5c4267d52f
Bug: v8:9407 Change-Id: Id4ca4682d3fe4b2222a656c80dff95e5c099d5ed Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3822671 Reviewed-by: Nico Hartmann <nicohartmann@chromium.org> Commit-Queue: Qifan Pan <panq@google.com> Cr-Commit-Position: refs/heads/main@{#82524}
29 lines
945 B
JavaScript
29 lines
945 B
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 TestMultiplyAndTruncate(a, b) {
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return BigInt.asIntN(3, a * b);
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}
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function OptimizeAndTest(fn) {
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let bi = 2n ** (2n ** 29n);
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// Before optimization, a BigIntTooBig exception is expected
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assertThrows(() => fn(bi + 3n, bi + 4n), RangeError);
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if (%Is64Bit()) {
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%PrepareFunctionForOptimization(fn);
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assertEquals(-4n, fn(3n, 4n));
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assertEquals(-2n, fn(5n, 6n));
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%OptimizeFunctionOnNextCall(fn);
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// After optimization, operands are truncated to Word64
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// before being multiplied. No exceptions should be thrown
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// and the correct result is expected.
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assertEquals(-4n, fn(bi + 3n, bi + 4n));
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assertOptimized(fn);
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}
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}
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OptimizeAndTest(TestMultiplyAndTruncate);
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