1 files changed, 13 insertions, 0 deletions
diff --git a/clang/lib/Frontend/CompilerInstance.cpp b/clang/lib/Frontend/CompilerInstance.cpp
index 2dac20bcb0f..ee8c4032caf 100644
--- a/clang/lib/Frontend/CompilerInstance.cpp
+++ b/clang/lib/Frontend/CompilerInstance.cpp
@@ -1331,6 +1331,19 @@ bool CompilerInstance::loadModuleFile(StringRef FileName) {
     }
   } RMN(*this);
 
+  // If we don't already have an ASTReader, create one now.
+  if (!ModuleManager)
+    createModuleManager();
+
+  // Tell the module manager about this module file.
+  if (getModuleManager()->getModuleManager().addKnownModuleFile(FileName)) {
+    getDiagnostics().Report(SourceLocation(), diag::err_module_file_not_found)
+      << FileName;
+    return false;
+  }
+
+  // Build our mapping of module names to module files from this file
+  // and its imports.
   RMN.visitImport(FileName);
 
   if (RMN.Failed)