PR c++/15401:

	* c-valprint.c (c_value_print): Use value_addr for
	references.  Convert back to reference type with value_ref.
gdb/testsuite
	* gdb.cp/class2.cc (main): New local 'aref'.
	* gdb.cp/class2.exp: Check printing of 'aref'.

5 files changed, 28 insertions, 12 deletions

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index bc787a7..3b2551b 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,9 @@
+2013-05-22  Tom Tromey  <tromey@redhat.com>
+
+	PR c++/15401:
+	* c-valprint.c (c_value_print): Use value_addr for
+	references.  Convert back to reference type with value_ref.
+
 2013-05-22  Eli Zaretskii  <eliz@gnu.org>
 
 	* windows-nat.c (handle_unload_dll): Don't call solib_add for the
diff --git a/gdb/c-valprint.c b/gdb/c-valprint.c
index 646aed7..ce2c29d 100644
--- a/gdb/c-valprint.c
+++ b/gdb/c-valprint.c
@@ -497,18 +497,11 @@ c_value_print (struct value *val, struct ui_file *stream,
       else if (options->objectprint
 	       && (TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_CLASS))
 	{
+	  int is_ref = TYPE_CODE (type) == TYPE_CODE_REF;
+
+	  if (is_ref)
+	    val = value_addr (val);
 
-	  if (TYPE_CODE(type) == TYPE_CODE_REF)
-	    {
-	      /* Copy value, change to pointer, so we don't get an
-	         error about a non-pointer type in
-	         value_rtti_target_type.  */
-	      struct value *temparg;
-	      temparg=value_copy(val);
-	      deprecated_set_value_type
-		(temparg, lookup_pointer_type (TYPE_TARGET_TYPE (type)));
-	      val = temparg;
-	    }
 	  /* Pointer to class, check real type of object.  */
 	  fprintf_filtered (stream, "(");
 
@@ -522,7 +515,14 @@ c_value_print (struct value *val, struct ui_file *stream,
 		  type = real_type;
 
 		  /* Need to adjust pointer value.  */
-		  val = value_from_pointer (type, value_as_address (val) - top);
+		  val = value_from_pointer (real_type,
+					    value_as_address (val) - top);
+
+		  if (is_ref)
+		    {
+		      val = value_ref (value_ind (val));
+		      type = value_type (val);
+		    }
 
 		  /* Note: When we look up RTTI entries, we don't get
 		     any information on const or volatile
diff --git a/gdb/testsuite/ChangeLog b/gdb/testsuite/ChangeLog
index 300eb75..7429c35 100644
--- a/gdb/testsuite/ChangeLog
+++ b/gdb/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2013-05-22  Tom Tromey  <tromey@redhat.com>
+
+	* gdb.cp/class2.cc (main): New local 'aref'.
+	* gdb.cp/class2.exp: Check printing of 'aref'.
+
 2013-05-22  Doug Evans  <dje@google.com>
 
 	* gdb.threads/wp-replication.c (main): Insert some code at the start
diff --git a/gdb/testsuite/gdb.cp/class2.cc b/gdb/testsuite/gdb.cp/class2.cc
index 0c9d9df..97c44de 100644
--- a/gdb/testsuite/gdb.cp/class2.cc
+++ b/gdb/testsuite/gdb.cp/class2.cc
@@ -67,6 +67,7 @@ int main (void)
   B beta, *bbp;
   C gamma;
   empty e;
+  A &aref (alpha);
 
   alpha.a1 = 100;
   beta.a1 = 200; beta.b1 = 201; beta.b2 = 202;
diff --git a/gdb/testsuite/gdb.cp/class2.exp b/gdb/testsuite/gdb.cp/class2.exp
index 824f56e..00b6322 100644
--- a/gdb/testsuite/gdb.cp/class2.exp
+++ b/gdb/testsuite/gdb.cp/class2.exp
@@ -110,3 +110,7 @@ gdb_test_no_output "set print object on"
 gdb_test "p acp" "= \\(C \\*\\) ${hex}"
 gdb_test "p acp->c1" "\\(A \\*\\) 0x0"
 gdb_test "p acp->c2" "\\(A \\*\\) ${hex}f"
+
+# Regression test for PR c++/15401.
+# Check that the type printed is a reference.
+gdb_test "p aref" " = \\(A \\&\\) .*"