This patch fixes a crash on an aspect specification for Storage_Size for
a type T when the expression for the aspect depends on attributes of a
previously declared type that is not frozen yet. The temporary
declaration that captures the value of the aspect must be part of the
actions attached to the freeze node for T.
Tested on x86_64-pc-linux-gnu, committed on trunk
2019-08-20 Ed Schonberg <schonb...@adacore.com>
gcc/ada/
* exp_ch13.adb (Expand_N_Attribute_Definition_Clause, case
Storage_Size): If the expression for Storage_Size is not static
it may depend on characterstics of another type that may bot be
frozen yet, so the elaboration of the expression for the aspect
must be attached directly to the freeze actions of the type to
which it applies.
gcc/testsuite/
* gnat.dg/storage_size1.adb: New testcase.--- gcc/ada/exp_ch13.adb
+++ gcc/ada/exp_ch13.adb
@@ -220,9 +220,9 @@ package body Exp_Ch13 is
-- task_typeZ := expression
if Ekind (Ent) = E_Task_Type then
+
declare
Assign : Node_Id;
-
begin
Assign :=
Make_Assignment_Statement (Loc,
@@ -261,15 +261,35 @@ package body Exp_Ch13 is
Make_Defining_Identifier (Loc,
Chars => New_External_Name (Chars (Ent), 'V'));
- -- Insert the declaration of the object
-
- Insert_Action (N,
- Make_Object_Declaration (Loc,
- Defining_Identifier => V,
- Object_Definition =>
- New_Occurrence_Of (RTE (RE_Storage_Offset), Loc),
- Expression =>
- Convert_To (RTE (RE_Storage_Offset), Expression (N))));
+ -- Insert the declaration of the object. If the expression
+ -- is not static it may depend on some other type that is
+ -- not frozen yet, so attach the declaration that captures
+ -- the value of the expression to the actions of the freeze
+ -- node of the current type.
+
+ declare
+ Decl : constant Node_Id :=
+ Make_Object_Declaration (Loc,
+ Defining_Identifier => V,
+ Object_Definition =>
+ New_Occurrence_Of (RTE (RE_Storage_Offset), Loc),
+ Expression =>
+ Convert_To
+ (RTE (RE_Storage_Offset), Expression (N)));
+ begin
+ if not Is_OK_Static_Expression (Expression (N))
+ and then Present (Freeze_Node (Ent))
+ then
+ if No (Actions (Freeze_Node (Ent))) then
+ Set_Actions (Freeze_Node (Ent), New_List (Decl));
+ else
+ Append (Decl, Actions (Freeze_Node (Ent)));
+ end if;
+
+ else
+ Insert_Action (N, Decl);
+ end if;
+ end;
Set_Storage_Size_Variable (Ent, Entity_Id (V));
end if;
--- /dev/null
new file mode 100644
+++ gcc/testsuite/gnat.dg/storage_size1.adb
@@ -0,0 +1,19 @@
+-- { dg-do compile }
+
+with Ada.Text_IO; with Ada.Integer_Text_IO;
+
+procedure Storage_Size1 is
+
+ package O renames Ada.Text_IO;
+ package T renames Ada.Integer_Text_IO;
+
+ type Struct is record first, second: Integer; end record;
+
+ type SP is access Struct
+ with Storage_Size => 64 * Struct'Max_Size_In_Storage_Elements;
+
+begin
+
+ T.Put(SP'Storage_Size); O.New_Line(1);
+
+end Storage_Size1;
