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|
-- Semantic analysis.
-- 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 GCC; see the file COPYING. If not, write to the Free
-- Software Foundation, 59 Temple Place - Suite 330, Boston, MA
-- 02111-1307, USA.
with Evaluation; use Evaluation;
with Errorout; use Errorout;
with Flags;
with Types; use Types;
with Iirs_Utils; use Iirs_Utils;
with Sem_Names; use Sem_Names;
with Sem_Expr; use Sem_Expr;
with Iir_Chains; use Iir_Chains;
with Xrefs;
package body Sem_Assocs is
-- Semantize all arguments of ASSOC_CHAIN
-- Return TRUE if no error.
function Sem_Actual_Of_Association_Chain (Assoc_Chain : Iir)
return Boolean
is
Has_Named : Boolean;
Ok : Boolean;
Assoc : Iir;
Res : Iir;
Formal : Iir;
begin
-- Semantize all arguments
-- OK is false if there is an error during semantic of one of the
-- argument, but continue semantisation.
Has_Named := False;
Ok := True;
Assoc := Assoc_Chain;
while Assoc /= Null_Iir loop
Formal := Get_Formal (Assoc);
if Formal /= Null_Iir then
Has_Named := True;
-- FIXME: check FORMAL is well composed.
elsif Has_Named then
Error_Msg_Sem ("positional argument after named argument", Assoc);
Ok := False;
end if;
if Get_Kind (Assoc) /= Iir_Kind_Association_Element_Open then
Res := Sem_Expression_Ov (Get_Actual (Assoc), Null_Iir);
if Res = Null_Iir then
Ok := False;
else
Set_Actual (Assoc, Res);
end if;
end if;
Assoc := Get_Chain (Assoc);
end loop;
return Ok;
end Sem_Actual_Of_Association_Chain;
function Get_Mode_Name (Mode : Iir_Mode) return String is
begin
case Mode is
when Iir_Unknown_Mode =>
raise Internal_Error;
when Iir_Linkage_Mode =>
return "linkage";
when Iir_Buffer_Mode =>
return "buffer";
when Iir_Out_Mode =>
return "out";
when Iir_Inout_Mode =>
return "inout";
when Iir_In_Mode =>
return "in";
end case;
end Get_Mode_Name;
procedure Check_Parameter_Association_Restriction
(Inter : Iir; Base_Actual : Iir; Loc : Iir)
is
Act_Mode : Iir_Mode;
For_Mode : Iir_Mode;
begin
Act_Mode := Get_Mode (Base_Actual);
For_Mode := Get_Mode (Inter);
case Get_Mode (Inter) is
when Iir_In_Mode =>
if Act_Mode in Iir_In_Modes or Act_Mode = Iir_Buffer_Mode then
return;
end if;
when Iir_Out_Mode =>
-- FIXME: should buffer also be accepted ?
if Act_Mode in Iir_Out_Modes or Act_Mode = Iir_Buffer_Mode then
return;
end if;
when Iir_Inout_Mode =>
if Act_Mode = Iir_Inout_Mode then
return;
end if;
when others =>
Error_Kind ("check_parameter_association_restriction", Inter);
end case;
Error_Msg_Sem
("cannot associate an " & Get_Mode_Name (Act_Mode)
& " object with " & Get_Mode_Name (For_Mode) & " "
& Disp_Node (Inter), Loc);
end Check_Parameter_Association_Restriction;
procedure Check_Subprogram_Associations
(Inter_Chain : Iir; Assoc_Chain : Iir)
is
Assoc : Iir;
Formal : Iir;
Formal_Inter : Iir;
Actual : Iir;
Prefix : Iir;
Object : Iir;
Inter : Iir;
begin
Assoc := Assoc_Chain;
Inter := Inter_Chain;
while Assoc /= Null_Iir loop
Formal := Get_Formal (Assoc);
if Formal = Null_Iir then
-- Association by position.
Formal_Inter := Inter;
Inter := Get_Chain (Inter);
else
-- Association by name.
Formal_Inter := Get_Base_Name (Formal);
Inter := Null_Iir;
end if;
case Get_Kind (Assoc) is
when Iir_Kind_Association_Element_Open =>
if Get_Default_Value (Formal_Inter) = Null_Iir then
Error_Msg_Sem
("no parameter for " & Disp_Node (Formal_Inter), Assoc);
end if;
when Iir_Kind_Association_Element_By_Expression =>
Actual := Get_Actual (Assoc);
Object := Name_To_Object (Actual);
if Object /= Null_Iir then
Prefix := Get_Object_Prefix (Object);
else
Prefix := Actual;
end if;
case Get_Kind (Formal_Inter) is
when Iir_Kind_Signal_Interface_Declaration =>
-- LRM93 2.1.1
-- In a subprogram call, the actual designator
-- associated with a formal parameter of class
-- signal must be a signal.
case Get_Kind (Prefix) is
when Iir_Kind_Signal_Interface_Declaration
| Iir_Kind_Signal_Declaration
| Iir_Kind_Guard_Signal_Declaration
| Iir_Kinds_Signal_Attribute =>
-- LRM93 2.1.1.2
-- If an actual signal is associated with
-- a signal parameter of any mode, the actual
-- must be denoted by a static signal name.
if Get_Name_Staticness (Object) < Globally then
Error_Msg_Sem
("actual signal must be a static name",
Actual);
else
-- Inherit has_active_flag.
Set_Has_Active_Flag
(Prefix, Get_Has_Active_Flag (Formal_Inter));
end if;
when others =>
Error_Msg_Sem
("signal parameter requires a signal expression",
Assoc);
end case;
case Get_Kind (Prefix) is
when Iir_Kind_Signal_Interface_Declaration =>
Check_Parameter_Association_Restriction
(Formal_Inter, Prefix, Assoc);
when Iir_Kind_Guard_Signal_Declaration =>
if Get_Mode (Formal_Inter) /= Iir_In_Mode then
Error_Msg_Sem
("cannot associate a guard signal with "
& Get_Mode_Name (Get_Mode (Formal_Inter))
& " " & Disp_Node (Formal_Inter), Assoc);
end if;
when Iir_Kinds_Signal_Attribute =>
if Get_Mode (Formal_Inter) /= Iir_In_Mode then
Error_Msg_Sem
("cannot associate a signal attribute with "
& Get_Mode_Name (Get_Mode (Formal_Inter))
& " " & Disp_Node (Formal_Inter), Assoc);
end if;
when others =>
null;
end case;
-- LRM 2.1.1.2 Signal parameters
-- It is an error if a conversion function or type
-- conversion appears in either the formal part or the
-- actual part of an association element that associates
-- an actual signal with a formal signal parameter.
if Get_In_Conversion (Assoc) /= Null_Iir
or Get_Out_Conversion (Assoc) /= Null_Iir
then
Error_Msg_Sem ("conversion are not allowed for "
& "signal parameters", Assoc);
end if;
when Iir_Kind_Variable_Interface_Declaration =>
-- LRM93 2.1.1
-- The actual designator associated with a formal of
-- class variable must be a variable.
