1 files changed, 48 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/basic/object-is-inlined.js b/js/src/jit-test/tests/basic/object-is-inlined.js
new file mode 100644
index 0000000000..0220175c11
--- /dev/null
+++ b/js/src/jit-test/tests/basic/object-is-inlined.js
@@ -0,0 +1,48 @@
+function SameValue(x, y) {
+    if (x === y) {
+        return (x !== 0) || (1 / x === 1 / y);
+    }
+    return (x !== x && y !== y);
+}
+
+function* cartesian(a, b = a) {
+    for (var pa of a) {
+        for (var pb of b) {
+            yield [pa, pb];
+        }
+    }
+}
+
+var testValues = {
+    Double: `[-0.0, +0.0, 1.0, NaN]`,
+    Int32: `[-1, 0, 1, 2]`,
+    Value: `[-0.0, +0.0, "", NaN]`,
+};
+
+for (var [xs, ys] of cartesian(Object.values(testValues))) {
+    var fn = Function(`
+        var xs = ${xs};
+        var ys = ${ys};
+        assertEq(xs.length, 4);
+        assertEq(ys.length, 4);
+
+        // Compare each entry in xs with each entry in ys and ensure Object.is
+        // computes the same result as SameValue.
+        var actual = 0, expected = 0;
+        for (var i = 0; i < 1000; ++i) {
+            // 0 1 2 3
+            var xi = i & 3;
+
+            // 0 1 2 3  1 2 3 0  2 3 0 1  3 0 1 2
+            var yi = (i + ((i >> 2) & 3)) & 3;
+
+            actual += Object.is(xs[xi], ys[yi]) ? 1 : 0;
+            expected += SameValue(xs[xi], ys[yi]) ? 1 : 0;
+        }
+        assertEq(actual, expected);
+    `);
+    for (var i = 0; i < 3; ++i) {
+        fn();
+    }
+}
+