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|
-- Package (and subprograms) instantiations
-- When a package is instantiated, we need to 'duplicate' its declaration.
-- This looks useless for analysis but it isn't: a type from a package
-- instantiated twice declares two different types. Without duplication, we
-- need to attach to each declaration its instance, which looks more expansive
-- that duplicating the declaration.
--
-- Furthermore, for generic type interface, it looks a good idea to duplicate
-- the body (macro expansion).
--
-- Duplicating is not trivial: internal links must be kept and external
-- links preserved. A table is used to map nodes from the uninstantiated
-- package to its duplicated node. Links from instantiated declaration to
-- the original declaration are also stored in that table.
with Tables;
with Vhdl.Nodes_Priv;
with Vhdl.Nodes_Meta;
with Types; use Types;
with Files_Map;
with Vhdl.Utils; use Vhdl.Utils;
with Vhdl.Errors; use Vhdl.Errors;
with Vhdl.Sem_Utils;
package body Vhdl.Sem_Inst is
-- Table of origin. This is an extension of vhdl nodes to track the
-- origin of a node. If a node has a non-null origin, then the node was
-- instantiated for the origin node.
--
-- Furthermore, during instantiation, we need to keep track of instantiated
-- nodes (ie nodes created by instantiation) used by references. As an
-- instance cannot be uninstantiated, there is no collisions, as soon as
-- such entries are cleaned after instantiation.
--
-- As an example, here are declarations of an uninstantiated package:
-- type Nat is range 0 to 1023;
-- constant N : Nat := 5;
-- A node Nat1 will be created from node Nat (an integer type definition).
-- The origin of Nat1 is Nat and this is true forever. During
-- instantiation, the instance of Nat is Nat1, so that the type of N will
-- be set to Nat1.
package Origin_Table is new Tables
(Table_Component_Type => Iir,
Table_Index_Type => Iir,
Table_Low_Bound => 2,
Table_Initial => 1024);
procedure Expand_Origin_Table
is
use Vhdl.Nodes_Priv;
Last : constant Iir := Nodes.Get_Last_Node;
El : constant Iir := Origin_Table.Last;
begin
if El < Last then
Origin_Table.Set_Last (Last);
Origin_Table.Table (El + 1 .. Last) := (others => Null_Iir);
end if;
end Expand_Origin_Table;
-- This is the public function; the table may not have been extended.
function Get_Origin (N : Iir) return Iir
is
-- Make the '<=' operator visible.
use Vhdl.Nodes_Priv;
begin
if N <= Origin_Table.Last then
return Origin_Table.Table (N);
else
return Null_Iir;
end if;
end Get_Origin;
-- This is the private function: the table *must* have been extended.
function Get_Instance (N : Iir) return Iir
is
-- Make '<=' operator visible for the assert.
use Vhdl.Nodes_Priv;
begin
pragma Assert (N <= Origin_Table.Last);
return Origin_Table.Table (N);
end Get_Instance;
procedure Set_Origin (N : Iir; Orig : Iir) is
begin
-- As nodes are created, we need to expand origin table.
Expand_Origin_Table;
pragma Assert (Orig = Null_Iir
or else Origin_Table.Table (N) = Null_Iir);
Origin_Table.Table (N) := Orig;
end Set_Origin;
type Instance_Entry_Type is record
-- Node
N : Iir;
-- Old value in Origin_Table.
Old_Origin : Iir;
end record;
type Instance_Index_Type is new Natural;
-- Table of previous values in Origin_Table. The first purpose of this
-- table is to be able to revert the calls to Set_Instance, so that a unit
-- can be instantiated several times. Keeping the nodes that have been
-- instantiated is cheaper than walking the tree a second time.
-- The second purpose of this table is to be able to have uninstantiated
-- packages in instantiated packages. In that case, the slot in
-- Origin_Table cannot be the origin and the instance at the same time and
-- has to be saved.
package Prev_Instance_Table is new Tables
(Table_Component_Type => Instance_Entry_Type,
Table_Index_Type => Instance_Index_Type,
Table_Low_Bound => 1,
Table_Initial => 256);
-- The instance of ORIG is now N. So during instantiation, a reference
-- to ORIG will be replaced by a reference to N. The previous instance
-- of ORIG is saved.
procedure Set_Instance (Orig : Iir; N : Iir)
is
use Vhdl.Nodes_Priv;
begin
pragma Assert (Orig <= Origin_Table.Last);
-- Save the old entry
Prev_Instance_Table.Append
(Instance_Entry_Type'(N => Orig,
Old_Origin => Origin_Table.Table (Orig)));
-- Set the entry.
Origin_Table.Table (Orig) := N;
end Set_Instance;
procedure Restore_Origin (Mark : Instance_Index_Type) is
begin
for I in reverse Mark + 1 .. Prev_Instance_Table.Last loop
declare
El : Instance_Entry_Type renames Prev_Instance_Table.Table (I);
begin
Origin_Table.Table (El.N) := El.Old_Origin;
end;
end loop;
Prev_Instance_Table.Set_Last (Mark);
end Restore_Origin;
-- The virtual file for the instance.
Instance_File : Source_File_Entry;
-- True if currently instantiated a shared generic.
Is_Within_Shared_Instance : Boolean := False;
-- Get the new location.
function Relocate (Loc : Location_Type) return Location_Type is
begin
if Instance_File /= No_Source_File_Entry then
-- For Instantiate.
return Files_Map.Instance_Relocate (Instance_File, Loc);
else
-- For Copy_Tree.
return Loc;
end if;
end Relocate;
-- Create a new Source_File for ORIG instantiated by INST.
procedure Create_Relocation (Inst : Iir; Orig : Iir)
is
use Files_Map;
Orig_File : Source_File_Entry;
Pos : Source_Ptr;
begin
Location_To_File_Pos (Get_Location (Orig), Orig_File, Pos);
Instance_File := Create_Instance_Source_File
(Orig_File, Get_Location (Inst), Inst);
end Create_Relocation;
function Instantiate_Iir (N : Iir; Is_Ref : Boolean) return Iir;
-- Instantiate a list. Simply create a new list and instantiate nodes of
-- that list.
