mirror of
https://github.com/nodejs/node.git
synced 2025-05-16 10:12:54 +00:00
2dcc3665ab
PR-URL: https://github.com/nodejs/node/pull/28016 Reviewed-By: Colin Ihrig <cjihrig@gmail.com> Reviewed-By: Refael Ackermann (רפאל פלחי) <refack@gmail.com> Reviewed-By: Rich Trott <rtrott@gmail.com> Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com> Reviewed-By: Jiawen Geng <technicalcute@gmail.com>
82 lines
2.1 KiB
JavaScript
82 lines
2.1 KiB
JavaScript
// Copyright 2019 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
|
|
|
|
(function() {
|
|
function foo(string) { return string.startsWith('a'); }
|
|
|
|
%PrepareFunctionForOptimization(foo);
|
|
assertEquals(false, foo(''));
|
|
assertEquals(true, foo('a'));
|
|
assertEquals(false, foo('ba'));
|
|
assertEquals(true, foo('abc'));
|
|
%OptimizeFunctionOnNextCall(foo);
|
|
assertEquals(false, foo(''));
|
|
assertEquals(true, foo('a'));
|
|
assertEquals(false, foo('ba'));
|
|
assertEquals(true, foo('abc'));
|
|
assertOptimized(foo);
|
|
})();
|
|
|
|
(function() {
|
|
function f() { return "abc".startsWith(); }
|
|
|
|
%PrepareFunctionForOptimization(f);
|
|
assertEquals(false, f());
|
|
assertEquals(false, f());
|
|
%OptimizeFunctionOnNextCall(f);
|
|
assertEquals(false, f());
|
|
assertOptimized(f);
|
|
})();
|
|
|
|
(function() {
|
|
function g(n) { return "abc".startsWith("a", n); }
|
|
|
|
%PrepareFunctionForOptimization(g);
|
|
assertEquals(true, g(-1));
|
|
assertEquals(true, g(0));
|
|
assertEquals(false, g(1));
|
|
assertEquals(false, g(2));
|
|
assertEquals(false, g(3));
|
|
assertEquals(false, g(4));
|
|
%OptimizeFunctionOnNextCall(g);
|
|
assertEquals(true, g(-1));
|
|
assertEquals(true, g(0));
|
|
assertEquals(false, g(1));
|
|
assertEquals(false, g(2));
|
|
assertEquals(false, g(3));
|
|
assertEquals(false, g(4));
|
|
assertOptimized(g);
|
|
})();
|
|
|
|
(function() {
|
|
function g(n) { return "cba".startsWith("a", n); }
|
|
|
|
%PrepareFunctionForOptimization(g);
|
|
assertEquals(false, g(-1));
|
|
assertEquals(false, g(0));
|
|
assertEquals(false, g(1));
|
|
assertEquals(true, g(2));
|
|
assertEquals(false, g(3));
|
|
assertEquals(false, g(4));
|
|
%OptimizeFunctionOnNextCall(g);
|
|
assertEquals(false, g(-1));
|
|
assertEquals(false, g(0));
|
|
assertEquals(false, g(1));
|
|
assertEquals(true, g(2));
|
|
assertEquals(false, g(3));
|
|
assertEquals(false, g(4));
|
|
assertOptimized(g);
|
|
})();
|
|
|
|
(function() {
|
|
function f(n) { return "cba".startsWith("a", n); }
|
|
%PrepareFunctionForOptimization(f);
|
|
f();
|
|
f();
|
|
%OptimizeFunctionOnNextCall(f);
|
|
assertEquals(false, f(1073741824));
|
|
})();
|