918fe04351
PR-URL: https://github.com/nodejs/node/pull/58070 Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com> Reviewed-By: Darshan Sen <raisinten@gmail.com> Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com> Reviewed-By: Rafael Gonzaga <rafael.nunu@hotmail.com>
58 lines
1.4 KiB
JavaScript
58 lines
1.4 KiB
JavaScript
// Copyright 2025 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 --maglev
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(function() {
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function foo(a) {
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v = a % a;
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return 1 / v;
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}
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%PrepareFunctionForOptimization(foo);
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// Ensures global {v} has constant cell -0.
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foo(-1);
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foo(-1);
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// Ensures we deopt when comparing 0 to -0.
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%OptimizeFunctionOnNextCall(foo);
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assertEquals(Infinity, foo(1));
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assertFalse(isOptimized(foo));
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})();
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(function() {
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function foo(a) {
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w = a % a;
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return 1 / w;
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}
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%PrepareFunctionForOptimization(foo);
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// Ensures global {w} has constant cell 0.
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foo(1);
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foo(1);
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// Ensures we deopt when comparing 0 to -0.
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%OptimizeFunctionOnNextCall(foo);
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assertEquals(-Infinity, foo(-1));
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assertFalse(isOptimized(foo));
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})();
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(function() {
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let ab = new ArrayBuffer(16);
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let int32view = new Int32Array(ab);
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int32view[1] = 0x7FFF_FFFF;
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int32view[0] = 0x0000_0000;
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int32view[3] = 0x7FFF_FFFF;
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int32view[2] = 0x0000_0001;
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let float64view = new Float64Array(ab);
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function foo(a) {
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vvv = a;
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}
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%PrepareFunctionForOptimization(foo);
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foo(float64view[0]);
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foo(float64view[0]);
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%OptimizeFunctionOnNextCall(foo);
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// Ensures we don't deopt if we use a different NaN bit
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// representation.
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foo(float64view[1]);
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assertTrue(isOptimized(foo));
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})();
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