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16e03e7968
PR-URL: https://github.com/nodejs/node/pull/45579 Reviewed-By: Michaël Zasso <targos@protonmail.com> Reviewed-By: James M Snell <jasnell@gmail.com>
38 lines
1.2 KiB
JavaScript
38 lines
1.2 KiB
JavaScript
// Copyright 2022 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Flags: --allow-natives-syntax --turbofan --no-always-turbofan
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(function OptimizeAndTestOverflow() {
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function f(x, y) {
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return x - y;
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}
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%PrepareFunctionForOptimization(f);
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assertEquals(-1n, f(0n, 1n));
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assertEquals(-7n, f(2n, 9n));
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%OptimizeFunctionOnNextCall(f);
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assertEquals(9n, f(14n, 5n));
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assertOptimized(f);
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assertEquals(-(2n ** 63n), f(-(2n ** 62n), 2n ** 62n));
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assertOptimized(f);
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// Re-prepare the function before the first deopt to ensure type feedback is
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// not cleared by an untimely gc.
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%PrepareFunctionForOptimization(f);
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assertOptimized(f);
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// CheckedInt64Sub will trigger deopt due to overflow.
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assertEquals(-(2n ** 63n) - 1n, f(-(2n ** 62n + 1n), 2n ** 62n));
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if (%Is64Bit()) {
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assertUnoptimized(f);
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assertEquals(-1n, f(0n, 1n));
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assertEquals(-7n, f(2n, 9n));
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%OptimizeFunctionOnNextCall(f);
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assertEquals(9n, f(14n, 5n));
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assertOptimized(f);
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// Ensure there is no deopt loop.
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assertEquals(-(2n ** 63n) - 1n, f(-(2n ** 62n + 1n), 2n ** 62n));
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assertOptimized(f);
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}
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})();
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