--- old/src/share/vm/compiler/compilerDirectives.hpp	2016-02-10 10:49:51.553356789 +0100
+++ new/src/share/vm/compiler/compilerDirectives.hpp	2016-02-10 10:49:51.393356782 +0100
@@ -34,7 +34,7 @@
 
   //      Directives flag name,    type, default value, compile command name
   #define compilerdirectives_common_flags(cflags) \
-    cflags(Enable,                  bool, false, X) \
+    cflags(Enable,                  bool, true, X) \
     cflags(Exclude,                 bool, false, X) \
     cflags(BreakAtExecute,          bool, false, X) \
     cflags(BreakAtCompile,          bool, false, X) \
@@ -117,6 +117,7 @@
   static DirectiveSet* clone(DirectiveSet const* src);
   bool is_intrinsic_disabled(methodHandle method);
   void finalize(outputStream* st);
+  bool is_default_set();
 
   typedef enum {
 #define enum_of_flags(name, type, dvalue, cc_flag) name##Index,
@@ -139,16 +140,19 @@
   compilerdirectives_c2_flags(set_function_definition)
   compilerdirectives_c1_flags(set_function_definition)
 
-  void print_intx(outputStream* st, ccstr n, intx v, bool mod) { if (mod) { st->print("%s:" INTX_FORMAT " ", n, v); } }
-  void print_bool(outputStream* st, ccstr n, bool v, bool mod) { if (mod) { st->print("%s:%s ", n, v ? "true" : "false"); } }
-  void print_double(outputStream* st, ccstr n, double v, bool mod) { if (mod) { st->print("%s:%f ", n, v); } }
-  void print_ccstr(outputStream* st, ccstr n, ccstr v, bool mod) { if (mod) { st->print("%s:%s ", n, v); } }
-  void print_ccstrlist(outputStream* st, ccstr n, ccstr v, bool mod) { print_ccstr(st, n, v, mod); }
-
-void print(outputStream* st) {
+  void print_intx(outputStream* st, ccstr n, intx v, intx dvalue) { if (v != dvalue) st->print("*"); st->print("%s:" INTX_FORMAT " ", n, v); }
+  void print_bool(outputStream* st, ccstr n, bool v, bool dvalue) { if (v != dvalue) st->print("*"); st->print("%s:%s ", n, v ? "true" : "false"); }
+  void print_double(outputStream* st, ccstr n, double v, double dvalue) { if (v != dvalue) st->print("*"); st->print("%s:%f ", n, v); }
+  void print_ccstr(outputStream* st, ccstr n, ccstr v, ccstr dvalue) { if (strcmp(v, dvalue)) st->print("*"); st->print("%s:%s ", n, v); }
+  void print_ccstrlist(outputStream* st, ccstr n, ccstr v, ccstr dvalue) { print_ccstr(st, n, v, dvalue); }
+
+  void print(outputStream* st) {
+    if (is_default_set()) {
+      st->print_cr("  default directive");
+    }
     print_inline(st);
     st->print("  ");
-#define print_function_definition(name, type, dvalue, cc_flag) print_##type(st, #name, this->name##Option, true);//(bool)_modified[name##Index]);
+#define print_function_definition(name, type, dvalue, cc_flag) print_##type(st, #name, this->name##Option, dvalue);
     compilerdirectives_common_flags(print_function_definition)
     compilerdirectives_c2_flags(print_function_definition)
     compilerdirectives_c1_flags(print_function_definition)