From a3e14f367c292f053515b5244bf0b7fb11a4e0bc Mon Sep 17 00:00:00 2001
From: jason <jason@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Wed, 25 May 2011 01:08:16 +0000
Subject: [PATCH] 	PR c++/47544
 	* pt.c (instantiate_decl): Handle =default.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/branches/gcc-4_6-branch@174159 138bc75d-0d04-0410-961f-82ee72b054a4

index 8646f08..c8eb1d5 100644
--- a/gcc/cp/pt.c
+++ b/gcc/cp/pt.c
@@ -17210,7 +17210,8 @@ instantiate_decl (tree d, int defer_ok,
     args = gen_args;
 
   if (TREE_CODE (d) == FUNCTION_DECL)
-    pattern_defined = (DECL_SAVED_TREE (code_pattern) != NULL_TREE);
+    pattern_defined = (DECL_SAVED_TREE (code_pattern) != NULL_TREE
+		       || DECL_DEFAULTED_OUTSIDE_CLASS_P (code_pattern));
   else
     pattern_defined = ! DECL_IN_AGGR_P (code_pattern);
 
@@ -17405,6 +17406,8 @@ instantiate_decl (tree d, int defer_ok,
       cp_finish_decl (d, init, const_init, NULL_TREE, 0);
       pop_nested_class ();
     }
+  else if (TREE_CODE (d) == FUNCTION_DECL && DECL_DEFAULTED_FN (code_pattern))
+    synthesize_method (d);
   else if (TREE_CODE (d) == FUNCTION_DECL)
     {
       htab_t saved_local_specializations;
new file mode 100644
index 0000000..7d9139d
--- /dev/null
+++ b/gcc/testsuite/g++.dg/cpp0x/defaulted27.C
@@ -0,0 +1,19 @@
+// PR c++/47544
+// { dg-options -std=c++0x }
+// { dg-final { scan-assembler "_ZN1sIiEC2Ev" } }
+// { dg-final { scan-assembler-not "_ZN1sIiED2Ev" } }
+
+template <typename T>
+struct s {
+  s();
+  ~s() = default;
+};
+
+extern template struct s<int>;
+
+template <typename T>
+s<T>::s() = default;
+
+template struct s<int>;
+
+s<int> a;
-- 
1.7.0.4