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-- Cross references.
-- Copyright (C) 2002, 2003, 2004, 2005 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 GHDL; see the file COPYING. If not, write to the Free
-- Software Foundation, 59 Temple Place - Suite 330, Boston, MA
-- 02111-1307, USA.
with Tables;
with GNAT.Heap_Sort_A;
with Flags;
with Std_Package;
with Errorout; use Errorout;
with Nodes;
package body Xrefs is
type Xref_Type is record
-- Where the cross-reference (or the name) appears.
Loc : Location_Type;
-- What the name refer to.
Ref : Iir;
-- Kind of reference (See package specification).
Kind : Xref_Kind;
end record;
package Xref_Table is new Tables
(Table_Index_Type => Natural,
Table_Component_Type => Xref_Type,
Table_Low_Bound => 0,
Table_Initial => 128);
function Get_Xref_Location (N : Xref) return Location_Type is
begin
return Xref_Table.Table (N).Loc;
end Get_Xref_Location;
function Get_Xref_Kind (N : Xref) return Xref_Kind is
begin
return Xref_Table.Table (N).Kind;
end Get_Xref_Kind;
function Get_Xref_Node (N : Xref) return Iir is
begin
return Xref_Table.Table (N).Ref;
end Get_Xref_Node;
function Get_Last_Xref return Xref is
begin
return Xref_Table.Last;
end Get_Last_Xref;
procedure Init is
begin
Xref_Table.Set_Last (Bad_Xref);
end Init;
procedure Add_Xref (Loc : Location_Type; Ref : Iir; Kind : Xref_Kind) is
begin
-- Check there is no xref for the same location to the same reference.
-- (Note that a designatore may reference several declarations, this
-- is possible in attribute specification for an overloadable name).
-- This is a simple heuristic as this catch only two referenced in the
-- row but efficient and should be enough to catch errors.
pragma Assert
(Xref_Table.Last < Xref_Table.First
or else Xref_Table.Table (Xref_Table.Last).Loc /= Loc
or else Xref_Table.Table (Xref_Table.Last).Ref /= Ref);
Xref_Table.Append (Xref_Type'(Loc => Loc,
Ref => Ref,
Kind => Kind));
end Add_Xref;
procedure Xref_Decl (Decl : Iir) is
begin
if Flags.Flag_Xref then
Add_Xref (Get_Location (Decl), Decl, Xref_Decl);
end if;
end Xref_Decl;
procedure Xref_Ref (Name : Iir; Decl : Iir) is
begin
if Flags.Flag_Xref then
Add_Xref (Get_Location (Name), Decl, Xref_Ref);
end if;
end Xref_Ref;
procedure Xref_Body (Bod : Iir; Spec : Iir) is
begin
if Flags.Flag_Xref then
Add_Xref (Get_Location (Bod), Spec, Xref_Body);
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