Replace heavy address clause by 'Unrestricted_Access...

Replace heavy address clause by 'Unrestricted_Access, cleaner and more portable
across GNAT targets, since this kind of address clause is not supported by
VM back-ends (.NET/JGNAT).

From-SVN: r136020

gcc/ada/a-textio.adb

@@ -147,11 +147,8 @@ package body Ada.Text_IO is
    -----------
 
    procedure Close (File : in out File_Type) is
-      AFCB : aliased AP;
-      for AFCB'Address use File'Address;
-      pragma Import (Ada, AFCB);
    begin
-      FIO.Close (AFCB'Access);
+      FIO.Close (AP (File)'Unrestricted_Access);
    end Close;
 
    ---------
@@ -249,11 +246,8 @@ package body Ada.Text_IO is
    ------------
 
    procedure Delete (File : in out File_Type) is
-      AFCB : aliased AP;
-      for AFCB'Address use File'Address;
-      pragma Import (Ada, AFCB);
    begin
-      FIO.Delete (AFCB'Access);
+      FIO.Delete (AP (File)'Unrestricted_Access);
    end Delete;
 
    -----------------
@@ -1579,9 +1573,6 @@ package body Ada.Text_IO is
      (File : in out File_Type;
       Mode : File_Mode)
    is
-      AFCB : aliased AP;
-      for AFCB'Address use File'Address;
-      pragma Import (Ada, AFCB);
    begin
       --  Don't allow change of mode for current file (RM A.10.2(5))
 
@@ -1594,7 +1585,7 @@ package body Ada.Text_IO is
       end if;
 
       Terminate_Line (File);
-      FIO.Reset (AFCB'Access, To_FCB (Mode));
+      FIO.Reset (AP (File)'Unrestricted_Access, To_FCB (Mode));
       File.Page := 1;
       File.Line := 1;
       File.Col  := 1;
@@ -1605,12 +1596,9 @@ package body Ada.Text_IO is
    end Reset;
 
    procedure Reset (File : in out File_Type) is
-      AFCB : aliased AP;
-      for AFCB'Address use File'Address;
-      pragma Import (Ada, AFCB);
    begin
       Terminate_Line (File);
-      FIO.Reset (AFCB'Access);
+      FIO.Reset (AP (File)'Unrestricted_Access);
       File.Page := 1;
       File.Line := 1;
       File.Col  := 1;

gcc/ada/a-witeio.adb

@@ -133,11 +133,8 @@ package body Ada.Wide_Text_IO is
    -----------
 
    procedure Close (File : in out File_Type) is
-      AFCB : aliased AP;
-      for AFCB'Address use File'Address;
-      pragma Import (Ada, AFCB);
    begin
-      FIO.Close (AFCB'Access);
+      FIO.Close (AP (File)'Unrestricted_Access);
    end Close;
 
    ---------
@@ -235,11 +232,8 @@ package body Ada.Wide_Text_IO is
    ------------
 
    procedure Delete (File : in out File_Type) is
-      AFCB : aliased AP;
-      for AFCB'Address use File'Address;
-      pragma Import (Ada, AFCB);
    begin
-      FIO.Delete (AFCB'Access);
+      FIO.Delete (AP (File)'Unrestricted_Access);
    end Delete;
 
    -----------------
@@ -1314,9 +1308,6 @@ package body Ada.Wide_Text_IO is
      (File : in out File_Type;
       Mode : File_Mode)
    is
-      AFCB : aliased AP;
-      for AFCB'Address use File'Address;
-      pragma Import (Ada, AFCB);
    begin
       --  Don't allow change of mode for current file (RM A.10.2(5))
 
@@ -1329,7 +1320,7 @@ package body Ada.Wide_Text_IO is
       end if;
 