case Get_Kind (Prefix) is
when Iir_Kind_Variable_Interface_Declaration =>
Check_Parameter_Association_Restriction
(Formal_Inter, Prefix, Assoc);
when Iir_Kind_Variable_Declaration
| Iir_Kind_Dereference
| Iir_Kind_Implicit_Dereference =>
null;
when Iir_Kind_File_Interface_Declaration
| Iir_Kind_File_Declaration =>
-- LRM87 4.3.1.4
-- Such an object is a member of the variable
-- class of objects;
if Flags.Vhdl_Std >= Vhdl_93 then
Error_Msg_Sem ("in vhdl93, variable parameter "
& "cannot be a file", Assoc);
end if;
when others =>
Error_Msg_Sem
("variable parameter must be a variable", Assoc);
end case;
when Iir_Kind_File_Interface_Declaration =>
-- LRM93 2.1.1
-- The actual designator associated with a formal
-- of class file must be a file.
case Get_Kind (Prefix) is
when Iir_Kind_File_Interface_Declaration
| Iir_Kind_File_Declaration =>
null;
when Iir_Kind_Variable_Declaration
| Iir_Kind_Variable_Interface_Declaration =>
if Flags.Vhdl_Std >= Vhdl_93 then
Error_Msg_Sem ("in vhdl93, file parameter "
& "must be a file", Assoc);
end if;
when others =>
Error_Msg_Sem
("file parameter must be a file", Assoc);
end case;
-- LRM 2.1.1.3 File parameters
-- It is an error if an association element associates
-- an actual with a formal parameter of a file type and
-- that association element contains a conversion
-- function or type conversion.
if Get_In_Conversion (Assoc) /= Null_Iir
or Get_Out_Conversion (Assoc) /= Null_Iir
then
Error_Msg_Sem ("conversion are not allowed for "
& "file parameters", Assoc);
end if;
when Iir_Kind_Constant_Interface_Declaration =>
-- LRM93 2.1.1
-- The actual designator associated with a formal of
-- class constant must be an expression.
Check_Read (Actual);
when others =>
Error_Kind
("check_subprogram_association(3)", Formal_Inter);
end case;
when Iir_Kind_Association_Element_By_Individual =>
null;
when others =>
Error_Kind ("check_subprogram_associations", Assoc);
end case;
Assoc := Get_Chain (Assoc);
end loop;
end Check_Subprogram_Associations;
-- Assocs_Right_Map (FORMAL_MODE, ACTUAL_MODE) is true iff it is allowed
-- to associate a formal port of mode FORMAL_MODE with an actual port of
-- mode ACTUAL_MODE.
subtype Iir_Known_Mode is Iir_Mode range Iir_Linkage_Mode .. Iir_In_Mode;
type Assocs_Right_Map is array (Iir_Known_Mode, Iir_Known_Mode) of Boolean;
Vhdl93_Assocs_Map : constant Assocs_Right_Map :=
(Iir_Linkage_Mode => (others => True),
Iir_Buffer_Mode => (Iir_Buffer_Mode => True, others => False),
Iir_Out_Mode => (Iir_Out_Mode | Iir_Inout_Mode => True,
others => False),
Iir_Inout_Mode => (Iir_Inout_Mode => True,
others => False),
Iir_In_Mode => (Iir_In_Mode | Iir_Inout_Mode | Iir_Buffer_Mode => True,
others => False));
Vhdl02_Assocs_Map : constant Assocs_Right_Map :=
(Iir_Linkage_Mode => (others => True),
Iir_Buffer_Mode => (Iir_Out_Mode | Iir_Inout_Mode
| Iir_Buffer_Mode => True,
others => False),
Iir_Out_Mode => (Iir_Out_Mode | Iir_Inout_Mode | Iir_Buffer_Mode => True,
others => False),
Iir_Inout_Mode => (Iir_Inout_Mode | Iir_Buffer_Mode => True,
others => False),
Iir_In_Mode => (Iir_In_Mode | Iir_Inout_Mode | Iir_Buffer_Mode => True,
others => False));
-- Check for restrictions in LRM 1.1.1.2
-- Return FALSE in case of error.
function Check_Port_Association_Restriction
(Formal : Iir_Signal_Interface_Declaration;
Actual : Iir_Signal_Interface_Declaration;
Assoc : Iir)
return Boolean
is
Fmode : Iir_Mode;
Amode : Iir_Mode;
begin
Fmode := Get_Mode (Formal);
Amode := Get_Mode (Actual);
if Fmode = Iir_Unknown_Mode or Amode = Iir_Unknown_Mode then
raise Internal_Error;
end if;
if Flags.Vhdl_Std < Vhdl_02 then
if Vhdl93_Assocs_Map (Fmode, Amode) then
return True;
end if;
else
if Vhdl02_Assocs_Map (Fmode, Amode) then
return True;
end if;
end if;
Error_Msg_Sem
("cannot associate " & Get_Mode_Name (Fmode) & " "
& Disp_Node (Formal) & " with actual port of mode "
& Get_Mode_Name (Amode), Assoc);
return False;
end Check_Port_Association_Restriction;
-- Handle indexed name
-- FORMAL is the formal name to be handled.
-- SUB_ASSOC is an association_by_individual in which the formal will be
-- inserted.
-- Update SUB_ASSOC so that it designates FORMAL.
procedure Add_Individual_Assoc_Indexed_Name
(Sub_Assoc : in out Iir; Formal : Iir)
is
Choice : Iir;
Last_Choice : Iir;
Index_List : Iir_List;
Index : Iir;
Nbr : Natural;
begin
-- Find element.
Index_List := Get_Index_List (Formal);
Nbr := Get_Nbr_Elements (Index_List);
for I in 0 .. Nbr - 1 loop
Index := Get_Nth_Element (Index_List, I);
-- Evaluate index.
Index := Eval_Expr (Index);
Replace_Nth_Element (Index_List, I, Index);
-- Find index in choice list.
Last_Choice := Null_Iir;
Choice := Get_Individual_Association_Chain (Sub_Assoc);
while Choice /= Null_Iir loop
case Get_Kind (Choice) is
when Iir_Kind_Choice_By_Expression =>
if Eval_Pos (Get_Expression (Choice)) = Eval_Pos (Index) then
goto Found;
end if;
when Iir_Kind_Choice_By_Range =>
if Eval_Int_In_Range (Eval_Pos (Index),
Get_Expression (Choice))
then
-- FIXME: overlap.
raise Internal_Error;
end if;
when others =>
Error_Kind ("add_individual_assoc_index_name", Choice);
end case;
Last_Choice := Choice;
Choice := Get_Chain (Choice);
end loop;
-- If not found, append it.
