v8/test/mjsunit/compiler/math-max.js
Ross McIlroy 31a3cfbc10 [Test] Add PrepareForOptimization to mjsunit/compiler
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}
2019-03-04 12:25:41 +00:00

41 lines
1.1 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
// Test the case where TurboFan can statically rule out -0 from the
// Math.max type.
(function() {
function foo(x) {
// Arrange x such that TurboFan infers type [-inf, inf] \/ MinusZero.
x = +x;
x = Math.round(x);
return Object.is(-0, Math.max(1, x))
}
%PrepareFunctionForOptimization(foo);
assertFalse(foo(-0));
assertFalse(foo(-1));
%OptimizeFunctionOnNextCall(foo);
assertFalse(foo(-0));
assertFalse(foo(-1));
})();
// Test the case where -0 is ruled out because it's strictly less than +0.
(function() {
function foo(x) {
// Arrange x such that TurboFan infers type [-inf, inf] \/ MinusZero.
x = +x;
x = Math.round(x);
return Object.is(-0, Math.max(0, x))
}
%PrepareFunctionForOptimization(foo);
assertFalse(foo(-0));
assertFalse(foo(-1));
%OptimizeFunctionOnNextCall(foo);
assertFalse(foo(-0));
assertFalse(foo(-1));
})();