Fix wraparound of deoptimization count in shared function info.

src/runtime-profiler.cc

 // 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 283 matching lines @@
 
     // Only record top-level code on top of the execution stack and
     // avoid optimizing excessively large scripts since top-level code
     // will be executed only once.
     const int kMaxToplevelSourceSize = 10 * 1024;
     if (shared->is_toplevel() &&
         (frame_count > 1 || shared->SourceSize() > kMaxToplevelSourceSize)) {
       continue;
     }
 
-    // Do not record non-optimizable functions.
+    // If a function has had optimization disabled, it might be temporary.
     if (shared->optimization_disabled()) {
-      if (shared->deopt_count() >= FLAG_max_opt_count) {
-        // If optimization was disabled due to many deoptimizations,
-        // then check if the function is hot and try to reenable optimization.
+      if (shared->too_many_deopts()) {
+        // The optimization was disabled because of too many deopts;
+        // check if the function is hot and try to reenable optimization.
         int ticks = shared_code->profiler_ticks();
         if (ticks >= kProfilerTicksBeforeReenablingOptimization) {
           shared_code->set_profiler_ticks(0);
           shared->TryReenableOptimization();
         } else {
           shared_code->set_profiler_ticks(ticks + 1);
         }
       }
       continue;
     }
@@ skipping 106 matching lines @@
 
 
 void RuntimeProfiler::UpdateSamplesAfterCompact(ObjectVisitor* visitor) {
   for (int i = 0; i < kSamplerWindowSize; i++) {
     visitor->VisitPointer(&sampler_window_[i]);
   }
 }
 
 
 } }  // namespace v8::internal