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-rw-r--r--lib/compiler/src/Makefile1
-rw-r--r--lib/compiler/src/beam_block.erl301
-rw-r--r--lib/compiler/src/beam_bs.erl278
-rw-r--r--lib/compiler/src/beam_clean.erl20
-rw-r--r--lib/compiler/src/beam_dead.erl33
-rw-r--r--lib/compiler/src/beam_peep.erl16
-rw-r--r--lib/compiler/src/beam_type.erl152
-rw-r--r--lib/compiler/src/compile.erl2
-rw-r--r--lib/compiler/src/compiler.app.src1
-rw-r--r--lib/compiler/src/sys_core_fold.erl6
-rw-r--r--lib/compiler/src/v3_codegen.erl25
-rw-r--r--lib/compiler/test/Makefile2
-rw-r--r--lib/compiler/test/beam_type_SUITE.erl98
-rw-r--r--lib/compiler/test/bs_match_SUITE.erl18
-rw-r--r--lib/compiler/test/compile_SUITE.erl2
-rw-r--r--lib/compiler/test/misc_SUITE.erl4
16 files changed, 624 insertions, 335 deletions
diff --git a/lib/compiler/src/Makefile b/lib/compiler/src/Makefile
index ae4007c61c..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 \
diff --git a/lib/compiler/src/beam_block.erl b/lib/compiler/src/beam_block.erl
index 75202d9379..10dbaf462c 100644
--- a/lib/compiler/src/beam_block.erl
+++ b/lib/compiler/src/beam_block.erl
@@ -23,13 +23,13 @@
-module(beam_block).
-export([module/2]).
--import(lists, [mapfoldl/3,reverse/1,reverse/2,foldl/3,member/2]).
+-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),
@@ -39,11 +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(),
@@ -61,56 +58,15 @@ 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([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, []).
@@ -283,11 +239,7 @@ 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
@@ -497,234 +449,3 @@ 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_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 7d66985791..d9108c383d 100644
--- a/lib/compiler/src/beam_clean.erl
+++ b/lib/compiler/src/beam_clean.erl
@@ -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 0cb5040177..11129c39bc 100644
--- a/lib/compiler/src/beam_dead.erl
+++ b/lib/compiler/src/beam_dead.erl
@@ -239,10 +239,18 @@ 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),
+ 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},
@@ -264,14 +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) ->
@@ -307,6 +318,16 @@ backward([{test,Op,{f,To0},Ops0}|Is], D, Acc) ->
%% 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]);
@@ -366,6 +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_peep.erl b/lib/compiler/src/beam_peep.erl
index 75be86b83f..0c1abfe6a0 100644
--- a/lib/compiler/src/beam_peep.erl
+++ b/lib/compiler/src/beam_peep.erl
@@ -83,6 +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([{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 ->
@@ -127,3 +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_type.erl b/lib/compiler/src/beam_type.erl
index 40d67d1670..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],
@@ -94,6 +95,17 @@ simplify_basic_1([{set,[D],[TupleReg],{get_tuple_element,0}}=I|Is0], Ts0, Acc) -
end;
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.
@@ -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/compile.erl b/lib/compiler/src/compile.erl
index 605f5b8fd5..a2a23a2b90 100644
--- a/lib/compiler/src/compile.erl
+++ b/lib/compiler/src/compile.erl
@@ -679,6 +679,8 @@ asm_passes() ->
{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}},
diff --git a/lib/compiler/src/compiler.app.src b/lib/compiler/src/compiler.app.src
index 62ea9cee80..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,
diff --git a/lib/compiler/src/sys_core_fold.erl b/lib/compiler/src/sys_core_fold.erl
index 27d023d067..0a16776bd4 100644
--- a/lib/compiler/src/sys_core_fold.erl
+++ b/lib/compiler/src/sys_core_fold.erl
@@ -2793,12 +2793,18 @@ 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;
diff --git a/lib/compiler/src/v3_codegen.erl b/lib/compiler/src/v3_codegen.erl
index 34c67b16ca..5083995f30 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/test/Makefile b/lib/compiler/test/Makefile
index 6553d10077..0cd8618730 100644
--- a/lib/compiler/test/Makefile
+++ b/lib/compiler/test/Makefile
@@ -11,6 +11,7 @@ MODULES= \
beam_validator_SUITE \
beam_disasm_SUITE \
beam_except_SUITE \
+ beam_type_SUITE \
beam_utils_SUITE \
bs_bincomp_SUITE \
bs_bit_binaries_SUITE \
@@ -43,6 +44,7 @@ NO_OPT= \
andor \
apply \
beam_except \
+ beam_type \
beam_utils \
bs_construct \
bs_match \
diff --git a/lib/compiler/test/beam_type_SUITE.erl b/lib/compiler/test/beam_type_SUITE.erl
new file mode 100644
index 0000000000..8d5c0190ed
--- /dev/null
+++ b/lib/compiler/test/beam_type_SUITE.erl
@@ -0,0 +1,98 @@
+%%
+%% %CopyrightBegin%
+%%
+%% Copyright Ericsson AB 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.
+%% 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_type_SUITE).
+
+-export([all/0,suite/0,groups/0,init_per_suite/1,end_per_suite/1,
+ init_per_group/2,end_per_group/2,
+ integers/1,coverage/1,booleans/1]).
+
+suite() -> [{ct_hooks,[ts_install_cth]}].
+
+all() ->
+ test_lib:recompile(?MODULE),
+ [{group,p}].
