3 files changed, 189 insertions, 0 deletions
diff --git a/test/CXX/modules-ts/basic/basic.def.odr/p4/module.cpp b/test/CXX/modules-ts/basic/basic.def.odr/p4/module.cpp
new file mode 100644
index 0000000000000..dc6a3635a8eec
--- /dev/null
+++ b/test/CXX/modules-ts/basic/basic.def.odr/p4/module.cpp
@@ -0,0 +1,46 @@
+// RUN: %clang_cc1 -fmodules-ts %S/module.cppm -triple %itanium_abi_triple -emit-module-interface -o %t
+// RUN: %clang_cc1 -fmodules-ts %s -triple %itanium_abi_triple -fmodule-file=%t -emit-llvm -o - | FileCheck %s --implicit-check-not=unused --implicit-check-not=global_module
+
+// CHECK-DAG: @extern_var_exported = external global
+// FIXME: Should this be 'external global'?
+// CHECK-DAG: @inline_var_exported = linkonce_odr global
+// CHECK-DAG: @_ZL19static_var_exported = external global
+// CHECK-DAG: @const_var_exported = external constant
+//
+// FIXME: The module name should be mangled into all of these.
+// CHECK-DAG: @extern_var_module_linkage = external global
+// FIXME: Should this be 'external global'?
+// CHECK-DAG: @inline_var_module_linkage = linkonce_odr global
+// CHECK-DAG: @_ZL25static_var_module_linkage = external global
+// CHECK-DAG: @_ZL24const_var_module_linkage = external constant
+
+module Module;
+
+void use() {
+  // CHECK: define linkonce_odr {{.*}}@_Z20used_inline_exportedv
+  used_inline_exported();
+  // CHECK: declare {{.*}}@_Z18noninline_exportedv
+  noninline_exported();
+
+  (void)&extern_var_exported;
+  (void)&inline_var_exported;
+  (void)&static_var_exported; // FIXME: Should not be exported.
+  (void)&const_var_exported;
+
+  // FIXME: This symbol should not be visible here.
+  // CHECK: declare {{.*}}@_ZL26used_static_module_linkagev
+  used_static_module_linkage();
+
+  // FIXME: The module name should be mangled into the name of this function.
+  // CHECK: define linkonce_odr {{.*}}@_Z26used_inline_module_linkagev
+  used_inline_module_linkage();
+
+  // FIXME: The module name should be mangled into the name of this function.
+  // CHECK: declare {{.*}}@_Z24noninline_module_linkagev
+  noninline_module_linkage();
+
+  (void)&extern_var_module_linkage;
+  (void)&inline_var_module_linkage;
+  (void)&static_var_module_linkage; // FIXME: Should not be visible here.
+  (void)&const_var_module_linkage;
+}
diff --git a/test/CXX/modules-ts/basic/basic.def.odr/p4/module.cppm b/test/CXX/modules-ts/basic/basic.def.odr/p4/module.cppm
new file mode 100644
index 0000000000000..d452f741a0fb8
--- /dev/null
+++ b/test/CXX/modules-ts/basic/basic.def.odr/p4/module.cppm
@@ -0,0 +1,118 @@
+// RUN: %clang_cc1 -fmodules-ts %s -triple %itanium_abi_triple -emit-llvm -o - | FileCheck %s --implicit-check-not unused_inline --implicit-check-not unused_stastic_global_module
+
+// CHECK-DAG: @extern_var_global_module = external global
+// CHECK-DAG: @inline_var_global_module = linkonce_odr global
+// CHECK-DAG: @_ZL24static_var_global_module = internal global
+// CHECK-DAG: @_ZL23const_var_global_module = internal constant
+//
+// For ABI compatibility, these symbols do not include the module name.
+// CHECK-DAG: @extern_var_exported = external global
+// FIXME: Should this be 'weak_odr global'? Presumably it must be, since we
+// can discard this global and its initializer (if any), and other TUs are not
+// permitted to run the initializer for this variable.
+// CHECK-DAG: @inline_var_exported = linkonce_odr global
+// CHECK-DAG: @_ZL19static_var_exported = global
+// CHECK-DAG: @const_var_exported = constant
+//
+// FIXME: The module name should be mangled into all of these.
+// CHECK-DAG: @extern_var_module_linkage = external global
+// FIXME: Should this be 'weak_odr global'? Presumably it must be, since we
+// can discard this global and its initializer (if any), and other TUs are not
+// permitted to run the initializer for this variable.
+// CHECK-DAG: @inline_var_module_linkage = linkonce_odr global
+// CHECK-DAG: @_ZL25static_var_module_linkage = global
+// CHECK-DAG: @_ZL24const_var_module_linkage = constant
+
+static void unused_static_global_module() {}
+static void used_static_global_module() {}
+
+inline void unused_inline_global_module() {}
+inline void used_inline_global_module() {}
+
+extern int extern_var_global_module;
+inline int inline_var_global_module;
+static int static_var_global_module;
+const int const_var_global_module = 3;
+
+// CHECK: define void {{.*}}@_Z23noninline_global_modulev
+void noninline_global_module() {
+  // FIXME: This should be promoted to module linkage and given a
+  // module-mangled name, if it's called from an inline function within
+  // the module interface.
