diff -r e27564cd10e3 -r 08a5148e7c4e src/hotspot/cpu/x86/sharedRuntime_x86_64.cpp
--- a/src/hotspot/cpu/x86/sharedRuntime_x86_64.cpp	Mon Sep 23 14:39:11 2019 -0400
+++ b/src/hotspot/cpu/x86/sharedRuntime_x86_64.cpp	Mon Sep 23 14:49:04 2019 -0400
@@ -1816,8 +1816,7 @@
   Register temp_reg = rbx;  // not part of any compiled calling seq
   if (VerifyOops) {
     for (int i = 0; i < method->size_of_parameters(); i++) {
-      if (sig_bt[i] == T_OBJECT ||
-          sig_bt[i] == T_ARRAY) {
+      if (is_reference_type(sig_bt[i])) {
         VMReg r = regs[i].first();
         assert(r->is_valid(), "bad oop arg");
         if (r->is_stack()) {
@@ -2717,7 +2716,7 @@
   __ reset_last_Java_frame(false);
 
   // Unbox oop result, e.g. JNIHandles::resolve value.
-  if (ret_type == T_OBJECT || ret_type == T_ARRAY) {
+  if (is_reference_type(ret_type)) {
     __ resolve_jobject(rax /* value */,
                        r15_thread /* thread */,
                        rcx /* tmp */);