> peep(Is, gb_sets:empty(), []). @@ -95,12 +83,16 @@ peep([{gc_bif,_,_,_,_,Dst}=I|Is], SeenTests0, Acc) -> %% Kill all remembered tests that depend on the destination register. SeenTests = kill_seen(Dst, SeenTests0), peep(Is, SeenTests, [I|Acc]); -peep([{test,is_boolean,{f,Fail},Ops}|_]=Is, SeenTests, - [{test,is_atom,{f,Fail},Ops}|Acc]) -> - %% The previous is_atom/2 test (with the same failure label) is redundant. - %% (If is_boolean(Src) is true, is_atom(Src) is also true, so it is - %% OK to still remember that we have seen is_atom/1.) - peep(Is, SeenTests, Acc); +peep([{select,Op,R,F,Vls0}|Is], _, Acc) -> + case prune_redundant_values(Vls0, F) of + [] -> + %% No values left. Must convert to plain jump. + I = {jump,F}, + peep(Is, gb_sets:empty(), [I|Acc]); + [_|_]=Vls -> + I = {select,Op,R,F,Vls}, + peep(Is, gb_sets:empty(), [I|Acc]) + end; peep([{test,Op,_,Ops}=I|Is], SeenTests0, Acc) -> case beam_utils:is_pure_test(I) of false -> @@ -121,16 +113,6 @@ peep([{test,Op,_,Ops}=I|Is], SeenTests0, Acc) -> peep(Is, SeenTests, [I|Acc]) end end; -peep([{select,select_val,Src,Fail, - [{atom,false},{f,L},{atom,true},{f,L}]}| - [{label,L}|_]=Is], SeenTests, Acc) -> - I = {test,is_boolean,Fail,[Src]}, - peep([I|Is], SeenTests, Acc); -peep([{select,select_val,Src,Fail, - [{atom,true},{f,L},{atom,false},{f,L}]}| - [{label,L}|_]=Is], SeenTests, Acc) -> - I = {test,is_boolean,Fail,[Src]}, - peep([I|Is], SeenTests, Acc); peep([I|Is], _, Acc) -> %% An unknown instruction. Throw away all information we %% have collected about test instructions. @@ -155,3 +137,9 @@ kill_seen_1([{_,Ops}=Test|T], Dst) -> false -> [Test|kill_seen_1(T, Dst)] end; kill_seen_1([], _) -> []. + +prune_redundant_values([_Val,F|Vls], F) -> + prune_redundant_values(Vls, F); +prune_redundant_values([Val,Lbl|Vls], F) -> + [Val,Lbl|prune_redundant_values(Vls, F)]; +prune_redundant_values([], _) -> []. diff --git a/lib/compiler/src/beam_reorder.erl b/lib/compiler/src/beam_reorder.erl new file mode 100644 index 0000000000..41586a7bf2 --- /dev/null +++ b/lib/compiler/src/beam_reorder.erl @@ -0,0 +1,139 @@ +%% +%% %CopyrightBegin% +%% +%% Copyright Ericsson AB 1999-2013. All Rights Reserved. +%% +%% Licensed under the Apache License, Version 2.0 (the "License"); +%% you may not use this file except in compliance with the License. +%% You may obtain a copy of the License at +%% +%% http://www.apache.org/licenses/LICENSE-2.0 +%% +%% Unless required by applicable law or agreed to in writing, software +%% distributed under the License is distributed on an "AS IS" BASIS, +%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +%% See the License for the specific language governing permissions and +%% limitations under the License. +%% +%% %CopyrightEnd% +%% + +-module(beam_reorder). + +-export([module/2]). +-import(lists, [member/2,reverse/1]). + +module({Mod,Exp,Attr,Fs0,Lc}, _Opt) -> + Fs = [function(F) || F <- Fs0], + {ok,{Mod,Exp,Attr,Fs,Lc}}. + +function({function,Name,Arity,CLabel,Is0}) -> + try + Is = reorder(Is0), + {function,Name,Arity,CLabel,Is} + catch + Class:Error -> + Stack = erlang:get_stacktrace(), + io:fwrite("Function: ~w/~w\n", [Name,Arity]), + erlang:raise(Class, Error, Stack) + end. + +%% reorder(Instructions0) -> Instructions +%% Reorder instructions before the beam_block pass, because reordering +%% will be more cumbersome when the blocks are in place. +%% +%% Execution of get_tuple_element instructions can be delayed until +%% they are actually needed. Consider the sequence: +%% +%% get_tuple_element Tuple Pos Dst +%% test Test Fail Operands +%% +%% If Dst is killed at label Fail (and not referenced in Operands), +%% we can can swap the instructions: +%% +%% test Test Fail Operands +%% get_tuple_element Tuple Pos Dst +%% +%% That can be beneficial in two ways: Firstly, if the branch is taken +%% we have avoided execution of the get_tuple_element instruction. +%% Secondly, even if the branch is not taken, subsequent optimization +%% (opt_blocks/1) may be able to change Dst to the final destination +%% register and eliminate a 'move' instruction. + +reorder(Is) -> + D = beam_utils:index_labels(Is), + reorder_1(Is, D, []). + +reorder_1([{Op,_,_}=TryCatch|[I|Is]=Is0], D, Acc) + when Op =:= 'catch'; Op =:= 'try' -> + %% Don't allow 'try' or 'catch' instructions to split blocks if + %% it can be avoided. + case is_safe(I) of + false -> + reorder_1(Is0, D, [TryCatch|Acc]); + true -> + reorder_1([TryCatch|Is], D, [I|Acc]) + end; +reorder_1([{label,L}=I|_], D, Acc) -> + Is = beam_utils:code_at(L, D), + reorder_1(Is, D, [I|Acc]); +reorder_1([{test,is_nonempty_list,_,_}=I|Is], D, Acc) -> + %% The run-time system may combine the is_nonempty_list test with + %% the following get_list instruction. + reorder_1(Is, D, [I|Acc]); +reorder_1([{test,_,_,_}=I, + {select,_,_,_,_}=S|Is], D, Acc) -> + %% There is nothing to gain by inserting a get_tuple_element + %% instruction between the test instruction and the select + %% instruction. + reorder_1(Is, D, [S,I|Acc]); +reorder_1([{test,_,{f,L},Ss}=I|Is0], D0, + [{get_tuple_element,_,_,El}=G|Acc0]=Acc) -> + case member(El, Ss) of + true -> + reorder_1(Is0, D0, [I|Acc]); + false -> + case beam_utils:is_killed_at(El, L, D0) of + true -> + Is = [I,G|Is0], + reorder_1(Is, D0, Acc0); + false -> + case beam_utils:is_killed(El, Is0, D0) of + true -> + Code0 = beam_utils:code_at(L, D0), + Code = [G|Code0], + D = beam_utils:index_label(L, Code, D0), + Is = [I|Is0], + reorder_1(Is, D, Acc0); + false -> + reorder_1(Is0, D0, [I|Acc]) + end + end + end; +reorder_1([{allocate_zero,N,Live}=I0|Is], D, + [{get_tuple_element,{x,Tup},_,{x,Dst}}=G|Acc]=Acc0) -> + case Tup < Dst andalso Dst+1 =:= Live of + true -> + %% Move allocation instruction upwards past + %% get_tuple_element instructions to create more + %% opportunities for moving get_tuple_element + %% instructions. + I = {allocate_zero,N,Dst}, + reorder_1([I,G|Is], D, Acc); + false -> + reorder_1(Is, D, [I0|Acc0]) + end; +reorder_1([I|Is], D, Acc) -> + reorder_1(Is, D, [I|Acc]); +reorder_1([], _, Acc) -> reverse(Acc). + +%% is_safe(Instruction) -> true|false +%% Test whether an instruction is safe (cannot cause an exception). + +is_safe({kill,_}) -> true; +is_safe({move,_,_}) -> true; +is_safe({put,_}) -> true; +is_safe({put_list,_,_,_}) -> true; +is_safe({put_tuple,_,_}) -> true; +is_safe({test_heap,_,_}) -> true; +is_safe(_) -> false. diff --git a/lib/compiler/src/beam_split.erl b/lib/compiler/src/beam_split.erl index 3be9311080..bb1c0e23a9 100644 --- a/lib/compiler/src/beam_split.erl +++ b/lib/compiler/src/beam_split.erl @@ -57,8 +57,8 @@ split_block([{set,[D],[S|Puts],{alloc,R,{put_map,Op,{f,Lbl}=Fail}}}|Is], split_block([{set,Ds,[S|Ss],{get_map_elements,Fail}}|Is], Bl, Acc) -> Gets = beam_utils:join_even(Ss,Ds), split_block(Is, [], [{get_map_elements,Fail,S,{list,Gets}}|make_block(Bl, Acc)]); -split_block([{set,[R],[],{'catch',L}}|Is], Bl, Acc) -> - split_block(Is, [], [{'catch',R,L}|make_block(Bl, Acc)]); +split_block([{set,[R],[],{try_catch,Op,L}}|Is], Bl, Acc) -> + split_block(Is, [], [{Op,R,L}|make_block(Bl, Acc)]); split_block([{set,[],[],{line,_}=Line}|Is], Bl, Acc) -> split_block(Is, [], [Line|make_block(Bl, Acc)]); split_block([I|Is], Bl, Acc) -> diff --git a/lib/compiler/src/beam_type.erl b/lib/compiler/src/beam_type.erl index 5298589f83..4b45c28623 100644 --- a/lib/compiler/src/beam_type.erl +++ b/lib/compiler/src/beam_type.erl @@ -23,7 +23,8 @@ -export([module/2]). --import(lists, [foldl/3,reverse/1,filter/2]). +-import(lists, [filter/2,foldl/3,keyfind/3,member/2, + reverse/1,reverse/2,sort/1]). module({Mod,Exp,Attr,Fs0,Lc}, _Opts) -> Fs = [function(F) || F <- Fs0], @@ -92,8 +93,19 @@ simplify_basic_1([{set,[D],[TupleReg],{get_tuple_element,0}}=I|Is0], Ts0, Acc) - Ts = update(I, Ts0), simplify_basic_1(Is0, Ts, [I|Acc]) end; -simplify_basic_1([{set,_,_,{'catch',_}}=I|Is], _Ts, Acc) -> +simplify_basic_1([{set,_,_,{try_catch,_,_}}=I|Is], _Ts, Acc) -> simplify_basic_1(Is, tdb_new(), [I|Acc]); +simplify_basic_1([{test,is_atom,_,[R]}=I|Is], Ts, Acc) -> + case tdb_find(R, Ts) of + boolean -> simplify_basic_1(Is, Ts, Acc); + _ -> simplify_basic_1(Is, Ts, [I|Acc]) + end; +simplify_basic_1([{test,is_integer,_,[R]}=I|Is], Ts, Acc) -> + case tdb_find(R, Ts) of + integer -> simplify_basic_1(Is, Ts, Acc); + {integer,_} -> simplify_basic_1(Is, Ts, Acc); + _ -> simplify_basic_1(Is, Ts, [I|Acc]) + end; simplify_basic_1([{test,is_tuple,_,[R]}=I|Is], Ts, Acc) -> case tdb_find(R, Ts) of {tuple,_,_} -> simplify_basic_1(Is, Ts, Acc); @@ -137,6 +149,16 @@ simplify_basic_1([{test,is_record,_,[R,{atom,_}=Tag,{integer,Arity}]}=I|Is], Ts0 Ts = update(I, Ts0), simplify_basic_1(Is, Ts, [I|Acc]) end; +simplify_basic_1([{select,select_val,Reg,_,_}=I0|Is], Ts, Acc) -> + I = case tdb_find(Reg, Ts) of + {integer,Range} -> + simplify_select_val_int(I0, Range); + boolean -> + simplify_select_val_bool(I0); + _ -> + I0 + end, + simplify_basic_1(Is, tdb_new(), [I|Acc]); simplify_basic_1([I|Is], Ts0, Acc) -> Ts = update(I, Ts0), simplify_basic_1(Is, Ts, [I|Acc]); @@ -144,6 +166,32 @@ simplify_basic_1([], Ts, Acc) -> Is = reverse(Acc), {Is,Ts}. +simplify_select_val_int({select,select_val,R,_,L0}=I, {Min,Max}) -> + Vs = sort([V || {integer,V} <- L0]), + case