+  // (We should try to avoid this when it's not reachable from outside
+  // the module interface unit.)
+  // CHECK: define internal {{.*}}@_ZL25used_static_global_modulev
+  used_static_global_module();
+  // CHECK: define linkonce_odr {{.*}}@_Z25used_inline_global_modulev
+  used_inline_global_module();
+
+  (void)&extern_var_global_module;
+  (void)&inline_var_global_module;
+  (void)&static_var_global_module;
+  (void)&const_var_global_module;
+}
+
+export module Module;
+
+export {
+  // FIXME: These should be ill-formed: you can't export an internal linkage
+  // symbol, per [dcl.module.interface]p2.
+  // CHECK: define void {{.*}}@_ZL22unused_static_exportedv
+  static void unused_static_exported() {}
+  // CHECK: define void {{.*}}@_ZL20used_static_exportedv
+  static void used_static_exported() {}
+
+  inline void unused_inline_exported() {}
+  inline void used_inline_exported() {}
+
+  extern int extern_var_exported;
+  inline int inline_var_exported;
+  // FIXME: This should be ill-formed: you can't export an internal linkage
+  // symbol.
+  static int static_var_exported;
+  const int const_var_exported = 3;
+
+  // CHECK: define void {{.*}}@_Z18noninline_exportedv
+  void noninline_exported() {
+    used_static_exported();
+    // CHECK: define linkonce_odr {{.*}}@_Z20used_inline_exportedv
+    used_inline_exported();
+
+    (void)&extern_var_exported;
+    (void)&inline_var_exported;
+    (void)&static_var_exported;
+    (void)&const_var_exported;
+  }
+}
+
+// FIXME: Ideally we wouldn't emit this as its name is not visible outside this
+// TU, but this module interface might contain a template that can use this
+// function so we conservatively emit it for now.
+// FIXME: The module name should be mangled into the name of this function.
+// CHECK: define void {{.*}}@_ZL28unused_static_module_linkagev
+static void unused_static_module_linkage() {}
+// FIXME: The module name should be mangled into the name of this function.
+// CHECK: define void {{.*}}@_ZL26used_static_module_linkagev
+static void used_static_module_linkage() {}
+
+inline void unused_inline_module_linkage() {}
+inline void used_inline_module_linkage() {}
+
+extern int extern_var_module_linkage;
+inline int inline_var_module_linkage;
+static int static_var_module_linkage;
+const int const_var_module_linkage = 3;
+
+// FIXME: The module name should be mangled into the name of this function.
+// CHECK: define void {{.*}}@_Z24noninline_module_linkagev
+void noninline_module_linkage() {
+  used_static_module_linkage();
+  // FIXME: The module name should be mangled into the name of this function.
+  // CHECK: define linkonce_odr {{.*}}@_Z26used_inline_module_linkagev
+  used_inline_module_linkage();
+
+  (void)&extern_var_module_linkage;
+  (void)&inline_var_module_linkage;
+  (void)&static_var_module_linkage;
+  (void)&const_var_module_linkage;
+}
diff --git a/test/CXX/modules-ts/basic/basic.def.odr/p4/user.cpp b/test/CXX/modules-ts/basic/basic.def.odr/p4/user.cpp
new file mode 100644
index 0000000000000..f6e0238c6b4bc
--- /dev/null
+++ b/test/CXX/modules-ts/basic/basic.def.odr/p4/user.cpp
@@ -0,0 +1,25 @@
+// RUN: %clang_cc1 -fmodules-ts %S/module.cppm -triple %itanium_abi_triple -emit-module-interface -o %t
+// RUN: %clang_cc1 -fmodules-ts %s -triple %itanium_abi_triple -fmodule-file=%t -emit-llvm -o - | FileCheck %s --implicit-check-not=unused --implicit-check-not=global_module
+
+// CHECK-DAG: @extern_var_exported = external global
+// FIXME: Should this be 'external global'?
+// CHECK-DAG: @inline_var_exported = linkonce_odr global
+// FIXME: These should be 'extern global' and 'extern constant'.
+// CHECK-DAG: @_ZL19static_var_exported = global
+// CHECK-DAG: @const_var_exported = constant
+
+import Module;
+
+void use() {
+  // CHECK: define linkonce_odr {{.*}}@_Z20used_inline_exportedv
+  used_inline_exported();
+  // CHECK: declare {{.*}}@_Z18noninline_exportedv
+  noninline_exported();
+
+  (void)&extern_var_exported;
+  (void)&inline_var_exported;
+  (void)&static_var_exported;
+  (void)&const_var_exported;
+
+  // Module-linkage declarations are not visible here.
+}