Patch (SSE3) for faster To(U)Int32 conversion in bit

src/v8.cc

 // Copyright 2006-2008 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 33 matching lines @@
   has_been_setup_ = true;
 #ifdef DEBUG
   // The initialization process does not handle memory exhaustion.
   DisallowAllocationFailure disallow_allocation_failure;
 #endif
 
   // Enable logging before setting up the heap
   Logger::Setup();
   if (des) des->GetLog();
 
-  // Setup the CPU support.
-  CPU::Setup();
-
   // Setup the platform OS support.
   OS::Setup();
 
   // Setup the object heap
   ASSERT(!Heap::HasBeenSetup());
   if (!Heap::Setup(create_heap_objects)) {
     has_been_setup_ = false;
     return false;
   }
 
   // Initialize other runtime facilities
   Bootstrapper::Initialize(create_heap_objects);
   Builtins::Setup(create_heap_objects);
   Top::Initialize();
 
   if (FLAG_preemption) {
     v8::Locker locker;
     v8::Locker::StartPreemption(100);
   }
 
   Debug::Setup(create_heap_objects);
   StubCache::Initialize(create_heap_objects);
 
   // If we are deserializing, read the state into the now-empty heap.
   if (des != NULL) {
     des->Deserialize();
     StubCache::Clear();
   }
 
+  // Setup the CPU support. Must be done after heap setup and after
+  // any deserialization because we have to have the initial heap
+  // objects in place for creating the code object used for probin.

[Mads Ager (chromium), 2009/02/25 14:34:05]

probin -> probing.

+  CPU::Setup();
+
   return true;
 }
 
 
 void V8::TearDown() {
   if (HasBeenDisposed()) return;
   if (!HasBeenSetup()) return;
 
   if (FLAG_preemption) {
     v8::Locker locker;
     v8::Locker::StopPreemption();
   }
 
   Builtins::TearDown();
   Bootstrapper::TearDown();
 
   Top::TearDown();
 
   Heap::TearDown();
   Logger::TearDown();
 
   has_been_setup_ = false;
   has_been_disposed_ = true;
 }
 
 } }  // namespace v8::internal