[cleanup] CSA: add helpers for accessing details/value via key_index

src/code-stub-assembler.h

 // 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.
 
 #ifndef V8_CODE_STUB_ASSEMBLER_H_
 #define V8_CODE_STUB_ASSEMBLER_H_
 
 #include <functional>
 
 #include "src/compiler/code-assembler.h"
@@ skipping 867 matching lines @@
                  Label* if_bailout);
 
   // Calculates array index for given dictionary entry and entry field.
   // See Dictionary::EntryToIndex().
   template <typename Dictionary>
   Node* EntryToIndex(Node* entry, int field_index);
   template <typename Dictionary>
   Node* EntryToIndex(Node* entry) {
     return EntryToIndex<Dictionary>(entry, Dictionary::kEntryKeyIndex);
   }
+  // Loads the details for the entry with the given key_index.
+  // Returns an untagged int32.
+  template <class ContainerType>
+  Node* LoadDetailsForKeyIndex(Node* container, Node* key_index);
+  // Loads the value for the entry with the given key_index.
+  // Returns a tagged value.
+  template <class ContainerType>
+  Node* LoadValueForKeyIndex(Node* container, Node* key_index);
+  // Stores the details for the entry with the given key_index.
+  // |details| must be a Smi.
+  template <class ContainerType>
+  void StoreDetailsForKeyIndex(Node* container, Node* key_index, Node* details);
+  // Stores the value for the entry with the given key_index.
+  template <class ContainerType>
+  void StoreValueForKeyIndex(Node* container, Node* key_index, Node* value);
+
   // Calculate a valid size for the a hash table.
   Node* HashTableComputeCapacity(Node* at_least_space_for);
 
   template <class Dictionary>
   Node* GetNumberOfElements(Node* dictionary);
 
   template <class Dictionary>
   void SetNumberOfElements(Node* dictionary, Node* num_elements_smi);
 
   template <class Dictionary>
@@ skipping 427 matching lines @@
   }
 #else
 #define CSA_SLOW_ASSERT(csa, x) ((void)0)
 #endif
 
 DEFINE_OPERATORS_FOR_FLAGS(CodeStubAssembler::AllocationFlags);
 
 }  // namespace internal
 }  // namespace v8
 #endif  // V8_CODE_STUB_ASSEMBLER_H_