dfg/DFGPromoteHeapAccess.h

   1 /*
   2  * Copyright (C) 2014, 2015 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 DFGPromoteHeapAccess_h
  27 #define DFGPromoteHeapAccess_h
  28
  29 #if ENABLE(DFG_JIT)
  30
  31 #include "DFGNode.h"
  32 #include "DFGPromotedHeapLocation.h"
  33
  34 namespace JSC { namespace DFG {
  35
  36 template<typename WriteFunctor, typename ReadFunctor>
  37 void promoteHeapAccess(Node* node, const WriteFunctor& write, const ReadFunctor& read)
  38 {
  39     switch (node->op()) {
  40     case CheckStructure: {
  41         if (node->child1()->isPhantomObjectAllocation())
  42             read(PromotedHeapLocation(StructurePLoc, node->child1()));
  43         break;
  44     }
  45
  46     case GetByOffset:
  47     case GetGetterSetterByOffset: {
  48         if (node->child2()->isPhantomObjectAllocation()) {
  49             unsigned identifierNumber = node->storageAccessData().identifierNumber;
  50             read(PromotedHeapLocation(NamedPropertyPLoc, node->child2(), identifierNumber));
  51         }
  52         break;
  53     }
  54
  55     case MultiGetByOffset: {
  56         if (node->child1()->isPhantomObjectAllocation()) {
  57             unsigned identifierNumber = node->multiGetByOffsetData().identifierNumber;
  58             read(PromotedHeapLocation(NamedPropertyPLoc, node->child1(), identifierNumber));
  59         }
  60         break;
  61     }
  62
  63     case GetClosureVar:
  64         if (node->child1()->isPhantomActivationAllocation())
  65             read(PromotedHeapLocation(ClosureVarPLoc, node->child1(), node->scopeOffset().offset()));
  66         break;
  67
  68     case SkipScope:
  69         if (node->child1()->isPhantomActivationAllocation())
  70             read(PromotedHeapLocation(ActivationScopePLoc, node->child1()));
  71         break;
  72
  73     case GetScope:
  74         if (node->child1()->isPhantomFunctionAllocation())
  75             read(PromotedHeapLocation(FunctionActivationPLoc, node->child1()));
  76         break;
  77
  78     case GetExecutable:
  79         if (node->child1()->isPhantomFunctionAllocation())
  80             read(PromotedHeapLocation(FunctionExecutablePLoc, node->child1()));
  81         break;
  82
  83     case PutHint: {
  84         ASSERT(node->child1()->isPhantomAllocation());
  85         write(
  86             PromotedHeapLocation(node->child1().node(), node->promotedLocationDescriptor()),
  87             node->child2());
  88         break;
  89     }
  90
  91     default:
  92         break;
  93     }
  94 }
  95
  96 } } // namespace JSC::DFG
  97
  98 #endif // ENABLE(DFG_JIT)
  99
 100 #endif // DFGPromoteHeapAccess_h
 101