with Atree; use Atree;
with Checks; use Checks;
with Debug; use Debug;
with Einfo; use Einfo;
with Errout; use Errout;
with Elists; use Elists;
with Exp_Ch2; use Exp_Ch2;
with Exp_Ch3; use Exp_Ch3;
with Exp_Ch7; use Exp_Ch7;
with Exp_Ch9; use Exp_Ch9;
with Exp_Ch11; use Exp_Ch11;
with Exp_Dbug; use Exp_Dbug;
with Exp_Disp; use Exp_Disp;
with Exp_Dist; use Exp_Dist;
with Exp_Intr; use Exp_Intr;
with Exp_Pakd; use Exp_Pakd;
with Exp_Tss; use Exp_Tss;
with Exp_Util; use Exp_Util;
with Freeze; use Freeze;
with Hostparm; use Hostparm;
with Inline; use Inline;
with Lib; use Lib;
with Nlists; use Nlists;
with Nmake; use Nmake;
with Opt; use Opt;
with Restrict; use Restrict;
with Rtsfind; use Rtsfind;
with Sem; use Sem;
with Sem_Ch6; use Sem_Ch6;
with Sem_Ch8; use Sem_Ch8;
with Sem_Ch12; use Sem_Ch12;
with Sem_Ch13; use Sem_Ch13;
with Sem_Disp; use Sem_Disp;
with Sem_Dist; use Sem_Dist;
with Sem_Res; use Sem_Res;
with Sem_Util; use Sem_Util;
with Sinfo; use Sinfo;
with Snames; use Snames;
with Stand; use Stand;
with Tbuild; use Tbuild;
with Uintp; use Uintp;
with Validsw; use Validsw;
package body Exp_Ch6 is
procedure Check_Overriding_Operation (Subp : Entity_Id);
procedure Detect_Infinite_Recursion (N : Node_Id; Spec : Entity_Id);
procedure Expand_Actuals (N : Node_Id; Subp : Entity_Id);
procedure Expand_Inlined_Call
(N : Node_Id;
Subp : Entity_Id;
Orig_Subp : Entity_Id);
function Expand_Protected_Object_Reference
(N : Node_Id;
Scop : Entity_Id)
return Node_Id;
procedure Expand_Protected_Subprogram_Call
(N : Node_Id;
Subp : Entity_Id;
Scop : Entity_Id);
procedure Check_Overriding_Operation (Subp : Entity_Id) is
Typ : constant Entity_Id := Find_Dispatching_Type (Subp);
Op_List : constant Elist_Id := Primitive_Operations (Typ);
Op_Elmt : Elmt_Id;
Prim_Op : Entity_Id;
Par_Op : Entity_Id;
begin
if Is_Derived_Type (Typ)
and then not Is_Private_Type (Typ)
and then In_Open_Scopes (Scope (Etype (Typ)))
and then Typ = Base_Type (Typ)
then
Op_Elmt := First_Elmt (Op_List);
while Present (Op_Elmt) loop
Prim_Op := Node (Op_Elmt);
Par_Op := Alias (Prim_Op);
if Present (Par_Op)
and then not Comes_From_Source (Prim_Op)
and then Chars (Prim_Op) /= Chars (Par_Op)
and then Chars (Par_Op) = Chars (Subp)
and then Is_Hidden (Par_Op)
and then Type_Conformant (Prim_Op, Subp)
then
Set_DT_Position (Subp, DT_Position (Prim_Op));
end if;
Next_Elmt (Op_Elmt);
end loop;
end if;
end Check_Overriding_Operation;
procedure Detect_Infinite_Recursion (N : Node_Id; Spec : Entity_Id) is
Loc : constant Source_Ptr := Sloc (N);
Var_List : Elist_Id := New_Elmt_List;
Call_List : Elist_Id := New_Elmt_List;
Shad_List : Elist_Id := New_Elmt_List;
Scop : constant Uint := Scope_Depth (Spec);
Max_Vars : constant := 4;
Count_Vars : Natural := 0;
Var : Entity_Id;
Elm : Elmt_Id;
Ent : Entity_Id;
Call : Elmt_Id;
Decl : Node_Id;
Test : Node_Id;
Elm1 : Elmt_Id;
Elm2 : Elmt_Id;
Last : Node_Id;
function Process (Nod : Node_Id) return Traverse_Result;
function Process (Nod : Node_Id) return Traverse_Result is
begin
if Nkind (Nod) = N_Procedure_Call_Statement then
if Is_Entity_Name (Name (Nod))
and then Has_Recursive_Call (Entity (Name (Nod)))
and then Entity (Name (Nod)) = Spec
then
Append_Elmt (Nod, Call_List);
return Skip;
else
return Abandon;
end if;
elsif Nkind (Nod) = N_Function_Call
and then Is_Entity_Name (Name (Nod))
and then Is_Pure (Entity (Name (Nod)))
then
return Skip;
elsif Nkind (Nod) = N_Identifier then
Ent := Entity (Nod);
if No (Ent) then
return Skip;
elsif No (Scope (Ent)) then
return Skip;
elsif Scope_Depth (Scope (Ent)) >= Scop then
return Skip;
elsif Is_Type (Ent)
or else Ekind (Ent) = E_Exception
or else Ekind (Ent) = E_Constant
then
return Skip;
elsif Ekind (Ent) /= E_Variable
or else not Is_Scalar_Type (Etype (Ent))
or else Is_Volatile (Ent)
then
return Abandon;
else
Elm := First_Elmt (Var_List);
loop
if No (Elm) then
Count_Vars := Count_Vars + 1;
if Count_Vars <= Max_Vars then
Append_Elmt (Entity (Nod), Var_List);
else
return Abandon;
end if;
exit;
elsif Node (Elm) = Entity (Nod) then
return Skip;
else
Next_Elmt (Elm);
end if;
end loop;
return Skip;
end if;
else
return OK;
end if;
end Process;
function Traverse_Body is new Traverse_Func;
begin
if Restrictions (No_Implicit_Conditionals) then
return;
end if;
if Traverse_Body (N) = Abandon then
return;
elsif Is_Empty_Elmt_List (Call_List) then
return;
end if;
New_Scope (Spec);
Last := Empty;
Elm := First_Elmt (Var_List);
while Present (Elm) loop
Var := Node (Elm);
Ent :=
Make_Defining_Identifier (Loc,
Chars => New_Internal_Name ('S'));
Append_Elmt (Ent, Shad_List);
Decl :=
Make_Object_Declaration (Loc,
Defining_Identifier => Ent,
Object_Definition => New_Occurrence_Of (Etype (Var), Loc),
Constant_Present => True,
Expression => New_Occurrence_Of (Var, Loc));
if No (Last) then
Prepend (Decl, Declarations (N));
else
Insert_After (Last, Decl);
end if;
Last := Decl;
Analyze (Decl);
Next_Elmt (Elm);
end loop;
Call := First_Elmt (Call_List);
while Present (Call) loop
Test := New_Occurrence_Of (Standard_True, Loc);
Elm1 := First_Elmt (Var_List);
Elm2 := First_Elmt (Shad_List);
while Present (Elm1) loop
Test :=
Make_And_Then (Loc,
Left_Opnd => Test,
Right_Opnd =>
Make_Op_Eq (Loc,
Left_Opnd => New_Occurrence_Of (Node (Elm1), Loc),
Right_Opnd => New_Occurrence_Of (Node (Elm2), Loc)));
Next_Elmt (Elm1);
Next_Elmt (Elm2);
end loop;
Rewrite (Node (Call),
Make_If_Statement (Loc,
Condition => Test,
Then_Statements => New_List (
Make_Raise_Storage_Error (Loc,
Reason => SE_Infinite_Recursion)),
Else_Statements => New_List (
Relocate_Node (Node (Call)))));
Analyze (Node (Call));
Next_Elmt (Call);
end loop;
Pop_Scope;
end Detect_Infinite_Recursion;
procedure Expand_Actuals (N : Node_Id; Subp : Entity_Id) is
Loc : constant Source_Ptr := Sloc (N);
Actual : Node_Id;
Formal : Entity_Id;
N_Node : Node_Id;
Post_Call : List_Id;
E_Formal : Entity_Id;
procedure Add_Call_By_Copy_Code;
procedure Add_Packed_Call_By_Copy_Code;
procedure Check_Fortran_Logical;
function Make_Var (Actual : Node_Id) return Entity_Id;
procedure Reset_Packed_Prefix;
