decl.c (gnat_to_gnu_entity): Create TYPE_DECL for the padded type built to support a specified size or alignment.

* gcc-interface/decl.c (gnat_to_gnu_entity) <object>: Create TYPE_DECL
	for the padded type built to support a specified size or alignment.

From-SVN: r171554

gcc/ada/ChangeLog

@@ -1,3 +1,8 @@
+2011-03-26  Eric Botcazou  <ebotcazou@adacore.com>
+
+	* gcc-interface/decl.c (gnat_to_gnu_entity) <object>: Create TYPE_DECL
+	for the padded type built to support a specified size or alignment.
+
 2011-03-26  Eric Botcazou  <ebotcazou@adacore.com>
 
 	* gcc-interface/gigi.h (finalize_from_with_types): Adjust comment.

gcc/ada/gcc-interface/decl.c

@@ -911,9 +911,20 @@ gnat_to_gnu_entity (Entity_Id gnat_entity, tree gnu_expr, int definition)
 	   size of the object.  */
 	gnu_object_size = gnu_size ? gnu_size : TYPE_SIZE (gnu_type);
 	if (gnu_size || align > 0)
-	  gnu_type = maybe_pad_type (gnu_type, gnu_size, align, gnat_entity,
-				     false, false, definition,
-				     gnu_size ? true : false);
+	  {
+	    tree orig_type = gnu_type;
+
+	    gnu_type = maybe_pad_type (gnu_type, gnu_size, align, gnat_entity,
+				       false, false, definition,
+				       gnu_size ? true : false);
+
+	    /* If a padding record was made, declare it now since it will
+	       never be declared otherwise.  This is necessary to ensure
+	       that its subtrees are properly marked.  */
+	    if (gnu_type != orig_type && !DECL_P (TYPE_NAME (gnu_type)))
+	      create_type_decl (TYPE_NAME (gnu_type), gnu_type, NULL, true,
+				debug_info_p, gnat_entity);
+	  }
 
 	/* If this is a renaming, avoid as much as possible to create a new
 	   object.  However, in several cases, creating it is required.

gcc/testsuite/ChangeLog

@@ -1,3 +1,7 @@
+2011-03-26  Eric Botcazou  <ebotcazou@adacore.com>
+
+	* gnat.dg/discr27.ad[sb]: New test.
+
 2011-03-26  Eric Botcazou  <ebotcazou@adacore.com>
 
 	* gnat.dg/limited_with2.ad[sb]: New test.

gcc/testsuite/gnat.dg/discr27.adb

@@ -0,0 +1,31 @@
+package body Discr27 is
+
+   subtype Index is Positive range 1..4096;
+
+   function F return String is
+      S : String(1..1) := (others =>'w');
+   begin
+      return S;
+   end;
+
+   type Enum is (One, Two);
+
+   type Rec (D : Enum  := One; Len : Index := 1) is record
+      case D is
+          when One => I : Integer;
+          when Two => A : String(1..Len);
+      end case;
+   end record;
+
+   procedure Nothing is
+      M : constant String := F;
+      C : constant Rec := (Two, M'Length, M);
+   begin
+      null;
+   end;
+
+   procedure Proc is begin
+      null;
+   end;
+
+end Discr27;

gcc/testsuite/gnat.dg/discr27.ads

@@ -0,0 +1,7 @@
+-- { dg-do compile }
+
+package Discr27 is
+
+   procedure Proc;
+
+end Discr27;