shifted-elements2.js

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// Always use the per-element barrier.

gczeal(12);

function f() {

    var arr = [];

    for (var i = 0; i < 1000; i++)

        arr.push(i);

    gc(); // Ensure arr is tenured.

    // Now store a nursery object somewhere in the array, shift elements,

    // trigger a GC, and check the post barrier kept the object alive.

    for (var i = 0; i < 20; i++)

        arr.shift();

    for (var i = 0; i < 40; i++)

        arr[900] = {x: i};

    for (var i = 0; i < 10; i++)

        arr.shift();

    gc();

    assertEq(arr[890].x, 39);

f();