Add comments to debug info testing case.
llvm-svn: 214472
diff --git a/clang/test/CodeGenCXX/debug-info-varargs.cpp b/clang/test/CodeGenCXX/debug-info-varargs.cpp
index 6318650..491b97d 100644
--- a/clang/test/CodeGenCXX/debug-info-varargs.cpp
+++ b/clang/test/CodeGenCXX/debug-info-varargs.cpp
@@ -5,6 +5,7 @@
// CHECK-DAG: ", i32 [[@LINE+1]], metadata ![[ATY:[0-9]+]]{{.*}}[ DW_TAG_subprogram ]{{.*}}[a]
void a(int c, ...) {}
// CHECK: ![[ATY]] ={{.*}} metadata ![[AARGS:[0-9]+]], i32 0, null, null, null} ; [ DW_TAG_subroutine_type ]
+ // We no longer use an explicit unspecified parameter. Instead we use a trailing null to mean the function is variadic.
// CHECK: ![[AARGS]] = metadata !{null, metadata !{{[0-9]+}}, metadata !{{[0-9]+}}, null}
};