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-rw-r--r--lib/compiler/src/v3_kernel.erl153
1 files changed, 134 insertions, 19 deletions
diff --git a/lib/compiler/src/v3_kernel.erl b/lib/compiler/src/v3_kernel.erl
index 65f1251099..5675572092 100644
--- a/lib/compiler/src/v3_kernel.erl
+++ b/lib/compiler/src/v3_kernel.erl
@@ -81,7 +81,7 @@
-export([module/2,format_error/1]).
-import(lists, [map/2,foldl/3,foldr/3,mapfoldl/3,splitwith/2,member/2,
- keymember/3,keyfind/3,partition/2]).
+ keymember/3,keyfind/3,partition/2,droplast/1,last/1]).
-import(ordsets, [add_element/2,del_element/2,union/2,union/1,subtract/2]).
-import(cerl, [c_tuple/1]).
@@ -272,6 +272,9 @@ expr(#c_cons{anno=A,hd=Ch,tl=Ct}, Sub, St0) ->
expr(#c_tuple{anno=A,es=Ces}, Sub, St0) ->
{Kes,Ep,St1} = atomic_list(Ces, Sub, St0),
{#k_tuple{anno=A,es=Kes},Ep,St1};
+expr(#c_map{anno=A,var=Var0,es=Ces}, Sub, St0) ->
+ {Var,[],St1} = expr(Var0, Sub, St0),
+ map_split_pairs(A, Var, Ces, Sub, St1);
expr(#c_binary{anno=A,segments=Cv}, Sub, St0) ->
try atomic_bin(Cv, Sub, St0) of
{Kv,Ep,St1} ->
@@ -347,7 +350,7 @@ expr(#c_case{arg=Ca,clauses=Ccs}, Sub, St0) ->
{Kvs,Pv,St2} = match_vars(Ka, St1), %Must have variables here!
{Km,St3} = kmatch(Kvs, Ccs, Sub, St2),
Match = flatten_seq(build_match(Kvs, Km)),
- {last(Match),Pa ++ Pv ++ first(Match),St3};
+ {last(Match),Pa ++ Pv ++ droplast(Match),St3};
expr(#c_receive{anno=A,clauses=Ccs0,timeout=Ce,action=Ca}, Sub, St0) ->
{Ke,Pe,St1} = atomic(Ce, Sub, St0), %Force this to be atomic!
{Rvar,St2} = new_var(St1),
@@ -493,6 +496,71 @@ translate_match_fail_1(Anno, As, Sub, #kern{ff=FF}) ->
translate_fc(Args) ->
[#c_literal{val=function_clause},make_list(Args)].
+map_split_pairs(A, Var, Ces, Sub, St0) ->
+ %% two steps
+ %% 1. force variables
+ %% 2. remove multiples
+ Pairs0 = [{Op,K,V} || #c_map_pair{op=#c_literal{val=Op},key=K,val=V} <- Ces],
+ {Pairs,Esp,St1} = foldr(fun
+ ({Op,K0,V0}, {Ops,Espi,Sti0}) when Op =:= assoc; Op =:= exact ->
+ {K,[],Sti1} = expr(K0, Sub, Sti0),
+ {V,Ep,Sti2} = atomic(V0, Sub, Sti1),
+ {[{Op,K,V}|Ops],Ep ++ Espi,Sti2}
+ end, {[],[],St0}, Pairs0),
+
+ case map_group_pairs(Pairs) of
+ {Assoc,[]} ->
+ Kes = [#k_map_pair{key=K,val=V}||{_,{assoc,K,V}} <- Assoc],
+ {#k_map{anno=A,op=assoc,var=Var,es=Kes},Esp,St1};
+ {[],Exact} ->
+ Kes = [#k_map_pair{key=K,val=V}||{_,{exact,K,V}} <- Exact],
+ {#k_map{anno=A,op=exact,var=Var,es=Kes},Esp,St1};
+ {Assoc,Exact} ->
+ Kes1 = [#k_map_pair{key=K,val=V}||{_,{assoc,K,V}} <- Assoc],
+ {Mvar,Em,St2} = force_atomic(#k_map{anno=A,op=assoc,var=Var,es=Kes1},St1),
+ Kes2 = [#k_map_pair{key=K,val=V}||{_,{exact,K,V}} <- Exact],
+ {#k_map{anno=A,op=exact,var=Mvar,es=Kes2},Em ++ Esp,St2}
+
+ end.
+
+%% Group map by Assoc operations and Exact operations
+
+map_group_pairs(Es) ->
+ Groups = dict:to_list(map_group_pairs(Es,dict:new())),
+ partition(fun({_,{Op,_,_}}) -> Op =:= assoc end, Groups).
