--- old/src/cpu/x86/vm/x86_64.ad	2017-08-17 11:28:25.467441937 -0400
+++ new/src/cpu/x86/vm/x86_64.ad	2017-08-17 11:28:25.181767318 -0400
@@ -653,7 +653,7 @@
   if (rspec.reloc()->type() == relocInfo::oop_type &&
       d32 != 0 && d32 != (intptr_t) Universe::non_oop_word()) {
     assert(Universe::heap()->is_in_reserved((address)(intptr_t)d32), "should be real oop");
-    assert(cast_to_oop((intptr_t)d32)->is_oop() && (ScavengeRootsInCode || !cast_to_oop((intptr_t)d32)->is_scavengable()), "cannot embed scavengable oops in code");
+    assert(oopDesc::is_oop(cast_to_oop((intptr_t)d32)) && (ScavengeRootsInCode || !cast_to_oop((intptr_t)d32)->is_scavengable()), "cannot embed scavengable oops in code");
   }
 #endif
   cbuf.relocate(cbuf.insts_mark(), rspec, format);
@@ -680,7 +680,7 @@
   if (rspec.reloc()->type() == relocInfo::oop_type &&
       d64 != 0 && d64 != (int64_t) Universe::non_oop_word()) {
     assert(Universe::heap()->is_in_reserved((address)d64), "should be real oop");
-    assert(cast_to_oop(d64)->is_oop() && (ScavengeRootsInCode || !cast_to_oop(d64)->is_scavengable()),
+    assert(oopDesc::is_oop(cast_to_oop(d64)) && (ScavengeRootsInCode || !cast_to_oop(d64)->is_scavengable()),
            "cannot embed scavengable oops in code");
   }
 #endif