begin
Index := First_Index (T);
-
while Present (Index) loop
if Nkind (Index) = N_Range then
Get_Index_Bounds (Index, Low, High);
-------------------------------------
function Static_Discriminated_Components
- (T : Entity_Id)
- return Boolean
+ (T : Entity_Id) return Boolean
is
Constraint : Elmt_Id;
Result : in out List_Id)
is
L : constant List_Id := Freeze_Entity (Ent, Loc);
-
begin
if Is_Non_Empty_List (L) then
if Result = No_List then
procedure Freeze_Before (N : Node_Id; T : Entity_Id) is
Freeze_Nodes : constant List_Id := Freeze_Entity (T, Sloc (N));
-
begin
if Is_Non_Empty_List (Freeze_Nodes) then
Insert_Actions (N, Freeze_Nodes);
if Ekind (Comp) = E_Component
or else Ekind (Comp) = E_Discriminant
then
- -- Check for error of component clause given for variable
- -- sized type. We have to delay this test till this point,
- -- since the component type has to be frozen for us to know
- -- if it is variable length. We omit this test in a generic
- -- context, it will be applied at instantiation time.
-
declare
CC : constant Node_Id := Component_Clause (Comp);
begin
+ -- Check for error of component clause given for variable
+ -- sized type. We have to delay this test till this point,
+ -- since the component type has to be frozen for us to know
+ -- if it is variable length. We omit this test in a generic
+ -- context, it will be applied at instantiation time.
+
if Present (CC) then
Placed_Component := True;
else
Unplaced_Component := True;
end if;
- end;
- -- If component clause is present, then deal with the
- -- non-default bit order case. We cannot do this before
- -- the freeze point, because there is no required order
- -- for the component clause and the bit_order clause.
+ -- Case of component requires byte alignment
- -- We only do this processing for the base type, and in
- -- fact that's important, since otherwise if there are
- -- record subtypes, we could reverse the bits once for
- -- each subtype, which would be incorrect.
+ if Must_Be_On_Byte_Boundary (Etype (Comp)) then
- if Present (Component_Clause (Comp))
- and then Reverse_Bit_Order (Rec)
- and then Ekind (E) = E_Record_Type
- then
- declare
- CFB : constant Uint := Component_Bit_Offset (Comp);
- CSZ : constant Uint := Esize (Comp);
- CLC : constant Node_Id := Component_Clause (Comp);
- Pos : constant Node_Id := Position (CLC);
- FB : constant Node_Id := First_Bit (CLC);
+ -- Set the enclosing record to also require byte align
- Storage_Unit_Offset : constant Uint :=
- CFB / System_Storage_Unit;
+ Set_Must_Be_On_Byte_Boundary (Rec);
- Start_Bit : constant Uint :=
- CFB mod System_Storage_Unit;
+ -- Check for component clause that is inconsistent
+ -- with the required byte boundary alignment.
- begin
- -- Cases where field goes over storage unit boundary
+ if Present (CC)
+ and then Normalized_First_Bit (Comp) mod
+ System_Storage_Unit /= 0
+ then
+ Error_Msg_N
+ ("component & must be byte aligned",
+ Component_Name (Component_Clause (Comp)));
+ end if;
+ end if;
- if Start_Bit + CSZ > System_Storage_Unit then
+ -- If component clause is present, then deal with the
+ -- non-default bit order case. We cannot do this before
+ -- the freeze point, because there is no required order
+ -- for the component clause and the bit_order clause.
- -- Allow multi-byte field but generate warning
+ -- We only do this processing for the base type, and in
+ -- fact that's important, since otherwise if there are
+ -- record subtypes, we could reverse the bits once for
+ -- each subtype, which would be incorrect.
