diff -r 0d7877278adf -r bc0648405d67 src/hotspot/share/gc/shenandoah/c2/shenandoahBarrierSetC2.cpp
--- a/src/hotspot/share/gc/shenandoah/c2/shenandoahBarrierSetC2.cpp	Wed Sep 18 20:56:19 2019 +0200
+++ b/src/hotspot/share/gc/shenandoah/c2/shenandoahBarrierSetC2.cpp	Wed Sep 18 20:56:20 2019 +0200
@@ -475,9 +475,11 @@
 }
 
 const TypeFunc* ShenandoahBarrierSetC2::shenandoah_load_reference_barrier_Type() {
-  const Type **fields = TypeTuple::fields(1);
+  const Type **fields = TypeTuple::fields(2);
   fields[TypeFunc::Parms+0] = TypeInstPtr::NOTNULL; // original field value
-  const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+1, fields);
+  fields[TypeFunc::Parms+1] = TypeRawPtr::BOTTOM;   // original load address
+
+  const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+2, fields);
 
   // create result type (range)
   fields = TypeTuple::fields(1);