Implement type argument access and reification of runtime types.

pkg/compiler/lib/src/cps_ir/cps_ir_nodes_sexpr.dart

 // Copyright (c) 2014, 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 dart2js.ir_nodes_sexpr;
 
 import '../constants/values.dart';
 import '../util/util.dart';
 import 'cps_ir_nodes.dart';
 
@@ skipping 311 matching lines @@
 
   String visitIdentical(Identical node) {
     String left = access(node.left);
     String right = access(node.right);
     return '(Identical $left $right)';
   }
 
   String visitInterceptor(Interceptor node) {
     return '(Interceptor ${access(node.input)})';
   }
+
+  String visitReifyRuntimeType(ReifyRuntimeType node) {
+    return '(ReifyRuntimeType ${access(node.value)})';
+  }
+
+  String visitReadTypeVariable(ReadTypeVariable node) {
+    return '(ReadTypeVariable ${access(node.target)}.${node.variable})';
+  }
 }
 
 class ConstantStringifier extends ConstantValueVisitor<String, Null> {
   // Some of these methods are unimplemented because we haven't had a need
   // to print such constants.  When printing is implemented, the corresponding
   // parsing support should be added to SExpressionUnstringifier.parseConstant
   // in the dart2js tests (currently in the file
   // tests/compiler/dart2js/backend_dart/sexpr_unstringifier.dart).
 
   String _failWith(ConstantValue constant) {
@@ skipping 89 matching lines @@
   void setReturnContinuation(Continuation node) {
     assert(!_names.containsKey(node) || _names[node] == 'return');
     _names[node] = 'return';
   }
 
   String getName(Node node) {
     assert(_names.containsKey(node));
     return _names[node];
   }
 }