1 files changed, 32 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/ion/testStringFromCodePoint.js b/js/src/jit-test/tests/ion/testStringFromCodePoint.js
new file mode 100644
index 0000000000..6344e05383
--- /dev/null
+++ b/js/src/jit-test/tests/ion/testStringFromCodePoint.js
@@ -0,0 +1,32 @@
+// |jit-test| --ion-warmup-threshold=20
+
+function testBailout() {
+    function f(v, r) {
+        for (var i = 0; i < 50; ++i) {
+            // Ensure DCE and LICM don't eliminate calls to fromCodePoint in
+            // case the input argument is not a valid code point.
+            if (i === 0) {
+                r();
+            }
+            String.fromCodePoint(v);
+            String.fromCodePoint(v);
+            String.fromCodePoint(v);
+        }
+    }
+
+    var result = [];
+    function r() {
+        result.push("ok");
+    }
+
+    do {
+        result.length = 0;
+        try {
+            f(0, r);
+            f(0, r);
+            f(0x10ffff + 1, r);
+        } catch (e) {}
+        assertEq(result.length, 3);
+    } while (!inIon());
+}
+testBailout();