+
+map_group_pairs([{assoc,K,V}|Es0],Used0) ->
+ Used1 = case map_key_is_used(K,Used0) of
+ {ok, {assoc,_,_}} -> map_key_set_used(K,{assoc,K,V},Used0);
+ {ok, {exact,_,_}} -> map_key_set_used(K,{exact,K,V},Used0);
+ _ -> map_key_set_used(K,{assoc,K,V},Used0)
+ end,
+ map_group_pairs(Es0,Used1);
+map_group_pairs([{exact,K,V}|Es0],Used0) ->
+ Used1 = case map_key_is_used(K,Used0) of
+ {ok, {assoc,_,_}} -> map_key_set_used(K,{assoc,K,V},Used0);
+ {ok, {exact,_,_}} -> map_key_set_used(K,{exact,K,V},Used0);
+ _ -> map_key_set_used(K,{exact,K,V},Used0)
+ end,
+ map_group_pairs(Es0,Used1);
+map_group_pairs([],Used) ->
+ Used.
+
+map_key_set_used(K,How,Used) ->
+ dict:store(map_key_clean(K),How,Used).
+
+map_key_is_used(K,Used) ->
+ dict:find(map_key_clean(K),Used).
+
+%% Be explicit instead of using set_kanno(K,[])
+map_key_clean(#k_literal{val=V}) -> {k_literal,V};
+map_key_clean(#k_int{val=V}) -> {k_int,V};
+map_key_clean(#k_float{val=V}) -> {k_float,V};
+map_key_clean(#k_atom{val=V}) -> {k_atom,V};
+map_key_clean(#k_nil{}) -> k_nil;
+map_key_clean(#k_var{name=V}) -> {k_var,V}.
+
+
%% call_type(Module, Function, Arity) -> call | bif | apply | error.
%% Classify the call.
call_type(#c_literal{val=M}, #c_literal{val=F}, Ar) when is_atom(M), is_atom(F) ->
@@ -648,6 +716,9 @@ pattern(#c_cons{anno=A,hd=Ch,tl=Ct}, Isub, Osub0, St0) ->
pattern(#c_tuple{anno=A,es=Ces}, Isub, Osub0, St0) ->
{Kes,Osub1,St1} = pattern_list(Ces, Isub, Osub0, St0),
{#k_tuple{anno=A,es=Kes},Osub1,St1};
+pattern(#c_map{anno=A,es=Ces}, Isub, Osub0, St0) ->
+ {Kes,Osub1,St1} = pattern_map_pairs(Ces, Isub, Osub0, St0),
+ {#k_map{anno=A,op=exact,es=Kes},Osub1,St1};
pattern(#c_binary{anno=A,segments=Cv}, Isub, Osub0, St0) ->
{Kv,Osub1,St1} = pattern_bin(Cv, Isub, Osub0, St0),
{#k_binary{anno=A,segs=Kv},Osub1,St1};
@@ -662,6 +733,25 @@ flatten_alias(#c_alias{var=V,pat=P}) ->
{[V|Vs],Pat};
flatten_alias(Pat) -> {[],Pat}.
+pattern_map_pairs(Ces0, Isub, Osub0, St0) ->
+ %% It is assumed that all core keys are literals
+ %% It is later assumed that these keys are term sorted
+ %% so we need to sort them here
+ Ces1 = lists:sort(fun
+ (#c_map_pair{key=CkA},#c_map_pair{key=CkB}) ->
+ A = core_lib:literal_value(CkA),
+ B = core_lib:literal_value(CkB),
+ erts_internal:cmp_term(A,B) < 0
+ end, Ces0),
+ %% pattern the pair keys and values as normal
+ {Kes,{Osub1,St1}} = lists:mapfoldl(fun
+ (#c_map_pair{anno=A,key=Ck,val=Cv},{Osubi0,Sti0}) ->
+ {Kk,Osubi1,Sti1} = pattern(Ck, Isub, Osubi0, Sti0),
+ {Kv,Osubi2,Sti2} = pattern(Cv, Isub, Osubi1, Sti1),
+ {#k_map_pair{anno=A,key=Kk,val=Kv},{Osubi2,Sti2}}
+ end, {Osub0, St0}, Ces1),
+ {Kes,Osub1,St1}.
+
pattern_bin(Es, Isub, Osub0, St0) ->
{Kbin,{_,Osub},St} = pattern_bin_1(Es, Isub, Osub0, St0),
{Kbin,Osub,St}.
@@ -826,15 +916,6 @@ foldr2(Fun, Acc0, [E1|L1], [E2|L2]) ->
foldr2(Fun, Acc1, L1, L2);
foldr2(_, Acc, [], []) -> Acc.
-%% first([A]) -> [A].
-%% last([A]) -> A.
-
-last([L]) -> L;
-last([_|T]) -> last(T).
-
-first([_]) -> [];
-first([H|T]) -> [H|first(T)].
-
%% This code implements the algorithm for an optimizing compiler for
%% pattern matching given "The Implementation of Functional
%% Programming Languages" by Simon Peyton Jones. The code is much
@@ -1015,7 +1096,8 @@ match_con_1([U|_Us] = L, Cs, Def, St0) ->
%% Extract clauses for different constructors (types).
