1 files changed, 16 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/self-hosting/relazify.js b/js/src/jit-test/tests/self-hosting/relazify.js
new file mode 100644
index 0000000000..b335f8026c
--- /dev/null
+++ b/js/src/jit-test/tests/self-hosting/relazify.js
@@ -0,0 +1,16 @@
+// |jit-test| skip-if: isLcovEnabled()
+
+// Self-hosted builtins use a special form of lazy function, but still can be
+// delazified in some cases.
+
+let obj = [];
+let fun = obj.map;
+assertEq(isLazyFunction(fun), true);
+
+// Delazify
+fun.call(obj, x => x);
+assertEq(isLazyFunction(fun), false);
+
+// Relazify
+relazifyFunctions(obj);
+assertEq(isLazyFunction(fun), true);