Expand test of C++0x [class.copymove]p15 to make sure we're actually calling the copy constructor of a base/member from an explicitly-defaulted copy constructor, rather than the default constructor

llvm-svn: 137220

clang/test/CXX/special/class.copy/p15-0x.cpp

@@ -8,4 +8,11 @@ namespace PR10622 {
   void find_or_insert(const foo& __obj) {
     foo x(__obj);
   }
+
+  struct bar : foo {
+    bar(const bar&) = default;
+  };
+  void test_bar(const bar &obj) {
+    bar obj2(obj);
+  }
 }