*** old/src/share/vm/runtime/arguments.cpp	Fri Apr 15 17:12:59 2016
--- new/src/share/vm/runtime/arguments.cpp	Fri Apr 15 17:12:59 2016

*** 4512,4521 ****
--- 4512,4526 ----
  
    if (FLAG_IS_CMDLINE(CompressedClassSpaceSize) && !UseCompressedClassPointers) {
      warning("Setting CompressedClassSpaceSize has no effect when compressed class pointers are not used");
    }
  
+   if (UseOnStackReplacement && !UseLoopCounter) {
+     warning("On-stack-replacement requires loop counters; enabling loop counters");
+     FLAG_SET_DEFAULT(UseLoopCounter, true);
+   }
+ 
  #ifndef PRODUCT
    if (!LogVMOutput && FLAG_IS_DEFAULT(LogVMOutput)) {
      if (use_vm_log()) {
        LogVMOutput = true;
      }