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|
-- VHDL libraries handling.
-- Copyright (C) 2018 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 Flags;
with Name_Table;
with Files_Map;
with Vhdl.Utils; use Vhdl.Utils;
with Errorout; use Errorout;
with Vhdl.Errors; use Vhdl.Errors;
with Libraries; use Libraries;
with Vhdl.Scanner;
with Vhdl.Parse;
with Vhdl.Disp_Tree;
with Vhdl.Prints;
with Vhdl.Sem;
with Vhdl.Post_Sems;
with Vhdl.Canon;
with Vhdl.Nodes_GC;
package body Vhdl.Sem_Lib is
procedure Error_Lib_Msg (Msg : String; Arg1 : Earg_Type) is
begin
Report_Msg (Msgid_Error, Library, No_Source_Coord, Msg, (1 => Arg1));
end Error_Lib_Msg;
function Load_File (File : Source_File_Entry) return Iir_Design_File
is
Res : Iir_Design_File;
begin
Vhdl.Scanner.Set_File (File);
if Vhdl.Scanner.Detect_Encoding_Errors then
-- Don't even try to parse such a file. The BOM will be interpreted
-- as an identifier, which is not valid at the beginning of a file.
Res := Null_Iir;
else
Res := Vhdl.Parse.Parse_Design_File;
end if;
Vhdl.Scanner.Close_File;
if Res /= Null_Iir then
Set_Parent (Res, Work_Library);
Set_Design_File_Filename (Res, Files_Map.Get_File_Name (File));
Set_Design_File_Source (Res, File);
end if;
return Res;
end Load_File;
-- parse a file.
-- Return a design_file without putting it into the library
-- (because it was not analyzed).
function Load_File_Name (File_Name: Name_Id) return Iir_Design_File
is
Fe : Source_File_Entry;
begin
Fe := Files_Map.Read_Source_File (Local_Directory, File_Name);
if Fe = No_Source_File_Entry then
Error_Msg_Option ("cannot open " & Name_Table.Image (File_Name));
return Null_Iir;
end if;
return Load_File (Fe);
end Load_File_Name;
procedure Finish_Compilation
(Unit : Iir_Design_Unit; Main : Boolean := False)
is
Lib_Unit : Iir;
begin
Lib_Unit := Get_Library_Unit (Unit);
if (Main or Flags.Dump_All) and then Flags.Dump_Parse then
Vhdl.Disp_Tree.Disp_Tree (Unit);
end if;
if Flags.Check_Ast_Level > 0 then
Vhdl.Nodes_GC.Check_Tree (Unit);
end if;
if Flags.Verbose then
Report_Msg (Msgid_Note, Semantic, +Lib_Unit,
"analyze %n", (1 => +Lib_Unit));
end if;
Sem.Semantic (Unit);
if (Main or Flags.Dump_All) and then Flags.Dump_Sem then
Vhdl.Disp_Tree.Disp_Tree (Unit);
end if;
if Errorout.Nbr_Errors > 0 then
return;
end if;
if (Main or Flags.List_All) and then Flags.List_Sem then
Vhdl.Prints.Disp_Vhdl (Unit);
end if;
if Flags.Check_Ast_Level > 0 then
Vhdl.Nodes_GC.Check_Tree (Unit);
end if;
-- Post checks
----------------
Vhdl.Post_Sems.Post_Sem_Checks (Unit);
if Errorout.Nbr_Errors > 0 then
return;
end if;
-- Canonalisation.
------------------
if Flags.Verbose then
Report_Msg (Msgid_Note, Semantic, +Lib_Unit,
"canonicalize %n", (1 => +Lib_Unit));
end if;
Vhdl.Canon.Canonicalize (Unit);
if (Main or Flags.Dump_All) and then Flags.Dump_Canon then
Vhdl.Disp_Tree.Disp_Tree (Unit);
end if;
if Errorout.Nbr_Errors > 0 then
return;
end if;
if (Main or Flags.List_All) and then Flags.List_Canon then
Vhdl.Prints.Disp_Vhdl (Unit);
end if;
if Flags.Check_Ast_Level > 0 then
Vhdl.Nodes_GC.Check_Tree (Unit);
end if;
end Finish_Compilation;
procedure Free_Dependence_List (Design : Iir_Design_Unit)
is
List : Iir_List;
It : List_Iterator;
El : Iir;
begin
List := Get_Dependence_List (Design);
if List = Null_Iir_List then
return;
end if;
It := List_Iterate (List);
while Is_Valid (It) loop
El := Get_Element (It);
case Get_Kind (El) is
when Iir_Kind_Design_Unit =>
null;
when Iir_Kind_Entity_Aspect_Entity =>
Free_Recursive (El);
when others =>
Error_Kind ("free_dependence_list", El);
end case;
Next (It);
end loop;
Destroy_Iir_List (List);
Set_Dependence_List (Design, Null_Iir_List);
end Free_Dependence_List;
procedure Load_Parse_Design_Unit
(Design_Unit: Iir_Design_Unit; Loc : Location_Type)
is
use Vhdl.Scanner;
Design_File : constant Iir_Design_File := Get_Design_File (Design_Unit);
Fe : Source_File_Entry;
Line, Off: Natural;
Pos: Source_Ptr;
Res: Iir;
Checksum : File_Checksum_Id;
begin
-- The unit must not be loaded.