function Instantiate_Iir_List (L : Iir_List; Is_Ref : Boolean)
return Iir_List
is
Res : Iir_List;
It : List_Iterator;
El : Iir;
begin
case L is
when Null_Iir_List
| Iir_List_All =>
return L;
when others =>
Res := Create_Iir_List;
It := List_Iterate (L);
while Is_Valid (It) loop
El := Get_Element (It);
Append_Element (Res, Instantiate_Iir (El, Is_Ref));
Next (It);
end loop;
return Res;
end case;
end Instantiate_Iir_List;
function Instantiate_Iir_Flist (L : Iir_Flist; Is_Ref : Boolean)
return Iir_Flist
is
Res : Iir_Flist;
El : Iir;
begin
case L is
when Null_Iir_Flist
| Iir_Flist_All
| Iir_Flist_Others =>
return L;
when others =>
Res := Create_Iir_Flist (Get_Nbr_Elements (L));
for I in Flist_First .. Flist_Last (L) loop
El := Get_Nth_Element (L, I);
Set_Nth_Element (Res, I, Instantiate_Iir (El, Is_Ref));
end loop;
return Res;
end case;
end Instantiate_Iir_Flist;
-- Instantiate a chain. This is a special case to reduce stack depth.
function Instantiate_Iir_Chain (N : Iir) return Iir
is
First : Iir;
Last : Iir;
Next_N : Iir;
Next_R : Iir;
begin
if N = Null_Iir then
return Null_Iir;
end if;
First := Instantiate_Iir (N, False);
Last := First;
Next_N := Get_Chain (N);
while Next_N /= Null_Iir loop
Next_R := Instantiate_Iir (Next_N, False);
Set_Chain (Last, Next_R);
Last := Next_R;
Next_N := Get_Chain (Next_N);
end loop;
return First;
end Instantiate_Iir_Chain;
procedure Instantiate_Iir_Field
(Res : Iir; N : Iir; F : Nodes_Meta.Fields_Enum)
is
use Nodes_Meta;
begin
case Get_Field_Type (F) is
when Type_Iir =>
declare
S : constant Iir := Get_Iir (N, F);
R : Iir;
begin
case Get_Field_Attribute (F) is
when Attr_None =>
R := Instantiate_Iir (S, False);
when Attr_Ref =>
R := Instantiate_Iir (S, True);
when Attr_Maybe_Ref =>
R := Instantiate_Iir (S, Get_Is_Ref (N));
when Attr_Forward_Ref =>
-- Must be explicitly handled in Instantiate_Iir, as it
-- requires special handling.
raise Internal_Error;
when Attr_Maybe_Forward_Ref =>
if Get_Is_Forward_Ref (N) then
-- Likewise: must be explicitly handled.
raise Internal_Error;
else
R := Instantiate_Iir (S, True);
end if;
when Attr_Chain =>
R := Instantiate_Iir_Chain (S);
when Attr_Chain_Next =>
R := Null_Iir;
when Attr_Of_Ref | Attr_Of_Maybe_Ref =>
-- Can only appear in list.
raise Internal_Error;
end case;
Set_Iir (Res, F, R);
end;
when Type_Iir_List =>
declare
S : constant Iir_List := Get_Iir_List (N, F);
R : Iir_List;
Ref : Boolean;
begin
case Get_Field_Attribute (F) is
when Attr_None =>
Ref := False;
when Attr_Of_Ref =>
Ref := True;
when Attr_Of_Maybe_Ref =>
Ref := Get_Is_Ref (N);
when others =>
-- Ref is specially handled in Instantiate_Iir.
-- Others cannot appear for lists.
raise Internal_Error;
end case;
R := Instantiate_Iir_List (S, Ref);
Set_Iir_List (Res, F, R);
end;
when Type_Iir_Flist =>
declare
S : constant Iir_Flist := Get_Iir_Flist (N, F);
R : Iir_Flist;
Ref : Boolean;
begin
case Get_Field_Attribute (F) is
when Attr_None =>
Ref := False;
when Attr_Of_Ref =>
Ref := True;
when Attr_Of_Maybe_Ref =>
Ref := Get_Is_Ref (N);
when others =>
-- Ref is specially handled in Instantiate_Iir.
-- Others cannot appear for lists.
raise Internal_Error;
end case;
R := Instantiate_Iir_Flist (S, Ref);
Set_Iir_Flist (Res, F, R);
end;
when Type_PSL_NFA
| Type_PSL_Node =>
-- TODO
raise Internal_Error;
when Type_String8_Id =>
Set_String8_Id (Res, F, Get_String8_Id (N, F));
when Type_Source_Ptr =>
Set_Source_Ptr (Res, F, Get_Source_Ptr (N, F));
when Type_Source_File_Entry =>
Set_Source_File_Entry (Res, F, Get_Source_File_Entry (N, F));
when Type_Date_Type
| Type_Date_State_Type
| Type_Time_Stamp_Id
| Type_File_Checksum_Id =>
-- Can this happen ?
raise Internal_Error;
when Type_Number_Base_Type =>
Set_Number_Base_Type (Res, F, Get_Number_Base_Type (N, F));
when Type_Iir_Constraint =>
Set_Iir_Constraint (Res, F, Get_Iir_Constraint (N, F));
when Type_Iir_Mode =>
Set_Iir_Mode (Res, F, Get_Iir_Mode (N, F));
when Type_Iir_Index32 =>
Set_Iir_Index32 (Res, F, Get_Iir_Index32 (N, F));
when Type_Int64 =>
Set_Int64 (Res, F, Get_Int64 (N, F));
when Type_Boolean =>
Set_Boolean (Res, F, Get_Boolean (N, F));
when Type_Iir_Staticness =>
Set_Iir_Staticness (Res, F, Get_Iir_Staticness (N, F));
when Type_Iir_All_Sensitized =>
Set_Iir_All_Sensitized (Res, F, Get_Iir_All_Sensitized (N, F));
when Type_Iir_Signal_Kind =>
Set_Iir_Signal_Kind (Res, F, Get_Iir_Signal_Kind (N, F));
when Type_Tri_State_Type =>
Set_Tri_State_Type (Res, F, Get_Tri_State_Type (N, F));
when Type_Iir_Pure_State =>
Set_Iir_Pure_State (Res, F, Get_Iir_Pure_State (N, F));
when Type_Iir_Delay_Mechanism =>
Set_Iir_Delay_Mechanism (Res, F, Get_Iir_Delay_Mechanism (N, F));
when Type_Iir_Force_Mode =>
Set_Iir_Force_Mode (Res, F, Get_Iir_Force_Mode (N, F));
when Type_Iir_Predefined_Functions =>
Set_Iir_Predefined_Functions
(Res, F, Get_Iir_Predefined_Functions (N, F));
when Type_Direction_Type =>
Set_Direction_Type (Res, F, Get_Direction_Type (N, F));
when Type_Iir_Int32 =>
Set_Iir_Int32 (Res, F, Get_Iir_Int32 (N, F));
when Type_Int32 =>
Set_Int32 (Res, F, Get_Int32 (N, F));
when Type_Fp64 =>
Set_Fp64 (Res, F, Get_Fp64 (N, F));
when Type_Token_Type =>
Set_Token_Type (Res, F, Get_Token_Type (N, F));
when Type_Scalar_Size =>
Set_Scalar_Size (Res, F, Get_Scalar_Size (N, F));
when Type_Name_Id =>
Set_Name_Id (Res, F, Get_Name_Id (N, F));
end case;
end Instantiate_Iir_Field;
-- Set designated_entity of attribute_value from attribute_value_chain
-- of RES.
