v8/test/mjsunit/compiler/js-create-arguments.js

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// 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
class C extends Object {
bla() {}
}
const bla = C.prototype.bla;
function bar(c) {
%TurbofanStaticAssert(c.bla === bla);
}
function foo() {
let c = new C(...arguments);
bar(c);
}
%PrepareFunctionForOptimization(bar);
%PrepareFunctionForOptimization(C);
%PrepareFunctionForOptimization(main);
%PrepareFunctionForOptimization(foo);
bar({});
bar({a:1});
bar({aa:1});
bar({aaa:1});
bar({aaaa:1});
bar({aaaaa:1});
function main() {
return foo(1,2,3);
};
main();
main();
%OptimizeFunctionOnNextCall(main);
main();