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// Similar test as "cacheir/map-get-object.js", except that we now perform
// duplicate lookups to ensure GVN works properly.
// Return a new map, possibly filling some dummy entries to enforce creating
// multiple hash buckets.
function createMap(values, n) {
var xs = [...values];
for (var i = 0; i < n; ++i) {
xs.push({});
}
return new Map(xs.map((x, i) => [x, i + 1]));
}
function runTest(fn) {
fn(0);
fn(100);
}
function test_same_map(n) {
var xs = [{}, {}];
var ys = [{}, {}];
var zs = [...xs, ...ys];
var map = createMap(xs, n);
var N = 100;
var c = 0;
for (var i = 0; i < N; ++i) {
var z = zs[i & 3];
var v = map.get(z);
if (v !== undefined) c += v;
var w = map.get(z);
if (w !== undefined) c += w;
}
assertEq(c, N + N / 2);
}
runTest(test_same_map);
// Duplicate the above tests, but this time use a different map.
function test_different_map(n) {
var xs = [{}, {}];
var ys = [{}, {}];
var zs = [...xs, ...ys];
var map1 = createMap(xs, n);
var map2 = createMap(xs, n);
var N = 100;
var c = 0;
for (var i = 0; i < N; ++i) {
var z = zs[i & 3];
var v = map1.get(z);
if (v !== undefined) c += v;
var w = map2.get(z);
if (w !== undefined) c += w;
}
assertEq(c, N + N / 2);
}
runTest(test_different_map);
// Test the alias information is correct.
function test_alias(n) {
var xs = [{}, {}];
var map = createMap([], n);
var N = 100;
var c = 0;
for (var i = 0; i < N; ++i) {
var x = xs[i & 1];
map.set(x, 1);
var v = map.get(x);
map.delete(x);
var w = map.get(x);
c += v;
assertEq(w, undefined);
}
assertEq(c, N);
}
runTest(test_alias);
// And finally test that we don't actually support GVN for objects, because the
// hash changes when moving an object.
function testRekey() {
var map = new Map();
var c = 0;
var N = 100;
for (var i = 0; i < N; ++i) {
var k = {};
map.set(k, 1);
c += map.get(k);
minorgc();
c += map.get(k);
}
assertEq(c, N * 2);
}
testRekey();
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