21   DCHECK_NULL(keys_);  in ~IdentityMapBase()
25   if (keys_) {  in Clear()
29     DeletePointerArray(reinterpret_cast<uintptr_t*>(keys_), capacity_);  in Clear()
31     keys_ = nullptr;  in Clear()
54     if (keys_[index] == address) return index;  // Found.  in ScanKeysFor()
55     if (keys_[index] == not_mapped) return -1;  // Not found.  in ScanKeysFor()
58     if (keys_[index] == address) return index;  // Found.  in ScanKeysFor()
59     if (keys_[index] == not_mapped) return -1;  // Not found.  in ScanKeysFor()
80     if (keys_[index] == address) return {index, true};  // Found.  in InsertKey()
81     if (keys_[index] == not_mapped) {                   // Free entry.  in InsertKey()
84       keys_[index] = address;  in InsertKey()
96   DCHECK_NE(keys_[index], not_mapped);  in DeleteIndex()
97   keys_[index] = not_mapped;  in DeleteIndex()
112     Address key = keys_[next_index];  in DeleteIndex()
123     DCHECK_EQ(not_mapped, keys_[index]);  in DeleteIndex()
125     std::swap(keys_[index], keys_[next_index]);  in DeleteIndex()
202     keys_ = reinterpret_cast<Address*>(NewPointerArray(capacity_));  in InsertEntry()
204     for (int i = 0; i < capacity_; i++) keys_[i] = not_mapped;  in InsertEntry()
209         heap_->RegisterStrongRoots("IdentityMapBase", FullObjectSlot(keys_),  in InsertEntry()
210                                    FullObjectSlot(keys_ + capacity_));  in InsertEntry()
237   DCHECK_NE(keys_[index], ReadOnlyRoots(heap_).not_mapped_symbol().ptr());  in KeyAtIndex()
239   return keys_[index];  in KeyAtIndex()
245   DCHECK_NE(keys_[index], ReadOnlyRoots(heap_).not_mapped_symbol().ptr());  in EntryAtIndex()
256     if (keys_[index] != not_mapped) {  in NextIndex()
274     if (keys_[i] == not_mapped) {  in Rehash()
277       int pos = Hash(keys_[i]) & mask_;  in Rehash()
280         reinsert.push_back(std::pair<Address, uintptr_t>(keys_[i], values_[i]));  in Rehash()
281         keys_[i] = not_mapped;  in Rehash()
301   Address* old_keys = keys_;  in Resize()
309   keys_ = reinterpret_cast<Address*>(NewPointerArray(capacity_));  in Resize()
311   for (int i = 0; i < capacity_; i++) keys_[i] = not_mapped;  in Resize()
324   heap_->UpdateStrongRoots(strong_roots_entry_, FullObjectSlot(keys_),  in Resize()
325                            FullObjectSlot(keys_ + capacity_));  in Resize()