Choice := Create_Iir (Iir_Kind_Choice_By_Expression);
Set_Expression (Choice, Index);
Location_Copy (Choice, Formal);
if Last_Choice = Null_Iir then
Set_Individual_Association_Chain (Sub_Assoc, Choice);
else
Set_Chain (Last_Choice, Choice);
end if;
<< Found >> null;
if I < Nbr - 1 then
Sub_Assoc := Get_Associated (Choice);
if Sub_Assoc = Null_Iir then
Sub_Assoc := Create_Iir
(Iir_Kind_Association_Element_By_Individual);
Location_Copy (Sub_Assoc, Index);
Set_Associated (Choice, Sub_Assoc);
end if;
else
Sub_Assoc := Choice;
end if;
end loop;
end Add_Individual_Assoc_Indexed_Name;
procedure Add_Individual_Assoc_Slice_Name
(Sub_Assoc : in out Iir; Formal : Iir)
is
Choice : Iir;
Index : Iir;
begin
-- FIXME: handle cases such as param(5 to 6)(5)
-- Find element.
Index := Get_Suffix (Formal);
-- Evaluate index.
Index := Eval_Expr (Index);
Set_Suffix (Formal, Index);
Choice := Create_Iir (Iir_Kind_Choice_By_Range);
Location_Copy (Choice, Formal);
Set_Expression (Choice, Index);
Set_Chain (Choice, Get_Individual_Association_Chain (Sub_Assoc));
Set_Individual_Association_Chain (Sub_Assoc, Choice);
Sub_Assoc := Choice;
end Add_Individual_Assoc_Slice_Name;
procedure Add_Individual_Assoc_Selected_Name
(Sub_Assoc : in out Iir; Formal : Iir)
is
Choice : Iir;
begin
Choice := Create_Iir (Iir_Kind_Choice_By_Name);
Location_Copy (Choice, Formal);
Set_Name (Choice, Get_Selected_Element (Formal));
Set_Chain (Choice, Get_Individual_Association_Chain (Sub_Assoc));
Set_Individual_Association_Chain (Sub_Assoc, Choice);
Sub_Assoc := Choice;
end Add_Individual_Assoc_Selected_Name;
procedure Add_Individual_Association_1 (Iassoc : in out Iir; Formal : Iir)
is
Sub : Iir;
Formal_Object : Iir;
begin
Formal_Object := Name_To_Object (Formal);
case Get_Kind (Formal_Object) is
when Iir_Kind_Indexed_Name
| Iir_Kind_Slice_Name
| Iir_Kind_Selected_Element =>
Add_Individual_Association_1 (Iassoc, Get_Prefix (Formal_Object));
when Iir_Kinds_Interface_Declaration =>
return;
when others =>
Error_Kind ("add_individual_association_1", Formal);
end case;
case Get_Kind (Iassoc) is
when Iir_Kind_Association_Element_By_Individual =>
null;
when Iir_Kind_Choice_By_Expression =>
Sub := Get_Associated (Iassoc);
if Sub = Null_Iir then
Sub := Create_Iir (Iir_Kind_Association_Element_By_Individual);
Location_Copy (Sub, Formal);
Set_Formal (Sub, Iassoc);
Iassoc := Sub;
else
case Get_Kind (Sub) is
when Iir_Kind_Association_Element_By_Individual =>
Iassoc := Sub;
when others =>
Error_Msg_Sem
("individual association of "
& Disp_Node (Get_Associated_Formal (Iassoc))
& " conflicts with that at " & Disp_Location (Sub),
Formal);
return;
end case;
end if;
when others =>
Error_Kind ("add_individual_association_1(2)", Iassoc);
end case;
case Get_Kind (Formal_Object) is
when Iir_Kind_Indexed_Name =>
Add_Individual_Assoc_Indexed_Name (Iassoc, Formal_Object);
when Iir_Kind_Slice_Name =>
Add_Individual_Assoc_Slice_Name (Iassoc, Formal_Object);
when Iir_Kind_Selected_Element =>
Add_Individual_Assoc_Selected_Name (Iassoc, Formal_Object);
when others =>
Error_Kind ("add_individual_association_1(3)", Formal);
end case;
end Add_Individual_Association_1;
procedure Add_Individual_Association (Iassoc : Iir; Assoc : Iir)
is
Formal : Iir;
Iass : Iir;
Prev : Iir;
begin
Formal := Get_Formal (Assoc);
Iass := Iassoc;
Add_Individual_Association_1 (Iass, Formal);
Prev := Get_Associated (Iass);
if Prev /= Null_Iir then
Error_Msg_Sem ("individual association of "
& Disp_Node (Get_Base_Name (Formal))
& " conflicts with that at " & Disp_Location (Prev),
Assoc);
else
Set_Associated (Iass, Assoc);
end if;
end Add_Individual_Association;
procedure Finish_Individual_Assoc_Array_Subtype (Assoc : Iir; Atype : Iir)
is
Index_Tlist : Iir_List;
Index_Type : Iir;
Low, High : Iir;
Chain : Iir;
begin
Index_Tlist := Get_Index_Subtype_List (Atype);
for I in Natural loop
Index_Type := Get_Nth_Element (Index_Tlist, I);
exit when Index_Type = Null_Iir;
Chain := Get_Individual_Association_Chain (Assoc);
Sem_Choices_Range
(Chain, Index_Type, False, Get_Location (Assoc), Low, High);
Set_Individual_Association_Chain (Assoc, Chain);
end loop;
end Finish_Individual_Assoc_Array_Subtype;
procedure Finish_Individual_Assoc_Array
(Actual : Iir; Assoc : Iir; Dim : Natural)
is
Actual_Type : Iir;
Actual_Index : Iir;
Base_Type : Iir;
Base_Index : Iir;
Low, High : Iir;
Chain : Iir;
begin
Actual_Type := Get_Actual_Type (Actual);
Actual_Index := Get_Nth_Element (Get_Index_Subtype_List (Actual_Type),
Dim - 1);
if Actual_Index /= Null_Iir then
Base_Index := Actual_Index;
else
Base_Type := Get_Base_Type (Actual_Type);
Base_Index := Get_Nth_Element (Get_Index_Subtype_List (Base_Type),
Dim - 1);
end if;
Chain := Get_Individual_Association_Chain (Assoc);
Sem_Choices_Range
(Chain, Base_Index, True, Get_Location (Assoc), Low, High);
Set_Individual_Association_Chain (Assoc, Chain);
if Actual_Index = Null_Iir then
declare
Index_Constraint : Iir;
Index_Subtype_Constraint : Iir;
begin
-- Create an index subtype.
case Get_Kind (Base_Index) is
when Iir_Kind_Integer_Subtype_Definition =>
Actual_Index :=
Create_Iir (Iir_Kind_Integer_Subtype_Definition);
when Iir_Kind_Enumeration_Type_Definition
| Iir_Kind_Enumeration_Subtype_Definition =>
Actual_Index :=
Create_Iir (Iir_Kind_Enumeration_Subtype_Definition);
when others =>
Error_Kind ("finish_individual_assoc_array", Base_Index);
end case;
Location_Copy (Actual_Index, Actual);
Set_Base_Type (Actual_Index, Get_Base_Type (Base_Index));
Index_Constraint := Get_Range_Constraint (Base_Index);
Index_Subtype_Constraint := Create_Iir (Iir_Kind_Range_Expression);
Location_Copy (Index_Subtype_Constraint, Actual);
Set_Range_Constraint (Actual_Index, Index_Subtype_Constraint);
Set_Type_Staticness (Actual_Index, Locally);
Set_Direction (Index_Subtype_Constraint,
Get_Direction (Index_Constraint));
case Get_Direction (Index_Constraint) is
when Iir_To =>
Set_Left_Limit (Index_Subtype_Constraint, Low);
Set_Right_Limit (Index_Subtype_Constraint, High);
when Iir_Downto =>
Set_Left_Limit (Index_Subtype_Constraint, High);
Set_Right_Limit (Index_Subtype_Constraint, Low);
end case;
Set_Expr_Staticness (Index_Subtype_Constraint, Locally);
Append_Element (Get_Index_Subtype_List (Actual_Type),
Actual_Index);
end;
else
declare
Act_High, Act_Low : Iir;
begin
Get_Low_High_Limit (Get_Range_Constraint (Actual_Type),
Act_Low, Act_High);
if Eval_Pos (Act_Low) /= Eval_Pos (Low)
or Eval_Pos (Act_High) /= Eval_Pos (High)
then
Error_Msg_Sem ("indexes of individual association mismatch",
Assoc);
end if;
end;
end if;
end Finish_Individual_Assoc_Array;
procedure Finish_Individual_Assoc_Record (Assoc : Iir; Atype : Iir)
is
Base_Type : Iir_Record_Type_Definition;
Matches : Iir_Array_Acc;
Ch : Iir;
Pos : Natural;
Rec_El : Iir;
begin
Base_Type := Get_Base_Type (Atype);
Matches := new Iir_Array
(0 .. Natural (Get_Number_Element_Declaration (Base_Type)) - 1);
Matches.all := (others => Null_Iir);
Ch := Get_Individual_Association_Chain (Assoc);
while Ch /= Null_Iir loop
Rec_El := Get_Name (Ch);
Pos := Natural (Get_Element_Position (Rec_El));
if Matches (Pos) /= Null_Iir then
Error_Msg_Sem ("individual " & Disp_Node (Rec_El)
& " already associated at "
& Disp_Location (Matches (Pos)), Ch);
else
Matches (Pos) := Ch;
end if;
Ch := Get_Chain (Ch);
end loop;
Rec_El := Get_Element_Declaration_Chain (Base_Type);
for I in Matches'Range loop
if Matches (I) = Null_Iir then
Error_Msg_Sem (Disp_Node (Rec_El) & " not associated", Assoc);
end if;
Rec_El := Get_Chain (Rec_El);
end loop;
Set_Actual_Type (Assoc, Atype);
end Finish_Individual_Assoc_Record;
-- Called by sem_individual_association to finish the semantization of
-- individual association ASSOC.
procedure Finish_Individual_Association (Assoc : Iir)
is
Formal : Iir;
Atype : Iir;
begin
-- Guard.
if Assoc = Null_Iir then
return;
end if;
Formal := Get_Associated_Formal (Assoc);
Atype := Get_Type (Formal);
case Get_Kind (Atype) is
when Iir_Kind_Array_Subtype_Definition =>
Finish_Individual_Assoc_Array_Subtype (Assoc, Atype);
when Iir_Kind_Array_Type_Definition
| Iir_Kind_Unconstrained_Array_Subtype_Definition =>
Set_Actual_Type
(Assoc, Create_Array_Subtype (Atype, Get_Location (Assoc)));
Finish_Individual_Assoc_Array (Assoc, Assoc, 1);
when Iir_Kind_Record_Type_Definition
| Iir_Kind_Record_Subtype_Definition =>
Finish_Individual_Assoc_Record (Assoc, Atype);
when others =>
Error_Kind ("finish_individual_association", Atype);
end case;
end Finish_Individual_Association;
-- Sem individual associations of ASSOCS:
-- Add an Iir_Kind_Association_Element_By_Individual before each
-- group of individual association for the same formal, and call
-- Finish_Individual_Association with each of these added nodes.
procedure Sem_Individual_Association (Assoc_Chain : in out Iir)
is
Assoc : Iir;
Prev_Assoc : Iir;
Iassoc : Iir_Association_Element_By_Individual;
Cur_Iface : Iir;
Formal : Iir;
begin
Iassoc := Null_Iir;
Cur_Iface := Null_Iir;
Prev_Assoc := Null_Iir;
Assoc := Assoc_Chain;
while Assoc /= Null_Iir loop
Formal := Get_Formal (Assoc);
if Formal /= Null_Iir then
Formal := Get_Base_Name (Formal);
end if;
if Formal = Null_Iir or else Formal /= Cur_Iface then
-- New formal name, sem the current assoc.
Finish_Individual_Association (Iassoc);
Cur_Iface := Formal;
Iassoc := Null_Iir;
end if;
if Get_Whole_Association_Flag (Assoc) = False then
-- New individual association.
if Iassoc = Null_Iir then
Iassoc :=
Create_Iir (Iir_Kind_Association_Element_By_Individual);
Location_Copy (Iassoc, Assoc);
if Cur_Iface = Null_Iir then
raise Internal_Error;
end if;
Set_Formal (Iassoc, Cur_Iface);
-- Insert IASSOC.
if Prev_Assoc = Null_Iir then
Assoc_Chain := Iassoc;
else
Set_Chain (Prev_Assoc, Iassoc);
end if;
Set_Chain (Iassoc, Assoc);
end if;
Add_Individual_Association (Iassoc, Assoc);
end if;
Prev_Assoc := Assoc;
Assoc := Get_Chain (Assoc);
end loop;
-- There is maybe a remaining iassoc.
Finish_Individual_Association (Iassoc);
end Sem_Individual_Association;
-- EXPR is a formal or actual expression.
-- Extract conversion function CONV from EXPR, if:
-- * argument of the function is of type ARG_TYPE.
-- * return type of the function is RES_TYPE if RES_TYPE /= Null_Iir
-- or any type if RES_TYPE = Null_Iir.
-- procedure Sem_Conversion (Expr : in out Iir; Conv : out Iir)
-- is
-- Assoc : Iir;
-- begin
-- Conv := Null_Iir;
-- case Get_Kind (Expr) is
-- when Iir_Kind_Parenthesis_Name =>
-- raise Internal_Error;
-- when Iir_Kind_Function_Call =>
-- Conv := Get_Implementation (Expr);
-- Assoc := Get_Parameter_Association_Chain (Expr);
-- Expr := Get_Actual (Assoc);
-- Free_Iir (Assoc);
-- Set_Use_Flag (Conv, True);
-- when Iir_Kind_Type_Conversion =>
-- Assoc := Get_Expression (Expr);
-- Conv := Expr;
-- Expr := Assoc;
-- --Set_Expression (Conv, Null_Iir);
-- when others =>
-- return;
-- end case;
-- end Sem_Conversion;
function Is_Conversion_Function (Assoc_Chain : Iir) return Boolean
is
begin
-- [...] whose single parameter of the function [...]
if not Is_Chain_Length_One (Assoc_Chain) then
return False;
end if;
if Get_Kind (Assoc_Chain) /= Iir_Kind_Association_Element_By_Expression
then
return False;
end if;
-- FIXME: unfortunatly, the formal may already be set with the
-- interface.
