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jeremybenn |
------------------------------------------------------------------------------
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-- --
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-- GNAT COMPILER COMPONENTS --
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-- --
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-- E X P _ A T A G --
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-- --
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-- S p e c --
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-- --
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-- Copyright (C) 2006-2011, Free Software Foundation, Inc. --
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-- --
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-- GNAT is free software; you can redistribute it and/or modify it under --
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-- terms of the GNU General Public License as published by the Free Soft- --
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-- ware Foundation; either version 3, or (at your option) any later ver- --
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-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
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-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
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-- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
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-- for more details. You should have received a copy of the GNU General --
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-- Public License distributed with GNAT; see file COPYING3. If not, go to --
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-- http://www.gnu.org/licenses for a complete copy of the license. --
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-- --
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-- GNAT was originally developed by the GNAT team at New York University. --
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-- Extensive contributions were provided by Ada Core Technologies Inc. --
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-- --
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------------------------------------------------------------------------------
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with Atree; use Atree;
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with Einfo; use Einfo;
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with Elists; use Elists;
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with Exp_Disp; use Exp_Disp;
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with Exp_Util; use Exp_Util;
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with Namet; use Namet;
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with Nlists; use Nlists;
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with Nmake; use Nmake;
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with Opt; use Opt;
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with Rtsfind; use Rtsfind;
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with Sinfo; use Sinfo;
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with Sem_Aux; use Sem_Aux;
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with Sem_Disp; use Sem_Disp;
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with Sem_Util; use Sem_Util;
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with Stand; use Stand;
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with Snames; use Snames;
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with Tbuild; use Tbuild;
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package body Exp_Atag is
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-----------------------
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-- Local Subprograms --
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-----------------------
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function Build_DT
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(Loc : Source_Ptr;
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Tag_Node : Node_Id) return Node_Id;
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-- Build code that displaces the Tag to reference the base of the wrapper
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-- record
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--
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-- Generates:
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-- To_Dispatch_Table_Ptr
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-- (To_Address (Tag_Node) - Tag_Node.Prims_Ptr'Position);
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function Build_TSD
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(Loc : Source_Ptr;
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Tag_Node_Addr : Node_Id) return Node_Id;
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-- Build code that retrieves the address of the record containing the Type
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-- Specific Data generated by GNAT.
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--
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-- Generate: To_Type_Specific_Data_Ptr
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-- (To_Addr_Ptr (Tag_Node_Addr - Typeinfo_Offset).all);
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------------------------------------------------
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-- Build_Common_Dispatching_Select_Statements --
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------------------------------------------------
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procedure Build_Common_Dispatching_Select_Statements
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(Typ : Entity_Id;
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Stmts : List_Id)
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is
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Loc : constant Source_Ptr := Sloc (Typ);
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Tag_Node : Node_Id;
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begin
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-- Generate:
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-- C := get_prim_op_kind (tag! (<type>VP), S);
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-- where C is the out parameter capturing the call kind and S is the
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-- dispatch table slot number.
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if Tagged_Type_Expansion then
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Tag_Node :=
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Unchecked_Convert_To (RTE (RE_Tag),
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New_Reference_To
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(Node (First_Elmt (Access_Disp_Table (Typ))), Loc));
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else
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Tag_Node :=
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Make_Attribute_Reference (Loc,
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Prefix => New_Reference_To (Typ, Loc),
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Attribute_Name => Name_Tag);
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end if;
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Append_To (Stmts,
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Make_Assignment_Statement (Loc,
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Name => Make_Identifier (Loc, Name_uC),
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Expression =>
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Make_Function_Call (Loc,
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Name => New_Occurrence_Of (RTE (RE_Get_Prim_Op_Kind), Loc),
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Parameter_Associations => New_List (
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Tag_Node,
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Make_Identifier (Loc, Name_uS)))));
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-- Generate:
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-- if C = POK_Procedure
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-- or else C = POK_Protected_Procedure
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-- or else C = POK_Task_Procedure;
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-- then
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-- F := True;
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-- return;
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-- where F is the out parameter capturing the status of a potential
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-- entry call.
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Append_To (Stmts,
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Make_If_Statement (Loc,
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Condition =>
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Make_Or_Else (Loc,
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Left_Opnd =>
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Make_Op_Eq (Loc,
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Left_Opnd => Make_Identifier (Loc, Name_uC),
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Right_Opnd =>
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New_Reference_To (RTE (RE_POK_Procedure), Loc)),
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Right_Opnd =>
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Make_Or_Else (Loc,
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Left_Opnd =>
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Make_Op_Eq (Loc,
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Left_Opnd => Make_Identifier (Loc, Name_uC),
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Right_Opnd =>
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New_Reference_To
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(RTE (RE_POK_Protected_Procedure), Loc)),
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Right_Opnd =>
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Make_Op_Eq (Loc,
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Left_Opnd => Make_Identifier (Loc, Name_uC),
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Right_Opnd =>
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New_Reference_To
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(RTE (RE_POK_Task_Procedure), Loc)))),
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Then_Statements =>
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New_List (
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Make_Assignment_Statement (Loc,
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Name => Make_Identifier (Loc, Name_uF),
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Expression => New_Reference_To (Standard_True, Loc)),
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Make_Simple_Return_Statement (Loc))));
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end Build_Common_Dispatching_Select_Statements;
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-------------------------
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-- Build_CW_Membership --
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-------------------------
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procedure Build_CW_Membership
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(Loc : Source_Ptr;
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Obj_Tag_Node : in out Node_Id;
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Typ_Tag_Node : Node_Id;
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Related_Nod : Node_Id;
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New_Node : out Node_Id)
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is
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Tag_Addr : constant Entity_Id := Make_Temporary (Loc, 'D', Obj_Tag_Node);
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Obj_TSD : constant Entity_Id := Make_Temporary (Loc, 'D');
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Typ_TSD : constant Entity_Id := Make_Temporary (Loc, 'D');
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Index : constant Entity_Id := Make_Temporary (Loc, 'D');
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begin
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-- Generate:
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-- Tag_Addr : constant Tag := Address!(Obj_Tag);
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-- Obj_TSD : constant Type_Specific_Data_Ptr
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-- := Build_TSD (Tag_Addr);
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-- Typ_TSD : constant Type_Specific_Data_Ptr
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-- := Build_TSD (Address!(Typ_Tag));
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-- Index : constant Integer := Obj_TSD.Idepth - Typ_TSD.Idepth
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-- Index > 0 and then Obj_TSD.Tags_Table (Index) = Typ'Tag
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Insert_Action (Related_Nod,
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Make_Object_Declaration (Loc,
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Defining_Identifier => Tag_Addr,
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Constant_Present => True,
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Object_Definition => New_Reference_To (RTE (RE_Address), Loc),
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Expression => Unchecked_Convert_To
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(RTE (RE_Address), Obj_Tag_Node)));
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-- Unchecked_Convert_To relocates Obj_Tag_Node and therefore we must
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-- update it.
