125   ModuleScopes.push_back({}); // No GMF  in HandleStartOfHeaderUnit()
126   ModuleScopes.back().BeginLoc = StartOfTU;  in HandleStartOfHeaderUnit()
127   ModuleScopes.back().Module = Mod;  in HandleStartOfHeaderUnit()
228   assert(ModuleScopes.size() <= 1 && "expected to be at global module scope");  in ActOnModuleDecl()
236     Diag(VisibleModules.getImportLoc(ModuleScopes.back().Module),  in ActOnModuleDecl()
250         ModuleScopes.empty()  in ActOnModuleDecl()
252             : ModuleScopes.back().BeginLoc;  in ActOnModuleDecl()
366     ModuleScopes.push_back({});  in ActOnModuleDecl()
368       ModuleScopes.back().OuterVisibleModules = std::move(VisibleModules);  in ActOnModuleDecl()
375   ModuleScopes.back().BeginLoc = StartLoc;  in ActOnModuleDecl()
376   ModuleScopes.back().Module = Mod;  in ActOnModuleDecl()
409     Context.addModuleInitializer(ModuleScopes.back().Module, Import);  in ActOnModuleDecl()
427   switch (ModuleScopes.empty() ? Module::ExplicitGlobalModuleFragment  in ActOnPrivateModuleFragmentDecl()
428                                : ModuleScopes.back().Module->Kind) {  in ActOnPrivateModuleFragmentDecl()
440     Diag(ModuleScopes.back().BeginLoc, diag::note_previous_definition);  in ActOnPrivateModuleFragmentDecl()
445     Diag(ModuleScopes.back().BeginLoc,  in ActOnPrivateModuleFragmentDecl()
447         << FixItHint::CreateInsertion(ModuleScopes.back().BeginLoc, "export ");  in ActOnPrivateModuleFragmentDecl()
464           ModuleScopes.back().Module, PrivateLoc);  in ActOnPrivateModuleFragmentDecl()
468   ModuleScopes.push_back({});  in ActOnPrivateModuleFragmentDecl()
469   ModuleScopes.back().BeginLoc = ModuleLoc;  in ActOnPrivateModuleFragmentDecl()
470   ModuleScopes.back().Module = PrivateModuleFragment;  in ActOnPrivateModuleFragmentDecl()
498     assert(!ModuleScopes.empty() && "in a module purview, but no module?");  in ActOnModuleImport()
499     Module *NamedMod = ModuleScopes.back().Module;  in ActOnModuleImport()
602   if (!ModuleScopes.empty())  in ActOnModuleImport()
603     Context.addModuleInitializer(ModuleScopes.back().Module, Import);  in ActOnModuleImport()
610   } else if (!ModuleScopes.empty() && !currentModuleIsImplementation()) {  in ActOnModuleImport()
650     if (!ModuleScopes.empty())  in BuildModuleInclude()
651       Context.addModuleInitializer(ModuleScopes.back().Module, ImportD);  in BuildModuleInclude()
670   ModuleScopes.push_back({});  in ActOnModuleBegin()
671   ModuleScopes.back().Module = Mod;  in ActOnModuleBegin()
673     ModuleScopes.back().OuterVisibleModules = std::move(VisibleModules);  in ActOnModuleBegin()
693     VisibleModules = std::move(ModuleScopes.back().OuterVisibleModules);  in ActOnModuleEnd()
699   assert(!ModuleScopes.empty() && ModuleScopes.back().Module == Mod &&  in ActOnModuleEnd()
701   ModuleScopes.pop_back();  in ActOnModuleEnd()
772     Diag(ModuleScopes.back().BeginLoc,  in ActOnStartExportDecl()
774         << FixItHint::CreateInsertion(ModuleScopes.back().BeginLoc, "export ");  in ActOnStartExportDecl()
777   } else if (ModuleScopes.back().Module->Kind ==  in ActOnStartExportDecl()
780     Diag(ModuleScopes.back().BeginLoc, diag::note_private_module_fragment);  in ActOnStartExportDecl()
929   ModuleScopes.push_back({BeginLoc, TheGlobalModuleFragment,  in PushGlobalModuleFragment()
937   assert(!ModuleScopes.empty() &&  in PopGlobalModuleFragment()
940   ModuleScopes.pop_back();  in PopGlobalModuleFragment()
953   ModuleScopes.push_back({BeginLoc, TheImplicitGlobalModuleFragment,  in PushImplicitGlobalModuleFragment()
960   assert(!ModuleScopes.empty() &&  in PopImplicitGlobalModuleFragment()
963   ModuleScopes.pop_back();  in PopImplicitGlobalModuleFragment()