1 files changed, 35 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/warp/stub-folding-add-case.js b/js/src/jit-test/tests/warp/stub-folding-add-case.js
new file mode 100644
index 0000000000..a31b0f2e7e
--- /dev/null
+++ b/js/src/jit-test/tests/warp/stub-folding-add-case.js
@@ -0,0 +1,35 @@
+// |jit-test| --fast-warmup
+
+var sum = 0;
+function foo(o) {
+    sum += o.a;
+}
+
+with({}) {}
+
+// Fold a stub with two cases.
+for (var i = 0; i < 11; i++) {
+    foo({a:1});
+    foo({a:1,b:2});
+}
+
+// Add a third case.
+foo({a:1,b:2,c:3});
+
+// Warp-compile.
+for (var i = 0; i < 16; i++) {
+    foo({a:1});
+}
+
+// Add a fourth case.
+foo({a:1,b:2,c:3,d:4});
+
+// Run for a while in Warp.
+for (var i = 0; i < 20; i++) {
+    foo({a:1});
+    foo({a:1,b:2});
+    foo({a:1,b:2,c:3});
+    foo({a:1,b:2,c:3,d:4});
+}
+
+assertEq(sum, 120);