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// 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.
// VMOptions=--optimization-counter-threshold=10 --no-background-compilation
// @dart = 2.9
import "package:expect/expect.dart";
// Test that constant propagation correctly updates phis when predecessor's
// reachability changes.
final keys = const ["keyA"];
final values = const ["a"];
main() {
for (var i = 0; i < 20; i++) test(keys[0]);
}
test(key) {
var ref = key2value(key);
Expect.equals("a", (ref == null) ? "-" : ref);
}
key2value(key) {
var index = indexOf(keys, key);
return (index == -1) ? null : values[index];
}
indexOf(keys, key) {
for (var i = keys.length - 1; i >= 0; i--) {
var equals = keys[i] == key;
if (equals) return i;
}
return -1;
}