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PR-URL: https://github.com/nodejs/node/pull/28918 Reviewed-By: Colin Ihrig <cjihrig@gmail.com> Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl> Reviewed-By: Jiawen Geng <technicalcute@gmail.com> Reviewed-By: Rich Trott <rtrott@gmail.com>
46 lines
1.2 KiB
JavaScript
46 lines
1.2 KiB
JavaScript
// Copyright 2018 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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// We need a NumberModulus, so we make sure that we have a
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// SpeculativeNumberModulus with Number feedback, and later
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// on use it with known Number inputs (via the bitwise or),
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// such that JSTypedLowering turns it into the NumberModulus.
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function bar(x) { return x % 2; }
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bar(0.1);
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// Check that the Word32->Float64 conversion works properly.
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(function() {
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function foo(x) {
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// The NumberEqual identifies 0 and -0.
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return bar(x | -1) == 4294967295;
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}
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%PrepareFunctionForOptimization(foo);
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assertFalse(foo(1));
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assertFalse(foo(0));
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%OptimizeFunctionOnNextCall(foo);
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assertFalse(foo(1));
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assertFalse(foo(0));
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})();
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// Check that the Word32->Word32 conversion works properly.
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(function() {
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function makeFoo(y) {
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return function foo(x) {
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return bar(x | -1) == y;
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}
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}
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makeFoo(0); // Defeat the function context specialization.
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const foo = makeFoo(1);
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%PrepareFunctionForOptimization(foo);
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assertFalse(foo(1));
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assertFalse(foo(0));
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%OptimizeFunctionOnNextCall(foo);
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assertFalse(foo(1));
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assertFalse(foo(0));
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})();
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