Implement super.foo = expression.

dart/lib/compiler/implementation/ssa/nodes.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.
 
 interface HVisitor<R> {
   R visitAdd(HAdd node);
   R visitBailoutTarget(HBailoutTarget node);
   R visitBitAnd(HBitAnd node);
   R visitBitNot(HBitNot node);
   R visitBitOr(HBitOr node);
@@ skipping 1231 matching lines @@
     if (input == target) return HType.UNKNOWN;
     return computeDesiredTypeForNonTargetInput(input);
   }
 
   HType computeDesiredTypeForNonTargetInput(HInstruction input) {
     return HType.UNKNOWN;
   }
 }
 
 class HInvokeSuper extends HInvokeStatic {
-  HInvokeSuper(inputs) : super(inputs);
+  final bool isSetter;
+  HInvokeSuper(inputs, [this.isSetter = false]) : super(inputs);
   toString() => 'invoke super: ${element.name}';
   accept(HVisitor visitor) => visitor.visitInvokeSuper(this);
+
+  HInstruction get value() {
+    assert(isSetter);
+    // Index 0: the element, index 1: 'this'.
+    return inputs[2];
+  }
 }
 
 class HInvokeInterceptor extends HInvokeStatic {
   final Selector selector;
   final SourceString name;
   final bool getter;
   final bool setter;
 
   HInvokeInterceptor(this.selector,
                      this.name,
@@ skipping 1453 matching lines @@
   HBasicBlock get start() => expression.start;
   HBasicBlock get end() {
     // We don't create a switch block if there are no cases.
     assert(!statements.isEmpty());
     return statements.last().end;
   }
 
   bool accept(HStatementInformationVisitor visitor) =>
       visitor.visitSwitchInfo(this);
 }