procedure Add_Call_By_Copy_Code is
Expr : Node_Id;
Init : Node_Id;
Temp : Entity_Id;
Var : Entity_Id;
V_Typ : Entity_Id;
Crep : Boolean;
begin
Temp := Make_Defining_Identifier (Loc, New_Internal_Name ('T'));
if Nkind (Actual) = N_Type_Conversion then
V_Typ := Etype (Expression (Actual));
Var := Make_Var (Expression (Actual));
Crep := not Same_Representation
(Etype (Formal), Etype (Expression (Actual)));
else
V_Typ := Etype (Actual);
Var := Make_Var (Actual);
Crep := False;
end if;
if Ekind (Formal) = E_In_Out_Parameter
or else (Is_Array_Type (Etype (Formal))
and then
not Is_Constrained (Etype (Formal)))
then
if Nkind (Actual) = N_Type_Conversion then
if Conversion_OK (Actual) then
Init := OK_Convert_To
(Etype (Formal), New_Occurrence_Of (Var, Loc));
else
Init := Convert_To
(Etype (Formal), New_Occurrence_Of (Var, Loc));
end if;
else
Init := New_Occurrence_Of (Var, Loc);
end if;
elsif Ekind (Formal) = E_Out_Parameter
and then Nkind (Actual) = N_Type_Conversion
and then (Is_Bit_Packed_Array (Etype (Formal))
or else
Is_Bit_Packed_Array (Etype (Expression (Actual))))
then
if Conversion_OK (Actual) then
Init :=
OK_Convert_To (Etype (Formal), New_Occurrence_Of (Var, Loc));
else
Init :=
Convert_To (Etype (Formal), New_Occurrence_Of (Var, Loc));
end if;
else
Init := Empty;
end if;
N_Node :=
Make_Object_Declaration (Loc,
Defining_Identifier => Temp,
Object_Definition =>
New_Occurrence_Of (Etype (Formal), Loc),
Expression => Init);
Set_Assignment_OK (N_Node);
Insert_Action (N, N_Node);
if Crep
and then Present (Expression (N_Node))
and then Is_Entity_Name (Expression (N_Node))
then
Temp := Entity (Expression (N_Node));
Rewrite (N_Node, Make_Null_Statement (Loc));
end if;
if Nkind (Actual) = N_Type_Conversion then
if Conversion_OK (Actual) then
Expr := OK_Convert_To (V_Typ, New_Occurrence_Of (Temp, Loc));
else
Expr := Convert_To (V_Typ, New_Occurrence_Of (Temp, Loc));
end if;
else
Expr := New_Occurrence_Of (Temp, Loc);
end if;
Rewrite (Actual, New_Reference_To (Temp, Loc));
Analyze (Actual);
Append_To (Post_Call,
Make_Assignment_Statement (Loc,
Name => New_Occurrence_Of (Var, Loc),
Expression => Expr));
Set_Assignment_OK (Name (Last (Post_Call)));
end Add_Call_By_Copy_Code;
procedure Add_Packed_Call_By_Copy_Code is
Temp : Entity_Id;
Incod : Node_Id;
Outcod : Node_Id;
Lhs : Node_Id;
Rhs : Node_Id;
begin
Reset_Packed_Prefix;
Temp := Make_Defining_Identifier (Loc, New_Internal_Name ('T'));
Incod := Relocate_Node (Actual);
Outcod := New_Copy_Tree (Incod);
if Ekind (Formal) = E_Out_Parameter then
Incod := Empty;
end if;
Insert_Action (N,
Make_Object_Declaration (Loc,
Defining_Identifier => Temp,
Object_Definition =>
New_Occurrence_Of (Etype (Formal), Loc),
Expression => Incod));
Rewrite (Actual, New_Occurrence_Of (Temp, Loc));
if Ekind (Formal) /= E_In_Parameter then
Lhs := Outcod;
Rhs := New_Occurrence_Of (Temp, Loc);
if Nkind (Lhs) = N_Type_Conversion then
Lhs := Expression (Lhs);
Rhs := Convert_To (Etype (Actual), Rhs);
end if;
Append_To (Post_Call,
Make_Assignment_Statement (Loc,
Name => Lhs,
Expression => Rhs));
end if;
end Add_Packed_Call_By_Copy_Code;
procedure Check_Fortran_Logical is
Logical : Entity_Id := Etype (Formal);
Var : Entity_Id;
begin
if Convention (Subp) = Convention_Fortran
and then Root_Type (Etype (Formal)) = Standard_Boolean
and then Ekind (Formal) /= E_In_Parameter
then
Var := Make_Var (Actual);
Append_To (Post_Call,
Make_Assignment_Statement (Loc,
Name => New_Occurrence_Of (Var, Loc),
Expression =>
Unchecked_Convert_To (
Logical,
Make_Op_Ne (Loc,
Left_Opnd => New_Occurrence_Of (Var, Loc),
Right_Opnd =>
Unchecked_Convert_To (
Logical,
New_Occurrence_Of (Standard_False, Loc))))));
end if;
end Check_Fortran_Logical;
function Make_Var (Actual : Node_Id) return Entity_Id is
Var : Entity_Id;
begin
if Is_Entity_Name (Actual) then
return Entity (Actual);
else
Var := Make_Defining_Identifier (Loc, New_Internal_Name ('T'));
N_Node :=
Make_Object_Renaming_Declaration (Loc,
Defining_Identifier => Var,
Subtype_Mark =>
New_Occurrence_Of (Etype (Actual), Loc),
Name => Relocate_Node (Actual));
Insert_Action (N, N_Node);
return Var;
end if;
end Make_Var;
procedure Reset_Packed_Prefix is
Pfx : Node_Id := Actual;
begin
loop
Set_Analyzed (Pfx, False);
exit when Nkind (Pfx) /= N_Selected_Component
and then Nkind (Pfx) /= N_Indexed_Component;
Pfx := Prefix (Pfx);
end loop;
end Reset_Packed_Prefix;
begin
Formal := First_Formal (Subp);
Actual := First_Actual (N);
Post_Call := New_List;
while Present (Formal) loop
E_Formal := Etype (Formal);
if Is_Scalar_Type (E_Formal)
or else Nkind (Actual) = N_Slice
then
Check_Fortran_Logical;
elsif Ekind (Formal) /= E_Out_Parameter then
if Is_Entity_Name (Actual)
and then Ekind (Entity (Actual)) = E_Protected_Type
and then In_Open_Scopes (Entity (Actual))
then
if Scope (Subp) /= Entity (Actual) then
Error_Msg_N ("operation outside protected type may not "
& "call back its protected operations?", Actual);
end if;
Rewrite (Actual,
Expand_Protected_Object_Reference (N, Entity (Actual)));
end if;
Apply_Constraint_Check (Actual, E_Formal);
elsif Is_Access_Type (E_Formal) then
null;
elsif Has_Discriminants (Base_Type (E_Formal))
or else Has_Non_Null_Base_Init_Proc (E_Formal)
then
Apply_Constraint_Check (Actual, E_Formal);
else
Apply_Constraint_Check (Actual, Base_Type (E_Formal));
end if;
if Ekind (Formal) /= E_In_Parameter then
if Is_Array_Type (E_Formal)
and then Nkind (Actual) = N_Type_Conversion
then
if Is_Constrained (E_Formal) then
Apply_Length_Check (Expression (Actual), E_Formal);
else
Apply_Range_Check (Expression (Actual), E_Formal);
end if;
end if;
if Nkind (Actual) = N_Type_Conversion
and then
(Is_Numeric_Type (E_Formal)
or else Is_Access_Type (E_Formal)
or else Is_Enumeration_Type (E_Formal)
or else Is_Bit_Packed_Array (Etype (Formal))
or else Is_Bit_Packed_Array (Etype (Expression (Actual)))
or else not Same_Representation
(Etype (Formal),
Etype (Expression (Actual))))
then
Add_Call_By_Copy_Code;
elsif Is_Ref_To_Bit_Packed_Array (Actual) then
Add_Packed_Call_By_Copy_Code;
elsif Is_Ref_To_Bit_Packed_Slice (Actual) then
