diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/ion/math-imul-folding.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/ion/math-imul-folding.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,7 @@
+function sprod(x, y) {
+    var iprod = Math.imul(x | 0, y | 0);
+    var fprod = (x | 0) * (y | 0);
+    return iprod + fprod;
+}
+assertEq(sprod(2, 2), 8);
+assertEq(sprod(0x10000, 0x10000), 0x100000000);