Refactor class declaration logic to the parser and runtime

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-value-factory.h"
 #include "src/ast/modules.h"
 #include "src/ast/variables.h"
@@ skipping 46 matching lines @@
   V(WhileStatement)               \
   V(ForStatement)                 \
   V(ForInStatement)               \
   V(ForOfStatement)               \
   V(TryCatchStatement)            \
   V(TryFinallyStatement)          \
   V(DebuggerStatement)
 
 #define EXPRESSION_NODE_LIST(V) \
   V(FunctionLiteral)            \
-  V(ClassLiteral)               \
   V(NativeFunctionLiteral)      \
   V(Conditional)                \
   V(VariableProxy)              \
   V(Literal)                    \
   V(RegExpLiteral)              \
   V(ObjectLiteral)              \
   V(ArrayLiteral)               \
   V(Assignment)                 \
   V(Yield)                      \
   V(Throw)                      \
@@ skipping 396 matching lines @@
 
 
 class DoExpression final : public Expression {
  public:
   DECLARE_NODE_TYPE(DoExpression)
 
   Block* block() { return block_; }
   void set_block(Block* b) { block_ = b; }
   VariableProxy* result() { return result_; }
   void set_result(VariableProxy* v) { result_ = v; }
+  FunctionLiteral* represented_function() { return represented_function_; }
+  void set_represented_function(FunctionLiteral* f) {
+    represented_function_ = f;
+  }
+
+  bool IsAnonymousFunctionDefinition() const final;
 
  protected:
   DoExpression(Zone* zone, Block* block, VariableProxy* result, int pos)
-      : Expression(zone, pos), block_(block), result_(result) {
+      : Expression(zone, pos),
+        block_(block),
+        result_(result),
+        represented_function_(nullptr) {
     DCHECK_NOT_NULL(block_);
     DCHECK_NOT_NULL(result_);
   }
   static int parent_num_ids() { return Expression::num_ids(); }
 
  private:
   int local_id(int n) const { return base_id() + parent_num_ids() + n; }
 
   Block* block_;
   VariableProxy* result_;
+  FunctionLiteral* represented_function_;
 };
 
 
 class Declaration : public AstNode {
  public:
   VariableProxy* proxy() const { return proxy_; }
   VariableMode mode() const { return mode_; }
   Scope* scope() const { return scope_; }
   virtual InitializationFlag initialization() const = 0;
 
@@ skipping 2241 matching lines @@
   BailoutReason dont_optimize_reason_;
 
   int materialized_literal_count_;
   int expected_property_count_;
   int parameter_count_;
   int function_token_position_;
   int yield_count_;
 };
 