Add_Call_By_Copy_Code;
elsif Is_Access_Type (E_Formal)
and then not Same_Type (E_Formal, Etype (Actual))
and then not Is_Tagged_Type (Designated_Type (E_Formal))
then
Add_Call_By_Copy_Code;
elsif Is_Entity_Name (Actual)
and then Is_Volatile (Entity (Actual))
and then not Is_Scalar_Type (Etype (Entity (Actual)))
and then not Is_Volatile (E_Formal)
then
Add_Call_By_Copy_Code;
elsif Nkind (Actual) = N_Indexed_Component
and then Is_Entity_Name (Prefix (Actual))
and then Has_Volatile_Components (Entity (Prefix (Actual)))
then
Add_Call_By_Copy_Code;
end if;
else
if Nkind (Actual) = N_Indexed_Component
and then Is_Packed (Etype (Prefix (Actual)))
then
Reset_Packed_Prefix;
Expand_Packed_Element_Reference (Actual);
elsif Is_Ref_To_Bit_Packed_Array (Actual) then
Add_Packed_Call_By_Copy_Code;
elsif Is_Ref_To_Bit_Packed_Slice (Actual) then
declare
Typ : constant Entity_Id := Etype (Actual);
Ent : constant Entity_Id :=
Make_Defining_Identifier (Loc,
Chars => New_Internal_Name ('T'));
Decl : constant Node_Id :=
Make_Object_Declaration (Loc,
Defining_Identifier => Ent,
Object_Definition =>
New_Occurrence_Of (Typ, Loc));
begin
Set_No_Initialization (Decl);
Insert_Actions (N, New_List (
Decl,
Make_Assignment_Statement (Loc,
Name => New_Occurrence_Of (Ent, Loc),
Expression => Relocate_Node (Actual))));
Rewrite
(Actual, New_Occurrence_Of (Ent, Loc));
Analyze_And_Resolve (Actual, Typ);
end;
end if;
end if;
Next_Formal (Formal);
Next_Actual (Actual);
end loop;
if not Is_Empty_List (Post_Call) then
if not Is_List_Member (N) then
declare
P : constant Node_Id := Parent (N);
begin
pragma Assert (Nkind (P) = N_Triggering_Alternative
or else Nkind (P) = N_Entry_Call_Alternative);
if Is_Non_Empty_List (Statements (P)) then
Insert_List_Before_And_Analyze
(First (Statements (P)), Post_Call);
else
Set_Statements (P, Post_Call);
end if;
end;
else
Insert_Actions_After (N, Post_Call);
end if;
end if;
end Expand_Actuals;
procedure Expand_Call (N : Node_Id) is
Loc : constant Source_Ptr := Sloc (N);
Remote : constant Boolean := Is_Remote_Call (N);
Subp : Entity_Id;
Orig_Subp : Entity_Id := Empty;
Parent_Subp : Entity_Id;
Parent_Formal : Entity_Id;
Actual : Node_Id;
Formal : Entity_Id;
Prev : Node_Id := Empty;
Prev_Orig : Node_Id;
Scop : Entity_Id;
Extra_Actuals : List_Id := No_List;
Cond : Node_Id;
procedure Add_Actual_Parameter (Insert_Param : Node_Id);
procedure Add_Extra_Actual (Expr : Node_Id; EF : Entity_Id);
function Inherited_From_Formal (S : Entity_Id) return Entity_Id;
procedure Add_Actual_Parameter (Insert_Param : Node_Id) is
Actual_Expr : constant Node_Id :=
Explicit_Actual_Parameter (Insert_Param);
begin
if No (Prev) or else
Nkind (Parent (Prev)) /= N_Parameter_Association
then
Set_Next_Named_Actual (Insert_Param, First_Named_Actual (N));
Set_First_Named_Actual (N, Actual_Expr);
if No (Prev) then
if not Present (Parameter_Associations (N)) then
Set_Parameter_Associations (N, New_List);
Append (Insert_Param, Parameter_Associations (N));
end if;
else
Insert_After (Prev, Insert_Param);
end if;
else
Set_Next_Named_Actual
(Insert_Param, Next_Named_Actual (Parent (Prev)));
Set_Next_Named_Actual (Parent (Prev), Actual_Expr);
Append (Insert_Param, Parameter_Associations (N));
end if;
Prev := Actual_Expr;
end Add_Actual_Parameter;
procedure Add_Extra_Actual (Expr : Node_Id; EF : Entity_Id) is
Loc : constant Source_Ptr := Sloc (Expr);
begin
if Extra_Actuals = No_List then
Extra_Actuals := New_List;
Set_Parent (Extra_Actuals, N);
end if;
Append_To (Extra_Actuals,
Make_Parameter_Association (Loc,
Explicit_Actual_Parameter => Expr,
Selector_Name =>
Make_Identifier (Loc, Chars (EF))));
Analyze_And_Resolve (Expr, Etype (EF));
end Add_Extra_Actual;
function Inherited_From_Formal (S : Entity_Id) return Entity_Id is
Par : Entity_Id;
Gen_Par : Entity_Id;
Gen_Prim : Elist_Id;
Elmt : Elmt_Id;
Indic : Node_Id;
begin
if Nkind (Parent (S)) /= N_Full_Type_Declaration
or else not Is_Derived_Type (Defining_Identifier (Parent (S)))
or else Nkind (Type_Definition (Original_Node (Parent (S))))
/= N_Derived_Type_Definition
then
return Empty;
else
Indic :=
(Subtype_Indication
(Type_Definition (Original_Node (Parent (S)))));
if Nkind (Indic) = N_Subtype_Indication then
Par := Entity (Subtype_Mark (Indic));
else
Par := Entity (Indic);
end if;
end if;
if not Is_Generic_Actual_Type (Par)
or else Is_Tagged_Type (Par)
or else Nkind (Parent (Par)) /= N_Subtype_Declaration
or else not In_Open_Scopes (Scope (Par))
or else not In_Instance
then
return Empty;
else
Gen_Par := Generic_Parent_Type (Parent (Par));
end if;
Gen_Prim := Collect_Primitive_Operations (Gen_Par);
Elmt := First_Elmt (Gen_Prim);
while Present (Elmt) loop
if Chars (Node (Elmt)) = Chars (S) then
declare
F1 : Entity_Id;
F2 : Entity_Id;
begin
F1 := First_Formal (S);
F2 := First_Formal (Node (Elmt));
while Present (F1)
and then Present (F2)
loop
if Etype (F1) = Etype (F2)
or else Etype (F2) = Gen_Par
then
Next_Formal (F1);
Next_Formal (F2);
else
Next_Elmt (Elmt);
exit; end if;
return Node (Elmt);
end loop;
end;
else
Next_Elmt (Elmt);
end if;
end loop;
raise Program_Error;
end Inherited_From_Formal;
begin
if Nkind (N) in N_Has_Etype and then Etype (N) = Any_Type then
return;
end if;
if Nkind (Name (N)) = N_Explicit_Dereference then
Subp := Etype (Name (N));
Parent_Subp := Empty;
elsif Nkind (Name (N)) = N_Selected_Component then
Subp := Entity (Selector_Name (Name (N)));
Parent_Subp := Empty;
elsif Nkind (Name (N)) = N_Indexed_Component then
Subp := Entity (Selector_Name (Prefix (Name (N))));
Parent_Subp := Empty;
else
Subp := Entity (Name (N));
Parent_Subp := Alias (Subp);
if not Restrictions (No_Exception_Handlers)
and then Is_RTE (Subp, RE_Raise_Exception)
then
declare
FA : constant Node_Id := Original_Node (First_Actual (N));
begin
if Nkind (FA) = N_Attribute_Reference
and then Attribute_Name (FA) = Name_Identity
then
Subp := RTE (RE_Raise_Exception_Always);
Set_Entity (Name (N), Subp);
end if;
end;
end if;
if Ekind (Subp) = E_Entry then
Parent_Subp := Empty;
end if;
end if;
Formal := First_Formal (Subp);
Actual := First_Actual (N);
