Fix bug in optimization in the presence of externalized strings.

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/bigint_operations.h"
@@ skipping 8106 matching lines @@
         (cid != kMintCid) &&
         (cid != kBigintCid) &&
         (cid != kDoubleCid)) {
       return false;
     }
   }
   return true;
 }
 
 
+bool ICData::HasReceiverClassId(intptr_t class_id) const {
+  ASSERT(num_args_tested() > 0);
+  const intptr_t len = NumberOfChecks();
+  for (intptr_t i = 0; i < len; i++) {
+    const intptr_t test_class_id = GetReceiverClassIdAt(i);
+    if (test_class_id == class_id) {
+      return true;
+    }
+  }
+  return false;
+}
+
+
 // Returns true if all targets are the same.
 // TODO(srdjan): if targets are native use their C_function to compare.
 bool ICData::HasOneTarget() const {
   ASSERT(NumberOfChecks() > 0);
   const Function& first_target = Function::Handle(GetTargetAt(0));
   const intptr_t len = NumberOfChecks();
   for (intptr_t i = 1; i < len; i++) {
     if (GetTargetAt(i) != first_target.raw()) {
       return false;
     }
@@ skipping 4539 matching lines @@
   }
   return result.raw();
 }
 
 
 const char* WeakProperty::ToCString() const {
   return "_WeakProperty";
 }
 
 }  // namespace dart