src/hotspot/cpu/aarch64/gc/shenandoah/shenandoahBarrierSetC1_aarch64.cpp

rev 55609 : Eliminate extra forwarding pointer per object

*** 34,43 ****
--- 34,44 ----
    Register addr = _addr->as_register_lo();
    Register newval = _new_value->as_register();
    Register cmpval = _cmp_value->as_register();
    Register tmp1 = _tmp1->as_register();
    Register tmp2 = _tmp2->as_register();
+   Register tmp3 = _tmp3->as_register();
    Register result = result_opr()->as_register();
  
    ShenandoahBarrierSet::assembler()->storeval_barrier(masm->masm(), newval, rscratch2);
  
    if (UseCompressedOops) {
*** 45,55 ****
      cmpval = tmp1;
      __ encode_heap_oop(tmp2, newval);
      newval = tmp2;
    }
  
!   ShenandoahBarrierSet::assembler()->cmpxchg_oop(masm->masm(), addr, cmpval, newval, /*acquire*/ false, /*release*/ true, /*weak*/ false, /*is_cae*/ false, result);
  }
  
  #undef __
  
  #ifdef ASSERT
--- 46,56 ----
      cmpval = tmp1;
      __ encode_heap_oop(tmp2, newval);
      newval = tmp2;
    }
  
!   ShenandoahBarrierSet::assembler()->cmpxchg_oop(masm->masm(), addr, cmpval, newval, /*acquire*/ false, /*release*/ true, /*weak*/ false, /*is_cae*/ false, tmp3, result);
  }
  
  #undef __
  
  #ifdef ASSERT
*** 70,83 ****
        cmp_value.load_item();
        new_value.load_item();
  
        LIR_Opr t1 = gen->new_register(T_OBJECT);
        LIR_Opr t2 = gen->new_register(T_OBJECT);
        LIR_Opr addr = access.resolved_addr()->as_address_ptr()->base();
        LIR_Opr result = gen->new_register(T_INT);
  
!       __ append(new LIR_OpShenandoahCompareAndSwap(addr, cmp_value.result(), new_value.result(), t1, t2, result));
        return result;
      }
    }
    return BarrierSetC1::atomic_cmpxchg_at_resolved(access, cmp_value, new_value);
  }
--- 71,85 ----
        cmp_value.load_item();
        new_value.load_item();
  
        LIR_Opr t1 = gen->new_register(T_OBJECT);
        LIR_Opr t2 = gen->new_register(T_OBJECT);
+       LIR_Opr t3 = gen->new_register(T_OBJECT);
        LIR_Opr addr = access.resolved_addr()->as_address_ptr()->base();
        LIR_Opr result = gen->new_register(T_INT);
  
!       __ append(new LIR_OpShenandoahCompareAndSwap(addr, cmp_value.result(), new_value.result(), t1, t2, t3, result));
        return result;
      }
    }
    return BarrierSetC1::atomic_cmpxchg_at_resolved(access, cmp_value, new_value);
  }