Prepare for using MS ABI by default for Win32: update CodeGenCXX tests

llvm-svn: 197281
diff --git a/clang/test/CodeGenCXX/reference-field.cpp b/clang/test/CodeGenCXX/reference-field.cpp
index 0312029..aa34fa3 100644
--- a/clang/test/CodeGenCXX/reference-field.cpp
+++ b/clang/test/CodeGenCXX/reference-field.cpp
@@ -1,6 +1,8 @@
-// RUN: %clang_cc1 -emit-llvm -o - %s -O2 | grep "@_Z1bv"
+// RUN: %clang_cc1 -emit-llvm -cxx-abi itanium -o - %s -O2 | FileCheck %s
 
 // Make sure the call to b() doesn't get optimized out.
 extern struct x {char& x,y;}y;
 int b();      
 int a() { if (!&y.x) b(); }
+
+// CHECK: @_Z1bv