while Present (Formal) loop
Prev := Actual;
Prev_Orig := Original_Node (Prev);
if Present (Extra_Constrained (Formal)) then
if Ekind (Etype (Prev)) in Private_Kind
and then not Has_Discriminants (Base_Type (Etype (Prev)))
then
Add_Extra_Actual (
New_Occurrence_Of (Standard_False, Loc),
Extra_Constrained (Formal));
elsif Is_Constrained (Etype (Formal))
or else not Has_Discriminants (Etype (Prev))
then
Add_Extra_Actual (
New_Occurrence_Of (Standard_True, Loc),
Extra_Constrained (Formal));
else
declare
Act_Prev : Node_Id := Prev;
begin
if Nkind (Act_Prev) = N_Type_Conversion
or else Nkind (Act_Prev) = N_Unchecked_Type_Conversion
then
Act_Prev := Expression (Act_Prev);
end if;
Add_Extra_Actual (
Make_Attribute_Reference (Sloc (Prev),
Prefix => Duplicate_Subexpr (Act_Prev, Name_Req => True),
Attribute_Name => Name_Constrained),
Extra_Constrained (Formal));
end;
end if;
end if;
if Present (Extra_Accessibility (Formal)) then
if Is_Entity_Name (Prev_Orig) then
if Ekind (Entity (Prev_Orig)) in Formal_Kind
and then Ekind (Etype (Prev_Orig)) = E_Anonymous_Access_Type
and then In_Open_Scopes (Scope (Entity (Prev_Orig)))
then
declare
Parm_Ent : constant Entity_Id := Param_Entity (Prev_Orig);
begin
pragma Assert (Present (Parm_Ent));
if Present (Extra_Accessibility (Parm_Ent)) then
Add_Extra_Actual (
New_Occurrence_Of
(Extra_Accessibility (Parm_Ent), Loc),
Extra_Accessibility (Formal));
else
Add_Extra_Actual (
Make_Integer_Literal (Loc,
Intval => Scope_Depth (Standard_Standard)),
Extra_Accessibility (Formal));
end if;
end;
else
Add_Extra_Actual (
Make_Integer_Literal (Loc,
Intval => Type_Access_Level (Etype (Prev_Orig))),
Extra_Accessibility (Formal));
end if;
else
case Nkind (Prev_Orig) is
when N_Attribute_Reference =>
case Get_Attribute_Id (Attribute_Name (Prev_Orig)) is
when Attribute_Access =>
Add_Extra_Actual (
Make_Integer_Literal (Loc,
Intval =>
Object_Access_Level (Prefix (Prev_Orig))),
Extra_Accessibility (Formal));
when Attribute_Unchecked_Access |
Attribute_Unrestricted_Access =>
Add_Extra_Actual (
Make_Integer_Literal (Loc,
Intval => Scope_Depth (Standard_Standard)),
Extra_Accessibility (Formal));
when others =>
raise Program_Error;
end case;
when N_Allocator =>
Add_Extra_Actual (
Make_Integer_Literal (Loc,
Scope_Depth (Current_Scope) + 1),
Extra_Accessibility (Formal));
when others =>
Add_Extra_Actual (
Make_Integer_Literal (Loc,
Intval => Type_Access_Level (Etype (Prev_Orig))),
Extra_Accessibility (Formal));
end case;
end if;
end if;
if Ekind (Etype (Formal)) /= E_Anonymous_Access_Type
or else Suppress_Accessibility_Checks (Subp)
then
null;
elsif Debug_Flag_J then
null;
elsif not Comes_From_Source (Prev) then
null;
elsif Is_Entity_Name (Prev)
and then Ekind (Etype (Prev)) = E_Anonymous_Access_Type
then
null;
elsif Nkind (Prev) = N_Allocator
or else Nkind (Prev) = N_Attribute_Reference
then
null;
elsif Convention (Subp) = Convention_Java then
null;
else
Cond :=
Make_Op_Eq (Loc,
Left_Opnd => Duplicate_Subexpr (Prev),
Right_Opnd => Make_Null (Loc));
Insert_Action (Prev,
Make_Raise_Constraint_Error (Loc,
Condition => Cond,
Reason => CE_Access_Parameter_Is_Null));
end if;
if Validity_Checks_On then
if Ekind (Formal) = E_In_Parameter
and then Validity_Check_In_Params
then
Ensure_Valid (Actual);
elsif Ekind (Formal) = E_In_Out_Parameter
and then Validity_Check_In_Out_Params
then
Ensure_Valid (Actual);
end if;
end if;
if Comes_From_Source (N)
and then Ekind (Formal) /= E_In_Parameter
and then Validity_Checks_On
and then Validity_Check_Default
and then not Validity_Check_Subscripts
then
Check_Valid_Lvalue_Subscripts (Actual);
end if;
if not Is_Class_Wide_Type (Etype (Formal)) then
null;
elsif Nkind (Actual) = N_Aggregate
or else (Nkind (Actual) = N_Qualified_Expression
and then Nkind (Expression (Actual)) = N_Aggregate)
then
Force_Evaluation (Actual);
end if;
if Remote
and then Is_Class_Wide_Type (Etype (Formal))
then
Insert_Action (Actual,
Make_Implicit_If_Statement (N,
Condition =>
Make_Op_Not (Loc,
Get_Remotely_Callable (Duplicate_Subexpr (Actual))),
Then_Statements => New_List (
Make_Procedure_Call_Statement (Loc,
New_Occurrence_Of (RTE
(RE_Raise_Program_Error_For_E_4_18), Loc)))));
end if;
Next_Actual (Actual);
Next_Formal (Formal);
end loop;
if Nkind (N) = N_Function_Call
and then Is_Tag_Indeterminate (N)
and then Is_Entity_Name (Name (N))
then
declare
Ass : Node_Id := Empty;
begin
if Nkind (Parent (N)) = N_Assignment_Statement then
Ass := Parent (N);
elsif Nkind (Parent (N)) = N_Qualified_Expression
and then Nkind (Parent (Parent (N))) = N_Assignment_Statement
then
Ass := Parent (Parent (N));
end if;
if Present (Ass)
and then Is_Class_Wide_Type (Etype (Name (Ass)))
then
Propagate_Tag (Name (Ass), N);
return;
end if;
end;
end if;
if (Nkind (N) = N_Function_Call
or else Nkind (N) = N_Procedure_Call_Statement)
and then Present (Controlling_Argument (N))
and then not Java_VM
then
Expand_Dispatch_Call (N);
return;
elsif Is_All_Remote_Call (N) then
Expand_All_Calls_Remote_Subprogram_Call (N);
elsif Is_Protected_Type (Scope (Subp))
and then (Ekind (Subp) = E_Procedure
or else Ekind (Subp) = E_Function)
then
null;
else
while Is_Non_Empty_List (Extra_Actuals) loop
Add_Actual_Parameter (Remove_Head (Extra_Actuals));
end loop;
end if;
if Ekind (Subp) = E_Procedure
or else (Ekind (Subp) = E_Subprogram_Type
and then Etype (Subp) = Standard_Void_Type)
or else Is_Entry (Subp)
then
Expand_Actuals (N, Subp);
end if;
if Nkind (N) /= N_Entry_Call_Statement
and then No (Controlling_Argument (N))
and then Present (Parent_Subp)
then
if Present (Inherited_From_Formal (Subp)) then
Parent_Subp := Inherited_From_Formal (Subp);
else
while Present (Alias (Parent_Subp)) loop
Parent_Subp := Alias (Parent_Subp);
end loop;
end if;
Set_Entity (Name (N), Parent_Subp);
if Is_Abstract (Parent_Subp)
and then not In_Instance
then
Error_Msg_NE
("cannot call abstract subprogram &!", Name (N), Parent_Subp);
end if;
Formal := First_Formal (Subp);
Parent_Formal := First_Formal (Parent_Subp);
Actual := First_Actual (N);
if not Is_Intrinsic_Subprogram (Parent_Subp)
