dart-sdk/tests/language/propagate/phi_test.dart
Robert Nystrom 5fff7d61e1 Migrate language_2/propagate to NNBD.
Change-Id: I43ab07aebe7918a1265f8dc594b759e85c08e862
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/150264
Auto-Submit: Bob Nystrom <rnystrom@google.com>
Commit-Queue: Erik Ernst <eernst@google.com>
Reviewed-by: Erik Ernst <eernst@google.com>
2020-06-08 23:36:46 +00:00

24 lines
619 B
Dart

// Copyright (c) 2012, 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.
// Check that phi type computation in the Dart2Js compiler does the
// correct thing.
import "package:expect/expect.dart";
bar() => 490;
bar2() => 0;
foo(b) {
var x = bar();
var x2 = x;
if (b) x2 = bar2();
var x3 = 9 + x; // Guarantees that x is a number. Dart2js propagated the
// type information back to the phi (for x2).
return x2 + x3;
}
main() {
Expect.equals(499, foo(true));
}