Encode super calls via extra properties on prototypes.

sdk/lib/_internal/compiler/implementation/ssa/codegen.dart

Index: sdk/lib/_internal/compiler/implementation/ssa/codegen.dart
diff --git a/sdk/lib/_internal/compiler/implementation/ssa/codegen.dart b/sdk/lib/_internal/compiler/implementation/ssa/codegen.dart
index f67fe0030254043ea8bd3846ff4f2304649a6cf7..c3e5ad545890a4fb802fb86fb14887323886b278 100644
--- a/sdk/lib/_internal/compiler/implementation/ssa/codegen.dart
+++ b/sdk/lib/_internal/compiler/implementation/ssa/codegen.dart
@@ -1682,14 +1682,23 @@ class SsaCodeGenerator implements HVisitor, HBlockInformationVisitor {
         registry.registerDynamicGetter(selector);
         registry.registerGetterForSuperMethod(node.element);
         methodName = backend.namer.invocationName(selector);
+        push(

[sra1, 2014/11/03 18:30:56]

What would it take to use an alias for getters too?

[herhut, 2014/11/04 12:52:49]

Getters are more complicated, as they can be real getters with corresponding
code or generated at runtime. I would have to extend the already complex
encoding for fields with auto generated getters. Given that super getters are
rare (in the usecase I am looking at it is 30 getter calls vs 1450 method
invocations) I have decided to leave them as is.

+                  js.js('#.prototype.#.call(#)', [

[floitsch, 2014/11/03 09:46:22]

indentation.

[herhut, 2014/11/04 12:52:49]

Done.

+                      backend.namer.elementAccess(superClass),
+                      methodName, visitArguments(node.inputs, start: 0)]),
+                  node);
       } else {
-        methodName = backend.namer.getNameOfInstanceMember(superMethod);
-      }
-      push(
-          js.js('#.prototype.#.call(#)', [
-              backend.namer.elementAccess(superClass),
-              methodName, visitArguments(node.inputs, start: 0)]),
+        methodName =
+            backend.namer.getNameOfAliasedSuperMember(superMethod);
+        backend.registerAliasedSuperMember(superMethod, node.caller);
+        use(node.inputs.first);
+        push(
+          js.js('#.#(#)', [
+            pop(), methodName,
+            visitArguments(node.inputs, start: 1)]),
           node);
+      }
+
     }
   }