Reduce the memory footprint of expression classifiers

src/parsing/preparser.cc

 // Copyright 2011 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 <cmath>
 
 #include "src/allocation.h"
 #include "src/base/logging.h"
 #include "src/conversions-inl.h"
 #include "src/conversions.h"
@@ skipping 611 matching lines @@
   //   Identifier ':' Statement
 
   switch (peek()) {
     case Token::FUNCTION:
     case Token::LBRACE:
       UNREACHABLE();  // Always handled by the callers.
     case Token::CLASS:
       ReportUnexpectedToken(Next());
       *ok = false;
       return Statement::Default();
-

[adamk, 2016/06/06 20:51:02]

Looks like you've got a spurious whitespace change here, if you revert it this
file needn't be touched in this change.

[nickie, 2016/06/08 11:38:46]

Reverting it.

     default:
       break;
   }
 
   bool starts_with_identifier = peek_any_identifier();
   ExpressionClassifier classifier(this);
   Expression expr = ParseExpression(true, &classifier, CHECK_OK);
   ValidateExpression(&classifier, CHECK_OK);
 
   // Even if the expression starts with an identifier, it is not necessarily an
@@ skipping 664 matching lines @@
   if (!*ok) return;
 
   body->Add(PreParserStatement::ExpressionStatement(return_value), zone());
 }
 
 #undef CHECK_OK
 
 
 }  // namespace internal
 }  // namespace v8