Make the AstValueFactory more efficient and less memory hungry

src/ast/ast.cc

 // 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.
 
 #include "src/ast/ast.h"
 
 #include <cmath>  // For isfinite.
 
 #include "src/ast/prettyprinter.h"
 #include "src/ast/scopes.h"
@@ skipping 56 matching lines @@
 
 bool Expression::IsSmiLiteral() const {
   return IsLiteral() && AsLiteral()->value()->IsSmi();
 }
 
 
 bool Expression::IsStringLiteral() const {
   return IsLiteral() && AsLiteral()->value()->IsString();
 }
 
-bool Expression::IsPropertyName(HandleDereferenceMode deref_mode) const {
-  return IsLiteral() && AsLiteral()->IsPropertyName(deref_mode);
+bool Expression::IsPropertyName() const {
+  return IsLiteral() && AsLiteral()->IsPropertyName();
 }
 
 bool Expression::IsNullLiteral() const {
   if (!IsLiteral()) return false;
   return AsLiteral()->raw_value()->IsNull();
 }
 
 bool Expression::IsUndefinedLiteral() const {
   if (IsLiteral()) {
     if (AsLiteral()->raw_value()->IsUndefined()) {
@@ skipping 837 matching lines @@
     } else if (proxy->var()->IsLookupSlot()) {
       return LOOKUP_SLOT_CALL;
     }
   }
 
   if (expression()->IsSuperCallReference()) return SUPER_CALL;
 
   Property* property = expression()->AsProperty();
   if (property != nullptr) {
     bool is_super = property->IsSuperAccess();
-    if (property->key()->IsPropertyName(deref_mode)) {
+    if (property->key()->IsPropertyName()) {
       return is_super ? NAMED_SUPER_PROPERTY_CALL : NAMED_PROPERTY_CALL;
     } else {
       return is_super ? KEYED_SUPER_PROPERTY_CALL : KEYED_PROPERTY_CALL;
     }
   }
 
   return OTHER_CALL;
 }
 
 
@@ skipping 14 matching lines @@
 // static
 bool Literal::Match(void* literal1, void* literal2) {
   const AstValue* x = static_cast<Literal*>(literal1)->raw_value();
   const AstValue* y = static_cast<Literal*>(literal2)->raw_value();
   return (x->IsString() && y->IsString() && x->AsString() == y->AsString()) ||
          (x->IsNumber() && y->IsNumber() && x->AsNumber() == y->AsNumber());
 }
 
 }  // namespace internal
 }  // namespace v8