-- if Get_Formal (Assoc_Chain) /= Null_Iir then
-- return Null_Iir;
-- end if;
return True;
end Is_Conversion_Function;
function Is_Expanded_Name (Name : Iir) return Boolean
is
Pfx : Iir;
begin
Pfx := Name;
loop
case Get_Kind (Pfx) is
when Iir_Kind_Simple_Name =>
return True;
when Iir_Kind_Selected_Name =>
Pfx := Get_Prefix (Pfx);
when others =>
return False;
end case;
end loop;
end Is_Expanded_Name;
-- Return TRUE iff FUNC is valid as a conversion function/type.
function Is_Valid_Conversion (Func : Iir) return Boolean is
begin
case Get_Kind (Func) is
when Iir_Kinds_Function_Declaration =>
if not Is_Chain_Length_One (Get_Interface_Declaration_Chain (Func))
then
return False;
end if;
when Iir_Kind_Type_Declaration
| Iir_Kind_Subtype_Declaration =>
if Flags.Vhdl_Std = Vhdl_87 then
return False;
end if;
when others =>
return False;
end case;
return True;
end Is_Valid_Conversion;
function Extract_Type_Of_Conversions (Convs : Iir) return Iir
is
Res_List : Iir_List;
Ov_List : Iir_List;
El : Iir;
begin
if not Is_Overload_List (Convs) then
if Is_Valid_Conversion (Convs) then
return Get_Type (Convs);
else
return Null_Iir;
end if;
else
Ov_List := Get_Overload_List (Convs);
Res_List := Create_Iir_List;
for I in Natural loop
El := Get_Nth_Element (Ov_List, I);
exit when El = Null_Iir;
if Is_Valid_Conversion (El) then
Add_Element (Res_List, Get_Type (El));
end if;
end loop;
return Simplify_Overload_List (Res_List);
end if;
end Extract_Type_Of_Conversions;
-- ASSOC is an association element not semantized and whose formal is a
-- parenthesis name. Try to extract a conversion function/type. In case
-- of success, return a new association element. In case of failure,
-- return NULL_IIR.
function Sem_Formal_Conversion (Assoc : Iir) return Iir
is
Formal : Iir;
Assoc_Chain : Iir;
Res : Iir;
Conv : Iir;
Name : Iir;
Conv_Func : Iir;
Conv_Type : Iir;
begin
Formal := Get_Formal (Assoc);
Assoc_Chain := Get_Association_Chain (Formal);
if not Is_Conversion_Function (Assoc_Chain) then
return Null_Iir;
end if;
-- Both the conversion function and the formal name must be names.
Conv := Get_Prefix (Formal);
-- FIXME: what about operator names (such as "not").
if Get_Kind (Conv) /= Iir_Kind_Simple_Name
and then not Is_Expanded_Name (Conv)
then
return Null_Iir;
end if;
Name := Get_Actual (Assoc_Chain);
if Get_Kind (Name) not in Iir_Kinds_Name then
return Null_Iir;
end if;
Sem_Name_Soft (Conv);
Conv_Func := Get_Named_Entity (Conv);
if Get_Kind (Conv_Func) = Iir_Kind_Error then
Conv_Type := Null_Iir;
else
Conv_Type := Extract_Type_Of_Conversions (Conv_Func);
end if;
if Conv_Type = Null_Iir then
Sem_Name_Clean (Conv);
return Null_Iir;
end if;
Set_Type (Conv, Conv_Type);
-- Create a new association with a conversion function.
Res := Create_Iir (Iir_Kind_Association_Element_By_Expression);
Set_Out_Conversion (Res, Conv);
Set_Formal (Res, Name);
Set_Actual (Res, Get_Actual (Assoc));
return Res;
end Sem_Formal_Conversion;
-- NAME is the formal name of an association, without any conversion
-- function or type.
-- Try to semantize NAME with INTERFACE.
-- In case of success, set PREFIX to the most prefix of NAME and NAME_TYPE
-- to the type of NAME.
-- In case of failure, set NAME_TYPE to NULL_IIR.
procedure Sem_Formal_Name (Name : Iir;
Inter : Iir;
Prefix : out Iir;
Name_Type : out Iir)
is
Base_Type : Iir;
Rec_El : Iir;
begin
case Get_Kind (Name) is
when Iir_Kind_Simple_Name =>
if Get_Identifier (Name) = Get_Identifier (Inter) then
Prefix := Name;
Name_Type := Get_Type (Inter);
else
Name_Type := Null_Iir;
end if;
return;
when Iir_Kind_Selected_Name =>
Sem_Formal_Name (Get_Prefix (Name), Inter, Prefix, Name_Type);
if Name_Type = Null_Iir then
return;
end if;
Base_Type := Get_Base_Type (Name_Type);
if Get_Kind (Base_Type) /= Iir_Kind_Record_Type_Definition then
Name_Type := Null_Iir;
return;
end if;
Rec_El := Find_Name_In_Chain
(Get_Element_Declaration_Chain (Base_Type),
Get_Suffix_Identifier (Name));
if Rec_El = Null_Iir then
Name_Type := Null_Iir;
return;
end if;
Name_Type := Get_Type (Rec_El);
return;
when Iir_Kind_Parenthesis_Name =>
-- More difficult: slice or indexed array.
Sem_Formal_Name (Get_Prefix (Name), Inter, Prefix, Name_Type);
if Name_Type = Null_Iir then
return;
end if;
Base_Type := Get_Base_Type (Name_Type);
if Get_Kind (Base_Type) /= Iir_Kind_Array_Type_Definition then
Name_Type := Null_Iir;
return;
end if;
declare
Chain : Iir;
Index_List : Iir_List;
Idx : Iir;
begin
Chain := Get_Association_Chain (Name);
Index_List := Get_Index_Subtype_List (Base_Type);
-- Check for matching length.
if Get_Chain_Length (Chain) /= Get_Nbr_Elements (Index_List)
then
Name_Type := Null_Iir;
return;
end if;
if Get_Kind (Chain)
/= Iir_Kind_Association_Element_By_Expression
then
Name_Type := Null_Iir;
return;
end if;
Idx := Get_Actual (Chain);
if (not Is_Chain_Length_One (Chain))
or else (Get_Kind (Idx) /= Iir_Kind_Range_Expression
and then not Is_Range_Attribute_Name (Idx))
-- FIXME: what about subtype !
then
-- Indexed name.
