RegExp bitmap test for word character.

src/regexp-macro-assembler.h

Index: src/regexp-macro-assembler.h
diff --git a/src/regexp-macro-assembler.h b/src/regexp-macro-assembler.h
index 7cc95110e39143754fac9a3c0c74e772ae1ee899..2e619bd15b9d50ec7ba791573b960098a777c06b 100644
--- a/src/regexp-macro-assembler.h
+++ b/src/regexp-macro-assembler.h
@@ -204,6 +204,15 @@ class NativeRegExpMacroAssembler: public RegExpMacroAssembler {
 
   static const byte* StringCharacterPosition(String* subject, int start_index);
 
+  // Byte map of ASCII characters with a 0xff if the character is a word
+  // character (digit, letter or underscore) and 0x00 otherwise.
+  // Used by generated RegExp code.
+  static byte word_character_map[128];
+
+  static Address word_character_map_address() {
+    return &word_character_map[0];
+  }
+
   static Result Execute(Code* code,
                         String* input,
                         int start_offset,