Make sure that canonical NaN is also platform NaN.

src/objects-inl.h

 // Copyright 2011 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 1603 matching lines @@
   return BitCast<uint64_t, double>(value) == kHoleNanInt64;
 }
 
 
 inline double FixedDoubleArray::hole_nan_as_double() {
   return BitCast<double, uint64_t>(kHoleNanInt64);
 }
 
 
 inline double FixedDoubleArray::canonical_not_the_hole_nan_as_double() {
-  return BitCast<double, uint64_t>(kCanonicalNonHoleNanInt64);
+  ASSERT(BitCast<uint64_t>(OS::nan_value()) != kHoleNanInt64);
+  ASSERT((BitCast<uint64_t>(OS::nan_value()) >> 32) != kHoleNanUpper32);
+  return OS::nan_value();
 }
 
 
 double FixedDoubleArray::get(int index) {
   ASSERT(map() != HEAP->fixed_cow_array_map() &&
          map() != HEAP->fixed_array_map());
   ASSERT(index >= 0 && index < this->length());
   double result = READ_DOUBLE_FIELD(this, kHeaderSize + index * kDoubleSize);
   ASSERT(!is_the_hole_nan(result));
   return result;
@@ skipping 2826 matching lines @@
 #undef WRITE_INT_FIELD
 #undef READ_SHORT_FIELD
 #undef WRITE_SHORT_FIELD
 #undef READ_BYTE_FIELD
 #undef WRITE_BYTE_FIELD
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_INL_H_