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-rw-r--r--lib/compiler/src/v3_core.erl75
-rw-r--r--lib/compiler/src/v3_kernel.erl106
2 files changed, 82 insertions, 99 deletions
diff --git a/lib/compiler/src/v3_core.erl b/lib/compiler/src/v3_core.erl
index 1d5eb85a1c..a9b54005d1 100644
--- a/lib/compiler/src/v3_core.erl
+++ b/lib/compiler/src/v3_core.erl
@@ -536,7 +536,7 @@ expr({tuple,L,Es0}, St0) ->
A = record_anno(L, St1),
{annotate_tuple(A, Es1, St1),Eps,St1};
expr({map,L,Es0}, St0) ->
- map_build_pair_chain(#c_literal{val=#{}},Es0,lineno_anno(L,St0),St0);
+ map_build_pairs(#c_literal{val=#{}}, Es0, lineno_anno(L, St0), St0);
expr({map,L,M0,Es0}, St0) ->
try expr_map(M0,Es0,lineno_anno(L, St0),St0) of
{_,_,_}=Res -> Res
@@ -779,66 +779,35 @@ expr_map(M0,Es0,A,St0) ->
Fc = fail_clause([Fpat], A, #c_literal{val=badarg}),
{#icase{anno=#a{anno=A},args=[M1],clauses=Cs,fc=Fc},Mps,St3};
{_,_} ->
- {M2,Eps,St2} = map_build_pair_chain(M1,Es0,A,St1),
+ {M2,Eps,St2} = map_build_pairs(M1, Es0, A, St1),
{M2,Mps++Eps,St2}
end;
false -> throw({bad_map,bad_map})
end.
-%% Group continuous literal blocks and single variables, i.e.
-%% M0#{ a := 1, b := V1, K1 := V2, K2 := 42}
-%% becomes equivalent to
-%% M1 = M0#{ a := 1, b := V1 },
-%% M2 = M1#{ K1 := V1 },
-%% M3 = M2#{ K2 := 42 }
-
-map_build_pair_chain(M,Es,A,St) ->
- %% hack, remove iset if only literal
- case map_build_pair_chain(M,Es,A,St,[]) of
- {_,[#iset{arg=#c_literal{}=Val}],St1} -> {Val,[],St1};
- Normal -> Normal
+map_build_pairs(Map0, Es0, Ann, St0) ->
+ {Es,Pre,St1} = map_build_pairs_1(Es0, St0),
+ case ann_c_map(Ann, Map0, Es) of
+ #c_literal{}=Map ->
+ {Map,[],St1};
+ #c_map{}=Map ->
+ {Var,St2} = new_var(St1),
+ {Var,Pre++[#iset{var=Var,arg=Map}],St2}
end.
-map_build_pair_chain(M0,[],_,St,Mps) ->
- {M0,Mps,St};
-map_build_pair_chain(M0,Es0,A,St0,Mps) ->
- % group continuous literal blocks
- % Anno = #a{anno=[compiler_generated]},
- % order is important, we need to reverse the literals
- case map_pair_block(Es0,[],[],St0) of
- {{CesL,EspL},{[],[]},Es1,St1} ->
- {MVar,St2} = new_var(St1),
- Pre = [#iset{var=MVar, arg=ann_c_map(A,M0,reverse(CesL))}],
- map_build_pair_chain(MVar,Es1,A,St2,Mps++EspL++Pre);
- {{[],[]},{CesV,EspV},Es1,St1} ->
- {MVar,St2} = new_var(St1),
- Pre = [#iset{var=MVar, arg=#c_map{arg=M0,es=CesV, anno=A}}],
- map_build_pair_chain(MVar,Es1,A,St2,Mps ++ EspV++Pre);
- {{CesL,EspL},{CesV,EspV},Es1,St1} ->
- {MVarL,St2} = new_var(St1),
- {MVarV,St3} = new_var(St2),
- Pre = [#iset{var=MVarL, arg=ann_c_map(A,M0,reverse(CesL))},
- #iset{var=MVarV, arg=#c_map{arg=MVarL,es=CesV,anno=A}}],
- map_build_pair_chain(MVarV,Es1,A,St3,Mps++EspL++EspV++Pre)
- end.
-
-map_pair_block([{Op,L,K0,V0}|Es],Ces,Esp,St0) ->
- {K,Ep0,St1} = safe(K0, St0),
- {V,Ep1,St2} = safe(V0, St1),
- A = lineno_anno(L, St2),
- Pair0 = map_op_to_c_map_pair(Op),
- Pair1 = Pair0#c_map_pair{anno=A,key=K,val=V},
- case cerl:is_literal(K) of
- true ->
- map_pair_block(Es,[Pair1|Ces],Ep0 ++ Ep1 ++ Esp,St2);
- false ->
- {{Ces,Esp},{[Pair1],Ep0++Ep1},Es,St2}
- end;
-map_pair_block([],Ces,Esp,St) ->
- {{Ces,Esp},{[],[]},[],St}.
