Profiler experiments: be more careful when accessing TypeFeedbackInfo

Review URL: https://chromiumcodereview.appspot.com/9471008

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10835 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/ic.cc

@@ -315,6 +315,8 @@ void IC::PostPatching(Address address, Code* target, Code* old_target) {
       if (delta != 0) {
         Code* host = target->GetHeap()->isolate()->
             inner_pointer_to_code_cache()->GetCacheEntry(address)->code;
+        // Not all Code objects have TypeFeedbackInfo.
+        if (host->type_feedback_info()->IsTypeFeedbackInfo()) {
           TypeFeedbackInfo* info =
               TypeFeedbackInfo::cast(host->type_feedback_info());
           info->set_ic_with_typeinfo_count(
@@ -322,6 +324,7 @@ void IC::PostPatching(Address address, Code* target, Code* old_target) {
         }
       }
     }
+  }
   if (FLAG_watch_ic_patching) {
     Isolate::Current()->runtime_profiler()->NotifyICChanged();
     // We do not want to optimize until the ICs have settled down,