spreadcall-not-optimized-static-5a.js (810B)
1 // Tests when JSOP_OPTIMIZE_SPREADCALL can't be applied during the initial 2 // Ion compilation. 3 4 // JSOP_OPTIMIZE_SPREADCALL can be optimised when the following conditions 5 // are fulfilled: 6 // (1) the argument is an array 7 // (2) the array has no hole 8 // (3) array[@@iterator] is not modified 9 // (4) the array's prototype is Array.prototype 10 // (5) Array.prototype[@@iterator] is not modified 11 // (6) %ArrayIteratorPrototype%.next is not modified 12 13 function add(a, b) { 14 return a + b; 15 } 16 17 // Array.prototype's [[Prototype]] was changed, as a result all properties are marked as unknown. 18 function test() { 19 Object.setPrototypeOf(Array.prototype, null); 20 function fn(...rest) { 21 return add(...rest); 22 } 23 for (var i = 0; i < 2000; ++i) { 24 assertEq(fn(1, 2), 3); 25 } 26 } 27 test();