procedure Instantiate_Attribute_Value_Chain (Res : Iir)
is
Val : Iir;
Ref_Ent : Iir;
begin
Val := Get_Attribute_Value_Chain (Res);
while Val /= Null_Iir loop
pragma Assert (Get_Designated_Entity (Val) = Null_Iir);
Ref_Ent := Get_Designated_Entity (Get_Origin (Val));
Ref_Ent := Instantiate_Iir (Ref_Ent, True);
Set_Designated_Entity (Val, Ref_Ent);
Val := Get_Value_Chain (Val);
end loop;
end Instantiate_Attribute_Value_Chain;
function Instantiate_Iir (N : Iir; Is_Ref : Boolean) return Iir
is
Res : Iir;
begin
-- Nothing to do for null node.
if N = Null_Iir then
return Null_Iir;
end if;
-- For a reference, do not create a new node.
if Is_Ref then
Res := Get_Instance (N);
if Res /= Null_Iir then
-- There is an instance for N.
return Res;
else
-- Reference outside the instance.
return N;
end if;
end if;
declare
use Nodes_Meta;
Kind : constant Iir_Kind := Get_Kind (N);
Fields : constant Fields_Array := Get_Fields (Kind);
F : Fields_Enum;
begin
-- In general, Get_Instance (N) is Null_Iir. There are two
-- exceptions:
-- - N is also an instance (instance within an uninstantiated
-- package). As instances and origin share the same table,
-- Get_Instance returns the origin. During instantiation, the old
-- value of Origin is saved so this case is correctly handled.
-- - N is shared, so it was already instantiated. This happends only
-- for interface_constant of implicit operators. In that case,
-- multiple instances are created for the same node, which is not
-- ideal. That's still ok (if no infos are attached to the
-- interface) and is the price to pay for this optimization.
-- Create a new node.
Res := Create_Iir (Kind);
-- The origin of this new node is N.
Set_Origin (Res, N);
-- And the instance of N is RES.
Set_Instance (N, Res);
Set_Location (Res, Relocate (Get_Location (N)));
for I in Fields'Range loop
F := Fields (I);
-- Fields that are handled specially.
case F is
when Field_Index_Subtype_List =>
-- Index_Subtype_List is always a reference, so retrieve
-- the instance of the referenced list. This is a special
-- case because there is no origins for list.
declare
List : Iir_Flist;
begin
case Kind is
when Iir_Kind_Array_Type_Definition =>
List := Get_Index_Subtype_Definition_List (Res);
when Iir_Kind_Array_Subtype_Definition =>
List := Get_Index_Constraint_List (Res);
if List = Null_Iir_Flist then
List := Get_Index_Subtype_List
(Get_Denoted_Type_Mark (Res));
end if;
when others =>
-- All the nodes where Index_Subtype_List appears
-- are handled above.
raise Internal_Error;
end case;
Set_Index_Subtype_List (Res, List);
end;
when Field_Simple_Aggregate_List =>
Set_Simple_Aggregate_List
(Res, Get_Simple_Aggregate_List (N));
when Field_Subprogram_Body =>
-- This is a forward reference. Not yet solved.
Set_Subprogram_Body (Res, Null_Iir);
when Field_Subprogram_Specification =>
-- Resolve it.
Instantiate_Iir_Field (Res, N, F);
-- Set body.
pragma Assert (Kind_In (Res, Iir_Kind_Procedure_Body,
Iir_Kind_Function_Body));
declare
Spec : constant Iir := Get_Subprogram_Specification (Res);
begin
pragma Assert (Get_Subprogram_Body (Spec) = Null_Iir);
Set_Subprogram_Body (Spec, Res);
end;
when Field_Incomplete_Type_Ref_Chain =>
if Get_Kind (Res) = Iir_Kind_Access_Type_Definition then
-- Link
declare
Def : constant Iir := Get_Named_Entity
(Get_Designated_Subtype_Indication (Res));
begin
if Get_Kind (Def) = Iir_Kind_Incomplete_Type_Definition
then
Set_Incomplete_Type_Ref_Chain
(Res, Get_Incomplete_Type_Ref_Chain (Def));
Set_Incomplete_Type_Ref_Chain (Def, Res);
end if;
end;
end if;
when Field_Designated_Type =>
null;
when Field_Designated_Subtype_Indication =>
Instantiate_Iir_Field (Res, N, F);
-- The designated type will be patched later if it is an
-- incomplete type definition
Set_Designated_Type
(Res, Get_Type (Get_Designated_Subtype_Indication (Res)));
when Field_Complete_Type_Definition =>
-- Will be set by the declaration of the complete type
null;
when Field_Incomplete_Type_Declaration =>
Instantiate_Iir_Field (Res, N, F);
declare
Res_Decl : constant Iir :=
Get_Incomplete_Type_Declaration (Res);
N_Decl : constant Iir :=
Get_Incomplete_Type_Declaration (N);
Res_Complete : Iir;
N_Def, Res_Def : Iir;
N_El, Next_N_El : Iir;
Res_El, Next_Res_El : Iir;
begin
if Is_Valid (N_Decl) then
-- N/RES completes a type declaration.
