bytecode/StructureStubInfo.cpp

   1 /*
   2  * Copyright (C) 2008 Apple Inc. All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  * 1. Redistributions of source code must retain the above copyright
   8  *    notice, this list of conditions and the following disclaimer.
   9  * 2. Redistributions in binary form must reproduce the above copyright
  10  *    notice, this list of conditions and the following disclaimer in the
  11  *    documentation and/or other materials provided with the distribution.
  12  *
  13  * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
  14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
  17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  24  */
  25
  26 #include "config.h"
  27 #include "StructureStubInfo.h"
  28
  29 namespace JSC {
  30
  31 #if ENABLE(JIT)
  32 void StructureStubInfo::deref()
  33 {
  34     switch (opcodeID) {
  35     case op_get_by_id_self:
  36         u.getByIdSelf.baseObjectStructure->deref();
  37         return;
  38     case op_get_by_id_proto:
  39         u.getByIdProto.baseObjectStructure->deref();
  40         u.getByIdProto.prototypeStructure->deref();
  41         return;
  42     case op_get_by_id_chain:
  43         u.getByIdChain.baseObjectStructure->deref();
  44         u.getByIdChain.chain->deref();
  45         return;
  46     case op_get_by_id_self_list: {
  47         PolymorphicAccessStructureList* polymorphicStructures = u.getByIdSelfList.structureList;
  48         polymorphicStructures->derefStructures(u.getByIdSelfList.listSize);
  49         delete polymorphicStructures;
  50         return;
  51     }
  52     case op_get_by_id_proto_list: {
  53         PolymorphicAccessStructureList* polymorphicStructures = u.getByIdProtoList.structureList;
  54         polymorphicStructures->derefStructures(u.getByIdProtoList.listSize);
  55         delete polymorphicStructures;
  56         return;
  57     }
  58     case op_put_by_id_transition:
  59         u.putByIdTransition.previousStructure->deref();
  60         u.putByIdTransition.structure->deref();
  61         u.putByIdTransition.chain->deref();
  62         return;
  63     case op_put_by_id_replace:
  64         u.putByIdReplace.baseObjectStructure->deref();
  65         return;
  66     case op_get_by_id:
  67     case op_put_by_id:
  68     case op_get_by_id_generic:
  69     case op_put_by_id_generic:
  70     case op_get_array_length:
  71     case op_get_string_length:
  72         // These instructions don't ref their Structures.
  73         return;
  74     default:
  75         ASSERT_NOT_REACHED();
  76     }
  77 }
  78 #endif
  79
  80 } // namespace JSC