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// Tests when JSOP_OPTIMIZE_SPREADCALL no longer apply after the initial Ion
// compilation.
// JSOP_OPTIMIZE_SPREADCALL can be optimised when the following conditions
// are fulfilled:
// (1) the argument is an array
// (2) the array has no hole
// (3) array[@@iterator] is not modified
// (4) the array's prototype is Array.prototype
// (5) Array.prototype[@@iterator] is not modified
// (6) %ArrayIteratorPrototype%.next is not modified
function add(a, b) {
return a + b;
}
// The rest arguments don't share a common prototype.
function test() {
class MyArray1 extends Array { }
class MyArray2 extends Array { }
function maybeInvalidate(rest) {
// Use a WithStatement to prevent Ion-inlining. This ensures any
// bailouts due to type changes don't occur in this function, but
// instead in the caller.
with ({});
if (i >= 1900) {
if (i & 1)
rest = new MyArray1(3, 4);
else
rest = new MyArray2(5, 6);
}
return rest;
}
function fn(...rest) {
rest = maybeInvalidate(rest);
return add(...rest);
}
for (var i = 0; i < 4000; ++i) {
assertEq(fn(1, 2), i < 1900 ? 3 : (i & 1) ? 7 : 11);
}
}
test();