27 lines
826 B
JavaScript
27 lines
826 B
JavaScript
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// 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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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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