spreadcall-not-optimized-static-6a.js (918B)
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 // %ArrayIteratorPrototype%'s [[Prototype]] was changed, as a result all properties are marked as unknown. 18 function test() { 19 var ArrayIteratorPrototype = Object.getPrototypeOf(Array.prototype[Symbol.iterator]()); 20 Object.setPrototypeOf(ArrayIteratorPrototype, null); 21 function fn(...rest) { 22 return add(...rest); 23 } 24 for (var i = 0; i < 2000; ++i) { 25 assertEq(fn(1, 2), 3); 26 } 27 } 28 test();