Add a proper HInvokeConstructorBody instead of mis-using HInvokeDynamicMethod.

sdk/lib/_internal/compiler/implementation/world.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.
 
 part of dart2js;
 
 class World {
   final Compiler compiler;
   final FullFunctionSet allFunctions;
   final Set<Element> functionsCalledInLoop = new Set<Element>();
@@ skipping 188 matching lines @@
 
   void addFunctionCalledInLoop(Element element) {
     functionsCalledInLoop.add(element.declaration);
   }
 
   bool isCalledInLoop(Element element) {
     return functionsCalledInLoop.contains(element.declaration);
   }
 
   SideEffects getSideEffectsOfElement(Element element) {
+    // The type inferrer (where the side effects are being computed),
+    // does not see generative constructor bodies because they are
+    // created by the backend. Also, it does not make any distinction
+    // between a constructor and its body for side effects. This
+    // implies that currently, the side effects of a constructor body
+    // contain the side effects of the initializers.
+    assert(!element.isGenerativeConstructorBody());
     return sideEffects.putIfAbsent(element.declaration, () {
       return new SideEffects();
     });
   }
 
   void registerSideEffects(Element element, SideEffects effects) {
     sideEffects[element.declaration] = effects;
   }
 
   SideEffects getSideEffectsOfSelector(Selector selector) {
     // We're not tracking side effects of closures.
     if (selector.isClosureCall()) {
       return new SideEffects();
     }
     SideEffects sideEffects = new SideEffects.empty();
     for (Element e in allFunctions.filter(selector)) {
       if (e.isField()) {
         if (selector.isGetter()) {
           sideEffects.setDependsOnInstancePropertyStore();
         } else if (selector.isSetter()) {
           sideEffects.setChangesInstanceProperty();
         }
       }
       sideEffects.add(getSideEffectsOfElement(e));
     }
     return sideEffects;
   }
 }