v8/test/mjsunit/regress/regress-crbug-903043.js

// 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

(function() {
function foo() {
  const x = 1e-1;
  return Object.is(-0, x * -1e-308);
};
%PrepareFunctionForOptimization(foo);
assertFalse(foo());
assertFalse(foo());
%OptimizeFunctionOnNextCall(foo);
assertFalse(foo());
})();

(function() {
function foo(x) {
  return Object.is(-0, x * -1e-308);
};
%PrepareFunctionForOptimization(foo);
assertFalse(foo(1e-1));
assertFalse(foo(1e-1));
%OptimizeFunctionOnNextCall(foo);
assertFalse(foo(1e-1));
})();

(function() {
function foo(x) {
  return Object.is(-0, x);
};
%PrepareFunctionForOptimization(foo);
assertFalse(foo(1e-1 * -1e-308));
assertFalse(foo(1e-1 * -1e-308));
%OptimizeFunctionOnNextCall(foo);
assertFalse(foo(1e-1 * -1e-308));
})();