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Obj_Tag_Node := Expression (Expression (Parent (Tag_Addr)));
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Insert_Action (Related_Nod,
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Make_Object_Declaration (Loc,
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Defining_Identifier => Obj_TSD,
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Constant_Present => True,
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Object_Definition => New_Reference_To
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(RTE (RE_Type_Specific_Data_Ptr), Loc),
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Expression => Build_TSD (Loc, New_Reference_To (Tag_Addr, Loc))));
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Insert_Action (Related_Nod,
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Make_Object_Declaration (Loc,
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Defining_Identifier => Typ_TSD,
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Constant_Present => True,
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Object_Definition => New_Reference_To
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(RTE (RE_Type_Specific_Data_Ptr), Loc),
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Expression => Build_TSD (Loc,
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Unchecked_Convert_To (RTE (RE_Address),
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Typ_Tag_Node))));
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Insert_Action (Related_Nod,
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Make_Object_Declaration (Loc,
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Defining_Identifier => Index,
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Constant_Present => True,
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Object_Definition => New_Occurrence_Of (Standard_Integer, Loc),
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Expression =>
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Make_Op_Subtract (Loc,
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Left_Opnd =>
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Make_Selected_Component (Loc,
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Prefix => New_Reference_To (Obj_TSD, Loc),
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Selector_Name =>
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New_Reference_To
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(RTE_Record_Component (RE_Idepth), Loc)),
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Right_Opnd =>
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Make_Selected_Component (Loc,
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Prefix => New_Reference_To (Typ_TSD, Loc),
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Selector_Name =>
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New_Reference_To
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(RTE_Record_Component (RE_Idepth), Loc)))));
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New_Node :=
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Make_And_Then (Loc,
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Left_Opnd =>
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Make_Op_Ge (Loc,
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Left_Opnd => New_Occurrence_Of (Index, Loc),
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Right_Opnd => Make_Integer_Literal (Loc, Uint_0)),
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Right_Opnd =>
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Make_Op_Eq (Loc,
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Left_Opnd =>
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Make_Indexed_Component (Loc,
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Prefix =>
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Make_Selected_Component (Loc,
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Prefix => New_Reference_To (Obj_TSD, Loc),
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Selector_Name =>
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New_Reference_To
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(RTE_Record_Component (RE_Tags_Table), Loc)),
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Expressions =>
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New_List (New_Occurrence_Of (Index, Loc))),
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Right_Opnd => Typ_Tag_Node));
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end Build_CW_Membership;
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--------------
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-- Build_DT --
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--------------
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function Build_DT
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(Loc : Source_Ptr;
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Tag_Node : Node_Id) return Node_Id
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is
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begin
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return
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Make_Function_Call (Loc,
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Name => New_Reference_To (RTE (RE_DT), Loc),
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Parameter_Associations => New_List (
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Unchecked_Convert_To (RTE (RE_Tag), Tag_Node)));
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end Build_DT;
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----------------------------
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-- Build_Get_Access_Level --
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----------------------------
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function Build_Get_Access_Level
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(Loc : Source_Ptr;
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Tag_Node : Node_Id) return Node_Id
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is
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begin
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return
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Make_Selected_Component (Loc,
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Prefix =>
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Build_TSD (Loc,
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Unchecked_Convert_To (RTE (RE_Address), Tag_Node)),
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Selector_Name =>
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New_Reference_To
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(RTE_Record_Component (RE_Access_Level), Loc));
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end Build_Get_Access_Level;
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-------------------------
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-- Build_Get_Alignment --
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-------------------------
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function Build_Get_Alignment
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(Loc : Source_Ptr;
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Tag_Node : Node_Id) return Node_Id
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is
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begin
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return
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Make_Selected_Component (Loc,
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Prefix =>
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Build_TSD (Loc, Unchecked_Convert_To (RTE (RE_Address), Tag_Node)),
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Selector_Name =>
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New_Reference_To (RTE_Record_Component (RE_Alignment), Loc));
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end Build_Get_Alignment;
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------------------------------------------
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-- Build_Get_Predefined_Prim_Op_Address --
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311 |
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------------------------------------------
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procedure Build_Get_Predefined_Prim_Op_Address
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(Loc : Source_Ptr;
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Position : Uint;
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Tag_Node : in out Node_Id;
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New_Node : out Node_Id)
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318 |
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is
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Ctrl_Tag : Node_Id;
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begin
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Ctrl_Tag := Unchecked_Convert_To (RTE (RE_Address), Tag_Node);
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-- Unchecked_Convert_To relocates the controlling tag node and therefore
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-- we must update it.
