[Modules] Support #import when entering files with modules

Textual headers and builtins that are #import'd from different
modules should get re-entered when these modules are independent
from each other.

Differential Revision: https://reviews.llvm.org/D26267

rdar://problem/25881934

llvm-svn: 291644

1 files changed, 8 insertions, 0 deletions

diff --git a/clang/test/Modules/Inputs/libc-libcxx/sysroot/usr/include/module.modulemap b/clang/test/Modules/Inputs/libc-libcxx/sysroot/usr/include/module.modulemap
index 7244cb0987e..25b9468d291 100644
--- a/clang/test/Modules/Inputs/libc-libcxx/sysroot/usr/include/module.modulemap
+++ b/clang/test/Modules/Inputs/libc-libcxx/sysroot/usr/include/module.modulemap
@@ -5,4 +5,12 @@ module libc [no_undeclared_includes] {
   module stdint { header "stdint.h" export * }
   module stdio { header "stdio.h" export * }
   module util { header "util.h" export * }
+  module POSIX {
+    module sys {
+      module types {
+        umbrella header "sys/_types/_types.h"
+        export *
+      }
+    }
+  }
 }