Use call counts to determine which static calls to inline.

runtime/vm/object.cc

 // Copyright (c) 2012, 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 "vm/object.h"
 
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "vm/assembler.h"
 #include "vm/cpu.h"
@@ skipping 8697 matching lines @@
 
 intptr_t ICData::GetCountAt(intptr_t index) const {
   const Array& data = Array::Handle(ic_data());
   const intptr_t data_pos = index * TestEntryLength() +
       CountIndexFor(num_args_tested());
   return Smi::Value(Smi::RawCast(data.At(data_pos)));
 }
 
 
 intptr_t ICData::AggregateCount() const {
+  if (IsNull()) return 0;
   const intptr_t len = NumberOfChecks();
   intptr_t count = 0;
   for (intptr_t i = 0; i < len; i++) {
     count += GetCountAt(i);
   }
   return count;
 }
 
 
 RawFunction* ICData::GetTargetForReceiverClassId(intptr_t class_id) const {
@@ skipping 4948 matching lines @@
                                     space);
   return reinterpret_cast<RawWeakProperty*>(raw);
 }
 
 
 const char* WeakProperty::ToCString() const {
   return "_WeakProperty";
 }
 
 }  // namespace dart