Collect type profile for DevTools.

src/ast/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_AST_H_
 #define V8_AST_AST_H_
 
 #include "src/ast/ast-types.h"
 #include "src/ast/ast-value-factory.h"
 #include "src/ast/modules.h"
@@ skipping 2396 matching lines @@
     bit_field_ = IsUninitializedField::update(bit_field_, b);
   }
   void set_key_type(IcCheckType key_type) {
     bit_field_ = KeyTypeField::update(bit_field_, key_type);
   }
   void set_store_mode(KeyedAccessStoreMode mode) {
     bit_field_ = StoreModeField::update(bit_field_, mode);
   }
 
   void AssignFeedbackSlots(FeedbackVectorSpec* spec, LanguageMode language_mode,
-                           FeedbackSlotCache* cache);
+                           FeedbackSlotCache* cache,
+                           bool collect_type_profile = false);
   FeedbackSlot AssignmentSlot() const { return slot_; }
 
+  FeedbackSlot CollectTypeProfileSlot() const {

[Yang, 2017/03/09 10:28:27]

CollectTypeProfileSlot sounds like an action. Can we rename this to
TypeProfileSlot?

[Franzi, 2017/03/10 12:14:28]

Done.

+    DCHECK(HasCollectTypeProfileSlot());
+    return collect_type_profile_slot_;
+  }
+
+  bool HasCollectTypeProfileSlot() const {
+    return CollectTypeProfileSlotField::decode(bit_field_);

[Yang, 2017/03/09 10:28:27]

Do we really need this bit in the bit field? Can we just check whether the
FeedbackSlot is invalid?

[Franzi, 2017/03/10 12:14:28]

Done.

+  }
+
  private:
   friend class AstNodeFactory;
 
   Assignment(Token::Value op, Expression* target, Expression* value, int pos);
 
   static int parent_num_ids() { return Expression::num_ids(); }
   int local_id(int n) const { return base_id() + parent_num_ids() + n; }
 
   class IsUninitializedField
       : public BitField<bool, Expression::kNextBitFieldIndex, 1> {};
   class KeyTypeField
       : public BitField<IcCheckType, IsUninitializedField::kNext, 1> {};
   class StoreModeField
       : public BitField<KeyedAccessStoreMode, KeyTypeField::kNext, 3> {};
   class TokenField : public BitField<Token::Value, StoreModeField::kNext, 7> {};
+  class CollectTypeProfileSlotField
+      : public BitField<bool, TokenField::kNext, 1> {};
 
   FeedbackSlot slot_;
   Expression* target_;
   Expression* value_;
   BinaryOperation* binary_operation_;
   SmallMapList receiver_types_;
+
+  FeedbackSlot collect_type_profile_slot_;
 };
 
 
 // The RewritableExpression class is a wrapper for AST nodes that wait
 // for some potential rewriting.  However, even if such nodes are indeed
 // rewritten, the RewritableExpression wrapper nodes will survive in the
 // final AST and should be just ignored, i.e., they should be treated as
 // equivalent to the wrapped nodes.  For this reason and to simplify later
 // phases, RewritableExpressions are considered as exceptions of AST nodes
 // in the following sense:
@@ skipping 1186 matching lines @@
                                     : NULL;                                   \
   }
 AST_NODE_LIST(DECLARE_NODE_FUNCTIONS)
 #undef DECLARE_NODE_FUNCTIONS
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_AST_AST_H_