Add support for enabling DCHECKs in release mode

src/parser.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/v8.h"
 
 #include "src/api.h"
 #include "src/ast.h"
 #include "src/bailout-reason.h"
 #include "src/base/platform/platform.h"
@@ skipping 11 matching lines @@
 
 namespace v8 {
 namespace internal {
 
 RegExpBuilder::RegExpBuilder(Zone* zone)
     : zone_(zone),
       pending_empty_(false),
       characters_(NULL),
       terms_(),
       alternatives_()
-#ifdef DEBUG
-    , last_added_(ADD_NONE)
+#if DCHECK_IS_ON
+      ,
+      last_added_(ADD_NONE)
 #endif
-  {}
+{
+}
 
 
 void RegExpBuilder::FlushCharacters() {
   pending_empty_ = false;
   if (characters_ != NULL) {
     RegExpTree* atom = new(zone()) RegExpAtom(characters_->ToConstVector());
     characters_ = NULL;
     text_.Add(atom, zone());
     LAST(ADD_ATOM);
   }
@@ skipping 4652 matching lines @@
     } else if (FLAG_regexp_possessive_quantifier && current() == '+') {
       // FLAG_regexp_possessive_quantifier is a debug-only flag.
       quantifier_type = RegExpQuantifier::POSSESSIVE;
       Advance();
     }
     builder->AddQuantifierToAtom(min, max, quantifier_type);
   }
 }
 
 
-#ifdef DEBUG
+#if DCHECK_IS_ON
 // Currently only used in an DCHECK.
 static bool IsSpecialClassEscape(uc32 c) {
   switch (c) {
     case 'd': case 'D':
     case 's': case 'S':
     case 'w': case 'W':
       return true;
     default:
       return false;
   }
@@ skipping 622 matching lines @@
   }
 
   // Hash key is used exclusively by template call site caching. There are no
   // real security implications for unseeded hashes, and no issues with changing
   // the hashing algorithm to improve performance or entropy.
   *hash = running_hash;
 
   return raw_strings;
 }
 } }  // namespace v8::internal