accessor-ic-shape-replacement.js

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// Make sure we properly update the getter when we update the holder

// shape in the getter IC.

function f(obj) {

    var x;

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

	x = obj.foo;

    return x;

var proto = {};

var obj1 = Object.create(proto);

var obj2 = Object.create(proto);

obj2.bar = "5";

Object.defineProperty(proto, "foo",

		      { get: function() { return 1; }, configurable: true });

assertEq(f(obj1), 1);

assertEq(f(obj2), 1);

Object.defineProperty(proto, "foo",

		      { get: function() { return 2; }, configurable: true });

assertEq(f(obj1), 2);

assertEq(f(obj2), 2);

// Make sure we properly update the setter when we update the holder

// shape in the setter IC.

function g(obj) {

    var x;

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

	obj.foo = i;

    return x;

var proto = {};

var obj1 = Object.create(proto);

var obj2 = Object.create(proto);

var sideEffect;

obj2.bar = "5";

Object.defineProperty(proto, "foo",

		      { set: function() { sideEffect = 1; }, configurable: true });

g(obj1);

assertEq(sideEffect, 1);

sideEffect = undefined;

g(obj2);

assertEq(sideEffect, 1);

sideEffect = undefined;

Object.defineProperty(proto, "foo",

		      { set: function() { sideEffect = 2; }, configurable: true });

g(obj1);

assertEq(sideEffect, 2);

sideEffect = undefined;

g(obj2);

assertEq(sideEffect, 2);