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From: Pierre-Marie de Rodat <pmderodat@gcc.gnu.org> To: gcc-cvs@gcc.gnu.org Subject: [gcc r12-6232] [Ada] Simplify making of null procedure wrappers Date: Wed, 5 Jan 2022 11:34:02 +0000 (GMT) [thread overview] Message-ID: <20220105113402.BEB233858431@sourceware.org> (raw) https://gcc.gnu.org/g:54403a8130c126cc3e901341dac64afbc7273347 commit r12-6232-g54403a8130c126cc3e901341dac64afbc7273347 Author: Piotr Trojanek <trojanek@adacore.com> Date: Tue Nov 30 21:54:51 2021 +0100 [Ada] Simplify making of null procedure wrappers gcc/ada/ * exp_ch3.adb (Make_Null_Procedure_Specs): Simplify by reusing Copy_Subprogram_Spec. * sem_util.ads (Copy_Subprogram_Spec): Add New_Sloc parameter. * sem_util.adb (Copy_Subprogram_Spec): Pass New_Sloc to New_Copy_Tree. Diff: --- gcc/ada/exp_ch3.adb | 74 ++++++++++++++++++++++------------------------------ gcc/ada/sem_util.adb | 7 +++-- gcc/ada/sem_util.ads | 7 +++-- 3 files changed, 41 insertions(+), 47 deletions(-) diff --git a/gcc/ada/exp_ch3.adb b/gcc/ada/exp_ch3.adb index 946439005a9..e1e323227c1 100644 --- a/gcc/ada/exp_ch3.adb +++ b/gcc/ada/exp_ch3.adb @@ -10265,8 +10265,8 @@ package body Exp_Ch3 is Decl_List : constant List_Id := New_List; Loc : constant Source_Ptr := Sloc (Tag_Typ); Formal : Entity_Id; - Formal_List : List_Id; New_Param_Spec : Node_Id; + New_Spec : Node_Id; Parent_Subp : Entity_Id; Prim_Elmt : Elmt_Id; Subp : Entity_Id; @@ -10285,59 +10285,47 @@ package body Exp_Ch3 is if Present (Parent_Subp) and then Is_Null_Interface_Primitive (Parent_Subp) then - Formal := First_Formal (Subp); - - if Present (Formal) then - Formal_List := New_List; - - while Present (Formal) loop + -- The null procedure spec is copied from the inherited procedure, + -- except for the IS NULL (which must be added) and the overriding + -- indicators (which must be removed, if present). - -- Copy the parameter spec including default expressions + New_Spec := + Copy_Subprogram_Spec (Subprogram_Specification (Subp), Loc); - New_Param_Spec := - New_Copy_Tree (Parent (Formal), New_Sloc => Loc); + Set_Null_Present (New_Spec, True); + Set_Must_Override (New_Spec, False); + Set_Must_Not_Override (New_Spec, False); - -- Generate a new defining identifier for the new formal. - -- Required because New_Copy_Tree does not duplicate - -- semantic fields (except itypes). + Formal := First_Formal (Subp); + New_Param_Spec := First (Parameter_Specifications (New_Spec)); - Set_Defining_Identifier (New_Param_Spec, - Make_Defining_Identifier (Sloc (Formal), - Chars => Chars (Formal))); + while Present (Formal) loop - -- For controlling arguments we must change their parameter - -- type to reference the tagged type (instead of the - -- interface type). + -- For controlling arguments we must change their parameter + -- type to reference the tagged type (instead of the interface + -- type). - if Is_Controlling_Formal (Formal) then - if Nkind (Parameter_Type (Parent (Formal))) = N_Identifier - then - Set_Parameter_Type (New_Param_Spec, - New_Occurrence_Of (Tag_Typ, Loc)); - - else pragma Assert - (Nkind (Parameter_Type (Parent (Formal))) = - N_Access_Definition); - Set_Subtype_Mark (Parameter_Type (New_Param_Spec), - New_Occurrence_Of (Tag_Typ, Loc)); - end if; + if Is_Controlling_Formal (Formal) then + if Nkind (Parameter_Type (Parent (Formal))) = N_Identifier + then + Set_Parameter_Type (New_Param_Spec, + New_Occurrence_Of (Tag_Typ, Loc)); + + else pragma Assert + (Nkind (Parameter_Type (Parent (Formal))) = + N_Access_Definition); + Set_Subtype_Mark (Parameter_Type (New_Param_Spec), + New_Occurrence_Of (Tag_Typ, Loc)); end if; + end if; - Append (New_Param_Spec, Formal_List); - - Next_Formal (Formal); - end loop; - else - Formal_List := No_List; - end if; + Next_Formal (Formal); + Next (New_Param_Spec); + end loop; Append_To (Decl_List, Make_Subprogram_Declaration (Loc, - Make_Procedure_Specification (Loc, - Defining_Unit_Name => - Make_Defining_Identifier (Loc, Chars (Subp)), - Parameter_Specifications => Formal_List, - Null_Present => True))); + Specification => New_Spec)); end if; Next_Elmt (Prim_Elmt); diff --git a/gcc/ada/sem_util.adb b/gcc/ada/sem_util.adb index 882eb23b402..49a58e3c615 100644 --- a/gcc/ada/sem_util.adb +++ b/gcc/ada/sem_util.adb @@ -6871,7 +6871,10 @@ package body Sem_Util is -- Copy_Subprogram_Spec -- -------------------------- - function Copy_Subprogram_Spec (Spec : Node_Id) return Node_Id is + function Copy_Subprogram_Spec + (Spec : Node_Id; + New_Sloc : Source_Ptr := No_Location) return Node_Id + is Def_Id : Node_Id; Formal_Spec : Node_Id; Result : Node_Id; @@ -6880,7 +6883,7 @@ package body Sem_Util is -- The structure of the original tree must be replicated without any -- alterations. Use New_Copy_Tree for this purpose. - Result := New_Copy_Tree (Spec); + Result := New_Copy_Tree (Spec, New_Sloc => New_Sloc); -- However, the spec of a null procedure carries the corresponding null -- statement of the body (created by the parser), and this cannot be diff --git a/gcc/ada/sem_util.ads b/gcc/ada/sem_util.ads index b2bd9d580a4..c37038f7ae1 100644 --- a/gcc/ada/sem_util.ads +++ b/gcc/ada/sem_util.ads @@ -623,10 +623,13 @@ package Sem_Util is -- aspect specifications. If From has no aspects, the routine has no -- effect. - function Copy_Subprogram_Spec (Spec : Node_Id) return Node_Id; + function Copy_Subprogram_Spec + (Spec : Node_Id; + New_Sloc : Source_Ptr := No_Location) return Node_Id; -- Replicate a function or a procedure specification denoted by Spec. The -- resulting tree is an exact duplicate of the original tree. New entities - -- are created for the unit name and the formal parameters. + -- are created for the unit name and the formal parameters. For definition + -- of New_Sloc, see the comment for New_Copy_Tree. function Corresponding_Generic_Type (T : Entity_Id) return Entity_Id; -- If a type is a generic actual type, return the corresponding formal in
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