or else Is_Generic_Instance (Parent_Subp)
then
while Present (Formal) loop
if Etype (Formal) /= Etype (Parent_Formal)
and then Is_Scalar_Type (Etype (Formal))
and then Ekind (Formal) = E_In_Parameter
and then not Raises_Constraint_Error (Actual)
then
Rewrite (Actual,
OK_Convert_To (Etype (Parent_Formal),
Relocate_Node (Actual)));
Analyze (Actual);
Resolve (Actual, Etype (Parent_Formal));
Enable_Range_Check (Actual);
elsif Is_Access_Type (Etype (Formal))
and then Base_Type (Etype (Parent_Formal))
/= Base_Type (Etype (Actual))
then
if Ekind (Formal) /= E_In_Parameter then
Rewrite (Actual,
Convert_To (Etype (Parent_Formal),
Relocate_Node (Actual)));
Analyze (Actual);
Resolve (Actual, Etype (Parent_Formal));
elsif
Ekind (Etype (Parent_Formal)) = E_Anonymous_Access_Type
and then
Designated_Type (Etype (Parent_Formal))
/= Designated_Type (Etype (Actual))
and then not Is_Controlling_Formal (Formal)
then
Rewrite (Actual,
Unchecked_Convert_To (Etype (Parent_Formal),
Relocate_Node (Actual)));
Analyze (Actual);
Resolve (Actual, Etype (Parent_Formal));
end if;
end if;
Next_Formal (Formal);
Next_Formal (Parent_Formal);
Next_Actual (Actual);
end loop;
end if;
Orig_Subp := Subp;
Subp := Parent_Subp;
end if;
if Nkind (Name (N)) /= N_Explicit_Dereference then
if Ekind (Subp) = E_Enumeration_Literal then
if Base_Type (Etype (Subp)) /= Base_Type (Etype (N)) then
Rewrite
(N, Convert_To (Etype (N), New_Occurrence_Of (Subp, Loc)));
else
Rewrite (N, New_Occurrence_Of (Subp, Loc));
Resolve (N, Etype (N));
end if;
end if;
else
if Ekind (Base_Type (Etype (Prefix (Name (N))))) =
E_Access_Protected_Subprogram_Type
then
declare
Call : Node_Id;
Parm : List_Id;
Nam : Node_Id;
Obj : Node_Id;
Ptr : Node_Id := Prefix (Name (N));
T : Entity_Id := Equivalent_Type (Base_Type (Etype (Ptr)));
D_T : Entity_Id := Designated_Type (Base_Type (Etype (Ptr)));
begin
Obj := Make_Selected_Component (Loc,
Prefix => Unchecked_Convert_To (T, Ptr),
Selector_Name => New_Occurrence_Of (First_Entity (T), Loc));
Nam := Make_Selected_Component (Loc,
Prefix => Unchecked_Convert_To (T, Ptr),
Selector_Name => New_Occurrence_Of (
Next_Entity (First_Entity (T)), Loc));
Nam := Make_Explicit_Dereference (Loc, Nam);
if Present (Parameter_Associations (N)) then
Parm := Parameter_Associations (N);
else
Parm := New_List;
end if;
Prepend (Obj, Parm);
if Etype (D_T) = Standard_Void_Type then
Call := Make_Procedure_Call_Statement (Loc,
Name => Nam,
Parameter_Associations => Parm);
else
Call := Make_Function_Call (Loc,
Name => Nam,
Parameter_Associations => Parm);
end if;
Set_First_Named_Actual (Call, First_Named_Actual (N));
Set_Etype (Call, Etype (D_T));
Rewrite (N, Call);
Analyze (Nam);
Apply_Access_Check (Nam);
Analyze (Obj);
return;
end;
end if;
end if;
if Is_Intrinsic_Subprogram (Subp) then
Expand_Intrinsic_Call (N, Subp);
return;
end if;
if Ekind (Subp) = E_Function
or else Ekind (Subp) = E_Procedure
then
if Is_Inlined (Subp) then
declare
Spec : constant Node_Id := Unit_Declaration_Node (Subp);
begin
if Present (Spec)
and then Nkind (Spec) = N_Subprogram_Declaration
and then Present (Body_To_Inline (Spec))
and then (In_Extended_Main_Code_Unit (N)
or else In_Extended_Main_Code_Unit (Parent (N)))
and then (not In_Same_Extended_Unit
(Sloc (Body_To_Inline (Spec)), Loc)
or else
Earlier_In_Extended_Unit
(Sloc (Body_To_Inline (Spec)), Loc))
then
Expand_Inlined_Call (N, Subp, Orig_Subp);
else
Add_Inlined_Body (Subp);
if Front_End_Inlining
and then Nkind (Spec) = N_Subprogram_Declaration
and then (In_Extended_Main_Code_Unit (N))
and then No (Body_To_Inline (Spec))
and then not Has_Completion (Subp)
and then In_Same_Extended_Unit (Sloc (Spec), Loc)
and then Ineffective_Inline_Warnings
then
Error_Msg_N
("call cannot be inlined before body is seen?", N);
end if;
end if;
end;
end if;
end if;
Scop := Scope (Subp);
if Nkind (N) /= N_Entry_Call_Statement
and then Is_Protected_Type (Scop)
then
Expand_Protected_Subprogram_Call (N, Subp, Scop);
end if;
if Controlled_Type (Etype (Subp))
and then not Is_Return_By_Reference_Type (Etype (Subp))
then
Expand_Ctrl_Function_Call (N);
end if;
if (Ekind (Subp) = E_Procedure or else Ekind (Subp) = E_Function)
and then Present (First_Optional_Parameter (Subp))
then
declare
Last_Keep_Arg : Node_Id;
begin
Last_Keep_Arg := Empty;
Formal := First_Formal (Subp);
Actual := First_Actual (N);
while Formal /= First_Optional_Parameter (Subp) loop
Last_Keep_Arg := Actual;
Next_Formal (Formal);
Next_Actual (Actual);
end loop;
while Present (Formal) loop
if not Fully_Conformant_Expressions
(Actual, Default_Value (Formal))
then
Last_Keep_Arg := Actual;
end if;
Next_Formal (Formal);
Next_Actual (Actual);
end loop;
if No (Last_Keep_Arg) then
while Is_Non_Empty_List (Parameter_Associations (N)) loop
Delete_Tree (Remove_Head (Parameter_Associations (N)));
end loop;
Set_Parameter_Associations (N, No_List);
Set_First_Named_Actual (N, Empty);
elsif Is_List_Member (Last_Keep_Arg) then
while Present (Next (Last_Keep_Arg)) loop
Delete_Tree (Remove_Next (Last_Keep_Arg));
end loop;
Set_First_Named_Actual (N, Empty);
else
declare
Temp : Node_Id;
Passoc : Node_Id;
Junk : Node_Id;
begin
Temp := First (Parameter_Associations (N));
if Nkind (Temp) = N_Parameter_Association then
while Is_Non_Empty_List (Parameter_Associations (N)) loop
Temp := Remove_Head (Parameter_Associations (N));
end loop;
else
while Nkind (Next (Temp)) /= N_Parameter_Association loop
Next (Temp);
end loop;
while Present (Next (Temp)) loop
Junk := Remove_Next (Temp);
end loop;
end if;
Passoc := Parent (First_Named_Actual (N));
loop
Temp := Relocate_Node (Passoc);
Append_To
(Parameter_Associations (N), Temp);
exit when
Last_Keep_Arg = Explicit_Actual_Parameter (Passoc);
Passoc := Parent (Next_Named_Actual (Passoc));
end loop;
Set_Next_Named_Actual (Temp, Empty);
loop
Temp := Next_Named_Actual (Passoc);
exit when No (Temp);
Set_Next_Named_Actual
(Passoc, Next_Named_Actual (Parent (Temp)));
Delete_Tree (Temp);
end loop;
end;
end if;
end;
end if;
end Expand_Call;
procedure Expand_Inlined_Call
(N : Node_Id;
Subp : Entity_Id;
Orig_Subp : Entity_Id)
