Support placement new syntax for zone objects and start using it in the parser.

Review URL: http://codereview.chromium.org/6771058

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@7489 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/parser.h

@@ -280,6 +280,9 @@ class RegExpBuilder: public ZoneObject {
   void FlushCharacters();
   void FlushText();
   void FlushTerms();
+  Zone* zone() { return zone_; }
+
+  Zone* zone_;
   bool pending_empty_;
   ZoneList<uc16>* characters_;
   BufferedZoneList<RegExpTree, 2> terms_;
@@ -389,6 +392,7 @@ class RegExpParser {
   };
 
   Isolate* isolate() { return isolate_; }
+  Zone* zone() { return isolate_->zone(); }
 
   uc32 current() { return current_; }
   bool has_more() { return has_more_; }
@@ -453,6 +457,7 @@ class Parser {
   };
 
   Isolate* isolate() { return isolate_; }
+  Zone* zone() { return isolate_->zone(); }
 
   // Called by ParseProgram after setting up the scanner.
   FunctionLiteral* DoParseProgram(Handle<String> source,

src/zone-inl.h

@@ -97,6 +97,10 @@ void* ZoneObject::operator new(size_t size) {
   return ZONE->New(static_cast<int>(size));
 }
 
+void* ZoneObject::operator new(size_t size, Zone* zone) {
+  return zone->New(static_cast<int>(size));
+}
+
 
 inline void* ZoneListAllocationPolicy::New(int size) {
   return ZONE->New(size);

src/zone.h

@@ -133,6 +133,7 @@ class ZoneObject {
  public:
   // Allocate a new ZoneObject of 'size' bytes in the Zone.
   inline void* operator new(size_t size);
+  inline void* operator new(size_t size, Zone* zone);
 
   // Ideally, the delete operator should be private instead of
   // public, but unfortunately the compiler sometimes synthesizes