1 /*
   2  * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #include "precompiled.hpp"
  26 #include "gc/shared/c1ModRefBSCodeGen.hpp"
  27 #include "utilities/macros.hpp"
  28 
  29 #ifdef ASSERT
  30 #define __ lir_generator->lir(__FILE__, __LINE__)->
  31 #else
  32 #define __ lir_generator->lir()->
  33 #endif
  34 
  35 void C1ModRefBSCodeGen::store_at_resolved(LIRGenerator *lir_generator, C1DecoratorSet decorators, BasicType type,
  36                                           LIR_Opr addr, LIRItem& base, LIR_Opr offset, LIR_Opr value,
  37                                           CodeEmitInfo* patch_info, CodeEmitInfo* store_emit_info) {
  38   bool is_oop = type == T_OBJECT || type == T_ARRAY;
  39   bool on_array = (decorators & C1_ACCESS_ON_ARRAY) != 0;
  40   bool on_anonymous = (decorators & C1_ACCESS_ON_ANONYMOUS) != 0;
  41 
  42   if (is_oop) {
  43     pre_barrier(lir_generator, decorators, addr, LIR_OprFact::illegalOpr /* pre_val */, patch_info);
  44   }
  45 
  46   C1BarrierSetCodeGen::store_at_resolved(lir_generator, decorators, type, addr, base, offset, value, patch_info, store_emit_info);
  47 
  48   if (is_oop) {
  49     bool precise = on_array || on_anonymous;
  50     LIR_Opr post_addr = precise ? addr : base.result();
  51     post_barrier(lir_generator, decorators, post_addr, value);
  52   }
  53 }
  54 
  55 LIR_Opr C1ModRefBSCodeGen::cas_at_resolved(LIRGenerator *lir_generator, C1DecoratorSet decorators, BasicType type,
  56                                            LIR_Opr addr, LIRItem& base, LIRItem& offset, LIRItem& cmp_value, LIRItem& new_value) {
  57   bool is_oop = type == T_OBJECT || type == T_ARRAY;
  58 
  59   if (is_oop) {
  60     pre_barrier(lir_generator, decorators, addr, LIR_OprFact::illegalOpr /* pre_val */, NULL);
  61   }
  62 
  63   LIR_Opr result = C1BarrierSetCodeGen::cas_at_resolved(lir_generator, decorators, type, addr, base, offset, cmp_value, new_value);
  64 
  65   if (is_oop) {
  66     post_barrier(lir_generator, decorators, addr, new_value.result());
  67   }
  68 
  69   return result;
  70 }
  71 
  72 LIR_Opr C1ModRefBSCodeGen::swap_at_resolved(LIRGenerator* lir_generator, C1DecoratorSet decorators, BasicType type,
  73                                             LIR_Opr addr, LIRItem& base, LIRItem& offset, LIRItem& value) {
  74   bool is_oop = type == T_OBJECT || type == T_ARRAY;
  75 
  76   if (is_oop) {
  77     pre_barrier(lir_generator, decorators, addr, LIR_OprFact::illegalOpr /* pre_val */, NULL);
  78   }
  79 
  80   LIR_Opr result = C1BarrierSetCodeGen::swap_at_resolved(lir_generator, decorators, type, addr, base, offset, value);
  81 
  82   if (is_oop) {
  83     post_barrier(lir_generator, decorators, addr, value.result());
  84   }
  85 
  86   return result;
  87 }