dart2js cps: Global value numbering and loop-invariant code motion.

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 d9881b2782b7d242d12a8103b368f5949a933682..870bba8b3c5157dba1aeb3cd7583c7f459743e2a 100644
--- a/pkg/compiler/lib/src/js_backend/codegen/task.dart
+++ b/pkg/compiler/lib/src/js_backend/codegen/task.dart
@@ -207,7 +207,10 @@ 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 RedundantJoinEliminator(), cpsFunction);
+      applyCpsPass(new ShrinkingReducer(), cpsFunction);
+      applyCpsPass(new RedundantRefinementEliminator(typeSystem), cpsFunction);
+      applyCpsPass(new GVN(compiler), cpsFunction);
       applyCpsPass(new RemoveRefinements(), cpsFunction);
       applyCpsPass(new ShrinkingReducer(), cpsFunction);
       applyCpsPass(new ScalarReplacer(compiler), cpsFunction);
@@ -216,7 +219,7 @@ class CpsFunctionCompiler implements FunctionCompiler {
       applyCpsPass(new RedundantPhiEliminator(), cpsFunction);
       applyCpsPass(new BoundsChecker(typeSystem, compiler.world), cpsFunction);
       applyCpsPass(new ShrinkingReducer(), cpsFunction);
-      applyCpsPass(new ShareInterceptors(backend), cpsFunction);
+      applyCpsPass(new OptimizeInterceptors(backend), cpsFunction);
       applyCpsPass(new ShrinkingReducer(), cpsFunction);
     });
     return cpsFunction;