--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/clang/test/SemaTemplate/instantiate-decl-init.cpp	Thu Feb 13 15:10:13 2020 +0900
@@ -0,0 +1,67 @@
+// RUN: %clang_cc1 -fsyntax-only -verify %s
+// expected-no-diagnostics
+
+// PR5426 - the non-dependent obj would be fully processed and wrapped in a
+// CXXConstructExpr at definition time, which would lead to a failure at
+// instantiation time.
+struct arg {
+  arg();
+};
+
+struct oldstylemove {
+  oldstylemove(oldstylemove&);
+  oldstylemove(const arg&);
+};
+
+template <typename T>
+void fn(T t, const arg& arg) {
+  oldstylemove obj(arg);
+}
+
+void test() {
+  fn(1, arg());
+}
+
+struct X0 { };
+
+struct X1 {
+  explicit X1(const X0 &x0 = X0());
+};
+
+template<typename T>
+void f0() {
+  X1 x1;
+}
+
+template void f0<int>();
+template void f0<float>();
+
+struct NonTrivial {
+  NonTrivial();
+  ~NonTrivial();
+};
+
+template<int N> void f1() {
+  NonTrivial array[N];
+}
+template<> void f1<2>();
+
+namespace PR20346 {
+  struct S { short inner_s; };
+
+  struct outer_struct {
+    wchar_t arr[32];
+    S outer_s;
+  };
+
+  template <class T>
+  void OpenFileSession() {
+    // Ensure that we don't think the ImplicitValueInitExpr generated here
+    // during the initial parse only initializes the first array element!
+    outer_struct asdfasdf = {};
+  };
+
+  void foo() {
+    OpenFileSession<int>();
+  }
+}