1 files changed, 97 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/warp/set-has-object.js b/js/src/jit-test/tests/warp/set-has-object.js
new file mode 100644
index 0000000000..87cf85f791
--- /dev/null
+++ b/js/src/jit-test/tests/warp/set-has-object.js
@@ -0,0 +1,97 @@
+// Similar test as "cacheir/set-has-object.js", except that we now perform
+// duplicate lookups to ensure GVN works properly.
+
+// Return a new set, possibly filling some dummy entries to enforce creating
+// multiple hash buckets.
+function createSet(values, n) {
+  var xs = [...values];
+  for (var i = 0; i < n; ++i) {
+    xs.push({});
+  }
+  return new Set(xs);
+}
+
+function runTest(fn) {
+  fn(0);
+  fn(100);
+}
+
+function test_same_set(n) {
+  var xs = [{}, {}];
+  var ys = [{}, {}];
+  var zs = [...xs, ...ys];
+  var set = createSet(xs, n);
+
+  var N = 100;
+  var c = 0;
+  for (var i = 0; i < N; ++i) {
+    var z = zs[i & 3];
+    if (set.has(z)) c++;
+    if (set.has(z)) c++;
+  }
+  assertEq(c, N);
+}
+runTest(test_same_set);
+
+// Duplicate the above tests, but this time use a different set.
+
+function test_different_set(n) {
+  var xs = [{}, {}];
+  var ys = [{}, {}];
+  var zs = [...xs, ...ys];
+  var set1 = createSet(xs, n);
+  var set2 = createSet(xs, n);
+
+  var N = 100;
+  var c = 0;
+  for (var i = 0; i < N; ++i) {
+    var z = zs[i & 3];
+    if (set1.has(z)) c++;
+    if (set2.has(z)) c++;
+  }
+  assertEq(c, N);
+}
+runTest(test_different_set);
+
+// Test the alias information is correct.
+
+function test_alias(n) {
+  var xs = [{}, {}];
+  var set = createSet([], n);
+
+  var N = 100;
+  var c = 0;
+  for (var i = 0; i < N; ++i) {
+    var x = xs[i & 1];
+
+    set.add(x);
+    if (set.has(x)) c++;
+
+    set.delete(x);
+    if (set.has(x)) c++;
+  }
+  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 set = new Set();
+  var c = 0;
+  var N = 100;
+  for (var i = 0; i < N; ++i) {
+    var k = {};
+    set.add(k);
+
+    if (set.has(k)) c++;
+
+    minorgc();
+
+    if (set.has(k)) c++;
+  }
+
+  assertEq(c, N * 2);
+}
+testRekey();