--- old/src/share/vm/opto/memnode.cpp	2015-10-08 22:15:52.942178037 +0200
+++ new/src/share/vm/opto/memnode.cpp	2015-10-08 22:15:52.885179398 +0200
@@ -41,6 +41,7 @@
 #include "opto/narrowptrnode.hpp"
 #include "opto/phaseX.hpp"
 #include "opto/regmask.hpp"
+#include "opto/shenandoahSupport.hpp"
 #include "utilities/copy.hpp"
 
 // Portions of code courtesy of Clifford Click
@@ -1000,6 +1001,7 @@
         (tp != NULL) && tp->is_ptr_to_boxed_value()) {
       intptr_t ignore = 0;
       Node* base = AddPNode::Ideal_base_and_offset(ld_adr, phase, ignore);
+      base = ShenandoahBarrierNode::skip_through_barrier(base);
       if (base != NULL && base->is_Proj() &&
           base->as_Proj()->_con == TypeFunc::Parms &&
           base->in(0)->is_CallStaticJava() &&
@@ -1603,7 +1605,7 @@
     // as to alignment, which will therefore produce the smallest
     // possible base offset.
     const int min_base_off = arrayOopDesc::base_offset_in_bytes(T_BYTE);
-    const bool off_beyond_header = ((uint)off >= (uint)min_base_off);
+    const bool off_beyond_header = (off != -8 || !UseShenandoahGC) && ((uint)off >= (uint)min_base_off);
 
     // Try to constant-fold a stable array element.
     if (FoldStableValues && ary->is_stable() && ary->const_oop() != NULL) {