decl.c (gnat_to_gnu_entity): Apply special treatment of derived packed array…

decl.c (gnat_to_gnu_entity): Apply special treatment of derived packed array types to constrained subtypes only.

	* gcc-interface/decl.c (gnat_to_gnu_entity): Apply special treatment
	of derived packed array types to constrained subtypes only.

From-SVN: r216727

gcc/ada/ChangeLog

 2014-10-27  Eric Botcazou  <ebotcazou@adacore.com>
 
+	* gcc-interface/decl.c (gnat_to_gnu_entity): Apply special treatment
+	of derived packed array types to constrained subtypes only.
+
+2014-10-27  Eric Botcazou  <ebotcazou@adacore.com>
+
 	* gcc-interface/decl.c (gnat_to_gnu_entity) <E_Array_Type>: Remove
 	superfluous computation for the max size.
 	<E_Array_Subtype>: Likewise.  Make sure that the max size calculation

gcc/ada/gcc-interface/decl.c

@@ -5083,8 +5083,10 @@ gnat_to_gnu_entity (Entity_Id gnat_entity, tree gnu_expr, int definition)
       if (Is_Derived_Type (gnat_entity) && !type_annotate_only)
 	{
 	  Entity_Id gnat_parent_type = Underlying_Type (Etype (gnat_entity));
-	  /* For packed array subtypes, the implementation type is used.  */
+	  /* For constrained packed array subtypes, the implementation type is
+	     used instead of the nominal type.  */
 	  if (kind == E_Array_Subtype
+	      && Is_Constrained (gnat_entity)
 	      && Present (Packed_Array_Impl_Type (gnat_parent_type)))
 	    gnat_parent_type = Packed_Array_Impl_Type (gnat_parent_type);
 	  relate_alias_sets (gnu_type, gnat_to_gnu_type (gnat_parent_type),

gcc/testsuite/ChangeLog

 2014-10-27  Eric Botcazou  <ebotcazou@adacore.com>
 
+	* gnat.dg/specs/pack10.ads: New test.
+	* gnat.dg/specs/pack10_pkg.ad[sb]: New helper.
+
+2014-10-27  Eric Botcazou  <ebotcazou@adacore.com>
+
 	* gnat.dg/entry_queues2.adb: New test.
 
 2014-10-25  Jakub Jelinek  <jakub@redhat.com>

gcc/testsuite/gnat.dg/specs/pack10.ads

+-- { dg-do compile }
+
+with Pack10_Pkg; use Pack10_Pkg;
+
+package Pack10 is
+
+   type Boolean_Vector is array (Positive range <>) of Boolean;
+
+   type Packed_Boolean_Vector is new Boolean_Vector;
+   pragma Pack (Packed_Boolean_Vector);
+
+   procedure My_Proc is new Proc (Packed_Boolean_Vector);
+
+end Pack10;

gcc/testsuite/gnat.dg/specs/pack10_pkg.adb

+package body Pack10_Pkg is
+
+   procedure Proc is begin null; end;
+
+end Pack10_Pkg;

gcc/testsuite/gnat.dg/specs/pack10_pkg.ads

+-- { dg-excess-errors "cannot generate code" }
+
+package Pack10_Pkg is
+
+   generic
+      type Vector_Type (<>) is private;
+   procedure Proc;
+
+end Pack10_Pkg;