Add --trace-hydrogen-filter flag.

src/objects.h

 // 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 8281 matching lines @@
   bool MakeExternal(v8::String::ExternalAsciiStringResource* resource);
 
   // Conversion.
   inline bool AsArrayIndex(uint32_t* index);
 
   // Casting.
   static inline String* cast(Object* obj);
 
   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();
 
   // Dispatched behavior.
   void StringShortPrint(StringStream* accumulator);
 #ifdef OBJECT_PRINT
   inline void StringPrint() {
     StringPrint(stdout);
   }
   void StringPrint(FILE* out);
@@ skipping 1874 matching lines @@
     } else {
       value &= ~(1 << bit_position);
     }
     return value;
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_H_