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Tag_Node := Expression (Ctrl_Tag);
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329 |
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-- Build code that retrieves the address of the dispatch table
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-- containing the predefined Ada primitives:
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--
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332 |
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-- Generate:
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333 |
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-- To_Predef_Prims_Table_Ptr
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-- (To_Addr_Ptr (To_Address (Tag) - Predef_Prims_Offset).all);
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335 |
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336 |
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New_Node :=
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Make_Indexed_Component (Loc,
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Prefix =>
|
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Unchecked_Convert_To (RTE (RE_Predef_Prims_Table_Ptr),
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Make_Explicit_Dereference (Loc,
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Unchecked_Convert_To (RTE (RE_Addr_Ptr),
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Make_Function_Call (Loc,
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Name =>
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Make_Expanded_Name (Loc,
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345 |
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Chars => Name_Op_Subtract,
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Prefix =>
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347 |
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New_Reference_To
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(RTU_Entity (System_Storage_Elements), Loc),
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Selector_Name =>
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Make_Identifier (Loc, Name_Op_Subtract)),
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Parameter_Associations => New_List (
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352 |
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Ctrl_Tag,
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353 |
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New_Reference_To
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354 |
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(RTE (RE_DT_Predef_Prims_Offset), Loc)))))),
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Expressions =>
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New_List (Make_Integer_Literal (Loc, Position)));
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357 |
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end Build_Get_Predefined_Prim_Op_Address;
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358 |
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359 |
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|
-----------------------------
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360 |
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-- Build_Inherit_CPP_Prims --
|
361 |
|
|
-----------------------------
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362 |
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|
363 |
|
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function Build_Inherit_CPP_Prims (Typ : Entity_Id) return List_Id is
|
364 |
|
|
Loc : constant Source_Ptr := Sloc (Typ);
|
365 |
|
|
CPP_Nb_Prims : constant Nat := CPP_Num_Prims (Typ);
|
366 |
|
|
CPP_Table : array (1 .. CPP_Nb_Prims) of Boolean := (others => False);
|
367 |
|
|
CPP_Typ : constant Entity_Id := Enclosing_CPP_Parent (Typ);
|
368 |
|
|
Result : constant List_Id := New_List;
|
369 |
|
|
Parent_Typ : constant Entity_Id := Etype (Typ);
|
370 |
|
|
E : Entity_Id;
|
371 |
|
|
Elmt : Elmt_Id;
|
372 |
|
|
Parent_Tag : Entity_Id;
|
373 |
|
|
Prim : Entity_Id;
|
374 |
|
|
Prim_Pos : Nat;
|
375 |
|
|
Typ_Tag : Entity_Id;
|
376 |
|
|
|
377 |
|
|
begin
|
378 |
|
|
pragma Assert (not Is_CPP_Class (Typ));
|
379 |
|
|
|
380 |
|
|
-- No code needed if this type has no primitives inherited from C++
|
381 |
|
|
|
382 |
|
|
if CPP_Nb_Prims = 0 then
|
383 |
|
|
return Result;
|
384 |
|
|
end if;
|
385 |
|
|
|
386 |
|
|
-- Stage 1: Inherit and override C++ slots of the primary dispatch table
|
387 |
|
|
|
388 |
|
|
-- Generate:
|
389 |
|
|
-- Typ'Tag (Prim_Pos) := Prim'Unrestricted_Access;
|
390 |
|
|
|
391 |
|
|
Parent_Tag := Node (First_Elmt (Access_Disp_Table (Parent_Typ)));
|
392 |
|
|
Typ_Tag := Node (First_Elmt (Access_Disp_Table (Typ)));
|
393 |
|
|
|
394 |
|
|
Elmt := First_Elmt (Primitive_Operations (Typ));
|
395 |
|
|
while Present (Elmt) loop
|
396 |
|
|
Prim := Node (Elmt);
|
397 |
|
|
E := Ultimate_Alias (Prim);
|
398 |
|
|
Prim_Pos := UI_To_Int (DT_Position (E));
|
399 |
|
|
|
400 |
|
|
-- Skip predefined, abstract, and eliminated primitives. Skip also
|
401 |
|
|
-- primitives not located in the C++ part of the dispatch table.
|
402 |
|
|
|
403 |
|
|
if not Is_Predefined_Dispatching_Operation (Prim)
|
404 |
|
|
and then not Is_Predefined_Dispatching_Operation (E)
|
405 |
|
|
and then not Present (Interface_Alias (Prim))
|
406 |
|
|
and then not Is_Abstract_Subprogram (E)
|
407 |
|
|
and then not Is_Eliminated (E)
|
408 |
|
|
and then Prim_Pos <= CPP_Nb_Prims
|
409 |
|
|
and then Find_Dispatching_Type (E) = Typ
|
410 |
|
|
then
|
411 |
|
|
-- Remember that this slot is used
|
412 |
|
|
|
413 |
|
|
pragma Assert (CPP_Table (Prim_Pos) = False);
|
414 |
|
|
CPP_Table (Prim_Pos) := True;
|
415 |
|
|
|
416 |
|
|
Append_To (Result,
|
417 |
|
|
Make_Assignment_Statement (Loc,
|
418 |
|
|
Name =>
|
419 |
|
|
Make_Indexed_Component (Loc,
|
420 |
|
|
Prefix =>
|
421 |
|
|
Make_Explicit_Dereference (Loc,
|
422 |
|
|
Unchecked_Convert_To
|
423 |
|
|
(Node (Last_Elmt (Access_Disp_Table (Typ))),
|
424 |
|
|
New_Reference_To (Typ_Tag, Loc))),
|
425 |
|
|
Expressions =>
|
426 |
|
|
New_List (Make_Integer_Literal (Loc, Prim_Pos))),
|
427 |
|
|
|
428 |
|
|
Expression =>
|
429 |
|
|
Unchecked_Convert_To (RTE (RE_Prim_Ptr),
|
430 |
|
|
Make_Attribute_Reference (Loc,
|
431 |
|
|
Prefix => New_Reference_To (E, Loc),
|
432 |
|
|
Attribute_Name => Name_Unrestricted_Access))));
|
433 |
|
|
end if;
|
434 |
|
|
|
435 |
|
|
Next_Elmt (Elmt);
|
436 |
|
|
end loop;
|
437 |
|
|
|
438 |
|
|
-- If all primitives have been overridden then there is no need to copy
|
439 |
|
|
-- from Typ's parent its dispatch table. Otherwise, if some primitive is
|
440 |
|
|
-- inherited from the parent we copy only the C++ part of the dispatch
|
441 |
|
|
-- table from the parent before the assignments that initialize the
|
442 |
|
|
-- overridden primitives.