- if Start_Bit mod System_Storage_Unit = 0
- and then CSZ mod System_Storage_Unit = 0
- then
- Error_Msg_N
- ("multi-byte field specified with non-standard"
- & " Bit_Order?", CLC);
+ if Present (CC)
+ and then Reverse_Bit_Order (Rec)
+ and then Ekind (E) = E_Record_Type
+ then
+ declare
+ CFB : constant Uint := Component_Bit_Offset (Comp);
+ CSZ : constant Uint := Esize (Comp);
+ CLC : constant Node_Id := Component_Clause (Comp);
+ Pos : constant Node_Id := Position (CLC);
+ FB : constant Node_Id := First_Bit (CLC);
+
+ Storage_Unit_Offset : constant Uint :=
+ CFB / System_Storage_Unit;
+
+ Start_Bit : constant Uint :=
+ CFB mod System_Storage_Unit;
+
+ begin
+ -- Cases where field goes over storage unit boundary
+
+ if Start_Bit + CSZ > System_Storage_Unit then
- if Bytes_Big_Endian then
+ -- Allow multi-byte field but generate warning
+
+ if Start_Bit mod System_Storage_Unit = 0
+ and then CSZ mod System_Storage_Unit = 0
+ then
Error_Msg_N
- ("bytes are not reversed "
- & "(component is big-endian)?", CLC);
+ ("multi-byte field specified with non-standard"
+ & " Bit_Order?", CLC);
+
+ if Bytes_Big_Endian then
+ Error_Msg_N
+ ("bytes are not reversed "
+ & "(component is big-endian)?", CLC);
+ else
+ Error_Msg_N
+ ("bytes are not reversed "
+ & "(component is little-endian)?", CLC);
+ end if;
+
+ -- Do not allow non-contiguous field
+
else
Error_Msg_N
- ("bytes are not reversed "
- & "(component is little-endian)?", CLC);
+ ("attempt to specify non-contiguous field"
+ & " not permitted", CLC);
+ Error_Msg_N
+ ("\(caused by non-standard Bit_Order "
+ & "specified)", CLC);
end if;
- -- Do not allow non-contiguous field
+ -- Case where field fits in one storage unit
else
- Error_Msg_N
- ("attempt to specify non-contiguous field"
- & " not permitted", CLC);
- Error_Msg_N
- ("\(caused by non-standard Bit_Order "
- & "specified)", CLC);
- end if;
-
- -- Case where field fits in one storage unit
+ -- Give warning if suspicious component clause
- else
- -- Give warning if suspicious component clause
-
- if Intval (FB) >= System_Storage_Unit then
- Error_Msg_N
- ("?Bit_Order clause does not affect " &
- "byte ordering", Pos);
- Error_Msg_Uint_1 :=
- Intval (Pos) + Intval (FB) / System_Storage_Unit;
- Error_Msg_N
- ("?position normalized to ^ before bit " &
- "order interpreted", Pos);
- end if;
+ if Intval (FB) >= System_Storage_Unit then
+ Error_Msg_N
+ ("?Bit_Order clause does not affect " &
+ "byte ordering", Pos);
+ Error_Msg_Uint_1 :=
+ Intval (Pos) + Intval (FB) /
+ System_Storage_Unit;
+ Error_Msg_N
+ ("?position normalized to ^ before bit " &
+ "order interpreted", Pos);
+ end if;
- -- Here is where we fix up the Component_Bit_Offset
- -- value to account for the reverse bit order.
- -- Some examples of what needs to be done are:
+ -- Here is where we fix up the Component_Bit_Offset
+ -- value to account for the reverse bit order.
+ -- Some examples of what needs to be done are:
- -- First_Bit .. Last_Bit Component_Bit_Offset
- -- old new old new
+ -- First_Bit .. Last_Bit Component_Bit_Offset
+ -- old new old new
- -- 0 .. 0 7 .. 7 0 7
- -- 0 .. 1 6 .. 7 0 6
- -- 0 .. 2 5 .. 7 0 5
- -- 0 .. 7 0 .. 7 0 4
+ -- 0 .. 0 7 .. 7 0 7
+ -- 0 .. 1 6 .. 7 0 6
+ -- 0 .. 2 5 .. 7 0 5
+ -- 0 .. 7 0 .. 7 0 4
- -- 1 .. 1 6 .. 6 1 6
- -- 1 .. 4 3 .. 6 1 3
- -- 4 .. 7 0 .. 3 4 0
+ -- 1 .. 1 6 .. 6 1 6
+ -- 1 .. 4 3 .. 6 1 3
+ -- 4 .. 7 0 .. 3 4 0
- -- The general rule is that the first bit is
- -- is obtained by subtracting the old ending bit
- -- from storage_unit - 1.
