2 files changed, 31 insertions, 3 deletions
diff --git a/clang/lib/CodeGen/CodeGenModule.cpp b/clang/lib/CodeGen/CodeGenModule.cpp
index f4628fc0d33..21849590b11 100644
--- a/clang/lib/CodeGen/CodeGenModule.cpp
+++ b/clang/lib/CodeGen/CodeGenModule.cpp
@@ -3951,9 +3951,33 @@ void CodeGenModule::EmitTopLevelDecl(Decl *D) {
         DI->EmitImportDecl(*Import);
     }
 
-    // Emit the module initializers.
-    for (auto *D : Context.getModuleInitializers(Import->getImportedModule()))
-      EmitTopLevelDecl(D);
+    // Find all of the submodules and emit the module initializers.
+    llvm::SmallPtrSet<clang::Module *, 16> Visited;
+    SmallVector<clang::Module *, 16> Stack;
+    Visited.insert(Import->getImportedModule());
+    Stack.push_back(Import->getImportedModule());
+
+    while (!Stack.empty()) {
+      clang::Module *Mod = Stack.pop_back_val();
+      if (!EmittedModuleInitializers.insert(Mod).second)
+        continue;
+
+      for (auto *D : Context.getModuleInitializers(Mod))
+        EmitTopLevelDecl(D);
+
+      // Visit the submodules of this module.
+      for (clang::Module::submodule_iterator Sub = Mod->submodule_begin(),
+                                             SubEnd = Mod->submodule_end();
+           Sub != SubEnd; ++Sub) {
+        // Skip explicit children; they need to be explicitly imported to emit
+        // the initializers.
+        if ((*Sub)->IsExplicit)
+          continue;
+
+        if (Visited.insert(*Sub).second)
+          Stack.push_back(*Sub);
+      }
+    }
     break;
   }
 
diff --git a/clang/lib/CodeGen/CodeGenModule.h b/clang/lib/CodeGen/CodeGenModule.h
index e896b11a7ae..7fb2402d34a 100644
--- a/clang/lib/CodeGen/CodeGenModule.h
+++ b/clang/lib/CodeGen/CodeGenModule.h
@@ -420,6 +420,10 @@ private:
   /// \brief The complete set of modules that has been imported.
   llvm::SetVector<clang::Module *> ImportedModules;
 
+  /// \brief The set of modules for which the module initializers
+  /// have been emitted.
+  llvm::SmallPtrSet<clang::Module *, 16> EmittedModuleInitializers;
+
   /// \brief A vector of metadata strings.
   SmallVector<llvm::Metadata *, 16> LinkerOptionsMetadata;