decl.c (gnat_to_gnu_entity): Look at the underlying type for the signedness of the type.

	* gcc-interface/decl.c (gnat_to_gnu_entity) <E_Signed_Integer_Subtype>:
	Look at the underlying type for the signedness of the type.

From-SVN: r242361

gcc/ada/ChangeLog

 2016-11-13  Eric Botcazou  <ebotcazou@adacore.com>
 
+	* gcc-interface/decl.c (gnat_to_gnu_entity) <E_Signed_Integer_Subtype>:
+	Look at the underlying type for the signedness of the type.
+
+2016-11-13  Eric Botcazou  <ebotcazou@adacore.com>
+
 	* gcc-interface/decl.c (annotate_value) <INTEGER_CST>: Deal specially
 	with negative constants.
 

gcc/ada/gcc-interface/decl.c

@@ -1836,7 +1836,7 @@ gnat_to_gnu_entity (Entity_Id gnat_entity, tree gnu_expr, bool definition)
 	  && esize == CHAR_TYPE_SIZE
 	  && flag_signed_char)
 	gnu_type = make_signed_type (CHAR_TYPE_SIZE);
-      else if (Is_Unsigned_Type (Etype (gnat_entity))
+      else if (Is_Unsigned_Type (Underlying_Type (Etype (gnat_entity)))
 	       || (Esize (Etype (gnat_entity)) != Esize (gnat_entity)
 		   && Is_Unsigned_Type (gnat_entity))
 	       || Has_Biased_Representation (gnat_entity))

gcc/testsuite/ChangeLog

 2016-11-13  Eric Botcazou  <ebotcazou@adacore.com>
 
+	* gnat.dg/address_conv.adb: New test.
+
+2016-11-13  Eric Botcazou  <ebotcazou@adacore.com>
+
 	* gnat.dg/renaming11.ad[sb]: New test.
 
 2016-11-13  Eric Botcazou  <ebotcazou@adacore.com>

gcc/testsuite/gnat.dg/address_conv.adb

+--  { dg-do compile }
+
+with System.Storage_Elements; use System.Storage_Elements;
+
+procedure Address_Conv is
+
+  subtype My_Address is System.Address;
+
+  type Rec is record
+    A : My_Address;
+  end record;
+
+  Addr : constant My_Address := To_Address (16#FACEFACE#);
+
+  R : constant Rec := (A => Addr);
+
+begin
+  null;
+end;