exp_disp.adb (Make_DT, [...]): Set attribute Is_Static_Dispatch_Table

2008-03-26  Javier Miranda  <miranda@adacore.com>

	* exp_disp.adb (Make_DT, Make_Secondary_DT): Set attribute
	Is_Static_Dispatch_Table
	(Build_Dispatch_Tables): Replace calls to Exchange_Entities() by calls
	to Exchange_Declarations to exchange the private and full-view. Bug
	found working in this issue.
	(Expand_Dispatching_Call): Propagate the convention of the subprogram
	to the subprogram pointer type.
	(Make_Secondary_DT): Replace generation of Prim'Address by
	Address (Prim'Unrestricted_Access)
	(Make_DT): Replace generation of Prim'Address by
	Address (Prim'Unrestricted_Access)
	(Make_Disp_*_Bodies): When compiling for a restricted profile, use
	simple call form for single entry.
	(Make_DT): Handle new contents of Access_Disp_Table (access to dispatch
	tables of predefined primitives).
	(Make_Secondary_DT): Add support to handle access to dispatch tables of
	predefined primitives.
	(Make_Tags): Add entities to Access_Dispatch_Table associated with
	access to dispatch tables containing predefined primitives.

	* exp_ch6.adb (N_Pragma): Chars field removed, use Chars
	(Pragma_Identifier (..  instead, adjustments throughout to accomodate
	this change.
	(Register_Predefined_DT_Entry): Updated to handle the new contents
	of attribute Access_Disp_Table (pointers to dispatch tables containing
	predefined primitives).

	* exp_util.ads, exp_util.adb (Corresponding_Runtime_Package): New
	subprogram.
	(Find_Interface_ADT): Updated to skip the new contents of attribute
	Access_Dispatch_Table (pointers to dispatch tables containing predefined
	primitives).

	* sem_util.adb (Has_Abstract_Interfaces): Add missing support for
	concurrent types.
	(Set_Convention): Use new function Is_Access_Subprogram_Type
	(Collect_Interfaces_Info): Updated to skip the new contents of attribute
	Access_Dispatch_Table (pointers to dispatch tables containing predefined
	primitives).

	* exp_atag.ads, exp_atag.adb (Build_Inherit_Predefined_Prims): Improve
	expanded code avoiding calls to Build_Predef_Prims.
	(Build_Set_Predefined_Prim_Op_Address): Improve expanded code avoiding
	call to Build_Get_Predefined_Prim_Op_Address.

From-SVN: r133564
This commit is contained in:
Javier Miranda 2008-03-26 08:39:17 +01:00 committed by Arnaud Charlet
parent 50cff36721
commit 1923d2d671
7 changed files with 846 additions and 421 deletions

