diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/ion/bug705351.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/ion/bug705351.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,38 @@
+var a = 1.1;
+function f1() {
+    return a + 0.2;
+}
+function test1() {
+    for (var i=0; i<100; i++) {
+        assertEq(f1(), 1.3);
+    }
+    a = 20;
+    assertEq(f1(), 20.2);
+}
+test1();
+
+function f2(arr) {
+    return arr[2] + 0.2;
+}
+function test2() {
+    var a = [1.1, 2.2, 3.3, 4.4];
+    for (var i=0; i<100; i++) {
+        assertEq(f2(a), 3.5);
+    }
+    a[2] = 123;
+    assertEq(f2(a), 123.2);
+}
+test2();
+
+function f3(arr, idx) {
+    return arr[idx] + 0.2;
+}
+function test3() {
+    var a = [1.1, 2.2, 3.3, 4.4];
+    for (var i=0; i<100; i++) {
+        assertEq(f3(a, 2), 3.5);
+    }
+    a[2] = 123;
+    assertEq(f3(a, 2), 123.2);
+}
+test3();