[modules] If we have a choice between including a file textually and importing
a prebuilt form from a module, prefer the modular form, all else being equal.
llvm-svn: 229188
diff --git a/clang/test/Modules/header-in-multiple-maps.cpp b/clang/test/Modules/header-in-multiple-maps.cpp
new file mode 100644
index 0000000..a9c0c80
--- /dev/null
+++ b/clang/test/Modules/header-in-multiple-maps.cpp
@@ -0,0 +1,9 @@
+// RUN: rm -rf %t
+// RUN: %clang_cc1 -fmodules -fmodules-cache-path=%t -I%S/Inputs/header-in-multiple-maps -fmodule-map-file=%S/Inputs/header-in-multiple-maps/map1 -verify %s
+// RUN: %clang_cc1 -fmodules -fmodules-cache-path=%t -I%S/Inputs/header-in-multiple-maps -fmodule-map-file=%S/Inputs/header-in-multiple-maps/map2 -verify %s
+// RUN: %clang_cc1 -fmodules -fmodules-cache-path=%t -I%S/Inputs/header-in-multiple-maps -fmodule-map-file=%S/Inputs/header-in-multiple-maps/map3 -verify %s
+// expected-no-diagnostics
+
+#include "a.h"
+#include "a.h"
+A *p;