Use simple loop tracking instead of size to determine if

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 148 matching lines @@
           graph = compileConstructor(builder, work);
           break;
         case ElementKind.GENERATIVE_CONSTRUCTOR_BODY:
         case ElementKind.FUNCTION:
         case ElementKind.GETTER:
         case ElementKind.SETTER:
           graph = builder.buildMethod(work.element);
           break;
       }
       assert(graph.isValid());
+      graph.calledInLoop = element.calledInLoop;
       if (compiler.tracer.enabled) {
         String name;
         if (element.enclosingElement !== null &&
             element.enclosingElement.kind == ElementKind.CLASS) {
           String className = element.enclosingElement.name.slowToString();
           String memberName = element.name.slowToString();
           name = "$className.$memberName";
           if (element.kind == ElementKind.GENERATIVE_CONSTRUCTOR_BODY) {
             name = "$name (body)";
           }
@@ skipping 3263 matching lines @@
   void visitNodeList(NodeList node) {
      node.visitChildren(this);
   }
 
   HInstruction concat(HInstruction left, HInstruction right) {
     HInstruction instruction = new HStringConcat(left, right, node);
     builder.add(instruction);
     return instruction;
   }
 }