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-- Mcode back-end for ortho - Declarations handling.
-- Copyright (C) 2006 Tristan Gingold
--
-- GHDL is free software; you can redistribute it and/or modify it under
-- the terms of the GNU General Public License as published by the Free
-- Software Foundation; either version 2, or (at your option) any later
-- version.
--
-- GHDL is distributed in the hope that it will be useful, but WITHOUT ANY
-- WARRANTY; without even the implied warranty of MERCHANTABILITY or
-- FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
-- for more details.
--
-- You should have received a copy of the GNU General Public License
-- along with GCC; see the file COPYING. If not, write to the Free
-- Software Foundation, 59 Temple Place - Suite 330, Boston, MA
-- 02111-1307, USA.
with Ortho_Code.Abi;
package Ortho_Code.Decls is
-- Kind of a declaration.
type OD_Kind is (OD_Type,
OD_Const,
-- Value of constant, initial value of variable.
OD_Init_Val,
-- Global and local variables.
OD_Var, OD_Local,
-- Subprograms.
OD_Function, OD_Procedure,
-- Additional node for a subprogram. Internal use only.
OD_Subprg_Ext,
OD_Interface,
OD_Body,
OD_Block);
-- Return the kind of declaration DECL.
function Get_Decl_Kind (Decl : O_Dnode) return OD_Kind;
-- Return the type of a declaration.
function Get_Decl_Type (Decl : O_Dnode) return O_Tnode;
-- Return the identifier of a declaration.
function Get_Decl_Ident (Decl : O_Dnode) return O_Ident;
-- Return the storage of a declaration.
function Get_Decl_Storage (Decl : O_Dnode) return O_Storage;
-- Return the depth of a declaration.
function Get_Decl_Depth (Decl : O_Dnode) return O_Depth;
-- Register for the declaration.
function Get_Decl_Reg (Decl : O_Dnode) return O_Reg;
procedure Set_Decl_Reg (Decl : O_Dnode; Reg : O_Reg);
-- Return the next decl (in the same scope) after DECL.
-- This skips declarations in an inner block, but returns interfaces for
-- a subprogram.
function Get_Decl_Chain (Decl : O_Dnode) return O_Dnode;
-- Get the last declaration.
function Get_Decl_Last return O_Dnode;
-- Return the subprogram declaration correspondig to body BOD.
function Get_Body_Decl (Bod : O_Dnode) return O_Dnode;
-- Return the parent of a body.
function Get_Body_Parent (Bod : O_Dnode) return O_Dnode;
-- Get the entry statement of body DECL.
function Get_Body_Stmt (Bod : O_Dnode) return O_Enode;
-- Get/Set the info field of a body.
function Get_Body_Info (Bod : O_Dnode) return Int32;
procedure Set_Body_Info (Bod : O_Dnode; Info : Int32);
-- Get the last declaration of block BLK.
function Get_Block_Last (Blk : O_Dnode) return O_Dnode;
-- Get/Set the block max stack offset.
function Get_Block_Max_Stack (Blk : O_Dnode) return Uns32;
procedure Set_Block_Max_Stack (Blk : O_Dnode; Max : Uns32);
-- Info on blocks.
function Get_Block_Info1 (Blk : O_Dnode) return Int32;
procedure Set_Block_Info1 (Blk : O_Dnode; Info : Int32);
function Get_Block_Info2 (Blk : O_Dnode) return Int32;
procedure Set_Block_Info2 (Blk : O_Dnode; Info : Int32);
-- Get the declaration and the value associated with a constant value.
function Get_Val_Decl (Decl : O_Dnode) return O_Dnode;
function Get_Val_Val (Decl : O_Dnode) return O_Cnode;
-- Declare a type.
-- This simply gives a name to a type.
procedure New_Type_Decl (Ident : O_Ident; Atype : O_Tnode);
-- If Flag_Type_Name is set, a map from type to name is maintained.
function Get_Type_Decl (Atype : O_Tnode) return O_Dnode;
-- Set/Get the offset (or register) of interface or local DECL.