 
-class ClassLiteral final : public Expression {
- public:
-  typedef ObjectLiteralProperty Property;
-
-  DECLARE_NODE_TYPE(ClassLiteral)
-
-  Scope* scope() const { return scope_; }
-  VariableProxy* class_variable_proxy() const { return class_variable_proxy_; }
-  Expression* extends() const { return extends_; }
-  void set_extends(Expression* e) { extends_ = e; }
-  FunctionLiteral* constructor() const { return constructor_; }
-  void set_constructor(FunctionLiteral* f) { constructor_ = f; }
-  ZoneList<Property*>* properties() const { return properties_; }
-  int start_position() const { return position(); }
-  int end_position() const { return end_position_; }
-
-  BailoutId EntryId() const { return BailoutId(local_id(0)); }
-  BailoutId DeclsId() const { return BailoutId(local_id(1)); }
-  BailoutId ExitId() { return BailoutId(local_id(2)); }
-  BailoutId CreateLiteralId() const { return BailoutId(local_id(3)); }
-  BailoutId PrototypeId() { return BailoutId(local_id(4)); }
-
-  // Return an AST id for a property that is used in simulate instructions.
-  BailoutId GetIdForProperty(int i) { return BailoutId(local_id(i + 5)); }
-
-  // Unlike other AST nodes, this number of bailout IDs allocated for an
-  // ClassLiteral can vary, so num_ids() is not a static method.
-  int num_ids() const { return parent_num_ids() + 5 + properties()->length(); }
-
-  // Object literals need one feedback slot for each non-trivial value, as well
-  // as some slots for home objects.
-  void AssignFeedbackVectorSlots(Isolate* isolate, FeedbackVectorSpec* spec,
-                                 FeedbackVectorSlotCache* cache);
-
-  bool NeedsProxySlot() const {
-    return class_variable_proxy() != nullptr &&
-           class_variable_proxy()->var()->IsUnallocated();
-  }
-
-  FeedbackVectorSlot PrototypeSlot() const { return prototype_slot_; }
-  FeedbackVectorSlot ProxySlot() const { return proxy_slot_; }
-
-  bool IsAnonymousFunctionDefinition() const final {
-    return constructor()->raw_name()->length() == 0;
-  }
-
- protected:
-  ClassLiteral(Zone* zone, Scope* scope, VariableProxy* class_variable_proxy,
-               Expression* extends, FunctionLiteral* constructor,
-               ZoneList<Property*>* properties, int start_position,
-               int end_position)
-      : Expression(zone, start_position),
-        scope_(scope),
-        class_variable_proxy_(class_variable_proxy),
-        extends_(extends),
-        constructor_(constructor),
-        properties_(properties),
-        end_position_(end_position) {}
-
-  static int parent_num_ids() { return Expression::num_ids(); }
-
- private:
-  int local_id(int n) const { return base_id() + parent_num_ids() + n; }
-
-  Scope* scope_;
-  VariableProxy* class_variable_proxy_;
-  Expression* extends_;
-  FunctionLiteral* constructor_;
-  ZoneList<Property*>* properties_;
-  int end_position_;
-  FeedbackVectorSlot prototype_slot_;
-  FeedbackVectorSlot proxy_slot_;
-};
-
-
 class NativeFunctionLiteral final : public Expression {
  public:
   DECLARE_NODE_TYPE(NativeFunctionLiteral)
 
   Handle<String> name() const { return name_->string(); }
   v8::Extension* extension() const { return extension_; }
 
  protected:
   NativeFunctionLiteral(Zone* zone, const AstRawString* name,
                         v8::Extension* extension, int pos)
@@ skipping 602 matching lines @@
       int expected_property_count) {
     return new (parser_zone_) FunctionLiteral(
         parser_zone_, ast_value_factory_->empty_string(), ast_value_factory_,
         scope, body, materialized_literal_count, expected_property_count, 0,
         FunctionLiteral::kAnonymousExpression,
         FunctionLiteral::kNoDuplicateParameters,
         FunctionLiteral::kShouldLazyCompile, FunctionKind::kNormalFunction, 0,
         false);
   }
 
-  ClassLiteral* NewClassLiteral(Scope* scope, VariableProxy* proxy,
-                                Expression* extends,
-                                FunctionLiteral* constructor,
-                                ZoneList<ObjectLiteral::Property*>* properties,
-                                int start_position, int end_position) {
-    return new (parser_zone_)
-        ClassLiteral(parser_zone_, scope, proxy, extends, constructor,
-                     properties, start_position, end_position);
-  }
-
   NativeFunctionLiteral* NewNativeFunctionLiteral(const AstRawString* name,
                                                   v8::Extension* extension,
                                                   int pos) {
     return new (parser_zone_)
         NativeFunctionLiteral(parser_zone_, name, extension, pos);
   }
 
   DoExpression* NewDoExpression(Block* block, Variable* result_var, int pos) {
     VariableProxy* result = NewVariableProxy(result_var, pos);
     return new (parser_zone_) DoExpression(parser_zone_, block, result, pos);
@@ skipping 91 matching lines @@
                                     : NULL;                                   \
   }
 AST_NODE_LIST(DECLARE_NODE_FUNCTIONS)
 #undef DECLARE_NODE_FUNCTIONS
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_AST_AST_H_