+ -- The general rule is that the first bit is
+ -- is obtained by subtracting the old ending bit
+ -- from storage_unit - 1.
- Set_Component_Bit_Offset (Comp,
- (Storage_Unit_Offset * System_Storage_Unit)
- + (System_Storage_Unit - 1)
- - (Start_Bit + CSZ - 1));
+ Set_Component_Bit_Offset
+ (Comp,
+ (Storage_Unit_Offset * System_Storage_Unit) +
+ (System_Storage_Unit - 1) -
+ (Start_Bit + CSZ - 1));
- Set_Normalized_First_Bit (Comp,
- Component_Bit_Offset (Comp) mod System_Storage_Unit);
- end if;
- end;
- end if;
+ Set_Normalized_First_Bit
+ (Comp,
+ Component_Bit_Offset (Comp) mod
+ System_Storage_Unit);
+ end if;
+ end;
+ end if;
+ end;
end if;
Next_Entity (Comp);
Set_Has_Non_Standard_Rep (Base_Type (E));
Set_Is_Packed (Base_Type (E));
end if;
- end;
- Set_Component_Alignment_If_Not_Set (E);
+ Set_Component_Alignment_If_Not_Set (E);
- -- If the array is packed, we must create the packed array
- -- type to be used to actually implement the type. This is
- -- only needed for real array types (not for string literal
- -- types, since they are present only for the front end).
+ -- If the array is packed, we must create the packed array
+ -- type to be used to actually implement the type. This is
+ -- only needed for real array types (not for string literal
+ -- types, since they are present only for the front end).
- if Is_Packed (E)
- and then Ekind (E) /= E_String_Literal_Subtype
- then
- Create_Packed_Array_Type (E);
- Freeze_And_Append (Packed_Array_Type (E), Loc, Result);
+ if Is_Packed (E)
+ and then Ekind (E) /= E_String_Literal_Subtype
+ then
+ Create_Packed_Array_Type (E);
+ Freeze_And_Append (Packed_Array_Type (E), Loc, Result);
- -- Size information of packed array type is copied to the
- -- array type, since this is really the representation.
+ -- Size information of packed array type is copied to the
+ -- array type, since this is really the representation.
- Set_Size_Info (E, Packed_Array_Type (E));
- Set_RM_Size (E, RM_Size (Packed_Array_Type (E)));
- end if;
+ Set_Size_Info (E, Packed_Array_Type (E));
+ Set_RM_Size (E, RM_Size (Packed_Array_Type (E)));
+ end if;
+
+ -- For non-packed arrays set the alignment of the array
+ -- to the alignment of the component type if it is unknown.
+ -- Skip this in the atomic case, since atomic arrays may
+ -- need larger alignments.
+
+ if not Is_Packed (E)
+ and then Unknown_Alignment (E)
+ and then Known_Alignment (Ctyp)
+ and then Known_Static_Component_Size (E)
+ and then Known_Static_Esize (Ctyp)
+ and then Esize (Ctyp) = Component_Size (E)
+ and then not Is_Atomic (E)
+ then
+ Set_Alignment (E, Alignment (Component_Type (E)));
+ end if;
+ end;
-- For a class-wide type, the corresponding specific type is
-- frozen as well (RM 13.14(15))
-- Returns size of type with given bounds. Also leaves these
-- bounds set as the current bounds of the Typ.
+ -----------
+ -- Fsize --
+ -----------
+
function Fsize (Lov, Hiv : Ureal) return Nat is
begin
Set_Realval (Lo, Lov);
return Minimum_Size (Typ);
end Fsize;
- -- Start of processing for Freeze_Fixed_Point_Type;
+ -- Start of processing for Freeze_Fixed_Point_Type
begin
-- If Esize of a subtype has not previously been set, set it now
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