[kernel] Add ability to (de)serialize DirectPropertyGet

Change-Id: Ie75b45601f898a8286c72e97e11e7c08b64c00e8
Reviewed-on: https://dart-review.googlesource.com/c/89526
Reviewed-by: Kevin Millikin <kmillikin@google.com>
Reviewed-by: Daniel Hillerström <hillerstrom@google.com>

pkg/kernel/lib/text/text_serializer.dart

@@ -100,6 +100,7 @@ class ExpressionTagger extends ExpressionVisitor<String>
   String visitVariableSet(VariableSet _) => "set-var";
   String visitStaticGet(StaticGet _) => "get-static";
   String visitStaticSet(StaticSet _) => "set-static";
+  String visitDirectPropertyGet(DirectPropertyGet _) => "get-direct-prop";
 }
 
 TextSerializer<InvalidExpression> invalidExpressionSerializer = new Wrapped(
@@ -571,6 +572,24 @@ StaticSet wrapStaticSet(Tuple2<CanonicalName, Expression> tuple) {
   return new StaticSet.byReference(tuple.first.getReference(), tuple.second);
 }
 
+TextSerializer<DirectPropertyGet> directPropertyGetSerializer = new Wrapped(
+    unwrapDirectPropertyGet,
+    wrapDirectPropertyGet,
+    new Tuple2Serializer(
+        expressionSerializer, const CanonicalNameSerializer()));
+
+Tuple2<Expression, CanonicalName> unwrapDirectPropertyGet(
+    DirectPropertyGet expression) {
+  return new Tuple2(
+      expression.receiver, expression.targetReference.canonicalName);
+}
+
+DirectPropertyGet wrapDirectPropertyGet(
+    Tuple2<Expression, CanonicalName> tuple) {
+  return new DirectPropertyGet.byReference(
+      tuple.first, tuple.second.getReference());
+}
+
 Case<Expression> expressionSerializer =
     new Case.uninitialized(const ExpressionTagger());
 
@@ -779,6 +798,7 @@ void initializeSerializers() {
     "set-var",
     "get-static",
     "set-static",
+    "get-direct-prop",
   ]);
   expressionSerializer.serializers.addAll([
     stringLiteralSerializer,
@@ -817,6 +837,7 @@ void initializeSerializers() {
     variableSetSerializer,
     staticGetSerializer,
     staticSetSerializer,
+    directPropertyGetSerializer,
   ]);
   dartTypeSerializer.tags.addAll([
     "invalid",

pkg/kernel/test/text_serializer_from_kernel_nodes_test.dart

@@ -132,6 +132,30 @@ void test() {
           serializationState: new SerializationState(null),
           deserializationState: new DeserializationState(null, component.root));
     }(),
+    () {
+      Field field = new Field(new Name("field"), type: const DynamicType());
+      Class klass = new Class(name: "A", fields: <Field>[field]);
+      Library library = new Library(
+          new Uri(scheme: "package", path: "foo/bar.dart"),
+          classes: <Class>[klass]);
+      Component component = new Component(libraries: <Library>[library]);
+      component.computeCanonicalNames();
+
+      VariableDeclaration x =
+          new VariableDeclaration("x", type: const DynamicType());
+      return new TestCase(
+          name: "/* suppose A {dynamic field;} A x; */ x.{A::field}",
+          node: new DirectPropertyGet.byReference(
+              new VariableGet(x), field.reference),
+          expectation: ""
+              "(get-direct-prop (get-var \"x^0\" _)"
+              " \"package:foo/bar.dart::A::@fields::field\")",
+          serializationState: new SerializationState(
+              new SerializationEnvironment(null)..add(x, "x^0")),
+          deserializationState: new DeserializationState(
+              new DeserializationEnvironment(null)..add("x^0", x),
+              component.root));
+    }(),
   ];
   for (TestCase testCase in tests) {
     String roundTripInput =