Instruction selection before removing HTypeKnown

sdk/lib/_internal/compiler/implementation/ssa/tracer.dart

 // 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.
 
 library tracer;
 
 import 'dart:async' show EventSink;
 
 import 'ssa.dart';
 import '../js_backend/js_backend.dart';
@@ skipping 490 matching lines @@
 
     return "Try: $tryBlock, Catch: $catchBlock, Finally: $finallyBlock, "
         "Join: B${successors.last.id}";
   }
 
   String visitIs(HIs node) {
     String type = node.typeExpression.toString();
     return "TypeTest: ${temporaryId(node.expression)} is $type";
   }
 
+  String visitIsViaInterceptor(HIsViaInterceptor node) {
+    String type = node.typeExpression.toString();
+    return "TypeTest: ${temporaryId(node.inputs[0])} is $type";
+  }
+
   String visitTypeConversion(HTypeConversion node) {
     assert(node.inputs.length <= 2);
     String otherInput = (node.inputs.length == 2)
         ? temporaryId(node.inputs[1])
         : '';
     return "TypeConversion: ${temporaryId(node.checkedInput)} to "
       "${node.instructionType} $otherInput";
   }
 
   String visitTypeKnown(HTypeKnown node) {
@@ skipping 18 matching lines @@
   }
 
   String visitInterfaceType(HInterfaceType node) {
     return "InterfaceType: ${node.dartType}";
   }
 
   String visitDynamicType(HDynamicType node) {
     return "DynamicType";
   }
 }