Sub-minor-key-ify HandlerStubs.

src/field-index.h

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_FIELD_INDEX_H_
 #define V8_FIELD_INDEX_H_
 
 #include "src/property-details.h"
 #include "src/utils.h"
 
 namespace v8 {
 namespace internal {
 
 class Map;
 
 // Wrapper class to hold a field index, usually but not necessarily generated
 // from a property index. When available, the wrapper class captures additional
 // information to allow the field index to be translated back into the property
 // index it was originally generated from.
 class FieldIndex V8_FINAL {
  public:
   static FieldIndex ForPropertyIndex(Map* map,
                                      int index,
                                      bool is_double = false);
   static FieldIndex ForInObjectOffset(int offset, Map* map = NULL);
   static FieldIndex ForDescriptor(Map* map, int descriptor_index);
   static FieldIndex ForLoadByFieldIndex(Map* map, int index);
   static FieldIndex ForKeyedLookupCacheIndex(Map* map, int index);
+  static FieldIndex FromFieldAccessStubKey(int key);
 
   int GetLoadByFieldIndex() const;
 
   bool is_inobject() const {
     return IsInObjectBits::decode(bit_field_);
   }
 
   bool is_double() const {
     return IsDoubleBits::decode(bit_field_);
   }
@@ skipping 36 matching lines @@
              bool is_hidden = false) {
     DCHECK((first_inobject_property_offset & (kPointerSize - 1)) == 0);
     bit_field_ = IsInObjectBits::encode(is_inobject) |
       IsDoubleBits::encode(is_double) |
       FirstInobjectPropertyOffsetBits::encode(first_inobject_property_offset) |
       IsHiddenField::encode(is_hidden) |
       IndexBits::encode(local_index) |
       InObjectPropertyBits::encode(inobject_properties);
   }
 
+  explicit FieldIndex(int bit_field) : bit_field_(bit_field) {}
+
   int first_inobject_property_offset() const {
     DCHECK(!IsHiddenField::decode(bit_field_));
     return FirstInobjectPropertyOffsetBits::decode(bit_field_);
   }
 
   static const int kIndexBitsSize = kDescriptorIndexBitCount + 1;
 
   // Index from beginning of object.
   class IndexBits: public BitField<int, 0, kIndexBitsSize> {};
   class IsInObjectBits: public BitField<bool, IndexBits::kNext, 1> {};
   class IsDoubleBits: public BitField<bool, IsInObjectBits::kNext, 1> {};
   // Number of inobject properties.
   class InObjectPropertyBits
       : public BitField<int, IsDoubleBits::kNext, kDescriptorIndexBitCount> {};
   // Offset of first inobject property from beginning of object.
   class FirstInobjectPropertyOffsetBits
       : public BitField<int, InObjectPropertyBits::kNext, 7> {};
   class IsHiddenField
       : public BitField<bool, FirstInobjectPropertyOffsetBits::kNext, 1> {};
   STATIC_ASSERT(IsHiddenField::kNext <= 32);
 
   int bit_field_;
 };
 
 } }  // namespace v8::internal
 
 #endif