[ic] Support non-code handlers in megamorphic stub cache.

src/field-index-inl.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_INL_H_
 #define V8_FIELD_INDEX_INL_H_
 
 #include "src/field-index.h"
 #include "src/ic/handler-configuration.h"
 
@@ skipping 67 matching lines @@
   if (is_inobject()) {
     result -= JSObject::kHeaderSize / kPointerSize;
   } else {
     result -= FixedArray::kHeaderSize / kPointerSize;
     result = -result - 1;
   }
   result <<= 1;
   return is_double() ? (result | 1) : result;
 }
 
-// Takes an offset as computed by GetLoadByFieldOffset and reconstructs a
-// FieldIndex object from it.
-// static
-inline FieldIndex FieldIndex::ForLoadByFieldOffset(Map* map, int offset) {
-  DCHECK(LoadHandlerTypeBit::decode(offset) == kLoadICHandlerForProperties);
-  bool is_inobject = FieldOffsetIsInobject::decode(offset);
-  bool is_double = FieldOffsetIsDouble::decode(offset);
-  int field_index = FieldOffsetOffset::decode(offset) >> kPointerSizeLog2;
-  int first_inobject_offset = 0;
-  if (is_inobject) {
-    first_inobject_offset =
-        map->IsJSObjectMap() ? map->GetInObjectPropertyOffset(0) : 0;
-  } else {
-    first_inobject_offset = FixedArray::kHeaderSize;
-  }
-  int inobject_properties =
-      map->IsJSObjectMap() ? map->GetInObjectProperties() : 0;
-  FieldIndex result(is_inobject, field_index, is_double, inobject_properties,
-                    first_inobject_offset);
-  DCHECK(result.GetLoadByFieldOffset() == offset);
-  return result;
-}
-
 // Returns the offset format consumed by TurboFan stubs:
 // (offset << 3) | (is_double << 2) | (is_inobject << 1) | is_property
 // Where |offset| is relative to object start or FixedArray start, respectively.
 inline int FieldIndex::GetLoadByFieldOffset() const {
   return FieldOffsetIsInobject::encode(is_inobject()) |
          FieldOffsetIsDouble::encode(is_double()) |
          FieldOffsetOffset::encode(index() << kPointerSizeLog2) |
          LoadHandlerTypeBit::encode(kLoadICHandlerForProperties);
 }
 
@@ skipping 26 matching lines @@
   } else {
     return property_index();
   }
 }
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif