mirror of
https://github.com/nodejs/node.git
synced 2025-05-16 21:03:46 +00:00
270253c4e2
PR-URL: https://github.com/nodejs/node/pull/40907 Reviewed-By: Jiawen Geng <technicalcute@gmail.com> Reviewed-By: Colin Ihrig <cjihrig@gmail.com> Reviewed-By: Rich Trott <rtrott@gmail.com>
24 lines
709 B
JavaScript
24 lines
709 B
JavaScript
// Copyright 2018 the V8 project authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style license that can be
|
|
// found in the LICENSE file.
|
|
|
|
// Flags: --allow-natives-syntax --opt --no-assert-types
|
|
|
|
// Test that NumberRound propagates kIdentifyZeros truncations.
|
|
(function() {
|
|
function foo(x) {
|
|
return Math.abs(Math.round(x * -2));
|
|
}
|
|
|
|
%PrepareFunctionForOptimization(foo);
|
|
assertEquals(2, foo(1));
|
|
assertEquals(4, foo(2));
|
|
%OptimizeFunctionOnNextCall(foo);
|
|
assertEquals(2, foo(1));
|
|
assertEquals(4, foo(2));
|
|
assertOptimized(foo);
|
|
// Now `foo` should stay optimized even if `x * -2` would produce `-0`.
|
|
assertEquals(0, foo(0));
|
|
assertOptimized(foo);
|
|
})();
|