From 92e22794bd6e14bb2c646fb2add31d2ea3356803 Mon Sep 17 00:00:00 2001
From: Vassil Vassilev <v.g.vassilev@gmail.com>
Date: Tue, 24 Oct 2017 14:52:35 +0000
Subject: [PATCH] [modules] Add a regression test for merging anon decls in
 extern C contexts.

llvm-svn: 316444
---
 clang/test/Modules/merge-anon-in-extern_c.cpp | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)
 create mode 100644 clang/test/Modules/merge-anon-in-extern_c.cpp

diff --git a/clang/test/Modules/merge-anon-in-extern_c.cpp b/clang/test/Modules/merge-anon-in-extern_c.cpp
new file mode 100644
index 0000000..1443251
--- /dev/null
+++ b/clang/test/Modules/merge-anon-in-extern_c.cpp
@@ -0,0 +1,19 @@
+// RUN: rm -rf %t
+// RUN: %clang_cc1 -fmodules -fmodules-cache-path=%t -verify %s
+// expected-no-diagnostics
+
+#pragma clang module build sys_types
+module sys_types {}
+#pragma clang module contents
+#pragma clang module begin sys_types
+extern "C" {
+  typedef union { bool b; } pthread_mutex_t;
+}
+#pragma clang module end
+#pragma clang module endbuild
+
+typedef union { bool b; } pthread_mutex_t;
+#pragma clang module import sys_types
+
+const pthread_mutex_t *m;
+
-- 
2.7.4