|
443 |
|
|
|
444 |
|
|
-- Generate:
|
445 |
|
|
|
446 |
|
|
-- type CPP_TypG is array (1 .. CPP_Nb_Prims) ofd Prim_Ptr;
|
447 |
|
|
-- type CPP_TypH is access CPP_TypG;
|
448 |
|
|
-- CPP_TypG!(Typ_Tag).all := CPP_TypG!(Parent_Tag).all;
|
449 |
|
|
|
450 |
|
|
-- Note: There is no need to duplicate the declarations of CPP_TypG and
|
451 |
|
|
-- CPP_TypH because, for expansion of dispatching calls, these
|
452 |
|
|
-- entities are stored in the last elements of Access_Disp_Table.
|
453 |
|
|
|
454 |
|
|
for J in CPP_Table'Range loop
|
455 |
|
|
if not CPP_Table (J) then
|
456 |
|
|
Prepend_To (Result,
|
457 |
|
|
Make_Assignment_Statement (Loc,
|
458 |
|
|
Name =>
|
459 |
|
|
Make_Explicit_Dereference (Loc,
|
460 |
|
|
Unchecked_Convert_To
|
461 |
|
|
(Node (Last_Elmt (Access_Disp_Table (CPP_Typ))),
|
462 |
|
|
New_Reference_To (Typ_Tag, Loc))),
|
463 |
|
|
Expression =>
|
464 |
|
|
Make_Explicit_Dereference (Loc,
|
465 |
|
|
Unchecked_Convert_To
|
466 |
|
|
(Node (Last_Elmt (Access_Disp_Table (CPP_Typ))),
|
467 |
|
|
New_Reference_To (Parent_Tag, Loc)))));
|
468 |
|
|
exit;
|
469 |
|
|
end if;
|
470 |
|
|
end loop;
|
471 |
|
|
|
472 |
|
|
-- Stage 2: Inherit and override C++ slots of secondary dispatch tables
|
473 |
|
|
|
474 |
|
|
declare
|
475 |
|
|
Iface : Entity_Id;
|
476 |
|
|
Iface_Nb_Prims : Nat;
|
477 |
|
|
Parent_Ifaces_List : Elist_Id;
|
478 |
|
|
Parent_Ifaces_Comp_List : Elist_Id;
|
479 |
|
|
Parent_Ifaces_Tag_List : Elist_Id;
|
480 |
|
|
Parent_Iface_Tag_Elmt : Elmt_Id;
|
481 |
|
|
Typ_Ifaces_List : Elist_Id;
|
482 |
|
|
Typ_Ifaces_Comp_List : Elist_Id;
|
483 |
|
|
Typ_Ifaces_Tag_List : Elist_Id;
|
484 |
|
|
Typ_Iface_Tag_Elmt : Elmt_Id;
|
485 |
|
|
|
486 |
|
|
begin
|
487 |
|
|
Collect_Interfaces_Info
|
488 |
|
|
(T => Parent_Typ,
|
489 |
|
|
Ifaces_List => Parent_Ifaces_List,
|
490 |
|
|
Components_List => Parent_Ifaces_Comp_List,
|
491 |
|
|
Tags_List => Parent_Ifaces_Tag_List);
|
492 |
|
|
|
493 |
|
|
Collect_Interfaces_Info
|
494 |
|
|
(T => Typ,
|
495 |
|
|
Ifaces_List => Typ_Ifaces_List,
|
496 |
|
|
Components_List => Typ_Ifaces_Comp_List,
|
497 |
|
|
Tags_List => Typ_Ifaces_Tag_List);
|
498 |
|
|
|
499 |
|
|
Parent_Iface_Tag_Elmt := First_Elmt (Parent_Ifaces_Tag_List);
|
500 |
|
|
Typ_Iface_Tag_Elmt := First_Elmt (Typ_Ifaces_Tag_List);
|
501 |
|
|
while Present (Parent_Iface_Tag_Elmt) loop
|
502 |
|
|
Parent_Tag := Node (Parent_Iface_Tag_Elmt);
|
503 |
|
|
Typ_Tag := Node (Typ_Iface_Tag_Elmt);
|
504 |
|
|
|
505 |
|
|
pragma Assert
|
506 |
|
|
(Related_Type (Parent_Tag) = Related_Type (Typ_Tag));
|
507 |
|
|
Iface := Related_Type (Parent_Tag);
|
508 |
|
|
|
509 |
|
|
Iface_Nb_Prims :=
|
510 |
|
|
UI_To_Int (DT_Entry_Count (First_Tag_Component (Iface)));
|
511 |
|
|
|
512 |
|
|
if Iface_Nb_Prims > 0 then
|
513 |
|
|
|
514 |
|
|
-- Update slots of overridden primitives
|
515 |
|
|
|
516 |
|
|
declare
|
517 |
|
|
Last_Nod : constant Node_Id := Last (Result);
|
518 |
|
|
Nb_Prims : constant Nat := UI_To_Int
|
519 |
|
|
(DT_Entry_Count
|
520 |
|
|
(First_Tag_Component (Iface)));
|
521 |
|
|
Elmt : Elmt_Id;
|
522 |
|
|
Prim : Entity_Id;
|
523 |
|
|
E : Entity_Id;
|
524 |
|
|
Prim_Pos : Nat;
|
