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author | Björn Gustavsson <[email protected]> | 2016-05-23 08:40:23 +0200 |
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committer | Björn Gustavsson <[email protected]> | 2016-05-23 08:40:23 +0200 |
commit | d0554c760abc10f0c90348c8d3b63ca6110c6938 (patch) | |
tree | 06d2ce826e524951002883329291c1dfa9c6199f /lib/compiler/src/beam_type.erl | |
parent | de114bb8523486c0174eb763b939fbdb34aa9421 (diff) | |
parent | 69dd6018b7731becda651393b837639746aa63c7 (diff) | |
download | otp-d0554c760abc10f0c90348c8d3b63ca6110c6938.tar.gz otp-d0554c760abc10f0c90348c8d3b63ca6110c6938.tar.bz2 otp-d0554c760abc10f0c90348c8d3b63ca6110c6938.zip |
Merge branch 'bjorn/compiler/misc'
* bjorn/compiler/misc:
beam_bool_SUITE: Cover one more line
beam_utils_SUITE: Cover more lines in beam_utils
beam_reorder: Don't confuse beam_validator
beam_bool: Reject potentially unsafe optimization
v3_core: Don't depend on sys_core_fold for cleaning up
beam_type: Eliminate crash
beam_type: Correct handling of setelement/3
beam_validator: Handle cons literals better
beam_validator: Keep better track of tuple literals
Diffstat (limited to 'lib/compiler/src/beam_type.erl')
-rw-r--r-- | lib/compiler/src/beam_type.erl | 66 |
1 files changed, 52 insertions, 14 deletions
diff --git a/lib/compiler/src/beam_type.erl b/lib/compiler/src/beam_type.erl index 5076c5eb96..acaf3ede66 100644 --- a/lib/compiler/src/beam_type.erl +++ b/lib/compiler/src/beam_type.erl @@ -513,12 +513,23 @@ update({call_ext,Ar,{extfunc,math,Math,Ar}}, Ts) -> false -> tdb_kill_xregs(Ts) end; update({call_ext,3,{extfunc,erlang,setelement,3}}, Ts0) -> - Op = case tdb_find({x,1}, Ts0) of - error -> kill; - Info -> Info - end, - Ts1 = tdb_kill_xregs(Ts0), - tdb_update([{{x,0},Op}], Ts1); + Ts = tdb_kill_xregs(Ts0), + case tdb_find({x,1}, Ts0) of + {tuple,Sz,_}=T0 -> + T = case tdb_find({x,0}, Ts0) of + {integer,{I,I}} when I > 1 -> + %% First element is not changed. The result + %% will have the same type. + T0; + _ -> + %% Position is 1 or unknown. May change the + %% first element of the tuple. + {tuple,Sz,[]} + end, + tdb_update([{{x,0},T}], Ts); + _ -> + Ts + end; 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); @@ -748,7 +759,7 @@ checkerror_2(OrigIs) -> [{set,[],[],fcheckerror}|OrigIs]. %%% %%% {tuple,Size,First} means that the corresponding register contains a %%% tuple with *at least* Size elements. An tuple with unknown -%%% size is represented as {tuple,0}. First is either [] (meaning that +%%% size is represented as {tuple,0,[]}. First is either [] (meaning that %%% the tuple's first element is unknown) or [FirstElement] (the contents %%% of the first element). %%% @@ -785,21 +796,45 @@ tdb_copy({Tag,_}=S, D, Ts) when Tag =:= x; Tag =:= y -> error -> orddict:erase(D, Ts); Type -> orddict:store(D, Type, Ts) end; -tdb_copy(Literal, D, Ts) -> orddict:store(D, Literal, Ts). +tdb_copy(Literal, D, Ts) -> + Type = case Literal of + {atom,_} -> Literal; + {float,_} -> float; + {integer,Int} -> {integer,{Int,Int}}; + {literal,[_|_]} -> nonempty_list; + {literal,#{}} -> map; + {literal,Tuple} when tuple_size(Tuple) >= 1 -> + Lit = tag_literal(element(1, Tuple)), + {tuple,tuple_size(Tuple),[Lit]}; + _ -> term + end, + if + Type =:= term -> + orddict:erase(D, Ts); + true -> + verify_type(Type), + orddict:store(D, Type, Ts) + end. + +tag_literal(A) when is_atom(A) -> {atom,A}; +tag_literal(F) when is_float(F) -> {float,F}; +tag_literal(I) when is_integer(I) -> {integer,I}; +tag_literal([]) -> nil; +tag_literal(Lit) -> {literal,Lit}. %% tdb_update([UpdateOp], Db) -> NewDb %% UpdateOp = {Register,kill}|{Register,NewInfo} %% Updates a type database. If a 'kill' operation is given, the type %% information for that register will be removed from the database. %% A kill operation takes precedence over other operations for the same -%% register (i.e. [{{x,0},kill},{{x,0},{tuple,5}}] means that the +%% register (i.e. [{{x,0},kill},{{x,0},{tuple,5,[]}}] means that the %% the existing type information, if any, will be discarded, and the -%% the '{tuple,5}' information ignored. +%% the '{tuple,5,[]}' information ignored. %% %% If NewInfo information is given and there exists information about %% the register, the old and new type information will be merged. -%% For instance, {tuple,5} and {tuple,10} will be merged to produce -%% {tuple,10}. +%% For instance, {tuple,5,_} and {tuple,10,_} will be merged to produce +%% {tuple,10,_}. tdb_update(Uis0, Ts0) -> Uis1 = filter(fun ({{x,_},_Op}) -> true; @@ -810,7 +845,8 @@ tdb_update(Uis0, Ts0) -> tdb_update1([{Key,kill}|Ops], [{K,_Old}|_]=Db) when Key < K -> tdb_update1(remove_key(Key, Ops), Db); -tdb_update1([{Key,_New}=New|Ops], [{K,_Old}|_]=Db) when Key < K -> +tdb_update1([{Key,Type}=New|Ops], [{K,_Old}|_]=Db) when Key < K -> + verify_type(Type), [New|tdb_update1(Ops, Db)]; tdb_update1([{Key,kill}|Ops], [{Key,_}|Db]) -> tdb_update1(remove_key(Key, Ops), Db); @@ -820,7 +856,8 @@ tdb_update1([{_,_}|_]=Ops, [Old|Db]) -> [Old|tdb_update1(Ops, Db)]; tdb_update1([{Key,kill}|Ops], []) -> tdb_update1(remove_key(Key, Ops), []); -tdb_update1([{_,_}=New|Ops], []) -> +tdb_update1([{_,Type}=New|Ops], []) -> + verify_type(Type), [New|tdb_update1(Ops, [])]; tdb_update1([], Db) -> Db. @@ -855,6 +892,7 @@ merge_type_info(NewType, _) -> verify_type(NewType), NewType. +verify_type({atom,_}) -> ok; verify_type(boolean) -> ok; verify_type(integer) -> ok; verify_type({integer,{Min,Max}}) |