is
Loc : constant Source_Ptr := Sloc (N);
Blk : Node_Id;
Bod : Node_Id;
Decl : Node_Id;
Exit_Lab : Entity_Id := Empty;
F : Entity_Id;
A : Node_Id;
Lab_Decl : Node_Id;
Lab_Id : Node_Id;
New_A : Node_Id;
Num_Ret : Int := 0;
Orig_Bod : constant Node_Id :=
Body_To_Inline (Unit_Declaration_Node (Subp));
Ret_Type : Entity_Id;
Targ : Node_Id;
Temp : Entity_Id;
Temp_Typ : Entity_Id;
procedure Make_Exit_Label;
function Process_Formals (N : Node_Id) return Traverse_Result;
procedure Rewrite_Function_Call (N : Node_Id; Blk : Node_Id);
procedure Rewrite_Procedure_Call (N : Node_Id; Blk : Node_Id);
procedure Make_Exit_Label is
begin
if No (Exit_Lab) then
Lab_Id := Make_Identifier (Loc, New_Internal_Name ('L'));
Set_Entity (Lab_Id,
Make_Defining_Identifier (Loc, Chars (Lab_Id)));
Exit_Lab := Make_Label (Loc, Lab_Id);
Lab_Decl :=
Make_Implicit_Label_Declaration (Loc,
Defining_Identifier => Entity (Lab_Id),
Label_Construct => Exit_Lab);
end if;
end Make_Exit_Label;
function Process_Formals (N : Node_Id) return Traverse_Result is
A : Entity_Id;
E : Entity_Id;
Ret : Node_Id;
begin
if Is_Entity_Name (N)
and then Present (Entity (N))
then
E := Entity (N);
if Is_Formal (E)
and then Scope (E) = Subp
then
A := Renamed_Object (E);
if Is_Entity_Name (A) then
Rewrite (N, New_Occurrence_Of (Entity (A), Loc));
elsif Nkind (A) = N_Defining_Identifier then
Rewrite (N, New_Occurrence_Of (A, Loc));
else Rewrite (N, New_Copy (A));
end if;
end if;
return Skip;
elsif Nkind (N) = N_Return_Statement then
if No (Expression (N)) then
Make_Exit_Label;
Rewrite (N, Make_Goto_Statement (Loc,
Name => New_Copy (Lab_Id)));
else
if Nkind (Parent (N)) = N_Handled_Sequence_Of_Statements
and then Nkind (Parent (Parent (N))) = N_Subprogram_Body
then
null;
else
Num_Ret := Num_Ret + 1;
Make_Exit_Label;
end if;
if Nkind (Expression (N)) = N_Aggregate
or else Nkind (Expression (N)) = N_Null
then
Ret :=
Make_Qualified_Expression (Sloc (N),
Subtype_Mark => New_Occurrence_Of (Ret_Type, Sloc (N)),
Expression => Relocate_Node (Expression (N)));
else
Ret :=
Unchecked_Convert_To
(Ret_Type, Relocate_Node (Expression (N)));
end if;
if Nkind (Targ) = N_Defining_Identifier then
Rewrite (N,
Make_Assignment_Statement (Loc,
Name => New_Occurrence_Of (Targ, Loc),
Expression => Ret));
else
Rewrite (N,
Make_Assignment_Statement (Loc,
Name => New_Copy (Targ),
Expression => Ret));
end if;
Set_Assignment_OK (Name (N));
if Present (Exit_Lab) then
Insert_After (N,
Make_Goto_Statement (Loc,
Name => New_Copy (Lab_Id)));
end if;
end if;
return OK;
else
return OK;
end if;
end Process_Formals;
procedure Replace_Formals is new Traverse_Proc (Process_Formals);
procedure Rewrite_Function_Call (N : Node_Id; Blk : Node_Id) is
HSS : Node_Id := Handled_Statement_Sequence (Blk);
Fst : Node_Id := First (Statements (HSS));
begin
if Is_Empty_List (Declarations (Blk))
and then Nkind (Fst) = N_Assignment_Statement
and then No (Next (Fst))
then
if Nkind (N) = N_Identifier
and then Nkind (Parent (Entity (N))) = N_Object_Declaration
then
Rewrite (Parent (Entity (N)), Make_Null_Statement (Loc));
end if;
Rewrite (N, Expression (Fst));
elsif Nkind (N) = N_Identifier
and then Nkind (Parent (Entity (N))) = N_Object_Declaration
then
Insert_After (Parent (Entity (N)), Blk);
elsif Nkind (Parent (N)) = N_Assignment_Statement
and then Is_Entity_Name (Name (Parent (N)))
then
Rewrite (Parent (N), Blk);
elsif Nkind (Parent (N)) = N_Object_Declaration then
Set_Expression (Parent (N), Empty);
Insert_After (Parent (N), Blk);
end if;
end Rewrite_Function_Call;
procedure Rewrite_Procedure_Call (N : Node_Id; Blk : Node_Id) is
HSS : Node_Id := Handled_Statement_Sequence (Blk);
begin
if Is_Empty_List (Declarations (Blk)) then
Insert_List_After (N, Statements (HSS));
Rewrite (N, Make_Null_Statement (Loc));
else
Rewrite (N, Blk);
end if;
end Rewrite_Procedure_Call;
begin
if Nkind (Orig_Bod) = N_Defining_Identifier then
Set_Name (N, New_Occurrence_Of (Orig_Bod, Loc));
return;
end if;
Save_Env (Subp, Empty);
Set_Copied_Sloc (N, Defining_Entity (Orig_Bod));
Bod :=
Copy_Generic_Node (Orig_Bod, Empty, Instantiating => True);
Blk :=
Make_Block_Statement (Loc,
Declarations => Declarations (Bod),
Handled_Statement_Sequence => Handled_Statement_Sequence (Bod));
if No (Declarations (Bod)) then
Set_Declarations (Blk, New_List);
end if;
if Present (Orig_Subp)
and then Orig_Subp /= Subp
then
Ret_Type := Etype (Orig_Subp);
else
Ret_Type := Etype (Subp);
end if;
F := First_Formal (Subp);
A := First_Actual (N);
while Present (F) loop
if Present (Renamed_Object (F)) then
Error_Msg_N (" cannot inline call to recursive subprogram", N);
return;
end if;
if Is_Class_Wide_Type (Etype (F))
or else (Is_Access_Type (Etype (F))
and then
Is_Class_Wide_Type (Designated_Type (Etype (F))))
then
Temp_Typ := Etype (F);
elsif Base_Type (Etype (F)) = Base_Type (Etype (A))
and then Etype (F) /= Base_Type (Etype (F))
then
Temp_Typ := Etype (F);
else
Temp_Typ := Etype (A);
end if;
if (not Is_Entity_Name (A)
and then Nkind (A) /= N_Integer_Literal
and then Nkind (A) /= N_Real_Literal)
or else Is_Scalar_Type (Etype (A))
then
Temp :=
Make_Defining_Identifier (Loc,
Chars => New_Internal_Name ('C'));
if Nkind (A) = N_Type_Conversion
and then
(Ekind (F) = E_In_Out_Parameter
or else not Is_Tagged_Type (Etype (F)))
then
New_A := Make_Unchecked_Type_Conversion (Loc,
Subtype_Mark => New_Occurrence_Of (Etype (F), Loc),
Expression => Relocate_Node (Expression (A)));
elsif Etype (F) /= Etype (A) then
New_A := Unchecked_Convert_To (Etype (F), Relocate_Node (A));
Temp_Typ := Etype (F);
else
New_A := Relocate_Node (A);
end if;
Set_Sloc (New_A, Sloc (N));
if Ekind (F) = E_In_Parameter
and then not Is_Limited_Type (Etype (A))
then
Decl :=
Make_Object_Declaration (Loc,
Defining_Identifier => Temp,
Constant_Present => True,
Object_Definition => New_Occurrence_Of (Temp_Typ, Loc),
Expression => New_A);
else
Decl :=
Make_Object_Renaming_Declaration (Loc,
Defining_Identifier => Temp,
Subtype_Mark => New_Occurrence_Of (Temp_Typ, Loc),
Name => New_A);
end if;
Prepend (Decl, Declarations (Blk));
Set_Renamed_Object (F, Temp);
