Differential D51789 Diff 165768 clang/test/CodeGenCXX/attr-exclude_from_explicit_instantiation.dont_assume_extern_instantiation.cpp

Changeset View

Standalone View

View Options

clang/test/CodeGenCXX/attr-exclude_from_explicit_instantiation.dont_assume_extern_instantiation.cpp

This file was added.

				// RUN: %clang_cc1 -triple x86_64-unknown-unknown -emit-llvm -O0 -o - %s \| FileCheck %s

				// Test that we do not assume that entities marked with the
				// exclude_from_explicit_instantiation attribute are instantiated
				// in another TU when an extern template instantiation declaration
				// is present. We test that by making sure that definitions are
				// generated in this TU despite there being an extern template
				// instantiation declaration, which is normally not the case.

				#define EXCLUDE_FROM_EXPLICIT_INSTANTIATION __attribute__((exclude_from_explicit_instantiation))

				template <class T>
				struct Foo {
				EXCLUDE_FROM_EXPLICIT_INSTANTIATION inline void non_static_member_function1();
				EXCLUDE_FROM_EXPLICIT_INSTANTIATION void non_static_member_function2();

				EXCLUDE_FROM_EXPLICIT_INSTANTIATION static inline void static_member_function1();
				EXCLUDE_FROM_EXPLICIT_INSTANTIATION static void static_member_function2();

				EXCLUDE_FROM_EXPLICIT_INSTANTIATION static int static_data_member;

				struct EXCLUDE_FROM_EXPLICIT_INSTANTIATION member_class1 {
				static void static_member_function() { }
				};

				struct member_class2 {
				EXCLUDE_FROM_EXPLICIT_INSTANTIATION static void static_member_function() { }
				};
				};

				template <class T> inline void Foo<T>::non_static_member_function1() { }
				template <class T> void Foo<T>::non_static_member_function2() { }

				template <class T> inline void Foo<T>::static_member_function1() { }
				template <class T> void Foo<T>::static_member_function2() { }

				template <class T> int Foo<T>::static_data_member = 0;

				extern template struct Foo<int>;

				void use() {
				Foo<int> f;

				// An inline non-static member function marked with the attribute is not
				// part of the extern template declaration, so a definition must be emitted
				// in this TU.
				// CHECK-DAG: define linkonce_odr void @_ZN3FooIiE27non_static_member_function1Ev
				f.non_static_member_function1();

				// A non-inline non-static member function marked with the attribute is
				// not part of the extern template declaration, so a definition must be
				// emitted in this TU.
				// CHECK-DAG: define linkonce_odr void @_ZN3FooIiE27non_static_member_function2Ev
				f.non_static_member_function2();

				// An inline static member function marked with the attribute is not
				// part of the extern template declaration, so a definition must be
				// emitted in this TU.
				// CHECK-DAG: define linkonce_odr void @_ZN3FooIiE23static_member_function1Ev
				Foo<int>::static_member_function1();

				// A non-inline static member function marked with the attribute is not
				// part of the extern template declaration, so a definition must be
				// emitted in this TU.
				// CHECK-DAG: define linkonce_odr void @_ZN3FooIiE23static_member_function2Ev
				Foo<int>::static_member_function2();

				// A static data member marked with the attribute is not part of the
				// extern template declaration, so a definition must be emitted in this TU.
				// CHECK-DAG: @_ZN3FooIiE18static_data_memberE = linkonce_odr global
				int& odr_use = Foo<int>::static_data_member;

				// A member class marked with the attribute is not part of the extern
				// template declaration (it is not recursively instantiated), so its member
				// functions must be emitted in this TU.
				// CHECK-DAG: define linkonce_odr void @_ZN3FooIiE13member_class122static_member_functionEv
				Foo<int>::member_class1::static_member_function();

				// A member function marked with the attribute in a member class is not
				// part of the extern template declaration of the parent class template, so
				// it must be emitted in this TU.
				// CHECK-DAG: define linkonce_odr void @_ZN3FooIiE13member_class222static_member_functionEv
				Foo<int>::member_class2::static_member_function();
				}