eq_ranges(Vs, Min, Max) of + false -> I; + true -> simplify_select_val_1(L0, {integer,Max}, R, []) + end. + +simplify_select_val_bool({select,select_val,R,_,L}=I) -> + Vs = sort([V || {atom,V} <- L]), + case Vs of + [false,true] -> + simplify_select_val_1(L, {atom,false}, R, []); + _ -> + I + end. + +simplify_select_val_1([Val,F|T], Val, R, Acc) -> + L = reverse(Acc, T), + {select,select_val,R,F,L}; +simplify_select_val_1([V,F|T], Val, R, Acc) -> + simplify_select_val_1(T, Val, R, [F,V|Acc]). + +eq_ranges([H], H, H) -> true; +eq_ranges([H|T], H, Max) -> eq_ranges(T, H+1, Max); +eq_ranges(_, _, _) -> false. + %% simplify_float([Instruction], TypeDatabase) -> %% {[Instruction],TypeDatabase'} | not_possible %% Simplify floating point operations in blocks. @@ -199,7 +247,7 @@ simplify_float_1([{set,[D0],[A0,B0],{alloc,_,{gc_bif,Op0,{f,0}}}}=I|Is]=Is0, Ts = tdb_update([{D0,float}], Ts0), simplify_float_1(Is, Ts, Rs, Acc) end; -simplify_float_1([{set,_,_,{'catch',_}}=I|Is]=Is0, _Ts, Rs0, Acc0) -> +simplify_float_1([{set,_,_,{try_catch,_,_}}=I|Is]=Is0, _Ts, Rs0, Acc0) -> Acc = flush_all(Rs0, Is0, Acc0), simplify_float_1(Is, tdb_new(), Rs0, [I|Acc]); simplify_float_1([{set,_,_,{line,_}}=I|Is], Ts, Rs, Acc) -> @@ -311,7 +359,7 @@ flt_need_heap_2({set,_,_,{get_tuple_element,_}}, H, Fl) -> {[],H,Fl}; flt_need_heap_2({set,_,_,get_list}, H, Fl) -> {[],H,Fl}; -flt_need_heap_2({set,_,_,{'catch',_}}, H, Fl) -> +flt_need_heap_2({set,_,_,{try_catch,_,_}}, H, Fl) -> {[],H,Fl}; %% All other instructions should cause the insertion of an allocation %% instruction if needed. @@ -382,6 +430,17 @@ update({set,[D],[{integer,I},Reg],{bif,element,_}}, Ts0) -> tdb_update([{Reg,{tuple,I,[]}},{D,kill}], Ts0); update({set,[D],[_Index,Reg],{bif,element,_}}, Ts0) -> tdb_update([{Reg,{tuple,0,[]}},{D,kill}], Ts0); +update({set,[D],Args,{bif,N,_}}, Ts0) -> + Ar = length(Args), + BoolOp = erl_internal:new_type_test(N, Ar) orelse + erl_internal:comp_op(N, Ar) orelse + erl_internal:bool_op(N, Ar), + case BoolOp of + true -> + tdb_update([{D,boolean}], Ts0); + false -> + tdb_update([{D,kill}], Ts0) + end; update({set,[D],[S],{get_tuple_element,0}}, Ts) -> tdb_update([{D,{tuple_element,S,0}}], Ts); update({set,[D],[S],{alloc,_,{gc_bif,float,{f,0}}}}, Ts0) -> @@ -390,6 +449,13 @@ update({set,[D],[S],{alloc,_,{gc_bif,float,{f,0}}}}, Ts0) -> true -> tdb_update([{D,float}], Ts0); false -> Ts0 end; +update({set,[D],[S1,S2],{alloc,_,{gc_bif,'band',{f,0}}}}, Ts) -> + case keyfind(integer, 1, [S1,S2]) of + {integer,N} -> + update_band(N, D, Ts); + false -> + tdb_update([{D,integer}], Ts) + end; update({set,[D],[S1,S2],{alloc,_,{gc_bif,'/',{f,0}}}}, Ts0) -> %% Make sure we reject non-numeric literals. case possibly_numeric(S1) andalso possibly_numeric(S2) of @@ -397,15 +463,17 @@ update({set,[D],[S1,S2],{alloc,_,{gc_bif,'/',{f,0}}}}, Ts0) -> false -> Ts0 end; update({set,[D],[S1,S2],{alloc,_,{gc_bif,Op,{f,0}}}}, Ts0) -> - case arith_op(Op) of - no -> - tdb_update([{D,kill}], Ts0); - {yes,_} -> + case op_type(Op) of + integer -> + tdb_update([{D,integer}], Ts0); + {float,_} -> case {tdb_find(S1, Ts0),tdb_find(S2, Ts0)} of {float,_} -> tdb_update([{D,float}], Ts0); {_,float} -> tdb_update([{D,float}], Ts0); {_,_} -> tdb_update([{D,kill}], Ts0) - end + end; + unknown -> + tdb_update([{D,kill}], Ts0) end; update({set,[],_Src,_Op}, Ts0) -> Ts0; update({set,[D],_Src,_Op}, Ts0) -> @@ -437,6 +505,8 @@ update({test,is_record,_Fail,[Src,Tag,{integer,Arity}]}, Ts) -> tdb_update([{Src,{tuple,Arity,[Tag]}}], Ts); update({test,_Test,_Fail,_Other}, Ts) -> Ts; +update({test,bs_get_integer2,_,_,Args,Dst}, Ts) -> + tdb_update([{Dst,get_bs_integer_type(Args)}], Ts); update({call_ext,Ar,{extfunc,math,Math,Ar}}, Ts) -> case is_math_bif(Math, Ar) of true -> tdb_update([{{x,0},float}], Ts); @@ -453,10 +523,43 @@ update({call,_Arity,_Func}, Ts) -> tdb_kill_xregs(Ts); update({call_ext,_Arity,_Func}, Ts) -> tdb_kill_xregs(Ts); update({make_fun2,_,_,_,_}, Ts) -> tdb_kill_xregs(Ts); update({line,_}, Ts) -> Ts; +update({bs_save2,_,_}, Ts) -> Ts; +update({bs_restore2,_,_}, Ts) -> Ts; %% The instruction is unknown. Kill all information. update(_I, _Ts) -> tdb_new(). +update_band(N, Reg, Ts) -> + Type = update_band_1(N, 0), + tdb_update([{Reg,Type}], Ts). + +update_band_1(N, Bits) when Bits < 64 -> + case 1 bsl Bits of + P when P =:= N + 1 -> + {integer,{0,N}}; + P when P > N + 1 -> + integer; + _ -> + update_band_1(N, Bits+1) + end; +update_band_1(_, _) -> + %% Negative or large positive number. Give up. + integer. + +get_bs_integer_type([_,{integer,N},U,{field_flags,Fl}]) + when N*U < 64 -> + NumBits = N*U, + case member(unsigned, Fl) of + true -> + {integer,{0,(1 bsl NumBits)-1}}; + false -> + %% Signed integer. Don't bother. + integer + end; +get_bs_integer_type(_) -> + %% Avoid creating ranges with a huge upper limit. + integer. + is_math_bif(cos, 1) -> true; is_math_bif(cosh, 1) -> true; is_math_bif(sin, 1) -> true; @@ -545,11 +648,22 @@ load_reg(V, Ts, Rs0, Is0) -> {Rs,Is} end. -arith_op('+') -> {yes,fadd}; -arith_op('-') -> {yes,fsub}; -arith_op('*') -> {yes,fmul}; -arith_op('/') -> {yes,fdiv}; -arith_op(_) -> no. +arith_op(Op) -> + case op_type(Op) of + {float,Instr} -> {yes,Instr}; + _ -> no + end. + +op_type('+') -> {float,fadd}; +op_type('-') -> {float,fsub}; +op_type('*') -> {float,fmul}; +%% '/' and 'band' are specially handled. +op_type('bor') -> integer; +op_type('bxor') -> integer; +op_type('bsl') -> integer; +op_type('bsr') -> integer; +op_type('div') -> integer; +op_type(_) -> unknown. flush(Rs, [{set,[_],[],{put_tuple,_}}|_]=Is0, Acc0) -> Acc = flush_all(Rs, Is0, Acc0), @@ -618,7 +732,6 @@ checkerror(Is) -> checkerror_1(Is, Is). checkerror_1([{set,[],[],fcheckerror}|_], OrigIs) -> OrigIs; -checkerror_1([{set,[],[],fclearerror}|_], OrigIs) -> OrigIs; checkerror_1([{set,_,_,{bif,fadd,_}}|_], OrigIs) -> checkerror_2(OrigIs); checkerror_1([{set,_,_,{bif,fsub,_}}|_], OrigIs) -> checkerror_2(OrigIs); checkerror_1([{set,_,_,{bif,fmul,_}}|_], OrigIs) -> checkerror_2(OrigIs); @@ -640,6 +753,9 @@ checkerror_2(OrigIs) -> [{set,[],[],fcheckerror}|OrigIs]. %%% of the first element). %%% %%% 'float' means that the register contains a float. +%%% +%%% 'integer' or {integer,{Min,Max}} that the register contains an +%%% integer. %% tdb_new() -> EmptyDataBase %% Creates a new, empty type database. @@ -729,10 +845,20 @@ merge_type_info({tuple,Sz1,[]}, {tuple,_Sz2,First}=Tuple2) -> merge_type_info({tuple,Sz1,First}, Tuple2); merge_type_info({tuple,_Sz1,First}=Tuple1, {tuple,Sz2,_}) -> merge_type_info(Tuple1, {tuple,Sz2,First}); +merge_type_info(integer, {integer,_}=Int) -> + Int; +merge_type_info({integer,_}=Int, integer) -> + Int; +merge_type_info({integer,{Min1,Max1}}, {integer,{Min2,Max2}}) -> + {integer,{max(Min1, Min2),min(Max1, Max2)}}; merge_type_info(NewType, _) -> verify_type(NewType), NewType. +verify_type(boolean) -> ok; +verify_type(integer) -> ok; +verify_type({integer,{Min,Max}}) + when is_integer(Min), is_integer(Max) -> ok; verify_type(map) -> ok; verify_type(nonempty_list) -> ok; verify_type({tuple,Sz,[]}) when is_integer(Sz) -> ok; diff --git a/lib/compiler/src/beam_utils.erl b/lib/compiler/src/beam_utils.erl index fbcd5de1bb..68d6105cfa 100644 --- a/lib/compiler/src/beam_utils.erl +++ b/lib/compiler/src/beam_utils.erl @@ -484,6 +484,15 @@ check_liveness(R, [{get_map_elements,{f,Fail},S,{list,L}}|Is], St0) -> Other end end; +check_liveness(R, [{test_heap,N,Live}|Is], St) -> + I = {block,[{set,[],[],{alloc,Live,{nozero,nostack,N,[]}}}]}, + check_liveness(R, [I|Is], St); +check_liveness(R, [{allocate_zero,N,Live}|Is], St) -> + I = {block,[{set,[],[],{alloc,Live,{zero,N,0,[]}}}]}, + check_liveness(R, [I|Is], St); +check_liveness(R, [{get_list,S,D1,D2}|Is], St) -> + I = {block,[{set,[D1,D2],[S],get_list}]}, + check_liveness(R, [I|Is], St); check_liveness(_R, Is, St) when is_list(Is) -> %% case Is of %% [I|_] -> diff --git a/lib/compiler/src/beam_validator.erl b/lib/compiler/src/beam_validator.erl index 6004f1974e..fd38fc0095 100644 --- a/lib/compiler/src/beam_validator.erl +++ b/lib/compiler/src/beam_validator.erl @@ -31,15 +31,6 @@ -import(lists, [reverse/1,foldl/3,foreach/2,dropwhile/2]). --define(MAXREG, 1024). - -%%-define(DEBUG, 1). --ifdef(DEBUG). --define(DBG_FORMAT(F, D), (io:format((F), (D)))). --else. --define(DBG_FORMAT(F, D), ok). --endif. - %% To be called by the compiler. module({Mod,Exp,Attr,Fs,Lc}=Code, _Opts) when is_atom(Mod), is_list(Exp), is_list(Attr), is_integer(Lc) -> @@ -170,29 +161,18 @@ validate_0(Module, [{function,Name,Ar,Entry,Code}|Fs], Ft) -> % in the module (those that start with bs_start_match2). }). --ifdef(DEBUG). -print_st(#st{x=Xs,y=Ys,numy=NumY,h=H,ct=Ct}) -> - io:format(" #st{x=~p~n" - " y=~p~n" - " numy=~p,h=~p,ct=~w~n", - [gb_trees:to_list(Xs),gb_trees:to_list(Ys),NumY,H,Ct]). --endif. - validate_1(Is, Name, Arity, Entry, Ft) -> validate_2(labels(Is), Name, Arity, Entry, Ft). validate_2({Ls1,[{func_info,{atom,Mod},{atom,Name},Arity}=_F|Is]}, Name, Arity, Entry, Ft) -> - lists:foreach(fun (_L) -> ?DBG_FORMAT(" ~p.~n", [{label,_L}]) end, Ls1), - ?DBG_FORMAT(" ~p.