Use simple loop tracking instead of size to determine if

lib/compiler/implementation/ssa/builder.dart

Index: lib/compiler/implementation/ssa/builder.dart
diff --git a/lib/compiler/implementation/ssa/builder.dart b/lib/compiler/implementation/ssa/builder.dart
index 3095a7fcb6cea21253ae3124ce548ce6673b6d38..461319c8e5bb68a694310d71278b471712cdf695 100644
--- a/lib/compiler/implementation/ssa/builder.dart
+++ b/lib/compiler/implementation/ssa/builder.dart
@@ -166,6 +166,7 @@ class SsaBuilderTask extends CompilerTask {
           break;
       }
       assert(graph.isValid());
+      graph.calledInLoop = element.calledInLoop;
       if (compiler.tracer.enabled) {
         String name;
         if (element.enclosingElement !== null &&