Name_Type := Get_Element_Subtype (Base_Type);
return;
end if;
-- Slice.
return;
end;
when others =>
Error_Kind ("sem_formal_name", Name);
end case;
end Sem_Formal_Name;
-- Return a type or a list of types for a formal expression FORMAL
-- corresponding to INTERFACE. Possible cases are:
-- * FORMAL is the simple name with the same identifier as INTERFACE,
-- FORMAL_TYPE is set to the type of INTERFACE and CONV_TYPE is set
-- to NULL_IIR.
-- * FORMAL is a selected, indexed or slice name whose extreme prefix is
-- a simple name with the same identifier as INTERFACE, FORMAL_TYPE
-- is set to the type of the name, and CONV_TYPE is set to NULL_IIR.
-- * FORMAL is a function call, whose only argument is an
-- association_element_by_expression, whose actual is a name
-- whose prefix is the same identifier as INTERFACE (note, since FORMAL
-- is not semantized, this is parenthesis name), CONV_TYPE is set to
-- the type or list of type of return type of conversion functions and
-- FORMAL_TYPE is set to the type of the name.
-- * otherwise, FORMAL cannot match INTERFACE and both FORMAL_TYPE and
-- CONV_TYPE are set to NULL_IIR.
-- If FINISH is true, the simple name is replaced by INTERFACE.
type Param_Assoc_Type is (None, Open, Individual, Whole);
function Sem_Formal (Formal : Iir; Inter : Iir) return Param_Assoc_Type
is
Prefix : Iir;
Formal_Type : Iir;
begin
case Get_Kind (Formal) is
when Iir_Kind_Simple_Name =>
-- Certainly the most common case: FORMAL_NAME => VAL.
-- It is also the easiest. So, handle it completly now.
if Get_Identifier (Formal) = Get_Identifier (Inter) then
Formal_Type := Get_Type (Inter);
Set_Named_Entity (Formal, Inter);
Set_Type (Formal, Formal_Type);
--Xrefs.Xref_Name (Formal);
return Whole;
end if;
return None;
when Iir_Kind_Selected_Name
| Iir_Kind_Slice_Name
| Iir_Kind_Parenthesis_Name =>
null;
when others =>
-- Should have been caught by sem_association_list.
Error_Kind ("sem_formal", Formal);
end case;
-- Check for a sub-element.
Sem_Formal_Name (Formal, Inter, Prefix, Formal_Type);
if Formal_Type /= Null_Iir then
Set_Type (Formal, Formal_Type);
Set_Named_Entity (Prefix, Inter);
return Individual;
else
return None;
end if;
end Sem_Formal;
function Is_Valid_Conversion
(Func : Iir; Res_Base_Type : Iir; Param_Base_Type : Iir)
return Boolean
is
R_Type : Iir;
P_Type : Iir;
begin
case Get_Kind (Func) is
when Iir_Kinds_Function_Declaration =>
R_Type := Get_Type (Func);
P_Type := Get_Type (Get_Interface_Declaration_Chain (Func));
if Get_Base_Type (R_Type) = Res_Base_Type
and then Get_Base_Type (P_Type) = Param_Base_Type
then
return True;
else
return False;
end if;
when Iir_Kind_Type_Declaration
| Iir_Kind_Subtype_Declaration =>
R_Type := Get_Type (Func);
if Get_Base_Type (R_Type) = Res_Base_Type
and then Are_Types_Closely_Related (R_Type, Param_Base_Type)
then
return True;
else
return False;
end if;
when Iir_Kind_Function_Call =>
return Is_Valid_Conversion (Get_Implementation (Func),
Res_Base_Type, Param_Base_Type);
when Iir_Kind_Type_Conversion =>
return Is_Valid_Conversion (Get_Type_Mark (Func),
Res_Base_Type, Param_Base_Type);
when others =>
Error_Kind ("is_valid_conversion(2)", Func);
end case;
end Is_Valid_Conversion;
function Extract_Conversion
(Conv : Iir; Res_Type : Iir; Param_Type : Iir; Loc : Iir)
return Iir
is
List : Iir_List;
Res_Base_Type : Iir;
Param_Base_Type : Iir;
El : Iir;
Res : Iir;
begin
Res_Base_Type := Get_Base_Type (Res_Type);
if Param_Type = Null_Iir then
-- In case of error.
return Null_Iir;
end if;
Param_Base_Type := Get_Base_Type (Param_Type);
if Is_Overload_List (Conv) then
List := Get_Overload_List (Conv);
Res := Null_Iir;
for I in Natural loop
El := Get_Nth_Element (List, I);
exit when El = Null_Iir;
if Is_Valid_Conversion (El, Res_Base_Type, Param_Base_Type) then
if Res /= Null_Iir then
raise Internal_Error;
end if;
Free_Iir (Conv);
Res := El;
end if;
end loop;
else
if Is_Valid_Conversion (Conv, Res_Base_Type, Param_Base_Type) then
Res := Conv;
else
Res := Null_Iir;
Error_Msg_Sem ("conversion function or type does not match", Loc);
end if;
end if;
return Res;
end Extract_Conversion;
function Extract_In_Conversion (Conv : Iir;
Res_Type : Iir; Param_Type : Iir)
return Iir
is
Func : Iir;
begin
if Conv = Null_Iir then
return Null_Iir;
end if;
Func := Extract_Conversion (Conv, Res_Type, Param_Type, Conv);
if Func = Null_Iir then
return Null_Iir;
end if;
case Get_Kind (Func) is
when Iir_Kind_Function_Call
| Iir_Kind_Type_Conversion =>
return Func;
when others =>
Error_Kind ("extract_in_conversion", Func);
end case;
end Extract_In_Conversion;
function Extract_Out_Conversion (Conv : Iir;
Res_Type : Iir; Param_Type : Iir)
return Iir
is
Func : Iir;
Res : Iir;
begin
if Conv = Null_Iir then
return Null_Iir;
end if;
Func := Extract_Conversion (Get_Named_Entity (Conv),
Res_Type, Param_Type, Conv);
if Func = Null_Iir then
return Null_Iir;
end if;
case Get_Kind (Func) is
when Iir_Kinds_Function_Declaration =>
Res := Create_Iir (Iir_Kind_Function_Call);
Location_Copy (Res, Conv);
Set_Implementation (Res, Func);
Set_Base_Name (Res, Res);
Set_Parameter_Association_Chain (Res, Null_Iir);
Set_Type (Res, Get_Return_Type (Func));
Set_Expr_Staticness (Res, None);
Set_Use_Flag (Func, True);
when Iir_Kind_Subtype_Declaration
| Iir_Kind_Type_Declaration =>
Res := Create_Iir (Iir_Kind_Type_Conversion);
Location_Copy (Res, Conv);
Set_Type_Mark (Res, Func);
Set_Type (Res, Get_Type (Func));
Set_Expression (Res, Null_Iir);
Set_Expr_Staticness (Res, None);
when others =>
Error_Kind ("extract_out_conversion", Res);
end case;
Set_Named_Entity (Conv, Res);
Xrefs.Xref_Name (Conv);
return Res;
end Extract_Out_Conversion;
-- Associate ASSOC with interface INTERFACE
-- This sets RES.
