1 files changed, 60 insertions, 0 deletions
diff --git a/clang/test/AST/ByteCode/cxx2a.cpp b/clang/test/AST/ByteCode/cxx2a.cpp
index eaae978..f600688 100644
--- a/clang/test/AST/ByteCode/cxx2a.cpp
+++ b/clang/test/AST/ByteCode/cxx2a.cpp
@@ -110,3 +110,63 @@ namespace DtorOrder {
   }
   static_assert(check_abnormal_termination());
 }
+
+namespace std {
+  struct type_info;
+}
+
+namespace TypeId {
+  struct A {
+    const std::type_info &ti = typeid(*this);
+  };
+  struct A2 : A {};
+  static_assert(&A().ti == &typeid(A));
+  static_assert(&typeid((A2())) == &typeid(A2));
+  extern A2 extern_a2;
+  static_assert(&typeid(extern_a2) == &typeid(A2));
+
+  constexpr A2 a2;
+  constexpr const A &a1 = a2;
+  static_assert(&typeid(a1) == &typeid(A));
+
+  struct B {
+    virtual void f();
+    const std::type_info &ti1 = typeid(*this);
+  };
+  struct B2 : B {
+    const std::type_info &ti2 = typeid(*this);
+  };
+  static_assert(&B2().ti1 == &typeid(B));
+  static_assert(&B2().ti2 == &typeid(B2));
+  extern B2 extern_b2;
+  static_assert(&typeid(extern_b2) == &typeid(B2)); // both-error {{constant expression}} \
+                                                    // both-note{{typeid applied to object 'extern_b2' whose dynamic type is not constant}}
+
+
+  constexpr B2 b2;
+  constexpr const B &b1 = b2;
+  static_assert(&typeid(b1) == &typeid(B2));
+
+  constexpr bool side_effects() {
+    // Not polymorphic nor a glvalue.
+    bool OK = true;
+    (void)typeid(OK = false, A2()); // both-warning {{has no effect}}
+    if (!OK) return false;
+
+    // Not polymorphic.
+    A2 a2;
+    (void)typeid(OK = false, a2); // both-warning {{has no effect}}
+    if (!OK) return false;
+
+    // Not a glvalue.
+    (void)typeid(OK = false, B2()); // both-warning {{has no effect}}
+    if (!OK) return false;
+
+    // Polymorphic glvalue: operand evaluated.
+    OK = false;
+    B2 b2;
+    (void)typeid(OK = true, b2); // both-warning {{will be evaluated}}
+    return OK;
+  }
+  static_assert(side_effects());
+}