PR c++/27292

	* tree.c (rvalue): Convert bitfields to their declared types.
	PR c++/27292
	* g++.dg/conversion/bitfield4.C: New test.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@113339 138bc75d-0d04-0410-961f-82ee72b054a4

4 files changed, 31 insertions, 2 deletions

diff --git a/gcc/cp/ChangeLog b/gcc/cp/ChangeLog
index aece2e85da0..17e3b291c21 100644
--- a/gcc/cp/ChangeLog
+++ b/gcc/cp/ChangeLog
@@ -1,5 +1,8 @@
 2006-04-27  Mark Mitchell  <mark@codesourcery.com>
 
+	PR c++/27292
+	* tree.c (rvalue): Convert bitfields to their declared types.
+
 	PR c++/27102
 	* typeck2.c (cxx_incomplete_type_diagnostic): Handle
 	TYPENAME_TYPE.
diff --git a/gcc/cp/tree.c b/gcc/cp/tree.c
index a956205a136..60ba13f9936 100644
--- a/gcc/cp/tree.c
+++ b/gcc/cp/tree.c
@@ -372,8 +372,9 @@ rvalue (tree expr)
   if (real_lvalue_p (expr))
     {
       type = is_bitfield_expr_with_lowered_type (expr);
-      if (!type)
-	type = TREE_TYPE (expr);
+      if (type)
+	return cp_convert (TYPE_MAIN_VARIANT (type), expr);
+      type = TREE_TYPE (expr);
       /* [basic.lval]
 	 
          Non-class rvalues always have cv-unqualified types.  */
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 5ae38b0e723..c8fc07c4798 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2006-04-27  Mark Mitchell  <mark@codesourcery.com>
+
+	PR c++/27292
+	* g++.dg/conversion/bitfield4.C: New test.
+
 2006-04-27  Eric Christopher  <echristo@apple.com>
 
 	* gcc.dg/pragma-ms_struct.c: New.
diff --git a/gcc/testsuite/g++.dg/conversion/bitfield4.C b/gcc/testsuite/g++.dg/conversion/bitfield4.C
new file mode 100644
index 00000000000..75fe3016e14
--- /dev/null
+++ b/gcc/testsuite/g++.dg/conversion/bitfield4.C
@@ -0,0 +1,20 @@
+// PR c++/27292
+
+enum ColorRole
+{
+  WindowText, Button
+};
+
+struct QPalette {
+
+ColorRole bg_role:8;
+
+ bool hasBackground();
+};
+
+
+bool
+QPalette::hasBackground ()
+{
+  return (ColorRole (bg_role) != WindowText);
+}