src/hotspot/cpu/x86/c2_MacroAssembler_x86.cpp

*** 6177,5 ***
--- 6177,17 ---
    } else {
      assert(bt == T_FLOAT, "");
      vpermps(dst, shuffle, src, vlen_enc);
    }
  }
+ 
+ #ifdef _LP64
+ void C2_MacroAssembler::load_nklass_compact_c2(Register dst, Register obj) {
+   C2LoadNKlassStub* stub = new (Compile::current()->comp_arena()) C2LoadNKlassStub(dst);
+   Compile::current()->output()->add_stub(stub);
+   movq(dst, Address(obj, oopDesc::mark_offset_in_bytes()));
+   testb(dst, markWord::monitor_value);
+   jcc(Assembler::notZero, stub->entry());
+   bind(stub->continuation());
+   shrq(dst, markWord::klass_shift);
+ }
+ #endif