Adding smi cache

src/parsing/scanner.h

 // 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.
 
 #ifndef V8_PARSING_SCANNER_H_
 #define V8_PARSING_SCANNER_H_
 
 #include "src/allocation.h"
@@ skipping 266 matching lines @@
   void clear_octal_position() { octal_pos_ = Location::invalid(); }
   // Returns the location of the last seen decimal literal with a leading zero.
   Location decimal_with_leading_zero_position() const {
     return decimal_with_leading_zero_pos_;
   }
   void clear_decimal_with_leading_zero_position() {
     decimal_with_leading_zero_pos_ = Location::invalid();
   }
 
   // Returns the value of the last smi that was scanned.
-  int smi_value() const { return current_.smi_value_; }
+  uint32_t smi_value() const { return current_.smi_value_; }
 
   // Seek forward to the given position.  This operation does not
   // work in general, for instance when there are pushed back
   // characters, but works for seeking forward until simple delimiter
   // tokens, which is what it is used for.
   void SeekForward(int pos);
 
   // Returns true if there was a line terminator before the peek'ed token,
   // possibly inside a multi-line comment.
   bool HasAnyLineTerminatorBeforeNext() const {
@@ skipping 182 matching lines @@
     Vector<byte> backing_store_;
 
     DISALLOW_COPY_AND_ASSIGN(LiteralBuffer);
   };
 
   // The current and look-ahead token.
   struct TokenDesc {
     Location location;
     LiteralBuffer* literal_chars;
     LiteralBuffer* raw_literal_chars;
-    int smi_value_;
+    uint32_t smi_value_;
     Token::Value token;
   };
 
   static const int kCharacterLookaheadBufferSize = 1;
   const int kMaxAscii = 127;
 
   // Scans octal escape sequence. Also accepts "\0" decimal escape sequence.
   template <bool capture_raw>
   uc32 ScanOctalEscape(uc32 c, int length);
 
@@ skipping 303 matching lines @@
   bool found_html_comment_;
 
   MessageTemplate::Template scanner_error_;
   Location scanner_error_location_;
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_PARSING_SCANNER_H_