blob: 2cbb8d2407cfdb323ddf6199e7bda043a419839f (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
|
// 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
// Known symbols strict equality.
(function() {
const a = Symbol("a");
const b = Symbol("b");
function foo() { return a === b; }
%PrepareFunctionForOptimization(foo);
assertFalse(foo());
assertFalse(foo());
%OptimizeFunctionOnNextCall(foo);
assertFalse(foo());
})();
// Known symbol on one side strict equality.
(function() {
const a = Symbol("a");
const b = Symbol("b");
function foo(a) { return a === b; }
%PrepareFunctionForOptimization(foo);
assertTrue(foo(b));
assertFalse(foo(a));
assertTrue(foo(b));
assertFalse(foo(a));
%OptimizeFunctionOnNextCall(foo);
assertTrue(foo(b));
assertFalse(foo(a));
})();
// Feedback based symbol strict equality.
(function() {
const a = Symbol("a");
const b = Symbol("b");
function foo(a, b) { return a === b; }
%PrepareFunctionForOptimization(foo);
assertTrue(foo(b, b));
assertFalse(foo(a, b));
assertTrue(foo(a, a));
assertFalse(foo(b, a));
%OptimizeFunctionOnNextCall(foo);
assertTrue(foo(a, a));
assertFalse(foo(b, a));
})();
|