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-rw-r--r--js/src/jit-test/tests/cacheir/unboxed-element-hole.js41
1 files changed, 41 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/cacheir/unboxed-element-hole.js b/js/src/jit-test/tests/cacheir/unboxed-element-hole.js
new file mode 100644
index 0000000000..c3afd13dab
--- /dev/null
+++ b/js/src/jit-test/tests/cacheir/unboxed-element-hole.js
@@ -0,0 +1,41 @@
+function noElement() {
+ for (var i = 0; i < 1e4; i++) {
+ var obj = {length: 0};
+ assertEq(obj[0], undefined);
+ }
+}
+
+function noElementCheckPrototype() {
+ for (var i = 0; i < 1e4; i++) {
+ var obj = {length: 0};
+ assertEq(obj[0], i <= 1e3 ? undefined : 1);
+ if (i == 1e3) {
+ Object.prototype[0] = 1;
+ }
+ }
+ delete Object.prototype[0];
+}
+
+function elementOnPrototype() {
+ Object.prototype[0] = 3;
+ for (var i = 0; i < 1e4; i++) {
+ var obj = {length: 0};
+ assertEq(obj[0], 3);
+ }
+ delete Object.prototype[0];
+}
+
+function checkExpando() {
+ for (var i = 0; i < 1e4; i++) {
+ var obj = {length: 0};
+ if (i >= 1e3) {
+ obj[0] = 2;
+ }
+ assertEq(obj[0], i < 1e3 ? undefined : 2);
+ }
+}
+
+noElement();
+noElementCheckPrototype();
+elementOnPrototype();
+checkExpando();