1 files changed, 30 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/basic/testTypedArrayByteRegs.js b/js/src/jit-test/tests/basic/testTypedArrayByteRegs.js
new file mode 100644
index 0000000000..09c6d320ba
--- /dev/null
+++ b/js/src/jit-test/tests/basic/testTypedArrayByteRegs.js
@@ -0,0 +1,30 @@
+// Uint8Array and Int8Array need single byte registers.
+// Test for id and value having the same backing.
+function f() {
+    var x = new Uint8Array(30);
+    for (var i=0; i<x.length; i++) {
+        x[i] = i;
+    }
+
+    var res = 0;
+    for (var i=0; i<x.length; i++) {
+        res += x[i];
+    }
+    assertEq(res, 435);
+}
+f();
+
+// Test for id and value having a different backing.
+function g() {
+    var x = new Int8Array(30);
+    for (var i=1; i<x.length; i++) {
+        x[i-1] = i;
+    }
+
+    var res = 0;
+    for (var i=0; i<x.length; i++) {
+        res += x[i];
+    }
+    assertEq(res, 435);
+}
+g();