VectorICs: use a vector slot to aid in array literal processing.

src/ast.h

 // Copyright 2012 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_AST_H_
 #define V8_AST_H_
 
 #include "src/assembler.h"
 #include "src/ast-value-factory.h"
 #include "src/bailout-reason.h"
@@ skipping 1566 matching lines @@
     return flags;
   }
 
   enum Flags {
     kNoFlags = 0,
     kShallowElements = 1,
     kDisableMementos = 1 << 1,
     kIsStrong = 1 << 2
   };
 
+  void AssignFeedbackVectorSlots(Isolate* isolate, FeedbackVectorSpec* spec,
+                                 FeedbackVectorSlotCache* cache) override;
+  FeedbackVectorSlot LiteralFeedbackSlot() const { return literal_slot_; }
+
  protected:
   ArrayLiteral(Zone* zone, ZoneList<Expression*>* values,
                int first_spread_index, int literal_index, bool is_strong,
                int pos)
       : MaterializedLiteral(zone, literal_index, is_strong, pos),
         values_(values),
         first_spread_index_(first_spread_index) {}
   static int parent_num_ids() { return MaterializedLiteral::num_ids(); }
 
  private:
   int local_id(int n) const { return base_id() + parent_num_ids() + n; }
 
   Handle<FixedArray> constant_elements_;
   ZoneList<Expression*>* values_;
   int first_spread_index_;
+  FeedbackVectorSlot literal_slot_;
 };
 
 
 class VariableProxy final : public Expression {
  public:
   DECLARE_NODE_TYPE(VariableProxy)
 
   bool IsValidReferenceExpression() const override {
     return !is_this() && !is_new_target();
   }
@@ skipping 1998 matching lines @@
   // the parser-level zone.
   Zone* parser_zone_;
   AstValueFactory* ast_value_factory_;
 };
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_AST_H_