src/cpu/x86/vm/assembler_x86.cpp

*** 8212,8221 ****
--- 8212,8230 ----
    } else {
      movq(dst, src);
    }
  }
  
+ // Used for storing NULLs.
+ void MacroAssembler::store_heap_oop_null(Address dst) {
+   if (UseCompressedOops) {
+     movl(dst, (int32_t)NULL_WORD);
+   } else {
+     movslq(dst, (int32_t)NULL_WORD);
+   }
+ }
+ 
  // Algorithm must match oop.inline.hpp encode_heap_oop.
  void MacroAssembler::encode_heap_oop(Register r) {
    assert (UseCompressedOops, "should be compressed");
    assert (Universe::heap() != NULL, "java heap should be initialized");
    if (Universe::narrow_oop_base() == NULL) {