8343158: [JVMCI] ZGC should deoptimize on old gen allocation

Reviewed-by: aboldtch, eosterlund

Author: Tom Rodriguez

src/hotspot/share/gc/z/zBarrierSet.cpp

@@ -115,7 +115,9 @@ static void deoptimize_allocation(JavaThread* thread) {
   assert(caller_frame.is_compiled_frame(), "must be compiled");
 
   const nmethod* const nm = caller_frame.cb()->as_nmethod();
-  if (nm->is_compiled_by_c2() && !caller_frame.is_deoptimized_frame()) {
+  if ((nm->is_compiled_by_c2() || nm->is_compiled_by_jvmci()) && !caller_frame.is_deoptimized_frame()) {
+    // The JIT might have elided barriers on this object so deoptimize the frame and let the
+    // intepreter deal with it.
     Deoptimization::deoptimize_frame(thread, caller_frame.id());
   }
 }