sem_prag.adb (Analyze pragma, [...]): Analyze argument of pragma, to capture…

sem_prag.adb (Analyze pragma, [...]): Analyze argument of pragma, to capture global references if the context is generic.

2009-07-10  Ed Schonberg  <schonberg@adacore.com>

	* sem_prag.adb (Analyze pragma, case Task_Name): Analyze argument of
	pragma, to capture global references if the context is generic.

	* exp_ch2.adb (Expand_Discriminant): If a task type discriminant
	appears within the initialization procedure for the corresponding
	record, replace it with the proper discriminal.

From-SVN: r149459

gcc/ada/exp_ch2.adb

@@ -6,7 +6,7 @@
 --                                                                          --
 --                                 B o d y                                  --
 --                                                                          --
---          Copyright (C) 1992-2008, Free Software Foundation, Inc.         --
+--          Copyright (C) 1992-2009, 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- --
@@ -308,6 +308,17 @@ package body Exp_Ch2 is
            and then In_Entry
          then
             Set_Entity (N, CR_Discriminant (Entity (N)));
+
+            --  Finally, if the entity is the discriminant of the original
+            --  type declaration, and we are within the initialization
+            --  procedure for a task, the designated entity is the
+            --  discriminal of the task body. This can happen when the
+            --  argument of pragma Task_Name mentions a discriminant,
+            --  because the pragma is analyzed in the task declaration
+            --  but is expanded in the call to Create_Task in the init_proc.
+
+         elsif Within_Init_Proc then
+            Set_Entity (N, Discriminal (CR_Discriminant (Entity (N))));
          else
             Set_Entity (N, Discriminal (Entity (N)));
          end if;

gcc/ada/sem_prag.adb

@@ -11248,9 +11248,11 @@ package body Sem_Prag is
             Arg := Expression (Arg1);
 
             --  The expression is used in the call to Create_Task, and must be
-            --  expanded there, not in the context of the current spec.
+            --  expanded there, not in the context of the current spec. It must
+            --  however be analyzed to capture global references, in case it
+            --  appears in a generic context.
 
-            Preanalyze_And_Resolve (New_Copy_Tree (Arg), Standard_String);
+            Preanalyze_And_Resolve (Arg, Standard_String);
 
             if Nkind (P) /= N_Task_Definition then
                Pragma_Misplaced;