View File

@ -369,64 +369,32 @@ package body Exp_Atag is
New_Tag_Node : Node_Id) return Node_Id
is
begin
if RTE_Available (RE_DT) then
return
Make_Assignment_Statement (Loc,
Name =>
Make_Slice (Loc,
Prefix =>
Make_Explicit_Dereference (Loc,
Unchecked_Convert_To (RTE (RE_Predef_Prims_Table_Ptr),
Make_Selected_Component (Loc,
Prefix =>
Build_DT (Loc, New_Tag_Node),
Selector_Name =>
New_Reference_To
(RTE_Record_Component (RE_Predef_Prims), Loc)))),
Discrete_Range => Make_Range (Loc,
Make_Integer_Literal (Loc, Uint_1),
New_Reference_To (RTE (RE_Max_Predef_Prims), Loc))),
return
Make_Assignment_Statement (Loc,
Name =>
Make_Slice (Loc,
Prefix =>
Make_Explicit_Dereference (Loc,
Unchecked_Convert_To (RTE (RE_Predef_Prims_Table_Ptr),
Make_Explicit_Dereference (Loc,
Unchecked_Convert_To (RTE (RE_Addr_Ptr),
New_Tag_Node)))),
Discrete_Range => Make_Range (Loc,
Make_Integer_Literal (Loc, Uint_1),
New_Reference_To (RTE (RE_Max_Predef_Prims), Loc))),
Expression =>
Make_Slice (Loc,
Prefix =>
Make_Explicit_Dereference (Loc,
Unchecked_Convert_To (RTE (RE_Predef_Prims_Table_Ptr),
Make_Selected_Component (Loc,
Prefix =>
Build_DT (Loc, Old_Tag_Node),
Selector_Name =>
New_Reference_To
(RTE_Record_Component (RE_Predef_Prims), Loc)))),
Discrete_Range =>
Make_Range (Loc,
Low_Bound => Make_Integer_Literal (Loc, 1),
High_Bound =>
New_Reference_To (RTE (RE_Max_Predef_Prims), Loc))));
else
return
Make_Assignment_Statement (Loc,
Name =>
Make_Slice (Loc,
Prefix =>
Make_Explicit_Dereference (Loc,
Build_Predef_Prims (Loc, New_Tag_Node)),
Discrete_Range => Make_Range (Loc,
Make_Integer_Literal (Loc, Uint_1),
New_Reference_To (RTE (RE_Max_Predef_Prims), Loc))),
Expression =>
Make_Slice (Loc,
Prefix =>
Make_Explicit_Dereference (Loc,
Build_Predef_Prims (Loc, Old_Tag_Node)),
Discrete_Range =>
Make_Range (Loc,
Low_Bound => Make_Integer_Literal (Loc, 1),
High_Bound =>
New_Reference_To (RTE (RE_Max_Predef_Prims), Loc))));
end if;
Expression =>
Make_Slice (Loc,
Prefix =>
Make_Explicit_Dereference (Loc,
Unchecked_Convert_To (RTE (RE_Predef_Prims_Table_Ptr),
Make_Explicit_Dereference (Loc,
Unchecked_Convert_To (RTE (RE_Addr_Ptr),
Old_Tag_Node)))),
Discrete_Range =>
Make_Range (Loc,
Make_Integer_Literal (Loc, 1),
New_Reference_To (RTE (RE_Max_Predef_Prims), Loc))));
end Build_Inherit_Predefined_Prims;
------------------------
@ -472,8 +440,15 @@ package body Exp_Atag is
begin
return
Make_Assignment_Statement (Loc,
Name => Build_Get_Predefined_Prim_Op_Address (Loc,
Tag_Node, Position),
Name =>
Make_Indexed_Component (Loc,
Prefix =>
Unchecked_Convert_To (RTE (RE_Predef_Prims_Table_Ptr),
Make_Explicit_Dereference (Loc,
Unchecked_Convert_To (RTE (RE_Addr_Ptr), Tag_Node))),
Expressions =>
New_List (Make_Integer_Literal (Loc, Position))),
Expression => Address_Node);
end Build_Set_Predefined_Prim_Op_Address;

View File

@ -90,15 +90,16 @@ package Exp_Atag is
-- Generates: TSD (Tag).Transportable;
function Build_Inherit_Predefined_Prims
(Loc : Source_Ptr;
Old_Tag_Node : Node_Id;
New_Tag_Node : Node_Id) return Node_Id;
(Loc : Source_Ptr;
Old_Tag_Node : Node_Id;
New_Tag_Node : Node_Id) return Node_Id;
-- Build code that inherits the predefined primitives of the parent.
--
-- Generates: Predefined_DT (New_T).D (All_Predefined_Prims) :=
-- Predefined_DT (Old_T).D (All_Predefined_Prims);
--
-- Required to build the dispatch tables with the 3.4 backend.
-- Required to build non-library level dispatch tables. Also required
-- when compiling without static dispatch tables support.
function Build_Inherit_Prims
(Loc : Source_Ptr;

