--- old/src/hotspot/share/ci/ciType.cpp	2019-03-11 14:25:30.302355651 +0100
+++ new/src/hotspot/share/ci/ciType.cpp	2019-03-11 14:25:30.098355654 +0100
@@ -34,8 +34,8 @@
 
 // ciType
 //
-// This class represents either a class (T_OBJECT), array (T_ARRAY),
-// or one of the primitive types such as T_INT.
+// This class represents either a class (T_OBJECT), value (T_VALUETYPE),
+// array (T_ARRAY),or one of the primitive types such as T_INT.
 
 // ------------------------------------------------------------------
 // ciType::ciType
@@ -46,7 +46,7 @@
 }
 
 ciType::ciType(Klass* k) : ciMetadata(k) {
-  _basic_type = k->is_array_klass() ? T_ARRAY : T_OBJECT;
+  _basic_type = k->is_array_klass() ? T_ARRAY : (k->is_value() ? T_VALUETYPE : T_OBJECT);
 }
 
 
@@ -105,6 +105,7 @@
 // ciType::box_klass
 //
 ciKlass* ciType::box_klass() {
+  assert(basic_type() != T_VALUETYPE, "value type boxing not yet supported");
   if (!is_primitive_type())  return this->as_klass();  // reference types are "self boxing"
 
   // Void is "boxed" with a null.