--- old/src/share/vm/c1/c1_LIRGenerator.cpp	2017-04-24 16:58:39.003146648 +0200
+++ new/src/share/vm/c1/c1_LIRGenerator.cpp	2017-04-24 16:58:38.867151212 +0200
@@ -1669,7 +1669,7 @@
   ShenandoahConnectionMatrix* matrix = ShenandoahHeap::heap()->connection_matrix();
 
   LIR_Opr heap_base = new_pointer_register();
-  __ move(LIR_OprFact::intptrConst(ShenandoahHeap::heap()->first_region_bottom()), heap_base);
+  __ move(LIR_OprFact::intptrConst(ShenandoahHeap::heap()->base()), heap_base);
 
   LIR_Opr tmp1 = new_pointer_register();
   __ move(new_val, tmp1);