diff -r 13588c901957 -r 9cf78a70fa4f src/hotspot/share/prims/methodHandles.cpp
--- a/src/hotspot/share/prims/methodHandles.cpp	Thu Oct 17 20:27:44 2019 +0100
+++ b/src/hotspot/share/prims/methodHandles.cpp	Thu Oct 17 20:53:35 2019 +0100
@@ -41,7 +41,6 @@
 #include "oops/oop.inline.hpp"
 #include "oops/typeArrayOop.inline.hpp"
 #include "prims/methodHandles.hpp"
-#include "runtime/compilationPolicy.hpp"
 #include "runtime/deoptimization.hpp"
 #include "runtime/fieldDescriptor.inline.hpp"
 #include "runtime/handles.inline.hpp"
@@ -573,7 +572,7 @@
     if (is_subword_type(bt)) {
       bsig = vmSymbols::int_signature();
     } else {
-      assert(bt == T_OBJECT || bt == T_ARRAY, "is_basic_type_signature was false");
+      assert(is_reference_type(bt), "is_basic_type_signature was false");
       bsig = vmSymbols::object_signature();
     }
   } else {
@@ -592,7 +591,7 @@
       if (arg_pos == keep_arg_pos) {
         buffer.write((char*) ss.raw_bytes(),
                      (int)   ss.raw_length());
-      } else if (bt == T_OBJECT || bt == T_ARRAY) {
+      } else if (is_reference_type(bt)) {
         buffer.write(OBJ_SIG, OBJ_SIG_LEN);
       } else {
         if (is_subword_type(bt))
@@ -1004,7 +1003,7 @@
         if (!java_lang_invoke_MemberName::is_instance(result()))
           return -99;  // caller bug!
         oop saved = MethodHandles::init_field_MemberName(result, st.field_descriptor());
-        if (!oopDesc::equals(saved, result()))
+        if (saved != result())
           results->obj_at_put(rfill-1, saved);  // show saved instance to user
       } else if (++overflow >= overflow_limit) {
         match_flags = 0; break; // got tired of looking at overflow
@@ -1056,7 +1055,7 @@
           return -99;  // caller bug!
         CallInfo info(m, NULL, CHECK_0);
         oop saved = MethodHandles::init_method_MemberName(result, info);
-        if (!oopDesc::equals(saved, result()))
+        if (saved != result())
           results->obj_at_put(rfill-1, saved);  // show saved instance to user
       } else if (++overflow >= overflow_limit) {
         match_flags = 0; break; // got tired of looking at overflow