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b101a7d002
Change-Id: Ib33169c3e0ffc870915c189404074a1dea472546 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/196548 Reviewed-by: Bob Nystrom <rnystrom@google.com> Commit-Queue: Leaf Petersen <leafp@google.com>
28 lines
837 B
Dart
28 lines
837 B
Dart
// Copyright (c) 2017, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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//
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// Test that type tests are not misoptimized.
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// VMOptions=--optimization-counter-threshold=1000 --optimization-filter=IsAnInt
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// @dart = 2.9
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main() {
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train();
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if (IsAnInt("This is not an int")) throw "oops";
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}
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// Prime the IC with things that are and are not ints.
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void train() {
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for (int i = 0; i < 10000; i++) {
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IsAnInt(42); // Smi - always goes first in the generated code.
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IsAnInt(1 << 62); // Mint on 64 bit platforms.
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IsAnInt(1 << 62);
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// This one that is not an int goes last in the IC because it is called
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// less frequently.
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IsAnInt(4.2);
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}
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}
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bool IsAnInt(f) => f is int;
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