Parser: Delay internalizing strings and values.

src/scanner.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.
 
 // Features shared by parsing and pre-parsing scanners.
 
 #include <cmath>
 
 #include "src/scanner.h"
 
 #include "include/v8stdint.h"
+#include "src/ast-value-factory.h"
 #include "src/char-predicates-inl.h"
 #include "src/conversions-inl.h"
 #include "src/list-inl.h"
 #include "src/v8.h"
 #include "src/parser.h"
 
 namespace v8 {
 namespace internal {
 
 // ----------------------------------------------------------------------------
@@ skipping 1064 matching lines @@
       Advance();
     }
   }
   literal.Complete();
 
   next_.location.end_pos = source_pos() - 1;
   return true;
 }
 
 
-Handle<String> Scanner::AllocateNextLiteralString(Isolate* isolate,
-                                                  PretenureFlag tenured) {
-  if (is_next_literal_one_byte()) {
-    return isolate->factory()->NewStringFromOneByte(
-        next_literal_one_byte_string(), tenured).ToHandleChecked();
-  } else {
-    return isolate->factory()->NewStringFromTwoByte(
-        next_literal_two_byte_string(), tenured).ToHandleChecked();
+const AstString* Scanner::CurrentSymbol(AstValueFactory* ast_value_factory) {
+  if (is_literal_one_byte()) {
+    return ast_value_factory->GetOneByteString(literal_one_byte_string());
   }
+  return ast_value_factory->GetTwoByteString(literal_two_byte_string());
 }
 
 
-Handle<String> Scanner::AllocateInternalizedString(Isolate* isolate) {
-  if (is_literal_one_byte()) {
-    return isolate->factory()->InternalizeOneByteString(
-        literal_one_byte_string());
-  } else {
-    return isolate->factory()->InternalizeTwoByteString(
-        literal_two_byte_string());
+const AstString* Scanner::NextSymbol(AstValueFactory* ast_value_factory) {
+  if (is_next_literal_one_byte()) {
+    return ast_value_factory->GetOneByteString(next_literal_one_byte_string());
   }
+  return ast_value_factory->GetTwoByteString(next_literal_two_byte_string());
 }
 
 
 double Scanner::DoubleValue() {
   ASSERT(is_literal_one_byte());
   return StringToDouble(
       unicode_cache_,
       literal_one_byte_string(),
       ALLOW_HEX | ALLOW_OCTAL | ALLOW_IMPLICIT_OCTAL | ALLOW_BINARY);
 }
@@ skipping 145 matching lines @@
     }
     backing_store_.Add(static_cast<uint8_t>((one_byte_length >> 7) | 0x80u));
   }
   backing_store_.Add(static_cast<uint8_t>(one_byte_length & 0x7f));
 
   backing_store_.AddBlock(bytes);
   return backing_store_.EndSequence().start();
 }
 
 } }  // namespace v8::internal