Register JSFixedArray as instantiated.

pkg/compiler/lib/src/ssa/builder.dart

 // 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.
 
 import 'dart:collection';
 
 import 'package:js_runtime/shared/embedded_names.dart';
 
 import '../closure.dart';
 import '../common.dart';
@@ skipping 3446 matching lines @@
         HTypeConversion conversion = new HTypeConversion(
             null,
             HTypeConversion.ARGUMENT_TYPE_CHECK,
             commonMasks.numType,
             inputs[0]);
         add(conversion);
         inputs[0] = conversion;
       }
       js.Template code = js.js.parseForeignJS('new Array(#)');
       var behavior = new native.NativeBehavior();
+      behavior.typesInstantiated.add(expectedType);
       behavior.typesReturned.add(expectedType);
       // The allocation can throw only if the given length is a double or
       // outside the unsigned 32 bit range.
       // TODO(sra): Array allocation should be an instruction so that canThrow
       // can depend on a length type discovered in optimization.
       bool canThrow = true;
       if (inputs[0].isInteger(closedWorld) && inputs[0] is HConstant) {
         var constant = inputs[0];
         int value = constant.constant.primitiveValue;
         if (0 <= value && value < 0x100000000) canThrow = false;
@@ skipping 3292 matching lines @@
       this.oldReturnLocal,
       this.oldReturnType,
       this.oldResolvedAst,
       this.oldStack,
       this.oldLocalsHandler,
       this.inTryStatement,
       this.allFunctionsCalledOnce,
       this.oldElementInferenceResults)
       : super(function);
 }