Start creating a MemberSet abstraction, and use it to fold getters/setters into field accesses.

lib/compiler/implementation/ssa/builder.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.
 
 class Interceptors {
   Compiler compiler;
   Interceptors(Compiler this.compiler);
 
   SourceString mapOperatorToMethodName(Operator op) {
     String name = op.source.stringValue;
@@ skipping 376 matching lines @@
                                        element: element);
       }
       return directLocals[element];
     } else if (isStoredInClosureField(element)) {
       Element redirect = redirectionMapping[element];
       // We must not use the [LocalsHandler.readThis()] since that could
       // point to a captured this which would be stored in a closure-field
       // itself.
       HInstruction receiver = new HThis();
       builder.add(receiver);
-      HInstruction fieldGet = new HFieldGet(redirect, receiver);
+      HInstruction fieldGet = new HFieldGet(redirect.name, receiver);
       builder.add(fieldGet);
       return fieldGet;
     } else if (isBoxed(element)) {
       Element redirect = redirectionMapping[element];
       // In the function that declares the captured variable the box is
       // accessed as direct local. Inside the nested closure the box is
       // accessed through a closure-field.
       // Calling [readLocal] makes sure we generate the correct code to get
       // the box.
       assert(redirect.enclosingElement.kind == ElementKind.VARIABLE);
       HInstruction box = readLocal(redirect.enclosingElement);
-      HInstruction lookup = new HFieldGet(redirect, box);
+      HInstruction lookup = new HFieldGet(redirect.name, box);
       builder.add(lookup);
       return lookup;
     } else {
       assert(isUsedInTry(element));
-      HInstruction variable = new HFieldGet.fromActivation(element);
+      HInstruction variable = new HFieldGet.fromActivation(element.name);
       builder.add(variable);
       return variable;
     }
   }
 
   HType cachedTypeOfThis;
 
   HInstruction readThis() {
     HInstruction res = readLocal(closureData.thisElement);
     if (res.guaranteedType === null) {
@@ skipping 16 matching lines @@
   void updateLocal(Element element, HInstruction value) {
     if (isAccessedDirectly(element)) {
       directLocals[element] = value;
     } else if (isStoredInClosureField(element)) {
       Element redirect = redirectionMapping[element];
       // We must not use the [LocalsHandler.readThis()] since that could
       // point to a captured this which would be stored in a closure-field
       // itself.
       HInstruction receiver = new HThis();
       builder.add(receiver);
-      builder.add(new HFieldSet(redirect, receiver, value));
+      builder.add(new HFieldSet(redirect.name, receiver, value));
     } else if (isBoxed(element)) {
       Element redirect = redirectionMapping[element];
       // The box itself could be captured, or be local. A local variable that
       // is captured will be boxed, but the box itself will be a local.
       // Inside the closure the box is stored in a closure-field and cannot
       // be accessed directly.
       assert(redirect.enclosingElement.kind == ElementKind.VARIABLE);
       HInstruction box = readLocal(redirect.enclosingElement);
-      builder.add(new HFieldSet(redirect, box, value));
+      builder.add(new HFieldSet(redirect.name, box, value));
     } else {
       assert(isUsedInTry(element));
-      builder.add(new HFieldSet.fromActivation(element,value));
+      builder.add(new HFieldSet.fromActivation(element.name, value));
     }
   }
 
   /**
    * This function must be called before visiting any children of the loop. In
    * particular it needs to be called before executing the initializers.
    *
    * The [LocalsHandler] will make the boxes and updates at the right moment.
    * The builder just needs to call [enterLoopBody] and [enterLoopUpdates] (for
    * [For] loops) at the correct places. For phi-handling [beginLoopHeader] and
@@ skipping 2837 matching lines @@
                                    <HInstruction>[target, input],
                                    HType.STRING));
     return builder.pop();
   }
 
   HInstruction result() {
     flushLiterals();
     return prefix;
   }
 }