N_Def := Get_Type_Definition (N_Decl);
Res_Def := Get_Type_Definition (Res_Decl);
-- Set Complete_Type_Definition
Res_Complete := Get_Type (Res);
Set_Complete_Type_Definition (Res_Def, Res_Complete);
-- Rebuild the list and patch designated types
N_El := N_Def;
Res_El := Res_Def;
loop
Next_N_El := Get_Incomplete_Type_Ref_Chain (N_El);
exit when Is_Null (Next_N_El);
Next_Res_El := Get_Instance (Next_N_El);
Set_Designated_Type (Next_Res_El, Res_Complete);
Set_Incomplete_Type_Ref_Chain (Res_El, Next_Res_El);
N_El := Next_N_El;
end loop;
end if;
end;
when Field_Deferred_Declaration =>
if not Get_Deferred_Declaration_Flag (N)
and then Is_Valid (Get_Deferred_Declaration (N))
then
-- This is the completion.
declare
Incomplete_Decl_N : constant Iir :=
Get_Deferred_Declaration (N);
Incomplete_Decl_Res : constant Iir :=
Get_Instance (Incomplete_Decl_N);
begin
pragma Assert (Is_Valid (Incomplete_Decl_Res));
Set_Deferred_Declaration (Res, Incomplete_Decl_Res);
Set_Deferred_Declaration (Incomplete_Decl_Res, Res);
end;
end if;
when Field_Protected_Type_Body =>
null;
when Field_Protected_Type_Declaration =>
Instantiate_Iir_Field (Res, N, F);
Set_Protected_Type_Body
(Get_Protected_Type_Declaration (Res), Res);
when Field_Package_Body =>
null;
when Field_Package =>
Instantiate_Iir_Field (Res, N, F);
declare
Pkg : constant Iir := Get_Package (Res);
begin
-- The current node can be the body of a package; in that
-- case set the forward link.
-- Or it can be the body of an instantiated package; in
-- that case there is no forward link.
if Get_Kind (Pkg) = Iir_Kind_Package_Declaration then
Set_Package_Body (Get_Package (Res), Res);
end if;
end;
when Field_Instance_Package_Body =>
-- Do not instantiate the body of a package while
-- instantiating a shared package.
if not Is_Within_Shared_Instance then
Instantiate_Iir_Field (Res, N, F);
end if;
when Field_Subtype_Definition =>
-- TODO
null;
when Field_Instance_Source_File =>
Set_Instance_Source_File
(Res, Files_Map.Create_Instance_Source_File
(Get_Instance_Source_File (N),
Get_Location (Res), Res));
when Field_Generic_Chain
| Field_Declaration_Chain =>
if Kind = Iir_Kind_Package_Instantiation_Declaration then
declare
Prev_Instance_File : constant Source_File_Entry :=
Instance_File;
begin
-- Also relocate the instantiated declarations.
Instance_File := Get_Instance_Source_File (Res);
pragma Assert (Instance_File /= No_Source_File_Entry);
Instantiate_Iir_Field (Res, N, F);
Instance_File := Prev_Instance_File;
end;
else
Instantiate_Iir_Field (Res, N, F);
end if;
when Field_Designated_Entity =>
-- This is a field of attribute_value. It is a
-- forward_ref because it may reference a statement.
-- Handle it later.
null;
when Field_Attribute_Value_Chain =>
-- Chain of attribute_value for a scope parent. This is
-- a ref. As the field is declared after the declarations
-- and statements of the scope, the attribute_value have
-- been instantiated. So the reference can be resolved.
Instantiate_Iir_Field (Res, N, F);
-- However, the designated_entity of attribute_value have
-- not been resolved. As they are now instantiated, the
-- forward_ref links can be fixed.
Instantiate_Attribute_Value_Chain (Res);
when Field_Suspend_State_Chain =>
if Kind = Iir_Kind_Suspend_State_Declaration then
Set_Suspend_State_Chain (Res, Null_Node);
Set_Suspend_State_Last (Res, Null_Node);
else
declare
Decl : constant Node := Get_Suspend_State_Decl (Res);
Last : constant Node := Get_Suspend_State_Last (Decl);
begin
Set_Suspend_State_Chain (Res, Last);
Set_Suspend_State_Last (Decl, Res);
if Last = Null_Node then
Set_Suspend_State_Chain (Decl, Res);
end if;
end;
end if;
when Field_Suspend_State_Last =>
-- Already handled by Field_Suspend_State_Chain.
null;
when others =>
-- Common case.
Instantiate_Iir_Field (Res, N, F);
end case;
end loop;
-- TODO: other forward references:
-- incomplete constant
-- incomplete type
if Get_Kind (Res) in Iir_Kinds_Subprogram_Declaration then
-- Recompute the hash as the interface may have
-- changed due to instantiation.
Sem_Utils.Compute_Subprogram_Hash (Res);
end if;
return Res;
end;
end Instantiate_Iir;
-- As the scope generic interfaces extends beyond the immediate scope (see
-- LRM08 12.2 Scope of declarations), they must be instantiated.
function Instantiate_Generic_Chain
(Inst : Iir; Inters : Iir; In_Interface : Boolean) return Iir
is
Inter : Iir;
First : Iir;
Last : Iir;
Res : Iir;
begin
First := Null_Iir;
Last := Null_Iir;
Inter := Inters;
while Inter /= Null_Iir loop
-- Create a copy of the interface. FIXME: is it really needed ?
Res := Create_Iir (Get_Kind (Inter));
Set_Location (Res, Relocate (Get_Location (Inter)));
Set_Parent (Res, Inst);
Set_Identifier (Res, Get_Identifier (Inter));
Set_Visible_Flag (Res, Get_Visible_Flag (Inter));
Set_Origin (Res, Inter);
Set_Instance (Inter, Res);
case Get_Kind (Res) is
when Iir_Kind_Interface_Constant_Declaration =>
Set_Type (Res, Get_Type (Inter));
Set_Subtype_Indication (Res, Null_Iir); -- Not owner
Set_Mode (Res, Get_Mode (Inter));
Set_Has_Mode (Res, Get_Has_Mode (Inter));
Set_Has_Class (Res, Get_Has_Class (Inter));
Set_Has_Identifier_List (Res, Get_Has_Identifier_List (Inter));
Set_Expr_Staticness (Res, Get_Expr_Staticness (Inter));
Set_Name_Staticness (Res, Get_Name_Staticness (Inter));
Set_Default_Value (Res, Get_Default_Value (Inter));
Set_Is_Ref (Res, True);
when Iir_Kind_Interface_Package_Declaration =>
Set_Uninstantiated_Package_Decl
(Res, Get_Uninstantiated_Package_Decl (Inter));
if In_Interface then
-- Only set generics and declarations when instantiating
-- for an uninstantiated unit.
