Implement super calls.

frog/leg/ssa/tracer.dart

 // Copyright (c) 2011, 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.
 
 class HTracer extends HGraphVisitor {
   int indent = 0;
   final StringBuffer output;
 
   factory HTracer.singleton() {
     if (_singleton === null) _singleton = new HTracer._internal();
@@ skipping 251 matching lines @@
       => visitInvokeStatic(invoke);
 
   String visitInvokeStatic(HInvokeStatic invoke) {
     String target = temporaryId(invoke.target);
     int offset = HInvoke.ARGUMENTS_OFFSET;
     List arguments =
         invoke.inputs.getRange(offset, invoke.inputs.length - offset);
     return visitGenericInvoke("Invoke", target, arguments);
   }
 
+  String visitInvokeSuper(HInvokeSuper invoke) {
+    String target = temporaryId(invoke.target);
+    int offset = HInvoke.ARGUMENTS_OFFSET + 1;
+    List arguments =
+        invoke.inputs.getRange(offset, invoke.inputs.length - offset);
+    return visitGenericInvoke("Invoke super", target, arguments);
+  }
+
   String visitForeign(HForeign foreign) {
     return visitGenericInvoke("Foreign", "${foreign.code}", foreign.inputs);
   }
 
   String visitForeignNew(HForeignNew node) {
     return visitGenericInvoke("New", "${node.element.name}", node.inputs);
   }
 
   String visitLess(HLess node) => visitInvokeStatic(node);
   String visitLessEqual(HLessEqual node) => visitInvokeStatic(node);
@@ skipping 80 matching lines @@
       case HType.INTEGER: type = "integer"; break;
       case HType.DOUBLE: type = "double"; break;
       case HType.NUMBER: type = "number"; break;
       case HType.STRING: type = "string"; break;
       case HType.STRING_OR_ARRAY: type = "string_or_array"; break;
       default: unreachable();
     }
     return "TypeGuard: ${temporaryId(node.inputs[0])} is $type";
   }
 }