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e31f0a7d25
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>
38 lines
1.0 KiB
JavaScript
38 lines
1.0 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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(function TestOptimizedFastExpm1MinusZero() {
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function foo() {
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return Object.is(Math.expm1(-0), -0);
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};
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%PrepareFunctionForOptimization(foo);
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assertTrue(foo());
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%OptimizeFunctionOnNextCall(foo);
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assertTrue(foo());
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})();
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(function TestOptimizedExpm1MinusZeroSlowPath() {
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function f(x) {
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return Object.is(Math.expm1(x), -0);
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};
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%PrepareFunctionForOptimization(f);
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function g() {
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return f(-0);
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};
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%PrepareFunctionForOptimization(g);
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f(0);
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// Compile function optimistically for numbers (with fast inlined
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// path for Math.expm1).
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%OptimizeFunctionOnNextCall(f);
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// Invalidate the optimistic assumption, deopting and marking non-number
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// input feedback in the call IC.
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f("0");
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// Optimize again, now with non-lowered call to Math.expm1.
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assertTrue(g());
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%OptimizeFunctionOnNextCall(g);
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assertTrue(g());
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})();
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