procedure Sem_Association
(Assoc : Iir;
Inter : Iir;
Finish : Boolean;
Match : out Boolean)
is
Formal : Iir;
Formal_Type : Iir;
Actual: Iir;
Actual_Types : Iir;
Out_Conv, In_Conv : Iir;
Expr : Iir;
Res_Type : Iir;
Assoc_Kind : Param_Assoc_Type;
begin
Formal := Get_Formal (Assoc);
-- Handle open association.
if Get_Kind (Assoc) = Iir_Kind_Association_Element_Open then
if Formal /= Null_Iir then
Assoc_Kind := Sem_Formal (Formal, Inter);
if Assoc_Kind = None then
Match := False;
return;
end if;
Set_Whole_Association_Flag (Assoc, Assoc_Kind = Whole);
if Finish then
Set_Type (Formal, Null_Iir);
Sem_Name (Formal, False);
Expr := Get_Named_Entity (Formal);
if Get_Kind (Expr) = Iir_Kind_Error then
Match := False;
return;
end if;
Xrefs.Xref_Name (Formal);
Set_Formal (Assoc, Expr);
end if;
else
Set_Whole_Association_Flag (Assoc, True);
end if;
Match := True;
return;
end if;
-- Pre-semantize formal and extract out conversion.
if Formal /= Null_Iir then
Assoc_Kind := Sem_Formal (Formal, Inter);
if Assoc_Kind = None then
Match := False;
return;
end if;
Set_Whole_Association_Flag (Assoc, Assoc_Kind = Whole);
Formal := Get_Formal (Assoc);
Out_Conv := Get_Out_Conversion (Assoc);
else
Set_Whole_Association_Flag (Assoc, True);
Out_Conv := Null_Iir;
Formal := Inter;
end if;
Formal_Type := Get_Type (Formal);
-- Extract conversion from actual.
Actual := Get_Actual (Assoc);
Actual_Types := Get_Type (Actual);
In_Conv := Null_Iir;
if Actual_Types = Null_Iir then
Match := False;
return;
end if;
if Get_Kind (Inter) /= Iir_Kind_Constant_Interface_Declaration then
case Get_Kind (Actual) is
when Iir_Kind_Function_Call =>
Expr := Get_Parameter_Association_Chain (Actual);
if Is_Conversion_Function (Expr) then
In_Conv := Actual;
Actual := Get_Actual (Expr);
end if;
when Iir_Kind_Type_Conversion =>
if Flags.Vhdl_Std > Vhdl_87 then
In_Conv := Actual;
Actual := Get_Expression (Actual);
end if;
when others =>
null;
end case;
Actual_Types := Get_Type (Actual);
end if;
-- 4 cases: F:out_conv, G:in_conv.
-- A => B type of A = type of B
-- F(A) => B type of B = type of F
-- A => G(B) type of A = type of G
-- F(A) => G(B) type of B = type of F, type of A = type of G
if Out_Conv = Null_Iir and then In_Conv = Null_Iir then
Match := Compatibility_Types (Formal_Type, Actual_Types);
else
Match := True;
if In_Conv /= Null_Iir then
if not Compatibility_Types (Formal_Type, Get_Type (In_Conv)) then
Match := False;
end if;
end if;
if Out_Conv /= Null_Iir then
if not Compatibility_Types (Get_Type (Out_Conv), Actual_Types) then
Match := False;
end if;
end if;
end if;
if not Match then
if Finish then
Error_Msg_Sem
("can't associate " & Disp_Node (Actual) & " with "
& Disp_Node (Inter), Assoc);
Error_Msg_Sem
("(type of " & Disp_Node (Actual) & " is "
& Disp_Type_Of (Actual) & ")", Assoc);
Error_Msg_Sem
("(type of " & Disp_Node (Inter) & " is "
& Disp_Type_Of (Inter) & ")", Inter);
end if;
return;
end if;
if not Finish then
return;
end if;
if Out_Conv = Null_Iir and then In_Conv = Null_Iir then
Res_Type := Formal_Type;
else
if Out_Conv /= Null_Iir then
Res_Type := Search_Compatible_Type (Get_Type (Out_Conv),
Actual_Types);
else
Res_Type := Actual_Types;
end if;
if In_Conv /= Null_Iir then
In_Conv := Extract_In_Conversion (In_Conv, Formal_Type, Res_Type);
end if;
if Out_Conv /= Null_Iir then
Out_Conv := Extract_Out_Conversion (Out_Conv,
Res_Type, Formal_Type);
end if;
end if;
if Res_Type = Null_Iir then
-- In case of error, do not go farther.
Match := False;
return;
end if;
-- Semantize formal.
if Get_Formal (Assoc) /= Null_Iir then
Set_Type (Formal, Null_Iir);
Sem_Name (Formal, False);
Expr := Get_Named_Entity (Formal);
if Get_Kind (Expr) = Iir_Kind_Error then
return;
end if;
Xrefs.Xref_Name (Formal);
Free_Name (Formal);
Set_Formal (Assoc, Expr);
Formal_Type := Get_Type (Expr);
if Out_Conv = Null_Iir and In_Conv = Null_Iir then
Res_Type := Formal_Type;
end if;
end if;
Set_Out_Conversion (Assoc, Out_Conv);
Set_In_Conversion (Assoc, In_Conv);
Set_Actual (Assoc, Actual);
-- Semantize actual.
Expr := Sem_Expression (Actual, Res_Type);
if Expr /= Null_Iir then
Expr := Eval_Expr_If_Static (Expr);
Set_Actual (Assoc, Expr);
if In_Conv = Null_Iir and then Out_Conv = Null_Iir then
if not Check_Implicit_Conversion (Formal_Type, Expr) then
Error_Msg_Sem ("actual length does not match formal length",
Assoc);
end if;
end if;
end if;
end Sem_Association;
procedure Sem_Association_Chain
(Interface_Chain : Iir;
Assoc_Chain: in out Iir;
Finish: Boolean;
Missing : Missing_Type;
Loc : Iir;
Match : out Boolean)
is
-- Set POS and INTERFACE to *the* matching interface if any of ASSOC.
procedure Search_Interface (Assoc : Iir;
Inter : out Iir;
Pos : out Integer)
is
I_Match : Boolean;
begin
Inter := Interface_Chain;
Pos := 0;
while Inter /= Null_Iir loop
-- Formal assoc is not necessarily a simple name, it may
-- be a conversion function, or even an indexed or
-- selected name.
Sem_Association (Assoc, Inter, False, I_Match);
if I_Match then
return;
end if;
Inter := Get_Chain (Inter);
Pos := Pos + 1;
end loop;
end Search_Interface;
Assoc: Iir;
Inter: Iir;
type Bool_Array is array (Natural range <>) of Param_Assoc_Type;
Nbr_Arg: constant Natural := Get_Chain_Length (Interface_Chain);
Arg_Matched: Bool_Array (0 .. Nbr_Arg - 1) := (others => None);
Last_Individual : Iir;
Has_Individual : Boolean;
Pos : Integer;
Formal : Iir;
Interface_1 : Iir;
Pos_1 : Integer;
Assoc_1 : Iir;
begin
Match := True;
Has_Individual := False;
-- Loop on every assoc element, try to match it.
