1 files changed, 19 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/ion/typedarrayindex-const-double-representable-as-int32.js b/js/src/jit-test/tests/ion/typedarrayindex-const-double-representable-as-int32.js
new file mode 100644
index 0000000000..03468621fa
--- /dev/null
+++ b/js/src/jit-test/tests/ion/typedarrayindex-const-double-representable-as-int32.js
@@ -0,0 +1,19 @@
+function f(n) {
+  const ta = new Int32Array(n);
+
+  // When the TypedArray has a zero length, accessing the element at index 0
+  // should return undefined. That'll lead to using MGuardNumberToIntPtrIndex
+  // with supportOOB for the TypedArray index conversion.
+  const r = n === 0 ? undefined : 0;
+
+  // numberToDouble always returns a double number.
+  const k = numberToDouble(0);
+
+  for (var i = 0; i < 10; ++i) {
+    assertEq(ta[k], r);
+  }
+}
+
+for (var i = 0; i < 2; ++i) {
+  f(i);
+}