--- old/src/share/vm/opto/memnode.cpp	2016-03-25 20:28:57.000000000 +0300
+++ new/src/share/vm/opto/memnode.cpp	2016-03-25 20:28:56.000000000 +0300
@@ -742,7 +742,7 @@
     // standard dump does this in Verbose and WizardMode
     st->print(" #"); _type->dump_on(st);
   }
-  if (!_depends_only_on_test) {
+  if (!depends_only_on_test()) {
     st->print(" (does not depend only on test)");
   }
 }
@@ -914,7 +914,7 @@
       }
     }
     // load depends on the tests that validate the arraycopy
-    ld->as_Load()->_depends_only_on_test = Pinned;
+    ld->as_Load()->_control_dependency = Pinned;
     return ld;
   }
   return NULL;
@@ -1118,6 +1118,39 @@
   return this;
 }
 
+// Construct an equivalent unsigned load.
+Node* LoadNode::convert_to_unsigned_load(PhaseGVN& gvn) {
+  BasicType bt = T_ILLEGAL;
+  const Type* rt = NULL;
+  switch (Opcode()) {
+    case Op_LoadUB: return this;
+    case Op_LoadUS: return this;
+    case Op_LoadB: bt = T_BOOLEAN; rt = TypeInt::UBYTE; break;
+    case Op_LoadS: bt = T_CHAR;    rt = TypeInt::CHAR;  break;
+    default:
+      assert(false, "no unsigned variant");
+      return NULL;
+  }
+  return LoadNode::make(gvn, in(MemNode::Control), in(MemNode::Memory), in(MemNode::Address),
+                        adr_type(), rt, bt, _mo, _control_dependency,
+                        is_unaligned_access(), is_mismatched_access());
+}
+
+// Construct an equivalent signed load.
+Node* LoadNode::convert_to_signed_load(PhaseGVN& gvn) {
+  BasicType bt = T_ILLEGAL;
+  const Type* rt = NULL;
+  switch (Opcode()) {
+    case Op_LoadUB: bt = T_BYTE;  rt = TypeInt::BYTE;  break;
+    case Op_LoadUS: bt = T_SHORT; rt = TypeInt::SHORT; break;
+    default:
+      return this; // All other loads are signed.
+  }
+  return LoadNode::make(gvn, in(MemNode::Control), in(MemNode::Memory), in(MemNode::Address),
+                        adr_type(), rt, bt, _mo, _control_dependency,
+                        is_unaligned_access(), is_mismatched_access());
+}
+
 // We're loading from an object which has autobox behaviour.
 // If this object is result of a valueOf call we'll have a phi
 // merging a newly allocated object and a load from the cache.