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-rw-r--r--js/src/jit-test/tests/arrays/ion-pop-denseinitializedlength-less-than-length.js49
1 files changed, 49 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/arrays/ion-pop-denseinitializedlength-less-than-length.js b/js/src/jit-test/tests/arrays/ion-pop-denseinitializedlength-less-than-length.js
new file mode 100644
index 0000000000..9f4bda0236
--- /dev/null
+++ b/js/src/jit-test/tests/arrays/ion-pop-denseinitializedlength-less-than-length.js
@@ -0,0 +1,49 @@
+load(libdir + "asserts.js");
+
+function f(arr)
+{
+ arr.pop();
+}
+
+var N = 100;
+
+function test()
+{
+ // Create an array of arrays, to be iterated over for [].pop-calling. We
+ // can't just loop on pop on a single array with non-writable length because
+ // pop throws when called on an array with non-writable length.
+ var arrs = [];
+ for (var i = 0; i < N; i++)
+ arrs.push([0, 1, 2, 3]);
+
+ // Test Ion-pop where dense initialized length < length.
+ var a = [0, 1, 2];
+ a.length = 4;
+
+ arrs.push(a);
+
+ for (var i = 0, sz = arrs.length; i < sz; i++)
+ f(arrs[i]);
+
+ return arrs;
+}
+
+var arrs = test();
+assertEq(arrs.length, N + 1);
+for (var i = 0; i < N; i++)
+{
+ assertEq(arrs[i].length, 3, "unexpected length for arrs[" + i + "]");
+ assertEq(arrs[i][0], 0, "bad element for arrs[" + i + "][0]");
+ assertEq(arrs[i][1], 1, "bad element for arrs[" + i + "][1]");
+ assertEq(arrs[i][2], 2, "bad element for arrs[" + i + "][2]");
+ assertEq(3 in arrs[i], false, "shouldn't be a third element");
+ assertEq(arrs[i][3], undefined);
+}
+
+var a = arrs[N];
+assertEq(a.length, 3, "unexpected length for arrs[" + i + "]");
+assertEq(a[0], 0, "bad element for arrs[" + i + "][0]");
+assertEq(a[1], 1, "bad element for arrs[" + i + "][1]");
+assertEq(a[2], 2, "bad element for arrs[" + i + "][2]");
+assertEq(3 in a, false, "shouldn't be a third element");
+assertEq(a[3], undefined);