* class.c (check_abi_tags): Fix function template handling.

From-SVN: r234790

gcc/cp/ChangeLog

+2016-04-06  Jason Merrill  <jason@redhat.com>
+
+	* class.c (check_abi_tags): Fix function template handling.
+
 2016-04-05  Nathan Sidwell  <nathan@acm.org>
 
 	PR c++/70512

gcc/cp/class.c

@@ -1604,6 +1604,15 @@ check_abi_tags (tree t, tree subob)
 void
 check_abi_tags (tree decl)
 {
+  tree t;
+  if (abi_version_at_least (10)
+      && DECL_LANG_SPECIFIC (decl)
+      && DECL_USE_TEMPLATE (decl)
+      && (t = DECL_TEMPLATE_RESULT (DECL_TI_TEMPLATE (decl)),
+	  t != decl))
+    /* Make sure that our template has the appropriate tags, since
+       write_unqualified_name looks for them there.  */
+    check_abi_tags (t);
   if (VAR_P (decl))
     check_abi_tags (decl, TREE_TYPE (decl));
   else if (TREE_CODE (decl) == FUNCTION_DECL

gcc/testsuite/g++.dg/abi/abi-tag19.C

+struct __attribute__((abi_tag("a"))) X { };
+template<typename T> struct Y { X f() { return X(); } };
+template struct Y<int>;
+// { dg-final { scan-assembler "_ZN1YIiE1fB1aEv" } }