1 files changed, 29 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/fuses/htmldda-1.js b/js/src/jit-test/tests/fuses/htmldda-1.js
new file mode 100644
index 0000000000..f64e7efb44
--- /dev/null
+++ b/js/src/jit-test/tests/fuses/htmldda-1.js
@@ -0,0 +1,29 @@
+function f(x, y, z, a, b, c) {
+  let sum = 0;
+  sum += x == undefined ? 1 : 0;
+  sum += y == undefined ? 1 : 0;
+  sum += z == undefined ? 1 : 0;
+  sum += a == undefined ? 1 : 0;
+  sum += b == undefined ? 1 : 0;
+  sum += c == undefined ? 1 : 0;
+  return sum;
+}
+
+let iters = 500;
+function test(x) {
+  let count = 0;
+  let [y, z, a, b, c] = [{}, {}, {}, {}, {}];
+  for (let i = 0; i < iters; i++) {
+    count += f(x, y, z, a, b, c) ? 1 : 0;
+  }
+  return count;
+}
+
+let count = test({});
+assertEq(count, 0);
+
+// pop fuse, and run test again.
+x = createIsHTMLDDA();
+count = test(x);
+
+assertEq(count, iters);