src/cpu/x86/vm/c1_CodeStubs_x86.cpp

*** 518,528 ****
    Register tmp_reg = tmp()->as_register();
  
    __ load_klass(tmp_reg, src_reg);
  
    Address ref_type_adr(tmp_reg, instanceKlass::reference_type_offset());
!   __ cmpl(ref_type_adr, REF_NONE);
    __ jcc(Assembler::equal, _continuation);
  
    // Is marking active?
    assert(thread()->is_register(), "precondition");
    Register thread_reg = thread()->as_pointer_register();
--- 518,528 ----
    Register tmp_reg = tmp()->as_register();
  
    __ load_klass(tmp_reg, src_reg);
  
    Address ref_type_adr(tmp_reg, instanceKlass::reference_type_offset());
!   __ cmpb(ref_type_adr, REF_NONE);
    __ jcc(Assembler::equal, _continuation);
  
    // Is marking active?
    assert(thread()->is_register(), "precondition");
    Register thread_reg = thread()->as_pointer_register();