Set_Generic_Chain
(Res,
Instantiate_Generic_Chain
(Res, Get_Generic_Chain (Inter), True));
Set_Declaration_Chain
(Res,
Instantiate_Iir_Chain (Get_Declaration_Chain (Inter)));
end if;
when Iir_Kind_Interface_Type_Declaration =>
declare
Def : Iir;
begin
-- Also instantiate the interface type definition.
Def := Instantiate_Iir (Get_Type (Inter), False);
Set_Type (Res, Def);
Set_Interface_Type_Definition (Res, Def);
Set_Is_Ref (Res, True);
end;
when Iir_Kinds_Interface_Subprogram_Declaration =>
Sem_Utils.Compute_Subprogram_Hash (Res);
when others =>
Error_Kind ("instantiate_generic_chain", Res);
end case;
-- Append
if First = Null_Iir then
First := Res;
else
Set_Chain (Last, Res);
end if;
Last := Res;
Inter := Get_Chain (Inter);
end loop;
return First;
end Instantiate_Generic_Chain;
procedure Set_Instance_On_Chain (Chain : Iir; Inst_Chain : Iir);
procedure Set_Instance_On_Iir_List (N : Iir_List; Inst : Iir_List);
procedure Set_Instance_On_Iir_Flist (N : Iir_Flist; Inst : Iir_Flist);
procedure Set_Instance_On_Iir (N : Iir; Inst : Iir) is
begin
if N = Null_Iir then
pragma Assert (Inst = Null_Iir);
return;
end if;
pragma Assert (Inst /= Null_Iir);
declare
use Nodes_Meta;
Kind : constant Iir_Kind := Get_Kind (N);
Fields : constant Fields_Array := Get_Fields (Kind);
F : Fields_Enum;
begin
pragma Assert (Get_Kind (Inst) = Kind);
if Kind = Iir_Kind_Interface_Constant_Declaration
and then Get_Identifier (N) = Null_Identifier
then
-- Anonymous constant interface declarations are the only nodes
-- that can be shared. Handle that very special case.
return;
end if;
-- pragma Assert (Get_Instance (N) = Null_Iir);
Set_Instance (N, Inst);
if Kind = Iir_Kind_Interface_Package_Declaration then
-- For interface package, this is not symetric.
-- The nodes to set instance on are in the interface package,
-- while the instances are in the associated package.
declare
Pkg_Actual : constant Iir := Get_Associated_Package (Inst);
begin
Set_Instance_On_Chain (Get_Generic_Chain (N),
Get_Generic_Chain (Pkg_Actual));
Set_Instance_On_Chain (Get_Declaration_Chain (N),
Get_Declaration_Chain (Pkg_Actual));
Set_Instance_On_Chain (Get_Attribute_Value_Chain (N),
Get_Attribute_Value_Chain (Pkg_Actual));
end;
return;
end if;
for I in Fields'Range loop
F := Fields (I);
case Get_Field_Type (F) is
when Type_Iir =>
declare
S : constant Iir := Get_Iir (N, F);
S_Inst : constant Iir := Get_Iir (Inst, F);
begin
case Get_Field_Attribute (F) is
when Attr_None =>
Set_Instance_On_Iir (S, S_Inst);
when Attr_Ref
| Attr_Forward_Ref
| Attr_Maybe_Forward_Ref =>
null;
when Attr_Maybe_Ref =>
if not Get_Is_Ref (N) then
Set_Instance_On_Iir (S, S_Inst);
end if;
when Attr_Chain =>
Set_Instance_On_Chain (S, S_Inst);
when Attr_Chain_Next =>
null;
when Attr_Of_Ref | Attr_Of_Maybe_Ref =>
-- Can only appear in list.
raise Internal_Error;
end case;
end;
when Type_Iir_List =>
declare
S : constant Iir_List := Get_Iir_List (N, F);
S_Inst : constant Iir_List := Get_Iir_List (Inst, F);
begin
case Get_Field_Attribute (F) is
when Attr_None =>
Set_Instance_On_Iir_List (S, S_Inst);
when Attr_Of_Maybe_Ref =>
if not Get_Is_Ref (N) then
Set_Instance_On_Iir_List (S, S_Inst);
end if;
when Attr_Of_Ref
| Attr_Ref
| Attr_Forward_Ref =>
null;
when others =>
-- Ref is specially handled in Instantiate_Iir.
-- Others cannot appear for lists.
raise Internal_Error;
end case;
end;
when Type_Iir_Flist =>
declare
S : constant Iir_Flist := Get_Iir_Flist (N, F);
S_Inst : constant Iir_Flist := Get_Iir_Flist (Inst, F);
begin
case Get_Field_Attribute (F) is
when Attr_None =>
Set_Instance_On_Iir_Flist (S, S_Inst);
when Attr_Of_Maybe_Ref =>
if not Get_Is_Ref (N) then
Set_Instance_On_Iir_Flist (S, S_Inst);
end if;
when Attr_Of_Ref
| Attr_Ref
| Attr_Forward_Ref =>
null;
when others =>
-- Ref is specially handled in Instantiate_Iir.
