From 61289ca3b2138024652663c1e547e61f14ffa6f9 Mon Sep 17 00:00:00 2001
From: Mark Mitchell <mark@markmitchell.com>
Date: Tue, 1 Sep 1998 13:08:44 +0000
Subject: [PATCH] cp-tree.h (DECL_FRIEND_PSEUDO_TEMPLATE_INSTANTIATION): New
 macro.

	* cp-tree.h (DECL_FRIEND_PSEUDO_TEMPLATE_INSTANTIATION): New macro.
	* decl2.c (import_export_decl): Likewise.
	* pt.c (instantiate_decl): Use it.

From-SVN: r22160
---
 gcc/cp/ChangeLog                             |  6 +++++
 gcc/cp/cp-tree.h                             | 10 +++++++
 gcc/cp/decl2.c                               |  6 +++--
 gcc/cp/pt.c                                  |  3 +--
 gcc/testsuite/g++.old-deja/g++.pt/friend33.C | 28 ++++++++++++++++++++
 5 files changed, 49 insertions(+), 4 deletions(-)
 create mode 100644 gcc/testsuite/g++.old-deja/g++.pt/friend33.C

diff --git a/gcc/cp/ChangeLog b/gcc/cp/ChangeLog
index 665f35d0155..c19dcd7e272 100644
--- a/gcc/cp/ChangeLog
+++ b/gcc/cp/ChangeLog
@@ -1,3 +1,9 @@
+1998-09-01  Mark Mitchell  <mark@markmitchell.com>
+
+	* cp-tree.h (DECL_FRIEND_PSEUDO_TEMPLATE_INSTANTIATION): New macro.
+	* decl2.c (import_export_decl): Likewise.
+	* pt.c (instantiate_decl): Use it.
+
 1998-09-01  Jason Merrill  <jason@yorick.cygnus.com>
 
 	* decl.c (lookup_name_real): Also do implicit typename thing for
diff --git a/gcc/cp/cp-tree.h b/gcc/cp/cp-tree.h
index 096617a5aa4..19d14fd754d 100644
--- a/gcc/cp/cp-tree.h
+++ b/gcc/cp/cp-tree.h
@@ -1724,6 +1724,16 @@ extern int flag_new_for_scope;
 #define SET_CLASSTYPE_EXPLICIT_INSTANTIATION(NODE) \
   (CLASSTYPE_USE_TEMPLATE(NODE) = 3)
 
+/* Non-zero if DECL is a friend function which is an instantiation
+   from the point of view of the compiler, but not from the point of
+   view of the language.  For example given:
+      template <class T> struct S { friend void f(T) {}; };
+   the declaration of `void f(int)' generated when S<int> is
+   instantiated will not be a DECL_TEMPLATE_INSTANTIATION, but will be
+   a DECL_FRIEND_PSUEDO_TEMPLATE_INSTANTIATION.  */
+#define DECL_FRIEND_PSEUDO_TEMPLATE_INSTANTIATION(DECL) \
+  (DECL_TEMPLATE_INFO (DECL) && !DECL_USE_TEMPLATE (DECL))
+
 /* Non-zero iff we are currently processing a declaration for an
    entity with its own template parameter list, and which is not a
    full specialization.  */
diff --git a/gcc/cp/decl2.c b/gcc/cp/decl2.c
index 7d54deca6f6..1359475f486 100644
--- a/gcc/cp/decl2.c
+++ b/gcc/cp/decl2.c
@@ -2837,10 +2837,12 @@ import_export_decl (decl)
   if (DECL_INTERFACE_KNOWN (decl))
     return;
 
-  if (DECL_TEMPLATE_INSTANTIATION (decl))
+  if (DECL_TEMPLATE_INSTANTIATION (decl)
+      || DECL_FRIEND_PSEUDO_TEMPLATE_INSTANTIATION (decl))
     {
       DECL_NOT_REALLY_EXTERN (decl) = 1;
-      if (DECL_IMPLICIT_INSTANTIATION (decl)
+      if ((DECL_IMPLICIT_INSTANTIATION (decl)
+	   || DECL_FRIEND_PSEUDO_TEMPLATE_INSTANTIATION (decl))
 	  && (flag_implicit_templates || DECL_THIS_INLINE (decl)))
 	{
 	  if (!TREE_PUBLIC (decl))
diff --git a/gcc/cp/pt.c b/gcc/cp/pt.c
index aadd36d6c71..f557d04b56b 100644
--- a/gcc/cp/pt.c
+++ b/gcc/cp/pt.c
@@ -7939,8 +7939,7 @@ instantiate_decl (d)
 	    we don't need to look any further.  That's what the check for
 	    DECL_INITIAL is for.  */
 	|| (TREE_CODE (d) == FUNCTION_DECL
-	    && DECL_TEMPLATE_INFO (td) 
-	    && !DECL_TEMPLATE_SPECIALIZATION (td)
+	    && DECL_FRIEND_PSEUDO_TEMPLATE_INSTANTIATION (td)
 	    && !DECL_INITIAL (DECL_TEMPLATE_RESULT (td)));
        )
     {
diff --git a/gcc/testsuite/g++.old-deja/g++.pt/friend33.C b/gcc/testsuite/g++.old-deja/g++.pt/friend33.C
new file mode 100644
index 00000000000..5feec1a06d7
--- /dev/null
+++ b/gcc/testsuite/g++.old-deja/g++.pt/friend33.C
@@ -0,0 +1,28 @@
+// Build don't run:
+// Special g++ Options: -g
+
+template <class P1>
+struct S1
+{
+  struct SS1
+  {
+  };
+  friend void Foo (const SS1& ss1)
+    {
+    }
+};
+
+template <class P1>
+void Foo(const S1<P1>& s1)
+{
+  typedef typename S1<P1>::SS1 TYPE;
+  TYPE t;
+  Foo(t);
+}
+
+int main ()
+{
+  S1<double> obj;
+  Foo(obj);
+}
+
-- 
2.30.2