Fix bug in SsaConstructionFieldTypes where the phase got confused seeing multiple HForeignNew due t…

tests/language/field_inference_test.dart

+// 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 and its SsaConstructionFieldTypes
+// phase.
+
+import "package:expect/expect.dart";
+
+class A {
+  var _field;
+  final other;
+  get field => _field;
+  A(this._field) : other = null;
+  A.fromOther(this.other) {
+    _field = other.field;
+  }
+}
+
+class B {
+  var a;
+  B() {
+    try { // Defeat inlining.
+      // An inlined generative constructor call used to confuse
+      // dart2js.
+      a = new A(42);
+    } catch (e) {
+      rethrow;
+    }
+  }
+}
+
+var array = [new A(42), new B()];
+
+main() {
+  // Surround the call to [analyzeAfterB] by two [: new B() :] calls
+  // to ensure the [B] constructor will be analyzed first.
+  new B();
+  var a = analyzeAfterB();
+  new B();
+  Expect.equals(42, a._field);
+}
+
+analyzeAfterB() {
+  try { // Defeat inlining.
+    return new A.fromOther(array[0]);
+  } catch (e) {
+    rethrow;
+  }
+}