-- Others cannot appear for lists.
raise Internal_Error;
end case;
end;
when others =>
null;
end case;
end loop;
end;
end Set_Instance_On_Iir;
procedure Set_Instance_On_Iir_List (N : Iir_List; Inst : Iir_List)
is
El : Iir;
El_Inst : Iir;
It, It_Inst : List_Iterator;
begin
case N is
when Null_Iir_List
| Iir_List_All =>
pragma Assert (Inst = N);
return;
when others =>
It := List_Iterate (N);
It_Inst := List_Iterate (Inst);
while Is_Valid (It) loop
pragma Assert (Is_Valid (It_Inst));
El := Get_Element (It);
El_Inst := Get_Element (It_Inst);
Set_Instance_On_Iir (El, El_Inst);
Next (It);
Next (It_Inst);
end loop;
pragma Assert (not Is_Valid (It_Inst));
end case;
end Set_Instance_On_Iir_List;
procedure Set_Instance_On_Iir_Flist (N : Iir_Flist; Inst : Iir_Flist)
is
El : Iir;
El_Inst : Iir;
begin
case N is
when Null_Iir_Flist
| Iir_Flist_All
| Iir_Flist_Others =>
pragma Assert (Inst = N);
return;
when others =>
pragma Assert (Get_Nbr_Elements (N) = Get_Nbr_Elements (Inst));
for I in Flist_First .. Flist_Last (N) loop
El := Get_Nth_Element (N, I);
El_Inst := Get_Nth_Element (Inst, I);
Set_Instance_On_Iir (El, El_Inst);
end loop;
end case;
end Set_Instance_On_Iir_Flist;
procedure Set_Instance_On_Chain (Chain : Iir; Inst_Chain : Iir)
is
El : Iir;
Inst_El : Iir;
begin
El := Chain;
Inst_El := Inst_Chain;
while El /= Null_Iir loop
pragma Assert (Inst_El /= Null_Iir);
Set_Instance_On_Iir (El, Inst_El);
El := Get_Chain (El);
Inst_El := Get_Chain (Inst_El);
end loop;
pragma Assert (Inst_El = Null_Iir);
end Set_Instance_On_Chain;
-- In ASSOC (which is the association for interface INTER), adjust
-- references to the instance.
-- INTER is the interface of the uninstantiated unit.
procedure Instantiate_Generic_Map (Assoc : Iir; Inter: Iir)
is
Assoc_Formal : Iir;
begin
-- Replace formal reference to the instance.
-- Cf Get_association_Interface
declare
Formal : Iir;
begin
Formal := Get_Formal (Assoc);
if Is_Valid (Formal) then
loop
case Get_Kind (Formal) is
when Iir_Kind_Simple_Name
| Iir_Kind_Operator_Symbol
| Iir_Kind_Reference_Name =>
Set_Named_Entity
(Formal, Get_Instance (Get_Named_Entity (Formal)));
exit;
when Iir_Kind_Slice_Name
| Iir_Kind_Indexed_Name
| Iir_Kind_Selected_Element =>
Formal := Get_Prefix (Formal);
when others =>
Error_Kind ("instantiate_generic_map", Formal);
end case;
end loop;
end if;
end;
Assoc_Formal := Get_Association_Interface (Assoc, Inter);
case Get_Kind (Inter) is
when Iir_Kind_Interface_Constant_Declaration =>
-- If the type of the formal is an interface type also
-- associated by this map, change the type of the formal
-- to the associated type.
declare
Formal_Type : Iir;
Formal_Orig : Iir;
begin
if Assoc_Formal = Null_Iir then
return;
end if;
Formal_Type := Get_Type (Assoc_Formal);
if Get_Kind (Formal_Type) = Iir_Kind_Interface_Type_Definition
then
-- Type of the formal is an interface type.
-- Check if the interface type was declared in the same
-- interface list: must have the same parent.
Formal_Orig := Get_Origin (Assoc_Formal);
if Get_Parent (Get_Type_Declarator (Formal_Type))
= Get_Parent (Formal_Orig)
then
Set_Type (Assoc_Formal, Get_Instance (Formal_Type));
end if;
end if;
end;
when Iir_Kind_Interface_Package_Declaration =>
-- INTER is an instantiation, without generic nor declaration
-- chains.
pragma Assert
(Get_Kind (Assoc) = Iir_Kind_Association_Element_Package);
declare
Sub_Inst : constant Iir :=
Get_Named_Entity (Get_Actual (Assoc));
Pkg_Inter : constant Iir := Get_Origin (Assoc_Formal);
begin
-- Replace references of interface package to references
-- to the actual package.
Set_Instance (Pkg_Inter, Sub_Inst);
Set_Associated_Package (Assoc_Formal, Sub_Inst);
Set_Instance_On_Chain (Get_Generic_Chain (Pkg_Inter),
Get_Generic_Chain (Sub_Inst));
Set_Instance_On_Chain (Get_Declaration_Chain (Pkg_Inter),
Get_Declaration_Chain (Sub_Inst));
end;
when Iir_Kind_Interface_Type_Declaration =>
pragma Assert
(Get_Kind (Assoc) = Iir_Kind_Association_Element_Type);
-- Replace the incomplete interface type by the actual subtype
-- indication.
declare
Orig_Formal : constant Iir := Get_Origin (Assoc_Formal);
Inter_Type_Def : constant Iir := Get_Type (Orig_Formal);
Actual_Type : constant Iir := Get_Actual_Type (Assoc);
begin
Set_Instance (Inter_Type_Def, Actual_Type);
end;
when Iir_Kinds_Interface_Subprogram_Declaration =>
if Get_Kind (Assoc) = Iir_Kind_Association_Element_Open then
Set_Instance (Get_Origin (Assoc_Formal),
Get_Open_Actual (Assoc));
else
pragma Assert
(Get_Kind (Assoc) = Iir_Kind_Association_Element_Subprogram);
-- Replace the interface subprogram by the subprogram.
declare
Actual_Subprg : constant Iir :=
Get_Named_Entity (Get_Actual (Assoc));
begin
Set_Instance (Get_Origin (Assoc_Formal), Actual_Subprg);
-- Also set the associated subprogram to the interface
-- subprogram, so that it can referenced through its name.
Set_Associated_Subprogram (Assoc_Formal, Actual_Subprg);
end;
end if;
when Iir_Kind_Error =>
null;
when others =>
Error_Kind ("instantiate_generic_map", Assoc);
end case;
end Instantiate_Generic_Map;
procedure Instantiate_Generic_Map_Chain (Inst : Iir; Pkg : Iir)
is
pragma Unreferenced (Pkg);
Assoc, Inter : Iir;
Inter_Iter : Iir;
begin
Assoc := Get_Generic_Map_Aspect_Chain (Inst);
Inter_Iter := Get_Generic_Chain (Inst);
while Is_Valid (Assoc) loop
Inter := Get_Association_Interface (Assoc, Inter_Iter);
Instantiate_Generic_Map (Assoc, Inter);
Next_Association_Interface (Assoc, Inter_Iter);
end loop;
end Instantiate_Generic_Map_Chain;
function Copy_Tree (Orig : Iir) return Iir
is
Prev_Instance_File : constant Source_File_Entry := Instance_File;
Mark : constant Instance_Index_Type := Prev_Instance_Table.Last;
Res : Iir;
begin
Instance_File := No_Source_File_Entry;
-- Be sure Get_Origin_Priv can be called on existing nodes.
