dfg/DFGDesiredIdentifiers.cpp

   1 /*
   2  * Copyright (C) 2013, 2014 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 "DFGDesiredIdentifiers.h"
  28
  29 #if ENABLE(DFG_JIT)
  30
  31 #include "CodeBlock.h"
  32 #include "JSCInlines.h"
  33
  34 namespace JSC { namespace DFG {
  35
  36 DesiredIdentifiers::DesiredIdentifiers()
  37     : m_codeBlock(nullptr)
  38 {
  39 }
  40
  41 DesiredIdentifiers::DesiredIdentifiers(CodeBlock* codeBlock)
  42     : m_codeBlock(codeBlock)
  43 {
  44 }
  45
  46 DesiredIdentifiers::~DesiredIdentifiers()
  47 {
  48 }
  49
  50 unsigned DesiredIdentifiers::numberOfIdentifiers()
  51 {
  52     return m_codeBlock->numberOfIdentifiers() + m_addedIdentifiers.size();
  53 }
  54
  55 void DesiredIdentifiers::addLazily(UniquedStringImpl* rep)
  56 {
  57     m_addedIdentifiers.append(rep);
  58 }
  59
  60 UniquedStringImpl* DesiredIdentifiers::at(unsigned index) const
  61 {
  62     UniquedStringImpl* result;
  63     if (index < m_codeBlock->numberOfIdentifiers())
  64         result = m_codeBlock->identifier(index).impl();
  65     else
  66         result = m_addedIdentifiers[index - m_codeBlock->numberOfIdentifiers()];
  67     ASSERT(result->hasAtLeastOneRef());
  68     return result;
  69 }
  70
  71 void DesiredIdentifiers::reallyAdd(VM& vm, CommonData* commonData)
  72 {
  73     for (unsigned i = 0; i < m_addedIdentifiers.size(); ++i) {
  74         auto rep = m_addedIdentifiers[i];
  75         ASSERT(rep->hasAtLeastOneRef());
  76         commonData->dfgIdentifiers.append(Identifier::fromUid(&vm, rep));
  77     }
  78 }
  79
  80 } } // namespace JSC::DFG
  81
  82 #endif // ENABLE(DFG_JIT)
  83