[builtins] Introduce DeleteProperty builtin

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 982 matching lines @@
         (ContainerType::kEntryValueIndex - ContainerType::kEntryKeyIndex) *
         kPointerSize;
     StoreFixedArrayElement(container, key_index, value, UPDATE_WRITE_BARRIER,
                            kKeyToValueOffset);
   }
 
   // Calculate a valid size for the a hash table.
   Node* HashTableComputeCapacity(Node* at_least_space_for);
 
   template <class Dictionary>
-  Node* GetNumberOfElements(Node* dictionary);
+  Node* GetNumberOfElements(Node* dictionary) {
+    return LoadFixedArrayElement(dictionary,
+                                 Dictionary::kNumberOfElementsIndex);
+  }
 
   template <class Dictionary>
-  void SetNumberOfElements(Node* dictionary, Node* num_elements_smi);
+  void SetNumberOfElements(Node* dictionary, Node* num_elements_smi) {
+    StoreFixedArrayElement(dictionary, Dictionary::kNumberOfElementsIndex,
+                           num_elements_smi, SKIP_WRITE_BARRIER);
+  }
 
   template <class Dictionary>
-  Node* GetNumberOfDeletedElements(Node* dictionary);
+  Node* GetNumberOfDeletedElements(Node* dictionary) {
+    return LoadFixedArrayElement(dictionary,
+                                 Dictionary::kNumberOfDeletedElementsIndex);
+  }
 
   template <class Dictionary>
-  Node* GetCapacity(Node* dictionary);
+  void SetNumberOfDeletedElements(Node* dictionary, Node* num_deleted_smi) {
+    StoreFixedArrayElement(dictionary,
+                           Dictionary::kNumberOfDeletedElementsIndex,
+                           num_deleted_smi, SKIP_WRITE_BARRIER);
+  }
+
+  template <class Dictionary>
+  Node* GetCapacity(Node* dictionary) {
+    return LoadFixedArrayElement(dictionary, Dictionary::kCapacityIndex);
+  }
 
   template <class Dictionary>
   Node* GetNextEnumerationIndex(Node* dictionary);
 
   template <class Dictionary>
   void SetNextEnumerationIndex(Node* dictionary, Node* next_enum_index_smi);
 
   // Looks up an entry in a NameDictionaryBase successor. If the entry is found
   // control goes to {if_found} and {var_name_index} contains an index of the
   // key field of the entry found. If the key is not found control goes to
@@ skipping 315 matching lines @@
  protected:
   void DescriptorLookup(Node* unique_name, Node* descriptors, Node* bitfield3,
                         Label* if_found, Variable* var_name_index,
                         Label* if_not_found);
   void DescriptorLookupLinear(Node* unique_name, Node* descriptors, Node* nof,
                               Label* if_found, Variable* var_name_index,
                               Label* if_not_found);
   void DescriptorLookupBinary(Node* unique_name, Node* descriptors, Node* nof,
                               Label* if_found, Variable* var_name_index,
                               Label* if_not_found);
+  // Implements DescriptorArray::ToKeyIndex.
+  // Returns an untagged IntPtr.
+  Node* DescriptorArrayToKeyIndex(Node* descriptor_number);
 
   Node* CallGetterIfAccessor(Node* value, Node* details, Node* context,
                              Node* receiver, Label* if_bailout);
 
   Node* TryToIntptr(Node* key, Label* miss);
 
   void BranchIfPrototypesHaveNoElements(Node* receiver_map,
                                         Label* definitely_no_elements,
                                         Label* possibly_elements);
 
@@ skipping 23 matching lines @@
 
   Node* AllocateSlicedString(Heap::RootListIndex map_root_index, Node* length,
                              Node* parent, Node* offset);
 
   Node* AllocateConsString(Heap::RootListIndex map_root_index, Node* length,
                            Node* first, Node* second, AllocationFlags flags);
 
   // Implements DescriptorArray::number_of_entries.
   // Returns an untagged int32.
   Node* DescriptorArrayNumberOfEntries(Node* descriptors);
-  // Implements DescriptorArray::ToKeyIndex.
-  // Returns an untagged IntPtr.
-  Node* DescriptorArrayToKeyIndex(Node* descriptor_number);
   // Implements DescriptorArray::GetSortedKeyIndex.
   // Returns an untagged int32.
   Node* DescriptorArrayGetSortedKeyIndex(Node* descriptors,
                                          Node* descriptor_number);
   // Implements DescriptorArray::GetKey.
   Node* DescriptorArrayGetKey(Node* descriptors, Node* descriptor_number);
 
   static const int kElementLoopUnrollThreshold = 8;
 };
 
@@ skipping 119 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_