--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/hotspot/share/gc/shared/c1/modRefBarrierSetC1.hpp	Thu Apr 26 20:42:43 2018 +0200
@@ -0,0 +1,50 @@
+/*
+ * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+
+#ifndef SHARE_GC_SHARED_C1_MODREFBARRIERSETC1_HPP
+#define SHARE_GC_SHARED_C1_MODREFBARRIERSETC1_HPP
+
+#include "gc/shared/c1/barrierSetC1.hpp"
+
+// The ModRefBarrierSetC1 filters away accesses on BasicTypes other
+// than T_OBJECT/T_ARRAY (oops). The oop accesses call one of the protected
+// accesses, which are overridden in the concrete BarrierSetAssembler.
+
+class ModRefBarrierSetC1 : public BarrierSetC1 {
+protected:
+  virtual void pre_barrier(LIRAccess& access, LIR_Opr addr_opr,
+                           LIR_Opr pre_val, CodeEmitInfo* info) {}
+  virtual void post_barrier(LIRAccess& access, LIR_OprDesc* addr,
+                            LIR_OprDesc* new_val) {}
+
+  virtual LIR_Opr resolve_address(LIRAccess& access, bool resolve_in_register);
+
+  virtual void store_at_resolved(LIRAccess& access, LIR_Opr value);
+
+  virtual LIR_Opr atomic_cmpxchg_at_resolved(LIRAccess& access, LIRItem& cmp_value, LIRItem& new_value);
+
+  virtual LIR_Opr atomic_xchg_at_resolved(LIRAccess& access, LIRItem& value);
+};
+
+#endif // SHARE_GC_SHARED_C1_MODREFBARRIERSETC1_HPP