76   if (!ModuleScopes.empty() &&  in ActOnGlobalModuleFragmentDecl()
77       ModuleScopes.back().Module->Kind == Module::GlobalModuleFragment) {  in ActOnGlobalModuleFragmentDecl()
82     ModuleScopes.back().BeginLoc = ModuleLoc;  in ActOnGlobalModuleFragmentDecl()
133   ModuleScopes.push_back({}); // No GMF  in HandleStartOfHeaderUnit()
134   ModuleScopes.back().BeginLoc = StartOfTU;  in HandleStartOfHeaderUnit()
135   ModuleScopes.back().Module = Mod;  in HandleStartOfHeaderUnit()
136   ModuleScopes.back().ModuleInterface = true;  in HandleStartOfHeaderUnit()
137   ModuleScopes.back().IsPartition = false;  in HandleStartOfHeaderUnit()
204   assert(ModuleScopes.size() <= 1 && "expected to be at global module scope");  in ActOnModuleDecl()
210   if (!ModuleScopes.empty() &&  in ActOnModuleDecl()
211       ModuleScopes.back().Module->isModulePurview()) {  in ActOnModuleDecl()
213     Diag(VisibleModules.getImportLoc(ModuleScopes.back().Module),  in ActOnModuleDecl()
220   if (!ModuleScopes.empty() &&  in ActOnModuleDecl()
221       ModuleScopes.back().Module->Kind == Module::GlobalModuleFragment)  in ActOnModuleDecl()
222     GlobalModuleFragment = ModuleScopes.back().Module;  in ActOnModuleDecl()
233         ModuleScopes.empty()  in ActOnModuleDecl()
235             : ModuleScopes.back().BeginLoc;  in ActOnModuleDecl()
319     ModuleScopes.push_back({});  in ActOnModuleDecl()
321       ModuleScopes.back().OuterVisibleModules = std::move(VisibleModules);  in ActOnModuleDecl()
328   ModuleScopes.back().BeginLoc = StartLoc;  in ActOnModuleDecl()
329   ModuleScopes.back().Module = Mod;  in ActOnModuleDecl()
330   ModuleScopes.back().ModuleInterface = MDK != ModuleDeclKind::Implementation;  in ActOnModuleDecl()
331   ModuleScopes.back().IsPartition = IsPartition;  in ActOnModuleDecl()
367   switch (ModuleScopes.empty() ? Module::GlobalModuleFragment  in ActOnPrivateModuleFragmentDecl()
368                                : ModuleScopes.back().Module->Kind) {  in ActOnPrivateModuleFragmentDecl()
379     Diag(ModuleScopes.back().BeginLoc, diag::note_previous_definition);  in ActOnPrivateModuleFragmentDecl()
386   if (!ModuleScopes.back().ModuleInterface) {  in ActOnPrivateModuleFragmentDecl()
388     Diag(ModuleScopes.back().BeginLoc,  in ActOnPrivateModuleFragmentDecl()
390         << FixItHint::CreateInsertion(ModuleScopes.back().BeginLoc, "export ");  in ActOnPrivateModuleFragmentDecl()
405           ModuleScopes.back().Module, PrivateLoc);  in ActOnPrivateModuleFragmentDecl()
409   ModuleScopes.push_back({});  in ActOnPrivateModuleFragmentDecl()
410   ModuleScopes.back().BeginLoc = ModuleLoc;  in ActOnPrivateModuleFragmentDecl()
411   ModuleScopes.back().Module = PrivateModuleFragment;  in ActOnPrivateModuleFragmentDecl()
412   ModuleScopes.back().ModuleInterface = true;  in ActOnPrivateModuleFragmentDecl()
441     assert(!ModuleScopes.empty() && "in a module purview, but no module?");  in ActOnModuleImport()
442     Module *NamedMod = ModuleScopes.back().Module;  in ActOnModuleImport()
466         << ModuleName << !ModuleScopes.back().ModuleInterface;  in ActOnModuleImport()
536   if (!ModuleScopes.empty())  in ActOnModuleImport()
537     Context.addModuleInitializer(ModuleScopes.back().Module, Import);  in ActOnModuleImport()
544   } else if (!ModuleScopes.empty() &&  in ActOnModuleImport()
545              (ModuleScopes.back().ModuleInterface ||  in ActOnModuleImport()
547                ModuleScopes.back().Module->isGlobalModule()))) {  in ActOnModuleImport()
548     assert((!ModuleScopes.back().Module->isGlobalModule() ||  in ActOnModuleImport()
563         << (!ModuleScopes.empty() &&  in ActOnModuleImport()
564             !ModuleScopes.back().ImplicitGlobalModuleFragment);  in ActOnModuleImport()
604     if (!ModuleScopes.empty())  in BuildModuleInclude()
605       Context.addModuleInitializer(ModuleScopes.back().Module, ImportD);  in BuildModuleInclude()
624   ModuleScopes.push_back({});  in ActOnModuleBegin()
625   ModuleScopes.back().Module = Mod;  in ActOnModuleBegin()
627     ModuleScopes.back().OuterVisibleModules = std::move(VisibleModules);  in ActOnModuleBegin()
647     VisibleModules = std::move(ModuleScopes.back().OuterVisibleModules);  in ActOnModuleEnd()
653   assert(!ModuleScopes.empty() && ModuleScopes.back().Module == Mod &&  in ActOnModuleEnd()
655   ModuleScopes.pop_back();  in ActOnModuleEnd()
720   if (ModuleScopes.empty() || !ModuleScopes.back().Module->isModulePurview()) {  in ActOnStartExportDecl()
724   } else if (!ModuleScopes.back().ModuleInterface) {  in ActOnStartExportDecl()
726     Diag(ModuleScopes.back().BeginLoc,  in ActOnStartExportDecl()
728         << FixItHint::CreateInsertion(ModuleScopes.back().BeginLoc, "export ");  in ActOnStartExportDecl()
731   } else if (ModuleScopes.back().Module->Kind ==  in ActOnStartExportDecl()
734     Diag(ModuleScopes.back().BeginLoc, diag::note_private_module_fragment);  in ActOnStartExportDecl()
933   ModuleScopes.push_back({BeginLoc, GlobalModuleFragment,  in PushGlobalModuleFragment()
944   assert(!ModuleScopes.empty() && getCurrentModule()->isGlobalModule() &&  in PopGlobalModuleFragment()
946   ModuleScopes.pop_back();  in PopGlobalModuleFragment()