else
if Etype (F) /= Etype (A) then
Set_Renamed_Object
(F, Unchecked_Convert_To (Etype (F), Relocate_Node (A)));
else
Set_Renamed_Object (F, A);
end if;
end if;
Next_Formal (F);
Next_Actual (A);
end loop;
if Ekind (Subp) = E_Function then
if Nkind (Parent (N)) = N_Assignment_Statement
and then Is_Entity_Name (Name (Parent (N)))
then
Targ := Name (Parent (N));
else
Temp :=
Make_Defining_Identifier (Loc, New_Internal_Name ('C'));
Decl :=
Make_Object_Declaration (Loc,
Defining_Identifier => Temp,
Object_Definition =>
New_Occurrence_Of (Ret_Type, Loc));
Set_No_Initialization (Decl);
Insert_Action (N, Decl);
Rewrite (N, New_Occurrence_Of (Temp, Loc));
Targ := Temp;
end if;
end if;
Replace_Formals (Blk);
Set_Parent (Blk, N);
if Present (Exit_Lab) then
if Num_Ret = 1
and then
Nkind (Last (Statements (Handled_Statement_Sequence (Blk)))) =
N_Goto_Statement
then
Remove (Last (Statements (Handled_Statement_Sequence (Blk))));
else
Append (Lab_Decl, (Declarations (Blk)));
Append (Exit_Lab, Statements (Handled_Statement_Sequence (Blk)));
end if;
end if;
declare
I_Flag : constant Boolean := In_Inlined_Body;
begin
In_Inlined_Body := True;
Analyze (Blk);
In_Inlined_Body := I_Flag;
end;
if Ekind (Subp) = E_Procedure then
Rewrite_Procedure_Call (N, Blk);
else
Rewrite_Function_Call (N, Blk);
end if;
Restore_Env;
F := First_Formal (Subp);
while Present (F) loop
Set_Renamed_Object (F, Empty);
Next_Formal (F);
end loop;
end Expand_Inlined_Call;
procedure Expand_N_Function_Call (N : Node_Id) is
Typ : constant Entity_Id := Etype (N);
function Returned_By_Reference return Boolean;
function Returned_By_Reference return Boolean is
S : Entity_Id := Current_Scope;
begin
if Is_Return_By_Reference_Type (Typ) then
return True;
elsif Nkind (Parent (N)) /= N_Return_Statement then
return False;
elsif Requires_Transient_Scope (Typ) then
while Ekind (S) /= E_Function loop
S := Scope (S);
end loop;
return Is_Constrained (Typ) = Is_Constrained (Etype (S));
else
return False;
end if;
end Returned_By_Reference;
begin
if May_Generate_Large_Temp (Typ)
and then Nkind (Parent (N)) /= N_Assignment_Statement
and then
(Nkind (Parent (N)) /= N_Object_Declaration
or else Expression (Parent (N)) /= N)
and then not Returned_By_Reference
then
declare
Loc : constant Source_Ptr := Sloc (N);
Temp_Obj : constant Entity_Id := Make_Defining_Identifier (Loc,
New_Internal_Name ('F'));
Temp_Typ : Entity_Id := Typ;
Decl : Node_Id;
A : Node_Id;
F : Entity_Id;
Proc : Entity_Id;
begin
if Is_Tagged_Type (Typ)
and then Present (Controlling_Argument (N))
then
if Nkind (Parent (N)) /= N_Procedure_Call_Statement
and then Nkind (Parent (N)) /= N_Function_Call
then
if Is_Tag_Indeterminate (N) then
Temp_Typ := Class_Wide_Type (Typ);
end if;
else
Proc := Entity (Name (Parent (N)));
F := First_Formal (Proc);
A := First_Actual (Parent (N));
while A /= N loop
Next_Formal (F);
Next_Actual (A);
end loop;
if Is_Controlling_Formal (F) then
Temp_Typ := Class_Wide_Type (Typ);
end if;
end if;
end if;
Decl :=
Make_Object_Declaration (Loc,
Defining_Identifier => Temp_Obj,
Object_Definition => New_Occurrence_Of (Temp_Typ, Loc),
Constant_Present => True,
Expression => Relocate_Node (N));
Set_Assignment_OK (Decl);
Insert_Actions (N, New_List (Decl));
Rewrite (N, New_Occurrence_Of (Temp_Obj, Loc));
end;
else
Expand_Call (N);
end if;
end Expand_N_Function_Call;
procedure Expand_N_Procedure_Call_Statement (N : Node_Id) is
begin
Expand_Call (N);
end Expand_N_Procedure_Call_Statement;
procedure Expand_N_Subprogram_Body (N : Node_Id) is
Loc : constant Source_Ptr := Sloc (N);
H : constant Node_Id := Handled_Statement_Sequence (N);
Body_Id : Entity_Id;
Spec_Id : Entity_Id;
Except_H : Node_Id;
Scop : Entity_Id;
Dec : Node_Id;
Next_Op : Node_Id;
L : List_Id;
procedure Add_Return (S : List_Id);
procedure Add_Return (S : List_Id) is
Last_S : constant Node_Id := Last (S);
begin
if not Is_Transfer (Last_S) then
Append_To (S, Make_Return_Statement (Sloc (Last_S)));
end if;
end Add_Return;
begin
if Is_Non_Empty_List (Declarations (N)) then
L := Declarations (N);
else
L := Statements (Handled_Statement_Sequence (N));
end if;
if Is_Non_Empty_List (L) then
Generate_Poll_Call (First (L));
end if;
Body_Id := Defining_Entity (N);
if Present (Corresponding_Spec (N)) then
Spec_Id := Corresponding_Spec (N);
else
Spec_Id := Body_Id;
end if;
if Is_Pure (Spec_Id)
and then Is_Subprogram (Spec_Id)
and then not Has_Pragma_Pure_Function (Spec_Id)
then
declare
F : Entity_Id := First_Formal (Spec_Id);
begin
while Present (F) loop
if Is_RTE (Root_Type (Etype (F)), RE_Address) then
Set_Is_Pure (Spec_Id, False);
if Spec_Id /= Body_Id then
Set_Is_Pure (Body_Id, False);
end if;
exit;
end if;
Next_Formal (F);
end loop;
end;
end if;
if Init_Or_Norm_Scalars and then Is_Subprogram (Spec_Id) then
declare
F : Entity_Id := First_Formal (Spec_Id);
V : constant Boolean := Validity_Checks_On;
begin
Validity_Checks_On := False;
while Present (F) loop
if Is_Scalar_Type (Etype (F))
and then Ekind (F) = E_Out_Parameter
then
Insert_Before_And_Analyze (First (L),
Make_Assignment_Statement (Loc,
Name => New_Occurrence_Of (F, Loc),
Expression => Get_Simple_Init_Val (Etype (F), Loc)));
end if;
Next_Formal (F);
end loop;
Validity_Checks_On := V;
end;
end if;
if Present (Corresponding_Spec (N)) then
Set_Elaboration_Flag (N, Spec_Id);
if Convention (Spec_Id) = Convention_Stubbed
or else Is_Eliminated (Spec_Id)
then
Set_Declarations (N, Empty_List);
Set_Handled_Statement_Sequence (N,
Make_Handled_Sequence_Of_Statements (Loc,
Statements => New_List (
Make_Null_Statement (Loc))));
return;
end if;
end if;
Scop := Scope (Spec_Id);
declare
Typ : constant Entity_Id := Etype (Spec_Id);
Utyp : constant Entity_Id := Underlying_Type (Typ);
begin
if not Acts_As_Spec (N)
and then Nkind (Parent (Parent (Spec_Id))) /=
N_Subprogram_Body_Stub
then
null;
elsif Is_Return_By_Reference_Type (Typ) then
Set_Returns_By_Ref (Spec_Id);
elsif Present (Utyp) and then Controlled_Type (Utyp) then
Set_Returns_By_Ref (Spec_Id);
end if;
end;
if Ekind (Spec_Id) = E_Procedure
or else Ekind (Spec_Id) = E_Generic_Procedure
