Implement is-checks for static functions.

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 bf500a8d468b44f1cd5143dbe50f3da6293e0e07..c6656510102dcf53c1c2d86bce88adffc431865f 100644
--- a/sdk/lib/_internal/compiler/implementation/ssa/codegen.dart
+++ b/sdk/lib/_internal/compiler/implementation/ssa/codegen.dart
@@ -2398,6 +2398,9 @@ abstract class SsaCodeGenerator implements HVisitor, HBlockInformationVisitor {
                || Elements.isListSupertype(element, compiler)) {
       handleListOrSupertypeCheck(input, type);
       attachLocationToLast(node);
+    } else if (element.isTypedef()) {

[ngeoffray, 2012/12/13 12:38:57]

Why did you need this? Code can just fall through. Also, with this change, "null
is Typedef" would fail. Is that not covered by tests?

[karlklose, 2012/12/13 13:08:46]

It falls down to the next case which emits and object check, but the value is
actually a function.

[ngeoffray, 2012/12/13 13:20:37]

I see. So don't you need to also check for null here?

[karlklose, 2012/12/13 14:10:48]

Indeed, done.

+      checkType(input, type);
+      attachLocationToLast(node);
     } else if (types[input].canBePrimitive() || types[input].canBeNull()) {
       checkObject(input, '===');
       js.Expression objectTest = pop();