View File

@ -3388,7 +3388,7 @@ package body Exp_Ch6 is
-- not be posting warnings on the inlined body so it is unneeded.
elsif Nkind (N) = N_Pragma
and then Chars (N) = Name_Unreferenced
and then Pragma_Name (N) = Name_Unreferenced
then
Rewrite (N, Make_Null_Statement (Sloc (N)));
return OK;
@ -4756,14 +4756,14 @@ package body Exp_Ch6 is
return;
end if;
-- Skip the first access-to-dispatch-table pointer since it leads
-- to the primary dispatch table. We are only concerned with the
-- secondary dispatch table pointers. Note that the access-to-
-- dispatch-table pointer corresponds to the first implemented
-- interface retrieved below.
-- Skip the first two access-to-dispatch-table pointers since they
-- leads to the primary dispatch table (predefined DT and user
-- defined DT). We are only concerned with the secondary dispatch
-- table pointers. Note that the access-to- dispatch-table pointer
-- corresponds to the first implemented interface retrieved below.
Iface_DT_Ptr :=
Next_Elmt (First_Elmt (Access_Disp_Table (Tagged_Typ)));
Next_Elmt (Next_Elmt (First_Elmt (Access_Disp_Table (Tagged_Typ))));
while Present (Iface_DT_Ptr)
and then Ekind (Node (Iface_DT_Ptr)) = E_Constant
@ -4776,23 +4776,41 @@ package body Exp_Ch6 is
Thunk_Code,
Build_Set_Predefined_Prim_Op_Address (Loc,
Tag_Node => New_Reference_To (Node (Iface_DT_Ptr), Loc),
Tag_Node =>
New_Reference_To (Node (Next_Elmt (Iface_DT_Ptr)), Loc),
Position => DT_Position (Prim),
Address_Node =>
Make_Attribute_Reference (Loc,
Prefix => New_Reference_To (Thunk_Id, Loc),
Attribute_Name => Name_Address)),
Unchecked_Convert_To (RTE (RE_Address),
Make_Attribute_Reference (Loc,
Prefix => New_Reference_To (Thunk_Id, Loc),
Attribute_Name => Name_Unrestricted_Access))),
Build_Set_Predefined_Prim_Op_Address (Loc,
Tag_Node => New_Reference_To
(Node (Next_Elmt (Iface_DT_Ptr)), Loc),
Tag_Node =>
New_Reference_To
(Node (Next_Elmt (Next_Elmt (Next_Elmt (Iface_DT_Ptr)))),
Loc),
Position => DT_Position (Prim),
Address_Node =>
Make_Attribute_Reference (Loc,
Prefix => New_Reference_To (Prim, Loc),
Attribute_Name => Name_Address))));
Unchecked_Convert_To (RTE (RE_Address),
Make_Attribute_Reference (Loc,
Prefix => New_Reference_To (Prim, Loc),
Attribute_Name => Name_Unrestricted_Access)))));
end if;
-- Skip the tag of the predefined primitives dispatch table
Next_Elmt (Iface_DT_Ptr);
pragma Assert (Has_Thunks (Node (Iface_DT_Ptr)));
-- Skip the tag of the no-thunks dispatch table
Next_Elmt (Iface_DT_Ptr);
pragma Assert (not Has_Thunks (Node (Iface_DT_Ptr)));
-- Skip the tag of the predefined primitives no-thunks dispatch
-- table
Next_Elmt (Iface_DT_Ptr);
pragma Assert (not Has_Thunks (Node (Iface_DT_Ptr)));

