Support while loop in analyzer2dart.

pkg/analyzer2dart/lib/src/cps_generator.dart

Index: pkg/analyzer2dart/lib/src/cps_generator.dart
diff --git a/pkg/analyzer2dart/lib/src/cps_generator.dart b/pkg/analyzer2dart/lib/src/cps_generator.dart
index a8c7698a88efa3462f72e5910877e925e2173a0b..1b38157c9c446bb8237901cd215d96303046ceb2 100644
--- a/pkg/analyzer2dart/lib/src/cps_generator.dart
+++ b/pkg/analyzer2dart/lib/src/cps_generator.dart
@@ -317,4 +317,11 @@ class CpsGeneratingVisitor extends SemanticVisitor<ir.Node>
                        buildBody: subbuild(node.body),
                        buildUpdate: subbuildSequence(node.updaters));
   }
+
+  @override
+  visitWhileStatement(WhileStatement node) {
+    // TODO(johnniwinther): Support `while` as a jump target.
+    irBuilder.buildWhile(buildCondition: subbuild(node.condition),
+                         buildBody: subbuild(node.body));
+  }
 }