Parallel recompilation: fewer handle dereferences and tighter checks.

src/optimizing-compiler-thread.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 58 matching lines @@
     CompileNext();
 
     if (FLAG_trace_parallel_recompilation) {
       time_spent_compiling_ += OS::Ticks() - compiling_start;
     }
   }
 }
 
 
 void OptimizingCompilerThread::CompileNext() {
-  Heap::RelocationLock relocation_lock(isolate_->heap());
   OptimizingCompiler* optimizing_compiler = NULL;
   input_queue_.Dequeue(&optimizing_compiler);
   Barrier_AtomicIncrement(&queue_length_, static_cast<Atomic32>(-1));
 
   ASSERT(optimizing_compiler->info()->closure()->IsInRecompileQueue());
 
   OptimizingCompiler::Status status = optimizing_compiler->OptimizeGraph();
   ASSERT(status != OptimizingCompiler::FAILED);
   // Prevent an unused-variable error in release mode.
   USE(status);
@@ skipping 80 matching lines @@
 
 #ifdef DEBUG
 bool OptimizingCompilerThread::IsOptimizerThread() {
   if (!FLAG_parallel_recompilation) return false;
   return ThreadId::Current().ToInteger() == thread_id_;
 }
 #endif
 
 
 } }  // namespace v8::internal