diff -r 64d9a4d582bc -r 2584e5772546 src/hotspot/cpu/aarch64/gc/shenandoah/shenandoahBarrierSetC1_aarch64.cpp
--- a/src/hotspot/cpu/aarch64/gc/shenandoah/shenandoahBarrierSetC1_aarch64.cpp	Wed May 08 10:10:54 2019 -0400
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,110 +0,0 @@
-/*
- * Copyright (c) 2018, Red Hat, Inc. All rights reserved.
- *
- * This code is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 only, as
- * published by the Free Software Foundation.
- *
- * This code is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
- * version 2 for more details (a copy is included in the LICENSE file that
- * accompanied this code).
- *
- * You should have received a copy of the GNU General Public License version
- * 2 along with this work; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
- *
- * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
- * or visit www.oracle.com if you need additional information or have any
- * questions.
- *
- */
-
-#include "precompiled.hpp"
-#include "c1/c1_LIRAssembler.hpp"
-#include "c1/c1_MacroAssembler.hpp"
-#include "gc/shenandoah/shenandoahBarrierSet.hpp"
-#include "gc/shenandoah/shenandoahBarrierSetAssembler.hpp"
-#include "gc/shenandoah/c1/shenandoahBarrierSetC1.hpp"
-
-#define __ masm->masm()->
-
-void LIR_OpShenandoahCompareAndSwap::emit_code(LIR_Assembler* masm) {
-  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 result = result_opr()->as_register();
-
-  ShenandoahBarrierSet::assembler()->storeval_barrier(masm->masm(), newval, rscratch2);
-
-  if (UseCompressedOops) {
-    __ encode_heap_oop(tmp1, cmpval);
-    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
-#define __ gen->lir(__FILE__, __LINE__)->
-#else
-#define __ gen->lir()->
-#endif
-
-LIR_Opr ShenandoahBarrierSetC1::atomic_cmpxchg_at_resolved(LIRAccess& access, LIRItem& cmp_value, LIRItem& new_value) {
-  BasicType bt = access.type();
-  if (access.is_oop()) {
-    LIRGenerator *gen = access.gen();
-    if (ShenandoahSATBBarrier) {
-      pre_barrier(gen, access.access_emit_info(), access.decorators(), access.resolved_addr(),
-                  LIR_OprFact::illegalOpr /* pre_val */);
-    }
-    if (ShenandoahCASBarrier) {
-      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);
-}
-
-LIR_Opr ShenandoahBarrierSetC1::atomic_xchg_at_resolved(LIRAccess& access, LIRItem& value) {
-  LIRGenerator* gen = access.gen();
-  BasicType type = access.type();
-
-  LIR_Opr result = gen->new_register(type);
-  value.load_item();
-  LIR_Opr value_opr = value.result();
-
-  if (access.is_oop()) {
-    value_opr = storeval_barrier(access.gen(), value_opr, access.access_emit_info(), access.decorators());
-  }
-
-  assert(type == T_INT || type == T_OBJECT || type == T_ARRAY LP64_ONLY( || type == T_LONG ), "unexpected type");
-  LIR_Opr tmp = gen->new_register(T_INT);
-  __ xchg(access.resolved_addr(), value_opr, result, tmp);
-
-  if (access.is_oop()) {
-    result = load_reference_barrier(access.gen(), result, access.access_emit_info(), true);
-    if (ShenandoahSATBBarrier) {
-      pre_barrier(access.gen(), access.access_emit_info(), access.decorators(), LIR_OprFact::illegalOpr,
-                  result /* pre_val */);
-    }
-  }
-
-  return result;
-}