trans.c (Call_to_gnu): Remove guard for NULL_EXPR.

	* gcc-interface/trans.c (Call_to_gnu): Remove guard for NULL_EXPR.
	* gcc-interface/utils2.c (gnat_rewrite_reference) <ERROR_MARK>: Return
	the reference unmodified.
	<NULL_EXPR>: New case.  Likewise.

From-SVN: r231513

gcc/ada/ChangeLog

 2015-12-10  Eric Botcazou  <ebotcazou@adacore.com>
 
+	* gcc-interface/trans.c (Call_to_gnu): Remove guard for NULL_EXPR.
+	* gcc-interface/utils2.c (gnat_rewrite_reference) <ERROR_MARK>: Return
+	the reference unmodified.
+	<NULL_EXPR>: New case.  Likewise.
+
+2015-12-10  Eric Botcazou  <ebotcazou@adacore.com>
+
 	* gcc-interface/gigi.h (create_var_decl): Adjust comment.
 	(create_subprog_decl): Likewise.
 	* gcc-interface/utils.c (create_var_decl): Likewise.

gcc/ada/gcc-interface/trans.c

@@ -4407,9 +4407,7 @@ Call_to_gnu (Node_Id gnat_node, tree *gnu_result_type_p, tree gnu_target,
       /* If it's possible we may need to use this expression twice, make sure
 	 that any side-effects are handled via SAVE_EXPRs; likewise if we need
 	 to force side-effects before the call.  */
-      if (Ekind (gnat_formal) != E_In_Parameter
-	  && !is_by_ref_formal_parm
-	  && TREE_CODE (gnu_name) != NULL_EXPR)
+      if (Ekind (gnat_formal) != E_In_Parameter && !is_by_ref_formal_parm)
 	{
 	  tree init = NULL_TREE;
 	  gnu_name = gnat_stabilize_reference (gnu_name, true, &init);

gcc/ada/gcc-interface/utils2.c

@@ -2733,7 +2733,8 @@ gnat_rewrite_reference (tree ref, rewrite_fn func, void *data, tree *init)
       break;
 
     case ERROR_MARK:
-      return error_mark_node;
+    case NULL_EXPR:
+      return ref;
 
     default:
       gcc_unreachable ();

gcc/testsuite/ChangeLog

+2015-12-10  Eric Botcazou  <ebotcazou@adacore.com>
+
+	* gnat.dg/array25.adb: New test.
+	* gnat.dg/array25_pkg.ad[sb]: New helper.
+
 2015-12-10  Claudiu Zissulescu  <claziss@synopsys.com>
 
 	* lib/target-supports.exp (check_effective_target_arc_atomic): New

gcc/testsuite/gnat.dg/array25.adb

+-- { dg-do compile }
+
+with Array25_Pkg;
+
+procedure Array25 is
+
+   package My_Pkg is new Array25_Pkg (0, 0);
+
+begin
+   null;
+end;

gcc/testsuite/gnat.dg/array25_pkg.adb

+package body Array25_Pkg is
+
+   procedure Get_Inner (A : out Arr1) is
+   begin
+      null;
+   end;
+
+   procedure Get (A : out Arr2) is
+   begin
+      for I in Arr2'Range loop
+         Get_Inner (A (I).Data);
+      end loop;
+   end;
+
+end Array25_Pkg;

gcc/testsuite/gnat.dg/array25_pkg.ads

+generic
+
+   UB1 : Natural;
+
+   UB2 : Natural;
+
+package Array25_Pkg is
+
+   type Arr1 is array (1 .. UB1) of Integer;
+
+   type Rec is record
+      Data : Arr1;
+   end record;
+
+   type Arr2  is array (1 .. UB2) of Rec;
+
+   procedure Get (A : out Arr2);
+
+end Array25_Pkg;