Parallel recompilation: fewer handle dereferences and tighter checks.

src/v8.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 250 matching lines @@
   return heap_number;
 }
 
 void V8::InitializeOncePerProcessImpl() {
   FlagList::EnforceFlagImplications();
   if (FLAG_stress_compaction) {
     FLAG_force_marking_deque_overflows = true;
     FLAG_gc_global = true;
     FLAG_max_new_space_size = (1 << (kPageSizeBits - 10)) * 2;
   }
+  if (FLAG_trace_hydrogen) FLAG_parallel_recompilation = false;
   OS::SetUp();
   CPU::SetUp();
   use_crankshaft_ = FLAG_crankshaft
       && !Serializer::enabled()
       && CPU::SupportsCrankshaft();
   OS::PostSetUp();
   RuntimeProfiler::GlobalSetUp();
   ElementsAccessor::InitializeOncePerProcess();
   LOperand::SetUpCaches();
   SetUpJSCallerSavedCodeData();
   SamplerRegistry::SetUp();
   ExternalReference::SetUp();
 }
 
 void V8::InitializeOncePerProcess() {
   CallOnce(&init_once, &InitializeOncePerProcessImpl);
 }
 
 } }  // namespace v8::internal