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-- Iir to ortho translator.
-- Copyright (C) 2002 - 2014 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.
package Trans.Chap4 is
-- Translate of a type declaration corresponds to the translation of
-- its definition.
procedure Translate_Type_Declaration (Decl : Iir);
procedure Translate_Anonymous_Type_Declaration (Decl : Iir);
procedure Translate_Subtype_Declaration (Decl : Iir_Subtype_Declaration);
procedure Translate_Bool_Type_Declaration (Decl : Iir_Type_Declaration);
-- Translation of declarations occurs in three phases:
-- 1) instance is built by putting objects in a record.
-- 2) subprograms are declared (using instance as the first parameter).
-- 3) subprogram bodies are translated.
--
-- In some cases (non nested packages), no instance is needed, thus the
-- first phase directly creates objects.
-- Phase 1 and phase 2 could theorically be merged, but the instance
-- pointer is generally created at the end of the phase 1.
--
-- Phase 2 and phase 3 were merged, but there is at least one case where it
-- is not possible: instantiation of a package INST in package
-- declaration PKG. Subprograms declared in INST must have access to the
-- INST body but also (indirectly) to the PKG body if they call a
-- subprogram declared in PKG (and passed as a subprogram interface). So
-- INST instance is the instance for PKG body. Therefore they must be
-- translated during PKG body translation (that's because INST body appears
-- at the instantiation point instead of the end of PKG body as described
-- in the LRM).
-- Translate declaration DECL, which must not be a subprogram
-- specification.
procedure Translate_Declaration (Decl : Iir);
-- Translate declarations, except subprograms spec and bodies.
procedure Translate_Declaration_Chain (Parent : Iir);
-- Create declarations for statements STMTS to support resume.
procedure Translate_Statements_Chain_State_Declaration
(Stmts : Iir; State_Scope : Var_Scope_Acc);
-- Translate subprograms in declaration chain of PARENT.
procedure Translate_Declaration_Chain_Subprograms
(Parent : Iir; What : Subprg_Translate_Kind);
-- Create subprograms for type/function conversion of signal
-- associations.
-- ENTITY is the entity instantiated, which can be either
-- an entity_declaration (for component configuration or direct
-- component instantiation), a component declaration (for a component
-- instantiation) or Null_Iir (for a block header).
-- BLOCK is the block/architecture containing the instantiation stmt.
-- STMT is either the instantiation stmt or the block header.
procedure Translate_Association_Subprograms
(Stmt : Iir; Block : Iir; Base_Block : Iir; Entity : Iir);
-- Elaborate In/Out_Conversion for ASSOC (signals only).
-- NDEST is the data structure to be registered.
procedure Elab_In_Conversion
(Assoc : Iir; Formal : Iir; Ndest : out Mnode);
procedure Elab_Out_Conversion
(Assoc : Iir; Formal : Iir; Ndest : out Mnode);
-- Create code to elaborate declarations.
-- NEED_FINAL is set when at least one declaration needs to be
-- finalized (eg: file declaration, protected objects).
procedure Elab_Declaration_Chain
(Parent : Iir; Need_Final : out Boolean);
-- Finalize declarations.
procedure Final_Declaration_Chain (Parent : Iir; Deallocate : Boolean);
-- Translate port or generic declarations of PARENT.
procedure Translate_Port_Chain (Parent : Iir);
procedure Translate_Generic_Chain (Parent : Iir);
-- Elaborate signal subtypes and allocate the storage for the object.
-- If HAS_COPY is true, do not allocate storage for values, as the values
-- will be directly referenced from the association.
procedure Elab_Signal_Declaration_Storage
(Decl : Iir; Has_Copy : Boolean);
-- Create signal object.
-- Note: SIG can be a signal sub-element (used when signals are
-- collapsed).
-- If CHECK_NULL is TRUE, create the signal only if it was not yet
-- created.
-- PARENT is used to link the signal to its parent by rti.
procedure Elab_Signal_Declaration_Object
(Sig : Iir; Parent : Iir; Check_Null : Boolean);
-- True of SIG has a direct driver.
function Has_Direct_Driver (Sig : Iir) return Boolean;
-- Allocate memory for direct driver if necessary.
procedure Elab_Direct_Driver_Declaration_Storage (Decl : Iir);
-- Generate code to create object OBJ and initialize it with value VAL.
procedure Elab_Object_Value (Obj : Iir; Value : Iir);
-- Allocate the storage for OBJ, if necessary.
procedure Elab_Object_Storage (Obj : Iir);
-- For a scalar or access type ATYPE, return the default initial value.
function Get_Scalar_Initial_Value (Atype : Iir) return O_Enode;
-- Initialize NAME/OBJ with VALUE.
procedure Elab_Object_Init
(Name : Mnode; Obj : Iir; Value : Iir; Alloc_Kind : Allocation_Kind);
-- Get the ortho type for an object of type TINFO.
function Get_Object_Type (Tinfo : Type_Info_Acc; Kind : Object_Kind_Type)
return O_Tnode;
-- Allocate (and build) a complex object of type OBJ_TYPE.
-- VAR is the object to be allocated.
procedure Allocate_Complex_Object (Obj_Type : Iir;
Alloc_Kind : Allocation_Kind;
Var : in out Mnode);
--function Translate_Interface_Declaration
-- (Decl : Iir; Subprg : Iir) return Tree;
-- Create a record that describe thes location of an IIR node and
-- returns the address of it.
function Get_Location (N : Iir) return O_Dnode;
-- Set default value to OBJ.
procedure Init_Object (Obj : Mnode; Obj_Type : Iir);
end Trans.Chap4;
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