dfg/DFGBlockWorklist.cpp

   1 /*
   2  * Copyright (C) 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 "DFGBlockWorklist.h"
  28
  29 #if ENABLE(DFG_JIT)
  30
  31 #include "DFGBasicBlock.h"
  32
  33 namespace JSC { namespace DFG {
  34
  35 BlockWorklist::BlockWorklist()
  36 {
  37 }
  38
  39 BlockWorklist::~BlockWorklist()
  40 {
  41 }
  42
  43 bool BlockWorklist::push(BasicBlock* block)
  44 {
  45     if (!m_seen.add(block))
  46         return false;
  47
  48     m_stack.append(block);
  49     return true;
  50 }
  51
  52 BasicBlock* BlockWorklist::pop()
  53 {
  54     if (m_stack.isEmpty())
  55         return nullptr;
  56
  57     return m_stack.takeLast();
  58 }
  59
  60 PostOrderBlockWorklist::PostOrderBlockWorklist()
  61 {
  62 }
  63
  64 PostOrderBlockWorklist::~PostOrderBlockWorklist()
  65 {
  66 }
  67
  68 bool PostOrderBlockWorklist::pushPre(BasicBlock* block)
  69 {
  70     return m_worklist.push(block, PreOrder);
  71 }
  72
  73 void PostOrderBlockWorklist::pushPost(BasicBlock* block)
  74 {
  75     m_worklist.forcePush(block, PostOrder);
  76 }
  77
  78 BlockWithOrder PostOrderBlockWorklist::pop()
  79 {
  80     BlockWith<VisitOrder> result = m_worklist.pop();
  81     return BlockWithOrder(result.block, result.data);
  82 }
  83
  84 } } // namespace JSC::DFG
  85
  86 #endif // ENABLE(DFG_JIT)