Fix 2/2 for bug https://code.google.com/p/dart/issues/detail?id=11117: when inlining a generative c…

tests/language/inferrer_constructor2_test.dart

Index: tests/language/inferrer_constructor2_test.dart
===================================================================
--- tests/language/inferrer_constructor2_test.dart	(revision 0)
+++ tests/language/inferrer_constructor2_test.dart	(revision 0)
@@ -0,0 +1,62 @@
+// Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+// Regression test for dart2js that used to optimistically infer the
+// wrong types for fields because of generative constructors being
+// inlined.
+
+import "package:expect/expect.dart";
+import "compiler_annotations.dart";
+
+class A {
+  var foo;
+  var bar;
+
+  @DontInline
+  A() {
+    // Currently defeat inlining by using a closure.
+    bar = () => 42;
+    foo = 54;
+  }
+  A.inline();
+}
+
+main() {
+  // Make sure A's constructor is analyzed first by surrounding the
+  // body by two allocations.
+  new A();
+  bar();
+  new A();
+}
+
+class B {
+  var bar;
+  var closure;
+  @DontInline
+  B() {
+    // Currently defeat inlining by using a closure.
+    closure = () => 42;
+    bar = new A().foo;
+  }
+}
+
+@DontInline
+bar() {
+  // Make sure B's constructor is analyzed first by surrounding the
+  // body by two allocations.
+  new B();
+  // Currently defeat inlining by using a closure.
+  Expect.throws(() => new A.inline().foo + 42, (e) => e is NoSuchMethodError);
+  codegenLast();
+  new B();
+}
+
+@DontInline
+codegenLast() {
+  // This assignment currently defeats simple type inference, but not
+  // the optimistic inferrer.
+  new A().foo = new B().bar;
+  // Currently defeat inlining by using a closure.
+  new B().closure = () => 42;
+}