* gcc-interface/gigi.h (standard_datatypes): Add ADT_parent_name_id.

	(parent_name_id): New macro.
	* gcc-interface/decl.c (gnat_to_gnu_entity) <E_Record_Type>: Use it.
	* gcc-interface/trans.c (gigi): Initialize it.
	(lvalue_required_p) <N_Type_Conversion>: New case.
	<N_Qualified_Expression>: Likewise.
	<N_Allocator>: Likewise.
	* gcc-interface/utils.c (convert): Try to properly upcast tagged types.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@158255 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 28 insertions, 0 deletions

diff --git a/gcc/testsuite/gnat.dg/derived_type1.adb b/gcc/testsuite/gnat.dg/derived_type1.adb
new file mode 100644
index 00000000000..c50d5ef466a
--- /dev/null
+++ b/gcc/testsuite/gnat.dg/derived_type1.adb
@@ -0,0 +1,28 @@
+-- { dg-do compile }
+-- { dg-options "-gnatws -fdump-tree-original" }
+
+procedure Derived_Type1 is
+
+  type Root is tagged null record;
+
+  type Derived1 is new Root with record
+    I1 : Integer;
+  end record;
+
+  type Derived2 is new Derived1 with record
+    I2: Integer;
+  end record;
+
+  R : Root;
+  D1 : Derived1;
+  D2 : Derived2;
+
+begin
+  R  := Root(D1);
+  R  := Root(D2);
+  D1 := Derived1(D2);
+end;
+
+-- { dg-final { scan-tree-dump-not "VIEW_CONVERT_EXPR<struct derived_type1__root>" "original" } }
+-- { dg-final { scan-tree-dump-not "VIEW_CONVERT_EXPR<struct derived_type1__derived1>" "original" } }
+-- { dg-final { cleanup-tree-dump "original" } }