Remove unnecessary code for non-zero-length global regexps.

src/jsregexp.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 5883 matching lines @@
 
   // Inserted here, instead of in Assembler, because it depends on information
   // in the AST that isn't replicated in the Node structure.
   static const int kMaxBacksearchLimit = 1024;
   if (is_end_anchored &&
       !is_start_anchored &&
       max_length < kMaxBacksearchLimit) {
     macro_assembler.SetCurrentPositionFromEnd(max_length);
   }
 
-  macro_assembler.set_global(is_global);
+  if (is_global) {
+    macro_assembler.set_global_flag(
+        (data->tree->min_match() > 0)
+            ? RegExpMacroAssembler::GLOBAL_NO_ZERO_LENGTH_MATCH
+            : RegExpMacroAssembler::GLOBAL);
+  }
 
   return compiler.Assemble(&macro_assembler,
                            node,
                            data->capture_count,
                            pattern);
 }
 
 
 }}  // namespace v8::internal