Simple sharing and hoisting of final field loads

pkg/compiler/lib/src/js_backend/codegen/task.dart

Index: pkg/compiler/lib/src/js_backend/codegen/task.dart
diff --git a/pkg/compiler/lib/src/js_backend/codegen/task.dart b/pkg/compiler/lib/src/js_backend/codegen/task.dart
index 6ef2bd314a3171552f73110a7bbfff3fe9346e6a..2ee5880c6062629b724d11e534a9e8e0f3b2d14a 100644
--- a/pkg/compiler/lib/src/js_backend/codegen/task.dart
+++ b/pkg/compiler/lib/src/js_backend/codegen/task.dart
@@ -206,6 +206,7 @@ class CpsFunctionCompiler implements FunctionCompiler {
       applyCpsPass(new RedundantPhiEliminator(), cpsFunction);
       applyCpsPass(new InsertRefinements(typeSystem), cpsFunction);
       applyCpsPass(new TypePropagator(compiler, typeSystem, this), cpsFunction);
+      applyCpsPass(new ShareFinalFields(backend), cpsFunction);
       applyCpsPass(new RemoveRefinements(), cpsFunction);
       applyCpsPass(new ShrinkingReducer(), cpsFunction);
       applyCpsPass(new ScalarReplacer(compiler), cpsFunction);