33 lines
763 B
JavaScript
33 lines
763 B
JavaScript
|
// Copyright 2020 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 foo(v) {
|
||
|
|
let x = Math.floor(v);
|
||
|
|
Number.prototype[v] = 42;
|
||
|
|
return x + Math.floor(v);
|
||
|
|
}
|
||
|
|
|
||
|
|
%PrepareFunctionForOptimization(foo);
|
||
|
|
assertSame(foo(-0), -0);
|
||
|
|
assertSame(foo(-0), -0);
|
||
|
|
%OptimizeFunctionOnNextCall(foo);
|
||
|
|
assertSame(foo(-0), -0);
|
||
|
|
|
||
|
|
|
||
|
|
function bar(v) {
|
||
|
|
v = v ? (v|0) : -0; // v has now type Integral32OrMinusZero.
|
||
|
|
let x = Math.floor(v);
|
||
|
|
Number.prototype[v] = 42;
|
||
|
|
return x + Math.floor(v);
|
||
|
|
}
|
||
|
|
|
||
|
|
%PrepareFunctionForOptimization(bar);
|
||
|
|
assertSame(2, bar(1));
|
||
|
|
assertSame(2, bar(1));
|
||
|
|
%OptimizeFunctionOnNextCall(bar);
|
||
|
|
assertSame(-0, bar(-0));
|