31a3cfbc10
BUG=v8:8801 Change-Id: I9d9d9824c6c9ad0176bbfd3723da1b578b17c256 Reviewed-on: https://chromium-review.googlesource.com/c/1495555 Commit-Queue: Ross McIlroy <rmcilroy@chromium.org> Reviewed-by: Mythri Alle <mythria@chromium.org> Cr-Commit-Position: refs/heads/master@{#60001}
63 lines
1.6 KiB
JavaScript
63 lines
1.6 KiB
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
|
|
|
|
// Test the extreme case where -0 is produced by rounding errors.
|
|
(function() {
|
|
function bar(x) {
|
|
return 1e-308 * x;
|
|
}
|
|
bar(1);
|
|
|
|
function foo() {
|
|
return Object.is(-0, bar(-1e-308));
|
|
}
|
|
|
|
%PrepareFunctionForOptimization(foo);
|
|
assertTrue(foo());
|
|
assertTrue(foo());
|
|
%OptimizeFunctionOnNextCall(foo);
|
|
assertTrue(foo());
|
|
})();
|
|
|
|
// Test that multiplication of integer by 0 produces the correct results.
|
|
(function() {
|
|
function foo(x) {
|
|
return 0 * Math.round(x);
|
|
}
|
|
|
|
%PrepareFunctionForOptimization(foo);
|
|
assertEquals(0, foo(0.1));
|
|
assertEquals(-0, foo(-0.1));
|
|
assertEquals(NaN, foo(NaN));
|
|
assertEquals(NaN, foo(Infinity));
|
|
assertEquals(NaN, foo(-Infinity));
|
|
%OptimizeFunctionOnNextCall(foo);
|
|
assertEquals(0, foo(0.1));
|
|
assertEquals(-0, foo(-0.1));
|
|
assertEquals(NaN, foo(NaN));
|
|
assertEquals(NaN, foo(Infinity));
|
|
assertEquals(NaN, foo(-Infinity));
|
|
})();
|
|
|
|
// Test that multiplication properly preserves -0 and NaN, and doesn't
|
|
// cut it short incorrectly.
|
|
(function() {
|
|
function foo(x, y) {
|
|
x = Math.sign(x);
|
|
y = Math.sign(y);
|
|
return Math.min(x * y, 0);
|
|
}
|
|
|
|
%PrepareFunctionForOptimization(foo);
|
|
assertEquals(0, foo(1, 0));
|
|
assertEquals(-0, foo(1, -0));
|
|
assertEquals(NaN, foo(NaN, -0));
|
|
%OptimizeFunctionOnNextCall(foo);
|
|
assertEquals(0, foo(1, 0));
|
|
assertEquals(-0, foo(1, -0));
|
|
assertEquals(NaN, foo(NaN, -0));
|
|
})();
|