Adding upstream version 124.0.1.upstream/124.0.1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 31 insertions, 0 deletions

diff --git a/js/src/jit-test/tests/ion/object-keys-00.js b/js/src/jit-test/tests/ion/object-keys-00.js
new file mode 100644
index 0000000000..497823e2e2
--- /dev/null
+++ b/js/src/jit-test/tests/ion/object-keys-00.js
@@ -0,0 +1,31 @@
+// This test case is used to test the optimized code path where the computation
+// of `Object.keys(...).length` no longer compute `Object.keys(...)` as an
+// intermediate result.
+//
+// This test verifies that the result remain consistent after the optimization.
+
+function cmp_keys_length(a, b) {
+    return Object.keys(a).length == Object.keys(b).length;
+}
+
+let objs = [
+    {x:0, a: 1, b: 2},
+    {x:1, b: 1, c: 2},
+    {x:2, c: 1, d: 2},
+    {x:3, a: 1, b: 2, c: 3},
+    {x:4, b: 1, c: 2, d: 3},
+    {x:5, a: 1, b: 2, c: 3, d: 4}
+];
+
+function max_of(o) {
+    return o?.d ?? o?.c ?? o?.b ?? 0;
+}
+
+with({}) {}
+for (let i = 0; i < 1000; i++) {
+    for (let o1 of objs) {
+        for (let o2 of objs) {
+            assertEq(cmp_keys_length(o1, o2), max_of(o1) == max_of(o2));
+        }
+    }
+}