Fix valgrind warnings.

src/optimizing-compiler-thread.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 26 matching lines @@
 namespace internal {
 
 class HGraphBuilder;
 class OptimizingCompiler;
 class SharedFunctionInfo;
 
 class OptimizingCompilerThread : public Thread {
  public:
   explicit OptimizingCompilerThread(Isolate *isolate) :
       Thread("OptimizingCompilerThread"),
+#ifdef DEBUG
+      thread_id_(0),

[Yang, 2012/11/23 15:46:20]

Initialize this to make valgrind happy.

+#endif
       isolate_(isolate),
       stop_semaphore_(OS::CreateSemaphore(0)),
       input_queue_semaphore_(OS::CreateSemaphore(0)),
       output_queue_semaphore_(OS::CreateSemaphore(0)),
       time_spent_compiling_(0),
       time_spent_total_(0) {
     NoBarrier_Store(&stop_thread_, static_cast<AtomicWord>(false));
     NoBarrier_Store(&queue_length_, static_cast<AtomicWord>(0));
   }
 
@@ skipping 17 matching lines @@
     // doesn't introduce a race -- queue_length_ may decreased in
     // meantime, but not increased.
     return (current_length < FLAG_parallel_recompilation_queue_length);
   }
 
 #ifdef DEBUG
   bool IsOptimizerThread();
 #endif
 
   ~OptimizingCompilerThread() {
+    delete output_queue_semaphore_;  // Only used for manual mode.
     delete input_queue_semaphore_;
-    delete output_queue_semaphore_;  // Only used for manual mode.
     delete stop_semaphore_;
   }
 
  private:
+#ifdef DEBUG
+  int thread_id_;
+#endif
+
   Isolate* isolate_;
   Semaphore* stop_semaphore_;
   Semaphore* input_queue_semaphore_;
   Semaphore* output_queue_semaphore_;
   UnboundQueue<OptimizingCompiler*> input_queue_;
   UnboundQueue<OptimizingCompiler*> output_queue_;
   volatile AtomicWord stop_thread_;
   volatile Atomic32 queue_length_;
   int64_t time_spent_compiling_;
   int64_t time_spent_total_;
-
-#ifdef DEBUG
-  int thread_id_;
-#endif
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_OPTIMIZING_COMPILER_THREAD_H_