dfg/DFGStructureClobberState.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 DFGStructureClobberState_h
  27 #define DFGStructureClobberState_h
  28
  29 #if ENABLE(DFG_JIT)
  30
  31 #include <wtf/PrintStream.h>
  32
  33 namespace JSC { namespace DFG {
  34
  35 enum StructureClobberState {
  36     StructuresAreWatched, // Constants with watchable structures must have those structures.
  37     StructuresAreClobbered // Constants with watchable structures could have any structure.
  38 };
  39
  40 inline StructureClobberState merge(StructureClobberState a, StructureClobberState b)
  41 {
  42     switch (a) {
  43     case StructuresAreWatched:
  44         return b;
  45     case StructuresAreClobbered:
  46         return StructuresAreClobbered;
  47     }
  48     RELEASE_ASSERT_NOT_REACHED();
  49     return StructuresAreClobbered;
  50 }
  51
  52 } } // namespace JSC::DFG
  53
  54 namespace WTF {
  55
  56 inline void printInternal(PrintStream& out, JSC::DFG::StructureClobberState state)
  57 {
  58     switch (state) {
  59     case JSC::DFG::StructuresAreWatched:
  60         out.print("StructuresAreWatched");
  61         return;
  62     case JSC::DFG::StructuresAreClobbered:
  63         out.print("StructuresAreClobbered");
  64         return;
  65     }
  66     RELEASE_ASSERT_NOT_REACHED();
  67 }
  68
  69 } // namespace WTF
  70
  71 #endif // ENABLE(DFG_JIT)
  72
  73 #endif // DFGStructureClobberState_h