1 files changed, 30 insertions, 0 deletions
diff --git a/test/Analysis/Inputs/system-header-simulator-for-valist.h b/test/Analysis/Inputs/system-header-simulator-for-valist.h
new file mode 100644
index 0000000000000..7299b61353d46
--- /dev/null
+++ b/test/Analysis/Inputs/system-header-simulator-for-valist.h
@@ -0,0 +1,30 @@
+// Like the compiler, the static analyzer treats some functions differently if
+// they come from a system header -- for example, it is assumed that system
+// functions do not arbitrarily free() their parameters, and that some bugs
+// found in system headers cannot be fixed by the user and should be
+// suppressed.
+
+#pragma clang system_header
+
+#ifdef __cplusplus
+#define restrict /*restrict*/
+#endif
+
+typedef __builtin_va_list va_list;
+
+#define va_start(ap, param) __builtin_va_start(ap, param)
+#define va_end(ap)          __builtin_va_end(ap)
+#define va_arg(ap, type)    __builtin_va_arg(ap, type)
+#define va_copy(dst, src)   __builtin_va_copy(dst, src)
+
+int vprintf (const char *restrict format, va_list arg);
+
+int vsprintf (char *restrict s, const char *restrict format, va_list arg);
+
+int some_library_function(int n, va_list arg);
+
+// No warning from system header.
+inline void __impl_detail(int fst, ...) {
+  va_list va;
+  (void)va_arg(va, int);
+}