exp_ch5.adb: Add comment.

2012-02-22  Robert Dewar  <dewar@adacore.com>

	* exp_ch5.adb: Add comment.
	* sem_ch12.adb, exp_ch6.adb: minor reformatting

From-SVN: r184472

gcc/ada/ChangeLog

+2012-02-22  Robert Dewar  <dewar@adacore.com>
+
+	* exp_ch5.adb: Add comment.
+	* sem_ch12.adb, exp_ch6.adb: minor reformatting
+
 2012-02-22  Ed Schonberg  <schonberg@adacore.com>
 
 	* freeze.adb (Freeze_Entity): Do not perform type layout within

gcc/ada/exp_ch5.adb

@@ -2095,6 +2095,9 @@ package body Exp_Ch5 is
                   --  is not caught at the point of instantiation in earlier
                   --  versions.
 
+                  --  This is wrong, error messages cannot be issued during
+                  --  expansion, since they would be missed in -gnatc mode ???
+
                   Error_Msg_N ("assignment not available on limited type", N);
                   return;
                end if;

gcc/ada/exp_ch6.adb

@@ -1418,11 +1418,14 @@ package body Exp_Ch6 is
 
          if Is_By_Reference_Type (Etype (Formal)) then
 
-         --  If the front-end does not perform full type layout, the actual
-         --  may in fact be properly aligned but there is not enough front-end
-         --  information to determine this. In that case gigi will emit an
-         --  error if a copy is not legal, or generate the proper code.
-         --  For other backends we report the error now.
+            --  If the front-end does not perform full type layout, the actual
+            --  may in fact be properly aligned but there is not enough front-
+            --  end information to determine this. In that case gigi will emit
+            --  an error if a copy is not legal, or generate the proper code.
+            --  For other backends we report the error now.
+
+            --  Seems wrong to be issuing an error in the expander, since it
+            --  will be missed in -gnatc mode ???
 
             if Frontend_Layout_On_Target then
                Error_Msg_N
@@ -6130,7 +6133,6 @@ package body Exp_Ch6 is
 
          begin
             Set_Has_Completion (Subp, False);
-            --  Set_Has_Delayed_Freeze (Subp);
             Append_Freeze_Action (Subp, Bod);
 
             --  The body now contains raise statements, so calls to it will

gcc/ada/sem_ch12.adb

@@ -3730,8 +3730,8 @@ package body Sem_Ch12 is
          --  (Could we do better and remove the original body???)
 
          if Distribution_Stub_Mode = Generate_Caller_Stub_Body
-              and then Comes_From_Source (N)
-              and then Nkind (Parent (N)) = N_Compilation_Unit
+           and then Comes_From_Source (N)
+           and then Nkind (Parent (N)) = N_Compilation_Unit
          then
             Needs_Body := False;
          end if;
@@ -3741,9 +3741,7 @@ package body Sem_Ch12 is
             --  Here is a defence against a ludicrous number of instantiations
             --  caused by a circular set of instantiation attempts.
 
-            if Pending_Instantiations.Last >
-                 Hostparm.Max_Instantiations
-            then
+            if Pending_Instantiations.Last > Hostparm.Max_Instantiations then
                Error_Msg_N ("too many instantiations", N);
                raise Unrecoverable_Error;
             end if;
@@ -3857,13 +3855,13 @@ package body Sem_Ch12 is
             Insert_Before (N, Act_Decl);
             Analyze (Act_Decl);
 
-         --  For an instantiation that is a compilation unit, place declaration
-         --  on current node so context is complete for analysis (including
-         --  nested instantiations). If this is the main unit, the declaration
-         --  eventually replaces the instantiation node. If the instance body
-         --  is created later, it replaces the instance node, and the
-         --  declaration is attached to it (see
-         --  Build_Instance_Compilation_Unit_Nodes).
+         --  For an instantiation that is a compilation unit, place
+         --  declaration on current node so context is complete for analysis
+         --  (including nested instantiations). If this is the main unit,
+         --  the declaration eventually replaces the instantiation node.
+         --  If the instance body is created later, it replaces the
+         --  instance node, and the declaration is attached to it
+         --  (see Build_Instance_Compilation_Unit_Nodes).
 
          else
             if Cunit_Entity (Current_Sem_Unit) = Defining_Entity (N) then