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c7b3292251
PR-URL: https://github.com/nodejs/node/pull/36139 Reviewed-By: Jiawen Geng <technicalcute@gmail.com> Reviewed-By: Colin Ihrig <cjihrig@gmail.com> Reviewed-By: Myles Borins <myles.borins@gmail.com> Reviewed-By: Shelley Vohr <codebytere@gmail.com>
25 lines
662 B
JavaScript
25 lines
662 B
JavaScript
// Copyright 2020 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
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function foo(a) {
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var y = 0x7fffffff; // 2^31 - 1
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// Widen the static type of y (this condition never holds).
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if (a == NaN) y = NaN;
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// The next condition holds only in the warmup run. It leads to Smi
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// (SignedSmall) feedback being collected for the addition below.
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if (a) y = -1;
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const z = (y + 1)|0;
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return z < 0;
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}
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%PrepareFunctionForOptimization(foo);
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assertFalse(foo(true));
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%OptimizeFunctionOnNextCall(foo);
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assertTrue(foo(false));
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