+map_build_pairs_1([{Op0,L,K0,V0}|Es], St0) ->
+ {K,Pre0,St1} = safe(K0, St0),
+ {V,Pre1,St2} = safe(V0, St1),
+ {Pairs,Pre2,St3} = map_build_pairs_1(Es, St2),
+ As = lineno_anno(L, St3),
+ Op = map_op(Op0),
+ Pair = cerl:ann_c_map_pair(As, Op, K, V),
+ {[Pair|Pairs],Pre0++Pre1++Pre2,St3};
+map_build_pairs_1([], St) ->
+ {[],[],St}.
-map_op_to_c_map_pair(map_field_assoc) -> #c_map_pair{op=#c_literal{val=assoc}};
-map_op_to_c_map_pair(map_field_exact) -> #c_map_pair{op=#c_literal{val=exact}}.
+map_op(map_field_assoc) -> #c_literal{val=assoc};
+map_op(map_field_exact) -> #c_literal{val=exact}.
is_valid_map_src(#c_literal{val = M}) when is_map(M) -> true;
is_valid_map_src(#c_var{}) -> true;
diff --git a/lib/compiler/src/v3_kernel.erl b/lib/compiler/src/v3_kernel.erl
index 6504351c02..72e7a39333 100644
--- a/lib/compiler/src/v3_kernel.erl
+++ b/lib/compiler/src/v3_kernel.erl
@@ -521,62 +521,76 @@ is_valid_map_src(#k_var{}) -> true;
is_valid_map_src(_) -> false.
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],
+ %% 1. Force variables.
+ %% 2. Group adjacent pairs with literal keys.
+ %% 3. Within each such group, remove multiple assignments to the same key.
+ %% 4. Partition each group according to operator ('=>' and ':=').
+ 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,Eps1,Sti1} = atomic(K0, Sub, Sti0),
{V,Eps2,Sti2} = atomic(V0, Sub, Sti1),
{[{Op,K,V}|Ops],Eps1 ++ Eps2 ++ 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},Esp ++ Em,St2}
-
+ map_split_pairs_1(A, Var, Pairs, Esp, St1).
+
+map_split_pairs_1(A, Map0, [{Op,Key,Val}|Pairs1]=Pairs0, Esp0, St0) ->
+ {Map1,Em,St1} = force_atomic(Map0, St0),
+ case Key of
+ #k_var{} ->
+ %% Don't combine variable keys with other keys.
+ Kes = [#k_map_pair{key=Key,val=Val}],
+ Map = #k_map{anno=A,op=Op,var=Map1,es=Kes},
+ map_split_pairs_1(A, Map, Pairs1, Esp0 ++ Em, St1);
+ _ ->
+ %% Literal key. Split off all literal keys.
+ {L,Pairs} = splitwith(fun({_,#k_var{},_}) -> false;
+ ({_,_,_}) -> true
+ end, Pairs0),
+ {Map,Esp,St2} = map_group_pairs(A, Map1, L, Esp0 ++ Em, St1),
+ map_split_pairs_1(A, Map, Pairs, Esp, St2)
+ end;
+map_split_pairs_1(_, Map, [], Esp, St0) ->
+ {Map,Esp,St0}.
+
+map_group_pairs(A, Var, Pairs0, Esp, St0) ->
+ Pairs = map_remove_dup_keys(Pairs0),
+ Assoc = [#k_map_pair{key=K,val=V} || {_,{assoc,K,V}} <- Pairs],
+ Exact = [#k_map_pair{key=K,val=V} || {_,{exact,K,V}} <- Pairs],
+ case {Assoc,Exact} of
+ {[_|_],[]} ->
+ {#k_map{anno=A,op=assoc,var=Var,es=Assoc},Esp,St0};
+ {[],[_|_]} ->
+ {#k_map{anno=A,op=exact,var=Var,es=Exact},Esp,St0};
+ {[_|_],[_|_]} ->
+ Map = #k_map{anno=A,op=assoc,var=Var,es=Assoc},
+ {Mvar,Em,St1} = force_atomic(Map, St0),
+ {#k_map{anno=A,op=exact,var=Mvar,es=Exact},Esp ++ Em,St1}
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_remove_dup_keys(Es) ->
+ dict:to_list(map_remove_dup_keys(Es, dict:new())).
-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).
+map_remove_dup_keys([{assoc,K0,V}|Es0],Used0) ->
+ K = map_key_clean(K0),
+ Op = case dict:find(K, Used0) of
+ {ok,{exact,_,_}} -> exact;
+ _ -> assoc
+ end,
+ Used1 = dict:store(K, {Op,K0,V}, Used0),
+ map_remove_dup_keys(Es0, Used1);
+map_remove_dup_keys([{exact,K0,V}|Es0],Used0) ->
+ K = map_key_clean(K0),
+ Op = case dict:find(K, Used0) of
+ {ok,{assoc,_,_}} -> assoc;
+ _ -> exact
+ end,
+ Used1 = dict:store(K, {Op,K0,V}, Used0),
+ map_remove_dup_keys(Es0, Used1);
+map_remove_dup_keys([], Used) -> Used.
-%% Be explicit instead of using set_kanno(K,[])
+%% Be explicit instead of using set_kanno(K, []).
map_key_clean(#k_var{name=V}) -> {var,V};
map_key_clean(#k_literal{val=V}) -> {lit,V};
map_key_clean(#k_int{val=V}) -> {lit,V};
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-03 15:20:01 +0000