Build entire program with kernel for conversion to ssa.

pkg/compiler/lib/src/js_backend/kernel_task.dart

 // Copyright (c) 2016, 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.
 
 import '../compiler.dart';
 import '../kernel/kernel.dart';
 
 import 'backend.dart';
 
 /// Visits the compiler main function and builds the kernel representation.
 ///
 /// This creates a mapping from kernel nodes to AST nodes to be used later.
 class KernelTask {
   final Compiler _compiler;
   final Kernel kernel;
 
   KernelTask(JavaScriptBackend backend)
       : this._compiler = backend.compiler,
         this.kernel = new Kernel(backend.compiler);
 
   /// Builds the kernel IR for the main function.
   ///
   /// May enqueue more elements to the resolution queue.
   void buildKernelIr() {
-    kernel.functionToIr(_compiler.mainFunction);
-    kernel.processWorkQueue();
+    kernel.libraryDependencies(_compiler.options.entryPoint);
   }
 }