1 files changed, 24 insertions, 0 deletions
diff --git a/gcc/testsuite/g++.dg/ext/instantiate1.C b/gcc/testsuite/g++.dg/ext/instantiate1.C
new file mode 100644
index 000000000..1d2a6200b
--- /dev/null
+++ b/gcc/testsuite/g++.dg/ext/instantiate1.C
@@ -0,0 +1,24 @@
+// Test that 'extern template' suppresses instantiations.
+// { dg-do compile }
+// { dg-options "" }
+
+template <class T> void f (T) { }
+extern template void f (int);
+
+template <class T> struct A {
+  void f ();
+};
+template <class T> void A<T>::f () { }
+extern template struct A<int>;
+
+// { dg-final { scan-assembler-not "\n_?_Z1fIiEvT_(:|\n|\t)" } }
+void test_f_int () { f(42); } 
+
+// { dg-final { scan-assembler-not "\n_?_ZN1AIiE1fEv(:|\n|\t)" } }
+void test_A_int_f () { A<int> a; a.f (); }
+
+// { dg-final { scan-assembler "\n_?_Z1fIdEvT_(:|\n|\t)" } }
+void test_f_double () { f (2.0); }
+
+// { dg-final { scan-assembler "\n_?_ZN1AIdE1fEv(:|\n|\t)" } }
+void test_A_double_f () { A<double> b; b.f (); }