[ic] Delete old KeyedLoadIC code

src/lookup-cache.cc

 // Copyright 2016 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.
 
 #include "src/lookup-cache.h"
 
 #include "src/objects-inl.h"
 
 namespace v8 {
 namespace internal {
 
 void DescriptorLookupCache::Clear() {
   for (int index = 0; index < kLength; index++) keys_[index].source = NULL;
 }
 
-int KeyedLookupCache::Hash(Handle<Map> map, Handle<Name> name) {
-  DisallowHeapAllocation no_gc;
-  // Uses only lower 32 bits if pointers are larger.
-  uintptr_t addr_hash =
-      static_cast<uint32_t>(reinterpret_cast<uintptr_t>(*map)) >> kMapHashShift;
-  return static_cast<uint32_t>((addr_hash ^ name->Hash()) & kCapacityMask);
-}
-
-int KeyedLookupCache::Lookup(Handle<Map> map, Handle<Name> name) {
-  DisallowHeapAllocation no_gc;
-  int index = (Hash(map, name) & kHashMask);
-  for (int i = 0; i < kEntriesPerBucket; i++) {
-    Key& key = keys_[index + i];
-    if ((key.map == *map) && key.name->Equals(*name)) {
-      return field_offsets_[index + i];
-    }
-  }
-  return kNotFound;
-}
-
-void KeyedLookupCache::Update(Handle<Map> map, Handle<Name> name,
-                              int field_offset) {
-  DisallowHeapAllocation no_gc;
-  if (!name->IsUniqueName()) {
-    if (!StringTable::InternalizeStringIfExists(name->GetIsolate(),
-                                                Handle<String>::cast(name))
-             .ToHandle(&name)) {
-      return;
-    }
-  }
-  // This cache is cleared only between mark compact passes, so we expect the
-  // cache to only contain old space names.
-  DCHECK(!map->GetIsolate()->heap()->InNewSpace(*name));
-
-  int index = (Hash(map, name) & kHashMask);
-  // After a GC there will be free slots, so we use them in order (this may
-  // help to get the most frequently used one in position 0).
-  for (int i = 0; i < kEntriesPerBucket; i++) {
-    Key& key = keys_[index];
-    Object* free_entry_indicator = NULL;
-    if (key.map == free_entry_indicator) {
-      key.map = *map;
-      key.name = *name;
-      field_offsets_[index + i] = field_offset;
-      return;
-    }
-  }
-  // No free entry found in this bucket, so we move them all down one and
-  // put the new entry at position zero.
-  for (int i = kEntriesPerBucket - 1; i > 0; i--) {
-    Key& key = keys_[index + i];
-    Key& key2 = keys_[index + i - 1];
-    key = key2;
-    field_offsets_[index + i] = field_offsets_[index + i - 1];
-  }
-
-  // Write the new first entry.
-  Key& key = keys_[index];
-  key.map = *map;
-  key.name = *name;
-  field_offsets_[index] = field_offset;
-}
-
-void KeyedLookupCache::Clear() {
-  for (int index = 0; index < kLength; index++) keys_[index].map = NULL;
-}
-
 }  // namespace internal
 }  // namespace v8