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-rw-r--r--lib/compiler/src/beam_except.erl6
-rw-r--r--lib/compiler/src/sys_core_fold.erl153
-rw-r--r--lib/compiler/test/warnings_SUITE.erl14
3 files changed, 25 insertions, 148 deletions
diff --git a/lib/compiler/src/beam_except.erl b/lib/compiler/src/beam_except.erl
index 09925b2872..28c89782c9 100644
--- a/lib/compiler/src/beam_except.erl
+++ b/lib/compiler/src/beam_except.erl
@@ -225,7 +225,11 @@ moves_from_stack(nil, I, Acc) ->
{reverse(Acc),I};
moves_from_stack({literal,[H|T]}, I, Acc) ->
Cons = {cons,tag_literal(H),tag_literal(T)},
- moves_from_stack(Cons, I, Acc).
+ moves_from_stack(Cons, I, Acc);
+moves_from_stack(_, _, _) ->
+ %% Not understood. Give up.
+ {[],-1}.
+
get_reg(R, Regs) ->
case Regs of
diff --git a/lib/compiler/src/sys_core_fold.erl b/lib/compiler/src/sys_core_fold.erl
index 43c99be982..7e219da0af 100644
--- a/lib/compiler/src/sys_core_fold.erl
+++ b/lib/compiler/src/sys_core_fold.erl
@@ -961,18 +961,12 @@ fold_lit_args(Call, Module, Name, Args0) ->
%%
fold_non_lit_args(Call, erlang, is_boolean, [Arg], Sub) ->
eval_is_boolean(Call, Arg, Sub);
-fold_non_lit_args(Call, erlang, element, [Arg1,Arg2], Sub) ->
- eval_element(Call, Arg1, Arg2, Sub);
fold_non_lit_args(Call, erlang, length, [Arg], _) ->
eval_length(Call, Arg);
fold_non_lit_args(Call, erlang, '++', [Arg1,Arg2], _) ->
eval_append(Call, Arg1, Arg2);
fold_non_lit_args(Call, lists, append, [Arg1,Arg2], _) ->
eval_append(Call, Arg1, Arg2);
-fold_non_lit_args(Call, erlang, setelement, [Arg1,Arg2,Arg3], _) ->
- eval_setelement(Call, Arg1, Arg2, Arg3);
-fold_non_lit_args(Call, erlang, is_record, [Arg1,Arg2,Arg3], Sub) ->
- eval_is_record(Call, Arg1, Arg2, Arg3, Sub);
fold_non_lit_args(Call, erlang, is_function, [Arg1], Sub) ->
eval_is_function_1(Call, Arg1, Sub);
fold_non_lit_args(Call, erlang, is_function, [Arg1,Arg2], Sub) ->
@@ -1141,96 +1135,6 @@ eval_append(Call, #c_cons{anno=Anno,hd=H,tl=T}, List) ->
eval_append(Call, X, Y) ->
Call#c_call{args=[X,Y]}. %Rebuild call arguments.
-%% eval_element(Call, Pos, Tuple, Types) -> Val.
-%% Evaluates element/2 if the position Pos is a literal and
-%% the shape of the tuple Tuple is known.
-%%
-eval_element(Call, #c_literal{val=Pos}, Tuple, Types)
- when is_integer(Pos) ->
- case get_type(Tuple, Types) of
- none ->
- Call;
- Type ->
- Es = case cerl:is_c_tuple(Type) of
- false -> [];
- true -> cerl:tuple_es(Type)
- end,
- if
- 1 =< Pos, Pos =< length(Es) ->
- El = lists:nth(Pos, Es),
- try
- cerl:set_ann(pat_to_expr(El), [compiler_generated])
- catch
- throw:impossible ->
- Call
- end;
- true ->
- %% Index outside tuple or not a tuple.
- eval_failure(Call, badarg)
- end
- end;
-eval_element(Call, Pos, Tuple, Sub) ->
- case is_int_type(Pos, Sub) =:= no orelse
- is_tuple_type(Tuple, Sub) =:= no of
- true ->
- eval_failure(Call, badarg);
- false ->
- Call
- end.
-
-%% eval_is_record(Call, Var, Tag, Size, Types) -> Val.
-%% Evaluates is_record/3 using type information.
-%%
-eval_is_record(Call, Term, #c_literal{val=NeededTag},
- #c_literal{val=Size}, Types) ->
- case get_type(Term, Types) of
- none ->
- Call;
- Type ->
- Es = case cerl:is_c_tuple(Type) of
- false -> [];
- true -> cerl:tuple_es(Type)
- end,
- case Es of
- [#c_literal{val=Tag}|_] ->
- Bool = Tag =:= NeededTag andalso
- length(Es) =:= Size,
- #c_literal{val=Bool};
- _ ->
- #c_literal{val=false}
- end
- end;
-eval_is_record(Call, _, _, _, _) -> Call.
-
-%% eval_setelement(Call, Pos, Tuple, NewVal) -> Core.
-%% Evaluates setelement/3 if position Pos is an integer
-%% and the shape of the tuple Tuple is known.
-%%
-eval_setelement(Call, #c_literal{val=Pos}, Tuple, NewVal)
- when is_integer(Pos) ->
- case cerl:is_data(Tuple) of
- false ->
- Call;
- true ->
- Es0 = case cerl:is_c_tuple(Tuple) of
- false -> [];
- true -> cerl:tuple_es(Tuple)
- end,
- if
- 1 =< Pos, Pos =< length(Es0) ->
- Es = eval_setelement_1(Pos, Es0, NewVal),
- cerl:update_c_tuple(Tuple, Es);
- true ->
- eval_failure(Call, badarg)
- end
- end;
-eval_setelement(Call, _, _, _) -> Call.
-
-eval_setelement_1(1, [_|T], NewVal) ->
- [NewVal|T];
-eval_setelement_1(Pos, [H|T], NewVal) when Pos > 1 ->
- [H|eval_setelement_1(Pos-1, T, NewVal)].
-
%% eval_failure(Call, Reason) -> Core.
%% Warn for a call that will fail and replace the call with
%% a call to erlang:error(Reason).
@@ -1290,16 +1194,15 @@ clause(#c_clause{pats=Ps0}=Cl, Cexpr, Ctxt, Sub0) ->
end.
clause_1(#c_clause{guard=G0,body=B0}=Cl, Ps1, Cexpr, Ctxt, Sub1) ->
- Sub2 = update_types(Cexpr, Ps1, Sub1),
GSub = case {Cexpr,Ps1,G0} of
{_,_,#c_literal{}} ->
%% No need for substitution tricks when the guard
%% does not contain any variables.
- Sub2;
+ Sub1;
{#c_var{name='_'},_,_} ->
%% In a 'receive', Cexpr is the variable '_', which represents the
%% message being matched. We must NOT do any extra substiutions.
- Sub2;
+ Sub1;
{#c_var{},[#c_var{}=Var],_} ->
%% The idea here is to optimize expressions such as
%%
@@ -1321,16 +1224,16 @@ clause_1(#c_clause{guard=G0,body=B0}=Cl, Ps1, Cexpr, Ctxt, Sub1) ->
%%
case cerl:is_c_fname(Cexpr) of
false ->
- sub_set_var(Var, Cexpr, Sub2);
+ sub_set_var(Var, Cexpr, Sub1);
true ->
%% We must not copy funs, and especially not into guards.
- Sub2
+ Sub1
end;
_ ->
- Sub2
+ Sub1
end,
G1 = guard(G0, GSub),
- B1 = body(B0, Ctxt, Sub2),
+ B1 = body(B0, Ctxt, Sub1),
Cl#c_clause{pats=Ps1,guard=G1,body=B1}.
%% let_substs(LetVars, LetArg, Sub) -> {[Var],[Val],Sub}.
@@ -1414,8 +1317,7 @@ pattern(#c_binary{segments=V0}=Pat, Isub, Osub0) ->
{Pat#c_binary{segments=V1},Osub1};
pattern(#c_alias{var=V0,pat=P0}=Pat, Isub, Osub0) ->
{V1,Osub1} = pattern(V0, Isub, Osub0),
- {P1,Osub2} = pattern(P0, Isub, Osub1),
- Osub = update_types(V1, [P1], Osub2),
+ {P1,Osub} = pattern(P0, Isub, Osub1),
{Pat#c_alias{var=V1,pat=P1},Osub}.
map_pair_pattern_list(Ps0, Isub, Osub0) ->
@@ -2137,14 +2039,9 @@ case_expand_var(E, #sub{t=Tdb}) ->
%% encountered.
coerce_to_data(C) ->
- case cerl:is_c_alias(C) of
- false ->
- case cerl:is_data(C) orelse cerl:is_c_var(C) of
- true -> C;
- false -> throw(impossible)
- end;
- true ->
- coerce_to_data(cerl:alias_pat(C))
+ case cerl:is_data(C) orelse cerl:is_c_var(C) of
+ true -> C;
+ false -> throw(impossible)
end.
