Add SExpression test and share tests between dart2dart and 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 7acf50452f33de7eb9d6f68d41c8a190c30c1677..bed7ed591cedf5b909bd4d96903c15465eac08ad 100644
--- a/pkg/analyzer2dart/lib/src/cps_generator.dart
+++ b/pkg/analyzer2dart/lib/src/cps_generator.dart
@@ -69,6 +69,12 @@ class CpsGeneratingVisitor extends SemanticVisitor<ir.Node>
   }
 
   @override
+  ir.Node visitMethodInvocation(MethodInvocation node) {
+    // Overridden to avoid eager visits of the receiver and arguments.
+    return handleMethodInvocation(node);
+  }
+
+  @override
   ir.Primitive visitDynamicInvocation(MethodInvocation node,
                                       AccessSemantics semantics) {
     // TODO(johnniwinther): Handle implicit `this`.
@@ -137,6 +143,12 @@ class CpsGeneratingVisitor extends SemanticVisitor<ir.Node>
   }
 
   @override
+  ir.Node visitPropertyAccess(PropertyAccess node) {
+    // Overridden to avoid eager visits of the receiver.
+    return handlePropertyAccess(node);
+  }
+
+  @override
   ir.Node visitLocalVariableAccess(AstNode node, AccessSemantics semantics) {
     return handleLocalAccess(node, semantics);
   }