CHECK-LABEL-ify some code gen tests to improve diagnostic experience when tests fail.

llvm-svn: 188447
diff --git a/clang/test/CodeGenCXX/global-dtor-no-atexit.cpp b/clang/test/CodeGenCXX/global-dtor-no-atexit.cpp
index 7c4b6aa..9d35e84 100644
--- a/clang/test/CodeGenCXX/global-dtor-no-atexit.cpp
+++ b/clang/test/CodeGenCXX/global-dtor-no-atexit.cpp
@@ -22,7 +22,7 @@
 A a, b;
 
 // PR9593
-// CHECK:      define void @_Z4funcv()
+// CHECK-LABEL:      define void @_Z4funcv()
 // CHECK:      call i32 @__cxa_guard_acquire(i64* @_ZGVZ4funcvE2a1)
 // CHECK:      call void @_ZN1AC1Ev([[A]]* @_ZZ4funcvE2a1)
 // CHECK-NEXT: call i32 @atexit(void ()* @__dtor__ZZ4funcvE2a1)