pragma Assert (Get_Date_State (Design_Unit) = Date_Disk);
Fe := Get_Design_File_Source (Design_File);
if Fe = No_Source_File_Entry then
-- Load the file in memory.
Fe := Files_Map.Read_Source_File
(Get_Design_File_Directory (Design_File),
Get_Design_File_Filename (Design_File));
if Fe = No_Source_File_Entry then
Error_Lib_Msg ("cannot load %n", +Get_Library_Unit (Design_Unit));
raise Compilation_Error;
end if;
Set_Design_File_Source (Design_File, Fe);
-- Check if the file has changed (but only if it has a checksum).
Checksum := Get_File_Checksum (Design_File);
if Checksum /= No_File_Checksum_Id
and then
not Files_Map.Is_Eq (Files_Map.Get_File_Checksum (Fe), Checksum)
then
Error_Msg_Sem (+Loc, "file %i has changed and must be reanalysed",
+Get_Design_File_Filename (Design_File));
raise Compilation_Error;
end if;
end if;
if Get_Date (Design_Unit) = Date_Obsolete then
Error_Msg_Sem (+Loc, "%n has been obsoleted",
+Get_Library_Unit (Design_Unit));
raise Compilation_Error;
end if;
-- Set the position of the lexer
Set_File (Fe);
Pos := Get_Design_Unit_Source_Pos (Design_Unit);
Line := Natural (Get_Design_Unit_Source_Line (Design_Unit));
Off := Natural (Get_Design_Unit_Source_Col (Design_Unit));
Files_Map.File_Add_Line_Number (Get_Current_Source_File, Line, Pos);
Set_Current_Position (Pos + Source_Ptr (Off));
-- Parse
Scan;
Res := Vhdl.Parse.Parse_Design_Unit;
Close_File;
if Res = Null_Iir then
raise Compilation_Error;
end if;
Set_Date_State (Design_Unit, Date_Parse);
-- FIXME: check the library unit read is the one expected.
-- Move the unit in the library: keep the design_unit of the library,
-- but replace the library_unit by the one that has been parsed. Do
-- not forget to relocate parents.
Vhdl.Utils.Free_Recursive (Get_Library_Unit (Design_Unit));
Set_Library_Unit (Design_Unit, Get_Library_Unit (Res));
Set_Design_Unit (Get_Library_Unit (Res), Design_Unit);
Set_Parent (Get_Library_Unit (Res), Design_Unit);
declare
Item : Iir;
begin
Item := Get_Context_Items (Res);
Set_Context_Items (Design_Unit, Item);
while Is_Valid (Item) loop
Set_Parent (Item, Design_Unit);
Item := Get_Chain (Item);
end loop;
end;
Location_Copy (Design_Unit, Res);
Free_Dependence_List (Design_Unit);
Set_Dependence_List (Design_Unit, Get_Dependence_List (Res));
Set_Dependence_List (Res, Null_Iir_List);
Free_Iir (Res);
end Load_Parse_Design_Unit;
procedure Error_Obsolete
(Loc : Location_Type; Msg : String; Args : Earg_Arr) is
begin
if not Flags.Flag_Elaborate_With_Outdated then
Error_Msg_Sem (Loc, Msg, Args);
end if;
end Error_Obsolete;
-- Check if one of its dependency makes this unit obsolete.
function Check_Obsolete_Dependence (Design_Unit : Iir; Loc : Location_Type)
return Boolean
is
List : constant Iir_List := Get_Dependence_List (Design_Unit);
Du_Ts : constant Time_Stamp_Id :=
Get_Analysis_Time_Stamp (Get_Design_File (Design_Unit));
U_Ts : Time_Stamp_Id;
El : Iir;
It : List_Iterator;
begin
if List = Null_Iir_List then
return False;
end if;
It := List_Iterate (List);
while Is_Valid (It) loop
El := Get_Element (It);
if Get_Kind (El) = Iir_Kind_Design_Unit then
U_Ts := Get_Analysis_Time_Stamp (Get_Design_File (El));
if Files_Map.Is_Gt (U_Ts, Du_Ts) then
Error_Obsolete
(Loc, "%n is obsoleted by %n", (+Design_Unit, +El));
return True;
end if;
end if;
Next (It);
end loop;
return False;
end Check_Obsolete_Dependence;
procedure Explain_Obsolete
(Design_Unit : Iir_Design_Unit; Loc : Location_Type)
is
List : Iir_List;
It : List_Iterator;
El : Iir;
begin
pragma Assert (Get_Date_State (Design_Unit) = Date_Analyze);
pragma Assert (Get_Date (Design_Unit) = Date_Obsolete);
List := Get_Dependence_List (Design_Unit);
if List = Null_Iir_List then
-- Argh, we don't know why.
