Version 3.6.5

src/ast.h

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 72 matching lines @@
   V(Assignment)                                 \
   V(Throw)                                      \
   V(Property)                                   \
   V(Call)                                       \
   V(CallNew)                                    \
   V(CallRuntime)                                \
   V(UnaryOperation)                             \
   V(CountOperation)                             \
   V(BinaryOperation)                            \
   V(CompareOperation)                           \
-  V(CompareToNull)                              \
   V(ThisFunction)
 
 #define AST_NODE_LIST(V)                        \
   V(Declaration)                                \
   STATEMENT_NODE_LIST(V)                        \
   EXPRESSION_NODE_LIST(V)
 
 // Forward declarations
 class BitVector;
 class DefinitionInfo;
@@ skipping 178 matching lines @@
   // (faster) prefix increments.
   virtual void MarkAsStatement() { /* do nothing */ }
 
   // True iff the result can be safely overwritten (to avoid allocation).
   // False for operations that can return one of their operands.
   virtual bool ResultOverwriteAllowed() { return false; }
 
   // True iff the expression is a literal represented as a smi.
   virtual bool IsSmiLiteral() { return false; }
 
+  // True iff the expression is a string literal.
+  virtual bool IsStringLiteral() { return false; }
+
+  // True iff the expression is the null literal.
+  virtual bool IsNullLiteral() { return false; }
+
   // Type feedback information for assignments and properties.
   virtual bool IsMonomorphic() {
     UNREACHABLE();
     return false;
   }
   virtual bool IsArrayLength() {
     UNREACHABLE();
     return false;
   }
   virtual SmallMapList* GetReceiverTypes() {
@@ skipping 582 matching lines @@
 
 class Literal: public Expression {
  public:
   Literal(Isolate* isolate, Handle<Object> handle)
       : Expression(isolate), handle_(handle) { }
 
   DECLARE_NODE_TYPE(Literal)
 
   virtual bool IsTrivial() { return true; }
   virtual bool IsSmiLiteral() { return handle_->IsSmi(); }
+  virtual bool IsStringLiteral() { return handle_->IsString(); }
+  virtual bool IsNullLiteral() { return handle_->IsNull(); }
 
   // Check if this literal is identical to the other literal.
   bool IsIdenticalTo(const Literal* other) const {
     return handle_.is_identical_to(other->handle_);
   }
 
   virtual bool IsPropertyName() {
     if (handle_->IsSymbol()) {
       uint32_t ignored;
       return !String::cast(*handle_)->AsArrayIndex(&ignored);
@@ skipping 554 matching lines @@
   virtual bool IsInlineable() const;
 
   // Type feedback information.
   void RecordTypeFeedback(TypeFeedbackOracle* oracle);
   bool IsSmiCompare() { return compare_type_ == SMI_ONLY; }
   bool IsObjectCompare() { return compare_type_ == OBJECT_ONLY; }
 
   // Match special cases.
   bool IsLiteralCompareTypeof(Expression** expr, Handle<String>* check);
   bool IsLiteralCompareUndefined(Expression** expr);
+  bool IsLiteralCompareNull(Expression** expr);
 
  private:
   Token::Value op_;
   Expression* left_;
   Expression* right_;
   int pos_;
 
   enum CompareTypeFeedback { NONE, SMI_ONLY, OBJECT_ONLY };
   CompareTypeFeedback compare_type_;
 };
 
 
-class CompareToNull: public Expression {
- public:
-  CompareToNull(Isolate* isolate, bool is_strict, Expression* expression)
-      : Expression(isolate), is_strict_(is_strict), expression_(expression) { }
-
-  DECLARE_NODE_TYPE(CompareToNull)
-
-  virtual bool IsInlineable() const;
-
-  bool is_strict() const { return is_strict_; }
-  Token::Value op() const { return is_strict_ ? Token::EQ_STRICT : Token::EQ; }
-  Expression* expression() const { return expression_; }
-
- private:
-  bool is_strict_;
-  Expression* expression_;
-};
-
-
 class Conditional: public Expression {
  public:
   Conditional(Isolate* isolate,
               Expression* condition,
               Expression* then_expression,
               Expression* else_expression,
               int then_expression_position,
               int else_expression_position)
       : Expression(isolate),
         condition_(condition),
@@ skipping 631 matching lines @@
 
  private:
   Isolate* isolate_;
   bool stack_overflow_;
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_AST_H_