       Terminate_Line (File);
-      FIO.Reset (AFCB'Access, To_FCB (Mode));
+      FIO.Reset (AP (File)'Unrestricted_Access, To_FCB (Mode));
       File.Page := 1;
       File.Line := 1;
       File.Col  := 1;
@@ -1340,12 +1331,9 @@ package body Ada.Wide_Text_IO is
    end Reset;
 
    procedure Reset (File : in out File_Type) is
-      AFCB : aliased AP;
-      for AFCB'Address use File'Address;
-      pragma Import (Ada, AFCB);
    begin
       Terminate_Line (File);
-      FIO.Reset (AFCB'Access);
+      FIO.Reset (AP (File)'Unrestricted_Access);
       File.Page := 1;
       File.Line := 1;
       File.Col  := 1;

gcc/ada/a-ztexio.adb

@@ -133,11 +133,8 @@ package body Ada.Wide_Wide_Text_IO is
    -----------
 
    procedure Close (File : in out File_Type) is
-      AFCB : aliased AP;
-      for AFCB'Address use File'Address;
-      pragma Import (Ada, AFCB);
    begin
-      FIO.Close (AFCB'Access);
+      FIO.Close (AP (File)'Unrestricted_Access);
    end Close;
 
    ---------
@@ -235,11 +232,8 @@ package body Ada.Wide_Wide_Text_IO is
    ------------
 
    procedure Delete (File : in out File_Type) is
-      AFCB : aliased AP;
-      for AFCB'Address use File'Address;
-      pragma Import (Ada, AFCB);
    begin
-      FIO.Delete (AFCB'Access);
+      FIO.Delete (AP (File)'Unrestricted_Access);
    end Delete;
 
    -----------------
@@ -1314,9 +1308,6 @@ package body Ada.Wide_Wide_Text_IO is
      (File : in out File_Type;
       Mode : File_Mode)
    is
-      AFCB : aliased AP;
-      for AFCB'Address use File'Address;
-      pragma Import (Ada, AFCB);
    begin
       --  Don't allow change of mode for current file (RM A.10.2(5))
 
@@ -1329,7 +1320,7 @@ package body Ada.Wide_Wide_Text_IO is
       end if;
 
       Terminate_Line (File);
-      FIO.Reset (AFCB'Access, To_FCB (Mode));
+      FIO.Reset (AP (File)'Unrestricted_Access, To_FCB (Mode));
       File.Page := 1;
       File.Line := 1;
       File.Col  := 1;
@@ -1340,12 +1331,9 @@ package body Ada.Wide_Wide_Text_IO is
    end Reset;
 
    procedure Reset (File : in out File_Type) is
-      AFCB : aliased AP;
-      for AFCB'Address use File'Address;
-      pragma Import (Ada, AFCB);
    begin
       Terminate_Line (File);
-      FIO.Reset (AFCB'Access);
+      FIO.Reset (AP (File)'Unrestricted_Access);
       File.Page := 1;
       File.Line := 1;
       File.Col  := 1;

gcc/ada/s-direio.adb

@@ -251,21 +251,17 @@ package body System.Direct_IO is
    -----------
 
    procedure Reset (File : in out File_Type; Mode : FCB.File_Mode) is
-      AFCB : aliased AP;
-      for AFCB'Address use File'Address;
-      pragma Import (Ada, AFCB);
+      pragma Unmodified (File);
    begin
-      FIO.Reset (AFCB'Access, Mode);
+      FIO.Reset (AP (File)'Unrestricted_Access, Mode);
       File.Index := 1;
       File.Last_Op := Op_Read;
    end Reset;
 
    procedure Reset (File : in out File_Type) is
-      AFCB : aliased AP;
-      for AFCB'Address use File'Address;
-      pragma Import (Ada, AFCB);
+      pragma Unmodified (File);
    begin
-      FIO.Reset (AFCB'Access);
+      FIO.Reset (AP (File)'Unrestricted_Access);
       File.Index := 1;
       File.Last_Op := Op_Read;
    end Reset;