525 |
|
|
|
526 |
|
|
Prims_Table : array (1 .. Nb_Prims) of Boolean;
|
527 |
|
|
|
528 |
|
|
begin
|
529 |
|
|
Prims_Table := (others => False);
|
530 |
|
|
|
531 |
|
|
Elmt := First_Elmt (Primitive_Operations (Typ));
|
532 |
|
|
while Present (Elmt) loop
|
533 |
|
|
Prim := Node (Elmt);
|
534 |
|
|
E := Ultimate_Alias (Prim);
|
535 |
|
|
|
536 |
|
|
if not Is_Predefined_Dispatching_Operation (Prim)
|
537 |
|
|
and then Present (Interface_Alias (Prim))
|
538 |
|
|
and then Find_Dispatching_Type (Interface_Alias (Prim))
|
539 |
|
|
= Iface
|
540 |
|
|
and then not Is_Abstract_Subprogram (E)
|
541 |
|
|
and then not Is_Eliminated (E)
|
542 |
|
|
and then Find_Dispatching_Type (E) = Typ
|
543 |
|
|
then
|
544 |
|
|
Prim_Pos := UI_To_Int (DT_Position (Prim));
|
545 |
|
|
|
546 |
|
|
-- Remember that this slot is already initialized
|
547 |
|
|
|
548 |
|
|
pragma Assert (Prims_Table (Prim_Pos) = False);
|
549 |
|
|
Prims_Table (Prim_Pos) := True;
|
550 |
|
|
|
551 |
|
|
Append_To (Result,
|
552 |
|
|
Make_Assignment_Statement (Loc,
|
553 |
|
|
Name =>
|
554 |
|
|
Make_Indexed_Component (Loc,
|
555 |
|
|
Prefix =>
|
556 |
|
|
Make_Explicit_Dereference (Loc,
|
557 |
|
|
Unchecked_Convert_To
|
558 |
|
|
(Node
|
559 |
|
|
(Last_Elmt
|
560 |
|
|
(Access_Disp_Table (Iface))),
|
561 |
|
|
New_Reference_To (Typ_Tag, Loc))),
|
562 |
|
|
Expressions =>
|
563 |
|
|
New_List
|
564 |
|
|
(Make_Integer_Literal (Loc, Prim_Pos))),
|
565 |
|
|
|
566 |
|
|
Expression =>
|
567 |
|
|
Unchecked_Convert_To (RTE (RE_Prim_Ptr),
|
568 |
|
|
Make_Attribute_Reference (Loc,
|
569 |
|
|
Prefix => New_Reference_To (E, Loc),
|
570 |
|
|
Attribute_Name =>
|
571 |
|
|
Name_Unrestricted_Access))));
|
572 |
|
|
end if;
|
573 |
|
|
|
574 |
|
|
Next_Elmt (Elmt);
|
575 |
|
|
end loop;
|
576 |
|
|
|
577 |
|
|
-- Check if all primitives from the parent have been
|
578 |
|
|
-- overridden (to avoid copying the whole secondary
|
579 |
|
|
-- table from the parent).
|
580 |
|
|
|
581 |
|
|
-- IfaceG!(Typ_Sec_Tag).all := IfaceG!(Parent_Sec_Tag).all;
|
582 |
|
|
|
583 |
|
|
for J in Prims_Table'Range loop
|
584 |
|
|
if not Prims_Table (J) then
|
585 |
|
|
Insert_After (Last_Nod,
|
586 |
|
|
Make_Assignment_Statement (Loc,
|
587 |
|
|
Name =>
|
588 |
|
|
Make_Explicit_Dereference (Loc,
|
589 |
|
|
Unchecked_Convert_To
|
590 |
|
|
(Node (Last_Elmt (Access_Disp_Table (Iface))),
|
591 |
|
|
New_Reference_To (Typ_Tag, Loc))),
|
592 |
|
|
Expression =>
|
593 |
|
|
Make_Explicit_Dereference (Loc,
|
594 |
|
|
Unchecked_Convert_To
|
595 |
|
|
(Node (Last_Elmt (Access_Disp_Table (Iface))),
|
596 |
|
|
New_Reference_To (Parent_Tag, Loc)))));
|
597 |
|
|
exit;
|
598 |
|
|
end if;
|
599 |
|
|
end loop;
|
600 |
|
|
end;
|
601 |
|
|
end if;
|
602 |
|
|
|
603 |
|
|
Next_Elmt (Typ_Iface_Tag_Elmt);
|
604 |
|
|
Next_Elmt (Parent_Iface_Tag_Elmt);
|
605 |
|
|
end loop;
|
606 |
|
|
end;
|
607 |
|
|
|
608 |
|
|
return Result;
|
609 |
|
|
end Build_Inherit_CPP_Prims;
|
610 |
|
|
|
611 |
|
|
-------------------------
|
612 |
|
|
-- Build_Inherit_Prims --
|
613 |
|
|
-------------------------
|
614 |
|
|
|
615 |
|
|
function Build_Inherit_Prims
|
616 |
|
|
(Loc : Source_Ptr;
|
617 |
|