Inter := Interface_Chain;
Last_Individual := Null_Iir;
Pos := 0;
Assoc := Assoc_Chain;
while Assoc /= Null_Iir loop
Formal := Get_Formal (Assoc);
if Formal = Null_Iir then
-- Positional argument.
if Pos < 0 then
-- Positional after named argument. Already caught by
-- Sem_Actual_Of_Association_Chain (because it is called only
-- once, while sem_association_chain may be called several
-- times).
Match := False;
return;
end if;
-- Try to match actual of ASSOC with the interface.
if Inter = Null_Iir then
if Finish then
Error_Msg_Sem
("too many arguments for " & Disp_Node (Loc), Assoc);
end if;
Match := False;
return;
end if;
Sem_Association (Assoc, Inter, Finish, Match);
if not Match then
return;
end if;
if Get_Kind (Assoc) = Iir_Kind_Association_Element_Open then
Arg_Matched (Pos) := Open;
else
Arg_Matched (Pos) := Whole;
end if;
Set_Whole_Association_Flag (Assoc, True);
Inter := Get_Chain (Inter);
Pos := Pos + 1;
else
-- FIXME: directly search the formal if finish is true.
-- Find the Interface.
case Get_Kind (Formal) is
when Iir_Kind_Parenthesis_Name =>
Assoc_1 := Sem_Formal_Conversion (Assoc);
if Assoc_1 /= Null_Iir then
Search_Interface (Assoc_1, Interface_1, Pos_1);
-- LRM 4.3.2.2 Association Lists
-- The formal part of a named element association may be
-- in the form of a function call, [...], if and only
-- if the mode of the formal is OUT, INOUT, BUFFER, or
-- LINKAGE, and the actual is not OPEN.
if Interface_1 = Null_Iir
or else Get_Mode (Interface_1) = Iir_In_Mode
then
Sem_Name_Clean (Get_Out_Conversion (Assoc_1));
Free_Iir (Assoc_1);
Assoc_1 := Null_Iir;
end if;
end if;
Search_Interface (Assoc, Inter, Pos);
if Inter = Null_Iir then
if Assoc_1 /= Null_Iir then
Inter := Interface_1;
Pos := Pos_1;
Set_Formal (Assoc, Get_Formal (Assoc_1));
Set_Out_Conversion
(Assoc, Get_Out_Conversion (Assoc_1));
Set_Whole_Association_Flag
(Assoc, Get_Whole_Association_Flag (Assoc_1));
Free_Iir (Assoc_1);
end if;
else
if Assoc_1 /= Null_Iir then
raise Internal_Error;
end if;
end if;
when others =>
Search_Interface (Assoc, Inter, Pos);
end case;
if Inter /= Null_Iir then
if Get_Whole_Association_Flag (Assoc) then
-- Whole association.
Last_Individual := Null_Iir;
if Arg_Matched (Pos) = None then
if Get_Kind (Assoc) = Iir_Kind_Association_Element_Open
then
Arg_Matched (Pos) := Open;
else
Arg_Matched (Pos) := Whole;
end if;
else
if Finish then
Error_Msg_Sem
(Disp_Node (Inter) & " already associated", Assoc);
Match := False;
return;
end if;
end if;
else
-- Individual association.
Has_Individual := True;
if Arg_Matched (Pos) /= Whole then
if Finish
and then Arg_Matched (Pos) = Individual
and then Last_Individual /= Inter
then
Error_Msg_Sem
("non consecutive individual association for "
& Disp_Node (Inter), Assoc);
Match := False;
return;
end if;
Last_Individual := Inter;
Arg_Matched (Pos) := Individual;
else
if Finish then
Error_Msg_Sem
(Disp_Node (Inter) & " already associated", Assoc);
Match := False;
return;
end if;
end if;
end if;
if Finish then
Sem_Association (Assoc, Inter, True, Match);
-- MATCH can be false du to errors.
end if;
else
-- Not found.
if Finish then
-- FIXME: display the name of subprg or component/entity.
-- FIXME: fetch the interface (for parenthesis_name).
Error_Msg_Sem
("no interface for " & Disp_Node (Get_Formal (Assoc))
& " in association", Assoc);
end if;
Match := False;
return;
end if;
end if;
Assoc := Get_Chain (Assoc);
end loop;
if Finish and then Has_Individual then
Sem_Individual_Association (Assoc_Chain);
end if;
if Missing = Missing_Allowed then
return;
end if;
-- LRM 8.6 Procedure Call Statement
-- For each formal parameter of a procedure, a procedure call must
-- specify exactly one corresponding actual parameter.
-- This actual parameter is specified either explicitly, by an
-- association element (other than the actual OPEN) in the association
-- list, or in the absence of such an association element, by a default
-- expression (see Section 4.3.3.2).
-- LRM 7.3.3 Function Calls
-- For each formal parameter of a function, a function call must
-- specify exactly one corresponding actual parameter.
-- This actual parameter is specified either explicitly, by an
-- association element (other than the actual OPEN) in the association
-- list, or in the absence of such an association element, by a default
-- expression (see Section 4.3.3.2).
-- LRM 1.1.1.2
-- A port of mode IN may be unconnected or unassociated only if its
-- declaration includes a default expression.
-- It is an error if a port of any mode other than IN is unconnected
-- or unassociated and its type is an unconstrained array type.
Inter := Interface_Chain;
Pos := 0;
while Inter /= Null_Iir loop
if Arg_Matched (Pos) <= Open
and then Get_Default_Value (Inter) = Null_Iir
then
case Missing is
when Missing_Parameter
| Missing_Generic =>
if Finish then
Error_Msg_Sem ("no actual for " & Disp_Node (Inter), Loc);
end if;
Match := False;
return;
when Missing_Port =>
case Get_Mode (Inter) is
when Iir_In_Mode =>
if not Finish then
raise Internal_Error;
end if;
Error_Msg_Sem (Disp_Node (Inter)
& " of mode IN must be connected", Loc);
Match := False;
return;
when Iir_Out_Mode
| Iir_Linkage_Mode
| Iir_Inout_Mode
| Iir_Buffer_Mode =>
if not Finish then
raise Internal_Error;
end if;
if Is_Unconstrained_Type_Definition (Get_Type (Inter))
then
Error_Msg_Sem
("unconstrained " & Disp_Node (Inter)
& " must be connected", Loc);
Match := False;
return;
end if;
when Iir_Unknown_Mode =>
raise Internal_Error;
end case;
when Missing_Allowed =>
null;
end case;
end if;
Inter := Get_Chain (Inter);
Pos := Pos + 1;
end loop;
return;
end Sem_Association_Chain;
end Sem_Assocs;
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