vendor/clang/clang-release_39-r276489

1 files changed, 12 insertions, 0 deletions

diff --git a/test/SemaCXX/varargs.cpp b/test/SemaCXX/varargs.cpp
new file mode 100644
index 000000000000..6a1883786a33
--- /dev/null
+++ b/test/SemaCXX/varargs.cpp
@@ -0,0 +1,12 @@
+// RUN: %clang_cc1 -fsyntax-only -std=c++03 -verify %s
+
+class string;
+void f(const string& s, ...) {  // expected-note {{parameter of type 'const string &' is declared here}}
+  __builtin_va_list ap;
+  __builtin_va_start(ap, s); // expected-warning {{passing an object of reference type to 'va_start' has undefined behavior}}
+}
+
+void g(register int i, ...) {
+  __builtin_va_list ap;
+  __builtin_va_start(ap, i); // okay
+}