|
Typ : Entity_Id;
|
618 |
|
|
Old_Tag_Node : Node_Id;
|
619 |
|
|
New_Tag_Node : Node_Id;
|
620 |
|
|
Num_Prims : Nat) return Node_Id
|
621 |
|
|
is
|
622 |
|
|
begin
|
623 |
|
|
if RTE_Available (RE_DT) then
|
624 |
|
|
return
|
625 |
|
|
Make_Assignment_Statement (Loc,
|
626 |
|
|
Name =>
|
627 |
|
|
Make_Slice (Loc,
|
628 |
|
|
Prefix =>
|
629 |
|
|
Make_Selected_Component (Loc,
|
630 |
|
|
Prefix =>
|
631 |
|
|
Build_DT (Loc, New_Tag_Node),
|
632 |
|
|
Selector_Name =>
|
633 |
|
|
New_Reference_To
|
634 |
|
|
(RTE_Record_Component (RE_Prims_Ptr), Loc)),
|
635 |
|
|
Discrete_Range =>
|
636 |
|
|
Make_Range (Loc,
|
637 |
|
|
Low_Bound => Make_Integer_Literal (Loc, 1),
|
638 |
|
|
High_Bound => Make_Integer_Literal (Loc, Num_Prims))),
|
639 |
|
|
|
640 |
|
|
Expression =>
|
641 |
|
|
Make_Slice (Loc,
|
642 |
|
|
Prefix =>
|
643 |
|
|
Make_Selected_Component (Loc,
|
644 |
|
|
Prefix =>
|
645 |
|
|
Build_DT (Loc, Old_Tag_Node),
|
646 |
|
|
Selector_Name =>
|
647 |
|
|
New_Reference_To
|
648 |
|
|
(RTE_Record_Component (RE_Prims_Ptr), Loc)),
|
649 |
|
|
Discrete_Range =>
|
650 |
|
|
Make_Range (Loc,
|
651 |
|
|
Low_Bound => Make_Integer_Literal (Loc, 1),
|
652 |
|
|
High_Bound => Make_Integer_Literal (Loc, Num_Prims))));
|
653 |
|
|
else
|
654 |
|
|
return
|
655 |
|
|
Make_Assignment_Statement (Loc,
|
656 |
|
|
Name =>
|
657 |
|
|
Make_Slice (Loc,
|
658 |
|
|
Prefix =>
|
659 |
|
|
Unchecked_Convert_To
|
660 |
|
|
(Node (Last_Elmt (Access_Disp_Table (Typ))),
|
661 |
|
|
New_Tag_Node),
|
662 |
|
|
Discrete_Range =>
|
663 |
|
|
Make_Range (Loc,
|
664 |
|
|
Low_Bound => Make_Integer_Literal (Loc, 1),
|
665 |
|
|
High_Bound => Make_Integer_Literal (Loc, Num_Prims))),
|
666 |
|
|
|
667 |
|
|
Expression =>
|
668 |
|
|
Make_Slice (Loc,
|
669 |
|
|
Prefix =>
|
670 |
|
|
Unchecked_Convert_To
|
671 |
|
|
(Node (Last_Elmt (Access_Disp_Table (Typ))),
|
672 |
|
|
Old_Tag_Node),
|
673 |
|
|
Discrete_Range =>
|
674 |
|
|
Make_Range (Loc,
|
675 |
|
|
Low_Bound => Make_Integer_Literal (Loc, 1),
|
676 |
|
|
High_Bound => Make_Integer_Literal (Loc, Num_Prims))));
|
677 |
|
|
end if;
|
678 |
|
|
end Build_Inherit_Prims;
|
679 |
|
|
|
680 |
|
|
-------------------------------
|
681 |
|
|
-- Build_Get_Prim_Op_Address --
|
682 |
|
|
-------------------------------
|
683 |
|
|
|
684 |
|
|
procedure Build_Get_Prim_Op_Address
|
685 |
|
|
(Loc : Source_Ptr;
|
686 |
|
|
Typ : Entity_Id;
|
687 |
|
|
Position : Uint;
|
688 |
|
|
Tag_Node : in out Node_Id;
|
689 |
|
|
New_Node : out Node_Id)
|
690 |
|
|
is
|
691 |
|
|
New_Prefix : Node_Id;
|
692 |
|
|
|
693 |
|
|
begin
|
694 |
|
|
pragma Assert
|
695 |
|
|
(Position <= DT_Entry_Count (First_Tag_Component (Typ)));
|
696 |
|
|
|
697 |
|
|
-- At the end of the Access_Disp_Table list we have the type
|
698 |
|
|
-- declaration required to convert the tag into a pointer to
|
699 |
|
|
-- the prims_ptr table (see Freeze_Record_Type).
|
700 |
|
|
|
701 |
|
|
New_Prefix :=
|
702 |
|
|
Unchecked_Convert_To
|
703 |
|
|
(Node (Last_Elmt (Access_Disp_Table (Typ))), Tag_Node);
|
704 |
|
|
|
705 |
|
|
-- Unchecked_Convert_To relocates the controlling tag node and therefore
|
706 |
|
|
-- we must update it.
