mirror of
https://github.com/nodejs/node.git
synced 2025-05-16 00:11:20 +00:00
6bd756d7c6
PR-URL: https://github.com/nodejs/node/pull/44741 Fixes: https://github.com/nodejs/node/issues/44650 Fixes: https://github.com/nodejs/node/issues/37472 Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl> Reviewed-By: Jiawen Geng <technicalcute@gmail.com> Reviewed-By: James M Snell <jasnell@gmail.com>
47 lines
1.0 KiB
JavaScript
47 lines
1.0 KiB
JavaScript
// Copyright 2021 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 --turbofan --no-always-turbofan
|
|
|
|
|
|
(function() {
|
|
function foo(a) {
|
|
var x = -0;
|
|
if (a) {
|
|
x = 0;
|
|
}
|
|
return x + (x - 0);
|
|
}
|
|
%PrepareFunctionForOptimization(foo);
|
|
assertEquals(0, foo(true));
|
|
%OptimizeFunctionOnNextCall(foo);
|
|
assertEquals(-0, foo(false));
|
|
})();
|
|
|
|
|
|
// The following test already passed before the bugfix.
|
|
|
|
(function() {
|
|
function foo(a) {
|
|
var x = 0;
|
|
var y = -0;
|
|
if (a == 42) x = 2**32 - 1;
|
|
if (a == 0) {
|
|
x = 0
|
|
y = 1;
|
|
}
|
|
if (a == 2) x = -0;
|
|
return x + y;
|
|
}
|
|
%PrepareFunctionForOptimization(foo);
|
|
assertEquals(1, foo(0));
|
|
%OptimizeFunctionOnNextCall(foo);
|
|
assertEquals(0, foo(1));
|
|
// We don't automatically deopt for y = -0 because (x + -0) can only become -0
|
|
// for x = -0.
|
|
assertOptimized(foo);
|
|
assertEquals(-0, foo(2));
|
|
assertUnoptimized(foo);
|
|
})();
|