src/hotspot/cpu/x86/gc/shenandoah/shenandoahBarrierSetC1_x86.cpp

rev 55609 : Eliminate extra forwarding pointer per object

@@ -34,10 +34,11 @@
   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();
   assert(cmpval == rax, "wrong register");
   assert(newval != NULL, "new val must be register");
   assert(cmpval != newval, "cmp and new values must be in different registers");
   assert(cmpval != addr, "cmp and addr must be in different registers");

@@ -51,11 +52,11 @@
     __ mov(rscratch1, newval);
     __ encode_heap_oop(rscratch1);
     newval = rscratch1;
   }
 
-  ShenandoahBarrierSet::assembler()->cmpxchg_oop(masm->masm(), result, Address(addr, 0), cmpval, newval, false, tmp1, tmp2);
+  ShenandoahBarrierSet::assembler()->cmpxchg_oop(masm->masm(), result, Address(addr, 0), cmpval, newval, false, tmp1, tmp2, tmp3);
 }
 
 #undef __
 
 #ifdef ASSERT

@@ -76,14 +77,15 @@
       cmp_value.load_item_force(FrameMap::rax_oop_opr);
       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, result));
+      __ 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);
 }