Less inequivalence on Hello World!

tests/compiler/dart2js/kernel/compile_from_dill_test.dart

Index: tests/compiler/dart2js/kernel/compile_from_dill_test.dart
diff --git a/tests/compiler/dart2js/kernel/compile_from_dill_test.dart b/tests/compiler/dart2js/kernel/compile_from_dill_test.dart
index e2defb673c1f02eaa1eed93ddd566514ca508202..701193943d447ba3b0c5d0dd0ba6c356cdc4e2ef 100644
--- a/tests/compiler/dart2js/kernel/compile_from_dill_test.dart
+++ b/tests/compiler/dart2js/kernel/compile_from_dill_test.dart
@@ -175,6 +175,13 @@ Future<ResultKind> mainInternal(List<String> args,
       elementFilter: elementFilter,
       verbose: arguments.verbose);
 
+  checkEmitters(compiler1.backend.emitter, compiler2.backend.emitter,
+      elementEquivalence: (a, b) => equivalence.entityEquivalence(a, b),
+      typeEquivalence: (DartType a, DartType b) {
+        return equivalence.typeEquivalence(unalias(a), b);
+      },
+      verbose: arguments.verbose);
+
   print('--- checking output------- -----------------------------------------');
   collector1.outputMap
       .forEach((OutputType outputType, Map<String, BufferedOutputSink> map1) {