Remove unique static RegExpEmpty instance.

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 93 matching lines @@
 void RegExpBuilder::NewAlternative() {
   FlushTerms();
 }
 
 
 void RegExpBuilder::FlushTerms() {
   FlushText();
   int num_terms = terms_.length();
   RegExpTree* alternative;
   if (num_terms == 0) {
-    alternative = RegExpEmpty::GetInstance();
+    alternative = new (zone()) RegExpEmpty();
   } else if (num_terms == 1) {
     alternative = terms_.last();
   } else {
     alternative = new(zone()) RegExpAlternative(terms_.GetList(zone()));
   }
   alternatives_.Add(alternative, zone());
   terms_.Clear();
   LAST(ADD_NONE);
 }
 
 
 RegExpTree* RegExpBuilder::ToRegExp() {
   FlushTerms();
   int num_alternatives = alternatives_.length();
-  if (num_alternatives == 0) {
-    return RegExpEmpty::GetInstance();
-  }
-  if (num_alternatives == 1) {
-    return alternatives_.last();
-  }
+  if (num_alternatives == 0) return new (zone()) RegExpEmpty();
+  if (num_alternatives == 1) return alternatives_.last();
   return new(zone()) RegExpDisjunction(alternatives_.GetList(zone()));
 }
 
 
 void RegExpBuilder::AddQuantifierToAtom(
     int min, int max, RegExpQuantifier::QuantifierType quantifier_type) {
   if (pending_empty_) {
     pending_empty_ = false;
     return;
   }
@@ skipping 4883 matching lines @@
 
   // We cannot internalize on a background thread; a foreground task will take
   // care of calling Parser::Internalize just before compilation.
 
   if (compile_options() == ScriptCompiler::kProduceParserCache) {
     if (result != NULL) *info_->cached_data() = recorder.GetScriptData();
     log_ = NULL;
   }
 }
 } }  // namespace v8::internal