Return MaybeHandle from Object::ToSmi.

src/ic.cc

 // Copyright 2012 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 "v8.h"
 
 #include "accessors.h"
 #include "api.h"
 #include "arguments.h"
 #include "codegen.h"
@@ skipping 1611 matching lines @@
     return JSArray::cast(*receiver)->length()->IsSmi() &&
         index >= Smi::cast(JSArray::cast(*receiver)->length())->value();
   }
   return index >= receiver->elements()->length();
 }
 
 
 KeyedAccessStoreMode KeyedStoreIC::GetStoreMode(Handle<JSObject> receiver,
                                                 Handle<Object> key,
                                                 Handle<Object> value) {
-  Handle<Object> smi_key = Object::ToSmi(isolate(), key);
-  ASSERT(!smi_key.is_null() && smi_key->IsSmi());
-  int index = Handle<Smi>::cast(smi_key)->value();
+  Handle<Smi> smi_key = Object::ToSmi(isolate(), key).ToHandleChecked();
+  int index = smi_key->value();
   bool oob_access = IsOutOfBoundsAccess(receiver, index);
   // Don't consider this a growing store if the store would send the receiver to
   // dictionary mode.
   bool allow_growth = receiver->IsJSArray() && oob_access &&
       !receiver->WouldConvertToSlowElements(key);
   if (allow_growth) {
     // Handle growing array in stub if necessary.
     if (receiver->HasFastSmiElements()) {
       if (value->IsHeapNumber()) {
         if (receiver->HasFastHoleyElements()) {
@@ skipping 1278 matching lines @@
 #undef ADDR
 };
 
 
 Address IC::AddressFromUtilityId(IC::UtilityId id) {
   return IC_utilities[id];
 }
 
 
 } }  // namespace v8::internal