1 files changed, 67 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/wasm/js-promise-integration/gc.js b/js/src/jit-test/tests/wasm/js-promise-integration/gc.js
new file mode 100644
index 0000000000..c688b99cb5
--- /dev/null
+++ b/js/src/jit-test/tests/wasm/js-promise-integration/gc.js
@@ -0,0 +1,67 @@
+// Test if we can trace roots on the alternative stack.
+
+let i = 0;
+function js_import() {
+  return Promise.resolve({i: ++i});
+};
+let wasm_js_import = new WebAssembly.Function(
+    {parameters: ['externref'], results: ['externref']},
+    js_import,
+    {suspending: 'first'});
+
+let wasm_gc_import = new WebAssembly.Function(
+      {parameters: ['externref'], results: []},
+      async () => { gc(); },
+      {suspending: 'first'});
+
+var ins = wasmEvalText(`(module
+  (import "m" "import"
+    (func (param externref) (result externref)))
+  (import "m" "gc" (func (param externref)))
+  (import "m" "conv"
+    (func (param externref) (result i32)))
+
+    (global (export "g") (mut i32) (i32.const 0))
+
+    (func (export "test") (param externref)
+      (local i32)
+      i32.const 5
+      local.set 1
+      loop
+        local.get 0
+        call 0
+        local.get 0
+        call 1
+        call 2
+        global.get 0
+        i32.add
+        global.set 0
+        local.get 1
+        i32.const 1
+        i32.sub
+        local.tee 1
+        br_if 0
+      end
+    )
+
+)`, {
+  m: {
+    import: wasm_js_import,
+    gc: wasm_gc_import,
+    conv: ({i}) => i,
+  },
+});
+
+
+let wrapped_export = new WebAssembly.Function(
+  {parameters:[], results:['externref']},
+  ins.exports.test,
+  {promising : "first"}
+);
+
+let export_promise = wrapped_export();
+assertEq(0, ins.exports.g.value);
+assertEq(true, export_promise instanceof Promise);
+export_promise.then(() =>
+  assertEq(15, ins.exports.g.value)
+);