File diff suppressed because it is too large Load Diff

View File

@ -6,7 +6,7 @@
-- --
-- B o d y --
-- --
-- Copyright (C) 1992-2007, Free Software Foundation, Inc. --
-- Copyright (C) 1992-2008, Free Software Foundation, Inc. --
-- --
-- GNAT is free software; you can redistribute it and/or modify it under --
-- terms of the GNU General Public License as published by the Free Soft- --
@ -948,6 +948,43 @@ package body Exp_Util is
end if;
end Component_May_Be_Bit_Aligned;
-----------------------------------
-- Corresponding_Runtime_Package --
-----------------------------------
function Corresponding_Runtime_Package (Typ : Entity_Id) return RTU_Id is
Pkg_Id : RTU_Id := RTU_Null;
begin
pragma Assert (Is_Concurrent_Type (Typ));
if Ekind (Typ) in Protected_Kind then
if Has_Entries (Typ)
or else Has_Interrupt_Handler (Typ)
or else (Has_Attach_Handler (Typ)
and then not Restricted_Profile)
or else (Ada_Version >= Ada_05
and then Present (Interface_List (Parent (Typ))))
then
if Abort_Allowed
or else Restriction_Active (No_Entry_Queue) = False
or else Number_Entries (Typ) > 1
or else (Has_Attach_Handler (Typ)
and then not Restricted_Profile)
then
Pkg_Id := System_Tasking_Protected_Objects_Entries;
else
Pkg_Id := System_Tasking_Protected_Objects_Single_Entry;
end if;
else
Pkg_Id := System_Tasking_Protected_Objects;
end if;
end if;
return Pkg_Id;
end Corresponding_Runtime_Package;
-------------------------------
-- Convert_To_Actual_Subtype --
-------------------------------
@ -1384,6 +1421,10 @@ package body Exp_Util is
return;
end if;
-- Document what is going on here, why four Next's???
Next_Elmt (ADT);
Next_Elmt (ADT);
Next_Elmt (ADT);
Next_Elmt (ADT);
Next_Elmt (AI_Elmt);
@ -1420,7 +1461,7 @@ package body Exp_Util is
(not Is_Class_Wide_Type (Typ)
and then Ekind (Typ) /= E_Incomplete_Type);
ADT := Next_Elmt (First_Elmt (Access_Disp_Table (Typ)));
ADT := Next_Elmt (Next_Elmt (First_Elmt (Access_Disp_Table (Typ))));
pragma Assert (Present (Node (ADT)));
Find_Secondary_Table (Typ);
pragma Assert (Found);

View File

@ -6,7 +6,7 @@
-- --
-- S p e c --
-- --
-- Copyright (C) 1992-2007, Free Software Foundation, Inc. --
-- Copyright (C) 1992-2008, Free Software Foundation, Inc. --
-- --
-- GNAT is free software; you can redistribute it and/or modify it under --
-- terms of the GNU General Public License as published by the Free Soft- --
@ -212,43 +212,51 @@ package Exp_Util is
-- function itself must do its own cleanups.
function Component_May_Be_Bit_Aligned (Comp : Entity_Id) return Boolean;
-- This function is in charge of detecting record components that may cause
-- trouble in the back end if an attempt is made to assign the component.
-- The back end can handle such assignments with no problem if the
-- components involved are small (64-bits or less) records or scalar items
-- (including bit-packed arrays represented with modular types) or are both
-- aligned on a byte boundary (starting on a byte boundary, and occupying
-- an integral number of bytes).
-- This function is in charge of detecting record components that may
-- cause trouble in the back end if an attempt is made to assign the
-- component. The back end can handle such assignments with no problem if
-- the components involved are small (64-bits or less) records or scalar
-- items (including bit-packed arrays represented with modular types) or
-- are both aligned on a byte boundary (starting on a byte boundary, and