then
Add_Return (Statements (H));
if Present (Exception_Handlers (H)) then
Except_H := First_Non_Pragma (Exception_Handlers (H));
while Present (Except_H) loop
Add_Return (Statements (Except_H));
Next_Non_Pragma (Except_H);
end loop;
end if;
elsif Has_Missing_Return (Spec_Id) then
declare
Hloc : constant Source_Ptr := Sloc (H);
Blok : constant Node_Id :=
Make_Block_Statement (Hloc,
Handled_Statement_Sequence => H);
Rais : constant Node_Id :=
Make_Raise_Program_Error (Hloc,
Reason => PE_Missing_Return);
begin
Set_Handled_Statement_Sequence (N,
Make_Handled_Sequence_Of_Statements (Hloc,
Statements => New_List (Blok, Rais)));
New_Scope (Spec_Id);
Analyze (Blok);
Analyze (Rais);
Pop_Scope;
end;
end if;
if Is_List_Member (N)
and then Present (Parent (List_Containing (N)))
and then Nkind (Parent (List_Containing (N))) = N_Protected_Body
then
Add_Discriminal_Declarations
(Declarations (N), Scop, Name_uObject, Loc);
Add_Private_Declarations (Declarations (N), Scop, Name_uObject, Loc);
Next_Op := Next_Protected_Operation (N);
if Present (Next_Op) then
Dec := Parent (Base_Type (Scop));
Set_Privals (Dec, Next_Op, Loc);
Set_Discriminals (Dec);
end if;
end if;
if Ekind (Spec_Id) = E_Procedure
and then Has_Recursive_Call (Spec_Id)
and then not Storage_Checks_Suppressed (Spec_Id)
then
Detect_Infinite_Recursion (N, Spec_Id);
end if;
if Ekind (Spec_Id) = E_Procedure and then Normalize_Scalars then
declare
Floc : Source_Ptr;
Formal : Entity_Id;
Stm : Node_Id;
begin
Formal := First_Formal (Spec_Id);
while Present (Formal) loop
Floc := Sloc (Formal);
if Ekind (Formal) = E_Out_Parameter
and then Is_Scalar_Type (Etype (Formal))
then
Stm :=
Make_Assignment_Statement (Floc,
Name => New_Occurrence_Of (Formal, Floc),
Expression =>
Get_Simple_Init_Val (Etype (Formal), Floc));
Prepend (Stm, Declarations (N));
Analyze (Stm);
end if;
Next_Formal (Formal);
end loop;
end;
end if;
if Is_Subprogram (Spec_Id)
and then not Delay_Subprogram_Descriptors (Spec_Id)
then
Generate_Subprogram_Descriptor_For_Subprogram (N, Spec_Id);
end if;
Qualify_Entity_Names (N);
end Expand_N_Subprogram_Body;
procedure Expand_N_Subprogram_Body_Stub (N : Node_Id) is
begin
if Present (Corresponding_Body (N)) then
Expand_N_Subprogram_Body (
Unit_Declaration_Node (Corresponding_Body (N)));
end if;
end Expand_N_Subprogram_Body_Stub;
procedure Expand_N_Subprogram_Declaration (N : Node_Id) is
Loc : constant Source_Ptr := Sloc (N);
Subp : Entity_Id := Defining_Entity (N);
Scop : Entity_Id := Scope (Subp);
Prot_Sub : Entity_Id;
Prot_Bod : Node_Id;
begin
if Is_List_Member (N)
and then Present (Parent (List_Containing (N)))
and then Nkind (Parent (List_Containing (N))) = N_Protected_Body
and then Is_Protected_Type (Scop)
then
if No (Protected_Body_Subprogram (Subp)) then
Prot_Sub :=
Make_Subprogram_Declaration (Loc,
Specification =>
Build_Protected_Sub_Specification
(N, Scop, Unprotected => True));
Prot_Bod := Parent (List_Containing (N));
if Nkind (Parent (Prot_Bod)) = N_Subunit then
Prot_Bod := Corresponding_Stub (Parent (Prot_Bod));
end if;
Insert_Before (Prot_Bod, Prot_Sub);
New_Scope (Scope (Scop));
Analyze (Prot_Sub);
Set_Protected_Body_Subprogram (Subp,
Defining_Unit_Name (Specification (Prot_Sub)));
Pop_Scope;
end if;
end if;
end Expand_N_Subprogram_Declaration;
function Expand_Protected_Object_Reference
(N : Node_Id;
Scop : Entity_Id)
return Node_Id
is
Loc : constant Source_Ptr := Sloc (N);
Corr : Entity_Id;
Rec : Node_Id;
Param : Entity_Id;
Proc : Entity_Id;
begin
Rec := Make_Identifier (Loc, Name_uObject);
Set_Etype (Rec, Corresponding_Record_Type (Scop));
Proc := Current_Scope;
while Present (Proc)
and then Scope (Proc) /= Scop
loop
Proc := Scope (Proc);
end loop;
Corr := Protected_Body_Subprogram (Proc);
if No (Corr) then
return Empty;
end if;
Param :=
Defining_Identifier
(First (Parameter_Specifications (Parent (Corr))));
if Is_Subprogram (Proc)
and then Proc /= Corr
then
Set_Entity (Rec, Param);
Set_Analyzed (Rec);
else
declare
Decls : List_Id;
Obj_Ptr : Entity_Id := Make_Defining_Identifier
(Loc, New_Internal_Name ('T'));
begin
Decls := New_List (
Make_Full_Type_Declaration (Loc,
Defining_Identifier => Obj_Ptr,
Type_Definition =>
Make_Access_To_Object_Definition (Loc,
Subtype_Indication =>
New_Reference_To
(Corresponding_Record_Type (Scop), Loc))));
Insert_Actions (N, Decls);
Insert_Actions (N, Freeze_Entity (Obj_Ptr, Sloc (N)));
Rec :=
Make_Explicit_Dereference (Loc,
Unchecked_Convert_To (Obj_Ptr,
New_Occurrence_Of (Param, Loc)));
Set_Parent (Rec, N);
Analyze (Rec);
end;
end if;
return Rec;
end Expand_Protected_Object_Reference;
procedure Expand_Protected_Subprogram_Call
(N : Node_Id;
Subp : Entity_Id;
Scop : Entity_Id)
is
Rec : Node_Id;
begin
if not In_Open_Scopes (Scop)
or else not Is_Entity_Name (Name (N))
then
if Nkind (Name (N)) = N_Selected_Component then
Rec := Prefix (Name (N));
else
pragma Assert (Nkind (Name (N)) = N_Indexed_Component);
Rec := Prefix (Prefix (Name (N)));
end if;
Build_Protected_Subprogram_Call (N,
Name => New_Occurrence_Of (Subp, Sloc (N)),
Rec => Convert_Concurrent (Rec, Etype (Rec)),
External => True);
else
Rec := Expand_Protected_Object_Reference (N, Scop);
if No (Rec) then
return;
end if;
Build_Protected_Subprogram_Call (N,
Name => Name (N),
Rec => Rec,
External => False);
end if;
Analyze (N);
if Ekind (Subp) = E_Function then
Freeze_Expression (Name (N));
end if;
end Expand_Protected_Subprogram_Call;
procedure Freeze_Subprogram (N : Node_Id) is
E : constant Entity_Id := Entity (N);
begin
if Is_Dispatching_Operation (E)
and then not Is_Abstract (E)
and then Present (DTC_Entity (E))
and then not Is_CPP_Class (Scope (DTC_Entity (E)))
and then not Java_VM
then
Check_Overriding_Operation (E);
Insert_After (N, Fill_DT_Entry (Sloc (N), E));
end if;
declare
Typ : constant Entity_Id := Etype (E);
Utyp : constant Entity_Id := Underlying_Type (Typ);
begin
if Is_Return_By_Reference_Type (Typ) then
Set_Returns_By_Ref (E);
elsif Present (Utyp) and then Controlled_Type (Utyp) then
Set_Returns_By_Ref (E);
end if;
end;
end Freeze_Subprogram;
end Exp_Ch6;