[multiple changes]

2017-01-13  Ed Schonberg  <schonberg@adacore.com>

	* sem_aggr.adb (Resolve_Array_Aggregate): The code that verifies
	the legality of An others clause applies as well to a choice in
	an Iterated_component_ association.
	(Resolve_Iterated_Component_Association): An others choice
	is legal.
	* exp_aggr.adb (Aggr_Assignment_OK_For_Backend): An
	Iterated_Component_Association is not static.

2017-01-13  Hristian Kirtchev  <kirtchev@adacore.com>

	* exp_ch3.adb (Freeze_Type): Mark the Ghost mode as set in case
	control is passed to the expresion handler before the new mode
	is set.
	* sem_ch12.adb (Analyze_Package_Instantiation,
	Analyze_Subprogram_Instantiation): Mark the Ghost mode as set
	in case control is passed to the expresion handler before the
	new mode is set.

From-SVN: r244417

gcc/ada/ChangeLog

+2017-01-13  Ed Schonberg  <schonberg@adacore.com>
+
+	* sem_aggr.adb (Resolve_Array_Aggregate): The code that verifies
+	the legality of An others clause applies as well to a choice in
+	an Iterated_component_ association.
+	(Resolve_Iterated_Component_Association): An others choice
+	is legal.
+	* exp_aggr.adb (Aggr_Assignment_OK_For_Backend): An
+	Iterated_Component_Association is not static.
+
+2017-01-13  Hristian Kirtchev  <kirtchev@adacore.com>
+
+	* exp_ch3.adb (Freeze_Type): Mark the Ghost mode as set in case
+	control is passed to the expresion handler before the new mode
+	is set.
+	* sem_ch12.adb (Analyze_Package_Instantiation,
+	Analyze_Subprogram_Instantiation): Mark the Ghost mode as set
+	in case control is passed to the expresion handler before the
+	new mode is set.
+
 2017-01-13  Hristian Kirtchev  <kirtchev@adacore.com>
 
 	* sem_aggr.adb, sem_ch3.adb, inline.adb, sem_util.adb, exp_ch4.adb,

gcc/ada/exp_aggr.adb

@@ -4272,7 +4272,7 @@ package body Exp_Aggr is
       --  values, and can be passed as is to the back-end without further
       --  expansion.
       --  An Iterated_component_Association is treated as non-static, but there
-      --  are posibilities for optimization here.
+      --  are possibilities for optimization here.
 
       function Flatten
         (N   : Node_Id;
@@ -4945,6 +4945,13 @@ package body Exp_Aggr is
             end if;
          end loop;
 
+         --  An Iterated_Component_Association involves a loop (in most cases)
+         --  and is never static.
+
+         if Nkind (Parent (Expr)) = N_Iterated_Component_Association then
+            return False;
+         end if;
+
          if not Is_Discrete_Type (Ctyp) then
             return False;
          end if;

gcc/ada/exp_ch3.adb

@@ -7106,8 +7106,10 @@ package body Exp_Ch3 is
       --  Local variables
 
       Def_Id : constant Entity_Id := Entity (N);
-      Mode   : Ghost_Mode_Type;
-      Result : Boolean := False;
+
+      Mode     : Ghost_Mode_Type;
+      Mode_Set : Boolean := False;
+      Result   : Boolean := False;
 
    --  Start of processing for Freeze_Type
 
@@ -7117,6 +7119,7 @@ package body Exp_Ch3 is
       --  marked as Ghost.
 
       Set_Ghost_Mode (Def_Id, Mode);
+      Mode_Set := True;
 
       --  Process any remote access-to-class-wide types designating the type
       --  being frozen.
@@ -7444,12 +7447,18 @@ package body Exp_Ch3 is
          Build_Invariant_Procedure_Body (Def_Id);
       end if;
 
-      Restore_Ghost_Mode (Mode);
+      if Mode_Set then
+         Restore_Ghost_Mode (Mode);
+      end if;
+
       return Result;
 
    exception
       when RE_Not_Available =>
-         Restore_Ghost_Mode (Mode);
+         if Mode_Set then
+            Restore_Ghost_Mode (Mode);
+         end if;
+
          return False;
    end Freeze_Type;
 

gcc/ada/sem_aggr.adb

@@ -1656,19 +1656,18 @@ package body Sem_Aggr is
 
          while Present (Choice) loop
             if Nkind (Choice) = N_Others_Choice then
-               Error_Msg_N ("others choice not allowed in this context", N);
                Others_Present := True;
 
             else
                Analyze_And_Resolve (Choice, Index_Typ);
             end if;
 
-            Nb_Choices := Nb_Choices + 1;
             Next (Choice);
          end loop;
 
          --  Create a scope in which to introduce an index, which is usually
-         --  visible in the expression for the component.
+         --  visible in the expression for the component, and needed for its
+         --  analysis.
 
