*** old/src/cpu/x86/vm/c1_LIRAssembler_x86.cpp	Wed Apr  2 13:58:43 2014
--- new/src/cpu/x86/vm/c1_LIRAssembler_x86.cpp	Wed Apr  2 13:58:43 2014

*** 797,807 ****
--- 797,813 ----
      case T_ARRAY:
        if (c->as_jobject() == NULL) {
          if (UseCompressedOops && !wide) {
            __ movl(as_Address(addr), (int32_t)NULL_WORD);
          } else {
+ #ifdef _LP64
+           __ xorptr(rscratch1, rscratch1);
+           null_check_here = code_offset();
+           __ movptr(as_Address(addr), rscratch1);
+ #else
            __ movptr(as_Address(addr), NULL_WORD);
+ #endif
          }
        } else {
          if (is_literal_address(addr)) {
            ShouldNotReachHere();
            __ movoop(as_Address(addr, noreg), c->as_jobject());