Don't diagnose non-modular includes when we are not compiling a module.
This is triggered when we are compiling an implementation of a module,
it has relative includes to a VFS-mapped module with umbrella headers.
Currently we will find the real path to headers under the umbrella directory,
but the umbrella directories are using virtual path.
rdar://27951255
Thanks Ben and Richard for reviewing the patch!
Differential Revision: http://reviews.llvm.org/D23858
llvm-svn: 279838
diff --git a/clang/test/VFS/Inputs/Nonmodular/test.c b/clang/test/VFS/Inputs/Nonmodular/test.c
new file mode 100644
index 0000000..62807d0
--- /dev/null
+++ b/clang/test/VFS/Inputs/Nonmodular/test.c
@@ -0,0 +1,3 @@
+// expected-no-diagnostics
+
+#include "umbrella.h"