diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/ion/bug754713-1.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/ion/bug754713-1.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,16 @@
+// Don't eliminate a phi if it has no SSA uses but its value is still
+// observable in the interpreter.
+var t = 100;
+function foo(ox) {
+    var x = ox;
+    var n = 0;
+    for (var i = 0; i < 90; i++) {
+        n += x.f.g;
+        if (i >= 80)
+            t;
+    }
+}
+function f() {}
+function g() {}
+f.prototype = {f:g};
+foo(new f());