libstdc++ 4.2 also uses __is_same as a struct name, which conflicts with our new type trait __is_same

llvm-svn: 130468
diff --git a/clang/test/SemaCXX/libstdcxx_is_pod_hack.cpp b/clang/test/SemaCXX/libstdcxx_is_pod_hack.cpp
index 3cc476d..01f0532 100644
--- a/clang/test/SemaCXX/libstdcxx_is_pod_hack.cpp
+++ b/clang/test/SemaCXX/libstdcxx_is_pod_hack.cpp
@@ -12,6 +12,13 @@
 
 __is_pod<int> ipi;
 
+// Ditto for __is_same.
+template<typename T>
+struct __is_same {
+};
+
+__is_same<int> ipi;
+
 // Another, similar egregious hack for __is_signed, which is a type
 // trait in Embarcadero's compiler but is used as an identifier in
 // libstdc++.