--- old/src/share/vm/opto/callGenerator.cpp	2016-11-04 16:24:21.565205291 +0100
+++ new/src/share/vm/opto/callGenerator.cpp	2016-11-04 16:24:21.433205297 +0100
@@ -153,9 +153,14 @@
   }
   _call_node = call;  // Save the call node in case we need it later
   if (!is_static) {
-    // Make an explicit receiver null_check as part of this call.
-    // Since we share a map with the caller, his JVMS gets adjusted.
-    kit.null_check_receiver_before_call(method());
+    if (kit.argument(0)->is_ValueType()) {
+      ValueTypeNode* vt = kit.argument(0)->as_ValueType();
+      vt->store_to_memory(&kit);
+    } else {
+      // Make an explicit receiver null_check as part of this call.
+      // Since we share a map with the caller, his JVMS gets adjusted.
+      kit.null_check_receiver_before_call(method());
+    }
     if (kit.stopped()) {
       // And dump it back to the caller, decorated with any exceptions:
       return kit.transfer_exceptions_into_jvms();