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https://github.com/dart-lang/sdk
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d4154ac6dc
Change-Id: Iad2963c7f9c184b089dc6d15aa4442f58d194bc2 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/151983 Reviewed-by: Nicholas Shahan <nshahan@google.com> Commit-Queue: Bob Nystrom <rnystrom@google.com> Auto-Submit: Bob Nystrom <rnystrom@google.com>
67 lines
1.6 KiB
Dart
67 lines
1.6 KiB
Dart
// Copyright (c) 2013, 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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// Test that branch fusion correctly sets branch environment for comparisons
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// that require unboxing and does not fuse branches that can deoptimize.
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// VMOptions=--optimization-counter-threshold=10 --no-use-osr --no-background-compilation
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import "package:expect/expect.dart";
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var sideEffect = true;
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barDouble(a, b) {
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sideEffect = false;
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final result = (a == b);
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sideEffect = !sideEffect;
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return result;
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}
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fooDouble(a, b) => barDouble(a, b) ? 1 : 0;
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barMint(a, b) {
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sideEffect = false;
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final result = (a == b);
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sideEffect = !sideEffect;
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return result;
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}
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fooMint(a, b) => barMint(a, b) ? 1 : 0;
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class A {
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operator ==(other) => identical(this, other);
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}
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class B extends A {}
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class C extends A {}
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barPoly(a, b) {
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sideEffect = false;
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final result = a == b;
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sideEffect = !sideEffect;
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return result;
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}
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fooPoly(a, b) => barPoly(a, b) ? 1 : 0;
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main() {
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final a = 1.0;
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final b = 0x4000000000000000; // 1 << 62
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final x = new A(), y = new B(), z = new C();
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for (var i = 0; i < 20; i++) {
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Expect.equals(1, fooDouble(a, a));
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Expect.isTrue(sideEffect);
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Expect.equals(0, fooMint(b, 0));
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Expect.isTrue(sideEffect);
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Expect.equals(1, fooPoly(x, x));
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Expect.equals(0, fooPoly(y, x));
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}
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Expect.equals(1, fooDouble(z, z));
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Expect.isTrue(sideEffect);
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Expect.equals(1, fooMint(z, z));
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Expect.isTrue(sideEffect);
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Expect.equals(1, fooPoly(z, z));
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Expect.isTrue(sideEffect);
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}
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