dart-sdk/tests/language_2/propagate/phi_test.dart
Robert Nystrom fc1b1ecc71 Move files under language_2 into subdirectories.
Change-Id: Idbcc965a27e9ffeedf5e0a1068b019de4193070f
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/127745
Commit-Queue: Bob Nystrom <rnystrom@google.com>
Reviewed-by: Alexander Thomas <athom@google.com>
2019-12-11 19:18:00 +00:00

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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));
}