diff options
Diffstat (limited to 'lib/compiler/src/v3_codegen.erl')
| -rw-r--r-- | lib/compiler/src/v3_codegen.erl | 77 |
1 files changed, 57 insertions, 20 deletions
diff --git a/lib/compiler/src/v3_codegen.erl b/lib/compiler/src/v3_codegen.erl index 47c1567f10..ee5bafbc5c 100644 --- a/lib/compiler/src/v3_codegen.erl +++ b/lib/compiler/src/v3_codegen.erl @@ -654,6 +654,8 @@ select_cg(#l{ke={type_clause,bin_end,[S]}}, {var,V}, Tf, _Vf, Bef, St) -> select_bin_end(S, V, Tf, Bef, St); select_cg(#l{ke={type_clause,map,S}}, {var,V}, Tf, Vf, Bef, St) -> select_map(S, V, Tf, Vf, Bef, St); +select_cg(#l{ke={type_clause,literal,S}}, {var,V}, Tf, Vf, Bef, St) -> + select_literal(S, V, Tf, Vf, Bef, St); select_cg(#l{ke={type_clause,Type,Scs}}, {var,V}, Tf, Vf, Bef, St0) -> {Vis,{Aft,St1}} = mapfoldl(fun (S, {Int,Sta}) -> @@ -695,6 +697,15 @@ add_vls([V|Vs], Lbl, Acc) -> add_vls(Vs, Lbl, [V, {f,Lbl}|Acc]); add_vls([], _, Acc) -> Acc. +select_literal(S, V, Tf, Vf, Bef, St) -> + Reg = fetch_var(V, Bef), + F = fun(ValClause, Fail, St0) -> + {Val,Is,Aft,St1} = select_val(ValClause, V, Vf, Bef, St0), + Test = {test,is_eq_exact,{f,Fail},[Reg,{literal,Val}]}, + {[Test|Is],Aft,St1} + end, + match_fmf(F, Tf, St, S). + select_cons(#l{ke={val_clause,{cons,Es},B},i=I,vdb=Vdb}, V, Tf, Vf, Bef, St0) -> {Eis,Int,St1} = select_extract_cons(V, Es, I, Vdb, Bef, St0), {Bis,Aft,St2} = match_cg(B, Vf, Int, St1), @@ -884,12 +895,19 @@ select_extract_bin([{var,Hd}], Size, Unit, binary, Flags, Vf, %% calculcated by v3_life is too conservative to be useful for this purpose.) %% 'true' means that the code that follows will definitely not use the context %% again (because it is a block, not guard or matching code); 'false' that we -%% are not sure (there is either a guard, or more matching, either which may -%% reference the context again). - -is_context_unused(#l{ke=Ke}) -> is_context_unused(Ke); -is_context_unused({block,_}) -> true; -is_context_unused(_) -> false. +%% are not sure (there could be more matching). + +is_context_unused(#l{ke=Ke}) -> + is_context_unused(Ke); +is_context_unused({alt,_First,Then}) -> + %% {alt,First,Then} can be used for different purposes. If the Then part + %% is a block, it means that matching has finished and is used for a guard + %% to choose between the matched clauses. + is_context_unused(Then); +is_context_unused({block,_}) -> + true; +is_context_unused(_) -> + false. select_bin_end(#l{ke={val_clause,{bin_end,Ctx},B}}, Ivar, Tf, Bef, St0) -> @@ -1811,22 +1829,41 @@ cg_gen_binsize([], _, _, _, _, Acc) -> Acc. %% cg_bin_opt(Code0) -> Code %% Optimize the size calculations for binary construction. -cg_bin_opt([{move,Size,D},{bs_append,Fail,D,Extra,Regs,U,Bin,Flags,D}|Is]) -> - cg_bin_opt([{bs_append,Fail,Size,Extra,Regs,U,Bin,Flags,D}|Is]); -cg_bin_opt([{move,Size,D},{bs_private_append,Fail,D,U,Bin,Flags,D}|Is]) -> - cg_bin_opt([{bs_private_append,Fail,Size,U,Bin,Flags,D}|Is]); -cg_bin_opt([{move,{integer,0},D},{bs_add,_,[D,{integer,_}=S,1],Dst}|Is]) -> - cg_bin_opt([{move,S,Dst}|Is]); -cg_bin_opt([{move,{integer,0},D},{bs_add,Fail,[D,S,U],Dst}|Is]) -> - cg_bin_opt([{bs_add,Fail,[{integer,0},S,U],Dst}|Is]); -cg_bin_opt([{move,{integer,Bytes},D},{Op,Fail,D,Extra,Regs,Flags,D}|Is]) +cg_bin_opt([{move,S1,{x,X}=D},{gc_bif,Op,Fail,Live0,As,Dst}|Is]) -> + Live = if + X + 1 =:= Live0 -> X; + true -> Live0 + end, + [{gc_bif,Op,Fail,Live,As,D}|cg_bin_opt([{move,S1,Dst}|Is])]; +cg_bin_opt([{move,_,_}=I1,{Op,_,_,_}=I2|Is]) + when Op =:= bs_utf8_size orelse Op =:= bs_utf16_size -> + [I2|cg_bin_opt([I1|Is])]; +cg_bin_opt([{bs_add,_,[{integer,0},Src,1],Dst}|Is]) -> + cg_bin_opt_1([{move,Src,Dst}|Is]); +cg_bin_opt([{bs_add,_,[Src,{integer,0},_],Dst}|Is]) -> + cg_bin_opt_1([{move,Src,Dst}|Is]); +cg_bin_opt(Is) -> + cg_bin_opt_1(Is). + +cg_bin_opt_1([{move,Size,D},{bs_append,Fail,D,Extra,Regs,U,Bin,Flags,D}|Is]) -> + [{bs_append,Fail,Size,Extra,Regs,U,Bin,Flags,D}|cg_bin_opt(Is)]; +cg_bin_opt_1([{move,Size,D},{bs_private_append,Fail,D,U,Bin,Flags,D}|Is]) -> + [{bs_private_append,Fail,Size,U,Bin,Flags,D}|cg_bin_opt(Is)]; +cg_bin_opt_1([{move,Size,D},{Op,Fail,D,Extra,Regs,Flags,D}|Is]) when Op =:= bs_init2; Op =:= bs_init_bits -> - cg_bin_opt([{Op,Fail,Bytes,Extra,Regs,Flags,D}|Is]); -cg_bin_opt([{move,Src1,Dst},{bs_add,Fail,[Dst,Src2,U],Dst}|Is]) -> - cg_bin_opt([{bs_add,Fail,[Src1,Src2,U],Dst}|Is]); -cg_bin_opt([I|Is]) -> + Bytes = case Size of + {integer,Int} -> Int; + _ -> Size + end, + [{Op,Fail,Bytes,Extra,Regs,Flags,D}|cg_bin_opt(Is)]; +cg_bin_opt_1([{move,S1,D},{bs_add,Fail,[D,S2,U],Dst}|Is]) -> + cg_bin_opt([{bs_add,Fail,[S1,S2,U],Dst}|Is]); +cg_bin_opt_1([{move,S1,D},{bs_add,Fail,[S2,D,U],Dst}|Is]) -> + cg_bin_opt([{bs_add,Fail,[S2,S1,U],Dst}|Is]); +cg_bin_opt_1([I|Is]) -> [I|cg_bin_opt(Is)]; -cg_bin_opt([]) -> []. +cg_bin_opt_1([]) -> + []. cg_bin_put({bin_seg,[],S0,U,T,Fs,[E0,Next]}, Fail, Bef) -> S1 = cg_reg_arg(S0, Bef), |