-- occupying an integral number of bytes).
--
-- However, problems arise for records larger than 64 bits, or for arrays
-- (other than bit-packed arrays represented with a modular type) if the
-- component starts on a non-byte boundary, or does not occupy an integral
-- number of bytes (i.e. there are some bits possibly shared with fields at
-- the start or beginning of the component). The back end cannot handle
-- number of bytes (i.e. there are some bits possibly shared with fields
-- at the start or beginning of the component). The back end cannot handle
-- loading and storing such components in a single operation.
--
-- This function is used to detect the troublesome situation. it is
-- conservative in the sense that it produces True unless it knows for sure
-- that the component is safe (as outlined in the first paragraph above).
-- The code generation for record and array assignment checks for trouble
-- using this function, and if so the assignment is generated
-- conservative in the sense that it produces True unless it knows for
-- sure that the component is safe (as outlined in the first paragraph
-- above). The code generation for record and array assignment checks for
-- trouble using this function, and if so the assignment is generated
-- component-wise, which the back end is required to handle correctly.
--
-- Note that in GNAT 3, the back end will reject such components anyway, so
-- the hard work in checking for this case is wasted in GNAT 3, but it's
-- harmless, so it is easier to do it in all cases, rather than
-- Note that in GNAT 3, the back end will reject such components anyway,
-- so the hard work in checking for this case is wasted in GNAT 3, but
-- it is harmless, so it is easier to do it in all cases, rather than
-- conditionalize it in GNAT 5 or beyond.
procedure Convert_To_Actual_Subtype (Exp : Node_Id);
-- The Etype of an expression is the nominal type of the expression, not
-- the actual subtype. Often these are the same, but not always. For
-- example, a reference to a formal of unconstrained type has the
-- The Etype of an expression is the nominal type of the expression,
-- not the actual subtype. Often these are the same, but not always.
-- For example, a reference to a formal of unconstrained type has the
-- unconstrained type as its Etype, but the actual subtype is obtained by
-- applying the actual bounds. This routine is given an expression, Exp,
-- and (if necessary), replaces it using Rewrite, with a conversion to the
-- actual subtype, building the actual subtype if necessary. If the
-- and (if necessary), replaces it using Rewrite, with a conversion to
-- the actual subtype, building the actual subtype if necessary. If the
-- expression is already of the requested type, then it is unchanged.
function Corresponding_Runtime_Package (Typ : Entity_Id) return RTU_Id;
-- Return the id of the runtime package that will provide support for
-- concurrent type Typ. Currently only protected types are supported,
-- and the returned value is one of the following:
-- System_Tasking_Protected_Objects
-- System_Tasking_Protected_Objects_Entries
-- System_Tasking_Protected_Objects_Single_Entry
function Current_Sem_Unit_Declarations return List_Id;
-- Return the a place where it is fine to insert declarations for the
-- current semantic unit. If the unit is a package body, return the