Expand_Origin_Table;
Res := Instantiate_Iir (Orig, False);
Instance_File := Prev_Instance_File;
Restore_Origin (Mark);
return Res;
end Copy_Tree;
procedure Instantiate_Subprogram_Declaration (Inst : Iir; Subprg : Iir)
is
Prev_Instance_File : constant Source_File_Entry := Instance_File;
Mark : constant Instance_Index_Type := Prev_Instance_Table.Last;
begin
Create_Relocation (Inst, Subprg);
Set_Instance_Source_File (Inst, Instance_File);
-- Be sure Get_Origin_Priv can be called on existing nodes.
Expand_Origin_Table;
-- For Parent: the instance of PKG is INST.
Set_Origin (Subprg, Inst);
-- Manually instantiate the package declaration.
Set_Generic_Chain
(Inst,
Instantiate_Generic_Chain (Inst, Get_Generic_Chain (Subprg), True));
Instantiate_Generic_Map_Chain (Inst, Subprg);
if Get_Kind (Subprg) = Iir_Kind_Function_Instantiation_Declaration then
Set_Return_Type (Inst, Instantiate_Iir (Subprg, True));
end if;
Set_Interface_Declaration_Chain
(Inst,
Instantiate_Iir_Chain (Get_Interface_Declaration_Chain (Subprg)));
Set_Origin (Subprg, Null_Iir);
Instance_File := Prev_Instance_File;
Restore_Origin (Mark);
end Instantiate_Subprogram_Declaration;
procedure Instantiate_Package (Inter : Iir; Pkg : Iir; Is_Inter : Boolean)
is
Header : constant Iir := Get_Package_Header (Pkg);
Prev_Instance_File : constant Source_File_Entry := Instance_File;
Mark : constant Instance_Index_Type := Prev_Instance_Table.Last;
Prev_Within_Shared_Instance : constant Boolean :=
Is_Within_Shared_Instance;
begin
Create_Relocation (Inter, Pkg);
Set_Instance_Source_File (Inter, Instance_File);
-- Be sure Get_Origin_Priv can be called on existing nodes.
Expand_Origin_Table;
-- For Parent: the instance of PKG is INST.
Set_Origin (Pkg, Inter);
Is_Within_Shared_Instance := not Get_Macro_Expanded_Flag (Pkg);
-- Manually instantiate the package declaration.
Set_Generic_Chain (Inter,
Instantiate_Generic_Chain
(Inter, Get_Generic_Chain (Header), Is_Inter));
Instantiate_Generic_Map_Chain (Inter, Pkg);
Set_Declaration_Chain
(Inter, Instantiate_Iir_Chain (Get_Declaration_Chain (Pkg)));
Set_Attribute_Value_Chain
(Inter, Instantiate_Iir (Get_Attribute_Value_Chain (Pkg), True));
Instantiate_Attribute_Value_Chain (Inter);
Set_Origin (Pkg, Null_Iir);
Instance_File := Prev_Instance_File;
Restore_Origin (Mark);
Is_Within_Shared_Instance := Prev_Within_Shared_Instance;
end Instantiate_Package;
procedure Instantiate_Interface_Package_Declaration
(Inter : Iir; Pkg : Iir) is
begin
Instantiate_Package (Inter, Pkg, True);
end Instantiate_Interface_Package_Declaration;
procedure Instantiate_Package_Declaration (Inst : Iir; Pkg : Iir) is
begin
Instantiate_Package (Inst, Pkg, False);
end Instantiate_Package_Declaration;
function Instantiate_Package_Body (Inst : Iir) return Iir
is
Pkg : constant Iir := Get_Uninstantiated_Package_Decl (Inst);
Prev_Instance_File : constant Source_File_Entry := Instance_File;
Mark : constant Instance_Index_Type := Prev_Instance_Table.Last;
Res : Iir;
begin
Create_Relocation (Inst, Pkg);
-- Be sure Get_Origin_Priv can be called on existing nodes.
Expand_Origin_Table;
-- References to package specification (and its declarations) will
-- be redirected to the package instantiation.
Set_Instance (Pkg, Inst);
declare
Pkg_Hdr : constant Iir := Get_Package_Header (Pkg);
Pkg_El : Iir;
Inst_El : Iir;
Inter_El : Iir;
Inter : Iir;
begin
-- In the body, references to interface object are redirected to the
-- instantiated interface objects.
Pkg_El := Get_Generic_Chain (Pkg_Hdr);
Inst_El := Get_Generic_Chain (Inst);
while Is_Valid (Pkg_El) loop
if Get_Kind (Pkg_El) in Iir_Kinds_Interface_Object_Declaration then
Set_Instance (Pkg_El, Inst_El);
end if;
Pkg_El := Get_Chain (Pkg_El);
Inst_El := Get_Chain (Inst_El);
end loop;
-- In the body, references to interface type are substitued to the
-- mapped type.
Inst_El := Get_Generic_Map_Aspect_Chain (Inst);
Inter_El := Get_Generic_Chain (Inst);
while Is_Valid (Inst_El) loop
case Get_Kind (Inter_El) is
when Iir_Kind_Interface_Type_Declaration =>
Inter := Get_Association_Interface (Inst_El, Inter_El);
Set_Instance (Get_Type (Get_Origin (Inter)),
Get_Actual_Type (Inst_El));
-- Implicit operators.
declare
Imp_Inter : Iir;
Imp_Assoc : Iir;
begin
Imp_Assoc := Get_Subprogram_Association_Chain (Inst_El);
Imp_Inter := Get_Interface_Type_Subprograms
(Get_Origin (Inter));
while Is_Valid (Imp_Inter) and Is_Valid (Imp_Assoc) loop
Set_Instance
(Imp_Inter,
Get_Named_Entity (Get_Actual (Imp_Assoc)));
Imp_Inter := Get_Chain (Imp_Inter);
Imp_Assoc := Get_Chain (Imp_Assoc);
end loop;
end;
when Iir_Kinds_Interface_Subprogram_Declaration =>
Inter := Get_Association_Interface (Inst_El, Inter_El);
if Get_Kind (Inst_El) = Iir_Kind_Association_Element_Open
then
Set_Instance (Get_Origin (Inter),
Get_Open_Actual (Inst_El));
else
Set_Instance (Get_Origin (Inter),
Get_Named_Entity (Get_Actual (Inst_El)));
end if;
when Iir_Kind_Interface_Constant_Declaration =>
null;
when others =>
-- TODO.
raise Internal_Error;
end case;
Next_Association_Interface (Inst_El, Inter_El);
end loop;
end;
Set_Instance_On_Chain
(Get_Declaration_Chain (Pkg), Get_Declaration_Chain (Inst));
-- Instantiate the body.
