Defer addStubs to class instantiation time.

pkg/compiler/lib/src/ssa/codegen_helpers.dart

Index: pkg/compiler/lib/src/ssa/codegen_helpers.dart
diff --git a/pkg/compiler/lib/src/ssa/codegen_helpers.dart b/pkg/compiler/lib/src/ssa/codegen_helpers.dart
index c298e06bc32dbce718a3418bbf9c026f97daf853..8b373bb7096d4bfb767aebd72b984a7736f65d67 100644
--- a/pkg/compiler/lib/src/ssa/codegen_helpers.dart
+++ b/pkg/compiler/lib/src/ssa/codegen_helpers.dart
@@ -335,6 +335,8 @@ class SsaInstructionMerger extends HBaseVisitor {
 
   SsaInstructionMerger(this.generateAtUseSite, this.compiler);
 
+  JavaScriptBackend get backend => compiler.backend;
+
   void visitGraph(HGraph graph) {
     visitDominatorTree(graph);
   }
@@ -384,6 +386,24 @@ class SsaInstructionMerger extends HBaseVisitor {
     analyzeInputs(instruction, 0);
   }
 
+  void visitInvokeSuper(HInvokeSuper instruction) {
+    Element superMethod = instruction.element;
+    Selector selector = instruction.selector;
+    // If aliased super members cannot be used, we will generate code like
+    //
+    // C.prototype.method.call(instance)

[floitsch, 2015/03/06 14:54:10]

indent by 4.

[herhut, 2015/03/09 14:28:35]

Done.

+    //
+    // where instance is the [this] object for the method. In such a case, the
+    // get of prototype might be evaluted before instance is created if we

[floitsch, 2015/03/06 14:54:09]

evaluated

[herhut, 2015/03/09 14:28:35]

Thanks!

+    // generate instance at use site, which in turn might update the prototype
+    // after first access if we use lazy initialization.

[sra1, 2015/03/05 18:23:25]

This requires inlining of method, right?

new A().m() where m() => super.m()

[herhut, 2015/03/06 12:36:45]

Yes. We have an existing test that does this.

+    if (!backend.canUseAliasedSuperMember(superMethod, selector)) {
+      analyzeInputs(instruction, 1);
+    } else {
+      super.visitInvokeSuper(instruction);
+    }
+  }
+
   void visitIs(HIs instruction) {
     // In the general case the input might be used multple multiple times, so it
     // must not be set generate at use site.  If the code will generate