Towards compiling Hello World!

pkg/compiler/lib/src/compiler.dart

Index: pkg/compiler/lib/src/compiler.dart
diff --git a/pkg/compiler/lib/src/compiler.dart b/pkg/compiler/lib/src/compiler.dart
index 27bab26f7a08ee07145463f696c3e10bc36ae3e4..131462d4c35400214989ac881ad92e28f01a915c 100644
--- a/pkg/compiler/lib/src/compiler.dart
+++ b/pkg/compiler/lib/src/compiler.dart
@@ -613,10 +613,7 @@ abstract class Compiler {
         reporter.log('Compiling...');
         phase = PHASE_COMPILING;
 
-        Enqueuer codegenEnqueuer = enqueuer.createCodegenEnqueuer(closedWorld);
-        _codegenWorldBuilder = codegenEnqueuer.worldBuilder;
-        codegenEnqueuer.applyImpact(
-            backend.onCodegenStart(closedWorld, _codegenWorldBuilder));
+        Enqueuer codegenEnqueuer = startCodegen(closedWorld);
         if (compileAll) {
           libraryLoader.libraries.forEach((LibraryEntity library) {
             codegenEnqueuer.applyImpact(computeImpactForLibrary(library));
@@ -639,6 +636,14 @@ abstract class Compiler {
         checkQueues(resolutionEnqueuer, codegenEnqueuer);
       });
 
+  Enqueuer startCodegen(ClosedWorld closedWorld) {
+    Enqueuer codegenEnqueuer = enqueuer.createCodegenEnqueuer(closedWorld);
+    _codegenWorldBuilder = codegenEnqueuer.worldBuilder;
+    codegenEnqueuer
+        .applyImpact(backend.onCodegenStart(closedWorld, _codegenWorldBuilder));
+    return codegenEnqueuer;
+  }
+
   /// Perform the steps needed to fully end the resolution phase.
   ClosedWorldRefiner closeResolution(FunctionEntity mainFunction) {
     phase = PHASE_DONE_RESOLVING;