Extract interceptor calls from raw is-checks.

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

Index: sdk/lib/_internal/compiler/implementation/ssa/interceptor_simplifier.dart
diff --git a/sdk/lib/_internal/compiler/implementation/ssa/interceptor_simplifier.dart b/sdk/lib/_internal/compiler/implementation/ssa/interceptor_simplifier.dart
index 1ea358de105955dbfad8f026270eba1da86ffdee..f63ec0bae4ff83197205b2887dc33dd70c7662f6 100644
--- a/sdk/lib/_internal/compiler/implementation/ssa/interceptor_simplifier.dart
+++ b/sdk/lib/_internal/compiler/implementation/ssa/interceptor_simplifier.dart
@@ -191,6 +191,12 @@ class SsaSimplifyInterceptors extends HBaseVisitor
     } else {
       interceptedClasses = new Set<ClassElement>();
       for (var user in node.usedBy) {
+        if (user is HIs) {

[ngeoffray, 2013/08/26 09:10:23]

Add a comment.

[Johnni Winther, 2013/08/27 08:45:44]

Done.

+          // TODO(johnniwinther): Optimize for is-checks that actually need the
+          // interceptor.

[ngeoffray, 2013/08/26 09:10:23]

I think you should move this TODO in the builder: buildIsNode.

[Johnni Winther, 2013/08/27 08:45:44]

Done.

+          interceptedClasses.addAll(backend.interceptedClasses);
+          break;
+        }
         if (user is! HInvoke) continue;
         // We don't handle escaping interceptors yet.
         interceptedClasses.addAll(
@@ -248,7 +254,7 @@ class SsaSimplifyInterceptors extends HBaseVisitor
     return true;
   }
 
-  
+

[ngeoffray, 2013/08/26 09:10:23]

Get rid of extra line.

[Johnni Winther, 2013/08/27 08:45:44]

Done.

   bool visitOneShotInterceptor(HOneShotInterceptor node) {
     HInstruction constant = tryComputeConstantInterceptor(
         node.inputs[1], node.interceptedClasses);