A64: Synchronize with r16849.

src/a64/cpu-a64.cc

 // Copyright 2013 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 23 matching lines @@
 #include "a64/cpu-a64.h"
 #include "a64/utils-a64.h"
 
 namespace v8 {
 namespace internal {
 
 #ifdef DEBUG
 bool CpuFeatures::initialized_ = false;
 #endif
 unsigned CpuFeatures::supported_ = 0;
-
+unsigned CpuFeatures::found_by_runtime_probing_only_ = 0;
 
 // Initialise to smallest possible cache size.
 unsigned CpuFeatures::dcache_line_size_ = 1;
 unsigned CpuFeatures::icache_line_size_ = 1;
 
 
 void CPU::SetUp() {
   CpuFeatures::Probe();
 }
 
@@ skipping 134 matching lines @@
   // Copy the content of the cache type register to a core register.
   __asm__ __volatile__ ("mrs %[ctr], ctr_el0"  // NOLINT
                         : [ctr] "=r" (cache_type_register));
   return cache_type_register;
 #endif
 }
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_A64