1 files changed, 35 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/warp/stub-folding.js b/js/src/jit-test/tests/warp/stub-folding.js
new file mode 100644
index 0000000000..0b7d7fdda4
--- /dev/null
+++ b/js/src/jit-test/tests/warp/stub-folding.js
@@ -0,0 +1,35 @@
+// |jit-test| --fast-warmup
+
+with({}) {}
+
+class A {
+    foo() { return 3; }
+    get z() { return 5; }
+}
+
+class B1 extends A {
+    constructor(y) {
+        super();
+        this.y = y;
+    }
+}
+
+class B2 extends A {
+    constructor(x,y) {
+        super();
+        this.y = y;
+        this.x = x;
+    }
+}
+
+var sum = 0;
+function foo(o) {
+    sum += o.foo() + o.y + o.z;
+}
+
+for (var i = 0; i < 50; i++) {
+    foo(new B1(i));
+    foo(new B2(i,i));
+}
+
+assertEq(sum, 3250);