+
+groups() ->
+ [{p,[parallel],
+ [integers,
+ coverage,
+ booleans
+ ]}].
+
+init_per_suite(Config) ->
+ Config.
+
+end_per_suite(_Config) ->
+ ok.
+
+init_per_group(_GroupName, Config) ->
+ Config.
+
+end_per_group(_GroupName, Config) ->
+ Config.
+
+integers(_Config) ->
+ a = do_integers_1(2#11000),
+ b = do_integers_1(2#11001),
+
+ a = do_integers_2(<<0:1>>),
+ {'EXIT',{{case_clause,-1},_}} = (catch do_integers_2(<<1:1>>)),
+
+ ok.
+
+do_integers_1(B0) ->
+ B = B0 band 1,
+ case B band 15 of
+ 0 -> a;
+ 1 -> b
+ end.
+
+do_integers_2(Bin) ->
+ <<B:1/signed>> = Bin,
+ case B of
+ 0 -> a;
+ 1 -> b
+ end.
+
+coverage(_Config) ->
+ {'EXIT',{badarith,_}} = (catch id(1) bsl 0.5),
+ {'EXIT',{badarith,_}} = (catch id(2.0) bsl 2),
+ {'EXIT',{badarith,_}} = (catch a + 0.5),
+ {'EXIT',{badarith,_}} = (catch 2.0 * b),
+
+ {'EXIT',{badarith,_}} = (catch id(42.0) / (1 bsl 2000)),
+
+ id(id(42) band 387439739874298734983787934283479243879),
+ id(-1 band id(13)),
+
+ ok.
+
+booleans(_Config) ->
+ {'EXIT',{{case_clause,_},_}} = (catch do_booleans(42)),
+ ok.
+
+do_booleans(B) ->
+ case is_integer(B) of
+ yes -> yes;
+ no -> no
+ end.
+
+id(I) ->
+ I.
diff --git a/lib/compiler/test/bs_match_SUITE.erl b/lib/compiler/test/bs_match_SUITE.erl
index 6e138b0a43..a19b152bc5 100644
--- a/lib/compiler/test/bs_match_SUITE.erl
+++ b/lib/compiler/test/bs_match_SUITE.erl
@@ -36,7 +36,7 @@
match_string/1,zero_width/1,bad_size/1,haystack/1,
cover_beam_bool/1,matched_out_size/1,follow_fail_branch/1,
no_partition/1,calling_a_binary/1,binary_in_map/1,
- match_string_opt/1]).
+ match_string_opt/1,select_on_integer/1]).
-export([coverage_id/1,coverage_external_ignore/2]).
@@ -62,7 +62,7 @@ groups() ->
otp_7498,match_string,zero_width,bad_size,haystack,
cover_beam_bool,matched_out_size,follow_fail_branch,
no_partition,calling_a_binary,binary_in_map,
- match_string_opt]}].
+ match_string_opt,select_on_integer]}].
init_per_suite(Config) ->
@@ -1225,6 +1225,20 @@ match_string_opt(Config) when is_list(Config) ->
do_match_string_opt({<<1>>,{v,V}}=T) ->
{x,V,T}.
+select_on_integer(Config) when is_list(Config) ->
+ 42 = do_select_on_integer(<<42>>),
+ <<"abc">> = do_select_on_integer(<<128,"abc">>),
+
+ {'EXIT',_} = (catch do_select_on_integer(<<0:1>>)),
+ {'EXIT',_} = (catch do_select_on_integer(<<1:1>>)),
+ {'EXIT',_} = (catch do_select_on_integer(<<0:1,0:15>>)),
+ ok.
+
+%% The ASN.1 compiler frequently generates code like this.
+do_select_on_integer(<<0:1,I:7>>) ->
+ I;
+do_select_on_integer(<<1:1,_:7,Bin/binary>>) ->
+ Bin.
check(F, R) ->
R = F().
diff --git a/lib/compiler/test/compile_SUITE.erl b/lib/compiler/test/compile_SUITE.erl
index cbdd9ce8cd..806cb58bab 100644
--- a/lib/compiler/test/compile_SUITE.erl
+++ b/lib/compiler/test/compile_SUITE.erl
@@ -330,6 +330,8 @@ do_file_listings(DataDir, PrivDir, [File|Files]) ->
do_listing(Simple, TargetDir, dlife, ".life"),
do_listing(Simple, TargetDir, dcg, ".codegen"),
do_listing(Simple, TargetDir, dblk, ".block"),
+ do_listing(Simple, TargetDir, dexcept, ".except"),
+ do_listing(Simple, TargetDir, dbs, ".bs"),
do_listing(Simple, TargetDir, dbool, ".bool"),
do_listing(Simple, TargetDir, dtype, ".type"),
do_listing(Simple, TargetDir, ddead, ".dead"),
diff --git a/lib/compiler/test/misc_SUITE.erl b/lib/compiler/test/misc_SUITE.erl
index 3582e055c8..b88abaf62d 100644
--- a/lib/compiler/test/misc_SUITE.erl
+++ b/lib/compiler/test/misc_SUITE.erl
@@ -208,6 +208,10 @@ silly_coverage(Config) when is_list(Config) ->
{label,2}|non_proper_list]}],99},
?line expect_error(fun() -> beam_block:module(BlockInput, []) end),
+ %% beam_bs
+ BsInput = BlockInput,
+ expect_error(fun() -> beam_bs:module(BsInput, []) end),
+
%% beam_type
TypeInput = {?MODULE,[{foo,0}],[],
[{function,foo,0,2,
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-09 22:46:51 +0000