~n", [_F]), validate_3(labels(Is), Name, Arity, Entry, Mod, Ls1, Ft); validate_2({Ls1,Is}, Name, Arity, _Entry, _Ft) -> error({{'_',Name,Arity},{first(Is),length(Ls1),illegal_instruction}}). validate_3({Ls2,Is}, Name, Arity, Entry, Mod, Ls1, Ft) -> - lists:foreach(fun (_L) -> ?DBG_FORMAT(" ~p.~n", [{label,_L}]) end, Ls2), Offset = 1 + length(Ls1) + 1 + length(Ls2), - EntryOK = (Entry =:= undefined) orelse lists:member(Entry, Ls2), + EntryOK = lists:member(Entry, Ls2), if EntryOK -> St = init_state(Arity), @@ -260,7 +240,6 @@ valfun([], MFA, _Offset, #vst{branched=Targets0,labels=Labels0}=Vst) -> error({MFA,Error}) end; valfun([I|Is], MFA, Offset, Vst0) -> - ?DBG_FORMAT(" ~p.\n", [I]), valfun(Is, MFA, Offset+1, try Vst = val_dsetel(I, Vst0), @@ -278,7 +257,6 @@ valfun_1({label,Lbl}, #vst{current=St0,branched=B,labels=Lbls}=Vst) -> valfun_1(_I, #vst{current=none}=Vst) -> %% Ignore instructions after erlang:error/1,2, which %% the original R10B compiler thought would return. - ?DBG_FORMAT("Ignoring ~p\n", [_I]), Vst; valfun_1({badmatch,Src}, Vst) -> assert_term(Src, Vst), @@ -980,9 +958,9 @@ get_fls(#vst{current=#st{fls=Fls}}) when is_atom(Fls) -> Fls. init_fregs() -> 0. -set_freg({fr,Fr}, #vst{current=#st{f=Fregs0}=St}=Vst) +set_freg({fr,Fr}=Freg, #vst{current=#st{f=Fregs0}=St}=Vst) when is_integer(Fr), 0 =< Fr -> - limit_check(Fr), + check_limit(Freg), Bit = 1 bsl Fr, if Fregs0 band Bit =:= 0 -> @@ -995,9 +973,10 @@ set_freg(Fr, _) -> error({bad_target,Fr}). assert_freg_set({fr,Fr}=Freg, #vst{current=#st{f=Fregs}}) when is_integer(Fr), 0 =< Fr -> if - Fregs band (1 bsl Fr) =/= 0 -> - limit_check(Fr); - true -> error({uninitialized_reg,Freg}) + (Fregs bsr Fr) band 1 =:= 0 -> + error({uninitialized_reg,Freg}); + true -> + ok end; assert_freg_set(Fr, _) -> error({bad_source,Fr}). @@ -1076,16 +1055,16 @@ set_type(Type, {x,_}=Reg, Vst) -> set_type_reg(Type, Reg, Vst); set_type(Type, {y,_}=Reg, Vst) -> set_type_y(Type, Reg, Vst); set_type(_, _, #vst{}=Vst) -> Vst. -set_type_reg(Type, {x,X}, #vst{current=#st{x=Xs}=St}=Vst) +set_type_reg(Type, {x,X}=Reg, #vst{current=#st{x=Xs}=St}=Vst) when is_integer(X), 0 =< X -> - limit_check(X), + check_limit(Reg), Vst#vst{current=St#st{x=gb_trees:enter(X, Type, Xs)}}; set_type_reg(Type, Reg, Vst) -> set_type_y(Type, Reg, Vst). set_type_y(Type, {y,Y}=Reg, #vst{current=#st{y=Ys0}=St}=Vst) when is_integer(Y), 0 =< Y -> - limit_check(Y), + check_limit(Reg), Ys = case gb_trees:lookup(Y, Ys0) of none -> error({invalid_store,Reg,Type}); @@ -1612,17 +1591,19 @@ return_type_math(pow, 2) -> {float,[]}; return_type_math(pi, 0) -> {float,[]}; return_type_math(F, A) when is_atom(F), is_integer(A), A >= 0 -> term. -limit_check(Num) when is_integer(Num), Num >= ?MAXREG -> - error(limit); -limit_check(_) -> ok. +check_limit({x,X}) when is_integer(X), X < 1023 -> + %% Note: x(1023) is reserved for use by the BEAM loader. + ok; +check_limit({y,Y}) when is_integer(Y), Y < 1024 -> + ok; +check_limit({fr,Fr}) when is_integer(Fr), Fr < 1024 -> + ok; +check_limit(_) -> + error(limit). min(A, B) when is_integer(A), is_integer(B), A < B -> A; min(A, B) when is_integer(A), is_integer(B) -> B. gb_trees_from_list(L) -> gb_trees:from_orddict(lists:sort(L)). --ifdef(DEBUG). -error(Error) -> exit(Error). --else. error(Error) -> throw(Error). --endif. diff --git a/lib/compiler/src/cerl_trees.erl b/lib/compiler/src/cerl_trees.erl index 58bb18e34a..b86be95cab 100644 --- a/lib/compiler/src/cerl_trees.erl +++ b/lib/compiler/src/cerl_trees.erl @@ -27,7 +27,7 @@ -module(cerl_trees). -export([depth/1, fold/3, free_variables/1, get_label/1, label/1, label/2, - map/2, mapfold/3, size/1, variables/1]). + map/2, mapfold/3, mapfold/4, size/1, variables/1]). -import(cerl, [alias_pat/1, alias_var/1, ann_c_alias/3, ann_c_apply/3, ann_c_binary/2, ann_c_bitstr/6, ann_c_call/4, @@ -340,136 +340,162 @@ fold_pairs(_, S, []) -> %% starting with the given value <code>Initial</code>, while doing a %% post-order traversal of the tree, much like <code>fold/3</code>. %% +%% This is the same as mapfold/4, with an identity function as the +%% pre-operation. +%% %% @see map/2 %% @see fold/3 +%% @see mapfold/4 -spec mapfold(fun((cerl:cerl(), term()) -> {cerl:cerl(), term()}), term(), cerl:cerl()) -> {cerl:cerl(), term()}. mapfold(F, S0, T) -> + mapfold(fun(T0, A) -> {T0, A} end, F, S0, T). + + +%% @spec mapfold(Pre, Post, Initial::term(), Tree::cerl()) -> +%% {cerl(), term()} +%% +%% Pre = Post = (cerl(), term()) -> {cerl(), term()} +%% +%% @doc Does a combined map/fold operation on the nodes of the +%% tree. It begins by calling <code>Pre</code> on the tree, using the +%% <code>Initial</code> value. It then deconstructs the top node of +%% the returned tree and recurses on the children, using the returned +%% value as the new initial and carrying the returned values from one +%% call to the next. Finally it reassembles the top node from the +%% children, calls <code>Post</code> on it and returns the result. + +-spec mapfold(fun((cerl:cerl(), term()) -> {cerl:cerl(), term()}), + fun((cerl:cerl(), term()) -> {cerl:cerl(), term()}), + term(), cerl:cerl()) -> {cerl:cerl(), term()}. + +mapfold(Pre, Post, S00, T0) -> + {T, S0} = Pre(T0, S00), case type(T) of literal -> case concrete(T) of [_ | _] -> - {T1, S1} = mapfold(F, S0, cons_hd(T)), - {T2, S2} = mapfold(F, S1, cons_tl(T)), - F(update_c_cons(T, T1, T2), S2); + {T1, S1} = mapfold(Pre, Post, S0, cons_hd(T)), + {T2, S2} = mapfold(Pre, Post, S1, cons_tl(T)), + Post(update_c_cons(T, T1, T2), S2); V when tuple_size(V) > 0 -> - {Ts, S1} = mapfold_list(F, S0, tuple_es(T)), - F(update_c_tuple(T, Ts), S1); + {Ts, S1} = mapfold_list(Pre, Post, S0, tuple_es(T)), + Post(update_c_tuple(T, Ts), S1); _ -> - F(T, S0) + Post(T, S0) end; var -> - F(T, S0); + Post(T, S0); values -> - {Ts, S1} = mapfold_list(F, S0, values_es(T)), - F(update_c_values(T, Ts), S1); + {Ts, S1} = mapfold_list(Pre, Post, S0, values_es(T)), + Post(update_c_values(T, Ts), S1); cons -> - {T1, S1} = mapfold(F, S0, cons_hd(T)), - {T2, S2} = mapfold(F, S1, cons_tl(T)), - F(update_c_cons_skel(T, T1, T2), S2); + {T1, S1} = mapfold(Pre, Post, S0, cons_hd(T)), + {T2, S2} = mapfold(Pre, Post, S1, cons_tl(T)), + Post(update_c_cons_skel(T, T1, T2), S2); tuple -> - {Ts, S1} = mapfold_list(F, S0, tuple_es(T)), - F(update_c_tuple_skel(T, Ts), S1); + {Ts, S1} = mapfold_list(Pre, Post, S0, tuple_es(T)), + Post(update_c_tuple_skel(T, Ts), S1); map -> - {M , S1} = mapfold(F, S0, map_arg(T)), - {Ts, S2} = mapfold_list(F, S1, map_es(T)), - F(update_c_map(T, M, Ts), S2); + {M , S1} = mapfold(Pre, Post, S0, map_arg(T)), + {Ts, S2} = mapfold_list(Pre, Post, S1, map_es(T)), + Post(update_c_map(T, M, Ts), S2); map_pair -> - {Op, S1} = mapfold(F, S0, map_pair_op(T)), - {Key, S2} = mapfold(F, S1, map_pair_key(T)), - {Val, S3} = mapfold(F, S2, map_pair_val(T)), - F(update_c_map_pair(T,Op,Key,Val), S3); + {Op, S1} = mapfold(Pre, Post, S0, map_pair_op(T)), + {Key, S2} = mapfold(Pre, Post, S1, map_pair_key(T)), + {Val, S3} = mapfold(Pre, Post, S2, map_pair_val(T)), + Post(update_c_map_pair(T,Op,Key,Val), S3); 'let' -> - {Vs, S1} = mapfold_list(F, S0, let_vars(T)), - {A, S2} = mapfold(F, S1, let_arg(T)), - {B, S3} = mapfold(F, S2, let_body(T)), - F(update_c_let(T, Vs, A, B), S3); + {Vs, S1} = mapfold_list(Pre, Post, S0, let_vars(T)), + {A, S2} = mapfold(Pre, Post, S1, let_arg(T)), + {B, S3} = mapfold(Pre, Post, S2, let_body(T)), + Post(update_c_let(T, Vs, A, B), S3); seq -> - {A, S1} = mapfold(F, S0, seq_arg(T)), - {B, S2} = mapfold(F, S1, seq_body(T)), - F(update_c_seq(T, A, B), S2); + {A, S1} = mapfold(Pre, Post, S0, seq_arg(T)), + {B, S2} = mapfold(Pre, Post, S1, seq_body(T)), + Post(update_c_seq(T, A, B), S2); apply -> - {E, S1} = mapfold(F, S0, apply_op(T)), - {As, S2} = mapfold_list(F, S1, apply_args(T)), - F(update_c_apply(T, E, As), S2); + {E, S1} = mapfold(Pre, Post, S0, apply_op(T)), + {As, S2} = mapfold_list(Pre, Post, S1, apply_args(T)), + Post(update_c_apply(T, E, As), S2); call -> - {M, S1} = mapfold(F, S0, call_module(T)), - {N, S2} = mapfold(F, S1, call_name(T)), - {As, S3} = mapfold_list(F, S2, call_args(T)), - F(update_c_call(T, M, N, As), S3); + {M, S1} = mapfold(Pre, Post, S0, call_module(T)), + {N, S2} = mapfold(Pre, Post, S1, call_name(T)), + {As, S3} = mapfold_list(Pre, Post, S2, call_args(T)), + Post(update_c_call(T, M, N, As), S3); primop -> - {N, S1} = mapfold(F, S0, primop_name(T)), - {As, S2} = mapfold_list(F, S1, primop_args(T)), - F(update_c_primop(T, N, As), S2); + {N, S1} = mapfold(Pre, Post, S0, primop_name(T)), + {As, S2} = mapfold_list(Pre, Post, S1, primop_args(T)), + Post(update_c_primop(T, N, As), S2); 'case' -> - {A, S1} = mapfold(F, S0, case_arg(T)), - {Cs, S2} = mapfold_list(F, S1, case_clauses(T)), - F(update_c_case(T, A, Cs), S2); + {A, S1} = mapfold(Pre, Post, S0, case_arg(T)), + {Cs, S2} = mapfold_list(Pre, Post, S1, case_clauses(T)), + Post(update_c_case(T, A, Cs), S2); clause -> - {Ps, S1} = mapfold_list(F, S0, clause_pats(T)), - {G, S2} = mapfold(F, S1, clause_guard(T)), - {B, S3} = mapfold(F, S2, clause_body(T)), - F(update_c_clause(T, Ps, G, B), S3); + {Ps, S1} = mapfold_list(Pre, Post, S0, clause_pats(T)), + {G, S2} = mapfold(Pre, Post, S1, clause_guard(T)), + {B, S3} = mapfold(Pre, Post, S2, clause_body(T)), + Post(update_c_clause(T, Ps, G, B), S3); alias -> - {V, S1} = mapfold(F, S0, alias_var(T)), - {P, S2} = mapfold(F, S1, alias_pat(T)), - F(update_c_alias(T, V, P), S2); + {V, S1} = mapfold(Pre, Post, S0, alias_var(T)), + {P, S2} = mapfold(Pre, Post, S1, alias_pat(T)), + Post(update_c_alias(T, V, P), S2); 'fun' -> - {Vs, S1} = mapfold_list(F, S0, fun_vars(T)), - {B, S2} = mapfold(F, S1, fun_body(T)), - F(update_c_fun(T, Vs, B), S2); + {Vs, S1} = mapfold_list(Pre, Post, S0, fun_vars(T)), + {B, S2} = mapfold(Pre, Post, S1, fun_body(T)), + Post(update_c_fun(T, Vs, B), S2); 'receive' -> - {Cs, S1} = mapfold_list(F, S0, receive_clauses(T)), - {E, S2} = mapfold(F, S1, receive_timeout(T)), - {A, S3} = mapfold(F, S2, receive_action(T)), - F(update_c_receive(T, Cs, E, A), S3); + {Cs, S1} = mapfold_list(Pre, Post, S0, receive_clauses(T)), + {E, S2} = mapfold(Pre, Post, S1, receive_timeout(T)), + {A, S3} = mapfold(Pre, Post, S2, receive_action(T)), + Post(update_c_receive(T, Cs, E, A), S3); 'try' -> - {E, S1} = mapfold(F, S0, try_arg(T)), - {Vs, S2} = mapfold_list(F, S1, try_vars(T)), - {B, S3} = mapfold(F, S2, try_body(T)), - {Evs, S4} = mapfold_list(F, S3, try_evars(T)), - {H, S5} = mapfold(F, S4, try_handler(T)), - F(update_c_try(T, E, Vs, B, Evs, H), S5); + {E, S1} = mapfold(Pre, Post, S0, try_arg(T)), + {Vs, S2} = mapfold_list(Pre, Post, S1, try_vars(T)), + {B, S3} = mapfold(Pre, Post, S2, try_body(T)), + {Evs, S4} = mapfold_list(Pre, Post, S3, try_evars(T)), + {H, S5} = mapfold(Pre, Post, S4, try_handler(T)), + Post(update_c_try(T, E, Vs, B, Evs, H), S5); 'catch' -> - {B, S1} = mapfold(F, S0, catch_body(T)), - F(update_c_catch(T, B), S1); + {B, S1} = mapfold(Pre, Post, S0, catch_body(T)), + Post(update_c_catch(T, B), S1); binary -> - {Ds, S1} = mapfold_list(F, S0, binary_segments(T)), - F(update_c_binary(T, Ds), S1); + {Ds, S1} = mapfold_list(Pre, Post, S0, binary_segments(T)), + Post(update_c_binary(T, Ds), S1); bitstr -> - {Val, S1} = mapfold(F, S0, bitstr_val(T)), - {Size, S2} = mapfold(F, S1, bitstr_size(T)), - {Unit, S3} = mapfold(F, S2, bitstr_unit(T)), - {Type, S4} = mapfold(F, S3, bitstr_type(T)), - {Flags, S5} = mapfold(F, S4, bitstr_flags(T)), - F(update_c_bitstr(T, Val, Size, Unit, Type, Flags), S5); + {Val, S1} = mapfold(Pre, Post, S0, bitstr_val(T)), + {Size, S2} = mapfold(Pre, Post, S1, bitstr_size(T)), + {Unit, S3} = mapfold(Pre, Post, S2, bitstr_unit(T)), + {Type, S4} = mapfold(Pre, Post, S3, bitstr_type(T)), + {Flags, S5} = mapfold(Pre, Post, S4, bitstr_flags(T)), + Post(update_c_bitstr(T, Val, Size, Unit, Type, Flags), S5); letrec -> - {Ds, S1} = mapfold_pairs(F, S0, letrec_defs(T)), - {B, S2} = mapfold(F, S1, letrec_body(T)), - F(update_c_letrec(T, Ds, B), S2); + {Ds, S1} = mapfold_pairs(Pre, Post, S0, letrec_defs(T)), + {B, S2} = mapfold(Pre, Post, S1, letrec_body(T)), + Post(update_c_letrec(T, Ds, B), S2); module -> - {N, S1} = mapfold(F, S0, module_name(T)), - {Es, S2} = mapfold_list(F, S1, module_exports(T)), - {As, S3} = mapfold_pairs(F, S2, module_attrs(T)), - {Ds, S4} = mapfold_pairs(F, S3, module_defs(T)), - F(update_c_module(T, N, Es, As, Ds), S4) + {N, S1} = mapfold(Pre, Post, S0, module_name(T)), + {Es, S2} = mapfold_list(Pre, Post, S1, module_exports(T)), + {As, S3} = mapfold_pairs(Pre, Post, S2, module_attrs(T)), + {Ds, S4} = mapfold_pairs(Pre, Post, S3, module_defs(T)), + Post(update_c_module(T, N, Es, As, Ds), S4) end. -mapfold_list(F, S0, [T | Ts]) -> - {T1, S1} = mapfold(F, S0, T), - {Ts1, S2} = mapfold_list(F, S1, Ts), +mapfold_list(Pre, Post, S0, [T | Ts]) -> + {T1, S1} = mapfold(Pre, Post, S0, T), + {Ts1, S2} = mapfold_list(Pre, Post, S1, Ts), {[T1 | Ts1], S2}; -mapfold_list(_, S, []) -> +mapfold_list(_, _, S, []) -> {[], S}. -mapfold_pairs(F, S0, [{T1, T2} | Ps]) -> - {T3, S1} = mapfold(F, S0, T1), - {T4, S2} = mapfold(F, S1, T2), - {Ps1, S3} = mapfold_pairs(F, S2, Ps), +mapfold_pairs(Pre, Post, S0, [{T1, T2} | Ps]) -> + {T3, S1} = mapfold(Pre, Post, S0, T1), + {T4, S2} = mapfold(Pre, Post, S1, T2), + {Ps1, S3} = mapfold_pairs(Pre, Post, S2, Ps), {[{T3, T4} | Ps1], S3}; -mapfold_pairs(_, S, []) -> +mapfold_pairs(_, _, S, []) -> {[], S}. @@ -640,8 +666,8 @@ vars_in_list([], _, A) -> vars_in_defs(Ds, S) -> vars_in_defs(Ds, S, []). -vars_in_defs([{_, F} | Ds], S, A) -> - vars_in_defs(Ds, S, ordsets:union(variables(F, S), A)); +vars_in_defs([{_, Post} | Ds], S, A) -> + vars_in_defs(Ds, S, ordsets:union(variables(Post, S), A)); vars_in_defs([], _, A) -> A. @@ -703,13 +729,14 @@ label(T, N, Env) -> %% Constant literals are not labeled. {T, N}; var -> - case dict:find(var_name(T), Env) of - {ok, L} -> - {As, _} = label_ann(T, L), - N1 = N; - error -> - {As, N1} = label_ann(T, N) - end, + {As, N1} = + case dict:find(var_name(T), Env) of + {ok, L} -> + {A, _} = label_ann(T, L), + {A, N}; + error -> + label_ann(T, N) + end, {set_ann(T, As), N1}; values -> {Ts, N1} = label_list(values_es(T), N, Env), diff --git a/lib/compiler/src/compile.erl b/lib/compiler/src/compile.erl index e0a29fe9b1..46917905de 100644 --- a/lib/compiler/src/compile.erl +++ b/lib/compiler/src/compile.erl @@ -40,6 +40,8 @@ %%---------------------------------------------------------------------- +-type abstract_code() :: [erl_parse:abstract_form()]. + -type option() :: atom() | {atom(), term()} | {'d', atom(), term()}. -type err_info() :: {erl_anno:line() | 'none', @@ -48,6 +50,9 @@ -type warnings() :: [{file:filename(), [err_info()]}]. -type mod_ret() :: {'ok', module()} | {'ok', module(), cerl:c_module()} %% with option 'to_core' + | {'ok', %% with option 'to_pp' + module() | [], %% module() if 'to_exp' + abstract_code()} | {'ok', module(), warnings()}. -type bin_ret() :: {'ok', module(), binary()} | {'ok', module(), binary(), warnings()}. @@ -78,7 +83,11 @@ file(File, Opts) when is_list(Opts) -> file(File, Opt) -> file(File, [Opt|?DEFAULT_OPTIONS]). -forms(File) -> forms(File, ?DEFAULT_OPTIONS). +-spec forms(abstract_code()) -> comp_ret(). + +forms(Forms) -> forms(Forms, ?DEFAULT_OPTIONS). + +-spec forms(abstract_code(), [option()] | option()) -> comp_ret(). forms(Forms, Opts) when is_list(Opts) -> do_compile({forms,Forms}, [binary|Opts++env_default_opts()]); @@ -106,6 +115,8 @@ noenv_file(File, Opts) when is_list(Opts) -> noenv_file(File, Opt) -> noenv_file(File, [Opt|?DEFAULT_OPTIONS]). +-spec noenv_forms(abstract_code(), [option()] | option()) -> comp_ret(). + noenv_forms(Forms, Opts) when is_list(Opts) -> do_compile({forms,Forms}, [binary|Opts]); noenv_forms(Forms, Opt) when is_atom(Opt) -> @@ -671,11 +682,16 @@ asm_passes() -> %% Assembly level optimisations. [{delay, [{pass,beam_a}, + {iff,da,{listing,"a"}}, {unless,no_postopt, - [{pass,beam_block}, + [{unless,no_reorder,{pass,beam_reorder}}, + {iff,dre,{listing,"reorder"}}, + {pass,beam_block}, {iff,dblk,{listing,"block"}}, {unless,no_except,{pass,beam_except}}, {iff,dexcept,{listing,"except"}}, + {unless,no_bs_opt,{pass,beam_bs}}, + {iff,dbs,{listing,"bs"}}, {unless,no_bopt,{pass,beam_bool}}, {iff,dbool,{listing,"bool"}}, {unless,no_topt,{pass,beam_type}}, @@ -703,6 +719,7 @@ asm_passes() -> {iff,no_postopt,[{pass,beam_clean}]}, {pass,beam_z}, + {iff,dz,{listing,"z"}}, {iff,dopt,{listing,"optimize"}}, {iff,'S',{listing,"S"}}, {iff,'to_asm',{done,"S"}}]}, @@ -1300,21 +1317,12 @@ generate_key(String) when is_list(String) -> encrypt({des3_cbc=Type,Key,IVec,BlockSize}, Bin0) -> Bin1 = case byte_size(Bin0) rem BlockSize of 0 -> Bin0; - N -> list_to_binary([Bin0,random_bytes(BlockSize-N)]) + N -> list_to_binary([Bin0,crypto:rand_bytes(BlockSize-N)]) end, Bin = crypto:block_encrypt(Type, Key, IVec, Bin1), TypeString = atom_to_list(Type), list_to_binary([0,length(TypeString),TypeString,Bin]). -random_bytes(N) -> - _ = random:seed(erlang:time_offset(), - erlang:monotonic_time(), - erlang:unique_integer()), - random_bytes_1(N, []). - -random_bytes_1(0, Acc) -> Acc; -random_bytes_1(N, Acc) -> random_bytes_1(N-1, [random:uniform(255)|Acc]). - save_core_code(St) -> {ok,St#compile{core_code=cerl:from_records(St#compile.code)}}. @@ -1612,11 +1620,8 @@ output_encoding(F, #compile{encoding = Encoding}) -> ok = io:setopts(F, [{encoding, Encoding}]), ok = io:fwrite(F, <<"%% ~s\n">>, [epp:encoding_to_string(Encoding)]). -restore_expanded_types("P", Fs) -> - epp:restore_typed_record_fields(Fs); restore_expanded_types("E", {M,I,Fs0}) -> - Fs1 = restore_expand_module(Fs0), - Fs = epp:restore_typed_record_fields(Fs1), + Fs = restore_expand_module(Fs0), {M,I,Fs}; restore_expanded_types(_Ext, Code) -> Code. @@ -1628,6 +1633,8 @@ restore_expand_module([{attribute,Line,spec,[Arg]}|Fs]) -> [{attribute,Line,spec,Arg}|restore_expand_module(Fs)]; restore_expand_module([{attribute,Line,callback,[Arg]}|Fs]) -> [{attribute,Line,callback,Arg}|restore_expand_module(Fs)]; +restore_expand_module([{attribute,Line,record,[R]}|Fs]) -> + [{attribute,Line,record,R}|restore_expand_module(Fs)]; restore_expand_module([F|Fs]) -> [F|restore_expand_module(Fs)]; restore_expand_module([]) -> []. diff --git a/lib/compiler/src/compiler.app.src b/lib/compiler/src/compiler.app.src index afb85f4710..a2b2a1d277 100644 --- a/lib/compiler/src/compiler.app.src +++ b/lib/compiler/src/compiler.app.src @@ -25,6 +25,7 @@ beam_asm, beam_block, beam_bool, + beam_bs, beam_bsm, beam_clean, beam_dead, @@ -37,6 +38,7 @@ beam_opcodes, beam_peep, beam_receive, + beam_reorder, beam_split, beam_trim, beam_type, diff --git a/lib/compiler/src/core_lib.erl b/lib/compiler/src/core_lib.erl index 3abb520485..839c736ff2 100644 --- a/lib/compiler/src/core_lib.erl +++ b/lib/compiler/src/core_lib.erl @@ -21,52 +21,16 @@ -module(core_lib). --deprecated({get_anno,1,next_major_release}). --deprecated({set_anno,2,next_major_release}). --deprecated({is_literal,1,next_major_release}). --deprecated({is_literal_list,1,next_major_release}). --deprecated({literal_value,1,next_major_release}). - --export([get_anno/1,set_anno/2]). --export([is_literal/1,is_literal_list/1]). --export([literal_value/1]). -export([make_values/1]). -export([is_var_used/2]). -include("core_parse.hrl"). -%% -%% Generic get/set annotation that should be used only with cerl() structures. -%% --spec get_anno(cerl:cerl()) -> term(). - -get_anno(C) -> cerl:get_ann(C). - --spec set_anno(cerl:cerl(), term()) -> cerl:cerl(). - -set_anno(C, A) -> cerl:set_ann(C, A). - --spec is_literal(cerl:cerl()) -> boolean(). - -is_literal(Cerl) -> - cerl:is_literal(cerl:fold_literal(Cerl)). - --spec is_literal_list([cerl:cerl()]) -> boolean(). - -is_literal_list(Es) -> lists:all(fun is_literal/1, Es). - -%% Return the value of LitExpr. --spec literal_value(cerl:c_literal() | cerl:c_binary() | - cerl:c_map() | cerl:c_cons() | cerl:c_tuple()) -> term(). - -literal_value(Cerl) -> - cerl:concrete(cerl:fold_literal(Cerl)). - %% Make a suitable values structure, expr or values, depending on Expr. -spec make_values([cerl:cerl()] | cerl:cerl()) -> cerl:cerl(). make_values([E]) -> E; -make_values([H|_]=Es) -> #c_values{anno=get_anno(H),es=Es}; +make_values([H|_]=Es) -> #c_values{anno=cerl:get_ann(H),es=Es}; make_values([]) -> #c_values{es=[]}; make_values(E) -> E. diff --git a/lib/compiler/src/core_lint.erl b/lib/compiler/src/core_lint.erl index cc54f6e411..7d3513c0ba 100644 --- a/lib/compiler/src/core_lint.erl +++ b/lib/compiler/src/core_lint.erl @@ -1,7 +1,7 @@ %% %% %CopyrightBegin% %% -%% Copyright Ericsson AB 1999-2013. All Rights Reserved. +%% Copyright Ericsson AB 1999-2015. All Rights Reserved. %% %% Licensed under the Apache License, Version 2.0 (the "License"); %% you may not use this file except in compliance with the License. @@ -73,7 +73,7 @@ %% Define the lint state record. -record(lint, {module :: module(), % Current module - func :: fa(), % Current function + func :: fa() | 'undefined', % Current function errors = [] :: [error()], % Errors warnings= [] :: [warning()]}). % Warnings diff --git a/lib/compiler/src/rec_env.erl b/lib/compiler/src/rec_env.erl index 0e9e12d1ad..5a4a870769 100644 --- a/lib/compiler/src/rec_env.erl +++ b/lib/compiler/src/rec_env.erl @@ -598,7 +598,16 @@ start_range(Env) -> %% (pseudo-)randomly distributed over the range. generate(_N, Range) -> - random:uniform(Range). % works well + %% We must use the same sequence of random variables to ensure + %% that two compilations of the same source code generates the + %% same BEAM code. + case rand:export_seed() of + undefined -> + rand:seed(exsplus, {1,42,2053}); + _ -> + ok + end, + rand:uniform(Range). % works well %% ===================================================================== diff --git a/lib/compiler/src/sys_core_dsetel.erl b/lib/compiler/src/sys_core_dsetel.erl index ac32db10fe..c6cfdbae7e 100644 --- a/lib/compiler/src/sys_core_dsetel.erl +++ b/lib/compiler/src/sys_core_dsetel.erl @@ -72,7 +72,7 @@ module(M0, _Options) -> {ok,M}. visit_module(#c_module{defs=Ds0}=R) -> - Env = dict:new(), + Env = #{}, Ds = visit_module_1(Ds0, Env, []), R#c_module{defs=Ds}. @@ -95,9 +95,11 @@ visit(Env, #c_var{name={_,_}}=R) -> {R, Env}; visit(Env0, #c_var{name=X}=R) -> %% There should not be any free variables. If there are, - %% the next line will cause an exception. - {ok, N} = dict:find(X, Env0), - {R, dict:store(X, N+1, Env0)}; + %% the case will fail with an exception. + case Env0 of + #{X:=N} -> + {R, Env0#{X:=N+1}} + end; visit(Env, #c_literal{}=R) -> {R, Env}; visit(Env0, #c_tuple{es=Es0}=R) -> @@ -203,7 +205,7 @@ bind_vars(Vs, Env) -> bind_vars(Vs, Env, []). bind_vars([#c_var{name=X}|Vs], Env0, Xs)-> - bind_vars(Vs, dict:store(X, 0, Env0), [X|Xs]); + bind_vars(Vs, Env0#{X=>0}, [X|Xs]); bind_vars([], Env,Xs) -> {Xs, Env}. @@ -217,7 +219,7 @@ visit_pats([], Env, Vs) -> {Vs, Env}. visit_pat(Env0, #c_var{name=V}, Vs) -> - {[V|Vs], dict:store(V, 0, Env0)}; + {[V|Vs], Env0#{V=>0}}; visit_pat(Env0, #c_tuple{es=Es}, Vs) -> visit_pats(Es, Env0, Vs); visit_pat(Env0, #c_map{es=Es}, Vs) -> @@ -235,23 +237,25 @@ visit_pat(Env0, #c_bitstr{val=Val,size=Sz}, Vs0) -> case Sz of #c_var{name=V} -> %% We don't tolerate free variables. - {ok, N} = dict:find(V, Env0), - {Vs0, dict:store(V, N+1, Env0)}; + case Env0 of + #{V:=N} -> + {Vs0, Env0#{V:=N+1}} + end; _ -> visit_pat(Env0, Sz, Vs0) end, visit_pat(Env1, Val, Vs1); visit_pat(Env0, #c_alias{pat=P,var=#c_var{name=V}}, Vs) -> - visit_pat(dict:store(V, 0, Env0), P, [V|Vs]); + visit_pat(Env0#{V=>0}, P, [V|Vs]); visit_pat(Env, #c_literal{}, Vs) -> {Vs, Env}. restore_vars([V|Vs], Env0, Env1) -> - case dict:find(V, Env0) of - {ok, N} -> - restore_vars(Vs, Env0, dict:store(V, N, Env1)); - error -> - restore_vars(Vs, Env0, dict:erase(V, Env1)) + case Env0 of + #{V:=N} -> + restore_vars(Vs, Env0, Env1#{V=>N}); + _ -> + restore_vars(Vs, Env0, maps:remove(V, Env1)) end; restore_vars([], _, Env1) -> Env1. @@ -349,8 +353,8 @@ is_safe(#c_literal{}) -> true; is_safe(_) -> false. is_single_use(V, Env) -> - case dict:find(V, Env) of - {ok, 1} -> + case Env of + #{V:=1} -> true; _ -> false diff --git a/lib/compiler/src/sys_core_fold.erl b/lib/compiler/src/sys_core_fold.erl index 65699ccda9..ab67c8164b 100644 --- a/lib/compiler/src/sys_core_fold.erl +++ b/lib/compiler/src/sys_core_fold.erl @@ -277,7 +277,7 @@ expr(#c_fun{}=Fun, effect, _) -> add_warning(Fun, useless_building), void(); expr(#c_fun{vars=Vs0,body=B0}=Fun, Ctxt0, Sub0) -> - {Vs1,Sub1} = pattern_list(Vs0, Sub0), + {Vs1,Sub1} = var_list(Vs0, Sub0), Ctxt = case Ctxt0 of {letrec,Ctxt1} -> Ctxt1; value -> value @@ -420,13 +420,13 @@ expr(#c_try{anno=A,arg=E0,vars=Vs0,body=B0,evars=Evs0,handler=H0}=Try, _, Sub0) %% Here is the general try/catch construct outside of guards. %% We can remove try if the value is simple and replace it with a let. E1 = body(E0, value, Sub0), - {Vs1,Sub1} = pattern_list(Vs0, Sub0), + {Vs1,Sub1} = var_list(Vs0, Sub0), B1 = body(B0, value, Sub1), case is_safe_simple(E1, Sub0) of true -> expr(#c_let{anno=A,vars=Vs1,arg=E1,body=B1}, value, Sub0); false -> - {Evs1,Sub2} = pattern_list(Evs0, Sub0), + {Evs1,Sub2} = var_list(Evs0, Sub0), H1 = body(H0, value, Sub2), Try#c_try{arg=E1,vars=Vs1,body=B1,evars=Evs1,handler=H1} end. @@ -1078,15 +1078,28 @@ is_atom_or_var(_) -> false. %% clause(Clause, Cepxr, Context, Sub) -> Clause. -clause(#c_clause{pats=Ps0,guard=G0,body=B0}=Cl, Cexpr, Ctxt, Sub0) -> - {Ps1,Sub1} = pattern_list(Ps0, Sub0), +clause(#c_clause{pats=Ps0}=Cl, Cexpr, Ctxt, Sub0) -> + try pattern_list(Ps0, Sub0) of + {Ps1,Sub1} -> + clause_1(Cl, Ps1, Cexpr, Ctxt, Sub1) + catch + nomatch -> + Cl#c_clause{anno=[compiler_generated], + guard=#c_literal{val=false}} + end. + +clause_1(#c_clause{guard=G0,body=B0}=Cl, Ps1, Cexpr, Ctxt, Sub1) -> Sub2 = update_types(Cexpr, Ps1, Sub1), - GSub = case {Cexpr,Ps1} of - {#c_var{name='_'},_} -> + GSub = case {Cexpr,Ps1,G0} of + {_,_,#c_literal{}} -> + %% No need for substitution tricks when the guard + %% does not contain any variables. + Sub2; + {#c_var{name='_'},_,_} -> %% In a 'receive', Cexpr is the variable '_', which represents the %% message being matched. We must NOT do any extra substiutions. Sub2; - {#c_var{},[#c_var{}=Var]} -> + {#c_var{},[#c_var{}=Var],_} -> %% The idea here is to optimize expressions such as %% %% case A of A -> ... @@ -1120,7 +1133,7 @@ clause(#c_clause{pats=Ps0,guard=G0,body=B0}=Cl, Cexpr, Ctxt, Sub0) -> %% the unsubstituted variables and values. let_substs(Vs0, As0, Sub0) -> - {Vs1,Sub1} = pattern_list(Vs0, Sub0), + {Vs1,Sub1} = var_list(Vs0, Sub0), {Vs2,As1,Ss} = let_substs_1(Vs1, As0, Sub1), Sub2 = sub_add_scope([V || #c_var{name=V} <- Vs2], Sub1), {Vs2,As1, @@ -1206,20 +1219,132 @@ bin_pattern_list(Ps0, Isub, Osub0) -> {Ps,{_,Osub}} = mapfoldl(fun bin_pattern/2, {Isub,Osub0}, Ps0), {Ps,Osub}. -bin_pattern(#c_bitstr{val=E0,size=Size0}=Pat, {Isub0,Osub0}) -> +bin_pattern(#c_bitstr{val=E0,size=Size0}=Pat0, {Isub0,Osub0}) -> Size1 = expr(Size0, Isub0), {E1,Osub} = pattern(E0, Isub0, Osub0), Isub = case E0 of #c_var{} -> sub_set_var(E0, E1, Isub0); _ -> Isub0 end, - {Pat#c_bitstr{val=E1,size=Size1},{Isub,Osub}}. + Pat = Pat0#c_bitstr{val=E1,size=Size1}, + bin_pat_warn(Pat), + {Pat,{Isub,Osub}}. pattern_list(Ps, Sub) -> pattern_list(Ps, Sub, Sub). pattern_list(Ps0, Isub, Osub0) -> mapfoldl(fun (P, Osub) -> pattern(P, Isub, Osub) end, Osub0, Ps0). +%% var_list([Var], InSub) -> {Pattern,OutSub}. +%% Works like pattern_list/2 but only accept variables and is +%% guaranteed not to throw an exception. + +var_list(Vs, Sub0) -> + mapfoldl(fun (#c_var{}=V, Sub) -> + pattern(V, Sub, Sub) + end, Sub0, Vs). + + +%%% +%%% Generate warnings for binary patterns that will not match. +%%% + +bin_pat_warn(#c_bitstr{type=#c_literal{val=Type}, + val=Val0, + size=#c_literal{val=Sz}, + unit=#c_literal{val=Unit}, + flags=Fl}=Pat) -> + case {Type,Sz} of + {_,_} when is_integer(Sz), Sz >= 0 -> ok; + {binary,all} -> ok; + {utf8,undefined} -> ok; + {utf16,undefined} -> ok; + {utf32,undefined} -> ok; + {_,_} -> + add_warning(Pat, {nomatch_bit_syntax_size,Sz}), + throw(nomatch) + end, + case {Type,Val0} of + {integer,#c_literal{val=Val}} when is_integer(Val) -> + Signedness = signedness(Fl), + TotalSz = Sz * Unit, + bit_pat_warn_int(Val, TotalSz, Signedness, Pat); + {float,#c_literal{val=Val}} when is_float(Val) -> + ok; + {utf8,#c_literal{val=Val}} when is_integer(Val) -> + bit_pat_warn_unicode(Val, Pat); + {utf16,#c_literal{val=Val}} when is_integer(Val) -> + bit_pat_warn_unicode(Val, Pat); + {utf32,#c_literal{val=Val}} when is_integer(Val) -> + bit_pat_warn_unicode(Val, Pat); + {_,#c_literal{val=Val}} -> + add_warning(Pat, {nomatch_bit_syntax_type,Val,Type}), + throw(nomatch); + {_,_} -> + ok + end; +bin_pat_warn(#c_bitstr{type=#c_literal{val=Type},val=Val0,flags=Fl}=Pat) -> + %% Size is variable. Not much that we can check. + case {Type,Val0} of + {integer,#c_literal{val=Val}} when is_integer(Val) -> + case signedness(Fl) of + unsigned when Val < 0 -> + add_warning(Pat, {nomatch_bit_syntax_unsigned,Val}), + throw(nomatch); + _ -> + ok + end; + {float,#c_literal{val=Val}} when is_float(Val) -> + ok; + {_,#c_literal{val=Val}} -> + add_warning(Pat, {nomatch_bit_syntax_type,Val,Type}), + throw(nomatch); + {_,_} -> + ok + end. + +bit_pat_warn_int(Val, 0, signed, Pat) -> + if + Val =:= 0 -> + ok; + true -> + add_warning(Pat, {nomatch_bit_syntax_truncated,signed,Val,0}), + throw(nomatch) + end; +bit_pat_warn_int(Val, Sz, signed, Pat) -> + if + Val < 0, Val bsr (Sz - 1) =/= -1 -> + add_warning(Pat, {nomatch_bit_syntax_truncated,signed,Val,Sz}), + throw(nomatch); + Val > 0, Val bsr (Sz - 1) =/= 0 -> + add_warning(Pat, {nomatch_bit_syntax_truncated,signed,Val,Sz}), + throw(nomatch); + true -> + ok + end; +bit_pat_warn_int(Val, _Sz, unsigned, Pat) when Val < 0 -> + add_warning(Pat, {nomatch_bit_syntax_unsigned,Val}), + throw(nomatch); +bit_pat_warn_int(Val, Sz, unsigned, Pat) -> + if + Val bsr Sz =:= 0 -> + ok; + true -> + add_warning(Pat, {nomatch_bit_syntax_truncated,unsigned,Val,Sz}), + throw(nomatch) + end. + +bit_pat_warn_unicode(U, _Pat) when 0 =< U, U =< 16#10FFFF -> + ok; +bit_pat_warn_unicode(U, Pat) -> + add_warning(Pat, {nomatch_bit_syntax_unicode,U}), + throw(nomatch). + +signedness(#c_literal{val=Flags}) -> + [S] = [F || F <- Flags, F =:= signed orelse F =:= unsigned], + S. + + %% is_subst(Expr) -> true | false. %% Test whether an expression is a suitable substitution. @@ -2251,11 +2376,11 @@ 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), + {OuterVs,ScopeSub} = var_list(OuterVs0, ScopeSub0), OuterBody = body(OuterBody0, ScopeSub), - {InnerVs,Sub} = pattern_list(InnerVs0, Sub0), + {InnerVs,Sub} = var_list(InnerVs0, Sub0), InnerBody = body(InnerBody0, Sub), Outer#c_let{vars=OuterVs,arg=Arg, body=Inner#c_let{vars=InnerVs,arg=OuterBody,body=InnerBody}}; @@ -2271,39 +2396,49 @@ move_let_into_expr(#c_let{vars=Lvs0,body=Lbody0}=Let, case {TwoClauses,is_failing_clause(Ca0),is_failing_clause(Cb0)} of {true,false,true} -> %% let <Lvars> = case <Case-expr> of - %% <Cvars> -> <Clause-body>; - %% <OtherCvars> -> erlang:error(...) + %% <Cpats> -> <Clause-body>; + %% <OtherCpats> -> erlang:error(...) %% end %% in <Let-body> %% %% ==> %% %% case <Case-expr> of - %% <Cvars> -> + %% <Cpats> -> %% let <Lvars> = <Clause-body> %% in <Let-body>; - %% <OtherCvars> -> erlang:error(...) + %% <OtherCpats> -> erlang:error(...) %% end Cexpr = body(Cexpr0, Sub0), - CaVars0 = Ca0#c_clause.pats, + CaPats0 = Ca0#c_clause.pats, G0 = Ca0#c_clause.guard, B0 = Ca0#c_clause.body, ScopeSub0 = sub_subst_scope(Sub0#sub{t=#{}}), - {CaVars,ScopeSub} = pattern_list(CaVars0, ScopeSub0), - G = guard(G0, ScopeSub), - - B1 = body(B0, ScopeSub), - - {Lvs,B2,Sub1} = let_substs(Lvs0, B1, Sub0), - Sub2 = Sub1#sub{s=cerl_sets:union(ScopeSub#sub.s, - Sub1#sub.s)}, - Lbody = body(Lbody0, Sub2), - B = Let#c_let{vars=Lvs,arg=core_lib:make_values(B2),body=Lbody}, - - Ca = Ca0#c_clause{pats=CaVars,guard=G,body=B}, - Cb = clause(Cb0, Cexpr, value, Sub0), - Case#c_case{arg=Cexpr,clauses=[Ca,Cb]}; + try pattern_list(CaPats0, ScopeSub0) of + {CaPats,ScopeSub} -> + G = guard(G0, ScopeSub), + + B1 = body(B0, ScopeSub), + + {Lvs,B2,Sub1} = let_substs(Lvs0, B1, Sub0), + Sub2 = Sub1#sub{s=cerl_sets:union(ScopeSub#sub.s, + Sub1#sub.s)}, + Lbody = body(Lbody0, Sub2), + B = Let#c_let{vars=Lvs, + arg=core_lib:make_values(B2), + body=Lbody}, + + Ca = Ca0#c_clause{pats=CaPats,guard=G,body=B}, + Cb = clause(Cb0, Cexpr, value, Sub0), + Case#c_case{arg=Cexpr,clauses=[Ca,Cb]} + catch + nomatch -> + %% This is not a defeat. The code will eventually + %% be optimized to erlang:error(...) by the other + %% optimizations done in this module. + impossible + end; {_,_,_} -> impossible end; move_let_into_expr(#c_let{vars=Lvs0,body=Lbody0}=Let, @@ -2595,7 +2730,7 @@ move_case_into_arg(#c_case{arg=#c_let{vars=OuterVars0,arg=OuterArg, %% in case <InnerArg> of <InnerClauses> end %% ScopeSub0 = sub_subst_scope(Sub#sub{t=#{}}), - {OuterVars,ScopeSub} = pattern_list(OuterVars0, ScopeSub0), + {OuterVars,ScopeSub} = var_list(OuterVars0, ScopeSub0), InnerArg = body(InnerArg0, ScopeSub), Outer#c_let{vars=OuterVars,arg=OuterArg, body=Inner#c_case{arg=InnerArg,clauses=InnerClauses}}; @@ -2624,14 +2759,18 @@ move_case_into_arg(#c_case{arg=#c_case{arg=OuterArg, %% end %% ScopeSub0 = sub_subst_scope(Sub#sub{t=#{}}), - {OuterPats,ScopeSub} = pattern_list(OuterPats0, ScopeSub0), - OuterGuard = guard(OuterGuard0, ScopeSub), - InnerArg = body(InnerArg0, ScopeSub), - Inner = Inner0#c_case{arg=InnerArg,clauses=InnerClauses}, - OuterCa = OuterCa0#c_clause{pats=OuterPats,guard=OuterGuard, - body=Inner}, - Outer#c_case{arg=OuterArg, - clauses=[OuterCa,OuterCb]}; + + %% We KNOW that pattern_list/2 has already been called for OuterPats0; + %% therefore, it cannot throw an exception. + {OuterPats,ScopeSub} = pattern_list(OuterPats0, ScopeSub0), + OuterGuard = guard(OuterGuard0, ScopeSub), + InnerArg = body(InnerArg0, ScopeSub), + Inner = Inner0#c_case{arg=InnerArg,clauses=InnerClauses}, + OuterCa = OuterCa0#c_clause{pats=OuterPats, + guard=OuterGuard, + body=Inner}, + Outer#c_case{arg=OuterArg, + clauses=[OuterCa,OuterCb]}; false -> impossible end; @@ -2793,12 +2932,18 @@ extract_type_1(Expr, Sub) -> true -> bool end. +returns_integer('band', [_,_]) -> true; +returns_integer('bnot', [_]) -> true; +returns_integer('bor', [_,_]) -> true; +returns_integer('bxor', [_,_]) -> true; returns_integer(bit_size, [_]) -> true; returns_integer('bsl', [_,_]) -> true; returns_integer('bsr', [_,_]) -> true; returns_integer(byte_size, [_]) -> true; +returns_integer('div', [_,_]) -> true; returns_integer(length, [_]) -> true; returns_integer('rem', [_,_]) -> true; +returns_integer('round', [_]) -> true; returns_integer(size, [_]) -> true; returns_integer(tuple_size, [_]) -> true; returns_integer(trunc, [_]) -> true; @@ -3207,6 +3352,29 @@ format_error(nomatch_shadow) -> "this clause cannot match because a previous clause always matches"; format_error(nomatch_guard) -> "the guard for this clause evaluates to 'false'"; +format_error({nomatch_bit_syntax_truncated,Signess,Val,Sz}) -> + S = case Signess of + signed -> "a 'signed'"; + unsigned -> "an 'unsigned'" + end, + F = "this clause cannot match because the value ~P" + " will not fit in ~s binary segment of size ~p", + flatten(io_lib:format(F, [Val,10,S,Sz])); +format_error({nomatch_bit_syntax_unsigned,Val}) -> + F = "this clause cannot match because the negative value ~P" + " will never match the value of an 'unsigned' binary segment", + flatten(io_lib:format(F, [Val,10])); +format_error({nomatch_bit_syntax_size,Sz}) -> + F = "this clause cannot match because '~P' is not a valid size for a binary segment", + flatten(io_lib:format(F, [Sz,10])); +format_error({nomatch_bit_syntax_type,Val,Type}) -> + F = "this clause cannot match because '~P' is not of the" + " expected type '~p'", + flatten(io_lib:format(F, [Val,10,Type])); +format_error({nomatch_bit_syntax_unicode,Val}) -> + F = "this clause cannot match because the value ~p" + " is not a valid Unicode code point", + flatten(io_lib:format(F, [Val])); format_error(no_clause_match) -> "no clause will ever match"; format_error(nomatch_clause_type) -> diff --git a/lib/compiler/src/sys_pre_expand.erl b/lib/compiler/src/sys_pre_expand.erl index d9cc4b530c..7ab4e1845c 100644 --- a/lib/compiler/src/sys_pre_expand.erl +++ b/lib/compiler/src/sys_pre_expand.erl @@ -29,30 +29,26 @@ %% Main entry point. -export([module/2]). --import(ordsets, [from_list/1,union/2]). -import(lists, [member/2,foldl/3,foldr/3]). --include("../include/erl_bits.hrl"). - -type fa() :: {atom(), arity()}. -record(expand, {module=[], %Module name exports=[], %Exports - imports=[], %Imports attributes=[], %Attributes callbacks=[], %Callbacks optional_callbacks=[] :: [fa()], %Optional callbacks - defined, %Defined functions (gb_set) vcount=0, %Variable counter func=[], %Current function arity=[], %Arity for current function - fcount=0 %Local fun count + fcount=0, %Local fun count + ctype %Call type map }). %% module(Forms, CompileOptions) %% {ModuleName,Exports,TransformedForms,CompileOptions'} -%% Expand the forms in one module. N.B.: the lists of predefined -%% exports and imports are really ordsets! +%% Expand the forms in one module. +%% %% CompileOptions is augmented with options from -compile attributes. module(Fs0, Opts0) -> @@ -65,19 +61,28 @@ module(Fs0, Opts0) -> %% Set pre-defined exported functions. PreExp = [{module_info,0},{module_info,1}], + %% Build the set of defined functions and the initial call + %% type map. + Defined = defined_functions(Fs, PreExp), + Ctype = maps:from_list([{K,local} || K <- Defined]), + %% Build initial expand record. St0 = #expand{exports=PreExp, - defined=PreExp + ctype=Ctype }, + %% Expand the functions. - {Tfs,St1} = forms(Fs, define_functions(Fs, St0)), + {Tfs,St1} = forms(Fs, St0), + %% Get the correct list of exported functions. Exports = case member(export_all, Opts) of - true -> gb_sets:to_list(St1#expand.defined); + true -> Defined; false -> St1#expand.exports end, + St2 = St1#expand{exports=Exports,ctype=undefined}, + %% Generate all functions from stored info. - {Ats,St3} = module_attrs(St1#expand{exports = Exports}), + {Ats,St3} = module_attrs(St2), {Mfs,St4} = module_predef_funcs(St3), {St4#expand.module, St4#expand.exports, Ats ++ Tfs ++ Mfs, Opts}. @@ -85,14 +90,14 @@ module(Fs0, Opts0) -> compiler_options(Forms) -> lists:flatten([C || {attribute,_,compile,C} <- Forms]). -%% define_function(Form, State) -> State. +%% defined_function(Forms, Predef) -> Functions. %% Add function to defined if form is a function. -define_functions(Forms, #expand{defined=Predef}=St) -> +defined_functions(Forms, Predef) -> Fs = foldl(fun({function,_,N,A,_Cs}, Acc) -> [{N,A}|Acc]; (_, Acc) -> Acc end, Predef, Forms), - St#expand{defined=gb_sets:from_list(Fs)}. + ordsets:from_list(Fs). module_attrs(#expand{attributes=Attributes}=St) -> Attrs = [{attribute,Line,Name,Val} || {Name,Line,Val} <- Attributes], @@ -113,23 +118,21 @@ is_fa_list([{FuncName, Arity}|L]) is_fa_list([]) -> true; is_fa_list(_) -> false. -module_predef_funcs(St) -> - {Mpf1,St1}=module_predef_func_beh_info(St), - {Mpf2,St2}=module_predef_funcs_mod_info(St1), +module_predef_funcs(St0) -> + {Mpf1,St1} = module_predef_func_beh_info(St0), + Mpf2 = module_predef_funcs_mod_info(St1), Mpf = [erl_parse:new_anno(F) || F <- Mpf1++Mpf2], - {Mpf,St2}. + {Mpf,St1}. module_predef_func_beh_info(#expand{callbacks=[]}=St) -> {[], St}; module_predef_func_beh_info(#expand{callbacks=Callbacks, optional_callbacks=OptionalCallbacks, - defined=Defined, exports=Exports}=St) -> - PreDef=[{behaviour_info,1}], - PreExp=PreDef, + PreDef0 = [{behaviour_info,1}], + PreDef = ordsets:from_list(PreDef0), {[gen_beh_info(Callbacks, OptionalCallbacks)], - St#expand{defined=gb_sets:union(gb_sets:from_list(PreDef), Defined), - exports=union(from_list(PreExp), Exports)}}. + St#expand{exports=ordsets:union(PreDef, Exports)}}. gen_beh_info(Callbacks, OptionalCallbacks) -> List = make_list(Callbacks), @@ -156,20 +159,16 @@ make_optional_list([{Name,Arity}|Rest]) -> {integer,0,Arity}]}, make_optional_list(Rest)}. -module_predef_funcs_mod_info(St) -> - PreDef = [{module_info,0},{module_info,1}], - PreExp = PreDef, - {[{function,0,module_info,0, - [{clause,0,[],[], +module_predef_funcs_mod_info(#expand{module=Mod}) -> + ModAtom = {atom,0,Mod}, + [{function,0,module_info,0, + [{clause,0,[],[], [{call,0,{remote,0,{atom,0,erlang},{atom,0,get_module_info}}, - [{atom,0,St#expand.module}]}]}]}, - {function,0,module_info,1, - [{clause,0,[{var,0,'X'}],[], + [ModAtom]}]}]}, + {function,0,module_info,1, + [{clause,0,[{var,0,'X'}],[], [{call,0,{remote,0,{atom,0,erlang},{atom,0,get_module_info}}, - [{atom,0,St#expand.module},{var,0,'X'}]}]}]}], - St#expand{defined=gb_sets:union(gb_sets:from_list(PreDef), - St#expand.defined), - exports=union(from_list(PreExp), St#expand.exports)}}. + [ModAtom,{var,0,'X'}]}]}]}]. %% forms(Forms, State) -> %% {TransformedForms,State'} @@ -196,7 +195,8 @@ attribute(module, Module, _L, St) -> true = is_atom(Module), St#expand{module=Module}; attribute(export, Es, _L, St) -> - St#expand{exports=union(from_list(Es), St#expand.exports)}; + St#expand{exports=ordsets:union(ordsets:from_list(Es), + St#expand.exports)}; attribute(import, Is, _L, St) -> import(Is, St); attribute(compile, _C, _L, St) -> @@ -231,8 +231,6 @@ head(As, St) -> pattern_list(As, St). %% {TransformedPattern,State'} %% -pattern({var,_,'_'}=Var, St) -> %Ignore anonymous variable. - {Var,St}; pattern({var,_,_}=Var, St) -> {Var,St}; pattern({char,_,_}=Char, St) -> @@ -385,19 +383,19 @@ expr({block,Line,Es0}, St0) -> {Es,St1} = exprs(Es0, St0), {{block,Line,Es},St1}; expr({'if',Line,Cs0}, St0) -> - {Cs,St1} = icr_clauses(Cs0, St0), + {Cs,St1} = clauses(Cs0, St0), {{'if',Line,Cs},St1}; expr({'case',Line,E0,Cs0}, St0) -> {E,St1} = expr(E0, St0), - {Cs,St2} = icr_clauses(Cs0, St1), + {Cs,St2} = clauses(Cs0, St1), {{'case',Line,E,Cs},St2}; expr({'receive',Line,Cs0}, St0) -> - {Cs,St1} = icr_clauses(Cs0, St0), + {Cs,St1} = clauses(Cs0, St0), {{'receive',Line,Cs},St1}; expr({'receive',Line,Cs0,To0,ToEs0}, St0) -> {To,St1} = expr(To0, St0), {ToEs,St2} = exprs(ToEs0, St1), - {Cs,St3} = icr_clauses(Cs0, St2), + {Cs,St3} = clauses(Cs0, St2), {{'receive',Line,Cs,To,ToEs},St3}; expr({'fun',Line,Body}, St) -> fun_tq(Line, Body, St); @@ -406,21 +404,15 @@ expr({named_fun,Line,Name,Cs}, St) -> expr({call,Line,{atom,La,N}=Atom,As0}, St0) -> {As,St1} = expr_list(As0, St0), Ar = length(As), - case defined(N,Ar,St1) of - true -> + Key = {N,Ar}, + case St1#expand.ctype of + #{Key:=local} -> {{call,Line,Atom,As},St1}; + #{Key:={imported,Mod}} -> + {{call,Line,{remote,La,{atom,La,Mod},Atom},As},St1}; _ -> - case imported(N, Ar, St1) of - {yes,Mod} -> - {{call,Line,{remote,La,{atom,La,Mod},Atom},As},St1}; - no -> - case erl_internal:bif(N, Ar) of - true -> - {{call,Line,{remote,La,{atom,La,erlang},Atom},As},St1}; - false -> %% This should have been handled by erl_lint - {{call,Line,Atom,As},St1} - end - end + true = erl_internal:bif(N, Ar), + {{call,Line,{remote,La,{atom,La,erlang},Atom},As},St1} end; expr({call,Line,{remote,Lr,M0,F},As0}, St0) -> {[M1,F1|As1],St1} = expr_list([M0,F|As0], St0), @@ -430,12 +422,11 @@ expr({call,Line,F,As0}, St0) -> {{call,Line,Fun1,As1},St1}; expr({'try',Line,Es0,Scs0,Ccs0,As0}, St0) -> {Es1,St1} = exprs(Es0, St0), - {Scs1,St2} = icr_clauses(Scs0, St1), - {Ccs1,St3} = icr_clauses(Ccs0, St2), + {Scs1,St2} = clauses(Scs0, St1), + {Ccs1,St3} = clauses(Ccs0, St2), {As1,St4} = exprs(As0, St3), {{'try',Line,Es1,Scs1,Ccs1,As1},St4}; expr({'catch',Line,E0}, St0) -> - %% Catch exports no new variables. {E,St1} = expr(E0, St0), {{'catch',Line,E},St1}; expr({match,Line,P0,E0}, St0) -> @@ -456,21 +447,6 @@ expr_list([E0|Es0], St0) -> {[E|Es],St2}; expr_list([], St) -> {[],St}. -%% icr_clauses([Clause], State) -> {[TransformedClause],State'} -%% Be very careful here to return the variables that are really used -%% and really new. - -icr_clauses([], St) -> {[],St}; -icr_clauses(Clauses, St) -> icr_clauses2(Clauses, St). - -icr_clauses2([{clause,Line,H0,G0,B0}|Cs0], St0) -> - {H,St1} = head(H0, St0), - {G,St2} = guard(G0, St1), - {B,St3} = exprs(B0, St2), - {Cs,St4} = icr_clauses2(Cs0, St3), - {[{clause,Line,H,G,B}|Cs],St4}; -icr_clauses2([], St) -> {[],St}. - %% lc_tq(Line, Qualifiers, State) -> %% {[TransQual],State'} @@ -486,16 +462,9 @@ lc_tq(Line, [{b_generate,Lg,P0,G0}|Qs0], St0) -> {Qs1,St3} = lc_tq(Line, Qs0, St2), {[{b_generate,Lg,P1,G1}|Qs1],St3}; lc_tq(Line, [F0 | Qs0], St0) -> - case erl_lint:is_guard_test(F0) of - true -> - {F1,St1} = guard_test(F0, St0), - {Qs1,St2} = lc_tq(Line, Qs0, St1), - {[F1|Qs1],St2}; - false -> - {F1,St1} = expr(F0, St0), - {Qs1,St2} = lc_tq(Line, Qs0, St1), - {[F1 | Qs1],St2} - end; + {F1,St1} = expr(F0, St0), + {Qs1,St2} = lc_tq(Line, Qs0, St1), + {[F1|Qs1],St2}; lc_tq(_Line, [], St0) -> {[],St0}. @@ -527,7 +496,7 @@ fun_tq(L, {function,M,F,A}, St) when is_atom(M), is_atom(F), is_integer(A) -> fun_tq(Lf, {function,_,_,_}=ExtFun, St) -> {{'fun',Lf,ExtFun},St}; fun_tq(Lf, {clauses,Cs0}, St0) -> - {Cs1,St1} = fun_clauses(Cs0, St0), + {Cs1,St1} = clauses(Cs0, St0), {Fname,St2} = new_fun_name(St1), %% Set dummy values for Index and Uniq -- the real values will %% be assigned by beam_asm. @@ -535,18 +504,10 @@ fun_tq(Lf, {clauses,Cs0}, St0) -> {{'fun',Lf,{clauses,Cs1},{Index,Uniq,Fname}},St2}. fun_tq(Line, Cs0, St0, Name) -> - {Cs1,St1} = fun_clauses(Cs0, St0), + {Cs1,St1} = clauses(Cs0, St0), {Fname,St2} = new_fun_name(St1, Name), {{named_fun,Line,Name,Cs1,{0,0,Fname}},St2}. -fun_clauses([{clause,L,H0,G0,B0}|Cs0], St0) -> - {H,St1} = head(H0, St0), - {G,St2} = guard(G0, St1), - {B,St3} = exprs(B0, St2), - {Cs,St4} = fun_clauses(Cs0, St3), - {[{clause,L,H,G,B}|Cs],St4}; -fun_clauses([], St) -> {[],St}. - %% new_fun_name(State) -> {FunName,State}. new_fun_name(St) -> @@ -571,7 +532,6 @@ pattern_element({bin_element,Line,Expr0,Size0,Type0}, {Es,St0}) -> {[{bin_element,Line,Expr,Size,Type}|Es],St2}. pat_bit_size(default, St) -> {default,St}; -pat_bit_size({atom,_La,all}=All, St) -> {All,St}; pat_bit_size({var,_Lv,_V}=Var, St) -> {Var,St}; pat_bit_size(Size, St) -> Line = element(2, Size), @@ -592,8 +552,7 @@ coerce_to_float({integer,L,I}=E, [float|_]) -> try {float,L,float(I)} catch - error:badarg -> E; - error:badarith -> E + error:badarg -> E end; coerce_to_float(E, _) -> E. @@ -647,25 +606,11 @@ string_to_conses(Line, Cs, Tail) -> %% import(Line, Imports, State) -> %% State' -%% imported(Name, Arity, State) -> -%% {yes,Module} | no -%% Handle import declarations and test for imported functions. No need to -%% check when building imports as code is correct. +%% Handle import declarations. -import({Mod,Fs}, St) -> +import({Mod,Fs}, #expand{ctype=Ctype0}=St) -> true = is_atom(Mod), - Mfs = from_list(Fs), - St#expand{imports=add_imports(Mod, Mfs, St#expand.imports)}. - -add_imports(Mod, [F|Fs], Is) -> - add_imports(Mod, Fs, orddict:store(F, Mod, Is)); -add_imports(_, [], Is) -> Is. - -imported(F, A, St) -> - case orddict:find({F,A}, St#expand.imports) of - {ok,Mod} -> {yes,Mod}; - error -> no - end. - -defined(F, A, St) -> - gb_sets:is_element({F,A}, St#expand.defined). + Ctype = foldl(fun(F, A) -> + A#{F=>{imported,Mod}} + end, Ctype0, Fs), + St#expand{ctype=Ctype}. diff --git a/lib/compiler/src/v3_codegen.erl b/lib/compiler/src/v3_codegen.erl index 2a89305f4d..6f1912c616 100644 --- a/lib/compiler/src/v3_codegen.erl +++ b/lib/compiler/src/v3_codegen.erl @@ -827,21 +827,24 @@ select_extract_bin([{var,Hd},{var,Tl}], Size0, Unit, Type, Flags, Vf, {bs_save2,CtxReg,{Ctx,Tl}}],Int1} end, {Es,clear_dead(Aft, I, Vdb),St}; -select_extract_bin([{var,Hd}], Size0, Unit, binary, Flags, Vf, +select_extract_bin([{var,Hd}], Size, Unit, binary, Flags, Vf, I, Vdb, Bef, Ctx, Body, St) -> - SizeReg = get_bin_size_reg(Size0, Bef), + %% Match the last segment of a binary. We KNOW that the size + %% must be 'all'. + Size = {atom,all}, %Assertion. {Es,Aft} = case vdb_find(Hd, Vdb) of {_,_,Lhd} when Lhd =< I -> + %% The result will not be used. Furthermore, since we + %% we are at the end of the binary, the position will + %% not be used again; thus, it is safe to do a cheaper + %% test of the unit. CtxReg = fetch_var(Ctx, Bef), - {case SizeReg =:= {atom,all} andalso is_context_unused(Body) of - true when Unit =:= 1 -> + {case Unit of + 1 -> []; - true -> - [{test,bs_test_unit,{f,Vf},[CtxReg,Unit]}]; - false -> - [{test,bs_skip_bits2,{f,Vf}, - [CtxReg,SizeReg,Unit,{field_flags,Flags}]}] + _ -> + [{test,bs_test_unit,{f,Vf},[CtxReg,Unit]}] end,Bef}; {_,_,_} -> case is_context_unused(Body) of @@ -853,7 +856,7 @@ select_extract_bin([{var,Hd}], Size0, Unit, binary, Flags, Vf, Name = bs_get_binary2, Live = max_reg(Bef#sr.reg), {[{test,Name,{f,Vf},Live, - [CtxReg,SizeReg,Unit,{field_flags,Flags}],Rhd}], + [CtxReg,Size,Unit,{field_flags,Flags}],Rhd}], Int1}; true -> %% Since the matching context will not be used again, @@ -868,7 +871,7 @@ select_extract_bin([{var,Hd}], Size0, Unit, binary, Flags, Vf, Name = bs_get_binary2, Live = max_reg(Int1#sr.reg), {[{test,Name,{f,Vf},Live, - [CtxReg,SizeReg,Unit,{field_flags,Flags}],CtxReg}], + [CtxReg,Size,Unit,{field_flags,Flags}],CtxReg}], Int1} end end, diff --git a/lib/compiler/src/v3_core.erl b/lib/compiler/src/v3_core.erl index 7d93e2ae16..830dd9973a 100644 --- a/lib/compiler/src/v3_core.erl +++ b/lib/compiler/src/v3_core.erl @@ -469,7 +469,8 @@ unforce_tree([#iset{var=#c_var{name=V},arg=Arg0}|Es], D0) -> unforce_tree(Es, D); unforce_tree([#icall{}=Call], D) -> unforce_tree_subst(Call, D); -unforce_tree([Top], _) -> Top. +unforce_tree([#c_var{name=V}], D) -> + gb_trees:get(V, D). unforce_tree_subst(#icall{module=#c_literal{val=erlang}, name=#c_literal{val='=:='}, @@ -1079,13 +1080,39 @@ bc_tq1(Line, E, [#igen{anno=GAnno,ceps=Ceps, bc_tq1(Line, E, [#ifilter{}=Filter|Qs], Mc, St) -> filter_tq(Line, E, Filter, Mc, St, Qs, fun bc_tq1/5); bc_tq1(_, {bin,Bl,Elements}, [], AccVar, St0) -> - {E,Pre,St} = expr({bin,Bl,[{bin_element,Bl, - {var,Bl,AccVar#c_var.name}, - {atom,Bl,all}, - [binary,{unit,1}]}|Elements]}, St0), + bc_tq_build(Bl, [], AccVar, Elements, St0); +bc_tq1(Line, E0, [], AccVar, St0) -> + BsFlags = [binary,{unit,1}], + BsSize = {atom,Line,all}, + {E1,Pre0,St1} = safe(E0, St0), + case E1 of + #c_var{name=VarName} -> + Var = {var,Line,VarName}, + Els = [{bin_element,Line,Var,BsSize,BsFlags}], + bc_tq_build(Line, Pre0, AccVar, Els, St1); + #c_literal{val=Val} when is_bitstring(Val) -> + Bits = bit_size(Val), + <<Int0:Bits>> = Val, + Int = {integer,Line,Int0}, + Sz = {integer,Line,Bits}, + Els = [{bin_element,Line,Int,Sz,[integer,{unit,1},big]}], + bc_tq_build(Line, Pre0, AccVar, Els, St1); + _ -> + %% Any other safe (cons, tuple, literal) is not a + %% bitstring. Force the evaluation to fail (and + %% generate a warning). + Els = [{bin_element,Line,{atom,Line,bad_value},BsSize,BsFlags}], + bc_tq_build(Line, Pre0, AccVar, Els, St1) + end. + +bc_tq_build(Line, Pre0, #c_var{name=AccVar}, Elements0, St0) -> + Elements = [{bin_element,Line,{var,Line,AccVar},{atom,Line,all}, + [binary,{unit,1}]}|Elements0], + {E,Pre,St} = expr({bin,Line,Elements}, St0), #a{anno=A} = Anno0 = get_anno(E), Anno = Anno0#a{anno=[compiler_generated,single_use|A]}, - {set_anno(E, Anno),Pre,St}. + {set_anno(E, Anno),Pre0++Pre,St}. + %% filter_tq(Line, Expr, Filter, Mc, State, [Qualifier], TqFun) -> %% {Case,[PreExpr],State}. @@ -1306,7 +1333,9 @@ bc_elem_size({bin,_,El}, St0) -> Vs = [V || {_,#c_var{name=V}} <- Vars0], {E,Pre,St} = bc_mul_pairs(F, #c_literal{val=Bits}, [], St0), {E,Pre,Vs,St} - end. + end; +bc_elem_size(_, _) -> + throw(impossible). bc_elem_size_1([{bin_element,_,_,{integer,_,N},Flags}|Es], Bits, Vars) -> {unit,U} = keyfind(unit, 1, Flags), @@ -1652,10 +1681,12 @@ pat_alias_map_pairs_1([]) -> []. pat_bin(Ps, St) -> [pat_segment(P, St) || P <- Ps]. -pat_segment({bin_element,_,Val,Size,[Type,{unit,Unit}|Flags]}, St) -> +pat_segment({bin_element,L,Val,Size,[Type,{unit,Unit}|Flags]}, St) -> + Anno = lineno_anno(L, St), {Pval,[],St1} = pattern(Val,St), {Psize,[],_St2} = pattern(Size,St1), - #c_bitstr{val=Pval,size=Psize, + #c_bitstr{anno=Anno, + val=Pval,size=Psize, unit=#c_literal{val=Unit}, type=#c_literal{val=Type}, flags=#c_literal{val=Flags}}. @@ -1852,27 +1883,22 @@ uguard(Pg, Gs0, Ks, St0) -> %% 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. + case upat_is_new_var(P0, Ks) of + true -> + %% Assignment to a new variable. 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. - {La0,Lps,St1} = force_safe(Arg, St0), - La = mark_compiler_generated(La0), - Mc = #iclause{anno=A,pats=[P0],guard=[],body=[La]}, - uexprs(Lps ++ [#icase{anno=A, - args=[La0],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 + false when Les =:= [] -> + %% Need to explicitly return match "value", make + %% safe for efficiency. + {La0,Lps,St1} = force_safe(Arg, St0), + La = mark_compiler_generated(La0), + Mc = #iclause{anno=A,pats=[P0],guard=[],body=[La]}, + uexprs(Lps ++ [#icase{anno=A, + args=[La0],clauses=[Mc],fc=Fc}], Ks, St1); + false -> + Mc = #iclause{anno=A,pats=[P0],guard=[],body=Les}, + uexprs([#icase{anno=A,args=[Arg], + clauses=[Mc],fc=Fc}], Ks, St0) end; uexprs([Le0|Les0], Ks, St0) -> {Le1,St1} = uexpr(Le0, Ks, St0), @@ -1880,6 +1906,15 @@ uexprs([Le0|Les0], Ks, St0) -> {[Le1|Les1],St2}; uexprs([], _, St) -> {[],St}. +%% upat_is_new_var(Pattern, [KnownVar]) -> true|false. +%% Test whether the pattern is a single, previously unknown +%% variable. + +upat_is_new_var(#c_var{name=V}, Ks) -> + not is_element(V, Ks); +upat_is_new_var(_, _) -> + false. + %% Mark a "safe" as compiler-generated. mark_compiler_generated(#c_cons{anno=A,hd=H,tl=T}) -> ann_c_cons([compiler_generated|A], mark_compiler_generated(H), diff --git a/lib/compiler/src/v3_kernel.erl b/lib/compiler/src/v3_kernel.erl index 7ee564683b..4446d5ff1d 100644 --- a/lib/compiler/src/v3_kernel.erl +++ b/lib/compiler/src/v3_kernel.erl @@ -1,7 +1,7 @@ %% %% %CopyrightBegin% %% -%% Copyright Ericsson AB 1999-2013. All Rights Reserved. +%% Copyright Ericsson AB 1999-2015. All Rights Reserved. %% %% Licensed under the Apache License, Version 2.0 (the "License"); %% you may not use this file except in compliance with the License. @@ -117,7 +117,7 @@ copy_anno(Kdst, Ksrc) -> fcount=0, %Fun counter ds=cerl_sets:new() :: cerl_sets:set(), %Defined variables funs=[], %Fun functions - free=[], %Free variables + free=#{}, %Free variables ws=[] :: [warning()], %Warnings. guard_refc=0}). %> 0 means in guard @@ -143,8 +143,10 @@ attributes([]) -> []. include_attribute(type) -> false; include_attribute(spec) -> false; +include_attribute(callback) -> false; include_attribute(opaque) -> false; include_attribute(export_type) -> false; +include_attribute(record) -> false; include_attribute(_) -> true. function({#c_var{name={F,Arity}=FA},Body}, St0) -> @@ -1837,14 +1839,17 @@ handle_reuse_anno_1(V, _St) -> V. %% get_free(Name, Arity, State) -> [Free]. %% store_free(Name, Arity, [Free], State) -> State. -get_free(F, A, St) -> - case orddict:find({F,A}, St#kern.free) of - {ok,Val} -> Val; - error -> [] +get_free(F, A, #kern{free=FreeMap}) -> + Key = {F,A}, + case FreeMap of + #{Key:=Val} -> Val; + _ -> [] end. -store_free(F, A, Free, St) -> - St#kern{free=orddict:store({F,A}, Free, St#kern.free)}. +store_free(F, A, Free, #kern{free=FreeMap0}=St) -> + Key = {F,A}, + FreeMap = FreeMap0#{Key=>Free}, + St#kern{free=FreeMap}. break_rets({break,Rs}) -> Rs; break_rets(return) -> []. |