          Ent := New_Internal_Entity (E_Loop, Current_Scope, Loc, 'L');
          Set_Etype  (Ent, Standard_Void_Type);
@@ -1730,16 +1729,15 @@ package body Sem_Aggr is
          while Present (Assoc) loop
             if Nkind (Assoc) = N_Iterated_Component_Association then
                Resolve_Iterated_Component_Association (Assoc, Index_Typ);
-               goto Next_Assoc;
             end if;
 
-            Choice := First (Choices (Assoc));
+            Choice := First (Choice_List (Assoc));
             Delete_Choice := False;
             while Present (Choice) loop
                if Nkind (Choice) = N_Others_Choice then
                   Others_Present := True;
 
-                  if Choice /= First (Choices (Assoc))
+                  if Choice /= First (Choice_List (Assoc))
                     or else Present (Next (Choice))
                   then
                      Error_Msg_N
@@ -1829,7 +1827,6 @@ package body Sem_Aggr is
                end;
             end loop;
 
-            <<Next_Assoc>>
             Next (Assoc);
          end loop;
       end if;

gcc/ada/sem_ch12.adb

@@ -3668,7 +3668,8 @@ package body Sem_Ch12 is
 
       --  Local declarations
 
-      Mode : Ghost_Mode_Type;
+      Mode     : Ghost_Mode_Type;
+      Mode_Set : Boolean := False;
 
       Vis_Prims_List : Elist_Id := No_Elist;
       --  List of primitives made temporarily visible in the instantiation
@@ -3746,6 +3747,7 @@ package body Sem_Ch12 is
       --  Ghost.
 
       Mark_And_Set_Ghost_Instantiation (N, Gen_Unit, Mode);
+      Mode_Set := True;
 
       --  Verify that it is the name of a generic package
 
@@ -4438,7 +4440,9 @@ package body Sem_Ch12 is
          Analyze_Aspect_Specifications (N, Act_Decl_Id);
       end if;
 
-      Restore_Ghost_Mode (Mode);
+      if Mode_Set then
+         Restore_Ghost_Mode (Mode);
+      end if;
 
    exception
       when Instantiation_Error =>
@@ -4455,7 +4459,9 @@ package body Sem_Ch12 is
          SPARK_Mode_Pragma        := Save_SMP;
          Style_Check              := Save_Style_Check;
 
-         Restore_Ghost_Mode (Mode);
+         if Mode_Set then
+            Restore_Ghost_Mode (Mode);
+         end if;
    end Analyze_Package_Instantiation;
 
    --------------------------
@@ -5093,8 +5099,6 @@ package body Sem_Ch12 is
 
       --  Local variables
 
-      Mode : Ghost_Mode_Type;
-
       Save_IPSM : constant Boolean := Ignore_Pragma_SPARK_Mode;
       --  Save flag Ignore_Pragma_SPARK_Mode for restore on exit
 
@@ -5102,6 +5106,9 @@ package body Sem_Ch12 is
       Save_SMP : constant Node_Id         := SPARK_Mode_Pragma;
       --  Save the SPARK_Mode-related data for restore on exit
 
+      Mode     : Ghost_Mode_Type;
+      Mode_Set : Boolean := False;
+
       Vis_Prims_List : Elist_Id := No_Elist;
       --  List of primitives made temporarily visible in the instantiation
       --  to match the visibility of the formal type
@@ -5143,6 +5150,7 @@ package body Sem_Ch12 is
       --  Ghost.
 
       Mark_And_Set_Ghost_Instantiation (N, Gen_Unit, Mode);
+      Mode_Set := True;
 
       Generate_Reference (Gen_Unit, Gen_Id);
 
@@ -5404,7 +5412,9 @@ package body Sem_Ch12 is
          Analyze_Aspect_Specifications (N, Act_Decl_Id);
       end if;
 
-      Restore_Ghost_Mode (Mode);
+      if Mode_Set then
+         Restore_Ghost_Mode (Mode);
+      end if;
 
    exception
       when Instantiation_Error =>
@@ -5420,7 +5430,9 @@ package body Sem_Ch12 is
          SPARK_Mode               := Save_SM;
          SPARK_Mode_Pragma        := Save_SMP;
 
-         Restore_Ghost_Mode (Mode);
+         if Mode_Set then
+            Restore_Ghost_Mode (Mode);
+         end if;
    end Analyze_Subprogram_Instantiation;
 
    -------------------------