src/share/vm/opto/library_call.cpp

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@@ -2151,11 +2151,11 @@
   // The compile time filters did not reject base_oop/offset so
   // we need to generate the following runtime filters
   //
   // if (offset == java_lang_ref_Reference::_reference_offset) {
   //   if (base != null) {
-  //     if (klass(base)->reference_type() != REF_NONE)) {
+  //     if (instance_of(base, java.lang.ref.Reference)) {
   //       pre_barrier(_, pre_val, ...);
   //     }
   //   }
   // }
 

@@ -2163,12 +2163,10 @@
   float unlikely  = PROB_UNLIKELY(0.999);
 
   IdealKit ideal(this);
 #define __ ideal.
 
-  const int reference_type_offset = in_bytes(instanceKlass::reference_type_offset());
-
   Node* referent_off = __ ConX(java_lang_ref_Reference::referent_offset);
 
   __ if_then(offset, BoolTest::eq, referent_off, unlikely); {
     __ if_then(base_oop, BoolTest::ne, null(), likely); {