1 files changed, 37 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/cacheir/typedarray-non-int32-index-set.js b/js/src/jit-test/tests/cacheir/typedarray-non-int32-index-set.js
new file mode 100644
index 0000000000..c3a6637516
--- /dev/null
+++ b/js/src/jit-test/tests/cacheir/typedarray-non-int32-index-set.js
@@ -0,0 +1,37 @@
+function set(k) {
+  // Different typed array types to ensure we emit a SetProp IC.
+  var xs = [
+    new Int32Array(10),
+    new Int16Array(10),
+  ];
+
+  for (var i = 0; i < 100; ++i) {
+    var x = xs[i & 1];
+    x[k] = 0;
+  }
+
+  assertEq(xs[0][k], undefined);
+  assertEq(xs[1][k], undefined);
+}
+
+// Make sure we use a distinct function for each test.
+function test(fn) {
+  return Function(`return ${fn};`)();
+}
+
+// Negative numbers values aren't int32 indices.
+test(set)(-1);
+test(set)(-2147483648);
+test(set)(-2147483649);
+
+// Int32 indices must be less-or-equal to max-int32.
+test(set)(2147483648);
+
+// Int32 indices must not have fractional parts.
+test(set)(1.5);
+test(set)(-1.5);
+
+// Non-finite numbers aren't int32 indices.
+test(set)(NaN);
+test(set)(-Infinity);
+test(set)(Infinity);