blob: 0925aa0da3e61bdb149bcebff66656f4f13633b8 [file] [log] [blame]
// 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 --noalways-opt
// Test that NumberModulus passes kIdentifiesZero to the
// left hand side input when the result doesn't care about
// 0 vs -0, even when the inputs are outside Signed32.
(function() {
function foo(x) {
return (x * -2) % (2 ** 32) === 0;
}
assertFalse(foo(2));
assertFalse(foo(1));
%OptimizeFunctionOnNextCall(foo);
assertFalse(foo(2));
assertFalse(foo(1));
// Now `foo` should stay optimized even if `x * -2` would
// produce -0, aka when we pass a zero value for `x`.
assertTrue(foo(0));
assertOptimized(foo);
})();