|
707 |
|
|
|
708 |
|
|
Tag_Node := Expression (New_Prefix);
|
709 |
|
|
|
710 |
|
|
New_Node :=
|
711 |
|
|
Make_Indexed_Component (Loc,
|
712 |
|
|
Prefix => New_Prefix,
|
713 |
|
|
Expressions => New_List (Make_Integer_Literal (Loc, Position)));
|
714 |
|
|
end Build_Get_Prim_Op_Address;
|
715 |
|
|
|
716 |
|
|
-----------------------------
|
717 |
|
|
-- Build_Get_Transportable --
|
718 |
|
|
-----------------------------
|
719 |
|
|
|
720 |
|
|
function Build_Get_Transportable
|
721 |
|
|
(Loc : Source_Ptr;
|
722 |
|
|
Tag_Node : Node_Id) return Node_Id
|
723 |
|
|
is
|
724 |
|
|
begin
|
725 |
|
|
return
|
726 |
|
|
Make_Selected_Component (Loc,
|
727 |
|
|
Prefix =>
|
728 |
|
|
Build_TSD (Loc,
|
729 |
|
|
Unchecked_Convert_To (RTE (RE_Address), Tag_Node)),
|
730 |
|
|
Selector_Name =>
|
731 |
|
|
New_Reference_To
|
732 |
|
|
(RTE_Record_Component (RE_Transportable), Loc));
|
733 |
|
|
end Build_Get_Transportable;
|
734 |
|
|
|
735 |
|
|
------------------------------------
|
736 |
|
|
-- Build_Inherit_Predefined_Prims --
|
737 |
|
|
------------------------------------
|
738 |
|
|
|
739 |
|
|
function Build_Inherit_Predefined_Prims
|
740 |
|
|
(Loc : Source_Ptr;
|
741 |
|
|
Old_Tag_Node : Node_Id;
|
742 |
|
|
New_Tag_Node : Node_Id) return Node_Id
|
743 |
|
|
is
|
744 |
|
|
begin
|
745 |
|
|
return
|
746 |
|
|
Make_Assignment_Statement (Loc,
|
747 |
|
|
Name =>
|
748 |
|
|
Make_Slice (Loc,
|
749 |
|
|
Prefix =>
|
750 |
|
|
Make_Explicit_Dereference (Loc,
|
751 |
|
|
Unchecked_Convert_To (RTE (RE_Predef_Prims_Table_Ptr),
|
752 |
|
|
Make_Explicit_Dereference (Loc,
|
753 |
|
|
Unchecked_Convert_To (RTE (RE_Addr_Ptr),
|
754 |
|
|
New_Tag_Node)))),
|
755 |
|
|
Discrete_Range => Make_Range (Loc,
|
756 |
|
|
Make_Integer_Literal (Loc, Uint_1),
|
757 |
|
|
New_Reference_To (RTE (RE_Max_Predef_Prims), Loc))),
|
758 |
|
|
|
759 |
|
|
Expression =>
|
760 |
|
|
Make_Slice (Loc,
|
761 |
|
|
Prefix =>
|
762 |
|
|
Make_Explicit_Dereference (Loc,
|
763 |
|
|
Unchecked_Convert_To (RTE (RE_Predef_Prims_Table_Ptr),
|
764 |
|
|
Make_Explicit_Dereference (Loc,
|
765 |
|
|
Unchecked_Convert_To (RTE (RE_Addr_Ptr),
|
766 |
|
|
Old_Tag_Node)))),
|
767 |
|
|
Discrete_Range =>
|
768 |
|
|
Make_Range (Loc,
|
769 |
|
|
Make_Integer_Literal (Loc, 1),
|
770 |
|
|
New_Reference_To (RTE (RE_Max_Predef_Prims), Loc))));
|
771 |
|
|
end Build_Inherit_Predefined_Prims;
|
772 |
|
|
|
773 |
|
|
-------------------------
|
774 |
|
|
-- Build_Offset_To_Top --
|
775 |
|
|
-------------------------
|
776 |
|
|
|
777 |
|
|
function Build_Offset_To_Top
|
778 |
|
|
(Loc : Source_Ptr;
|
779 |
|
|
This_Node : Node_Id) return Node_Id
|
780 |
|
|
is
|
781 |
|
|
Tag_Node : Node_Id;
|
782 |
|
|
|
783 |
|
|
begin
|
784 |
|
|
Tag_Node :=
|
785 |
|
|
Make_Explicit_Dereference (Loc,
|
786 |
|
|
Unchecked_Convert_To (RTE (RE_Tag_Ptr), This_Node));
|
787 |
|
|
|
788 |
|
|
return
|
789 |
|
|
Make_Explicit_Dereference (Loc,
|
790 |
|
|
Unchecked_Convert_To (RTE (RE_Offset_To_Top_Ptr),
|
791 |
|
|
Make_Function_Call (Loc,
|
792 |
|
|
Name =>
|
793 |
|
|
Make_Expanded_Name (Loc,
|
794 |
|
|
Chars => Name_Op_Subtract,
|
795 |
|
|
Prefix =>
|
796 |
|
|
New_Reference_To
|
797 |
|
|
(RTU_Entity (System_Storage_Elements), Loc),
|
798 |
|
|
Selector_Name => Make_Identifier (Loc, Name_Op_Subtract)),
|
799 |
|
|
Parameter_Associations => New_List (
|
800 |
|
|
Unchecked_Convert_To (RTE (RE_Address), Tag_Node),
|
801 |
|
|
New_Reference_To
|
802 |
|
|
(RTE (RE_DT_Offset_To_Top_Offset), Loc)))));
|
803 |
|
|
end Build_Offset_To_Top;
|
804 |
|
|
|
805 |
|
|
------------------------------------------
|
806 |
|
|
-- Build_Set_Predefined_Prim_Op_Address --
|
807 |
|
|
------------------------------------------
|
808 |
|
|
|
809 |
|
|
function Build_Set_Predefined_Prim_Op_Address
|
810 |
|
|
(Loc : Source_Ptr;
|
811 |
|
|
Tag_Node : Node_Id;
|
812 |
|
|
Position : Uint;
|
813 |
|
|
Address_Node : Node_Id) return Node_Id
|
814 |
|
|
is
|
815 |
|
|
begin
|
816 |
|
|
return
|
817 |
|
|
Make_Assignment_Statement (Loc,
|
818 |
|
|
Name =>
|
819 |
|
|
Make_Indexed_Component (Loc,
|
820 |
|
|
Prefix =>
|
821 |
|
|
Unchecked_Convert_To (RTE (RE_Predef_Prims_Table_Ptr),
|
822 |
|
|
Make_Explicit_Dereference (Loc,