%%ok = io:format("match_con ~p~n", [Cs]),
Ttcs = select_types([k_binary], Cs) ++ select_bin_con(Cs) ++
- select_types([k_cons,k_tuple,k_atom,k_float,k_int,k_nil,k_literal], Cs),
+ select_types([k_cons,k_tuple,k_map,k_atom,k_float,k_int,
+ k_nil,k_literal], Cs),
%%ok = io:format("ttcs = ~p~n", [Ttcs]),
{Scs,St1} =
mapfoldl(fun ({T,Tcs}, St) ->
@@ -1251,10 +1333,9 @@ group_value(k_cons, Cs) -> [Cs]; %These are single valued
group_value(k_nil, Cs) -> [Cs];
group_value(k_binary, Cs) -> [Cs];
group_value(k_bin_end, Cs) -> [Cs];
-group_value(k_bin_seg, Cs) ->
- group_bin_seg(Cs);
-group_value(k_bin_int, Cs) ->
- [Cs];
+group_value(k_bin_seg, Cs) -> group_bin_seg(Cs);
+group_value(k_bin_int, Cs) -> [Cs];
+group_value(k_map, Cs) -> group_map(Cs);
group_value(_, Cs) ->
%% group_value(Cs).
Cd = foldl(fun (C, Gcs0) -> dict:append(clause_val(C), C, Gcs0) end,
@@ -1267,6 +1348,12 @@ group_bin_seg([C1|Cs]) ->
[[C1|More]|group_bin_seg(Rest)];
group_bin_seg([]) -> [].
+group_map([C1|Cs]) ->
+ V1 = clause_val(C1),
+ {More,Rest} = splitwith(fun (C) -> clause_val(C) =:= V1 end, Cs),
+ [[C1|More]|group_map(Rest)];
+group_map([]) -> [].
+
%% Profiling shows that this quadratic implementation account for a big amount
%% of the execution time if there are many values.
% group_value([C|Cs]) ->
@@ -1315,6 +1402,13 @@ get_match(#k_bin_int{}=BinInt, St0) ->
get_match(#k_tuple{es=Es}, St0) ->
{Mes,St1} = new_vars(length(Es), St0),
{#k_tuple{es=Mes},Mes,St1};
+get_match(#k_map{op=exact,es=Es0}, St0) ->
+ {Mes,St1} = new_vars(length(Es0), St0),
+ {Es,_} = mapfoldl(fun
+ (#k_map_pair{}=Pair, [V|Vs]) ->
+ {Pair#k_map_pair{val=V},Vs}
+ end, Mes, Es0),
+ {#k_map{op=exact,es=Es},Mes,St1};
get_match(M, St) ->
{M,[],St}.
@@ -1331,7 +1425,11 @@ new_clauses(Cs0, U, St) ->
[S,N|As];
#k_bin_int{next=N} ->
[N|As];
- _Other -> As
+ #k_map{op=exact,es=Es} ->
+ Vals = [V || #k_map_pair{val=V} <- Es],
+ Vals ++ As;
+ _Other ->
+ As
end,
Vs = arg_alias(Arg),
Osub1 = foldl(fun (#k_var{name=V}, Acc) ->
@@ -1406,6 +1504,7 @@ arg_con(Arg) ->
#k_nil{} -> k_nil;
#k_cons{} -> k_cons;
#k_tuple{} -> k_tuple;
+ #k_map{} -> k_map;
#k_binary{} -> k_binary;
#k_bin_end{} -> k_bin_end;
#k_bin_seg{} -> k_bin_seg;
@@ -1426,7 +1525,15 @@ arg_val(Arg, C) ->
{#k_var{name=get_vsub(V, Isub)},U,T,Fs};
_ ->
{set_kanno(S, []),U,T,Fs}
- end
+ end;
+ #k_map{op=exact,es=Es} ->
+ Keys = [begin
+ #k_map_pair{key=#k_literal{val=Key}} = Pair,
+ Key
+ end || Pair <- Es],
+ %% multiple keys may have the same name
+ %% do not use ordsets
+ lists:sort(fun(A,B) -> erts_internal:cmp_term(A,B) < 0 end, Keys)
end.
%% ubody_used_vars(Expr, State) -> [UsedVar]
@@ -1795,6 +1902,10 @@ lit_vars(#k_atom{}) -> [];
lit_vars(#k_nil{}) -> [];
lit_vars(#k_cons{hd=H,tl=T}) ->
union(lit_vars(H), lit_vars(T));
+lit_vars(#k_map{var=Var,es=Es}) ->
+ lit_list_vars([Var|Es]);
+lit_vars(#k_map_pair{key=K,val=V}) ->
+ union(lit_vars(K), lit_vars(V));
lit_vars(#k_binary{segs=V}) -> lit_vars(V);
lit_vars(#k_bin_end{}) -> [];
lit_vars(#k_bin_seg{size=Size,seg=S,next=N}) ->
@@ -1830,7 +1941,11 @@ pat_vars(#k_bin_int{size=Size}) ->
{U,[]};
pat_vars(#k_bin_end{}) -> {[],[]};
pat_vars(#k_tuple{es=Es}) ->
- pat_list_vars(Es).
+ pat_list_vars(Es);
+pat_vars(#k_map{es=Es}) ->
+ pat_list_vars(Es);
+pat_vars(#k_map_pair{val=V}) ->
+ pat_vars(V).
pat_list_vars(Ps) ->
foldl(fun (P, {Used0,New0}) ->
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-11 22:47:55 +0000