-- To be used by ABI.
procedure Set_Local_Offset (Decl : O_Dnode; Off : Int32);
function Get_Local_Offset (Decl : O_Dnode) return Int32;
-- Get/Set user info on subprogram, variable, constant declaration.
procedure Set_Decl_Info (Decl : O_Dnode; Ref : Int32);
function Get_Decl_Info (Decl : O_Dnode) return Int32;
-- Get/Set the stack size of subprogram arguments.
procedure Set_Subprg_Stack (Decl : O_Dnode; Val : Int32);
function Get_Subprg_Stack (Decl : O_Dnode) return Int32;
-- Get the first interface of a subprogram declaration.
function Get_Subprg_Interfaces (Decl : O_Dnode) return O_Dnode;
-- Get the next interface.
-- End of interface chain when result is O_Dnode_Null.
function Get_Interface_Chain (Decl : O_Dnode) return O_Dnode;
-- Declare a constant.
-- This simply gives a name to a constant value or aggregate.
-- A constant cannot be modified and its storage cannot be local.
-- ATYPE must be constrained.
procedure New_Const_Decl
(Res : out O_Dnode;
Ident : O_Ident;
Storage : O_Storage;
Atype : O_Tnode);
-- Set the value to CST.
procedure New_Const_Value (Cst : O_Dnode; Val : O_Cnode);
-- Create a variable declaration.
-- A variable can be local only inside a function.
-- ATYPE must be constrained.
procedure New_Var_Decl
(Res : out O_Dnode;
Ident : O_Ident;
Storage : O_Storage;
Atype : O_Tnode);
type O_Inter_List is limited private;
-- Start a subprogram declaration.
-- Note: nested subprograms are allowed, ie o_storage_local subprograms can
-- be declared inside a subprograms. It is not allowed to declare
-- o_storage_external subprograms inside a subprograms.
-- Return type and interfaces cannot be a composite type.
procedure Start_Function_Decl
(Interfaces : out O_Inter_List;
Ident : O_Ident;
Storage : O_Storage;
Rtype : O_Tnode);
-- For a subprogram without return value.
procedure Start_Procedure_Decl
(Interfaces : out O_Inter_List;
Ident : O_Ident;
Storage : O_Storage);
-- Add an interface declaration to INTERFACES.
procedure New_Interface_Decl
(Interfaces : in out O_Inter_List;
Res : out O_Dnode;
Ident : O_Ident;
Atype : O_Tnode);
-- Finish the function declaration, get the node and a statement list.
procedure Finish_Subprogram_Decl
(Interfaces : in out O_Inter_List; Res : out O_Dnode);
-- Start subprogram body of DECL. STMT is the corresponding statement.
-- Return the declaration for the body.
function Start_Subprogram_Body (Decl : O_Dnode; Stmt : O_Enode)
return O_Dnode;
procedure Finish_Subprogram_Body;
-- Start a declarative region.
function Start_Declare_Stmt return O_Dnode;
procedure Finish_Declare_Stmt (Parent : O_Dnode);
procedure Disp_All_Decls;
procedure Disp_Block (Indent : Natural; Start : O_Dnode);
procedure Disp_Decl_Name (Decl : O_Dnode);
procedure Disp_Decl (Indent : Natural; Decl : O_Dnode);
procedure Disp_Stats;
type Mark_Type is limited private;
procedure Mark (M : out Mark_Type);
procedure Release (M : Mark_Type);
-- Allocate non explicitly initialized variables.
procedure Alloc_Zero;
procedure Finish;
private
type O_Inter_List is record
-- The declaration of the subprogram.
Decl : O_Dnode;
-- Last declared parameter.
Last_Param : O_Dnode;
-- Data for ABI.
Abi : Ortho_Code.Abi.O_Abi_Subprg;
end record;
type Mark_Type is record
Dnode : O_Dnode;
TDnode : O_Tnode;
end record;
end Ortho_Code.Decls;
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