Error_Obsolete (Loc, "%n is obsolete", (1 => +Design_Unit));
return;
end if;
It := List_Iterate (List);
while Is_Valid (It) loop
El := Get_Element (It);
if Get_Date (El) = Date_Obsolete then
Error_Obsolete (Loc, "%n is obsoleted by %n", (+Design_Unit, +El));
return;
end if;
Next (It);
end loop;
end Explain_Obsolete;
-- Load, parse, analyze, back-end a design_unit if necessary.
procedure Load_Design_Unit
(Design_Unit : Iir_Design_Unit; Loc : Location_Type)
is
Prev_Nbr_Errors : Natural;
Warnings : Warnings_Setting;
Error : Boolean;
begin
if Get_Date (Design_Unit) = Date_Replacing then
Error_Msg_Sem (+Loc, "circular reference of %n", +Design_Unit);
return;
end if;
-- Save and clear Nbr_Errors so that the unit is fully analyzed even
-- if there were errors.
Prev_Nbr_Errors := Errorout.Nbr_Errors;
Errorout.Nbr_Errors := 0;
-- Disable all warnings. Warnings are emitted only when the unit
-- is analyzed.
Save_Warnings_Setting (Warnings);
Disable_All_Warnings;
if Get_Date_State (Design_Unit) = Date_Disk then
Load_Parse_Design_Unit (Design_Unit, Loc);
end if;
Error := False;
if Get_Date_State (Design_Unit) = Date_Parse then
-- Analyze the design unit.
if Get_Date (Design_Unit) = Date_Analyzed then
-- Work-around for an internal check in sem.
-- FIXME: to be removed ?
Set_Date (Design_Unit, Date_Parsed);
end if;
-- Avoid infinite recursion, if the unit is self-referenced.
Set_Date_State (Design_Unit, Date_Analyze);
-- Analyze unit.
Finish_Compilation (Design_Unit);
-- Check if one of its dependency makes this unit obsolete.
-- FIXME: to do when the dependency is added ?
if not Flags.Flag_Elaborate_With_Outdated
and then Check_Obsolete_Dependence (Design_Unit, Loc)
then
Set_Date (Design_Unit, Date_Obsolete);
Error := True;
end if;
end if;
-- Restore nbr_errors (accumulate).
Errorout.Nbr_Errors := Prev_Nbr_Errors + Errorout.Nbr_Errors;
-- Restore warnings.
Restore_Warnings_Setting (Warnings);
if Error then
-- Return now in case of analyze error.
return;
end if;
case Get_Date (Design_Unit) is
when Date_Parsed =>
raise Internal_Error;
when Date_Analyzing =>
-- Self-referenced unit.
return;
when Date_Analyzed =>
-- FIXME: Accept it silently ?
-- Note: this is used when Flag_Elaborate_With_Outdated is set.
-- This is also used by anonymous configuration declaration.
null;
when Date_Uptodate =>
return;
when Date_Valid =>
null;
when Date_Obsolete =>
if not Flags.Flag_Elaborate_With_Outdated then
Explain_Obsolete (Design_Unit, Loc);
end if;
when others =>
raise Internal_Error;
end case;
end Load_Design_Unit;
procedure Load_Design_Unit (Design_Unit: Iir_Design_Unit; Loc : Iir) is
begin
Load_Design_Unit (Design_Unit, Get_Location (Loc));
end Load_Design_Unit;
function Load_Primary_Unit
(Library: Iir_Library_Declaration; Name: Name_Id; Loc : Iir)
return Iir_Design_Unit
is
Design_Unit: Iir_Design_Unit;
begin
Design_Unit := Find_Primary_Unit (Library, Name);
if Design_Unit /= Null_Iir then
Load_Design_Unit (Design_Unit, Loc);
end if;
return Design_Unit;
end Load_Primary_Unit;
-- Load an secondary unit and analyse it.
function Load_Secondary_Unit
(Primary: Iir_Design_Unit; Name: Name_Id; Loc : Iir)
return Iir_Design_Unit
is
Design_Unit: Iir_Design_Unit;
begin
Design_Unit := Find_Secondary_Unit (Primary, Name);
if Design_Unit /= Null_Iir then
Load_Design_Unit (Design_Unit, Loc);
end if;
return Design_Unit;
end Load_Secondary_Unit;
end Vhdl.Sem_Lib;
|