[turbofan] Properly represent the float64 hole.

src/deoptimizer.cc

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/deoptimizer.h"
 
 #include <memory>
 
 #include "src/accessors.h"
 #include "src/assembler-inl.h"
@@ skipping 3053 matching lines @@
       value_ = Handle<Object>(isolate()->factory()->NewNumber(uint32_value()));
       return;
 
     case kFloat: {
       double scalar_value = float_value().get_scalar();
       value_ = Handle<Object>(isolate()->factory()->NewNumber(scalar_value));
       return;
     }
 
     case kDouble: {
-      if (double_value().is_hole_nan()) {
-        value_ = isolate()->factory()->hole_nan_value();
-        return;
-      }
       double scalar_value = double_value().get_scalar();
       value_ = Handle<Object>(isolate()->factory()->NewNumber(scalar_value));
       return;
     }
 
     case kCapturedObject:
     case kDuplicatedObject:
     case kArgumentsObject:
     case kInvalid:
     case kTagged:
@@ skipping 1018 matching lines @@
       int32_t length = 0;
       CHECK(lengthObject->ToInt32(&length));
       Handle<FixedArrayBase> object =
           isolate_->factory()->NewFixedDoubleArray(length);
       slot->value_ = object;
       if (length > 0) {
         Handle<FixedDoubleArray> double_array =
             Handle<FixedDoubleArray>::cast(object);
         for (int i = 0; i < length; ++i) {
           Handle<Object> value = materializer.FieldAt(value_index);
-          CHECK(value->IsNumber());
-          if (value.is_identical_to(isolate_->factory()->hole_nan_value())) {
+          if (value.is_identical_to(isolate_->factory()->the_hole_value())) {
             double_array->set_the_hole(isolate_, i);
           } else {
+            CHECK(value->IsNumber());
             double_array->set(i, value->Number());
           }
         }
       }
       return object;
     }
     case STRING_TYPE:
     case ONE_BYTE_STRING_TYPE:
     case CONS_ONE_BYTE_STRING_TYPE:
     case SLICED_STRING_TYPE:
@@ skipping 317 matching lines @@
       CHECK(value_info->IsMaterializedObject());
 
       value_info->value_ =
           Handle<Object>(previously_materialized_objects->get(i), isolate_);
     }
   }
 }
 
 }  // namespace internal
 }  // namespace v8