Add --trace-hydrogen-filter flag.

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index c75a419072654a7a62e5863c0d61d7cbd768b674..0a014e49a51f30b7a2595df06b5a89402e96d66d 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -8299,6 +8299,16 @@ class String: public Name {
 
   void PrintOn(FILE* out);
 
+  // Used for flags such as --hydrogen-filter.
+  // The filter is a pattern that matches strings in this way:
+  //   "*"      all; the default
+  //   "-"      all but the empty string (e.g. top-level function's name)
+  //   "-name"  all but the string "name"
+  //   ""       only the empty string (e.g. top-level function's name)
+  //   "name"   only the string "name"
+  //   "name*"  only strings starting with "name"
+  bool PassesFilter(const char* raw_filter);

[Michael Starzinger, 2013/08/23 11:18:13]

IMHO this should be a method on JSFunction instead of on String.

[Jakob Kummerow, 2013/08/23 13:19:23]

Sounds reasonable. Done.

+
   // For use during stack traces.  Performs rudimentary sanity check.
   bool LooksValid();