mirror of
https://github.com/nodejs/node.git
synced 2025-05-15 17:23:43 +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>
81 lines
2.2 KiB
JavaScript
81 lines
2.2 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 --turbofan
|
|
|
|
// Test that NumberAbs correctly deals with PositiveInteger \/ MinusZero
|
|
// and turns the -0 into a 0.
|
|
(function() {
|
|
function foo(x) {
|
|
x = Math.floor(x);
|
|
x = Math.max(x, -0);
|
|
return 1 / Math.abs(x);
|
|
}
|
|
|
|
%PrepareFunctionForOptimization(foo);
|
|
assertEquals(Infinity, foo(-0));
|
|
assertEquals(Infinity, foo(-0));
|
|
%OptimizeFunctionOnNextCall(foo);
|
|
assertEquals(Infinity, foo(-0));
|
|
})();
|
|
|
|
// Test that NumberAbs properly passes the kIdentifyZeros truncation
|
|
// for Signed32 \/ MinusZero inputs.
|
|
(function() {
|
|
function foo(x) {
|
|
return Math.abs(x * -2);
|
|
}
|
|
|
|
%PrepareFunctionForOptimization(foo);
|
|
assertEquals(2, foo(-1));
|
|
assertEquals(4, foo(-2));
|
|
%OptimizeFunctionOnNextCall(foo);
|
|
assertEquals(2, foo(-1));
|
|
assertEquals(4, foo(-2));
|
|
assertOptimized(foo);
|
|
// Now `foo` should stay optimized even if `x * -2` would produce `-0`.
|
|
assertEquals(0, foo(0));
|
|
assertOptimized(foo);
|
|
})();
|
|
|
|
// Test that NumberAbs properly passes the kIdentifyZeros truncation
|
|
// for Unsigned32 \/ MinusZero inputs.
|
|
(function() {
|
|
function foo(x) {
|
|
x = x | 0;
|
|
return Math.abs(Math.max(x * -2, 0));
|
|
}
|
|
|
|
%PrepareFunctionForOptimization(foo);
|
|
assertEquals(2, foo(-1));
|
|
assertEquals(4, foo(-2));
|
|
%OptimizeFunctionOnNextCall(foo);
|
|
assertEquals(2, foo(-1));
|
|
assertEquals(4, foo(-2));
|
|
assertOptimized(foo);
|
|
// Now `foo` should stay optimized even if `x * -2` would produce `-0`.
|
|
assertEquals(0, foo(0));
|
|
assertOptimized(foo);
|
|
})();
|
|
|
|
// Test that NumberAbs properly passes the kIdentifyZeros truncation
|
|
// for OrderedNumber inputs.
|
|
(function() {
|
|
function foo(x) {
|
|
x = x | 0;
|
|
return Math.abs(Math.min(x * -2, 2 ** 32));
|
|
}
|
|
|
|
%PrepareFunctionForOptimization(foo);
|
|
assertEquals(2, foo(-1));
|
|
assertEquals(4, foo(-2));
|
|
%OptimizeFunctionOnNextCall(foo);
|
|
assertEquals(2, foo(-1));
|
|
assertEquals(4, foo(-2));
|
|
assertOptimized(foo);
|
|
// Now `foo` should stay optimized even if `x * -2` would produce `-0`.
|
|
assertEquals(0, foo(0));
|
|
assertOptimized(foo);
|
|
})();
|