dfg/DFGTransition.h

   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 #ifndef DFGTransition_h
  27 #define DFGTransition_h
  28
  29 #if ENABLE(DFG_JIT)
  30
  31 #include <wtf/PrintStream.h>
  32 #include <wtf/Vector.h>
  33
  34 namespace JSC {
  35
  36 class Structure;
  37 struct DumpContext;
  38
  39 namespace DFG {
  40
  41 struct Transition {
  42     Structure* previous;
  43     Structure* next;
  44
  45     Transition()
  46         : previous(nullptr)
  47         , next(nullptr)
  48     {
  49     }
  50
  51     Transition(Structure* previous, Structure* next)
  52         : previous(previous)
  53         , next(next)
  54     {
  55     }
  56
  57     void dumpInContext(PrintStream&, DumpContext*) const;
  58     void dump(PrintStream&) const;
  59 };
  60
  61 typedef Vector<Transition, 3> TransitionVector;
  62
  63 } } // namespace JSC::DFG
  64
  65 #endif // ENABLE(DFG_JIT)
  66
  67 #endif // DFGTransition_h
  68