%% case_opt_nomatch(E, Clauses, LitExpr) -> Clauses'
@@ -3140,14 +3037,6 @@ is_int_type(Var, Sub) ->
C -> yes_no(cerl:is_c_int(C))
end.
--spec is_tuple_type(cerl:cerl(), sub()) -> yes_no_maybe().
-
-is_tuple_type(Var, Sub) ->
- case get_type(Var, Sub) of
- none -> maybe;
- C -> yes_no(cerl:is_c_tuple(C))
- end.
-
yes_no(true) -> yes;
yes_no(false) -> no.
@@ -3209,27 +3098,23 @@ returns_integer(_, _) -> false.
%% update_types(Expr, Pattern, Sub) -> Sub'
%% Update the type database.
--spec update_types(cerl:cerl(), [type_info()], sub()) -> sub().
+-spec update_types(cerl:c_var(), [type_info()], sub()) -> sub().
-update_types(Expr, Pat, #sub{t=Tdb0}=Sub) ->
- Tdb = update_types_1(Expr, Pat, Tdb0),
+update_types(#c_var{name=V}, Pat, #sub{t=Tdb0}=Sub) ->
+ Tdb = update_types_1(V, Pat, Tdb0),
Sub#sub{t=Tdb}.
-update_types_1(#c_var{name=V}, Pat, Types) ->
- update_types_2(V, Pat, Types);
-update_types_1(_, _, Types) -> Types.
-
-update_types_2(V, [#c_tuple{}=P], Types) ->
+update_types_1(V, [#c_tuple{}=P], Types) ->
Types#{V=>P};
-update_types_2(V, [#c_literal{val=Bool}], Types) when is_boolean(Bool) ->
+update_types_1(V, [#c_literal{val=Bool}], Types) when is_boolean(Bool) ->
Types#{V=>bool};
-update_types_2(V, [#c_fun{vars=Vars}], Types) ->
+update_types_1(V, [#c_fun{vars=Vars}], Types) ->
Types#{V=>{'fun',length(Vars)}};
-update_types_2(V, [#c_var{name={_,Arity}}], Types) ->
+update_types_1(V, [#c_var{name={_,Arity}}], Types) ->
Types#{V=>{'fun',Arity}};
-update_types_2(V, [Type], Types) when is_atom(Type) ->
+update_types_1(V, [Type], Types) when is_atom(Type) ->
Types#{V=>Type};
-update_types_2(_, _, Types) -> Types.
+update_types_1(_, _, Types) -> Types.
%% kill_types(V, Tdb) -> Tdb'
%% Kill any entries that references the variable,
diff --git a/lib/compiler/test/warnings_SUITE.erl b/lib/compiler/test/warnings_SUITE.erl
index c5d0bf8420..70b7100451 100644
--- a/lib/compiler/test/warnings_SUITE.erl
+++ b/lib/compiler/test/warnings_SUITE.erl
@@ -240,19 +240,7 @@ guard(Config) when is_list(Config) ->
{4,sys_core_fold,nomatch_guard},
{6,sys_core_fold,no_clause_match},
{6,sys_core_fold,nomatch_guard},
- {6,sys_core_fold,{eval_failure,badarg}},
- {8,sys_core_fold,no_clause_match},
- {8,sys_core_fold,nomatch_guard},
- {8,sys_core_fold,{eval_failure,badarg}},
- {9,sys_core_fold,no_clause_match},
- {9,sys_core_fold,nomatch_guard},
- {9,sys_core_fold,{eval_failure,badarg}},
- {10,sys_core_fold,no_clause_match},
- {10,sys_core_fold,nomatch_guard},
- {10,sys_core_fold,{eval_failure,badarg}},
- {11,sys_core_fold,no_clause_match},
- {11,sys_core_fold,nomatch_guard},
- {11,sys_core_fold,{eval_failure,badarg}}
+ {6,sys_core_fold,{eval_failure,badarg}}
]}}],
[] = run(Config, Ts),
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-04 23:46:18 +0000