Res := Instantiate_Iir (Get_Package_Body (Pkg), False);
Set_Identifier (Res, Get_Identifier (Inst));
-- Restore.
Instance_File := Prev_Instance_File;
Restore_Origin (Mark);
return Res;
end Instantiate_Package_Body;
function Instantiate_Component_Declaration (Comp : Iir; Map : Iir)
return Iir
is
Prev_Instance_File : constant Source_File_Entry := Instance_File;
Mark : constant Instance_Index_Type := Prev_Instance_Table.Last;
Prev_Orig : Iir;
Inst : Iir;
begin
-- Create the component/entity.
Inst := Create_Iir (Get_Kind (Comp));
-- Build and set the new location.
Create_Relocation (Map, Comp);
Set_Location (Inst, Relocate (Get_Location (Comp)));
-- Be sure Get_Origin_Priv can be called on existing nodes.
Expand_Origin_Table;
-- For Parent: the instance of PKG is INST.
Prev_Orig := Get_Origin (Comp);
Set_Origin (Comp, Inst);
-- Instantiate generics
Set_Generic_Chain
(Inst,
Instantiate_Generic_Chain (Inst, Get_Generic_Chain (Comp), True));
declare
Assoc, Inter, Inter_Iter : Iir;
begin
Assoc := Get_Generic_Map_Aspect_Chain (Map);
Inter_Iter := Get_Generic_Chain (Inst);
while Is_Valid (Assoc) loop
Inter := Get_Association_Interface (Assoc, Inter_Iter);
Instantiate_Generic_Map (Assoc, Inter);
Next_Association_Interface (Assoc, Inter_Iter);
end loop;
end;
Set_Port_Chain
(Inst, Instantiate_Iir_Chain (Get_Port_Chain (Comp)));
Set_Origin (Comp, Prev_Orig);
Instance_File := Prev_Instance_File;
Restore_Origin (Mark);
return Inst;
end Instantiate_Component_Declaration;
procedure Substitute_On_Iir_List (L : Iir_List; E : Iir; Rep : Iir);
procedure Substitute_On_Iir (N : Iir; E : Iir; Rep : Iir) is
begin
if N = Null_Iir then
return;
end if;
pragma Assert (N /= E);
declare
use Nodes_Meta;
Kind : constant Iir_Kind := Get_Kind (N);
Fields : constant Fields_Array := Get_Fields (Kind);
F : Fields_Enum;
begin
for I in Fields'Range loop
F := Fields (I);
case Get_Field_Type (F) is
when Type_Iir =>
declare
S : constant Iir := Get_Iir (N, F);
begin
if F = Field_Interface_Type_Definition then
-- Do not substitute this Interface_Type_Definition,
-- it is only to own the type definition in the
-- uninstantiated interface.
null;
elsif S = E then
-- Substitute
Set_Iir (N, F, Rep);
pragma Assert (Get_Field_Attribute (F) = Attr_Ref);
else
case Get_Field_Attribute (F) is
when Attr_None =>
Substitute_On_Iir (S, E, Rep);
when Attr_Ref
| Attr_Forward_Ref
| Attr_Maybe_Forward_Ref =>
null;
when Attr_Maybe_Ref =>
if not Get_Is_Ref (N) then
Substitute_On_Iir (S, E, Rep);
end if;
when Attr_Chain =>
Substitute_On_Chain (S, E, Rep);
when Attr_Chain_Next =>
null;
when Attr_Of_Ref | Attr_Of_Maybe_Ref =>
-- Can only appear in list.
raise Internal_Error;
end case;
end if;
end;
when Type_Iir_List =>
declare
S : constant Iir_List := Get_Iir_List (N, F);
begin
case Get_Field_Attribute (F) is
when Attr_None =>
Substitute_On_Iir_List (S, E, Rep);
when Attr_Of_Maybe_Ref =>
if not Get_Is_Ref (N) then
Substitute_On_Iir_List (S, E, Rep);
end if;
when Attr_Of_Ref
| Attr_Ref
| Attr_Forward_Ref =>
null;
when others =>
-- Ref is specially handled in Instantiate_Iir.
-- Others cannot appear for lists.
raise Internal_Error;
end case;
end;
when others =>
null;
end case;
end loop;
end;
end Substitute_On_Iir;
procedure Substitute_On_Iir_List (L : Iir_List; E : Iir; Rep : Iir)
is
It : List_Iterator;
begin
case L is
when Null_Iir_List
| Iir_List_All =>
return;
when others =>
It := List_Iterate (L);
while Is_Valid (It) loop
Substitute_On_Iir (Get_Element (It), E, Rep);
Next (It);
end loop;
end case;
end Substitute_On_Iir_List;
procedure Substitute_On_Chain (Chain : Iir; E : Iir; Rep : Iir)
is
El : Iir;
begin
El := Chain;
while Is_Valid (El) loop
Substitute_On_Iir (El, E, Rep);
El := Get_Chain (El);
end loop;
end Substitute_On_Chain;
function Get_Subprogram_Body_Origin (Spec : Iir) return Iir
is
Res : constant Iir := Get_Subprogram_Body (Spec);
Orig : Iir;
begin
if Res /= Null_Iir then
return Res;
else
Orig := Get_Origin (Spec);
pragma Assert (Orig /= Null_Iir);
return Get_Subprogram_Body_Origin (Orig);
end if;
end Get_Subprogram_Body_Origin;
end Vhdl.Sem_Inst;
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