Aart Bik
914065d80b
Rationale: Rather than relying on a separate loop detector, rely on the new loop framework, which avoids code duplication and ensures any improvement in loop detection/handling will benefit this phase too. Note, most of the time, the same loops are discovered with a few exceptions (which is okay, since this is "just" heuristic usage). This CL also simplifies loop detection a bit. https://github.com/dart-lang/sdk/issues/34473 Change-Id: I1a1b19b99a698c74822473d2a1fe370287c1ade4 Reviewed-on: https://dart-review.googlesource.com/c/80523 Commit-Queue: Aart Bik <ajcbik@google.com> Reviewed-by: Vyacheslav Egorov <vegorov@google.com> Reviewed-by: Alexander Markov <alexmarkov@google.com>
33 lines
849 B
Dart
33 lines
849 B
Dart
// Copyright (c) 2018, 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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// VMOptions=--no_background_compilation --optimization_counter_threshold=10
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import "package:expect/expect.dart";
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// This method forms an infinite, irreducible loop. As long as we
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// don't enter any of the branches, the method terminates. The test
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// is included to ensure an irreducible loop does not break anything
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// in the compiler.
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int bar(int x) {
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switch (x) {
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case_1:
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case 1:
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continue case_2;
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case_2:
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case 2:
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continue case_1;
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}
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return x;
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}
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main() {
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for (var i = -50; i <= 0; i++) {
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Expect.equals(i, bar(i));
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}
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for (var i = 3; i <= 50; i++) {
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Expect.equals(i, bar(i));
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}
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}
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