|
823 |
|
|
Unchecked_Convert_To (RTE (RE_Addr_Ptr), Tag_Node))),
|
824 |
|
|
Expressions =>
|
825 |
|
|
New_List (Make_Integer_Literal (Loc, Position))),
|
826 |
|
|
|
827 |
|
|
Expression => Address_Node);
|
828 |
|
|
end Build_Set_Predefined_Prim_Op_Address;
|
829 |
|
|
|
830 |
|
|
-------------------------------
|
831 |
|
|
-- Build_Set_Prim_Op_Address --
|
832 |
|
|
-------------------------------
|
833 |
|
|
|
834 |
|
|
function Build_Set_Prim_Op_Address
|
835 |
|
|
(Loc : Source_Ptr;
|
836 |
|
|
Typ : Entity_Id;
|
837 |
|
|
Tag_Node : Node_Id;
|
838 |
|
|
Position : Uint;
|
839 |
|
|
Address_Node : Node_Id) return Node_Id
|
840 |
|
|
is
|
841 |
|
|
Ctrl_Tag : Node_Id := Tag_Node;
|
842 |
|
|
New_Node : Node_Id;
|
843 |
|
|
|
844 |
|
|
begin
|
845 |
|
|
Build_Get_Prim_Op_Address (Loc, Typ, Position, Ctrl_Tag, New_Node);
|
846 |
|
|
|
847 |
|
|
return
|
848 |
|
|
Make_Assignment_Statement (Loc,
|
849 |
|
|
Name => New_Node,
|
850 |
|
|
Expression => Address_Node);
|
851 |
|
|
end Build_Set_Prim_Op_Address;
|
852 |
|
|
|
853 |
|
|
-----------------------------
|
854 |
|
|
-- Build_Set_Size_Function --
|
855 |
|
|
-----------------------------
|
856 |
|
|
|
857 |
|
|
function Build_Set_Size_Function
|
858 |
|
|
(Loc : Source_Ptr;
|
859 |
|
|
Tag_Node : Node_Id;
|
860 |
|
|
Size_Func : Entity_Id) return Node_Id is
|
861 |
|
|
begin
|
862 |
|
|
pragma Assert (Chars (Size_Func) = Name_uSize
|
863 |
|
|
and then RTE_Record_Component_Available (RE_Size_Func));
|
864 |
|
|
return
|
865 |
|
|
Make_Assignment_Statement (Loc,
|
866 |
|
|
Name =>
|
867 |
|
|
Make_Selected_Component (Loc,
|
868 |
|
|
Prefix =>
|
869 |
|
|
Build_TSD (Loc,
|
870 |
|
|
Unchecked_Convert_To (RTE (RE_Address), Tag_Node)),
|
871 |
|
|
Selector_Name =>
|
872 |
|
|
New_Reference_To
|
873 |
|
|
(RTE_Record_Component (RE_Size_Func), Loc)),
|
874 |
|
|
Expression =>
|
875 |
|
|
Unchecked_Convert_To (RTE (RE_Size_Ptr),
|
876 |
|
|
Make_Attribute_Reference (Loc,
|
877 |
|
|
Prefix => New_Reference_To (Size_Func, Loc),
|
878 |
|
|
Attribute_Name => Name_Unrestricted_Access)));
|
879 |
|
|
end Build_Set_Size_Function;
|
880 |
|
|
|
881 |
|
|
------------------------------------
|
882 |
|
|
-- Build_Set_Static_Offset_To_Top --
|
883 |
|
|
------------------------------------
|
884 |
|
|
|
885 |
|
|
function Build_Set_Static_Offset_To_Top
|
886 |
|
|
(Loc : Source_Ptr;
|
887 |
|
|
Iface_Tag : Node_Id;
|
888 |
|
|
Offset_Value : Node_Id) return Node_Id is
|
889 |
|
|
begin
|
890 |
|
|
return
|
891 |
|
|
Make_Assignment_Statement (Loc,
|
892 |
|
|
Make_Explicit_Dereference (Loc,
|
893 |
|
|
Unchecked_Convert_To (RTE (RE_Offset_To_Top_Ptr),
|
894 |
|
|
Make_Function_Call (Loc,
|
895 |
|
|
Name =>
|
896 |
|
|
Make_Expanded_Name (Loc,
|
897 |
|
|
Chars => Name_Op_Subtract,
|
898 |
|
|
Prefix =>
|
899 |
|
|
New_Reference_To
|
900 |
|
|
(RTU_Entity (System_Storage_Elements), Loc),
|
901 |
|
|
Selector_Name => Make_Identifier (Loc, Name_Op_Subtract)),
|
902 |
|
|
Parameter_Associations => New_List (
|
903 |
|
|
Unchecked_Convert_To (RTE (RE_Address), Iface_Tag),
|
904 |
|
|
New_Reference_To
|
905 |
|
|
(RTE (RE_DT_Offset_To_Top_Offset), Loc))))),
|
906 |
|
|
Offset_Value);
|
907 |
|
|
end Build_Set_Static_Offset_To_Top;
|
908 |
|
|
|
909 |
|
|
---------------
|
910 |
|
|
-- Build_TSD --
|
911 |
|
|
---------------
|
912 |
|
|
|
913 |
|
|
function Build_TSD
|
914 |
|
|
(Loc : Source_Ptr;
|
915 |
|
|
Tag_Node_Addr : Node_Id) return Node_Id is
|
916 |
|
|
begin
|
917 |
|
|
return
|
918 |
|
|
Unchecked_Convert_To (RTE (RE_Type_Specific_Data_Ptr),
|
919 |
|
|
Make_Explicit_Dereference (Loc,
|
920 |
|
|
Prefix => Unchecked_Convert_To (RTE (RE_Addr_Ptr),
|
921 |
|
|
Make_Function_Call (Loc,
|
922 |
|
|
Name =>
|
923 |
|
|
Make_Expanded_Name (Loc,
|
924 |
|
|
Chars => Name_Op_Subtract,
|
925 |
|
|
Prefix =>
|
926 |
|
|
New_Reference_To
|
927 |
|
|
(RTU_Entity (System_Storage_Elements), Loc),
|
928 |
|
|
Selector_Name => Make_Identifier (Loc, Name_Op_Subtract)),
|
929 |
|
|
|
930 |
|
|
Parameter_Associations => New_List (
|
931 |
|
|
Tag_Node_Addr,
|
932 |
|
|
New_Reference_To
|
933 |
|
|
(RTE (RE_DT_Typeinfo_Ptr_Size), Loc))))));
|
934 |
|
|
end Build_TSD;
|
935 |
|
|
|
936 |
|
|
end Exp_Atag;
|