spreadcall-not-optimized-static-1.js (857B)
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 // The rest argument is overwritten with a non-Array object. 18 function test() { 19 var badRest = { 20 *[Symbol.iterator]() { 21 yield 3; 22 yield 4; 23 } 24 }; 25 function fn(...rest) { 26 rest = badRest; 27 return add(...rest); 28 } 29 for (var i = 0; i < 2000; ++i) { 30 assertEq(fn(1, 2), 7); 31 } 32 } 33 test();