--- a/src/share/vm/opto/escape.cpp	Wed Feb 18 13:53:42 2009 -0800
+++ b/src/share/vm/opto/escape.cpp	Thu Feb 19 17:38:53 2009 -0800
@@ -756,6 +756,16 @@
       } else {
         break;
       }
+    } else if (result->Opcode() == Op_SCMemProj) {
+      assert(result->in(0)->is_LoadStore(), "sanity");
+      const Type *at = phase->type(result->in(0)->in(MemNode::Address));
+      if (at != Type::TOP) {
+        assert (at->isa_ptr() != NULL, "pointer type required.");
+        int idx = C->get_alias_index(at->is_ptr());
+        assert(idx != alias_idx, "Object is not scalar replaceable if a LoadStore node access its field");
+        break;
+      }
+      result = result->in(0)->in(MemNode::Memory);
     }
   }
   if (result->is_Phi()) {

--- a/src/share/vm/opto/macro.cpp	Wed Feb 18 13:53:42 2009 -0800
+++ b/src/share/vm/opto/macro.cpp	Thu Feb 19 17:38:53 2009 -0800
@@ -250,6 +250,15 @@
         assert(adr_idx == Compile::AliasIdxRaw, "address must match or be raw");
       }
       mem = mem->in(MemNode::Memory);
+    } else if (mem->Opcode() == Op_SCMemProj) {
+      assert(mem->in(0)->is_LoadStore(), "sanity");
+      const TypePtr* atype = mem->in(0)->in(MemNode::Address)->bottom_type()->is_ptr();
+      int adr_idx = Compile::current()->get_alias_index(atype);
+      if (adr_idx == alias_idx) {
+        assert(false, "Object is not scalar replaceable if a LoadStore node access its field");
+        return NULL;
+      }
+      mem = mem->in(0)->in(MemNode::Memory);
     } else {
       return mem;
     }
@@ -329,8 +338,15 @@
           return NULL;
         }
         values.at_put(j, val);
+      } else if (val->Opcode() == Op_SCMemProj) {
+        assert(val->in(0)->is_LoadStore(), "sanity");
+        assert(false, "Object is not scalar replaceable if a LoadStore node access its field");
+        return NULL;
       } else {
+#ifdef ASSERT
+        val->dump();
         assert(false, "unknown node on this path");
+#endif
         return NULL;  // unknown node on this path
       }
     }