View File

@ -6,7 +6,7 @@
-- --
-- B o d y --
-- --
-- Copyright (C) 1992-2007, Free Software Foundation, Inc. --
-- Copyright (C) 1992-2008, Free Software Foundation, Inc. --
-- --
-- GNAT is free software; you can redistribute it and/or modify it under --
-- terms of the GNU General Public License as published by the Free Soft- --
@ -1386,12 +1386,15 @@ package body Sem_Util is
ADT : Elmt_Id;
begin
ADT := Next_Elmt (First_Elmt (Access_Disp_Table (T)));
ADT := Next_Elmt (Next_Elmt (First_Elmt (Access_Disp_Table (T))));
while Present (ADT)
and then Ekind (Node (ADT)) = E_Constant
and then Related_Type (Node (ADT)) /= Iface
loop
-- Skip the two secondary dispatch tables of Iface
-- Skip the secondary dispatch tables of Iface
Next_Elmt (ADT);
Next_Elmt (ADT);
Next_Elmt (ADT);
Next_Elmt (ADT);
end loop;
@ -3769,6 +3772,15 @@ package body Sem_Util is
return Entity_Id (Get_Name_Table_Info (Id));
end Get_Name_Entity_Id;
-------------------
-- Get_Pragma_Id --
-------------------
function Get_Pragma_Id (N : Node_Id) return Pragma_Id is
begin
return Get_Pragma_Id (Pragma_Name (N));
end Get_Pragma_Id;
---------------------------
-- Get_Referenced_Object --
---------------------------
@ -3906,31 +3918,42 @@ package body Sem_Util is
-----------------------------
function Has_Abstract_Interfaces
(Tagged_Type : Entity_Id;
(T : Entity_Id;
Use_Full_View : Boolean := True) return Boolean
is
Typ : Entity_Id;
begin
pragma Assert (Is_Record_Type (Tagged_Type)
and then Is_Tagged_Type (Tagged_Type));
-- Handle concurrent types
-- Handle concurrent record types
if Is_Concurrent_Record_Type (Tagged_Type)
and then Is_Non_Empty_List (Abstract_Interface_List (Tagged_Type))
then
return True;
if Is_Concurrent_Type (T) then
Typ := Corresponding_Record_Type (T);
else
Typ := T;
end if;
Typ := Tagged_Type;
if not Present (Typ)
or else not Is_Tagged_Type (Typ)
then
return False;
end if;
pragma Assert (Is_Record_Type (Typ));
-- Handle private types
if Use_Full_View
and then Present (Full_View (Tagged_Type))
and then Present (Full_View (Typ))
then
Typ := Full_View (Tagged_Type);
Typ := Full_View (Typ);
end if;
-- Handle concurrent record types
if Is_Concurrent_Record_Type (Typ)
and then Is_Non_Empty_List (Abstract_Interface_List (Typ))
then
return True;
end if;
loop
@ -3953,7 +3976,7 @@ package body Sem_Util is
-- Protect the frontend against wrong source with cyclic
-- derivations
or else Etype (Typ) = Tagged_Type;
or else Etype (Typ) = T;
-- Climb to the ancestor type handling private types
@ -8910,8 +8933,9 @@ package body Sem_Util is
procedure Set_Convention (E : Entity_Id; Val : Snames.Convention_Id) is
begin
Basic_Set_Convention (E, Val);
if Is_Type (E)
and then Ekind (Base_Type (E)) in Access_Subprogram_Type_Kind
and then Is_Access_Subprogram_Type (Base_Type (E))
and then Has_Foreign_Convention (E)
then
Set_Can_Use_Internal_Rep (E, False);
@ -8932,6 +8956,93 @@ package body Sem_Util is
Set_Name_Entity_Id (Chars (E), E);
end Set_Current_Entity;
---------------------------
-- Set_Debug_Info_Needed --
---------------------------
procedure Set_Debug_Info_Needed (T : Entity_Id) is
procedure Set_Debug_Info_Needed_If_Not_Set (E : Entity_Id);
pragma Inline (Set_Debug_Info_Needed_If_Not_Set);
-- Used to set debug info in a related node if not set already
--------------------------------------
-- Set_Debug_Info_Needed_If_Not_Set --
--------------------------------------
procedure Set_Debug_Info_Needed_If_Not_Set (E : Entity_Id) is
begin
if Present (E)
and then not Needs_Debug_Info (E)
then
Set_Debug_Info_Needed (E);
end if;
end Set_Debug_Info_Needed_If_Not_Set;
-- Start of processing for Set_Debug_Info_Needed
begin
-- Nothing to do if argument is Empty or has Debug_Info_Off set, which
-- indicates that Debug_Info_Needed is never required for the entity.
if No (T)
or else Debug_Info_Off (T)
then
return;
end if;
-- Set flag in entity itself. Note that we will go through the following
-- circuitry even if the flag is already set on T. That's intentional,
-- it makes sure that the flag will be set in subsidiary entities.
Set_Needs_Debug_Info (T);
-- Set flag on subsidiary entities if not set already
if Is_Object (T) then
Set_Debug_Info_Needed_If_Not_Set (Etype (T));
elsif Is_Type (T) then
Set_Debug_Info_Needed_If_Not_Set (Etype (T));
if Is_Record_Type (T) then
declare
Ent : Entity_Id := First_Entity (T);
begin
while Present (Ent) loop
Set_Debug_Info_Needed_If_Not_Set (Ent);
Next_Entity (Ent);
end loop;
end;
elsif Is_Array_Type (T) then
Set_Debug_Info_Needed_If_Not_Set (Component_Type (T));
declare
Indx : Node_Id := First_Index (T);
begin
while Present (Indx) loop
Set_Debug_Info_Needed_If_Not_Set (Etype (Indx));
Indx := Next_Index (Indx);
end loop;
end;
if Is_Packed (T) then
Set_Debug_Info_Needed_If_Not_Set (Packed_Array_Type (T));
end if;
elsif Is_Access_Type (T) then
Set_Debug_Info_Needed_If_Not_Set (Directly_Designated_Type (T));
elsif Is_Private_Type (T) then
Set_Debug_Info_Needed_If_Not_Set (Full_View (T));
elsif Is_Protected_Type (T) then
Set_Debug_Info_Needed_If_Not_Set (Corresponding_Record_Type (T));
end if;
end if;
end Set_Debug_Info_Needed;
---------------------------------
-- Set_Entity_With_Style_Check --
---------------------------------