Use range information for optimizing integer boxing and fix bug in range analysis.

runtime/vm/dart_api_impl.cc

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "include/dart_api.h"
 #include "include/dart_mirrors_api.h"
 #include "include/dart_native_api.h"
 
 #include "platform/assert.h"
 #include "vm/bigint_operations.h"
@@ skipping 1956 matching lines @@
     *fits = BigintOperations::FitsIntoUint64(Bigint::Cast(int_obj));
   }
   return Api::Success();
 }
 
 
 DART_EXPORT Dart_Handle Dart_NewInteger(int64_t value) {
   // Fast path for Smis.
   Isolate* isolate = Isolate::Current();
   CHECK_ISOLATE(isolate);
-  if (Smi::IsValid64(value)) {
+  if (Smi::IsValid(value)) {
     NOHANDLESCOPE(isolate);
     return Api::NewHandle(isolate, Smi::New(static_cast<intptr_t>(value)));
   }
   // Slow path for Mints and Bigints.
   DARTSCOPE(isolate);
   CHECK_CALLBACK_STATE(isolate);
   return Api::NewHandle(isolate, Integer::New(value));
 }
 
 
@@ skipping 2704 matching lines @@
   TRACE_API_CALL(CURRENT_FUNC);
   NativeArguments* arguments = reinterpret_cast<NativeArguments*>(args);
   arguments->SetReturn(Bool::Get(retval));
 }
 
 
 DART_EXPORT void Dart_SetIntegerReturnValue(Dart_NativeArguments args,
                                             int64_t retval) {
   NativeArguments* arguments = reinterpret_cast<NativeArguments*>(args);
   ASSERT(arguments->isolate() == Isolate::Current());
-  if (Smi::IsValid64(retval)) {
+  if (Smi::IsValid(retval)) {
     Api::SetSmiReturnValue(arguments, retval);
   } else {
     // Slow path for Mints and Bigints.
     ASSERT_CALLBACK_STATE(arguments->isolate());
     Api::SetIntegerReturnValue(arguments, retval);
   }
 }
 
 
 DART_EXPORT void Dart_SetDoubleReturnValue(Dart_NativeArguments args,
@@ skipping 544 matching lines @@
 
 
 DART_EXPORT void Dart_RegisterRootServiceRequestCallback(
     const char* name,
     Dart_ServiceRequestCallback callback,
     void* user_data) {
   Service::RegisterRootEmbedderCallback(name, callback, user_data);
 }
 
 }  // namespace dart