VM initialization refactoring.

src/ia32/cpu-ia32.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 24 matching lines @@
 
 #if defined(V8_TARGET_ARCH_IA32)
 
 #include "cpu.h"
 #include "macro-assembler.h"
 
 namespace v8 {
 namespace internal {
 
 void CPU::Setup() {
-  CpuFeatures* cpu_features = Isolate::Current()->cpu_features();
-  cpu_features->Clear();
-  cpu_features->Probe(true);
-  if (!cpu_features->IsSupported(SSE2) || Serializer::enabled()) {
-    V8::DisableCrankshaft();
-  }
+  CpuFeatures::Probe(true);
 }
 
 
+bool CPU::SupportsCrankshaft() {
+  return CpuFeatures::IsSupported(SSE2);
+}
+
+
 void CPU::FlushICache(void* start, size_t size) {
   // No need to flush the instruction cache on Intel. On Intel instruction
   // cache flushing is only necessary when multiple cores running the same
   // code simultaneously. V8 (and JavaScript) is single threaded and when code
   // is patched on an intel CPU the core performing the patching will have its
   // own instruction cache updated automatically.
 
   // If flushing of the instruction cache becomes necessary Windows has the
   // API function FlushInstructionCache.
 
@@ skipping 15 matching lines @@
   // __asm { int 3 }
   __debugbreak();
 #else
   asm("int $3");
 #endif
 }
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_IA32